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_hwptr_log; 266 267 struct snd_pcm_runtime { 268 /* -- Status -- */ 269 struct snd_pcm_substream *trigger_master; 270 struct timespec trigger_tstamp; /* trigger timestamp */ 271 int overrange; 272 snd_pcm_uframes_t avail_max; 273 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ 274 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ 275 unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ 276 snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ 277 278 /* -- HW params -- */ 279 snd_pcm_access_t access; /* access mode */ 280 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ 281 snd_pcm_subformat_t subformat; /* subformat */ 282 unsigned int rate; /* rate in Hz */ 283 unsigned int channels; /* channels */ 284 snd_pcm_uframes_t period_size; /* period size */ 285 unsigned int periods; /* periods */ 286 snd_pcm_uframes_t buffer_size; /* buffer size */ 287 snd_pcm_uframes_t min_align; /* Min alignment for the format */ 288 size_t byte_align; 289 unsigned int frame_bits; 290 unsigned int sample_bits; 291 unsigned int info; 292 unsigned int rate_num; 293 unsigned int rate_den; 294 295 /* -- SW params -- */ 296 int tstamp_mode; /* mmap timestamp is updated */ 297 unsigned int period_step; 298 snd_pcm_uframes_t start_threshold; 299 snd_pcm_uframes_t stop_threshold; 300 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when 301 noise is nearest than this */ 302 snd_pcm_uframes_t silence_size; /* Silence filling size */ 303 snd_pcm_uframes_t boundary; /* pointers wrap point */ 304 305 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ 306 snd_pcm_uframes_t silence_filled; /* size filled with silence */ 307 308 union snd_pcm_sync_id sync; /* hardware synchronization ID */ 309 310 /* -- mmap -- */ 311 struct snd_pcm_mmap_status *status; 312 struct snd_pcm_mmap_control *control; 313 314 /* -- locking / scheduling -- */ 315 unsigned int twake: 1; /* do transfer (!poll) wakeup */ 316 wait_queue_head_t sleep; /* poll sleep */ 317 wait_queue_head_t tsleep; /* transfer sleep */ 318 struct fasync_struct *fasync; 319 320 /* -- private section -- */ 321 void *private_data; 322 void (*private_free)(struct snd_pcm_runtime *runtime); 323 324 /* -- hardware description -- */ 325 struct snd_pcm_hardware hw; 326 struct snd_pcm_hw_constraints hw_constraints; 327 328 /* -- interrupt callbacks -- */ 329 void (*transfer_ack_begin)(struct snd_pcm_substream *substream); 330 void (*transfer_ack_end)(struct snd_pcm_substream *substream); 331 332 /* -- timer -- */ 333 unsigned int timer_resolution; /* timer resolution */ 334 int tstamp_type; /* timestamp type */ 335 336 /* -- DMA -- */ 337 unsigned char *dma_area; /* DMA area */ 338 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ 339 size_t dma_bytes; /* size of DMA area */ 340 341 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ 342 343 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 344 /* -- OSS things -- */ 345 struct snd_pcm_oss_runtime oss; 346 #endif 347 348 #ifdef CONFIG_SND_PCM_XRUN_DEBUG 349 struct snd_pcm_hwptr_log *hwptr_log; 350 #endif 351 }; 352 353 struct snd_pcm_group { /* keep linked substreams */ 354 spinlock_t lock; 355 struct list_head substreams; 356 int count; 357 }; 358 359 struct pid; 360 361 struct snd_pcm_substream { 362 struct snd_pcm *pcm; 363 struct snd_pcm_str *pstr; 364 void *private_data; /* copied from pcm->private_data */ 365 int number; 366 char name[32]; /* substream name */ 367 int stream; /* stream (direction) */ 368 char latency_id[20]; /* latency identifier */ 369 size_t buffer_bytes_max; /* limit ring buffer size */ 370 struct snd_dma_buffer dma_buffer; 371 unsigned int dma_buf_id; 372 size_t dma_max; 373 /* -- hardware operations -- */ 374 struct snd_pcm_ops *ops; 375 /* -- runtime information -- */ 376 struct snd_pcm_runtime *runtime; 377 /* -- timer section -- */ 378 struct snd_timer *timer; /* timer */ 379 unsigned timer_running: 1; /* time is running */ 380 /* -- next substream -- */ 381 struct snd_pcm_substream *next; 382 /* -- linked substreams -- */ 383 struct list_head link_list; /* linked list member */ 384 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ 385 struct snd_pcm_group *group; /* pointer to current group */ 386 /* -- assigned files -- */ 387 void *file; 388 int ref_count; 389 atomic_t mmap_count; 390 unsigned int f_flags; 391 void (*pcm_release)(struct snd_pcm_substream *); 392 struct pid *pid; 393 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 394 /* -- OSS things -- */ 395 struct snd_pcm_oss_substream oss; 396 #endif 397 #ifdef CONFIG_SND_VERBOSE_PROCFS 398 struct snd_info_entry *proc_root; 399 struct snd_info_entry *proc_info_entry; 400 struct snd_info_entry *proc_hw_params_entry; 401 struct snd_info_entry *proc_sw_params_entry; 402 struct snd_info_entry *proc_status_entry; 403 struct snd_info_entry *proc_prealloc_entry; 404 struct snd_info_entry *proc_prealloc_max_entry; 405 #endif 406 /* misc flags */ 407 unsigned int hw_opened: 1; 408 }; 409 410 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) 411 412 413 struct snd_pcm_str { 414 int stream; /* stream (direction) */ 415 struct snd_pcm *pcm; 416 /* -- substreams -- */ 417 unsigned int substream_count; 418 unsigned int substream_opened; 419 struct snd_pcm_substream *substream; 420 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 