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mmc: add mmc card sleep and awake support
[linux-block.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
LT		 31#include <linux/bitops.h>
32
1da177e4
LT		 33#define snd_pcm_substream_chip(substream) ((substream)->private_data)
34#define snd_pcm_chip(pcm) ((pcm)->private_data)
35
1da177e4
LT		 36#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
37#include "pcm_oss.h"
38#endif
39
40/*
41 * Hardware (lowlevel) section
42 */
43
877211f5 44struct snd_pcm_hardware {
1da177e4
LT		 45 unsigned int info; /* SNDRV_PCM_INFO_* */
46 u64 formats; /* SNDRV_PCM_FMTBIT_* */
47 unsigned int rates; /* SNDRV_PCM_RATE_* */
48 unsigned int rate_min; /* min rate */
49 unsigned int rate_max; /* max rate */
50 unsigned int channels_min; /* min channels */
51 unsigned int channels_max; /* max channels */
52 size_t buffer_bytes_max; /* max buffer size */
53 size_t period_bytes_min; /* min period size */
54 size_t period_bytes_max; /* max period size */
55 unsigned int periods_min; /* min # of periods */
56 unsigned int periods_max; /* max # of periods */
57 size_t fifo_size; /* fifo size in bytes */
877211f5 58};
1da177e4 59
e0e6ce03
RD		 60struct snd_pcm_substream;
61
877211f5
TI		 62struct snd_pcm_ops {
63 int (*open)(struct snd_pcm_substream *substream);
64 int (*close)(struct snd_pcm_substream *substream);
65 int (*ioctl)(struct snd_pcm_substream * substream,
1da177e4 66 unsigned int cmd, void *arg);
877211f5
TI		 67 int (*hw_params)(struct snd_pcm_substream *substream,
68 struct snd_pcm_hw_params *params);
69 int (*hw_free)(struct snd_pcm_substream *substream);
70 int (*prepare)(struct snd_pcm_substream *substream);
71 int (*trigger)(struct snd_pcm_substream *substream, int cmd);
72 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
73 int (*copy)(struct snd_pcm_substream *substream, int channel,
74 snd_pcm_uframes_t pos,
1da177e4 75 void __user *buf, snd_pcm_uframes_t count);
877211f5 76 int (*silence)(struct snd_pcm_substream *substream, int channel,
1da177e4 77 snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
877211f5
TI		 78 struct page *(*page)(struct snd_pcm_substream *substream,
79 unsigned long offset);
80 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
81 int (*ack)(struct snd_pcm_substream *substream);
82};
1da177e4
LT		 83
84/*
85 *
86 */
87
f90c06a2
PM		 88#if defined(CONFIG_SND_DYNAMIC_MINORS)
89#define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2)
90#else
91#define SNDRV_PCM_DEVICES 8
92#endif
896e6cc2 93
1da177e4
LT		 94#define SNDRV_PCM_IOCTL1_FALSE ((void *)0)
95#define SNDRV_PCM_IOCTL1_TRUE ((void *)1)
96
97#define SNDRV_PCM_IOCTL1_RESET 0
98#define SNDRV_PCM_IOCTL1_INFO 1
99#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
100#define SNDRV_PCM_IOCTL1_GSTATE 3
8bea869c 101#define SNDRV_PCM_IOCTL1_FIFO_SIZE 4
1da177e4
LT		 102
103#define SNDRV_PCM_TRIGGER_STOP 0
104#define SNDRV_PCM_TRIGGER_START 1
105#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
106#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
107#define SNDRV_PCM_TRIGGER_SUSPEND 5
108#define SNDRV_PCM_TRIGGER_RESUME 6
109
110#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
111
112/* If you change this don't forget to change rates[] table in pcm_native.c */
113#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
114#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
115#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
116#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
117#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
118#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
119#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
120#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
121#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
122#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
123#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
124#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
125#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
126
127#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
128#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
129
130#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
131 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
132 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
133#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
134#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
135 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
136#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
137 SNDRV_PCM_RATE_192000)
138#define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8)
139#define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8)
140#define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE)
141#define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE)
142#define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE)
143#define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE)
144#define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE)
