MMC not working on Z71

MMC not working on Z71

[Marek Vašut]

Hi,
since this commit
http://source.mvista.com/git/gitweb.cgi?p=linux-omap-2.6.git;a=commit;h=36808520ce2c9ade647d36c80004c158c71d0510
MMC on palmz71 stopped working. With latest git it doesnt even get inited. 
When I enable debug I get cmd3 timeout. I find out that when I compile 
initramfs into kernel and try mounting mmc partition, the kernel tries to 
init the card (I get that MMC: something and mmc: p1 p2 etc. [sorry, I dont 
remember it exactly, I can give more details, if you need them, just ask]) 
but fails with a lot of io errors about probs with reading mmc block 0. And 
that´s the end. Weird is, that mmc was working with 2618-omap1, but after 
that sync with Linuses tree it just suddenly stopped. The diff against those 
2 commits is 32megs, so it´s quite a prob to find what damaged the mmc. Also, 
it´s weird that mmc works on palmte. Can this be prob, that mmc isnt powered 
up? I doubt so though.

Thanx for any ideas.

Best regards
Marek Vasut

Re: MMC not working on Z71

[tony]

* Marek Vašut <marek.vasut@gmail.com> [061126 15:17]:
> Hi,
> since this commit
> http://source.mvista.com/git/gitweb.cgi?p=linux-omap-2.6.git;a=commit;h=36808520ce2c9ade647d36c80004c158c71d0510
> MMC on palmz71 stopped working. With latest git it doesnt even get inited. 
> When I enable debug I get cmd3 timeout. I find out that when I compile 
> initramfs into kernel and try mounting mmc partition, the kernel tries to 
> init the card (I get that MMC: something and mmc: p1 p2 etc. [sorry, I dont 
> remember it exactly, I can give more details, if you need them, just ask]) 
> but fails with a lot of io errors about probs with reading mmc block 0. And 
> that´s the end. Weird is, that mmc was working with 2618-omap1, but after 
> that sync with Linuses tree it just suddenly stopped. The diff against those 
> 2 commits is 32megs, so it´s quite a prob to find what damaged the mmc. Also, 
> it´s weird that mmc works on palmte. Can this be prob, that mmc isnt powered 
> up? I doubt so though.

Yeah, that a big patch :) Have you tried just undoing the mmc parts in that
patch and see if that helps to narrow down the problem?

Regards,

Tony

Re: MMC not working on Z71

[Marek Vašut]

Dne čtvrtek 30 listopad 2006 23:39 jste napsal(a):
> * Marek Vašut <marek.vasut@gmail.com> [061126 15:17]:
> > Hi,
> > since this commit
> > http://source.mvista.com/git/gitweb.cgi?p=linux-omap-2.6.git;a=commit;h=3
> >6808520ce2c9ade647d36c80004c158c71d0510 MMC on palmz71 stopped working.
> > With latest git it doesnt even get inited. When I enable debug I get cmd3
> > timeout. I find out that when I compile initramfs into kernel and try
> > mounting mmc partition, the kernel tries to init the card (I get that
> > MMC: something and mmc: p1 p2 etc. [sorry, I dont remember it exactly, I
> > can give more details, if you need them, just ask]) but fails with a lot
> > of io errors about probs with reading mmc block 0. And that´s the end.
> > Weird is, that mmc was working with 2618-omap1, but after that sync with
> > Linuses tree it just suddenly stopped. The diff against those 2 commits
> > is 32megs, so it´s quite a prob to find what damaged the mmc. Also, it´s
> > weird that mmc works on palmte. Can this be prob, that mmc isnt powered
> > up? I doubt so though.
>
> Yeah, that a big patch :) Have you tried just undoing the mmc parts in that
> patch and see if that helps to narrow down the problem?
>
> Regards,
>
> Tony

Sure ;) I removed all patches for mmc but one - mmc-block.c.diff - which was 
too complexly integrated into the kernel. But it didnt helped though :( btw. 
yeah ... it is a bigger patch ;D

BR
Marex