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linux/include/sound/core.h

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#ifndef __SOUND_CORE_H
#define __SOUND_CORE_H
/*
* Main header file for the ALSA driver
* Copyright (c) 1994-2001 by Jaroslav Kysela <perex@suse.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/sched.h> /* wake_up() */
#include <asm/semaphore.h> /* struct semaphore */
#include <linux/rwsem.h> /* struct rw_semaphore */
#include <linux/workqueue.h> /* struct workqueue_struct */
#include <linux/pm.h> /* pm_message_t */
/* Typedef's */
typedef struct timespec snd_timestamp_t;
typedef struct sndrv_interval snd_interval_t;
typedef enum sndrv_card_type snd_card_type;
typedef struct sndrv_xferi snd_xferi_t;
typedef struct sndrv_xfern snd_xfern_t;
typedef struct sndrv_xferv snd_xferv_t;
/* forward declarations */
#ifdef CONFIG_PCI
struct pci_dev;
#endif
#ifdef CONFIG_SBUS
struct sbus_dev;
#endif
/* device allocation stuff */
#define SNDRV_DEV_TYPE_RANGE_SIZE 0x1000
typedef enum {
SNDRV_DEV_TOPLEVEL = (0*SNDRV_DEV_TYPE_RANGE_SIZE),
SNDRV_DEV_CONTROL,
SNDRV_DEV_LOWLEVEL_PRE,
SNDRV_DEV_LOWLEVEL_NORMAL = (1*SNDRV_DEV_TYPE_RANGE_SIZE),
SNDRV_DEV_PCM,
SNDRV_DEV_RAWMIDI,
SNDRV_DEV_TIMER,
SNDRV_DEV_SEQUENCER,
SNDRV_DEV_HWDEP,
SNDRV_DEV_INFO,
SNDRV_DEV_BUS,
SNDRV_DEV_CODEC,
SNDRV_DEV_LOWLEVEL = (2*SNDRV_DEV_TYPE_RANGE_SIZE)
} snd_device_type_t;
typedef enum {
SNDRV_DEV_BUILD,
SNDRV_DEV_REGISTERED,
SNDRV_DEV_DISCONNECTED
} snd_device_state_t;
typedef enum {
SNDRV_DEV_CMD_PRE = 0,
SNDRV_DEV_CMD_NORMAL = 1,
SNDRV_DEV_CMD_POST = 2
} snd_device_cmd_t;
typedef struct _snd_card snd_card_t;
typedef struct _snd_device snd_device_t;
typedef int (snd_dev_free_t)(snd_device_t *device);
typedef int (snd_dev_register_t)(snd_device_t *device);
typedef int (snd_dev_disconnect_t)(snd_device_t *device);
typedef int (snd_dev_unregister_t)(snd_device_t *device);
typedef struct {
snd_dev_free_t *dev_free;
snd_dev_register_t *dev_register;
snd_dev_disconnect_t *dev_disconnect;
snd_dev_unregister_t *dev_unregister;
} snd_device_ops_t;
struct _snd_device {
struct list_head list; /* list of registered devices */
snd_card_t *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 */
snd_device_ops_t *ops; /* operations */
};
#define snd_device(n) list_entry(n, snd_device_t, list)
/* various typedefs */
typedef struct snd_info_entry snd_info_entry_t;
typedef struct _snd_pcm snd_pcm_t;
typedef struct _snd_pcm_str snd_pcm_str_t;
typedef struct _snd_pcm_substream snd_pcm_substream_t;
typedef struct _snd_mixer snd_kmixer_t;
typedef struct _snd_rawmidi snd_rawmidi_t;
typedef struct _snd_ctl_file snd_ctl_file_t;
typedef struct _snd_kcontrol snd_kcontrol_t;
typedef struct _snd_timer snd_timer_t;
typedef struct _snd_timer_instance snd_timer_instance_t;
typedef struct _snd_hwdep snd_hwdep_t;
#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
typedef struct _snd_oss_mixer snd_mixer_oss_t;
#endif
/* monitor files for graceful shutdown (hotplug) */
struct snd_monitor_file {
struct file *file;
struct snd_monitor_file *next;
};
struct snd_shutdown_f_ops; /* define it later in init.c */
/* 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[80]; /* card components delimited with
space */
