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Merge branch 'core-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.git] / include / sound / pcm.h
CommitLineData
1da177e4
LT		 1#ifndef __SOUND_PCM_H
2#define __SOUND_PCM_H
3
4/*
5 * Digital Audio (PCM) abstract layer
c1017a4c 6 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 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>
f90c06a2 28#include <sound/minors.h>
1da177e4 29#include <linux/poll.h>
f23f6e08 30#include <linux/mm.h>
1da177e4
LT		 31#include <linux/bitops.h>
32
1da177e4
LT		 33#define snd_pcm_substream_chip(substream) ((substream)->private_data)
34#define snd_pcm_chip(pcm) ((pcm)->private_data)
35
1da177e4
LT		 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
877211f5 44struct snd_pcm_hardware {
1da177e4
LT		 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 */
877211f5 58};
1da177e4 59
e0e6ce03
RD		 60struct snd_pcm_substream;
61
877211f5
TI		 62struct 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,
1da177e4 66 unsigned int cmd, void *arg);
877211f5
TI		 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,
1da177e4 75 void __user *buf, snd_pcm_uframes_t count);
877211f5 76 int (*silence)(struct snd_pcm_substream *substream, int channel,
1da177e4 77 snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
877211f5
TI		 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};
1da177e4
LT		 83
84/*
85 *
86 */
87
f90c06a2
PM		 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
896e6cc2 93
1da177e4
LT		 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
102#define SNDRV_PCM_TRIGGER_STOP 0
103#define SNDRV_PCM_TRIGGER_START 1
104#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
105#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
106#define SNDRV_PCM_TRIGGER_SUSPEND 5
107#define SNDRV_PCM_TRIGGER_RESUME 6
108
109#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
110
111/* If you change this don't forget to change rates[] table in pcm_native.c */
112#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
113#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
114#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
115#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
116#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
117#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
118#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
119#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
120#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
121#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
122#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
123#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
124#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
125
126#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
127#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
128
129#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
130 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
131 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
132#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
133#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
134 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
135#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
136 SNDRV_PCM_RATE_192000)
137#define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8)
138#define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8)
139#define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE)
140#define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE)
141#define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE)
142#define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE)
143#define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE)
144#define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE)
145#define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE)
146#define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE)
147#define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE)
148#define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE)
149#define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE)
150#define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE)
151#define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
152#define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
153#define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
154#define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
155#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
156#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
157#define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
158#define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW)
159#define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
160#define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG)
161#define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM)
