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

[Gupta, Pekon]

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