[PATCH v7 6/6] mtd: spinand: micron: Add new Micron SPI NAND devices with multiple dies

shiva.linuxworks
2020-03-11T17:59:06Z

From: Shivamurthy Shastri <sshivamurthy@micron.com>

Add device table for new Micron SPI NAND devices, which have multiple
dies.

Also, enable support to select the dies.

Signed-off-by: Shivamurthy Shastri <sshivamurthy@micron.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
---
drivers/mtd/nand/spi/micron.c | 58 +++++++++++++++++++++++++++++++++++
1 file changed, 58 insertions(+)

diff --git a/drivers/mtd/nand/spi/micron.c b/drivers/mtd/nand/spi/micron.c
index d6fd63008782..5d370cfcdaaa 100644
--- a/drivers/mtd/nand/spi/micron.c
+++ b/drivers/mtd/nand/spi/micron.c
@@ -20,6 +20,14 @@

#define MICRON_CFG_CR BIT(0)

+/*
+ * As per datasheet, die selection is done by the 6th bit of Die
+ * Select Register (Address 0xD0).
+ */
+#define MICRON_DIE_SELECT_REG 0xD0
+
+#define MICRON_SELECT_DIE(x) ((x) << 6)
+
static SPINAND_OP_VARIANTS(read_cache_variants,
SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
@@ -66,6 +74,20 @@ static const struct mtd_ooblayout_ops micron_8_ooblayout = {
.free = micron_8_ooblayout_free,
};

+static int micron_select_target(struct spinand_device *spinand,
+ unsigned int target)
+{
+ struct spi_mem_op op = SPINAND_SET_FEATURE_OP(MICRON_DIE_SELECT_REG,
+ spinand->scratchbuf);
+
+ if (target > 1)
+ return -EINVAL;
+
+ *spinand->scratchbuf = MICRON_SELECT_DIE(target);
+
+ return spi_mem_exec_op(spinand->spimem, &op);
+}
+
static int micron_8_ecc_get_status(struct spinand_device *spinand,
u8 status)
{
@@ -137,6 +159,18 @@ static const struct spinand_info micron_spinand_table[] = {
0,
SPINAND_ECCINFO(&micron_8_ooblayout,
micron_8_ecc_get_status)),
+ /* M79A 4Gb 3.3V */
+ SPINAND_INFO("MT29F4G01ADAGD",
+ SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x36),
+ NAND_MEMORG(1, 2048, 128, 64, 2048, 80, 2, 1, 2),
+ NAND_ECCREQ(8, 512),
+ SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+ &write_cache_variants,
+ &update_cache_variants),
+ 0,
+ SPINAND_ECCINFO(&micron_8_ooblayout,
+ micron_8_ecc_get_status),
+ SPINAND_SELECT_TARGET(micron_select_target)),
/* M70A 4Gb 3.3V */
SPINAND_INFO("MT29F4G01ABAFD",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x34),
@@ -159,6 +193,30 @@ static const struct spinand_info micron_spinand_table[] = {
SPINAND_HAS_CR_FEAT_BIT,
SPINAND_ECCINFO(&micron_8_ooblayout,
micron_8_ecc_get_status)),
+ /* M70A 8Gb 3.3V */
+ SPINAND_INFO("MT29F8G01ADAFD",
+ SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x46),
+ NAND_MEMORG(1, 4096, 256, 64, 2048, 40, 1, 1, 2),
+ NAND_ECCREQ(8, 512),
+ SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+ &write_cache_variants,
+ &update_cache_variants),
+ SPINAND_HAS_CR_FEAT_BIT,
+ SPINAND_ECCINFO(&micron_8_ooblayout,
+ micron_8_ecc_get_status),
+ SPINAND_SELECT_TARGET(micron_select_target)),
+ /* M70A 8Gb 1.8V */
+ SPINAND_INFO("MT29F8G01ADBFD",
+ SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x47),
+ NAND_MEMORG(1, 4096, 256, 64, 2048, 40, 1, 1, 2),
+ NAND_ECCREQ(8, 512),
+ SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+ &write_cache_variants,
+ &update_cache_variants),
+ SPINAND_HAS_CR_FEAT_BIT,
+ SPINAND_ECCINFO(&micron_8_ooblayout,
+ micron_8_ecc_get_status),
+ SPINAND_SELECT_TARGET(micron_select_target)),
};

static int micron_spinand_init(struct spinand_device *spinand)
--
2.17.1