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Commit 73ca392f authored by Brian Norris's avatar Brian Norris Committed by David Woodhouse
Browse files

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



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: default avatarBrian Norris <computersforpeace@gmail.com>
Signed-off-by: default avatarArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent b9e48534

drivers/mtd/nand/nand_base.c

+44 −1
Original line number Diff line number Diff line
@@ -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);