[U-Boot] Problems around fatwrite command from uboot

[Jean Louis]

Hi Lukasz,

I test with an extended timeout and no effect.

I already test multiples SD with very good quality SD Card with same
problem (30-40 MB read / 10-20 MB write + SLC)
( just under the UHS-I SD cards )

The problem appears when FAT (or FAT entries) is inconsistent and despite a
repair, the problem persists on writes of other futures files by the ubbot
fatwrite command.

Thanks for your help.

----

2013/2/22 Lukasz Majewski <l.majewski at samsung.com>

> Hi Jean,
>
> > Hi,
> >
> > I use the last uboot from your git and boot with it on AM3517 EVM
> > from SD card
> > without NAND.
> >
> > I use this option in uboot config : #define CONFIG_FAT_WRITE 1
> >
> > I use intensively fatload / fatwrite commands at the boot before
> > kernel loading.
> >
> > Sometimes, in about 2% of cases of boot, the FAT becomes inconsistent
> > and I have
> > systematically these messages at boot when I use fatwrite command :
> >
> > U-Boot 2013.01-gd3b9a66-dirty (Feb 21 2013 - 11:02:33)
> > ...
> > writing MODIFYME.001
> > mmc_send_cmd: timedout waiting on cmd inhibit to clear
>
> Those kind of errors are caused by exceeding timeout for receiving
> response from your SD card.
>
> Could you try with other (different manufacturer) card?
>
> It seems like card/vendor specific - it depends on the firmware on the
> SD card.
>
> Please look into a similar thread:
>
> http://article.gmane.org/gmane.comp.boot-loaders.u-boot/150636/match=rfc+mmc+fix+increase+timeout+value+sdhci_send_command
>
>
> > mmc_send_cmd: timedout waiting on cmd inhibit to clear
> > mmc_send_cmd: timedout waiting on cmd inhibit to clear
> > mmc_send_cmd: timedout waiting on cmd inhibit to clear
> > mmc_send_cmd: timedout waiting on cmd inhibit to clear
> > mmc_send_cmd: timedout waiting on cmd inhibit to clear
> > mmc_send_cmd: timedout waiting on cmd inhibit to clear
> > mmc_send_cmd: timedout waiting on cmd inhibit to clear
> > mmc_send_cmd: timedout waiting on cmd inhibit to clear
> > mmc_send_cmd: timedout waiting on cmd inhibit to clear
> > mmc_send_cmd: timedout waiting on cmd inhibit to clear
> > 42428 bytes written
> > ...
> >
>
>
> --
> Best regards,
>
> Lukasz Majewski
>
> Samsung R&D Poland (SRPOL) | Linux Platform Group
>