[U-Boot] [PATCH] mmc: omap: handle controller errors properly

Pali Rohár pali.rohar at gmail.com
Wed Mar 21 20:11:08 CET 2012

On Monday 19 March 2012 15:14:39 Tom Rini wrote:
> On 03/19/2012 03:12 PM, Grazvydas Ignotas wrote:
> > According to OMAP3 TRM, when the controller reports certain
> > errors, driver must perform a software reset. This is done by
> > setting a bit in SYSCTL and waiting it to clear:
> > - SRC on command timeout (CTO)
> > - SRD on data errors (DTO, DCRC and DEB)
> > 
> > This fixes a problem seen on OMAP3 pandora board with some cards
> > 
> > that won't work with a message printed multiple times:
> >    timedout waiting on cmd inhibit to clear
> > 
> > Code loosely based on Linux omap_hsmmc driver.
> > 
> > Signed-off-by: Grazvydas Ignotas<notasas at gmail.com>
> Most excellent!  Pali, can you try this on N900 and see if that
> helps out the problem you were having as well?
> Andy, I'll give this a spin through the boards I've got here but
> I'd like this to go, via your tree, into u-boot/master assuming
> all goes well.


I tried this patch and it 
really fixed problem on Nokia N900.

Pali Rohár
pali.rohar at gmail.com
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