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 snd_timestamp_t 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 int tstamp_timespec; /* use timeval (0) or timespec (1) */ 310 snd_pcm_tstamp_t tstamp_mode; /* mmap timestamp is updated */ 311 unsigned int period_step; 312 unsigned int sleep_min; /* min ticks to sleep */ 313 snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */ 314 snd_pcm_uframes_t start_threshold; 315 snd_pcm_uframes_t stop_threshold; 316 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when 317 noise is nearest than this */ 318 snd_pcm_uframes_t silence_size; /* Silence filling size */ 319 snd_pcm_uframes_t boundary; /* pointers wrap point */ 320 321 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ 322 snd_pcm_uframes_t silence_filled; /* size filled with silence */ 323 324 snd_pcm_sync_id_t sync; /* hardware synchronization ID */ 325 326 /* -- mmap -- */ 327 volatile snd_pcm_mmap_status_t *status; 328 volatile snd_pcm_mmap_control_t *control; 329 atomic_t mmap_count; 330 331 /* -- locking / scheduling -- */ 332 wait_queue_head_t sleep; 333 struct timer_list tick_timer; 334 struct fasync_struct *fasync; 335 336 /* -- private section -- */ 337 void *private_data; 338 void (*private_free)(snd_pcm_runtime_t *runtime); 339 340 /* -- hardware description -- */ 341 snd_pcm_hardware_t hw; 342 snd_pcm_hw_constraints_t hw_constraints; 343 344 /* -- interrupt callbacks -- */ 345 void (*transfer_ack_begin)(snd_pcm_substream_t *substream); 346 void (*transfer_ack_end)(snd_pcm_substream_t *substream); 347 348 /* -- timer -- */ 349 unsigned int timer_resolution; /* timer resolution */ 350 351 /* -- DMA -- */ 352 unsigned char *dma_area; /* DMA area */ 353 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ 354 size_t dma_bytes; /* size of DMA area */ 355 356 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ 357 358 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 359 /* -- OSS things -- */ 360 snd_pcm_oss_runtime_t oss; 361 #endif 362 }; 363 364 typedef struct _snd_pcm_group { /* keep linked substreams */ 365 spinlock_t lock; 366 struct list_head substreams; 367 int count; 368 } snd_pcm_group_t; 369 370 struct _snd_pcm_substream { 371 snd_pcm_t *pcm; 372 snd_pcm_str_t *pstr; 373 void *private_data; /* copied from pcm->private_data */ 374 int number; 375 char name[32]; /* substream name */ 376 int stream; /* stream (direction) */ 377 size_t buffer_bytes_max; /* limit ring buffer size */ 378 struct snd_dma_buffer dma_buffer; 379 unsigned int dma_buf_id; 380 size_t dma_max; 381 /* -- hardware operations -- */ 382 snd_pcm_ops_t *ops; 383 /* -- runtime information -- */ 384 snd_pcm_runtime_t *runtime; 385 /* -- timer section -- */ 386 snd_timer_t *timer; /* timer */ 387 unsigned timer_running: 1; /* time is running */ 388 spinlock_t timer_lock; 389 /* -- next substream -- */ 390 snd_pcm_substream_t *next; 391 /* -- linked substreams -- */ 392 struct list_head link_list; /* linked list member */ 393 snd_pcm_group_t self_group; /* fake group for non linked substream (with substream lock inside) */ 394 snd_pcm_group_t *group; /* pointer to current group */ 395 /* -- assigned files -- */ 396 snd_pcm_file_t *file; 397 struct file *ffile; 398 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 399 /* -- OSS things -- */ 400 snd_pcm_oss_substream_t oss; 401 #endif 402 snd_info_entry_t *proc_root; 403 snd_info_entry_t *proc_info_entry; 404 snd_info_entry_t *proc_hw_params_entry; 405 snd_info_entry_t *proc_sw_params_entry; 406 snd_info_entry_t *proc_status_entry; 407 snd_info_entry_t *proc_prealloc_entry; 408 /* misc flags */ 409 unsigned int no_mmap_ctrl: 1; 410 }; 411 412 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 413 #define SUBSTREAM_BUSY(substream) ((substream)->file != NULL || ((substream)->oss.file != NULL)) 414 #else 415 #define SUBSTREAM_BUSY(substream) ((substream)->file != NULL) 416 #endif 417 418 419 struct _snd_pcm_str { 420 int stream; /* stream (direction) */ 421 snd_pcm_t *pcm; 422 /* -- substreams -- */ 423 unsigned int substream_count; 424 unsigned int substream_opened; 425 snd_pcm_substream_t *substream; 426 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 