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ASoC: codecs: Refresh copyrights for Wolfson drivers
[GitHub/mt8127/android_kernel_alcatel_ttab.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 31#include <linux/bitops.h>
e8db0be1 32#include <linux/pm_qos.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)
fea952e5
CL		 139#define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt)
140#define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8)
141#define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8)
142#define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE)
143#define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE)
144#define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE)
145#define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE)
146#define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE)
147#define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE)
148#define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE)
149#define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE)
150#define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE)
151#define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE)
152#define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE)
153#define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE)
154#define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE)
155#define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE)
156#define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE)
157#define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE)
158#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE)
159#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE)
160#define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW)
161#define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW)
162#define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM)
163#define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG)
164#define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM)
165#define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL)
166#define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE)
167#define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE)
168#define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE)
169#define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE)
170#define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE)
171#define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE)
172#define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE)
173#define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE)
174#define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE)
175#define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE)
176#define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE)
177#define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE)
178#define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24)
179#define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B)
180#define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40)
181#define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B)
1da177e4
LT		 182
183#ifdef SNDRV_LITTLE_ENDIAN
184#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
185#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
186#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
187#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
188#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
189#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
190#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
191#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
192#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
193#endif
194#ifdef SNDRV_BIG_ENDIAN
195#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
196#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
197#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
198#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
199#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
200#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
201#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
202#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
203#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
204#endif
205
877211f5
TI		 206struct snd_pcm_file {
207 struct snd_pcm_substream *substream;
548a648b 208 int no_compat_mmap;
1da177e4
LT		 209};
210
877211f5
TI		 211struct snd_pcm_hw_rule;
212typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
213 struct snd_pcm_hw_rule *rule);
1da177e4 214
877211f5 215struct snd_pcm_hw_rule {
1da177e4
LT		 216 unsigned int cond;
217 snd_pcm_hw_rule_func_t func;
218 int var;
219 int deps[4];
220 void *private;
221};
222
877211f5
TI		 223struct snd_pcm_hw_constraints {
224 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
1da177e4 225 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
877211f5 226 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
1da177e4
LT		 227 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
