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Merge remote-tracking branches 'asoc/topic/ab8500', 'asoc/topic/adau17x1', 'asoc...
[deliverable/linux.git] / include / sound / pcm.h
CommitLineData
1da177e4
LT		 1#ifndef __SOUND_PCM_H
2#define __SOUND_PCM_H
3
4/*
5 * Digital Audio (PCM) abstract layer
c1017a4c 6 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 7 * Abramo Bagnara <abramo@alsa-project.org>
8 *
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25
26#include <sound/asound.h>
27#include <sound/memalloc.h>
f90c06a2 28#include <sound/minors.h>
1da177e4 29#include <linux/poll.h>
f23f6e08 30#include <linux/mm.h>
1da177e4 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 37#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
a1ce3928 38#include <sound/pcm_oss.h>
1da177e4
LT		 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
229d0430
PLB		 63struct snd_pcm_audio_tstamp_config; /* definitions further down */
64struct snd_pcm_audio_tstamp_report;
65
877211f5
TI		 66struct snd_pcm_ops {
67 int (*open)(struct snd_pcm_substream *substream);
68 int (*close)(struct snd_pcm_substream *substream);
69 int (*ioctl)(struct snd_pcm_substream * substream,
1da177e4 70 unsigned int cmd, void *arg);
877211f5
TI		 71 int (*hw_params)(struct snd_pcm_substream *substream,
72 struct snd_pcm_hw_params *params);
73 int (*hw_free)(struct snd_pcm_substream *substream);
74 int (*prepare)(struct snd_pcm_substream *substream);
75 int (*trigger)(struct snd_pcm_substream *substream, int cmd);
76 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
3179f620
PLB		 77 int (*get_time_info)(struct snd_pcm_substream *substream,
78 struct timespec *system_ts, struct timespec *audio_ts,
79 struct snd_pcm_audio_tstamp_config *audio_tstamp_config,
80 struct snd_pcm_audio_tstamp_report *audio_tstamp_report);
877211f5
TI		 81 int (*copy)(struct snd_pcm_substream *substream, int channel,
82 snd_pcm_uframes_t pos,
1da177e4 83 void __user *buf, snd_pcm_uframes_t count);
877211f5 84 int (*silence)(struct snd_pcm_substream *substream, int channel,
1da177e4 85 snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
877211f5
TI		 86 struct page *(*page)(struct snd_pcm_substream *substream,
87 unsigned long offset);
88 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
89 int (*ack)(struct snd_pcm_substream *substream);
90};
1da177e4
LT		 91
92/*
93 *
94 */
95
f90c06a2
PM		 96#if defined(CONFIG_SND_DYNAMIC_MINORS)
97#define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2)
98#else
99#define SNDRV_PCM_DEVICES 8
100#endif
896e6cc2 101
1da177e4
LT		 102#define SNDRV_PCM_IOCTL1_RESET 0
103#define SNDRV_PCM_IOCTL1_INFO 1
104#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
105#define SNDRV_PCM_IOCTL1_GSTATE 3
8bea869c 106#define SNDRV_PCM_IOCTL1_FIFO_SIZE 4
1da177e4
LT		 107
108#define SNDRV_PCM_TRIGGER_STOP 0
109#define SNDRV_PCM_TRIGGER_START 1
110#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
111#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
112#define SNDRV_PCM_TRIGGER_SUSPEND 5
113#define SNDRV_PCM_TRIGGER_RESUME 6
48d88297 114#define SNDRV_PCM_TRIGGER_DRAIN 7
1da177e4
LT		 115
116#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
117
118/* If you change this don't forget to change rates[] table in pcm_native.c */
119#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
120#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
121#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
122#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
123#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
124#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
125#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
126#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
127#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
128#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
129#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
130#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
131#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
132
133#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
134#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
135
136#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
137 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
138 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
139#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
140#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
141 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
142#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
143 SNDRV_PCM_RATE_192000)
fea952e5
CL		 144#define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt)
145#define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8)
146#define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8)
147#define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE)
148#define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE)
149#define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE)
150#define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE)
151#define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE)
152#define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE)
153#define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE)
154#define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE)
155#define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE)
156#define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE)
157#define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE)
158#define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE)
159#define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE)
160#define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE)
161#define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE)
162#define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE)
163#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE)
164#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE)
165#define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW)
166#define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW)
167#define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM)
168#define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG)
