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Message-Id: <201208192327.27334.linux@rainbow-software.org>
Date: Sun, 19 Aug 2012 23:27:26 +0200
From: Ondrej Zary <linux@...nbow-software.org>
To: Massimo Piccioni <dafastidio@...ero.it>
Cc: alsa-devel@...a-project.org,
Kernel development list <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/2] snd-ad1816a: Implement suspend/resume
Implement suspend/resume support for AD1816 chips.
Tested with Terratec SoundSystem Base-1.
Signed-off-by: Ondrej Zary <linux@...nbow-software.org>
diff --git a/include/sound/ad1816a.h b/include/sound/ad1816a.h
index 62da41e..2a89f0d 100644
--- a/include/sound/ad1816a.h
+++ b/include/sound/ad1816a.h
@@ -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 */
diff --git a/sound/isa/ad1816a/ad1816a.c b/sound/isa/ad1816a/ad1816a.c
index 1a374e6..2c2f829 100644
--- a/sound/isa/ad1816a/ad1816a.c
+++ b/sound/isa/ad1816a/ad1816a.c
@@ -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)
diff --git a/sound/isa/ad1816a/ad1816a_lib.c b/sound/isa/ad1816a/ad1816a_lib.c
index de5cc1c..db64df6 100644
--- a/sound/isa/ad1816a/ad1816a_lib.c
+++ b/sound/isa/ad1816a/ad1816a_lib.c
@@ -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;
--
Ondrej Zary
--
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