1#ifndef __SOUND_PCM_H 2#define __SOUND_PCM_H 3 4/* 5 * Digital Audio (PCM) abstract layer 6 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 7 * Abramo Bagnara <abramo@alsa-project.org> 8 * 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 * 24 */ 25 26#include <sound/asound.h> 27#include <sound/memalloc.h> 28#include <sound/minors.h> 29#include <linux/poll.h> 30#include <linux/mm.h> 31#include <linux/bitops.h> 32#include <linux/pm_qos_params.h> 33 34#define snd_pcm_substream_chip(substream) ((substream)->private_data) 35#define snd_pcm_chip(pcm) ((pcm)->private_data) 36 37#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 38#include "pcm_oss.h" 39#endif 40 41/* 42 * Hardware (lowlevel) section 43 */ 44 45struct snd_pcm_hardware { 46 unsigned int info; /* SNDRV_PCM_INFO_* */ 47 u64 formats; /* SNDRV_PCM_FMTBIT_* */ 48 unsigned int rates; /* SNDRV_PCM_RATE_* */ 49 unsigned int rate_min; /* min rate */ 50 unsigned int rate_max; /* max rate */ 51 unsigned int channels_min; /* min channels */ 52 unsigned int channels_max; /* max channels */ 53 size_t buffer_bytes_max; /* max buffer size */ 54 size_t period_bytes_min; /* min period size */ 55 size_t period_bytes_max; /* max period size */ 56 unsigned int periods_min; /* min # of periods */ 57 unsigned int periods_max; /* max # of periods */ 58 size_t fifo_size; /* fifo size in bytes */ 59}; 60 61struct snd_pcm_substream; 62 63struct snd_pcm_ops { 64 int (*open)(struct snd_pcm_substream *substream); 65 int (*close)(struct snd_pcm_substream *substream); 66 int (*ioctl)(struct snd_pcm_substream * substream, 67 unsigned int cmd, void *arg); 68 int (*hw_params)(struct snd_pcm_substream *substream, 69 struct snd_pcm_hw_params *params); 70 int (*hw_free)(struct snd_pcm_substream *substream); 71 int (*prepare)(struct snd_pcm_substream *substream); 72 int (*trigger)(struct snd_pcm_substream *substream, int cmd); 73 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); 74 int (*copy)(struct snd_pcm_substream *substream, int channel, 75 snd_pcm_uframes_t pos, 76 void __user *buf, snd_pcm_uframes_t count); 77 int (*silence)(struct snd_pcm_substream *substream, int channel, 78 snd_pcm_uframes_t pos, snd_pcm_uframes_t count); 79 struct page *(*page)(struct snd_pcm_substream *substream, 80 unsigned long offset); 81 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); 82 int (*ack)(struct snd_pcm_substream *substream); 83}; 84 85/* 86 * 87 */ 88 89#if defined(CONFIG_SND_DYNAMIC_MINORS) 90#define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2) 91#else 92#define SNDRV_PCM_DEVICES 8 93#endif 94 95#define SNDRV_PCM_IOCTL1_FALSE ((void *)0) 96#define SNDRV_PCM_IOCTL1_TRUE ((void *)1) 97 98#define SNDRV_PCM_IOCTL1_RESET 0 99#define SNDRV_PCM_IOCTL1_INFO 1 100#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 101#define SNDRV_PCM_IOCTL1_GSTATE 3 102#define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 103 104#define SNDRV_PCM_TRIGGER_STOP 0 105#define SNDRV_PCM_TRIGGER_START 1 106#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 107#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 108#define SNDRV_PCM_TRIGGER_SUSPEND 5 109#define SNDRV_PCM_TRIGGER_RESUME 6 110 111#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) 112 113/* If you change this don't forget to change rates[] table in pcm_native.c */ 114#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ 115#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ 116#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ 117#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ 118#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ 119#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ 120#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ 121#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ 122#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ 123#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ 124#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ 125#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ 126#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ 127 128#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ 129#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ 130 131#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ 132 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ 133 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) 134#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) 135#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ 136 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) 137#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ 138 SNDRV_PCM_RATE_192000) 139#define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8) 140#define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8) 141#define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE) 142#define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE) 143#define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE) 144#define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE) 