228 unsigned int rules_num;
229 unsigned int rules_all;
877211f5
TI		 230 struct snd_pcm_hw_rule *rules;
231};
1da177e4 232
877211f5
TI		 233static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
234 snd_pcm_hw_param_t var)
1da177e4
LT		 235{
236 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
237}
238
877211f5
TI		 239static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
240 snd_pcm_hw_param_t var)
1da177e4
LT		 241{
242 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
243}
244
877211f5 245struct snd_ratnum {
1da177e4
LT		 246 unsigned int num;
247 unsigned int den_min, den_max, den_step;
877211f5 248};
1da177e4 249
877211f5 250struct snd_ratden {
1da177e4
LT		 251 unsigned int num_min, num_max, num_step;
252 unsigned int den;
877211f5 253};
1da177e4 254
877211f5 255struct snd_pcm_hw_constraint_ratnums {
1da177e4 256 int nrats;
877211f5
TI		 257 struct snd_ratnum *rats;
258};
1da177e4 259
877211f5 260struct snd_pcm_hw_constraint_ratdens {
1da177e4 261 int nrats;
877211f5
TI		 262 struct snd_ratden *rats;
263};
1da177e4 264
877211f5 265struct snd_pcm_hw_constraint_list {
1da177e4 266 unsigned int count;
4af87a93 267 const unsigned int *list;
1da177e4 268 unsigned int mask;
877211f5 269};
1da177e4 270
4d96eb25
JK		 271struct snd_pcm_hwptr_log;
272
877211f5 273struct snd_pcm_runtime {
1da177e4 274 /* -- Status -- */
877211f5 275 struct snd_pcm_substream *trigger_master;
07799e75 276 struct timespec trigger_tstamp; /* trigger timestamp */
1da177e4
LT		 277 int overrange;
278 snd_pcm_uframes_t avail_max;
279 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
e7636925 280 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
bbf6ad13 281 unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
bd76af0f 282 unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */
4bbe1ddf 283 snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */
1da177e4
LT		 284
285 /* -- HW params -- */
286 snd_pcm_access_t access; /* access mode */
287 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
288 snd_pcm_subformat_t subformat; /* subformat */
289 unsigned int rate; /* rate in Hz */
290 unsigned int channels; /* channels */
291 snd_pcm_uframes_t period_size; /* period size */
292 unsigned int periods; /* periods */
293 snd_pcm_uframes_t buffer_size; /* buffer size */
1da177e4
LT		 294 snd_pcm_uframes_t min_align; /* Min alignment for the format */
295 size_t byte_align;
296 unsigned int frame_bits;
297 unsigned int sample_bits;
298 unsigned int info;
299 unsigned int rate_num;
300 unsigned int rate_den;
ab69a490 301 unsigned int no_period_wakeup: 1;
1da177e4
LT		 302
303 /* -- SW params -- */
877211f5 304 int tstamp_mode; /* mmap timestamp is updated */
1da177e4 305 unsigned int period_step;
1da177e4
LT		 306 snd_pcm_uframes_t start_threshold;
307 snd_pcm_uframes_t stop_threshold;
308 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
309 noise is nearest than this */
310 snd_pcm_uframes_t silence_size; /* Silence filling size */
311 snd_pcm_uframes_t boundary; /* pointers wrap point */
312
313 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
314 snd_pcm_uframes_t silence_filled; /* size filled with silence */
315
877211f5 316 union snd_pcm_sync_id sync; /* hardware synchronization ID */
1da177e4
LT		 317
318 /* -- mmap -- */
503fc85a
TI		 319 struct snd_pcm_mmap_status *status;
320 struct snd_pcm_mmap_control *control;
1da177e4
LT		 321
322 /* -- locking / scheduling -- */
5daeba34 323 snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */
c91a988d
JK		 324 wait_queue_head_t sleep; /* poll sleep */
325 wait_queue_head_t tsleep; /* transfer sleep */
1da177e4
LT		 326 struct fasync_struct *fasync;
327
328 /* -- private section -- */
329 void *private_data;
877211f5 330 void (*private_free)(struct snd_pcm_runtime *runtime);
1da177e4
LT		 331
332 /* -- hardware description -- */
877211f5
TI		 333 struct snd_pcm_hardware hw;
334 struct snd_pcm_hw_constraints hw_constraints;
1da177e4
LT		 335
336 /* -- interrupt callbacks -- */
877211f5
TI		 337 void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
338 void (*transfer_ack_end)(struct snd_pcm_substream *substream);
1da177e4
LT		 339
340 /* -- timer -- */
341 unsigned int timer_resolution; /* timer resolution */
b751eef1 342 int tstamp_type; /* timestamp type */
1da177e4
LT		 343
344 /* -- DMA -- */
345 unsigned char *dma_area; /* DMA area */
346 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
347 size_t dma_bytes; /* size of DMA area */
348
349 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
350
351#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
352 /* -- OSS things -- */
877211f5 353 struct snd_pcm_oss_runtime oss;
1da177e4 354#endif
4d96eb25
JK		 355
356#ifdef CONFIG_SND_PCM_XRUN_DEBUG
357 struct snd_pcm_hwptr_log *hwptr_log;
358#endif
1da177e4
LT		 359};
360
877211f5 361struct snd_pcm_group { /* keep linked substreams */
1da177e4
LT		 362 spinlock_t lock;
363 struct list_head substreams;
364 int count;
877211f5 365};
1da177e4 366
e7373b70
CL		 367struct pid;
368
877211f5
TI		 369struct snd_pcm_substream {