427 /* -- OSS things -- */ 428 snd_pcm_oss_stream_t oss; 429 #endif 430 snd_pcm_file_t *files; 431 snd_minor_t *reg; 432 snd_info_entry_t *proc_root; 433 snd_info_entry_t *proc_info_entry; 434 #ifdef CONFIG_SND_DEBUG 435 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ 436 snd_info_entry_t *proc_xrun_debug_entry; 437 #endif 438 }; 439 440 struct _snd_pcm { 441 snd_card_t *card; 442 unsigned int device; /* device number */ 443 unsigned int info_flags; 444 unsigned short dev_class; 445 unsigned short dev_subclass; 446 char id[64]; 447 char name[80]; 448 snd_pcm_str_t streams[2]; 449 struct semaphore open_mutex; 450 wait_queue_head_t open_wait; 451 void *private_data; 452 void (*private_free) (snd_pcm_t *pcm); 453 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 454 snd_pcm_oss_t oss; 455 #endif 456 }; 457 458 typedef struct _snd_pcm_notify { 459 int (*n_register) (snd_pcm_t * pcm); 460 int (*n_disconnect) (snd_pcm_t * pcm); 461 int (*n_unregister) (snd_pcm_t * pcm); 462 struct list_head list; 463 } snd_pcm_notify_t; 464 465 /* 466 * Registering 467 */ 468 469 extern snd_pcm_t *snd_pcm_devices[]; 470 extern snd_minor_t snd_pcm_reg[2]; 471 472 int snd_pcm_new(snd_card_t * card, char *id, int device, 473 int playback_count, int capture_count, 474 snd_pcm_t **rpcm); 475 int snd_pcm_new_stream(snd_pcm_t *pcm, int stream, int substream_count); 476 477 int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree); 478 479 /* 480 * Native I/O 481 */ 482 483 extern rwlock_t snd_pcm_link_rwlock; 484 485 int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info); 486 int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user *info); 487 int snd_pcm_status(snd_pcm_substream_t * substream, snd_pcm_status_t *status); 488 int snd_pcm_prepare(snd_pcm_substream_t *substream); 489 int snd_pcm_start(snd_pcm_substream_t *substream); 490 int snd_pcm_stop(snd_pcm_substream_t *substream, int status); 491 int snd_pcm_drain_done(snd_pcm_substream_t *substream); 492 #ifdef CONFIG_PM 493 int snd_pcm_suspend(snd_pcm_substream_t *substream); 494 int snd_pcm_suspend_all(snd_pcm_t *pcm); 495 #endif 496 int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg); 497 int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg); 498 int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg); 499 int snd_pcm_open_substream(snd_pcm_t *pcm, int stream, snd_pcm_substream_t **rsubstream); 500 void snd_pcm_release_substream(snd_pcm_substream_t *substream); 501 void snd_pcm_vma_notify_data(void *client, void *data); 502 int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file, struct vm_area_struct *area); 503 504 #if BITS_PER_LONG >= 64 505 506 static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) 507 { 508 *rem = *n % div; 509 *n /= div; 510 } 511 512 #elif defined(i386) 513 514 static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) 515 { 516 u_int32_t low, high; 517 low = *n & 0xffffffff; 518 high = *n >> 32; 519 if (high) { 520 u_int32_t high1 = high % div; 521 high /= div; 522 asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1)); 523 *n = (u_int64_t)high << 32 | low; 524 } else { 525 *n = low / div; 526 *rem = low % div; 527 } 528 } 529 #else 530 531 static inline void divl(u_int32_t high, u_int32_t low, 532 u_int32_t div, 533 u_int32_t *q, u_int32_t *r) 534 { 535 u_int64_t n = (u_int64_t)high << 32 | low; 536 u_int64_t d = (u_int64_t)div << 31; 537 u_int32_t q1 = 0; 538 int c = 32; 539 while (n > 0xffffffffU) { 540 q1 <<= 1; 541 if (n >= d) { 542 n -= d; 543 q1 |= 1; 544 } 545 d >>= 1; 546 c--; 547 } 548 q1 <<= c; 549 if (n) { 550 low = n; 551 *q = q1 | (low / div); 552 *r = low % div; 553 } else { 554 *r = 0; 555 *q = q1; 556 } 557 return; 558 } 559 560 static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) 561 { 562 u_int32_t low, high; 563 low = *n & 0xffffffff; 564 high = *n >> 32; 565 if (high) { 566 u_int32_t high1 = high % div; 567 u_int32_t low1 = low; 568 high /= div; 569 divl(high1, low1, div, &low, rem); 570 *n = (u_int64_t)high << 32 | low; 571 } else { 572 *n = low / div; 573 *rem = low % div; 574 } 575 } 576 #endif 577 578 /* 579 * PCM library 580 */ 581 582 static inline int