[U-Boot] sam9x5 can't find Nand flash

[Bo Shen]

Hi Alex,

On 11/19/2012 13:40, alex wrote:
> more information. samba script as below:
>
> ## Falshing binaries
> puts "-I- === Initialize the NAND access ==="
> NANDFLASH::Init
>
> puts "-I- === Enable PMECC OS Parameters ==="
> NANDFLASH::NandHeaderValue HEADER 0xc0c00405
>
> puts "-I- === Erase all the NAND flash blocs and test the erasing ==="
> NANDFLASH::EraseAllNandFlash
>
> puts "-I- === Load the bootstrap: nandflash_at91sam9-ek in the first
> sector ==="
> NANDFLASH::SendBootFilePmeccCmd $bootstrapFile
>
> puts "-I- === Load the u-boot image ==="
> send_file {NandFlash} "$ubootFile" $ubootAddr 0
>
> puts "-I- === Load the u-boot env image ==="
> send_file {NandFlash} "$ubootenvFile" $ubootenvAddr 0
>
> puts "-I- === Load the Kernel image ==="
> send_file {NandFlash} "$kernelFile" $kernelAddr 0
>
> puts "-I- === Enable trimffs ==="
> NANDFLASH::NandSetTrimffs 1
>
> puts "-I- === Load the linux file system ==="
> send_file {NandFlash} "$rootfsFile" $rootfsAddr 0
>
> puts "-I- === DONE. ==="
>

This is no help. Without any useful information.

>
>
> At 2012-11-19 13:37:15,alex <laub923 at 163.com> wrote:
>
>     I use u-boot v2010.06 with atmel's patch. I give u-boot 512K size.
>
>     U-Boot 2010.06-00002-gb006d3d-dirty (Nov 19 2012 - 09:53:38)
>
>     DRAM:  128 MiB
>     NAND:  No NAND device found!!!
>     NAND Flash not found !
>     No NAND device found!!!
>     0 MiB

You should also provide bootstrap log info.

I think the code is get from www.at91.com/linux4sam.

Anyway, I assume that you use the source code and package get for the 
upper website. If so, the u-boot environment you change is overlap with 
u-boot. (If you write the u-boot at offset 0x40000, the size is larger 
than 256K, that means: u-boot offset + u-boot size > 0x80000). So, when 
save environment, it will overwrite the u-boot, which cause this issue.

Please check it again. If all thing as I guess, you can change the 
u-boot offset to 0x20000, or change environment offset to 0xa0000. you 
can choose which you prefer.

Best Regards,
Bo Shen

>
>
>     At 2012-11-19 11:19:25,"Bo Shen" <voice.shen at atmel.com  <mailto:voice.shen at atmel.com>> wrote:
>     >Hi Alex,
>     >
>     >On 11/19/2012 10:55, alex wrote:
>     >>   Hi MAINTAINER:
>     >>    Now I develop our product based on sam9x25 EVK, and redefine our NAND
>     >> partitions. I set u-boot environment in flash address0x80000.
>     >> if "saveenv" and "reset", u-boot will print "can't find NAND flash". If
>     >> I set u-boot environment in the address 0xc0000 as EVK board, it's OK. I
>     >> cant' know the reason.
>     >
>     >Which u-boot version do you use? Please also paste the u-boot boot log here.
>     >
>     >Please also check the u-boot file size, will the env overlap with it?
>     >
>     >Best Regards,
>     >Bo Shen
>     >
>
>
>
>
>