* [PATCH 01/10] drivers/nor/m25p80: add JEDEC ID for Micron/Numonyx SPI NOR flash
2012-09-03 11:45 Prepare support for TI AM35xx Jan Luebbe
@ 2012-09-03 11:45 ` Jan Luebbe
2012-09-03 11:45 ` [PATCH 02/10] drivers/nor/m25p80: add MEMGETINFO ioctl Jan Luebbe
` (8 subsequent siblings)
9 siblings, 0 replies; 24+ messages in thread
From: Jan Luebbe @ 2012-09-03 11:45 UTC (permalink / raw)
To: barebox
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
---
drivers/nor/m25p80.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/nor/m25p80.c b/drivers/nor/m25p80.c
index 5713ad5..61f2195 100644
--- a/drivers/nor/m25p80.c
+++ b/drivers/nor/m25p80.c
@@ -648,6 +648,9 @@ static const struct spi_device_id m25p_ids[] = {
{ "cat25c09", CAT25_INFO( 128, 8, 32, 2) },
{ "cat25c17", CAT25_INFO( 256, 8, 32, 2) },
{ "cat25128", CAT25_INFO(2048, 8, 64, 2) },
+
+ /* Micron */
+ { "n25q128", INFO(0x20ba18, 0, 64 * 1024, 256, 0) },
{ },
};
--
1.7.10.4
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^ permalink raw reply [flat|nested] 24+ messages in thread* [PATCH 02/10] drivers/nor/m25p80: add MEMGETINFO ioctl
2012-09-03 11:45 Prepare support for TI AM35xx Jan Luebbe
2012-09-03 11:45 ` [PATCH 01/10] drivers/nor/m25p80: add JEDEC ID for Micron/Numonyx SPI NOR flash Jan Luebbe
@ 2012-09-03 11:45 ` Jan Luebbe
2012-09-04 8:20 ` Sascha Hauer
2012-09-03 11:45 ` [PATCH 03/10] Makefile: add target to produce a SPL compatible uimage Jan Luebbe
` (7 subsequent siblings)
9 siblings, 1 reply; 24+ messages in thread
From: Jan Luebbe @ 2012-09-03 11:45 UTC (permalink / raw)
To: barebox
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
---
drivers/nor/m25p80.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/nor/m25p80.c b/drivers/nor/m25p80.c
index 61f2195..1722e0a 100644
--- a/drivers/nor/m25p80.c
+++ b/drivers/nor/m25p80.c
@@ -20,6 +20,7 @@
#include <common.h>
#include <init.h>
#include <driver.h>
+#include <ioctl.h>
#include <spi/spi.h>
#include <spi/flash.h>
#include <xfuncs.h>
@@ -690,9 +691,34 @@ static const struct spi_device_id *jedec_probe(struct spi_device *spi)
return NULL;
}
+static int m25p80_ioctl(struct cdev *cdev, int request, void *buf)
+{
+ struct m25p *flash = cdev->priv;
+ struct flash_info *info = flash->info;
+ struct mtd_info_user *user = buf;
+
+ switch (request) {
+ case MEMGETINFO:
+ memset(user, 0, sizeof(*user));
+ user->type = MTD_NORFLASH;
+ user->flags = MTD_CAP_NORFLASH;
+ user->size = flash->size;
+ user->erasesize = info->sector_size;
+ user->writesize = 1;
+ user->oobsize = 0;
+ /* The below fields are obsolete */
+ user->ecctype = -1;
+ user->eccsize = 0;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
static struct file_operations m25p80_ops = {
.read = m25p80_read,
.write = m25p80_write,
+ .ioctl = m25p80_ioctl,
.erase = m25p80_erase,
.lseek = dev_lseek_default,
};
--
1.7.10.4
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^ permalink raw reply [flat|nested] 24+ messages in thread* Re: [PATCH 02/10] drivers/nor/m25p80: add MEMGETINFO ioctl
2012-09-03 11:45 ` [PATCH 02/10] drivers/nor/m25p80: add MEMGETINFO ioctl Jan Luebbe
@ 2012-09-04 8:20 ` Sascha Hauer
0 siblings, 0 replies; 24+ messages in thread
From: Sascha Hauer @ 2012-09-04 8:20 UTC (permalink / raw)
To: Jan Luebbe; +Cc: barebox
On Mon, Sep 03, 2012 at 01:45:57PM +0200, Jan Luebbe wrote:
> Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
> ---
> drivers/nor/m25p80.c | 26 ++++++++++++++++++++++++++
> 1 file changed, 26 insertions(+)
>
> diff --git a/drivers/nor/m25p80.c b/drivers/nor/m25p80.c
> index 61f2195..1722e0a 100644
> --- a/drivers/nor/m25p80.c
> +++ b/drivers/nor/m25p80.c
> @@ -20,6 +20,7 @@
> #include <common.h>
> #include <init.h>
> #include <driver.h>
> +#include <ioctl.h>
> #include <spi/spi.h>
> #include <spi/flash.h>
> #include <xfuncs.h>
> @@ -690,9 +691,34 @@ static const struct spi_device_id *jedec_probe(struct spi_device *spi)
> return NULL;
> }
>
> +static int m25p80_ioctl(struct cdev *cdev, int request, void *buf)
> +{
> + struct m25p *flash = cdev->priv;
> + struct flash_info *info = flash->info;
> + struct mtd_info_user *user = buf;
> +
> + switch (request) {
> + case MEMGETINFO:
> + memset(user, 0, sizeof(*user));
> + user->type = MTD_NORFLASH;
> + user->flags = MTD_CAP_NORFLASH;
> + user->size = flash->size;
> + user->erasesize = info->sector_size;
> + user->writesize = 1;
> + user->oobsize = 0;
> + /* The below fields are obsolete */
> + user->ecctype = -1;
> + user->eccsize = 0;
> + return 0;
> + }
> +
> + return -EINVAL;
> +}
> +
> static struct file_operations m25p80_ops = {
> .read = m25p80_read,
> .write = m25p80_write,
> + .ioctl = m25p80_ioctl,
Rather than doing this you should simply fill in cdev->mtd. See how the
cfi flash driver does this. Then it will also work for partitions on a
m25p80.
Sascha
--
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] 24+ messages in thread
* [PATCH 03/10] Makefile: add target to produce a SPL compatible uimage
2012-09-03 11:45 Prepare support for TI AM35xx Jan Luebbe
2012-09-03 11:45 ` [PATCH 01/10] drivers/nor/m25p80: add JEDEC ID for Micron/Numonyx SPI NOR flash Jan Luebbe
2012-09-03 11:45 ` [PATCH 02/10] drivers/nor/m25p80: add MEMGETINFO ioctl Jan Luebbe
@ 2012-09-03 11:45 ` Jan Luebbe
2012-09-03 16:22 ` Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 11:45 ` [PATCH 04/10] scripts: add tool to create image for SPI boot on AM35xx Jan Luebbe
` (6 subsequent siblings)
9 siblings, 1 reply; 24+ messages in thread
From: Jan Luebbe @ 2012-09-03 11:45 UTC (permalink / raw)
To: barebox
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
---
Makefile | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Makefile b/Makefile
index 969afbb..243a689 100644
--- a/Makefile
+++ b/Makefile
@@ -673,6 +673,11 @@ barebox.bin: barebox FORCE
$(call if_changed,objcopy)
$(call cmd,check_file_size,$(CONFIG_BAREBOX_MAX_IMAGE_SIZE))
+barebox.img: barebox.bin
+ $(srctree)/scripts/mkimage -A $(ARCH) -T firmware -C none \
+ -O barebox -a $(CONFIG_TEXT_BASE) -e $(CONFIG_TEXT_BASE) \
+ -n "barebox $(KERNELRELEASE)" -d $< $@
+
ifdef CONFIG_X86
barebox.S: barebox
ifdef CONFIG_X86_HDBOOT
--
1.7.10.4
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^ permalink raw reply [flat|nested] 24+ messages in thread* Re: [PATCH 03/10] Makefile: add target to produce a SPL compatible uimage
2012-09-03 11:45 ` [PATCH 03/10] Makefile: add target to produce a SPL compatible uimage Jan Luebbe
@ 2012-09-03 16:22 ` Jean-Christophe PLAGNIOL-VILLARD
0 siblings, 0 replies; 24+ messages in thread
From: Jean-Christophe PLAGNIOL-VILLARD @ 2012-09-03 16:22 UTC (permalink / raw)
To: Jan Luebbe; +Cc: barebox
On 13:45 Mon 03 Sep , Jan Luebbe wrote:
> Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
> ---
> Makefile | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/Makefile b/Makefile
> index 969afbb..243a689 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -673,6 +673,11 @@ barebox.bin: barebox FORCE
> $(call if_changed,objcopy)
> $(call cmd,check_file_size,$(CONFIG_BAREBOX_MAX_IMAGE_SIZE))
>
> +barebox.img: barebox.bin
> + $(srctree)/scripts/mkimage -A $(ARCH) -T firmware -C none \
> + -O barebox -a $(CONFIG_TEXT_BASE) -e $(CONFIG_TEXT_BASE) \
> + -n "barebox $(KERNELRELEASE)" -d $< $@
> +
you must us this kbuild style
quiet_cmd_xxx
cmd_xxx
and you need to use the $(KBUILD_IMAGE) present in the next
Best Regards,
J.
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^ permalink raw reply [flat|nested] 24+ messages in thread
* [PATCH 04/10] scripts: add tool to create image for SPI boot on AM35xx
2012-09-03 11:45 Prepare support for TI AM35xx Jan Luebbe
` (2 preceding siblings ...)
2012-09-03 11:45 ` [PATCH 03/10] Makefile: add target to produce a SPL compatible uimage Jan Luebbe
@ 2012-09-03 11:45 ` Jan Luebbe
2012-09-04 8:27 ` Sascha Hauer
2012-09-03 11:46 ` [PATCH 05/10] common: split out meminfo output and make it optional Jan Luebbe
` (5 subsequent siblings)
9 siblings, 1 reply; 24+ messages in thread
From: Jan Luebbe @ 2012-09-03 11:45 UTC (permalink / raw)
To: barebox
Booting from SPI on an AM35xx (and possibly other TI SOCs) requires
a special format:
- 32 bit image size in big-endian
- 32 bit load address in big-endian
- binary image converted from little- to big-endian
The mk-am35xx-spi-image tool converts barebox.bin to
this format.
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
---
arch/arm/Makefile | 8 +++
arch/arm/mach-omap/Kconfig | 7 +++
scripts/.gitignore | 1 +
scripts/Makefile | 2 +-
scripts/mk-am35xx-spi-image.c | 126 +++++++++++++++++++++++++++++++++++++++++
5 files changed, 143 insertions(+), 1 deletion(-)
create mode 100644 scripts/mk-am35xx-spi-image.c
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 1b60261..ff96299 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -199,6 +199,14 @@ endif
all: $(KBUILD_IMAGE)
+barebox.spi: barebox.bin
+ @echo " SPI " $@
+ $(Q)scripts/mk-am35xx-spi-image barebox.bin > barebox.spi
+
+ifeq ($(CONFIG_OMAP_BUILD_SPI),y)
+all: barebox.spi
+endif
+
archprepare: maketools
maketools:
$(Q)$(MAKE) $(build)=arch/arm/tools include/generated/mach-types.h
diff --git a/arch/arm/mach-omap/Kconfig b/arch/arm/mach-omap/Kconfig
index d735284..a781287 100644
--- a/arch/arm/mach-omap/Kconfig
+++ b/arch/arm/mach-omap/Kconfig
@@ -91,6 +91,13 @@ config OMAP_BUILD_IFT
prompt "build ift binary"
bool
+config OMAP_BUILD_SPI
+ prompt "build SPI binary"
+ bool
+ help
+ Say Y here if you want to build an barebox.spi image as used
+ on the AM35xx chips when booting form SPI NOR flash.
+
config ARCH_TEXT_BASE
hex
default 0x80e80000 if MACH_OMAP343xSDP
diff --git a/scripts/.gitignore b/scripts/.gitignore
index 6e63f85..3f1cbdb 100644
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@@ -2,6 +2,7 @@ bareboxenv
bin2c
gen_netx_image
kallsyms
+mk-am35xx-spi-image
mkimage
mkublheader
omap_signGP
diff --git a/scripts/Makefile b/scripts/Makefile
index 7ca5e29..55ccdac 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -9,7 +9,7 @@ hostprogs-y += bin2c
hostprogs-y += mkimage
hostprogs-y += bareboxenv
hostprogs-$(CONFIG_ARCH_NETX) += gen_netx_image
-hostprogs-$(CONFIG_ARCH_OMAP) += omap_signGP
+hostprogs-$(CONFIG_ARCH_OMAP) += omap_signGP mk-am35xx-spi-image
hostprogs-$(CONFIG_ARCH_S5PCxx) += s5p_cksum
hostprogs-$(CONFIG_ARCH_DAVINCI) += mkublheader
diff --git a/scripts/mk-am35xx-spi-image.c b/scripts/mk-am35xx-spi-image.c
new file mode 100644
index 0000000..133f2b7
--- /dev/null
+++ b/scripts/mk-am35xx-spi-image.c
@@ -0,0 +1,126 @@
+/*
+ * mkublheader.c - produce the header needed to load barebox on OMAP-L138
+ *
+ * Copyright (C) 2012 Jan Luebbe <j.luebbe@pengutronix.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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define _BSD_SOURCE
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <limits.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <endian.h>
+
+void usage(char *prgname)
+{
+ printf("usage: %s [OPTION] FILE > IMAGE\n"
+ "\n"
+ "options:\n"
+ " -a <address> memory address for the loaded image in SRAM\n",
+ prgname);
+}
+
+int main(int argc, char *argv[])
+{
+ FILE *input;
+ int opt;
+ off_t pos;
+ size_t size;
+ uint32_t addr = 0x40200000;
+ uint32_t temp;
+
+ while((opt = getopt(argc, argv, "a:")) != -1) {
+ switch (opt) {
+ case 'a':
+ addr = strtoul(optarg, NULL, 0);
+ break;
+ }
+ }
+
+ if (optind >= argc) {
+ usage(argv[0]);
+ exit(1);
+ }
+
+ input = fopen(argv[optind], "r");
+ if (input == NULL) {
+ perror("fopen");
+ exit(EXIT_FAILURE);
+ }
+
+ if (fseeko(input, 0, SEEK_END) == -1) {
+ perror("fseeko");
+ exit(EXIT_FAILURE);
+ }
+
+ pos = ftello(input);
+ if (pos == -1) {
+ perror("ftello");
+ exit(EXIT_FAILURE);
+ }
+ if (pos % 4) {
+ printf("error: image size must be a multiple of 4 bytes\n");
+ exit(EXIT_FAILURE);
+ }
+ if (pos > 0x100000) {
+ printf("error: image should be smaller than 1 MiB\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if (fseeko(input, 0, SEEK_SET) == -1) {
+ perror("fseeko");
+ exit(EXIT_FAILURE);
+ }
+
+ /* image size */
+ temp = htobe32((uint32_t)pos);
+ fwrite(&temp, sizeof(uint32_t), 1, stdout);
+
+ /* memory address */
+ temp = htobe32(addr);
+ fwrite(&temp, sizeof(uint32_t), 1, stdout);
+
+ for (;;) {
+ size = fread(&temp, 1, sizeof(uint32_t), input);
+ if (!size)
+ break;
+ if (size != 4) {
+ perror("fread");
+ exit(EXIT_FAILURE);
+ }
+ temp = htobe32(le32toh(temp));
+ if (fwrite(&temp, 1, sizeof(uint32_t), stdout) != 4) {
+ perror("fwrite");
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ if (fclose(input) != 0) {
+ perror("fclose");
+ exit(EXIT_FAILURE);
+ }
+
+ exit(EXIT_SUCCESS);
+}
--
1.7.10.4
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^ permalink raw reply [flat|nested] 24+ messages in thread* Re: [PATCH 04/10] scripts: add tool to create image for SPI boot on AM35xx
2012-09-03 11:45 ` [PATCH 04/10] scripts: add tool to create image for SPI boot on AM35xx Jan Luebbe
@ 2012-09-04 8:27 ` Sascha Hauer
0 siblings, 0 replies; 24+ messages in thread
From: Sascha Hauer @ 2012-09-04 8:27 UTC (permalink / raw)
To: Jan Luebbe; +Cc: barebox
On Mon, Sep 03, 2012 at 01:45:59PM +0200, Jan Luebbe wrote:
> Booting from SPI on an AM35xx (and possibly other TI SOCs) requires
> a special format:
>
> - 32 bit image size in big-endian
> - 32 bit load address in big-endian
> - binary image converted from little- to big-endian
>
> The mk-am35xx-spi-image tool converts barebox.bin to
> this format.
>
> Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
> ---
> arch/arm/Makefile | 8 +++
> arch/arm/mach-omap/Kconfig | 7 +++
> scripts/.gitignore | 1 +
> scripts/Makefile | 2 +-
> scripts/mk-am35xx-spi-image.c | 126 +++++++++++++++++++++++++++++++++++++++++
> 5 files changed, 143 insertions(+), 1 deletion(-)
> create mode 100644 scripts/mk-am35xx-spi-image.c
>
> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> index 1b60261..ff96299 100644
> --- a/arch/arm/Makefile
> +++ b/arch/arm/Makefile
> @@ -199,6 +199,14 @@ endif
>
> all: $(KBUILD_IMAGE)
>
> +barebox.spi: barebox.bin
> + @echo " SPI " $@
> + $(Q)scripts/mk-am35xx-spi-image barebox.bin > barebox.spi
> +
> +ifeq ($(CONFIG_OMAP_BUILD_SPI),y)
> +all: barebox.spi
> +endif
> +
> archprepare: maketools
> maketools:
> $(Q)$(MAKE) $(build)=arch/arm/tools include/generated/mach-types.h
> diff --git a/arch/arm/mach-omap/Kconfig b/arch/arm/mach-omap/Kconfig
> index d735284..a781287 100644
> --- a/arch/arm/mach-omap/Kconfig
> +++ b/arch/arm/mach-omap/Kconfig
> @@ -91,6 +91,13 @@ config OMAP_BUILD_IFT
> prompt "build ift binary"
> bool
>
> +config OMAP_BUILD_SPI
> + prompt "build SPI binary"
> + bool
> + help
> + Say Y here if you want to build an barebox.spi image as used
> + on the AM35xx chips when booting form SPI NOR flash.
> +
> config ARCH_TEXT_BASE
> hex
> default 0x80e80000 if MACH_OMAP343xSDP
> diff --git a/scripts/.gitignore b/scripts/.gitignore
> index 6e63f85..3f1cbdb 100644
> --- a/scripts/.gitignore
> +++ b/scripts/.gitignore
> @@ -2,6 +2,7 @@ bareboxenv
> bin2c
> gen_netx_image
> kallsyms
> +mk-am35xx-spi-image
> mkimage
> mkublheader
> omap_signGP
> diff --git a/scripts/Makefile b/scripts/Makefile
> index 7ca5e29..55ccdac 100644
> --- a/scripts/Makefile
> +++ b/scripts/Makefile
> @@ -9,7 +9,7 @@ hostprogs-y += bin2c
> hostprogs-y += mkimage
> hostprogs-y += bareboxenv
> hostprogs-$(CONFIG_ARCH_NETX) += gen_netx_image
> -hostprogs-$(CONFIG_ARCH_OMAP) += omap_signGP
> +hostprogs-$(CONFIG_ARCH_OMAP) += omap_signGP mk-am35xx-spi-image
> hostprogs-$(CONFIG_ARCH_S5PCxx) += s5p_cksum
> hostprogs-$(CONFIG_ARCH_DAVINCI) += mkublheader
>
> diff --git a/scripts/mk-am35xx-spi-image.c b/scripts/mk-am35xx-spi-image.c
> new file mode 100644
> index 0000000..133f2b7
> --- /dev/null
> +++ b/scripts/mk-am35xx-spi-image.c
> @@ -0,0 +1,126 @@
> +/*
> + * mkublheader.c - produce the header needed to load barebox on OMAP-L138
We already have scripts/mkublheader.c:
/*
* mkublheader.c - produce the header needed to load barebox on OMAP-L138
*/
This indeed seems to be a different tool. Can we clarify this a bit,
maybe by adding the purpose of the different tools to the header?
Sascha
--
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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http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 24+ messages in thread
* [PATCH 05/10] common: split out meminfo output and make it optional
2012-09-03 11:45 Prepare support for TI AM35xx Jan Luebbe
` (3 preceding siblings ...)
2012-09-03 11:45 ` [PATCH 04/10] scripts: add tool to create image for SPI boot on AM35xx Jan Luebbe
@ 2012-09-03 11:46 ` Jan Luebbe
2012-09-03 11:46 ` [PATCH 06/10] omap: add SPI as a boot mode for xload Jan Luebbe
` (4 subsequent siblings)
9 siblings, 0 replies; 24+ messages in thread
From: Jan Luebbe @ 2012-09-03 11:46 UTC (permalink / raw)
To: barebox
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
---
common/Kconfig | 4 ++++
common/Makefile | 1 +
common/meminfo.c | 23 +++++++++++++++++++++++
common/startup.c | 21 ---------------------
include/common.h | 4 ++--
5 files changed, 30 insertions(+), 23 deletions(-)
create mode 100644 common/meminfo.c
diff --git a/common/Kconfig b/common/Kconfig
index 7eb5b49..ba8ccf5 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -96,6 +96,10 @@ config BANNER
bool "display banner"
default y
+config MEMINFO
+ bool "display memory info"
+ default y
+
config ENVIRONMENT_VARIABLES
bool "environment variables support"
diff --git a/common/Makefile b/common/Makefile
index d74dffb..5d3ef4b 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_MALLOC_TLSF) += tlsf.o
obj-$(CONFIG_MALLOC_DUMMY) += dummy_malloc.o
obj-y += clock.o
obj-$(CONFIG_BANNER) += version.o
+obj-$(CONFIG_MEMINFO) += meminfo.o
obj-$(CONFIG_COMMAND_SUPPORT) += command.o
obj-$(CONFIG_CONSOLE_FULL) += console.o
obj-$(CONFIG_CONSOLE_SIMPLE) += console_simple.o
diff --git a/common/meminfo.c b/common/meminfo.c
new file mode 100644
index 0000000..06fce5a
--- /dev/null
+++ b/common/meminfo.c
@@ -0,0 +1,23 @@
+#include <common.h>
+#include <init.h>
+#include <memory.h>
+#include <asm-generic/memory_layout.h>
+
+static int display_meminfo(void)
+{
+ ulong mstart = mem_malloc_start();
+ ulong mend = mem_malloc_end();
+ ulong msize = mend - mstart + 1;
+
+ debug("barebox code: 0x%p -> 0x%p\n", _stext, _etext);
+ debug("bss segment: 0x%p -> 0x%p\n", __bss_start, __bss_stop);
+ printf("malloc space: 0x%08lx -> 0x%08lx (size %s)\n",
+ mstart, mend, size_human_readable(msize));
+#ifdef CONFIG_ARM
+ printf("stack space: 0x%08x -> 0x%08x (size %s)\n",
+ STACK_BASE, STACK_BASE + STACK_SIZE,
+ size_human_readable(STACK_SIZE));
+#endif
+ return 0;
+}
+late_initcall(display_meminfo);
diff --git a/common/startup.c b/common/startup.c
index abd1b77..e639d05 100644
--- a/common/startup.c
+++ b/common/startup.c
@@ -33,34 +33,15 @@
#include <init.h>
#include <command.h>
#include <malloc.h>
-#include <memory.h>
#include <debug_ll.h>
#include <fs.h>
#include <linux/stat.h>
#include <environment.h>
-#include <asm-generic/memory_layout.h>
#include <asm/sections.h>
extern initcall_t __barebox_initcalls_start[], __barebox_early_initcalls_end[],
__barebox_initcalls_end[];
-static void display_meminfo(void)
-{
- ulong mstart = mem_malloc_start();
- ulong mend = mem_malloc_end();
- ulong msize = mend - mstart + 1;
-
- debug("barebox code: 0x%p -> 0x%p\n", _stext, _etext);
- debug("bss segment: 0x%p -> 0x%p\n", __bss_start, __bss_stop);
- printf("Malloc space: 0x%08lx -> 0x%08lx (size %s)\n",
- mstart, mend, size_human_readable(msize));
-#ifdef CONFIG_ARM
- printf("Stack space : 0x%08x -> 0x%08x (size %s)\n",
- STACK_BASE, STACK_BASE + STACK_SIZE,
- size_human_readable(STACK_SIZE));
-#endif
-}
-
#ifdef CONFIG_DEFAULT_ENVIRONMENT
#include <generated/barebox_default_env.h>
@@ -128,8 +109,6 @@ void start_barebox (void)
debug("initcalls done\n");
- display_meminfo();
-
#ifdef CONFIG_ENV_HANDLING
if (envfs_load(default_environment_path, "/env")) {
#ifdef CONFIG_DEFAULT_ENVIRONMENT
diff --git a/include/common.h b/include/common.h
index df12083..30c1dc6 100644
--- a/include/common.h
+++ b/include/common.h
@@ -150,11 +150,11 @@ static inline void dump_stack(void)
#define MEMAREA_SIZE_SPECIFIED 1
struct memarea_info {
- struct device_d *device;
+ struct device_d *device;
unsigned long start;
unsigned long end;
unsigned long size;
- unsigned long flags;
+ unsigned long flags;
};
int parse_area_spec(const char *str, loff_t *start, loff_t *size);
--
1.7.10.4
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^ permalink raw reply [flat|nested] 24+ messages in thread* [PATCH 06/10] omap: add SPI as a boot mode for xload
2012-09-03 11:45 Prepare support for TI AM35xx Jan Luebbe
` (4 preceding siblings ...)
2012-09-03 11:46 ` [PATCH 05/10] common: split out meminfo output and make it optional Jan Luebbe
@ 2012-09-03 11:46 ` Jan Luebbe
2012-09-03 16:24 ` Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 11:46 ` [PATCH 07/10] drivers/net/ksz8864rmn: add driver for Micrel KSZ8864RMN Ethernet Switch Jan Luebbe
` (3 subsequent siblings)
9 siblings, 1 reply; 24+ messages in thread
From: Jan Luebbe @ 2012-09-03 11:46 UTC (permalink / raw)
To: barebox
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
---
arch/arm/mach-omap/include/mach/xload.h | 1 +
arch/arm/mach-omap/xload.c | 27 +++++++++++++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/arch/arm/mach-omap/include/mach/xload.h b/arch/arm/mach-omap/include/mach/xload.h
index 844b57f..c62912a 100644
--- a/arch/arm/mach-omap/include/mach/xload.h
+++ b/arch/arm/mach-omap/include/mach/xload.h
@@ -8,6 +8,7 @@ enum omap_boot_src {
OMAP_BOOTSRC_UNKNOWN,
OMAP_BOOTSRC_MMC1,
OMAP_BOOTSRC_NAND,
+ OMAP_BOOTSRC_SPI1,
};
enum omap_boot_src omap3_bootsrc(void);
diff --git a/arch/arm/mach-omap/xload.c b/arch/arm/mach-omap/xload.c
index 13024ab..1daa827 100644
--- a/arch/arm/mach-omap/xload.c
+++ b/arch/arm/mach-omap/xload.c
@@ -54,6 +54,29 @@ void *omap_xload_boot_mmc(void)
return buf;
}
+void *omap_xload_boot_spi(int offset, int size)
+{
+ int ret;
+ void *to = xmalloc(size);
+ struct cdev *cdev;
+
+ devfs_add_partition("m25p0", offset, size, DEVFS_PARTITION_FIXED, "x");
+
+ cdev = cdev_open("x", O_RDONLY);
+ if (!cdev) {
+ printf("failed to open spi flash\n");
+ return NULL;
+ }
+
+ ret = cdev_read(cdev, to, size, 0, 0);
+ if (ret != size) {
+ printf("failed to read from spi flash\n");
+ return NULL;
+ }
+
+ return to;
+}
+
enum omap_boot_src omap_bootsrc(void)
{
#if defined(CONFIG_ARCH_OMAP3)
@@ -82,6 +105,10 @@ int run_shell(void)
printf("booting from NAND\n");
func = omap_xload_boot_nand(SZ_128K, SZ_256K);
break;
+ case OMAP_BOOTSRC_SPI1:
+ printf("booting from SPI1\n");
+ func = omap_xload_boot_spi(SZ_128K, SZ_512K);
+ break;
}
if (!func) {
--
1.7.10.4
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^ permalink raw reply [flat|nested] 24+ messages in thread* [PATCH 07/10] drivers/net/ksz8864rmn: add driver for Micrel KSZ8864RMN Ethernet Switch
2012-09-03 11:45 Prepare support for TI AM35xx Jan Luebbe
` (5 preceding siblings ...)