370 struct snd_pcm *pcm;
371 struct snd_pcm_str *pstr;
1da177e4
LT		 372 void *private_data; /* copied from pcm->private_data */
373 int number;
374 char name[32]; /* substream name */
375 int stream; /* stream (direction) */
cc749986 376 struct pm_qos_request latency_pm_qos_req; /* pm_qos request */
1da177e4
LT		 377 size_t buffer_bytes_max; /* limit ring buffer size */
378 struct snd_dma_buffer dma_buffer;
379 unsigned int dma_buf_id;
380 size_t dma_max;
381 /* -- hardware operations -- */
877211f5 382 struct snd_pcm_ops *ops;
1da177e4 383 /* -- runtime information -- */
877211f5 384 struct snd_pcm_runtime *runtime;
1da177e4 385 /* -- timer section -- */
877211f5 386 struct snd_timer *timer; /* timer */
1da177e4 387 unsigned timer_running: 1; /* time is running */
1da177e4 388 /* -- next substream -- */
877211f5 389 struct snd_pcm_substream *next;
1da177e4
LT		 390 /* -- linked substreams -- */
391 struct list_head link_list; /* linked list member */
877211f5
TI		 392 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
393 struct snd_pcm_group *group; /* pointer to current group */
1da177e4 394 /* -- assigned files -- */
1576274d 395 void *file;
0df63e44 396 int ref_count;
9c323fcb 397 atomic_t mmap_count;
0df63e44 398 unsigned int f_flags;
3bf75f9b 399 void (*pcm_release)(struct snd_pcm_substream *);
e7373b70 400 struct pid *pid;
1da177e4
LT		 401#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
402 /* -- OSS things -- */
877211f5 403 struct snd_pcm_oss_substream oss;
1da177e4 404#endif
b7d90a35 405#ifdef CONFIG_SND_VERBOSE_PROCFS
877211f5
TI		 406 struct snd_info_entry *proc_root;
407 struct snd_info_entry *proc_info_entry;
408 struct snd_info_entry *proc_hw_params_entry;
409 struct snd_info_entry *proc_sw_params_entry;
410 struct snd_info_entry *proc_status_entry;
411 struct snd_info_entry *proc_prealloc_entry;
c7132aeb 412 struct snd_info_entry *proc_prealloc_max_entry;
b7d90a35 413#endif
1da177e4 414 /* misc flags */
3bf75f9b 415 unsigned int hw_opened: 1;
1da177e4
LT		 416};
417
0df63e44 418#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
1da177e4
LT		 419
420
877211f5 421struct snd_pcm_str {
1da177e4 422 int stream; /* stream (direction) */
877211f5 423 struct snd_pcm *pcm;
1da177e4
LT		 424 /* -- substreams -- */
425 unsigned int substream_count;
426 unsigned int substream_opened;
877211f5 427 struct snd_pcm_substream *substream;
1da177e4
LT		 428#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
429 /* -- OSS things -- */
877211f5 430 struct snd_pcm_oss_stream oss;
1da177e4 431#endif
b7d90a35 432#ifdef CONFIG_SND_VERBOSE_PROCFS
877211f5
TI		 433 struct snd_info_entry *proc_root;
434 struct snd_info_entry *proc_info_entry;
b7d90a35 435#ifdef CONFIG_SND_PCM_XRUN_DEBUG
1da177e4 436 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
877211f5 437 struct snd_info_entry *proc_xrun_debug_entry;
1da177e4 438#endif
b7d90a35 439#endif
1da177e4
LT		 440};
441
877211f5
TI		 442struct snd_pcm {
443 struct snd_card *card;
f87135f5 444 struct list_head list;
f90c06a2 445 int device; /* device number */
1da177e4
LT		 446 unsigned int info_flags;
447 unsigned short dev_class;
448 unsigned short dev_subclass;
449 char id[64];
450 char name[80];
877211f5 451 struct snd_pcm_str streams[2];
1a60d4c5 452 struct mutex open_mutex;
1da177e4
LT		 453 wait_queue_head_t open_wait;
454 void *private_data;
877211f5 455 void (*private_free) (struct snd_pcm *pcm);
c78085fc 456 struct device *dev; /* actual hw device this belongs to */
945e5038 457 bool internal; /* pcm is for internal use only */
1da177e4 458#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
877211f5 459 struct snd_pcm_oss oss;
1da177e4
LT		 460#endif
461};
462
877211f5
TI		 463struct snd_pcm_notify {
464 int (*n_register) (struct snd_pcm * pcm);
465 int (*n_disconnect) (struct snd_pcm * pcm);
466 int (*n_unregister) (struct snd_pcm * pcm);
1da177e4 467 struct list_head list;
877211f5 468};
1da177e4
LT		 469
470/*
471 * Registering
472 */
473
54047320 474extern const struct file_operations snd_pcm_f_ops[2];
1da177e4 475
e6161653 476int snd_pcm_new(struct snd_card *card, const char *id, int device,
1da177e4 477 int playback_count, int capture_count,
877211f5 478 struct snd_pcm **rpcm);
945e5038
LG		 479int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
480 int playback_count, int capture_count,
481 struct snd_pcm **rpcm);
877211f5 482int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
1da177e4 483
877211f5 484int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
1da177e4
LT		 485
486/*
487 * Native I/O
488 */
489
490extern rwlock_t snd_pcm_link_rwlock;
491
877211f5
TI		 492int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
493int snd_pcm_info_user(struct snd_pcm_substream *substream,
494 struct snd_pcm_info __user *info);
495int snd_pcm_status(struct snd_pcm_substream *substream,
496 struct snd_pcm_status *status);
877211f5 497int snd_pcm_start(struct snd_pcm_substream *substream);
fea952e5 498int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status);
877211f5 499int snd_pcm_drain_done(struct snd_pcm_substream *substream);