169#define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM)
170#define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL)
171#define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE)
172#define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE)
173#define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE)
174#define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE)
175#define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE)
176#define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE)
177#define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE)
178#define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE)
179#define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE)
180#define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE)
181#define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE)
182#define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE)
183#define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24)
184#define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B)
185#define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40)
186#define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B)
ef7a4f97
DM		 187#define SNDRV_PCM_FMTBIT_DSD_U8 _SNDRV_PCM_FMTBIT(DSD_U8)
188#define SNDRV_PCM_FMTBIT_DSD_U16_LE _SNDRV_PCM_FMTBIT(DSD_U16_LE)
d4288d3f 189#define SNDRV_PCM_FMTBIT_DSD_U32_LE _SNDRV_PCM_FMTBIT(DSD_U32_LE)
d42472ec
JL		 190#define SNDRV_PCM_FMTBIT_DSD_U16_BE _SNDRV_PCM_FMTBIT(DSD_U16_BE)
191#define SNDRV_PCM_FMTBIT_DSD_U32_BE _SNDRV_PCM_FMTBIT(DSD_U32_BE)
1da177e4
LT		 192
193#ifdef SNDRV_LITTLE_ENDIAN
194#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
195#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
196#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
197#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
198#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
199#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
200#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
201#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
202#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
203#endif
204#ifdef SNDRV_BIG_ENDIAN
205#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
206#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
207#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
208#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
209#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
210#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
211#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
212#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
213#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
214#endif
215
877211f5
TI		 216struct snd_pcm_file {
217 struct snd_pcm_substream *substream;
548a648b 218 int no_compat_mmap;
1da177e4
LT		 219};
220
877211f5
TI		 221struct snd_pcm_hw_rule;
222typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
223 struct snd_pcm_hw_rule *rule);
1da177e4 224
877211f5 225struct snd_pcm_hw_rule {
1da177e4 226 unsigned int cond;
1da177e4
LT		 227 int var;
228 int deps[4];
d16efa06
LPC		 229
230 snd_pcm_hw_rule_func_t func;
1da177e4
LT		 231 void *private;
232};
233
877211f5
TI		 234struct snd_pcm_hw_constraints {
235 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
1da177e4 236 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
877211f5 237 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
1da177e4
LT		 238 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
239 unsigned int rules_num;
240 unsigned int rules_all;
877211f5
TI		 241 struct snd_pcm_hw_rule *rules;
242};
1da177e4 243
877211f5
TI		 244static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
245 snd_pcm_hw_param_t var)
1da177e4
LT		 246{
247 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
248}
249
877211f5
TI		 250static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
251 snd_pcm_hw_param_t var)
1da177e4
LT		 252{
253 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
254}
255
877211f5 256struct snd_ratnum {
1da177e4
LT		 257 unsigned int num;
258 unsigned int den_min, den_max, den_step;
877211f5 259};
1da177e4 260
877211f5 261struct snd_ratden {
1da177e4
LT		 262 unsigned int num_min, num_max, num_step;
263 unsigned int den;
877211f5 264};
1da177e4 265
877211f5 266struct snd_pcm_hw_constraint_ratnums {
1da177e4 267 int nrats;
e5e113cf 268 const struct snd_ratnum *rats;
877211f5 269};
1da177e4 270
877211f5 271struct snd_pcm_hw_constraint_ratdens {
1da177e4 272 int nrats;
e5e113cf 273 const struct snd_ratden *rats;
877211f5 274};
1da177e4 275
877211f5 276struct snd_pcm_hw_constraint_list {
4af87a93 277 const unsigned int *list;
782e50e0 278 unsigned int count;
1da177e4 279 unsigned int mask;
877211f5 280};
1da177e4 281
f66f898e
PR		 282struct snd_pcm_hw_constraint_ranges {
283 unsigned int count;
284 const struct snd_interval *ranges;
285 unsigned int mask;
286};
287
229d0430
PLB		 288/*
289 * userspace-provided audio timestamp config to kernel,
290 * structure is for internal use only and filled with dedicated unpack routine
291 */
292struct snd_pcm_audio_tstamp_config {
293 /* 5 of max 16 bits used */
294 u32 type_requested:4;
295 u32 report_delay:1; /* add total delay to A/D or D/A */
296};
297
298static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data,
299 struct snd_pcm_audio_tstamp_config *config)
300{
301 config->type_requested = data & 0xF;
302 config->report_delay = (data >> 4) & 1;
303}
304
305/*
306 * kernel-provided audio timestamp report to user-space
307 * structure is for internal use only and read by dedicated pack routine
308 */
309struct snd_pcm_audio_tstamp_report {
310 /* 6 of max 16 bits used for bit-fields */
311
312 /* for backwards compatibility */
313 u32 valid:1;
314
315 /* actual type if hardware could not support requested timestamp */
316 u32 actual_type:4;
317
318 /* accuracy represented in ns units */
319 u32 accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */
320 u32 accuracy; /* up to 4.29s, will be packed in separate field */
321};
322
323static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy,
324 const struct snd_pcm_audio_tstamp_report *report)
325{
326 u32 tmp;
327
328 tmp = report->accuracy_report;
329 tmp <<= 4;
330 tmp |= report->actual_type;
331 tmp <<= 1;
