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Linux kernel mirror (for testing)
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linux
1#ifndef __SOUND_PCM_H
2#define __SOUND_PCM_H
3
4/*
5 * Digital Audio (PCM) abstract layer
6 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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>
28#include <linux/poll.h>
29#include <linux/bitops.h>
30
31#define snd_pcm_substream_chip(substream) ((substream)->private_data)
32#define snd_pcm_chip(pcm) ((pcm)->private_data)
33
34#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
35#include "pcm_oss.h"
36#endif
37
38/*
39 * Hardware (lowlevel) section
40 */
41
42struct snd_pcm_hardware {
43 unsigned int info; /* SNDRV_PCM_INFO_* */
44 u64 formats; /* SNDRV_PCM_FMTBIT_* */
45 unsigned int rates; /* SNDRV_PCM_RATE_* */
46 unsigned int rate_min; /* min rate */
47 unsigned int rate_max; /* max rate */
48 unsigned int channels_min; /* min channels */
49 unsigned int channels_max; /* max channels */
50 size_t buffer_bytes_max; /* max buffer size */
51 size_t period_bytes_min; /* min period size */
52 size_t period_bytes_max; /* max period size */
53 unsigned int periods_min; /* min # of periods */
54 unsigned int periods_max; /* max # of periods */
55 size_t fifo_size; /* fifo size in bytes */
56};
57
58struct snd_pcm_ops {
59 int (*open)(struct snd_pcm_substream *substream);
60 int (*close)(struct snd_pcm_substream *substream);
61 int (*ioctl)(struct snd_pcm_substream * substream,
62 unsigned int cmd, void *arg);
63 int (*hw_params)(struct snd_pcm_substream *substream,
64 struct snd_pcm_hw_params *params);
65 int (*hw_free)(struct snd_pcm_substream *substream);
66 int (*prepare)(struct snd_pcm_substream *substream);
67 int (*trigger)(struct snd_pcm_substream *substream, int cmd);
68 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
69 int (*copy)(struct snd_pcm_substream *substream, int channel,
70 snd_pcm_uframes_t pos,
71 void __user *buf, snd_pcm_uframes_t count);
72 int (*silence)(struct snd_pcm_substream *substream, int channel,
73 snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
74 struct page *(*page)(struct snd_pcm_substream *substream,
75 unsigned long offset);
76 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
77 int (*ack)(struct snd_pcm_substream *substream);
78};
79
80/*
81 *
82 */
83
84#define SNDRV_PCM_DEVICES 8
85
86#define SNDRV_PCM_IOCTL1_FALSE ((void *)0)
87#define SNDRV_PCM_IOCTL1_TRUE ((void *)1)
88
89#define SNDRV_PCM_IOCTL1_RESET 0
90#define SNDRV_PCM_IOCTL1_INFO 1
91#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
92#define SNDRV_PCM_IOCTL1_GSTATE 3
93
94#define SNDRV_PCM_TRIGGER_STOP 0
95#define SNDRV_PCM_TRIGGER_START 1
96#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
97#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
98#define SNDRV_PCM_TRIGGER_SUSPEND 5
99#define SNDRV_PCM_TRIGGER_RESUME 6
100
101#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
102
103/* If you change this don't forget to change rates[] table in pcm_native.c */
104#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
105#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
106#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
107#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
108#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
109#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
110#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
111#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
112#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
113#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
114#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
115#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
116#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
117
118#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
119#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
120
121#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
122 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
123 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
124#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
125#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
126 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
127#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
128 SNDRV_PCM_RATE_192000)
129#define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8)
130#define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8)
131#define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE)
132#define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE)
133#define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE)
134#define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE)
135#define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE)
136#define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE)
137#define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE)
138#define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE)
139#define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE)
140#define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE)
141#define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE)
142#define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE)
143#define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
144#define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
145#define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
146#define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
147#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