1da177e4 500#ifdef CONFIG_PM
877211f5
TI		 501int snd_pcm_suspend(struct snd_pcm_substream *substream);
502int snd_pcm_suspend_all(struct snd_pcm *pcm);
1da177e4 503#endif
877211f5 504int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
3bf75f9b
TI		 505int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
506 struct snd_pcm_substream **rsubstream);
877211f5 507void snd_pcm_release_substream(struct snd_pcm_substream *substream);
3bf75f9b
TI		 508int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
509 struct snd_pcm_substream **rsubstream);
510void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
1da177e4 511void snd_pcm_vma_notify_data(void *client, void *data);
877211f5 512int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
1da177e4 513
acb03d44
EB		 514
515#ifdef CONFIG_SND_DEBUG
516void snd_pcm_debug_name(struct snd_pcm_substream *substream,
517 char *name, size_t len);
518#else
519static inline void
520snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size)
521{
522 *buf = 0;
523}
524#endif
525
1da177e4
LT		 526/*
527 * PCM library
528 */
529
877211f5 530static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
1da177e4
LT		 531{
532 return substream->group != &substream->self_group;
533}
534
877211f5 535static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
1da177e4
LT		 536{
537 read_lock(&snd_pcm_link_rwlock);
538 spin_lock(&substream->self_group.lock);
539}
540
877211f5 541static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
1da177e4
LT		 542{
543 spin_unlock(&substream->self_group.lock);
544 read_unlock(&snd_pcm_link_rwlock);
545}
546
877211f5 547static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
1da177e4
LT		 548{
549 read_lock_irq(&snd_pcm_link_rwlock);
550 spin_lock(&substream->self_group.lock);
551}
552
877211f5 553static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
1da177e4
LT		 554{
555 spin_unlock(&substream->self_group.lock);
556 read_unlock_irq(&snd_pcm_link_rwlock);
557}
558
559#define snd_pcm_stream_lock_irqsave(substream, flags) \
560do { \
561 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
562 spin_lock(&substream->self_group.lock); \
563} while (0)
564
565#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
566do { \
567 spin_unlock(&substream->self_group.lock); \
568 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
569} while (0)
570
ef991b95
TI		 571#define snd_pcm_group_for_each_entry(s, substream) \
572 list_for_each_entry(s, &substream->group->substreams, link_list)
1da177e4 573
877211f5 574static inline int snd_pcm_running(struct snd_pcm_substream *substream)
1da177e4
LT		 575{
576 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
577 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
578 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
579}
580
877211f5 581static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 582{
583 return size * 8 / runtime->sample_bits;
584}
585
877211f5 586static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 587{
588 return size * 8 / runtime->frame_bits;
589}
590
877211f5 591static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 592{
593 return size * runtime->sample_bits / 8;
594}
595
877211f5 596static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
1da177e4
LT		 597{
598 return size * runtime->frame_bits / 8;
599}
600
877211f5 601static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
1da177e4
LT		 602{
603 return bytes % runtime->byte_align == 0;
604}
605
877211f5 606static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
1da177e4 607{
877211f5 608 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 609 return frames_to_bytes(runtime, runtime->buffer_size);
610}
611
877211f5 612static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
1da177e4 613{
877211f5 614 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 615 return frames_to_bytes(runtime, runtime->period_size);
616}
617
618/*
619 * result is: 0 ... (boundary - 1)
620 */
877211f5 621static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 622{
623 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
624 if (avail < 0)
625 avail += runtime->boundary;
626 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
627 avail -= runtime->boundary;
628 return avail;
629}
630
631/*
632 * result is: 0 ... (boundary - 1)
633 */
877211f5 634static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 635{
636 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
637 if (avail < 0)
638 avail += runtime->boundary;
639 return avail;
640}
641
877211f5 642static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 643{
644 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
645}
646
877211f5 647static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 648{
649 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
650}
651
652/**
653 * snd_pcm_playback_ready - check whether the playback buffer is available
654 * @substream: the pcm substream instance
655 *
656 * Checks whether enough free space is available on the playback buffer.
