[ALSA] als4000 - Add PM support

Modules: ALS4000 driver

Add PM support to PCI ALS4000 driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 69 insertions, 7 deletions

diff --git a/sound/pci/als4000.c b/sound/pci/als4000.c
index 8d0d9c0222c1..7b2ff5f4672e 100644
--- a/sound/pci/als4000.c
+++ b/sound/pci/als4000.c
@@ -109,6 +109,7 @@ struct snd_card_als4000 {
         /* most frequent access first */
         unsigned long gcr;
         struct pci_dev *pci;
+        struct snd_sb *chip;
 #ifdef SUPPORT_JOYSTICK
         struct gameport *gameport;
 #endif
@@ -305,14 +306,20 @@ static int snd_als4000_capture_trigger(struct snd_pcm_substream *substream, int
         int result = 0;
         
         spin_lock(&chip->mixer_lock);
-        if (cmd == SNDRV_PCM_TRIGGER_START) {
+        switch (cmd) {
+        case SNDRV_PCM_TRIGGER_START:
+        case SNDRV_PCM_TRIGGER_RESUME:
                 chip->mode |= SB_RATE_LOCK_CAPTURE;
                 snd_sbmixer_write(chip, 0xde, capture_cmd(chip));
-        } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
+                break;
+        case SNDRV_PCM_TRIGGER_STOP:
+        case SNDRV_PCM_TRIGGER_SUSPEND:
                 chip->mode &= ~SB_RATE_LOCK_CAPTURE;
                 snd_sbmixer_write(chip, 0xde, 0);
-        } else {
+                break;
+        default:
                 result = -EINVAL;
+                break;
         }
         spin_unlock(&chip->mixer_lock);
         return result;
@@ -324,14 +331,20 @@ static int snd_als4000_playback_trigger(struct snd_pcm_substream *substream, int
         int result = 0;
 
         spin_lock(&chip->reg_lock);
-        if (cmd == SNDRV_PCM_TRIGGER_START) {
+        switch (cmd) {
+        case SNDRV_PCM_TRIGGER_START:
+        case SNDRV_PCM_TRIGGER_RESUME:
                 chip->mode |= SB_RATE_LOCK_PLAYBACK;
                 snd_sbdsp_command(chip, playback_cmd(chip).dma_on);
-        } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
+                break;
+        case SNDRV_PCM_TRIGGER_STOP:
+        case SNDRV_PCM_TRIGGER_SUSPEND:
                 snd_sbdsp_command(chip, playback_cmd(chip).dma_off);
                 chip->mode &= ~SB_RATE_LOCK_PLAYBACK;
-        } else {
+                break;
+        default:
                 result = -EINVAL;
+                break;
         }
         spin_unlock(&chip->reg_lock);
         return result;
@@ -551,7 +564,7 @@ static void snd_als4000_set_addr(unsigned long gcr,
         snd_als4000_gcr_write_addr(gcr, 0xa9, confB);
 }
 
-static void __devinit snd_als4000_configure(struct snd_sb *chip)
+static void snd_als4000_configure(struct snd_sb *chip)
 {
         unsigned tmp;
         int i;
@@ -718,6 +731,7 @@ static int __devinit snd_card_als4000_probe(struct pci_dev *pci,
                                     &chip)) < 0) {
                 goto out_err;
         }
+        acard->chip = chip;
 
         chip->pci = pci;
         chip->alt_port = gcr;
@@ -777,11 +791,59 @@ static void __devexit snd_card_als4000_remove(struct pci_dev *pci)
         pci_set_drvdata(pci, NULL);
 }
 
+#ifdef CONFIG_PM
+static int snd_als4000_suspend(struct pci_dev *pci, pm_message_t state)
+{
+        struct snd_card *card = pci_get_drvdata(pci);
+        struct snd_card_als4000 *acard = card->private_data;
+        struct snd_sb *chip = acard->chip;
+
+        snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+        
+        snd_pcm_suspend_all(chip->pcm);
+        snd_sbmixer_suspend(chip);
+
+        pci_set_power_state(pci, PCI_D3hot);
+        pci_disable_device(pci);
+        pci_save_state(pci);
+        return 0;
+}
+
+static int snd_als4000_resume(struct pci_dev *pci)
+{
+        struct snd_card *card = pci_get_drvdata(pci);
+        struct snd_card_als4000 *acard = card->private_data;
+        struct snd_sb *chip = acard->chip;
+
+        pci_restore_state(pci);
+        pci_enable_device(pci);
+        pci_set_power_state(pci, PCI_D0);
+        pci_set_master(pci);
+
+        snd_als4000_configure(chip);
+        snd_sbdsp_reset(chip);
+        snd_sbmixer_resume(chip);
+
+#ifdef SUPPORT_JOYSTICK
+        if (acard->gameport)
+                snd_als4000_set_addr(acard->gcr, 0, 0, 0, 1);
+#endif
+
+        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+        return 0;
+}
+#endif
+
+
 static struct pci_driver driver = {
         .name = "ALS4000",
         .id_table = snd_als4000_ids,
         .probe = snd_card_als4000_probe,
         .remove = __devexit_p(snd_card_als4000_remove),
+#ifdef CONFIG_PM
+        .suspend = snd_als4000_suspend,
+        .resume = snd_als4000_resume,
+#endif
 };
 
 static int __init alsa_card_als4000_init(void)