148#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
149#define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
150#define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW)
151#define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
152#define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG)
153#define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM)
154#define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
155#define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
156#define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
157#define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
158#define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
159#define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
160#define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
161#define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
162#define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
163#define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
164#define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
165#define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
166#define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
167
168#ifdef SNDRV_LITTLE_ENDIAN
169#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
170#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
171#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
172#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
173#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
174#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
175#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
176#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
177#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
178#endif
179#ifdef SNDRV_BIG_ENDIAN
180#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
181#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
182#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
183#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
184#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
185#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
186#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
187#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
188#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
189#endif
190
191struct snd_pcm_file {
192 struct snd_pcm_substream *substream;
193 int no_compat_mmap;
194};
195
196struct snd_pcm_hw_rule;
197typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
198 struct snd_pcm_hw_rule *rule);
199
200struct snd_pcm_hw_rule {
201 unsigned int cond;
202 snd_pcm_hw_rule_func_t func;
203 int var;
204 int deps[4];
205 void *private;
206};
207
208struct snd_pcm_hw_constraints {
209 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
210 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
211 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
212 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
213 unsigned int rules_num;
214 unsigned int rules_all;
215 struct snd_pcm_hw_rule *rules;
216};
217
218static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
219 snd_pcm_hw_param_t var)
220{
221 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
222}
223
224static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
225 snd_pcm_hw_param_t var)
226{
227 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
228}
229
230struct snd_ratnum {
231 unsigned int num;
232 unsigned int den_min, den_max, den_step;
233};
234
235struct snd_ratden {
236 unsigned int num_min, num_max, num_step;
237 unsigned int den;
238};
239
240struct snd_pcm_hw_constraint_ratnums {
241 int nrats;
242 struct snd_ratnum *rats;
243};
244
245struct snd_pcm_hw_constraint_ratdens {
246 int nrats;
247 struct snd_ratden *rats;
248};
249
250struct snd_pcm_hw_constraint_list {
251 unsigned int count;
252 unsigned int *list;
253 unsigned int mask;
254};
255
256struct snd_pcm_runtime {
257 /* -- Status -- */
258 struct snd_pcm_substream *trigger_master;
259 struct timespec trigger_tstamp; /* trigger timestamp */
260 int overrange;
261 snd_pcm_uframes_t avail_max;
262 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
263 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/
264
265 /* -- HW params -- */
266 snd_pcm_access_t access; /* access mode */
267 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
268 snd_pcm_subformat_t subformat; /* subformat */
269 unsigned int rate; /* rate in Hz */
270 unsigned int channels; /* channels */
271 snd_pcm_uframes_t period_size; /* period size */
272 unsigned int periods; /* periods */
273 snd_pcm_uframes_t buffer_size; /* buffer size */
274 unsigned int tick_time; /* tick time */
275 snd_pcm_uframes_t min_align; /* Min alignment for the format */
276 size_t byte_align;
277 unsigned int frame_bits;
278 unsigned int sample_bits;
279 unsigned int info;
280 unsigned int rate_num;
281 unsigned int rate_den;
282
283 /* -- SW params -- */
284 int tstamp_mode; /* mmap timestamp is updated */
285 unsigned int period_step;
286 unsigned int sleep_min; /* min ticks to sleep */
287 snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */
288 snd_pcm_uframes_t start_threshold;
289 snd_pcm_uframes_t stop_threshold;
290 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
291 noise is nearest than this */
292 snd_pcm_uframes_t silence_size; /* Silence filling size */
293 snd_pcm_uframes_t boundary; /* pointers wrap point */
294
295 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
296 snd_pcm_uframes_t silence_filled; /* size filled with silence */
297
