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mtd: nand: add lock/unlock routines

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Add nand lock / unlock routines. At least 'micron' parts
support this.

Signed-off-by: Vimal Singh <vimalsingh@ti.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Vimal Singh 2010-02-08 15:50:49 +05:30 • committed by David Woodhouse
parent 6fe5a6acdc
commit 7d70f334ad
2 changed files with 174 additions and 0 deletions
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10
include/linux/mtd/nand.h
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@ -38,6 +38,12 @@ extern void nand_release (struct mtd_info *mtd);
/* Internal helper for board drivers which need to override command function */
extern void nand_wait_ready(struct mtd_info *mtd);
/* locks all blockes present in the device */
extern int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
/* unlocks specified locked blockes */
extern int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
/* The maximum number of NAND chips in an array */
#define NAND_MAX_CHIPS 8
@ -82,6 +88,10 @@ extern void nand_wait_ready(struct mtd_info *mtd);
#define NAND_CMD_ERASE2 0xd0
#define NAND_CMD_RESET 0xff
#define NAND_CMD_LOCK 0x2a
#define NAND_CMD_UNLOCK1 0x23
#define NAND_CMD_UNLOCK2 0x24
/* Extended commands for large page devices */
#define NAND_CMD_READSTART 0x30
#define NAND_CMD_RNDOUTSTART 0xE0