From 253b999f5a620be81db4cfa31f76873b639ec9a2 Mon Sep 17 00:00:00 2001 From: Jaroslav Kysela Date: Wed, 15 Feb 2006 13:31:23 +0100 Subject: [PATCH] [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 . Signed-off-by: Jaroslav Kysela --- sound/pci/intel8x0.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c index da024ffe96c2..ebbf2cf4ca0f 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, -- 2.20.1