[U-Boot] [PATCH v2a] AT91: add SD/MMC support

[Reinhard Meyer]

Dear Schleifer, Alexander,
> Hello Reinhard,
> 
> thanks for your reply.
> I checked the register settings and sorted out, that the SDCBUS was initialized in 4-bit mode by the bootstrap.
> 
> So I added the explicit initialization when port A is used:
> 
> #if defined(CONFIG_ATMEL_MCI_PORTB)
>         mmci_writel(SDCR, (MMCI_BF(SCDSEL, 1)
>                          | MMCI_BF(SCDBUS, 0)));
> #else
>         mmci_writel(SDCR, (MMCI_BF(SCDSEL, 0)
>                          | MMCI_BF(SCDBUS, 0)));
> #endif
Arghh, thats why getting the "geometry" worked, but not a block read.

And you were right, the new driver would have handled that correctly :)

Since currently the new driver is among the "newest" in my series of
changes here, I'll have to try to rebase to get it to the "oldest"
position.

Reinhard