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[net-next-2.6.git] / include / sound / pcm.h
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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 31#include <linux/bitops.h>
ed77134b 32#include <linux/pm_qos_params.h>
1da177e4 33
1da177e4
LT		 34#define snd_pcm_substream_chip(substream) ((substream)->private_data)
35#define snd_pcm_chip(pcm) ((pcm)->private_data)
36
1da177e4
LT		 37#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
38#include "pcm_oss.h"
39#endif
40
41/*
42 * Hardware (lowlevel) section
43 */
44
877211f5 45struct snd_pcm_hardware {
1da177e4
LT		 46 unsigned int info; /* SNDRV_PCM_INFO_* */
47 u64 formats; /* SNDRV_PCM_FMTBIT_* */
48 unsigned int rates; /* SNDRV_PCM_RATE_* */
49 unsigned int rate_min; /* min rate */
50 unsigned int rate_max; /* max rate */
51 unsigned int channels_min; /* min channels */
52 unsigned int channels_max; /* max channels */
53 size_t buffer_bytes_max; /* max buffer size */
54 size_t period_bytes_min; /* min period size */
55 size_t period_bytes_max; /* max period size */
56 unsigned int periods_min; /* min # of periods */
57 unsigned int periods_max; /* max # of periods */
58 size_t fifo_size; /* fifo size in bytes */
877211f5 59};
1da177e4 60
e0e6ce03
RD		 61struct snd_pcm_substream;
62
877211f5
TI		 63struct snd_pcm_ops {
64 int (*open)(struct snd_pcm_substream *substream);
65 int (*close)(struct snd_pcm_substream *substream);
66 int (*ioctl)(struct snd_pcm_substream * substream,
1da177e4 67 unsigned int cmd, void *arg);
877211f5
TI		 68 int (*hw_params)(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params *params);
70 int (*hw_free)(struct snd_pcm_substream *substream);
71 int (*prepare)(struct snd_pcm_substream *substream);
72 int (*trigger)(struct snd_pcm_substream *substream, int cmd);
73 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
74 int (*copy)(struct snd_pcm_substream *substream, int channel,
75 snd_pcm_uframes_t pos,
1da177e4 76 void __user *buf, snd_pcm_uframes_t count);
877211f5 77 int (*silence)(struct snd_pcm_substream *substream, int channel,
1da177e4 78 snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
877211f5
TI		 79 struct page *(*page)(struct snd_pcm_substream *substream,
80 unsigned long offset);
81 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
82 int (*ack)(struct snd_pcm_substream *substream);
83};
1da177e4
LT		 84
85/*
86 *
87 */
88
f90c06a2
PM		 89#if defined(CONFIG_SND_DYNAMIC_MINORS)
90#define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2)
91#else
92#define SNDRV_PCM_DEVICES 8
93#endif
896e6cc2 94
1da177e4
LT		 95#define SNDRV_PCM_IOCTL1_FALSE ((void *)0)
96#define SNDRV_PCM_IOCTL1_TRUE ((void *)1)
97
98#define SNDRV_PCM_IOCTL1_RESET 0
99#define SNDRV_PCM_IOCTL1_INFO 1
100#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
101#define SNDRV_PCM_IOCTL1_GSTATE 3
8bea869c 102#define SNDRV_PCM_IOCTL1_FIFO_SIZE 4
1da177e4
LT		 103
104#define SNDRV_PCM_TRIGGER_STOP 0
105#define SNDRV_PCM_TRIGGER_START 1
106#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
107#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
108#define SNDRV_PCM_TRIGGER_SUSPEND 5
109#define SNDRV_PCM_TRIGGER_RESUME 6
110
111#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
112
113/* If you change this don't forget to change rates[] table in pcm_native.c */
114#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
115#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
116#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
117#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
118#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
119#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
120#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
121#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
122#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
123#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
124#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
125#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
126#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
127
128#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
129#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
130
131#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
132 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
133 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
134#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
135#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
136 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
137#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
138 SNDRV_PCM_RATE_192000)
139#define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8)
140#define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8)