145#define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE) 146#define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE) 147#define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE) 148#define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE) 149#define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE) 150#define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE) 151#define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE) 152#define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE) 153#define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE) 154#define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE) 155#define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE) 156#define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE) 157#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE) 158#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE) 159#define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW) 160#define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW) 161#define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM) 162#define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG) 163#define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM) 164#define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL) 165#define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE) 166#define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE) 167#define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE) 168#define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE) 169#define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE) 170#define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE) 171#define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE) 172#define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE) 173#define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE) 174#define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE) 175#define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE) 176#define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE) 177#define SNDRV_PCM_FMTBIT_G723_24 (1ULL << SNDRV_PCM_FORMAT_G723_24) 178#define SNDRV_PCM_FMTBIT_G723_24_1B (1ULL << SNDRV_PCM_FORMAT_G723_24_1B) 179#define SNDRV_PCM_FMTBIT_G723_40 (1ULL << SNDRV_PCM_FORMAT_G723_40) 180#define SNDRV_PCM_FMTBIT_G723_40_1B (1ULL << SNDRV_PCM_FORMAT_G723_40_1B) 181 182#ifdef SNDRV_LITTLE_ENDIAN 183#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE 184#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE 185#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE 186#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE 187#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE 188#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE 189#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE 190#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE 191#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE 192#endif 193#ifdef SNDRV_BIG_ENDIAN 194#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE 195#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE 196#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE 197#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE 198#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE 199#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE 200#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE 201#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE 202#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE 203#endif 204 205struct snd_pcm_file { 206 struct snd_pcm_substream *substream; 207 int no_compat_mmap; 208}; 209 210struct snd_pcm_hw_rule; 211typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, 212 struct snd_pcm_hw_rule *rule); 213 214struct snd_pcm_hw_rule { 215 unsigned int cond; 216 snd_pcm_hw_rule_func_t func; 217 int var; 218 int deps[4]; 219 void *private; 220}; 221 222struct snd_pcm_hw_constraints { 223 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 224 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; 225 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - 226 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; 227 unsigned int rules_num; 228 unsigned int rules_all; 229 struct snd_pcm_hw_rule *rules; 230}; 231 232static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, 233 snd_pcm_hw_param_t var) 234{ 235 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 236} 237 238static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, 239 snd_pcm_hw_param_t var) 240{ 241 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 242} 243 244struct snd_ratnum { 245 unsigned int num; 246 unsigned int den_min, den_max, den_step; 247}; 248 249struct snd_ratden { 250 unsigned int num_min, num_max, num_step; 251 unsigned int den; 252}; 253 254struct snd_pcm_hw_constraint_ratnums { 255 int nrats; 256 struct snd_ratnum *rats; 257}; 258 259struct snd_pcm_hw_constraint_ratdens { 260 int nrats; 261 struct snd_ratden *rats; 262}; 263 264struct snd_pcm_hw_constraint_list { 265 unsigned int