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[ALSA] info_oss: move prototype of snd_card_info_read_oss to info.h
[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>
28#include <linux/poll.h>
f23f6e08 29#include <linux/mm.h>
1da177e4
LT		 30#include <linux/bitops.h>
31
1da177e4
LT		 32#define snd_pcm_substream_chip(substream) ((substream)->private_data)
33#define snd_pcm_chip(pcm) ((pcm)->private_data)
34
1da177e4
LT		 35#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
36#include "pcm_oss.h"
37#endif
38
39/*
40 * Hardware (lowlevel) section
41 */
42
877211f5 43struct snd_pcm_hardware {
1da177e4
LT		 44 unsigned int info; /* SNDRV_PCM_INFO_* */
45 u64 formats; /* SNDRV_PCM_FMTBIT_* */
46 unsigned int rates; /* SNDRV_PCM_RATE_* */
47 unsigned int rate_min; /* min rate */
48 unsigned int rate_max; /* max rate */
49 unsigned int channels_min; /* min channels */
50 unsigned int channels_max; /* max channels */
51 size_t buffer_bytes_max; /* max buffer size */
52 size_t period_bytes_min; /* min period size */
53 size_t period_bytes_max; /* max period size */
54 unsigned int periods_min; /* min # of periods */
55 unsigned int periods_max; /* max # of periods */
56 size_t fifo_size; /* fifo size in bytes */
877211f5 57};
1da177e4 58
e0e6ce03
RD		 59struct snd_pcm_substream;
60
877211f5
TI		 61struct snd_pcm_ops {
62 int (*open)(struct snd_pcm_substream *substream);
63 int (*close)(struct snd_pcm_substream *substream);
64 int (*ioctl)(struct snd_pcm_substream * substream,
1da177e4 65 unsigned int cmd, void *arg);
877211f5
TI		 66 int (*hw_params)(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params *params);
68 int (*hw_free)(struct snd_pcm_substream *substream);
69 int (*prepare)(struct snd_pcm_substream *substream);
70 int (*trigger)(struct snd_pcm_substream *substream, int cmd);
71 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
72 int (*copy)(struct snd_pcm_substream *substream, int channel,
73 snd_pcm_uframes_t pos,
1da177e4 74 void __user *buf, snd_pcm_uframes_t count);
877211f5 75 int (*silence)(struct snd_pcm_substream *substream, int channel,
1da177e4 76 snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
877211f5
TI		 77 struct page *(*page)(struct snd_pcm_substream *substream,
78 unsigned long offset);
79 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
80 int (*ack)(struct snd_pcm_substream *substream);
81};
1da177e4
LT		 82
83/*
84 *
85 */
86
87#define SNDRV_PCM_DEVICES 8
88
89#define SNDRV_PCM_IOCTL1_FALSE ((void *)0)
90#define SNDRV_PCM_IOCTL1_TRUE ((void *)1)
91
92#define SNDRV_PCM_IOCTL1_RESET 0
93#define SNDRV_PCM_IOCTL1_INFO 1
94#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
95#define SNDRV_PCM_IOCTL1_GSTATE 3
96
97#define SNDRV_PCM_TRIGGER_STOP 0
98#define SNDRV_PCM_TRIGGER_START 1
99#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
100#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
101#define SNDRV_PCM_TRIGGER_SUSPEND 5
102#define SNDRV_PCM_TRIGGER_RESUME 6
103
104#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
105
106/* If you change this don't forget to change rates[] table in pcm_native.c */
107#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
108#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
109#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
110#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
111#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
112#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
113#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
114#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
115#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
116#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
117#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
118#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
119#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
120
121#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
122#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
123
124#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
125 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
126 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
127#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
128#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
129 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
130#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
131 SNDRV_PCM_RATE_192000)
132#define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8)
133#define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8)
134#define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE)
135#define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE)
136#define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE)
137#define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE)
138#define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE)
139#define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE)
140#define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE)
141#define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE)
142#define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE)
143#define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE)
144#define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE)
145#define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE)
146#define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
147#define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
148#define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
149#define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
150#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
151#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
152#define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
153#define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW)
154#define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
