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 snd_pcm_substream { 352 struct snd_pcm *pcm; 353 struct snd_pcm_str *pstr; 354 void *private_data; /* copied from pcm->private_data */ 355 int number; 356 char name[32]; /* substream name */ 357 int stream; /* stream (direction) */ 358 char latency_id[20]; /* latency identifier */ 359 size_t buffer_bytes_max; /* limit ring buffer size */ 360 struct snd_dma_buffer dma_buffer; 361 unsigned int dma_buf_id; 362 size_t dma_max; 363 /* -- hardware operations -- */ 364 struct snd_pcm_ops *ops; 365 /* -- runtime information -- */ 366 struct snd_pcm_runtime *runtime; 367 /* -- timer section -- */ 368 struct snd_timer *timer; /* timer */ 369 unsigned timer_running: 1; /* time is running */ 370 /* -- next substream -- */ 371 struct snd_pcm_substream *next; 372 /* -- linked substreams -- */ 373 struct list_head link_list; /* linked list member */ 374 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ 375 struct snd_pcm_group *group; /* pointer to current group */ 376 /* -- assigned files -- */ 377 void *file; 378 int ref_count; 379 atomic_t mmap_count; 380 unsigned int f_flags; 381 void (*pcm_release)(struct snd_pcm_substream *); 382 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 383 /* -- OSS things -- */ 384 struct snd_pcm_oss_substream oss; 385 #endif 386 #ifdef CONFIG_SND_VERBOSE_PROCFS 387 struct snd_info_entry *proc_root; 388 struct snd_info_entry *proc_info_entry; 389 struct snd_info_entry *proc_hw_params_entry; 390 struct snd_info_entry *proc_sw_params_entry; 391 struct snd_info_entry *proc_status_entry; 392 struct snd_info_entry *proc_prealloc_entry; 393 struct snd_info_entry *proc_prealloc_max_entry; 394 #endif 395 /* misc flags */ 396 unsigned int hw_opened: 1; 397 }; 398 399 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) 400 401 402 struct snd_pcm_str { 403 int stream; /* stream (direction) */ 404 struct snd_pcm *pcm; 405 /* -- substreams -- */ 406 unsigned int substream_count; 407 unsigned int substream_opened; 408 struct snd_pcm_substream *substream; 409 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 410 /* -- OSS things -- */ 411 struct snd_pcm_oss_stream oss; 412 #endif 413 #ifdef CONFIG_SND_VERBOSE_PROCFS 414 struct snd_info_entry *proc_root; 415 struct snd_info_entry *proc_info_entry; 416 #ifdef CONFIG_SND_PCM_XRUN_DEBUG 417 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ 418 struct snd_info_entry *proc_xrun_debug_entry; 419 #endif 420 #endif 421 }; 422 423 struct snd_pcm { 424 struct snd_card *card; 425 struct list_head list; 426 int device; /* device number */ 427 unsigned int info_flags; 428 unsigned short dev_class; 429 unsigned short dev_subclass; 430 char id[64]; 431 char name[80]; 432 struct snd_pcm_str streams[2]; 433 struct mutex open_mutex; 434 wait_queue_head_t open_wait; 435 void *private_data; 436 void (*private_free) (struct snd_pcm *pcm); 437 struct device *dev; /* actual hw device this belongs to */ 438 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 439 struct snd_pcm_oss oss; 440 #endif 441 }; 442 443 struct snd_pcm_notify { 444 int (*n_register) (struct snd_pcm * pcm); 445 int (*n_disconnect) (struct snd_pcm * pcm); 446 int (*n_unregister) (struct snd_pcm * pcm); 447 struct list_head list; 448 }; 449 450 /* 451 * Registering 452 */ 453 454 extern const struct file_operations snd_pcm_f_ops[2]; 455 456 int snd_pcm_new(struct snd_card *card, const char *id, int device, 457 int playback_count, int capture_count, 458 struct snd_pcm **rpcm); 459 int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); 460 461 int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); 462 463 /* 464 * Native I/O 465 */ 466 467 extern rwlock_t snd_pcm_link_rwlock; 468 469 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); 470 int snd_pcm_info_user(struct snd_pcm_substream *substream, 471 struct snd_pcm_info __user *info); 472 int snd_pcm_status(struct snd_pcm_substream *substream, 473 struct snd_pcm_status *status); 474 int snd_pcm_start(struct snd_pcm_substream *substream); 475 int snd_pcm_stop(struct snd_pcm_substream *substream, int status); 476 int snd_pcm_drain_done(struct snd_pcm_substream *substream); 477 #ifdef CONFIG_PM 478 int snd_pcm_suspend(struct snd_pcm_substream *substream); 479 int snd_pcm_suspend_all(struct snd_pcm *pcm); 480 #endif 481 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); 482 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, 483 struct snd_pcm_substream **rsubstream); 484 void snd_pcm_release_substream(struct snd_pcm_substream *substream); 485 int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, 486 struct snd_pcm_substream **rsubstream); 487 void snd_pcm_detach_substream(struct snd_pcm_substream *substream); 488 void snd_pcm_vma_notify_data(void *client, void *data); 489 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); 490 491 /* 492 * PCM library 493 */ 494 495 static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) 496 { 497 return substream->group != &substream->self_group; 498 } 499 500 static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) 501 { 502 read_lock(&snd_pcm_link_rwlock); 503 spin_lock(&substream->self_group.lock); 504 } 505 506 static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) 507 { 508 spin_unlock(&substream->self_group.lock); 509 read_unlock(&snd_pcm_link_rwlock); 510 } 511 512 static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) 