* UBI support
@ 2010-07-05 13:16 Sascha Hauer
2010-07-05 13:16 ` [PATCH 01/12] crc32: activate crc32_no_comp (needed for jffs2 and UBI) Sascha Hauer
` (13 more replies)
0 siblings, 14 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
The following series prepares and implements UBI for barebox. Here is a log
while playing with UBI:
barebox@Phytec phyCORE-i.MX27:/ ubiattach dev/nand0.root
UBI: attaching mtd0 to ubi0
UBI: physical eraseblock size: 16384 bytes (16 KiB)
UBI: logical eraseblock size: 15360 bytes
UBI: smallest flash I/O unit: 512
UBI: VID header offset: 512 (aligned 512)
UBI: data offset: 1024
registering /dev/ubi0
UBI: attached mtd0 to ubi0
UBI: MTD device name: "nand0.root"
UBI: MTD device size: 61 MiB
UBI: number of good PEBs: 3940
UBI: number of bad PEBs: 4
UBI: max. allowed volumes: 89
UBI: wear-leveling threshold: 4096
UBI: number of internal volumes: 1
UBI: number of user volumes: 0
UBI: available PEBs: 3897
UBI: total number of reserved PEBs: 43
UBI: number of PEBs reserved for bad PEB handling: 39
UBI: max/mean erase counter: 27/1
barebox@Phytec phyCORE-i.MX27:/ ls -l dev/ubi0*
c--------- 0 dev/ubi0
barebox@Phytec phyCORE-i.MX27:/ ubimkvol dev/ubi0 root 32M
registering root as /dev/ubi0.root
barebox@Phytec phyCORE-i.MX27:/ ls -l dev/ubi0*
crw------- 33561600 dev/ubi0.root
c--------- 0 dev/ubi0
barebox@Phytec phyCORE-i.MX27:/ dhcp
phy0: Link is up - 100/Full
T T DHCP client bound to address 192.168.24.195
barebox@Phytec phyCORE-i.MX27:/ tftp ubi.img /dev/ubi0.root
TFTP from server 192.168.23.2 ('ubi.img' -> '/dev/ubi0.root')
#################################################################
############################
barebox@Phytec phyCORE-i.MX27:/ ubidetach dev/nand0.root
removing ubi0
UBI: mtd0 is detached from ubi0
barebox@Phytec phyCORE-i.MX27:/ ubiattach dev/nand0.root
UBI: attaching mtd0 to ubi0
UBI: physical eraseblock size: 16384 bytes (16 KiB)
UBI: logical eraseblock size: 15360 bytes
UBI: smallest flash I/O unit: 512
UBI: VID header offset: 512 (aligned 512)
UBI: data offset: 1024
registering /dev/ubi0
registering root as /dev/ubi0.root
UBI: attached mtd0 to ubi0
UBI: MTD device name: "nand0.root"
UBI: MTD device size: 61 MiB
UBI: number of good PEBs: 3940
UBI: number of bad PEBs: 4
UBI: max. allowed volumes: 89
UBI: wear-leveling threshold: 4096
UBI: number of internal volumes: 1
UBI: number of user volumes: 1
UBI: available PEBs: 1712
UBI: total number of reserved PEBs: 2228
UBI: number of PEBs reserved for bad PEB handling: 39
UBI: max/mean erase counter: 30/1
barebox@Phytec phyCORE-i.MX27:/
Unfortunately UBI is really huge (about 40k) but it comes in quite handy when
working with UBI. While creating UBIFS images is simple, creating UBI images
which fit onto the device is a pain.
Sascha
The following changes since commit a398a920b6847775c255e2a783c9562bd7227e43:
trivial: fix typos concerning "instead" (2010-07-05 08:27:28 +0200)
are available in the git repository at:
git://git.pengutronix.de/git/barebox ubi
Sascha Hauer (12):
crc32: activate crc32_no_comp (needed for jffs2 and UBI)
move drivers/nand to drivers/mtd/nand
add rbtree support (needed for ubi)
add partition mtd support
cfi_flash: Do not typedef struct flash_info
cfi_flash: Do not print debug info while erasing
cfi_flash: Add mtd partition support for UBI
devfs: only check for ioctl function when needed
include stuff missing for ubi
add ubi support from u-boot. Just enough to compile and scan
barebox ubi changes
Add UBI commands: ubiattach, ubidetach, ubimkvol, ubirmvol
commands/Kconfig | 6 +
commands/Makefile | 1 +
commands/ubi.c | 129 +++
drivers/Kconfig | 2 +-
drivers/Makefile | 2 +-
drivers/mtd/Kconfig | 9 +
drivers/mtd/Makefile | 3 +
drivers/{ => mtd}/nand/Kconfig | 2 +-
drivers/{ => mtd}/nand/Makefile | 0
drivers/{ => mtd}/nand/atmel_nand.c | 0
drivers/{ => mtd}/nand/atmel_nand_ecc.h | 0
drivers/{ => mtd}/nand/diskonchip.c | 0
drivers/{ => mtd}/nand/nand.c | 2 +
drivers/{ => mtd}/nand/nand_base.c | 0
drivers/{ => mtd}/nand/nand_bbt.c | 0
drivers/{ => mtd}/nand/nand_ecc.c | 0
drivers/{ => mtd}/nand/nand_ids.c | 0
drivers/{ => mtd}/nand/nand_imx.c | 0
drivers/{ => mtd}/nand/nand_omap_gpmc.c | 0
drivers/{ => mtd}/nand/nand_s3c2410.c | 0
drivers/{ => mtd}/nand/nand_util.c | 0
drivers/mtd/partition.c | 143 +++
drivers/mtd/ubi/Kconfig | 6 +
drivers/mtd/ubi/Makefile | 3 +
drivers/mtd/ubi/build.c | 1059 +++++++++++++++++++
drivers/mtd/ubi/cdev.c | 238 +++++
drivers/mtd/ubi/crc32defs.h | 32 +
drivers/mtd/ubi/debug.c | 192 ++++
drivers/mtd/ubi/debug.h | 152 +++
drivers/mtd/ubi/eba.c | 1256 +++++++++++++++++++++++
drivers/mtd/ubi/io.c | 1274 +++++++++++++++++++++++
drivers/mtd/ubi/kapi.c | 638 ++++++++++++
drivers/mtd/ubi/misc.c | 106 ++
drivers/mtd/ubi/scan.c | 1362 +++++++++++++++++++++++++
drivers/mtd/ubi/scan.h | 165 +++
drivers/mtd/ubi/ubi-barebox.h | 191 ++++
drivers/mtd/ubi/ubi-media.h | 372 +++++++
drivers/mtd/ubi/ubi.h | 648 ++++++++++++
drivers/mtd/ubi/upd.c | 445 ++++++++
drivers/mtd/ubi/vmt.c | 866 ++++++++++++++++
drivers/mtd/ubi/vtbl.c | 837 +++++++++++++++
drivers/mtd/ubi/wl.c | 1675 +++++++++++++++++++++++++++++++
drivers/nor/cfi_flash.c | 143 +++-
drivers/nor/cfi_flash.h | 55 +-
drivers/nor/cfi_flash_amd.c | 14 +-
drivers/nor/cfi_flash_intel.c | 12 +-
fs/Kconfig | 3 +
fs/devfs.c | 46 +-
include/common.h | 4 +-
include/driver.h | 1 +
include/linux/mtd/mtd-abi.h | 1 +
include/linux/mtd/mtd.h | 13 +
include/linux/mtd/ubi.h | 186 ++++
include/linux/rbtree.h | 160 +++
include/mtd/ubi-user.h | 300 ++++++
lib/Makefile | 1 +
lib/crc32.c | 11 +-
lib/rbtree.c | 389 +++++++
58 files changed, 13072 insertions(+), 83 deletions(-)
create mode 100644 commands/ubi.c
create mode 100644 drivers/mtd/Kconfig
create mode 100644 drivers/mtd/Makefile
rename drivers/{ => mtd}/nand/Kconfig (98%)
rename drivers/{ => mtd}/nand/Makefile (100%)
rename drivers/{ => mtd}/nand/atmel_nand.c (100%)
rename drivers/{ => mtd}/nand/atmel_nand_ecc.h (100%)
rename drivers/{ => mtd}/nand/diskonchip.c (100%)
rename drivers/{ => mtd}/nand/nand.c (99%)
rename drivers/{ => mtd}/nand/nand_base.c (100%)
rename drivers/{ => mtd}/nand/nand_bbt.c (100%)
rename drivers/{ => mtd}/nand/nand_ecc.c (100%)
rename drivers/{ => mtd}/nand/nand_ids.c (100%)
rename drivers/{ => mtd}/nand/nand_imx.c (100%)
rename drivers/{ => mtd}/nand/nand_omap_gpmc.c (100%)
rename drivers/{ => mtd}/nand/nand_s3c2410.c (100%)
rename drivers/{ => mtd}/nand/nand_util.c (100%)
create mode 100644 drivers/mtd/partition.c
create mode 100644 drivers/mtd/ubi/Kconfig
create mode 100644 drivers/mtd/ubi/Makefile
create mode 100644 drivers/mtd/ubi/build.c
create mode 100644 drivers/mtd/ubi/cdev.c
create mode 100644 drivers/mtd/ubi/crc32defs.h
create mode 100644 drivers/mtd/ubi/debug.c
create mode 100644 drivers/mtd/ubi/debug.h
create mode 100644 drivers/mtd/ubi/eba.c
create mode 100644 drivers/mtd/ubi/io.c
create mode 100644 drivers/mtd/ubi/kapi.c
create mode 100644 drivers/mtd/ubi/misc.c
create mode 100644 drivers/mtd/ubi/scan.c
create mode 100644 drivers/mtd/ubi/scan.h
create mode 100644 drivers/mtd/ubi/ubi-barebox.h
create mode 100644 drivers/mtd/ubi/ubi-media.h
create mode 100644 drivers/mtd/ubi/ubi.h
create mode 100644 drivers/mtd/ubi/upd.c
create mode 100644 drivers/mtd/ubi/vmt.c
create mode 100644 drivers/mtd/ubi/vtbl.c
create mode 100644 drivers/mtd/ubi/wl.c
create mode 100644 include/linux/mtd/ubi.h
create mode 100644 include/linux/rbtree.h
create mode 100644 include/mtd/ubi-user.h
create mode 100644 lib/rbtree.c
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 01/12] crc32: activate crc32_no_comp (needed for jffs2 and UBI)
2010-07-05 13:16 UBI support Sascha Hauer
@ 2010-07-05 13:16 ` Sascha Hauer
2010-07-05 13:16 ` [PATCH 02/12] move drivers/nand to drivers/mtd/nand Sascha Hauer
` (12 subsequent siblings)
13 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
include/common.h | 4 ++--
lib/crc32.c | 11 ++++++-----
2 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/include/common.h b/include/common.h
index 319535b..0edc778 100644
--- a/include/common.h
+++ b/include/common.h
@@ -109,8 +109,8 @@ unsigned long long simple_strtoull(const char *cp,char **endp,unsigned int base)
long simple_strtol(const char *cp,char **endp,unsigned int base);
/* lib_generic/crc32.c */
-ulong crc32 (ulong, const unsigned char *, uint);
-ulong crc32_no_comp (ulong, const unsigned char *, uint);
+uint32_t crc32(uint32_t, const void*, unsigned int);
+uint32_t crc32_no_comp(uint32_t, const void*, unsigned int);
/* common/console.c */
int ctrlc (void);
diff --git a/lib/crc32.c b/lib/crc32.c
index be35366..3481782 100644
--- a/lib/crc32.c
+++ b/lib/crc32.c
@@ -132,8 +132,10 @@ static const ulong crc_table[256] = {
#define DO8(buf) DO4(buf); DO4(buf);
/* ========================================================================= */
-ulong crc32(ulong crc, const unsigned char *buf, uint len)
+uint32_t crc32(uint32_t crc, const void *_buf, unsigned int len)
{
+ const unsigned char *buf = _buf;
+
#ifdef CONFIG_DYNAMIC_CRC_TABLE
if (crc_table_empty)
make_crc_table();
@@ -153,13 +155,13 @@ ulong crc32(ulong crc, const unsigned char *buf, uint len)
EXPORT_SYMBOL(crc32);
#endif
-#if 0
-
/* No ones complement version. JFFS2 (and other things ?)
* don't use ones compliment in their CRC calculations.
*/
-uLong crc32_no_comp(uLong crc, const Bytef *buf, uint len)
+uint32_t crc32_no_comp(uint32_t crc, const void *_buf, unsigned int len)
{
+ const unsigned char *buf = _buf;
+
#ifdef CONFIG_DYNAMIC_CRC_TABLE
if (crc_table_empty)
make_crc_table();
@@ -176,4 +178,3 @@ uLong crc32_no_comp(uLong crc, const Bytef *buf, uint len)
return crc;
}
-#endif
--
1.7.1
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 02/12] move drivers/nand to drivers/mtd/nand
2010-07-05 13:16 UBI support Sascha Hauer
2010-07-05 13:16 ` [PATCH 01/12] crc32: activate crc32_no_comp (needed for jffs2 and UBI) Sascha Hauer
@ 2010-07-05 13:16 ` Sascha Hauer
2010-07-05 13:16 ` [PATCH 03/12] add rbtree support (needed for ubi) Sascha Hauer
` (11 subsequent siblings)
13 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
[-- Attachment #1: Type: text/plain, Size: 571342 bytes --]
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/Kconfig | 2 +-
drivers/Makefile | 2 +-
drivers/mtd/Kconfig | 8 +
drivers/mtd/Makefile | 1 +
drivers/mtd/nand/Kconfig | 109 ++
drivers/mtd/nand/Makefile | 12 +
drivers/mtd/nand/atmel_nand.c | 516 ++++++++
drivers/mtd/nand/atmel_nand_ecc.h | 39 +
drivers/mtd/nand/diskonchip.c | 1787 +++++++++++++++++++++++++
drivers/mtd/nand/nand.c | 247 ++++
drivers/mtd/nand/nand_base.c | 2648 +++++++++++++++++++++++++++++++++++++
drivers/mtd/nand/nand_bbt.c | 1224 +++++++++++++++++
drivers/mtd/nand/nand_ecc.c | 198 +++
drivers/mtd/nand/nand_ids.c | 153 +++
drivers/mtd/nand/nand_imx.c | 1210 +++++++++++++++++
drivers/mtd/nand/nand_omap_gpmc.c | 534 ++++++++
drivers/mtd/nand/nand_s3c2410.c | 525 ++++++++
drivers/mtd/nand/nand_util.c | 858 ++++++++++++
drivers/nand/Kconfig | 109 --
drivers/nand/Makefile | 12 -
drivers/nand/atmel_nand.c | 516 --------
drivers/nand/atmel_nand_ecc.h | 39 -
drivers/nand/diskonchip.c | 1787 -------------------------
drivers/nand/nand.c | 247 ----
drivers/nand/nand_base.c | 2648 -------------------------------------
drivers/nand/nand_bbt.c | 1224 -----------------
drivers/nand/nand_ecc.c | 198 ---
drivers/nand/nand_ids.c | 153 ---
drivers/nand/nand_imx.c | 1210 -----------------
drivers/nand/nand_omap_gpmc.c | 534 --------
drivers/nand/nand_s3c2410.c | 525 --------
drivers/nand/nand_util.c | 858 ------------
32 files changed, 10071 insertions(+), 10062 deletions(-)
create mode 100644 drivers/mtd/Kconfig
create mode 100644 drivers/mtd/Makefile
create mode 100644 drivers/mtd/nand/Kconfig
create mode 100644 drivers/mtd/nand/Makefile
create mode 100644 drivers/mtd/nand/atmel_nand.c
create mode 100644 drivers/mtd/nand/atmel_nand_ecc.h
create mode 100644 drivers/mtd/nand/diskonchip.c
create mode 100644 drivers/mtd/nand/nand.c
create mode 100644 drivers/mtd/nand/nand_base.c
create mode 100644 drivers/mtd/nand/nand_bbt.c
create mode 100644 drivers/mtd/nand/nand_ecc.c
create mode 100644 drivers/mtd/nand/nand_ids.c
create mode 100644 drivers/mtd/nand/nand_imx.c
create mode 100644 drivers/mtd/nand/nand_omap_gpmc.c
create mode 100644 drivers/mtd/nand/nand_s3c2410.c
create mode 100644 drivers/mtd/nand/nand_util.c
delete mode 100644 drivers/nand/Kconfig
delete mode 100644 drivers/nand/Makefile
delete mode 100644 drivers/nand/atmel_nand.c
delete mode 100644 drivers/nand/atmel_nand_ecc.h
delete mode 100644 drivers/nand/diskonchip.c
delete mode 100644 drivers/nand/nand.c
delete mode 100644 drivers/nand/nand_base.c
delete mode 100644 drivers/nand/nand_bbt.c
delete mode 100644 drivers/nand/nand_ecc.c
delete mode 100644 drivers/nand/nand_ids.c
delete mode 100644 drivers/nand/nand_imx.c
delete mode 100644 drivers/nand/nand_omap_gpmc.c
delete mode 100644 drivers/nand/nand_s3c2410.c
delete mode 100644 drivers/nand/nand_util.c
diff --git a/drivers/Kconfig b/drivers/Kconfig
index bf559c4..ae9efce 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -5,7 +5,7 @@ source "drivers/net/Kconfig"
source "drivers/spi/Kconfig"
source "drivers/i2c/Kconfig"
source "drivers/nor/Kconfig"
-source "drivers/nand/Kconfig"
+source "drivers/mtd/Kconfig"
source "drivers/ata/Kconfig"
source "drivers/usb/Kconfig"
source "drivers/video/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index 7bae6ff..bce68bc 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -1,6 +1,6 @@
obj-y += net/
obj-y += serial/
-obj-y += nand/
+obj-y += mtd/
obj-y += nor/
obj-y += usb/
obj-$(CONFIG_ATA) += ata/
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
new file mode 100644
index 0000000..53183fc
--- /dev/null
+++ b/drivers/mtd/Kconfig
@@ -0,0 +1,8 @@
+menuconfig MTD
+ bool "Memory Technology Device (MTD) support"
+
+if MTD
+
+source "drivers/mtd/nand/Kconfig"
+
+endif
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
new file mode 100644
index 0000000..87ee6f4
--- /dev/null
+++ b/drivers/mtd/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_NAND) += nand/
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
new file mode 100644
index 0000000..e0d9d0d
--- /dev/null
+++ b/drivers/mtd/nand/Kconfig
@@ -0,0 +1,109 @@
+menuconfig NAND
+ bool "NAND support "
+ select MTD_NAND_IDS
+ help
+ This enables support for accessing all type of NAND flash
+ devices. For further information see
+ <http://www.linux-mtd.infradead.org/doc/nand.html>.
+
+if NAND
+
+config NAND_IMX
+ bool
+ prompt "i.MX NAND driver"
+ depends on ARCH_IMX21 || ARCH_IMX27 || ARCH_IMX31 || ARCH_IMX35 || ARCH_IMX25
+
+config NAND_IMX_BOOT
+ bool
+ prompt "Support Starting barebox from NAND"
+ depends on NAND_IMX || NAND_IMX_V2
+
+config NAND_OMAP_GPMC
+ tristate "NAND Flash Support for GPMC based OMAP platforms"
+ depends on ((ARCH_OMAP2 || ARCH_OMAP3) && GPMC)
+ help
+ Support for NAND flash using GPMC. GPMC is a common memory
+ interface found on Texas Instrument's OMAP platforms
+
+config NAND_OMAP_GPMC_HWECC
+ bool "The Hardware ECC support"
+ depends on NAND && NAND_OMAP_GPMC
+ default n
+ help
+ The ECC compuatation for the data to be written/read can be either by
+ software or omap has Hw ecc engine which calculates it.
+
+config NAND_ATMEL
+ bool
+ prompt "Atmel (AT91SAM9xxx) NAND driver"
+ depends on ARCH_AT91
+
+config NAND_S3C24X0
+ bool
+ prompt "Samsung S3C24X0 NAND driver"
+ depends on ARCH_S3C24xx
+ help
+ Add support for processor's NAND device controller.
+
+config MTD_NAND_VERIFY_WRITE
+ bool "Verify NAND page writes"
+ help
+ This adds an extra check when data is written to the flash. The
+ NAND flash device internally checks only bits transitioning
+ from 1 to 0. There is a rare possibility that even though the
+ device thinks the write was successful, a bit could have been
+ flipped accidentally due to device wear or something else.
+
+config MTD_NAND_ECC_SMC
+ bool "NAND ECC Smart Media byte order"
+ default n
+ help
+ Software ECC according to the Smart Media Specification.
+ The original Linux implementation had byte 0 and 1 swapped.
+
+config MTD_NAND_MUSEUM_IDS
+ bool "Enable chip ids for obsolete ancient NAND devices"
+ depends on MTD_NAND
+ default n
+ help
+ Enable this option only when your board has first generation
+ NAND chips (page size 256 byte, erase size 4-8KiB). The IDs
+ of these chips were reused by later, larger chips.
+
+config MTD_NAND_IDS
+ tristate
+
+config MTD_NAND_DISKONCHIP
+ tristate "DiskOnChip 2000, Millennium and Millennium Plus"
+ depends on EXPERIMENTAL && BROKEN
+ help
+ This is a reimplementation of M-Systems DiskOnChip 2000,
+ Millennium and Millennium Plus as a standard NAND device driver,
+ as opposed to the earlier self-contained MTD device drivers.
+ This should enable, among other things, proper JFFS2 operation on
+ these devices.
+
+config MTD_NAND_DISKONCHIP_BBTWRITE
+ bool "Allow BBT writes on DiskOnChip Millennium and 2000TSOP"
+ depends on MTD_NAND_DISKONCHIP
+ help
+ On DiskOnChip devices shipped with the INFTL filesystem (Millennium
+ and 2000 TSOP/Alon), Linux reserves some space at the end of the
+ device for the Bad Block Table (BBT). If you have existing INFTL
+ data on your device (created by non-Linux tools such as M-Systems'
+ DOS drivers), your data might overlap the area Linux wants to use for
+ the BBT. If this is a concern for you, leave this option disabled and
+ Linux will not write BBT data into this area.
+ The downside of leaving this option disabled is that if bad blocks
+ are detected by Linux, they will not be recorded in the BBT, which
+ could cause future problems.
+ Once you enable this option, new filesystems (INFTL or others, created
+ in Linux or other operating systems) will not use the reserved area.
+ The only reason not to enable this option is to prevent damage to
+ preexisting filesystems.
+ Even if you leave this disabled, you can enable BBT writes at module
+ load time (assuming you build diskonchip as a module) with the module
+ parameter "inftl_bbt_write=1".
+
+
+endif
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
new file mode 100644
index 0000000..73f7346
--- /dev/null
+++ b/drivers/mtd/nand/Makefile
@@ -0,0 +1,12 @@
+
+# Generic NAND options
+obj-$(CONFIG_NAND) += nand.o nand_ecc.o
+obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.o
+obj-$(CONFIG_NAND) += nand_base.o nand_bbt.o
+
+obj-$(CONFIG_MTD_NAND_DISKONCHIP) += diskonchip.o
+obj-$(CONFIG_NAND_IMX) += nand_imx.o
+obj-$(CONFIG_NAND_OMAP_GPMC) += nand_omap_gpmc.o
+obj-$(CONFIG_NAND_ATMEL) += atmel_nand.o
+obj-$(CONFIG_NAND_S3C24X0) += nand_s3c2410.o
+#obj-$(CONFIG_NAND) += nand_util.o
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
new file mode 100644
index 0000000..c3669e5
--- /dev/null
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -0,0 +1,516 @@
+/*
+ * Copyright (C) 2003 Rick Bronson
+ *
+ * Derived from drivers/mtd/nand/autcpu12.c
+ * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
+ *
+ * Derived from drivers/mtd/spia.c
+ * Copyright (C) 2000 Steven J. Hill (sjhill@cotw.com)
+ *
+ *
+ * Add Hardware ECC support for AT91SAM9260 / AT91SAM9263
+ * Richard Genoud (richard.genoud@gmail.com), Adeneo Copyright (C) 2007
+ *
+ * Derived from Das barebox source code
+ * (barebox-1.1.5/board/atmel/at91sam9263ek/nand.c)
+ * (C) Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <common.h>
+#include <driver.h>
+#include <malloc.h>
+#include <init.h>
+#include <gpio.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+
+#include <asm/io.h>
+#include <mach/board.h>
+
+#include <errno.h>
+
+#ifdef CONFIG_MTD_NAND_ATMEL_ECC_HW
+#define hard_ecc 1
+#else
+#define hard_ecc 0
+#endif
+
+#ifdef CONFIG_MTD_NAND_ATMEL_ECC_NONE
+#define no_ecc 1
+#else
+#define no_ecc 0
+#endif
+
+/* Register access macros */
+#define ecc_readl(add, reg) \
+ readl(add + ATMEL_ECC_##reg)
+#define ecc_writel(add, reg, value) \
+ writel((value), add + ATMEL_ECC_##reg)
+
+#include "atmel_nand_ecc.h" /* Hardware ECC registers */
+
+/* oob layout for large page size
+ * bad block info is on bytes 0 and 1
+ * the bytes have to be consecutives to avoid
+ * several NAND_CMD_RNDOUT during read
+ */
+static struct nand_ecclayout atmel_oobinfo_large = {
+ .eccbytes = 4,
+ .eccpos = {60, 61, 62, 63},
+ .oobfree = {
+ {2, 58}
+ },
+};
+
+/* oob layout for small page size
+ * bad block info is on bytes 4 and 5
+ * the bytes have to be consecutives to avoid
+ * several NAND_CMD_RNDOUT during read
+ */
+static struct nand_ecclayout atmel_oobinfo_small = {
+ .eccbytes = 4,
+ .eccpos = {0, 1, 2, 3},
+ .oobfree = {
+ {6, 10}
+ },
+};
+
+struct atmel_nand_host {
+ struct nand_chip nand_chip;
+ struct mtd_info mtd;
+ void __iomem *io_base;
+ struct atmel_nand_data *board;
+ struct device_d *dev;
+ void __iomem *ecc;
+};
+
+/*
+ * Enable NAND.
+ */
+static void atmel_nand_enable(struct atmel_nand_host *host)
+{
+ if (host->board->enable_pin)
+ gpio_set_value(host->board->enable_pin, 0);
+}
+
+/*
+ * Disable NAND.
+ */
+static void atmel_nand_disable(struct atmel_nand_host *host)
+{
+ if (host->board->enable_pin)
+ gpio_set_value(host->board->enable_pin, 1);
+}
+
+/*
+ * Hardware specific access to control-lines
+ */
+static void atmel_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct atmel_nand_host *host = nand_chip->priv;
+
+ if (ctrl & NAND_CTRL_CHANGE) {
+ if (ctrl & NAND_NCE)
+ atmel_nand_enable(host);
+ else
+ atmel_nand_disable(host);
+ }
+ if (cmd == NAND_CMD_NONE)
+ return;
+
+ if (ctrl & NAND_CLE)
+ writeb(cmd, host->io_base + (1 << host->board->cle));
+ else
+ writeb(cmd, host->io_base + (1 << host->board->ale));
+}
+
+/*
+ * Read the Device Ready pin.
+ */
+static int atmel_nand_device_ready(struct mtd_info *mtd)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct atmel_nand_host *host = nand_chip->priv;
+
+ return gpio_get_value(host->board->rdy_pin);
+}
+
+/*
+ * Minimal-overhead PIO for data access.
+ */
+static void atmel_read_buf(struct mtd_info *mtd, u8 *buf, int len)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+
+ readsb(nand_chip->IO_ADDR_R, buf, len);
+}
+
+static void atmel_read_buf16(struct mtd_info *mtd, u8 *buf, int len)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+
+ readsw(nand_chip->IO_ADDR_R, buf, len / 2);
+}
+
+static void atmel_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+
+ writesb(nand_chip->IO_ADDR_W, buf, len);
+}
+
+static void atmel_write_buf16(struct mtd_info *mtd, const u8 *buf, int len)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+
+ writesw(nand_chip->IO_ADDR_W, buf, len / 2);
+}
+
+/*
+ * Calculate HW ECC
+ *
+ * function called after a write
+ *
+ * mtd: MTD block structure
+ * dat: raw data (unused)
+ * ecc_code: buffer for ECC
+ */
+static int atmel_nand_calculate(struct mtd_info *mtd,
+ const u_char *dat, unsigned char *ecc_code)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct atmel_nand_host *host = nand_chip->priv;
+/* uint32_t *eccpos = nand_chip->ecc.layout->eccpos; */
+ unsigned int ecc_value;
+
+ /* get the first 2 ECC bytes */
+ ecc_value = ecc_readl(host->ecc, PR);
+
+ ecc_code[0] = ecc_value & 0xFF;
+ ecc_code[1] = (ecc_value >> 8) & 0xFF;
+
+ /* get the last 2 ECC bytes */
+ ecc_value = ecc_readl(host->ecc, NPR) & ATMEL_ECC_NPARITY;
+
+ ecc_code[2] = ecc_value & 0xFF;
+ ecc_code[3] = (ecc_value >> 8) & 0xFF;
+
+ return 0;
+}
+
+/*
+ * HW ECC read page function
+ *
+ * mtd: mtd info structure
+ * chip: nand chip info structure
+ * buf: buffer to store read data
+ */
+static int atmel_nand_read_page(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t *buf)
+{
+ int eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ uint32_t *eccpos = chip->ecc.layout->eccpos;
+ uint8_t *p = buf;
+ uint8_t *oob = chip->oob_poi;
+ uint8_t *ecc_pos;
+ int stat;
+
+ /*
+ * Errata: ALE is incorrectly wired up to the ECC controller
+ * on the AP7000, so it will include the address cycles in the
+ * ECC calculation.
+ *
+ * Workaround: Reset the parity registers before reading the
+ * actual data.
+ */
+#if 0
+ if (cpu_is_at32ap7000()) {
+ struct atmel_nand_host *host = chip->priv;
+ ecc_writel(host->ecc, CR, ATMEL_ECC_RST);
+ }
+#endif
+
+ /* read the page */
+ chip->read_buf(mtd, p, eccsize);
+
+ /* move to ECC position if needed */
+ if (eccpos[0] != 0) {
+ /* This only works on large pages
+ * because the ECC controller waits for
+ * NAND_CMD_RNDOUTSTART after the
+ * NAND_CMD_RNDOUT.
+ * anyway, for small pages, the eccpos[0] == 0
+ */
+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT,
+ mtd->writesize + eccpos[0], -1);
+ }
+
+ /* the ECC controller needs to read the ECC just after the data */
+ ecc_pos = oob + eccpos[0];
+ chip->read_buf(mtd, ecc_pos, eccbytes);
+
+ /* check if there's an error */
+ stat = chip->ecc.correct(mtd, p, oob, NULL);
+
+ if (stat < 0)
+ mtd->ecc_stats.failed++;
+ else
+ mtd->ecc_stats.corrected += stat;
+
+ /* get back to oob start (end of page) */
+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT, mtd->writesize, -1);
+
+ /* read the oob */
+ chip->read_buf(mtd, oob, mtd->oobsize);
+
+ return 0;
+}
+
+/*
+ * HW ECC Correction
+ *
+ * function called after a read
+ *
+ * mtd: MTD block structure
+ * dat: raw data read from the chip
+ * read_ecc: ECC from the chip (unused)
+ * isnull: unused
+ *
+ * Detect and correct a 1 bit error for a page
+ */
+static int atmel_nand_correct(struct mtd_info *mtd, u_char *dat,
+ u_char *read_ecc, u_char *isnull)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct atmel_nand_host *host = nand_chip->priv;
+ unsigned int ecc_status;
+ unsigned int ecc_word, ecc_bit;
+
+ /* get the status from the Status Register */
+ ecc_status = ecc_readl(host->ecc, SR);
+
+ /* if there's no error */
+ if (likely(!(ecc_status & ATMEL_ECC_RECERR)))
+ return 0;
+
+ /* get error bit offset (4 bits) */
+ ecc_bit = ecc_readl(host->ecc, PR) & ATMEL_ECC_BITADDR;
+ /* get word address (12 bits) */
+ ecc_word = ecc_readl(host->ecc, PR) & ATMEL_ECC_WORDADDR;
+ ecc_word >>= 4;
+
+ /* if there are multiple errors */
+ if (ecc_status & ATMEL_ECC_MULERR) {
+ /* check if it is a freshly erased block
+ * (filled with 0xff) */
+ if ((ecc_bit == ATMEL_ECC_BITADDR)
+ && (ecc_word == (ATMEL_ECC_WORDADDR >> 4))) {
+ /* the block has just been erased, return OK */
+ return 0;
+ }
+ /* it doesn't seems to be a freshly
+ * erased block.
+ * We can't correct so many errors */
+ dev_dbg(host->dev, "atmel_nand : multiple errors detected."
+ " Unable to correct.\n");
+ return -EIO;
+ }
+
+ /* if there's a single bit error : we can correct it */
+ if (ecc_status & ATMEL_ECC_ECCERR) {
+ /* there's nothing much to do here.
+ * the bit error is on the ECC itself.
+ */
+ dev_dbg(host->dev, "atmel_nand : one bit error on ECC code."
+ " Nothing to correct\n");
+ return 0;
+ }
+
+ dev_dbg(host->dev, "atmel_nand : one bit error on data."
+ " (word offset in the page :"
+ " 0x%x bit offset : 0x%x)\n",
+ ecc_word, ecc_bit);
+ /* correct the error */
+ if (nand_chip->options & NAND_BUSWIDTH_16) {
+ /* 16 bits words */
+ ((unsigned short *) dat)[ecc_word] ^= (1 << ecc_bit);
+ } else {
+ /* 8 bits words */
+ dat[ecc_word] ^= (1 << ecc_bit);
+ }
+ dev_dbg(host->dev, "atmel_nand : error corrected\n");
+ return 1;
+}
+
+/*
+ * Enable HW ECC : unused on most chips
+ */
+static void atmel_nand_hwctl(struct mtd_info *mtd, int mode)
+{
+#if 0
+ if (cpu_is_at32ap7000()) {
+ struct nand_chip *nand_chip = mtd->priv;
+ struct atmel_nand_host *host = nand_chip->priv;
+ ecc_writel(host->ecc, CR, ATMEL_ECC_RST);
+ }
+#endif
+}
+
+/*
+ * Probe for the NAND device.
+ */
+static int __init atmel_nand_probe(struct device_d *dev)
+{
+ struct atmel_nand_data *pdata = dev->platform_data;
+ struct atmel_nand_host *host;
+ struct mtd_info *mtd;
+ struct nand_chip *nand_chip;
+ int res = 0;
+
+ /* Allocate memory for the device structure (and zero it) */
+ host = kzalloc(sizeof(struct atmel_nand_host), GFP_KERNEL);
+ if (!host)
+ return -ENOMEM;
+
+ host->io_base = (void __iomem *)dev->map_base;
+
+ mtd = &host->mtd;
+ nand_chip = &host->nand_chip;
+ host->board = pdata;
+ host->dev = dev;
+
+ nand_chip->priv = host; /* link the private data structures */
+ mtd->priv = nand_chip;
+
+ /* Set address of NAND IO lines */
+ nand_chip->IO_ADDR_R = host->io_base;
+ nand_chip->IO_ADDR_W = host->io_base;
+ nand_chip->cmd_ctrl = atmel_nand_cmd_ctrl;
+
+ if (host->board->rdy_pin)
+ nand_chip->dev_ready = atmel_nand_device_ready;
+
+ nand_chip->ecc.mode = pdata->ecc_mode;
+
+ if (pdata->ecc_mode == NAND_ECC_HW) {
+ if (!pdata->ecc_base)
+ return -ENODEV;
+
+ host->ecc = pdata->ecc_base;
+
+ nand_chip->ecc.mode = NAND_ECC_HW;
+ nand_chip->ecc.calculate = atmel_nand_calculate;
+ nand_chip->ecc.correct = atmel_nand_correct;
+ nand_chip->ecc.hwctl = atmel_nand_hwctl;
+ nand_chip->ecc.read_page = atmel_nand_read_page;
+ nand_chip->ecc.bytes = 4;
+ }
+
+ nand_chip->chip_delay = 20; /* 20us command delay time */
+
+ if (host->board->bus_width_16) { /* 16-bit bus width */
+ nand_chip->options |= NAND_BUSWIDTH_16;
+ nand_chip->read_buf = atmel_read_buf16;
+ nand_chip->write_buf = atmel_write_buf16;
+ } else {
+ nand_chip->read_buf = atmel_read_buf;
+ nand_chip->write_buf = atmel_write_buf;
+ }
+
+ atmel_nand_enable(host);
+
+ if (host->board->det_pin) {
+ if (gpio_get_value(host->board->det_pin)) {
+ printk("No SmartMedia card inserted.\n");
+ res = ENXIO;
+ goto err_no_card;
+ }
+ }
+
+ /* first scan to find the device and get the page size */
+ if (nand_scan_ident(mtd, 1)) {
+ res = -ENXIO;
+ goto err_scan_ident;
+ }
+
+ if (nand_chip->ecc.mode == NAND_ECC_HW) {
+ /* ECC is calculated for the whole page (1 step) */
+ nand_chip->ecc.size = mtd->writesize;
+
+ /* set ECC page size and oob layout */
+ switch (mtd->writesize) {
+ case 512:
+ nand_chip->ecc.layout = &atmel_oobinfo_small;
+ ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_528);
+ break;
+ case 1024:
+ nand_chip->ecc.layout = &atmel_oobinfo_large;
+ ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_1056);
+ break;
+ case 2048:
+ nand_chip->ecc.layout = &atmel_oobinfo_large;
+ ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_2112);
+ break;
+ case 4096:
+ nand_chip->ecc.layout = &atmel_oobinfo_large;
+ ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_4224);
+ break;
+ default:
+ /* page size not handled by HW ECC */
+ /* switching back to soft ECC */
+ nand_chip->ecc.mode = NAND_ECC_SOFT;
+ nand_chip->ecc.calculate = NULL;
+ nand_chip->ecc.correct = NULL;
+ nand_chip->ecc.hwctl = NULL;
+ nand_chip->ecc.read_page = NULL;
+ nand_chip->ecc.postpad = 0;
+ nand_chip->ecc.prepad = 0;
+ nand_chip->ecc.bytes = 0;
+ break;
+ }
+ }
+
+ /* second phase scan */
+ if (nand_scan_tail(mtd)) {
+ res = -ENXIO;
+ goto err_scan_tail;
+ }
+
+ add_mtd_device(mtd);
+
+ if (!res)
+ return res;
+
+ nand_release(mtd);
+err_scan_tail:
+err_scan_ident:
+err_no_card:
+ atmel_nand_disable(host);
+ kfree(host);
+ return res;
+}
+
+static struct driver_d atmel_nand_driver = {
+ .name = "atmel_nand",
+ .probe = atmel_nand_probe,
+};
+
+static int __init atmel_nand_init(void)
+{
+ return register_driver(&atmel_nand_driver);
+}
+
+device_initcall(atmel_nand_init);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Rick Bronson");
+MODULE_DESCRIPTION("NAND/SmartMedia driver for AT91 / AVR32");
diff --git a/drivers/mtd/nand/atmel_nand_ecc.h b/drivers/mtd/nand/atmel_nand_ecc.h
new file mode 100644
index 0000000..578c776
--- /dev/null
+++ b/drivers/mtd/nand/atmel_nand_ecc.h
@@ -0,0 +1,39 @@
+/*
+ * Error Corrected Code Controller (ECC) - System peripherals regsters.
+ * Based on AT91SAM9260 datasheet revision B.
+ *
+ * Copyright (C) 2007 Andrew Victor
+ * Copyright (C) 2007 Atmel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef ATMEL_NAND_ECC_H
+#define ATMEL_NAND_ECC_H
+
+#define ATMEL_ECC_CR 0x00 /* Control register */
+#define ATMEL_ECC_RST (1 << 0) /* Reset parity */
+
+#define ATMEL_ECC_MR 0x04 /* Mode register */
+#define ATMEL_ECC_PAGESIZE (3 << 0) /* Page Size */
+#define ATMEL_ECC_PAGESIZE_528 (0)
+#define ATMEL_ECC_PAGESIZE_1056 (1)
+#define ATMEL_ECC_PAGESIZE_2112 (2)
+#define ATMEL_ECC_PAGESIZE_4224 (3)
+
+#define ATMEL_ECC_SR 0x08 /* Status register */
+#define ATMEL_ECC_RECERR (1 << 0) /* Recoverable Error */
+#define ATMEL_ECC_ECCERR (1 << 1) /* ECC Single Bit Error */
+#define ATMEL_ECC_MULERR (1 << 2) /* Multiple Errors */
+
+#define ATMEL_ECC_PR 0x0c /* Parity register */
+#define ATMEL_ECC_BITADDR (0xf << 0) /* Bit Error Address */
+#define ATMEL_ECC_WORDADDR (0xfff << 4) /* Word Error Address */
+
+#define ATMEL_ECC_NPR 0x10 /* NParity register */
+#define ATMEL_ECC_NPARITY (0xffff << 0) /* NParity */
+
+#endif
diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c
new file mode 100644
index 0000000..e762524
--- /dev/null
+++ b/drivers/mtd/nand/diskonchip.c
@@ -0,0 +1,1787 @@
+/*
+ * drivers/mtd/nand/diskonchip.c
+ *
+ * (C) 2003 Red Hat, Inc.
+ * (C) 2004 Dan Brown <dan_brown@ieee.org>
+ * (C) 2004 Kalev Lember <kalev@smartlink.ee>
+ *
+ * Author: David Woodhouse <dwmw2@infradead.org>
+ * Additional Diskonchip 2000 and Millennium support by Dan Brown <dan_brown@ieee.org>
+ * Diskonchip Millennium Plus support by Kalev Lember <kalev@smartlink.ee>
+ *
+ * Error correction code lifted from the old docecc code
+ * Author: Fabrice Bellard (fabrice.bellard@netgem.com)
+ * Copyright (C) 2000 Netgem S.A.
+ * converted to the generic Reed-Solomon library by Thomas Gleixner <tglx@linutronix.de>
+ *
+ * Interface to generic NAND code for M-Systems DiskOnChip devices
+ *
+ * $Id: diskonchip.c,v 1.45 2005/01/05 18:05:14 dwmw2 Exp $
+ */
+
+#include <common.h>
+
+#if !defined(CFG_NAND_LEGACY)
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/rslib.h>
+#include <linux/moduleparam.h>
+#include <asm/io.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/doc2000.h>
+#include <linux/mtd/compatmac.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/inftl.h>
+
+/* Where to look for the devices? */
+#ifndef CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS
+#define CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS 0
+#endif
+
+static unsigned long __initdata doc_locations[] = {
+#if defined (__alpha__) || defined(__i386__) || defined(__x86_64__)
+#ifdef CONFIG_MTD_DISKONCHIP_PROBE_HIGH
+ 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000,
+ 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000,
+ 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000,
+ 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000,
+ 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000,
+#else /* CONFIG_MTD_DOCPROBE_HIGH */
+ 0xc8000, 0xca000, 0xcc000, 0xce000,
+ 0xd0000, 0xd2000, 0xd4000, 0xd6000,
+ 0xd8000, 0xda000, 0xdc000, 0xde000,
+ 0xe0000, 0xe2000, 0xe4000, 0xe6000,
+ 0xe8000, 0xea000, 0xec000, 0xee000,
+#endif /* CONFIG_MTD_DOCPROBE_HIGH */
+#elif defined(__PPC__)
+ 0xe4000000,
+#elif defined(CONFIG_MOMENCO_OCELOT)
+ 0x2f000000,
+ 0xff000000,
+#elif defined(CONFIG_MOMENCO_OCELOT_G) || defined (CONFIG_MOMENCO_OCELOT_C)
+ 0xff000000,
+##else
+#warning Unknown architecture for DiskOnChip. No default probe locations defined
+#endif
+ 0xffffffff };
+
+static struct mtd_info *doclist = NULL;
+
+struct doc_priv {
+ void __iomem *virtadr;
+ unsigned long physadr;
+ u_char ChipID;
+ u_char CDSNControl;
+ int chips_per_floor; /* The number of chips detected on each floor */
+ int curfloor;
+ int curchip;
+ int mh0_page;
+ int mh1_page;
+ struct mtd_info *nextdoc;
+};
+
+/* Max number of eraseblocks to scan (from start of device) for the (I)NFTL
+ MediaHeader. The spec says to just keep going, I think, but that's just
+ silly. */
+#define MAX_MEDIAHEADER_SCAN 8
+
+/* This is the syndrome computed by the HW ecc generator upon reading an empty
+ page, one with all 0xff for data and stored ecc code. */
+static u_char empty_read_syndrome[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a };
+/* This is the ecc value computed by the HW ecc generator upon writing an empty
+ page, one with all 0xff for data. */
+static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 };
+
+#define INFTL_BBT_RESERVED_BLOCKS 4
+
+#define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32)
+#define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil)
+#define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k)
+
+static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd);
+static void doc200x_select_chip(struct mtd_info *mtd, int chip);
+
+static int debug=0;
+module_param(debug, int, 0);
+
+static int try_dword=1;
+module_param(try_dword, int, 0);
+
+static int no_ecc_failures=0;
+module_param(no_ecc_failures, int, 0);
+
+#ifdef CONFIG_MTD_PARTITIONS
+static int no_autopart=0;
+module_param(no_autopart, int, 0);
+#endif
+
+#ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE
+static int inftl_bbt_write=1;
+#else
+static int inftl_bbt_write=0;
+#endif
+module_param(inftl_bbt_write, int, 0);
+
+static unsigned long doc_config_location = CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS;
+module_param(doc_config_location, ulong, 0);
+MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip");
+
+
+/* Sector size for HW ECC */
+#define SECTOR_SIZE 512
+/* The sector bytes are packed into NB_DATA 10 bit words */
+#define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10)
+/* Number of roots */
+#define NROOTS 4
+/* First consective root */
+#define FCR 510
+/* Number of symbols */
+#define NN 1023
+
+/* the Reed Solomon control structure */
+static struct rs_control *rs_decoder;
+
+/*
+ * The HW decoder in the DoC ASIC's provides us a error syndrome,
+ * which we must convert to a standard syndrom usable by the generic
+ * Reed-Solomon library code.
+ *
+ * Fabrice Bellard figured this out in the old docecc code. I added
+ * some comments, improved a minor bit and converted it to make use
+ * of the generic Reed-Solomon libary. tglx
+ */
+static int doc_ecc_decode (struct rs_control *rs, uint8_t *data, uint8_t *ecc)
+{
+ int i, j, nerr, errpos[8];
+ uint8_t parity;
+ uint16_t ds[4], s[5], tmp, errval[8], syn[4];
+
+ /* Convert the ecc bytes into words */
+ ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8);
+ ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6);
+ ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4);
+ ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2);
+ parity = ecc[1];
+
+ /* Initialize the syndrom buffer */
+ for (i = 0; i < NROOTS; i++)
+ s[i] = ds[0];
+ /*
+ * Evaluate
+ * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0]
+ * where x = alpha^(FCR + i)
+ */
+ for(j = 1; j < NROOTS; j++) {
+ if(ds[j] == 0)
+ continue;
+ tmp = rs->index_of[ds[j]];
+ for(i = 0; i < NROOTS; i++)
+ s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)];
+ }
+
+ /* Calc s[i] = s[i] / alpha^(v + i) */
+ for (i = 0; i < NROOTS; i++) {
+ if (syn[i])
+ syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i));
+ }
+ /* Call the decoder library */
+ nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval);
+
+ /* Incorrectable errors ? */
+ if (nerr < 0)
+ return nerr;
+
+ /*
+ * Correct the errors. The bitpositions are a bit of magic,
+ * but they are given by the design of the de/encoder circuit
+ * in the DoC ASIC's.
+ */
+ for(i = 0;i < nerr; i++) {
+ int index, bitpos, pos = 1015 - errpos[i];
+ uint8_t val;
+ if (pos >= NB_DATA && pos < 1019)
+ continue;
+ if (pos < NB_DATA) {
+ /* extract bit position (MSB first) */
+ pos = 10 * (NB_DATA - 1 - pos) - 6;
+ /* now correct the following 10 bits. At most two bytes
+ can be modified since pos is even */
+ index = (pos >> 3) ^ 1;
+ bitpos = pos & 7;
+ if ((index >= 0 && index < SECTOR_SIZE) ||
+ index == (SECTOR_SIZE + 1)) {
+ val = (uint8_t) (errval[i] >> (2 + bitpos));
+ parity ^= val;
+ if (index < SECTOR_SIZE)
+ data[index] ^= val;
+ }
+ index = ((pos >> 3) + 1) ^ 1;
+ bitpos = (bitpos + 10) & 7;
+ if (bitpos == 0)
+ bitpos = 8;
+ if ((index >= 0 && index < SECTOR_SIZE) ||
+ index == (SECTOR_SIZE + 1)) {
+ val = (uint8_t)(errval[i] << (8 - bitpos));
+ parity ^= val;
+ if (index < SECTOR_SIZE)
+ data[index] ^= val;
+ }
+ }
+ }
+ /* If the parity is wrong, no rescue possible */
+ return parity ? -1 : nerr;
+}
+
+static void DoC_Delay(struct doc_priv *doc, unsigned short cycles)
+{
+ volatile char dummy;
+ int i;
+
+ for (i = 0; i < cycles; i++) {
+ if (DoC_is_Millennium(doc))
+ dummy = ReadDOC(doc->virtadr, NOP);
+ else if (DoC_is_MillenniumPlus(doc))
+ dummy = ReadDOC(doc->virtadr, Mplus_NOP);
+ else
+ dummy = ReadDOC(doc->virtadr, DOCStatus);
+ }
+
+}
+
+#define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1)
+
+/* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */
+static int _DoC_WaitReady(struct doc_priv *doc)
+{
+ void __iomem *docptr = doc->virtadr;
+ unsigned long timeo = jiffies + (HZ * 10);
+
+ if(debug) printk("_DoC_WaitReady...\n");
+ /* Out-of-line routine to wait for chip response */
+ if (DoC_is_MillenniumPlus(doc)) {
+ while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) {
+ if (time_after(jiffies, timeo)) {
+ printk("_DoC_WaitReady timed out.\n");
+ return -EIO;
+ }
+ udelay(1);
+ cond_resched();
+ }
+ } else {
+ while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) {
+ if (time_after(jiffies, timeo)) {
+ printk("_DoC_WaitReady timed out.\n");
+ return -EIO;
+ }
+ udelay(1);
+ cond_resched();
+ }
+ }
+
+ return 0;
+}
+
+static inline int DoC_WaitReady(struct doc_priv *doc)
+{
+ void __iomem *docptr = doc->virtadr;
+ int ret = 0;
+
+ if (DoC_is_MillenniumPlus(doc)) {
+ DoC_Delay(doc, 4);
+
+ if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK)
+ /* Call the out-of-line routine to wait */
+ ret = _DoC_WaitReady(doc);
+ } else {
+ DoC_Delay(doc, 4);
+
+ if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B))
+ /* Call the out-of-line routine to wait */
+ ret = _DoC_WaitReady(doc);
+ DoC_Delay(doc, 2);
+ }
+
+ if(debug) printk("DoC_WaitReady OK\n");
+ return ret;
+}
+
+static void doc2000_write_byte(struct mtd_info *mtd, u_char datum)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+
+ if(debug)printk("write_byte %02x\n", datum);
+ WriteDOC(datum, docptr, CDSNSlowIO);
+ WriteDOC(datum, docptr, 2k_CDSN_IO);
+}
+
+static u_char doc2000_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ u_char ret;
+
+ ReadDOC(docptr, CDSNSlowIO);
+ DoC_Delay(doc, 2);
+ ret = ReadDOC(docptr, 2k_CDSN_IO);
+ if (debug) printk("read_byte returns %02x\n", ret);
+ return ret;
+}
+
+static void doc2000_writebuf(struct mtd_info *mtd,
+ const u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int i;
+ if (debug)printk("writebuf of %d bytes: ", len);
+ for (i=0; i < len; i++) {
+ WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i);
+ if (debug && i < 16)
+ printk("%02x ", buf[i]);
+ }
+ if (debug) printk("\n");
+}
+
+static void doc2000_readbuf(struct mtd_info *mtd,
+ u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int i;
+
+ if (debug)printk("readbuf of %d bytes: ", len);
+
+ for (i=0; i < len; i++) {
+ buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i);
+ }
+}
+
+static void doc2000_readbuf_dword(struct mtd_info *mtd,
+ u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int i;
+
+ if (debug) printk("readbuf_dword of %d bytes: ", len);
+
+ if (unlikely((((unsigned long)buf)|len) & 3)) {
+ for (i=0; i < len; i++) {
+ *(uint8_t *)(&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i);
+ }
+ } else {
+ for (i=0; i < len; i+=4) {
+ *(uint32_t*)(&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i);
+ }
+ }
+}
+
+static int doc2000_verifybuf(struct mtd_info *mtd,
+ const u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int i;
+
+ for (i=0; i < len; i++)
+ if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO))
+ return -EFAULT;
+ return 0;
+}
+
+static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ uint16_t ret;
+
+ doc200x_select_chip(mtd, nr);
+ doc200x_hwcontrol(mtd, NAND_CTL_SETCLE);
+ this->write_byte(mtd, NAND_CMD_READID);
+ doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE);
+ doc200x_hwcontrol(mtd, NAND_CTL_SETALE);
+ this->write_byte(mtd, 0);
+ doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
+
+ ret = this->read_byte(mtd) << 8;
+ ret |= this->read_byte(mtd);
+
+ if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) {
+ /* First chip probe. See if we get same results by 32-bit access */
+ union {
+ uint32_t dword;
+ uint8_t byte[4];
+ } ident;
+ void __iomem *docptr = doc->virtadr;
+
+ doc200x_hwcontrol(mtd, NAND_CTL_SETCLE);
+ doc2000_write_byte(mtd, NAND_CMD_READID);
+ doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE);
+ doc200x_hwcontrol(mtd, NAND_CTL_SETALE);
+ doc2000_write_byte(mtd, 0);
+ doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
+
+ ident.dword = readl(docptr + DoC_2k_CDSN_IO);
+ if (((ident.byte[0] << 8) | ident.byte[1]) == ret) {
+ printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n");
+ this->read_buf = &doc2000_readbuf_dword;
+ }
+ }
+
+ return ret;
+}
+
+static void __init doc2000_count_chips(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ uint16_t mfrid;
+ int i;
+
+ /* Max 4 chips per floor on DiskOnChip 2000 */
+ doc->chips_per_floor = 4;
+
+ /* Find out what the first chip is */
+ mfrid = doc200x_ident_chip(mtd, 0);
+
+ /* Find how many chips in each floor. */
+ for (i = 1; i < 4; i++) {
+ if (doc200x_ident_chip(mtd, i) != mfrid)
+ break;
+ }
+ doc->chips_per_floor = i;
+ printk(KERN_DEBUG "Detected %d chips per floor.\n", i);
+}
+
+static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this, int state)
+{
+ struct doc_priv *doc = this->priv;
+
+ int status;
+
+ DoC_WaitReady(doc);
+ this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
+ DoC_WaitReady(doc);
+ status = (int)this->read_byte(mtd);
+
+ return status;
+}
+
+static void doc2001_write_byte(struct mtd_info *mtd, u_char datum)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+
+ WriteDOC(datum, docptr, CDSNSlowIO);
+ WriteDOC(datum, docptr, Mil_CDSN_IO);
+ WriteDOC(datum, docptr, WritePipeTerm);
+}
+
+static u_char doc2001_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+
+ /*ReadDOC(docptr, CDSNSlowIO); */
+ /* 11.4.5 -- delay twice to allow extended length cycle */
+ DoC_Delay(doc, 2);
+ ReadDOC(docptr, ReadPipeInit);
+ /*return ReadDOC(docptr, Mil_CDSN_IO); */
+ return ReadDOC(docptr, LastDataRead);
+}
+
+static void doc2001_writebuf(struct mtd_info *mtd,
+ const u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int i;
+
+ for (i=0; i < len; i++)
+ WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i);
+ /* Terminate write pipeline */
+ WriteDOC(0x00, docptr, WritePipeTerm);
+}
+
+static void doc2001_readbuf(struct mtd_info *mtd,
+ u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int i;
+
+ /* Start read pipeline */
+ ReadDOC(docptr, ReadPipeInit);
+
+ for (i=0; i < len-1; i++)
+ buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff));
+
+ /* Terminate read pipeline */
+ buf[i] = ReadDOC(docptr, LastDataRead);
+}
+
+static int doc2001_verifybuf(struct mtd_info *mtd,
+ const u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int i;
+
+ /* Start read pipeline */
+ ReadDOC(docptr, ReadPipeInit);
+
+ for (i=0; i < len-1; i++)
+ if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) {
+ ReadDOC(docptr, LastDataRead);
+ return i;
+ }
+ if (buf[i] != ReadDOC(docptr, LastDataRead))
+ return i;
+ return 0;
+}
+
+static u_char doc2001plus_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ u_char ret;
+
+ ReadDOC(docptr, Mplus_ReadPipeInit);
+ ReadDOC(docptr, Mplus_ReadPipeInit);
+ ret = ReadDOC(docptr, Mplus_LastDataRead);
+ if (debug) printk("read_byte returns %02x\n", ret);
+ return ret;
+}
+
+static void doc2001plus_writebuf(struct mtd_info *mtd,
+ const u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int i;
+
+ if (debug)printk("writebuf of %d bytes: ", len);
+ for (i=0; i < len; i++) {
+ WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i);
+ if (debug && i < 16)
+ printk("%02x ", buf[i]);
+ }
+ if (debug) printk("\n");
+}
+
+static void doc2001plus_readbuf(struct mtd_info *mtd,
+ u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int i;
+
+ if (debug)printk("readbuf of %d bytes: ", len);
+
+ /* Start read pipeline */
+ ReadDOC(docptr, Mplus_ReadPipeInit);
+ ReadDOC(docptr, Mplus_ReadPipeInit);
+
+ for (i=0; i < len-2; i++) {
+ buf[i] = ReadDOC(docptr, Mil_CDSN_IO);
+ if (debug && i < 16)
+ printk("%02x ", buf[i]);
+ }
+
+ /* Terminate read pipeline */
+ buf[len-2] = ReadDOC(docptr, Mplus_LastDataRead);
+ if (debug && i < 16)
+ printk("%02x ", buf[len-2]);
+ buf[len-1] = ReadDOC(docptr, Mplus_LastDataRead);
+ if (debug && i < 16)
+ printk("%02x ", buf[len-1]);
+ if (debug) printk("\n");
+}
+
+static int doc2001plus_verifybuf(struct mtd_info *mtd,
+ const u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int i;
+
+ if (debug)printk("verifybuf of %d bytes: ", len);
+
+ /* Start read pipeline */
+ ReadDOC(docptr, Mplus_ReadPipeInit);
+ ReadDOC(docptr, Mplus_ReadPipeInit);
+
+ for (i=0; i < len-2; i++)
+ if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) {
+ ReadDOC(docptr, Mplus_LastDataRead);
+ ReadDOC(docptr, Mplus_LastDataRead);
+ return i;
+ }
+ if (buf[len-2] != ReadDOC(docptr, Mplus_LastDataRead))
+ return len-2;
+ if (buf[len-1] != ReadDOC(docptr, Mplus_LastDataRead))
+ return len-1;
+ return 0;
+}
+
+static void doc2001plus_select_chip(struct mtd_info *mtd, int chip)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int floor = 0;
+
+ if(debug)printk("select chip (%d)\n", chip);
+
+ if (chip == -1) {
+ /* Disable flash internally */
+ WriteDOC(0, docptr, Mplus_FlashSelect);
+ return;
+ }
+
+ floor = chip / doc->chips_per_floor;
+ chip -= (floor * doc->chips_per_floor);
+
+ /* Assert ChipEnable and deassert WriteProtect */
+ WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect);
+ this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+
+ doc->curchip = chip;
+ doc->curfloor = floor;
+}
+
+static void doc200x_select_chip(struct mtd_info *mtd, int chip)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int floor = 0;
+
+ if(debug)printk("select chip (%d)\n", chip);
+
+ if (chip == -1)
+ return;
+
+ floor = chip / doc->chips_per_floor;
+ chip -= (floor * doc->chips_per_floor);
+
+ /* 11.4.4 -- deassert CE before changing chip */
+ doc200x_hwcontrol(mtd, NAND_CTL_CLRNCE);
+
+ WriteDOC(floor, docptr, FloorSelect);
+ WriteDOC(chip, docptr, CDSNDeviceSelect);
+
+ doc200x_hwcontrol(mtd, NAND_CTL_SETNCE);
+
+ doc->curchip = chip;
+ doc->curfloor = floor;
+}
+
+static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+
+ switch(cmd) {
+ case NAND_CTL_SETNCE:
+ doc->CDSNControl |= CDSN_CTRL_CE;
+ break;
+ case NAND_CTL_CLRNCE:
+ doc->CDSNControl &= ~CDSN_CTRL_CE;
+ break;
+ case NAND_CTL_SETCLE:
+ doc->CDSNControl |= CDSN_CTRL_CLE;
+ break;
+ case NAND_CTL_CLRCLE:
+ doc->CDSNControl &= ~CDSN_CTRL_CLE;
+ break;
+ case NAND_CTL_SETALE:
+ doc->CDSNControl |= CDSN_CTRL_ALE;
+ break;
+ case NAND_CTL_CLRALE:
+ doc->CDSNControl &= ~CDSN_CTRL_ALE;
+ break;
+ case NAND_CTL_SETWP:
+ doc->CDSNControl |= CDSN_CTRL_WP;
+ break;
+ case NAND_CTL_CLRWP:
+ doc->CDSNControl &= ~CDSN_CTRL_WP;
+ break;
+ }
+ if (debug)printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl);
+ WriteDOC(doc->CDSNControl, docptr, CDSNControl);
+ /* 11.4.3 -- 4 NOPs after CSDNControl write */
+ DoC_Delay(doc, 4);
+}
+
+static void doc2001plus_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+
+ /*
+ * Must terminate write pipeline before sending any commands
+ * to the device.
+ */
+ if (command == NAND_CMD_PAGEPROG) {
+ WriteDOC(0x00, docptr, Mplus_WritePipeTerm);
+ WriteDOC(0x00, docptr, Mplus_WritePipeTerm);
+ }
+
+ /*
+ * Write out the command to the device.
+ */
+ if (command == NAND_CMD_SEQIN) {
+ int readcmd;
+
+ if (column >= mtd->oobblock) {
+ /* OOB area */
+ column -= mtd->oobblock;
+ readcmd = NAND_CMD_READOOB;
+ } else if (column < 256) {
+ /* First 256 bytes --> READ0 */
+ readcmd = NAND_CMD_READ0;
+ } else {
+ column -= 256;
+ readcmd = NAND_CMD_READ1;
+ }
+ WriteDOC(readcmd, docptr, Mplus_FlashCmd);
+ }
+ WriteDOC(command, docptr, Mplus_FlashCmd);
+ WriteDOC(0, docptr, Mplus_WritePipeTerm);
+ WriteDOC(0, docptr, Mplus_WritePipeTerm);
+
+ if (column != -1 || page_addr != -1) {
+ /* Serially input address */
+ if (column != -1) {
+ /* Adjust columns for 16 bit buswidth */
+ if (this->options & NAND_BUSWIDTH_16)
+ column >>= 1;
+ WriteDOC(column, docptr, Mplus_FlashAddress);
+ }
+ if (page_addr != -1) {
+ WriteDOC((unsigned char) (page_addr & 0xff), docptr, Mplus_FlashAddress);
+ WriteDOC((unsigned char) ((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress);
+ /* One more address cycle for higher density devices */
+ if (this->chipsize & 0x0c000000) {
+ WriteDOC((unsigned char) ((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress);
+ printk("high density\n");
+ }
+ }
+ WriteDOC(0, docptr, Mplus_WritePipeTerm);
+ WriteDOC(0, docptr, Mplus_WritePipeTerm);
+ /* deassert ALE */
+ if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || command == NAND_CMD_READOOB || command == NAND_CMD_READID)
+ WriteDOC(0, docptr, Mplus_FlashControl);
+ }
+
+ /*
+ * program and erase have their own busy handlers
+ * status and sequential in needs no delay
+ */
+ switch (command) {
+
+ case NAND_CMD_PAGEPROG:
+ case NAND_CMD_ERASE1:
+ case NAND_CMD_ERASE2:
+ case NAND_CMD_SEQIN:
+ case NAND_CMD_STATUS:
+ return;
+
+ case NAND_CMD_RESET:
+ if (this->dev_ready)
+ break;
+ udelay(this->chip_delay);
+ WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd);
+ WriteDOC(0, docptr, Mplus_WritePipeTerm);
+ WriteDOC(0, docptr, Mplus_WritePipeTerm);
+ while ( !(this->read_byte(mtd) & 0x40));
+ return;
+
+ /* This applies to read commands */
+ default:
+ /*
+ * If we don't have access to the busy pin, we apply the given
+ * command delay
+ */
+ if (!this->dev_ready) {
+ udelay (this->chip_delay);
+ return;
+ }
+ }
+
+ /* Apply this short delay always to ensure that we do wait tWB in
+ * any case on any machine. */
+ ndelay (100);
+ /* wait until command is processed */
+ while (!this->dev_ready(mtd));
+}
+
+static int doc200x_dev_ready(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+
+ if (DoC_is_MillenniumPlus(doc)) {
+ /* 11.4.2 -- must NOP four times before checking FR/B# */
+ DoC_Delay(doc, 4);
+ if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) {
+ if(debug)
+ printk("not ready\n");
+ return 0;
+ }
+ if (debug)printk("was ready\n");
+ return 1;
+ } else {
+ /* 11.4.2 -- must NOP four times before checking FR/B# */
+ DoC_Delay(doc, 4);
+ if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) {
+ if(debug)
+ printk("not ready\n");
+ return 0;
+ }
+ /* 11.4.2 -- Must NOP twice if it's ready */
+ DoC_Delay(doc, 2);
+ if (debug)printk("was ready\n");
+ return 1;
+ }
+}
+
+static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
+{
+ /* This is our last resort if we couldn't find or create a BBT. Just
+ pretend all blocks are good. */
+ return 0;
+}
+
+static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+
+ /* Prime the ECC engine */
+ switch(mode) {
+ case NAND_ECC_READ:
+ WriteDOC(DOC_ECC_RESET, docptr, ECCConf);
+ WriteDOC(DOC_ECC_EN, docptr, ECCConf);
+ break;
+ case NAND_ECC_WRITE:
+ WriteDOC(DOC_ECC_RESET, docptr, ECCConf);
+ WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf);
+ break;
+ }
+}
+
+static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+
+ /* Prime the ECC engine */
+ switch(mode) {
+ case NAND_ECC_READ:
+ WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf);
+ WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf);
+ break;
+ case NAND_ECC_WRITE:
+ WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf);
+ WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf);
+ break;
+ }
+}
+
+/* This code is only called on write */
+static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
+ unsigned char *ecc_code)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ int i;
+ int emptymatch = 1;
+
+ /* flush the pipeline */
+ if (DoC_is_2000(doc)) {
+ WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl);
+ WriteDOC(0, docptr, 2k_CDSN_IO);
+ WriteDOC(0, docptr, 2k_CDSN_IO);
+ WriteDOC(0, docptr, 2k_CDSN_IO);
+ WriteDOC(doc->CDSNControl, docptr, CDSNControl);
+ } else if (DoC_is_MillenniumPlus(doc)) {
+ WriteDOC(0, docptr, Mplus_NOP);
+ WriteDOC(0, docptr, Mplus_NOP);
+ WriteDOC(0, docptr, Mplus_NOP);
+ } else {
+ WriteDOC(0, docptr, NOP);
+ WriteDOC(0, docptr, NOP);
+ WriteDOC(0, docptr, NOP);
+ }
+
+ for (i = 0; i < 6; i++) {
+ if (DoC_is_MillenniumPlus(doc))
+ ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i);
+ else
+ ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i);
+ if (ecc_code[i] != empty_write_ecc[i])
+ emptymatch = 0;
+ }
+ if (DoC_is_MillenniumPlus(doc))
+ WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf);
+ else
+ WriteDOC(DOC_ECC_DIS, docptr, ECCConf);
+#if 0
+ /* If emptymatch=1, we might have an all-0xff data buffer. Check. */
+ if (emptymatch) {
+ /* Note: this somewhat expensive test should not be triggered
+ often. It could be optimized away by examining the data in
+ the writebuf routine, and remembering the result. */
+ for (i = 0; i < 512; i++) {
+ if (dat[i] == 0xff) continue;
+ emptymatch = 0;
+ break;
+ }
+ }
+ /* If emptymatch still =1, we do have an all-0xff data buffer.
+ Return all-0xff ecc value instead of the computed one, so
+ it'll look just like a freshly-erased page. */
+ if (emptymatch) memset(ecc_code, 0xff, 6);
+#endif
+ return 0;
+}
+
+static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc)
+{
+ int i, ret = 0;
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ void __iomem *docptr = doc->virtadr;
+ volatile u_char dummy;
+ int emptymatch = 1;
+
+ /* flush the pipeline */
+ if (DoC_is_2000(doc)) {
+ dummy = ReadDOC(docptr, 2k_ECCStatus);
+ dummy = ReadDOC(docptr, 2k_ECCStatus);
+ dummy = ReadDOC(docptr, 2k_ECCStatus);
+ } else if (DoC_is_MillenniumPlus(doc)) {
+ dummy = ReadDOC(docptr, Mplus_ECCConf);
+ dummy = ReadDOC(docptr, Mplus_ECCConf);
+ dummy = ReadDOC(docptr, Mplus_ECCConf);
+ } else {
+ dummy = ReadDOC(docptr, ECCConf);
+ dummy = ReadDOC(docptr, ECCConf);
+ dummy = ReadDOC(docptr, ECCConf);
+ }
+
+ /* Error occured ? */
+ if (dummy & 0x80) {
+ for (i = 0; i < 6; i++) {
+ if (DoC_is_MillenniumPlus(doc))
+ calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i);
+ else
+ calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i);
+ if (calc_ecc[i] != empty_read_syndrome[i])
+ emptymatch = 0;
+ }
+ /* If emptymatch=1, the read syndrome is consistent with an
+ all-0xff data and stored ecc block. Check the stored ecc. */
+ if (emptymatch) {
+ for (i = 0; i < 6; i++) {
+ if (read_ecc[i] == 0xff) continue;
+ emptymatch = 0;
+ break;
+ }
+ }
+ /* If emptymatch still =1, check the data block. */
+ if (emptymatch) {
+ /* Note: this somewhat expensive test should not be triggered
+ often. It could be optimized away by examining the data in
+ the readbuf routine, and remembering the result. */
+ for (i = 0; i < 512; i++) {
+ if (dat[i] == 0xff) continue;
+ emptymatch = 0;
+ break;
+ }
+ }
+ /* If emptymatch still =1, this is almost certainly a freshly-
+ erased block, in which case the ECC will not come out right.
+ We'll suppress the error and tell the caller everything's
+ OK. Because it is. */
+ if (!emptymatch) ret = doc_ecc_decode (rs_decoder, dat, calc_ecc);
+ if (ret > 0)
+ printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret);
+ }
+ if (DoC_is_MillenniumPlus(doc))
+ WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf);
+ else
+ WriteDOC(DOC_ECC_DIS, docptr, ECCConf);
+ if (no_ecc_failures && (ret == -1)) {
+ printk(KERN_ERR "suppressing ECC failure\n");
+ ret = 0;
+ }
+ return ret;
+}
+
+/*u_char mydatabuf[528]; */
+
+static struct nand_oobinfo doc200x_oobinfo = {
+ .useecc = MTD_NANDECC_AUTOPLACE,
+ .eccbytes = 6,
+ .eccpos = {0, 1, 2, 3, 4, 5},
+ .oobfree = { {8, 8} }
+};
+
+/* Find the (I)NFTL Media Header, and optionally also the mirror media header.
+ On sucessful return, buf will contain a copy of the media header for
+ further processing. id is the string to scan for, and will presumably be
+ either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media
+ header. The page #s of the found media headers are placed in mh0_page and
+ mh1_page in the DOC private structure. */
+static int __init find_media_headers(struct mtd_info *mtd, u_char *buf,
+ const char *id, int findmirror)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ unsigned offs, end = (MAX_MEDIAHEADER_SCAN << this->phys_erase_shift);
+ int ret;
+ size_t retlen;
+
+ end = min(end, mtd->size); /* paranoia */
+ for (offs = 0; offs < end; offs += mtd->erasesize) {
+ ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf);
+ if (retlen != mtd->oobblock) continue;
+ if (ret) {
+ printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n",
+ offs);
+ }
+ if (memcmp(buf, id, 6)) continue;
+ printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs);
+ if (doc->mh0_page == -1) {
+ doc->mh0_page = offs >> this->page_shift;
+ if (!findmirror) return 1;
+ continue;
+ }
+ doc->mh1_page = offs >> this->page_shift;
+ return 2;
+ }
+ if (doc->mh0_page == -1) {
+ printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id);
+ return 0;
+ }
+ /* Only one mediaheader was found. We want buf to contain a
+ mediaheader on return, so we'll have to re-read the one we found. */
+ offs = doc->mh0_page << this->page_shift;
+ ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf);
+ if (retlen != mtd->oobblock) {
+ /* Insanity. Give up. */
+ printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n");
+ return 0;
+ }
+ return 1;
+}
+
+static inline int __init nftl_partscan(struct mtd_info *mtd,
+ struct mtd_partition *parts)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ int ret = 0;
+ u_char *buf;
+ struct NFTLMediaHeader *mh;
+ const unsigned psize = 1 << this->page_shift;
+ unsigned blocks, maxblocks;
+ int offs, numheaders;
+
+ buf = kmalloc(mtd->oobblock, GFP_KERNEL);
+ if (!buf) {
+ printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n");
+ return 0;
+ }
+ if (!(numheaders=find_media_headers(mtd, buf, "ANAND", 1))) goto out;
+ mh = (struct NFTLMediaHeader *) buf;
+
+/*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
+/* if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
+ printk(KERN_INFO " DataOrgID = %s\n"
+ " NumEraseUnits = %d\n"
+ " FirstPhysicalEUN = %d\n"
+ " FormattedSize = %d\n"
+ " UnitSizeFactor = %d\n",
+ mh->DataOrgID, mh->NumEraseUnits,
+ mh->FirstPhysicalEUN, mh->FormattedSize,
+ mh->UnitSizeFactor);
+/*#endif */
+
+ blocks = mtd->size >> this->phys_erase_shift;
+ maxblocks = min(32768U, mtd->erasesize - psize);
+
+ if (mh->UnitSizeFactor == 0x00) {
+ /* Auto-determine UnitSizeFactor. The constraints are:
+ - There can be at most 32768 virtual blocks.
+ - There can be at most (virtual block size - page size)
+ virtual blocks (because MediaHeader+BBT must fit in 1).
+ */
+ mh->UnitSizeFactor = 0xff;
+ while (blocks > maxblocks) {
+ blocks >>= 1;
+ maxblocks = min(32768U, (maxblocks << 1) + psize);
+ mh->UnitSizeFactor--;
+ }
+ printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor);
+ }
+
+ /* NOTE: The lines below modify internal variables of the NAND and MTD
+ layers; variables with have already been configured by nand_scan.
+ Unfortunately, we didn't know before this point what these values
+ should be. Thus, this code is somewhat dependant on the exact
+ implementation of the NAND layer. */
+ if (mh->UnitSizeFactor != 0xff) {
+ this->bbt_erase_shift += (0xff - mh->UnitSizeFactor);
+ mtd->erasesize <<= (0xff - mh->UnitSizeFactor);
+ printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize);
+ blocks = mtd->size >> this->bbt_erase_shift;
+ maxblocks = min(32768U, mtd->erasesize - psize);
+ }
+
+ if (blocks > maxblocks) {
+ printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor);
+ goto out;
+ }
+
+ /* Skip past the media headers. */
+ offs = max(doc->mh0_page, doc->mh1_page);
+ offs <<= this->page_shift;
+ offs += mtd->erasesize;
+
+ /*parts[0].name = " DiskOnChip Boot / Media Header partition"; */
+ /*parts[0].offset = 0; */
+ /*parts[0].size = offs; */
+
+ parts[0].name = " DiskOnChip BDTL partition";
+ parts[0].offset = offs;
+ parts[0].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift;
+
+ offs += parts[0].size;
+ if (offs < mtd->size) {
+ parts[1].name = " DiskOnChip Remainder partition";
+ parts[1].offset = offs;
+ parts[1].size = mtd->size - offs;
+ ret = 2;
+ goto out;
+ }
+ ret = 1;
+out:
+ kfree(buf);
+ return ret;
+}
+
+/* This is a stripped-down copy of the code in inftlmount.c */
+static inline int __init inftl_partscan(struct mtd_info *mtd,
+ struct mtd_partition *parts)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ int ret = 0;
+ u_char *buf;
+ struct INFTLMediaHeader *mh;
+ struct INFTLPartition *ip;
+ int numparts = 0;
+ int blocks;
+ int vshift, lastvunit = 0;
+ int i;
+ int end = mtd->size;
+
+ if (inftl_bbt_write)
+ end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift);
+
+ buf = kmalloc(mtd->oobblock, GFP_KERNEL);
+ if (!buf) {
+ printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n");
+ return 0;
+ }
+
+ if (!find_media_headers(mtd, buf, "BNAND", 0)) goto out;
+ doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift);
+ mh = (struct INFTLMediaHeader *) buf;
+
+ mh->NoOfBootImageBlocks = le32_to_cpu(mh->NoOfBootImageBlocks);
+ mh->NoOfBinaryPartitions = le32_to_cpu(mh->NoOfBinaryPartitions);
+ mh->NoOfBDTLPartitions = le32_to_cpu(mh->NoOfBDTLPartitions);
+ mh->BlockMultiplierBits = le32_to_cpu(mh->BlockMultiplierBits);
+ mh->FormatFlags = le32_to_cpu(mh->FormatFlags);
+ mh->PercentUsed = le32_to_cpu(mh->PercentUsed);
+
+/*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
+/* if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
+ printk(KERN_INFO " bootRecordID = %s\n"
+ " NoOfBootImageBlocks = %d\n"
+ " NoOfBinaryPartitions = %d\n"
+ " NoOfBDTLPartitions = %d\n"
+ " BlockMultiplerBits = %d\n"
+ " FormatFlgs = %d\n"
+ " OsakVersion = %d.%d.%d.%d\n"
+ " PercentUsed = %d\n",
+ mh->bootRecordID, mh->NoOfBootImageBlocks,
+ mh->NoOfBinaryPartitions,
+ mh->NoOfBDTLPartitions,
+ mh->BlockMultiplierBits, mh->FormatFlags,
+ ((unsigned char *) &mh->OsakVersion)[0] & 0xf,
+ ((unsigned char *) &mh->OsakVersion)[1] & 0xf,
+ ((unsigned char *) &mh->OsakVersion)[2] & 0xf,
+ ((unsigned char *) &mh->OsakVersion)[3] & 0xf,
+ mh->PercentUsed);
+/*#endif */
+
+ vshift = this->phys_erase_shift + mh->BlockMultiplierBits;
+
+ blocks = mtd->size >> vshift;
+ if (blocks > 32768) {
+ printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits);
+ goto out;
+ }
+
+ blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift);
+ if (inftl_bbt_write && (blocks > mtd->erasesize)) {
+ printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n");
+ goto out;
+ }
+
+ /* Scan the partitions */
+ for (i = 0; (i < 4); i++) {
+ ip = &(mh->Partitions[i]);
+ ip->virtualUnits = le32_to_cpu(ip->virtualUnits);
+ ip->firstUnit = le32_to_cpu(ip->firstUnit);
+ ip->lastUnit = le32_to_cpu(ip->lastUnit);
+ ip->flags = le32_to_cpu(ip->flags);
+ ip->spareUnits = le32_to_cpu(ip->spareUnits);
+ ip->Reserved0 = le32_to_cpu(ip->Reserved0);
+
+/*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
+/* if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
+ printk(KERN_INFO " PARTITION[%d] ->\n"
+ " virtualUnits = %d\n"
+ " firstUnit = %d\n"
+ " lastUnit = %d\n"
+ " flags = 0x%x\n"
+ " spareUnits = %d\n",
+ i, ip->virtualUnits, ip->firstUnit,
+ ip->lastUnit, ip->flags,
+ ip->spareUnits);
+/*#endif */
+
+/*
+ if ((i == 0) && (ip->firstUnit > 0)) {
+ parts[0].name = " DiskOnChip IPL / Media Header partition";
+ parts[0].offset = 0;
+ parts[0].size = mtd->erasesize * ip->firstUnit;
+ numparts = 1;
+ }
+*/
+
+ if (ip->flags & INFTL_BINARY)
+ parts[numparts].name = " DiskOnChip BDK partition";
+ else
+ parts[numparts].name = " DiskOnChip BDTL partition";
+ parts[numparts].offset = ip->firstUnit << vshift;
+ parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift;
+ numparts++;
+ if (ip->lastUnit > lastvunit) lastvunit = ip->lastUnit;
+ if (ip->flags & INFTL_LAST) break;
+ }
+ lastvunit++;
+ if ((lastvunit << vshift) < end) {
+ parts[numparts].name = " DiskOnChip Remainder partition";
+ parts[numparts].offset = lastvunit << vshift;
+ parts[numparts].size = end - parts[numparts].offset;
+ numparts++;
+ }
+ ret = numparts;
+out:
+ kfree(buf);
+ return ret;
+}
+
+static int __init nftl_scan_bbt(struct mtd_info *mtd)
+{
+ int ret, numparts;
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ struct mtd_partition parts[2];
+
+ memset((char *) parts, 0, sizeof(parts));
+ /* On NFTL, we have to find the media headers before we can read the
+ BBTs, since they're stored in the media header eraseblocks. */
+ numparts = nftl_partscan(mtd, parts);
+ if (!numparts) return -EIO;
+ this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT |
+ NAND_BBT_SAVECONTENT | NAND_BBT_WRITE |
+ NAND_BBT_VERSION;
+ this->bbt_td->veroffs = 7;
+ this->bbt_td->pages[0] = doc->mh0_page + 1;
+ if (doc->mh1_page != -1) {
+ this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT |
+ NAND_BBT_SAVECONTENT | NAND_BBT_WRITE |
+ NAND_BBT_VERSION;
+ this->bbt_md->veroffs = 7;
+ this->bbt_md->pages[0] = doc->mh1_page + 1;
+ } else {
+ this->bbt_md = NULL;
+ }
+
+ /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
+ At least as nand_bbt.c is currently written. */
+ if ((ret = nand_scan_bbt(mtd, NULL)))
+ return ret;
+ add_mtd_device(mtd);
+#ifdef CONFIG_MTD_PARTITIONS
+ if (!no_autopart)
+ add_mtd_partitions(mtd, parts, numparts);
+#endif
+ return 0;
+}
+
+static int __init inftl_scan_bbt(struct mtd_info *mtd)
+{
+ int ret, numparts;
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+ struct mtd_partition parts[5];
+
+ if (this->numchips > doc->chips_per_floor) {
+ printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n");
+ return -EIO;
+ }
+
+ if (DoC_is_MillenniumPlus(doc)) {
+ this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE;
+ if (inftl_bbt_write)
+ this->bbt_td->options |= NAND_BBT_WRITE;
+ this->bbt_td->pages[0] = 2;
+ this->bbt_md = NULL;
+ } else {
+ this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT |
+ NAND_BBT_VERSION;
+ if (inftl_bbt_write)
+ this->bbt_td->options |= NAND_BBT_WRITE;
+ this->bbt_td->offs = 8;
+ this->bbt_td->len = 8;
+ this->bbt_td->veroffs = 7;
+ this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS;
+ this->bbt_td->reserved_block_code = 0x01;
+ this->bbt_td->pattern = "MSYS_BBT";
+
+ this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT |
+ NAND_BBT_VERSION;
+ if (inftl_bbt_write)
+ this->bbt_md->options |= NAND_BBT_WRITE;
+ this->bbt_md->offs = 8;
+ this->bbt_md->len = 8;
+ this->bbt_md->veroffs = 7;
+ this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS;
+ this->bbt_md->reserved_block_code = 0x01;
+ this->bbt_md->pattern = "TBB_SYSM";
+ }
+
+ /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
+ At least as nand_bbt.c is currently written. */
+ if ((ret = nand_scan_bbt(mtd, NULL)))
+ return ret;
+ memset((char *) parts, 0, sizeof(parts));
+ numparts = inftl_partscan(mtd, parts);
+ /* At least for now, require the INFTL Media Header. We could probably
+ do without it for non-INFTL use, since all it gives us is
+ autopartitioning, but I want to give it more thought. */
+ if (!numparts) return -EIO;
+ add_mtd_device(mtd);
+#ifdef CONFIG_MTD_PARTITIONS
+ if (!no_autopart)
+ add_mtd_partitions(mtd, parts, numparts);
+#endif
+ return 0;
+}
+
+static inline int __init doc2000_init(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+
+ this->write_byte = doc2000_write_byte;
+ this->read_byte = doc2000_read_byte;
+ this->write_buf = doc2000_writebuf;
+ this->read_buf = doc2000_readbuf;
+ this->verify_buf = doc2000_verifybuf;
+ this->scan_bbt = nftl_scan_bbt;
+
+ doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO;
+ doc2000_count_chips(mtd);
+ mtd->name = "DiskOnChip 2000 (NFTL Model)";
+ return (4 * doc->chips_per_floor);
+}
+
+static inline int __init doc2001_init(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+
+ this->write_byte = doc2001_write_byte;
+ this->read_byte = doc2001_read_byte;
+ this->write_buf = doc2001_writebuf;
+ this->read_buf = doc2001_readbuf;
+ this->verify_buf = doc2001_verifybuf;
+
+ ReadDOC(doc->virtadr, ChipID);
+ ReadDOC(doc->virtadr, ChipID);
+ ReadDOC(doc->virtadr, ChipID);
+ if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) {
+ /* It's not a Millennium; it's one of the newer
+ DiskOnChip 2000 units with a similar ASIC.
+ Treat it like a Millennium, except that it
+ can have multiple chips. */
+ doc2000_count_chips(mtd);
+ mtd->name = "DiskOnChip 2000 (INFTL Model)";
+ this->scan_bbt = inftl_scan_bbt;
+ return (4 * doc->chips_per_floor);
+ } else {
+ /* Bog-standard Millennium */
+ doc->chips_per_floor = 1;
+ mtd->name = "DiskOnChip Millennium";
+ this->scan_bbt = nftl_scan_bbt;
+ return 1;
+ }
+}
+
+static inline int __init doc2001plus_init(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ struct doc_priv *doc = this->priv;
+
+ this->write_byte = NULL;
+ this->read_byte = doc2001plus_read_byte;
+ this->write_buf = doc2001plus_writebuf;
+ this->read_buf = doc2001plus_readbuf;
+ this->verify_buf = doc2001plus_verifybuf;
+ this->scan_bbt = inftl_scan_bbt;
+ this->hwcontrol = NULL;
+ this->select_chip = doc2001plus_select_chip;
+ this->cmdfunc = doc2001plus_command;
+ this->enable_hwecc = doc2001plus_enable_hwecc;
+
+ doc->chips_per_floor = 1;
+ mtd->name = "DiskOnChip Millennium Plus";
+
+ return 1;
+}
+
+static inline int __init doc_probe(unsigned long physadr)
+{
+ unsigned char ChipID;
+ struct mtd_info *mtd;
+ struct nand_chip *nand;
+ struct doc_priv *doc;
+ void __iomem *virtadr;
+ unsigned char save_control;
+ unsigned char tmp, tmpb, tmpc;
+ int reg, len, numchips;
+ int ret = 0;
+
+ virtadr = ioremap(physadr, DOC_IOREMAP_LEN);
+ if (!virtadr) {
+ printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr);
+ return -EIO;
+ }
+
+ /* It's not possible to cleanly detect the DiskOnChip - the
+ * bootup procedure will put the device into reset mode, and
+ * it's not possible to talk to it without actually writing
+ * to the DOCControl register. So we store the current contents
+ * of the DOCControl register's location, in case we later decide
+ * that it's not a DiskOnChip, and want to put it back how we
+ * found it.
+ */
+ save_control = ReadDOC(virtadr, DOCControl);
+
+ /* Reset the DiskOnChip ASIC */
+ WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
+ virtadr, DOCControl);
+ WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
+ virtadr, DOCControl);
+
+ /* Enable the DiskOnChip ASIC */
+ WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
+ virtadr, DOCControl);
+ WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
+ virtadr, DOCControl);
+
+ ChipID = ReadDOC(virtadr, ChipID);
+
+ switch(ChipID) {
+ case DOC_ChipID_Doc2k:
+ reg = DoC_2k_ECCStatus;
+ break;
+ case DOC_ChipID_DocMil:
+ reg = DoC_ECCConf;
+ break;
+ case DOC_ChipID_DocMilPlus16:
+ case DOC_ChipID_DocMilPlus32:
+ case 0:
+ /* Possible Millennium Plus, need to do more checks */
+ /* Possibly release from power down mode */
+ for (tmp = 0; (tmp < 4); tmp++)
+ ReadDOC(virtadr, Mplus_Power);
+
+ /* Reset the Millennium Plus ASIC */
+ tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT |
+ DOC_MODE_BDECT;
+ WriteDOC(tmp, virtadr, Mplus_DOCControl);
+ WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm);
+
+ mdelay(1);
+ /* Enable the Millennium Plus ASIC */
+ tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT |
+ DOC_MODE_BDECT;
+ WriteDOC(tmp, virtadr, Mplus_DOCControl);
+ WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm);
+ mdelay(1);
+
+ ChipID = ReadDOC(virtadr, ChipID);
+
+ switch (ChipID) {
+ case DOC_ChipID_DocMilPlus16:
+ reg = DoC_Mplus_Toggle;
+ break;
+ case DOC_ChipID_DocMilPlus32:
+ printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n");
+ default:
+ ret = -ENODEV;
+ goto notfound;
+ }
+ break;
+
+ default:
+ ret = -ENODEV;
+ goto notfound;
+ }
+ /* Check the TOGGLE bit in the ECC register */
+ tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT;
+ tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT;
+ tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT;
+ if ((tmp == tmpb) || (tmp != tmpc)) {
+ printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr);
+ ret = -ENODEV;
+ goto notfound;
+ }
+
+ for (mtd = doclist; mtd; mtd = doc->nextdoc) {
+ unsigned char oldval;
+ unsigned char newval;
+ nand = mtd->priv;
+ doc = nand->priv;
+ /* Use the alias resolution register to determine if this is
+ in fact the same DOC aliased to a new address. If writes
+ to one chip's alias resolution register change the value on
+ the other chip, they're the same chip. */
+ if (ChipID == DOC_ChipID_DocMilPlus16) {
+ oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution);
+ newval = ReadDOC(virtadr, Mplus_AliasResolution);
+ } else {
+ oldval = ReadDOC(doc->virtadr, AliasResolution);
+ newval = ReadDOC(virtadr, AliasResolution);
+ }
+ if (oldval != newval)
+ continue;
+ if (ChipID == DOC_ChipID_DocMilPlus16) {
+ WriteDOC(~newval, virtadr, Mplus_AliasResolution);
+ oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution);
+ WriteDOC(newval, virtadr, Mplus_AliasResolution); /* restore it */
+ } else {
+ WriteDOC(~newval, virtadr, AliasResolution);
+ oldval = ReadDOC(doc->virtadr, AliasResolution);
+ WriteDOC(newval, virtadr, AliasResolution); /* restore it */
+ }
+ newval = ~newval;
+ if (oldval == newval) {
+ printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr);
+ goto notfound;
+ }
+ }
+
+ printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr);
+
+ len = sizeof(struct mtd_info) +
+ sizeof(struct nand_chip) +
+ sizeof(struct doc_priv) +
+ (2 * sizeof(struct nand_bbt_descr));
+ mtd = kmalloc(len, GFP_KERNEL);
+ if (!mtd) {
+ printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len);
+ ret = -ENOMEM;
+ goto fail;
+ }
+ memset(mtd, 0, len);
+
+ nand = (struct nand_chip *) (mtd + 1);
+ doc = (struct doc_priv *) (nand + 1);
+ nand->bbt_td = (struct nand_bbt_descr *) (doc + 1);
+ nand->bbt_md = nand->bbt_td + 1;
+
+ mtd->priv = nand;
+ mtd->owner = THIS_MODULE;
+
+ nand->priv = doc;
+ nand->select_chip = doc200x_select_chip;
+ nand->hwcontrol = doc200x_hwcontrol;
+ nand->dev_ready = doc200x_dev_ready;
+ nand->waitfunc = doc200x_wait;
+ nand->block_bad = doc200x_block_bad;
+ nand->enable_hwecc = doc200x_enable_hwecc;
+ nand->calculate_ecc = doc200x_calculate_ecc;
+ nand->correct_data = doc200x_correct_data;
+
+ nand->autooob = &doc200x_oobinfo;
+ nand->eccmode = NAND_ECC_HW6_512;
+ nand->options = NAND_USE_FLASH_BBT | NAND_HWECC_SYNDROME;
+
+ doc->physadr = physadr;
+ doc->virtadr = virtadr;
+ doc->ChipID = ChipID;
+ doc->curfloor = -1;
+ doc->curchip = -1;
+ doc->mh0_page = -1;
+ doc->mh1_page = -1;
+ doc->nextdoc = doclist;
+
+ if (ChipID == DOC_ChipID_Doc2k)
+ numchips = doc2000_init(mtd);
+ else if (ChipID == DOC_ChipID_DocMilPlus16)
+ numchips = doc2001plus_init(mtd);
+ else
+ numchips = doc2001_init(mtd);
+
+ if ((ret = nand_scan(mtd, numchips))) {
+ /* DBB note: i believe nand_release is necessary here, as
+ buffers may have been allocated in nand_base. Check with
+ Thomas. FIX ME! */
+ /* nand_release will call del_mtd_device, but we haven't yet
+ added it. This is handled without incident by
+ del_mtd_device, as far as I can tell. */
+ nand_release(mtd);
+ kfree(mtd);
+ goto fail;
+ }
+
+ /* Success! */
+ doclist = mtd;
+ return 0;
+
+notfound:
+ /* Put back the contents of the DOCControl register, in case it's not
+ actually a DiskOnChip. */
+ WriteDOC(save_control, virtadr, DOCControl);
+fail:
+ iounmap(virtadr);
+ return ret;
+}
+
+static void release_nanddoc(void)
+{
+ struct mtd_info *mtd, *nextmtd;
+ struct nand_chip *nand;
+ struct doc_priv *doc;
+
+ for (mtd = doclist; mtd; mtd = nextmtd) {
+ nand = mtd->priv;
+ doc = nand->priv;
+
+ nextmtd = doc->nextdoc;
+ nand_release(mtd);
+ iounmap(doc->virtadr);
+ kfree(mtd);
+ }
+}
+
+static int __init init_nanddoc(void)
+{
+ int i, ret = 0;
+
+ /* We could create the decoder on demand, if memory is a concern.
+ * This way we have it handy, if an error happens
+ *
+ * Symbolsize is 10 (bits)
+ * Primitve polynomial is x^10+x^3+1
+ * first consecutive root is 510
+ * primitve element to generate roots = 1
+ * generator polinomial degree = 4
+ */
+ rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS);
+ if (!rs_decoder) {
+ printk (KERN_ERR "DiskOnChip: Could not create a RS decoder\n");
+ return -ENOMEM;
+ }
+
+ if (doc_config_location) {
+ printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location);
+ ret = doc_probe(doc_config_location);
+ if (ret < 0)
+ goto outerr;
+ } else {
+ for (i=0; (doc_locations[i] != 0xffffffff); i++) {
+ doc_probe(doc_locations[i]);
+ }
+ }
+ /* No banner message any more. Print a message if no DiskOnChip
+ found, so the user knows we at least tried. */
+ if (!doclist) {
+ printk(KERN_INFO "No valid DiskOnChip devices found\n");
+ ret = -ENODEV;
+ goto outerr;
+ }
+ return 0;
+outerr:
+ free_rs(rs_decoder);
+ return ret;
+}
+
+static void __exit cleanup_nanddoc(void)
+{
+ /* Cleanup the nand/DoC resources */
+ release_nanddoc();
+
+ /* Free the reed solomon resources */
+ if (rs_decoder) {
+ free_rs(rs_decoder);
+ }
+}
+
+module_init(init_nanddoc);
+module_exit(cleanup_nanddoc);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n");
+#endif
diff --git a/drivers/mtd/nand/nand.c b/drivers/mtd/nand/nand.c
new file mode 100644
index 0000000..4927231
--- /dev/null
+++ b/drivers/mtd/nand/nand.c
@@ -0,0 +1,247 @@
+/*
+ * (C) Copyright 2005
+ * 2N Telekomunikace, a.s. <www.2n.cz>
+ * Ladislav Michl <michl@2n.cz>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/mtd.h>
+#include <init.h>
+#include <xfuncs.h>
+#include <driver.h>
+#include <malloc.h>
+#include <ioctl.h>
+#include <nand.h>
+#include <errno.h>
+
+static ssize_t nand_read(struct cdev *cdev, void* buf, size_t count, ulong offset, ulong flags)
+{
+ struct mtd_info *info = cdev->priv;
+ size_t retlen;
+ int ret;
+
+ debug("nand_read: 0x%08x 0x%08x\n", offset, count);
+
+ ret = info->read(info, offset, count, &retlen, buf);
+
+ if(ret) {
+ printf("err %d\n", ret);
+ return ret;
+ }
+ return retlen;
+}
+
+#define NOTALIGNED(x) (x & (info->writesize - 1)) != 0
+
+static int all_ff(const void *buf, int len)
+{
+ int i;
+ const uint8_t *p = buf;
+
+ for (i = 0; i < len; i++)
+ if (p[i] != 0xFF)
+ return 0;
+ return 1;
+}
+
+static ssize_t nand_write(struct cdev* cdev, const void *buf, size_t _count, ulong offset, ulong flags)
+{
+ struct mtd_info *info = cdev->priv;
+ size_t retlen, now;
+ int ret = 0;
+ void *wrbuf = NULL;
+ size_t count = _count;
+
+ if (NOTALIGNED(offset)) {
+ printf("offset 0x%08x not page aligned\n", offset);
+ return -EINVAL;
+ }
+
+ debug("write: 0x%08x 0x%08x\n", offset, count);
+
+ while (count) {
+ now = count > info->writesize ? info->writesize : count;
+
+ if (NOTALIGNED(now)) {
+ debug("not aligned: %d %d\n", info->writesize, (offset % info->writesize));
+ wrbuf = xmalloc(info->writesize);
+ memset(wrbuf, 0xff, info->writesize);
+ memcpy(wrbuf + (offset % info->writesize), buf, now);
+ if (!all_ff(wrbuf, info->writesize))
+ ret = info->write(info, offset & ~(info->writesize - 1),
+ info->writesize, &retlen, wrbuf);
+ free(wrbuf);
+ } else {
+ if (!all_ff(buf, info->writesize))
+ ret = info->write(info, offset, now, &retlen, buf);
+ debug("offset: 0x%08x now: 0x%08x retlen: 0x%08x\n", offset, now, retlen);
+ }
+ if (ret)
+ goto out;
+
+ offset += now;
+ count -= now;
+ buf += now;
+ }
+
+out:
+ return ret ? ret : _count;
+}
+
+static int nand_ioctl(struct cdev *cdev, int request, void *buf)
+{
+ struct mtd_info *info = cdev->priv;
+ struct mtd_info_user *user = buf;
+
+ switch (request) {
+ case MEMGETBADBLOCK:
+ debug("MEMGETBADBLOCK: 0x%08x\n", (off_t)buf);
+ return info->block_isbad(info, (off_t)buf);
+ case MEMSETBADBLOCK:
+ debug("MEMSETBADBLOCK: 0x%08x\n", (off_t)buf);
+ return info->block_markbad(info, (off_t)buf);
+ case MEMGETINFO:
+ user->type = info->type;
+ user->flags = info->flags;
+ user->size = info->size;
+ user->erasesize = info->erasesize;
+ user->oobsize = info->oobsize;
+ /* The below fields are obsolete */
+ user->ecctype = -1;
+ user->eccsize = 0;
+ return 0;
+ }
+
+ return 0;
+}
+
+static ssize_t nand_erase(struct cdev *cdev, size_t count, unsigned long offset)
+{
+ struct mtd_info *info = cdev->priv;
+ struct erase_info erase;
+ int ret;
+
+ memset(&erase, 0, sizeof(erase));
+ erase.mtd = info;
+ erase.addr = offset;
+ erase.len = info->erasesize;
+
+ while (count > 0) {
+ debug("erase %d %d\n", erase.addr, erase.len);
+
+ ret = info->block_isbad(info, erase.addr);
+ if (ret > 0) {
+ printf("Skipping bad block at 0x%08x\n", erase.addr);
+ } else {
+ ret = info->erase(info, &erase);
+ if (ret)
+ return ret;
+ }
+
+ erase.addr += info->erasesize;
+ count -= count > info->erasesize ? info->erasesize : count;
+ }
+
+ return 0;
+}
+#if 0
+static char* mtd_get_size(struct device_d *, struct param_d *param)
+{
+ static char
+}
+#endif
+
+static struct file_operations nand_ops = {
+ .read = nand_read,
+ .write = nand_write,
+ .ioctl = nand_ioctl,
+ .lseek = dev_lseek_default,
+ .erase = nand_erase,
+};
+
+static ssize_t nand_read_oob(struct cdev *cdev, void *buf, size_t count, ulong offset, ulong flags)
+{
+ struct mtd_info *info = cdev->priv;
+ struct nand_chip *chip = info->priv;
+ struct mtd_oob_ops ops;
+ int ret;
+
+ if (count < info->oobsize)
+ return -EINVAL;
+
+ ops.mode = MTD_OOB_RAW;
+ ops.ooboffs = 0;
+ ops.ooblen = info->oobsize;
+ ops.oobbuf = buf;
+ ops.datbuf = NULL;
+ ops.len = info->oobsize;
+
+ offset /= info->oobsize;
+ ret = info->read_oob(info, offset << chip->page_shift, &ops);
+ if (ret)
+ return ret;
+
+ return info->oobsize;
+}
+
+static struct file_operations nand_ops_oob = {
+ .read = nand_read_oob,
+ .ioctl = nand_ioctl,
+ .lseek = dev_lseek_default,
+};
+
+int add_mtd_device(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ char str[16];
+
+ strcpy(mtd->class_dev.name, "nand");
+ register_device(&mtd->class_dev);
+
+ mtd->cdev.ops = &nand_ops;
+ mtd->cdev.size = mtd->size;
+ mtd->cdev.name = asprintf("nand%d", mtd->class_dev.id);
+ mtd->cdev.priv = mtd;
+ mtd->cdev.dev = &mtd->class_dev;
+
+ sprintf(str, "%u", mtd->size);
+ dev_add_param_fixed(&mtd->class_dev, "size", str);
+
+ devfs_create(&mtd->cdev);
+
+ mtd->cdev_oob.ops = &nand_ops_oob;
+ mtd->cdev_oob.size = (mtd->size >> chip->page_shift) * mtd->oobsize;
+ mtd->cdev_oob.name = asprintf("nand_oob%d", mtd->class_dev.id);
+ mtd->cdev_oob.priv = mtd;
+ mtd->cdev_oob.dev = &mtd->class_dev;
+ devfs_create(&mtd->cdev_oob);
+
+ return 0;
+}
+
+int del_mtd_device (struct mtd_info *mtd)
+{
+ unregister_device(&mtd->class_dev);
+ free(mtd->cdev_oob.name);
+ free(mtd->param_size.value);
+ free(mtd->cdev.name);
+ return 0;
+}
+
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
new file mode 100644
index 0000000..b75a450
--- /dev/null
+++ b/drivers/mtd/nand/nand_base.c
@@ -0,0 +1,2648 @@
+/*
+ * drivers/mtd/nand.c
+ *
+ * Overview:
+ * This is the generic MTD driver for NAND flash devices. It should be
+ * capable of working with almost all NAND chips currently available.
+ * Basic support for AG-AND chips is provided.
+ *
+ * Additional technical information is available on
+ * http://www.linux-mtd.infradead.org/doc/nand.html
+ *
+ * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
+ * 2002-2006 Thomas Gleixner (tglx@linutronix.de)
+ *
+ * Credits:
+ * David Woodhouse for adding multichip support
+ *
+ * Aleph One Ltd. and Toby Churchill Ltd. for supporting the
+ * rework for 2K page size chips
+ *
+ * TODO:
+ * Enable cached programming for 2k page size chips
+ * Check, if mtd->ecctype should be set to MTD_ECC_HW
+ * if we have HW ecc support.
+ * The AG-AND chips have nice features for speed improvement,
+ * which are not supported yet. Read / program 4 pages in one go.
+ * BBT table is not serialized, has to be fixed
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <common.h>
+#include <errno.h>
+#include <clock.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/err.h>
+#include <linux/mtd/nand_ecc.h>
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <malloc.h>
+#include <module.h>
+
+#ifndef DOXYGEN_SHOULD_SKIP_THIS
+
+/* Define default oob placement schemes for large and small page devices */
+static struct nand_ecclayout nand_oob_8 = {
+ .eccbytes = 3,
+ .eccpos = {0, 1, 2},
+ .oobfree = {
+ {.offset = 3,
+ .length = 2},
+ {.offset = 6,
+ .length = 2}}
+};
+
+static struct nand_ecclayout nand_oob_16 = {
+ .eccbytes = 6,
+ .eccpos = {0, 1, 2, 3, 6, 7},
+ .oobfree = {
+ {.offset = 8,
+ . length = 8}}
+};
+
+static struct nand_ecclayout nand_oob_64 = {
+ .eccbytes = 24,
+ .eccpos = {
+ 40, 41, 42, 43, 44, 45, 46, 47,
+ 48, 49, 50, 51, 52, 53, 54, 55,
+ 56, 57, 58, 59, 60, 61, 62, 63},
+ .oobfree = {
+ {.offset = 2,
+ .length = 38}}
+};
+
+static int nand_get_device(struct nand_chip *chip, struct mtd_info *mtd,
+ int new_state);
+
+static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops);
+
+#define DEFINE_LED_TRIGGER(x)
+#define DEFINE_LED_TRIGGER_GLOBAL(x)
+#define led_trigger_register_simple(x, y) do {} while(0)
+#define led_trigger_unregister_simple(x) do {} while(0)
+#define led_trigger_event(x, y) do {} while(0)
+
+/*
+ * For devices which display every fart in the system on a separate LED. Is
+ * compiled away when LED support is disabled.
+ */
+DEFINE_LED_TRIGGER(nand_led_trigger);
+
+/**
+ * nand_release_device - [GENERIC] release chip
+ * @mtd: MTD device structure
+ *
+ * Deselect, release chip lock and wake up anyone waiting on the device
+ */
+static void nand_release_device(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+
+ /* De-select the NAND device */
+ chip->select_chip(mtd, -1);
+
+ /* Release the controller and the chip */
+ chip->controller->active = NULL;
+ chip->state = FL_READY;
+}
+
+/**
+ * nand_read_byte - [DEFAULT] read one byte from the chip
+ * @mtd: MTD device structure
+ *
+ * Default read function for 8bit buswith
+ */
+static uint8_t nand_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ return readb(chip->IO_ADDR_R);
+}
+
+/**
+ * nand_read_byte16 - [DEFAULT] read one byte endianess aware from the chip
+ * @mtd: MTD device structure
+ *
+ * Default read function for 16bit buswith with
+ * endianess conversion
+ */
+static uint8_t nand_read_byte16(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ return (uint8_t) cpu_to_le16(readw(chip->IO_ADDR_R));
+}
+
+/**
+ * nand_read_word - [DEFAULT] read one word from the chip
+ * @mtd: MTD device structure
+ *
+ * Default read function for 16bit buswith without
+ * endianess conversion
+ */
+static u16 nand_read_word(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ return readw(chip->IO_ADDR_R);
+}
+
+/**
+ * nand_select_chip - [DEFAULT] control CE line
+ * @mtd: MTD device structure
+ * @chipnr: chipnumber to select, -1 for deselect
+ *
+ * Default select function for 1 chip devices.
+ */
+static void nand_select_chip(struct mtd_info *mtd, int chipnr)
+{
+ struct nand_chip *chip = mtd->priv;
+
+ switch (chipnr) {
+ case -1:
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE);
+ break;
+ case 0:
+ break;
+ default:
+ printf("%s: illegal chip number %d\n", chipnr);
+ }
+}
+
+/**
+ * nand_write_buf - [DEFAULT] write buffer to chip
+ * @mtd: MTD device structure
+ * @buf: data buffer
+ * @len: number of bytes to write
+ *
+ * Default write function for 8bit buswith
+ */
+static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
+{
+ int i;
+ struct nand_chip *chip = mtd->priv;
+
+ for (i = 0; i < len; i++)
+ writeb(buf[i], chip->IO_ADDR_W);
+}
+
+/**
+ * nand_read_buf - [DEFAULT] read chip data into buffer
+ * @mtd: MTD device structure
+ * @buf: buffer to store date
+ * @len: number of bytes to read
+ *
+ * Default read function for 8bit buswith
+ */
+static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
+{
+ int i;
+ struct nand_chip *chip = mtd->priv;
+
+ for (i = 0; i < len; i++)
+ buf[i] = readb(chip->IO_ADDR_R);
+}
+
+/**
+ * nand_verify_buf - [DEFAULT] Verify chip data against buffer
+ * @mtd: MTD device structure
+ * @buf: buffer containing the data to compare
+ * @len: number of bytes to compare
+ *
+ * Default verify function for 8bit buswith
+ */
+static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
+{
+ int i;
+ struct nand_chip *chip = mtd->priv;
+
+ for (i = 0; i < len; i++)
+ if (buf[i] != readb(chip->IO_ADDR_R))
+ return -EFAULT;
+ return 0;
+}
+
+/**
+ * nand_write_buf16 - [DEFAULT] write buffer to chip
+ * @mtd: MTD device structure
+ * @buf: data buffer
+ * @len: number of bytes to write
+ *
+ * Default write function for 16bit buswith
+ */
+static void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len)
+{
+ int i;
+ struct nand_chip *chip = mtd->priv;
+ u16 *p = (u16 *) buf;
+ len >>= 1;
+
+ for (i = 0; i < len; i++)
+ writew(p[i], chip->IO_ADDR_W);
+
+}
+
+/**
+ * nand_read_buf16 - [DEFAULT] read chip data into buffer
+ * @mtd: MTD device structure
+ * @buf: buffer to store date
+ * @len: number of bytes to read
+ *
+ * Default read function for 16bit buswith
+ */
+static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len)
+{
+ int i;
+ struct nand_chip *chip = mtd->priv;
+ u16 *p = (u16 *) buf;
+ len >>= 1;
+
+ for (i = 0; i < len; i++)
+ p[i] = readw(chip->IO_ADDR_R);
+}
+
+/**
+ * nand_verify_buf16 - [DEFAULT] Verify chip data against buffer
+ * @mtd: MTD device structure
+ * @buf: buffer containing the data to compare
+ * @len: number of bytes to compare
+ *
+ * Default verify function for 16bit buswith
+ */
+static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len)
+{
+ int i;
+ struct nand_chip *chip = mtd->priv;
+ u16 *p = (u16 *) buf;
+ len >>= 1;
+
+ for (i = 0; i < len; i++)
+ if (p[i] != readw(chip->IO_ADDR_R))
+ return -EFAULT;
+
+ return 0;
+}
+
+/**
+ * nand_block_bad - [DEFAULT] Read bad block marker from the chip
+ * @mtd: MTD device structure
+ * @ofs: offset from device start
+ * @getchip: 0, if the chip is already selected
+ *
+ * Check, if the block is bad.
+ */
+static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
+{
+ int page, chipnr, res = 0;
+ struct nand_chip *chip = mtd->priv;
+ u16 bad;
+
+ page = (int)(ofs >> chip->page_shift) & chip->pagemask;
+
+ if (getchip) {
+ chipnr = (int)(ofs >> chip->chip_shift);
+
+ nand_get_device(chip, mtd, FL_READING);
+
+ /* Select the NAND device */
+ chip->select_chip(mtd, chipnr);
+ }
+
+ if (chip->options & NAND_BUSWIDTH_16) {
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos & 0xFE,
+ page);
+ bad = cpu_to_le16(chip->read_word(mtd));
+ if (chip->badblockpos & 0x1)
+ bad >>= 8;
+ if ((bad & 0xFF) != 0xff)
+ res = 1;
+ } else {
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos, page);
+ if (chip->read_byte(mtd) != 0xff)
+ res = 1;
+ }
+
+ if (getchip)
+ nand_release_device(mtd);
+
+ return res;
+}
+
+/**
+ * nand_default_block_markbad - [DEFAULT] mark a block bad
+ * @mtd: MTD device structure
+ * @ofs: offset from device start
+ *
+ * This is the default implementation, which can be overridden by
+ * a hardware specific driver.
+*/
+static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
+{
+ struct nand_chip *chip = mtd->priv;
+ uint8_t buf[2] = { 0, 0 };
+ int block, ret;
+
+ /* Get block number */
+ block = (int)(ofs >> chip->bbt_erase_shift);
+ if (chip->bbt)
+ chip->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
+
+ /* Do we have a flash based bad block table ? */
+ if (chip->options & NAND_USE_FLASH_BBT)
+ ret = nand_update_bbt(mtd, ofs);
+ else {
+ /* We write two bytes, so we dont have to mess with 16 bit
+ * access
+ */
+ nand_get_device(chip, mtd, FL_WRITING);
+ ofs += mtd->oobsize;
+ chip->ops.len = chip->ops.ooblen = 2;
+ chip->ops.datbuf = NULL;
+ chip->ops.oobbuf = buf;
+ chip->ops.ooboffs = chip->badblockpos & ~0x01;
+
+ ret = nand_do_write_oob(mtd, ofs, &chip->ops);
+ nand_release_device(mtd);
+ }
+ if (!ret)
+ mtd->ecc_stats.badblocks++;
+
+ return ret;
+}
+
+/**
+ * nand_check_wp - [GENERIC] check if the chip is write protected
+ * @mtd: MTD device structure
+ * Check, if the device is write protected
+ *
+ * The function expects, that the device is already selected
+ */
+static int nand_check_wp(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ /* Check the WP bit */
+ chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
+ return (chip->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1;
+}
+
+/**
+ * nand_block_checkbad - [GENERIC] Check if a block is marked bad
+ * @mtd: MTD device structure
+ * @ofs: offset from device start
+ * @getchip: 0, if the chip is already selected
+ * @allowbbt: 1, if its allowed to access the bbt area
+ *
+ * Check, if the block is bad. Either by reading the bad block table or
+ * calling of the scan function.
+ */
+static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip,
+ int allowbbt)
+{
+ struct nand_chip *chip = mtd->priv;
+
+ if (!chip->bbt)
+ return chip->block_bad(mtd, ofs, getchip);
+
+ /* Return info from the table */
+ return nand_isbad_bbt(mtd, ofs, allowbbt);
+}
+
+/*
+ * Wait for the ready pin, after a command
+ * The timeout is catched later.
+ */
+void nand_wait_ready(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ uint64_t start = get_time_ns();
+
+ led_trigger_event(nand_led_trigger, LED_FULL);
+ /* wait until command is processed or timeout occures */
+ do {
+ if (chip->dev_ready(mtd))
+ break;
+ } while (!is_timeout(start, SECOND * 2));
+ led_trigger_event(nand_led_trigger, LED_OFF);
+}
+EXPORT_SYMBOL(nand_wait_ready);
+
+/**
+ * nand_command - [DEFAULT] Send command to NAND device
+ * @mtd: MTD device structure
+ * @command: the command to be sent
+ * @column: the column address for this command, -1 if none
+ * @page_addr: the page address for this command, -1 if none
+ *
+ * Send command to NAND device. This function is used for small page
+ * devices (256/512 Bytes per page)
+ */
+static void nand_command(struct mtd_info *mtd, unsigned int command,
+ int column, int page_addr)
+{
+ register struct nand_chip *chip = mtd->priv;
+ int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE;
+
+ /*
+ * Write out the command to the device.
+ */
+ if (command == NAND_CMD_SEQIN) {
+ int readcmd;
+
+ if (column >= mtd->writesize) {
+ /* OOB area */
+ column -= mtd->writesize;
+ readcmd = NAND_CMD_READOOB;
+ } else if (column < 256) {
+ /* First 256 bytes --> READ0 */
+ readcmd = NAND_CMD_READ0;
+ } else {
+ column -= 256;
+ readcmd = NAND_CMD_READ1;
+ }
+ chip->cmd_ctrl(mtd, readcmd, ctrl);
+ ctrl &= ~NAND_CTRL_CHANGE;
+ }
+ chip->cmd_ctrl(mtd, command, ctrl);
+
+ /*
+ * Address cycle, when necessary
+ */
+ ctrl = NAND_CTRL_ALE | NAND_CTRL_CHANGE;
+ /* Serially input address */
+ if (column != -1) {
+ /* Adjust columns for 16 bit buswidth */
+ if (chip->options & NAND_BUSWIDTH_16)
+ column >>= 1;
+ chip->cmd_ctrl(mtd, column, ctrl);
+ ctrl &= ~NAND_CTRL_CHANGE;
+ }
+ if (page_addr != -1) {
+ chip->cmd_ctrl(mtd, page_addr, ctrl);
+ ctrl &= ~NAND_CTRL_CHANGE;
+ chip->cmd_ctrl(mtd, page_addr >> 8, ctrl);
+ /* One more address cycle for devices > 32MiB */
+ if (chip->chipsize > (32 << 20))
+ chip->cmd_ctrl(mtd, page_addr >> 16, ctrl);
+ }
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
+
+ /*
+ * program and erase have their own busy handlers
+ * status and sequential in needs no delay
+ */
+ switch (command) {
+
+ case NAND_CMD_PAGEPROG:
+ case NAND_CMD_ERASE1:
+ case NAND_CMD_ERASE2:
+ case NAND_CMD_SEQIN:
+ case NAND_CMD_STATUS:
+ return;
+
+ case NAND_CMD_RESET:
+ if (chip->dev_ready)
+ break;
+ udelay(chip->chip_delay);
+ chip->cmd_ctrl(mtd, NAND_CMD_STATUS,
+ NAND_CTRL_CLE | NAND_CTRL_CHANGE);
+ chip->cmd_ctrl(mtd,
+ NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
+ while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ;
+ return;
+
+ /* This applies to read commands */
+ default:
+ /*
+ * If we don't have access to the busy pin, we apply the given
+ * command delay
+ */
+ if (!chip->dev_ready) {
+ udelay(chip->chip_delay);
+ return;
+ }
+ }
+ /* Apply this short delay always to ensure that we do wait tWB in
+ * any case on any machine. */
+ ndelay(100);
+
+ nand_wait_ready(mtd);
+}
+
+/**
+ * nand_command_lp - [DEFAULT] Send command to NAND large page device
+ * @mtd: MTD device structure
+ * @command: the command to be sent
+ * @column: the column address for this command, -1 if none
+ * @page_addr: the page address for this command, -1 if none
+ *
+ * Send command to NAND device. This is the version for the new large page
+ * devices We dont have the separate regions as we have in the small page
+ * devices. We must emulate NAND_CMD_READOOB to keep the code compatible.
+ */
+static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
+ int column, int page_addr)
+{
+ register struct nand_chip *chip = mtd->priv;
+
+ /* Emulate NAND_CMD_READOOB */
+ if (command == NAND_CMD_READOOB) {
+ column += mtd->writesize;
+ command = NAND_CMD_READ0;
+ }
+
+ /* Command latch cycle */
+ chip->cmd_ctrl(mtd, command & 0xff,
+ NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
+
+ if (column != -1 || page_addr != -1) {
+ int ctrl = NAND_CTRL_CHANGE | NAND_NCE | NAND_ALE;
+
+ /* Serially input address */
+ if (column != -1) {
+ /* Adjust columns for 16 bit buswidth */
+ if (chip->options & NAND_BUSWIDTH_16)
+ column >>= 1;
+ chip->cmd_ctrl(mtd, column, ctrl);
+ ctrl &= ~NAND_CTRL_CHANGE;
+ chip->cmd_ctrl(mtd, column >> 8, ctrl);
+ }
+ if (page_addr != -1) {
+ chip->cmd_ctrl(mtd, page_addr, ctrl);
+ chip->cmd_ctrl(mtd, page_addr >> 8,
+ NAND_NCE | NAND_ALE);
+ /* One more address cycle for devices > 128MiB */
+ if (chip->chipsize > (128 << 20))
+ chip->cmd_ctrl(mtd, page_addr >> 16,
+ NAND_NCE | NAND_ALE);
+ }
+ }
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
+
+ /*
+ * program and erase have their own busy handlers
+ * status, sequential in, and deplete1 need no delay
+ */
+ switch (command) {
+
+ case NAND_CMD_CACHEDPROG:
+ case NAND_CMD_PAGEPROG:
+ case NAND_CMD_ERASE1:
+ case NAND_CMD_ERASE2:
+ case NAND_CMD_SEQIN:
+ case NAND_CMD_RNDIN:
+ case NAND_CMD_STATUS:
+ case NAND_CMD_DEPLETE1:
+ return;
+
+ /*
+ * read error status commands require only a short delay
+ */
+ case NAND_CMD_STATUS_ERROR:
+ case NAND_CMD_STATUS_ERROR0:
+ case NAND_CMD_STATUS_ERROR1:
+ case NAND_CMD_STATUS_ERROR2:
+ case NAND_CMD_STATUS_ERROR3:
+ udelay(chip->chip_delay);
+ return;
+
+ case NAND_CMD_RESET:
+ if (chip->dev_ready)
+ break;
+ udelay(chip->chip_delay);
+ chip->cmd_ctrl(mtd, NAND_CMD_STATUS,
+ NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE,
+ NAND_NCE | NAND_CTRL_CHANGE);
+ while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ;
+ return;
+
+ case NAND_CMD_RNDOUT:
+ /* No ready / busy check necessary */
+ chip->cmd_ctrl(mtd, NAND_CMD_RNDOUTSTART,
+ NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE,
+ NAND_NCE | NAND_CTRL_CHANGE);
+ return;
+
+ case NAND_CMD_READ0:
+ chip->cmd_ctrl(mtd, NAND_CMD_READSTART,
+ NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE,
+ NAND_NCE | NAND_CTRL_CHANGE);
+
+ /* This applies to read commands */
+ default:
+ /*
+ * If we don't have access to the busy pin, we apply the given
+ * command delay
+ */
+ if (!chip->dev_ready) {
+ udelay(chip->chip_delay);
+ return;
+ }
+ }
+
+ /* Apply this short delay always to ensure that we do wait tWB in
+ * any case on any machine. */
+ ndelay(100);
+
+ nand_wait_ready(mtd);
+}
+
+/**
+ * nand_get_device - [GENERIC] Get chip for selected access
+ * @chip: the nand chip descriptor
+ * @mtd: MTD device structure
+ * @new_state: the state which is requested
+ *
+ * Get the device and lock it for exclusive access
+ */
+static int
+nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state)
+{
+ retry:
+ /* Hardware controller shared among independend devices */
+ if (!chip->controller->active)
+ chip->controller->active = chip;
+
+ if (chip->controller->active == chip && chip->state == FL_READY) {
+ chip->state = new_state;
+ return 0;
+ }
+ if (new_state == FL_PM_SUSPENDED) {
+ return (chip->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN;
+ }
+ goto retry;
+}
+
+/**
+ * nand_wait - [DEFAULT] wait until the command is done
+ * @mtd: MTD device structure
+ * @chip: NAND chip structure
+ *
+ * Wait for command done. This applies to erase and program only
+ * Erase can take up to 400ms and program up to 20ms according to
+ * general NAND and SmartMedia specs
+ */
+static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip)
+{
+
+ uint64_t start = get_time_ns();
+ uint64_t timeo;
+ int status, state = chip->state;
+
+ if (state == FL_ERASING)
+ timeo = 400 * MSECOND;
+ else
+ timeo = 20 * MSECOND;
+
+ led_trigger_event(nand_led_trigger, LED_FULL);
+
+ /* Apply this short delay always to ensure that we do wait tWB in
+ * any case on any machine. */
+ ndelay(100);
+
+ if ((state == FL_ERASING) && (chip->options & NAND_IS_AND))
+ chip->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1);
+ else
+ chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
+
+ while (!is_timeout(start, timeo)) {
+ if (chip->dev_ready) {
+ if (chip->dev_ready(mtd))
+ break;
+ } else {
+ if (chip->read_byte(mtd) & NAND_STATUS_READY)
+ break;
+ }
+ }
+ led_trigger_event(nand_led_trigger, LED_OFF);
+
+ status = (int)chip->read_byte(mtd);
+ return status;
+}
+
+/**
+ * nand_read_page_raw - [Intern] read raw page data without ecc
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: buffer to store read data
+ */
+static int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf)
+{
+ chip->read_buf(mtd, buf, mtd->writesize);
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
+ return 0;
+}
+
+/**
+ * nand_read_page_swecc - [REPLACABLE] software ecc based page read function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: buffer to store read data
+ */
+static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *p = buf;
+ uint8_t *ecc_calc = chip->buffers->ecccalc;
+ uint8_t *ecc_code = chip->buffers->ecccode;
+ uint32_t *eccpos = chip->ecc.layout->eccpos;
+
+ chip->ecc.read_page_raw(mtd, chip, buf);
+
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
+ chip->ecc.calculate(mtd, p, &ecc_calc[i]);
+
+ for (i = 0; i < chip->ecc.total; i++)
+ ecc_code[i] = chip->oob_poi[eccpos[i]];
+
+ eccsteps = chip->ecc.steps;
+ p = buf;
+
+ for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ int stat;
+
+ stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
+ if (stat < 0)
+ mtd->ecc_stats.failed++;
+ else
+ mtd->ecc_stats.corrected += stat;
+ }
+ return 0;
+}
+
+/**
+ * nand_read_page_hwecc - [REPLACABLE] hardware ecc based page read function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: buffer to store read data
+ *
+ * Not for syndrome calculating ecc controllers which need a special oob layout
+ */
+static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *p = buf;
+ uint8_t *ecc_calc = chip->buffers->ecccalc;
+ uint8_t *ecc_code = chip->buffers->ecccode;
+ uint32_t *eccpos = chip->ecc.layout->eccpos;
+
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ chip->ecc.hwctl(mtd, NAND_ECC_READ);
+ chip->read_buf(mtd, p, eccsize);
+ chip->ecc.calculate(mtd, p, &ecc_calc[i]);
+ }
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ for (i = 0; i < chip->ecc.total; i++)
+ ecc_code[i] = chip->oob_poi[eccpos[i]];
+
+ eccsteps = chip->ecc.steps;
+ p = buf;
+
+ for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ int stat;
+
+ stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
+ if (stat < 0)
+ mtd->ecc_stats.failed++;
+ else
+ mtd->ecc_stats.corrected += stat;
+ }
+ return 0;
+}
+
+/**
+ * nand_read_page_syndrome - [REPLACABLE] hardware ecc syndrom based page read
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: buffer to store read data
+ *
+ * The hw generator calculates the error syndrome automatically. Therefor
+ * we need a special oob layout and handling.
+ */
+static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *p = buf;
+ uint8_t *oob = chip->oob_poi;
+
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ int stat;
+
+ chip->ecc.hwctl(mtd, NAND_ECC_READ);
+ chip->read_buf(mtd, p, eccsize);
+
+ if (chip->ecc.prepad) {
+ chip->read_buf(mtd, oob, chip->ecc.prepad);
+ oob += chip->ecc.prepad;
+ }
+
+ chip->ecc.hwctl(mtd, NAND_ECC_READSYN);
+ chip->read_buf(mtd, oob, eccbytes);
+ stat = chip->ecc.correct(mtd, p, oob, NULL);
+
+ if (stat < 0)
+ mtd->ecc_stats.failed++;
+ else
+ mtd->ecc_stats.corrected += stat;
+
+ oob += eccbytes;
+
+ if (chip->ecc.postpad) {
+ chip->read_buf(mtd, oob, chip->ecc.postpad);
+ oob += chip->ecc.postpad;
+ }
+ }
+
+ /* Calculate remaining oob bytes */
+ i = mtd->oobsize - (oob - chip->oob_poi);
+ if (i)
+ chip->read_buf(mtd, oob, i);
+
+ return 0;
+}
+
+/**
+ * nand_transfer_oob - [Internal] Transfer oob to client buffer
+ * @chip: nand chip structure
+ * @oob: oob destination address
+ * @ops: oob ops structure
+ * @len: size of oob to transfer
+ */
+static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob,
+ struct mtd_oob_ops *ops, size_t len)
+{
+ switch(ops->mode) {
+
+ case MTD_OOB_PLACE:
+ case MTD_OOB_RAW:
+ memcpy(oob, chip->oob_poi + ops->ooboffs, len);
+ return oob + len;
+
+ case MTD_OOB_AUTO: {
+ struct nand_oobfree *free = chip->ecc.layout->oobfree;
+ uint32_t boffs = 0, roffs = ops->ooboffs;
+ size_t bytes = 0;
+
+ for(; free->length && len; free++, len -= bytes) {
+ /* Read request not from offset 0 ? */
+ if (unlikely(roffs)) {
+ if (roffs >= free->length) {
+ roffs -= free->length;
+ continue;
+ }
+ boffs = free->offset + roffs;
+ bytes = min_t(size_t, len,
+ (free->length - roffs));
+ roffs = 0;
+ } else {
+ bytes = min_t(size_t, len, free->length);
+ boffs = free->offset;
+ }
+ memcpy(oob, chip->oob_poi + boffs, bytes);
+ oob += bytes;
+ }
+ return oob;
+ }
+ default:
+ BUG();
+ }
+ return NULL;
+}
+
+/**
+ * nand_do_read_ops - [Internal] Read data with ECC
+ *
+ * @mtd: MTD device structure
+ * @from: offset to read from
+ * @ops: oob ops structure
+ *
+ * Internal function. Called with chip held.
+ */
+static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
+{
+ int chipnr, page, realpage, col, bytes, aligned;
+ struct nand_chip *chip = mtd->priv;
+ struct mtd_ecc_stats stats;
+ int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
+ int sndcmd = 1;
+ int ret = 0;
+ uint32_t readlen = ops->len;
+ uint32_t oobreadlen = ops->ooblen;
+ uint8_t *bufpoi, *oob, *buf;
+
+ stats = mtd->ecc_stats;
+
+ chipnr = (int)(from >> chip->chip_shift);
+ chip->select_chip(mtd, chipnr);
+
+ realpage = (int)(from >> chip->page_shift);
+ page = realpage & chip->pagemask;
+
+ col = (int)(from & (mtd->writesize - 1));
+
+ buf = ops->datbuf;
+ oob = ops->oobbuf;
+
+ while(1) {
+ bytes = min(mtd->writesize - col, readlen);
+ aligned = (bytes == mtd->writesize);
+
+ /* Is the current page in the buffer ? */
+ if (realpage != chip->pagebuf || oob) {
+ bufpoi = aligned ? buf : chip->buffers->databuf;
+
+ if (likely(sndcmd)) {
+ chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
+ sndcmd = 0;
+ }
+
+ /* Now read the page into the buffer */
+ if (unlikely(ops->mode == MTD_OOB_RAW))
+ ret = chip->ecc.read_page_raw(mtd, chip, bufpoi);
+ else
+ ret = chip->ecc.read_page(mtd, chip, bufpoi);
+ if (ret < 0)
+ break;
+
+ /* Transfer not aligned data */
+ if (!aligned) {
+ chip->pagebuf = realpage;
+ memcpy(buf, chip->buffers->databuf + col, bytes);
+ }
+
+ buf += bytes;
+
+ if (unlikely(oob)) {
+ /* Raw mode does data:oob:data:oob */
+ if (ops->mode != MTD_OOB_RAW) {
+ int toread = min(oobreadlen,
+ chip->ecc.layout->oobavail);
+ if (toread) {
+ oob = nand_transfer_oob(chip,
+ oob, ops, toread);
+ oobreadlen -= toread;
+ }
+ } else
+ buf = nand_transfer_oob(chip,
+ buf, ops, mtd->oobsize);
+ }
+
+ if (!(chip->options & NAND_NO_READRDY)) {
+ /*
+ * Apply delay or wait for ready/busy pin. Do
+ * this before the AUTOINCR check, so no
+ * problems arise if a chip which does auto
+ * increment is marked as NOAUTOINCR by the
+ * board driver.
+ */
+ if (!chip->dev_ready)
+ udelay(chip->chip_delay);
+ else
+ nand_wait_ready(mtd);
+ }
+ } else {
+ memcpy(buf, chip->buffers->databuf + col, bytes);
+ buf += bytes;
+ }
+
+ readlen -= bytes;
+
+ if (!readlen)
+ break;
+
+ /* For subsequent reads align to page boundary. */
+ col = 0;
+ /* Increment page address */
+ realpage++;
+
+ page = realpage & chip->pagemask;
+ /* Check, if we cross a chip boundary */
+ if (!page) {
+ chipnr++;
+ chip->select_chip(mtd, -1);
+ chip->select_chip(mtd, chipnr);
+ }
+
+ /* Check, if the chip supports auto page increment
+ * or if we have hit a block boundary.
+ */
+ if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck))
+ sndcmd = 1;
+ }
+
+ ops->retlen = ops->len - (size_t) readlen;
+ if (oob)
+ ops->oobretlen = ops->ooblen - oobreadlen;
+
+ if (ret)
+ return ret;
+
+ if (mtd->ecc_stats.failed - stats.failed)
+ return -EBADMSG;
+
+ return 0;
+}
+
+/**
+ * nand_read - [MTD Interface] MTD compability function for nand_do_read_ecc
+ * @mtd: MTD device structure
+ * @from: offset to read from
+ * @len: number of bytes to read
+ * @retlen: pointer to variable to store the number of read bytes
+ * @buf: the databuffer to put data
+ *
+ * Get hold of the chip and call nand_do_read
+ */
+static int nand_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, uint8_t *buf)
+{
+ struct nand_chip *chip = mtd->priv;
+ int ret;
+
+ /* Do not allow reads past end of device */
+ if ((from + len) > mtd->size)
+ return -EINVAL;
+ if (!len)
+ return 0;
+
+ nand_get_device(chip, mtd, FL_READING);
+
+ chip->ops.len = len;
+ chip->ops.datbuf = buf;
+ chip->ops.oobbuf = NULL;
+
+ ret = nand_do_read_ops(mtd, from, &chip->ops);
+
+ *retlen = chip->ops.retlen;
+
+ nand_release_device(mtd);
+
+ return ret;
+}
+
+/**
+ * nand_read_oob_std - [REPLACABLE] the most common OOB data read function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @page: page number to read
+ * @sndcmd: flag whether to issue read command or not
+ */
+static int nand_read_oob_std(struct mtd_info *mtd, struct nand_chip *chip,
+ int page, int sndcmd)
+{
+ if (sndcmd) {
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
+ sndcmd = 0;
+ }
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
+ return sndcmd;
+}
+
+/**
+ * nand_read_oob_syndrome - [REPLACABLE] OOB data read function for HW ECC
+ * with syndromes
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @page: page number to read
+ * @sndcmd: flag whether to issue read command or not
+ */
+static int nand_read_oob_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
+ int page, int sndcmd)
+{
+ uint8_t *buf = chip->oob_poi;
+ int length = mtd->oobsize;
+ int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad;
+ int eccsize = chip->ecc.size;
+ uint8_t *bufpoi = buf;
+ int i, toread, sndrnd = 0, pos;
+
+ chip->cmdfunc(mtd, NAND_CMD_READ0, chip->ecc.size, page);
+ for (i = 0; i < chip->ecc.steps; i++) {
+ if (sndrnd) {
+ pos = eccsize + i * (eccsize + chunk);
+ if (mtd->writesize > 512)
+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT, pos, -1);
+ else
+ chip->cmdfunc(mtd, NAND_CMD_READ0, pos, page);
+ } else
+ sndrnd = 1;
+ toread = min_t(int, length, chunk);
+ chip->read_buf(mtd, bufpoi, toread);
+ bufpoi += toread;
+ length -= toread;
+ }
+ if (length > 0)
+ chip->read_buf(mtd, bufpoi, length);
+
+ return 1;
+}
+
+/**
+ * nand_write_oob_std - [REPLACABLE] the most common OOB data write function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @page: page number to write
+ */
+static int nand_write_oob_std(struct mtd_info *mtd, struct nand_chip *chip,
+ int page)
+{
+ int status = 0;
+ const uint8_t *buf = chip->oob_poi;
+ int length = mtd->oobsize;
+
+ chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page);
+ chip->write_buf(mtd, buf, length);
+ /* Send command to program the OOB data */
+ chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+
+ status = chip->waitfunc(mtd, chip);
+
+ return status & NAND_STATUS_FAIL ? -EIO : 0;
+}
+
+/**
+ * nand_write_oob_syndrome - [REPLACABLE] OOB data write function for HW ECC
+ * with syndrome - only for large page flash !
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @page: page number to write
+ */
+static int nand_write_oob_syndrome(struct mtd_info *mtd,
+ struct nand_chip *chip, int page)
+{
+ int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad;
+ int eccsize = chip->ecc.size, length = mtd->oobsize;
+ int i, len, pos, status = 0, sndcmd = 0, steps = chip->ecc.steps;
+ const uint8_t *bufpoi = chip->oob_poi;
+
+ /*
+ * data-ecc-data-ecc ... ecc-oob
+ * or
+ * data-pad-ecc-pad-data-pad .... ecc-pad-oob
+ */
+ if (!chip->ecc.prepad && !chip->ecc.postpad) {
+ pos = steps * (eccsize + chunk);
+ steps = 0;
+ } else
+ pos = eccsize;
+
+ chip->cmdfunc(mtd, NAND_CMD_SEQIN, pos, page);
+ for (i = 0; i < steps; i++) {
+ if (sndcmd) {
+ if (mtd->writesize <= 512) {
+ uint32_t fill = 0xFFFFFFFF;
+
+ len = eccsize;
+ while (len > 0) {
+ int num = min_t(int, len, 4);
+ chip->write_buf(mtd, (uint8_t *)&fill,
+ num);
+ len -= num;
+ }
+ } else {
+ pos = eccsize + i * (eccsize + chunk);
+ chip->cmdfunc(mtd, NAND_CMD_RNDIN, pos, -1);
+ }
+ } else
+ sndcmd = 1;
+ len = min_t(int, length, chunk);
+ chip->write_buf(mtd, bufpoi, len);
+ bufpoi += len;
+ length -= len;
+ }
+ if (length > 0)
+ chip->write_buf(mtd, bufpoi, length);
+
+ chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+ status = chip->waitfunc(mtd, chip);
+
+ return status & NAND_STATUS_FAIL ? -EIO : 0;
+}
+
+/**
+ * nand_do_read_oob - [Intern] NAND read out-of-band
+ * @mtd: MTD device structure
+ * @from: offset to read from
+ * @ops: oob operations description structure
+ *
+ * NAND read out-of-band data from the spare area
+ */
+static int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
+{
+ int page, realpage, chipnr, sndcmd = 1;
+ struct nand_chip *chip = mtd->priv;
+ int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
+ int readlen = ops->ooblen;
+ int len;
+ uint8_t *buf = ops->oobbuf;
+
+ MTD_DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08Lx, len = %i\n",
+ (unsigned long long)from, readlen);
+
+ if (ops->mode == MTD_OOB_AUTO)
+ len = chip->ecc.layout->oobavail;
+ else
+ len = mtd->oobsize;
+
+ if (unlikely(ops->ooboffs >= len)) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
+ "Attempt to start read outside oob\n");
+ return -EINVAL;
+ }
+
+ /* Do not allow reads past end of device */
+ if (unlikely(from >= mtd->size ||
+ ops->ooboffs + readlen > ((mtd->size >> chip->page_shift) -
+ (from >> chip->page_shift)) * len)) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
+ "Attempt read beyond end of device\n");
+ return -EINVAL;
+ }
+
+ chipnr = (int)(from >> chip->chip_shift);
+ chip->select_chip(mtd, chipnr);
+
+ /* Shift to get page */
+ realpage = (int)(from >> chip->page_shift);
+ page = realpage & chip->pagemask;
+
+ while(1) {
+ sndcmd = chip->ecc.read_oob(mtd, chip, page, sndcmd);
+
+ len = min(len, readlen);
+ buf = nand_transfer_oob(chip, buf, ops, len);
+
+ if (!(chip->options & NAND_NO_READRDY)) {
+ /*
+ * Apply delay or wait for ready/busy pin. Do this
+ * before the AUTOINCR check, so no problems arise if a
+ * chip which does auto increment is marked as
+ * NOAUTOINCR by the board driver.
+ */
+ if (!chip->dev_ready)
+ udelay(chip->chip_delay);
+ else
+ nand_wait_ready(mtd);
+ }
+
+ readlen -= len;
+ if (!readlen)
+ break;
+
+ /* Increment page address */
+ realpage++;
+
+ page = realpage & chip->pagemask;
+ /* Check, if we cross a chip boundary */
+ if (!page) {
+ chipnr++;
+ chip->select_chip(mtd, -1);
+ chip->select_chip(mtd, chipnr);
+ }
+
+ /* Check, if the chip supports auto page increment
+ * or if we have hit a block boundary.
+ */
+ if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck))
+ sndcmd = 1;
+ }
+
+ ops->oobretlen = ops->ooblen;
+ return 0;
+}
+
+/**
+ * nand_read_oob - [MTD Interface] NAND read data and/or out-of-band
+ * @mtd: MTD device structure
+ * @from: offset to read from
+ * @ops: oob operation description structure
+ *
+ * NAND read data and/or out-of-band data
+ */
+static int nand_read_oob(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
+{
+ struct nand_chip *chip = mtd->priv;
+ int ret = -ENOSYS;
+
+ ops->retlen = 0;
+
+ /* Do not allow reads past end of device */
+ if (ops->datbuf && (from + ops->len) > mtd->size) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
+ "Attempt read beyond end of device\n");
+ return -EINVAL;
+ }
+
+ nand_get_device(chip, mtd, FL_READING);
+
+ switch(ops->mode) {
+ case MTD_OOB_PLACE:
+ case MTD_OOB_AUTO:
+ case MTD_OOB_RAW:
+ break;
+
+ default:
+ goto out;
+ }
+
+ if (!ops->datbuf)
+ ret = nand_do_read_oob(mtd, from, ops);
+ else
+ ret = nand_do_read_ops(mtd, from, ops);
+
+ out:
+ nand_release_device(mtd);
+ return ret;
+}
+
+
+/**
+ * nand_write_page_raw - [Intern] raw page write function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: data buffer
+ */
+static void nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf)
+{
+ chip->write_buf(mtd, buf, mtd->writesize);
+ chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
+}
+
+/**
+ * nand_write_page_swecc - [REPLACABLE] software ecc based page write function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: data buffer
+ */
+static void nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *ecc_calc = chip->buffers->ecccalc;
+ const uint8_t *p = buf;
+ uint32_t *eccpos = chip->ecc.layout->eccpos;
+
+ /* Software ecc calculation */
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
+ chip->ecc.calculate(mtd, p, &ecc_calc[i]);
+
+ for (i = 0; i < chip->ecc.total; i++)
+ chip->oob_poi[eccpos[i]] = ecc_calc[i];
+
+ chip->ecc.write_page_raw(mtd, chip, buf);
+}
+
+/**
+ * nand_write_page_hwecc - [REPLACABLE] hardware ecc based page write function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: data buffer
+ */
+static void nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *ecc_calc = chip->buffers->ecccalc;
+ const uint8_t *p = buf;
+ uint32_t *eccpos = chip->ecc.layout->eccpos;
+
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
+ chip->write_buf(mtd, p, eccsize);
+ chip->ecc.calculate(mtd, p, &ecc_calc[i]);
+ }
+
+ for (i = 0; i < chip->ecc.total; i++)
+ chip->oob_poi[eccpos[i]] = ecc_calc[i];
+
+ chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
+}
+
+/**
+ * nand_write_page_syndrome - [REPLACABLE] hardware ecc syndrom based page write
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: data buffer
+ *
+ * The hw generator calculates the error syndrome automatically. Therefor
+ * we need a special oob layout and handling.