155#define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG)
156#define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM)
157#define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
158#define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
159#define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
160#define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
161#define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
162#define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
163#define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
164#define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
165#define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
166#define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
167#define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
168#define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
169#define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
170
171#ifdef SNDRV_LITTLE_ENDIAN
172#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
173#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
174#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
175#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
176#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
177#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
178#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
179#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
180#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
181#endif
182#ifdef SNDRV_BIG_ENDIAN
183#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
184#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
185#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
186#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
187#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
188#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
189#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
190#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
191#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
192#endif
193
877211f5
TI		 194struct snd_pcm_file {
195 struct snd_pcm_substream *substream;
548a648b 196 int no_compat_mmap;
1da177e4
LT		 197};
198
877211f5
TI		 199struct snd_pcm_hw_rule;
200typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
201 struct snd_pcm_hw_rule *rule);
1da177e4 202
877211f5 203struct snd_pcm_hw_rule {
1da177e4
LT		 204 unsigned int cond;
205 snd_pcm_hw_rule_func_t func;
206 int var;
207 int deps[4];
208 void *private;
209};
210
877211f5
TI		 211struct snd_pcm_hw_constraints {
212 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
1da177e4 213 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
877211f5 214 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
1da177e4
LT		 215 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
216 unsigned int rules_num;
217 unsigned int rules_all;
877211f5
TI		 218 struct snd_pcm_hw_rule *rules;
219};
1da177e4 220
877211f5
TI		 221static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
222 snd_pcm_hw_param_t var)
1da177e4
LT		 223{
224 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
225}
226
877211f5
TI		 227static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
228 snd_pcm_hw_param_t var)
1da177e4
LT		 229{
230 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
231}
232
877211f5 233struct snd_ratnum {
1da177e4
LT		 234 unsigned int num;
235 unsigned int den_min, den_max, den_step;
877211f5 236};
1da177e4 237
877211f5 238struct snd_ratden {
1da177e4
LT		 239 unsigned int num_min, num_max, num_step;
240 unsigned int den;
877211f5 241};
1da177e4 242
877211f5 243struct snd_pcm_hw_constraint_ratnums {
1da177e4 244 int nrats;
877211f5
TI		 245 struct snd_ratnum *rats;
246};
1da177e4 247
877211f5 248struct snd_pcm_hw_constraint_ratdens {
1da177e4 249 int nrats;
877211f5
TI		 250 struct snd_ratden *rats;
251};
1da177e4 252
877211f5 253struct snd_pcm_hw_constraint_list {
1da177e4
LT		 254 unsigned int count;
255 unsigned int *list;
256 unsigned int mask;
877211f5 257};
1da177e4 258
877211f5 259struct snd_pcm_runtime {
1da177e4 260 /* -- Status -- */
877211f5 261 struct snd_pcm_substream *trigger_master;
07799e75 262 struct timespec trigger_tstamp; /* trigger timestamp */
1da177e4
LT		 263 int overrange;
264 snd_pcm_uframes_t avail_max;
265 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
266 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/
267
268 /* -- HW params -- */
269 snd_pcm_access_t access; /* access mode */
270 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
271 snd_pcm_subformat_t subformat; /* subformat */
272 unsigned int rate; /* rate in Hz */
273 unsigned int channels; /* channels */
274 snd_pcm_uframes_t period_size; /* period size */
275 unsigned int periods; /* periods */
276 snd_pcm_uframes_t buffer_size; /* buffer size */
277 unsigned int tick_time; /* tick time */
278 snd_pcm_uframes_t min_align; /* Min alignment for the format */
279 size_t byte_align;
280 unsigned int frame_bits;
281 unsigned int sample_bits;
282 unsigned int info;
283 unsigned int rate_num;
284 unsigned int rate_den;
285
286 /* -- SW params -- */
877211f5 287 int tstamp_mode; /* mmap timestamp is updated */
1da177e4
LT		 288 unsigned int period_step;
289 unsigned int sleep_min; /* min ticks to sleep */
290 snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */
291 snd_pcm_uframes_t start_threshold;
292 snd_pcm_uframes_t stop_threshold;
293 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
294 noise is nearest than this */
295 snd_pcm_uframes_t silence_size; /* Silence filling size */
296 snd_pcm_uframes_t boundary; /* pointers wrap point */
297
298 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
299 snd_pcm_uframes_t silence_filled; /* size filled with silence */
300
877211f5 301 union snd_pcm_sync_id sync; /* hardware synchronization ID */
