diff options
author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2006-01-07 17:40:05 +0300 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-01-07 17:40:05 +0300 |
commit | 123656d4cc8c946f578ebd18c2050f5251720428 (patch) | |
tree | 3d5432eff034a3b9cfdc98b37e245abe5695342d /sound/core/sound.c | |
parent | a62c80e559809e6c7851ec04d30575e85ad6f6ed (diff) | |
parent | 0aec63e67c69545ca757a73a66f5dcf05fa484bf (diff) | |
download | linux-123656d4cc8c946f578ebd18c2050f5251720428.tar.xz |
Merge with Linus' kernel.
Diffstat (limited to 'sound/core/sound.c')
-rw-r--r-- | sound/core/sound.c | 238 |
1 files changed, 144 insertions, 94 deletions
diff --git a/sound/core/sound.c b/sound/core/sound.c index 6e7cad1e947e..a8eda02bcf1c 100644 --- a/sound/core/sound.c +++ b/sound/core/sound.c @@ -23,6 +23,7 @@ #include <linux/init.h> #include <linux/slab.h> #include <linux/time.h> +#include <linux/device.h> #include <linux/moduleparam.h> #include <sound/core.h> #include <sound/minors.h> @@ -32,7 +33,6 @@ #include <sound/initval.h> #include <linux/kmod.h> #include <linux/devfs_fs_kernel.h> -#include <linux/platform_device.h> #define SNDRV_OS_MINORS 256 @@ -60,8 +60,7 @@ MODULE_ALIAS_CHARDEV_MAJOR(CONFIG_SND_MAJOR); */ int snd_ecards_limit; -static struct list_head snd_minors_hash[SNDRV_CARDS]; - +static struct snd_minor *snd_minors[SNDRV_OS_MINORS]; static DECLARE_MUTEX(sound_mutex); extern struct class *sound_class; @@ -108,44 +107,61 @@ static void snd_request_other(int minor) #endif /* request_module support */ -static snd_minor_t *snd_minor_search(int minor) +/** + * snd_lookup_minor_data - get user data of a registered device + * @minor: the minor number + * @type: device type (SNDRV_DEVICE_TYPE_XXX) + * + * Checks that a minor device with the specified type is registered, and returns + * its user data pointer. + */ +void *snd_lookup_minor_data(unsigned int minor, int type) { - struct list_head *list; - snd_minor_t *mptr; + struct snd_minor *mreg; + void *private_data; - list_for_each(list, &snd_minors_hash[SNDRV_MINOR_CARD(minor)]) { - mptr = list_entry(list, snd_minor_t, list); - if (mptr->number == minor) - return mptr; - } - return NULL; + if (minor > ARRAY_SIZE(snd_minors)) + return NULL; + down(&sound_mutex); + mreg = snd_minors[minor]; + if (mreg && mreg->type == type) + private_data = mreg->private_data; + else + private_data = NULL; + up(&sound_mutex); + return private_data; } static int snd_open(struct inode *inode, struct file *file) { - int minor = iminor(inode); - int card = SNDRV_MINOR_CARD(minor); - int dev = SNDRV_MINOR_DEVICE(minor); - snd_minor_t *mptr = NULL; + unsigned int minor = iminor(inode); + struct snd_minor *mptr = NULL; struct file_operations *old_fops; int err = 0; - if (dev != SNDRV_MINOR_GLOBAL) { - if (snd_cards[card] == NULL) { + if (minor > ARRAY_SIZE(snd_minors)) + return -ENODEV; + mptr = snd_minors[minor]; + if (mptr == NULL) { #ifdef CONFIG_KMOD - snd_request_card(card); + int dev = SNDRV_MINOR_DEVICE(minor); + if (dev == SNDRV_MINOR_CONTROL) { + /* /dev/aloadC? */ + int card = SNDRV_MINOR_CARD(minor); if (snd_cards[card] == NULL) -#endif - return -ENODEV; - } - } else { -#ifdef CONFIG_KMOD - if ((mptr = snd_minor_search(minor)) == NULL) + snd_request_card(card); + } else if (dev == SNDRV_MINOR_GLOBAL) { + /* /dev/aloadSEQ */ snd_request_other(minor); + } +#ifndef CONFIG_SND_DYNAMIC_MINORS + /* /dev/snd/{controlC?,seq} */ + mptr = snd_minors[minor]; + if (mptr == NULL) #endif +#endif + return -ENODEV; } - if (mptr == NULL && (mptr = snd_minor_search(minor)) == NULL) - return -ENODEV; old_fops = file->f_op; file->f_op = fops_get(mptr->f_ops); if (file->f_op->open) @@ -164,7 +180,23 @@ static struct file_operations snd_fops = .open = snd_open }; -static int snd_kernel_minor(int type, snd_card_t * card, int dev) +#ifdef CONFIG_SND_DYNAMIC_MINORS +static int snd_find_free_minor(void) +{ + int minor; + + for (minor = 0; minor < ARRAY_SIZE(snd_minors); ++minor) { + /* skip minors still used statically for autoloading devices */ + if (SNDRV_MINOR_DEVICE(minor) == SNDRV_MINOR_CONTROL || + minor == SNDRV_MINOR_SEQUENCER) + continue; + if (!snd_minors[minor]) + return minor; + } + return -EBUSY; +} +#else +static int snd_kernel_minor(int type, struct snd_card *card, int dev) { int minor; @@ -190,13 +222,15 @@ static int snd_kernel_minor(int type, snd_card_t * card, int dev) snd_assert(minor >= 0 && minor < SNDRV_OS_MINORS, return -EINVAL); return minor; } +#endif /** * snd_register_device - Register the ALSA device file for the card * @type: the device type, SNDRV_DEVICE_TYPE_XXX * @card: the card instance * @dev: the device index - * @reg: the snd_minor_t record + * @f_ops: the file operations + * @private_data: user pointer for f_ops->open() * @name: the device file name * * Registers an ALSA device file for the given card. @@ -204,30 +238,39 @@ static int snd_kernel_minor(int type, snd_card_t * card, int dev) * * Retrurns zero if successful, or a negative error code on failure. */ -int snd_register_device(int type, snd_card_t * card, int dev, snd_minor_t * reg, const char *name) +int snd_register_device(int type, struct snd_card *card, int dev, + struct file_operations *f_ops, void *private_data, + const char *name) { - int minor = snd_kernel_minor(type, card, dev); - snd_minor_t *preg; + int minor; + struct snd_minor *preg; struct device *device = NULL; - if (minor < 0) - return minor; snd_assert(name, return -EINVAL); - preg = (snd_minor_t *)kmalloc(sizeof(snd_minor_t) + strlen(name) + 1, GFP_KERNEL); + preg = kmalloc(sizeof(struct snd_minor) + strlen(name) + 1, GFP_KERNEL); if (preg == NULL) return -ENOMEM; - *preg = *reg; - preg->number = minor; + preg->type = type; + preg->card = card ? card->number : -1; preg->device = dev; + preg->f_ops = f_ops; + preg->private_data = private_data; strcpy(preg->name, name); down(&sound_mutex); - if (snd_minor_search(minor)) { +#ifdef CONFIG_SND_DYNAMIC_MINORS + minor = snd_find_free_minor(); +#else + minor = snd_kernel_minor(type, card, dev); + if (minor >= 0 && snd_minors[minor]) + minor = -EBUSY; +#endif + if (minor < 0) { up(&sound_mutex); kfree(preg); - return -EBUSY; + return minor; } - list_add_tail(&preg->list, &snd_minors_hash[SNDRV_MINOR_CARD(minor)]); - if (strncmp(name, "controlC", 8) || card->number >= cards_limit) + snd_minors[minor] = preg; + if (type != SNDRV_DEVICE_TYPE_CONTROL || preg->card >= cards_limit) devfs_mk_cdev(MKDEV(major, minor), S_IFCHR | device_mode, "snd/%s", name); if (card) device = card->dev; @@ -248,61 +291,92 @@ int snd_register_device(int type, snd_card_t * card, int dev, snd_minor_t * reg, * * Returns zero if sucecessful, or a negative error code on failure */ -int snd_unregister_device(int type, snd_card_t * card, int dev) +int snd_unregister_device(int type, struct snd_card *card, int dev) { - int minor = snd_kernel_minor(type, card, dev); - snd_minor_t *mptr; + int cardnum, minor; + struct snd_minor *mptr; - if (minor < 0) - return minor; + cardnum = card ? card->number : -1; down(&sound_mutex); - if ((mptr = snd_minor_search(minor)) == NULL) { + for (minor = 0; minor < ARRAY_SIZE(snd_minors); ++minor) + if ((mptr = snd_minors[minor]) != NULL && + mptr->type == type && + mptr->card == cardnum && + mptr->device == dev) + break; + if (minor == ARRAY_SIZE(snd_minors)) { up(&sound_mutex); return -EINVAL; } - if (strncmp(mptr->name, "controlC", 8) || card->number >= cards_limit) /* created in sound.c */ + if (mptr->type != SNDRV_DEVICE_TYPE_CONTROL || + mptr->card >= cards_limit) /* created in sound.c */ devfs_remove("snd/%s", mptr->name); class_device_destroy(sound_class, MKDEV(major, minor)); - list_del(&mptr->list); + snd_minors[minor] = NULL; up(&sound_mutex); kfree(mptr); return 0; } +#ifdef CONFIG_PROC_FS /* * INFO PART */ -static snd_info_entry_t *snd_minor_info_entry = NULL; +static struct snd_info_entry *snd_minor_info_entry = NULL; + +static const char *snd_device_type_name(int type) +{ + switch (type) { + case SNDRV_DEVICE_TYPE_CONTROL: + return "control"; + case SNDRV_DEVICE_TYPE_HWDEP: + return "hardware dependent"; + case SNDRV_DEVICE_TYPE_RAWMIDI: + return "raw midi"; + case SNDRV_DEVICE_TYPE_PCM_PLAYBACK: + return "digital audio playback"; + case SNDRV_DEVICE_TYPE_PCM_CAPTURE: + return "digital audio capture"; + case SNDRV_DEVICE_TYPE_SEQUENCER: + return "sequencer"; + case SNDRV_DEVICE_TYPE_TIMER: + return "timer"; + default: + return "?"; + } +} -static void snd_minor_info_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer) +static void snd_minor_info_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { - int card, device; - struct list_head *list; - snd_minor_t *mptr; + int minor; + struct snd_minor *mptr; down(&sound_mutex); - for (card = 0; card < SNDRV_CARDS; card++) { - list_for_each(list, &snd_minors_hash[card]) { - mptr = list_entry(list, snd_minor_t, list); - if (SNDRV_MINOR_DEVICE(mptr->number) != SNDRV_MINOR_GLOBAL) { - if ((device = mptr->device) >= 0) - snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", mptr->number, card, device, mptr->comment); - else - snd_iprintf(buffer, "%3i: [%i] : %s\n", mptr->number, card, mptr->comment); - } else { - snd_iprintf(buffer, "%3i: : %s\n", mptr->number, mptr->comment); - } - } + for (minor = 0; minor < SNDRV_OS_MINORS; ++minor) { + if (!(mptr = snd_minors[minor])) + continue; + if (mptr->card >= 0) { + if (mptr->device >= 0) + snd_iprintf(buffer, "%3i: [%2i-%2i]: %s\n", + minor, mptr->card, mptr->device, + snd_device_type_name(mptr->type)); + else + snd_iprintf(buffer, "%3i: [%2i] : %s\n", + minor, mptr->card, + snd_device_type_name(mptr->type)); + } else + snd_iprintf(buffer, "%3i: : %s\n", minor, + snd_device_type_name(mptr->type)); } up(&sound_mutex); } int __init snd_minor_info_init(void) { - snd_info_entry_t *entry; + struct snd_info_entry *entry; entry = snd_info_create_module_entry(THIS_MODULE, "devices", NULL); if (entry) { @@ -323,27 +397,18 @@ int __exit snd_minor_info_done(void) snd_info_unregister(snd_minor_info_entry); return 0; } +#endif /* CONFIG_PROC_FS */ /* * INIT PART */ -#ifdef CONFIG_SND_GENERIC_DRIVER -extern struct platform_driver snd_generic_driver; -#endif - static int __init alsa_sound_init(void) { short controlnum; - int err; - int card; snd_major = major; snd_ecards_limit = cards_limit; - for (card = 0; card < SNDRV_CARDS; card++) - INIT_LIST_HEAD(&snd_minors_hash[card]); - if ((err = snd_oss_init_module()) < 0) - return err; devfs_mk_dir("snd"); if (register_chrdev(major, "alsa", &snd_fops)) { snd_printk(KERN_ERR "unable to register native major device number %d\n", major); @@ -356,9 +421,6 @@ static int __init alsa_sound_init(void) return -ENOMEM; } snd_info_minor_register(); -#ifdef CONFIG_SND_GENERIC_DRIVER - platform_driver_register(&snd_generic_driver); -#endif for (controlnum = 0; controlnum < cards_limit; controlnum++) devfs_mk_cdev(MKDEV(major, controlnum<<5), S_IFCHR | device_mode, "snd/controlC%d", controlnum); #ifndef MODULE @@ -374,9 +436,6 @@ static void __exit alsa_sound_exit(void) for (controlnum = 0; controlnum < cards_limit; controlnum++) devfs_remove("snd/controlC%d", controlnum); -#ifdef CONFIG_SND_GENERIC_DRIVER - platform_driver_unregister(&snd_generic_driver); -#endif snd_info_minor_unregister(); snd_info_done(); if (unregister_chrdev(major, "alsa") != 0) @@ -395,9 +454,11 @@ EXPORT_SYMBOL(snd_request_card); #endif EXPORT_SYMBOL(snd_register_device); EXPORT_SYMBOL(snd_unregister_device); +EXPORT_SYMBOL(snd_lookup_minor_data); #if defined(CONFIG_SND_OSSEMUL) EXPORT_SYMBOL(snd_register_oss_device); EXPORT_SYMBOL(snd_unregister_oss_device); +EXPORT_SYMBOL(snd_lookup_oss_minor_data); #endif /* memory.c */ EXPORT_SYMBOL(copy_to_user_fromio); @@ -415,19 +476,8 @@ EXPORT_SYMBOL(snd_card_register); EXPORT_SYMBOL(snd_component_add); EXPORT_SYMBOL(snd_card_file_add); EXPORT_SYMBOL(snd_card_file_remove); -#ifdef CONFIG_SND_GENERIC_DRIVER -EXPORT_SYMBOL(snd_card_set_generic_dev); -#endif #ifdef CONFIG_PM EXPORT_SYMBOL(snd_power_wait); -EXPORT_SYMBOL(snd_card_set_pm_callback); -#ifdef CONFIG_SND_GENERIC_DRIVER -EXPORT_SYMBOL(snd_card_set_generic_pm_callback); -#endif -#ifdef CONFIG_PCI -EXPORT_SYMBOL(snd_card_pci_suspend); -EXPORT_SYMBOL(snd_card_pci_resume); -#endif #endif /* device.c */ EXPORT_SYMBOL(snd_device_new); |