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nand: Make NAND lock status compatible with Micron 

Micron NAND flash (e.g. MT29F4G08ABADAH4) BLOCK LOCK READ STATUS is not
the same as others.  Instead of bit 1 being lock, it is #lock_tight.
To make the driver support either format, ignore bit 1 and use only
bit 0 and bit 2.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Joe Hershberger 2012-08-22 16:49:45 -05:00 committed by Scott Wood
parent 33b1d5cae3
commit e70bfa2986
3 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
common/cmd_nand.c
View File

@ -231,12 +231,18 @@ print:
#ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
static void print_status(ulong start, ulong end, ulong erasesize, int status)
{
/*
* Micron NAND flash (e.g. MT29F4G08ABADAH4) BLOCK LOCK READ STATUS is
* not the same as others. Instead of bit 1 being lock, it is
* #lock_tight. To make the driver support either format, ignore bit 1
* and use only bit 0 and bit 2.
*/
printf("%08lx - %08lx: %08lx blocks %s%s%s\n",
start,
end - 1,
(end - start) / erasesize,
((status & NAND_LOCK_STATUS_TIGHT) ? "TIGHT " : ""),
((status & NAND_LOCK_STATUS_LOCK) ? "LOCK " : ""),
(!(status & NAND_LOCK_STATUS_UNLOCK) ? "LOCK " : ""),
((status & NAND_LOCK_STATUS_UNLOCK) ? "UNLOCK " : ""));
}

2
drivers/mtd/nand/nand_util.c
View File

@ -265,7 +265,6 @@ int nand_lock(struct mtd_info *mtd, int tight)
* >0 lock status:
* bitfield with the following combinations:
* NAND_LOCK_STATUS_TIGHT: page in tight state
* NAND_LOCK_STATUS_LOCK: page locked
* NAND_LOCK_STATUS_UNLOCK: page unlocked
*
*/
@ -294,7 +293,6 @@ int nand_get_lock_status(struct mtd_info *mtd, loff_t offset)
chip->cmdfunc(mtd, NAND_CMD_LOCK_STATUS, -1, page & chip->pagemask);
ret = chip->read_byte(mtd) & (NAND_LOCK_STATUS_TIGHT
| NAND_LOCK_STATUS_LOCK
| NAND_LOCK_STATUS_UNLOCK);
out:

1
include/nand.h
View File

@ -141,7 +141,6 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
#define NAND_LOCK_STATUS_TIGHT 0x01
#define NAND_LOCK_STATUS_LOCK 0x02
#define NAND_LOCK_STATUS_UNLOCK 0x04
int nand_lock(nand_info_t *meminfo, int tight);