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[mirror_ubuntu-artful-kernel.git] / include / sound / pcm.h
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1da177e4
LT		 1#ifndef __SOUND_PCM_H
2#define __SOUND_PCM_H
3
4/*
5 * Digital Audio (PCM) abstract layer
c1017a4c 6 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 7 * Abramo Bagnara <abramo@alsa-project.org>
8 *
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25
26#include <sound/asound.h>
27#include <sound/memalloc.h>
f90c06a2 28#include <sound/minors.h>
1da177e4 29#include <linux/poll.h>
f23f6e08 30#include <linux/mm.h>
1da177e4 31#include <linux/bitops.h>
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;
877211f5
TI		 268 struct snd_ratnum *rats;
269};
1da177e4 270
877211f5 271struct snd_pcm_hw_constraint_ratdens {
1da177e4 272 int nrats;
877211f5
TI		 273 struct snd_ratden *rats;
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
4d96eb25
JK		 288struct snd_pcm_hwptr_log;
289
229d0430
PLB		 290/*
291 * userspace-provided audio timestamp config to kernel,
292 * structure is for internal use only and filled with dedicated unpack routine
293 */
294struct snd_pcm_audio_tstamp_config {
295 /* 5 of max 16 bits used */
296 u32 type_requested:4;
297 u32 report_delay:1; /* add total delay to A/D or D/A */
298};
299
300static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data,
301 struct snd_pcm_audio_tstamp_config *config)
302{
303 config->type_requested = data & 0xF;
304 config->report_delay = (data >> 4) & 1;
305}
306
307/*
308 * kernel-provided audio timestamp report to user-space
309 * structure is for internal use only and read by dedicated pack routine
310 */
311struct snd_pcm_audio_tstamp_report {
312 /* 6 of max 16 bits used for bit-fields */
313
314 /* for backwards compatibility */
315 u32 valid:1;
316
317 /* actual type if hardware could not support requested timestamp */
318 u32 actual_type:4;
319
320 /* accuracy represented in ns units */
321 u32 accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */
322 u32 accuracy; /* up to 4.29s, will be packed in separate field */
323};
324
325static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy,
326 const struct snd_pcm_audio_tstamp_report *report)
327{
328 u32 tmp;
329
330 tmp = report->accuracy_report;
331 tmp <<= 4;
332 tmp |= report->actual_type;
333 tmp <<= 1;
334 tmp |= report->valid;
335
336 *data &= 0xffff; /* zero-clear MSBs */
337 *data |= (tmp << 16);
338 *accuracy = report->accuracy;
339}
340
341
877211f5 342struct snd_pcm_runtime {
1da177e4 343 /* -- Status -- */
877211f5 344 struct snd_pcm_substream *trigger_master;
07799e75 345 struct timespec trigger_tstamp; /* trigger timestamp */
2b79d7a6 346 bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */
1da177e4
LT		 347 int overrange;
348 snd_pcm_uframes_t avail_max;
349 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
e7636925 350 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
bbf6ad13 351 unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
bd76af0f 352 unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */
4bbe1ddf 353 snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */
0e8014d7 354 u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */
1da177e4
LT		 355
356 /* -- HW params -- */
357 snd_pcm_access_t access; /* access mode */
358 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
359 snd_pcm_subformat_t subformat; /* subformat */
360 unsigned int rate; /* rate in Hz */
361 unsigned int channels; /* channels */
362 snd_pcm_uframes_t period_size; /* period size */
363 unsigned int periods; /* periods */
364 snd_pcm_uframes_t buffer_size; /* buffer size */
1da177e4
LT		 365 snd_pcm_uframes_t min_align; /* Min alignment for the format */
366 size_t byte_align;
367 unsigned int frame_bits;
368 unsigned int sample_bits;
369 unsigned int info;
370 unsigned int rate_num;
371 unsigned int rate_den;
ab69a490 372 unsigned int no_period_wakeup: 1;
1da177e4
LT		 373
374 /* -- SW params -- */
877211f5 375 int tstamp_mode; /* mmap timestamp is updated */
1da177e4 376 unsigned int period_step;
1da177e4
LT		 377 snd_pcm_uframes_t start_threshold;
378 snd_pcm_uframes_t stop_threshold;
379 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
380 noise is nearest than this */
381 snd_pcm_uframes_t silence_size; /* Silence filling size */
382 snd_pcm_uframes_t boundary; /* pointers wrap point */
383
384 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
385 snd_pcm_uframes_t silence_filled; /* size filled with silence */
386
877211f5 387 union snd_pcm_sync_id sync; /* hardware synchronization ID */
1da177e4
LT		 388
389 /* -- mmap -- */
503fc85a
TI		 390 struct snd_pcm_mmap_status *status;