snd_pcm_stream_linked(snd_pcm_substream_t *substream) 583 { 584 return substream->group != &substream->self_group; 585 } 586 587 static inline void snd_pcm_stream_lock(snd_pcm_substream_t *substream) 588 { 589 read_lock(&snd_pcm_link_rwlock); 590 spin_lock(&substream->self_group.lock); 591 } 592 593 static inline void snd_pcm_stream_unlock(snd_pcm_substream_t *substream) 594 { 595 spin_unlock(&substream->self_group.lock); 596 read_unlock(&snd_pcm_link_rwlock); 597 } 598 599 static inline void snd_pcm_stream_lock_irq(snd_pcm_substream_t *substream) 600 { 601 read_lock_irq(&snd_pcm_link_rwlock); 602 spin_lock(&substream->self_group.lock); 603 } 604 605 static inline void snd_pcm_stream_unlock_irq(snd_pcm_substream_t *substream) 606 { 607 spin_unlock(&substream->self_group.lock); 608 read_unlock_irq(&snd_pcm_link_rwlock); 609 } 610 611 #define snd_pcm_stream_lock_irqsave(substream, flags) \ 612 do { \ 613 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ 614 spin_lock(&substream->self_group.lock); \ 615 } while (0) 616 617 #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ 618 do { \ 619 spin_unlock(&substream->self_group.lock); \ 620 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ 621 } while (0) 622 623 #define snd_pcm_group_for_each(pos, substream) \ 624 list_for_each(pos, &substream->group->substreams) 625 626 #define snd_pcm_group_substream_entry(pos) \ 627 list_entry(pos, snd_pcm_substream_t, link_list) 628 629 static inline int snd_pcm_running(snd_pcm_substream_t *substream) 630 { 631 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || 632 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && 633 substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); 634 } 635 636 static inline ssize_t bytes_to_samples(snd_pcm_runtime_t *runtime, ssize_t size) 637 { 638 return size * 8 / runtime->sample_bits; 639 } 640 641 static inline snd_pcm_sframes_t bytes_to_frames(snd_pcm_runtime_t *runtime, ssize_t size) 642 { 643 return size * 8 / runtime->frame_bits; 644 } 645 646 static inline ssize_t samples_to_bytes(snd_pcm_runtime_t *runtime, ssize_t size) 647 { 648 return size * runtime->sample_bits / 8; 649 } 650 651 static inline ssize_t frames_to_bytes(snd_pcm_runtime_t *runtime, snd_pcm_sframes_t size) 652 { 653 return size * runtime->frame_bits / 8; 654 } 655 656 static inline int frame_aligned(snd_pcm_runtime_t *runtime, ssize_t bytes) 657 { 658 return bytes % runtime->byte_align == 0; 659 } 660 661 static inline size_t snd_pcm_lib_buffer_bytes(snd_pcm_substream_t *substream) 662 { 663 snd_pcm_runtime_t *runtime = substream->runtime; 664 return frames_to_bytes(runtime, runtime->buffer_size); 665 } 666 667 static inline size_t snd_pcm_lib_period_bytes(snd_pcm_substream_t *substream) 668 { 669 snd_pcm_runtime_t *runtime = substream->runtime; 670 return frames_to_bytes(runtime, runtime->period_size); 671 } 672 673 /* 674 * result is: 0 ... (boundary - 1) 675 */ 676 static inline snd_pcm_uframes_t snd_pcm_playback_avail(snd_pcm_runtime_t *runtime) 677 { 678 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; 679 if (avail < 0) 680 avail += runtime->boundary; 681 else if ((snd_pcm_uframes_t) avail >= runtime->boundary) 682 avail -= runtime->boundary; 683 return avail; 684 } 685 686 /* 687 * result is: 0 ... (boundary - 1) 688 */ 689 static inline snd_pcm_uframes_t snd_pcm_capture_avail(snd_pcm_runtime_t *runtime) 690 { 691 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; 692 if (avail < 0) 693 avail += runtime->boundary; 694 return avail; 695 } 696 697 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(snd_pcm_runtime_t *runtime) 698 { 699 return runtime->buffer_size - snd_pcm_playback_avail(runtime); 700 } 701 702 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(snd_pcm_runtime_t *runtime) 703 { 704 return runtime->buffer_size - snd_pcm_capture_avail(runtime); 705 } 706 707 /** 708 * snd_pcm_playback_ready - check whether the playback buffer is available 709 * @substream: the pcm substream instance 710 * 711 * Checks whether enough free space is available on the playback buffer. 