diff options
Diffstat (limited to 'drivers/mtd/chips')
| -rw-r--r-- | drivers/mtd/chips/cfi_cmdset_0002.c | 89 |
1 files changed, 84 insertions, 5 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c index 6c575e6..bf313be6 100644 --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -69,6 +69,7 @@ static int cfi_amdstd_read_user_prot_reg(struct mtd_info *, loff_t, size_t, size_t *, u_char *); static int cfi_amdstd_write_user_prot_reg(struct mtd_info *, loff_t, size_t, size_t *, u_char *); +static int cfi_amdstd_lock_user_prot_reg(struct mtd_info *, loff_t, size_t); static int cfi_amdstd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf); @@ -533,6 +534,7 @@ struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary) mtd->_get_fact_prot_info = cfi_amdstd_get_fact_prot_info; mtd->_get_user_prot_info = cfi_amdstd_get_user_prot_info; mtd->_write_user_prot_reg = cfi_amdstd_write_user_prot_reg; + mtd->_lock_user_prot_reg = cfi_amdstd_lock_user_prot_reg; mtd->flags = MTD_CAP_NORFLASH; mtd->name = map->name; mtd->writesize = 1; @@ -1153,7 +1155,7 @@ static int cfi_amdstd_read (struct mtd_info *mtd, loff_t from, size_t len, size_ } typedef int (*otp_op_t)(struct map_info *map, struct flchip *chip, - loff_t adr, size_t len, u_char *buf); + loff_t adr, size_t len, u_char *buf, size_t grouplen); static inline void otp_enter(struct map_info *map, struct flchip *chip, loff_t adr, size_t len) @@ -1187,7 +1189,10 @@ static inline void otp_exit(struct map_info *map, struct flchip *chip, INVALIDATE_CACHED_RANGE(map, chip->start + adr, len); } -static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) +static inline int do_read_secsi_onechip(struct map_info *map, + struct flchip *chip, loff_t adr, + size_t len, u_char *buf, + size_t grouplen) { DECLARE_WAITQUEUE(wait, current); unsigned long timeo = jiffies + HZ; @@ -1246,7 +1251,8 @@ static int cfi_amdstd_secsi_read (struct mtd_info *mtd, loff_t from, size_t len, else thislen = len; - ret = do_read_secsi_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); + ret = do_read_secsi_onechip(map, &cfi->chips[chipnum], ofs, + thislen, buf, 0); if (ret) break; @@ -1265,7 +1271,7 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, int mode); static int do_otp_write(struct map_info *map, struct flchip *chip, loff_t adr, - size_t len, u_char *buf) + size_t len, u_char *buf, size_t grouplen) { int ret; while (len) { @@ -1294,6 +1300,70 @@ static int do_otp_write(struct map_info *map, struct flchip *chip, loff_t adr, return 0; } +static int do_otp_lock(struct map_info *map, struct flchip *chip, loff_t adr, + size_t len, u_char *buf, size_t grouplen) +{ + struct cfi_private *cfi = map->fldrv_priv; + uint8_t lockreg; + unsigned long timeo; + int ret; + + /* make sure area matches group boundaries */ + if ((adr != 0) || (len != grouplen)) + return -EINVAL; + + mutex_lock(&chip->mutex); + ret = get_chip(map, chip, chip->start, FL_LOCKING); + if (ret) { + mutex_unlock(&chip->mutex); + return ret; + } + chip->state = FL_LOCKING; + + /* Enter lock register command */ + cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, + cfi->device_type, NULL); + cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, + cfi->device_type, NULL); + cfi_send_gen_cmd(0x40, cfi->addr_unlock1, chip->start, map, cfi, + cfi->device_type, NULL); + + /* read lock register */ + lockreg = cfi_read_query(map, 0); + + /* set bit 0 to protect extended memory block */ + lockreg &= ~0x01; + + /* set bit 0 to protect extended memory block */ + /* write lock register */ + map_write(map, CMD(0xA0), chip->start); + map_write(map, CMD(lockreg), chip->start); + + /* wait for chip to become ready */ + timeo = jiffies + msecs_to_jiffies(2); + for (;;) { + if (chip_ready(map, adr)) + break; + + if (time_after(jiffies, timeo)) { + pr_err("Waiting for chip to be ready timed out.\n"); + ret = -EIO; + break; + } + UDELAY(map, chip, 0, 1); + } + + /* exit protection commands */ + map_write(map, CMD(0x90), chip->start); + map_write(map, CMD(0x00), chip->start); + + chip->state = FL_READY; + put_chip(map, chip, chip->start); + mutex_unlock(&chip->mutex); + + return ret; +} + static int cfi_amdstd_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf, otp_op_t action, int user_regs) @@ -1392,7 +1462,8 @@ static int cfi_amdstd_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, } else if ((from < otpsize) && (len > 0)) { size_t size; size = (len < otpsize - from) ? len : otpsize - from; - ret = action(map, chip, otpoffset + from, size, buf); + ret = action(map, chip, otpoffset + from, size, buf, + otpsize); if (ret < 0) return ret; @@ -1445,6 +1516,14 @@ static int cfi_amdstd_write_user_prot_reg(struct mtd_info *mtd, loff_t from, do_otp_write, 1); } +static int cfi_amdstd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, + size_t len) +{ + size_t retlen; + return cfi_amdstd_otp_walk(mtd, from, len, &retlen, NULL, + do_otp_lock, 1); +} + static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, map_word datum, int mode) |