298 union snd_pcm_sync_id sync; /* hardware synchronization ID */
299
300 /* -- mmap -- */
301 volatile struct snd_pcm_mmap_status *status;
302 volatile struct snd_pcm_mmap_control *control;
303
304 /* -- locking / scheduling -- */
305 wait_queue_head_t sleep;
306 struct timer_list tick_timer;
307 struct fasync_struct *fasync;
308
309 /* -- private section -- */
310 void *private_data;
311 void (*private_free)(struct snd_pcm_runtime *runtime);
312
313 /* -- hardware description -- */
314 struct snd_pcm_hardware hw;
315 struct snd_pcm_hw_constraints hw_constraints;
316
317 /* -- interrupt callbacks -- */
318 void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
319 void (*transfer_ack_end)(struct snd_pcm_substream *substream);
320
321 /* -- timer -- */
322 unsigned int timer_resolution; /* timer resolution */
323
324 /* -- DMA -- */
325 unsigned char *dma_area; /* DMA area */
326 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
327 size_t dma_bytes; /* size of DMA area */
328
329 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
330
331#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
332 /* -- OSS things -- */
333 struct snd_pcm_oss_runtime oss;
334#endif
335};
336
337struct snd_pcm_group { /* keep linked substreams */
338 spinlock_t lock;
339 struct list_head substreams;
340 int count;
341};
342
343struct snd_pcm_substream {
344 struct snd_pcm *pcm;
345 struct snd_pcm_str *pstr;
346 void *private_data; /* copied from pcm->private_data */
347 int number;
348 char name[32]; /* substream name */
349 int stream; /* stream (direction) */
350 char latency_id[20]; /* latency identifier */
351 size_t buffer_bytes_max; /* limit ring buffer size */
352 struct snd_dma_buffer dma_buffer;
353 unsigned int dma_buf_id;
354 size_t dma_max;
355 /* -- hardware operations -- */
356 struct snd_pcm_ops *ops;
357 /* -- runtime information -- */
358 struct snd_pcm_runtime *runtime;
359 /* -- timer section -- */
360 struct snd_timer *timer; /* timer */
361 unsigned timer_running: 1; /* time is running */
362 spinlock_t timer_lock;
363 /* -- next substream -- */
364 struct snd_pcm_substream *next;
365 /* -- linked substreams -- */
366 struct list_head link_list; /* linked list member */
367 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
368 struct snd_pcm_group *group; /* pointer to current group */
369 /* -- assigned files -- */
370 void *file;
371 int ref_count;
372 atomic_t mmap_count;
373 unsigned int f_flags;
374 void (*pcm_release)(struct snd_pcm_substream *);
375#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
376 /* -- OSS things -- */
377 struct snd_pcm_oss_substream oss;
378#endif
379#ifdef CONFIG_SND_VERBOSE_PROCFS
380 struct snd_info_entry *proc_root;
381 struct snd_info_entry *proc_info_entry;
382 struct snd_info_entry *proc_hw_params_entry;
383 struct snd_info_entry *proc_sw_params_entry;
384 struct snd_info_entry *proc_status_entry;
385 struct snd_info_entry *proc_prealloc_entry;
386#endif
387 /* misc flags */
388 unsigned int hw_opened: 1;
389};
390
391#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
392
393
394struct snd_pcm_str {
395 int stream; /* stream (direction) */
396 struct snd_pcm *pcm;
397 /* -- substreams -- */
398 unsigned int substream_count;
399 unsigned int substream_opened;
400 struct snd_pcm_substream *substream;
401#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
402 /* -- OSS things -- */
403 struct snd_pcm_oss_stream oss;
404#endif
405#ifdef CONFIG_SND_VERBOSE_PROCFS
406 struct snd_info_entry *proc_root;
407 struct snd_info_entry *proc_info_entry;
408#ifdef CONFIG_SND_PCM_XRUN_DEBUG
409 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
410 struct snd_info_entry *proc_xrun_debug_entry;
411#endif
412#endif
413};
414
415struct snd_pcm {
416 struct snd_card *card;
417 struct list_head list;
418 unsigned int device; /* device number */
419 unsigned int info_flags;
420 unsigned short dev_class;
421 unsigned short dev_subclass;
422 char id[64];
423 char name[80];
424 struct snd_pcm_str streams[2];
425 struct mutex open_mutex;
426 wait_queue_head_t open_wait;
427 void *private_data;
428 void (*private_free) (struct snd_pcm *pcm);
429#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
430 struct snd_pcm_oss oss;
431#endif
432};
433
434struct snd_pcm_notify {
435 int (*n_register) (struct snd_pcm * pcm);
436 int (*n_disconnect) (struct snd_pcm * pcm);
437 int (*n_unregister) (struct snd_pcm * pcm);
438 struct list_head list;
439};
440
441/*
442 * Registering
443 */
444
445extern struct file_operations snd_pcm_f_ops[2];
446
447int snd_pcm_new(struct snd_card *card, char *id, int device,
448 int playback_count, int capture_count,
449 struct snd_pcm **rpcm);
450int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
451
452int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
453
454/*
455 * Native I/O
456 */
457
458extern rwlock_t snd_pcm_link_rwlock;
459
460int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
461int snd_pcm_info_user(struct snd_pcm_substream *substream,
462 struct snd_pcm_info __user *info);
463int snd_pcm_status(struct snd_pcm_substream *substream,
464 struct snd_pcm_status *status);
465int snd_pcm_start(struct snd_pcm_substream *substream);
466int snd_pcm_stop(struct snd_pcm_substream *substream, int status);
467int snd_pcm_drain_done(struct snd_pcm_substream *substream);
468#ifdef CONFIG_PM
469int snd_pcm_suspend(struct snd_pcm_substream *substream);
470int snd_pcm_suspend_all(struct snd_pcm *pcm);
471#endif
472int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
473int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
