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[ALSA] dynamic minors (2/6): simplify storage of snd_minor structures
[net-next-2.6.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
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
1da177e4
LT		 31#define snd_pcm_substream_chip(substream) ((substream)->private_data)
32#define snd_pcm_chip(pcm) ((pcm)->private_data)
33
1da177e4
LT		 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
877211f5 42struct snd_pcm_hardware {
1da177e4
LT		 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 */
877211f5 56};
1da177e4 57
877211f5
TI		 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,
1da177e4 62 unsigned int cmd, void *arg);
877211f5
TI		 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,
1da177e4 71 void __user *buf, snd_pcm_uframes_t count);
877211f5 72 int (*silence)(struct snd_pcm_substream *substream, int channel,
1da177e4 73 snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
877211f5
TI		 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};
1da177e4
LT		 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
877211f5
TI		 191struct snd_pcm_file {
192 struct snd_pcm_substream *substream;
193 struct snd_pcm_file *next;
1da177e4
LT		 194};
195
877211f5
TI		 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);
1da177e4 199
877211f5 200struct snd_pcm_hw_rule {
1da177e4
LT		 201 unsigned int cond;
202 snd_pcm_hw_rule_func_t func;
203 int var;
204 int deps[4];
205 void *private;
206};
207
877211f5
TI		 208struct snd_pcm_hw_constraints {
209 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
1da177e4 210 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
877211f5 211 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
1da177e4
LT		 212 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
213 unsigned int rules_num;
214 unsigned int rules_all;
877211f5
TI		 215 struct snd_pcm_hw_rule *rules;
216};
1da177e4 217
877211f5
TI		 218static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
219 snd_pcm_hw_param_t var)
1da177e4
LT		 220{
221 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
222}
223
877211f5
TI		 224static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
225 snd_pcm_hw_param_t var)
1da177e4
LT		 226{
227 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
228}
229
877211f5 230struct snd_ratnum {
1da177e4
LT		 231 unsigned int num;
232 unsigned int den_min, den_max, den_step;
877211f5 233};
1da177e4 234
877211f5 235struct snd_ratden {
1da177e4
LT		 236 unsigned int num_min, num_max, num_step;
237 unsigned int den;
877211f5 238};
1da177e4 239
877211f5 240struct snd_pcm_hw_constraint_ratnums {
1da177e4 241 int nrats;
877211f5
TI		 242 struct snd_ratnum *rats;
243};
1da177e4 244
877211f5 245struct snd_pcm_hw_constraint_ratdens {
1da177e4 246 int nrats;
877211f5
TI		 247 struct snd_ratden *rats;
248};
1da177e4 249
877211f5 250struct snd_pcm_hw_constraint_list {
1da177e4
LT		 251 unsigned int count;
252 unsigned int *list;
253 unsigned int mask;
877211f5 254};
1da177e4 255
877211f5 256struct snd_pcm_runtime {
1da177e4 257 /* -- Status -- */
877211f5 258 struct snd_pcm_substream *trigger_master;
07799e75 259 struct timespec trigger_tstamp; /* trigger timestamp */
1da177e4
LT		 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 -- */
877211f5 284 int tstamp_mode; /* mmap timestamp is updated */
1da177e4
LT		 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
877211f5 298 union snd_pcm_sync_id sync; /* hardware synchronization ID */
1da177e4
LT		 299
300 /* -- mmap -- */
877211f5
TI		 301 volatile struct snd_pcm_mmap_status *status;
302 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 303 atomic_t mmap_count;
304
305 /* -- locking / scheduling -- */
306 wait_queue_head_t sleep;
307 struct timer_list tick_timer;
308 struct fasync_struct *fasync;
309
310 /* -- private section -- */
311 void *private_data;
877211f5 312 void (*private_free)(struct snd_pcm_runtime *runtime);
1da177e4
LT		 313
314 /* -- hardware description -- */
877211f5
TI		 315 struct snd_pcm_hardware hw;
316 struct snd_pcm_hw_constraints hw_constraints;
1da177e4
LT		 317
318 /* -- interrupt callbacks -- */
877211f5
TI		 319 void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
320 void (*transfer_ack_end)(struct snd_pcm_substream *substream);
1da177e4
LT		 321
322 /* -- timer -- */
