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mtd: spinand: Add support for setting plane select bits

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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
This commit is contained in:
Cheng Ming Lin 2024-09-09 17:26:42 +08:00 committed by Miquel Raynal
parent d53c35931b
commit ca229bdbef
2 changed files with 8 additions and 0 deletions
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6
drivers/mtd/nand/spi/core.c
View File

@ -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)

2
include/linux/mtd/spinand.h
View File

@ -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