NAND unlock command allows an invert bit to be set to unlock all but
the selected page range.
Signed-off-by: Joe Hershberger <joe.hershber...@ni.com>
---
Changes in v2:
- Changed invert to allexcept
- Changed unlock printf to debug print
- Dropped cast in unlock debug print
common/cmd_nand.c | 13 ++++++++++---
drivers/mtd/nand/nand_util.c | 10 +++++++---
include/nand.h | 4 ++--
3 files changed, 19 insertions(+), 8 deletions(-)
diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index a91ccf4..f737c06 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 allexcept = 0;
+
+ s = strchr(cmd, '.');
+
+ if (s && !strcmp(s, ".allexcept"))
+ allexcept = 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, allexcept)) {
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[.allexcept] [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..21a011c 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 +370,8 @@ 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 (allexcept)
+ 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..9a30796 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
allexcept);
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);
--
1.7.11.5
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