323 unsigned int timer_resolution; /* timer resolution */
324
325 /* -- DMA -- */
326 unsigned char *dma_area; /* DMA area */
327 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
328 size_t dma_bytes; /* size of DMA area */
329
330 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
331
332#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
333 /* -- OSS things -- */
877211f5 334 struct snd_pcm_oss_runtime oss;
1da177e4
LT		 335#endif
336};
337
877211f5 338struct snd_pcm_group { /* keep linked substreams */
1da177e4
LT		 339 spinlock_t lock;
340 struct list_head substreams;
341 int count;
877211f5 342};
1da177e4 343
877211f5
TI		 344struct snd_pcm_substream {
345 struct snd_pcm *pcm;
346 struct snd_pcm_str *pstr;
1da177e4
LT		 347 void *private_data; /* copied from pcm->private_data */
348 int number;
349 char name[32]; /* substream name */
350 int stream; /* stream (direction) */
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 -- */
877211f5 356 struct snd_pcm_ops *ops;
1da177e4 357 /* -- runtime information -- */
877211f5 358 struct snd_pcm_runtime *runtime;
1da177e4 359 /* -- timer section -- */
877211f5 360 struct snd_timer *timer; /* timer */
1da177e4
LT		 361 unsigned timer_running: 1; /* time is running */
362 spinlock_t timer_lock;
363 /* -- next substream -- */
877211f5 364 struct snd_pcm_substream *next;
1da177e4
LT		 365 /* -- linked substreams -- */
366 struct list_head link_list; /* linked list member */
877211f5
TI		 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 */
1da177e4 369 /* -- assigned files -- */
877211f5 370 struct snd_pcm_file *file;
1da177e4
LT		 371 struct file *ffile;
372#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
373 /* -- OSS things -- */
877211f5 374 struct snd_pcm_oss_substream oss;
1da177e4 375#endif
877211f5
TI		 376 struct snd_info_entry *proc_root;
377 struct snd_info_entry *proc_info_entry;
378 struct snd_info_entry *proc_hw_params_entry;
379 struct snd_info_entry *proc_sw_params_entry;
380 struct snd_info_entry *proc_status_entry;
381 struct snd_info_entry *proc_prealloc_entry;
1da177e4
LT		 382 /* misc flags */
383 unsigned int no_mmap_ctrl: 1;
384};
385
386#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
387#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL || ((substream)->oss.file != NULL))
388#else
389#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL)
390#endif
391
392
877211f5 393struct snd_pcm_str {
1da177e4 394 int stream; /* stream (direction) */
877211f5 395 struct snd_pcm *pcm;
1da177e4
LT		 396 /* -- substreams -- */
397 unsigned int substream_count;
398 unsigned int substream_opened;
877211f5 399 struct snd_pcm_substream *substream;
1da177e4
LT		 400#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
401 /* -- OSS things -- */
877211f5 402 struct snd_pcm_oss_stream oss;
1da177e4 403#endif
877211f5 404 struct snd_pcm_file *files;
877211f5
TI		 405 struct snd_info_entry *proc_root;
406 struct snd_info_entry *proc_info_entry;
1da177e4
LT		 407#ifdef CONFIG_SND_DEBUG
408 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
877211f5 409 struct snd_info_entry *proc_xrun_debug_entry;
1da177e4
LT		 410#endif
411};
412
877211f5
TI		 413struct snd_pcm {
414 struct snd_card *card;
1da177e4
LT		 415 unsigned int device; /* device number */
416 unsigned int info_flags;
417 unsigned short dev_class;
418 unsigned short dev_subclass;
419 char id[64];
420 char name[80];
877211f5 421 struct snd_pcm_str streams[2];
1da177e4
LT		 422 struct semaphore open_mutex;
423 wait_queue_head_t open_wait;
424 void *private_data;
877211f5 425 void (*private_free) (struct snd_pcm *pcm);
1da177e4 426#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
877211f5 427 struct snd_pcm_oss oss;
1da177e4
LT		 428#endif
429};
430
877211f5
TI		 431struct snd_pcm_notify {
432 int (*n_register) (struct snd_pcm * pcm);
433 int (*n_disconnect) (struct snd_pcm * pcm);
434 int (*n_unregister) (struct snd_pcm * pcm);
1da177e4 435 struct list_head list;
877211f5 436};
1da177e4
LT		 437
438/*
439 * Registering
440 */
441
877211f5 442extern struct snd_pcm *snd_pcm_devices[];
2af677fc 443extern struct file_operations snd_pcm_f_ops[2];
1da177e4 444
877211f5 445int snd_pcm_new(struct snd_card *card, char *id, int device,
1da177e4 446 int playback_count, int capture_count,
877211f5
TI		 447 struct snd_pcm **rpcm);