2012-09-03 11:46 ` [PATCH 06/10] omap: add SPI as a boot mode for xload Jan Luebbe
@ 2012-09-03 11:46 ` Jan Luebbe
2012-09-03 11:46 ` [PATCH 08/10] drivers/net: add driver for the EMAC device found in some TI SoCs Jan Luebbe
` (2 subsequent siblings)
9 siblings, 0 replies; 24+ messages in thread
From: Jan Luebbe @ 2012-09-03 11:46 UTC (permalink / raw)
To: barebox
It start the switch and provides basic access to the registers.
This driver could also work with some other Micrel switches, possibly
with some small changes.
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
---
drivers/net/Kconfig | 7 ++
drivers/net/Makefile | 1 +
drivers/net/ksz8864rmn.c | 233 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 241 insertions(+)
create mode 100644 drivers/net/ksz8864rmn.c
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 749ea6a..0fa4f14 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -126,5 +126,12 @@ config DRIVER_NET_DESIGNWARE_ALTDESCRIPTOR
source "drivers/net/usb/Kconfig"
+config DRIVER_NET_MICREL
+ depends on SPI
+ bool "Micrel KSZ8864RMN Ethernet Switch driver"
+ help
+ This option enables support for enabling the Micrel
+ KSZ8864RMN Ethernet Switch over SPI.
+
endmenu
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 29727b7..b589240 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -14,3 +14,4 @@ obj-$(CONFIG_NET_USB) += usb/
obj-$(CONFIG_DRIVER_NET_TSE) += altera_tse.o
obj-$(CONFIG_DRIVER_NET_KS8851_MLL) += ks8851_mll.o
obj-$(CONFIG_DRIVER_NET_DESIGNWARE) += designware.o
+obj-$(CONFIG_DRIVER_NET_MICREL) += ksz8864rmn.o
diff --git a/drivers/net/ksz8864rmn.c b/drivers/net/ksz8864rmn.c
new file mode 100644
index 0000000..5851463
--- /dev/null
+++ b/drivers/net/ksz8864rmn.c
@@ -0,0 +1,233 @@
+/*
+ * Copyright (C) 2012 Jan Luebbe, Pengutronix
+ *
+ * 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 <common.h>
+#include <init.h>
+#include <driver.h>
+#include <spi/spi.h>
+#include <errno.h>
+
+#define REG_ID0 0x00
+#define REG_ID1 0x01
+
+#define REG_GC00 0x02
+#define REG_GC01 0x03
+#define REG_GC02 0x04
+#define REG_GC03 0x05
+#define REG_GC04 0x06
+#define REG_GC05 0x07
+#define REG_GC06 0x08
+#define REG_GC07 0x09
+#define REG_GC08 0x0a
+#define REG_GC09 0x0b
+#define REG_GC10 0x0c
+#define REG_GC11 0x0d
+
+#define REG_PSTAT1(p) (0x10 * p + 0xe)
+#define REG_PSTAT2(p) (0x10 * p + 0xf)
+
+#define CMD_WRITE 0x02
+#define CMD_READ 0x03
+
+struct micrel_switch_priv {
+ struct cdev cdev;
+ struct spi_device *spi;
+};
+
+static int micrel_switch_read_reg(struct spi_device *spi, uint8_t reg)
+{
+ uint8_t tx[2];
+ uint8_t rx[1];
+ int ret;
+
+ tx[0] = CMD_READ;
+ tx[1] = reg;
+
+ ret = spi_write_then_read(spi, tx, 2, rx, 1);
+ if (ret < 0)
+ return ret;
+
+ return rx[0];
+}
+
+static void micrel_switch_write_reg(struct spi_device *spi, uint8_t reg, uint8_t val)
+{
+ uint8_t tx[3];
+
+ tx[0] = CMD_WRITE;
+ tx[1] = reg;
+ tx[2] = val;
+
+ spi_write_then_read(spi, tx, 3, NULL, 0);
+}
+
+static int micrel_switch_enable_set(struct device_d *dev, struct param_d *param,
+ const char *val)
+{
+ struct spi_device *spi = (struct spi_device *)dev->type_data;
+ int enable;
+ char *new;
+
+ if (!val)
+ return dev_param_set_generic(dev, param, NULL);
+
+ enable = simple_strtoul(val, NULL, 0);
+
+ if (enable) {
+ micrel_switch_write_reg(spi, REG_ID1, 1);
+ new = "1";
+ } else {
+ micrel_switch_write_reg(spi, REG_ID1, 0);
+ new = "0";
+ }
+
+ dev_param_set_generic(dev, param, new);
+
+ return 0;
+}
+
+static void micrel_switch_print_reg(struct spi_device *spi, const char *name, uint8_t reg)
+{
+ uint8_t tx[2];
+ uint8_t rx[1];
+ int ret;
+
+ tx[0] = CMD_READ;
+ tx[1] = reg;
+
+ ret = spi_write_then_read(spi, tx, 2, rx, 1);
+ if (ret < 0)
+ printf("%s@0x%02x: SPI error\n", name, reg);
+
+ printf("%s@0x%02x: 0x%02x\n", name, reg, rx[0]);
+}
+
+static void micrel_switch_info(struct device_d *dev)
+{
+ struct spi_device *spi = (struct spi_device *)dev->type_data;
+
+ printf("Registers:\n");
+ micrel_switch_print_reg(spi, " Chip ID 0", REG_ID0);
+ micrel_switch_print_reg(spi, " Chip ID 1", REG_ID1);
+ micrel_switch_print_reg(spi, " Global Control 0", REG_GC00);
+ micrel_switch_print_reg(spi, " Global Control 1", REG_GC01);
+ micrel_switch_print_reg(spi, " Global Control 2", REG_GC02);
+ micrel_switch_print_reg(spi, " Global Control 3", REG_GC03);
+ micrel_switch_print_reg(spi, " Global Control 4", REG_GC04);
+ micrel_switch_print_reg(spi, " Global Control 5", REG_GC05);
+ micrel_switch_print_reg(spi, " Global Control 6", REG_GC06);
+ micrel_switch_print_reg(spi, " Global Control 7", REG_GC07);
+ micrel_switch_print_reg(spi, " Global Control 8", REG_GC08);
+ micrel_switch_print_reg(spi, " Global Control 9", REG_GC09);
+ micrel_switch_print_reg(spi, " Global Control 10", REG_GC10);
+ micrel_switch_print_reg(spi, " Global Control 11", REG_GC11);
+ micrel_switch_print_reg(spi, " Port 1 Status 1", REG_PSTAT1(1));
+ micrel_switch_print_reg(spi, " Port 1 Status 2", REG_PSTAT2(1));
+ micrel_switch_print_reg(spi, " Port 2 Status 1", REG_PSTAT1(2));
+ micrel_switch_print_reg(spi, " Port 2 Status 2", REG_PSTAT2(2));
+}
+
+static ssize_t micel_switch_read(struct cdev *cdev, void *_buf, size_t count, loff_t offset, ulong flags)
+{
+ int i, ret;
+ uint8_t *buf = _buf;
+ struct micrel_switch_priv *priv = cdev->priv;
+
+ for (i = 0; i < count; i++) {
+ ret = micrel_switch_read_reg(priv->spi, offset);
+ if (ret < 0)
+ return ret;
+ *buf = ret;
+ buf++;
+ offset++;
+ }
+
+ return count;
+}
+
+static ssize_t micel_switch_write(struct cdev *cdev, const void *_buf, size_t count, loff_t offset, ulong flags)
+{
+ int i;
+ const uint8_t *buf = _buf;
+ struct micrel_switch_priv *priv = cdev->priv;
+
+ for (i = 0; i < count; i++) {
+ micrel_switch_write_reg(priv->spi, offset, *buf);
+ buf++;
+ offset++;
+ }
+
+ return count;
+}
+
+static struct file_operations micrel_switch_ops = {
+ .read = micel_switch_read,
+ .write = micel_switch_write,
+ .lseek = dev_lseek_default,
+};
+
+static int micrel_switch_probe(struct device_d *dev)
+{
+ struct micrel_switch_priv *priv;
+ int ret = 0;
+
+ priv = xzalloc(sizeof(*priv));
+
+ dev->priv = priv;
+
+ priv->spi = (struct spi_device *)dev->type_data;
+ priv->spi->mode = SPI_MODE_0;
+ priv->spi->bits_per_word = 8;
+
+ ret = micrel_switch_read_reg(priv->spi, REG_ID0);
+ if (ret < 0) {
+ dev_err(&priv->spi->dev, "failed to read device id\n");
+ return ret;
+ }
+ if (ret != 0x95) {
+ dev_err(&priv->spi->dev, "unknown device id: %02x\n", ret);
+ return -ENODEV;
+ }
+
+ priv->cdev.name = asprintf("switch%d", dev->id);
+ priv->cdev.size = 256;
+ priv->cdev.ops = &micrel_switch_ops;
+ priv->cdev.priv = priv;
+ priv->cdev.dev = dev;
+ devfs_create(&priv->cdev);
+
+ dev_add_param(dev, "enable", micrel_switch_enable_set, NULL, 0);
+ dev_set_param(dev, "enable", "1");
+
+ return 0;
+}
+
+static struct driver_d micrel_switch_driver = {
+ .name = "ksz8864rmn",
+ .probe = micrel_switch_probe,
+ .info = micrel_switch_info,
+};
+
+static int micrel_switch_init(void)
+{
+ register_driver(&micrel_switch_driver);
+ return 0;
+}
+device_initcall(micrel_switch_init);
--
1.7.10.4
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^ permalink raw reply [flat|nested] 24+ messages in thread* [PATCH 08/10] drivers/net: add driver for the EMAC device found in some TI SoCs
2012-09-03 11:45 Prepare support for TI AM35xx Jan Luebbe
` (6 preceding siblings ...)
2012-09-03 11:46 ` [PATCH 07/10] drivers/net/ksz8864rmn: add driver for Micrel KSZ8864RMN Ethernet Switch Jan Luebbe
@ 2012-09-03 11:46 ` Jan Luebbe
2012-09-03 16:27 ` Jean-Christophe PLAGNIOL-VILLARD
2012-09-04 8:42 ` Sascha Hauer
2012-09-03 11:46 ` [PATCH 09/10] omap3: allow enabling clocks for UART3, MMC1 and SPI Jan Luebbe
2012-09-03 11:46 ` [PATCH 10/10] drivers/spi: add driver for the Multichannel SPI controller found in TI SoCs Jan Luebbe
9 siblings, 2 replies; 24+ messages in thread
From: Jan Luebbe @ 2012-09-03 11:46 UTC (permalink / raw)
To: barebox
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
---
arch/arm/mach-omap/include/mach/emac_defs.h | 53 +++
drivers/net/Kconfig | 5 +
drivers/net/Makefile | 1 +
drivers/net/davinci_emac.c | 619 +++++++++++++++++++++++++++
drivers/net/davinci_emac.h | 331 ++++++++++++++
5 files changed, 1009 insertions(+)
create mode 100644 arch/arm/mach-omap/include/mach/emac_defs.h
create mode 100644 drivers/net/davinci_emac.c
create mode 100644 drivers/net/davinci_emac.h
diff --git a/arch/arm/mach-omap/include/mach/emac_defs.h b/arch/arm/mach-omap/include/mach/emac_defs.h
new file mode 100644
index 0000000..ef930fc
--- /dev/null
+++ b/arch/arm/mach-omap/include/mach/emac_defs.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ *
+ * Based on:
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * dm644x_emac.h
+ *
+ * TI DaVinci (DM644X) EMAC peripheral driver header for DV-EVM
+ *
+ * Copyright (C) 2005 Texas Instruments.
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * ----------------------------------------------------------------------------
+
+ * Modifications:
+ * ver. 1.0: Sep 2005, TI PSP Team - Created EMAC version for uBoot.
+ *
+ */
+
+#ifndef _AM3517_EMAC_H_
+#define _AM3517_EMAC_H_
+
+#define EMAC_BASE_ADDR 0x5C010000
+#define EMAC_WRAPPER_BASE_ADDR 0x5C000000
+#define EMAC_WRAPPER_RAM_ADDR 0x5C020000
+#define EMAC_MDIO_BASE_ADDR 0x5C030000
+#define EMAC_HW_RAM_ADDR 0x01E20000
+
+#define EMAC_MDIO_BUS_FREQ 166000000 /* 166 MHZ check */
+#define EMAC_MDIO_CLOCK_FREQ 1000000 /* 2.0 MHz */
+
+/* SOFTRESET macro definition interferes with emac_regs structure definition */
+#undef SOFTRESET
+
+#define DAVINCI_EMAC_VERSION2
+
+#endif /* _AM3517_EMAC_H_ */
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 0fa4f14..68c11eb 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -49,6 +49,11 @@ config DRIVER_NET_SMC91111
This option enables support for the SMSC LAN91C111
ethernet chip.
+config DRIVER_NET_DAVINCI_EMAC
+ bool "TI Davinci/OMAP EMAC ethernet driver"
+ depends on ARCH_DAVINCI || ARCH_OMAP3
+ select MIIDEV
+
config DRIVER_NET_DM9K
bool "Davicom dm9k[E|A|B] ethernet driver"
depends on HAS_DM9000
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index b589240..0f1363f 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -1,6 +1,7 @@
obj-$(CONFIG_DRIVER_NET_CS8900) += cs8900.o
obj-$(CONFIG_DRIVER_NET_SMC911X) += smc911x.o
obj-$(CONFIG_DRIVER_NET_SMC91111) += smc91111.o
+obj-$(CONFIG_DRIVER_NET_DAVINCI_EMAC) += davinci_emac.o
obj-$(CONFIG_DRIVER_NET_DM9K) += dm9k.o
obj-$(CONFIG_DRIVER_NET_NETX) += netx_eth.o
obj-$(CONFIG_DRIVER_NET_AT91_ETHER) += at91_ether.o
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
new file mode 100644
index 0000000..b9670ca
--- /dev/null
+++ b/drivers/net/davinci_emac.c
@@ -0,0 +1,619 @@
+/*
+ * Copyright (C) 2012 Jan Luebbe <j.luebbe@pengutronix.de>
+ *
+ * Ethernet driver for TI TMS320DM644x (DaVinci) chips.
+ *
+ * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ *
+ * Parts shamelessly stolen from TI's dm644x_emac.c. Original copyright
+ * follows:
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * dm644x_emac.c
+ *
+ * TI DaVinci (DM644X) EMAC peripheral driver source for DV-EVM
+ *
+ * Copyright (C) 2005 Texas Instruments.
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * ----------------------------------------------------------------------------
+
+ * Modifications:
+ * ver. 1.0: Sep 2005, Anant Gole - Created EMAC version for uBoot.
+ * ver 1.1: Nov 2005, Anant Gole - Extended the RX logic for multiple descriptors
+ *
+ */
+
+#include <common.h>
+#include <io.h>
+#include <clock.h>
+#include <net.h>
+#include <miidev.h>
+#include <malloc.h>
+#include <init.h>
+#include <asm/mmu.h>
+#include <asm/system.h>
+#include <mach/emac_defs.h>
+#include "davinci_emac.h"
+
+struct davinci_emac_priv {
+ struct device_d *dev;
+ struct eth_device edev;
+ struct mii_device miidev;
+ void __iomem *regs;
+
+ /* EMAC Addresses */
+ emac_regs *adap_emac; /* = (emac_regs *)EMAC_BASE_ADDR; */
+ ewrap_regs *adap_ewrap; /* = (ewrap_regs *)EMAC_WRAPPER_BASE_ADDR; */
+ mdio_regs *adap_mdio; /* = (mdio_regs *)EMAC_MDIO_BASE_ADDR; */
+
+ /* EMAC descriptors */
+ emac_desc *emac_rx_desc; /* = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_RX_DESC_BASE); */
+ emac_desc *emac_tx_desc; /* = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_TX_DESC_BASE); */
+ emac_desc *emac_rx_active_head; /* = 0; */
+ emac_desc *emac_rx_active_tail; /* = 0; */
+ int emac_rx_queue_active; /* = 0; */
+
+ /* Receive packet buffers */
+ unsigned char *emac_rx_buffers; /* [EMAC_MAX_RX_BUFFERS * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN)]; */
+
+ /* PHY address for a discovered PHY (0xff - not found) */
+ u_int8_t active_phy_addr; /* = 0xff; */
+};
+
+/* davinci_eth_mac_addr[0] goes out on the wire first */
+
+static u_int8_t davinci_eth_mac_addr[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0x00 };
+
+/*
+ * This function must be called before emac_open() if you want to override
+ * the default mac address.
+ */
+void davinci_eth_set_mac_addr(const u_int8_t *addr)
+{
+ int i;
+
+ for (i = 0; i < sizeof(davinci_eth_mac_addr); i++)
+ davinci_eth_mac_addr[i] = addr[i];
+}
+
+#ifdef EMAC_HW_RAM_ADDR
+static inline dv_reg BD_TO_HW(emac_desc *x)
+{
+ if (x == 0)
+ return 0;
+
+ return (dv_reg)(x) - EMAC_WRAPPER_RAM_ADDR + EMAC_HW_RAM_ADDR;
+}
+
+static inline emac_desc* HW_TO_BD(dv_reg x)
+{
+ if (x == 0)
+ return 0;
+
+ return (emac_desc*)(x - EMAC_HW_RAM_ADDR + EMAC_WRAPPER_RAM_ADDR);
+}
+#else
+#define BD_TO_HW(x) (x)
+#define HW_TO_BD(x) (x)
+#endif
+
+static void davinci_eth_mdio_enable(struct davinci_emac_priv *priv)
+{
+ u_int32_t clkdiv;
+
+ clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
+
+ dev_dbg(priv->dev, "mdio_enable + 0x%08x\n", priv->adap_mdio->CONTROL);
+ writel((clkdiv & 0xff) |
+ MDIO_CONTROL_ENABLE |
+ MDIO_CONTROL_FAULT |
+ MDIO_CONTROL_FAULT_ENABLE,
+ &priv->adap_mdio->CONTROL);
+ dev_dbg(priv->dev, "mdio_enable - 0x%08x\n", priv->adap_mdio->CONTROL);
+
+ while (readl(&priv->adap_mdio->CONTROL) & MDIO_CONTROL_IDLE);
+}
+
+/* Read a PHY register via MDIO inteface. Returns 1 on success, 0 otherwise */
+int davinci_eth_phy_read(struct davinci_emac_priv *priv, u_int8_t phy_addr, u_int8_t reg_num, u_int16_t *data)
+{
+ int tmp;
+
+ while (readl(&priv->adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO);
+
+ writel(MDIO_USERACCESS0_GO |
+ MDIO_USERACCESS0_WRITE_READ |
+ ((reg_num & 0x1f) << 21) |
+ ((phy_addr & 0x1f) << 16),
+ &priv->adap_mdio->USERACCESS0);
+
+ /* Wait for command to complete */
+ while ((tmp = readl(&priv->adap_mdio->USERACCESS0)) & MDIO_USERACCESS0_GO);
+
+ if (tmp & MDIO_USERACCESS0_ACK) {
+ *data = tmp & 0xffff;
+ dev_dbg(priv->dev, "emac_phy_read: addr=0x%02x reg=0x%02x data=0x%04x\n",
+ phy_addr, reg_num, *data);
+ return 1;
+ }
+
+ *data = -1;
+ return 0;
+}
+
+/* Write to a PHY register via MDIO inteface. Blocks until operation is complete. */
+int davinci_eth_phy_write(struct davinci_emac_priv *priv, u_int8_t phy_addr, u_int8_t reg_num, u_int16_t data)
+{
+
+ while (readl(&priv->adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO);
+
+ dev_dbg(priv->dev, "emac_phy_write: addr=0x%02x reg=0x%02x data=0x%04x\n",
+ phy_addr, reg_num, data);
+ writel(MDIO_USERACCESS0_GO |
+ MDIO_USERACCESS0_WRITE_WRITE |
+ ((reg_num & 0x1f) << 21) |
+ ((phy_addr & 0x1f) << 16) |
+ (data & 0xffff),
+ &priv->adap_mdio->USERACCESS0);
+
+ /* Wait for command to complete */
+ while (readl(&priv->adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO);
+
+ return 1;
+}
+
+static int davinci_miidev_read(struct mii_device *dev, int addr, int reg)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)dev->edev->priv;
+ uint16_t value = 0;
+ return davinci_eth_phy_read(priv, addr, reg, &value) ? value : -1;
+}
+
+static int davinci_miidev_write(struct mii_device *dev, int addr, int reg, int value)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)dev->edev->priv;
+ return davinci_eth_phy_write(priv, addr, reg, value) ? 0 : -1;
+}
+
+static int davinci_emac_get_ethaddr(struct eth_device *edev, unsigned char *adr)
+{
+ return -1;
+}
+
+static int davinci_emac_set_ethaddr(struct eth_device *edev, unsigned char *adr)
+{
+ davinci_eth_set_mac_addr(adr);
+ return 0;
+}
+
+static int davinci_emac_init(struct eth_device *edev)
+{
+ dev_dbg(&edev->dev, "* emac_init\n");
+ return 0;
+}
+
+static int davinci_emac_open(struct eth_device *edev)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
+
+ dv_reg_p addr;
+ u_int32_t clkdiv, cnt;
+ emac_desc *rx_desc;
+ unsigned long mac_hi, mac_lo;
+ int ret;
+
+ dev_dbg(priv->dev, "+ emac_open\n");
+
+ dev_dbg(priv->dev, "emac->TXIDVER: 0x%08x\n", priv->adap_emac->TXIDVER);
+ dev_dbg(priv->dev, "emac->RXIDVER: 0x%08x\n", priv->adap_emac->RXIDVER);
+
+ /* Reset EMAC module and disable interrupts in wrapper */
+ writel(1, &priv->adap_emac->SOFTRESET);
+ while (readl(&priv->adap_emac->SOFTRESET) != 0);
+ writel(1, &priv->adap_ewrap->softrst);
+ while (readl(&priv->adap_ewrap->softrst) != 0);
+
+ writel(0, &priv->adap_ewrap->c0rxen);
+ writel(0, &priv->adap_ewrap->c1rxen);
+ writel(0, &priv->adap_ewrap->c2rxen);
+ writel(0, &priv->adap_ewrap->c0txen);
+ writel(0, &priv->adap_ewrap->c1txen);
+ writel(0, &priv->adap_ewrap->c2txen);
+ writel(0, &priv->adap_ewrap->c0miscen);
+ writel(0, &priv->adap_ewrap->c1miscen);
+ writel(0, &priv->adap_ewrap->c2miscen);
+
+ rx_desc = priv->emac_rx_desc;
+
+ /*
+ * Set MAC Addresses & Init multicast Hash to 0 (disable any multicast
+ * receive)
+ * Use channel 0 only - other channels are disabled
+ */
+ writel(0, &priv->adap_emac->MACINDEX);
+ mac_hi = (davinci_eth_mac_addr[3] << 24) |
+ (davinci_eth_mac_addr[2] << 16) |
+ (davinci_eth_mac_addr[1] << 8) |
+ (davinci_eth_mac_addr[0]);
+ mac_lo = (davinci_eth_mac_addr[5] << 8) |
+ (davinci_eth_mac_addr[4]);
+
+ writel(mac_hi, &priv->adap_emac->MACADDRHI);
+ writel(mac_lo | EMAC_MAC_ADDR_IS_VALID | EMAC_MAC_ADDR_MATCH,
+ &priv->adap_emac->MACADDRLO);
+
+ /* Set source MAC address - REQUIRED */
+ writel(mac_hi, &priv->adap_emac->MACSRCADDRHI);
+ writel(mac_lo, &priv->adap_emac->MACSRCADDRLO);
+
+ /* Set DMA 8 TX / 8 RX Head pointers to 0 */
+ addr = &priv->adap_emac->TX0HDP;
+ for(cnt = 0; cnt < 16; cnt++)
+ *addr++ = 0;
+
+ addr = &priv->adap_emac->RX0HDP;
+ for(cnt = 0; cnt < 16; cnt++)
+ *addr++ = 0;
+
+ /* Clear Statistics (do this before setting MacControl register) */
+ addr = &priv->adap_emac->RXGOODFRAMES;
+ for(cnt = 0; cnt < EMAC_NUM_STATS; cnt++)
+ *addr++ = 0;
+
+ /* No multicast addressing */
+ writel(0, &priv->adap_emac->MACHASH1);
+ writel(0, &priv->adap_emac->MACHASH2);
+
+ writel(0x01, &priv->adap_emac->TXCONTROL);
+ writel(0x01, &priv->adap_emac->RXCONTROL);
+
+ /* Create RX queue and set receive process in place */
+ priv->emac_rx_active_head = priv->emac_rx_desc;
+ for (cnt = 0; cnt < EMAC_MAX_RX_BUFFERS; cnt++) {
+ rx_desc->next = BD_TO_HW(rx_desc + 1);
+ rx_desc->buffer = &priv->emac_rx_buffers[cnt * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN)];
+ rx_desc->buff_off_len = EMAC_MAX_ETHERNET_PKT_SIZE;
+ rx_desc->pkt_flag_len = EMAC_CPPI_OWNERSHIP_BIT;
+ rx_desc++;
+ }
+
+ /* Set the last descriptor's "next" parameter to 0 to end the RX desc list */
+ rx_desc--;
+ rx_desc->next = 0;
+ priv->emac_rx_active_tail = rx_desc;
+ priv->emac_rx_queue_active = 1;
+
+ /* Enable TX/RX */
+ writel(EMAC_MAX_ETHERNET_PKT_SIZE, &priv->adap_emac->RXMAXLEN);
+ writel(0, &priv->adap_emac->RXBUFFEROFFSET);
+
+ /* No fancy configs - Use this for promiscous for debug - EMAC_RXMBPENABLE_RXCAFEN_ENABLE */
+ writel(EMAC_RXMBPENABLE_RXBROADEN, &priv->adap_emac->RXMBPENABLE);
+
+ /* Enable ch 0 only */
+ writel(0x01, &priv->adap_emac->RXUNICASTSET);
+
+ /* Enable MII interface and full duplex mode (using RMMI) */
+ writel((EMAC_MACCONTROL_MIIEN_ENABLE |
+ EMAC_MACCONTROL_FULLDUPLEX_ENABLE |
+ EMAC_MACCONTROL_RMIISPEED_100),
+ &priv->adap_emac->MACCONTROL);
+
+ /* Init MDIO & get link state */
+ clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
+ writel((clkdiv & 0xff) | MDIO_CONTROL_ENABLE | MDIO_CONTROL_FAULT,
+ &priv->adap_mdio->CONTROL);
+
+ /* Start receive process */
+ writel(BD_TO_HW(priv->emac_rx_desc), &priv->adap_emac->RX0HDP);
+
+ ret = miidev_wait_aneg(&priv->miidev);
+ if (ret)
+ return ret;
+