513 { 514 read_lock_irq(&snd_pcm_link_rwlock); 515 spin_lock(&substream->self_group.lock); 516 } 517 518 static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) 519 { 520 spin_unlock(&substream->self_group.lock); 521 read_unlock_irq(&snd_pcm_link_rwlock); 522 } 523 524 #define snd_pcm_stream_lock_irqsave(substream, flags) \ 525 do { \ 526 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ 527 spin_lock(&substream->self_group.lock); \ 528 } while (0) 529 530 #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ 531 do { \ 532 spin_unlock(&substream->self_group.lock); \ 533 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ 534 } while (0) 535 536 #define snd_pcm_group_for_each_entry(s, substream) \ 537 list_for_each_entry(s, &substream->group->substreams, link_list) 538 539 static inline int snd_pcm_running(struct snd_pcm_substream *substream) 540 { 541 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || 542 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && 543 substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); 544 } 545 546 static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) 547 { 548 return size * 8 / runtime->sample_bits; 549 } 550 551 static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) 552 { 553 return size * 8 / runtime->frame_bits; 554 } 555 556 static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) 557 { 558 return size * runtime->sample_bits / 8; 559 } 560 561 static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) 562 { 563 return size * runtime->frame_bits / 8; 564 } 565 566 static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) 567 { 568 return bytes % runtime->byte_align == 0; 569 } 570 571 static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) 572 { 573 struct snd_pcm_runtime *runtime = substream->runtime; 574 return frames_to_bytes(runtime, runtime->buffer_size); 575 } 576 577 static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) 578 { 579 struct snd_pcm_runtime *runtime = substream->runtime; 580 return frames_to_bytes(runtime, runtime->period_size); 581 } 582 583 /* 584 * result is: 0 ... (boundary - 1) 585 */ 586 static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) 587 { 588 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; 589 if (avail < 0) 590 avail += runtime->boundary; 591 else if ((snd_pcm_uframes_t) avail >= runtime->boundary) 592 avail -= runtime->boundary; 593 return avail; 594 } 595 596 /* 597 * result is: 0 ... (boundary - 1) 598 */ 599 static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) 600 { 601 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; 602 if (avail < 0) 603 avail += runtime->boundary; 604 return avail; 605 } 606 607 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) 608 { 609 return runtime->buffer_size - snd_pcm_playback_avail(runtime); 610 } 611 612 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) 613 { 614 return runtime->buffer_size - snd_pcm_capture_avail(runtime); 615 } 616 617 /** 618 * snd_pcm_playback_ready - check whether the playback buffer is available 619 * @substream: the pcm substream instance 620 * 621 * Checks whether enough free space is available on the playback buffer. 622 * 623 * Returns non-zero if available, or zero if not. 624 */ 625 static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) 626 { 627 struct snd_pcm_runtime *runtime = substream->runtime; 628 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; 629 } 630 631 /** 632 * snd_pcm_capture_ready - check whether the capture buffer is available 633 * @substream: the pcm substream instance 634 * 635 * Checks whether enough capture data is available on the capture buffer. 636 * 637 * Returns non-zero if available, or zero if not. 638 */ 639 static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) 640 { 641 struct snd_pcm_runtime *runtime = substream->runtime; 642 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; 643 } 644 645 /** 646 * snd_pcm_playback_data - check whether any data exists on the playback buffer 647 * @substream: the pcm substream instance 648 * 649 * Checks whether any data exists on the playback buffer. If stop_threshold 650 * is bigger or equal to boundary, then this function returns always non-zero. 651 * 652 * Returns non-zero if exists, or zero if not. 653 */ 654 static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) 655 { 656 struct snd_pcm_runtime *runtime = substream->runtime; 657 658 if (runtime->stop_threshold >= runtime->boundary) 659 return 1; 660 return snd_pcm_playback_avail(runtime) < runtime->buffer_size; 661 } 662 663 /** 664 * snd_pcm_playback_empty - check whether the playback buffer is empty 665 * @substream: the pcm substream instance 666 * 667 * Checks whether the playback buffer is empty. 668 * 669 * Returns non-zero if empty, or zero if not. 670 */ 671 static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) 672 { 673 struct snd_pcm_runtime *runtime = substream->runtime; 674 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; 675 } 676 677 /** 678 * snd_pcm_capture_empty - check whether the capture buffer is empty 679 * @substream: the pcm substream instance 680 * 681 * Checks whether the capture buffer is empty. 