391 struct snd_pcm_mmap_control *control;
1da177e4
LT		 392
393 /* -- locking / scheduling -- */
5daeba34 394 snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */
c91a988d
JK		 395 wait_queue_head_t sleep; /* poll sleep */
396 wait_queue_head_t tsleep; /* transfer sleep */
1da177e4
LT		 397 struct fasync_struct *fasync;
398
399 /* -- private section -- */
400 void *private_data;
877211f5 401 void (*private_free)(struct snd_pcm_runtime *runtime);
1da177e4
LT		 402
403 /* -- hardware description -- */
877211f5
TI		 404 struct snd_pcm_hardware hw;
405 struct snd_pcm_hw_constraints hw_constraints;
1da177e4
LT		 406
407 /* -- interrupt callbacks -- */
877211f5
TI		 408 void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
409 void (*transfer_ack_end)(struct snd_pcm_substream *substream);
1da177e4
LT		 410
411 /* -- timer -- */
412 unsigned int timer_resolution; /* timer resolution */
b751eef1 413 int tstamp_type; /* timestamp type */
1da177e4
LT		 414
415 /* -- DMA -- */
416 unsigned char *dma_area; /* DMA area */
417 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
418 size_t dma_bytes; /* size of DMA area */
419
420 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
421
229d0430
PLB		 422 /* -- audio timestamp config -- */
423 struct snd_pcm_audio_tstamp_config audio_tstamp_config;
424 struct snd_pcm_audio_tstamp_report audio_tstamp_report;
425 struct timespec driver_tstamp;
426
1da177e4
LT		 427#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
428 /* -- OSS things -- */
877211f5 429 struct snd_pcm_oss_runtime oss;
1da177e4 430#endif
4d96eb25
JK		 431
432#ifdef CONFIG_SND_PCM_XRUN_DEBUG
433 struct snd_pcm_hwptr_log *hwptr_log;
434#endif
1da177e4
LT		 435};
436
877211f5 437struct snd_pcm_group { /* keep linked substreams */
1da177e4 438 spinlock_t lock;
257f8cce 439 struct mutex mutex;
1da177e4
LT		 440 struct list_head substreams;
441 int count;
877211f5 442};
1da177e4 443
e7373b70
CL		 444struct pid;
445
877211f5
TI		 446struct snd_pcm_substream {
447 struct snd_pcm *pcm;
448 struct snd_pcm_str *pstr;
1da177e4
LT		 449 void *private_data; /* copied from pcm->private_data */
450 int number;
451 char name[32]; /* substream name */
452 int stream; /* stream (direction) */
cc749986 453 struct pm_qos_request latency_pm_qos_req; /* pm_qos request */
1da177e4
LT		 454 size_t buffer_bytes_max; /* limit ring buffer size */
455 struct snd_dma_buffer dma_buffer;
1da177e4
LT		 456 size_t dma_max;
457 /* -- hardware operations -- */
e6c2e7eb 458 const struct snd_pcm_ops *ops;
1da177e4 459 /* -- runtime information -- */
877211f5 460 struct snd_pcm_runtime *runtime;
1da177e4 461 /* -- timer section -- */
877211f5 462 struct snd_timer *timer; /* timer */
1da177e4 463 unsigned timer_running: 1; /* time is running */
1da177e4 464 /* -- next substream -- */
877211f5 465 struct snd_pcm_substream *next;
1da177e4
LT		 466 /* -- linked substreams -- */
467 struct list_head link_list; /* linked list member */
877211f5
TI		 468 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
469 struct snd_pcm_group *group; /* pointer to current group */
1da177e4 470 /* -- assigned files -- */
1576274d 471 void *file;
0df63e44 472 int ref_count;
9c323fcb 473 atomic_t mmap_count;
0df63e44 474 unsigned int f_flags;
3bf75f9b 475 void (*pcm_release)(struct snd_pcm_substream *);
e7373b70 476 struct pid *pid;
1da177e4
LT		 477#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
478 /* -- OSS things -- */
877211f5 479 struct snd_pcm_oss_substream oss;
1da177e4 480#endif
b7d90a35 481#ifdef CONFIG_SND_VERBOSE_PROCFS
877211f5
TI		 482 struct snd_info_entry *proc_root;
483 struct snd_info_entry *proc_info_entry;
484 struct snd_info_entry *proc_hw_params_entry;
485 struct snd_info_entry *proc_sw_params_entry;
486 struct snd_info_entry *proc_status_entry;
487 struct snd_info_entry *proc_prealloc_entry;
c7132aeb 488 struct snd_info_entry *proc_prealloc_max_entry;
2b30d411
TI		 489#ifdef CONFIG_SND_PCM_XRUN_DEBUG
490 struct snd_info_entry *proc_xrun_injection_entry;
b7d90a35 491#endif
2b30d411 492#endif /* CONFIG_SND_VERBOSE_PROCFS */
1da177e4 493 /* misc flags */
3bf75f9b 494 unsigned int hw_opened: 1;
1da177e4
LT		 495};
496
0df63e44 497#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
1da177e4
LT		 498
499
877211f5 500struct snd_pcm_str {
1da177e4 501 int stream; /* stream (direction) */
877211f5 502 struct snd_pcm *pcm;
1da177e4
LT		 503 /* -- substreams -- */
504 unsigned int substream_count;
505 unsigned int substream_opened;
877211f5 506 struct snd_pcm_substream *substream;
1da177e4
LT		 507#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
508 /* -- OSS things -- */
877211f5 509 struct snd_pcm_oss_stream oss;
1da177e4 510#endif
b7d90a35 511#ifdef CONFIG_SND_VERBOSE_PROCFS
