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| author | Miquel Raynal <miquel.raynal@bootlin.com> | 2026-04-10 19:41:03 +0200 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2026-04-27 15:08:04 +0200 |
| commit | 5e25407b68f460142539536e31fa20338db6146f (patch) | |
| tree | 6173fede5a77e239e9150e56f8c35c055456f690 /drivers | |
| parent | e47029b977e747cb3a9174308fd55762cce70147 (diff) | |
| download | linux-5e25407b68f460142539536e31fa20338db6146f.tar.gz linux-5e25407b68f460142539536e31fa20338db6146f.zip | |
mtd: spinand: Add support for packed read data ODTR commands
Some devices stuff address bits in the double byte opcode (in place of
the repeated byte) in order to be able to increase the size of the
devices, without adding extra address bytes.
Create a flag to identify those devices. When the flag is set, use the
"packed" variant for the read data operation.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/spi/core.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c index 8aa3753aaaa1..0b076790bd9d 100644 --- a/drivers/mtd/nand/spi/core.c +++ b/drivers/mtd/nand/spi/core.c @@ -100,6 +100,17 @@ spinand_fill_page_read_op(struct spinand_device *spinand, u64 addr) return op; } +static struct spi_mem_op +spinand_fill_page_read_packed_op(struct spinand_device *spinand, u64 addr) +{ + struct spi_mem_op op = spinand->op_templates->page_read; + + op.cmd.opcode |= addr >> 16; + op.addr.val = addr & 0xFFFF; + + return op; +} + struct spi_mem_op spinand_fill_prog_exec_op(struct spinand_device *spinand, u64 addr) { @@ -453,7 +464,10 @@ static int spinand_load_page_op(struct spinand_device *spinand, { struct nand_device *nand = spinand_to_nand(spinand); unsigned int row = nanddev_pos_to_row(nand, &req->pos); - struct spi_mem_op op = SPINAND_OP(spinand, page_read, row); + bool packed = spinand->flags & SPINAND_ODTR_PACKED_PAGE_READ; + struct spi_mem_op op = packed ? + SPINAND_OP(spinand, page_read_packed, row) : + SPINAND_OP(spinand, page_read, row); return spi_mem_exec_op(spinand->spimem, &op); } @@ -1489,9 +1503,13 @@ static int spinand_init_odtr_instruction_set(struct spinand_device *spinand) if (!spi_mem_supports_op(spinand->spimem, &tmpl->blk_erase)) return -EOPNOTSUPP; - tmpl->page_read = (struct spi_mem_op)SPINAND_PAGE_READ_8D_8D_0_OP(0); - if (!spi_mem_supports_op(spinand->spimem, &tmpl->page_read)) + if (spinand->flags & SPINAND_ODTR_PACKED_PAGE_READ) + tmpl->page_read = (struct spi_mem_op)SPINAND_PAGE_READ_PACKED_8D_8D_0_OP(0); + else + tmpl->page_read = (struct spi_mem_op)SPINAND_PAGE_READ_8D_8D_0_OP(0); + if (!spi_mem_supports_op(spinand->spimem, &tmpl->page_read)) { return -EOPNOTSUPP; + } tmpl->prog_exec = (struct spi_mem_op)SPINAND_PROG_EXEC_8D_8D_0_OP(0); if (!spi_mem_supports_op(spinand->spimem, &tmpl->prog_exec)) |