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mtd: spinand: esmt: OTP access for F50{L,D}1G41LB

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Support for OTP area access on ESMT F50L1G41LB and F50D1G41LB chips.

Signed-off-by: Martin Kurbanov <mmkurbanov@salutedevices.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Martin Kurbanov 2025-02-10 17:34:18 +03:00 committed by Miquel Raynal
parent b741d3fa5d
commit a3b219e476
1 changed files with 88 additions and 2 deletions
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90
drivers/mtd/nand/spi/esmt.c
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@ -8,10 +8,15 @@
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/mtd/spinand.h>
#include <linux/spi/spi-mem.h>
/* ESMT uses GigaDevice 0xc8 JECDEC ID on some SPI NANDs */
#define SPINAND_MFR_ESMT_C8 0xc8
#define ESMT_F50L1G41LB_CFG_OTP_PROTECT BIT(7)
#define ESMT_F50L1G41LB_CFG_OTP_LOCK \
(CFG_OTP_ENABLE | ESMT_F50L1G41LB_CFG_OTP_PROTECT)
static SPINAND_OP_VARIANTS(read_cache_variants,
SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
@ -102,6 +107,83 @@ static const struct mtd_ooblayout_ops f50l1g41lb_ooblayout = {
.free = f50l1g41lb_ooblayout_free,
};
static int f50l1g41lb_otp_info(struct spinand_device *spinand, size_t len,
struct otp_info *buf, size_t *retlen, bool user)
{
if (len < sizeof(*buf))
return -EINVAL;
buf->locked = 0;
buf->start = 0;
buf->length = user ? spinand_user_otp_size(spinand) :
spinand_fact_otp_size(spinand);
*retlen = sizeof(*buf);
return 0;
}
static int f50l1g41lb_fact_otp_info(struct spinand_device *spinand, size_t len,
struct otp_info *buf, size_t *retlen)
{
return f50l1g41lb_otp_info(spinand, len, buf, retlen, false);
}
static int f50l1g41lb_user_otp_info(struct spinand_device *spinand, size_t len,
struct otp_info *buf, size_t *retlen)
{
return f50l1g41lb_otp_info(spinand, len, buf, retlen, true);
}
static int f50l1g41lb_otp_lock(struct spinand_device *spinand, loff_t from,
size_t len)
{
struct spi_mem_op write_op = SPINAND_WR_EN_DIS_OP(true);
struct spi_mem_op exec_op = SPINAND_PROG_EXEC_OP(0);
u8 status;
int ret;
ret = spinand_upd_cfg(spinand, ESMT_F50L1G41LB_CFG_OTP_LOCK,
ESMT_F50L1G41LB_CFG_OTP_LOCK);
if (!ret)
return ret;
ret = spi_mem_exec_op(spinand->spimem, &write_op);
if (!ret)
goto out;
ret = spi_mem_exec_op(spinand->spimem, &exec_op);
if (!ret)
goto out;
ret = spinand_wait(spinand,
SPINAND_WRITE_INITIAL_DELAY_US,
SPINAND_WRITE_POLL_DELAY_US,
&status);
if (!ret && (status & STATUS_PROG_FAILED))
ret = -EIO;
out:
if (spinand_upd_cfg(spinand, ESMT_F50L1G41LB_CFG_OTP_LOCK, 0)) {
dev_warn(&spinand_to_mtd(spinand)->dev,
"Can not disable OTP mode\n");
ret = -EIO;
}
return ret;
}
static const struct spinand_user_otp_ops f50l1g41lb_user_otp_ops = {
.info = f50l1g41lb_user_otp_info,
.lock = f50l1g41lb_otp_lock,
.read = spinand_user_otp_read,
.write = spinand_user_otp_write,
};
static const struct spinand_fact_otp_ops f50l1g41lb_fact_otp_ops = {
.info = f50l1g41lb_fact_otp_info,
.read = spinand_fact_otp_read,
};
static const struct spinand_info esmt_c8_spinand_table[] = {
SPINAND_INFO("F50L1G41LB",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x01, 0x7f,
@ -112,7 +194,9 @@ static const struct spinand_info esmt_c8_spinand_table[] = {
&write_cache_variants,
&update_cache_variants),
0,
SPINAND_ECCINFO(&f50l1g41lb_ooblayout, NULL)),
SPINAND_ECCINFO(&f50l1g41lb_ooblayout, NULL),
SPINAND_USER_OTP_INFO(28, 2, &f50l1g41lb_user_otp_ops),
SPINAND_FACT_OTP_INFO(2, 0, &f50l1g41lb_fact_otp_ops)),
SPINAND_INFO("F50D1G41LB",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x11, 0x7f,
0x7f, 0x7f),
@ -122,7 +206,9 @@ static const struct spinand_info esmt_c8_spinand_table[] = {
&write_cache_variants,
&update_cache_variants),
0,
SPINAND_ECCINFO(&f50l1g41lb_ooblayout, NULL)),
SPINAND_ECCINFO(&f50l1g41lb_ooblayout, NULL),
SPINAND_USER_OTP_INFO(28, 2, &f50l1g41lb_user_otp_ops),
SPINAND_FACT_OTP_INFO(2, 0, &f50l1g41lb_fact_otp_ops)),
SPINAND_INFO("F50D2G41KA",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x51, 0x7f,
0x7f, 0x7f),