145#define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE)
146#define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE)
147#define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE)
148#define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE)
149#define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE)
150#define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE)
151#define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE)
152#define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
153#define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
154#define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
155#define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
156#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
157#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
158#define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
159#define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW)
160#define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
161#define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG)
162#define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM)
163#define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
164#define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
165#define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
166#define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
167#define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
168#define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
169#define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
170#define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
171#define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
172#define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
173#define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
174#define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
175#define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
176
177#ifdef SNDRV_LITTLE_ENDIAN
178#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
179#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
180#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
181#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
182#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
183#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
184#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
185#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
186#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
187#endif
188#ifdef SNDRV_BIG_ENDIAN
189#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
190#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
191#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
192#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
193#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
194#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
195#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
196#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
197#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
198#endif
199
877211f5
TI		 200struct snd_pcm_file {
201 struct snd_pcm_substream *substream;
548a648b 202 int no_compat_mmap;
1da177e4
LT		 203};
204
877211f5
TI		 205struct snd_pcm_hw_rule;
206typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
207 struct snd_pcm_hw_rule *rule);
1da177e4 208
877211f5 209struct snd_pcm_hw_rule {
1da177e4
LT		 210 unsigned int cond;
211 snd_pcm_hw_rule_func_t func;
212 int var;
213 int deps[4];
214 void *private;
215};
216
877211f5
TI		 217struct snd_pcm_hw_constraints {
218 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
1da177e4 219 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
877211f5 220 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
1da177e4
LT		 221 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
222 unsigned int rules_num;
223 unsigned int rules_all;
877211f5
TI		 224 struct snd_pcm_hw_rule *rules;
225};
1da177e4 226
877211f5
TI		 227static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
228 snd_pcm_hw_param_t var)
1da177e4
LT		 229{
230 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
231}
232
877211f5
TI		 233static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
234 snd_pcm_hw_param_t var)
1da177e4
LT		 235{
236 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
237}
238
877211f5 239struct snd_ratnum {
1da177e4
LT		 240 unsigned int num;
241 unsigned int den_min, den_max, den_step;
877211f5 242};
1da177e4 243
877211f5 244struct snd_ratden {
1da177e4
LT		 245 unsigned int num_min, num_max, num_step;
246 unsigned int den;
877211f5 247};
1da177e4 248
877211f5 249struct snd_pcm_hw_constraint_ratnums {
1da177e4 250 int nrats;
877211f5
TI		 251 struct snd_ratnum *rats;
252};
1da177e4 253
877211f5 254struct snd_pcm_hw_constraint_ratdens {
1da177e4 255 int nrats;
877211f5
TI		 256 struct snd_ratden *rats;
257};
1da177e4 258
877211f5 259struct snd_pcm_hw_constraint_list {
1da177e4
LT		 260 unsigned int count;
261 unsigned int *list;