332 tmp |= report->valid;
333
334 *data &= 0xffff; /* zero-clear MSBs */
335 *data |= (tmp << 16);
336 *accuracy = report->accuracy;
337}
338
339
877211f5 340struct snd_pcm_runtime {
1da177e4 341 /* -- Status -- */
877211f5 342 struct snd_pcm_substream *trigger_master;
07799e75 343 struct timespec trigger_tstamp; /* trigger timestamp */
2b79d7a6 344 bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */
1da177e4
LT		 345 int overrange;
346 snd_pcm_uframes_t avail_max;
347 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
e7636925 348 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
bbf6ad13 349 unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
bd76af0f 350 unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */
4bbe1ddf 351 snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */
0e8014d7 352 u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */
1da177e4
LT		 353
354 /* -- HW params -- */
355 snd_pcm_access_t access; /* access mode */
356 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
357 snd_pcm_subformat_t subformat; /* subformat */
358 unsigned int rate; /* rate in Hz */
359 unsigned int channels; /* channels */
360 snd_pcm_uframes_t period_size; /* period size */
361 unsigned int periods; /* periods */
362 snd_pcm_uframes_t buffer_size; /* buffer size */
1da177e4
LT		 363 snd_pcm_uframes_t min_align; /* Min alignment for the format */
364 size_t byte_align;
365 unsigned int frame_bits;
366 unsigned int sample_bits;
367 unsigned int info;
368 unsigned int rate_num;
369 unsigned int rate_den;
ab69a490 370 unsigned int no_period_wakeup: 1;
1da177e4
LT		 371
372 /* -- SW params -- */
877211f5 373 int tstamp_mode; /* mmap timestamp is updated */
1da177e4 374 unsigned int period_step;
1da177e4
LT		 375 snd_pcm_uframes_t start_threshold;
376 snd_pcm_uframes_t stop_threshold;
377 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
378 noise is nearest than this */
379 snd_pcm_uframes_t silence_size; /* Silence filling size */
380 snd_pcm_uframes_t boundary; /* pointers wrap point */
381
382 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
383 snd_pcm_uframes_t silence_filled; /* size filled with silence */
384
877211f5 385 union snd_pcm_sync_id sync; /* hardware synchronization ID */
1da177e4
LT		 386
387 /* -- mmap -- */
503fc85a
TI		 388 struct snd_pcm_mmap_status *status;
389 struct snd_pcm_mmap_control *control;
1da177e4
LT		 390
391 /* -- locking / scheduling -- */
5daeba34 392 snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */
c91a988d
JK		 393 wait_queue_head_t sleep; /* poll sleep */
394 wait_queue_head_t tsleep; /* transfer sleep */
1da177e4
LT		 395 struct fasync_struct *fasync;
396
397 /* -- private section -- */
398 void *private_data;
877211f5 399 void (*private_free)(struct snd_pcm_runtime *runtime);
1da177e4
LT		 400
401 /* -- hardware description -- */
877211f5
TI		 402 struct snd_pcm_hardware hw;
403 struct snd_pcm_hw_constraints hw_constraints;
1da177e4 404
1da177e4
LT		 405 /* -- timer -- */
406 unsigned int timer_resolution; /* timer resolution */
b751eef1 407 int tstamp_type; /* timestamp type */
1da177e4
LT		 408
409 /* -- DMA -- */
410 unsigned char *dma_area; /* DMA area */
411 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
412 size_t dma_bytes; /* size of DMA area */
413
414 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
415
229d0430
PLB		 416 /* -- audio timestamp config -- */
417 struct snd_pcm_audio_tstamp_config audio_tstamp_config;
418 struct snd_pcm_audio_tstamp_report audio_tstamp_report;
419 struct timespec driver_tstamp;
420
1da177e4
LT		 421#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
422 /* -- OSS things -- */
877211f5 423 struct snd_pcm_oss_runtime oss;
1da177e4
LT		 424#endif
425};
426
877211f5 427struct snd_pcm_group { /* keep linked substreams */
1da177e4 428 spinlock_t lock;
257f8cce 429 struct mutex mutex;
1da177e4
LT		 430 struct list_head substreams;
431 int count;
877211f5 432};
1da177e4 433
e7373b70
CL		 434struct pid;
435
877211f5
TI		 436struct snd_pcm_substream {
437 struct snd_pcm *pcm;
438 struct snd_pcm_str *pstr;
1da177e4
LT		 439 void *private_data; /* copied from pcm->private_data */
440 int number;
441 char name[32]; /* substream name */
442 int stream; /* stream (direction) */
cc749986 443 struct pm_qos_request latency_pm_qos_req; /* pm_qos request */
1da177e4
LT		 444 size_t buffer_bytes_max; /* limit ring buffer size */
445 struct snd_dma_buffer dma_buffer;
1da177e4
LT		 446 size_t dma_max;
447 /* -- hardware operations -- */
e6c2e7eb 448 const struct snd_pcm_ops *ops;
1da177e4 449 /* -- runtime information -- */
877211f5 450 struct snd_pcm_runtime *runtime;
1da177e4 451 /* -- timer section -- */
877211f5 452 struct snd_timer *timer; /* timer */
1da177e4 453 unsigned timer_running: 1; /* time is running */
1da177e4 454 /* -- next substream -- */
877211f5 455 struct snd_pcm_substream *next;
1da177e4
LT		 456 /* -- linked substreams -- */
457 struct list_head link_list; /* linked list member */
877211f5
TI		 458 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
459 struct snd_pcm_group *group; /* pointer to current group */
1da177e4 460 /* -- assigned files -- */
1576274d 461 void *file;
0df63e44 462 int ref_count;
9c323fcb 463 atomic_t mmap_count;
0df63e44 464 unsigned int f_flags;
3bf75f9b 465 void (*pcm_release)(struct snd_pcm_substream *);
e7373b70 466 struct pid *pid;
1da177e4
LT		 467#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
468 /* -- OSS things -- */
877211f5 469 struct snd_pcm_oss_substream oss;
1da177e4 470#endif
b7d90a35 471#ifdef CONFIG_SND_VERBOSE_PROCFS
877211f5
TI		 472 struct snd_info_entry *proc_root;
473 struct snd_info_entry *proc_info_entry;
474 struct snd_info_entry *proc_hw_params_entry;
475 struct snd_info_entry *proc_sw_params_entry;
476 struct snd_info_entry *proc_status_entry;
477 struct snd_info_entry *proc_prealloc_entry;
c7132aeb 478 struct snd_info_entry *proc_prealloc_max_entry;
2b30d411
TI		 479#ifdef CONFIG_SND_PCM_XRUN_DEBUG
480 struct snd_info_entry *proc_xrun_injection_entry;
b7d90a35 481#endif
2b30d411 482#endif /* CONFIG_SND_VERBOSE_PROCFS */
1da177e4 483 /* misc flags */
3bf75f9b 484 unsigned int hw_opened: 1;
1da177e4
LT		 485};
486
0df63e44 487#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
