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
  30 /* Typedef's */
  31 typedef struct timespec snd_timestamp_t;
  32 typedef struct sndrv_interval snd_interval_t;
  33 typedef enum sndrv_card_type snd_card_type;
  34 typedef struct sndrv_xferi snd_xferi_t;
  35 typedef struct sndrv_xfern snd_xfern_t;
  36 typedef struct sndrv_xferv snd_xferv_t;
  37
  38 /* forward declarations */
  39 #ifdef CONFIG_PCI
  40 struct pci_dev;
  41 #endif
  42 #ifdef CONFIG_SBUS
  43 struct sbus_dev;
  44 #endif
  45
  46 /* device allocation stuff */
  47
  48 #define SNDRV_DEV_TYPE_RANGE_SIZE               0x1000
  49
  50 typedef enum {
  51         SNDRV_DEV_TOPLEVEL =            (0*SNDRV_DEV_TYPE_RANGE_SIZE),
  52         SNDRV_DEV_LOWLEVEL_PRE,
  53         SNDRV_DEV_LOWLEVEL_NORMAL =     (1*SNDRV_DEV_TYPE_RANGE_SIZE),
  54         SNDRV_DEV_PCM,
  55         SNDRV_DEV_RAWMIDI,
  56         SNDRV_DEV_TIMER,
  57         SNDRV_DEV_SEQUENCER,
  58         SNDRV_DEV_HWDEP,
  59         SNDRV_DEV_INFO,
  60         SNDRV_DEV_LOWLEVEL =            (2*SNDRV_DEV_TYPE_RANGE_SIZE)
  61 } snd_device_type_t;
  62
  63 typedef enum {
  64         SNDRV_DEV_BUILD,
  65         SNDRV_DEV_REGISTERED,
  66         SNDRV_DEV_DISCONNECTED
  67 } snd_device_state_t;
  68
  69 typedef enum {
  70         SNDRV_DEV_CMD_PRE = 0,
  71         SNDRV_DEV_CMD_NORMAL = 1,
  72         SNDRV_DEV_CMD_POST = 2
  73 } snd_device_cmd_t;
  74
  75 typedef struct _snd_card snd_card_t;
  76 typedef struct _snd_device snd_device_t;
  77
  78 typedef int (snd_dev_free_t)(snd_device_t *device);
  79 typedef int (snd_dev_register_t)(snd_device_t *device);
  80 typedef int (snd_dev_disconnect_t)(snd_device_t *device);
  81 typedef int (snd_dev_unregister_t)(snd_device_t *device);
  82
  83 typedef struct {
  84         snd_dev_free_t *dev_free;
  85         snd_dev_register_t *dev_register;
  86         snd_dev_disconnect_t *dev_disconnect;
  87         snd_dev_unregister_t *dev_unregister;
  88 } snd_device_ops_t;
  89
  90 struct _snd_device {
  91         struct list_head list;          /* list of registered devices */
  92         snd_card_t *card;               /* card which holds this device */
  93         snd_device_state_t state;       /* state of the device */
  94         snd_device_type_t type;         /* device type */
  95         void *device_data;              /* device structure */
  96         snd_device_ops_t *ops;          /* operations */
  97 };
  98
  99 #define snd_device(n) list_entry(n, snd_device_t, list)
 100
 101 /* various typedefs */
 102
 103 typedef struct snd_info_entry snd_info_entry_t;
 104 typedef struct _snd_pcm snd_pcm_t;
 105 typedef struct _snd_pcm_str snd_pcm_str_t;
 106 typedef struct _snd_pcm_substream snd_pcm_substream_t;
 107 typedef struct _snd_mixer snd_kmixer_t;
 108 typedef struct _snd_rawmidi snd_rawmidi_t;
 109 typedef struct _snd_ctl_file snd_ctl_file_t;
 110 typedef struct _snd_kcontrol snd_kcontrol_t;
 111 typedef struct _snd_timer snd_timer_t;
 112 typedef struct _snd_timer_instance snd_timer_instance_t;
 113 typedef struct _snd_hwdep snd_hwdep_t;
 114 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 115 typedef struct _snd_oss_mixer snd_mixer_oss_t;
 116 #endif
 117
 118 /* monitor files for graceful shutdown (hotplug) */
 119
 120 struct snd_monitor_file {
 121         struct file *file;
 122         struct snd_monitor_file *next;
 123 };
 124
 125 struct snd_shutdown_f_ops;      /* define it later */
 126
 127 /* main structure for soundcard */
 128
 129 struct _snd_card {