682 * 683 * Returns non-zero if empty, or zero if not. 684 */ 685 static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) 686 { 687 struct snd_pcm_runtime *runtime = substream->runtime; 688 return snd_pcm_capture_avail(runtime) == 0; 689 } 690 691 static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, 692 struct snd_pcm_substream *master) 693 { 694 substream->runtime->trigger_master = master; 695 } 696 697 static inline int hw_is_mask(int var) 698 { 699 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && 700 var <= SNDRV_PCM_HW_PARAM_LAST_MASK; 701 } 702 703 static inline int hw_is_interval(int var) 704 { 705 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && 706 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; 707 } 708 709 static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, 710 snd_pcm_hw_param_t var) 711 { 712 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 713 } 714 715 static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, 716 snd_pcm_hw_param_t var) 717 { 718 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 719 } 720 721 static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, 722 snd_pcm_hw_param_t var) 723 { 724 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 725 } 726 727 static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, 728 snd_pcm_hw_param_t var) 729 { 730 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 731 } 732 733 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) 734 #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) 735 #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) 736 #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min 737 #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min 738 #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min 739 #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) 740 #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min 741 #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min 742 #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min 743 744 745 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); 746 void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 747 void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 748 void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, 749 unsigned int k, struct snd_interval *c); 750 void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, 751 const struct snd_interval *b, struct snd_interval *c); 752 int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); 753 int snd_interval_ratnum(struct snd_interval *i, 754 unsigned int rats_count, struct snd_ratnum *rats, 755 unsigned int *nump, unsigned int *denp); 756 757 void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); 758 void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); 759 int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 760 761 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 762 763 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); 764 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); 765 766 int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 767 u_int32_t mask); 768 int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 769 u_int64_t mask); 770 int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 771 unsigned int min, unsigned int max); 772 int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); 773 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 774 unsigned int cond, 775 snd_pcm_hw_param_t var, 776 struct snd_pcm_hw_constraint_list *l); 777 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 778 unsigned int cond, 779 snd_pcm_hw_param_t var, 780 struct snd_pcm_hw_constraint_ratnums *r); 781 int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, 782 unsigned int cond, 783 snd_pcm_hw_param_t var, 784 struct snd_pcm_hw_constraint_ratdens *r); 785 int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, 786 unsigned int cond, 787 unsigned int width, 788 unsigned int msbits); 789 int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, 790 unsigned int cond, 791 snd_pcm_hw_param_t var, 792 unsigned long step); 793 int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, 794 unsigned int cond, 795 snd_pcm_hw_param_t var); 796 int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, 797 unsigned int cond, 798 int var, 799 snd_pcm_hw_rule_func_t func, void *private, 800 int dep, ...); 801 802 int snd_pcm_format_signed(snd_pcm_format_t format); 803 int snd_pcm_format_unsigned(snd_pcm_format_t format); 804 int snd_pcm_format_linear(snd_pcm_format_t format); 805 int snd_pcm_format_little_endian(snd_pcm_format_t format); 806 int snd_pcm_format_big_endian(snd_pcm_format_t format); 807 #if 0 /* just for DocBook */ 808 /** 809 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian 810 * @format: the format to check 811 * 812 * Returns 1 if the given PCM format is CPU-endian, 0 if 813 * opposite, or a negative error code if endian not specified. 