+ ret = miidev_get_status(&priv->miidev);
+ if (ret < 0)
+ return ret;
+
+ miidev_print_status(&priv->miidev);
+
+ dev_dbg(priv->dev, "- emac_open\n");
+
+ return 0;
+}
+
+/* EMAC Channel Teardown */
+static void davinci_eth_ch_teardown(struct davinci_emac_priv *priv, int ch)
+{
+ dv_reg dly = 0xff;
+ dv_reg cnt;
+
+ dev_dbg(priv->dev, "+ emac_ch_teardown\n");
+
+ if (ch == EMAC_CH_TX) {
+ /* Init TX channel teardown */
+ writel(0, &priv->adap_emac->TXTEARDOWN);
+ for(cnt = 0; cnt != 0xfffffffc; cnt = readl(&priv->adap_emac->TX0CP)) {
+ /* Wait here for Tx teardown completion interrupt to occur
+ * Note: A task delay can be called here to pend rather than
+ * occupying CPU cycles - anyway it has been found that teardown
+ * takes very few cpu cycles and does not affect functionality */
+ dly--;
+ udelay(1);
+ if (dly == 0)
+ break;
+ }
+ writel(cnt, &priv->adap_emac->TX0CP);
+ writel(0, &priv->adap_emac->TX0HDP);
+ } else {
+ /* Init RX channel teardown */
+ writel(0, &priv->adap_emac->RXTEARDOWN);
+ for(cnt = 0; cnt != 0xfffffffc; cnt = readl(&priv->adap_emac->RX0CP)) {
+ /* Wait here for Rx teardown completion interrupt to occur
+ * Note: A task delay can be called here to pend rather than
+ * occupying CPU cycles - anyway it has been found that teardown
+ * takes very few cpu cycles and does not affect functionality */
+ dly--;
+ udelay(1);
+ if (dly == 0)
+ break;
+ }
+ writel(cnt, &priv->adap_emac->RX0CP);
+ writel(0, &priv->adap_emac->RX0HDP);
+ }
+
+ dev_dbg(priv->dev, "- emac_ch_teardown\n");
+}
+
+static void davinci_emac_halt(struct eth_device *edev)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
+
+ dev_dbg(priv->dev, "+ emac_halt\n");
+
+ davinci_eth_ch_teardown(priv, EMAC_CH_TX); /* TX Channel teardown */
+ davinci_eth_ch_teardown(priv, EMAC_CH_RX); /* RX Channel teardown */
+
+ /* Reset EMAC module and disable interrupts in wrapper */
+ writel(1, &priv->adap_emac->SOFTRESET);
+ writel(1, &priv->adap_ewrap->softrst);
+
+ writel(0, &priv->adap_ewrap->c0rxen);
+ writel(0, &priv->adap_ewrap->c1rxen);
+ writel(0, &priv->adap_ewrap->c2rxen);
+ writel(0, &priv->adap_ewrap->c0txen);
+ writel(0, &priv->adap_ewrap->c1txen);
+ writel(0, &priv->adap_ewrap->c2txen);
+ writel(0, &priv->adap_ewrap->c0miscen);
+ writel(0, &priv->adap_ewrap->c1miscen);
+ writel(0, &priv->adap_ewrap->c2miscen);
+
+ dev_dbg(priv->dev, "- emac_halt\n");
+}
+
+/*
+ * This function sends a single packet on the network and returns
+ * positive number (number of bytes transmitted) or negative for error
+ */
+static int davinci_emac_send(struct eth_device *edev, void *packet, int length)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
+ uint64_t start = 0;
+ int ret_status = -1;
+
+ dev_dbg(priv->dev, "+ emac_send (length %d)\n", length);
+
+ /* Check packet size and if < EMAC_MIN_ETHERNET_PKT_SIZE, pad it up */
+ if (length < EMAC_MIN_ETHERNET_PKT_SIZE) {
+ length = EMAC_MIN_ETHERNET_PKT_SIZE;
+ }
+
+ /* Populate the TX descriptor */
+ writel(0, &priv->emac_tx_desc->next);
+ writel((u_int8_t *) packet, &priv->emac_tx_desc->buffer);
+ writel((length & 0xffff), &priv->emac_tx_desc->buff_off_len);
+ writel(((length & 0xffff) | EMAC_CPPI_SOP_BIT |
+ EMAC_CPPI_OWNERSHIP_BIT |
+ EMAC_CPPI_EOP_BIT),
+ &priv->emac_tx_desc->pkt_flag_len);
+ dma_flush_range((ulong) packet, (ulong)packet + length);
+ /* Send the packet */
+ writel(BD_TO_HW(priv->emac_tx_desc), &priv->adap_emac->TX0HDP);
+
+ /* Wait for packet to complete or link down */
+ start = get_time_ns();
+ while (1) {
+ if (readl(&priv->adap_emac->TXINTSTATRAW) & 0x01) {
+ /* Acknowledge the TX descriptor */
+ writel(BD_TO_HW(priv->emac_tx_desc), &priv->adap_emac->TX0CP);
+ ret_status = length;
+ break;
+ }
+ }
+
+ dev_dbg(priv->dev, "- emac_send (ret_status %i)\n", ret_status);
+ return ret_status;
+}
+
+/*
+ * This function handles receipt of a packet from the network
+ */
+static int davinci_emac_recv(struct eth_device *edev)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
+ emac_desc *rx_curr_desc;
+ emac_desc *curr_desc;
+ emac_desc *tail_desc;
+ unsigned char *pkt;
+ int status, len, ret = -1;
+
+ dev_dbg(priv->dev, "+ emac_recv\n");
+
+ rx_curr_desc = priv->emac_rx_active_head;
+ status = readl(&rx_curr_desc->pkt_flag_len);
+ if ((rx_curr_desc) && ((status & EMAC_CPPI_OWNERSHIP_BIT) == 0)) {
+ if (status & EMAC_CPPI_RX_ERROR_FRAME) {
+ /* Error in packet - discard it and requeue desc */
+ dev_warn(priv->dev, "WARN: emac_rcv_pkt: Error in packet\n");
+ } else {
+ pkt = (unsigned char *)readl(&rx_curr_desc->buffer);
+ len = readl(&rx_curr_desc->buff_off_len) & 0xffff;
+ dev_dbg(priv->dev, "| emac_recv got packet (length %i)\n", len);
+ dma_inv_range((ulong)pkt,
+ (ulong)rx_curr_desc->buffer + len);
+ net_receive(pkt, len);
+ ret = len;
+ }
+
+ /* Ack received packet descriptor */
+ writel(BD_TO_HW(rx_curr_desc), &priv->adap_emac->RX0CP);
+ curr_desc = rx_curr_desc;
+ priv->emac_rx_active_head = HW_TO_BD(readl(&rx_curr_desc->next));
+
+ if (status & EMAC_CPPI_EOQ_BIT) {
+ if (priv->emac_rx_active_head) {
+ writel(BD_TO_HW(priv->emac_rx_active_head),
+ &priv->adap_emac->RX0HDP);
+ } else {
+ priv->emac_rx_queue_active = 0;
+ dev_info(priv->dev, "INFO:emac_rcv_packet: RX Queue not active\n");
+ }
+ }
+
+ /* Recycle RX descriptor */
+ writel(EMAC_MAX_ETHERNET_PKT_SIZE, &rx_curr_desc->buff_off_len);
+ writel(EMAC_CPPI_OWNERSHIP_BIT, &rx_curr_desc->pkt_flag_len);
+ writel(0, &rx_curr_desc->next);
+
+ if (priv->emac_rx_active_head == 0) {
+ dev_info(priv->dev, "INFO: emac_rcv_pkt: active queue head = 0\n");
+ priv->emac_rx_active_head = curr_desc;
+ priv->emac_rx_active_tail = curr_desc;
+ if (priv->emac_rx_queue_active != 0) {
+ writel(BD_TO_HW(priv->emac_rx_active_head), &priv->adap_emac->RX0HDP);
+ dev_info(priv->dev, "INFO: emac_rcv_pkt: active queue head = 0, HDP fired\n");
+ priv->emac_rx_queue_active = 1;
+ }
+ } else {
+ tail_desc = priv->emac_rx_active_tail;
+ priv->emac_rx_active_tail = curr_desc;
+ writel(BD_TO_HW(curr_desc), &tail_desc->next);
+ status = readl(&tail_desc->pkt_flag_len);
+ if (status & EMAC_CPPI_EOQ_BIT) {
+ writel(BD_TO_HW(curr_desc), &priv->adap_emac->RX0HDP);
+ status &= ~EMAC_CPPI_EOQ_BIT;
+ writel(status, &tail_desc->pkt_flag_len);
+ }
+ }
+ return ret;
+ }
+
+ dev_dbg(priv->dev, "- emac_recv\n");
+
+ return 0;
+}
+
+static int davinci_emac_probe(struct device_d *dev)
+{
+ struct davinci_emac_priv *priv;
+ int i;
+
+ dev_dbg(dev, "+ emac_probe\n");
+
+ priv = xzalloc(sizeof(*priv));
+ dev->priv = priv;
+
+ priv->dev = dev;
+
+ priv->adap_emac = (emac_regs *)EMAC_BASE_ADDR;
+ priv->adap_ewrap = (ewrap_regs *)EMAC_WRAPPER_BASE_ADDR;
+ priv->adap_mdio = (mdio_regs *)EMAC_MDIO_BASE_ADDR;
+
+ /* EMAC descriptors */
+ priv->emac_rx_desc = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_RX_DESC_BASE);
+ priv->emac_tx_desc = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_TX_DESC_BASE);
+ priv->emac_rx_active_head = 0;
+ priv->emac_rx_active_tail = 0;
+ priv->emac_rx_queue_active = 0;
+
+ /* Receive packet buffers */
+ priv->emac_rx_buffers = xmemalign(4096, EMAC_MAX_RX_BUFFERS * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN));
+
+ /* PHY address for a discovered PHY (0xff - not found) */
+ priv->active_phy_addr = 0xff;
+
+ priv->edev.priv = priv;
+ priv->edev.init = davinci_emac_init;
+ priv->edev.open = davinci_emac_open;
+ priv->edev.halt = davinci_emac_halt;
+ priv->edev.send = davinci_emac_send;
+ priv->edev.recv = davinci_emac_recv;
+ priv->edev.get_ethaddr = davinci_emac_get_ethaddr;
+ priv->edev.set_ethaddr = davinci_emac_set_ethaddr;
+ priv->edev.parent = dev;
+
+ priv->regs = dev_request_mem_region(dev, 0);
+
+ davinci_eth_mdio_enable(priv);
+
+ for (i = 0; i < 256; i++) {
+ if (priv->adap_mdio->ALIVE)
+ break;
+ udelay(1000);
+ }
+
+ if (i >= 256) {
+ dev_err(dev, "No ETH PHY detected!\n");
+ }
+
+ priv->miidev.read = davinci_miidev_read;
+ priv->miidev.write = davinci_miidev_write;
+ priv->miidev.address = 0x01;
+ priv->miidev.flags = MIIDEV_FORCE_LINK;
+ priv->miidev.edev = &priv->edev;
+ priv->miidev.parent = dev;
+
+ mii_register(&priv->miidev);
+
+ eth_register(&priv->edev);
+
+ dev_dbg(dev, "- emac_probe\n");
+ return 0;
+}
+
+static void davinci_emac_remove(struct device_d *dev)
+{
+ struct davinci_emac_priv *priv = dev->priv;
+
+ davinci_emac_halt(&priv->edev);
+}
+
+static struct driver_d davinci_emac_driver = {
+ .name = "davinci_emac",
+ .probe = davinci_emac_probe,
+ .remove = davinci_emac_remove,
+};
+
+static int davinci_emac_register(void)
+{
+ register_driver(&davinci_emac_driver);
+ return 0;
+}
+
+device_initcall(davinci_emac_register);
diff --git a/drivers/net/davinci_emac.h b/drivers/net/davinci_emac.h
new file mode 100644
index 0000000..4e97ce5
--- /dev/null
+++ b/drivers/net/davinci_emac.h
@@ -0,0 +1,331 @@
+/*
+ * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ *
+ * Based on:
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * dm644x_emac.h
+ *
+ * TI DaVinci (DM644X) EMAC peripheral driver header for DV-EVM
+ *
+ * Copyright (C) 2005 Texas Instruments.
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * ----------------------------------------------------------------------------
+
+ * Modifications:
+ * ver. 1.0: Sep 2005, TI PSP Team - Created EMAC version for uBoot.
+ *
+ */
+
+#ifndef _DAVINCI_EMAC_H_
+#define _DAVINCI_EMAC_H_
+
+/* PHY mask - set only those phy number bits where phy is/can be connected */
+#define EMAC_MDIO_PHY_NUM 1
+#define EMAC_MDIO_PHY_MASK (1 << EMAC_MDIO_PHY_NUM)
+
+/* Ethernet Min/Max packet size */
+#define EMAC_MIN_ETHERNET_PKT_SIZE 60
+#define EMAC_MAX_ETHERNET_PKT_SIZE 1518
+#define EMAC_PKT_ALIGN 18 /* 1518 + 18 = 1536 (packet aligned on 32 byte boundry) */
+
+/* Number of RX packet buffers
+ * NOTE: Only 1 buffer supported as of now
+ */
+#define EMAC_MAX_RX_BUFFERS 10
+
+typedef unsigned int dv_reg;
+typedef unsigned int *dv_reg_p;
+
+/***********************************************
+ ******** Internally used macros ***************
+ ***********************************************/
+
+#define EMAC_CH_TX 1
+#define EMAC_CH_RX 0
+
+/* Each descriptor occupies 4 words, lets start RX desc's at 0 and
+ * reserve space for 64 descriptors max
+ */
+#define EMAC_RX_DESC_BASE 0x0
+#define EMAC_TX_DESC_BASE 0x1000
+
+/* EMAC Teardown value */
+#define EMAC_TEARDOWN_VALUE 0xfffffffc
+
+/* MII Status Register */
+#define MII_STATUS_REG 1
+
+/* Number of statistics registers */
+#define EMAC_NUM_STATS 36
+
+
+/* EMAC Descriptor */
+typedef struct
+{
+ u_int32_t next; /* Pointer to next descriptor in chain */
+ u_int8_t *buffer; /* Pointer to data buffer */
+ u_int32_t buff_off_len; /* Buffer Offset(MSW) and Length(LSW) */
+ u_int32_t pkt_flag_len; /* Packet Flags(MSW) and Length(LSW) */
+} emac_desc;
+
+/* CPPI bit positions */
+#define EMAC_CPPI_SOP_BIT (0x80000000)
+#define EMAC_CPPI_EOP_BIT (0x40000000)
+#define EMAC_CPPI_OWNERSHIP_BIT (0x20000000)
+#define EMAC_CPPI_EOQ_BIT (0x10000000)
+#define EMAC_CPPI_TEARDOWN_COMPLETE_BIT (0x08000000)
+#define EMAC_CPPI_PASS_CRC_BIT (0x04000000)
+
+#define EMAC_CPPI_RX_ERROR_FRAME (0x03fc0000)
+
+#define EMAC_MACCONTROL_MIIEN_ENABLE (0x20)
+#define EMAC_MACCONTROL_FULLDUPLEX_ENABLE (0x1)
+#define EMAC_MACCONTROL_GIGABIT_ENABLE (1 << 7)
+#define EMAC_MACCONTROL_GIGFORCE (1 << 17)
+#define EMAC_MACCONTROL_RMIISPEED_100 (1 << 15)
+
+#define EMAC_MAC_ADDR_MATCH (1 << 19)
+#define EMAC_MAC_ADDR_IS_VALID (1 << 20)
+
+#define EMAC_RXMBPENABLE_RXCAFEN_ENABLE (0x200000)
+#define EMAC_RXMBPENABLE_RXBROADEN (0x2000)
+
+
+#define MDIO_CONTROL_IDLE (0x80000000)
+#define MDIO_CONTROL_ENABLE (0x40000000)
+#define MDIO_CONTROL_FAULT_ENABLE (0x40000)
+#define MDIO_CONTROL_FAULT (0x80000)
+#define MDIO_USERACCESS0_GO (0x80000000)
+#define MDIO_USERACCESS0_WRITE_READ (0x0)
+#define MDIO_USERACCESS0_WRITE_WRITE (0x40000000)
+#define MDIO_USERACCESS0_ACK (0x20000000)
+
+/* Ethernet MAC Registers Structure */
+typedef struct {
+ dv_reg TXIDVER;
+ dv_reg TXCONTROL;
+ dv_reg TXTEARDOWN;
+ u_int8_t RSVD0[4];
+ dv_reg RXIDVER;
+ dv_reg RXCONTROL;
+ dv_reg RXTEARDOWN;
+ u_int8_t RSVD1[100];
+ dv_reg TXINTSTATRAW;
+ dv_reg TXINTSTATMASKED;
+ dv_reg TXINTMASKSET;
+ dv_reg TXINTMASKCLEAR;
+ dv_reg MACINVECTOR;
+ u_int8_t RSVD2[12];
+ dv_reg RXINTSTATRAW;
+ dv_reg RXINTSTATMASKED;
+ dv_reg RXINTMASKSET;
+ dv_reg RXINTMASKCLEAR;
+ dv_reg MACINTSTATRAW;
+ dv_reg MACINTSTATMASKED;
+ dv_reg MACINTMASKSET;
+ dv_reg MACINTMASKCLEAR;
+ u_int8_t RSVD3[64];
+ dv_reg RXMBPENABLE;
+ dv_reg RXUNICASTSET;
+ dv_reg RXUNICASTCLEAR;
+ dv_reg RXMAXLEN;
+ dv_reg RXBUFFEROFFSET;
+ dv_reg RXFILTERLOWTHRESH;
+ u_int8_t RSVD4[8];
+ dv_reg RX0FLOWTHRESH;
+ dv_reg RX1FLOWTHRESH;
+ dv_reg RX2FLOWTHRESH;
+ dv_reg RX3FLOWTHRESH;
+ dv_reg RX4FLOWTHRESH;
+ dv_reg RX5FLOWTHRESH;
+ dv_reg RX6FLOWTHRESH;
+ dv_reg RX7FLOWTHRESH;
+ dv_reg RX0FREEBUFFER;
+ dv_reg RX1FREEBUFFER;
+ dv_reg RX2FREEBUFFER;
+ dv_reg RX3FREEBUFFER;
+ dv_reg RX4FREEBUFFER;
+ dv_reg RX5FREEBUFFER;
+ dv_reg RX6FREEBUFFER;
+ dv_reg RX7FREEBUFFER;
+ dv_reg MACCONTROL;
+ dv_reg MACSTATUS;
+ dv_reg EMCONTROL;
+ dv_reg FIFOCONTROL;
+ dv_reg MACCONFIG;
+ dv_reg SOFTRESET;
+ u_int8_t RSVD5[88];
+ dv_reg MACSRCADDRLO;
+ dv_reg MACSRCADDRHI;
+ dv_reg MACHASH1;
+ dv_reg MACHASH2;
+ dv_reg BOFFTEST;
+ dv_reg TPACETEST;
+ dv_reg RXPAUSE;
+ dv_reg TXPAUSE;
+ u_int8_t RSVD6[16];
+ dv_reg RXGOODFRAMES;
+ dv_reg RXBCASTFRAMES;
+ dv_reg RXMCASTFRAMES;
+ dv_reg RXPAUSEFRAMES;
+ dv_reg RXCRCERRORS;
+ dv_reg RXALIGNCODEERRORS;
+ dv_reg RXOVERSIZED;
+ dv_reg RXJABBER;
+ dv_reg RXUNDERSIZED;
+ dv_reg RXFRAGMENTS;
+ dv_reg RXFILTERED;
+ dv_reg RXQOSFILTERED;
+ dv_reg RXOCTETS;
+ dv_reg TXGOODFRAMES;
+ dv_reg TXBCASTFRAMES;
+ dv_reg TXMCASTFRAMES;
+ dv_reg TXPAUSEFRAMES;
+ dv_reg TXDEFERRED;
+ dv_reg TXCOLLISION;
+ dv_reg TXSINGLECOLL;
+ dv_reg TXMULTICOLL;
+ dv_reg TXEXCESSIVECOLL;
+ dv_reg TXLATECOLL;
+ dv_reg TXUNDERRUN;
+ dv_reg TXCARRIERSENSE;
+ dv_reg TXOCTETS;
+ dv_reg FRAME64;
+ dv_reg FRAME65T127;
+ dv_reg FRAME128T255;
+ dv_reg FRAME256T511;
+ dv_reg FRAME512T1023;
+ dv_reg FRAME1024TUP;
+ dv_reg NETOCTETS;
+ dv_reg RXSOFOVERRUNS;
+ dv_reg RXMOFOVERRUNS;
+ dv_reg RXDMAOVERRUNS;
+ u_int8_t RSVD7[624];
+ dv_reg MACADDRLO;
+ dv_reg MACADDRHI;
+ dv_reg MACINDEX;
+ u_int8_t RSVD8[244];
+ dv_reg TX0HDP;
+ dv_reg TX1HDP;
+ dv_reg TX2HDP;
+ dv_reg TX3HDP;
+ dv_reg TX4HDP;
+ dv_reg TX5HDP;
+ dv_reg TX6HDP;
+ dv_reg TX7HDP;
+ dv_reg RX0HDP;
+ dv_reg RX1HDP;
+ dv_reg RX2HDP;
+ dv_reg RX3HDP;
+ dv_reg RX4HDP;
+ dv_reg RX5HDP;
+ dv_reg RX6HDP;
+ dv_reg RX7HDP;
+ dv_reg TX0CP;
+ dv_reg TX1CP;
+ dv_reg TX2CP;
+ dv_reg TX3CP;
+ dv_reg TX4CP;
+ dv_reg TX5CP;
+ dv_reg TX6CP;
+ dv_reg TX7CP;
+ dv_reg RX0CP;
+ dv_reg RX1CP;
+ dv_reg RX2CP;
+ dv_reg RX3CP;
+ dv_reg RX4CP;
+ dv_reg RX5CP;
+ dv_reg RX6CP;
+ dv_reg RX7CP;
+} emac_regs;
+
+/* EMAC Wrapper Registers Structure */
+typedef struct {
+#ifdef DAVINCI_EMAC_VERSION2
+ dv_reg idver;
+ dv_reg softrst;
+ dv_reg emctrl;
+ dv_reg c0rxthreshen;
+ dv_reg c0rxen;
+ dv_reg c0txen;
+ dv_reg c0miscen;
+ dv_reg c1rxthreshen;
+ dv_reg c1rxen;
+ dv_reg c1txen;
+ dv_reg c1miscen;
+ dv_reg c2rxthreshen;
+ dv_reg c2rxen;
+ dv_reg c2txen;
+ dv_reg c2miscen;
+ dv_reg c0rxthreshstat;
+ dv_reg c0rxstat;
+ dv_reg c0txstat;
+ dv_reg c0miscstat;
+ dv_reg c1rxthreshstat;
+ dv_reg c1rxstat;
+ dv_reg c1txstat;
+ dv_reg c1miscstat;
+ dv_reg c2rxthreshstat;
+ dv_reg c2rxstat;
+ dv_reg c2txstat;
+ dv_reg c2miscstat;
+ dv_reg c0rximax;
+ dv_reg c0tximax;
+ dv_reg c1rximax;
+ dv_reg c1tximax;
+ dv_reg c2rximax;
+ dv_reg c2tximax;
+#else
+ u_int8_t RSVD0[4100];
+ dv_reg EWCTL;
+ dv_reg EWINTTCNT;
+#endif
+} ewrap_regs;
+
+/* EMAC MDIO Registers Structure */
+typedef struct {
+ dv_reg VERSION;
+ dv_reg CONTROL;
+ dv_reg ALIVE;
+ dv_reg LINK;
+ dv_reg LINKINTRAW;
+ dv_reg LINKINTMASKED;
+ u_int8_t RSVD0[8];
+ dv_reg USERINTRAW;
+ dv_reg USERINTMASKED;
+ dv_reg USERINTMASKSET;
+ dv_reg USERINTMASKCLEAR;
+ u_int8_t RSVD1[80];
+ dv_reg USERACCESS0;
+ dv_reg USERPHYSEL0;
+ dv_reg USERACCESS1;
+ dv_reg USERPHYSEL1;
+} mdio_regs;
+
+typedef struct
+{
+ char name[64];
+ int (*init)(int phy_addr);
+ int (*is_phy_connected)(int phy_addr);
+ int (*get_link_speed)(int phy_addr);
+ int (*auto_negotiate)(int phy_addr);
+} phy_t;
+
+#endif /* _DAVINCI_EMAC_H_ */
--
1.7.10.4
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^ permalink raw reply [flat|nested] 24+ messages in thread* Re: [PATCH 08/10] drivers/net: add driver for the EMAC device found in some TI SoCs
2012-09-03 11:46 ` [PATCH 08/10] drivers/net: add driver for the EMAC device found in some TI SoCs Jan Luebbe
@ 2012-09-03 16:27 ` Jean-Christophe PLAGNIOL-VILLARD
2012-09-04 8:42 ` Sascha Hauer
1 sibling, 0 replies; 24+ messages in thread
From: Jean-Christophe PLAGNIOL-VILLARD @ 2012-09-03 16:27 UTC (permalink / raw)
To: Jan Luebbe; +Cc: barebox
On 13:46 Mon 03 Sep , Jan Luebbe wrote:
> Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
> ---
> arch/arm/mach-omap/include/mach/emac_defs.h | 53 +++
> drivers/net/Kconfig | 5 +
> drivers/net/Makefile | 1 +
> drivers/net/davinci_emac.c | 619 +++++++++++++++++++++++++++
> drivers/net/davinci_emac.h | 331 ++++++++++++++
> 5 files changed, 1009 insertions(+)
> create mode 100644 arch/arm/mach-omap/include/mach/emac_defs.h
> create mode 100644 drivers/net/davinci_emac.c
> create mode 100644 drivers/net/davinci_emac.h
>
> diff --git a/arch/arm/mach-omap/include/mach/emac_defs.h b/arch/arm/mach-omap/include/mach/emac_defs.h
> new file mode 100644
> index 0000000..ef930fc
> --- /dev/null
> +++ b/arch/arm/mach-omap/include/mach/emac_defs.h
> @@ -0,0 +1,53 @@
> +/*
> + * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
> + *
> + * Based on:
this drivers is really not clean ad very difficult to read
no please re-write it clean
no UPERCASE and no struct for the regs it's horrible
Best Regards,
J.
> + *
> + * ----------------------------------------------------------------------------
> + *
> + * dm644x_emac.h
> + *
> + * TI DaVinci (DM644X) EMAC peripheral driver header for DV-EVM
> + *
> + * Copyright (C) 2005 Texas Instruments.
> + *
> + * ----------------------------------------------------------------------------
> + *
> + * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
> + * ----------------------------------------------------------------------------
> +
> + * Modifications:
> + * ver. 1.0: Sep 2005, TI PSP Team - Created EMAC version for uBoot.
> + *
> + */
> +
> +#ifndef _AM3517_EMAC_H_
> +#define _AM3517_EMAC_H_
> +
> +#define EMAC_BASE_ADDR 0x5C010000
> +#define EMAC_WRAPPER_BASE_ADDR 0x5C000000
> +#define EMAC_WRAPPER_RAM_ADDR 0x5C020000
> +#define EMAC_MDIO_BASE_ADDR 0x5C030000
> +#define EMAC_HW_RAM_ADDR 0x01E20000
> +
> +#define EMAC_MDIO_BUS_FREQ 166000000 /* 166 MHZ check */
> +#define EMAC_MDIO_CLOCK_FREQ 1000000 /* 2.0 MHz */
> +
> +/* SOFTRESET macro definition interferes with emac_regs structure definition */
> +#undef SOFTRESET
> +
> +#define DAVINCI_EMAC_VERSION2
> +
> +#endif /* _AM3517_EMAC_H_ */
> diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
> index 0fa4f14..68c11eb 100644
> --- a/drivers/net/Kconfig
> +++ b/drivers/net/Kconfig
> @@ -49,6 +49,11 @@ config DRIVER_NET_SMC91111
> This option enables support for the SMSC LAN91C111
> ethernet chip.
>
> +config DRIVER_NET_DAVINCI_EMAC
> + bool "TI Davinci/OMAP EMAC ethernet driver"
> + depends on ARCH_DAVINCI || ARCH_OMAP3
> + select MIIDEV
> +
> config DRIVER_NET_DM9K
> bool "Davicom dm9k[E|A|B] ethernet driver"
> depends on HAS_DM9000
> diff --git a/drivers/net/Makefile b/drivers/net/Makefile
> index b589240..0f1363f 100644
> --- a/drivers/net/Makefile
> +++ b/drivers/net/Makefile
> @@ -1,6 +1,7 @@
> obj-$(CONFIG_DRIVER_NET_CS8900) += cs8900.o
> obj-$(CONFIG_DRIVER_NET_SMC911X) += smc911x.o
> obj-$(CONFIG_DRIVER_NET_SMC91111) += smc91111.o
> +obj-$(CONFIG_DRIVER_NET_DAVINCI_EMAC) += davinci_emac.o
> obj-$(CONFIG_DRIVER_NET_DM9K) += dm9k.o
> obj-$(CONFIG_DRIVER_NET_NETX) += netx_eth.o
> obj-$(CONFIG_DRIVER_NET_AT91_ETHER) += at91_ether.o
> diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
> new file mode 100644
> index 0000000..b9670ca
> --- /dev/null
> +++ b/drivers/net/davinci_emac.c
> @@ -0,0 +1,619 @@
> +/*
> + * Copyright (C) 2012 Jan Luebbe <j.luebbe@pengutronix.de>
> + *
> + * Ethernet driver for TI TMS320DM644x (DaVinci) chips.