262 unsigned int mask;
877211f5 263};
1da177e4 264
877211f5 265struct snd_pcm_runtime {
1da177e4 266 /* -- Status -- */
877211f5 267 struct snd_pcm_substream *trigger_master;
07799e75 268 struct timespec trigger_tstamp; /* trigger timestamp */
1da177e4
LT		 269 int overrange;
270 snd_pcm_uframes_t avail_max;
271 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
bbf6ad13
JK		 272 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
273 unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
4bbe1ddf 274 snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */
1da177e4
LT		 275
276 /* -- HW params -- */
277 snd_pcm_access_t access; /* access mode */
278 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
279 snd_pcm_subformat_t subformat; /* subformat */
280 unsigned int rate; /* rate in Hz */
281 unsigned int channels; /* channels */
282 snd_pcm_uframes_t period_size; /* period size */
283 unsigned int periods; /* periods */
284 snd_pcm_uframes_t buffer_size; /* buffer size */
1da177e4
LT		 285 snd_pcm_uframes_t min_align; /* Min alignment for the format */
286 size_t byte_align;
287 unsigned int frame_bits;
288 unsigned int sample_bits;
289 unsigned int info;
290 unsigned int rate_num;
291 unsigned int rate_den;
292
293 /* -- SW params -- */
877211f5 294 int tstamp_mode; /* mmap timestamp is updated */
1da177e4 295 unsigned int period_step;
1da177e4
LT		 296 snd_pcm_uframes_t start_threshold;
297 snd_pcm_uframes_t stop_threshold;
298 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
299 noise is nearest than this */
300 snd_pcm_uframes_t silence_size; /* Silence filling size */
301 snd_pcm_uframes_t boundary; /* pointers wrap point */
302
303 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
304 snd_pcm_uframes_t silence_filled; /* size filled with silence */
305
877211f5 306 union snd_pcm_sync_id sync; /* hardware synchronization ID */
1da177e4
LT		 307
308 /* -- mmap -- */
503fc85a
TI		 309 struct snd_pcm_mmap_status *status;
310 struct snd_pcm_mmap_control *control;
1da177e4
LT		 311
312 /* -- locking / scheduling -- */
313 wait_queue_head_t sleep;
1da177e4
LT		 314 struct fasync_struct *fasync;
315
316 /* -- private section -- */
317 void *private_data;
877211f5 318 void (*private_free)(struct snd_pcm_runtime *runtime);
1da177e4
LT		 319
320 /* -- hardware description -- */
877211f5
TI		 321 struct snd_pcm_hardware hw;
322 struct snd_pcm_hw_constraints hw_constraints;
1da177e4
LT		 323
324 /* -- interrupt callbacks -- */
877211f5
TI		 325 void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
326 void (*transfer_ack_end)(struct snd_pcm_substream *substream);
1da177e4
LT		 327
328 /* -- timer -- */
329 unsigned int timer_resolution; /* timer resolution */
b751eef1 330 int tstamp_type; /* timestamp type */
1da177e4
LT		 331
332 /* -- DMA -- */
333 unsigned char *dma_area; /* DMA area */
334 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
335 size_t dma_bytes; /* size of DMA area */
336
337 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
338
339#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
340 /* -- OSS things -- */
877211f5 341 struct snd_pcm_oss_runtime oss;
1da177e4
LT		 342#endif
343};
344
877211f5 345struct snd_pcm_group { /* keep linked substreams */
1da177e4
LT		 346 spinlock_t lock;
347 struct list_head substreams;
348 int count;
877211f5 349};
1da177e4 350
877211f5
TI		 351struct snd_pcm_substream {
352 struct snd_pcm *pcm;
353 struct snd_pcm_str *pstr;
1da177e4
LT		 354 void *private_data; /* copied from pcm->private_data */
355 int number;
356 char name[32]; /* substream name */
357 int stream; /* stream (direction) */
9442e691 358 char latency_id[20]; /* latency identifier */
1da177e4
LT		 359 size_t buffer_bytes_max; /* limit ring buffer size */
360 struct snd_dma_buffer dma_buffer;
361 unsigned int dma_buf_id;
362 size_t dma_max;
363 /* -- hardware operations -- */
877211f5 364 struct snd_pcm_ops *ops;
1da177e4 365 /* -- runtime information -- */
877211f5 366 struct snd_pcm_runtime *runtime;
1da177e4 367 /* -- timer section -- */
877211f5 368 struct snd_timer *timer; /* timer */
1da177e4 369 unsigned timer_running: 1; /* time is running */
1da177e4 370 /* -- next substream -- */
877211f5 371 struct snd_pcm_substream *next;
1da177e4
LT		 372 /* -- linked substreams -- */
373 struct list_head link_list; /* linked list member */
877211f5
TI		 374 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
375 struct snd_pcm_group *group; /* pointer to current group */
1da177e4 376 /* -- assigned files -- */
1576274d 377 void *file;
0df63e44 378 int ref_count;
9c323fcb 379 atomic_t mmap_count;
0df63e44 380 unsigned int f_flags;
3bf75f9b 381 void (*pcm_release)(struct snd_pcm_substream *);
1da177e4
LT		 382#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
383 /* -- OSS things -- */
877211f5 384 struct snd_pcm_oss_substream oss;
1da177e4 385#endif
b7d90a35 386#ifdef CONFIG_SND_VERBOSE_PROCFS
877211f5
TI		 387 struct snd_info_entry *proc_root;
388 struct snd_info_entry *proc_info_entry;
389 struct snd_info_entry *proc_hw_params_entry;