count; 266 unsigned int *list; 267 unsigned int mask; 268}; 269 270struct snd_pcm_hwptr_log; 271 272struct snd_pcm_runtime { 273 /* -- Status -- */ 274 struct snd_pcm_substream *trigger_master; 275 struct timespec trigger_tstamp; /* trigger timestamp */ 276 int overrange; 277 snd_pcm_uframes_t avail_max; 278 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ 279 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ 280 unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ 281 snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ 282 283 /* -- HW params -- */ 284 snd_pcm_access_t access; /* access mode */ 285 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ 286 snd_pcm_subformat_t subformat; /* subformat */ 287 unsigned int rate; /* rate in Hz */ 288 unsigned int channels; /* channels */ 289 snd_pcm_uframes_t period_size; /* period size */ 290 unsigned int periods; /* periods */ 291 snd_pcm_uframes_t buffer_size; /* buffer size */ 292 snd_pcm_uframes_t min_align; /* Min alignment for the format */ 293 size_t byte_align; 294 unsigned int frame_bits; 295 unsigned int sample_bits; 296 unsigned int info; 297 unsigned int rate_num; 298 unsigned int rate_den; 299 300 /* -- SW params -- */ 301 int tstamp_mode; /* mmap timestamp is updated */ 302 unsigned int period_step; 303 snd_pcm_uframes_t start_threshold; 304 snd_pcm_uframes_t stop_threshold; 305 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when 306 noise is nearest than this */ 307 snd_pcm_uframes_t silence_size; /* Silence filling size */ 308 snd_pcm_uframes_t boundary; /* pointers wrap point */ 309 310 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ 311 snd_pcm_uframes_t silence_filled; /* size filled with silence */ 312 313 union snd_pcm_sync_id sync; /* hardware synchronization ID */ 314 315 /* -- mmap -- */ 316 struct snd_pcm_mmap_status *status; 317 struct snd_pcm_mmap_control *control; 318 319 /* -- locking / scheduling -- */ 320 snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ 321 wait_queue_head_t sleep; /* poll sleep */ 322 wait_queue_head_t tsleep; /* transfer sleep */ 323 struct fasync_struct *fasync; 324 325 /* -- private section -- */ 326 void *private_data; 327 void (*private_free)(struct snd_pcm_runtime *runtime); 328 329 /* -- hardware description -- */ 330 struct snd_pcm_hardware hw; 331 struct snd_pcm_hw_constraints hw_constraints; 332 333 /* -- interrupt callbacks -- */ 334 void (*transfer_ack_begin)(struct snd_pcm_substream *substream); 335 void (*transfer_ack_end)(struct snd_pcm_substream *substream); 336 337 /* -- timer -- */ 338 unsigned int timer_resolution; /* timer resolution */ 339 int tstamp_type; /* timestamp type */ 340 341 /* -- DMA -- */ 342 unsigned char *dma_area; /* DMA area */ 343 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ 344 size_t dma_bytes; /* size of DMA area */ 345 346 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ 347 348#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 349 /* -- OSS things -- */ 350 struct snd_pcm_oss_runtime oss; 351#endif 352 353#ifdef CONFIG_SND_PCM_XRUN_DEBUG 354 struct snd_pcm_hwptr_log *hwptr_log; 355#endif 356}; 357 358struct snd_pcm_group { /* keep linked substreams */ 359 spinlock_t lock; 360 struct list_head substreams; 361 int count; 362}; 363 364struct pid; 365 366struct snd_pcm_substream { 367 struct snd_pcm *pcm; 368 struct snd_pcm_str *pstr; 369 void *private_data; /* copied from pcm->private_data */ 370 int number; 371 char name[32]; /* substream name */ 372 int stream; /* stream (direction) */ 373 struct pm_qos_request_list latency_pm_qos_req; /* pm_qos request */ 374 size_t buffer_bytes_max; /* limit ring buffer size */ 375 struct snd_dma_buffer dma_buffer; 376 unsigned int dma_buf_id; 377 size_t dma_max; 378 /* -- hardware operations -- */ 379 struct snd_pcm_ops *ops; 380 /* -- runtime information -- */ 381 struct snd_pcm_runtime *runtime; 382 /* -- timer section -- */ 383 struct snd_timer *timer; /* timer */ 384 unsigned timer_running: 1; /* time is running */ 385 /* -- next substream -- */ 386 struct snd_pcm_substream *next; 387 /* -- linked substreams -- */ 388 struct list_head link_list; /* linked list member */ 389 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ 390 struct snd_pcm_group *group; /* pointer to current group */ 391 /* -- assigned files -- */ 392 void *file; 393 int ref_count; 394 atomic_t mmap_count; 395 unsigned int f_flags; 396 void (*pcm_release)(struct snd_pcm_substream *); 397 struct pid *pid; 398#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 399 /* -- OSS things -- */ 400 struct snd_pcm_oss_substream oss; 401#endif 402#ifdef CONFIG_SND_VERBOSE_PROCFS 403 struct snd_info_entry *proc_root; 404 struct snd_info_entry *proc_info_entry; 405 struct snd_info_entry *proc_hw_params_entry; 406 struct snd_info_entry *proc_sw_params_entry; 407 struct snd_info_entry *proc_status_entry; 408 struct snd_info_entry *proc_prealloc_entry; 409 struct snd_info_entry *proc_prealloc_max_entry; 410#endif 411 /* misc flags */ 412 unsigned int hw_opened: 1; 413}; 