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@suse.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 <linux/poll.h> 29 #include <linux/bitops.h> 30 31 typedef sndrv_pcm_uframes_t snd_pcm_uframes_t; 32 typedef sndrv_pcm_sframes_t snd_pcm_sframes_t; 33 typedef enum sndrv_pcm_class snd_pcm_class_t; 34 typedef enum sndrv_pcm_subclass snd_pcm_subclass_t; 35 typedef enum sndrv_pcm_stream snd_pcm_stream_t; 36 typedef enum sndrv_pcm_access snd_pcm_access_t; 37 typedef enum sndrv_pcm_format snd_pcm_format_t; 38 typedef enum sndrv_pcm_subformat snd_pcm_subformat_t; 39 typedef enum sndrv_pcm_state snd_pcm_state_t; 40 typedef union sndrv_pcm_sync_id snd_pcm_sync_id_t; 41 typedef struct sndrv_pcm_info snd_pcm_info_t; 42 typedef enum sndrv_pcm_hw_param snd_pcm_hw_param_t; 43 typedef struct sndrv_pcm_hw_params snd_pcm_hw_params_t; 44 typedef enum sndrv_pcm_start snd_pcm_start_t; 45 typedef enum sndrv_pcm_xrun snd_pcm_xrun_t; 46 typedef enum sndrv_pcm_tstamp snd_pcm_tstamp_t; 47 typedef struct sndrv_pcm_sw_params snd_pcm_sw_params_t; 48 typedef struct sndrv_pcm_channel_info snd_pcm_channel_info_t; 49 typedef struct sndrv_pcm_status snd_pcm_status_t; 50 typedef struct sndrv_pcm_mmap_status snd_pcm_mmap_status_t; 51 typedef struct sndrv_pcm_mmap_control snd_pcm_mmap_control_t; 52 typedef struct sndrv_mask snd_mask_t; 53 typedef struct snd_sg_buf snd_pcm_sgbuf_t; 54 55 #define snd_pcm_substream_chip(substream) ((substream)->private_data) 56 #define snd_pcm_chip(pcm) ((pcm)->private_data) 57 58 typedef struct _snd_pcm_file snd_pcm_file_t; 59 typedef struct _snd_pcm_runtime snd_pcm_runtime_t; 60 61 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 62 #include "pcm_oss.h" 63 #endif 64 65 /* 66 * Hardware (lowlevel) section 67 */ 68 69 typedef struct _snd_pcm_hardware { 70 unsigned int info; /* SNDRV_PCM_INFO_* */ 71 u64 formats; /* SNDRV_PCM_FMTBIT_* */ 72 unsigned int rates; /* SNDRV_PCM_RATE_* */ 73 unsigned int rate_min; /* min rate */ 74 unsigned int rate_max; /* max rate */ 75 unsigned int channels_min; /* min channels */ 76 unsigned int channels_max; /* max channels */ 77 size_t buffer_bytes_max; /* max buffer size */ 78 size_t period_bytes_min; /* min period size */ 79 size_t period_bytes_max; /* max period size */ 80 unsigned int periods_min; /* min # of periods */ 81 unsigned int periods_max; /* max # of periods */ 82 size_t fifo_size; /* fifo size in bytes */ 83 } snd_pcm_hardware_t; 84 85 typedef struct _snd_pcm_ops { 86 int (*open)(snd_pcm_substream_t *substream); 87 int (*close)(snd_pcm_substream_t *substream); 88 int (*ioctl)(snd_pcm_substream_t * substream, 89 unsigned int cmd, void *arg); 90 int (*hw_params)(snd_pcm_substream_t * substream, snd_pcm_hw_params_t * params); 91 int (*hw_free)(snd_pcm_substream_t *substream); 92 int (*prepare)(snd_pcm_substream_t * substream); 93 int (*trigger)(snd_pcm_substream_t * substream, int cmd); 94 snd_pcm_uframes_t (*pointer)(snd_pcm_substream_t * substream); 95 int (*copy)(snd_pcm_substream_t *substream, int channel, snd_pcm_uframes_t pos, 96 void __user *buf, snd_pcm_uframes_t count); 97 int (*silence)(snd_pcm_substream_t *substream, int channel, 98 snd_pcm_uframes_t pos, snd_pcm_uframes_t count); 99 struct page *(*page)(snd_pcm_substream_t *substream, unsigned long offset); 100 int (*mmap)(snd_pcm_substream_t *substream, struct vm_area_struct *vma); 101 int (*ack)(snd_pcm_substream_t *substream); 102 } snd_pcm_ops_t; 103 104 /* 105 * 106 */ 107 108 #define SNDRV_PCM_DEVICES 8 109 110 #define SNDRV_PCM_IOCTL1_FALSE ((void *)0) 111 #define SNDRV_PCM_IOCTL1_TRUE ((void *)1) 112 113 #define SNDRV_PCM_IOCTL1_RESET 0 114 #define SNDRV_PCM_IOCTL1_INFO 1 115 #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 116 #define SNDRV_PCM_IOCTL1_GSTATE 3 117 118 #define SNDRV_PCM_TRIGGER_STOP 0 119 #define SNDRV_PCM_TRIGGER_START 1 120 #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 121 #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 122 #define SNDRV_PCM_TRIGGER_SUSPEND 5 123 #define SNDRV_PCM_TRIGGER_RESUME 6 124 125 #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) 126 127 /* If you change this don't forget to change rates[] table in pcm_native.c */ 128 #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ 129 #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ 130 #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ 131 #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ 132 #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ 133 #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ 134 #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ 135 #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ 136 #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ 137 #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ 138 #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ 139 #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ 140 #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ 141 142 #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ 143 #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ 144 145 #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ 146 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ 147 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) 148 #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) 149 #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ 150 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) 151 #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ 152 SNDRV_PCM_RATE_192000) 153 #define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8) 154 #define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8) 155 #define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE) 156 #define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE) 157 #define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE) 158 #define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE) 159 #define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE) 160 #define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE) 161 #define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE) 162 #define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE) 163 #define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE) 164 #define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE) 165 #define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE) 166 #define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE) 167 #define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE) 168 #define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE) 169 #define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE) 170 #define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE) 171 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE) 172 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE) 173 #define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW) 174 #define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW) 175 #define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM) 176 #define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG) 177 #define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM) 178 #define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL) 179 #define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE) 180 #define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE) 181 #define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE) 182 #define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE) 183 #define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE) 184 #define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE) 185 #define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE) 186 #define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE) 187 #define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE) 188 #define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE) 189 #define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE) 190 #define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE) 191 192 #ifdef SNDRV_LITTLE_ENDIAN 193 #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE 194 #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE 195 #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE 196 #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE 197 #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE 198 #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE 199 #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE 200 #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE 201 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE 202 #endif 203 #ifdef SNDRV_BIG_ENDIAN 204 #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE 205 #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE 206 #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE 207 #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE 208 #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE 209 #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE 210 #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE 211 #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE 212 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE 213 #endif 214 215 struct _snd_pcm_file { 216 snd_pcm_substream_t * substream; 217 struct _snd_pcm_file * next; 218 }; 219 220 typedef struct _snd_pcm_hw_rule snd_pcm_hw_rule_t; 221 222 typedef int (*snd_pcm_hw_rule_func_t)(snd_pcm_hw_params_t *params, 223 snd_pcm_hw_rule_t *rule); 224 225 struct _snd_pcm_hw_rule { 226 unsigned int cond; 227 snd_pcm_hw_rule_func_t func; 228 int var; 229 int deps[4]; 230 void *private; 231 }; 232 233 typedef struct _snd_pcm_hw_constraints { 234 snd_mask_t masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 235 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; 236 snd_interval_t intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - 237 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; 238 unsigned int rules_num; 239 unsigned int rules_all; 240 snd_pcm_hw_rule_t *rules; 241 } snd_pcm_hw_constraints_t; 242 243 static inline snd_mask_t *constrs_mask(snd_pcm_hw_constraints_t *constrs, 244 snd_pcm_hw_param_t var) 245 { 246 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 247 } 248 249 static inline snd_interval_t *constrs_interval(snd_pcm_hw_constraints_t *constrs, 250 snd_pcm_hw_param_t var) 251 { 252 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 253 } 254 255 typedef struct { 256 unsigned int num; 257 unsigned int den_min, den_max, den_step; 258 } ratnum_t; 259 260 typedef struct { 261 unsigned int num_min, num_max, num_step; 262 unsigned int den; 263 } ratden_t; 264 265 typedef struct { 266 int nrats; 267 ratnum_t *rats; 268 } snd_pcm_hw_constraint_ratnums_t; 269 270 typedef struct { 271 int nrats; 272 ratden_t *rats; 273 } snd_pcm_hw_constraint_ratdens_t; 274 275 typedef struct { 276 unsigned int count; 277 unsigned int *list; 278 unsigned int mask; 279 } snd_pcm_hw_constraint_list_t; 280 281 struct _snd_pcm_runtime { 282 /* -- Status -- */ 283 snd_pcm_substream_t *trigger_master; 284 struct timespec trigger_tstamp; /* trigger timestamp */ 285 int overrange; 286 snd_pcm_uframes_t avail_max; 287 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ 288 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/ 289 290 /* -- HW params -- */ 291 snd_pcm_access_t access; /* access mode */ 292 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ 293 snd_pcm_subformat_t subformat; /* subformat */ 294 unsigned int rate; /* rate in Hz */ 295 unsigned int channels; /* channels */ 296 snd_pcm_uframes_t period_size; /* period size */ 297 unsigned int periods; /* periods */ 298 snd_pcm_uframes_t buffer_size; /* buffer size */ 299 unsigned int tick_time; /* tick time */ 300 snd_pcm_uframes_t min_align; /* Min alignment for the format */ 301 size_t byte_align; 302 unsigned int frame_bits; 303 unsigned int sample_bits; 304 unsigned int info; 305 unsigned int rate_num; 306 unsigned int rate_den; 307 308 /* -- SW params -- */ 309 snd_pcm_tstamp_t tstamp_mode; /* mmap timestamp is updated */ 310 unsigned int period_step; 311 unsigned int sleep_min; /* min ticks to sleep */ 312 snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */ 313 snd_pcm_uframes_t start_threshold; 314 snd_pcm_uframes_t stop_threshold; 315 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when 316 noise is nearest than this */ 317 snd_pcm_uframes_t silence_size; /* Silence filling size */ 318 snd_pcm_uframes_t boundary; /* pointers wrap point */ 319 320 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ 321 snd_pcm_uframes_t silence_filled; /* size filled with silence */ 322 323 snd_pcm_sync_id_t sync; /* hardware synchronization ID */ 324 325 /* -- mmap -- */ 326 volatile snd_pcm_mmap_status_t *status; 327 volatile snd_pcm_mmap_control_t *control; 328 atomic_t mmap_count; 329 330 /* -- locking / scheduling -- */ 331 wait_queue_head_t sleep; 332 struct timer_list tick_timer; 333 struct fasync_struct *fasync; 334 335 /* -- private section -- */ 336 void *private_data; 337 void (*private_free)(snd_pcm_runtime_t *runtime); 338 339 /* -- hardware description -- */ 340 snd_pcm_hardware_t hw; 341 snd_pcm_hw_constraints_t hw_constraints; 342 343 /* -- interrupt callbacks -- */ 344 void (*transfer_ack_begin)(snd_pcm_substream_t *substream); 345 void (*transfer_ack_end)(snd_pcm_substream_t *substream); 346 347 /* -- timer -- */ 348 unsigned int timer_resolution; /* timer resolution */ 349 350 /* -- DMA -- */ 351 unsigned char *dma_area; /* DMA area */ 352 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ 353 size_t dma_bytes; /* size of DMA area */ 354 355 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ 356 357 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 358 /* -- OSS things -- */ 359 snd_pcm_oss_runtime_t oss; 360 #endif 361 }; 362 363 typedef struct _snd_pcm_group { /* keep linked substreams */ 364 spinlock_t lock; 365 struct list_head substreams; 366 int count; 367 } snd_pcm_group_t; 368 369 struct _snd_pcm_substream { 370 snd_pcm_t *pcm; 371 snd_pcm_str_t *pstr; 372 void *private_data; /* copied from pcm->private_data */ 373 int number; 374 char name[32]; /* substream name */ 375 int stream; /* stream (direction) */ 376 size_t buffer_bytes_max; /* limit ring buffer size */ 377 struct snd_dma_buffer dma_buffer; 378 unsigned int dma_buf_id; 379 size_t dma_max; 380 /* -- hardware operations -- */ 381 snd_pcm_ops_t *ops; 382 /* -- runtime information -- */ 383 snd_pcm_runtime_t *runtime; 384 /* -- timer section -- */ 385 snd_timer_t *timer; /* timer */ 386 unsigned timer_running: 1; /* time is running */ 387 spinlock_t timer_lock; 388 /* -- next substream -- */ 389 snd_pcm_substream_t *next; 390 /* -- linked substreams -- */ 391 struct list_head link_list; /* linked list member */ 392 snd_pcm_group_t self_group; /* fake group for non linked substream (with substream lock inside) */ 393 snd_pcm_group_t *group; /* pointer to current group */ 394 /* -- assigned files -- */ 395 snd_pcm_file_t *file; 396 struct file *ffile; 397 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 398 /* -- OSS things -- */ 399 snd_pcm_oss_substream_t oss; 400 #endif 401 snd_info_entry_t *proc_root; 402 snd_info_entry_t *proc_info_entry; 403 snd_info_entry_t *proc_hw_params_entry; 404 snd_info_entry_t *proc_sw_params_entry; 405 snd_info_entry_t *proc_status_entry; 406 snd_info_entry_t *proc_prealloc_entry; 407 /* misc flags */ 408 unsigned int no_mmap_ctrl: 1; 409 }; 410 411 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 412 #define SUBSTREAM_BUSY(substream) ((substream)->file != NULL || ((substream)->oss.file != NULL)) 413 #else 414 #define SUBSTREAM_BUSY(substream) ((substream)->file != NULL) 415 #endif 416 417 418 struct _snd_pcm_str { 419 int stream; /* stream (direction) */ 420 snd_pcm_t *pcm; 421 /* -- substreams -- */ 422 unsigned int substream_count; 423 unsigned int substream_opened; 424 snd_pcm_substream_t *substream; 425 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 426 /* -- OSS things -- */ 427 snd_pcm_oss_stream_t oss; 428 #endif 429 snd_pcm_file_t *files; 430 snd_minor_t *reg; 431 snd_info_entry_t *proc_root; 432 snd_info_entry_t *proc_info_entry; 433 #ifdef CONFIG_SND_DEBUG 434 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ 435 snd_info_entry_t *proc_xrun_debug_entry; 436 #endif 437 }; 438 439 struct _snd_pcm { 440 snd_card_t *card; 441 unsigned int device; /* device number */ 442 unsigned int info_flags; 443 unsigned short dev_class; 444 unsigned short dev_subclass; 445 char id[64]; 446 char name[80]; 447 snd_pcm_str_t streams[2]; 448 struct semaphore open_mutex; 449 wait_queue_head_t open_wait; 450 void *private_data; 451 void (*private_free) (snd_pcm_t *pcm); 452 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 453 snd_pcm_oss_t oss; 454 #endif 455 }; 456 457 typedef struct _snd_pcm_notify { 458 int (*n_register) (snd_pcm_t * pcm); 459 int (*n_disconnect) (snd_pcm_t * pcm); 460 int (*n_unregister) (snd_pcm_t * pcm); 461 struct list_head list; 462 } snd_pcm_notify_t; 463 464 /* 465 * Registering 466 */ 467 468 extern snd_pcm_t *snd_pcm_devices[]; 469 extern snd_minor_t snd_pcm_reg[2]; 470 471 int snd_pcm_new(snd_card_t * card, char *id, int device, 472 int playback_count, int capture_count, 473 snd_pcm_t **rpcm); 474 int snd_pcm_new_stream(snd_pcm_t *pcm, int stream, int substream_count); 475 476 int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree); 477 478 /* 479 * Native I/O 480 */ 481 482 extern rwlock_t snd_pcm_link_rwlock; 483 484 int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info); 485 int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user *info); 486 int snd_pcm_status(snd_pcm_substream_t * substream, snd_pcm_status_t *status); 487 int snd_pcm_prepare(snd_pcm_substream_t *substream); 488 int snd_pcm_start(snd_pcm_substream_t *substream); 489 int snd_pcm_stop(snd_pcm_substream_t *substream, int status); 490 int snd_pcm_drain_done(snd_pcm_substream_t *substream); 491 #ifdef CONFIG_PM 492 int snd_pcm_suspend(snd_pcm_substream_t *substream); 493 int snd_pcm_suspend_all(snd_pcm_t *pcm); 494 #endif 495 int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg); 496 int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg); 497 int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg); 498 int snd_pcm_open_substream(snd_pcm_t *pcm, int stream, snd_pcm_substream_t **rsubstream); 499 void