448int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
1da177e4 449
877211f5 450int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
1da177e4
LT		 451
452/*
453 * Native I/O
454 */
455
456extern rwlock_t snd_pcm_link_rwlock;
457
877211f5
TI		 458int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
459int snd_pcm_info_user(struct snd_pcm_substream *substream,
460 struct snd_pcm_info __user *info);
461int snd_pcm_status(struct snd_pcm_substream *substream,
462 struct snd_pcm_status *status);
463int snd_pcm_prepare(struct snd_pcm_substream *substream);
464int snd_pcm_start(struct snd_pcm_substream *substream);
465int snd_pcm_stop(struct snd_pcm_substream *substream, int status);
466int snd_pcm_drain_done(struct snd_pcm_substream *substream);
1da177e4 467#ifdef CONFIG_PM
877211f5
TI		 468int snd_pcm_suspend(struct snd_pcm_substream *substream);
469int snd_pcm_suspend_all(struct snd_pcm *pcm);
1da177e4 470#endif
877211f5
TI		 471int snd_pcm_kernel_playback_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
472int snd_pcm_kernel_capture_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
473int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
474int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct snd_pcm_substream **rsubstream);
475void snd_pcm_release_substream(struct snd_pcm_substream *substream);
1da177e4 476void snd_pcm_vma_notify_data(void *client, void *data);
877211f5 477int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
1da177e4
LT		 478
479#if BITS_PER_LONG >= 64
480
481static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
482{
483 *rem = *n % div;
484 *n /= div;
485}
486
487#elif defined(i386)
488
489static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
490{
491 u_int32_t low, high;
492 low = *n & 0xffffffff;
493 high = *n >> 32;
494 if (high) {
495 u_int32_t high1 = high % div;
496 high /= div;
497 asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
498 *n = (u_int64_t)high << 32 | low;
499 } else {
500 *n = low / div;
501 *rem = low % div;
502 }
503}
504#else
505
506static inline void divl(u_int32_t high, u_int32_t low,
507 u_int32_t div,
508 u_int32_t *q, u_int32_t *r)
509{
510 u_int64_t n = (u_int64_t)high << 32 | low;
511 u_int64_t d = (u_int64_t)div << 31;
512 u_int32_t q1 = 0;
513 int c = 32;
514 while (n > 0xffffffffU) {
515 q1 <<= 1;
516 if (n >= d) {
517 n -= d;
518 q1 |= 1;
519 }
520 d >>= 1;
521 c--;
522 }
523 q1 <<= c;
524 if (n) {
525 low = n;
526 *q = q1 | (low / div);
527 *r = low % div;
528 } else {
529 *r = 0;
530 *q = q1;
531 }
532 return;
533}
534
535static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
536{
537 u_int32_t low, high;
538 low = *n & 0xffffffff;
539 high = *n >> 32;
540 if (high) {
541 u_int32_t high1 = high % div;
542 u_int32_t low1 = low;
543 high /= div;
544 divl(high1, low1, div, &low, rem);
545 *n = (u_int64_t)high << 32 | low;
546 } else {
547 *n = low / div;
548 *rem = low % div;
549 }
550}
551#endif
552
553/*
554 * PCM library
555 */
556
877211f5 557static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
1da177e4
LT		 558{
559 return substream->group != &substream->self_group;
560}
561
877211f5 562static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
1da177e4
LT		 563{
564 read_lock(&snd_pcm_link_rwlock);
565 spin_lock(&substream->self_group.lock);
566}
567
877211f5 568static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
1da177e4
LT		 569{
570 spin_unlock(&substream->self_group.lock);
571 read_unlock(&snd_pcm_link_rwlock);
572}
573
877211f5 574static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
1da177e4
LT		 575{
576 read_lock_irq(&snd_pcm_link_rwlock);
577 spin_lock(&substream->self_group.lock);
578}
579
877211f5 580static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
1da177e4
LT		 581{
582 spin_unlock(&substream->self_group.lock);
583 read_unlock_irq(&snd_pcm_link_rwlock);
584}
585
586#define snd_pcm_stream_lock_irqsave(substream, flags) \
587do { \
588 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
589 spin_lock(&substream->self_group.lock); \
590} while (0)
591
592#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
593do { \
594 spin_unlock(&substream->self_group.lock); \
595 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
596} while (0)
597
598#define snd_pcm_group_for_each(pos, substream) \
599 list_for_each(pos, &substream->group->substreams)
600
