unsigned int snd_cards_lock = 0; /* locked for registering/using */
snd_card_t *snd_cards[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = NULL};
-rwlock_t snd_card_rwlock = RW_LOCK_UNLOCKED;
+DEFINE_RWLOCK(snd_card_rwlock);
#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
int (*snd_mixer_oss_notify_callback)(snd_card_t *card, int free_flag);
write_lock(&snd_card_rwlock);
if (idx < 0) {
int idx2;
- for (idx2 = 0; idx2 < snd_ecards_limit; idx2++)
- if (!(snd_cards_lock & (1 << idx2))) {
+ for (idx2 = 0; idx2 < SNDRV_CARDS; idx2++)
+ if (~snd_cards_lock & idx & 1<<idx2) {
idx = idx2;
+ if (idx >= snd_ecards_limit)
+ snd_ecards_limit = idx + 1;
break;
}
- if (idx < 0 && snd_ecards_limit < SNDRV_CARDS)
- /* for dynamically additional devices like hotplug:
- * increment the limit if still free slot exists.
- */
- idx = snd_ecards_limit++;
} else if (idx < snd_ecards_limit) {
if (snd_cards_lock & (1 << idx))
err = -ENODEV; /* invalid */
return 0;
}
+#if defined(CONFIG_PM) && defined(CONFIG_SND_GENERIC_PM)
+static void snd_generic_device_unregister(struct snd_generic_device *dev);
+#endif
+
/**
* snd_card_free - frees given soundcard structure
* @card: soundcard structure
#ifdef CONFIG_PM
wake_up(&card->power_sleep);
-#ifdef CONFIG_ISA
+#ifdef CONFIG_SND_GENERIC_PM
if (card->pm_dev) {
- pm_unregister(card->pm_dev);
+ snd_generic_device_unregister(card->pm_dev);
card->pm_dev = NULL;
}
#endif
while (1) {
if (loops-- == 0) {
- snd_printk(KERN_ERR "unable to choose default card id (%s)", id);
+ snd_printk(KERN_ERR "unable to choose default card id (%s)\n", id);
strcpy(card->id, card->proc_root->name);
return;
}
* handler and from the control API.
*/
int snd_card_set_pm_callback(snd_card_t *card,
- int (*suspend)(snd_card_t *, unsigned int),
- int (*resume)(snd_card_t *, unsigned int),
+ int (*suspend)(snd_card_t *, pm_message_t),
+ int (*resume)(snd_card_t *),
void *private_data)
{
card->pm_suspend = suspend;
return 0;
}
-static int snd_generic_pm_callback(struct pm_dev *dev, pm_request_t rqst, void *data)
+#ifdef CONFIG_SND_GENERIC_PM
+/*
+ * use platform_device for generic power-management without a proper bus
+ * (e.g. ISA)
+ */
+struct snd_generic_device {
+ struct platform_device pdev;
+ snd_card_t *card;
+};
+
+#define get_snd_generic_card(dev) container_of(to_platform_device(dev), struct snd_generic_device, pdev)->card
+
+#define SND_GENERIC_NAME "snd_generic_pm"
+
+static int snd_generic_suspend(struct device *dev, pm_message_t state, u32 level);
+static int snd_generic_resume(struct device *dev, u32 level);
+
+static struct device_driver snd_generic_driver = {
+ .name = SND_GENERIC_NAME,
+ .bus = &platform_bus_type,
+ .suspend = snd_generic_suspend,
+ .resume = snd_generic_resume,
+};
+
+static int generic_driver_registered;
+
+static void generic_driver_unregister(void)
+{
+ if (generic_driver_registered) {
+ generic_driver_registered--;
+ if (! generic_driver_registered)
+ driver_unregister(&snd_generic_driver);
+ }
+}
+
+static struct snd_generic_device *snd_generic_device_register(snd_card_t *card)
{
- snd_card_t *card = dev->data;
+ struct snd_generic_device *dev;
- switch (rqst) {
- case PM_SUSPEND:
- if (card->power_state == SNDRV_CTL_POWER_D3hot)
- break;
- /* FIXME: the correct state value? */
- card->pm_suspend(card, 0);
- snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
- break;
- case PM_RESUME:
- if (card->power_state == SNDRV_CTL_POWER_D0)
- break;
- /* FIXME: the correct state value? */
