include/sound/core.h

   1 #ifndef __SOUND_CORE_H
   2 #define __SOUND_CORE_H
   3
   4 /*
   5  *  Main header file for the ALSA driver
   6  *  Copyright (c) 1994-2001 by Jaroslav Kysela <perex@suse.cz>
   7  *
   8  *
   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.
  13  *
  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.
  18  *
  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
  22  *
  23  */
  24
  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 */
  30
  31 /* Typedef's */
  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;
  38
  39 /* forward declarations */
  40 #ifdef CONFIG_PCI
  41 struct pci_dev;
  42 #endif
  43 #ifdef CONFIG_SBUS
  44 struct sbus_dev;
  45 #endif
  46
  47 /* device allocation stuff */
  48
  49 #define SNDRV_DEV_TYPE_RANGE_SIZE               0x1000
  50
  51 typedef enum {
  52         SNDRV_DEV_TOPLEVEL =            (0*SNDRV_DEV_TYPE_RANGE_SIZE),
  53         SNDRV_DEV_CONTROL,
  54         SNDRV_DEV_LOWLEVEL_PRE,
  55         SNDRV_DEV_LOWLEVEL_NORMAL =     (1*SNDRV_DEV_TYPE_RANGE_SIZE),
  56         SNDRV_DEV_PCM,
  57         SNDRV_DEV_RAWMIDI,
  58         SNDRV_DEV_TIMER,
  59         SNDRV_DEV_SEQUENCER,
  60         SNDRV_DEV_HWDEP,
  61         SNDRV_DEV_INFO,
  62         SNDRV_DEV_BUS,
  63         SNDRV_DEV_CODEC,
  64         SNDRV_DEV_LOWLEVEL =            (2*SNDRV_DEV_TYPE_RANGE_SIZE)
  65 } snd_device_type_t;
  66
  67 typedef enum {
  68         SNDRV_DEV_BUILD,
  69         SNDRV_DEV_REGISTERED,
  70         SNDRV_DEV_DISCONNECTED
  71 } snd_device_state_t;
  72
  73 typedef enum {
  74         SNDRV_DEV_CMD_PRE = 0,
  75         SNDRV_DEV_CMD_NORMAL = 1,
  76         SNDRV_DEV_CMD_POST = 2
  77 } snd_device_cmd_t;
  78
  79 typedef struct _snd_card snd_card_t;
  80 typedef struct _snd_device snd_device_t;
  81
  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);
  86
  87 typedef struct {
  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;
  92 } snd_device_ops_t;
  93
  94 struct _snd_device {
  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 */
 101 };
 102
 103 #define snd_device(n) list_entry(n, snd_device_t, list)
 104
 105 /* various typedefs */
 106
 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;
 120 #endif
 121
 122 /* monitor files for graceful shutdown (hotplug) */
 123
 124 struct snd_monitor_file {
 125         struct file *file;
 126         struct snd_monitor_file *next;
 127 };
 128
 129 struct snd_shutdown_f_ops;      /* define it later in init.c */
 130
 131 /* main structure for soundcard */
 132
 133 struct _snd_card {
 134         int number;                     /* number of soundcard (index to
 135                                                                 snd_cards) */
 136
 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
 143                                                                 space */
 144         struct module *module;          /* top-level module */
 145
 146         void *private_data;             /* private data for soundcard */
 147         void (*private_free) (snd_card_t *card); /* callback for freeing of
 148                                                                 private data */
 149         struct list_head devices;       /* devices */
 150
 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 */
 158
 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 */
 162
 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
 165                                                                 state */
 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 */
 170         struct device *dev;
 171
 172 #ifdef CONFIG_PM
 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 */
 181 #endif
 182 #endif
 183
 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;
 187 #endif
 188 };
 189
 190 #ifdef CONFIG_PM
 191 static inline void snd_power_lock(snd_card_t *card)
 192 {
 193         down(&card->power_lock);
 194 }
 195
 196 static inline void snd_power_unlock(snd_card_t *card)