1da177e4
LT		 488
489
877211f5 490struct snd_pcm_str {
1da177e4 491 int stream; /* stream (direction) */
877211f5 492 struct snd_pcm *pcm;
1da177e4
LT		 493 /* -- substreams -- */
494 unsigned int substream_count;
495 unsigned int substream_opened;
877211f5 496 struct snd_pcm_substream *substream;
1da177e4
LT		 497#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
498 /* -- OSS things -- */
877211f5 499 struct snd_pcm_oss_stream oss;
1da177e4 500#endif
b7d90a35 501#ifdef CONFIG_SND_VERBOSE_PROCFS
877211f5
TI		 502 struct snd_info_entry *proc_root;
503 struct snd_info_entry *proc_info_entry;
b7d90a35 504#ifdef CONFIG_SND_PCM_XRUN_DEBUG
1da177e4 505 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
877211f5 506 struct snd_info_entry *proc_xrun_debug_entry;
1da177e4 507#endif
b7d90a35 508#endif
2d3391ec 509 struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */
ef46c7af 510 struct device dev;
1da177e4
LT		 511};
512
877211f5
TI		 513struct snd_pcm {
514 struct snd_card *card;
f87135f5 515 struct list_head list;
f90c06a2 516 int device; /* device number */
1da177e4
LT		 517 unsigned int info_flags;
518 unsigned short dev_class;
519 unsigned short dev_subclass;
520 char id[64];
521 char name[80];
877211f5 522 struct snd_pcm_str streams[2];
1a60d4c5 523 struct mutex open_mutex;
1da177e4
LT		 524 wait_queue_head_t open_wait;
525 void *private_data;
877211f5 526 void (*private_free) (struct snd_pcm *pcm);
945e5038 527 bool internal; /* pcm is for internal use only */
257f8cce 528 bool nonatomic; /* whole PCM operations are in non-atomic context */
1da177e4 529#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
877211f5 530 struct snd_pcm_oss oss;
1da177e4
LT		 531#endif
532};
533
877211f5
TI		 534struct snd_pcm_notify {
535 int (*n_register) (struct snd_pcm * pcm);
536 int (*n_disconnect) (struct snd_pcm * pcm);
537 int (*n_unregister) (struct snd_pcm * pcm);
1da177e4 538 struct list_head list;
877211f5 539};
1da177e4
LT		 540
541/*
542 * Registering
543 */
544
54047320 545extern const struct file_operations snd_pcm_f_ops[2];
1da177e4 546
e6161653 547int snd_pcm_new(struct snd_card *card, const char *id, int device,
1da177e4 548 int playback_count, int capture_count,
877211f5 549 struct snd_pcm **rpcm);
945e5038
LG		 550int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
551 int playback_count, int capture_count,
552 struct snd_pcm **rpcm);
877211f5 553int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
1da177e4 554
877211f5 555int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
1da177e4
LT		 556
557/*
558 * Native I/O
559 */
560
877211f5
TI		 561int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
562int snd_pcm_info_user(struct snd_pcm_substream *substream,
563 struct snd_pcm_info __user *info);
564int snd_pcm_status(struct snd_pcm_substream *substream,
565 struct snd_pcm_status *status);
877211f5 566int snd_pcm_start(struct snd_pcm_substream *substream);
fea952e5 567int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status);
877211f5 568int snd_pcm_drain_done(struct snd_pcm_substream *substream);
1fb8510c 569int snd_pcm_stop_xrun(struct snd_pcm_substream *substream);
1da177e4 570#ifdef CONFIG_PM
877211f5
TI		 571int snd_pcm_suspend(struct snd_pcm_substream *substream);
572int snd_pcm_suspend_all(struct snd_pcm *pcm);
1da177e4 573#endif
877211f5 574int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
3bf75f9b
TI		 575int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
576 struct snd_pcm_substream **rsubstream);
877211f5 577void snd_pcm_release_substream(struct snd_pcm_substream *substream);
3bf75f9b
TI		 578int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
579 struct snd_pcm_substream **rsubstream);
580void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
877211f5 581int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
1da177e4 582
acb03d44
EB		 583
584#ifdef CONFIG_SND_DEBUG
585void snd_pcm_debug_name(struct snd_pcm_substream *substream,
586 char *name, size_t len);
587#else
588static inline void
589snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size)
590{
591 *buf = 0;
592}
593#endif
594
1da177e4
LT		 595/*
596 * PCM library
597 */
598
30b771cf
TI		 599/**
600 * snd_pcm_stream_linked - Check whether the substream is linked with others
601 * @substream: substream to check
602 *
603 * Returns true if the given substream is being linked with others.
604 */
877211f5 605static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
1da177e4
LT		 606{
607 return substream->group != &substream->self_group;
608}
609
7af142f7
TI		 610void snd_pcm_stream_lock(struct snd_pcm_substream *substream);
611void snd_pcm_stream_unlock(struct snd_pcm_substream *substream);
612void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream);
613void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream);
614unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream);
30b771cf
TI		 615
616/**
617 * snd_pcm_stream_lock_irqsave - Lock the PCM stream
618 * @substream: PCM substream
619 * @flags: irq flags
620 *
621 * This locks the PCM stream like snd_pcm_stream_lock() but with the local
622 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
623 * as snd_pcm_stream_lock().
624 */
7af142f7
TI		 625#define snd_pcm_stream_lock_irqsave(substream, flags) \
626 do { \
627 typecheck(unsigned long, flags); \
628 flags = _snd_pcm_stream_lock_irqsave(substream); \
629 } while (0)
630void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
631 unsigned long flags);
1da177e4 632
30b771cf
TI		 633/**
634 * snd_pcm_group_for_each_entry - iterate over the linked substreams
635 * @s: the iterator
636 * @substream: the substream
637 *
638 * Iterate over the all linked substreams to the given @substream.
639 * When @substream isn't linked with any others, this gives returns @substream
640 * itself once.
641 */
ef991b95
TI		 642#define snd_pcm_group_for_each_entry(s, substream) \
643 list_for_each_entry(s, &substream->group->substreams, link_list)
1da177e4 644
30b771cf
TI		 645/**
646 * snd_pcm_running - Check whether the substream is in a running state
647 * @substream: substream to check
648 *
649 * Returns true if the given substream is in the state RUNNING, or in the
650 * state DRAINING for playback.
