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Merge branch 'topic/noncached-mmap' into topic/misc
[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@perex.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 <sound/minors.h>
29 #include <linux/poll.h>
30 #include <linux/mm.h>
31 #include <linux/bitops.h>
32
33 #define snd_pcm_substream_chip(substream) ((substream)->private_data)
34 #define snd_pcm_chip(pcm) ((pcm)->private_data)
35
36 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
37 #include "pcm_oss.h"
38 #endif
39
40 /*
41 * Hardware (lowlevel) section
42 */
43
44 struct snd_pcm_hardware {
45 unsigned int info; /* SNDRV_PCM_INFO_* */
46 u64 formats; /* SNDRV_PCM_FMTBIT_* */
47 unsigned int rates; /* SNDRV_PCM_RATE_* */
48 unsigned int rate_min; /* min rate */
49 unsigned int rate_max; /* max rate */
50 unsigned int channels_min; /* min channels */
51 unsigned int channels_max; /* max channels */
52 size_t buffer_bytes_max; /* max buffer size */
53 size_t period_bytes_min; /* min period size */
54 size_t period_bytes_max; /* max period size */
55 unsigned int periods_min; /* min # of periods */
56 unsigned int periods_max; /* max # of periods */
57 size_t fifo_size; /* fifo size in bytes */
58 };
59
60 struct snd_pcm_substream;
61
62 struct snd_pcm_ops {
63 int (*open)(struct snd_pcm_substream *substream);
64 int (*close)(struct snd_pcm_substream *substream);
65 int (*ioctl)(struct snd_pcm_substream * substream,
66 unsigned int cmd, void *arg);
67 int (*hw_params)(struct snd_pcm_substream *substream,
68 struct snd_pcm_hw_params *params);
69 int (*hw_free)(struct snd_pcm_substream *substream);
70 int (*prepare)(struct snd_pcm_substream *substream);
71 int (*trigger)(struct snd_pcm_substream *substream, int cmd);
72 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
73 int (*copy)(struct snd_pcm_substream *substream, int channel,
74 snd_pcm_uframes_t pos,
75 void __user *buf, snd_pcm_uframes_t count);
76 int (*silence)(struct snd_pcm_substream *substream, int channel,
77 snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
78 struct page *(*page)(struct snd_pcm_substream *substream,
79 unsigned long offset);
80 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
81 int (*ack)(struct snd_pcm_substream *substream);
82 };
83
84 /*
85 *
86 */
87
88 #if defined(CONFIG_SND_DYNAMIC_MINORS)
89 #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2)
90 #else
91 #define SNDRV_PCM_DEVICES 8
92 #endif
93
94 #define SNDRV_PCM_IOCTL1_FALSE ((void *)0)
95 #define SNDRV_PCM_IOCTL1_TRUE ((void *)1)
96
97 #define SNDRV_PCM_IOCTL1_RESET 0
98 #define SNDRV_PCM_IOCTL1_INFO 1
99 #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
100 #define SNDRV_PCM_IOCTL1_GSTATE 3
101 #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4
102
103 #define SNDRV_PCM_TRIGGER_STOP 0
104 #define SNDRV_PCM_TRIGGER_START 1
105 #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
106 #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
107 #define SNDRV_PCM_TRIGGER_SUSPEND 5
108 #define SNDRV_PCM_TRIGGER_RESUME 6
109
110 #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
111
112 /* If you change this don't forget to change rates[] table in pcm_native.c */
113 #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
114 #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
115 #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
116 #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
117 #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
118 #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
119 #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
120 #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
121 #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
122 #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
123 #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
124 #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
125 #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
126
127 #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
128 #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
129
130 #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
131 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
132 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
133 #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
134 #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
135 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
136 #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
137 SNDRV_PCM_RATE_192000)
138 #define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8)
139 #define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8)
140 #define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE)
