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Commit 6f0fa660 authored by Ondrej Zary's avatar Ondrej Zary Committed by Takashi Iwai
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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: default avatarOndrej Zary <linux@rainbow-software.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent c86b6b45

include/sound/ad1816a.h

+7 −0
Original line number Diff line number Diff line
@@ -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 */

sound/isa/ad1816a/ad1816a.c

+25 −1
Original line number Diff line number Diff line
@@ -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)

sound/isa/ad1816a/ad1816a_lib.c

+27 −1
Original line number Diff line number Diff line
@@ -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;