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mtd: spinand: add support for FudanMicro FM25S01BI3 

Add support for FudanMicro FM25S01BI3 SPI NAND.

Link: https://www.fmsh.com/nvm/FM25S01BI3_ds_eng.pdf

Signed-off-by: Mikhail Zhilkin <csharper2005@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Mikhail Zhilkin 2025-11-27 22:59:00 +03:00 committed by Miquel Raynal
parent a3623e1ae1
commit f6dffe2a9e
1 changed files with 72 additions and 0 deletions
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72
drivers/mtd/nand/spi/fmsh.c
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@ -9,6 +9,13 @@
#include <linux/kernel.h>
#include <linux/mtd/spinand.h>
#define FM25S01BI3_STATUS_ECC_MASK (7 << 4)
#define FM25S01BI3_STATUS_ECC_NO_BITFLIPS (0 << 4)
#define FM25S01BI3_STATUS_ECC_1_3_BITFLIPS (1 << 4)
#define FM25S01BI3_STATUS_ECC_UNCOR_ERROR (2 << 4)
#define FM25S01BI3_STATUS_ECC_4_6_BITFLIPS (3 << 4)
#define FM25S01BI3_STATUS_ECC_7_8_BITFLIPS (5 << 4)
#define SPINAND_MFR_FMSH 0xA1
static SPINAND_OP_VARIANTS(read_cache_variants,
@ -45,11 +52,66 @@ static int fm25s01a_ooblayout_free(struct mtd_info *mtd, int section,
return 0;
}
static int fm25s01bi3_ecc_get_status(struct spinand_device *spinand,
u8 status)
{
switch (status & FM25S01BI3_STATUS_ECC_MASK) {
case FM25S01BI3_STATUS_ECC_NO_BITFLIPS:
return 0;
case FM25S01BI3_STATUS_ECC_UNCOR_ERROR:
return -EBADMSG;
case FM25S01BI3_STATUS_ECC_1_3_BITFLIPS:
return 3;
case FM25S01BI3_STATUS_ECC_4_6_BITFLIPS:
return 6;
case FM25S01BI3_STATUS_ECC_7_8_BITFLIPS:
return 8;
default:
break;
}
return -EINVAL;
}
static int fm25s01bi3_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section)
return -ERANGE;
region->offset = 64;
region->length = 64;
return 0;
}
static int fm25s01bi3_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section > 3)
return -ERANGE;
region->offset = (16 * section) + 4;
region->length = 12;
return 0;
}
static const struct mtd_ooblayout_ops fm25s01a_ooblayout = {
.ecc = fm25s01a_ooblayout_ecc,
.free = fm25s01a_ooblayout_free,
};
static const struct mtd_ooblayout_ops fm25s01bi3_ooblayout = {
.ecc = fm25s01bi3_ooblayout_ecc,
.free = fm25s01bi3_ooblayout_free,
};
static const struct spinand_info fmsh_spinand_table[] = {
SPINAND_INFO("FM25S01A",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xE4),
@ -60,6 +122,16 @@ static const struct spinand_info fmsh_spinand_table[] = {
&update_cache_variants),
SPINAND_HAS_QE_BIT,
SPINAND_ECCINFO(&fm25s01a_ooblayout, NULL)),
SPINAND_INFO("FM25S01BI3",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xd4),
NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
NAND_ECCREQ(8, 512),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
SPINAND_HAS_QE_BIT,
SPINAND_ECCINFO(&fm25s01bi3_ooblayout,
fm25s01bi3_ecc_get_status)),
};
static const struct spinand_manufacturer_ops fmsh_spinand_manuf_ops = {