141 #define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE)
142 #define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE)
143 #define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE)
144 #define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE)
145 #define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE)
146 #define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE)
147 #define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE)
148 #define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE)
149 #define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE)
150 #define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE)
151 #define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE)
152 #define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
153 #define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
154 #define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
155 #define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
156 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
157 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
158 #define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
159 #define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW)
160 #define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
161 #define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG)
162 #define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM)
163 #define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
164 #define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
165 #define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
166 #define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
167 #define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
168 #define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
169 #define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
170 #define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
171 #define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
172 #define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
173 #define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
174 #define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
175 #define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
176
177 #ifdef SNDRV_LITTLE_ENDIAN
178 #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
179 #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
180 #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
181 #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
182 #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
183 #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
184 #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
185 #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
186 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
187 #endif
188 #ifdef SNDRV_BIG_ENDIAN
189 #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
190 #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
191 #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
192 #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
193 #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
194 #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
195 #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
196 #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
197 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
198 #endif
199
200 struct snd_pcm_file {
201 struct snd_pcm_substream *substream;
202 int no_compat_mmap;
203 };
204
205 struct snd_pcm_hw_rule;
206 typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
207 struct snd_pcm_hw_rule *rule);
208
209 struct snd_pcm_hw_rule {
210 unsigned int cond;
211 snd_pcm_hw_rule_func_t func;
212 int var;
213 int deps[4];
214 void *private;
215 };
216
217 struct snd_pcm_hw_constraints {
218 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
219 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
220 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
221 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
222 unsigned int rules_num;
223 unsigned int rules_all;
224 struct snd_pcm_hw_rule *rules;
225 };
226
227 static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
228 snd_pcm_hw_param_t var)
229 {
230 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
231 }
232
233 static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
234 snd_pcm_hw_param_t var)
235 {
236 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
237 }
238
239 struct snd_ratnum {
240 unsigned int num;
241 unsigned int den_min, den_max, den_step;
242 };
243
244 struct snd_ratden {
245 unsigned int num_min, num_max, num_step;
