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

[Gupta, Pekon]

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