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authorKyungmin Park <kyungmin.park@samsung.com>2008-02-13 15:55:38 +0900
committerDavid Woodhouse <dwmw2@infradead.org>2008-02-16 15:15:55 +0000
commit66a10506d632051e1153e2555f4b2c820d427f64 (patch)
tree458bf34c8b93a958306ad283d00d43c74142a72d /drivers/mtd/onenand
parent1309d4e68497184d2fd87e892ddf14076c2bda98 (diff)
[MTD] [OneNAND] Fix unlock all in Double Density Package (DDP)
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'drivers/mtd/onenand')
-rw-r--r--drivers/mtd/onenand/onenand_base.c32
1 files changed, 17 insertions, 15 deletions
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 8d7d21be154..15a62db656d 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -2052,7 +2052,7 @@ static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
*
* Check lock status
*/
-static void onenand_check_lock_status(struct onenand_chip *this)
+static int onenand_check_lock_status(struct onenand_chip *this)
{
unsigned int value, block, status;
unsigned int end;
@@ -2070,9 +2070,13 @@ static void onenand_check_lock_status(struct onenand_chip *this)
/* Check lock status */
status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
- if (!(status & ONENAND_WP_US))
+ if (!(status & ONENAND_WP_US)) {
printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status);
+ return 0;
+ }
}
+
+ return 1;
}
/**
@@ -2081,9 +2085,11 @@ static void onenand_check_lock_status(struct onenand_chip *this)
*
* Unlock all blocks
*/
-static int onenand_unlock_all(struct mtd_info *mtd)
+static void onenand_unlock_all(struct mtd_info *mtd)
{
struct onenand_chip *this = mtd->priv;
+ loff_t ofs = 0;
+ size_t len = this->chipsize;
if (this->options & ONENAND_HAS_UNLOCK_ALL) {
/* Set start block address */
@@ -2099,23 +2105,19 @@ static int onenand_unlock_all(struct mtd_info *mtd)
& ONENAND_CTRL_ONGO)
continue;
+ /* Check lock status */
+ if (onenand_check_lock_status(this))
+ return;
+
/* Workaround for all block unlock in DDP */
if (ONENAND_IS_DDP(this)) {
- /* 1st block on another chip */
- loff_t ofs = this->chipsize >> 1;
- size_t len = mtd->erasesize;
-
- onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
+ /* All blocks on another chip */
+ ofs = this->chipsize >> 1;
+ len = this->chipsize >> 1;
}
-
- onenand_check_lock_status(this);
-
- return 0;
}
- onenand_do_lock_cmd(mtd, 0x0, this->chipsize, ONENAND_CMD_UNLOCK);
-
- return 0;
+ onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
}
#ifdef CONFIG_MTD_ONENAND_OTP