246 unsigned int den;
247 };
248
249 struct snd_pcm_hw_constraint_ratnums {
250 int nrats;
251 struct snd_ratnum *rats;
252 };
253
254 struct snd_pcm_hw_constraint_ratdens {
255 int nrats;
256 struct snd_ratden *rats;
257 };
258
259 struct snd_pcm_hw_constraint_list {
260 unsigned int count;
261 unsigned int *list;
262 unsigned int mask;
263 };
264
265 struct snd_pcm_hwptr_log;
266
267 struct snd_pcm_runtime {
268 /* -- Status -- */
269 struct snd_pcm_substream *trigger_master;
270 struct timespec trigger_tstamp; /* trigger timestamp */
271 int overrange;
272 snd_pcm_uframes_t avail_max;
273 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
274 unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
275 snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */
276
277 /* -- HW params -- */
278 snd_pcm_access_t access; /* access mode */
279 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
280 snd_pcm_subformat_t subformat; /* subformat */
281 unsigned int rate; /* rate in Hz */
282 unsigned int channels; /* channels */
283 snd_pcm_uframes_t period_size; /* period size */
284 unsigned int periods; /* periods */
285 snd_pcm_uframes_t buffer_size; /* buffer size */
286 snd_pcm_uframes_t min_align; /* Min alignment for the format */
287 size_t byte_align;
288 unsigned int frame_bits;
289 unsigned int sample_bits;
290 unsigned int info;
291 unsigned int rate_num;
292 unsigned int rate_den;
293
294 /* -- SW params -- */
295 int tstamp_mode; /* mmap timestamp is updated */
296 unsigned int period_step;
297 snd_pcm_uframes_t start_threshold;
298 snd_pcm_uframes_t stop_threshold;
299 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
300 noise is nearest than this */
301 snd_pcm_uframes_t silence_size; /* Silence filling size */
302 snd_pcm_uframes_t boundary; /* pointers wrap point */
303
304 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
305 snd_pcm_uframes_t silence_filled; /* size filled with silence */
306
307 union snd_pcm_sync_id sync; /* hardware synchronization ID */
308
309 /* -- mmap -- */
310 struct snd_pcm_mmap_status *status;
311 struct snd_pcm_mmap_control *control;
312
313 /* -- locking / scheduling -- */
314 unsigned int twake: 1; /* do transfer (!poll) wakeup */
315 wait_queue_head_t sleep; /* poll sleep */
316 wait_queue_head_t tsleep; /* transfer sleep */
317 struct fasync_struct *fasync;
318
319 /* -- private section -- */
320 void *private_data;
321 void (*private_free)(struct snd_pcm_runtime *runtime);
322
323 /* -- hardware description -- */
324 struct snd_pcm_hardware hw;
325 struct snd_pcm_hw_constraints hw_constraints;
326
327 /* -- interrupt callbacks -- */
328 void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
329 void (*transfer_ack_end)(struct snd_pcm_substream *substream);
330
331 /* -- timer -- */
332 unsigned int timer_resolution; /* timer resolution */
333 int tstamp_type; /* timestamp type */
334
335 /* -- DMA -- */
336 unsigned char *dma_area; /* DMA area */
337 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
338 size_t dma_bytes; /* size of DMA area */
339
340 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
341
342 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
343 /* -- OSS things -- */
344 struct snd_pcm_oss_runtime oss;
345 #endif
346
347 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
348 struct snd_pcm_hwptr_log *hwptr_log;
349 #endif
350 };
351
352 struct snd_pcm_group { /* keep linked substreams */
353 spinlock_t lock;
354 struct list_head substreams;
355 int count;
356 };
357
358 struct pid;
359
360 struct snd_pcm_substream {
361 struct snd_pcm *pcm;
362 struct snd_pcm_str *pstr;
363 void *private_data; /* copied from pcm->private_data */
364 int number;
365 char name[32]; /* substream name */
366 int stream; /* stream (direction) */
367 char latency_id[20]; /* latency identifier */
368 size_t buffer_bytes_max; /* limit ring buffer size */
369 struct snd_dma_buffer dma_buffer;
370 unsigned int dma_buf_id;
371 size_t dma_max;
372 /* -- hardware operations -- */
373 struct snd_pcm_ops *ops;
374 /* -- runtime information -- */
375 struct snd_pcm_runtime *runtime;
376 /* -- timer section -- */
377 struct snd_timer *timer; /* timer */
378 unsigned timer_running: 1; /* time is running */
379 /* -- next substream -- */
380 struct snd_pcm_substream *next;
381 /* -- linked substreams -- */
382 struct list_head link_list; /* linked list member */
383 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
384 struct snd_pcm_group *group; /* pointer to current group */
385 /* -- assigned files -- */
386 void *file;
387 int ref_count;
388 atomic_t mmap_count;
389 unsigned int f_flags;
390 void (*pcm_release)(struct snd_pcm_substream *);
391 struct pid *pid;
