[U-Boot] at91sam9260ek and mmc

[Jan Pohanka]

Dear Reinhard,

during last week I have been trying to make sd card in u-boot working on  
at91sam9260ek, unfortunately without success. I have posted some details  
in this post on the mailing list  
http://lists.denx.de/pipermail/u-boot/2011-June/093666.html

I'm almost sure that it is not a hardware issue, because in Linux booted  
 from nand flash sd works like a charm, even mounting rootfs on the sd is  
possible.

You stated, that you have sd card working in your development branch,  
could you share it, please? It seems I'm not able to fix it by myself :(

with best regards
Jan


Dne Mon, 30 May 2011 21:07:37 +0200 Reinhard Meyer  
<u-boot at emk-elektronik.de> napsal(a):

> Dear Jan Pohanka,
>
>> I'm trying to get u-boot 2010.12 working on at91sam9260ek devkit with
>> mmc support. I have read several discussions here and followed the
>> steps described in README.atmel-mci. (my config and board file are
>> below...)
>
> 2010.12 is outdated. Use current top of tree. Besides I have a mmc  
> enabled
> (and working) 9260ek port in my WIP branch that I will post soon.
>
>> There are two issues I'm facing.
>>
>> The first one: When I enable mmc support, the dataflash stops to work.
>> According to info from boot process, dataflash is detected correctly,
>> but no data can be read (environment) or written.
>
> Dataflash and MMC are mutually exclusive on the 9260ek. Only one should  
> be
> enabled and used.
>
>> The second one: fatls command causes u-boot to freeze with following  
>> message
>
> You have to remove the CS jumper to the dataflash chip, otherwise you get
> contention between mmc and dataflash hardware.
>
> Reinhard


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