651 */
877211f5 652static inline int snd_pcm_running(struct snd_pcm_substream *substream)
1da177e4
LT		 653{
654 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
655 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
656 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
657}
658
30b771cf
TI		 659/**
660 * bytes_to_samples - Unit conversion of the size from bytes to samples
661 * @runtime: PCM runtime instance
662 * @size: size in bytes
663 */
877211f5 664static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 665{
666 return size * 8 / runtime->sample_bits;
667}
668
30b771cf
TI		 669/**
670 * bytes_to_frames - Unit conversion of the size from bytes to frames
671 * @runtime: PCM runtime instance
672 * @size: size in bytes
673 */
877211f5 674static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 675{
676 return size * 8 / runtime->frame_bits;
677}
678
30b771cf
TI		 679/**
680 * samples_to_bytes - Unit conversion of the size from samples to bytes
681 * @runtime: PCM runtime instance
682 * @size: size in samples
683 */
877211f5 684static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 685{
686 return size * runtime->sample_bits / 8;
687}
688
30b771cf
TI		 689/**
690 * frames_to_bytes - Unit conversion of the size from frames to bytes
691 * @runtime: PCM runtime instance
692 * @size: size in frames
693 */
877211f5 694static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
1da177e4
LT		 695{
696 return size * runtime->frame_bits / 8;
697}
698
30b771cf
TI		 699/**
700 * frame_aligned - Check whether the byte size is aligned to frames
701 * @runtime: PCM runtime instance
702 * @bytes: size in bytes
703 */
877211f5 704static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
1da177e4
LT		 705{
706 return bytes % runtime->byte_align == 0;
707}
708
30b771cf
TI		 709/**
710 * snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes
711 * @substream: PCM substream
712 */
877211f5 713static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
1da177e4 714{
877211f5 715 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 716 return frames_to_bytes(runtime, runtime->buffer_size);
717}
718
30b771cf
TI		 719/**
720 * snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes
721 * @substream: PCM substream
722 */
877211f5 723static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
1da177e4 724{
877211f5 725 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 726 return frames_to_bytes(runtime, runtime->period_size);
727}
728
30b771cf
TI		 729/**
730 * snd_pcm_playback_avail - Get the available (writable) space for playback
731 * @runtime: PCM runtime instance
732 *
733 * Result is between 0 ... (boundary - 1)
1da177e4 734 */
877211f5 735static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 736{
737 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
738 if (avail < 0)
739 avail += runtime->boundary;
740 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
741 avail -= runtime->boundary;
742 return avail;
743}
744
30b771cf
TI		 745/**
746 * snd_pcm_playback_avail - Get the available (readable) space for capture
747 * @runtime: PCM runtime instance
748 *
749 * Result is between 0 ... (boundary - 1)
1da177e4 750 */
877211f5 751static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 752{
753 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
754 if (avail < 0)
755 avail += runtime->boundary;
756 return avail;
757}
758
30b771cf
TI		 759/**
760 * snd_pcm_playback_hw_avail - Get the queued space for playback
761 * @runtime: PCM runtime instance
762 */
877211f5 763static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 764{
765 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
766}
767
30b771cf
TI		 768/**
769 * snd_pcm_capture_hw_avail - Get the free space for capture
770 * @runtime: PCM runtime instance
771 */
877211f5 772static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 773{
774 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
775}
776
777/**
778 * snd_pcm_playback_ready - check whether the playback buffer is available
779 * @substream: the pcm substream instance
780 *
781 * Checks whether enough free space is available on the playback buffer.
782 *
eb7c06e8 783 * Return: Non-zero if available, or zero if not.
1da177e4 784 */
877211f5 785static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
1da177e4 786{
877211f5 787 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 788 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
789}
790
791/**
792 * snd_pcm_capture_ready - check whether the capture buffer is available
793 * @substream: the pcm substream instance
794 *
795 * Checks whether enough capture data is available on the capture buffer.
796 *
eb7c06e8 797 * Return: Non-zero if available, or zero if not.
1da177e4 798 */
877211f5 799static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
1da177e4 800{
877211f5 801 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 802 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
803}
804
805/**
806 * snd_pcm_playback_data - check whether any data exists on the playback buffer
807 * @substream: the pcm substream instance
808 *
eb7c06e8 809 * Checks whether any data exists on the playback buffer.
1da177e4 810 *
eb7c06e8
YB		 811 * Return: Non-zero if any data exists, or zero if not. If stop_threshold
812 * is bigger or equal to boundary, then this function returns always non-zero.
1da177e4 813 */
877211f5 814static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
1da177e4 815{
877211f5 816 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 817
818 if (runtime->stop_threshold >= runtime->boundary)
819 return 1;
820 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
821}
822
823/**
824 * snd_pcm_playback_empty - check whether the playback buffer is empty
825 * @substream: the pcm substream instance
826 *
827 * Checks whether the playback buffer is empty.
828 *
eb7c06e8 829 * Return: Non-zero if empty, or zero if not.
1da177e4 830 */
877211f5 831static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
1da177e4 832{
877211f5 833 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 834 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
835}
836
837/**
838 * snd_pcm_capture_empty - check whether the capture buffer is empty
839 * @substream: the pcm substream instance
840 *
841 * Checks whether the capture buffer is empty.
842 *
eb7c06e8 843 * Return: Non-zero if empty, or zero if not.
1da177e4 844 */
877211f5 845static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
1da177e4 846{
877211f5 847 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 848 return snd_pcm_capture_avail(runtime) == 0;
849}
850
30b771cf
TI		 851/**
852 * snd_pcm_trigger_done - Mark the master substream
853 * @substream: the pcm substream instance
854 * @master: the linked master substream
855 *
856 * When multiple substreams of the same card are linked and the hardware
857 * supports the single-shot operation, the driver calls this in the loop
858 * in snd_pcm_group_for_each_entry() for marking the substream as "done".
859 * Then most of trigger operations are performed only to the given master
860 * substream.
861 *
862 * The trigger_master mark is cleared at timestamp updates at the end
863 * of trigger operations.