141#define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE)
142#define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE)
143#define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE)
144#define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE)
145#define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE)
146#define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE)
147#define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE)
148#define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE)
149#define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE)
150#define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE)
151#define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE)
152#define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE)
153#define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
154#define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
155#define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
156#define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
157#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
158#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
159#define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
160#define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW)
161#define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
162#define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG)
163#define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM)
164#define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
165#define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
166#define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
167#define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
168#define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
169#define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
170#define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
171#define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
172#define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
173#define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
174#define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
175#define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
176#define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
15c0cee6
BC		 177#define SNDRV_PCM_FMTBIT_G723_24 (1ULL << SNDRV_PCM_FORMAT_G723_24)
178#define SNDRV_PCM_FMTBIT_G723_24_1B (1ULL << SNDRV_PCM_FORMAT_G723_24_1B)
179#define SNDRV_PCM_FMTBIT_G723_40 (1ULL << SNDRV_PCM_FORMAT_G723_40)
180#define SNDRV_PCM_FMTBIT_G723_40_1B (1ULL << SNDRV_PCM_FORMAT_G723_40_1B)
1da177e4
LT		 181
182#ifdef SNDRV_LITTLE_ENDIAN
183#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
184#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
185#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
186#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
187#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
188#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
189#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
190#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
191#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
192#endif
193#ifdef SNDRV_BIG_ENDIAN
194#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
195#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
196#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
197#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
198#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
199#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
200#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
201#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
202#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
203#endif
204
877211f5
TI		 205struct snd_pcm_file {
206 struct snd_pcm_substream *substream;
548a648b 207 int no_compat_mmap;
1da177e4
LT		 208};
209
877211f5
TI		 210struct snd_pcm_hw_rule;
211typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
212 struct snd_pcm_hw_rule *rule);
1da177e4 213
877211f5 214struct snd_pcm_hw_rule {
1da177e4
LT		 215 unsigned int cond;
216 snd_pcm_hw_rule_func_t func;
217 int var;
218 int deps[4];
219 void *private;
220};
221
877211f5
TI		 222struct snd_pcm_hw_constraints {
223 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
1da177e4 224 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
877211f5 225 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
1da177e4
LT		 226 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
227 unsigned int rules_num;
228 unsigned int rules_all;
877211f5
TI		 229 struct snd_pcm_hw_rule *rules;
230};
1da177e4 231
877211f5
TI		 232static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
233 snd_pcm_hw_param_t var)
1da177e4
LT		 234{
