diff options
Diffstat (limited to 'drivers/mtd/nand/nand_util.c')
| -rw-r--r-- | drivers/mtd/nand/nand_util.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/mtd/nand/nand_util.c b/drivers/mtd/nand/nand_util.c index 2ba0c5ef95..ff2d348307 100644 --- a/drivers/mtd/nand/nand_util.c +++ b/drivers/mtd/nand/nand_util.c @@ -237,6 +237,14 @@ int nand_lock(struct mtd_info *mtd, int tight) /* select the NAND device */ chip->select_chip(mtd, 0); + /* check the Lock Tight Status */ + chip->cmdfunc(mtd, NAND_CMD_LOCK_STATUS, -1, 0); + if (chip->read_byte(mtd) & NAND_LOCK_STATUS_TIGHT) { + printf("nand_lock: Device is locked tight!\n"); + ret = -1; + goto out; + } + chip->cmdfunc(mtd, (tight ? NAND_CMD_LOCK_TIGHT : NAND_CMD_LOCK), -1, -1); @@ -249,6 +257,7 @@ int nand_lock(struct mtd_info *mtd, int tight) ret = -1; } + out: /* de-select the NAND device */ chip->select_chip(mtd, -1); return ret; @@ -337,6 +346,15 @@ int nand_unlock(struct mtd_info *mtd, loff_t start, size_t length, goto out; } + /* check the Lock Tight Status */ + page = (int)(start >> chip->page_shift); + chip->cmdfunc(mtd, NAND_CMD_LOCK_STATUS, -1, page & chip->pagemask); + if (chip->read_byte(mtd) & NAND_LOCK_STATUS_TIGHT) { + printf("nand_unlock: Device is locked tight!\n"); + ret = -1; + goto out; + } + if ((start & (mtd->erasesize - 1)) != 0) { printf("nand_unlock: Start address must be beginning of " "nand block!\n"); @@ -358,7 +376,6 @@ int nand_unlock(struct mtd_info *mtd, loff_t start, size_t length, length -= mtd->erasesize; /* submit address of first page to unlock */ - page = (int)(start >> chip->page_shift); chip->cmdfunc(mtd, NAND_CMD_UNLOCK1, -1, page & chip->pagemask); /* submit ADDRESS of LAST page to unlock */ |