[U-Boot] NAND Flash with Internal Hardware ECC

[Josh Wu]

Hi, Dave

On 3/27/2015 8:41 PM, Rajiv Dave wrote:
> Hi Josh,
>
> That worked! Many thanks.

You are welcome  ;-)

>
> The next issue is that the Kernel now needs to be re-built, we are using
> 2.6.xx, do you have any ideas on what to change in the Kernel to make it
> work with the HW ECC NAND?
If you are using the github/linux-2.6.39-at91 branch, you need change 
the arch/arm/mach-at91/board-sam9263ek.c to set .ecc_mode as NAND_ECC_NONE.

Best Regards,
Josh Wu
>
>
> Regards
>
> Rajiv Dave
>
> Disign Consultants
> t: +44 (0) 207 544 8486
> w: www.disignconsultants.com
>
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>> From: Josh Wu <josh.wu at atmel.com>
>> Date: Fri, 27 Mar 2015 10:52:29 +0800
>> To: Rajiv Dave <rajivd at disignconsultants.com>, <u-boot at lists.denx.de>
>> Subject: Re: [U-Boot] NAND Flash with Internal Hardware ECC
>>
>> 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
>>>
>>> Disign Consultants
>>> t: +44 (0) 207 544 8486
>>> w: www.disignconsultants.com
>>>
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