657 *
658 * Returns non-zero if available, or zero if not.
659 */
877211f5 660static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
1da177e4 661{
877211f5 662 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 663 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
664}
665
666/**
667 * snd_pcm_capture_ready - check whether the capture buffer is available
668 * @substream: the pcm substream instance
669 *
670 * Checks whether enough capture data is available on the capture buffer.
671 *
672 * Returns non-zero if available, or zero if not.
673 */
877211f5 674static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
1da177e4 675{
877211f5 676 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 677 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
678}
679
680/**
681 * snd_pcm_playback_data - check whether any data exists on the playback buffer
682 * @substream: the pcm substream instance
683 *
684 * Checks whether any data exists on the playback buffer. If stop_threshold
685 * is bigger or equal to boundary, then this function returns always non-zero.
686 *
687 * Returns non-zero if exists, or zero if not.
688 */
877211f5 689static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
1da177e4 690{
877211f5 691 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 692
693 if (runtime->stop_threshold >= runtime->boundary)
694 return 1;
695 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
696}
697
698/**
699 * snd_pcm_playback_empty - check whether the playback buffer is empty
700 * @substream: the pcm substream instance
701 *
702 * Checks whether the playback buffer is empty.
703 *
704 * Returns non-zero if empty, or zero if not.
705 */
877211f5 706static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
1da177e4 707{
877211f5 708 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 709 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
710}
711
712/**
713 * snd_pcm_capture_empty - check whether the capture buffer is empty
714 * @substream: the pcm substream instance
715 *
716 * Checks whether the capture buffer is empty.
717 *
718 * Returns non-zero if empty, or zero if not.
719 */
877211f5 720static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
1da177e4 721{
877211f5 722 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 723 return snd_pcm_capture_avail(runtime) == 0;
724}
725
877211f5
TI		 726static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
727 struct snd_pcm_substream *master)
1da177e4
LT		 728{
729 substream->runtime->trigger_master = master;
730}
731
732static inline int hw_is_mask(int var)
733{
734 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
735 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
736}
737
738static inline int hw_is_interval(int var)
739{
740 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
741 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
742}
743
877211f5 744static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
1da177e4
LT		 745 snd_pcm_hw_param_t var)
746{
747 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
748}
749
877211f5 750static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
1da177e4
LT		 751 snd_pcm_hw_param_t var)
752{
753 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
754}
755
877211f5 756static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 757 snd_pcm_hw_param_t var)
758{
b9f09a48 759 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
1da177e4
LT		 760}
761
877211f5 762static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 763 snd_pcm_hw_param_t var)
764{
b9f09a48 765 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
1da177e4
LT		 766}
767
b51beb75
TI		 768#define params_channels(p) \
769 (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min)
770#define params_rate(p) \
771 (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_RATE)->min)
772#define params_period_size(p) \
773 (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min)
774#define params_periods(p) \
775 (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIODS)->min)
776#define params_buffer_size(p) \
777 (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min)
778#define params_buffer_bytes(p) \
779 (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min)
1da177e4 780
877211f5
TI		 781int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
782void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
783void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
784void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
785 unsigned int k, struct snd_interval *c);
786void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
787 const struct snd_interval *b, struct snd_interval *c);
4af87a93
MB		 788int snd_interval_list(struct snd_interval *i, unsigned int count,
789 const unsigned int *list, unsigned int mask);
877211f5
TI		 790int snd_interval_ratnum(struct snd_interval *i,
791 unsigned int rats_count, struct snd_ratnum *rats,
1da177e4
LT		 792 unsigned int *nump, unsigned int *denp);
793
877211f5
TI		 794void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
795void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
877211f5 796int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 797
877211f5 798int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 799
877211f5
TI		 800int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
801int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
1da177e4 802
877211f5 803int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 804 u_int32_t mask);
877211f5 805int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 806 u_int64_t mask);
877211f5 807int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 808 unsigned int min, unsigned int max);
877211f5
TI		 809int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
810int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
1da177e4
LT		 811 unsigned int cond,
812 snd_pcm_hw_param_t var,
877211f5
TI		 813 struct snd_pcm_hw_constraint_list *l);
814int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
1da177e4
LT		 815 unsigned int cond,
816 snd_pcm_hw_param_t var,
877211f5
TI		 817 struct snd_pcm_hw_constraint_ratnums *r);