421 /* -- OSS things -- */ 422 struct snd_pcm_oss_stream oss; 423 #endif 424 #ifdef CONFIG_SND_VERBOSE_PROCFS 425 struct snd_info_entry *proc_root; 426 struct snd_info_entry *proc_info_entry; 427 #ifdef CONFIG_SND_PCM_XRUN_DEBUG 428 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ 429 struct snd_info_entry *proc_xrun_debug_entry; 430 #endif 431 #endif 432 }; 433 434 struct snd_pcm { 435 struct snd_card *card; 436 struct list_head list; 437 int device; /* device number */ 438 unsigned int info_flags; 439 unsigned short dev_class; 440 unsigned short dev_subclass; 441 char id[64]; 442 char name[80]; 443 struct snd_pcm_str streams[2]; 444 struct mutex open_mutex; 445 wait_queue_head_t open_wait; 446 void *private_data; 447 void (*private_free) (struct snd_pcm *pcm); 448 struct device *dev; /* actual hw device this belongs to */ 449 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 450 struct snd_pcm_oss oss; 451 #endif 452 }; 453 454 struct snd_pcm_notify { 455 int (*n_register) (struct snd_pcm * pcm); 456 int (*n_disconnect) (struct snd_pcm * pcm); 457 int (*n_unregister) (struct snd_pcm * pcm); 458 struct list_head list; 459 }; 460 461 /* 462 * Registering 463 */ 464 465 extern const struct file_operations snd_pcm_f_ops[2]; 466 467 int snd_pcm_new(struct snd_card *card, const char *id, int device, 468 int playback_count, int capture_count, 469 struct snd_pcm **rpcm); 470 int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); 471 472 int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); 473 474 /* 475 * Native I/O 476 */ 477 478 extern rwlock_t snd_pcm_link_rwlock; 479 480 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); 481 int snd_pcm_info_user(struct snd_pcm_substream *substream, 482 struct snd_pcm_info __user *info); 483 int snd_pcm_status(struct snd_pcm_substream *substream, 484 struct snd_pcm_status *status); 485 int snd_pcm_start(struct snd_pcm_substream *substream); 486 int snd_pcm_stop(struct snd_pcm_substream *substream, int status); 487 int snd_pcm_drain_done(struct snd_pcm_substream *substream); 488 #ifdef CONFIG_PM 489 int snd_pcm_suspend(struct snd_pcm_substream *substream); 490 int snd_pcm_suspend_all(struct snd_pcm *pcm); 491 #endif 492 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); 493 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, 494 struct snd_pcm_substream **rsubstream); 495 void snd_pcm_release_substream(struct snd_pcm_substream *substream); 496 int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, 497 struct snd_pcm_substream **rsubstream); 498 void snd_pcm_detach_substream(struct snd_pcm_substream *substream); 499 void snd_pcm_vma_notify_data(void *client, void *data); 500 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); 501 502 /* 503 * PCM library 504 */ 505 506 static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) 507 { 508 return substream->group != &substream->self_group; 509 } 510 511 static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) 512 { 513 read_lock(&snd_pcm_link_rwlock); 514 spin_lock(&substream->self_group.lock); 515 } 516 517 static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) 518 { 519 spin_unlock(&substream->self_group.lock); 520 read_unlock(&snd_pcm_link_rwlock); 521 } 522 523 static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) 524 { 525 read_lock_irq(&snd_pcm_link_rwlock); 526 spin_lock(&substream->self_group.lock); 527 } 528 529 static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) 530 { 531 spin_unlock(&substream->self_group.lock); 532 read_unlock_irq(&snd_pcm_link_rwlock); 533 } 534 535 #define snd_pcm_stream_lock_irqsave(substream, flags) \ 536 do { \ 537 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ 538 spin_lock(&substream->self_group.lock); \ 539 } while (0) 540 541 #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ 542 do { \ 543 spin_unlock(&substream->self_group.lock); \ 544 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ 545 } while (0) 546 547 #define snd_pcm_group_for_each_entry(s, substream) \ 548 list_for_each_entry(s, &substream->group->substreams, link_list) 549 550 static inline int snd_pcm_running(struct snd_pcm_substream *substream) 551 { 552 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || 553 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && 554 substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); 555 } 556 557 static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) 558 { 559 return size * 8 / runtime->sample_bits; 560 } 561 562 static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) 563 { 564 return size * 8 / runtime->frame_bits; 565 } 566 567 static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) 568 { 569 return size * runtime->sample_bits / 8; 570 } 571 572 static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) 573 { 574 return size * runtime->frame_bits / 8; 575 } 576 577 static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) 578 { 579 return bytes % runtime->byte_align == 0; 580 } 581 582 static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) 583 { 584 struct snd_pcm_runtime *runtime = substream->runtime; 585 return frames_to_bytes(runtime, runtime->buffer_size); 586 } 587 588 static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) 589 { 590 struct snd_pcm_runtime *runtime = substream->runtime; 591 return