diff options
| author | Brian Norris <norris@broadcom.com> | 2010-08-19 08:11:02 -0700 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2010-10-24 23:27:11 +0100 |
| commit | 2173bae81e17b710328bc877e7b9ade7f4b90064 (patch) | |
| tree | 7d4faa0e19eebee2343954ea378471be10602abf /drivers | |
| parent | 12c8eb98de747ebc08404e3719c40abb405994e2 (diff) | |
mtd: nand: spansion S30MLxxxP support
Some Spansion chips have a method for determining eraseblock size that
is incompatible with similar ID chips of other sizes. This implements
some heuristic detection of these differences.
This patch checks for a 5-byte ID with trailing zeros as well as a
512-byte page size to ensure that chips are not misdetected as the
S30MLxxxP ORNAND series.
[Tweaked by Artem a bit]
Signed-off-by: Brian Norris <norris@broadcom.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 0fd22cce0ecc..b0f091aca097 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2900,6 +2900,19 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, mtd->writesize = type->pagesize; mtd->oobsize = mtd->writesize / 32; busw = type->options & NAND_BUSWIDTH_16; + + /* + * Check for Spansion/AMD ID + repeating 5th, 6th byte since + * some Spansion chips have erasesize that conflicts with size + * listed in nand_ids table + * Data sheet (5 byte ID): Spansion S30ML-P ORNAND (p.39) + */ + if (*maf_id == NAND_MFR_AMD && id_data[4] != 0x00 && + id_data[5] == 0x00 && id_data[6] == 0x00 && + id_data[7] == 0x00 && mtd->writesize == 512) { + mtd->erasesize = 128 * 1024; + mtd->erasesize <<= ((id_data[3] & 0x03) << 1); + } } /* Try to identify manufacturer */ |