diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/nand_util.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/mtd/nand/nand_util.c b/drivers/mtd/nand/nand_util.c index 7ed8b18..c66eeef 100644 --- a/drivers/mtd/nand/nand_util.c +++ b/drivers/mtd/nand/nand_util.c @@ -317,18 +317,20 @@ int nand_get_lock_status(struct mtd_info *mtd, loff_t offset) * @param start start byte address * @param length number of bytes to unlock (must be a multiple of * page size nand->writesize) + * @param allexcept if set, unlock everything not selected * * @return 0 on success, -1 in case of error */ -int nand_unlock(struct mtd_info *mtd, ulong start, ulong length) +int nand_unlock(struct mtd_info *mtd, ulong start, ulong length, int allexcept) { int ret = 0; int chipnr; int status; int page; struct nand_chip *chip = mtd->priv; - printf ("nand_unlock: start: %08x, length: %d!\n", - (int)start, (int)length); + + debug("nand_unlock%s: start: %08x, length: %d!\n", + allexcept ? " (allexcept)" : "", start, length); /* select the NAND device */ chipnr = (int)(start >> chip->chip_shift); @@ -368,6 +370,15 @@ int nand_unlock(struct mtd_info *mtd, ulong start, ulong length) /* submit ADDRESS of LAST page to unlock */ page += (int)(length >> chip->page_shift); + + /* + * Page addresses for unlocking are supposed to be block-aligned. + * At least some NAND chips use the low bit to indicate that the + * page range should be inverted. + */ + if (allexcept) + page |= 1; + chip->cmdfunc(mtd, NAND_CMD_UNLOCK2, -1, page & chip->pagemask); /* call wait ready function */ |