5 * Main header file for the ALSA driver
6 * Copyright (c) 1994-2001 by Jaroslav Kysela <perex@suse.cz>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/sched.h> /* wake_up() */
26 #include <asm/semaphore.h> /* struct semaphore */
27 #include <linux/rwsem.h> /* struct rw_semaphore */
28 #include <linux/workqueue.h> /* struct workqueue_struct */
29 #include <linux/pm.h> /* pm_message_t */
32 typedef struct timespec snd_timestamp_t;
33 typedef struct sndrv_interval snd_interval_t;
34 typedef enum sndrv_card_type snd_card_type;
35 typedef struct sndrv_xferi snd_xferi_t;
36 typedef struct sndrv_xfern snd_xfern_t;
37 typedef struct sndrv_xferv snd_xferv_t;
39 /* forward declarations */
47 /* device allocation stuff */
49 #define SNDRV_DEV_TYPE_RANGE_SIZE 0x1000
52 SNDRV_DEV_TOPLEVEL = (0*SNDRV_DEV_TYPE_RANGE_SIZE),
54 SNDRV_DEV_LOWLEVEL_PRE,
55 SNDRV_DEV_LOWLEVEL_NORMAL = (1*SNDRV_DEV_TYPE_RANGE_SIZE),
64 SNDRV_DEV_LOWLEVEL = (2*SNDRV_DEV_TYPE_RANGE_SIZE)
70 SNDRV_DEV_DISCONNECTED
74 SNDRV_DEV_CMD_PRE = 0,
75 SNDRV_DEV_CMD_NORMAL = 1,
76 SNDRV_DEV_CMD_POST = 2
79 typedef struct _snd_card snd_card_t;
80 typedef struct _snd_device snd_device_t;
82 typedef int (snd_dev_free_t)(snd_device_t *device);
83 typedef int (snd_dev_register_t)(snd_device_t *device);
84 typedef int (snd_dev_disconnect_t)(snd_device_t *device);
85 typedef int (snd_dev_unregister_t)(snd_device_t *device);
88 snd_dev_free_t *dev_free;
89 snd_dev_register_t *dev_register;
90 snd_dev_disconnect_t *dev_disconnect;
91 snd_dev_unregister_t *dev_unregister;
95 struct list_head list; /* list of registered devices */
96 snd_card_t *card; /* card which holds this device */
97 snd_device_state_t state; /* state of the device */
98 snd_device_type_t type; /* device type */
99 void *device_data; /* device structure */
100 snd_device_ops_t *ops; /* operations */
103 #define snd_device(n) list_entry(n, snd_device_t, list)
105 /* various typedefs */
107 typedef struct snd_info_entry snd_info_entry_t;
108 typedef struct _snd_pcm snd_pcm_t;
109 typedef struct _snd_pcm_str snd_pcm_str_t;
110 typedef struct _snd_pcm_substream snd_pcm_substream_t;
111 typedef struct _snd_mixer snd_kmixer_t;
112 typedef struct _snd_rawmidi snd_rawmidi_t;
113 typedef struct _snd_ctl_file snd_ctl_file_t;
114 typedef struct _snd_kcontrol snd_kcontrol_t;
115 typedef struct _snd_timer snd_timer_t;
116 typedef struct _snd_timer_instance snd_timer_instance_t;
117 typedef struct _snd_hwdep snd_hwdep_t;
118 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
119 typedef struct _snd_oss_mixer snd_mixer_oss_t;
122 /* monitor files for graceful shutdown (hotplug) */
124 struct snd_monitor_file {
126 struct snd_monitor_file *next;
129 struct snd_shutdown_f_ops; /* define it later in init.c */
131 /* main structure for soundcard */
134 int number; /* number of soundcard (index to
137 char id[16]; /* id string of this card */
138 char driver[16]; /* driver name */
139 char shortname[32]; /* short name of this soundcard */
140 char longname[80]; /* name of this soundcard */
141 char mixername[80]; /* mixer name */
142 char components[80]; /* card components delimited with
144 struct module *module; /* top-level module */
146 void *private_data; /* private data for soundcard */
147 void (*private_free) (snd_card_t *card); /* callback for freeing of
149 struct list_head devices; /* devices */
151 unsigned int last_numid; /* last used numeric ID */
152 struct rw_semaphore controls_rwsem; /* controls list lock */
153 rwlock_t ctl_files_rwlock; /* ctl_files list lock */
154 int controls_count; /* count of all controls */
155 int user_ctl_count; /* count of all user controls */
156 struct list_head controls; /* all controls for this card */
157 struct list_head ctl_files; /* active control files */