+ */
+static void nand_write_page_syndrome(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ const uint8_t *p = buf;
+ uint8_t *oob = chip->oob_poi;
+
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+
+ chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
+ chip->write_buf(mtd, p, eccsize);
+
+ if (chip->ecc.prepad) {
+ chip->write_buf(mtd, oob, chip->ecc.prepad);
+ oob += chip->ecc.prepad;
+ }
+
+ chip->ecc.calculate(mtd, p, oob);
+ chip->write_buf(mtd, oob, eccbytes);
+ oob += eccbytes;
+
+ if (chip->ecc.postpad) {
+ chip->write_buf(mtd, oob, chip->ecc.postpad);
+ oob += chip->ecc.postpad;
+ }
+ }
+
+ /* Calculate remaining oob bytes */
+ i = mtd->oobsize - (oob - chip->oob_poi);
+ if (i)
+ chip->write_buf(mtd, oob, i);
+}
+
+/**
+ * nand_write_page - [REPLACEABLE] write one page
+ * @mtd: MTD device structure
+ * @chip: NAND chip descriptor
+ * @buf: the data to write
+ * @page: page number to write
+ * @cached: cached programming
+ * @raw: use _raw version of write_page
+ */
+static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf, int page, int cached, int raw)
+{
+ int status;
+
+ chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
+
+ if (unlikely(raw))
+ chip->ecc.write_page_raw(mtd, chip, buf);
+ else
+ chip->ecc.write_page(mtd, chip, buf);
+
+ /*
+ * Cached progamming disabled for now, Not sure if its worth the
+ * trouble. The speed gain is not very impressive. (2.3->2.6Mib/s)
+ */
+ cached = 0;
+
+ if (!cached || !(chip->options & NAND_CACHEPRG)) {
+
+ chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+ status = chip->waitfunc(mtd, chip);
+ /*
+ * See if operation failed and additional status checks are
+ * available
+ */
+ if ((status & NAND_STATUS_FAIL) && (chip->errstat))
+ status = chip->errstat(mtd, chip, FL_WRITING, status,
+ page);
+
+ if (status & NAND_STATUS_FAIL) {
+ return -EIO;
+ }
+ } else {
+ chip->cmdfunc(mtd, NAND_CMD_CACHEDPROG, -1, -1);
+ status = chip->waitfunc(mtd, chip);
+ }
+
+#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
+ /* Send command to read back the data */
+ chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
+
+ if (chip->verify_buf(mtd, buf, mtd->writesize))
+ return -EIO;
+#endif
+ return 0;
+}
+
+/**
+ * nand_fill_oob - [Internal] Transfer client buffer to oob
+ * @chip: nand chip structure
+ * @oob: oob data buffer
+ * @ops: oob ops structure
+ */
+static uint8_t *nand_fill_oob(struct nand_chip *chip, uint8_t *oob,
+ struct mtd_oob_ops *ops)
+{
+ size_t len = ops->ooblen;
+
+ switch(ops->mode) {
+
+ case MTD_OOB_PLACE:
+ case MTD_OOB_RAW:
+ memcpy(chip->oob_poi + ops->ooboffs, oob, len);
+ return oob + len;
+
+ case MTD_OOB_AUTO: {
+ struct nand_oobfree *free = chip->ecc.layout->oobfree;
+ uint32_t boffs = 0, woffs = ops->ooboffs;
+ size_t bytes = 0;
+
+ for(; free->length && len; free++, len -= bytes) {
+ /* Write request not from offset 0 ? */
+ if (unlikely(woffs)) {
+ if (woffs >= free->length) {
+ woffs -= free->length;
+ continue;
+ }
+ boffs = free->offset + woffs;
+ bytes = min_t(size_t, len,
+ (free->length - woffs));
+ woffs = 0;
+ } else {
+ bytes = min_t(size_t, len, free->length);
+ boffs = free->offset;
+ }
+ memcpy(chip->oob_poi + boffs, oob, bytes);
+ oob += bytes;
+ }
+ return oob;
+ }
+ default:
+ BUG();
+ }
+ return NULL;
+}
+
+#define NOTALIGNED(x) (x & (chip->subpagesize - 1)) != 0
+
+/**
+ * nand_do_write_ops - [Internal] NAND write with ECC
+ * @mtd: MTD device structure
+ * @to: offset to write to
+ * @ops: oob operations description structure
+ *
+ * NAND write with ECC
+ */
+static int nand_do_write_ops(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
+{
+ int chipnr, realpage, page, blockmask, column;
+ struct nand_chip *chip = mtd->priv;
+ uint32_t writelen = ops->len;
+ uint8_t *oob = ops->oobbuf;
+ uint8_t *buf = ops->datbuf;
+ int ret, subpage;
+
+ ops->retlen = 0;
+ if (!writelen)
+ return 0;
+
+ /* reject writes, which are not page aligned */
+ if (NOTALIGNED(to) || NOTALIGNED(ops->len)) {
+ printk(KERN_NOTICE "nand_write: "
+ "Attempt to write not page aligned data\n");
+ return -EINVAL;
+ }
+
+ column = to & (mtd->writesize - 1);
+ subpage = column || (writelen & (mtd->writesize - 1));
+
+ if (subpage && oob)
+ return -EINVAL;
+
+ chipnr = (int)(to >> chip->chip_shift);
+ chip->select_chip(mtd, chipnr);
+
+ /* Check, if it is write protected */
+ if (nand_check_wp(mtd)) {
+ return -EIO;
+ }
+
+ realpage = (int)(to >> chip->page_shift);
+ page = realpage & chip->pagemask;
+ blockmask = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
+
+ /* Invalidate the page cache, when we write to the cached page */
+ if (to <= (chip->pagebuf << chip->page_shift) &&
+ (chip->pagebuf << chip->page_shift) < (to + ops->len))
+ chip->pagebuf = -1;
+
+ /* If we're not given explicit OOB data, let it be 0xFF */
+ if (likely(!oob))
+ memset(chip->oob_poi, 0xff, mtd->oobsize);
+
+ while(1) {
+ int bytes = mtd->writesize;
+ int cached = writelen > bytes && page != blockmask;
+ uint8_t *wbuf = buf;
+
+ /* Partial page write ? */
+ if (unlikely(column || writelen < (mtd->writesize - 1))) {
+ cached = 0;
+ bytes = min_t(int, bytes - column, (int) writelen);
+ chip->pagebuf = -1;
+ memset(chip->buffers->databuf, 0xff, mtd->writesize);
+ memcpy(&chip->buffers->databuf[column], buf, bytes);
+ wbuf = chip->buffers->databuf;
+ }
+
+ if (unlikely(oob))
+ oob = nand_fill_oob(chip, oob, ops);
+
+ ret = chip->write_page(mtd, chip, wbuf, page, cached,
+ (ops->mode == MTD_OOB_RAW));
+ if (ret)
+ break;
+
+ writelen -= bytes;
+ if (!writelen)
+ break;
+
+ column = 0;
+ buf += bytes;
+ realpage++;
+
+ page = realpage & chip->pagemask;
+ /* Check, if we cross a chip boundary */
+ if (!page) {
+ chipnr++;
+ chip->select_chip(mtd, -1);
+ chip->select_chip(mtd, chipnr);
+ }
+ }
+
+ ops->retlen = ops->len - writelen;
+ if (unlikely(oob))
+ ops->oobretlen = ops->ooblen;
+ return ret;
+}
+
+/**
+ * nand_write - [MTD Interface] NAND write with ECC
+ * @mtd: MTD device structure
+ * @to: offset to write to
+ * @len: number of bytes to write
+ * @retlen: pointer to variable to store the number of written bytes
+ * @buf: the data to write
+ *
+ * NAND write with ECC
+ */
+static int nand_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const uint8_t *buf)
+{
+ struct nand_chip *chip = mtd->priv;
+ int ret;
+
+ /* Do not allow reads past end of device */
+ if ((to + len) > mtd->size)
+ return -EINVAL;
+ if (!len)
+ return 0;
+
+ nand_get_device(chip, mtd, FL_WRITING);
+
+ chip->ops.len = len;
+ chip->ops.datbuf = (uint8_t *)buf;
+ chip->ops.oobbuf = NULL;
+
+ ret = nand_do_write_ops(mtd, to, &chip->ops);
+
+ *retlen = chip->ops.retlen;
+
+ nand_release_device(mtd);
+
+ return ret;
+}
+
+/**
+ * nand_do_write_oob - [MTD Interface] NAND write out-of-band
+ * @mtd: MTD device structure
+ * @to: offset to write to
+ * @ops: oob operation description structure
+ *
+ * NAND write out-of-band
+ */
+static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
+{
+ int chipnr, page, status, len;
+ struct nand_chip *chip = mtd->priv;
+
+ MTD_DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n",
+ (unsigned int)to, (int)ops->ooblen);
+
+ if (ops->mode == MTD_OOB_AUTO)
+ len = chip->ecc.layout->oobavail;
+ else
+ len = mtd->oobsize;
+
+ /* Do not allow write past end of page */
+ if ((ops->ooboffs + ops->ooblen) > len) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: "
+ "Attempt to write past end of page\n");
+ return -EINVAL;
+ }
+
+ if (unlikely(ops->ooboffs >= len)) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
+ "Attempt to start write outside oob\n");
+ return -EINVAL;
+ }
+
+ /* Do not allow reads past end of device */
+ if (unlikely(to >= mtd->size ||
+ ops->ooboffs + ops->ooblen >
+ ((mtd->size >> chip->page_shift) -
+ (to >> chip->page_shift)) * len)) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
+ "Attempt write beyond end of device\n");
+ return -EINVAL;
+ }
+
+ chipnr = (int)(to >> chip->chip_shift);
+ chip->select_chip(mtd, chipnr);
+
+ /* Shift to get page */
+ page = (int)(to >> chip->page_shift);
+
+ /*
+ * Reset the chip. Some chips (like the Toshiba TC5832DC found in one
+ * of my DiskOnChip 2000 test units) will clear the whole data page too
+ * if we don't do this. I have no clue why, but I seem to have 'fixed'
+ * it in the doc2000 driver in August 1999. dwmw2.
+ */
+ chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+
+ /* Check, if it is write protected */
+ if (nand_check_wp(mtd))
+ return -EROFS;
+
+ /* Invalidate the page cache, if we write to the cached page */
+ if (page == chip->pagebuf)
+ chip->pagebuf = -1;
+
+ memset(chip->oob_poi, 0xff, mtd->oobsize);
+ nand_fill_oob(chip, ops->oobbuf, ops);
+ status = chip->ecc.write_oob(mtd, chip, page & chip->pagemask);
+ memset(chip->oob_poi, 0xff, mtd->oobsize);
+
+ if (status)
+ return status;
+
+ ops->oobretlen = ops->ooblen;
+
+ return 0;
+}
+
+/**
+ * nand_write_oob - [MTD Interface] NAND write data and/or out-of-band
+ * @mtd: MTD device structure
+ * @to: offset to write to
+ * @ops: oob operation description structure
+ */
+static int nand_write_oob(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
+{
+ struct nand_chip *chip = mtd->priv;
+ int ret = -ENOSYS;
+
+ ops->retlen = 0;
+
+ /* Do not allow writes past end of device */
+ if (ops->datbuf && (to + ops->len) > mtd->size) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
+ "Attempt read beyond end of device\n");
+ return -EINVAL;
+ }
+
+ nand_get_device(chip, mtd, FL_WRITING);
+
+ switch(ops->mode) {
+ case MTD_OOB_PLACE:
+ case MTD_OOB_AUTO:
+ case MTD_OOB_RAW:
+ break;
+
+ default:
+ goto out;
+ }
+
+ if (!ops->datbuf)
+ ret = nand_do_write_oob(mtd, to, ops);
+ else
+ ret = nand_do_write_ops(mtd, to, ops);
+
+ out:
+ nand_release_device(mtd);
+ return ret;
+}
+
+/**
+ * single_erease_cmd - [GENERIC] NAND standard block erase command function
+ * @mtd: MTD device structure
+ * @page: the page address of the block which will be erased
+ *
+ * Standard erase command for NAND chips
+ */
+static void single_erase_cmd(struct mtd_info *mtd, int page)
+{
+ struct nand_chip *chip = mtd->priv;
+ /* Send commands to erase a block */
+ chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page);
+ chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1);
+}
+
+/**
+ * multi_erease_cmd - [GENERIC] AND specific block erase command function
+ * @mtd: MTD device structure
+ * @page: the page address of the block which will be erased
+ *
+ * AND multi block erase command function
+ * Erase 4 consecutive blocks
+ */
+static void multi_erase_cmd(struct mtd_info *mtd, int page)
+{
+ struct nand_chip *chip = mtd->priv;
+ /* Send commands to erase a block */
+ chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++);
+ chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++);
+ chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++);
+ chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page);
+ chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1);
+}
+
+/**
+ * nand_erase - [MTD Interface] erase block(s)
+ * @mtd: MTD device structure
+ * @instr: erase instruction
+ *
+ * Erase one ore more blocks
+ */
+static int nand_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+ return nand_erase_nand(mtd, instr, 0);
+}
+
+#define BBT_PAGE_MASK 0xffffff3f
+/**
+ * nand_erase_nand - [Internal] erase block(s)
+ * @mtd: MTD device structure
+ * @instr: erase instruction
+ * @allowbbt: allow erasing the bbt area
+ *
+ * Erase one ore more blocks
+ */
+int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
+ int allowbbt)
+{
+ int page, len, status, pages_per_block, ret, chipnr;
+ struct nand_chip *chip = mtd->priv;
+ int rewrite_bbt[NAND_MAX_CHIPS]={0};
+ unsigned int bbt_masked_page = 0xffffffff;
+
+ MTD_DEBUG(MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%08x, len = %i\n",
+ (unsigned int)instr->addr, (unsigned int)instr->len);
+
+ /* Start address must align on block boundary */
+ if (instr->addr & ((1 << chip->phys_erase_shift) - 1)) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Unaligned address\n");
+ return -EINVAL;
+ }
+
+ /* Length must align on block boundary */
+ if (instr->len & ((1 << chip->phys_erase_shift) - 1)) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
+ "Length not block aligned\n");
+ return -EINVAL;
+ }
+
+ /* Do not allow erase past end of device */
+ if ((instr->len + instr->addr) > mtd->size) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
+ "Erase past end of device\n");
+ return -EINVAL;
+ }
+
+ instr->fail_addr = 0xffffffff;
+
+ /* Grab the lock and see if the device is available */
+ nand_get_device(chip, mtd, FL_ERASING);
+
+ /* Shift to get first page */
+ page = (int)(instr->addr >> chip->page_shift);
+ chipnr = (int)(instr->addr >> chip->chip_shift);
+
+ /* Calculate pages in each block */
+ pages_per_block = 1 << (chip->phys_erase_shift - chip->page_shift);
+
+ /* Select the NAND device */
+ chip->select_chip(mtd, chipnr);
+
+ /* Check, if it is write protected */
+ if (nand_check_wp(mtd)) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
+ "Device is write protected!!!\n");
+ instr->state = MTD_ERASE_FAILED;
+ goto erase_exit;
+ }
+
+ /*
+ * If BBT requires refresh, set the BBT page mask to see if the BBT
+ * should be rewritten. Otherwise the mask is set to 0xffffffff which
+ * can not be matched. This is also done when the bbt is actually
+ * erased to avoid recusrsive updates
+ */
+ if (chip->options & BBT_AUTO_REFRESH && !allowbbt)
+ bbt_masked_page = chip->bbt_td->pages[chipnr] & BBT_PAGE_MASK;
+
+ /* Loop through the pages */
+ len = instr->len;
+
+ instr->state = MTD_ERASING;
+
+ while (len) {
+ /*
+ * heck if we have a bad block, we do not erase bad blocks !
+ */
+ if (nand_block_checkbad(mtd, ((loff_t) page) <<
+ chip->page_shift, 0, allowbbt)) {
+ printk(KERN_WARNING "nand_erase: attempt to erase a "
+ "bad block at page 0x%08x\n", page);
+ instr->state = MTD_ERASE_FAILED;
+ goto erase_exit;
+ }
+
+ /*
+ * Invalidate the page cache, if we erase the block which
+ * contains the current cached page
+ */
+ if (page <= chip->pagebuf && chip->pagebuf <
+ (page + pages_per_block))
+ chip->pagebuf = -1;
+
+ chip->erase_cmd(mtd, page & chip->pagemask);
+
+ status = chip->waitfunc(mtd, chip);
+
+ /*
+ * See if operation failed and additional status checks are
+ * available
+ */
+ if ((status & NAND_STATUS_FAIL) && (chip->errstat))
+ status = chip->errstat(mtd, chip, FL_ERASING,
+ status, page);
+
+ /* See if block erase succeeded */
+ if (status & NAND_STATUS_FAIL) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
+ "Failed erase, page 0x%08x\n", page);
+ instr->state = MTD_ERASE_FAILED;
+ instr->fail_addr = (page << chip->page_shift);
+ goto erase_exit;
+ }
+
+ /*
+ * If BBT requires refresh, set the BBT rewrite flag to the
+ * page being erased
+ */
+ if (bbt_masked_page != 0xffffffff &&
+ (page & BBT_PAGE_MASK) == bbt_masked_page)
+ rewrite_bbt[chipnr] = (page << chip->page_shift);
+
+ /* Increment page address and decrement length */
+ len -= (1 << chip->phys_erase_shift);
+ page += pages_per_block;
+
+ /* Check, if we cross a chip boundary */
+ if (len && !(page & chip->pagemask)) {
+ chipnr++;
+ chip->select_chip(mtd, -1);
+ chip->select_chip(mtd, chipnr);
+
+ /*
+ * If BBT requires refresh and BBT-PERCHIP, set the BBT
+ * page mask to see if this BBT should be rewritten
+ */
+ if (bbt_masked_page != 0xffffffff &&
+ (chip->bbt_td->options & NAND_BBT_PERCHIP))
+ bbt_masked_page = chip->bbt_td->pages[chipnr] &
+ BBT_PAGE_MASK;
+ }
+ }
+ instr->state = MTD_ERASE_DONE;
+
+ erase_exit:
+
+ ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO;
+
+ /* Deselect and wake up anyone waiting on the device */
+ nand_release_device(mtd);
+
+ /* Do call back function */
+ if (!ret)
+ mtd_erase_callback(instr);
+
+ /*
+ * If BBT requires refresh and erase was successful, rewrite any
+ * selected bad block tables
+ */
+ if (bbt_masked_page == 0xffffffff || ret)
+ return ret;
+
+ for (chipnr = 0; chipnr < chip->numchips; chipnr++) {
+ if (!rewrite_bbt[chipnr])
+ continue;
+ /* update the BBT for chip */
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_erase_nand: nand_update_bbt "
+ "(%d:0x%0x 0x%0x)\n", chipnr, rewrite_bbt[chipnr],
+ chip->bbt_td->pages[chipnr]);
+ nand_update_bbt(mtd, rewrite_bbt[chipnr]);
+ }
+
+ /* Return more or less happy */
+ return ret;
+}
+
+/**
+ * nand_sync - [MTD Interface] sync
+ * @mtd: MTD device structure
+ *
+ * Sync is actually a wait for chip ready function
+ */
+static void nand_sync(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+
+ MTD_DEBUG(MTD_DEBUG_LEVEL3, "nand_sync: called\n");
+
+ /* Grab the lock and see if the device is available */
+ nand_get_device(chip, mtd, FL_SYNCING);
+ /* Release it and go back */
+ nand_release_device(mtd);
+}
+
+/**
+ * nand_block_isbad - [MTD Interface] Check if block at offset is bad
+ * @mtd: MTD device structure
+ * @offs: offset relative to mtd start
+ */
+static int nand_block_isbad(struct mtd_info *mtd, loff_t offs)
+{
+ /* Check for invalid offset */
+ if (offs > mtd->size)
+ return -EINVAL;
+
+ return nand_block_checkbad(mtd, offs, 1, 0);
+}
+
+/**
+ * nand_block_markbad - [MTD Interface] Mark block at the given offset as bad
+ * @mtd: MTD device structure
+ * @ofs: offset relative to mtd start
+ */
+static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
+{
+ struct nand_chip *chip = mtd->priv;
+ int ret;
+
+ if ((ret = nand_block_isbad(mtd, ofs))) {
+ /* If it was bad already, return success and do nothing. */
+ if (ret > 0)
+ return 0;
+ return ret;
+ }
+
+ return chip->block_markbad(mtd, ofs);
+}
+
+/**
+ * nand_suspend - [MTD Interface] Suspend the NAND flash
+ * @mtd: MTD device structure
+ */
+static int nand_suspend(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+
+ return nand_get_device(chip, mtd, FL_PM_SUSPENDED);
+}
+
+/**
+ * nand_resume - [MTD Interface] Resume the NAND flash
+ * @mtd: MTD device structure
+ */
+static void nand_resume(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+
+ if (chip->state == FL_PM_SUSPENDED)
+ nand_release_device(mtd);
+ else
+ printk(KERN_ERR "nand_resume() called for a chip which is not "
+ "in suspended state\n");
+}
+
+/*
+ * Set default functions
+ */
+static void nand_set_defaults(struct nand_chip *chip, int busw)
+{
+ /* check for proper chip_delay setup, set 20us if not */
+ if (!chip->chip_delay)
+ chip->chip_delay = 20;
+
+ /* check, if a user supplied command function given */
+ if (chip->cmdfunc == NULL)
+ chip->cmdfunc = nand_command;
+
+ /* check, if a user supplied wait function given */
+ if (chip->waitfunc == NULL)
+ chip->waitfunc = nand_wait;
+
+ if (!chip->select_chip)
+ chip->select_chip = nand_select_chip;
+ if (!chip->read_byte)
+ chip->read_byte = busw ? nand_read_byte16 : nand_read_byte;
+ if (!chip->read_word)
+ chip->read_word = nand_read_word;
+ if (!chip->block_bad)
+ chip->block_bad = nand_block_bad;
+ if (!chip->block_markbad)
+ chip->block_markbad = nand_default_block_markbad;
+ if (!chip->write_buf)
+ chip->write_buf = busw ? nand_write_buf16 : nand_write_buf;
+ if (!chip->read_buf)
+ chip->read_buf = busw ? nand_read_buf16 : nand_read_buf;
+ if (!chip->verify_buf)
+ chip->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf;
+ if (!chip->scan_bbt)
+ chip->scan_bbt = nand_default_bbt;
+
+ if (!chip->controller) {
+ chip->controller = &chip->hwcontrol;
+ }
+
+}
+
+/*
+ * Get the flash and manufacturer id and lookup if the type is supported
+ */
+static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
+ struct nand_chip *chip,
+ int busw, int *maf_id)
+{
+ struct nand_flash_dev *type = NULL;
+ int i, dev_id, maf_idx;
+ int tmp_id, tmp_manf;
+
+ /* Select the device */
+ chip->select_chip(mtd, 0);
+
+ /* Send the command for reading device ID */
+ chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
+
+ /* Read manufacturer and device IDs */
+ *maf_id = chip->read_byte(mtd);
+ dev_id = chip->read_byte(mtd);
+
+ /* Try again to make sure, as some systems the bus-hold or other
+ * interface concerns can cause random data which looks like a
+ * possibly credible NAND flash to appear. If the two results do
+ * not match, ignore the device completely.
+ */
+
+ chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
+
+ /* Read manufacturer and device IDs */
+
+ tmp_manf = chip->read_byte(mtd);
+ tmp_id = chip->read_byte(mtd);
+
+ if (tmp_manf != *maf_id || tmp_id != dev_id) {
+ printk(KERN_INFO "%s: second ID read did not match "
+ "%02x,%02x against %02x,%02x\n", __func__,
+ *maf_id, dev_id, tmp_manf, tmp_id);
+ return ERR_PTR(-ENODEV);
+ }
+
+ /* Lookup the flash id */
+ for (i = 0; nand_flash_ids[i].name != NULL; i++) {
+ if (dev_id == nand_flash_ids[i].id) {
+ type = &nand_flash_ids[i];
+ break;
+ }
+ }
+
+ if (!type)
+ return ERR_PTR(-ENODEV);
+
+ if (!mtd->name)
+ mtd->name = type->name;
+
+ chip->chipsize = type->chipsize << 20;
+
+ /* Newer devices have all the information in additional id bytes */
+ if (!type->pagesize) {
+ int extid;
+ /* The 3rd id byte holds MLC / multichip data */
+ chip->cellinfo = chip->read_byte(mtd);
+ /* The 4th id byte is the important one */
+ extid = chip->read_byte(mtd);
+ /* Calc pagesize */
+ mtd->writesize = 1024 << (extid & 0x3);
+ extid >>= 2;
+ /* Calc oobsize */
+ mtd->oobsize = (8 << (extid & 0x01)) * (mtd->writesize >> 9);
+ extid >>= 2;
+ /* Calc blocksize. Blocksize is multiples of 64KiB */
+ mtd->erasesize = (64 * 1024) << (extid & 0x03);
+ extid >>= 2;
+ /* Get buswidth information */
+ busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0;
+
+ } else {
+ /*
+ * Old devices have chip data hardcoded in the device id table
+ */
+ mtd->erasesize = type->erasesize;
+ mtd->writesize = type->pagesize;
+ mtd->oobsize = mtd->writesize / 32;
+ busw = type->options & NAND_BUSWIDTH_16;
+ }
+
+ /* Try to identify manufacturer */
+ for (maf_idx = 0; nand_manuf_ids[maf_idx].id != 0x0; maf_idx++) {
+ if (nand_manuf_ids[maf_idx].id == *maf_id)
+ break;
+ }
+
+ /*
+ * Check, if buswidth is correct. Hardware drivers should set
+ * chip correct !
+ */
+ if (busw != (chip->options & NAND_BUSWIDTH_16)) {
+ printk(KERN_INFO "NAND device: Manufacturer ID:"
+ " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id,
+ dev_id, nand_manuf_ids[maf_idx].name, mtd->name);
+ printk(KERN_WARNING "NAND bus width %d instead %d bit\n",
+ (chip->options & NAND_BUSWIDTH_16) ? 16 : 8,
+ busw ? 16 : 8);
+ return ERR_PTR(-EINVAL);
+ }
+
+ /* Calculate the address shift from the page size */
+ chip->page_shift = ffs(mtd->writesize) - 1;
+ /* Convert chipsize to number of pages per chip -1. */
+ chip->pagemask = (chip->chipsize >> chip->page_shift) - 1;
+
+ chip->bbt_erase_shift = chip->phys_erase_shift =
+ ffs(mtd->erasesize) - 1;
+ chip->chip_shift = ffs(chip->chipsize) - 1;
+
+ /* Set the bad block position */
+ chip->badblockpos = mtd->writesize > 512 ?
+ NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS;
+
+ /* Get chip options, preserve non chip based options */
+ chip->options &= ~NAND_CHIPOPTIONS_MSK;
+ chip->options |= type->options & NAND_CHIPOPTIONS_MSK;
+
+ /*
+ * Set chip as a default. Board drivers can override it, if necessary
+ */
+ chip->options |= NAND_NO_AUTOINCR;
+
+ /* Check if chip is a not a samsung device. Do not clear the
+ * options for chips which are not having an extended id.
+ */
+ if (*maf_id != NAND_MFR_SAMSUNG && !type->pagesize)
+ chip->options &= ~NAND_SAMSUNG_LP_OPTIONS;
+
+ /* Check for AND chips with 4 page planes */
+ if (chip->options & NAND_4PAGE_ARRAY)
+ chip->erase_cmd = multi_erase_cmd;
+ else
+ chip->erase_cmd = single_erase_cmd;
+
+ /* Do not replace user supplied command function ! */
+ if (mtd->writesize > 512 && chip->cmdfunc == nand_command)
+ chip->cmdfunc = nand_command_lp;
+
+ printk(KERN_INFO "NAND device: Manufacturer ID:"
+ " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, dev_id,
+ nand_manuf_ids[maf_idx].name, type->name);
+
+ return type;
+}
+
+/**
+ * nand_scan_ident - [NAND Interface] Scan for the NAND device
+ * @mtd: MTD device structure
+ * @maxchips: Number of chips to scan for
+ *
+ * This is the first phase of the normal nand_scan() function. It
+ * reads the flash ID and sets up MTD fields accordingly.
+ *
+ * The mtd->owner field must be set to the module of the caller.
+ */
+int nand_scan_ident(struct mtd_info *mtd, int maxchips)
+{
+ int i, busw, nand_maf_id;
+ struct nand_chip *chip = mtd->priv;
+ struct nand_flash_dev *type;
+
+ /* Get buswidth to select the correct functions */
+ busw = chip->options & NAND_BUSWIDTH_16;
+ /* Set the default functions */
+ nand_set_defaults(chip, busw);
+
+ /* Read the flash type */
+ type = nand_get_flash_type(mtd, chip, busw, &nand_maf_id);
+
+ if (IS_ERR(type)) {
+ printk(KERN_WARNING "No NAND device found!!!\n");
+ chip->select_chip(mtd, -1);
+ return PTR_ERR(type);
+ }
+
+ /* Check for a chip array */
+ for (i = 1; i < maxchips; i++) {
+ chip->select_chip(mtd, i);
+ /* Send the command for reading device ID */
+ chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
+ /* Read manufacturer and device IDs */
+ if (nand_maf_id != chip->read_byte(mtd) ||
+ type->id != chip->read_byte(mtd))
+ break;
+ }
+ if (i > 1)
+ printk(KERN_INFO "%d NAND chips detected\n", i);
+
+ /* Store the number of chips and calc total size for mtd */
+ chip->numchips = i;
+ mtd->size = i * chip->chipsize;
+
+ return 0;
+}
+
+
+/**
+ * nand_scan_tail - [NAND Interface] Scan for the NAND device
+ * @mtd: MTD device structure
+ * @maxchips: Number of chips to scan for
+ *
+ * This is the second phase of the normal nand_scan() function. It
+ * fills out all the uninitialized function pointers with the defaults
+ * and scans for a bad block table if appropriate.
+ */
+int nand_scan_tail(struct mtd_info *mtd)
+{
+ int i;
+ struct nand_chip *chip = mtd->priv;
+
+ if (!(chip->options & NAND_OWN_BUFFERS))
+ chip->buffers = kmalloc(sizeof(*chip->buffers), GFP_KERNEL);
+ if (!chip->buffers)
+ return -ENOMEM;
+
+ /* Set the internal oob buffer location, just after the page data */
+ chip->oob_poi = chip->buffers->databuf + mtd->writesize;
+
+ /*
+ * If no default placement scheme is given, select an appropriate one
+ */
+ if (!chip->ecc.layout) {
+ switch (mtd->oobsize) {
+ case 8:
+ chip->ecc.layout = &nand_oob_8;
+ break;
+ case 16:
+ chip->ecc.layout = &nand_oob_16;
+ break;
+ case 64:
+ chip->ecc.layout = &nand_oob_64;
+ break;
+ default:
+ printk(KERN_WARNING "No oob scheme defined for "
+ "oobsize %d\n", mtd->oobsize);
+ BUG();
+ }
+ }
+
+ if (!chip->write_page)
+ chip->write_page = nand_write_page;
+
+ /*
+ * check ECC mode, default to software if 3byte/512byte hardware ECC is
+ * selected and we have 256 byte pagesize fallback to software ECC
+ */
+ if (!chip->ecc.read_page_raw)
+ chip->ecc.read_page_raw = nand_read_page_raw;
+ if (!chip->ecc.write_page_raw)
+ chip->ecc.write_page_raw = nand_write_page_raw;
+
+ switch (chip->ecc.mode) {
+ case NAND_ECC_HW:
+ /* Use standard hwecc read page function ? */
+ if (!chip->ecc.read_page)
+ chip->ecc.read_page = nand_read_page_hwecc;
+ if (!chip->ecc.write_page)
+ chip->ecc.write_page = nand_write_page_hwecc;
+ if (!chip->ecc.read_oob)
+ chip->ecc.read_oob = nand_read_oob_std;
+ if (!chip->ecc.write_oob)
+ chip->ecc.write_oob = nand_write_oob_std;
+
+ case NAND_ECC_HW_SYNDROME:
+ if ((!chip->ecc.calculate || !chip->ecc.correct ||
+ !chip->ecc.hwctl) &&
+ (!chip->ecc.read_page ||
+ chip->ecc.read_page == nand_read_page_hwecc ||
+ !chip->ecc.write_page ||
+ chip->ecc.write_page == nand_write_page_hwecc)) {
+ printk(KERN_WARNING "No ECC functions supplied, "
+ "Hardware ECC not possible\n");
+ BUG();
+ }
+ /* Use standard syndrome read/write page function ? */
+ if (!chip->ecc.read_page)
+ chip->ecc.read_page = nand_read_page_syndrome;
+ if (!chip->ecc.write_page)
+ chip->ecc.write_page = nand_write_page_syndrome;
+ if (!chip->ecc.read_oob)
+ chip->ecc.read_oob = nand_read_oob_syndrome;
+ if (!chip->ecc.write_oob)
+ chip->ecc.write_oob = nand_write_oob_syndrome;
+
+ if (mtd->writesize >= chip->ecc.size)
+ break;
+ printk(KERN_WARNING "%d byte HW ECC not possible on "
+ "%d byte page size, fallback to SW ECC\n",
+ chip->ecc.size, mtd->writesize);
+ chip->ecc.mode = NAND_ECC_SOFT;
+
+ case NAND_ECC_SOFT:
+ chip->ecc.calculate = nand_calculate_ecc;
+ chip->ecc.correct = nand_correct_data;
+ chip->ecc.read_page = nand_read_page_swecc;
+ chip->ecc.write_page = nand_write_page_swecc;
+ chip->ecc.read_oob = nand_read_oob_std;
+ chip->ecc.write_oob = nand_write_oob_std;
+ chip->ecc.size = 256;
+ chip->ecc.bytes = 3;
+ break;
+
+ case NAND_ECC_NONE:
+ printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. "
+ "This is not recommended !!\n");
+ chip->ecc.read_page = nand_read_page_raw;
+ chip->ecc.write_page = nand_write_page_raw;
+ chip->ecc.read_oob = nand_read_oob_std;
+ chip->ecc.write_oob = nand_write_oob_std;
+ chip->ecc.size = mtd->writesize;
+ chip->ecc.bytes = 0;
+ break;
+
+ default:
+ printk(KERN_WARNING "Invalid NAND_ECC_MODE %d\n",
+ chip->ecc.mode);
+ BUG();
+ }
+
+ /*
+ * The number of bytes available for a client to place data into
+ * the out of band area
+ */
+ chip->ecc.layout->oobavail = 0;
+ for (i = 0; chip->ecc.layout->oobfree[i].length; i++)
+ chip->ecc.layout->oobavail +=
+ chip->ecc.layout->oobfree[i].length;
+ mtd->oobavail = chip->ecc.layout->oobavail;
+
+ /*
+ * Set the number of read / write steps for one page depending on ECC
+ * mode
+ */
+ chip->ecc.steps = mtd->writesize / chip->ecc.size;
+ if(chip->ecc.steps * chip->ecc.size != mtd->writesize) {
+ printk(KERN_WARNING "Invalid ecc parameters\n");
+ BUG();
+ }
+ chip->ecc.total = chip->ecc.steps * chip->ecc.bytes;
+
+ /*
+ * Allow subpage writes up to ecc.steps. Not possible for MLC
+ * FLASH.
+ */
+ if (!(chip->options & NAND_NO_SUBPAGE_WRITE) &&
+ !(chip->cellinfo & NAND_CI_CELLTYPE_MSK)) {
+ switch(chip->ecc.steps) {
+ case 2:
+ mtd->subpage_sft = 1;
+ break;
+ case 4:
+ case 8:
+ mtd->subpage_sft = 2;
+ break;
+ }
+ }
+ chip->subpagesize = mtd->writesize >> mtd->subpage_sft;
+
+ /* Initialize state */
+ chip->state = FL_READY;
+
+ /* De-select the device */
+ chip->select_chip(mtd, -1);
+
+ /* Invalidate the pagebuffer reference */
+ chip->pagebuf = -1;
+
+ /* Fill in remaining MTD driver data */
+ mtd->type = MTD_NANDFLASH;
+ mtd->flags = MTD_CAP_NANDFLASH;
+ mtd->erase = nand_erase;
+ mtd->read = nand_read;
+ mtd->write = nand_write;
+ mtd->read_oob = nand_read_oob;
+ mtd->write_oob = nand_write_oob;
+ mtd->sync = nand_sync;
+ mtd->lock = NULL;
+ mtd->unlock = NULL;
+ mtd->suspend = nand_suspend;
+ mtd->resume = nand_resume;
+ mtd->block_isbad = nand_block_isbad;
+ mtd->block_markbad = nand_block_markbad;
+
+ /* propagate ecc.layout to mtd_info */
+ mtd->ecclayout = chip->ecc.layout;
+
+ /* Check, if we should skip the bad block table scan */
+ if (chip->options & NAND_SKIP_BBTSCAN)
+ return 0;
+
+ /* Build bad block table */
+ return chip->scan_bbt(mtd);
+}
+
+/**
+ * nand_scan - [NAND Interface] Scan for the NAND device
+ * @mtd: MTD device structure
+ * @maxchips: Number of chips to scan for
+ *
+ * This fills out all the uninitialized function pointers
+ * with the defaults.
+ * The flash ID is read and the mtd/chip structures are
+ * filled with the appropriate values.
+ * The mtd->owner field must be set to the module of the caller
+ *
+ */
+int nand_scan(struct mtd_info *mtd, int maxchips)
+{
+ int ret;
+
+ ret = nand_scan_ident(mtd, maxchips);
+ if (!ret)
+ ret = nand_scan_tail(mtd);
+ return ret;
+}
+
+/**
+ * nand_release - [NAND Interface] Free resources held by the NAND device
+ * @mtd: MTD device structure
+*/
+void nand_release(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+
+ /* Deregister the device */
+ del_mtd_device(mtd);
+
+ /* Free bad block table memory */
+ kfree(chip->bbt);
+ if (!(chip->options & NAND_OWN_BUFFERS))
+ kfree(chip->buffers);
+}
+
+EXPORT_SYMBOL(nand_scan);
+EXPORT_SYMBOL(nand_scan_ident);
+EXPORT_SYMBOL(nand_scan_tail);
+EXPORT_SYMBOL(nand_release);
+
+#endif /* DOXYGEN_SHOULD_SKIP_THIS */
diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
new file mode 100644
index 0000000..4a6bf39
--- /dev/null
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -0,0 +1,1224 @@
+/*
+ * drivers/mtd/nand_bbt.c
+ *
+ * Overview:
+ * Bad block table support for the NAND driver
+ *
+ * Copyright (C) 2004 Thomas Gleixner (tglx@linutronix.de)
+ *
+ * $Id: nand_bbt.c,v 1.36 2005/11/07 11:14:30 gleixner Exp $
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Description:
+ *
+ * When nand_scan_bbt is called, then it tries to find the bad block table
+ * depending on the options in the bbt descriptor(s). If a bbt is found
+ * then the contents are read and the memory based bbt is created. If a
+ * mirrored bbt is selected then the mirror is searched too and the
+ * versions are compared. If the mirror has a greater version number
+ * than the mirror bbt is used to build the memory based bbt.
+ * If the tables are not versioned, then we "or" the bad block information.
+ * If one of the bbt's is out of date or does not exist it is (re)created.
+ * If no bbt exists at all then the device is scanned for factory marked
+ * good / bad blocks and the bad block tables are created.
+ *
+ * For manufacturer created bbts like the one found on M-SYS DOC devices
+ * the bbt is searched and read but never created
+ *
+ * The autogenerated bad block table is located in the last good blocks
+ * of the device. The table is mirrored, so it can be updated eventually.
+ * The table is marked in the oob area with an ident pattern and a version
+ * number which indicates which of both tables is more up to date.
+ *
+ * The table uses 2 bits per block
+ * 11b: block is good
+ * 00b: block is factory marked bad
+ * 01b, 10b: block is marked bad due to wear
+ *
+ * The memory bad block table uses the following scheme:
+ * 00b: block is good
+ * 01b: block is marked bad due to wear
+ * 10b: block is reserved (to protect the bbt area)
+ * 11b: block is factory marked bad
+ *
+ * Multichip devices like DOC store the bad block info per floor.
+ *
+ * Following assumptions are made:
+ * - bbts start at a page boundary, if autolocated on a block boundary
+ * - the space necessary for a bbt in FLASH does not exceed a block boundary
+ *
+ */
+#include <common.h>
+#include <linux/types.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/nand_ecc.h>
+#include <linux/bitops.h>
+#include <clock.h>
+#include <errno.h>
+#include <malloc.h>
+
+#ifndef DOXYGEN_SHOULD_SKIP_THIS
+
+/**
+ * check_pattern - [GENERIC] check if a pattern is in the buffer
+ * @buf: the buffer to search
+ * @len: the length of buffer to search
+ * @paglen: the pagelength
+ * @td: search pattern descriptor
+ *
+ * Check for a pattern at the given place. Used to search bad block
+ * tables and good / bad block identifiers.
+ * If the SCAN_EMPTY option is set then check, if all bytes except the
+ * pattern area contain 0xff
+ *
+*/
+static int check_pattern(uint8_t *buf, int len, int paglen, struct nand_bbt_descr *td)
+{
+ int i, end = 0;
+ uint8_t *p = buf;
+
+ end = paglen + td->offs;
+ if (td->options & NAND_BBT_SCANEMPTY) {
+ for (i = 0; i < end; i++) {
+ if (p[i] != 0xff)
+ return -1;
+ }
+ }
+ p += end;
+
+ /* Compare the pattern */
+ for (i = 0; i < td->len; i++) {
+ if (p[i] != td->pattern[i])
+ return -1;
+ }
+
+ if (td->options & NAND_BBT_SCANEMPTY) {
+ p += td->len;
+ end += td->len;
+ for (i = end; i < len; i++) {
+ if (*p++ != 0xff)
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/**
+ * check_short_pattern - [GENERIC] check if a pattern is in the buffer
+ * @buf: the buffer to search
+ * @td: search pattern descriptor
+ *
+ * Check for a pattern at the given place. Used to search bad block
+ * tables and good / bad block identifiers. Same as check_pattern, but
+ * no optional empty check
+ *
+*/
+static int check_short_pattern(uint8_t *buf, struct nand_bbt_descr *td)
+{
+ int i;
+ uint8_t *p = buf;
+
+ /* Compare the pattern */
+ for (i = 0; i < td->len; i++) {
+ if (p[td->offs + i] != td->pattern[i])
+ return -1;
+ }
+ return 0;
+}
+
+/**
+ * read_bbt - [GENERIC] Read the bad block table starting from page
+ * @mtd: MTD device structure
+ * @buf: temporary buffer
+ * @page: the starting page
+ * @num: the number of bbt descriptors to read
+ * @bits: number of bits per block
+ * @offs: offset in the memory table
+ * @reserved_block_code: Pattern to identify reserved blocks
+ *
+ * Read the bad block table starting from page.
+ *
+ */
+static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
+ int bits, int offs, int reserved_block_code)
+{
+ int res, i, j, act = 0;
+ struct nand_chip *this = mtd->priv;
+ size_t retlen, len, totlen;
+ loff_t from;
+ uint8_t msk = (uint8_t) ((1 << bits) - 1);
+
+ totlen = (num * bits) >> 3;
+ from = ((loff_t) page) << this->page_shift;
+
+ while (totlen) {
+ len = min(totlen, (size_t) (1 << this->bbt_erase_shift));
+ res = mtd->read(mtd, from, len, &retlen, buf);
+ if (res < 0) {
+ if (retlen != len) {
+ printk(KERN_INFO "nand_bbt: Error reading bad block table\n");
+ return res;
+ }
+ printk(KERN_WARNING "nand_bbt: ECC error while reading bad block table\n");
+ }
+
+ /* Analyse data */
+ for (i = 0; i < len; i++) {
+ uint8_t dat = buf[i];
+ for (j = 0; j < 8; j += bits, act += 2) {
+ uint8_t tmp = (dat >> j) & msk;
+ if (tmp == msk)
+ continue;
+ if (reserved_block_code && (tmp == reserved_block_code)) {
+ printk(KERN_DEBUG "nand_read_bbt: Reserved block at 0x%08x\n",
+ ((offs << 2) + (act >> 1)) << this->bbt_erase_shift);
+ this->bbt[offs + (act >> 3)] |= 0x2 << (act & 0x06);
+ mtd->ecc_stats.bbtblocks++;
+ continue;
+ }
+ /* Leave it for now, if its matured we can move this
+ * message to MTD_DEBUG_LEVEL0 */
+ printk(KERN_DEBUG "nand_read_bbt: Bad block at 0x%08x\n",
+ ((offs << 2) + (act >> 1)) << this->bbt_erase_shift);
+ /* Factory marked bad or worn out ? */
+ if (tmp == 0)
+ this->bbt[offs + (act >> 3)] |= 0x3 << (act & 0x06);
+ else
+ this->bbt[offs + (act >> 3)] |= 0x1 << (act & 0x06);
+ mtd->ecc_stats.badblocks++;
+ }
+ }
+ totlen -= len;
+ from += len;
+ }
+ return 0;
+}
+
+/**
+ * read_abs_bbt - [GENERIC] Read the bad block table starting at a given page
+ * @mtd: MTD device structure
+ * @buf: temporary buffer
+ * @td: descriptor for the bad block table
+ * @chip: read the table for a specific chip, -1 read all chips.
+ * Applies only if NAND_BBT_PERCHIP option is set
+ *
+ * Read the bad block table for all chips starting at a given page
+ * We assume that the bbt bits are in consecutive order.
+*/
+static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip)
+{
+ struct nand_chip *this = mtd->priv;
+ int res = 0, i;
+ int bits;
+
+ bits = td->options & NAND_BBT_NRBITS_MSK;
+ if (td->options & NAND_BBT_PERCHIP) {
+ int offs = 0;
+ for (i = 0; i < this->numchips; i++) {
+ if (chip == -1 || chip == i)
+ res = read_bbt (mtd, buf, td->pages[i], this->chipsize >> this->bbt_erase_shift, bits, offs, td->reserved_block_code);
+ if (res)
+ return res;
+ offs += this->chipsize >> (this->bbt_erase_shift + 2);
+ }
+ } else {
+ res = read_bbt (mtd, buf, td->pages[0], mtd->size >> this->bbt_erase_shift, bits, 0, td->reserved_block_code);
+ if (res)
+ return res;
+ }
+ return 0;
+}
+
+/*
+ * Scan read raw data from flash
+ */
+static int scan_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
+ size_t len)
+{
+ struct mtd_oob_ops ops;
+
+ ops.mode = MTD_OOB_RAW;
+ ops.ooboffs = 0;
+ ops.ooblen = mtd->oobsize;
+ ops.oobbuf = buf;
+ ops.datbuf = buf;
+ ops.len = len;
+
+ return mtd->read_oob(mtd, offs, &ops);
+}
+
+/*
+ * Scan write data with oob to flash
+ */
+static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len,
+ uint8_t *buf, uint8_t *oob)
+{
+ struct mtd_oob_ops ops;
+
+ ops.mode = MTD_OOB_PLACE;
+ ops.ooboffs = 0;
+ ops.ooblen = mtd->oobsize;
+ ops.datbuf = buf;
+ ops.oobbuf = oob;
+ ops.len = len;
+
+ return mtd->write_oob(mtd, offs, &ops);
+}
+
+/**
+ * read_abs_bbts - [GENERIC] Read the bad block table(s) for all chips starting at a given page
+ * @mtd: MTD device structure
+ * @buf: temporary buffer
+ * @td: descriptor for the bad block table
+ * @md: descriptor for the bad block table mirror
+ *
+ * Read the bad block table(s) for all chips starting at a given page
+ * We assume that the bbt bits are in consecutive order.
+ *
+*/
+static int read_abs_bbts(struct mtd_info *mtd, uint8_t *buf,
+ struct nand_bbt_descr *td, struct nand_bbt_descr *md)
+{
+ struct nand_chip *this = mtd->priv;
+
+ /* Read the primary version, if available */
+ if (td->options & NAND_BBT_VERSION) {
+ scan_read_raw(mtd, buf, td->pages[0] << this->page_shift,
+ mtd->writesize);
+ td->version[0] = buf[mtd->writesize + td->veroffs];
+ printk(KERN_DEBUG "Bad block table at page %d, version 0x%02X\n",
+ td->pages[0], td->version[0]);
+ }
+
+ /* Read the mirror version, if available */
+ if (md && (md->options & NAND_BBT_VERSION)) {
+ scan_read_raw(mtd, buf, md->pages[0] << this->page_shift,
+ mtd->writesize);
+ md->version[0] = buf[mtd->writesize + md->veroffs];
+ printk(KERN_DEBUG "Bad block table at page %d, version 0x%02X\n",
+ md->pages[0], md->version[0]);
+ }
+ return 1;
+}
+
+/*
+ * Scan a given block full
+ */
+static int scan_block_full(struct mtd_info *mtd, struct nand_bbt_descr *bd,
+ loff_t offs, uint8_t *buf, size_t readlen,
+ int scanlen, int len)
+{
+ int ret, j;
+
+ ret = scan_read_raw(mtd, buf, offs, readlen);
+ if (ret)
+ return ret;
+
+ for (j = 0; j < len; j++, buf += scanlen) {
+ if (check_pattern(buf, scanlen, mtd->writesize, bd))
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Scan a given block partially
+ */
+static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd,
+ loff_t offs, uint8_t *buf, int len)
+{
+ struct mtd_oob_ops ops;
+ int j, ret;
+
+ ops.ooblen = mtd->oobsize;
+ ops.oobbuf = buf;
+ ops.ooboffs = 0;
+ ops.datbuf = NULL;
+ ops.mode = MTD_OOB_PLACE;
+
+ for (j = 0; j < len; j++) {
+ /*
+ * Read the full oob until read_oob is fixed to
+ * handle single byte reads for 16 bit
+ * buswidth
+ */
+ ret = mtd->read_oob(mtd, offs, &ops);
+ if (ret)
+ return ret;
+
+ if (check_short_pattern(buf, bd))
+ return 1;
+
+ offs += mtd->writesize;
+ }
+ return 0;
+}
+
+/**
+ * create_bbt - [GENERIC] Create a bad block table by scanning the device
+ * @mtd: MTD device structure
+ * @buf: temporary buffer
+ * @bd: descriptor for the good/bad block search pattern
+ * @chip: create the table for a specific chip, -1 read all chips.
+ * Applies only if NAND_BBT_PERCHIP option is set
+ *
+ * Create a bad block table by scanning the device
+ * for the given good/bad block identify pattern
+ */
+static int create_bbt(struct mtd_info *mtd, uint8_t *buf,
+ struct nand_bbt_descr *bd, int chip)
+{
+ struct nand_chip *this = mtd->priv;
+ int i, numblocks, len, scanlen;
+ int startblock;
+ loff_t from;
+ size_t readlen;
+
+ printk(KERN_INFO "Scanning device for bad blocks\n");
+
+ if (bd->options & NAND_BBT_SCANALLPAGES)
+ len = 1 << (this->bbt_erase_shift - this->page_shift);
+ else {
+ if (bd->options & NAND_BBT_SCAN2NDPAGE)
+ len = 2;
+ else
+ len = 1;
+ }
+
+ if (!(bd->options & NAND_BBT_SCANEMPTY)) {
+ /* We need only read few bytes from the OOB area */
+ scanlen = 0;
+ readlen = bd->len;
+ } else {
+ /* Full page content should be read */
+ scanlen = mtd->writesize + mtd->oobsize;
+ readlen = len * mtd->writesize;
+ }
+
+ if (chip == -1) {
+ /* Note that numblocks is 2 * (real numblocks) here, see i+=2
+ * below as it makes shifting and masking less painful */
+ numblocks = mtd->size >> (this->bbt_erase_shift - 1);
+ startblock = 0;
+ from = 0;
+ } else {
+ if (chip >= this->numchips) {
+ printk(KERN_WARNING "create_bbt(): chipnr (%d) > available chips (%d)\n",
+ chip + 1, this->numchips);
+ return -EINVAL;
+ }
+ numblocks = this->chipsize >> (this->bbt_erase_shift - 1);
+ startblock = chip * numblocks;
+ numblocks += startblock;
+ from = startblock << (this->bbt_erase_shift - 1);
+ }
+
+ for (i = startblock; i < numblocks;) {
+ int ret;
+
+ if (bd->options & NAND_BBT_SCANALLPAGES)
+ ret = scan_block_full(mtd, bd, from, buf, readlen,
+ scanlen, len);
+ else
+ ret = scan_block_fast(mtd, bd, from, buf, len);
+
+ if (ret < 0)
+ return ret;
+
+ if (ret) {
+ this->bbt[i >> 3] |= 0x03 << (i & 0x6);
+ printk(KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
+ i >> 1, (unsigned int)from);
+ mtd->ecc_stats.badblocks++;
+ }
+
+ i += 2;
+ from += (1 << this->bbt_erase_shift);
+ }
+ return 0;
+}
+
+/**
+ * search_bbt - [GENERIC] scan the device for a specific bad block table
+ * @mtd: MTD device structure
+ * @buf: temporary buffer
+ * @td: descriptor for the bad block table
+ *
+ * Read the bad block table by searching for a given ident pattern.
+ * Search is preformed either from the beginning up or from the end of
+ * the device downwards. The search starts always at the start of a
+ * block.
+ * If the option NAND_BBT_PERCHIP is given, each chip is searched
+ * for a bbt, which contains the bad block information of this chip.
+ * This is necessary to provide support for certain DOC devices.
+ *
+ * The bbt ident pattern resides in the oob area of the first page
+ * in a block.
+ */
+static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td)
+{
+ struct nand_chip *this = mtd->priv;
+ int i, chips;
+ int bits, startblock, block, dir;
+ int scanlen = mtd->writesize + mtd->oobsize;
+ int bbtblocks;
+ int blocktopage = this->bbt_erase_shift - this->page_shift;
+
+ /* Search direction top -> down ? */
+ if (td->options & NAND_BBT_LASTBLOCK) {
+ startblock = (mtd->size >> this->bbt_erase_shift) - 1;
+ dir = -1;
+ } else {
+ startblock = 0;
+ dir = 1;
+ }
+
+ /* Do we have a bbt per chip ? */
+ if (td->options & NAND_BBT_PERCHIP) {
+ chips = this->numchips;
+ bbtblocks = this->chipsize >> this->bbt_erase_shift;
+ startblock &= bbtblocks - 1;
+ } else {
+ chips = 1;
+ bbtblocks = mtd->size >> this->bbt_erase_shift;
+ }
+
+ /* Number of bits for each erase block in the bbt */
+ bits = td->options & NAND_BBT_NRBITS_MSK;
+
+ for (i = 0; i < chips; i++) {
+ /* Reset version information */
+ td->version[i] = 0;
+ td->pages[i] = -1;
+ /* Scan the maximum number of blocks */
+ for (block = 0; block < td->maxblocks; block++) {
+
+ int actblock = startblock + dir * block;
+ loff_t offs = actblock << this->bbt_erase_shift;
+
+ /* Read first page */
+ scan_read_raw(mtd, buf, offs, mtd->writesize);
+ if (!check_pattern(buf, scanlen, mtd->writesize, td)) {
+ td->pages[i] = actblock << blocktopage;
+ if (td->options & NAND_BBT_VERSION) {
+ td->version[i] = buf[mtd->writesize + td->veroffs];
+ }
+ break;
+ }
+ }
+ startblock += this->chipsize >> this->bbt_erase_shift;
+ }
+ /* Check, if we found a bbt for each requested chip */
+ for (i = 0; i < chips; i++) {
+ if (td->pages[i] == -1)
+ printk(KERN_WARNING "Bad block table not found for chip %d\n", i);
+ else
+ printk(KERN_DEBUG "Bad block table found at page %d, version 0x%02X\n", td->pages[i],
+ td->version[i]);
+ }
+ return 0;
+}
+
+/**
+ * search_read_bbts - [GENERIC] scan the device for bad block table(s)
+ * @mtd: MTD device structure
+ * @buf: temporary buffer
+ * @td: descriptor for the bad block table
+ * @md: descriptor for the bad block table mirror
+ *
+ * Search and read the bad block table(s)
+*/
+static int search_read_bbts(struct mtd_info *mtd, uint8_t * buf, struct nand_bbt_descr *td, struct nand_bbt_descr *md)
+{
+ /* Search the primary table */
+ search_bbt(mtd, buf, td);
+
+ /* Search the mirror table */
+ if (md)
+ search_bbt(mtd, buf, md);
+
+ /* Force result check */
+ return 1;
+}
+
+/**
+ * write_bbt - [GENERIC] (Re)write the bad block table
+ *
+ * @mtd: MTD device structure
+ * @buf: temporary buffer
+ * @td: descriptor for the bad block table
+ * @md: descriptor for the bad block table mirror
+ * @chipsel: selector for a specific chip, -1 for all
+ *
+ * (Re)write the bad block table
+ *
+*/
+static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
+ struct nand_bbt_descr *td, struct nand_bbt_descr *md,
+ int chipsel)
+{
+ struct nand_chip *this = mtd->priv;
+ struct erase_info einfo;
+ int i, j, res, chip = 0;
+ int bits, startblock, dir, page, offs, numblocks, sft, sftmsk;
+ int nrchips, bbtoffs, pageoffs, ooboffs;
+ uint8_t msk[4];
+ uint8_t rcode = td->reserved_block_code;
+ size_t retlen, len = 0;
+ loff_t to;
+ struct mtd_oob_ops ops;
+
+ ops.ooblen = mtd->oobsize;
+ ops.ooboffs = 0;
+ ops.datbuf = NULL;
+ ops.mode = MTD_OOB_PLACE;
+
+ if (!rcode)
+ rcode = 0xff;
+ /* Write bad block table per chip rather than per device ? */
+ if (td->options & NAND_BBT_PERCHIP) {
+ numblocks = (int)(this->chipsize >> this->bbt_erase_shift);
+ /* Full device write or specific chip ? */
+ if (chipsel == -1) {
+ nrchips = this->numchips;
+ } else {
+ nrchips = chipsel + 1;
+ chip = chipsel;
+ }
+ } else {
+ numblocks = (int)(mtd->size >> this->bbt_erase_shift);
+ nrchips = 1;
+ }
+
+ /* Loop through the chips */
+ for (; chip < nrchips; chip++) {
+
+ /* There was already a version of the table, reuse the page
+ * This applies for absolute placement too, as we have the
+ * page nr. in td->pages.
+ */
+ if (td->pages[chip] != -1) {
+ page = td->pages[chip];
+ goto write;
+ }
+
+ /* Automatic placement of the bad block table */
+ /* Search direction top -> down ? */
+ if (td->options & NAND_BBT_LASTBLOCK) {
+ startblock = numblocks * (chip + 1) - 1;
+ dir = -1;
+ } else {
+ startblock = chip * numblocks;
+ dir = 1;
+ }
+
+ for (i = 0; i < td->maxblocks; i++) {
+ int block = startblock + dir * i;
+ /* Check, if the block is bad */
+ switch ((this->bbt[block >> 2] >>
+ (2 * (block & 0x03))) & 0x03) {
+ case 0x01:
+ case 0x03:
+ continue;
+ }
+ page = block <<
+ (this->bbt_erase_shift - this->page_shift);
+ /* Check, if the block is used by the mirror table */
+ if (!md || md->pages[chip] != page)
+ goto write;
+ }
+ printk(KERN_ERR "No space left to write bad block table\n");
+ return -ENOSPC;
+ write:
+
+ /* Set up shift count and masks for the flash table */
+ bits = td->options & NAND_BBT_NRBITS_MSK;
+ msk[2] = ~rcode;
+ switch (bits) {
+ case 1: sft = 3; sftmsk = 0x07; msk[0] = 0x00; msk[1] = 0x01;
+ msk[3] = 0x01;
+ break;
+ case 2: sft = 2; sftmsk = 0x06; msk[0] = 0x00; msk[1] = 0x01;
+ msk[3] = 0x03;
+ break;
+ case 4: sft = 1; sftmsk = 0x04; msk[0] = 0x00; msk[1] = 0x0C;
+ msk[3] = 0x0f;
+ break;
+ case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F;
+ msk[3] = 0xff;
+ break;
+ default: return -EINVAL;
+ }
+
+ bbtoffs = chip * (numblocks >> 2);
+
+ to = ((loff_t) page) << this->page_shift;
+
+ /* Must we save the block contents ? */
+ if (td->options & NAND_BBT_SAVECONTENT) {
+ /* Make it block aligned */
+ to &= ~((loff_t) ((1 << this->bbt_erase_shift) - 1));
+ len = 1 << this->bbt_erase_shift;
+ res = mtd->read(mtd, to, len, &retlen, buf);
+ if (res < 0) {
+ if (retlen != len) {
+ printk(KERN_INFO "nand_bbt: Error "
+ "reading block for writing "
+ "the bad block table\n");
+ return res;
+ }
+ printk(KERN_WARNING "nand_bbt: ECC error "
+ "while reading block for writing "
+ "bad block table\n");
+ }
+ /* Read oob data */
+ ops.ooblen = (len >> this->page_shift) * mtd->oobsize;
+ ops.oobbuf = &buf[len];
+ res = mtd->read_oob(mtd, to + mtd->writesize, &ops);
+ if (res < 0 || ops.oobretlen != ops.ooblen)
+ goto outerr;
+
+ /* Calc the byte offset in the buffer */
+ pageoffs = page - (int)(to >> this->page_shift);
+ offs = pageoffs << this->page_shift;
+ /* Preset the bbt area with 0xff */
+ memset(&buf[offs], 0xff, (size_t) (numblocks >> sft));
+ ooboffs = len + (pageoffs * mtd->oobsize);
+
+ } else {
+ /* Calc length */
+ len = (size_t) (numblocks >> sft);
+ /* Make it page aligned ! */
+ len = (len + (mtd->writesize - 1)) &
+ ~(mtd->writesize - 1);
+ /* Preset the buffer with 0xff */
+ memset(buf, 0xff, len +
+ (len >> this->page_shift)* mtd->oobsize);
+ offs = 0;
+ ooboffs = len;
+ /* Pattern is located in oob area of first page */
+ memcpy(&buf[ooboffs + td->offs], td->pattern, td->len);
+ }
+
+ if (td->options & NAND_BBT_VERSION)
+ buf[ooboffs + td->veroffs] = td->version[chip];
+
+ /* walk through the memory table */
+ for (i = 0; i < numblocks;) {
+ uint8_t dat;
+ dat = this->bbt[bbtoffs + (i >> 2)];
+ for (j = 0; j < 4; j++, i++) {
+ int sftcnt = (i << (3 - sft)) & sftmsk;
+ /* Do not store the reserved bbt blocks ! */
+ buf[offs + (i >> sft)] &=
+ ~(msk[dat & 0x03] << sftcnt);
+ dat >>= 2;
+ }
+ }
+
+ memset(&einfo, 0, sizeof(einfo));
+ einfo.mtd = mtd;
+ einfo.addr = (unsigned long)to;
+ einfo.len = 1 << this->bbt_erase_shift;
+ res = nand_erase_nand(mtd, &einfo, 1);
+ if (res < 0)
+ goto outerr;
+
+ res = scan_write_bbt(mtd, to, len, buf, &buf[len]);
+ if (res < 0)
+ goto outerr;
+
+ printk(KERN_DEBUG "Bad block table written to 0x%08x, version "
+ "0x%02X\n", (unsigned int)to, td->version[chip]);
+
+ /* Mark it as used */
+ td->pages[chip] = page;
+ }
+ return 0;
+
+ outerr:
+ printk(KERN_WARNING
+ "nand_bbt: Error while writing bad block table %d\n", res);
+ return res;
+}
+
+/**
+ * nand_memory_bbt - [GENERIC] create a memory based bad block table
+ * @mtd: MTD device structure
+ * @bd: descriptor for the good/bad block search pattern
+ *
+ * The function creates a memory based bbt by scanning the device
+ * for manufacturer / software marked good / bad blocks
+*/
+static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
+{
+ struct nand_chip *this = mtd->priv;
+
+ bd->options &= ~NAND_BBT_SCANEMPTY;
+ return create_bbt(mtd, this->buffers->databuf, bd, -1);
+}
+
+/**
+ * check_create - [GENERIC] create and write bbt(s) if necessary
+ * @mtd: MTD device structure
+ * @buf: temporary buffer
+ * @bd: descriptor for the good/bad block search pattern
+ *
+ * The function checks the results of the previous call to read_bbt
+ * and creates / updates the bbt(s) if necessary
+ * Creation is necessary if no bbt was found for the chip/device
+ * Update is necessary if one of the tables is missing or the
+ * version nr. of one table is less than the other
+*/
+static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd)
+{
+ int i, chips, writeops, chipsel, res;
+ struct nand_chip *this = mtd->priv;
+ struct nand_bbt_descr *td = this->bbt_td;
+ struct nand_bbt_descr *md = this->bbt_md;
+ struct nand_bbt_descr *rd, *rd2;
+
+ /* Do we have a bbt per chip ? */
+ if (td->options & NAND_BBT_PERCHIP)
+ chips = this->numchips;
+ else
+ chips = 1;
+
+ for (i = 0; i < chips; i++) {
+ writeops = 0;
+ rd = NULL;
+ rd2 = NULL;
+ /* Per chip or per device ? */
+ chipsel = (td->options & NAND_BBT_PERCHIP) ? i : -1;
+ /* Mirrored table avilable ? */
+ if (md) {
+ if (td->pages[i] == -1 && md->pages[i] == -1) {
+ writeops = 0x03;
+ goto create;
+ }
+
+ if (td->pages[i] == -1) {
+ rd = md;
+ td->version[i] = md->version[i];
+ writeops = 1;
+ goto writecheck;
+ }
+
+ if (md->pages[i] == -1) {
+ rd = td;
+ md->version[i] = td->version[i];
+ writeops = 2;
+ goto writecheck;
+ }
+
+ if (td->version[i] == md->version[i]) {
+ rd = td;
+ if (!(td->options & NAND_BBT_VERSION))
+ rd2 = md;
+ goto writecheck;
+ }
+
+ if (((int8_t) (td->version[i] - md->version[i])) > 0) {
+ rd = td;
+ md->version[i] = td->version[i];
+ writeops = 2;
+ } else {
+ rd = md;
+ td->version[i] = md->version[i];
+ writeops = 1;
+ }
+
+ goto writecheck;
+
+ } else {
+ if (td->pages[i] == -1) {
+ writeops = 0x01;
+ goto create;
+ }
+ rd = td;
+ goto writecheck;
+ }
+ create:
+ /* Create the bad block table by scanning the device ? */
+ if (!(td->options & NAND_BBT_CREATE))
+ continue;
+
+ /* Create the table in memory by scanning the chip(s) */
+ create_bbt(mtd, buf, bd, chipsel);
+
+ td->version[i] = 1;
+ if (md)
+ md->version[i] = 1;
+ writecheck:
+ /* read back first ? */
+ if (rd)
+ read_abs_bbt(mtd, buf, rd, chipsel);
+ /* If they weren't versioned, read both. */
+ if (rd2)
+ read_abs_bbt(mtd, buf, rd2, chipsel);
+
+ /* Write the bad block table to the device ? */
+ if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) {
+ res = write_bbt(mtd, buf, td, md, chipsel);
+ if (res < 0)
+ return res;
+ }
+
+ /* Write the mirror bad block table to the device ? */
+ if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) {
+ res = write_bbt(mtd, buf, md, td, chipsel);
+ if (res < 0)
+ return res;
+ }
+ }
+ return 0;
+}
+
+/**
+ * mark_bbt_regions - [GENERIC] mark the bad block table regions
+ * @mtd: MTD device structure
+ * @td: bad block table descriptor
+ *
+ * The bad block table regions are marked as "bad" to prevent
+ * accidental erasures / writes. The regions are identified by
+ * the mark 0x02.
+*/
+static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)
+{
+ struct nand_chip *this = mtd->priv;
+ int i, j, chips, block, nrblocks, update;
+ uint8_t oldval, newval;
+
+ /* Do we have a bbt per chip ? */
+ if (td->options & NAND_BBT_PERCHIP) {
+ chips = this->numchips;
+ nrblocks = (int)(this->chipsize >> this->bbt_erase_shift);
+ } else {
+ chips = 1;
+ nrblocks = (int)(mtd->size >> this->bbt_erase_shift);
+ }
+
+ for (i = 0; i < chips; i++) {
+ if ((td->options & NAND_BBT_ABSPAGE) ||
+ !(td->options & NAND_BBT_WRITE)) {
+ if (td->pages[i] == -1)
+ continue;
+ block = td->pages[i] >> (this->bbt_erase_shift - this->page_shift);
+ block <<= 1;
+ oldval = this->bbt[(block >> 3)];
+ newval = oldval | (0x2 << (block & 0x06));
+ this->bbt[(block >> 3)] = newval;
+ if ((oldval != newval) && td->reserved_block_code)
+ nand_update_bbt(mtd, block << (this->bbt_erase_shift - 1));
+ continue;
+ }
+ update = 0;
+ if (td->options & NAND_BBT_LASTBLOCK)
+ block = ((i + 1) * nrblocks) - td->maxblocks;
+ else
+ block = i * nrblocks;
+ block <<= 1;
+ for (j = 0; j < td->maxblocks; j++) {
+ oldval = this->bbt[(block >> 3)];
+ newval = oldval | (0x2 << (block & 0x06));
+ this->bbt[(block >> 3)] = newval;
+ if (oldval != newval)
+ update = 1;
+ block += 2;
+ }
+ /* If we want reserved blocks to be recorded to flash, and some
+ new ones have been marked, then we need to update the stored
+ bbts. This should only happen once. */
+ if (update && td->reserved_block_code)
+ nand_update_bbt(mtd, (block - 2) << (this->bbt_erase_shift - 1));
+ }
+}
+
+/**
+ * nand_scan_bbt - [NAND Interface] scan, find, read and maybe create bad block table(s)
+ * @mtd: MTD device structure
+ * @bd: descriptor for the good/bad block search pattern
+ *
+ * The function checks, if a bad block table(s) is/are already
+ * available. If not it scans the device for manufacturer
+ * marked good / bad blocks and writes the bad block table(s) to
+ * the selected place.
+ *
+ * The bad block table memory is allocated here. It must be freed
+ * by calling the nand_free_bbt function.
+ *
+*/
+int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
+{
+ struct nand_chip *this = mtd->priv;
+ int len, res = 0;
+ uint8_t *buf;
+ struct nand_bbt_descr *td = this->bbt_td;
+ struct nand_bbt_descr *md = this->bbt_md;
+
+ len = mtd->size >> (this->bbt_erase_shift + 2);
+ /* Allocate memory (2bit per block) and clear the memory bad block table */
+ this->bbt = kzalloc(len, GFP_KERNEL);
+ if (!this->bbt) {
+ printk(KERN_ERR "nand_scan_bbt: Out of memory\n");
+ return -ENOMEM;
+ }
+
+ /* If no primary table decriptor is given, scan the device
+ * to build a memory based bad block table
+ */
+ if (!td) {
+ if ((res = nand_memory_bbt(mtd, bd))) {
+ printk(KERN_ERR "nand_bbt: Can't scan flash and build the RAM-based BBT\n");
+ kfree(this->bbt);
+ this->bbt = NULL;
+ }
+ return res;
+ }
+
+ /* Allocate a temporary buffer for one eraseblock incl. oob */
+ len = (1 << this->bbt_erase_shift);
+ len += (len >> this->page_shift) * mtd->oobsize;
+ buf = vmalloc(len);
+ if (!buf) {
+ printk(KERN_ERR "nand_bbt: Out of memory\n");
+ kfree(this->bbt);
+ this->bbt = NULL;
+ return -ENOMEM;
+ }
+
+ /* Is the bbt at a given page ? */
+ if (td->options & NAND_BBT_ABSPAGE) {
+ res = read_abs_bbts(mtd, buf, td, md);
+ } else {
+ /* Search the bad block table using a pattern in oob */
+ res = search_read_bbts(mtd, buf, td, md);
+ }
+
+ if (res)
+ res = check_create(mtd, buf, bd);
+
+ /* Prevent the bbt regions from erasing / writing */
+ mark_bbt_region(mtd, td);
+ if (md)
+ mark_bbt_region(mtd, md);
+
+ vfree(buf);
+ return res;
+}
+
+/**
+ * nand_update_bbt - [NAND Interface] update bad block table(s)
+ * @mtd: MTD device structure
+ * @offs: the offset of the newly marked block
+ *
+ * The function updates the bad block table(s)
+*/
+int nand_update_bbt(struct mtd_info *mtd, loff_t offs)
+{
+ struct nand_chip *this = mtd->priv;
+ int len, res = 0, writeops = 0;
+ int chip, chipsel;
+ uint8_t *buf;
+ struct nand_bbt_descr *td = this->bbt_td;
+ struct nand_bbt_descr *md = this->bbt_md;
+
+ if (!this->bbt || !td)
+ return -EINVAL;
+
+ len = mtd->size >> (this->bbt_erase_shift + 2);
+ /* Allocate a temporary buffer for one eraseblock incl. oob */
+ len = (1 << this->bbt_erase_shift);
+ len += (len >> this->page_shift) * mtd->oobsize;
+ buf = kmalloc(len, GFP_KERNEL);
+ if (!buf) {
+ printk(KERN_ERR "nand_update_bbt: Out of memory\n");
+ return -ENOMEM;
+ }
+
+ writeops = md != NULL ? 0x03 : 0x01;
+
+ /* Do we have a bbt per chip ? */
+ if (td->options & NAND_BBT_PERCHIP) {
+ chip = (int)(offs >> this->chip_shift);
+ chipsel = chip;
+ } else {
+ chip = 0;
+ chipsel = -1;
+ }
+
+ td->version[chip]++;
+ if (md)
+ md->version[chip]++;
+
+ /* Write the bad block table to the device ? */
+ if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) {
+ res = write_bbt(mtd, buf, td, md, chipsel);
+ if (res < 0)
+ goto out;
+ }
+ /* Write the mirror bad block table to the device ? */
+ if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) {
+ res = write_bbt(mtd, buf, md, td, chipsel);
+ }
+
+ out:
+ kfree(buf);
+ return res;
+}
+
+/* Define some generic bad / good block scan pattern which are used
+ * while scanning a device for factory marked good / bad blocks. */
+static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
+
+static struct nand_bbt_descr smallpage_memorybased = {
+ .options = NAND_BBT_SCAN2NDPAGE,
+ .offs = 5,
+ .len = 1,
+ .pattern = scan_ff_pattern
+};
+
+static struct nand_bbt_descr largepage_memorybased = {
+ .options = 0,
+ .offs = 0,
+ .len = 2,
+ .pattern = scan_ff_pattern
+};
+
+static struct nand_bbt_descr smallpage_flashbased = {
+ .options = NAND_BBT_SCAN2NDPAGE,
+ .offs = 5,
+ .len = 1,
+ .pattern = scan_ff_pattern
+};
+
+static struct nand_bbt_descr largepage_flashbased = {
+ .options = NAND_BBT_SCAN2NDPAGE,
+ .offs = 0,
+ .len = 2,
+ .pattern = scan_ff_pattern
+};
+
+static uint8_t scan_agand_pattern[] = { 0x1C, 0x71, 0xC7, 0x1C, 0x71, 0xC7 };
+
+static struct nand_bbt_descr agand_flashbased = {
+ .options = NAND_BBT_SCANEMPTY | NAND_BBT_SCANALLPAGES,
+ .offs = 0x20,
+ .len = 6,
+ .pattern = scan_agand_pattern
+};
+
+/* Generic flash bbt decriptors
+*/
+static uint8_t bbt_pattern[] = {'B', 'b', 't', '0' };
+static uint8_t mirror_pattern[] = {'1', 't', 'b', 'B' };
+
+static struct nand_bbt_descr bbt_main_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+ .offs = 8,
+ .len = 4,
+ .veroffs = 12,
+ .maxblocks = 4,
+ .pattern = bbt_pattern
+};
+
+static struct nand_bbt_descr bbt_mirror_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+ .offs = 8,
+ .len = 4,
+ .veroffs = 12,
+ .maxblocks = 4,
+ .pattern = mirror_pattern
+};
+
+/**
+ * nand_default_bbt - [NAND Interface] Select a default bad block table for the device
+ * @mtd: MTD device structure
+ *
+ * This function selects the default bad block table
+ * support for the device and calls the nand_scan_bbt function
+ *
+*/
+int nand_default_bbt(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+
+ /* Default for AG-AND. We must use a flash based
+ * bad block table as the devices have factory marked
+ * _good_ blocks. Erasing those blocks leads to loss
+ * of the good / bad information, so we _must_ store
+ * this information in a good / bad table during
+ * startup
+ */
+ if (this->options & NAND_IS_AND) {
+ /* Use the default pattern descriptors */
+ if (!this->bbt_td) {
+ this->bbt_td = &bbt_main_descr;
+ this->bbt_md = &bbt_mirror_descr;
+ }
+ this->options |= NAND_USE_FLASH_BBT;
+ return nand_scan_bbt(mtd, &agand_flashbased);
+ }
+
+ /* Is a flash based bad block table requested ? */
+ if (this->options & NAND_USE_FLASH_BBT) {
+ /* Use the default pattern descriptors */
+ if (!this->bbt_td) {
+ this->bbt_td = &bbt_main_descr;
+ this->bbt_md = &bbt_mirror_descr;
+ }
+ if (!this->badblock_pattern) {
+ this->badblock_pattern = (mtd->writesize > 512) ? &largepage_flashbased : &smallpage_flashbased;
+ }
+ } else {
+ this->bbt_td = NULL;
+ this->bbt_md = NULL;
+ if (!this->badblock_pattern) {
+ this->badblock_pattern = (mtd->writesize > 512) ?
+ &largepage_memorybased : &smallpage_memorybased;
+ }
+ }
+ return nand_scan_bbt(mtd, this->badblock_pattern);
+}
+
+/**
+ * nand_isbad_bbt - [NAND Interface] Check if a block is bad
+ * @mtd: MTD device structure
+ * @offs: offset in the device
+ * @allowbbt: allow access to bad block table region
+ *
+*/
+int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
+{
+ struct nand_chip *this = mtd->priv;
+ int block;
+ uint8_t res;
+
+ /* Get block number * 2 */
+ block = (int)(offs >> (this->bbt_erase_shift - 1));
+ res = (this->bbt[block >> 3] >> (block & 0x06)) & 0x03;
+
+ MTD_DEBUG(MTD_DEBUG_LEVEL2, "nand_isbad_bbt(): bbt info for offs 0x%08x: (block %d) 0x%02x\n",
+ (unsigned int)offs, block >> 1, res);
+
+ switch ((int)res) {
+ case 0x00:
+ return 0;
+ case 0x01:
+ return 1;
+ case 0x02:
+ return allowbbt ? 0 : 1;
+ }
+ return 1;
+}
+
+EXPORT_SYMBOL(nand_scan_bbt);
+EXPORT_SYMBOL(nand_default_bbt);
+
+#endif /* DOXYGEN_SHOULD_SKIP_THIS */
diff --git a/drivers/mtd/nand/nand_ecc.c b/drivers/mtd/nand/nand_ecc.c
new file mode 100644
index 0000000..266d573
--- /dev/null
+++ b/drivers/mtd/nand/nand_ecc.c
@@ -0,0 +1,198 @@
+/*
+ * This file contains an ECC algorithm from Toshiba that detects and
+ * corrects 1 bit errors in a 256 byte block of data.
+ *
+ * drivers/mtd/nand/nand_ecc.c
+ *
+ * Copyright (C) 2000-2004 Steven J. Hill (sjhill@realitydiluted.com)
+ * Toshiba America Electronics Components, Inc.
+ *
+ * Copyright (C) 2006 Thomas Gleixner <tglx@linutronix.de>
+ *
+ * $Id: nand_ecc.c,v 1.15 2005/11/07 11:14:30 gleixner Exp $
+ *
+ * This file is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 or (at your option) any
+ * later version.
+ *
+ * This file is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this file; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * As a special exception, if other files instantiate templates or use
+ * macros or inline functions from these files, or you compile these
+ * files and link them with other works to produce a work based on these
+ * files, these files do not by themselves cause the resulting work to be
+ * covered by the GNU General Public License. However the source code for
+ * these files must still be made available in accordance with section (3)
+ * of the GNU General Public License.
+ *
+ * This exception does not invalidate any other reasons why a work based on
+ * this file might be covered by the GNU General Public License.
+ */
+
+#include <linux/types.h>
+#include <common.h>
+#include <errno.h>
+#include <linux/mtd/nand_ecc.h>
+
+/*
+ * Pre-calculated 256-way 1 byte column parity
+ */
+static const u_char nand_ecc_precalc_table[] = {
+ 0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a, 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00,
+ 0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f, 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
+ 0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c, 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
+ 0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59, 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
+ 0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33, 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
+ 0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56, 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
+ 0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55, 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
+ 0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30, 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
+ 0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30, 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
+ 0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55, 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
+ 0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56, 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
+ 0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33, 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
+ 0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59, 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
+ 0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c, 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
+ 0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f, 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
+ 0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a, 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00
+};
+
+/**
+ * nand_calculate_ecc - [NAND Interface] Calculate 3-byte ECC for 256-byte block
+ * @mtd: MTD block structure
+ * @dat: raw data
+ * @ecc_code: buffer for ECC
+ */
+int nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
+ u_char *ecc_code)
+{
+ uint8_t idx, reg1, reg2, reg3, tmp1, tmp2;
+ int i;
+
+ /* Initialize variables */
+ reg1 = reg2 = reg3 = 0;
+
+ /* Build up column parity */
+ for(i = 0; i < 256; i++) {
+ /* Get CP0 - CP5 from table */
+ idx = nand_ecc_precalc_table[*dat++];
+ reg1 ^= (idx & 0x3f);
+
+ /* All bit XOR = 1 ? */
+ if (idx & 0x40) {
+ reg3 ^= (uint8_t) i;
+ reg2 ^= ~((uint8_t) i);
+ }
+ }
+
+ /* Create non-inverted ECC code from line parity */
+ tmp1 = (reg3 & 0x80) >> 0; /* B7 -> B7 */
+ tmp1 |= (reg2 & 0x80) >> 1; /* B7 -> B6 */
+ tmp1 |= (reg3 & 0x40) >> 1; /* B6 -> B5 */
+ tmp1 |= (reg2 & 0x40) >> 2; /* B6 -> B4 */
+ tmp1 |= (reg3 & 0x20) >> 2; /* B5 -> B3 */
+ tmp1 |= (reg2 & 0x20) >> 3; /* B5 -> B2 */
+ tmp1 |= (reg3 & 0x10) >> 3; /* B4 -> B1 */
+ tmp1 |= (reg2 & 0x10) >> 4; /* B4 -> B0 */
+
+ tmp2 = (reg3 & 0x08) << 4; /* B3 -> B7 */
+ tmp2 |= (reg2 & 0x08) << 3; /* B3 -> B6 */
+ tmp2 |= (reg3 & 0x04) << 3; /* B2 -> B5 */
+ tmp2 |= (reg2 & 0x04) << 2; /* B2 -> B4 */
+ tmp2 |= (reg3 & 0x02) << 2; /* B1 -> B3 */
+ tmp2 |= (reg2 & 0x02) << 1; /* B1 -> B2 */
+ tmp2 |= (reg3 & 0x01) << 1; /* B0 -> B1 */
+ tmp2 |= (reg2 & 0x01) << 0; /* B7 -> B0 */
+
+ /* Calculate final ECC code */
+#ifdef CONFIG_MTD_NAND_ECC_SMC
+ ecc_code[0] = ~tmp2;
+ ecc_code[1] = ~tmp1;
+#else
+ ecc_code[0] = ~tmp1;
+ ecc_code[1] = ~tmp2;
+#endif
+ ecc_code[2] = ((~reg1) << 2) | 0x03;
+
+ return 0;
+}
+EXPORT_SYMBOL(nand_calculate_ecc);
+
+static inline int countbits(uint32_t byte)
+{
+ int res = 0;
+
+ for (;byte; byte >>= 1)
+ res += byte & 0x01;
+ return res;
+}
+
+/**
+ * nand_correct_data - [NAND Interface] Detect and correct bit error(s)
+ * @mtd: MTD block structure
+ * @dat: raw data read from the chip
+ * @read_ecc: ECC from the chip
+ * @calc_ecc: the ECC calculated from raw data
+ *
+ * Detect and correct a 1 bit error for 256 byte block
+ */
+int nand_correct_data(struct mtd_info *mtd, u_char *dat,
+ u_char *read_ecc, u_char *calc_ecc)
+{
+ uint8_t s0, s1, s2;
+
+#ifdef CONFIG_MTD_NAND_ECC_SMC
+ s0 = calc_ecc[0] ^ read_ecc[0];
+ s1 = calc_ecc[1] ^ read_ecc[1];
+ s2 = calc_ecc[2] ^ read_ecc[2];
+#else
+ s1 = calc_ecc[0] ^ read_ecc[0];
+ s0 = calc_ecc[1] ^ read_ecc[1];
+ s2 = calc_ecc[2] ^ read_ecc[2];
+#endif
+ if ((s0 | s1 | s2) == 0)
+ return 0;
+
+ /* Check for a single bit error */
+ if( ((s0 ^ (s0 >> 1)) & 0x55) == 0x55 &&
+ ((s1 ^ (s1 >> 1)) & 0x55) == 0x55 &&
+ ((s2 ^ (s2 >> 1)) & 0x54) == 0x54) {
+
+ uint32_t byteoffs, bitnum;
+
+ byteoffs = (s1 << 0) & 0x80;
+ byteoffs |= (s1 << 1) & 0x40;
+ byteoffs |= (s1 << 2) & 0x20;
+ byteoffs |= (s1 << 3) & 0x10;
+
+ byteoffs |= (s0 >> 4) & 0x08;
+ byteoffs |= (s0 >> 3) & 0x04;
+ byteoffs |= (s0 >> 2) & 0x02;
+ byteoffs |= (s0 >> 1) & 0x01;
+
+ bitnum = (s2 >> 5) & 0x04;
+ bitnum |= (s2 >> 4) & 0x02;
+ bitnum |= (s2 >> 3) & 0x01;
+
+ dat[byteoffs] ^= (1 << bitnum);
+
+ return 1;
+ }
+
+ if(countbits(s0 | ((uint32_t)s1 << 8) | ((uint32_t)s2 <<16)) == 1)
+ return 1;
+
+ return -EBADMSG;
+}
+EXPORT_SYMBOL(nand_correct_data);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Steven J. Hill <sjhill@realitydiluted.com>");
+MODULE_DESCRIPTION("Generic NAND ECC support");
diff --git a/drivers/mtd/nand/nand_ids.c b/drivers/mtd/nand/nand_ids.c
new file mode 100644
index 0000000..f95975c
--- /dev/null
+++ b/drivers/mtd/nand/nand_ids.c
@@ -0,0 +1,153 @@
+/*
+ * drivers/mtd/nandids.c
+ *
+ * Copyright (C) 2002 Thomas Gleixner (tglx@linutronix.de)
+ *
+ * $Id: nand_ids.c,v 1.16 2005/11/07 11:14:31 gleixner Exp $
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <common.h>
+#include <linux/mtd/nand.h>
+/*
+* Chip ID list
+*
+* Name. ID code, pagesize, chipsize in MegaByte, eraseblock size,
+* options
+*
+* Pagesize; 0, 256, 512
+* 0 get this information from the extended chip ID
++ 256 256 Byte page size
+* 512 512 Byte page size
+*/
+struct nand_flash_dev nand_flash_ids[] = {
+
+#ifdef CONFIG_MTD_NAND_MUSEUM_IDS
+ {"NAND 1MiB 5V 8-bit", 0x6e, 256, 1, 0x1000, 0},
+ {"NAND 2MiB 5V 8-bit", 0x64, 256, 2, 0x1000, 0},
+ {"NAND 4MiB 5V 8-bit", 0x6b, 512, 4, 0x2000, 0},
+ {"NAND 1MiB 3,3V 8-bit", 0xe8, 256, 1, 0x1000, 0},
+ {"NAND 1MiB 3,3V 8-bit", 0xec, 256, 1, 0x1000, 0},
+ {"NAND 2MiB 3,3V 8-bit", 0xea, 256, 2, 0x1000, 0},
+ {"NAND 4MiB 3,3V 8-bit", 0xd5, 512, 4, 0x2000, 0},
+ {"NAND 4MiB 3,3V 8-bit", 0xe3, 512, 4, 0x2000, 0},
+ {"NAND 4MiB 3,3V 8-bit", 0xe5, 512, 4, 0x2000, 0},
+ {"NAND 8MiB 3,3V 8-bit", 0xd6, 512, 8, 0x2000, 0},
+
+ {"NAND 8MiB 1,8V 8-bit", 0x39, 512, 8, 0x2000, 0},
+ {"NAND 8MiB 3,3V 8-bit", 0xe6, 512, 8, 0x2000, 0},
+ {"NAND 8MiB 1,8V 16-bit", 0x49, 512, 8, 0x2000, NAND_BUSWIDTH_16},
+ {"NAND 8MiB 3,3V 16-bit", 0x59, 512, 8, 0x2000, NAND_BUSWIDTH_16},
+#endif
+
+ {"NAND 16MiB 1,8V 8-bit", 0x33, 512, 16, 0x4000, 0},
+ {"NAND 16MiB 3,3V 8-bit", 0x73, 512, 16, 0x4000, 0},
+ {"NAND 16MiB 1,8V 16-bit", 0x43, 512, 16, 0x4000, NAND_BUSWIDTH_16},
+ {"NAND 16MiB 3,3V 16-bit", 0x53, 512, 16, 0x4000, NAND_BUSWIDTH_16},
+
+ {"NAND 32MiB 1,8V 8-bit", 0x35, 512, 32, 0x4000, 0},
+ {"NAND 32MiB 3,3V 8-bit", 0x75, 512, 32, 0x4000, 0},
+ {"NAND 32MiB 1,8V 16-bit", 0x45, 512, 32, 0x4000, NAND_BUSWIDTH_16},
+ {"NAND 32MiB 3,3V 16-bit", 0x55, 512, 32, 0x4000, NAND_BUSWIDTH_16},
+
+ {"NAND 64MiB 1,8V 8-bit", 0x36, 512, 64, 0x4000, 0},
+ {"NAND 64MiB 3,3V 8-bit", 0x76, 512, 64, 0x4000, 0},
+ {"NAND 64MiB 1,8V 16-bit", 0x46, 512, 64, 0x4000, NAND_BUSWIDTH_16},
+ {"NAND 64MiB 3,3V 16-bit", 0x56, 512, 64, 0x4000, NAND_BUSWIDTH_16},
+
+ {"NAND 128MiB 1,8V 8-bit", 0x78, 512, 128, 0x4000, 0},
+ {"NAND 128MiB 1,8V 8-bit", 0x39, 512, 128, 0x4000, 0},
+ {"NAND 128MiB 3,3V 8-bit", 0x79, 512, 128, 0x4000, 0},
+ {"NAND 128MiB 1,8V 16-bit", 0x72, 512, 128, 0x4000, NAND_BUSWIDTH_16},
+ {"NAND 128MiB 1,8V 16-bit", 0x49, 512, 128, 0x4000, NAND_BUSWIDTH_16},
+ {"NAND 128MiB 3,3V 16-bit", 0x74, 512, 128, 0x4000, NAND_BUSWIDTH_16},
+ {"NAND 128MiB 3,3V 16-bit", 0x59, 512, 128, 0x4000, NAND_BUSWIDTH_16},
+
+ {"NAND 256MiB 3,3V 8-bit", 0x71, 512, 256, 0x4000, 0},
+
+ /*
+ * These are the new chips with large page size. The pagesize and the
+ * erasesize is determined from the extended id bytes
+ */
+#define LP_OPTIONS (NAND_SAMSUNG_LP_OPTIONS | NAND_NO_READRDY | NAND_NO_AUTOINCR)
+#define LP_OPTIONS16 (LP_OPTIONS | NAND_BUSWIDTH_16)
+
+ /*512 Megabit */
+ {"NAND 64MiB 1,8V 8-bit", 0xA2, 0, 64, 0, LP_OPTIONS},
+ {"NAND 64MiB 3,3V 8-bit", 0xF2, 0, 64, 0, LP_OPTIONS},
+ {"NAND 64MiB 1,8V 16-bit", 0xB2, 0, 64, 0, LP_OPTIONS16},
+ {"NAND 64MiB 3,3V 16-bit", 0xC2, 0, 64, 0, LP_OPTIONS16},
+
+ /* 1 Gigabit */
+ {"NAND 128MiB 1,8V 8-bit", 0xA1, 0, 128, 0, LP_OPTIONS},
+ {"NAND 128MiB 3,3V 8-bit", 0xF1, 0, 128, 0, LP_OPTIONS},
+ {"NAND 128MiB 1,8V 16-bit", 0xB1, 0, 128, 0, LP_OPTIONS16},
+ {"NAND 128MiB 3,3V 16-bit", 0xC1, 0, 128, 0, LP_OPTIONS16},
+
+ /* 2 Gigabit */
+ {"NAND 256MiB 1,8V 8-bit", 0xAA, 0, 256, 0, LP_OPTIONS},
+ {"NAND 256MiB 3,3V 8-bit", 0xDA, 0, 256, 0, LP_OPTIONS},
+ {"NAND 256MiB 1,8V 16-bit", 0xBA, 0, 256, 0, LP_OPTIONS16},
+ {"NAND 256MiB 3,3V 16-bit", 0xCA, 0, 256, 0, LP_OPTIONS16},
+
+ /* 4 Gigabit */
+ {"NAND 512MiB 1,8V 8-bit", 0xAC, 0, 512, 0, LP_OPTIONS},
+ {"NAND 512MiB 3,3V 8-bit", 0xDC, 0, 512, 0, LP_OPTIONS},
+ {"NAND 512MiB 1,8V 16-bit", 0xBC, 0, 512, 0, LP_OPTIONS16},
+ {"NAND 512MiB 3,3V 16-bit", 0xCC, 0, 512, 0, LP_OPTIONS16},
+
+ /* 8 Gigabit */
+ {"NAND 1GiB 1,8V 8-bit", 0xA3, 0, 1024, 0, LP_OPTIONS},
+ {"NAND 1GiB 3,3V 8-bit", 0xD3, 0, 1024, 0, LP_OPTIONS},
+ {"NAND 1GiB 1,8V 16-bit", 0xB3, 0, 1024, 0, LP_OPTIONS16},
+ {"NAND 1GiB 3,3V 16-bit", 0xC3, 0, 1024, 0, LP_OPTIONS16},
+
+ /* 16 Gigabit */
+ {"NAND 2GiB 1,8V 8-bit", 0xA5, 0, 2048, 0, LP_OPTIONS},
+ {"NAND 2GiB 3,3V 8-bit", 0xD5, 0, 2048, 0, LP_OPTIONS},
+ {"NAND 2GiB 1,8V 16-bit", 0xB5, 0, 2048, 0, LP_OPTIONS16},
+ {"NAND 2GiB 3,3V 16-bit", 0xC5, 0, 2048, 0, LP_OPTIONS16},
+
+ /*
+ * Renesas AND 1 Gigabit. Those chips do not support extended id and
+ * have a strange page/block layout ! The chosen minimum erasesize is
+ * 4 * 2 * 2048 = 16384 Byte, as those chips have an array of 4 page
+ * planes 1 block = 2 pages, but due to plane arrangement the blocks
+ * 0-3 consists of page 0 + 4,1 + 5, 2 + 6, 3 + 7 Anyway JFFS2 would
+ * increase the eraseblock size so we chose a combined one which can be
+ * erased in one go There are more speed improvements for reads and
+ * writes possible, but not implemented now
+ */
+ {"AND 128MiB 3,3V 8-bit", 0x01, 2048, 128, 0x4000,
+ NAND_IS_AND | NAND_NO_AUTOINCR |NAND_NO_READRDY | NAND_4PAGE_ARRAY |
+ BBT_AUTO_REFRESH
+ },
+
+ {NULL,}
+};
+
+/*
+* Manufacturer ID list
+*/
+struct nand_manufacturers nand_manuf_ids[] = {
+ {NAND_MFR_TOSHIBA, "Toshiba"},
+ {NAND_MFR_SAMSUNG, "Samsung"},
+ {NAND_MFR_FUJITSU, "Fujitsu"},
+ {NAND_MFR_NATIONAL, "National"},
+ {NAND_MFR_RENESAS, "Renesas"},
+ {NAND_MFR_STMICRO, "ST Micro"},
+ {NAND_MFR_HYNIX, "Hynix"},
+ {NAND_MFR_MICRON, "Micron"},
+ {NAND_MFR_AMD, "AMD"},
+ {0x0, "Unknown"}
+};
+
+EXPORT_SYMBOL(nand_manuf_ids);
+EXPORT_SYMBOL(nand_flash_ids);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
+MODULE_DESCRIPTION("Nand device & manufacturer IDs");
diff --git a/drivers/mtd/nand/nand_imx.c b/drivers/mtd/nand/nand_imx.c
new file mode 100644
index 0000000..74cdf10
--- /dev/null
+++ b/drivers/mtd/nand/nand_imx.c
@@ -0,0 +1,1210 @@
+/*
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/*
+ * MX21 Hardware contains a bug which causes HW ECC to fail for two
+ * consecutive read pages containing 1bit Errors (See MX21 Chip Erata,
+ * Erratum 16). Use software ECC for this chip.
+ */
+
+#include <common.h>
+#include <driver.h>
+#include <malloc.h>
+#include <init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <mach/generic.h>
+#include <mach/imx-nand.h>
+#include <mach/imx-regs.h>
+#include <asm/io.h>
+#include <errno.h>
+
+#define DVR_VER "2.0"
+
+#define nfc_is_v21() (cpu_is_mx25() || cpu_is_mx35())
+#define nfc_is_v1() (cpu_is_mx31() || cpu_is_mx27() || cpu_is_mx21())
+
+/*
+ * Addresses for NFC registers
+ */
+#define NFC_BUF_SIZE 0xE00
+#define NFC_BUF_ADDR 0xE04
+#define NFC_FLASH_ADDR 0xE06
+#define NFC_FLASH_CMD 0xE08
+#define NFC_CONFIG 0xE0A
+#define NFC_ECC_STATUS_RESULT 0xE0C
+#define NFC_RSLTMAIN_AREA 0xE0E
+#define NFC_RSLTSPARE_AREA 0xE10
+#define NFC_SPAS 0xe10
+#define NFC_WRPROT 0xE12
+#define NFC_V1_UNLOCKSTART_BLKADDR 0xe14
+#define NFC_V1_UNLOCKEND_BLKADDR 0xe16
+#define NFC_V21_UNLOCKSTART_BLKADDR 0xe20
+#define NFC_V21_UNLOCKEND_BLKADDR 0xe22
+#define NFC_NF_WRPRST 0xE18
+#define NFC_CONFIG1 0xE1A
+#define NFC_CONFIG2 0xE1C
+
+/*
+ * Addresses for NFC RAM BUFFER Main area 0
+ */
+#define MAIN_AREA0 0x000
+#define MAIN_AREA1 0x200
+#define MAIN_AREA2 0x400
+#define MAIN_AREA3 0x600
+
+/*
+ * Addresses for NFC SPARE BUFFER Spare area 0
+ */
+#define SPARE_AREA0 0x800
+#define SPARE_AREA1 0x810
+#define SPARE_AREA2 0x820
+#define SPARE_AREA3 0x830
+
+/*
+ * Set INT to 0, FCMD to 1, rest to 0 in NFC_CONFIG2 Register for Command
+ * operation
+ */
+#define NFC_CMD 0x1
+
+/*
+ * Set INT to 0, FADD to 1, rest to 0 in NFC_CONFIG2 Register for Address
+ * operation
+ */
+#define NFC_ADDR 0x2
+
+/*
+ * Set INT to 0, FDI to 1, rest to 0 in NFC_CONFIG2 Register for Input
+ * operation
+ */
+#define NFC_INPUT 0x4
+
+/*
+ * Set INT to 0, FDO to 001, rest to 0 in NFC_CONFIG2 Register for Data Output
+ * operation
+ */
+#define NFC_OUTPUT 0x8
+
+/*
+ * Set INT to 0, FD0 to 010, rest to 0 in NFC_CONFIG2 Register for Read ID
+ * operation
+ */
+#define NFC_ID 0x10
+
+/*
+ * Set INT to 0, FDO to 100, rest to 0 in NFC_CONFIG2 Register for Read Status
+ * operation
+ */
+#define NFC_STATUS 0x20
+
+/*
+ * Set INT to 1, rest to 0 in NFC_CONFIG2 Register for Read Status
+ * operation
+ */
+#define NFC_INT 0x8000
+
+#define NFC_ECC_MODE (1 << 0)
+#define NFC_SP_EN (1 << 2)
+#define NFC_ECC_EN (1 << 3)
+#define NFC_INT_MSK (1 << 4)
+#define NFC_BIG (1 << 5)
+#define NFC_RST (1 << 6)
+#define NFC_CE (1 << 7)
+#define NFC_ONE_CYCLE (1 << 8)
+
+#define NFC_SPAS_16 8
+#define NFC_SPAS_64 32
+#define NFC_SPAS_128 64
+#define NFC_SPAS_218 109
+
+#ifdef CONFIG_NAND_IMX_BOOT
+#define __nand_boot_init __bare_init
+#else
+#define __nand_boot_init
+#endif
+
+struct imx_nand_host {
+ struct mtd_info mtd;
+ struct nand_chip nand;
+ struct mtd_partition *parts;
+ struct device_d *dev;
+
+ void *spare0;
+ void *main_area0;
+ void *main_area1;
+
+ void __iomem *base;
+ void __iomem *regs;
+ int status_request;
+ struct clk *clk;
+
+ int pagesize_2k;
+ uint8_t *data_buf;
+ unsigned int buf_start;
+ int spare_len;
+
+};
+
+/*
+ * OOB placement block for use with hardware ecc generation
+ */
+static struct nand_ecclayout nandv1_hw_eccoob_smallpage = {
+ .eccbytes = 5,
+ .eccpos = {6, 7, 8, 9, 10},
+ .oobfree = {{0, 5}, {12, 4}}
+};
+
+static struct nand_ecclayout nandv1_hw_eccoob_largepage = {
+ .eccbytes = 20,
+ .eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26,
+ 38, 39, 40, 41, 42, 54, 55, 56, 57, 58},
+ .oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, }
+};
+
+/* OOB description for 512 byte pages with 16 byte OOB */
+static struct nand_ecclayout nandv2_hw_eccoob_smallpage = {
+ .eccbytes = 1 * 9,
+ .eccpos = {
+ 7, 8, 9, 10, 11, 12, 13, 14, 15
+ },
+ .oobfree = {
+ {.offset = 0, .length = 5}
+ }
+};
+
+/* OOB description for 2048 byte pages with 64 byte OOB */
+static struct nand_ecclayout nandv2_hw_eccoob_largepage = {
+ .eccbytes = 4 * 9,
+ .eccpos = {
+ 7, 8, 9, 10, 11, 12, 13, 14, 15,
+ 23, 24, 25, 26, 27, 28, 29, 30, 31,
+ 39, 40, 41, 42, 43, 44, 45, 46, 47,
+ 55, 56, 57, 58, 59, 60, 61, 62, 63
+ },
+ .oobfree = {
+ {.offset = 2, .length = 4},
+ {.offset = 16, .length = 7},
+ {.offset = 32, .length = 7},
+ {.offset = 48, .length = 7}
+ }
+};
+
+static void memcpy32(void *trg, const void *src, int size)
+{
+ int i;
+ unsigned int *t = trg;
+ unsigned const int *s = src;
+
+#ifdef CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS
+ if (!((unsigned long)trg & 0x3) && !((unsigned long)src & 0x3))
+ memcpy(trg, src, size);
+ else
+#endif
+ for (i = 0; i < (size >> 2); i++)
+ *t++ = *s++;
+}
+
+/*
+ * This function polls the NANDFC to wait for the basic operation to complete by
+ * checking the INT bit of config2 register.
+ *
+ * @param max_retries number of retry attempts (separated by 1 us)
+ * @param param parameter for debug
+ */
+static void __nand_boot_init wait_op_done(struct imx_nand_host *host)
+{
+ u32 tmp;
+ int i;
+
+ /* This is a timeout of roughly 15ms on my system. We
+ * need about 2us, but be generous. Don't use udelay
+ * here as we might be here from nand booting.
+ */
+ for (i = 0; i < 100000; i++) {
+ if (readw(host->regs + NFC_CONFIG2) & NFC_INT) {
+ tmp = readw(host->regs + NFC_CONFIG2);
+ tmp &= ~NFC_INT;
+ writew(tmp, host->regs + NFC_CONFIG2);
+ return;
+ }
+ }
+}
+
+/*
+ * This function issues the specified command to the NAND device and
+ * waits for completion.
+ *
+ * @param cmd command for NAND Flash
+ */
+static void __nand_boot_init send_cmd(struct imx_nand_host *host, u16 cmd)
+{
+ MTD_DEBUG(MTD_DEBUG_LEVEL3, "send_cmd(host, 0x%x)\n", cmd);
+
+ writew(cmd, host->regs + NFC_FLASH_CMD);
+ writew(NFC_CMD, host->regs + NFC_CONFIG2);
+
+ if (cpu_is_mx21() && (cmd == NAND_CMD_RESET)) {
+ /* Reset completion is indicated by NFC_CONFIG2 */
+ /* being set to 0 */
+ int i;
+ for (i = 0; i < 100000; i++) {
+ if (readw(host->regs + NFC_CONFIG2) == 0) {
+ break;
+ }
+ }
+ } else
+ /* Wait for operation to complete */
+ wait_op_done(host);
+}
+
+/*
+ * This function sends an address (or partial address) to the
+ * NAND device. The address is used to select the source/destination for
+ * a NAND command.
+ *
+ * @param addr address to be written to NFC.
+ * @param islast True if this is the last address cycle for command
+ */
+static void __nand_boot_init noinline send_addr(struct imx_nand_host *host, u16 addr)
+{
+ MTD_DEBUG(MTD_DEBUG_LEVEL3, "send_addr(host, 0x%x %d)\n", addr, islast);
+
+ writew(addr, host->regs + NFC_FLASH_ADDR);
+ writew(NFC_ADDR, host->regs + NFC_CONFIG2);
+
+ /* Wait for operation to complete */
+ wait_op_done(host);
+}
+
+/*
+ * This function requests the NANDFC to initate the transfer
+ * of data currently in the NANDFC RAM buffer to the NAND device.
+ *
+ * @param buf_id Specify Internal RAM Buffer number (0-3)
+ * @param spare_only set true if only the spare area is transferred
+ */
+static void __nand_boot_init send_page(struct imx_nand_host *host,
+ unsigned int ops)
+{
+ int bufs, i;
+
+ if (nfc_is_v1() && host->pagesize_2k)
+ bufs = 4;
+ else
+ bufs = 1;
+
+ for (i = 0; i < bufs; i++) {
+ /* NANDFC buffer 0 is used for page read/write */
+ writew(i, host->regs + NFC_BUF_ADDR);
+
+ writew(ops, host->regs + NFC_CONFIG2);
+
+ /* Wait for operation to complete */
+ wait_op_done(host);
+ }
+}
+
+/*
+ * This function requests the NANDFC to perform a read of the
+ * NAND device ID.
+ */
+static void send_read_id(struct imx_nand_host *host)
+{
+ struct nand_chip *this = &host->nand;
+ u16 tmp;
+
+ /* NANDFC buffer 0 is used for device ID output */
+ writew(0x0, host->regs + NFC_BUF_ADDR);
+
+ /* Read ID into main buffer */
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp &= ~NFC_SP_EN;
+ writew(tmp, host->regs + NFC_CONFIG1);
+
+ writew(NFC_ID, host->regs + NFC_CONFIG2);
+
+ /* Wait for operation to complete */
+ wait_op_done(host);
+
+ if (this->options & NAND_BUSWIDTH_16) {
+ volatile u16 *mainbuf = host->main_area0;
+
+ /*
+ * Pack the every-other-byte result for 16-bit ID reads
+ * into every-byte as the generic code expects and various
+ * chips implement.
+ */
+
+ mainbuf[0] = (mainbuf[0] & 0xff) | ((mainbuf[1] & 0xff) << 8);
+ mainbuf[1] = (mainbuf[2] & 0xff) | ((mainbuf[3] & 0xff) << 8);
+ mainbuf[2] = (mainbuf[4] & 0xff) | ((mainbuf[5] & 0xff) << 8);
+ }
+ memcpy32(host->data_buf, host->main_area0, 16);
+}
+
+/*
+ * This function requests the NANDFC to perform a read of the
+ * NAND device status and returns the current status.
+ *
+ * @return device status
+ */
+static u16 get_dev_status(struct imx_nand_host *host)
+{
+ volatile u16 *mainbuf = host->main_area1;
+ u32 store;
+ u16 ret, tmp;
+ /* Issue status request to NAND device */
+
+ /* store the main area1 first word, later do recovery */
+ store = *((u32 *) mainbuf);
+ /*
+ * NANDFC buffer 1 is used for device status to prevent
+ * corruption of read/write buffer on status requests.
+ */
+ writew(1, host->regs + NFC_BUF_ADDR);
+
+ /* Read status into main buffer */
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp &= ~NFC_SP_EN;
+ writew(tmp, host->regs + NFC_CONFIG1);
+
+ writew(NFC_STATUS, host->regs + NFC_CONFIG2);
+
+ /* Wait for operation to complete */
+ wait_op_done(host);
+
+ /* Status is placed in first word of main buffer */
+ /* get status, then recovery area 1 data */
+ ret = mainbuf[0];
+ *((u32 *) mainbuf) = store;
+
+ return ret;
+}
+
+/*
+ * This function is used by upper layer to checks if device is ready
+ *
+ * @param mtd MTD structure for the NAND Flash
+ *
+ * @return 0 if device is busy else 1
+ */
+static int imx_nand_dev_ready(struct mtd_info *mtd)
+{
+ /*
+ * NFC handles R/B internally.Therefore,this function
+ * always returns status as ready.
+ */
+ return 1;
+}
+
+static void imx_nand_enable_hwecc(struct mtd_info *mtd, int mode)
+{
+ /*
+ * If HW ECC is enabled, we turn it on during init. There is
+ * no need to enable again here.
+ */
+}
+
+static int imx_nand_correct_data(struct mtd_info *mtd, u_char * dat,
+ u_char * read_ecc, u_char * calc_ecc)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct imx_nand_host *host = nand_chip->priv;
+
+ /*
+ * 1-Bit errors are automatically corrected in HW. No need for
+ * additional correction. 2-Bit errors cannot be corrected by
+ * HW ECC, so we need to return failure
+ */
+ u16 ecc_status = readw(host->regs + NFC_ECC_STATUS_RESULT);
+
+ if (((ecc_status & 0x3) == 2) || ((ecc_status >> 2) == 2)) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0,
+ "MXC_NAND: HWECC uncorrectable 2-bit ECC error\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int imx_nand_calculate_ecc(struct mtd_info *mtd, const u_char * dat,
+ u_char * ecc_code)
+{
+ return 0;
+}
+
+/*
+ * This function reads byte from the NAND Flash
+ *
+ * @param mtd MTD structure for the NAND Flash
+ *
+ * @return data read from the NAND Flash
+ */
+static u_char imx_nand_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct imx_nand_host *host = nand_chip->priv;
+ u_char ret;
+
+ /* Check for status request */
+ if (host->status_request)
+ return get_dev_status(host) & 0xFF;
+
+ ret = *(uint8_t *)(host->data_buf + host->buf_start);
+ host->buf_start++;
+
+ return ret;
+}
+
+/*
+ * This function reads word from the NAND Flash
+ *
+ * @param mtd MTD structure for the NAND Flash
+ *
+ * @return data read from the NAND Flash
+ */
+static u16 imx_nand_read_word(struct mtd_info *mtd)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct imx_nand_host *host = nand_chip->priv;
+ uint16_t ret;
+
+ ret = *(uint16_t *)(host->data_buf + host->buf_start);
+ host->buf_start += 2;
+
+ return ret;
+}
+
+/*
+ * This function writes data of length \b len to buffer \b buf. The data to be
+ * written on NAND Flash is first copied to RAMbuffer. After the Data Input
+ * Operation by the NFC, the data is written to NAND Flash
+ *
+ * @param mtd MTD structure for the NAND Flash
+ * @param buf data to be written to NAND Flash
+ * @param len number of bytes to be written
+ */
+static void imx_nand_write_buf(struct mtd_info *mtd,
+ const u_char *buf, int len)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct imx_nand_host *host = nand_chip->priv;
+ u16 col = host->buf_start;
+ int n = mtd->oobsize + mtd->writesize - col;
+
+ n = min(n, len);
+ memcpy(host->data_buf + col, buf, n);
+
+ host->buf_start += n;
+}
+
+/*
+ * This function is used to read the data buffer from the NAND Flash. To
+ * read the data from NAND Flash first the data output cycle is initiated by
+ * the NFC, which copies the data to RAMbuffer. This data of length \b len is
+ * then copied to buffer \b buf.
+ *
+ * @param mtd MTD structure for the NAND Flash
+ * @param buf data to be read from NAND Flash
+ * @param len number of bytes to be read
+ */
+static void imx_nand_read_buf(struct mtd_info *mtd, u_char * buf, int len)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct imx_nand_host *host = nand_chip->priv;
+ u16 col = host->buf_start;
+ int n = mtd->oobsize + mtd->writesize - col;
+
+ n = min(n, len);
+
+ memcpy(buf, host->data_buf + col, len);
+
+ host->buf_start += len;
+}
+
+/*
+ * Function to transfer data to/from spare area.
+ */
+static void copy_spare(struct mtd_info *mtd, int bfrom)
+{
+ struct nand_chip *this = mtd->priv;
+ struct imx_nand_host *host = this->priv;
+ u16 i, j;
+ u16 n = mtd->writesize >> 9;
+ u8 *d = host->data_buf + mtd->writesize;
+ u8 *s = host->spare0;
+ u16 t = host->spare_len;
+
+ j = (mtd->oobsize / n >> 1) << 1;
+
+ if (bfrom) {
+ for (i = 0; i < n - 1; i++)
+ memcpy32(d + i * j, s + i * t, j);
+
+ /* the last section */
+ memcpy32(d + i * j, s + i * t, mtd->oobsize - i * j);
+ } else {
+ for (i = 0; i < n - 1; i++)
+ memcpy32(&s[i * t], &d[i * j], j);
+
+ /* the last section */
+ memcpy32(&s[i * t], &d[i * j], mtd->oobsize - i * j);
+ }
+}
+
+/*
+ * This function is used by the upper layer to verify the data in NAND Flash
+ * with the data in the \b buf.
+ *
+ * @param mtd MTD structure for the NAND Flash
+ * @param buf data to be verified
+ * @param len length of the data to be verified
+ *
+ * @return -EFAULT if error else 0
+ *
+ */
+static int
+imx_nand_verify_buf(struct mtd_info *mtd, const u_char * buf, int len)
+{
+ return -EFAULT;
+}
+
+/*
+ * This function is used by upper layer for select and deselect of the NAND
+ * chip
+ *
+ * @param mtd MTD structure for the NAND Flash
+ * @param chip val indicating select or deselect
+ */
+static void imx_nand_select_chip(struct mtd_info *mtd, int chip)
+{
+#ifdef CONFIG_MTD_NAND_MXC_FORCE_CE
+ u16 tmp;
+
+ if (chip > 0) {
+ MTD_DEBUG(MTD_DEBUG_LEVEL0,
+ "ERROR: Illegal chip select (chip = %d)\n", chip);
+ return;
+ }
+
+ if (chip == -1) {
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp &= ~NFC_CE;
+ writew(tmp, host->regs + NFC_CONFIG1);
+ return;
+ }
+
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp |= NFC_CE;
+ writew(tmp, host->regs + NFC_CONFIG1);
+#endif
+}
+
+static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct imx_nand_host *host = nand_chip->priv;
+
+ /*
+ * Write out column address, if necessary
+ */
+ if (column != -1) {
+ /*
+ * MXC NANDFC can only perform full page+spare or
+ * spare-only read/write. When the upper layers
+ * layers perform a read/write buf operation,
+ * we will used the saved column adress to index into
+ * the full page.
+ */
+ send_addr(host, 0);
+ if (host->pagesize_2k)
+ /* another col addr cycle for 2k page */
+ send_addr(host, 0);
+ }
+
+ /*
+ * Write out page address, if necessary
+ */
+ if (page_addr != -1) {
+ send_addr(host, (page_addr & 0xff)); /* paddr_0 - p_addr_7 */
+
+ if (host->pagesize_2k) {
+ send_addr(host, (page_addr >> 8) & 0xFF);
+ if (mtd->size >= 0x10000000) {
+ send_addr(host, (page_addr >> 16) & 0xff);
+ }
+ } else {
+ /* One more address cycle for higher density devices */
+ if (mtd->size >= 0x4000000) {
+ /* paddr_8 - paddr_15 */
+ send_addr(host, (page_addr >> 8) & 0xff);
+ send_addr(host, (page_addr >> 16) & 0xff);
+ } else
+ /* paddr_8 - paddr_15 */
+ send_addr(host, (page_addr >> 8) & 0xff);
+ }
+ }
+}
+
+/*
+ * This function is used by the upper layer to write command to NAND Flash for
+ * different operations to be carried out on NAND Flash
+ *
+ * @param mtd MTD structure for the NAND Flash
+ * @param command command for NAND Flash
+ * @param column column offset for the page read
+ * @param page_addr page to be read from NAND Flash
+ */
+static void imx_nand_command(struct mtd_info *mtd, unsigned command,
+ int column, int page_addr)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct imx_nand_host *host = nand_chip->priv;
+
+ MTD_DEBUG(MTD_DEBUG_LEVEL3,
+ "imx_nand_command (cmd = 0x%x, col = 0x%x, page = 0x%x)\n",
+ command, column, page_addr);
+
+ /*
+ * Reset command state information
+ */
+ host->status_request = 0;
+
+ /*
+ * Command pre-processing step
+ */
+ switch (command) {
+
+ case NAND_CMD_STATUS:
+ host->buf_start = 0;
+ host->status_request = 1;
+ send_cmd(host, command);
+ mxc_do_addr_cycle(mtd, column, page_addr);
+ break;
+
+ case NAND_CMD_READ0:
+ case NAND_CMD_READOOB:
+ if (command == NAND_CMD_READ0)
+ host->buf_start = column;
+ else
+ host->buf_start = column + mtd->writesize;
+
+ command = NAND_CMD_READ0;
+
+ send_cmd(host, command);
+ mxc_do_addr_cycle(mtd, column, page_addr);
+
+ if (host->pagesize_2k)
+ /* send read confirm command */
+ send_cmd(host, NAND_CMD_READSTART);
+
+ send_page(host, NFC_OUTPUT);
+
+ memcpy32(host->data_buf, host->main_area0, mtd->writesize);
+ copy_spare(mtd, 1);
+ break;
+
+ case NAND_CMD_SEQIN:
+ if (column >= mtd->writesize) {
+ if (host->pagesize_2k) {
+ /**
+ * FIXME: before send SEQIN command for write
+ * OOB, we must read one page out. For K9F1GXX
+ * has no READ1 command to set current HW
+ * pointer to spare area, we must write the
+ * whole page including OOB together.
+ */
+ /* call ourself to read a page */
+ imx_nand_command(mtd, NAND_CMD_READ0, 0,
+ page_addr);
+ }
+ host->buf_start = column;
+
+ /* Set program pointer to spare region */
+ if (!host->pagesize_2k)
+ send_cmd(host, NAND_CMD_READOOB);
+ } else {
+ host->buf_start = column;
+
+ /* Set program pointer to page start */
+ if (!host->pagesize_2k)
+ send_cmd(host, NAND_CMD_READ0);
+ }
+ send_cmd(host, command);
+ mxc_do_addr_cycle(mtd, column, page_addr);
+
+ break;
+
+ case NAND_CMD_PAGEPROG:
+ memcpy32(host->main_area0, host->data_buf, mtd->writesize);
+ copy_spare(mtd, 0);
+ send_page(host, NFC_INPUT);
+ send_cmd(host, command);
+ mxc_do_addr_cycle(mtd, column, page_addr);
+ break;
+
+ case NAND_CMD_READID:
+ send_cmd(host, command);
+ mxc_do_addr_cycle(mtd, column, page_addr);
+ host->buf_start = 0;
+ send_read_id(host);
+ break;
+
+ case NAND_CMD_ERASE1:
+ case NAND_CMD_ERASE2:
+ case NAND_CMD_RESET:
+ send_cmd(host, command);
+ mxc_do_addr_cycle(mtd, column, page_addr);
+ break;
+ }
+}
+
+#ifdef CONFIG_MXC_NAND_LOW_LEVEL_ERASE
+static void imx_low_erase(struct mtd_info *mtd)
+{
+
+ struct nand_chip *this = mtd->priv;
+ unsigned int page_addr, addr;
+ u_char status;
+
+ MTD_DEBUG(MTD_DEBUG_LEVEL0, "MXC_ND : imx_low_erase:Erasing NAND\n");
+ for (addr = 0; addr < this->chipsize; addr += mtd->erasesize) {
+ page_addr = addr / mtd->writesize;
+ imx_nand_command(mtd, NAND_CMD_ERASE1, -1, page_addr);
+ imx_nand_command(mtd, NAND_CMD_ERASE2, -1, -1);
+ imx_nand_command(mtd, NAND_CMD_STATUS, -1, -1);
+ status = imx_nand_read_byte(mtd);
+ if (status & NAND_STATUS_FAIL) {
+ printk(KERN_ERR
+ "ERASE FAILED(block = %d,status = 0x%x)\n",
+ addr / mtd->erasesize, status);
+ }
+ }
+
+}
+#endif
+
+/*
+ * The generic flash bbt decriptors overlap with our ecc
+ * hardware, so define some i.MX specific ones.
+ */
+static uint8_t bbt_pattern[] = { 'B', 'b', 't', '0' };
+static uint8_t mirror_pattern[] = { '1', 't', 'b', 'B' };
+
+static struct nand_bbt_descr bbt_main_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+ .offs = 0,
+ .len = 4,
+ .veroffs = 4,
+ .maxblocks = 4,
+ .pattern = bbt_pattern,
+};
+
+static struct nand_bbt_descr bbt_mirror_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+ .offs = 0,
+ .len = 4,
+ .veroffs = 4,
+ .maxblocks = 4,
+ .pattern = mirror_pattern,
+};
+
+/*
+ * This function is called during the driver binding process.
+ *
+ * @param pdev the device structure used to store device specific
+ * information that is used by the suspend, resume and
+ * remove functions
+ *
+ * @return The function always returns 0.
+ */
+
+static int __init imxnd_probe(struct device_d *dev)
+{
+ struct nand_chip *this;
+ struct mtd_info *mtd;
+ struct imx_nand_platform_data *pdata = dev->platform_data;
+ struct imx_nand_host *host;
+ struct nand_ecclayout *oob_smallpage, *oob_largepage;
+ u16 tmp;
+ int err = 0;
+
+#ifdef CONFIG_ARCH_IMX27
+ PCCR1 |= PCCR1_NFC_BAUDEN;
+#endif
+#ifdef CONFIG_ARCH_IMX21
+ PCCR0 |= PCCR0_NFC_EN;
+#endif
+ /* Allocate memory for MTD device structure and private data */
+ host = kzalloc(sizeof(struct imx_nand_host) + NAND_MAX_PAGESIZE +
+ NAND_MAX_OOBSIZE, GFP_KERNEL);
+ if (!host)
+ return -ENOMEM;
+
+ host->data_buf = (uint8_t *)(host + 1);
+ host->base = (void __iomem *)dev->map_base;
+
+ host->main_area0 = host->base;
+ host->main_area1 = host->base + 0x200;
+
+ if (nfc_is_v21()) {
+ host->regs = host->base + 0x1000;
+ host->spare0 = host->base + 0x1000;
+ host->spare_len = 64;
+ oob_smallpage = &nandv2_hw_eccoob_smallpage;
+ oob_largepage = &nandv2_hw_eccoob_largepage;
+ } else if (nfc_is_v1()) {
+ host->regs = host->base;
+ host->spare0 = host->base + 0x800;
+ host->spare_len = 16;
+ oob_smallpage = &nandv1_hw_eccoob_smallpage;
+ oob_largepage = &nandv1_hw_eccoob_largepage;
+ }
+
+ host->dev = dev;
+ /* structures must be linked */
+ this = &host->nand;
+ mtd = &host->mtd;
+ mtd->priv = this;
+
+ /* 50 us command delay time */
+ this->chip_delay = 5;
+
+ this->priv = host;
+ this->dev_ready = imx_nand_dev_ready;
+ this->cmdfunc = imx_nand_command;
+ this->select_chip = imx_nand_select_chip;
+ this->read_byte = imx_nand_read_byte;
+ this->read_word = imx_nand_read_word;
+ this->write_buf = imx_nand_write_buf;
+ this->read_buf = imx_nand_read_buf;
+ this->verify_buf = imx_nand_verify_buf;
+#if 0
+ host->clk = clk_get(&pdev->dev, "nfc_clk");
+ if (IS_ERR(host->clk))
+ goto eclk;
+
+ clk_enable(host->clk);
+#endif
+
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp |= NFC_INT_MSK;
+ tmp &= ~NFC_SP_EN;
+ if (nfc_is_v21())
+ /* currently no support for 218 byte OOB with stronger ECC */
+ tmp |= NFC_ECC_MODE;
+ writew(tmp, host->regs + NFC_CONFIG1);
+
+ if (pdata->hw_ecc) {
+ this->ecc.calculate = imx_nand_calculate_ecc;
+ this->ecc.hwctl = imx_nand_enable_hwecc;
+ this->ecc.correct = imx_nand_correct_data;
+ this->ecc.mode = NAND_ECC_HW;
+ this->ecc.size = 512;
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp |= NFC_ECC_EN;
+ writew(tmp, host->regs + NFC_CONFIG1);
+ } else {
+ this->ecc.size = 512;
+ this->ecc.mode = NAND_ECC_SOFT;
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp &= ~NFC_ECC_EN;
+ writew(tmp, host->regs + NFC_CONFIG1);
+ }
+
+ /* Reset NAND */
+ this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+
+ /* preset operation */
+ /* Unlock the internal RAM Buffer */
+ writew(0x2, host->regs + NFC_CONFIG);
+
+ /* Blocks to be unlocked */
+ if (nfc_is_v21()) {
+ writew(0x0, host->regs + NFC_V21_UNLOCKSTART_BLKADDR);
+ writew(0xffff, host->regs + NFC_V21_UNLOCKEND_BLKADDR);
+ this->ecc.bytes = 9;
+ } else if (nfc_is_v1()) {
+ writew(0x0, host->regs + NFC_V1_UNLOCKSTART_BLKADDR);
+ writew(0x4000, host->regs + NFC_V1_UNLOCKEND_BLKADDR);
+ this->ecc.bytes = 3;
+ }
+
+ /* Unlock Block Command for given address range */
+ writew(0x4, host->regs + NFC_WRPROT);
+
+ this->ecc.layout = oob_smallpage;
+
+ /* NAND bus width determines access funtions used by upper layer */
+ if (pdata->width == 2) {
+ this->options |= NAND_BUSWIDTH_16;
+ this->ecc.layout = &nandv1_hw_eccoob_smallpage;
+ imx_nand_set_layout(0, 16);
+ }
+
+ if (pdata->flash_bbt) {
+ this->bbt_td = &bbt_main_descr;
+ this->bbt_md = &bbt_mirror_descr;
+ /* update flash based bbt */
+ this->options |= NAND_USE_FLASH_BBT;
+ }
+
+ /* first scan to find the device and get the page size */
+ if (nand_scan_ident(mtd, 1)) {
+ err = -ENXIO;
+ goto escan;
+ }
+
+ imx_nand_set_layout(mtd->writesize, pdata->width == 2 ? 16 : 8);
+
+ if (mtd->writesize == 2048) {
+ this->ecc.layout = oob_largepage;
+ host->pagesize_2k = 1;
+ if (nfc_is_v21()) {
+ tmp = readw(host->regs + NFC_SPAS);
+ tmp &= 0xff00;
+ tmp |= NFC_SPAS_64;
+ writew(tmp, host->regs + NFC_SPAS);
+ }
+ } else {
+ if (nfc_is_v21()) {
+ tmp = readw(host->regs + NFC_SPAS);
+ tmp &= 0xff00;
+ tmp |= NFC_SPAS_16;
+ writew(tmp, host->regs + NFC_SPAS);
+ }
+ }
+
+ /* second phase scan */
+ if (nand_scan_tail(mtd)) {
+ err = -ENXIO;
+ goto escan;
+ }
+
+ add_mtd_device(mtd);
+
+ dev->priv = host;
+
+ return 0;
+
+escan:
+ kfree(host);
+
+ return err;
+
+}
+
+static struct driver_d imx_nand_driver = {
+ .name = "imx_nand",
+ .probe = imxnd_probe,
+};
+
+#ifdef CONFIG_NAND_IMX_BOOT
+
+static void __nand_boot_init nfc_addr(struct imx_nand_host *host, u32 offs)
+{
+ if (host->pagesize_2k) {
+ send_addr(host, offs & 0xff);
+ send_addr(host, offs & 0xff);
+ send_addr(host, (offs >> 11) & 0xff);
+ send_addr(host, (offs >> 19) & 0xff);
+ send_addr(host, (offs >> 27) & 0xff);
+ } else {
+ send_addr(host, offs & 0xff);
+ send_addr(host, (offs >> 9) & 0xff);
+ send_addr(host, (offs >> 17) & 0xff);
+ send_addr(host, (offs >> 25) & 0xff);
+ }
+}
+
+static void __nand_boot_init __memcpy32(void *trg, const void *src, int size)
+{
+ int i;
+ unsigned int *t = trg;
+ unsigned const int *s = src;
+
+ for (i = 0; i < (size >> 2); i++)
+ *t++ = *s++;
+}
+
+void __nand_boot_init imx_nand_load_image(void *dest, int size)
+{
+ struct imx_nand_host host;
+ u32 tmp, page, block, blocksize, pagesize;
+#ifdef CONFIG_ARCH_IMX21
+ tmp = readl(IMX_SYSTEM_CTL_BASE + 0x14);
+ if (tmp & (1 << 5))
+ host.pagesize_2k = 1;
+ else
+ host.pagesize_2k = 0;
+#endif
+#ifdef CONFIG_ARCH_IMX27
+ tmp = readl(IMX_SYSTEM_CTL_BASE + 0x14);
+ if (tmp & (1 << 5))
+ host.pagesize_2k = 1;
+ else
+ host.pagesize_2k = 0;
+#endif
+#ifdef CONFIG_ARCH_IMX31
+ tmp = readl(IMX_CCM_BASE + CCM_RCSR);
+ if (tmp & RCSR_NFMS)
+ host.pagesize_2k = 1;
+ else
+ host.pagesize_2k = 0;
+#endif
+#ifdef CONFIG_ARCH_IMX35
+ if (readl(IMX_CCM_BASE + CCM_RCSR) & (1 << 8))
+ host.pagesize_2k = 1;
+ else
+ host.pagesize_2k = 0;
+#endif
+ if (host.pagesize_2k) {
+ pagesize = 2048;
+ blocksize = 128 * 1024;
+ } else {
+ pagesize = 512;
+ blocksize = 16 * 1024;
+ }
+
+ host.base = (void __iomem *)IMX_NFC_BASE;
+ if (nfc_is_v21()) {
+ host.regs = host.base + 0x1000;
+ host.spare0 = host.base + 0x1000;
+ host.spare_len = 64;
+ } else if (nfc_is_v1()) {
+ host.regs = host.base;
+ host.spare0 = host.base + 0x800;
+ host.spare_len = 16;
+ }
+
+ send_cmd(&host, NAND_CMD_RESET);
+
+ /* preset operation */
+ /* Unlock the internal RAM Buffer */
+ writew(0x2, host.regs + NFC_CONFIG);
+
+ /* Unlock Block Command for given address range */
+ writew(0x4, host.regs + NFC_WRPROT);
+
+ tmp = readw(host.regs + NFC_CONFIG1);
+ tmp |= NFC_ECC_EN;
+ if (nfc_is_v21())
+ /* currently no support for 218 byte OOB with stronger ECC */
+ tmp |= NFC_ECC_MODE;
+ tmp &= ~(NFC_SP_EN | NFC_INT_MSK);
+ writew(tmp, host.regs + NFC_CONFIG1);
+
+ if (nfc_is_v21()) {
+ if (host.pagesize_2k) {
+ tmp = readw(host.regs + NFC_SPAS);
+ tmp &= 0xff00;
+ tmp |= NFC_SPAS_64;
+ writew(tmp, host.regs + NFC_SPAS);
+ } else {
+ tmp = readw(host.regs + NFC_SPAS);
+ tmp &= 0xff00;
+ tmp |= NFC_SPAS_16;
+ writew(tmp, host.regs + NFC_SPAS);
+ }
+ }
+
+ block = page = 0;
+
+ while (1) {
+ page = 0;
+ while (page * pagesize < blocksize) {
+ debug("page: %d block: %d dest: %p src "
+ "0x%08x\n",
+ page, block, dest,
+ block * blocksize +
+ page * pagesize);
+
+ send_cmd(&host, NAND_CMD_READ0);
+ nfc_addr(&host, block * blocksize +
+ page * pagesize);
+ if (host.pagesize_2k)
+ send_cmd(&host, NAND_CMD_READSTART);
+ send_page(&host, NFC_OUTPUT);
+ page++;
+
+ if (host.pagesize_2k) {
+ if ((readw(host.spare0) & 0xff)
+ != 0xff)
+ continue;
+ } else {
+ if ((readw(host.spare0 + 4) & 0xff00)
+ != 0xff00)
+ continue;
+ }
+
+ __memcpy32(dest, host.base, pagesize);
+ dest += pagesize;
+ size -= pagesize;
+
+ if (size <= 0)
+ return;
+ }
+ block++;
+ }
+}
+#define CONFIG_NAND_IMX_BOOT_DEBUG
+#ifdef CONFIG_NAND_IMX_BOOT_DEBUG
+#include <command.h>
+
+static int do_nand_boot_test(struct command *cmdtp, int argc, char *argv[])
+{
+ void *dest;
+ int size;
+
+ if (argc < 3)
+ return COMMAND_ERROR_USAGE;
+
+ dest = (void *)strtoul_suffix(argv[1], NULL, 0);
+ size = strtoul_suffix(argv[2], NULL, 0);
+
+ imx_nand_load_image(dest, size);
+
+ return 0;
+}
+
+static const __maybe_unused char cmd_nand_boot_test_help[] =
+"Usage: nand_boot_test <dest> <size>\n"
+"This command loads the booloader from the NAND memory like the reset\n"
+"routine does. Its intended for development tests only";
+
+BAREBOX_CMD_START(nand_boot_test)
+ .cmd = do_nand_boot_test,
+ .usage = "load bootloader from NAND",
+ BAREBOX_CMD_HELP(cmd_nand_boot_test_help)
+BAREBOX_CMD_END
+#endif
+
+#endif /* CONFIG_NAND_IMX_BOOT */
+
+/*
+ * Main initialization routine
+ * @return 0 if successful; non-zero otherwise
+ */
+static int __init imx_nand_init(void)
+{
+ return register_driver(&imx_nand_driver);
+}
+
+device_initcall(imx_nand_init);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("MXC NAND MTD driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mtd/nand/nand_omap_gpmc.c b/drivers/mtd/nand/nand_omap_gpmc.c
new file mode 100644
index 0000000..c6647e5
--- /dev/null
+++ b/drivers/mtd/nand/nand_omap_gpmc.c
@@ -0,0 +1,534 @@
+/**
+ * @file
+ * @brief Provide Generic GPMC NAND implementation for OMAP platforms
+ *
+ * FileName: arch/arm/mach-omap/gpmc_nand.c
+ *
+ * GPMC has a NAND controller inbuilt. This provides a generic implementation
+ * for board files to register a nand device. drivers/nand/nand_base.c takes
+ * care of identifing the type of device, size etc.
+ *
+ * A typical device registration is as follows:
+ *
+ * @code
+ * static struct device_d my_nand_device = {
+ * .name = "gpmc_nand",
+ * .id = some identifier you need to show.. e.g. "gpmc_nand0"
+ * .map_base = GPMC base address
+ * .size = GPMC address map size.
+ * .platform_data = platform data - required - explained below
+ * };
+ * platform data required:
+ * static struct gpmc_nand_platform_data nand_plat = {
+ * .cs = give the chip select of the device
+ * .device_width = what is the width of the device 8 or 16?
+ * .max_timeout = delay desired for operation
+ * .wait_mon_pin = do you use wait monitoring? if so wait pin
+ * .plat_options = platform options.
+ * NAND_HWECC_ENABLE/DISABLE - hw ecc enable/disable
+ * NAND_WAITPOL_LOW/HIGH - wait pin polarity
+ * .oob = if you would like to replace oob with a custom OOB.
+ * .nand_setup = if you would like a special setup function to be called
+ * .priv = any params you'd like to save(e.g. like nand_setup to use)
+ *};
+ * then in your code, you'd device_register(&my_nand_device);
+ * @endcode
+ *
+ * Note:
+ * @li Enable CONFIG_NAND_OMAP_GPMC_HWECC in menuconfig to get H/w ECC support
+ * @li You may choose to register two "devices" for the same CS to get BOTH
+ * hwecc and swecc devices.
+ * @li You can choose to have your own OOB definition for compliance with ROM
+ * code organization - only if you dont want to use NAND's default oob layout.
+ * see GPMC_NAND_ECC_LP_x8_LAYOUT etc..
+ *
+ * @see gpmc_nand_platform_data
+ * @warning Remember to initialize GPMC before initializing the nand dev.
+ */
+/*
+ * (C) Copyright 2008
+ * Texas Instruments, <www.ti.com>
+ * Nishanth Menon <x0nishan@ti.com>
+ *
+ * Based on:
+ * drivers/mtd/nand/omap2.c from linux kernel
+ *
+ * Copyright (c) 2004 Texas Instruments, Jian Zhang <jzhang@ti.com>
+ * Copyright (c) 2004 Micron Technology Inc.
+ * Copyright (c) 2004 David Brownell
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <init.h>
+#include <driver.h>
+#include <malloc.h>
+#include <clock.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/nand_ecc.h>
+#include <asm/io.h>
+#include <mach/silicon.h>
+#include <mach/gpmc.h>
+#include <mach/gpmc_nand.h>
+
+/* Enable me to get tons of debug messages -for use without jtag */
+#if 0
+#define gpmcnand_dbg(FORMAT, ARGS...) fprintf(stdout,\
+ "gpmc_nand:%s:%d:Entry:"FORMAT"\n",\
+ __func__, __LINE__, ARGS)
+#else
+#define gpmcnand_dbg(FORMAT, ARGS...)
+#endif
+#define gpmcnand_err(ARGS...) fprintf(stderr, "omapnand: " ARGS);
+
+/** internal structure maintained for nand information */
+struct gpmc_nand_info {
+ struct nand_hw_control controller;
+ struct device_d *pdev;
+ struct gpmc_nand_platform_data *pdata;
+ struct nand_chip nand;
+ struct mtd_info minfo;
+ int gpmc_cs;
+ void *gpmc_command;
+ void *gpmc_address;
+ void *gpmc_data;
+ unsigned long gpmc_base;
+ unsigned char wait_mon_mask;
+ uint64_t timeout;
+ unsigned inuse:1;
+ unsigned wait_pol:1;
+#ifdef CONFIG_NAND_OMAP_GPMC_HWECC
+ unsigned char ecc_parity_pairs;
+ unsigned int ecc_config;
+#endif
+};
+
+/**
+ * @brief calls the platform specific dev_ready functionds
+ *
+ * @param mtd - mtd info structure
+ *
+ * @return
+ */
+static int omap_dev_ready(struct mtd_info *mtd)
+{
+ struct nand_chip *nand = (struct nand_chip *)(mtd->priv);
+ struct gpmc_nand_info *oinfo = (struct gpmc_nand_info *)(nand->priv);
+ uint64_t start = get_time_ns();
+ unsigned long comp;
+
+ gpmcnand_dbg("mtd=%x", (unsigned int)mtd);
+ /* What do we mean by assert and de-assert? */
+ comp = (oinfo->wait_pol == NAND_WAITPOL_HIGH) ?
+ oinfo->wait_mon_mask : 0x0;
+ while (1) {
+ /* Breakout condition */
+ if (is_timeout(start, oinfo->timeout)) {
+ gpmcnand_err("timedout\n");
+ return -ETIMEDOUT;
+ }
+ /* if the wait is released, we are good to go */
+ if (comp ==
+ (readl(oinfo->gpmc_base + GPMC_STATUS) &&
+ oinfo->wait_mon_mask))
+ break;
+ }
+ return 0;
+}
+
+/**
+ * @brief This function will enable or disable the Write Protect feature on
+ * NAND device. GPMC has a single WP bit for all CS devices..
+ *
+ * @param oinfo omap nand info
+ * @param mode 0-disable else enable
+ *
+ * @return none
+ */
+static void gpmc_nand_wp(struct gpmc_nand_info *oinfo, int mode)
+{
+ unsigned long config = readl(oinfo->gpmc_base + GPMC_CFG);
+
+ gpmcnand_dbg("mode=%x", mode);
+ if (mode)
+ config &= ~(NAND_WP_BIT); /* WP is ON */
+ else
+ config |= (NAND_WP_BIT); /* WP is OFF */
+
+ writel(config, oinfo->gpmc_base + GPMC_CFG);
+}
+
+/**
+ * @brief respond to hw event change request
+ *
+ * MTD layer uses NAND_CTRL_CLE etc to control selection of the latch
+ * we hoodwink by changing the R and W registers according to the state
+ * we are requested.
+ *
+ * @param mtd - mtd info structure
+ * @param cmd command mtd layer is requesting
+ *
+ * @return none
+ */
+static void omap_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+{
+ struct nand_chip *nand = (struct nand_chip *)(mtd->priv);
+ struct gpmc_nand_info *oinfo = (struct gpmc_nand_info *)(nand->priv);
+ gpmcnand_dbg("mtd=%x nand=%x cmd=%x ctrl = %x", (unsigned int)mtd, nand,
+ cmd, ctrl);
+ switch (ctrl) {
+ case NAND_CTRL_CHANGE | NAND_CTRL_CLE:
+ nand->IO_ADDR_W = oinfo->gpmc_command;
+ nand->IO_ADDR_R = oinfo->gpmc_data;
+ break;
+
+ case NAND_CTRL_CHANGE | NAND_CTRL_ALE:
+ nand->IO_ADDR_W = oinfo->gpmc_address;
+ nand->IO_ADDR_R = oinfo->gpmc_data;
+ break;
+
+ case NAND_CTRL_CHANGE | NAND_NCE:
+ nand->IO_ADDR_W = oinfo->gpmc_data;
+ nand->IO_ADDR_R = oinfo->gpmc_data;
+ break;
+ }
+
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, nand->IO_ADDR_W);
+ return;
+}
+
+#ifdef CONFIG_NAND_OMAP_GPMC_HWECC
+
+/**
+ * @brief This function will generate true ECC value, which can be used
+ * when correcting data read from NAND flash memory core
+ *
+ * @param ecc_buf buffer to store ecc code
+ *
+ * @return re-formatted ECC value
+ */
+static unsigned int gen_true_ecc(u8 *ecc_buf)
+{
+ gpmcnand_dbg("ecc_buf=%x 1, 2 3 = %x %x %x", (unsigned int)ecc_buf,
+ ecc_buf[0], ecc_buf[1], ecc_buf[2]);
+ return ecc_buf[0] | (ecc_buf[1] << 16) | ((ecc_buf[2] & 0xF0) << 20) |
+ ((ecc_buf[2] & 0x0F) << 8);
+}
+
+/**
+ * @brief Compares the ecc read from nand spare area with ECC
+ * registers values and corrects one bit error if it has occured
+ * Further details can be had from OMAP TRM and the following selected links:
+ * http://en.wikipedia.org/wiki/Hamming_code
+ * http://www.cs.utexas.edu/users/plaxton/c/337/05f/slides/ErrorCorrection-4.pdf
+ *
+ * @param mtd - mtd info structure
+ * @param dat page data
+ * @param read_ecc ecc readback
+ * @param calc_ecc calculated ecc (from reg)
+ *
+ * @return 0 if data is OK or corrected, else returns -1
+ */
+static int omap_correct_data(struct mtd_info *mtd, uint8_t *dat,
+ uint8_t *read_ecc, uint8_t *calc_ecc)
+{
+ unsigned int orig_ecc, new_ecc, res, hm;
+ unsigned short parity_bits, byte;
+ unsigned char bit;
+ struct nand_chip *nand = (struct nand_chip *)(mtd->priv);
+ struct gpmc_nand_info *oinfo = (struct gpmc_nand_info *)(nand->priv);
+
+ gpmcnand_dbg("mtd=%x dat=%x read_ecc=%x calc_ecc=%x", (unsigned int)mtd,
+ (unsigned int)dat, (unsigned int)read_ecc,
+ (unsigned int)calc_ecc);
+
+ /* Regenerate the orginal ECC */
+ orig_ecc = gen_true_ecc(read_ecc);
+ new_ecc = gen_true_ecc(calc_ecc);
+ /* Get the XOR of real ecc */
+ res = orig_ecc ^ new_ecc;
+ if (res) {
+ /* Get the hamming width */
+ hm = hweight32(res);
+ /* Single bit errors can be corrected! */
+ if (hm == oinfo->ecc_parity_pairs) {
+ /* Correctable data! */
+ parity_bits = res >> 16;
+ bit = (parity_bits & 0x7);
+ byte = (parity_bits >> 3) & 0x1FF;
+ /* Flip the bit to correct */
+ dat[byte] ^= (0x1 << bit);
+
+ } else if (hm == 1) {
+ gpmcnand_err("Ecc is wrong\n");
+ /* ECC itself is corrupted */
+ return 2;
+ } else {
+ gpmcnand_err("bad compare! failed\n");
+ /* detected 2 bit error */
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/**
+ * @brief Using noninverted ECC can be considered ugly since writing a blank
+ * page ie. padding will clear the ECC bytes. This is no problem as long
+ * nobody is trying to write data on the seemingly unused page. Reading
+ * an erased page will produce an ECC mismatch between generated and read
+ * ECC bytes that has to be dealt with separately.
+ *
+ * @param mtd - mtd info structure
+ * @param dat data being written
+ * @param ecc_code ecc code returned back to nand layer
+ *
+ * @return 0
+ */
+static int omap_calculate_ecc(struct mtd_info *mtd, const uint8_t *dat,
+ uint8_t *ecc_code)
+{
+ struct nand_chip *nand = (struct nand_chip *)(mtd->priv);
+ struct gpmc_nand_info *oinfo = (struct gpmc_nand_info *)(nand->priv);
+ unsigned int val;
+ gpmcnand_dbg("mtd=%x dat=%x ecc_code=%x", (unsigned int)mtd,
+ (unsigned int)dat, (unsigned int)ecc_code);
+ debug("ecc 0 1 2 = %x %x %x", ecc_code[0], ecc_code[1], ecc_code[2]);
+
+ /* Since we smartly tell mtd driver to use eccsize of 512, only
+ * ECC Reg1 will be used.. we just read that */
+ val = readl(oinfo->gpmc_base + GPMC_ECC1_RESULT);
+ ecc_code[0] = val & 0xFF;
+ ecc_code[1] = (val >> 16) & 0xFF;
+ ecc_code[2] = ((val >> 8) & 0x0f) | ((val >> 20) & 0xf0);
+
+ /* Stop reading anymore ECC vals and clear old results
+ * enable will be called if more reads are required */
+ writel(0x000, oinfo->gpmc_base + GPMC_ECC_CONFIG);
+ return 0;
+}
+
+/*
+ * omap_enable_ecc - This function enables the hardware ecc functionality
+ * @param mtd - mtd info structure
+ * @param mode - Read/Write mode
+ */
+static void omap_enable_hwecc(struct mtd_info *mtd, int mode)
+{
+ struct nand_chip *nand = (struct nand_chip *)(mtd->priv);
+ struct gpmc_nand_info *oinfo = (struct gpmc_nand_info *)(nand->priv);
+ gpmcnand_dbg("mtd=%x mode=%x", (unsigned int)mtd, mode);
+ switch (mode) {
+ case NAND_ECC_READ:
+ case NAND_ECC_WRITE:
+ /* Clear the ecc result registers
+ * select ecc reg as 1
+ */
+ writel(0x101, oinfo->gpmc_base + GPMC_ECC_CONTROL);
+ /* Size 0 = 0xFF, Size1 is 0xFF - both are 512 bytes
+ * tell all regs to generate size0 sized regs
+ * we just have a single ECC engine for all CS
+ */
+ writel(0x3FCFF000, oinfo->gpmc_base +
+ GPMC_ECC_SIZE_CONFIG);
+ writel(oinfo->ecc_config, oinfo->gpmc_base +
+ GPMC_ECC_CONFIG);
+ break;
+ default:
+ gpmcnand_err("Error: Unrecognized Mode[%d]!\n", mode);
+ break;
+ }
+}
+#endif /* CONFIG_NAND_OMAP_GPMC_HWECC */
+
+/**
+ * @brief nand device probe.
