Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-16 17:12:06 +00:00
Code Issues Packages Projects Releases Wiki Activity

mtd: nand: decode Hynix MLC, 6-byte ID length

Browse Source 
Hynix has introduced a new ID decoding scheme for their newer MLC, some of
which don't support ONFI. The following devices all follow the pattern given in
the datasheet for Hynix H27UBG8T2B, p.22:

Hynix H27UAG8T2A
Hynix H27UBG8T2A
Hynix H27UBG8T2B

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Brian Norris 2012-09-24 20:40:54 -07:00 committed by David Woodhouse
parent b9e48534d8
commit 73ca392f7d
1 changed files with 44 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
drivers/mtd/nand/nand_base.c
View File

@ -2984,8 +2984,10 @@ 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)
* Hynix MLC (6 byte ID): Hynix H27UBG8T2B (p.22)
*
* Check for ID length + Samsung ID to decide what to do.
* 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)) {
@ -3012,6 +3014,47 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip,
mtd->erasesize = (128 * 1024) <<
(((extid >> 1) & 0x04) | (extid & 0x03));
*busw = 0;
} else if (id_len == 6 && id_data[0] == NAND_MFR_HYNIX &&
(chip->cellinfo & NAND_CI_CELLTYPE_MSK)) {
unsigned int tmp;
/* Calc pagesize */
mtd->writesize = 2048 << (extid & 0x03);
extid >>= 2;
/* Calc oobsize */
switch (((extid >> 2) & 0x04) | (extid & 0x03)) {
case 0:
mtd->oobsize = 128;
break;
case 1:
mtd->oobsize = 224;
break;
case 2:
mtd->oobsize = 448;
break;
case 3:
mtd->oobsize = 64;
break;
case 4:
mtd->oobsize = 32;
break;
case 5:
mtd->oobsize = 16;
break;
default:
mtd->oobsize = 640;
break;
}
extid >>= 2;
/* Calc blocksize */
tmp = ((extid >> 1) & 0x04) | (extid & 0x03);
if (tmp < 0x03)
mtd->erasesize = (128 * 1024) << tmp;
else if (tmp == 0x03)
mtd->erasesize = 768 * 1024;
else
mtd->erasesize = (64 * 1024) << tmp;
*busw = 0;
} else {
/* Calc pagesize */
mtd->writesize = 1024 << (extid & 0x03);