> + *
> + * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
> + *
> + * Parts shamelessly stolen from TI's dm644x_emac.c. Original copyright
> + * follows:
> + *
> + * ----------------------------------------------------------------------------
> + *
> + * dm644x_emac.c
> + *
> + * TI DaVinci (DM644X) EMAC peripheral driver source for DV-EVM
> + *
> + * Copyright (C) 2005 Texas Instruments.
> + *
> + * ----------------------------------------------------------------------------
> + *
> + * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
> + * ----------------------------------------------------------------------------
> +
> + * Modifications:
> + * ver. 1.0: Sep 2005, Anant Gole - Created EMAC version for uBoot.
> + * ver 1.1: Nov 2005, Anant Gole - Extended the RX logic for multiple descriptors
> + *
> + */
> +
> +#include <common.h>
> +#include <io.h>
> +#include <clock.h>
> +#include <net.h>
> +#include <miidev.h>
> +#include <malloc.h>
> +#include <init.h>
> +#include <asm/mmu.h>
> +#include <asm/system.h>
> +#include <mach/emac_defs.h>
> +#include "davinci_emac.h"
> +
> +struct davinci_emac_priv {
> + struct device_d *dev;
> + struct eth_device edev;
> + struct mii_device miidev;
> + void __iomem *regs;
> +
> + /* EMAC Addresses */
> + emac_regs *adap_emac; /* = (emac_regs *)EMAC_BASE_ADDR; */
> + ewrap_regs *adap_ewrap; /* = (ewrap_regs *)EMAC_WRAPPER_BASE_ADDR; */
> + mdio_regs *adap_mdio; /* = (mdio_regs *)EMAC_MDIO_BASE_ADDR; */
> +
> + /* EMAC descriptors */
> + emac_desc *emac_rx_desc; /* = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_RX_DESC_BASE); */
> + emac_desc *emac_tx_desc; /* = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_TX_DESC_BASE); */
> + emac_desc *emac_rx_active_head; /* = 0; */
> + emac_desc *emac_rx_active_tail; /* = 0; */
> + int emac_rx_queue_active; /* = 0; */
> +
> + /* Receive packet buffers */
> + unsigned char *emac_rx_buffers; /* [EMAC_MAX_RX_BUFFERS * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN)]; */
> +
> + /* PHY address for a discovered PHY (0xff - not found) */
> + u_int8_t active_phy_addr; /* = 0xff; */
> +};
> +
> +/* davinci_eth_mac_addr[0] goes out on the wire first */
> +
> +static u_int8_t davinci_eth_mac_addr[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0x00 };
> +
> +/*
> + * This function must be called before emac_open() if you want to override
> + * the default mac address.
> + */
> +void davinci_eth_set_mac_addr(const u_int8_t *addr)
> +{
> + int i;
> +
> + for (i = 0; i < sizeof(davinci_eth_mac_addr); i++)
> + davinci_eth_mac_addr[i] = addr[i];
> +}
> +
> +#ifdef EMAC_HW_RAM_ADDR
> +static inline dv_reg BD_TO_HW(emac_desc *x)
> +{
> + if (x == 0)
> + return 0;
> +
> + return (dv_reg)(x) - EMAC_WRAPPER_RAM_ADDR + EMAC_HW_RAM_ADDR;
> +}
> +
> +static inline emac_desc* HW_TO_BD(dv_reg x)
> +{
> + if (x == 0)
> + return 0;
> +
> + return (emac_desc*)(x - EMAC_HW_RAM_ADDR + EMAC_WRAPPER_RAM_ADDR);
> +}
> +#else
> +#define BD_TO_HW(x) (x)
> +#define HW_TO_BD(x) (x)
> +#endif
> +
> +static void davinci_eth_mdio_enable(struct davinci_emac_priv *priv)
> +{
> + u_int32_t clkdiv;
> +
> + clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
> +
> + dev_dbg(priv->dev, "mdio_enable + 0x%08x\n", priv->adap_mdio->CONTROL);
> + writel((clkdiv & 0xff) |
> + MDIO_CONTROL_ENABLE |
> + MDIO_CONTROL_FAULT |
> + MDIO_CONTROL_FAULT_ENABLE,
> + &priv->adap_mdio->CONTROL);
> + dev_dbg(priv->dev, "mdio_enable - 0x%08x\n", priv->adap_mdio->CONTROL);
> +
> + while (readl(&priv->adap_mdio->CONTROL) & MDIO_CONTROL_IDLE);
> +}
> +
> +/* Read a PHY register via MDIO inteface. Returns 1 on success, 0 otherwise */
> +int davinci_eth_phy_read(struct davinci_emac_priv *priv, u_int8_t phy_addr, u_int8_t reg_num, u_int16_t *data)
> +{
> + int tmp;
> +
> + while (readl(&priv->adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO);
> +
> + writel(MDIO_USERACCESS0_GO |
> + MDIO_USERACCESS0_WRITE_READ |
> + ((reg_num & 0x1f) << 21) |
> + ((phy_addr & 0x1f) << 16),
> + &priv->adap_mdio->USERACCESS0);
> +
> + /* Wait for command to complete */
> + while ((tmp = readl(&priv->adap_mdio->USERACCESS0)) & MDIO_USERACCESS0_GO);
> +
> + if (tmp & MDIO_USERACCESS0_ACK) {
> + *data = tmp & 0xffff;
> + dev_dbg(priv->dev, "emac_phy_read: addr=0x%02x reg=0x%02x data=0x%04x\n",
> + phy_addr, reg_num, *data);
> + return 1;
> + }
> +
> + *data = -1;
> + return 0;
> +}
> +
> +/* Write to a PHY register via MDIO inteface. Blocks until operation is complete. */
> +int davinci_eth_phy_write(struct davinci_emac_priv *priv, u_int8_t phy_addr, u_int8_t reg_num, u_int16_t data)
> +{
> +
> + while (readl(&priv->adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO);
> +
> + dev_dbg(priv->dev, "emac_phy_write: addr=0x%02x reg=0x%02x data=0x%04x\n",
> + phy_addr, reg_num, data);
> + writel(MDIO_USERACCESS0_GO |
> + MDIO_USERACCESS0_WRITE_WRITE |
> + ((reg_num & 0x1f) << 21) |
> + ((phy_addr & 0x1f) << 16) |
> + (data & 0xffff),
> + &priv->adap_mdio->USERACCESS0);
> +
> + /* Wait for command to complete */
> + while (readl(&priv->adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO);
> +
> + return 1;
> +}
> +
> +static int davinci_miidev_read(struct mii_device *dev, int addr, int reg)
> +{
> + struct davinci_emac_priv *priv = (struct davinci_emac_priv *)dev->edev->priv;
> + uint16_t value = 0;
> + return davinci_eth_phy_read(priv, addr, reg, &value) ? value : -1;
> +}
> +
> +static int davinci_miidev_write(struct mii_device *dev, int addr, int reg, int value)
> +{
> + struct davinci_emac_priv *priv = (struct davinci_emac_priv *)dev->edev->priv;
> + return davinci_eth_phy_write(priv, addr, reg, value) ? 0 : -1;
> +}
> +
> +static int davinci_emac_get_ethaddr(struct eth_device *edev, unsigned char *adr)
> +{
> + return -1;
> +}
> +
> +static int davinci_emac_set_ethaddr(struct eth_device *edev, unsigned char *adr)
> +{
> + davinci_eth_set_mac_addr(adr);
> + return 0;
> +}
> +
> +static int davinci_emac_init(struct eth_device *edev)
> +{
> + dev_dbg(&edev->dev, "* emac_init\n");
> + return 0;
> +}
> +
> +static int davinci_emac_open(struct eth_device *edev)
> +{
> + struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
> +
> + dv_reg_p addr;
> + u_int32_t clkdiv, cnt;
> + emac_desc *rx_desc;
> + unsigned long mac_hi, mac_lo;
> + int ret;
> +
> + dev_dbg(priv->dev, "+ emac_open\n");
> +
> + dev_dbg(priv->dev, "emac->TXIDVER: 0x%08x\n", priv->adap_emac->TXIDVER);
> + dev_dbg(priv->dev, "emac->RXIDVER: 0x%08x\n", priv->adap_emac->RXIDVER);
> +
> + /* Reset EMAC module and disable interrupts in wrapper */
> + writel(1, &priv->adap_emac->SOFTRESET);
> + while (readl(&priv->adap_emac->SOFTRESET) != 0);
> + writel(1, &priv->adap_ewrap->softrst);
> + while (readl(&priv->adap_ewrap->softrst) != 0);
> +
> + writel(0, &priv->adap_ewrap->c0rxen);
> + writel(0, &priv->adap_ewrap->c1rxen);
> + writel(0, &priv->adap_ewrap->c2rxen);
> + writel(0, &priv->adap_ewrap->c0txen);
> + writel(0, &priv->adap_ewrap->c1txen);
> + writel(0, &priv->adap_ewrap->c2txen);
> + writel(0, &priv->adap_ewrap->c0miscen);
> + writel(0, &priv->adap_ewrap->c1miscen);
> + writel(0, &priv->adap_ewrap->c2miscen);
> +
> + rx_desc = priv->emac_rx_desc;
> +
> + /*
> + * Set MAC Addresses & Init multicast Hash to 0 (disable any multicast
> + * receive)
> + * Use channel 0 only - other channels are disabled
> + */
> + writel(0, &priv->adap_emac->MACINDEX);
> + mac_hi = (davinci_eth_mac_addr[3] << 24) |
> + (davinci_eth_mac_addr[2] << 16) |
> + (davinci_eth_mac_addr[1] << 8) |
> + (davinci_eth_mac_addr[0]);
> + mac_lo = (davinci_eth_mac_addr[5] << 8) |
> + (davinci_eth_mac_addr[4]);
> +
> + writel(mac_hi, &priv->adap_emac->MACADDRHI);
> + writel(mac_lo | EMAC_MAC_ADDR_IS_VALID | EMAC_MAC_ADDR_MATCH,
> + &priv->adap_emac->MACADDRLO);
> +
> + /* Set source MAC address - REQUIRED */
> + writel(mac_hi, &priv->adap_emac->MACSRCADDRHI);
> + writel(mac_lo, &priv->adap_emac->MACSRCADDRLO);
> +
> + /* Set DMA 8 TX / 8 RX Head pointers to 0 */
> + addr = &priv->adap_emac->TX0HDP;
> + for(cnt = 0; cnt < 16; cnt++)
> + *addr++ = 0;
> +
> + addr = &priv->adap_emac->RX0HDP;
> + for(cnt = 0; cnt < 16; cnt++)
> + *addr++ = 0;
> +
> + /* Clear Statistics (do this before setting MacControl register) */
> + addr = &priv->adap_emac->RXGOODFRAMES;
> + for(cnt = 0; cnt < EMAC_NUM_STATS; cnt++)
> + *addr++ = 0;
> +
> + /* No multicast addressing */
> + writel(0, &priv->adap_emac->MACHASH1);
> + writel(0, &priv->adap_emac->MACHASH2);
> +
> + writel(0x01, &priv->adap_emac->TXCONTROL);
> + writel(0x01, &priv->adap_emac->RXCONTROL);
> +
> + /* Create RX queue and set receive process in place */
> + priv->emac_rx_active_head = priv->emac_rx_desc;
> + for (cnt = 0; cnt < EMAC_MAX_RX_BUFFERS; cnt++) {
> + rx_desc->next = BD_TO_HW(rx_desc + 1);
> + rx_desc->buffer = &priv->emac_rx_buffers[cnt * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN)];
> + rx_desc->buff_off_len = EMAC_MAX_ETHERNET_PKT_SIZE;
> + rx_desc->pkt_flag_len = EMAC_CPPI_OWNERSHIP_BIT;
> + rx_desc++;
> + }
> +
> + /* Set the last descriptor's "next" parameter to 0 to end the RX desc list */
> + rx_desc--;
> + rx_desc->next = 0;
> + priv->emac_rx_active_tail = rx_desc;
> + priv->emac_rx_queue_active = 1;
> +
> + /* Enable TX/RX */
> + writel(EMAC_MAX_ETHERNET_PKT_SIZE, &priv->adap_emac->RXMAXLEN);
> + writel(0, &priv->adap_emac->RXBUFFEROFFSET);
> +
> + /* No fancy configs - Use this for promiscous for debug - EMAC_RXMBPENABLE_RXCAFEN_ENABLE */
> + writel(EMAC_RXMBPENABLE_RXBROADEN, &priv->adap_emac->RXMBPENABLE);
> +
> + /* Enable ch 0 only */
> + writel(0x01, &priv->adap_emac->RXUNICASTSET);
> +
> + /* Enable MII interface and full duplex mode (using RMMI) */
> + writel((EMAC_MACCONTROL_MIIEN_ENABLE |
> + EMAC_MACCONTROL_FULLDUPLEX_ENABLE |
> + EMAC_MACCONTROL_RMIISPEED_100),
> + &priv->adap_emac->MACCONTROL);
> +
> + /* Init MDIO & get link state */
> + clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
> + writel((clkdiv & 0xff) | MDIO_CONTROL_ENABLE | MDIO_CONTROL_FAULT,
> + &priv->adap_mdio->CONTROL);
> +
> + /* Start receive process */
> + writel(BD_TO_HW(priv->emac_rx_desc), &priv->adap_emac->RX0HDP);
> +
> + ret = miidev_wait_aneg(&priv->miidev);
> + if (ret)
> + return ret;
> +
> + ret = miidev_get_status(&priv->miidev);
> + if (ret < 0)
> + return ret;
> +
> + miidev_print_status(&priv->miidev);
> +
> + dev_dbg(priv->dev, "- emac_open\n");
> +
> + return 0;
> +}
> +
> +/* EMAC Channel Teardown */
> +static void davinci_eth_ch_teardown(struct davinci_emac_priv *priv, int ch)
> +{
> + dv_reg dly = 0xff;
> + dv_reg cnt;
> +
> + dev_dbg(priv->dev, "+ emac_ch_teardown\n");
> +
> + if (ch == EMAC_CH_TX) {
> + /* Init TX channel teardown */
> + writel(0, &priv->adap_emac->TXTEARDOWN);
> + for(cnt = 0; cnt != 0xfffffffc; cnt = readl(&priv->adap_emac->TX0CP)) {
> + /* Wait here for Tx teardown completion interrupt to occur
> + * Note: A task delay can be called here to pend rather than
> + * occupying CPU cycles - anyway it has been found that teardown
> + * takes very few cpu cycles and does not affect functionality */
> + dly--;
> + udelay(1);
> + if (dly == 0)
> + break;
> + }
> + writel(cnt, &priv->adap_emac->TX0CP);
> + writel(0, &priv->adap_emac->TX0HDP);
> + } else {
> + /* Init RX channel teardown */
> + writel(0, &priv->adap_emac->RXTEARDOWN);
> + for(cnt = 0; cnt != 0xfffffffc; cnt = readl(&priv->adap_emac->RX0CP)) {
> + /* Wait here for Rx teardown completion interrupt to occur
> + * Note: A task delay can be called here to pend rather than
> + * occupying CPU cycles - anyway it has been found that teardown
> + * takes very few cpu cycles and does not affect functionality */
> + dly--;
> + udelay(1);
> + if (dly == 0)
> + break;
> + }
> + writel(cnt, &priv->adap_emac->RX0CP);
> + writel(0, &priv->adap_emac->RX0HDP);
> + }
> +
> + dev_dbg(priv->dev, "- emac_ch_teardown\n");
> +}
> +
> +static void davinci_emac_halt(struct eth_device *edev)
> +{
> + struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
> +
> + dev_dbg(priv->dev, "+ emac_halt\n");
> +
> + davinci_eth_ch_teardown(priv, EMAC_CH_TX); /* TX Channel teardown */
> + davinci_eth_ch_teardown(priv, EMAC_CH_RX); /* RX Channel teardown */
> +
> + /* Reset EMAC module and disable interrupts in wrapper */
> + writel(1, &priv->adap_emac->SOFTRESET);
> + writel(1, &priv->adap_ewrap->softrst);
> +
> + writel(0, &priv->adap_ewrap->c0rxen);
> + writel(0, &priv->adap_ewrap->c1rxen);
> + writel(0, &priv->adap_ewrap->c2rxen);
> + writel(0, &priv->adap_ewrap->c0txen);
> + writel(0, &priv->adap_ewrap->c1txen);
> + writel(0, &priv->adap_ewrap->c2txen);
> + writel(0, &priv->adap_ewrap->c0miscen);
> + writel(0, &priv->adap_ewrap->c1miscen);
> + writel(0, &priv->adap_ewrap->c2miscen);
> +
> + dev_dbg(priv->dev, "- emac_halt\n");
> +}
> +
> +/*
> + * This function sends a single packet on the network and returns
> + * positive number (number of bytes transmitted) or negative for error
> + */
> +static int davinci_emac_send(struct eth_device *edev, void *packet, int length)
> +{
> + struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
> + uint64_t start = 0;
> + int ret_status = -1;
> +
> + dev_dbg(priv->dev, "+ emac_send (length %d)\n", length);
> +
> + /* Check packet size and if < EMAC_MIN_ETHERNET_PKT_SIZE, pad it up */
> + if (length < EMAC_MIN_ETHERNET_PKT_SIZE) {
> + length = EMAC_MIN_ETHERNET_PKT_SIZE;
> + }
> +
> + /* Populate the TX descriptor */
> + writel(0, &priv->emac_tx_desc->next);
> + writel((u_int8_t *) packet, &priv->emac_tx_desc->buffer);
> + writel((length & 0xffff), &priv->emac_tx_desc->buff_off_len);
> + writel(((length & 0xffff) | EMAC_CPPI_SOP_BIT |
> + EMAC_CPPI_OWNERSHIP_BIT |
> + EMAC_CPPI_EOP_BIT),
> + &priv->emac_tx_desc->pkt_flag_len);
> + dma_flush_range((ulong) packet, (ulong)packet + length);
> + /* Send the packet */
> + writel(BD_TO_HW(priv->emac_tx_desc), &priv->adap_emac->TX0HDP);
> +
> + /* Wait for packet to complete or link down */
> + start = get_time_ns();
> + while (1) {
> + if (readl(&priv->adap_emac->TXINTSTATRAW) & 0x01) {
> + /* Acknowledge the TX descriptor */
> + writel(BD_TO_HW(priv->emac_tx_desc), &priv->adap_emac->TX0CP);
> + ret_status = length;
> + break;
> + }
> + }
> +
> + dev_dbg(priv->dev, "- emac_send (ret_status %i)\n", ret_status);
> + return ret_status;
> +}
> +
> +/*
> + * This function handles receipt of a packet from the network
> + */
> +static int davinci_emac_recv(struct eth_device *edev)
> +{
> + struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
> + emac_desc *rx_curr_desc;
> + emac_desc *curr_desc;
> + emac_desc *tail_desc;
> + unsigned char *pkt;
> + int status, len, ret = -1;
> +
> + dev_dbg(priv->dev, "+ emac_recv\n");
> +
> + rx_curr_desc = priv->emac_rx_active_head;
> + status = readl(&rx_curr_desc->pkt_flag_len);
> + if ((rx_curr_desc) && ((status & EMAC_CPPI_OWNERSHIP_BIT) == 0)) {
> + if (status & EMAC_CPPI_RX_ERROR_FRAME) {
> + /* Error in packet - discard it and requeue desc */
> + dev_warn(priv->dev, "WARN: emac_rcv_pkt: Error in packet\n");
> + } else {
> + pkt = (unsigned char *)readl(&rx_curr_desc->buffer);
> + len = readl(&rx_curr_desc->buff_off_len) & 0xffff;
> + dev_dbg(priv->dev, "| emac_recv got packet (length %i)\n", len);
> + dma_inv_range((ulong)pkt,
> + (ulong)rx_curr_desc->buffer + len);
> + net_receive(pkt, len);
> + ret = len;
> + }
> +
> + /* Ack received packet descriptor */
> + writel(BD_TO_HW(rx_curr_desc), &priv->adap_emac->RX0CP);
> + curr_desc = rx_curr_desc;
> + priv->emac_rx_active_head = HW_TO_BD(readl(&rx_curr_desc->next));
> +
> + if (status & EMAC_CPPI_EOQ_BIT) {
> + if (priv->emac_rx_active_head) {
> + writel(BD_TO_HW(priv->emac_rx_active_head),
> + &priv->adap_emac->RX0HDP);
> + } else {
> + priv->emac_rx_queue_active = 0;
> + dev_info(priv->dev, "INFO:emac_rcv_packet: RX Queue not active\n");
> + }
> + }
> +
> + /* Recycle RX descriptor */
> + writel(EMAC_MAX_ETHERNET_PKT_SIZE, &rx_curr_desc->buff_off_len);
> + writel(EMAC_CPPI_OWNERSHIP_BIT, &rx_curr_desc->pkt_flag_len);
> + writel(0, &rx_curr_desc->next);
> +
> + if (priv->emac_rx_active_head == 0) {
> + dev_info(priv->dev, "INFO: emac_rcv_pkt: active queue head = 0\n");
> + priv->emac_rx_active_head = curr_desc;
> + priv->emac_rx_active_tail = curr_desc;
> + if (priv->emac_rx_queue_active != 0) {
> + writel(BD_TO_HW(priv->emac_rx_active_head), &priv->adap_emac->RX0HDP);
> + dev_info(priv->dev, "INFO: emac_rcv_pkt: active queue head = 0, HDP fired\n");
> + priv->emac_rx_queue_active = 1;
> + }
> + } else {
> + tail_desc = priv->emac_rx_active_tail;
> + priv->emac_rx_active_tail = curr_desc;
> + writel(BD_TO_HW(curr_desc), &tail_desc->next);
> + status = readl(&tail_desc->pkt_flag_len);
> + if (status & EMAC_CPPI_EOQ_BIT) {
> + writel(BD_TO_HW(curr_desc), &priv->adap_emac->RX0HDP);
> + status &= ~EMAC_CPPI_EOQ_BIT;
> + writel(status, &tail_desc->pkt_flag_len);
> + }
> + }
> + return ret;
> + }
> +
> + dev_dbg(priv->dev, "- emac_recv\n");
> +
> + return 0;
> +}
> +
> +static int davinci_emac_probe(struct device_d *dev)
> +{
> + struct davinci_emac_priv *priv;
> + int i;
> +
> + dev_dbg(dev, "+ emac_probe\n");
> +
> + priv = xzalloc(sizeof(*priv));
> + dev->priv = priv;
> +
> + priv->dev = dev;
> +
> + priv->adap_emac = (emac_regs *)EMAC_BASE_ADDR;
> + priv->adap_ewrap = (ewrap_regs *)EMAC_WRAPPER_BASE_ADDR;
> + priv->adap_mdio = (mdio_regs *)EMAC_MDIO_BASE_ADDR;
> +
> + /* EMAC descriptors */
> + priv->emac_rx_desc = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_RX_DESC_BASE);
> + priv->emac_tx_desc = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_TX_DESC_BASE);
> + priv->emac_rx_active_head = 0;
> + priv->emac_rx_active_tail = 0;
> + priv->emac_rx_queue_active = 0;
> +
> + /* Receive packet buffers */
> + priv->emac_rx_buffers = xmemalign(4096, EMAC_MAX_RX_BUFFERS * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN));
> +
> + /* PHY address for a discovered PHY (0xff - not found) */
> + priv->active_phy_addr = 0xff;
> +
> + priv->edev.priv = priv;
> + priv->edev.init = davinci_emac_init;
> + priv->edev.open = davinci_emac_open;
> + priv->edev.halt = davinci_emac_halt;
> + priv->edev.send = davinci_emac_send;
> + priv->edev.recv = davinci_emac_recv;
> + priv->edev.get_ethaddr = davinci_emac_get_ethaddr;
> + priv->edev.set_ethaddr = davinci_emac_set_ethaddr;
> + priv->edev.parent = dev;
> +
> + priv->regs = dev_request_mem_region(dev, 0);
> +
> + davinci_eth_mdio_enable(priv);
> +
> + for (i = 0; i < 256; i++) {
> + if (priv->adap_mdio->ALIVE)
> + break;
> + udelay(1000);
> + }
> +
> + if (i >= 256) {
> + dev_err(dev, "No ETH PHY detected!\n");
> + }
> +
> + priv->miidev.read = davinci_miidev_read;
> + priv->miidev.write = davinci_miidev_write;
> + priv->miidev.address = 0x01;
> + priv->miidev.flags = MIIDEV_FORCE_LINK;
> + priv->miidev.edev = &priv->edev;
> + priv->miidev.parent = dev;
> +
> + mii_register(&priv->miidev);
> +
> + eth_register(&priv->edev);
> +
> + dev_dbg(dev, "- emac_probe\n");
> + return 0;
> +}
> +
> +static void davinci_emac_remove(struct device_d *dev)
> +{
> + struct davinci_emac_priv *priv = dev->priv;
> +
> + davinci_emac_halt(&priv->edev);
> +}
> +
> +static struct driver_d davinci_emac_driver = {
> + .name = "davinci_emac",
> + .probe = davinci_emac_probe,
> + .remove = davinci_emac_remove,
> +};
> +
> +static int davinci_emac_register(void)
> +{
> + register_driver(&davinci_emac_driver);
> + return 0;
> +}
> +
> +device_initcall(davinci_emac_register);
> diff --git a/drivers/net/davinci_emac.h b/drivers/net/davinci_emac.h
> new file mode 100644
> index 0000000..4e97ce5
> --- /dev/null
> +++ b/drivers/net/davinci_emac.h
> @@ -0,0 +1,331 @@
> +/*
> + * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
> + *
> + * Based on:
> + *
> + * ----------------------------------------------------------------------------
> + *
> + * dm644x_emac.h
> + *
> + * TI DaVinci (DM644X) EMAC peripheral driver header for DV-EVM
> + *
> + * Copyright (C) 2005 Texas Instruments.
> + *
> + * ----------------------------------------------------------------------------
> + *
> + * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
> + * ----------------------------------------------------------------------------
> +
> + * Modifications:
> + * ver. 1.0: Sep 2005, TI PSP Team - Created EMAC version for uBoot.