+ *
+ * @param pdev -matching device
+ *
+ * @return -failure reason or give 0
+ */
+static int gpmc_nand_probe(struct device_d *pdev)
+{
+ struct gpmc_nand_info *oinfo;
+ struct gpmc_nand_platform_data *pdata;
+ struct nand_chip *nand;
+ struct mtd_info *minfo;
+ unsigned long cs_base;
+ int err;
+
+ gpmcnand_dbg("pdev=%x", (unsigned int)pdev);
+ pdata = (struct gpmc_nand_platform_data *)pdev->platform_data;
+ if (pdata == NULL) {
+ gpmcnand_err("platform data missing\n");
+ return -ENODEV;
+ }
+
+ oinfo = calloc(1, sizeof(struct gpmc_nand_info));
+ if (!oinfo) {
+ gpmcnand_err("oinfo alloc failed!\n");
+ return -ENOMEM;
+ }
+
+ /* fill up my data structures */
+ oinfo->pdev = pdev;
+ oinfo->pdata = pdata;
+ pdev->platform_data = (void *)oinfo;
+
+ nand = &oinfo->nand;
+ nand->priv = (void *)oinfo;
+
+ minfo = &oinfo->minfo;
+ minfo->priv = (void *)nand;
+
+ if (pdata->cs >= GPMC_NUM_CS) {
+ gpmcnand_err("Invalid CS!\n");
+ err = -EINVAL;
+ goto out_release_mem;
+ }
+ /* Setup register specific data */
+ oinfo->gpmc_cs = pdata->cs;
+ oinfo->gpmc_base = pdev->map_base;
+ cs_base = oinfo->gpmc_base + GPMC_CONFIG1_0 +
+ (pdata->cs * GPMC_CONFIG_CS_SIZE);
+ oinfo->gpmc_command = (void *)(cs_base + GPMC_CS_NAND_COMMAND);
+ oinfo->gpmc_address = (void *)(cs_base + GPMC_CS_NAND_ADDRESS);
+ oinfo->gpmc_data = (void *)(cs_base + GPMC_CS_NAND_DATA);
+ oinfo->timeout = pdata->max_timeout;
+ debug("GPMC Details:\n"
+ "GPMC BASE=%x\n"
+ "CMD=%x\n"
+ "ADDRESS=%x\n"
+ "DATA=%x\n"
+ "CS_BASE=%x\n",
+ oinfo->gpmc_base, oinfo->gpmc_command,
+ oinfo->gpmc_address, oinfo->gpmc_data, cs_base);
+
+ /* If we are 16 bit dev, our gpmc config tells us that */
+ if ((readl(cs_base) & 0x3000) == 0x1000) {
+ debug("16 bit dev\n");
+ nand->options |= NAND_BUSWIDTH_16;
+ }
+
+ /* Same data register for in and out */
+ nand->IO_ADDR_W = nand->IO_ADDR_R = (void *)oinfo->gpmc_data;
+ /*
+ * If RDY/BSY line is connected to OMAP then use the omap ready
+ * function and the generic nand_wait function which reads the
+ * status register after monitoring the RDY/BSY line. Otherwise
+ * use a standard chip delay which is slightly more than tR
+ * (AC Timing) of the NAND device and read the status register
+ * until you get a failure or success
+ */
+ if (pdata->wait_mon_pin > 4) {
+ gpmcnand_err("Invalid wait monitoring pin\n");
+ err = -EINVAL;
+ goto out_release_mem;
+ }
+ if (pdata->wait_mon_pin) {
+ /* Set up the wait monitoring mask
+ * This is GPMC_STATUS reg relevant */
+ oinfo->wait_mon_mask = (0x1 << (pdata->wait_mon_pin - 1)) << 8;
+ oinfo->wait_pol = (pdata->plat_options & NAND_WAITPOL_MASK);
+ nand->dev_ready = omap_dev_ready;
+ nand->chip_delay = 0;
+ } else {
+ /* use the default nand_wait function */
+ nand->chip_delay = 50;
+ }
+
+ /* Use default cmdfunc */
+ /* nand cmd control */
+ nand->cmd_ctrl = omap_hwcontrol;
+
+ /* Dont do a bbt scan at the start */
+ nand->options |= NAND_SKIP_BBTSCAN;
+
+ /* State my controller */
+ nand->controller = &oinfo->controller;
+
+ /* if a different placement scheme is requested */
+ if (pdata->oob)
+ nand->ecc.layout = pdata->oob;
+
+#ifdef CONFIG_NAND_OMAP_GPMC_HWECC
+ if (pdata->plat_options & NAND_HWECC_ENABLE) {
+ /* Program how many columns we expect+
+ * enable the cs we want and enable the engine
+ */
+ oinfo->ecc_config = (pdata->cs << 1) |
+ ((nand->options & NAND_BUSWIDTH_16) ?
+ (0x1 << 7) : 0x0) | 0x1;
+ nand->ecc.hwctl = omap_enable_hwecc;
+ nand->ecc.calculate = omap_calculate_ecc;
+ nand->ecc.correct = omap_correct_data;
+ nand->ecc.mode = NAND_ECC_HW;
+ nand->ecc.size = 512;
+ nand->ecc.bytes = 3;
+ nand->ecc.steps = nand->ecc.layout->eccbytes / nand->ecc.bytes;
+ oinfo->ecc_parity_pairs = 12;
+ } else
+#endif
+ nand->ecc.mode = NAND_ECC_SOFT;
+
+ /* All information is ready.. now lets call setup, if present */
+ if (pdata->nand_setup) {
+ err = pdata->nand_setup(pdata);
+ if (err) {
+ gpmcnand_err("pdataform setup failed\n");
+ goto out_release_mem;
+ }
+ }
+ /* Remove write protection */
+ gpmc_nand_wp(oinfo, 0);
+
+ /* we do not know what state of device we have is, so
+ * Send a reset to the device
+ * 8 bit write will work on 16 and 8 bit devices
+ */
+ writeb(NAND_CMD_RESET, oinfo->gpmc_command);
+ mdelay(1);
+
+ /* In normal mode, we scan to get just the device
+ * presence and then to get the device geometry
+ */
+ if (nand_scan(minfo, 1)) {
+ gpmcnand_err("device scan failed\n");
+ err = -ENXIO;
+ goto out_release_mem;
+ }
+
+ /* We are all set to register with the system now! */
+ err = add_mtd_device(minfo);
+ if (err) {
+ gpmcnand_err("device registration failed\n");
+ goto out_release_mem;
+ }
+ return 0;
+
+out_release_mem:
+ if (oinfo)
+ free(oinfo);
+
+ gpmcnand_err("Failed!!\n");
+ return err;
+}
+
+/** GMPC nand driver -> device registered by platforms */
+static struct driver_d gpmc_nand_driver = {
+ .name = "gpmc_nand",
+ .probe = gpmc_nand_probe,
+};
+
+static int gpmc_nand_init(void)
+{
+ return register_driver(&gpmc_nand_driver);
+}
+
+device_initcall(gpmc_nand_init);
diff --git a/drivers/mtd/nand/nand_s3c2410.c b/drivers/mtd/nand/nand_s3c2410.c
new file mode 100644
index 0000000..b989583
--- /dev/null
+++ b/drivers/mtd/nand/nand_s3c2410.c
@@ -0,0 +1,525 @@
+/* linux/drivers/mtd/nand/s3c2410.c
+ *
+ * Copyright (C) 2009 Juergen Beisert, Pengutronix
+ *
+ * Copyright �� 2004-2008 Simtec Electronics
+ * http://armlinux.simtec.co.uk/
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * Samsung S3C2410 NAND driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include <config.h>
+#include <common.h>
+#include <driver.h>
+#include <malloc.h>
+#include <init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <mach/s3c24xx-generic.h>
+#include <mach/s3c24x0-iomap.h>
+#include <mach/s3c24x0-nand.h>
+#include <asm/io.h>
+#include <asm-generic/errno.h>
+
+#ifdef CONFIG_S3C24XX_NAND_BOOT
+# define __nand_boot_init __bare_init
+# ifndef BOARD_DEFAULT_NAND_TIMING
+# define BOARD_DEFAULT_NAND_TIMING 0x0737
+# endif
+#else
+# define __nand_boot_init
+#endif
+
+/**
+ * Define this symbol for testing purpose. It will add a command to read an
+ * image from the NAND like it the boot strap code will do.
+ */
+#define CONFIG_NAND_S3C24XX_BOOT_DEBUG
+
+/* NAND controller's register */
+
+#define NFCONF 0x00
+
+#ifdef CONFIG_CPU_S3C2410
+
+#define NFCMD 0x04
+#define NFADDR 0x08
+#define NFDATA 0x0c
+#define NFSTAT 0x10
+#define NFECC 0x14
+
+/* S3C2410 specific bits */
+#define NFSTAT_BUSY (1)
+#define NFCONF_nFCE (1 << 11)
+#define NFCONF_INITECC (1 << 12)
+#define NFCONF_EN (1 << 15)
+
+#endif /* CONFIG_CPU_S3C2410 */
+
+#ifdef CONFIG_CPU_S3C2440
+
+#define NFCONT 0x04
+#define NFCMD 0x08
+#define NFADDR 0x0C
+#define NFDATA 0x10
+
+#define NFECC 0x1C
+#define NFSTAT 0x20
+
+/* S3C2440 specific bits */
+#define NFSTAT_BUSY (1)
+#define NFCONT_nFCE (1 << 1)
+#define NFCONF_INITECC (1 << 12)
+#define NFCONT_EN (1)
+
+#endif /* CONFIG_CPU_S3C2440 */
+
+
+struct s3c24x0_nand_host {
+ struct mtd_info mtd;
+ struct nand_chip nand;
+ struct mtd_partition *parts;
+ struct device_d *dev;
+
+ unsigned long base;
+};
+
+/**
+ * oob placement block for use with hardware ecc generation
+ */
+static struct nand_ecclayout nand_hw_eccoob = {
+ .eccbytes = 3,
+ .eccpos = { 0, 1, 2},
+ .oobfree = {
+ {
+ .offset = 8,
+ .length = 8
+ }
+ }
+};
+
+/* - Functions shared between the boot strap code and the regular driver - */
+
+/**
+ * Issue the specified command to the NAND device
+ * @param[in] host Base address of the NAND controller
+ * @param[in] cmd Command for NAND flash
+ */
+static void __nand_boot_init send_cmd(unsigned long host, uint8_t cmd)
+{
+ writeb(cmd, host + NFCMD);
+}
+
+/**
+ * Issue the specified address to the NAND device
+ * @param[in] host Base address of the NAND controller
+ * @param[in] addr Address for the NAND flash
+ */
+static void __nand_boot_init send_addr(unsigned long host, uint8_t addr)
+{
+ writeb(addr, host + NFADDR);
+}
+
+/**
+ * Enable the NAND flash access
+ * @param[in] host Base address of the NAND controller
+ */
+static void __nand_boot_init enable_cs(unsigned long host)
+{
+#ifdef CONFIG_CPU_S3C2410
+ writew(readw(host + NFCONF) & ~NFCONF_nFCE, host + NFCONF);
+#endif
+#ifdef CONFIG_CPU_S3C2440
+ writew(readw(host + NFCONT) & ~NFCONT_nFCE, host + NFCONT);
+#endif
+}
+
+/**
+ * Disable the NAND flash access
+ * @param[in] host Base address of the NAND controller
+ */
+static void __nand_boot_init disable_cs(unsigned long host)
+{
+#ifdef CONFIG_CPU_S3C2410
+ writew(readw(host + NFCONF) | NFCONF_nFCE, host + NFCONF);
+#endif
+#ifdef CONFIG_CPU_S3C2440
+ writew(readw(host + NFCONT) | NFCONT_nFCE, host + NFCONT);
+#endif
+}
+
+/**
+ * Enable the NAND flash controller
+ * @param[in] host Base address of the NAND controller
+ * @param[in] timing Timing to access the NAND memory
+ */
+static void __nand_boot_init enable_nand_controller(unsigned long host, uint32_t timing)
+{
+#ifdef CONFIG_CPU_S3C2410
+ writew(timing + NFCONF_EN + NFCONF_nFCE, host + NFCONF);
+#endif
+#ifdef CONFIG_CPU_S3C2440
+ writew(NFCONT_EN + NFCONT_nFCE, host + NFCONT);
+ writew(timing, host + NFCONF);
+#endif
+}
+
+/**
+ * Diable the NAND flash controller
+ * @param[in] host Base address of the NAND controller
+ */
+static void __nand_boot_init disable_nand_controller(unsigned long host)
+{
+#ifdef CONFIG_CPU_S3C2410
+ writew(NFCONF_nFCE, host + NFCONF);
+#endif
+#ifdef CONFIG_CPU_S3C2440
+ writew(NFCONT_nFCE, host + NFCONT);
+#endif
+}
+
+/* ----------------------------------------------------------------------- */
+
+/**
+ * Check the ECC and try to repair the data if possible
+ * @param[in] mtd_info FIXME
+ * @param[inout] dat Pointer to the data buffer that might contain a bit error
+ * @param[in] read_ecc ECC data from the OOB space
+ * @param[in] calc_ecc ECC data calculated from the data
+ * @return 0 no error, 1 repaired error, -1 no way...
+ *
+ * @note: Alsways 512 byte of data
+ */
+static int s3c2410_nand_correct_data(struct mtd_info *mtd, uint8_t *dat,
+ uint8_t *read_ecc, uint8_t *calc_ecc)
+{
+ unsigned int diff0, diff1, diff2;
+ unsigned int bit, byte;
+
+ diff0 = read_ecc[0] ^ calc_ecc[0];
+ diff1 = read_ecc[1] ^ calc_ecc[1];
+ diff2 = read_ecc[2] ^ calc_ecc[2];
+
+ if (diff0 == 0 && diff1 == 0 && diff2 == 0)
+ return 0; /* ECC is ok */
+
+ /* sometimes people do not think about using the ECC, so check
+ * to see if we have an 0xff,0xff,0xff read ECC and then ignore
+ * the error, on the assumption that this is an un-eccd page.
+ */
+ if (read_ecc[0] == 0xff && read_ecc[1] == 0xff && read_ecc[2] == 0xff
+ /* && info->platform->ignore_unset_ecc */)
+ return 0;
+
+ /* Can we correct this ECC (ie, one row and column change).
+ * Note, this is similar to the 256 error code on smartmedia */
+
+ if (((diff0 ^ (diff0 >> 1)) & 0x55) == 0x55 &&
+ ((diff1 ^ (diff1 >> 1)) & 0x55) == 0x55 &&
+ ((diff2 ^ (diff2 >> 1)) & 0x55) == 0x55) {
+ /* calculate the bit position of the error */
+
+ bit = ((diff2 >> 3) & 1) |
+ ((diff2 >> 4) & 2) |
+ ((diff2 >> 5) & 4);
+
+ /* calculate the byte position of the error */
+
+ byte = ((diff2 << 7) & 0x100) |
+ ((diff1 << 0) & 0x80) |
+ ((diff1 << 1) & 0x40) |
+ ((diff1 << 2) & 0x20) |
+ ((diff1 << 3) & 0x10) |
+ ((diff0 >> 4) & 0x08) |
+ ((diff0 >> 3) & 0x04) |
+ ((diff0 >> 2) & 0x02) |
+ ((diff0 >> 1) & 0x01);
+
+ dat[byte] ^= (1 << bit);
+ return 1;
+ }
+
+ /* if there is only one bit difference in the ECC, then
+ * one of only a row or column parity has changed, which
+ * means the error is most probably in the ECC itself */
+
+ diff0 |= (diff1 << 8);
+ diff0 |= (diff2 << 16);
+
+ if ((diff0 & ~(1<<fls(diff0))) == 0)
+ return 1;
+
+ return -1;
+}
+
+static void s3c2410_nand_enable_hwecc(struct mtd_info *mtd, int mode)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct s3c24x0_nand_host *host = nand_chip->priv;
+
+ writel(readl(host->base + NFCONF) | NFCONF_INITECC , host->base + NFCONF);
+}
+
+static int s3c2410_nand_calculate_ecc(struct mtd_info *mtd, const uint8_t *dat, uint8_t *ecc_code)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct s3c24x0_nand_host *host = nand_chip->priv;
+
+ ecc_code[0] = readb(host->base + NFECC);
+ ecc_code[1] = readb(host->base + NFECC + 1);
+ ecc_code[2] = readb(host->base + NFECC + 2);
+
+ return 0;
+}
+
+static void s3c24x0_nand_select_chip(struct mtd_info *mtd, int chip)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct s3c24x0_nand_host *host = nand_chip->priv;
+
+ if (chip == -1)
+ disable_cs(host->base);
+ else
+ enable_cs(host->base);
+}
+
+static int s3c24x0_nand_devready(struct mtd_info *mtd)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct s3c24x0_nand_host *host = nand_chip->priv;
+
+ return readw(host->base + NFSTAT) & NFSTAT_BUSY;
+}
+
+static void s3c24x0_nand_hwcontrol(struct mtd_info *mtd, int cmd,
+ unsigned int ctrl)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct s3c24x0_nand_host *host = nand_chip->priv;
+
+ if (cmd == NAND_CMD_NONE)
+ return;
+ /*
+ * If the CLE should be active, this call is a NAND command
+ */
+ if (ctrl & NAND_CLE)
+ send_cmd(host->base, cmd);
+ /*
+ * If the ALE should be active, this call is a NAND address
+ */
+ if (ctrl & NAND_ALE)
+ send_addr(host->base, cmd);
+}
+
+static int s3c24x0_nand_inithw(struct s3c24x0_nand_host *host)
+{
+ struct s3c24x0_nand_platform_data *pdata = host->dev->platform_data;
+ uint32_t tmp;
+
+ /* reset the NAND controller */
+ disable_nand_controller(host->base);
+
+ if (pdata != NULL)
+ tmp = pdata->nand_timing;
+ else
+ /* else slowest possible timing */
+ tmp = CALC_NFCONF_TIMING(4, 8, 8);
+
+ /* reenable the NAND controller */
+ enable_nand_controller(host->base, tmp);
+
+ return 0;
+}
+
+static int s3c24x0_nand_probe(struct device_d *dev)
+{
+ struct nand_chip *chip;
+ struct mtd_info *mtd;
+ struct s3c24x0_nand_host *host;
+ int ret;
+
+ /* Allocate memory for MTD device structure and private data */
+ host = kzalloc(sizeof(struct s3c24x0_nand_host), GFP_KERNEL);
+ if (!host)
+ return -ENOMEM;
+
+ host->dev = dev;
+ host->base = dev->map_base;
+
+ /* structures must be linked */
+ chip = &host->nand;
+ mtd = &host->mtd;
+ mtd->priv = chip;
+
+ /* init the default settings */
+#if 0
+ /* TODO: Will follow later */
+ init_nand_chip_bw8(chip);
+#endif
+ /* 50 us command delay time */
+ chip->chip_delay = 50;
+ chip->priv = host;
+
+ chip->IO_ADDR_R = chip->IO_ADDR_W = (void*)(dev->map_base + NFDATA);
+
+ chip->cmd_ctrl = s3c24x0_nand_hwcontrol;
+ chip->dev_ready = s3c24x0_nand_devready;
+ chip->select_chip = s3c24x0_nand_select_chip;
+
+ /* we are using the hardware ECC feature of this device */
+ chip->ecc.calculate = s3c2410_nand_calculate_ecc;
+ chip->ecc.correct = s3c2410_nand_correct_data;
+ chip->ecc.hwctl = s3c2410_nand_enable_hwecc;
+ chip->ecc.calculate = s3c2410_nand_calculate_ecc;
+
+ /* our hardware capabilities */
+ chip->ecc.mode = NAND_ECC_HW;
+ chip->ecc.size = 512;
+ chip->ecc.bytes = 3;
+ chip->ecc.layout = &nand_hw_eccoob;
+
+ ret = s3c24x0_nand_inithw(host);
+ if (ret != 0)
+ goto on_error;
+
+ /* Scan to find existence of the device */
+ ret = nand_scan(mtd, 1);
+ if (ret != 0) {
+ ret = -ENXIO;
+ goto on_error;
+ }
+
+ return add_mtd_device(mtd);
+
+on_error:
+ free(host);
+ return ret;
+}
+
+static struct driver_d s3c24x0_nand_driver = {
+ .name = "s3c24x0_nand",
+ .probe = s3c24x0_nand_probe,
+};
+
+#ifdef CONFIG_S3C24XX_NAND_BOOT
+
+static void __nand_boot_init wait_for_completion(unsigned long host)
+{
+ while (!(readw(host + NFSTAT) & NFSTAT_BUSY))
+ ;
+}
+
+static void __nand_boot_init nfc_addr(unsigned long host, uint32_t offs)
+{
+ send_addr(host, offs & 0xff);
+ send_addr(host, (offs >> 9) & 0xff);
+ send_addr(host, (offs >> 17) & 0xff);
+ send_addr(host, (offs >> 25) & 0xff);
+}
+
+/**
+ * Load a sequential count of blocks from the NAND into memory
+ * @param[out] dest Pointer to target area (in SDRAM)
+ * @param[in] size Bytes to read from NAND device
+ * @param[in] page Start page to read from
+ * @param[in] pagesize Size of each page in the NAND
+ *
+ * This function must be located in the first 4kiB of the barebox image
+ * (guess why). When this routine is running the SDRAM is up and running
+ * and it runs from the correct address (physical=linked address).
+ * TODO Could we access the platform data from the boardfile?
+ * Due to it makes no sense this function does not return in case of failure.
+ */
+void __nand_boot_init s3c24x0_nand_load_image(void *dest, int size, int page, int pagesize)
+{
+ unsigned long host = S3C24X0_NAND_BASE;
+ int i;
+
+ /*
+ * Reenable the NFC and use the default (but slow) access
+ * timing or the board specific setting if provided.
+ */
+ enable_nand_controller(host, BOARD_DEFAULT_NAND_TIMING);
+ enable_cs(host);
+
+ /* Reset the NAND device */
+ send_cmd(host, NAND_CMD_RESET);
+ wait_for_completion(host);
+ disable_cs(host);
+
+ do {
+ enable_cs(host);
+ send_cmd(host, NAND_CMD_READ0);
+ nfc_addr(host, page * pagesize);
+ wait_for_completion(host);
+ /* copy one page (do *not* use readsb() here!)*/
+ for (i = 0; i < pagesize; i++)
+ writeb(readb(host + NFDATA), (unsigned long)(dest + i));
+ disable_cs(host);
+
+ page++;
+ dest += pagesize;
+ size -= pagesize;
+ } while (size >= 0);
+
+ /* disable the controller again */
+ disable_nand_controller(host);
+}
+
+#ifdef CONFIG_NAND_S3C24XX_BOOT_DEBUG
+#include <command.h>
+
+static int do_nand_boot_test(struct command *cmdtp, int argc, char *argv[])
+{
+ void *dest;
+ int size, pagesize;
+
+ if (argc < 3)
+ return COMMAND_ERROR_USAGE;
+
+ dest = (void *)strtoul_suffix(argv[1], NULL, 0);
+ size = strtoul_suffix(argv[2], NULL, 0);
+ pagesize = strtoul_suffix(argv[3], NULL, 0);
+
+ s3c24x0_nand_load_image(dest, size, 0, pagesize);
+
+ return 0;
+}
+
+static const __maybe_unused char cmd_nand_boot_test_help[] =
+"Usage: nand_boot_test <dest> <size> <pagesize>\n";
+
+BAREBOX_CMD_START(nand_boot_test)
+ .cmd = do_nand_boot_test,
+ .usage = "load an image from NAND",
+ BAREBOX_CMD_HELP(cmd_nand_boot_test_help)
+BAREBOX_CMD_END
+#endif
+
+#endif /* CONFIG_S3C24XX_NAND_BOOT */
+
+/*
+ * Main initialization routine
+ * @return 0 if successful; non-zero otherwise
+ */
+static int __init s3c24x0_nand_init(void)
+{
+ return register_driver(&s3c24x0_nand_driver);
+}
+
+device_initcall(s3c24x0_nand_init);
diff --git a/drivers/mtd/nand/nand_util.c b/drivers/mtd/nand/nand_util.c
new file mode 100644
index 0000000..d57294e
--- /dev/null
+++ b/drivers/mtd/nand/nand_util.c
@@ -0,0 +1,858 @@
+/*
+ * drivers/nand/nand_util.c
+ *
+ * Copyright (C) 2006 by Weiss-Electronic GmbH.
+ * All rights reserved.
+ *
+ * @author: Guido Classen <clagix@gmail.com>
+ * @descr: NAND Flash support
+ * @references: borrowed heavily from Linux mtd-utils code:
+ * flash_eraseall.c by Arcom Control System Ltd
+ * nandwrite.c by Steven J. Hill (sjhill@realitydiluted.com)
+ * and Thomas Gleixner (tglx@linutronix.de)
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <command.h>
+#include <watchdog.h>
+#include <malloc.h>
+
+#include <nand.h>
+//#include <jffs2/jffs2.h>
+
+typedef struct erase_info erase_info_t;
+typedef struct mtd_info mtd_info_t;
+
+/* support only for native endian JFFS2 */
+#define cpu_to_je16(x) (x)
+#define cpu_to_je32(x) (x)
+
+/*****************************************************************************/
+static int nand_block_bad_scrub(struct mtd_info *mtd, loff_t ofs, int getchip)
+{
+ return 0;
+}
+
+/**
+ * nand_erase_opts: - erase NAND flash with support for various options
+ * (jffs2 formating)
+ *
+ * @param meminfo NAND device to erase
+ * @param opts options, @see struct nand_erase_options
+ * @return 0 in case of success
+ *
+ * This code is ported from flash_eraseall.c from Linux mtd utils by
+ * Arcom Control System Ltd.
+ */
+int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts)
+{
+ struct jffs2_unknown_node cleanmarker;
+ int clmpos = 0;
+ int clmlen = 8;
+ erase_info_t erase;
+ ulong erase_length;
+ int isNAND;
+ int bbtest = 1;
+ int result;
+ int percent_complete = -1;
+ int (*nand_block_bad_old)(struct mtd_info *, loff_t, int) = NULL;
+ const char *mtd_device = meminfo->name;
+
+ memset(&erase, 0, sizeof(erase));
+
+ erase.mtd = meminfo;
+ erase.len = meminfo->erasesize;
+ erase.addr = opts->offset;
+ erase_length = opts->length;
+
+ isNAND = meminfo->type == MTD_NANDFLASH ? 1 : 0;
+
+ if (opts->jffs2) {
+ cleanmarker.magic = cpu_to_je16 (JFFS2_MAGIC_BITMASK);
+ cleanmarker.nodetype = cpu_to_je16 (JFFS2_NODETYPE_CLEANMARKER);
+ if (isNAND) {
+ struct nand_oobinfo *oobinfo = &meminfo->oobinfo;
+
+ /* check for autoplacement */
+ if (oobinfo->useecc == MTD_NANDECC_AUTOPLACE) {
+ /* get the position of the free bytes */
+ if (!oobinfo->oobfree[0][1]) {
+ printf(" Eeep. Autoplacement selected "
+ "and no empty space in oob\n");
+ return -1;
+ }
+ clmpos = oobinfo->oobfree[0][0];
+ clmlen = oobinfo->oobfree[0][1];
+ if (clmlen > 8)
+ clmlen = 8;
+ } else {
+ /* legacy mode */
+ switch (meminfo->oobsize) {
+ case 8:
+ clmpos = 6;
+ clmlen = 2;
+ break;
+ case 16:
+ clmpos = 8;
+ clmlen = 8;
+ break;
+ case 64:
+ clmpos = 16;
+ clmlen = 8;
+ break;
+ }
+ }
+
+ cleanmarker.totlen = cpu_to_je32(8);
+ } else {
+ cleanmarker.totlen =
+ cpu_to_je32(sizeof(struct jffs2_unknown_node));
+ }
+ cleanmarker.hdr_crc = cpu_to_je32(
+ crc32_no_comp(0, (unsigned char *) &cleanmarker,
+ sizeof(struct jffs2_unknown_node) - 4));
+ }
+
+ /* scrub option allows to erase badblock. To prevent internal
+ * check from erase() method, set block check method to dummy
+ * and disable bad block table while erasing.
+ */
+ if (opts->scrub) {
+ struct nand_chip *priv_nand = meminfo->priv;
+
+ nand_block_bad_old = priv_nand->block_bad;
+ priv_nand->block_bad = nand_block_bad_scrub;
+ /* we don't need the bad block table anymore...
+ * after scrub, there are no bad blocks left!
+ */
+ if (priv_nand->bbt) {
+ kfree(priv_nand->bbt);
+ }
+ priv_nand->bbt = NULL;
+ }
+
+ for (;
+ erase.addr < opts->offset + erase_length;
+ erase.addr += meminfo->erasesize) {
+
+ WATCHDOG_RESET ();
+
+ if (!opts->scrub && bbtest) {
+ int ret = meminfo->block_isbad(meminfo, erase.addr);
+ if (ret > 0) {
+ if (!opts->quiet)
+ printf("\rSkipping bad block at "
+ "0x%08x "
+ " \n",
+ erase.addr);
+ continue;
+
+ } else if (ret < 0) {
+ printf("\n%s: MTD get bad block failed: %d\n",
+ mtd_device,
+ ret);
+ return -1;
+ }
+ }
+
+ result = meminfo->erase(meminfo, &erase);
+ if (result != 0) {
+ printf("\n%s: MTD Erase failure: %d\n",
+ mtd_device, result);
+ continue;
+ }
+
+ /* format for JFFS2 ? */
+ if (opts->jffs2) {
+
+ /* write cleanmarker */
+ if (isNAND) {
+ size_t written;
+ result = meminfo->write_oob(meminfo,
+ erase.addr + clmpos,
+ clmlen,
+ &written,
+ (unsigned char *)
+ &cleanmarker);
+ if (result != 0) {
+ printf("\n%s: MTD writeoob failure: %d\n",
+ mtd_device, result);
+ continue;
+ }
+ } else {
+ printf("\n%s: this erase routine only supports"
+ " NAND devices!\n",
+ mtd_device);
+ }
+ }
+
+ if (!opts->quiet) {
+ int percent = (int)
+ ((unsigned long long)
+ (erase.addr+meminfo->erasesize-opts->offset)
+ * 100 / erase_length);
+
+ /* output progress message only at whole percent
+ * steps to reduce the number of messages printed
+ * on (slow) serial consoles
+ */
+ if (percent != percent_complete) {
+ percent_complete = percent;
+
+ printf("\rErasing at 0x%x -- %3d%% complete.",
+ erase.addr, percent);
+
+ if (opts->jffs2 && result == 0)
+ printf(" Cleanmarker written at 0x%x.",
+ erase.addr);
+ }
+ }
+ }
+ if (!opts->quiet)
+ printf("\n");
+
+ if (nand_block_bad_old) {
+ struct nand_chip *priv_nand = meminfo->priv;
+
+ priv_nand->block_bad = nand_block_bad_old;
+ priv_nand->scan_bbt(meminfo);
+ }
+
+ return 0;
+}
+
+#define MAX_PAGE_SIZE 2048
+#define MAX_OOB_SIZE 64
+
+/*
+ * buffer array used for writing data
+ */
+static unsigned char data_buf[MAX_PAGE_SIZE];
+static unsigned char oob_buf[MAX_OOB_SIZE];
+
+/* OOB layouts to pass into the kernel as default */
+static struct nand_oobinfo none_oobinfo = {
+ .useecc = MTD_NANDECC_OFF,
+};
+
+static struct nand_oobinfo jffs2_oobinfo = {
+ .useecc = MTD_NANDECC_PLACE,
+ .eccbytes = 6,
+ .eccpos = { 0, 1, 2, 3, 6, 7 }
+};
+
+static struct nand_oobinfo yaffs_oobinfo = {
+ .useecc = MTD_NANDECC_PLACE,
+ .eccbytes = 6,
+ .eccpos = { 8, 9, 10, 13, 14, 15}
+};
+
+static struct nand_oobinfo autoplace_oobinfo = {
+ .useecc = MTD_NANDECC_AUTOPLACE
+};
+
+/**
+ * nand_write_opts: - write image to NAND flash with support for various options
+ *
+ * @param meminfo NAND device to erase
+ * @param opts write options (@see nand_write_options)
+ * @return 0 in case of success
+ *
+ * This code is ported from nandwrite.c from Linux mtd utils by
+ * Steven J. Hill and Thomas Gleixner.
+ */
+int nand_write_opts(nand_info_t *meminfo, const nand_write_options_t *opts)
+{
+ int imglen = 0;
+ int pagelen;
+ int baderaseblock;
+ int blockstart = -1;
+ loff_t offs;
+ int readlen;
+ int oobinfochanged = 0;
+ int percent_complete = -1;
+ struct nand_oobinfo old_oobinfo;
+ ulong mtdoffset = opts->offset;
+ ulong erasesize_blockalign;
+ u_char *buffer = opts->buffer;
+ size_t written;
+ int result;
+
+ if (opts->pad && opts->writeoob) {
+ printf("Can't pad when oob data is present.\n");
+ return -1;
+ }
+
+ /* set erasesize to specified number of blocks - to match
+ * jffs2 (virtual) block size */
+ if (opts->blockalign == 0) {
+ erasesize_blockalign = meminfo->erasesize;
+ } else {
+ erasesize_blockalign = meminfo->erasesize * opts->blockalign;
+ }
+
+ /* make sure device page sizes are valid */
+ if (!(meminfo->oobsize == 16 && meminfo->oobblock == 512)
+ && !(meminfo->oobsize == 8 && meminfo->oobblock == 256)
+ && !(meminfo->oobsize == 64 && meminfo->oobblock == 2048)) {
+ printf("Unknown flash (not normal NAND)\n");
+ return -1;
+ }
+
+ /* read the current oob info */
+ memcpy(&old_oobinfo, &meminfo->oobinfo, sizeof(old_oobinfo));
+
+ /* write without ecc? */
+ if (opts->noecc) {
+ memcpy(&meminfo->oobinfo, &none_oobinfo,
+ sizeof(meminfo->oobinfo));
+ oobinfochanged = 1;
+ }
+
+ /* autoplace ECC? */
+ if (opts->autoplace && (old_oobinfo.useecc != MTD_NANDECC_AUTOPLACE)) {
+
+ memcpy(&meminfo->oobinfo, &autoplace_oobinfo,
+ sizeof(meminfo->oobinfo));
+ oobinfochanged = 1;
+ }
+
+ /* force OOB layout for jffs2 or yaffs? */
+ if (opts->forcejffs2 || opts->forceyaffs) {
+ struct nand_oobinfo *oobsel =
+ opts->forcejffs2 ? &jffs2_oobinfo : &yaffs_oobinfo;
+
+ if (meminfo->oobsize == 8) {
+ if (opts->forceyaffs) {
+ printf("YAFSS cannot operate on "
+ "256 Byte page size\n");
+ goto restoreoob;
+ }
+ /* Adjust number of ecc bytes */
+ jffs2_oobinfo.eccbytes = 3;
+ }
+
+ memcpy(&meminfo->oobinfo, oobsel, sizeof(meminfo->oobinfo));
+ }
+
+ /* get image length */
+ imglen = opts->length;
+ pagelen = meminfo->oobblock
+ + ((opts->writeoob != 0) ? meminfo->oobsize : 0);
+
+ /* check, if file is pagealigned */
+ if ((!opts->pad) && ((imglen % pagelen) != 0)) {
+ printf("Input block length is not page aligned\n");
+ goto restoreoob;
+ }
+
+ /* check, if length fits into device */
+ if (((imglen / pagelen) * meminfo->oobblock)
+ > (meminfo->size - opts->offset)) {
+ printf("Image %d bytes, NAND page %d bytes, "
+ "OOB area %u bytes, device size %u bytes\n",
+ imglen, pagelen, meminfo->oobblock, meminfo->size);
+ printf("Input block does not fit into device\n");
+ goto restoreoob;
+ }
+
+ if (!opts->quiet)
+ printf("\n");
+
+ /* get data from input and write to the device */
+ while (imglen && (mtdoffset < meminfo->size)) {
+
+ WATCHDOG_RESET ();
+
+ /*
+ * new eraseblock, check for bad block(s). Stay in the
+ * loop to be sure if the offset changes because of
+ * a bad block, that the next block that will be
+ * written to is also checked. Thus avoiding errors if
+ * the block(s) after the skipped block(s) is also bad
+ * (number of blocks depending on the blockalign
+ */
+ while (blockstart != (mtdoffset & (~erasesize_blockalign+1))) {
+ blockstart = mtdoffset & (~erasesize_blockalign+1);
+ offs = blockstart;
+ baderaseblock = 0;
+
+ /* check all the blocks in an erase block for
+ * bad blocks */
+ do {
+ int ret = meminfo->block_isbad(meminfo, offs);
+
+ if (ret < 0) {
+ printf("Bad block check failed\n");
+ goto restoreoob;
+ }
+ if (ret == 1) {
+ baderaseblock = 1;
+ if (!opts->quiet)
+ printf("\rBad block at 0x%lx "
+ "in erase block from "
+ "0x%x will be skipped\n",
+ (long) offs,
+ blockstart);
+ }
+
+ if (baderaseblock) {
+ mtdoffset = blockstart
+ + erasesize_blockalign;
+ }
+ offs += erasesize_blockalign
+ / opts->blockalign;
+ } while (offs < blockstart + erasesize_blockalign);
+ }
+
+ readlen = meminfo->oobblock;
+ if (opts->pad && (imglen < readlen)) {
+ readlen = imglen;
+ memset(data_buf + readlen, 0xff,
+ meminfo->oobblock - readlen);
+ }
+
+ /* read page data from input memory buffer */
+ memcpy(data_buf, buffer, readlen);
+ buffer += readlen;
+
+ if (opts->writeoob) {
+ /* read OOB data from input memory block, exit
+ * on failure */
+ memcpy(oob_buf, buffer, meminfo->oobsize);
+ buffer += meminfo->oobsize;
+
+ /* write OOB data first, as ecc will be placed
+ * in there*/
+ result = meminfo->write_oob(meminfo,
+ mtdoffset,
+ meminfo->oobsize,
+ &written,
+ (unsigned char *)
+ &oob_buf);
+
+ if (result != 0) {
+ printf("\nMTD writeoob failure: %d\n",
+ result);
+ goto restoreoob;
+ }
+ imglen -= meminfo->oobsize;
+ }
+
+ /* write out the page data */
+ result = meminfo->write(meminfo,
+ mtdoffset,
+ meminfo->oobblock,
+ &written,
+ (unsigned char *) &data_buf);
+
+ if (result != 0) {
+ printf("writing NAND page at offset 0x%lx failed\n",
+ mtdoffset);
+ goto restoreoob;
+ }
+ imglen -= readlen;
+
+ if (!opts->quiet) {
+ int percent = (int)
+ ((unsigned long long)
+ (opts->length-imglen) * 100
+ / opts->length);
+ /* output progress message only at whole percent
+ * steps to reduce the number of messages printed
+ * on (slow) serial consoles
+ */
+ if (percent != percent_complete) {
+ printf("\rWriting data at 0x%x "
+ "-- %3d%% complete.",
+ mtdoffset, percent);
+ percent_complete = percent;
+ }
+ }
+
+ mtdoffset += meminfo->oobblock;
+ }
+
+ if (!opts->quiet)
+ printf("\n");
+
+restoreoob:
+ if (oobinfochanged) {
+ memcpy(&meminfo->oobinfo, &old_oobinfo,
+ sizeof(meminfo->oobinfo));
+ }
+
+ if (imglen > 0) {
+ printf("Data did not fit into device, due to bad blocks\n");
+ return -1;
+ }
+
+ /* return happy */
+ return 0;
+}
+
+/**
+ * nand_read_opts: - read image from NAND flash with support for various options
+ *
+ * @param meminfo NAND device to erase
+ * @param opts read options (@see struct nand_read_options)
+ * @return 0 in case of success
+ *
+ */
+int nand_read_opts(nand_info_t *meminfo, const nand_read_options_t *opts)
+{
+ int imglen = opts->length;
+ int pagelen;
+ int baderaseblock;
+ int blockstart = -1;
+ int percent_complete = -1;
+ loff_t offs;
+ size_t readlen;
+ ulong mtdoffset = opts->offset;
+ u_char *buffer = opts->buffer;
+ int result;
+
+ /* make sure device page sizes are valid */
+ if (!(meminfo->oobsize == 16 && meminfo->oobblock == 512)
+ && !(meminfo->oobsize == 8 && meminfo->oobblock == 256)
+ && !(meminfo->oobsize == 64 && meminfo->oobblock == 2048)) {
+ printf("Unknown flash (not normal NAND)\n");
+ return -1;
+ }
+
+ pagelen = meminfo->oobblock
+ + ((opts->readoob != 0) ? meminfo->oobsize : 0);
+
+ /* check, if length is not larger than device */
+ if (((imglen / pagelen) * meminfo->oobblock)
+ > (meminfo->size - opts->offset)) {
+ printf("Image %d bytes, NAND page %d bytes, "
+ "OOB area %u bytes, device size %u bytes\n",
+ imglen, pagelen, meminfo->oobblock, meminfo->size);
+ printf("Input block is larger than device\n");
+ return -1;
+ }
+
+ if (!opts->quiet)
+ printf("\n");
+
+ /* get data from input and write to the device */
+ while (imglen && (mtdoffset < meminfo->size)) {
+
+ WATCHDOG_RESET ();
+
+ /*
+ * new eraseblock, check for bad block(s). Stay in the
+ * loop to be sure if the offset changes because of
+ * a bad block, that the next block that will be
+ * written to is also checked. Thus avoiding errors if
+ * the block(s) after the skipped block(s) is also bad
+ * (number of blocks depending on the blockalign
+ */
+ while (blockstart != (mtdoffset & (~meminfo->erasesize+1))) {
+ blockstart = mtdoffset & (~meminfo->erasesize+1);
+ offs = blockstart;
+ baderaseblock = 0;
+
+ /* check all the blocks in an erase block for
+ * bad blocks */
+ do {
+ int ret = meminfo->block_isbad(meminfo, offs);
+
+ if (ret < 0) {
+ printf("Bad block check failed\n");
+ return -1;
+ }
+ if (ret == 1) {
+ baderaseblock = 1;
+ if (!opts->quiet)
+ printf("\rBad block at 0x%lx "
+ "in erase block from "
+ "0x%x will be skipped\n",
+ (long) offs,
+ blockstart);
+ }
+
+ if (baderaseblock) {
+ mtdoffset = blockstart
+ + meminfo->erasesize;
+ }
+ offs += meminfo->erasesize;
+
+ } while (offs < blockstart + meminfo->erasesize);
+ }
+
+
+ /* read page data to memory buffer */
+ result = meminfo->read(meminfo,
+ mtdoffset,
+ meminfo->oobblock,
+ &readlen,
+ (unsigned char *) &data_buf);
+
+ if (result != 0) {
+ printf("reading NAND page at offset 0x%lx failed\n",
+ mtdoffset);
+ return -1;
+ }
+
+ if (imglen < readlen) {
+ readlen = imglen;
+ }
+
+ memcpy(buffer, data_buf, readlen);
+ buffer += readlen;
+ imglen -= readlen;
+
+ if (opts->readoob) {
+ result = meminfo->read_oob(meminfo,
+ mtdoffset,
+ meminfo->oobsize,
+ &readlen,
+ (unsigned char *)
+ &oob_buf);
+
+ if (result != 0) {
+ printf("\nMTD readoob failure: %d\n",
+ result);
+ return -1;
+ }
+
+
+ if (imglen < readlen) {
+ readlen = imglen;
+ }
+
+ memcpy(buffer, oob_buf, readlen);
+
+ buffer += readlen;
+ imglen -= readlen;
+ }
+
+ if (!opts->quiet) {
+ int percent = (int)
+ ((unsigned long long)
+ (opts->length-imglen) * 100
+ / opts->length);
+ /* output progress message only at whole percent
+ * steps to reduce the number of messages printed
+ * on (slow) serial consoles
+ */
+ if (percent != percent_complete) {
+ if (!opts->quiet)
+ printf("\rReading data from 0x%x "
+ "-- %3d%% complete.",
+ mtdoffset, percent);
+ percent_complete = percent;
+ }
+ }
+
+ mtdoffset += meminfo->oobblock;
+ }
+
+ if (!opts->quiet)
+ printf("\n");
+
+ if (imglen > 0) {
+ printf("Could not read entire image due to bad blocks\n");
+ return -1;
+ }
+
+ /* return happy */
+ return 0;
+}
+
+/******************************************************************************
+ * Support for locking / unlocking operations of some NAND devices
+ *****************************************************************************/
+
+#define NAND_CMD_LOCK 0x2a
+#define NAND_CMD_LOCK_TIGHT 0x2c
+#define NAND_CMD_UNLOCK1 0x23
+#define NAND_CMD_UNLOCK2 0x24
+#define NAND_CMD_LOCK_STATUS 0x7a
+
+/**
+ * nand_lock: Set all pages of NAND flash chip to the LOCK or LOCK-TIGHT
+ * state
+ *
+ * @param meminfo nand mtd instance
+ * @param tight bring device in lock tight mode
+ *
+ * @return 0 on success, -1 in case of error
+ *
+ * The lock / lock-tight command only applies to the whole chip. To get some
+ * parts of the chip lock and others unlocked use the following sequence:
+ *
+ * - Lock all pages of the chip using nand_lock(mtd, 0) (or the lockpre pin)
+ * - Call nand_unlock() once for each consecutive area to be unlocked
+ * - If desired: Bring the chip to the lock-tight state using nand_lock(mtd, 1)
+ *
+ * If the device is in lock-tight state software can't change the
+ * current active lock/unlock state of all pages. nand_lock() / nand_unlock()
+ * calls will fail. It is only posible to leave lock-tight state by
+ * an hardware signal (low pulse on _WP pin) or by power down.
+ */
+int nand_lock(nand_info_t *meminfo, int tight)
+{
+ int ret = 0;
+ int status;
+ struct nand_chip *this = meminfo->priv;
+
+ /* select the NAND device */
+ this->select_chip(meminfo, 0);
+
+ this->cmdfunc(meminfo,
+ (tight ? NAND_CMD_LOCK_TIGHT : NAND_CMD_LOCK),
+ -1, -1);
+
+ /* call wait ready function */
+ status = this->waitfunc(meminfo, this, FL_WRITING);
+
+ /* see if device thinks it succeeded */
+ if (status & 0x01) {
+ ret = -1;
+ }
+
+ /* de-select the NAND device */
+ this->select_chip(meminfo, -1);
+ return ret;
+}
+
+/**
+ * nand_get_lock_status: - query current lock state from one page of NAND
+ * flash
+ *
+ * @param meminfo nand mtd instance
+ * @param offset page address to query (muss be page aligned!)
+ *
+ * @return -1 in case of error
+ * >0 lock status:
+ * bitfield with the following combinations:
+ * NAND_LOCK_STATUS_TIGHT: page in tight state
+ * NAND_LOCK_STATUS_LOCK: page locked
+ * NAND_LOCK_STATUS_UNLOCK: page unlocked
+ *
+ */
+int nand_get_lock_status(nand_info_t *meminfo, ulong offset)
+{
+ int ret = 0;
+ int chipnr;
+ int page;
+ struct nand_chip *this = meminfo->priv;
+
+ /* select the NAND device */
+ chipnr = (int)(offset >> this->chip_shift);
+ this->select_chip(meminfo, chipnr);
+
+
+ if ((offset & (meminfo->oobblock - 1)) != 0) {
+ printf ("nand_get_lock_status: "
+ "Start address must be beginning of "
+ "nand page!\n");
+ ret = -1;
+ goto out;
+ }
+
+ /* check the Lock Status */
+ page = (int)(offset >> this->page_shift);
+ this->cmdfunc(meminfo, NAND_CMD_LOCK_STATUS, -1, page & this->pagemask);
+
+ ret = this->read_byte(meminfo) & (NAND_LOCK_STATUS_TIGHT
+ | NAND_LOCK_STATUS_LOCK
+ | NAND_LOCK_STATUS_UNLOCK);
+
+ out:
+ /* de-select the NAND device */
+ this->select_chip(meminfo, -1);
+ return ret;
+}
+
+/**
+ * nand_unlock: - Unlock area of NAND pages
+ * only one consecutive area can be unlocked at one time!
+ *
+ * @param meminfo nand mtd instance
+ * @param start start byte address
+ * @param length number of bytes to unlock (must be a multiple of
+ * page size nand->oobblock)
+ *
+ * @return 0 on success, -1 in case of error
+ */
+int nand_unlock(nand_info_t *meminfo, ulong start, ulong length)
+{
+ int ret = 0;
+ int chipnr;
+ int status;
+ int page;
+ struct nand_chip *this = meminfo->priv;
+ printf ("nand_unlock: start: %08x, length: %d!\n",
+ (int)start, (int)length);
+
+ /* select the NAND device */
+ chipnr = (int)(start >> this->chip_shift);
+ this->select_chip(meminfo, chipnr);
+
+ /* check the WP bit */
+ this->cmdfunc(meminfo, NAND_CMD_STATUS, -1, -1);
+ if ((this->read_byte(meminfo) & 0x80) == 0) {
+ printf ("nand_unlock: Device is write protected!\n");
+ ret = -1;
+ goto out;
+ }
+
+ if ((start & (meminfo->oobblock - 1)) != 0) {
+ printf ("nand_unlock: Start address must be beginning of "
+ "nand page!\n");
+ ret = -1;
+ goto out;
+ }
+
+ if (length == 0 || (length & (meminfo->oobblock - 1)) != 0) {
+ printf ("nand_unlock: Length must be a multiple of nand page "
+ "size!\n");
+ ret = -1;
+ goto out;
+ }
+
+ /* submit address of first page to unlock */
+ page = (int)(start >> this->page_shift);
+ this->cmdfunc(meminfo, NAND_CMD_UNLOCK1, -1, page & this->pagemask);
+
+ /* submit ADDRESS of LAST page to unlock */
+ page += (int)(length >> this->page_shift) - 1;
+ this->cmdfunc(meminfo, NAND_CMD_UNLOCK2, -1, page & this->pagemask);
+
+ /* call wait ready function */
+ status = this->waitfunc(meminfo, this, FL_WRITING);
+ /* see if device thinks it succeeded */
+ if (status & 0x01) {
+ /* there was an error */
+ ret = -1;
+ goto out;
+ }
+
+ out:
+ /* de-select the NAND device */
+ this->select_chip(meminfo, -1);
+ return ret;
+}
+
diff --git a/drivers/nand/Kconfig b/drivers/nand/Kconfig
deleted file mode 100644
index 031b94d..0000000
--- a/drivers/nand/Kconfig
+++ /dev/null
@@ -1,109 +0,0 @@
-menuconfig NAND
- bool "NAND support "
- select MTD_NAND_IDS
- help
- This enables support for accessing all type of NAND flash
- devices. For further information see
- <http://www.linux-mtd.infradead.org/doc/nand.html>.
-
-if NAND
-
-config NAND_IMX
- bool
- prompt "i.MX NAND driver"
- depends on ARCH_IMX21 || ARCH_IMX27 || ARCH_IMX31 || ARCH_IMX35 || ARCH_IMX25
-
-config NAND_IMX_BOOT
- bool
- prompt "Support Starting barebox from NAND"
- depends on NAND_IMX || NAND_IMX_V2
-
-config NAND_OMAP_GPMC
- tristate "NAND Flash Support for GPMC based OMAP platforms"
- depends on ((ARCH_OMAP2 || ARCH_OMAP3) && GPMC)
- help
- Support for NAND flash using GPMC. GPMC is a common memory
- interface found on Texas Instrument's OMAP platforms
-
-config NAND_OMAP_GPMC_HWECC
- bool "The Hardware ECC support"
- depends on NAND && NAND_OMAP_GPMC
- default n
- help
- The ECC compuatation for the data to be written/read can be either by
- software or omap has Hw ecc engine which calculates it.
-
-config NAND_ATMEL
- bool
- prompt "Atmel (AT91SAM9xxx) NAND driver"
- depends on ARCH_AT91
-
-config NAND_S3C24X0
- bool
- prompt "Samsung S3C24X0 NAND driver"
- depends on ARCH_S3C24xx
- help
- Add support for processor's NAND device controller.
-
-config MTD_NAND_VERIFY_WRITE
- bool "Verify NAND page writes"
- help
- This adds an extra check when data is written to the flash. The
- NAND flash device internally checks only bits transitioning
- from 1 to 0. There is a rare possibility that even though the
- device thinks the write was successful, a bit could have been
- flipped accidentally due to device wear or something else.
-
-config MTD_NAND_ECC_SMC
- bool "NAND ECC Smart Media byte order"
- default n
- help
- Software ECC according to the Smart Media Specification.
- The original Linux implementation had byte 0 and 1 swapped.
-
-config MTD_NAND_MUSEUM_IDS
- bool "Enable chip ids for obsolete ancient NAND devices"
- depends on MTD_NAND
- default n
- help
- Enable this option only when your board has first generation
- NAND chips (page size 256 byte, erase size 4-8KiB). The IDs
- of these chips were reused by later, larger chips.
-
-config MTD_NAND_IDS
- tristate
-
-config MTD_NAND_DISKONCHIP
- tristate "DiskOnChip 2000, Millennium and Millennium Plus"
- depends on EXPERIMENTAL && BROKEN
- help
- This is a reimplementation of M-Systems DiskOnChip 2000,
- Millennium and Millennium Plus as a standard NAND device driver,
- as opposed to the earlier self-contained MTD device drivers.
- This should enable, among other things, proper JFFS2 operation on
- these devices.
-
-config MTD_NAND_DISKONCHIP_BBTWRITE
- bool "Allow BBT writes on DiskOnChip Millennium and 2000TSOP"
- depends on MTD_NAND_DISKONCHIP
- help
- On DiskOnChip devices shipped with the INFTL filesystem (Millennium
- and 2000 TSOP/Alon), Linux reserves some space at the end of the
- device for the Bad Block Table (BBT). If you have existing INFTL
- data on your device (created by non-Linux tools such as M-Systems'
- DOS drivers), your data might overlap the area Linux wants to use for
- the BBT. If this is a concern for you, leave this option disabled and
- Linux will not write BBT data into this area.
- The downside of leaving this option disabled is that if bad blocks
- are detected by Linux, they will not be recorded in the BBT, which
- could cause future problems.
- Once you enable this option, new filesystems (INFTL or others, created
- in Linux or other operating systems) will not use the reserved area.
- The only reason not to enable this option is to prevent damage to
- preexisting filesystems.
- Even if you leave this disabled, you can enable BBT writes at module
- load time (assuming you build diskonchip as a module) with the module
- parameter "inftl_bbt_write=1".
-
-
-endif
diff --git a/drivers/nand/Makefile b/drivers/nand/Makefile
deleted file mode 100644
index 73f7346..0000000
--- a/drivers/nand/Makefile
+++ /dev/null
@@ -1,12 +0,0 @@
-
-# Generic NAND options
-obj-$(CONFIG_NAND) += nand.o nand_ecc.o
-obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.o
-obj-$(CONFIG_NAND) += nand_base.o nand_bbt.o
-
-obj-$(CONFIG_MTD_NAND_DISKONCHIP) += diskonchip.o
-obj-$(CONFIG_NAND_IMX) += nand_imx.o
-obj-$(CONFIG_NAND_OMAP_GPMC) += nand_omap_gpmc.o
-obj-$(CONFIG_NAND_ATMEL) += atmel_nand.o
-obj-$(CONFIG_NAND_S3C24X0) += nand_s3c2410.o
-#obj-$(CONFIG_NAND) += nand_util.o
diff --git a/drivers/nand/atmel_nand.c b/drivers/nand/atmel_nand.c
deleted file mode 100644
index c3669e5..0000000
--- a/drivers/nand/atmel_nand.c
+++ /dev/null
@@ -1,516 +0,0 @@
-/*
- * Copyright (C) 2003 Rick Bronson
- *
- * Derived from drivers/mtd/nand/autcpu12.c
- * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
- *
- * Derived from drivers/mtd/spia.c
- * Copyright (C) 2000 Steven J. Hill (sjhill@cotw.com)
- *
- *
- * Add Hardware ECC support for AT91SAM9260 / AT91SAM9263
- * Richard Genoud (richard.genoud@gmail.com), Adeneo Copyright (C) 2007
- *
- * Derived from Das barebox source code
- * (barebox-1.1.5/board/atmel/at91sam9263ek/nand.c)
- * (C) Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas
- *
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-
-#include <common.h>
-#include <driver.h>
-#include <malloc.h>
-#include <init.h>
-#include <gpio.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-
-#include <asm/io.h>
-#include <mach/board.h>
-
-#include <errno.h>
-
-#ifdef CONFIG_MTD_NAND_ATMEL_ECC_HW
-#define hard_ecc 1
-#else
-#define hard_ecc 0
-#endif
-
-#ifdef CONFIG_MTD_NAND_ATMEL_ECC_NONE
-#define no_ecc 1
-#else
-#define no_ecc 0
-#endif
-
-/* Register access macros */
-#define ecc_readl(add, reg) \
- readl(add + ATMEL_ECC_##reg)
-#define ecc_writel(add, reg, value) \
- writel((value), add + ATMEL_ECC_##reg)
-
-#include "atmel_nand_ecc.h" /* Hardware ECC registers */
-
-/* oob layout for large page size
- * bad block info is on bytes 0 and 1
- * the bytes have to be consecutives to avoid
- * several NAND_CMD_RNDOUT during read
- */
-static struct nand_ecclayout atmel_oobinfo_large = {
- .eccbytes = 4,
- .eccpos = {60, 61, 62, 63},
- .oobfree = {
- {2, 58}
- },
-};
-
-/* oob layout for small page size
- * bad block info is on bytes 4 and 5
- * the bytes have to be consecutives to avoid
- * several NAND_CMD_RNDOUT during read
- */
-static struct nand_ecclayout atmel_oobinfo_small = {
- .eccbytes = 4,
- .eccpos = {0, 1, 2, 3},
- .oobfree = {
- {6, 10}
- },
-};
-
-struct atmel_nand_host {
- struct nand_chip nand_chip;
- struct mtd_info mtd;
- void __iomem *io_base;
- struct atmel_nand_data *board;
- struct device_d *dev;
- void __iomem *ecc;
-};
-
-/*
- * Enable NAND.
- */
-static void atmel_nand_enable(struct atmel_nand_host *host)
-{
- if (host->board->enable_pin)
- gpio_set_value(host->board->enable_pin, 0);
-}
-
-/*
- * Disable NAND.
- */
-static void atmel_nand_disable(struct atmel_nand_host *host)
-{
- if (host->board->enable_pin)
- gpio_set_value(host->board->enable_pin, 1);
-}
-
-/*
- * Hardware specific access to control-lines
- */
-static void atmel_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct atmel_nand_host *host = nand_chip->priv;
-
- if (ctrl & NAND_CTRL_CHANGE) {
- if (ctrl & NAND_NCE)
- atmel_nand_enable(host);
- else
- atmel_nand_disable(host);
- }
- if (cmd == NAND_CMD_NONE)
- return;
-
- if (ctrl & NAND_CLE)
- writeb(cmd, host->io_base + (1 << host->board->cle));
- else
- writeb(cmd, host->io_base + (1 << host->board->ale));
-}
-
-/*
- * Read the Device Ready pin.
- */
-static int atmel_nand_device_ready(struct mtd_info *mtd)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct atmel_nand_host *host = nand_chip->priv;
-
- return gpio_get_value(host->board->rdy_pin);
-}
-
-/*
- * Minimal-overhead PIO for data access.
- */
-static void atmel_read_buf(struct mtd_info *mtd, u8 *buf, int len)
-{
- struct nand_chip *nand_chip = mtd->priv;
-
- readsb(nand_chip->IO_ADDR_R, buf, len);
-}
-
-static void atmel_read_buf16(struct mtd_info *mtd, u8 *buf, int len)
-{
- struct nand_chip *nand_chip = mtd->priv;
-
- readsw(nand_chip->IO_ADDR_R, buf, len / 2);
-}
-
-static void atmel_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
-{
- struct nand_chip *nand_chip = mtd->priv;
-
- writesb(nand_chip->IO_ADDR_W, buf, len);
-}
-
-static void atmel_write_buf16(struct mtd_info *mtd, const u8 *buf, int len)
-{
- struct nand_chip *nand_chip = mtd->priv;
-
- writesw(nand_chip->IO_ADDR_W, buf, len / 2);
-}
-
-/*
- * Calculate HW ECC
- *
- * function called after a write
- *
- * mtd: MTD block structure
- * dat: raw data (unused)
- * ecc_code: buffer for ECC
- */
-static int atmel_nand_calculate(struct mtd_info *mtd,
- const u_char *dat, unsigned char *ecc_code)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct atmel_nand_host *host = nand_chip->priv;
-/* uint32_t *eccpos = nand_chip->ecc.layout->eccpos; */
- unsigned int ecc_value;
-
- /* get the first 2 ECC bytes */
- ecc_value = ecc_readl(host->ecc, PR);
-
- ecc_code[0] = ecc_value & 0xFF;
- ecc_code[1] = (ecc_value >> 8) & 0xFF;
-
- /* get the last 2 ECC bytes */
- ecc_value = ecc_readl(host->ecc, NPR) & ATMEL_ECC_NPARITY;
-
- ecc_code[2] = ecc_value & 0xFF;
- ecc_code[3] = (ecc_value >> 8) & 0xFF;
-
- return 0;
-}
-
-/*
- * HW ECC read page function
- *
- * mtd: mtd info structure
- * chip: nand chip info structure
- * buf: buffer to store read data
- */
-static int atmel_nand_read_page(struct mtd_info *mtd,
- struct nand_chip *chip, uint8_t *buf)
-{
- int eccsize = chip->ecc.size;
- int eccbytes = chip->ecc.bytes;
- uint32_t *eccpos = chip->ecc.layout->eccpos;
- uint8_t *p = buf;
- uint8_t *oob = chip->oob_poi;
- uint8_t *ecc_pos;
- int stat;
-
- /*
- * Errata: ALE is incorrectly wired up to the ECC controller
- * on the AP7000, so it will include the address cycles in the
- * ECC calculation.
- *
- * Workaround: Reset the parity registers before reading the
- * actual data.
- */
-#if 0
- if (cpu_is_at32ap7000()) {
- struct atmel_nand_host *host = chip->priv;
- ecc_writel(host->ecc, CR, ATMEL_ECC_RST);
- }
-#endif
-
- /* read the page */
- chip->read_buf(mtd, p, eccsize);
-
- /* move to ECC position if needed */
- if (eccpos[0] != 0) {
- /* This only works on large pages
- * because the ECC controller waits for
- * NAND_CMD_RNDOUTSTART after the
- * NAND_CMD_RNDOUT.
- * anyway, for small pages, the eccpos[0] == 0
- */
- chip->cmdfunc(mtd, NAND_CMD_RNDOUT,
- mtd->writesize + eccpos[0], -1);
- }
-
- /* the ECC controller needs to read the ECC just after the data */
- ecc_pos = oob + eccpos[0];
- chip->read_buf(mtd, ecc_pos, eccbytes);
-
- /* check if there's an error */
- stat = chip->ecc.correct(mtd, p, oob, NULL);
-
- if (stat < 0)
- mtd->ecc_stats.failed++;
- else
- mtd->ecc_stats.corrected += stat;
-
- /* get back to oob start (end of page) */
- chip->cmdfunc(mtd, NAND_CMD_RNDOUT, mtd->writesize, -1);
-
- /* read the oob */
- chip->read_buf(mtd, oob, mtd->oobsize);
-
- return 0;
-}
-
-/*
- * HW ECC Correction
- *
- * function called after a read
- *
- * mtd: MTD block structure
- * dat: raw data read from the chip
- * read_ecc: ECC from the chip (unused)
- * isnull: unused
- *
- * Detect and correct a 1 bit error for a page
- */
-static int atmel_nand_correct(struct mtd_info *mtd, u_char *dat,
- u_char *read_ecc, u_char *isnull)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct atmel_nand_host *host = nand_chip->priv;
- unsigned int ecc_status;
- unsigned int ecc_word, ecc_bit;
-
- /* get the status from the Status Register */
- ecc_status = ecc_readl(host->ecc, SR);
-
- /* if there's no error */
- if (likely(!(ecc_status & ATMEL_ECC_RECERR)))
- return 0;
-
- /* get error bit offset (4 bits) */
- ecc_bit = ecc_readl(host->ecc, PR) & ATMEL_ECC_BITADDR;
- /* get word address (12 bits) */
- ecc_word = ecc_readl(host->ecc, PR) & ATMEL_ECC_WORDADDR;
- ecc_word >>= 4;
-
- /* if there are multiple errors */
- if (ecc_status & ATMEL_ECC_MULERR) {
- /* check if it is a freshly erased block
- * (filled with 0xff) */
- if ((ecc_bit == ATMEL_ECC_BITADDR)
- && (ecc_word == (ATMEL_ECC_WORDADDR >> 4))) {
- /* the block has just been erased, return OK */
- return 0;
- }
- /* it doesn't seems to be a freshly
- * erased block.
- * We can't correct so many errors */
- dev_dbg(host->dev, "atmel_nand : multiple errors detected."
- " Unable to correct.\n");
- return -EIO;
- }
-
- /* if there's a single bit error : we can correct it */
- if (ecc_status & ATMEL_ECC_ECCERR) {
- /* there's nothing much to do here.
- * the bit error is on the ECC itself.
- */
- dev_dbg(host->dev, "atmel_nand : one bit error on ECC code."
- " Nothing to correct\n");
- return 0;
- }
-
- dev_dbg(host->dev, "atmel_nand : one bit error on data."
- " (word offset in the page :"
- " 0x%x bit offset : 0x%x)\n",
- ecc_word, ecc_bit);
- /* correct the error */
- if (nand_chip->options & NAND_BUSWIDTH_16) {
- /* 16 bits words */
- ((unsigned short *) dat)[ecc_word] ^= (1 << ecc_bit);
- } else {
- /* 8 bits words */
- dat[ecc_word] ^= (1 << ecc_bit);
- }
- dev_dbg(host->dev, "atmel_nand : error corrected\n");
- return 1;
-}
-
-/*
- * Enable HW ECC : unused on most chips
- */
-static void atmel_nand_hwctl(struct mtd_info *mtd, int mode)
-{
-#if 0
- if (cpu_is_at32ap7000()) {
- struct nand_chip *nand_chip = mtd->priv;
- struct atmel_nand_host *host = nand_chip->priv;
- ecc_writel(host->ecc, CR, ATMEL_ECC_RST);
- }
-#endif
-}
-
-/*
- * Probe for the NAND device.
- */
-static int __init atmel_nand_probe(struct device_d *dev)
-{
- struct atmel_nand_data *pdata = dev->platform_data;
- struct atmel_nand_host *host;
- struct mtd_info *mtd;
- struct nand_chip *nand_chip;
- int res = 0;
-
- /* Allocate memory for the device structure (and zero it) */
- host = kzalloc(sizeof(struct atmel_nand_host), GFP_KERNEL);
- if (!host)
- return -ENOMEM;
-
- host->io_base = (void __iomem *)dev->map_base;
-
- mtd = &host->mtd;
- nand_chip = &host->nand_chip;
- host->board = pdata;
- host->dev = dev;
-
- nand_chip->priv = host; /* link the private data structures */
- mtd->priv = nand_chip;
-
- /* Set address of NAND IO lines */
- nand_chip->IO_ADDR_R = host->io_base;
- nand_chip->IO_ADDR_W = host->io_base;
- nand_chip->cmd_ctrl = atmel_nand_cmd_ctrl;
-
- if (host->board->rdy_pin)
- nand_chip->dev_ready = atmel_nand_device_ready;
-
- nand_chip->ecc.mode = pdata->ecc_mode;
-
- if (pdata->ecc_mode == NAND_ECC_HW) {
- if (!pdata->ecc_base)
- return -ENODEV;
-
- host->ecc = pdata->ecc_base;
-
- nand_chip->ecc.mode = NAND_ECC_HW;
- nand_chip->ecc.calculate = atmel_nand_calculate;
- nand_chip->ecc.correct = atmel_nand_correct;
- nand_chip->ecc.hwctl = atmel_nand_hwctl;
- nand_chip->ecc.read_page = atmel_nand_read_page;
- nand_chip->ecc.bytes = 4;
- }
-
- nand_chip->chip_delay = 20; /* 20us command delay time */
-
- if (host->board->bus_width_16) { /* 16-bit bus width */
- nand_chip->options |= NAND_BUSWIDTH_16;
- nand_chip->read_buf = atmel_read_buf16;
- nand_chip->write_buf = atmel_write_buf16;
- } else {
- nand_chip->read_buf = atmel_read_buf;
- nand_chip->write_buf = atmel_write_buf;
- }
-
- atmel_nand_enable(host);
-
- if (host->board->det_pin) {
- if (gpio_get_value(host->board->det_pin)) {
- printk("No SmartMedia card inserted.\n");
- res = ENXIO;
- goto err_no_card;
- }
- }
-
- /* first scan to find the device and get the page size */
- if (nand_scan_ident(mtd, 1)) {
- res = -ENXIO;
- goto err_scan_ident;
- }
-
- if (nand_chip->ecc.mode == NAND_ECC_HW) {
- /* ECC is calculated for the whole page (1 step) */
- nand_chip->ecc.size = mtd->writesize;
-
- /* set ECC page size and oob layout */
- switch (mtd->writesize) {
- case 512:
- nand_chip->ecc.layout = &atmel_oobinfo_small;
- ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_528);
- break;
- case 1024:
- nand_chip->ecc.layout = &atmel_oobinfo_large;
- ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_1056);
- break;
- case 2048:
- nand_chip->ecc.layout = &atmel_oobinfo_large;
- ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_2112);
- break;
- case 4096:
- nand_chip->ecc.layout = &atmel_oobinfo_large;
- ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_4224);
- break;
- default:
- /* page size not handled by HW ECC */
- /* switching back to soft ECC */
- nand_chip->ecc.mode = NAND_ECC_SOFT;
- nand_chip->ecc.calculate = NULL;
- nand_chip->ecc.correct = NULL;
- nand_chip->ecc.hwctl = NULL;
- nand_chip->ecc.read_page = NULL;
- nand_chip->ecc.postpad = 0;
- nand_chip->ecc.prepad = 0;
- nand_chip->ecc.bytes = 0;
- break;
- }
- }
-
- /* second phase scan */
- if (nand_scan_tail(mtd)) {
- res = -ENXIO;
- goto err_scan_tail;
- }
-
- add_mtd_device(mtd);
-
- if (!res)
- return res;
-
- nand_release(mtd);
-err_scan_tail:
-err_scan_ident:
-err_no_card:
- atmel_nand_disable(host);
- kfree(host);
- return res;
-}
-
-static struct driver_d atmel_nand_driver = {
- .name = "atmel_nand",
- .probe = atmel_nand_probe,
-};
-
-static int __init atmel_nand_init(void)
-{
- return register_driver(&atmel_nand_driver);
-}
-
-device_initcall(atmel_nand_init);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Rick Bronson");
-MODULE_DESCRIPTION("NAND/SmartMedia driver for AT91 / AVR32");
diff --git a/drivers/nand/atmel_nand_ecc.h b/drivers/nand/atmel_nand_ecc.h
deleted file mode 100644
index 578c776..0000000
--- a/drivers/nand/atmel_nand_ecc.h
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Error Corrected Code Controller (ECC) - System peripherals regsters.
- * Based on AT91SAM9260 datasheet revision B.
- *
- * Copyright (C) 2007 Andrew Victor
- * Copyright (C) 2007 Atmel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#ifndef ATMEL_NAND_ECC_H
-#define ATMEL_NAND_ECC_H
-
-#define ATMEL_ECC_CR 0x00 /* Control register */
-#define ATMEL_ECC_RST (1 << 0) /* Reset parity */
-
-#define ATMEL_ECC_MR 0x04 /* Mode register */
-#define ATMEL_ECC_PAGESIZE (3 << 0) /* Page Size */
-#define ATMEL_ECC_PAGESIZE_528 (0)
-#define ATMEL_ECC_PAGESIZE_1056 (1)
-#define ATMEL_ECC_PAGESIZE_2112 (2)
-#define ATMEL_ECC_PAGESIZE_4224 (3)
-
-#define ATMEL_ECC_SR 0x08 /* Status register */
-#define ATMEL_ECC_RECERR (1 << 0) /* Recoverable Error */
-#define ATMEL_ECC_ECCERR (1 << 1) /* ECC Single Bit Error */
-#define ATMEL_ECC_MULERR (1 << 2) /* Multiple Errors */
-
-#define ATMEL_ECC_PR 0x0c /* Parity register */
-#define ATMEL_ECC_BITADDR (0xf << 0) /* Bit Error Address */
-#define ATMEL_ECC_WORDADDR (0xfff << 4) /* Word Error Address */
-
-#define ATMEL_ECC_NPR 0x10 /* NParity register */
-#define ATMEL_ECC_NPARITY (0xffff << 0) /* NParity */
-
-#endif
diff --git a/drivers/nand/diskonchip.c b/drivers/nand/diskonchip.c
deleted file mode 100644
index e762524..0000000
--- a/drivers/nand/diskonchip.c
+++ /dev/null
@@ -1,1787 +0,0 @@
-/*
- * drivers/mtd/nand/diskonchip.c
- *
- * (C) 2003 Red Hat, Inc.
- * (C) 2004 Dan Brown <dan_brown@ieee.org>
- * (C) 2004 Kalev Lember <kalev@smartlink.ee>
- *
- * Author: David Woodhouse <dwmw2@infradead.org>
- * Additional Diskonchip 2000 and Millennium support by Dan Brown <dan_brown@ieee.org>
- * Diskonchip Millennium Plus support by Kalev Lember <kalev@smartlink.ee>
- *
- * Error correction code lifted from the old docecc code
- * Author: Fabrice Bellard (fabrice.bellard@netgem.com)
- * Copyright (C) 2000 Netgem S.A.
- * converted to the generic Reed-Solomon library by Thomas Gleixner <tglx@linutronix.de>
- *
- * Interface to generic NAND code for M-Systems DiskOnChip devices
- *
- * $Id: diskonchip.c,v 1.45 2005/01/05 18:05:14 dwmw2 Exp $
- */
-
-#include <common.h>
-
-#if !defined(CFG_NAND_LEGACY)
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/delay.h>
-#include <linux/rslib.h>
-#include <linux/moduleparam.h>
-#include <asm/io.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/doc2000.h>
-#include <linux/mtd/compatmac.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/inftl.h>
-
-/* Where to look for the devices? */
-#ifndef CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS
-#define CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS 0
-#endif
-
-static unsigned long __initdata doc_locations[] = {
-#if defined (__alpha__) || defined(__i386__) || defined(__x86_64__)
-#ifdef CONFIG_MTD_DISKONCHIP_PROBE_HIGH
- 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000,
- 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000,
- 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000,
- 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000,
- 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000,
-#else /* CONFIG_MTD_DOCPROBE_HIGH */
- 0xc8000, 0xca000, 0xcc000, 0xce000,
- 0xd0000, 0xd2000, 0xd4000, 0xd6000,
- 0xd8000, 0xda000, 0xdc000, 0xde000,
- 0xe0000, 0xe2000, 0xe4000, 0xe6000,
- 0xe8000, 0xea000, 0xec000, 0xee000,
-#endif /* CONFIG_MTD_DOCPROBE_HIGH */
-#elif defined(__PPC__)
- 0xe4000000,
-#elif defined(CONFIG_MOMENCO_OCELOT)
- 0x2f000000,
- 0xff000000,
-#elif defined(CONFIG_MOMENCO_OCELOT_G) || defined (CONFIG_MOMENCO_OCELOT_C)
- 0xff000000,
-##else
-#warning Unknown architecture for DiskOnChip. No default probe locations defined
-#endif
- 0xffffffff };
-
-static struct mtd_info *doclist = NULL;
-
-struct doc_priv {
- void __iomem *virtadr;
- unsigned long physadr;
- u_char ChipID;
- u_char CDSNControl;
- int chips_per_floor; /* The number of chips detected on each floor */
- int curfloor;
- int curchip;
- int mh0_page;
- int mh1_page;
- struct mtd_info *nextdoc;
-};
-
-/* Max number of eraseblocks to scan (from start of device) for the (I)NFTL
- MediaHeader. The spec says to just keep going, I think, but that's just
- silly. */
-#define MAX_MEDIAHEADER_SCAN 8
-
-/* This is the syndrome computed by the HW ecc generator upon reading an empty
- page, one with all 0xff for data and stored ecc code. */
-static u_char empty_read_syndrome[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a };
-/* This is the ecc value computed by the HW ecc generator upon writing an empty
- page, one with all 0xff for data. */
-static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 };
-
-#define INFTL_BBT_RESERVED_BLOCKS 4
-
-#define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32)
-#define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil)
-#define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k)
-
-static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd);
-static void doc200x_select_chip(struct mtd_info *mtd, int chip);
-
-static int debug=0;
-module_param(debug, int, 0);
-
-static int try_dword=1;
-module_param(try_dword, int, 0);
-
-static int no_ecc_failures=0;
-module_param(no_ecc_failures, int, 0);
-
-#ifdef CONFIG_MTD_PARTITIONS
-static int no_autopart=0;
-module_param(no_autopart, int, 0);
-#endif
-
-#ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE
-static int inftl_bbt_write=1;
-#else
-static int inftl_bbt_write=0;
-#endif
-module_param(inftl_bbt_write, int, 0);
-
-static unsigned long doc_config_location = CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS;
-module_param(doc_config_location, ulong, 0);
-MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip");
-
-
-/* Sector size for HW ECC */
-#define SECTOR_SIZE 512
-/* The sector bytes are packed into NB_DATA 10 bit words */
-#define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10)
-/* Number of roots */
-#define NROOTS 4
-/* First consective root */
-#define FCR 510
-/* Number of symbols */
-#define NN 1023
-
-/* the Reed Solomon control structure */
-static struct rs_control *rs_decoder;
-
-/*
- * The HW decoder in the DoC ASIC's provides us a error syndrome,
- * which we must convert to a standard syndrom usable by the generic
- * Reed-Solomon library code.
- *
- * Fabrice Bellard figured this out in the old docecc code. I added
- * some comments, improved a minor bit and converted it to make use
- * of the generic Reed-Solomon libary. tglx
- */
-static int doc_ecc_decode (struct rs_control *rs, uint8_t *data, uint8_t *ecc)
-{
- int i, j, nerr, errpos[8];
- uint8_t parity;
- uint16_t ds[4], s[5], tmp, errval[8], syn[4];
-
- /* Convert the ecc bytes into words */
- ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8);
- ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6);
- ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4);
- ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2);
- parity = ecc[1];
-
- /* Initialize the syndrom buffer */
- for (i = 0; i < NROOTS; i++)
- s[i] = ds[0];
- /*
- * Evaluate
- * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0]
- * where x = alpha^(FCR + i)
- */
- for(j = 1; j < NROOTS; j++) {
- if(ds[j] == 0)
- continue;
- tmp = rs->index_of[ds[j]];
- for(i = 0; i < NROOTS; i++)
- s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)];
- }
-
- /* Calc s[i] = s[i] / alpha^(v + i) */
- for (i = 0; i < NROOTS; i++) {
- if (syn[i])
- syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i));
- }
- /* Call the decoder library */
- nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval);
-
- /* Incorrectable errors ? */
- if (nerr < 0)
- return nerr;
-
- /*
- * Correct the errors. The bitpositions are a bit of magic,
- * but they are given by the design of the de/encoder circuit
- * in the DoC ASIC's.
- */
- for(i = 0;i < nerr; i++) {
- int index, bitpos, pos = 1015 - errpos[i];
- uint8_t val;
- if (pos >= NB_DATA && pos < 1019)
- continue;
- if (pos < NB_DATA) {
- /* extract bit position (MSB first) */
- pos = 10 * (NB_DATA - 1 - pos) - 6;
- /* now correct the following 10 bits. At most two bytes
- can be modified since pos is even */
- index = (pos >> 3) ^ 1;
- bitpos = pos & 7;
- if ((index >= 0 && index < SECTOR_SIZE) ||
- index == (SECTOR_SIZE + 1)) {
- val = (uint8_t) (errval[i] >> (2 + bitpos));
- parity ^= val;
- if (index < SECTOR_SIZE)
- data[index] ^= val;
- }
- index = ((pos >> 3) + 1) ^ 1;
- bitpos = (bitpos + 10) & 7;
- if (bitpos == 0)
- bitpos = 8;
- if ((index >= 0 && index < SECTOR_SIZE) ||
- index == (SECTOR_SIZE + 1)) {
- val = (uint8_t)(errval[i] << (8 - bitpos));
- parity ^= val;
- if (index < SECTOR_SIZE)
- data[index] ^= val;
- }
- }
- }
- /* If the parity is wrong, no rescue possible */
- return parity ? -1 : nerr;
-}
-
-static void DoC_Delay(struct doc_priv *doc, unsigned short cycles)
-{
- volatile char dummy;
- int i;
-
- for (i = 0; i < cycles; i++) {
- if (DoC_is_Millennium(doc))
- dummy = ReadDOC(doc->virtadr, NOP);
- else if (DoC_is_MillenniumPlus(doc))
- dummy = ReadDOC(doc->virtadr, Mplus_NOP);
- else
- dummy = ReadDOC(doc->virtadr, DOCStatus);
- }
-
-}
-
-#define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1)
-
-/* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */
-static int _DoC_WaitReady(struct doc_priv *doc)
-{
- void __iomem *docptr = doc->virtadr;
- unsigned long timeo = jiffies + (HZ * 10);
-
- if(debug) printk("_DoC_WaitReady...\n");
- /* Out-of-line routine to wait for chip response */
- if (DoC_is_MillenniumPlus(doc)) {
- while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) {
- if (time_after(jiffies, timeo)) {
- printk("_DoC_WaitReady timed out.\n");
- return -EIO;
- }
- udelay(1);
- cond_resched();
- }
- } else {
- while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) {
- if (time_after(jiffies, timeo)) {
- printk("_DoC_WaitReady timed out.\n");
- return -EIO;
- }
- udelay(1);
- cond_resched();
- }
- }
-
- return 0;
-}
-
-static inline int DoC_WaitReady(struct doc_priv *doc)
-{
- void __iomem *docptr = doc->virtadr;
- int ret = 0;
-
- if (DoC_is_MillenniumPlus(doc)) {
- DoC_Delay(doc, 4);
-
- if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK)
- /* Call the out-of-line routine to wait */
- ret = _DoC_WaitReady(doc);
- } else {
- DoC_Delay(doc, 4);
-
- if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B))
- /* Call the out-of-line routine to wait */
- ret = _DoC_WaitReady(doc);
- DoC_Delay(doc, 2);
- }
-
- if(debug) printk("DoC_WaitReady OK\n");
- return ret;
-}
-
-static void doc2000_write_byte(struct mtd_info *mtd, u_char datum)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- if(debug)printk("write_byte %02x\n", datum);
- WriteDOC(datum, docptr, CDSNSlowIO);
- WriteDOC(datum, docptr, 2k_CDSN_IO);
-}
-
-static u_char doc2000_read_byte(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- u_char ret;
-
- ReadDOC(docptr, CDSNSlowIO);
- DoC_Delay(doc, 2);
- ret = ReadDOC(docptr, 2k_CDSN_IO);
- if (debug) printk("read_byte returns %02x\n", ret);
- return ret;
-}
-
-static void doc2000_writebuf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
- if (debug)printk("writebuf of %d bytes: ", len);
- for (i=0; i < len; i++) {
- WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i);
- if (debug && i < 16)
- printk("%02x ", buf[i]);
- }
- if (debug) printk("\n");
-}
-
-static void doc2000_readbuf(struct mtd_info *mtd,
- u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- if (debug)printk("readbuf of %d bytes: ", len);
-
- for (i=0; i < len; i++) {
- buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i);
- }
-}
-
-static void doc2000_readbuf_dword(struct mtd_info *mtd,
- u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- if (debug) printk("readbuf_dword of %d bytes: ", len);
-
- if (unlikely((((unsigned long)buf)|len) & 3)) {
- for (i=0; i < len; i++) {
- *(uint8_t *)(&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i);
- }
- } else {
- for (i=0; i < len; i+=4) {
- *(uint32_t*)(&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i);
- }
- }
-}
-
-static int doc2000_verifybuf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- for (i=0; i < len; i++)
- if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO))
- return -EFAULT;
- return 0;
-}
-
-static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- uint16_t ret;
-
- doc200x_select_chip(mtd, nr);
- doc200x_hwcontrol(mtd, NAND_CTL_SETCLE);
- this->write_byte(mtd, NAND_CMD_READID);
- doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE);
- doc200x_hwcontrol(mtd, NAND_CTL_SETALE);
- this->write_byte(mtd, 0);
- doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
-
- ret = this->read_byte(mtd) << 8;
- ret |= this->read_byte(mtd);
-
- if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) {
- /* First chip probe. See if we get same results by 32-bit access */
- union {
- uint32_t dword;
- uint8_t byte[4];
- } ident;
- void __iomem *docptr = doc->virtadr;
-
- doc200x_hwcontrol(mtd, NAND_CTL_SETCLE);
- doc2000_write_byte(mtd, NAND_CMD_READID);
- doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE);
- doc200x_hwcontrol(mtd, NAND_CTL_SETALE);
- doc2000_write_byte(mtd, 0);
- doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
-
- ident.dword = readl(docptr + DoC_2k_CDSN_IO);
- if (((ident.byte[0] << 8) | ident.byte[1]) == ret) {
- printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n");
- this->read_buf = &doc2000_readbuf_dword;
- }
- }
-
- return ret;
-}
-
-static void __init doc2000_count_chips(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- uint16_t mfrid;
- int i;
-
- /* Max 4 chips per floor on DiskOnChip 2000 */
- doc->chips_per_floor = 4;
-
- /* Find out what the first chip is */
- mfrid = doc200x_ident_chip(mtd, 0);
-
- /* Find how many chips in each floor. */
- for (i = 1; i < 4; i++) {
- if (doc200x_ident_chip(mtd, i) != mfrid)
- break;
- }
- doc->chips_per_floor = i;
- printk(KERN_DEBUG "Detected %d chips per floor.\n", i);
-}
-
-static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this, int state)
-{
- struct doc_priv *doc = this->priv;
-
- int status;
-
- DoC_WaitReady(doc);
- this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
- DoC_WaitReady(doc);
- status = (int)this->read_byte(mtd);
-
- return status;
-}
-
-static void doc2001_write_byte(struct mtd_info *mtd, u_char datum)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- WriteDOC(datum, docptr, CDSNSlowIO);
- WriteDOC(datum, docptr, Mil_CDSN_IO);
- WriteDOC(datum, docptr, WritePipeTerm);
-}
-
-static u_char doc2001_read_byte(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- /*ReadDOC(docptr, CDSNSlowIO); */
- /* 11.4.5 -- delay twice to allow extended length cycle */
- DoC_Delay(doc, 2);
- ReadDOC(docptr, ReadPipeInit);
- /*return ReadDOC(docptr, Mil_CDSN_IO); */
- return ReadDOC(docptr, LastDataRead);
-}
-
-static void doc2001_writebuf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- for (i=0; i < len; i++)
- WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i);
- /* Terminate write pipeline */
- WriteDOC(0x00, docptr, WritePipeTerm);
-}
-
-static void doc2001_readbuf(struct mtd_info *mtd,
- u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- /* Start read pipeline */
- ReadDOC(docptr, ReadPipeInit);
-
- for (i=0; i < len-1; i++)
- buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff));
-
- /* Terminate read pipeline */
- buf[i] = ReadDOC(docptr, LastDataRead);
-}
-
-static int doc2001_verifybuf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- /* Start read pipeline */
- ReadDOC(docptr, ReadPipeInit);
-
- for (i=0; i < len-1; i++)
- if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) {
- ReadDOC(docptr, LastDataRead);
- return i;
- }
- if (buf[i] != ReadDOC(docptr, LastDataRead))
- return i;
- return 0;
-}
-
-static u_char doc2001plus_read_byte(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- u_char ret;
-
- ReadDOC(docptr, Mplus_ReadPipeInit);
- ReadDOC(docptr, Mplus_ReadPipeInit);
- ret = ReadDOC(docptr, Mplus_LastDataRead);
- if (debug) printk("read_byte returns %02x\n", ret);
- return ret;
-}
-
-static void doc2001plus_writebuf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- if (debug)printk("writebuf of %d bytes: ", len);
- for (i=0; i < len; i++) {
- WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i);
- if (debug && i < 16)
- printk("%02x ", buf[i]);
- }
- if (debug) printk("\n");
-}
-
-static void doc2001plus_readbuf(struct mtd_info *mtd,
- u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- if (debug)printk("readbuf of %d bytes: ", len);
-
- /* Start read pipeline */
- ReadDOC(docptr, Mplus_ReadPipeInit);
- ReadDOC(docptr, Mplus_ReadPipeInit);
-
- for (i=0; i < len-2; i++) {
- buf[i] = ReadDOC(docptr, Mil_CDSN_IO);
- if (debug && i < 16)
- printk("%02x ", buf[i]);
- }
-
- /* Terminate read pipeline */
- buf[len-2] = ReadDOC(docptr, Mplus_LastDataRead);
- if (debug && i < 16)
- printk("%02x ", buf[len-2]);
- buf[len-1] = ReadDOC(docptr, Mplus_LastDataRead);
- if (debug && i < 16)
- printk("%02x ", buf[len-1]);
- if (debug) printk("\n");
-}
-
-static int doc2001plus_verifybuf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- if (debug)printk("verifybuf of %d bytes: ", len);
-
- /* Start read pipeline */
- ReadDOC(docptr, Mplus_ReadPipeInit);
- ReadDOC(docptr, Mplus_ReadPipeInit);
-
- for (i=0; i < len-2; i++)
- if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) {
- ReadDOC(docptr, Mplus_LastDataRead);
- ReadDOC(docptr, Mplus_LastDataRead);
- return i;
- }
- if (buf[len-2] != ReadDOC(docptr, Mplus_LastDataRead))
- return len-2;
- if (buf[len-1] != ReadDOC(docptr, Mplus_LastDataRead))
- return len-1;
- return 0;
-}
-
-static void doc2001plus_select_chip(struct mtd_info *mtd, int chip)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int floor = 0;
-
- if(debug)printk("select chip (%d)\n", chip);
-
- if (chip == -1) {
- /* Disable flash internally */
- WriteDOC(0, docptr, Mplus_FlashSelect);
- return;
- }
-
- floor = chip / doc->chips_per_floor;
- chip -= (floor * doc->chips_per_floor);
-
- /* Assert ChipEnable and deassert WriteProtect */
- WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect);
- this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
-
- doc->curchip = chip;
- doc->curfloor = floor;
-}
-
-static void doc200x_select_chip(struct mtd_info *mtd, int chip)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int floor = 0;
-
- if(debug)printk("select chip (%d)\n", chip);
-
- if (chip == -1)
- return;
-
- floor = chip / doc->chips_per_floor;
- chip -= (floor * doc->chips_per_floor);
-
- /* 11.4.4 -- deassert CE before changing chip */
- doc200x_hwcontrol(mtd, NAND_CTL_CLRNCE);
-
- WriteDOC(floor, docptr, FloorSelect);
- WriteDOC(chip, docptr, CDSNDeviceSelect);
-
- doc200x_hwcontrol(mtd, NAND_CTL_SETNCE);
-
- doc->curchip = chip;
- doc->curfloor = floor;
-}
-
-static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- switch(cmd) {
- case NAND_CTL_SETNCE:
- doc->CDSNControl |= CDSN_CTRL_CE;
- break;
- case NAND_CTL_CLRNCE:
- doc->CDSNControl &= ~CDSN_CTRL_CE;
- break;
- case NAND_CTL_SETCLE:
- doc->CDSNControl |= CDSN_CTRL_CLE;
- break;
- case NAND_CTL_CLRCLE:
- doc->CDSNControl &= ~CDSN_CTRL_CLE;
- break;
- case NAND_CTL_SETALE:
- doc->CDSNControl |= CDSN_CTRL_ALE;
- break;
- case NAND_CTL_CLRALE:
- doc->CDSNControl &= ~CDSN_CTRL_ALE;
- break;
- case NAND_CTL_SETWP:
- doc->CDSNControl |= CDSN_CTRL_WP;
- break;
- case NAND_CTL_CLRWP:
- doc->CDSNControl &= ~CDSN_CTRL_WP;
- break;
- }
- if (debug)printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl);
- WriteDOC(doc->CDSNControl, docptr, CDSNControl);
- /* 11.4.3 -- 4 NOPs after CSDNControl write */
- DoC_Delay(doc, 4);
-}
-
-static void doc2001plus_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- /*
- * Must terminate write pipeline before sending any commands
- * to the device.
- */
- if (command == NAND_CMD_PAGEPROG) {
- WriteDOC(0x00, docptr, Mplus_WritePipeTerm);
- WriteDOC(0x00, docptr, Mplus_WritePipeTerm);
- }
-
- /*
- * Write out the command to the device.
- */
- if (command == NAND_CMD_SEQIN) {
- int readcmd;
-
- if (column >= mtd->oobblock) {
- /* OOB area */
- column -= mtd->oobblock;
- readcmd = NAND_CMD_READOOB;
- } else if (column < 256) {
- /* First 256 bytes --> READ0 */
- readcmd = NAND_CMD_READ0;
- } else {
- column -= 256;
- readcmd = NAND_CMD_READ1;
- }
- WriteDOC(readcmd, docptr, Mplus_FlashCmd);
- }
- WriteDOC(command, docptr, Mplus_FlashCmd);
- WriteDOC(0, docptr, Mplus_WritePipeTerm);
- WriteDOC(0, docptr, Mplus_WritePipeTerm);
-
- if (column != -1 || page_addr != -1) {
- /* Serially input address */
- if (column != -1) {
- /* Adjust columns for 16 bit buswidth */
- if (this->options & NAND_BUSWIDTH_16)
- column >>= 1;
- WriteDOC(column, docptr, Mplus_FlashAddress);
- }
- if (page_addr != -1) {
- WriteDOC((unsigned char) (page_addr & 0xff), docptr, Mplus_FlashAddress);
- WriteDOC((unsigned char) ((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress);
- /* One more address cycle for higher density devices */
- if (this->chipsize & 0x0c000000) {
- WriteDOC((unsigned char) ((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress);
- printk("high density\n");
- }
- }
- WriteDOC(0, docptr, Mplus_WritePipeTerm);
- WriteDOC(0, docptr, Mplus_WritePipeTerm);
- /* deassert ALE */
- if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || command == NAND_CMD_READOOB || command == NAND_CMD_READID)
- WriteDOC(0, docptr, Mplus_FlashControl);
- }
-
- /*
- * program and erase have their own busy handlers
- * status and sequential in needs no delay
- */
- switch (command) {
-
- case NAND_CMD_PAGEPROG:
- case NAND_CMD_ERASE1:
- case NAND_CMD_ERASE2:
- case NAND_CMD_SEQIN:
- case NAND_CMD_STATUS:
- return;
-
- case NAND_CMD_RESET:
- if (this->dev_ready)
- break;
- udelay(this->chip_delay);
- WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd);
- WriteDOC(0, docptr, Mplus_WritePipeTerm);
- WriteDOC(0, docptr, Mplus_WritePipeTerm);
- while ( !(this->read_byte(mtd) & 0x40));
- return;
-
- /* This applies to read commands */
- default:
- /*
- * If we don't have access to the busy pin, we apply the given
- * command delay
- */
- if (!this->dev_ready) {
- udelay (this->chip_delay);
- return;
- }
- }
-
- /* Apply this short delay always to ensure that we do wait tWB in
- * any case on any machine. */
- ndelay (100);
- /* wait until command is processed */
- while (!this->dev_ready(mtd));
-}
-
-static int doc200x_dev_ready(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- if (DoC_is_MillenniumPlus(doc)) {
- /* 11.4.2 -- must NOP four times before checking FR/B# */
- DoC_Delay(doc, 4);
- if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) {
- if(debug)
- printk("not ready\n");
- return 0;
- }
- if (debug)printk("was ready\n");
- return 1;
- } else {
- /* 11.4.2 -- must NOP four times before checking FR/B# */
- DoC_Delay(doc, 4);
- if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) {
- if(debug)
- printk("not ready\n");
- return 0;
- }
- /* 11.4.2 -- Must NOP twice if it's ready */
- DoC_Delay(doc, 2);
- if (debug)printk("was ready\n");
- return 1;
- }
-}
-
-static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
-{
- /* This is our last resort if we couldn't find or create a BBT. Just
- pretend all blocks are good. */
- return 0;
-}
-
-static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- /* Prime the ECC engine */
- switch(mode) {
- case NAND_ECC_READ:
- WriteDOC(DOC_ECC_RESET, docptr, ECCConf);
- WriteDOC(DOC_ECC_EN, docptr, ECCConf);
- break;
- case NAND_ECC_WRITE:
- WriteDOC(DOC_ECC_RESET, docptr, ECCConf);
- WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf);
- break;
- }
-}
-
-static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- /* Prime the ECC engine */
- switch(mode) {
- case NAND_ECC_READ:
- WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf);
- WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf);
- break;
- case NAND_ECC_WRITE:
- WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf);
- WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf);
- break;
- }
-}
-
-/* This code is only called on write */
-static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
- unsigned char *ecc_code)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
- int emptymatch = 1;
-
- /* flush the pipeline */
- if (DoC_is_2000(doc)) {
- WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl);
- WriteDOC(0, docptr, 2k_CDSN_IO);
- WriteDOC(0, docptr, 2k_CDSN_IO);
- WriteDOC(0, docptr, 2k_CDSN_IO);
- WriteDOC(doc->CDSNControl, docptr, CDSNControl);
- } else if (DoC_is_MillenniumPlus(doc)) {
- WriteDOC(0, docptr, Mplus_NOP);
- WriteDOC(0, docptr, Mplus_NOP);
- WriteDOC(0, docptr, Mplus_NOP);
- } else {
- WriteDOC(0, docptr, NOP);
- WriteDOC(0, docptr, NOP);
- WriteDOC(0, docptr, NOP);
- }
-
- for (i = 0; i < 6; i++) {
- if (DoC_is_MillenniumPlus(doc))
- ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i);
- else
- ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i);
- if (ecc_code[i] != empty_write_ecc[i])
- emptymatch = 0;
- }
- if (DoC_is_MillenniumPlus(doc))
- WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf);
- else
- WriteDOC(DOC_ECC_DIS, docptr, ECCConf);
-#if 0
- /* If emptymatch=1, we might have an all-0xff data buffer. Check. */
- if (emptymatch) {
- /* Note: this somewhat expensive test should not be triggered
- often. It could be optimized away by examining the data in
- the writebuf routine, and remembering the result. */
- for (i = 0; i < 512; i++) {
- if (dat[i] == 0xff) continue;
- emptymatch = 0;
- break;
- }
- }
- /* If emptymatch still =1, we do have an all-0xff data buffer.
- Return all-0xff ecc value instead of the computed one, so
- it'll look just like a freshly-erased page. */
- if (emptymatch) memset(ecc_code, 0xff, 6);
-#endif
- return 0;
-}
-
-static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc)
-{
- int i, ret = 0;
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- volatile u_char dummy;
- int emptymatch = 1;
-
- /* flush the pipeline */
- if (DoC_is_2000(doc)) {
- dummy = ReadDOC(docptr, 2k_ECCStatus);
- dummy = ReadDOC(docptr, 2k_ECCStatus);
- dummy = ReadDOC(docptr, 2k_ECCStatus);
- } else if (DoC_is_MillenniumPlus(doc)) {
- dummy = ReadDOC(docptr, Mplus_ECCConf);
- dummy = ReadDOC(docptr, Mplus_ECCConf);
- dummy = ReadDOC(docptr, Mplus_ECCConf);
- } else {
- dummy = ReadDOC(docptr, ECCConf);
- dummy = ReadDOC(docptr, ECCConf);
- dummy = ReadDOC(docptr, ECCConf);
- }
-
- /* Error occured ? */
- if (dummy & 0x80) {
- for (i = 0; i < 6; i++) {
- if (DoC_is_MillenniumPlus(doc))
- calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i);
- else
- calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i);
- if (calc_ecc[i] != empty_read_syndrome[i])
- emptymatch = 0;
- }
- /* If emptymatch=1, the read syndrome is consistent with an
- all-0xff data and stored ecc block. Check the stored ecc. */
- if (emptymatch) {
- for (i = 0; i < 6; i++) {
- if (read_ecc[i] == 0xff) continue;
- emptymatch = 0;
- break;
- }
- }
- /* If emptymatch still =1, check the data block. */
- if (emptymatch) {
- /* Note: this somewhat expensive test should not be triggered
- often. It could be optimized away by examining the data in
- the readbuf routine, and remembering the result. */
- for (i = 0; i < 512; i++) {
- if (dat[i] == 0xff) continue;
- emptymatch = 0;
- break;
- }
- }
- /* If emptymatch still =1, this is almost certainly a freshly-
- erased block, in which case the ECC will not come out right.
- We'll suppress the error and tell the caller everything's
- OK. Because it is. */
- if (!emptymatch) ret = doc_ecc_decode (rs_decoder, dat, calc_ecc);
- if (ret > 0)
- printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret);
- }
- if (DoC_is_MillenniumPlus(doc))
- WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf);
- else
- WriteDOC(DOC_ECC_DIS, docptr, ECCConf);
- if (no_ecc_failures && (ret == -1)) {
- printk(KERN_ERR "suppressing ECC failure\n");
- ret = 0;
- }
- return ret;
-}
-
-/*u_char mydatabuf[528]; */
-
-static struct nand_oobinfo doc200x_oobinfo = {
- .useecc = MTD_NANDECC_AUTOPLACE,
- .eccbytes = 6,
- .eccpos = {0, 1, 2, 3, 4, 5},
- .oobfree = { {8, 8} }
-};
-
-/* Find the (I)NFTL Media Header, and optionally also the mirror media header.
- On sucessful return, buf will contain a copy of the media header for
- further processing. id is the string to scan for, and will presumably be
- either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media
- header. The page #s of the found media headers are placed in mh0_page and
- mh1_page in the DOC private structure. */
-static int __init find_media_headers(struct mtd_info *mtd, u_char *buf,
- const char *id, int findmirror)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- unsigned offs, end = (MAX_MEDIAHEADER_SCAN << this->phys_erase_shift);
- int ret;
- size_t retlen;
-
- end = min(end, mtd->size); /* paranoia */
- for (offs = 0; offs < end; offs += mtd->erasesize) {
- ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf);
- if (retlen != mtd->oobblock) continue;
- if (ret) {
- printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n",
- offs);
- }
- if (memcmp(buf, id, 6)) continue;
- printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs);
- if (doc->mh0_page == -1) {
- doc->mh0_page = offs >> this->page_shift;
- if (!findmirror) return 1;
- continue;
- }
- doc->mh1_page = offs >> this->page_shift;
- return 2;
- }
- if (doc->mh0_page == -1) {
- printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id);
- return 0;
- }
- /* Only one mediaheader was found. We want buf to contain a
- mediaheader on return, so we'll have to re-read the one we found. */
- offs = doc->mh0_page << this->page_shift;
- ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf);
- if (retlen != mtd->oobblock) {
- /* Insanity. Give up. */
- printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n");
- return 0;
- }
- return 1;
-}
-
-static inline int __init nftl_partscan(struct mtd_info *mtd,
- struct mtd_partition *parts)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- int ret = 0;
- u_char *buf;
- struct NFTLMediaHeader *mh;
- const unsigned psize = 1 << this->page_shift;
- unsigned blocks, maxblocks;
- int offs, numheaders;
-
- buf = kmalloc(mtd->oobblock, GFP_KERNEL);
- if (!buf) {
- printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n");
- return 0;
- }
- if (!(numheaders=find_media_headers(mtd, buf, "ANAND", 1))) goto out;
- mh = (struct NFTLMediaHeader *) buf;
-
-/*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
-/* if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
- printk(KERN_INFO " DataOrgID = %s\n"
- " NumEraseUnits = %d\n"
- " FirstPhysicalEUN = %d\n"
- " FormattedSize = %d\n"
- " UnitSizeFactor = %d\n",
- mh->DataOrgID, mh->NumEraseUnits,
- mh->FirstPhysicalEUN, mh->FormattedSize,
- mh->UnitSizeFactor);
-/*#endif */
-
- blocks = mtd->size >> this->phys_erase_shift;
- maxblocks = min(32768U, mtd->erasesize - psize);
-
- if (mh->UnitSizeFactor == 0x00) {
- /* Auto-determine UnitSizeFactor. The constraints are:
- - There can be at most 32768 virtual blocks.
- - There can be at most (virtual block size - page size)
- virtual blocks (because MediaHeader+BBT must fit in 1).
- */
- mh->UnitSizeFactor = 0xff;
- while (blocks > maxblocks) {
- blocks >>= 1;
- maxblocks = min(32768U, (maxblocks << 1) + psize);
- mh->UnitSizeFactor--;
- }
- printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor);
- }
-
- /* NOTE: The lines below modify internal variables of the NAND and MTD
- layers; variables with have already been configured by nand_scan.
- Unfortunately, we didn't know before this point what these values
- should be. Thus, this code is somewhat dependant on the exact
- implementation of the NAND layer. */
- if (mh->UnitSizeFactor != 0xff) {
- this->bbt_erase_shift += (0xff - mh->UnitSizeFactor);
- mtd->erasesize <<= (0xff - mh->UnitSizeFactor);
- printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize);
- blocks = mtd->size >> this->bbt_erase_shift;
- maxblocks = min(32768U, mtd->erasesize - psize);
- }
-
- if (blocks > maxblocks) {
- printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor);
- goto out;
- }
-
- /* Skip past the media headers. */
- offs = max(doc->mh0_page, doc->mh1_page);
- offs <<= this->page_shift;
- offs += mtd->erasesize;
-
- /*parts[0].name = " DiskOnChip Boot / Media Header partition"; */
- /*parts[0].offset = 0; */
- /*parts[0].size = offs; */
-
- parts[0].name = " DiskOnChip BDTL partition";
- parts[0].offset = offs;
- parts[0].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift;
-
- offs += parts[0].size;
- if (offs < mtd->size) {
- parts[1].name = " DiskOnChip Remainder partition";
- parts[1].offset = offs;
- parts[1].size = mtd->size - offs;
- ret = 2;
- goto out;
- }
- ret = 1;
-out:
- kfree(buf);
- return ret;
-}
-
-/* This is a stripped-down copy of the code in inftlmount.c */
-static inline int __init inftl_partscan(struct mtd_info *mtd,
- struct mtd_partition *parts)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- int ret = 0;
- u_char *buf;
- struct INFTLMediaHeader *mh;
- struct INFTLPartition *ip;
- int numparts = 0;
- int blocks;
- int vshift, lastvunit = 0;
- int i;
- int end = mtd->size;
-
- if (inftl_bbt_write)
- end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift);
-
- buf = kmalloc(mtd->oobblock, GFP_KERNEL);
- if (!buf) {
- printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n");
- return 0;
- }
-
- if (!find_media_headers(mtd, buf, "BNAND", 0)) goto out;
- doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift);
- mh = (struct INFTLMediaHeader *) buf;
-
- mh->NoOfBootImageBlocks = le32_to_cpu(mh->NoOfBootImageBlocks);
- mh->NoOfBinaryPartitions = le32_to_cpu(mh->NoOfBinaryPartitions);
- mh->NoOfBDTLPartitions = le32_to_cpu(mh->NoOfBDTLPartitions);
- mh->BlockMultiplierBits = le32_to_cpu(mh->BlockMultiplierBits);
- mh->FormatFlags = le32_to_cpu(mh->FormatFlags);
- mh->PercentUsed = le32_to_cpu(mh->PercentUsed);
-
-/*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
-/* if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
- printk(KERN_INFO " bootRecordID = %s\n"
- " NoOfBootImageBlocks = %d\n"
- " NoOfBinaryPartitions = %d\n"
- " NoOfBDTLPartitions = %d\n"
- " BlockMultiplerBits = %d\n"
- " FormatFlgs = %d\n"
- " OsakVersion = %d.%d.%d.%d\n"
- " PercentUsed = %d\n",
- mh->bootRecordID, mh->NoOfBootImageBlocks,
- mh->NoOfBinaryPartitions,
- mh->NoOfBDTLPartitions,
- mh->BlockMultiplierBits, mh->FormatFlags,
- ((unsigned char *) &mh->OsakVersion)[0] & 0xf,
- ((unsigned char *) &mh->OsakVersion)[1] & 0xf,
- ((unsigned char *) &mh->OsakVersion)[2] & 0xf,
- ((unsigned char *) &mh->OsakVersion)[3] & 0xf,
- mh->PercentUsed);
-/*#endif */
-
- vshift = this->phys_erase_shift + mh->BlockMultiplierBits;
-
- blocks = mtd->size >> vshift;
- if (blocks > 32768) {
- printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits);
- goto out;
- }
-
- blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift);
- if (inftl_bbt_write && (blocks > mtd->erasesize)) {
- printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n");
- goto out;
- }
-
- /* Scan the partitions */
- for (i = 0; (i < 4); i++) {
- ip = &(mh->Partitions[i]);
- ip->virtualUnits = le32_to_cpu(ip->virtualUnits);
- ip->firstUnit = le32_to_cpu(ip->firstUnit);
- ip->lastUnit = le32_to_cpu(ip->lastUnit);
- ip->flags = le32_to_cpu(ip->flags);
- ip->spareUnits = le32_to_cpu(ip->spareUnits);
- ip->Reserved0 = le32_to_cpu(ip->Reserved0);
-
-/*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
-/* if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
- printk(KERN_INFO " PARTITION[%d] ->\n"
- " virtualUnits = %d\n"
- " firstUnit = %d\n"
- " lastUnit = %d\n"
- " flags = 0x%x\n"
- " spareUnits = %d\n",
- i, ip->virtualUnits, ip->firstUnit,
- ip->lastUnit, ip->flags,
- ip->spareUnits);
-/*#endif */
-
-/*
- if ((i == 0) && (ip->firstUnit > 0)) {
- parts[0].name = " DiskOnChip IPL / Media Header partition";
- parts[0].offset = 0;
- parts[0].size = mtd->erasesize * ip->firstUnit;
- numparts = 1;
- }
-*/
-
- if (ip->flags & INFTL_BINARY)
- parts[numparts].name = " DiskOnChip BDK partition";
- else
- parts[numparts].name = " DiskOnChip BDTL partition";
- parts[numparts].offset = ip->firstUnit << vshift;
- parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift;
- numparts++;
- if (ip->lastUnit > lastvunit) lastvunit = ip->lastUnit;
- if (ip->flags & INFTL_LAST) break;
- }
- lastvunit++;
- if ((lastvunit << vshift) < end) {
- parts[numparts].name = " DiskOnChip Remainder partition";
- parts[numparts].offset = lastvunit << vshift;
- parts[numparts].size = end - parts[numparts].offset;
- numparts++;
- }
- ret = numparts;
-out:
- kfree(buf);
- return ret;
-}
-
-static int __init nftl_scan_bbt(struct mtd_info *mtd)
-{
- int ret, numparts;
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- struct mtd_partition parts[2];
-
- memset((char *) parts, 0, sizeof(parts));
- /* On NFTL, we have to find the media headers before we can read the
- BBTs, since they're stored in the media header eraseblocks. */
- numparts = nftl_partscan(mtd, parts);
- if (!numparts) return -EIO;
- this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT |
- NAND_BBT_SAVECONTENT | NAND_BBT_WRITE |
- NAND_BBT_VERSION;
- this->bbt_td->veroffs = 7;
- this->bbt_td->pages[0] = doc->mh0_page + 1;
- if (doc->mh1_page != -1) {
- this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT |
- NAND_BBT_SAVECONTENT | NAND_BBT_WRITE |
- NAND_BBT_VERSION;
- this->bbt_md->veroffs = 7;
- this->bbt_md->pages[0] = doc->mh1_page + 1;
- } else {
- this->bbt_md = NULL;
- }
-
- /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
- At least as nand_bbt.c is currently written. */
- if ((ret = nand_scan_bbt(mtd, NULL)))
- return ret;
- add_mtd_device(mtd);
-#ifdef CONFIG_MTD_PARTITIONS
- if (!no_autopart)
- add_mtd_partitions(mtd, parts, numparts);
-#endif
- return 0;
-}
-
-static int __init inftl_scan_bbt(struct mtd_info *mtd)
-{
- int ret, numparts;
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- struct mtd_partition parts[5];
-
- if (this->numchips > doc->chips_per_floor) {
- printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n");
- return -EIO;
- }
-
- if (DoC_is_MillenniumPlus(doc)) {
- this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE;
- if (inftl_bbt_write)
- this->bbt_td->options |= NAND_BBT_WRITE;
- this->bbt_td->pages[0] = 2;
- this->bbt_md = NULL;
- } else {
- this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT |
- NAND_BBT_VERSION;
- if (inftl_bbt_write)
- this->bbt_td->options |= NAND_BBT_WRITE;
- this->bbt_td->offs = 8;
- this->bbt_td->len = 8;
- this->bbt_td->veroffs = 7;
- this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS;
- this->bbt_td->reserved_block_code = 0x01;
- this->bbt_td->pattern = "MSYS_BBT";
-
- this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT |
- NAND_BBT_VERSION;
- if (inftl_bbt_write)
- this->bbt_md->options |= NAND_BBT_WRITE;
- this->bbt_md->offs = 8;
- this->bbt_md->len = 8;
- this->bbt_md->veroffs = 7;
- this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS;
- this->bbt_md->reserved_block_code = 0x01;
- this->bbt_md->pattern = "TBB_SYSM";
- }
-
- /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
- At least as nand_bbt.c is currently written. */
- if ((ret = nand_scan_bbt(mtd, NULL)))
- return ret;
- memset((char *) parts, 0, sizeof(parts));
- numparts = inftl_partscan(mtd, parts);
- /* At least for now, require the INFTL Media Header. We could probably
- do without it for non-INFTL use, since all it gives us is
- autopartitioning, but I want to give it more thought. */
- if (!numparts) return -EIO;
- add_mtd_device(mtd);
-#ifdef CONFIG_MTD_PARTITIONS
- if (!no_autopart)
- add_mtd_partitions(mtd, parts, numparts);
-#endif
- return 0;
-}
-
-static inline int __init doc2000_init(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
-
- this->write_byte = doc2000_write_byte;
- this->read_byte = doc2000_read_byte;
- this->write_buf = doc2000_writebuf;
- this->read_buf = doc2000_readbuf;
- this->verify_buf = doc2000_verifybuf;
- this->scan_bbt = nftl_scan_bbt;
-
- doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO;
- doc2000_count_chips(mtd);
- mtd->name = "DiskOnChip 2000 (NFTL Model)";
- return (4 * doc->chips_per_floor);
-}
-
-static inline int __init doc2001_init(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
-
- this->write_byte = doc2001_write_byte;
- this->read_byte = doc2001_read_byte;
- this->write_buf = doc2001_writebuf;
- this->read_buf = doc2001_readbuf;
- this->verify_buf = doc2001_verifybuf;
-
- ReadDOC(doc->virtadr, ChipID);
- ReadDOC(doc->virtadr, ChipID);
- ReadDOC(doc->virtadr, ChipID);
- if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) {
- /* It's not a Millennium; it's one of the newer
- DiskOnChip 2000 units with a similar ASIC.
- Treat it like a Millennium, except that it
- can have multiple chips. */
- doc2000_count_chips(mtd);
- mtd->name = "DiskOnChip 2000 (INFTL Model)";
- this->scan_bbt = inftl_scan_bbt;
- return (4 * doc->chips_per_floor);
- } else {
- /* Bog-standard Millennium */
- doc->chips_per_floor = 1;
- mtd->name = "DiskOnChip Millennium";
- this->scan_bbt = nftl_scan_bbt;
- return 1;
- }
-}
-
-static inline int __init doc2001plus_init(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
-
- this->write_byte = NULL;
- this->read_byte = doc2001plus_read_byte;
- this->write_buf = doc2001plus_writebuf;
- this->read_buf = doc2001plus_readbuf;
- this->verify_buf = doc2001plus_verifybuf;
- this->scan_bbt = inftl_scan_bbt;
- this->hwcontrol = NULL;
- this->select_chip = doc2001plus_select_chip;
- this->cmdfunc = doc2001plus_command;
- this->enable_hwecc = doc2001plus_enable_hwecc;
-
- doc->chips_per_floor = 1;
- mtd->name = "DiskOnChip Millennium Plus";
-
- return 1;
-}
-
-static inline int __init doc_probe(unsigned long physadr)
-{
- unsigned char ChipID;
- struct mtd_info *mtd;
- struct nand_chip *nand;
- struct doc_priv *doc;
- void __iomem *virtadr;
- unsigned char save_control;
- unsigned char tmp, tmpb, tmpc;
- int reg, len, numchips;
- int ret = 0;
-
- virtadr = ioremap(physadr, DOC_IOREMAP_LEN);
- if (!virtadr) {
- printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr);
- return -EIO;
- }
-
- /* It's not possible to cleanly detect the DiskOnChip - the
- * bootup procedure will put the device into reset mode, and
- * it's not possible to talk to it without actually writing
- * to the DOCControl register. So we store the current contents
- * of the DOCControl register's location, in case we later decide
- * that it's not a DiskOnChip, and want to put it back how we
- * found it.
- */
- save_control = ReadDOC(virtadr, DOCControl);
-
- /* Reset the DiskOnChip ASIC */
- WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
- virtadr, DOCControl);
- WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
- virtadr, DOCControl);
-
- /* Enable the DiskOnChip ASIC */
- WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
- virtadr, DOCControl);
- WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
- virtadr, DOCControl);
-
- ChipID = ReadDOC(virtadr, ChipID);
-
- switch(ChipID) {
- case DOC_ChipID_Doc2k:
- reg = DoC_2k_ECCStatus;
- break;
- case DOC_ChipID_DocMil:
- reg = DoC_ECCConf;
- break;
- case DOC_ChipID_DocMilPlus16:
- case DOC_ChipID_DocMilPlus32:
- case 0:
- /* Possible Millennium Plus, need to do more checks */
- /* Possibly release from power down mode */
- for (tmp = 0; (tmp < 4); tmp++)
- ReadDOC(virtadr, Mplus_Power);
-
- /* Reset the Millennium Plus ASIC */
- tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT |
- DOC_MODE_BDECT;
- WriteDOC(tmp, virtadr, Mplus_DOCControl);
- WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm);
-
- mdelay(1);
- /* Enable the Millennium Plus ASIC */
- tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT |
- DOC_MODE_BDECT;
- WriteDOC(tmp, virtadr, Mplus_DOCControl);
- WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm);
- mdelay(1);
-
- ChipID = ReadDOC(virtadr, ChipID);
-
- switch (ChipID) {
- case DOC_ChipID_DocMilPlus16:
- reg = DoC_Mplus_Toggle;
- break;
- case DOC_ChipID_DocMilPlus32:
- printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n");
- default:
- ret = -ENODEV;
- goto notfound;
- }
- break;
-
- default:
- ret = -ENODEV;
- goto notfound;
- }
- /* Check the TOGGLE bit in the ECC register */
- tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT;
- tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT;
- tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT;
- if ((tmp == tmpb) || (tmp != tmpc)) {
- printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr);
- ret = -ENODEV;
- goto notfound;
- }
-
- for (mtd = doclist; mtd; mtd = doc->nextdoc) {
- unsigned char oldval;
- unsigned char newval;
- nand = mtd->priv;
- doc = nand->priv;
- /* Use the alias resolution register to determine if this is
- in fact the same DOC aliased to a new address. If writes
- to one chip's alias resolution register change the value on
- the other chip, they're the same chip. */
- if (ChipID == DOC_ChipID_DocMilPlus16) {
- oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution);
- newval = ReadDOC(virtadr, Mplus_AliasResolution);
- } else {
- oldval = ReadDOC(doc->virtadr, AliasResolution);
- newval = ReadDOC(virtadr, AliasResolution);
- }
- if (oldval != newval)
- continue;
- if (ChipID == DOC_ChipID_DocMilPlus16) {
- WriteDOC(~newval, virtadr, Mplus_AliasResolution);
- oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution);
- WriteDOC(newval, virtadr, Mplus_AliasResolution); /* restore it */
- } else {
- WriteDOC(~newval, virtadr, AliasResolution);
- oldval = ReadDOC(doc->virtadr, AliasResolution);
- WriteDOC(newval, virtadr, AliasResolution); /* restore it */
- }
- newval = ~newval;
- if (oldval == newval) {
- printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr);
- goto notfound;
- }
- }
-
- printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr);
-
- len = sizeof(struct mtd_info) +
- sizeof(struct nand_chip) +
- sizeof(struct doc_priv) +
- (2 * sizeof(struct nand_bbt_descr));
- mtd = kmalloc(len, GFP_KERNEL);
- if (!mtd) {
- printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len);
- ret = -ENOMEM;
- goto fail;
- }
- memset(mtd, 0, len);
-
- nand = (struct nand_chip *) (mtd + 1);
- doc = (struct doc_priv *) (nand + 1);
- nand->bbt_td = (struct nand_bbt_descr *) (doc + 1);
- nand->bbt_md = nand->bbt_td + 1;
-
- mtd->priv = nand;
- mtd->owner = THIS_MODULE;
-
- nand->priv = doc;
- nand->select_chip = doc200x_select_chip;
- nand->hwcontrol = doc200x_hwcontrol;
- nand->dev_ready = doc200x_dev_ready;
- nand->waitfunc = doc200x_wait;
- nand->block_bad = doc200x_block_bad;
- nand->enable_hwecc = doc200x_enable_hwecc;
- nand->calculate_ecc = doc200x_calculate_ecc;
- nand->correct_data = doc200x_correct_data;
-
- nand->autooob = &doc200x_oobinfo;
- nand->eccmode = NAND_ECC_HW6_512;
- nand->options = NAND_USE_FLASH_BBT | NAND_HWECC_SYNDROME;
-
- doc->physadr = physadr;
- doc->virtadr = virtadr;
- doc->ChipID = ChipID;
- doc->curfloor = -1;
- doc->curchip = -1;
- doc->mh0_page = -1;
- doc->mh1_page = -1;
- doc->nextdoc = doclist;
-
- if (ChipID == DOC_ChipID_Doc2k)
- numchips = doc2000_init(mtd);
- else if (ChipID == DOC_ChipID_DocMilPlus16)
- numchips = doc2001plus_init(mtd);
- else
- numchips = doc2001_init(mtd);
-
- if ((ret = nand_scan(mtd, numchips))) {
- /* DBB note: i believe nand_release is necessary here, as
- buffers may have been allocated in nand_base. Check with
- Thomas. FIX ME! */
- /* nand_release will call del_mtd_device, but we haven't yet
- added it. This is handled without incident by
- del_mtd_device, as far as I can tell. */
- nand_release(mtd);
- kfree(mtd);
- goto fail;
- }
-
- /* Success! */
- doclist = mtd;
- return 0;
-
-notfound:
- /* Put back the contents of the DOCControl register, in case it's not
- actually a DiskOnChip. */
- WriteDOC(save_control, virtadr, DOCControl);
-fail:
- iounmap(virtadr);
- return ret;
-}
-
-static void release_nanddoc(void)
-{
- struct mtd_info *mtd, *nextmtd;
- struct nand_chip *nand;
- struct doc_priv *doc;
-
- for (mtd = doclist; mtd; mtd = nextmtd) {
- nand = mtd->priv;
- doc = nand->priv;
-
- nextmtd = doc->nextdoc;
- nand_release(mtd);
- iounmap(doc->virtadr);
- kfree(mtd);
- }
-}
-
-static int __init init_nanddoc(void)
-{
- int i, ret = 0;
-
- /* We could create the decoder on demand, if memory is a concern.
- * This way we have it handy, if an error happens
- *
- * Symbolsize is 10 (bits)
- * Primitve polynomial is x^10+x^3+1
- * first consecutive root is 510
- * primitve element to generate roots = 1
- * generator polinomial degree = 4
- */
- rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS);
- if (!rs_decoder) {
- printk (KERN_ERR "DiskOnChip: Could not create a RS decoder\n");
- return -ENOMEM;
- }
-
- if (doc_config_location) {
- printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location);
- ret = doc_probe(doc_config_location);
- if (ret < 0)
- goto outerr;
- } else {
- for (i=0; (doc_locations[i] != 0xffffffff); i++) {
- doc_probe(doc_locations[i]);
- }
- }
- /* No banner message any more. Print a message if no DiskOnChip
- found, so the user knows we at least tried. */
- if (!doclist) {
- printk(KERN_INFO "No valid DiskOnChip devices found\n");
- ret = -ENODEV;
- goto outerr;
- }
- return 0;
-outerr:
- free_rs(rs_decoder);
- return ret;
-}
-
-static void __exit cleanup_nanddoc(void)
-{
- /* Cleanup the nand/DoC resources */
- release_nanddoc();
-
- /* Free the reed solomon resources */
- if (rs_decoder) {
- free_rs(rs_decoder);
- }
-}
-
-module_init(init_nanddoc);
-module_exit(cleanup_nanddoc);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
-MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n");
-#endif
diff --git a/drivers/nand/nand.c b/drivers/nand/nand.c
deleted file mode 100644
index 4927231..0000000
--- a/drivers/nand/nand.c
+++ /dev/null
@@ -1,247 +0,0 @@
-/*
- * (C) Copyright 2005
- * 2N Telekomunikace, a.s. <www.2n.cz>
- * Ladislav Michl <michl@2n.cz>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-#include <common.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/mtd.h>
-#include <init.h>
-#include <xfuncs.h>
-#include <driver.h>
-#include <malloc.h>
-#include <ioctl.h>
-#include <nand.h>
-#include <errno.h>
-
-static ssize_t nand_read(struct cdev *cdev, void* buf, size_t count, ulong offset, ulong flags)
-{
- struct mtd_info *info = cdev->priv;
- size_t retlen;
- int ret;
-
- debug("nand_read: 0x%08x 0x%08x\n", offset, count);
-
- ret = info->read(info, offset, count, &retlen, buf);
-
- if(ret) {
- printf("err %d\n", ret);
- return ret;
- }
- return retlen;
-}
-
-#define NOTALIGNED(x) (x & (info->writesize - 1)) != 0
-
-static int all_ff(const void *buf, int len)
-{
- int i;
- const uint8_t *p = buf;
-
- for (i = 0; i < len; i++)
- if (p[i] != 0xFF)
- return 0;
- return 1;
-}
-
-static ssize_t nand_write(struct cdev* cdev, const void *buf, size_t _count, ulong offset, ulong flags)
-{
- struct mtd_info *info = cdev->priv;
- size_t retlen, now;
- int ret = 0;
- void *wrbuf = NULL;
- size_t count = _count;
-
- if (NOTALIGNED(offset)) {
- printf("offset 0x%08x not page aligned\n", offset);
- return -EINVAL;
- }
-
- debug("write: 0x%08x 0x%08x\n", offset, count);
-
- while (count) {
- now = count > info->writesize ? info->writesize : count;
-
- if (NOTALIGNED(now)) {
- debug("not aligned: %d %d\n", info->writesize, (offset % info->writesize));
- wrbuf = xmalloc(info->writesize);
- memset(wrbuf, 0xff, info->writesize);
- memcpy(wrbuf + (offset % info->writesize), buf, now);
- if (!all_ff(wrbuf, info->writesize))
- ret = info->write(info, offset & ~(info->writesize - 1),
- info->writesize, &retlen, wrbuf);
- free(wrbuf);
- } else {
- if (!all_ff(buf, info->writesize))
- ret = info->write(info, offset, now, &retlen, buf);
- debug("offset: 0x%08x now: 0x%08x retlen: 0x%08x\n", offset, now, retlen);
- }
- if (ret)
- goto out;
-
- offset += now;
- count -= now;
- buf += now;
- }
-
-out:
- return ret ? ret : _count;
-}
-
-static int nand_ioctl(struct cdev *cdev, int request, void *buf)
-{
- struct mtd_info *info = cdev->priv;
- struct mtd_info_user *user = buf;
-
- switch (request) {
- case MEMGETBADBLOCK:
- debug("MEMGETBADBLOCK: 0x%08x\n", (off_t)buf);
- return info->block_isbad(info, (off_t)buf);
- case MEMSETBADBLOCK:
- debug("MEMSETBADBLOCK: 0x%08x\n", (off_t)buf);
- return info->block_markbad(info, (off_t)buf);
- case MEMGETINFO:
- user->type = info->type;
- user->flags = info->flags;
- user->size = info->size;
- user->erasesize = info->erasesize;
- user->oobsize = info->oobsize;
- /* The below fields are obsolete */
- user->ecctype = -1;
- user->eccsize = 0;
- return 0;
- }
-
- return 0;
-}
-
-static ssize_t nand_erase(struct cdev *cdev, size_t count, unsigned long offset)
-{
- struct mtd_info *info = cdev->priv;
- struct erase_info erase;
- int ret;
-
- memset(&erase, 0, sizeof(erase));
- erase.mtd = info;
- erase.addr = offset;
- erase.len = info->erasesize;
-
- while (count > 0) {
- debug("erase %d %d\n", erase.addr, erase.len);
-
- ret = info->block_isbad(info, erase.addr);
- if (ret > 0) {
- printf("Skipping bad block at 0x%08x\n", erase.addr);
- } else {
- ret = info->erase(info, &erase);
- if (ret)
- return ret;
- }
-
- erase.addr += info->erasesize;
- count -= count > info->erasesize ? info->erasesize : count;
- }
-
- return 0;
-}
-#if 0
-static char* mtd_get_size(struct device_d *, struct param_d *param)
-{
- static char
-}
-#endif
-
-static struct file_operations nand_ops = {
- .read = nand_read,
- .write = nand_write,
- .ioctl = nand_ioctl,
- .lseek = dev_lseek_default,
- .erase = nand_erase,
-};
-
-static ssize_t nand_read_oob(struct cdev *cdev, void *buf, size_t count, ulong offset, ulong flags)
-{
- struct mtd_info *info = cdev->priv;
- struct nand_chip *chip = info->priv;
- struct mtd_oob_ops ops;
- int ret;
-
- if (count < info->oobsize)
- return -EINVAL;
-
- ops.mode = MTD_OOB_RAW;
- ops.ooboffs = 0;
- ops.ooblen = info->oobsize;
- ops.oobbuf = buf;
- ops.datbuf = NULL;
- ops.len = info->oobsize;
-
- offset /= info->oobsize;
- ret = info->read_oob(info, offset << chip->page_shift, &ops);
- if (ret)
- return ret;
-
- return info->oobsize;
-}
-
-static struct file_operations nand_ops_oob = {
- .read = nand_read_oob,
- .ioctl = nand_ioctl,
- .lseek = dev_lseek_default,
-};
-
-int add_mtd_device(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd->priv;
- char str[16];
-
- strcpy(mtd->class_dev.name, "nand");
- register_device(&mtd->class_dev);
-
- mtd->cdev.ops = &nand_ops;
- mtd->cdev.size = mtd->size;
- mtd->cdev.name = asprintf("nand%d", mtd->class_dev.id);
- mtd->cdev.priv = mtd;
- mtd->cdev.dev = &mtd->class_dev;
-
- sprintf(str, "%u", mtd->size);
- dev_add_param_fixed(&mtd->class_dev, "size", str);
-
- devfs_create(&mtd->cdev);
-
- mtd->cdev_oob.ops = &nand_ops_oob;
- mtd->cdev_oob.size = (mtd->size >> chip->page_shift) * mtd->oobsize;
- mtd->cdev_oob.name = asprintf("nand_oob%d", mtd->class_dev.id);
- mtd->cdev_oob.priv = mtd;
- mtd->cdev_oob.dev = &mtd->class_dev;
- devfs_create(&mtd->cdev_oob);
-
- return 0;
-}
-
-int del_mtd_device (struct mtd_info *mtd)
-{
- unregister_device(&mtd->class_dev);
- free(mtd->cdev_oob.name);
- free(mtd->param_size.value);
- free(mtd->cdev.name);
- return 0;
-}
-
diff --git a/drivers/nand/nand_base.c b/drivers/nand/nand_base.c
deleted file mode 100644
index b75a450..0000000
--- a/drivers/nand/nand_base.c
+++ /dev/null
@@ -1,2648 +0,0 @@
-/*
- * drivers/mtd/nand.c
- *
- * Overview:
- * This is the generic MTD driver for NAND flash devices. It should be
- * capable of working with almost all NAND chips currently available.
- * Basic support for AG-AND chips is provided.
- *
- * Additional technical information is available on
- * http://www.linux-mtd.infradead.org/doc/nand.html
- *
- * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
- * 2002-2006 Thomas Gleixner (tglx@linutronix.de)
- *
- * Credits:
- * David Woodhouse for adding multichip support
- *
- * Aleph One Ltd. and Toby Churchill Ltd. for supporting the
- * rework for 2K page size chips
- *
- * TODO:
- * Enable cached programming for 2k page size chips
- * Check, if mtd->ecctype should be set to MTD_ECC_HW
- * if we have HW ecc support.
- * The AG-AND chips have nice features for speed improvement,
- * which are not supported yet. Read / program 4 pages in one go.
- * BBT table is not serialized, has to be fixed
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-#include <common.h>
-#include <errno.h>
-#include <clock.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/err.h>
-#include <linux/mtd/nand_ecc.h>
-#include <asm/byteorder.h>
-#include <asm/io.h>
-#include <malloc.h>
-#include <module.h>
-
-#ifndef DOXYGEN_SHOULD_SKIP_THIS
-
-/* Define default oob placement schemes for large and small page devices */
-static struct nand_ecclayout nand_oob_8 = {
- .eccbytes = 3,
- .eccpos = {0, 1, 2},
- .oobfree = {
- {.offset = 3,
- .length = 2},
- {.offset = 6,
- .length = 2}}
-};
-
-static struct nand_ecclayout nand_oob_16 = {
- .eccbytes = 6,
- .eccpos = {0, 1, 2, 3, 6, 7},
- .oobfree = {
- {.offset = 8,
- . length = 8}}
-};
-
-static struct nand_ecclayout nand_oob_64 = {
- .eccbytes = 24,
- .eccpos = {
- 40, 41, 42, 43, 44, 45, 46, 47,
- 48, 49, 50, 51, 52, 53, 54, 55,
- 56, 57, 58, 59, 60, 61, 62, 63},
- .oobfree = {
- {.offset = 2,
- .length = 38}}
-};
-
-static int nand_get_device(struct nand_chip *chip, struct mtd_info *mtd,
- int new_state);
-
-static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
- struct mtd_oob_ops *ops);
-
-#define DEFINE_LED_TRIGGER(x)
-#define DEFINE_LED_TRIGGER_GLOBAL(x)
-#define led_trigger_register_simple(x, y) do {} while(0)
-#define led_trigger_unregister_simple(x) do {} while(0)
-#define led_trigger_event(x, y) do {} while(0)
-
-/*
- * For devices which display every fart in the system on a separate LED. Is
- * compiled away when LED support is disabled.
- */
-DEFINE_LED_TRIGGER(nand_led_trigger);
-
-/**
- * nand_release_device - [GENERIC] release chip
- * @mtd: MTD device structure
- *
- * Deselect, release chip lock and wake up anyone waiting on the device
- */
-static void nand_release_device(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd->priv;
-
- /* De-select the NAND device */
- chip->select_chip(mtd, -1);
-
- /* Release the controller and the chip */
- chip->controller->active = NULL;
- chip->state = FL_READY;
-}
-
-/**
- * nand_read_byte - [DEFAULT] read one byte from the chip
- * @mtd: MTD device structure
- *
- * Default read function for 8bit buswith
- */
-static uint8_t nand_read_byte(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd->priv;
- return readb(chip->IO_ADDR_R);
-}
-
-/**
- * nand_read_byte16 - [DEFAULT] read one byte endianess aware from the chip
- * @mtd: MTD device structure
- *
- * Default read function for 16bit buswith with
- * endianess conversion
- */
-static uint8_t nand_read_byte16(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd->priv;
- return (uint8_t) cpu_to_le16(readw(chip->IO_ADDR_R));
-}
-
-/**
- * nand_read_word - [DEFAULT] read one word from the chip
- * @mtd: MTD device structure
- *
- * Default read function for 16bit buswith without
- * endianess conversion
- */
-static u16 nand_read_word(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd->priv;
- return readw(chip->IO_ADDR_R);
-}
-
-/**
- * nand_select_chip - [DEFAULT] control CE line
- * @mtd: MTD device structure
- * @chipnr: chipnumber to select, -1 for deselect
- *
- * Default select function for 1 chip devices.
- */
-static void nand_select_chip(struct mtd_info *mtd, int chipnr)
-{
- struct nand_chip *chip = mtd->priv;
-
- switch (chipnr) {
- case -1:
- chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE);
- break;
- case 0:
- break;
- default:
- printf("%s: illegal chip number %d\n", chipnr);
- }
-}
-
-/**
- * nand_write_buf - [DEFAULT] write buffer to chip
- * @mtd: MTD device structure
- * @buf: data buffer
- * @len: number of bytes to write
- *
- * Default write function for 8bit buswith
- */
-static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
-{
- int i;
- struct nand_chip *chip = mtd->priv;
-
- for (i = 0; i < len; i++)
- writeb(buf[i], chip->IO_ADDR_W);
-}
-
-/**
- * nand_read_buf - [DEFAULT] read chip data into buffer
- * @mtd: MTD device structure
- * @buf: buffer to store date
- * @len: number of bytes to read
- *
- * Default read function for 8bit buswith
- */
-static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
-{
- int i;
- struct nand_chip *chip = mtd->priv;
-
- for (i = 0; i < len; i++)
- buf[i] = readb(chip->IO_ADDR_R);
-}
-
-/**
- * nand_verify_buf - [DEFAULT] Verify chip data against buffer
- * @mtd: MTD device structure
- * @buf: buffer containing the data to compare
- * @len: number of bytes to compare
- *
- * Default verify function for 8bit buswith
- */
-static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
-{
- int i;
- struct nand_chip *chip = mtd->priv;
-
- for (i = 0; i < len; i++)
- if (buf[i] != readb(chip->IO_ADDR_R))
- return -EFAULT;
- return 0;
-}
-
-/**
- * nand_write_buf16 - [DEFAULT] write buffer to chip
- * @mtd: MTD device structure
- * @buf: data buffer
- * @len: number of bytes to write
- *
- * Default write function for 16bit buswith
- */
-static void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len)
-{
- int i;
- struct nand_chip *chip = mtd->priv;
- u16 *p = (u16 *) buf;
- len >>= 1;
-
- for (i = 0; i < len; i++)
- writew(p[i], chip->IO_ADDR_W);
-
-}
-
-/**
- * nand_read_buf16 - [DEFAULT] read chip data into buffer
- * @mtd: MTD device structure
- * @buf: buffer to store date
- * @len: number of bytes to read
- *
- * Default read function for 16bit buswith
- */
-static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len)
-{
- int i;
- struct nand_chip *chip = mtd->priv;
- u16 *p = (u16 *) buf;
- len >>= 1;
-
- for (i = 0; i < len; i++)
- p[i] = readw(chip->IO_ADDR_R);
-}
-
-/**
- * nand_verify_buf16 - [DEFAULT] Verify chip data against buffer
- * @mtd: MTD device structure
- * @buf: buffer containing the data to compare
- * @len: number of bytes to compare
- *
- * Default verify function for 16bit buswith
- */
-static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len)
-{
- int i;
- struct nand_chip *chip = mtd->priv;
- u16 *p = (u16 *) buf;
- len >>= 1;
-
- for (i = 0; i < len; i++)
- if (p[i] != readw(chip->IO_ADDR_R))
- return -EFAULT;
-
- return 0;
-}
-
-/**
- * nand_block_bad - [DEFAULT] Read bad block marker from the chip
- * @mtd: MTD device structure
- * @ofs: offset from device start
- * @getchip: 0, if the chip is already selected
- *
- * Check, if the block is bad.
- */
-static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
-{
- int page, chipnr, res = 0;
- struct nand_chip *chip = mtd->priv;
- u16 bad;
-
- page = (int)(ofs >> chip->page_shift) & chip->pagemask;
-
- if (getchip) {
- chipnr = (int)(ofs >> chip->chip_shift);
-
- nand_get_device(chip, mtd, FL_READING);
-
- /* Select the NAND device */
- chip->select_chip(mtd, chipnr);
- }
-
- if (chip->options & NAND_BUSWIDTH_16) {
- chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos & 0xFE,
- page);
- bad = cpu_to_le16(chip->read_word(mtd));
- if (chip->badblockpos & 0x1)
- bad >>= 8;
- if ((bad & 0xFF) != 0xff)
- res = 1;
- } else {
- chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos, page);
- if (chip->read_byte(mtd) != 0xff)
- res = 1;
- }
-
- if (getchip)
- nand_release_device(mtd);
-
- return res;
-}
-
-/**
- * nand_default_block_markbad - [DEFAULT] mark a block bad
- * @mtd: MTD device structure
- * @ofs: offset from device start
- *
- * This is the default implementation, which can be overridden by
- * a hardware specific driver.
-*/
-static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
-{
- struct nand_chip *chip = mtd->priv;
- uint8_t buf[2] = { 0, 0 };
- int block, ret;
-
- /* Get block number */
- block = (int)(ofs >> chip->bbt_erase_shift);
- if (chip->bbt)
- chip->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
-
- /* Do we have a flash based bad block table ? */
- if (chip->options & NAND_USE_FLASH_BBT)
- ret = nand_update_bbt(mtd, ofs);
- else {
- /* We write two bytes, so we dont have to mess with 16 bit
- * access
- */
- nand_get_device(chip, mtd, FL_WRITING);
- ofs += mtd->oobsize;
- chip->ops.len = chip->ops.ooblen = 2;
- chip->ops.datbuf = NULL;
- chip->ops.oobbuf = buf;
- chip->ops.ooboffs = chip->badblockpos & ~0x01;
-
- ret = nand_do_write_oob(mtd, ofs, &chip->ops);
- nand_release_device(mtd);
- }
- if (!ret)
- mtd->ecc_stats.badblocks++;
-
- return ret;
-}
-
-/**
- * nand_check_wp - [GENERIC] check if the chip is write protected
- * @mtd: MTD device structure
- * Check, if the device is write protected
- *
- * The function expects, that the device is already selected
- */
-static int nand_check_wp(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd->priv;
- /* Check the WP bit */
- chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
- return (chip->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1;
-}
-
-/**
- * nand_block_checkbad - [GENERIC] Check if a block is marked bad
- * @mtd: MTD device structure
- * @ofs: offset from device start
- * @getchip: 0, if the chip is already selected
- * @allowbbt: 1, if its allowed to access the bbt area
- *
- * Check, if the block is bad. Either by reading the bad block table or
- * calling of the scan function.
- */
-static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip,
- int allowbbt)
-{
- struct nand_chip *chip = mtd->priv;
-
- if (!chip->bbt)
- return chip->block_bad(mtd, ofs, getchip);
-
- /* Return info from the table */
- return nand_isbad_bbt(mtd, ofs, allowbbt);
-}
-
-/*
- * Wait for the ready pin, after a command
- * The timeout is catched later.
- */
-void nand_wait_ready(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd->priv;
- uint64_t start = get_time_ns();
-
- led_trigger_event(nand_led_trigger, LED_FULL);
- /* wait until command is processed or timeout occures */
- do {
- if (chip->dev_ready(mtd))
- break;
- } while (!is_timeout(start, SECOND * 2));
- led_trigger_event(nand_led_trigger, LED_OFF);
-}
-EXPORT_SYMBOL(nand_wait_ready);
-
-/**
- * nand_command - [DEFAULT] Send command to NAND device
- * @mtd: MTD device structure
- * @command: the command to be sent
- * @column: the column address for this command, -1 if none
- * @page_addr: the page address for this command, -1 if none
- *
- * Send command to NAND device. This function is used for small page
- * devices (256/512 Bytes per page)
- */
-static void nand_command(struct mtd_info *mtd, unsigned int command,
- int column, int page_addr)
-{
- register struct nand_chip *chip = mtd->priv;
- int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE;
-
- /*
- * Write out the command to the device.
- */
- if (command == NAND_CMD_SEQIN) {
- int readcmd;
-
- if (column >= mtd->writesize) {
- /* OOB area */
- column -= mtd->writesize;
- readcmd = NAND_CMD_READOOB;
- } else if (column < 256) {
- /* First 256 bytes --> READ0 */
- readcmd = NAND_CMD_READ0;
- } else {
- column -= 256;
- readcmd = NAND_CMD_READ1;
- }
- chip->cmd_ctrl(mtd, readcmd, ctrl);
- ctrl &= ~NAND_CTRL_CHANGE;
- }
- chip->cmd_ctrl(mtd, command, ctrl);
-
- /*
- * Address cycle, when necessary
- */
- ctrl = NAND_CTRL_ALE | NAND_CTRL_CHANGE;
- /* Serially input address */
- if (column != -1) {
- /* Adjust columns for 16 bit buswidth */
- if (chip->options & NAND_BUSWIDTH_16)
- column >>= 1;
- chip->cmd_ctrl(mtd, column, ctrl);
- ctrl &= ~NAND_CTRL_CHANGE;
- }
- if (page_addr != -1) {
- chip->cmd_ctrl(mtd, page_addr, ctrl);
- ctrl &= ~NAND_CTRL_CHANGE;
- chip->cmd_ctrl(mtd, page_addr >> 8, ctrl);
- /* One more address cycle for devices > 32MiB */
- if (chip->chipsize > (32 << 20))
- chip->cmd_ctrl(mtd, page_addr >> 16, ctrl);
- }
- chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
-
- /*
- * program and erase have their own busy handlers
- * status and sequential in needs no delay
- */
- switch (command) {
-
- case NAND_CMD_PAGEPROG:
- case NAND_CMD_ERASE1:
- case NAND_CMD_ERASE2:
- case NAND_CMD_SEQIN:
- case NAND_CMD_STATUS:
- return;
-
- case NAND_CMD_RESET:
- if (chip->dev_ready)
- break;
- udelay(chip->chip_delay);
- chip->cmd_ctrl(mtd, NAND_CMD_STATUS,
- NAND_CTRL_CLE | NAND_CTRL_CHANGE);
- chip->cmd_ctrl(mtd,
- NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
- while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ;
- return;
-
- /* This applies to read commands */
- default:
- /*
- * If we don't have access to the busy pin, we apply the given
- * command delay
- */
- if (!chip->dev_ready) {
- udelay(chip->chip_delay);
- return;
- }
- }
- /* Apply this short delay always to ensure that we do wait tWB in
- * any case on any machine. */
- ndelay(100);
-
- nand_wait_ready(mtd);
-}
-
-/**
- * nand_command_lp - [DEFAULT] Send command to NAND large page device
- * @mtd: MTD device structure
- * @command: the command to be sent
- * @column: the column address for this command, -1 if none
- * @page_addr: the page address for this command, -1 if none
- *
- * Send command to NAND device. This is the version for the new large page
- * devices We dont have the separate regions as we have in the small page
- * devices. We must emulate NAND_CMD_READOOB to keep the code compatible.
