G'day


>> sid1-noah:/ mount /dev/disk0.0 fat /mnt
> block_cache: blk->ops->read returned 0
> sid1-noah:/ cp /mnt/coblock_cache: blk->ops->read returned 0
> nsole_image.jffs2 /mnt/console_image.jffs2-backup
> block_cache: blk->ops->read returned 0
> block_cache: blk->ops->read returned 0
> block_cache: blk->ops->read returned 0
> block_cache: blk->ops->read returned 0
> block_cache: blk->ops->read returned 0
> block_cache: blk->ops->read returned 0
>  block_cache: blk->ops->read returned -110
>

Since I have seen this in the kernel as well, I suspect there is something
wrong with my eSDHC interface or we're missing some mx25 errata quirks that
are present in the kernel. So I went ahead and enabled PIO mode and also
DEBUG in drivers/mci/imx-esdhc.c, which got me this:

barebox 2012.05.0-00200-g23273ec-dirty #7 Tue May 29 13:35:43 CEST 2012


Board: SID1 NOAH
registered netconsole as cs1
noah_read_ccm_regs: CCM CRDR = 00000000
noah_read_ccm_regs: CCM RCSR = 01020820
noah_read_ccm_regs: Booting from WEIM: NOR
imx-esdhc@mci0: registered as mci0
imx-esdhc@imx-esdhc0: set clock: wanted: 400000 got: 377840
imx-esdhc@imx-esdhc0: pre_div: 8 div: 10
imx-esdhc@imx-esdhc0: set clock: wanted: 200000 got: 188920
imx-esdhc@imx-esdhc0: pre_div: 16 div: 10
imx-esdhc@imx-esdhc0: set clock: wanted: 200000 got: 188920
imx-esdhc@imx-esdhc0: pre_div: 16 div: 10
imx-esdhc@imx-esdhc0: set clock: wanted: 200000 got: 188920
imx-esdhc@imx-esdhc0: pre_div: 16 div: 10
imx-esdhc@imx-esdhc0: set clock: wanted: 50000000 got: 33250000
imx-esdhc@imx-esdhc0: pre_div: 0 div: 1
mci@mci0: registered disk0
imx25_devices_init: Adding NOR flash device
cfi_flash@cfi_flash0: cfi flash (id=01000000 vend=000002 manu=000001
devid=00007E extid=002301) at a0000000, size 64MB
imx25_devices_init: Adding initial NOR flash partitions
ehci@ehci0: USB EHCI 1.00
Malloc space: 0x83b00000 -> 0x83efffff (size  4 MB)
Stack space : 0x83af8000 -> 0x83b00000 (size 32 kB)
envfs: wrong magic on /dev/env0
no valid environment found on /dev/env0. Using default environment
running /env/bin/init...

Hit any key to stop autoboot:  2

type update_kernel nor [<imagename>] to update kernel into flash
type update_root nor [<imagename>] to update rootfs into flash

sid1-noah:/ mkdir /nmnt
sid1-noah:/ mkdir /mnt
sid1-noah:/ mount /dev/disk0.0 fat /mnt
block_cache: blk->ops->read returned 0
sid1-noah:/ cp /mnt/block_cache: blk->ops->read returned 0

/mnt/barebox-mmc.bin
/mnt/barebox-nor.bin
/mnt/console_image.jffs2
/mnt/console_image.jffs2-2
/mnt/console_image.jffs2-backup
/mnt/kernel-sid1-noah.tgz
/mnt/u-boot.bin
/mnt/uImage
/mnt/uImage-2.6.39.3-hotfix-2012-04-noah-stable.bin
/mnt/uImage-linux-3.3.4-noah-stable.bin
/mnt/uimage.bin
sid1-noah:/ cp /mnt/console_image.jffs2 /mnt/console_image.jffs2-backup
block_cache: blk->ops->read returned 0
block_cache: blk->ops->read returned 0
block_cache: blk->ops->read returned 0
block_cache: blk->ops->read returned 0
block_cache: blk->ops->read returned 0
block_cache: blk->ops->read returned 0

Data Write Failed in PIO Mode.imx-esdhc@imx-esdhc0: timeout 2
imx-esdhc@imx-esdhc0: timeout 1
imx-esdhc@imx-esdhc0: timeout 1
imx-esdhc@imx-esdhc0: timeout 1
block_cache: blk->ops->read returned -110
BUG: failure at common/block.c:249/block_put()!
BUG!
[<83f348f0>] (unwind_backtrace+0x0/0x90) from [<83f1bfe0>] (panic+0x28/0x3c)
[<83f1bfe0>] (panic+0x28/0x3c) from [<83f05900>] (block_put+0x48/0x8c)
[<83f05900>] (block_put+0x48/0x8c) from [<83f059ec>]
(block_write+0xa8/0x120)
[<83f059ec>] (block_write+0xa8/0x120) from [<83f2d3c4>]
(cdev_write+0x30/0x34)
[<83f2d3c4>] (cdev_write+0x30/0x34) from [<83f308bc>] (disk_write+0x24/0x30)
[<83f308bc>] (disk_write+0x24/0x30) from [<83f2fa08>] (f_write+0x160/0x27c)
[<83f2fa08>] (f_write+0x160/0x27c) from [<83f3067c>] (fat_write+0x18/0x30)
[<83f3067c>] (fat_write+0x18/0x30) from [<83f3116c>] (write+0xac/0xd0)
[<83f3116c>] (write+0xac/0xd0) from [<83f217b0>] (copy_file+0xec/0x17c)
[<83f217b0>] (copy_file+0xec/0x17c) from [<83f1912c>] (do_cp+0x124/0x158)
[<83f1912c>] (do_cp+0x124/0x158) from [<83f07bb0>]
(execute_command+0x38/0x7c)
[<83f07bb0>] (execute_command+0x38/0x7c) from [<83f03bc8>]
(run_list_real+0x8a0/0x998)
[<83f03bc8>] (run_list_real+0x8a0/0x998) from [<83f03e04>]
(parse_stream_outer+0x144/0x240)
[<83f03e04>] (parse_stream_outer+0x144/0x240) from [<83f041fc>]
(run_shell+0x3c/0x5c)
[<83f041fc>] (run_shell+0x3c/0x5c) from [<83f09640>]
(start_barebox+0xd4/0x110)
[<83f09640>] (start_barebox+0xd4/0x110) from [<8010206c>] (0x8010206c)

I am pretty sure we need to switch to 1BIT transfer and/or using the
SDHCI_BROKEN_TIMEOUT_VAL
quirk. I'll try to find out if I can add this functionality to barebox,
unless you believe there's something else which causes this behaviour.

I'll keep investigating ...

Cheers
Roberto