[U-Boot] U-Boot and CONFIG_SYS_DAVINCI_BROKEN_ECC

[Stephen Irons <stephen.irons@tait.co.nz>]

Does this help at all: at any rate, it is a bit of the history of the 
u-boot code:

http://lists.denx.de/pipermail/u-boot/2008-August/039679.html

Stephen Irons


David Brownell wrote:
> I was looking at the DaVinci NAND support in current U-Boot
> code (i.e. 2009.03 plus patches merged since that release),
> and am puzzled by the above-named config option.
>
> Before I submit a patch to remove it from U-Boot GIT (nothing
> there enables it, and it will nastify 4-bit support), I thought
> I'd see if anyone knows exactly what software it was trying to
> emulate.  Differences from the current NAND driver in GIT:
>
>  - Matches MVL 4.0 (2.6.10) and 5.0 (2.6.18) drivers in handling
>    NANDx1ECC registers:  0PQR0stu maps to PsQRtu, while the NAND
>    driver in mainline maps it to ~PQRstu.
>
>  - Custom ECC layouts, "not compatible with Linux or RBL/UBL".
>
>  - Does some very broken stuff for large page support.
>
> The first of those I can understand; someone wrote some odd and
> overly-complex ECC code way back, it worked and then got shipped.
> (Although TI's U-Boot 1.2.0 uses soft ECC, instead...)
>
> The other two look like they were experimental code that
> should probably not have been merged anywhere...
>
> - Dave
>
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>   


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