601#define snd_pcm_group_substream_entry(pos) \
877211f5 602 list_entry(pos, struct snd_pcm_substream, link_list)
1da177e4 603
877211f5 604static inline int snd_pcm_running(struct snd_pcm_substream *substream)
1da177e4
LT		 605{
606 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
607 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
608 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
609}
610
877211f5 611static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 612{
613 return size * 8 / runtime->sample_bits;
614}
615
877211f5 616static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 617{
618 return size * 8 / runtime->frame_bits;
619}
620
877211f5 621static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
1da177e4
LT		 622{
623 return size * runtime->sample_bits / 8;
624}
625
877211f5 626static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
1da177e4
LT		 627{
628 return size * runtime->frame_bits / 8;
629}
630
877211f5 631static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
1da177e4
LT		 632{
633 return bytes % runtime->byte_align == 0;
634}
635
877211f5 636static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
1da177e4 637{
877211f5 638 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 639 return frames_to_bytes(runtime, runtime->buffer_size);
640}
641
877211f5 642static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
1da177e4 643{
877211f5 644 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 645 return frames_to_bytes(runtime, runtime->period_size);
646}
647
648/*
649 * result is: 0 ... (boundary - 1)
650 */
877211f5 651static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 652{
653 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
654 if (avail < 0)
655 avail += runtime->boundary;
656 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
657 avail -= runtime->boundary;
658 return avail;
659}
660
661/*
662 * result is: 0 ... (boundary - 1)
663 */
877211f5 664static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 665{
666 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
667 if (avail < 0)
668 avail += runtime->boundary;
669 return avail;
670}
671
877211f5 672static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 673{
674 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
675}
676
877211f5 677static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
1da177e4
LT		 678{
679 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
680}
681
682/**
683 * snd_pcm_playback_ready - check whether the playback buffer is available
684 * @substream: the pcm substream instance
685 *
686 * Checks whether enough free space is available on the playback buffer.
687 *
688 * Returns non-zero if available, or zero if not.
689 */
877211f5 690static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
1da177e4 691{
877211f5 692 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 693 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
694}
695
696/**
697 * snd_pcm_capture_ready - check whether the capture buffer is available
698 * @substream: the pcm substream instance
699 *
700 * Checks whether enough capture data is available on the capture buffer.
701 *
702 * Returns non-zero if available, or zero if not.
703 */
877211f5 704static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
1da177e4 705{
877211f5 706 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 707 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
708}
709
710/**
711 * snd_pcm_playback_data - check whether any data exists on the playback buffer
712 * @substream: the pcm substream instance
713 *
714 * Checks whether any data exists on the playback buffer. If stop_threshold
715 * is bigger or equal to boundary, then this function returns always non-zero.
716 *
717 * Returns non-zero if exists, or zero if not.
718 */
877211f5 719static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
1da177e4 720{
877211f5 721 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 722
723 if (runtime->stop_threshold >= runtime->boundary)
724 return 1;
725 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
726}
727
728/**
729 * snd_pcm_playback_empty - check whether the playback buffer is empty
730 * @substream: the pcm substream instance
731 *
732 * Checks whether the playback buffer is empty.
733 *
734 * Returns non-zero if empty, or zero if not.