392 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
393 /* -- OSS things -- */
394 struct snd_pcm_oss_substream oss;
395 #endif
396 #ifdef CONFIG_SND_VERBOSE_PROCFS
397 struct snd_info_entry *proc_root;
398 struct snd_info_entry *proc_info_entry;
399 struct snd_info_entry *proc_hw_params_entry;
400 struct snd_info_entry *proc_sw_params_entry;
401 struct snd_info_entry *proc_status_entry;
402 struct snd_info_entry *proc_prealloc_entry;
403 struct snd_info_entry *proc_prealloc_max_entry;
404 #endif
405 /* misc flags */
406 unsigned int hw_opened: 1;
407 };
408
409 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
410
411
412 struct snd_pcm_str {
413 int stream; /* stream (direction) */
414 struct snd_pcm *pcm;
415 /* -- substreams -- */
416 unsigned int substream_count;
417 unsigned int substream_opened;
418 struct snd_pcm_substream *substream;
419 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
420 /* -- OSS things -- */
421 struct snd_pcm_oss_stream oss;
422 #endif
423 #ifdef CONFIG_SND_VERBOSE_PROCFS
424 struct snd_info_entry *proc_root;
425 struct snd_info_entry *proc_info_entry;
426 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
427 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
428 struct snd_info_entry *proc_xrun_debug_entry;
429 #endif
430 #endif
431 };
432
433 struct snd_pcm {
434 struct snd_card *card;
435 struct list_head list;
436 int device; /* device number */
437 unsigned int info_flags;
438 unsigned short dev_class;
439 unsigned short dev_subclass;
440 char id[64];
441 char name[80];
442 struct snd_pcm_str streams[2];
443 struct mutex open_mutex;
444 wait_queue_head_t open_wait;
445 void *private_data;
446 void (*private_free) (struct snd_pcm *pcm);
447 struct device *dev; /* actual hw device this belongs to */
448 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
449 struct snd_pcm_oss oss;
450 #endif
451 };
452
453 struct snd_pcm_notify {
454 int (*n_register) (struct snd_pcm * pcm);
455 int (*n_disconnect) (struct snd_pcm * pcm);
456 int (*n_unregister) (struct snd_pcm * pcm);
457 struct list_head list;
458 };
459
460 /*
461 * Registering
462 */
463
464 extern const struct file_operations snd_pcm_f_ops[2];
465
466 int snd_pcm_new(struct snd_card *card, const char *id, int device,
467 int playback_count, int capture_count,
468 struct snd_pcm **rpcm);
469 int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
470
471 int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
472
473 /*
474 * Native I/O
475 */
476
477 extern rwlock_t snd_pcm_link_rwlock;
478
479 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
480 int snd_pcm_info_user(struct snd_pcm_substream *substream,
481 struct snd_pcm_info __user *info);
482 int snd_pcm_status(struct snd_pcm_substream *substream,
483 struct snd_pcm_status *status);
484 int snd_pcm_start(struct snd_pcm_substream *substream);
485 int snd_pcm_stop(struct snd_pcm_substream *substream, int status);
486 int snd_pcm_drain_done(struct snd_pcm_substream *substream);
487 #ifdef CONFIG_PM
488 int snd_pcm_suspend(struct snd_pcm_substream *substream);
489 int snd_pcm_suspend_all(struct snd_pcm *pcm);
490 #endif
491 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
492 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
493 struct snd_pcm_substream **rsubstream);
494 void snd_pcm_release_substream(struct snd_pcm_substream *substream);
495 int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
496 struct snd_pcm_substream **rsubstream);
497 void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
498 void snd_pcm_vma_notify_data(void *client, void *data);
499 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
500
501 /*
502 * PCM library
503 */
504
505 static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
506 {
507 return substream->group != &substream->self_group;
508 }
509
510 static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
511 {
512 read_lock(&snd_pcm_link_rwlock);
513 spin_lock(&substream->self_group.lock);
514 }
515
516 static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
517 {
518 spin_unlock(&substream->self_group.lock);
519 read_unlock(&snd_pcm_link_rwlock);
520 }
521
522 static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
523 {
524 read_lock_irq(&snd_pcm_link_rwlock);
525 spin_lock(&substream->self_group.lock);
526 }
527
528 static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
529 {
530 spin_unlock(&substream->self_group.lock);
531 read_unlock_irq(&snd_pcm_link_rwlock);
532 }
533
534 #define snd_pcm_stream_lock_irqsave(substream, flags) \
535 do { \
536 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
537 spin_lock(&substream->self_group.lock); \
538 } while (0)
539