877211f5
TI		 512 struct snd_info_entry *proc_root;
513 struct snd_info_entry *proc_info_entry;
b7d90a35 514#ifdef CONFIG_SND_PCM_XRUN_DEBUG
1da177e4 515 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
877211f5 516 struct snd_info_entry *proc_xrun_debug_entry;
1da177e4 517#endif
b7d90a35 518#endif
2d3391ec 519 struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */
ef46c7af 520 struct device dev;
1da177e4
LT		 521};
522
877211f5
TI		 523struct snd_pcm {
524 struct snd_card *card;
f87135f5 525 struct list_head list;
f90c06a2 526 int device; /* device number */
1da177e4
LT		 527 unsigned int info_flags;
528 unsigned short dev_class;
529 unsigned short dev_subclass;
530 char id[64];
531 char name[80];
877211f5 532 struct snd_pcm_str streams[2];
1a60d4c5 533 struct mutex open_mutex;
1da177e4
LT		 534 wait_queue_head_t open_wait;
535 void *private_data;
877211f5 536 void (*private_free) (struct snd_pcm *pcm);
945e5038 537 bool internal; /* pcm is for internal use only */
257f8cce 538 bool nonatomic; /* whole PCM operations are in non-atomic context */
1da177e4 539#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
877211f5 540 struct snd_pcm_oss oss;
1da177e4
LT		 541#endif
542};
543
877211f5
TI		 544struct snd_pcm_notify {
545 int (*n_register) (struct snd_pcm * pcm);
546 int (*n_disconnect) (struct snd_pcm * pcm);
547 int (*n_unregister) (struct snd_pcm * pcm);
1da177e4 548 struct list_head list;
877211f5 549};
1da177e4
LT		 550
551/*
552 * Registering
553 */
554
54047320 555extern const struct file_operations snd_pcm_f_ops[2];
1da177e4 556
e6161653 557int snd_pcm_new(struct snd_card *card, const char *id, int device,
1da177e4 558 int playback_count, int capture_count,
877211f5 559 struct snd_pcm **rpcm);
945e5038
LG		 560int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
561 int playback_count, int capture_count,
562 struct snd_pcm **rpcm);
877211f5 563int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
1da177e4 564
877211f5 565int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
1da177e4
LT		 566
567/*
568 * Native I/O
569 */
570
877211f5
TI		 571int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
572int snd_pcm_info_user(struct snd_pcm_substream *substream,
573 struct snd_pcm_info __user *info);
574int snd_pcm_status(struct snd_pcm_substream *substream,
575 struct snd_pcm_status *status);
877211f5 576int snd_pcm_start(struct snd_pcm_substream *substream);
fea952e5 577int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status);
877211f5 578int snd_pcm_drain_done(struct snd_pcm_substream *substream);
1fb8510c 579int snd_pcm_stop_xrun(struct snd_pcm_substream *substream);
1da177e4 580#ifdef CONFIG_PM
877211f5
TI		 581int snd_pcm_suspend(struct snd_pcm_substream *substream);
582int snd_pcm_suspend_all(struct snd_pcm *pcm);
1da177e4 583#endif
877211f5 584int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
3bf75f9b
TI		 585int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
586 struct snd_pcm_substream **rsubstream);
877211f5 587void snd_pcm_release_substream(struct snd_pcm_substream *substream);
3bf75f9b
TI		 588int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
589 struct snd_pcm_substream **rsubstream);
590void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
877211f5 591int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
1da177e4 592
acb03d44
EB		 593
594#ifdef CONFIG_SND_DEBUG
595void snd_pcm_debug_name(struct snd_pcm_substream *substream,
596 char *name, size_t len);
597#else
598static inline void
599snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size)
600{
601 *buf = 0;
602}
603#endif
604
1da177e4
LT		 605/*
606 * PCM library
607 */
608
30b771cf
TI		 609/**
610 * snd_pcm_stream_linked - Check whether the substream is linked with others
611 * @substream: substream to check
612 *
613 * Returns true if the given substream is being linked with others.
614 */
877211f5 615static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
1da177e4
LT		 616{
617 return substream->group != &substream->self_group;
618}
619
7af142f7
TI		 620void snd_pcm_stream_lock(struct snd_pcm_substream *substream);
621void snd_pcm_stream_unlock(struct snd_pcm_substream *substream);
622void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream);
623void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream);
624unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream);
30b771cf
TI		 625
626/**
627 * snd_pcm_stream_lock_irqsave - Lock the PCM stream
628 * @substream: PCM substream
629 * @flags: irq flags
630 *
631 * This locks the PCM stream like snd_pcm_stream_lock() but with the local
632 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
633 * as snd_pcm_stream_lock().