818int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
1da177e4
LT		 819 unsigned int cond,
820 snd_pcm_hw_param_t var,
877211f5
TI		 821 struct snd_pcm_hw_constraint_ratdens *r);
822int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
1da177e4
LT		 823 unsigned int cond,
824 unsigned int width,
825 unsigned int msbits);
877211f5 826int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
1da177e4
LT		 827 unsigned int cond,
828 snd_pcm_hw_param_t var,
829 unsigned long step);
877211f5 830int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
1da177e4
LT		 831 unsigned int cond,
832 snd_pcm_hw_param_t var);
d5b702a6
CL		 833int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime,
834 unsigned int base_rate);
877211f5 835int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
1da177e4
LT		 836 unsigned int cond,
837 int var,
838 snd_pcm_hw_rule_func_t func, void *private,
839 int dep, ...);
840
841int snd_pcm_format_signed(snd_pcm_format_t format);
842int snd_pcm_format_unsigned(snd_pcm_format_t format);
843int snd_pcm_format_linear(snd_pcm_format_t format);
844int snd_pcm_format_little_endian(snd_pcm_format_t format);
845int snd_pcm_format_big_endian(snd_pcm_format_t format);
1b44c28d
TI		 846#if 0 /* just for DocBook */
847/**
9502dcad
TI		 848 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
849 * @format: the format to check
850 *
851 * Returns 1 if the given PCM format is CPU-endian, 0 if
852 * opposite, or a negative error code if endian not specified.
853 */
8cdfd251 854int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1b44c28d 855#endif /* DocBook */
9502dcad 856#ifdef SNDRV_LITTLE_ENDIAN
9d01a82e 857#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
9502dcad 858#else
9d01a82e 859#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
9502dcad 860#endif
1da177e4
LT		 861int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
862int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
9502dcad 863ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1da177e4
LT		 864const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
865int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
866snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
1da177e4 867
877211f5
TI		 868void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
869void snd_pcm_set_sync(struct snd_pcm_substream *substream);
870int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
871int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
1da177e4 872 unsigned int cmd, void *arg);
1250932e
JK		 873int snd_pcm_update_state(struct snd_pcm_substream *substream,
874 struct snd_pcm_runtime *runtime);
877211f5
TI		 875int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
876int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
877int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
878int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
879int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
880void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
877211f5
TI		 881void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
882snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
1da177e4
LT		 883 const void __user *buf,
884 snd_pcm_uframes_t frames);
877211f5 885snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
1da177e4 886 void __user *buf, snd_pcm_uframes_t frames);
877211f5 887snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
1da177e4 888 void __user **bufs, snd_pcm_uframes_t frames);
877211f5 889snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
1da177e4
LT		 890 void __user **bufs, snd_pcm_uframes_t frames);
891
7653d557
CL		 892extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
893
877211f5 894int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
918f3a0e 895unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
1da177e4 896
877211f5 897static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
1da177e4
LT		 898 struct snd_dma_buffer *bufp)
899{
877211f5 900 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 901 if (bufp) {
902 runtime->dma_buffer_p = bufp;
903 runtime->dma_area = bufp->area;
904 runtime->dma_addr = bufp->addr;
905 runtime->dma_bytes = bufp->bytes;
906 } else {
907 runtime->dma_buffer_p = NULL;
908 runtime->dma_area = NULL;
909 runtime->dma_addr = 0;
910 runtime->dma_bytes = 0;
911 }
912}
913
914/*
915 * Timer interface
916 */
917
877211f5
TI		 918void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
919void snd_pcm_timer_init(struct snd_pcm_substream *substream);
920void snd_pcm_timer_done(struct snd_pcm_substream *substream);
1da177e4 921
b751eef1
JK		 922static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
923 struct timespec *tv)
924{
925 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
926 do_posix_clock_monotonic_gettime(tv);
927 else
928 getnstimeofday(tv);
929}
930
1da177e4
LT		 931/*
932 * Memory
933 */
934
877211f5
TI		 935int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
936int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
937int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
1da177e4
LT		 938 int type, struct device *data,
939 size_t size, size_t max);
877211f5 940int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
1da177e4
LT		 941 int type, void *data,
942 size_t size, size_t max);
877211f5
TI		 943int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
944int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
1da177e4 945
681b84e1
CL		 946int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
947 size_t size, gfp_t gfp_flags);
948int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
949struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
950 unsigned long offset);
951#if 0 /* for kernel-doc */
952/**
953 * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
954 * @substream: the substream to allocate the buffer to
955 * @size: the requested buffer size, in bytes
956 *
957 * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is
958 * contiguous in kernel virtual space, but not in physical memory. Use this
959 * if the buffer is accessed by kernel code but not by device DMA.
