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