frames_to_bytes(runtime, runtime->period_size); 592 } 593 594 /* 595 * result is: 0 ... (boundary - 1) 596 */ 597 static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) 598 { 599 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; 600 if (avail < 0) 601 avail += runtime->boundary; 602 else if ((snd_pcm_uframes_t) avail >= runtime->boundary) 603 avail -= runtime->boundary; 604 return avail; 605 } 606 607 /* 608 * result is: 0 ... (boundary - 1) 609 */ 610 static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) 611 { 612 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; 613 if (avail < 0) 614 avail += runtime->boundary; 615 return avail; 616 } 617 618 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) 619 { 620 return runtime->buffer_size - snd_pcm_playback_avail(runtime); 621 } 622 623 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) 624 { 625 return runtime->buffer_size - snd_pcm_capture_avail(runtime); 626 } 627 628 /** 629 * snd_pcm_playback_ready - check whether the playback buffer is available 630 * @substream: the pcm substream instance 631 * 632 * Checks whether enough free space is available on the playback buffer. 633 * 634 * Returns non-zero if available, or zero if not. 635 */ 636 static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) 637 { 638 struct snd_pcm_runtime *runtime = substream->runtime; 639 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; 640 } 641 642 /** 643 * snd_pcm_capture_ready - check whether the capture buffer is available 644 * @substream: the pcm substream instance 645 * 646 * Checks whether enough capture data is available on the capture buffer. 647 * 648 * Returns non-zero if available, or zero if not. 649 */ 650 static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) 651 { 652 struct snd_pcm_runtime *runtime = substream->runtime; 653 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; 654 } 655 656 /** 657 * snd_pcm_playback_data - check whether any data exists on the playback buffer 658 * @substream: the pcm substream instance 659 * 660 * Checks whether any data exists on the playback buffer. If stop_threshold 661 * is bigger or equal to boundary, then this function returns always non-zero. 662 * 663 * Returns non-zero if exists, or zero if not. 664 */ 665 static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) 666 { 667 struct snd_pcm_runtime *runtime = substream->runtime; 668 669 if (runtime->stop_threshold >= runtime->boundary) 670 return 1; 671 return snd_pcm_playback_avail(runtime) < runtime->buffer_size; 672 } 673 674 /** 675 * snd_pcm_playback_empty - check whether the playback buffer is empty 676 * @substream: the pcm substream instance 677 * 678 * Checks whether the playback buffer is empty. 679 * 680 * Returns non-zero if empty, or zero if not. 681 */ 682 static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) 683 { 684 struct snd_pcm_runtime *runtime = substream->runtime; 685 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; 686 } 687 688 /** 689 * snd_pcm_capture_empty - check whether the capture buffer is empty 690 * @substream: the pcm substream instance 691 * 692 * Checks whether the capture buffer is empty. 693 * 694 * Returns non-zero if empty, or zero if not. 695 */ 696 static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) 697 { 698 struct snd_pcm_runtime *runtime = substream->runtime; 699 return snd_pcm_capture_avail(runtime) == 0; 700 } 701 702 static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, 703 struct snd_pcm_substream *master) 704 { 705 substream->runtime->trigger_master = master; 706 } 707 708 static inline int hw_is_mask(int var) 709 { 710 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && 711 var <= SNDRV_PCM_HW_PARAM_LAST_MASK; 712 } 713 714 static inline int hw_is_interval(int var) 715 { 716 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && 717 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; 718 } 719 720 static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, 721 snd_pcm_hw_param_t var) 722 { 723 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 724 } 725 726 static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, 727 snd_pcm_hw_param_t var) 728 { 729 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 730 } 731 732 static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, 733 snd_pcm_hw_param_t var) 734 { 735 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 736 } 737 738 static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, 739 snd_pcm_hw_param_t var) 740 { 741 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 742 } 743 744 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) 745 #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) 746 #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) 747 #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min 748 #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min 749 #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min 750 #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) 751 #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min 752 #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min 753 #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min 754 755 756 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); 757 void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 758 void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 