1da177e4
LT		 302
303 /* -- mmap -- */
503fc85a
TI		 304 struct snd_pcm_mmap_status *status;
305 struct snd_pcm_mmap_control *control;
1da177e4
LT		 306
307 /* -- locking / scheduling -- */
308 wait_queue_head_t sleep;
309 struct timer_list tick_timer;
310 struct fasync_struct *fasync;
311
312 /* -- private section -- */
313 void *private_data;
877211f5 314 void (*private_free)(struct snd_pcm_runtime *runtime);
1da177e4
LT		 315
316 /* -- hardware description -- */
877211f5
TI		 317 struct snd_pcm_hardware hw;
318 struct snd_pcm_hw_constraints hw_constraints;
1da177e4
LT		 319
320 /* -- interrupt callbacks -- */
877211f5
TI		 321 void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
322 void (*transfer_ack_end)(struct snd_pcm_substream *substream);
1da177e4
LT		 323
324 /* -- timer -- */
325 unsigned int timer_resolution; /* timer resolution */
b751eef1 326 int tstamp_type; /* timestamp type */
1da177e4
LT		 327
328 /* -- DMA -- */
329 unsigned char *dma_area; /* DMA area */
330 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
331 size_t dma_bytes; /* size of DMA area */
332
333 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
334
335#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
336 /* -- OSS things -- */
877211f5 337 struct snd_pcm_oss_runtime oss;
1da177e4
LT		 338#endif
339};
340
877211f5 341struct snd_pcm_group { /* keep linked substreams */
1da177e4
LT		 342 spinlock_t lock;
343 struct list_head substreams;
344 int count;
877211f5 345};
1da177e4 346
877211f5
TI		 347struct snd_pcm_substream {
348 struct snd_pcm *pcm;
349 struct snd_pcm_str *pstr;
1da177e4
LT		 350 void *private_data; /* copied from pcm->private_data */
351 int number;
352 char name[32]; /* substream name */
353 int stream; /* stream (direction) */
9442e691 354 char latency_id[20]; /* latency identifier */
1da177e4
LT		 355 size_t buffer_bytes_max; /* limit ring buffer size */
356 struct snd_dma_buffer dma_buffer;
357 unsigned int dma_buf_id;
358 size_t dma_max;
359 /* -- hardware operations -- */
877211f5 360 struct snd_pcm_ops *ops;
1da177e4 361 /* -- runtime information -- */
877211f5 362 struct snd_pcm_runtime *runtime;
1da177e4 363 /* -- timer section -- */
877211f5 364 struct snd_timer *timer; /* timer */
1da177e4
LT		 365 unsigned timer_running: 1; /* time is running */
366 spinlock_t timer_lock;
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;
1da177e4
LT		 423 unsigned int device; /* device number */
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
877211f5 453int snd_pcm_new(struct snd_card *card, 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
814#define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min
815
816
877211f5
TI		 817int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
818void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
819void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
820void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
821 unsigned int k, struct snd_interval *c);
822void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
823 const struct snd_interval *b, struct snd_interval *c);
824int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask);
825int snd_interval_ratnum(struct snd_interval *i,
826 unsigned int rats_count, struct snd_ratnum *rats,
1da177e4
LT		 827 unsigned int *nump, unsigned int *denp);
828
877211f5
TI		 829void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
830void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
877211f5 831int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 832
877211f5 833int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 834
877211f5
TI		 835int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
836int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
1da177e4 837
877211f5 838int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 839 u_int32_t mask);
877211f5 840int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 841 u_int64_t mask);
877211f5 842int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 843 unsigned int min, unsigned int max);
877211f5
TI		 844int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
845int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
1da177e4
LT		 846 unsigned int cond,
847 snd_pcm_hw_param_t var,
877211f5
TI		 848 struct snd_pcm_hw_constraint_list *l);
849int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
1da177e4
LT		 850 unsigned int cond,
851 snd_pcm_hw_param_t var,
877211f5
TI		 852 struct snd_pcm_hw_constraint_ratnums *r);
853int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
1da177e4
LT		 854 unsigned int cond,
855 snd_pcm_hw_param_t var,
877211f5
TI		 856 struct snd_pcm_hw_constraint_ratdens *r);
857int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
1da177e4
LT		 858 unsigned int cond,
859 unsigned int width,
860 unsigned int msbits);
877211f5 861int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
1da177e4
LT		 862 unsigned int cond,
863 snd_pcm_hw_param_t var,
864 unsigned long step);
877211f5 865int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
1da177e4
LT		 866 unsigned int cond,
867 snd_pcm_hw_param_t var);
877211f5 868int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
1da177e4
LT		 869 unsigned int cond,
870 int var,
871 snd_pcm_hw_rule_func_t func, void *private,
872 int dep, ...);
873
874int snd_pcm_format_signed(snd_pcm_format_t format);
875int snd_pcm_format_unsigned(snd_pcm_format_t format);
876int snd_pcm_format_linear(snd_pcm_format_t format);
877int snd_pcm_format_little_endian(snd_pcm_format_t format);
878int snd_pcm_format_big_endian(snd_pcm_format_t format);
1b44c28d
TI		 879#if 0 /* just for DocBook */
880/**
9502dcad
TI		 881 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
882 * @format: the format to check
883 *
884 * Returns 1 if the given PCM format is CPU-endian, 0 if
885 * opposite, or a negative error code if endian not specified.
