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Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[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 #include <linux/pm_qos_params.h>
33
34 #define snd_pcm_substream_chip(substream) ((substream)->private_data)
35 #define snd_pcm_chip(pcm) ((pcm)->private_data)
36
37 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
38 #include "pcm_oss.h"
39 #endif
40
41 /*
42 * Hardware (lowlevel) section
43 */
44
45 struct snd_pcm_hardware {
46 unsigned int info; /* SNDRV_PCM_INFO_* */
47 u64 formats; /* SNDRV_PCM_FMTBIT_* */
48 unsigned int rates; /* SNDRV_PCM_RATE_* */
49 unsigned int rate_min; /* min rate */
50 unsigned int rate_max; /* max rate */
51 unsigned int channels_min; /* min channels */
52 unsigned int channels_max; /* max channels */
53 size_t buffer_bytes_max; /* max buffer size */
54 size_t period_bytes_min; /* min period size */
55 size_t period_bytes_max; /* max period size */
56 unsigned int periods_min; /* min # of periods */
57 unsigned int periods_max; /* max # of periods */
58 size_t fifo_size; /* fifo size in bytes */
59 };
60
61 struct snd_pcm_substream;
62
63 struct snd_pcm_ops {
64 int (*open)(struct snd_pcm_substream *substream);
65 int (*close)(struct snd_pcm_substream *substream);
66 int (*ioctl)(struct snd_pcm_substream * substream,
67 unsigned int cmd, void *arg);
68 int (*hw_params)(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params *params);
70 int (*hw_free)(struct snd_pcm_substream *substream);
71 int (*prepare)(struct snd_pcm_substream *substream);
72 int (*trigger)(struct snd_pcm_substream *substream, int cmd);
73 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
74 int (*copy)(struct snd_pcm_substream *substream, int channel,
75 snd_pcm_uframes_t pos,
76 void __user *buf, snd_pcm_uframes_t count);
77 int (*silence)(struct snd_pcm_substream *substream, int channel,
78 snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
79 struct page *(*page)(struct snd_pcm_substream *substream,
80 unsigned long offset);
81 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
82 int (*ack)(struct snd_pcm_substream *substream);
83 };
84
85 /*
86 *
87 */
88
89 #if defined(CONFIG_SND_DYNAMIC_MINORS)
90 #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2)
91 #else
92 #define SNDRV_PCM_DEVICES 8
93 #endif
94
95 #define SNDRV_PCM_IOCTL1_FALSE ((void *)0)
96 #define SNDRV_PCM_IOCTL1_TRUE ((void *)1)
97
98 #define SNDRV_PCM_IOCTL1_RESET 0
99 #define SNDRV_PCM_IOCTL1_INFO 1
100 #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
101 #define SNDRV_PCM_IOCTL1_GSTATE 3
102 #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4
103
104 #define SNDRV_PCM_TRIGGER_STOP 0
105 #define SNDRV_PCM_TRIGGER_START 1
106 #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
107 #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
108 #define SNDRV_PCM_TRIGGER_SUSPEND 5
109 #define SNDRV_PCM_TRIGGER_RESUME 6
110
111 #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
112
113 /* If you change this don't forget to change rates[] table in pcm_native.c */
114 #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
115 #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
116 #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
117 #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
118 #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
119 #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
120 #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
121 #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
122 #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
123 #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
124 #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
125 #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
126 #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
127
128 #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
129 #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
130
131 #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
132 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
133 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
134 #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
135 #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
136 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
137 #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
138 SNDRV_PCM_RATE_192000)
139 #define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8)
140 #define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8)
141 #define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE)
142 #define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE)
143 #define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE)
144 #define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE)
145 #define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE)
146 #define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE)
147 #define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE)
148 #define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE)
149 #define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE)
150 #define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE)
151 #define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE)
152 #define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE)
153 #define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
154 #define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
