linux-kernel - [PATCH 3/3] mtd: spinand: winbond: Fix oob

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Message-ID: <20250102115110.1402440-4-s-k6@ti.com>
Date: Thu, 2 Jan 2025 17:21:10 +0530
From: Santhosh Kumar K <s-k6@...com>
To: <miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>,
        <quic_sridsn@...cinc.com>, <quic_mdalam@...cinc.com>
CC: <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <p-mantena@...com>, <s-k6@...com>
Subject: [PATCH 3/3] mtd: spinand: winbond: Fix oob_layout for W25N01JW

Fix the W25N01JW's oob_layout according to the datasheet. [1]

[1] https://www.winbond.com/hq/product/code-storage-flash-memory/qspinand-flash/?__locale=en&partNo=W25N01JW

Fixes: 6a804fb72de5 ("mtd: spinand: winbond: add support for serial NAND flash")
CC: Sridharan S N <quic_sridsn@...cinc.com>
Signed-off-by: Santhosh Kumar K <s-k6@...com>
---

Hi, Sridharan,

Do you have a different revision of W25N01JW with a different oob_layout?
If yes, can you please provide the datasheet of that?

Regards,
Santhosh.

 drivers/mtd/nand/spi/winbond.c | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index fbe41e76ad64..de05b3e2b9df 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -115,6 +115,30 @@ static int w25n02kv_ooblayout_free(struct mtd_info *mtd, int section,
 	return 0;
 }
 
+static int w25n01jw_ooblayout_ecc(struct mtd_info *mtd, int section,
+				  struct mtd_oob_region *region)
+{
+	if (section > 3)
+		return -ERANGE;
+
+	region->offset = (16 * section) + 12;
+	region->length = 4;
+
+	return 0;
+}
+
+static int w25n01jw_ooblayout_free(struct mtd_info *mtd, int section,
+				   struct mtd_oob_region *region)
+{
+	if (section > 3)
+		return -ERANGE;
+
+	region->offset = (16 * section) + 2;
+	region->length = 10;
+
+	return 0;
+}
+
 static int w35n01jw_ooblayout_ecc(struct mtd_info *mtd, int section,
 				  struct mtd_oob_region *region)
 {
@@ -154,6 +178,11 @@ static const struct mtd_ooblayout_ops w35n01jw_ooblayout = {
 	.free = w35n01jw_ooblayout_free,
 };
 
+static const struct mtd_ooblayout_ops w25n01jw_ooblayout = {
+	.ecc = w25n01jw_ooblayout_ecc,
+	.free = w25n01jw_ooblayout_free,
+};
+
 static int w25n02kv_ecc_get_status(struct spinand_device *spinand,
 				   u8 status)
 {
@@ -230,7 +259,7 @@ static const struct spinand_info winbond_spinand_table[] = {
 					      &write_cache_variants,
 					      &update_cache_variants),
 		     0,
-		     SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)),
+		     SPINAND_ECCINFO(&w25n01jw_ooblayout, NULL)),
 	SPINAND_INFO("W25N01KV", /* 3.3V */
 		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xae, 0x21),
 		     NAND_MEMORG(1, 2048, 96, 64, 1024, 20, 1, 1, 1),
-- 
2.34.1