diff options
Diffstat (limited to 'sound/core/init.c')
| -rw-r--r-- | sound/core/init.c | 185 |
1 files changed, 101 insertions, 84 deletions
diff --git a/sound/core/init.c b/sound/core/init.c index d72f58f450ce..c9c9929121d5 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -226,8 +226,10 @@ int snd_card_disconnect(snd_card_t * card) return 0; } -#if defined(CONFIG_PM) && defined(CONFIG_SND_GENERIC_PM) -static void snd_generic_device_unregister(struct snd_generic_device *dev); +#ifdef CONFIG_SND_GENERIC_DRIVER +static void snd_generic_device_unregister(snd_card_t *card); +#else +#define snd_generic_device_unregister(x) /*NOP*/ #endif /** @@ -253,14 +255,7 @@ int snd_card_free(snd_card_t * card) #ifdef CONFIG_PM wake_up(&card->power_sleep); -#ifdef CONFIG_SND_GENERIC_PM - if (card->pm_dev) { - snd_generic_device_unregister(card->pm_dev); - card->pm_dev = NULL; - } -#endif #endif - /* wait, until all devices are ready for the free operation */ wait_event(card->shutdown_sleep, card->files == NULL); @@ -288,6 +283,7 @@ int snd_card_free(snd_card_t * card) snd_printk(KERN_WARNING "unable to free card info\n"); /* Not fatal error */ } + snd_generic_device_unregister(card); while (card->s_f_ops) { s_f_ops = card->s_f_ops; card->s_f_ops = s_f_ops->next; @@ -665,6 +661,96 @@ int snd_card_file_remove(snd_card_t *card, struct file *file) return 0; } +#ifdef CONFIG_SND_GENERIC_DRIVER +/* + * generic device without a proper bus using platform_device + * (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" + +#ifdef CONFIG_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); +#endif + +/* initialized in sound.c */ +struct device_driver snd_generic_driver = { + .name = SND_GENERIC_NAME, + .bus = &platform_bus_type, +#ifdef CONFIG_PM + .suspend = snd_generic_suspend, + .resume = snd_generic_resume, +#endif +}; + +void snd_generic_device_release(struct device *dev) +{ +} + +static int snd_generic_device_register(snd_card_t *card) +{ + struct snd_generic_device *dev; + int err; + + if (card->generic_dev) + return 0; /* already registered */ + + dev = kcalloc(1, sizeof(*dev), GFP_KERNEL); + if (! dev) { + snd_printk(KERN_ERR "can't allocate generic_device\n"); + return -ENOMEM; + } + + dev->pdev.name = SND_GENERIC_NAME; + dev->pdev.id = card->number; + dev->pdev.dev.release = snd_generic_device_release; + dev->card = card; + if ((err = platform_device_register(&dev->pdev)) < 0) { + kfree(dev); + return err; + } + card->generic_dev = dev; + return 0; +} + +static void snd_generic_device_unregister(snd_card_t *card) +{ + struct snd_generic_device *dev = card->generic_dev; + if (dev) { + platform_device_unregister(&dev->pdev); + kfree(dev); + card->generic_dev = NULL; + } +} + +/** + * snd_card_set_generic_dev - assign the generic device to the card + * @card: soundcard structure + * + * Assigns a generic device to the card. This function is provided as the + * last resort, for devices without any proper bus. Thus this won't override + * the device already assigned to the card. + * + * Returns zero if successful, or a negative error code. + */ +int snd_card_set_generic_dev(snd_card_t *card) +{ + int err; + if ((err = snd_generic_device_register(card)) < 0) + return err; + if (! card->dev) + snd_card_set_dev(card, &card->generic_dev->pdev.dev); + return 0; +} +#endif /* CONFIG_SND_GENERIC_DRIVER */ + #ifdef CONFIG_PM /** * snd_power_wait - wait until the power-state is changed. @@ -730,75 +816,7 @@ int snd_card_set_pm_callback(snd_card_t *card, return 0; } -#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) -{ - struct snd_generic_device *dev; - - 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(); -} - +#ifdef CONFIG_SND_GENERIC_DRIVER /* suspend/resume callbacks for snd_generic platform device */ static int snd_generic_suspend(struct device *dev, pm_message_t state, u32 level) { @@ -846,13 +864,12 @@ int snd_card_set_generic_pm_callback(snd_card_t *card, int (*resume)(snd_card_t *), void *private_data) { - card->pm_dev = snd_generic_device_register(card); - if (! card->pm_dev) - return -ENOMEM; - snd_card_set_pm_callback(card, suspend, resume, private_data); - return 0; + int err; + if ((err = snd_generic_device_register(card)) < 0) + return err; + return snd_card_set_pm_callback(card, suspend, resume, private_data); } -#endif /* CONFIG_SND_GENERIC_PM */ +#endif /* CONFIG_SND_GENERIC_DRIVER */ #ifdef CONFIG_PCI int snd_card_pci_suspend(struct pci_dev *dev, pm_message_t state) |