> + *
> + */
> +
> +#ifndef _DAVINCI_EMAC_H_
> +#define _DAVINCI_EMAC_H_
> +
> +/* PHY mask - set only those phy number bits where phy is/can be connected */
> +#define EMAC_MDIO_PHY_NUM 1
> +#define EMAC_MDIO_PHY_MASK (1 << EMAC_MDIO_PHY_NUM)
> +
> +/* Ethernet Min/Max packet size */
> +#define EMAC_MIN_ETHERNET_PKT_SIZE 60
> +#define EMAC_MAX_ETHERNET_PKT_SIZE 1518
> +#define EMAC_PKT_ALIGN 18 /* 1518 + 18 = 1536 (packet aligned on 32 byte boundry) */
> +
> +/* Number of RX packet buffers
> + * NOTE: Only 1 buffer supported as of now
> + */
> +#define EMAC_MAX_RX_BUFFERS 10
> +
> +typedef unsigned int dv_reg;
> +typedef unsigned int *dv_reg_p;
> +
> +/***********************************************
> + ******** Internally used macros ***************
> + ***********************************************/
> +
> +#define EMAC_CH_TX 1
> +#define EMAC_CH_RX 0
> +
> +/* Each descriptor occupies 4 words, lets start RX desc's at 0 and
> + * reserve space for 64 descriptors max
> + */
> +#define EMAC_RX_DESC_BASE 0x0
> +#define EMAC_TX_DESC_BASE 0x1000
> +
> +/* EMAC Teardown value */
> +#define EMAC_TEARDOWN_VALUE 0xfffffffc
> +
> +/* MII Status Register */
> +#define MII_STATUS_REG 1
> +
> +/* Number of statistics registers */
> +#define EMAC_NUM_STATS 36
> +
> +
> +/* EMAC Descriptor */
> +typedef struct
> +{
> + u_int32_t next; /* Pointer to next descriptor in chain */
> + u_int8_t *buffer; /* Pointer to data buffer */
> + u_int32_t buff_off_len; /* Buffer Offset(MSW) and Length(LSW) */
> + u_int32_t pkt_flag_len; /* Packet Flags(MSW) and Length(LSW) */
> +} emac_desc;
> +
> +/* CPPI bit positions */
> +#define EMAC_CPPI_SOP_BIT (0x80000000)
> +#define EMAC_CPPI_EOP_BIT (0x40000000)
> +#define EMAC_CPPI_OWNERSHIP_BIT (0x20000000)
> +#define EMAC_CPPI_EOQ_BIT (0x10000000)
> +#define EMAC_CPPI_TEARDOWN_COMPLETE_BIT (0x08000000)
> +#define EMAC_CPPI_PASS_CRC_BIT (0x04000000)
> +
> +#define EMAC_CPPI_RX_ERROR_FRAME (0x03fc0000)
> +
> +#define EMAC_MACCONTROL_MIIEN_ENABLE (0x20)
> +#define EMAC_MACCONTROL_FULLDUPLEX_ENABLE (0x1)
> +#define EMAC_MACCONTROL_GIGABIT_ENABLE (1 << 7)
> +#define EMAC_MACCONTROL_GIGFORCE (1 << 17)
> +#define EMAC_MACCONTROL_RMIISPEED_100 (1 << 15)
> +
> +#define EMAC_MAC_ADDR_MATCH (1 << 19)
> +#define EMAC_MAC_ADDR_IS_VALID (1 << 20)
> +
> +#define EMAC_RXMBPENABLE_RXCAFEN_ENABLE (0x200000)
> +#define EMAC_RXMBPENABLE_RXBROADEN (0x2000)
> +
> +
> +#define MDIO_CONTROL_IDLE (0x80000000)
> +#define MDIO_CONTROL_ENABLE (0x40000000)
> +#define MDIO_CONTROL_FAULT_ENABLE (0x40000)
> +#define MDIO_CONTROL_FAULT (0x80000)
> +#define MDIO_USERACCESS0_GO (0x80000000)
> +#define MDIO_USERACCESS0_WRITE_READ (0x0)
> +#define MDIO_USERACCESS0_WRITE_WRITE (0x40000000)
> +#define MDIO_USERACCESS0_ACK (0x20000000)
> +
> +/* Ethernet MAC Registers Structure */
> +typedef struct {
> + dv_reg TXIDVER;
> + dv_reg TXCONTROL;
> + dv_reg TXTEARDOWN;
> + u_int8_t RSVD0[4];
> + dv_reg RXIDVER;
> + dv_reg RXCONTROL;
> + dv_reg RXTEARDOWN;
> + u_int8_t RSVD1[100];
> + dv_reg TXINTSTATRAW;
> + dv_reg TXINTSTATMASKED;
> + dv_reg TXINTMASKSET;
> + dv_reg TXINTMASKCLEAR;
> + dv_reg MACINVECTOR;
> + u_int8_t RSVD2[12];
> + dv_reg RXINTSTATRAW;
> + dv_reg RXINTSTATMASKED;
> + dv_reg RXINTMASKSET;
> + dv_reg RXINTMASKCLEAR;
> + dv_reg MACINTSTATRAW;
> + dv_reg MACINTSTATMASKED;
> + dv_reg MACINTMASKSET;
> + dv_reg MACINTMASKCLEAR;
> + u_int8_t RSVD3[64];
> + dv_reg RXMBPENABLE;
> + dv_reg RXUNICASTSET;
> + dv_reg RXUNICASTCLEAR;
> + dv_reg RXMAXLEN;
> + dv_reg RXBUFFEROFFSET;
> + dv_reg RXFILTERLOWTHRESH;
> + u_int8_t RSVD4[8];
> + dv_reg RX0FLOWTHRESH;
> + dv_reg RX1FLOWTHRESH;
> + dv_reg RX2FLOWTHRESH;
> + dv_reg RX3FLOWTHRESH;
> + dv_reg RX4FLOWTHRESH;
> + dv_reg RX5FLOWTHRESH;
> + dv_reg RX6FLOWTHRESH;
> + dv_reg RX7FLOWTHRESH;
> + dv_reg RX0FREEBUFFER;
> + dv_reg RX1FREEBUFFER;
> + dv_reg RX2FREEBUFFER;
> + dv_reg RX3FREEBUFFER;
> + dv_reg RX4FREEBUFFER;
> + dv_reg RX5FREEBUFFER;
> + dv_reg RX6FREEBUFFER;
> + dv_reg RX7FREEBUFFER;
> + dv_reg MACCONTROL;
> + dv_reg MACSTATUS;
> + dv_reg EMCONTROL;
> + dv_reg FIFOCONTROL;
> + dv_reg MACCONFIG;
> + dv_reg SOFTRESET;
> + u_int8_t RSVD5[88];
> + dv_reg MACSRCADDRLO;
> + dv_reg MACSRCADDRHI;
> + dv_reg MACHASH1;
> + dv_reg MACHASH2;
> + dv_reg BOFFTEST;
> + dv_reg TPACETEST;
> + dv_reg RXPAUSE;
> + dv_reg TXPAUSE;
> + u_int8_t RSVD6[16];
> + dv_reg RXGOODFRAMES;
> + dv_reg RXBCASTFRAMES;
> + dv_reg RXMCASTFRAMES;
> + dv_reg RXPAUSEFRAMES;
> + dv_reg RXCRCERRORS;
> + dv_reg RXALIGNCODEERRORS;
> + dv_reg RXOVERSIZED;
> + dv_reg RXJABBER;
> + dv_reg RXUNDERSIZED;
> + dv_reg RXFRAGMENTS;
> + dv_reg RXFILTERED;
> + dv_reg RXQOSFILTERED;
> + dv_reg RXOCTETS;
> + dv_reg TXGOODFRAMES;
> + dv_reg TXBCASTFRAMES;
> + dv_reg TXMCASTFRAMES;
> + dv_reg TXPAUSEFRAMES;
> + dv_reg TXDEFERRED;
> + dv_reg TXCOLLISION;
> + dv_reg TXSINGLECOLL;
> + dv_reg TXMULTICOLL;
> + dv_reg TXEXCESSIVECOLL;
> + dv_reg TXLATECOLL;
> + dv_reg TXUNDERRUN;
> + dv_reg TXCARRIERSENSE;
> + dv_reg TXOCTETS;
> + dv_reg FRAME64;
> + dv_reg FRAME65T127;
> + dv_reg FRAME128T255;
> + dv_reg FRAME256T511;
> + dv_reg FRAME512T1023;
> + dv_reg FRAME1024TUP;
> + dv_reg NETOCTETS;
> + dv_reg RXSOFOVERRUNS;
> + dv_reg RXMOFOVERRUNS;
> + dv_reg RXDMAOVERRUNS;
> + u_int8_t RSVD7[624];
> + dv_reg MACADDRLO;
> + dv_reg MACADDRHI;
> + dv_reg MACINDEX;
> + u_int8_t RSVD8[244];
> + dv_reg TX0HDP;
> + dv_reg TX1HDP;
> + dv_reg TX2HDP;
> + dv_reg TX3HDP;
> + dv_reg TX4HDP;
> + dv_reg TX5HDP;
> + dv_reg TX6HDP;
> + dv_reg TX7HDP;
> + dv_reg RX0HDP;
> + dv_reg RX1HDP;
> + dv_reg RX2HDP;
> + dv_reg RX3HDP;
> + dv_reg RX4HDP;
> + dv_reg RX5HDP;
> + dv_reg RX6HDP;
> + dv_reg RX7HDP;
> + dv_reg TX0CP;
> + dv_reg TX1CP;
> + dv_reg TX2CP;
> + dv_reg TX3CP;
> + dv_reg TX4CP;
> + dv_reg TX5CP;
> + dv_reg TX6CP;
> + dv_reg TX7CP;
> + dv_reg RX0CP;
> + dv_reg RX1CP;
> + dv_reg RX2CP;
> + dv_reg RX3CP;
> + dv_reg RX4CP;
> + dv_reg RX5CP;
> + dv_reg RX6CP;
> + dv_reg RX7CP;
> +} emac_regs;
> +
> +/* EMAC Wrapper Registers Structure */
> +typedef struct {
> +#ifdef DAVINCI_EMAC_VERSION2
> + dv_reg idver;
> + dv_reg softrst;
> + dv_reg emctrl;
> + dv_reg c0rxthreshen;
> + dv_reg c0rxen;
> + dv_reg c0txen;
> + dv_reg c0miscen;
> + dv_reg c1rxthreshen;
> + dv_reg c1rxen;
> + dv_reg c1txen;
> + dv_reg c1miscen;
> + dv_reg c2rxthreshen;
> + dv_reg c2rxen;
> + dv_reg c2txen;
> + dv_reg c2miscen;
> + dv_reg c0rxthreshstat;
> + dv_reg c0rxstat;
> + dv_reg c0txstat;
> + dv_reg c0miscstat;
> + dv_reg c1rxthreshstat;
> + dv_reg c1rxstat;
> + dv_reg c1txstat;
> + dv_reg c1miscstat;
> + dv_reg c2rxthreshstat;
> + dv_reg c2rxstat;
> + dv_reg c2txstat;
> + dv_reg c2miscstat;
> + dv_reg c0rximax;
> + dv_reg c0tximax;
> + dv_reg c1rximax;
> + dv_reg c1tximax;
> + dv_reg c2rximax;
> + dv_reg c2tximax;
> +#else
> + u_int8_t RSVD0[4100];
> + dv_reg EWCTL;
> + dv_reg EWINTTCNT;
> +#endif
> +} ewrap_regs;
> +
> +/* EMAC MDIO Registers Structure */
> +typedef struct {
> + dv_reg VERSION;
> + dv_reg CONTROL;
> + dv_reg ALIVE;
> + dv_reg LINK;
> + dv_reg LINKINTRAW;
> + dv_reg LINKINTMASKED;
> + u_int8_t RSVD0[8];
> + dv_reg USERINTRAW;
> + dv_reg USERINTMASKED;
> + dv_reg USERINTMASKSET;
> + dv_reg USERINTMASKCLEAR;
> + u_int8_t RSVD1[80];
> + dv_reg USERACCESS0;
> + dv_reg USERPHYSEL0;
> + dv_reg USERACCESS1;
> + dv_reg USERPHYSEL1;
> +} mdio_regs;
> +
> +typedef struct
> +{
> + char name[64];
> + int (*init)(int phy_addr);
> + int (*is_phy_connected)(int phy_addr);
> + int (*get_link_speed)(int phy_addr);
> + int (*auto_negotiate)(int phy_addr);
> +} phy_t;
> +
> +#endif /* _DAVINCI_EMAC_H_ */
> --
> 1.7.10.4
>
>
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^ permalink raw reply [flat|nested] 24+ messages in thread* Re: [PATCH 08/10] drivers/net: add driver for the EMAC device found in some TI SoCs
2012-09-03 11:46 ` [PATCH 08/10] drivers/net: add driver for the EMAC device found in some TI SoCs Jan Luebbe
2012-09-03 16:27 ` Jean-Christophe PLAGNIOL-VILLARD
@ 2012-09-04 8:42 ` Sascha Hauer
1 sibling, 0 replies; 24+ messages in thread
From: Sascha Hauer @ 2012-09-04 8:42 UTC (permalink / raw)
To: Jan Luebbe; +Cc: barebox
On Mon, Sep 03, 2012 at 01:46:03PM +0200, Jan Luebbe wrote:
> Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
> ---
> arch/arm/mach-omap/include/mach/emac_defs.h | 53 +++
> drivers/net/Kconfig | 5 +
> drivers/net/Makefile | 1 +
> drivers/net/davinci_emac.c | 619 +++++++++++++++++++++++++++
> drivers/net/davinci_emac.h | 331 ++++++++++++++
> 5 files changed, 1009 insertions(+)
> create mode 100644 arch/arm/mach-omap/include/mach/emac_defs.h
> create mode 100644 drivers/net/davinci_emac.c
> create mode 100644 drivers/net/davinci_emac.h
>
> diff --git a/arch/arm/mach-omap/include/mach/emac_defs.h b/arch/arm/mach-omap/include/mach/emac_defs.h
> new file mode 100644
> index 0000000..ef930fc
> --- /dev/null
> +++ b/arch/arm/mach-omap/include/mach/emac_defs.h
> +struct davinci_emac_priv {
> + struct device_d *dev;
> + struct eth_device edev;
> + struct mii_device miidev;
> + void __iomem *regs;
This seems to be filled in in probe(), but otherwise unused.
> +
> + /* EMAC Addresses */
> + emac_regs *adap_emac; /* = (emac_regs *)EMAC_BASE_ADDR; */
> + ewrap_regs *adap_ewrap; /* = (ewrap_regs *)EMAC_WRAPPER_BASE_ADDR; */
> + mdio_regs *adap_mdio; /* = (mdio_regs *)EMAC_MDIO_BASE_ADDR; */
These should be filled in by resources, not hardcoded addresses.
> +};
> +
> +/* davinci_eth_mac_addr[0] goes out on the wire first */
> +
> +static u_int8_t davinci_eth_mac_addr[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0x00 };
Add this to struct davinci_emac_priv
> +
> +/*
> + * This function must be called before emac_open() if you want to override
> + * the default mac address.
> + */
> +void davinci_eth_set_mac_addr(const u_int8_t *addr)
static please. If you intend to call this from somewhere else than this
file there is something wrong.
> +}
> +
> +/* Read a PHY register via MDIO inteface. Returns 1 on success, 0 otherwise */
> +int davinci_eth_phy_read(struct davinci_emac_priv *priv, u_int8_t phy_addr, u_int8_t reg_num, u_int16_t *data)
static
> +{
> + int tmp;
> +
> + while (readl(&priv->adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO);
> +
> + writel(MDIO_USERACCESS0_GO |
> + MDIO_USERACCESS0_WRITE_READ |
> + ((reg_num & 0x1f) << 21) |
> + ((phy_addr & 0x1f) << 16),
> + &priv->adap_mdio->USERACCESS0);
> +
> + /* Wait for command to complete */
> + while ((tmp = readl(&priv->adap_mdio->USERACCESS0)) & MDIO_USERACCESS0_GO);
> +
> + if (tmp & MDIO_USERACCESS0_ACK) {
> + *data = tmp & 0xffff;
> + dev_dbg(priv->dev, "emac_phy_read: addr=0x%02x reg=0x%02x data=0x%04x\n",
> + phy_addr, reg_num, *data);
> + return 1;
> + }
> +
> + *data = -1;
> + return 0;
> +}
> +
> +/* Write to a PHY register via MDIO inteface. Blocks until operation is complete. */
> +int davinci_eth_phy_write(struct davinci_emac_priv *priv, u_int8_t phy_addr, u_int8_t reg_num, u_int16_t data)
static
> +{
> +
> + while (readl(&priv->adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO);
> +
> + dev_dbg(priv->dev, "emac_phy_write: addr=0x%02x reg=0x%02x data=0x%04x\n",
> + phy_addr, reg_num, data);
> + writel(MDIO_USERACCESS0_GO |
> + MDIO_USERACCESS0_WRITE_WRITE |
> + ((reg_num & 0x1f) << 21) |
> + ((phy_addr & 0x1f) << 16) |
> + (data & 0xffff),
> + &priv->adap_mdio->USERACCESS0);
> +
> + /* Wait for command to complete */
> + while (readl(&priv->adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO);
> +
> + return 1;
> +}
> +
> +static int davinci_miidev_read(struct mii_device *dev, int addr, int reg)
> +{
> + struct davinci_emac_priv *priv = (struct davinci_emac_priv *)dev->edev->priv;
> + uint16_t value = 0;
> + return davinci_eth_phy_read(priv, addr, reg, &value) ? value : -1;
> +}
> +
> +static int davinci_miidev_write(struct mii_device *dev, int addr, int reg, int value)
> +{
> + struct davinci_emac_priv *priv = (struct davinci_emac_priv *)dev->edev->priv;
> + return davinci_eth_phy_write(priv, addr, reg, value) ? 0 : -1;
> +}
> +
> +static int davinci_emac_get_ethaddr(struct eth_device *edev, unsigned char *adr)
> +{
> + return -1;
> +}
> +
> +static int davinci_emac_set_ethaddr(struct eth_device *edev, unsigned char *adr)
> +{
> + davinci_eth_set_mac_addr(adr);
> + return 0;
> +}
> +
> +static int davinci_emac_init(struct eth_device *edev)
> +{
> + dev_dbg(&edev->dev, "* emac_init\n");
> + return 0;
> +}
> +
> +static int davinci_emac_open(struct eth_device *edev)
> +{
> + struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
> +
> + dv_reg_p addr;
> + u_int32_t clkdiv, cnt;
> + emac_desc *rx_desc;
> + unsigned long mac_hi, mac_lo;
> + int ret;
> +
> + dev_dbg(priv->dev, "+ emac_open\n");
> +
> + dev_dbg(priv->dev, "emac->TXIDVER: 0x%08x\n", priv->adap_emac->TXIDVER);
> + dev_dbg(priv->dev, "emac->RXIDVER: 0x%08x\n", priv->adap_emac->RXIDVER);
> +
> + /* Reset EMAC module and disable interrupts in wrapper */
> + writel(1, &priv->adap_emac->SOFTRESET);
> + while (readl(&priv->adap_emac->SOFTRESET) != 0);
> + writel(1, &priv->adap_ewrap->softrst);
> + while (readl(&priv->adap_ewrap->softrst) != 0);
> +
> + writel(0, &priv->adap_ewrap->c0rxen);
> + writel(0, &priv->adap_ewrap->c1rxen);
> + writel(0, &priv->adap_ewrap->c2rxen);
> + writel(0, &priv->adap_ewrap->c0txen);
> + writel(0, &priv->adap_ewrap->c1txen);
> + writel(0, &priv->adap_ewrap->c2txen);
> + writel(0, &priv->adap_ewrap->c0miscen);
> + writel(0, &priv->adap_ewrap->c1miscen);
> + writel(0, &priv->adap_ewrap->c2miscen);
> +
> + rx_desc = priv->emac_rx_desc;
> +
> + /*
> + * Set MAC Addresses & Init multicast Hash to 0 (disable any multicast
> + * receive)
> + * Use channel 0 only - other channels are disabled
> + */
> + writel(0, &priv->adap_emac->MACINDEX);
> + mac_hi = (davinci_eth_mac_addr[3] << 24) |
> + (davinci_eth_mac_addr[2] << 16) |
> + (davinci_eth_mac_addr[1] << 8) |
> + (davinci_eth_mac_addr[0]);
> + mac_lo = (davinci_eth_mac_addr[5] << 8) |
> + (davinci_eth_mac_addr[4]);
> +
> + writel(mac_hi, &priv->adap_emac->MACADDRHI);
> + writel(mac_lo | EMAC_MAC_ADDR_IS_VALID | EMAC_MAC_ADDR_MATCH,
> + &priv->adap_emac->MACADDRLO);
> +
> + /* Set source MAC address - REQUIRED */
> + writel(mac_hi, &priv->adap_emac->MACSRCADDRHI);
> + writel(mac_lo, &priv->adap_emac->MACSRCADDRLO);
> +
> + /* Set DMA 8 TX / 8 RX Head pointers to 0 */
> + addr = &priv->adap_emac->TX0HDP;
> + for(cnt = 0; cnt < 16; cnt++)
> + *addr++ = 0;
> +
> + addr = &priv->adap_emac->RX0HDP;
> + for(cnt = 0; cnt < 16; cnt++)
> + *addr++ = 0;
> +
> + /* Clear Statistics (do this before setting MacControl register) */
> + addr = &priv->adap_emac->RXGOODFRAMES;
> + for(cnt = 0; cnt < EMAC_NUM_STATS; cnt++)
> + *addr++ = 0;
> +
> + /* No multicast addressing */
> + writel(0, &priv->adap_emac->MACHASH1);
> + writel(0, &priv->adap_emac->MACHASH2);
> +
> + writel(0x01, &priv->adap_emac->TXCONTROL);
> + writel(0x01, &priv->adap_emac->RXCONTROL);
> +
> + /* Create RX queue and set receive process in place */
> + priv->emac_rx_active_head = priv->emac_rx_desc;
> + for (cnt = 0; cnt < EMAC_MAX_RX_BUFFERS; cnt++) {
> + rx_desc->next = BD_TO_HW(rx_desc + 1);
> + rx_desc->buffer = &priv->emac_rx_buffers[cnt * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN)];
> + rx_desc->buff_off_len = EMAC_MAX_ETHERNET_PKT_SIZE;
> + rx_desc->pkt_flag_len = EMAC_CPPI_OWNERSHIP_BIT;
> + rx_desc++;
> + }
> +
> + /* Set the last descriptor's "next" parameter to 0 to end the RX desc list */
> + rx_desc--;
> + rx_desc->next = 0;
> + priv->emac_rx_active_tail = rx_desc;
> + priv->emac_rx_queue_active = 1;
> +
> + /* Enable TX/RX */
> + writel(EMAC_MAX_ETHERNET_PKT_SIZE, &priv->adap_emac->RXMAXLEN);
> + writel(0, &priv->adap_emac->RXBUFFEROFFSET);
> +
> + /* No fancy configs - Use this for promiscous for debug - EMAC_RXMBPENABLE_RXCAFEN_ENABLE */
> + writel(EMAC_RXMBPENABLE_RXBROADEN, &priv->adap_emac->RXMBPENABLE);
> +
> + /* Enable ch 0 only */
> + writel(0x01, &priv->adap_emac->RXUNICASTSET);
> +
> + /* Enable MII interface and full duplex mode (using RMMI) */
> + writel((EMAC_MACCONTROL_MIIEN_ENABLE |
> + EMAC_MACCONTROL_FULLDUPLEX_ENABLE |
> + EMAC_MACCONTROL_RMIISPEED_100),
> + &priv->adap_emac->MACCONTROL);
> +
> + /* Init MDIO & get link state */
> + clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
> + writel((clkdiv & 0xff) | MDIO_CONTROL_ENABLE | MDIO_CONTROL_FAULT,
> + &priv->adap_mdio->CONTROL);
> +
> + /* Start receive process */
> + writel(BD_TO_HW(priv->emac_rx_desc), &priv->adap_emac->RX0HDP);
> +
> + ret = miidev_wait_aneg(&priv->miidev);
> + if (ret)
> + return ret;
> +
> + ret = miidev_get_status(&priv->miidev);
> + if (ret < 0)
> + return ret;
> +
> + miidev_print_status(&priv->miidev);
> +
> + dev_dbg(priv->dev, "- emac_open\n");
> +
> + return 0;
> +}
> +
> +/* EMAC Channel Teardown */
> +static void davinci_eth_ch_teardown(struct davinci_emac_priv *priv, int ch)
> +{
> + dv_reg dly = 0xff;
> + dv_reg cnt;
> +
> + dev_dbg(priv->dev, "+ emac_ch_teardown\n");
> +
> + if (ch == EMAC_CH_TX) {
> + /* Init TX channel teardown */
> + writel(0, &priv->adap_emac->TXTEARDOWN);
> + for(cnt = 0; cnt != 0xfffffffc; cnt = readl(&priv->adap_emac->TX0CP)) {
> + /* Wait here for Tx teardown completion interrupt to occur
> + * Note: A task delay can be called here to pend rather than
> + * occupying CPU cycles - anyway it has been found that teardown
> + * takes very few cpu cycles and does not affect functionality */
> + dly--;
> + udelay(1);
> + if (dly == 0)
> + break;
> + }
> + writel(cnt, &priv->adap_emac->TX0CP);
> + writel(0, &priv->adap_emac->TX0HDP);
> + } else {
> + /* Init RX channel teardown */
> + writel(0, &priv->adap_emac->RXTEARDOWN);
> + for(cnt = 0; cnt != 0xfffffffc; cnt = readl(&priv->adap_emac->RX0CP)) {
> + /* Wait here for Rx teardown completion interrupt to occur
> + * Note: A task delay can be called here to pend rather than
> + * occupying CPU cycles - anyway it has been found that teardown
> + * takes very few cpu cycles and does not affect functionality */
> + dly--;
> + udelay(1);
> + if (dly == 0)
> + break;
> + }
> + writel(cnt, &priv->adap_emac->RX0CP);
> + writel(0, &priv->adap_emac->RX0HDP);
> + }
> +
> + dev_dbg(priv->dev, "- emac_ch_teardown\n");
> +}
> +
> +static void davinci_emac_halt(struct eth_device *edev)
> +{
> + struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
> +
> + dev_dbg(priv->dev, "+ emac_halt\n");
> +
> + davinci_eth_ch_teardown(priv, EMAC_CH_TX); /* TX Channel teardown */
> + davinci_eth_ch_teardown(priv, EMAC_CH_RX); /* RX Channel teardown */
> +
> + /* Reset EMAC module and disable interrupts in wrapper */
> + writel(1, &priv->adap_emac->SOFTRESET);
> + writel(1, &priv->adap_ewrap->softrst);
> +
> + writel(0, &priv->adap_ewrap->c0rxen);
> + writel(0, &priv->adap_ewrap->c1rxen);
> + writel(0, &priv->adap_ewrap->c2rxen);
> + writel(0, &priv->adap_ewrap->c0txen);
> + writel(0, &priv->adap_ewrap->c1txen);
> + writel(0, &priv->adap_ewrap->c2txen);
> + writel(0, &priv->adap_ewrap->c0miscen);
> + writel(0, &priv->adap_ewrap->c1miscen);
> + writel(0, &priv->adap_ewrap->c2miscen);
> +
> + dev_dbg(priv->dev, "- emac_halt\n");
> +}
> +
> +/*
> + * This function sends a single packet on the network and returns
> + * positive number (number of bytes transmitted) or negative for error
> + */
> +static int davinci_emac_send(struct eth_device *edev, void *packet, int length)
> +{
> + struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
> + uint64_t start = 0;
> + int ret_status = -1;
> +
> + dev_dbg(priv->dev, "+ emac_send (length %d)\n", length);
> +
> + /* Check packet size and if < EMAC_MIN_ETHERNET_PKT_SIZE, pad it up */
> + if (length < EMAC_MIN_ETHERNET_PKT_SIZE) {
> + length = EMAC_MIN_ETHERNET_PKT_SIZE;
> + }
> +
> + /* Populate the TX descriptor */
> + writel(0, &priv->emac_tx_desc->next);
> + writel((u_int8_t *) packet, &priv->emac_tx_desc->buffer);
> + writel((length & 0xffff), &priv->emac_tx_desc->buff_off_len);
> + writel(((length & 0xffff) | EMAC_CPPI_SOP_BIT |
> + EMAC_CPPI_OWNERSHIP_BIT |
> + EMAC_CPPI_EOP_BIT),
> + &priv->emac_tx_desc->pkt_flag_len);
> + dma_flush_range((ulong) packet, (ulong)packet + length);
> + /* Send the packet */
> + writel(BD_TO_HW(priv->emac_tx_desc), &priv->adap_emac->TX0HDP);
> +
> + /* Wait for packet to complete or link down */
> + start = get_time_ns();
You initialize a timeout value. That's good.
> + while (1) {
> + if (readl(&priv->adap_emac->TXINTSTATRAW) & 0x01) {
> + /* Acknowledge the TX descriptor */
> + writel(BD_TO_HW(priv->emac_tx_desc), &priv->adap_emac->TX0CP);
> + ret_status = length;
> + break;
> + }
> + }
Unfortunately it's unused.
> +
> + dev_dbg(priv->dev, "- emac_send (ret_status %i)\n", ret_status);
> + return ret_status;
> +}
> +
> +/*
> + * This function handles receipt of a packet from the network
> + */
> +static int davinci_emac_recv(struct eth_device *edev)
> +{
> + struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
> + emac_desc *rx_curr_desc;
> + emac_desc *curr_desc;
> + emac_desc *tail_desc;
> + unsigned char *pkt;
> + int status, len, ret = -1;
> +
> + dev_dbg(priv->dev, "+ emac_recv\n");
> +
> + rx_curr_desc = priv->emac_rx_active_head;
> + status = readl(&rx_curr_desc->pkt_flag_len);
> + if ((rx_curr_desc) && ((status & EMAC_CPPI_OWNERSHIP_BIT) == 0)) {
The code would be easier to read if you just invert the 'if' above and
return here.