- card->pm_resume(card, 0);
- snd_power_change_state(card, SNDRV_CTL_POWER_D0);
- break;
+ if (! generic_driver_registered) {
+ if (driver_register(&snd_generic_driver) < 0)
+ return NULL;
+ }
+ generic_driver_registered++;
+
+ dev = kcalloc(1, sizeof(*dev), GFP_KERNEL);
+ if (! dev) {
+ generic_driver_unregister();
+ return NULL;
}
+
+ dev->pdev.name = SND_GENERIC_NAME;
+ dev->pdev.id = card->number;
+ dev->card = card;
+ if (platform_device_register(&dev->pdev) < 0) {
+ kfree(dev);
+ generic_driver_unregister();
+ return NULL;
+ }
+ return dev;
+}
+
+static void snd_generic_device_unregister(struct snd_generic_device *dev)
+{
+ platform_device_unregister(&dev->pdev);
+ kfree(dev);
+ generic_driver_unregister();
+}
+
+/* suspend/resume callbacks for snd_generic platform device */
+static int snd_generic_suspend(struct device *dev, pm_message_t state, u32 level)
+{
+ snd_card_t *card;
+
+ if (level != SUSPEND_DISABLE)
+ return 0;
+
+ card = get_snd_generic_card(dev);
+ if (card->power_state == SNDRV_CTL_POWER_D3hot)
+ return 0;
+ card->pm_suspend(card, PMSG_SUSPEND);
+ snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+ return 0;
+}
+
+static int snd_generic_resume(struct device *dev, u32 level)
+{
+ snd_card_t *card;
+
+ if (level != RESUME_ENABLE)
+ return 0;
+
+ card = get_snd_generic_card(dev);
+ if (card->power_state == SNDRV_CTL_POWER_D0)
+ return 0;
+ card->pm_resume(card);
+ snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
/**
- * snd_card_set_dev_pm_callback - set the generic power-management callbacks
+ * snd_card_set_generic_pm_callback - set the generic power-management callbacks
* @card: soundcard structure
- * @type: PM device type (PM_XXX)
* @suspend: suspend callback function
* @resume: resume callback function
* @private_data: private data to pass to the callback functions
*
* Registers the power-management and sets the lowlevel callbacks for
- * the given card with the given PM type. These callbacks are called
- * from the ALSA's common PM handler and from the control API.
+ * the given card. These callbacks are called from the ALSA's common
+ * PM handler and from the control API.
*/
-int snd_card_set_dev_pm_callback(snd_card_t *card, int type,
- int (*suspend)(snd_card_t *, unsigned int),
- int (*resume)(snd_card_t *, unsigned int),
+int snd_card_set_generic_pm_callback(snd_card_t *card,
+ int (*suspend)(snd_card_t *, pm_message_t),
+ int (*resume)(snd_card_t *),
void *private_data)
{
- card->pm_dev = pm_register(type, 0, snd_generic_pm_callback);
+ card->pm_dev = snd_generic_device_register(card);
if (! card->pm_dev)
return -ENOMEM;
- card->pm_dev->data = card;
snd_card_set_pm_callback(card, suspend, resume, private_data);
return 0;
}
+#endif /* CONFIG_SND_GENERIC_PM */
#ifdef CONFIG_PCI
-int snd_card_pci_suspend(struct pci_dev *dev, u32 state)
+int snd_card_pci_suspend(struct pci_dev *dev, pm_message_t state)
{
snd_card_t *card = pci_get_drvdata(dev);
int err;
return 0;
if (card->power_state == SNDRV_CTL_POWER_D3hot)
return 0;
- /* FIXME: correct state value? */
- err = card->pm_suspend(card, 0);
+ err = card->pm_suspend(card, PMSG_SUSPEND);
pci_save_state(dev);
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
return err;
return 0;
/* restore the PCI config space */
pci_restore_state(dev);
- /* FIXME: correct state value? */
- card->pm_resume(card, 0);
+ card->pm_resume(card);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
git://git.onelab.eu / linux-2.6.git / blobdiff