snd_pcm_release_substream(snd_pcm_substream_t *substream); 500 void snd_pcm_vma_notify_data(void *client, void *data); 501 int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file, struct vm_area_struct *area); 502 503 #if BITS_PER_LONG >= 64 504 505 static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) 506 { 507 *rem = *n % div; 508 *n /= div; 509 } 510 511 #elif defined(i386) 512 513 static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) 514 { 515 u_int32_t low, high; 516 low = *n & 0xffffffff; 517 high = *n >> 32; 518 if (high) { 519 u_int32_t high1 = high % div; 520 high /= div; 521 asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1)); 522 *n = (u_int64_t)high << 32 | low; 523 } else { 524 *n = low / div; 525 *rem = low % div; 526 } 527 } 528 #else 529 530 static inline void divl(u_int32_t high, u_int32_t low, 531 u_int32_t div, 532 u_int32_t *q, u_int32_t *r) 533 { 534 u_int64_t n = (u_int64_t)high << 32 | low; 535 u_int64_t d = (u_int64_t)div << 31; 536 u_int32_t q1 = 0; 537 int c = 32; 538 while (n > 0xffffffffU) { 539 q1 <<= 1; 540 if (n >= d) { 541 n -= d; 542 q1 |= 1; 543 } 544 d >>= 1; 545 c--; 546 } 547 q1 <<= c; 548 if (n) { 549 low = n; 550 *q = q1 | (low / div); 551 *r = low % div; 552 } else { 553 *r = 0; 554 *q = q1; 555 } 556 return; 557 } 558 559 static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) 560 { 561 u_int32_t low, high; 562 low = *n & 0xffffffff; 563 high = *n >> 32; 564 if (high) { 565 u_int32_t high1 = high % div; 566 u_int32_t low1 = low; 567 high /= div; 568 divl(high1, low1, div, &low, rem); 569 *n = (u_int64_t)high << 32 | low; 570 } else { 571 *n = low / div; 572 *rem = low % div; 573 } 574 } 575 #endif 576 577 /* 578 * PCM library 579 */ 580 581 static inline int snd_pcm_stream_linked(snd_pcm_substream_t *substream) 582 { 583 return substream->group != &substream->self_group; 584 } 585 586 static inline void snd_pcm_stream_lock(snd_pcm_substream_t *substream) 587 { 588 read_lock(&snd_pcm_link_rwlock); 589 spin_lock(&substream->self_group.lock); 590 } 591 592 static inline void snd_pcm_stream_unlock(snd_pcm_substream_t *substream) 593 { 594 spin_unlock(&substream->self_group.lock); 595 read_unlock(&snd_pcm_link_rwlock); 596 } 597 598 static inline void snd_pcm_stream_lock_irq(snd_pcm_substream_t *substream) 599 { 600 read_lock_irq(&snd_pcm_link_rwlock); 601 spin_lock(&substream->self_group.lock); 602 } 603 604 static inline void snd_pcm_stream_unlock_irq(snd_pcm_substream_t *substream) 605 { 606 spin_unlock(&substream->self_group.lock); 607 read_unlock_irq(&snd_pcm_link_rwlock); 608 } 609 610 #define snd_pcm_stream_lock_irqsave(substream, flags) \ 611 do { \ 612 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ 613 spin_lock(&substream->self_group.lock); \ 614 } while (0) 615 616 #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ 617 do { \ 618 spin_unlock(&substream->self_group.lock); \ 619 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ 620 } while (0) 621 622 #define snd_pcm_group_for_each(pos, substream) \ 623 list_for_each(pos, &substream->group->substreams) 624 625 #define snd_pcm_group_substream_entry(pos) \ 626 list_entry(pos, snd_pcm_substream_t, link_list) 627 628 static inline int snd_pcm_running(snd_pcm_substream_t *substream) 629 { 630 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || 631 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && 632 substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); 633 } 634 635 static inline ssize_t bytes_to_samples(snd_pcm_runtime_t *runtime, ssize_t size) 636 { 637 return size * 8 / runtime->sample_bits; 638 } 639 640 static inline snd_pcm_sframes_t bytes_to_frames(snd_pcm_runtime_t *runtime, ssize_t size) 641 { 642 return size * 8 / runtime->frame_bits; 643 } 644 645 static inline ssize_t samples_to_bytes(snd_pcm_runtime_t *runtime, ssize_t size) 646 { 647 return size * runtime->sample_bits / 8; 648 } 649 650 static inline ssize_t frames_to_bytes(snd_pcm_runtime_t *runtime, snd_pcm_sframes_t size) 651 { 652 return size * runtime->frame_bits / 8; 653 } 654 655 static inline int frame_aligned(snd_pcm_runtime_t *runtime, ssize_t bytes) 656 { 657 return bytes % runtime->byte_align == 0; 658 } 659 660 static inline size_t snd_pcm_lib_buffer_bytes(snd_pcm_substream_t *substream) 661 { 662 snd_pcm_runtime_t *runtime = substream->runtime; 663 return frames_to_bytes(runtime, runtime->buffer_size); 664 } 665 666 static inline size_t snd_pcm_lib_period_bytes(snd_pcm_substream_t *substream) 667 { 668 snd_pcm_runtime_t *runtime = substream->runtime; 669 return frames_to_bytes(runtime, runtime->period_size); 670 } 671 