712 * 713 * Returns non-zero if available, or zero if not. 714 */ 715 static inline int snd_pcm_playback_ready(snd_pcm_substream_t *substream) 716 { 717 snd_pcm_runtime_t *runtime = substream->runtime; 718 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; 719 } 720 721 /** 722 * snd_pcm_capture_ready - check whether the capture buffer is available 723 * @substream: the pcm substream instance 724 * 725 * Checks whether enough capture data is available on the capture buffer. 726 * 727 * Returns non-zero if available, or zero if not. 728 */ 729 static inline int snd_pcm_capture_ready(snd_pcm_substream_t *substream) 730 { 731 snd_pcm_runtime_t *runtime = substream->runtime; 732 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; 733 } 734 735 /** 736 * snd_pcm_playback_data - check whether any data exists on the playback buffer 737 * @substream: the pcm substream instance 738 * 739 * Checks whether any data exists on the playback buffer. If stop_threshold 740 * is bigger or equal to boundary, then this function returns always non-zero. 741 * 742 * Returns non-zero if exists, or zero if not. 743 */ 744 static inline int snd_pcm_playback_data(snd_pcm_substream_t *substream) 745 { 746 snd_pcm_runtime_t *runtime = substream->runtime; 747 748 if (runtime->stop_threshold >= runtime->boundary) 749 return 1; 750 return snd_pcm_playback_avail(runtime) < runtime->buffer_size; 751 } 752 753 /** 754 * snd_pcm_playback_empty - check whether the playback buffer is empty 755 * @substream: the pcm substream instance 756 * 757 * Checks whether the playback buffer is empty. 758 * 759 * Returns non-zero if empty, or zero if not. 760 */ 761 static inline int snd_pcm_playback_empty(snd_pcm_substream_t *substream) 762 { 763 snd_pcm_runtime_t *runtime = substream->runtime; 764 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; 765 } 766 767 /** 768 * snd_pcm_capture_empty - check whether the capture buffer is empty 769 * @substream: the pcm substream instance 770 * 771 * Checks whether the capture buffer is empty. 772 * 773 * Returns non-zero if empty, or zero if not. 774 */ 775 static inline int snd_pcm_capture_empty(snd_pcm_substream_t *substream) 776 { 777 snd_pcm_runtime_t *runtime = substream->runtime; 778 return snd_pcm_capture_avail(runtime) == 0; 779 } 780 781 static inline void snd_pcm_trigger_done(snd_pcm_substream_t *substream, 782 snd_pcm_substream_t *master) 783 { 784 substream->runtime->trigger_master = master; 785 } 786 787 static inline int hw_is_mask(int var) 788 { 789 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && 790 var <= SNDRV_PCM_HW_PARAM_LAST_MASK; 791 } 792 793 static inline int hw_is_interval(int var) 794 { 795 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && 796 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; 797 } 798 799 static inline snd_mask_t *hw_param_mask(snd_pcm_hw_params_t *params, 800 snd_pcm_hw_param_t var) 801 { 802 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 803 } 804 805 static inline snd_interval_t *hw_param_interval(snd_pcm_hw_params_t *params, 806 snd_pcm_hw_param_t var) 807 { 808 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 809 } 810 811 static inline const snd_mask_t *hw_param_mask_c(const snd_pcm_hw_params_t *params, 812 snd_pcm_hw_param_t var) 813 { 814 return (const snd_mask_t *)hw_param_mask((snd_pcm_hw_params_t*) params, var); 815 } 816 817 static inline const snd_interval_t *hw_param_interval_c(const snd_pcm_hw_params_t *params, 818 snd_pcm_hw_param_t var) 819 { 820 return (const snd_interval_t *)hw_param_interval((snd_pcm_hw_params_t*) params, var); 821 } 822 823 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) 824 #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) 825 #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) 826 #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min 827 #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min 828 #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min 829 #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) 830 #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min 831 #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min 832 #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min 833 #define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min 