735 */
877211f5 736static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
1da177e4 737{
877211f5 738 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 739 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
740}
741
742/**
743 * snd_pcm_capture_empty - check whether the capture buffer is empty
744 * @substream: the pcm substream instance
745 *
746 * Checks whether the capture buffer is empty.
747 *
748 * Returns non-zero if empty, or zero if not.
749 */
877211f5 750static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
1da177e4 751{
877211f5 752 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 753 return snd_pcm_capture_avail(runtime) == 0;
754}
755
877211f5
TI		 756static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
757 struct snd_pcm_substream *master)
1da177e4
LT		 758{
759 substream->runtime->trigger_master = master;
760}
761
762static inline int hw_is_mask(int var)
763{
764 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
765 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
766}
767
768static inline int hw_is_interval(int var)
769{
770 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
771 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
772}
773
877211f5 774static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
1da177e4
LT		 775 snd_pcm_hw_param_t var)
776{
777 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
778}
779
877211f5 780static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
1da177e4
LT		 781 snd_pcm_hw_param_t var)
782{
783 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
784}
785
877211f5 786static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 787 snd_pcm_hw_param_t var)
788{
877211f5 789 return (const struct snd_mask *)hw_param_mask((struct snd_pcm_hw_params*) params, var);
1da177e4
LT		 790}
791
877211f5 792static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
1da177e4
LT		 793 snd_pcm_hw_param_t var)
794{
877211f5 795 return (const struct snd_interval *)hw_param_interval((struct snd_pcm_hw_params*) params, var);
1da177e4
LT		 796}
797
798#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
799#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
800#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
801#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
802#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
803#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
804#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
805#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
806#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
807#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
808#define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min
809
810
877211f5
TI		 811int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
812void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
813void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
814void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
815 unsigned int k, struct snd_interval *c);
816void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
817 const struct snd_interval *b, struct snd_interval *c);
818int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask);
819int snd_interval_ratnum(struct snd_interval *i,
820 unsigned int rats_count, struct snd_ratnum *rats,
1da177e4
LT		 821 unsigned int *nump, unsigned int *denp);
822
877211f5
TI		 823void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
824void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
825int snd_pcm_hw_param_near(struct snd_pcm_substream *substream,
826 struct snd_pcm_hw_params *params,
1da177e4
LT		 827 snd_pcm_hw_param_t var,
828 unsigned int val, int *dir);
877211f5
TI		 829int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
830 struct snd_pcm_hw_params *params,
1da177e4
LT		 831 snd_pcm_hw_param_t var,
832 unsigned int val, int dir);
877211f5 833int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 834
877211f5 835int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
1da177e4 836
877211f5
TI		 837int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
838int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
1da177e4 839
877211f5 840int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 841 u_int32_t mask);
877211f5 842int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 843 u_int64_t mask);
877211f5 844int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1da177e4 845 unsigned int min, unsigned int max);
877211f5
TI		 846int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
847int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
1da177e4
LT		 848 unsigned int cond,
849 snd_pcm_hw_param_t var,
877211f5
TI		 850 struct snd_pcm_hw_constraint_list *l);
851int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
1da177e4
LT		 852 unsigned int cond,
853 snd_pcm_hw_param_t var,
877211f5
TI		 854 struct snd_pcm_hw_constraint_ratnums *r);
855int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
1da177e4
LT		 856 unsigned int cond,
857 snd_pcm_hw_param_t var,
877211f5
TI		 858 struct snd_pcm_hw_constraint_ratdens *r);
859int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
1da177e4
LT		 860 unsigned int cond,
861 unsigned int width,
862 unsigned int msbits);
877211f5 863int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
1da177e4
LT		 864 unsigned int cond,
865 snd_pcm_hw_param_t var,
866 unsigned long step);
877211f5 867int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
1da177e4
LT		 868 unsigned int cond,
869 snd_pcm_hw_param_t var);
877211f5 870int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
1da177e4
LT		 871 unsigned int cond,
872 int var,
873 snd_pcm_hw_rule_func_t func, void *private,
874 int dep, ...);
875
876int snd_pcm_format_signed(snd_pcm_format_t format);
877int snd_pcm_format_unsigned(snd_pcm_format_t format);
878int snd_pcm_format_linear(snd_pcm_format_t format);
879int snd_pcm_format_little_endian(snd_pcm_format_t format);
880int snd_pcm_format_big_endian(snd_pcm_format_t format);
1b44c28d
TI		 881#if 0 /* just for DocBook */
882/**
9502dcad
TI		 883 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
884 * @format: the format to check
885 *
886 * Returns 1 if the given PCM format is CPU-endian, 0 if
887 * opposite, or a negative error code if endian not specified.