162#define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
163#define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
164#define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
165#define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
166#define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
167#define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
168#define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
169#define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
170#define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
171#define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
172#define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
173#define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
174#define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
175
176#ifdef SNDRV_LITTLE_ENDIAN
177#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
178#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
179#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
180#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
181#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
182#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
183#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
184#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
185#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
186#endif
187#ifdef SNDRV_BIG_ENDIAN
188#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
189#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
190#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
191#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
192#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
193#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
194#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
195#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
196#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
197#endif
198
877211f5
TI		 199struct snd_pcm_file {
200 struct snd_pcm_substream *substream;
548a648b 201 int no_compat_mmap;
1da177e4
LT		 202};
203
877211f5
TI		 204struct snd_pcm_hw_rule;
205typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
206 struct snd_pcm_hw_rule *rule);
1da177e4 207
877211f5 208struct snd_pcm_hw_rule {
1da177e4
LT		 209 unsigned int cond;
210 snd_pcm_hw_rule_func_t func;
211 int var;
212 int deps[4];
213 void *private;
214};
215
877211f5
TI		 216struct snd_pcm_hw_constraints {
217 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
1da177e4 218 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
877211f5 219 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
1da177e4
LT		 220 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
221 unsigned int rules_num;
222 unsigned int rules_all;
877211f5
TI		 223 struct snd_pcm_hw_rule *rules;
224};
1da177e4 225
877211f5
TI		 226static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
227 snd_pcm_hw_param_t var)
1da177e4
LT		 228{
229 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
230}
231
877211f5
TI		 232static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
233 snd_pcm_hw_param_t var)
1da177e4
LT		 234{
235 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
236}
237
877211f5 238struct snd_ratnum {
1da177e4
LT		 239 unsigned int num;
240 unsigned int den_min, den_max, den_step;
877211f5 241};
1da177e4 242
877211f5 243struct snd_ratden {
1da177e4
LT		 244 unsigned int num_min, num_max, num_step;
245 unsigned int den;
877211f5 246};
1da177e4 247
877211f5 248struct snd_pcm_hw_constraint_ratnums {
1da177e4 249 int nrats;
877211f5
TI		 250 struct snd_ratnum *rats;
251};
1da177e4 252
877211f5 253struct snd_pcm_hw_constraint_ratdens {
1da177e4 254 int nrats;
877211f5
TI		 255 struct snd_ratden *rats;
256};
1da177e4 257
877211f5 258struct snd_pcm_hw_constraint_list {
1da177e4
LT		 259 unsigned int count;
260 unsigned int *list;
261 unsigned int mask;
877211f5 262};
1da177e4 263
877211f5 264struct snd_pcm_runtime {
1da177e4 265 /* -- Status -- */
877211f5 266 struct snd_pcm_substream *trigger_master;
07799e75 267 struct timespec trigger_tstamp; /* trigger timestamp */
1da177e4
LT		 268 int overrange;
269 snd_pcm_uframes_t avail_max;
270 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
271 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/
272
273 /* -- HW params -- */
274 snd_pcm_access_t access; /* access mode */
275 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
276 snd_pcm_subformat_t subformat; /* subformat */
277 unsigned int rate; /* rate in Hz */
278 unsigned int channels; /* channels */
279 snd_pcm_uframes_t period_size; /* period size */
280 unsigned int periods; /* periods */
281 snd_pcm_uframes_t buffer_size; /* buffer size */
1da177e4
LT		 282 snd_pcm_uframes_t min_align; /* Min alignment for the format */
283 size_t byte_align;
284 unsigned int frame_bits;
285 unsigned int sample_bits;
286 unsigned int info;
287 unsigned int rate_num;
288 unsigned int rate_den;
