Re: tifm_7xx1: SD card is ignored
From: Kim Hansen
Date: Fri May 23 2008 - 05:32:57 EST
On Wed, May 21, 2008 at 2:21 PM, Pierre Ossman <drzeus@xxxxxxxxx> wrote:
> On Wed, 7 May 2008 18:50:54 +0200
> "Kim Hansen" <kimhanse@xxxxxxxxx> wrote:
>
>> Now it just looks like it sometimes work and other times don't, on
>> some kernels it works on 80% inserts and on other it only works on 5%.
>> This means that the problem most likely has not been fixed between
>> 2.6.24 and 2.6.25, it was just a coincidence that it worked on on and
>> not the other the first few times I tested it.
>
> I missed the start of this, but I assume it is just the one card that
> exhibits this craziness?
I can reproduce it on 3 different cards: SD 512MB, SD 4GB, MMC 64kB.
>> I have captured some logs now, there is logs of a successful insert
>> and remove, and of an unsuccessful.
>>
>> Successful insert: 16:18:50 remove: 16:20:26
>> Unsuccessful insert: 16:21:38 remove: 16:21:47
>>
>> The log can be found at: http://i9.dk/~kim/mmc-log.txt.bz2
>>
>> This is the part from the unsuccessful insert:
>
> *snip*
>
>> sdhci [sdhci_irq()]: *** sdhci:slot0 got interrupt: 0x00000001
>> mmc0: req done (CMD5): 0: ffffffff 00000000 00000000 00000000
>
> What can I say, the card thinks it's an SDIO card. :)
>
> The question is why. Might be some shoddy wiring between the card and
> the controller that causes some unlucky misinterpretations. Might also
> be that the card needs some increased delay to function correctly. Try
> adding:
>
> msleep(500);
>
> to mmc_rescan() in drivers/mmc/core/core.c. Put it right after
> mmc_power_up().
I will try that.
--
Kim Hansen
Vadgårdsvej 3, 2.tv
2860 Søborg
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