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Diffstat (limited to 'include/sound/core.h')
| -rw-r--r-- | include/sound/core.h | 459 |
1 files changed, 459 insertions, 0 deletions
diff --git a/include/sound/core.h b/include/sound/core.h new file mode 100644 index 00000000..1fa2407c --- /dev/null +++ b/include/sound/core.h @@ -0,0 +1,459 @@ +#ifndef __SOUND_CORE_H +#define __SOUND_CORE_H + +/* + * Main header file for the ALSA driver + * Copyright (c) 1994-2001 by Jaroslav Kysela <perex@perex.cz> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/module.h> +#include <linux/sched.h> /* wake_up() */ +#include <linux/mutex.h> /* struct mutex */ +#include <linux/rwsem.h> /* struct rw_semaphore */ +#include <linux/pm.h> /* pm_message_t */ +#include <linux/device.h> +#include <linux/stringify.h> + +/* number of supported soundcards */ +#ifdef CONFIG_SND_DYNAMIC_MINORS +#define SNDRV_CARDS 32 +#else +#define SNDRV_CARDS 8 /* don't change - minor numbers */ +#endif + +#define CONFIG_SND_MAJOR 116 /* standard configuration */ + +/* forward declarations */ +#ifdef CONFIG_PCI +struct pci_dev; +#endif + +/* device allocation stuff */ + +#define SNDRV_DEV_TYPE_RANGE_SIZE 0x1000 + +typedef int __bitwise snd_device_type_t; +#define SNDRV_DEV_TOPLEVEL ((__force snd_device_type_t) 0) +#define SNDRV_DEV_CONTROL ((__force snd_device_type_t) 1) +#define SNDRV_DEV_LOWLEVEL_PRE ((__force snd_device_type_t) 2) +#define SNDRV_DEV_LOWLEVEL_NORMAL ((__force snd_device_type_t) 0x1000) +#define SNDRV_DEV_PCM ((__force snd_device_type_t) 0x1001) +#define SNDRV_DEV_RAWMIDI ((__force snd_device_type_t) 0x1002) +#define SNDRV_DEV_TIMER ((__force snd_device_type_t) 0x1003) +#define SNDRV_DEV_SEQUENCER ((__force snd_device_type_t) 0x1004) +#define SNDRV_DEV_HWDEP ((__force snd_device_type_t) 0x1005) +#define SNDRV_DEV_INFO ((__force snd_device_type_t) 0x1006) +#define SNDRV_DEV_BUS ((__force snd_device_type_t) 0x1007) +#define SNDRV_DEV_CODEC ((__force snd_device_type_t) 0x1008) +#define SNDRV_DEV_JACK ((__force snd_device_type_t) 0x1009) +#define SNDRV_DEV_LOWLEVEL ((__force snd_device_type_t) 0x2000) + +typedef int __bitwise snd_device_state_t; +#define SNDRV_DEV_BUILD ((__force snd_device_state_t) 0) +#define SNDRV_DEV_REGISTERED ((__force snd_device_state_t) 1) +#define SNDRV_DEV_DISCONNECTED ((__force snd_device_state_t) 2) + +typedef int __bitwise snd_device_cmd_t; +#define SNDRV_DEV_CMD_PRE ((__force snd_device_cmd_t) 0) +#define SNDRV_DEV_CMD_NORMAL ((__force snd_device_cmd_t) 1) +#define SNDRV_DEV_CMD_POST ((__force snd_device_cmd_t) 2) + +struct snd_device; + +struct snd_device_ops { + int (*dev_free)(struct snd_device *dev); + int (*dev_register)(struct snd_device *dev); + int (*dev_disconnect)(struct snd_device *dev); +}; + +struct snd_device { + struct list_head list; /* list of registered devices */ + struct snd_card *card; /* card which holds this device */ + snd_device_state_t state; /* state of the device */ + snd_device_type_t type; /* device type */ + void *device_data; /* device structure */ + struct snd_device_ops *ops; /* operations */ +}; + +#define snd_device(n) list_entry(n, struct snd_device, list) + +/* main structure for soundcard */ + +struct snd_card { + int number; /* number of soundcard (index to + snd_cards) */ + + char id[16]; /* id string of this card */ + char driver[16]; /* driver name */ + char shortname[32]; /* short name of this soundcard */ + char longname[80]; /* name of this soundcard */ + char mixername[80]; /* mixer name */ + char components[128]; /* card components delimited with + space */ + struct module *module; /* top-level module */ + + void *private_data; /* private data for soundcard */ + void (*private_free) (struct snd_card *card); /* callback for freeing of + private