[U-Boot] [PATCH] ARM DaVinci: Fix broken HW ECC for large page NAND.

[Scott Wood]

On Sat, Aug 30, 2008 at 05:06:55PM -0400, Hugo Villeneuve wrote:
> ARM DaVinci: Fix broken HW ECC for large page NAND.
> 
> Signed-off-by: Hugo Villeneuve <hugo.villeneuve at lyrtech.com>
> 
> ---
> 
> Based on original patch by Bernard Blackham <bernard at largestprime.net>
> 
> U-boot's HW ECC support for large page NAND on Davinci is completely
> broken.  Some kernels, such as the 2.6.10 one supported by
> MontaVista for DaVinci, rely upon this broken behaviour as they
> share the same code for ECCs. In the existing scheme, error
> detection *might* work on large page, but error correction
> definitely does not.  Small page ECC correction works, but the
> format is not compatible with the mainline git kernel.
> 
> This patch adds ECC code that matches what is currently in the
> Davinci git repository (since NAND support was added in 2.6.24).
> This makes the ECC and OOB layout written by u-boot compatible with
> Linux for both small page and large page devices and fixes ECC
> correction for large page devices.
> 
> The old behaviour can be restored by defining the macro
> CFG_DAVINCI_BROKEN_ECC, which is undefined by default.

Applied to u-boot-nand-flash.  Next time, please put the commit message
above the "---", except for extra commentary that isn't intended to go
into the git history.

-Scott