- */
-static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
- int column, int page_addr)
-{
- register struct nand_chip *chip = mtd->priv;
-
- /* Emulate NAND_CMD_READOOB */
- if (command == NAND_CMD_READOOB) {
- column += mtd->writesize;
- command = NAND_CMD_READ0;
- }
-
- /* Command latch cycle */
- chip->cmd_ctrl(mtd, command & 0xff,
- NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
-
- if (column != -1 || page_addr != -1) {
- int ctrl = NAND_CTRL_CHANGE | NAND_NCE | NAND_ALE;
-
- /* Serially input address */
- if (column != -1) {
- /* Adjust columns for 16 bit buswidth */
- if (chip->options & NAND_BUSWIDTH_16)
- column >>= 1;
- chip->cmd_ctrl(mtd, column, ctrl);
- ctrl &= ~NAND_CTRL_CHANGE;
- chip->cmd_ctrl(mtd, column >> 8, ctrl);
- }
- if (page_addr != -1) {
- chip->cmd_ctrl(mtd, page_addr, ctrl);
- chip->cmd_ctrl(mtd, page_addr >> 8,
- NAND_NCE | NAND_ALE);
- /* One more address cycle for devices > 128MiB */
- if (chip->chipsize > (128 << 20))
- chip->cmd_ctrl(mtd, page_addr >> 16,
- NAND_NCE | NAND_ALE);
- }
- }
- chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
-
- /*
- * program and erase have their own busy handlers
- * status, sequential in, and deplete1 need no delay
- */
- switch (command) {
-
- case NAND_CMD_CACHEDPROG:
- case NAND_CMD_PAGEPROG:
- case NAND_CMD_ERASE1:
- case NAND_CMD_ERASE2:
- case NAND_CMD_SEQIN:
- case NAND_CMD_RNDIN:
- case NAND_CMD_STATUS:
- case NAND_CMD_DEPLETE1:
- return;
-
- /*
- * read error status commands require only a short delay
- */
- case NAND_CMD_STATUS_ERROR:
- case NAND_CMD_STATUS_ERROR0:
- case NAND_CMD_STATUS_ERROR1:
- case NAND_CMD_STATUS_ERROR2:
- case NAND_CMD_STATUS_ERROR3:
- udelay(chip->chip_delay);
- return;
-
- case NAND_CMD_RESET:
- if (chip->dev_ready)
- break;
- udelay(chip->chip_delay);
- chip->cmd_ctrl(mtd, NAND_CMD_STATUS,
- NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
- chip->cmd_ctrl(mtd, NAND_CMD_NONE,
- NAND_NCE | NAND_CTRL_CHANGE);
- while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ;
- return;
-
- case NAND_CMD_RNDOUT:
- /* No ready / busy check necessary */
- chip->cmd_ctrl(mtd, NAND_CMD_RNDOUTSTART,
- NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
- chip->cmd_ctrl(mtd, NAND_CMD_NONE,
- NAND_NCE | NAND_CTRL_CHANGE);
- return;
-
- case NAND_CMD_READ0:
- chip->cmd_ctrl(mtd, NAND_CMD_READSTART,
- NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
- chip->cmd_ctrl(mtd, NAND_CMD_NONE,
- NAND_NCE | NAND_CTRL_CHANGE);
-
- /* This applies to read commands */
- default:
- /*
- * If we don't have access to the busy pin, we apply the given
- * command delay
- */
- if (!chip->dev_ready) {
- udelay(chip->chip_delay);
- return;
- }
- }
-
- /* Apply this short delay always to ensure that we do wait tWB in
- * any case on any machine. */
- ndelay(100);
-
- nand_wait_ready(mtd);
-}
-
-/**
- * nand_get_device - [GENERIC] Get chip for selected access
- * @chip: the nand chip descriptor
- * @mtd: MTD device structure
- * @new_state: the state which is requested
- *
- * Get the device and lock it for exclusive access
- */
-static int
-nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state)
-{
- retry:
- /* Hardware controller shared among independend devices */
- if (!chip->controller->active)
- chip->controller->active = chip;
-
- if (chip->controller->active == chip && chip->state == FL_READY) {
- chip->state = new_state;
- return 0;
- }
- if (new_state == FL_PM_SUSPENDED) {
- return (chip->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN;
- }
- goto retry;
-}
-
-/**
- * nand_wait - [DEFAULT] wait until the command is done
- * @mtd: MTD device structure
- * @chip: NAND chip structure
- *
- * Wait for command done. This applies to erase and program only
- * Erase can take up to 400ms and program up to 20ms according to
- * general NAND and SmartMedia specs
- */
-static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip)
-{
-
- uint64_t start = get_time_ns();
- uint64_t timeo;
- int status, state = chip->state;
-
- if (state == FL_ERASING)
- timeo = 400 * MSECOND;
- else
- timeo = 20 * MSECOND;
-
- led_trigger_event(nand_led_trigger, LED_FULL);
-
- /* Apply this short delay always to ensure that we do wait tWB in
- * any case on any machine. */
- ndelay(100);
-
- if ((state == FL_ERASING) && (chip->options & NAND_IS_AND))
- chip->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1);
- else
- chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
-
- while (!is_timeout(start, timeo)) {
- if (chip->dev_ready) {
- if (chip->dev_ready(mtd))
- break;
- } else {
- if (chip->read_byte(mtd) & NAND_STATUS_READY)
- break;
- }
- }
- led_trigger_event(nand_led_trigger, LED_OFF);
-
- status = (int)chip->read_byte(mtd);
- return status;
-}
-
-/**
- * nand_read_page_raw - [Intern] read raw page data without ecc
- * @mtd: mtd info structure
- * @chip: nand chip info structure
- * @buf: buffer to store read data
- */
-static int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
- uint8_t *buf)
-{
- chip->read_buf(mtd, buf, mtd->writesize);
- chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
- return 0;
-}
-
-/**
- * nand_read_page_swecc - [REPLACABLE] software ecc based page read function
- * @mtd: mtd info structure
- * @chip: nand chip info structure
- * @buf: buffer to store read data
- */
-static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip,
- uint8_t *buf)
-{
- int i, eccsize = chip->ecc.size;
- int eccbytes = chip->ecc.bytes;
- int eccsteps = chip->ecc.steps;
- uint8_t *p = buf;
- uint8_t *ecc_calc = chip->buffers->ecccalc;
- uint8_t *ecc_code = chip->buffers->ecccode;
- uint32_t *eccpos = chip->ecc.layout->eccpos;
-
- chip->ecc.read_page_raw(mtd, chip, buf);
-
- for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
- chip->ecc.calculate(mtd, p, &ecc_calc[i]);
-
- for (i = 0; i < chip->ecc.total; i++)
- ecc_code[i] = chip->oob_poi[eccpos[i]];
-
- eccsteps = chip->ecc.steps;
- p = buf;
-
- for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
- int stat;
-
- stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
- if (stat < 0)
- mtd->ecc_stats.failed++;
- else
- mtd->ecc_stats.corrected += stat;
- }
- return 0;
-}
-
-/**
- * nand_read_page_hwecc - [REPLACABLE] hardware ecc based page read function
- * @mtd: mtd info structure
- * @chip: nand chip info structure
- * @buf: buffer to store read data
- *
- * Not for syndrome calculating ecc controllers which need a special oob layout
- */
-static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
- uint8_t *buf)
-{
- int i, eccsize = chip->ecc.size;
- int eccbytes = chip->ecc.bytes;
- int eccsteps = chip->ecc.steps;
- uint8_t *p = buf;
- uint8_t *ecc_calc = chip->buffers->ecccalc;
- uint8_t *ecc_code = chip->buffers->ecccode;
- uint32_t *eccpos = chip->ecc.layout->eccpos;
-
- for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
- chip->ecc.hwctl(mtd, NAND_ECC_READ);
- chip->read_buf(mtd, p, eccsize);
- chip->ecc.calculate(mtd, p, &ecc_calc[i]);
- }
- chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
-
- for (i = 0; i < chip->ecc.total; i++)
- ecc_code[i] = chip->oob_poi[eccpos[i]];
-
- eccsteps = chip->ecc.steps;
- p = buf;
-
- for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
- int stat;
-
- stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
- if (stat < 0)
- mtd->ecc_stats.failed++;
- else
- mtd->ecc_stats.corrected += stat;
- }
- return 0;
-}
-
-/**
- * nand_read_page_syndrome - [REPLACABLE] hardware ecc syndrom based page read
- * @mtd: mtd info structure
- * @chip: nand chip info structure
- * @buf: buffer to store read data
- *
- * The hw generator calculates the error syndrome automatically. Therefor
- * we need a special oob layout and handling.
- */
-static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
- uint8_t *buf)
-{
- int i, eccsize = chip->ecc.size;
- int eccbytes = chip->ecc.bytes;
- int eccsteps = chip->ecc.steps;
- uint8_t *p = buf;
- uint8_t *oob = chip->oob_poi;
-
- for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
- int stat;
-
- chip->ecc.hwctl(mtd, NAND_ECC_READ);
- chip->read_buf(mtd, p, eccsize);
-
- if (chip->ecc.prepad) {
- chip->read_buf(mtd, oob, chip->ecc.prepad);
- oob += chip->ecc.prepad;
- }
-
- chip->ecc.hwctl(mtd, NAND_ECC_READSYN);
- chip->read_buf(mtd, oob, eccbytes);
- stat = chip->ecc.correct(mtd, p, oob, NULL);
-
- if (stat < 0)
- mtd->ecc_stats.failed++;
- else
- mtd->ecc_stats.corrected += stat;
-
- oob += eccbytes;
-
- if (chip->ecc.postpad) {
- chip->read_buf(mtd, oob, chip->ecc.postpad);
- oob += chip->ecc.postpad;
- }
- }
-
- /* Calculate remaining oob bytes */
- i = mtd->oobsize - (oob - chip->oob_poi);
- if (i)
- chip->read_buf(mtd, oob, i);
-
- return 0;
-}
-
-/**
- * nand_transfer_oob - [Internal] Transfer oob to client buffer
- * @chip: nand chip structure
- * @oob: oob destination address
- * @ops: oob ops structure
- * @len: size of oob to transfer
- */
-static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob,
- struct mtd_oob_ops *ops, size_t len)
-{
- switch(ops->mode) {
-
- case MTD_OOB_PLACE:
- case MTD_OOB_RAW:
- memcpy(oob, chip->oob_poi + ops->ooboffs, len);
- return oob + len;
-
- case MTD_OOB_AUTO: {
- struct nand_oobfree *free = chip->ecc.layout->oobfree;
- uint32_t boffs = 0, roffs = ops->ooboffs;
- size_t bytes = 0;
-
- for(; free->length && len; free++, len -= bytes) {
- /* Read request not from offset 0 ? */
- if (unlikely(roffs)) {
- if (roffs >= free->length) {
- roffs -= free->length;
- continue;
- }
- boffs = free->offset + roffs;
- bytes = min_t(size_t, len,
- (free->length - roffs));
- roffs = 0;
- } else {
- bytes = min_t(size_t, len, free->length);
- boffs = free->offset;
- }
- memcpy(oob, chip->oob_poi + boffs, bytes);
- oob += bytes;
- }
- return oob;
- }
- default:
- BUG();
- }
- return NULL;
-}
-
-/**
- * nand_do_read_ops - [Internal] Read data with ECC
- *
- * @mtd: MTD device structure
- * @from: offset to read from
- * @ops: oob ops structure
- *
- * Internal function. Called with chip held.
- */
-static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
- struct mtd_oob_ops *ops)
-{
- int chipnr, page, realpage, col, bytes, aligned;
- struct nand_chip *chip = mtd->priv;
- struct mtd_ecc_stats stats;
- int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
- int sndcmd = 1;
- int ret = 0;
- uint32_t readlen = ops->len;
- uint32_t oobreadlen = ops->ooblen;
- uint8_t *bufpoi, *oob, *buf;
-
- stats = mtd->ecc_stats;
-
- chipnr = (int)(from >> chip->chip_shift);
- chip->select_chip(mtd, chipnr);
-
- realpage = (int)(from >> chip->page_shift);
- page = realpage & chip->pagemask;
-
- col = (int)(from & (mtd->writesize - 1));
-
- buf = ops->datbuf;
- oob = ops->oobbuf;
-
- while(1) {
- bytes = min(mtd->writesize - col, readlen);
- aligned = (bytes == mtd->writesize);
-
- /* Is the current page in the buffer ? */
- if (realpage != chip->pagebuf || oob) {
- bufpoi = aligned ? buf : chip->buffers->databuf;
-
- if (likely(sndcmd)) {
- chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
- sndcmd = 0;
- }
-
- /* Now read the page into the buffer */
- if (unlikely(ops->mode == MTD_OOB_RAW))
- ret = chip->ecc.read_page_raw(mtd, chip, bufpoi);
- else
- ret = chip->ecc.read_page(mtd, chip, bufpoi);
- if (ret < 0)
- break;
-
- /* Transfer not aligned data */
- if (!aligned) {
- chip->pagebuf = realpage;
- memcpy(buf, chip->buffers->databuf + col, bytes);
- }
-
- buf += bytes;
-
- if (unlikely(oob)) {
- /* Raw mode does data:oob:data:oob */
- if (ops->mode != MTD_OOB_RAW) {
- int toread = min(oobreadlen,
- chip->ecc.layout->oobavail);
- if (toread) {
- oob = nand_transfer_oob(chip,
- oob, ops, toread);
- oobreadlen -= toread;
- }
- } else
- buf = nand_transfer_oob(chip,
- buf, ops, mtd->oobsize);
- }
-
- if (!(chip->options & NAND_NO_READRDY)) {
- /*
- * Apply delay or wait for ready/busy pin. Do
- * this before the AUTOINCR check, so no
- * problems arise if a chip which does auto
- * increment is marked as NOAUTOINCR by the
- * board driver.
- */
- if (!chip->dev_ready)
- udelay(chip->chip_delay);
- else
- nand_wait_ready(mtd);
- }
- } else {
- memcpy(buf, chip->buffers->databuf + col, bytes);
- buf += bytes;
- }
-
- readlen -= bytes;
-
- if (!readlen)
- break;
-
- /* For subsequent reads align to page boundary. */
- col = 0;
- /* Increment page address */
- realpage++;
-
- page = realpage & chip->pagemask;
- /* Check, if we cross a chip boundary */
- if (!page) {
- chipnr++;
- chip->select_chip(mtd, -1);
- chip->select_chip(mtd, chipnr);
- }
-
- /* Check, if the chip supports auto page increment
- * or if we have hit a block boundary.
- */
- if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck))
- sndcmd = 1;
- }
-
- ops->retlen = ops->len - (size_t) readlen;
- if (oob)
- ops->oobretlen = ops->ooblen - oobreadlen;
-
- if (ret)
- return ret;
-
- if (mtd->ecc_stats.failed - stats.failed)
- return -EBADMSG;
-
- return 0;
-}
-
-/**
- * nand_read - [MTD Interface] MTD compability function for nand_do_read_ecc
- * @mtd: MTD device structure
- * @from: offset to read from
- * @len: number of bytes to read
- * @retlen: pointer to variable to store the number of read bytes
- * @buf: the databuffer to put data
- *
- * Get hold of the chip and call nand_do_read
- */
-static int nand_read(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, uint8_t *buf)
-{
- struct nand_chip *chip = mtd->priv;
- int ret;
-
- /* Do not allow reads past end of device */
- if ((from + len) > mtd->size)
- return -EINVAL;
- if (!len)
- return 0;
-
- nand_get_device(chip, mtd, FL_READING);
-
- chip->ops.len = len;
- chip->ops.datbuf = buf;
- chip->ops.oobbuf = NULL;
-
- ret = nand_do_read_ops(mtd, from, &chip->ops);
-
- *retlen = chip->ops.retlen;
-
- nand_release_device(mtd);
-
- return ret;
-}
-
-/**
- * nand_read_oob_std - [REPLACABLE] the most common OOB data read function
- * @mtd: mtd info structure
- * @chip: nand chip info structure
- * @page: page number to read
- * @sndcmd: flag whether to issue read command or not
- */
-static int nand_read_oob_std(struct mtd_info *mtd, struct nand_chip *chip,
- int page, int sndcmd)
-{
- if (sndcmd) {
- chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
- sndcmd = 0;
- }
- chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
- return sndcmd;
-}
-
-/**
- * nand_read_oob_syndrome - [REPLACABLE] OOB data read function for HW ECC
- * with syndromes
- * @mtd: mtd info structure
- * @chip: nand chip info structure
- * @page: page number to read
- * @sndcmd: flag whether to issue read command or not
- */
-static int nand_read_oob_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
- int page, int sndcmd)
-{
- uint8_t *buf = chip->oob_poi;
- int length = mtd->oobsize;
- int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad;
- int eccsize = chip->ecc.size;
- uint8_t *bufpoi = buf;
- int i, toread, sndrnd = 0, pos;
-
- chip->cmdfunc(mtd, NAND_CMD_READ0, chip->ecc.size, page);
- for (i = 0; i < chip->ecc.steps; i++) {
- if (sndrnd) {
- pos = eccsize + i * (eccsize + chunk);
- if (mtd->writesize > 512)
- chip->cmdfunc(mtd, NAND_CMD_RNDOUT, pos, -1);
- else
- chip->cmdfunc(mtd, NAND_CMD_READ0, pos, page);
- } else
- sndrnd = 1;
- toread = min_t(int, length, chunk);
- chip->read_buf(mtd, bufpoi, toread);
- bufpoi += toread;
- length -= toread;
- }
- if (length > 0)
- chip->read_buf(mtd, bufpoi, length);
-
- return 1;
-}
-
-/**
- * nand_write_oob_std - [REPLACABLE] the most common OOB data write function
- * @mtd: mtd info structure
- * @chip: nand chip info structure
- * @page: page number to write
- */
-static int nand_write_oob_std(struct mtd_info *mtd, struct nand_chip *chip,
- int page)
-{
- int status = 0;
- const uint8_t *buf = chip->oob_poi;
- int length = mtd->oobsize;
-
- chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page);
- chip->write_buf(mtd, buf, length);
- /* Send command to program the OOB data */
- chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
-
- status = chip->waitfunc(mtd, chip);
-
- return status & NAND_STATUS_FAIL ? -EIO : 0;
-}
-
-/**
- * nand_write_oob_syndrome - [REPLACABLE] OOB data write function for HW ECC
- * with syndrome - only for large page flash !
- * @mtd: mtd info structure
- * @chip: nand chip info structure
- * @page: page number to write
- */
-static int nand_write_oob_syndrome(struct mtd_info *mtd,
- struct nand_chip *chip, int page)
-{
- int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad;
- int eccsize = chip->ecc.size, length = mtd->oobsize;
- int i, len, pos, status = 0, sndcmd = 0, steps = chip->ecc.steps;
- const uint8_t *bufpoi = chip->oob_poi;
-
- /*
- * data-ecc-data-ecc ... ecc-oob
- * or
- * data-pad-ecc-pad-data-pad .... ecc-pad-oob
- */
- if (!chip->ecc.prepad && !chip->ecc.postpad) {
- pos = steps * (eccsize + chunk);
- steps = 0;
- } else
- pos = eccsize;
-
- chip->cmdfunc(mtd, NAND_CMD_SEQIN, pos, page);
- for (i = 0; i < steps; i++) {
- if (sndcmd) {
- if (mtd->writesize <= 512) {
- uint32_t fill = 0xFFFFFFFF;
-
- len = eccsize;
- while (len > 0) {
- int num = min_t(int, len, 4);
- chip->write_buf(mtd, (uint8_t *)&fill,
- num);
- len -= num;
- }
- } else {
- pos = eccsize + i * (eccsize + chunk);
- chip->cmdfunc(mtd, NAND_CMD_RNDIN, pos, -1);
- }
- } else
- sndcmd = 1;
- len = min_t(int, length, chunk);
- chip->write_buf(mtd, bufpoi, len);
- bufpoi += len;
- length -= len;
- }
- if (length > 0)
- chip->write_buf(mtd, bufpoi, length);
-
- chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
- status = chip->waitfunc(mtd, chip);
-
- return status & NAND_STATUS_FAIL ? -EIO : 0;
-}
-
-/**
- * nand_do_read_oob - [Intern] NAND read out-of-band
- * @mtd: MTD device structure
- * @from: offset to read from
- * @ops: oob operations description structure
- *
- * NAND read out-of-band data from the spare area
- */
-static int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
- struct mtd_oob_ops *ops)
-{
- int page, realpage, chipnr, sndcmd = 1;
- struct nand_chip *chip = mtd->priv;
- int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
- int readlen = ops->ooblen;
- int len;
- uint8_t *buf = ops->oobbuf;
-
- MTD_DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08Lx, len = %i\n",
- (unsigned long long)from, readlen);
-
- if (ops->mode == MTD_OOB_AUTO)
- len = chip->ecc.layout->oobavail;
- else
- len = mtd->oobsize;
-
- if (unlikely(ops->ooboffs >= len)) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
- "Attempt to start read outside oob\n");
- return -EINVAL;
- }
-
- /* Do not allow reads past end of device */
- if (unlikely(from >= mtd->size ||
- ops->ooboffs + readlen > ((mtd->size >> chip->page_shift) -
- (from >> chip->page_shift)) * len)) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
- "Attempt read beyond end of device\n");
- return -EINVAL;
- }
-
- chipnr = (int)(from >> chip->chip_shift);
- chip->select_chip(mtd, chipnr);
-
- /* Shift to get page */
- realpage = (int)(from >> chip->page_shift);
- page = realpage & chip->pagemask;
-
- while(1) {
- sndcmd = chip->ecc.read_oob(mtd, chip, page, sndcmd);
-
- len = min(len, readlen);
- buf = nand_transfer_oob(chip, buf, ops, len);
-
- if (!(chip->options & NAND_NO_READRDY)) {
- /*
- * Apply delay or wait for ready/busy pin. Do this
- * before the AUTOINCR check, so no problems arise if a
- * chip which does auto increment is marked as
- * NOAUTOINCR by the board driver.
- */
- if (!chip->dev_ready)
- udelay(chip->chip_delay);
- else
- nand_wait_ready(mtd);
- }
-
- readlen -= len;
- if (!readlen)
- break;
-
- /* Increment page address */
- realpage++;
-
- page = realpage & chip->pagemask;
- /* Check, if we cross a chip boundary */
- if (!page) {
- chipnr++;
- chip->select_chip(mtd, -1);
- chip->select_chip(mtd, chipnr);
- }
-
- /* Check, if the chip supports auto page increment
- * or if we have hit a block boundary.
- */
- if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck))
- sndcmd = 1;
- }
-
- ops->oobretlen = ops->ooblen;
- return 0;
-}
-
-/**
- * nand_read_oob - [MTD Interface] NAND read data and/or out-of-band
- * @mtd: MTD device structure
- * @from: offset to read from
- * @ops: oob operation description structure
- *
- * NAND read data and/or out-of-band data
- */
-static int nand_read_oob(struct mtd_info *mtd, loff_t from,
- struct mtd_oob_ops *ops)
-{
- struct nand_chip *chip = mtd->priv;
- int ret = -ENOSYS;
-
- ops->retlen = 0;
-
- /* Do not allow reads past end of device */
- if (ops->datbuf && (from + ops->len) > mtd->size) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
- "Attempt read beyond end of device\n");
- return -EINVAL;
- }
-
- nand_get_device(chip, mtd, FL_READING);
-
- switch(ops->mode) {
- case MTD_OOB_PLACE:
- case MTD_OOB_AUTO:
- case MTD_OOB_RAW:
- break;
-
- default:
- goto out;
- }
-
- if (!ops->datbuf)
- ret = nand_do_read_oob(mtd, from, ops);
- else
- ret = nand_do_read_ops(mtd, from, ops);
-
- out:
- nand_release_device(mtd);
- return ret;
-}
-
-
-/**
- * nand_write_page_raw - [Intern] raw page write function
- * @mtd: mtd info structure
- * @chip: nand chip info structure
- * @buf: data buffer
- */
-static void nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
- const uint8_t *buf)
-{
- chip->write_buf(mtd, buf, mtd->writesize);
- chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
-}
-
-/**
- * nand_write_page_swecc - [REPLACABLE] software ecc based page write function
- * @mtd: mtd info structure
- * @chip: nand chip info structure
- * @buf: data buffer
- */
-static void nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip,
- const uint8_t *buf)
-{
- int i, eccsize = chip->ecc.size;
- int eccbytes = chip->ecc.bytes;
- int eccsteps = chip->ecc.steps;
- uint8_t *ecc_calc = chip->buffers->ecccalc;
- const uint8_t *p = buf;
- uint32_t *eccpos = chip->ecc.layout->eccpos;
-
- /* Software ecc calculation */
- for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
- chip->ecc.calculate(mtd, p, &ecc_calc[i]);
-
- for (i = 0; i < chip->ecc.total; i++)
- chip->oob_poi[eccpos[i]] = ecc_calc[i];
-
- chip->ecc.write_page_raw(mtd, chip, buf);
-}
-
-/**
- * nand_write_page_hwecc - [REPLACABLE] hardware ecc based page write function
- * @mtd: mtd info structure
- * @chip: nand chip info structure
- * @buf: data buffer
- */
-static void nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
- const uint8_t *buf)
-{
- int i, eccsize = chip->ecc.size;
- int eccbytes = chip->ecc.bytes;
- int eccsteps = chip->ecc.steps;
- uint8_t *ecc_calc = chip->buffers->ecccalc;
- const uint8_t *p = buf;
- uint32_t *eccpos = chip->ecc.layout->eccpos;
-
- for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
- chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
- chip->write_buf(mtd, p, eccsize);
- chip->ecc.calculate(mtd, p, &ecc_calc[i]);
- }
-
- for (i = 0; i < chip->ecc.total; i++)
- chip->oob_poi[eccpos[i]] = ecc_calc[i];
-
- chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
-}
-
-/**
- * nand_write_page_syndrome - [REPLACABLE] hardware ecc syndrom based page write
- * @mtd: mtd info structure
- * @chip: nand chip info structure
- * @buf: data buffer
- *
- * The hw generator calculates the error syndrome automatically. Therefor
- * we need a special oob layout and handling.
- */
-static void nand_write_page_syndrome(struct mtd_info *mtd,
- struct nand_chip *chip, const uint8_t *buf)
-{
- int i, eccsize = chip->ecc.size;
- int eccbytes = chip->ecc.bytes;
- int eccsteps = chip->ecc.steps;
- const uint8_t *p = buf;
- uint8_t *oob = chip->oob_poi;
-
- for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
-
- chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
- chip->write_buf(mtd, p, eccsize);
-
- if (chip->ecc.prepad) {
- chip->write_buf(mtd, oob, chip->ecc.prepad);
- oob += chip->ecc.prepad;
- }
-
- chip->ecc.calculate(mtd, p, oob);
- chip->write_buf(mtd, oob, eccbytes);
- oob += eccbytes;
-
- if (chip->ecc.postpad) {
- chip->write_buf(mtd, oob, chip->ecc.postpad);
- oob += chip->ecc.postpad;
- }
- }
-
- /* Calculate remaining oob bytes */
- i = mtd->oobsize - (oob - chip->oob_poi);
- if (i)
- chip->write_buf(mtd, oob, i);
-}
-
-/**
- * nand_write_page - [REPLACEABLE] write one page
- * @mtd: MTD device structure
- * @chip: NAND chip descriptor
- * @buf: the data to write
- * @page: page number to write
- * @cached: cached programming
- * @raw: use _raw version of write_page
- */
-static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
- const uint8_t *buf, int page, int cached, int raw)
-{
- int status;
-
- chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
-
- if (unlikely(raw))
- chip->ecc.write_page_raw(mtd, chip, buf);
- else
- chip->ecc.write_page(mtd, chip, buf);
-
- /*
- * Cached progamming disabled for now, Not sure if its worth the
- * trouble. The speed gain is not very impressive. (2.3->2.6Mib/s)
- */
- cached = 0;
-
- if (!cached || !(chip->options & NAND_CACHEPRG)) {
-
- chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
- status = chip->waitfunc(mtd, chip);
- /*
- * See if operation failed and additional status checks are
- * available
- */
- if ((status & NAND_STATUS_FAIL) && (chip->errstat))
- status = chip->errstat(mtd, chip, FL_WRITING, status,
- page);
-
- if (status & NAND_STATUS_FAIL) {
- return -EIO;
- }
- } else {
- chip->cmdfunc(mtd, NAND_CMD_CACHEDPROG, -1, -1);
- status = chip->waitfunc(mtd, chip);
- }
-
-#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
- /* Send command to read back the data */
- chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
-
- if (chip->verify_buf(mtd, buf, mtd->writesize))
- return -EIO;
-#endif
- return 0;
-}
-
-/**
- * nand_fill_oob - [Internal] Transfer client buffer to oob
- * @chip: nand chip structure
- * @oob: oob data buffer
- * @ops: oob ops structure
- */
-static uint8_t *nand_fill_oob(struct nand_chip *chip, uint8_t *oob,
- struct mtd_oob_ops *ops)
-{
- size_t len = ops->ooblen;
-
- switch(ops->mode) {
-
- case MTD_OOB_PLACE:
- case MTD_OOB_RAW:
- memcpy(chip->oob_poi + ops->ooboffs, oob, len);
- return oob + len;
-
- case MTD_OOB_AUTO: {
- struct nand_oobfree *free = chip->ecc.layout->oobfree;
- uint32_t boffs = 0, woffs = ops->ooboffs;
- size_t bytes = 0;
-
- for(; free->length && len; free++, len -= bytes) {
- /* Write request not from offset 0 ? */
- if (unlikely(woffs)) {
- if (woffs >= free->length) {
- woffs -= free->length;
- continue;
- }
- boffs = free->offset + woffs;
- bytes = min_t(size_t, len,
- (free->length - woffs));
- woffs = 0;
- } else {
- bytes = min_t(size_t, len, free->length);
- boffs = free->offset;
- }
- memcpy(chip->oob_poi + boffs, oob, bytes);
- oob += bytes;
- }
- return oob;
- }
- default:
- BUG();
- }
- return NULL;
-}
-
-#define NOTALIGNED(x) (x & (chip->subpagesize - 1)) != 0
-
-/**
- * nand_do_write_ops - [Internal] NAND write with ECC
- * @mtd: MTD device structure
- * @to: offset to write to
- * @ops: oob operations description structure
- *
- * NAND write with ECC
- */
-static int nand_do_write_ops(struct mtd_info *mtd, loff_t to,
- struct mtd_oob_ops *ops)
-{
- int chipnr, realpage, page, blockmask, column;
- struct nand_chip *chip = mtd->priv;
- uint32_t writelen = ops->len;
- uint8_t *oob = ops->oobbuf;
- uint8_t *buf = ops->datbuf;
- int ret, subpage;
-
- ops->retlen = 0;
- if (!writelen)
- return 0;
-
- /* reject writes, which are not page aligned */
- if (NOTALIGNED(to) || NOTALIGNED(ops->len)) {
- printk(KERN_NOTICE "nand_write: "
- "Attempt to write not page aligned data\n");
- return -EINVAL;
- }
-
- column = to & (mtd->writesize - 1);
- subpage = column || (writelen & (mtd->writesize - 1));
-
- if (subpage && oob)
- return -EINVAL;
-
- chipnr = (int)(to >> chip->chip_shift);
- chip->select_chip(mtd, chipnr);
-
- /* Check, if it is write protected */
- if (nand_check_wp(mtd)) {
- return -EIO;
- }
-
- realpage = (int)(to >> chip->page_shift);
- page = realpage & chip->pagemask;
- blockmask = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
-
- /* Invalidate the page cache, when we write to the cached page */
- if (to <= (chip->pagebuf << chip->page_shift) &&
- (chip->pagebuf << chip->page_shift) < (to + ops->len))
- chip->pagebuf = -1;
-
- /* If we're not given explicit OOB data, let it be 0xFF */
- if (likely(!oob))
- memset(chip->oob_poi, 0xff, mtd->oobsize);
-
- while(1) {
- int bytes = mtd->writesize;
- int cached = writelen > bytes && page != blockmask;
- uint8_t *wbuf = buf;
-
- /* Partial page write ? */
- if (unlikely(column || writelen < (mtd->writesize - 1))) {
- cached = 0;
- bytes = min_t(int, bytes - column, (int) writelen);
- chip->pagebuf = -1;
- memset(chip->buffers->databuf, 0xff, mtd->writesize);
- memcpy(&chip->buffers->databuf[column], buf, bytes);
- wbuf = chip->buffers->databuf;
- }
-
- if (unlikely(oob))
- oob = nand_fill_oob(chip, oob, ops);
-
- ret = chip->write_page(mtd, chip, wbuf, page, cached,
- (ops->mode == MTD_OOB_RAW));
- if (ret)
- break;
-
- writelen -= bytes;
- if (!writelen)
- break;
-
- column = 0;
- buf += bytes;
- realpage++;
-
- page = realpage & chip->pagemask;
- /* Check, if we cross a chip boundary */
- if (!page) {
- chipnr++;
- chip->select_chip(mtd, -1);
- chip->select_chip(mtd, chipnr);
- }
- }
-
- ops->retlen = ops->len - writelen;
- if (unlikely(oob))
- ops->oobretlen = ops->ooblen;
- return ret;
-}
-
-/**
- * nand_write - [MTD Interface] NAND write with ECC
- * @mtd: MTD device structure
- * @to: offset to write to
- * @len: number of bytes to write
- * @retlen: pointer to variable to store the number of written bytes
- * @buf: the data to write
- *
- * NAND write with ECC
- */
-static int nand_write(struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const uint8_t *buf)
-{
- struct nand_chip *chip = mtd->priv;
- int ret;
-
- /* Do not allow reads past end of device */
- if ((to + len) > mtd->size)
- return -EINVAL;
- if (!len)
- return 0;
-
- nand_get_device(chip, mtd, FL_WRITING);
-
- chip->ops.len = len;
- chip->ops.datbuf = (uint8_t *)buf;
- chip->ops.oobbuf = NULL;
-
- ret = nand_do_write_ops(mtd, to, &chip->ops);
-
- *retlen = chip->ops.retlen;
-
- nand_release_device(mtd);
-
- return ret;
-}
-
-/**
- * nand_do_write_oob - [MTD Interface] NAND write out-of-band
- * @mtd: MTD device structure
- * @to: offset to write to
- * @ops: oob operation description structure
- *
- * NAND write out-of-band
- */
-static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
- struct mtd_oob_ops *ops)
-{
- int chipnr, page, status, len;
- struct nand_chip *chip = mtd->priv;
-
- MTD_DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n",
- (unsigned int)to, (int)ops->ooblen);
-
- if (ops->mode == MTD_OOB_AUTO)
- len = chip->ecc.layout->oobavail;
- else
- len = mtd->oobsize;
-
- /* Do not allow write past end of page */
- if ((ops->ooboffs + ops->ooblen) > len) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: "
- "Attempt to write past end of page\n");
- return -EINVAL;
- }
-
- if (unlikely(ops->ooboffs >= len)) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
- "Attempt to start write outside oob\n");
- return -EINVAL;
- }
-
- /* Do not allow reads past end of device */
- if (unlikely(to >= mtd->size ||
- ops->ooboffs + ops->ooblen >
- ((mtd->size >> chip->page_shift) -
- (to >> chip->page_shift)) * len)) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
- "Attempt write beyond end of device\n");
- return -EINVAL;
- }
-
- chipnr = (int)(to >> chip->chip_shift);
- chip->select_chip(mtd, chipnr);
-
- /* Shift to get page */
- page = (int)(to >> chip->page_shift);
-
- /*
- * Reset the chip. Some chips (like the Toshiba TC5832DC found in one
- * of my DiskOnChip 2000 test units) will clear the whole data page too
- * if we don't do this. I have no clue why, but I seem to have 'fixed'
- * it in the doc2000 driver in August 1999. dwmw2.
- */
- chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
-
- /* Check, if it is write protected */
- if (nand_check_wp(mtd))
- return -EROFS;
-
- /* Invalidate the page cache, if we write to the cached page */
- if (page == chip->pagebuf)
- chip->pagebuf = -1;
-
- memset(chip->oob_poi, 0xff, mtd->oobsize);
- nand_fill_oob(chip, ops->oobbuf, ops);
- status = chip->ecc.write_oob(mtd, chip, page & chip->pagemask);
- memset(chip->oob_poi, 0xff, mtd->oobsize);
-
- if (status)
- return status;
-
- ops->oobretlen = ops->ooblen;
-
- return 0;
-}
-
-/**
- * nand_write_oob - [MTD Interface] NAND write data and/or out-of-band
- * @mtd: MTD device structure
- * @to: offset to write to
- * @ops: oob operation description structure
- */
-static int nand_write_oob(struct mtd_info *mtd, loff_t to,
- struct mtd_oob_ops *ops)
-{
- struct nand_chip *chip = mtd->priv;
- int ret = -ENOSYS;
-
- ops->retlen = 0;
-
- /* Do not allow writes past end of device */
- if (ops->datbuf && (to + ops->len) > mtd->size) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
- "Attempt read beyond end of device\n");
- return -EINVAL;
- }
-
- nand_get_device(chip, mtd, FL_WRITING);
-
- switch(ops->mode) {
- case MTD_OOB_PLACE:
- case MTD_OOB_AUTO:
- case MTD_OOB_RAW:
- break;
-
- default:
- goto out;
- }
-
- if (!ops->datbuf)
- ret = nand_do_write_oob(mtd, to, ops);
- else
- ret = nand_do_write_ops(mtd, to, ops);
-
- out:
- nand_release_device(mtd);
- return ret;
-}
-
-/**
- * single_erease_cmd - [GENERIC] NAND standard block erase command function
- * @mtd: MTD device structure
- * @page: the page address of the block which will be erased
- *
- * Standard erase command for NAND chips
- */
-static void single_erase_cmd(struct mtd_info *mtd, int page)
-{
- struct nand_chip *chip = mtd->priv;
- /* Send commands to erase a block */
- chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page);
- chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1);
-}
-
-/**
- * multi_erease_cmd - [GENERIC] AND specific block erase command function
- * @mtd: MTD device structure
- * @page: the page address of the block which will be erased
- *
- * AND multi block erase command function
- * Erase 4 consecutive blocks
- */
-static void multi_erase_cmd(struct mtd_info *mtd, int page)
-{
- struct nand_chip *chip = mtd->priv;
- /* Send commands to erase a block */
- chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++);
- chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++);
- chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++);
- chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page);
- chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1);
-}
-
-/**
- * nand_erase - [MTD Interface] erase block(s)
- * @mtd: MTD device structure
- * @instr: erase instruction
- *
- * Erase one ore more blocks
- */
-static int nand_erase(struct mtd_info *mtd, struct erase_info *instr)
-{
- return nand_erase_nand(mtd, instr, 0);
-}
-
-#define BBT_PAGE_MASK 0xffffff3f
-/**
- * nand_erase_nand - [Internal] erase block(s)
- * @mtd: MTD device structure
- * @instr: erase instruction
- * @allowbbt: allow erasing the bbt area
- *
- * Erase one ore more blocks
- */
-int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
- int allowbbt)
-{
- int page, len, status, pages_per_block, ret, chipnr;
- struct nand_chip *chip = mtd->priv;
- int rewrite_bbt[NAND_MAX_CHIPS]={0};
- unsigned int bbt_masked_page = 0xffffffff;
-
- MTD_DEBUG(MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%08x, len = %i\n",
- (unsigned int)instr->addr, (unsigned int)instr->len);
-
- /* Start address must align on block boundary */
- if (instr->addr & ((1 << chip->phys_erase_shift) - 1)) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Unaligned address\n");
- return -EINVAL;
- }
-
- /* Length must align on block boundary */
- if (instr->len & ((1 << chip->phys_erase_shift) - 1)) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
- "Length not block aligned\n");
- return -EINVAL;
- }
-
- /* Do not allow erase past end of device */
- if ((instr->len + instr->addr) > mtd->size) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
- "Erase past end of device\n");
- return -EINVAL;
- }
-
- instr->fail_addr = 0xffffffff;
-
- /* Grab the lock and see if the device is available */
- nand_get_device(chip, mtd, FL_ERASING);
-
- /* Shift to get first page */
- page = (int)(instr->addr >> chip->page_shift);
- chipnr = (int)(instr->addr >> chip->chip_shift);
-
- /* Calculate pages in each block */
- pages_per_block = 1 << (chip->phys_erase_shift - chip->page_shift);
-
- /* Select the NAND device */
- chip->select_chip(mtd, chipnr);
-
- /* Check, if it is write protected */
- if (nand_check_wp(mtd)) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
- "Device is write protected!!!\n");
- instr->state = MTD_ERASE_FAILED;
- goto erase_exit;
- }
-
- /*
- * If BBT requires refresh, set the BBT page mask to see if the BBT
- * should be rewritten. Otherwise the mask is set to 0xffffffff which
- * can not be matched. This is also done when the bbt is actually
- * erased to avoid recusrsive updates
- */
- if (chip->options & BBT_AUTO_REFRESH && !allowbbt)
- bbt_masked_page = chip->bbt_td->pages[chipnr] & BBT_PAGE_MASK;
-
- /* Loop through the pages */
- len = instr->len;
-
- instr->state = MTD_ERASING;
-
- while (len) {
- /*
- * heck if we have a bad block, we do not erase bad blocks !
- */
- if (nand_block_checkbad(mtd, ((loff_t) page) <<
- chip->page_shift, 0, allowbbt)) {
- printk(KERN_WARNING "nand_erase: attempt to erase a "
- "bad block at page 0x%08x\n", page);
- instr->state = MTD_ERASE_FAILED;
- goto erase_exit;
- }
-
- /*
- * Invalidate the page cache, if we erase the block which
- * contains the current cached page
- */
- if (page <= chip->pagebuf && chip->pagebuf <
- (page + pages_per_block))
- chip->pagebuf = -1;
-
- chip->erase_cmd(mtd, page & chip->pagemask);
-
- status = chip->waitfunc(mtd, chip);
-
- /*
- * See if operation failed and additional status checks are
- * available
- */
- if ((status & NAND_STATUS_FAIL) && (chip->errstat))
- status = chip->errstat(mtd, chip, FL_ERASING,
- status, page);
-
- /* See if block erase succeeded */
- if (status & NAND_STATUS_FAIL) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
- "Failed erase, page 0x%08x\n", page);
- instr->state = MTD_ERASE_FAILED;
- instr->fail_addr = (page << chip->page_shift);
- goto erase_exit;
- }
-
- /*
- * If BBT requires refresh, set the BBT rewrite flag to the
- * page being erased
- */
- if (bbt_masked_page != 0xffffffff &&
- (page & BBT_PAGE_MASK) == bbt_masked_page)
- rewrite_bbt[chipnr] = (page << chip->page_shift);
-
- /* Increment page address and decrement length */
- len -= (1 << chip->phys_erase_shift);
- page += pages_per_block;
-
- /* Check, if we cross a chip boundary */
- if (len && !(page & chip->pagemask)) {
- chipnr++;
- chip->select_chip(mtd, -1);
- chip->select_chip(mtd, chipnr);
-
- /*
- * If BBT requires refresh and BBT-PERCHIP, set the BBT
- * page mask to see if this BBT should be rewritten
- */
- if (bbt_masked_page != 0xffffffff &&
- (chip->bbt_td->options & NAND_BBT_PERCHIP))
- bbt_masked_page = chip->bbt_td->pages[chipnr] &
- BBT_PAGE_MASK;
- }
- }
- instr->state = MTD_ERASE_DONE;
-
- erase_exit:
-
- ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO;
-
- /* Deselect and wake up anyone waiting on the device */
- nand_release_device(mtd);
-
- /* Do call back function */
- if (!ret)
- mtd_erase_callback(instr);
-
- /*
- * If BBT requires refresh and erase was successful, rewrite any
- * selected bad block tables
- */
- if (bbt_masked_page == 0xffffffff || ret)
- return ret;
-
- for (chipnr = 0; chipnr < chip->numchips; chipnr++) {
- if (!rewrite_bbt[chipnr])
- continue;
- /* update the BBT for chip */
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "nand_erase_nand: nand_update_bbt "
- "(%d:0x%0x 0x%0x)\n", chipnr, rewrite_bbt[chipnr],
- chip->bbt_td->pages[chipnr]);
- nand_update_bbt(mtd, rewrite_bbt[chipnr]);
- }
-
- /* Return more or less happy */
- return ret;
-}
-
-/**
- * nand_sync - [MTD Interface] sync
- * @mtd: MTD device structure
- *
- * Sync is actually a wait for chip ready function
- */
-static void nand_sync(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd->priv;
-
- MTD_DEBUG(MTD_DEBUG_LEVEL3, "nand_sync: called\n");
-
- /* Grab the lock and see if the device is available */
- nand_get_device(chip, mtd, FL_SYNCING);
- /* Release it and go back */
- nand_release_device(mtd);
-}
-
-/**
- * nand_block_isbad - [MTD Interface] Check if block at offset is bad
- * @mtd: MTD device structure
- * @offs: offset relative to mtd start
- */
-static int nand_block_isbad(struct mtd_info *mtd, loff_t offs)
-{
- /* Check for invalid offset */
- if (offs > mtd->size)
- return -EINVAL;
-
- return nand_block_checkbad(mtd, offs, 1, 0);
-}
-
-/**
- * nand_block_markbad - [MTD Interface] Mark block at the given offset as bad
- * @mtd: MTD device structure
- * @ofs: offset relative to mtd start
- */
-static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
-{
- struct nand_chip *chip = mtd->priv;
- int ret;
-
- if ((ret = nand_block_isbad(mtd, ofs))) {
- /* If it was bad already, return success and do nothing. */
- if (ret > 0)
- return 0;
- return ret;
- }
-
- return chip->block_markbad(mtd, ofs);
-}
-
-/**
- * nand_suspend - [MTD Interface] Suspend the NAND flash
- * @mtd: MTD device structure
- */
-static int nand_suspend(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd->priv;
-
- return nand_get_device(chip, mtd, FL_PM_SUSPENDED);
-}
-
-/**
- * nand_resume - [MTD Interface] Resume the NAND flash
- * @mtd: MTD device structure
- */
-static void nand_resume(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd->priv;
-
- if (chip->state == FL_PM_SUSPENDED)
- nand_release_device(mtd);
- else
- printk(KERN_ERR "nand_resume() called for a chip which is not "
- "in suspended state\n");
-}
-
-/*
- * Set default functions
- */
-static void nand_set_defaults(struct nand_chip *chip, int busw)
-{
- /* check for proper chip_delay setup, set 20us if not */
- if (!chip->chip_delay)
- chip->chip_delay = 20;
-
- /* check, if a user supplied command function given */
- if (chip->cmdfunc == NULL)
- chip->cmdfunc = nand_command;
-
- /* check, if a user supplied wait function given */
- if (chip->waitfunc == NULL)
- chip->waitfunc = nand_wait;
-
- if (!chip->select_chip)
- chip->select_chip = nand_select_chip;
- if (!chip->read_byte)
- chip->read_byte = busw ? nand_read_byte16 : nand_read_byte;
- if (!chip->read_word)
- chip->read_word = nand_read_word;
- if (!chip->block_bad)
- chip->block_bad = nand_block_bad;
- if (!chip->block_markbad)
- chip->block_markbad = nand_default_block_markbad;
- if (!chip->write_buf)
- chip->write_buf = busw ? nand_write_buf16 : nand_write_buf;
- if (!chip->read_buf)
- chip->read_buf = busw ? nand_read_buf16 : nand_read_buf;
- if (!chip->verify_buf)
- chip->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf;
- if (!chip->scan_bbt)
- chip->scan_bbt = nand_default_bbt;
-
- if (!chip->controller) {
- chip->controller = &chip->hwcontrol;
- }
-
-}
-
-/*
- * Get the flash and manufacturer id and lookup if the type is supported
- */
-static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
- struct nand_chip *chip,
- int busw, int *maf_id)
-{
- struct nand_flash_dev *type = NULL;
- int i, dev_id, maf_idx;
- int tmp_id, tmp_manf;
-
- /* Select the device */
- chip->select_chip(mtd, 0);
-
- /* Send the command for reading device ID */
- chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
-
- /* Read manufacturer and device IDs */
- *maf_id = chip->read_byte(mtd);
- dev_id = chip->read_byte(mtd);
-
- /* Try again to make sure, as some systems the bus-hold or other
- * interface concerns can cause random data which looks like a
- * possibly credible NAND flash to appear. If the two results do
- * not match, ignore the device completely.
- */
-
- chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
-
- /* Read manufacturer and device IDs */
-
- tmp_manf = chip->read_byte(mtd);
- tmp_id = chip->read_byte(mtd);
-
- if (tmp_manf != *maf_id || tmp_id != dev_id) {
- printk(KERN_INFO "%s: second ID read did not match "
- "%02x,%02x against %02x,%02x\n", __func__,
- *maf_id, dev_id, tmp_manf, tmp_id);
- return ERR_PTR(-ENODEV);
- }
-
- /* Lookup the flash id */
- for (i = 0; nand_flash_ids[i].name != NULL; i++) {
- if (dev_id == nand_flash_ids[i].id) {
- type = &nand_flash_ids[i];
- break;
- }
- }
-
- if (!type)
- return ERR_PTR(-ENODEV);
-
- if (!mtd->name)
- mtd->name = type->name;
-
- chip->chipsize = type->chipsize << 20;
-
- /* Newer devices have all the information in additional id bytes */
- if (!type->pagesize) {
- int extid;
- /* The 3rd id byte holds MLC / multichip data */
- chip->cellinfo = chip->read_byte(mtd);
- /* The 4th id byte is the important one */
- extid = chip->read_byte(mtd);
- /* Calc pagesize */
- mtd->writesize = 1024 << (extid & 0x3);
- extid >>= 2;
- /* Calc oobsize */
- mtd->oobsize = (8 << (extid & 0x01)) * (mtd->writesize >> 9);
- extid >>= 2;
- /* Calc blocksize. Blocksize is multiples of 64KiB */
- mtd->erasesize = (64 * 1024) << (extid & 0x03);
- extid >>= 2;
- /* Get buswidth information */
- busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0;
-
- } else {
- /*
- * Old devices have chip data hardcoded in the device id table
- */
- mtd->erasesize = type->erasesize;
- mtd->writesize = type->pagesize;
- mtd->oobsize = mtd->writesize / 32;
- busw = type->options & NAND_BUSWIDTH_16;
- }
-
- /* Try to identify manufacturer */
- for (maf_idx = 0; nand_manuf_ids[maf_idx].id != 0x0; maf_idx++) {
- if (nand_manuf_ids[maf_idx].id == *maf_id)
- break;
- }
-
- /*
- * Check, if buswidth is correct. Hardware drivers should set
- * chip correct !
- */
- if (busw != (chip->options & NAND_BUSWIDTH_16)) {
- printk(KERN_INFO "NAND device: Manufacturer ID:"
- " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id,
- dev_id, nand_manuf_ids[maf_idx].name, mtd->name);
- printk(KERN_WARNING "NAND bus width %d instead %d bit\n",
- (chip->options & NAND_BUSWIDTH_16) ? 16 : 8,
- busw ? 16 : 8);
- return ERR_PTR(-EINVAL);
- }
-
- /* Calculate the address shift from the page size */
- chip->page_shift = ffs(mtd->writesize) - 1;
- /* Convert chipsize to number of pages per chip -1. */
- chip->pagemask = (chip->chipsize >> chip->page_shift) - 1;
-
- chip->bbt_erase_shift = chip->phys_erase_shift =
- ffs(mtd->erasesize) - 1;
- chip->chip_shift = ffs(chip->chipsize) - 1;
-
- /* Set the bad block position */
- chip->badblockpos = mtd->writesize > 512 ?
- NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS;
-
- /* Get chip options, preserve non chip based options */
- chip->options &= ~NAND_CHIPOPTIONS_MSK;
- chip->options |= type->options & NAND_CHIPOPTIONS_MSK;
-
- /*
- * Set chip as a default. Board drivers can override it, if necessary
- */
- chip->options |= NAND_NO_AUTOINCR;
-
- /* Check if chip is a not a samsung device. Do not clear the
- * options for chips which are not having an extended id.
- */
- if (*maf_id != NAND_MFR_SAMSUNG && !type->pagesize)
- chip->options &= ~NAND_SAMSUNG_LP_OPTIONS;
-
- /* Check for AND chips with 4 page planes */
- if (chip->options & NAND_4PAGE_ARRAY)
- chip->erase_cmd = multi_erase_cmd;
- else
- chip->erase_cmd = single_erase_cmd;
-
- /* Do not replace user supplied command function ! */
- if (mtd->writesize > 512 && chip->cmdfunc == nand_command)
- chip->cmdfunc = nand_command_lp;
-
- printk(KERN_INFO "NAND device: Manufacturer ID:"
- " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, dev_id,
- nand_manuf_ids[maf_idx].name, type->name);
-
- return type;
-}
-
-/**
- * nand_scan_ident - [NAND Interface] Scan for the NAND device
- * @mtd: MTD device structure
- * @maxchips: Number of chips to scan for
- *
- * This is the first phase of the normal nand_scan() function. It
- * reads the flash ID and sets up MTD fields accordingly.
- *
- * The mtd->owner field must be set to the module of the caller.
- */
-int nand_scan_ident(struct mtd_info *mtd, int maxchips)
-{
- int i, busw, nand_maf_id;
- struct nand_chip *chip = mtd->priv;
- struct nand_flash_dev *type;
-
- /* Get buswidth to select the correct functions */
- busw = chip->options & NAND_BUSWIDTH_16;
- /* Set the default functions */
- nand_set_defaults(chip, busw);
-
- /* Read the flash type */
- type = nand_get_flash_type(mtd, chip, busw, &nand_maf_id);
-
- if (IS_ERR(type)) {
- printk(KERN_WARNING "No NAND device found!!!\n");
- chip->select_chip(mtd, -1);
- return PTR_ERR(type);
- }
-
- /* Check for a chip array */
- for (i = 1; i < maxchips; i++) {
- chip->select_chip(mtd, i);
- /* Send the command for reading device ID */
- chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
- /* Read manufacturer and device IDs */
- if (nand_maf_id != chip->read_byte(mtd) ||
- type->id != chip->read_byte(mtd))
- break;
- }
- if (i > 1)
- printk(KERN_INFO "%d NAND chips detected\n", i);
-
- /* Store the number of chips and calc total size for mtd */
- chip->numchips = i;
- mtd->size = i * chip->chipsize;
-
- return 0;
-}
-
-
-/**
- * nand_scan_tail - [NAND Interface] Scan for the NAND device
- * @mtd: MTD device structure
- * @maxchips: Number of chips to scan for
- *
- * This is the second phase of the normal nand_scan() function. It
- * fills out all the uninitialized function pointers with the defaults
- * and scans for a bad block table if appropriate.
- */
-int nand_scan_tail(struct mtd_info *mtd)
-{
- int i;
- struct nand_chip *chip = mtd->priv;
-
- if (!(chip->options & NAND_OWN_BUFFERS))
- chip->buffers = kmalloc(sizeof(*chip->buffers), GFP_KERNEL);
- if (!chip->buffers)
- return -ENOMEM;
-
- /* Set the internal oob buffer location, just after the page data */
- chip->oob_poi = chip->buffers->databuf + mtd->writesize;
-
- /*
- * If no default placement scheme is given, select an appropriate one
- */
- if (!chip->ecc.layout) {
- switch (mtd->oobsize) {
- case 8:
- chip->ecc.layout = &nand_oob_8;
- break;
- case 16:
- chip->ecc.layout = &nand_oob_16;
- break;
- case 64:
- chip->ecc.layout = &nand_oob_64;
- break;
- default:
- printk(KERN_WARNING "No oob scheme defined for "
- "oobsize %d\n", mtd->oobsize);
- BUG();
- }
- }
-
- if (!chip->write_page)
- chip->write_page = nand_write_page;
-
- /*
- * check ECC mode, default to software if 3byte/512byte hardware ECC is
- * selected and we have 256 byte pagesize fallback to software ECC
- */
- if (!chip->ecc.read_page_raw)
- chip->ecc.read_page_raw = nand_read_page_raw;
- if (!chip->ecc.write_page_raw)
- chip->ecc.write_page_raw = nand_write_page_raw;
-
- switch (chip->ecc.mode) {
- case NAND_ECC_HW:
- /* Use standard hwecc read page function ? */
- if (!chip->ecc.read_page)
- chip->ecc.read_page = nand_read_page_hwecc;
- if (!chip->ecc.write_page)
- chip->ecc.write_page = nand_write_page_hwecc;
- if (!chip->ecc.read_oob)
- chip->ecc.read_oob = nand_read_oob_std;
- if (!chip->ecc.write_oob)
- chip->ecc.write_oob = nand_write_oob_std;
-
- case NAND_ECC_HW_SYNDROME:
- if ((!chip->ecc.calculate || !chip->ecc.correct ||
- !chip->ecc.hwctl) &&
- (!chip->ecc.read_page ||
- chip->ecc.read_page == nand_read_page_hwecc ||
- !chip->ecc.write_page ||
- chip->ecc.write_page == nand_write_page_hwecc)) {
- printk(KERN_WARNING "No ECC functions supplied, "
- "Hardware ECC not possible\n");
- BUG();
- }
- /* Use standard syndrome read/write page function ? */
- if (!chip->ecc.read_page)
- chip->ecc.read_page = nand_read_page_syndrome;
- if (!chip->ecc.write_page)
- chip->ecc.write_page = nand_write_page_syndrome;
- if (!chip->ecc.read_oob)
- chip->ecc.read_oob = nand_read_oob_syndrome;
- if (!chip->ecc.write_oob)
- chip->ecc.write_oob = nand_write_oob_syndrome;
-
- if (mtd->writesize >= chip->ecc.size)
- break;
- printk(KERN_WARNING "%d byte HW ECC not possible on "
- "%d byte page size, fallback to SW ECC\n",
- chip->ecc.size, mtd->writesize);
- chip->ecc.mode = NAND_ECC_SOFT;
-
- case NAND_ECC_SOFT:
- chip->ecc.calculate = nand_calculate_ecc;
- chip->ecc.correct = nand_correct_data;
- chip->ecc.read_page = nand_read_page_swecc;
- chip->ecc.write_page = nand_write_page_swecc;
- chip->ecc.read_oob = nand_read_oob_std;
- chip->ecc.write_oob = nand_write_oob_std;
- chip->ecc.size = 256;
- chip->ecc.bytes = 3;
- break;
-
- case NAND_ECC_NONE:
- printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. "
- "This is not recommended !!\n");
- chip->ecc.read_page = nand_read_page_raw;
- chip->ecc.write_page = nand_write_page_raw;
- chip->ecc.read_oob = nand_read_oob_std;
- chip->ecc.write_oob = nand_write_oob_std;
- chip->ecc.size = mtd->writesize;
- chip->ecc.bytes = 0;
- break;
-
- default:
- printk(KERN_WARNING "Invalid NAND_ECC_MODE %d\n",
- chip->ecc.mode);
- BUG();
- }
-
- /*
- * The number of bytes available for a client to place data into
- * the out of band area
- */
- chip->ecc.layout->oobavail = 0;
- for (i = 0; chip->ecc.layout->oobfree[i].length; i++)
- chip->ecc.layout->oobavail +=
- chip->ecc.layout->oobfree[i].length;
- mtd->oobavail = chip->ecc.layout->oobavail;
-
- /*
- * Set the number of read / write steps for one page depending on ECC
- * mode
- */
- chip->ecc.steps = mtd->writesize / chip->ecc.size;
- if(chip->ecc.steps * chip->ecc.size != mtd->writesize) {
- printk(KERN_WARNING "Invalid ecc parameters\n");
- BUG();
- }
- chip->ecc.total = chip->ecc.steps * chip->ecc.bytes;
-
- /*
- * Allow subpage writes up to ecc.steps. Not possible for MLC
- * FLASH.
- */
- if (!(chip->options & NAND_NO_SUBPAGE_WRITE) &&
- !(chip->cellinfo & NAND_CI_CELLTYPE_MSK)) {
- switch(chip->ecc.steps) {
- case 2:
- mtd->subpage_sft = 1;
- break;
- case 4:
- case 8:
- mtd->subpage_sft = 2;
- break;
- }
- }
- chip->subpagesize = mtd->writesize >> mtd->subpage_sft;
-
- /* Initialize state */
- chip->state = FL_READY;
-
- /* De-select the device */
- chip->select_chip(mtd, -1);
-
- /* Invalidate the pagebuffer reference */
- chip->pagebuf = -1;
-
- /* Fill in remaining MTD driver data */
- mtd->type = MTD_NANDFLASH;
- mtd->flags = MTD_CAP_NANDFLASH;
- mtd->erase = nand_erase;
- mtd->read = nand_read;
- mtd->write = nand_write;
- mtd->read_oob = nand_read_oob;
- mtd->write_oob = nand_write_oob;
- mtd->sync = nand_sync;
- mtd->lock = NULL;
- mtd->unlock = NULL;
- mtd->suspend = nand_suspend;
- mtd->resume = nand_resume;
- mtd->block_isbad = nand_block_isbad;
- mtd->block_markbad = nand_block_markbad;
-
- /* propagate ecc.layout to mtd_info */
- mtd->ecclayout = chip->ecc.layout;
-
- /* Check, if we should skip the bad block table scan */
- if (chip->options & NAND_SKIP_BBTSCAN)
- return 0;
-
- /* Build bad block table */
- return chip->scan_bbt(mtd);
-}
-
-/**
- * nand_scan - [NAND Interface] Scan for the NAND device
- * @mtd: MTD device structure
- * @maxchips: Number of chips to scan for
- *
- * This fills out all the uninitialized function pointers
- * with the defaults.
- * The flash ID is read and the mtd/chip structures are
- * filled with the appropriate values.
- * The mtd->owner field must be set to the module of the caller
- *
- */
-int nand_scan(struct mtd_info *mtd, int maxchips)
-{
- int ret;
-
- ret = nand_scan_ident(mtd, maxchips);
- if (!ret)
- ret = nand_scan_tail(mtd);
- return ret;
-}
-
-/**
- * nand_release - [NAND Interface] Free resources held by the NAND device
- * @mtd: MTD device structure
-*/
-void nand_release(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd->priv;
-
- /* Deregister the device */
- del_mtd_device(mtd);
-
- /* Free bad block table memory */
- kfree(chip->bbt);
- if (!(chip->options & NAND_OWN_BUFFERS))
- kfree(chip->buffers);
-}
-
-EXPORT_SYMBOL(nand_scan);
-EXPORT_SYMBOL(nand_scan_ident);
-EXPORT_SYMBOL(nand_scan_tail);
-EXPORT_SYMBOL(nand_release);
-
-#endif /* DOXYGEN_SHOULD_SKIP_THIS */
diff --git a/drivers/nand/nand_bbt.c b/drivers/nand/nand_bbt.c
deleted file mode 100644
index 4a6bf39..0000000
--- a/drivers/nand/nand_bbt.c
+++ /dev/null
@@ -1,1224 +0,0 @@
-/*
- * drivers/mtd/nand_bbt.c
- *
- * Overview:
- * Bad block table support for the NAND driver
- *
- * Copyright (C) 2004 Thomas Gleixner (tglx@linutronix.de)
- *
- * $Id: nand_bbt.c,v 1.36 2005/11/07 11:14:30 gleixner Exp $
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Description:
- *
- * When nand_scan_bbt is called, then it tries to find the bad block table
- * depending on the options in the bbt descriptor(s). If a bbt is found
- * then the contents are read and the memory based bbt is created. If a
- * mirrored bbt is selected then the mirror is searched too and the
- * versions are compared. If the mirror has a greater version number
- * than the mirror bbt is used to build the memory based bbt.
- * If the tables are not versioned, then we "or" the bad block information.
- * If one of the bbt's is out of date or does not exist it is (re)created.
- * If no bbt exists at all then the device is scanned for factory marked
- * good / bad blocks and the bad block tables are created.
- *
- * For manufacturer created bbts like the one found on M-SYS DOC devices
- * the bbt is searched and read but never created
- *
- * The autogenerated bad block table is located in the last good blocks
- * of the device. The table is mirrored, so it can be updated eventually.
- * The table is marked in the oob area with an ident pattern and a version
- * number which indicates which of both tables is more up to date.
- *
- * The table uses 2 bits per block
- * 11b: block is good
- * 00b: block is factory marked bad
- * 01b, 10b: block is marked bad due to wear
- *
- * The memory bad block table uses the following scheme:
- * 00b: block is good
- * 01b: block is marked bad due to wear
- * 10b: block is reserved (to protect the bbt area)
- * 11b: block is factory marked bad
- *
- * Multichip devices like DOC store the bad block info per floor.
- *
- * Following assumptions are made:
- * - bbts start at a page boundary, if autolocated on a block boundary
- * - the space necessary for a bbt in FLASH does not exceed a block boundary
- *
- */
-#include <common.h>
-#include <linux/types.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/nand_ecc.h>
-#include <linux/bitops.h>
-#include <clock.h>
-#include <errno.h>
-#include <malloc.h>
-
-#ifndef DOXYGEN_SHOULD_SKIP_THIS
-
-/**
- * check_pattern - [GENERIC] check if a pattern is in the buffer
- * @buf: the buffer to search
- * @len: the length of buffer to search
- * @paglen: the pagelength
- * @td: search pattern descriptor
- *
- * Check for a pattern at the given place. Used to search bad block
- * tables and good / bad block identifiers.
- * If the SCAN_EMPTY option is set then check, if all bytes except the
- * pattern area contain 0xff
- *
-*/
-static int check_pattern(uint8_t *buf, int len, int paglen, struct nand_bbt_descr *td)
-{
- int i, end = 0;
- uint8_t *p = buf;
-
- end = paglen + td->offs;
- if (td->options & NAND_BBT_SCANEMPTY) {
- for (i = 0; i < end; i++) {
- if (p[i] != 0xff)
- return -1;
- }
- }
- p += end;
-
- /* Compare the pattern */
- for (i = 0; i < td->len; i++) {
- if (p[i] != td->pattern[i])
- return -1;
- }
-
- if (td->options & NAND_BBT_SCANEMPTY) {
- p += td->len;
- end += td->len;
- for (i = end; i < len; i++) {
- if (*p++ != 0xff)
- return -1;
- }
- }
- return 0;
-}
-
-/**
- * check_short_pattern - [GENERIC] check if a pattern is in the buffer
- * @buf: the buffer to search
- * @td: search pattern descriptor
- *
- * Check for a pattern at the given place. Used to search bad block
- * tables and good / bad block identifiers. Same as check_pattern, but
- * no optional empty check
- *
-*/
-static int check_short_pattern(uint8_t *buf, struct nand_bbt_descr *td)
-{
- int i;
- uint8_t *p = buf;
-
- /* Compare the pattern */
- for (i = 0; i < td->len; i++) {
- if (p[td->offs + i] != td->pattern[i])
- return -1;
- }
- return 0;
-}
-
-/**
- * read_bbt - [GENERIC] Read the bad block table starting from page
- * @mtd: MTD device structure
- * @buf: temporary buffer
- * @page: the starting page
- * @num: the number of bbt descriptors to read
- * @bits: number of bits per block
- * @offs: offset in the memory table
- * @reserved_block_code: Pattern to identify reserved blocks
- *
- * Read the bad block table starting from page.
- *
- */
-static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
- int bits, int offs, int reserved_block_code)
-{
- int res, i, j, act = 0;
- struct nand_chip *this = mtd->priv;
- size_t retlen, len, totlen;
- loff_t from;
- uint8_t msk = (uint8_t) ((1 << bits) - 1);
-
- totlen = (num * bits) >> 3;
- from = ((loff_t) page) << this->page_shift;
-
- while (totlen) {
- len = min(totlen, (size_t) (1 << this->bbt_erase_shift));
- res = mtd->read(mtd, from, len, &retlen, buf);
- if (res < 0) {
- if (retlen != len) {
- printk(KERN_INFO "nand_bbt: Error reading bad block table\n");
- return res;
- }
- printk(KERN_WARNING "nand_bbt: ECC error while reading bad block table\n");
- }
-
- /* Analyse data */
- for (i = 0; i < len; i++) {
- uint8_t dat = buf[i];
- for (j = 0; j < 8; j += bits, act += 2) {
- uint8_t tmp = (dat >> j) & msk;
- if (tmp == msk)
- continue;
- if (reserved_block_code && (tmp == reserved_block_code)) {
- printk(KERN_DEBUG "nand_read_bbt: Reserved block at 0x%08x\n",
- ((offs << 2) + (act >> 1)) << this->bbt_erase_shift);
- this->bbt[offs + (act >> 3)] |= 0x2 << (act & 0x06);
- mtd->ecc_stats.bbtblocks++;
- continue;
- }
- /* Leave it for now, if its matured we can move this
- * message to MTD_DEBUG_LEVEL0 */
- printk(KERN_DEBUG "nand_read_bbt: Bad block at 0x%08x\n",
- ((offs << 2) + (act >> 1)) << this->bbt_erase_shift);
- /* Factory marked bad or worn out ? */
- if (tmp == 0)
- this->bbt[offs + (act >> 3)] |= 0x3 << (act & 0x06);
- else
- this->bbt[offs + (act >> 3)] |= 0x1 << (act & 0x06);
- mtd->ecc_stats.badblocks++;
- }
- }
- totlen -= len;
- from += len;
- }
- return 0;
-}
-
-/**
- * read_abs_bbt - [GENERIC] Read the bad block table starting at a given page
- * @mtd: MTD device structure
- * @buf: temporary buffer
- * @td: descriptor for the bad block table
- * @chip: read the table for a specific chip, -1 read all chips.
- * Applies only if NAND_BBT_PERCHIP option is set
- *
- * Read the bad block table for all chips starting at a given page
- * We assume that the bbt bits are in consecutive order.
-*/
-static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip)
-{
- struct nand_chip *this = mtd->priv;
- int res = 0, i;
- int bits;
-
- bits = td->options & NAND_BBT_NRBITS_MSK;
- if (td->options & NAND_BBT_PERCHIP) {
- int offs = 0;
- for (i = 0; i < this->numchips; i++) {
- if (chip == -1 || chip == i)
- res = read_bbt (mtd, buf, td->pages[i], this->chipsize >> this->bbt_erase_shift, bits, offs, td->reserved_block_code);
- if (res)
- return res;
- offs += this->chipsize >> (this->bbt_erase_shift + 2);
- }
- } else {
- res = read_bbt (mtd, buf, td->pages[0], mtd->size >> this->bbt_erase_shift, bits, 0, td->reserved_block_code);
- if (res)
- return res;
- }
- return 0;
-}
-
-/*
- * Scan read raw data from flash
- */
-static int scan_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
- size_t len)
-{
- struct mtd_oob_ops ops;
-
- ops.mode = MTD_OOB_RAW;
- ops.ooboffs = 0;
- ops.ooblen = mtd->oobsize;
- ops.oobbuf = buf;
- ops.datbuf = buf;
- ops.len = len;
-
- return mtd->read_oob(mtd, offs, &ops);
-}
-
-/*
- * Scan write data with oob to flash
- */
-static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len,
- uint8_t *buf, uint8_t *oob)
-{
- struct mtd_oob_ops ops;
-
- ops.mode = MTD_OOB_PLACE;
- ops.ooboffs = 0;
- ops.ooblen = mtd->oobsize;
- ops.datbuf = buf;
- ops.oobbuf = oob;
- ops.len = len;
-
- return mtd->write_oob(mtd, offs, &ops);
-}
-
-/**
- * read_abs_bbts - [GENERIC] Read the bad block table(s) for all chips starting at a given page
- * @mtd: MTD device structure
- * @buf: temporary buffer
- * @td: descriptor for the bad block table
- * @md: descriptor for the bad block table mirror
- *
- * Read the bad block table(s) for all chips starting at a given page
- * We assume that the bbt bits are in consecutive order.
- *
-*/
-static int read_abs_bbts(struct mtd_info *mtd, uint8_t *buf,
- struct nand_bbt_descr *td, struct nand_bbt_descr *md)
-{
- struct nand_chip *this = mtd->priv;
-
- /* Read the primary version, if available */
- if (td->options & NAND_BBT_VERSION) {
- scan_read_raw(mtd, buf, td->pages[0] << this->page_shift,
- mtd->writesize);
- td->version[0] = buf[mtd->writesize + td->veroffs];
- printk(KERN_DEBUG "Bad block table at page %d, version 0x%02X\n",
- td->pages[0], td->version[0]);
- }
-
- /* Read the mirror version, if available */
- if (md && (md->options & NAND_BBT_VERSION)) {
- scan_read_raw(mtd, buf, md->pages[0] << this->page_shift,
- mtd->writesize);
- md->version[0] = buf[mtd->writesize + md->veroffs];
- printk(KERN_DEBUG "Bad block table at page %d, version 0x%02X\n",
- md->pages[0], md->version[0]);
- }
- return 1;
-}
-
-/*
- * Scan a given block full
- */
-static int scan_block_full(struct mtd_info *mtd, struct nand_bbt_descr *bd,
- loff_t offs, uint8_t *buf, size_t readlen,
- int scanlen, int len)
-{
- int ret, j;
-
- ret = scan_read_raw(mtd, buf, offs, readlen);
- if (ret)
- return ret;
-
- for (j = 0; j < len; j++, buf += scanlen) {
- if (check_pattern(buf, scanlen, mtd->writesize, bd))
- return 1;
- }
- return 0;
-}
-
-/*
- * Scan a given block partially
- */
-static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd,
- loff_t offs, uint8_t *buf, int len)
-{
- struct mtd_oob_ops ops;
- int j, ret;
-
- ops.ooblen = mtd->oobsize;
- ops.oobbuf = buf;
- ops.ooboffs = 0;
- ops.datbuf = NULL;
- ops.mode = MTD_OOB_PLACE;
-
- for (j = 0; j < len; j++) {
- /*
- * Read the full oob until read_oob is fixed to
- * handle single byte reads for 16 bit
- * buswidth
- */
- ret = mtd->read_oob(mtd, offs, &ops);
- if (ret)
- return ret;
-
- if (check_short_pattern(buf, bd))
- return 1;
-
- offs += mtd->writesize;
- }
- return 0;
-}
-
-/**
- * create_bbt - [GENERIC] Create a bad block table by scanning the device
- * @mtd: MTD device structure
- * @buf: temporary buffer
- * @bd: descriptor for the good/bad block search pattern
- * @chip: create the table for a specific chip, -1 read all chips.
- * Applies only if NAND_BBT_PERCHIP option is set
- *
- * Create a bad block table by scanning the device
- * for the given good/bad block identify pattern
- */
-static int create_bbt(struct mtd_info *mtd, uint8_t *buf,
- struct nand_bbt_descr *bd, int chip)
-{
- struct nand_chip *this = mtd->priv;
- int i, numblocks, len, scanlen;
- int startblock;
- loff_t from;
- size_t readlen;
-
- printk(KERN_INFO "Scanning device for bad blocks\n");
-
- if (bd->options & NAND_BBT_SCANALLPAGES)
- len = 1 << (this->bbt_erase_shift - this->page_shift);
- else {
- if (bd->options & NAND_BBT_SCAN2NDPAGE)
- len = 2;
- else
- len = 1;
- }
-
- if (!(bd->options & NAND_BBT_SCANEMPTY)) {
- /* We need only read few bytes from the OOB area */
- scanlen = 0;
- readlen = bd->len;
- } else {
- /* Full page content should be read */
- scanlen = mtd->writesize + mtd->oobsize;
- readlen = len * mtd->writesize;
- }
-
- if (chip == -1) {
- /* Note that numblocks is 2 * (real numblocks) here, see i+=2
- * below as it makes shifting and masking less painful */
- numblocks = mtd->size >> (this->bbt_erase_shift - 1);
- startblock = 0;
- from = 0;
- } else {
- if (chip >= this->numchips) {
- printk(KERN_WARNING "create_bbt(): chipnr (%d) > available chips (%d)\n",
- chip + 1, this->numchips);
- return -EINVAL;
- }
- numblocks = this->chipsize >> (this->bbt_erase_shift - 1);
- startblock = chip * numblocks;
- numblocks += startblock;
- from = startblock << (this->bbt_erase_shift - 1);
- }
-
- for (i = startblock; i < numblocks;) {
- int ret;
-
- if (bd->options & NAND_BBT_SCANALLPAGES)
- ret = scan_block_full(mtd, bd, from, buf, readlen,
- scanlen, len);
- else
- ret = scan_block_fast(mtd, bd, from, buf, len);
-
- if (ret < 0)
- return ret;
-
- if (ret) {
- this->bbt[i >> 3] |= 0x03 << (i & 0x6);
- printk(KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
- i >> 1, (unsigned int)from);
- mtd->ecc_stats.badblocks++;
- }
-
- i += 2;
- from += (1 << this->bbt_erase_shift);
- }
- return 0;
-}
-
-/**
- * search_bbt - [GENERIC] scan the device for a specific bad block table
- * @mtd: MTD device structure
- * @buf: temporary buffer
- * @td: descriptor for the bad block table
- *
- * Read the bad block table by searching for a given ident pattern.
- * Search is preformed either from the beginning up or from the end of
- * the device downwards. The search starts always at the start of a
- * block.
- * If the option NAND_BBT_PERCHIP is given, each chip is searched
- * for a bbt, which contains the bad block information of this chip.
- * This is necessary to provide support for certain DOC devices.
- *
- * The bbt ident pattern resides in the oob area of the first page
- * in a block.
- */
-static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td)
-{
- struct nand_chip *this = mtd->priv;
- int i, chips;
- int bits, startblock, block, dir;
- int scanlen = mtd->writesize + mtd->oobsize;
- int bbtblocks;
- int blocktopage = this->bbt_erase_shift - this->page_shift;
-
- /* Search direction top -> down ? */
- if (td->options & NAND_BBT_LASTBLOCK) {
- startblock = (mtd->size >> this->bbt_erase_shift) - 1;
- dir = -1;
- } else {
- startblock = 0;
- dir = 1;
- }
-
- /* Do we have a bbt per chip ? */
- if (td->options & NAND_BBT_PERCHIP) {
- chips = this->numchips;
- bbtblocks = this->chipsize >> this->bbt_erase_shift;
- startblock &= bbtblocks - 1;
- } else {
- chips = 1;
- bbtblocks = mtd->size >> this->bbt_erase_shift;
- }
-
- /* Number of bits for each erase block in the bbt */
- bits = td->options & NAND_BBT_NRBITS_MSK;
-
- for (i = 0; i < chips; i++) {
- /* Reset version information */
- td->version[i] = 0;
- td->pages[i] = -1;
- /* Scan the maximum number of blocks */
- for (block = 0; block < td->maxblocks; block++) {
-
- int actblock = startblock + dir * block;
- loff_t offs = actblock << this->bbt_erase_shift;
-
- /* Read first page */
- scan_read_raw(mtd, buf, offs, mtd->writesize);
- if (!check_pattern(buf, scanlen, mtd->writesize, td)) {
- td->pages[i] = actblock << blocktopage;
- if (td->options & NAND_BBT_VERSION) {
- td->version[i] = buf[mtd->writesize + td->veroffs];
- }
- break;
- }
- }
- startblock += this->chipsize >> this->bbt_erase_shift;
- }
- /* Check, if we found a bbt for each requested chip */
- for (i = 0; i < chips; i++) {
- if (td->pages[i] == -1)
- printk(KERN_WARNING "Bad block table not found for chip %d\n", i);
- else
- printk(KERN_DEBUG "Bad block table found at page %d, version 0x%02X\n", td->pages[i],
- td->version[i]);
- }
- return 0;
-}
-
-/**
- * search_read_bbts - [GENERIC] scan the device for bad block table(s)
- * @mtd: MTD device structure
- * @buf: temporary buffer
- * @td: descriptor for the bad block table
- * @md: descriptor for the bad block table mirror
- *
- * Search and read the bad block table(s)
-*/
-static int search_read_bbts(struct mtd_info *mtd, uint8_t * buf, struct nand_bbt_descr *td, struct nand_bbt_descr *md)
-{
- /* Search the primary table */
- search_bbt(mtd, buf, td);
-
- /* Search the mirror table */
- if (md)
- search_bbt(mtd, buf, md);
-
- /* Force result check */
- return 1;
-}
-
-/**
- * write_bbt - [GENERIC] (Re)write the bad block table
- *
- * @mtd: MTD device structure
- * @buf: temporary buffer
- * @td: descriptor for the bad block table
- * @md: descriptor for the bad block table mirror
- * @chipsel: selector for a specific chip, -1 for all
- *
- * (Re)write the bad block table
- *
-*/
-static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
- struct nand_bbt_descr *td, struct nand_bbt_descr *md,
- int chipsel)
-{
- struct nand_chip *this = mtd->priv;
- struct erase_info einfo;
- int i, j, res, chip = 0;
- int bits, startblock, dir, page, offs, numblocks, sft, sftmsk;
- int nrchips, bbtoffs, pageoffs, ooboffs;
- uint8_t msk[4];
- uint8_t rcode = td->reserved_block_code;
- size_t retlen, len = 0;
- loff_t to;
- struct mtd_oob_ops ops;
-
- ops.ooblen = mtd->oobsize;
- ops.ooboffs = 0;
- ops.datbuf = NULL;
- ops.mode = MTD_OOB_PLACE;
-
- if (!rcode)
- rcode = 0xff;
- /* Write bad block table per chip rather than per device ? */
- if (td->options & NAND_BBT_PERCHIP) {
- numblocks = (int)(this->chipsize >> this->bbt_erase_shift);
- /* Full device write or specific chip ? */
- if (chipsel == -1) {
- nrchips = this->numchips;
- } else {
- nrchips = chipsel + 1;
- chip = chipsel;
- }
- } else {
- numblocks = (int)(mtd->size >> this->bbt_erase_shift);
- nrchips = 1;
- }
-
- /* Loop through the chips */
- for (; chip < nrchips; chip++) {
-
- /* There was already a version of the table, reuse the page
- * This applies for absolute placement too, as we have the
- * page nr. in td->pages.
- */
- if (td->pages[chip] != -1) {
- page = td->pages[chip];
- goto write;
- }
-
- /* Automatic placement of the bad block table */
- /* Search direction top -> down ? */
- if (td->options & NAND_BBT_LASTBLOCK) {
- startblock = numblocks * (chip + 1) - 1;
- dir = -1;
- } else {
- startblock = chip * numblocks;
- dir = 1;
- }
-
- for (i = 0; i < td->maxblocks; i++) {
- int block = startblock + dir * i;
- /* Check, if the block is bad */
- switch ((this->bbt[block >> 2] >>
- (2 * (block & 0x03))) & 0x03) {
- case 0x01:
- case 0x03:
- continue;
- }
- page = block <<
- (this->bbt_erase_shift - this->page_shift);
- /* Check, if the block is used by the mirror table */
- if (!md || md->pages[chip] != page)
- goto write;
- }
- printk(KERN_ERR "No space left to write bad block table\n");
- return -ENOSPC;
- write:
-
- /* Set up shift count and masks for the flash table */
- bits = td->options & NAND_BBT_NRBITS_MSK;
- msk[2] = ~rcode;
- switch (bits) {
- case 1: sft = 3; sftmsk = 0x07; msk[0] = 0x00; msk[1] = 0x01;
- msk[3] = 0x01;
- break;
- case 2: sft = 2; sftmsk = 0x06; msk[0] = 0x00; msk[1] = 0x01;
- msk[3] = 0x03;
- break;
- case 4: sft = 1; sftmsk = 0x04; msk[0] = 0x00; msk[1] = 0x0C;
- msk[3] = 0x0f;
- break;
- case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F;
- msk[3] = 0xff;
- break;
- default: return -EINVAL;
- }
-
- bbtoffs = chip * (numblocks >> 2);
-
- to = ((loff_t) page) << this->page_shift;
-
- /* Must we save the block contents ? */
- if (td->options & NAND_BBT_SAVECONTENT) {
- /* Make it block aligned */
- to &= ~((loff_t) ((1 << this->bbt_erase_shift) - 1));
- len = 1 << this->bbt_erase_shift;
- res = mtd->read(mtd, to, len, &retlen, buf);
- if (res < 0) {
- if (retlen != len) {
- printk(KERN_INFO "nand_bbt: Error "
- "reading block for writing "
- "the bad block table\n");
- return res;
- }
- printk(KERN_WARNING "nand_bbt: ECC error "
- "while reading block for writing "
- "bad block table\n");
- }
- /* Read oob data */
- ops.ooblen = (len >> this->page_shift) * mtd->oobsize;
- ops.oobbuf = &buf[len];
- res = mtd->read_oob(mtd, to + mtd->writesize, &ops);
- if (res < 0 || ops.oobretlen != ops.ooblen)
- goto outerr;
-
- /* Calc the byte offset in the buffer */
- pageoffs = page - (int)(to >> this->page_shift);
- offs = pageoffs << this->page_shift;
- /* Preset the bbt area with 0xff */
- memset(&buf[offs], 0xff, (size_t) (numblocks >> sft));
- ooboffs = len + (pageoffs * mtd->oobsize);
-
- } else {
- /* Calc length */
- len = (size_t) (numblocks >> sft);
- /* Make it page aligned ! */
- len = (len + (mtd->writesize - 1)) &
- ~(mtd->writesize - 1);
- /* Preset the buffer with 0xff */
- memset(buf, 0xff, len +
- (len >> this->page_shift)* mtd->oobsize);
- offs = 0;
- ooboffs = len;
- /* Pattern is located in oob area of first page */
- memcpy(&buf[ooboffs + td->offs], td->pattern, td->len);
- }
-
- if (td->options & NAND_BBT_VERSION)
- buf[ooboffs + td->veroffs] = td->version[chip];
-
- /* walk through the memory table */
- for (i = 0; i < numblocks;) {
- uint8_t dat;
- dat = this->bbt[bbtoffs + (i >> 2)];
- for (j = 0; j < 4; j++, i++) {
- int sftcnt = (i << (3 - sft)) & sftmsk;
- /* Do not store the reserved bbt blocks ! */
- buf[offs + (i >> sft)] &=
- ~(msk[dat & 0x03] << sftcnt);
- dat >>= 2;
- }
- }
-
- memset(&einfo, 0, sizeof(einfo));
- einfo.mtd = mtd;
- einfo.addr = (unsigned long)to;
- einfo.len = 1 << this->bbt_erase_shift;
- res = nand_erase_nand(mtd, &einfo, 1);
- if (res < 0)
- goto outerr;
-
- res = scan_write_bbt(mtd, to, len, buf, &buf[len]);
- if (res < 0)
- goto outerr;
-
- printk(KERN_DEBUG "Bad block table written to 0x%08x, version "
- "0x%02X\n", (unsigned int)to, td->version[chip]);
-
- /* Mark it as used */
- td->pages[chip] = page;
- }
- return 0;
-
- outerr:
- printk(KERN_WARNING
- "nand_bbt: Error while writing bad block table %d\n", res);
- return res;
-}
-
-/**
- * nand_memory_bbt - [GENERIC] create a memory based bad block table
- * @mtd: MTD device structure
- * @bd: descriptor for the good/bad block search pattern
- *
- * The function creates a memory based bbt by scanning the device
- * for manufacturer / software marked good / bad blocks
-*/
-static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
-{
- struct nand_chip *this = mtd->priv;
-
- bd->options &= ~NAND_BBT_SCANEMPTY;
- return create_bbt(mtd, this->buffers->databuf, bd, -1);
-}
-
-/**
- * check_create - [GENERIC] create and write bbt(s) if necessary
- * @mtd: MTD device structure
- * @buf: temporary buffer
- * @bd: descriptor for the good/bad block search pattern
- *
- * The function checks the results of the previous call to read_bbt
- * and creates / updates the bbt(s) if necessary
- * Creation is necessary if no bbt was found for the chip/device
- * Update is necessary if one of the tables is missing or the
- * version nr. of one table is less than the other
-*/
-static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd)
-{
- int i, chips, writeops, chipsel, res;
- struct nand_chip *this = mtd->priv;
- struct nand_bbt_descr *td = this->bbt_td;
- struct nand_bbt_descr *md = this->bbt_md;
- struct nand_bbt_descr *rd, *rd2;
-
- /* Do we have a bbt per chip ? */
- if (td->options & NAND_BBT_PERCHIP)
- chips = this->numchips;
- else
- chips = 1;
-
- for (i = 0; i < chips; i++) {
- writeops = 0;
- rd = NULL;
- rd2 = NULL;
- /* Per chip or per device ? */
- chipsel = (td->options & NAND_BBT_PERCHIP) ? i : -1;
- /* Mirrored table avilable ? */
- if (md) {
- if (td->pages[i] == -1 && md->pages[i] == -1) {
- writeops = 0x03;
- goto create;
- }
-
- if (td->pages[i] == -1) {
- rd = md;
- td->version[i] = md->version[i];
- writeops = 1;
- goto writecheck;
- }
-
- if (md->pages[i] == -1) {
- rd = td;
- md->version[i] = td->version[i];
- writeops = 2;
- goto writecheck;
- }
-
- if (td->version[i] == md->version[i]) {
- rd = td;
- if (!(td->options & NAND_BBT_VERSION))
- rd2 = md;
- goto writecheck;
- }
-
- if (((int8_t) (td->version[i] - md->version[i])) > 0) {
- rd = td;
- md->version[i] = td->version[i];
- writeops = 2;
- } else {
- rd = md;
- td->version[i] = md->version[i];
- writeops = 1;
- }
-
- goto writecheck;
-
- } else {
- if (td->pages[i] == -1) {
- writeops = 0x01;
- goto create;
- }
- rd = td;
- goto writecheck;
- }
- create:
- /* Create the bad block table by scanning the device ? */
- if (!(td->options & NAND_BBT_CREATE))
- continue;
-
- /* Create the table in memory by scanning the chip(s) */
- create_bbt(mtd, buf, bd, chipsel);
-
- td->version[i] = 1;
- if (md)
- md->version[i] = 1;
- writecheck:
- /* read back first ? */
- if (rd)
- read_abs_bbt(mtd, buf, rd, chipsel);
- /* If they weren't versioned, read both. */
- if (rd2)
- read_abs_bbt(mtd, buf, rd2, chipsel);
-
- /* Write the bad block table to the device ? */
- if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) {
- res = write_bbt(mtd, buf, td, md, chipsel);
- if (res < 0)
- return res;
- }
-
- /* Write the mirror bad block table to the device ? */
- if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) {
- res = write_bbt(mtd, buf, md, td, chipsel);
- if (res < 0)
- return res;
- }
- }
- return 0;
-}
-
-/**
- * mark_bbt_regions - [GENERIC] mark the bad block table regions
- * @mtd: MTD device structure
- * @td: bad block table descriptor
- *
- * The bad block table regions are marked as "bad" to prevent
- * accidental erasures / writes. The regions are identified by
- * the mark 0x02.
-*/
-static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)
-{
- struct nand_chip *this = mtd->priv;
- int i, j, chips, block, nrblocks, update;
- uint8_t oldval, newval;
-
- /* Do we have a bbt per chip ? */
- if (td->options & NAND_BBT_PERCHIP) {
- chips = this->numchips;
- nrblocks = (int)(this->chipsize >> this->bbt_erase_shift);
- } else {
- chips = 1;
- nrblocks = (int)(mtd->size >> this->bbt_erase_shift);
- }
-
- for (i = 0; i < chips; i++) {
- if ((td->options & NAND_BBT_ABSPAGE) ||
- !(td->options & NAND_BBT_WRITE)) {
- if (td->pages[i] == -1)
- continue;
- block = td->pages[i] >> (this->bbt_erase_shift - this->page_shift);
- block <<= 1;
- oldval = this->bbt[(block >> 3)];
- newval = oldval | (0x2 << (block & 0x06));
- this->bbt[(block >> 3)] = newval;
- if ((oldval != newval) && td->reserved_block_code)
- nand_update_bbt(mtd, block << (this->bbt_erase_shift - 1));
- continue;
- }
- update = 0;
- if (td->options & NAND_BBT_LASTBLOCK)
- block = ((i + 1) * nrblocks) - td->maxblocks;
- else
- block = i * nrblocks;
- block <<= 1;
- for (j = 0; j < td->maxblocks; j++) {
- oldval = this->bbt[(block >> 3)];
- newval = oldval | (0x2 << (block & 0x06));
- this->bbt[(block >> 3)] = newval;
- if (oldval != newval)
- update = 1;
- block += 2;
- }
- /* If we want reserved blocks to be recorded to flash, and some
- new ones have been marked, then we need to update the stored
- bbts. This should only happen once. */
- if (update && td->reserved_block_code)
- nand_update_bbt(mtd, (block - 2) << (this->bbt_erase_shift - 1));
- }
-}
-
-/**
- * nand_scan_bbt - [NAND Interface] scan, find, read and maybe create bad block table(s)
- * @mtd: MTD device structure
- * @bd: descriptor for the good/bad block search pattern
- *
- * The function checks, if a bad block table(s) is/are already
- * available. If not it scans the device for manufacturer
- * marked good / bad blocks and writes the bad block table(s) to
- * the selected place.
- *
- * The bad block table memory is allocated here. It must be freed
- * by calling the nand_free_bbt function.
- *
-*/
-int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
-{
- struct nand_chip *this = mtd->priv;
- int len, res = 0;
- uint8_t *buf;
- struct nand_bbt_descr *td = this->bbt_td;
- struct nand_bbt_descr *md = this->bbt_md;
-
- len = mtd->size >> (this->bbt_erase_shift + 2);
- /* Allocate memory (2bit per block) and clear the memory bad block table */
- this->bbt = kzalloc(len, GFP_KERNEL);
- if (!this->bbt) {
- printk(KERN_ERR "nand_scan_bbt: Out of memory\n");
- return -ENOMEM;
- }
-
- /* If no primary table decriptor is given, scan the device
- * to build a memory based bad block table
- */
- if (!td) {
- if ((res = nand_memory_bbt(mtd, bd))) {
- printk(KERN_ERR "nand_bbt: Can't scan flash and build the RAM-based BBT\n");
- kfree(this->bbt);
- this->bbt = NULL;
- }
- return res;
- }
-
- /* Allocate a temporary buffer for one eraseblock incl. oob */
- len = (1 << this->bbt_erase_shift);
- len += (len >> this->page_shift) * mtd->oobsize;
- buf = vmalloc(len);
- if (!buf) {
- printk(KERN_ERR "nand_bbt: Out of memory\n");
- kfree(this->bbt);
- this->bbt = NULL;
- return -ENOMEM;
- }
-
- /* Is the bbt at a given page ? */
- if (td->options & NAND_BBT_ABSPAGE) {
- res = read_abs_bbts(mtd, buf, td, md);
- } else {
- /* Search the bad block table using a pattern in oob */
- res = search_read_bbts(mtd, buf, td, md);
- }
-
- if (res)
- res = check_create(mtd, buf, bd);
-
- /* Prevent the bbt regions from erasing / writing */
- mark_bbt_region(mtd, td);
- if (md)
- mark_bbt_region(mtd, md);
-
- vfree(buf);
- return res;
-}
-
-/**
- * nand_update_bbt - [NAND Interface] update bad block table(s)
- * @mtd: MTD device structure
- * @offs: the offset of the newly marked block
- *
- * The function updates the bad block table(s)
-*/
-int nand_update_bbt(struct mtd_info *mtd, loff_t offs)
-{
- struct nand_chip *this = mtd->priv;
- int len, res = 0, writeops = 0;
- int chip, chipsel;
- uint8_t *buf;
- struct nand_bbt_descr *td = this->bbt_td;
- struct nand_bbt_descr *md = this->bbt_md;
-
- if (!this->bbt || !td)
- return -EINVAL;
-
- len = mtd->size >> (this->bbt_erase_shift + 2);
- /* Allocate a temporary buffer for one eraseblock incl. oob */
- len = (1 << this->bbt_erase_shift);
- len += (len >> this->page_shift) * mtd->oobsize;
- buf = kmalloc(len, GFP_KERNEL);
- if (!buf) {
- printk(KERN_ERR "nand_update_bbt: Out of memory\n");
- return -ENOMEM;
- }
-
- writeops = md != NULL ? 0x03 : 0x01;
-
- /* Do we have a bbt per chip ? */
- if (td->options & NAND_BBT_PERCHIP) {
- chip = (int)(offs >> this->chip_shift);
- chipsel = chip;
- } else {
- chip = 0;
- chipsel = -1;
- }
-
- td->version[chip]++;
- if (md)
- md->version[chip]++;
-
- /* Write the bad block table to the device ? */
- if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) {
- res = write_bbt(mtd, buf, td, md, chipsel);
- if (res < 0)
- goto out;
- }
- /* Write the mirror bad block table to the device ? */
- if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) {
- res = write_bbt(mtd, buf, md, td, chipsel);
- }
-
- out:
- kfree(buf);
- return res;
-}
-
-/* Define some generic bad / good block scan pattern which are used
- * while scanning a device for factory marked good / bad blocks. */
-static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
-
-static struct nand_bbt_descr smallpage_memorybased = {
- .options = NAND_BBT_SCAN2NDPAGE,
- .offs = 5,
- .len = 1,
- .pattern = scan_ff_pattern
-};
-
-static struct nand_bbt_descr largepage_memorybased = {
- .options = 0,
- .offs = 0,
- .len = 2,
- .pattern = scan_ff_pattern
-};
-
-static struct nand_bbt_descr smallpage_flashbased = {
- .options = NAND_BBT_SCAN2NDPAGE,
- .offs = 5,
- .len = 1,
- .pattern = scan_ff_pattern
-};
-
-static struct nand_bbt_descr largepage_flashbased = {
- .options = NAND_BBT_SCAN2NDPAGE,
- .offs = 0,
- .len = 2,
- .pattern = scan_ff_pattern
-};
-
-static uint8_t scan_agand_pattern[] = { 0x1C, 0x71, 0xC7, 0x1C, 0x71, 0xC7 };
-
-static struct nand_bbt_descr agand_flashbased = {
- .options = NAND_BBT_SCANEMPTY | NAND_BBT_SCANALLPAGES,
- .offs = 0x20,
- .len = 6,
- .pattern = scan_agand_pattern
-};
-
-/* Generic flash bbt decriptors
-*/
-static uint8_t bbt_pattern[] = {'B', 'b', 't', '0' };
-static uint8_t mirror_pattern[] = {'1', 't', 'b', 'B' };
-
-static struct nand_bbt_descr bbt_main_descr = {
- .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
- | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
- .offs = 8,
- .len = 4,
- .veroffs = 12,
- .maxblocks = 4,
- .pattern = bbt_pattern
-};
-
-static struct nand_bbt_descr bbt_mirror_descr = {
- .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
- | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
- .offs = 8,
- .len = 4,
- .veroffs = 12,
- .maxblocks = 4,
- .pattern = mirror_pattern
-};
-
-/**
- * nand_default_bbt - [NAND Interface] Select a default bad block table for the device
- * @mtd: MTD device structure
- *
- * This function selects the default bad block table
- * support for the device and calls the nand_scan_bbt function
- *
-*/
-int nand_default_bbt(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
-
- /* Default for AG-AND. We must use a flash based
- * bad block table as the devices have factory marked
- * _good_ blocks. Erasing those blocks leads to loss
- * of the good / bad information, so we _must_ store
- * this information in a good / bad table during
- * startup
- */
- if (this->options & NAND_IS_AND) {
- /* Use the default pattern descriptors */
- if (!this->bbt_td) {
- this->bbt_td = &bbt_main_descr;
- this->bbt_md = &bbt_mirror_descr;
- }
- this->options |= NAND_USE_FLASH_BBT;
- return nand_scan_bbt(mtd, &agand_flashbased);
- }
-
- /* Is a flash based bad block table requested ? */
- if (this->options & NAND_USE_FLASH_BBT) {
- /* Use the default pattern descriptors */
- if (!this->bbt_td) {
- this->bbt_td = &bbt_main_descr;
- this->bbt_md = &bbt_mirror_descr;
- }
- if (!this->badblock_pattern) {
- this->badblock_pattern = (mtd->writesize > 512) ? &largepage_flashbased : &smallpage_flashbased;
- }
- } else {
- this->bbt_td = NULL;
- this->bbt_md = NULL;
- if (!this->badblock_pattern) {
- this->badblock_pattern = (mtd->writesize > 512) ?
- &largepage_memorybased : &smallpage_memorybased;
- }
- }
- return nand_scan_bbt(mtd, this->badblock_pattern);
-}
-
-/**
- * nand_isbad_bbt - [NAND Interface] Check if a block is bad
- * @mtd: MTD device structure
- * @offs: offset in the device
- * @allowbbt: allow access to bad block table region
- *
-*/
-int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
-{
- struct nand_chip *this = mtd->priv;
- int block;
- uint8_t res;
-
- /* Get block number * 2 */
- block = (int)(offs >> (this->bbt_erase_shift - 1));
- res = (this->bbt[block >> 3] >> (block & 0x06)) & 0x03;
-
- MTD_DEBUG(MTD_DEBUG_LEVEL2, "nand_isbad_bbt(): bbt info for offs 0x%08x: (block %d) 0x%02x\n",
- (unsigned int)offs, block >> 1, res);
-
- switch ((int)res) {
- case 0x00:
- return 0;
- case 0x01:
- return 1;
- case 0x02:
- return allowbbt ? 0 : 1;
- }
- return 1;
-}
-
-EXPORT_SYMBOL(nand_scan_bbt);
-EXPORT_SYMBOL(nand_default_bbt);
-
-#endif /* DOXYGEN_SHOULD_SKIP_THIS */
diff --git a/drivers/nand/nand_ecc.c b/drivers/nand/nand_ecc.c
deleted file mode 100644
index 266d573..0000000
--- a/drivers/nand/nand_ecc.c
+++ /dev/null
@@ -1,198 +0,0 @@
-/*
- * This file contains an ECC algorithm from Toshiba that detects and
- * corrects 1 bit errors in a 256 byte block of data.
- *
- * drivers/mtd/nand/nand_ecc.c
- *
- * Copyright (C) 2000-2004 Steven J. Hill (sjhill@realitydiluted.com)
- * Toshiba America Electronics Components, Inc.
- *
- * Copyright (C) 2006 Thomas Gleixner <tglx@linutronix.de>
- *
- * $Id: nand_ecc.c,v 1.15 2005/11/07 11:14:30 gleixner Exp $
- *
- * This file is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 or (at your option) any
- * later version.
- *
- * This file is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this file; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- *
- * As a special exception, if other files instantiate templates or use
- * macros or inline functions from these files, or you compile these
- * files and link them with other works to produce a work based on these
- * files, these files do not by themselves cause the resulting work to be
- * covered by the GNU General Public License. However the source code for
- * these files must still be made available in accordance with section (3)
- * of the GNU General Public License.
- *
- * This exception does not invalidate any other reasons why a work based on
- * this file might be covered by the GNU General Public License.
- */
-
-#include <linux/types.h>
-#include <common.h>
-#include <errno.h>
-#include <linux/mtd/nand_ecc.h>
-
-/*
- * Pre-calculated 256-way 1 byte column parity
- */
-static const u_char nand_ecc_precalc_table[] = {
- 0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a, 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00,
- 0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f, 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
- 0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c, 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
- 0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59, 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
- 0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33, 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
- 0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56, 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
- 0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55, 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
- 0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30, 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
- 0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30, 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
- 0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55, 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
- 0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56, 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
- 0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33, 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
- 0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59, 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
- 0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c, 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
- 0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f, 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
- 0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a, 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00
-};
-
-/**
- * nand_calculate_ecc - [NAND Interface] Calculate 3-byte ECC for 256-byte block
- * @mtd: MTD block structure
- * @dat: raw data
- * @ecc_code: buffer for ECC
- */
-int nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
- u_char *ecc_code)
-{
- uint8_t idx, reg1, reg2, reg3, tmp1, tmp2;
- int i;
-
- /* Initialize variables */
- reg1 = reg2 = reg3 = 0;
-
- /* Build up column parity */
- for(i = 0; i < 256; i++) {
- /* Get CP0 - CP5 from table */
- idx = nand_ecc_precalc_table[*dat++];
- reg1 ^= (idx & 0x3f);
-
- /* All bit XOR = 1 ? */
- if (idx & 0x40) {
- reg3 ^= (uint8_t) i;
- reg2 ^= ~((uint8_t) i);
- }
- }
-
- /* Create non-inverted ECC code from line parity */
- tmp1 = (reg3 & 0x80) >> 0; /* B7 -> B7 */
- tmp1 |= (reg2 & 0x80) >> 1; /* B7 -> B6 */
- tmp1 |= (reg3 & 0x40) >> 1; /* B6 -> B5 */
- tmp1 |= (reg2 & 0x40) >> 2; /* B6 -> B4 */
- tmp1 |= (reg3 & 0x20) >> 2; /* B5 -> B3 */
- tmp1 |= (reg2 & 0x20) >> 3; /* B5 -> B2 */
- tmp1 |= (reg3 & 0x10) >> 3; /* B4 -> B1 */
- tmp1 |= (reg2 & 0x10) >> 4; /* B4 -> B0 */
-
- tmp2 = (reg3 & 0x08) << 4; /* B3 -> B7 */
- tmp2 |= (reg2 & 0x08) << 3; /* B3 -> B6 */
- tmp2 |= (reg3 & 0x04) << 3; /* B2 -> B5 */
- tmp2 |= (reg2 & 0x04) << 2; /* B2 -> B4 */
- tmp2 |= (reg3 & 0x02) << 2; /* B1 -> B3 */
- tmp2 |= (reg2 & 0x02) << 1; /* B1 -> B2 */
- tmp2 |= (reg3 & 0x01) << 1; /* B0 -> B1 */
- tmp2 |= (reg2 & 0x01) << 0; /* B7 -> B0 */
-
- /* Calculate final ECC code */
-#ifdef CONFIG_MTD_NAND_ECC_SMC
- ecc_code[0] = ~tmp2;
- ecc_code[1] = ~tmp1;
-#else
- ecc_code[0] = ~tmp1;
- ecc_code[1] = ~tmp2;
-#endif
- ecc_code[2] = ((~reg1) << 2) | 0x03;
-
- return 0;
-}
-EXPORT_SYMBOL(nand_calculate_ecc);
-
-static inline int countbits(uint32_t byte)
-{
- int res = 0;
-
- for (;byte; byte >>= 1)
- res += byte & 0x01;
- return res;
-}
-
-/**
- * nand_correct_data - [NAND Interface] Detect and correct bit error(s)
- * @mtd: MTD block structure
- * @dat: raw data read from the chip
- * @read_ecc: ECC from the chip
- * @calc_ecc: the ECC calculated from raw data
- *
- * Detect and correct a 1 bit error for 256 byte block
- */
-int nand_correct_data(struct mtd_info *mtd, u_char *dat,
- u_char *read_ecc, u_char *calc_ecc)
-{
- uint8_t s0, s1, s2;
-
-#ifdef CONFIG_MTD_NAND_ECC_SMC
- s0 = calc_ecc[0] ^ read_ecc[0];
- s1 = calc_ecc[1] ^ read_ecc[1];
- s2 = calc_ecc[2] ^ read_ecc[2];
-#else
- s1 = calc_ecc[0] ^ read_ecc[0];
- s0 = calc_ecc[1] ^ read_ecc[1];
- s2 = calc_ecc[2] ^ read_ecc[2];
-#endif
- if ((s0 | s1 | s2) == 0)
- return 0;
-
- /* Check for a single bit error */
- if( ((s0 ^ (s0 >> 1)) & 0x55) == 0x55 &&
- ((s1 ^ (s1 >> 1)) & 0x55) == 0x55 &&
- ((s2 ^ (s2 >> 1)) & 0x54) == 0x54) {
-
- uint32_t byteoffs, bitnum;
-
- byteoffs = (s1 << 0) & 0x80;
- byteoffs |= (s1 << 1) & 0x40;
- byteoffs |= (s1 << 2) & 0x20;
- byteoffs |= (s1 << 3) & 0x10;
-
- byteoffs |= (s0 >> 4) & 0x08;
- byteoffs |= (s0 >> 3) & 0x04;
- byteoffs |= (s0 >> 2) & 0x02;
- byteoffs |= (s0 >> 1) & 0x01;
-
- bitnum = (s2 >> 5) & 0x04;
- bitnum |= (s2 >> 4) & 0x02;
- bitnum |= (s2 >> 3) & 0x01;
-
- dat[byteoffs] ^= (1 << bitnum);
-
- return 1;
- }
-
- if(countbits(s0 | ((uint32_t)s1 << 8) | ((uint32_t)s2 <<16)) == 1)
- return 1;
-
- return -EBADMSG;
-}
-EXPORT_SYMBOL(nand_correct_data);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Steven J. Hill <sjhill@realitydiluted.com>");
-MODULE_DESCRIPTION("Generic NAND ECC support");
diff --git a/drivers/nand/nand_ids.c b/drivers/nand/nand_ids.c
deleted file mode 100644
index f95975c..0000000
--- a/drivers/nand/nand_ids.c
+++ /dev/null
@@ -1,153 +0,0 @@
-/*
- * drivers/mtd/nandids.c
- *
- * Copyright (C) 2002 Thomas Gleixner (tglx@linutronix.de)
- *
- * $Id: nand_ids.c,v 1.16 2005/11/07 11:14:31 gleixner Exp $
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-#include <common.h>
-#include <linux/mtd/nand.h>
-/*
-* Chip ID list
-*
-* Name. ID code, pagesize, chipsize in MegaByte, eraseblock size,
-* options
-*
-* Pagesize; 0, 256, 512
-* 0 get this information from the extended chip ID
-+ 256 256 Byte page size
-* 512 512 Byte page size
-*/
-struct nand_flash_dev nand_flash_ids[] = {
-
-#ifdef CONFIG_MTD_NAND_MUSEUM_IDS
- {"NAND 1MiB 5V 8-bit", 0x6e, 256, 1, 0x1000, 0},
- {"NAND 2MiB 5V 8-bit", 0x64, 256, 2, 0x1000, 0},
- {"NAND 4MiB 5V 8-bit", 0x6b, 512, 4, 0x2000, 0},
- {"NAND 1MiB 3,3V 8-bit", 0xe8, 256, 1, 0x1000, 0},
- {"NAND 1MiB 3,3V 8-bit", 0xec, 256, 1, 0x1000, 0},
- {"NAND 2MiB 3,3V 8-bit", 0xea, 256, 2, 0x1000, 0},
- {"NAND 4MiB 3,3V 8-bit", 0xd5, 512, 4, 0x2000, 0},
- {"NAND 4MiB 3,3V 8-bit", 0xe3, 512, 4, 0x2000, 0},
- {"NAND 4MiB 3,3V 8-bit", 0xe5, 512, 4, 0x2000, 0},
- {"NAND 8MiB 3,3V 8-bit", 0xd6, 512, 8, 0x2000, 0},
-
- {"NAND 8MiB 1,8V 8-bit", 0x39, 512, 8, 0x2000, 0},
- {"NAND 8MiB 3,3V 8-bit", 0xe6, 512, 8, 0x2000, 0},
- {"NAND 8MiB 1,8V 16-bit", 0x49, 512, 8, 0x2000, NAND_BUSWIDTH_16},
- {"NAND 8MiB 3,3V 16-bit", 0x59, 512, 8, 0x2000, NAND_BUSWIDTH_16},
-#endif
-
- {"NAND 16MiB 1,8V 8-bit", 0x33, 512, 16, 0x4000, 0},
- {"NAND 16MiB 3,3V 8-bit", 0x73, 512, 16, 0x4000, 0},
- {"NAND 16MiB 1,8V 16-bit", 0x43, 512, 16, 0x4000, NAND_BUSWIDTH_16},
- {"NAND 16MiB 3,3V 16-bit", 0x53, 512, 16, 0x4000, NAND_BUSWIDTH_16},
-
- {"NAND 32MiB 1,8V 8-bit", 0x35, 512, 32, 0x4000, 0},
- {"NAND 32MiB 3,3V 8-bit", 0x75, 512, 32, 0x4000, 0},
- {"NAND 32MiB 1,8V 16-bit", 0x45, 512, 32, 0x4000, NAND_BUSWIDTH_16},
- {"NAND 32MiB 3,3V 16-bit", 0x55, 512, 32, 0x4000, NAND_BUSWIDTH_16},
-
- {"NAND 64MiB 1,8V 8-bit", 0x36, 512, 64, 0x4000, 0},
- {"NAND 64MiB 3,3V 8-bit", 0x76, 512, 64, 0x4000, 0},
- {"NAND 64MiB 1,8V 16-bit", 0x46, 512, 64, 0x4000, NAND_BUSWIDTH_16},
- {"NAND 64MiB 3,3V 16-bit", 0x56, 512, 64, 0x4000, NAND_BUSWIDTH_16},
-
- {"NAND 128MiB 1,8V 8-bit", 0x78, 512, 128, 0x4000, 0},
- {"NAND 128MiB 1,8V 8-bit", 0x39, 512, 128, 0x4000, 0},
- {"NAND 128MiB 3,3V 8-bit", 0x79, 512, 128, 0x4000, 0},
- {"NAND 128MiB 1,8V 16-bit", 0x72, 512, 128, 0x4000, NAND_BUSWIDTH_16},
- {"NAND 128MiB 1,8V 16-bit", 0x49, 512, 128, 0x4000, NAND_BUSWIDTH_16},
- {"NAND 128MiB 3,3V 16-bit", 0x74, 512, 128, 0x4000, NAND_BUSWIDTH_16},
- {"NAND 128MiB 3,3V 16-bit", 0x59, 512, 128, 0x4000, NAND_BUSWIDTH_16},
-
- {"NAND 256MiB 3,3V 8-bit", 0x71, 512, 256, 0x4000, 0},
-
- /*
- * These are the new chips with large page size. The pagesize and the
- * erasesize is determined from the extended id bytes
- */
-#define LP_OPTIONS (NAND_SAMSUNG_LP_OPTIONS | NAND_NO_READRDY | NAND_NO_AUTOINCR)
-#define LP_OPTIONS16 (LP_OPTIONS | NAND_BUSWIDTH_16)
-
- /*512 Megabit */
- {"NAND 64MiB 1,8V 8-bit", 0xA2, 0, 64, 0, LP_OPTIONS},
- {"NAND 64MiB 3,3V 8-bit", 0xF2, 0, 64, 0, LP_OPTIONS},
- {"NAND 64MiB 1,8V 16-bit", 0xB2, 0, 64, 0, LP_OPTIONS16},
- {"NAND 64MiB 3,3V 16-bit", 0xC2, 0, 64, 0, LP_OPTIONS16},
-
- /* 1 Gigabit */
- {"NAND 128MiB 1,8V 8-bit", 0xA1, 0, 128, 0, LP_OPTIONS},
- {"NAND 128MiB 3,3V 8-bit", 0xF1, 0, 128, 0, LP_OPTIONS},
- {"NAND 128MiB 1,8V 16-bit", 0xB1, 0, 128, 0, LP_OPTIONS16},
- {"NAND 128MiB 3,3V 16-bit", 0xC1, 0, 128, 0, LP_OPTIONS16},
-
- /* 2 Gigabit */
- {"NAND 256MiB 1,8V 8-bit", 0xAA, 0, 256, 0, LP_OPTIONS},
- {"NAND 256MiB 3,3V 8-bit", 0xDA, 0, 256, 0, LP_OPTIONS},
- {"NAND 256MiB 1,8V 16-bit", 0xBA, 0, 256, 0, LP_OPTIONS16},
- {"NAND 256MiB 3,3V 16-bit", 0xCA, 0, 256, 0, LP_OPTIONS16},
-
- /* 4 Gigabit */
- {"NAND 512MiB 1,8V 8-bit", 0xAC, 0, 512, 0, LP_OPTIONS},
- {"NAND 512MiB 3,3V 8-bit", 0xDC, 0, 512, 0, LP_OPTIONS},
- {"NAND 512MiB 1,8V 16-bit", 0xBC, 0, 512, 0, LP_OPTIONS16},
- {"NAND 512MiB 3,3V 16-bit", 0xCC, 0, 512, 0, LP_OPTIONS16},
-
- /* 8 Gigabit */
- {"NAND 1GiB 1,8V 8-bit", 0xA3, 0, 1024, 0, LP_OPTIONS},
- {"NAND 1GiB 3,3V 8-bit", 0xD3, 0, 1024, 0, LP_OPTIONS},
- {"NAND 1GiB 1,8V 16-bit", 0xB3, 0, 1024, 0, LP_OPTIONS16},
- {"NAND 1GiB 3,3V 16-bit", 0xC3, 0, 1024, 0, LP_OPTIONS16},
-
- /* 16 Gigabit */
- {"NAND 2GiB 1,8V 8-bit", 0xA5, 0, 2048, 0, LP_OPTIONS},
- {"NAND 2GiB 3,3V 8-bit", 0xD5, 0, 2048, 0, LP_OPTIONS},
- {"NAND 2GiB 1,8V 16-bit", 0xB5, 0, 2048, 0, LP_OPTIONS16},
- {"NAND 2GiB 3,3V 16-bit", 0xC5, 0, 2048, 0, LP_OPTIONS16},
-
- /*
- * Renesas AND 1 Gigabit. Those chips do not support extended id and
- * have a strange page/block layout ! The chosen minimum erasesize is
- * 4 * 2 * 2048 = 16384 Byte, as those chips have an array of 4 page
- * planes 1 block = 2 pages, but due to plane arrangement the blocks
- * 0-3 consists of page 0 + 4,1 + 5, 2 + 6, 3 + 7 Anyway JFFS2 would
- * increase the eraseblock size so we chose a combined one which can be
- * erased in one go There are more speed improvements for reads and
- * writes possible, but not implemented now
- */
- {"AND 128MiB 3,3V 8-bit", 0x01, 2048, 128, 0x4000,
- NAND_IS_AND | NAND_NO_AUTOINCR |NAND_NO_READRDY | NAND_4PAGE_ARRAY |
- BBT_AUTO_REFRESH
- },
-
- {NULL,}
-};
-
-/*
-* Manufacturer ID list
-*/
-struct nand_manufacturers nand_manuf_ids[] = {
- {NAND_MFR_TOSHIBA, "Toshiba"},
- {NAND_MFR_SAMSUNG, "Samsung"},
- {NAND_MFR_FUJITSU, "Fujitsu"},
- {NAND_MFR_NATIONAL, "National"},
- {NAND_MFR_RENESAS, "Renesas"},
- {NAND_MFR_STMICRO, "ST Micro"},
- {NAND_MFR_HYNIX, "Hynix"},
- {NAND_MFR_MICRON, "Micron"},
- {NAND_MFR_AMD, "AMD"},
- {0x0, "Unknown"}
-};
-
-EXPORT_SYMBOL(nand_manuf_ids);
-EXPORT_SYMBOL(nand_flash_ids);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
-MODULE_DESCRIPTION("Nand device & manufacturer IDs");
diff --git a/drivers/nand/nand_imx.c b/drivers/nand/nand_imx.c
deleted file mode 100644
index 74cdf10..0000000
--- a/drivers/nand/nand_imx.c
+++ /dev/null
@@ -1,1210 +0,0 @@
-/*
- * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
- * Copyright 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
- */
-
-/*
- * The code contained herein is licensed under the GNU General Public
- * License. You may obtain a copy of the GNU General Public License
- * Version 2 or later at the following locations:
- *
- * http://www.opensource.org/licenses/gpl-license.html
- * http://www.gnu.org/copyleft/gpl.html
- */
-
-/*
- * MX21 Hardware contains a bug which causes HW ECC to fail for two
- * consecutive read pages containing 1bit Errors (See MX21 Chip Erata,
- * Erratum 16). Use software ECC for this chip.
- */
-
-#include <common.h>
-#include <driver.h>
-#include <malloc.h>
-#include <init.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <mach/generic.h>
-#include <mach/imx-nand.h>
-#include <mach/imx-regs.h>
-#include <asm/io.h>
-#include <errno.h>
-
-#define DVR_VER "2.0"
-
-#define nfc_is_v21() (cpu_is_mx25() || cpu_is_mx35())
-#define nfc_is_v1() (cpu_is_mx31() || cpu_is_mx27() || cpu_is_mx21())
-
-/*
- * Addresses for NFC registers
- */
-#define NFC_BUF_SIZE 0xE00
-#define NFC_BUF_ADDR 0xE04
-#define NFC_FLASH_ADDR 0xE06
-#define NFC_FLASH_CMD 0xE08
-#define NFC_CONFIG 0xE0A
-#define NFC_ECC_STATUS_RESULT 0xE0C
-#define NFC_RSLTMAIN_AREA 0xE0E
-#define NFC_RSLTSPARE_AREA 0xE10
-#define NFC_SPAS 0xe10
-#define NFC_WRPROT 0xE12
-#define NFC_V1_UNLOCKSTART_BLKADDR 0xe14
-#define NFC_V1_UNLOCKEND_BLKADDR 0xe16
-#define NFC_V21_UNLOCKSTART_BLKADDR 0xe20
-#define NFC_V21_UNLOCKEND_BLKADDR 0xe22
-#define NFC_NF_WRPRST 0xE18
-#define NFC_CONFIG1 0xE1A
-#define NFC_CONFIG2 0xE1C
-
-/*
- * Addresses for NFC RAM BUFFER Main area 0
- */
-#define MAIN_AREA0 0x000
-#define MAIN_AREA1 0x200
-#define MAIN_AREA2 0x400
-#define MAIN_AREA3 0x600
-
-/*
- * Addresses for NFC SPARE BUFFER Spare area 0
- */
-#define SPARE_AREA0 0x800
-#define SPARE_AREA1 0x810
-#define SPARE_AREA2 0x820
-#define SPARE_AREA3 0x830
-
-/*
- * Set INT to 0, FCMD to 1, rest to 0 in NFC_CONFIG2 Register for Command
- * operation
- */
-#define NFC_CMD 0x1
-
-/*
- * Set INT to 0, FADD to 1, rest to 0 in NFC_CONFIG2 Register for Address
- * operation
- */
-#define NFC_ADDR 0x2
-
-/*
- * Set INT to 0, FDI to 1, rest to 0 in NFC_CONFIG2 Register for Input
- * operation
- */
-#define NFC_INPUT 0x4
-
-/*
- * Set INT to 0, FDO to 001, rest to 0 in NFC_CONFIG2 Register for Data Output
- * operation
- */
-#define NFC_OUTPUT 0x8
-
-/*
- * Set INT to 0, FD0 to 010, rest to 0 in NFC_CONFIG2 Register for Read ID
- * operation
- */
-#define NFC_ID 0x10
-
-/*
- * Set INT to 0, FDO to 100, rest to 0 in NFC_CONFIG2 Register for Read Status
- * operation
- */
-#define NFC_STATUS 0x20
-
-/*
- * Set INT to 1, rest to 0 in NFC_CONFIG2 Register for Read Status
- * operation
- */
-#define NFC_INT 0x8000
-
-#define NFC_ECC_MODE (1 << 0)
-#define NFC_SP_EN (1 << 2)
-#define NFC_ECC_EN (1 << 3)
-#define NFC_INT_MSK (1 << 4)
-#define NFC_BIG (1 << 5)
-#define NFC_RST (1 << 6)
-#define NFC_CE (1 << 7)
-#define NFC_ONE_CYCLE (1 << 8)
-
-#define NFC_SPAS_16 8
-#define NFC_SPAS_64 32
-#define NFC_SPAS_128 64
-#define NFC_SPAS_218 109
-
-#ifdef CONFIG_NAND_IMX_BOOT
-#define __nand_boot_init __bare_init
-#else
-#define __nand_boot_init
-#endif
-
-struct imx_nand_host {
- struct mtd_info mtd;
- struct nand_chip nand;
- struct mtd_partition *parts;
- struct device_d *dev;
-
- void *spare0;
- void *main_area0;
- void *main_area1;
-
- void __iomem *base;
- void __iomem *regs;
- int status_request;
- struct clk *clk;
-
- int pagesize_2k;
- uint8_t *data_buf;
- unsigned int buf_start;
- int spare_len;
-
-};
-
-/*
- * OOB placement block for use with hardware ecc generation
- */
-static struct nand_ecclayout nandv1_hw_eccoob_smallpage = {
- .eccbytes = 5,
- .eccpos = {6, 7, 8, 9, 10},
- .oobfree = {{0, 5}, {12, 4}}
-};
-
-static struct nand_ecclayout nandv1_hw_eccoob_largepage = {
- .eccbytes = 20,
- .eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26,
- 38, 39, 40, 41, 42, 54, 55, 56, 57, 58},
- .oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, }
-};
-
-/* OOB description for 512 byte pages with 16 byte OOB */
-static struct nand_ecclayout nandv2_hw_eccoob_smallpage = {
- .eccbytes = 1 * 9,
- .eccpos = {
- 7, 8, 9, 10, 11, 12, 13, 14, 15
- },
- .oobfree = {
- {.offset = 0, .length = 5}
- }
-};
-
-/* OOB description for 2048 byte pages with 64 byte OOB */
-static struct nand_ecclayout nandv2_hw_eccoob_largepage = {
- .eccbytes = 4 * 9,
- .eccpos = {
- 7, 8, 9, 10, 11, 12, 13, 14, 15,
- 23, 24, 25, 26, 27, 28, 29, 30, 31,
- 39, 40, 41, 42, 43, 44, 45, 46, 47,
- 55, 56, 57, 58, 59, 60, 61, 62, 63
- },
- .oobfree = {
- {.offset = 2, .length = 4},
- {.offset = 16, .length = 7},
- {.offset = 32, .length = 7},
- {.offset = 48, .length = 7}
- }
-};
-
-static void memcpy32(void *trg, const void *src, int size)
-{
- int i;
- unsigned int *t = trg;
- unsigned const int *s = src;
-
-#ifdef CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS
- if (!((unsigned long)trg & 0x3) && !((unsigned long)src & 0x3))
- memcpy(trg, src, size);
- else
-#endif
- for (i = 0; i < (size >> 2); i++)
- *t++ = *s++;
-}
-
-/*
- * This function polls the NANDFC to wait for the basic operation to complete by
- * checking the INT bit of config2 register.
- *
- * @param max_retries number of retry attempts (separated by 1 us)
- * @param param parameter for debug
- */
-static void __nand_boot_init wait_op_done(struct imx_nand_host *host)
-{
- u32 tmp;
- int i;
-
- /* This is a timeout of roughly 15ms on my system. We
- * need about 2us, but be generous. Don't use udelay
- * here as we might be here from nand booting.
- */
- for (i = 0; i < 100000; i++) {
- if (readw(host->regs + NFC_CONFIG2) & NFC_INT) {
- tmp = readw(host->regs + NFC_CONFIG2);
- tmp &= ~NFC_INT;
- writew(tmp, host->regs + NFC_CONFIG2);
- return;
- }
- }
-}
-
-/*
- * This function issues the specified command to the NAND device and
- * waits for completion.
- *
- * @param cmd command for NAND Flash
- */
-static void __nand_boot_init send_cmd(struct imx_nand_host *host, u16 cmd)
-{
- MTD_DEBUG(MTD_DEBUG_LEVEL3, "send_cmd(host, 0x%x)\n", cmd);
-
- writew(cmd, host->regs + NFC_FLASH_CMD);
- writew(NFC_CMD, host->regs + NFC_CONFIG2);
-
- if (cpu_is_mx21() && (cmd == NAND_CMD_RESET)) {
- /* Reset completion is indicated by NFC_CONFIG2 */
- /* being set to 0 */
- int i;
- for (i = 0; i < 100000; i++) {
- if (readw(host->regs + NFC_CONFIG2) == 0) {
- break;
- }
- }
- } else
- /* Wait for operation to complete */
- wait_op_done(host);
-}
-
-/*
- * This function sends an address (or partial address) to the
- * NAND device. The address is used to select the source/destination for
- * a NAND command.
- *
- * @param addr address to be written to NFC.
- * @param islast True if this is the last address cycle for command
- */
-static void __nand_boot_init noinline send_addr(struct imx_nand_host *host, u16 addr)
-{
- MTD_DEBUG(MTD_DEBUG_LEVEL3, "send_addr(host, 0x%x %d)\n", addr, islast);
-
- writew(addr, host->regs + NFC_FLASH_ADDR);
- writew(NFC_ADDR, host->regs + NFC_CONFIG2);
-
- /* Wait for operation to complete */
- wait_op_done(host);
-}
-
-/*
- * This function requests the NANDFC to initate the transfer
- * of data currently in the NANDFC RAM buffer to the NAND device.
- *
- * @param buf_id Specify Internal RAM Buffer number (0-3)
- * @param spare_only set true if only the spare area is transferred
- */
-static void __nand_boot_init send_page(struct imx_nand_host *host,
- unsigned int ops)
-{
- int bufs, i;
-
- if (nfc_is_v1() && host->pagesize_2k)
- bufs = 4;
- else
- bufs = 1;
-
- for (i = 0; i < bufs; i++) {
- /* NANDFC buffer 0 is used for page read/write */
- writew(i, host->regs + NFC_BUF_ADDR);
-
- writew(ops, host->regs + NFC_CONFIG2);
-
- /* Wait for operation to complete */
- wait_op_done(host);
- }
-}
-
-/*
- * This function requests the NANDFC to perform a read of the
- * NAND device ID.
- */
-static void send_read_id(struct imx_nand_host *host)
-{
- struct nand_chip *this = &host->nand;
- u16 tmp;
-
- /* NANDFC buffer 0 is used for device ID output */
- writew(0x0, host->regs + NFC_BUF_ADDR);
-
- /* Read ID into main buffer */
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp &= ~NFC_SP_EN;
- writew(tmp, host->regs + NFC_CONFIG1);
-
- writew(NFC_ID, host->regs + NFC_CONFIG2);
-
- /* Wait for operation to complete */
- wait_op_done(host);
-
- if (this->options & NAND_BUSWIDTH_16) {
- volatile u16 *mainbuf = host->main_area0;
-
- /*
- * Pack the every-other-byte result for 16-bit ID reads
- * into every-byte as the generic code expects and various
- * chips implement.
- */
-
- mainbuf[0] = (mainbuf[0] & 0xff) | ((mainbuf[1] & 0xff) << 8);
- mainbuf[1] = (mainbuf[2] & 0xff) | ((mainbuf[3] & 0xff) << 8);
- mainbuf[2] = (mainbuf[4] & 0xff) | ((mainbuf[5] & 0xff) << 8);
- }
- memcpy32(host->data_buf, host->main_area0, 16);
-}
-
-/*
- * This function requests the NANDFC to perform a read of the
- * NAND device status and returns the current status.
- *
- * @return device status
- */
-static u16 get_dev_status(struct imx_nand_host *host)
-{
- volatile u16 *mainbuf = host->main_area1;
- u32 store;
- u16 ret, tmp;
- /* Issue status request to NAND device */
-
- /* store the main area1 first word, later do recovery */
- store = *((u32 *) mainbuf);
- /*
- * NANDFC buffer 1 is used for device status to prevent
- * corruption of read/write buffer on status requests.
- */
- writew(1, host->regs + NFC_BUF_ADDR);
-
- /* Read status into main buffer */
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp &= ~NFC_SP_EN;
- writew(tmp, host->regs + NFC_CONFIG1);
-
- writew(NFC_STATUS, host->regs + NFC_CONFIG2);
-
- /* Wait for operation to complete */
- wait_op_done(host);
-
- /* Status is placed in first word of main buffer */
- /* get status, then recovery area 1 data */
- ret = mainbuf[0];
- *((u32 *) mainbuf) = store;
-
- return ret;
-}
-
-/*
- * This function is used by upper layer to checks if device is ready
- *
- * @param mtd MTD structure for the NAND Flash
- *
- * @return 0 if device is busy else 1
- */
-static int imx_nand_dev_ready(struct mtd_info *mtd)
-{
- /*
- * NFC handles R/B internally.Therefore,this function
- * always returns status as ready.
- */
- return 1;
-}
-
-static void imx_nand_enable_hwecc(struct mtd_info *mtd, int mode)
-{
- /*
- * If HW ECC is enabled, we turn it on during init. There is
- * no need to enable again here.
- */
-}
-
-static int imx_nand_correct_data(struct mtd_info *mtd, u_char * dat,
- u_char * read_ecc, u_char * calc_ecc)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct imx_nand_host *host = nand_chip->priv;
-
- /*
- * 1-Bit errors are automatically corrected in HW. No need for
- * additional correction. 2-Bit errors cannot be corrected by
- * HW ECC, so we need to return failure
- */
- u16 ecc_status = readw(host->regs + NFC_ECC_STATUS_RESULT);
-
- if (((ecc_status & 0x3) == 2) || ((ecc_status >> 2) == 2)) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0,
- "MXC_NAND: HWECC uncorrectable 2-bit ECC error\n");
- return -1;
- }
-
- return 0;
-}
-
-static int imx_nand_calculate_ecc(struct mtd_info *mtd, const u_char * dat,
- u_char * ecc_code)
-{
- return 0;
-}
-
-/*
- * This function reads byte from the NAND Flash
- *
- * @param mtd MTD structure for the NAND Flash
- *
- * @return data read from the NAND Flash
- */
-static u_char imx_nand_read_byte(struct mtd_info *mtd)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct imx_nand_host *host = nand_chip->priv;
- u_char ret;
-
- /* Check for status request */
- if (host->status_request)
- return get_dev_status(host) & 0xFF;
-
- ret = *(uint8_t *)(host->data_buf + host->buf_start);
- host->buf_start++;
-
- return ret;
-}
-
-/*
- * This function reads word from the NAND Flash
- *
- * @param mtd MTD structure for the NAND Flash
- *
- * @return data read from the NAND Flash
- */
-static u16 imx_nand_read_word(struct mtd_info *mtd)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct imx_nand_host *host = nand_chip->priv;
- uint16_t ret;
-
- ret = *(uint16_t *)(host->data_buf + host->buf_start);
- host->buf_start += 2;
-
- return ret;
-}
-
-/*
- * This function writes data of length \b len to buffer \b buf. The data to be
- * written on NAND Flash is first copied to RAMbuffer. After the Data Input
- * Operation by the NFC, the data is written to NAND Flash
- *
- * @param mtd MTD structure for the NAND Flash
- * @param buf data to be written to NAND Flash
- * @param len number of bytes to be written
- */
-static void imx_nand_write_buf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct imx_nand_host *host = nand_chip->priv;
- u16 col = host->buf_start;
- int n = mtd->oobsize + mtd->writesize - col;
-
- n = min(n, len);
- memcpy(host->data_buf + col, buf, n);
-
- host->buf_start += n;
-}
-
-/*
- * This function is used to read the data buffer from the NAND Flash. To
- * read the data from NAND Flash first the data output cycle is initiated by
- * the NFC, which copies the data to RAMbuffer. This data of length \b len is
- * then copied to buffer \b buf.
- *
- * @param mtd MTD structure for the NAND Flash
- * @param buf data to be read from NAND Flash
- * @param len number of bytes to be read
- */
-static void imx_nand_read_buf(struct mtd_info *mtd, u_char * buf, int len)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct imx_nand_host *host = nand_chip->priv;
- u16 col = host->buf_start;
- int n = mtd->oobsize + mtd->writesize - col;
-
- n = min(n, len);
-
- memcpy(buf, host->data_buf + col, len);
-
- host->buf_start += len;
-}
-
-/*
- * Function to transfer data to/from spare area.
- */
-static void copy_spare(struct mtd_info *mtd, int bfrom)
-{
- struct nand_chip *this = mtd->priv;
- struct imx_nand_host *host = this->priv;
- u16 i, j;
- u16 n = mtd->writesize >> 9;
- u8 *d = host->data_buf + mtd->writesize;
- u8 *s = host->spare0;
- u16 t = host->spare_len;
-
- j = (mtd->oobsize / n >> 1) << 1;
-
- if (bfrom) {
- for (i = 0; i < n - 1; i++)
- memcpy32(d + i * j, s + i * t, j);
-
- /* the last section */
- memcpy32(d + i * j, s + i * t, mtd->oobsize - i * j);
- } else {
- for (i = 0; i < n - 1; i++)
- memcpy32(&s[i * t], &d[i * j], j);
-
- /* the last section */
- memcpy32(&s[i * t], &d[i * j], mtd->oobsize - i * j);
- }
-}
-
-/*
- * This function is used by the upper layer to verify the data in NAND Flash
- * with the data in the \b buf.
- *
- * @param mtd MTD structure for the NAND Flash
- * @param buf data to be verified
- * @param len length of the data to be verified
- *
- * @return -EFAULT if error else 0
- *
- */
-static int
-imx_nand_verify_buf(struct mtd_info *mtd, const u_char * buf, int len)
-{
- return -EFAULT;
-}
-
-/*
- * This function is used by upper layer for select and deselect of the NAND
- * chip
- *
- * @param mtd MTD structure for the NAND Flash
- * @param chip val indicating select or deselect
- */
-static void imx_nand_select_chip(struct mtd_info *mtd, int chip)
-{
-#ifdef CONFIG_MTD_NAND_MXC_FORCE_CE
- u16 tmp;
-
- if (chip > 0) {
- MTD_DEBUG(MTD_DEBUG_LEVEL0,
- "ERROR: Illegal chip select (chip = %d)\n", chip);
- return;
- }
-
- if (chip == -1) {
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp &= ~NFC_CE;
- writew(tmp, host->regs + NFC_CONFIG1);
- return;
- }
-
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp |= NFC_CE;
- writew(tmp, host->regs + NFC_CONFIG1);
-#endif
-}
-
-static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct imx_nand_host *host = nand_chip->priv;
-
- /*
- * Write out column address, if necessary
- */
- if (column != -1) {
- /*
- * MXC NANDFC can only perform full page+spare or
- * spare-only read/write. When the upper layers
- * layers perform a read/write buf operation,
- * we will used the saved column adress to index into
- * the full page.
- */
- send_addr(host, 0);
- if (host->pagesize_2k)
- /* another col addr cycle for 2k page */
- send_addr(host, 0);
- }
-
- /*
- * Write out page address, if necessary
- */
- if (page_addr != -1) {
- send_addr(host, (page_addr & 0xff)); /* paddr_0 - p_addr_7 */
-
- if (host->pagesize_2k) {
- send_addr(host, (page_addr >> 8) & 0xFF);
- if (mtd->size >= 0x10000000) {
- send_addr(host, (page_addr >> 16) & 0xff);
- }
- } else {
- /* One more address cycle for higher density devices */
- if (mtd->size >= 0x4000000) {
- /* paddr_8 - paddr_15 */
- send_addr(host, (page_addr >> 8) & 0xff);
- send_addr(host, (page_addr >> 16) & 0xff);
- } else
- /* paddr_8 - paddr_15 */
- send_addr(host, (page_addr >> 8) & 0xff);
- }
- }
-}
-
-/*
- * This function is used by the upper layer to write command to NAND Flash for
- * different operations to be carried out on NAND Flash
- *
- * @param mtd MTD structure for the NAND Flash
- * @param command command for NAND Flash
- * @param column column offset for the page read
- * @param page_addr page to be read from NAND Flash
- */
-static void imx_nand_command(struct mtd_info *mtd, unsigned command,
- int column, int page_addr)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct imx_nand_host *host = nand_chip->priv;
-
- MTD_DEBUG(MTD_DEBUG_LEVEL3,
- "imx_nand_command (cmd = 0x%x, col = 0x%x, page = 0x%x)\n",
- command, column, page_addr);
-
- /*
- * Reset command state information
- */
- host->status_request = 0;
-
- /*
- * Command pre-processing step
- */
- switch (command) {
-
- case NAND_CMD_STATUS:
- host->buf_start = 0;
- host->status_request = 1;
- send_cmd(host, command);
- mxc_do_addr_cycle(mtd, column, page_addr);
- break;
-
- case NAND_CMD_READ0:
- case NAND_CMD_READOOB:
- if (command == NAND_CMD_READ0)
- host->buf_start = column;
- else
- host->buf_start = column + mtd->writesize;
-
- command = NAND_CMD_READ0;
-
- send_cmd(host, command);
- mxc_do_addr_cycle(mtd, column, page_addr);
-
- if (host->pagesize_2k)
- /* send read confirm command */
- send_cmd(host, NAND_CMD_READSTART);
-
- send_page(host, NFC_OUTPUT);
-
- memcpy32(host->data_buf, host->main_area0, mtd->writesize);
- copy_spare(mtd, 1);
- break;
-
- case NAND_CMD_SEQIN:
- if (column >= mtd->writesize) {
- if (host->pagesize_2k) {
- /**
- * FIXME: before send SEQIN command for write
- * OOB, we must read one page out. For K9F1GXX
- * has no READ1 command to set current HW
- * pointer to spare area, we must write the
- * whole page including OOB together.
- */
- /* call ourself to read a page */
- imx_nand_command(mtd, NAND_CMD_READ0, 0,
- page_addr);
- }
- host->buf_start = column;
-
- /* Set program pointer to spare region */
- if (!host->pagesize_2k)
- send_cmd(host, NAND_CMD_READOOB);
- } else {
- host->buf_start = column;
-
- /* Set program pointer to page start */
- if (!host->pagesize_2k)
- send_cmd(host, NAND_CMD_READ0);
- }
- send_cmd(host, command);
- mxc_do_addr_cycle(mtd, column, page_addr);
-
- break;
-
- case NAND_CMD_PAGEPROG:
- memcpy32(host->main_area0, host->data_buf, mtd->writesize);
- copy_spare(mtd, 0);
- send_page(host, NFC_INPUT);
- send_cmd(host, command);
- mxc_do_addr_cycle(mtd, column, page_addr);
- break;
-
- case NAND_CMD_READID:
- send_cmd(host, command);
- mxc_do_addr_cycle(mtd, column, page_addr);
- host->buf_start = 0;
- send_read_id(host);
- break;
-
- case NAND_CMD_ERASE1:
- case NAND_CMD_ERASE2:
- case NAND_CMD_RESET:
- send_cmd(host, command);
- mxc_do_addr_cycle(mtd, column, page_addr);
- break;
- }
-}
-
-#ifdef CONFIG_MXC_NAND_LOW_LEVEL_ERASE
-static void imx_low_erase(struct mtd_info *mtd)
-{
-
- struct nand_chip *this = mtd->priv;
- unsigned int page_addr, addr;
- u_char status;
-
- MTD_DEBUG(MTD_DEBUG_LEVEL0, "MXC_ND : imx_low_erase:Erasing NAND\n");
- for (addr = 0; addr < this->chipsize; addr += mtd->erasesize) {
- page_addr = addr / mtd->writesize;
- imx_nand_command(mtd, NAND_CMD_ERASE1, -1, page_addr);
- imx_nand_command(mtd, NAND_CMD_ERASE2, -1, -1);
- imx_nand_command(mtd, NAND_CMD_STATUS, -1, -1);
- status = imx_nand_read_byte(mtd);
- if (status & NAND_STATUS_FAIL) {
- printk(KERN_ERR
- "ERASE FAILED(block = %d,status = 0x%x)\n",
- addr / mtd->erasesize, status);
- }
- }
-
-}
-#endif
-
-/*
- * The generic flash bbt decriptors overlap with our ecc
- * hardware, so define some i.MX specific ones.
- */
-static uint8_t bbt_pattern[] = { 'B', 'b', 't', '0' };
-static uint8_t mirror_pattern[] = { '1', 't', 'b', 'B' };
-
-static struct nand_bbt_descr bbt_main_descr = {
- .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
- | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
- .offs = 0,
- .len = 4,
- .veroffs = 4,
- .maxblocks = 4,
- .pattern = bbt_pattern,
-};
-
-static struct nand_bbt_descr bbt_mirror_descr = {
- .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
- | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
- .offs = 0,
- .len = 4,
- .veroffs = 4,
- .maxblocks = 4,
- .pattern = mirror_pattern,
-};
-
-/*
- * This function is called during the driver binding process.
- *
- * @param pdev the device structure used to store device specific
- * information that is used by the suspend, resume and
- * remove functions
- *
- * @return The function always returns 0.