155 #define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
156 #define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
157 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
158 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
159 #define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
160 #define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW)
161 #define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
162 #define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG)
163 #define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM)
164 #define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
165 #define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
166 #define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
167 #define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
168 #define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
169 #define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
170 #define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
171 #define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
172 #define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
173 #define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
174 #define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
175 #define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
176 #define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
177 #define SNDRV_PCM_FMTBIT_G723_24 (1ULL << SNDRV_PCM_FORMAT_G723_24)
178 #define SNDRV_PCM_FMTBIT_G723_24_1B (1ULL << SNDRV_PCM_FORMAT_G723_24_1B)
179 #define SNDRV_PCM_FMTBIT_G723_40 (1ULL << SNDRV_PCM_FORMAT_G723_40)
180 #define SNDRV_PCM_FMTBIT_G723_40_1B (1ULL << SNDRV_PCM_FORMAT_G723_40_1B)
181
182 #ifdef SNDRV_LITTLE_ENDIAN
183 #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
184 #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
185 #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
186 #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
187 #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
188 #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
189 #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
190 #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
191 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
192 #endif
193 #ifdef SNDRV_BIG_ENDIAN
194 #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
195 #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
196 #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
197 #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
198 #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
199 #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
200 #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
201 #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
202 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
203 #endif
204
205 struct snd_pcm_file {
206 struct snd_pcm_substream *substream;
207 int no_compat_mmap;
208 };
209
210 struct snd_pcm_hw_rule;
211 typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
212 struct snd_pcm_hw_rule *rule);
213
214 struct snd_pcm_hw_rule {
215 unsigned int cond;
216 snd_pcm_hw_rule_func_t func;
217 int var;
218 int deps[4];
219 void *private;
220 };
221
222 struct snd_pcm_hw_constraints {
223 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
224 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
225 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
226 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
227 unsigned int rules_num;
228 unsigned int rules_all;
229 struct snd_pcm_hw_rule *rules;
230 };
231
232 static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
233 snd_pcm_hw_param_t var)
234 {
235 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
236 }
237
238 static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
239 snd_pcm_hw_param_t var)
240 {
241 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
242 }
243
244 struct snd_ratnum {
245 unsigned int num;
246 unsigned int den_min, den_max, den_step;
247 };
248
249 struct snd_ratden {
250 unsigned int num_min, num_max, num_step;
251 unsigned int den;
252 };
253
254 struct snd_pcm_hw_constraint_ratnums {
255 int nrats;
256 struct snd_ratnum *rats;
257 };
258
259 struct snd_pcm_hw_constraint_ratdens {
260 int nrats;
261 struct snd_ratden *rats;
262 };
263
264 struct snd_pcm_hw_constraint_list {
265 unsigned int count;
266 unsigned int *list;
267 unsigned int mask;
268 };
269
270 struct snd_pcm_hwptr_log;
271
272 struct snd_pcm_runtime {
273 /* -- Status -- */
274 struct snd_pcm_substream *trigger_master;
275 struct timespec trigger_tstamp; /* trigger timestamp */
276 int overrange;
277 snd_pcm_uframes_t avail_max;
278 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
279 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
280 unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
281 unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */
282 snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */
283
284 /* -- HW params -- */
285 snd_pcm_access_t access; /* access mode */
286 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
287 snd_pcm_subformat_t subformat; /* subformat */
288 unsigned int rate; /* rate in Hz */
289 unsigned int channels; /* channels */
290 snd_pcm_uframes_t period_size; /* period size */
291 unsigned int periods; /* periods */
292 snd_pcm_uframes_t buffer_size; /* buffer size */
293 snd_pcm_uframes_t min_align; /* Min alignment for the format */