834 835 836 int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v); 837 void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c); 838 void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c); 839 void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b, 840 unsigned int k, snd_interval_t *c); 841 void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k, 842 const snd_interval_t *b, snd_interval_t *c); 843 int snd_interval_list(snd_interval_t *i, unsigned int count, unsigned int *list, unsigned int mask); 844 int snd_interval_ratnum(snd_interval_t *i, 845 unsigned int rats_count, ratnum_t *rats, 846 unsigned int *nump, unsigned int *denp); 847 848 void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params); 849 void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, snd_pcm_hw_param_t var); 850 int snd_pcm_hw_param_near(snd_pcm_substream_t *substream, 851 snd_pcm_hw_params_t *params, 852 snd_pcm_hw_param_t var, 853 unsigned int val, int *dir); 854 int snd_pcm_hw_param_set(snd_pcm_substream_t *pcm, 855 snd_pcm_hw_params_t *params, 856 snd_pcm_hw_param_t var, 857 unsigned int val, int dir); 858 int snd_pcm_hw_params_choose(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params); 859 860 int snd_pcm_hw_refine(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params); 861 862 int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream); 863 int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream); 864 865 int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var, 866 u_int32_t mask); 867 int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var, 868 u_int64_t mask); 869 int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var, 870 unsigned int min, unsigned int max); 871 int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var); 872 int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime, 873 unsigned int cond, 874 snd_pcm_hw_param_t var, 875 snd_pcm_hw_constraint_list_t *l); 876 int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime, 877 unsigned int cond, 878 snd_pcm_hw_param_t var, 879 snd_pcm_hw_constraint_ratnums_t *r); 880 int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime, 881 unsigned int cond, 882 snd_pcm_hw_param_t var, 883 snd_pcm_hw_constraint_ratdens_t *r); 884 int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime, 885 unsigned int cond, 886 unsigned int width, 887 unsigned int msbits); 888 int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime, 889 unsigned int cond, 890 snd_pcm_hw_param_t var, 891 unsigned long step); 892 int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime, 893 unsigned int cond, 894 snd_pcm_hw_param_t var); 895 int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime, 896 unsigned int cond, 897 int var, 898 snd_pcm_hw_rule_func_t func, void *private, 899 int dep, ...); 900 901 int snd_pcm_format_signed(snd_pcm_format_t format); 902 int snd_pcm_format_unsigned(snd_pcm_format_t format); 903 int snd_pcm_format_linear(snd_pcm_format_t format); 904 int snd_pcm_format_little_endian(snd_pcm_format_t format); 905 int snd_pcm_format_big_endian(snd_pcm_format_t format); 906 #if 0 /* just for DocBook */ 907 /** 908 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian 909 * @format: the format to check 910 * 911 * Returns 1 if the given PCM format is CPU-endian, 0 if 912 * opposite, or a negative error code if endian not specified. 913 */ 914 int snd_pcm_format_cpu_endian(snd_pcm_format_t format); 915 #endif /* DocBook */ 916 #ifdef SNDRV_LITTLE_ENDIAN 917 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) 918 #else 919 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) 920 #endif 921 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ 922 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ 923 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); 924 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); 925 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); 926 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); 927 const char *snd_pcm_format_name(snd_pcm_format_t format); 928 929 void snd_pcm_set_ops(snd_pcm_t * pcm, int direction, snd_pcm_ops_t *ops); 930 void