- */
-
-static int __init imxnd_probe(struct device_d *dev)
-{
- struct nand_chip *this;
- struct mtd_info *mtd;
- struct imx_nand_platform_data *pdata = dev->platform_data;
- struct imx_nand_host *host;
- struct nand_ecclayout *oob_smallpage, *oob_largepage;
- u16 tmp;
- int err = 0;
-
-#ifdef CONFIG_ARCH_IMX27
- PCCR1 |= PCCR1_NFC_BAUDEN;
-#endif
-#ifdef CONFIG_ARCH_IMX21
- PCCR0 |= PCCR0_NFC_EN;
-#endif
- /* Allocate memory for MTD device structure and private data */
- host = kzalloc(sizeof(struct imx_nand_host) + NAND_MAX_PAGESIZE +
- NAND_MAX_OOBSIZE, GFP_KERNEL);
- if (!host)
- return -ENOMEM;
-
- host->data_buf = (uint8_t *)(host + 1);
- host->base = (void __iomem *)dev->map_base;
-
- host->main_area0 = host->base;
- host->main_area1 = host->base + 0x200;
-
- if (nfc_is_v21()) {
- host->regs = host->base + 0x1000;
- host->spare0 = host->base + 0x1000;
- host->spare_len = 64;
- oob_smallpage = &nandv2_hw_eccoob_smallpage;
- oob_largepage = &nandv2_hw_eccoob_largepage;
- } else if (nfc_is_v1()) {
- host->regs = host->base;
- host->spare0 = host->base + 0x800;
- host->spare_len = 16;
- oob_smallpage = &nandv1_hw_eccoob_smallpage;
- oob_largepage = &nandv1_hw_eccoob_largepage;
- }
-
- host->dev = dev;
- /* structures must be linked */
- this = &host->nand;
- mtd = &host->mtd;
- mtd->priv = this;
-
- /* 50 us command delay time */
- this->chip_delay = 5;
-
- this->priv = host;
- this->dev_ready = imx_nand_dev_ready;
- this->cmdfunc = imx_nand_command;
- this->select_chip = imx_nand_select_chip;
- this->read_byte = imx_nand_read_byte;
- this->read_word = imx_nand_read_word;
- this->write_buf = imx_nand_write_buf;
- this->read_buf = imx_nand_read_buf;
- this->verify_buf = imx_nand_verify_buf;
-#if 0
- host->clk = clk_get(&pdev->dev, "nfc_clk");
- if (IS_ERR(host->clk))
- goto eclk;
-
- clk_enable(host->clk);
-#endif
-
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp |= NFC_INT_MSK;
- tmp &= ~NFC_SP_EN;
- if (nfc_is_v21())
- /* currently no support for 218 byte OOB with stronger ECC */
- tmp |= NFC_ECC_MODE;
- writew(tmp, host->regs + NFC_CONFIG1);
-
- if (pdata->hw_ecc) {
- this->ecc.calculate = imx_nand_calculate_ecc;
- this->ecc.hwctl = imx_nand_enable_hwecc;
- this->ecc.correct = imx_nand_correct_data;
- this->ecc.mode = NAND_ECC_HW;
- this->ecc.size = 512;
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp |= NFC_ECC_EN;
- writew(tmp, host->regs + NFC_CONFIG1);
- } else {
- this->ecc.size = 512;
- this->ecc.mode = NAND_ECC_SOFT;
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp &= ~NFC_ECC_EN;
- writew(tmp, host->regs + NFC_CONFIG1);
- }
-
- /* Reset NAND */
- this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
-
- /* preset operation */
- /* Unlock the internal RAM Buffer */
- writew(0x2, host->regs + NFC_CONFIG);
-
- /* Blocks to be unlocked */
- if (nfc_is_v21()) {
- writew(0x0, host->regs + NFC_V21_UNLOCKSTART_BLKADDR);
- writew(0xffff, host->regs + NFC_V21_UNLOCKEND_BLKADDR);
- this->ecc.bytes = 9;
- } else if (nfc_is_v1()) {
- writew(0x0, host->regs + NFC_V1_UNLOCKSTART_BLKADDR);
- writew(0x4000, host->regs + NFC_V1_UNLOCKEND_BLKADDR);
- this->ecc.bytes = 3;
- }
-
- /* Unlock Block Command for given address range */
- writew(0x4, host->regs + NFC_WRPROT);
-
- this->ecc.layout = oob_smallpage;
-
- /* NAND bus width determines access funtions used by upper layer */
- if (pdata->width == 2) {
- this->options |= NAND_BUSWIDTH_16;
- this->ecc.layout = &nandv1_hw_eccoob_smallpage;
- imx_nand_set_layout(0, 16);
- }
-
- if (pdata->flash_bbt) {
- this->bbt_td = &bbt_main_descr;
- this->bbt_md = &bbt_mirror_descr;
- /* update flash based bbt */
- this->options |= NAND_USE_FLASH_BBT;
- }
-
- /* first scan to find the device and get the page size */
- if (nand_scan_ident(mtd, 1)) {
- err = -ENXIO;
- goto escan;
- }
-
- imx_nand_set_layout(mtd->writesize, pdata->width == 2 ? 16 : 8);
-
- if (mtd->writesize == 2048) {
- this->ecc.layout = oob_largepage;
- host->pagesize_2k = 1;
- if (nfc_is_v21()) {
- tmp = readw(host->regs + NFC_SPAS);
- tmp &= 0xff00;
- tmp |= NFC_SPAS_64;
- writew(tmp, host->regs + NFC_SPAS);
- }
- } else {
- if (nfc_is_v21()) {
- tmp = readw(host->regs + NFC_SPAS);
- tmp &= 0xff00;
- tmp |= NFC_SPAS_16;
- writew(tmp, host->regs + NFC_SPAS);
- }
- }
-
- /* second phase scan */
- if (nand_scan_tail(mtd)) {
- err = -ENXIO;
- goto escan;
- }
-
- add_mtd_device(mtd);
-
- dev->priv = host;
-
- return 0;
-
-escan:
- kfree(host);
-
- return err;
-
-}
-
-static struct driver_d imx_nand_driver = {
- .name = "imx_nand",
- .probe = imxnd_probe,
-};
-
-#ifdef CONFIG_NAND_IMX_BOOT
-
-static void __nand_boot_init nfc_addr(struct imx_nand_host *host, u32 offs)
-{
- if (host->pagesize_2k) {
- send_addr(host, offs & 0xff);
- send_addr(host, offs & 0xff);
- send_addr(host, (offs >> 11) & 0xff);
- send_addr(host, (offs >> 19) & 0xff);
- send_addr(host, (offs >> 27) & 0xff);
- } else {
- send_addr(host, offs & 0xff);
- send_addr(host, (offs >> 9) & 0xff);
- send_addr(host, (offs >> 17) & 0xff);
- send_addr(host, (offs >> 25) & 0xff);
- }
-}
-
-static void __nand_boot_init __memcpy32(void *trg, const void *src, int size)
-{
- int i;
- unsigned int *t = trg;
- unsigned const int *s = src;
-
- for (i = 0; i < (size >> 2); i++)
- *t++ = *s++;
-}
-
-void __nand_boot_init imx_nand_load_image(void *dest, int size)
-{
- struct imx_nand_host host;
- u32 tmp, page, block, blocksize, pagesize;
-#ifdef CONFIG_ARCH_IMX21
- tmp = readl(IMX_SYSTEM_CTL_BASE + 0x14);
- if (tmp & (1 << 5))
- host.pagesize_2k = 1;
- else
- host.pagesize_2k = 0;
-#endif
-#ifdef CONFIG_ARCH_IMX27
- tmp = readl(IMX_SYSTEM_CTL_BASE + 0x14);
- if (tmp & (1 << 5))
- host.pagesize_2k = 1;
- else
- host.pagesize_2k = 0;
-#endif
-#ifdef CONFIG_ARCH_IMX31
- tmp = readl(IMX_CCM_BASE + CCM_RCSR);
- if (tmp & RCSR_NFMS)
- host.pagesize_2k = 1;
- else
- host.pagesize_2k = 0;
-#endif
-#ifdef CONFIG_ARCH_IMX35
- if (readl(IMX_CCM_BASE + CCM_RCSR) & (1 << 8))
- host.pagesize_2k = 1;
- else
- host.pagesize_2k = 0;
-#endif
- if (host.pagesize_2k) {
- pagesize = 2048;
- blocksize = 128 * 1024;
- } else {
- pagesize = 512;
- blocksize = 16 * 1024;
- }
-
- host.base = (void __iomem *)IMX_NFC_BASE;
- if (nfc_is_v21()) {
- host.regs = host.base + 0x1000;
- host.spare0 = host.base + 0x1000;
- host.spare_len = 64;
- } else if (nfc_is_v1()) {
- host.regs = host.base;
- host.spare0 = host.base + 0x800;
- host.spare_len = 16;
- }
-
- send_cmd(&host, NAND_CMD_RESET);
-
- /* preset operation */
- /* Unlock the internal RAM Buffer */
- writew(0x2, host.regs + NFC_CONFIG);
-
- /* Unlock Block Command for given address range */
- writew(0x4, host.regs + NFC_WRPROT);
-
- tmp = readw(host.regs + NFC_CONFIG1);
- tmp |= NFC_ECC_EN;
- if (nfc_is_v21())
- /* currently no support for 218 byte OOB with stronger ECC */
- tmp |= NFC_ECC_MODE;
- tmp &= ~(NFC_SP_EN | NFC_INT_MSK);
- writew(tmp, host.regs + NFC_CONFIG1);
-
- if (nfc_is_v21()) {
- if (host.pagesize_2k) {
- tmp = readw(host.regs + NFC_SPAS);
- tmp &= 0xff00;
- tmp |= NFC_SPAS_64;
- writew(tmp, host.regs + NFC_SPAS);
- } else {
- tmp = readw(host.regs + NFC_SPAS);
- tmp &= 0xff00;
- tmp |= NFC_SPAS_16;
- writew(tmp, host.regs + NFC_SPAS);
- }
- }
-
- block = page = 0;
-
- while (1) {
- page = 0;
- while (page * pagesize < blocksize) {
- debug("page: %d block: %d dest: %p src "
- "0x%08x\n",
- page, block, dest,
- block * blocksize +
- page * pagesize);
-
- send_cmd(&host, NAND_CMD_READ0);
- nfc_addr(&host, block * blocksize +
- page * pagesize);
- if (host.pagesize_2k)
- send_cmd(&host, NAND_CMD_READSTART);
- send_page(&host, NFC_OUTPUT);
- page++;
-
- if (host.pagesize_2k) {
- if ((readw(host.spare0) & 0xff)
- != 0xff)
- continue;
- } else {
- if ((readw(host.spare0 + 4) & 0xff00)
- != 0xff00)
- continue;
- }
-
- __memcpy32(dest, host.base, pagesize);
- dest += pagesize;
- size -= pagesize;
-
- if (size <= 0)
- return;
- }
- block++;
- }
-}
-#define CONFIG_NAND_IMX_BOOT_DEBUG
-#ifdef CONFIG_NAND_IMX_BOOT_DEBUG
-#include <command.h>
-
-static int do_nand_boot_test(struct command *cmdtp, int argc, char *argv[])
-{
- void *dest;
- int size;
-
- if (argc < 3)
- return COMMAND_ERROR_USAGE;
-
- dest = (void *)strtoul_suffix(argv[1], NULL, 0);
- size = strtoul_suffix(argv[2], NULL, 0);
-
- imx_nand_load_image(dest, size);
-
- return 0;
-}
-
-static const __maybe_unused char cmd_nand_boot_test_help[] =
-"Usage: nand_boot_test <dest> <size>\n"
-"This command loads the booloader from the NAND memory like the reset\n"
-"routine does. Its intended for development tests only";
-
-BAREBOX_CMD_START(nand_boot_test)
- .cmd = do_nand_boot_test,
- .usage = "load bootloader from NAND",
- BAREBOX_CMD_HELP(cmd_nand_boot_test_help)
-BAREBOX_CMD_END
-#endif
-
-#endif /* CONFIG_NAND_IMX_BOOT */
-
-/*
- * Main initialization routine
- * @return 0 if successful; non-zero otherwise
- */
-static int __init imx_nand_init(void)
-{
- return register_driver(&imx_nand_driver);
-}
-
-device_initcall(imx_nand_init);
-
-MODULE_AUTHOR("Freescale Semiconductor, Inc.");
-MODULE_DESCRIPTION("MXC NAND MTD driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/nand/nand_omap_gpmc.c b/drivers/nand/nand_omap_gpmc.c
deleted file mode 100644
index c6647e5..0000000
--- a/drivers/nand/nand_omap_gpmc.c
+++ /dev/null
@@ -1,534 +0,0 @@
-/**
- * @file
- * @brief Provide Generic GPMC NAND implementation for OMAP platforms
- *
- * FileName: arch/arm/mach-omap/gpmc_nand.c
- *
- * GPMC has a NAND controller inbuilt. This provides a generic implementation
- * for board files to register a nand device. drivers/nand/nand_base.c takes
- * care of identifing the type of device, size etc.
- *
- * A typical device registration is as follows:
- *
- * @code
- * static struct device_d my_nand_device = {
- * .name = "gpmc_nand",
- * .id = some identifier you need to show.. e.g. "gpmc_nand0"
- * .map_base = GPMC base address
- * .size = GPMC address map size.
- * .platform_data = platform data - required - explained below
- * };
- * platform data required:
- * static struct gpmc_nand_platform_data nand_plat = {
- * .cs = give the chip select of the device
- * .device_width = what is the width of the device 8 or 16?
- * .max_timeout = delay desired for operation
- * .wait_mon_pin = do you use wait monitoring? if so wait pin
- * .plat_options = platform options.
- * NAND_HWECC_ENABLE/DISABLE - hw ecc enable/disable
- * NAND_WAITPOL_LOW/HIGH - wait pin polarity
- * .oob = if you would like to replace oob with a custom OOB.
- * .nand_setup = if you would like a special setup function to be called
- * .priv = any params you'd like to save(e.g. like nand_setup to use)
- *};
- * then in your code, you'd device_register(&my_nand_device);
- * @endcode
- *
- * Note:
- * @li Enable CONFIG_NAND_OMAP_GPMC_HWECC in menuconfig to get H/w ECC support
- * @li You may choose to register two "devices" for the same CS to get BOTH
- * hwecc and swecc devices.
- * @li You can choose to have your own OOB definition for compliance with ROM
- * code organization - only if you dont want to use NAND's default oob layout.
- * see GPMC_NAND_ECC_LP_x8_LAYOUT etc..
- *
- * @see gpmc_nand_platform_data
- * @warning Remember to initialize GPMC before initializing the nand dev.
- */
-/*
- * (C) Copyright 2008
- * Texas Instruments, <www.ti.com>
- * Nishanth Menon <x0nishan@ti.com>
- *
- * Based on:
- * drivers/mtd/nand/omap2.c from linux kernel
- *
- * Copyright (c) 2004 Texas Instruments, Jian Zhang <jzhang@ti.com>
- * Copyright (c) 2004 Micron Technology Inc.
- * Copyright (c) 2004 David Brownell
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <common.h>
-#include <errno.h>
-#include <init.h>
-#include <driver.h>
-#include <malloc.h>
-#include <clock.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/nand_ecc.h>
-#include <asm/io.h>
-#include <mach/silicon.h>
-#include <mach/gpmc.h>
-#include <mach/gpmc_nand.h>
-
-/* Enable me to get tons of debug messages -for use without jtag */
-#if 0
-#define gpmcnand_dbg(FORMAT, ARGS...) fprintf(stdout,\
- "gpmc_nand:%s:%d:Entry:"FORMAT"\n",\
- __func__, __LINE__, ARGS)
-#else
-#define gpmcnand_dbg(FORMAT, ARGS...)
-#endif
-#define gpmcnand_err(ARGS...) fprintf(stderr, "omapnand: " ARGS);
-
-/** internal structure maintained for nand information */
-struct gpmc_nand_info {
- struct nand_hw_control controller;
- struct device_d *pdev;
- struct gpmc_nand_platform_data *pdata;
- struct nand_chip nand;
- struct mtd_info minfo;
- int gpmc_cs;
- void *gpmc_command;
- void *gpmc_address;
- void *gpmc_data;
- unsigned long gpmc_base;
- unsigned char wait_mon_mask;
- uint64_t timeout;
- unsigned inuse:1;
- unsigned wait_pol:1;
-#ifdef CONFIG_NAND_OMAP_GPMC_HWECC
- unsigned char ecc_parity_pairs;
- unsigned int ecc_config;
-#endif
-};
-
-/**
- * @brief calls the platform specific dev_ready functionds
- *
- * @param mtd - mtd info structure
- *
- * @return
- */
-static int omap_dev_ready(struct mtd_info *mtd)
-{
- struct nand_chip *nand = (struct nand_chip *)(mtd->priv);
- struct gpmc_nand_info *oinfo = (struct gpmc_nand_info *)(nand->priv);
- uint64_t start = get_time_ns();
- unsigned long comp;
-
- gpmcnand_dbg("mtd=%x", (unsigned int)mtd);
- /* What do we mean by assert and de-assert? */
- comp = (oinfo->wait_pol == NAND_WAITPOL_HIGH) ?
- oinfo->wait_mon_mask : 0x0;
- while (1) {
- /* Breakout condition */
- if (is_timeout(start, oinfo->timeout)) {
- gpmcnand_err("timedout\n");
- return -ETIMEDOUT;
- }
- /* if the wait is released, we are good to go */
- if (comp ==
- (readl(oinfo->gpmc_base + GPMC_STATUS) &&
- oinfo->wait_mon_mask))
- break;
- }
- return 0;
-}
-
-/**
- * @brief This function will enable or disable the Write Protect feature on
- * NAND device. GPMC has a single WP bit for all CS devices..
- *
- * @param oinfo omap nand info
- * @param mode 0-disable else enable
- *
- * @return none
- */
-static void gpmc_nand_wp(struct gpmc_nand_info *oinfo, int mode)
-{
- unsigned long config = readl(oinfo->gpmc_base + GPMC_CFG);
-
- gpmcnand_dbg("mode=%x", mode);
- if (mode)
- config &= ~(NAND_WP_BIT); /* WP is ON */
- else
- config |= (NAND_WP_BIT); /* WP is OFF */
-
- writel(config, oinfo->gpmc_base + GPMC_CFG);
-}
-
-/**
- * @brief respond to hw event change request
- *
- * MTD layer uses NAND_CTRL_CLE etc to control selection of the latch
- * we hoodwink by changing the R and W registers according to the state
- * we are requested.
- *
- * @param mtd - mtd info structure
- * @param cmd command mtd layer is requesting
- *
- * @return none
- */
-static void omap_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
-{
- struct nand_chip *nand = (struct nand_chip *)(mtd->priv);
- struct gpmc_nand_info *oinfo = (struct gpmc_nand_info *)(nand->priv);
- gpmcnand_dbg("mtd=%x nand=%x cmd=%x ctrl = %x", (unsigned int)mtd, nand,
- cmd, ctrl);
- switch (ctrl) {
- case NAND_CTRL_CHANGE | NAND_CTRL_CLE:
- nand->IO_ADDR_W = oinfo->gpmc_command;
- nand->IO_ADDR_R = oinfo->gpmc_data;
- break;
-
- case NAND_CTRL_CHANGE | NAND_CTRL_ALE:
- nand->IO_ADDR_W = oinfo->gpmc_address;
- nand->IO_ADDR_R = oinfo->gpmc_data;
- break;
-
- case NAND_CTRL_CHANGE | NAND_NCE:
- nand->IO_ADDR_W = oinfo->gpmc_data;
- nand->IO_ADDR_R = oinfo->gpmc_data;
- break;
- }
-
- if (cmd != NAND_CMD_NONE)
- writeb(cmd, nand->IO_ADDR_W);
- return;
-}
-
-#ifdef CONFIG_NAND_OMAP_GPMC_HWECC
-
-/**
- * @brief This function will generate true ECC value, which can be used
- * when correcting data read from NAND flash memory core
- *
- * @param ecc_buf buffer to store ecc code
- *
- * @return re-formatted ECC value
- */
-static unsigned int gen_true_ecc(u8 *ecc_buf)
-{
- gpmcnand_dbg("ecc_buf=%x 1, 2 3 = %x %x %x", (unsigned int)ecc_buf,
- ecc_buf[0], ecc_buf[1], ecc_buf[2]);
- return ecc_buf[0] | (ecc_buf[1] << 16) | ((ecc_buf[2] & 0xF0) << 20) |
- ((ecc_buf[2] & 0x0F) << 8);
-}
-
-/**
- * @brief Compares the ecc read from nand spare area with ECC
- * registers values and corrects one bit error if it has occured
- * Further details can be had from OMAP TRM and the following selected links:
- * http://en.wikipedia.org/wiki/Hamming_code
- * http://www.cs.utexas.edu/users/plaxton/c/337/05f/slides/ErrorCorrection-4.pdf
- *
- * @param mtd - mtd info structure
- * @param dat page data
- * @param read_ecc ecc readback
- * @param calc_ecc calculated ecc (from reg)
- *
- * @return 0 if data is OK or corrected, else returns -1
- */
-static int omap_correct_data(struct mtd_info *mtd, uint8_t *dat,
- uint8_t *read_ecc, uint8_t *calc_ecc)
-{
- unsigned int orig_ecc, new_ecc, res, hm;
- unsigned short parity_bits, byte;
- unsigned char bit;
- struct nand_chip *nand = (struct nand_chip *)(mtd->priv);
- struct gpmc_nand_info *oinfo = (struct gpmc_nand_info *)(nand->priv);
-
- gpmcnand_dbg("mtd=%x dat=%x read_ecc=%x calc_ecc=%x", (unsigned int)mtd,
- (unsigned int)dat, (unsigned int)read_ecc,
- (unsigned int)calc_ecc);
-
- /* Regenerate the orginal ECC */
- orig_ecc = gen_true_ecc(read_ecc);
- new_ecc = gen_true_ecc(calc_ecc);
- /* Get the XOR of real ecc */
- res = orig_ecc ^ new_ecc;
- if (res) {
- /* Get the hamming width */
- hm = hweight32(res);
- /* Single bit errors can be corrected! */
- if (hm == oinfo->ecc_parity_pairs) {
- /* Correctable data! */
- parity_bits = res >> 16;
- bit = (parity_bits & 0x7);
- byte = (parity_bits >> 3) & 0x1FF;
- /* Flip the bit to correct */
- dat[byte] ^= (0x1 << bit);
-
- } else if (hm == 1) {
- gpmcnand_err("Ecc is wrong\n");
- /* ECC itself is corrupted */
- return 2;
- } else {
- gpmcnand_err("bad compare! failed\n");
- /* detected 2 bit error */
- return -1;
- }
- }
- return 0;
-}
-
-/**
- * @brief Using noninverted ECC can be considered ugly since writing a blank
- * page ie. padding will clear the ECC bytes. This is no problem as long
- * nobody is trying to write data on the seemingly unused page. Reading
- * an erased page will produce an ECC mismatch between generated and read
- * ECC bytes that has to be dealt with separately.
- *
- * @param mtd - mtd info structure
- * @param dat data being written
- * @param ecc_code ecc code returned back to nand layer
- *
- * @return 0
- */
-static int omap_calculate_ecc(struct mtd_info *mtd, const uint8_t *dat,
- uint8_t *ecc_code)
-{
- struct nand_chip *nand = (struct nand_chip *)(mtd->priv);
- struct gpmc_nand_info *oinfo = (struct gpmc_nand_info *)(nand->priv);
- unsigned int val;
- gpmcnand_dbg("mtd=%x dat=%x ecc_code=%x", (unsigned int)mtd,
- (unsigned int)dat, (unsigned int)ecc_code);
- debug("ecc 0 1 2 = %x %x %x", ecc_code[0], ecc_code[1], ecc_code[2]);
-
- /* Since we smartly tell mtd driver to use eccsize of 512, only
- * ECC Reg1 will be used.. we just read that */
- val = readl(oinfo->gpmc_base + GPMC_ECC1_RESULT);
- ecc_code[0] = val & 0xFF;
- ecc_code[1] = (val >> 16) & 0xFF;
- ecc_code[2] = ((val >> 8) & 0x0f) | ((val >> 20) & 0xf0);
-
- /* Stop reading anymore ECC vals and clear old results
- * enable will be called if more reads are required */
- writel(0x000, oinfo->gpmc_base + GPMC_ECC_CONFIG);
- return 0;
-}
-
-/*
- * omap_enable_ecc - This function enables the hardware ecc functionality
- * @param mtd - mtd info structure
- * @param mode - Read/Write mode
- */
-static void omap_enable_hwecc(struct mtd_info *mtd, int mode)
-{
- struct nand_chip *nand = (struct nand_chip *)(mtd->priv);
- struct gpmc_nand_info *oinfo = (struct gpmc_nand_info *)(nand->priv);
- gpmcnand_dbg("mtd=%x mode=%x", (unsigned int)mtd, mode);
- switch (mode) {
- case NAND_ECC_READ:
- case NAND_ECC_WRITE:
- /* Clear the ecc result registers
- * select ecc reg as 1
- */
- writel(0x101, oinfo->gpmc_base + GPMC_ECC_CONTROL);
- /* Size 0 = 0xFF, Size1 is 0xFF - both are 512 bytes
- * tell all regs to generate size0 sized regs
- * we just have a single ECC engine for all CS
- */
- writel(0x3FCFF000, oinfo->gpmc_base +
- GPMC_ECC_SIZE_CONFIG);
- writel(oinfo->ecc_config, oinfo->gpmc_base +
- GPMC_ECC_CONFIG);
- break;
- default:
- gpmcnand_err("Error: Unrecognized Mode[%d]!\n", mode);
- break;
- }
-}
-#endif /* CONFIG_NAND_OMAP_GPMC_HWECC */
-
-/**
- * @brief nand device probe.
- *
- * @param pdev -matching device
- *
- * @return -failure reason or give 0
- */
-static int gpmc_nand_probe(struct device_d *pdev)
-{
- struct gpmc_nand_info *oinfo;
- struct gpmc_nand_platform_data *pdata;
- struct nand_chip *nand;
- struct mtd_info *minfo;
- unsigned long cs_base;
- int err;
-
- gpmcnand_dbg("pdev=%x", (unsigned int)pdev);
- pdata = (struct gpmc_nand_platform_data *)pdev->platform_data;
- if (pdata == NULL) {
- gpmcnand_err("platform data missing\n");
- return -ENODEV;
- }
-
- oinfo = calloc(1, sizeof(struct gpmc_nand_info));
- if (!oinfo) {
- gpmcnand_err("oinfo alloc failed!\n");
- return -ENOMEM;
- }
-
- /* fill up my data structures */
- oinfo->pdev = pdev;
- oinfo->pdata = pdata;
- pdev->platform_data = (void *)oinfo;
-
- nand = &oinfo->nand;
- nand->priv = (void *)oinfo;
-
- minfo = &oinfo->minfo;
- minfo->priv = (void *)nand;
-
- if (pdata->cs >= GPMC_NUM_CS) {
- gpmcnand_err("Invalid CS!\n");
- err = -EINVAL;
- goto out_release_mem;
- }
- /* Setup register specific data */
- oinfo->gpmc_cs = pdata->cs;
- oinfo->gpmc_base = pdev->map_base;
- cs_base = oinfo->gpmc_base + GPMC_CONFIG1_0 +
- (pdata->cs * GPMC_CONFIG_CS_SIZE);
- oinfo->gpmc_command = (void *)(cs_base + GPMC_CS_NAND_COMMAND);
- oinfo->gpmc_address = (void *)(cs_base + GPMC_CS_NAND_ADDRESS);
- oinfo->gpmc_data = (void *)(cs_base + GPMC_CS_NAND_DATA);
- oinfo->timeout = pdata->max_timeout;
- debug("GPMC Details:\n"
- "GPMC BASE=%x\n"
- "CMD=%x\n"
- "ADDRESS=%x\n"
- "DATA=%x\n"
- "CS_BASE=%x\n",
- oinfo->gpmc_base, oinfo->gpmc_command,
- oinfo->gpmc_address, oinfo->gpmc_data, cs_base);
-
- /* If we are 16 bit dev, our gpmc config tells us that */
- if ((readl(cs_base) & 0x3000) == 0x1000) {
- debug("16 bit dev\n");
- nand->options |= NAND_BUSWIDTH_16;
- }
-
- /* Same data register for in and out */
- nand->IO_ADDR_W = nand->IO_ADDR_R = (void *)oinfo->gpmc_data;
- /*
- * If RDY/BSY line is connected to OMAP then use the omap ready
- * function and the generic nand_wait function which reads the
- * status register after monitoring the RDY/BSY line. Otherwise
- * use a standard chip delay which is slightly more than tR
- * (AC Timing) of the NAND device and read the status register
- * until you get a failure or success
- */
- if (pdata->wait_mon_pin > 4) {
- gpmcnand_err("Invalid wait monitoring pin\n");
- err = -EINVAL;
- goto out_release_mem;
- }
- if (pdata->wait_mon_pin) {
- /* Set up the wait monitoring mask
- * This is GPMC_STATUS reg relevant */
- oinfo->wait_mon_mask = (0x1 << (pdata->wait_mon_pin - 1)) << 8;
- oinfo->wait_pol = (pdata->plat_options & NAND_WAITPOL_MASK);
- nand->dev_ready = omap_dev_ready;
- nand->chip_delay = 0;
- } else {
- /* use the default nand_wait function */
- nand->chip_delay = 50;
- }
-
- /* Use default cmdfunc */
- /* nand cmd control */
- nand->cmd_ctrl = omap_hwcontrol;
-
- /* Dont do a bbt scan at the start */
- nand->options |= NAND_SKIP_BBTSCAN;
-
- /* State my controller */
- nand->controller = &oinfo->controller;
-
- /* if a different placement scheme is requested */
- if (pdata->oob)
- nand->ecc.layout = pdata->oob;
-
-#ifdef CONFIG_NAND_OMAP_GPMC_HWECC
- if (pdata->plat_options & NAND_HWECC_ENABLE) {
- /* Program how many columns we expect+
- * enable the cs we want and enable the engine
- */
- oinfo->ecc_config = (pdata->cs << 1) |
- ((nand->options & NAND_BUSWIDTH_16) ?
- (0x1 << 7) : 0x0) | 0x1;
- nand->ecc.hwctl = omap_enable_hwecc;
- nand->ecc.calculate = omap_calculate_ecc;
- nand->ecc.correct = omap_correct_data;
- nand->ecc.mode = NAND_ECC_HW;
- nand->ecc.size = 512;
- nand->ecc.bytes = 3;
- nand->ecc.steps = nand->ecc.layout->eccbytes / nand->ecc.bytes;
- oinfo->ecc_parity_pairs = 12;
- } else
-#endif
- nand->ecc.mode = NAND_ECC_SOFT;
-
- /* All information is ready.. now lets call setup, if present */
- if (pdata->nand_setup) {
- err = pdata->nand_setup(pdata);
- if (err) {
- gpmcnand_err("pdataform setup failed\n");
- goto out_release_mem;
- }
- }
- /* Remove write protection */
- gpmc_nand_wp(oinfo, 0);
-
- /* we do not know what state of device we have is, so
- * Send a reset to the device
- * 8 bit write will work on 16 and 8 bit devices
- */
- writeb(NAND_CMD_RESET, oinfo->gpmc_command);
- mdelay(1);
-
- /* In normal mode, we scan to get just the device
- * presence and then to get the device geometry
- */
- if (nand_scan(minfo, 1)) {
- gpmcnand_err("device scan failed\n");
- err = -ENXIO;
- goto out_release_mem;
- }
-
- /* We are all set to register with the system now! */
- err = add_mtd_device(minfo);
- if (err) {
- gpmcnand_err("device registration failed\n");
- goto out_release_mem;
- }
- return 0;
-
-out_release_mem:
- if (oinfo)
- free(oinfo);
-
- gpmcnand_err("Failed!!\n");
- return err;
-}
-
-/** GMPC nand driver -> device registered by platforms */
-static struct driver_d gpmc_nand_driver = {
- .name = "gpmc_nand",
- .probe = gpmc_nand_probe,
-};
-
-static int gpmc_nand_init(void)
-{
- return register_driver(&gpmc_nand_driver);
-}
-
-device_initcall(gpmc_nand_init);
diff --git a/drivers/nand/nand_s3c2410.c b/drivers/nand/nand_s3c2410.c
deleted file mode 100644
index b989583..0000000
--- a/drivers/nand/nand_s3c2410.c
+++ /dev/null
@@ -1,525 +0,0 @@
-/* linux/drivers/mtd/nand/s3c2410.c
- *
- * Copyright (C) 2009 Juergen Beisert, Pengutronix
- *
- * Copyright �� 2004-2008 Simtec Electronics
- * http://armlinux.simtec.co.uk/
- * Ben Dooks <ben@simtec.co.uk>
- *
- * Samsung S3C2410 NAND driver
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*/
-
-#include <config.h>
-#include <common.h>
-#include <driver.h>
-#include <malloc.h>
-#include <init.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <mach/s3c24xx-generic.h>
-#include <mach/s3c24x0-iomap.h>
-#include <mach/s3c24x0-nand.h>
-#include <asm/io.h>
-#include <asm-generic/errno.h>
-
-#ifdef CONFIG_S3C24XX_NAND_BOOT
-# define __nand_boot_init __bare_init
-# ifndef BOARD_DEFAULT_NAND_TIMING
-# define BOARD_DEFAULT_NAND_TIMING 0x0737
-# endif
-#else
-# define __nand_boot_init
-#endif
-
-/**
- * Define this symbol for testing purpose. It will add a command to read an
- * image from the NAND like it the boot strap code will do.
- */
-#define CONFIG_NAND_S3C24XX_BOOT_DEBUG
-
-/* NAND controller's register */
-
-#define NFCONF 0x00
-
-#ifdef CONFIG_CPU_S3C2410
-
-#define NFCMD 0x04
-#define NFADDR 0x08
-#define NFDATA 0x0c
-#define NFSTAT 0x10
-#define NFECC 0x14
-
-/* S3C2410 specific bits */
-#define NFSTAT_BUSY (1)
-#define NFCONF_nFCE (1 << 11)
-#define NFCONF_INITECC (1 << 12)
-#define NFCONF_EN (1 << 15)
-
-#endif /* CONFIG_CPU_S3C2410 */
-
-#ifdef CONFIG_CPU_S3C2440
-
-#define NFCONT 0x04
-#define NFCMD 0x08
-#define NFADDR 0x0C
-#define NFDATA 0x10
-
-#define NFECC 0x1C
-#define NFSTAT 0x20
-
-/* S3C2440 specific bits */
-#define NFSTAT_BUSY (1)
-#define NFCONT_nFCE (1 << 1)
-#define NFCONF_INITECC (1 << 12)
-#define NFCONT_EN (1)
-
-#endif /* CONFIG_CPU_S3C2440 */
-
-
-struct s3c24x0_nand_host {
- struct mtd_info mtd;
- struct nand_chip nand;
- struct mtd_partition *parts;
- struct device_d *dev;
-
- unsigned long base;
-};
-
-/**
- * oob placement block for use with hardware ecc generation
- */
-static struct nand_ecclayout nand_hw_eccoob = {
- .eccbytes = 3,
- .eccpos = { 0, 1, 2},
- .oobfree = {
- {
- .offset = 8,
- .length = 8
- }
- }
-};
-
-/* - Functions shared between the boot strap code and the regular driver - */
-
-/**
- * Issue the specified command to the NAND device
- * @param[in] host Base address of the NAND controller
- * @param[in] cmd Command for NAND flash
- */
-static void __nand_boot_init send_cmd(unsigned long host, uint8_t cmd)
-{
- writeb(cmd, host + NFCMD);
-}
-
-/**
- * Issue the specified address to the NAND device
- * @param[in] host Base address of the NAND controller
- * @param[in] addr Address for the NAND flash
- */
-static void __nand_boot_init send_addr(unsigned long host, uint8_t addr)
-{
- writeb(addr, host + NFADDR);
-}
-
-/**
- * Enable the NAND flash access
- * @param[in] host Base address of the NAND controller
- */
-static void __nand_boot_init enable_cs(unsigned long host)
-{
-#ifdef CONFIG_CPU_S3C2410
- writew(readw(host + NFCONF) & ~NFCONF_nFCE, host + NFCONF);
-#endif
-#ifdef CONFIG_CPU_S3C2440
- writew(readw(host + NFCONT) & ~NFCONT_nFCE, host + NFCONT);
-#endif
-}
-
-/**
- * Disable the NAND flash access
- * @param[in] host Base address of the NAND controller
- */
-static void __nand_boot_init disable_cs(unsigned long host)
-{
-#ifdef CONFIG_CPU_S3C2410
- writew(readw(host + NFCONF) | NFCONF_nFCE, host + NFCONF);
-#endif
-#ifdef CONFIG_CPU_S3C2440
- writew(readw(host + NFCONT) | NFCONT_nFCE, host + NFCONT);
-#endif
-}
-
-/**
- * Enable the NAND flash controller
- * @param[in] host Base address of the NAND controller
- * @param[in] timing Timing to access the NAND memory
- */
-static void __nand_boot_init enable_nand_controller(unsigned long host, uint32_t timing)
-{
-#ifdef CONFIG_CPU_S3C2410
- writew(timing + NFCONF_EN + NFCONF_nFCE, host + NFCONF);
-#endif
-#ifdef CONFIG_CPU_S3C2440
- writew(NFCONT_EN + NFCONT_nFCE, host + NFCONT);
- writew(timing, host + NFCONF);
-#endif
-}
-
-/**
- * Diable the NAND flash controller
- * @param[in] host Base address of the NAND controller
- */
-static void __nand_boot_init disable_nand_controller(unsigned long host)
-{
-#ifdef CONFIG_CPU_S3C2410
- writew(NFCONF_nFCE, host + NFCONF);
-#endif
-#ifdef CONFIG_CPU_S3C2440
- writew(NFCONT_nFCE, host + NFCONT);
-#endif
-}
-
-/* ----------------------------------------------------------------------- */
-
-/**
- * Check the ECC and try to repair the data if possible
- * @param[in] mtd_info FIXME
- * @param[inout] dat Pointer to the data buffer that might contain a bit error
- * @param[in] read_ecc ECC data from the OOB space
- * @param[in] calc_ecc ECC data calculated from the data
- * @return 0 no error, 1 repaired error, -1 no way...
- *
- * @note: Alsways 512 byte of data
- */
-static int s3c2410_nand_correct_data(struct mtd_info *mtd, uint8_t *dat,
- uint8_t *read_ecc, uint8_t *calc_ecc)
-{
- unsigned int diff0, diff1, diff2;
- unsigned int bit, byte;
-
- diff0 = read_ecc[0] ^ calc_ecc[0];
- diff1 = read_ecc[1] ^ calc_ecc[1];
- diff2 = read_ecc[2] ^ calc_ecc[2];
-
- if (diff0 == 0 && diff1 == 0 && diff2 == 0)
- return 0; /* ECC is ok */
-
- /* sometimes people do not think about using the ECC, so check
- * to see if we have an 0xff,0xff,0xff read ECC and then ignore
- * the error, on the assumption that this is an un-eccd page.
- */
- if (read_ecc[0] == 0xff && read_ecc[1] == 0xff && read_ecc[2] == 0xff
- /* && info->platform->ignore_unset_ecc */)
- return 0;
-
- /* Can we correct this ECC (ie, one row and column change).
- * Note, this is similar to the 256 error code on smartmedia */
-
- if (((diff0 ^ (diff0 >> 1)) & 0x55) == 0x55 &&
- ((diff1 ^ (diff1 >> 1)) & 0x55) == 0x55 &&
- ((diff2 ^ (diff2 >> 1)) & 0x55) == 0x55) {
- /* calculate the bit position of the error */
-
- bit = ((diff2 >> 3) & 1) |
- ((diff2 >> 4) & 2) |
- ((diff2 >> 5) & 4);
-
- /* calculate the byte position of the error */
-
- byte = ((diff2 << 7) & 0x100) |
- ((diff1 << 0) & 0x80) |
- ((diff1 << 1) & 0x40) |
- ((diff1 << 2) & 0x20) |
- ((diff1 << 3) & 0x10) |
- ((diff0 >> 4) & 0x08) |
- ((diff0 >> 3) & 0x04) |
- ((diff0 >> 2) & 0x02) |
- ((diff0 >> 1) & 0x01);
-
- dat[byte] ^= (1 << bit);
- return 1;
- }
-
- /* if there is only one bit difference in the ECC, then
- * one of only a row or column parity has changed, which
- * means the error is most probably in the ECC itself */
-
- diff0 |= (diff1 << 8);
- diff0 |= (diff2 << 16);
-
- if ((diff0 & ~(1<<fls(diff0))) == 0)
- return 1;
-
- return -1;
-}
-
-static void s3c2410_nand_enable_hwecc(struct mtd_info *mtd, int mode)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct s3c24x0_nand_host *host = nand_chip->priv;
-
- writel(readl(host->base + NFCONF) | NFCONF_INITECC , host->base + NFCONF);
-}
-
-static int s3c2410_nand_calculate_ecc(struct mtd_info *mtd, const uint8_t *dat, uint8_t *ecc_code)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct s3c24x0_nand_host *host = nand_chip->priv;
-
- ecc_code[0] = readb(host->base + NFECC);
- ecc_code[1] = readb(host->base + NFECC + 1);
- ecc_code[2] = readb(host->base + NFECC + 2);
-
- return 0;
-}
-
-static void s3c24x0_nand_select_chip(struct mtd_info *mtd, int chip)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct s3c24x0_nand_host *host = nand_chip->priv;
-
- if (chip == -1)
- disable_cs(host->base);
- else
- enable_cs(host->base);
-}
-
-static int s3c24x0_nand_devready(struct mtd_info *mtd)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct s3c24x0_nand_host *host = nand_chip->priv;
-
- return readw(host->base + NFSTAT) & NFSTAT_BUSY;
-}
-
-static void s3c24x0_nand_hwcontrol(struct mtd_info *mtd, int cmd,
- unsigned int ctrl)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct s3c24x0_nand_host *host = nand_chip->priv;
-
- if (cmd == NAND_CMD_NONE)
- return;
- /*
- * If the CLE should be active, this call is a NAND command
- */
- if (ctrl & NAND_CLE)
- send_cmd(host->base, cmd);
- /*
- * If the ALE should be active, this call is a NAND address
- */
- if (ctrl & NAND_ALE)
- send_addr(host->base, cmd);
-}
-
-static int s3c24x0_nand_inithw(struct s3c24x0_nand_host *host)
-{
- struct s3c24x0_nand_platform_data *pdata = host->dev->platform_data;
- uint32_t tmp;
-
- /* reset the NAND controller */
- disable_nand_controller(host->base);
-
- if (pdata != NULL)
- tmp = pdata->nand_timing;
- else
- /* else slowest possible timing */
- tmp = CALC_NFCONF_TIMING(4, 8, 8);
-
- /* reenable the NAND controller */
- enable_nand_controller(host->base, tmp);
-
- return 0;
-}
-
-static int s3c24x0_nand_probe(struct device_d *dev)
-{
- struct nand_chip *chip;
- struct mtd_info *mtd;
- struct s3c24x0_nand_host *host;
- int ret;
-
- /* Allocate memory for MTD device structure and private data */
- host = kzalloc(sizeof(struct s3c24x0_nand_host), GFP_KERNEL);
- if (!host)
- return -ENOMEM;
-
- host->dev = dev;
- host->base = dev->map_base;
-
- /* structures must be linked */
- chip = &host->nand;
- mtd = &host->mtd;
- mtd->priv = chip;
-
- /* init the default settings */
-#if 0
- /* TODO: Will follow later */
- init_nand_chip_bw8(chip);
-#endif
- /* 50 us command delay time */
- chip->chip_delay = 50;
- chip->priv = host;
-
- chip->IO_ADDR_R = chip->IO_ADDR_W = (void*)(dev->map_base + NFDATA);
-
- chip->cmd_ctrl = s3c24x0_nand_hwcontrol;
- chip->dev_ready = s3c24x0_nand_devready;
- chip->select_chip = s3c24x0_nand_select_chip;
-
- /* we are using the hardware ECC feature of this device */
- chip->ecc.calculate = s3c2410_nand_calculate_ecc;
- chip->ecc.correct = s3c2410_nand_correct_data;
- chip->ecc.hwctl = s3c2410_nand_enable_hwecc;
- chip->ecc.calculate = s3c2410_nand_calculate_ecc;
-
- /* our hardware capabilities */
- chip->ecc.mode = NAND_ECC_HW;
- chip->ecc.size = 512;
- chip->ecc.bytes = 3;
- chip->ecc.layout = &nand_hw_eccoob;
-
- ret = s3c24x0_nand_inithw(host);
- if (ret != 0)
- goto on_error;
-
- /* Scan to find existence of the device */
- ret = nand_scan(mtd, 1);
- if (ret != 0) {
- ret = -ENXIO;
- goto on_error;
- }
-
- return add_mtd_device(mtd);
-
-on_error:
- free(host);
- return ret;
-}
-
-static struct driver_d s3c24x0_nand_driver = {
- .name = "s3c24x0_nand",
- .probe = s3c24x0_nand_probe,
-};
-
-#ifdef CONFIG_S3C24XX_NAND_BOOT
-
-static void __nand_boot_init wait_for_completion(unsigned long host)
-{
- while (!(readw(host + NFSTAT) & NFSTAT_BUSY))
- ;
-}
-
-static void __nand_boot_init nfc_addr(unsigned long host, uint32_t offs)
-{
- send_addr(host, offs & 0xff);
- send_addr(host, (offs >> 9) & 0xff);
- send_addr(host, (offs >> 17) & 0xff);
- send_addr(host, (offs >> 25) & 0xff);
-}
-
-/**
- * Load a sequential count of blocks from the NAND into memory
- * @param[out] dest Pointer to target area (in SDRAM)
- * @param[in] size Bytes to read from NAND device
- * @param[in] page Start page to read from
- * @param[in] pagesize Size of each page in the NAND
- *
- * This function must be located in the first 4kiB of the barebox image
- * (guess why). When this routine is running the SDRAM is up and running
- * and it runs from the correct address (physical=linked address).
- * TODO Could we access the platform data from the boardfile?
- * Due to it makes no sense this function does not return in case of failure.
- */
-void __nand_boot_init s3c24x0_nand_load_image(void *dest, int size, int page, int pagesize)
-{
- unsigned long host = S3C24X0_NAND_BASE;
- int i;
-
- /*
- * Reenable the NFC and use the default (but slow) access
- * timing or the board specific setting if provided.
- */
- enable_nand_controller(host, BOARD_DEFAULT_NAND_TIMING);
- enable_cs(host);
-
- /* Reset the NAND device */
- send_cmd(host, NAND_CMD_RESET);
- wait_for_completion(host);
- disable_cs(host);
-
- do {
- enable_cs(host);
- send_cmd(host, NAND_CMD_READ0);
- nfc_addr(host, page * pagesize);
- wait_for_completion(host);
- /* copy one page (do *not* use readsb() here!)*/
- for (i = 0; i < pagesize; i++)
- writeb(readb(host + NFDATA), (unsigned long)(dest + i));
- disable_cs(host);
-
- page++;
- dest += pagesize;
- size -= pagesize;
- } while (size >= 0);
-
- /* disable the controller again */
- disable_nand_controller(host);
-}
-
-#ifdef CONFIG_NAND_S3C24XX_BOOT_DEBUG
-#include <command.h>
-
-static int do_nand_boot_test(struct command *cmdtp, int argc, char *argv[])
-{
- void *dest;
- int size, pagesize;
-
- if (argc < 3)
- return COMMAND_ERROR_USAGE;
-
- dest = (void *)strtoul_suffix(argv[1], NULL, 0);
- size = strtoul_suffix(argv[2], NULL, 0);
- pagesize = strtoul_suffix(argv[3], NULL, 0);
-
- s3c24x0_nand_load_image(dest, size, 0, pagesize);
-
- return 0;
-}
-
-static const __maybe_unused char cmd_nand_boot_test_help[] =
-"Usage: nand_boot_test <dest> <size> <pagesize>\n";
-
-BAREBOX_CMD_START(nand_boot_test)
- .cmd = do_nand_boot_test,
- .usage = "load an image from NAND",
- BAREBOX_CMD_HELP(cmd_nand_boot_test_help)
-BAREBOX_CMD_END
-#endif
-
-#endif /* CONFIG_S3C24XX_NAND_BOOT */
-
-/*
- * Main initialization routine
- * @return 0 if successful; non-zero otherwise
- */
-static int __init s3c24x0_nand_init(void)
-{
- return register_driver(&s3c24x0_nand_driver);
-}
-
-device_initcall(s3c24x0_nand_init);
diff --git a/drivers/nand/nand_util.c b/drivers/nand/nand_util.c
deleted file mode 100644
index d57294e..0000000
--- a/drivers/nand/nand_util.c
+++ /dev/null
@@ -1,858 +0,0 @@
-/*
- * drivers/nand/nand_util.c
- *
- * Copyright (C) 2006 by Weiss-Electronic GmbH.
- * All rights reserved.
- *
- * @author: Guido Classen <clagix@gmail.com>
- * @descr: NAND Flash support
- * @references: borrowed heavily from Linux mtd-utils code:
- * flash_eraseall.c by Arcom Control System Ltd
- * nandwrite.c by Steven J. Hill (sjhill@realitydiluted.com)
- * and Thomas Gleixner (tglx@linutronix.de)
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
- */
-
-#include <common.h>
-#include <command.h>
-#include <watchdog.h>
-#include <malloc.h>
-
-#include <nand.h>
-//#include <jffs2/jffs2.h>
-
-typedef struct erase_info erase_info_t;
-typedef struct mtd_info mtd_info_t;
-
-/* support only for native endian JFFS2 */
-#define cpu_to_je16(x) (x)
-#define cpu_to_je32(x) (x)
-
-/*****************************************************************************/
-static int nand_block_bad_scrub(struct mtd_info *mtd, loff_t ofs, int getchip)
-{
- return 0;
-}
-
-/**
- * nand_erase_opts: - erase NAND flash with support for various options
- * (jffs2 formating)
- *
- * @param meminfo NAND device to erase
- * @param opts options, @see struct nand_erase_options
- * @return 0 in case of success
- *
- * This code is ported from flash_eraseall.c from Linux mtd utils by
- * Arcom Control System Ltd.
- */
-int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts)
-{
- struct jffs2_unknown_node cleanmarker;
- int clmpos = 0;
- int clmlen = 8;
- erase_info_t erase;
- ulong erase_length;
- int isNAND;
- int bbtest = 1;
- int result;
- int percent_complete = -1;
- int (*nand_block_bad_old)(struct mtd_info *, loff_t, int) = NULL;
- const char *mtd_device = meminfo->name;
-
- memset(&erase, 0, sizeof(erase));
-
- erase.mtd = meminfo;
- erase.len = meminfo->erasesize;
- erase.addr = opts->offset;
- erase_length = opts->length;
-
- isNAND = meminfo->type == MTD_NANDFLASH ? 1 : 0;
-
- if (opts->jffs2) {
- cleanmarker.magic = cpu_to_je16 (JFFS2_MAGIC_BITMASK);
- cleanmarker.nodetype = cpu_to_je16 (JFFS2_NODETYPE_CLEANMARKER);
- if (isNAND) {
- struct nand_oobinfo *oobinfo = &meminfo->oobinfo;
-
- /* check for autoplacement */
- if (oobinfo->useecc == MTD_NANDECC_AUTOPLACE) {
- /* get the position of the free bytes */
- if (!oobinfo->oobfree[0][1]) {
- printf(" Eeep. Autoplacement selected "
- "and no empty space in oob\n");
- return -1;
- }
- clmpos = oobinfo->oobfree[0][0];
- clmlen = oobinfo->oobfree[0][1];
- if (clmlen > 8)
- clmlen = 8;
- } else {
- /* legacy mode */
- switch (meminfo->oobsize) {
- case 8:
- clmpos = 6;
- clmlen = 2;
- break;
- case 16:
- clmpos = 8;
- clmlen = 8;
- break;
- case 64:
- clmpos = 16;
- clmlen = 8;
- break;
- }
- }
-
- cleanmarker.totlen = cpu_to_je32(8);
- } else {
- cleanmarker.totlen =
- cpu_to_je32(sizeof(struct jffs2_unknown_node));
- }
- cleanmarker.hdr_crc = cpu_to_je32(
- crc32_no_comp(0, (unsigned char *) &cleanmarker,
- sizeof(struct jffs2_unknown_node) - 4));
- }
-
- /* scrub option allows to erase badblock. To prevent internal
- * check from erase() method, set block check method to dummy
- * and disable bad block table while erasing.
- */
- if (opts->scrub) {
- struct nand_chip *priv_nand = meminfo->priv;
-
- nand_block_bad_old = priv_nand->block_bad;
- priv_nand->block_bad = nand_block_bad_scrub;
- /* we don't need the bad block table anymore...
- * after scrub, there are no bad blocks left!
- */
- if (priv_nand->bbt) {
- kfree(priv_nand->bbt);
- }
- priv_nand->bbt = NULL;
- }
-
- for (;
- erase.addr < opts->offset + erase_length;
- erase.addr += meminfo->erasesize) {
-
- WATCHDOG_RESET ();
-
- if (!opts->scrub && bbtest) {
- int ret = meminfo->block_isbad(meminfo, erase.addr);
- if (ret > 0) {
- if (!opts->quiet)
- printf("\rSkipping bad block at "
- "0x%08x "
- " \n",
- erase.addr);
- continue;
-
- } else if (ret < 0) {
- printf("\n%s: MTD get bad block failed: %d\n",
- mtd_device,
- ret);
- return -1;
- }
- }
-
- result = meminfo->erase(meminfo, &erase);
- if (result != 0) {
- printf("\n%s: MTD Erase failure: %d\n",
- mtd_device, result);
- continue;
- }
-
- /* format for JFFS2 ? */
- if (opts->jffs2) {
-
- /* write cleanmarker */
- if (isNAND) {
- size_t written;
- result = meminfo->write_oob(meminfo,
- erase.addr + clmpos,
- clmlen,
- &written,
- (unsigned char *)
- &cleanmarker);
- if (result != 0) {
- printf("\n%s: MTD writeoob failure: %d\n",
- mtd_device, result);
- continue;
- }
- } else {
- printf("\n%s: this erase routine only supports"
- " NAND devices!\n",
- mtd_device);
- }
- }
-
- if (!opts->quiet) {
- int percent = (int)
- ((unsigned long long)
- (erase.addr+meminfo->erasesize-opts->offset)
- * 100 / erase_length);
-
- /* output progress message only at whole percent
- * steps to reduce the number of messages printed
- * on (slow) serial consoles
- */
- if (percent != percent_complete) {
- percent_complete = percent;
-
- printf("\rErasing at 0x%x -- %3d%% complete.",
- erase.addr, percent);
-
- if (opts->jffs2 && result == 0)
- printf(" Cleanmarker written at 0x%x.",
- erase.addr);
- }
- }
- }
- if (!opts->quiet)
- printf("\n");
-
- if (nand_block_bad_old) {
- struct nand_chip *priv_nand = meminfo->priv;
-
- priv_nand->block_bad = nand_block_bad_old;
- priv_nand->scan_bbt(meminfo);
- }
-
- return 0;
-}
-
-#define MAX_PAGE_SIZE 2048
-#define MAX_OOB_SIZE 64
-
-/*
- * buffer array used for writing data
- */
-static unsigned char data_buf[MAX_PAGE_SIZE];
-static unsigned char oob_buf[MAX_OOB_SIZE];
-
-/* OOB layouts to pass into the kernel as default */
-static struct nand_oobinfo none_oobinfo = {
- .useecc = MTD_NANDECC_OFF,
-};
-
-static struct nand_oobinfo jffs2_oobinfo = {
- .useecc = MTD_NANDECC_PLACE,
- .eccbytes = 6,
- .eccpos = { 0, 1, 2, 3, 6, 7 }
-};
-
-static struct nand_oobinfo yaffs_oobinfo = {
- .useecc = MTD_NANDECC_PLACE,
- .eccbytes = 6,
- .eccpos = { 8, 9, 10, 13, 14, 15}
-};
-
-static struct nand_oobinfo autoplace_oobinfo = {
- .useecc = MTD_NANDECC_AUTOPLACE
-};
-
-/**
- * nand_write_opts: - write image to NAND flash with support for various options
- *
- * @param meminfo NAND device to erase
- * @param opts write options (@see nand_write_options)
- * @return 0 in case of success
- *
- * This code is ported from nandwrite.c from Linux mtd utils by
- * Steven J. Hill and Thomas Gleixner.
- */
-int nand_write_opts(nand_info_t *meminfo, const nand_write_options_t *opts)
-{
- int imglen = 0;
- int pagelen;
- int baderaseblock;
- int blockstart = -1;
- loff_t offs;
- int readlen;
- int oobinfochanged = 0;
- int percent_complete = -1;
- struct nand_oobinfo old_oobinfo;
- ulong mtdoffset = opts->offset;
- ulong erasesize_blockalign;
- u_char *buffer = opts->buffer;
- size_t written;
- int result;
-
- if (opts->pad && opts->writeoob) {
- printf("Can't pad when oob data is present.\n");
- return -1;
- }
-
- /* set erasesize to specified number of blocks - to match
- * jffs2 (virtual) block size */
- if (opts->blockalign == 0) {
- erasesize_blockalign = meminfo->erasesize;
- } else {
- erasesize_blockalign = meminfo->erasesize * opts->blockalign;
- }
-
- /* make sure device page sizes are valid */
- if (!(meminfo->oobsize == 16 && meminfo->oobblock == 512)
- && !(meminfo->oobsize == 8 && meminfo->oobblock == 256)
- && !(meminfo->oobsize == 64 && meminfo->oobblock == 2048)) {
- printf("Unknown flash (not normal NAND)\n");
- return -1;
- }
-
- /* read the current oob info */
- memcpy(&old_oobinfo, &meminfo->oobinfo, sizeof(old_oobinfo));
-
- /* write without ecc? */
- if (opts->noecc) {
- memcpy(&meminfo->oobinfo, &none_oobinfo,
- sizeof(meminfo->oobinfo));
- oobinfochanged = 1;
- }
-
- /* autoplace ECC? */
- if (opts->autoplace && (old_oobinfo.useecc != MTD_NANDECC_AUTOPLACE)) {
-
- memcpy(&meminfo->oobinfo, &autoplace_oobinfo,
- sizeof(meminfo->oobinfo));
- oobinfochanged = 1;
- }
-
- /* force OOB layout for jffs2 or yaffs? */
- if (opts->forcejffs2 || opts->forceyaffs) {
- struct nand_oobinfo *oobsel =
- opts->forcejffs2 ? &jffs2_oobinfo : &yaffs_oobinfo;
-
- if (meminfo->oobsize == 8) {
- if (opts->forceyaffs) {
- printf("YAFSS cannot operate on "
- "256 Byte page size\n");
- goto restoreoob;
- }
- /* Adjust number of ecc bytes */
- jffs2_oobinfo.eccbytes = 3;
- }
-
- memcpy(&meminfo->oobinfo, oobsel, sizeof(meminfo->oobinfo));
- }
-
- /* get image length */
- imglen = opts->length;
- pagelen = meminfo->oobblock
- + ((opts->writeoob != 0) ? meminfo->oobsize : 0);
-
- /* check, if file is pagealigned */
- if ((!opts->pad) && ((imglen % pagelen) != 0)) {
- printf("Input block length is not page aligned\n");
- goto restoreoob;
- }
-
- /* check, if length fits into device */
- if (((imglen / pagelen) * meminfo->oobblock)
- > (meminfo->size - opts->offset)) {
- printf("Image %d bytes, NAND page %d bytes, "
- "OOB area %u bytes, device size %u bytes\n",
- imglen, pagelen, meminfo->oobblock, meminfo->size);
- printf("Input block does not fit into device\n");
- goto restoreoob;
- }
-
- if (!opts->quiet)
- printf("\n");
-
- /* get data from input and write to the device */
- while (imglen && (mtdoffset < meminfo->size)) {
-
- WATCHDOG_RESET ();
-
- /*
- * new eraseblock, check for bad block(s). Stay in the
- * loop to be sure if the offset changes because of
- * a bad block, that the next block that will be
- * written to is also checked. Thus avoiding errors if
- * the block(s) after the skipped block(s) is also bad
- * (number of blocks depending on the blockalign
- */
- while (blockstart != (mtdoffset & (~erasesize_blockalign+1))) {
- blockstart = mtdoffset & (~erasesize_blockalign+1);
- offs = blockstart;
- baderaseblock = 0;
-
- /* check all the blocks in an erase block for
- * bad blocks */
- do {
- int ret = meminfo->block_isbad(meminfo, offs);
-
- if (ret < 0) {
- printf("Bad block check failed\n");
- goto restoreoob;
- }
- if (ret == 1) {
- baderaseblock = 1;
- if (!opts->quiet)
- printf("\rBad block at 0x%lx "
- "in erase block from "
- "0x%x will be skipped\n",
- (long) offs,
- blockstart);
- }
-
- if (baderaseblock) {
- mtdoffset = blockstart
- + erasesize_blockalign;
- }
- offs += erasesize_blockalign
- / opts->blockalign;
- } while (offs < blockstart + erasesize_blockalign);
- }
-
- readlen = meminfo->oobblock;
- if (opts->pad && (imglen < readlen)) {
- readlen = imglen;
- memset(data_buf + readlen, 0xff,
- meminfo->oobblock - readlen);
- }
-
- /* read page data from input memory buffer */
- memcpy(data_buf, buffer, readlen);
- buffer += readlen;
-
- if (opts->writeoob) {
- /* read OOB data from input memory block, exit
- * on failure */
- memcpy(oob_buf, buffer, meminfo->oobsize);
- buffer += meminfo->oobsize;
-
- /* write OOB data first, as ecc will be placed
- * in there*/
- result = meminfo->write_oob(meminfo,
- mtdoffset,
- meminfo->oobsize,
- &written,
- (unsigned char *)
- &oob_buf);
-
- if (result != 0) {
- printf("\nMTD writeoob failure: %d\n",
- result);
- goto restoreoob;
- }
- imglen -= meminfo->oobsize;
- }
-
- /* write out the page data */
- result = meminfo->write(meminfo,
- mtdoffset,
- meminfo->oobblock,
- &written,
- (unsigned char *) &data_buf);
-
- if (result != 0) {
- printf("writing NAND page at offset 0x%lx failed\n",
- mtdoffset);
- goto restoreoob;
- }
- imglen -= readlen;
-
- if (!opts->quiet) {
- int percent = (int)
- ((unsigned long long)
- (opts->length-imglen) * 100
- / opts->length);
- /* output progress message only at whole percent
- * steps to reduce the number of messages printed
- * on (slow) serial consoles
- */
- if (percent != percent_complete) {
- printf("\rWriting data at 0x%x "
- "-- %3d%% complete.",
- mtdoffset, percent);
- percent_complete = percent;
- }
- }
-
- mtdoffset += meminfo->oobblock;
- }
-
- if (!opts->quiet)
- printf("\n");
-
-restoreoob:
- if (oobinfochanged) {
- memcpy(&meminfo->oobinfo, &old_oobinfo,
- sizeof(meminfo->oobinfo));
- }
-
- if (imglen > 0) {
- printf("Data did not fit into device, due to bad blocks\n");
- return -1;
- }
-
- /* return happy */
- return 0;
-}
-
-/**
- * nand_read_opts: - read image from NAND flash with support for various options
- *
- * @param meminfo NAND device to erase
- * @param opts read options (@see struct nand_read_options)
- * @return 0 in case of success
- *
- */
-int nand_read_opts(nand_info_t *meminfo, const nand_read_options_t *opts)
-{
- int imglen = opts->length;
- int pagelen;
- int baderaseblock;
- int blockstart = -1;
- int percent_complete = -1;
- loff_t offs;
- size_t readlen;
- ulong mtdoffset = opts->offset;
- u_char *buffer = opts->buffer;
- int result;
-
- /* make sure device page sizes are valid */
- if (!(meminfo->oobsize == 16 && meminfo->oobblock == 512)
- && !(meminfo->oobsize == 8 && meminfo->oobblock == 256)
- && !(meminfo->oobsize == 64 && meminfo->oobblock == 2048)) {
- printf("Unknown flash (not normal NAND)\n");
- return -1;
- }
-
- pagelen = meminfo->oobblock
- + ((opts->readoob != 0) ? meminfo->oobsize : 0);
-
- /* check, if length is not larger than device */
- if (((imglen / pagelen) * meminfo->oobblock)
- > (meminfo->size - opts->offset)) {
- printf("Image %d bytes, NAND page %d bytes, "
- "OOB area %u bytes, device size %u bytes\n",
- imglen, pagelen, meminfo->oobblock, meminfo->size);
- printf("Input block is larger than device\n");
- return -1;
- }
-
- if (!opts->quiet)
- printf("\n");
-
- /* get data from input and write to the device */
- while (imglen && (mtdoffset < meminfo->size)) {
-
- WATCHDOG_RESET ();
-
- /*
- * new eraseblock, check for bad block(s). Stay in the
- * loop to be sure if the offset changes because of
- * a bad block, that the next block that will be
- * written to is also checked. Thus avoiding errors if
- * the block(s) after the skipped block(s) is also bad
- * (number of blocks depending on the blockalign
- */
- while (blockstart != (mtdoffset & (~meminfo->erasesize+1))) {
- blockstart = mtdoffset & (~meminfo->erasesize+1);
- offs = blockstart;
- baderaseblock = 0;
-
- /* check all the blocks in an erase block for
- * bad blocks */
- do {
- int ret = meminfo->block_isbad(meminfo, offs);
-
- if (ret < 0) {
- printf("Bad block check failed\n");
- return -1;
- }
- if (ret == 1) {
- baderaseblock = 1;
- if (!opts->quiet)
- printf("\rBad block at 0x%lx "
- "in erase block from "
- "0x%x will be skipped\n",
- (long) offs,
- blockstart);
- }
-
- if (baderaseblock) {
- mtdoffset = blockstart
- + meminfo->erasesize;
- }
- offs += meminfo->erasesize;
-
- } while (offs < blockstart + meminfo->erasesize);
- }
-
-
- /* read page data to memory buffer */
- result = meminfo->read(meminfo,
- mtdoffset,
- meminfo->oobblock,
- &readlen,
- (unsigned char *) &data_buf);
-
- if (result != 0) {
- printf("reading NAND page at offset 0x%lx failed\n",
- mtdoffset);
- return -1;
- }
-
- if (imglen < readlen) {
- readlen = imglen;
- }
-
- memcpy(buffer, data_buf, readlen);
- buffer += readlen;
- imglen -= readlen;
-
- if (opts->readoob) {
- result = meminfo->read_oob(meminfo,
- mtdoffset,
- meminfo->oobsize,
- &readlen,
- (unsigned char *)
- &oob_buf);
-
- if (result != 0) {
- printf("\nMTD readoob failure: %d\n",
- result);
- return -1;
- }
-
-
- if (imglen < readlen) {
- readlen = imglen;
- }
-
- memcpy(buffer, oob_buf, readlen);
-
- buffer += readlen;
- imglen -= readlen;
- }
-
- if (!opts->quiet) {
- int percent = (int)
- ((unsigned long long)
- (opts->length-imglen) * 100
- / opts->length);
- /* output progress message only at whole percent
- * steps to reduce the number of messages printed
- * on (slow) serial consoles
- */
- if (percent != percent_complete) {
- if (!opts->quiet)
- printf("\rReading data from 0x%x "
- "-- %3d%% complete.",
- mtdoffset, percent);
- percent_complete = percent;
- }
- }
-
- mtdoffset += meminfo->oobblock;
- }
-
- if (!opts->quiet)
- printf("\n");
-
- if (imglen > 0) {
- printf("Could not read entire image due to bad blocks\n");
- return -1;
- }
-
- /* return happy */
- return 0;
-}
-
-/******************************************************************************
- * Support for locking / unlocking operations of some NAND devices
- *****************************************************************************/
-
-#define NAND_CMD_LOCK 0x2a
-#define NAND_CMD_LOCK_TIGHT 0x2c
-#define NAND_CMD_UNLOCK1 0x23
-#define NAND_CMD_UNLOCK2 0x24
-#define NAND_CMD_LOCK_STATUS 0x7a
-
-/**
- * nand_lock: Set all pages of NAND flash chip to the LOCK or LOCK-TIGHT
- * state
- *
- * @param meminfo nand mtd instance
- * @param tight bring device in lock tight mode
- *
- * @return 0 on success, -1 in case of error
- *
- * The lock / lock-tight command only applies to the whole chip. To get some
- * parts of the chip lock and others unlocked use the following sequence:
- *
- * - Lock all pages of the chip using nand_lock(mtd, 0) (or the lockpre pin)
- * - Call nand_unlock() once for each consecutive area to be unlocked
- * - If desired: Bring the chip to the lock-tight state using nand_lock(mtd, 1)
- *
- * If the device is in lock-tight state software can't change the
- * current active lock/unlock state of all pages. nand_lock() / nand_unlock()
- * calls will fail. It is only posible to leave lock-tight state by
- * an hardware signal (low pulse on _WP pin) or by power down.
- */
-int nand_lock(nand_info_t *meminfo, int tight)
-{
- int ret = 0;
- int status;
- struct nand_chip *this = meminfo->priv;
-
- /* select the NAND device */
- this->select_chip(meminfo, 0);
-
- this->cmdfunc(meminfo,
- (tight ? NAND_CMD_LOCK_TIGHT : NAND_CMD_LOCK),
- -1, -1);
-
- /* call wait ready function */
- status = this->waitfunc(meminfo, this, FL_WRITING);
-
- /* see if device thinks it succeeded */
- if (status & 0x01) {
- ret = -1;
- }
-
- /* de-select the NAND device */
- this->select_chip(meminfo, -1);
- return ret;
-}
-
-/**
- * nand_get_lock_status: - query current lock state from one page of NAND
- * flash
- *
- * @param meminfo nand mtd instance
- * @param offset page address to query (muss be page aligned!)
- *
- * @return -1 in case of error
- * >0 lock status:
- * bitfield with the following combinations:
- * NAND_LOCK_STATUS_TIGHT: page in tight state
- * NAND_LOCK_STATUS_LOCK: page locked
- * NAND_LOCK_STATUS_UNLOCK: page unlocked
- *
- */
-int nand_get_lock_status(nand_info_t *meminfo, ulong offset)
-{
- int ret = 0;
- int chipnr;
- int page;
- struct nand_chip *this = meminfo->priv;
-
- /* select the NAND device */
- chipnr = (int)(offset >> this->chip_shift);
- this->select_chip(meminfo, chipnr);
-
-
- if ((offset & (meminfo->oobblock - 1)) != 0) {
- printf ("nand_get_lock_status: "
- "Start address must be beginning of "
- "nand page!\n");
- ret = -1;
- goto out;
- }
-
- /* check the Lock Status */
- page = (int)(offset >> this->page_shift);
- this->cmdfunc(meminfo, NAND_CMD_LOCK_STATUS, -1, page & this->pagemask);
-
- ret = this->read_byte(meminfo) & (NAND_LOCK_STATUS_TIGHT
- | NAND_LOCK_STATUS_LOCK
- | NAND_LOCK_STATUS_UNLOCK);
-
- out:
- /* de-select the NAND device */
- this->select_chip(meminfo, -1);
- return ret;
-}
-
-/**
- * nand_unlock: - Unlock area of NAND pages
- * only one consecutive area can be unlocked at one time!
- *
- * @param meminfo nand mtd instance
- * @param start start byte address
- * @param length number of bytes to unlock (must be a multiple of
- * page size nand->oobblock)
- *
- * @return 0 on success, -1 in case of error
- */
-int nand_unlock(nand_info_t *meminfo, ulong start, ulong length)
-{
- int ret = 0;
- int chipnr;
- int status;
- int page;
- struct nand_chip *this = meminfo->priv;
- printf ("nand_unlock: start: %08x, length: %d!\n",
- (int)start, (int)length);
-
- /* select the NAND device */
- chipnr = (int)(start >> this->chip_shift);
- this->select_chip(meminfo, chipnr);
-
- /* check the WP bit */
- this->cmdfunc(meminfo, NAND_CMD_STATUS, -1, -1);
- if ((this->read_byte(meminfo) & 0x80) == 0) {
- printf ("nand_unlock: Device is write protected!\n");
- ret = -1;
- goto out;
- }
-
- if ((start & (meminfo->oobblock - 1)) != 0) {
- printf ("nand_unlock: Start address must be beginning of "
- "nand page!\n");
- ret = -1;
- goto out;
- }
-
- if (length == 0 || (length & (meminfo->oobblock - 1)) != 0) {
- printf ("nand_unlock: Length must be a multiple of nand page "
- "size!\n");
- ret = -1;
- goto out;
- }
-
- /* submit address of first page to unlock */
- page = (int)(start >> this->page_shift);
- this->cmdfunc(meminfo, NAND_CMD_UNLOCK1, -1, page & this->pagemask);
-
- /* submit ADDRESS of LAST page to unlock */
- page += (int)(length >> this->page_shift) - 1;
- this->cmdfunc(meminfo, NAND_CMD_UNLOCK2, -1, page & this->pagemask);
-
- /* call wait ready function */
- status = this->waitfunc(meminfo, this, FL_WRITING);
- /* see if device thinks it succeeded */
- if (status & 0x01) {
- /* there was an error */
- ret = -1;
- goto out;
- }
-
- out:
- /* de-select the NAND device */
- this->select_chip(meminfo, -1);
- return ret;
-}
-
--
1.7.1
[-- Attachment #2: Type: text/plain, Size: 149 bytes --]
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^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 03/12] add rbtree support (needed for ubi)
2010-07-05 13:16 UBI support Sascha Hauer
2010-07-05 13:16 ` [PATCH 01/12] crc32: activate crc32_no_comp (needed for jffs2 and UBI) Sascha Hauer
2010-07-05 13:16 ` [PATCH 02/12] move drivers/nand to drivers/mtd/nand Sascha Hauer
@ 2010-07-05 13:16 ` Sascha Hauer
2010-07-05 13:16 ` [PATCH 04/12] add partition mtd support Sascha Hauer
` (10 subsequent siblings)
13 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
include/linux/rbtree.h | 160 ++++++++++++++++++++
lib/Makefile | 1 +
lib/rbtree.c | 389 ++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 550 insertions(+), 0 deletions(-)
create mode 100644 include/linux/rbtree.h
create mode 100644 lib/rbtree.c
diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h
new file mode 100644
index 0000000..6ff28e0
--- /dev/null
+++ b/include/linux/rbtree.h
@@ -0,0 +1,160 @@
+/*
+ Red Black Trees
+ (C) 1999 Andrea Arcangeli <andrea@suse.de>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ linux/include/linux/rbtree.h
+
+ To use rbtrees you'll have to implement your own insert and search cores.
+ This will avoid us to use callbacks and to drop drammatically performances.
+ I know it's not the cleaner way, but in C (not in C++) to get
+ performances and genericity...
+
+ Some example of insert and search follows here. The search is a plain
+ normal search over an ordered tree. The insert instead must be implemented
+ int two steps: as first thing the code must insert the element in
+ order as a red leaf in the tree, then the support library function
+ rb_insert_color() must be called. Such function will do the
+ not trivial work to rebalance the rbtree if necessary.
+
+-----------------------------------------------------------------------
+static inline struct page * rb_search_page_cache(struct inode * inode,
+ unsigned long offset)
+{
+ struct rb_node * n = inode->i_rb_page_cache.rb_node;
+ struct page * page;
+
+ while (n)
+ {
+ page = rb_entry(n, struct page, rb_page_cache);
+
+ if (offset < page->offset)
+ n = n->rb_left;
+ else if (offset > page->offset)
+ n = n->rb_right;
+ else
+ return page;
+ }
+ return NULL;
+}
+
+static inline struct page * __rb_insert_page_cache(struct inode * inode,
+ unsigned long offset,
+ struct rb_node * node)
+{
+ struct rb_node ** p = &inode->i_rb_page_cache.rb_node;
+ struct rb_node * parent = NULL;
+ struct page * page;
+
+ while (*p)
+ {
+ parent = *p;
+ page = rb_entry(parent, struct page, rb_page_cache);
+
+ if (offset < page->offset)
+ p = &(*p)->rb_left;
+ else if (offset > page->offset)
+ p = &(*p)->rb_right;
+ else
+ return page;
+ }
+
+ rb_link_node(node, parent, p);
+
+ return NULL;
+}
+
+static inline struct page * rb_insert_page_cache(struct inode * inode,
+ unsigned long offset,
+ struct rb_node * node)
+{
+ struct page * ret;
+ if ((ret = __rb_insert_page_cache(inode, offset, node)))
+ goto out;
+ rb_insert_color(node, &inode->i_rb_page_cache);
+ out:
+ return ret;
+}
+-----------------------------------------------------------------------
+*/
+
+#ifndef _LINUX_RBTREE_H
+#define _LINUX_RBTREE_H
+
+#include <linux/stddef.h>
+
+struct rb_node
+{
+ unsigned long rb_parent_color;
+#define RB_RED 0
+#define RB_BLACK 1
+ struct rb_node *rb_right;
+ struct rb_node *rb_left;
+} __attribute__((aligned(sizeof(long))));
+ /* The alignment might seem pointless, but allegedly CRIS needs it */
+
+struct rb_root
+{
+ struct rb_node *rb_node;
+};
+
+
+#define rb_parent(r) ((struct rb_node *)((r)->rb_parent_color & ~3))
+#define rb_color(r) ((r)->rb_parent_color & 1)
+#define rb_is_red(r) (!rb_color(r))
+#define rb_is_black(r) rb_color(r)
+#define rb_set_red(r) do { (r)->rb_parent_color &= ~1; } while (0)
+#define rb_set_black(r) do { (r)->rb_parent_color |= 1; } while (0)
+
+static inline void rb_set_parent(struct rb_node *rb, struct rb_node *p)
+{
+ rb->rb_parent_color = (rb->rb_parent_color & 3) | (unsigned long)p;
+}
+static inline void rb_set_color(struct rb_node *rb, int color)
+{
+ rb->rb_parent_color = (rb->rb_parent_color & ~1) | color;
+}
+
+#define RB_ROOT (struct rb_root) { NULL, }
+#define rb_entry(ptr, type, member) container_of(ptr, type, member)
+
+#define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL)
+#define RB_EMPTY_NODE(node) (rb_parent(node) == node)
+#define RB_CLEAR_NODE(node) (rb_set_parent(node, node))
+
+extern void rb_insert_color(struct rb_node *, struct rb_root *);
+extern void rb_erase(struct rb_node *, struct rb_root *);
+
+/* Find logical next and previous nodes in a tree */
+extern struct rb_node *rb_next(struct rb_node *);
+extern struct rb_node *rb_prev(struct rb_node *);
+extern struct rb_node *rb_first(struct rb_root *);
+extern struct rb_node *rb_last(struct rb_root *);
+
+/* Fast replacement of a single node without remove/rebalance/add/rebalance */
+extern void rb_replace_node(struct rb_node *victim, struct rb_node *new,
+ struct rb_root *root);
+
+static inline void rb_link_node(struct rb_node * node, struct rb_node * parent,
+ struct rb_node ** rb_link)
+{
+ node->rb_parent_color = (unsigned long )parent;
+ node->rb_left = node->rb_right = NULL;
+
+ *rb_link = node;
+}
+
+#endif /* _LINUX_RBTREE_H */
diff --git a/lib/Makefile b/lib/Makefile
index 5afbf13..8c5df08 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -1,4 +1,5 @@
obj-y += ctype.o
+obj-y += rbtree.o
obj-y += display_options.o
obj-y += ldiv.o
obj-y += string.o
diff --git a/lib/rbtree.c b/lib/rbtree.c
new file mode 100644
index 0000000..99e69bb
--- /dev/null
+++ b/lib/rbtree.c
@@ -0,0 +1,389 @@
+/*
+ Red Black Trees
+ (C) 1999 Andrea Arcangeli <andrea@suse.de>
+ (C) 2002 David Woodhouse <dwmw2@infradead.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ linux/lib/rbtree.c
+*/
+
+#include <linux/rbtree.h>
+
+static void __rb_rotate_left(struct rb_node *node, struct rb_root *root)
+{
+ struct rb_node *right = node->rb_right;
+ struct rb_node *parent = rb_parent(node);
+
+ if ((node->rb_right = right->rb_left))
+ rb_set_parent(right->rb_left, node);
+ right->rb_left = node;
+
+ rb_set_parent(right, parent);
+
+ if (parent)
+ {
+ if (node == parent->rb_left)
+ parent->rb_left = right;
+ else
+ parent->rb_right = right;
+ }
+ else
+ root->rb_node = right;
+ rb_set_parent(node, right);
+}
+
+static void __rb_rotate_right(struct rb_node *node, struct rb_root *root)
+{
+ struct rb_node *left = node->rb_left;
+ struct rb_node *parent = rb_parent(node);
+
+ if ((node->rb_left = left->rb_right))
+ rb_set_parent(left->rb_right, node);
+ left->rb_right = node;
+
+ rb_set_parent(left, parent);
+
+ if (parent)
+ {
+ if (node == parent->rb_right)
+ parent->rb_right = left;
+ else
+ parent->rb_left = left;
+ }
+ else
+ root->rb_node = left;
+ rb_set_parent(node, left);
+}
+
+void rb_insert_color(struct rb_node *node, struct rb_root *root)
+{
+ struct rb_node *parent, *gparent;
+
+ while ((parent = rb_parent(node)) && rb_is_red(parent))
+ {
+ gparent = rb_parent(parent);
+
+ if (parent == gparent->rb_left)
+ {
+ {
+ register struct rb_node *uncle = gparent->rb_right;
+ if (uncle && rb_is_red(uncle))
+ {
+ rb_set_black(uncle);
+ rb_set_black(parent);
+ rb_set_red(gparent);
+ node = gparent;
+ continue;
+ }
+ }
+
+ if (parent->rb_right == node)
+ {
+ register struct rb_node *tmp;
+ __rb_rotate_left(parent, root);
+ tmp = parent;
+ parent = node;
+ node = tmp;
+ }
+
+ rb_set_black(parent);
+ rb_set_red(gparent);
+ __rb_rotate_right(gparent, root);
+ } else {
+ {
+ register struct rb_node *uncle = gparent->rb_left;
+ if (uncle && rb_is_red(uncle))
+ {
+ rb_set_black(uncle);
+ rb_set_black(parent);
+ rb_set_red(gparent);
+ node = gparent;
+ continue;
+ }
+ }
+
+ if (parent->rb_left == node)
+ {
+ register struct rb_node *tmp;
+ __rb_rotate_right(parent, root);
+ tmp = parent;
+ parent = node;
+ node = tmp;
+ }
+
+ rb_set_black(parent);
+ rb_set_red(gparent);
+ __rb_rotate_left(gparent, root);
+ }
+ }
+
+ rb_set_black(root->rb_node);
+}
+
+static void __rb_erase_color(struct rb_node *node, struct rb_node *parent,
+ struct rb_root *root)
+{
+ struct rb_node *other;
+
+ while ((!node || rb_is_black(node)) && node != root->rb_node)
+ {
+ if (parent->rb_left == node)
+ {
+ other = parent->rb_right;
+ if (rb_is_red(other))
+ {
+ rb_set_black(other);
+ rb_set_red(parent);
+ __rb_rotate_left(parent, root);
+ other = parent->rb_right;
+ }
+ if ((!other->rb_left || rb_is_black(other->rb_left)) &&
+ (!other->rb_right || rb_is_black(other->rb_right)))
+ {
+ rb_set_red(other);
+ node = parent;
+ parent = rb_parent(node);
+ }
+ else
+ {
+ if (!other->rb_right || rb_is_black(other->rb_right))
+ {
+ struct rb_node *o_left;
+ if ((o_left = other->rb_left))
+ rb_set_black(o_left);
+ rb_set_red(other);
+ __rb_rotate_right(other, root);
+ other = parent->rb_right;
+ }
+ rb_set_color(other, rb_color(parent));
+ rb_set_black(parent);
+ if (other->rb_right)
+ rb_set_black(other->rb_right);
+ __rb_rotate_left(parent, root);
+ node = root->rb_node;
+ break;
+ }
+ }
+ else
+ {
+ other = parent->rb_left;
+ if (rb_is_red(other))
+ {
+ rb_set_black(other);
+ rb_set_red(parent);
+ __rb_rotate_right(parent, root);
+ other = parent->rb_left;
+ }
+ if ((!other->rb_left || rb_is_black(other->rb_left)) &&
+ (!other->rb_right || rb_is_black(other->rb_right)))
+ {
+ rb_set_red(other);
+ node = parent;
+ parent = rb_parent(node);
+ }
+ else
+ {
+ if (!other->rb_left || rb_is_black(other->rb_left))
+ {
+ register struct rb_node *o_right;
+ if ((o_right = other->rb_right))
+ rb_set_black(o_right);
+ rb_set_red(other);
+ __rb_rotate_left(other, root);
+ other = parent->rb_left;
+ }
+ rb_set_color(other, rb_color(parent));
+ rb_set_black(parent);
+ if (other->rb_left)
+ rb_set_black(other->rb_left);
+ __rb_rotate_right(parent, root);
+ node = root->rb_node;
+ break;
+ }
+ }
+ }
+ if (node)
+ rb_set_black(node);
+}
+
+void rb_erase(struct rb_node *node, struct rb_root *root)
+{
+ struct rb_node *child, *parent;
+ int color;
+
+ if (!node->rb_left)
+ child = node->rb_right;
+ else if (!node->rb_right)
+ child = node->rb_left;
+ else
+ {
+ struct rb_node *old = node, *left;
+
+ node = node->rb_right;
+ while ((left = node->rb_left) != NULL)
+ node = left;
+ child = node->rb_right;
+ parent = rb_parent(node);
+ color = rb_color(node);
+
+ if (child)
+ rb_set_parent(child, parent);
+ if (parent == old) {
+ parent->rb_right = child;
+ parent = node;
+ } else
+ parent->rb_left = child;
+
+ node->rb_parent_color = old->rb_parent_color;
+ node->rb_right = old->rb_right;
+ node->rb_left = old->rb_left;
+
+ if (rb_parent(old))
+ {
+ if (rb_parent(old)->rb_left == old)
+ rb_parent(old)->rb_left = node;
+ else
+ rb_parent(old)->rb_right = node;
+ } else
+ root->rb_node = node;
+
+ rb_set_parent(old->rb_left, node);
+ if (old->rb_right)
+ rb_set_parent(old->rb_right, node);
+ goto color;
+ }
+
+ parent = rb_parent(node);
+ color = rb_color(node);
+
+ if (child)
+ rb_set_parent(child, parent);
+ if (parent)
+ {
+ if (parent->rb_left == node)
+ parent->rb_left = child;
+ else
+ parent->rb_right = child;
+ }
+ else
+ root->rb_node = child;
+
+ color:
+ if (color == RB_BLACK)
+ __rb_erase_color(child, parent, root);
+}
+
+/*
+ * This function returns the first node (in sort order) of the tree.
+ */
+struct rb_node *rb_first(struct rb_root *root)
+{
+ struct rb_node *n;
+
+ n = root->rb_node;
+ if (!n)
+ return NULL;
+ while (n->rb_left)
+ n = n->rb_left;
+ return n;
+}
+
+struct rb_node *rb_last(struct rb_root *root)
+{
+ struct rb_node *n;
+
+ n = root->rb_node;
+ if (!n)
+ return NULL;
+ while (n->rb_right)
+ n = n->rb_right;
+ return n;
+}
+
+struct rb_node *rb_next(struct rb_node *node)
+{
+ struct rb_node *parent;
+
+ if (rb_parent(node) == node)
+ return NULL;
+
+ /* If we have a right-hand child, go down and then left as far
+ as we can. */
+ if (node->rb_right) {
+ node = node->rb_right;
+ while (node->rb_left)
+ node=node->rb_left;
+ return node;
+ }
+
+ /* No right-hand children. Everything down and left is
+ smaller than us, so any 'next' node must be in the general
+ direction of our parent. Go up the tree; any time the
+ ancestor is a right-hand child of its parent, keep going
+ up. First time it's a left-hand child of its parent, said
+ parent is our 'next' node. */
+ while ((parent = rb_parent(node)) && node == parent->rb_right)
+ node = parent;
+
+ return parent;
+}
+
+struct rb_node *rb_prev(struct rb_node *node)
+{
+ struct rb_node *parent;
+
+ if (rb_parent(node) == node)
+ return NULL;
+
+ /* If we have a left-hand child, go down and then right as far
+ as we can. */
+ if (node->rb_left) {
+ node = node->rb_left;
+ while (node->rb_right)
+ node=node->rb_right;
+ return node;
+ }
+
+ /* No left-hand children. Go up till we find an ancestor which
+ is a right-hand child of its parent */
+ while ((parent = rb_parent(node)) && node == parent->rb_left)
+ node = parent;
+
+ return parent;
+}
+
+void rb_replace_node(struct rb_node *victim, struct rb_node *new,
+ struct rb_root *root)
+{
+ struct rb_node *parent = rb_parent(victim);
+
+ /* Set the surrounding nodes to point to the replacement */
+ if (parent) {
+ if (victim == parent->rb_left)
+ parent->rb_left = new;
+ else
+ parent->rb_right = new;
+ } else {
+ root->rb_node = new;
+ }
+ if (victim->rb_left)
+ rb_set_parent(victim->rb_left, new);
+ if (victim->rb_right)
+ rb_set_parent(victim->rb_right, new);
+
+ /* Copy the pointers/colour from the victim to the replacement */
+ *new = *victim;
+}
--
1.7.1
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 04/12] add partition mtd support
2010-07-05 13:16 UBI support Sascha Hauer
` (2 preceding siblings ...)
2010-07-05 13:16 ` [PATCH 03/12] add rbtree support (needed for ubi) Sascha Hauer
@ 2010-07-05 13:16 ` Sascha Hauer
2010-07-05 13:16 ` [PATCH 05/12] cfi_flash: Do not typedef struct flash_info Sascha Hauer
` (9 subsequent siblings)
13 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/mtd/Makefile | 1 +
drivers/mtd/nand/nand.c | 2 +
drivers/mtd/partition.c | 143 +++++++++++++++++++++++++++++++++++++++++++
fs/Kconfig | 3 +
fs/devfs.c | 31 +++++++++
include/driver.h | 1 +
include/linux/mtd/mtd-abi.h | 1 +
include/linux/mtd/mtd.h | 3 +
8 files changed, 185 insertions(+), 0 deletions(-)
create mode 100644 drivers/mtd/partition.c
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
index 87ee6f4..299cca1 100644
--- a/drivers/mtd/Makefile
+++ b/drivers/mtd/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_NAND) += nand/
+obj-$(CONFIG_PARTITION_NEED_MTD) += partition.o
diff --git a/drivers/mtd/nand/nand.c b/drivers/mtd/nand/nand.c
index 4927231..6a150fe 100644
--- a/drivers/mtd/nand/nand.c
+++ b/drivers/mtd/nand/nand.c
@@ -123,6 +123,7 @@ static int nand_ioctl(struct cdev *cdev, int request, void *buf)
user->size = info->size;
user->erasesize = info->erasesize;
user->oobsize = info->oobsize;
+ user->mtd = info;
/* The below fields are obsolete */
user->ecctype = -1;
user->eccsize = 0;
@@ -220,6 +221,7 @@ int add_mtd_device(struct mtd_info *mtd)
mtd->cdev.name = asprintf("nand%d", mtd->class_dev.id);
mtd->cdev.priv = mtd;
mtd->cdev.dev = &mtd->class_dev;
+ mtd->cdev.mtd = mtd;
sprintf(str, "%u", mtd->size);
dev_add_param_fixed(&mtd->class_dev, "size", str);
diff --git a/drivers/mtd/partition.c b/drivers/mtd/partition.c
new file mode 100644
index 0000000..df2eb40
--- /dev/null
+++ b/drivers/mtd/partition.c
@@ -0,0 +1,143 @@
+#include <common.h>
+#include <errno.h>
+#include <malloc.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+
+struct mtd_part {
+ struct mtd_info mtd;
+ struct mtd_info *master;
+ uint64_t offset;
+ struct list_head list;
+};
+
+#define PART(x) ((struct mtd_part *)(x))
+
+static int mtd_part_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ struct mtd_part *part = PART(mtd);
+ struct mtd_ecc_stats stats;
+ int res;
+
+ stats = part->master->ecc_stats;
+
+ if (from >= mtd->size)
+ len = 0;
+ else if (from + len > mtd->size)
+ len = mtd->size - from;
+ res = part->master->read(part->master, from + part->offset,
+ len, retlen, buf);
+ return res;
+}
+
+static int mtd_part_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+{
+ struct mtd_part *part = PART(mtd);
+
+ if (!(mtd->flags & MTD_WRITEABLE))
+ return -EROFS;
+ if (to >= mtd->size)
+ len = 0;
+ else if (to + len > mtd->size)
+ len = mtd->size - to;
+ return part->master->write(part->master, to + part->offset,
+ len, retlen, buf);
+}
+
+static int mtd_part_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+ struct mtd_part *part = PART(mtd);
+ int ret;
+
+ if (!(mtd->flags & MTD_WRITEABLE))
+ return -EROFS;
+ if (instr->addr >= mtd->size)
+ return -EINVAL;
+ instr->addr += part->offset;
+ ret = part->master->erase(part->master, instr);
+ if (ret) {
+ if (instr->fail_addr != 0xffffffff)
+ instr->fail_addr -= part->offset;
+ instr->addr -= part->offset;
+ }
+ return ret;
+}
+
+static int mtd_part_block_isbad(struct mtd_info *mtd, loff_t ofs)
+{
+ struct mtd_part *part = PART(mtd);
+ if (ofs >= mtd->size)
+ return -EINVAL;
+ ofs += part->offset;
+ return part->master->block_isbad(part->master, ofs);
+}
+
+static int mtd_part_block_markbad(struct mtd_info *mtd, loff_t ofs)
+{
+ struct mtd_part *part = PART(mtd);
+ int res;
+
+ if (!(mtd->flags & MTD_WRITEABLE))
+ return -EROFS;
+ if (ofs >= mtd->size)
+ return -EINVAL;
+ ofs += part->offset;
+ res = part->master->block_markbad(part->master, ofs);
+ if (!res)
+ mtd->ecc_stats.badblocks++;
+ return res;
+}
+
+struct mtd_info *mtd_add_partition(struct mtd_info *mtd, off_t offset, size_t size,
+ unsigned long flags, const char *name)
+{
+ struct mtd_part *slave;
+ struct mtd_info *slave_mtd;
+ int start = 0, end = 0, i;
+
+ slave = xzalloc(sizeof(*slave));
+ slave_mtd = &slave->mtd;
+
+ memcpy(slave_mtd, mtd, sizeof(*slave));
+
+ /*
+ * find the number of eraseregions the partition includes.
+ * Do not bother to create the mtd_erase_region_infos as
+ * ubi is only interested in its number. UBI does not
+ * yet support multiple erase regions.
+ */
+ for (i = mtd->numeraseregions - 1; i >= 0; i--) {
+ struct mtd_erase_region_info *region = &mtd->eraseregions[i];
+ if (offset >= region->offset &&
+ offset < region->offset + region->erasesize * region->numblocks)
+ start = i;
+ if (offset + size >= region->offset &&
+ offset + size <= region->offset + region->erasesize * region->numblocks)
+ end = i;
+ }
+
+ slave_mtd->numeraseregions = end - start;
+
+ slave_mtd->read = mtd_part_read;
+ slave_mtd->write = mtd_part_write;
+ slave_mtd->erase = mtd_part_erase;
+ slave_mtd->block_isbad = mtd->block_isbad ? mtd_part_block_isbad : NULL;
+ slave_mtd->block_markbad = mtd->block_markbad ? mtd_part_block_markbad : NULL;
+ slave_mtd->size = size;
+ slave_mtd->name = strdup(name);
+
+ slave->offset = offset;
+ slave->master = mtd;
+
+ return slave_mtd;
+}
+
+void mtd_del_partition(struct mtd_info *mtd)
+{
+ struct mtd_part *part = PART(mtd);
+
+ free(mtd->name);
+ free(part);
+}
diff --git a/fs/Kconfig b/fs/Kconfig
index 3e9de96..d05797a 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -16,4 +16,7 @@ config FS_DEVFS
default y
prompt "devfs support"
+config PARTITION_NEED_MTD
+ bool
+
endmenu
diff --git a/fs/devfs.c b/fs/devfs.c
index 7478ef9..9ce9117 100644
--- a/fs/devfs.c
+++ b/fs/devfs.c
@@ -31,6 +31,8 @@
#include <linux/stat.h>
#include <ioctl.h>
#include <nand.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
#include <linux/mtd/mtd-abi.h>
#include <partition.h>
@@ -170,6 +172,7 @@ static int devfs_close(struct device_d *_dev, FILE *f)
static int partition_ioctl(struct cdev *cdev, int request, void *buf)
{
size_t offset;
+ struct mtd_info_user *user = buf;
switch (request) {
case MEMSETBADBLOCK:
@@ -178,6 +181,18 @@ static int partition_ioctl(struct cdev *cdev, int request, void *buf)
offset += cdev->offset;
return cdev->ops->ioctl(cdev, request, (void *)offset);
case MEMGETINFO:
+ if (cdev->mtd) {
+ user->type = cdev->mtd->type;
+ user->flags = cdev->mtd->flags;
+ user->size = cdev->mtd->size;
+ user->erasesize = cdev->mtd->erasesize;
+ user->oobsize = cdev->mtd->oobsize;
+ user->mtd = cdev->mtd;
+ /* The below fields are obsolete */
+ user->ecctype = -1;
+ user->eccsize = 0;
+ return 0;
+ }
return cdev->ops->ioctl(cdev, request, buf);
default:
return -EINVAL;
@@ -351,6 +366,17 @@ int devfs_add_partition(const char *devname, unsigned long offset, size_t size,
new->dev = cdev->dev;
new->flags = flags | DEVFS_IS_PARTITION;
+#ifdef CONFIG_PARTITION_NEED_MTD
+ if (cdev->mtd) {
+ new->mtd = mtd_add_partition(cdev->mtd, offset, size, flags, name);
+ if (IS_ERR(new->mtd)) {
+ int ret = PTR_ERR(new->mtd);
+ free(new);
+ return ret;
+ }
+ }
+#endif
+
devfs_create(new);
return 0;
@@ -370,6 +396,11 @@ int devfs_del_partition(const char *name)
if (cdev->flags & DEVFS_PARTITION_FIXED)
return -EPERM;
+#ifdef CONFIG_PARTITION_NEED_MTD
+ if (cdev->mtd)
+ mtd_del_partition(cdev->mtd);
+#endif
+
ret = devfs_remove(cdev);
if (ret)
return ret;
diff --git a/include/driver.h b/include/driver.h
index 6950c02..ae3e777 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -307,6 +307,7 @@ struct cdev {
size_t size;
unsigned int flags;
int open;
+ struct mtd_info *mtd;
};
int devfs_create(struct cdev *);
diff --git a/include/linux/mtd/mtd-abi.h b/include/linux/mtd/mtd-abi.h
index 04b4227..33e1fe2 100644
--- a/include/linux/mtd/mtd-abi.h
+++ b/include/linux/mtd/mtd-abi.h
@@ -62,6 +62,7 @@ struct mtd_info_user {
* (TODO: remove at some point) */
uint32_t ecctype;
uint32_t eccsize;
+ struct mtd_info *mtd;
};
struct region_info_user {
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index ca98a16..39ee992 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -229,6 +229,9 @@ struct mtd_notifier {
struct list_head list;
};
+struct mtd_info *mtd_add_partition(struct mtd_info *mtd, off_t offset, size_t size,
+ unsigned long flags, const char *name);
+void mtd_del_partition(struct mtd_info *mtd);
extern void register_mtd_user (struct mtd_notifier *new);
extern int unregister_mtd_user (struct mtd_notifier *old);
--
1.7.1
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 05/12] cfi_flash: Do not typedef struct flash_info
2010-07-05 13:16 UBI support Sascha Hauer
` (3 preceding siblings ...)
2010-07-05 13:16 ` [PATCH 04/12] add partition mtd support Sascha Hauer
@ 2010-07-05 13:16 ` Sascha Hauer
2010-07-05 13:16 ` [PATCH 06/12] cfi_flash: Do not print debug info while erasing Sascha Hauer
` (8 subsequent siblings)
13 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/nor/cfi_flash.c | 46 +++++++++++++++++++-------------------
drivers/nor/cfi_flash.h | 48 ++++++++++++++++++++--------------------
drivers/nor/cfi_flash_amd.c | 14 ++++++------
drivers/nor/cfi_flash_intel.c | 12 +++++-----
4 files changed, 60 insertions(+), 60 deletions(-)
diff --git a/drivers/nor/cfi_flash.c b/drivers/nor/cfi_flash.c
index b21739b..bf582ab 100644
--- a/drivers/nor/cfi_flash.c
+++ b/drivers/nor/cfi_flash.c
@@ -77,7 +77,7 @@ static uint flash_offset_cfi[2]={FLASH_OFFSET_CFI,FLASH_OFFSET_CFI_ALT};
* Functions
*/
-static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
+static void flash_add_byte (struct flash_info *info, cfiword_t * cword, uchar c)
{
#if defined(__LITTLE_ENDIAN)
unsigned short w;
@@ -114,7 +114,7 @@ static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
}
}
-static int flash_write_cfiword (flash_info_t * info, ulong dest,
+static int flash_write_cfiword (struct flash_info *info, ulong dest,
cfiword_t cword)
{
cfiptr_t cptr;
@@ -159,7 +159,7 @@ void print_longlong (char *str, unsigned long long data)
sprintf (&str[i * 2], "%2.2x", *cp++);
}
-static void flash_printqry (flash_info_t * info, flash_sect_t sect)
+static void flash_printqry (struct flash_info *info, flash_sect_t sect)
{
cfiptr_t cptr;
int x, y;
@@ -188,7 +188,7 @@ static void flash_printqry (flash_info_t * info, flash_sect_t sect)
/*
* read a short word by swapping for ppc format.
*/
-static ushort flash_read_ushort (flash_info_t * info, flash_sect_t sect, uint offset)
+static ushort flash_read_ushort (struct flash_info *info, flash_sect_t sect, uint offset)
{
uchar *addr;
ushort retval;
@@ -220,7 +220,7 @@ static ushort flash_read_ushort (flash_info_t * info, flash_sect_t sect, uint of
* read a long word by picking the least significant byte of each maximum
* port size word. Swap for ppc format.
*/
-static ulong flash_read_long (flash_info_t * info, flash_sect_t sect, uint offset)
+static ulong flash_read_long (struct flash_info *info, flash_sect_t sect, uint offset)
{
uchar *addr;
ulong retval;
@@ -254,7 +254,7 @@ static ulong flash_read_long (flash_info_t * info, flash_sect_t sect, uint offse
* http://www.jedec.org/download/search/jesd68.pdf
*
*/
-static int flash_detect_cfi (flash_info_t * info)
+static int flash_detect_cfi (struct flash_info *info)
{
int cfi_offset;
debug ("flash detect cfi\n");
@@ -291,7 +291,7 @@ static int flash_detect_cfi (flash_info_t * info)
/*
* The following code cannot be run from FLASH!
*/
-static ulong flash_get_size (flash_info_t *info, ulong base)
+static ulong flash_get_size (struct flash_info *info, ulong base)
{
int i, j;
flash_sect_t sect_cnt;
@@ -478,7 +478,7 @@ static ulong flash_get_size (flash_info_t *info, ulong base)
* when the passed address is greater or equal to the sector address
* we have a match
*/
-flash_sect_t find_sector (flash_info_t * info, ulong addr)
+flash_sect_t find_sector (struct flash_info *info, ulong addr)
{
flash_sect_t sector;
@@ -491,7 +491,7 @@ flash_sect_t find_sector (flash_info_t * info, ulong addr)
static int cfi_erase(struct cdev *cdev, size_t count, unsigned long offset)
{
- flash_info_t *finfo = (flash_info_t *)cdev->priv;
+ struct flash_info *finfo = (struct flash_info *)cdev->priv;
unsigned long start, end;
int i, ret = 0;
@@ -519,7 +519,7 @@ out:
* 1 - write timeout
* 2 - Flash not erased
*/
-static int write_buff (flash_info_t * info, const uchar * src, ulong addr, ulong cnt)
+static int write_buff (struct flash_info *info, const uchar * src, ulong addr, ulong cnt)
{
ulong wp;
ulong cp;
@@ -614,7 +614,7 @@ static int write_buff (flash_info_t * info, const uchar * src, ulong addr, ulong
return flash_write_cfiword (info, wp, cword);
}
-static int flash_real_protect (flash_info_t * info, long sector, int prot)
+static int flash_real_protect (struct flash_info *info, long sector, int prot)
{
int retcode = 0;
@@ -649,7 +649,7 @@ static int flash_real_protect (flash_info_t * info, long sector, int prot)
static int cfi_protect(struct cdev *cdev, size_t count, unsigned long offset, int prot)
{
- flash_info_t *finfo = (flash_info_t *)cdev->priv;
+ struct flash_info *finfo = (struct flash_info *)cdev->priv;
unsigned long start, end;
int i, ret = 0;
const char *action = (prot? "protect" : "unprotect");
@@ -672,7 +672,7 @@ out:
static ssize_t cfi_write(struct cdev *cdev, const void *buf, size_t count, unsigned long offset, ulong flags)
{
- flash_info_t *finfo = (flash_info_t *)cdev->priv;
+ struct flash_info *finfo = (struct flash_info *)cdev->priv;
int ret;
debug("cfi_write: buf=0x%08x addr=0x%08x count=0x%08x\n",buf, cdev->dev->map_base + offset, count);
@@ -683,7 +683,7 @@ static ssize_t cfi_write(struct cdev *cdev, const void *buf, size_t count, unsig
static void cfi_info (struct device_d* dev)
{
- flash_info_t *info = (flash_info_t *)dev->priv;
+ struct flash_info *info = (struct flash_info *)dev->priv;
int i;
if (info->flash_id != FLASH_MAN_CFI) {
@@ -775,7 +775,7 @@ static void cfi_info (struct device_d* dev)
/*
* flash_read_user_serial - read the OneTimeProgramming cells
*/
-static void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
+static void flash_read_user_serial (struct flash_info *info, void *buffer, int offset,
int len)
{
uchar *src;
@@ -791,7 +791,7 @@ static void flash_read_user_serial (flash_info_t * info, void *buffer, int offse
/*
* flash_read_factory_serial - read the device Id from the protection area
*/
-static void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
+static void flash_read_factory_serial (struct flash_info *info, void *buffer, int offset,
int len)
{
uchar *src;
@@ -804,7 +804,7 @@ static void flash_read_factory_serial (flash_info_t * info, void *buffer, int of
#endif
-int flash_status_check (flash_info_t * info, flash_sect_t sector,
+int flash_status_check (struct flash_info *info, flash_sect_t sector,
uint64_t tout, char *prompt)
{
return info->cfi_cmd_set->flash_status_check(info, sector, tout, prompt);
@@ -814,7 +814,7 @@ int flash_status_check (flash_info_t * info, flash_sect_t sector,
* wait for XSR.7 to be set. Time out with an error if it does not.
* This routine does not set the flash to read-array mode.
*/
-int flash_generic_status_check (flash_info_t * info, flash_sect_t sector,
+int flash_generic_status_check (struct flash_info *info, flash_sect_t sector,
uint64_t tout, char *prompt)
{
uint64_t start;
@@ -839,7 +839,7 @@ int flash_generic_status_check (flash_info_t * info, flash_sect_t sector,
/*
* make a proper sized command based on the port and chip widths
*/
-void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf)
+void flash_make_cmd (struct flash_info *info, uchar cmd, void *cmdbuf)
{
int i;
uchar *cp = (uchar *) cmdbuf;
@@ -855,7 +855,7 @@ void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf)
/*
* Write a proper sized command to the correct address
*/
-void flash_write_cmd (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
+void flash_write_cmd (struct flash_info *info, flash_sect_t sect, uint offset, uchar cmd)
{
uchar *addr;
@@ -866,7 +866,7 @@ void flash_write_cmd (flash_info_t * info, flash_sect_t sect, uint offset, uchar
flash_write_word(info, cword, addr);
}
-int flash_isequal (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
+int flash_isequal (struct flash_info *info, flash_sect_t sect, uint offset, uchar cmd)
{
cfiptr_t cptr;
cfiword_t cword;
@@ -903,7 +903,7 @@ int flash_isequal (flash_info_t * info, flash_sect_t sect, uint offset, uchar cm
return retval;
}
-int flash_isset (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
+int flash_isset (struct flash_info *info, flash_sect_t sect, uint offset, uchar cmd)
{
cfiptr_t cptr;
cfiword_t cword;
@@ -937,7 +937,7 @@ struct file_operations cfi_ops = {
static int cfi_probe (struct device_d *dev)
{
unsigned long size = 0;
- flash_info_t *info = xzalloc(sizeof(flash_info_t));
+ struct flash_info *info = xzalloc(sizeof(*info));
dev->priv = (void *)info;
diff --git a/drivers/nor/cfi_flash.h b/drivers/nor/cfi_flash.h
index a8fa879..8e76c3e 100644
--- a/drivers/nor/cfi_flash.h
+++ b/drivers/nor/cfi_flash.h
@@ -34,7 +34,7 @@ struct cfi_cmd_set;
* FLASH Info: contains chip specific data, per FLASH bank
*/
-typedef struct {
+struct flash_info {
struct driver_d driver;
ulong size; /* total bank size in bytes */
ushort sector_count; /* number of erase units */
@@ -60,15 +60,15 @@ typedef struct {
ushort cfi_offset; /* offset for cfi query */
struct cfi_cmd_set *cfi_cmd_set;
struct cdev cdev;
-} flash_info_t;
+};
struct cfi_cmd_set {
- int (*flash_write_cfibuffer) (flash_info_t * info, ulong dest, const uchar * cp, int len);
- int (*flash_erase_one) (flash_info_t * info, long sect);
- int (*flash_is_busy) (flash_info_t * info, flash_sect_t sect);
- void (*flash_read_jedec_ids) (flash_info_t * info);
- void (*flash_prepare_write) (flash_info_t * info);
- int (*flash_status_check) (flash_info_t * info, flash_sect_t sector, uint64_t tout, char *prompt);
+ int (*flash_write_cfibuffer) (struct flash_info *info, ulong dest, const uchar * cp, int len);
+ int (*flash_erase_one) (struct flash_info *info, long sect);
+ int (*flash_is_busy) (struct flash_info *info, flash_sect_t sect);
+ void (*flash_read_jedec_ids) (struct flash_info *info);
+ void (*flash_prepare_write) (struct flash_info *info);
+ int (*flash_status_check) (struct flash_info *info, flash_sect_t sector, uint64_t tout, char *prompt);
};
extern struct cfi_cmd_set cfi_cmd_set_intel;
@@ -180,21 +180,21 @@ extern struct cfi_cmd_set cfi_cmd_set_amd;
#define CFI_FLASH_SHIFT_WIDTH 3
/* Prototypes */
-int flash_isset (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
-void flash_write_cmd (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
-flash_sect_t find_sector (flash_info_t * info, ulong addr);
-int flash_status_check (flash_info_t * info, flash_sect_t sector,
+int flash_isset (struct flash_info *info, flash_sect_t sect, uint offset, uchar cmd);
+void flash_write_cmd (struct flash_info *info, flash_sect_t sect, uint offset, uchar cmd);
+flash_sect_t find_sector (struct flash_info *info, ulong addr);
+int flash_status_check (struct flash_info *info, flash_sect_t sector,
uint64_t tout, char *prompt);
-int flash_generic_status_check (flash_info_t * info, flash_sect_t sector,
+int flash_generic_status_check (struct flash_info *info, flash_sect_t sector,
uint64_t tout, char *prompt);
-int flash_isequal (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
-void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf);
+int flash_isequal (struct flash_info *info, flash_sect_t sect, uint offset, uchar cmd);
+void flash_make_cmd (struct flash_info *info, uchar cmd, void *cmdbuf);
/*
* create an address based on the offset and the port width
*/
-static inline uchar *flash_make_addr (flash_info_t * info, flash_sect_t sect, uint offset)
+static inline uchar *flash_make_addr (struct flash_info *info, flash_sect_t sect, uint offset)
{
return ((uchar *) (info->start[sect] + (offset * info->portwidth)));
}
@@ -202,7 +202,7 @@ static inline uchar *flash_make_addr (flash_info_t * info, flash_sect_t sect, ui
/*
* read a character at a port width address
*/
-static inline uchar flash_read_uchar (flash_info_t * info, uint offset)
+static inline uchar flash_read_uchar (struct flash_info *info, uint offset)
{
uchar *cp;
@@ -252,7 +252,7 @@ typedef union {
volatile unsigned long long *llp;
} cfiptr_t;
-static inline void flash_write_word(flash_info_t *info, cfiword_t datum, void *addr)
+static inline void flash_write_word(struct flash_info *info, cfiword_t datum, void *addr)
{
if (bankwidth_is_1(info)) {
debug("fw addr %p val %02x\n", addr, datum.c);
@@ -268,21 +268,21 @@ static inline void flash_write_word(flash_info_t *info, cfiword_t datum, void *a
}
}
-extern void flash_print_info (flash_info_t *);
+extern void flash_print_info (struct flash_info *);
extern int flash_sect_erase (ulong addr_first, ulong addr_last);
extern int flash_sect_protect (int flag, ulong addr_first, ulong addr_last);
/* common/flash.c */
-extern void flash_protect (int flag, ulong from, ulong to, flash_info_t *info);
+extern void flash_protect (int flag, ulong from, ulong to, struct flash_info *info);
extern int flash_write (char *, ulong, ulong);
-extern flash_info_t *addr2info (ulong);
+extern struct flash_info *addr2info (ulong);
//extern int write_buff (flash_info_t *info, const uchar *src, ulong addr, ulong cnt);
/* board/?/flash.c */
#if defined(CFG_FLASH_PROTECTION)
-extern int flash_real_protect(flash_info_t *info, long sector, int prot);
-extern void flash_read_user_serial(flash_info_t * info, void * buffer, int offset, int len);
-extern void flash_read_factory_serial(flash_info_t * info, void * buffer, int offset, int len);
+extern int flash_real_protect(struct flash_info *info, long sector, int prot);
+extern void flash_read_user_serial(struct flash_info *info, void * buffer, int offset, int len);
+extern void flash_read_factory_serial(struct flash_info *info, void * buffer, int offset, int len);
#endif /* CFG_FLASH_PROTECTION */
/*-----------------------------------------------------------------------
diff --git a/drivers/nor/cfi_flash_amd.c b/drivers/nor/cfi_flash_amd.c
index ea4c2c9..45b7e5c 100644
--- a/drivers/nor/cfi_flash_amd.c
+++ b/drivers/nor/cfi_flash_amd.c
@@ -2,7 +2,7 @@
#include <stdio.h>
#include "cfi_flash.h"
-static void flash_unlock_seq (flash_info_t * info)
+static void flash_unlock_seq (struct flash_info *info)
{
flash_write_cmd (info, 0, AMD_ADDR_START, AMD_CMD_UNLOCK_START);
flash_write_cmd (info, 0, AMD_ADDR_ACK, AMD_CMD_UNLOCK_ACK);
@@ -14,7 +14,7 @@ static void flash_unlock_seq (flash_info_t * info)
* Note: assume cfi->vendor, cfi->portwidth and cfi->chipwidth are correct
*
*/
-static void amd_read_jedec_ids (flash_info_t * info)
+static void amd_read_jedec_ids (struct flash_info *info)
{
info->manufacturer_id = 0;
info->device_id = 0;
@@ -39,7 +39,7 @@ static void amd_read_jedec_ids (flash_info_t * info)
flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
}
-static int flash_toggle (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
+static int flash_toggle (struct flash_info *info, flash_sect_t sect, uint offset, uchar cmd)
{
cfiptr_t cptr;
cfiword_t cword;
@@ -66,12 +66,12 @@ static int flash_toggle (flash_info_t * info, flash_sect_t sect, uint offset, uc
* flash_is_busy - check to see if the flash is busy
* This routine checks the status of the chip and returns true if the chip is busy
*/
-static int amd_flash_is_busy (flash_info_t * info, flash_sect_t sect)
+static int amd_flash_is_busy (struct flash_info *info, flash_sect_t sect)
{
return flash_toggle (info, sect, 0, AMD_STATUS_TOGGLE);
}
-static int amd_flash_erase_one (flash_info_t * info, long sect)
+static int amd_flash_erase_one (struct flash_info *info, long sect)
{
flash_unlock_seq(info);
flash_write_cmd (info, 0, AMD_ADDR_ERASE_START, AMD_CMD_ERASE_START);
@@ -81,14 +81,14 @@ static int amd_flash_erase_one (flash_info_t * info, long sect)
return flash_status_check(info, sect, info->erase_blk_tout, "erase");
}
-static void amd_flash_prepare_write(flash_info_t * info)
+static void amd_flash_prepare_write(struct flash_info *info)
{
flash_unlock_seq(info);
flash_write_cmd (info, 0, AMD_ADDR_START, AMD_CMD_WRITE);
}
#ifdef CONFIG_CFI_BUFFER_WRITE
-static int amd_flash_write_cfibuffer (flash_info_t * info, ulong dest, const uchar * cp,
+static int amd_flash_write_cfibuffer (struct flash_info *info, ulong dest, const uchar * cp,
int len)
{
flash_sect_t sector;
diff --git a/drivers/nor/cfi_flash_intel.c b/drivers/nor/cfi_flash_intel.c
index e4dfdfa..4344760 100644
--- a/drivers/nor/cfi_flash_intel.c
+++ b/drivers/nor/cfi_flash_intel.c
@@ -7,7 +7,7 @@
* Note: assume cfi->vendor, cfi->portwidth and cfi->chipwidth are correct
*
*/
-static void intel_read_jedec_ids (flash_info_t * info)
+static void intel_read_jedec_ids (struct flash_info *info)
{
info->manufacturer_id = 0;
info->device_id = 0;
@@ -27,12 +27,12 @@ static void intel_read_jedec_ids (flash_info_t * info)
* flash_is_busy - check to see if the flash is busy
* This routine checks the status of the chip and returns true if the chip is busy
*/
-static int intel_flash_is_busy (flash_info_t * info, flash_sect_t sect)
+static int intel_flash_is_busy (struct flash_info *info, flash_sect_t sect)
{
return !flash_isset (info, sect, 0, FLASH_STATUS_DONE);
}
-static int intel_flash_erase_one (flash_info_t * info, long sect)
+static int intel_flash_erase_one (struct flash_info *info, long sect)
{
flash_write_cmd (info, sect, 0, FLASH_CMD_CLEAR_STATUS);
flash_write_cmd (info, sect, 0, FLASH_CMD_BLOCK_ERASE);
@@ -41,14 +41,14 @@ static int intel_flash_erase_one (flash_info_t * info, long sect)
return flash_status_check(info, sect, info->erase_blk_tout, "erase");
}
-static void intel_flash_prepare_write(flash_info_t * info)
+static void intel_flash_prepare_write(struct flash_info *info)
{
flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
}
#ifdef CONFIG_CFI_BUFFER_WRITE
-static int intel_flash_write_cfibuffer (flash_info_t * info, ulong dest, const uchar * cp,
+static int intel_flash_write_cfibuffer (struct flash_info *info, ulong dest, const uchar * cp,
int len)
{
flash_sect_t sector;
@@ -94,7 +94,7 @@ static int intel_flash_write_cfibuffer (flash_info_t * info, ulong dest, const u
#define intel_flash_write_cfibuffer NULL
#endif /* CONFIG_CFI_BUFFER_WRITE */
-static int intel_flash_status_check (flash_info_t * info, flash_sect_t sector,
+static int intel_flash_status_check (struct flash_info *info, flash_sect_t sector,
uint64_t tout, char *prompt)
{
int retcode;
--
1.7.1
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 06/12] cfi_flash: Do not print debug info while erasing
2010-07-05 13:16 UBI support Sascha Hauer
` (4 preceding siblings ...)
2010-07-05 13:16 ` [PATCH 05/12] cfi_flash: Do not typedef struct flash_info Sascha Hauer
@ 2010-07-05 13:16 ` Sascha Hauer
2010-07-05 13:16 ` [PATCH 07/12] cfi_flash: Add mtd partition support for UBI Sascha Hauer
` (7 subsequent siblings)
13 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/nor/cfi_flash.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/nor/cfi_flash.c b/drivers/nor/cfi_flash.c
index bf582ab..ce30c98 100644
--- a/drivers/nor/cfi_flash.c
+++ b/drivers/nor/cfi_flash.c
@@ -495,7 +495,7 @@ static int cfi_erase(struct cdev *cdev, size_t count, unsigned long offset)
unsigned long start, end;
int i, ret = 0;
- printf("%s: erase 0x%08x (size %d)\n", __FUNCTION__, offset, count);
+ debug("%s: erase 0x%08x (size %d)\n", __func__, offset, count);
start = find_sector(finfo, cdev->dev->map_base + offset);
end = find_sector(finfo, cdev->dev->map_base + offset + count - 1);
--
1.7.1
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 07/12] cfi_flash: Add mtd partition support for UBI
2010-07-05 13:16 UBI support Sascha Hauer
` (5 preceding siblings ...)
2010-07-05 13:16 ` [PATCH 06/12] cfi_flash: Do not print debug info while erasing Sascha Hauer
@ 2010-07-05 13:16 ` Sascha Hauer
2010-07-05 13:16 ` [PATCH 08/12] devfs: only check for ioctl function when needed Sascha Hauer
` (6 subsequent siblings)
13 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/nor/cfi_flash.c | 95 +++++++++++++++++++++++++++++++++++++++++++++--
drivers/nor/cfi_flash.h | 7 +++
2 files changed, 98 insertions(+), 4 deletions(-)
diff --git a/drivers/nor/cfi_flash.c b/drivers/nor/cfi_flash.c
index ce30c98..fa5e5ee 100644
--- a/drivers/nor/cfi_flash.c
+++ b/drivers/nor/cfi_flash.c
@@ -302,6 +302,7 @@ static ulong flash_get_size (struct flash_info *info, ulong base)
int erase_region_size;
int erase_region_count;
int geometry_reversed = 0;
+ int cur_offset = 0;
info->ext_addr = 0;
info->cfi_version = 0;
@@ -401,10 +402,14 @@ static ulong flash_get_size (struct flash_info *info, ulong base)
size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
debug ("found %d erase regions\n", num_erase_regions);
+ info->eraseregions = xzalloc(sizeof(*(info->eraseregions)) * num_erase_regions);
+ info->numeraseregions = num_erase_regions;
sect_cnt = 0;
sector = base;
for (i = 0; i < num_erase_regions; i++) {
+ struct mtd_erase_region_info *region = &info->eraseregions[i];
+
if (i > NUM_ERASE_REGIONS) {
printf ("%d erase regions found, only %d used\n",
num_erase_regions, NUM_ERASE_REGIONS);
@@ -425,6 +430,11 @@ static ulong flash_get_size (struct flash_info *info, ulong base)
debug ("erase_region_count = %d erase_region_size = %d\n",
erase_region_count, erase_region_size);
+ region->offset = cur_offset;
+ region->erasesize = erase_region_size;
+ region->numblocks = erase_region_count;
+ cur_offset += erase_region_size * erase_region_count;
+
/* increase the space malloced for the sector start addresses */
info->start = realloc(info->start, sizeof(ulong) * (erase_region_count + sect_cnt));
info->protect = realloc(info->protect, sizeof(uchar) * (erase_region_count + sect_cnt));
@@ -489,7 +499,8 @@ flash_sect_t find_sector (struct flash_info *info, ulong addr)
return sector;
}
-static int cfi_erase(struct cdev *cdev, size_t count, unsigned long offset)
+static int __cfi_erase(struct cdev *cdev, size_t count, unsigned long offset,
+ int verbose)
{
struct flash_info *finfo = (struct flash_info *)cdev->priv;
unsigned long start, end;
@@ -500,19 +511,28 @@ static int cfi_erase(struct cdev *cdev, size_t count, unsigned long offset)
start = find_sector(finfo, cdev->dev->map_base + offset);
end = find_sector(finfo, cdev->dev->map_base + offset + count - 1);
- init_progression_bar(end - start);
+ if (verbose)
+ init_progression_bar(end - start);
for (i = start; i <= end; i++) {
ret = finfo->cfi_cmd_set->flash_erase_one(finfo, i);
if (ret)
goto out;
- show_progress(i - start);
+
+ if (verbose)
+ show_progress(i - start);
}
out:
- putchar('\n');
+ if (verbose)
+ putchar('\n');
return ret;
}
+static int cfi_erase(struct cdev *cdev, size_t count, unsigned long offset)
+{
+ return __cfi_erase(cdev, count, offset, 1);
+}
+
/*
* Copy memory to flash, returns:
* 0 - OK
@@ -934,6 +954,68 @@ struct file_operations cfi_ops = {
.memmap = generic_memmap_ro,
};
+#ifdef CONFIG_PARTITION_NEED_MTD
+static int cfi_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ struct flash_info *info = container_of(mtd, struct flash_info, mtd);
+
+ memcpy(buf, info->base + from, len);
+ *retlen = len;
+
+ return 0;
+}
+
+static int cfi_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+{
+ struct flash_info *info = container_of(mtd, struct flash_info, mtd);
+ int ret;
+
+ ret = write_buff(info, buf, (unsigned long)info->base + to, len);
+ *retlen = len;
+
+ return ret;
+}
+
+static int cfi_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+ struct flash_info *info = container_of(mtd, struct flash_info, mtd);
+ struct cdev *cdev = &info->cdev;
+ int ret;
+
+ ret = __cfi_erase(cdev, instr->len, instr->addr, 0);
+
+ if (ret) {
+ instr->state = MTD_ERASE_FAILED;
+ return -EIO;
+ }
+
+ instr->state = MTD_ERASE_DONE;
+ mtd_erase_callback(instr);
+
+ return 0;
+}
+
+static void cfi_init_mtd(struct flash_info *info)
+{
+ struct mtd_info *mtd = &info->mtd;
+
+ mtd->read = cfi_mtd_read;
+ mtd->write = cfi_mtd_write;
+ mtd->erase = cfi_mtd_erase;
+ mtd->size = info->size;
+ mtd->name = info->cdev.name;
+ mtd->erasesize = info->eraseregions[1].erasesize; /* FIXME */
+ mtd->writesize = 1;
+ mtd->subpage_sft = 0;
+ mtd->eraseregions = info->eraseregions;
+ mtd->numeraseregions = info->numeraseregions;
+ mtd->flags = MTD_CAP_NORFLASH;
+ info->cdev.mtd = mtd;
+}
+#endif
+
static int cfi_probe (struct device_d *dev)
{
unsigned long size = 0;
@@ -946,6 +1028,7 @@ static int cfi_probe (struct device_d *dev)
/* Init: no FLASHes known */
info->flash_id = FLASH_UNKNOWN;
size += info->size = flash_get_size(info, dev->map_base);
+ info->base = (void __iomem *)dev->map_base;
if (dev->size == 0) {
printf("cfi_probe: size : 0x%08x\n", info->size);
@@ -963,6 +1046,10 @@ static int cfi_probe (struct device_d *dev)
info->cdev.dev = dev;
info->cdev.ops = &cfi_ops;
info->cdev.priv = info;
+
+#ifdef CONFIG_PARTITION_NEED_MTD
+ cfi_init_mtd(info);
+#endif
devfs_create(&info->cdev);
return 0;
diff --git a/drivers/nor/cfi_flash.h b/drivers/nor/cfi_flash.h
index 8e76c3e..057e56c 100644
--- a/drivers/nor/cfi_flash.h
+++ b/drivers/nor/cfi_flash.h
@@ -26,6 +26,7 @@
#include <driver.h>
#include <asm/io.h>
+#include <linux/mtd/mtd.h>
typedef unsigned long flash_sect_t;
struct cfi_cmd_set;
@@ -60,6 +61,12 @@ struct flash_info {
ushort cfi_offset; /* offset for cfi query */
struct cfi_cmd_set *cfi_cmd_set;
struct cdev cdev;
+#ifdef CONFIG_PARTITION_NEED_MTD
+ struct mtd_info mtd;
+#endif
+ int numeraseregions;
+ struct mtd_erase_region_info *eraseregions;
+ void *base;
};
struct cfi_cmd_set {
--
1.7.1
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^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 08/12] devfs: only check for ioctl function when needed
2010-07-05 13:16 UBI support Sascha Hauer
` (6 preceding siblings ...)
2010-07-05 13:16 ` [PATCH 07/12] cfi_flash: Add mtd partition support for UBI Sascha Hauer
@ 2010-07-05 13:16 ` Sascha Hauer
2010-07-05 13:16 ` [PATCH 09/12] include stuff missing for ubi Sascha Hauer
` (5 subsequent siblings)
13 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
fs/devfs.c | 15 +++++++--------
1 files changed, 7 insertions(+), 8 deletions(-)
diff --git a/fs/devfs.c b/fs/devfs.c
index 9ce9117..7019c8d 100644
--- a/fs/devfs.c
+++ b/fs/devfs.c
@@ -193,6 +193,8 @@ static int partition_ioctl(struct cdev *cdev, int request, void *buf)
user->eccsize = 0;
return 0;
}
+ if (!cdev->ops->ioctl)
+ return -EINVAL;
return cdev->ops->ioctl(cdev, request, buf);
default:
return -EINVAL;
@@ -202,17 +204,14 @@ static int partition_ioctl(struct cdev *cdev, int request, void *buf)
static int devfs_ioctl(struct device_d *_dev, FILE *f, int request, void *buf)
{
struct cdev *cdev = f->inode;
- int ret = -EINVAL;
+
+ if (cdev->flags & DEVFS_IS_PARTITION)
+ return partition_ioctl(cdev, request, buf);
if (!cdev->ops->ioctl)
- goto out;
+ return -EINVAL;
- if (cdev->flags & DEVFS_IS_PARTITION)
- ret = partition_ioctl(cdev, request, buf);
- else
- ret = cdev->ops->ioctl(cdev, request, buf);
-out:
- return ret;
+ return cdev->ops->ioctl(cdev, request, buf);
}
static int devfs_truncate(struct device_d *dev, FILE *f, ulong size)
--
1.7.1
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^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 09/12] include stuff missing for ubi
2010-07-05 13:16 UBI support Sascha Hauer
` (7 preceding siblings ...)
2010-07-05 13:16 ` [PATCH 08/12] devfs: only check for ioctl function when needed Sascha Hauer
@ 2010-07-05 13:16 ` Sascha Hauer
2010-07-05 13:16 ` [PATCH 10/12] add ubi support from u-boot. Just enough to compile and scan Sascha Hauer
` (4 subsequent siblings)
13 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
include/linux/mtd/mtd.h | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 39ee992..01980f3 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -15,6 +15,7 @@
#include <linux/types.h>
#include <linux/list.h>
#include <linux/mtd/mtd-abi.h>
+#include <asm-generic/div64.h>
#define MTD_CHAR_MAJOR 90
#define MTD_BLOCK_MAJOR 31
@@ -211,7 +212,16 @@ struct mtd_info {
char *size_str;
};
+static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd)
+{
+ do_div(sz, mtd->erasesize);
+ return sz;
+}
+static inline uint32_t mtd_mod_by_eb(uint64_t sz, struct mtd_info *mtd)
+{
+ return do_div(sz, mtd->erasesize);
+}
/* Kernel-side ioctl definitions */
extern int add_mtd_device(struct mtd_info *mtd);
--
1.7.1
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^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 10/12] add ubi support from u-boot. Just enough to compile and scan
2010-07-05 13:16 UBI support Sascha Hauer
` (8 preceding siblings ...)
2010-07-05 13:16 ` [PATCH 09/12] include stuff missing for ubi Sascha Hauer
@ 2010-07-05 13:16 ` Sascha Hauer
2010-07-05 13:16 ` [PATCH 11/12] barebox ubi changes Sascha Hauer
` (3 subsequent siblings)
13 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
[-- Attachment #1: Type: text/plain, Size: 364322 bytes --]
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/mtd/Kconfig | 1 +
drivers/mtd/Makefile | 1 +
drivers/mtd/ubi/Kconfig | 6 +
drivers/mtd/ubi/Makefile | 3 +
drivers/mtd/ubi/build.c | 1189 +++++++++++++++++++++++++++++
drivers/mtd/ubi/crc32defs.h | 32 +
drivers/mtd/ubi/debug.c | 192 +++++
drivers/mtd/ubi/debug.h | 152 ++++
drivers/mtd/ubi/eba.c | 1256 ++++++++++++++++++++++++++++++
drivers/mtd/ubi/io.c | 1274 +++++++++++++++++++++++++++++++
drivers/mtd/ubi/kapi.c | 638 ++++++++++++++++
drivers/mtd/ubi/misc.c | 106 +++
drivers/mtd/ubi/scan.c | 1362 +++++++++++++++++++++++++++++++++
drivers/mtd/ubi/scan.h | 165 ++++
drivers/mtd/ubi/ubi-barebox.h | 191 +++++
drivers/mtd/ubi/ubi-media.h | 372 +++++++++
drivers/mtd/ubi/ubi.h | 641 ++++++++++++++++
drivers/mtd/ubi/upd.c | 441 +++++++++++
drivers/mtd/ubi/vmt.c | 866 +++++++++++++++++++++
drivers/mtd/ubi/vtbl.c | 837 ++++++++++++++++++++
drivers/mtd/ubi/wl.c | 1675 +++++++++++++++++++++++++++++++++++++++++
include/linux/mtd/ubi.h | 186 +++++
include/mtd/ubi-user.h | 268 +++++++
23 files changed, 11854 insertions(+), 0 deletions(-)
create mode 100644 drivers/mtd/ubi/Kconfig
create mode 100644 drivers/mtd/ubi/Makefile
create mode 100644 drivers/mtd/ubi/build.c
create mode 100644 drivers/mtd/ubi/crc32defs.h
create mode 100644 drivers/mtd/ubi/debug.c
create mode 100644 drivers/mtd/ubi/debug.h
create mode 100644 drivers/mtd/ubi/eba.c
create mode 100644 drivers/mtd/ubi/io.c
create mode 100644 drivers/mtd/ubi/kapi.c
create mode 100644 drivers/mtd/ubi/misc.c
create mode 100644 drivers/mtd/ubi/scan.c
create mode 100644 drivers/mtd/ubi/scan.h
create mode 100644 drivers/mtd/ubi/ubi-barebox.h
create mode 100644 drivers/mtd/ubi/ubi-media.h
create mode 100644 drivers/mtd/ubi/ubi.h
create mode 100644 drivers/mtd/ubi/upd.c
create mode 100644 drivers/mtd/ubi/vmt.c
create mode 100644 drivers/mtd/ubi/vtbl.c
create mode 100644 drivers/mtd/ubi/wl.c
create mode 100644 include/linux/mtd/ubi.h
create mode 100644 include/mtd/ubi-user.h
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
index 53183fc..562f0cd 100644
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -4,5 +4,6 @@ menuconfig MTD
if MTD
source "drivers/mtd/nand/Kconfig"
+source "drivers/mtd/ubi/Kconfig"
endif
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
index 299cca1..85bed11 100644
--- a/drivers/mtd/Makefile
+++ b/drivers/mtd/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_NAND) += nand/
+obj-$(CONFIG_UBI) += ubi/
obj-$(CONFIG_PARTITION_NEED_MTD) += partition.o
diff --git a/drivers/mtd/ubi/Kconfig b/drivers/mtd/ubi/Kconfig
new file mode 100644
index 0000000..35d321b
--- /dev/null
+++ b/drivers/mtd/ubi/Kconfig
@@ -0,0 +1,6 @@
+config UBI
+ bool "UBI support "
+ select PARTITION_NEED_MTD
+ help
+ This enables support for UBI (unsorted block images)
+
diff --git a/drivers/mtd/ubi/Makefile b/drivers/mtd/ubi/Makefile
new file mode 100644
index 0000000..425c185
--- /dev/null
+++ b/drivers/mtd/ubi/Makefile
@@ -0,0 +1,3 @@
+obj-y += build.o vtbl.o vmt.o upd.o kapi.o eba.o io.o wl.o scan.o misc.o debug.o
+
+
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
new file mode 100644
index 0000000..03ce392
--- /dev/null
+++ b/drivers/mtd/ubi/build.c
@@ -0,0 +1,1189 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ * Copyright (c) Nokia Corporation, 2007
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������),
+ * Frank Haverkamp
+ */
+
+/*
+ * This file includes UBI initialization and building of UBI devices.
+ *
+ * When UBI is initialized, it attaches all the MTD devices specified as the
+ * module load parameters or the kernel boot parameters. If MTD devices were
+ * specified, UBI does not attach any MTD device, but it is possible to do
+ * later using the "UBI control device".
+ *
+ * At the moment we only attach UBI devices by scanning, which will become a
+ * bottleneck when flashes reach certain large size. Then one may improve UBI
+ * and add other methods, although it does not seem to be easy to do.
+ */
+
+#ifdef UBI_LINUX
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/stringify.h>
+#include <linux/stat.h>
+#include <linux/miscdevice.h>
+#include <linux/log2.h>
+#include <linux/kthread.h>
+#endif
+#include "ubi-barebox.h"
+#include "ubi.h"
+
+/* Maximum length of the 'mtd=' parameter */
+#define MTD_PARAM_LEN_MAX 64
+
+/**
+ * struct mtd_dev_param - MTD device parameter description data structure.
+ * @name: MTD device name or number string
+ * @vid_hdr_offs: VID header offset
+ */
+struct mtd_dev_param
+{
+ char name[MTD_PARAM_LEN_MAX];
+ int vid_hdr_offs;
+};
+
+/* Numbers of elements set in the @mtd_dev_param array */
+static int mtd_devs = 0;
+
+/* MTD devices specification parameters */
+static struct mtd_dev_param mtd_dev_param[UBI_MAX_DEVICES];
+
+/* Root UBI "class" object (corresponds to '/<sysfs>/class/ubi/') */
+struct class *ubi_class;
+
+#ifdef UBI_LINUX
+/* Slab cache for wear-leveling entries */
+struct kmem_cache *ubi_wl_entry_slab;
+
+/* UBI control character device */
+static struct miscdevice ubi_ctrl_cdev = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "ubi_ctrl",
+ .fops = &ubi_ctrl_cdev_operations,
+};
+#endif
+
+/* All UBI devices in system */
+struct ubi_device *ubi_devices[UBI_MAX_DEVICES];
+
+#ifdef UBI_LINUX
+/* Serializes UBI devices creations and removals */
+DEFINE_MUTEX(ubi_devices_mutex);
+
+/* Protects @ubi_devices and @ubi->ref_count */
+static DEFINE_SPINLOCK(ubi_devices_lock);
+
+/* "Show" method for files in '/<sysfs>/class/ubi/' */
+static ssize_t ubi_version_show(struct class *class, char *buf)
+{
+ return sprintf(buf, "%d\n", UBI_VERSION);
+}
+
+/* UBI version attribute ('/<sysfs>/class/ubi/version') */
+static struct class_attribute ubi_version =
+ __ATTR(version, S_IRUGO, ubi_version_show, NULL);
+
+static ssize_t dev_attribute_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+/* UBI device attributes (correspond to files in '/<sysfs>/class/ubi/ubiX') */
+static struct device_attribute dev_eraseblock_size =
+ __ATTR(eraseblock_size, S_IRUGO, dev_attribute_show, NULL);
+static struct device_attribute dev_avail_eraseblocks =
+ __ATTR(avail_eraseblocks, S_IRUGO, dev_attribute_show, NULL);
+static struct device_attribute dev_total_eraseblocks =
+ __ATTR(total_eraseblocks, S_IRUGO, dev_attribute_show, NULL);
+static struct device_attribute dev_volumes_count =
+ __ATTR(volumes_count, S_IRUGO, dev_attribute_show, NULL);
+static struct device_attribute dev_max_ec =
+ __ATTR(max_ec, S_IRUGO, dev_attribute_show, NULL);
+static struct device_attribute dev_reserved_for_bad =
+ __ATTR(reserved_for_bad, S_IRUGO, dev_attribute_show, NULL);
+static struct device_attribute dev_bad_peb_count =
+ __ATTR(bad_peb_count, S_IRUGO, dev_attribute_show, NULL);
+static struct device_attribute dev_max_vol_count =
+ __ATTR(max_vol_count, S_IRUGO, dev_attribute_show, NULL);
+static struct device_attribute dev_min_io_size =
+ __ATTR(min_io_size, S_IRUGO, dev_attribute_show, NULL);
+static struct device_attribute dev_bgt_enabled =
+ __ATTR(bgt_enabled, S_IRUGO, dev_attribute_show, NULL);
+static struct device_attribute dev_mtd_num =
+ __ATTR(mtd_num, S_IRUGO, dev_attribute_show, NULL);
+#endif
+
+/**
+ * ubi_get_device - get UBI device.
+ * @ubi_num: UBI device number
+ *
+ * This function returns UBI device description object for UBI device number
+ * @ubi_num, or %NULL if the device does not exist. This function increases the
+ * device reference count to prevent removal of the device. In other words, the
+ * device cannot be removed if its reference count is not zero.
+ */
+struct ubi_device *ubi_get_device(int ubi_num)
+{
+ struct ubi_device *ubi;
+
+ spin_lock(&ubi_devices_lock);
+ ubi = ubi_devices[ubi_num];
+ if (ubi) {
+ ubi_assert(ubi->ref_count >= 0);
+ ubi->ref_count += 1;
+ get_device(&ubi->dev);
+ }
+ spin_unlock(&ubi_devices_lock);
+
+ return ubi;
+}
+
+/**
+ * ubi_put_device - drop an UBI device reference.
+ * @ubi: UBI device description object
+ */
+void ubi_put_device(struct ubi_device *ubi)
+{
+ spin_lock(&ubi_devices_lock);
+ ubi->ref_count -= 1;
+ put_device(&ubi->dev);
+ spin_unlock(&ubi_devices_lock);
+}
+
+/**
+ * ubi_get_by_major - get UBI device description object by character device
+ * major number.
+ * @major: major number
+ *
+ * This function is similar to 'ubi_get_device()', but it searches the device
+ * by its major number.
+ */
+struct ubi_device *ubi_get_by_major(int major)
+{
+ int i;
+ struct ubi_device *ubi;
+
+ spin_lock(&ubi_devices_lock);
+ for (i = 0; i < UBI_MAX_DEVICES; i++) {
+ ubi = ubi_devices[i];
+ if (ubi && MAJOR(ubi->cdev.dev) == major) {
+ ubi_assert(ubi->ref_count >= 0);
+ ubi->ref_count += 1;
+ get_device(&ubi->dev);
+ spin_unlock(&ubi_devices_lock);
+ return ubi;
+ }
+ }
+ spin_unlock(&ubi_devices_lock);
+
+ return NULL;
+}
+
+/**
+ * ubi_major2num - get UBI device number by character device major number.
+ * @major: major number
+ *
+ * This function searches UBI device number object by its major number. If UBI
+ * device was not found, this function returns -ENODEV, otherwise the UBI device
+ * number is returned.
+ */
+int ubi_major2num(int major)
+{
+ int i, ubi_num = -ENODEV;
+
+ spin_lock(&ubi_devices_lock);
+ for (i = 0; i < UBI_MAX_DEVICES; i++) {
+ struct ubi_device *ubi = ubi_devices[i];
+
+ if (ubi && MAJOR(ubi->cdev.dev) == major) {
+ ubi_num = ubi->ubi_num;
+ break;
+ }
+ }
+ spin_unlock(&ubi_devices_lock);
+
+ return ubi_num;
+}
+
+#ifdef UBI_LINUX
+/* "Show" method for files in '/<sysfs>/class/ubi/ubiX/' */
+static ssize_t dev_attribute_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ ssize_t ret;
+ struct ubi_device *ubi;
+
+ /*
+ * The below code looks weird, but it actually makes sense. We get the
+ * UBI device reference from the contained 'struct ubi_device'. But it
+ * is unclear if the device was removed or not yet. Indeed, if the
+ * device was removed before we increased its reference count,
+ * 'ubi_get_device()' will return -ENODEV and we fail.
+ *
+ * Remember, 'struct ubi_device' is freed in the release function, so
+ * we still can use 'ubi->ubi_num'.
+ */
+ ubi = container_of(dev, struct ubi_device, dev);
+ ubi = ubi_get_device(ubi->ubi_num);
+ if (!ubi)
+ return -ENODEV;
+
+ if (attr == &dev_eraseblock_size)
+ ret = sprintf(buf, "%d\n", ubi->leb_size);
+ else if (attr == &dev_avail_eraseblocks)
+ ret = sprintf(buf, "%d\n", ubi->avail_pebs);
+ else if (attr == &dev_total_eraseblocks)
+ ret = sprintf(buf, "%d\n", ubi->good_peb_count);
+ else if (attr == &dev_volumes_count)
+ ret = sprintf(buf, "%d\n", ubi->vol_count - UBI_INT_VOL_COUNT);
+ else if (attr == &dev_max_ec)
+ ret = sprintf(buf, "%d\n", ubi->max_ec);
+ else if (attr == &dev_reserved_for_bad)
+ ret = sprintf(buf, "%d\n", ubi->beb_rsvd_pebs);
+ else if (attr == &dev_bad_peb_count)
+ ret = sprintf(buf, "%d\n", ubi->bad_peb_count);
+ else if (attr == &dev_max_vol_count)
+ ret = sprintf(buf, "%d\n", ubi->vtbl_slots);
+ else if (attr == &dev_min_io_size)
+ ret = sprintf(buf, "%d\n", ubi->min_io_size);
+ else if (attr == &dev_bgt_enabled)
+ ret = sprintf(buf, "%d\n", ubi->thread_enabled);
+ else if (attr == &dev_mtd_num)
+ ret = sprintf(buf, "%d\n", ubi->mtd->index);
+ else
+ ret = -EINVAL;
+
+ ubi_put_device(ubi);
+ return ret;
+}
+
+/* Fake "release" method for UBI devices */
+static void dev_release(struct device *dev) { }
+
+/**
+ * ubi_sysfs_init - initialize sysfs for an UBI device.
+ * @ubi: UBI device description object
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int ubi_sysfs_init(struct ubi_device *ubi)
+{
+ int err;
+
+ ubi->dev.release = dev_release;
+ ubi->dev.devt = ubi->cdev.dev;
+ ubi->dev.class = ubi_class;
+ sprintf(&ubi->dev.bus_id[0], UBI_NAME_STR"%d", ubi->ubi_num);
+ err = device_register(&ubi->dev);
+ if (err)
+ return err;
+
+ err = device_create_file(&ubi->dev, &dev_eraseblock_size);
+ if (err)
+ return err;
+ err = device_create_file(&ubi->dev, &dev_avail_eraseblocks);
+ if (err)
+ return err;
+ err = device_create_file(&ubi->dev, &dev_total_eraseblocks);
+ if (err)
+ return err;
+ err = device_create_file(&ubi->dev, &dev_volumes_count);
+ if (err)
+ return err;
+ err = device_create_file(&ubi->dev, &dev_max_ec);
+ if (err)
+ return err;
+ err = device_create_file(&ubi->dev, &dev_reserved_for_bad);
+ if (err)
+ return err;
+ err = device_create_file(&ubi->dev, &dev_bad_peb_count);
+ if (err)
+ return err;
+ err = device_create_file(&ubi->dev, &dev_max_vol_count);
+ if (err)
+ return err;
+ err = device_create_file(&ubi->dev, &dev_min_io_size);
+ if (err)
+ return err;
+ err = device_create_file(&ubi->dev, &dev_bgt_enabled);
+ if (err)
+ return err;
+ err = device_create_file(&ubi->dev, &dev_mtd_num);
+ return err;
+}
+
+/**
+ * ubi_sysfs_close - close sysfs for an UBI device.
+ * @ubi: UBI device description object
+ */
+static void ubi_sysfs_close(struct ubi_device *ubi)
+{
+ device_remove_file(&ubi->dev, &dev_mtd_num);
+ device_remove_file(&ubi->dev, &dev_bgt_enabled);
+ device_remove_file(&ubi->dev, &dev_min_io_size);
+ device_remove_file(&ubi->dev, &dev_max_vol_count);
+ device_remove_file(&ubi->dev, &dev_bad_peb_count);
+ device_remove_file(&ubi->dev, &dev_reserved_for_bad);
+ device_remove_file(&ubi->dev, &dev_max_ec);
+ device_remove_file(&ubi->dev, &dev_volumes_count);
+ device_remove_file(&ubi->dev, &dev_total_eraseblocks);
+ device_remove_file(&ubi->dev, &dev_avail_eraseblocks);
+ device_remove_file(&ubi->dev, &dev_eraseblock_size);
+ device_unregister(&ubi->dev);
+}
+#endif
+
+/**
+ * kill_volumes - destroy all volumes.
+ * @ubi: UBI device description object
+ */
+static void kill_volumes(struct ubi_device *ubi)
+{
+ int i;
+
+ for (i = 0; i < ubi->vtbl_slots; i++)
+ if (ubi->volumes[i])
+ ubi_free_volume(ubi, ubi->volumes[i]);
+}
+
+/**
+ * uif_init - initialize user interfaces for an UBI device.
+ * @ubi: UBI device description object
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int uif_init(struct ubi_device *ubi)
+{
+ int i, err;
+#ifdef UBI_LINUX
+ dev_t dev;
+#endif
+
+ sprintf(ubi->ubi_name, UBI_NAME_STR "%d", ubi->ubi_num);
+
+ /*
+ * Major numbers for the UBI character devices are allocated
+ * dynamically. Major numbers of volume character devices are
+ * equivalent to ones of the corresponding UBI character device. Minor
+ * numbers of UBI character devices are 0, while minor numbers of
+ * volume character devices start from 1. Thus, we allocate one major
+ * number and ubi->vtbl_slots + 1 minor numbers.
+ */
+ err = alloc_chrdev_region(&dev, 0, ubi->vtbl_slots + 1, ubi->ubi_name);
+ if (err) {
+ ubi_err("cannot register UBI character devices");
+ return err;
+ }
+
+ ubi_assert(MINOR(dev) == 0);
+ cdev_init(&ubi->cdev, &ubi_cdev_operations);
+ dbg_msg("%s major is %u", ubi->ubi_name, MAJOR(dev));
+#ifdef UBI_LINUX
+ ubi->cdev.owner = THIS_MODULE;
+#endif
+ err = cdev_add(&ubi->cdev, dev, 1);
+ if (err) {
+ ubi_err("cannot add character device");
+ goto out_unreg;
+ }
+
+ err = ubi_sysfs_init(ubi);
+ if (err)
+ goto out_sysfs;
+
+ for (i = 0; i < ubi->vtbl_slots; i++)
+ if (ubi->volumes[i]) {
+ err = ubi_add_volume(ubi, ubi->volumes[i]);
+ if (err) {
+ ubi_err("cannot add volume %d", i);
+ goto out_volumes;
+ }
+ }
+
+ return 0;
+
+out_volumes:
+ kill_volumes(ubi);
+out_sysfs:
+ ubi_sysfs_close(ubi);
+ cdev_del(&ubi->cdev);
+out_unreg:
+ unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
+ ubi_err("cannot initialize UBI %s, error %d", ubi->ubi_name, err);
+ return err;
+}
+
+/**
+ * uif_close - close user interfaces for an UBI device.
+ * @ubi: UBI device description object
+ */
+static void uif_close(struct ubi_device *ubi)
+{
+ kill_volumes(ubi);
+ ubi_sysfs_close(ubi);
+ cdev_del(&ubi->cdev);
+ unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
+}
+
+/**
+ * attach_by_scanning - attach an MTD device using scanning method.
+ * @ubi: UBI device descriptor
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ *
+ * Note, currently this is the only method to attach UBI devices. Hopefully in
+ * the future we'll have more scalable attaching methods and avoid full media
+ * scanning. But even in this case scanning will be needed as a fall-back
+ * attaching method if there are some on-flash table corruptions.
+ */
+static int attach_by_scanning(struct ubi_device *ubi)
+{
+ int err;
+ struct ubi_scan_info *si;
+
+ si = ubi_scan(ubi);
+ if (IS_ERR(si))
+ return PTR_ERR(si);
+
+ ubi->bad_peb_count = si->bad_peb_count;
+ ubi->good_peb_count = ubi->peb_count - ubi->bad_peb_count;
+ ubi->max_ec = si->max_ec;
+ ubi->mean_ec = si->mean_ec;
+
+ err = ubi_read_volume_table(ubi, si);
+ if (err)
+ goto out_si;
+
+ err = ubi_wl_init_scan(ubi, si);
+ if (err)
+ goto out_vtbl;
+
+ err = ubi_eba_init_scan(ubi, si);
+ if (err)
+ goto out_wl;
+
+ ubi_scan_destroy_si(si);
+ return 0;
+
+out_wl:
+ ubi_wl_close(ubi);
+out_vtbl:
+ vfree(ubi->vtbl);
+out_si:
+ ubi_scan_destroy_si(si);
+ return err;
+}
+
+/**
+ * io_init - initialize I/O unit for a given UBI device.
+ * @ubi: UBI device description object
+ *
+ * If @ubi->vid_hdr_offset or @ubi->leb_start is zero, default offsets are
+ * assumed:
+ * o EC header is always at offset zero - this cannot be changed;
+ * o VID header starts just after the EC header at the closest address
+ * aligned to @io->hdrs_min_io_size;
+ * o data starts just after the VID header at the closest address aligned to
+ * @io->min_io_size
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int io_init(struct ubi_device *ubi)
+{
+ if (ubi->mtd->numeraseregions != 0) {
+ /*
+ * Some flashes have several erase regions. Different regions
+ * may have different eraseblock size and other
+ * characteristics. It looks like mostly multi-region flashes
+ * have one "main" region and one or more small regions to
+ * store boot loader code or boot parameters or whatever. I
+ * guess we should just pick the largest region. But this is
+ * not implemented.