289
290 /* -- SW params -- */
877211f5 291 int tstamp_mode; /* mmap timestamp is updated */
1da177e4 292 unsigned int period_step;
1da177e4
LT		 293 snd_pcm_uframes_t start_threshold;
294 snd_pcm_uframes_t stop_threshold;
295 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
296 noise is nearest than this */
297 snd_pcm_uframes_t silence_size; /* Silence filling size */
298 snd_pcm_uframes_t boundary; /* pointers wrap point */
299
300 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
301 snd_pcm_uframes_t silence_filled; /* size filled with silence */
302
877211f5 303 union snd_pcm_sync_id sync; /* hardware synchronization ID */
1da177e4
LT		 304
305 /* -- mmap -- */
503fc85a
TI		 306 struct snd_pcm_mmap_status *status;
307 struct snd_pcm_mmap_control *control;
1da177e4
LT		 308
309 /* -- locking / scheduling -- */
310 wait_queue_head_t sleep;
1da177e4
LT		 311 struct fasync_struct *fasync;
312
313 /* -- private section -- */
314 void *private_data;
877211f5 315 void (*private_free)(struct snd_pcm_runtime *runtime);
1da177e4
LT		 316
317 /* -- hardware description -- */
877211f5
TI		 318 struct snd_pcm_hardware hw;
319 struct snd_pcm_hw_constraints hw_constraints;
1da177e4
LT		 320
321 /* -- interrupt callbacks -- */
877211f5
TI		 322 void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
323 void (*transfer_ack_end)(struct snd_pcm_substream *substream);
1da177e4
LT		 324
325 /* -- timer -- */
326 unsigned int timer_resolution; /* timer resolution */
b751eef1 327 int tstamp_type; /* timestamp type */
1da177e4
LT		 328
329 /* -- DMA -- */
330 unsigned char *dma_area; /* DMA area */
331 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
332 size_t dma_bytes; /* size of DMA area */
333
334 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
335
336#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
337 /* -- OSS things -- */
877211f5 338 struct snd_pcm_oss_runtime oss;
1da177e4
LT		 339#endif
340};
341
877211f5 342struct snd_pcm_group { /* keep linked substreams */
1da177e4
LT		 343 spinlock_t lock;
344 struct list_head substreams;
345 int count;
877211f5 346};
1da177e4 347
877211f5
TI		 348struct snd_pcm_substream {
349 struct snd_pcm *pcm;
350 struct snd_pcm_str *pstr;
1da177e4
LT		 351 void *private_data; /* copied from pcm->private_data */
352 int number;
353 char name[32]; /* substream name */
354 int stream; /* stream (direction) */
9442e691 355 char latency_id[20]; /* latency identifier */
1da177e4
LT		 356 size_t buffer_bytes_max; /* limit ring buffer size */
357 struct snd_dma_buffer dma_buffer;
358 unsigned int dma_buf_id;
359 size_t dma_max;
360 /* -- hardware operations -- */
877211f5 361 struct snd_pcm_ops *ops;
1da177e4 362 /* -- runtime information -- */
877211f5 363 struct snd_pcm_runtime *runtime;
1da177e4 364 /* -- timer section -- */
877211f5 365 struct snd_timer *timer; /* timer */
1da177e4 366 unsigned timer_running: 1; /* time is running */
1da177e4 367 /* -- next substream -- */
877211f5 368 struct snd_pcm_substream *next;
1da177e4
LT		 369 /* -- linked substreams -- */
370 struct list_head link_list; /* linked list member */
877211f5
TI		 371 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
372 struct snd_pcm_group *group; /* pointer to current group */
1da177e4 373 /* -- assigned files -- */
1576274d 374 void *file;
0df63e44 375 int ref_count;
9c323fcb 376 atomic_t mmap_count;
0df63e44 377 unsigned int f_flags;
3bf75f9b 378 void (*pcm_release)(struct snd_pcm_substream *);
1da177e4
LT		 379#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
380 /* -- OSS things -- */
877211f5 381 struct snd_pcm_oss_substream oss;
1da177e4 382#endif
b7d90a35 383#ifdef CONFIG_SND_VERBOSE_PROCFS
877211f5
TI		 384 struct snd_info_entry *proc_root;
385 struct snd_info_entry *proc_info_entry;
386 struct snd_info_entry *proc_hw_params_entry;
387 struct snd_info_entry *proc_sw_params_entry;
388 struct snd_info_entry *proc_status_entry;
389 struct snd_info_entry *proc_prealloc_entry;
c7132aeb 390 struct snd_info_entry *proc_prealloc_max_entry;
b7d90a35 391#endif
1da177e4 392 /* misc flags */
3bf75f9b 393 unsigned int hw_opened: 1;
1da177e4
LT		 394};
395
0df63e44 396#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
1da177e4
LT		 397
398
877211f5 399struct snd_pcm_str {
1da177e4 400 int stream; /* stream (direction) */
877211f5 401 struct snd_pcm *pcm;
1da177e4
LT		 402 /* -- substreams -- */
403 unsigned int substream_count;
404 unsigned int substream_opened;
877211f5 405 struct snd_pcm_substream *substream;
1da177e4
LT		 406#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
407 /* -- OSS things -- */
877211f5 408 struct snd_pcm_oss_stream oss;
1da177e4 409#endif
b7d90a35 410#ifdef CONFIG_SND_VERBOSE_PROCFS
877211f5
TI		 411 struct snd_info_entry *proc_root;
412 struct snd_info_entry *proc_info_entry;
b7d90a35 413#ifdef CONFIG_SND_PCM_XRUN_DEBUG
1da177e4 414 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
