Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 34c5bf6c authored by Brian Norris's avatar Brian Norris Committed by David Woodhouse
Browse files

mtd: nand: Samsung MLC - new OOB sizes 



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: default avatarBrian Norris <norris@broadcom.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent eea116ed

drivers/mtd/nand/nand_base.c

+15 −2
Original line number Diff line number Diff line
@@ -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) <<