159 snd_info_entry_t *proc_root; /* root for soundcard specific files */
160 snd_info_entry_t *proc_id; /* the card id */
161 struct proc_dir_entry *proc_root_link; /* number link to real id */
163 struct snd_monitor_file *files; /* all files associated to this card */
164 struct snd_shutdown_f_ops *s_f_ops; /* file operations in the shutdown
166 spinlock_t files_lock; /* lock the files for this card */
167 int shutdown; /* this card is going down */
168 wait_queue_head_t shutdown_sleep;
169 struct work_struct free_workq; /* for free in workqueue */
173 int (*pm_suspend)(snd_card_t *card, pm_message_t state);
174 int (*pm_resume)(snd_card_t *card);
175 void *pm_private_data;
176 unsigned int power_state; /* power state */
177 struct semaphore power_lock; /* power lock */
178 wait_queue_head_t power_sleep;
179 #ifdef CONFIG_SND_GENERIC_PM
180 struct snd_generic_device *pm_dev; /* for ISA */
184 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
185 snd_mixer_oss_t *mixer_oss;
186 int mixer_oss_change_count;
191 static inline void snd_power_lock(snd_card_t *card)
193 down(&card->power_lock);
196 static inline void snd_power_unlock(snd_card_t *card)
198 up(&card->power_lock);
201 static inline unsigned int snd_power_get_state(snd_card_t *card)
203 return card->power_state;
206 static inline void snd_power_change_state(snd_card_t *card, unsigned int state)
208 card->power_state = state;
209 wake_up(&card->power_sleep);
213 int snd_power_wait(snd_card_t *card, unsigned int power_state, struct file *file);
215 int snd_card_set_pm_callback(snd_card_t *card,
216 int (*suspend)(snd_card_t *, pm_message_t),
217 int (*resume)(snd_card_t *),
219 int snd_card_set_generic_pm_callback(snd_card_t *card,
220 int (*suspend)(snd_card_t *, pm_message_t),
221 int (*resume)(snd_card_t *),
223 #define snd_card_set_isa_pm_callback(card,suspend,resume,data) \
224 snd_card_set_generic_pm_callback(card, suspend, resume, data)
226 int snd_card_pci_suspend(struct pci_dev *dev, pm_message_t state);
227 int snd_card_pci_resume(struct pci_dev *dev);
228 #define SND_PCI_PM_CALLBACKS \
229 .suspend = snd_card_pci_suspend, .resume = snd_card_pci_resume
231 #else /* ! CONFIG_PM */
233 #define snd_power_lock(card) do { (void)(card); } while (0)
234 #define snd_power_unlock(card) do { (void)(card); } while (0)
235 static inline int snd_power_wait(snd_card_t *card, unsigned int state, struct file *file) { return 0; }
236 #define snd_power_get_state(card) SNDRV_CTL_POWER_D0
237 #define snd_power_change_state(card, state) do { (void)(card); } while (0)
238 #define snd_card_set_pm_callback(card,suspend,resume,data)
239 #define snd_card_set_generic_pm_callback(card,suspend,resume,data)
240 #define snd_card_set_isa_pm_callback(card,suspend,resume,data)
241 #define SND_PCI_PM_CALLBACKS
243 #endif /* CONFIG_PM */
246 struct list_head list; /* list of all minors per card */
247 int number; /* minor number */
248 int device; /* device number */
249 const char *comment; /* for /proc/asound/devices */
250 struct file_operations *f_ops; /* file operations */
251 char name[0]; /* device name (keep at the end of
255 typedef struct _snd_minor snd_minor_t;
259 extern int snd_ecards_limit;
261 void snd_request_card(int card);
263 int snd_register_device(int type, snd_card_t *card, int dev, snd_minor_t *reg, const char *name);
264 int snd_unregister_device(int type, snd_card_t *card, int dev);
266 #ifdef CONFIG_SND_OSSEMUL
267 int snd_register_oss_device(int type, snd_card_t *card, int dev, snd_minor_t *reg, const char *name);
268 int snd_unregister_oss_device(int type, snd_card_t *card, int dev);
271 int snd_minor_info_init(void);
272 int snd_minor_info_done(void);
276 #ifdef CONFIG_SND_OSSEMUL
277 int snd_minor_info_oss_init(void);