877211f5 415 struct snd_info_entry *proc_xrun_debug_entry;
1da177e4 416#endif
b7d90a35 417#endif
1da177e4
LT		 418};
419
877211f5
TI		 420struct snd_pcm {
421 struct snd_card *card;
f87135f5 422 struct list_head list;
f90c06a2 423 int device; /* device number */
1da177e4
LT		 424 unsigned int info_flags;
425 unsigned short dev_class;
426 unsigned short dev_subclass;
427 char id[64];
428 char name[80];
877211f5 429 struct snd_pcm_str streams[2];
1a60d4c5 430 struct mutex open_mutex;
1da177e4
LT		 431 wait_queue_head_t open_wait;
432 void *private_data;
877211f5 433 void (*private_free) (struct snd_pcm *pcm);
c78085fc 434 struct device *dev; /* actual hw device this belongs to */
1da177e4 435#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
877211f5 436 struct snd_pcm_oss oss;
1da177e4
LT		 437#endif
438};
439
877211f5
TI		 440struct snd_pcm_notify {
441 int (*n_register) (struct snd_pcm * pcm);
442 int (*n_disconnect) (struct snd_pcm * pcm);
443 int (*n_unregister) (struct snd_pcm * pcm);
1da177e4 444 struct list_head list;
877211f5 445};
1da177e4
LT		 446
447/*
448 * Registering
449 */
450
54047320 451extern const struct file_operations snd_pcm_f_ops[2];
1da177e4 452
e6161653 453int snd_pcm_new(struct snd_card *card, const char *id, int device,
1da177e4 454 int playback_count, int capture_count,
877211f5
TI		 455 struct snd_pcm **rpcm);
456int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
1da177e4 457
877211f5 458int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
1da177e4
LT		 459
460/*
461 * Native I/O
462 */
463
464extern rwlock_t snd_pcm_link_rwlock;
465
877211f5
TI		 466int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
467int snd_pcm_info_user(struct snd_pcm_substream *substream,
468 struct snd_pcm_info __user *info);
469int snd_pcm_status(struct snd_pcm_substream *substream,
470 struct snd_pcm_status *status);
877211f5
TI		 471int snd_pcm_start(struct snd_pcm_substream *substream);
472int snd_pcm_stop(struct snd_pcm_substream *substream, int status);
473int snd_pcm_drain_done(struct snd_pcm_substream *substream);
1da177e4 474#ifdef CONFIG_PM
877211f5
TI		 475int snd_pcm_suspend(struct snd_pcm_substream *substream);
476int snd_pcm_suspend_all(struct snd_pcm *pcm);
1da177e4 477#endif
877211f5 478int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
3bf75f9b
TI		 479int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
480 struct snd_pcm_substream **rsubstream);
877211f5 481void snd_pcm_release_substream(struct snd_pcm_substream *substream);
3bf75f9b
TI		 482int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
483 struct snd_pcm_substream **rsubstream);
484void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
1da177e4 485void snd_pcm_vma_notify_data(void *client, void *data);
877211f5 486int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
1da177e4
LT		 487
488#if BITS_PER_LONG >= 64
489
490static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
491{
492 *rem = *n % div;
493 *n /= div;
494}
495
496#elif defined(i386)
497
498static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
499{
500 u_int32_t low, high;
501 low = *n & 0xffffffff;
502 high = *n >> 32;
503 if (high) {
504 u_int32_t high1 = high % div;
505 high /= div;
506 asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
507 *n = (u_int64_t)high << 32 | low;
508 } else {
509 *n = low / div;
510 *rem = low % div;
511 }
512}
513#else
514
515static inline void divl(u_int32_t high, u_int32_t low,
516 u_int32_t div,
517 u_int32_t *q, u_int32_t *r)
518{
519 u_int64_t n = (u_int64_t)high << 32 | low;
520 u_int64_t d = (u_int64_t)div << 31;
521 u_int32_t q1 = 0;
522 int c = 32;
523 while (n > 0xffffffffU) {
524 q1 <<= 1;
525 if (n >= d) {
526 n -= d;
527 q1 |= 1;
528 }
529 d >>= 1;
530 c--;
531 }
532 q1 <<= c;
533 if (n) {
534 low = n;
535 *q = q1 | (low / div);
536 *r = low % div;
537 } else {
538 *r = 0;
539 *q = q1;
540 }
541 return;
542}
543
544static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
545{
546 u_int32_t low, high;
547 low = *n & 0xffffffff;
548 high = *n >> 32;
549 if (high) {
550 u_int32_t high1 = high % div;
551 u_int32_t low1 = low;
552 high /= div;
553 divl(high1, low1, div, &low, rem);
554 *n = (u_int64_t)high << 32 | low;
555 } else {
556 *n = low / div;
557 *rem = low % div;
558 }
559}
560#endif
561
562/*
563 * PCM library
564 */
565
877211f5 566static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
1da177e4
LT		 567{
568 return substream->group != &substream->self_group;
569}
570
877211f5 571static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
1da177e4
LT		 572{
573 read_lock(&snd_pcm_link_rwlock);
574 spin_lock(&substream->self_group.lock);
575}
576
877211f5 577static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
1da177e4
LT		 578{
579 spin_unlock(&substream->self_group.lock);
580 read_unlock(&snd_pcm_link_rwlock);
581}
582
877211f5 583static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
1da177e4
LT		 584{
