[PATCH] mtd: nand: Take celltype into account when parsing Samsung ext. nand ID's

[Brian Norris]

Hi Robin,

On 10/31/2012 03:32 AM, Robin van der Gracht wrote:
> When using a Samsung nandflash with 2 level cells, the wrong page size,
> erase size and oobsize is calculated.
>
> I'm using a Samsung K9K8G08U0B nandflash (ID: 0xECD3519558). When booting the kernel i get:
> NAND device: Manufacturer ID: 0xec, Chip ID: 0xd3 (Samsung NAND 1GiB 3,3V 8-bit), page size: 4096, OOB size: 128
>
> This is wrong. My nand flash has a pagesize of 2048 and oobsize 64.
>
> This patch should work for all Samsung 6 byte ID chips, found on:
> http://www.linux-mtd.infradead.org/nand-data/nanddata.html
>
> Signed-off-by: Robin van der Gracht <robin at protonic.nl>

I believe this regression has already been fixed and accepted by David 
Woodhouse and is awaiting upstream submission - hopefully for the 3.7-rc 
cycle. This should be its ID, in linux-mtd.git (and linux-next):

commit bc86cf7af2ebda88056538e8edff852ee627f76a
mtd: nand: fix Samsung SLC NAND identification regression

http://lists.infradead.org/pipermail/linux-mtd/2012-October/044458.html

Please test this fix to see if it fixes your problem, if possible. BTW, 
I would prefer not to use your solution, as the new Samsung ID decode 
table actually applies to some 2-level (i.e., SLC) Samsung NAND, 
particularly K9FAG08U0M.

Brian