 197 {
 198         up(&card->power_lock);
 199 }
 200
 201 static inline unsigned int snd_power_get_state(snd_card_t *card)
 202 {
 203         return card->power_state;
 204 }
 205
 206 static inline void snd_power_change_state(snd_card_t *card, unsigned int state)
 207 {
 208         card->power_state = state;
 209         wake_up(&card->power_sleep);
 210 }
 211
 212 /* init.c */
 213 int snd_power_wait(snd_card_t *card, unsigned int power_state, struct file *file);
 214
 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 *),
 218                              void *private_data);
 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 *),
 222                                      void *private_data);
 223 #define snd_card_set_isa_pm_callback(card,suspend,resume,data) \
 224         snd_card_set_generic_pm_callback(card, suspend, resume, data)
 225 struct pci_dev;
 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
 230
 231 #else /* ! CONFIG_PM */
 232
 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
 242
 243 #endif /* CONFIG_PM */
 244
 245 struct _snd_minor {
 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
 252                                                                 structure) */
 253 };
 254
 255 typedef struct _snd_minor snd_minor_t;
 256
 257 /* sound.c */
 258
 259 extern int snd_ecards_limit;
 260
 261 void snd_request_card(int card);
 262
 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);
 265
 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);
 269 #endif
 270
 271 int snd_minor_info_init(void);
 272 int snd_minor_info_done(void);
 273
 274 /* sound_oss.c */
 275
 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);
 280 #else
 281 #define snd_minor_info_oss_init() /*NOP*/
 282 #define snd_minor_info_oss_done() /*NOP*/
 283 #define snd_oss_init_module() 0
 284 #endif
 285
 286 /* memory.c */
 287
 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)
 309 #else
 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)
 318 #endif
 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);
 321
 322 /* init.c */
 323
 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);
 332 #endif
 333
 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);
 345
 346 #ifndef snd_card_set_dev
 347 #define snd_card_set_dev(card,devptr) ((card)->dev = (devptr))
 348 #endif
 349
 350 /* device.c */
 351
 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);
 360
 361 /* isadma.c */
 362
 363 #define DMA_MODE_NO_ENABLE      0x0100
 364
 365 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode);
 366 void snd_dma_disable(unsigned long dma);
 367 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size);
 368
 369 /* misc.c */
 370
 371 int snd_task_name(struct task_struct *task, char *name, size_t size);
 372 #ifdef CONFIG_SND_VERBOSE_PRINTK
 373 void snd_verbose_printk(const char *file, int line, const char *format, ...)
 374      __attribute__ ((format (printf, 3, 4)));
 375 #endif
 376 #if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK)
 377 void snd_verbose_printd(const char *file, int line, const char *format, ...)
 378      __attribute__ ((format (printf, 3, 4)));
 379 #endif
 380
 381 /* --- */
 382
 383 #ifdef CONFIG_SND_VERBOSE_PRINTK
 384 /**
 385  * snd_printk - printk wrapper
 386  * @fmt: format string
 387  *
 388  * Works like print() but prints the file and the line of the caller
 389  * when configured with CONFIG_SND_VERBOSE_PRINTK.
 390  */
 391 #define snd_printk(fmt, args...) \
 392         snd_verbose_printk(__FILE__, __LINE__, fmt ,##args)
 393 #else
 394 #define snd_printk(fmt, args...) \
 395         printk(fmt ,##args)
 396 #endif
 397
 398 #ifdef CONFIG_SND_DEBUG
 399
 400 #define __ASTRING__(x) #x
 401
 402 #ifdef CONFIG_SND_VERBOSE_PRINTK
 403 /**
 404  * snd_printd - debug printk
 405  * @format: format string
 406  *
 407  * Compiled only when Works like snd_printk() for debugging purpose.
 408  * Ignored when CONFIG_SND_DEBUG is not set.