294 size_t byte_align;
295 unsigned int frame_bits;
296 unsigned int sample_bits;
297 unsigned int info;
298 unsigned int rate_num;
299 unsigned int rate_den;
300 unsigned int no_period_wakeup: 1;
301
302 /* -- SW params -- */
303 int tstamp_mode; /* mmap timestamp is updated */
304 unsigned int period_step;
305 snd_pcm_uframes_t start_threshold;
306 snd_pcm_uframes_t stop_threshold;
307 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
308 noise is nearest than this */
309 snd_pcm_uframes_t silence_size; /* Silence filling size */
310 snd_pcm_uframes_t boundary; /* pointers wrap point */
311
312 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
313 snd_pcm_uframes_t silence_filled; /* size filled with silence */
314
315 union snd_pcm_sync_id sync; /* hardware synchronization ID */
316
317 /* -- mmap -- */
318 struct snd_pcm_mmap_status *status;
319 struct snd_pcm_mmap_control *control;
320
321 /* -- locking / scheduling -- */
322 snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */
323 wait_queue_head_t sleep; /* poll sleep */
324 wait_queue_head_t tsleep; /* transfer sleep */
325 struct fasync_struct *fasync;
326
327 /* -- private section -- */
328 void *private_data;
329 void (*private_free)(struct snd_pcm_runtime *runtime);
330
331 /* -- hardware description -- */
332 struct snd_pcm_hardware hw;
333 struct snd_pcm_hw_constraints hw_constraints;
334
335 /* -- interrupt callbacks -- */
336 void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
337 void (*transfer_ack_end)(struct snd_pcm_substream *substream);
338
339 /* -- timer -- */
340 unsigned int timer_resolution; /* timer resolution */
341 int tstamp_type; /* timestamp type */
342
343 /* -- DMA -- */
344 unsigned char *dma_area; /* DMA area */
345 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
346 size_t dma_bytes; /* size of DMA area */
347
348 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
349
350 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
351 /* -- OSS things -- */
352 struct snd_pcm_oss_runtime oss;
353 #endif
354
355 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
356 struct snd_pcm_hwptr_log *hwptr_log;
357 #endif
358 };
359
360 struct snd_pcm_group { /* keep linked substreams */
361 spinlock_t lock;
362 struct list_head substreams;
363 int count;
364 };
365
366 struct pid;
367
368 struct snd_pcm_substream {
369 struct snd_pcm *pcm;
370 struct snd_pcm_str *pstr;
371 void *private_data; /* copied from pcm->private_data */
372 int number;
373 char name[32]; /* substream name */
374 int stream; /* stream (direction) */
375 struct pm_qos_request_list latency_pm_qos_req; /* pm_qos request */
376 size_t buffer_bytes_max; /* limit ring buffer size */
377 struct snd_dma_buffer dma_buffer;
378 unsigned int dma_buf_id;
379 size_t dma_max;
380 /* -- hardware operations -- */
381 struct snd_pcm_ops *ops;
382 /* -- runtime information -- */
383 struct snd_pcm_runtime *runtime;
384 /* -- timer section -- */
385 struct snd_timer *timer; /* timer */
386 unsigned timer_running: 1; /* time is running */
387 /* -- next substream -- */
388 struct snd_pcm_substream *next;
389 /* -- linked substreams -- */
390 struct list_head link_list; /* linked list member */
391 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
392 struct snd_pcm_group *group; /* pointer to current group */
393 /* -- assigned files -- */
394 void *file;
395 int ref_count;
396 atomic_t mmap_count;
397 unsigned int f_flags;
398 void (*pcm_release)(struct snd_pcm_substream *);
399 struct pid *pid;
400 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
401 /* -- OSS things -- */
402 struct snd_pcm_oss_substream oss;
403 #endif
404 #ifdef CONFIG_SND_VERBOSE_PROCFS
405 struct snd_info_entry *proc_root;
406 struct snd_info_entry *proc_info_entry;
407 struct snd_info_entry *proc_hw_params_entry;
408 struct snd_info_entry *proc_sw_params_entry;
409 struct snd_info_entry *proc_status_entry;
410 struct snd_info_entry *proc_prealloc_entry;
411 struct snd_info_entry *proc_prealloc_max_entry;
412 #endif
413 /* misc flags */
414 unsigned int hw_opened: 1;
415 };
416
417 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
418
419
420 struct snd_pcm_str {
421 int stream; /* stream (direction) */
422 struct snd_pcm *pcm;
423 /* -- substreams -- */
424 unsigned int substream_count;
425 unsigned int substream_opened;
426 struct snd_pcm_substream *substream;
427 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
428 /* -- OSS things -- */
429 struct snd_pcm_oss_stream oss;
430 #endif
431 #ifdef CONFIG_SND_VERBOSE_PROCFS
432 struct snd_info_entry *proc_root;
433 struct snd_info_entry *proc_info_entry;
434 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
435 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
436 struct snd_info_entry *proc_xrun_debug_entry;
437 #endif
438 #endif
439 };
440
441 struct snd_pcm {
442 struct snd_card *card;
443 struct list_head list;
444 int device; /* device number */
445 unsigned int info_flags;
446 unsigned short dev_class;
447 unsigned short dev_subclass;
448 char id[64];
449 char name[80];
450 struct snd_pcm_str streams[2];
451 struct mutex open_mutex;
452 wait_queue_head_t open_wait;
453 void *private_data;
454 void (*private_free) (struct snd_pcm *pcm);
455 struct device *dev; /* actual hw device this belongs to */
456 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
457 struct snd_pcm_oss oss;
458 #endif
459 };
460
461 struct snd_pcm_notify {
462 int (*n_register) (struct snd_pcm * pcm);
