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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 <>
* 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
* 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 <linux/mutex.h> /* struct mutex */
#include <linux/rwsem.h> /* struct rw_semaphore */
#include <linux/workqueue.h> /* struct workqueue_struct */
#include <linux/pm.h> /* pm_message_t */
/* forward declarations */
struct pci_dev;
struct sbus_dev;
/* device allocation stuff */
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_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);
int (*dev_unregister)(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)
/* 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) (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 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
unsigned int power_state; /* power state */
struct mutex power_lock; /* power lock */
wait_queue_head_t power_sleep;
struct snd_mixer_oss *mixer_oss;
int mixer_oss_change_count;
#ifdef CONFIG_PM
static inline void snd_power_lock(struct snd_card *card)
static inline void snd_power_unlock(struct snd_card *card)
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;
/* 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) 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 */
char name[0]; /* device name (keep at the end of
structure) */
/* sound.c */
extern int snd_major;
extern int snd_ecards_limit;
void snd_request_card(int card);
int snd_register_device(int type, struct snd_card *card, int dev,
const struct file_operations *f_ops, void *private_data,
const char *name);
int snd_unregister_device(int type, struct snd_card *card, int dev);
void *snd_lookup_minor_data(unsigned int minor, int type);
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);
int snd_minor_info_init(void);
int snd_minor_info_done(void);
/* sound_oss.c */
int snd_minor_info_oss_init(void);
int snd_minor_info_oss_done(void);
#define snd_minor_info_oss_init() /*NOP*/
#define snd_minor_info_oss_done() /*NOP*/
/* 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 unsigned int snd_cards_lock;
extern struct snd_card *snd_cards[SNDRV_CARDS];
extern rwlock_t snd_card_rwlock;
extern int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int cmd);
struct snd_card *snd_card_new(int idx, const char *id,
struct module *module, int extra_size);
int snd_card_disconnect(struct snd_card *card);
int snd_card_free(struct snd_card *card);
int snd_card_free_in_thread(struct snd_card *card);
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);
#ifndef snd_card_set_dev
#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 */
#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);
/* misc.c */
struct resource;
void release_and_free_resource(struct resource *res);
void snd_verbose_printk(const char *file, int line, const char *format, ...)
__attribute__ ((format (printf, 3, 4)));
void snd_verbose_printd(const char *file, int line, const char *format, ...)
__attribute__ ((format (printf, 3, 4)));
/* --- */
* 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)
#define snd_printk(fmt, args...) \
printk(fmt ,##args)
#define __ASTRING__(x) #x
* snd_printd - debug printk
* @fmt: 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)
#define snd_printd(fmt, args...) \
printk(fmt ,##args)
* snd_assert - run-time assertion macro
* @expr: expression
* 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)\n", __ASTRING__(expr)); \
dump_stack(); \
args; \
} \
} while (0)
#define snd_BUG() do { \
snd_printk(KERN_ERR "BUG?\n"); \
dump_stack(); \
} while (0)
#else /* !CONFIG_SND_DEBUG */
#define snd_printd(fmt, args...) /* nothing */
#define snd_assert(expr, args...) (void)(expr)
#define snd_BUG() /* nothing */
#endif /* CONFIG_SND_DEBUG */
* 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)
#define snd_printdd(format, args...) /* nothing */
#define SNDRV_OSS_VERSION ((3<<16)|(8<<8)|(1<<4)|(0)) /* 3.8.1a */
/* for easier backward-porting */
#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
#include "typedefs.h"
#endif /* __SOUND_CORE_H */