888 */
8cdfd251 889int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1b44c28d 890#endif /* DocBook */
9502dcad 891#ifdef SNDRV_LITTLE_ENDIAN
9d01a82e 892#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
9502dcad 893#else
9d01a82e 894#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
9502dcad 895#endif
1da177e4
LT		 896int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
897int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
9502dcad 898ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1da177e4
LT		 899const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
900int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
901snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
902const char *snd_pcm_format_name(snd_pcm_format_t format);
903
877211f5
TI		 904void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
905void snd_pcm_set_sync(struct snd_pcm_substream *substream);
906int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
907int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
1da177e4 908 unsigned int cmd, void *arg);
877211f5
TI		 909int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
910int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
911int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
912int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
913int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
914void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
915void snd_pcm_tick_prepare(struct snd_pcm_substream *substream);
916void snd_pcm_tick_set(struct snd_pcm_substream *substream, unsigned long ticks);
917void snd_pcm_tick_elapsed(struct snd_pcm_substream *substream);
918void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
919snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
1da177e4
LT		 920 const void __user *buf,
921 snd_pcm_uframes_t frames);
877211f5 922snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
1da177e4 923 void __user *buf, snd_pcm_uframes_t frames);
877211f5 924snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
1da177e4 925 void __user **bufs, snd_pcm_uframes_t frames);
877211f5 926snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
1da177e4
LT		 927 void __user **bufs, snd_pcm_uframes_t frames);
928
877211f5 929int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
1da177e4 930
877211f5 931static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
1da177e4
LT		 932 struct snd_dma_buffer *bufp)
933{
877211f5 934 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 935 if (bufp) {
936 runtime->dma_buffer_p = bufp;
937 runtime->dma_area = bufp->area;
938 runtime->dma_addr = bufp->addr;
939 runtime->dma_bytes = bufp->bytes;
940 } else {
941 runtime->dma_buffer_p = NULL;
942 runtime->dma_area = NULL;
943 runtime->dma_addr = 0;
944 runtime->dma_bytes = 0;
945 }
946}
947
948/*
949 * Timer interface
950 */
951
877211f5
TI		 952void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
953void snd_pcm_timer_init(struct snd_pcm_substream *substream);
954void snd_pcm_timer_done(struct snd_pcm_substream *substream);
1da177e4
LT		 955
956/*
957 * Memory
958 */
959
877211f5
TI		 960int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
961int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
962int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
1da177e4
LT		 963 int type, struct device *data,
964 size_t size, size_t max);
877211f5 965int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
1da177e4
LT		 966 int type, void *data,
967 size_t size, size_t max);
877211f5
TI		 968int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
969int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
1da177e4
LT		 970
971#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data)
972#define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size)
973#define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
877211f5 974struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset);
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LT		 975
976/* handle mmap counter - PCM mmap callback should handle this counter properly */
977static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
978{
877211f5 979 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1da177e4
LT		 980 atomic_inc(&substream->runtime->mmap_count);
981}
982
983static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
984{
877211f5 985 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1da177e4
LT		 986 atomic_dec(&substream->runtime->mmap_count);
987}
988
989/* mmap for io-memory area */
990#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
991#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
877211f5 992int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
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LT		 993#else
994#define SNDRV_PCM_INFO_MMAP_IOMEM 0
995#define snd_pcm_lib_mmap_iomem NULL
996#endif
997
998static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
999{
1000 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1001}
1002
1003/*
1004 * Misc
1005 */
1006
1007#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1008 (IEC958_AES1_CON_ORIGINAL<<8)|\
1009 (IEC958_AES1_CON_PCM_CODER<<8)|\
1010 (IEC958_AES3_CON_FS_48000<<24))
1011
1012#endif /* __SOUND_PCM_H */
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