634 */
7af142f7
TI		 635#define snd_pcm_stream_lock_irqsave(substream, flags) \
636 do { \
637 typecheck(unsigned long, flags); \
638 flags = _snd_pcm_stream_lock_irqsave(substream); \
639 } while (0)
640void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
641 unsigned long flags);
1da177e4 642
30b771cf
TI		 643/**
644 * snd_pcm_group_for_each_entry - iterate over the linked substreams
645 * @s: the iterator
646 * @substream: the substream
647 *
648 * Iterate over the all linked substreams to the given @substream.
649 * When @substream isn't linked with any others, this gives returns @substream
650 * itself once.
651 */
ef991b95
TI		 652#define snd_pcm_group_for_each_entry(s, substream) \
653 list_for_each_entry(s, &substream->group->substreams, link_list)
1da177e4 654
30b771cf
TI		 655/**
656 * snd_pcm_running - Check whether the substream is in a running state
657 * @substream: substream to check
658 *
659 * Returns true if the given substream is in the state RUNNING, or in the
660 * state DRAINING for playback.
661 */
877211f5 662static inline int snd_pcm_running(struct snd_pcm_substream *substream)
1da177e4
LT		 663{
664 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
665 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
666 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
667}
668
30b771cf
TI		 669/**
670 * bytes_to_samples - Unit conversion of the size from bytes to samples
671 * @runtime: PCM runtime instance
672 * @size: size in bytes
673 */
877211f5 674static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 675{
676 return size * 8 / runtime->sample_bits;
677}
678
30b771cf
TI		 679/**
680 * bytes_to_frames - Unit conversion of the size from bytes to frames
681 * @runtime: PCM runtime instance
682 * @size: size in bytes
683 */
877211f5 684static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 685{
686 return size * 8 / runtime->frame_bits;
687}
688
30b771cf
TI		 689/**
690 * samples_to_bytes - Unit conversion of the size from samples to bytes
691 * @runtime: PCM runtime instance
692 * @size: size in samples
693 */
877211f5 694static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 695{
696 return size * runtime->sample_bits / 8;
697}
698
30b771cf
TI		 699/**
700 * frames_to_bytes - Unit conversion of the size from frames to bytes
701 * @runtime: PCM runtime instance
702 * @size: size in frames
703 */
877211f5 704static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
1da177e4
LT		 705{
706 return size * runtime->frame_bits / 8;
707}
708
30b771cf
TI		 709/**
710 * frame_aligned - Check whether the byte size is aligned to frames
711 * @runtime: PCM runtime instance
712 * @bytes: size in bytes
713 */
877211f5 714static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
1da177e4
LT		 715{
716 return bytes % runtime->byte_align == 0;
717}
718
30b771cf
TI		 719/**
720 * snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes
721 * @substream: PCM substream
722 */
877211f5 723static inline size_t snd_pcm_lib_buffer_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->buffer_size);
727}
728
30b771cf
TI		 729/**
730 * snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes
731 * @substream: PCM substream
732 */
877211f5 733static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
1da177e4 734{
877211f5 735 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 736 return frames_to_bytes(runtime, runtime->period_size);
737}
738
30b771cf
TI		 739/**
740 * snd_pcm_playback_avail - Get the available (writable) space for playback
741 * @runtime: PCM runtime instance
742 *
743 * Result is between 0 ... (boundary - 1)
1da177e4 744 */
877211f5 745static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 746{
747 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
748 if (avail < 0)
749 avail += runtime->boundary;
750 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
751 avail -= runtime->boundary;
752 return avail;
753}
754
30b771cf
TI		 755/**
756 * snd_pcm_playback_avail - Get the available (readable) space for capture
757 * @runtime: PCM runtime instance
758 *
759 * Result is between 0 ... (boundary - 1)
1da177e4 760 */
877211f5 761static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 762{
763 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
764 if (avail < 0)
765 avail += runtime->boundary;
766 return avail;
767}
768
30b771cf
TI		 769/**
770 * snd_pcm_playback_hw_avail - Get the queued space for playback
771 * @runtime: PCM runtime instance
772 */
877211f5 773static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 774{
775 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
776}
777
30b771cf
TI		 778/**
779 * snd_pcm_capture_hw_avail - Get the free space for capture
780 * @runtime: PCM runtime instance
781 */
877211f5 782static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 783{
784 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
785}
786
787/**
788 * snd_pcm_playback_ready - check whether the playback buffer is available
789 * @substream: the pcm substream instance
790 *
791 * Checks whether enough free space is available on the playback buffer.
792 *
eb7c06e8 793 * Return: Non-zero if available, or zero if not.
1da177e4 794 */
877211f5 795static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
1da177e4 796{
877211f5 797 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 798 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
799}
800
801/**
802 * snd_pcm_capture_ready - check whether the capture buffer is available
803 * @substream: the pcm substream instance
804 *
805 * Checks whether enough capture data is available on the capture buffer.