278 int snd_minor_info_oss_done(void);
279 int snd_oss_init_module(void);
281 #define snd_minor_info_oss_init() /*NOP*/
282 #define snd_minor_info_oss_done() /*NOP*/
283 #define snd_oss_init_module() 0
288 #ifdef CONFIG_SND_DEBUG_MEMORY
289 void snd_memory_init(void);
290 void snd_memory_done(void);
291 int snd_memory_info_init(void);
292 int snd_memory_info_done(void);
293 void *snd_hidden_kmalloc(size_t size, unsigned int __nocast flags);
294 void *snd_hidden_kcalloc(size_t n, size_t size, unsigned int __nocast flags);
295 void snd_hidden_kfree(const void *obj);
296 void *snd_hidden_vmalloc(unsigned long size);
297 void snd_hidden_vfree(void *obj);
298 char *snd_hidden_kstrdup(const char *s, unsigned int __nocast flags);
299 #define kmalloc(size, flags) snd_hidden_kmalloc(size, flags)
300 #define kcalloc(n, size, flags) snd_hidden_kcalloc(n, size, flags)
301 #define kfree(obj) snd_hidden_kfree(obj)
302 #define vmalloc(size) snd_hidden_vmalloc(size)
303 #define vfree(obj) snd_hidden_vfree(obj)
304 #define kmalloc_nocheck(size, flags) snd_wrapper_kmalloc(size, flags)
305 #define vmalloc_nocheck(size) snd_wrapper_vmalloc(size)
306 #define kfree_nocheck(obj) snd_wrapper_kfree(obj)
307 #define vfree_nocheck(obj) snd_wrapper_vfree(obj)
308 #define kstrdup(s, flags) snd_hidden_kstrdup(s, flags)
310 #define snd_memory_init() /*NOP*/
311 #define snd_memory_done() /*NOP*/
312 #define snd_memory_info_init() /*NOP*/
313 #define snd_memory_info_done() /*NOP*/
314 #define kmalloc_nocheck(size, flags) kmalloc(size, flags)
315 #define vmalloc_nocheck(size) vmalloc(size)
316 #define kfree_nocheck(obj) kfree(obj)
317 #define vfree_nocheck(obj) vfree(obj)
319 int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count);
320 int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count);
324 extern unsigned int snd_cards_lock;
325 extern snd_card_t *snd_cards[SNDRV_CARDS];
326 extern rwlock_t snd_card_rwlock;
327 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
328 #define SND_MIXER_OSS_NOTIFY_REGISTER 0
329 #define SND_MIXER_OSS_NOTIFY_DISCONNECT 1
330 #define SND_MIXER_OSS_NOTIFY_FREE 2
331 extern int (*snd_mixer_oss_notify_callback)(snd_card_t *card, int cmd);
334 snd_card_t *snd_card_new(int idx, const char *id,
335 struct module *module, int extra_size);
336 int snd_card_disconnect(snd_card_t *card);
337 int snd_card_free(snd_card_t *card);
338 int snd_card_free_in_thread(snd_card_t *card);
339 int snd_card_register(snd_card_t *card);
340 int snd_card_info_init(void);
341 int snd_card_info_done(void);
342 int snd_component_add(snd_card_t *card, const char *component);
343 int snd_card_file_add(snd_card_t *card, struct file *file);
344 int snd_card_file_remove(snd_card_t *card, struct file *file);
346 #ifndef snd_card_set_dev
347 #define snd_card_set_dev(card,devptr) ((card)->dev = (devptr))
352 int snd_device_new(snd_card_t *card, snd_device_type_t type,
353 void *device_data, snd_device_ops_t *ops);
354 int snd_device_register(snd_card_t *card, void *device_data);
355 int snd_device_register_all(snd_card_t *card);
356 int snd_device_disconnect(snd_card_t *card, void *device_data);
357 int snd_device_disconnect_all(snd_card_t *card);
358 int snd_device_free(snd_card_t *card, void *device_data);
359 int snd_device_free_all(snd_card_t *card, snd_device_cmd_t cmd);
363 #ifdef CONFIG_ISA_DMA_API
364 #define DMA_MODE_NO_ENABLE 0x0100
366 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode);
367 void snd_dma_disable(unsigned long dma);
368 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size);
373 int snd_task_name(struct task_struct *task, char *name, size_t size);
374 #ifdef CONFIG_SND_VERBOSE_PRINTK
375 void snd_verbose_printk(const char *file, int line, const char *format, ...)