+ */
+ ubi_err("multiple regions, not implemented");
+ return -EINVAL;
+ }
+
+ if (ubi->vid_hdr_offset < 0)
+ return -EINVAL;
+
+ /*
+ * Note, in this implementation we support MTD devices with 0x7FFFFFFF
+ * physical eraseblocks maximum.
+ */
+
+ ubi->peb_size = ubi->mtd->erasesize;
+ ubi->peb_count = mtd_div_by_eb(ubi->mtd->size, ubi->mtd);
+ ubi->flash_size = ubi->mtd->size;
+
+ if (ubi->mtd->block_isbad && ubi->mtd->block_markbad)
+ ubi->bad_allowed = 1;
+
+ ubi->min_io_size = ubi->mtd->writesize;
+ ubi->hdrs_min_io_size = ubi->mtd->writesize >> ubi->mtd->subpage_sft;
+
+ /*
+ * Make sure minimal I/O unit is power of 2. Note, there is no
+ * fundamental reason for this assumption. It is just an optimization
+ * which allows us to avoid costly division operations.
+ */
+ if (!is_power_of_2(ubi->min_io_size)) {
+ ubi_err("min. I/O unit (%d) is not power of 2",
+ ubi->min_io_size);
+ return -EINVAL;
+ }
+
+ ubi_assert(ubi->hdrs_min_io_size > 0);
+ ubi_assert(ubi->hdrs_min_io_size <= ubi->min_io_size);
+ ubi_assert(ubi->min_io_size % ubi->hdrs_min_io_size == 0);
+
+ /* Calculate default aligned sizes of EC and VID headers */
+ ubi->ec_hdr_alsize = ALIGN(UBI_EC_HDR_SIZE, ubi->hdrs_min_io_size);
+ ubi->vid_hdr_alsize = ALIGN(UBI_VID_HDR_SIZE, ubi->hdrs_min_io_size);
+
+ dbg_msg("min_io_size %d", ubi->min_io_size);
+ dbg_msg("hdrs_min_io_size %d", ubi->hdrs_min_io_size);
+ dbg_msg("ec_hdr_alsize %d", ubi->ec_hdr_alsize);
+ dbg_msg("vid_hdr_alsize %d", ubi->vid_hdr_alsize);
+
+ if (ubi->vid_hdr_offset == 0)
+ /* Default offset */
+ ubi->vid_hdr_offset = ubi->vid_hdr_aloffset =
+ ubi->ec_hdr_alsize;
+ else {
+ ubi->vid_hdr_aloffset = ubi->vid_hdr_offset &
+ ~(ubi->hdrs_min_io_size - 1);
+ ubi->vid_hdr_shift = ubi->vid_hdr_offset -
+ ubi->vid_hdr_aloffset;
+ }
+
+ /* Similar for the data offset */
+ ubi->leb_start = ubi->vid_hdr_offset + UBI_EC_HDR_SIZE;
+ ubi->leb_start = ALIGN(ubi->leb_start, ubi->min_io_size);
+
+ dbg_msg("vid_hdr_offset %d", ubi->vid_hdr_offset);
+ dbg_msg("vid_hdr_aloffset %d", ubi->vid_hdr_aloffset);
+ dbg_msg("vid_hdr_shift %d", ubi->vid_hdr_shift);
+ dbg_msg("leb_start %d", ubi->leb_start);
+
+ /* The shift must be aligned to 32-bit boundary */
+ if (ubi->vid_hdr_shift % 4) {
+ ubi_err("unaligned VID header shift %d",
+ ubi->vid_hdr_shift);
+ return -EINVAL;
+ }
+
+ /* Check sanity */
+ if (ubi->vid_hdr_offset < UBI_EC_HDR_SIZE ||
+ ubi->leb_start < ubi->vid_hdr_offset + UBI_VID_HDR_SIZE ||
+ ubi->leb_start > ubi->peb_size - UBI_VID_HDR_SIZE ||
+ ubi->leb_start & (ubi->min_io_size - 1)) {
+ ubi_err("bad VID header (%d) or data offsets (%d)",
+ ubi->vid_hdr_offset, ubi->leb_start);
+ return -EINVAL;
+ }
+
+ /*
+ * It may happen that EC and VID headers are situated in one minimal
+ * I/O unit. In this case we can only accept this UBI image in
+ * read-only mode.
+ */
+ if (ubi->vid_hdr_offset + UBI_VID_HDR_SIZE <= ubi->hdrs_min_io_size) {
+ ubi_warn("EC and VID headers are in the same minimal I/O unit, "
+ "switch to read-only mode");
+ ubi->ro_mode = 1;
+ }
+
+ ubi->leb_size = ubi->peb_size - ubi->leb_start;
+
+ if (!(ubi->mtd->flags & MTD_WRITEABLE)) {
+ ubi_msg("MTD device %d is write-protected, attach in "
+ "read-only mode", ubi->mtd->index);
+ ubi->ro_mode = 1;
+ }
+
+ ubi_msg("physical eraseblock size: %d bytes (%d KiB)",
+ ubi->peb_size, ubi->peb_size >> 10);
+ ubi_msg("logical eraseblock size: %d bytes", ubi->leb_size);
+ ubi_msg("smallest flash I/O unit: %d", ubi->min_io_size);
+ if (ubi->hdrs_min_io_size != ubi->min_io_size)
+ ubi_msg("sub-page size: %d",
+ ubi->hdrs_min_io_size);
+ ubi_msg("VID header offset: %d (aligned %d)",
+ ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
+ ubi_msg("data offset: %d", ubi->leb_start);
+
+ /*
+ * Note, ideally, we have to initialize ubi->bad_peb_count here. But
+ * unfortunately, MTD does not provide this information. We should loop
+ * over all physical eraseblocks and invoke mtd->block_is_bad() for
+ * each physical eraseblock. So, we skip ubi->bad_peb_count
+ * uninitialized and initialize it after scanning.
+ */
+
+ return 0;
+}
+
+/**
+ * autoresize - re-size the volume which has the "auto-resize" flag set.
+ * @ubi: UBI device description object
+ * @vol_id: ID of the volume to re-size
+ *
+ * This function re-sizes the volume marked by the @UBI_VTBL_AUTORESIZE_FLG in
+ * the volume table to the largest possible size. See comments in ubi-header.h
+ * for more description of the flag. Returns zero in case of success and a
+ * negative error code in case of failure.
+ */
+static int autoresize(struct ubi_device *ubi, int vol_id)
+{
+ struct ubi_volume_desc desc;
+ struct ubi_volume *vol = ubi->volumes[vol_id];
+ int err, old_reserved_pebs = vol->reserved_pebs;
+
+ /*
+ * Clear the auto-resize flag in the volume in-memory copy of the
+ * volume table, and 'ubi_resize_volume()' will propogate this change
+ * to the flash.
+ */
+ ubi->vtbl[vol_id].flags &= ~UBI_VTBL_AUTORESIZE_FLG;
+
+ if (ubi->avail_pebs == 0) {
+ struct ubi_vtbl_record vtbl_rec;
+
+ /*
+ * No avalilable PEBs to re-size the volume, clear the flag on
+ * flash and exit.
+ */
+ memcpy(&vtbl_rec, &ubi->vtbl[vol_id],
+ sizeof(struct ubi_vtbl_record));
+ err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
+ if (err)
+ ubi_err("cannot clean auto-resize flag for volume %d",
+ vol_id);
+ } else {
+ desc.vol = vol;
+ err = ubi_resize_volume(&desc,
+ old_reserved_pebs + ubi->avail_pebs);
+ if (err)
+ ubi_err("cannot auto-resize volume %d", vol_id);
+ }
+
+ if (err)
+ return err;
+
+ ubi_msg("volume %d (\"%s\") re-sized from %d to %d LEBs", vol_id,
+ vol->name, old_reserved_pebs, vol->reserved_pebs);
+ return 0;
+}
+
+/**
+ * ubi_attach_mtd_dev - attach an MTD device.
+ * @mtd_dev: MTD device description object
+ * @ubi_num: number to assign to the new UBI device
+ * @vid_hdr_offset: VID header offset
+ *
+ * This function attaches MTD device @mtd_dev to UBI and assign @ubi_num number
+ * to the newly created UBI device, unless @ubi_num is %UBI_DEV_NUM_AUTO, in
+ * which case this function finds a vacant device nubert and assings it
+ * automatically. Returns the new UBI device number in case of success and a
+ * negative error code in case of failure.
+ *
+ * Note, the invocations of this function has to be serialized by the
+ * @ubi_devices_mutex.
+ */
+int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
+{
+ struct ubi_device *ubi;
+ int i, err;
+
+ /*
+ * Check if we already have the same MTD device attached.
+ *
+ * Note, this function assumes that UBI devices creations and deletions
+ * are serialized, so it does not take the &ubi_devices_lock.
+ */
+ for (i = 0; i < UBI_MAX_DEVICES; i++) {
+ ubi = ubi_devices[i];
+ if (ubi && mtd->index == ubi->mtd->index) {
+ dbg_err("mtd%d is already attached to ubi%d",
+ mtd->index, i);
+ return -EEXIST;
+ }
+ }
+
+ /*
+ * Make sure this MTD device is not emulated on top of an UBI volume
+ * already. Well, generally this recursion works fine, but there are
+ * different problems like the UBI module takes a reference to itself
+ * by attaching (and thus, opening) the emulated MTD device. This
+ * results in inability to unload the module. And in general it makes
+ * no sense to attach emulated MTD devices, so we prohibit this.
+ */
+ if (mtd->type == MTD_UBIVOLUME) {
+ ubi_err("refuse attaching mtd%d - it is already emulated on "
+ "top of UBI", mtd->index);
+ return -EINVAL;
+ }
+
+ if (ubi_num == UBI_DEV_NUM_AUTO) {
+ /* Search for an empty slot in the @ubi_devices array */
+ for (ubi_num = 0; ubi_num < UBI_MAX_DEVICES; ubi_num++)
+ if (!ubi_devices[ubi_num])
+ break;
+ if (ubi_num == UBI_MAX_DEVICES) {
+ dbg_err("only %d UBI devices may be created", UBI_MAX_DEVICES);
+ return -ENFILE;
+ }
+ } else {
+ if (ubi_num >= UBI_MAX_DEVICES)
+ return -EINVAL;
+
+ /* Make sure ubi_num is not busy */
+ if (ubi_devices[ubi_num]) {
+ dbg_err("ubi%d already exists", ubi_num);
+ return -EEXIST;
+ }
+ }
+
+ ubi = kzalloc(sizeof(struct ubi_device), GFP_KERNEL);
+ if (!ubi)
+ return -ENOMEM;
+
+ ubi->mtd = mtd;
+ ubi->ubi_num = ubi_num;
+ ubi->vid_hdr_offset = vid_hdr_offset;
+ ubi->autoresize_vol_id = -1;
+
+ mutex_init(&ubi->buf_mutex);
+ mutex_init(&ubi->ckvol_mutex);
+ mutex_init(&ubi->volumes_mutex);
+ spin_lock_init(&ubi->volumes_lock);
+
+ ubi_msg("attaching mtd%d to ubi%d", mtd->index, ubi_num);
+
+ err = io_init(ubi);
+ if (err)
+ goto out_free;
+
+ err = -ENOMEM;
+ ubi->peb_buf1 = vmalloc(ubi->peb_size);
+ if (!ubi->peb_buf1)
+ goto out_free;
+
+ ubi->peb_buf2 = vmalloc(ubi->peb_size);
+ if (!ubi->peb_buf2)
+ goto out_free;
+
+#ifdef CONFIG_MTD_UBI_DEBUG
+ mutex_init(&ubi->dbg_buf_mutex);
+ ubi->dbg_peb_buf = vmalloc(ubi->peb_size);
+ if (!ubi->dbg_peb_buf)
+ goto out_free;
+#endif
+
+ err = attach_by_scanning(ubi);
+ if (err) {
+ dbg_err("failed to attach by scanning, error %d", err);
+ goto out_free;
+ }
+
+ if (ubi->autoresize_vol_id != -1) {
+ err = autoresize(ubi, ubi->autoresize_vol_id);
+ if (err)
+ goto out_detach;
+ }
+
+ err = uif_init(ubi);
+ if (err)
+ goto out_detach;
+
+ ubi->bgt_thread = kthread_create(ubi_thread, ubi, ubi->bgt_name);
+ if (IS_ERR(ubi->bgt_thread)) {
+ err = PTR_ERR(ubi->bgt_thread);
+ ubi_err("cannot spawn \"%s\", error %d", ubi->bgt_name,
+ err);
+ goto out_uif;
+ }
+
+ ubi_msg("attached mtd%d to ubi%d", mtd->index, ubi_num);
+ ubi_msg("MTD device name: \"%s\"", mtd->name);
+ ubi_msg("MTD device size: %llu MiB", ubi->flash_size >> 20);
+ ubi_msg("number of good PEBs: %d", ubi->good_peb_count);
+ ubi_msg("number of bad PEBs: %d", ubi->bad_peb_count);
+ ubi_msg("max. allowed volumes: %d", ubi->vtbl_slots);
+ ubi_msg("wear-leveling threshold: %d", CONFIG_MTD_UBI_WL_THRESHOLD);
+ ubi_msg("number of internal volumes: %d", UBI_INT_VOL_COUNT);
+ ubi_msg("number of user volumes: %d",
+ ubi->vol_count - UBI_INT_VOL_COUNT);
+ ubi_msg("available PEBs: %d", ubi->avail_pebs);
+ ubi_msg("total number of reserved PEBs: %d", ubi->rsvd_pebs);
+ ubi_msg("number of PEBs reserved for bad PEB handling: %d",
+ ubi->beb_rsvd_pebs);
+ ubi_msg("max/mean erase counter: %d/%d", ubi->max_ec, ubi->mean_ec);
+
+ /* Enable the background thread */
+ if (!DBG_DISABLE_BGT) {
+ ubi->thread_enabled = 1;
+ wake_up_process(ubi->bgt_thread);
+ }
+
+ ubi_devices[ubi_num] = ubi;
+ return ubi_num;
+
+out_uif:
+ uif_close(ubi);
+out_detach:
+ ubi_eba_close(ubi);
+ ubi_wl_close(ubi);
+ vfree(ubi->vtbl);
+out_free:
+ vfree(ubi->peb_buf1);
+ vfree(ubi->peb_buf2);
+#ifdef CONFIG_MTD_UBI_DEBUG
+ vfree(ubi->dbg_peb_buf);
+#endif
+ kfree(ubi);
+ return err;
+}
+
+/**
+ * ubi_detach_mtd_dev - detach an MTD device.
+ * @ubi_num: UBI device number to detach from
+ * @anyway: detach MTD even if device reference count is not zero
+ *
+ * This function destroys an UBI device number @ubi_num and detaches the
+ * underlying MTD device. Returns zero in case of success and %-EBUSY if the
+ * UBI device is busy and cannot be destroyed, and %-EINVAL if it does not
+ * exist.
+ *
+ * Note, the invocations of this function has to be serialized by the
+ * @ubi_devices_mutex.
+ */
+int ubi_detach_mtd_dev(int ubi_num, int anyway)
+{
+ struct ubi_device *ubi;
+
+ if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES)
+ return -EINVAL;
+
+ spin_lock(&ubi_devices_lock);
+ ubi = ubi_devices[ubi_num];
+ if (!ubi) {
+ spin_unlock(&ubi_devices_lock);
+ return -EINVAL;
+ }
+
+ if (ubi->ref_count) {
+ if (!anyway) {
+ spin_unlock(&ubi_devices_lock);
+ return -EBUSY;
+ }
+ /* This may only happen if there is a bug */
+ ubi_err("%s reference count %d, destroy anyway",
+ ubi->ubi_name, ubi->ref_count);
+ }
+ ubi_devices[ubi_num] = NULL;
+ spin_unlock(&ubi_devices_lock);
+
+ ubi_assert(ubi_num == ubi->ubi_num);
+ dbg_msg("detaching mtd%d from ubi%d", ubi->mtd->index, ubi_num);
+
+ /*
+ * Before freeing anything, we have to stop the background thread to
+ * prevent it from doing anything on this device while we are freeing.
+ */
+ if (ubi->bgt_thread)
+ kthread_stop(ubi->bgt_thread);
+
+ uif_close(ubi);
+ ubi_eba_close(ubi);
+ ubi_wl_close(ubi);
+ vfree(ubi->vtbl);
+ put_mtd_device(ubi->mtd);
+ vfree(ubi->peb_buf1);
+ vfree(ubi->peb_buf2);
+#ifdef CONFIG_MTD_UBI_DEBUG
+ vfree(ubi->dbg_peb_buf);
+#endif
+ ubi_msg("mtd%d is detached from ubi%d", ubi->mtd->index, ubi->ubi_num);
+ kfree(ubi);
+ return 0;
+}
+
+/**
+ * find_mtd_device - open an MTD device by its name or number.
+ * @mtd_dev: name or number of the device
+ *
+ * This function tries to open and MTD device described by @mtd_dev string,
+ * which is first treated as an ASCII number, and if it is not true, it is
+ * treated as MTD device name. Returns MTD device description object in case of
+ * success and a negative error code in case of failure.
+ */
+static struct mtd_info * __init open_mtd_device(const char *mtd_dev)
+{
+ struct mtd_info *mtd;
+ int mtd_num;
+ char *endp;
+
+ mtd_num = simple_strtoul(mtd_dev, &endp, 0);
+ if (*endp != '\0' || mtd_dev == endp) {
+ /*
+ * This does not look like an ASCII integer, probably this is
+ * MTD device name.
+ */
+ mtd = get_mtd_device_nm(mtd_dev);
+ } else
+ mtd = get_mtd_device(NULL, mtd_num);
+
+ return mtd;
+}
+
+int __init ubi_init(void)
+{
+ int err, i, k;
+
+ /* Ensure that EC and VID headers have correct size */
+ BUILD_BUG_ON(sizeof(struct ubi_ec_hdr) != 64);
+ BUILD_BUG_ON(sizeof(struct ubi_vid_hdr) != 64);
+
+ if (mtd_devs > UBI_MAX_DEVICES) {
+ ubi_err("too many MTD devices, maximum is %d", UBI_MAX_DEVICES);
+ return -EINVAL;
+ }
+
+ /* Create base sysfs directory and sysfs files */
+ ubi_class = class_create(THIS_MODULE, UBI_NAME_STR);
+ if (IS_ERR(ubi_class)) {
+ err = PTR_ERR(ubi_class);
+ ubi_err("cannot create UBI class");
+ goto out;
+ }
+
+ err = class_create_file(ubi_class, &ubi_version);
+ if (err) {
+ ubi_err("cannot create sysfs file");
+ goto out_class;
+ }
+
+ err = misc_register(&ubi_ctrl_cdev);
+ if (err) {
+ ubi_err("cannot register device");
+ goto out_version;
+ }
+
+#ifdef UBI_LINUX
+ ubi_wl_entry_slab = kmem_cache_create("ubi_wl_entry_slab",
+ sizeof(struct ubi_wl_entry),
+ 0, 0, NULL);
+ if (!ubi_wl_entry_slab)
+ goto out_dev_unreg;
+#endif
+
+ /* Attach MTD devices */
+ for (i = 0; i < mtd_devs; i++) {
+ struct mtd_dev_param *p = &mtd_dev_param[i];
+ struct mtd_info *mtd;
+
+ cond_resched();
+
+ mtd = open_mtd_device(p->name);
+ if (IS_ERR(mtd)) {
+ err = PTR_ERR(mtd);
+ goto out_detach;
+ }
+
+ mutex_lock(&ubi_devices_mutex);
+ err = ubi_attach_mtd_dev(mtd, UBI_DEV_NUM_AUTO,
+ p->vid_hdr_offs);
+ mutex_unlock(&ubi_devices_mutex);
+ if (err < 0) {
+ put_mtd_device(mtd);
+ ubi_err("cannot attach mtd%d", mtd->index);
+ goto out_detach;
+ }
+ }
+
+ return 0;
+
+out_detach:
+ for (k = 0; k < i; k++)
+ if (ubi_devices[k]) {
+ mutex_lock(&ubi_devices_mutex);
+ ubi_detach_mtd_dev(ubi_devices[k]->ubi_num, 1);
+ mutex_unlock(&ubi_devices_mutex);
+ }
+#ifdef UBI_LINUX
+ kmem_cache_destroy(ubi_wl_entry_slab);
+out_dev_unreg:
+#endif
+ misc_deregister(&ubi_ctrl_cdev);
+out_version:
+ class_remove_file(ubi_class, &ubi_version);
+out_class:
+ class_destroy(ubi_class);
+out:
+ ubi_err("UBI error: cannot initialize UBI, error %d", err);
+ return err;
+}
+module_init(ubi_init);
+
+void __exit ubi_exit(void)
+{
+ int i;
+
+ for (i = 0; i < UBI_MAX_DEVICES; i++)
+ if (ubi_devices[i]) {
+ mutex_lock(&ubi_devices_mutex);
+ ubi_detach_mtd_dev(ubi_devices[i]->ubi_num, 1);
+ mutex_unlock(&ubi_devices_mutex);
+ }
+ kmem_cache_destroy(ubi_wl_entry_slab);
+ misc_deregister(&ubi_ctrl_cdev);
+ class_remove_file(ubi_class, &ubi_version);
+ class_destroy(ubi_class);
+ mtd_devs = 0;
+}
+module_exit(ubi_exit);
+
+/**
+ * bytes_str_to_int - convert a string representing number of bytes to an
+ * integer.
+ * @str: the string to convert
+ *
+ * This function returns positive resulting integer in case of success and a
+ * negative error code in case of failure.
+ */
+static int __init bytes_str_to_int(const char *str)
+{
+ char *endp;
+ unsigned long result;
+
+ result = simple_strtoul(str, &endp, 0);
+ if (str == endp || result < 0) {
+ printk(KERN_ERR "UBI error: incorrect bytes count: \"%s\"\n",
+ str);
+ return -EINVAL;
+ }
+
+ switch (*endp) {
+ case 'G':
+ result *= 1024;
+ case 'M':
+ result *= 1024;
+ case 'K':
+ result *= 1024;
+ if (endp[1] == 'i' && endp[2] == 'B')
+ endp += 2;
+ case '\0':
+ break;
+ default:
+ printk(KERN_ERR "UBI error: incorrect bytes count: \"%s\"\n",
+ str);
+ return -EINVAL;
+ }
+
+ return result;
+}
+
+/**
+ * ubi_mtd_param_parse - parse the 'mtd=' UBI parameter.
+ * @val: the parameter value to parse
+ * @kp: not used
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of error.
+ */
+int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
+{
+ int i, len;
+ struct mtd_dev_param *p;
+ char buf[MTD_PARAM_LEN_MAX];
+ char *pbuf = &buf[0];
+ char *tokens[2] = {NULL, NULL};
+
+ if (!val)
+ return -EINVAL;
+
+ if (mtd_devs == UBI_MAX_DEVICES) {
+ printk(KERN_ERR "UBI error: too many parameters, max. is %d\n",
+ UBI_MAX_DEVICES);
+ return -EINVAL;
+ }
+
+ len = strnlen(val, MTD_PARAM_LEN_MAX);
+ if (len == MTD_PARAM_LEN_MAX) {
+ printk(KERN_ERR "UBI error: parameter \"%s\" is too long, "
+ "max. is %d\n", val, MTD_PARAM_LEN_MAX);
+ return -EINVAL;
+ }
+
+ if (len == 0) {
+ printk(KERN_WARNING "UBI warning: empty 'mtd=' parameter - "
+ "ignored\n");
+ return 0;
+ }
+
+ strcpy(buf, val);
+
+ /* Get rid of the final newline */
+ if (buf[len - 1] == '\n')
+ buf[len - 1] = '\0';
+
+ for (i = 0; i < 2; i++)
+ tokens[i] = strsep(&pbuf, ",");
+
+ if (pbuf) {
+ printk(KERN_ERR "UBI error: too many arguments at \"%s\"\n",
+ val);
+ return -EINVAL;
+ }
+
+ p = &mtd_dev_param[mtd_devs];
+ strcpy(&p->name[0], tokens[0]);
+
+ if (tokens[1])
+ p->vid_hdr_offs = bytes_str_to_int(tokens[1]);
+
+ if (p->vid_hdr_offs < 0)
+ return p->vid_hdr_offs;
+
+ mtd_devs += 1;
+ return 0;
+}
+
+module_param_call(mtd, ubi_mtd_param_parse, NULL, NULL, 000);
+MODULE_PARM_DESC(mtd, "MTD devices to attach. Parameter format: "
+ "mtd=<name|num>[,<vid_hdr_offs>].\n"
+ "Multiple \"mtd\" parameters may be specified.\n"
+ "MTD devices may be specified by their number or name.\n"
+ "Optional \"vid_hdr_offs\" parameter specifies UBI VID "
+ "header position and data starting position to be used "
+ "by UBI.\n"
+ "Example: mtd=content,1984 mtd=4 - attach MTD device"
+ "with name \"content\" using VID header offset 1984, and "
+ "MTD device number 4 with default VID header offset.");
+
+MODULE_VERSION(__stringify(UBI_VERSION));
+MODULE_DESCRIPTION("UBI - Unsorted Block Images");
+MODULE_AUTHOR("Artem Bityutskiy");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mtd/ubi/crc32defs.h b/drivers/mtd/ubi/crc32defs.h
new file mode 100644
index 0000000..f5a5401
--- /dev/null
+++ b/drivers/mtd/ubi/crc32defs.h
@@ -0,0 +1,32 @@
+/*
+ * There are multiple 16-bit CRC polynomials in common use, but this is
+ * *the* standard CRC-32 polynomial, first popularized by Ethernet.
+ * x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x^1+x^0
+ */
+#define CRCPOLY_LE 0xedb88320
+#define CRCPOLY_BE 0x04c11db7
+
+/* How many bits at a time to use. Requires a table of 4<<CRC_xx_BITS bytes. */
+/* For less performance-sensitive, use 4 */
+#ifndef CRC_LE_BITS
+# define CRC_LE_BITS 8
+#endif
+#ifndef CRC_BE_BITS
+# define CRC_BE_BITS 8
+#endif
+
+/*
+ * Little-endian CRC computation. Used with serial bit streams sent
+ * lsbit-first. Be sure to use cpu_to_le32() to append the computed CRC.
+ */
+#if CRC_LE_BITS > 8 || CRC_LE_BITS < 1 || CRC_LE_BITS & CRC_LE_BITS-1
+# error CRC_LE_BITS must be a power of 2 between 1 and 8
+#endif
+
+/*
+ * Big-endian CRC computation. Used with serial bit streams sent
+ * msbit-first. Be sure to use cpu_to_be32() to append the computed CRC.
+ */
+#if CRC_BE_BITS > 8 || CRC_BE_BITS < 1 || CRC_BE_BITS & CRC_BE_BITS-1
+# error CRC_BE_BITS must be a power of 2 between 1 and 8
+#endif
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
new file mode 100644
index 0000000..6e4b0ff
--- /dev/null
+++ b/drivers/mtd/ubi/debug.c
@@ -0,0 +1,192 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+/*
+ * Here we keep all the UBI debugging stuff which should normally be disabled
+ * and compiled-out, but it is extremely helpful when hunting bugs or doing big
+ * changes.
+ */
+#include "ubi-barebox.h"
+
+#ifdef CONFIG_MTD_UBI_DEBUG_MSG
+
+#include "ubi.h"
+
+/**
+ * ubi_dbg_dump_ec_hdr - dump an erase counter header.
+ * @ec_hdr: the erase counter header to dump
+ */
+void ubi_dbg_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr)
+{
+ dbg_msg("erase counter header dump:");
+ dbg_msg("magic %#08x", be32_to_cpu(ec_hdr->magic));
+ dbg_msg("version %d", (int)ec_hdr->version);
+ dbg_msg("ec %llu", (long long)be64_to_cpu(ec_hdr->ec));
+ dbg_msg("vid_hdr_offset %d", be32_to_cpu(ec_hdr->vid_hdr_offset));
+ dbg_msg("data_offset %d", be32_to_cpu(ec_hdr->data_offset));
+ dbg_msg("hdr_crc %#08x", be32_to_cpu(ec_hdr->hdr_crc));
+ dbg_msg("erase counter header hexdump:");
+ print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
+ ec_hdr, UBI_EC_HDR_SIZE, 1);
+}
+
+/**
+ * ubi_dbg_dump_vid_hdr - dump a volume identifier header.
+ * @vid_hdr: the volume identifier header to dump
+ */
+void ubi_dbg_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr)
+{
+ dbg_msg("volume identifier header dump:");
+ dbg_msg("magic %08x", be32_to_cpu(vid_hdr->magic));
+ dbg_msg("version %d", (int)vid_hdr->version);
+ dbg_msg("vol_type %d", (int)vid_hdr->vol_type);
+ dbg_msg("copy_flag %d", (int)vid_hdr->copy_flag);
+ dbg_msg("compat %d", (int)vid_hdr->compat);
+ dbg_msg("vol_id %d", be32_to_cpu(vid_hdr->vol_id));
+ dbg_msg("lnum %d", be32_to_cpu(vid_hdr->lnum));
+ dbg_msg("leb_ver %u", be32_to_cpu(vid_hdr->leb_ver));
+ dbg_msg("data_size %d", be32_to_cpu(vid_hdr->data_size));
+ dbg_msg("used_ebs %d", be32_to_cpu(vid_hdr->used_ebs));
+ dbg_msg("data_pad %d", be32_to_cpu(vid_hdr->data_pad));
+ dbg_msg("sqnum %llu",
+ (unsigned long long)be64_to_cpu(vid_hdr->sqnum));
+ dbg_msg("hdr_crc %08x", be32_to_cpu(vid_hdr->hdr_crc));
+ dbg_msg("volume identifier header hexdump:");
+}
+
+/**
+ * ubi_dbg_dump_vol_info- dump volume information.
+ * @vol: UBI volume description object
+ */
+void ubi_dbg_dump_vol_info(const struct ubi_volume *vol)
+{
+ dbg_msg("volume information dump:");
+ dbg_msg("vol_id %d", vol->vol_id);
+ dbg_msg("reserved_pebs %d", vol->reserved_pebs);
+ dbg_msg("alignment %d", vol->alignment);
+ dbg_msg("data_pad %d", vol->data_pad);
+ dbg_msg("vol_type %d", vol->vol_type);
+ dbg_msg("name_len %d", vol->name_len);
+ dbg_msg("usable_leb_size %d", vol->usable_leb_size);
+ dbg_msg("used_ebs %d", vol->used_ebs);
+ dbg_msg("used_bytes %lld", vol->used_bytes);
+ dbg_msg("last_eb_bytes %d", vol->last_eb_bytes);
+ dbg_msg("corrupted %d", vol->corrupted);
+ dbg_msg("upd_marker %d", vol->upd_marker);
+
+ if (vol->name_len <= UBI_VOL_NAME_MAX &&
+ strnlen(vol->name, vol->name_len + 1) == vol->name_len) {
+ dbg_msg("name %s", vol->name);
+ } else {
+ dbg_msg("the 1st 5 characters of the name: %c%c%c%c%c",
+ vol->name[0], vol->name[1], vol->name[2],
+ vol->name[3], vol->name[4]);
+ }
+}
+
+/**
+ * ubi_dbg_dump_vtbl_record - dump a &struct ubi_vtbl_record object.
+ * @r: the object to dump
+ * @idx: volume table index
+ */
+void ubi_dbg_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx)
+{
+ int name_len = be16_to_cpu(r->name_len);
+
+ dbg_msg("volume table record %d dump:", idx);
+ dbg_msg("reserved_pebs %d", be32_to_cpu(r->reserved_pebs));
+ dbg_msg("alignment %d", be32_to_cpu(r->alignment));
+ dbg_msg("data_pad %d", be32_to_cpu(r->data_pad));
+ dbg_msg("vol_type %d", (int)r->vol_type);
+ dbg_msg("upd_marker %d", (int)r->upd_marker);
+ dbg_msg("name_len %d", name_len);
+
+ if (r->name[0] == '\0') {
+ dbg_msg("name NULL");
+ return;
+ }
+
+ if (name_len <= UBI_VOL_NAME_MAX &&
+ strnlen(&r->name[0], name_len + 1) == name_len) {
+ dbg_msg("name %s", &r->name[0]);
+ } else {
+ dbg_msg("1st 5 characters of the name: %c%c%c%c%c",
+ r->name[0], r->name[1], r->name[2], r->name[3],
+ r->name[4]);
+ }
+ dbg_msg("crc %#08x", be32_to_cpu(r->crc));
+}
+
+/**
+ * ubi_dbg_dump_sv - dump a &struct ubi_scan_volume object.
+ * @sv: the object to dump
+ */
+void ubi_dbg_dump_sv(const struct ubi_scan_volume *sv)
+{
+ dbg_msg("volume scanning information dump:");
+ dbg_msg("vol_id %d", sv->vol_id);
+ dbg_msg("highest_lnum %d", sv->highest_lnum);
+ dbg_msg("leb_count %d", sv->leb_count);
+ dbg_msg("compat %d", sv->compat);
+ dbg_msg("vol_type %d", sv->vol_type);
+ dbg_msg("used_ebs %d", sv->used_ebs);
+ dbg_msg("last_data_size %d", sv->last_data_size);
+ dbg_msg("data_pad %d", sv->data_pad);
+}
+
+/**
+ * ubi_dbg_dump_seb - dump a &struct ubi_scan_leb object.
+ * @seb: the object to dump
+ * @type: object type: 0 - not corrupted, 1 - corrupted
+ */
+void ubi_dbg_dump_seb(const struct ubi_scan_leb *seb, int type)
+{
+ dbg_msg("eraseblock scanning information dump:");
+ dbg_msg("ec %d", seb->ec);
+ dbg_msg("pnum %d", seb->pnum);
+ if (type == 0) {
+ dbg_msg("lnum %d", seb->lnum);
+ dbg_msg("scrub %d", seb->scrub);
+ dbg_msg("sqnum %llu", seb->sqnum);
+ dbg_msg("leb_ver %u", seb->leb_ver);
+ }
+}
+
+/**
+ * ubi_dbg_dump_mkvol_req - dump a &struct ubi_mkvol_req object.
+ * @req: the object to dump
+ */
+void ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req)
+{
+ char nm[17];
+
+ dbg_msg("volume creation request dump:");
+ dbg_msg("vol_id %d", req->vol_id);
+ dbg_msg("alignment %d", req->alignment);
+ dbg_msg("bytes %lld", (long long)req->bytes);
+ dbg_msg("vol_type %d", req->vol_type);
+ dbg_msg("name_len %d", req->name_len);
+
+ memcpy(nm, req->name, 16);
+ nm[16] = 0;
+ dbg_msg("the 1st 16 characters of the name: %s", nm);
+}
+
+#endif /* CONFIG_MTD_UBI_DEBUG_MSG */
diff --git a/drivers/mtd/ubi/debug.h b/drivers/mtd/ubi/debug.h
new file mode 100644
index 0000000..b44380b
--- /dev/null
+++ b/drivers/mtd/ubi/debug.h
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+#ifndef __UBI_DEBUG_H__
+#define __UBI_DEBUG_H__
+
+#ifdef CONFIG_MTD_UBI_DEBUG
+#ifdef UBI_LINUX
+#include <linux/random.h>
+#endif
+
+#define ubi_assert(expr) BUG_ON(!(expr))
+#define dbg_err(fmt, ...) ubi_err(fmt, ##__VA_ARGS__)
+#else
+#define ubi_assert(expr) ({})
+#define dbg_err(fmt, ...) ({})
+#endif
+
+#ifdef CONFIG_MTD_UBI_DEBUG_DISABLE_BGT
+#define DBG_DISABLE_BGT 1
+#else
+#define DBG_DISABLE_BGT 0
+#endif
+
+#ifdef CONFIG_MTD_UBI_DEBUG_MSG
+/* Generic debugging message */
+#define dbg_msg(fmt, ...) \
+ printk(KERN_DEBUG "UBI DBG: %s: " fmt "\n", \
+ __FUNCTION__, ##__VA_ARGS__)
+
+#define ubi_dbg_dump_stack() dump_stack()
+
+struct ubi_ec_hdr;
+struct ubi_vid_hdr;
+struct ubi_volume;
+struct ubi_vtbl_record;
+struct ubi_scan_volume;
+struct ubi_scan_leb;
+struct ubi_mkvol_req;
+
+void ubi_dbg_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr);
+void ubi_dbg_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr);
+void ubi_dbg_dump_vol_info(const struct ubi_volume *vol);
+void ubi_dbg_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx);
+void ubi_dbg_dump_sv(const struct ubi_scan_volume *sv);
+void ubi_dbg_dump_seb(const struct ubi_scan_leb *seb, int type);
+void ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req);
+
+#else
+
+#define dbg_msg(fmt, ...) ({})
+#define ubi_dbg_dump_stack() ({})
+#define ubi_dbg_dump_ec_hdr(ec_hdr) ({})
+#define ubi_dbg_dump_vid_hdr(vid_hdr) ({})
+#define ubi_dbg_dump_vol_info(vol) ({})
+#define ubi_dbg_dump_vtbl_record(r, idx) ({})
+#define ubi_dbg_dump_sv(sv) ({})
+#define ubi_dbg_dump_seb(seb, type) ({})
+#define ubi_dbg_dump_mkvol_req(req) ({})
+
+#endif /* CONFIG_MTD_UBI_DEBUG_MSG */
+
+#ifdef CONFIG_MTD_UBI_DEBUG_MSG_EBA
+/* Messages from the eraseblock association unit */
+#define dbg_eba(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
+#else
+#define dbg_eba(fmt, ...) ({})
+#endif
+
+#ifdef CONFIG_MTD_UBI_DEBUG_MSG_WL
+/* Messages from the wear-leveling unit */
+#define dbg_wl(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
+#else
+#define dbg_wl(fmt, ...) ({})
+#endif
+
+#ifdef CONFIG_MTD_UBI_DEBUG_MSG_IO
+/* Messages from the input/output unit */
+#define dbg_io(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
+#else
+#define dbg_io(fmt, ...) ({})
+#endif
+
+#ifdef CONFIG_MTD_UBI_DEBUG_MSG_BLD
+/* Initialization and build messages */
+#define dbg_bld(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
+#else
+#define dbg_bld(fmt, ...) ({})
+#endif
+
+#ifdef CONFIG_MTD_UBI_DEBUG_EMULATE_BITFLIPS
+/**
+ * ubi_dbg_is_bitflip - if it is time to emulate a bit-flip.
+ *
+ * Returns non-zero if a bit-flip should be emulated, otherwise returns zero.
+ */
+static inline int ubi_dbg_is_bitflip(void)
+{
+ return !(random32() % 200);
+}
+#else
+#define ubi_dbg_is_bitflip() 0
+#endif
+
+#ifdef CONFIG_MTD_UBI_DEBUG_EMULATE_WRITE_FAILURES
+/**
+ * ubi_dbg_is_write_failure - if it is time to emulate a write failure.
+ *
+ * Returns non-zero if a write failure should be emulated, otherwise returns
+ * zero.
+ */
+static inline int ubi_dbg_is_write_failure(void)
+{
+ return !(random32() % 500);
+}
+#else
+#define ubi_dbg_is_write_failure() 0
+#endif
+
+#ifdef CONFIG_MTD_UBI_DEBUG_EMULATE_ERASE_FAILURES
+/**
+ * ubi_dbg_is_erase_failure - if its time to emulate an erase failure.
+ *
+ * Returns non-zero if an erase failure should be emulated, otherwise returns
+ * zero.
+ */
+static inline int ubi_dbg_is_erase_failure(void)
+{
+ return !(random32() % 400);
+}
+#else
+#define ubi_dbg_is_erase_failure() 0
+#endif
+
+#endif /* !__UBI_DEBUG_H__ */
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
new file mode 100644
index 0000000..8f2b3b1
--- /dev/null
+++ b/drivers/mtd/ubi/eba.c
@@ -0,0 +1,1256 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+/*
+ * The UBI Eraseblock Association (EBA) unit.
+ *
+ * This unit is responsible for I/O to/from logical eraseblock.
+ *
+ * Although in this implementation the EBA table is fully kept and managed in
+ * RAM, which assumes poor scalability, it might be (partially) maintained on
+ * flash in future implementations.
+ *
+ * The EBA unit implements per-logical eraseblock locking. Before accessing a
+ * logical eraseblock it is locked for reading or writing. The per-logical
+ * eraseblock locking is implemented by means of the lock tree. The lock tree
+ * is an RB-tree which refers all the currently locked logical eraseblocks. The
+ * lock tree elements are &struct ubi_ltree_entry objects. They are indexed by
+ * (@vol_id, @lnum) pairs.
+ *
+ * EBA also maintains the global sequence counter which is incremented each
+ * time a logical eraseblock is mapped to a physical eraseblock and it is
+ * stored in the volume identifier header. This means that each VID header has
+ * a unique sequence number. The sequence number is only increased an we assume
+ * 64 bits is enough to never overflow.
+ */
+
+#ifdef UBI_LINUX
+#include <linux/slab.h>
+#include <linux/crc32.h>
+#include <linux/err.h>
+#endif
+
+#include "ubi-barebox.h"
+#include "ubi.h"
+
+/* Number of physical eraseblocks reserved for atomic LEB change operation */
+#define EBA_RESERVED_PEBS 1
+
+/**
+ * next_sqnum - get next sequence number.
+ * @ubi: UBI device description object
+ *
+ * This function returns next sequence number to use, which is just the current
+ * global sequence counter value. It also increases the global sequence
+ * counter.
+ */
+static unsigned long long next_sqnum(struct ubi_device *ubi)
+{
+ unsigned long long sqnum;
+
+ spin_lock(&ubi->ltree_lock);
+ sqnum = ubi->global_sqnum++;
+ spin_unlock(&ubi->ltree_lock);
+
+ return sqnum;
+}
+
+/**
+ * ubi_get_compat - get compatibility flags of a volume.
+ * @ubi: UBI device description object
+ * @vol_id: volume ID
+ *
+ * This function returns compatibility flags for an internal volume. User
+ * volumes have no compatibility flags, so %0 is returned.
+ */
+static int ubi_get_compat(const struct ubi_device *ubi, int vol_id)
+{
+ if (vol_id == UBI_LAYOUT_VOLUME_ID)
+ return UBI_LAYOUT_VOLUME_COMPAT;
+ return 0;
+}
+
+/**
+ * ltree_lookup - look up the lock tree.
+ * @ubi: UBI device description object
+ * @vol_id: volume ID
+ * @lnum: logical eraseblock number
+ *
+ * This function returns a pointer to the corresponding &struct ubi_ltree_entry
+ * object if the logical eraseblock is locked and %NULL if it is not.
+ * @ubi->ltree_lock has to be locked.
+ */
+static struct ubi_ltree_entry *ltree_lookup(struct ubi_device *ubi, int vol_id,
+ int lnum)
+{
+ struct rb_node *p;
+
+ p = ubi->ltree.rb_node;
+ while (p) {
+ struct ubi_ltree_entry *le;
+
+ le = rb_entry(p, struct ubi_ltree_entry, rb);
+
+ if (vol_id < le->vol_id)
+ p = p->rb_left;
+ else if (vol_id > le->vol_id)
+ p = p->rb_right;
+ else {
+ if (lnum < le->lnum)
+ p = p->rb_left;
+ else if (lnum > le->lnum)
+ p = p->rb_right;
+ else
+ return le;
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ * ltree_add_entry - add new entry to the lock tree.
+ * @ubi: UBI device description object
+ * @vol_id: volume ID
+ * @lnum: logical eraseblock number
+ *
+ * This function adds new entry for logical eraseblock (@vol_id, @lnum) to the
+ * lock tree. If such entry is already there, its usage counter is increased.
+ * Returns pointer to the lock tree entry or %-ENOMEM if memory allocation
+ * failed.
+ */
+static struct ubi_ltree_entry *ltree_add_entry(struct ubi_device *ubi,
+ int vol_id, int lnum)
+{
+ struct ubi_ltree_entry *le, *le1, *le_free;
+
+ le = kmalloc(sizeof(struct ubi_ltree_entry), GFP_NOFS);
+ if (!le)
+ return ERR_PTR(-ENOMEM);
+
+ le->users = 0;
+ init_rwsem(&le->mutex);
+ le->vol_id = vol_id;
+ le->lnum = lnum;
+
+ spin_lock(&ubi->ltree_lock);
+ le1 = ltree_lookup(ubi, vol_id, lnum);
+
+ if (le1) {
+ /*
+ * This logical eraseblock is already locked. The newly
+ * allocated lock entry is not needed.
+ */
+ le_free = le;
+ le = le1;
+ } else {
+ struct rb_node **p, *parent = NULL;
+
+ /*
+ * No lock entry, add the newly allocated one to the
+ * @ubi->ltree RB-tree.
+ */
+ le_free = NULL;
+
+ p = &ubi->ltree.rb_node;
+ while (*p) {
+ parent = *p;
+ le1 = rb_entry(parent, struct ubi_ltree_entry, rb);
+
+ if (vol_id < le1->vol_id)
+ p = &(*p)->rb_left;
+ else if (vol_id > le1->vol_id)
+ p = &(*p)->rb_right;
+ else {
+ ubi_assert(lnum != le1->lnum);
+ if (lnum < le1->lnum)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+ }
+
+ rb_link_node(&le->rb, parent, p);
+ rb_insert_color(&le->rb, &ubi->ltree);
+ }
+ le->users += 1;
+ spin_unlock(&ubi->ltree_lock);
+
+ if (le_free)
+ kfree(le_free);
+
+ return le;
+}
+
+/**
+ * leb_read_lock - lock logical eraseblock for reading.
+ * @ubi: UBI device description object
+ * @vol_id: volume ID
+ * @lnum: logical eraseblock number
+ *
+ * This function locks a logical eraseblock for reading. Returns zero in case
+ * of success and a negative error code in case of failure.
+ */
+static int leb_read_lock(struct ubi_device *ubi, int vol_id, int lnum)
+{
+ struct ubi_ltree_entry *le;
+
+ le = ltree_add_entry(ubi, vol_id, lnum);
+ if (IS_ERR(le))
+ return PTR_ERR(le);
+ down_read(&le->mutex);
+ return 0;
+}
+
+/**
+ * leb_read_unlock - unlock logical eraseblock.
+ * @ubi: UBI device description object
+ * @vol_id: volume ID
+ * @lnum: logical eraseblock number
+ */
+static void leb_read_unlock(struct ubi_device *ubi, int vol_id, int lnum)
+{
+ int _free = 0;
+ struct ubi_ltree_entry *le;
+
+ spin_lock(&ubi->ltree_lock);
+ le = ltree_lookup(ubi, vol_id, lnum);
+ le->users -= 1;
+ ubi_assert(le->users >= 0);
+ if (le->users == 0) {
+ rb_erase(&le->rb, &ubi->ltree);
+ _free = 1;
+ }
+ spin_unlock(&ubi->ltree_lock);
+
+ up_read(&le->mutex);
+ if (_free)
+ kfree(le);
+}
+
+/**
+ * leb_write_lock - lock logical eraseblock for writing.
+ * @ubi: UBI device description object
+ * @vol_id: volume ID
+ * @lnum: logical eraseblock number
+ *
+ * This function locks a logical eraseblock for writing. Returns zero in case
+ * of success and a negative error code in case of failure.
+ */
+static int leb_write_lock(struct ubi_device *ubi, int vol_id, int lnum)
+{
+ struct ubi_ltree_entry *le;
+
+ le = ltree_add_entry(ubi, vol_id, lnum);
+ if (IS_ERR(le))
+ return PTR_ERR(le);
+ down_write(&le->mutex);
+ return 0;
+}
+
+/**
+ * leb_write_lock - lock logical eraseblock for writing.
+ * @ubi: UBI device description object
+ * @vol_id: volume ID
+ * @lnum: logical eraseblock number
+ *
+ * This function locks a logical eraseblock for writing if there is no
+ * contention and does nothing if there is contention. Returns %0 in case of
+ * success, %1 in case of contention, and and a negative error code in case of
+ * failure.
+ */
+static int leb_write_trylock(struct ubi_device *ubi, int vol_id, int lnum)
+{
+ int _free;
+ struct ubi_ltree_entry *le;
+
+ le = ltree_add_entry(ubi, vol_id, lnum);
+ if (IS_ERR(le))
+ return PTR_ERR(le);
+ if (down_write_trylock(&le->mutex))
+ return 0;
+
+ /* Contention, cancel */
+ spin_lock(&ubi->ltree_lock);
+ le->users -= 1;
+ ubi_assert(le->users >= 0);
+ if (le->users == 0) {
+ rb_erase(&le->rb, &ubi->ltree);
+ _free = 1;
+ } else
+ _free = 0;
+ spin_unlock(&ubi->ltree_lock);
+ if (_free)
+ kfree(le);
+
+ return 1;
+}
+
+/**
+ * leb_write_unlock - unlock logical eraseblock.
+ * @ubi: UBI device description object
+ * @vol_id: volume ID
+ * @lnum: logical eraseblock number
+ */
+static void leb_write_unlock(struct ubi_device *ubi, int vol_id, int lnum)
+{
+ int _free;
+ struct ubi_ltree_entry *le;
+
+ spin_lock(&ubi->ltree_lock);
+ le = ltree_lookup(ubi, vol_id, lnum);
+ le->users -= 1;
+ ubi_assert(le->users >= 0);
+ if (le->users == 0) {
+ rb_erase(&le->rb, &ubi->ltree);
+ _free = 1;
+ } else
+ _free = 0;
+ spin_unlock(&ubi->ltree_lock);
+
+ up_write(&le->mutex);
+ if (_free)
+ kfree(le);
+}
+
+/**
+ * ubi_eba_unmap_leb - un-map logical eraseblock.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ * @lnum: logical eraseblock number
+ *
+ * This function un-maps logical eraseblock @lnum and schedules corresponding
+ * physical eraseblock for erasure. Returns zero in case of success and a
+ * negative error code in case of failure.
+ */
+int ubi_eba_unmap_leb(struct ubi_device *ubi, struct ubi_volume *vol,
+ int lnum)
+{
+ int err, pnum, vol_id = vol->vol_id;
+
+ if (ubi->ro_mode)
+ return -EROFS;
+
+ err = leb_write_lock(ubi, vol_id, lnum);
+ if (err)
+ return err;
+
+ pnum = vol->eba_tbl[lnum];
+ if (pnum < 0)
+ /* This logical eraseblock is already unmapped */
+ goto out_unlock;
+
+ dbg_eba("erase LEB %d:%d, PEB %d", vol_id, lnum, pnum);
+
+ vol->eba_tbl[lnum] = UBI_LEB_UNMAPPED;
+ err = ubi_wl_put_peb(ubi, pnum, 0);
+
+out_unlock:
+ leb_write_unlock(ubi, vol_id, lnum);
+ return err;
+}
+
+/**
+ * ubi_eba_read_leb - read data.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ * @lnum: logical eraseblock number
+ * @buf: buffer to store the read data
+ * @offset: offset from where to read
+ * @len: how many bytes to read
+ * @check: data CRC check flag
+ *
+ * If the logical eraseblock @lnum is unmapped, @buf is filled with 0xFF
+ * bytes. The @check flag only makes sense for static volumes and forces
+ * eraseblock data CRC checking.
+ *
+ * In case of success this function returns zero. In case of a static volume,
+ * if data CRC mismatches - %-EBADMSG is returned. %-EBADMSG may also be
+ * returned for any volume type if an ECC error was detected by the MTD device
+ * driver. Other negative error cored may be returned in case of other errors.
+ */
+int ubi_eba_read_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum,
+ void *buf, int offset, int len, int check)
+{
+ int err, pnum, scrub = 0, vol_id = vol->vol_id;
+ struct ubi_vid_hdr *vid_hdr;
+ uint32_t uninitialized_var(crc);
+
+ err = leb_read_lock(ubi, vol_id, lnum);
+ if (err)
+ return err;
+
+ pnum = vol->eba_tbl[lnum];
+ if (pnum < 0) {
+ /*
+ * The logical eraseblock is not mapped, fill the whole buffer
+ * with 0xFF bytes. The exception is static volumes for which
+ * it is an error to read unmapped logical eraseblocks.
+ */
+ dbg_eba("read %d bytes from offset %d of LEB %d:%d (unmapped)",
+ len, offset, vol_id, lnum);
+ leb_read_unlock(ubi, vol_id, lnum);
+ ubi_assert(vol->vol_type != UBI_STATIC_VOLUME);
+ memset(buf, 0xFF, len);
+ return 0;
+ }
+
+ dbg_eba("read %d bytes from offset %d of LEB %d:%d, PEB %d",
+ len, offset, vol_id, lnum, pnum);
+
+ if (vol->vol_type == UBI_DYNAMIC_VOLUME)
+ check = 0;
+
+retry:
+ if (check) {
+ vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
+ if (!vid_hdr) {
+ err = -ENOMEM;
+ goto out_unlock;
+ }
+
+ err = ubi_io_read_vid_hdr(ubi, pnum, vid_hdr, 1);
+ if (err && err != UBI_IO_BITFLIPS) {
+ if (err > 0) {
+ /*
+ * The header is either absent or corrupted.
+ * The former case means there is a bug -
+ * switch to read-only mode just in case.
+ * The latter case means a real corruption - we
+ * may try to recover data. FIXME: but this is
+ * not implemented.
+ */
+ if (err == UBI_IO_BAD_VID_HDR) {
+ ubi_warn("bad VID header at PEB %d, LEB"
+ "%d:%d", pnum, vol_id, lnum);
+ err = -EBADMSG;
+ } else
+ ubi_ro_mode(ubi);
+ }
+ goto out_free;
+ } else if (err == UBI_IO_BITFLIPS)
+ scrub = 1;
+
+ ubi_assert(lnum < be32_to_cpu(vid_hdr->used_ebs));
+ ubi_assert(len == be32_to_cpu(vid_hdr->data_size));
+
+ crc = be32_to_cpu(vid_hdr->data_crc);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ }
+
+ err = ubi_io_read_data(ubi, buf, pnum, offset, len);
+ if (err) {
+ if (err == UBI_IO_BITFLIPS) {
+ scrub = 1;
+ err = 0;
+ } else if (err == -EBADMSG) {
+ if (vol->vol_type == UBI_DYNAMIC_VOLUME)
+ goto out_unlock;
+ scrub = 1;
+ if (!check) {
+ ubi_msg("force data checking");
+ check = 1;
+ goto retry;
+ }
+ } else
+ goto out_unlock;
+ }
+
+ if (check) {
+ uint32_t crc1 = crc32(UBI_CRC32_INIT, buf, len);
+ if (crc1 != crc) {
+ ubi_warn("CRC error: calculated %#08x, must be %#08x",
+ crc1, crc);
+ err = -EBADMSG;
+ goto out_unlock;
+ }
+ }
+
+ if (scrub)
+ err = ubi_wl_scrub_peb(ubi, pnum);
+
+ leb_read_unlock(ubi, vol_id, lnum);
+ return err;
+
+out_free:
+ ubi_free_vid_hdr(ubi, vid_hdr);
+out_unlock:
+ leb_read_unlock(ubi, vol_id, lnum);
+ return err;
+}
+
+/**
+ * recover_peb - recover from write failure.
+ * @ubi: UBI device description object
+ * @pnum: the physical eraseblock to recover
+ * @vol_id: volume ID
+ * @lnum: logical eraseblock number
+ * @buf: data which was not written because of the write failure
+ * @offset: offset of the failed write
+ * @len: how many bytes should have been written
+ *
+ * This function is called in case of a write failure and moves all good data
+ * from the potentially bad physical eraseblock to a good physical eraseblock.
+ * This function also writes the data which was not written due to the failure.
+ * Returns new physical eraseblock number in case of success, and a negative
+ * error code in case of failure.
+ */
+static int recover_peb(struct ubi_device *ubi, int pnum, int vol_id, int lnum,
+ const void *buf, int offset, int len)
+{
+ int err, idx = vol_id2idx(ubi, vol_id), new_pnum, data_size, tries = 0;
+ struct ubi_volume *vol = ubi->volumes[idx];
+ struct ubi_vid_hdr *vid_hdr;
+
+ vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
+ if (!vid_hdr) {
+ return -ENOMEM;
+ }
+
+ mutex_lock(&ubi->buf_mutex);
+
+retry:
+ new_pnum = ubi_wl_get_peb(ubi, UBI_UNKNOWN);
+ if (new_pnum < 0) {
+ mutex_unlock(&ubi->buf_mutex);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return new_pnum;
+ }
+
+ ubi_msg("recover PEB %d, move data to PEB %d", pnum, new_pnum);
+
+ err = ubi_io_read_vid_hdr(ubi, pnum, vid_hdr, 1);
+ if (err && err != UBI_IO_BITFLIPS) {
+ if (err > 0)
+ err = -EIO;
+ goto out_put;
+ }
+
+ vid_hdr->sqnum = cpu_to_be64(next_sqnum(ubi));
+ err = ubi_io_write_vid_hdr(ubi, new_pnum, vid_hdr);
+ if (err)
+ goto write_error;
+
+ data_size = offset + len;
+ memset(ubi->peb_buf1 + offset, 0xFF, len);
+
+ /* Read everything before the area where the write failure happened */
+ if (offset > 0) {
+ err = ubi_io_read_data(ubi, ubi->peb_buf1, pnum, 0, offset);
+ if (err && err != UBI_IO_BITFLIPS)
+ goto out_put;
+ }
+
+ memcpy(ubi->peb_buf1 + offset, buf, len);
+
+ err = ubi_io_write_data(ubi, ubi->peb_buf1, new_pnum, 0, data_size);
+ if (err)
+ goto write_error;
+
+ mutex_unlock(&ubi->buf_mutex);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+
+ vol->eba_tbl[lnum] = new_pnum;
+ ubi_wl_put_peb(ubi, pnum, 1);
+
+ ubi_msg("data was successfully recovered");
+ return 0;
+
+out_put:
+ mutex_unlock(&ubi->buf_mutex);
+ ubi_wl_put_peb(ubi, new_pnum, 1);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return err;
+
+write_error:
+ /*
+ * Bad luck? This physical eraseblock is bad too? Crud. Let's try to
+ * get another one.
+ */
+ ubi_warn("failed to write to PEB %d", new_pnum);
+ ubi_wl_put_peb(ubi, new_pnum, 1);
+ if (++tries > UBI_IO_RETRIES) {
+ mutex_unlock(&ubi->buf_mutex);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return err;
+ }
+ ubi_msg("try again");
+ goto retry;
+}
+
+/**
+ * ubi_eba_write_leb - write data to dynamic volume.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ * @lnum: logical eraseblock number
+ * @buf: the data to write
+ * @offset: offset within the logical eraseblock where to write
+ * @len: how many bytes to write
+ * @dtype: data type
+ *
+ * This function writes data to logical eraseblock @lnum of a dynamic volume
+ * @vol. Returns zero in case of success and a negative error code in case
+ * of failure. In case of error, it is possible that something was still
+ * written to the flash media, but may be some garbage.
+ */
+int ubi_eba_write_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum,
+ const void *buf, int offset, int len, int dtype)
+{
+ int err, pnum, tries = 0, vol_id = vol->vol_id;
+ struct ubi_vid_hdr *vid_hdr;
+
+ if (ubi->ro_mode)
+ return -EROFS;
+
+ err = leb_write_lock(ubi, vol_id, lnum);
+ if (err)
+ return err;
+
+ pnum = vol->eba_tbl[lnum];
+ if (pnum >= 0) {
+ dbg_eba("write %d bytes at offset %d of LEB %d:%d, PEB %d",
+ len, offset, vol_id, lnum, pnum);
+
+ err = ubi_io_write_data(ubi, buf, pnum, offset, len);
+ if (err) {
+ ubi_warn("failed to write data to PEB %d", pnum);
+ if (err == -EIO && ubi->bad_allowed)
+ err = recover_peb(ubi, pnum, vol_id, lnum, buf,
+ offset, len);
+ if (err)
+ ubi_ro_mode(ubi);
+ }
+ leb_write_unlock(ubi, vol_id, lnum);
+ return err;
+ }
+
+ /*
+ * The logical eraseblock is not mapped. We have to get a free physical
+ * eraseblock and write the volume identifier header there first.
+ */
+ vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
+ if (!vid_hdr) {
+ leb_write_unlock(ubi, vol_id, lnum);
+ return -ENOMEM;
+ }
+
+ vid_hdr->vol_type = UBI_VID_DYNAMIC;
+ vid_hdr->sqnum = cpu_to_be64(next_sqnum(ubi));
+ vid_hdr->vol_id = cpu_to_be32(vol_id);
+ vid_hdr->lnum = cpu_to_be32(lnum);
+ vid_hdr->compat = ubi_get_compat(ubi, vol_id);
+ vid_hdr->data_pad = cpu_to_be32(vol->data_pad);
+
+retry:
+ pnum = ubi_wl_get_peb(ubi, dtype);
+ if (pnum < 0) {
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ leb_write_unlock(ubi, vol_id, lnum);
+ return pnum;
+ }
+
+ dbg_eba("write VID hdr and %d bytes at offset %d of LEB %d:%d, PEB %d",
+ len, offset, vol_id, lnum, pnum);
+
+ err = ubi_io_write_vid_hdr(ubi, pnum, vid_hdr);
+ if (err) {
+ ubi_warn("failed to write VID header to LEB %d:%d, PEB %d",
+ vol_id, lnum, pnum);
+ goto write_error;
+ }
+
+ if (len) {
+ err = ubi_io_write_data(ubi, buf, pnum, offset, len);
+ if (err) {
+ ubi_warn("failed to write %d bytes at offset %d of "
+ "LEB %d:%d, PEB %d", len, offset, vol_id,
+ lnum, pnum);
+ goto write_error;
+ }
+ }
+
+ vol->eba_tbl[lnum] = pnum;
+
+ leb_write_unlock(ubi, vol_id, lnum);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return 0;
+
+write_error:
+ if (err != -EIO || !ubi->bad_allowed) {
+ ubi_ro_mode(ubi);
+ leb_write_unlock(ubi, vol_id, lnum);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return err;
+ }
+
+ /*
+ * Fortunately, this is the first write operation to this physical
+ * eraseblock, so just put it and request a new one. We assume that if
+ * this physical eraseblock went bad, the erase code will handle that.
+ */
+ err = ubi_wl_put_peb(ubi, pnum, 1);
+ if (err || ++tries > UBI_IO_RETRIES) {
+ ubi_ro_mode(ubi);
+ leb_write_unlock(ubi, vol_id, lnum);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return err;
+ }
+
+ vid_hdr->sqnum = cpu_to_be64(next_sqnum(ubi));
+ ubi_msg("try another PEB");
+ goto retry;
+}
+
+/**
+ * ubi_eba_write_leb_st - write data to static volume.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ * @lnum: logical eraseblock number
+ * @buf: data to write
+ * @len: how many bytes to write
+ * @dtype: data type
+ * @used_ebs: how many logical eraseblocks will this volume contain
+ *
+ * This function writes data to logical eraseblock @lnum of static volume
+ * @vol. The @used_ebs argument should contain total number of logical
+ * eraseblock in this static volume.
+ *
+ * When writing to the last logical eraseblock, the @len argument doesn't have
+ * to be aligned to the minimal I/O unit size. Instead, it has to be equivalent
+ * to the real data size, although the @buf buffer has to contain the
+ * alignment. In all other cases, @len has to be aligned.
+ *
+ * It is prohibited to write more then once to logical eraseblocks of static
+ * volumes. This function returns zero in case of success and a negative error
+ * code in case of failure.
+ */
+int ubi_eba_write_leb_st(struct ubi_device *ubi, struct ubi_volume *vol,
+ int lnum, const void *buf, int len, int dtype,
+ int used_ebs)
+{
+ int err, pnum, tries = 0, data_size = len, vol_id = vol->vol_id;
+ struct ubi_vid_hdr *vid_hdr;
+ uint32_t crc;
+
+ if (ubi->ro_mode)
+ return -EROFS;
+
+ if (lnum == used_ebs - 1)
+ /* If this is the last LEB @len may be unaligned */
+ len = ALIGN(data_size, ubi->min_io_size);
+ else
+ ubi_assert(!(len & (ubi->min_io_size - 1)));
+
+ vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
+ if (!vid_hdr)
+ return -ENOMEM;
+
+ err = leb_write_lock(ubi, vol_id, lnum);
+ if (err) {
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return err;
+ }
+
+ vid_hdr->sqnum = cpu_to_be64(next_sqnum(ubi));
+ vid_hdr->vol_id = cpu_to_be32(vol_id);
+ vid_hdr->lnum = cpu_to_be32(lnum);
+ vid_hdr->compat = ubi_get_compat(ubi, vol_id);
+ vid_hdr->data_pad = cpu_to_be32(vol->data_pad);
+
+ crc = crc32(UBI_CRC32_INIT, buf, data_size);
+ vid_hdr->vol_type = UBI_VID_STATIC;
+ vid_hdr->data_size = cpu_to_be32(data_size);
+ vid_hdr->used_ebs = cpu_to_be32(used_ebs);
+ vid_hdr->data_crc = cpu_to_be32(crc);
+
+retry:
+ pnum = ubi_wl_get_peb(ubi, dtype);
+ if (pnum < 0) {
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ leb_write_unlock(ubi, vol_id, lnum);
+ return pnum;
+ }
+
+ dbg_eba("write VID hdr and %d bytes at LEB %d:%d, PEB %d, used_ebs %d",
+ len, vol_id, lnum, pnum, used_ebs);
+
+ err = ubi_io_write_vid_hdr(ubi, pnum, vid_hdr);
+ if (err) {
+ ubi_warn("failed to write VID header to LEB %d:%d, PEB %d",
+ vol_id, lnum, pnum);
+ goto write_error;
+ }
+
+ err = ubi_io_write_data(ubi, buf, pnum, 0, len);
+ if (err) {
+ ubi_warn("failed to write %d bytes of data to PEB %d",
+ len, pnum);
+ goto write_error;
+ }
+
+ ubi_assert(vol->eba_tbl[lnum] < 0);
+ vol->eba_tbl[lnum] = pnum;
+
+ leb_write_unlock(ubi, vol_id, lnum);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return 0;
+
+write_error:
+ if (err != -EIO || !ubi->bad_allowed) {
+ /*
+ * This flash device does not admit of bad eraseblocks or
+ * something nasty and unexpected happened. Switch to read-only
+ * mode just in case.
+ */
+ ubi_ro_mode(ubi);
+ leb_write_unlock(ubi, vol_id, lnum);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return err;
+ }
+
+ err = ubi_wl_put_peb(ubi, pnum, 1);
+ if (err || ++tries > UBI_IO_RETRIES) {
+ ubi_ro_mode(ubi);
+ leb_write_unlock(ubi, vol_id, lnum);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return err;
+ }
+
+ vid_hdr->sqnum = cpu_to_be64(next_sqnum(ubi));
+ ubi_msg("try another PEB");
+ goto retry;
+}
+
+/*
+ * ubi_eba_atomic_leb_change - change logical eraseblock atomically.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ * @lnum: logical eraseblock number
+ * @buf: data to write
+ * @len: how many bytes to write
+ * @dtype: data type
+ *
+ * This function changes the contents of a logical eraseblock atomically. @buf
+ * has to contain new logical eraseblock data, and @len - the length of the
+ * data, which has to be aligned. This function guarantees that in case of an
+ * unclean reboot the old contents is preserved. Returns zero in case of
+ * success and a negative error code in case of failure.
+ *
+ * UBI reserves one LEB for the "atomic LEB change" operation, so only one
+ * LEB change may be done at a time. This is ensured by @ubi->alc_mutex.
+ */
+int ubi_eba_atomic_leb_change(struct ubi_device *ubi, struct ubi_volume *vol,
+ int lnum, const void *buf, int len, int dtype)
+{
+ int err, pnum, tries = 0, vol_id = vol->vol_id;
+ struct ubi_vid_hdr *vid_hdr;
+ uint32_t crc;
+
+ if (ubi->ro_mode)
+ return -EROFS;
+
+ if (len == 0) {
+ /*
+ * Special case when data length is zero. In this case the LEB
+ * has to be unmapped and mapped somewhere else.
+ */
+ err = ubi_eba_unmap_leb(ubi, vol, lnum);
+ if (err)
+ return err;
+ return ubi_eba_write_leb(ubi, vol, lnum, NULL, 0, 0, dtype);
+ }
+
+ vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
+ if (!vid_hdr)
+ return -ENOMEM;
+
+ mutex_lock(&ubi->alc_mutex);
+ err = leb_write_lock(ubi, vol_id, lnum);
+ if (err)
+ goto out_mutex;
+
+ vid_hdr->sqnum = cpu_to_be64(next_sqnum(ubi));
+ vid_hdr->vol_id = cpu_to_be32(vol_id);
+ vid_hdr->lnum = cpu_to_be32(lnum);
+ vid_hdr->compat = ubi_get_compat(ubi, vol_id);
+ vid_hdr->data_pad = cpu_to_be32(vol->data_pad);
+
+ crc = crc32(UBI_CRC32_INIT, buf, len);
+ vid_hdr->vol_type = UBI_VID_DYNAMIC;
+ vid_hdr->data_size = cpu_to_be32(len);
+ vid_hdr->copy_flag = 1;
+ vid_hdr->data_crc = cpu_to_be32(crc);
+
+retry:
+ pnum = ubi_wl_get_peb(ubi, dtype);
+ if (pnum < 0) {
+ err = pnum;
+ goto out_leb_unlock;
+ }
+
+ dbg_eba("change LEB %d:%d, PEB %d, write VID hdr to PEB %d",
+ vol_id, lnum, vol->eba_tbl[lnum], pnum);
+
+ err = ubi_io_write_vid_hdr(ubi, pnum, vid_hdr);
+ if (err) {
+ ubi_warn("failed to write VID header to LEB %d:%d, PEB %d",
+ vol_id, lnum, pnum);
+ goto write_error;
+ }
+
+ err = ubi_io_write_data(ubi, buf, pnum, 0, len);
+ if (err) {
+ ubi_warn("failed to write %d bytes of data to PEB %d",
+ len, pnum);
+ goto write_error;
+ }
+
+ if (vol->eba_tbl[lnum] >= 0) {
+ err = ubi_wl_put_peb(ubi, vol->eba_tbl[lnum], 1);
+ if (err)
+ goto out_leb_unlock;
+ }
+
+ vol->eba_tbl[lnum] = pnum;
+
+out_leb_unlock:
+ leb_write_unlock(ubi, vol_id, lnum);
+out_mutex:
+ mutex_unlock(&ubi->alc_mutex);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return err;
+
+write_error:
+ if (err != -EIO || !ubi->bad_allowed) {
+ /*
+ * This flash device does not admit of bad eraseblocks or
+ * something nasty and unexpected happened. Switch to read-only
+ * mode just in case.
+ */
+ ubi_ro_mode(ubi);
+ goto out_leb_unlock;
+ }
+
+ err = ubi_wl_put_peb(ubi, pnum, 1);
+ if (err || ++tries > UBI_IO_RETRIES) {
+ ubi_ro_mode(ubi);
+ goto out_leb_unlock;
+ }
+
+ vid_hdr->sqnum = cpu_to_be64(next_sqnum(ubi));
+ ubi_msg("try another PEB");
+ goto retry;
+}
+
+/**
+ * ubi_eba_copy_leb - copy logical eraseblock.
+ * @ubi: UBI device description object
+ * @from: physical eraseblock number from where to copy
+ * @to: physical eraseblock number where to copy
+ * @vid_hdr: VID header of the @from physical eraseblock
+ *
+ * This function copies logical eraseblock from physical eraseblock @from to
+ * physical eraseblock @to. The @vid_hdr buffer may be changed by this
+ * function. Returns:
+ * o %0 in case of success;
+ * o %1 if the operation was canceled and should be tried later (e.g.,
+ * because a bit-flip was detected at the target PEB);
+ * o %2 if the volume is being deleted and this LEB should not be moved.
+ */
+int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
+ struct ubi_vid_hdr *vid_hdr)
+{
+ int err, vol_id, lnum, data_size, aldata_size, idx;
+ struct ubi_volume *vol;
+ uint32_t crc;
+
+ vol_id = be32_to_cpu(vid_hdr->vol_id);
+ lnum = be32_to_cpu(vid_hdr->lnum);
+
+ dbg_eba("copy LEB %d:%d, PEB %d to PEB %d", vol_id, lnum, from, to);
+
+ if (vid_hdr->vol_type == UBI_VID_STATIC) {
+ data_size = be32_to_cpu(vid_hdr->data_size);
+ aldata_size = ALIGN(data_size, ubi->min_io_size);
+ } else
+ data_size = aldata_size =
+ ubi->leb_size - be32_to_cpu(vid_hdr->data_pad);
+
+ idx = vol_id2idx(ubi, vol_id);
+ spin_lock(&ubi->volumes_lock);
+ /*
+ * Note, we may race with volume deletion, which means that the volume
+ * this logical eraseblock belongs to might be being deleted. Since the
+ * volume deletion unmaps all the volume's logical eraseblocks, it will
+ * be locked in 'ubi_wl_put_peb()' and wait for the WL worker to finish.
+ */
+ vol = ubi->volumes[idx];
+ if (!vol) {
+ /* No need to do further work, cancel */
+ dbg_eba("volume %d is being removed, cancel", vol_id);
+ spin_unlock(&ubi->volumes_lock);
+ return 2;
+ }
+ spin_unlock(&ubi->volumes_lock);
+
+ /*
+ * We do not want anybody to write to this logical eraseblock while we
+ * are moving it, so lock it.
+ *
+ * Note, we are using non-waiting locking here, because we cannot sleep
+ * on the LEB, since it may cause deadlocks. Indeed, imagine a task is
+ * unmapping the LEB which is mapped to the PEB we are going to move
+ * (@from). This task locks the LEB and goes sleep in the
+ * 'ubi_wl_put_peb()' function on the @ubi->move_mutex. In turn, we are
+ * holding @ubi->move_mutex and go sleep on the LEB lock. So, if the
+ * LEB is already locked, we just do not move it and return %1.
+ */
+ err = leb_write_trylock(ubi, vol_id, lnum);
+ if (err) {
+ dbg_eba("contention on LEB %d:%d, cancel", vol_id, lnum);
+ return err;
+ }
+
+ /*
+ * The LEB might have been put meanwhile, and the task which put it is
+ * probably waiting on @ubi->move_mutex. No need to continue the work,
+ * cancel it.
+ */
+ if (vol->eba_tbl[lnum] != from) {
+ dbg_eba("LEB %d:%d is no longer mapped to PEB %d, mapped to "
+ "PEB %d, cancel", vol_id, lnum, from,
+ vol->eba_tbl[lnum]);
+ err = 1;
+ goto out_unlock_leb;
+ }
+
+ /*
+ * OK, now the LEB is locked and we can safely start moving iy. Since
+ * this function utilizes thie @ubi->peb1_buf buffer which is shared
+ * with some other functions, so lock the buffer by taking the
+ * @ubi->buf_mutex.
+ */
+ mutex_lock(&ubi->buf_mutex);
+ dbg_eba("read %d bytes of data", aldata_size);
+ err = ubi_io_read_data(ubi, ubi->peb_buf1, from, 0, aldata_size);
+ if (err && err != UBI_IO_BITFLIPS) {
+ ubi_warn("error %d while reading data from PEB %d",
+ err, from);
+ goto out_unlock_buf;
+ }
+
+ /*
+ * Now we have got to calculate how much data we have to to copy. In
+ * case of a static volume it is fairly easy - the VID header contains
+ * the data size. In case of a dynamic volume it is more difficult - we
+ * have to read the contents, cut 0xFF bytes from the end and copy only
+ * the first part. We must do this to avoid writing 0xFF bytes as it
+ * may have some side-effects. And not only this. It is important not
+ * to include those 0xFFs to CRC because later the they may be filled
+ * by data.
+ */
+ if (vid_hdr->vol_type == UBI_VID_DYNAMIC)
+ aldata_size = data_size =
+ ubi_calc_data_len(ubi, ubi->peb_buf1, data_size);
+
+ cond_resched();
+ crc = crc32(UBI_CRC32_INIT, ubi->peb_buf1, data_size);
+ cond_resched();
+
+ /*
+ * It may turn out to me that the whole @from physical eraseblock
+ * contains only 0xFF bytes. Then we have to only write the VID header
+ * and do not write any data. This also means we should not set
+ * @vid_hdr->copy_flag, @vid_hdr->data_size, and @vid_hdr->data_crc.
+ */
+ if (data_size > 0) {
+ vid_hdr->copy_flag = 1;
+ vid_hdr->data_size = cpu_to_be32(data_size);
+ vid_hdr->data_crc = cpu_to_be32(crc);
+ }
+ vid_hdr->sqnum = cpu_to_be64(next_sqnum(ubi));
+
+ err = ubi_io_write_vid_hdr(ubi, to, vid_hdr);
+ if (err)
+ goto out_unlock_buf;
+
+ cond_resched();
+
+ /* Read the VID header back and check if it was written correctly */
+ err = ubi_io_read_vid_hdr(ubi, to, vid_hdr, 1);
+ if (err) {
+ if (err != UBI_IO_BITFLIPS)
+ ubi_warn("cannot read VID header back from PEB %d", to);
+ else
+ err = 1;
+ goto out_unlock_buf;
+ }
+
+ if (data_size > 0) {
+ err = ubi_io_write_data(ubi, ubi->peb_buf1, to, 0, aldata_size);
+ if (err)
+ goto out_unlock_buf;
+
+ cond_resched();
+
+ /*
+ * We've written the data and are going to read it back to make
+ * sure it was written correctly.
+ */
+
+ err = ubi_io_read_data(ubi, ubi->peb_buf2, to, 0, aldata_size);
+ if (err) {
+ if (err != UBI_IO_BITFLIPS)
+ ubi_warn("cannot read data back from PEB %d",
+ to);
+ else
+ err = 1;
+ goto out_unlock_buf;
+ }
+
+ cond_resched();
+
+ if (memcmp(ubi->peb_buf1, ubi->peb_buf2, aldata_size)) {
+ ubi_warn("read data back from PEB %d - it is different",
+ to);
+ goto out_unlock_buf;
+ }
+ }
+
+ ubi_assert(vol->eba_tbl[lnum] == from);
+ vol->eba_tbl[lnum] = to;
+
+out_unlock_buf:
+ mutex_unlock(&ubi->buf_mutex);
+out_unlock_leb:
+ leb_write_unlock(ubi, vol_id, lnum);
+ return err;
+}
+
+/**
+ * ubi_eba_init_scan - initialize the EBA unit using scanning information.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+int ubi_eba_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si)
+{
+ int i, j, err, num_volumes;
+ struct ubi_scan_volume *sv;
+ struct ubi_volume *vol;
+ struct ubi_scan_leb *seb;
+ struct rb_node *rb;
+
+ dbg_eba("initialize EBA unit");
+
+ spin_lock_init(&ubi->ltree_lock);
+ mutex_init(&ubi->alc_mutex);
+ ubi->ltree = RB_ROOT;
+
+ ubi->global_sqnum = si->max_sqnum + 1;
+ num_volumes = ubi->vtbl_slots + UBI_INT_VOL_COUNT;
+
+ for (i = 0; i < num_volumes; i++) {
+ vol = ubi->volumes[i];
+ if (!vol)
+ continue;
+
+ cond_resched();
+
+ vol->eba_tbl = kmalloc(vol->reserved_pebs * sizeof(int),
+ GFP_KERNEL);
+ if (!vol->eba_tbl) {
+ err = -ENOMEM;
+ goto out_free;
+ }
+
+ for (j = 0; j < vol->reserved_pebs; j++)
+ vol->eba_tbl[j] = UBI_LEB_UNMAPPED;
+
+ sv = ubi_scan_find_sv(si, idx2vol_id(ubi, i));
+ if (!sv)
+ continue;
+
+ ubi_rb_for_each_entry(rb, seb, &sv->root, u.rb) {
+ if (seb->lnum >= vol->reserved_pebs)
+ /*
+ * This may happen in case of an unclean reboot
+ * during re-size.
+ */
+ ubi_scan_move_to_list(sv, seb, &si->erase);
+ vol->eba_tbl[seb->lnum] = seb->pnum;
+ }
+ }
+
+ if (ubi->avail_pebs < EBA_RESERVED_PEBS) {
+ ubi_err("no enough physical eraseblocks (%d, need %d)",
+ ubi->avail_pebs, EBA_RESERVED_PEBS);
+ err = -ENOSPC;
+ goto out_free;
+ }
+ ubi->avail_pebs -= EBA_RESERVED_PEBS;
+ ubi->rsvd_pebs += EBA_RESERVED_PEBS;
+
+ if (ubi->bad_allowed) {
+ ubi_calculate_reserved(ubi);
+
+ if (ubi->avail_pebs < ubi->beb_rsvd_level) {
+ /* No enough free physical eraseblocks */
+ ubi->beb_rsvd_pebs = ubi->avail_pebs;
+ ubi_warn("cannot reserve enough PEBs for bad PEB "
+ "handling, reserved %d, need %d",
+ ubi->beb_rsvd_pebs, ubi->beb_rsvd_level);
+ } else
+ ubi->beb_rsvd_pebs = ubi->beb_rsvd_level;
+
+ ubi->avail_pebs -= ubi->beb_rsvd_pebs;
+ ubi->rsvd_pebs += ubi->beb_rsvd_pebs;
+ }
+
+ dbg_eba("EBA unit is initialized");
+ return 0;
+
+out_free:
+ for (i = 0; i < num_volumes; i++) {
+ if (!ubi->volumes[i])
+ continue;
+ kfree(ubi->volumes[i]->eba_tbl);
+ }
+ return err;
+}
+
+/**
+ * ubi_eba_close - close EBA unit.
+ * @ubi: UBI device description object
+ */
+void ubi_eba_close(const struct ubi_device *ubi)
+{
+ int i, num_volumes = ubi->vtbl_slots + UBI_INT_VOL_COUNT;
+
+ dbg_eba("close EBA unit");
+
+ for (i = 0; i < num_volumes; i++) {
+ if (!ubi->volumes[i])
+ continue;
+ kfree(ubi->volumes[i]->eba_tbl);
+ }
+}
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c
new file mode 100644
index 0000000..96d2772
--- /dev/null
+++ b/drivers/mtd/ubi/io.c
@@ -0,0 +1,1274 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ * Copyright (c) Nokia Corporation, 2006, 2007
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+/*
+ * UBI input/output unit.
+ *
+ * This unit provides a uniform way to work with all kinds of the underlying
+ * MTD devices. It also implements handy functions for reading and writing UBI
+ * headers.
+ *
+ * We are trying to have a paranoid mindset and not to trust to what we read
+ * from the flash media in order to be more secure and robust. So this unit
+ * validates every single header it reads from the flash media.
+ *
+ * Some words about how the eraseblock headers are stored.
+ *
+ * The erase counter header is always stored at offset zero. By default, the
+ * VID header is stored after the EC header at the closest aligned offset
+ * (i.e. aligned to the minimum I/O unit size). Data starts next to the VID
+ * header at the closest aligned offset. But this default layout may be
+ * changed. For example, for different reasons (e.g., optimization) UBI may be
+ * asked to put the VID header at further offset, and even at an unaligned
+ * offset. Of course, if the offset of the VID header is unaligned, UBI adds
+ * proper padding in front of it. Data offset may also be changed but it has to
+ * be aligned.
+ *
+ * About minimal I/O units. In general, UBI assumes flash device model where
+ * there is only one minimal I/O unit size. E.g., in case of NOR flash it is 1,
+ * in case of NAND flash it is a NAND page, etc. This is reported by MTD in the
+ * @ubi->mtd->writesize field. But as an exception, UBI admits of using another
+ * (smaller) minimal I/O unit size for EC and VID headers to make it possible
+ * to do different optimizations.
+ *
+ * This is extremely useful in case of NAND flashes which admit of several
+ * write operations to one NAND page. In this case UBI can fit EC and VID
+ * headers at one NAND page. Thus, UBI may use "sub-page" size as the minimal
+ * I/O unit for the headers (the @ubi->hdrs_min_io_size field). But it still
+ * reports NAND page size (@ubi->min_io_size) as a minimal I/O unit for the UBI
+ * users.
+ *
+ * Example: some Samsung NANDs with 2KiB pages allow 4x 512-byte writes, so
+ * although the minimal I/O unit is 2K, UBI uses 512 bytes for EC and VID
+ * headers.
+ *
+ * Q: why not just to treat sub-page as a minimal I/O unit of this flash
+ * device, e.g., make @ubi->min_io_size = 512 in the example above?
+ *
+ * A: because when writing a sub-page, MTD still writes a full 2K page but the
+ * bytes which are no relevant to the sub-page are 0xFF. So, basically, writing
+ * 4x512 sub-pages is 4 times slower then writing one 2KiB NAND page. Thus, we
+ * prefer to use sub-pages only for EV and VID headers.
+ *
+ * As it was noted above, the VID header may start at a non-aligned offset.
+ * For example, in case of a 2KiB page NAND flash with a 512 bytes sub-page,
+ * the VID header may reside at offset 1984 which is the last 64 bytes of the
+ * last sub-page (EC header is always at offset zero). This causes some
+ * difficulties when reading and writing VID headers.
+ *
+ * Suppose we have a 64-byte buffer and we read a VID header at it. We change
+ * the data and want to write this VID header out. As we can only write in
+ * 512-byte chunks, we have to allocate one more buffer and copy our VID header
+ * to offset 448 of this buffer.
+ *
+ * The I/O unit does the following trick in order to avoid this extra copy.
+ * It always allocates a @ubi->vid_hdr_alsize bytes buffer for the VID header
+ * and returns a pointer to offset @ubi->vid_hdr_shift of this buffer. When the
+ * VID header is being written out, it shifts the VID header pointer back and
+ * writes the whole sub-page.
+ */
+
+#ifdef UBI_LINUX
+#include <linux/crc32.h>
+#include <linux/err.h>
+#endif
+
+#include "ubi-barebox.h"
+#include "ubi.h"
+
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
+static int paranoid_check_not_bad(const struct ubi_device *ubi, int pnum);
+static int paranoid_check_peb_ec_hdr(const struct ubi_device *ubi, int pnum);
+static int paranoid_check_ec_hdr(const struct ubi_device *ubi, int pnum,
+ const struct ubi_ec_hdr *ec_hdr);
+static int paranoid_check_peb_vid_hdr(const struct ubi_device *ubi, int pnum);
+static int paranoid_check_vid_hdr(const struct ubi_device *ubi, int pnum,
+ const struct ubi_vid_hdr *vid_hdr);
+static int paranoid_check_all_ff(struct ubi_device *ubi, int pnum, int offset,
+ int len);
+#else
+#define paranoid_check_not_bad(ubi, pnum) 0
+#define paranoid_check_peb_ec_hdr(ubi, pnum) 0
+#define paranoid_check_ec_hdr(ubi, pnum, ec_hdr) 0
+#define paranoid_check_peb_vid_hdr(ubi, pnum) 0
+#define paranoid_check_vid_hdr(ubi, pnum, vid_hdr) 0
+#define paranoid_check_all_ff(ubi, pnum, offset, len) 0
+#endif
+
+/**
+ * ubi_io_read - read data from a physical eraseblock.
+ * @ubi: UBI device description object
+ * @buf: buffer where to store the read data
+ * @pnum: physical eraseblock number to read from
+ * @offset: offset within the physical eraseblock from where to read
+ * @len: how many bytes to read
+ *
+ * This function reads data from offset @offset of physical eraseblock @pnum
+ * and stores the read data in the @buf buffer. The following return codes are
+ * possible:
+ *
+ * o %0 if all the requested data were successfully read;
+ * o %UBI_IO_BITFLIPS if all the requested data were successfully read, but
+ * correctable bit-flips were detected; this is harmless but may indicate
+ * that this eraseblock may become bad soon (but do not have to);
+ * o %-EBADMSG if the MTD subsystem reported about data integrity problems, for
+ * example it can be an ECC error in case of NAND; this most probably means
+ * that the data is corrupted;
+ * o %-EIO if some I/O error occurred;
+ * o other negative error codes in case of other errors.
+ */
+int ubi_io_read(const struct ubi_device *ubi, void *buf, int pnum, int offset,
+ int len)
+{
+ int err, retries = 0;
+ size_t read;
+ loff_t addr;
+
+ dbg_io("read %d bytes from PEB %d:%d", len, pnum, offset);
+
+ ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
+ ubi_assert(offset >= 0 && offset + len <= ubi->peb_size);
+ ubi_assert(len > 0);
+
+ err = paranoid_check_not_bad(ubi, pnum);
+ if (err)
+ return err > 0 ? -EINVAL : err;
+
+ addr = (loff_t)pnum * ubi->peb_size + offset;
+retry:
+ err = ubi->mtd->read(ubi->mtd, addr, len, &read, buf);
+ if (err) {
+ if (err == -EUCLEAN) {
+ /*
+ * -EUCLEAN is reported if there was a bit-flip which
+ * was corrected, so this is harmless.
+ */
+ ubi_msg("fixable bit-flip detected at PEB %d", pnum);
+ ubi_assert(len == read);
+ return UBI_IO_BITFLIPS;
+ }
+
+ if (read != len && retries++ < UBI_IO_RETRIES) {
+ dbg_io("error %d while reading %d bytes from PEB %d:%d, "
+ "read only %zd bytes, retry",
+ err, len, pnum, offset, read);
+ yield();
+ goto retry;
+ }
+
+ ubi_err("error %d while reading %d bytes from PEB %d:%d, "
+ "read %zd bytes", err, len, pnum, offset, read);
+ ubi_dbg_dump_stack();
+
+ /*
+ * The driver should never return -EBADMSG if it failed to read
+ * all the requested data. But some buggy drivers might do
+ * this, so we change it to -EIO.
+ */
+ if (read != len && err == -EBADMSG) {
+ ubi_assert(0);
+ printk("%s[%d] not here\n", __func__, __LINE__);
+/* err = -EIO; */
+ }
+ } else {
+ ubi_assert(len == read);
+
+ if (ubi_dbg_is_bitflip()) {
+ dbg_msg("bit-flip (emulated)");
+ err = UBI_IO_BITFLIPS;
+ }
+ }
+
+ return err;
+}
+
+/**
+ * ubi_io_write - write data to a physical eraseblock.
+ * @ubi: UBI device description object
+ * @buf: buffer with the data to write
+ * @pnum: physical eraseblock number to write to
+ * @offset: offset within the physical eraseblock where to write
+ * @len: how many bytes to write
+ *
+ * This function writes @len bytes of data from buffer @buf to offset @offset
+ * of physical eraseblock @pnum. If all the data were successfully written,
+ * zero is returned. If an error occurred, this function returns a negative
+ * error code. If %-EIO is returned, the physical eraseblock most probably went
+ * bad.
+ *
+ * Note, in case of an error, it is possible that something was still written
+ * to the flash media, but may be some garbage.
+ */
+int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
+ int len)
+{
+ int err;
+ size_t written;
+ loff_t addr;
+
+ dbg_io("write %d bytes to PEB %d:%d", len, pnum, offset);
+
+ ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
+ ubi_assert(offset >= 0 && offset + len <= ubi->peb_size);
+ ubi_assert(offset % ubi->hdrs_min_io_size == 0);
+ ubi_assert(len > 0 && len % ubi->hdrs_min_io_size == 0);
+
+ if (ubi->ro_mode) {
+ ubi_err("read-only mode");
+ return -EROFS;
+ }
+
+ /* The below has to be compiled out if paranoid checks are disabled */
+
+ err = paranoid_check_not_bad(ubi, pnum);
+ if (err)
+ return err > 0 ? -EINVAL : err;
+
+ /* The area we are writing to has to contain all 0xFF bytes */
+ err = paranoid_check_all_ff(ubi, pnum, offset, len);
+ if (err)
+ return err > 0 ? -EINVAL : err;
+
+ if (offset >= ubi->leb_start) {
+ /*
+ * We write to the data area of the physical eraseblock. Make
+ * sure it has valid EC and VID headers.
+ */
+ err = paranoid_check_peb_ec_hdr(ubi, pnum);
+ if (err)
+ return err > 0 ? -EINVAL : err;
+ err = paranoid_check_peb_vid_hdr(ubi, pnum);
+ if (err)
+ return err > 0 ? -EINVAL : err;
+ }
+
+ if (ubi_dbg_is_write_failure()) {
+ dbg_err("cannot write %d bytes to PEB %d:%d "
+ "(emulated)", len, pnum, offset);
+ ubi_dbg_dump_stack();
+ return -EIO;
+ }
+
+ addr = (loff_t)pnum * ubi->peb_size + offset;
+ err = ubi->mtd->write(ubi->mtd, addr, len, &written, buf);
+ if (err) {
+ ubi_err("error %d while writing %d bytes to PEB %d:%d, written"
+ " %zd bytes", err, len, pnum, offset, written);
+ ubi_dbg_dump_stack();
+ } else
+ ubi_assert(written == len);
+
+ return err;
+}
+
+/**
+ * erase_callback - MTD erasure call-back.
+ * @ei: MTD erase information object.
+ *
+ * Note, even though MTD erase interface is asynchronous, all the current
+ * implementations are synchronous anyway.
+ */
+static void erase_callback(struct erase_info *ei)
+{
+ wake_up_interruptible((wait_queue_head_t *)ei->priv);
+}
+
+/**
+ * do_sync_erase - synchronously erase a physical eraseblock.
+ * @ubi: UBI device description object
+ * @pnum: the physical eraseblock number to erase
+ *
+ * This function synchronously erases physical eraseblock @pnum and returns
+ * zero in case of success and a negative error code in case of failure. If
+ * %-EIO is returned, the physical eraseblock most probably went bad.
+ */
+static int do_sync_erase(struct ubi_device *ubi, int pnum)
+{
+ int err, retries = 0;
+ struct erase_info ei;
+ wait_queue_head_t wq;
+
+ dbg_io("erase PEB %d", pnum);
+
+retry:
+ init_waitqueue_head(&wq);
+ memset(&ei, 0, sizeof(struct erase_info));
+
+ ei.mtd = ubi->mtd;
+ ei.addr = (loff_t)pnum * ubi->peb_size;
+ ei.len = ubi->peb_size;
+ ei.callback = erase_callback;
+ ei.priv = (unsigned long)&wq;
+
+ err = ubi->mtd->erase(ubi->mtd, &ei);
+ if (err) {
+ if (retries++ < UBI_IO_RETRIES) {
+ dbg_io("error %d while erasing PEB %d, retry",
+ err, pnum);
+ yield();
+ goto retry;
+ }
+ ubi_err("cannot erase PEB %d, error %d", pnum, err);
+ ubi_dbg_dump_stack();
+ return err;
+ }
+
+ err = wait_event_interruptible(wq, ei.state == MTD_ERASE_DONE ||
+ ei.state == MTD_ERASE_FAILED);
+ if (err) {
+ ubi_err("interrupted PEB %d erasure", pnum);
+ return -EINTR;
+ }
+
+ if (ei.state == MTD_ERASE_FAILED) {
+ if (retries++ < UBI_IO_RETRIES) {
+ dbg_io("error while erasing PEB %d, retry", pnum);
+ yield();
+ goto retry;
+ }
+ ubi_err("cannot erase PEB %d", pnum);
+ ubi_dbg_dump_stack();
+ return -EIO;
+ }
+
+ err = paranoid_check_all_ff(ubi, pnum, 0, ubi->peb_size);
+ if (err)
+ return err > 0 ? -EINVAL : err;
+
+ if (ubi_dbg_is_erase_failure() && !err) {
+ dbg_err("cannot erase PEB %d (emulated)", pnum);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/**
+ * check_pattern - check if buffer contains only a certain byte pattern.
+ * @buf: buffer to check
+ * @patt: the pattern to check
+ * @size: buffer size in bytes
+ *
+ * This function returns %1 in there are only @patt bytes in @buf, and %0 if
+ * something else was also found.
+ */
+static int check_pattern(const void *buf, uint8_t patt, int size)
+{
+ int i;
+
+ for (i = 0; i < size; i++)
+ if (((const uint8_t *)buf)[i] != patt)
+ return 0;
+ return 1;
+}
+
+/* Patterns to write to a physical eraseblock when torturing it */
+static uint8_t patterns[] = {0xa5, 0x5a, 0x0};
+
+/**
+ * torture_peb - test a supposedly bad physical eraseblock.
+ * @ubi: UBI device description object
+ * @pnum: the physical eraseblock number to test
+ *
+ * This function returns %-EIO if the physical eraseblock did not pass the
+ * test, a positive number of erase operations done if the test was
+ * successfully passed, and other negative error codes in case of other errors.
+ */
+static int torture_peb(struct ubi_device *ubi, int pnum)
+{
+ int err, i, patt_count;
+
+ patt_count = ARRAY_SIZE(patterns);
+ ubi_assert(patt_count > 0);
+
+ mutex_lock(&ubi->buf_mutex);
+ for (i = 0; i < patt_count; i++) {
+ err = do_sync_erase(ubi, pnum);
+ if (err)
+ goto out;
+
+ /* Make sure the PEB contains only 0xFF bytes */
+ err = ubi_io_read(ubi, ubi->peb_buf1, pnum, 0, ubi->peb_size);
+ if (err)
+ goto out;
+
+ err = check_pattern(ubi->peb_buf1, 0xFF, ubi->peb_size);
+ if (err == 0) {
+ ubi_err("erased PEB %d, but a non-0xFF byte found",
+ pnum);
+ err = -EIO;
+ goto out;
+ }
+
+ /* Write a pattern and check it */
+ memset(ubi->peb_buf1, patterns[i], ubi->peb_size);
+ err = ubi_io_write(ubi, ubi->peb_buf1, pnum, 0, ubi->peb_size);
+ if (err)
+ goto out;
+
+ memset(ubi->peb_buf1, ~patterns[i], ubi->peb_size);
+ err = ubi_io_read(ubi, ubi->peb_buf1, pnum, 0, ubi->peb_size);
+ if (err)
+ goto out;
+
+ err = check_pattern(ubi->peb_buf1, patterns[i], ubi->peb_size);
+ if (err == 0) {
+ ubi_err("pattern %x checking failed for PEB %d",
+ patterns[i], pnum);
+ err = -EIO;
+ goto out;
+ }
+ }
+
+ err = patt_count;
+
+out:
+ mutex_unlock(&ubi->buf_mutex);
+ if (err == UBI_IO_BITFLIPS || err == -EBADMSG) {
+ /*
+ * If a bit-flip or data integrity error was detected, the test
+ * has not passed because it happened on a freshly erased
+ * physical eraseblock which means something is wrong with it.
+ */
+ ubi_err("read problems on freshly erased PEB %d, must be bad",
+ pnum);
+ err = -EIO;
+ }
+ return err;
+}
+
+/**
+ * ubi_io_sync_erase - synchronously erase a physical eraseblock.
+ * @ubi: UBI device description object
+ * @pnum: physical eraseblock number to erase
+ * @torture: if this physical eraseblock has to be tortured
+ *
+ * This function synchronously erases physical eraseblock @pnum. If @torture
+ * flag is not zero, the physical eraseblock is checked by means of writing
+ * different patterns to it and reading them back. If the torturing is enabled,
+ * the physical eraseblock is erased more then once.
+ *
+ * This function returns the number of erasures made in case of success, %-EIO
+ * if the erasure failed or the torturing test failed, and other negative error
+ * codes in case of other errors. Note, %-EIO means that the physical
+ * eraseblock is bad.
+ */
+int ubi_io_sync_erase(struct ubi_device *ubi, int pnum, int torture)
+{
+ int err, ret = 0;
+
+ ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
+
+ err = paranoid_check_not_bad(ubi, pnum);
+ if (err != 0)
+ return err > 0 ? -EINVAL : err;
+
+ if (ubi->ro_mode) {
+ ubi_err("read-only mode");
+ return -EROFS;
+ }
+
+ if (torture) {
+ ret = torture_peb(ubi, pnum);
+ if (ret < 0)
+ return ret;
+ }
+
+ err = do_sync_erase(ubi, pnum);
+ if (err)
+ return err;
+
+ return ret + 1;
+}
+
+/**
+ * ubi_io_is_bad - check if a physical eraseblock is bad.
+ * @ubi: UBI device description object
+ * @pnum: the physical eraseblock number to check
+ *
+ * This function returns a positive number if the physical eraseblock is bad,
+ * zero if not, and a negative error code if an error occurred.
+ */
+int ubi_io_is_bad(const struct ubi_device *ubi, int pnum)
+{
+ struct mtd_info *mtd = ubi->mtd;
+
+ ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
+
+ if (ubi->bad_allowed) {
+ int ret;
+
+ ret = mtd->block_isbad(mtd, (loff_t)pnum * ubi->peb_size);
+ if (ret < 0)
+ ubi_err("error %d while checking if PEB %d is bad",
+ ret, pnum);
+ else if (ret)
+ dbg_io("PEB %d is bad", pnum);
+ return ret;
+ }
+
+ return 0;
+}
+
+/**
+ * ubi_io_mark_bad - mark a physical eraseblock as bad.
+ * @ubi: UBI device description object
+ * @pnum: the physical eraseblock number to mark
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+int ubi_io_mark_bad(const struct ubi_device *ubi, int pnum)
+{
+ int err;
+ struct mtd_info *mtd = ubi->mtd;
+
+ ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
+
+ if (ubi->ro_mode) {
+ ubi_err("read-only mode");
+ return -EROFS;
+ }
+
+ if (!ubi->bad_allowed)
+ return 0;
+
+ err = mtd->block_markbad(mtd, (loff_t)pnum * ubi->peb_size);
+ if (err)
+ ubi_err("cannot mark PEB %d bad, error %d", pnum, err);
+ return err;
+}
+
+/**
+ * validate_ec_hdr - validate an erase counter header.
+ * @ubi: UBI device description object
+ * @ec_hdr: the erase counter header to check
+ *
+ * This function returns zero if the erase counter header is OK, and %1 if
+ * not.
+ */
+static int validate_ec_hdr(const struct ubi_device *ubi,
+ const struct ubi_ec_hdr *ec_hdr)
+{
+ long long ec;
+ int vid_hdr_offset, leb_start;
+
+ ec = be64_to_cpu(ec_hdr->ec);
+ vid_hdr_offset = be32_to_cpu(ec_hdr->vid_hdr_offset);
+ leb_start = be32_to_cpu(ec_hdr->data_offset);
+
+ if (ec_hdr->version != UBI_VERSION) {
+ ubi_err("node with incompatible UBI version found: "
+ "this UBI version is %d, image version is %d",
+ UBI_VERSION, (int)ec_hdr->version);
+ goto bad;
+ }
+
+ if (vid_hdr_offset != ubi->vid_hdr_offset) {
+ ubi_err("bad VID header offset %d, expected %d",
+ vid_hdr_offset, ubi->vid_hdr_offset);
+ goto bad;
+ }
+
+ if (leb_start != ubi->leb_start) {
+ ubi_err("bad data offset %d, expected %d",
+ leb_start, ubi->leb_start);
+ goto bad;
+ }
+
+ if (ec < 0 || ec > UBI_MAX_ERASECOUNTER) {
+ ubi_err("bad erase counter %lld", ec);
+ goto bad;
+ }
+
+ return 0;
+
+bad:
+ ubi_err("bad EC header");
+ ubi_dbg_dump_ec_hdr(ec_hdr);
+ ubi_dbg_dump_stack();
+ return 1;
+}
+
+/**
+ * ubi_io_read_ec_hdr - read and check an erase counter header.
+ * @ubi: UBI device description object
+ * @pnum: physical eraseblock to read from
+ * @ec_hdr: a &struct ubi_ec_hdr object where to store the read erase counter
+ * header
+ * @verbose: be verbose if the header is corrupted or was not found
+ *
+ * This function reads erase counter header from physical eraseblock @pnum and
+ * stores it in @ec_hdr. This function also checks CRC checksum of the read
+ * erase counter header. The following codes may be returned:
+ *
+ * o %0 if the CRC checksum is correct and the header was successfully read;
+ * o %UBI_IO_BITFLIPS if the CRC is correct, but bit-flips were detected
+ * and corrected by the flash driver; this is harmless but may indicate that
+ * this eraseblock may become bad soon (but may be not);
+ * o %UBI_IO_BAD_EC_HDR if the erase counter header is corrupted (a CRC error);
+ * o %UBI_IO_PEB_EMPTY if the physical eraseblock is empty;
+ * o a negative error code in case of failure.
+ */
+int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
+ struct ubi_ec_hdr *ec_hdr, int verbose)
+{
+ int err, read_err = 0;
+ uint32_t crc, magic, hdr_crc;
+
+ dbg_io("read EC header from PEB %d", pnum);
+ ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
+ if (UBI_IO_DEBUG)
+ verbose = 1;
+
+ err = ubi_io_read(ubi, ec_hdr, pnum, 0, UBI_EC_HDR_SIZE);
+ if (err) {
+ if (err != UBI_IO_BITFLIPS && err != -EBADMSG)
+ return err;
+
+ /*
+ * We read all the data, but either a correctable bit-flip
+ * occurred, or MTD reported about some data integrity error,
+ * like an ECC error in case of NAND. The former is harmless,
+ * the later may mean that the read data is corrupted. But we
+ * have a CRC check-sum and we will detect this. If the EC
+ * header is still OK, we just report this as there was a
+ * bit-flip.
+ */
+ read_err = err;
+ }
+
+ magic = be32_to_cpu(ec_hdr->magic);
+ if (magic != UBI_EC_HDR_MAGIC) {
+ /*
+ * The magic field is wrong. Let's check if we have read all
+ * 0xFF. If yes, this physical eraseblock is assumed to be
+ * empty.
+ *
+ * But if there was a read error, we do not test it for all
+ * 0xFFs. Even if it does contain all 0xFFs, this error
+ * indicates that something is still wrong with this physical
+ * eraseblock and we anyway cannot treat it as empty.
+ */
+ if (read_err != -EBADMSG &&
+ check_pattern(ec_hdr, 0xFF, UBI_EC_HDR_SIZE)) {
+ /* The physical eraseblock is supposedly empty */
+
+ /*
+ * The below is just a paranoid check, it has to be
+ * compiled out if paranoid checks are disabled.
+ */
+ err = paranoid_check_all_ff(ubi, pnum, 0,
+ ubi->peb_size);
+ if (err)
+ return err > 0 ? UBI_IO_BAD_EC_HDR : err;
+
+ if (verbose)
+ ubi_warn("no EC header found at PEB %d, "
+ "only 0xFF bytes", pnum);
+ return UBI_IO_PEB_EMPTY;
+ }
+
+ /*
+ * This is not a valid erase counter header, and these are not
+ * 0xFF bytes. Report that the header is corrupted.
+ */
+ if (verbose) {
+ ubi_warn("bad magic number at PEB %d: %08x instead of "
+ "%08x", pnum, magic, UBI_EC_HDR_MAGIC);
+ ubi_dbg_dump_ec_hdr(ec_hdr);
+ }
+ return UBI_IO_BAD_EC_HDR;
+ }
+
+ crc = crc32(UBI_CRC32_INIT, ec_hdr, UBI_EC_HDR_SIZE_CRC);
+ hdr_crc = be32_to_cpu(ec_hdr->hdr_crc);
+
+ if (hdr_crc != crc) {
+ if (verbose) {
+ ubi_warn("bad EC header CRC at PEB %d, calculated %#08x,"
+ " read %#08x", pnum, crc, hdr_crc);
+ ubi_dbg_dump_ec_hdr(ec_hdr);
+ }
+ return UBI_IO_BAD_EC_HDR;
+ }
+
+ /* And of course validate what has just been read from the media */
+ err = validate_ec_hdr(ubi, ec_hdr);
+ if (err) {
+ ubi_err("validation failed for PEB %d", pnum);
+ return -EINVAL;
+ }
+
+ return read_err ? UBI_IO_BITFLIPS : 0;
+}
+
+/**
+ * ubi_io_write_ec_hdr - write an erase counter header.
+ * @ubi: UBI device description object
+ * @pnum: physical eraseblock to write to
+ * @ec_hdr: the erase counter header to write
+ *
+ * This function writes erase counter header described by @ec_hdr to physical
+ * eraseblock @pnum. It also fills most fields of @ec_hdr before writing, so
+ * the caller do not have to fill them. Callers must only fill the @ec_hdr->ec
+ * field.
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure. If %-EIO is returned, the physical eraseblock most probably
+ * went bad.
+ */
+int ubi_io_write_ec_hdr(struct ubi_device *ubi, int pnum,
+ struct ubi_ec_hdr *ec_hdr)
+{
+ int err;
+ uint32_t crc;
+
+ dbg_io("write EC header to PEB %d", pnum);
+ ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
+
+ ec_hdr->magic = cpu_to_be32(UBI_EC_HDR_MAGIC);
+ ec_hdr->version = UBI_VERSION;
+ ec_hdr->vid_hdr_offset = cpu_to_be32(ubi->vid_hdr_offset);
+ ec_hdr->data_offset = cpu_to_be32(ubi->leb_start);
+ crc = crc32(UBI_CRC32_INIT, ec_hdr, UBI_EC_HDR_SIZE_CRC);
+ ec_hdr->hdr_crc = cpu_to_be32(crc);
+
+ err = paranoid_check_ec_hdr(ubi, pnum, ec_hdr);
+ if (err)
+ return -EINVAL;
+
+ err = ubi_io_write(ubi, ec_hdr, pnum, 0, ubi->ec_hdr_alsize);
+ return err;
+}
+
+/**
+ * validate_vid_hdr - validate a volume identifier header.
+ * @ubi: UBI device description object
+ * @vid_hdr: the volume identifier header to check
+ *
+ * This function checks that data stored in the volume identifier header
+ * @vid_hdr. Returns zero if the VID header is OK and %1 if not.
+ */
+static int validate_vid_hdr(const struct ubi_device *ubi,
+ const struct ubi_vid_hdr *vid_hdr)
+{
+ int vol_type = vid_hdr->vol_type;
+ int copy_flag = vid_hdr->copy_flag;
+ int vol_id = be32_to_cpu(vid_hdr->vol_id);
+ int lnum = be32_to_cpu(vid_hdr->lnum);
+ int compat = vid_hdr->compat;
+ int data_size = be32_to_cpu(vid_hdr->data_size);
+ int used_ebs = be32_to_cpu(vid_hdr->used_ebs);
+ int data_pad = be32_to_cpu(vid_hdr->data_pad);
+ int data_crc = be32_to_cpu(vid_hdr->data_crc);
+ int usable_leb_size = ubi->leb_size - data_pad;
+
+ if (copy_flag != 0 && copy_flag != 1) {
+ dbg_err("bad copy_flag");
+ goto bad;
+ }
+
+ if (vol_id < 0 || lnum < 0 || data_size < 0 || used_ebs < 0 ||
+ data_pad < 0) {
+ dbg_err("negative values");
+ goto bad;
+ }
+
+ if (vol_id >= UBI_MAX_VOLUMES && vol_id < UBI_INTERNAL_VOL_START) {
+ dbg_err("bad vol_id");
+ goto bad;
+ }
+
+ if (vol_id < UBI_INTERNAL_VOL_START && compat != 0) {
+ dbg_err("bad compat");
+ goto bad;
+ }
+
+ if (vol_id >= UBI_INTERNAL_VOL_START && compat != UBI_COMPAT_DELETE &&
+ compat != UBI_COMPAT_RO && compat != UBI_COMPAT_PRESERVE &&
+ compat != UBI_COMPAT_REJECT) {
+ dbg_err("bad compat");
+ goto bad;
+ }
+
+ if (vol_type != UBI_VID_DYNAMIC && vol_type != UBI_VID_STATIC) {
+ dbg_err("bad vol_type");
+ goto bad;
+ }
+
+ if (data_pad >= ubi->leb_size / 2) {
+ dbg_err("bad data_pad");
+ goto bad;
+ }
+
+ if (vol_type == UBI_VID_STATIC) {
+ /*
+ * Although from high-level point of view static volumes may
+ * contain zero bytes of data, but no VID headers can contain
+ * zero at these fields, because they empty volumes do not have
+ * mapped logical eraseblocks.
+ */
+ if (used_ebs == 0) {
+ dbg_err("zero used_ebs");
+ goto bad;
+ }
+ if (data_size == 0) {
+ dbg_err("zero data_size");
+ goto bad;
+ }
+ if (lnum < used_ebs - 1) {
+ if (data_size != usable_leb_size) {
+ dbg_err("bad data_size");
+ goto bad;
+ }
+ } else if (lnum == used_ebs - 1) {
+ if (data_size == 0) {
+ dbg_err("bad data_size at last LEB");
+ goto bad;
+ }
+ } else {
+ dbg_err("too high lnum");
+ goto bad;
+ }
+ } else {
+ if (copy_flag == 0) {
+ if (data_crc != 0) {
+ dbg_err("non-zero data CRC");
+ goto bad;
+ }
+ if (data_size != 0) {
+ dbg_err("non-zero data_size");
+ goto bad;
+ }
+ } else {
+ if (data_size == 0) {
+ dbg_err("zero data_size of copy");
+ goto bad;
+ }
+ }
+ if (used_ebs != 0) {
+ dbg_err("bad used_ebs");
+ goto bad;
+ }
+ }
+
+ return 0;
+
+bad:
+ ubi_err("bad VID header");
+ ubi_dbg_dump_vid_hdr(vid_hdr);
+ ubi_dbg_dump_stack();
+ return 1;
+}
+
+/**
+ * ubi_io_read_vid_hdr - read and check a volume identifier header.
+ * @ubi: UBI device description object
+ * @pnum: physical eraseblock number to read from
+ * @vid_hdr: &struct ubi_vid_hdr object where to store the read volume
+ * identifier header
+ * @verbose: be verbose if the header is corrupted or wasn't found
+ *
+ * This function reads the volume identifier header from physical eraseblock
+ * @pnum and stores it in @vid_hdr. It also checks CRC checksum of the read
+ * volume identifier header. The following codes may be returned:
+ *
+ * o %0 if the CRC checksum is correct and the header was successfully read;
+ * o %UBI_IO_BITFLIPS if the CRC is correct, but bit-flips were detected
+ * and corrected by the flash driver; this is harmless but may indicate that
+ * this eraseblock may become bad soon;
+ * o %UBI_IO_BAD_VID_HRD if the volume identifier header is corrupted (a CRC
+ * error detected);
+ * o %UBI_IO_PEB_FREE if the physical eraseblock is free (i.e., there is no VID
+ * header there);
+ * o a negative error code in case of failure.
+ */
+int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
+ struct ubi_vid_hdr *vid_hdr, int verbose)
+{
+ int err, read_err = 0;
+ uint32_t crc, magic, hdr_crc;
+ void *p;
+
+ dbg_io("read VID header from PEB %d", pnum);
+ ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
+ if (UBI_IO_DEBUG)
+ verbose = 1;
+
+ p = (char *)vid_hdr - ubi->vid_hdr_shift;
+ err = ubi_io_read(ubi, p, pnum, ubi->vid_hdr_aloffset,
+ ubi->vid_hdr_alsize);
+ if (err) {
+ if (err != UBI_IO_BITFLIPS && err != -EBADMSG)
+ return err;
+
+ /*
+ * We read all the data, but either a correctable bit-flip
+ * occurred, or MTD reported about some data integrity error,
+ * like an ECC error in case of NAND. The former is harmless,
+ * the later may mean the read data is corrupted. But we have a
+ * CRC check-sum and we will identify this. If the VID header is
+ * still OK, we just report this as there was a bit-flip.
+ */
+ read_err = err;
+ }
+
+ magic = be32_to_cpu(vid_hdr->magic);
+ if (magic != UBI_VID_HDR_MAGIC) {
+ /*
+ * If we have read all 0xFF bytes, the VID header probably does
+ * not exist and the physical eraseblock is assumed to be free.
+ *
+ * But if there was a read error, we do not test the data for
+ * 0xFFs. Even if it does contain all 0xFFs, this error
+ * indicates that something is still wrong with this physical
+ * eraseblock and it cannot be regarded as free.
+ */
+ if (read_err != -EBADMSG &&
+ check_pattern(vid_hdr, 0xFF, UBI_VID_HDR_SIZE)) {
+ /* The physical eraseblock is supposedly free */
+
+ /*
+ * The below is just a paranoid check, it has to be
+ * compiled out if paranoid checks are disabled.
+ */
+ err = paranoid_check_all_ff(ubi, pnum, ubi->leb_start,
+ ubi->leb_size);
+ if (err)
+ return err > 0 ? UBI_IO_BAD_VID_HDR : err;
+
+ if (verbose)
+ ubi_warn("no VID header found at PEB %d, "
+ "only 0xFF bytes", pnum);
+ return UBI_IO_PEB_FREE;
+ }
+
+ /*
+ * This is not a valid VID header, and these are not 0xFF
+ * bytes. Report that the header is corrupted.
+ */
+ if (verbose) {
+ ubi_warn("bad magic number at PEB %d: %08x instead of "
+ "%08x", pnum, magic, UBI_VID_HDR_MAGIC);
+ ubi_dbg_dump_vid_hdr(vid_hdr);
+ }
+ return UBI_IO_BAD_VID_HDR;
+ }
+
+ crc = crc32(UBI_CRC32_INIT, vid_hdr, UBI_VID_HDR_SIZE_CRC);
+ hdr_crc = be32_to_cpu(vid_hdr->hdr_crc);
+
+ if (hdr_crc != crc) {
+ if (verbose) {
+ ubi_warn("bad CRC at PEB %d, calculated %#08x, "
+ "read %#08x", pnum, crc, hdr_crc);
+ ubi_dbg_dump_vid_hdr(vid_hdr);
+ }
+ return UBI_IO_BAD_VID_HDR;
+ }
+
+ /* Validate the VID header that we have just read */
+ err = validate_vid_hdr(ubi, vid_hdr);
+ if (err) {
+ ubi_err("validation failed for PEB %d", pnum);
+ return -EINVAL;
+ }
+
+ return read_err ? UBI_IO_BITFLIPS : 0;
+}
+
+/**
+ * ubi_io_write_vid_hdr - write a volume identifier header.
+ * @ubi: UBI device description object
+ * @pnum: the physical eraseblock number to write to
+ * @vid_hdr: the volume identifier header to write
+ *
+ * This function writes the volume identifier header described by @vid_hdr to
+ * physical eraseblock @pnum. This function automatically fills the
+ * @vid_hdr->magic and the @vid_hdr->version fields, as well as calculates
+ * header CRC checksum and stores it at vid_hdr->hdr_crc.
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure. If %-EIO is returned, the physical eraseblock probably went
+ * bad.
+ */
+int ubi_io_write_vid_hdr(struct ubi_device *ubi, int pnum,
+ struct ubi_vid_hdr *vid_hdr)
+{
+ int err;
+ uint32_t crc;
+ void *p;
+
+ dbg_io("write VID header to PEB %d", pnum);
+ ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
+
+ err = paranoid_check_peb_ec_hdr(ubi, pnum);
+ if (err)
+ return err > 0 ? -EINVAL: err;
+
+ vid_hdr->magic = cpu_to_be32(UBI_VID_HDR_MAGIC);
+ vid_hdr->version = UBI_VERSION;
+ crc = crc32(UBI_CRC32_INIT, vid_hdr, UBI_VID_HDR_SIZE_CRC);
+ vid_hdr->hdr_crc = cpu_to_be32(crc);
+
+ err = paranoid_check_vid_hdr(ubi, pnum, vid_hdr);
+ if (err)
+ return -EINVAL;
+
+ p = (char *)vid_hdr - ubi->vid_hdr_shift;
+ err = ubi_io_write(ubi, p, pnum, ubi->vid_hdr_aloffset,
+ ubi->vid_hdr_alsize);
+ return err;
+}
+
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
+
+/**
+ * paranoid_check_not_bad - ensure that a physical eraseblock is not bad.
+ * @ubi: UBI device description object
+ * @pnum: physical eraseblock number to check
+ *
+ * This function returns zero if the physical eraseblock is good, a positive
+ * number if it is bad and a negative error code if an error occurred.
+ */
+static int paranoid_check_not_bad(const struct ubi_device *ubi, int pnum)
+{
+ int err;
+
+ err = ubi_io_is_bad(ubi, pnum);
+ if (!err)
+ return err;
+
+ ubi_err("paranoid check failed for PEB %d", pnum);
+ ubi_dbg_dump_stack();
+ return err;
+}
+
+/**
+ * paranoid_check_ec_hdr - check if an erase counter header is all right.
+ * @ubi: UBI device description object
+ * @pnum: physical eraseblock number the erase counter header belongs to
+ * @ec_hdr: the erase counter header to check
+ *
+ * This function returns zero if the erase counter header contains valid
+ * values, and %1 if not.
+ */
+static int paranoid_check_ec_hdr(const struct ubi_device *ubi, int pnum,
+ const struct ubi_ec_hdr *ec_hdr)
+{
+ int err;
+ uint32_t magic;
+
+ magic = be32_to_cpu(ec_hdr->magic);
+ if (magic != UBI_EC_HDR_MAGIC) {
+ ubi_err("bad magic %#08x, must be %#08x",
+ magic, UBI_EC_HDR_MAGIC);
+ goto fail;
+ }
+
+ err = validate_ec_hdr(ubi, ec_hdr);
+ if (err) {
+ ubi_err("paranoid check failed for PEB %d", pnum);
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ ubi_dbg_dump_ec_hdr(ec_hdr);
+ ubi_dbg_dump_stack();
+ return 1;
+}
+
+/**
+ * paranoid_check_peb_ec_hdr - check that the erase counter header of a
+ * physical eraseblock is in-place and is all right.
+ * @ubi: UBI device description object
+ * @pnum: the physical eraseblock number to check
+ *
+ * This function returns zero if the erase counter header is all right, %1 if
+ * not, and a negative error code if an error occurred.
+ */
+static int paranoid_check_peb_ec_hdr(const struct ubi_device *ubi, int pnum)
+{
+ int err;
+ uint32_t crc, hdr_crc;
+ struct ubi_ec_hdr *ec_hdr;
+
+ ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_NOFS);
+ if (!ec_hdr)
+ return -ENOMEM;
+
+ err = ubi_io_read(ubi, ec_hdr, pnum, 0, UBI_EC_HDR_SIZE);
+ if (err && err != UBI_IO_BITFLIPS && err != -EBADMSG)
+ goto exit;
+
+ crc = crc32(UBI_CRC32_INIT, ec_hdr, UBI_EC_HDR_SIZE_CRC);
+ hdr_crc = be32_to_cpu(ec_hdr->hdr_crc);
+ if (hdr_crc != crc) {
+ ubi_err("bad CRC, calculated %#08x, read %#08x", crc, hdr_crc);
+ ubi_err("paranoid check failed for PEB %d", pnum);
+ ubi_dbg_dump_ec_hdr(ec_hdr);
+ ubi_dbg_dump_stack();
+ err = 1;
+ goto exit;
+ }
+
+ err = paranoid_check_ec_hdr(ubi, pnum, ec_hdr);
+
+exit:
+ kfree(ec_hdr);
+ return err;
+}
+
+/**
+ * paranoid_check_vid_hdr - check that a volume identifier header is all right.
+ * @ubi: UBI device description object
+ * @pnum: physical eraseblock number the volume identifier header belongs to
+ * @vid_hdr: the volume identifier header to check
+ *
+ * This function returns zero if the volume identifier header is all right, and
+ * %1 if not.
+ */
+static int paranoid_check_vid_hdr(const struct ubi_device *ubi, int pnum,
+ const struct ubi_vid_hdr *vid_hdr)
+{
+ int err;
+ uint32_t magic;
+
+ magic = be32_to_cpu(vid_hdr->magic);
+ if (magic != UBI_VID_HDR_MAGIC) {
+ ubi_err("bad VID header magic %#08x at PEB %d, must be %#08x",
+ magic, pnum, UBI_VID_HDR_MAGIC);
+ goto fail;
+ }
+
+ err = validate_vid_hdr(ubi, vid_hdr);
+ if (err) {
+ ubi_err("paranoid check failed for PEB %d", pnum);
+ goto fail;
+ }
+
+ return err;
+
+fail:
+ ubi_err("paranoid check failed for PEB %d", pnum);
+ ubi_dbg_dump_vid_hdr(vid_hdr);
+ ubi_dbg_dump_stack();
+ return 1;
+
+}
+
+/**
+ * paranoid_check_peb_vid_hdr - check that the volume identifier header of a
+ * physical eraseblock is in-place and is all right.
+ * @ubi: UBI device description object
+ * @pnum: the physical eraseblock number to check
+ *
+ * This function returns zero if the volume identifier header is all right,
+ * %1 if not, and a negative error code if an error occurred.
+ */
+static int paranoid_check_peb_vid_hdr(const struct ubi_device *ubi, int pnum)
+{
+ int err;
+ uint32_t crc, hdr_crc;
+ struct ubi_vid_hdr *vid_hdr;
+ void *p;
+
+ vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
+ if (!vid_hdr)
+ return -ENOMEM;
+
+ p = (char *)vid_hdr - ubi->vid_hdr_shift;
+ err = ubi_io_read(ubi, p, pnum, ubi->vid_hdr_aloffset,
+ ubi->vid_hdr_alsize);
+ if (err && err != UBI_IO_BITFLIPS && err != -EBADMSG)
+ goto exit;
+
+ crc = crc32(UBI_CRC32_INIT, vid_hdr, UBI_EC_HDR_SIZE_CRC);
+ hdr_crc = be32_to_cpu(vid_hdr->hdr_crc);
+ if (hdr_crc != crc) {
+ ubi_err("bad VID header CRC at PEB %d, calculated %#08x, "
+ "read %#08x", pnum, crc, hdr_crc);
+ ubi_err("paranoid check failed for PEB %d", pnum);
+ ubi_dbg_dump_vid_hdr(vid_hdr);
+ ubi_dbg_dump_stack();
+ err = 1;
+ goto exit;
+ }
+
+ err = paranoid_check_vid_hdr(ubi, pnum, vid_hdr);
+
+exit:
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return err;
+}
+
+/**
+ * paranoid_check_all_ff - check that a region of flash is empty.
+ * @ubi: UBI device description object
+ * @pnum: the physical eraseblock number to check
+ * @offset: the starting offset within the physical eraseblock to check
+ * @len: the length of the region to check
+ *
+ * This function returns zero if only 0xFF bytes are present at offset
+ * @offset of the physical eraseblock @pnum, %1 if not, and a negative error
+ * code if an error occurred.
+ */
+static int paranoid_check_all_ff(struct ubi_device *ubi, int pnum, int offset,
+ int len)
+{
+ size_t read;
+ int err;
+ loff_t addr = (loff_t)pnum * ubi->peb_size + offset;
+
+ mutex_lock(&ubi->dbg_buf_mutex);
+ err = ubi->mtd->read(ubi->mtd, addr, len, &read, ubi->dbg_peb_buf);
+ if (err && err != -EUCLEAN) {
+ ubi_err("error %d while reading %d bytes from PEB %d:%d, "
+ "read %zd bytes", err, len, pnum, offset, read);
+ goto error;
+ }
+
+ err = check_pattern(ubi->dbg_peb_buf, 0xFF, len);
+ if (err == 0) {
+ ubi_err("flash region at PEB %d:%d, length %d does not "
+ "contain all 0xFF bytes", pnum, offset, len);
+ goto fail;
+ }
+ mutex_unlock(&ubi->dbg_buf_mutex);
+
+ return 0;
+
+fail:
+ ubi_err("paranoid check failed for PEB %d", pnum);
+ dbg_msg("hex dump of the %d-%d region", offset, offset + len);
+ print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
+ ubi->dbg_peb_buf, len, 1);
+ err = 1;
+error:
+ ubi_dbg_dump_stack();
+ mutex_unlock(&ubi->dbg_buf_mutex);
+ return err;
+}
+
+#endif /* CONFIG_MTD_UBI_DEBUG_PARANOID */
diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c
new file mode 100644
index 0000000..fac76f2
--- /dev/null
+++ b/drivers/mtd/ubi/kapi.c
@@ -0,0 +1,638 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+/* This file mostly implements UBI kernel API functions */
+
+#ifdef UBI_LINUX
+#include <linux/module.h>
+#include <linux/err.h>
+#include <asm/div64.h>
+#endif
+
+#include "ubi-barebox.h"
+#include "ubi.h"
+
+/**
+ * ubi_get_device_info - get information about UBI device.
+ * @ubi_num: UBI device number
+ * @di: the information is stored here
+ *
+ * This function returns %0 in case of success, %-EINVAL if the UBI device
+ * number is invalid, and %-ENODEV if there is no such UBI device.
+ */
+int ubi_get_device_info(int ubi_num, struct ubi_device_info *di)
+{
+ struct ubi_device *ubi;
+
+ if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES)
+ return -EINVAL;
+
+ ubi = ubi_get_device(ubi_num);
+ if (!ubi)
+ return -ENODEV;
+
+ di->ubi_num = ubi->ubi_num;
+ di->leb_size = ubi->leb_size;
+ di->min_io_size = ubi->min_io_size;
+ di->ro_mode = ubi->ro_mode;
+ di->cdev = ubi->cdev.dev;
+
+ ubi_put_device(ubi);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ubi_get_device_info);
+
+/**
+ * ubi_get_volume_info - get information about UBI volume.
+ * @desc: volume descriptor
+ * @vi: the information is stored here
+ */
+void ubi_get_volume_info(struct ubi_volume_desc *desc,
+ struct ubi_volume_info *vi)
+{
+ struct ubi_volume *vol = desc->vol;
+ struct ubi_device *ubi = vol->ubi;
+
+ vi->vol_id = vol->vol_id;
+ vi->ubi_num = ubi->ubi_num;
+ vi->size = vol->reserved_pebs;
+ vi->used_bytes = vol->used_bytes;
+ vi->vol_type = vol->vol_type;
+ vi->corrupted = vol->corrupted;
+ vi->upd_marker = vol->upd_marker;
+ vi->alignment = vol->alignment;
+ vi->usable_leb_size = vol->usable_leb_size;
+ vi->name_len = vol->name_len;
+ vi->name = vol->name;
+ vi->cdev = vol->cdev.dev;
+}
+EXPORT_SYMBOL_GPL(ubi_get_volume_info);
+
+/**
+ * ubi_open_volume - open UBI volume.
+ * @ubi_num: UBI device number
+ * @vol_id: volume ID
+ * @mode: open mode
+ *
+ * The @mode parameter specifies if the volume should be opened in read-only
+ * mode, read-write mode, or exclusive mode. The exclusive mode guarantees that
+ * nobody else will be able to open this volume. UBI allows to have many volume
+ * readers and one writer at a time.
+ *
+ * If a static volume is being opened for the first time since boot, it will be
+ * checked by this function, which means it will be fully read and the CRC
+ * checksum of each logical eraseblock will be checked.
+ *
+ * This function returns volume descriptor in case of success and a negative
+ * error code in case of failure.
+ */
+struct ubi_volume_desc *ubi_open_volume(int ubi_num, int vol_id, int mode)
+{
+ int err;
+ struct ubi_volume_desc *desc;
+ struct ubi_device *ubi;
+ struct ubi_volume *vol;
+
+ dbg_msg("open device %d volume %d, mode %d", ubi_num, vol_id, mode);
+
+ if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES)
+ return ERR_PTR(-EINVAL);
+
+ if (mode != UBI_READONLY && mode != UBI_READWRITE &&
+ mode != UBI_EXCLUSIVE)
+ return ERR_PTR(-EINVAL);
+
+ /*
+ * First of all, we have to get the UBI device to prevent its removal.
+ */
+ ubi = ubi_get_device(ubi_num);
+ if (!ubi)
+ return ERR_PTR(-ENODEV);
+
+ if (vol_id < 0 || vol_id >= ubi->vtbl_slots) {
+ err = -EINVAL;
+ goto out_put_ubi;
+ }
+
+ desc = kmalloc(sizeof(struct ubi_volume_desc), GFP_KERNEL);
+ if (!desc) {
+ err = -ENOMEM;
+ goto out_put_ubi;
+ }
+
+ err = -ENODEV;
+ if (!try_module_get(THIS_MODULE))
+ goto out_free;
+
+ spin_lock(&ubi->volumes_lock);
+ vol = ubi->volumes[vol_id];
+ if (!vol)
+ goto out_unlock;
+
+ err = -EBUSY;
+ switch (mode) {
+ case UBI_READONLY:
+ if (vol->exclusive)
+ goto out_unlock;
+ vol->readers += 1;
+ break;
+
+ case UBI_READWRITE:
+ if (vol->exclusive || vol->writers > 0)
+ goto out_unlock;
+ vol->writers += 1;
+ break;
+
+ case UBI_EXCLUSIVE:
+ if (vol->exclusive || vol->writers || vol->readers)
+ goto out_unlock;
+ vol->exclusive = 1;
+ break;
+ }
+ get_device(&vol->dev);
+ vol->ref_count += 1;
+ spin_unlock(&ubi->volumes_lock);
+
+ desc->vol = vol;
+ desc->mode = mode;
+
+ mutex_lock(&ubi->ckvol_mutex);
+ if (!vol->checked) {
+ /* This is the first open - check the volume */
+ err = ubi_check_volume(ubi, vol_id);
+ if (err < 0) {
+ mutex_unlock(&ubi->ckvol_mutex);
+ ubi_close_volume(desc);
+ return ERR_PTR(err);
+ }
+ if (err == 1) {
+ ubi_warn("volume %d on UBI device %d is corrupted",
+ vol_id, ubi->ubi_num);
+ vol->corrupted = 1;
+ }
+ vol->checked = 1;
+ }
+ mutex_unlock(&ubi->ckvol_mutex);
+
+ return desc;
+
+out_unlock:
+ spin_unlock(&ubi->volumes_lock);
+ module_put(THIS_MODULE);
+out_free:
+ kfree(desc);
+out_put_ubi:
+ ubi_put_device(ubi);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(ubi_open_volume);
+
+/**
+ * ubi_open_volume_nm - open UBI volume by name.
+ * @ubi_num: UBI device number
+ * @name: volume name
+ * @mode: open mode
+ *
+ * This function is similar to 'ubi_open_volume()', but opens a volume by name.
+ */
+struct ubi_volume_desc *ubi_open_volume_nm(int ubi_num, const char *name,
+ int mode)
+{
+ int i, vol_id = -1, len;
+ struct ubi_device *ubi;
+ struct ubi_volume_desc *ret;
+
+ dbg_msg("open volume %s, mode %d", name, mode);
+
+ if (!name)
+ return ERR_PTR(-EINVAL);
+
+ len = strnlen(name, UBI_VOL_NAME_MAX + 1);
+ if (len > UBI_VOL_NAME_MAX)
+ return ERR_PTR(-EINVAL);
+
+ if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES)
+ return ERR_PTR(-EINVAL);
+
+ ubi = ubi_get_device(ubi_num);
+ if (!ubi)
+ return ERR_PTR(-ENODEV);
+
+ spin_lock(&ubi->volumes_lock);
+ /* Walk all volumes of this UBI device */
+ for (i = 0; i < ubi->vtbl_slots; i++) {
+ struct ubi_volume *vol = ubi->volumes[i];
+
+ if (vol && len == vol->name_len && !strcmp(name, vol->name)) {
+ vol_id = i;
+ break;
+ }
+ }
+ spin_unlock(&ubi->volumes_lock);
+
+ if (vol_id >= 0)
+ ret = ubi_open_volume(ubi_num, vol_id, mode);
+ else
+ ret = ERR_PTR(-ENODEV);
+
+ /*
+ * We should put the UBI device even in case of success, because
+ * 'ubi_open_volume()' took a reference as well.
+ */
+ ubi_put_device(ubi);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ubi_open_volume_nm);
+
+/**
+ * ubi_close_volume - close UBI volume.
+ * @desc: volume descriptor
+ */
+void ubi_close_volume(struct ubi_volume_desc *desc)
+{
+ struct ubi_volume *vol = desc->vol;
+ struct ubi_device *ubi = vol->ubi;
+
+ dbg_msg("close volume %d, mode %d", vol->vol_id, desc->mode);
+
+ spin_lock(&ubi->volumes_lock);
+ switch (desc->mode) {
+ case UBI_READONLY:
+ vol->readers -= 1;
+ break;
+ case UBI_READWRITE:
+ vol->writers -= 1;
+ break;
+ case UBI_EXCLUSIVE:
+ vol->exclusive = 0;
+ }
+ vol->ref_count -= 1;
+ spin_unlock(&ubi->volumes_lock);
+
+ kfree(desc);
+ put_device(&vol->dev);
+ ubi_put_device(ubi);
+ module_put(THIS_MODULE);
+}
+EXPORT_SYMBOL_GPL(ubi_close_volume);
+
+/**
+ * ubi_leb_read - read data.
+ * @desc: volume descriptor
+ * @lnum: logical eraseblock number to read from
+ * @buf: buffer where to store the read data
+ * @offset: offset within the logical eraseblock to read from
+ * @len: how many bytes to read
+ * @check: whether UBI has to check the read data's CRC or not.
+ *
+ * This function reads data from offset @offset of logical eraseblock @lnum and
+ * stores the data at @buf. When reading from static volumes, @check specifies
+ * whether the data has to be checked or not. If yes, the whole logical
+ * eraseblock will be read and its CRC checksum will be checked (i.e., the CRC
+ * checksum is per-eraseblock). So checking may substantially slow down the
+ * read speed. The @check argument is ignored for dynamic volumes.
+ *
+ * In case of success, this function returns zero. In case of failure, this
+ * function returns a negative error code.
+ *
+ * %-EBADMSG error code is returned:
+ * o for both static and dynamic volumes if MTD driver has detected a data
+ * integrity problem (unrecoverable ECC checksum mismatch in case of NAND);
+ * o for static volumes in case of data CRC mismatch.
+ *
+ * If the volume is damaged because of an interrupted update this function just
+ * returns immediately with %-EBADF error code.
+ */
+int ubi_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
+ int len, int check)
+{
+ struct ubi_volume *vol = desc->vol;
+ struct ubi_device *ubi = vol->ubi;
+ int err, vol_id = vol->vol_id;
+
+ dbg_msg("read %d bytes from LEB %d:%d:%d", len, vol_id, lnum, offset);
+
+ if (vol_id < 0 || vol_id >= ubi->vtbl_slots || lnum < 0 ||
+ lnum >= vol->used_ebs || offset < 0 || len < 0 ||
+ offset + len > vol->usable_leb_size)
+ return -EINVAL;
+
+ if (vol->vol_type == UBI_STATIC_VOLUME) {
+ if (vol->used_ebs == 0)
+ /* Empty static UBI volume */
+ return 0;
+ if (lnum == vol->used_ebs - 1 &&
+ offset + len > vol->last_eb_bytes)
+ return -EINVAL;
+ }
+
+ if (vol->upd_marker)
+ return -EBADF;
+ if (len == 0)
+ return 0;
+
+ err = ubi_eba_read_leb(ubi, vol, lnum, buf, offset, len, check);
+ if (err && err == -EBADMSG && vol->vol_type == UBI_STATIC_VOLUME) {
+ ubi_warn("mark volume %d as corrupted", vol_id);
+ vol->corrupted = 1;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(ubi_leb_read);
+
+/**
+ * ubi_leb_write - write data.
+ * @desc: volume descriptor
+ * @lnum: logical eraseblock number to write to
+ * @buf: data to write
+ * @offset: offset within the logical eraseblock where to write
+ * @len: how many bytes to write
+ * @dtype: expected data type
+ *
+ * This function writes @len bytes of data from @buf to offset @offset of
+ * logical eraseblock @lnum. The @dtype argument describes expected lifetime of
+ * the data.
+ *
+ * This function takes care of physical eraseblock write failures. If write to
+ * the physical eraseblock write operation fails, the logical eraseblock is
+ * re-mapped to another physical eraseblock, the data is recovered, and the
+ * write finishes. UBI has a pool of reserved physical eraseblocks for this.
+ *
+ * If all the data were successfully written, zero is returned. If an error
+ * occurred and UBI has not been able to recover from it, this function returns
+ * a negative error code. Note, in case of an error, it is possible that
+ * something was still written to the flash media, but that may be some
+ * garbage.
+ *
+ * If the volume is damaged because of an interrupted update this function just
+ * returns immediately with %-EBADF code.
+ */
+int ubi_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
+ int offset, int len, int dtype)
+{
+ struct ubi_volume *vol = desc->vol;
+ struct ubi_device *ubi = vol->ubi;
+ int vol_id = vol->vol_id;
+
+ dbg_msg("write %d bytes to LEB %d:%d:%d", len, vol_id, lnum, offset);
+
+ if (vol_id < 0 || vol_id >= ubi->vtbl_slots)
+ return -EINVAL;
+
+ if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME)
+ return -EROFS;
+
+ if (lnum < 0 || lnum >= vol->reserved_pebs || offset < 0 || len < 0 ||
+ offset + len > vol->usable_leb_size ||
+ offset & (ubi->min_io_size - 1) || len & (ubi->min_io_size - 1))
+ return -EINVAL;
+
+ if (dtype != UBI_LONGTERM && dtype != UBI_SHORTTERM &&
+ dtype != UBI_UNKNOWN)
+ return -EINVAL;
+
+ if (vol->upd_marker)
+ return -EBADF;
+
+ if (len == 0)
+ return 0;
+
+ return ubi_eba_write_leb(ubi, vol, lnum, buf, offset, len, dtype);
+}
+EXPORT_SYMBOL_GPL(ubi_leb_write);
+
+/*
+ * ubi_leb_change - change logical eraseblock atomically.
+ * @desc: volume descriptor
+ * @lnum: logical eraseblock number to change
+ * @buf: data to write
+ * @len: how many bytes to write
+ * @dtype: expected data type
+ *
+ * This function changes the contents of a logical eraseblock atomically. @buf
+ * has to contain new logical eraseblock data, and @len - the length of the
+ * data, which has to be aligned. The length may be shorter then the logical
+ * eraseblock size, ant the logical eraseblock may be appended to more times
+ * later on. This function guarantees that in case of an unclean reboot the old
+ * contents is preserved. Returns zero in case of success and a negative error
+ * code in case of failure.
+ */
+int ubi_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
+ int len, int dtype)
+{
+ struct ubi_volume *vol = desc->vol;
+ struct ubi_device *ubi = vol->ubi;
+ int vol_id = vol->vol_id;
+
+ dbg_msg("atomically write %d bytes to LEB %d:%d", len, vol_id, lnum);
+
+ if (vol_id < 0 || vol_id >= ubi->vtbl_slots)
+ return -EINVAL;
+
+ if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME)
+ return -EROFS;
+
+ if (lnum < 0 || lnum >= vol->reserved_pebs || len < 0 ||
+ len > vol->usable_leb_size || len & (ubi->min_io_size - 1))
+ return -EINVAL;
+
+ if (dtype != UBI_LONGTERM && dtype != UBI_SHORTTERM &&
+ dtype != UBI_UNKNOWN)
+ return -EINVAL;
+
+ if (vol->upd_marker)
+ return -EBADF;
+
+ if (len == 0)
+ return 0;
+
+ return ubi_eba_atomic_leb_change(ubi, vol, lnum, buf, len, dtype);
+}
+EXPORT_SYMBOL_GPL(ubi_leb_change);
+
+/**
+ * ubi_leb_erase - erase logical eraseblock.
+ * @desc: volume descriptor
+ * @lnum: logical eraseblock number
+ *
+ * This function un-maps logical eraseblock @lnum and synchronously erases the
+ * correspondent physical eraseblock. Returns zero in case of success and a
+ * negative error code in case of failure.
+ *
+ * If the volume is damaged because of an interrupted update this function just
+ * returns immediately with %-EBADF code.
+ */
+int ubi_leb_erase(struct ubi_volume_desc *desc, int lnum)
+{
+ struct ubi_volume *vol = desc->vol;
+ struct ubi_device *ubi = vol->ubi;
+ int err;
+
+ dbg_msg("erase LEB %d:%d", vol->vol_id, lnum);
+
+ if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME)
+ return -EROFS;
+
+ if (lnum < 0 || lnum >= vol->reserved_pebs)
+ return -EINVAL;
+
+ if (vol->upd_marker)
+ return -EBADF;
+
+ err = ubi_eba_unmap_leb(ubi, vol, lnum);
+ if (err)
+ return err;
+
+ return ubi_wl_flush(ubi);
+}
+EXPORT_SYMBOL_GPL(ubi_leb_erase);
+
+/**
+ * ubi_leb_unmap - un-map logical eraseblock.
+ * @desc: volume descriptor
+ * @lnum: logical eraseblock number
+ *
+ * This function un-maps logical eraseblock @lnum and schedules the
+ * corresponding physical eraseblock for erasure, so that it will eventually be
+ * physically erased in background. This operation is much faster then the
+ * erase operation.
+ *
+ * Unlike erase, the un-map operation does not guarantee that the logical
+ * eraseblock will contain all 0xFF bytes when UBI is initialized again. For
+ * example, if several logical eraseblocks are un-mapped, and an unclean reboot
+ * happens after this, the logical eraseblocks will not necessarily be
+ * un-mapped again when this MTD device is attached. They may actually be
+ * mapped to the same physical eraseblocks again. So, this function has to be
+ * used with care.
+ *
+ * In other words, when un-mapping a logical eraseblock, UBI does not store
+ * any information about this on the flash media, it just marks the logical
+ * eraseblock as "un-mapped" in RAM. If UBI is detached before the physical
+ * eraseblock is physically erased, it will be mapped again to the same logical
+ * eraseblock when the MTD device is attached again.
+ *
+ * The main and obvious use-case of this function is when the contents of a
+ * logical eraseblock has to be re-written. Then it is much more efficient to
+ * first un-map it, then write new data, rather then first erase it, then write
+ * new data. Note, once new data has been written to the logical eraseblock,
+ * UBI guarantees that the old contents has gone forever. In other words, if an
+ * unclean reboot happens after the logical eraseblock has been un-mapped and
+ * then written to, it will contain the last written data.
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure. If the volume is damaged because of an interrupted update
+ * this function just returns immediately with %-EBADF code.
+ */
+int ubi_leb_unmap(struct ubi_volume_desc *desc, int lnum)
+{
+ struct ubi_volume *vol = desc->vol;
+ struct ubi_device *ubi = vol->ubi;
+
+ dbg_msg("unmap LEB %d:%d", vol->vol_id, lnum);
+
+ if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME)
+ return -EROFS;
+
+ if (lnum < 0 || lnum >= vol->reserved_pebs)
+ return -EINVAL;
+
+ if (vol->upd_marker)
+ return -EBADF;
+
+ return ubi_eba_unmap_leb(ubi, vol, lnum);
+}
+EXPORT_SYMBOL_GPL(ubi_leb_unmap);
+
+/**
+ * ubi_leb_map - map logical erasblock to a physical eraseblock.
+ * @desc: volume descriptor
+ * @lnum: logical eraseblock number
+ * @dtype: expected data type
+ *
+ * This function maps an un-mapped logical eraseblock @lnum to a physical
+ * eraseblock. This means, that after a successfull invocation of this
+ * function the logical eraseblock @lnum will be empty (contain only %0xFF
+ * bytes) and be mapped to a physical eraseblock, even if an unclean reboot
+ * happens.
+ *
+ * This function returns zero in case of success, %-EBADF if the volume is
+ * damaged because of an interrupted update, %-EBADMSG if the logical
+ * eraseblock is already mapped, and other negative error codes in case of
+ * other failures.
+ */
+int ubi_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype)
+{
+ struct ubi_volume *vol = desc->vol;
+ struct ubi_device *ubi = vol->ubi;
+
+ dbg_msg("unmap LEB %d:%d", vol->vol_id, lnum);
+
+ if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME)
+ return -EROFS;
+
+ if (lnum < 0 || lnum >= vol->reserved_pebs)
+ return -EINVAL;
+
+ if (dtype != UBI_LONGTERM && dtype != UBI_SHORTTERM &&
+ dtype != UBI_UNKNOWN)
+ return -EINVAL;
+
+ if (vol->upd_marker)
+ return -EBADF;
+
+ if (vol->eba_tbl[lnum] >= 0)
+ return -EBADMSG;
+
+ return ubi_eba_write_leb(ubi, vol, lnum, NULL, 0, 0, dtype);
+}
+EXPORT_SYMBOL_GPL(ubi_leb_map);
+
+/**
+ * ubi_is_mapped - check if logical eraseblock is mapped.