414 415#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) 416 417 418struct snd_pcm_str { 419 int stream; /* stream (direction) */ 420 struct snd_pcm *pcm; 421 /* -- substreams -- */ 422 unsigned int substream_count; 423 unsigned int substream_opened; 424 struct snd_pcm_substream *substream; 425#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 426 /* -- OSS things -- */ 427 struct snd_pcm_oss_stream oss; 428#endif 429#ifdef CONFIG_SND_VERBOSE_PROCFS 430 struct snd_info_entry *proc_root; 431 struct snd_info_entry *proc_info_entry; 432#ifdef CONFIG_SND_PCM_XRUN_DEBUG 433 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ 434 struct snd_info_entry *proc_xrun_debug_entry; 435#endif 436#endif 437}; 438 439struct snd_pcm { 440 struct snd_card *card; 441 struct list_head list; 442 int device; /* device number */ 443 unsigned int info_flags; 444 unsigned short dev_class; 445 unsigned short dev_subclass; 446 char id[64]; 447 char name[80]; 448 struct snd_pcm_str streams[2]; 449 struct mutex open_mutex; 450 wait_queue_head_t open_wait; 451 void *private_data; 452 void (*private_free) (struct snd_pcm *pcm); 453 struct device *dev; /* actual hw device this belongs to */ 454#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 455 struct snd_pcm_oss oss; 456#endif 457}; 458 459struct snd_pcm_notify { 460 int (*n_register) (struct snd_pcm * pcm); 461 int (*n_disconnect) (struct snd_pcm * pcm); 462 int (*n_unregister) (struct snd_pcm * pcm); 463 struct list_head list; 464}; 465 466/* 467 * Registering 468 */ 469 470extern const struct file_operations snd_pcm_f_ops[2]; 471 472int snd_pcm_new(struct snd_card *card, const char *id, int device, 473 int playback_count, int capture_count, 474 struct snd_pcm **rpcm); 475int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); 476 477int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); 478 479/* 480 * Native I/O 481 */ 482 483extern rwlock_t snd_pcm_link_rwlock; 484 485int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); 486int snd_pcm_info_user(struct snd_pcm_substream *substream, 487 struct snd_pcm_info __user *info); 488int snd_pcm_status(struct snd_pcm_substream *substream, 489 struct snd_pcm_status *status); 490int snd_pcm_start(struct snd_pcm_substream *substream); 491int snd_pcm_stop(struct snd_pcm_substream *substream, int status); 492int snd_pcm_drain_done(struct snd_pcm_substream *substream); 493#ifdef CONFIG_PM 494int snd_pcm_suspend(struct snd_pcm_substream *substream); 495int snd_pcm_suspend_all(struct snd_pcm *pcm); 496#endif 497int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); 498int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, 499 struct snd_pcm_substream **rsubstream); 500void snd_pcm_release_substream(struct snd_pcm_substream *substream); 501int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, 502 struct snd_pcm_substream **rsubstream); 503void snd_pcm_detach_substream(struct snd_pcm_substream *substream); 504void snd_pcm_vma_notify_data(void *client, void *data); 505int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); 506 507/* 508 * PCM library 509 */ 510 511static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) 512{ 513 return substream->group != &substream->self_group; 514} 515 516static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) 517{ 518 read_lock(&snd_pcm_link_rwlock); 519 spin_lock(&substream->self_group.lock); 520} 521 522static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) 523{ 524 spin_unlock(&substream->self_group.lock); 525 read_unlock(&snd_pcm_link_rwlock); 526} 527 528static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) 529{ 530 read_lock_irq(&snd_pcm_link_rwlock); 531 spin_lock(&substream->self_group.lock); 532} 533 534static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) 535{ 536 spin_unlock(&substream->self_group.lock); 537 read_unlock_irq(&snd_pcm_link_rwlock); 538} 539 540#define snd_pcm_stream_lock_irqsave(substream, flags) \ 541do { \ 542 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ 543 spin_lock(&substream->self_group.lock); \ 544} while (0) 545 546#define snd_pcm_stream_unlock_irqrestore(substream, flags) \ 547do { \ 548 spin_unlock(&substream->self_group.lock); \ 549 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ 550} while (0) 551 552#define snd_pcm_group_for_each_entry(s, substream) \ 553 list_for_each_entry(s, &substream->group->substreams, link_list) 554 555static inline int snd_pcm_running(struct snd_pcm_substream *substream) 556{ 557 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || 558 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && 559 substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); 560} 561 562static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) 563{ 564 return size * 8 / runtime->sample_bits; 565} 566 567static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) 568{ 569 return size * 8 / runtime->frame_bits; 570} 571 572static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) 573{ 574 return size * runtime->sample_bits / 8; 575} 