390 struct snd_info_entry *proc_sw_params_entry;
391 struct snd_info_entry *proc_status_entry;
392 struct snd_info_entry *proc_prealloc_entry;
c7132aeb 393 struct snd_info_entry *proc_prealloc_max_entry;
b7d90a35 394#endif
1da177e4 395 /* misc flags */
3bf75f9b 396 unsigned int hw_opened: 1;
1da177e4
LT		 397};
398
0df63e44 399#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
1da177e4
LT		 400
401
877211f5 402struct snd_pcm_str {
1da177e4 403 int stream; /* stream (direction) */
877211f5 404 struct snd_pcm *pcm;
1da177e4
LT		 405 /* -- substreams -- */
406 unsigned int substream_count;
407 unsigned int substream_opened;
877211f5 408 struct snd_pcm_substream *substream;
1da177e4
LT		 409#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
410 /* -- OSS things -- */
877211f5 411 struct snd_pcm_oss_stream oss;
1da177e4 412#endif
b7d90a35 413#ifdef CONFIG_SND_VERBOSE_PROCFS
877211f5
TI		 414 struct snd_info_entry *proc_root;
415 struct snd_info_entry *proc_info_entry;
b7d90a35 416#ifdef CONFIG_SND_PCM_XRUN_DEBUG
1da177e4 417 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
877211f5 418 struct snd_info_entry *proc_xrun_debug_entry;
1da177e4 419#endif
b7d90a35 420#endif
1da177e4
LT		 421};
422
877211f5
TI		 423struct snd_pcm {
424 struct snd_card *card;
f87135f5 425 struct list_head list;
f90c06a2 426 int device; /* device number */
1da177e4
LT		 427 unsigned int info_flags;
428 unsigned short dev_class;
429 unsigned short dev_subclass;
430 char id[64];
431 char name[80];
877211f5 432 struct snd_pcm_str streams[2];
1a60d4c5 433 struct mutex open_mutex;
1da177e4
LT		 434 wait_queue_head_t open_wait;
435 void *private_data;
877211f5 436 void (*private_free) (struct snd_pcm *pcm);
c78085fc 437 struct device *dev; /* actual hw device this belongs to */
1da177e4 438#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
877211f5 439 struct snd_pcm_oss oss;
1da177e4
LT		 440#endif
441};
442
877211f5
TI		 443struct snd_pcm_notify {
444 int (*n_register) (struct snd_pcm * pcm);
445 int (*n_disconnect) (struct snd_pcm * pcm);
446 int (*n_unregister) (struct snd_pcm * pcm);
1da177e4 447 struct list_head list;
877211f5 448};
1da177e4
LT		 449
450/*
451 * Registering
452 */
453
54047320 454extern const struct file_operations snd_pcm_f_ops[2];
1da177e4 455
e6161653 456int snd_pcm_new(struct snd_card *card, const char *id, int device,
1da177e4 457 int playback_count, int capture_count,
877211f5
TI		 458 struct snd_pcm **rpcm);
459int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
1da177e4 460
877211f5 461int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
1da177e4
LT		 462
463/*
464 * Native I/O
465 */
466
467extern rwlock_t snd_pcm_link_rwlock;
468
877211f5
TI		 469int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
470int snd_pcm_info_user(struct snd_pcm_substream *substream,
471 struct snd_pcm_info __user *info);
472int snd_pcm_status(struct snd_pcm_substream *substream,
473 struct snd_pcm_status *status);
877211f5
TI		 474int snd_pcm_start(struct snd_pcm_substream *substream);
475int snd_pcm_stop(struct snd_pcm_substream *substream, int status);
476int snd_pcm_drain_done(struct snd_pcm_substream *substream);
1da177e4 477#ifdef CONFIG_PM
877211f5
TI		 478int snd_pcm_suspend(struct snd_pcm_substream *substream);
479int snd_pcm_suspend_all(struct snd_pcm *pcm);
1da177e4 480#endif
877211f5 481int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
3bf75f9b
TI		 482int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
483 struct snd_pcm_substream **rsubstream);
877211f5 484void snd_pcm_release_substream(struct snd_pcm_substream *substream);
3bf75f9b
TI		 485int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
486 struct snd_pcm_substream **rsubstream);
487void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
1da177e4 488void snd_pcm_vma_notify_data(void *client, void *data);
877211f5 489int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
1da177e4 490
1da177e4
LT		 491/*
492 * PCM library
493 */
494
877211f5 495static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
1da177e4
LT		 496{
497 return substream->group != &substream->self_group;
498}
499
877211f5 500static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
1da177e4
LT		 501{
502 read_lock(&snd_pcm_link_rwlock);
503 spin_lock(&substream->self_group.lock);
504}
505
877211f5 506static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
1da177e4
LT		 507{
508 spin_unlock(&substream->self_group.lock);
509 read_unlock(&snd_pcm_link_rwlock);
510}
511
877211f5 512static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
1da177e4
LT		 513{
514 read_lock_irq(&snd_pcm_link_rwlock);
515 spin_lock(&substream->self_group.lock);
516}
517
877211f5 518static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
1da177e4
LT		 519{
520 spin_unlock(&substream->self_group.lock);
521 read_unlock_irq(&snd_pcm_link_rwlock);
522}
523
524#define snd_pcm_stream_lock_irqsave(substream, flags) \
525do { \
526 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