> + if (status & EMAC_CPPI_RX_ERROR_FRAME) {
> + /* Error in packet - discard it and requeue desc */
> + dev_warn(priv->dev, "WARN: emac_rcv_pkt: Error in packet\n");
> + } else {
> + pkt = (unsigned char *)readl(&rx_curr_desc->buffer);
> + len = readl(&rx_curr_desc->buff_off_len) & 0xffff;
> + dev_dbg(priv->dev, "| emac_recv got packet (length %i)\n", len);
> + dma_inv_range((ulong)pkt,
> + (ulong)rx_curr_desc->buffer + len);
> + net_receive(pkt, len);
> + ret = len;
> + }
> +
> + /* Ack received packet descriptor */
> + writel(BD_TO_HW(rx_curr_desc), &priv->adap_emac->RX0CP);
> + curr_desc = rx_curr_desc;
> + priv->emac_rx_active_head = HW_TO_BD(readl(&rx_curr_desc->next));
> +
> + if (status & EMAC_CPPI_EOQ_BIT) {
> + if (priv->emac_rx_active_head) {
> + writel(BD_TO_HW(priv->emac_rx_active_head),
> + &priv->adap_emac->RX0HDP);
> + } else {
> + priv->emac_rx_queue_active = 0;
> + dev_info(priv->dev, "INFO:emac_rcv_packet: RX Queue not active\n");
> + }
> + }
> +
> + /* Recycle RX descriptor */
> + writel(EMAC_MAX_ETHERNET_PKT_SIZE, &rx_curr_desc->buff_off_len);
> + writel(EMAC_CPPI_OWNERSHIP_BIT, &rx_curr_desc->pkt_flag_len);
> + writel(0, &rx_curr_desc->next);
> +
> + if (priv->emac_rx_active_head == 0) {
> + dev_info(priv->dev, "INFO: emac_rcv_pkt: active queue head = 0\n");
> + priv->emac_rx_active_head = curr_desc;
> + priv->emac_rx_active_tail = curr_desc;
> + if (priv->emac_rx_queue_active != 0) {
> + writel(BD_TO_HW(priv->emac_rx_active_head), &priv->adap_emac->RX0HDP);
> + dev_info(priv->dev, "INFO: emac_rcv_pkt: active queue head = 0, HDP fired\n");
> + priv->emac_rx_queue_active = 1;
> + }
> + } else {
> + tail_desc = priv->emac_rx_active_tail;
> + priv->emac_rx_active_tail = curr_desc;
> + writel(BD_TO_HW(curr_desc), &tail_desc->next);
> + status = readl(&tail_desc->pkt_flag_len);
> + if (status & EMAC_CPPI_EOQ_BIT) {
> + writel(BD_TO_HW(curr_desc), &priv->adap_emac->RX0HDP);
> + status &= ~EMAC_CPPI_EOQ_BIT;
> + writel(status, &tail_desc->pkt_flag_len);
> + }
> + }
> + return ret;
> + }
> +
> + dev_dbg(priv->dev, "- emac_recv\n");
> +
> + return 0;
> +}
> +
> +static int davinci_emac_probe(struct device_d *dev)
> +{
> + struct davinci_emac_priv *priv;
> + int i;
> +
> + dev_dbg(dev, "+ emac_probe\n");
> +
> + priv = xzalloc(sizeof(*priv));
> + dev->priv = priv;
> +
> + priv->dev = dev;
> +
> + priv->adap_emac = (emac_regs *)EMAC_BASE_ADDR;
> + priv->adap_ewrap = (ewrap_regs *)EMAC_WRAPPER_BASE_ADDR;
> + priv->adap_mdio = (mdio_regs *)EMAC_MDIO_BASE_ADDR;
> +
> + /* EMAC descriptors */
> + priv->emac_rx_desc = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_RX_DESC_BASE);
> + priv->emac_tx_desc = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_TX_DESC_BASE);
> + priv->emac_rx_active_head = 0;
> + priv->emac_rx_active_tail = 0;
> + priv->emac_rx_queue_active = 0;
> +
> + /* Receive packet buffers */
> + priv->emac_rx_buffers = xmemalign(4096, EMAC_MAX_RX_BUFFERS * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN));
> +
> + /* PHY address for a discovered PHY (0xff - not found) */
> + priv->active_phy_addr = 0xff;
> +
> + priv->edev.priv = priv;
> + priv->edev.init = davinci_emac_init;
> + priv->edev.open = davinci_emac_open;
> + priv->edev.halt = davinci_emac_halt;
> + priv->edev.send = davinci_emac_send;
> + priv->edev.recv = davinci_emac_recv;
> + priv->edev.get_ethaddr = davinci_emac_get_ethaddr;
> + priv->edev.set_ethaddr = davinci_emac_set_ethaddr;
> + priv->edev.parent = dev;
> +
> + priv->regs = dev_request_mem_region(dev, 0);
> +
> + davinci_eth_mdio_enable(priv);
> +
> + for (i = 0; i < 256; i++) {
> + if (priv->adap_mdio->ALIVE)
readl
Also, use a regular is_timout() loop.
> + break;
> + udelay(1000);
> + }
> +
> + if (i >= 256) {
> + dev_err(dev, "No ETH PHY detected!\n");
> + }
> +
> + priv->miidev.read = davinci_miidev_read;
> + priv->miidev.write = davinci_miidev_write;
> + priv->miidev.address = 0x01;
> + priv->miidev.flags = MIIDEV_FORCE_LINK;
> + priv->miidev.edev = &priv->edev;
> + priv->miidev.parent = dev;
> +
> + mii_register(&priv->miidev);
> +
> + eth_register(&priv->edev);
> +
> + dev_dbg(dev, "- emac_probe\n");
> + return 0;
> +}
> +
> +static void davinci_emac_remove(struct device_d *dev)
> +{
> + struct davinci_emac_priv *priv = dev->priv;
> +
> + davinci_emac_halt(&priv->edev);
> +}
> +
> +static struct driver_d davinci_emac_driver = {
> + .name = "davinci_emac",
> + .probe = davinci_emac_probe,
> + .remove = davinci_emac_remove,
> +};
> +
> +static int davinci_emac_register(void)
> +{
> + register_driver(&davinci_emac_driver);
> + return 0;
> +}
> +
> +device_initcall(davinci_emac_register);
> diff --git a/drivers/net/davinci_emac.h b/drivers/net/davinci_emac.h
> new file mode 100644
> index 0000000..4e97ce5
> --- /dev/null
> +++ b/drivers/net/davinci_emac.h
> @@ -0,0 +1,331 @@
> +/*
> + * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
> + *
> + * Based on:
> + *
> + * ----------------------------------------------------------------------------
> + *
> + * dm644x_emac.h
> + *
> + * TI DaVinci (DM644X) EMAC peripheral driver header for DV-EVM
> + *
> + * Copyright (C) 2005 Texas Instruments.
> + *
> + * ----------------------------------------------------------------------------
> + *
> + * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
> + * ----------------------------------------------------------------------------
> +
> + * Modifications:
> + * ver. 1.0: Sep 2005, TI PSP Team - Created EMAC version for uBoot.
> + *
> + */
> +
> +#ifndef _DAVINCI_EMAC_H_
> +#define _DAVINCI_EMAC_H_
> +
> +/* PHY mask - set only those phy number bits where phy is/can be connected */
> +#define EMAC_MDIO_PHY_NUM 1
> +#define EMAC_MDIO_PHY_MASK (1 << EMAC_MDIO_PHY_NUM)
> +
> +/* Ethernet Min/Max packet size */
> +#define EMAC_MIN_ETHERNET_PKT_SIZE 60
> +#define EMAC_MAX_ETHERNET_PKT_SIZE 1518
> +#define EMAC_PKT_ALIGN 18 /* 1518 + 18 = 1536 (packet aligned on 32 byte boundry) */
> +
> +/* Number of RX packet buffers
> + * NOTE: Only 1 buffer supported as of now
> + */
> +#define EMAC_MAX_RX_BUFFERS 10
> +
> +typedef unsigned int dv_reg;
> +typedef unsigned int *dv_reg_p;
> +
> +/***********************************************
> + ******** Internally used macros ***************
> + ***********************************************/
> +
> +#define EMAC_CH_TX 1
> +#define EMAC_CH_RX 0
> +
> +/* Each descriptor occupies 4 words, lets start RX desc's at 0 and
> + * reserve space for 64 descriptors max
> + */
> +#define EMAC_RX_DESC_BASE 0x0
> +#define EMAC_TX_DESC_BASE 0x1000
> +
> +/* EMAC Teardown value */
> +#define EMAC_TEARDOWN_VALUE 0xfffffffc
> +
> +/* MII Status Register */
> +#define MII_STATUS_REG 1
> +
> +/* Number of statistics registers */
> +#define EMAC_NUM_STATS 36
> +
> +
> +/* EMAC Descriptor */
> +typedef struct
> +{
> + u_int32_t next; /* Pointer to next descriptor in chain */
> + u_int8_t *buffer; /* Pointer to data buffer */
> + u_int32_t buff_off_len; /* Buffer Offset(MSW) and Length(LSW) */
> + u_int32_t pkt_flag_len; /* Packet Flags(MSW) and Length(LSW) */
> +} emac_desc;
> +
> +/* CPPI bit positions */
> +#define EMAC_CPPI_SOP_BIT (0x80000000)
> +#define EMAC_CPPI_EOP_BIT (0x40000000)
> +#define EMAC_CPPI_OWNERSHIP_BIT (0x20000000)
> +#define EMAC_CPPI_EOQ_BIT (0x10000000)
> +#define EMAC_CPPI_TEARDOWN_COMPLETE_BIT (0x08000000)
> +#define EMAC_CPPI_PASS_CRC_BIT (0x04000000)
> +
> +#define EMAC_CPPI_RX_ERROR_FRAME (0x03fc0000)
> +
> +#define EMAC_MACCONTROL_MIIEN_ENABLE (0x20)
> +#define EMAC_MACCONTROL_FULLDUPLEX_ENABLE (0x1)
> +#define EMAC_MACCONTROL_GIGABIT_ENABLE (1 << 7)
> +#define EMAC_MACCONTROL_GIGFORCE (1 << 17)
> +#define EMAC_MACCONTROL_RMIISPEED_100 (1 << 15)
> +
> +#define EMAC_MAC_ADDR_MATCH (1 << 19)
> +#define EMAC_MAC_ADDR_IS_VALID (1 << 20)
> +
> +#define EMAC_RXMBPENABLE_RXCAFEN_ENABLE (0x200000)
> +#define EMAC_RXMBPENABLE_RXBROADEN (0x2000)
> +
> +
> +#define MDIO_CONTROL_IDLE (0x80000000)
> +#define MDIO_CONTROL_ENABLE (0x40000000)
> +#define MDIO_CONTROL_FAULT_ENABLE (0x40000)
> +#define MDIO_CONTROL_FAULT (0x80000)
> +#define MDIO_USERACCESS0_GO (0x80000000)
> +#define MDIO_USERACCESS0_WRITE_READ (0x0)
> +#define MDIO_USERACCESS0_WRITE_WRITE (0x40000000)
> +#define MDIO_USERACCESS0_ACK (0x20000000)
> +
> +/* Ethernet MAC Registers Structure */
> +typedef struct {
No typedef for structs please.
> + dv_reg TXIDVER;
Or better, no typedefs at all ;)
Sascha
--
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] 24+ messages in thread
* [PATCH 09/10] omap3: allow enabling clocks for UART3, MMC1 and SPI
2012-09-03 11:45 Prepare support for TI AM35xx Jan Luebbe
` (7 preceding siblings ...)
2012-09-03 11:46 ` [PATCH 08/10] drivers/net: add driver for the EMAC device found in some TI SoCs Jan Luebbe
@ 2012-09-03 11:46 ` Jan Luebbe
2012-09-04 8:48 ` Sascha Hauer
2012-09-03 11:46 ` [PATCH 10/10] drivers/spi: add driver for the Multichannel SPI controller found in TI SoCs Jan Luebbe
9 siblings, 1 reply; 24+ messages in thread
From: Jan Luebbe @ 2012-09-03 11:46 UTC (permalink / raw)
To: barebox
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
---
arch/arm/mach-omap/Kconfig | 4 ++++
arch/arm/mach-omap/omap3_clock.c | 35 +++++++++++++++++++++++++----------
2 files changed, 29 insertions(+), 10 deletions(-)
diff --git a/arch/arm/mach-omap/Kconfig b/arch/arm/mach-omap/Kconfig
index a781287..82fa46b 100644
--- a/arch/arm/mach-omap/Kconfig
+++ b/arch/arm/mach-omap/Kconfig
@@ -61,6 +61,10 @@ config OMAP_CLOCK_UART3
bool
config OMAP_CLOCK_I2C
bool
+config OMAP_CLOCK_MMC1
+ bool
+config OMAP_CLOCK_SPI
+ bool
# Blind enable all possible clocks.. think twice before you do this.
config OMAP_CLOCK_ALL
diff --git a/arch/arm/mach-omap/omap3_clock.c b/arch/arm/mach-omap/omap3_clock.c
index 646235e..bfaa1cf 100644
--- a/arch/arm/mach-omap/omap3_clock.c
+++ b/arch/arm/mach-omap/omap3_clock.c
@@ -674,16 +674,31 @@ static void per_clocks_enable(void)
/* Enable the ICLK for 32K Sync Timer as its used in udelay */
sr32(CM_REG(ICLKEN_WKUP), 2, 1, 0x1);
-#ifdef CONFIG_OMAP_CLOCK_UART
- /* Enable UART1 clocks */
- sr32(CM_REG(FCLKEN1_CORE), 13, 1, 0x1);
- sr32(CM_REG(ICLKEN1_CORE), 13, 1, 0x1);
-#endif
-#ifdef CONFIG_OMAP_CLOCK_I2C
- /* Turn on all 3 I2C clocks */
- sr32(CM_REG(FCLKEN1_CORE), 15, 3, 0x7);
- sr32(CM_REG(ICLKEN1_CORE), 15, 3, 0x7); /* I2C1,2,3 = on */
-#endif
+ if (IS_ENABLED(CONFIG_OMAP_CLOCK_UART)) {
+ /* Enable UART1 clocks */
+ sr32(CM_REG(FCLKEN1_CORE), 13, 1, 0x1);
+ sr32(CM_REG(ICLKEN1_CORE), 13, 1, 0x1);
+ }
+ if (IS_ENABLED(CONFIG_OMAP_CLOCK_UART3)) {
+ /* Enable UART3 clocks */
+ sr32(CM_REG(FCLKEN_PER), 11, 1, 0x1);
+ sr32(CM_REG(ICLKEN_PER), 11, 1, 0x1);
+ }
+ if (IS_ENABLED(CONFIG_OMAP_CLOCK_I2C)) {
+ /* Turn on all 3 I2C clocks */
+ sr32(CM_REG(FCLKEN1_CORE), 15, 3, 0x7);
+ sr32(CM_REG(ICLKEN1_CORE), 15, 3, 0x7); /* I2C1,2,3 = on */
+ }
+ if (IS_ENABLED(CONFIG_OMAP_CLOCK_MMC1)) {
+ /* Enable MMC1 clocks */
+ sr32(CM_REG(FCLKEN1_CORE), 24, 1, 0x1);
+ sr32(CM_REG(ICLKEN1_CORE), 24, 1, 0x1);
+ }
+ if (IS_ENABLED(CONFIG_OMAP_CLOCK_SPI)) {
+ /* Enable SPI clocks */
+ sr32(CM_REG(FCLKEN1_CORE), 18, 4, 0xf);
+ sr32(CM_REG(ICLKEN1_CORE), 18, 4, 0xf);
+ }
#ifdef CONFIG_OMAP_CLOCK_ALL
#define FCK_IVA2_ON 0x00000001
--
1.7.10.4
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^ permalink raw reply [flat|nested] 24+ messages in thread* Re: [PATCH 09/10] omap3: allow enabling clocks for UART3, MMC1 and SPI
2012-09-03 11:46 ` [PATCH 09/10] omap3: allow enabling clocks for UART3, MMC1 and SPI Jan Luebbe
@ 2012-09-04 8:48 ` Sascha Hauer
2012-09-05 9:28 ` Jan Lübbe
0 siblings, 1 reply; 24+ messages in thread
From: Sascha Hauer @ 2012-09-04 8:48 UTC (permalink / raw)
To: Jan Luebbe; +Cc: barebox
On Mon, Sep 03, 2012 at 01:46:04PM +0200, Jan Luebbe wrote:
> Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
> ---
> arch/arm/mach-omap/Kconfig | 4 ++++
> arch/arm/mach-omap/omap3_clock.c | 35 +++++++++++++++++++++++++----------
> 2 files changed, 29 insertions(+), 10 deletions(-)
>
> diff --git a/arch/arm/mach-omap/Kconfig b/arch/arm/mach-omap/Kconfig
> index a781287..82fa46b 100644
> --- a/arch/arm/mach-omap/Kconfig
> +++ b/arch/arm/mach-omap/Kconfig
> @@ -61,6 +61,10 @@ config OMAP_CLOCK_UART3
> bool
> config OMAP_CLOCK_I2C
> bool
> +config OMAP_CLOCK_MMC1
> + bool
> +config OMAP_CLOCK_SPI
> + bool
A Kconfig entry for enabling a clock is overkill. Please do not continue
this.
Right now we have:
config OMAP_CLOCK_UART
bool
config OMAP_CLOCK_UART2
bool
config OMAP_CLOCK_UART3
bool
config OMAP_CLOCK_I2C
bool
And it's completely unused, so can be simply removed.
Sascha
--
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] 24+ messages in thread
* Re: [PATCH 09/10] omap3: allow enabling clocks for UART3, MMC1 and SPI
2012-09-04 8:48 ` Sascha Hauer
@ 2012-09-05 9:28 ` Jan Lübbe
0 siblings, 0 replies; 24+ messages in thread
From: Jan Lübbe @ 2012-09-05 9:28 UTC (permalink / raw)
To: Sascha Hauer; +Cc: barebox-request
On Tue, 2012-09-04 at 10:48 +0200, Sascha Hauer wrote:
> On Mon, Sep 03, 2012 at 01:46:04PM +0200, Jan Luebbe wrote:
> > Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
> > ---
> > arch/arm/mach-omap/Kconfig | 4 ++++
> > arch/arm/mach-omap/omap3_clock.c | 35 +++++++++++++++++++++++++----------
> > 2 files changed, 29 insertions(+), 10 deletions(-)
> >
> > diff --git a/arch/arm/mach-omap/Kconfig b/arch/arm/mach-omap/Kconfig
> > index a781287..82fa46b 100644
> > --- a/arch/arm/mach-omap/Kconfig
> > +++ b/arch/arm/mach-omap/Kconfig
> > @@ -61,6 +61,10 @@ config OMAP_CLOCK_UART3
> > bool
> > config OMAP_CLOCK_I2C
> > bool
> > +config OMAP_CLOCK_MMC1
> > + bool
> > +config OMAP_CLOCK_SPI
> > + bool
>
> A Kconfig entry for enabling a clock is overkill. Please do not continue
> this.
>
> Right now we have:
>
> config OMAP_CLOCK_UART
> bool
> config OMAP_CLOCK_UART2
> bool
> config OMAP_CLOCK_UART3
> bool
> config OMAP_CLOCK_I2C
> bool
>
> And it's completely unused, so can be simply removed.
What should I do instead? Enable all clocks? Or enable just the clocks
for which drivers have been enabled in Kconfig?
Thanks,
Jan
--
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^ permalink raw reply [flat|nested] 24+ messages in thread
* [PATCH 10/10] drivers/spi: add driver for the Multichannel SPI controller found in TI SoCs
2012-09-03 11:45 Prepare support for TI AM35xx Jan Luebbe
` (8 preceding siblings ...)
2012-09-03 11:46 ` [PATCH 09/10] omap3: allow enabling clocks for UART3, MMC1 and SPI Jan Luebbe
@ 2012-09-03 11:46 ` Jan Luebbe
2012-09-03 16:32 ` Jean-Christophe PLAGNIOL-VILLARD
2012-09-04 8:58 ` Sascha Hauer
9 siblings, 2 replies; 24+ messages in thread
From: Jan Luebbe @ 2012-09-03 11:46 UTC (permalink / raw)
To: barebox
Also create devices for OMAP3.
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
---
arch/arm/mach-omap/include/mach/mcspi.h | 11 +
arch/arm/mach-omap/include/mach/omap3-devices.h | 34 ++
drivers/spi/Kconfig | 6 +
drivers/spi/Makefile | 1 +
drivers/spi/omap3_spi.c | 403 +++++++++++++++++++++++
drivers/spi/omap3_spi.h | 100 ++++++
6 files changed, 555 insertions(+)
create mode 100644 arch/arm/mach-omap/include/mach/mcspi.h
create mode 100644 arch/arm/mach-omap/include/mach/omap3-devices.h
create mode 100644 drivers/spi/omap3_spi.c
create mode 100644 drivers/spi/omap3_spi.h
diff --git a/arch/arm/mach-omap/include/mach/mcspi.h b/arch/arm/mach-omap/include/mach/mcspi.h
new file mode 100644
index 0000000..dbde67a
--- /dev/null
+++ b/arch/arm/mach-omap/include/mach/mcspi.h
@@ -0,0 +1,11 @@
+#ifndef __OMAP_MCSPI_H
+#define __OMAP_MCSPI_H
+
+#define OMAP3_MCSPI1_BASE 0x48098000
+#define OMAP3_MCSPI2_BASE 0x4809A000
+#define OMAP3_MCSPI3_BASE 0x480B8000
+#define OMAP3_MCSPI4_BASE 0x480BA000
+
+int mcspi_devices_init(void);
+
+#endif /* __OMAP_MCSPI_H */
diff --git a/arch/arm/mach-omap/include/mach/omap3-devices.h b/arch/arm/mach-omap/include/mach/omap3-devices.h
new file mode 100644
index 0000000..2db8583
--- /dev/null
+++ b/arch/arm/mach-omap/include/mach/omap3-devices.h
@@ -0,0 +1,34 @@
+#include <driver.h>
+#include <sizes.h>
+
+#include <mach/mcspi.h>
+
+/* the device numbering is the same as in the device tree */
+
+static inline struct device_d *omap3_add_spi1(void)
+{
+ return add_generic_device("omap3_spi", 1, NULL,
+ OMAP3_MCSPI1_BASE, SZ_4K,
+ IORESOURCE_MEM, NULL);
+}
+
+static inline struct device_d *omap3_add_spi2(void)
+{
+ return add_generic_device("omap3_spi", 2, NULL,
+ OMAP3_MCSPI2_BASE, SZ_4K,
+ IORESOURCE_MEM, NULL);
+}
+
+static inline struct device_d *omap3_add_spi3(void)
+{
+ return add_generic_device("omap3_spi", 3, NULL,
+ OMAP3_MCSPI3_BASE, SZ_4K,
+ IORESOURCE_MEM, NULL);
+}
+
+static inline struct device_d *omap3_add_spi4(void)
+{
+ return add_generic_device("omap3_spi", 4, NULL,
+ OMAP3_MCSPI4_BASE, SZ_4K,
+ IORESOURCE_MEM, NULL);
+}
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index a249b81..ba1b948 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -34,4 +34,10 @@ config DRIVER_SPI_ATMEL
depends on ARCH_AT91
depends on SPI
+
+config DRIVER_SPI_OMAP3
+ bool "OMAP3 McSPI Master driver"
+ depends on ARCH_OMAP3
+ depends on SPI
+
endmenu
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 101652f..b53061e 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_SPI) += spi.o
obj-$(CONFIG_DRIVER_SPI_IMX) += imx_spi.o
obj-$(CONFIG_DRIVER_SPI_ALTERA) += altera_spi.o
obj-$(CONFIG_DRIVER_SPI_ATMEL) += atmel_spi.o
+obj-$(CONFIG_DRIVER_SPI_OMAP3) += omap3_spi.o
diff --git a/drivers/spi/omap3_spi.c b/drivers/spi/omap3_spi.c
new file mode 100644
index 0000000..eadb78d
--- /dev/null
+++ b/drivers/spi/omap3_spi.c
@@ -0,0 +1,403 @@
+/*
+ * Copyright (C) 2012 Jan Luebbe <j.luebbe@pengutronix.de>
+ *
+ * Copyright (C) 2010 Dirk Behme <dirk.behme@googlemail.com>
+ *
+ * Driver for McSPI controller on OMAP3. Based on davinci_spi.c
+ * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Copyright (C) 2007 Atmel Corporation
+ *
+ * Parts taken from linux/drivers/spi/omap2_mcspi.c
+ * Copyright (C) 2005, 2006 Nokia Corporation
+ *
+ * Modified by Ruslan Araslanov <ruslan.araslanov@vitecmm.com>
+ *
+ * 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 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 <common.h>
+#include <init.h>
+#include <driver.h>
+#include <errno.h>
+#include <spi/spi.h>
+#include <malloc.h>
+#include <io.h>
+#include "omap3_spi.h"
+
+#define WORD_LEN 8
+#define SPI_WAIT_TIMEOUT 30000000
+
+#define SPI_XFER_BEGIN 0x01 /* Assert CS before transfer */
+#define SPI_XFER_END 0x02 /* Deassert CS after transfer */
+
+static void spi_reset(struct spi_master *master)
+{
+ struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
+ struct mcspi __iomem *regs = omap3_master->regs;
+ unsigned int tmp;
+
+ writel(OMAP3_MCSPI_SYSCONFIG_SOFTRESET, ®s->sysconfig);
+ do {
+ tmp = readl(®s->sysstatus);
+ } while (!(tmp & OMAP3_MCSPI_SYSSTATUS_RESETDONE));
+
+ writel(OMAP3_MCSPI_SYSCONFIG_AUTOIDLE |
+ OMAP3_MCSPI_SYSCONFIG_ENAWAKEUP |
+ OMAP3_MCSPI_SYSCONFIG_SMARTIDLE,
+ ®s->sysconfig);
+
+ writel(OMAP3_MCSPI_WAKEUPENABLE_WKEN, ®s->wakeupenable);
+}
+
+int spi_claim_bus(struct spi_device *spi)
+{
+ struct spi_master *master = spi->master;
+ struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
+ struct mcspi __iomem *regs = omap3_master->regs;
+ unsigned int conf, div = 0;
+
+ /* McSPI global module configuration */
+
+ /*
+ * setup when switching from (reset default) slave mode
+ * to single-channel master mode
+ */
+ conf = readl(®s->modulctrl);
+ conf &= ~(OMAP3_MCSPI_MODULCTRL_STEST | OMAP3_MCSPI_MODULCTRL_MS);
+ conf |= OMAP3_MCSPI_MODULCTRL_SINGLE;
+ writel(conf, ®s->modulctrl);
+
+ /* McSPI individual channel configuration */
+
+ /* Calculate clock divisor. Valid range: 0x0 - 0xC ( /1 - /4096 ) */
+ if (spi->max_speed_hz) {
+ while (div <= 0xC && (OMAP3_MCSPI_MAX_FREQ / (1 << div))
+ > spi->max_speed_hz)
+ div++;
+ } else
+ div = 0xC;
+
+ conf = readl(®s->channel[spi->chip_select].chconf);
+
+ /* standard 4-wire master mode: SCK, MOSI/out, MISO/in, nCS
+ * REVISIT: this controller could support SPI_3WIRE mode.