814 */ 815 int snd_pcm_format_cpu_endian(snd_pcm_format_t format); 816 #endif /* DocBook */ 817 #ifdef SNDRV_LITTLE_ENDIAN 818 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) 819 #else 820 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) 821 #endif 822 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ 823 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ 824 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); 825 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); 826 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); 827 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); 828 829 void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); 830 void snd_pcm_set_sync(struct snd_pcm_substream *substream); 831 int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); 832 int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, 833 unsigned int cmd, void *arg); 834 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); 835 int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); 836 int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); 837 int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); 838 int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); 839 void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); 840 void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); 841 snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, 842 const void __user *buf, 843 snd_pcm_uframes_t frames); 844 snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, 845 void __user *buf, snd_pcm_uframes_t frames); 846 snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, 847 void __user **bufs, snd_pcm_uframes_t frames); 848 snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, 849 void __user **bufs, snd_pcm_uframes_t frames); 850 851 extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; 852 853 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); 854 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); 855 856 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, 857 struct snd_dma_buffer *bufp) 858 { 859 struct snd_pcm_runtime *runtime = substream->runtime; 860 if (bufp) { 861 runtime->dma_buffer_p = bufp; 862 runtime->dma_area = bufp->area; 863 runtime->dma_addr = bufp->addr; 864 runtime->dma_bytes = bufp->bytes; 865 } else { 866 runtime->dma_buffer_p = NULL; 867 runtime->dma_area = NULL; 868 runtime->dma_addr = 0; 869 runtime->dma_bytes = 0; 870 } 871 } 872 873 /* 874 * Timer interface 875 */ 876 877 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); 878 void snd_pcm_timer_init(struct snd_pcm_substream *substream); 879 void snd_pcm_timer_done(struct snd_pcm_substream *substream); 880 881 static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, 882 struct timespec *tv) 883 { 884 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 885 do_posix_clock_monotonic_gettime(tv); 886 else 887 getnstimeofday(tv); 888 } 889 890 /* 891 * Memory 892 */ 893 894 int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); 895 int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); 896 int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, 897 int type, struct device *data, 898 size_t size, size_t max); 899 int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, 900 int type, void *data, 901 size_t size, size_t max); 902 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); 903 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); 904 905 #ifdef CONFIG_SND_DMA_SGBUF 906 /* 907 * SG-buffer handling 908 */ 909 #define snd_pcm_substream_sgbuf(substream) \ 910 ((substream)->runtime->dma_buffer_p->private_data) 911 912 static inline dma_addr_t 913 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 914 { 915 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); 916 return snd_sgbuf_get_addr(sg, ofs); 917 } 918 919 static inline void * 920 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) 921 { 922 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); 923 return snd_sgbuf_get_ptr(sg, ofs); 924 } 925 926 struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, 927 unsigned long offset); 928 unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, 929 unsigned int ofs, unsigned int size); 930 931 #else /* !SND_DMA_SGBUF */ 932 /* 933 * fake using a continuous buffer 934 */ 935 static inline dma_addr_t 936 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 937 { 938 return substream->runtime->dma_addr + ofs; 939 } 940 941 static inline void * 942 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) 943 { 944 return substream->runtime->dma_area + ofs; 945 } 946 947 #define snd_pcm_sgbuf_ops_page NULL 948 949 #define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size) 950 951 #endif /* SND_DMA_SGBUF */ 952 953 /* handle mmap counter - PCM mmap callback should handle this counter properly */ 954 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) 955 { 956 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 957 atomic_inc(&substream->mmap_count); 958 } 959 960 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) 961 { 962 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 963 atomic_dec(&substream->mmap_count); 964 } 965 966 /* mmap for io-memory area */ 967 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 968 #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP 969 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); 970 #else 971 #define SNDRV_PCM_INFO_MMAP_IOMEM 0 972 #define snd_pcm_lib_mmap_iomem NULL 973 #endif 974 975 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) 976 { 977 *max = dma < 4 ? 64 * 1024 : 128 * 1024; 978 } 979 980 /* 981 * Misc 982 */ 983 984 #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ 985 (IEC958_AES1_CON_ORIGINAL<<8)|\ 986 (IEC958_AES1_CON_PCM_CODER<<8)|\ 987 (IEC958_AES3_CON_FS_48000<<24)) 988 989 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) 990 991 const char *snd_pcm_format_name(snd_pcm_format_t format); 992 993 #endif /* __SOUND_PCM_H */ 994