 130         int number;                     /* number of soundcard (index to snd_cards) */
 131
 132         char id[16];                    /* id string of this card */
 133         char driver[16];                /* driver name */
 134         char shortname[32];             /* short name of this soundcard */
 135         char longname[80];              /* name of this soundcard */
 136         char mixername[80];             /* mixer name */
 137         char components[80];            /* card components delimited with space */
 138
 139         struct module *module;          /* top-level module */
 140
 141         void *private_data;             /* private data for soundcard */
 142         void (*private_free) (snd_card_t *card); /* callback for freeing of private data */
 143
 144         struct list_head devices;       /* devices */
 145
 146         unsigned int last_numid;        /* last used numeric ID */
 147         struct rw_semaphore controls_rwsem;     /* controls list lock */
 148         rwlock_t ctl_files_rwlock;      /* ctl_files list lock */
 149         int controls_count;             /* count of all controls */
 150         struct list_head controls;      /* all controls for this card */
 151         struct list_head ctl_files;     /* active control files */
 152
 153         snd_info_entry_t *proc_root;    /* root for soundcard specific files */
 154         snd_info_entry_t *proc_id;      /* the card id */
 155         struct proc_dir_entry *proc_root_link;  /* number link to real id */
 156
 157         struct snd_monitor_file *files; /* all files associated to this card */
 158         struct snd_shutdown_f_ops *s_f_ops; /* file operations in the shutdown state */
 159         spinlock_t files_lock;          /* lock the files for this card */
 160         int shutdown;                   /* this card is going down */
 161         wait_queue_head_t shutdown_sleep;
 162         struct work_struct free_workq;  /* for free in workqueue */
 163         struct device *dev;
 164
 165 #ifdef CONFIG_PM
 166         int (*pm_suspend)(snd_card_t *card, unsigned int state);
 167         int (*pm_resume)(snd_card_t *card, unsigned int state);
 168         struct pm_dev *pm_dev;          /* for ISA */
 169         void *pm_private_data;
 170         unsigned int power_state;       /* power state */
 171         struct semaphore power_lock;    /* power lock */
 172         wait_queue_head_t power_sleep;
 173 #endif
 174
 175 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 176         snd_mixer_oss_t *mixer_oss;
 177         int mixer_oss_change_count;
 178 #endif
 179 };
 180
 181 #ifdef CONFIG_PM
 182 static inline void snd_power_lock(snd_card_t *card)
 183 {
 184         down(&card->power_lock);
 185 }
 186
 187 static inline void snd_power_unlock(snd_card_t *card)
 188 {
 189         up(&card->power_lock);
 190 }
 191
 192 int snd_power_wait(snd_card_t *card, unsigned int power_state, struct file *file);
 193
 194 static inline unsigned int snd_power_get_state(snd_card_t *card)
 195 {
 196         return card->power_state;
 197 }
 198
 199 static inline void snd_power_change_state(snd_card_t *card, unsigned int state)
 200 {
 201         card->power_state = state;
 202         wake_up(&card->power_sleep);
 203 }
 204 int snd_card_set_pm_callback(snd_card_t *card,
 205                              int (*suspend)(snd_card_t *, unsigned int),
 206                              int (*resume)(snd_card_t *, unsigned int),
 207                              void *private_data);