672 /* 673 * result is: 0 ... (boundary - 1) 674 */ 675 static inline snd_pcm_uframes_t snd_pcm_playback_avail(snd_pcm_runtime_t *runtime) 676 { 677 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; 678 if (avail < 0) 679 avail += runtime->boundary; 680 else if ((snd_pcm_uframes_t) avail >= runtime->boundary) 681 avail -= runtime->boundary; 682 return avail; 683 } 684 685 /* 686 * result is: 0 ... (boundary - 1) 687 */ 688 static inline snd_pcm_uframes_t snd_pcm_capture_avail(snd_pcm_runtime_t *runtime) 689 { 690 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; 691 if (avail < 0) 692 avail += runtime->boundary; 693 return avail; 694 } 695 696 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(snd_pcm_runtime_t *runtime) 697 { 698 return runtime->buffer_size - snd_pcm_playback_avail(runtime); 699 } 700 701 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(snd_pcm_runtime_t *runtime) 702 { 703 return runtime->buffer_size - snd_pcm_capture_avail(runtime); 704 } 705 706 /** 707 * snd_pcm_playback_ready - check whether the playback buffer is available 708 * @substream: the pcm substream instance 709 * 710 * Checks whether enough free space is available on the playback buffer. 711 * 712 * Returns non-zero if available, or zero if not. 713 */ 714 static inline int snd_pcm_playback_ready(snd_pcm_substream_t *substream) 715 { 716 snd_pcm_runtime_t *runtime = substream->runtime; 717 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; 718 } 719 720 /** 721 * snd_pcm_capture_ready - check whether the capture buffer is available 722 * @substream: the pcm substream instance 723 * 724 * Checks whether enough capture data is available on the capture buffer. 725 * 726 * Returns non-zero if available, or zero if not. 727 */ 728 static inline int snd_pcm_capture_ready(snd_pcm_substream_t *substream) 729 { 730 snd_pcm_runtime_t *runtime = substream->runtime; 731 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; 732 } 733 734 /** 735 * snd_pcm_playback_data - check whether any data exists on the playback buffer 736 * @substream: the pcm substream instance 737 * 738 * Checks whether any data exists on the playback buffer. If stop_threshold 739 * is bigger or equal to boundary, then this function returns always non-zero. 740 * 741 * Returns non-zero if exists, or zero if not. 742 */ 743 static inline int snd_pcm_playback_data(snd_pcm_substream_t *substream) 744 { 745 snd_pcm_runtime_t *runtime = substream->runtime; 746 747 if (runtime->stop_threshold >= runtime->boundary) 748 return 1; 749 return snd_pcm_playback_avail(runtime) < runtime->buffer_size; 750 } 751 752 /** 753 * snd_pcm_playback_empty - check whether the playback buffer is empty 754 * @substream: the pcm substream instance 755 * 756 * Checks whether the playback buffer is empty. 757 * 758 * Returns non-zero if empty, or zero if not. 759 */ 760 static inline int snd_pcm_playback_empty(snd_pcm_substream_t *substream) 761 { 762 snd_pcm_runtime_t *runtime = substream->runtime; 763 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; 764 } 765 766 /** 767 * snd_pcm_capture_empty - check whether the capture buffer is empty 768 * @substream: the pcm substream instance 769 * 770 * Checks whether the capture buffer is empty. 771 * 772 * Returns non-zero if empty, or zero if not. 773 */ 774 static inline int snd_pcm_capture_empty(snd_pcm_substream_t *substream) 775 { 776 snd_pcm_runtime_t *runtime = substream->runtime; 777 return snd_pcm_capture_avail(runtime) == 0; 778 } 779 780 static inline void snd_pcm_trigger_done(snd_pcm_substream_t *substream, 781 snd_pcm_substream_t *master) 782 { 783 substream->runtime->trigger_master = master; 784 } 785 786 static inline int hw_is_mask(int var) 787 { 788 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && 789 var <= SNDRV_PCM_HW_PARAM_LAST_MASK; 790 } 791 792 static inline int hw_is_interval(int var) 793 { 794 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && 795 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; 796 } 797 798 static inline snd_mask_t *hw_param_mask(snd_pcm_hw_params_t *params, 799 snd_pcm_hw_param_t var) 800 { 801 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 802 } 803 804 static inline snd_interval_t *hw_param_interval(snd_pcm_hw_params_t *params, 805 snd_pcm_hw_param_t var) 806 { 807 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 808 } 809 810 static inline const snd_mask_t *hw_param_mask_c(const snd_pcm_hw_params_t *params, 811 snd_pcm_hw_param_t var) 812 { 813 return (const snd_mask_t *)hw_param_mask((snd_pcm_hw_params_t*) params, var); 814 } 815 816 static inline const snd_interval_t *hw_param_interval_c(const snd_pcm_hw_params_t *params, 817 snd_pcm_hw_param_t var) 818 { 819 return (const snd_interval_t *)hw_param_interval((snd_pcm_hw_params_t*) params, var); 820 } 821 822 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) 823 #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) 824 #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) 825 #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min 826 #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min 827 #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min 828 #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) 829 #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min 830 #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min 831 #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min 832 #define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min 833 834 835 int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v); 836 void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c); 837 void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c); 838 void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b, 839 unsigned int k, snd_interval_t *c); 840 void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k, 841 const snd_interval_t *b, snd_interval_t *c); 842 int snd_interval_list(snd_interval_t *i, unsigned int count, unsigned int *list, unsigned int mask); 843 int snd_interval_ratnum(snd_interval_t *i, 844 unsigned int rats_count, ratnum_t *rats, 845 unsigned int *nump, unsigned int *denp); 846 847 void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params); 848 void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, snd_pcm_hw_param_t var); 849 int snd_pcm_hw_param_near(snd_pcm_substream_t *substream, 850 snd_pcm_hw_params_t *params, 851 snd_pcm_hw_param_t var, 852 unsigned int val, int *dir); 853 int snd_pcm_hw_param_set(snd_pcm_substream_t *pcm, 854 snd_pcm_hw_params_t *params, 855 snd_pcm_hw_param_t var, 856 unsigned int val, int dir); 857 int snd_pcm_hw_params_choose(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params); 858 859 int snd_pcm_hw_refine(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params); 860 861 int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream); 862 int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream); 863 864 int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var, 865 u_int32_t mask); 866 int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var, 867 u_int64_t mask); 868 int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var, 869 unsigned int min, unsigned int max); 870 int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var); 871 int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime, 872 unsigned int cond, 873 snd_pcm_hw_param_t var, 874 snd_pcm_hw_constraint_list_t *l); 875 int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime, 876 unsigned int cond, 877 snd_pcm_hw_param_t var, 878 snd_pcm_hw_constraint_ratnums_t *r); 879 int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime, 880 unsigned int cond, 881 snd_pcm_hw_param_t var, 882 snd_pcm_hw_constraint_ratdens_t *r); 883 int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime, 884 unsigned int cond, 885 unsigned int width, 886 unsigned int msbits); 887 int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime, 888 unsigned int cond, 889 snd_pcm_hw_param_t var, 890 unsigned long step); 891 int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime, 892 unsigned int cond, 893 snd_pcm_hw_param_t var); 894 int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime, 895 unsigned int cond, 896 int var, 897 snd_pcm_hw_rule_func_t func, void *private, 898 int dep, ...); 899 900 int snd_pcm_format_signed(snd_pcm_format_t format); 901 int snd_pcm_format_unsigned(snd_pcm_format_t format); 902 int snd_pcm_format_linear(snd_pcm_format_t format); 903 int snd_pcm_format_little_endian(snd_pcm_format_t format); 904 int snd_pcm_format_big_endian(snd_pcm_format_t format); 905 #if 0 /* just for DocBook */ 906 /** 907 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian 908 * @format: the format to check 909 * 910 * Returns 1 if the given PCM format is CPU-endian, 0 if 911 * opposite, or a negative error code if endian not specified. 