+ * @desc: volume descriptor
+ * @lnum: logical eraseblock number
+ *
+ * This function checks if logical eraseblock @lnum is mapped to a physical
+ * eraseblock. If a logical eraseblock is un-mapped, this does not necessarily
+ * mean it will still be un-mapped after the UBI device is re-attached. The
+ * logical eraseblock may become mapped to the physical eraseblock it was last
+ * mapped to.
+ *
+ * This function returns %1 if the LEB is mapped, %0 if not, and a negative
+ * error code in case of failure. If the volume is damaged because of an
+ * interrupted update this function just returns immediately with %-EBADF error
+ * code.
+ */
+int ubi_is_mapped(struct ubi_volume_desc *desc, int lnum)
+{
+ struct ubi_volume *vol = desc->vol;
+
+ dbg_msg("test LEB %d:%d", vol->vol_id, lnum);
+
+ if (lnum < 0 || lnum >= vol->reserved_pebs)
+ return -EINVAL;
+
+ if (vol->upd_marker)
+ return -EBADF;
+
+ return vol->eba_tbl[lnum] >= 0;
+}
+EXPORT_SYMBOL_GPL(ubi_is_mapped);
diff --git a/drivers/mtd/ubi/misc.c b/drivers/mtd/ubi/misc.c
new file mode 100644
index 0000000..298925d
--- /dev/null
+++ b/drivers/mtd/ubi/misc.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+/* Here we keep miscellaneous functions which are used all over the UBI code */
+
+#include "ubi-barebox.h"
+#include "ubi.h"
+
+/**
+ * calc_data_len - calculate how much real data is stored in a buffer.
+ * @ubi: UBI device description object
+ * @buf: a buffer with the contents of the physical eraseblock
+ * @length: the buffer length
+ *
+ * This function calculates how much "real data" is stored in @buf and returnes
+ * the length. Continuous 0xFF bytes at the end of the buffer are not
+ * considered as "real data".
+ */
+int ubi_calc_data_len(const struct ubi_device *ubi, const void *buf,
+ int length)
+{
+ int i;
+
+ ubi_assert(!(length & (ubi->min_io_size - 1)));
+
+ for (i = length - 1; i >= 0; i--)
+ if (((const uint8_t *)buf)[i] != 0xFF)
+ break;
+
+ /* The resulting length must be aligned to the minimum flash I/O size */
+ length = ALIGN(i + 1, ubi->min_io_size);
+ return length;
+}
+
+/**
+ * ubi_check_volume - check the contents of a static volume.
+ * @ubi: UBI device description object
+ * @vol_id: ID of the volume to check
+ *
+ * This function checks if static volume @vol_id is corrupted by fully reading
+ * it and checking data CRC. This function returns %0 if the volume is not
+ * corrupted, %1 if it is corrupted and a negative error code in case of
+ * failure. Dynamic volumes are not checked and zero is returned immediately.
+ */
+int ubi_check_volume(struct ubi_device *ubi, int vol_id)
+{
+ void *buf;
+ int err = 0, i;
+ struct ubi_volume *vol = ubi->volumes[vol_id];
+
+ if (vol->vol_type != UBI_STATIC_VOLUME)
+ return 0;
+
+ buf = vmalloc(vol->usable_leb_size);
+ if (!buf)
+ return -ENOMEM;
+
+ for (i = 0; i < vol->used_ebs; i++) {
+ int size;
+
+ if (i == vol->used_ebs - 1)
+ size = vol->last_eb_bytes;
+ else
+ size = vol->usable_leb_size;
+
+ err = ubi_eba_read_leb(ubi, vol, i, buf, 0, size, 1);
+ if (err) {
+ if (err == -EBADMSG)
+ err = 1;
+ break;
+ }
+ }
+
+ vfree(buf);
+ return err;
+}
+
+/**
+ * ubi_calculate_rsvd_pool - calculate how many PEBs must be reserved for bad
+ * eraseblock handling.
+ * @ubi: UBI device description object
+ */
+void ubi_calculate_reserved(struct ubi_device *ubi)
+{
+ ubi->beb_rsvd_level = ubi->good_peb_count/100;
+ ubi->beb_rsvd_level *= CONFIG_MTD_UBI_BEB_RESERVE;
+ if (ubi->beb_rsvd_level < MIN_RESEVED_PEBS)
+ ubi->beb_rsvd_level = MIN_RESEVED_PEBS;
+}
diff --git a/drivers/mtd/ubi/scan.c b/drivers/mtd/ubi/scan.c
new file mode 100644
index 0000000..3e7fc35
--- /dev/null
+++ b/drivers/mtd/ubi/scan.c
@@ -0,0 +1,1362 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+/*
+ * UBI scanning unit.
+ *
+ * This unit is responsible for scanning the flash media, checking UBI
+ * headers and providing complete information about the UBI flash image.
+ *
+ * The scanning information is represented by a &struct ubi_scan_info' object.
+ * Information about found volumes is represented by &struct ubi_scan_volume
+ * objects which are kept in volume RB-tree with root at the @volumes field.
+ * The RB-tree is indexed by the volume ID.
+ *
+ * Found logical eraseblocks are represented by &struct ubi_scan_leb objects.
+ * These objects are kept in per-volume RB-trees with the root at the
+ * corresponding &struct ubi_scan_volume object. To put it differently, we keep
+ * an RB-tree of per-volume objects and each of these objects is the root of
+ * RB-tree of per-eraseblock objects.
+ *
+ * Corrupted physical eraseblocks are put to the @corr list, free physical
+ * eraseblocks are put to the @free list and the physical eraseblock to be
+ * erased are put to the @erase list.
+ */
+
+#ifdef UBI_LINUX
+#include <linux/err.h>
+#include <linux/crc32.h>
+#include <asm/div64.h>
+#endif
+
+#include "ubi-barebox.h"
+#include "ubi.h"
+
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
+static int paranoid_check_si(struct ubi_device *ubi, struct ubi_scan_info *si);
+#else
+#define paranoid_check_si(ubi, si) 0
+#endif
+
+/* Temporary variables used during scanning */
+static struct ubi_ec_hdr *ech;
+static struct ubi_vid_hdr *vidh;
+
+/**
+ * add_to_list - add physical eraseblock to a list.
+ * @si: scanning information
+ * @pnum: physical eraseblock number to add
+ * @ec: erase counter of the physical eraseblock
+ * @list: the list to add to
+ *
+ * This function adds physical eraseblock @pnum to free, erase, corrupted or
+ * alien lists. Returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int add_to_list(struct ubi_scan_info *si, int pnum, int ec,
+ struct list_head *list)
+{
+ struct ubi_scan_leb *seb;
+
+ if (list == &si->free)
+ dbg_bld("add to free: PEB %d, EC %d", pnum, ec);
+ else if (list == &si->erase)
+ dbg_bld("add to erase: PEB %d, EC %d", pnum, ec);
+ else if (list == &si->corr)
+ dbg_bld("add to corrupted: PEB %d, EC %d", pnum, ec);
+ else if (list == &si->alien)
+ dbg_bld("add to alien: PEB %d, EC %d", pnum, ec);
+ else
+ BUG();
+
+ seb = kmalloc(sizeof(struct ubi_scan_leb), GFP_KERNEL);
+ if (!seb)
+ return -ENOMEM;
+
+ seb->pnum = pnum;
+ seb->ec = ec;
+ list_add_tail(&seb->u.list, list);
+ return 0;
+}
+
+/**
+ * validate_vid_hdr - check that volume identifier header is correct and
+ * consistent.
+ * @vid_hdr: the volume identifier header to check
+ * @sv: information about the volume this logical eraseblock belongs to
+ * @pnum: physical eraseblock number the VID header came from
+ *
+ * This function checks that data stored in @vid_hdr is consistent. Returns
+ * non-zero if an inconsistency was found and zero if not.
+ *
+ * Note, UBI does sanity check of everything it reads from the flash media.
+ * Most of the checks are done in the I/O unit. Here we check that the
+ * information in the VID header is consistent to the information in other VID
+ * headers of the same volume.
+ */
+static int validate_vid_hdr(const struct ubi_vid_hdr *vid_hdr,
+ const struct ubi_scan_volume *sv, int pnum)
+{
+ int vol_type = vid_hdr->vol_type;
+ int vol_id = be32_to_cpu(vid_hdr->vol_id);
+ int used_ebs = be32_to_cpu(vid_hdr->used_ebs);
+ int data_pad = be32_to_cpu(vid_hdr->data_pad);
+
+ if (sv->leb_count != 0) {
+ int sv_vol_type;
+
+ /*
+ * This is not the first logical eraseblock belonging to this
+ * volume. Ensure that the data in its VID header is consistent
+ * to the data in previous logical eraseblock headers.
+ */
+
+ if (vol_id != sv->vol_id) {
+ dbg_err("inconsistent vol_id");
+ goto bad;
+ }
+
+ if (sv->vol_type == UBI_STATIC_VOLUME)
+ sv_vol_type = UBI_VID_STATIC;
+ else
+ sv_vol_type = UBI_VID_DYNAMIC;
+
+ if (vol_type != sv_vol_type) {
+ dbg_err("inconsistent vol_type");
+ goto bad;
+ }
+
+ if (used_ebs != sv->used_ebs) {
+ dbg_err("inconsistent used_ebs");
+ goto bad;
+ }
+
+ if (data_pad != sv->data_pad) {
+ dbg_err("inconsistent data_pad");
+ goto bad;
+ }
+ }
+
+ return 0;
+
+bad:
+ ubi_err("inconsistent VID header at PEB %d", pnum);
+ ubi_dbg_dump_vid_hdr(vid_hdr);
+ ubi_dbg_dump_sv(sv);
+ return -EINVAL;
+}
+
+/**
+ * add_volume - add volume to the scanning information.
+ * @si: scanning information
+ * @vol_id: ID of the volume to add
+ * @pnum: physical eraseblock number
+ * @vid_hdr: volume identifier header
+ *
+ * If the volume corresponding to the @vid_hdr logical eraseblock is already
+ * present in the scanning information, this function does nothing. Otherwise
+ * it adds corresponding volume to the scanning information. Returns a pointer
+ * to the scanning volume object in case of success and a negative error code
+ * in case of failure.
+ */
+static struct ubi_scan_volume *add_volume(struct ubi_scan_info *si, int vol_id,
+ int pnum,
+ const struct ubi_vid_hdr *vid_hdr)
+{
+ struct ubi_scan_volume *sv;
+ struct rb_node **p = &si->volumes.rb_node, *parent = NULL;
+
+ ubi_assert(vol_id == be32_to_cpu(vid_hdr->vol_id));
+
+ /* Walk the volume RB-tree to look if this volume is already present */
+ while (*p) {
+ parent = *p;
+ sv = rb_entry(parent, struct ubi_scan_volume, rb);
+
+ if (vol_id == sv->vol_id)
+ return sv;
+
+ if (vol_id > sv->vol_id)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ /* The volume is absent - add it */
+ sv = kmalloc(sizeof(struct ubi_scan_volume), GFP_KERNEL);
+ if (!sv)
+ return ERR_PTR(-ENOMEM);
+
+ sv->highest_lnum = sv->leb_count = 0;
+ sv->vol_id = vol_id;
+ sv->root = RB_ROOT;
+ sv->used_ebs = be32_to_cpu(vid_hdr->used_ebs);
+ sv->data_pad = be32_to_cpu(vid_hdr->data_pad);
+ sv->compat = vid_hdr->compat;
+ sv->vol_type = vid_hdr->vol_type == UBI_VID_DYNAMIC ? UBI_DYNAMIC_VOLUME
+ : UBI_STATIC_VOLUME;
+ if (vol_id > si->highest_vol_id)
+ si->highest_vol_id = vol_id;
+
+ rb_link_node(&sv->rb, parent, p);
+ rb_insert_color(&sv->rb, &si->volumes);
+ si->vols_found += 1;
+ dbg_bld("added volume %d", vol_id);
+ return sv;
+}
+
+/**
+ * compare_lebs - find out which logical eraseblock is newer.
+ * @ubi: UBI device description object
+ * @seb: first logical eraseblock to compare
+ * @pnum: physical eraseblock number of the second logical eraseblock to
+ * compare
+ * @vid_hdr: volume identifier header of the second logical eraseblock
+ *
+ * This function compares 2 copies of a LEB and informs which one is newer. In
+ * case of success this function returns a positive value, in case of failure, a
+ * negative error code is returned. The success return codes use the following
+ * bits:
+ * o bit 0 is cleared: the first PEB (described by @seb) is newer then the
+ * second PEB (described by @pnum and @vid_hdr);
+ * o bit 0 is set: the second PEB is newer;
+ * o bit 1 is cleared: no bit-flips were detected in the newer LEB;
+ * o bit 1 is set: bit-flips were detected in the newer LEB;
+ * o bit 2 is cleared: the older LEB is not corrupted;
+ * o bit 2 is set: the older LEB is corrupted.
+ */
+static int compare_lebs(struct ubi_device *ubi, const struct ubi_scan_leb *seb,
+ int pnum, const struct ubi_vid_hdr *vid_hdr)
+{
+ void *buf;
+ int len, err, second_is_newer, bitflips = 0, corrupted = 0;
+ uint32_t data_crc, crc;
+ struct ubi_vid_hdr *vh = NULL;
+ unsigned long long sqnum2 = be64_to_cpu(vid_hdr->sqnum);
+
+ if (seb->sqnum == 0 && sqnum2 == 0) {
+ long long abs, v1 = seb->leb_ver, v2 = be32_to_cpu(vid_hdr->leb_ver);
+
+ /*
+ * UBI constantly increases the logical eraseblock version
+ * number and it can overflow. Thus, we have to bear in mind
+ * that versions that are close to %0xFFFFFFFF are less then
+ * versions that are close to %0.
+ *
+ * The UBI WL unit guarantees that the number of pending tasks
+ * is not greater then %0x7FFFFFFF. So, if the difference
+ * between any two versions is greater or equivalent to
+ * %0x7FFFFFFF, there was an overflow and the logical
+ * eraseblock with lower version is actually newer then the one
+ * with higher version.
+ *
+ * FIXME: but this is anyway obsolete and will be removed at
+ * some point.
+ */
+ dbg_bld("using old crappy leb_ver stuff");
+
+ if (v1 == v2) {
+ ubi_err("PEB %d and PEB %d have the same version %lld",
+ seb->pnum, pnum, v1);
+ return -EINVAL;
+ }
+
+ abs = v1 - v2;
+ if (abs < 0)
+ abs = -abs;
+
+ if (abs < 0x7FFFFFFF)
+ /* Non-overflow situation */
+ second_is_newer = (v2 > v1);
+ else
+ second_is_newer = (v2 < v1);
+ } else
+ /* Obviously the LEB with lower sequence counter is older */
+ second_is_newer = sqnum2 > seb->sqnum;
+
+ /*
+ * Now we know which copy is newer. If the copy flag of the PEB with
+ * newer version is not set, then we just return, otherwise we have to
+ * check data CRC. For the second PEB we already have the VID header,
+ * for the first one - we'll need to re-read it from flash.
+ *
+ * FIXME: this may be optimized so that we wouldn't read twice.
+ */
+
+ if (second_is_newer) {
+ if (!vid_hdr->copy_flag) {
+ /* It is not a copy, so it is newer */
+ dbg_bld("second PEB %d is newer, copy_flag is unset",
+ pnum);
+ return 1;
+ }
+ } else {
+ pnum = seb->pnum;
+
+ vh = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL);
+ if (!vh)
+ return -ENOMEM;
+
+ err = ubi_io_read_vid_hdr(ubi, pnum, vh, 0);
+ if (err) {
+ if (err == UBI_IO_BITFLIPS)
+ bitflips = 1;
+ else {
+ dbg_err("VID of PEB %d header is bad, but it "
+ "was OK earlier", pnum);
+ if (err > 0)
+ err = -EIO;
+
+ goto out_free_vidh;
+ }
+ }
+
+ if (!vh->copy_flag) {
+ /* It is not a copy, so it is newer */
+ dbg_bld("first PEB %d is newer, copy_flag is unset",
+ pnum);
+ err = bitflips << 1;
+ goto out_free_vidh;
+ }
+
+ vid_hdr = vh;
+ }
+
+ /* Read the data of the copy and check the CRC */
+
+ len = be32_to_cpu(vid_hdr->data_size);
+ buf = vmalloc(len);
+ if (!buf) {
+ err = -ENOMEM;
+ goto out_free_vidh;
+ }
+
+ err = ubi_io_read_data(ubi, buf, pnum, 0, len);
+ if (err && err != UBI_IO_BITFLIPS)
+ goto out_free_buf;
+
+ data_crc = be32_to_cpu(vid_hdr->data_crc);
+ crc = crc32(UBI_CRC32_INIT, buf, len);
+ if (crc != data_crc) {
+ dbg_bld("PEB %d CRC error: calculated %#08x, must be %#08x",
+ pnum, crc, data_crc);
+ corrupted = 1;
+ bitflips = 0;
+ second_is_newer = !second_is_newer;
+ } else {
+ dbg_bld("PEB %d CRC is OK", pnum);
+ bitflips = !!err;
+ }
+
+ vfree(buf);
+ ubi_free_vid_hdr(ubi, vh);
+
+ if (second_is_newer)
+ dbg_bld("second PEB %d is newer, copy_flag is set", pnum);
+ else
+ dbg_bld("first PEB %d is newer, copy_flag is set", pnum);
+
+ return second_is_newer | (bitflips << 1) | (corrupted << 2);
+
+out_free_buf:
+ vfree(buf);
+out_free_vidh:
+ ubi_free_vid_hdr(ubi, vh);
+ return err;
+}
+
+/**
+ * ubi_scan_add_used - add information about a physical eraseblock to the
+ * scanning information.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ * @pnum: the physical eraseblock number
+ * @ec: erase counter
+ * @vid_hdr: the volume identifier header
+ * @bitflips: if bit-flips were detected when this physical eraseblock was read
+ *
+ * This function adds information about a used physical eraseblock to the
+ * 'used' tree of the corresponding volume. The function is rather complex
+ * because it has to handle cases when this is not the first physical
+ * eraseblock belonging to the same logical eraseblock, and the newer one has
+ * to be picked, while the older one has to be dropped. This function returns
+ * zero in case of success and a negative error code in case of failure.
+ */
+int ubi_scan_add_used(struct ubi_device *ubi, struct ubi_scan_info *si,
+ int pnum, int ec, const struct ubi_vid_hdr *vid_hdr,
+ int bitflips)
+{
+ int err, vol_id, lnum;
+ uint32_t leb_ver;
+ unsigned long long sqnum;
+ struct ubi_scan_volume *sv;
+ struct ubi_scan_leb *seb;
+ struct rb_node **p, *parent = NULL;
+
+ vol_id = be32_to_cpu(vid_hdr->vol_id);
+ lnum = be32_to_cpu(vid_hdr->lnum);
+ sqnum = be64_to_cpu(vid_hdr->sqnum);
+ leb_ver = be32_to_cpu(vid_hdr->leb_ver);
+
+ dbg_bld("PEB %d, LEB %d:%d, EC %d, sqnum %llu, ver %u, bitflips %d",
+ pnum, vol_id, lnum, ec, sqnum, leb_ver, bitflips);
+
+ sv = add_volume(si, vol_id, pnum, vid_hdr);
+ if (IS_ERR(sv) < 0)
+ return PTR_ERR(sv);
+
+ if (si->max_sqnum < sqnum)
+ si->max_sqnum = sqnum;
+
+ /*
+ * Walk the RB-tree of logical eraseblocks of volume @vol_id to look
+ * if this is the first instance of this logical eraseblock or not.
+ */
+ p = &sv->root.rb_node;
+ while (*p) {
+ int cmp_res;
+
+ parent = *p;
+ seb = rb_entry(parent, struct ubi_scan_leb, u.rb);
+ if (lnum != seb->lnum) {
+ if (lnum < seb->lnum)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ continue;
+ }
+
+ /*
+ * There is already a physical eraseblock describing the same
+ * logical eraseblock present.
+ */
+
+ dbg_bld("this LEB already exists: PEB %d, sqnum %llu, "
+ "LEB ver %u, EC %d", seb->pnum, seb->sqnum,
+ seb->leb_ver, seb->ec);
+
+ /*
+ * Make sure that the logical eraseblocks have different
+ * versions. Otherwise the image is bad.
+ */
+ if (seb->leb_ver == leb_ver && leb_ver != 0) {
+ ubi_err("two LEBs with same version %u", leb_ver);
+ ubi_dbg_dump_seb(seb, 0);
+ ubi_dbg_dump_vid_hdr(vid_hdr);
+ return -EINVAL;
+ }
+
+ /*
+ * Make sure that the logical eraseblocks have different
+ * sequence numbers. Otherwise the image is bad.
+ *
+ * FIXME: remove 'sqnum != 0' check when leb_ver is removed.
+ */
+ if (seb->sqnum == sqnum && sqnum != 0) {
+ ubi_err("two LEBs with same sequence number %llu",
+ sqnum);
+ ubi_dbg_dump_seb(seb, 0);
+ ubi_dbg_dump_vid_hdr(vid_hdr);
+ return -EINVAL;
+ }
+
+ /*
+ * Now we have to drop the older one and preserve the newer
+ * one.
+ */
+ cmp_res = compare_lebs(ubi, seb, pnum, vid_hdr);
+ if (cmp_res < 0)
+ return cmp_res;
+
+ if (cmp_res & 1) {
+ /*
+ * This logical eraseblock is newer then the one
+ * found earlier.
+ */
+ err = validate_vid_hdr(vid_hdr, sv, pnum);
+ if (err)
+ return err;
+
+ if (cmp_res & 4)
+ err = add_to_list(si, seb->pnum, seb->ec,
+ &si->corr);
+ else
+ err = add_to_list(si, seb->pnum, seb->ec,
+ &si->erase);
+ if (err)
+ return err;
+
+ seb->ec = ec;
+ seb->pnum = pnum;
+ seb->scrub = ((cmp_res & 2) || bitflips);
+ seb->sqnum = sqnum;
+ seb->leb_ver = leb_ver;
+
+ if (sv->highest_lnum == lnum)
+ sv->last_data_size =
+ be32_to_cpu(vid_hdr->data_size);
+
+ return 0;
+ } else {
+ /*
+ * This logical eraseblock is older then the one found
+ * previously.
+ */
+ if (cmp_res & 4)
+ return add_to_list(si, pnum, ec, &si->corr);
+ else
+ return add_to_list(si, pnum, ec, &si->erase);
+ }
+ }
+
+ /*
+ * We've met this logical eraseblock for the first time, add it to the
+ * scanning information.
+ */
+
+ err = validate_vid_hdr(vid_hdr, sv, pnum);
+ if (err)
+ return err;
+
+ seb = kmalloc(sizeof(struct ubi_scan_leb), GFP_KERNEL);
+ if (!seb)
+ return -ENOMEM;
+
+ seb->ec = ec;
+ seb->pnum = pnum;
+ seb->lnum = lnum;
+ seb->sqnum = sqnum;
+ seb->scrub = bitflips;
+ seb->leb_ver = leb_ver;
+
+ if (sv->highest_lnum <= lnum) {
+ sv->highest_lnum = lnum;
+ sv->last_data_size = be32_to_cpu(vid_hdr->data_size);
+ }
+
+ sv->leb_count += 1;
+ rb_link_node(&seb->u.rb, parent, p);
+ rb_insert_color(&seb->u.rb, &sv->root);
+ return 0;
+}
+
+/**
+ * ubi_scan_find_sv - find information about a particular volume in the
+ * scanning information.
+ * @si: scanning information
+ * @vol_id: the requested volume ID
+ *
+ * This function returns a pointer to the volume description or %NULL if there
+ * are no data about this volume in the scanning information.
+ */
+struct ubi_scan_volume *ubi_scan_find_sv(const struct ubi_scan_info *si,
+ int vol_id)
+{
+ struct ubi_scan_volume *sv;
+ struct rb_node *p = si->volumes.rb_node;
+
+ while (p) {
+ sv = rb_entry(p, struct ubi_scan_volume, rb);
+
+ if (vol_id == sv->vol_id)
+ return sv;
+
+ if (vol_id > sv->vol_id)
+ p = p->rb_left;
+ else
+ p = p->rb_right;
+ }
+
+ return NULL;
+}
+
+/**
+ * ubi_scan_find_seb - find information about a particular logical
+ * eraseblock in the volume scanning information.
+ * @sv: a pointer to the volume scanning information
+ * @lnum: the requested logical eraseblock
+ *
+ * This function returns a pointer to the scanning logical eraseblock or %NULL
+ * if there are no data about it in the scanning volume information.
+ */
+struct ubi_scan_leb *ubi_scan_find_seb(const struct ubi_scan_volume *sv,
+ int lnum)
+{
+ struct ubi_scan_leb *seb;
+ struct rb_node *p = sv->root.rb_node;
+
+ while (p) {
+ seb = rb_entry(p, struct ubi_scan_leb, u.rb);
+
+ if (lnum == seb->lnum)
+ return seb;
+
+ if (lnum > seb->lnum)
+ p = p->rb_left;
+ else
+ p = p->rb_right;
+ }
+
+ return NULL;
+}
+
+/**
+ * ubi_scan_rm_volume - delete scanning information about a volume.
+ * @si: scanning information
+ * @sv: the volume scanning information to delete
+ */
+void ubi_scan_rm_volume(struct ubi_scan_info *si, struct ubi_scan_volume *sv)
+{
+ struct rb_node *rb;
+ struct ubi_scan_leb *seb;
+
+ dbg_bld("remove scanning information about volume %d", sv->vol_id);
+
+ while ((rb = rb_first(&sv->root))) {
+ seb = rb_entry(rb, struct ubi_scan_leb, u.rb);
+ rb_erase(&seb->u.rb, &sv->root);
+ list_add_tail(&seb->u.list, &si->erase);
+ }
+
+ rb_erase(&sv->rb, &si->volumes);
+ kfree(sv);
+ si->vols_found -= 1;
+}
+
+/**
+ * ubi_scan_erase_peb - erase a physical eraseblock.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ * @pnum: physical eraseblock number to erase;
+ * @ec: erase counter value to write (%UBI_SCAN_UNKNOWN_EC if it is unknown)
+ *
+ * This function erases physical eraseblock 'pnum', and writes the erase
+ * counter header to it. This function should only be used on UBI device
+ * initialization stages, when the EBA unit had not been yet initialized. This
+ * function returns zero in case of success and a negative error code in case
+ * of failure.
+ */
+int ubi_scan_erase_peb(struct ubi_device *ubi, const struct ubi_scan_info *si,
+ int pnum, int ec)
+{
+ int err;
+ struct ubi_ec_hdr *ec_hdr;
+
+ if ((long long)ec >= UBI_MAX_ERASECOUNTER) {
+ /*
+ * Erase counter overflow. Upgrade UBI and use 64-bit
+ * erase counters internally.
+ */
+ ubi_err("erase counter overflow at PEB %d, EC %d", pnum, ec);
+ return -EINVAL;
+ }
+
+ ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
+ if (!ec_hdr)
+ return -ENOMEM;
+
+ ec_hdr->ec = cpu_to_be64(ec);
+
+ err = ubi_io_sync_erase(ubi, pnum, 0);
+ if (err < 0)
+ goto out_free;
+
+ err = ubi_io_write_ec_hdr(ubi, pnum, ec_hdr);
+
+out_free:
+ kfree(ec_hdr);
+ return err;
+}
+
+/**
+ * ubi_scan_get_free_peb - get a free physical eraseblock.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ *
+ * This function returns a free physical eraseblock. It is supposed to be
+ * called on the UBI initialization stages when the wear-leveling unit is not
+ * initialized yet. This function picks a physical eraseblocks from one of the
+ * lists, writes the EC header if it is needed, and removes it from the list.
+ *
+ * This function returns scanning physical eraseblock information in case of
+ * success and an error code in case of failure.
+ */
+struct ubi_scan_leb *ubi_scan_get_free_peb(struct ubi_device *ubi,
+ struct ubi_scan_info *si)
+{
+ int err = 0, i;
+ struct ubi_scan_leb *seb;
+
+ if (!list_empty(&si->free)) {
+ seb = list_entry(si->free.next, struct ubi_scan_leb, u.list);
+ list_del(&seb->u.list);
+ dbg_bld("return free PEB %d, EC %d", seb->pnum, seb->ec);
+ return seb;
+ }
+
+ for (i = 0; i < 2; i++) {
+ struct list_head *head;
+ struct ubi_scan_leb *tmp_seb;
+
+ if (i == 0)
+ head = &si->erase;
+ else
+ head = &si->corr;
+
+ /*
+ * We try to erase the first physical eraseblock from the @head
+ * list and pick it if we succeed, or try to erase the
+ * next one if not. And so forth. We don't want to take care
+ * about bad eraseblocks here - they'll be handled later.
+ */
+ list_for_each_entry_safe(seb, tmp_seb, head, u.list) {
+ if (seb->ec == UBI_SCAN_UNKNOWN_EC)
+ seb->ec = si->mean_ec;
+
+ err = ubi_scan_erase_peb(ubi, si, seb->pnum, seb->ec+1);
+ if (err)
+ continue;
+
+ seb->ec += 1;
+ list_del(&seb->u.list);
+ dbg_bld("return PEB %d, EC %d", seb->pnum, seb->ec);
+ return seb;
+ }
+ }
+
+ ubi_err("no eraseblocks found");
+ return ERR_PTR(-ENOSPC);
+}
+
+/**
+ * process_eb - read UBI headers, check them and add corresponding data
+ * to the scanning information.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ * @pnum: the physical eraseblock number
+ *
+ * This function returns a zero if the physical eraseblock was successfully
+ * handled and a negative error code in case of failure.
+ */
+static int process_eb(struct ubi_device *ubi, struct ubi_scan_info *si, int pnum)
+{
+ long long uninitialized_var(ec);
+ int err, bitflips = 0, vol_id, ec_corr = 0;
+
+ dbg_bld("scan PEB %d", pnum);
+
+ /* Skip bad physical eraseblocks */
+ err = ubi_io_is_bad(ubi, pnum);
+ if (err < 0)
+ return err;
+ else if (err) {
+ /*
+ * FIXME: this is actually duty of the I/O unit to initialize
+ * this, but MTD does not provide enough information.
+ */
+ si->bad_peb_count += 1;
+ return 0;
+ }
+
+ err = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
+ if (err < 0)
+ return err;
+ else if (err == UBI_IO_BITFLIPS)
+ bitflips = 1;
+ else if (err == UBI_IO_PEB_EMPTY)
+ return add_to_list(si, pnum, UBI_SCAN_UNKNOWN_EC, &si->erase);
+ else if (err == UBI_IO_BAD_EC_HDR) {
+ /*
+ * We have to also look at the VID header, possibly it is not
+ * corrupted. Set %bitflips flag in order to make this PEB be
+ * moved and EC be re-created.
+ */
+ ec_corr = 1;
+ ec = UBI_SCAN_UNKNOWN_EC;
+ bitflips = 1;
+ }
+
+ si->is_empty = 0;
+
+ if (!ec_corr) {
+ /* Make sure UBI version is OK */
+ if (ech->version != UBI_VERSION) {
+ ubi_err("this UBI version is %d, image version is %d",
+ UBI_VERSION, (int)ech->version);
+ return -EINVAL;
+ }
+
+ ec = be64_to_cpu(ech->ec);
+ if (ec > UBI_MAX_ERASECOUNTER) {
+ /*
+ * Erase counter overflow. The EC headers have 64 bits
+ * reserved, but we anyway make use of only 31 bit
+ * values, as this seems to be enough for any existing
+ * flash. Upgrade UBI and use 64-bit erase counters
+ * internally.
+ */
+ ubi_err("erase counter overflow, max is %d",
+ UBI_MAX_ERASECOUNTER);
+ ubi_dbg_dump_ec_hdr(ech);
+ return -EINVAL;
+ }
+ }
+
+ /* OK, we've done with the EC header, let's look at the VID header */
+
+ err = ubi_io_read_vid_hdr(ubi, pnum, vidh, 0);
+ if (err < 0)
+ return err;
+ else if (err == UBI_IO_BITFLIPS)
+ bitflips = 1;
+ else if (err == UBI_IO_BAD_VID_HDR ||
+ (err == UBI_IO_PEB_FREE && ec_corr)) {
+ /* VID header is corrupted */
+ err = add_to_list(si, pnum, ec, &si->corr);
+ if (err)
+ return err;
+ goto adjust_mean_ec;
+ } else if (err == UBI_IO_PEB_FREE) {
+ /* No VID header - the physical eraseblock is free */
+ err = add_to_list(si, pnum, ec, &si->free);
+ if (err)
+ return err;
+ goto adjust_mean_ec;
+ }
+
+ vol_id = be32_to_cpu(vidh->vol_id);
+ if (vol_id > UBI_MAX_VOLUMES && vol_id != UBI_LAYOUT_VOLUME_ID) {
+ int lnum = be32_to_cpu(vidh->lnum);
+
+ /* Unsupported internal volume */
+ switch (vidh->compat) {
+ case UBI_COMPAT_DELETE:
+ ubi_msg("\"delete\" compatible internal volume %d:%d"
+ " found, remove it", vol_id, lnum);
+ err = add_to_list(si, pnum, ec, &si->corr);
+ if (err)
+ return err;
+ break;
+
+ case UBI_COMPAT_RO:
+ ubi_msg("read-only compatible internal volume %d:%d"
+ " found, switch to read-only mode",
+ vol_id, lnum);
+ ubi->ro_mode = 1;
+ break;
+
+ case UBI_COMPAT_PRESERVE:
+ ubi_msg("\"preserve\" compatible internal volume %d:%d"
+ " found", vol_id, lnum);
+ err = add_to_list(si, pnum, ec, &si->alien);
+ if (err)
+ return err;
+ si->alien_peb_count += 1;
+ return 0;
+
+ case UBI_COMPAT_REJECT:
+ ubi_err("incompatible internal volume %d:%d found",
+ vol_id, lnum);
+ return -EINVAL;
+ }
+ }
+
+ /* Both UBI headers seem to be fine */
+ err = ubi_scan_add_used(ubi, si, pnum, ec, vidh, bitflips);
+ if (err)
+ return err;
+
+adjust_mean_ec:
+ if (!ec_corr) {
+ si->ec_sum += ec;
+ si->ec_count += 1;
+ if (ec > si->max_ec)
+ si->max_ec = ec;
+ if (ec < si->min_ec)
+ si->min_ec = ec;
+ }
+
+ return 0;
+}
+
+/**
+ * ubi_scan - scan an MTD device.
+ * @ubi: UBI device description object
+ *
+ * This function does full scanning of an MTD device and returns complete
+ * information about it. In case of failure, an error code is returned.
+ */
+struct ubi_scan_info *ubi_scan(struct ubi_device *ubi)
+{
+ int err, pnum;
+ struct rb_node *rb1, *rb2;
+ struct ubi_scan_volume *sv;
+ struct ubi_scan_leb *seb;
+ struct ubi_scan_info *si;
+
+ si = kzalloc(sizeof(struct ubi_scan_info), GFP_KERNEL);
+ if (!si)
+ return ERR_PTR(-ENOMEM);
+
+ INIT_LIST_HEAD(&si->corr);
+ INIT_LIST_HEAD(&si->free);
+ INIT_LIST_HEAD(&si->erase);
+ INIT_LIST_HEAD(&si->alien);
+ si->volumes = RB_ROOT;
+ si->is_empty = 1;
+
+ err = -ENOMEM;
+ ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
+ if (!ech)
+ goto out_si;
+
+ vidh = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL);
+ if (!vidh)
+ goto out_ech;
+
+ for (pnum = 0; pnum < ubi->peb_count; pnum++) {
+ cond_resched();
+
+// dbg_msg("process PEB %d", pnum);
+ err = process_eb(ubi, si, pnum);
+ if(err < 0)
+ printf("err: %d\n", err);
+ if (err < 0)
+ goto out_vidh;
+ }
+
+ dbg_msg("scanning is finished");
+
+ /* Calculate mean erase counter */
+ if (si->ec_count) {
+ do_div(si->ec_sum, si->ec_count);
+ si->mean_ec = si->ec_sum;
+ }
+
+ if (si->is_empty)
+ ubi_msg("empty MTD device detected");
+
+ /*
+ * In case of unknown erase counter we use the mean erase counter
+ * value.
+ */
+ ubi_rb_for_each_entry(rb1, sv, &si->volumes, rb) {
+ ubi_rb_for_each_entry(rb2, seb, &sv->root, u.rb)
+ if (seb->ec == UBI_SCAN_UNKNOWN_EC)
+ seb->ec = si->mean_ec;
+ }
+
+ list_for_each_entry(seb, &si->free, u.list) {
+ if (seb->ec == UBI_SCAN_UNKNOWN_EC)
+ seb->ec = si->mean_ec;
+ }
+
+ list_for_each_entry(seb, &si->corr, u.list)
+ if (seb->ec == UBI_SCAN_UNKNOWN_EC)
+ seb->ec = si->mean_ec;
+
+ list_for_each_entry(seb, &si->erase, u.list)
+ if (seb->ec == UBI_SCAN_UNKNOWN_EC)
+ seb->ec = si->mean_ec;
+
+ err = paranoid_check_si(ubi, si);
+ if (err) {
+ if (err > 0)
+ err = -EINVAL;
+ goto out_vidh;
+ }
+
+ ubi_free_vid_hdr(ubi, vidh);
+ kfree(ech);
+
+ return si;
+
+out_vidh:
+ ubi_free_vid_hdr(ubi, vidh);
+out_ech:
+ kfree(ech);
+out_si:
+ ubi_scan_destroy_si(si);
+ return ERR_PTR(err);
+}
+
+/**
+ * destroy_sv - free the scanning volume information
+ * @sv: scanning volume information
+ *
+ * This function destroys the volume RB-tree (@sv->root) and the scanning
+ * volume information.
+ */
+static void destroy_sv(struct ubi_scan_volume *sv)
+{
+ struct ubi_scan_leb *seb;
+ struct rb_node *this = sv->root.rb_node;
+
+ while (this) {
+ if (this->rb_left)
+ this = this->rb_left;
+ else if (this->rb_right)
+ this = this->rb_right;
+ else {
+ seb = rb_entry(this, struct ubi_scan_leb, u.rb);
+ this = rb_parent(this);
+ if (this) {
+ if (this->rb_left == &seb->u.rb)
+ this->rb_left = NULL;
+ else
+ this->rb_right = NULL;
+ }
+
+ kfree(seb);
+ }
+ }
+ kfree(sv);
+}
+
+/**
+ * ubi_scan_destroy_si - destroy scanning information.
+ * @si: scanning information
+ */
+void ubi_scan_destroy_si(struct ubi_scan_info *si)
+{
+ struct ubi_scan_leb *seb, *seb_tmp;
+ struct ubi_scan_volume *sv;
+ struct rb_node *rb;
+
+ list_for_each_entry_safe(seb, seb_tmp, &si->alien, u.list) {
+ list_del(&seb->u.list);
+ kfree(seb);
+ }
+ list_for_each_entry_safe(seb, seb_tmp, &si->erase, u.list) {
+ list_del(&seb->u.list);
+ kfree(seb);
+ }
+ list_for_each_entry_safe(seb, seb_tmp, &si->corr, u.list) {
+ list_del(&seb->u.list);
+ kfree(seb);
+ }
+ list_for_each_entry_safe(seb, seb_tmp, &si->free, u.list) {
+ list_del(&seb->u.list);
+ kfree(seb);
+ }
+
+ /* Destroy the volume RB-tree */
+ rb = si->volumes.rb_node;
+ while (rb) {
+ if (rb->rb_left)
+ rb = rb->rb_left;
+ else if (rb->rb_right)
+ rb = rb->rb_right;
+ else {
+ sv = rb_entry(rb, struct ubi_scan_volume, rb);
+
+ rb = rb_parent(rb);
+ if (rb) {
+ if (rb->rb_left == &sv->rb)
+ rb->rb_left = NULL;
+ else
+ rb->rb_right = NULL;
+ }
+
+ destroy_sv(sv);
+ }
+ }
+
+ kfree(si);
+}
+
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
+
+/**
+ * paranoid_check_si - check if the scanning information is correct and
+ * consistent.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ *
+ * This function returns zero if the scanning information is all right, %1 if
+ * not and a negative error code if an error occurred.
+ */
+static int paranoid_check_si(struct ubi_device *ubi, struct ubi_scan_info *si)
+{
+ int pnum, err, vols_found = 0;
+ struct rb_node *rb1, *rb2;
+ struct ubi_scan_volume *sv;
+ struct ubi_scan_leb *seb, *last_seb;
+ uint8_t *buf;
+
+ /*
+ * At first, check that scanning information is OK.
+ */
+ ubi_rb_for_each_entry(rb1, sv, &si->volumes, rb) {
+ int leb_count = 0;
+
+ cond_resched();
+
+ vols_found += 1;
+
+ if (si->is_empty) {
+ ubi_err("bad is_empty flag");
+ goto bad_sv;
+ }
+
+ if (sv->vol_id < 0 || sv->highest_lnum < 0 ||
+ sv->leb_count < 0 || sv->vol_type < 0 || sv->used_ebs < 0 ||
+ sv->data_pad < 0 || sv->last_data_size < 0) {
+ ubi_err("negative values");
+ goto bad_sv;
+ }
+
+ if (sv->vol_id >= UBI_MAX_VOLUMES &&
+ sv->vol_id < UBI_INTERNAL_VOL_START) {
+ ubi_err("bad vol_id");
+ goto bad_sv;
+ }
+
+ if (sv->vol_id > si->highest_vol_id) {
+ ubi_err("highest_vol_id is %d, but vol_id %d is there",
+ si->highest_vol_id, sv->vol_id);
+ goto out;
+ }
+
+ if (sv->vol_type != UBI_DYNAMIC_VOLUME &&
+ sv->vol_type != UBI_STATIC_VOLUME) {
+ ubi_err("bad vol_type");
+ goto bad_sv;
+ }
+
+ if (sv->data_pad > ubi->leb_size / 2) {
+ ubi_err("bad data_pad");
+ goto bad_sv;
+ }
+
+ last_seb = NULL;
+ ubi_rb_for_each_entry(rb2, seb, &sv->root, u.rb) {
+ cond_resched();
+
+ last_seb = seb;
+ leb_count += 1;
+
+ if (seb->pnum < 0 || seb->ec < 0) {
+ ubi_err("negative values");
+ goto bad_seb;
+ }
+
+ if (seb->ec < si->min_ec) {
+ ubi_err("bad si->min_ec (%d), %d found",
+ si->min_ec, seb->ec);
+ goto bad_seb;
+ }
+
+ if (seb->ec > si->max_ec) {
+ ubi_err("bad si->max_ec (%d), %d found",
+ si->max_ec, seb->ec);
+ goto bad_seb;
+ }
+
+ if (seb->pnum >= ubi->peb_count) {
+ ubi_err("too high PEB number %d, total PEBs %d",
+ seb->pnum, ubi->peb_count);
+ goto bad_seb;
+ }
+
+ if (sv->vol_type == UBI_STATIC_VOLUME) {
+ if (seb->lnum >= sv->used_ebs) {
+ ubi_err("bad lnum or used_ebs");
+ goto bad_seb;
+ }
+ } else {
+ if (sv->used_ebs != 0) {
+ ubi_err("non-zero used_ebs");
+ goto bad_seb;
+ }
+ }
+
+ if (seb->lnum > sv->highest_lnum) {
+ ubi_err("incorrect highest_lnum or lnum");
+ goto bad_seb;
+ }
+ }
+
+ if (sv->leb_count != leb_count) {
+ ubi_err("bad leb_count, %d objects in the tree",
+ leb_count);
+ goto bad_sv;
+ }
+
+ if (!last_seb)
+ continue;
+
+ seb = last_seb;
+
+ if (seb->lnum != sv->highest_lnum) {
+ ubi_err("bad highest_lnum");
+ goto bad_seb;
+ }
+ }
+
+ if (vols_found != si->vols_found) {
+ ubi_err("bad si->vols_found %d, should be %d",
+ si->vols_found, vols_found);
+ goto out;
+ }
+
+ /* Check that scanning information is correct */
+ ubi_rb_for_each_entry(rb1, sv, &si->volumes, rb) {
+ last_seb = NULL;
+ ubi_rb_for_each_entry(rb2, seb, &sv->root, u.rb) {
+ int vol_type;
+
+ cond_resched();
+
+ last_seb = seb;
+
+ err = ubi_io_read_vid_hdr(ubi, seb->pnum, vidh, 1);
+ if (err && err != UBI_IO_BITFLIPS) {
+ ubi_err("VID header is not OK (%d)", err);
+ if (err > 0)
+ err = -EIO;
+ return err;
+ }
+
+ vol_type = vidh->vol_type == UBI_VID_DYNAMIC ?
+ UBI_DYNAMIC_VOLUME : UBI_STATIC_VOLUME;
+ if (sv->vol_type != vol_type) {
+ ubi_err("bad vol_type");
+ goto bad_vid_hdr;
+ }
+
+ if (seb->sqnum != be64_to_cpu(vidh->sqnum)) {
+ ubi_err("bad sqnum %llu", seb->sqnum);
+ goto bad_vid_hdr;
+ }
+
+ if (sv->vol_id != be32_to_cpu(vidh->vol_id)) {
+ ubi_err("bad vol_id %d", sv->vol_id);
+ goto bad_vid_hdr;
+ }
+
+ if (sv->compat != vidh->compat) {
+ ubi_err("bad compat %d", vidh->compat);
+ goto bad_vid_hdr;
+ }
+
+ if (seb->lnum != be32_to_cpu(vidh->lnum)) {
+ ubi_err("bad lnum %d", seb->lnum);
+ goto bad_vid_hdr;
+ }
+
+ if (sv->used_ebs != be32_to_cpu(vidh->used_ebs)) {
+ ubi_err("bad used_ebs %d", sv->used_ebs);
+ goto bad_vid_hdr;
+ }
+
+ if (sv->data_pad != be32_to_cpu(vidh->data_pad)) {
+ ubi_err("bad data_pad %d", sv->data_pad);
+ goto bad_vid_hdr;
+ }
+
+ if (seb->leb_ver != be32_to_cpu(vidh->leb_ver)) {
+ ubi_err("bad leb_ver %u", seb->leb_ver);
+ goto bad_vid_hdr;
+ }
+ }
+
+ if (!last_seb)
+ continue;
+
+ if (sv->highest_lnum != be32_to_cpu(vidh->lnum)) {
+ ubi_err("bad highest_lnum %d", sv->highest_lnum);
+ goto bad_vid_hdr;
+ }
+
+ if (sv->last_data_size != be32_to_cpu(vidh->data_size)) {
+ ubi_err("bad last_data_size %d", sv->last_data_size);
+ goto bad_vid_hdr;
+ }
+ }
+
+ /*
+ * Make sure that all the physical eraseblocks are in one of the lists
+ * or trees.
+ */
+ buf = kzalloc(ubi->peb_count, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ for (pnum = 0; pnum < ubi->peb_count; pnum++) {
+ err = ubi_io_is_bad(ubi, pnum);
+ if (err < 0) {
+ kfree(buf);
+ return err;
+ }
+ else if (err)
+ buf[pnum] = 1;
+ }
+
+ ubi_rb_for_each_entry(rb1, sv, &si->volumes, rb)
+ ubi_rb_for_each_entry(rb2, seb, &sv->root, u.rb)
+ buf[seb->pnum] = 1;
+
+ list_for_each_entry(seb, &si->free, u.list)
+ buf[seb->pnum] = 1;
+
+ list_for_each_entry(seb, &si->corr, u.list)
+ buf[seb->pnum] = 1;
+
+ list_for_each_entry(seb, &si->erase, u.list)
+ buf[seb->pnum] = 1;
+
+ list_for_each_entry(seb, &si->alien, u.list)
+ buf[seb->pnum] = 1;
+
+ err = 0;
+ for (pnum = 0; pnum < ubi->peb_count; pnum++)
+ if (!buf[pnum]) {
+ ubi_err("PEB %d is not referred", pnum);
+ err = 1;
+ }
+
+ kfree(buf);
+ if (err)
+ goto out;
+ return 0;
+
+bad_seb:
+ ubi_err("bad scanning information about LEB %d", seb->lnum);
+ ubi_dbg_dump_seb(seb, 0);
+ ubi_dbg_dump_sv(sv);
+ goto out;
+
+bad_sv:
+ ubi_err("bad scanning information about volume %d", sv->vol_id);
+ ubi_dbg_dump_sv(sv);
+ goto out;
+
+bad_vid_hdr:
+ ubi_err("bad scanning information about volume %d", sv->vol_id);
+ ubi_dbg_dump_sv(sv);
+ ubi_dbg_dump_vid_hdr(vidh);
+
+out:
+ ubi_dbg_dump_stack();
+ return 1;
+}
+
+#endif /* CONFIG_MTD_UBI_DEBUG_PARANOID */
diff --git a/drivers/mtd/ubi/scan.h b/drivers/mtd/ubi/scan.h
new file mode 100644
index 0000000..966b9b6
--- /dev/null
+++ b/drivers/mtd/ubi/scan.h
@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+#ifndef __UBI_SCAN_H__
+#define __UBI_SCAN_H__
+
+/* The erase counter value for this physical eraseblock is unknown */
+#define UBI_SCAN_UNKNOWN_EC (-1)
+
+/**
+ * struct ubi_scan_leb - scanning information about a physical eraseblock.
+ * @ec: erase counter (%UBI_SCAN_UNKNOWN_EC if it is unknown)
+ * @pnum: physical eraseblock number
+ * @lnum: logical eraseblock number
+ * @scrub: if this physical eraseblock needs scrubbing
+ * @sqnum: sequence number
+ * @u: unions RB-tree or @list links
+ * @u.rb: link in the per-volume RB-tree of &struct ubi_scan_leb objects
+ * @u.list: link in one of the eraseblock lists
+ * @leb_ver: logical eraseblock version (obsolete)
+ *
+ * One object of this type is allocated for each physical eraseblock during
+ * scanning.
+ */
+struct ubi_scan_leb {
+ int ec;
+ int pnum;
+ int lnum;
+ int scrub;
+ unsigned long long sqnum;
+ union {
+ struct rb_node rb;
+ struct list_head list;
+ } u;
+ uint32_t leb_ver;
+};
+
+/**
+ * struct ubi_scan_volume - scanning information about a volume.
+ * @vol_id: volume ID
+ * @highest_lnum: highest logical eraseblock number in this volume
+ * @leb_count: number of logical eraseblocks in this volume
+ * @vol_type: volume type
+ * @used_ebs: number of used logical eraseblocks in this volume (only for
+ * static volumes)
+ * @last_data_size: amount of data in the last logical eraseblock of this
+ * volume (always equivalent to the usable logical eraseblock size in case of
+ * dynamic volumes)
+ * @data_pad: how many bytes at the end of logical eraseblocks of this volume
+ * are not used (due to volume alignment)
+ * @compat: compatibility flags of this volume
+ * @rb: link in the volume RB-tree
+ * @root: root of the RB-tree containing all the eraseblock belonging to this
+ * volume (&struct ubi_scan_leb objects)
+ *
+ * One object of this type is allocated for each volume during scanning.
+ */
+struct ubi_scan_volume {
+ int vol_id;
+ int highest_lnum;
+ int leb_count;
+ int vol_type;
+ int used_ebs;
+ int last_data_size;
+ int data_pad;
+ int compat;
+ struct rb_node rb;
+ struct rb_root root;
+};
+
+/**
+ * struct ubi_scan_info - UBI scanning information.
+ * @volumes: root of the volume RB-tree
+ * @corr: list of corrupted physical eraseblocks
+ * @free: list of free physical eraseblocks
+ * @erase: list of physical eraseblocks which have to be erased
+ * @alien: list of physical eraseblocks which should not be used by UBI (e.g.,
+ * @bad_peb_count: count of bad physical eraseblocks
+ * those belonging to "preserve"-compatible internal volumes)
+ * @vols_found: number of volumes found during scanning
+ * @highest_vol_id: highest volume ID
+ * @alien_peb_count: count of physical eraseblocks in the @alien list
+ * @is_empty: flag indicating whether the MTD device is empty or not
+ * @min_ec: lowest erase counter value
+ * @max_ec: highest erase counter value
+ * @max_sqnum: highest sequence number value
+ * @mean_ec: mean erase counter value
+ * @ec_sum: a temporary variable used when calculating @mean_ec
+ * @ec_count: a temporary variable used when calculating @mean_ec
+ *
+ * This data structure contains the result of scanning and may be used by other
+ * UBI units to build final UBI data structures, further error-recovery and so
+ * on.
+ */
+struct ubi_scan_info {
+ struct rb_root volumes;
+ struct list_head corr;
+ struct list_head free;
+ struct list_head erase;
+ struct list_head alien;
+ int bad_peb_count;
+ int vols_found;
+ int highest_vol_id;
+ int alien_peb_count;
+ int is_empty;
+ int min_ec;
+ int max_ec;
+ unsigned long long max_sqnum;
+ int mean_ec;
+ uint64_t ec_sum;
+ int ec_count;
+};
+
+struct ubi_device;
+struct ubi_vid_hdr;
+
+/*
+ * ubi_scan_move_to_list - move a physical eraseblock from the volume tree to a
+ * list.
+ *
+ * @sv: volume scanning information
+ * @seb: scanning eraseblock infprmation
+ * @list: the list to move to
+ */
+static inline void ubi_scan_move_to_list(struct ubi_scan_volume *sv,
+ struct ubi_scan_leb *seb,
+ struct list_head *list)
+{
+ rb_erase(&seb->u.rb, &sv->root);
+ list_add_tail(&seb->u.list, list);
+}
+
+int ubi_scan_add_used(struct ubi_device *ubi, struct ubi_scan_info *si,
+ int pnum, int ec, const struct ubi_vid_hdr *vid_hdr,
+ int bitflips);
+struct ubi_scan_volume *ubi_scan_find_sv(const struct ubi_scan_info *si,
+ int vol_id);
+struct ubi_scan_leb *ubi_scan_find_seb(const struct ubi_scan_volume *sv,
+ int lnum);
+void ubi_scan_rm_volume(struct ubi_scan_info *si, struct ubi_scan_volume *sv);
+struct ubi_scan_leb *ubi_scan_get_free_peb(struct ubi_device *ubi,
+ struct ubi_scan_info *si);
+int ubi_scan_erase_peb(struct ubi_device *ubi, const struct ubi_scan_info *si,
+ int pnum, int ec);
+struct ubi_scan_info *ubi_scan(struct ubi_device *ubi);
+void ubi_scan_destroy_si(struct ubi_scan_info *si);
+
+#endif /* !__UBI_SCAN_H__ */
diff --git a/drivers/mtd/ubi/ubi-barebox.h b/drivers/mtd/ubi/ubi-barebox.h
new file mode 100644
index 0000000..84c589f
--- /dev/null
+++ b/drivers/mtd/ubi/ubi-barebox.h
@@ -0,0 +1,191 @@
+/*
+ * Header file for UBI support for U-Boot
+ *
+ * Adaptation from kernel to U-Boot
+ *
+ * Copyright (C) 2005-2007 Samsung Electronics
+ * Kyungmin Park <kyungmin.park@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __UBOOT_UBI_H
+#define __UBOOT_UBI_H
+
+#include <common.h>
+#include <malloc.h>
+#include <asm-generic/div64.h>
+#include <errno.h>
+#include <linux/err.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/rbtree.h>
+#include <linux/string.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/ubi.h>
+
+#define crc32(seed, data, length) crc32_no_comp(seed, (unsigned char const *)data, length)
+
+#define DPRINTK(format, args...) \
+do { \
+ printf("%s[%d]: " format "\n", __func__, __LINE__, ##args); \
+} while (0)
+
+/* configurable */
+#define CONFIG_MTD_UBI_WL_THRESHOLD 4096
+#define CONFIG_MTD_UBI_BEB_RESERVE 1
+#define UBI_IO_DEBUG 0
+
+/* debug options (Linux: drivers/mtd/ubi/Kconfig.debug) */
+#undef CONFIG_MTD_UBI_DEBUG
+#undef CONFIG_MTD_UBI_DEBUG_PARANOID
+#undef CONFIG_MTD_UBI_DEBUG_MSG
+#undef CONFIG_MTD_UBI_DEBUG_MSG_EBA
+#undef CONFIG_MTD_UBI_DEBUG_MSG_WL
+#undef CONFIG_MTD_UBI_DEBUG_MSG_IO
+#undef CONFIG_MTD_UBI_DEBUG_MSG_BLD
+#define CONFIG_MTD_UBI_DEBUG_DISABLE_BGT
+
+/* build.c */
+#define get_device(...)
+#define put_device(...)
+#define ubi_sysfs_init(...) 0
+#define ubi_sysfs_close(...) do { } while (0)
+static inline int is_power_of_2(unsigned long n)
+{
+ return (n != 0 && ((n & (n - 1)) == 0));
+}
+
+/* FIXME */
+#define MKDEV(...) 0
+#define MAJOR(dev) 0
+#define MINOR(dev) 0
+
+#define alloc_chrdev_region(...) 0
+#define unregister_chrdev_region(...)
+
+#define class_create(...) __builtin_return_address(0)
+#define class_create_file(...) 0
+#define class_remove_file(...)
+#define class_destroy(...)
+#define misc_register(...) 0
+#define misc_deregister(...)
+
+/* vmt.c */
+#define device_register(...) 0
+#define volume_sysfs_init(...) 0
+#define volume_sysfs_close(...) do { } while (0)
+
+/* kapi.c */
+
+/* eba.c */
+
+/* io.c */
+#define init_waitqueue_head(...) do { } while (0)
+#define wait_event_interruptible(...) 0
+#define wake_up_interruptible(...) do { } while (0)
+#define print_hex_dump(...) do { } while (0)
+#define dump_stack(...) do { } while (0)
+
+/* wl.c */
+#define task_pid_nr(x) 0
+#define set_freezable(...) do { } while (0)
+#define try_to_freeze(...) 0
+#define set_current_state(...) do { } while (0)
+#define kthread_should_stop(...) 0
+#define schedule() do { } while (0)
+
+/* upd.c */
+static inline unsigned long copy_from_user(void *dest, const void *src,
+ unsigned long count)
+{
+ memcpy((void *)dest, (void *)src, count);
+ return 0;
+}
+
+/* common */
+typedef int spinlock_t;
+typedef int wait_queue_head_t;
+#define spin_lock_init(...)
+#define spin_lock(...)
+#define spin_unlock(...)
+
+#define mutex_init(...)
+#define mutex_lock(...)
+#define mutex_unlock(...)
+
+#define init_rwsem(...) do { } while (0)
+#define down_read(...) do { } while (0)
+#define down_write(...) do { } while (0)
+#define down_write_trylock(...) 1
+#define up_read(...) do { } while (0)
+#define up_write(...) do { } while (0)
+
+struct kmem_cache { int i; };
+#define kmem_cache_create(...) 1
+#define kmem_cache_alloc(obj, gfp) malloc(sizeof(struct ubi_wl_entry))
+#define kmem_cache_free(obj, size) free(size)
+#define kmem_cache_destroy(...)
+
+#define cond_resched() do { } while (0)
+#define yield() do { } while (0)
+
+#define GFP_KERNEL 0
+#define GFP_NOFS 1
+
+#define __user
+#define __init
+#define __exit
+
+#define kthread_create(...) __builtin_return_address(0)
+#define kthread_stop(...) do { } while (0)
+#define wake_up_process(...) do { } while (0)
+
+#define BUS_ID_SIZE 20
+
+struct rw_semaphore { int i; };
+struct device {
+ struct device *parent;
+ struct class *class;
+ char bus_id[BUS_ID_SIZE]; /* position on parent bus */
+ dev_t devt; /* dev_t, creates the sysfs "dev" */
+ void (*release)(struct device *dev);
+};
+struct mutex { int i; };
+struct kernel_param { int i; };
+
+struct cdev_ {
+ int owner;
+ dev_t dev;
+};
+#define cdev_init(...) do { } while (0)
+#define cdev_add(...) 0
+#define cdev_del(...) do { } while (0)
+
+#define MAX_ERRNO 4095
+
+/* module */
+#define THIS_MODULE 0
+#define try_module_get(...) 1
+#define module_put(...) do { } while (0)
+#define module_init(...)
+#define module_exit(...)
+#define EXPORT_SYMBOL_GPL(...)
+#define module_param_call(...)
+#define MODULE_PARM_DESC(...)
+#define MODULE_VERSION(...)
+
+#ifndef __UBIFS_H__
+#include "ubi.h"
+#endif
+
+/* functions */
+extern int ubi_mtd_param_parse(const char *val, struct kernel_param *kp);
+extern int ubi_init(void);
+extern void ubi_exit(void);
+
+extern struct ubi_device *ubi_devices[];
+
+#endif
diff --git a/drivers/mtd/ubi/ubi-media.h b/drivers/mtd/ubi/ubi-media.h
new file mode 100644
index 0000000..c3185d9
--- /dev/null
+++ b/drivers/mtd/ubi/ubi-media.h
@@ -0,0 +1,372 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Authors: Artem Bityutskiy (���������������� ����������)
+ * Thomas Gleixner
+ * Frank Haverkamp
+ * Oliver Lohmann
+ * Andreas Arnez
+ */
+
+/*
+ * This file defines the layout of UBI headers and all the other UBI on-flash
+ * data structures.
+ */
+
+#ifndef __UBI_MEDIA_H__
+#define __UBI_MEDIA_H__
+
+#include <asm/byteorder.h>
+
+/* The version of UBI images supported by this implementation */
+#define UBI_VERSION 1
+
+/* The highest erase counter value supported by this implementation */
+#define UBI_MAX_ERASECOUNTER 0x7FFFFFFF
+
+/* The initial CRC32 value used when calculating CRC checksums */
+#define UBI_CRC32_INIT 0xFFFFFFFFU
+
+/* Erase counter header magic number (ASCII "UBI#") */
+#define UBI_EC_HDR_MAGIC 0x55424923
+/* Volume identifier header magic number (ASCII "UBI!") */
+#define UBI_VID_HDR_MAGIC 0x55424921
+
+/*
+ * Volume type constants used in the volume identifier header.
+ *
+ * @UBI_VID_DYNAMIC: dynamic volume
+ * @UBI_VID_STATIC: static volume
+ */
+enum {
+ UBI_VID_DYNAMIC = 1,
+ UBI_VID_STATIC = 2
+};
+
+/*
+ * Volume flags used in the volume table record.
+ *
+ * @UBI_VTBL_AUTORESIZE_FLG: auto-resize this volume
+ *
+ * %UBI_VTBL_AUTORESIZE_FLG flag can be set only for one volume in the volume
+ * table. UBI automatically re-sizes the volume which has this flag and makes
+ * the volume to be of largest possible size. This means that if after the
+ * initialization UBI finds out that there are available physical eraseblocks
+ * present on the device, it automatically appends all of them to the volume
+ * (the physical eraseblocks reserved for bad eraseblocks handling and other
+ * reserved physical eraseblocks are not taken). So, if there is a volume with
+ * the %UBI_VTBL_AUTORESIZE_FLG flag set, the amount of available logical
+ * eraseblocks will be zero after UBI is loaded, because all of them will be
+ * reserved for this volume. Note, the %UBI_VTBL_AUTORESIZE_FLG bit is cleared
+ * after the volume had been initialized.
+ *
+ * The auto-resize feature is useful for device production purposes. For
+ * example, different NAND flash chips may have different amount of initial bad
+ * eraseblocks, depending of particular chip instance. Manufacturers of NAND
+ * chips usually guarantee that the amount of initial bad eraseblocks does not
+ * exceed certain percent, e.g. 2%. When one creates an UBI image which will be
+ * flashed to the end devices in production, he does not know the exact amount
+ * of good physical eraseblocks the NAND chip on the device will have, but this
+ * number is required to calculate the volume sized and put them to the volume
+ * table of the UBI image. In this case, one of the volumes (e.g., the one
+ * which will store the root file system) is marked as "auto-resizable", and
+ * UBI will adjust its size on the first boot if needed.
+ *
+ * Note, first UBI reserves some amount of physical eraseblocks for bad
+ * eraseblock handling, and then re-sizes the volume, not vice-versa. This
+ * means that the pool of reserved physical eraseblocks will always be present.
+ */
+enum {
+ UBI_VTBL_AUTORESIZE_FLG = 0x01,
+};
+
+/*
+ * Compatibility constants used by internal volumes.
+ *
+ * @UBI_COMPAT_DELETE: delete this internal volume before anything is written
+ * to the flash
+ * @UBI_COMPAT_RO: attach this device in read-only mode
+ * @UBI_COMPAT_PRESERVE: preserve this internal volume - do not touch its
+ * physical eraseblocks, don't allow the wear-leveling unit to move them
+ * @UBI_COMPAT_REJECT: reject this UBI image
+ */
+enum {
+ UBI_COMPAT_DELETE = 1,
+ UBI_COMPAT_RO = 2,
+ UBI_COMPAT_PRESERVE = 4,
+ UBI_COMPAT_REJECT = 5
+};
+
+/* Sizes of UBI headers */
+#define UBI_EC_HDR_SIZE sizeof(struct ubi_ec_hdr)
+#define UBI_VID_HDR_SIZE sizeof(struct ubi_vid_hdr)
+
+/* Sizes of UBI headers without the ending CRC */
+#define UBI_EC_HDR_SIZE_CRC (UBI_EC_HDR_SIZE - sizeof(__be32))
+#define UBI_VID_HDR_SIZE_CRC (UBI_VID_HDR_SIZE - sizeof(__be32))
+
+/**
+ * struct ubi_ec_hdr - UBI erase counter header.
+ * @magic: erase counter header magic number (%UBI_EC_HDR_MAGIC)
+ * @version: version of UBI implementation which is supposed to accept this
+ * UBI image
+ * @padding1: reserved for future, zeroes
+ * @ec: the erase counter
+ * @vid_hdr_offset: where the VID header starts
+ * @data_offset: where the user data start
+ * @padding2: reserved for future, zeroes
+ * @hdr_crc: erase counter header CRC checksum
+ *
+ * The erase counter header takes 64 bytes and has a plenty of unused space for
+ * future usage. The unused fields are zeroed. The @version field is used to
+ * indicate the version of UBI implementation which is supposed to be able to
+ * work with this UBI image. If @version is greater then the current UBI
+ * version, the image is rejected. This may be useful in future if something
+ * is changed radically. This field is duplicated in the volume identifier
+ * header.
+ *
+ * The @vid_hdr_offset and @data_offset fields contain the offset of the the
+ * volume identifier header and user data, relative to the beginning of the
+ * physical eraseblock. These values have to be the same for all physical
+ * eraseblocks.
+ */
+struct ubi_ec_hdr {
+ __be32 magic;
+ __u8 version;
+ __u8 padding1[3];
+ __be64 ec; /* Warning: the current limit is 31-bit anyway! */
+ __be32 vid_hdr_offset;
+ __be32 data_offset;
+ __u8 padding2[36];
+ __be32 hdr_crc;
+} __attribute__ ((packed));
+
+/**
+ * struct ubi_vid_hdr - on-flash UBI volume identifier header.
+ * @magic: volume identifier header magic number (%UBI_VID_HDR_MAGIC)
+ * @version: UBI implementation version which is supposed to accept this UBI
+ * image (%UBI_VERSION)
+ * @vol_type: volume type (%UBI_VID_DYNAMIC or %UBI_VID_STATIC)
+ * @copy_flag: if this logical eraseblock was copied from another physical
+ * eraseblock (for wear-leveling reasons)
+ * @compat: compatibility of this volume (%0, %UBI_COMPAT_DELETE,
+ * %UBI_COMPAT_IGNORE, %UBI_COMPAT_PRESERVE, or %UBI_COMPAT_REJECT)
+ * @vol_id: ID of this volume
+ * @lnum: logical eraseblock number
+ * @leb_ver: version of this logical eraseblock (IMPORTANT: obsolete, to be
+ * removed, kept only for not breaking older UBI users)
+ * @data_size: how many bytes of data this logical eraseblock contains
+ * @used_ebs: total number of used logical eraseblocks in this volume
+ * @data_pad: how many bytes at the end of this physical eraseblock are not
+ * used
+ * @data_crc: CRC checksum of the data stored in this logical eraseblock
+ * @padding1: reserved for future, zeroes
+ * @sqnum: sequence number
+ * @padding2: reserved for future, zeroes
+ * @hdr_crc: volume identifier header CRC checksum
+ *
+ * The @sqnum is the value of the global sequence counter at the time when this
+ * VID header was created. The global sequence counter is incremented each time
+ * UBI writes a new VID header to the flash, i.e. when it maps a logical
+ * eraseblock to a new physical eraseblock. The global sequence counter is an
+ * unsigned 64-bit integer and we assume it never overflows. The @sqnum
+ * (sequence number) is used to distinguish between older and newer versions of
+ * logical eraseblocks.
+ *
+ * There are 2 situations when there may be more then one physical eraseblock
+ * corresponding to the same logical eraseblock, i.e., having the same @vol_id
+ * and @lnum values in the volume identifier header. Suppose we have a logical
+ * eraseblock L and it is mapped to the physical eraseblock P.
+ *
+ * 1. Because UBI may erase physical eraseblocks asynchronously, the following
+ * situation is possible: L is asynchronously erased, so P is scheduled for
+ * erasure, then L is written to,i.e. mapped to another physical eraseblock P1,
+ * so P1 is written to, then an unclean reboot happens. Result - there are 2
+ * physical eraseblocks P and P1 corresponding to the same logical eraseblock
+ * L. But P1 has greater sequence number, so UBI picks P1 when it attaches the
+ * flash.
+ *
+ * 2. From time to time UBI moves logical eraseblocks to other physical
+ * eraseblocks for wear-leveling reasons. If, for example, UBI moves L from P
+ * to P1, and an unclean reboot happens before P is physically erased, there
+ * are two physical eraseblocks P and P1 corresponding to L and UBI has to
+ * select one of them when the flash is attached. The @sqnum field says which
+ * PEB is the original (obviously P will have lower @sqnum) and the copy. But
+ * it is not enough to select the physical eraseblock with the higher sequence
+ * number, because the unclean reboot could have happen in the middle of the
+ * copying process, so the data in P is corrupted. It is also not enough to
+ * just select the physical eraseblock with lower sequence number, because the
+ * data there may be old (consider a case if more data was added to P1 after
+ * the copying). Moreover, the unclean reboot may happen when the erasure of P
+ * was just started, so it result in unstable P, which is "mostly" OK, but
+ * still has unstable bits.
+ *
+ * UBI uses the @copy_flag field to indicate that this logical eraseblock is a
+ * copy. UBI also calculates data CRC when the data is moved and stores it at
+ * the @data_crc field of the copy (P1). So when UBI needs to pick one physical
+ * eraseblock of two (P or P1), the @copy_flag of the newer one (P1) is
+ * examined. If it is cleared, the situation* is simple and the newer one is
+ * picked. If it is set, the data CRC of the copy (P1) is examined. If the CRC
+ * checksum is correct, this physical eraseblock is selected (P1). Otherwise
+ * the older one (P) is selected.
+ *
+ * Note, there is an obsolete @leb_ver field which was used instead of @sqnum
+ * in the past. But it is not used anymore and we keep it in order to be able
+ * to deal with old UBI images. It will be removed at some point.
+ *
+ * There are 2 sorts of volumes in UBI: user volumes and internal volumes.
+ * Internal volumes are not seen from outside and are used for various internal
+ * UBI purposes. In this implementation there is only one internal volume - the
+ * layout volume. Internal volumes are the main mechanism of UBI extensions.
+ * For example, in future one may introduce a journal internal volume. Internal
+ * volumes have their own reserved range of IDs.
+ *
+ * The @compat field is only used for internal volumes and contains the "degree
+ * of their compatibility". It is always zero for user volumes. This field
+ * provides a mechanism to introduce UBI extensions and to be still compatible
+ * with older UBI binaries. For example, if someone introduced a journal in
+ * future, he would probably use %UBI_COMPAT_DELETE compatibility for the
+ * journal volume. And in this case, older UBI binaries, which know nothing
+ * about the journal volume, would just delete this volume and work perfectly
+ * fine. This is similar to what Ext2fs does when it is fed by an Ext3fs image
+ * - it just ignores the Ext3fs journal.
+ *
+ * The @data_crc field contains the CRC checksum of the contents of the logical
+ * eraseblock if this is a static volume. In case of dynamic volumes, it does
+ * not contain the CRC checksum as a rule. The only exception is when the
+ * data of the physical eraseblock was moved by the wear-leveling unit, then
+ * the wear-leveling unit calculates the data CRC and stores it in the
+ * @data_crc field. And of course, the @copy_flag is %in this case.
+ *
+ * The @data_size field is used only for static volumes because UBI has to know
+ * how many bytes of data are stored in this eraseblock. For dynamic volumes,
+ * this field usually contains zero. The only exception is when the data of the
+ * physical eraseblock was moved to another physical eraseblock for
+ * wear-leveling reasons. In this case, UBI calculates CRC checksum of the
+ * contents and uses both @data_crc and @data_size fields. In this case, the
+ * @data_size field contains data size.
+ *
+ * The @used_ebs field is used only for static volumes and indicates how many
+ * eraseblocks the data of the volume takes. For dynamic volumes this field is
+ * not used and always contains zero.
+ *
+ * The @data_pad is calculated when volumes are created using the alignment
+ * parameter. So, effectively, the @data_pad field reduces the size of logical
+ * eraseblocks of this volume. This is very handy when one uses block-oriented
+ * software (say, cramfs) on top of the UBI volume.
+ */
+struct ubi_vid_hdr {
+ __be32 magic;
+ __u8 version;
+ __u8 vol_type;
+ __u8 copy_flag;
+ __u8 compat;
+ __be32 vol_id;
+ __be32 lnum;
+ __be32 leb_ver; /* obsolete, to be removed, don't use */
+ __be32 data_size;
+ __be32 used_ebs;
+ __be32 data_pad;
+ __be32 data_crc;
+ __u8 padding1[4];
+ __be64 sqnum;
+ __u8 padding2[12];
+ __be32 hdr_crc;
+} __attribute__ ((packed));
+
+/* Internal UBI volumes count */
+#define UBI_INT_VOL_COUNT 1
+
+/*
+ * Starting ID of internal volumes. There is reserved room for 4096 internal
+ * volumes.
+ */
+#define UBI_INTERNAL_VOL_START (0x7FFFFFFF - 4096)
+
+/* The layout volume contains the volume table */
+
+#define UBI_LAYOUT_VOLUME_ID UBI_INTERNAL_VOL_START
+#define UBI_LAYOUT_VOLUME_TYPE UBI_VID_DYNAMIC
+#define UBI_LAYOUT_VOLUME_ALIGN 1
+#define UBI_LAYOUT_VOLUME_EBS 2
+#define UBI_LAYOUT_VOLUME_NAME "layout volume"
+#define UBI_LAYOUT_VOLUME_COMPAT UBI_COMPAT_REJECT
+
+/* The maximum number of volumes per one UBI device */
+#define UBI_MAX_VOLUMES 128
+
+/* The maximum volume name length */
+#define UBI_VOL_NAME_MAX 127
+
+/* Size of the volume table record */
+#define UBI_VTBL_RECORD_SIZE sizeof(struct ubi_vtbl_record)
+
+/* Size of the volume table record without the ending CRC */
+#define UBI_VTBL_RECORD_SIZE_CRC (UBI_VTBL_RECORD_SIZE - sizeof(__be32))
+
+/**
+ * struct ubi_vtbl_record - a record in the volume table.
+ * @reserved_pebs: how many physical eraseblocks are reserved for this volume
+ * @alignment: volume alignment
+ * @data_pad: how many bytes are unused at the end of the each physical
+ * eraseblock to satisfy the requested alignment
+ * @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
+ * @upd_marker: if volume update was started but not finished
+ * @name_len: volume name length
+ * @name: the volume name
+ * @flags: volume flags (%UBI_VTBL_AUTORESIZE_FLG)
+ * @padding: reserved, zeroes
+ * @crc: a CRC32 checksum of the record
+ *
+ * The volume table records are stored in the volume table, which is stored in
+ * the layout volume. The layout volume consists of 2 logical eraseblock, each
+ * of which contains a copy of the volume table (i.e., the volume table is
+ * duplicated). The volume table is an array of &struct ubi_vtbl_record
+ * objects indexed by the volume ID.
+ *
+ * If the size of the logical eraseblock is large enough to fit
+ * %UBI_MAX_VOLUMES records, the volume table contains %UBI_MAX_VOLUMES
+ * records. Otherwise, it contains as many records as it can fit (i.e., size of
+ * logical eraseblock divided by sizeof(struct ubi_vtbl_record)).
+ *
+ * The @upd_marker flag is used to implement volume update. It is set to %1
+ * before update and set to %0 after the update. So if the update operation was
+ * interrupted, UBI knows that the volume is corrupted.
+ *
+ * The @alignment field is specified when the volume is created and cannot be
+ * later changed. It may be useful, for example, when a block-oriented file
+ * system works on top of UBI. The @data_pad field is calculated using the
+ * logical eraseblock size and @alignment. The alignment must be multiple to the
+ * minimal flash I/O unit. If @alignment is 1, all the available space of
+ * the physical eraseblocks is used.
+ *
+ * Empty records contain all zeroes and the CRC checksum of those zeroes.
+ */
+struct ubi_vtbl_record {
+ __be32 reserved_pebs;
+ __be32 alignment;
+ __be32 data_pad;
+ __u8 vol_type;
+ __u8 upd_marker;
+ __be16 name_len;
+ __u8 name[UBI_VOL_NAME_MAX+1];
+ __u8 flags;
+ __u8 padding[23];
+ __be32 crc;
+} __attribute__ ((packed));
+
+#endif /* !__UBI_MEDIA_H__ */
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
new file mode 100644
index 0000000..358c8dc
--- /dev/null
+++ b/drivers/mtd/ubi/ubi.h
@@ -0,0 +1,641 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ * Copyright (c) Nokia Corporation, 2006, 2007
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+#ifndef __UBI_UBI_H__
+#define __UBI_UBI_H__
+
+#ifdef UBI_LINUX
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/rbtree.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/mutex.h>
+#include <linux/rwsem.h>
+#include <linux/spinlock.h>
+#include <linux/fs.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/string.h>
+#include <linux/vmalloc.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/ubi.h>
+#endif
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/rbtree.h>
+#include <linux/string.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/ubi.h>
+
+#include "ubi-media.h"
+#include "scan.h"
+#include "debug.h"
+
+/* Maximum number of supported UBI devices */
+#define UBI_MAX_DEVICES 32
+
+/* UBI name used for character devices, sysfs, etc */
+#define UBI_NAME_STR "ubi"
+
+/* Normal UBI messages */
+#define ubi_msg(fmt, ...) printk(KERN_NOTICE "UBI: " fmt "\n", ##__VA_ARGS__)
+/* UBI warning messages */
+#define ubi_warn(fmt, ...) printk(KERN_WARNING "UBI warning: %s: " fmt "\n", \
+ __func__, ##__VA_ARGS__)
+/* UBI error messages */
+#define ubi_err(fmt, ...) printk(KERN_ERR "UBI error: %s: " fmt "\n", \
+ __func__, ##__VA_ARGS__)
+
+/* Lowest number PEBs reserved for bad PEB handling */
+#define MIN_RESEVED_PEBS 2
+
+/* Background thread name pattern */
+#define UBI_BGT_NAME_PATTERN "ubi_bgt%dd"
+
+/* This marker in the EBA table means that the LEB is um-mapped */
+#define UBI_LEB_UNMAPPED -1
+
+/*
+ * In case of errors, UBI tries to repeat the operation several times before
+ * returning error. The below constant defines how many times UBI re-tries.
+ */
+#define UBI_IO_RETRIES 3
+
+/*
+ * Error codes returned by the I/O unit.
+ *
+ * UBI_IO_PEB_EMPTY: the physical eraseblock is empty, i.e. it contains only
+ * 0xFF bytes
+ * UBI_IO_PEB_FREE: the physical eraseblock is free, i.e. it contains only a
+ * valid erase counter header, and the rest are %0xFF bytes
+ * UBI_IO_BAD_EC_HDR: the erase counter header is corrupted (bad magic or CRC)
+ * UBI_IO_BAD_VID_HDR: the volume identifier header is corrupted (bad magic or
+ * CRC)
+ * UBI_IO_BITFLIPS: bit-flips were detected and corrected
+ */
+enum {
+ UBI_IO_PEB_EMPTY = 1,
+ UBI_IO_PEB_FREE,
+ UBI_IO_BAD_EC_HDR,
+ UBI_IO_BAD_VID_HDR,
+ UBI_IO_BITFLIPS
+};
+
+/**
+ * struct ubi_wl_entry - wear-leveling entry.
+ * @rb: link in the corresponding RB-tree
+ * @ec: erase counter
+ * @pnum: physical eraseblock number
+ *
+ * This data structure is used in the WL unit. Each physical eraseblock has a
+ * corresponding &struct wl_entry object which may be kept in different
+ * RB-trees. See WL unit for details.
+ */
+struct ubi_wl_entry {
+ struct rb_node rb;
+ int ec;
+ int pnum;
+};
+
+/**
+ * struct ubi_ltree_entry - an entry in the lock tree.
+ * @rb: links RB-tree nodes
+ * @vol_id: volume ID of the locked logical eraseblock
+ * @lnum: locked logical eraseblock number
+ * @users: how many tasks are using this logical eraseblock or wait for it
+ * @mutex: read/write mutex to implement read/write access serialization to
+ * the (@vol_id, @lnum) logical eraseblock
+ *
+ * This data structure is used in the EBA unit to implement per-LEB locking.
+ * When a logical eraseblock is being locked - corresponding
+ * &struct ubi_ltree_entry object is inserted to the lock tree (@ubi->ltree).
+ * See EBA unit for details.
+ */
+struct ubi_ltree_entry {
+ struct rb_node rb;
+ int vol_id;
+ int lnum;
+ int users;
+ struct rw_semaphore mutex;
+};
+
+struct ubi_volume_desc;
+
+/**
+ * struct ubi_volume - UBI volume description data structure.
+ * @dev: device object to make use of the the Linux device model
+ * @cdev: character device object to create character device
+ * @ubi: reference to the UBI device description object
+ * @vol_id: volume ID
+ * @ref_count: volume reference count
+ * @readers: number of users holding this volume in read-only mode
+ * @writers: number of users holding this volume in read-write mode
+ * @exclusive: whether somebody holds this volume in exclusive mode
+ *
+ * @reserved_pebs: how many physical eraseblocks are reserved for this volume
+ * @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
+ * @usable_leb_size: logical eraseblock size without padding
+ * @used_ebs: how many logical eraseblocks in this volume contain data
+ * @last_eb_bytes: how many bytes are stored in the last logical eraseblock
+ * @used_bytes: how many bytes of data this volume contains
+ * @alignment: volume alignment
+ * @data_pad: how many bytes are not used at the end of physical eraseblocks to
+ * satisfy the requested alignment
+ * @name_len: volume name length
+ * @name: volume name
+ *
+ * @upd_ebs: how many eraseblocks are expected to be updated
+ * @ch_lnum: LEB number which is being changing by the atomic LEB change
+ * operation
+ * @ch_dtype: data persistency type which is being changing by the atomic LEB
+ * change operation
+ * @upd_bytes: how many bytes are expected to be received for volume update or
+ * atomic LEB change
+ * @upd_received: how many bytes were already received for volume update or
+ * atomic LEB change
+ * @upd_buf: update buffer which is used to collect update data or data for
+ * atomic LEB change
+ *
+ * @eba_tbl: EBA table of this volume (LEB->PEB mapping)
+ * @checked: %1 if this static volume was checked
+ * @corrupted: %1 if the volume is corrupted (static volumes only)
+ * @upd_marker: %1 if the update marker is set for this volume
+ * @updating: %1 if the volume is being updated
+ * @changing_leb: %1 if the atomic LEB change ioctl command is in progress
+ *
+ * @gluebi_desc: gluebi UBI volume descriptor
+ * @gluebi_refcount: reference count of the gluebi MTD device
+ * @gluebi_mtd: MTD device description object of the gluebi MTD device
+ *
+ * The @corrupted field indicates that the volume's contents is corrupted.
+ * Since UBI protects only static volumes, this field is not relevant to
+ * dynamic volumes - it is user's responsibility to assure their data
+ * integrity.
+ *
+ * The @upd_marker flag indicates that this volume is either being updated at
+ * the moment or is damaged because of an unclean reboot.
+ */
+struct ubi_volume {
+ struct device dev;
+ struct cdev cdev;
+ struct ubi_device *ubi;
+ int vol_id;
+ int ref_count;
+ int readers;
+ int writers;
+ int exclusive;
+
+ int reserved_pebs;
+ int vol_type;
+ int usable_leb_size;
+ int used_ebs;
+ int last_eb_bytes;
+ long long used_bytes;
+ int alignment;
+ int data_pad;
+ int name_len;
+ char name[UBI_VOL_NAME_MAX+1];
+
+ int upd_ebs;
+ int ch_lnum;
+ int ch_dtype;
+ long long upd_bytes;
+ long long upd_received;
+ void *upd_buf;
+
+ int *eba_tbl;
+ unsigned int checked:1;
+ unsigned int corrupted:1;
+ unsigned int upd_marker:1;
+ unsigned int updating:1;
+ unsigned int changing_leb:1;
+
+#ifdef CONFIG_MTD_UBI_GLUEBI
+ /*
+ * Gluebi-related stuff may be compiled out.
+ * TODO: this should not be built into UBI but should be a separate
+ * ubimtd driver which works on top of UBI and emulates MTD devices.
+ */
+ struct ubi_volume_desc *gluebi_desc;
+ int gluebi_refcount;
+ struct mtd_info gluebi_mtd;
+#endif
+};
+
+/**
+ * struct ubi_volume_desc - descriptor of the UBI volume returned when it is
+ * opened.
+ * @vol: reference to the corresponding volume description object
+ * @mode: open mode (%UBI_READONLY, %UBI_READWRITE, or %UBI_EXCLUSIVE)
+ */
+struct ubi_volume_desc {
+ struct ubi_volume *vol;
+ int mode;
+};
+
+struct ubi_wl_entry;
+
+/**
+ * struct ubi_device - UBI device description structure
+ * @dev: UBI device object to use the the Linux device model
+ * @cdev: character device object to create character device
+ * @ubi_num: UBI device number
+ * @ubi_name: UBI device name
+ * @vol_count: number of volumes in this UBI device
+ * @volumes: volumes of this UBI device
+ * @volumes_lock: protects @volumes, @rsvd_pebs, @avail_pebs, beb_rsvd_pebs,
+ * @beb_rsvd_level, @bad_peb_count, @good_peb_count, @vol_count,
+ * @vol->readers, @vol->writers, @vol->exclusive,
+ * @vol->ref_count, @vol->mapping and @vol->eba_tbl.
+ * @ref_count: count of references on the UBI device
+ *
+ * @rsvd_pebs: count of reserved physical eraseblocks
+ * @avail_pebs: count of available physical eraseblocks
+ * @beb_rsvd_pebs: how many physical eraseblocks are reserved for bad PEB
+ * handling
+ * @beb_rsvd_level: normal level of PEBs reserved for bad PEB handling
+ *
+ * @autoresize_vol_id: ID of the volume which has to be auto-resized at the end
+ * of UBI ititializetion
+ * @vtbl_slots: how many slots are available in the volume table
+ * @vtbl_size: size of the volume table in bytes
+ * @vtbl: in-RAM volume table copy
+ * @volumes_mutex: protects on-flash volume table and serializes volume
+ * changes, like creation, deletion, update, resize
+ *
+ * @max_ec: current highest erase counter value
+ * @mean_ec: current mean erase counter value
+ *
+ * @global_sqnum: global sequence number
+ * @ltree_lock: protects the lock tree and @global_sqnum
+ * @ltree: the lock tree
+ * @alc_mutex: serializes "atomic LEB change" operations
+ *
+ * @used: RB-tree of used physical eraseblocks
+ * @free: RB-tree of free physical eraseblocks
+ * @scrub: RB-tree of physical eraseblocks which need scrubbing
+ * @prot: protection trees
+ * @prot.pnum: protection tree indexed by physical eraseblock numbers
+ * @prot.aec: protection tree indexed by absolute erase counter value
+ * @wl_lock: protects the @used, @free, @prot, @lookuptbl, @abs_ec, @move_from,
+ * @move_to, @move_to_put @erase_pending, @wl_scheduled, and @works
+ * fields
+ * @move_mutex: serializes eraseblock moves
+ * @wl_scheduled: non-zero if the wear-leveling was scheduled
+ * @lookuptbl: a table to quickly find a &struct ubi_wl_entry object for any
+ * physical eraseblock
+ * @abs_ec: absolute erase counter
+ * @move_from: physical eraseblock from where the data is being moved
+ * @move_to: physical eraseblock where the data is being moved to
+ * @move_to_put: if the "to" PEB was put
+ * @works: list of pending works
+ * @works_count: count of pending works
+ * @bgt_thread: background thread description object
+ * @thread_enabled: if the background thread is enabled
+ * @bgt_name: background thread name
+ *
+ * @flash_size: underlying MTD device size (in bytes)
+ * @peb_count: count of physical eraseblocks on the MTD device
+ * @peb_size: physical eraseblock size
+ * @bad_peb_count: count of bad physical eraseblocks
+ * @good_peb_count: count of good physical eraseblocks
+ * @min_io_size: minimal input/output unit size of the underlying MTD device
+ * @hdrs_min_io_size: minimal I/O unit size used for VID and EC headers
+ * @ro_mode: if the UBI device is in read-only mode
+ * @leb_size: logical eraseblock size
+ * @leb_start: starting offset of logical eraseblocks within physical
+ * eraseblocks
+ * @ec_hdr_alsize: size of the EC header aligned to @hdrs_min_io_size
+ * @vid_hdr_alsize: size of the VID header aligned to @hdrs_min_io_size
+ * @vid_hdr_offset: starting offset of the volume identifier header (might be
+ * unaligned)
+ * @vid_hdr_aloffset: starting offset of the VID header aligned to
+ * @hdrs_min_io_size
+ * @vid_hdr_shift: contains @vid_hdr_offset - @vid_hdr_aloffset
+ * @bad_allowed: whether the MTD device admits of bad physical eraseblocks or
+ * not
+ * @mtd: MTD device descriptor
+ *
+ * @peb_buf1: a buffer of PEB size used for different purposes
+ * @peb_buf2: another buffer of PEB size used for different purposes
+ * @buf_mutex: proptects @peb_buf1 and @peb_buf2
+ * @dbg_peb_buf: buffer of PEB size used for debugging
+ * @dbg_buf_mutex: proptects @dbg_peb_buf
+ */
+struct ubi_device {
+ struct cdev cdev;
+ struct device dev;
+ int ubi_num;
+ char ubi_name[sizeof(UBI_NAME_STR)+5];
+ int vol_count;
+ struct ubi_volume *volumes[UBI_MAX_VOLUMES+UBI_INT_VOL_COUNT];
+ spinlock_t volumes_lock;
+ int ref_count;
+
+ int rsvd_pebs;
+ int avail_pebs;
+ int beb_rsvd_pebs;
+ int beb_rsvd_level;
+
+ int autoresize_vol_id;
+ int vtbl_slots;
+ int vtbl_size;
+ struct ubi_vtbl_record *vtbl;
+ struct mutex volumes_mutex;
+
+ int max_ec;
+ /* TODO: mean_ec is not updated run-time, fix */
+ int mean_ec;
+
+ /* EBA unit's stuff */
+ unsigned long long global_sqnum;
+ spinlock_t ltree_lock;
+ struct rb_root ltree;
+ struct mutex alc_mutex;
+
+ /* Wear-leveling unit's stuff */
+ struct rb_root used;
+ struct rb_root free;
+ struct rb_root scrub;
+ struct {
+ struct rb_root pnum;
+ struct rb_root aec;
+ } prot;
+ spinlock_t wl_lock;
+ struct mutex move_mutex;
+ struct rw_semaphore work_sem;
+ int wl_scheduled;
+ struct ubi_wl_entry **lookuptbl;
+ unsigned long long abs_ec;
+ struct ubi_wl_entry *move_from;
+ struct ubi_wl_entry *move_to;
+ int move_to_put;
+ struct list_head works;
+ int works_count;
+ struct task_struct *bgt_thread;
+ int thread_enabled;
+ char bgt_name[sizeof(UBI_BGT_NAME_PATTERN)+2];
+
+ /* I/O unit's stuff */
+ long long flash_size;
+ int peb_count;
+ int peb_size;
+ int bad_peb_count;
+ int good_peb_count;
+ int min_io_size;
+ int hdrs_min_io_size;
+ int ro_mode;
+ int leb_size;
+ int leb_start;
+ int ec_hdr_alsize;
+ int vid_hdr_alsize;
+ int vid_hdr_offset;
+ int vid_hdr_aloffset;
+ int vid_hdr_shift;
+ int bad_allowed;
+ struct mtd_info *mtd;
+
+ void *peb_buf1;
+ void *peb_buf2;
+ struct mutex buf_mutex;
+ struct mutex ckvol_mutex;
+#ifdef CONFIG_MTD_UBI_DEBUG
+ void *dbg_peb_buf;
+ struct mutex dbg_buf_mutex;
+#endif
+};
+
+extern struct kmem_cache *ubi_wl_entry_slab;
+extern struct file_operations ubi_ctrl_cdev_operations;
+extern struct file_operations ubi_cdev_operations;
+extern struct file_operations ubi_vol_cdev_operations;
+extern struct class *ubi_class;
+extern struct mutex ubi_devices_mutex;
+
+/* vtbl.c */
+int ubi_change_vtbl_record(struct ubi_device *ubi, int idx,
+ struct ubi_vtbl_record *vtbl_rec);
+int ubi_read_volume_table(struct ubi_device *ubi, struct ubi_scan_info *si);
+
+/* vmt.c */
+int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req);
+int ubi_remove_volume(struct ubi_volume_desc *desc);
+int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs);
+int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol);
+void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol);
+
+/* upd.c */
+int ubi_start_update(struct ubi_device *ubi, struct ubi_volume *vol,
+ long long bytes);
+int ubi_more_update_data(struct ubi_device *ubi, struct ubi_volume *vol,
+ const void __user *buf, int count);
+int ubi_start_leb_change(struct ubi_device *ubi, struct ubi_volume *vol,
+ const struct ubi_leb_change_req *req);
+int ubi_more_leb_change_data(struct ubi_device *ubi, struct ubi_volume *vol,
+ const void __user *buf, int count);
+
+/* misc.c */
+int ubi_calc_data_len(const struct ubi_device *ubi, const void *buf, int length);
+int ubi_check_volume(struct ubi_device *ubi, int vol_id);
+void ubi_calculate_reserved(struct ubi_device *ubi);
+
+/* gluebi.c */
+#ifdef CONFIG_MTD_UBI_GLUEBI
+int ubi_create_gluebi(struct ubi_device *ubi, struct ubi_volume *vol);
+int ubi_destroy_gluebi(struct ubi_volume *vol);
+void ubi_gluebi_updated(struct ubi_volume *vol);
+#else
+#define ubi_create_gluebi(ubi, vol) 0
+#define ubi_destroy_gluebi(vol) 0
+#define ubi_gluebi_updated(vol)
+#endif
+
+/* eba.c */
+int ubi_eba_unmap_leb(struct ubi_device *ubi, struct ubi_volume *vol,
+ int lnum);
+int ubi_eba_read_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum,
+ void *buf, int offset, int len, int check);
+int ubi_eba_write_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum,
+ const void *buf, int offset, int len, int dtype);
+int ubi_eba_write_leb_st(struct ubi_device *ubi, struct ubi_volume *vol,
+ int lnum, const void *buf, int len, int dtype,
+ int used_ebs);
+int ubi_eba_atomic_leb_change(struct ubi_device *ubi, struct ubi_volume *vol,
+ int lnum, const void *buf, int len, int dtype);
+int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
+ struct ubi_vid_hdr *vid_hdr);
+int ubi_eba_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si);
+void ubi_eba_close(const struct ubi_device *ubi);
+
+/* wl.c */
+int ubi_wl_get_peb(struct ubi_device *ubi, int dtype);
+int ubi_wl_put_peb(struct ubi_device *ubi, int pnum, int torture);
+int ubi_wl_flush(struct ubi_device *ubi);
+int ubi_wl_scrub_peb(struct ubi_device *ubi, int pnum);
+int ubi_wl_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si);
+void ubi_wl_close(struct ubi_device *ubi);
+int ubi_thread(void *u);
+
+/* io.c */
+int ubi_io_read(const struct ubi_device *ubi, void *buf, int pnum, int offset,
+ int len);
+int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
+ int len);
+int ubi_io_sync_erase(struct ubi_device *ubi, int pnum, int torture);
+int ubi_io_is_bad(const struct ubi_device *ubi, int pnum);
+int ubi_io_mark_bad(const struct ubi_device *ubi, int pnum);
+int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
+ struct ubi_ec_hdr *ec_hdr, int verbose);
+int ubi_io_write_ec_hdr(struct ubi_device *ubi, int pnum,
+ struct ubi_ec_hdr *ec_hdr);
+int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
+ struct ubi_vid_hdr *vid_hdr, int verbose);
+int ubi_io_write_vid_hdr(struct ubi_device *ubi, int pnum,
+ struct ubi_vid_hdr *vid_hdr);
+
+/* build.c */
+int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset);
+int ubi_detach_mtd_dev(int ubi_num, int anyway);
+struct ubi_device *ubi_get_device(int ubi_num);
+void ubi_put_device(struct ubi_device *ubi);
+struct ubi_device *ubi_get_by_major(int major);
+int ubi_major2num(int major);
+
+/*
+ * ubi_rb_for_each_entry - walk an RB-tree.
+ * @rb: a pointer to type 'struct rb_node' to to use as a loop counter
+ * @pos: a pointer to RB-tree entry type to use as a loop counter
+ * @root: RB-tree's root
+ * @member: the name of the 'struct rb_node' within the RB-tree entry
+ */
+#define ubi_rb_for_each_entry(rb, pos, root, member) \
+ for (rb = rb_first(root), \
+ pos = (rb ? container_of(rb, typeof(*pos), member) : NULL); \
+ rb; \
+ rb = rb_next(rb), pos = container_of(rb, typeof(*pos), member))
+
+/**
+ * ubi_zalloc_vid_hdr - allocate a volume identifier header object.
+ * @ubi: UBI device description object
+ * @gfp_flags: GFP flags to allocate with
+ *
+ * This function returns a pointer to the newly allocated and zero-filled
+ * volume identifier header object in case of success and %NULL in case of
+ * failure.
+ */
+static inline struct ubi_vid_hdr *
+ubi_zalloc_vid_hdr(const struct ubi_device *ubi, unsigned int gfp_flags)
+{
+ void *vid_hdr;
+
+ vid_hdr = kzalloc(ubi->vid_hdr_alsize, gfp_flags);
+ if (!vid_hdr)
+ return NULL;
+
+ /*
+ * VID headers may be stored at un-aligned flash offsets, so we shift
+ * the pointer.
+ */
+ return vid_hdr + ubi->vid_hdr_shift;
+}
+
+/**
+ * ubi_free_vid_hdr - free a volume identifier header object.
+ * @ubi: UBI device description object
+ * @vid_hdr: the object to free
+ */
+static inline void ubi_free_vid_hdr(const struct ubi_device *ubi,
+ struct ubi_vid_hdr *vid_hdr)
+{
+ void *p = vid_hdr;
+
+ if (!p)
+ return;
+
+ kfree(p - ubi->vid_hdr_shift);
+}
+
+/*
+ * This function is equivalent to 'ubi_io_read()', but @offset is relative to
+ * the beginning of the logical eraseblock, not to the beginning of the
+ * physical eraseblock.
+ */
+static inline int ubi_io_read_data(const struct ubi_device *ubi, void *buf,
+ int pnum, int offset, int len)
+{
+ ubi_assert(offset >= 0);
+ return ubi_io_read(ubi, buf, pnum, offset + ubi->leb_start, len);
+}
+
+/*
+ * This function is equivalent to 'ubi_io_write()', but @offset is relative to
+ * the beginning of the logical eraseblock, not to the beginning of the
+ * physical eraseblock.
+ */
+static inline int ubi_io_write_data(struct ubi_device *ubi, const void *buf,
+ int pnum, int offset, int len)
+{
+ ubi_assert(offset >= 0);
+ return ubi_io_write(ubi, buf, pnum, offset + ubi->leb_start, len);
+}
+
+/**
+ * ubi_ro_mode - switch to read-only mode.
+ * @ubi: UBI device description object
+ */
+static inline void ubi_ro_mode(struct ubi_device *ubi)
+{
+ if (!ubi->ro_mode) {
+ ubi->ro_mode = 1;
+ ubi_warn("switch to read-only mode");
+ }
+}
+
+/**
+ * vol_id2idx - get table index by volume ID.
+ * @ubi: UBI device description object
+ * @vol_id: volume ID
+ */
+static inline int vol_id2idx(const struct ubi_device *ubi, int vol_id)
+{
+ if (vol_id >= UBI_INTERNAL_VOL_START)
+ return vol_id - UBI_INTERNAL_VOL_START + ubi->vtbl_slots;
+ else
+ return vol_id;
+}
+
+/**
+ * idx2vol_id - get volume ID by table index.
+ * @ubi: UBI device description object
+ * @idx: table index
+ */
+static inline int idx2vol_id(const struct ubi_device *ubi, int idx)
+{
+ if (idx >= ubi->vtbl_slots)
+ return idx - ubi->vtbl_slots + UBI_INTERNAL_VOL_START;
+ else
+ return idx;
+}
+
+#endif /* !__UBI_UBI_H__ */
diff --git a/drivers/mtd/ubi/upd.c b/drivers/mtd/ubi/upd.c
new file mode 100644
index 0000000..8267b1a
--- /dev/null
+++ b/drivers/mtd/ubi/upd.c
@@ -0,0 +1,441 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ * Copyright (c) Nokia Corporation, 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ *
+ * Jan 2007: Alexander Schmidt, hacked per-volume update.
+ */
+
+/*
+ * This file contains implementation of the volume update and atomic LEB change
+ * functionality.
+ *
+ * The update operation is based on the per-volume update marker which is
+ * stored in the volume table. The update marker is set before the update
+ * starts, and removed after the update has been finished. So if the update was
+ * interrupted by an unclean re-boot or due to some other reasons, the update
+ * marker stays on the flash media and UBI finds it when it attaches the MTD
+ * device next time. If the update marker is set for a volume, the volume is
+ * treated as damaged and most I/O operations are prohibited. Only a new update
+ * operation is allowed.
+ *
+ * Note, in general it is possible to implement the update operation as a
+ * transaction with a roll-back capability.
+ */
+
+#ifdef UBI_LINUX
+#include <linux/err.h>
+#include <asm/uaccess.h>
+#include <asm/div64.h>
+#endif
+
+#include "ubi-barebox.h"
+#include "ubi.h"
+
+/**
+ * set_update_marker - set update marker.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ *
+ * This function sets the update marker flag for volume @vol. Returns zero
+ * in case of success and a negative error code in case of failure.
+ */
+static int set_update_marker(struct ubi_device *ubi, struct ubi_volume *vol)
+{
+ int err;
+ struct ubi_vtbl_record vtbl_rec;
+
+ dbg_msg("set update marker for volume %d", vol->vol_id);
+
+ if (vol->upd_marker) {
+ ubi_assert(ubi->vtbl[vol->vol_id].upd_marker);
+ dbg_msg("already set");
+ return 0;
+ }
+
+ memcpy(&vtbl_rec, &ubi->vtbl[vol->vol_id],
+ sizeof(struct ubi_vtbl_record));
+ vtbl_rec.upd_marker = 1;
+
+ mutex_lock(&ubi->volumes_mutex);
+ err = ubi_change_vtbl_record(ubi, vol->vol_id, &vtbl_rec);
+ mutex_unlock(&ubi->volumes_mutex);
+ vol->upd_marker = 1;
+ return err;
+}
+
+/**
+ * clear_update_marker - clear update marker.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ * @bytes: new data size in bytes
+ *
+ * This function clears the update marker for volume @vol, sets new volume
+ * data size and clears the "corrupted" flag (static volumes only). Returns
+ * zero in case of success and a negative error code in case of failure.
+ */
+static int clear_update_marker(struct ubi_device *ubi, struct ubi_volume *vol,
+ long long bytes)
+{
+ int err;
+ uint64_t tmp;
+ struct ubi_vtbl_record vtbl_rec;
+
+ dbg_msg("clear update marker for volume %d", vol->vol_id);
+
+ memcpy(&vtbl_rec, &ubi->vtbl[vol->vol_id],
+ sizeof(struct ubi_vtbl_record));
+ ubi_assert(vol->upd_marker && vtbl_rec.upd_marker);
+ vtbl_rec.upd_marker = 0;
+
+ if (vol->vol_type == UBI_STATIC_VOLUME) {
+ vol->corrupted = 0;
+ vol->used_bytes = tmp = bytes;
+ vol->last_eb_bytes = do_div(tmp, vol->usable_leb_size);
+ vol->used_ebs = tmp;
+ if (vol->last_eb_bytes)
+ vol->used_ebs += 1;
+ else
+ vol->last_eb_bytes = vol->usable_leb_size;
+ }
+
+ mutex_lock(&ubi->volumes_mutex);
+ err = ubi_change_vtbl_record(ubi, vol->vol_id, &vtbl_rec);
+ mutex_unlock(&ubi->volumes_mutex);
+ vol->upd_marker = 0;
+ return err;
+}
+
+/**
+ * ubi_start_update - start volume update.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ * @bytes: update bytes
+ *
+ * This function starts volume update operation. If @bytes is zero, the volume
+ * is just wiped out. Returns zero in case of success and a negative error code
+ * in case of failure.
+ */
+int ubi_start_update(struct ubi_device *ubi, struct ubi_volume *vol,
+ long long bytes)
+{
+ int i, err;
+ uint64_t tmp;
+
+ dbg_msg("start update of volume %d, %llu bytes", vol->vol_id, bytes);
+ ubi_assert(!vol->updating && !vol->changing_leb);
+ vol->updating = 1;
+
+ err = set_update_marker(ubi, vol);
+ if (err)
+ return err;
+
+ /* Before updating - wipe out the volume */
+ for (i = 0; i < vol->reserved_pebs; i++) {
+ err = ubi_eba_unmap_leb(ubi, vol, i);
+ if (err)
+ return err;
+ }
+
+ if (bytes == 0) {
+ err = clear_update_marker(ubi, vol, 0);
+ if (err)
+ return err;
+ err = ubi_wl_flush(ubi);
+ if (!err)
+ vol->updating = 0;
+ }
+
+ vol->upd_buf = vmalloc(ubi->leb_size);
+ if (!vol->upd_buf)
+ return -ENOMEM;
+
+ tmp = bytes;
+ vol->upd_ebs = !!do_div(tmp, vol->usable_leb_size);
+ vol->upd_ebs += tmp;
+ vol->upd_bytes = bytes;
+ vol->upd_received = 0;
+ return 0;
+}
+
+/**
+ * ubi_start_leb_change - start atomic LEB change.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ * @req: operation request
+ *
+ * This function starts atomic LEB change operation. Returns zero in case of
+ * success and a negative error code in case of failure.
+ */
+int ubi_start_leb_change(struct ubi_device *ubi, struct ubi_volume *vol,
+ const struct ubi_leb_change_req *req)
+{
+ ubi_assert(!vol->updating && !vol->changing_leb);
+
+ dbg_msg("start changing LEB %d:%d, %u bytes",
+ vol->vol_id, req->lnum, req->bytes);
+ if (req->bytes == 0)
+ return ubi_eba_atomic_leb_change(ubi, vol, req->lnum, NULL, 0,
+ req->dtype);
+
+ vol->upd_bytes = req->bytes;
+ vol->upd_received = 0;
+ vol->changing_leb = 1;
+ vol->ch_lnum = req->lnum;
+ vol->ch_dtype = req->dtype;
+
+ vol->upd_buf = vmalloc(req->bytes);
+ if (!vol->upd_buf)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/**
+ * write_leb - write update data.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ * @lnum: logical eraseblock number
+ * @buf: data to write
+ * @len: data size
+ * @used_ebs: how many logical eraseblocks will this volume contain (static
+ * volumes only)
+ *
+ * This function writes update data to corresponding logical eraseblock. In
+ * case of dynamic volume, this function checks if the data contains 0xFF bytes
+ * at the end. If yes, the 0xFF bytes are cut and not written. So if the whole
+ * buffer contains only 0xFF bytes, the LEB is left unmapped.
+ *
+ * The reason why we skip the trailing 0xFF bytes in case of dynamic volume is
+ * that we want to make sure that more data may be appended to the logical
+ * eraseblock in future. Indeed, writing 0xFF bytes may have side effects and
+ * this PEB won't be writable anymore. So if one writes the file-system image
+ * to the UBI volume where 0xFFs mean free space - UBI makes sure this free
+ * space is writable after the update.
+ *
+ * We do not do this for static volumes because they are read-only. But this
+ * also cannot be done because we have to store per-LEB CRC and the correct
+ * data length.
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int write_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum,
+ void *buf, int len, int used_ebs)
+{
+ int err;
+
+ if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
+ int l = ALIGN(len, ubi->min_io_size);
+
+ memset(buf + len, 0xFF, l - len);
+ len = ubi_calc_data_len(ubi, buf, l);
+ if (len == 0) {
+ dbg_msg("all %d bytes contain 0xFF - skip", len);
+ return 0;
+ }
+
+ err = ubi_eba_write_leb(ubi, vol, lnum, buf, 0, len, UBI_UNKNOWN);
+ } else {
+ /*
+ * When writing static volume, and this is the last logical
+ * eraseblock, the length (@len) does not have to be aligned to
+ * the minimal flash I/O unit. The 'ubi_eba_write_leb_st()'
+ * function accepts exact (unaligned) length and stores it in
+ * the VID header. And it takes care of proper alignment by
+ * padding the buffer. Here we just make sure the padding will
+ * contain zeros, not random trash.
+ */
+ memset(buf + len, 0, vol->usable_leb_size - len);
+ err = ubi_eba_write_leb_st(ubi, vol, lnum, buf, len,
+ UBI_UNKNOWN, used_ebs);
+ }
+
+ return err;
+}
+
+/**
+ * ubi_more_update_data - write more update data.
+ * @vol: volume description object
+ * @buf: write data (user-space memory buffer)
+ * @count: how much bytes to write
+ *
+ * This function writes more data to the volume which is being updated. It may
+ * be called arbitrary number of times until all the update data arriveis. This
+ * function returns %0 in case of success, number of bytes written during the
+ * last call if the whole volume update has been successfully finished, and a
+ * negative error code in case of failure.
+ */
+int ubi_more_update_data(struct ubi_device *ubi, struct ubi_volume *vol,
+ const void __user *buf, int count)
+{
+ uint64_t tmp;
+ int lnum, offs, err = 0, len, to_write = count;
+
+ dbg_msg("write %d of %lld bytes, %lld already passed",
+ count, vol->upd_bytes, vol->upd_received);
+
+ if (ubi->ro_mode)
+ return -EROFS;
+
+ tmp = vol->upd_received;
+ offs = do_div(tmp, vol->usable_leb_size);
+ lnum = tmp;
+
+ if (vol->upd_received + count > vol->upd_bytes)
+ to_write = count = vol->upd_bytes - vol->upd_received;
+
+ /*
+ * When updating volumes, we accumulate whole logical eraseblock of
+ * data and write it at once.
+ */
+ if (offs != 0) {
+ /*
+ * This is a write to the middle of the logical eraseblock. We
+ * copy the data to our update buffer and wait for more data or
+ * flush it if the whole eraseblock is written or the update
+ * is finished.
+ */
+
+ len = vol->usable_leb_size - offs;
+ if (len > count)
+ len = count;
+
+ err = copy_from_user(vol->upd_buf + offs, buf, len);
+ if (err)
+ return -EFAULT;
+
+ if (offs + len == vol->usable_leb_size ||
+ vol->upd_received + len == vol->upd_bytes) {
+ int flush_len = offs + len;
+
+ /*
+ * OK, we gathered either the whole eraseblock or this
+ * is the last chunk, it's time to flush the buffer.
+ */
+ ubi_assert(flush_len <= vol->usable_leb_size);
+ err = write_leb(ubi, vol, lnum, vol->upd_buf, flush_len,
+ vol->upd_ebs);
+ if (err)
+ return err;
+ }
+
+ vol->upd_received += len;
+ count -= len;
+ buf += len;
+ lnum += 1;
+ }
+
+ /*
+ * If we've got more to write, let's continue. At this point we know we
+ * are starting from the beginning of an eraseblock.
+ */
+ while (count) {
+ if (count > vol->usable_leb_size)
+ len = vol->usable_leb_size;
+ else
+ len = count;
+
+ err = copy_from_user(vol->upd_buf, buf, len);
+ if (err)
+ return -EFAULT;
+
+ if (len == vol->usable_leb_size ||
+ vol->upd_received + len == vol->upd_bytes) {
+ err = write_leb(ubi, vol, lnum, vol->upd_buf,
+ len, vol->upd_ebs);
+ if (err)
+ break;
+ }
+
+ vol->upd_received += len;
+ count -= len;
+ lnum += 1;
+ buf += len;
+ }
+
+ ubi_assert(vol->upd_received <= vol->upd_bytes);
+ if (vol->upd_received == vol->upd_bytes) {
+ /* The update is finished, clear the update marker */
+ err = clear_update_marker(ubi, vol, vol->upd_bytes);
+ if (err)
+ return err;
+ err = ubi_wl_flush(ubi);
+ if (err == 0) {
+ vol->updating = 0;
+ err = to_write;
+ vfree(vol->upd_buf);
+ }
+ }
+
+ return err;
+}
+
+/**
+ * ubi_more_leb_change_data - accept more data for atomic LEB change.
+ * @vol: volume description object
+ * @buf: write data (user-space memory buffer)
+ * @count: how much bytes to write
+ *
+ * This function accepts more data to the volume which is being under the
+ * "atomic LEB change" operation. It may be called arbitrary number of times
+ * until all data arrives. This function returns %0 in case of success, number
+ * of bytes written during the last call if the whole "atomic LEB change"
+ * operation has been successfully finished, and a negative error code in case
+ * of failure.
+ */
+int ubi_more_leb_change_data(struct ubi_device *ubi, struct ubi_volume *vol,
+ const void __user *buf, int count)
+{
+ int err;
+
+ dbg_msg("write %d of %lld bytes, %lld already passed",
+ count, vol->upd_bytes, vol->upd_received);
+
+ if (ubi->ro_mode)
+ return -EROFS;
+
+ if (vol->upd_received + count > vol->upd_bytes)
+ count = vol->upd_bytes - vol->upd_received;
+
+ err = copy_from_user(vol->upd_buf + vol->upd_received, buf, count);
+ if (err)
+ return -EFAULT;
+
+ vol->upd_received += count;
+
+ if (vol->upd_received == vol->upd_bytes) {
+ int len = ALIGN((int)vol->upd_bytes, ubi->min_io_size);
+
+ memset(vol->upd_buf + vol->upd_bytes, 0xFF, len - vol->upd_bytes);
+ len = ubi_calc_data_len(ubi, vol->upd_buf, len);
+ err = ubi_eba_atomic_leb_change(ubi, vol, vol->ch_lnum,
+ vol->upd_buf, len, UBI_UNKNOWN);
+ if (err)
+ return err;
+ }
+
+ ubi_assert(vol->upd_received <= vol->upd_bytes);
+ if (vol->upd_received == vol->upd_bytes) {
+ vol->changing_leb = 0;
+ err = count;
+ vfree(vol->upd_buf);
+ }
+
+ return err;
+}
diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
new file mode 100644
index 0000000..935dcdc
--- /dev/null
+++ b/drivers/mtd/ubi/vmt.c
@@ -0,0 +1,866 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+/*
+ * This file contains implementation of volume creation, deletion, updating and
+ * resizing.
+ */
+
+#ifdef UBI_LINUX
+#include <linux/err.h>
+#include <asm/div64.h>
+#endif
+
+#include "ubi-barebox.h"
+#include "ubi.h"
+
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
+static void paranoid_check_volumes(struct ubi_device *ubi);
+#else
+#define paranoid_check_volumes(ubi)
+#endif
+
+#ifdef UBI_LINUX
+static ssize_t vol_attribute_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+/* Device attributes corresponding to files in '/<sysfs>/class/ubi/ubiX_Y' */
+static struct device_attribute attr_vol_reserved_ebs =
+ __ATTR(reserved_ebs, S_IRUGO, vol_attribute_show, NULL);
+static struct device_attribute attr_vol_type =
+ __ATTR(type, S_IRUGO, vol_attribute_show, NULL);
+static struct device_attribute attr_vol_name =
+ __ATTR(name, S_IRUGO, vol_attribute_show, NULL);
+static struct device_attribute attr_vol_corrupted =
+ __ATTR(corrupted, S_IRUGO, vol_attribute_show, NULL);
+static struct device_attribute attr_vol_alignment =
+ __ATTR(alignment, S_IRUGO, vol_attribute_show, NULL);
+static struct device_attribute attr_vol_usable_eb_size =
+ __ATTR(usable_eb_size, S_IRUGO, vol_attribute_show, NULL);
+static struct device_attribute attr_vol_data_bytes =
+ __ATTR(data_bytes, S_IRUGO, vol_attribute_show, NULL);
+static struct device_attribute attr_vol_upd_marker =
+ __ATTR(upd_marker, S_IRUGO, vol_attribute_show, NULL);
+
+/*
+ * "Show" method for files in '/<sysfs>/class/ubi/ubiX_Y/'.
+ *
+ * Consider a situation:
+ * A. process 1 opens a sysfs file related to volume Y, say
+ * /<sysfs>/class/ubi/ubiX_Y/reserved_ebs;
+ * B. process 2 removes volume Y;
+ * C. process 1 starts reading the /<sysfs>/class/ubi/ubiX_Y/reserved_ebs file;
+ *
+ * In this situation, this function will return %-ENODEV because it will find
+ * out that the volume was removed from the @ubi->volumes array.
+ */
+static ssize_t vol_attribute_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int ret;
+ struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
+ struct ubi_device *ubi;
+
+ ubi = ubi_get_device(vol->ubi->ubi_num);
+ if (!ubi)
+ return -ENODEV;
+
+ spin_lock(&ubi->volumes_lock);
+ if (!ubi->volumes[vol->vol_id]) {
+ spin_unlock(&ubi->volumes_lock);
+ ubi_put_device(ubi);
+ return -ENODEV;
+ }
+ /* Take a reference to prevent volume removal */
+ vol->ref_count += 1;
+ spin_unlock(&ubi->volumes_lock);
+
+ if (attr == &attr_vol_reserved_ebs)
+ ret = sprintf(buf, "%d\n", vol->reserved_pebs);
+ else if (attr == &attr_vol_type) {
+ const char *tp;
+
+ if (vol->vol_type == UBI_DYNAMIC_VOLUME)
+ tp = "dynamic";
+ else
+ tp = "static";
+ ret = sprintf(buf, "%s\n", tp);
+ } else if (attr == &attr_vol_name)
+ ret = sprintf(buf, "%s\n", vol->name);
+ else if (attr == &attr_vol_corrupted)
+ ret = sprintf(buf, "%d\n", vol->corrupted);
+ else if (attr == &attr_vol_alignment)
+ ret = sprintf(buf, "%d\n", vol->alignment);
+ else if (attr == &attr_vol_usable_eb_size)
+ ret = sprintf(buf, "%d\n", vol->usable_leb_size);
+ else if (attr == &attr_vol_data_bytes)
+ ret = sprintf(buf, "%lld\n", vol->used_bytes);
+ else if (attr == &attr_vol_upd_marker)
+ ret = sprintf(buf, "%d\n", vol->upd_marker);
+ else
+ /* This must be a bug */
+ ret = -EINVAL;
+
+ /* We've done the operation, drop volume and UBI device references */
+ spin_lock(&ubi->volumes_lock);
+ vol->ref_count -= 1;
+ ubi_assert(vol->ref_count >= 0);
+ spin_unlock(&ubi->volumes_lock);
+ ubi_put_device(ubi);
+ return ret;
+}
+#endif
+
+/* Release method for volume devices */
+static void vol_release(struct device *dev)
+{
+ struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
+
+ kfree(vol);
+}
+
+#ifdef UBI_LINUX
+/**
+ * volume_sysfs_init - initialize sysfs for new volume.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ *
+ * Note, this function does not free allocated resources in case of failure -
+ * the caller does it. This is because this would cause release() here and the
+ * caller would oops.
+ */
+static int volume_sysfs_init(struct ubi_device *ubi, struct ubi_volume *vol)
+{
+ int err;
+
+ err = device_create_file(&vol->dev, &attr_vol_reserved_ebs);
+ if (err)
+ return err;
+ err = device_create_file(&vol->dev, &attr_vol_type);
+ if (err)
+ return err;
+ err = device_create_file(&vol->dev, &attr_vol_name);
+ if (err)
+ return err;
+ err = device_create_file(&vol->dev, &attr_vol_corrupted);
+ if (err)
+ return err;
+ err = device_create_file(&vol->dev, &attr_vol_alignment);
+ if (err)
+ return err;
+ err = device_create_file(&vol->dev, &attr_vol_usable_eb_size);
+ if (err)
+ return err;
+ err = device_create_file(&vol->dev, &attr_vol_data_bytes);
+ if (err)
+ return err;
+ err = device_create_file(&vol->dev, &attr_vol_upd_marker);
+ return err;
+}
+
+/**
+ * volume_sysfs_close - close sysfs for a volume.
+ * @vol: volume description object
+ */
+static void volume_sysfs_close(struct ubi_volume *vol)
+{
+ device_remove_file(&vol->dev, &attr_vol_upd_marker);
+ device_remove_file(&vol->dev, &attr_vol_data_bytes);
+ device_remove_file(&vol->dev, &attr_vol_usable_eb_size);
+ device_remove_file(&vol->dev, &attr_vol_alignment);
+ device_remove_file(&vol->dev, &attr_vol_corrupted);
+ device_remove_file(&vol->dev, &attr_vol_name);
+ device_remove_file(&vol->dev, &attr_vol_type);
+ device_remove_file(&vol->dev, &attr_vol_reserved_ebs);
+ device_unregister(&vol->dev);
+}
+#endif
+
+/**
+ * ubi_create_volume - create volume.
+ * @ubi: UBI device description object
+ * @req: volume creation request
+ *
+ * This function creates volume described by @req. If @req->vol_id id
+ * %UBI_VOL_NUM_AUTO, this function automatically assign ID to the new volume
+ * and saves it in @req->vol_id. Returns zero in case of success and a negative
+ * error code in case of failure. Note, the caller has to have the
+ * @ubi->volumes_mutex locked.
+ */
+int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
+{
+ int i, err, vol_id = req->vol_id, dont_free = 0;
+ struct ubi_volume *vol;
+ struct ubi_vtbl_record vtbl_rec;
+ uint64_t bytes;
+ dev_t dev;
+
+ if (ubi->ro_mode)
+ return -EROFS;
+
+ vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
+ if (!vol)
+ return -ENOMEM;
+
+ spin_lock(&ubi->volumes_lock);
+ if (vol_id == UBI_VOL_NUM_AUTO) {
+ /* Find unused volume ID */
+ dbg_msg("search for vacant volume ID");
+ for (i = 0; i < ubi->vtbl_slots; i++)
+ if (!ubi->volumes[i]) {
+ vol_id = i;
+ break;
+ }
+
+ if (vol_id == UBI_VOL_NUM_AUTO) {
+ dbg_err("out of volume IDs");
+ err = -ENFILE;
+ goto out_unlock;
+ }
+ req->vol_id = vol_id;
+ }
+
+ dbg_msg("volume ID %d, %llu bytes, type %d, name %s",
+ vol_id, (unsigned long long)req->bytes,
+ (int)req->vol_type, req->name);
+
+ /* Ensure that this volume does not exist */
+ err = -EEXIST;
+ if (ubi->volumes[vol_id]) {
+ dbg_err("volume %d already exists", vol_id);
+ goto out_unlock;
+ }
+
+ /* Ensure that the name is unique */
+ for (i = 0; i < ubi->vtbl_slots; i++)
+ if (ubi->volumes[i] &&
+ ubi->volumes[i]->name_len == req->name_len &&
+ !strcmp(ubi->volumes[i]->name, req->name)) {
+ dbg_err("volume \"%s\" exists (ID %d)", req->name, i);
+ goto out_unlock;
+ }
+
+ /* Calculate how many eraseblocks are requested */
+ vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
+ bytes = req->bytes;
+ if (do_div(bytes, vol->usable_leb_size))
+ vol->reserved_pebs = 1;
+ vol->reserved_pebs += bytes;
+
+ /* Reserve physical eraseblocks */
+ if (vol->reserved_pebs > ubi->avail_pebs) {
+ dbg_err("not enough PEBs, only %d available", ubi->avail_pebs);
+ err = -ENOSPC;
+ goto out_unlock;
+ }
+ ubi->avail_pebs -= vol->reserved_pebs;
+ ubi->rsvd_pebs += vol->reserved_pebs;
+ spin_unlock(&ubi->volumes_lock);
+
+ vol->vol_id = vol_id;
+ vol->alignment = req->alignment;
+ vol->data_pad = ubi->leb_size % vol->alignment;
+ vol->vol_type = req->vol_type;
+ vol->name_len = req->name_len;
+ memcpy(vol->name, req->name, vol->name_len + 1);
+ vol->ubi = ubi;
+
+ /*
+ * Finish all pending erases because there may be some LEBs belonging
+ * to the same volume ID.
+ */
+ err = ubi_wl_flush(ubi);
+ if (err)
+ goto out_acc;
+
+ vol->eba_tbl = kmalloc(vol->reserved_pebs * sizeof(int), GFP_KERNEL);
+ if (!vol->eba_tbl) {
+ err = -ENOMEM;
+ goto out_acc;
+ }
+
+ for (i = 0; i < vol->reserved_pebs; i++)
+ vol->eba_tbl[i] = UBI_LEB_UNMAPPED;
+
+ if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
+ vol->used_ebs = vol->reserved_pebs;
+ vol->last_eb_bytes = vol->usable_leb_size;
+ vol->used_bytes =
+ (long long)vol->used_ebs * vol->usable_leb_size;
+ } else {
+ bytes = vol->used_bytes;
+ vol->last_eb_bytes = do_div(bytes, vol->usable_leb_size);
+ vol->used_ebs = bytes;
+ if (vol->last_eb_bytes)
+ vol->used_ebs += 1;
+ else
+ vol->last_eb_bytes = vol->usable_leb_size;
+ }
+
+ /* Register character device for the volume */
+ cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
+#ifdef UBI_LINUX
+ vol->cdev.owner = THIS_MODULE;
+#endif
+ dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
+ err = cdev_add(&vol->cdev, dev, 1);
+ if (err) {
+ ubi_err("cannot add character device");
+ goto out_mapping;
+ }
+
+ err = ubi_create_gluebi(ubi, vol);
+ if (err)
+ goto out_cdev;
+
+ vol->dev.release = vol_release;
+ vol->dev.parent = &ubi->dev;
+ vol->dev.devt = dev;
+ vol->dev.class = ubi_class;
+
+ sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
+ err = device_register(&vol->dev);
+ if (err) {
+ ubi_err("cannot register device");
+ goto out_gluebi;
+ }
+
+ err = volume_sysfs_init(ubi, vol);
+ if (err)
+ goto out_sysfs;
+
+ /* Fill volume table record */
+ memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
+ vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs);
+ vtbl_rec.alignment = cpu_to_be32(vol->alignment);
+ vtbl_rec.data_pad = cpu_to_be32(vol->data_pad);
+ vtbl_rec.name_len = cpu_to_be16(vol->name_len);
+ if (vol->vol_type == UBI_DYNAMIC_VOLUME)
+ vtbl_rec.vol_type = UBI_VID_DYNAMIC;
+ else
+ vtbl_rec.vol_type = UBI_VID_STATIC;
+ memcpy(vtbl_rec.name, vol->name, vol->name_len + 1);
+
+ err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
+ if (err)
+ goto out_sysfs;
+
+ spin_lock(&ubi->volumes_lock);
+ ubi->volumes[vol_id] = vol;
+ ubi->vol_count += 1;
+ spin_unlock(&ubi->volumes_lock);
+
+ paranoid_check_volumes(ubi);
+ return 0;
+
+out_sysfs:
+ /*
+ * We have registered our device, we should not free the volume*
+ * description object in this function in case of an error - it is
+ * freed by the release function.
+ *
+ * Get device reference to prevent the release function from being
+ * called just after sysfs has been closed.
+ */
+ dont_free = 1;
+ get_device(&vol->dev);
+ volume_sysfs_close(vol);
+out_gluebi:
+ if (ubi_destroy_gluebi(vol))
+ dbg_err("cannot destroy gluebi for volume %d:%d",
+ ubi->ubi_num, vol_id);
+out_cdev:
+ cdev_del(&vol->cdev);
+out_mapping:
+ kfree(vol->eba_tbl);
+out_acc:
+ spin_lock(&ubi->volumes_lock);
+ ubi->rsvd_pebs -= vol->reserved_pebs;
+ ubi->avail_pebs += vol->reserved_pebs;
+out_unlock:
+ spin_unlock(&ubi->volumes_lock);
+ if (dont_free)
+ put_device(&vol->dev);
+ else
+ kfree(vol);
+ ubi_err("cannot create volume %d, error %d", vol_id, err);
+ return err;
+}
+
+/**
+ * ubi_remove_volume - remove volume.
+ * @desc: volume descriptor
+ *
+ * This function removes volume described by @desc. The volume has to be opened
+ * in "exclusive" mode. Returns zero in case of success and a negative error
+ * code in case of failure. The caller has to have the @ubi->volumes_mutex
+ * locked.
+ */
+int ubi_remove_volume(struct ubi_volume_desc *desc)
+{
+ struct ubi_volume *vol = desc->vol;
+ struct ubi_device *ubi = vol->ubi;
+ int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs;
+
+ dbg_msg("remove UBI volume %d", vol_id);
+ ubi_assert(desc->mode == UBI_EXCLUSIVE);
+ ubi_assert(vol == ubi->volumes[vol_id]);
+
+ if (ubi->ro_mode)
+ return -EROFS;
+
+ spin_lock(&ubi->volumes_lock);
+ if (vol->ref_count > 1) {
+ /*
+ * The volume is busy, probably someone is reading one of its
+ * sysfs files.
+ */
+ err = -EBUSY;
+ goto out_unlock;
+ }
+ ubi->volumes[vol_id] = NULL;
+ spin_unlock(&ubi->volumes_lock);
+
+ err = ubi_destroy_gluebi(vol);
+ if (err)
+ goto out_err;
+
+ err = ubi_change_vtbl_record(ubi, vol_id, NULL);
+ if (err)
+ goto out_err;
+
+ for (i = 0; i < vol->reserved_pebs; i++) {
+ err = ubi_eba_unmap_leb(ubi, vol, i);
+ if (err)
+ goto out_err;
+ }
+
+ kfree(vol->eba_tbl);
+ vol->eba_tbl = NULL;
+ cdev_del(&vol->cdev);
+ volume_sysfs_close(vol);
+
+ spin_lock(&ubi->volumes_lock);
+ ubi->rsvd_pebs -= reserved_pebs;
+ ubi->avail_pebs += reserved_pebs;
+ i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
+ if (i > 0) {
+ i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
+ ubi->avail_pebs -= i;
+ ubi->rsvd_pebs += i;
+ ubi->beb_rsvd_pebs += i;
+ if (i > 0)
+ ubi_msg("reserve more %d PEBs", i);
+ }
+ ubi->vol_count -= 1;
+ spin_unlock(&ubi->volumes_lock);
+
+ paranoid_check_volumes(ubi);
+ return 0;
+
+out_err:
+ ubi_err("cannot remove volume %d, error %d", vol_id, err);
+ spin_lock(&ubi->volumes_lock);
+ ubi->volumes[vol_id] = vol;
+out_unlock:
+ spin_unlock(&ubi->volumes_lock);
+ return err;
+}
+
+/**
+ * ubi_resize_volume - re-size volume.
+ * @desc: volume descriptor
+ * @reserved_pebs: new size in physical eraseblocks
+ *
+ * This function re-sizes the volume and returns zero in case of success, and a
+ * negative error code in case of failure. The caller has to have the
+ * @ubi->volumes_mutex locked.
+ */
+int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
+{
+ int i, err, pebs, *new_mapping;
+ struct ubi_volume *vol = desc->vol;
+ struct ubi_device *ubi = vol->ubi;
+ struct ubi_vtbl_record vtbl_rec;
+ int vol_id = vol->vol_id;
+
+ if (ubi->ro_mode)
+ return -EROFS;
+
+ dbg_msg("re-size volume %d to from %d to %d PEBs",
+ vol_id, vol->reserved_pebs, reserved_pebs);
+
+ if (vol->vol_type == UBI_STATIC_VOLUME &&
+ reserved_pebs < vol->used_ebs) {
+ dbg_err("too small size %d, %d LEBs contain data",
+ reserved_pebs, vol->used_ebs);
+ return -EINVAL;
+ }
+
+ /* If the size is the same, we have nothing to do */
+ if (reserved_pebs == vol->reserved_pebs)
+ return 0;
+
+ new_mapping = kmalloc(reserved_pebs * sizeof(int), GFP_KERNEL);
+ if (!new_mapping)
+ return -ENOMEM;
+
+ for (i = 0; i < reserved_pebs; i++)
+ new_mapping[i] = UBI_LEB_UNMAPPED;
+
+ spin_lock(&ubi->volumes_lock);
+ if (vol->ref_count > 1) {
+ spin_unlock(&ubi->volumes_lock);
+ err = -EBUSY;
+ goto out_free;
+ }
+ spin_unlock(&ubi->volumes_lock);
+
+ /* Reserve physical eraseblocks */
+ pebs = reserved_pebs - vol->reserved_pebs;
+ if (pebs > 0) {
+ spin_lock(&ubi->volumes_lock);
+ if (pebs > ubi->avail_pebs) {
+ dbg_err("not enough PEBs: requested %d, available %d",
+ pebs, ubi->avail_pebs);
+ spin_unlock(&ubi->volumes_lock);
+ err = -ENOSPC;
+ goto out_free;
+ }
+ ubi->avail_pebs -= pebs;
+ ubi->rsvd_pebs += pebs;
+ for (i = 0; i < vol->reserved_pebs; i++)
+ new_mapping[i] = vol->eba_tbl[i];
+ kfree(vol->eba_tbl);
+ vol->eba_tbl = new_mapping;
+ spin_unlock(&ubi->volumes_lock);
+ }
+
+ /* Change volume table record */
+ memcpy(&vtbl_rec, &ubi->vtbl[vol_id], sizeof(struct ubi_vtbl_record));
+ vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
+ err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
+ if (err)
+ goto out_acc;
+
+ if (pebs < 0) {
+ for (i = 0; i < -pebs; i++) {
+ err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
+ if (err)
+ goto out_acc;
+ }
+ spin_lock(&ubi->volumes_lock);
+ ubi->rsvd_pebs += pebs;
+ ubi->avail_pebs -= pebs;
+ pebs = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
+ if (pebs > 0) {
+ pebs = ubi->avail_pebs >= pebs ? pebs : ubi->avail_pebs;
+ ubi->avail_pebs -= pebs;
+ ubi->rsvd_pebs += pebs;
+ ubi->beb_rsvd_pebs += pebs;
+ if (pebs > 0)
+ ubi_msg("reserve more %d PEBs", pebs);
+ }
+ for (i = 0; i < reserved_pebs; i++)
+ new_mapping[i] = vol->eba_tbl[i];
+ kfree(vol->eba_tbl);
+ vol->eba_tbl = new_mapping;
+ spin_unlock(&ubi->volumes_lock);
+ }
+
+ vol->reserved_pebs = reserved_pebs;
+ if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
+ vol->used_ebs = reserved_pebs;
+ vol->last_eb_bytes = vol->usable_leb_size;
+ vol->used_bytes =
+ (long long)vol->used_ebs * vol->usable_leb_size;
+ }
+
+ paranoid_check_volumes(ubi);
+ return 0;
+
+out_acc:
+ if (pebs > 0) {
+ spin_lock(&ubi->volumes_lock);
+ ubi->rsvd_pebs -= pebs;
+ ubi->avail_pebs += pebs;
+ spin_unlock(&ubi->volumes_lock);
+ }
+out_free:
+ kfree(new_mapping);
+ return err;
+}
+
+/**
+ * ubi_add_volume - add volume.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ *
+ * This function adds an existing volume and initializes all its data
+ * structures. Returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
+{
+ int err, vol_id = vol->vol_id;
+ dev_t dev;
+
+ dbg_msg("add volume %d", vol_id);
+ ubi_dbg_dump_vol_info(vol);
+
+ /* Register character device for the volume */
+ cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
+#ifdef UBI_LINUX
+ vol->cdev.owner = THIS_MODULE;
+#endif
+ dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
+ err = cdev_add(&vol->cdev, dev, 1);
+ if (err) {
+ ubi_err("cannot add character device for volume %d, error %d",
+ vol_id, err);
+ return err;
+ }
+
+ err = ubi_create_gluebi(ubi, vol);
+ if (err)
+ goto out_cdev;
+
+ vol->dev.release = vol_release;
+ vol->dev.parent = &ubi->dev;
+ vol->dev.devt = dev;
+ vol->dev.class = ubi_class;
+ sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
+ err = device_register(&vol->dev);
+ if (err)
+ goto out_gluebi;
+
+ err = volume_sysfs_init(ubi, vol);
+ if (err) {
+ cdev_del(&vol->cdev);
+ err = ubi_destroy_gluebi(vol);
+ volume_sysfs_close(vol);
+ return err;
+ }
+
+ paranoid_check_volumes(ubi);
+ return 0;
+
+out_gluebi:
+ err = ubi_destroy_gluebi(vol);
+out_cdev:
+ cdev_del(&vol->cdev);
+ return err;
+}
+
+/**
+ * ubi_free_volume - free volume.
+ * @ubi: UBI device description object
+ * @vol: volume description object
+ *
+ * This function frees all resources for volume @vol but does not remove it.
+ * Used only when the UBI device is detached.
+ */
+void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol)
+{
+ int err;
+
+ dbg_msg("free volume %d", vol->vol_id);
+
+ ubi->volumes[vol->vol_id] = NULL;
+ err = ubi_destroy_gluebi(vol);
+ cdev_del(&vol->cdev);
+ volume_sysfs_close(vol);
+}
+
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
+
+/**
+ * paranoid_check_volume - check volume information.
+ * @ubi: UBI device description object
+ * @vol_id: volume ID
+ */
+static void paranoid_check_volume(struct ubi_device *ubi, int vol_id)
+{
+ int idx = vol_id2idx(ubi, vol_id);
+ int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
+ const struct ubi_volume *vol;
+ long long n;
+ const char *name;
+
+ spin_lock(&ubi->volumes_lock);
+ reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
+ vol = ubi->volumes[idx];
+
+ if (!vol) {
+ if (reserved_pebs) {
+ ubi_err("no volume info, but volume exists");
+ goto fail;
+ }
+ spin_unlock(&ubi->volumes_lock);
+ return;
+ }
+
+ if (vol->exclusive) {
+ /*
+ * The volume may be being created at the moment, do not check
+ * it (e.g., it may be in the middle of ubi_create_volume().
+ */
+ spin_unlock(&ubi->volumes_lock);
+ return;
+ }
+
+ if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
+ vol->name_len < 0) {
+ ubi_err("negative values");
+ goto fail;
+ }
+ if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
+ ubi_err("bad alignment");
+ goto fail;
+ }
+
+ n = vol->alignment & (ubi->min_io_size - 1);
+ if (vol->alignment != 1 && n) {
+ ubi_err("alignment is not multiple of min I/O unit");
+ goto fail;
+ }
+
+ n = ubi->leb_size % vol->alignment;
+ if (vol->data_pad != n) {
+ ubi_err("bad data_pad, has to be %lld", n);
+ goto fail;
+ }
+
+ if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
+ vol->vol_type != UBI_STATIC_VOLUME) {
+ ubi_err("bad vol_type");
+ goto fail;
+ }
+
+ if (vol->upd_marker && vol->corrupted) {
+ dbg_err("update marker and corrupted simultaneously");
+ goto fail;
+ }
+
+ if (vol->reserved_pebs > ubi->good_peb_count) {
+ ubi_err("too large reserved_pebs");
+ goto fail;
+ }
+
+ n = ubi->leb_size - vol->data_pad;
+ if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
+ ubi_err("bad usable_leb_size, has to be %lld", n);
+ goto fail;
+ }
+
+ if (vol->name_len > UBI_VOL_NAME_MAX) {
+ ubi_err("too long volume name, max is %d", UBI_VOL_NAME_MAX);
+ goto fail;
+ }
+
+ if (!vol->name) {
+ ubi_err("NULL volume name");
+ goto fail;
+ }
+
+ n = strnlen(vol->name, vol->name_len + 1);
+ if (n != vol->name_len) {
+ ubi_err("bad name_len %lld", n);
+ goto fail;
+ }
+
+ n = (long long)vol->used_ebs * vol->usable_leb_size;
+ if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
+ if (vol->corrupted) {
+ ubi_err("corrupted dynamic volume");
+ goto fail;
+ }
+ if (vol->used_ebs != vol->reserved_pebs) {
+ ubi_err("bad used_ebs");
+ goto fail;
+ }
+ if (vol->last_eb_bytes != vol->usable_leb_size) {
+ ubi_err("bad last_eb_bytes");
+ goto fail;
+ }
+ if (vol->used_bytes != n) {
+ ubi_err("bad used_bytes");
+ goto fail;
+ }
+ } else {
+ if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
+ ubi_err("bad used_ebs");
+ goto fail;
+ }
+ if (vol->last_eb_bytes < 0 ||
+ vol->last_eb_bytes > vol->usable_leb_size) {
+ ubi_err("bad last_eb_bytes");
+ goto fail;
+ }
+ if (vol->used_bytes < 0 || vol->used_bytes > n ||
+ vol->used_bytes < n - vol->usable_leb_size) {
+ ubi_err("bad used_bytes");
+ goto fail;
+ }
+ }
+
+ alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment);
+ data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad);
+ name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len);
+ upd_marker = ubi->vtbl[vol_id].upd_marker;
+ name = &ubi->vtbl[vol_id].name[0];
+ if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC)
+ vol_type = UBI_DYNAMIC_VOLUME;
+ else
+ vol_type = UBI_STATIC_VOLUME;
+
+ if (alignment != vol->alignment || data_pad != vol->data_pad ||
+ upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
+ name_len!= vol->name_len || strncmp(name, vol->name, name_len)) {
+ ubi_err("volume info is different");
+ goto fail;
+ }
+
+ spin_unlock(&ubi->volumes_lock);
+ return;
+
+fail:
+ ubi_err("paranoid check failed for volume %d", vol_id);
+ ubi_dbg_dump_vol_info(vol);
+ ubi_dbg_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
+ spin_unlock(&ubi->volumes_lock);
+ BUG();
+}
+
+/**
+ * paranoid_check_volumes - check information about all volumes.
+ * @ubi: UBI device description object
+ */
+static void paranoid_check_volumes(struct ubi_device *ubi)
+{
+ int i;
+
+ for (i = 0; i < ubi->vtbl_slots; i++)
+ paranoid_check_volume(ubi, i);
+}
+#endif
diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c
new file mode 100644
index 0000000..765c811
--- /dev/null
+++ b/drivers/mtd/ubi/vtbl.c
@@ -0,0 +1,837 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ * Copyright (c) Nokia Corporation, 2006, 2007
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+/*
+ * This file includes volume table manipulation code. The volume table is an
+ * on-flash table containing volume meta-data like name, number of reserved
+ * physical eraseblocks, type, etc. The volume table is stored in the so-called
+ * "layout volume".
+ *
+ * The layout volume is an internal volume which is organized as follows. It
+ * consists of two logical eraseblocks - LEB 0 and LEB 1. Each logical
+ * eraseblock stores one volume table copy, i.e. LEB 0 and LEB 1 duplicate each
+ * other. This redundancy guarantees robustness to unclean reboots. The volume
+ * table is basically an array of volume table records. Each record contains
+ * full information about the volume and protected by a CRC checksum.
+ *
+ * The volume table is changed, it is first changed in RAM. Then LEB 0 is
+ * erased, and the updated volume table is written back to LEB 0. Then same for
+ * LEB 1. This scheme guarantees recoverability from unclean reboots.
+ *
+ * In this UBI implementation the on-flash volume table does not contain any
+ * information about how many data static volumes contain. This information may
+ * be found from the scanning data.
+ *
+ * But it would still be beneficial to store this information in the volume
+ * table. For example, suppose we have a static volume X, and all its physical
+ * eraseblocks became bad for some reasons. Suppose we are attaching the
+ * corresponding MTD device, the scanning has found no logical eraseblocks
+ * corresponding to the volume X. According to the volume table volume X does
+ * exist. So we don't know whether it is just empty or all its physical
+ * eraseblocks went bad. So we cannot alarm the user about this corruption.
+ *
+ * The volume table also stores so-called "update marker", which is used for
+ * volume updates. Before updating the volume, the update marker is set, and
+ * after the update operation is finished, the update marker is cleared. So if
+ * the update operation was interrupted (e.g. by an unclean reboot) - the
+ * update marker is still there and we know that the volume's contents is
+ * damaged.
+ */
+
+#ifdef UBI_LINUX
+#include <linux/crc32.h>
+#include <linux/err.h>
+#include <asm/div64.h>
+#endif
+
+#include "ubi-barebox.h"
+#include "ubi.h"
+
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
+static void paranoid_vtbl_check(const struct ubi_device *ubi);
+#else
+#define paranoid_vtbl_check(ubi)
+#endif
+
+/* Empty volume table record */
+static struct ubi_vtbl_record empty_vtbl_record;
+
+/**
+ * ubi_change_vtbl_record - change volume table record.
+ * @ubi: UBI device description object
+ * @idx: table index to change
+ * @vtbl_rec: new volume table record
+ *
+ * This function changes volume table record @idx. If @vtbl_rec is %NULL, empty
+ * volume table record is written. The caller does not have to calculate CRC of
+ * the record as it is done by this function. Returns zero in case of success
+ * and a negative error code in case of failure.
+ */
+int ubi_change_vtbl_record(struct ubi_device *ubi, int idx,
+ struct ubi_vtbl_record *vtbl_rec)
+{
+ int i, err;
+ uint32_t crc;
+ struct ubi_volume *layout_vol;
+
+ ubi_assert(idx >= 0 && idx < ubi->vtbl_slots);
+ layout_vol = ubi->volumes[vol_id2idx(ubi, UBI_LAYOUT_VOLUME_ID)];
+
+ if (!vtbl_rec)
+ vtbl_rec = &empty_vtbl_record;
+ else {
+ crc = crc32(UBI_CRC32_INIT, vtbl_rec, UBI_VTBL_RECORD_SIZE_CRC);
+ vtbl_rec->crc = cpu_to_be32(crc);
+ }
+
+ memcpy(&ubi->vtbl[idx], vtbl_rec, sizeof(struct ubi_vtbl_record));
+ for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
+ err = ubi_eba_unmap_leb(ubi, layout_vol, i);
+ if (err)
+ return err;
+
+ err = ubi_eba_write_leb(ubi, layout_vol, i, ubi->vtbl, 0,
+ ubi->vtbl_size, UBI_LONGTERM);
+ if (err)
+ return err;
+ }
+
+ paranoid_vtbl_check(ubi);
+ return 0;
+}
+
+/**
+ * vtbl_check - check if volume table is not corrupted and contains sensible
+ * data.