806 *
eb7c06e8 807 * Return: Non-zero if available, or zero if not.
1da177e4 808 */
877211f5 809static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
1da177e4 810{
877211f5 811 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 812 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
813}
814
815/**
816 * snd_pcm_playback_data - check whether any data exists on the playback buffer
817 * @substream: the pcm substream instance
818 *
eb7c06e8 819 * Checks whether any data exists on the playback buffer.
1da177e4 820 *
eb7c06e8
YB		 821 * Return: Non-zero if any data exists, or zero if not. If stop_threshold
822 * is bigger or equal to boundary, then this function returns always non-zero.
1da177e4 823 */
877211f5 824static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
1da177e4 825{
877211f5 826 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 827
828 if (runtime->stop_threshold >= runtime->boundary)
829 return 1;
830 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
831}
832
833/**
834 * snd_pcm_playback_empty - check whether the playback buffer is empty
835 * @substream: the pcm substream instance
836 *
837 * Checks whether the playback buffer is empty.
838 *
eb7c06e8 839 * Return: Non-zero if empty, or zero if not.
1da177e4 840 */
877211f5 841static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
1da177e4 842{
877211f5 843 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 844 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
845}
846
847/**
848 * snd_pcm_capture_empty - check whether the capture buffer is empty
849 * @substream: the pcm substream instance
850 *
851 * Checks whether the capture buffer is empty.
852 *
eb7c06e8 853 * Return: Non-zero if empty, or zero if not.
1da177e4 854 */
877211f5 855static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
1da177e4 856{
877211f5 857 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 858 return snd_pcm_capture_avail(runtime) == 0;
859}
860
30b771cf
TI		 861/**
862 * snd_pcm_trigger_done - Mark the master substream
863 * @substream: the pcm substream instance
864 * @master: the linked master substream
865 *
866 * When multiple substreams of the same card are linked and the hardware
867 * supports the single-shot operation, the driver calls this in the loop
868 * in snd_pcm_group_for_each_entry() for marking the substream as "done".
869 * Then most of trigger operations are performed only to the given master
870 * substream.
871 *
872 * The trigger_master mark is cleared at timestamp updates at the end
873 * of trigger operations.
874 */
877211f5
TI		 875static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
876 struct snd_pcm_substream *master)
1da177e4
LT		 877{
878 substream->runtime->trigger_master = master;
879}
880
881static inline int hw_is_mask(int var)
882{
883 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
884 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
885}
886
887static inline int hw_is_interval(int var)
888{
889 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
890 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
891}
892
877211f5 893static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
1da177e4
LT		 894 snd_pcm_hw_param_t var)
895{
896 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
897}
898
877211f5 899static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
1da177e4
LT		 900 snd_pcm_hw_param_t var)
901{
902 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
903}
904
877211f5 905static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 906 snd_pcm_hw_param_t var)
907{
b9f09a48 908 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
1da177e4
LT		 909}
910
877211f5 911static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 912 snd_pcm_hw_param_t var)
913{
b9f09a48 914 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
1da177e4
LT		 915}
916
85926e0f
TI		 917/**
918 * params_channels - Get the number of channels from the hw params
919 * @p: hw params
920 */
921static inline unsigned int params_channels(const struct snd_pcm_hw_params *p)
922{
923 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min;
924}
925
926/**
62f64a88 927 * params_rate - Get the sample rate from the hw params
85926e0f
TI		 928 * @p: hw params
929 */
930static inline unsigned int params_rate(const struct snd_pcm_hw_params *p)
931{
932 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min;
933}
934
935/**
62f64a88 936 * params_period_size - Get the period size (in frames) from the hw params
85926e0f
TI		 937 * @p: hw params
938 */
939static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p)
940{
941 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min;
942}
943
944/**
62f64a88 945 * params_periods - Get the number of periods from the hw params
85926e0f
TI		 946 * @p: hw params
947 */
948static inline unsigned int params_periods(const struct snd_pcm_hw_params *p)
949{
950 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min;
951}
952
953/**
62f64a88 954 * params_buffer_size - Get the buffer size (in frames) from the hw params
85926e0f
TI		 955 * @p: hw params
956 */
957static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p)
958{
959 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min;
960}
961
962/**
62f64a88 963 * params_buffer_bytes - Get the buffer size (in bytes) from the hw params
85926e0f
TI		 964 * @p: hw params
965 */
966static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p)
967{
968 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min;
969}
1da177e4 970
877211f5
TI		 971int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
972void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
973void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
974void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
975 unsigned int k, struct snd_interval *c);
976void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
