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authorCheng Ming Lin <chengminglin@mxic.com.tw>2024-09-09 17:26:42 +0800
committerMiquel Raynal <miquel.raynal@bootlin.com>2024-09-09 11:52:06 +0200
commitca229bdbef29be207c8666f106acc3bf50736c05 (patch)
tree2398548ac3c8dca7b25a8c157d1bd68b69ea652b
parentd53c35931b95b707df3b6cff061ff975843837d5 (diff)
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mtd: spinand: Add support for setting plane select bits
Add two flags for inserting the Plane Select bit into the column address during the write_to_cache and the read_from_cache operation. Add the SPINAND_HAS_PROG_PLANE_SELECT_BIT flag for serial NAND flash that require inserting the Plane Select bit into the column address during the write_to_cache operation. Add the SPINAND_HAS_READ_PLANE_SELECT_BIT flag for serial NAND flash that require inserting the Plane Select bit into the column address during the read_from_cache operation. Signed-off-by: Cheng Ming Lin <chengminglin@mxic.com.tw> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20240909092643.2434479-2-linchengming884@gmail.com
-rw-r--r--drivers/mtd/nand/spi/core.c6
-rw-r--r--include/linux/mtd/spinand.h2
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index b5c6d755ade1..4d76f9f71a0e 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -408,6 +408,9 @@ static int spinand_read_from_cache_op(struct spinand_device *spinand,
else
rdesc = spinand->dirmaps[req->pos.plane].rdesc_ecc;
+ if (spinand->flags & SPINAND_HAS_READ_PLANE_SELECT_BIT)
+ column |= req->pos.plane << fls(nanddev_page_size(nand));
+
while (nbytes) {
ret = spi_mem_dirmap_read(rdesc, column, nbytes, buf);
if (ret < 0)
@@ -489,6 +492,9 @@ static int spinand_write_to_cache_op(struct spinand_device *spinand,
else
wdesc = spinand->dirmaps[req->pos.plane].wdesc_ecc;
+ if (spinand->flags & SPINAND_HAS_PROG_PLANE_SELECT_BIT)
+ column |= req->pos.plane << fls(nanddev_page_size(nand));
+
while (nbytes) {
ret = spi_mem_dirmap_write(wdesc, column, nbytes, buf);
if (ret < 0)
diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index 8dbf67ca710a..702e5fb13dae 100644
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -312,6 +312,8 @@ struct spinand_ecc_info {
#define SPINAND_HAS_QE_BIT BIT(0)
#define SPINAND_HAS_CR_FEAT_BIT BIT(1)
+#define SPINAND_HAS_PROG_PLANE_SELECT_BIT BIT(2)
+#define SPINAND_HAS_READ_PLANE_SELECT_BIT BIT(3)
/**
* struct spinand_ondie_ecc_conf - private SPI-NAND on-die ECC engine structure