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mtd: nand: Samsung MLC - new OOB sizes

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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 <norris@broadcom.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Brian Norris 2010-08-20 10:50:43 -07:00 committed by David Woodhouse
parent eea116ed04
commit 34c5bf6cc7
1 changed files with 15 additions and 2 deletions
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17
drivers/mtd/nand/nand_base.c
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@ -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) <<