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From: Miquel Raynal <miquel.raynal@bootlin.com>
Date: Thu, 03 Apr 2025 11:19:27 +0200
Subject: [PATCH v2 17/19] mtd: spinand: winbond: Add support for W35N01JW
 in single mode
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Message-Id: <20250403-winbond-6-14-rc1-octal-v2-17-7846bd88fe83@bootlin.com>
References: <20250403-winbond-6-14-rc1-octal-v2-0-7846bd88fe83@bootlin.com>
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To: Richard Weinberger <richard@nod.at>,
 Vignesh Raghavendra <vigneshr@ti.com>, Santhosh Kumar K <s-k6@ti.com>
Cc: Tudor Ambarus <tudor.ambarus@linaro.org>,
 Pratyush Yadav <pratyush@kernel.org>, Michael Walle <michael@walle.cc>,
 Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
 Steam Lin <stlin2@winbond.com>, linux-mtd@lists.infradead.org,
 linux-kernel@vger.kernel.org, Miquel Raynal <miquel.raynal@bootlin.com>
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Add support for the W35N series by describing the smaller (single die)
chip. It has 1b/512B ECC support and its own OOB layout.

Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/mtd/nand/spi/winbond.c | 54 ++++++++++++++++++++++++++++++++++++++=
++++
 1 file changed, 54 insertions(+)

diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index 99b9f333eb3142999d8f73d43537f1ed9789c975..9b0369a077efadac8bd6be632f1=
5b822d42a7227 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -23,6 +23,16 @@
  * "X4" in the core is equivalent to "quad output" in the datasheets.
  */
=20
+static SPINAND_OP_VARIANTS(read_cache_octal_variants,
+		SPINAND_PAGE_READ_FROM_CACHE_FAST_1S_1S_1S_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_1S_OP(0, 1, NULL, 0));
+
+static SPINAND_OP_VARIANTS(write_cache_octal_variants,
+		SPINAND_PROG_LOAD_1S_1S_1S_OP(true, 0, NULL, 0));
+
+static SPINAND_OP_VARIANTS(update_cache_octal_variants,
+		SPINAND_PROG_LOAD_1S_1S_1S_OP(false, 0, NULL, 0));
+
 static SPINAND_OP_VARIANTS(read_cache_dual_quad_dtr_variants,
 		SPINAND_PAGE_READ_FROM_CACHE_1S_4D_4D_OP(0, 8, NULL, 0, 80 * HZ_PER_MHZ),
 		SPINAND_PAGE_READ_FROM_CACHE_1S_1D_4D_OP(0, 2, NULL, 0, 80 * HZ_PER_MHZ),
@@ -141,6 +151,41 @@ static const struct mtd_ooblayout_ops w25n02kv_ooblayo=
ut =3D {
 	.free =3D w25n02kv_ooblayout_free,
 };
=20
+static int w35n01jw_ooblayout_ecc(struct mtd_info *mtd, int section,
+				  struct mtd_oob_region *region)
+{
+	if (section > 7)
+		return -ERANGE;
+
+	region->offset =3D (16 * section) + 12;
+	region->length =3D 4;
+
+	return 0;
+}
+
+static int w35n01jw_ooblayout_free(struct mtd_info *mtd, int section,
+				   struct mtd_oob_region *region)
+{
+	if (section > 7)
+		return -ERANGE;
+
+	region->offset =3D 16 * section;
+	region->length =3D 12;
+
+	/* Extract BBM */
+	if (!section) {
+		region->offset +=3D 2;
+		region->length -=3D 2;
+	}
+
+	return 0;
+}
+
+static const struct mtd_ooblayout_ops w35n01jw_ooblayout =3D {
+	.ecc =3D w35n01jw_ooblayout_ecc,
+	.free =3D w35n01jw_ooblayout_free,
+};
+
 static int w25n02kv_ecc_get_status(struct spinand_device *spinand,
 				   u8 status)
 {
@@ -227,6 +272,15 @@ static const struct spinand_info winbond_spinand_table=
[] =3D {
 					      &update_cache_variants),
 		     0,
 		     SPINAND_ECCINFO(&w25n01kv_ooblayout, w25n02kv_ecc_get_status)),
+	SPINAND_INFO("W35N01JW", /* 1.8V */
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xdc, 0x21),
+		     NAND_MEMORG(1, 4096, 128, 64, 512, 10, 1, 1, 1),
+		     NAND_ECCREQ(1, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_octal_variants,
+					      &write_cache_octal_variants,
+					      &update_cache_octal_variants),
+		     0,
+		     SPINAND_ECCINFO(&w35n01jw_ooblayout, NULL)),
 	/* 2G-bit densities */
 	SPINAND_INFO("W25M02GV", /* 2x1G-bit 3.3V */
 		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xab, 0x21),

--=20
2.48.1