[U-Boot] MMC broken after a7778f8fbee098c78b1fa1e1331313a7e217fb30

Pali Rohár pali.rohar at gmail.com
Sun Mar 4 21:32:37 CET 2012

On Sunday 04 March 2012 13:23:44 Tom Rini wrote:
> On Sun, Mar 4, 2012 at 1:06 PM, Pali Rohár <pali.rohar at gmail.com> wrote:
> > Hi,
> > 
> > this commit is breaking MMC support on Nokia N900:
> > a7778f8fbee098c78b1fa1e1331313a7e217fb30 omap_hsmmc: Wait for CMDI to be
> > clear
> > 
> > I'm geting only error message "timedout waiting on cmd inhibit to clear"
> > and I cannot read files from eMMC and SD card. When I reverted commit
> > that commit I all is OK.
> OK, we need to debug what the n900 is doing (do you see this in qemu,
> real HW or both?) since clearing the bit fixes certain SD cards on
> other boards (beagleboard and gumstix iirc, but it was a generic
> issue).  Thanks!

RX-51 build of U-Boot in qemu cannot read mmc. It report error about bad 
voltage. This was problem also before that commit. RX-51 Linux kernel does not 
have any problem with mmc, special prepaired Maemo 5 image (with some SW on 
eMMC) from Nokia working fine in qemu.

I ignored above problem in qemu, because mmc worked fine on real n900. But 
after that commit mmc does not working on real n900 too.

Pali Rohár
pali.rohar at gmail.com
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