977 const struct snd_interval *b, struct snd_interval *c);
4af87a93
MB		 978int snd_interval_list(struct snd_interval *i, unsigned int count,
979 const unsigned int *list, unsigned int mask);
f66f898e
PR		 980int snd_interval_ranges(struct snd_interval *i, unsigned int count,
981 const struct snd_interval *list, unsigned int mask);
877211f5
TI		 982int snd_interval_ratnum(struct snd_interval *i,
983 unsigned int rats_count, struct snd_ratnum *rats,
1da177e4
LT		 984 unsigned int *nump, unsigned int *denp);
985
877211f5
TI		 986void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
987void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
877211f5 988int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 989
877211f5 990int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 991
877211f5
TI		 992int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
993int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
1da177e4 994
877211f5 995int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 996 u_int32_t mask);
877211f5 997int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 998 u_int64_t mask);
877211f5 999int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 1000 unsigned int min, unsigned int max);
877211f5
TI		 1001int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
1002int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1003 unsigned int cond,
1004 snd_pcm_hw_param_t var,
1464189f 1005 const struct snd_pcm_hw_constraint_list *l);
f66f898e
PR		 1006int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime,
1007 unsigned int cond,
1008 snd_pcm_hw_param_t var,
1009 const struct snd_pcm_hw_constraint_ranges *r);
877211f5 1010int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1011 unsigned int cond,
1012 snd_pcm_hw_param_t var,
877211f5
TI		 1013 struct snd_pcm_hw_constraint_ratnums *r);
1014int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1015 unsigned int cond,
1016 snd_pcm_hw_param_t var,
877211f5
TI		 1017 struct snd_pcm_hw_constraint_ratdens *r);
1018int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1019 unsigned int cond,
1020 unsigned int width,
1021 unsigned int msbits);
877211f5 1022int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1023 unsigned int cond,
1024 snd_pcm_hw_param_t var,
1025 unsigned long step);
877211f5 1026int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1027 unsigned int cond,
1028 snd_pcm_hw_param_t var);
d5b702a6
CL		 1029int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime,
1030 unsigned int base_rate);
877211f5 1031int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
1da177e4
LT		 1032 unsigned int cond,
1033 int var,
1034 snd_pcm_hw_rule_func_t func, void *private,
1035 int dep, ...);
1036
1037int snd_pcm_format_signed(snd_pcm_format_t format);
1038int snd_pcm_format_unsigned(snd_pcm_format_t format);
1039int snd_pcm_format_linear(snd_pcm_format_t format);
1040int snd_pcm_format_little_endian(snd_pcm_format_t format);
1041int snd_pcm_format_big_endian(snd_pcm_format_t format);
1b44c28d
TI		 1042#if 0 /* just for DocBook */
1043/**
9502dcad
TI		 1044 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
1045 * @format: the format to check
1046 *
eb7c06e8 1047 * Return: 1 if the given PCM format is CPU-endian, 0 if
9502dcad
TI		 1048 * opposite, or a negative error code if endian not specified.
1049 */
8cdfd251 1050int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1b44c28d 1051#endif /* DocBook */
9502dcad 1052#ifdef SNDRV_LITTLE_ENDIAN
9d01a82e 1053#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
9502dcad 1054#else
9d01a82e 1055#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
9502dcad 1056#endif
1da177e4
LT		 1057int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
1058int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
9502dcad 1059ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1da177e4
LT		 1060const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
1061int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
1da177e4 1062
e6c2e7eb
LPC		 1063void snd_pcm_set_ops(struct snd_pcm * pcm, int direction,
1064 const struct snd_pcm_ops *ops);
877211f5 1065void snd_pcm_set_sync(struct snd_pcm_substream *substream);
877211f5 1066int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
1da177e4 1067 unsigned int cmd, void *arg);
1250932e
JK		 1068int snd_pcm_update_state(struct snd_pcm_substream *substream,
1069 struct snd_pcm_runtime *runtime);
877211f5 1070int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
877211f5 1071void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
877211f5
TI		 1072void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
1073snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
1da177e4
LT		 1074 const void __user *buf,
1075 snd_pcm_uframes_t frames);
877211f5 1076snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
1da177e4 1077 void __user *buf, snd_pcm_uframes_t frames);
877211f5 1078snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
1da177e4 1079 void __user **bufs, snd_pcm_uframes_t frames);
877211f5 1080snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
1da177e4
LT		 1081 void __user **bufs, snd_pcm_uframes_t frames);
1082
7653d557
CL		 1083extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
1084
877211f5 1085int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
918f3a0e 1086unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
4be77a53 1087unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit);
e3a9269f
LPC		 1088unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a,
1089 unsigned int rates_b);
1da177e4 1090
30b771cf
TI		 1091/**
1092 * snd_pcm_set_runtime_buffer - Set the PCM runtime buffer
1093 * @substream: PCM substream to set
1094 * @bufp: the buffer information, NULL to clear
1095 *
1096 * Copy the buffer information to runtime->dma_buffer when @bufp is non-NULL.
1097 * Otherwise it clears the current buffer information.
