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path: root/drivers/mtd/nand/spi/micron.c
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Diffstat (limited to 'drivers/mtd/nand/spi/micron.c')
-rw-r--r--drivers/mtd/nand/spi/micron.c169
1 files changed, 151 insertions, 18 deletions
diff --git a/drivers/mtd/nand/spi/micron.c b/drivers/mtd/nand/spi/micron.c
index 12601bc4227a..8281c9d3f4f7 100644
--- a/drivers/mtd/nand/spi/micron.c
+++ b/drivers/mtd/nand/spi/micron.c
@@ -9,6 +9,8 @@
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/mtd/spinand.h>
+#include <linux/spi/spi-mem.h>
+#include <linux/string.h>
#define SPINAND_MFR_MICRON 0x2c
@@ -28,34 +30,38 @@
#define MICRON_SELECT_DIE(x) ((x) << 6)
+#define MICRON_MT29F2G01ABAGD_CFG_OTP_STATE BIT(7)
+#define MICRON_MT29F2G01ABAGD_CFG_OTP_LOCK \
+ (CFG_OTP_ENABLE | MICRON_MT29F2G01ABAGD_CFG_OTP_STATE)
+
static SPINAND_OP_VARIANTS(quadio_read_cache_variants,
- SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
- SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
- SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
- SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
- SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
- SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
+ SPINAND_PAGE_READ_FROM_CACHE_1S_4S_4S_OP(0, 2, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_OP(0, 1, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_1S_2S_2S_OP(0, 1, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_1S_1S_2S_OP(0, 1, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_FAST_1S_1S_1S_OP(0, 1, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_1S_1S_1S_OP(0, 1, NULL, 0));
static SPINAND_OP_VARIANTS(x4_write_cache_variants,
- SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
- SPINAND_PROG_LOAD(true, 0, NULL, 0));
+ SPINAND_PROG_LOAD_1S_1S_4S_OP(true, 0, NULL, 0),
+ SPINAND_PROG_LOAD_1S_1S_1S_OP(true, 0, NULL, 0));
static SPINAND_OP_VARIANTS(x4_update_cache_variants,
- SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
- SPINAND_PROG_LOAD(false, 0, NULL, 0));
+ SPINAND_PROG_LOAD_1S_1S_4S_OP(false, 0, NULL, 0),
+ SPINAND_PROG_LOAD_1S_1S_1S_OP(false, 0, NULL, 0));
/* Micron MT29F2G01AAAED Device */
static SPINAND_OP_VARIANTS(x4_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),
- SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
- SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
+ SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_OP(0, 1, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_1S_1S_2S_OP(0, 1, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_FAST_1S_1S_1S_OP(0, 1, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_1S_1S_1S_OP(0, 1, NULL, 0));
static SPINAND_OP_VARIANTS(x1_write_cache_variants,
- SPINAND_PROG_LOAD(true, 0, NULL, 0));
+ SPINAND_PROG_LOAD_1S_1S_1S_OP(true, 0, NULL, 0));
static SPINAND_OP_VARIANTS(x1_update_cache_variants,
- SPINAND_PROG_LOAD(false, 0, NULL, 0));
+ SPINAND_PROG_LOAD_1S_1S_1S_OP(false, 0, NULL, 0));
static int micron_8_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
@@ -131,7 +137,7 @@ static const struct mtd_ooblayout_ops micron_4_ooblayout = {
static int micron_select_target(struct spinand_device *spinand,
unsigned int target)
{
- struct spi_mem_op op = SPINAND_SET_FEATURE_OP(MICRON_DIE_SELECT_REG,