585 read_lock_irq(&snd_pcm_link_rwlock);
586 spin_lock(&substream->self_group.lock);
587}
588
877211f5 589static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
1da177e4
LT		 590{
591 spin_unlock(&substream->self_group.lock);
592 read_unlock_irq(&snd_pcm_link_rwlock);
593}
594
595#define snd_pcm_stream_lock_irqsave(substream, flags) \
596do { \
597 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
598 spin_lock(&substream->self_group.lock); \
599} while (0)
600
601#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
602do { \
603 spin_unlock(&substream->self_group.lock); \
604 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
605} while (0)
606
ef991b95
TI		 607#define snd_pcm_group_for_each_entry(s, substream) \
608 list_for_each_entry(s, &substream->group->substreams, link_list)
1da177e4 609
877211f5 610static inline int snd_pcm_running(struct snd_pcm_substream *substream)
1da177e4
LT		 611{
612 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
613 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
614 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
615}
616
877211f5 617static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 618{
619 return size * 8 / runtime->sample_bits;
620}
621
877211f5 622static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 623{
624 return size * 8 / runtime->frame_bits;
625}
626
877211f5 627static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 628{
629 return size * runtime->sample_bits / 8;
630}
631
877211f5 632static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
1da177e4
LT		 633{
634 return size * runtime->frame_bits / 8;
635}
636
877211f5 637static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
1da177e4
LT		 638{
639 return bytes % runtime->byte_align == 0;
640}
641
877211f5 642static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
1da177e4 643{
877211f5 644 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 645 return frames_to_bytes(runtime, runtime->buffer_size);
646}
647
877211f5 648static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
1da177e4 649{
877211f5 650 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 651 return frames_to_bytes(runtime, runtime->period_size);
652}
653
654/*
655 * result is: 0 ... (boundary - 1)
656 */
877211f5 657static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 658{
659 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
660 if (avail < 0)
661 avail += runtime->boundary;
662 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
663 avail -= runtime->boundary;
664 return avail;
665}
666
667/*
668 * result is: 0 ... (boundary - 1)
669 */
877211f5 670static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 671{
672 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
673 if (avail < 0)
674 avail += runtime->boundary;
675 return avail;
676}
677
877211f5 678static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 679{
680 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
681}
682
877211f5 683static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 684{
685 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
686}
687
688/**
689 * snd_pcm_playback_ready - check whether the playback buffer is available
690 * @substream: the pcm substream instance
691 *
692 * Checks whether enough free space is available on the playback buffer.
693 *
694 * Returns non-zero if available, or zero if not.
695 */
877211f5 696static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
1da177e4 697{
877211f5 698 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 699 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
700}
701
702/**
703 * snd_pcm_capture_ready - check whether the capture buffer is available
704 * @substream: the pcm substream instance
705 *
706 * Checks whether enough capture data is available on the capture buffer.
707 *
708 * Returns non-zero if available, or zero if not.
709 */
877211f5 710static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
1da177e4 711{
877211f5 712 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 713 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
714}
715
716/**
717 * snd_pcm_playback_data - check whether any data exists on the playback buffer
718 * @substream: the pcm substream instance
719 *
720 * Checks whether any data exists on the playback buffer. If stop_threshold
721 * is bigger or equal to boundary, then this function returns always non-zero.
722 *
723 * Returns non-zero if exists, or zero if not.
724 */
877211f5 725static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
1da177e4 726{
877211f5 727 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 728
729 if (runtime->stop_threshold >= runtime->boundary)
730 return 1;
731 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
732}
733
734/**
735 * snd_pcm_playback_empty - check whether the playback buffer is empty
736 * @substream: the pcm substream instance
737 *
738 * Checks whether the playback buffer is empty.