+ * @ubi: UBI device description object
+ * @vtbl: volume table
+ *
+ * This function returns zero if @vtbl is all right, %1 if CRC is incorrect,
+ * and %-EINVAL if it contains inconsistent data.
+ */
+static int vtbl_check(const struct ubi_device *ubi,
+ const struct ubi_vtbl_record *vtbl)
+{
+ int i, n, reserved_pebs, alignment, data_pad, vol_type, name_len;
+ int upd_marker, err;
+ uint32_t crc;
+ const char *name;
+
+ for (i = 0; i < ubi->vtbl_slots; i++) {
+ cond_resched();
+
+ reserved_pebs = be32_to_cpu(vtbl[i].reserved_pebs);
+ alignment = be32_to_cpu(vtbl[i].alignment);
+ data_pad = be32_to_cpu(vtbl[i].data_pad);
+ upd_marker = vtbl[i].upd_marker;
+ vol_type = vtbl[i].vol_type;
+ name_len = be16_to_cpu(vtbl[i].name_len);
+ name = (const char *) &vtbl[i].name[0];
+
+ crc = crc32(UBI_CRC32_INIT, &vtbl[i], UBI_VTBL_RECORD_SIZE_CRC);
+ if (be32_to_cpu(vtbl[i].crc) != crc) {
+ ubi_err("bad CRC at record %u: %#08x, not %#08x",
+ i, crc, be32_to_cpu(vtbl[i].crc));
+ ubi_dbg_dump_vtbl_record(&vtbl[i], i);
+ return 1;
+ }
+
+ if (reserved_pebs == 0) {
+ if (memcmp(&vtbl[i], &empty_vtbl_record,
+ UBI_VTBL_RECORD_SIZE)) {
+ err = 2;
+ goto bad;
+ }
+ continue;
+ }
+
+ if (reserved_pebs < 0 || alignment < 0 || data_pad < 0 ||
+ name_len < 0) {
+ err = 3;
+ goto bad;
+ }
+
+ if (alignment > ubi->leb_size || alignment == 0) {
+ err = 4;
+ goto bad;
+ }
+
+ n = alignment & (ubi->min_io_size - 1);
+ if (alignment != 1 && n) {
+ err = 5;
+ goto bad;
+ }
+
+ n = ubi->leb_size % alignment;
+ if (data_pad != n) {
+ dbg_err("bad data_pad, has to be %d", n);
+ err = 6;
+ goto bad;
+ }
+
+ if (vol_type != UBI_VID_DYNAMIC && vol_type != UBI_VID_STATIC) {
+ err = 7;
+ goto bad;
+ }
+
+ if (upd_marker != 0 && upd_marker != 1) {
+ err = 8;
+ goto bad;
+ }
+
+ if (reserved_pebs > ubi->good_peb_count) {
+ dbg_err("too large reserved_pebs, good PEBs %d",
+ ubi->good_peb_count);
+ err = 9;
+ goto bad;
+ }
+
+ if (name_len > UBI_VOL_NAME_MAX) {
+ err = 10;
+ goto bad;
+ }
+
+ if (name[0] == '\0') {
+ err = 11;
+ goto bad;
+ }
+
+ if (name_len != strnlen(name, name_len + 1)) {
+ err = 12;
+ goto bad;
+ }
+ }
+
+ /* Checks that all names are unique */
+ for (i = 0; i < ubi->vtbl_slots - 1; i++) {
+ for (n = i + 1; n < ubi->vtbl_slots; n++) {
+ int len1 = be16_to_cpu(vtbl[i].name_len);
+ int len2 = be16_to_cpu(vtbl[n].name_len);
+
+ if (len1 > 0 && len1 == len2 &&
+ !strncmp((char *)vtbl[i].name, (char *)vtbl[n].name, len1)) {
+ ubi_err("volumes %d and %d have the same name"
+ " \"%s\"", i, n, vtbl[i].name);
+ ubi_dbg_dump_vtbl_record(&vtbl[i], i);
+ ubi_dbg_dump_vtbl_record(&vtbl[n], n);
+ return -EINVAL;
+ }
+ }
+ }
+
+ return 0;
+
+bad:
+ ubi_err("volume table check failed: record %d, error %d", i, err);
+ ubi_dbg_dump_vtbl_record(&vtbl[i], i);
+ return -EINVAL;
+}
+
+/**
+ * create_vtbl - create a copy of volume table.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ * @copy: number of the volume table copy
+ * @vtbl: contents of the volume table
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int create_vtbl(struct ubi_device *ubi, struct ubi_scan_info *si,
+ int copy, void *vtbl)
+{
+ int err, tries = 0;
+ static struct ubi_vid_hdr *vid_hdr;
+ struct ubi_scan_volume *sv;
+ struct ubi_scan_leb *new_seb, *old_seb = NULL;
+
+ ubi_msg("create volume table (copy #%d)", copy + 1);
+
+ vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL);
+ if (!vid_hdr)
+ return -ENOMEM;
+
+ /*
+ * Check if there is a logical eraseblock which would have to contain
+ * this volume table copy was found during scanning. It has to be wiped
+ * out.
+ */
+ sv = ubi_scan_find_sv(si, UBI_LAYOUT_VOLUME_ID);
+ if (sv)
+ old_seb = ubi_scan_find_seb(sv, copy);
+
+retry:
+ new_seb = ubi_scan_get_free_peb(ubi, si);
+ if (IS_ERR(new_seb)) {
+ err = PTR_ERR(new_seb);
+ goto out_free;
+ }
+
+ vid_hdr->vol_type = UBI_VID_DYNAMIC;
+ vid_hdr->vol_id = cpu_to_be32(UBI_LAYOUT_VOLUME_ID);
+ vid_hdr->compat = UBI_LAYOUT_VOLUME_COMPAT;
+ vid_hdr->data_size = vid_hdr->used_ebs =
+ vid_hdr->data_pad = cpu_to_be32(0);
+ vid_hdr->lnum = cpu_to_be32(copy);
+ vid_hdr->sqnum = cpu_to_be64(++si->max_sqnum);
+ vid_hdr->leb_ver = cpu_to_be32(old_seb ? old_seb->leb_ver + 1: 0);
+
+ /* The EC header is already there, write the VID header */
+ err = ubi_io_write_vid_hdr(ubi, new_seb->pnum, vid_hdr);
+ if (err)
+ goto write_error;
+
+ /* Write the layout volume contents */
+ err = ubi_io_write_data(ubi, vtbl, new_seb->pnum, 0, ubi->vtbl_size);
+ if (err)
+ goto write_error;
+
+ /*
+ * And add it to the scanning information. Don't delete the old
+ * @old_seb as it will be deleted and freed in 'ubi_scan_add_used()'.
+ */
+ err = ubi_scan_add_used(ubi, si, new_seb->pnum, new_seb->ec,
+ vid_hdr, 0);
+ kfree(new_seb);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return err;
+
+write_error:
+ if (err == -EIO && ++tries <= 5) {
+ /*
+ * Probably this physical eraseblock went bad, try to pick
+ * another one.
+ */
+ list_add_tail(&new_seb->u.list, &si->corr);
+ goto retry;
+ }
+ kfree(new_seb);
+out_free:
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return err;
+
+}
+
+/**
+ * process_lvol - process the layout volume.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ * @sv: layout volume scanning information
+ *
+ * This function is responsible for reading the layout volume, ensuring it is
+ * not corrupted, and recovering from corruptions if needed. Returns volume
+ * table in case of success and a negative error code in case of failure.
+ */
+static struct ubi_vtbl_record *process_lvol(struct ubi_device *ubi,
+ struct ubi_scan_info *si,
+ struct ubi_scan_volume *sv)
+{
+ int err;
+ struct rb_node *rb;
+ struct ubi_scan_leb *seb;
+ struct ubi_vtbl_record *leb[UBI_LAYOUT_VOLUME_EBS] = { NULL, NULL };
+ int leb_corrupted[UBI_LAYOUT_VOLUME_EBS] = {1, 1};
+
+ /*
+ * UBI goes through the following steps when it changes the layout
+ * volume:
+ * a. erase LEB 0;
+ * b. write new data to LEB 0;
+ * c. erase LEB 1;
+ * d. write new data to LEB 1.
+ *
+ * Before the change, both LEBs contain the same data.
+ *
+ * Due to unclean reboots, the contents of LEB 0 may be lost, but there
+ * should LEB 1. So it is OK if LEB 0 is corrupted while LEB 1 is not.
+ * Similarly, LEB 1 may be lost, but there should be LEB 0. And
+ * finally, unclean reboots may result in a situation when neither LEB
+ * 0 nor LEB 1 are corrupted, but they are different. In this case, LEB
+ * 0 contains more recent information.
+ *
+ * So the plan is to first check LEB 0. Then
+ * a. if LEB 0 is OK, it must be containing the most resent data; then
+ * we compare it with LEB 1, and if they are different, we copy LEB
+ * 0 to LEB 1;
+ * b. if LEB 0 is corrupted, but LEB 1 has to be OK, and we copy LEB 1
+ * to LEB 0.
+ */
+
+ dbg_msg("check layout volume");
+
+ /* Read both LEB 0 and LEB 1 into memory */
+ ubi_rb_for_each_entry(rb, seb, &sv->root, u.rb) {
+ leb[seb->lnum] = vmalloc(ubi->vtbl_size);
+ if (!leb[seb->lnum]) {
+ err = -ENOMEM;
+ goto out_free;
+ }
+ memset(leb[seb->lnum], 0, ubi->vtbl_size);
+
+ err = ubi_io_read_data(ubi, leb[seb->lnum], seb->pnum, 0,
+ ubi->vtbl_size);
+ if (err == UBI_IO_BITFLIPS || err == -EBADMSG)
+ /*
+ * Scrub the PEB later. Note, -EBADMSG indicates an
+ * uncorrectable ECC error, but we have our own CRC and
+ * the data will be checked later. If the data is OK,
+ * the PEB will be scrubbed (because we set
+ * seb->scrub). If the data is not OK, the contents of
+ * the PEB will be recovered from the second copy, and
+ * seb->scrub will be cleared in
+ * 'ubi_scan_add_used()'.
+ */
+ seb->scrub = 1;
+ else if (err)
+ goto out_free;
+ }
+
+ err = -EINVAL;
+ if (leb[0]) {
+ leb_corrupted[0] = vtbl_check(ubi, leb[0]);
+ if (leb_corrupted[0] < 0)
+ goto out_free;
+ }
+
+ if (!leb_corrupted[0]) {
+ /* LEB 0 is OK */
+ if (leb[1])
+ leb_corrupted[1] = memcmp(leb[0], leb[1], ubi->vtbl_size);
+ if (leb_corrupted[1]) {
+ ubi_warn("volume table copy #2 is corrupted");
+ err = create_vtbl(ubi, si, 1, leb[0]);
+ if (err)
+ goto out_free;
+ ubi_msg("volume table was restored");
+ }
+
+ /* Both LEB 1 and LEB 2 are OK and consistent */
+ vfree(leb[1]);
+ return leb[0];
+ } else {
+ /* LEB 0 is corrupted or does not exist */
+ if (leb[1]) {
+ leb_corrupted[1] = vtbl_check(ubi, leb[1]);
+ if (leb_corrupted[1] < 0)
+ goto out_free;
+ }
+ if (leb_corrupted[1]) {
+ /* Both LEB 0 and LEB 1 are corrupted */
+ ubi_err("both volume tables are corrupted");
+ goto out_free;
+ }
+
+ ubi_warn("volume table copy #1 is corrupted");
+ err = create_vtbl(ubi, si, 0, leb[1]);
+ if (err)
+ goto out_free;
+ ubi_msg("volume table was restored");
+
+ vfree(leb[0]);
+ return leb[1];
+ }
+
+out_free:
+ vfree(leb[0]);
+ vfree(leb[1]);
+ return ERR_PTR(err);
+}
+
+/**
+ * create_empty_lvol - create empty layout volume.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ *
+ * This function returns volume table contents in case of success and a
+ * negative error code in case of failure.
+ */
+static struct ubi_vtbl_record *create_empty_lvol(struct ubi_device *ubi,
+ struct ubi_scan_info *si)
+{
+ int i;
+ struct ubi_vtbl_record *vtbl;
+
+ vtbl = vmalloc(ubi->vtbl_size);
+ if (!vtbl)
+ return ERR_PTR(-ENOMEM);
+ memset(vtbl, 0, ubi->vtbl_size);
+
+ for (i = 0; i < ubi->vtbl_slots; i++)
+ memcpy(&vtbl[i], &empty_vtbl_record, UBI_VTBL_RECORD_SIZE);
+
+ for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
+ int err;
+
+ err = create_vtbl(ubi, si, i, vtbl);
+ if (err) {
+ vfree(vtbl);
+ return ERR_PTR(err);
+ }
+ }
+
+ return vtbl;
+}
+
+/**
+ * init_volumes - initialize volume information for existing volumes.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ * @vtbl: volume table
+ *
+ * This function allocates volume description objects for existing volumes.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+static int init_volumes(struct ubi_device *ubi, const struct ubi_scan_info *si,
+ const struct ubi_vtbl_record *vtbl)
+{
+ int i, reserved_pebs = 0;
+ struct ubi_scan_volume *sv;
+ struct ubi_volume *vol;
+
+ for (i = 0; i < ubi->vtbl_slots; i++) {
+ cond_resched();
+
+ if (be32_to_cpu(vtbl[i].reserved_pebs) == 0)
+ continue; /* Empty record */
+
+ vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
+ if (!vol)
+ return -ENOMEM;
+
+ vol->reserved_pebs = be32_to_cpu(vtbl[i].reserved_pebs);
+ vol->alignment = be32_to_cpu(vtbl[i].alignment);
+ vol->data_pad = be32_to_cpu(vtbl[i].data_pad);
+ vol->vol_type = vtbl[i].vol_type == UBI_VID_DYNAMIC ?
+ UBI_DYNAMIC_VOLUME : UBI_STATIC_VOLUME;
+ vol->name_len = be16_to_cpu(vtbl[i].name_len);
+ vol->usable_leb_size = ubi->leb_size - vol->data_pad;
+ memcpy(vol->name, vtbl[i].name, vol->name_len);
+ vol->name[vol->name_len] = '\0';
+ vol->vol_id = i;
+
+ if (vtbl[i].flags & UBI_VTBL_AUTORESIZE_FLG) {
+ /* Auto re-size flag may be set only for one volume */
+ if (ubi->autoresize_vol_id != -1) {
+ ubi_err("more then one auto-resize volume (%d "
+ "and %d)", ubi->autoresize_vol_id, i);
+ kfree(vol);
+ return -EINVAL;
+ }
+
+ ubi->autoresize_vol_id = i;
+ }
+
+ ubi_assert(!ubi->volumes[i]);
+ ubi->volumes[i] = vol;
+ ubi->vol_count += 1;
+ vol->ubi = ubi;
+ reserved_pebs += vol->reserved_pebs;
+
+ /*
+ * In case of dynamic volume UBI knows nothing about how many
+ * data is stored there. So assume the whole volume is used.
+ */
+ if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
+ vol->used_ebs = vol->reserved_pebs;
+ vol->last_eb_bytes = vol->usable_leb_size;
+ vol->used_bytes =
+ (long long)vol->used_ebs * vol->usable_leb_size;
+ continue;
+ }
+
+ /* Static volumes only */
+ sv = ubi_scan_find_sv(si, i);
+ if (!sv) {
+ /*
+ * No eraseblocks belonging to this volume found. We
+ * don't actually know whether this static volume is
+ * completely corrupted or just contains no data. And
+ * we cannot know this as long as data size is not
+ * stored on flash. So we just assume the volume is
+ * empty. FIXME: this should be handled.
+ */
+ continue;
+ }
+
+ if (sv->leb_count != sv->used_ebs) {
+ /*
+ * We found a static volume which misses several
+ * eraseblocks. Treat it as corrupted.
+ */
+ ubi_warn("static volume %d misses %d LEBs - corrupted",
+ sv->vol_id, sv->used_ebs - sv->leb_count);
+ vol->corrupted = 1;
+ continue;
+ }
+
+ vol->used_ebs = sv->used_ebs;
+ vol->used_bytes =
+ (long long)(vol->used_ebs - 1) * vol->usable_leb_size;
+ vol->used_bytes += sv->last_data_size;
+ vol->last_eb_bytes = sv->last_data_size;
+ }
+
+ /* And add the layout volume */
+ vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
+ if (!vol)
+ return -ENOMEM;
+
+ vol->reserved_pebs = UBI_LAYOUT_VOLUME_EBS;
+ vol->alignment = 1;
+ vol->vol_type = UBI_DYNAMIC_VOLUME;
+ vol->name_len = sizeof(UBI_LAYOUT_VOLUME_NAME) - 1;
+ memcpy(vol->name, UBI_LAYOUT_VOLUME_NAME, vol->name_len + 1);
+ vol->usable_leb_size = ubi->leb_size;
+ vol->used_ebs = vol->reserved_pebs;
+ vol->last_eb_bytes = vol->reserved_pebs;
+ vol->used_bytes =
+ (long long)vol->used_ebs * (ubi->leb_size - vol->data_pad);
+ vol->vol_id = UBI_LAYOUT_VOLUME_ID;
+ vol->ref_count = 1;
+
+ ubi_assert(!ubi->volumes[i]);
+ ubi->volumes[vol_id2idx(ubi, vol->vol_id)] = vol;
+ reserved_pebs += vol->reserved_pebs;
+ ubi->vol_count += 1;
+ vol->ubi = ubi;
+
+ if (reserved_pebs > ubi->avail_pebs)
+ ubi_err("not enough PEBs, required %d, available %d",
+ reserved_pebs, ubi->avail_pebs);
+ ubi->rsvd_pebs += reserved_pebs;
+ ubi->avail_pebs -= reserved_pebs;
+
+ return 0;
+}
+
+/**
+ * check_sv - check volume scanning information.
+ * @vol: UBI volume description object
+ * @sv: volume scanning information
+ *
+ * This function returns zero if the volume scanning information is consistent
+ * to the data read from the volume tabla, and %-EINVAL if not.
+ */
+static int check_sv(const struct ubi_volume *vol,
+ const struct ubi_scan_volume *sv)
+{
+ int err;
+
+ if (sv->highest_lnum >= vol->reserved_pebs) {
+ err = 1;
+ goto bad;
+ }
+ if (sv->leb_count > vol->reserved_pebs) {
+ err = 2;
+ goto bad;
+ }
+ if (sv->vol_type != vol->vol_type) {
+ err = 3;
+ goto bad;
+ }
+ if (sv->used_ebs > vol->reserved_pebs) {
+ err = 4;
+ goto bad;
+ }
+ if (sv->data_pad != vol->data_pad) {
+ err = 5;
+ goto bad;
+ }
+ return 0;
+
+bad:
+ ubi_err("bad scanning information, error %d", err);
+ ubi_dbg_dump_sv(sv);
+ ubi_dbg_dump_vol_info(vol);
+ return -EINVAL;
+}
+
+/**
+ * check_scanning_info - check that scanning information.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ *
+ * Even though we protect on-flash data by CRC checksums, we still don't trust
+ * the media. This function ensures that scanning information is consistent to
+ * the information read from the volume table. Returns zero if the scanning
+ * information is OK and %-EINVAL if it is not.
+ */
+static int check_scanning_info(const struct ubi_device *ubi,
+ struct ubi_scan_info *si)
+{
+ int err, i;
+ struct ubi_scan_volume *sv;
+ struct ubi_volume *vol;
+
+ if (si->vols_found > UBI_INT_VOL_COUNT + ubi->vtbl_slots) {
+ ubi_err("scanning found %d volumes, maximum is %d + %d",
+ si->vols_found, UBI_INT_VOL_COUNT, ubi->vtbl_slots);
+ return -EINVAL;
+ }
+
+ if (si->highest_vol_id >= ubi->vtbl_slots + UBI_INT_VOL_COUNT &&
+ si->highest_vol_id < UBI_INTERNAL_VOL_START) {
+ ubi_err("too large volume ID %d found by scanning",
+ si->highest_vol_id);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
+ cond_resched();
+
+ sv = ubi_scan_find_sv(si, i);
+ vol = ubi->volumes[i];
+ if (!vol) {
+ if (sv)
+ ubi_scan_rm_volume(si, sv);
+ continue;
+ }
+
+ if (vol->reserved_pebs == 0) {
+ ubi_assert(i < ubi->vtbl_slots);
+
+ if (!sv)
+ continue;
+
+ /*
+ * During scanning we found a volume which does not
+ * exist according to the information in the volume
+ * table. This must have happened due to an unclean
+ * reboot while the volume was being removed. Discard
+ * these eraseblocks.
+ */
+ ubi_msg("finish volume %d removal", sv->vol_id);
+ ubi_scan_rm_volume(si, sv);
+ } else if (sv) {
+ err = check_sv(vol, sv);
+ if (err)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * ubi_read_volume_table - read volume table.
+ * information.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ *
+ * This function reads volume table, checks it, recover from errors if needed,
+ * or creates it if needed. Returns zero in case of success and a negative
+ * error code in case of failure.
+ */
+int ubi_read_volume_table(struct ubi_device *ubi, struct ubi_scan_info *si)
+{
+ int i, err;
+ struct ubi_scan_volume *sv;
+
+ empty_vtbl_record.crc = cpu_to_be32(0xf116c36b);
+
+ /*
+ * The number of supported volumes is limited by the eraseblock size
+ * and by the UBI_MAX_VOLUMES constant.
+ */
+ ubi->vtbl_slots = ubi->leb_size / UBI_VTBL_RECORD_SIZE;
+ if (ubi->vtbl_slots > UBI_MAX_VOLUMES)
+ ubi->vtbl_slots = UBI_MAX_VOLUMES;
+
+ ubi->vtbl_size = ubi->vtbl_slots * UBI_VTBL_RECORD_SIZE;
+ ubi->vtbl_size = ALIGN(ubi->vtbl_size, ubi->min_io_size);
+
+ sv = ubi_scan_find_sv(si, UBI_LAYOUT_VOLUME_ID);
+ if (!sv) {
+ /*
+ * No logical eraseblocks belonging to the layout volume were
+ * found. This could mean that the flash is just empty. In
+ * this case we create empty layout volume.
+ *
+ * But if flash is not empty this must be a corruption or the
+ * MTD device just contains garbage.
+ */
+ if (si->is_empty) {
+ ubi->vtbl = create_empty_lvol(ubi, si);
+ if (IS_ERR(ubi->vtbl))
+ return PTR_ERR(ubi->vtbl);
+ } else {
+ ubi_err("the layout volume was not found");
+ return -EINVAL;
+ }
+ } else {
+ if (sv->leb_count > UBI_LAYOUT_VOLUME_EBS) {
+ /* This must not happen with proper UBI images */
+ dbg_err("too many LEBs (%d) in layout volume",
+ sv->leb_count);
+ return -EINVAL;
+ }
+
+ ubi->vtbl = process_lvol(ubi, si, sv);
+ if (IS_ERR(ubi->vtbl))
+ return PTR_ERR(ubi->vtbl);
+ }
+
+ ubi->avail_pebs = ubi->good_peb_count;
+
+ /*
+ * The layout volume is OK, initialize the corresponding in-RAM data
+ * structures.
+ */
+ err = init_volumes(ubi, si, ubi->vtbl);
+ if (err)
+ goto out_free;
+
+ /*
+ * Get sure that the scanning information is consistent to the
+ * information stored in the volume table.
+ */
+ err = check_scanning_info(ubi, si);
+ if (err)
+ goto out_free;
+
+ return 0;
+
+out_free:
+ vfree(ubi->vtbl);
+ for (i = 0; i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++)
+ if (ubi->volumes[i]) {
+ kfree(ubi->volumes[i]);
+ ubi->volumes[i] = NULL;
+ }
+ return err;
+}
+
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
+
+/**
+ * paranoid_vtbl_check - check volume table.
+ * @ubi: UBI device description object
+ */
+static void paranoid_vtbl_check(const struct ubi_device *ubi)
+{
+ if (vtbl_check(ubi, ubi->vtbl)) {
+ ubi_err("paranoid check failed");
+ BUG();
+ }
+}
+
+#endif /* CONFIG_MTD_UBI_DEBUG_PARANOID */
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
new file mode 100644
index 0000000..137e600
--- /dev/null
+++ b/drivers/mtd/ubi/wl.c
@@ -0,0 +1,1675 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Authors: Artem Bityutskiy (���������������� ����������), Thomas Gleixner
+ */
+
+/*
+ * UBI wear-leveling unit.
+ *
+ * This unit is responsible for wear-leveling. It works in terms of physical
+ * eraseblocks and erase counters and knows nothing about logical eraseblocks,
+ * volumes, etc. From this unit's perspective all physical eraseblocks are of
+ * two types - used and free. Used physical eraseblocks are those that were
+ * "get" by the 'ubi_wl_get_peb()' function, and free physical eraseblocks are
+ * those that were put by the 'ubi_wl_put_peb()' function.
+ *
+ * Physical eraseblocks returned by 'ubi_wl_get_peb()' have only erase counter
+ * header. The rest of the physical eraseblock contains only 0xFF bytes.
+ *
+ * When physical eraseblocks are returned to the WL unit by means of the
+ * 'ubi_wl_put_peb()' function, they are scheduled for erasure. The erasure is
+ * done asynchronously in context of the per-UBI device background thread,
+ * which is also managed by the WL unit.
+ *
+ * The wear-leveling is ensured by means of moving the contents of used
+ * physical eraseblocks with low erase counter to free physical eraseblocks
+ * with high erase counter.
+ *
+ * The 'ubi_wl_get_peb()' function accepts data type hints which help to pick
+ * an "optimal" physical eraseblock. For example, when it is known that the
+ * physical eraseblock will be "put" soon because it contains short-term data,
+ * the WL unit may pick a free physical eraseblock with low erase counter, and
+ * so forth.
+ *
+ * If the WL unit fails to erase a physical eraseblock, it marks it as bad.
+ *
+ * This unit is also responsible for scrubbing. If a bit-flip is detected in a
+ * physical eraseblock, it has to be moved. Technically this is the same as
+ * moving it for wear-leveling reasons.
+ *
+ * As it was said, for the UBI unit all physical eraseblocks are either "free"
+ * or "used". Free eraseblock are kept in the @wl->free RB-tree, while used
+ * eraseblocks are kept in a set of different RB-trees: @wl->used,
+ * @wl->prot.pnum, @wl->prot.aec, and @wl->scrub.
+ *
+ * Note, in this implementation, we keep a small in-RAM object for each physical
+ * eraseblock. This is surely not a scalable solution. But it appears to be good
+ * enough for moderately large flashes and it is simple. In future, one may
+ * re-work this unit and make it more scalable.
+ *
+ * At the moment this unit does not utilize the sequence number, which was
+ * introduced relatively recently. But it would be wise to do this because the
+ * sequence number of a logical eraseblock characterizes how old is it. For
+ * example, when we move a PEB with low erase counter, and we need to pick the
+ * target PEB, we pick a PEB with the highest EC if our PEB is "old" and we
+ * pick target PEB with an average EC if our PEB is not very "old". This is a
+ * room for future re-works of the WL unit.
+ *
+ * FIXME: looks too complex, should be simplified (later).
+ */
+
+#ifdef UBI_LINUX
+#include <linux/slab.h>
+#include <linux/crc32.h>
+#include <linux/freezer.h>
+#include <linux/kthread.h>
+#endif
+
+#include "ubi-barebox.h"
+#include "ubi.h"
+
+/* Number of physical eraseblocks reserved for wear-leveling purposes */
+#define WL_RESERVED_PEBS 1
+
+/*
+ * How many erase cycles are short term, unknown, and long term physical
+ * eraseblocks protected.
+ */
+#define ST_PROTECTION 16
+#define U_PROTECTION 10
+#define LT_PROTECTION 4
+
+/*
+ * Maximum difference between two erase counters. If this threshold is
+ * exceeded, the WL unit starts moving data from used physical eraseblocks with
+ * low erase counter to free physical eraseblocks with high erase counter.
+ */
+#define UBI_WL_THRESHOLD CONFIG_MTD_UBI_WL_THRESHOLD
+
+/*
+ * When a physical eraseblock is moved, the WL unit has to pick the target
+ * physical eraseblock to move to. The simplest way would be just to pick the
+ * one with the highest erase counter. But in certain workloads this could lead
+ * to an unlimited wear of one or few physical eraseblock. Indeed, imagine a
+ * situation when the picked physical eraseblock is constantly erased after the
+ * data is written to it. So, we have a constant which limits the highest erase
+ * counter of the free physical eraseblock to pick. Namely, the WL unit does
+ * not pick eraseblocks with erase counter greater then the lowest erase
+ * counter plus %WL_FREE_MAX_DIFF.
+ */
+#define WL_FREE_MAX_DIFF (2*UBI_WL_THRESHOLD)
+
+/*
+ * Maximum number of consecutive background thread failures which is enough to
+ * switch to read-only mode.
+ */
+#define WL_MAX_FAILURES 32
+
+/**
+ * struct ubi_wl_prot_entry - PEB protection entry.
+ * @rb_pnum: link in the @wl->prot.pnum RB-tree
+ * @rb_aec: link in the @wl->prot.aec RB-tree
+ * @abs_ec: the absolute erase counter value when the protection ends
+ * @e: the wear-leveling entry of the physical eraseblock under protection
+ *
+ * When the WL unit returns a physical eraseblock, the physical eraseblock is
+ * protected from being moved for some "time". For this reason, the physical
+ * eraseblock is not directly moved from the @wl->free tree to the @wl->used
+ * tree. There is one more tree in between where this physical eraseblock is
+ * temporarily stored (@wl->prot).
+ *
+ * All this protection stuff is needed because:
+ * o we don't want to move physical eraseblocks just after we have given them
+ * to the user; instead, we first want to let users fill them up with data;
+ *
+ * o there is a chance that the user will put the physical eraseblock very
+ * soon, so it makes sense not to move it for some time, but wait; this is
+ * especially important in case of "short term" physical eraseblocks.
+ *
+ * Physical eraseblocks stay protected only for limited time. But the "time" is
+ * measured in erase cycles in this case. This is implemented with help of the
+ * absolute erase counter (@wl->abs_ec). When it reaches certain value, the
+ * physical eraseblocks are moved from the protection trees (@wl->prot.*) to
+ * the @wl->used tree.
+ *
+ * Protected physical eraseblocks are searched by physical eraseblock number
+ * (when they are put) and by the absolute erase counter (to check if it is
+ * time to move them to the @wl->used tree). So there are actually 2 RB-trees
+ * storing the protected physical eraseblocks: @wl->prot.pnum and
+ * @wl->prot.aec. They are referred to as the "protection" trees. The
+ * first one is indexed by the physical eraseblock number. The second one is
+ * indexed by the absolute erase counter. Both trees store
+ * &struct ubi_wl_prot_entry objects.
+ *
+ * Each physical eraseblock has 2 main states: free and used. The former state
+ * corresponds to the @wl->free tree. The latter state is split up on several
+ * sub-states:
+ * o the WL movement is allowed (@wl->used tree);
+ * o the WL movement is temporarily prohibited (@wl->prot.pnum and
+ * @wl->prot.aec trees);
+ * o scrubbing is needed (@wl->scrub tree).
+ *
+ * Depending on the sub-state, wear-leveling entries of the used physical
+ * eraseblocks may be kept in one of those trees.
+ */
+struct ubi_wl_prot_entry {
+ struct rb_node rb_pnum;
+ struct rb_node rb_aec;
+ unsigned long long abs_ec;
+ struct ubi_wl_entry *e;
+};
+
+/**
+ * struct ubi_work - UBI work description data structure.
+ * @list: a link in the list of pending works
+ * @func: worker function
+ * @priv: private data of the worker function
+ *
+ * @e: physical eraseblock to erase
+ * @torture: if the physical eraseblock has to be tortured
+ *
+ * The @func pointer points to the worker function. If the @cancel argument is
+ * not zero, the worker has to free the resources and exit immediately. The
+ * worker has to return zero in case of success and a negative error code in
+ * case of failure.
+ */
+struct ubi_work {
+ struct list_head list;
+ int (*func)(struct ubi_device *ubi, struct ubi_work *wrk, int cancel);
+ /* The below fields are only relevant to erasure works */
+ struct ubi_wl_entry *e;
+ int torture;
+};
+
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
+static int paranoid_check_ec(struct ubi_device *ubi, int pnum, int ec);
+static int paranoid_check_in_wl_tree(struct ubi_wl_entry *e,
+ struct rb_root *root);
+#else
+#define paranoid_check_ec(ubi, pnum, ec) 0
+#define paranoid_check_in_wl_tree(e, root)
+#endif
+
+/**
+ * wl_tree_add - add a wear-leveling entry to a WL RB-tree.
+ * @e: the wear-leveling entry to add
+ * @root: the root of the tree
+ *
+ * Note, we use (erase counter, physical eraseblock number) pairs as keys in
+ * the @ubi->used and @ubi->free RB-trees.
+ */
+static void wl_tree_add(struct ubi_wl_entry *e, struct rb_root *root)
+{
+ struct rb_node **p, *parent = NULL;
+
+ p = &root->rb_node;
+ while (*p) {
+ struct ubi_wl_entry *e1;
+
+ parent = *p;
+ e1 = rb_entry(parent, struct ubi_wl_entry, rb);
+
+ if (e->ec < e1->ec)
+ p = &(*p)->rb_left;
+ else if (e->ec > e1->ec)
+ p = &(*p)->rb_right;
+ else {
+ ubi_assert(e->pnum != e1->pnum);
+ if (e->pnum < e1->pnum)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+ }
+
+ rb_link_node(&e->rb, parent, p);
+ rb_insert_color(&e->rb, root);
+}
+
+/**
+ * do_work - do one pending work.
+ * @ubi: UBI device description object
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int do_work(struct ubi_device *ubi)
+{
+ int err;
+ struct ubi_work *wrk;
+
+ cond_resched();
+
+ /*
+ * @ubi->work_sem is used to synchronize with the workers. Workers take
+ * it in read mode, so many of them may be doing works at a time. But
+ * the queue flush code has to be sure the whole queue of works is
+ * done, and it takes the mutex in write mode.
+ */
+ down_read(&ubi->work_sem);
+ spin_lock(&ubi->wl_lock);
+ if (list_empty(&ubi->works)) {
+ spin_unlock(&ubi->wl_lock);
+ up_read(&ubi->work_sem);
+ return 0;
+ }
+
+ wrk = list_entry(ubi->works.next, struct ubi_work, list);
+ list_del(&wrk->list);
+ ubi->works_count -= 1;
+ ubi_assert(ubi->works_count >= 0);
+ spin_unlock(&ubi->wl_lock);
+
+ /*
+ * Call the worker function. Do not touch the work structure
+ * after this call as it will have been freed or reused by that
+ * time by the worker function.
+ */
+ err = wrk->func(ubi, wrk, 0);
+ if (err)
+ ubi_err("work failed with error code %d", err);
+ up_read(&ubi->work_sem);
+
+ return err;
+}
+
+/**
+ * produce_free_peb - produce a free physical eraseblock.
+ * @ubi: UBI device description object
+ *
+ * This function tries to make a free PEB by means of synchronous execution of
+ * pending works. This may be needed if, for example the background thread is
+ * disabled. Returns zero in case of success and a negative error code in case
+ * of failure.
+ */
+static int produce_free_peb(struct ubi_device *ubi)
+{
+ int err;
+
+ spin_lock(&ubi->wl_lock);
+ while (!ubi->free.rb_node) {
+ spin_unlock(&ubi->wl_lock);
+
+ dbg_wl("do one work synchronously");
+ err = do_work(ubi);
+ if (err)
+ return err;
+
+ spin_lock(&ubi->wl_lock);
+ }
+ spin_unlock(&ubi->wl_lock);
+
+ return 0;
+}
+
+/**
+ * in_wl_tree - check if wear-leveling entry is present in a WL RB-tree.
+ * @e: the wear-leveling entry to check
+ * @root: the root of the tree
+ *
+ * This function returns non-zero if @e is in the @root RB-tree and zero if it
+ * is not.
+ */
+static int in_wl_tree(struct ubi_wl_entry *e, struct rb_root *root)
+{
+ struct rb_node *p;
+
+ p = root->rb_node;
+ while (p) {
+ struct ubi_wl_entry *e1;
+
+ e1 = rb_entry(p, struct ubi_wl_entry, rb);
+
+ if (e->pnum == e1->pnum) {
+ ubi_assert(e == e1);
+ return 1;
+ }
+
+ if (e->ec < e1->ec)
+ p = p->rb_left;
+ else if (e->ec > e1->ec)
+ p = p->rb_right;
+ else {
+ ubi_assert(e->pnum != e1->pnum);
+ if (e->pnum < e1->pnum)
+ p = p->rb_left;
+ else
+ p = p->rb_right;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * prot_tree_add - add physical eraseblock to protection trees.
+ * @ubi: UBI device description object
+ * @e: the physical eraseblock to add
+ * @pe: protection entry object to use
+ * @abs_ec: absolute erase counter value when this physical eraseblock has
+ * to be removed from the protection trees.
+ *
+ * @wl->lock has to be locked.
+ */
+static void prot_tree_add(struct ubi_device *ubi, struct ubi_wl_entry *e,
+ struct ubi_wl_prot_entry *pe, int abs_ec)
+{
+ struct rb_node **p, *parent = NULL;
+ struct ubi_wl_prot_entry *pe1;
+
+ pe->e = e;
+ pe->abs_ec = ubi->abs_ec + abs_ec;
+
+ p = &ubi->prot.pnum.rb_node;
+ while (*p) {
+ parent = *p;
+ pe1 = rb_entry(parent, struct ubi_wl_prot_entry, rb_pnum);
+
+ if (e->pnum < pe1->e->pnum)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+ rb_link_node(&pe->rb_pnum, parent, p);
+ rb_insert_color(&pe->rb_pnum, &ubi->prot.pnum);
+
+ p = &ubi->prot.aec.rb_node;
+ parent = NULL;
+ while (*p) {
+ parent = *p;
+ pe1 = rb_entry(parent, struct ubi_wl_prot_entry, rb_aec);
+
+ if (pe->abs_ec < pe1->abs_ec)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+ rb_link_node(&pe->rb_aec, parent, p);
+ rb_insert_color(&pe->rb_aec, &ubi->prot.aec);
+}
+
+/**
+ * find_wl_entry - find wear-leveling entry closest to certain erase counter.
+ * @root: the RB-tree where to look for
+ * @max: highest possible erase counter
+ *
+ * This function looks for a wear leveling entry with erase counter closest to
+ * @max and less then @max.
+ */
+static struct ubi_wl_entry *find_wl_entry(struct rb_root *root, int max)
+{
+ struct rb_node *p;
+ struct ubi_wl_entry *e;
+
+ e = rb_entry(rb_first(root), struct ubi_wl_entry, rb);
+ max += e->ec;
+
+ p = root->rb_node;
+ while (p) {
+ struct ubi_wl_entry *e1;
+
+ e1 = rb_entry(p, struct ubi_wl_entry, rb);
+ if (e1->ec >= max)
+ p = p->rb_left;
+ else {
+ p = p->rb_right;
+ e = e1;
+ }
+ }
+
+ return e;
+}
+
+/**
+ * ubi_wl_get_peb - get a physical eraseblock.
+ * @ubi: UBI device description object
+ * @dtype: type of data which will be stored in this physical eraseblock
+ *
+ * This function returns a physical eraseblock in case of success and a
+ * negative error code in case of failure. Might sleep.
+ */
+int ubi_wl_get_peb(struct ubi_device *ubi, int dtype)
+{
+ int err, protect, medium_ec;
+ struct ubi_wl_entry *e, *first, *last;
+ struct ubi_wl_prot_entry *pe;
+
+ ubi_assert(dtype == UBI_LONGTERM || dtype == UBI_SHORTTERM ||
+ dtype == UBI_UNKNOWN);
+
+ pe = kmalloc(sizeof(struct ubi_wl_prot_entry), GFP_NOFS);
+ if (!pe)
+ return -ENOMEM;
+
+retry:
+ spin_lock(&ubi->wl_lock);
+ if (!ubi->free.rb_node) {
+ if (ubi->works_count == 0) {
+ ubi_assert(list_empty(&ubi->works));
+ ubi_err("no free eraseblocks");
+ spin_unlock(&ubi->wl_lock);
+ kfree(pe);
+ return -ENOSPC;
+ }
+ spin_unlock(&ubi->wl_lock);
+
+ err = produce_free_peb(ubi);
+ if (err < 0) {
+ kfree(pe);
+ return err;
+ }
+ goto retry;
+ }
+
+ switch (dtype) {
+ case UBI_LONGTERM:
+ /*
+ * For long term data we pick a physical eraseblock
+ * with high erase counter. But the highest erase
+ * counter we can pick is bounded by the the lowest
+ * erase counter plus %WL_FREE_MAX_DIFF.
+ */
+ e = find_wl_entry(&ubi->free, WL_FREE_MAX_DIFF);
+ protect = LT_PROTECTION;
+ break;
+ case UBI_UNKNOWN:
+ /*
+ * For unknown data we pick a physical eraseblock with
+ * medium erase counter. But we by no means can pick a
+ * physical eraseblock with erase counter greater or
+ * equivalent than the lowest erase counter plus
+ * %WL_FREE_MAX_DIFF.
+ */
+ first = rb_entry(rb_first(&ubi->free),
+ struct ubi_wl_entry, rb);
+ last = rb_entry(rb_last(&ubi->free),
+ struct ubi_wl_entry, rb);
+
+ if (last->ec - first->ec < WL_FREE_MAX_DIFF)
+ e = rb_entry(ubi->free.rb_node,
+ struct ubi_wl_entry, rb);
+ else {
+ medium_ec = (first->ec + WL_FREE_MAX_DIFF)/2;
+ e = find_wl_entry(&ubi->free, medium_ec);
+ }
+ protect = U_PROTECTION;
+ break;
+ case UBI_SHORTTERM:
+ /*
+ * For short term data we pick a physical eraseblock
+ * with the lowest erase counter as we expect it will
+ * be erased soon.
+ */
+ e = rb_entry(rb_first(&ubi->free),
+ struct ubi_wl_entry, rb);
+ protect = ST_PROTECTION;
+ break;
+ default:
+ protect = 0;
+ e = NULL;
+ BUG();
+ }
+
+ /*
+ * Move the physical eraseblock to the protection trees where it will
+ * be protected from being moved for some time.
+ */
+ paranoid_check_in_wl_tree(e, &ubi->free);
+ rb_erase(&e->rb, &ubi->free);
+ prot_tree_add(ubi, e, pe, protect);
+
+ dbg_wl("PEB %d EC %d, protection %d", e->pnum, e->ec, protect);
+ spin_unlock(&ubi->wl_lock);
+
+ return e->pnum;
+}
+
+/**
+ * prot_tree_del - remove a physical eraseblock from the protection trees
+ * @ubi: UBI device description object
+ * @pnum: the physical eraseblock to remove
+ *
+ * This function returns PEB @pnum from the protection trees and returns zero
+ * in case of success and %-ENODEV if the PEB was not found in the protection
+ * trees.
+ */
+static int prot_tree_del(struct ubi_device *ubi, int pnum)
+{
+ struct rb_node *p;
+ struct ubi_wl_prot_entry *pe = NULL;
+
+ p = ubi->prot.pnum.rb_node;
+ while (p) {
+
+ pe = rb_entry(p, struct ubi_wl_prot_entry, rb_pnum);
+
+ if (pnum == pe->e->pnum)
+ goto found;
+
+ if (pnum < pe->e->pnum)
+ p = p->rb_left;
+ else
+ p = p->rb_right;
+ }
+
+ return -ENODEV;
+
+found:
+ ubi_assert(pe->e->pnum == pnum);
+ rb_erase(&pe->rb_aec, &ubi->prot.aec);
+ rb_erase(&pe->rb_pnum, &ubi->prot.pnum);
+ kfree(pe);
+ return 0;
+}
+
+/**
+ * sync_erase - synchronously erase a physical eraseblock.
+ * @ubi: UBI device description object
+ * @e: the the physical eraseblock to erase
+ * @torture: if the physical eraseblock has to be tortured
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int sync_erase(struct ubi_device *ubi, struct ubi_wl_entry *e, int torture)
+{
+ int err;
+ struct ubi_ec_hdr *ec_hdr;
+ unsigned long long ec = e->ec;
+
+ dbg_wl("erase PEB %d, old EC %llu", e->pnum, ec);
+
+ err = paranoid_check_ec(ubi, e->pnum, e->ec);
+ if (err > 0)
+ return -EINVAL;
+
+ ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_NOFS);
+ if (!ec_hdr)
+ return -ENOMEM;
+
+ err = ubi_io_sync_erase(ubi, e->pnum, torture);
+ if (err < 0)
+ goto out_free;
+
+ ec += err;
+ if (ec > UBI_MAX_ERASECOUNTER) {
+ /*
+ * Erase counter overflow. Upgrade UBI and use 64-bit
+ * erase counters internally.
+ */
+ ubi_err("erase counter overflow at PEB %d, EC %llu",
+ e->pnum, ec);
+ err = -EINVAL;
+ goto out_free;
+ }
+
+ dbg_wl("erased PEB %d, new EC %llu", e->pnum, ec);
+
+ ec_hdr->ec = cpu_to_be64(ec);
+
+ err = ubi_io_write_ec_hdr(ubi, e->pnum, ec_hdr);
+ if (err)
+ goto out_free;
+
+ e->ec = ec;
+ spin_lock(&ubi->wl_lock);
+ if (e->ec > ubi->max_ec)
+ ubi->max_ec = e->ec;
+ spin_unlock(&ubi->wl_lock);
+
+out_free:
+ kfree(ec_hdr);
+ return err;
+}
+
+/**
+ * check_protection_over - check if it is time to stop protecting some
+ * physical eraseblocks.
+ * @ubi: UBI device description object
+ *
+ * This function is called after each erase operation, when the absolute erase
+ * counter is incremented, to check if some physical eraseblock have not to be
+ * protected any longer. These physical eraseblocks are moved from the
+ * protection trees to the used tree.
+ */
+static void check_protection_over(struct ubi_device *ubi)
+{
+ struct ubi_wl_prot_entry *pe;
+
+ /*
+ * There may be several protected physical eraseblock to remove,
+ * process them all.
+ */
+ while (1) {
+ spin_lock(&ubi->wl_lock);
+ if (!ubi->prot.aec.rb_node) {
+ spin_unlock(&ubi->wl_lock);
+ break;
+ }
+
+ pe = rb_entry(rb_first(&ubi->prot.aec),
+ struct ubi_wl_prot_entry, rb_aec);
+
+ if (pe->abs_ec > ubi->abs_ec) {
+ spin_unlock(&ubi->wl_lock);
+ break;
+ }
+
+ dbg_wl("PEB %d protection over, abs_ec %llu, PEB abs_ec %llu",
+ pe->e->pnum, ubi->abs_ec, pe->abs_ec);
+ rb_erase(&pe->rb_aec, &ubi->prot.aec);
+ rb_erase(&pe->rb_pnum, &ubi->prot.pnum);
+ wl_tree_add(pe->e, &ubi->used);
+ spin_unlock(&ubi->wl_lock);
+
+ kfree(pe);
+ cond_resched();
+ }
+}
+
+/**
+ * schedule_ubi_work - schedule a work.
+ * @ubi: UBI device description object
+ * @wrk: the work to schedule
+ *
+ * This function enqueues a work defined by @wrk to the tail of the pending
+ * works list.
+ */
+static void schedule_ubi_work(struct ubi_device *ubi, struct ubi_work *wrk)
+{
+ spin_lock(&ubi->wl_lock);
+ list_add_tail(&wrk->list, &ubi->works);
+ ubi_assert(ubi->works_count >= 0);
+ ubi->works_count += 1;
+
+ /*
+ * U-Boot special: We have no bgt_thread in U-Boot!
+ * So just call do_work() here directly.
+ */
+ do_work(ubi);
+
+ spin_unlock(&ubi->wl_lock);
+}
+
+static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
+ int cancel);
+
+/**
+ * schedule_erase - schedule an erase work.
+ * @ubi: UBI device description object
+ * @e: the WL entry of the physical eraseblock to erase
+ * @torture: if the physical eraseblock has to be tortured
+ *
+ * This function returns zero in case of success and a %-ENOMEM in case of
+ * failure.
+ */
+static int schedule_erase(struct ubi_device *ubi, struct ubi_wl_entry *e,
+ int torture)
+{
+ struct ubi_work *wl_wrk;
+
+ dbg_wl("schedule erasure of PEB %d, EC %d, torture %d",
+ e->pnum, e->ec, torture);
+
+ wl_wrk = kmalloc(sizeof(struct ubi_work), GFP_NOFS);
+ if (!wl_wrk)
+ return -ENOMEM;
+
+ wl_wrk->func = &erase_worker;
+ wl_wrk->e = e;
+ wl_wrk->torture = torture;
+
+ schedule_ubi_work(ubi, wl_wrk);
+ return 0;
+}
+
+/**
+ * wear_leveling_worker - wear-leveling worker function.
+ * @ubi: UBI device description object
+ * @wrk: the work object
+ * @cancel: non-zero if the worker has to free memory and exit
+ *
+ * This function copies a more worn out physical eraseblock to a less worn out
+ * one. Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
+ int cancel)
+{
+ int err, put = 0, scrubbing = 0, protect = 0;
+ struct ubi_wl_prot_entry *uninitialized_var(pe);
+ struct ubi_wl_entry *e1, *e2;
+ struct ubi_vid_hdr *vid_hdr;
+
+ kfree(wrk);
+
+ if (cancel)
+ return 0;
+
+ vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
+ if (!vid_hdr)
+ return -ENOMEM;
+
+ mutex_lock(&ubi->move_mutex);
+ spin_lock(&ubi->wl_lock);
+ ubi_assert(!ubi->move_from && !ubi->move_to);
+ ubi_assert(!ubi->move_to_put);
+
+ if (!ubi->free.rb_node ||
+ (!ubi->used.rb_node && !ubi->scrub.rb_node)) {
+ /*
+ * No free physical eraseblocks? Well, they must be waiting in
+ * the queue to be erased. Cancel movement - it will be
+ * triggered again when a free physical eraseblock appears.
+ *
+ * No used physical eraseblocks? They must be temporarily
+ * protected from being moved. They will be moved to the
+ * @ubi->used tree later and the wear-leveling will be
+ * triggered again.
+ */
+ dbg_wl("cancel WL, a list is empty: free %d, used %d",
+ !ubi->free.rb_node, !ubi->used.rb_node);
+ goto out_cancel;
+ }
+
+ if (!ubi->scrub.rb_node) {
+ /*
+ * Now pick the least worn-out used physical eraseblock and a
+ * highly worn-out free physical eraseblock. If the erase
+ * counters differ much enough, start wear-leveling.
+ */
+ e1 = rb_entry(rb_first(&ubi->used), struct ubi_wl_entry, rb);
+ e2 = find_wl_entry(&ubi->free, WL_FREE_MAX_DIFF);
+
+ if (!(e2->ec - e1->ec >= UBI_WL_THRESHOLD)) {
+ dbg_wl("no WL needed: min used EC %d, max free EC %d",
+ e1->ec, e2->ec);
+ goto out_cancel;
+ }
+ paranoid_check_in_wl_tree(e1, &ubi->used);
+ rb_erase(&e1->rb, &ubi->used);
+ dbg_wl("move PEB %d EC %d to PEB %d EC %d",
+ e1->pnum, e1->ec, e2->pnum, e2->ec);
+ } else {
+ /* Perform scrubbing */
+ scrubbing = 1;
+ e1 = rb_entry(rb_first(&ubi->scrub), struct ubi_wl_entry, rb);
+ e2 = find_wl_entry(&ubi->free, WL_FREE_MAX_DIFF);
+ paranoid_check_in_wl_tree(e1, &ubi->scrub);
+ rb_erase(&e1->rb, &ubi->scrub);
+ dbg_wl("scrub PEB %d to PEB %d", e1->pnum, e2->pnum);
+ }
+
+ paranoid_check_in_wl_tree(e2, &ubi->free);
+ rb_erase(&e2->rb, &ubi->free);
+ ubi->move_from = e1;
+ ubi->move_to = e2;
+ spin_unlock(&ubi->wl_lock);
+
+ /*
+ * Now we are going to copy physical eraseblock @e1->pnum to @e2->pnum.
+ * We so far do not know which logical eraseblock our physical
+ * eraseblock (@e1) belongs to. We have to read the volume identifier
+ * header first.
+ *
+ * Note, we are protected from this PEB being unmapped and erased. The
+ * 'ubi_wl_put_peb()' would wait for moving to be finished if the PEB
+ * which is being moved was unmapped.
+ */
+
+ err = ubi_io_read_vid_hdr(ubi, e1->pnum, vid_hdr, 0);
+ if (err && err != UBI_IO_BITFLIPS) {
+ if (err == UBI_IO_PEB_FREE) {
+ /*
+ * We are trying to move PEB without a VID header. UBI
+ * always write VID headers shortly after the PEB was
+ * given, so we have a situation when it did not have
+ * chance to write it down because it was preempted.
+ * Just re-schedule the work, so that next time it will
+ * likely have the VID header in place.
+ */
+ dbg_wl("PEB %d has no VID header", e1->pnum);
+ goto out_not_moved;
+ }
+
+ ubi_err("error %d while reading VID header from PEB %d",
+ err, e1->pnum);
+ if (err > 0)
+ err = -EIO;
+ goto out_error;
+ }
+
+ err = ubi_eba_copy_leb(ubi, e1->pnum, e2->pnum, vid_hdr);
+ if (err) {
+
+ if (err < 0)
+ goto out_error;
+ if (err == 1)
+ goto out_not_moved;
+
+ /*
+ * For some reason the LEB was not moved - it might be because
+ * the volume is being deleted. We should prevent this PEB from
+ * being selected for wear-levelling movement for some "time",
+ * so put it to the protection tree.
+ */
+
+ dbg_wl("cancelled moving PEB %d", e1->pnum);
+ pe = kmalloc(sizeof(struct ubi_wl_prot_entry), GFP_NOFS);
+ if (!pe) {
+ err = -ENOMEM;
+ goto out_error;
+ }
+
+ protect = 1;
+ }
+
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ spin_lock(&ubi->wl_lock);
+ if (protect)
+ prot_tree_add(ubi, e1, pe, protect);
+ if (!ubi->move_to_put)
+ wl_tree_add(e2, &ubi->used);
+ else
+ put = 1;
+ ubi->move_from = ubi->move_to = NULL;
+ ubi->move_to_put = ubi->wl_scheduled = 0;
+ spin_unlock(&ubi->wl_lock);
+
+ if (put) {
+ /*
+ * Well, the target PEB was put meanwhile, schedule it for
+ * erasure.
+ */
+ dbg_wl("PEB %d was put meanwhile, erase", e2->pnum);
+ err = schedule_erase(ubi, e2, 0);
+ if (err)
+ goto out_error;
+ }
+
+ if (!protect) {
+ err = schedule_erase(ubi, e1, 0);
+ if (err)
+ goto out_error;
+ }
+
+
+ dbg_wl("done");
+ mutex_unlock(&ubi->move_mutex);
+ return 0;
+
+ /*
+ * For some reasons the LEB was not moved, might be an error, might be
+ * something else. @e1 was not changed, so return it back. @e2 might
+ * be changed, schedule it for erasure.
+ */
+out_not_moved:
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ spin_lock(&ubi->wl_lock);
+ if (scrubbing)
+ wl_tree_add(e1, &ubi->scrub);
+ else
+ wl_tree_add(e1, &ubi->used);
+ ubi->move_from = ubi->move_to = NULL;
+ ubi->move_to_put = ubi->wl_scheduled = 0;
+ spin_unlock(&ubi->wl_lock);
+
+ err = schedule_erase(ubi, e2, 0);
+ if (err)
+ goto out_error;
+
+ mutex_unlock(&ubi->move_mutex);
+ return 0;
+
+out_error:
+ ubi_err("error %d while moving PEB %d to PEB %d",
+ err, e1->pnum, e2->pnum);
+
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ spin_lock(&ubi->wl_lock);
+ ubi->move_from = ubi->move_to = NULL;
+ ubi->move_to_put = ubi->wl_scheduled = 0;
+ spin_unlock(&ubi->wl_lock);
+
+ kmem_cache_free(ubi_wl_entry_slab, e1);
+ kmem_cache_free(ubi_wl_entry_slab, e2);
+ ubi_ro_mode(ubi);
+
+ mutex_unlock(&ubi->move_mutex);
+ return err;
+
+out_cancel:
+ ubi->wl_scheduled = 0;
+ spin_unlock(&ubi->wl_lock);
+ mutex_unlock(&ubi->move_mutex);
+ ubi_free_vid_hdr(ubi, vid_hdr);
+ return 0;
+}
+
+/**
+ * ensure_wear_leveling - schedule wear-leveling if it is needed.
+ * @ubi: UBI device description object
+ *
+ * This function checks if it is time to start wear-leveling and schedules it
+ * if yes. This function returns zero in case of success and a negative error
+ * code in case of failure.
+ */
+static int ensure_wear_leveling(struct ubi_device *ubi)
+{
+ int err = 0;
+ struct ubi_wl_entry *e1;
+ struct ubi_wl_entry *e2;
+ struct ubi_work *wrk;
+
+ spin_lock(&ubi->wl_lock);
+ if (ubi->wl_scheduled)
+ /* Wear-leveling is already in the work queue */
+ goto out_unlock;
+
+ /*
+ * If the ubi->scrub tree is not empty, scrubbing is needed, and the
+ * the WL worker has to be scheduled anyway.
+ */
+ if (!ubi->scrub.rb_node) {
+ if (!ubi->used.rb_node || !ubi->free.rb_node)
+ /* No physical eraseblocks - no deal */
+ goto out_unlock;
+
+ /*
+ * We schedule wear-leveling only if the difference between the
+ * lowest erase counter of used physical eraseblocks and a high
+ * erase counter of free physical eraseblocks is greater then
+ * %UBI_WL_THRESHOLD.
+ */
+ e1 = rb_entry(rb_first(&ubi->used), struct ubi_wl_entry, rb);
+ e2 = find_wl_entry(&ubi->free, WL_FREE_MAX_DIFF);
+
+ if (!(e2->ec - e1->ec >= UBI_WL_THRESHOLD))
+ goto out_unlock;
+ dbg_wl("schedule wear-leveling");
+ } else
+ dbg_wl("schedule scrubbing");
+
+ ubi->wl_scheduled = 1;
+ spin_unlock(&ubi->wl_lock);
+
+ wrk = kmalloc(sizeof(struct ubi_work), GFP_NOFS);
+ if (!wrk) {
+ err = -ENOMEM;
+ goto out_cancel;
+ }
+
+ wrk->func = &wear_leveling_worker;
+ schedule_ubi_work(ubi, wrk);
+ return err;
+
+out_cancel:
+ spin_lock(&ubi->wl_lock);
+ ubi->wl_scheduled = 0;
+out_unlock:
+ spin_unlock(&ubi->wl_lock);
+ return err;
+}
+
+/**
+ * erase_worker - physical eraseblock erase worker function.
+ * @ubi: UBI device description object
+ * @wl_wrk: the work object
+ * @cancel: non-zero if the worker has to free memory and exit
+ *
+ * This function erases a physical eraseblock and perform torture testing if
+ * needed. It also takes care about marking the physical eraseblock bad if
+ * needed. Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
+ int cancel)
+{
+ struct ubi_wl_entry *e = wl_wrk->e;
+ int pnum = e->pnum, err, need;
+
+ if (cancel) {
+ dbg_wl("cancel erasure of PEB %d EC %d", pnum, e->ec);
+ kfree(wl_wrk);
+ kmem_cache_free(ubi_wl_entry_slab, e);
+ return 0;
+ }
+
+ dbg_wl("erase PEB %d EC %d", pnum, e->ec);
+
+ err = sync_erase(ubi, e, wl_wrk->torture);
+ if (!err) {
+ /* Fine, we've erased it successfully */
+ kfree(wl_wrk);
+
+ spin_lock(&ubi->wl_lock);
+ ubi->abs_ec += 1;
+ wl_tree_add(e, &ubi->free);
+ spin_unlock(&ubi->wl_lock);
+
+ /*
+ * One more erase operation has happened, take care about protected
+ * physical eraseblocks.
+ */
+ check_protection_over(ubi);
+
+ /* And take care about wear-leveling */
+ err = ensure_wear_leveling(ubi);
+ return err;
+ }
+
+ ubi_err("failed to erase PEB %d, error %d", pnum, err);
+ kfree(wl_wrk);
+ kmem_cache_free(ubi_wl_entry_slab, e);
+
+ if (err == -EINTR || err == -ENOMEM || err == -EAGAIN ||
+ err == -EBUSY) {
+ int err1;
+
+ /* Re-schedule the LEB for erasure */
+ err1 = schedule_erase(ubi, e, 0);
+ if (err1) {
+ err = err1;
+ goto out_ro;
+ }
+ return err;
+ } else if (err != -EIO) {
+ /*
+ * If this is not %-EIO, we have no idea what to do. Scheduling
+ * this physical eraseblock for erasure again would cause
+ * errors again and again. Well, lets switch to RO mode.
+ */
+ goto out_ro;
+ }
+
+ /* It is %-EIO, the PEB went bad */
+
+ if (!ubi->bad_allowed) {
+ ubi_err("bad physical eraseblock %d detected", pnum);
+ goto out_ro;
+ }
+
+ spin_lock(&ubi->volumes_lock);
+ need = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs + 1;
+ if (need > 0) {
+ need = ubi->avail_pebs >= need ? need : ubi->avail_pebs;
+ ubi->avail_pebs -= need;
+ ubi->rsvd_pebs += need;
+ ubi->beb_rsvd_pebs += need;
+ if (need > 0)
+ ubi_msg("reserve more %d PEBs", need);
+ }
+
+ if (ubi->beb_rsvd_pebs == 0) {
+ spin_unlock(&ubi->volumes_lock);
+ ubi_err("no reserved physical eraseblocks");
+ goto out_ro;
+ }
+
+ spin_unlock(&ubi->volumes_lock);
+ ubi_msg("mark PEB %d as bad", pnum);
+
+ err = ubi_io_mark_bad(ubi, pnum);
+ if (err)
+ goto out_ro;
+
+ spin_lock(&ubi->volumes_lock);
+ ubi->beb_rsvd_pebs -= 1;
+ ubi->bad_peb_count += 1;
+ ubi->good_peb_count -= 1;
+ ubi_calculate_reserved(ubi);
+ if (ubi->beb_rsvd_pebs == 0)
+ ubi_warn("last PEB from the reserved pool was used");
+ spin_unlock(&ubi->volumes_lock);
+
+ return err;
+
+out_ro:
+ ubi_ro_mode(ubi);
+ return err;
+}
+
+/**
+ * ubi_wl_put_peb - return a physical eraseblock to the wear-leveling unit.
+ * @ubi: UBI device description object
+ * @pnum: physical eraseblock to return
+ * @torture: if this physical eraseblock has to be tortured
+ *
+ * This function is called to return physical eraseblock @pnum to the pool of
+ * free physical eraseblocks. The @torture flag has to be set if an I/O error
+ * occurred to this @pnum and it has to be tested. This function returns zero
+ * in case of success, and a negative error code in case of failure.
+ */
+int ubi_wl_put_peb(struct ubi_device *ubi, int pnum, int torture)
+{
+ int err;
+ struct ubi_wl_entry *e;
+
+ dbg_wl("PEB %d", pnum);
+ ubi_assert(pnum >= 0);
+ ubi_assert(pnum < ubi->peb_count);
+
+retry:
+ spin_lock(&ubi->wl_lock);
+ e = ubi->lookuptbl[pnum];
+ if (e == ubi->move_from) {
+ /*
+ * User is putting the physical eraseblock which was selected to
+ * be moved. It will be scheduled for erasure in the
+ * wear-leveling worker.
+ */
+ dbg_wl("PEB %d is being moved, wait", pnum);
+ spin_unlock(&ubi->wl_lock);
+
+ /* Wait for the WL worker by taking the @ubi->move_mutex */
+ mutex_lock(&ubi->move_mutex);
+ mutex_unlock(&ubi->move_mutex);
+ goto retry;
+ } else if (e == ubi->move_to) {
+ /*
+ * User is putting the physical eraseblock which was selected
+ * as the target the data is moved to. It may happen if the EBA
+ * unit already re-mapped the LEB in 'ubi_eba_copy_leb()' but
+ * the WL unit has not put the PEB to the "used" tree yet, but
+ * it is about to do this. So we just set a flag which will
+ * tell the WL worker that the PEB is not needed anymore and
+ * should be scheduled for erasure.
+ */
+ dbg_wl("PEB %d is the target of data moving", pnum);
+ ubi_assert(!ubi->move_to_put);
+ ubi->move_to_put = 1;
+ spin_unlock(&ubi->wl_lock);
+ return 0;
+ } else {
+ if (in_wl_tree(e, &ubi->used)) {
+ paranoid_check_in_wl_tree(e, &ubi->used);
+ rb_erase(&e->rb, &ubi->used);
+ } else if (in_wl_tree(e, &ubi->scrub)) {
+ paranoid_check_in_wl_tree(e, &ubi->scrub);
+ rb_erase(&e->rb, &ubi->scrub);
+ } else {
+ err = prot_tree_del(ubi, e->pnum);
+ if (err) {
+ ubi_err("PEB %d not found", pnum);
+ ubi_ro_mode(ubi);
+ spin_unlock(&ubi->wl_lock);
+ return err;
+ }
+ }
+ }
+ spin_unlock(&ubi->wl_lock);
+
+ err = schedule_erase(ubi, e, torture);
+ if (err) {
+ spin_lock(&ubi->wl_lock);
+ wl_tree_add(e, &ubi->used);
+ spin_unlock(&ubi->wl_lock);
+ }
+
+ return err;
+}
+
+/**
+ * ubi_wl_scrub_peb - schedule a physical eraseblock for scrubbing.
+ * @ubi: UBI device description object
+ * @pnum: the physical eraseblock to schedule
+ *
+ * If a bit-flip in a physical eraseblock is detected, this physical eraseblock
+ * needs scrubbing. This function schedules a physical eraseblock for
+ * scrubbing which is done in background. This function returns zero in case of
+ * success and a negative error code in case of failure.
+ */
+int ubi_wl_scrub_peb(struct ubi_device *ubi, int pnum)
+{
+ struct ubi_wl_entry *e;
+
+ ubi_msg("schedule PEB %d for scrubbing", pnum);
+
+retry:
+ spin_lock(&ubi->wl_lock);
+ e = ubi->lookuptbl[pnum];
+ if (e == ubi->move_from || in_wl_tree(e, &ubi->scrub)) {
+ spin_unlock(&ubi->wl_lock);
+ return 0;
+ }
+
+ if (e == ubi->move_to) {
+ /*
+ * This physical eraseblock was used to move data to. The data
+ * was moved but the PEB was not yet inserted to the proper
+ * tree. We should just wait a little and let the WL worker
+ * proceed.
+ */
+ spin_unlock(&ubi->wl_lock);
+ dbg_wl("the PEB %d is not in proper tree, retry", pnum);
+ yield();
+ goto retry;
+ }
+
+ if (in_wl_tree(e, &ubi->used)) {
+ paranoid_check_in_wl_tree(e, &ubi->used);
+ rb_erase(&e->rb, &ubi->used);
+ } else {
+ int err;
+
+ err = prot_tree_del(ubi, e->pnum);
+ if (err) {
+ ubi_err("PEB %d not found", pnum);
+ ubi_ro_mode(ubi);
+ spin_unlock(&ubi->wl_lock);
+ return err;
+ }
+ }
+
+ wl_tree_add(e, &ubi->scrub);
+ spin_unlock(&ubi->wl_lock);
+
+ /*
+ * Technically scrubbing is the same as wear-leveling, so it is done
+ * by the WL worker.
+ */
+ return ensure_wear_leveling(ubi);
+}
+
+/**
+ * ubi_wl_flush - flush all pending works.
+ * @ubi: UBI device description object
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+int ubi_wl_flush(struct ubi_device *ubi)
+{
+ int err;
+
+ /*
+ * Erase while the pending works queue is not empty, but not more then
+ * the number of currently pending works.
+ */
+ dbg_wl("flush (%d pending works)", ubi->works_count);
+ while (ubi->works_count) {
+ err = do_work(ubi);
+ if (err)
+ return err;
+ }
+
+ /*
+ * Make sure all the works which have been done in parallel are
+ * finished.
+ */
+ down_write(&ubi->work_sem);
+ up_write(&ubi->work_sem);
+
+ /*
+ * And in case last was the WL worker and it cancelled the LEB
+ * movement, flush again.
+ */
+ while (ubi->works_count) {
+ dbg_wl("flush more (%d pending works)", ubi->works_count);
+ err = do_work(ubi);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+/**
+ * tree_destroy - destroy an RB-tree.
+ * @root: the root of the tree to destroy
+ */
+static void tree_destroy(struct rb_root *root)
+{
+ struct rb_node *rb;
+ struct ubi_wl_entry *e;
+
+ rb = root->rb_node;
+ while (rb) {
+ if (rb->rb_left)
+ rb = rb->rb_left;
+ else if (rb->rb_right)
+ rb = rb->rb_right;
+ else {
+ e = rb_entry(rb, struct ubi_wl_entry, rb);
+
+ rb = rb_parent(rb);
+ if (rb) {
+ if (rb->rb_left == &e->rb)
+ rb->rb_left = NULL;
+ else
+ rb->rb_right = NULL;
+ }
+
+ kmem_cache_free(ubi_wl_entry_slab, e);
+ }
+ }
+}
+
+/**
+ * ubi_thread - UBI background thread.
+ * @u: the UBI device description object pointer
+ */
+int ubi_thread(void *u)
+{
+ int failures = 0;
+ struct ubi_device *ubi = u;
+
+ ubi_msg("background thread \"%s\" started, PID %d",
+ ubi->bgt_name, task_pid_nr(current));
+
+ set_freezable();
+ for (;;) {
+ int err;
+
+ if (kthread_should_stop())
+ break;
+
+ if (try_to_freeze())
+ continue;
+
+ spin_lock(&ubi->wl_lock);
+ if (list_empty(&ubi->works) || ubi->ro_mode ||
+ !ubi->thread_enabled) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock(&ubi->wl_lock);
+ schedule();
+ continue;
+ }
+ spin_unlock(&ubi->wl_lock);
+
+ err = do_work(ubi);
+ if (err) {
+ ubi_err("%s: work failed with error code %d",
+ ubi->bgt_name, err);
+ if (failures++ > WL_MAX_FAILURES) {
+ /*
+ * Too many failures, disable the thread and
+ * switch to read-only mode.
+ */
+ ubi_msg("%s: %d consecutive failures",
+ ubi->bgt_name, WL_MAX_FAILURES);
+ ubi_ro_mode(ubi);
+ break;
+ }
+ } else
+ failures = 0;
+
+ cond_resched();
+ }
+
+ dbg_wl("background thread \"%s\" is killed", ubi->bgt_name);
+ return 0;
+}
+
+/**
+ * cancel_pending - cancel all pending works.
+ * @ubi: UBI device description object
+ */
+static void cancel_pending(struct ubi_device *ubi)
+{
+ while (!list_empty(&ubi->works)) {
+ struct ubi_work *wrk;
+
+ wrk = list_entry(ubi->works.next, struct ubi_work, list);
+ list_del(&wrk->list);
+ wrk->func(ubi, wrk, 1);
+ ubi->works_count -= 1;
+ ubi_assert(ubi->works_count >= 0);
+ }
+}
+
+/**
+ * ubi_wl_init_scan - initialize the wear-leveling unit using scanning
+ * information.
+ * @ubi: UBI device description object
+ * @si: scanning information
+ *
+ * This function returns zero in case of success, and a negative error code in
+ * case of failure.
+ */
+int ubi_wl_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si)
+{
+ int err;
+ struct rb_node *rb1, *rb2;
+ struct ubi_scan_volume *sv;
+ struct ubi_scan_leb *seb, *tmp;
+ struct ubi_wl_entry *e;
+
+
+ ubi->used = ubi->free = ubi->scrub = RB_ROOT;
+ ubi->prot.pnum = ubi->prot.aec = RB_ROOT;
+ spin_lock_init(&ubi->wl_lock);
+ mutex_init(&ubi->move_mutex);
+ init_rwsem(&ubi->work_sem);
+ ubi->max_ec = si->max_ec;
+ INIT_LIST_HEAD(&ubi->works);
+
+ sprintf(ubi->bgt_name, UBI_BGT_NAME_PATTERN, ubi->ubi_num);
+
+ err = -ENOMEM;
+ ubi->lookuptbl = kzalloc(ubi->peb_count * sizeof(void *), GFP_KERNEL);
+ if (!ubi->lookuptbl)
+ return err;
+
+ list_for_each_entry_safe(seb, tmp, &si->erase, u.list) {
+ cond_resched();
+
+ e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
+ if (!e)
+ goto out_free;
+
+ e->pnum = seb->pnum;
+ e->ec = seb->ec;
+ ubi->lookuptbl[e->pnum] = e;
+ if (schedule_erase(ubi, e, 0)) {
+ kmem_cache_free(ubi_wl_entry_slab, e);
+ goto out_free;
+ }
+ }
+
+ list_for_each_entry(seb, &si->free, u.list) {
+ cond_resched();
+
+ e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
+ if (!e)
+ goto out_free;
+
+ e->pnum = seb->pnum;
+ e->ec = seb->ec;
+ ubi_assert(e->ec >= 0);
+ wl_tree_add(e, &ubi->free);
+ ubi->lookuptbl[e->pnum] = e;
+ }
+
+ list_for_each_entry(seb, &si->corr, u.list) {
+ cond_resched();
+
+ e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
+ if (!e)
+ goto out_free;
+
+ e->pnum = seb->pnum;
+ e->ec = seb->ec;
+ ubi->lookuptbl[e->pnum] = e;
+ if (schedule_erase(ubi, e, 0)) {
+ kmem_cache_free(ubi_wl_entry_slab, e);
+ goto out_free;
+ }
+ }
+
+ ubi_rb_for_each_entry(rb1, sv, &si->volumes, rb) {
+ ubi_rb_for_each_entry(rb2, seb, &sv->root, u.rb) {
+ cond_resched();
+
+ e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
+ if (!e)
+ goto out_free;
+
+ e->pnum = seb->pnum;
+ e->ec = seb->ec;
+ ubi->lookuptbl[e->pnum] = e;
+ if (!seb->scrub) {
+ dbg_wl("add PEB %d EC %d to the used tree",
+ e->pnum, e->ec);
+ wl_tree_add(e, &ubi->used);
+ } else {
+ dbg_wl("add PEB %d EC %d to the scrub tree",
+ e->pnum, e->ec);
+ wl_tree_add(e, &ubi->scrub);
+ }
+ }
+ }
+
+ if (ubi->avail_pebs < WL_RESERVED_PEBS) {
+ ubi_err("no enough physical eraseblocks (%d, need %d)",
+ ubi->avail_pebs, WL_RESERVED_PEBS);
+ goto out_free;
+ }
+ ubi->avail_pebs -= WL_RESERVED_PEBS;
+ ubi->rsvd_pebs += WL_RESERVED_PEBS;
+
+ /* Schedule wear-leveling if needed */
+ err = ensure_wear_leveling(ubi);
+ if (err)
+ goto out_free;
+
+ return 0;
+
+out_free:
+ cancel_pending(ubi);
+ tree_destroy(&ubi->used);
+ tree_destroy(&ubi->free);
+ tree_destroy(&ubi->scrub);
+ kfree(ubi->lookuptbl);
+ return err;
+}
+
+/**
+ * protection_trees_destroy - destroy the protection RB-trees.
+ * @ubi: UBI device description object
+ */
+static void protection_trees_destroy(struct ubi_device *ubi)
+{
+ struct rb_node *rb;
+ struct ubi_wl_prot_entry *pe;
+
+ rb = ubi->prot.aec.rb_node;
+ while (rb) {
+ if (rb->rb_left)
+ rb = rb->rb_left;
+ else if (rb->rb_right)
+ rb = rb->rb_right;
+ else {
+ pe = rb_entry(rb, struct ubi_wl_prot_entry, rb_aec);
+
+ rb = rb_parent(rb);
+ if (rb) {
+ if (rb->rb_left == &pe->rb_aec)
+ rb->rb_left = NULL;
+ else
+ rb->rb_right = NULL;
+ }
+
+ kmem_cache_free(ubi_wl_entry_slab, pe->e);
+ kfree(pe);
+ }
+ }
+}
+
+/**
+ * ubi_wl_close - close the wear-leveling unit.
+ * @ubi: UBI device description object
+ */
+void ubi_wl_close(struct ubi_device *ubi)
+{
+ dbg_wl("close the UBI wear-leveling unit");
+
+ cancel_pending(ubi);
+ protection_trees_destroy(ubi);
+ tree_destroy(&ubi->used);
+ tree_destroy(&ubi->free);
+ tree_destroy(&ubi->scrub);
+ kfree(ubi->lookuptbl);
+}
+
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
+
+/**
+ * paranoid_check_ec - make sure that the erase counter of a physical eraseblock
+ * is correct.
+ * @ubi: UBI device description object
+ * @pnum: the physical eraseblock number to check
+ * @ec: the erase counter to check
+ *
+ * This function returns zero if the erase counter of physical eraseblock @pnum
+ * is equivalent to @ec, %1 if not, and a negative error code if an error
+ * occurred.
+ */
+static int paranoid_check_ec(struct ubi_device *ubi, int pnum, int ec)
+{
+ int err;
+ long long read_ec;
+ struct ubi_ec_hdr *ec_hdr;
+
+ ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_NOFS);
+ if (!ec_hdr)
+ return -ENOMEM;
+
+ err = ubi_io_read_ec_hdr(ubi, pnum, ec_hdr, 0);
+ if (err && err != UBI_IO_BITFLIPS) {
+ /* The header does not have to exist */
+ err = 0;
+ goto out_free;
+ }
+
+ read_ec = be64_to_cpu(ec_hdr->ec);
+ if (ec != read_ec) {
+ ubi_err("paranoid check failed for PEB %d", pnum);
+ ubi_err("read EC is %lld, should be %d", read_ec, ec);
+ ubi_dbg_dump_stack();
+ err = 1;
+ } else
+ err = 0;
+
+out_free:
+ kfree(ec_hdr);
+ return err;
+}
+
+/**
+ * paranoid_check_in_wl_tree - make sure that a wear-leveling entry is present
+ * in a WL RB-tree.
+ * @e: the wear-leveling entry to check
+ * @root: the root of the tree
+ *
+ * This function returns zero if @e is in the @root RB-tree and %1 if it
+ * is not.
+ */
+static int paranoid_check_in_wl_tree(struct ubi_wl_entry *e,
+ struct rb_root *root)
+{
+ if (in_wl_tree(e, root))
+ return 0;
+
+ ubi_err("paranoid check failed for PEB %d, EC %d, RB-tree %p ",
+ e->pnum, e->ec, root);
+ ubi_dbg_dump_stack();
+ return 1;
+}
+
+#endif /* CONFIG_MTD_UBI_DEBUG_PARANOID */
diff --git a/include/linux/mtd/ubi.h b/include/linux/mtd/ubi.h
new file mode 100644
index 0000000..2f1db31
--- /dev/null
+++ b/include/linux/mtd/ubi.h
@@ -0,0 +1,186 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+#ifndef __LINUX_UBI_H__
+#define __LINUX_UBI_H__
+
+/* #include <asm/ioctl.h> */
+#include <linux/types.h>
+#include <mtd/ubi-user.h>
+
+/*
+ * enum ubi_open_mode - UBI volume open mode constants.
+ *
+ * UBI_READONLY: read-only mode
+ * UBI_READWRITE: read-write mode
+ * UBI_EXCLUSIVE: exclusive mode
+ */
+enum {
+ UBI_READONLY = 1,
+ UBI_READWRITE,
+ UBI_EXCLUSIVE
+};
+
+/**
+ * struct ubi_volume_info - UBI volume description data structure.
+ * @vol_id: volume ID
+ * @ubi_num: UBI device number this volume belongs to
+ * @size: how many physical eraseblocks are reserved for this volume
+ * @used_bytes: how many bytes of data this volume contains
+ * @used_ebs: how many physical eraseblocks of this volume actually contain any
+ * data
+ * @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
+ * @corrupted: non-zero if the volume is corrupted (static volumes only)
+ * @upd_marker: non-zero if the volume has update marker set
+ * @alignment: volume alignment
+ * @usable_leb_size: how many bytes are available in logical eraseblocks of
+ * this volume
+ * @name_len: volume name length
+ * @name: volume name
+ * @cdev: UBI volume character device major and minor numbers
+ *
+ * The @corrupted flag is only relevant to static volumes and is always zero
+ * for dynamic ones. This is because UBI does not care about dynamic volume
+ * data protection and only cares about protecting static volume data.
+ *
+ * The @upd_marker flag is set if the volume update operation was interrupted.
+ * Before touching the volume data during the update operation, UBI first sets
+ * the update marker flag for this volume. If the volume update operation was
+ * further interrupted, the update marker indicates this. If the update marker
+ * is set, the contents of the volume is certainly damaged and a new volume
+ * update operation has to be started.
+ *
+ * To put it differently, @corrupted and @upd_marker fields have different
+ * semantics:
+ * o the @corrupted flag means that this static volume is corrupted for some
+ * reasons, but not because an interrupted volume update
+ * o the @upd_marker field means that the volume is damaged because of an
+ * interrupted update operation.
+ *
+ * I.e., the @corrupted flag is never set if the @upd_marker flag is set.
+ *
+ * The @used_bytes and @used_ebs fields are only really needed for static
+ * volumes and contain the number of bytes stored in this static volume and how
+ * many eraseblock this data occupies. In case of dynamic volumes, the
+ * @used_bytes field is equivalent to @size*@usable_leb_size, and the @used_ebs
+ * field is equivalent to @size.
+ *
+ * In general, logical eraseblock size is a property of the UBI device, not
+ * of the UBI volume. Indeed, the logical eraseblock size depends on the
+ * physical eraseblock size and on how much bytes UBI headers consume. But
+ * because of the volume alignment (@alignment), the usable size of logical
+ * eraseblocks if a volume may be less. The following equation is true:
+ * @usable_leb_size = LEB size - (LEB size mod @alignment),
+ * where LEB size is the logical eraseblock size defined by the UBI device.
+ *
+ * The alignment is multiple to the minimal flash input/output unit size or %1
+ * if all the available space is used.
+ *
+ * To put this differently, alignment may be considered is a way to change
+ * volume logical eraseblock sizes.
+ */
+struct ubi_volume_info {
+ int ubi_num;
+ int vol_id;
+ int size;
+ long long used_bytes;
+ int used_ebs;
+ int vol_type;
+ int corrupted;
+ int upd_marker;
+ int alignment;
+ int usable_leb_size;
+ int name_len;
+ const char *name;
+ struct cdev *cdev;
+};
+
+/**
+ * struct ubi_device_info - UBI device description data structure.
+ * @ubi_num: ubi device number
+ * @leb_size: logical eraseblock size on this UBI device
+ * @min_io_size: minimal I/O unit size
+ * @ro_mode: if this device is in read-only mode
+ * @cdev: UBI character device major and minor numbers
+ *
+ * Note, @leb_size is the logical eraseblock size offered by the UBI device.
+ * Volumes of this UBI device may have smaller logical eraseblock size if their
+ * alignment is not equivalent to %1.
+ */
+struct ubi_device_info {
+ int ubi_num;
+ int leb_size;
+ int min_io_size;
+ int ro_mode;
+ struct cdev *cdev;
+};
+
+/* UBI descriptor given to users when they open UBI volumes */
+struct ubi_volume_desc;
+
+int ubi_get_device_info(int ubi_num, struct ubi_device_info *di);
+void ubi_get_volume_info(struct ubi_volume_desc *desc,
+ struct ubi_volume_info *vi);
+struct ubi_volume_desc *ubi_open_volume(int ubi_num, int vol_id, int mode);
+struct ubi_volume_desc *ubi_open_volume_nm(int ubi_num, const char *name,
+ int mode);
+void ubi_close_volume(struct ubi_volume_desc *desc);
+int ubi_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
+ int len, int check);
+int ubi_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
+ int offset, int len, int dtype);
+int ubi_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
+ int len, int dtype);
+int ubi_leb_erase(struct ubi_volume_desc *desc, int lnum);
+int ubi_leb_unmap(struct ubi_volume_desc *desc, int lnum);
+int ubi_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype);
+int ubi_is_mapped(struct ubi_volume_desc *desc, int lnum);
+
+/*
+ * This function is the same as the 'ubi_leb_read()' function, but it does not
+ * provide the checking capability.
+ */
+static inline int ubi_read(struct ubi_volume_desc *desc, int lnum, char *buf,
+ int offset, int len)
+{
+ return ubi_leb_read(desc, lnum, buf, offset, len, 0);
+}
+
+/*
+ * This function is the same as the 'ubi_leb_write()' functions, but it does
+ * not have the data type argument.
+ */
+static inline int ubi_write(struct ubi_volume_desc *desc, int lnum,
+ const void *buf, int offset, int len)
+{
+ return ubi_leb_write(desc, lnum, buf, offset, len, UBI_UNKNOWN);
+}
+
+/*
+ * This function is the same as the 'ubi_leb_change()' functions, but it does
+ * not have the data type argument.
+ */
+static inline int ubi_change(struct ubi_volume_desc *desc, int lnum,
+ const void *buf, int len)
+{
+ return ubi_leb_change(desc, lnum, buf, len, UBI_UNKNOWN);
+}
+
+#endif /* !__LINUX_UBI_H__ */
diff --git a/include/mtd/ubi-user.h b/include/mtd/ubi-user.h
new file mode 100644
index 0000000..a7421f1
--- /dev/null
+++ b/include/mtd/ubi-user.h
@@ -0,0 +1,268 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (���������������� ����������)
+ */
+
+#ifndef __UBI_USER_H__
+#define __UBI_USER_H__
+
+/*
+ * UBI device creation (the same as MTD device attachment)
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * MTD devices may be attached using %UBI_IOCATT ioctl command of the UBI
+ * control device. The caller has to properly fill and pass
+ * &struct ubi_attach_req object - UBI will attach the MTD device specified in
+ * the request and return the newly created UBI device number as the ioctl
+ * return value.
+ *
+ * UBI device deletion (the same as MTD device detachment)
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * An UBI device maybe deleted with %UBI_IOCDET ioctl command of the UBI
+ * control device.
+ *
+ * UBI volume creation
+ * ~~~~~~~~~~~~~~~~~~~
+ *
+ * UBI volumes are created via the %UBI_IOCMKVOL IOCTL command of UBI character
+ * device. A &struct ubi_mkvol_req object has to be properly filled and a
+ * pointer to it has to be passed to the IOCTL.
+ *
+ * UBI volume deletion
+ * ~~~~~~~~~~~~~~~~~~~
+ *
+ * To delete a volume, the %UBI_IOCRMVOL IOCTL command of the UBI character
+ * device should be used. A pointer to the 32-bit volume ID hast to be passed
+ * to the IOCTL.
+ *
+ * UBI volume re-size
+ * ~~~~~~~~~~~~~~~~~~
+ *
+ * To re-size a volume, the %UBI_IOCRSVOL IOCTL command of the UBI character
+ * device should be used. A &struct ubi_rsvol_req object has to be properly
+ * filled and a pointer to it has to be passed to the IOCTL.
+ *
+ * UBI volume update
+ * ~~~~~~~~~~~~~~~~~
+ *
+ * Volume update should be done via the %UBI_IOCVOLUP IOCTL command of the
+ * corresponding UBI volume character device. A pointer to a 64-bit update
+ * size should be passed to the IOCTL. After this, UBI expects user to write
+ * this number of bytes to the volume character device. The update is finished
+ * when the claimed number of bytes is passed. So, the volume update sequence
+ * is something like:
+ *
+ * fd = open("/dev/my_volume");
+ * ioctl(fd, UBI_IOCVOLUP, &image_size);
+ * write(fd, buf, image_size);
+ * close(fd);
+ *
+ * Atomic eraseblock change
+ * ~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * Atomic eraseblock change operation is done via the %UBI_IOCEBCH IOCTL
+ * command of the corresponding UBI volume character device. A pointer to
+ * &struct ubi_leb_change_req has to be passed to the IOCTL. Then the user is
+ * expected to write the requested amount of bytes. This is similar to the
+ * "volume update" IOCTL.
+ */
+
+/*
+ * When a new UBI volume or UBI device is created, users may either specify the
+ * volume/device number they want to create or to let UBI automatically assign
+ * the number using these constants.
+ */
+#define UBI_VOL_NUM_AUTO (-1)
+#define UBI_DEV_NUM_AUTO (-1)
+
+/* Maximum volume name length */
+#define UBI_MAX_VOLUME_NAME 127
+
+/* IOCTL commands of UBI character devices */
+
+#define UBI_IOC_MAGIC 'o'
+
+/* Create an UBI volume */
+#define UBI_IOCMKVOL _IOW(UBI_IOC_MAGIC, 0, struct ubi_mkvol_req)
+/* Remove an UBI volume */
+#define UBI_IOCRMVOL _IOW(UBI_IOC_MAGIC, 1, int32_t)
+/* Re-size an UBI volume */
+#define UBI_IOCRSVOL _IOW(UBI_IOC_MAGIC, 2, struct ubi_rsvol_req)
+
+/* IOCTL commands of the UBI control character device */
+
+#define UBI_CTRL_IOC_MAGIC 'o'
+
+/* Attach an MTD device */
+#define UBI_IOCATT _IOW(UBI_CTRL_IOC_MAGIC, 64, struct ubi_attach_req)
+/* Detach an MTD device */
+#define UBI_IOCDET _IOW(UBI_CTRL_IOC_MAGIC, 65, int32_t)
+
+/* IOCTL commands of UBI volume character devices */
+
+#define UBI_VOL_IOC_MAGIC 'O'
+
+/* Start UBI volume update */
+#define UBI_IOCVOLUP _IOW(UBI_VOL_IOC_MAGIC, 0, int64_t)
+/* An eraseblock erasure command, used for debugging, disabled by default */
+#define UBI_IOCEBER _IOW(UBI_VOL_IOC_MAGIC, 1, int32_t)
+/* An atomic eraseblock change command */
+#define UBI_IOCEBCH _IOW(UBI_VOL_IOC_MAGIC, 2, int32_t)
+
+/* Maximum MTD device name length supported by UBI */
+#define MAX_UBI_MTD_NAME_LEN 127
+
+/*
+ * UBI data type hint constants.
+ *
+ * UBI_LONGTERM: long-term data
+ * UBI_SHORTTERM: short-term data
+ * UBI_UNKNOWN: data persistence is unknown
+ *
+ * These constants are used when data is written to UBI volumes in order to
+ * help the UBI wear-leveling unit to find more appropriate physical
+ * eraseblocks.
+ */
+enum {
+ UBI_LONGTERM = 1,
+ UBI_SHORTTERM = 2,
+ UBI_UNKNOWN = 3,
+};
+
+/*
+ * UBI volume type constants.
+ *
+ * @UBI_DYNAMIC_VOLUME: dynamic volume
+ * @UBI_STATIC_VOLUME: static volume
+ */
+enum {
+ UBI_DYNAMIC_VOLUME = 3,
+ UBI_STATIC_VOLUME = 4,
+};
+
+/**
+ * struct ubi_attach_req - attach MTD device request.
+ * @ubi_num: UBI device number to create
+ * @mtd_num: MTD device number to attach
+ * @vid_hdr_offset: VID header offset (use defaults if %0)
+ * @padding: reserved for future, not used, has to be zeroed
+ *
+ * This data structure is used to specify MTD device UBI has to attach and the
+ * parameters it has to use. The number which should be assigned to the new UBI
+ * device is passed in @ubi_num. UBI may automatically assign the number if
+ * @UBI_DEV_NUM_AUTO is passed. In this case, the device number is returned in
+ * @ubi_num.
+ *
+ * Most applications should pass %0 in @vid_hdr_offset to make UBI use default
+ * offset of the VID header within physical eraseblocks. The default offset is
+ * the next min. I/O unit after the EC header. For example, it will be offset
+ * 512 in case of a 512 bytes page NAND flash with no sub-page support. Or
+ * it will be 512 in case of a 2KiB page NAND flash with 4 512-byte sub-pages.
+ *
+ * But in rare cases, if this optimizes things, the VID header may be placed to
+ * a different offset. For example, the boot-loader might do things faster if the
+ * VID header sits at the end of the first 2KiB NAND page with 4 sub-pages. As
+ * the boot-loader would not normally need to read EC headers (unless it needs
+ * UBI in RW mode), it might be faster to calculate ECC. This is weird example,
+ * but it real-life example. So, in this example, @vid_hdr_offer would be
+ * 2KiB-64 bytes = 1984. Note, that this position is not even 512-bytes
+ * aligned, which is OK, as UBI is clever enough to realize this is 4th sub-page
+ * of the first page and add needed padding.
+ */
+struct ubi_attach_req {
+ int32_t ubi_num;
+ int32_t mtd_num;
+ int32_t vid_hdr_offset;
+ uint8_t padding[12];
+};
+
+/**
+ * struct ubi_mkvol_req - volume description data structure used in
+ * volume creation requests.
+ * @vol_id: volume number
+ * @alignment: volume alignment
+ * @bytes: volume size in bytes
+ * @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
+ * @padding1: reserved for future, not used, has to be zeroed
+ * @name_len: volume name length
+ * @padding2: reserved for future, not used, has to be zeroed
+ * @name: volume name
+ *
+ * This structure is used by user-space programs when creating new volumes. The
+ * @used_bytes field is only necessary when creating static volumes.
+ *
+ * The @alignment field specifies the required alignment of the volume logical
+ * eraseblock. This means, that the size of logical eraseblocks will be aligned
+ * to this number, i.e.,
+ * (UBI device logical eraseblock size) mod (@alignment) = 0.
+ *
+ * To put it differently, the logical eraseblock of this volume may be slightly
+ * shortened in order to make it properly aligned. The alignment has to be
+ * multiple of the flash minimal input/output unit, or %1 to utilize the entire
+ * available space of logical eraseblocks.
+ *
+ * The @alignment field may be useful, for example, when one wants to maintain
+ * a block device on top of an UBI volume. In this case, it is desirable to fit
+ * an integer number of blocks in logical eraseblocks of this UBI volume. With
+ * alignment it is possible to update this volume using plane UBI volume image
+ * BLOBs, without caring about how to properly align them.
+ */
+struct ubi_mkvol_req {
+ int32_t vol_id;
+ int32_t alignment;
+ int64_t bytes;
+ int8_t vol_type;
+ int8_t padding1;
+ int16_t name_len;
+ int8_t padding2[4];
+ char name[UBI_MAX_VOLUME_NAME + 1];
+} __attribute__ ((packed));
+
+/**
+ * struct ubi_rsvol_req - a data structure used in volume re-size requests.
+ * @vol_id: ID of the volume to re-size
+ * @bytes: new size of the volume in bytes
+ *
+ * Re-sizing is possible for both dynamic and static volumes. But while dynamic
+ * volumes may be re-sized arbitrarily, static volumes cannot be made to be
+ * smaller then the number of bytes they bear. To arbitrarily shrink a static
+ * volume, it must be wiped out first (by means of volume update operation with
+ * zero number of bytes).
+ */
+struct ubi_rsvol_req {
+ int64_t bytes;
+ int32_t vol_id;
+} __attribute__ ((packed));
+
+/**
+ * struct ubi_leb_change_req - a data structure used in atomic logical
+ * eraseblock change requests.
+ * @lnum: logical eraseblock number to change
+ * @bytes: how many bytes will be written to the logical eraseblock
+ * @dtype: data type (%UBI_LONGTERM, %UBI_SHORTTERM, %UBI_UNKNOWN)
+ * @padding: reserved for future, not used, has to be zeroed
+ */
+struct ubi_leb_change_req {
+ int32_t lnum;
+ int32_t bytes;
+ uint8_t dtype;
+ uint8_t padding[7];
+} __attribute__ ((packed));
+
+#endif /* __UBI_USER_H__ */
--
1.7.1
[-- Attachment #2: Type: text/plain, Size: 149 bytes --]
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^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 11/12] barebox ubi changes
2010-07-05 13:16 UBI support Sascha Hauer
` (9 preceding siblings ...)
2010-07-05 13:16 ` [PATCH 10/12] add ubi support from u-boot. Just enough to compile and scan Sascha Hauer
@ 2010-07-05 13:16 ` Sascha Hauer
2010-07-05 13:16 ` [PATCH 12/12] Add UBI commands: ubiattach, ubidetach, ubimkvol, ubirmvol Sascha Hauer
` (2 subsequent siblings)
13 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
This adds the layer between barebox and UBI.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/mtd/ubi/Makefile | 2 +-
drivers/mtd/ubi/build.c | 160 +++----------------------------
drivers/mtd/ubi/cdev.c | 238 ++++++++++++++++++++++++++++++++++++++++++++++
drivers/mtd/ubi/kapi.c | 4 +-
drivers/mtd/ubi/ubi.h | 9 ++-
drivers/mtd/ubi/upd.c | 36 ++++---
drivers/mtd/ubi/vmt.c | 14 ++--
include/mtd/ubi-user.h | 32 ++++++
8 files changed, 323 insertions(+), 172 deletions(-)
create mode 100644 drivers/mtd/ubi/cdev.c
diff --git a/drivers/mtd/ubi/Makefile b/drivers/mtd/ubi/Makefile
index 425c185..cef1141 100644
--- a/drivers/mtd/ubi/Makefile
+++ b/drivers/mtd/ubi/Makefile
@@ -1,3 +1,3 @@
-obj-y += build.o vtbl.o vmt.o upd.o kapi.o eba.o io.o wl.o scan.o misc.o debug.o
+obj-y += build.o vtbl.o vmt.o upd.o kapi.o eba.o io.o wl.o scan.o misc.o debug.o cdev.o
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 03ce392..a59972f 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -399,7 +399,7 @@ static int uif_init(struct ubi_device *ubi)
#ifdef UBI_LINUX
ubi->cdev.owner = THIS_MODULE;
#endif
- err = cdev_add(&ubi->cdev, dev, 1);
+ err = ubi_cdev_add(ubi);
if (err) {
ubi_err("cannot add character device");
goto out_unreg;
@@ -424,7 +424,7 @@ out_volumes:
kill_volumes(ubi);
out_sysfs:
ubi_sysfs_close(ubi);
- cdev_del(&ubi->cdev);
+ ubi_cdev_remove(ubi);
out_unreg:
unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
ubi_err("cannot initialize UBI %s, error %d", ubi->ubi_name, err);
@@ -439,7 +439,7 @@ static void uif_close(struct ubi_device *ubi)
{
kill_volumes(ubi);
ubi_sysfs_close(ubi);
- cdev_del(&ubi->cdev);
+ ubi_cdev_remove(ubi);
unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
}
@@ -724,7 +724,7 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
*/
for (i = 0; i < UBI_MAX_DEVICES; i++) {
ubi = ubi_devices[i];
- if (ubi && mtd->index == ubi->mtd->index) {
+ if (ubi && mtd == ubi->mtd) {
dbg_err("mtd%d is already attached to ubi%d",
mtd->index, i);
return -EEXIST;
@@ -879,15 +879,21 @@ out_free:
* Note, the invocations of this function has to be serialized by the
* @ubi_devices_mutex.
*/
-int ubi_detach_mtd_dev(int ubi_num, int anyway)
+int ubi_detach_mtd_dev(struct mtd_info *mtd, int anyway)
{
struct ubi_device *ubi;
-
- if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES)
- return -EINVAL;
+ int ubi_num = 0, i;
spin_lock(&ubi_devices_lock);
- ubi = ubi_devices[ubi_num];
+
+ for (i = 0; i < UBI_MAX_DEVICES; i++) {
+ ubi = ubi_devices[i];
+ if (ubi && mtd == ubi->mtd) {
+ ubi_num = i;
+ break;
+ }
+ }
+
if (!ubi) {
spin_unlock(&ubi_devices_lock);
return -EINVAL;
@@ -919,7 +925,6 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
ubi_eba_close(ubi);
ubi_wl_close(ubi);
vfree(ubi->vtbl);
- put_mtd_device(ubi->mtd);
vfree(ubi->peb_buf1);
vfree(ubi->peb_buf2);
#ifdef CONFIG_MTD_UBI_DEBUG
@@ -931,141 +936,6 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
}
/**
- * find_mtd_device - open an MTD device by its name or number.
- * @mtd_dev: name or number of the device
- *
- * This function tries to open and MTD device described by @mtd_dev string,
- * which is first treated as an ASCII number, and if it is not true, it is
- * treated as MTD device name. Returns MTD device description object in case of
- * success and a negative error code in case of failure.
- */
-static struct mtd_info * __init open_mtd_device(const char *mtd_dev)
-{
- struct mtd_info *mtd;
- int mtd_num;
- char *endp;
-
- mtd_num = simple_strtoul(mtd_dev, &endp, 0);
- if (*endp != '\0' || mtd_dev == endp) {
- /*
- * This does not look like an ASCII integer, probably this is
- * MTD device name.
- */
- mtd = get_mtd_device_nm(mtd_dev);
- } else
- mtd = get_mtd_device(NULL, mtd_num);
-
- return mtd;
-}
-
-int __init ubi_init(void)
-{
- int err, i, k;
-
- /* Ensure that EC and VID headers have correct size */
- BUILD_BUG_ON(sizeof(struct ubi_ec_hdr) != 64);
- BUILD_BUG_ON(sizeof(struct ubi_vid_hdr) != 64);
-
- if (mtd_devs > UBI_MAX_DEVICES) {
- ubi_err("too many MTD devices, maximum is %d", UBI_MAX_DEVICES);
- return -EINVAL;
- }
-
- /* Create base sysfs directory and sysfs files */
- ubi_class = class_create(THIS_MODULE, UBI_NAME_STR);
- if (IS_ERR(ubi_class)) {
- err = PTR_ERR(ubi_class);
- ubi_err("cannot create UBI class");
- goto out;
- }
-
- err = class_create_file(ubi_class, &ubi_version);
- if (err) {
- ubi_err("cannot create sysfs file");
- goto out_class;
- }
-
- err = misc_register(&ubi_ctrl_cdev);
- if (err) {
- ubi_err("cannot register device");
- goto out_version;
- }
-
-#ifdef UBI_LINUX
- ubi_wl_entry_slab = kmem_cache_create("ubi_wl_entry_slab",
- sizeof(struct ubi_wl_entry),
- 0, 0, NULL);
- if (!ubi_wl_entry_slab)
- goto out_dev_unreg;
-#endif
-
- /* Attach MTD devices */
- for (i = 0; i < mtd_devs; i++) {
- struct mtd_dev_param *p = &mtd_dev_param[i];
- struct mtd_info *mtd;
-
- cond_resched();
-
- mtd = open_mtd_device(p->name);
- if (IS_ERR(mtd)) {
- err = PTR_ERR(mtd);
- goto out_detach;
- }
-
- mutex_lock(&ubi_devices_mutex);
- err = ubi_attach_mtd_dev(mtd, UBI_DEV_NUM_AUTO,
- p->vid_hdr_offs);
- mutex_unlock(&ubi_devices_mutex);
- if (err < 0) {
- put_mtd_device(mtd);
- ubi_err("cannot attach mtd%d", mtd->index);
- goto out_detach;
- }
- }
-
- return 0;
-
-out_detach:
- for (k = 0; k < i; k++)
- if (ubi_devices[k]) {
- mutex_lock(&ubi_devices_mutex);
- ubi_detach_mtd_dev(ubi_devices[k]->ubi_num, 1);
- mutex_unlock(&ubi_devices_mutex);
- }
-#ifdef UBI_LINUX
- kmem_cache_destroy(ubi_wl_entry_slab);
-out_dev_unreg:
-#endif
- misc_deregister(&ubi_ctrl_cdev);
-out_version:
- class_remove_file(ubi_class, &ubi_version);
-out_class:
- class_destroy(ubi_class);
-out:
- ubi_err("UBI error: cannot initialize UBI, error %d", err);
- return err;
-}
-module_init(ubi_init);
-
-void __exit ubi_exit(void)
-{
- int i;
-
- for (i = 0; i < UBI_MAX_DEVICES; i++)
- if (ubi_devices[i]) {
- mutex_lock(&ubi_devices_mutex);
- ubi_detach_mtd_dev(ubi_devices[i]->ubi_num, 1);
- mutex_unlock(&ubi_devices_mutex);
- }
- kmem_cache_destroy(ubi_wl_entry_slab);
- misc_deregister(&ubi_ctrl_cdev);
- class_remove_file(ubi_class, &ubi_version);
- class_destroy(ubi_class);
- mtd_devs = 0;
-}
-module_exit(ubi_exit);
-
-/**
* bytes_str_to_int - convert a string representing number of bytes to an
* integer.
* @str: the string to convert
diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
new file mode 100644
index 0000000..30b8308
--- /dev/null
+++ b/drivers/mtd/ubi/cdev.c
@@ -0,0 +1,238 @@
+#include <common.h>
+#include <fcntl.h>
+#include <fs.h>
+#include <ioctl.h>
+#include "ubi-barebox.h"
+#include "ubi.h"
+
+struct ubi_volume_cdev_priv {
+ struct ubi_device *ubi;
+ struct ubi_volume *vol;
+ int updating;
+ unsigned long mode;
+};
+
+static ssize_t ubi_volume_cdev_read(struct cdev *cdev, void *buf, size_t size,
+ unsigned long offset, unsigned long flags)
+{
+ struct ubi_volume_cdev_priv *priv = cdev->priv;
+ struct ubi_volume *vol = priv->vol;
+ struct ubi_device *ubi = priv->ubi;
+ int err, lnum, off, len;
+ size_t count_save = size;
+ unsigned long long tmp;
+ loff_t offp = offset;
+ int usable_leb_size = vol->usable_leb_size;
+
+ printf("%s: %d @ 0x%08x\n", __func__, size, offset);
+
+ len = size > usable_leb_size ? usable_leb_size : size;
+
+ tmp = offp;
+ off = do_div(tmp, usable_leb_size);
+ lnum = tmp;
+ do {
+ if (off + len >= usable_leb_size)
+ len = usable_leb_size - off;
+
+ err = ubi_eba_read_leb(ubi, vol, lnum, buf, off, len, 0);
+ if (err) {
+ printf("read err %x\n", err);
+ break;
+ }
+ off += len;
+ if (off == usable_leb_size) {
+ lnum += 1;
+ off -= usable_leb_size;
+ }
+
+ size -= len;
+ offp += len;
+
+ buf += len;
+ len = size > usable_leb_size ? usable_leb_size : size;
+ } while (size);
+
+ return count_save;
+}
+
+static ssize_t ubi_volume_cdev_write(struct cdev* cdev, const void *buf,
+ size_t size, unsigned long offset, unsigned long flags)
+{
+ struct ubi_volume_cdev_priv *priv = cdev->priv;
+ struct ubi_volume *vol = priv->vol;
+ struct ubi_device *ubi = priv->ubi;
+ int err;
+
+ if (!priv->updating) {
+ err = ubi_start_update(ubi, vol, 16*1024*1024);
+ if (err < 0) {
+ printf("Cannot start volume update\n");
+ return err;
+ }
+ priv->updating = 1;
+ }
+
+ err = ubi_more_update_data(ubi, vol, buf, size);
+ if (err < 0) {
+ printf("Couldnt or partially wrote data \n");
+ return err;
+ }
+
+ return err;
+}
+
+static int ubi_volume_cdev_open(struct cdev *cdev, struct filep *f)
+{
+ struct ubi_volume_cdev_priv *priv = cdev->priv;
+
+ /* only allow read or write, but not both */
+ if ((f->flags & O_ACCMODE) == O_RDWR)
+ return -EINVAL;
+
+ priv->updating = 0;
+ priv->mode = f->flags & O_ACCMODE;
+
+ return 0;
+}
+
+static int ubi_volume_cdev_close(struct cdev *cdev, struct filep *f)
+{
+ struct ubi_volume_cdev_priv *priv = cdev->priv;
+ struct ubi_volume *vol = priv->vol;
+ struct ubi_device *ubi = priv->ubi;
+ int err;
+
+ if (priv->updating) {
+ err = ubi_finish_update(ubi, vol);
+ if (err)
+ return err;
+
+ err = ubi_check_volume(ubi, vol->vol_id);
+ if (err < 0) {
+ printf("check failed: %s\n", strerror(err));
+ return err;
+ }
+
+ if (err) {
+ ubi_warn("volume %d on UBI device %d is corrupted",
+ vol->vol_id, ubi->ubi_num);
+ vol->corrupted = 1;
+ }
+
+ vol->checked = 1;
+ ubi_gluebi_updated(vol);
+ }
+
+ return 0;
+}
+
+static off_t ubi_volume_cdev_lseek(struct cdev *cdev, off_t ofs)
+{
+ struct ubi_volume_cdev_priv *priv = cdev->priv;
+
+ /* We can only update ubi volumes sequentially */
+ if (priv->mode == O_WRONLY)
+ return -EINVAL;
+
+ return ofs;
+}
+
+static struct file_operations ubi_volume_fops = {
+ .open = ubi_volume_cdev_open,
+ .close = ubi_volume_cdev_close,
+ .read = ubi_volume_cdev_read,
+ .write = ubi_volume_cdev_write,
+ .lseek = ubi_volume_cdev_lseek,
+};
+
+int ubi_volume_cdev_add(struct ubi_device *ubi, struct ubi_volume *vol)
+{
+ struct cdev *cdev = &vol->cdev;
+ struct ubi_volume_cdev_priv *priv;
+ int ret;
+
+ priv = xzalloc(sizeof(*priv));
+
+ priv->vol = vol;
+ priv->ubi = ubi;
+
+ cdev->ops = &ubi_volume_fops;
+ cdev->name = asprintf("ubi%d.%s", ubi->ubi_num, vol->name);
+ cdev->priv = priv;
+ cdev->size = vol->used_bytes;
+ printf("registering %s as /dev/%s\n", vol->name, cdev->name);
+ ret = devfs_create(cdev);
+ if (ret) {
+ free(priv);
+ free(cdev->name);
+ }
+
+ return 0;
+}
+
+void ubi_volume_cdev_remove(struct ubi_volume *vol)
+{
+ struct cdev *cdev = &vol->cdev;
+ struct ubi_volume_cdev_priv *priv = cdev->priv;
+
+ devfs_remove(cdev);
+ free(cdev->name);
+ free(priv);
+}
+
+static int ubi_cdev_ioctl(struct cdev *cdev, int cmd, void *buf)
+{
+ struct ubi_volume_desc *desc;
+ struct ubi_device *ubi = cdev->priv;
+ struct ubi_mkvol_req *req = buf;
+
+ switch (cmd) {
+ case UBI_IOCRMVOL:
+ desc = ubi_open_volume_nm(ubi->ubi_num, req->name,
+ UBI_EXCLUSIVE);
+ if (IS_ERR(desc))
+ return PTR_ERR(desc);
+ ubi_remove_volume(desc);
+ break;
+ case UBI_IOCMKVOL:
+ if (!req->bytes)
+ req->bytes = ubi->avail_pebs * ubi->leb_size;
+ return ubi_create_volume(ubi, req);
+ };
+
+ return 0;
+}
+
+
+static struct file_operations ubi_fops = {
+ .ioctl = ubi_cdev_ioctl,
+};
+
+int ubi_cdev_add(struct ubi_device *ubi)
+{
+ struct cdev *cdev = &ubi->cdev;
+ int ret;
+
+ cdev->ops = &ubi_fops;
+ cdev->name = asprintf("ubi%d", ubi->ubi_num);
+ cdev->priv = ubi;
+ cdev->size = 0;
+
+ printf("registering /dev/%s\n", cdev->name);
+ ret = devfs_create(cdev);
+ if (ret)
+ free(cdev->name);
+
+ return ret;
+}
+
+void ubi_cdev_remove(struct ubi_device *ubi)
+{
+ struct cdev *cdev = &ubi->cdev;
+
+ printf("removing %s\n", cdev->name);
+
+ devfs_remove(cdev);
+ free(cdev->name);
+}
diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c
index fac76f2..d423f87 100644
--- a/drivers/mtd/ubi/kapi.c
+++ b/drivers/mtd/ubi/kapi.c
@@ -52,7 +52,7 @@ int ubi_get_device_info(int ubi_num, struct ubi_device_info *di)
di->leb_size = ubi->leb_size;
di->min_io_size = ubi->min_io_size;
di->ro_mode = ubi->ro_mode;
- di->cdev = ubi->cdev.dev;
+ di->cdev = &ubi->cdev;
ubi_put_device(ubi);
return 0;
@@ -81,7 +81,7 @@ void ubi_get_volume_info(struct ubi_volume_desc *desc,
vi->usable_leb_size = vol->usable_leb_size;
vi->name_len = vol->name_len;
vi->name = vol->name;
- vi->cdev = vol->cdev.dev;
+ vi->cdev = &vol->cdev;
}
EXPORT_SYMBOL_GPL(ubi_get_volume_info);
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index 358c8dc..5552237 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -448,6 +448,7 @@ void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol);
/* upd.c */
int ubi_start_update(struct ubi_device *ubi, struct ubi_volume *vol,
long long bytes);
+int ubi_finish_update(struct ubi_device *ubi, struct ubi_volume *vol);
int ubi_more_update_data(struct ubi_device *ubi, struct ubi_volume *vol,
const void __user *buf, int count);
int ubi_start_leb_change(struct ubi_device *ubi, struct ubi_volume *vol,
@@ -516,12 +517,18 @@ int ubi_io_write_vid_hdr(struct ubi_device *ubi, int pnum,
/* build.c */
int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset);
-int ubi_detach_mtd_dev(int ubi_num, int anyway);
+int ubi_detach_mtd_dev(struct mtd_info *mtd, int anyway);
struct ubi_device *ubi_get_device(int ubi_num);
void ubi_put_device(struct ubi_device *ubi);
struct ubi_device *ubi_get_by_major(int major);
int ubi_major2num(int major);
+/* cdev.c */
+int ubi_cdev_add(struct ubi_device *ubi);
+void ubi_cdev_remove(struct ubi_device *ubi);
+int ubi_volume_cdev_add(struct ubi_device *ubi, struct ubi_volume *vol);
+void ubi_volume_cdev_remove(struct ubi_volume *vol);
+
/*
* ubi_rb_for_each_entry - walk an RB-tree.
* @rb: a pointer to type 'struct rb_node' to to use as a loop counter
diff --git a/drivers/mtd/ubi/upd.c b/drivers/mtd/ubi/upd.c
index 8267b1a..fda2043 100644
--- a/drivers/mtd/ubi/upd.c
+++ b/drivers/mtd/ubi/upd.c
@@ -173,6 +173,23 @@ int ubi_start_update(struct ubi_device *ubi, struct ubi_volume *vol,
return 0;
}
+int ubi_finish_update(struct ubi_device *ubi, struct ubi_volume *vol)
+{
+ int err;
+
+ /* The update is finished, clear the update marker */
+ err = clear_update_marker(ubi, vol, vol->upd_bytes);
+ if (err)
+ return err;
+ err = ubi_wl_flush(ubi);
+ if (err == 0) {
+ vol->updating = 0;
+ vfree(vol->upd_buf);
+ }
+
+ return err;
+}
+
/**
* ubi_start_leb_change - start atomic LEB change.
* @ubi: UBI device description object
@@ -320,13 +337,12 @@ int ubi_more_update_data(struct ubi_device *ubi, struct ubi_volume *vol,
if (err)
return -EFAULT;
- if (offs + len == vol->usable_leb_size ||
- vol->upd_received + len == vol->upd_bytes) {
+ if (offs + len == vol->usable_leb_size) {
int flush_len = offs + len;
/*
- * OK, we gathered either the whole eraseblock or this
- * is the last chunk, it's time to flush the buffer.
+ * OK, we gathered the whole eraseblock, it's time to flush
+ * the buffer.
*/
ubi_assert(flush_len <= vol->usable_leb_size);
err = write_leb(ubi, vol, lnum, vol->upd_buf, flush_len,
@@ -370,18 +386,6 @@ int ubi_more_update_data(struct ubi_device *ubi, struct ubi_volume *vol,
}
ubi_assert(vol->upd_received <= vol->upd_bytes);
- if (vol->upd_received == vol->upd_bytes) {
- /* The update is finished, clear the update marker */
- err = clear_update_marker(ubi, vol, vol->upd_bytes);
- if (err)
- return err;
- err = ubi_wl_flush(ubi);
- if (err == 0) {
- vol->updating = 0;
- err = to_write;
- vfree(vol->upd_buf);
- }
- }
return err;
}
diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
index 935dcdc..4f1d0f4 100644
--- a/drivers/mtd/ubi/vmt.c
+++ b/drivers/mtd/ubi/vmt.c
@@ -323,7 +323,7 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
vol->cdev.owner = THIS_MODULE;
#endif
dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
- err = cdev_add(&vol->cdev, dev, 1);
+ err = ubi_volume_cdev_add(ubi, vol);
if (err) {
ubi_err("cannot add character device");
goto out_mapping;
@@ -390,7 +390,7 @@ out_gluebi:
dbg_err("cannot destroy gluebi for volume %d:%d",
ubi->ubi_num, vol_id);
out_cdev:
- cdev_del(&vol->cdev);
+ ubi_volume_cdev_remove(vol);
out_mapping:
kfree(vol->eba_tbl);
out_acc:
@@ -457,7 +457,7 @@ int ubi_remove_volume(struct ubi_volume_desc *desc)
kfree(vol->eba_tbl);
vol->eba_tbl = NULL;
- cdev_del(&vol->cdev);
+ ubi_volume_cdev_remove(vol);
volume_sysfs_close(vol);
spin_lock(&ubi->volumes_lock);
@@ -634,7 +634,7 @@ int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
vol->cdev.owner = THIS_MODULE;
#endif
dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
- err = cdev_add(&vol->cdev, dev, 1);
+ err = ubi_volume_cdev_add(ubi, vol);
if (err) {
ubi_err("cannot add character device for volume %d, error %d",
vol_id, err);
@@ -656,7 +656,7 @@ int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
err = volume_sysfs_init(ubi, vol);
if (err) {
- cdev_del(&vol->cdev);
+ ubi_volume_cdev_remove(vol);
err = ubi_destroy_gluebi(vol);
volume_sysfs_close(vol);
return err;
@@ -668,7 +668,7 @@ int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
out_gluebi:
err = ubi_destroy_gluebi(vol);
out_cdev:
- cdev_del(&vol->cdev);
+ ubi_volume_cdev_remove(vol);
return err;
}
@@ -688,7 +688,7 @@ void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol)
ubi->volumes[vol->vol_id] = NULL;
err = ubi_destroy_gluebi(vol);
- cdev_del(&vol->cdev);
+ ubi_volume_cdev_remove(vol);
volume_sysfs_close(vol);
}
diff --git a/include/mtd/ubi-user.h b/include/mtd/ubi-user.h
index a7421f1..62d8c93 100644
--- a/include/mtd/ubi-user.h
+++ b/include/mtd/ubi-user.h
@@ -265,4 +265,36 @@ struct ubi_leb_change_req {
uint8_t padding[7];
} __attribute__ ((packed));
+/**
+ * ubi_attach_mtd_dev - attach an MTD device.
+ * @mtd_dev: MTD device description object
+ * @ubi_num: number to assign to the new UBI device
+ * @vid_hdr_offset: VID header offset
+ *
+ * This function attaches MTD device @mtd_dev to UBI and assign @ubi_num number
+ * to the newly created UBI device, unless @ubi_num is %UBI_DEV_NUM_AUTO, in
+ * which case this function finds a vacant device nubert and assings it
+ * automatically. Returns the new UBI device number in case of success and a
+ * negative error code in case of failure.
+ *
+ * This of course is originally not exported but is now part of the UBI
+ * interface to barebox.
+ */
+int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset);
+
+/**
+ * ubi_detach_mtd_dev - detach an MTD device.
+ * @ubi_num: UBI device number to detach from
+ * @anyway: detach MTD even if device reference count is not zero
+ *
+ * This function destroys an UBI device number @ubi_num and detaches the
+ * underlying MTD device. Returns zero in case of success and %-EBUSY if the
+ * UBI device is busy and cannot be destroyed, and %-EINVAL if it does not
+ * exist.
+ *
+ * This of course is originally not exported but is now part of the UBI
+ * interface to barebox.
+ */
+int ubi_detach_mtd_dev(struct mtd_info *mtd, int anyway);
+
#endif /* __UBI_USER_H__ */
--
1.7.1
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http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 12/12] Add UBI commands: ubiattach, ubidetach, ubimkvol, ubirmvol
2010-07-05 13:16 UBI support Sascha Hauer
` (10 preceding siblings ...)
2010-07-05 13:16 ` [PATCH 11/12] barebox ubi changes Sascha Hauer
@ 2010-07-05 13:16 ` Sascha Hauer
2010-07-05 15:22 ` [PATCH 02/12] move drivers/nand to drivers/mtd/nand Alessandro Rubini
2010-07-08 9:19 ` UBI support Baruch Siach
13 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-05 13:16 UTC (permalink / raw)
To: barebox
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
commands/Kconfig | 6 +++
commands/Makefile | 1 +
commands/ubi.c | 129 +++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 136 insertions(+), 0 deletions(-)
create mode 100644 commands/ubi.c
diff --git a/commands/Kconfig b/commands/Kconfig
index 0ea32d9..1ffc826 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -180,6 +180,12 @@ menu "flash "
config CMD_FLASH
tristate
prompt "protect/erase"
+
+config CMD_UBI
+ tristate
+ default y if UBI
+ prompt "ubimkvol, ubirmvol, ubiattach"
+
endmenu
diff --git a/commands/Makefile b/commands/Makefile
index 3eef5de..b99f042 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -49,3 +49,4 @@ obj-$(CONFIG_USB_GADGET_DFU) += dfu.o
obj-$(CONFIG_CMD_GPIO) += gpio.o
obj-$(CONFIG_CMD_UNLZO) += unlzo.o
obj-$(CONFIG_CMD_I2C) += i2c.o
+obj-$(CONFIG_CMD_UBI) += ubi.o
diff --git a/commands/ubi.c b/commands/ubi.c
new file mode 100644
index 0000000..3da0835
--- /dev/null
+++ b/commands/ubi.c
@@ -0,0 +1,129 @@
+#include <common.h>
+#include <command.h>
+#include <fs.h>
+#include <fcntl.h>
+#include <ioctl.h>
+#include <errno.h>
+#include <getopt.h>
+#include <linux/mtd/mtd.h>
+#include <linux/kernel.h>
+#include <linux/mtd/mtd-abi.h>
+#include <mtd/ubi-user.h>
+#include <ubi-media.h>
+
+static int do_ubimkvol(struct command *cmdtp, int argc, char *argv[])
+{
+ struct ubi_mkvol_req req;
+ int fd, ret;
+ size_t size;
+
+ if (argc != 4)
+ return COMMAND_ERROR_USAGE;
+
+ size = strtoul_suffix(argv[3], NULL, 0);
+ req.name_len = min_t(int, strlen(argv[2]), UBI_VOL_NAME_MAX);
+ strncpy(req.name, argv[2], req.name_len);
+ req.name[req.name_len] = 0;
+
+ req.vol_type = UBI_DYNAMIC_VOLUME;
+ req.bytes = size;
+ req.vol_id = UBI_VOL_NUM_AUTO;
+ req.alignment = 1;
+
+ fd = open(argv[1], O_WRONLY);
+ if (fd < 0) {
+ perror("open");
+ return 1;
+ }
+
+ ret = ioctl(fd, UBI_IOCMKVOL, &req);
+ if (ret)
+ printf("failed to create: %s\n", strerror(-ret));
+ close(fd);
+
+ return ret ? 1 : 0;
+}
+
+static const __maybe_unused char cmd_ubimkvol_help[] =
+"Usage: ubimkvol <ubidev> <name> <size>\n"
+"Create an ubi volume on <ubidev> with name <name> and size <size>\n"
+"If size os zero all available space is used for the volume\n";
+
+BAREBOX_CMD_START(ubimkvol)
+ .cmd = do_ubimkvol,
+ .usage = "create an ubi volume",
+ BAREBOX_CMD_HELP(cmd_ubimkvol_help)
+BAREBOX_CMD_END
+
+
+static int do_ubiattach(struct command *cmdtp, int argc, char *argv[])
+{
+ struct mtd_info_user user;
+ int fd, ret;
+
+ if (argc != 2)
+ return COMMAND_ERROR_USAGE;
+
+ fd = open(argv[1], O_RDWR);
+ if (fd < 0) {
+ perror("open");
+ return 1;
+ }
+
+ ret = ioctl(fd, MEMGETINFO, &user);
+ if (!ret)
+ ret = ubi_attach_mtd_dev(user.mtd, UBI_DEV_NUM_AUTO, 0);
+
+ if (ret)
+ printf("failed to attach: %s\n", strerror(-ret));
+
+ close(fd);
+
+ return ret ? 1 : 0;
+}
+
+static const __maybe_unused char cmd_ubiattach_help[] =
+"Usage: ubiattach <mtddev>\n"
+"Attach <mtddev> to ubi\n";
+
+BAREBOX_CMD_START(ubiattach)
+ .cmd = do_ubiattach,
+ .usage = "attach a mtd dev to ubi",
+ BAREBOX_CMD_HELP(cmd_ubiattach_help)
+BAREBOX_CMD_END
+
+static int do_ubirmvol(struct command *cmdtp, int argc, char *argv[])
+{
+ struct ubi_mkvol_req req;
+ int fd, ret;
+
+ if (argc != 3)
+ return COMMAND_ERROR_USAGE;
+
+ strncpy(req.name, argv[2], UBI_VOL_NAME_MAX);
+ req.name[UBI_VOL_NAME_MAX] = 0;
+
+ fd = open(argv[1], O_WRONLY);
+ if (fd < 0) {
+ perror("open");
+ return 1;
+ }
+
+ ret = ioctl(fd, UBI_IOCRMVOL, &req);
+ if (ret)
+ printf("failed to delete: %s\n", strerror(-ret));
+ close(fd);
+
+ return ret ? 1 : 0;
+}
+
+static const __maybe_unused char cmd_ubirmvol_help[] =
+"Usage: ubirmvol <ubidev> <name>\n"
+"Delete ubi volume <name> from <ubidev>\n";
+
+BAREBOX_CMD_START(ubirmvol)
+ .cmd = do_ubirmvol,
+ .usage = "delete an ubi volume",
+ BAREBOX_CMD_HELP(cmd_ubirmvol_help)
+BAREBOX_CMD_END
+
--
1.7.1
_______________________________________________
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barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 02/12] move drivers/nand to drivers/mtd/nand
2010-07-05 13:16 UBI support Sascha Hauer
` (11 preceding siblings ...)
2010-07-05 13:16 ` [PATCH 12/12] Add UBI commands: ubiattach, ubidetach, ubimkvol, ubirmvol Sascha Hauer
@ 2010-07-05 15:22 ` Alessandro Rubini
2010-07-06 6:31 ` Sascha Hauer
2010-07-08 9:19 ` UBI support Baruch Siach
13 siblings, 1 reply; 19+ messages in thread
From: Alessandro Rubini @ 2010-07-05 15:22 UTC (permalink / raw)
To: s.hauer; +Cc: barebox
> Subject: [PATCH 02/12] move drivers/nand to drivers/mtd/nand
> Date: Mon, 5 Jul 2010 15:16:25 +0200
> drivers/mtd/nand/nand_base.c | 2648 +++++++++++++++++++++++++++++++++++++
> drivers/nand/nand_base.c | 2648 -------------------------------------
Shouldn't this have been generated with "git format-patch -M" ?
/alessandro
_______________________________________________
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^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 02/12] move drivers/nand to drivers/mtd/nand
2010-07-05 15:22 ` [PATCH 02/12] move drivers/nand to drivers/mtd/nand Alessandro Rubini
@ 2010-07-06 6:31 ` Sascha Hauer
0 siblings, 0 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-06 6:31 UTC (permalink / raw)
To: Alessandro Rubini; +Cc: barebox
On Mon, Jul 05, 2010 at 05:22:15PM +0200, Alessandro Rubini wrote:
> > Subject: [PATCH 02/12] move drivers/nand to drivers/mtd/nand
> > Date: Mon, 5 Jul 2010 15:16:25 +0200
>
> > drivers/mtd/nand/nand_base.c | 2648 +++++++++++++++++++++++++++++++++++++
> > drivers/nand/nand_base.c | 2648 -------------------------------------
>
> Shouldn't this have been generated with "git format-patch -M" ?
>
For the sake of readability, yes. Here it is:
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/Kconfig | 2 +-
drivers/Makefile | 2 +-
drivers/mtd/Kconfig | 8 ++++++++
drivers/mtd/Makefile | 1 +
drivers/{ => mtd}/nand/Kconfig | 2 +-
drivers/{ => mtd}/nand/Makefile | 0
drivers/{ => mtd}/nand/atmel_nand.c | 0
drivers/{ => mtd}/nand/atmel_nand_ecc.h | 0
drivers/{ => mtd}/nand/diskonchip.c | 0
drivers/{ => mtd}/nand/nand.c | 0
drivers/{ => mtd}/nand/nand_base.c | 0
drivers/{ => mtd}/nand/nand_bbt.c | 0
drivers/{ => mtd}/nand/nand_ecc.c | 0
drivers/{ => mtd}/nand/nand_ids.c | 0
drivers/{ => mtd}/nand/nand_imx.c | 0
drivers/{ => mtd}/nand/nand_omap_gpmc.c | 0
drivers/{ => mtd}/nand/nand_s3c2410.c | 0
drivers/{ => mtd}/nand/nand_util.c | 0
18 files changed, 12 insertions(+), 3 deletions(-)
create mode 100644 drivers/mtd/Kconfig
create mode 100644 drivers/mtd/Makefile
rename drivers/{ => mtd}/nand/Kconfig (98%)
rename drivers/{ => mtd}/nand/Makefile (100%)
rename drivers/{ => mtd}/nand/atmel_nand.c (100%)
rename drivers/{ => mtd}/nand/atmel_nand_ecc.h (100%)
rename drivers/{ => mtd}/nand/diskonchip.c (100%)
rename drivers/{ => mtd}/nand/nand.c (100%)
rename drivers/{ => mtd}/nand/nand_base.c (100%)
rename drivers/{ => mtd}/nand/nand_bbt.c (100%)
rename drivers/{ => mtd}/nand/nand_ecc.c (100%)
rename drivers/{ => mtd}/nand/nand_ids.c (100%)
rename drivers/{ => mtd}/nand/nand_imx.c (100%)
rename drivers/{ => mtd}/nand/nand_omap_gpmc.c (100%)
rename drivers/{ => mtd}/nand/nand_s3c2410.c (100%)
rename drivers/{ => mtd}/nand/nand_util.c (100%)
diff --git a/drivers/Kconfig b/drivers/Kconfig
index bf559c4..ae9efce 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -5,7 +5,7 @@ source "drivers/net/Kconfig"
source "drivers/spi/Kconfig"
source "drivers/i2c/Kconfig"
source "drivers/nor/Kconfig"
-source "drivers/nand/Kconfig"
+source "drivers/mtd/Kconfig"
source "drivers/ata/Kconfig"
source "drivers/usb/Kconfig"
source "drivers/video/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index 7bae6ff..bce68bc 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -1,6 +1,6 @@
obj-y += net/
obj-y += serial/
-obj-y += nand/
+obj-y += mtd/
obj-y += nor/
obj-y += usb/
obj-$(CONFIG_ATA) += ata/
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
new file mode 100644
index 0000000..53183fc
--- /dev/null
+++ b/drivers/mtd/Kconfig
@@ -0,0 +1,8 @@
+menuconfig MTD
+ bool "Memory Technology Device (MTD) support"
+
+if MTD
+
+source "drivers/mtd/nand/Kconfig"
+
+endif
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
new file mode 100644
index 0000000..87ee6f4
--- /dev/null
+++ b/drivers/mtd/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_NAND) += nand/
diff --git a/drivers/nand/Kconfig b/drivers/mtd/nand/Kconfig
similarity index 98%
rename from drivers/nand/Kconfig
rename to drivers/mtd/nand/Kconfig
index 031b94d..e0d9d0d 100644
--- a/drivers/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -1,5 +1,5 @@
menuconfig NAND
- bool "NAND support "
+ bool "NAND support "
select MTD_NAND_IDS
help
This enables support for accessing all type of NAND flash
diff --git a/drivers/nand/Makefile b/drivers/mtd/nand/Makefile
similarity index 100%
rename from drivers/nand/Makefile
rename to drivers/mtd/nand/Makefile
diff --git a/drivers/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
similarity index 100%
rename from drivers/nand/atmel_nand.c
rename to drivers/mtd/nand/atmel_nand.c
diff --git a/drivers/nand/atmel_nand_ecc.h b/drivers/mtd/nand/atmel_nand_ecc.h
similarity index 100%
rename from drivers/nand/atmel_nand_ecc.h
rename to drivers/mtd/nand/atmel_nand_ecc.h
diff --git a/drivers/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c
similarity index 100%
rename from drivers/nand/diskonchip.c
rename to drivers/mtd/nand/diskonchip.c
diff --git a/drivers/nand/nand.c b/drivers/mtd/nand/nand.c
similarity index 100%
rename from drivers/nand/nand.c
rename to drivers/mtd/nand/nand.c
diff --git a/drivers/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
similarity index 100%
rename from drivers/nand/nand_base.c
rename to drivers/mtd/nand/nand_base.c
diff --git a/drivers/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
similarity index 100%
rename from drivers/nand/nand_bbt.c
rename to drivers/mtd/nand/nand_bbt.c
diff --git a/drivers/nand/nand_ecc.c b/drivers/mtd/nand/nand_ecc.c
similarity index 100%
rename from drivers/nand/nand_ecc.c
rename to drivers/mtd/nand/nand_ecc.c
diff --git a/drivers/nand/nand_ids.c b/drivers/mtd/nand/nand_ids.c
similarity index 100%
rename from drivers/nand/nand_ids.c
rename to drivers/mtd/nand/nand_ids.c
diff --git a/drivers/nand/nand_imx.c b/drivers/mtd/nand/nand_imx.c
similarity index 100%
rename from drivers/nand/nand_imx.c
rename to drivers/mtd/nand/nand_imx.c
diff --git a/drivers/nand/nand_omap_gpmc.c b/drivers/mtd/nand/nand_omap_gpmc.c
similarity index 100%
rename from drivers/nand/nand_omap_gpmc.c
rename to drivers/mtd/nand/nand_omap_gpmc.c
diff --git a/drivers/nand/nand_s3c2410.c b/drivers/mtd/nand/nand_s3c2410.c
similarity index 100%
rename from drivers/nand/nand_s3c2410.c
rename to drivers/mtd/nand/nand_s3c2410.c
diff --git a/drivers/nand/nand_util.c b/drivers/mtd/nand/nand_util.c
similarity index 100%
rename from drivers/nand/nand_util.c
rename to drivers/mtd/nand/nand_util.c
--
1.7.1
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
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^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: UBI support
2010-07-05 13:16 UBI support Sascha Hauer
` (12 preceding siblings ...)
2010-07-05 15:22 ` [PATCH 02/12] move drivers/nand to drivers/mtd/nand Alessandro Rubini
@ 2010-07-08 9:19 ` Baruch Siach
2010-07-16 7:27 ` Sascha Hauer
13 siblings, 1 reply; 19+ messages in thread
From: Baruch Siach @ 2010-07-08 9:19 UTC (permalink / raw)
To: Sascha Hauer; +Cc: barebox
Hi Sascha,
On Mon, Jul 05, 2010 at 03:16:23PM +0200, Sascha Hauer wrote:
> The following series prepares and implements UBI for barebox. Here is a log
> while playing with UBI:
I've tested this on our i.MX25 board. Here's what I get:
barebox:/ ubiattach /dev/nand0.rootfs
UBI: attaching mtd0 to ubi0
UBI: physical eraseblock size: 131072 bytes (128 KiB)
UBI: logical eraseblock size: 129024 bytes
UBI: smallest flash I/O unit: 2048
UBI: sub-page size: 512
UBI: VID header offset: 512 (aligned 512)
UBI: data offset: 2048
UBI: empty MTD device detected
UBI: create volume table (copy #1)
UBI error: ubi_scan_get_free_peb: no eraseblocks found
failed to attach: error 28
The kernel is able to attach the same device as follows:
UBI: attaching mtd3 to ubi0
UBI: physical eraseblock size: 131072 bytes (128 KiB)
UBI: logical eraseblock size: 129024 bytes
UBI: smallest flash I/O unit: 2048
UBI: sub-page size: 512
UBI: VID header offset: 512 (aligned 512)
UBI: data offset: 2048
UBI: attached mtd3 to ubi0
UBI: MTD device name: "rootfs"
UBI: MTD device size: 122 MiB
UBI: number of good PEBs: 975
UBI: number of bad PEBs: 1
UBI: max. allowed volumes: 128
UBI: wear-leveling threshold: 4096
UBI: number of internal volumes: 1
UBI: number of user volumes: 1
UBI: available PEBs: 0
UBI: total number of reserved PEBs: 975
UBI: number of PEBs reserved for bad PEB handling: 9
UBI: max/mean erase counter: 1/0
UBI: image sequence number: 1519924105
UBI: background thread "ubi_bgt0d" started, PID 852
Where should I look to diagnose this?
baruch
--
~. .~ Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
- baruch@tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
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^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: UBI support
2010-07-08 9:19 ` UBI support Baruch Siach
@ 2010-07-16 7:27 ` Sascha Hauer
2010-07-16 8:57 ` Eric Bénard
2010-07-16 12:13 ` Esben Haabendal
0 siblings, 2 replies; 19+ messages in thread
From: Sascha Hauer @ 2010-07-16 7:27 UTC (permalink / raw)
To: Baruch Siach; +Cc: barebox
Hi Baruch,
On Thu, Jul 08, 2010 at 12:19:25PM +0300, Baruch Siach wrote:
> Hi Sascha,
>
> On Mon, Jul 05, 2010 at 03:16:23PM +0200, Sascha Hauer wrote:
> > The following series prepares and implements UBI for barebox. Here is a log
> > while playing with UBI:
>
> I've tested this on our i.MX25 board. Here's what I get:
>
> barebox:/ ubiattach /dev/nand0.rootfs
> UBI: attaching mtd0 to ubi0
> UBI: physical eraseblock size: 131072 bytes (128 KiB)
> UBI: logical eraseblock size: 129024 bytes
> UBI: smallest flash I/O unit: 2048
> UBI: sub-page size: 512
> UBI: VID header offset: 512 (aligned 512)
> UBI: data offset: 2048
> UBI: empty MTD device detected
> UBI: create volume table (copy #1)
> UBI error: ubi_scan_get_free_peb: no eraseblocks found
> failed to attach: error 28
I just tested it on an i.MX35 board which should have the same Nand
Controller as the i.MX25. I have never seen Nand devices with a subpage
size smaller than the I/O unit size (sub-page size: 512), so I would
start looking there.
I don't know how this subpage size is handled. It may well be that this
is a bug in the Nand driver and not UBI.
You could also go through 'git log drivers/mtd/ubi' in the kernel to see
if there's something relevant. Unfortunately I don't know from which
kernel version the U-Boot UBI code was derived from.
Sascha
>
> The kernel is able to attach the same device as follows:
>
> UBI: attaching mtd3 to ubi0
> UBI: physical eraseblock size: 131072 bytes (128 KiB)
> UBI: logical eraseblock size: 129024 bytes
> UBI: smallest flash I/O unit: 2048
> UBI: sub-page size: 512
> UBI: VID header offset: 512 (aligned 512)
> UBI: data offset: 2048
> UBI: attached mtd3 to ubi0
> UBI: MTD device name: "rootfs"
> UBI: MTD device size: 122 MiB
> UBI: number of good PEBs: 975
> UBI: number of bad PEBs: 1
> UBI: max. allowed volumes: 128
> UBI: wear-leveling threshold: 4096
> UBI: number of internal volumes: 1
> UBI: number of user volumes: 1
> UBI: available PEBs: 0
> UBI: total number of reserved PEBs: 975
> UBI: number of PEBs reserved for bad PEB handling: 9
> UBI: max/mean erase counter: 1/0
> UBI: image sequence number: 1519924105
> UBI: background thread "ubi_bgt0d" started, PID 852
>
> Where should I look to diagnose this?
>
> baruch
>
> --
> ~. .~ Tk Open Systems
> =}------------------------------------------------ooO--U--Ooo------------{=
> - baruch@tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
>
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: UBI support
2010-07-16 7:27 ` Sascha Hauer
@ 2010-07-16 8:57 ` Eric Bénard
2010-07-16 12:13 ` Esben Haabendal
1 sibling, 0 replies; 19+ messages in thread
From: Eric Bénard @ 2010-07-16 8:57 UTC (permalink / raw)
To: Sascha Hauer; +Cc: barebox
Hi Sascha, Hi Baruch,
Le 16/07/2010 09:27, Sascha Hauer a écrit :
>> On Mon, Jul 05, 2010 at 03:16:23PM +0200, Sascha Hauer wrote:
>>> The following series prepares and implements UBI for barebox. Here is a log
>>> while playing with UBI:
>>
>> I've tested this on our i.MX25 board. Here's what I get:
>>
>> barebox:/ ubiattach /dev/nand0.rootfs
>> UBI: attaching mtd0 to ubi0
>> UBI: physical eraseblock size: 131072 bytes (128 KiB)
>> UBI: logical eraseblock size: 129024 bytes
>> UBI: smallest flash I/O unit: 2048
>> UBI: sub-page size: 512
>> UBI: VID header offset: 512 (aligned 512)
>> UBI: data offset: 2048
>> UBI: empty MTD device detected
>> UBI: create volume table (copy #1)
>> UBI error: ubi_scan_get_free_peb: no eraseblocks found
>> failed to attach: error 28
>
> I just tested it on an i.MX35 board which should have the same Nand
> Controller as the i.MX25. I have never seen Nand devices with a subpage
> size smaller than the I/O unit size (sub-page size: 512), so I would
> start looking there.
I have exactly the same log under linux here on an i.MX35 & i.MX25,
using 2k Micron Nand :
on i.MX35 :
[ 1.060000] UBI: attaching mtd3 to ubi0
[ 1.070000] UBI: physical eraseblock size: 131072 bytes (128 KiB)
[ 1.070000] UBI: logical eraseblock size: 129024 bytes
[ 1.080000] UBI: smallest flash I/O unit: 2048
[ 1.080000] UBI: sub-page size: 512
[ 1.090000] UBI: VID header offset: 512 (aligned 512)
[ 1.090000] UBI: data offset: 2048
[ 1.420000] UBI: attached mtd3 to ubi0
on i.MX25 :
[ 0.840000] UBI: attaching mtd3 to ubi0
[ 0.840000] UBI: physical eraseblock size: 131072 bytes (128 KiB)
[ 0.850000] UBI: logical eraseblock size: 129024 bytes
[ 0.860000] UBI: smallest flash I/O unit: 2048
[ 0.860000] UBI: sub-page size: 512
[ 0.860000] UBI: VID header offset: 512 (aligned 512)
[ 0.870000] UBI: data offset: 2048
[ 1.460000] UBI: attached mtd3 to ubi0
Eric
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^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: UBI support
2010-07-16 7:27 ` Sascha Hauer
2010-07-16 8:57 ` Eric Bénard
@ 2010-07-16 12:13 ` Esben Haabendal
1 sibling, 0 replies; 19+ messages in thread
From: Esben Haabendal @ 2010-07-16 12:13 UTC (permalink / raw)
To: Sascha Hauer; +Cc: barebox
On Fri, 2010-07-16 at 09:27 +0200, Sascha Hauer wrote:
> >
> > I've tested this on our i.MX25 board. Here's what I get:
> >
> > barebox:/ ubiattach /dev/nand0.rootfs
> > UBI: attaching mtd0 to ubi0
> > UBI: physical eraseblock size: 131072 bytes (128 KiB)
> > UBI: logical eraseblock size: 129024 bytes
> > UBI: smallest flash I/O unit: 2048
> > UBI: sub-page size: 512
> > UBI: VID header offset: 512 (aligned 512)
> > UBI: data offset: 2048
> > UBI: empty MTD device detected
> > UBI: create volume table (copy #1)
> > UBI error: ubi_scan_get_free_peb: no eraseblocks found
> > failed to attach: error 28
>
> I just tested it on an i.MX35 board which should have the same Nand
> Controller as the i.MX25. I have never seen Nand devices with a subpage
> size smaller than the I/O unit size (sub-page size: 512), so I would
> start looking there.
> I don't know how this subpage size is handled. It may well be that this
> is a bug in the Nand driver and not UBI.
> You could also go through 'git log drivers/mtd/ubi' in the kernel to see
> if there's something relevant. Unfortunately I don't know from which
> kernel version the U-Boot UBI code was derived from.
FWIW, I am working on a device here with a similar NAND device.
To get it working properly, you must not enable
CONFIG_MTD_NAND_VERIFY_WRITE (as it is known to be broken for sub-page
size != I/O unit size). I haven't looked at barebox nand or ubi driver,
so I have no idea if something similar to this could be present there.
/Esben
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^ permalink raw reply [flat|nested] 19+ messages in thread
end of thread, other threads:[~2010-07-16 12:21 UTC | newest]
Thread overview: 19+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-07-05 13:16 UBI support Sascha Hauer
2010-07-05 13:16 ` [PATCH 01/12] crc32: activate crc32_no_comp (needed for jffs2 and UBI) Sascha Hauer
2010-07-05 13:16 ` [PATCH 02/12] move drivers/nand to drivers/mtd/nand Sascha Hauer
2010-07-05 13:16 ` [PATCH 03/12] add rbtree support (needed for ubi) Sascha Hauer
2010-07-05 13:16 ` [PATCH 04/12] add partition mtd support Sascha Hauer
2010-07-05 13:16 ` [PATCH 05/12] cfi_flash: Do not typedef struct flash_info Sascha Hauer
2010-07-05 13:16 ` [PATCH 06/12] cfi_flash: Do not print debug info while erasing Sascha Hauer
2010-07-05 13:16 ` [PATCH 07/12] cfi_flash: Add mtd partition support for UBI Sascha Hauer
2010-07-05 13:16 ` [PATCH 08/12] devfs: only check for ioctl function when needed Sascha Hauer
2010-07-05 13:16 ` [PATCH 09/12] include stuff missing for ubi Sascha Hauer
2010-07-05 13:16 ` [PATCH 10/12] add ubi support from u-boot. Just enough to compile and scan Sascha Hauer
2010-07-05 13:16 ` [PATCH 11/12] barebox ubi changes Sascha Hauer
2010-07-05 13:16 ` [PATCH 12/12] Add UBI commands: ubiattach, ubidetach, ubimkvol, ubirmvol Sascha Hauer
2010-07-05 15:22 ` [PATCH 02/12] move drivers/nand to drivers/mtd/nand Alessandro Rubini
2010-07-06 6:31 ` Sascha Hauer
2010-07-08 9:19 ` UBI support Baruch Siach
2010-07-16 7:27 ` Sascha Hauer
2010-07-16 8:57 ` Eric Bénard
2010-07-16 12:13 ` Esben Haabendal
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