1098 */
877211f5 1099static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
1da177e4
LT		 1100 struct snd_dma_buffer *bufp)
1101{
877211f5 1102 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1103 if (bufp) {
1104 runtime->dma_buffer_p = bufp;
1105 runtime->dma_area = bufp->area;
1106 runtime->dma_addr = bufp->addr;
1107 runtime->dma_bytes = bufp->bytes;
1108 } else {
1109 runtime->dma_buffer_p = NULL;
1110 runtime->dma_area = NULL;
1111 runtime->dma_addr = 0;
1112 runtime->dma_bytes = 0;
1113 }
1114}
1115
1116/*
1117 * Timer interface
1118 */
1119
877211f5
TI		 1120void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
1121void snd_pcm_timer_init(struct snd_pcm_substream *substream);
1122void snd_pcm_timer_done(struct snd_pcm_substream *substream);
1da177e4 1123
30b771cf
TI		 1124/**
1125 * snd_pcm_gettime - Fill the timespec depending on the timestamp mode
1126 * @runtime: PCM runtime instance
1127 * @tv: timespec to fill
1128 */
b751eef1
JK		 1129static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
1130 struct timespec *tv)
1131{
0ac8a52d
MB		 1132 switch (runtime->tstamp_type) {
1133 case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC:
26204e04 1134 ktime_get_ts(tv);
0ac8a52d
MB		 1135 break;
1136 case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW:
1137 getrawmonotonic(tv);
1138 break;
1139 default:
b751eef1 1140 getnstimeofday(tv);
0ac8a52d
MB		 1141 break;
1142 }
b751eef1
JK		 1143}
1144
1da177e4
LT		 1145/*
1146 * Memory
1147 */
1148
877211f5
TI		 1149int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
1150int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
1151int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
1da177e4
LT		 1152 int type, struct device *data,
1153 size_t size, size_t max);
877211f5 1154int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
1da177e4
LT		 1155 int type, void *data,
1156 size_t size, size_t max);
877211f5
TI		 1157int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
1158int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
1da177e4 1159
681b84e1
CL		 1160int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
1161 size_t size, gfp_t gfp_flags);
1162int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
1163struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
1164 unsigned long offset);
681b84e1
CL		 1165/**
1166 * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
1167 * @substream: the substream to allocate the buffer to
1168 * @size: the requested buffer size, in bytes
1169 *
1170 * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is
1171 * contiguous in kernel virtual space, but not in physical memory. Use this
1172 * if the buffer is accessed by kernel code but not by device DMA.
1173 *
eb7c06e8 1174 * Return: 1 if the buffer was changed, 0 if not changed, or a negative error
681b84e1
CL		 1175 * code.
1176 */
f213d8f7
TI		 1177static inline int snd_pcm_lib_alloc_vmalloc_buffer
1178 (struct snd_pcm_substream *substream, size_t size)
1179{
1180 return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size,
1181 GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
1182}
1183
681b84e1
CL		 1184/**
1185 * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer
1186 * @substream: the substream to allocate the buffer to
1187 * @size: the requested buffer size, in bytes
1188 *
1189 * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses
1190 * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory.
eb7c06e8
YB		 1191 *
1192 * Return: 1 if the buffer was changed, 0 if not changed, or a negative error
1193 * code.
681b84e1 1194 */
f213d8f7
TI		 1195static inline int snd_pcm_lib_alloc_vmalloc_32_buffer
1196 (struct snd_pcm_substream *substream, size_t size)
1197{
1198 return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size,
1199 GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
1200}
681b84e1 1201
9d069dc0
TI		 1202#define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p)
1203
cc6a8acd 1204#ifdef CONFIG_SND_DMA_SGBUF
77a23f26
TI		 1205/*
1206 * SG-buffer handling
1207 */
1208#define snd_pcm_substream_sgbuf(substream) \
9d069dc0 1209 snd_pcm_get_dma_buf(substream)->private_data
77a23f26
TI		 1210
1211struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
1212 unsigned long offset);
cc6a8acd
TI		 1213#else /* !SND_DMA_SGBUF */
1214/*
1215 * fake using a continuous buffer
1216 */
9d069dc0
TI		 1217#define snd_pcm_sgbuf_ops_page NULL
1218#endif /* SND_DMA_SGBUF */
1219
30b771cf
TI		 1220/**
1221 * snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset
1222 * @substream: PCM substream
1223 * @ofs: byte offset
1224 */
cc6a8acd
TI		 1225static inline dma_addr_t
1226snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
1227{
9d069dc0 1228 return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs);
cc6a8acd
TI		 1229}
1230
30b771cf
TI		 1231/**
1232 * snd_pcm_sgbuf_get_ptr - Get the virtual address at the corresponding offset
1233 * @substream: PCM substream
1234 * @ofs: byte offset
1235 */
cc6a8acd
TI		 1236static inline void *
1237snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
1238{
9d069dc0 1239 return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs);
cc6a8acd
TI		 1240}
1241
30b771cf
TI		 1242/**
1243 * snd_pcm_sgbuf_chunk_size - Compute the max size that fits within the contig.