474 struct snd_pcm_substream **rsubstream);
475void snd_pcm_release_substream(struct snd_pcm_substream *substream);
476int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
477 struct snd_pcm_substream **rsubstream);
478void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
479void snd_pcm_vma_notify_data(void *client, void *data);
480int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
481
482#if BITS_PER_LONG >= 64
483
484static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
485{
486 *rem = *n % div;
487 *n /= div;
488}
489
490#elif defined(i386)
491
492static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
493{
494 u_int32_t low, high;
495 low = *n & 0xffffffff;
496 high = *n >> 32;
497 if (high) {
498 u_int32_t high1 = high % div;
499 high /= div;
500 asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
501 *n = (u_int64_t)high << 32 | low;
502 } else {
503 *n = low / div;
504 *rem = low % div;
505 }
506}
507#else
508
509static inline void divl(u_int32_t high, u_int32_t low,
510 u_int32_t div,
511 u_int32_t *q, u_int32_t *r)
512{
513 u_int64_t n = (u_int64_t)high << 32 | low;
514 u_int64_t d = (u_int64_t)div << 31;
515 u_int32_t q1 = 0;
516 int c = 32;
517 while (n > 0xffffffffU) {
518 q1 <<= 1;
519 if (n >= d) {
520 n -= d;
521 q1 |= 1;
522 }
523 d >>= 1;
524 c--;
525 }
526 q1 <<= c;
527 if (n) {
528 low = n;
529 *q = q1 | (low / div);
530 *r = low % div;
531 } else {
532 *r = 0;
533 *q = q1;
534 }
535 return;
536}
537
538static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
539{
540 u_int32_t low, high;
541 low = *n & 0xffffffff;
542 high = *n >> 32;
543 if (high) {
544 u_int32_t high1 = high % div;
545 u_int32_t low1 = low;
546 high /= div;
547 divl(high1, low1, div, &low, rem);
548 *n = (u_int64_t)high << 32 | low;
549 } else {
550 *n = low / div;
551 *rem = low % div;
552 }
553}
554#endif
555
556/*
557 * PCM library
558 */
559
560static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
561{
562 return substream->group != &substream->self_group;
563}
564
565static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
566{
567 read_lock(&snd_pcm_link_rwlock);
568 spin_lock(&substream->self_group.lock);
569}
570
571static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
572{
573 spin_unlock(&substream->self_group.lock);
574 read_unlock(&snd_pcm_link_rwlock);
575}
576
577static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
578{
579 read_lock_irq(&snd_pcm_link_rwlock);
580 spin_lock(&substream->self_group.lock);
581}
582
583static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
584{
585 spin_unlock(&substream->self_group.lock);
586 read_unlock_irq(&snd_pcm_link_rwlock);
587}
588
589#define snd_pcm_stream_lock_irqsave(substream, flags) \
590do { \
591 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
592 spin_lock(&substream->self_group.lock); \
593} while (0)
594
595#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
596do { \
597 spin_unlock(&substream->self_group.lock); \
598 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
599} while (0)
600
601#define snd_pcm_group_for_each(pos, substream) \
602 list_for_each(pos, &substream->group->substreams)
603
604#define snd_pcm_group_substream_entry(pos) \
605 list_entry(pos, struct snd_pcm_substream, link_list)
606
607static inline int snd_pcm_running(struct snd_pcm_substream *substream)
608{
609 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
610 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
611 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
612}
613
614static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
615{
616 return size * 8 / runtime->sample_bits;
617}
618
619static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
620{
621 return size * 8 / runtime->frame_bits;
622}
623
624static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
625{
626 return size * runtime->sample_bits / 8;
627}
628
629static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
630{
631 return size * runtime->frame_bits / 8;
632}
633
634static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
635{
636 return bytes % runtime->byte_align == 0;
637}
638
639static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
640{
641 struct snd_pcm_runtime *runtime = substream->runtime;
642 return frames_to_bytes(runtime, runtime->buffer_size);
643}
644
645static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
646{
647 struct snd_pcm_runtime *runtime = substream->runtime;
648 return frames_to_bytes(runtime, runtime->period_size);
649}
650
651/*
652 * result is: 0 ... (boundary - 1)
653 */
654static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
655{
656 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
657 if (avail < 0)
658 avail += runtime->boundary;
659 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
660 avail -= runtime->boundary;
661 return avail;
662}
663
664/*
665 * result is: 0 ... (boundary - 1)
666 */
667static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
668{
669 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
670 if (avail < 0)
671 avail += runtime->boundary;
672 return avail;
673}
674
675static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
676{
677 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
678}
679
680static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
681{
682 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
683}
684
685/**
686 * snd_pcm_playback_ready - check whether the playback buffer is available
687 * @substream: the pcm substream instance
688 *
689 * Checks whether enough free space is available on the playback buffer.