235 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
236}
237
877211f5
TI		 238static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
239 snd_pcm_hw_param_t var)
1da177e4
LT		 240{
241 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
242}
243
877211f5 244struct snd_ratnum {
1da177e4
LT		 245 unsigned int num;
246 unsigned int den_min, den_max, den_step;
877211f5 247};
1da177e4 248
877211f5 249struct snd_ratden {
1da177e4
LT		 250 unsigned int num_min, num_max, num_step;
251 unsigned int den;
877211f5 252};
1da177e4 253
877211f5 254struct snd_pcm_hw_constraint_ratnums {
1da177e4 255 int nrats;
877211f5
TI		 256 struct snd_ratnum *rats;
257};
1da177e4 258
877211f5 259struct snd_pcm_hw_constraint_ratdens {
1da177e4 260 int nrats;
877211f5
TI		 261 struct snd_ratden *rats;
262};
1da177e4 263
877211f5 264struct snd_pcm_hw_constraint_list {
1da177e4
LT		 265 unsigned int count;
266 unsigned int *list;
267 unsigned int mask;
877211f5 268};
1da177e4 269
4d96eb25
JK		 270struct snd_pcm_hwptr_log;
271
877211f5 272struct snd_pcm_runtime {
1da177e4 273 /* -- Status -- */
877211f5 274 struct snd_pcm_substream *trigger_master;
07799e75 275 struct timespec trigger_tstamp; /* trigger timestamp */
1da177e4
LT		 276 int overrange;
277 snd_pcm_uframes_t avail_max;
278 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
e7636925 279 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
bbf6ad13 280 unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
bd76af0f 281 unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */
4bbe1ddf 282 snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */
1da177e4
LT		 283
284 /* -- HW params -- */
285 snd_pcm_access_t access; /* access mode */
286 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
287 snd_pcm_subformat_t subformat; /* subformat */
288 unsigned int rate; /* rate in Hz */
289 unsigned int channels; /* channels */
290 snd_pcm_uframes_t period_size; /* period size */
291 unsigned int periods; /* periods */
292 snd_pcm_uframes_t buffer_size; /* buffer size */
1da177e4
LT		 293 snd_pcm_uframes_t min_align; /* Min alignment for the format */
294 size_t byte_align;
295 unsigned int frame_bits;
296 unsigned int sample_bits;
297 unsigned int info;
298 unsigned int rate_num;
299 unsigned int rate_den;
300
301 /* -- SW params -- */
877211f5 302 int tstamp_mode; /* mmap timestamp is updated */
1da177e4 303 unsigned int period_step;
1da177e4
LT		 304 snd_pcm_uframes_t start_threshold;
305 snd_pcm_uframes_t stop_threshold;
306 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
307 noise is nearest than this */
308 snd_pcm_uframes_t silence_size; /* Silence filling size */
309 snd_pcm_uframes_t boundary; /* pointers wrap point */
310
311 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
312 snd_pcm_uframes_t silence_filled; /* size filled with silence */
313
877211f5 314 union snd_pcm_sync_id sync; /* hardware synchronization ID */
1da177e4
LT		 315
316 /* -- mmap -- */
503fc85a
TI		 317 struct snd_pcm_mmap_status *status;
318 struct snd_pcm_mmap_control *control;
1da177e4
LT		 319
320 /* -- locking / scheduling -- */
5daeba34 321 snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */
c91a988d
JK		 322 wait_queue_head_t sleep; /* poll sleep */
323 wait_queue_head_t tsleep; /* transfer sleep */
1da177e4
LT		 324 struct fasync_struct *fasync;
325
326 /* -- private section -- */
327 void *private_data;
877211f5 328 void (*private_free)(struct snd_pcm_runtime *runtime);
1da177e4
LT		 329
330 /* -- hardware description -- */
877211f5
TI		 331 struct snd_pcm_hardware hw;
332 struct snd_pcm_hw_constraints hw_constraints;
1da177e4
LT		 333
334 /* -- interrupt callbacks -- */
877211f5
TI		 335 void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
336 void (*transfer_ack_end)(struct snd_pcm_substream *substream);
1da177e4
LT		 337
338 /* -- timer -- */
339 unsigned int timer_resolution; /* timer resolution */
b751eef1 340 int tstamp_type; /* timestamp type */
1da177e4
LT		 341
342 /* -- DMA -- */
343 unsigned char *dma_area; /* DMA area */
344 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
345 size_t dma_bytes; /* size of DMA area */
346
347 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
348
349#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
350 /* -- OSS things -- */
877211f5 351 struct snd_pcm_oss_runtime oss;
1da177e4 352#endif
4d96eb25
JK		 353
354#ifdef CONFIG_SND_PCM_XRUN_DEBUG
355 struct snd_pcm_hwptr_log *hwptr_log;
356#endif
1da177e4
LT		 357};
358
877211f5 359struct snd_pcm_group { /* keep linked substreams */
1da177e4
LT		 360 spinlock_t lock;
361 struct list_head substreams;
362 int count;
877211f5 363};
1da177e4 364
e7373b70
CL		 365struct pid;
366
877211f5
TI		 367struct snd_pcm_substream {
368 struct snd_pcm *pcm;
369 struct snd_pcm_str *pstr;
