[ALSA] als100 - Add PM support

Modules: ALS100 driver

Add PM support to als100 driver.

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

1 files changed, 41 insertions, 10 deletions

diff --git a/sound/isa/als100.c b/sound/isa/als100.c
index 0d709bc50c16..9b77c17b3f66 100644
--- a/sound/isa/als100.c
+++ b/sound/isa/als100.c
@@ -83,6 +83,7 @@ struct snd_card_als100 {
         struct pnp_dev *dev;
         struct pnp_dev *devmpu;
         struct pnp_dev *devopl;
+        struct snd_sb *chip;
 };
 
 static struct pnp_card_device_id snd_als100_pnpids[] = {
@@ -211,7 +212,7 @@ static int __init snd_card_als100_probe(int dev,
         if ((card = snd_card_new(index[dev], id[dev], THIS_MODULE,
                                  sizeof(struct snd_card_als100))) == NULL)
                 return -ENOMEM;
-        acard = (struct snd_card_als100 *)card->private_data;
+        acard = card->private_data;
 
         if ((error = snd_card_als100_pnp(dev, acard, pcard, pid))) {
                 snd_card_free(card);
@@ -228,6 +229,7 @@ static int __init snd_card_als100_probe(int dev,
                 snd_card_free(card);
                 return error;
         }
+        acard->chip = chip;
 
         strcpy(card->driver, "ALS100");
         strcpy(card->shortname, "Avance Logic ALS100");
@@ -299,11 +301,35 @@ static int __devinit snd_als100_pnp_detect(struct pnp_card_link *card,
 
 static void __devexit snd_als100_pnp_remove(struct pnp_card_link * pcard)
 {
-        struct snd_card *card = (struct snd_card *) pnp_get_card_drvdata(pcard);
+        snd_card_free(pnp_get_card_drvdata(pcard));
+        pnp_set_card_drvdata(pcard, NULL);
+}
+
+#ifdef CONFIG_PM
+static int snd_als100_pnp_suspend(struct pnp_card_link *pcard, pm_message_t state)
+{
+        struct snd_card *card = pnp_get_card_drvdata(pcard);
+        struct snd_card_als100 *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);
+        return 0;
+}
+
+static int snd_als100_pnp_resume(struct pnp_card_link *pcard)
+{
+        struct snd_card *card = pnp_get_card_drvdata(pcard);
+        struct snd_card_als100 *acard = card->private_data;
+        struct snd_sb *chip = acard->chip;
 
-        snd_card_disconnect(card);
-        snd_card_free_in_thread(card);
+        snd_sbdsp_reset(chip);
+        snd_sbmixer_resume(chip);
+        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+        return 0;
 }
+#endif
 
 static struct pnp_card_driver als100_pnpc_driver = {
         .flags          = PNP_DRIVER_RES_DISABLE,
@@ -311,20 +337,25 @@ static struct pnp_card_driver als100_pnpc_driver = {
         .id_table       = snd_als100_pnpids,
         .probe          = snd_als100_pnp_detect,
         .remove         = __devexit_p(snd_als100_pnp_remove),
+#ifdef CONFIG_PM
+        .suspend        = snd_als100_pnp_suspend,
+        .resume         = snd_als100_pnp_resume,
+#endif
 };
 
 static int __init alsa_card_als100_init(void)
 {
-        int cards = 0;
+        int cards;
 
-        cards += pnp_register_card_driver(&als100_pnpc_driver);
-#ifdef MODULE
-        if (!cards) {
+        cards = pnp_register_card_driver(&als100_pnpc_driver);
+        if (cards <= 0) {
                 pnp_unregister_card_driver(&als100_pnpc_driver);
+#ifdef MODULE
                 snd_printk(KERN_ERR "no ALS100 based soundcards found\n");
-        }
 #endif
-        return cards ? 0 : -ENODEV;
+                return -ENODEV;
+        }
+        return 0;
 }
 
 static void __exit alsa_card_als100_exit(void)