From: Brian Norris Date: Fri, 20 Aug 2010 17:50:43 +0000 (-0700) Subject: mtd: nand: Samsung MLC - new OOB sizes X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=34c5bf6cc78e56537e0d508f5979f27ea8a64e31;p=openwrt%2Fstaging%2Fblogic.git mtd: nand: Samsung MLC - new OOB sizes There are some additions to the detection scheme used by Samsung MLC NAND. These simple changes to support the 400- and 436-byte OOB are found in the following data sheet: Samsung K9GBG08U0M (p.40) Signed-off-by: Brian Norris Signed-off-by: David Woodhouse --- diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 1ae953c4eccc..596ac848b46d 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2859,7 +2859,7 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, /* * Field definitions are in the following datasheets: * Old style (4,5 byte ID): Samsung K9GAG08U0M (p.32) - * New style (6 byte ID): Samsung K9GAG08U0D (p.40) + * New style (6 byte ID): Samsung K9GBG08U0M (p.40) * * Check for wraparound + Samsung ID + nonzero 6th byte * to decide what to do. @@ -2872,7 +2872,20 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, mtd->writesize = 2048 << (extid & 0x03); extid >>= 2; /* Calc oobsize */ - mtd->oobsize = (extid & 0x03) == 0x01 ? 128 : 218; + switch (extid & 0x03) { + case 1: + mtd->oobsize = 128; + break; + case 2: + mtd->oobsize = 218; + break; + case 3: + mtd->oobsize = 400; + break; + default: + mtd->oobsize = 436; + break; + } extid >>= 2; /* Calc blocksize */ mtd->erasesize = (128 * 1024) <<