1da177e4
LT		 370 void *private_data; /* copied from pcm->private_data */
371 int number;
372 char name[32]; /* substream name */
373 int stream; /* stream (direction) */
82f68251 374 struct pm_qos_request_list latency_pm_qos_req; /* pm_qos request */
1da177e4
LT		 375 size_t buffer_bytes_max; /* limit ring buffer size */
376 struct snd_dma_buffer dma_buffer;
377 unsigned int dma_buf_id;
378 size_t dma_max;
379 /* -- hardware operations -- */
877211f5 380 struct snd_pcm_ops *ops;
1da177e4 381 /* -- runtime information -- */
877211f5 382 struct snd_pcm_runtime *runtime;
1da177e4 383 /* -- timer section -- */
877211f5 384 struct snd_timer *timer; /* timer */
1da177e4 385 unsigned timer_running: 1; /* time is running */
1da177e4 386 /* -- next substream -- */
877211f5 387 struct snd_pcm_substream *next;
1da177e4
LT		 388 /* -- linked substreams -- */
389 struct list_head link_list; /* linked list member */
877211f5
TI		 390 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
391 struct snd_pcm_group *group; /* pointer to current group */
1da177e4 392 /* -- assigned files -- */
1576274d 393 void *file;
0df63e44 394 int ref_count;
9c323fcb 395 atomic_t mmap_count;
0df63e44 396 unsigned int f_flags;
3bf75f9b 397 void (*pcm_release)(struct snd_pcm_substream *);
e7373b70 398 struct pid *pid;
1da177e4
LT		 399#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
400 /* -- OSS things -- */
877211f5 401 struct snd_pcm_oss_substream oss;
1da177e4 402#endif
b7d90a35 403#ifdef CONFIG_SND_VERBOSE_PROCFS
877211f5
TI		 404 struct snd_info_entry *proc_root;
405 struct snd_info_entry *proc_info_entry;
406 struct snd_info_entry *proc_hw_params_entry;
407 struct snd_info_entry *proc_sw_params_entry;
408 struct snd_info_entry *proc_status_entry;
409 struct snd_info_entry *proc_prealloc_entry;
c7132aeb 410 struct snd_info_entry *proc_prealloc_max_entry;
b7d90a35 411#endif
1da177e4 412 /* misc flags */
3bf75f9b 413 unsigned int hw_opened: 1;
1da177e4
LT		 414};
415
0df63e44 416#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
1da177e4
LT		 417
418
877211f5 419struct snd_pcm_str {
1da177e4 420 int stream; /* stream (direction) */
877211f5 421 struct snd_pcm *pcm;
1da177e4
LT		 422 /* -- substreams -- */
423 unsigned int substream_count;
424 unsigned int substream_opened;
877211f5 425 struct snd_pcm_substream *substream;
1da177e4
LT		 426#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
427 /* -- OSS things -- */
877211f5 428 struct snd_pcm_oss_stream oss;
1da177e4 429#endif
b7d90a35 430#ifdef CONFIG_SND_VERBOSE_PROCFS
877211f5
TI		 431 struct snd_info_entry *proc_root;
432 struct snd_info_entry *proc_info_entry;
b7d90a35 433#ifdef CONFIG_SND_PCM_XRUN_DEBUG
1da177e4 434 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
877211f5 435 struct snd_info_entry *proc_xrun_debug_entry;
1da177e4 436#endif
b7d90a35 437#endif
1da177e4
LT		 438};
439
877211f5
TI		 440struct snd_pcm {
441 struct snd_card *card;
f87135f5 442 struct list_head list;
f90c06a2 443 int device; /* device number */
1da177e4
LT		 444 unsigned int info_flags;
445 unsigned short dev_class;
446 unsigned short dev_subclass;
447 char id[64];
448 char name[80];
877211f5 449 struct snd_pcm_str streams[2];
1a60d4c5 450 struct mutex open_mutex;
1da177e4
LT		 451 wait_queue_head_t open_wait;
452 void *private_data;
877211f5 453 void (*private_free) (struct snd_pcm *pcm);
c78085fc 454 struct device *dev; /* actual hw device this belongs to */
1da177e4 455#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
877211f5 456 struct snd_pcm_oss oss;
1da177e4
LT		 457#endif
458};
459
877211f5
TI		 460struct snd_pcm_notify {
461 int (*n_register) (struct snd_pcm * pcm);
462 int (*n_disconnect) (struct snd_pcm * pcm);
463 int (*n_unregister) (struct snd_pcm * pcm);
1da177e4 464 struct list_head list;
877211f5 465};
1da177e4
LT		 466
467/*
468 * Registering
469 */
470
54047320 471extern const struct file_operations snd_pcm_f_ops[2];
1da177e4 472
e6161653 473int snd_pcm_new(struct snd_card *card, const char *id, int device,
1da177e4 474 int playback_count, int capture_count,
877211f5
TI		 475 struct snd_pcm **rpcm);
476int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
1da177e4 477
877211f5 478int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
1da177e4
LT		 479
480/*
481 * Native I/O
482 */
483
484extern rwlock_t snd_pcm_link_rwlock;
485
877211f5
TI		 486int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
487int snd_pcm_info_user(struct snd_pcm_substream *substream,
488 struct snd_pcm_info __user *info);
489int snd_pcm_status(struct snd_pcm_substream *substream,
490 struct snd_pcm_status *status);
877211f5
TI		 491int snd_pcm_start(struct snd_pcm_substream *substream);
492int snd_pcm_stop(struct snd_pcm_substream *substream, int status);
493int snd_pcm_drain_done(struct snd_pcm_substream *substream);
