+
+/**
+ * snd_card_set_pm_callback - set the PCI power-management callbacks
+ * @card: soundcard structure
+ * @suspend: suspend callback function
+ * @resume: resume callback function
+ * @private_data: private data to pass to the callback functions
+ *
+ * Sets the power-management callback functions of the card.
+ * These callbacks are called from ALSA's common PCI suspend/resume
+ * 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),
+ void *private_data)
+{
+ card->pm_suspend = suspend;
+ card->pm_resume = resume;
+ card->pm_private_data = private_data;
+ return 0;
+}
+
+static int snd_generic_pm_callback(struct pm_dev *dev, pm_request_t rqst, void *data)
+{
+ snd_card_t *card = dev->data;
+
+ switch (rqst) {
+ case PM_SUSPEND:
+ /* FIXME: the correct state value? */
+ card->pm_suspend(card, 0);
+ break;
+ case PM_RESUME:
+ /* FIXME: the correct state value? */
+ card->pm_resume(card, 0);
+ break;
+ }
+ return 0;
+}
+
+/**
+ * snd_card_set_dev_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.
+ */
+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),
+ void *private_data)
+{
+ card->pm_dev = pm_register(type, 0, snd_generic_pm_callback);
+ if (! card->pm_dev)
+ return -ENOMEM;
+ card->pm_dev->data = card;
+ snd_card_set_pm_callback(card, suspend, resume, private_data);
+ return 0;
+}
+
+#ifdef CONFIG_PCI
+int snd_card_pci_suspend(struct pci_dev *dev, u32 state)
+{
+ snd_card_t *card = pci_get_drvdata(dev);
+ if (! card || ! card->pm_suspend)
+ return 0;
+ if (card->power_state == SNDRV_CTL_POWER_D3hot)
+ return 0;
+ /* FIXME: correct state value? */
+ return card->pm_suspend(card, 0);
+}
+
+int snd_card_pci_resume(struct pci_dev *dev)
+{
+ snd_card_t *card = pci_get_drvdata(dev);
+ if (! card || ! card->pm_resume)
+ return 0;
+ if (card->power_state == SNDRV_CTL_POWER_D0)
+ return 0;
+ /* FIXME: correct state value? */
+ return card->pm_resume(card, 0);
+}
+#endif
+