[U-Boot] BCH8 support when we do not have ELM h/w engine.

[Enric Balletbo Serra]

Hi Pekon,

2014/1/13 Gupta, Pekon <pekon at ti.com>:
> Hi Enric,
>
>>
>>Hi Pekon,
>>
>>2013/12/10 Gupta, Pekon <pekon at ti.com>:
>>> Hi Enric,
>>>
>>> Sorry I missed your earlier mail, so din't check this..
>>>
>>>>From: Enric Balletbo Serra [mailto:eballetbo at gmail.com]
>>>>>
>>>>> I saw that the OOB layout is not the same when I flash the rootfs from
>>>>> the u-boot or from the kernel. For example:
>>>>>
>>>>> If the rootfs is flashed from the kernel the OOB data is like that:
>>>>>
>>>>> U-Boot # nand dump.oob 0x680000
>>>>> Page 00680000 dump:
>>>>> OOB:
>>>>>     ff ff 79 43 68 64 3b 80
>>>>>     b2 46 49 4d 58 2a 6d ff
>>>>>     52 3f 7d 2a 7f a2 98 70
>>>>>     57 32 30 35 c7 ff ff ff
>>>>>     ff ff ff ff ff ff ff ff
>>>>>     ff ff ff ff ff ff ff ff
>>>>>     ff ff ff ff ff ff ff ff
>>>>>     ff ff ff ff ff ff ff ff
>>>>>
>>>>> If the rootfs is flashed for the u-boot the OOB data is like data:
>>>>>
>>>>> Page 00680000 dump:
>>>>> OOB:
>>>>>     ff ff 79 43 68 64 3b 80
>>>>>     b2 46 49 4d 58 2a 6d 52
>>>>>     3f 7d 2a 7f a2 98 70 57
>>>>>     32 30 35 c7 ff ff ff ff
>>>>>     ff ff ff ff ff ff ff ff
>>>>>     ff ff ff ff ff ff ff ff
>>>>>     ff ff ff ff ff ff ff ff
>>>>>     ff ff ff ff ff ff ff ff
>>>>>
>>>>> Note that look the same except after byte number 16. In the first case is
>>>>>     ff 52 3f 7d 2a 7f a2 98 70
>>>>> and in the second case is
>>>>>     52 3f 7d 2a 7f a2 98 70
>>>>>
>>>>> It's possible that something is wrong writting the OOB data ? Any clue
>>>>> ? I'm in the right direction or completely wrong ?
>>>>>
>>> Yes, there seems to be an mis-match between u-boot and kernel
>>> ecc-layout. Give me a day's time, and I'll try to root cause this.
>>> However, don't have OMAP3 boards, so I can test this only on other boards.
>>>
>>> with regards, pekon
>>
>>If I can help somehow just let me know.
>>
> I have posted the patches to fix this regression between u-boot and kernel.
> And was expecting if you could test it confirm if this solves regression on your
> OMAP3 board.
> http://lists.infradead.org/pipermail/linux-mtd/2014-January/051384.html
>
> You can download the patch from [1]
> [1] http://lists.infradead.org/pipermail/linux-mtd/2013-December/050944.html
>
>
> with regards, pekon

Thanks for the patches, I tested and worked for me on our OMAP3 based
boards, I'll answer the mail that you sent to the linux-omap ML.

Sorry for the delay, cheers,

   Enric