576 577static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) 578{ 579 return size * runtime->frame_bits / 8; 580} 581 582static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) 583{ 584 return bytes % runtime->byte_align == 0; 585} 586 587static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) 588{ 589 struct snd_pcm_runtime *runtime = substream->runtime; 590 return frames_to_bytes(runtime, runtime->buffer_size); 591} 592 593static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) 594{ 595 struct snd_pcm_runtime *runtime = substream->runtime; 596 return frames_to_bytes(runtime, runtime->period_size); 597} 598 599/* 600 * result is: 0 ... (boundary - 1) 601 */ 602static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) 603{ 604 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; 605 if (avail < 0) 606 avail += runtime->boundary; 607 else if ((snd_pcm_uframes_t) avail >= runtime->boundary) 608 avail -= runtime->boundary; 609 return avail; 610} 611 612/* 613 * result is: 0 ... (boundary - 1) 614 */ 615static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) 616{ 617 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; 618 if (avail < 0) 619 avail += runtime->boundary; 620 return avail; 621} 622 623static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) 624{ 625 return runtime->buffer_size - snd_pcm_playback_avail(runtime); 626} 627 628static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) 629{ 630 return runtime->buffer_size - snd_pcm_capture_avail(runtime); 631} 632 633/** 634 * snd_pcm_playback_ready - check whether the playback buffer is available 635 * @substream: the pcm substream instance 636 * 637 * Checks whether enough free space is available on the playback buffer. 638 * 639 * Returns non-zero if available, or zero if not. 640 */ 641static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) 642{ 643 struct snd_pcm_runtime *runtime = substream->runtime; 644 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; 645} 646 647/** 648 * snd_pcm_capture_ready - check whether the capture buffer is available 649 * @substream: the pcm substream instance 650 * 651 * Checks whether enough capture data is available on the capture buffer. 652 * 653 * Returns non-zero if available, or zero if not. 654 */ 655static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) 656{ 657 struct snd_pcm_runtime *runtime = substream->runtime; 658 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; 659} 660 661/** 662 * snd_pcm_playback_data - check whether any data exists on the playback buffer 663 * @substream: the pcm substream instance 664 * 665 * Checks whether any data exists on the playback buffer. If stop_threshold 666 * is bigger or equal to boundary, then this function returns always non-zero. 667 * 668 * Returns non-zero if exists, or zero if not. 669 */ 670static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) 671{ 672 struct snd_pcm_runtime *runtime = substream->runtime; 673 674 if (runtime->stop_threshold >= runtime->boundary) 675 return 1; 676 return snd_pcm_playback_avail(runtime) < runtime->buffer_size; 677} 678 679/** 680 * snd_pcm_playback_empty - check whether the playback buffer is empty 681 * @substream: the pcm substream instance 682 * 683 * Checks whether the playback buffer is empty. 684 * 685 * Returns non-zero if empty, or zero if not. 686 */ 687static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) 688{ 689 struct snd_pcm_runtime *runtime = substream->runtime; 690 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; 691} 692 693/** 694 * snd_pcm_capture_empty - check whether the capture buffer is empty 695 * @substream: the pcm substream instance 696 * 697 * Checks whether the capture buffer is empty. 698 * 699 * Returns non-zero if empty, or zero if not. 700 */ 701static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) 702{ 703 struct snd_pcm_runtime *runtime = substream->runtime; 704 return snd_pcm_capture_avail(runtime) == 0; 705} 706 707static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, 708 struct snd_pcm_substream *master) 709{ 710 substream->runtime->trigger_master = master; 711} 712 713static inline int hw_is_mask(int var) 714{ 715 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && 716 var <= SNDRV_PCM_HW_PARAM_LAST_MASK; 717} 718 719static inline int hw_is_interval(int var) 720{ 721 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && 722 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; 723} 724 725static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, 726 snd_pcm_hw_param_t var) 727{ 728 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 729} 730 731static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, 732 snd_pcm_hw_param_t var) 733{ 734 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 735} 736 737static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, 738 snd_pcm_hw_param_t var) 739{ 740 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 741} 742 743static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, 744 