 208 int snd_card_set_dev_pm_callback(snd_card_t *card, int type,
 209                                  int (*suspend)(snd_card_t *, unsigned int),
 210                                  int (*resume)(snd_card_t *, unsigned int),
 211                                  void *private_data);
 212 #define snd_card_set_isa_pm_callback(card,suspend,resume,data) \
 213         snd_card_set_dev_pm_callback(card, PM_ISA_DEV, suspend, resume, data)
 214 #ifndef SND_PCI_PM_CALLBACKS
 215 int snd_card_pci_suspend(struct pci_dev *dev, u32 state);
 216 int snd_card_pci_resume(struct pci_dev *dev);
 217 #define SND_PCI_PM_CALLBACKS \
 218         .suspend = snd_card_pci_suspend,  .resume = snd_card_pci_resume
 219 #endif
 220 #else
 221 #define snd_power_lock(card)            do { (void)(card); } while (0)
 222 #define snd_power_unlock(card)          do { (void)(card); } while (0)
 223 static inline int snd_power_wait(snd_card_t *card, unsigned int state, struct file *file) { return 0; }
 224 #define snd_power_get_state(card)       SNDRV_CTL_POWER_D0
 225 #define snd_power_change_state(card, state)     do { (void)(card); } while (0)
 226 #define snd_card_set_pm_callback(card,suspend,resume,data) -EINVAL
 227 #define snd_card_set_dev_pm_callback(card,suspend,resume,data) -EINVAL
 228 #define snd_card_set_isa_pm_callback(card,suspend,resume,data) -EINVAL
 229 #define SND_PCI_PM_CALLBACKS
 230 #endif
 231
 232 /* device.c */
 233
 234 struct _snd_minor {
 235         struct list_head list;          /* list of all minors per card */
 236         int number;                     /* minor number */
 237         int device;                     /* device number */
 238         const char *comment;            /* for /proc/asound/devices */
 239         struct file_operations *f_ops;  /* file operations */
 240         char name[0];                   /* device name (keep at the end of structure) */
 241 };
 242
 243 typedef struct _snd_minor snd_minor_t;
 244
 245 /* sound.c */
 246
 247 extern int snd_ecards_limit;
 248
 249 void snd_request_card(int card);
 250
 251 int snd_register_device(int type, snd_card_t *card, int dev, snd_minor_t *reg, const char *name);
 252 int snd_unregister_device(int type, snd_card_t *card, int dev);
 253
 254 #ifdef CONFIG_SND_OSSEMUL
 255 int snd_register_oss_device(int type, snd_card_t *card, int dev, snd_minor_t *reg, const char *name);
 256 int snd_unregister_oss_device(int type, snd_card_t *card, int dev);
 257 #endif
 258
 259 int snd_minor_info_init(void);
 260 int snd_minor_info_done(void);
 261
 262 /* sound_oss.c */
 263
 264 #ifdef CONFIG_SND_OSSEMUL
 265 int snd_minor_info_oss_init(void);
 266 int snd_minor_info_oss_done(void);
 267 int snd_oss_init_module(void);
 268 #else
 269 #define snd_minor_info_oss_init() /*NOP*/
 270 #define snd_minor_info_oss_done() /*NOP*/
 271 #define snd_oss_init_module() /*NOP*/
 272 #endif
 273
 274 /* memory.c */
 275
 276 #ifdef CONFIG_SND_DEBUG_MEMORY
 277 void snd_memory_init(void);
 278 void snd_memory_done(void);
 279 int snd_memory_info_init(void);
 280 int snd_memory_info_done(void);
 281 void *snd_hidden_kmalloc(size_t size, int flags);
 282 void snd_hidden_kfree(const void *obj);
 283 void *snd_hidden_vmalloc(unsigned long size);
 284 void snd_hidden_vfree(void *obj);
 285 #define kmalloc(size, flags) snd_hidden_kmalloc(size, flags)
 286 #define kfree(obj) snd_hidden_kfree(obj)
 287 #define vmalloc(size) snd_hidden_vmalloc(size)
 288 #define vfree(obj) snd_hidden_vfree(obj)
 289 #define kmalloc_nocheck(size, flags) snd_wrapper_kmalloc(size, flags)