+ struct spi_mem_op op = SPINAND_SET_FEATURE_1S_1S_1S_OP(MICRON_DIE_SELECT_REG,
spinand->scratchbuf);
if (target > 1)
@@ -168,6 +174,131 @@ static int micron_8_ecc_get_status(struct spinand_device *spinand,
return -EINVAL;
}
+static int mt29f2g01abagd_otp_is_locked(struct spinand_device *spinand)
+{
+ size_t bufsize = spinand_otp_page_size(spinand);
+ size_t retlen;
+ u8 *buf;
+ int ret;
+
+ buf = kmalloc(bufsize, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ ret = spinand_upd_cfg(spinand,
+ MICRON_MT29F2G01ABAGD_CFG_OTP_LOCK,
+ MICRON_MT29F2G01ABAGD_CFG_OTP_STATE);
+ if (ret)
+ goto free_buf;
+
+ ret = spinand_user_otp_read(spinand, 0, bufsize, &retlen, buf);
+
+ if (spinand_upd_cfg(spinand, MICRON_MT29F2G01ABAGD_CFG_OTP_LOCK,
+ 0)) {
+ dev_warn(&spinand_to_mtd(spinand)->dev,
+ "Can not disable OTP mode\n");
+ ret = -EIO;
+ }
+
+ if (ret)
+ goto free_buf;
+
+ /* If all zeros, then the OTP area is locked. */
+ if (mem_is_zero(buf, bufsize))
+ ret = 1;
+
+free_buf:
+ kfree(buf);
+ return ret;
+}
+
+static int mt29f2g01abagd_otp_info(struct spinand_device *spinand, size_t len,
+ struct otp_info *buf, size_t *retlen,
+ bool user)
+{
+ int locked;
+
+ if (len < sizeof(*buf))
+ return -EINVAL;
+
+ locked = mt29f2g01abagd_otp_is_locked(spinand);
+ if (locked < 0)
+ return locked;
+
+ buf->locked = locked;
+ buf->start = 0;
+ buf->length = user ? spinand_user_otp_size(spinand) :
+ spinand_fact_otp_size(spinand);
+
+ *retlen = sizeof(*buf);
+ return 0;
+}
+
+static int mt29f2g01abagd_fact_otp_info(struct spinand_device *spinand,
+ size_t len, struct otp_info *buf,
+ size_t *retlen)
+{
+ return mt29f2g01abagd_otp_info(spinand, len, buf, retlen, false);
+}
+
+static int mt29f2g01abagd_user_otp_info(struct spinand_device *spinand,
+ size_t len, struct otp_info *buf,
+ size_t *retlen)
+{
+ return mt29f2g01abagd_otp_info(spinand, len, buf, retlen, true);
+}
+
+static int mt29f2g01abagd_otp_lock(struct spinand_device *spinand, loff_t from,
+ size_t len)
+{
+ struct spi_mem_op write_op = SPINAND_WR_EN_DIS_1S_0_0_OP(true);
+ struct spi_mem_op exec_op = SPINAND_PROG_EXEC_1S_1S_0_OP(0);
+ u8 status;
+ int ret;
+
+ ret = spinand_upd_cfg(spinand,
+ MICRON_MT29F2G01ABAGD_CFG_OTP_LOCK,
+ MICRON_MT29F2G01ABAGD_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, MICRON_MT29F2G01ABAGD_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 mt29f2g01abagd_user_otp_ops = {
+ .info = mt29f2g01abagd_user_otp_info,
+ .lock = mt29f2g01abagd_otp_lock,
+ .read = spinand_user_otp_read,
+ .write = spinand_user_otp_write,
+};
+
+static const struct spinand_fact_otp_ops mt29f2g01abagd_fact_otp_ops = {
+ .info = mt29f2g01abagd_fact_otp_info,
+ .read = spinand_fact_otp_read,
+};
+
static const struct spinand_info micron_spinand_table[] = {
/* M79A 2Gb 3.3V */
SPINAND_INFO("MT29F2G01ABAGD",
@@ -179,7 +310,9 @@ static const struct spinand_info micron_spinand_table[] = {
&x4_update_cache_variants),
0,
SPINAND_ECCINFO(&micron_8_ooblayout,
- micron_8_ecc_get_status)),
+ micron_8_ecc_get_status),
+ SPINAND_USER_OTP_INFO(12, 2, &mt29f2g01abagd_user_otp_ops),
+ SPINAND_FACT_OTP_INFO(2, 0, &mt29f2g01abagd_fact_otp_ops)),
/* M79A 2Gb 1.8V */
SPINAND_INFO("MT29F2G01ABBGD",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x25),
generated by cgit (git 2.34.1) at 2025-07-23 20:27:44 +0000