snd_pcm_hw_param_t var) 745{ 746 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 747} 748 749#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) 750#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) 751#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) 752#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min 753#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min 754#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min 755#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) 756#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min 757#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min 758#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min 759 760 761int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); 762void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 763void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 764void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, 765 unsigned int k, struct snd_interval *c); 766void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, 767 const struct snd_interval *b, struct snd_interval *c); 768int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); 769int snd_interval_ratnum(struct snd_interval *i, 770 unsigned int rats_count, struct snd_ratnum *rats, 771 unsigned int *nump, unsigned int *denp); 772 773void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); 774void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); 775int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 776 777int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 778 779int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); 780int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); 781 782int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 783 u_int32_t mask); 784int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 785 u_int64_t mask); 786int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 787 unsigned int min, unsigned int max); 788int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); 789int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 790 unsigned int cond, 791 snd_pcm_hw_param_t var, 792 struct snd_pcm_hw_constraint_list *l); 793int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 794 unsigned int cond, 795 snd_pcm_hw_param_t var, 796 struct snd_pcm_hw_constraint_ratnums *r); 797int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, 798 unsigned int cond, 799 snd_pcm_hw_param_t var, 800 struct snd_pcm_hw_constraint_ratdens *r); 801int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, 802 unsigned int cond, 803 unsigned int width, 804 unsigned int msbits); 805int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, 806 unsigned int cond, 807 snd_pcm_hw_param_t var, 808 unsigned long step); 809int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, 810 unsigned int cond, 811 snd_pcm_hw_param_t var); 812int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, 813 unsigned int cond, 814 int var, 815 snd_pcm_hw_rule_func_t func, void *private, 816 int dep, ...); 817 818int snd_pcm_format_signed(snd_pcm_format_t format); 819int snd_pcm_format_unsigned(snd_pcm_format_t format); 820int snd_pcm_format_linear(snd_pcm_format_t format); 821int snd_pcm_format_little_endian(snd_pcm_format_t format); 822int snd_pcm_format_big_endian(snd_pcm_format_t format); 823#ifdef SNDRV_LITTLE_ENDIAN 824#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) 825#else 826#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) 827#endif 828int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ 829int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ 830ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); 831const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); 832int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); 833snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); 834 835void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); 836void snd_pcm_set_sync(struct snd_pcm_substream *substream); 837int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); 838int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, 839 unsigned int cmd, void *arg); 840int snd_pcm_update_state(struct snd_pcm_substream *substream, 841 struct snd_pcm_runtime *runtime); 842int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); 843int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); 844int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); 845int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); 846int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); 847void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); 848void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); 849snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, 850 const void __user *buf, 851 snd_pcm_uframes_t frames); 852snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, 853 void __user *buf, snd_pcm_uframes_t frames); 854snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, 855 void __user **bufs, snd_pcm_uframes_t frames); 856snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, 857 void __user **bufs, snd_pcm_uframes_t frames); 858 859extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; 860 861int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); 862unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); 863 864static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, 865 struct snd_dma_buffer *bufp) 866{ 867 struct snd_pcm_runtime *runtime = substream->runtime; 868 if (bufp) { 869 runtime->dma_buffer_p = bufp; 870 runtime->dma_area = bufp->area; 871 runtime->dma_addr = bufp->addr; 872 runtime->dma_bytes = bufp->bytes; 873 } else { 874 runtime->dma_buffer_p = NULL; 875 runtime->dma_area = NULL; 876 runtime->dma_addr = 0; 877 runtime->dma_bytes = 0; 878 } 879} 880 881/* 882 * Timer interface 883 */ 884 885void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); 886void snd_pcm_timer_init(struct snd_pcm_substream *substream); 887void snd_pcm_timer_done(struct snd_pcm_substream *substream); 888 889static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, 890 struct timespec *tv) 891{ 892 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 893 do_posix_clock_monotonic_gettime(tv); 894 else 895 getnstimeofday(tv); 896} 897 898/* 899 * Memory 900 */ 901 902int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); 903int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); 904int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, 905 int type, struct device *data, 906 size_t size, size_t max); 907int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, 908 int type, void *data, 909 size_t size, size_t max); 910int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); 911int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); 912 913int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, 914 size_t size, gfp_t gfp_flags); 915int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); 916struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, 917 unsigned long offset); 918#define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \ 919 _snd_pcm_lib_alloc_vmalloc_buffer \ 920 (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO) 921#define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \ 922 _snd_pcm_lib_alloc_vmalloc_buffer \ 923 (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO) 924 925#ifdef CONFIG_SND_DMA_SGBUF 926/* 927 * SG-buffer handling 928 */ 929#define snd_pcm_substream_sgbuf(substream) \ 930 ((substream)->runtime->dma_buffer_p->private_data) 931 932static inline dma_addr_t 933snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 934{ 935 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); 936 return snd_sgbuf_get_addr(sg, ofs); 937} 938 939static inline void * 940snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) 941{ 942 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); 943 return snd_sgbuf_get_ptr(sg, ofs); 944} 945 946struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, 947 unsigned long offset); 948unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, 949 unsigned int ofs, unsigned int size); 950 951#else /* !SND_DMA_SGBUF */ 952/* 953 * fake using a continuous buffer 954 */ 955static inline dma_addr_t 956snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 957{ 958 return substream->runtime->dma_addr + ofs; 959} 960 961static inline void * 962snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) 963{ 964 return substream->runtime->dma_area + ofs; 965} 966 967#define snd_pcm_sgbuf_ops_page NULL 968 969#define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size) 970 971#endif /* SND_DMA_SGBUF */ 972 973/* handle mmap counter - PCM mmap callback should handle this counter properly */ 974static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) 975{ 976 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 977 atomic_inc(&substream->mmap_count); 978} 979 980static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) 981{ 982 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 983 atomic_dec(&substream->mmap_count); 984} 985 986/* mmap for io-memory area */ 987#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 988#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP 989int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); 990#else 991#define SNDRV_PCM_INFO_MMAP_IOMEM 0 992#define snd_pcm_lib_mmap_iomem NULL 993#endif 994 995int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, 996 struct vm_area_struct *area); 997#define snd_pcm_lib_mmap_vmalloc snd_pcm_lib_mmap_noncached 998 999static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) 1000{ 1001 *max = dma < 4 ? 64 * 1024 : 128 * 1024; 1002} 1003 1004/* 1005 * Misc 1006 */ 1007 1008#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ 1009 (IEC958_AES1_CON_ORIGINAL<<8)|\ 1010 (IEC958_AES1_CON_PCM_CODER<<8)|\ 1011 (IEC958_AES3_CON_FS_48000<<24)) 1012 1013#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) 1014 1015const char *snd_pcm_format_name(snd_pcm_format_t format); 1016 1017#endif /* __SOUND_PCM_H */ 1018