690 *
691 * Returns non-zero if available, or zero if not.
692 */
693static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
694{
695 struct snd_pcm_runtime *runtime = substream->runtime;
696 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
697}
698
699/**
700 * snd_pcm_capture_ready - check whether the capture buffer is available
701 * @substream: the pcm substream instance
702 *
703 * Checks whether enough capture data is available on the capture buffer.
704 *
705 * Returns non-zero if available, or zero if not.
706 */
707static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
708{
709 struct snd_pcm_runtime *runtime = substream->runtime;
710 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
711}
712
713/**
714 * snd_pcm_playback_data - check whether any data exists on the playback buffer
715 * @substream: the pcm substream instance
716 *
717 * Checks whether any data exists on the playback buffer. If stop_threshold
718 * is bigger or equal to boundary, then this function returns always non-zero.
719 *
720 * Returns non-zero if exists, or zero if not.
721 */
722static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
723{
724 struct snd_pcm_runtime *runtime = substream->runtime;
725
726 if (runtime->stop_threshold >= runtime->boundary)
727 return 1;
728 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
729}
730
731/**
732 * snd_pcm_playback_empty - check whether the playback buffer is empty
733 * @substream: the pcm substream instance
734 *
735 * Checks whether the playback buffer is empty.
736 *
737 * Returns non-zero if empty, or zero if not.
738 */
739static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
740{
741 struct snd_pcm_runtime *runtime = substream->runtime;
742 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
743}
744
745/**
746 * snd_pcm_capture_empty - check whether the capture buffer is empty
747 * @substream: the pcm substream instance
748 *
749 * Checks whether the capture buffer is empty.
750 *
751 * Returns non-zero if empty, or zero if not.
752 */
753static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
754{
755 struct snd_pcm_runtime *runtime = substream->runtime;
756 return snd_pcm_capture_avail(runtime) == 0;
757}
758
759static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
760 struct snd_pcm_substream *master)
761{
762 substream->runtime->trigger_master = master;
763}
764
765static inline int hw_is_mask(int var)
766{
767 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
768 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
769}
770
771static inline int hw_is_interval(int var)
772{
773 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
774 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
775}
776
777static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
778 snd_pcm_hw_param_t var)
779{
780 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
781}
782
783static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
784 snd_pcm_hw_param_t var)
785{
786 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
787}
788
789static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
790 snd_pcm_hw_param_t var)
791{
792 return (const struct snd_mask *)hw_param_mask((struct snd_pcm_hw_params*) params, var);
793}
794
795static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
796 snd_pcm_hw_param_t var)
797{
798 return (const struct snd_interval *)hw_param_interval((struct snd_pcm_hw_params*) params, var);
799}
800
801#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
802#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
803#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
804#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
805#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
806#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
807#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
808#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
809#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
810#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
811#define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min
812
813
814int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
815void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
816void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
817void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
818 unsigned int k, struct snd_interval *c);
819void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
820 const struct snd_interval *b, struct snd_interval *c);
821int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask);
822int snd_interval_ratnum(struct snd_interval *i,
823 unsigned int rats_count, struct snd_ratnum *rats,
824 unsigned int *nump, unsigned int *denp);
825
826void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
827void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
828int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
829
830int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
831
832int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
833int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
834
835int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
836 u_int32_t mask);
837int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
838 u_int64_t mask);
839int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
840 unsigned int min, unsigned int max);
841int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
842int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
843 unsigned int cond,
844 snd_pcm_hw_param_t var,
845 struct snd_pcm_hw_constraint_list *l);
846int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
847 unsigned int cond,
848 snd_pcm_hw_param_t var,
849 struct snd_pcm_hw_constraint_ratnums *r);
850int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
851 unsigned int cond,
