From e2d3a35ee427aaba99b6c68a56609ce276c51270 Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Mon, 24 Sep 2012 20:40:55 -0700 Subject: [PATCH] mtd: nand: detect Samsung K9GBG08U0A, K9GAG08U0F ID Datasheets for the following Samsung NAND parts (both MLC and SLC) describe extensions to the Samsung 6-byte extended ID decoding table: K9GBG08U0A (MLC, 6-byte ID) K9GAG08U0F (MLC, 6-byte ID) K9FAG08U0M (SLC, 6-byte ID) The table found in K9GAG08U0F, p.44, contains a superset of the information found in other previous datasheets. This patch adds support for all of these chips, with 512B and 640B OOB sizes. It also changes the detection pattern such that this table applies to all Samsung 6-byte ID NAND, not just MLC. This is safe, according to the NAND parameter data I have collected: Note that nand_base.c does not yet support the bad block marker scheme defined for these chips (i.e., scan 1st and last page for BB markers). Signed-off-by: Brian Norris Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/nand/nand_base.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 304765140634..ec6841d8e956 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2983,19 +2983,18 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip, /* * Field definitions are in the following datasheets: * Old style (4,5 byte ID): Samsung K9GAG08U0M (p.32) - * New style (6 byte ID): Samsung K9GBG08U0M (p.40) + * New style (6 byte ID): Samsung K9GAG08U0F (p.44) * Hynix MLC (6 byte ID): Hynix H27UBG8T2B (p.22) * * Check for ID length, cell type, and Hynix/Samsung ID to decide what * to do. */ - if (id_len == 6 && id_data[0] == NAND_MFR_SAMSUNG && - (chip->cellinfo & NAND_CI_CELLTYPE_MSK)) { + if (id_len == 6 && id_data[0] == NAND_MFR_SAMSUNG) { /* Calc pagesize */ mtd->writesize = 2048 << (extid & 0x03); extid >>= 2; /* Calc oobsize */ - switch (extid & 0x03) { + switch (((extid >> 2) & 0x04) | (extid & 0x03)) { case 1: mtd->oobsize = 128; break; @@ -3005,9 +3004,16 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip, case 3: mtd->oobsize = 400; break; - default: + case 4: mtd->oobsize = 436; break; + case 5: + mtd->oobsize = 512; + break; + case 6: + default: /* Other cases are "reserved" (unknown) */ + mtd->oobsize = 640; + break; } extid >>= 2; /* Calc blocksize */ -- 2.20.1