759 void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, 760 unsigned int k, struct snd_interval *c); 761 void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, 762 const struct snd_interval *b, struct snd_interval *c); 763 int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); 764 int snd_interval_ratnum(struct snd_interval *i, 765 unsigned int rats_count, struct snd_ratnum *rats, 766 unsigned int *nump, unsigned int *denp); 767 768 void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); 769 void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); 770 int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 771 772 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 773 774 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); 775 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); 776 777 int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 778 u_int32_t mask); 779 int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 780 u_int64_t mask); 781 int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 782 unsigned int min, unsigned int max); 783 int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); 784 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 785 unsigned int cond, 786 snd_pcm_hw_param_t var, 787 struct snd_pcm_hw_constraint_list *l); 788 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 789 unsigned int cond, 790 snd_pcm_hw_param_t var, 791 struct snd_pcm_hw_constraint_ratnums *r); 792 int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, 793 unsigned int cond, 794 snd_pcm_hw_param_t var, 795 struct snd_pcm_hw_constraint_ratdens *r); 796 int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, 797 unsigned int cond, 798 unsigned int width, 799 unsigned int msbits); 800 int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, 801 unsigned int cond, 802 snd_pcm_hw_param_t var, 803 unsigned long step); 804 int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, 805 unsigned int cond, 806 snd_pcm_hw_param_t var); 807 int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, 808 unsigned int cond, 809 int var, 810 snd_pcm_hw_rule_func_t func, void *private, 811 int dep, ...); 812 813 int snd_pcm_format_signed(snd_pcm_format_t format); 814 int snd_pcm_format_unsigned(snd_pcm_format_t format); 815 int snd_pcm_format_linear(snd_pcm_format_t format); 816 int snd_pcm_format_little_endian(snd_pcm_format_t format); 817 int snd_pcm_format_big_endian(snd_pcm_format_t format); 818 #if 0 /* just for DocBook */ 819 /** 820 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian 821 * @format: the format to check 822 * 823 * Returns 1 if the given PCM format is CPU-endian, 0 if 824 * opposite, or a negative error code if endian not specified. 825 */ 826 int snd_pcm_format_cpu_endian(snd_pcm_format_t format); 827 #endif /* DocBook */ 828 #ifdef SNDRV_LITTLE_ENDIAN 829 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) 830 #else 831 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) 832 #endif 833 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ 834 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ 835 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); 836 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); 837 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); 838 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); 839 840 void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); 841 void snd_pcm_set_sync(struct snd_pcm_substream *substream); 842 int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); 843 int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, 844 unsigned int cmd, void *arg); 845 int snd_pcm_update_state(struct snd_pcm_substream *substream, 846 struct snd_pcm_runtime *runtime); 847 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); 848 int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); 849 int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); 850 int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); 851 int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); 852 void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); 853 void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); 854 snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, 855 const void __user *buf, 856 snd_pcm_uframes_t frames); 857 snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, 858 void __user *buf, snd_pcm_uframes_t frames); 859 snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, 860 void __user **bufs, snd_pcm_uframes_t frames); 861 snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, 862 void __user **bufs, snd_pcm_uframes_t frames); 863 864 extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; 865 866 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); 867 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); 868 869 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, 870 struct snd_dma_buffer *bufp) 871 { 872 struct snd_pcm_runtime *runtime = substream->runtime; 873 if (bufp) { 874 runtime->dma_buffer_p = bufp; 875 runtime->dma_area = bufp->area; 876 runtime->dma_addr = bufp->addr; 877 runtime->dma_bytes = bufp->bytes; 878 } else { 879 runtime->dma_buffer_p = NULL; 880 runtime->dma_area = NULL; 881 runtime->dma_addr = 0; 882 runtime->dma_bytes = 0; 883 } 884 } 885 886 /* 887 * Timer interface 888 */ 889 