1244 * page from the given size
1245 * @substream: PCM substream
1246 * @ofs: byte offset
1247 * @size: byte size to examine
1248 */
9d069dc0
TI		 1249static inline unsigned int
1250snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
1251 unsigned int ofs, unsigned int size)
1252{
1253 return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size);
1254}
cc6a8acd 1255
30b771cf
TI		 1256/**
1257 * snd_pcm_mmap_data_open - increase the mmap counter
1258 * @area: VMA
1259 *
1260 * PCM mmap callback should handle this counter properly
1261 */
1da177e4
LT		 1262static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1263{
877211f5 1264 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 1265 atomic_inc(&substream->mmap_count);
1da177e4
LT		 1266}
1267
30b771cf
TI		 1268/**
1269 * snd_pcm_mmap_data_close - decrease the mmap counter
1270 * @area: VMA
1271 *
1272 * PCM mmap callback should handle this counter properly
1273 */
1da177e4
LT		 1274static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1275{
877211f5 1276 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 1277 atomic_dec(&substream->mmap_count);
1da177e4
LT		 1278}
1279
18a2b962
TI		 1280int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
1281 struct vm_area_struct *area);
1da177e4
LT		 1282/* mmap for io-memory area */
1283#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1284#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
877211f5 1285int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1da177e4
LT		 1286#else
1287#define SNDRV_PCM_INFO_MMAP_IOMEM 0
1288#define snd_pcm_lib_mmap_iomem NULL
1289#endif
1290
3674f19d 1291#define snd_pcm_lib_mmap_vmalloc NULL
c32d977b 1292
30b771cf
TI		 1293/**
1294 * snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer
1295 * @dma: DMA number
1296 * @max: pointer to store the max size
1297 */
1da177e4
LT		 1298static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1299{
1300 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1301}
1302
1303/*
1304 * Misc
1305 */
1306
1307#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1308 (IEC958_AES1_CON_ORIGINAL<<8)|\
1309 (IEC958_AES1_CON_PCM_CODER<<8)|\
1310 (IEC958_AES3_CON_FS_48000<<24))
1311
7eaa943c
TI		 1312#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1313
6e5265ec
TI		 1314const char *snd_pcm_format_name(snd_pcm_format_t format);
1315
1aad779f 1316/**
8513915a
RD		 1317 * snd_pcm_stream_str - Get a string naming the direction of a stream
1318 * @substream: the pcm substream instance
eb7c06e8
YB		 1319 *
1320 * Return: A string naming the direction of the stream.
1aad779f
OL		 1321 */
1322static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream)
1323{
1324 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1325 return "Playback";
1326 else
1327 return "Capture";
1328}
1329
2d3391ec
TI		 1330/*
1331 * PCM channel-mapping control API
1332 */
1333/* array element of channel maps */
1334struct snd_pcm_chmap_elem {
1335 unsigned char channels;
1336 unsigned char map[15];
1337};
1338
1339/* channel map information; retrieved via snd_kcontrol_chip() */
1340struct snd_pcm_chmap {
1341 struct snd_pcm *pcm; /* assigned PCM instance */
1342 int stream; /* PLAYBACK or CAPTURE */
1343 struct snd_kcontrol *kctl;
1344 const struct snd_pcm_chmap_elem *chmap;
1345 unsigned int max_channels;
1346 unsigned int channel_mask; /* optional: active channels bitmask */
1347 void *private_data; /* optional: private data pointer */
1348};
1349
30b771cf
TI		 1350/**
1351 * snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info
1352 * @info: chmap information
1353 * @idx: the substream number index
1354 */
2d3391ec
TI		 1355static inline struct snd_pcm_substream *
1356snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx)
1357{
1358 struct snd_pcm_substream *s;
1359 for (s = info->pcm->streams[info->stream].substream; s; s = s->next)
1360 if (s->number == idx)
1361 return s;
1362 return NULL;
1363}
1364
1365/* ALSA-standard channel maps (RL/RR prior to C/LFE) */
1366extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[];
1367/* Other world's standard channel maps (C/LFE prior to RL/RR) */
1368extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[];
1369
1370/* bit masks to be passed to snd_pcm_chmap.channel_mask field */
1371#define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4))
1372#define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6))
1373#define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8))
1374
1375int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream,
1376 const struct snd_pcm_chmap_elem *chmap,
1377 int max_channels,
1378 unsigned long private_value,
1379 struct snd_pcm_chmap **info_ret);
1380
30b771cf
TI		 1381/**
1382 * pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise
1383 * @pcm_format: PCM format
1384 */
74c34ca1
EZ		 1385static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format)
1386{
1387 return 1ULL << (__force int) pcm_format;
1388}
1389
09e56df8
TI		 1390/* printk helpers */
1391#define pcm_err(pcm, fmt, args...) \
1392 dev_err((pcm)->card->dev, fmt, ##args)
1393#define pcm_warn(pcm, fmt, args...) \
1394 dev_warn((pcm)->card->dev, fmt, ##args)
1395#define pcm_dbg(pcm, fmt, args...) \
1396 dev_dbg((pcm)->card->dev, fmt, ##args)
1397
1da177e4 1398#endif /* __SOUND_PCM_H */
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