[PATCH v3 17/17] mtd: spinand: winbond: Add support for Winbond W35N01JW SPI NAND flash

[Apurva Nandan]

Winbond W35N01JW is a SPI NAND flash supporting Octal DTR SPI protocol.
Add op_variants and ctrl_ops_variants for W35N01JW, thus adding all
required Octal DTR ops. Add W35N01JW's OOB layout functions for the
mtd_ooblayout_ops. Finally, add an entry for W35N01JW in spinand_info
table.

Datasheet: https://www.winbond.com/export/sites/winbond/datasheet/W35N01JW_Datasheet_Brief.pdf

Signed-off-by: Apurva Nandan <a-nandan at ti.com>
---
 drivers/mtd/nand/spi/winbond.c | 71 ++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index 5b943169120e..42fdb578f731 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -42,6 +42,37 @@ static SPINAND_OP_VARIANTS(update_cache_variants_w25xxgv,
 		SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
 		SPINAND_PROG_LOAD(false, 0, NULL, 0));
 
+static SPINAND_OP_VARIANTS(read_cache_variants_w35n01jw,
+		SPINAND_PAGE_READ_FROM_CACHE_OCTALIO_DTR_OP(0, 24, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
+
+static SPINAND_OP_VARIANTS(write_cache_variants_w35n01jw,
+		SPINAND_PROG_LOAD_OCTALIO_DTR(true, 0, NULL, 0),
+		SPINAND_PROG_LOAD(true, 0, NULL, 0));
+
+static SPINAND_OP_VARIANTS(update_cache_variants_w35n01jw,
+		SPINAND_PROG_LOAD_OCTALIO_DTR(false, 0, NULL, 0),
+		SPINAND_PROG_LOAD(false, 0, NULL, 0));
+
+static SPINAND_CTRL_OPS_VARIANTS(ctrl_ops_variants_w35n01jw,
+		SPINAND_CTRL_OPS(SPINAND_8D_8D_8D,
+				 SPINAND_RESET_OP_OCTAL_DTR,
+				 SPINAND_GET_FEATURE_OP_OCTAL_DTR(0, NULL),
+				 SPINAND_SET_FEATURE_OP_OCTAL_DTR(0, NULL),
+				 SPINAND_WR_EN_DIS_OP_OCTAL_DTR(true),
+				 SPINAND_BLK_ERASE_OP_OCTAL_DTR(0),
+				 SPINAND_PAGE_READ_OP_OCTAL_DTR(0),
+				 SPINAND_PROG_EXEC_OP_OCTAL_DTR(0)),
+		SPINAND_CTRL_OPS(SPINAND_1S_1S_1S,
+				 SPINAND_RESET_OP,
+				 SPINAND_GET_FEATURE_OP(0, NULL),
+				 SPINAND_SET_FEATURE_OP(0, NULL),
+				 SPINAND_WR_EN_DIS_OP(true),
+				 SPINAND_BLK_ERASE_OP(0),
+				 SPINAND_PAGE_READ_OP(0),
+				 SPINAND_PROG_EXEC_OP(0)));
+
 static int w25m02gv_ooblayout_ecc(struct mtd_info *mtd, int section,
 				  struct mtd_oob_region *region)
 {
@@ -66,11 +97,40 @@ static int w25m02gv_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 w25m02gv_ooblayout = {
 	.ecc = w25m02gv_ooblayout_ecc,
 	.free = w25m02gv_ooblayout_free,
 };
 
+static const struct mtd_ooblayout_ops w35n01jw_ooblayout = {
+	.ecc = w35n01jw_ooblayout_ecc,
+	.free = w35n01jw_ooblayout_free,
+};
+
 static int w25m02gv_select_target(struct spinand_device *spinand,
 				  unsigned int target)
 {
@@ -105,6 +165,17 @@ static const struct spinand_info winbond_spinand_table[] = {
 					      &update_cache_variants_w25xxgv),
 		     0,
 		     SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)),
+	SPINAND_INFO("W35N01JW",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xdc),
+		     NAND_MEMORG(1, 4096, 128, 64, 512, 20, 1, 1, 1),
+		     NAND_ECCREQ(1, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants_w35n01jw,
+					      &write_cache_variants_w35n01jw,
+					      &update_cache_variants_w35n01jw),
+		     SPINAND_HAS_OCTAL_DTR_BIT | SPINAND_HAS_CR_FEAT_BIT,
+		     SPINAND_ECCINFO(&w35n01jw_ooblayout, NULL),
+		     SPINAND_INFO_CTRL_OPS_VARIANTS(&ctrl_ops_variants_w35n01jw)),
+
 };
 
 static int winbond_spinand_init(struct spinand_device *spinand)
-- 
2.25.1