864 */
877211f5
TI		 865static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
866 struct snd_pcm_substream *master)
1da177e4
LT		 867{
868 substream->runtime->trigger_master = master;
869}
870
871static inline int hw_is_mask(int var)
872{
873 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
874 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
875}
876
877static inline int hw_is_interval(int var)
878{
879 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
880 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
881}
882
877211f5 883static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
1da177e4
LT		 884 snd_pcm_hw_param_t var)
885{
886 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
887}
888
877211f5 889static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
1da177e4
LT		 890 snd_pcm_hw_param_t var)
891{
892 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
893}
894
877211f5 895static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 896 snd_pcm_hw_param_t var)
897{
b9f09a48 898 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
1da177e4
LT		 899}
900
877211f5 901static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 902 snd_pcm_hw_param_t var)
903{
b9f09a48 904 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
1da177e4
LT		 905}
906
85926e0f
TI		 907/**
908 * params_channels - Get the number of channels from the hw params
909 * @p: hw params
910 */
911static inline unsigned int params_channels(const struct snd_pcm_hw_params *p)
912{
913 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min;
914}
915
916/**
62f64a88 917 * params_rate - Get the sample rate from the hw params
85926e0f
TI		 918 * @p: hw params
919 */
920static inline unsigned int params_rate(const struct snd_pcm_hw_params *p)
921{
922 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min;
923}
924
925/**
62f64a88 926 * params_period_size - Get the period size (in frames) from the hw params
85926e0f
TI		 927 * @p: hw params
928 */
929static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p)
930{
931 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min;
932}
933
934/**
62f64a88 935 * params_periods - Get the number of periods from the hw params
85926e0f
TI		 936 * @p: hw params
937 */
938static inline unsigned int params_periods(const struct snd_pcm_hw_params *p)
939{
940 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min;
941}
942
943/**
62f64a88 944 * params_buffer_size - Get the buffer size (in frames) from the hw params
85926e0f
TI		 945 * @p: hw params
946 */
947static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p)
948{
949 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min;
950}
951
952/**
62f64a88 953 * params_buffer_bytes - Get the buffer size (in bytes) from the hw params
85926e0f
TI		 954 * @p: hw params
955 */
956static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p)
957{
958 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min;
959}
1da177e4 960
877211f5
TI		 961int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
962void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
963void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
964void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
965 unsigned int k, struct snd_interval *c);
966void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
967 const struct snd_interval *b, struct snd_interval *c);
4af87a93
MB		 968int snd_interval_list(struct snd_interval *i, unsigned int count,
969 const unsigned int *list, unsigned int mask);
f66f898e
PR		 970int snd_interval_ranges(struct snd_interval *i, unsigned int count,
971 const struct snd_interval *list, unsigned int mask);
877211f5 972int snd_interval_ratnum(struct snd_interval *i,
e5e113cf 973 unsigned int rats_count, const struct snd_ratnum *rats,
1da177e4
LT		 974 unsigned int *nump, unsigned int *denp);
975
877211f5
TI		 976void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
977void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
877211f5 978int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 979
877211f5 980int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 981
877211f5
TI		 982int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
983int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
1da177e4 984
877211f5 985int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 986 u_int32_t mask);
877211f5 987int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 988 u_int64_t mask);
877211f5 989int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 990 unsigned int min, unsigned int max);
877211f5
TI		 991int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
992int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
1da177e4
LT		 993 unsigned int cond,
994 snd_pcm_hw_param_t var,
1464189f 995 const struct snd_pcm_hw_constraint_list *l);
f66f898e
PR		 996int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime,
997 unsigned int cond,
998 snd_pcm_hw_param_t var,
999 const struct snd_pcm_hw_constraint_ranges *r);
877211f5 1000int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1001 unsigned int cond,
1002 snd_pcm_hw_param_t var,
e5e113cf 1003 const struct snd_pcm_hw_constraint_ratnums *r);
877211f5 1004int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1005 unsigned int cond,
1006 snd_pcm_hw_param_t var,
e5e113cf 1007 const struct snd_pcm_hw_constraint_ratdens *r);
877211f5 1008int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1009 unsigned int cond,
1010 unsigned int width,
1011 unsigned int msbits);
877211f5 1012int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1013 unsigned int cond,
1014 snd_pcm_hw_param_t var,
1015 unsigned long step);
877211f5 1016int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1017 unsigned int cond,
1018 snd_pcm_hw_param_t var);
d5b702a6
CL		 1019int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime,
1020 unsigned int base_rate);
877211f5 1021int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1022 unsigned int cond,
1023 int var,
1024 snd_pcm_hw_rule_func_t func, void *private,
1025 int dep, ...);
1026
bc1043cd
LPC		 1027/**
1028 * snd_pcm_hw_constraint_single() - Constrain parameter to a single value
1029 * @runtime: PCM runtime instance
1030 * @var: The hw_params variable to constrain
1031 * @val: The value to constrain to
1032 *
1033 * Return: Positive if the value is changed, zero if it's not changed, or a
1034 * negative error code.
1035 */
1036static inline int snd_pcm_hw_constraint_single(
1037 struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1038 unsigned int val)
1039{
1040 return snd_pcm_hw_constraint_minmax(runtime, var, val, val);
1041}
1042
1da177e4
LT		 1043int snd_pcm_format_signed(snd_pcm_format_t format);
1044int snd_pcm_format_unsigned(snd_pcm_format_t format);
1045int snd_pcm_format_linear(snd_pcm_format_t format);
1046int snd_pcm_format_little_endian(snd_pcm_format_t format);
1047int snd_pcm_format_big_endian(snd_pcm_format_t format);
1b44c28d
TI		 1048#if 0 /* just for DocBook */
1049/**
9502dcad
TI		 1050 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
1051 * @format: the format to check
1052 *
eb7c06e8 1053 * Return: 1 if the given PCM format is CPU-endian, 0 if
9502dcad
TI		 1054 * opposite, or a negative error code if endian not specified.