+ */
+ conf &= ~(OMAP3_MCSPI_CHCONF_IS|OMAP3_MCSPI_CHCONF_DPE1);
+ conf |= OMAP3_MCSPI_CHCONF_DPE0;
+
+ /* wordlength */
+ conf &= ~OMAP3_MCSPI_CHCONF_WL_MASK;
+ conf |= (WORD_LEN - 1) << 7;
+
+ /* set chipselect polarity; manage with FORCE */
+ if (!(spi->mode & SPI_CS_HIGH))
+ conf |= OMAP3_MCSPI_CHCONF_EPOL; /* active-low; normal */
+ else
+ conf &= ~OMAP3_MCSPI_CHCONF_EPOL;
+
+ /* set clock divisor */
+ conf &= ~OMAP3_MCSPI_CHCONF_CLKD_MASK;
+ conf |= div << 2;
+
+ /* set SPI mode 0..3 */
+ if (spi->mode & SPI_CPOL)
+ conf |= OMAP3_MCSPI_CHCONF_POL;
+ else
+ conf &= ~OMAP3_MCSPI_CHCONF_POL;
+ if (spi->mode & SPI_CPHA)
+ conf |= OMAP3_MCSPI_CHCONF_PHA;
+ else
+ conf &= ~OMAP3_MCSPI_CHCONF_PHA;
+
+ /* Transmit & receive mode */
+ conf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
+
+ writel(conf, ®s->channel[spi->chip_select].chconf);
+ readl(®s->channel[spi->chip_select].chconf);
+
+ return 0;
+}
+
+int omap3_spi_write(struct spi_device *spi, unsigned int len, const u8 *txp,
+ unsigned long flags)
+{
+ struct spi_master *master = spi->master;
+ struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
+ struct mcspi __iomem *regs = omap3_master->regs;
+ int i;
+ int timeout = SPI_WAIT_TIMEOUT;
+ int chconf = readl(®s->channel[spi->chip_select].chconf);
+
+ if (flags & SPI_XFER_BEGIN)
+ writel(OMAP3_MCSPI_CHCTRL_EN,
+ ®s->channel[spi->chip_select].chctrl);
+
+ chconf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
+ chconf |= OMAP3_MCSPI_CHCONF_TRM_TX_ONLY;
+ chconf |= OMAP3_MCSPI_CHCONF_FORCE;
+ writel(chconf, ®s->channel[spi->chip_select].chconf);
+ readl(®s->channel[spi->chip_select].chconf);
+
+ for (i = 0; i < len; i++) {
+ /* wait till TX register is empty (TXS == 1) */
+ while (!(readl(®s->channel[spi->chip_select].chstat) &
+ OMAP3_MCSPI_CHSTAT_TXS)) {
+ if (--timeout <= 0) {
+ printf("SPI TXS timed out, status=0x%08x\n",
+ readl(®s->channel[spi->chip_select].chstat));
+ return -1;
+ }
+ }
+ /* Write the data */
+ writel(txp[i], ®s->channel[spi->chip_select].tx);
+ }
+
+ if (flags & SPI_XFER_END) {
+ /* wait to finish of transfer */
+ while (!(readl(®s->channel[spi->chip_select].chstat) &
+ OMAP3_MCSPI_CHSTAT_EOT));
+
+ chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
+ writel(chconf, ®s->channel[spi->chip_select].chconf);
+
+ writel(0, ®s->channel[spi->chip_select].chctrl);
+ }
+
+ while (!(readl(®s->channel[spi->chip_select].chstat) &
+ OMAP3_MCSPI_CHSTAT_TXS));
+ while (!(readl(®s->channel[spi->chip_select].chstat) &
+ OMAP3_MCSPI_CHSTAT_EOT));
+
+ return 0;
+}
+
+int omap3_spi_read(struct spi_device *spi, unsigned int len, u8 *rxp,
+ unsigned long flags)
+{
+ struct spi_master *master = spi->master;
+ struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
+ struct mcspi __iomem *regs = omap3_master->regs;
+ int i;
+ int timeout = SPI_WAIT_TIMEOUT;
+ int chconf = readl(®s->channel[spi->chip_select].chconf);
+
+ if (flags & SPI_XFER_BEGIN)
+ writel(OMAP3_MCSPI_CHCTRL_EN,
+ ®s->channel[spi->chip_select].chctrl);
+
+ chconf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
+ chconf |= OMAP3_MCSPI_CHCONF_TRM_RX_ONLY;
+ chconf |= OMAP3_MCSPI_CHCONF_FORCE;
+ writel(chconf, ®s->channel[spi->chip_select].chconf);
+ readl(®s->channel[spi->chip_select].chconf);
+ writel(0, ®s->channel[spi->chip_select].tx);
+
+ for (i = 0; i < len; i++) {
+ /* Wait till RX register contains data (RXS == 1) */
+ while (!(readl(®s->channel[spi->chip_select].chstat) &
+ OMAP3_MCSPI_CHSTAT_RXS)) {
+ if (--timeout <= 0) {
+ printf("SPI RXS timed out, status=0x%08x\n",
+ readl(®s->channel[spi->chip_select].chstat));
+ return -1;
+ }
+ }
+ /* Read the data */
+ rxp[i] = readl(®s->channel[spi->chip_select].rx);
+ }
+
+ if (flags & SPI_XFER_END) {
+ chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
+ writel(chconf, ®s->channel[spi->chip_select].chconf);
+ readl(®s->channel[spi->chip_select].chconf);
+
+ writel(0, ®s->channel[spi->chip_select].chctrl);
+ }
+
+ return 0;
+}
+
+int spi_xfer(struct spi_device *spi, struct spi_transfer *t, unsigned long flags)
+{
+ struct spi_master *master = spi->master;
+ struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
+ struct mcspi __iomem *regs = omap3_master->regs;
+ unsigned int len = t->len;
+ int ret = -1;
+ const u8 *txp = t->tx_buf; /* can be NULL for read operation */
+ u8 *rxp = t->rx_buf; /* can be NULL for write operation */
+
+ if (len == 0) { /* only change CS */
+ int chconf = readl(®s->channel[spi->chip_select].chconf);
+
+ if (flags & SPI_XFER_BEGIN) {
+ writel(OMAP3_MCSPI_CHCTRL_EN,
+ ®s->channel[spi->chip_select].chctrl);
+ chconf |= OMAP3_MCSPI_CHCONF_FORCE;
+ writel(chconf,
+ ®s->channel[spi->chip_select].chconf);
+ readl(®s->channel[spi->chip_select].chconf);
+ }
+
+ if (flags & SPI_XFER_END) {
+ chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
+ writel(chconf,
+ ®s->channel[spi->chip_select].chconf);
+ writel(0, ®s->channel[spi->chip_select].chctrl);
+ readl(®s->channel[spi->chip_select].chconf);
+ }
+
+ ret = 0;
+ } else {
+ if (t->tx_buf != NULL)
+ ret = omap3_spi_write(spi, len, txp, flags);
+
+ if (t->rx_buf != NULL)
+ ret = omap3_spi_read(spi, len, rxp, flags);
+ }
+ return ret;
+}
+
+static int omap3_spi_transfer(struct spi_device *spi, struct spi_message *mesg)
+{
+ struct spi_master *master = spi->master;
+ struct spi_transfer *t, *t_first, *t_last = NULL;
+ unsigned long flags;
+ int ret = 0;
+
+ ret = spi_claim_bus(spi);
+ if (ret)
+ return ret;
+
+ if (list_empty(&mesg->transfers))
+ return 0;
+
+ t_first = list_first_entry(&mesg->transfers, struct spi_transfer, transfer_list);
+ t_last = list_last_entry(&mesg->transfers, struct spi_transfer, transfer_list);
+
+ mesg->actual_length = 0;
+
+ dev_dbg(master->dev, "transfer start actual_length=%i\n", mesg->actual_length);
+ list_for_each_entry(t, &mesg->transfers, transfer_list) {
+ dev_dbg(master->dev,
+ " xfer %p: len %u tx %p rx %p\n",
+ t, t->len, t->tx_buf, t->rx_buf);
+ flags = 0;
+ if (t == t_first)
+ flags |= SPI_XFER_BEGIN;
+ if (t == t_last)
+ flags |= SPI_XFER_END;
+ spi_xfer(spi, t, flags);
+ mesg->actual_length += t->len;
+ }
+ dev_dbg(master->dev, "transfer done actual_length=%i\n", mesg->actual_length);
+
+ return ret;
+}
+
+static int omap3_spi_setup(struct spi_device *spi)
+{
+ struct spi_master *master = spi->master;
+
+ if (((master->bus_num == 0) && (spi->chip_select > 3)) ||
+ ((master->bus_num == 1) && (spi->chip_select > 1)) ||
+ ((master->bus_num == 2) && (spi->chip_select > 1)) ||
+ ((master->bus_num == 3) && (spi->chip_select > 0))) {
+ printf("SPI error: unsupported chip select %i \
+ on bus %i\n", spi->chip_select, master->bus_num);
+ return -1;
+ }
+
+ if (spi->max_speed_hz > OMAP3_MCSPI_MAX_FREQ) {
+ printf("SPI error: unsupported frequency %i Hz. \
+ Max frequency is 48 Mhz\n", spi->max_speed_hz);
+ return -1;
+ }
+
+ if (spi->mode > SPI_MODE_3) {
+ printf("SPI error: unsupported SPI mode %i\n", spi->mode);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int omap3_spi_probe(struct device_d *dev)
+{
+ struct spi_master *master;
+ struct omap3_spi_master *omap3_master;
+
+ omap3_master = xzalloc(sizeof(*omap3_master));
+
+ master = &omap3_master->master;
+ master->dev = dev;
+
+ /*
+ * OMAP3 McSPI (MultiChannel SPI) has 4 busses (modules)
+ * with different number of chip selects (CS, channels):
+ * McSPI1 has 4 CS (bus 0, cs 0 - 3)
+ * McSPI2 has 2 CS (bus 1, cs 0 - 1)
+ * McSPI3 has 2 CS (bus 2, cs 0 - 1)
+ * McSPI4 has 1 CS (bus 3, cs 0)
+ */
+
+ master->bus_num = dev->id;
+ switch (master->bus_num) {
+ case 1:
+ master->num_chipselect = 4;
+ break;
+ case 2:
+ master->num_chipselect = 2;
+ break;
+ case 3:
+ master->num_chipselect = 2;
+ break;
+ case 4:
+ master->num_chipselect = 1;
+ break;
+ default:
+ printf("SPI error: unsupported bus %i. \
+ Supported busses 1 - 4\n", master->bus_num);
+ return -ENODEV;
+ }
+ master->setup = omap3_spi_setup;
+ master->transfer = omap3_spi_transfer;
+
+ omap3_master->regs = (struct mcspi *)dev_request_mem_region(dev, 0);;
+
+ spi_reset(master);
+
+ spi_register_master(master);
+
+ return 0;
+}
+
+static struct driver_d omap3_spi_driver = {
+ .name = "omap3_spi",
+ .probe = omap3_spi_probe,
+};
+
+static int omap3_spi_init(void)
+{
+ return register_driver(&omap3_spi_driver);
+}
+
+device_initcall(omap3_spi_init);
diff --git a/drivers/spi/omap3_spi.h b/drivers/spi/omap3_spi.h
new file mode 100644
index 0000000..2ad8ef7
--- /dev/null
+++ b/drivers/spi/omap3_spi.h
@@ -0,0 +1,100 @@
+/*
+ * Register definitions for the OMAP3 McSPI Controller
+ *
+ * Copyright (C) 2010 Dirk Behme <dirk.behme@googlemail.com>
+ *
+ * Parts taken from linux/drivers/spi/omap2_mcspi.c
+ * Copyright (C) 2005, 2006 Nokia Corporation
+ *
+ * Modified by Ruslan Araslanov <ruslan.araslanov@vitecmm.com>
+ *
+ * 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 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
+ */
+
+#ifndef _OMAP3_SPI_H_
+#define _OMAP3_SPI_H_
+
+#define OMAP3_MCSPI_MAX_FREQ 48000000
+
+/* OMAP3 McSPI registers */
+struct mcspi_channel {
+ unsigned int chconf; /* 0x2C, 0x40, 0x54, 0x68 */
+ unsigned int chstat; /* 0x30, 0x44, 0x58, 0x6C */
+ unsigned int chctrl; /* 0x34, 0x48, 0x5C, 0x70 */
+ unsigned int tx; /* 0x38, 0x4C, 0x60, 0x74 */
+ unsigned int rx; /* 0x3C, 0x50, 0x64, 0x78 */
+};
+
+struct mcspi {
+ unsigned char res1[0x10];
+ unsigned int sysconfig; /* 0x10 */
+ unsigned int sysstatus; /* 0x14 */
+ unsigned int irqstatus; /* 0x18 */
+ unsigned int irqenable; /* 0x1C */
+ unsigned int wakeupenable; /* 0x20 */
+ unsigned int syst; /* 0x24 */
+ unsigned int modulctrl; /* 0x28 */
+ struct mcspi_channel channel[4]; /* channel0: 0x2C - 0x3C, bus 0 & 1 & 2 & 3 */
+ /* channel1: 0x40 - 0x50, bus 0 & 1 */
+ /* channel2: 0x54 - 0x64, bus 0 & 1 */
+ /* channel3: 0x68 - 0x78, bus 0 */
+};
+
+/* per-register bitmasks */
+#define OMAP3_MCSPI_SYSCONFIG_SMARTIDLE (2 << 3)
+#define OMAP3_MCSPI_SYSCONFIG_ENAWAKEUP (1 << 2)
+#define OMAP3_MCSPI_SYSCONFIG_AUTOIDLE (1 << 0)
+#define OMAP3_MCSPI_SYSCONFIG_SOFTRESET (1 << 1)
+
+#define OMAP3_MCSPI_SYSSTATUS_RESETDONE (1 << 0)
+
+#define OMAP3_MCSPI_MODULCTRL_SINGLE (1 << 0)
+#define OMAP3_MCSPI_MODULCTRL_MS (1 << 2)
+#define OMAP3_MCSPI_MODULCTRL_STEST (1 << 3)
+
+#define OMAP3_MCSPI_CHCONF_PHA (1 << 0)
+#define OMAP3_MCSPI_CHCONF_POL (1 << 1)
+#define OMAP3_MCSPI_CHCONF_CLKD_MASK (0x0f << 2)
+#define OMAP3_MCSPI_CHCONF_EPOL (1 << 6)
+#define OMAP3_MCSPI_CHCONF_WL_MASK (0x1f << 7)
+#define OMAP3_MCSPI_CHCONF_TRM_RX_ONLY (0x01 << 12)
+#define OMAP3_MCSPI_CHCONF_TRM_TX_ONLY (0x02 << 12)
+#define OMAP3_MCSPI_CHCONF_TRM_MASK (0x03 << 12)
+#define OMAP3_MCSPI_CHCONF_DMAW (1 << 14)
+#define OMAP3_MCSPI_CHCONF_DMAR (1 << 15)
+#define OMAP3_MCSPI_CHCONF_DPE0 (1 << 16)
+#define OMAP3_MCSPI_CHCONF_DPE1 (1 << 17)
+#define OMAP3_MCSPI_CHCONF_IS (1 << 18)
+#define OMAP3_MCSPI_CHCONF_TURBO (1 << 19)
+#define OMAP3_MCSPI_CHCONF_FORCE (1 << 20)
+
+#define OMAP3_MCSPI_CHSTAT_RXS (1 << 0)
+#define OMAP3_MCSPI_CHSTAT_TXS (1 << 1)
+#define OMAP3_MCSPI_CHSTAT_EOT (1 << 2)
+
+#define OMAP3_MCSPI_CHCTRL_EN (1 << 0)
+
+#define OMAP3_MCSPI_WAKEUPENABLE_WKEN (1 << 0)
+
+struct omap3_spi_master {
+ struct spi_master master;
+ struct mcspi __iomem *regs;
+};
+
+#endif /* _OMAP3_SPI_H_ */
--
1.7.10.4
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^ permalink raw reply [flat|nested] 24+ messages in thread* Re: [PATCH 10/10] drivers/spi: add driver for the Multichannel SPI controller found in TI SoCs
2012-09-03 11:46 ` [PATCH 10/10] drivers/spi: add driver for the Multichannel SPI controller found in TI SoCs Jan Luebbe
@ 2012-09-03 16:32 ` Jean-Christophe PLAGNIOL-VILLARD
2012-09-04 8:58 ` Sascha Hauer
1 sibling, 0 replies; 24+ messages in thread
From: Jean-Christophe PLAGNIOL-VILLARD @ 2012-09-03 16:32 UTC (permalink / raw)
To: Jan Luebbe; +Cc: barebox
On 13:46 Mon 03 Sep , Jan Luebbe wrote:
> Also create devices for OMAP3.
>
> Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
> ---
> arch/arm/mach-omap/include/mach/mcspi.h | 11 +
> arch/arm/mach-omap/include/mach/omap3-devices.h | 34 ++
> drivers/spi/Kconfig | 6 +
> drivers/spi/Makefile | 1 +
> drivers/spi/omap3_spi.c | 403 +++++++++++++++++++++++
> drivers/spi/omap3_spi.h | 100 ++++++
> 6 files changed, 555 insertions(+)
> create mode 100644 arch/arm/mach-omap/include/mach/mcspi.h
> create mode 100644 arch/arm/mach-omap/include/mach/omap3-devices.h
> create mode 100644 drivers/spi/omap3_spi.c
> create mode 100644 drivers/spi/omap3_spi.h
>
> diff --git a/arch/arm/mach-omap/include/mach/mcspi.h b/arch/arm/mach-omap/include/mach/mcspi.h
> new file mode 100644
> index 0000000..dbde67a
> --- /dev/null
> +++ b/arch/arm/mach-omap/include/mach/mcspi.h
> @@ -0,0 +1,11 @@
> +#ifndef __OMAP_MCSPI_H
> +#define __OMAP_MCSPI_H
> +
> +#define OMAP3_MCSPI1_BASE 0x48098000
> +#define OMAP3_MCSPI2_BASE 0x4809A000
> +#define OMAP3_MCSPI3_BASE 0x480B8000
> +#define OMAP3_MCSPI4_BASE 0x480BA000
> +
> +int mcspi_devices_init(void);
> +
> +#endif /* __OMAP_MCSPI_H */
> diff --git a/arch/arm/mach-omap/include/mach/omap3-devices.h b/arch/arm/mach-omap/include/mach/omap3-devices.h
> new file mode 100644
> index 0000000..2db8583
> --- /dev/null
> +++ b/arch/arm/mach-omap/include/mach/omap3-devices.h
> @@ -0,0 +1,34 @@
> +#include <driver.h>
> +#include <sizes.h>
> +
> +#include <mach/mcspi.h>
> +
> +/* the device numbering is the same as in the device tree */
> +
this avoid duplicaation
static inline struct device_d *omap3_add_spi(int id, resource_t start)
{
return add_generic_device("omap3_spi", id, NULL, start, SZ_4K,
IORESOURCE_MEM, NULL);
}
static inline struct device_d *omap3_add_spi1(void)
{
return omap3_add_spi(1, OMAP3_MCSPI1_BASE);
}
static inline struct device_d *omap3_add_spi2(void)
{
return omap3_add_spi(2, OMAP3_MCSPI2_BASE);
}
...
really DROP this struct way to describe the register it's too much dangerous
to modiffy and maintian
Best Regards,
J.
> +static inline struct device_d *omap3_add_spi1(void)
> +{
> + return add_generic_device("omap3_spi", 1, NULL,
> + OMAP3_MCSPI1_BASE, SZ_4K,
> + IORESOURCE_MEM, NULL);
> +}
> +
> +static inline struct device_d *omap3_add_spi2(void)
> +{
> + return add_generic_device("omap3_spi", 2, NULL,
> + OMAP3_MCSPI2_BASE, SZ_4K,
> + IORESOURCE_MEM, NULL);
> +}
> +
> +static inline struct device_d *omap3_add_spi3(void)
> +{
> + return add_generic_device("omap3_spi", 3, NULL,
> + OMAP3_MCSPI3_BASE, SZ_4K,
> + IORESOURCE_MEM, NULL);
> +}
> +
> +static inline struct device_d *omap3_add_spi4(void)
> +{
> + return add_generic_device("omap3_spi", 4, NULL,
> + OMAP3_MCSPI4_BASE, SZ_4K,
> + IORESOURCE_MEM, NULL);
> +}
> diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
> index a249b81..ba1b948 100644
> --- a/drivers/spi/Kconfig
> +++ b/drivers/spi/Kconfig
> @@ -34,4 +34,10 @@ config DRIVER_SPI_ATMEL
> depends on ARCH_AT91
> depends on SPI
>
> +
> +config DRIVER_SPI_OMAP3
> + bool "OMAP3 McSPI Master driver"
> + depends on ARCH_OMAP3
> + depends on SPI
> +
> endmenu
> diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
> index 101652f..b53061e 100644
> --- a/drivers/spi/Makefile
> +++ b/drivers/spi/Makefile
> @@ -2,3 +2,4 @@ obj-$(CONFIG_SPI) += spi.o
> obj-$(CONFIG_DRIVER_SPI_IMX) += imx_spi.o
> obj-$(CONFIG_DRIVER_SPI_ALTERA) += altera_spi.o
> obj-$(CONFIG_DRIVER_SPI_ATMEL) += atmel_spi.o
> +obj-$(CONFIG_DRIVER_SPI_OMAP3) += omap3_spi.o
> diff --git a/drivers/spi/omap3_spi.c b/drivers/spi/omap3_spi.c
> new file mode 100644
> index 0000000..eadb78d
> --- /dev/null
> +++ b/drivers/spi/omap3_spi.c
> @@ -0,0 +1,403 @@
> +/*
> + * Copyright (C) 2012 Jan Luebbe <j.luebbe@pengutronix.de>
> + *
> + * Copyright (C) 2010 Dirk Behme <dirk.behme@googlemail.com>
> + *
> + * Driver for McSPI controller on OMAP3. Based on davinci_spi.c
> + * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
> + *
> + * Copyright (C) 2007 Atmel Corporation
> + *
> + * Parts taken from linux/drivers/spi/omap2_mcspi.c
> + * Copyright (C) 2005, 2006 Nokia Corporation
> + *
> + * Modified by Ruslan Araslanov <ruslan.araslanov@vitecmm.com>
> + *
> + * 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 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 <common.h>
> +#include <init.h>
> +#include <driver.h>
> +#include <errno.h>
> +#include <spi/spi.h>
> +#include <malloc.h>
> +#include <io.h>
> +#include "omap3_spi.h"
> +
> +#define WORD_LEN 8
> +#define SPI_WAIT_TIMEOUT 30000000
> +
> +#define SPI_XFER_BEGIN 0x01 /* Assert CS before transfer */
> +#define SPI_XFER_END 0x02 /* Deassert CS after transfer */
> +
> +static void spi_reset(struct spi_master *master)
> +{
> + struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
> + struct mcspi __iomem *regs = omap3_master->regs;
> + unsigned int tmp;
> +
> + writel(OMAP3_MCSPI_SYSCONFIG_SOFTRESET, ®s->sysconfig);
> + do {
> + tmp = readl(®s->sysstatus);
> + } while (!(tmp & OMAP3_MCSPI_SYSSTATUS_RESETDONE));
> +
> + writel(OMAP3_MCSPI_SYSCONFIG_AUTOIDLE |
> + OMAP3_MCSPI_SYSCONFIG_ENAWAKEUP |
> + OMAP3_MCSPI_SYSCONFIG_SMARTIDLE,
> + ®s->sysconfig);
> +
> + writel(OMAP3_MCSPI_WAKEUPENABLE_WKEN, ®s->wakeupenable);
> +}
> +
> +int spi_claim_bus(struct spi_device *spi)
> +{
> + struct spi_master *master = spi->master;
> + struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
> + struct mcspi __iomem *regs = omap3_master->regs;
> + unsigned int conf, div = 0;
> +
> + /* McSPI global module configuration */
> +
> + /*
> + * setup when switching from (reset default) slave mode
> + * to single-channel master mode
> + */
> + conf = readl(®s->modulctrl);
> + conf &= ~(OMAP3_MCSPI_MODULCTRL_STEST | OMAP3_MCSPI_MODULCTRL_MS);
> + conf |= OMAP3_MCSPI_MODULCTRL_SINGLE;
> + writel(conf, ®s->modulctrl);
> +
> + /* McSPI individual channel configuration */
> +
> + /* Calculate clock divisor. Valid range: 0x0 - 0xC ( /1 - /4096 ) */
> + if (spi->max_speed_hz) {
> + while (div <= 0xC && (OMAP3_MCSPI_MAX_FREQ / (1 << div))
> + > spi->max_speed_hz)
> + div++;
> + } else
> + div = 0xC;
> +
> + conf = readl(®s->channel[spi->chip_select].chconf);
> +
> + /* standard 4-wire master mode: SCK, MOSI/out, MISO/in, nCS
> + * REVISIT: this controller could support SPI_3WIRE mode.
