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authorTodd Poynor <tpoynor@mvista.com>2005-03-29 23:06:40 +0100
committerThomas Gleixner <tglx@mtd.linutronix.de>2005-05-23 13:05:37 +0200
commit9a6e73ec4906bdf44ccfaaf8db56693b146595c0 (patch)
treeaffdbc2dbf1cf7058331e1bdbf70d1b6c8384ce8 /drivers
parent1a78ff6b4114cfb0f734b7df217759315d692683 (diff)
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[MTD] cfi_cmdset_0001: Skip delay if Instant Block Locking is set
Skip jiffy delay after each block lock/unlock for Intel CFI flash with the "Instant Individual Block Locking" feature bit set. Signed-off-by: Todd Poynor <tpoynor@mvista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0001.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 100a00063f8..51675bb2f83 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -4,7 +4,7 @@
*
* (C) 2000 Red Hat. GPL'd
*
- * $Id: cfi_cmdset_0001.c,v 1.171 2005/03/19 22:39:49 gleixner Exp $
+ * $Id: cfi_cmdset_0001.c,v 1.172 2005/03/29 22:06:37 tpoynor Exp $
*
*
* 10/10/2000 Nicolas Pitre <nico@cam.org>
@@ -1823,6 +1823,7 @@ static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip
unsigned long adr, int len, void *thunk)
{
struct cfi_private *cfi = map->fldrv_priv;
+ struct cfi_pri_intelext *extp = cfi->cmdset_priv;
map_word status, status_OK;
unsigned long timeo = jiffies + HZ;
int ret;
@@ -1852,9 +1853,16 @@ static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip
} else
BUG();
- spin_unlock(chip->mutex);
- UDELAY(map, chip, adr, 1000000/HZ);
- spin_lock(chip->mutex);
+ /*
+ * If Instant Individual Block Locking supported then no need
+ * to delay.
+ */
+
+ if (!extp || !(extp->FeatureSupport & (1 << 5))) {
+ spin_unlock(chip->mutex);
+ UDELAY(map, chip, adr, 1000000/HZ);
+ spin_lock(chip->mutex);
+ }
/* FIXME. Use a timer to check this, and return immediately. */
/* Once the state machine's known to be working I'll do that */