739 *
740 * Returns non-zero if empty, or zero if not.
741 */
877211f5 742static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
1da177e4 743{
877211f5 744 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 745 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
746}
747
748/**
749 * snd_pcm_capture_empty - check whether the capture buffer is empty
750 * @substream: the pcm substream instance
751 *
752 * Checks whether the capture buffer is empty.
753 *
754 * Returns non-zero if empty, or zero if not.
755 */
877211f5 756static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
1da177e4 757{
877211f5 758 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 759 return snd_pcm_capture_avail(runtime) == 0;
760}
761
877211f5
TI		 762static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
763 struct snd_pcm_substream *master)
1da177e4
LT		 764{
765 substream->runtime->trigger_master = master;
766}
767
768static inline int hw_is_mask(int var)
769{
770 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
771 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
772}
773
774static inline int hw_is_interval(int var)
775{
776 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
777 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
778}
779
877211f5 780static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
1da177e4
LT		 781 snd_pcm_hw_param_t var)
782{
783 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
784}
785
877211f5 786static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
1da177e4
LT		 787 snd_pcm_hw_param_t var)
788{
789 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
790}
791
877211f5 792static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 793 snd_pcm_hw_param_t var)
794{
b9f09a48 795 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
1da177e4
LT		 796}
797
877211f5 798static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 799 snd_pcm_hw_param_t var)
800{
b9f09a48 801 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
1da177e4
LT		 802}
803
804#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
805#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
806#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
807#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
808#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
809#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
810#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
811#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
812#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
813#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
1da177e4
LT		 814
815
877211f5
TI		 816int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
817void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
818void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
819void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
820 unsigned int k, struct snd_interval *c);
821void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
822 const struct snd_interval *b, struct snd_interval *c);
823int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask);
824int snd_interval_ratnum(struct snd_interval *i,
825 unsigned int rats_count, struct snd_ratnum *rats,
1da177e4
LT		 826 unsigned int *nump, unsigned int *denp);
827
877211f5
TI		 828void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
829void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
877211f5 830int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 831
877211f5 832int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 833
877211f5
TI		 834int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
835int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
1da177e4 836
877211f5 837int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 838 u_int32_t mask);
877211f5 839int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 840 u_int64_t mask);
877211f5 841int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 842 unsigned int min, unsigned int max);
877211f5
TI		 843int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
844int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
1da177e4
LT		 845 unsigned int cond,
846 snd_pcm_hw_param_t var,
877211f5
TI		 847 struct snd_pcm_hw_constraint_list *l);
848int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
1da177e4
LT		 849 unsigned int cond,
850 snd_pcm_hw_param_t var,
877211f5
TI		 851 struct snd_pcm_hw_constraint_ratnums *r);
852int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
1da177e4
LT		 853 unsigned int cond,
854 snd_pcm_hw_param_t var,
877211f5
TI		 855 struct snd_pcm_hw_constraint_ratdens *r);
856int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
1da177e4
LT		 857 unsigned int cond,
858 unsigned int width,
859 unsigned int msbits);
877211f5 860int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
1da177e4
LT		 861 unsigned int cond,
862 snd_pcm_hw_param_t var,
863 unsigned long step);
877211f5 864int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
1da177e4
LT		 865 unsigned int cond,
866 snd_pcm_hw_param_t var);
877211f5 867int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
1da177e4
LT		 868 unsigned int cond,
869 int var,
870 snd_pcm_hw_rule_func_t func, void *private,
871 int dep, ...);
872
873int snd_pcm_format_signed(snd_pcm_format_t format);
874int snd_pcm_format_unsigned(snd_pcm_format_t format);
875int snd_pcm_format_linear(snd_pcm_format_t format);
876int snd_pcm_format_little_endian(snd_pcm_format_t format);
877int snd_pcm_format_big_endian(snd_pcm_format_t format);
1b44c28d
TI		 878#if 0 /* just for DocBook */
879/**
9502dcad
TI		 880 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
881 * @format: the format to check
882 *
883 * Returns 1 if the given PCM format is CPU-endian, 0 if
884 * opposite, or a negative error code if endian not specified.