376 __attribute__ ((format (printf, 3, 4)));
378 #if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK)
379 void snd_verbose_printd(const char *file, int line, const char *format, ...)
380 __attribute__ ((format (printf, 3, 4)));
385 #ifdef CONFIG_SND_VERBOSE_PRINTK
387 * snd_printk - printk wrapper
388 * @fmt: format string
390 * Works like print() but prints the file and the line of the caller
391 * when configured with CONFIG_SND_VERBOSE_PRINTK.
393 #define snd_printk(fmt, args...) \
394 snd_verbose_printk(__FILE__, __LINE__, fmt ,##args)
396 #define snd_printk(fmt, args...) \
400 #ifdef CONFIG_SND_DEBUG
402 #define __ASTRING__(x) #x
404 #ifdef CONFIG_SND_VERBOSE_PRINTK
406 * snd_printd - debug printk
407 * @format: format string
409 * Compiled only when Works like snd_printk() for debugging purpose.
410 * Ignored when CONFIG_SND_DEBUG is not set.
412 #define snd_printd(fmt, args...) \
413 snd_verbose_printd(__FILE__, __LINE__, fmt ,##args)
415 #define snd_printd(fmt, args...) \
419 * snd_assert - run-time assertion macro
421 * @args...: the action
423 * This macro checks the expression in run-time and invokes the commands
424 * given in the rest arguments if the assertion is failed.
425 * When CONFIG_SND_DEBUG is not set, the expression is executed but
428 #define snd_assert(expr, args...) do {\
429 if (unlikely(!(expr))) { \
430 snd_printk(KERN_ERR "BUG? (%s) (called from %p)\n", __ASTRING__(expr), __builtin_return_address(0));\
435 * snd_runtime_check - run-time assertion macro
437 * @args...: the action
439 * This macro checks the expression in run-time and invokes the commands
440 * given in the rest arguments if the assertion is failed.
441 * Unlike snd_assert(), the action commands are executed even if
442 * CONFIG_SND_DEBUG is not set but without any error messages.
444 #define snd_runtime_check(expr, args...) do {\
445 if (unlikely(!(expr))) { \
446 snd_printk(KERN_ERR "ERROR (%s) (called from %p)\n", __ASTRING__(expr), __builtin_return_address(0));\
451 #else /* !CONFIG_SND_DEBUG */
453 #define snd_printd(fmt, args...) /* nothing */
454 #define snd_assert(expr, args...) (void)(expr)
455 #define snd_runtime_check(expr, args...) do { if (!(expr)) { args; } } while (0)
457 #endif /* CONFIG_SND_DEBUG */
459 #ifdef CONFIG_SND_DEBUG_DETECT
461 * snd_printdd - debug printk
462 * @format: format string
464 * Compiled only when Works like snd_printk() for debugging purpose.
465 * Ignored when CONFIG_SND_DEBUG_DETECT is not set.
467 #define snd_printdd(format, args...) snd_printk(format, ##args)
469 #define snd_printdd(format, args...) /* nothing */
472 #define snd_BUG() snd_assert(0, )
475 static inline void snd_timestamp_now(struct timespec *tstamp, int timespec)
478 /* FIXME: use a linear time source */
479 do_gettimeofday(&val);
480 tstamp->tv_sec = val.tv_sec;
481 tstamp->tv_nsec = val.tv_usec;
483 tstamp->tv_nsec *= 1000L;
486 static inline void snd_timestamp_zero(struct timespec *tstamp)
492 static inline int snd_timestamp_null(struct timespec *tstamp)
494 return tstamp->tv_sec == 0 && tstamp->tv_nsec == 0;
497 #define SNDRV_OSS_VERSION ((3<<16)|(8<<8)|(1<<4)|(0)) /* 3.8.1a */
499 /* for easier backward-porting */
500 #if defined(CONFIG_GAMEPORT) || defined(CONFIG_GAMEPORT_MODULE)
501 #ifndef gameport_set_dev_parent
502 #define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev))
503 #define gameport_set_port_data(gp,r) ((gp)->port_data = (r))
504 #define gameport_get_port_data(gp) (gp)->port_data
508 #endif /* __SOUND_CORE_H */