 290 #define vmalloc_nocheck(size) snd_wrapper_vmalloc(size)
 291 #define kfree_nocheck(obj) snd_wrapper_kfree(obj)
 292 #define vfree_nocheck(obj) snd_wrapper_vfree(obj)
 293 #else
 294 #define snd_memory_init() /*NOP*/
 295 #define snd_memory_done() /*NOP*/
 296 #define snd_memory_info_init() /*NOP*/
 297 #define snd_memory_info_done() /*NOP*/
 298 #define kmalloc_nocheck(size, flags) kmalloc(size, flags)
 299 #define vmalloc_nocheck(size) vmalloc(size)
 300 #define kfree_nocheck(obj) kfree(obj)
 301 #define vfree_nocheck(obj) vfree(obj)
 302 #endif
 303 void *snd_kcalloc(size_t size, int flags);
 304 char *snd_kmalloc_strdup(const char *string, int flags);
 305 int copy_to_user_fromio(void __user *dst, unsigned long src, size_t count);
 306 int copy_from_user_toio(unsigned long dst, const void __user *src, size_t count);
 307
 308 /* init.c */
 309
 310 extern int snd_cards_count;
 311 extern unsigned int snd_cards_lock;
 312 extern snd_card_t *snd_cards[SNDRV_CARDS];
 313 extern rwlock_t snd_card_rwlock;
 314 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 315 #define SND_MIXER_OSS_NOTIFY_REGISTER   0
 316 #define SND_MIXER_OSS_NOTIFY_DISCONNECT 1
 317 #define SND_MIXER_OSS_NOTIFY_FREE       2
 318 extern int (*snd_mixer_oss_notify_callback)(snd_card_t *card, int cmd);
 319 #endif
 320
 321 snd_card_t *snd_card_new(int idx, const char *id,
 322                          struct module *module, int extra_size);
 323 int snd_card_disconnect(snd_card_t *card);
 324 int snd_card_free(snd_card_t *card);
 325 int snd_card_free_in_thread(snd_card_t *card);
 326 int snd_card_register(snd_card_t *card);
 327 int snd_card_info_init(void);
 328 int snd_card_info_done(void);
 329 int snd_component_add(snd_card_t *card, const char *component);
 330 int snd_card_file_add(snd_card_t *card, struct file *file);
 331 int snd_card_file_remove(snd_card_t *card, struct file *file);
 332
 333 #ifndef snd_card_set_dev
 334 #define snd_card_set_dev(card,devptr) ((card)->dev = (devptr))
 335 #endif
 336
 337 /* device.c */
 338
 339 int snd_device_new(snd_card_t *card, snd_device_type_t type,
 340                    void *device_data, snd_device_ops_t *ops);
 341 int snd_device_register(snd_card_t *card, void *device_data);
 342 int snd_device_register_all(snd_card_t *card);
 343 int snd_device_disconnect(snd_card_t *card, void *device_data);
 344 int snd_device_disconnect_all(snd_card_t *card);
 345 int snd_device_free(snd_card_t *card, void *device_data);
 346 int snd_device_free_all(snd_card_t *card, snd_device_cmd_t cmd);
 347
 348 /* isadma.c */
 349
 350 #define DMA_MODE_NO_ENABLE      0x0100
 351
 352 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode);
 353 void snd_dma_disable(unsigned long dma);
 354 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size);
 355
 356 /* misc.c */
 357
 358 int snd_task_name(struct task_struct *task, char *name, size_t size);
 359 #ifdef CONFIG_SND_VERBOSE_PRINTK
 360 void snd_verbose_printk(const char *file, int line, const char *format, ...)
 361      __attribute__ ((format (printf, 3, 4)));
 362 #endif
 363 #if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK)
 364 void snd_verbose_printd(const char *file, int line, const char *format, ...)
 365      __attribute__ ((format (printf, 3, 4)));
 366 #endif
 367
 368 /* --- */
 369
 370 #ifdef CONFIG_SND_VERBOSE_PRINTK
 371 /**
 372  * snd_printk - printk wrapper
 373  * @fmt: format string
 374  *
 375  * Works like print() but prints the file and the line of the caller
 376  * when configured with CONFIG_SND_VERBOSE_PRINTK.
