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ALSA: snd-ad1816a: Implement suspend/resume 

Implement suspend/resume support for AD1816 chips.
Tested with Terratec SoundSystem Base-1.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Ondrej Zary 2012-08-19 23:27:26 +02:00 committed by Takashi Iwai
parent c86b6b452a
commit 6f0fa66051
3 changed files with 59 additions and 2 deletions
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7
include/sound/ad1816a.h
View File

@ -147,6 +147,9 @@ struct snd_ad1816a {
unsigned int c_dma_size;
struct snd_timer *timer;
#ifdef CONFIG_PM
unsigned short image[48];
#endif
};
@ -171,5 +174,9 @@ extern int snd_ad1816a_pcm(struct snd_ad1816a *chip, int device, struct snd_pcm
extern int snd_ad1816a_mixer(struct snd_ad1816a *chip);
extern int snd_ad1816a_timer(struct snd_ad1816a *chip, int device,
struct snd_timer **rtimer);
#ifdef CONFIG_PM
extern void snd_ad1816a_suspend(struct snd_ad1816a *chip);
extern void snd_ad1816a_resume(struct snd_ad1816a *chip);
#endif
#endif /* __SOUND_AD1816A_H */

26
sound/isa/ad1816a/ad1816a.c
View File

@ -244,13 +244,37 @@ static void __devexit snd_ad1816a_pnp_remove(struct pnp_card_link * pcard)
pnp_set_card_drvdata(pcard, NULL);
}
#ifdef CONFIG_PM
static int snd_ad1816a_pnp_suspend(struct pnp_card_link *pcard,
pm_message_t state)
{
struct snd_card *card = pnp_get_card_drvdata(pcard);
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
snd_ad1816a_suspend(card->private_data);
return 0;
}
static int snd_ad1816a_pnp_resume(struct pnp_card_link *pcard)
{
struct snd_card *card = pnp_get_card_drvdata(pcard);
snd_ad1816a_resume(card->private_data);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
#endif
static struct pnp_card_driver ad1816a_pnpc_driver = {
.flags = PNP_DRIVER_RES_DISABLE,
.name = "ad1816a",
.id_table = snd_ad1816a_pnpids,
.probe = snd_ad1816a_pnp_detect,
.remove = __devexit_p(snd_ad1816a_pnp_remove),
/* FIXME: suspend/resume */
#ifdef CONFIG_PM
.suspend = snd_ad1816a_pnp_suspend,
.resume = snd_ad1816a_pnp_resume,
#endif
};
static int __init alsa_card_ad1816a_init(void)

28
sound/isa/ad1816a/ad1816a_lib.c
View File

@ -491,7 +491,7 @@ static int snd_ad1816a_capture_close(struct snd_pcm_substream *substream)
}
static void __devinit snd_ad1816a_init(struct snd_ad1816a *chip)
static void snd_ad1816a_init(struct snd_ad1816a *chip)
{
unsigned long flags;
@ -511,6 +511,32 @@ static void __devinit snd_ad1816a_init(struct snd_ad1816a *chip)
spin_unlock_irqrestore(&chip->lock, flags);
}
#ifdef CONFIG_PM
void snd_ad1816a_suspend(struct snd_ad1816a *chip)
{
int reg;
unsigned long flags;
snd_pcm_suspend_all(chip->pcm);
spin_lock_irqsave(&chip->lock, flags);
for (reg = 0; reg < 48; reg++)
chip->image[reg] = snd_ad1816a_read(chip, reg);
spin_unlock_irqrestore(&chip->lock, flags);
}
void snd_ad1816a_resume(struct snd_ad1816a *chip)
{
int reg;
unsigned long flags;
snd_ad1816a_init(chip);
spin_lock_irqsave(&chip->lock, flags);
for (reg = 0; reg < 48; reg++)
snd_ad1816a_write(chip, reg, chip->image[reg]);
spin_unlock_irqrestore(&chip->lock, flags);
}
#endif
static int __devinit snd_ad1816a_probe(struct snd_ad1816a *chip)
{
unsigned long flags;