Zipit/uboot mmc driver issue

[Phip]

2010/11/18 Marek Vasut <marek.vasut at gmail.com>

> On Thursday 18 November 2010 10:26:49 Phip wrote:
> > Greetings,
> >
> > I am having difficulties with the Zipit mmc driver and my SDHC card. I
> > realize this may be an imposition; I write to you because I am trying to
> > determine if the problem is with the mmc driver or elsewhere. I was not
> > having any problems with SD card I/O under blob; this began when I
> flashed
> > to u-boot.
>
> Blob doesn't support SD/MMC at all. You mean linux kernel ?
>
Yes; My mistake.

> >
> > dmesg comes to mounting root:
> >
> > pxa-rtc pxa-rtc: setting system clock to 2000-01-01 00:00:18 UTC
> > Waiting 2sec before mounting root device...
> > mmc0: host does not support reading read-only switch. assuming
> > write-enable. mmc0: new SDHC card at address 1234
> > PM: Adding info for mmc:mmc0:1234
> > mmcblk0: mmc0:1234 SA04G 2.68 GiB
>
> The card is mis-detected ?
>
This was a  typo -- it consistently reads 3.68 GiB.

> >
> > Then a few cycles of write errors like these:
> >
> > mmcblk0: error -84 transferring data, sector 243, r 8, card status 0xe00
> > end_request: I/O error, dev mmcblk0, sector 243
> > Buffer I/O error on device mmcblk0p1, logical block 0
> > lost page write due to I/O error on mmcblk0p1
> >
> > And finally EXT3-fs detects a problem with the journal and remounts the
> > filesystem read-only.
> >
> > I do not mean to ask you to troubleshoot me, but it seems like you would
> be
> > the best person to ask about this particular combination of hardware and
> > software. Or perhaps there is a better place for me to ask?
>
> CCing linux-arm-kernel
> >
> > Thank you very much for your time
> > Phip
> >
> > - Zipit running u-boot 8/23/2010; 2.6.35 8/22/2010; both from mozzwald
> > - SD card is a Kensington 4GB microSD in a miniSD adapter; works
> flawlessly
> > on my desktop box.
>
> Maybe the adapter is faulty, try another one. It happened a lot before.
>

I'll look for another adapter to verify if there are no other leads to try.

Regards
Phip

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