data */ + struct list_head devices; /* devices */ + + unsigned int last_numid; /* last used numeric ID */ + struct rw_semaphore controls_rwsem; /* controls list lock */ + rwlock_t ctl_files_rwlock; /* ctl_files list lock */ + int controls_count; /* count of all controls */ + int user_ctl_count; /* count of all user controls */ + struct list_head controls; /* all controls for this card */ + struct list_head ctl_files; /* active control files */ + + struct snd_info_entry *proc_root; /* root for soundcard specific files */ + struct snd_info_entry *proc_id; /* the card id */ + struct proc_dir_entry *proc_root_link; /* number link to real id */ + + struct list_head files_list; /* all files associated to this card */ + struct snd_shutdown_f_ops *s_f_ops; /* file operations in the shutdown + state */ + spinlock_t files_lock; /* lock the files for this card */ + int shutdown; /* this card is going down */ + int free_on_last_close; /* free in context of file_release */ + wait_queue_head_t shutdown_sleep; + struct device *dev; /* device assigned to this card */ + struct device *card_dev; /* cardX object for sysfs */ + +#ifdef CONFIG_PM + unsigned int power_state; /* power state */ + struct mutex power_lock; /* power lock */ + wait_queue_head_t power_sleep; +#endif + +#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) + struct snd_mixer_oss *mixer_oss; + int mixer_oss_change_count; +#endif +}; + +#ifdef CONFIG_PM +static inline void snd_power_lock(struct snd_card *card) +{ + mutex_lock(&card->power_lock); +} + +static inline void snd_power_unlock(struct snd_card *card) +{ + mutex_unlock(&card->power_lock); +} + +static inline unsigned int snd_power_get_state(struct snd_card *card) +{ + return card->power_state; +} + +static inline void snd_power_change_state(struct snd_card *card, unsigned int state) +{ + card->power_state = state; + wake_up(&card->power_sleep); +} + +/* init.c */ +int snd_power_wait(struct snd_card *card, unsigned int power_state); + +#else /* ! CONFIG_PM */ + +#define snd_power_lock(card) do { (void)(card); } while (0) +#define snd_power_unlock(card) do { (void)(card); } while (0) +static inline int snd_power_wait(struct snd_card *card, unsigned int state) { return 0; } +#define snd_power_get_state(card) ({ (void)(card); SNDRV_CTL_POWER_D0; }) +#define snd_power_change_state(card, state) do { (void)(card); } while (0) + +#endif /* CONFIG_PM */ + +struct snd_minor { + int type; /* SNDRV_DEVICE_TYPE_XXX */ + int card; /* card number */ + int device; /* device number */ + const struct file_operations *f_ops; /* file operations */ + void *private_data; /* private data for f_ops->open */ + struct device *dev; /* device for sysfs */ +}; + +/* return a device pointer linked to each sound device as a parent */ +static inline struct device *snd_card_get_device_link(struct snd_card *card) +{ + return card ? card->card_dev : NULL; +} + +/* sound.c */ + +extern int snd_major; +extern int snd_ecards_limit; +extern struct class *sound_class; + +void snd_request_card(int card); + +int snd_register_device_for_dev(int type, struct snd_card *card, + int dev, + const struct file_operations *f_ops, + void *private_data, + const char *name, + struct device *device); + +/** + * 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 + * @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. + * The operators have to be set in reg parameter. + * + * This function uses the card's device pointer to link to the + * correct &struct device. + * + * Returns zero if successful, or a negative error code on failure. + */ +static inline int snd_register_device(int type, struct snd_card *card, int dev, + const struct file_operations *f_ops, + void *private_data, + const char *name) +{ + return