struct module *module; /* top-level module */
void *private_data; /* private data for soundcard */
void (*private_free) (snd_card_t *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 */
snd_info_entry_t *proc_root; /* root for soundcard specific files */
snd_info_entry_t *proc_id; /* the card id */
struct proc_dir_entry *proc_root_link; /* number link to real id */
struct snd_monitor_file *files; /* 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 */
wait_queue_head_t shutdown_sleep;
struct work_struct free_workq; /* for free in workqueue */
struct device *dev;
#ifdef CONFIG_PM
int (*pm_suspend)(snd_card_t *card, pm_message_t state);
int (*pm_resume)(snd_card_t *card);
void *pm_private_data;
unsigned int power_state; /* power state */
struct semaphore power_lock; /* power lock */
wait_queue_head_t power_sleep;
#ifdef CONFIG_SND_GENERIC_PM
struct snd_generic_device *pm_dev; /* for ISA */
#endif
#endif
#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
snd_mixer_oss_t *mixer_oss;
int mixer_oss_change_count;
#endif
};
#ifdef CONFIG_PM
static inline void snd_power_lock(snd_card_t *card)
{
down(&card->power_lock);
}
static inline void snd_power_unlock(snd_card_t *card)
{
up(&card->power_lock);
}
static inline unsigned int snd_power_get_state(snd_card_t *card)
{
return card->power_state;
}
static inline void snd_power_change_state(snd_card_t *card, unsigned int state)
{
card->power_state = state;
wake_up(&card->power_sleep);
}
/* init.c */
int snd_power_wait(snd_card_t *card, unsigned int power_state, struct file *file);
int snd_card_set_pm_callback(snd_card_t *card,
int (*suspend)(snd_card_t *, pm_message_t),
int (*resume)(snd_card_t *),
void *private_data);
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);
#define snd_card_set_isa_pm_callback(card,suspend,resume,data) \
snd_card_set_generic_pm_callback(card, suspend, resume, data)
struct pci_dev;
int snd_card_pci_suspend(struct pci_dev *dev, pm_message_t state);
int snd_card_pci_resume(struct pci_dev *dev);
#define SND_PCI_PM_CALLBACKS \
.suspend = snd_card_pci_suspend, .resume = snd_card_pci_resume
#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(snd_card_t *card, unsigned int state, struct file *file) { return 0; }
#define snd_power_get_state(card) SNDRV_CTL_POWER_D0
#define snd_power_change_state(card, state) do { (void)(card); } while (0)
#define snd_card_set_pm_callback(card,suspend,resume,data)
#define snd_card_set_generic_pm_callback(card,suspend,resume,data)
#define snd_card_set_isa_pm_callback(card,suspend,resume,data)
#define SND_PCI_PM_CALLBACKS
#endif /* CONFIG_PM */
struct _snd_minor {
struct list_head list; /* list of all minors per card */
int number; /* minor number */
int device; /* device number */
const char *comment; /* for /proc/asound/devices */
struct file_operations *f_ops; /* file operations */
char name[0]; /* device name (keep at the end of
structure) */
};
typedef struct _snd_minor snd_minor_t;
/* sound.c */
extern int snd_ecards_limit;
void snd_request_card(int card);
int snd_register_device(int type, snd_card_t *card, int dev, snd_minor_t *reg, const char *name);
int snd_unregister_device(int type, snd_card_t *card, int dev);
#ifdef CONFIG_SND_OSSEMUL