890 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); 891 void snd_pcm_timer_init(struct snd_pcm_substream *substream); 892 void snd_pcm_timer_done(struct snd_pcm_substream *substream); 893 894 static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, 895 struct timespec *tv) 896 { 897 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 898 do_posix_clock_monotonic_gettime(tv); 899 else 900 getnstimeofday(tv); 901 } 902 903 /* 904 * Memory 905 */ 906 907 int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); 908 int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); 909 int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, 910 int type, struct device *data, 911 size_t size, size_t max); 912 int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, 913 int type, void *data, 914 size_t size, size_t max); 915 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); 916 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); 917 918 int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, 919 size_t size, gfp_t gfp_flags); 920 int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); 921 struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, 922 unsigned long offset); 923 #if 0 /* for kernel-doc */ 924 /** 925 * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer 926 * @substream: the substream to allocate the buffer to 927 * @size: the requested buffer size, in bytes 928 * 929 * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is 930 * contiguous in kernel virtual space, but not in physical memory. Use this 931 * if the buffer is accessed by kernel code but not by device DMA. 932 * 933 * Returns 1 if the buffer was changed, 0 if not changed, or a negative error 934 * code. 935 */ 936 static int snd_pcm_lib_alloc_vmalloc_buffer 937 (struct snd_pcm_substream *substream, size_t size); 938 /** 939 * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer 940 * @substream: the substream to allocate the buffer to 941 * @size: the requested buffer size, in bytes 942 * 943 * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses 944 * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. 945 */ 946 static int snd_pcm_lib_alloc_vmalloc_32_buffer 947 (struct snd_pcm_substream *substream, size_t size); 948 #endif 949 #define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \ 950 _snd_pcm_lib_alloc_vmalloc_buffer \ 951 (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO) 952 #define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \ 953 _snd_pcm_lib_alloc_vmalloc_buffer \ 954 (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO) 955 956 #ifdef CONFIG_SND_DMA_SGBUF 957 /* 958 * SG-buffer handling 959 */ 960 #define snd_pcm_substream_sgbuf(substream) \ 961 ((substream)->runtime->dma_buffer_p->private_data) 962 963 static inline dma_addr_t 964 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 965 { 966 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); 967 return snd_sgbuf_get_addr(sg, ofs); 968 } 969 970 static inline void * 971 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) 972 { 973 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); 974 return snd_sgbuf_get_ptr(sg, ofs); 975 } 976 977 struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, 978 unsigned long offset); 979 unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, 980 unsigned int ofs, unsigned int size); 981 982 #else /* !SND_DMA_SGBUF */ 983 /* 984 * fake using a continuous buffer 985 */ 986 static inline dma_addr_t 987 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 988 { 989 return substream->runtime->dma_addr + ofs; 990 } 991 992 static inline void * 993 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) 994 { 995 return substream->runtime->dma_area + ofs; 996 } 997 998 #define snd_pcm_sgbuf_ops_page NULL 999 1000 #define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size) 1001 1002 #endif /* SND_DMA_SGBUF */ 1003 1004 /* handle mmap counter - PCM mmap callback should handle this counter properly */ 1005 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) 1006 { 1007 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 1008 atomic_inc(&substream->mmap_count); 1009 } 1010 1011 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) 1012 { 1013 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 1014 atomic_dec(&substream->mmap_count); 1015 } 1016 1017 /* mmap for io-memory area */ 1018 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 1019 #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP 1020 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); 1021 #else 1022 #define SNDRV_PCM_INFO_MMAP_IOMEM 0 1023 #define snd_pcm_lib_mmap_iomem NULL 1024 #endif 1025 1026 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, 1027 struct vm_area_struct *area); 1028 #define snd_pcm_lib_mmap_vmalloc snd_pcm_lib_mmap_noncached 1029 1030 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) 1031 { 1032 *max = dma < 4 ? 64 * 1024 : 128 * 1024; 1033 } 1034 1035 /* 1036 * Misc 1037 */ 1038 1039 #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ 1040 (IEC958_AES1_CON_ORIGINAL<<8)|\ 1041 (IEC958_AES1_CON_PCM_CODER<<8)|\ 1042 (IEC958_AES3_CON_FS_48000<<24)) 1043 1044 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) 1045 1046 const char *snd_pcm_format_name(snd_pcm_format_t format); 1047 1048 #endif /* __SOUND_PCM_H */ 1049