1da177e4 494#ifdef CONFIG_PM
877211f5
TI		 495int snd_pcm_suspend(struct snd_pcm_substream *substream);
496int snd_pcm_suspend_all(struct snd_pcm *pcm);
1da177e4 497#endif
877211f5 498int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
3bf75f9b
TI		 499int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
500 struct snd_pcm_substream **rsubstream);
877211f5 501void snd_pcm_release_substream(struct snd_pcm_substream *substream);
3bf75f9b
TI		 502int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
503 struct snd_pcm_substream **rsubstream);
504void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
1da177e4 505void snd_pcm_vma_notify_data(void *client, void *data);
877211f5 506int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
1da177e4 507
1da177e4
LT		 508/*
509 * PCM library
510 */
511
877211f5 512static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
1da177e4
LT		 513{
514 return substream->group != &substream->self_group;
515}
516
877211f5 517static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
1da177e4
LT		 518{
519 read_lock(&snd_pcm_link_rwlock);
520 spin_lock(&substream->self_group.lock);
521}
522
877211f5 523static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
1da177e4
LT		 524{
525 spin_unlock(&substream->self_group.lock);
526 read_unlock(&snd_pcm_link_rwlock);
527}
528
877211f5 529static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
1da177e4
LT		 530{
531 read_lock_irq(&snd_pcm_link_rwlock);
532 spin_lock(&substream->self_group.lock);
533}
534
877211f5 535static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
1da177e4
LT		 536{
537 spin_unlock(&substream->self_group.lock);
538 read_unlock_irq(&snd_pcm_link_rwlock);
539}
540
541#define snd_pcm_stream_lock_irqsave(substream, flags) \
542do { \
543 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
544 spin_lock(&substream->self_group.lock); \
545} while (0)
546
547#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
548do { \
549 spin_unlock(&substream->self_group.lock); \
550 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
551} while (0)
552
ef991b95
TI		 553#define snd_pcm_group_for_each_entry(s, substream) \
554 list_for_each_entry(s, &substream->group->substreams, link_list)
1da177e4 555
877211f5 556static inline int snd_pcm_running(struct snd_pcm_substream *substream)
1da177e4
LT		 557{
558 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
559 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
560 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
561}
562
877211f5 563static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 564{
565 return size * 8 / runtime->sample_bits;
566}
567
877211f5 568static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 569{
570 return size * 8 / runtime->frame_bits;
571}
572
877211f5 573static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 574{
575 return size * runtime->sample_bits / 8;
576}
577
877211f5 578static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
1da177e4
LT		 579{
580 return size * runtime->frame_bits / 8;
581}
582
877211f5 583static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
1da177e4
LT		 584{
585 return bytes % runtime->byte_align == 0;
586}
587
877211f5 588static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
1da177e4 589{
877211f5 590 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 591 return frames_to_bytes(runtime, runtime->buffer_size);
592}
593
877211f5 594static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
1da177e4 595{
877211f5 596 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 597 return frames_to_bytes(runtime, runtime->period_size);
598}
599
600/*
601 * result is: 0 ... (boundary - 1)
602 */
877211f5 603static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 604{
605 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
606 if (avail < 0)
607 avail += runtime->boundary;
608 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
609 avail -= runtime->boundary;
610 return avail;
611}
612
613/*
614 * result is: 0 ... (boundary - 1)
615 */
877211f5 616static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 617{
618 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
619 if (avail < 0)
620 avail += runtime->boundary;
621 return avail;
622}
623
877211f5 624static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 625{
626 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
627}
628
877211f5 629static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 630{
631 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
632}
633
634/**
635 * snd_pcm_playback_ready - check whether the playback buffer is available
636 * @substream: the pcm substream instance
637 *
638 * Checks whether enough free space is available on the playback buffer.