> + */
> + conf &= ~(OMAP3_MCSPI_CHCONF_IS|OMAP3_MCSPI_CHCONF_DPE1);
> + conf |= OMAP3_MCSPI_CHCONF_DPE0;
> +
> + /* wordlength */
> + conf &= ~OMAP3_MCSPI_CHCONF_WL_MASK;
> + conf |= (WORD_LEN - 1) << 7;
> +
> + /* set chipselect polarity; manage with FORCE */
> + if (!(spi->mode & SPI_CS_HIGH))
> + conf |= OMAP3_MCSPI_CHCONF_EPOL; /* active-low; normal */
> + else
> + conf &= ~OMAP3_MCSPI_CHCONF_EPOL;
> +
> + /* set clock divisor */
> + conf &= ~OMAP3_MCSPI_CHCONF_CLKD_MASK;
> + conf |= div << 2;
> +
> + /* set SPI mode 0..3 */
> + if (spi->mode & SPI_CPOL)
> + conf |= OMAP3_MCSPI_CHCONF_POL;
> + else
> + conf &= ~OMAP3_MCSPI_CHCONF_POL;
> + if (spi->mode & SPI_CPHA)
> + conf |= OMAP3_MCSPI_CHCONF_PHA;
> + else
> + conf &= ~OMAP3_MCSPI_CHCONF_PHA;
> +
> + /* Transmit & receive mode */
> + conf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
> +
> + writel(conf, ®s->channel[spi->chip_select].chconf);
> + readl(®s->channel[spi->chip_select].chconf);
> +
> + return 0;
> +}
> +
> +int omap3_spi_write(struct spi_device *spi, unsigned int len, const u8 *txp,
> + unsigned long flags)
> +{
> + struct spi_master *master = spi->master;
> + struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
> + struct mcspi __iomem *regs = omap3_master->regs;
> + int i;
> + int timeout = SPI_WAIT_TIMEOUT;
> + int chconf = readl(®s->channel[spi->chip_select].chconf);
> +
> + if (flags & SPI_XFER_BEGIN)
> + writel(OMAP3_MCSPI_CHCTRL_EN,
> + ®s->channel[spi->chip_select].chctrl);
> +
> + chconf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
> + chconf |= OMAP3_MCSPI_CHCONF_TRM_TX_ONLY;
> + chconf |= OMAP3_MCSPI_CHCONF_FORCE;
> + writel(chconf, ®s->channel[spi->chip_select].chconf);
> + readl(®s->channel[spi->chip_select].chconf);
> +
> + for (i = 0; i < len; i++) {
> + /* wait till TX register is empty (TXS == 1) */
> + while (!(readl(®s->channel[spi->chip_select].chstat) &
> + OMAP3_MCSPI_CHSTAT_TXS)) {
> + if (--timeout <= 0) {
> + printf("SPI TXS timed out, status=0x%08x\n",
> + readl(®s->channel[spi->chip_select].chstat));
> + return -1;
> + }
> + }
> + /* Write the data */
> + writel(txp[i], ®s->channel[spi->chip_select].tx);
> + }
> +
> + if (flags & SPI_XFER_END) {
> + /* wait to finish of transfer */
> + while (!(readl(®s->channel[spi->chip_select].chstat) &
> + OMAP3_MCSPI_CHSTAT_EOT));
> +
> + chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
> + writel(chconf, ®s->channel[spi->chip_select].chconf);
> +
> + writel(0, ®s->channel[spi->chip_select].chctrl);
> + }
> +
> + while (!(readl(®s->channel[spi->chip_select].chstat) &
> + OMAP3_MCSPI_CHSTAT_TXS));
> + while (!(readl(®s->channel[spi->chip_select].chstat) &
> + OMAP3_MCSPI_CHSTAT_EOT));
> +
> + return 0;
> +}
> +
> +int omap3_spi_read(struct spi_device *spi, unsigned int len, u8 *rxp,
> + unsigned long flags)
> +{
> + struct spi_master *master = spi->master;
> + struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
> + struct mcspi __iomem *regs = omap3_master->regs;
> + int i;
> + int timeout = SPI_WAIT_TIMEOUT;
> + int chconf = readl(®s->channel[spi->chip_select].chconf);
> +
> + if (flags & SPI_XFER_BEGIN)
> + writel(OMAP3_MCSPI_CHCTRL_EN,
> + ®s->channel[spi->chip_select].chctrl);
> +
> + chconf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
> + chconf |= OMAP3_MCSPI_CHCONF_TRM_RX_ONLY;
> + chconf |= OMAP3_MCSPI_CHCONF_FORCE;
> + writel(chconf, ®s->channel[spi->chip_select].chconf);
> + readl(®s->channel[spi->chip_select].chconf);
> + writel(0, ®s->channel[spi->chip_select].tx);
> +
> + for (i = 0; i < len; i++) {
> + /* Wait till RX register contains data (RXS == 1) */
> + while (!(readl(®s->channel[spi->chip_select].chstat) &
> + OMAP3_MCSPI_CHSTAT_RXS)) {
> + if (--timeout <= 0) {
> + printf("SPI RXS timed out, status=0x%08x\n",
> + readl(®s->channel[spi->chip_select].chstat));
> + return -1;
> + }
> + }
> + /* Read the data */
> + rxp[i] = readl(®s->channel[spi->chip_select].rx);
> + }
> +
> + if (flags & SPI_XFER_END) {
> + chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
> + writel(chconf, ®s->channel[spi->chip_select].chconf);
> + readl(®s->channel[spi->chip_select].chconf);
> +
> + writel(0, ®s->channel[spi->chip_select].chctrl);
> + }
> +
> + return 0;
> +}
> +
> +int spi_xfer(struct spi_device *spi, struct spi_transfer *t, unsigned long flags)
> +{
> + struct spi_master *master = spi->master;
> + struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
> + struct mcspi __iomem *regs = omap3_master->regs;
> + unsigned int len = t->len;
> + int ret = -1;
> + const u8 *txp = t->tx_buf; /* can be NULL for read operation */
> + u8 *rxp = t->rx_buf; /* can be NULL for write operation */
> +
> + if (len == 0) { /* only change CS */
> + int chconf = readl(®s->channel[spi->chip_select].chconf);
> +
> + if (flags & SPI_XFER_BEGIN) {
> + writel(OMAP3_MCSPI_CHCTRL_EN,
> + ®s->channel[spi->chip_select].chctrl);
> + chconf |= OMAP3_MCSPI_CHCONF_FORCE;
> + writel(chconf,
> + ®s->channel[spi->chip_select].chconf);
> + readl(®s->channel[spi->chip_select].chconf);
> + }
> +
> + if (flags & SPI_XFER_END) {
> + chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
> + writel(chconf,
> + ®s->channel[spi->chip_select].chconf);
> + writel(0, ®s->channel[spi->chip_select].chctrl);
> + readl(®s->channel[spi->chip_select].chconf);
> + }
> +
> + ret = 0;
> + } else {
> + if (t->tx_buf != NULL)
> + ret = omap3_spi_write(spi, len, txp, flags);
> +
> + if (t->rx_buf != NULL)
> + ret = omap3_spi_read(spi, len, rxp, flags);
> + }
> + return ret;
> +}
> +
> +static int omap3_spi_transfer(struct spi_device *spi, struct spi_message *mesg)
> +{
> + struct spi_master *master = spi->master;
> + struct spi_transfer *t, *t_first, *t_last = NULL;
> + unsigned long flags;
> + int ret = 0;
> +
> + ret = spi_claim_bus(spi);
> + if (ret)
> + return ret;
> +
> + if (list_empty(&mesg->transfers))
> + return 0;
> +
> + t_first = list_first_entry(&mesg->transfers, struct spi_transfer, transfer_list);
> + t_last = list_last_entry(&mesg->transfers, struct spi_transfer, transfer_list);
> +
> + mesg->actual_length = 0;
> +
> + dev_dbg(master->dev, "transfer start actual_length=%i\n", mesg->actual_length);
> + list_for_each_entry(t, &mesg->transfers, transfer_list) {
> + dev_dbg(master->dev,
> + " xfer %p: len %u tx %p rx %p\n",
> + t, t->len, t->tx_buf, t->rx_buf);
> + flags = 0;
> + if (t == t_first)
> + flags |= SPI_XFER_BEGIN;
> + if (t == t_last)
> + flags |= SPI_XFER_END;
> + spi_xfer(spi, t, flags);
> + mesg->actual_length += t->len;
> + }
> + dev_dbg(master->dev, "transfer done actual_length=%i\n", mesg->actual_length);
> +
> + return ret;
> +}
> +
> +static int omap3_spi_setup(struct spi_device *spi)
> +{
> + struct spi_master *master = spi->master;
> +
> + if (((master->bus_num == 0) && (spi->chip_select > 3)) ||
> + ((master->bus_num == 1) && (spi->chip_select > 1)) ||
> + ((master->bus_num == 2) && (spi->chip_select > 1)) ||
> + ((master->bus_num == 3) && (spi->chip_select > 0))) {
> + printf("SPI error: unsupported chip select %i \
> + on bus %i\n", spi->chip_select, master->bus_num);
> + return -1;
> + }
> +
> + if (spi->max_speed_hz > OMAP3_MCSPI_MAX_FREQ) {
> + printf("SPI error: unsupported frequency %i Hz. \
> + Max frequency is 48 Mhz\n", spi->max_speed_hz);
> + return -1;
> + }
> +
> + if (spi->mode > SPI_MODE_3) {
> + printf("SPI error: unsupported SPI mode %i\n", spi->mode);
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +static int omap3_spi_probe(struct device_d *dev)
> +{
> + struct spi_master *master;
> + struct omap3_spi_master *omap3_master;
> +
> + omap3_master = xzalloc(sizeof(*omap3_master));
> +
> + master = &omap3_master->master;
> + master->dev = dev;
> +
> + /*
> + * OMAP3 McSPI (MultiChannel SPI) has 4 busses (modules)
> + * with different number of chip selects (CS, channels):
> + * McSPI1 has 4 CS (bus 0, cs 0 - 3)
> + * McSPI2 has 2 CS (bus 1, cs 0 - 1)
> + * McSPI3 has 2 CS (bus 2, cs 0 - 1)
> + * McSPI4 has 1 CS (bus 3, cs 0)
> + */
> +
> + master->bus_num = dev->id;
> + switch (master->bus_num) {
> + case 1:
> + master->num_chipselect = 4;
> + break;
> + case 2:
> + master->num_chipselect = 2;
> + break;
> + case 3:
> + master->num_chipselect = 2;
> + break;
> + case 4:
> + master->num_chipselect = 1;
> + break;
> + default:
> + printf("SPI error: unsupported bus %i. \
> + Supported busses 1 - 4\n", master->bus_num);
> + return -ENODEV;
> + }
> + master->setup = omap3_spi_setup;
> + master->transfer = omap3_spi_transfer;
> +
> + omap3_master->regs = (struct mcspi *)dev_request_mem_region(dev, 0);;
> +
> + spi_reset(master);
> +
> + spi_register_master(master);
> +
> + return 0;
> +}
> +
> +static struct driver_d omap3_spi_driver = {
> + .name = "omap3_spi",
> + .probe = omap3_spi_probe,
> +};
> +
> +static int omap3_spi_init(void)
> +{
> + return register_driver(&omap3_spi_driver);
> +}
> +
> +device_initcall(omap3_spi_init);
> diff --git a/drivers/spi/omap3_spi.h b/drivers/spi/omap3_spi.h
> new file mode 100644
> index 0000000..2ad8ef7
> --- /dev/null
> +++ b/drivers/spi/omap3_spi.h
> @@ -0,0 +1,100 @@
> +/*
> + * Register definitions for the OMAP3 McSPI Controller
> + *
> + * Copyright (C) 2010 Dirk Behme <dirk.behme@googlemail.com>
> + *
> + * Parts taken from linux/drivers/spi/omap2_mcspi.c
> + * Copyright (C) 2005, 2006 Nokia Corporation
> + *
> + * Modified by Ruslan Araslanov <ruslan.araslanov@vitecmm.com>
> + *
> + * 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 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
> + */
> +
> +#ifndef _OMAP3_SPI_H_
> +#define _OMAP3_SPI_H_
> +
> +#define OMAP3_MCSPI_MAX_FREQ 48000000
> +
> +/* OMAP3 McSPI registers */
> +struct mcspi_channel {
> + unsigned int chconf; /* 0x2C, 0x40, 0x54, 0x68 */
> + unsigned int chstat; /* 0x30, 0x44, 0x58, 0x6C */
> + unsigned int chctrl; /* 0x34, 0x48, 0x5C, 0x70 */
> + unsigned int tx; /* 0x38, 0x4C, 0x60, 0x74 */
> + unsigned int rx; /* 0x3C, 0x50, 0x64, 0x78 */
> +};
> +
> +struct mcspi {
> + unsigned char res1[0x10];
> + unsigned int sysconfig; /* 0x10 */
> + unsigned int sysstatus; /* 0x14 */
> + unsigned int irqstatus; /* 0x18 */
> + unsigned int irqenable; /* 0x1C */
> + unsigned int wakeupenable; /* 0x20 */
> + unsigned int syst; /* 0x24 */
> + unsigned int modulctrl; /* 0x28 */
> + struct mcspi_channel channel[4]; /* channel0: 0x2C - 0x3C, bus 0 & 1 & 2 & 3 */
> + /* channel1: 0x40 - 0x50, bus 0 & 1 */
> + /* channel2: 0x54 - 0x64, bus 0 & 1 */
> + /* channel3: 0x68 - 0x78, bus 0 */
> +};
> +
> +/* per-register bitmasks */
> +#define OMAP3_MCSPI_SYSCONFIG_SMARTIDLE (2 << 3)
> +#define OMAP3_MCSPI_SYSCONFIG_ENAWAKEUP (1 << 2)
> +#define OMAP3_MCSPI_SYSCONFIG_AUTOIDLE (1 << 0)
> +#define OMAP3_MCSPI_SYSCONFIG_SOFTRESET (1 << 1)
> +
> +#define OMAP3_MCSPI_SYSSTATUS_RESETDONE (1 << 0)
> +
> +#define OMAP3_MCSPI_MODULCTRL_SINGLE (1 << 0)
> +#define OMAP3_MCSPI_MODULCTRL_MS (1 << 2)
> +#define OMAP3_MCSPI_MODULCTRL_STEST (1 << 3)
> +
> +#define OMAP3_MCSPI_CHCONF_PHA (1 << 0)
> +#define OMAP3_MCSPI_CHCONF_POL (1 << 1)
> +#define OMAP3_MCSPI_CHCONF_CLKD_MASK (0x0f << 2)
> +#define OMAP3_MCSPI_CHCONF_EPOL (1 << 6)
> +#define OMAP3_MCSPI_CHCONF_WL_MASK (0x1f << 7)
> +#define OMAP3_MCSPI_CHCONF_TRM_RX_ONLY (0x01 << 12)
> +#define OMAP3_MCSPI_CHCONF_TRM_TX_ONLY (0x02 << 12)
> +#define OMAP3_MCSPI_CHCONF_TRM_MASK (0x03 << 12)
> +#define OMAP3_MCSPI_CHCONF_DMAW (1 << 14)
> +#define OMAP3_MCSPI_CHCONF_DMAR (1 << 15)
> +#define OMAP3_MCSPI_CHCONF_DPE0 (1 << 16)
> +#define OMAP3_MCSPI_CHCONF_DPE1 (1 << 17)
> +#define OMAP3_MCSPI_CHCONF_IS (1 << 18)
> +#define OMAP3_MCSPI_CHCONF_TURBO (1 << 19)
> +#define OMAP3_MCSPI_CHCONF_FORCE (1 << 20)
> +
> +#define OMAP3_MCSPI_CHSTAT_RXS (1 << 0)
> +#define OMAP3_MCSPI_CHSTAT_TXS (1 << 1)
> +#define OMAP3_MCSPI_CHSTAT_EOT (1 << 2)
> +
> +#define OMAP3_MCSPI_CHCTRL_EN (1 << 0)
> +
> +#define OMAP3_MCSPI_WAKEUPENABLE_WKEN (1 << 0)
> +
> +struct omap3_spi_master {
> + struct spi_master master;
> + struct mcspi __iomem *regs;
> +};
> +
> +#endif /* _OMAP3_SPI_H_ */
> --
> 1.7.10.4
>
>
> _______________________________________________
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^ permalink raw reply [flat|nested] 24+ messages in thread* Re: [PATCH 10/10] drivers/spi: add driver for the Multichannel SPI controller found in TI SoCs
2012-09-03 11:46 ` [PATCH 10/10] drivers/spi: add driver for the Multichannel SPI controller found in TI SoCs Jan Luebbe
2012-09-03 16:32 ` Jean-Christophe PLAGNIOL-VILLARD
@ 2012-09-04 8:58 ` Sascha Hauer
2012-09-05 9:20 ` Jan Lübbe
1 sibling, 1 reply; 24+ messages in thread
From: Sascha Hauer @ 2012-09-04 8:58 UTC (permalink / raw)
To: Jan Luebbe; +Cc: barebox
On Mon, Sep 03, 2012 at 01:46:05PM +0200, Jan Luebbe wrote:
> Also create devices for OMAP3.
>
> Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
> ---
> +
> +#define WORD_LEN 8
> +#define SPI_WAIT_TIMEOUT 30000000
> +
> +#define SPI_XFER_BEGIN 0x01 /* Assert CS before transfer */
> +#define SPI_XFER_END 0x02 /* Deassert CS after transfer */
> +
> +static void spi_reset(struct spi_master *master)
> +{
> + struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
> + struct mcspi __iomem *regs = omap3_master->regs;
> + unsigned int tmp;
> +
> + writel(OMAP3_MCSPI_SYSCONFIG_SOFTRESET, ®s->sysconfig);
> + do {
> + tmp = readl(®s->sysstatus);
> + } while (!(tmp & OMAP3_MCSPI_SYSSTATUS_RESETDONE));
> +
> + writel(OMAP3_MCSPI_SYSCONFIG_AUTOIDLE |
> + OMAP3_MCSPI_SYSCONFIG_ENAWAKEUP |
> + OMAP3_MCSPI_SYSCONFIG_SMARTIDLE,
> + ®s->sysconfig);
> +
> + writel(OMAP3_MCSPI_WAKEUPENABLE_WKEN, ®s->wakeupenable);
> +}
> +
> +int spi_claim_bus(struct spi_device *spi)
> +{
> + struct spi_master *master = spi->master;
> + struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
> + struct mcspi __iomem *regs = omap3_master->regs;
> + unsigned int conf, div = 0;
> +
> + /* McSPI global module configuration */
> +
> + /*
> + * setup when switching from (reset default) slave mode
> + * to single-channel master mode
> + */
> + conf = readl(®s->modulctrl);
> + conf &= ~(OMAP3_MCSPI_MODULCTRL_STEST | OMAP3_MCSPI_MODULCTRL_MS);
> + conf |= OMAP3_MCSPI_MODULCTRL_SINGLE;
> + writel(conf, ®s->modulctrl);
> +
> + /* McSPI individual channel configuration */
> +
> + /* Calculate clock divisor. Valid range: 0x0 - 0xC ( /1 - /4096 ) */
> + if (spi->max_speed_hz) {
> + while (div <= 0xC && (OMAP3_MCSPI_MAX_FREQ / (1 << div))
> + > spi->max_speed_hz)
> + div++;
> + } else
> + div = 0xC;
if an 'if' has braces then add them to the 'else' path aswell.
> +
> + conf = readl(®s->channel[spi->chip_select].chconf);
> +
> + /* standard 4-wire master mode: SCK, MOSI/out, MISO/in, nCS
> + * REVISIT: this controller could support SPI_3WIRE mode.
> + */
> + conf &= ~(OMAP3_MCSPI_CHCONF_IS|OMAP3_MCSPI_CHCONF_DPE1);
> + conf |= OMAP3_MCSPI_CHCONF_DPE0;
> +
> + /* wordlength */
> + conf &= ~OMAP3_MCSPI_CHCONF_WL_MASK;
> + conf |= (WORD_LEN - 1) << 7;
> +
> + /* set chipselect polarity; manage with FORCE */
> + if (!(spi->mode & SPI_CS_HIGH))
> + conf |= OMAP3_MCSPI_CHCONF_EPOL; /* active-low; normal */
> + else
> + conf &= ~OMAP3_MCSPI_CHCONF_EPOL;
> +
> + /* set clock divisor */
> + conf &= ~OMAP3_MCSPI_CHCONF_CLKD_MASK;
> + conf |= div << 2;
> +
> + /* set SPI mode 0..3 */
> + if (spi->mode & SPI_CPOL)
> + conf |= OMAP3_MCSPI_CHCONF_POL;
> + else
> + conf &= ~OMAP3_MCSPI_CHCONF_POL;
> + if (spi->mode & SPI_CPHA)
> + conf |= OMAP3_MCSPI_CHCONF_PHA;
> + else
> + conf &= ~OMAP3_MCSPI_CHCONF_PHA;
> +
> + /* Transmit & receive mode */
> + conf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
> +
> + writel(conf, ®s->channel[spi->chip_select].chconf);
> + readl(®s->channel[spi->chip_select].chconf);
> +
> + return 0;
> +}
> +
> +int omap3_spi_write(struct spi_device *spi, unsigned int len, const u8 *txp,
> + unsigned long flags)
> +{
> + struct spi_master *master = spi->master;
> + struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
> + struct mcspi __iomem *regs = omap3_master->regs;
> + int i;
> + int timeout = SPI_WAIT_TIMEOUT;
> + int chconf = readl(®s->channel[spi->chip_select].chconf);
> +
> + if (flags & SPI_XFER_BEGIN)
> + writel(OMAP3_MCSPI_CHCTRL_EN,
> + ®s->channel[spi->chip_select].chctrl);
> +
> + chconf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
> + chconf |= OMAP3_MCSPI_CHCONF_TRM_TX_ONLY;
> + chconf |= OMAP3_MCSPI_CHCONF_FORCE;
> + writel(chconf, ®s->channel[spi->chip_select].chconf);
> + readl(®s->channel[spi->chip_select].chconf);
> +
> + for (i = 0; i < len; i++) {
> + /* wait till TX register is empty (TXS == 1) */
> + while (!(readl(®s->channel[spi->chip_select].chstat) &
> + OMAP3_MCSPI_CHSTAT_TXS)) {
> + if (--timeout <= 0) {
> + printf("SPI TXS timed out, status=0x%08x\n",
> + readl(®s->channel[spi->chip_select].chstat));
> + return -1;
> + }
> + }
Please use a well defined timeout rather than 'poll a million times'
> + /* Write the data */
> + writel(txp[i], ®s->channel[spi->chip_select].tx);
> + }
> +
> + if (flags & SPI_XFER_END) {
> + /* wait to finish of transfer */
> + while (!(readl(®s->channel[spi->chip_select].chstat) &
> + OMAP3_MCSPI_CHSTAT_EOT));
> +
> + chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
> + writel(chconf, ®s->channel[spi->chip_select].chconf);
> +
> + writel(0, ®s->channel[spi->chip_select].chctrl);
> + }
> +
> + while (!(readl(®s->channel[spi->chip_select].chstat) &
> + OMAP3_MCSPI_CHSTAT_TXS));
> + while (!(readl(®s->channel[spi->chip_select].chstat) &
> + OMAP3_MCSPI_CHSTAT_EOT));
> +
> + return 0;
> +}
> +
> +int omap3_spi_read(struct spi_device *spi, unsigned int len, u8 *rxp,
> + unsigned long flags)
> +{
> + struct spi_master *master = spi->master;
> + struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
> + struct mcspi __iomem *regs = omap3_master->regs;
> + int i;
> + int timeout = SPI_WAIT_TIMEOUT;
> + int chconf = readl(®s->channel[spi->chip_select].chconf);
> +
> + if (flags & SPI_XFER_BEGIN)
> + writel(OMAP3_MCSPI_CHCTRL_EN,
> + ®s->channel[spi->chip_select].chctrl);
> +
> + chconf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
> + chconf |= OMAP3_MCSPI_CHCONF_TRM_RX_ONLY;
> + chconf |= OMAP3_MCSPI_CHCONF_FORCE;
> + writel(chconf, ®s->channel[spi->chip_select].chconf);
> + readl(®s->channel[spi->chip_select].chconf);
> + writel(0, ®s->channel[spi->chip_select].tx);
> +
> + for (i = 0; i < len; i++) {
> + /* Wait till RX register contains data (RXS == 1) */
> + while (!(readl(®s->channel[spi->chip_select].chstat) &
> + OMAP3_MCSPI_CHSTAT_RXS)) {
> + if (--timeout <= 0) {
> + printf("SPI RXS timed out, status=0x%08x\n",
> + readl(®s->channel[spi->chip_select].chstat));
> + return -1;
> + }
> + }
ditto
> + /* Read the data */
> + rxp[i] = readl(®s->channel[spi->chip_select].rx);
> + }
> +
> + if (flags & SPI_XFER_END) {
> + chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
> + writel(chconf, ®s->channel[spi->chip_select].chconf);
> + readl(®s->channel[spi->chip_select].chconf);
> +
> + writel(0, ®s->channel[spi->chip_select].chctrl);
> + }
> +
> + return 0;
> +}
> +
> +int spi_xfer(struct spi_device *spi, struct spi_transfer *t, unsigned long flags)
> +{
> + struct spi_master *master = spi->master;
> + struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master);
> + struct mcspi __iomem *regs = omap3_master->regs;
> + unsigned int len = t->len;
> + int ret = -1;
-1 is no valid error code. Please remove the initialization on ret.
> + const u8 *txp = t->tx_buf; /* can be NULL for read operation */
> + u8 *rxp = t->rx_buf; /* can be NULL for write operation */
> +
> + if (len == 0) { /* only change CS */
> + int chconf = readl(®s->channel[spi->chip_select].chconf);
> +
> + if (flags & SPI_XFER_BEGIN) {
> + writel(OMAP3_MCSPI_CHCTRL_EN,
> + ®s->channel[spi->chip_select].chctrl);
> + chconf |= OMAP3_MCSPI_CHCONF_FORCE;
> + writel(chconf,
> + ®s->channel[spi->chip_select].chconf);
> + readl(®s->channel[spi->chip_select].chconf);
> + }
> +
> + if (flags & SPI_XFER_END) {
> + chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
> + writel(chconf,
> + ®s->channel[spi->chip_select].chconf);
> + writel(0, ®s->channel[spi->chip_select].chctrl);
> + readl(®s->channel[spi->chip_select].chconf);
> + }
> +
> + ret = 0;
> + } else {
> + if (t->tx_buf != NULL)
> + ret = omap3_spi_write(spi, len, txp, flags);
> +
> + if (t->rx_buf != NULL)
> + ret = omap3_spi_read(spi, len, rxp, flags);
> + }
> + return ret;
> +}
> +
> +static int omap3_spi_transfer(struct spi_device *spi, struct spi_message *mesg)
> +{
> + struct spi_master *master = spi->master;
> + struct spi_transfer *t, *t_first, *t_last = NULL;
> + unsigned long flags;
> + int ret = 0;
> +
> + ret = spi_claim_bus(spi);
> + if (ret)
> + return ret;
> +
> + if (list_empty(&mesg->transfers))
> + return 0;
> +
> + t_first = list_first_entry(&mesg->transfers, struct spi_transfer, transfer_list);
> + t_last = list_last_entry(&mesg->transfers, struct spi_transfer, transfer_list);
> +
> + mesg->actual_length = 0;
> +
> + dev_dbg(master->dev, "transfer start actual_length=%i\n", mesg->actual_length);
> + list_for_each_entry(t, &mesg->transfers, transfer_list) {
> + dev_dbg(master->dev,
> + " xfer %p: len %u tx %p rx %p\n",
> + t, t->len, t->tx_buf, t->rx_buf);
> + flags = 0;
> + if (t == t_first)
> + flags |= SPI_XFER_BEGIN;
> + if (t == t_last)
> + flags |= SPI_XFER_END;
> + spi_xfer(spi, t, flags);
> + mesg->actual_length += t->len;
> + }
> + dev_dbg(master->dev, "transfer done actual_length=%i\n", mesg->actual_length);
> +
> + return ret;
> +}
> +
> +static int omap3_spi_setup(struct spi_device *spi)
> +{
> + struct spi_master *master = spi->master;
> +
> + if (((master->bus_num == 0) && (spi->chip_select > 3)) ||
> + ((master->bus_num == 1) && (spi->chip_select > 1)) ||
> + ((master->bus_num == 2) && (spi->chip_select > 1)) ||
> + ((master->bus_num == 3) && (spi->chip_select > 0))) {
> + printf("SPI error: unsupported chip select %i \
> + on bus %i\n", spi->chip_select, master->bus_num);
> + return -1;
> + }
> +
> + if (spi->max_speed_hz > OMAP3_MCSPI_MAX_FREQ) {
> + printf("SPI error: unsupported frequency %i Hz. \
> + Max frequency is 48 Mhz\n", spi->max_speed_hz);
> + return -1;
> + }
> +
> + if (spi->mode > SPI_MODE_3) {
> + printf("SPI error: unsupported SPI mode %i\n", spi->mode);
> + return -1;
> + }
Please use valid error codes here.
> +
> + return 0;
> +}
> +
> +static int omap3_spi_probe(struct device_d *dev)
> +{
> + struct spi_master *master;
> + struct omap3_spi_master *omap3_master;
> +
> + omap3_master = xzalloc(sizeof(*omap3_master));
> +
> + master = &omap3_master->master;
> + master->dev = dev;
> +
> + /*
> + * OMAP3 McSPI (MultiChannel SPI) has 4 busses (modules)
> + * with different number of chip selects (CS, channels):
> + * McSPI1 has 4 CS (bus 0, cs 0 - 3)
> + * McSPI2 has 2 CS (bus 1, cs 0 - 1)
> + * McSPI3 has 2 CS (bus 2, cs 0 - 1)
> + * McSPI4 has 1 CS (bus 3, cs 0)
> + */
> +
> + master->bus_num = dev->id;
> + switch (master->bus_num) {
> + case 1:
> + master->num_chipselect = 4;
> + break;
> + case 2:
> + master->num_chipselect = 2;
> + break;
> + case 3:
> + master->num_chipselect = 2;
> + break;
> + case 4:
> + master->num_chipselect = 1;
> + break;
> + default:
> + printf("SPI error: unsupported bus %i. \
> + Supported busses 1 - 4\n", master->bus_num);
> + return -ENODEV;
> + }
This does not scale for different SoCs. Can't you just initialize
num_chipselect to the maximum value of 4?
Sascha
--
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] 24+ messages in thread* Re: [PATCH 10/10] drivers/spi: add driver for the Multichannel SPI controller found in TI SoCs
2012-09-04 8:58 ` Sascha Hauer
@ 2012-09-05 9:20 ` Jan Lübbe
0 siblings, 0 replies; 24+ messages in thread
From: Jan Lübbe @ 2012-09-05 9:20 UTC (permalink / raw)
To: Sascha Hauer; +Cc: barebox-request
Hi,
On Tue, 2012-09-04 at 10:58 +0200, Sascha Hauer wrote:
> > + for (i = 0; i < len; i++) {
> > + /* wait till TX register is empty (TXS == 1) */
> > + while
> (!(readl(®s->channel[spi->chip_select].chstat) &
> > + OMAP3_MCSPI_CHSTAT_TXS)) {
> > + if (--timeout <= 0) {
> > + printf("SPI TXS timed out, status=0x%
> 08x\n",
> > +
> readl(®s->channel[spi->chip_select].chstat));
> > + return -1;
> > + }
> > + }
>
> Please use a well defined timeout rather than 'poll a million times'
I tried using is_timeout like this:
timer_start = get_time_ns();
while (!(readl(®s->channel[spi->chip_select].chstat) &
OMAP3_MCSPI_CHSTAT_TXS)) {
if (is_timeout(timer_start, SPI_WAIT_TIMEOUT)) {
printf("SPI TXS timed out, status=0x%08x\n",
readl(®s->channel[spi->chip_select].chstat));
return -1;
}
}
With SPI_WAIT_TIMEOUT = MSECOND this results in ~23% more time needed
for reading/writing:
With a simple counter:
barebox@KSP-0500:/ time cp /dev/m25p0.norkernel /dev/null
time: 12639ms
barebox@KSP-0500:/ time cp /dev/m25p0.norkernel /dev/null
time: 12639ms
barebox@KSP-0500:/ time cp /dev/m25p0.norkernel /dev/null
time: 12659ms
With is_timeout():
barebox@KSP-0500:/ time cp /dev/m25p0.norkernel /dev/null
time: 15561ms
barebox@KSP-0500:/ time cp /dev/m25p0.norkernel /dev/null
time: 15564ms
barebox@KSP-0500:/ time cp /dev/m25p0.norkernel /dev/null
time: 15568ms
Is this really acceptable? Is there a way to avoid the overhead of
calling several functions for each loop?
Regards,
Jan
--
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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] 24+ messages in thread