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[MTD] cfi_cmdset_0001: Skip delay if Instant Block Locking is set

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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>
This commit is contained in:
Todd Poynor 2005-03-29 23:06:40 +01:00 • committed by Thomas Gleixner
parent 1a78ff6b41
commit 9a6e73ec49
1 changed files with 12 additions and 4 deletions
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10
drivers/mtd/chips/cfi_cmdset_0001.c
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@ -4,7 +4,7 @@
* *
* (C) 2000 Red Hat. GPL'd * (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> * 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) unsigned long adr, int len, void *thunk)
{ {
struct cfi_private *cfi = map->fldrv_priv; struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *extp = cfi->cmdset_priv;
map_word status, status_OK; map_word status, status_OK;
unsigned long timeo = jiffies + HZ; unsigned long timeo = jiffies + HZ;
int ret; int ret;
@ -1852,9 +1853,16 @@ static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip
} else } else
BUG(); BUG();
/*
* If Instant Individual Block Locking supported then no need
* to delay.
*/
if (!extp || !(extp->FeatureSupport & (1 << 5))) {
spin_unlock(chip->mutex); spin_unlock(chip->mutex);
UDELAY(map, chip, adr, 1000000/HZ); UDELAY(map, chip, adr, 1000000/HZ);
spin_lock(chip->mutex); spin_lock(chip->mutex);
}
/* FIXME. Use a timer to check this, and return immediately. */ /* FIXME. Use a timer to check this, and return immediately. */
/* Once the state machine's known to be working I'll do that */ /* Once the state machine's known to be working I'll do that */