[U-Boot-Users] AMCC Bamboo boot from NAND Flash is broken

[U-Boot-Users] AMCC Bamboo boot from NAND Flash is broken

[Eugene O'Brien]

Hi Stefan,

Yesterday I decided to update u-boot from the u-boot-ppc4xx repo. I boot my board similarly to the Bamboo NAND flash boot. So after I re-flashed U-Boot ... nothing ... I bricked my board ... thanks!

The good news is that the fix is relatively simple. I took a look at the code and I see that the SDRAM is no longer initialised anywhere. I renamed function early_sdram_init() to initdram() and returned the fixed SDRAM size. I made this trivial change from looking at the code in nand_spl/board/amcc/canyonlands/ddr2_fixed.c. After that my board booted correctly. The corresponding change to Bamboo must be done in nand_spl/board/amcc/bamboo/sdram.c.

If you're looking for a patch from me, it might take some time so I suggest you make this change yourself. The commit change that breaks the Bamboo code is "ppc4xx/NAND_SPL:?Consolidate?405?and?440?NAND?booting?code?in?start.S"

Regards,
Eugene

[U-Boot-Users] AMCC Bamboo boot from NAND Flash is broken

[Stefan Roese]

Hi Eugene,

On Wednesday 04 June 2008, Eugene O'Brien wrote:
> Yesterday I decided to update u-boot from the u-boot-ppc4xx repo. I boot my
> board similarly to the Bamboo NAND flash boot. So after I re-flashed U-Boot
> ... nothing ... I bricked my board ... thanks!

Sorry about that. I hope you were able to get it back to "life".

> The good news is that the fix is relatively simple. I took a look at the
> code and I see that the SDRAM is no longer initialised anywhere. I renamed
> function early_sdram_init() to initdram() and returned the fixed SDRAM
> size. I made this trivial change from looking at the code in
> nand_spl/board/amcc/canyonlands/ddr2_fixed.c. After that my board booted
> correctly. The corresponding change to Bamboo must be done in
> nand_spl/board/amcc/bamboo/sdram.c.
>
> If you're looking for a patch from me, it might take some time so I suggest
> you make this change yourself. The commit change that breaks the Bamboo
> code is
> "ppc4xx/NAND_SPL:?Consolidate?405?and?440?NAND?booting?code?in?start.S"

Thanks for the description. I'll send a patch in a few minutes to the list. It 
would be great if you could ack it, when you think it is ok now.

Best regards,
Stefan

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