[PATCH v2 14/14] mtd: spinand: winbond: Add support for Winbond W35N01JW SPI NAND flash

Apurva Nandan
2021-10-11T21:40:51Z

Winbond W35N01JW is a SPI NAND flash supporting Octal DTR SPI protocol.
Add op_variants for W35N01JW, which include the Octal DTR read/write
page ops as well. 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@ti.com>
---
drivers/mtd/nand/spi/winbond.c | 53 ++++++++++++++++++++++++++++++++++
1 file changed, 53 insertions(+)

diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index 1857836f19d0..8f687b6a6697 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -47,6 +47,19 @@ 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 int w25m02gv_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
@@ -71,11 +84,40 @@ 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)
{
@@ -110,6 +152,17 @@ 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_POR_CMD_BIT |
+ SPINAND_HAS_CR_FEAT_BIT,
+ SPINAND_ECCINFO(&w35n01jw_ooblayout, NULL)),
+
};

static int winbond_spinand_init(struct spinand_device *spinand)
--
2.25.1