int snd_register_oss_device(int type, snd_card_t *card, int dev, snd_minor_t *reg, const char *name);
int snd_unregister_oss_device(int type, snd_card_t *card, int dev);
#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);
int snd_oss_init_module(void);
#else
#define snd_minor_info_oss_init() /*NOP*/
#define snd_minor_info_oss_done() /*NOP*/
#define snd_oss_init_module() 0
#endif
/* memory.c */
#ifdef CONFIG_SND_DEBUG_MEMORY
void snd_memory_init(void);
void snd_memory_done(void);
int snd_memory_info_init(void);
int snd_memory_info_done(void);
void *snd_hidden_kmalloc(size_t size, unsigned int __nocast flags);
void *snd_hidden_kcalloc(size_t n, size_t size, unsigned int __nocast flags);
void snd_hidden_kfree(const void *obj);
void *snd_hidden_vmalloc(unsigned long size);
void snd_hidden_vfree(void *obj);
char *snd_hidden_kstrdup(const char *s, unsigned int __nocast flags);
#define kmalloc(size, flags) snd_hidden_kmalloc(size, flags)
#define kcalloc(n, size, flags) snd_hidden_kcalloc(n, size, flags)
#define kfree(obj) snd_hidden_kfree(obj)
#define vmalloc(size) snd_hidden_vmalloc(size)
#define vfree(obj) snd_hidden_vfree(obj)
#define kmalloc_nocheck(size, flags) snd_wrapper_kmalloc(size, flags)
#define vmalloc_nocheck(size) snd_wrapper_vmalloc(size)
#define kfree_nocheck(obj) snd_wrapper_kfree(obj)
#define vfree_nocheck(obj) snd_wrapper_vfree(obj)
#define kstrdup(s, flags) snd_hidden_kstrdup(s, flags)
#else
#define snd_memory_init() /*NOP*/
#define snd_memory_done() /*NOP*/
#define snd_memory_info_init() /*NOP*/
#define snd_memory_info_done() /*NOP*/
#define kmalloc_nocheck(size, flags) kmalloc(size, flags)
#define vmalloc_nocheck(size) vmalloc(size)
#define kfree_nocheck(obj) kfree(obj)
#define vfree_nocheck(obj) vfree(obj)
#endif
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 unsigned int snd_cards_lock;
extern snd_card_t *snd_cards[SNDRV_CARDS];
extern rwlock_t snd_card_rwlock;
#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)(snd_card_t *card, int cmd);
#endif
snd_card_t *snd_card_new(int idx, const char *id,
struct module *module, int extra_size);
int snd_card_disconnect(snd_card_t *card);
int snd_card_free(snd_card_t *card);
int snd_card_free_in_thread(snd_card_t *card);
int snd_card_register(snd_card_t *card);
int snd_card_info_init(void);
int snd_card_info_done(void);
int snd_component_add(snd_card_t *card, const char *component);
int snd_card_file_add(snd_card_t *card, struct file *file);
int snd_card_file_remove(snd_card_t *card, struct file *file);
#ifndef snd_card_set_dev
#define snd_card_set_dev(card,devptr) ((card)->dev = (devptr))
#endif
/* device.c */
int snd_device_new(snd_card_t *card, snd_device_type_t type,
void *device_data, snd_device_ops_t *ops);
int snd_device_register(snd_card_t *card, void *device_data);
int snd_device_register_all(snd_card_t *card);
int snd_device_disconnect(snd_card_t *card, void *device_data);
int snd_device_disconnect_all(snd_card_t *card);
int snd_device_free(snd_card_t *card, void *device_data);
int snd_device_free_all(snd_card_t *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 */
int snd_task_name(struct task_struct *task, char *name, size_t size);
#ifdef CONFIG_SND_VERBOSE_PRINTK
void snd_verbose_printk(const char *file, int line, const char *format, ...)