527 spin_lock(&substream->self_group.lock); \
528} while (0)
529
530#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
531do { \
532 spin_unlock(&substream->self_group.lock); \
533 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
534} while (0)
535
ef991b95
TI		 536#define snd_pcm_group_for_each_entry(s, substream) \
537 list_for_each_entry(s, &substream->group->substreams, link_list)
1da177e4 538
877211f5 539static inline int snd_pcm_running(struct snd_pcm_substream *substream)
1da177e4
LT		 540{
541 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
542 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
543 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
544}
545
877211f5 546static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 547{
548 return size * 8 / runtime->sample_bits;
549}
550
877211f5 551static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 552{
553 return size * 8 / runtime->frame_bits;
554}
555
877211f5 556static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 557{
558 return size * runtime->sample_bits / 8;
559}
560
877211f5 561static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
1da177e4
LT		 562{
563 return size * runtime->frame_bits / 8;
564}
565
877211f5 566static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
1da177e4
LT		 567{
568 return bytes % runtime->byte_align == 0;
569}
570
877211f5 571static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
1da177e4 572{
877211f5 573 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 574 return frames_to_bytes(runtime, runtime->buffer_size);
575}
576
877211f5 577static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
1da177e4 578{
877211f5 579 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 580 return frames_to_bytes(runtime, runtime->period_size);
581}
582
583/*
584 * result is: 0 ... (boundary - 1)
585 */
877211f5 586static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 587{
588 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
589 if (avail < 0)
590 avail += runtime->boundary;
591 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
592 avail -= runtime->boundary;
593 return avail;
594}
595
596/*
597 * result is: 0 ... (boundary - 1)
598 */
877211f5 599static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 600{
601 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
602 if (avail < 0)
603 avail += runtime->boundary;
604 return avail;
605}
606
877211f5 607static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 608{
609 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
610}
611
877211f5 612static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 613{
614 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
615}
616
617/**
618 * snd_pcm_playback_ready - check whether the playback buffer is available
619 * @substream: the pcm substream instance
620 *
621 * Checks whether enough free space is available on the playback buffer.
622 *
623 * Returns non-zero if available, or zero if not.
624 */
877211f5 625static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
1da177e4 626{
877211f5 627 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 628 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
629}
630
631/**
632 * snd_pcm_capture_ready - check whether the capture buffer is available
633 * @substream: the pcm substream instance
634 *
635 * Checks whether enough capture data is available on the capture buffer.
636 *
637 * Returns non-zero if available, or zero if not.
638 */
877211f5 639static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
1da177e4 640{
877211f5 641 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 642 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
643}
644
645/**
646 * snd_pcm_playback_data - check whether any data exists on the playback buffer
647 * @substream: the pcm substream instance
648 *
649 * Checks whether any data exists on the playback buffer. If stop_threshold
650 * is bigger or equal to boundary, then this function returns always non-zero.
651 *
652 * Returns non-zero if exists, or zero if not.
653 */
877211f5 654static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
1da177e4 655{
877211f5 656 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 657
658 if (runtime->stop_threshold >= runtime->boundary)
659 return 1;
660 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
661}
662
663/**
664 * snd_pcm_playback_empty - check whether the playback buffer is empty
665 * @substream: the pcm substream instance
666 *
667 * Checks whether the playback buffer is empty.
668 *
669 * Returns non-zero if empty, or zero if not.
670 */
877211f5 671static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
1da177e4 672{
877211f5 673 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 674 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
675}
676
677/**
678 * snd_pcm_capture_empty - check whether the capture buffer is empty
679 * @substream: the pcm substream instance
680 *
681 * Checks whether the capture buffer is empty.
682 *
683 * Returns non-zero if empty, or zero if not.
