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From: Ladislav Michl <ladis@linux-mips.org>
To: barebox@lists.infradead.org
Subject: [PATCH 16/16] mtd: nand: detect OOB size for Toshiba 24nm raw SLC
Date: Sun, 28 Oct 2018 22:27:38 +0100	[thread overview]
Message-ID: <20181028212738.GQ14788@lenoch> (raw)
In-Reply-To: <20181028211947.GA14788@lenoch>

Linux commit 60c673824561.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
---
 drivers/mtd/nand/nand_base.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 9b2d3f1cf..e290081bb 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3219,6 +3219,20 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip,
 		extid >>= 2;
 		/* Get buswidth information */
 		*busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0;
+		/*
+		 * Toshiba 24nm raw SLC (i.e., not BENAND) have 32B OOB per
+		 * 512B page. For Toshiba SLC, we decode the 5th/6th byte as
+		 * follows:
+		 * - ID byte 6, bits[2:0]: 100b -> 43nm, 101b -> 32nm,
+		 *                         110b -> 24nm
+		 * - ID byte 5, bit[7]:    1 -> BENAND, 0 -> raw SLC
+		 */
+		if (id_len >= 6 && id_data[0] == NAND_MFR_TOSHIBA &&
+				nand_is_slc(chip) &&
+				(id_data[5] & 0x7) == 0x6 /* 24nm */ &&
+				!(id_data[4] & 0x80) /* !BENAND */) {
+			mtd->oobsize = 32 * mtd->writesize >> 9;
+		}
 	}
 }
 
-- 
2.19.1


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      parent reply	other threads:[~2018-10-28 21:27 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-28 21:19 [PATCH 00/16] NAND update (1st step) Ladislav Michl
2018-10-28 21:21 ` [PATCH 01/16] mtd: nand: refactor chip->block_markbad interface Ladislav Michl
2018-10-28 21:21 ` [PATCH 02/16] mtd: nand: remove multiplied-by-2 block logic Ladislav Michl
2018-10-28 21:22 ` [PATCH 03/16] mtd: nand: hide in-memory BBT implementation details Ladislav Michl
2018-10-29 10:07   ` Ladislav Michl
2018-10-29 11:43     ` Ladislav Michl
2018-10-30  9:07       ` Sascha Hauer
2018-10-28 21:22 ` [PATCH 04/16] mtd: nand: remove NAND_BBT_SCANEMPTY Ladislav Michl
2018-10-28 21:22 ` [PATCH 05/16] mtd: nand: Request strength instead of bytes for soft BCH Ladislav Michl
2018-10-28 21:23 ` [PATCH 06/16] mtd: atmel_nand: Add per board ECC setup Ladislav Michl
2018-10-28 21:23 ` [PATCH 07/16] mtd: nand: simplify nand_bch_init() usage Ladislav Michl
2018-10-28 21:24 ` [PATCH 08/16] mtd: nand_bbt: kill NAND_BBT_SCANALLPAGES Ladislav Michl
2018-10-28 21:24 ` [PATCH 09/16] mtd: nand_bbt: handle error case for nand_create_badblock_pattern() Ladislav Michl
2018-10-28 21:25 ` [PATCH 10/16] mtd: nand_bbt: make nand_scan_bbt() static Ladislav Michl
2018-10-28 21:25 ` [PATCH 11/16] mtd: nand_bbt: unify/fix error handling in nand_scan_bbt() Ladislav Michl
2018-10-28 21:25 ` [PATCH 12/16] mtd: nand_bbt: Move BBT block selection logic out of write_bbt() Ladislav Michl
2018-10-28 21:26 ` [PATCH 13/16] mtd: nand_bbt: scan for next free bbt block if writing bbt fails Ladislav Michl
2018-10-28 21:26 ` [PATCH 14/16] mtd: nand: Kill the chip->scan_bbt() hook Ladislav Michl
2019-01-21  8:32   ` Sascha Hauer
2018-10-28 21:27 ` [PATCH 15/16] mtd: nand: Kill cellinfo Ladislav Michl
2018-10-28 21:27 ` Ladislav Michl [this message]

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