__attribute__ ((format (printf, 3, 4)));
#endif
#if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK)
void snd_verbose_printd(const char *file, int line, const char *format, ...)
__attribute__ ((format (printf, 3, 4)));
#endif
/* --- */
#ifdef CONFIG_SND_VERBOSE_PRINTK
/**
* snd_printk - printk wrapper
* @fmt: format string
*
* Works like print() but prints the file and the line of the caller
* when configured with CONFIG_SND_VERBOSE_PRINTK.
*/
#define snd_printk(fmt, args...) \
snd_verbose_printk(__FILE__, __LINE__, fmt ,##args)
#else
#define snd_printk(fmt, args...) \
printk(fmt ,##args)
#endif
#ifdef CONFIG_SND_DEBUG
#define __ASTRING__(x) #x
#ifdef CONFIG_SND_VERBOSE_PRINTK
/**
* snd_printd - debug printk
* @format: format string
*
* Compiled only when Works like snd_printk() for debugging purpose.
* Ignored when CONFIG_SND_DEBUG is not set.
*/
#define snd_printd(fmt, args...) \
snd_verbose_printd(__FILE__, __LINE__, fmt ,##args)
#else
#define snd_printd(fmt, args...) \
printk(fmt ,##args)
#endif
/**
* snd_assert - run-time assertion macro
* @expr: expression
* @args...: the action
*
* This macro checks the expression in run-time and invokes the commands
* given in the rest arguments if the assertion is failed.
* When CONFIG_SND_DEBUG is not set, the expression is executed but
* not checked.
*/
#define snd_assert(expr, args...) do {\
if (unlikely(!(expr))) { \
snd_printk(KERN_ERR "BUG? (%s) (called from %p)\n", __ASTRING__(expr), __builtin_return_address(0));\
args;\
}\
} while (0)
/**
* snd_runtime_check - run-time assertion macro
* @expr: expression
* @args...: the action
*
* This macro checks the expression in run-time and invokes the commands
* given in the rest arguments if the assertion is failed.
* Unlike snd_assert(), the action commands are executed even if
* CONFIG_SND_DEBUG is not set but without any error messages.
*/
#define snd_runtime_check(expr, args...) do {\
if (unlikely(!(expr))) { \
snd_printk(KERN_ERR "ERROR (%s) (called from %p)\n", __ASTRING__(expr), __builtin_return_address(0));\
args;\
}\
} while (0)
#else /* !CONFIG_SND_DEBUG */
#define snd_printd(fmt, args...) /* nothing */
#define snd_assert(expr, args...) (void)(expr)
#define snd_runtime_check(expr, args...) do { if (!(expr)) { args; } } while (0)
#endif /* CONFIG_SND_DEBUG */
#ifdef CONFIG_SND_DEBUG_DETECT
/**
* snd_printdd - debug printk
* @format: format string
*
* Compiled only when Works like snd_printk() for debugging purpose.
* Ignored when CONFIG_SND_DEBUG_DETECT is not set.
*/
#define snd_printdd(format, args...) snd_printk(format, ##args)
#else
#define snd_printdd(format, args...) /* nothing */
#endif
#define snd_BUG() snd_assert(0, )
static inline void snd_timestamp_now(struct timespec *tstamp, int timespec)
{
struct timeval val;
/* FIXME: use a linear time source */
do_gettimeofday(&val);
tstamp->tv_sec = val.tv_sec;
tstamp->tv_nsec = val.tv_usec;
if (timespec)
tstamp->tv_nsec *= 1000L;
}
static inline void snd_timestamp_zero(struct timespec *tstamp)
{
tstamp->tv_sec = 0;
tstamp->tv_nsec = 0;
}
static inline int snd_timestamp_null(struct timespec *tstamp)
{
return tstamp->tv_sec == 0 && tstamp->tv_nsec == 0;
}
#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)
#ifndef gameport_set_dev_parent
#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
#endif
#endif /* __SOUND_CORE_H */
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