463 int (*n_disconnect) (struct snd_pcm * pcm);
464 int (*n_unregister) (struct snd_pcm * pcm);
465 struct list_head list;
466 };
467
468 /*
469 * Registering
470 */
471
472 extern const struct file_operations snd_pcm_f_ops[2];
473
474 int snd_pcm_new(struct snd_card *card, const char *id, int device,
475 int playback_count, int capture_count,
476 struct snd_pcm **rpcm);
477 int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
478
479 int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
480
481 /*
482 * Native I/O
483 */
484
485 extern rwlock_t snd_pcm_link_rwlock;
486
487 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
488 int snd_pcm_info_user(struct snd_pcm_substream *substream,
489 struct snd_pcm_info __user *info);
490 int snd_pcm_status(struct snd_pcm_substream *substream,
491 struct snd_pcm_status *status);
492 int snd_pcm_start(struct snd_pcm_substream *substream);
493 int snd_pcm_stop(struct snd_pcm_substream *substream, int status);
494 int snd_pcm_drain_done(struct snd_pcm_substream *substream);
495 #ifdef CONFIG_PM
496 int snd_pcm_suspend(struct snd_pcm_substream *substream);
497 int snd_pcm_suspend_all(struct snd_pcm *pcm);
498 #endif
499 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
500 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
501 struct snd_pcm_substream **rsubstream);
502 void snd_pcm_release_substream(struct snd_pcm_substream *substream);
503 int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
504 struct snd_pcm_substream **rsubstream);
505 void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
506 void snd_pcm_vma_notify_data(void *client, void *data);
507 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
508
509 /*
510 * PCM library
511 */
512
513 static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
514 {
515 return substream->group != &substream->self_group;
516 }
517
518 static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
519 {
520 read_lock(&snd_pcm_link_rwlock);
521 spin_lock(&substream->self_group.lock);
522 }
523
524 static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
525 {
526 spin_unlock(&substream->self_group.lock);
527 read_unlock(&snd_pcm_link_rwlock);
528 }
529
530 static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
531 {
532 read_lock_irq(&snd_pcm_link_rwlock);
533 spin_lock(&substream->self_group.lock);
534 }
535
536 static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
537 {
538 spin_unlock(&substream->self_group.lock);
539 read_unlock_irq(&snd_pcm_link_rwlock);
540 }
541
542 #define snd_pcm_stream_lock_irqsave(substream, flags) \
543 do { \
544 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
545 spin_lock(&substream->self_group.lock); \
546 } while (0)
547
548 #define snd_pcm_stream_unlock_irqrestore(substream, flags) \
549 do { \
550 spin_unlock(&substream->self_group.lock); \
551 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
552 } while (0)
553
554 #define snd_pcm_group_for_each_entry(s, substream) \
555 list_for_each_entry(s, &substream->group->substreams, link_list)
556
557 static inline int snd_pcm_running(struct snd_pcm_substream *substream)
558 {
559 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
560 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
561 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
562 }
563
564 static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
565 {
566 return size * 8 / runtime->sample_bits;
567 }
568
569 static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
570 {
571 return size * 8 / runtime->frame_bits;
572 }
573
574 static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
575 {
576 return size * runtime->sample_bits / 8;
577 }
578
579 static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
580 {
581 return size * runtime->frame_bits / 8;
582 }
583
584 static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
585 {
586 return bytes % runtime->byte_align == 0;
587 }
588
589 static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
590 {
591 struct snd_pcm_runtime *runtime = substream->runtime;
592 return frames_to_bytes(runtime, runtime->buffer_size);
593 }
594
595 static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
596 {
597 struct snd_pcm_runtime *runtime = substream->runtime;
598 return frames_to_bytes(runtime, runtime->period_size);
599 }
600
601 /*
602 * result is: 0 ... (boundary - 1)
603 */
604 static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
605 {
606 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
607 if (avail < 0)
608 avail += runtime->boundary;
609 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
610 avail -= runtime->boundary;
611 return avail;
612 }
613
614 /*
615 * result is: 0 ... (boundary - 1)
616 */
617 static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
618 {
619 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
620 if (avail < 0)
621 avail += runtime->boundary;
622 return avail;
623 }
624
625 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
626 {
627 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
628 }
629
630 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
631 {
632 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
633 }
634
635 /**
636 * snd_pcm_playback_ready - check whether the playback buffer is available
637 * @substream: the pcm substream instance
638 *
639 * Checks whether enough free space is available on the playback buffer.
640 *
641 * Returns non-zero if available, or zero if not.
