[U-Boot] mmcinit in U-Boot

[U-Boot] mmcinit in U-Boot

[Valerio Bardelli]

Hi all,

we have a board based on AT91SAM9263 (Atmel) CPU and we use your U-Boot 
to debug the hardware and to boot OpenEmbedded Linux. Very good free 
product! ;))

In our board we have also a micro SD card reader and we would test it in 
U-Boot. Over the internet I see that in "some" U-Boot there are 
"mmcinit" and "fatload" commands, but I'm not be able to reach it in 
your U-Boot and also in your documentation. Is there any possibility to 
use the micro SD in your U-Boot?

The version is (result of ver command): U-Boot 2009.06 (gen 20 2010 - 
16:17:59)

Just another question... we need to boot from our micro SD and reach the 
U-Boot (from Micro SD) in order to write the NAND for the first time 
after board production. We are able to boot from SD card with 
AT91Bootstrap, but is there the possibility to run also the U-Boot from 
the SD?

Any help is greatly appreciated.

Thank you very much!

Have a nice day, Valerio


-- 

*///Valerio Bardelli/*
R&D Software Department

?h^? Microhard S.r.l.
Via Primo Maggio, 36
I - 20028 San Vittore Olona (MI)
Telefono +390331514420
Fax +390331514707
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[U-Boot] mmcinit in U-Boot

[Wolfgang Denk]

Dear Valerio Bardelli,

In message <4DBA7D2E.5000101@microhard.biz> you wrote:
>
> we have a board based on AT91SAM9263 (Atmel) CPU and we use your U-Boot 
> to debug the hardware and to boot OpenEmbedded Linux. Very good free 
> product! ;))

The at91sam9263ek board is supported in Mainline U-Boot, but this does
not appear to contain any MMC support.

> In our board we have also a micro SD card reader and we would test it in 
> U-Boot. Over the internet I see that in "some" U-Boot there are 
> "mmcinit" and "fatload" commands, but I'm not be able to reach it in 
> your U-Boot and also in your documentation. Is there any possibility to 
> use the micro SD in your U-Boot?

You will have to add / adapt the MMC drivers.

> The version is (result of ver command): U-Boot 2009.06 (gen 20 2010 - 
> 16:17:59)

Ouch.  That's very old, and very likely an out-of-tree port. So you
will probably have to start with bringing your board support up to
date and based on a mainline U-Boot version.

> Just another question... we need to boot from our micro SD and reach the 
> U-Boot (from Micro SD) in order to write the NAND for the first time 
> after board production. We are able to boot from SD card with 
> AT91Bootstrap, but is there the possibility to run also the U-Boot from 
> the SD?

Yes, this is possible. It will require some work, though.

Best regards,

Wolfgang Denk

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