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