960 *
961 * Returns 1 if the buffer was changed, 0 if not changed, or a negative error
962 * code.
963 */
964static int snd_pcm_lib_alloc_vmalloc_buffer
965 (struct snd_pcm_substream *substream, size_t size);
966/**
967 * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer
968 * @substream: the substream to allocate the buffer to
969 * @size: the requested buffer size, in bytes
970 *
971 * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses
972 * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory.
973 */
974static int snd_pcm_lib_alloc_vmalloc_32_buffer
975 (struct snd_pcm_substream *substream, size_t size);
976#endif
977#define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \
978 _snd_pcm_lib_alloc_vmalloc_buffer \
979 (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO)
980#define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \
981 _snd_pcm_lib_alloc_vmalloc_buffer \
982 (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO)
983
cc6a8acd 984#ifdef CONFIG_SND_DMA_SGBUF
77a23f26
TI		 985/*
986 * SG-buffer handling
987 */
988#define snd_pcm_substream_sgbuf(substream) \
989 ((substream)->runtime->dma_buffer_p->private_data)
990
991static inline dma_addr_t
992snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
993{
994 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
995 return snd_sgbuf_get_addr(sg, ofs);
996}
997
998static inline void *
999snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
1000{
1001 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
1002 return snd_sgbuf_get_ptr(sg, ofs);
1003}
1004
1005struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
1006 unsigned long offset);
51e9f2e6
TI		 1007unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
1008 unsigned int ofs, unsigned int size);
1da177e4 1009
cc6a8acd
TI		 1010#else /* !SND_DMA_SGBUF */
1011/*
1012 * fake using a continuous buffer
1013 */
1014static inline dma_addr_t
1015snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
1016{
1017 return substream->runtime->dma_addr + ofs;
1018}
1019
1020static inline void *
1021snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
1022{
1023 return substream->runtime->dma_area + ofs;
1024}
1025
1026#define snd_pcm_sgbuf_ops_page NULL
1027
1028#define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size)
1029
1030#endif /* SND_DMA_SGBUF */
1031
1da177e4
LT		 1032/* handle mmap counter - PCM mmap callback should handle this counter properly */
1033static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1034{
877211f5 1035 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 1036 atomic_inc(&substream->mmap_count);
1da177e4
LT		 1037}
1038
1039static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1040{
877211f5 1041 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 1042 atomic_dec(&substream->mmap_count);
1da177e4
LT		 1043}
1044
18a2b962
TI		 1045int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
1046 struct vm_area_struct *area);
1da177e4
LT		 1047/* mmap for io-memory area */
1048#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1049#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
877211f5 1050int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1da177e4
LT		 1051#else
1052#define SNDRV_PCM_INFO_MMAP_IOMEM 0
1053#define snd_pcm_lib_mmap_iomem NULL
1054#endif
1055
3674f19d 1056#define snd_pcm_lib_mmap_vmalloc NULL
c32d977b 1057
1da177e4
LT		 1058static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1059{
1060 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1061}
1062
1063/*
1064 * Misc
1065 */
1066
1067#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1068 (IEC958_AES1_CON_ORIGINAL<<8)|\
1069 (IEC958_AES1_CON_PCM_CODER<<8)|\
1070 (IEC958_AES3_CON_FS_48000<<24))
1071
7eaa943c
TI		 1072#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1073
6e5265ec
TI		 1074const char *snd_pcm_format_name(snd_pcm_format_t format);
1075
1da177e4 1076#endif /* __SOUND_PCM_H */
kernel source for telekom puls (alcatel/mediatek)