540 #define snd_pcm_stream_unlock_irqrestore(substream, flags) \
541 do { \
542 spin_unlock(&substream->self_group.lock); \
543 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
544 } while (0)
545
546 #define snd_pcm_group_for_each_entry(s, substream) \
547 list_for_each_entry(s, &substream->group->substreams, link_list)
548
549 static inline int snd_pcm_running(struct snd_pcm_substream *substream)
550 {
551 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
552 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
553 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
554 }
555
556 static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
557 {
558 return size * 8 / runtime->sample_bits;
559 }
560
561 static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
562 {
563 return size * 8 / runtime->frame_bits;
564 }
565
566 static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
567 {
568 return size * runtime->sample_bits / 8;
569 }
570
571 static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
572 {
573 return size * runtime->frame_bits / 8;
574 }
575
576 static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
577 {
578 return bytes % runtime->byte_align == 0;
579 }
580
581 static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
582 {
583 struct snd_pcm_runtime *runtime = substream->runtime;
584 return frames_to_bytes(runtime, runtime->buffer_size);
585 }
586
587 static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
588 {
589 struct snd_pcm_runtime *runtime = substream->runtime;
590 return frames_to_bytes(runtime, runtime->period_size);
591 }
592
593 /*
594 * result is: 0 ... (boundary - 1)
595 */
596 static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
597 {
598 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
599 if (avail < 0)
600 avail += runtime->boundary;
601 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
602 avail -= runtime->boundary;
603 return avail;
604 }
605
606 /*
607 * result is: 0 ... (boundary - 1)
608 */
609 static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
610 {
611 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
612 if (avail < 0)
613 avail += runtime->boundary;
614 return avail;
615 }
616
617 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
618 {
619 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
620 }
621
622 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
623 {
624 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
625 }
626
627 /**
628 * snd_pcm_playback_ready - check whether the playback buffer is available
629 * @substream: the pcm substream instance
630 *
631 * Checks whether enough free space is available on the playback buffer.
632 *
633 * Returns non-zero if available, or zero if not.
634 */
635 static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
636 {
637 struct snd_pcm_runtime *runtime = substream->runtime;
638 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
639 }
640
641 /**
642 * snd_pcm_capture_ready - check whether the capture buffer is available
643 * @substream: the pcm substream instance
644 *
645 * Checks whether enough capture data is available on the capture buffer.
646 *
647 * Returns non-zero if available, or zero if not.
648 */
649 static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
650 {
651 struct snd_pcm_runtime *runtime = substream->runtime;
652 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
653 }
654
655 /**
656 * snd_pcm_playback_data - check whether any data exists on the playback buffer
657 * @substream: the pcm substream instance
658 *
659 * Checks whether any data exists on the playback buffer. If stop_threshold
660 * is bigger or equal to boundary, then this function returns always non-zero.
661 *
662 * Returns non-zero if exists, or zero if not.
663 */
664 static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
665 {
666 struct snd_pcm_runtime *runtime = substream->runtime;
667
668 if (runtime->stop_threshold >= runtime->boundary)
669 return 1;
670 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
671 }
672
673 /**
674 * snd_pcm_playback_empty - check whether the playback buffer is empty
675 * @substream: the pcm substream instance
676 *
677 * Checks whether the playback buffer is empty.
678 *
679 * Returns non-zero if empty, or zero if not.
680 */
681 static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
682 {
683 struct snd_pcm_runtime *runtime = substream->runtime;
684 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
685 }
686
687 /**
688 * snd_pcm_capture_empty - check whether the capture buffer is empty
689 * @substream: the pcm substream instance
690 *
691 * Checks whether the capture buffer is empty.
692 *
693 * Returns non-zero if empty, or zero if not.