1055 */
8cdfd251 1056int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1b44c28d 1057#endif /* DocBook */
9502dcad 1058#ifdef SNDRV_LITTLE_ENDIAN
9d01a82e 1059#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
9502dcad 1060#else
9d01a82e 1061#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
9502dcad 1062#endif
1da177e4
LT		 1063int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
1064int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
9502dcad 1065ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1da177e4
LT		 1066const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
1067int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
1da177e4 1068
e6c2e7eb
LPC		 1069void snd_pcm_set_ops(struct snd_pcm * pcm, int direction,
1070 const struct snd_pcm_ops *ops);
877211f5 1071void snd_pcm_set_sync(struct snd_pcm_substream *substream);
877211f5 1072int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
1da177e4 1073 unsigned int cmd, void *arg);
1250932e
JK		 1074int snd_pcm_update_state(struct snd_pcm_substream *substream,
1075 struct snd_pcm_runtime *runtime);
877211f5 1076int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
877211f5 1077void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
877211f5
TI		 1078void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
1079snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
1da177e4
LT		 1080 const void __user *buf,
1081 snd_pcm_uframes_t frames);
877211f5 1082snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
1da177e4 1083 void __user *buf, snd_pcm_uframes_t frames);
877211f5 1084snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
1da177e4 1085 void __user **bufs, snd_pcm_uframes_t frames);
877211f5 1086snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
1da177e4
LT		 1087 void __user **bufs, snd_pcm_uframes_t frames);
1088
7653d557
CL		 1089extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
1090
877211f5 1091int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
918f3a0e 1092unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
4be77a53 1093unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit);
e3a9269f
LPC		 1094unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a,
1095 unsigned int rates_b);
3bdff244
ML		 1096unsigned int snd_pcm_rate_range_to_bits(unsigned int rate_min,
1097 unsigned int rate_max);
1da177e4 1098
30b771cf
TI		 1099/**
1100 * snd_pcm_set_runtime_buffer - Set the PCM runtime buffer
1101 * @substream: PCM substream to set
1102 * @bufp: the buffer information, NULL to clear
1103 *
1104 * Copy the buffer information to runtime->dma_buffer when @bufp is non-NULL.
1105 * Otherwise it clears the current buffer information.
1106 */
877211f5 1107static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
1da177e4
LT		 1108 struct snd_dma_buffer *bufp)
1109{
877211f5 1110 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1111 if (bufp) {
1112 runtime->dma_buffer_p = bufp;
1113 runtime->dma_area = bufp->area;
1114 runtime->dma_addr = bufp->addr;
1115 runtime->dma_bytes = bufp->bytes;
1116 } else {
1117 runtime->dma_buffer_p = NULL;
1118 runtime->dma_area = NULL;
1119 runtime->dma_addr = 0;
1120 runtime->dma_bytes = 0;
1121 }
1122}
1123
1124/*
1125 * Timer interface
1126 */
1127
90bbaf66 1128#ifdef CONFIG_SND_PCM_TIMER
877211f5
TI		 1129void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
1130void snd_pcm_timer_init(struct snd_pcm_substream *substream);
1131void snd_pcm_timer_done(struct snd_pcm_substream *substream);
90bbaf66
JY		 1132#else
1133static inline void
1134snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}
1135static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}
1136static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}
1137#endif
30b771cf
TI		 1138/**
1139 * snd_pcm_gettime - Fill the timespec depending on the timestamp mode
1140 * @runtime: PCM runtime instance
1141 * @tv: timespec to fill
1142 */
b751eef1
JK		 1143static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
1144 struct timespec *tv)
1145{
0ac8a52d
MB		 1146 switch (runtime->tstamp_type) {
1147 case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC:
26204e04 1148 ktime_get_ts(tv);
0ac8a52d
MB		 1149 break;
1150 case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW:
1151 getrawmonotonic(tv);
1152 break;
1153 default:
b751eef1 1154 getnstimeofday(tv);
0ac8a52d
MB		 1155 break;
1156 }
b751eef1
JK		 1157}
1158
1da177e4
LT		 1159/*
1160 * Memory
1161 */
1162
877211f5
TI		 1163int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
1164int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
1165int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
1da177e4
LT		 1166 int type, struct device *data,
1167 size_t size, size_t max);
877211f5 1168int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
1da177e4
LT		 1169 int type, void *data,
1170 size_t size, size_t max);
877211f5
TI		 1171int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
1172int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
1da177e4 1173
681b84e1
CL		 1174int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
1175 size_t size, gfp_t gfp_flags);
1176int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
1177struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
1178 unsigned long offset);
681b84e1
CL		 1179/**
1180 * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
1181 * @substream: the substream to allocate the buffer to
1182 * @size: the requested buffer size, in bytes
1183 *
1184 * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is
1185 * contiguous in kernel virtual space, but not in physical memory. Use this
1186 * if the buffer is accessed by kernel code but not by device DMA.
1187 *
eb7c06e8 1188 * Return: 1 if the buffer was changed, 0 if not changed, or a negative error
681b84e1
CL		 1189 * code.
1190 */
f213d8f7
TI		 1191static inline int snd_pcm_lib_alloc_vmalloc_buffer
1192 (struct snd_pcm_substream *substream, size_t size)
1193{
1194 return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size,
1195 GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
1196}
1197
681b84e1
CL		 1198/**
1199 * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer
1200 * @substream: the substream to allocate the buffer to
1201 * @size: the requested buffer size, in bytes
1202 *
1203 * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses
1204 * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory.
eb7c06e8
YB		 1205 *
1206 * Return: 1 if the buffer was changed, 0 if not changed, or a negative error
1207 * code.
681b84e1 1208 */
f213d8f7
TI		 1209static inline int snd_pcm_lib_alloc_vmalloc_32_buffer
1210 (struct snd_pcm_substream *substream, size_t size)
1211{
1212 return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size,
1213 GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
1214}
681b84e1 1215
9d069dc0
TI		 1216#define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p)
1217
cc6a8acd 1218#ifdef CONFIG_SND_DMA_SGBUF
77a23f26
TI		 1219/*
1220 * SG-buffer handling
1221 */
1222#define snd_pcm_substream_sgbuf(substream) \
9d069dc0 1223 snd_pcm_get_dma_buf(substream)->private_data
77a23f26
TI		 1224
1225struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
1226 unsigned long offset);
cc6a8acd
TI		 1227#else /* !SND_DMA_SGBUF */
1228/*
1229 * fake using a continuous buffer
1230 */
9d069dc0
TI		 1231#define snd_pcm_sgbuf_ops_page NULL
1232#endif /* SND_DMA_SGBUF */
1233
30b771cf
TI		 1234/**
1235 * snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset
1236 * @substream: PCM substream
1237 * @ofs: byte offset
1238 */
cc6a8acd
TI		 1239static inline dma_addr_t
1240snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
1241{
9d069dc0 1242 return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs);
cc6a8acd
TI		 1243}
1244
30b771cf
TI		 1245/**
1246 * snd_pcm_sgbuf_get_ptr - Get the virtual address at the corresponding offset
1247 * @substream: PCM substream
1248 * @ofs: byte offset
1249 */
cc6a8acd
TI		 1250static inline void *
1251snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
1252{
9d069dc0 1253 return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs);
cc6a8acd
TI		 1254}
1255
30b771cf
TI		 1256/**
1257 * snd_pcm_sgbuf_chunk_size - Compute the max size that fits within the contig.