886 */
8cdfd251 887int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1b44c28d 888#endif /* DocBook */
9502dcad 889#ifdef SNDRV_LITTLE_ENDIAN
9d01a82e 890#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
9502dcad 891#else
9d01a82e 892#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
9502dcad 893#endif
1da177e4
LT		 894int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
895int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
9502dcad 896ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1da177e4
LT		 897const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
898int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
899snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
1da177e4 900
877211f5
TI		 901void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
902void snd_pcm_set_sync(struct snd_pcm_substream *substream);
903int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
904int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
1da177e4 905 unsigned int cmd, void *arg);
877211f5
TI		 906int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
907int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
908int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
909int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
910int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
911void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
912void snd_pcm_tick_prepare(struct snd_pcm_substream *substream);
913void snd_pcm_tick_set(struct snd_pcm_substream *substream, unsigned long ticks);
914void snd_pcm_tick_elapsed(struct snd_pcm_substream *substream);
915void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
916snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
1da177e4
LT		 917 const void __user *buf,
918 snd_pcm_uframes_t frames);
877211f5 919snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
1da177e4 920 void __user *buf, snd_pcm_uframes_t frames);
877211f5 921snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
1da177e4 922 void __user **bufs, snd_pcm_uframes_t frames);
877211f5 923snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
1da177e4
LT		 924 void __user **bufs, snd_pcm_uframes_t frames);
925
7653d557
CL		 926extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
927
877211f5 928int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
918f3a0e 929unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
1da177e4 930
877211f5 931static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
1da177e4
LT		 932 struct snd_dma_buffer *bufp)
933{
877211f5 934 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 935 if (bufp) {
936 runtime->dma_buffer_p = bufp;
937 runtime->dma_area = bufp->area;
938 runtime->dma_addr = bufp->addr;
939 runtime->dma_bytes = bufp->bytes;
940 } else {
941 runtime->dma_buffer_p = NULL;
942 runtime->dma_area = NULL;
943 runtime->dma_addr = 0;
944 runtime->dma_bytes = 0;
945 }
946}
947
948/*
949 * Timer interface
950 */
951
877211f5
TI		 952void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
953void snd_pcm_timer_init(struct snd_pcm_substream *substream);
954void snd_pcm_timer_done(struct snd_pcm_substream *substream);
1da177e4 955
b751eef1
JK		 956static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
957 struct timespec *tv)
958{
959 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
960 do_posix_clock_monotonic_gettime(tv);
961 else
962 getnstimeofday(tv);
963}
964
1da177e4
LT		 965/*
966 * Memory
967 */
968
877211f5
TI		 969int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
970int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
971int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
1da177e4
LT		 972 int type, struct device *data,
973 size_t size, size_t max);
877211f5 974int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
1da177e4
LT		 975 int type, void *data,
976 size_t size, size_t max);
877211f5
TI		 977int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
978int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
1da177e4
LT		 979
980#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data)
981#define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size)
982#define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
877211f5 983struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset);
1da177e4
LT		 984
985/* handle mmap counter - PCM mmap callback should handle this counter properly */
986static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
987{
877211f5 988 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 989 atomic_inc(&substream->mmap_count);
1da177e4
LT		 990}
991
992static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
993{
877211f5 994 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 995 atomic_dec(&substream->mmap_count);
1da177e4
LT		 996}
997
998/* mmap for io-memory area */
999#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1000#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
877211f5 1001int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1da177e4
LT		 1002#else
1003#define SNDRV_PCM_INFO_MMAP_IOMEM 0
1004#define snd_pcm_lib_mmap_iomem NULL
1005#endif
1006
1007static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1008{
1009 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1010}
1011
1012/*
1013 * Misc
1014 */
1015
1016#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1017 (IEC958_AES1_CON_ORIGINAL<<8)|\
1018 (IEC958_AES1_CON_PCM_CODER<<8)|\
1019 (IEC958_AES3_CON_FS_48000<<24))
1020
1021#endif /* __SOUND_PCM_H */
Linux kernel - Deliverables
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