885 */
8cdfd251 886int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1b44c28d 887#endif /* DocBook */
9502dcad 888#ifdef SNDRV_LITTLE_ENDIAN
9d01a82e 889#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
9502dcad 890#else
9d01a82e 891#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
9502dcad 892#endif
1da177e4
LT		 893int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
894int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
9502dcad 895ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1da177e4
LT		 896const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
897int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
898snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
1da177e4 899
877211f5
TI		 900void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
901void snd_pcm_set_sync(struct snd_pcm_substream *substream);
902int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
903int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
1da177e4 904 unsigned int cmd, void *arg);
877211f5
TI		 905int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
906int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
907int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
908int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
909int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
910void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
877211f5
TI		 911void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
912snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
1da177e4
LT		 913 const void __user *buf,
914 snd_pcm_uframes_t frames);
877211f5 915snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
1da177e4 916 void __user *buf, snd_pcm_uframes_t frames);
877211f5 917snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
1da177e4 918 void __user **bufs, snd_pcm_uframes_t frames);
877211f5 919snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
1da177e4
LT		 920 void __user **bufs, snd_pcm_uframes_t frames);
921
7653d557
CL		 922extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
923
877211f5 924int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
918f3a0e 925unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
1da177e4 926
877211f5 927static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
1da177e4
LT		 928 struct snd_dma_buffer *bufp)
929{
877211f5 930 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 931 if (bufp) {
932 runtime->dma_buffer_p = bufp;
933 runtime->dma_area = bufp->area;
934 runtime->dma_addr = bufp->addr;
935 runtime->dma_bytes = bufp->bytes;
936 } else {
937 runtime->dma_buffer_p = NULL;
938 runtime->dma_area = NULL;
939 runtime->dma_addr = 0;
940 runtime->dma_bytes = 0;
941 }
942}
943
944/*
945 * Timer interface
946 */
947
877211f5
TI		 948void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
949void snd_pcm_timer_init(struct snd_pcm_substream *substream);
950void snd_pcm_timer_done(struct snd_pcm_substream *substream);
1da177e4 951
b751eef1
JK		 952static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
953 struct timespec *tv)
954{
955 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
956 do_posix_clock_monotonic_gettime(tv);
957 else
958 getnstimeofday(tv);
959}
960
1da177e4
LT		 961/*
962 * Memory
963 */
964
877211f5
TI		 965int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
966int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
967int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
1da177e4
LT		 968 int type, struct device *data,
969 size_t size, size_t max);
877211f5 970int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
1da177e4
LT		 971 int type, void *data,
972 size_t size, size_t max);
877211f5
TI		 973int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
974int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
1da177e4 975
77a23f26
TI		 976/*
977 * SG-buffer handling
978 */
979#define snd_pcm_substream_sgbuf(substream) \
980 ((substream)->runtime->dma_buffer_p->private_data)
981
982static inline dma_addr_t
983snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
984{
985 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
986 return snd_sgbuf_get_addr(sg, ofs);
987}
988
989static inline void *
990snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
991{
992 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
993 return snd_sgbuf_get_ptr(sg, ofs);
994}
995
996struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
997 unsigned long offset);
51e9f2e6
TI		 998unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
999 unsigned int ofs, unsigned int size);
1da177e4
LT		 1000
1001/* handle mmap counter - PCM mmap callback should handle this counter properly */
1002static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1003{
877211f5 1004 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 1005 atomic_inc(&substream->mmap_count);
1da177e4
LT		 1006}
1007
1008static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1009{
877211f5 1010 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 1011 atomic_dec(&substream->mmap_count);
1da177e4
LT		 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
877211f5 1017int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1da177e4
LT		 1018#else
1019#define SNDRV_PCM_INFO_MMAP_IOMEM 0
1020#define snd_pcm_lib_mmap_iomem NULL
1021#endif
1022
1023static 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
7eaa943c
TI		 1037#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1038
1da177e4 1039#endif /* __SOUND_PCM_H */
Linux kernel - Deliverables
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