684 */
877211f5 685static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
1da177e4 686{
877211f5 687 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 688 return snd_pcm_capture_avail(runtime) == 0;
689}
690
877211f5
TI		 691static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
692 struct snd_pcm_substream *master)
1da177e4
LT		 693{
694 substream->runtime->trigger_master = master;
695}
696
697static inline int hw_is_mask(int var)
698{
699 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
700 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
701}
702
703static inline int hw_is_interval(int var)
704{
705 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
706 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
707}
708
877211f5 709static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
1da177e4
LT		 710 snd_pcm_hw_param_t var)
711{
712 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
713}
714
877211f5 715static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
1da177e4
LT		 716 snd_pcm_hw_param_t var)
717{
718 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
719}
720
877211f5 721static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 722 snd_pcm_hw_param_t var)
723{
b9f09a48 724 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
1da177e4
LT		 725}
726
877211f5 727static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 728 snd_pcm_hw_param_t var)
729{
b9f09a48 730 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
1da177e4
LT		 731}
732
733#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
734#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
735#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
736#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
737#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
738#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
739#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
740#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
741#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
742#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
1da177e4
LT		 743
744
877211f5
TI		 745int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
746void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
747void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
748void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
749 unsigned int k, struct snd_interval *c);
750void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
751 const struct snd_interval *b, struct snd_interval *c);
752int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask);
753int snd_interval_ratnum(struct snd_interval *i,
754 unsigned int rats_count, struct snd_ratnum *rats,
1da177e4
LT		 755 unsigned int *nump, unsigned int *denp);
756
877211f5
TI		 757void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
758void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
877211f5 759int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 760
877211f5 761int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 762
877211f5
TI		 763int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
764int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
1da177e4 765
877211f5 766int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 767 u_int32_t mask);
877211f5 768int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 769 u_int64_t mask);
877211f5 770int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 771 unsigned int min, unsigned int max);
877211f5
TI		 772int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
773int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
1da177e4
LT		 774 unsigned int cond,
775 snd_pcm_hw_param_t var,
877211f5
TI		 776 struct snd_pcm_hw_constraint_list *l);
777int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
1da177e4
LT		 778 unsigned int cond,
779 snd_pcm_hw_param_t var,
877211f5
TI		 780 struct snd_pcm_hw_constraint_ratnums *r);
781int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
1da177e4
LT		 782 unsigned int cond,
783 snd_pcm_hw_param_t var,
877211f5
TI		 784 struct snd_pcm_hw_constraint_ratdens *r);
785int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
1da177e4
LT		 786 unsigned int cond,
787 unsigned int width,
788 unsigned int msbits);
877211f5 789int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
1da177e4
LT		 790 unsigned int cond,
791 snd_pcm_hw_param_t var,
792 unsigned long step);
877211f5 793int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
1da177e4
LT		 794 unsigned int cond,
795 snd_pcm_hw_param_t var);
877211f5 796int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
1da177e4
LT		 797 unsigned int cond,
798 int var,
799 snd_pcm_hw_rule_func_t func, void *private,
800 int dep, ...);
801
802int snd_pcm_format_signed(snd_pcm_format_t format);
803int snd_pcm_format_unsigned(snd_pcm_format_t format);
804int snd_pcm_format_linear(snd_pcm_format_t format);
805int snd_pcm_format_little_endian(snd_pcm_format_t format);
806int snd_pcm_format_big_endian(snd_pcm_format_t format);
1b44c28d
TI		 807#if 0 /* just for DocBook */
808/**
9502dcad
TI		 809 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
810 * @format: the format to check
811 *
812 * Returns 1 if the given PCM format is CPU-endian, 0 if
813 * opposite, or a negative error code if endian not specified.