852 snd_pcm_hw_param_t var,
853 struct snd_pcm_hw_constraint_ratdens *r);
854int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
855 unsigned int cond,
856 unsigned int width,
857 unsigned int msbits);
858int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
859 unsigned int cond,
860 snd_pcm_hw_param_t var,
861 unsigned long step);
862int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
863 unsigned int cond,
864 snd_pcm_hw_param_t var);
865int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
866 unsigned int cond,
867 int var,
868 snd_pcm_hw_rule_func_t func, void *private,
869 int dep, ...);
870
871int snd_pcm_format_signed(snd_pcm_format_t format);
872int snd_pcm_format_unsigned(snd_pcm_format_t format);
873int snd_pcm_format_linear(snd_pcm_format_t format);
874int snd_pcm_format_little_endian(snd_pcm_format_t format);
875int snd_pcm_format_big_endian(snd_pcm_format_t format);
876#if 0 /* just for DocBook */
877/**
878 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
879 * @format: the format to check
880 *
881 * Returns 1 if the given PCM format is CPU-endian, 0 if
882 * opposite, or a negative error code if endian not specified.
883 */
884int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
885#endif /* DocBook */
886#ifdef SNDRV_LITTLE_ENDIAN
887#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
888#else
889#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
890#endif
891int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
892int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
893ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
894const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
895int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
896snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
897
898void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
899void snd_pcm_set_sync(struct snd_pcm_substream *substream);
900int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
901int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
902 unsigned int cmd, void *arg);
903int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
904int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
905int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
906int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
907int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
908void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
909void snd_pcm_tick_prepare(struct snd_pcm_substream *substream);
910void snd_pcm_tick_set(struct snd_pcm_substream *substream, unsigned long ticks);
911void snd_pcm_tick_elapsed(struct snd_pcm_substream *substream);
912void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
913snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
914 const void __user *buf,
915 snd_pcm_uframes_t frames);
916snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
917 void __user *buf, snd_pcm_uframes_t frames);
918snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
919 void __user **bufs, snd_pcm_uframes_t frames);
920snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
921 void __user **bufs, snd_pcm_uframes_t frames);
922
923int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
924
925static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
926 struct snd_dma_buffer *bufp)
927{
928 struct snd_pcm_runtime *runtime = substream->runtime;
929 if (bufp) {
930 runtime->dma_buffer_p = bufp;
931 runtime->dma_area = bufp->area;
932 runtime->dma_addr = bufp->addr;
933 runtime->dma_bytes = bufp->bytes;
934 } else {
935 runtime->dma_buffer_p = NULL;
936 runtime->dma_area = NULL;
937 runtime->dma_addr = 0;
938 runtime->dma_bytes = 0;
939 }
940}
941
942/*
943 * Timer interface
944 */
945
946void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
947void snd_pcm_timer_init(struct snd_pcm_substream *substream);
948void snd_pcm_timer_done(struct snd_pcm_substream *substream);
949
950/*
951 * Memory
952 */
953
954int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
955int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
956int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
957 int type, struct device *data,
958 size_t size, size_t max);
959int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
960 int type, void *data,
961 size_t size, size_t max);
962int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
963int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
964
965#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data)
966#define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size)
967#define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
968struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset);
969
970/* handle mmap counter - PCM mmap callback should handle this counter properly */
971static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
972{
973 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
974 atomic_inc(&substream->mmap_count);
975}
976
977static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
978{
979 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
980 atomic_dec(&substream->mmap_count);
981}
982
983/* mmap for io-memory area */
984#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
985#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
986int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
987#else
988#define SNDRV_PCM_INFO_MMAP_IOMEM 0
989#define snd_pcm_lib_mmap_iomem NULL
990#endif
991
992static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
993{
994 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
995}
996
997/*
998 * Misc
999 */
1000
1001#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1002 (IEC958_AES1_CON_ORIGINAL<<8)|\
1003 (IEC958_AES1_CON_PCM_CODER<<8)|\
1004 (IEC958_AES3_CON_FS_48000<<24))
1005
1006#endif /* __SOUND_PCM_H */