642 */
643 static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
644 {
645 struct snd_pcm_runtime *runtime = substream->runtime;
646 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
647 }
648
649 /**
650 * snd_pcm_capture_ready - check whether the capture buffer is available
651 * @substream: the pcm substream instance
652 *
653 * Checks whether enough capture data is available on the capture buffer.
654 *
655 * Returns non-zero if available, or zero if not.
656 */
657 static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
658 {
659 struct snd_pcm_runtime *runtime = substream->runtime;
660 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
661 }
662
663 /**
664 * snd_pcm_playback_data - check whether any data exists on the playback buffer
665 * @substream: the pcm substream instance
666 *
667 * Checks whether any data exists on the playback buffer. If stop_threshold
668 * is bigger or equal to boundary, then this function returns always non-zero.
669 *
670 * Returns non-zero if exists, or zero if not.
671 */
672 static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
673 {
674 struct snd_pcm_runtime *runtime = substream->runtime;
675
676 if (runtime->stop_threshold >= runtime->boundary)
677 return 1;
678 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
679 }
680
681 /**
682 * snd_pcm_playback_empty - check whether the playback buffer is empty
683 * @substream: the pcm substream instance
684 *
685 * Checks whether the playback buffer is empty.
686 *
687 * Returns non-zero if empty, or zero if not.
688 */
689 static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
690 {
691 struct snd_pcm_runtime *runtime = substream->runtime;
692 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
693 }
694
695 /**
696 * snd_pcm_capture_empty - check whether the capture buffer is empty
697 * @substream: the pcm substream instance
698 *
699 * Checks whether the capture buffer is empty.
700 *
701 * Returns non-zero if empty, or zero if not.
702 */
703 static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
704 {
705 struct snd_pcm_runtime *runtime = substream->runtime;
706 return snd_pcm_capture_avail(runtime) == 0;
707 }
708
709 static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
710 struct snd_pcm_substream *master)
711 {
712 substream->runtime->trigger_master = master;
713 }
714
715 static inline int hw_is_mask(int var)
716 {
717 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
718 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
719 }
720
721 static inline int hw_is_interval(int var)
722 {
723 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
724 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
725 }
726
727 static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
728 snd_pcm_hw_param_t var)
729 {
730 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
731 }
732
733 static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
734 snd_pcm_hw_param_t var)
735 {
736 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
737 }
738
739 static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
740 snd_pcm_hw_param_t var)
741 {
742 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
743 }
744
745 static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
746 snd_pcm_hw_param_t var)
747 {
748 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
749 }
750
751 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
752 #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
753 #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
754 #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
755 #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
756 #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
757 #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
758 #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
759 #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
760 #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
761
762
763 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
764 void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
765 void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
766 void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
767 unsigned int k, struct snd_interval *c);
768 void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
769 const struct snd_interval *b, struct snd_interval *c);
770 int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask);
771 int snd_interval_ratnum(struct snd_interval *i,
772 unsigned int rats_count, struct snd_ratnum *rats,
773 unsigned int *nump, unsigned int *denp);
774
775 void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
776 void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
777 int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
778
779 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
780
781 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
782 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
783
784 int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
785 u_int32_t mask);
786 int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
787 u_int64_t mask);
788 int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
789 unsigned int min, unsigned int max);
790 int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
791 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
792 unsigned int cond,
793 snd_pcm_hw_param_t var,
794 struct snd_pcm_hw_constraint_list *l);
795 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
796 unsigned int cond,
797 snd_pcm_hw_param_t var,
798 struct snd_pcm_hw_constraint_ratnums *r);
799 int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
800 unsigned int cond,
801 snd_pcm_hw_param_t var,
802 struct snd_pcm_hw_constraint_ratdens *r);
803 int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
804 unsigned int cond,
805 unsigned int width,
806 unsigned int msbits);
807 int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
808 unsigned int cond,
809 snd_pcm_hw_param_t var,
810 unsigned long step);
811 int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
812 unsigned int cond,
813 snd_pcm_hw_param_t var);
814 int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
815 unsigned int cond,
816 int var,
817 snd_pcm_hw_rule_func_t func, void *private,
818 int dep, ...);
819
820 int snd_pcm_format_signed(snd_pcm_format_t format);
821 int snd_pcm_format_unsigned(snd_pcm_format_t format);
822 int snd_pcm_format_linear(snd_pcm_format_t format);
823 int snd_pcm_format_little_endian(snd_pcm_format_t format);
824 int snd_pcm_format_big_endian(snd_pcm_format_t format);
825 #if 0 /* just for DocBook */
826 /**
827 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
828 * @format: the format to check
829 *
830 * Returns 1 if the given PCM format is CPU-endian, 0 if
831 * opposite, or a negative error code if endian not specified.