639 *
640 * Returns non-zero if available, or zero if not.
641 */
877211f5 642static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
1da177e4 643{
877211f5 644 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 645 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
646}
647
648/**
649 * snd_pcm_capture_ready - check whether the capture buffer is available
650 * @substream: the pcm substream instance
651 *
652 * Checks whether enough capture data is available on the capture buffer.
653 *
654 * Returns non-zero if available, or zero if not.
655 */
877211f5 656static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
1da177e4 657{
877211f5 658 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 659 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
660}
661
662/**
663 * snd_pcm_playback_data - check whether any data exists on the playback buffer
664 * @substream: the pcm substream instance
665 *
666 * Checks whether any data exists on the playback buffer. If stop_threshold
667 * is bigger or equal to boundary, then this function returns always non-zero.
668 *
669 * Returns non-zero if exists, or zero if not.
670 */
877211f5 671static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
1da177e4 672{
877211f5 673 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 674
675 if (runtime->stop_threshold >= runtime->boundary)
676 return 1;
677 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
678}
679
680/**
681 * snd_pcm_playback_empty - check whether the playback buffer is empty
682 * @substream: the pcm substream instance
683 *
684 * Checks whether the playback buffer is empty.
685 *
686 * Returns non-zero if empty, or zero if not.
687 */
877211f5 688static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
1da177e4 689{
877211f5 690 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 691 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
692}
693
694/**
695 * snd_pcm_capture_empty - check whether the capture buffer is empty
696 * @substream: the pcm substream instance
697 *
698 * Checks whether the capture buffer is empty.
699 *
700 * Returns non-zero if empty, or zero if not.
701 */
877211f5 702static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
1da177e4 703{
877211f5 704 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 705 return snd_pcm_capture_avail(runtime) == 0;
706}
707
877211f5
TI		 708static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
709 struct snd_pcm_substream *master)
1da177e4
LT		 710{
711 substream->runtime->trigger_master = master;
712}
713
714static inline int hw_is_mask(int var)
715{
716 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
717 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
718}
719
720static inline int hw_is_interval(int var)
721{
722 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
723 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
724}
725
877211f5 726static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
1da177e4
LT		 727 snd_pcm_hw_param_t var)
728{
729 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
730}
731
877211f5 732static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
1da177e4
LT		 733 snd_pcm_hw_param_t var)
734{
735 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
736}
737
877211f5 738static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 739 snd_pcm_hw_param_t var)
740{
b9f09a48 741 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
1da177e4
LT		 742}
743
877211f5 744static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 745 snd_pcm_hw_param_t var)
746{
b9f09a48 747 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
1da177e4
LT		 748}
749
750#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
751#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
752#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
753#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
754#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
755#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
756#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
757#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
758#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
759#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
1da177e4
LT		 760
761
877211f5
TI		 762int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
763void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
764void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
765void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
766 unsigned int k, struct snd_interval *c);
767void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
768 const struct snd_interval *b, struct snd_interval *c);
769int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask);
770int snd_interval_ratnum(struct snd_interval *i,
771 unsigned int rats_count, struct snd_ratnum *rats,
1da177e4
LT		 772 unsigned int *nump, unsigned int *denp);
773
877211f5
TI		 774void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
775void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
877211f5 776int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 777
877211f5 778int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 779
877211f5
TI		 780int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
781int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
1da177e4 782
877211f5 783int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 784 u_int32_t mask);
877211f5 785int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 786 u_int64_t mask);
877211f5 787int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 788 unsigned int min, unsigned int max);
877211f5
TI		 789int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
790int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
1da177e4
LT		 791 unsigned int cond,
792 snd_pcm_hw_param_t var,
877211f5
TI		 793 struct snd_pcm_hw_constraint_list *l);
794int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
1da177e4
LT		 795 unsigned int cond,
796 snd_pcm_hw_param_t var,
877211f5
