Re: [PATCH] MTD-NAND: Changes to read_page APIs to supportNAND_ECC_HW_SYNDROME mode on TI DaVinci DM355
From: Thomas Gleixner
Date: Mon Apr 06 2009 - 19:08:24 EST
Sneha,
On Wed, 1 Apr 2009, nsnehaprabha@xxxxxx wrote:
Would you please care to CC the still caring but admittedly lazy and
distracted maintainer on such patches ?
> From: Sneha Narnakaje <nsnehaprabha@xxxxxx>
>
> The NAND controller on TI DaVinci DM355 supports NAND devices with large page size (2K and 4K), but the HW ECC is handled for every 512byte read/write chunks. The current HW_SYNDROME read_page/write_page APIs in the NAND core (nand_base) use the "infix OOB" scheme. The core APIs overwrite NAND manufacturer's bad block meta data, thus complicating the jobs of non-Linux NAND programmers (end equipment manufacturering). These APIs also imply ECC protection for the prepad bytes, causing nand raw_write operations to fail.
Please use proper line breaks. 523 characters do not fit into a
terminal.
Thanks,
tglx
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