snd_register_device_for_dev(type, card, dev, f_ops, + private_data, name, + snd_card_get_device_link(card)); +} + +int snd_unregister_device(int type, struct snd_card *card, int dev); +void *snd_lookup_minor_data(unsigned int minor, int type); +int snd_add_device_sysfs_file(int type, struct snd_card *card, int dev, + struct device_attribute *attr); + +#ifdef CONFIG_SND_OSSEMUL +int snd_register_oss_device(int type, struct snd_card *card, int dev, + const struct file_operations *f_ops, void *private_data, + const char *name); +int snd_unregister_oss_device(int type, struct snd_card *card, int dev); +void *snd_lookup_oss_minor_data(unsigned int minor, int type); +#endif + +int snd_minor_info_init(void); +int snd_minor_info_done(void); + +/* sound_oss.c */ + +#ifdef CONFIG_SND_OSSEMUL +int snd_minor_info_oss_init(void); +int snd_minor_info_oss_done(void); +#else +static inline int snd_minor_info_oss_init(void) { return 0; } +static inline int snd_minor_info_oss_done(void) { return 0; } +#endif + +/* memory.c */ + +int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count); +int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count); + +/* init.c */ + +extern struct snd_card *snd_cards[SNDRV_CARDS]; +int snd_card_locked(int card); +#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) +#define SND_MIXER_OSS_NOTIFY_REGISTER 0 +#define SND_MIXER_OSS_NOTIFY_DISCONNECT 1 +#define SND_MIXER_OSS_NOTIFY_FREE 2 +extern int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int cmd); +#endif + +int snd_card_create(int idx, const char *id, + struct module *module, int extra_size, + struct snd_card **card_ret); + +int snd_card_disconnect(struct snd_card *card); +int snd_card_free(struct snd_card *card); +int snd_card_free_when_closed(struct snd_card *card); +void snd_card_set_id(struct snd_card *card, const char *id); +int snd_card_register(struct snd_card *card); +int snd_card_info_init(void); +int snd_card_info_done(void); +int snd_component_add(struct snd_card *card, const char *component); +int snd_card_file_add(struct snd_card *card, struct file *file); +int snd_card_file_remove(struct snd_card *card, struct file *file); + +#define snd_card_set_dev(card, devptr) ((card)->dev = (devptr)) + +/* device.c */ + +int snd_device_new(struct snd_card *card, snd_device_type_t type, + void *device_data, struct snd_device_ops *ops); +int snd_device_register(struct snd_card *card, void *device_data); +int snd_device_register_all(struct snd_card *card); +int snd_device_disconnect(struct snd_card *card, void *device_data); +int snd_device_disconnect_all(struct snd_card *card); +int snd_device_free(struct snd_card *card, void *device_data); +int snd_device_free_all(struct snd_card *card, snd_device_cmd_t cmd); + +/* isadma.c */ + +#ifdef CONFIG_ISA_DMA_API +#define DMA_MODE_NO_ENABLE 0x0100 + +void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode); +void snd_dma_disable(unsigned long dma); +unsigned int snd_dma_pointer(unsigned long dma, unsigned int size); +#endif + +/* misc.c */ +struct resource; +void release_and_free_resource(struct resource *res); + +/* --- */ + +#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK) +void __snd_printk(unsigned int level, const char *file, int line, + const char *format, ...) + __attribute__ ((format (printf, 4, 5))); +#else +#define __snd_printk(level, file, line, format, args...) \ + printk(format, ##args) +#endif + +/** + * snd_printk - printk wrapper + * @fmt: format string + * + * Works like printk() but prints the file and the line of the caller + * when configured with CONFIG_SND_VERBOSE_PRINTK. + */ +#define snd_printk(fmt, args...) \ + __snd_printk(0, __FILE__, __LINE__, fmt, ##args) + +#ifdef CONFIG_SND_DEBUG +/** + * snd_printd - debug printk + * @fmt: format string + * + * Works like snd_printk() for debugging purposes. + * Ignored when CONFIG_SND_DEBUG is not set. + */ +#define snd_printd(fmt, args...) \ + __snd_printk(1, __FILE__, __LINE__, fmt, ##args) + +/** + * snd_BUG - give a BUG warning message and stack trace + * + * Calls WARN() if CONFIG_SND_DEBUG is set. + * Ignored when CONFIG_SND_DEBUG is not set. + */ +#define snd_BUG() WARN(1, "BUG?