 409  */
 410 #define snd_printd(fmt, args...) \
 411         snd_verbose_printd(__FILE__, __LINE__, fmt ,##args)
 412 #else
 413 #define snd_printd(fmt, args...) \
 414         printk(fmt ,##args)
 415 #endif
 416 /**
 417  * snd_assert - run-time assertion macro
 418  * @expr: expression
 419  * @args...: the action
 420  *
 421  * This macro checks the expression in run-time and invokes the commands
 422  * given in the rest arguments if the assertion is failed.
 423  * When CONFIG_SND_DEBUG is not set, the expression is executed but
 424  * not checked.
 425  */
 426 #define snd_assert(expr, args...) do {\
 427         if (unlikely(!(expr))) {                                \
 428                 snd_printk(KERN_ERR "BUG? (%s) (called from %p)\n", __ASTRING__(expr), __builtin_return_address(0));\
 429                 args;\
 430         }\
 431 } while (0)
 432 /**
 433  * snd_runtime_check - run-time assertion macro
 434  * @expr: expression
 435  * @args...: the action
 436  *
 437  * This macro checks the expression in run-time and invokes the commands
 438  * given in the rest arguments if the assertion is failed.
 439  * Unlike snd_assert(), the action commands are executed even if
 440  * CONFIG_SND_DEBUG is not set but without any error messages.
 441  */
 442 #define snd_runtime_check(expr, args...) do {\
 443         if (unlikely(!(expr))) {                                \
 444                 snd_printk(KERN_ERR "ERROR (%s) (called from %p)\n", __ASTRING__(expr), __builtin_return_address(0));\
 445                 args;\
 446         }\
 447 } while (0)
 448
 449 #else /* !CONFIG_SND_DEBUG */
 450
 451 #define snd_printd(fmt, args...)        /* nothing */
 452 #define snd_assert(expr, args...)       (void)(expr)
 453 #define snd_runtime_check(expr, args...) do { if (!(expr)) { args; } } while (0)
 454
 455 #endif /* CONFIG_SND_DEBUG */
 456
 457 #ifdef CONFIG_SND_DEBUG_DETECT
 458 /**
 459  * snd_printdd - debug printk
 460  * @format: format string
 461  *
 462  * Compiled only when Works like snd_printk() for debugging purpose.
 463  * Ignored when CONFIG_SND_DEBUG_DETECT is not set.
 464  */
 465 #define snd_printdd(format, args...) snd_printk(format, ##args)
 466 #else
 467 #define snd_printdd(format, args...) /* nothing */
 468 #endif
 469
 470 #define snd_BUG() snd_assert(0, )
 471
 472
 473 static inline void snd_timestamp_now(struct timespec *tstamp, int timespec)
 474 {
 475         struct timeval val;
 476         /* FIXME: use a linear time source */
 477         do_gettimeofday(&val);
 478         tstamp->tv_sec = val.tv_sec;
 479         tstamp->tv_nsec = val.tv_usec;
 480         if (timespec)
 481                 tstamp->tv_nsec *= 1000L;
 482 }
 483
 484 static inline void snd_timestamp_zero(struct timespec *tstamp)
 485 {
 486         tstamp->tv_sec = 0;
 487         tstamp->tv_nsec = 0;
 488 }
 489
 490 static inline int snd_timestamp_null(struct timespec *tstamp)
 491 {
 492         return tstamp->tv_sec == 0 && tstamp->tv_nsec == 0;
 493 }
 494
 495 #define SNDRV_OSS_VERSION         ((3<<16)|(8<<8)|(1<<4)|(0))   /* 3.8.1a */
 496
 497 /* for easier backward-porting */
 498 #if defined(CONFIG_GAMEPORT) || defined(CONFIG_GAMEPORT_MODULE)
 499 #ifndef gameport_set_dev_parent
 500 #define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev))
 501 #define gameport_set_port_data(gp,r) ((gp)->port_data = (r))
 502 #define gameport_get_port_data(gp) (gp)->port_data
 503 #endif
 504 #endif
 505
 506 #endif /* __SOUND_CORE_H */