NAND unlock command allows an invert bit to be set to unlock all but the selected page range.
Signed-off-by: Joe Hershberger joe.hershberger@ni.com --- common/cmd_nand.c | 13 ++++++++++--- drivers/mtd/nand/nand_util.c | 9 ++++++--- include/nand.h | 4 ++-- 3 files changed, 18 insertions(+), 8 deletions(-)
diff --git a/common/cmd_nand.c b/common/cmd_nand.c index a91ccf4..9acac9f 100644 --- a/common/cmd_nand.c +++ b/common/cmd_nand.c @@ -749,11 +749,18 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) return 0; }
- if (strcmp(cmd, "unlock") == 0) { + if (strncmp(cmd, "unlock", 5) == 0) { + int invert = 0; + + s = strchr(cmd, '.'); + + if (s && !strcmp(s, ".invert")) + invert = 1; + if (arg_off_size(argc - 2, argv + 2, &dev, &off, &size) < 0) return 1;
- if (!nand_unlock(&nand_info[dev], off, size)) { + if (!nand_unlock(&nand_info[dev], off, size, invert)) { puts("NAND flash successfully unlocked\n"); } else { puts("Error unlocking NAND flash, " @@ -807,7 +814,7 @@ U_BOOT_CMD( "\n" "nand lock [tight] [status]\n" " bring nand to lock state or display locked pages\n" - "nand unlock [offset] [size] - unlock section" + "nand unlock[.invert] [offset] [size] - unlock section" #endif #ifdef CONFIG_ENV_OFFSET_OOB "\n" diff --git a/drivers/mtd/nand/nand_util.c b/drivers/mtd/nand/nand_util.c index 7ed8b18..87caa62 100644 --- a/drivers/mtd/nand/nand_util.c +++ b/drivers/mtd/nand/nand_util.c @@ -317,18 +317,19 @@ 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 invert 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 invert) { 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); + printf("nand_unlock%s: start: %08x, length: %d!\n", + invert ? " (invert)" : "", (int)start, (int)length);
/* select the NAND device */ chipnr = (int)(start >> chip->chip_shift); @@ -368,6 +369,8 @@ int nand_unlock(struct mtd_info *mtd, ulong start, ulong length)
/* submit ADDRESS of LAST page to unlock */ page += (int)(length >> chip->page_shift); + if (invert) + page |= 1; chip->cmdfunc(mtd, NAND_CMD_UNLOCK2, -1, page & chip->pagemask);
/* call wait ready function */ diff --git a/include/nand.h b/include/nand.h index a48b1b8..2c2f588 100644 --- a/include/nand.h +++ b/include/nand.h @@ -144,8 +144,8 @@ int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts); #define NAND_LOCK_STATUS_LOCK 0x02 #define NAND_LOCK_STATUS_UNLOCK 0x04
-int nand_lock( nand_info_t *meminfo, int tight ); -int nand_unlock( nand_info_t *meminfo, ulong start, ulong length ); +int nand_lock(nand_info_t *meminfo, int tight); +int nand_unlock(nand_info_t *meminfo, ulong start, ulong length, int invert); int nand_get_lock_status(nand_info_t *meminfo, loff_t offset);
int nand_spl_load_image(uint32_t offs, unsigned int size, void *dst);