1258 * page from the given size
1259 * @substream: PCM substream
1260 * @ofs: byte offset
1261 * @size: byte size to examine
1262 */
9d069dc0
TI		 1263static inline unsigned int
1264snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
1265 unsigned int ofs, unsigned int size)
1266{
1267 return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size);
1268}
cc6a8acd 1269
30b771cf
TI		 1270/**
1271 * snd_pcm_mmap_data_open - increase the mmap counter
1272 * @area: VMA
1273 *
1274 * PCM mmap callback should handle this counter properly
1275 */
1da177e4
LT		 1276static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1277{
877211f5 1278 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 1279 atomic_inc(&substream->mmap_count);
1da177e4
LT		 1280}
1281
30b771cf
TI		 1282/**
1283 * snd_pcm_mmap_data_close - decrease the mmap counter
1284 * @area: VMA
1285 *
1286 * PCM mmap callback should handle this counter properly
1287 */
1da177e4
LT		 1288static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1289{
877211f5 1290 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 1291 atomic_dec(&substream->mmap_count);
1da177e4
LT		 1292}
1293
18a2b962
TI		 1294int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
1295 struct vm_area_struct *area);
1da177e4
LT		 1296/* mmap for io-memory area */
1297#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1298#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
877211f5 1299int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1da177e4
LT		 1300#else
1301#define SNDRV_PCM_INFO_MMAP_IOMEM 0
1302#define snd_pcm_lib_mmap_iomem NULL
1303#endif
1304
3674f19d 1305#define snd_pcm_lib_mmap_vmalloc NULL
c32d977b 1306
30b771cf
TI		 1307/**
1308 * snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer
1309 * @dma: DMA number
1310 * @max: pointer to store the max size
1311 */
1da177e4
LT		 1312static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1313{
1314 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1315}
1316
1317/*
1318 * Misc
1319 */
1320
1321#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1322 (IEC958_AES1_CON_ORIGINAL<<8)|\
1323 (IEC958_AES1_CON_PCM_CODER<<8)|\
1324 (IEC958_AES3_CON_FS_48000<<24))
1325
7eaa943c
TI		 1326#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1327
6e5265ec
TI		 1328const char *snd_pcm_format_name(snd_pcm_format_t format);
1329
1aad779f 1330/**
8513915a
RD		 1331 * snd_pcm_stream_str - Get a string naming the direction of a stream
1332 * @substream: the pcm substream instance
eb7c06e8
YB		 1333 *
1334 * Return: A string naming the direction of the stream.
1aad779f
OL		 1335 */
1336static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream)
1337{
1338 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1339 return "Playback";
1340 else
1341 return "Capture";
1342}
1343
2d3391ec
TI		 1344/*
1345 * PCM channel-mapping control API
1346 */
1347/* array element of channel maps */
1348struct snd_pcm_chmap_elem {
1349 unsigned char channels;
1350 unsigned char map[15];
1351};
1352
1353/* channel map information; retrieved via snd_kcontrol_chip() */
1354struct snd_pcm_chmap {
1355 struct snd_pcm *pcm; /* assigned PCM instance */
1356 int stream; /* PLAYBACK or CAPTURE */
1357 struct snd_kcontrol *kctl;
1358 const struct snd_pcm_chmap_elem *chmap;
1359 unsigned int max_channels;
1360 unsigned int channel_mask; /* optional: active channels bitmask */
1361 void *private_data; /* optional: private data pointer */
1362};
1363
30b771cf
TI		 1364/**
1365 * snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info
1366 * @info: chmap information
1367 * @idx: the substream number index
1368 */
2d3391ec
TI		 1369static inline struct snd_pcm_substream *
1370snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx)
1371{
1372 struct snd_pcm_substream *s;
1373 for (s = info->pcm->streams[info->stream].substream; s; s = s->next)
1374 if (s->number == idx)
1375 return s;
1376 return NULL;
1377}
1378
1379/* ALSA-standard channel maps (RL/RR prior to C/LFE) */
1380extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[];
1381/* Other world's standard channel maps (C/LFE prior to RL/RR) */
1382extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[];
1383
1384/* bit masks to be passed to snd_pcm_chmap.channel_mask field */
1385#define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4))
1386#define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6))
1387#define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8))
1388
1389int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream,
1390 const struct snd_pcm_chmap_elem *chmap,
1391 int max_channels,
1392 unsigned long private_value,
1393 struct snd_pcm_chmap **info_ret);
1394
30b771cf
TI		 1395/**
1396 * pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise
1397 * @pcm_format: PCM format
1398 */
74c34ca1
EZ		 1399static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format)
1400{
1401 return 1ULL << (__force int) pcm_format;
1402}
1403
09e56df8
TI		 1404/* printk helpers */
1405#define pcm_err(pcm, fmt, args...) \
1406 dev_err((pcm)->card->dev, fmt, ##args)
1407#define pcm_warn(pcm, fmt, args...) \
1408 dev_warn((pcm)->card->dev, fmt, ##args)
1409#define pcm_dbg(pcm, fmt, args...) \
1410 dev_dbg((pcm)->card->dev, fmt, ##args)
1411
1da177e4 1412#endif /* __SOUND_PCM_H */
Linux kernel - Deliverables
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