snd_pcm_set_sync(snd_pcm_substream_t * substream); 931 int snd_pcm_lib_interleave_len(snd_pcm_substream_t *substream); 932 int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream, 933 unsigned int cmd, void *arg); 934 int snd_pcm_update_hw_ptr(snd_pcm_substream_t *substream); 935 int snd_pcm_playback_xrun_check(snd_pcm_substream_t *substream); 936 int snd_pcm_capture_xrun_check(snd_pcm_substream_t *substream); 937 int snd_pcm_playback_xrun_asap(snd_pcm_substream_t *substream); 938 int snd_pcm_capture_xrun_asap(snd_pcm_substream_t *substream); 939 void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t new_hw_ptr); 940 void snd_pcm_tick_prepare(snd_pcm_substream_t *substream); 941 void snd_pcm_tick_set(snd_pcm_substream_t *substream, unsigned long ticks); 942 void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream); 943 void snd_pcm_period_elapsed(snd_pcm_substream_t *substream); 944 snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream, 945 const void __user *buf, 946 snd_pcm_uframes_t frames); 947 snd_pcm_sframes_t snd_pcm_lib_read(snd_pcm_substream_t *substream, 948 void __user *buf, snd_pcm_uframes_t frames); 949 snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream, 950 void __user **bufs, snd_pcm_uframes_t frames); 951 snd_pcm_sframes_t snd_pcm_lib_readv(snd_pcm_substream_t *substream, 952 void __user **bufs, snd_pcm_uframes_t frames); 953 954 int snd_pcm_limit_hw_rates(snd_pcm_runtime_t *runtime); 955 956 static inline void snd_pcm_set_runtime_buffer(snd_pcm_substream_t *substream, 957 struct snd_dma_buffer *bufp) 958 { 959 snd_pcm_runtime_t *runtime = substream->runtime; 960 if (bufp) { 961 runtime->dma_buffer_p = bufp; 962 runtime->dma_area = bufp->area; 963 runtime->dma_addr = bufp->addr; 964 runtime->dma_bytes = bufp->bytes; 965 } else { 966 runtime->dma_buffer_p = NULL; 967 runtime->dma_area = NULL; 968 runtime->dma_addr = 0; 969 runtime->dma_bytes = 0; 970 } 971 } 972 973 /* 974 * Timer interface 975 */ 976 977 void snd_pcm_timer_resolution_change(snd_pcm_substream_t *substream); 978 void snd_pcm_timer_init(snd_pcm_substream_t * substream); 979 void snd_pcm_timer_done(snd_pcm_substream_t * substream); 980 981 /* 982 * Memory 983 */ 984 985 int snd_pcm_lib_preallocate_free(snd_pcm_substream_t *substream); 986 int snd_pcm_lib_preallocate_free_for_all(snd_pcm_t *pcm); 987 int snd_pcm_lib_preallocate_pages(snd_pcm_substream_t *substream, 988 int type, struct device *data, 989 size_t size, size_t max); 990 int snd_pcm_lib_preallocate_pages_for_all(snd_pcm_t *pcm, 991 int type, void *data, 992 size_t size, size_t max); 993 int snd_pcm_lib_malloc_pages(snd_pcm_substream_t *substream, size_t size); 994 int snd_pcm_lib_free_pages(snd_pcm_substream_t *substream); 995 996 #define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data) 997 #define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size) 998 #define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs) 999 struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset); 1000 1001 /* handle mmap counter - PCM mmap callback should handle this counter properly */ 1002 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) 1003 { 1004 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; 1005 atomic_inc(&substream->runtime->mmap_count); 1006 } 1007 1008 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) 1009 { 1010 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; 1011 atomic_dec(&substream->runtime->mmap_count); 1012 } 1013 1014 /* mmap for io-memory area */ 1015 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 1016 #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP 1017 int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area); 1018 #else 1019 #define SNDRV_PCM_INFO_MMAP_IOMEM 0 1020 #define snd_pcm_lib_mmap_iomem NULL 1021 #endif 1022 1023 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) 1024 { 1025 *max = dma < 4 ? 64 * 1024 : 128 * 1024; 1026 } 1027 1028 /* 1029 * Misc 1030 */ 1031 1032 #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ 1033 (IEC958_AES1_CON_ORIGINAL<<8)|\ 1034 (IEC958_AES1_CON_PCM_CODER<<8)|\ 1035 (IEC958_AES3_CON_FS_48000<<24)) 1036 1037 #endif /* __SOUND_PCM_H */ 1038