linux-kernel - [PATCH 2/3] mtd: spinand: winbond: Add support for W35N01JW

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Message-ID: <20250102115110.1402440-3-s-k6@ti.com>
Date: Thu, 2 Jan 2025 17:21:09 +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 2/3] mtd: spinand: winbond: Add support for W35N01JW

Add support for Winbond's W35N01JW OSPI NAND flash of size 1G-bit. [1]

[1] https://www.winbond.com/export/sites/winbond/datasheet/W35N01JW_Datasheet_Brief.pdf

Signed-off-by: Santhosh Kumar K <s-k6@...com>
---
 drivers/mtd/nand/spi/winbond.c | 41 ++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index 7180e615ac97..fbe41e76ad64 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -18,6 +18,7 @@
 #define W25N04KV_STATUS_ECC_5_8_BITFLIPS	(3 << 4)
 
 static SPINAND_OP_VARIANTS(read_cache_variants,
+		SPINAND_PAGE_READ_FROM_CACHE_OCTALIO_OP(0, 16, NULL, 0),
 		SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
 		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
 		SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
@@ -26,10 +27,12 @@ static SPINAND_OP_VARIANTS(read_cache_variants,
 		SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
 
 static SPINAND_OP_VARIANTS(write_cache_variants,
+		SPINAND_PROG_LOAD_OCTALIO(true, 0, NULL, 0),
 		SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
 		SPINAND_PROG_LOAD(true, 0, NULL, 0));
 
 static SPINAND_OP_VARIANTS(update_cache_variants,
+		SPINAND_PROG_LOAD_OCTALIO(false, 0, NULL, 0),
 		SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
 		SPINAND_PROG_LOAD(false, 0, NULL, 0));
 
@@ -112,6 +115,30 @@ static int w25n02kv_ooblayout_free(struct mtd_info *mtd, int section,
 	return 0;
 }
 
+static int w35n01jw_ooblayout_ecc(struct mtd_info *mtd, int section,
+				  struct mtd_oob_region *region)
+{
+	if (section > 7)
+		return -ERANGE;
+
+	region->offset = (16 * section) + 12;
+	region->length = 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 = (16 * section) + 2;
+	region->length = 10;
+
+	return 0;
+}
+
 static const struct mtd_ooblayout_ops w25n01kv_ooblayout = {
 	.ecc = w25n01kv_ooblayout_ecc,
 	.free = w25n02kv_ooblayout_free,
@@ -122,6 +149,11 @@ static const struct mtd_ooblayout_ops w25n02kv_ooblayout = {
 	.free = w25n02kv_ooblayout_free,
 };
 
+static const struct mtd_ooblayout_ops w35n01jw_ooblayout = {
+	.ecc = w35n01jw_ooblayout_ecc,
+	.free = w35n01jw_ooblayout_free,
+};
+
 static int w25n02kv_ecc_get_status(struct spinand_device *spinand,
 				   u8 status)
 {
@@ -208,6 +240,15 @@ static const struct spinand_info winbond_spinand_table[] = {
 					      &update_cache_variants),
 		     0,
 		     SPINAND_ECCINFO(&w25n01kv_ooblayout, w25n02kv_ecc_get_status)),
+	SPINAND_INFO("W35N01JW", /* high-speed 1.8V */
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xdc, 0x21),
+		     NAND_MEMORG(1, 4096, 128, 64, 512, 20, 1, 1, 1),
+		     NAND_ECCREQ(1, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_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),
-- 
2.34.1