\n") + +/** + * snd_BUG_ON - debugging check macro + * @cond: condition to evaluate + * + * When CONFIG_SND_DEBUG is set, this macro evaluates the given condition, + * and call WARN() and returns the value if it's non-zero. + * + * When CONFIG_SND_DEBUG is not set, this just returns zero, and the given + * condition is ignored. + * + * NOTE: the argument won't be evaluated at all when CONFIG_SND_DEBUG=n. + * Thus, don't put any statement that influences on the code behavior, + * such as pre/post increment, to the argument of this macro. + * If you want to evaluate and give a warning, use standard WARN_ON(). + */ +#define snd_BUG_ON(cond) WARN((cond), "BUG? (%s)\n", __stringify(cond)) + +#else /* !CONFIG_SND_DEBUG */ + +#define snd_printd(fmt, args...) do { } while (0) +#define snd_BUG() do { } while (0) +static inline int __snd_bug_on(int cond) +{ + return 0; +} +#define snd_BUG_ON(cond) __snd_bug_on(0 && (cond)) /* always false */ + +#endif /* CONFIG_SND_DEBUG */ + +#ifdef CONFIG_SND_DEBUG_VERBOSE +/** + * snd_printdd - debug printk + * @format: format string + * + * Works like snd_printk() for debugging purposes. + * Ignored when CONFIG_SND_DEBUG_VERBOSE is not set. + */ +#define snd_printdd(format, args...) \ + __snd_printk(2, __FILE__, __LINE__, format, ##args) +#else +#define snd_printdd(format, args...) do { } while (0) +#endif + + +#define SNDRV_OSS_VERSION ((3<<16)|(8<<8)|(1<<4)|(0)) /* 3.8.1a */ + +/* for easier backward-porting */ +#if defined(CONFIG_GAMEPORT) || defined(CONFIG_GAMEPORT_MODULE) +#define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev)) +#define gameport_set_port_data(gp,r) ((gp)->port_data = (r)) +#define gameport_get_port_data(gp) (gp)->port_data +#endif + +/* PCI quirk list helper */ +struct snd_pci_quirk { + unsigned short subvendor; /* PCI subvendor ID */ + unsigned short subdevice; /* PCI subdevice ID */ + unsigned short subdevice_mask; /* bitmask to match */ + int value; /* value */ +#ifdef CONFIG_SND_DEBUG_VERBOSE + const char *name; /* name of the device (optional) */ +#endif +}; + +#define _SND_PCI_QUIRK_ID_MASK(vend, mask, dev) \ + .subvendor = (vend), .subdevice = (dev), .subdevice_mask = (mask) +#define _SND_PCI_QUIRK_ID(vend, dev) \ + _SND_PCI_QUIRK_ID_MASK(vend, 0xffff, dev) +#define SND_PCI_QUIRK_ID(vend,dev) {_SND_PCI_QUIRK_ID(vend, dev)} +#ifdef CONFIG_SND_DEBUG_VERBOSE +#define SND_PCI_QUIRK(vend,dev,xname,val) \ + {_SND_PCI_QUIRK_ID(vend, dev), .value = (val), .name = (xname)} +#define SND_PCI_QUIRK_VENDOR(vend, xname, val) \ + {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val), .name = (xname)} +#define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val) \ + {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), \ + .value = (val), .name = (xname)} +#else +#define SND_PCI_QUIRK(vend,dev,xname,val) \ + {_SND_PCI_QUIRK_ID(vend, dev), .value = (val)} +#define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val) \ + {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), .value = (val)} +#define SND_PCI_QUIRK_VENDOR(vend, xname, val) \ + {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val)} +#endif + +const struct snd_pci_quirk * +snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list); + +const struct snd_pci_quirk * +snd_pci_quirk_lookup_id(u16 vendor, u16 device, + const struct snd_pci_quirk *list); + +#endif /* __SOUND_CORE_H */ |