diff options
| -rw-r--r-- | drivers/mtd/chips/cfi_cmdset_0002.c | 90 |
1 files changed, 50 insertions, 40 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c index bac7c82e227a..63d69fab4b32 100644 --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -1637,11 +1637,11 @@ static int cfi_amdstd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, 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) +static int __xipram do_write_oneword_once(struct map_info *map, + struct flchip *chip, + unsigned long adr, map_word datum, + int mode, struct cfi_private *cfi) { - struct cfi_private *cfi = map->fldrv_priv; unsigned long timeo = jiffies + HZ; /* * We use a 1ms + 1 jiffies generic timeout for writes (most devices @@ -1654,42 +1654,7 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, */ unsigned long uWriteTimeout = (HZ / 1000) + 1; int ret = 0; - map_word oldd; - int retry_cnt = 0; - - adr += chip->start; - - mutex_lock(&chip->mutex); - ret = get_chip(map, chip, adr, mode); - if (ret) { - mutex_unlock(&chip->mutex); - return ret; - } - - pr_debug("MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", - __func__, adr, datum.x[0]); - - if (mode == FL_OTP_WRITE) - otp_enter(map, chip, adr, map_bankwidth(map)); - /* - * Check for a NOP for the case when the datum to write is already - * present - it saves time and works around buggy chips that corrupt - * data at other locations when 0xff is written to a location that - * already contains 0xff. - */ - oldd = map_read(map, adr); - if (map_word_equal(map, oldd, datum)) { - pr_debug("MTD %s(): NOP\n", - __func__); - goto op_done; - } - - XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); - ENABLE_VPP(map); - xip_disable(map, chip, adr); - - retry: 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(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); @@ -1737,7 +1702,52 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, UDELAY(map, chip, adr, 1); } - /* Did we succeed? */ + return ret; +} + +static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, + unsigned long adr, map_word datum, + int mode) +{ + struct cfi_private *cfi = map->fldrv_priv; + int ret = 0; + map_word oldd; + int retry_cnt = 0; + + adr += chip->start; + + mutex_lock(&chip->mutex); + ret = get_chip(map, chip, adr, mode); + if (ret) { + mutex_unlock(&chip->mutex); + return ret; + } + + pr_debug("MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", + __func__, adr, datum.x[0]); + + if (mode == FL_OTP_WRITE) + otp_enter(map, chip, adr, map_bankwidth(map)); + + /* + * Check for a NOP for the case when the datum to write is already + * present - it saves time and works around buggy chips that corrupt + * data at other locations when 0xff is written to a location that + * already contains 0xff. + */ + oldd = map_read(map, adr); + if (map_word_equal(map, oldd, datum)) { + pr_debug("MTD %s(): NOP\n", + __func__); + goto op_done; + } + + XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); + ENABLE_VPP(map); + xip_disable(map, chip, adr); + + retry: + ret = do_write_oneword_once(map, chip, adr, datum, mode, cfi); if (ret) { /* reset on all failures. */ cfi_check_err_status(map, chip, adr); |