814 */
8cdfd251 815int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1b44c28d 816#endif /* DocBook */
9502dcad 817#ifdef SNDRV_LITTLE_ENDIAN
9d01a82e 818#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
9502dcad 819#else
9d01a82e 820#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
9502dcad 821#endif
1da177e4
LT		 822int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
823int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
9502dcad 824ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1da177e4
LT		 825const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
826int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
827snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
1da177e4 828
877211f5
TI		 829void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
830void snd_pcm_set_sync(struct snd_pcm_substream *substream);
831int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
832int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
1da177e4 833 unsigned int cmd, void *arg);
877211f5
TI		 834int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
835int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
836int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
837int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
838int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
839void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
877211f5
TI		 840void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
841snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
1da177e4
LT		 842 const void __user *buf,
843 snd_pcm_uframes_t frames);
877211f5 844snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
1da177e4 845 void __user *buf, snd_pcm_uframes_t frames);
877211f5 846snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
1da177e4 847 void __user **bufs, snd_pcm_uframes_t frames);
877211f5 848snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
1da177e4
LT		 849 void __user **bufs, snd_pcm_uframes_t frames);
850
7653d557
CL		 851extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
852
877211f5 853int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
918f3a0e 854unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
1da177e4 855
877211f5 856static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
1da177e4
LT		 857 struct snd_dma_buffer *bufp)
858{
877211f5 859 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 860 if (bufp) {
861 runtime->dma_buffer_p = bufp;
862 runtime->dma_area = bufp->area;
863 runtime->dma_addr = bufp->addr;
864 runtime->dma_bytes = bufp->bytes;
865 } else {
866 runtime->dma_buffer_p = NULL;
867 runtime->dma_area = NULL;
868 runtime->dma_addr = 0;
869 runtime->dma_bytes = 0;
870 }
871}
872
873/*
874 * Timer interface
875 */
876
877211f5
TI		 877void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
878void snd_pcm_timer_init(struct snd_pcm_substream *substream);
879void snd_pcm_timer_done(struct snd_pcm_substream *substream);
1da177e4 880
b751eef1
JK		 881static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
882 struct timespec *tv)
883{
884 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
885 do_posix_clock_monotonic_gettime(tv);
886 else
887 getnstimeofday(tv);
888}
889
1da177e4
LT		 890/*
891 * Memory
892 */
893
877211f5
TI		 894int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
895int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
896int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
1da177e4
LT		 897 int type, struct device *data,
898 size_t size, size_t max);
877211f5 899int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
1da177e4
LT		 900 int type, void *data,
901 size_t size, size_t max);
877211f5
TI		 902int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
903int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
1da177e4 904
cc6a8acd 905#ifdef CONFIG_SND_DMA_SGBUF
77a23f26
TI		 906/*
907 * SG-buffer handling
908 */
909#define snd_pcm_substream_sgbuf(substream) \
910 ((substream)->runtime->dma_buffer_p->private_data)
911
912static inline dma_addr_t
913snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
914{
915 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
916 return snd_sgbuf_get_addr(sg, ofs);
917}
918
919static inline void *
920snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
921{
922 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
923 return snd_sgbuf_get_ptr(sg, ofs);
924}
925
926struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
927 unsigned long offset);
51e9f2e6
TI		 928unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
929 unsigned int ofs, unsigned int size);
1da177e4 930
cc6a8acd
TI		 931#else /* !SND_DMA_SGBUF */
932/*
933 * fake using a continuous buffer
934 */
935static inline dma_addr_t
936snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
937{
938 return substream->runtime->dma_addr + ofs;
939}
940
941static inline void *
942snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
943{
944 return substream->runtime->dma_area + ofs;
945}
946
947#define snd_pcm_sgbuf_ops_page NULL
948
949#define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size)
950
951#endif /* SND_DMA_SGBUF */
952
1da177e4
LT		 953/* handle mmap counter - PCM mmap callback should handle this counter properly */
954static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
955{
877211f5 956 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 957 atomic_inc(&substream->mmap_count);
1da177e4
LT		 958}
959
960static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
961{
877211f5 962 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
9c323fcb 963 atomic_dec(&substream->mmap_count);
1da177e4
LT		 964}
965
966/* mmap for io-memory area */
967#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
968#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
877211f5 969int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1da177e4
LT		 970#else
971#define SNDRV_PCM_INFO_MMAP_IOMEM 0
972#define snd_pcm_lib_mmap_iomem NULL
973#endif
974
975static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
976{
977 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
978}
979
980/*
981 * Misc
982 */
983
984#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
985 (IEC958_AES1_CON_ORIGINAL<<8)|\
986 (IEC958_AES1_CON_PCM_CODER<<8)|\
987 (IEC958_AES3_CON_FS_48000<<24))
988
7eaa943c
TI		 989#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
990
6e5265ec
TI		 991const char *snd_pcm_format_name(snd_pcm_format_t format);
992
1da177e4 993#endif /* __SOUND_PCM_H */
Linux 6.x block layer and io_uring tree(s)