[U-Boot] NAND Flash with Internal Hardware ECC

[Josh Wu]

Hello, Dave

On 3/26/2015 4:45 PM, Rajiv Dave wrote:
> Hi,
>
> We are using an Atmel AT91SAM9263 processor which supports 1 Bit ECC flash
> devices that have Block 0 Valid with no ECC. These devices are now obsolete.
>
> We have fitted a board with a MT29F2G08ABAEWP-E-E, which has an internal
> Hardware ECC engine. Would you know how provide support for this device
> within U-Boot?
As your flash have internal ecc, you should disable the AT91SAM9263 ecc.

it means you need to set the nand->ecc.mode to NAME_ECC_NONE
in the U-Boot if you already enabled internal Hardware ECC.


Best Regards,
Josh Wu
>
> The following output is generated by a board fitted with the NAND Flash with
> Internal Hardware ECC
>
> RomBOOT
>
> U-Boot 1.3.4 (Sep 19 2013 - 15:10:38)
>
> DRAM:  64 MB
> NAND:  256 MiB
> No Valid Environment Area Found
> In:    serial
> Out:   serial
> Err:   serial
> Net:   macb0
> macb0: Starting autonegotiation...
> macb0: Autonegotiation timed out (status=0x7849)
> macb0: link down (status: 0x7849)
> Hit any key to stop autoboot:  3  2  1  0
>
> NAND read: device 0 offset 0x200000, size 0x17e16c
>   1565036 bytes read: ERROR
> ## Booting kernel from Legacy Image at 22200000 ...
>     Image Name:   Linux-2.6.30
>     Image Type:   ARM Linux Kernel Image (uncompressed)
>     Data Size:    1564972 Bytes =  1.5 MB
>     Load Address: 20008000
>     Entry Point:  20008000
>     Verifying Checksum ... Bad Data CRC
> ERROR: can't get kernel image!
> U-Boot>
>
> Regards
>
> Rajiv Dave
>
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