[ALSA] als4000 - Add PM support
Takashi Iwai [Thu, 17 Nov 2005 15:16:36 +0000 (16:16 +0100)]
Modules: ALS4000 driver

Add PM support to PCI ALS4000 driver.

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

sound/pci/als4000.c

index 8d0d9c0..7b2ff5f 100644 (file)
@@ -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)