694 */
695 static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
696 {
697 struct snd_pcm_runtime *runtime = substream->runtime;
698 return snd_pcm_capture_avail(runtime) == 0;
699 }
700
701 static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
702 struct snd_pcm_substream *master)
703 {
704 substream->runtime->trigger_master = master;
705 }
706
707 static inline int hw_is_mask(int var)
708 {
709 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
710 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
711 }
712
713 static inline int hw_is_interval(int var)
714 {
715 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
716 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
717 }
718
719 static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
720 snd_pcm_hw_param_t var)
721 {
722 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
723 }
724
725 static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
726 snd_pcm_hw_param_t var)
727 {
728 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
729 }
730
731 static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
732 snd_pcm_hw_param_t var)
733 {
734 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
735 }
736
737 static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
738 snd_pcm_hw_param_t var)
739 {
740 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
741 }
742
743 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
744 #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
745 #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
746 #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
747 #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
748 #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
749 #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
750 #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
751 #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
752 #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
753
754
755 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
756 void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
757 void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
758 void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
759 unsigned int k, struct snd_interval *c);
760 void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
761 const struct snd_interval *b, struct snd_interval *c);
762 int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask);
763 int snd_interval_ratnum(struct snd_interval *i,
764 unsigned int rats_count, struct snd_ratnum *rats,
765 unsigned int *nump, unsigned int *denp);
766
767 void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
768 void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
769 int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
770
771 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
772
773 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
774 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
775
776 int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
777 u_int32_t mask);
778 int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
779 u_int64_t mask);
780 int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
781 unsigned int min, unsigned int max);
782 int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
783 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
784 unsigned int cond,
785 snd_pcm_hw_param_t var,
786 struct snd_pcm_hw_constraint_list *l);
787 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
788 unsigned int cond,
789 snd_pcm_hw_param_t var,
790 struct snd_pcm_hw_constraint_ratnums *r);
791 int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
792 unsigned int cond,
793 snd_pcm_hw_param_t var,
794 struct snd_pcm_hw_constraint_ratdens *r);
795 int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
796 unsigned int cond,
797 unsigned int width,
798 unsigned int msbits);
799 int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
800 unsigned int cond,
801 snd_pcm_hw_param_t var,
802 unsigned long step);
803 int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
804 unsigned int cond,
805 snd_pcm_hw_param_t var);
806 int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
807 unsigned int cond,
808 int var,
809 snd_pcm_hw_rule_func_t func, void *private,
810 int dep, ...);
811
812 int snd_pcm_format_signed(snd_pcm_format_t format);
813 int snd_pcm_format_unsigned(snd_pcm_format_t format);
814 int snd_pcm_format_linear(snd_pcm_format_t format);
815 int snd_pcm_format_little_endian(snd_pcm_format_t format);
816 int snd_pcm_format_big_endian(snd_pcm_format_t format);
817 #if 0 /* just for DocBook */
818 /**
819 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
820 * @format: the format to check
821 *
822 * Returns 1 if the given PCM format is CPU-endian, 0 if
823 * opposite, or a negative error code if endian not specified.
824 */
825 int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
826 #endif /* DocBook */
827 #ifdef SNDRV_LITTLE_ENDIAN
828 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
829 #else
830 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
831 #endif
832 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
833 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
834 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
835 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
836 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
837 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
838
839 void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
840 void snd_pcm_set_sync(struct snd_pcm_substream *substream);
841 int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
842 int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
843 unsigned int cmd, void *arg);
844 int snd_pcm_update_state(struct snd_pcm_substream *substream,
845 struct snd_pcm_runtime *runtime);
846 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
847 int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
848 int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
849 int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
850 int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
851 void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
852 void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
853 snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
854 const void __user *buf,
855 snd_pcm_uframes_t frames);
856 snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
857 void __user *buf, snd_pcm_uframes_t frames);
858 snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
859 void __user **bufs, snd_pcm_uframes_t frames);
860 snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
861 void __user **bufs, snd_pcm_uframes_t frames);
862
863 extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
864
865 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
866 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
867
868 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
869 struct snd_dma_buffer *bufp)
870 {
871 struct snd_pcm_runtime *runtime = substream->runtime;
872 if (bufp) {
873 runtime->dma_buffer_p = bufp;
874 runtime->dma_area = bufp->area;
875 runtime->dma_addr = bufp->addr;
876 runtime->dma_bytes = bufp->bytes;
877 } else {
878 runtime->dma_buffer_p = NULL;
879 runtime->dma_area = NULL;
880 runtime->dma_addr = 0;
881 runtime->dma_bytes = 0;
882 }
883 }
884
885 /*
886 * Timer interface
887 */
888
889 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
890 void snd_pcm_timer_init(struct snd_pcm_substream *substream);
891 void snd_pcm_timer_done(struct snd_pcm_substream *substream);
892
893 static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
894 struct timespec *tv)
895 {
896 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
897 do_posix_clock_monotonic_gettime(tv);
898 else
899 getnstimeofday(tv);
900 }
901
902 /*
903 * Memory
904 */
905
906 int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
907 int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
908 int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
909 int type, struct device *data,
910 size_t size, size_t max);
911 int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
912 int type, void *data,
913 size_t size, size_t max);
914 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
915 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
916
917 int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
918 size_t size, gfp_t gfp_flags);
919 int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
920 struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
921 unsigned long offset);
922 #if 0 /* for kernel-doc */
923 /**
924 * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
925 * @substream: the substream to allocate the buffer to
926 * @size: the requested buffer size, in bytes
927 *
928 * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is
929 * contiguous in kernel virtual space, but not in physical memory. Use this
930 * if the buffer is accessed by kernel code but not by device DMA.