912 */ 913 int snd_pcm_format_cpu_endian(snd_pcm_format_t format); 914 #endif /* DocBook */ 915 #ifdef SNDRV_LITTLE_ENDIAN 916 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) 917 #else 918 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) 919 #endif 920 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ 921 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ 922 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); 923 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); 924 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); 925 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); 926 const char *snd_pcm_format_name(snd_pcm_format_t format); 927 928 void snd_pcm_set_ops(snd_pcm_t * pcm, int direction, snd_pcm_ops_t *ops); 929 void snd_pcm_set_sync(snd_pcm_substream_t * substream); 930 int snd_pcm_lib_interleave_len(snd_pcm_substream_t *substream); 931 int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream, 932 unsigned int cmd, void *arg); 933 int snd_pcm_update_hw_ptr(snd_pcm_substream_t *substream); 934 int snd_pcm_playback_xrun_check(snd_pcm_substream_t *substream); 935 int snd_pcm_capture_xrun_check(snd_pcm_substream_t *substream); 936 int snd_pcm_playback_xrun_asap(snd_pcm_substream_t *substream); 937 int snd_pcm_capture_xrun_asap(snd_pcm_substream_t *substream); 938 void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t new_hw_ptr); 939 void snd_pcm_tick_prepare(snd_pcm_substream_t *substream); 940 void snd_pcm_tick_set(snd_pcm_substream_t *substream, unsigned long ticks); 941 void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream); 942 void snd_pcm_period_elapsed(snd_pcm_substream_t *substream); 943 snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream, 944 const void __user *buf, 945 snd_pcm_uframes_t frames); 946 snd_pcm_sframes_t snd_pcm_lib_read(snd_pcm_substream_t *substream, 947 void __user *buf, snd_pcm_uframes_t frames); 948 snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream, 949 void __user **bufs, snd_pcm_uframes_t frames); 950 snd_pcm_sframes_t snd_pcm_lib_readv(snd_pcm_substream_t *substream, 951 void __user **bufs, snd_pcm_uframes_t frames); 952 953 int snd_pcm_limit_hw_rates(snd_pcm_runtime_t *runtime); 954 955 static inline void snd_pcm_set_runtime_buffer(snd_pcm_substream_t *substream, 956 struct snd_dma_buffer *bufp) 957 { 958 snd_pcm_runtime_t *runtime = substream->runtime; 959 if (bufp) { 960 runtime->dma_buffer_p = bufp; 961 runtime->dma_area = bufp->area; 962 runtime->dma_addr = bufp->addr; 963 runtime->dma_bytes = bufp->bytes; 964 } else { 965 runtime->dma_buffer_p = NULL; 966 runtime->dma_area = NULL; 967 runtime->dma_addr = 0; 968 runtime->dma_bytes = 0; 969 } 970 } 971 972 /* 973 * Timer interface 974 */ 975 976 void snd_pcm_timer_resolution_change(snd_pcm_substream_t *substream); 977 void snd_pcm_timer_init(snd_pcm_substream_t * substream); 978 void snd_pcm_timer_done(snd_pcm_substream_t * substream); 979 980 /* 981 * Memory 982 */ 983 984 int snd_pcm_lib_preallocate_free(snd_pcm_substream_t *substream); 985 int snd_pcm_lib_preallocate_free_for_all(snd_pcm_t *pcm); 986 int snd_pcm_lib_preallocate_pages(snd_pcm_substream_t *substream, 987 int type, struct device *data, 988 size_t size, size_t max); 989 int snd_pcm_lib_preallocate_pages_for_all(snd_pcm_t *pcm, 990 int type, void *data, 991 size_t size, size_t max); 992 int snd_pcm_lib_malloc_pages(snd_pcm_substream_t *substream, size_t size); 993 int snd_pcm_lib_free_pages(snd_pcm_substream_t *substream); 994 995 #define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data) 996 #define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size) 997 #define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs) 998 struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset); 999 1000 /* handle mmap counter - PCM mmap callback should handle this counter properly */ 1001 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) 1002 { 1003 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; 1004 atomic_inc(&substream->runtime->mmap_count); 1005 } 1006 1007 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) 1008 { 1009 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; 1010 atomic_dec(&substream->runtime->mmap_count); 1011 } 1012 1013 /* mmap for io-memory area */ 1014 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 1015 #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP 1016 int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area); 1017 #else 1018 #define SNDRV_PCM_INFO_MMAP_IOMEM 0 1019 #define snd_pcm_lib_mmap_iomem NULL 1020 #endif 1021 1022 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) 1023 { 1024 *max = dma < 4 ? 64 * 1024 : 128 * 1024; 1025 } 1026 1027 /* 1028 * Misc 1029 */ 1030 1031 #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ 1032 (IEC958_AES1_CON_ORIGINAL<<8)|\ 1033 (IEC958_AES1_CON_PCM_CODER<<8)|\ 1034 (IEC958_AES3_CON_FS_48000<<24)) 1035 1036 #endif /* __SOUND_PCM_H */ 1037