diff options
Diffstat (limited to 'drivers/mtd/nand/spi/micron.c')
| -rw-r--r-- | drivers/mtd/nand/spi/micron.c | 143 |
1 files changed, 138 insertions, 5 deletions
diff --git a/drivers/mtd/nand/spi/micron.c b/drivers/mtd/nand/spi/micron.c index 12601bc4227a..691f8a2e0791 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 @@ -28,13 +30,17 @@ #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_FAST_OP(0, 1, NULL, 0), + SPINAND_PAGE_READ_FROM_CACHE_OP(0, 1, NULL, 0)); static SPINAND_OP_VARIANTS(x4_write_cache_variants, SPINAND_PROG_LOAD_X4(true, 0, NULL, 0), @@ -48,8 +54,8 @@ static SPINAND_OP_VARIANTS(x4_update_cache_variants, 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_FAST_OP(0, 1, NULL, 0), + SPINAND_PAGE_READ_FROM_CACHE_OP(0, 1, NULL, 0)); static SPINAND_OP_VARIANTS(x1_write_cache_variants, SPINAND_PROG_LOAD(true, 0, NULL, 0)); @@ -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_OP(true); + struct spi_mem_op exec_op = SPINAND_PROG_EXEC_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(µn_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), |