TI		 797 struct snd_pcm_hw_constraint_ratnums *r);
798int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
1da177e4
LT		 799 unsigned int cond,
800 snd_pcm_hw_param_t var,
877211f5
TI		 801 struct snd_pcm_hw_constraint_ratdens *r);
802int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
1da177e4
LT		 803 unsigned int cond,
804 unsigned int width,
805 unsigned int msbits);
877211f5 806int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
1da177e4
LT		 807 unsigned int cond,
808 snd_pcm_hw_param_t var,
809 unsigned long step);
877211f5 810int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
1da177e4
LT		 811 unsigned int cond,
812 snd_pcm_hw_param_t var);
877211f5 813int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
1da177e4
LT		 814 unsigned int cond,
815 int var,
816 snd_pcm_hw_rule_func_t func, void *private,
817 int dep, ...);
818
819int snd_pcm_format_signed(snd_pcm_format_t format);
820int snd_pcm_format_unsigned(snd_pcm_format_t format);
821int snd_pcm_format_linear(snd_pcm_format_t format);
822int snd_pcm_format_little_endian(snd_pcm_format_t format);
823int snd_pcm_format_big_endian(snd_pcm_format_t format);
1b44c28d
TI		 824#if 0 /* just for DocBook */
825/**
9502dcad
TI		 826 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
827 * @format: the format to check
828 *
829 * Returns 1 if the given PCM format is CPU-endian, 0 if
830 * opposite, or a negative error code if endian not specified.
831 */
8cdfd251 832int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1b44c28d 833#endif /* DocBook */
9502dcad 834#ifdef SNDRV_LITTLE_ENDIAN
9d01a82e 835#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
9502dcad 836#else
9d01a82e 837#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
9502dcad 838#endif
1da177e4
LT		 839int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
840int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
9502dcad 841ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1da177e4
LT		 842const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
843int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
844snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
1da177e4 845
877211f5
TI		 846void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
847void snd_pcm_set_sync(struct snd_pcm_substream *substream);
848int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
849int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
1da177e4 850 unsigned int cmd, void *arg);
1250932e
JK		 851int snd_pcm_update_state(struct snd_pcm_substream *substream,
852 struct snd_pcm_runtime *runtime);
877211f5
TI		 853int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
854int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
855int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
856int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
857int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
858void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
877211f5
TI		 859void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
860snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
1da177e4
LT		 861 const void __user *buf,
862 snd_pcm_uframes_t frames);
877211f5 863snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
1da177e4 864 void __user *buf, snd_pcm_uframes_t frames);
877211f5 865snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
1da177e4 866 void __user **bufs, snd_pcm_uframes_t frames);
877211f5 867snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
1da177e4
LT		 868 void __user **bufs, snd_pcm_uframes_t frames);
869
7653d557
CL		 870extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
871
877211f5 872int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
918f3a0e 873unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
1da177e4 874
877211f5 875static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
1da177e4
LT		 876 struct snd_dma_buffer *bufp)
877{
877211f5 878 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 879 if (bufp) {
880 runtime->dma_buffer_p = bufp;
881 runtime->dma_area = bufp->area;
882 runtime->dma_addr = bufp->addr;
883 runtime->dma_bytes = bufp->bytes;
884 } else {
885 runtime->dma_buffer_p = NULL;
886 runtime->dma_area = NULL;
887 runtime->dma_addr = 0;
888 runtime->dma_bytes = 0;
889 }
890}
891
892/*
893 * Timer interface
894 */
895
877211f5
TI		 896void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
897void snd_pcm_timer_init(struct snd_pcm_substream *substream);
898void snd_pcm_timer_done(struct snd_pcm_substream *substream);
1da177e4 899
b751eef1
JK		 900static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
901 struct timespec *tv)
902{
903 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
904 do_posix_clock_monotonic_gettime(tv);
905 else
906 getnstimeofday(tv);
907}
908
1da177e4
LT		 909/*
910 * Memory
911 */
912
877211f5
TI		 913int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
914int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
915int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
1da177e4
LT		 916 int type, struct device *data,
917 size_t size, size_t max);
877211f5 918int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
1da177e4
LT		 919 int type, void *data,
920 size_t size, size_t max);
877211f5
TI		 921int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
922int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
1da177e4 923
681b84e1
CL		 924int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
925 size_t size, gfp_t gfp_flags);
926int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
927struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
928 unsigned long offset);
929#if 0 /* for kernel-doc */
930/**
931 * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
932 * @substream: the substream to allocate the buffer to
933 * @size: the requested buffer size, in bytes
934 *
935 * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is
936 * contiguous in kernel virtual space, but not in physical memory. Use this
937 * if the buffer is accessed by kernel code but not by device DMA.