 377  */
 378 #define snd_printk(fmt, args...) \
 379         snd_verbose_printk(__FILE__, __LINE__, fmt ,##args)
 380 #else
 381 #define snd_printk(fmt, args...) \
 382         printk(fmt ,##args)
 383 #endif
 384
 385 #ifdef CONFIG_SND_DEBUG
 386
 387 #define __ASTRING__(x) #x
 388
 389 #ifdef CONFIG_SND_VERBOSE_PRINTK
 390 /**
 391  * snd_printd - debug printk
 392  * @format: format string
 393  *
 394  * Compiled only when Works like snd_printk() for debugging purpose.
 395  * Ignored when CONFIG_SND_DEBUG is not set.
 396  */
 397 #define snd_printd(fmt, args...) \
 398         snd_verbose_printd(__FILE__, __LINE__, fmt ,##args)
 399 #else
 400 #define snd_printd(fmt, args...) \
 401         printk(fmt ,##args)
 402 #endif
 403 /**
 404  * snd_assert - run-time assersion macro
 405  * @expr: expression
 406  * @args...: the action
 407  *
 408  * This macro checks the expression in run-time and invokes the commands
 409  * given in the rest arguments if the assertion is failed.
 410  * When CONFIG_SND_DEBUG is not set, the expression is executed but
 411  * not checked.
 412  */
 413 #define snd_assert(expr, args...) do {\
 414         if (!(expr)) {\
 415                 snd_printk("BUG? (%s) (called from %p)\n", __ASTRING__(expr), __builtin_return_address(0));\
 416                 args;\
 417         }\
 418 } while (0)
 419 /**
 420  * snd_runtime_check - run-time assersion macro
 421  * @expr: expression
 422  * @args...: the action
 423  *
 424  * This macro checks the expression in run-time and invokes the commands
 425  * given in the rest arguments if the assertion is failed.
 426  * Unlike snd_assert(), the action commands are executed even if
 427  * CONFIG_SND_DEBUG is not set but without any error messages.
 428  */
 429 #define snd_runtime_check(expr, args...) do {\
 430         if (!(expr)) {\
 431                 snd_printk("ERROR (%s) (called from %p)\n", __ASTRING__(expr), __builtin_return_address(0));\
 432                 args;\
 433         }\
 434 } while (0)
 435
 436 #else /* !CONFIG_SND_DEBUG */
 437
 438 #define snd_printd(fmt, args...)        /* nothing */
 439 #define snd_assert(expr, args...)       (void)(expr)
 440 #define snd_runtime_check(expr, args...) do { if (!(expr)) { args; } } while (0)
 441
 442 #endif /* CONFIG_SND_DEBUG */
 443
 444 #ifdef CONFIG_SND_DEBUG_DETECT
 445 /**
 446  * snd_printdd - debug printk
 447  * @format: format string
 448  *
 449  * Compiled only when Works like snd_printk() for debugging purpose.
 450  * Ignored when CONFIG_SND_DEBUG_DETECT is not set.
 451  */
 452 #define snd_printdd(format, args...) snd_printk(format, ##args)
 453 #else
 454 #define snd_printdd(format, args...) /* nothing */
 455 #endif
 456
 457 #define snd_BUG() snd_assert(0, )
 458
 459
 460 static inline void snd_timestamp_now(struct timespec *tstamp, int timespec)
 461 {
 462         struct timeval val;
 463         /* FIXME: use a linear time source */
 464         do_gettimeofday(&val);
 465         tstamp->tv_sec = val.tv_sec;
 466         tstamp->tv_nsec = val.tv_usec;
 467         if (timespec)
 468                 tstamp->tv_nsec *= 1000L;
 469 }
 470
 471 static inline void snd_timestamp_zero(struct timespec *tstamp)
 472 {
 473         tstamp->tv_sec = 0;
 474         tstamp->tv_nsec = 0;
 475 }
 476
 477 static inline int snd_timestamp_null(struct timespec *tstamp)
 478 {
 479         return tstamp->tv_sec == 0 && tstamp->tv_nsec == 0;
 480 }
 481
 482 #define SNDRV_OSS_VERSION         ((3<<16)|(8<<8)|(1<<4)|(0))   /* 3.8.1a */
 483
 484 #endif /* __SOUND_CORE_H */