Hello Durga,
On 05/25/2015 09:01 AM, S Durga Prasad Paladugu wrote:
Hi all,
I am having an ext4write issue on zynq, which fails when i am trying to
write a file to ext4 formatted SD card. here is the log below.
zynq-uboot> ext4ls mmc 0:2
<DIR> 1024 .
<DIR> 1024 ..
<DIR> 1024 lost+found
zynq-uboot>
zynq-uboot>
zynq-uboot> ext4write mmc 0:2 0x40000000 /bar.txt 10
File System is consistent
sdhci_send_command: MMC: 0 busy timeout increasing to: 200 ms.
sdhci_send_command: MMC: 0 busy timeout increasing to: 400 ms.
sdhci_send_command: MMC: 0 busy timeout increasing to: 800 ms.
sdhci_send_command: MMC: 0 busy timeout increasing to: 1600 ms.
sdhci_send_command: MMC: 0 busy timeout increasing to: 3200 ms.
It seem that your card is slowly.
You can test it by:
- increasing this timeout by adding: "#define
CONFIG_SDHCI_CMD_MAX_TIMEOUT 10000 " (10 sec) to your board config.
- you can try erase your card by command: mmc erase ...,
and then create new partition table and filesystems.
- try another sd card ?
Usually, when card is busy, it means that the last command didn't
finished and/or the card is doing some background operations. I have
seen this for in few eMMC cards, but for eMMC we can enable bkops
manually and wait until card finishes.
sdhci_send_command: MMC: 0 busy timeout.
sdhci_send_command: MMC: 0 busy timeout.
sdhci_send_command: MMC: 0 busy timeout.
sdhci_send_command: MMC: 0 busy timeout.
sdhci_send_command: MMC: 0 busy timeout.
sdhci_send_command: MMC: 0 busy timeout.
sdhci_send_command: MMC: 0 busy timeout.
** ext4fs_devread read error - block
sdhci_send_command: MMC: 0 busy timeout.
sdhci_send_command: MMC: 0 busy timeout.
** ext4fs_devread read error - block
Error in getting the block group descriptor table
sdhci_send_command: MMC: 0 busy timeout.
sdhci_send_command: MMC: 0 busy timeout.
** ext2fs_devread() read error **
sdhci_send_command: MMC: 0 busy timeout.
** ext4fs_devread read error - block
sdhci_send_command: MMC: 0 busy timeout.
sdhci_send_command: MMC: 0 busy timeout.
** ext4fs_devread read error - block
sdhci_send_command: MMC: 0 busy timeout.
error in File System init
** Error ext4fs_write() **
zynq-uboot>
sdhci_send_command: MMC: 0 busy timeout.
** Can't read partition table on 0:0 **
** Invalid partition 2 **
zynq-uboot> ext4ls mmc 0:2
sdhci_send_command: MMC: 0 busy timeout.
** Can't read partition table on 0:0 **
** Invalid partition 2 **
zynq-uboot>
I further debugged and found that the same is working with single block
write commands instead of multi block write commands. Here is the diff of
the changes i made to make it single block write.
drivers/mmc/mmc_write.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/mmc_write.c b/drivers/mmc/mmc_write.c
index aa2fdef..269d233 100644
--- a/drivers/mmc/mmc_write.c
+++ b/drivers/mmc/mmc_write.c
@@ -167,7 +167,7 @@ ulong mmc_bwrite(int dev_num, lbaint_t start, lbaint_t
blkcnt, const void *src)
return 0;
do {
- cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo;
+ cur = 1;
if (mmc_write_blocks(mmc, start, cur, src) != cur)
return 0;
blocks_todo -= cur;
Best regards,
--
Przemyslaw Marczak
Samsung R&D Institute Poland
Samsung Electronics
[email protected]
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