938 *
939 * Returns 1 if the buffer was changed, 0 if not changed, or a negative error
940 * code.
941 */
942static int snd_pcm_lib_alloc_vmalloc_buffer
943 (struct snd_pcm_substream *substream, size_t size);
944/**
945 * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer
946 * @substream: the substream to allocate the buffer to
947 * @size: the requested buffer size, in bytes
948 *
949 * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses
950 * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory.
951 */
952static int snd_pcm_lib_alloc_vmalloc_32_buffer
953 (struct snd_pcm_substream *substream, size_t size);
954#endif
955#define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \
956 _snd_pcm_lib_alloc_vmalloc_buffer \
957 (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO)
958#define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \
959 _snd_pcm_lib_alloc_vmalloc_buffer \
960 (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO)
961
cc6a8acd 962#ifdef CONFIG_SND_DMA_SGBUF
77a23f26
TI		 963/*
964 * SG-buffer handling
965 */
966#define snd_pcm_substream_sgbuf(substream) \
967 ((substream)->runtime->dma_buffer_p->private_data)
968
969static inline dma_addr_t
970snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
971{
972 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
973 return snd_sgbuf_get_addr(sg, ofs);
974}
975
976static inline void *
977snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
978{
979 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
980 return snd_sgbuf_get_ptr(sg, ofs);
981}
982
983struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
984 unsigned long offset);
51e9f2e6
TI		 985unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
986 unsigned int ofs, unsigned int size);
1da177e4 987
cc6a8acd
TI		 988#else /* !SND_DMA_SGBUF */
989/*
990 * fake using a continuous buffer
991 */
992static inline dma_addr_t
993snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
994{
995 return substream->runtime->dma_addr + ofs;
996}
997
998static inline void *
999snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
1000{
1001 return substream->runtime->dma_area + ofs;
1002}
1003
1004#define snd_pcm_sgbuf_ops_page NULL
1005
1006#define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size)
1007
1008#endif /* SND_DMA_SGBUF */
1009
1da177e4
LT		 1010/* handle mmap counter - PCM mmap callback should handle this counter properly */
1011static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1012{
877211f5 1013 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 1014 atomic_inc(&substream->mmap_count);
1da177e4
LT		 1015}
1016
1017static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1018{
877211f5 1019 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 1020 atomic_dec(&substream->mmap_count);
1da177e4
LT		 1021}
1022
1023/* mmap for io-memory area */
1024#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1025#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
877211f5 1026int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1da177e4
LT		 1027#else
1028#define SNDRV_PCM_INFO_MMAP_IOMEM 0
1029#define snd_pcm_lib_mmap_iomem NULL
1030#endif
1031
c32d977b
TI		 1032int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
1033 struct vm_area_struct *area);
1034#define snd_pcm_lib_mmap_vmalloc snd_pcm_lib_mmap_noncached
1035
1da177e4
LT		 1036static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1037{
1038 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1039}
1040
1041/*
1042 * Misc
1043 */
1044
1045#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1046 (IEC958_AES1_CON_ORIGINAL<<8)|\
1047 (IEC958_AES1_CON_PCM_CODER<<8)|\
1048 (IEC958_AES3_CON_FS_48000<<24))
1049
7eaa943c
TI		 1050#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1051
6e5265ec
TI		 1052const char *snd_pcm_format_name(snd_pcm_format_t format);
1053
1da177e4 1054#endif /* __SOUND_PCM_H */
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