[U-Boot] [PATCH v3] AT91: Add SD/MMC controller support

[Sebastian Heutling]

Hello there,

I tried to get mmc working on a board using an at91sam9g20. The mmc-card 
is wired on slotb.

I applied the patches:

http://lists.denx.de/pipermail/u-boot/2009-September/060053.html
http://lists.denx.de/pipermail/u-boot/2009-August/059456.html
http://lists.denx.de/pipermail/u-boot/2009-September/060243.html

It didn't work as I always got (apart from the message of a too low 
clock which I avoided by setting f_min / f_max on my own):

mmc: command 8 failed (status: 0x0010c1e5)
mmc: command 55 failed (status: 0x0010c1e5)
mmc: command 1 failed (status: 0x0010c1e5)
Card did not respond to voltage select!

So I had a look at linux sources and discovered that the MCI selected 
the wrong slot. After modifying atmel_mci_set_ios() to set SDCR to use 
slotb ("mmci_writel(SDCR, sdcr | 1);") I got my card working.

Hope this helps someone.

Regards

Sebastian Heutling