931 *
932 * Returns 1 if the buffer was changed, 0 if not changed, or a negative error
933 * code.
934 */
935 static int snd_pcm_lib_alloc_vmalloc_buffer
936 (struct snd_pcm_substream *substream, size_t size);
937 /**
938 * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer
939 * @substream: the substream to allocate the buffer to
940 * @size: the requested buffer size, in bytes
941 *
942 * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses
943 * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory.
944 */
945 static int snd_pcm_lib_alloc_vmalloc_32_buffer
946 (struct snd_pcm_substream *substream, size_t size);
947 #endif
948 #define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \
949 _snd_pcm_lib_alloc_vmalloc_buffer \
950 (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO)
951 #define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \
952 _snd_pcm_lib_alloc_vmalloc_buffer \
953 (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO)
954
955 #ifdef CONFIG_SND_DMA_SGBUF
956 /*
957 * SG-buffer handling
958 */
959 #define snd_pcm_substream_sgbuf(substream) \
960 ((substream)->runtime->dma_buffer_p->private_data)
961
962 static inline dma_addr_t
963 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
964 {
965 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
966 return snd_sgbuf_get_addr(sg, ofs);
967 }
968
969 static inline void *
970 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
971 {
972 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
973 return snd_sgbuf_get_ptr(sg, ofs);
974 }
975
976 struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
977 unsigned long offset);
978 unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
979 unsigned int ofs, unsigned int size);
980
981 #else /* !SND_DMA_SGBUF */
982 /*
983 * fake using a continuous buffer
984 */
985 static inline dma_addr_t
986 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
987 {
988 return substream->runtime->dma_addr + ofs;
989 }
990
991 static inline void *
992 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
993 {
994 return substream->runtime->dma_area + ofs;
995 }
996
997 #define snd_pcm_sgbuf_ops_page NULL
998
999 #define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size)
1000
1001 #endif /* SND_DMA_SGBUF */
1002
1003 /* handle mmap counter - PCM mmap callback should handle this counter properly */
1004 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1005 {
1006 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1007 atomic_inc(&substream->mmap_count);
1008 }
1009
1010 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1011 {
1012 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1013 atomic_dec(&substream->mmap_count);
1014 }
1015
1016 /* mmap for io-memory area */
1017 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1018 #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
1019 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1020 #else
1021 #define SNDRV_PCM_INFO_MMAP_IOMEM 0
1022 #define snd_pcm_lib_mmap_iomem NULL
1023 #endif
1024
1025 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
1026 struct vm_area_struct *area);
1027 #define snd_pcm_lib_mmap_vmalloc snd_pcm_lib_mmap_noncached
1028
1029 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1030 {
1031 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1032 }
1033
1034 /*
1035 * Misc
1036 */
1037
1038 #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1039 (IEC958_AES1_CON_ORIGINAL<<8)|\
1040 (IEC958_AES1_CON_PCM_CODER<<8)|\
1041 (IEC958_AES3_CON_FS_48000<<24))
1042
1043 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1044
1045 const char *snd_pcm_format_name(snd_pcm_format_t format);
1046
1047 #endif /* __SOUND_PCM_H */
Linux kernel - Deliverables
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