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authorJaroslav Kysela <perex@suse.cz>2006-02-15 13:31:23 +0100
committerJaroslav Kysela <perex@suse.cz>2006-03-22 10:29:29 +0100
commit253b999f5a620be81db4cfa31f76873b639ec9a2 (patch)
tree9e329b3739d520989e5ca121bc100bdb7a7cce44
parentf7004f3975591f3d4cdf457f879e9ede57394500 (diff)
[ALSA] intel8x0 - wait for ICH_RESETREGS
Modules: Intel8x0 driver It seems that hardware requires some time to reset bus master registers. We need to wait until ICH_RESETREGS bit is not released. The suggestion and symptom was described by Mike Gorchak <lestat@i.com.ua>. Signed-off-by: Jaroslav Kysela <perex@suse.cz>
-rw-r--r--sound/pci/intel8x0.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
index da024ffe96c..ebbf2cf4ca0 100644
--- a/sound/pci/intel8x0.c
+++ b/sound/pci/intel8x0.c
@@ -2351,7 +2351,7 @@ static int snd_intel8x0_ali_chip_init(struct intel8x0 *chip, int probing)
static int snd_intel8x0_chip_init(struct intel8x0 *chip, int probing)
{
- unsigned int i;
+ unsigned int i, timeout;
int err;
if (chip->device_type != DEVICE_ALI) {
@@ -2369,6 +2369,15 @@ static int snd_intel8x0_chip_init(struct intel8x0 *chip, int probing)
/* reset channels */
for (i = 0; i < chip->bdbars_count; i++)
iputbyte(chip, ICH_REG_OFF_CR + chip->ichd[i].reg_offset, ICH_RESETREGS);
+ for (i = 0; i < chip->bdbars_count; i++) {
+ timeout = 100000;
+ while (--timeout != 0) {
+ if ((igetbyte(chip, ICH_REG_OFF_CR + chip->ichd[i].reg_offset) & ICH_RESETREGS) == 0)
+ break;
+ }
+ if (timeout == 0)
+ printk(KERN_ERR "intel8x0: reset of registers failed?\n");
+ }
/* initialize Buffer Descriptor Lists */
for (i = 0; i < chip->bdbars_count; i++)
iputdword(chip, ICH_REG_OFF_BDBAR + chip->ichd[i].reg_offset,