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[ALSA] ak4531 - Add PM support 

Modules: AK4531 codec

Add PM support to AK4531 codec driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2005-11-17 16:13:05 +01:00 committed by Jaroslav Kysela
parent 3fcf7d2cd8
commit 11d3824ad7
2 changed files with 40 additions and 1 deletions
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5
include/sound/ak4531_codec.h
View File

@ -77,4 +77,9 @@ struct snd_ak4531 {
int snd_ak4531_mixer(struct snd_card *card, struct snd_ak4531 *_ak4531,
struct snd_ak4531 **rak4531);
#ifdef CONFIG_PM
void snd_ak4531_suspend(struct snd_ak4531 *ak4531);
void snd_ak4531_resume(struct snd_ak4531 *ak4531);
#endif
#endif /* __SOUND_AK4531_CODEC_H */

36
sound/pci/ac97/ak4531_codec.c
View File

@ -371,7 +371,7 @@ int snd_ak4531_mixer(struct snd_card *card, struct snd_ak4531 *_ak4531,
ak4531->write(ak4531, AK4531_RESET, 0x03); /* no RST, PD */
udelay(100);
ak4531->write(ak4531, AK4531_CLOCK, 0x00); /* CODEC ADC and CODEC DAC use {LR,B}CLK2 and run off LRCLK2 PLL */
for (idx = 0; idx < 0x19; idx++) {
for (idx = 0; idx <= 0x19; idx++) {
if (idx == AK4531_RESET || idx == AK4531_CLOCK)
continue;
ak4531->write(ak4531, idx, ak4531->regs[idx] = snd_ak4531_initial_map[idx]); /* recording source is mixer */
@ -395,6 +395,36 @@ int snd_ak4531_mixer(struct snd_card *card, struct snd_ak4531 *_ak4531,
return 0;
}
/*
* power management
*/
#ifdef CONFIG_PM
void snd_ak4531_suspend(struct snd_ak4531 *ak4531)
{
/* mute */
ak4531->write(ak4531, AK4531_LMASTER, 0x9f);
ak4531->write(ak4531, AK4531_RMASTER, 0x9f);
/* powerdown */
ak4531->write(ak4531, AK4531_RESET, 0x01);
}
void snd_ak4531_resume(struct snd_ak4531 *ak4531)
{
int idx;
/* initialize */
ak4531->write(ak4531, AK4531_RESET, 0x03);
udelay(100);
ak4531->write(ak4531, AK4531_CLOCK, 0x00);
/* restore mixer registers */
for (idx = 0; idx <= 0x19; idx++) {
if (idx == AK4531_RESET || idx == AK4531_CLOCK)
continue;
ak4531->write(ak4531, idx, ak4531->regs[idx]);
}
}
#endif
/*
*/
@ -420,6 +450,10 @@ static void snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak453
}
EXPORT_SYMBOL(snd_ak4531_mixer);
#ifdef CONFIG_PM
EXPORT_SYMBOL(snd_ak4531_suspend);
EXPORT_SYMBOL(snd_ak4531_resume);
#endif
/*
* INIT part