832 */
833 int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
834 #endif /* DocBook */
835 #ifdef SNDRV_LITTLE_ENDIAN
836 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
837 #else
838 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
839 #endif
840 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
841 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
842 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
843 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
844 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
845 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
846
847 void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
848 void snd_pcm_set_sync(struct snd_pcm_substream *substream);
849 int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
850 int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
851 unsigned int cmd, void *arg);
852 int snd_pcm_update_state(struct snd_pcm_substream *substream,
853 struct snd_pcm_runtime *runtime);
854 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
855 int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
856 int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
857 int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
858 int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
859 void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
860 void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
861 snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
862 const void __user *buf,
863 snd_pcm_uframes_t frames);
864 snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
865 void __user *buf, snd_pcm_uframes_t frames);
866 snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
867 void __user **bufs, snd_pcm_uframes_t frames);
868 snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
869 void __user **bufs, snd_pcm_uframes_t frames);
870
871 extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
872
873 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
874 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
875
876 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
877 struct snd_dma_buffer *bufp)
878 {
879 struct snd_pcm_runtime *runtime = substream->runtime;
880 if (bufp) {
881 runtime->dma_buffer_p = bufp;
882 runtime->dma_area = bufp->area;
883 runtime->dma_addr = bufp->addr;
884 runtime->dma_bytes = bufp->bytes;
885 } else {
886 runtime->dma_buffer_p = NULL;
887 runtime->dma_area = NULL;
888 runtime->dma_addr = 0;
889 runtime->dma_bytes = 0;
890 }
891 }
892
893 /*
894 * Timer interface
895 */
896
897 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
898 void snd_pcm_timer_init(struct snd_pcm_substream *substream);
899 void snd_pcm_timer_done(struct snd_pcm_substream *substream);
900
901 static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
902 struct timespec *tv)
903 {
904 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
905 do_posix_clock_monotonic_gettime(tv);
906 else
907 getnstimeofday(tv);
908 }
909
910 /*
911 * Memory
912 */
913
914 int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
915 int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
916 int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
917 int type, struct device *data,
918 size_t size, size_t max);
919 int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
920 int type, void *data,
921 size_t size, size_t max);
922 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
923 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
924
925 int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
926 size_t size, gfp_t gfp_flags);
927 int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
928 struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
929 unsigned long offset);
930 #if 0 /* for kernel-doc */
931 /**
932 * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
933 * @substream: the substream to allocate the buffer to
934 * @size: the requested buffer size, in bytes
935 *
936 * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is
937 * contiguous in kernel virtual space, but not in physical memory. Use this
938 * if the buffer is accessed by kernel code but not by device DMA.
939 *
940 * Returns 1 if the buffer was changed, 0 if not changed, or a negative error
941 * code.
942 */
943 static int snd_pcm_lib_alloc_vmalloc_buffer
944 (struct snd_pcm_substream *substream, size_t size);
945 /**
946 * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer
947 * @substream: the substream to allocate the buffer to
948 * @size: the requested buffer size, in bytes
949 *
950 * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses
951 * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory.
952 */
953 static int snd_pcm_lib_alloc_vmalloc_32_buffer
954 (struct snd_pcm_substream *substream, size_t size);
955 #endif
956 #define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \
957 _snd_pcm_lib_alloc_vmalloc_buffer \
958 (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO)
959 #define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \
960 _snd_pcm_lib_alloc_vmalloc_buffer \
961 (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO)
962
963 #ifdef CONFIG_SND_DMA_SGBUF
964 /*
965 * SG-buffer handling
966 */
967 #define snd_pcm_substream_sgbuf(substream) \
968 ((substream)->runtime->dma_buffer_p->private_data)
969
970 static inline dma_addr_t
971 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
972 {
973 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
974 return snd_sgbuf_get_addr(sg, ofs);
975 }
976
977 static inline void *
978 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
979 {
980 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
981 return snd_sgbuf_get_ptr(sg, ofs);
982 }
983
984 struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
985 unsigned long offset);
986 unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
987 unsigned int ofs, unsigned int size);
988
989 #else /* !SND_DMA_SGBUF */
990 /*
991 * fake using a continuous buffer
992 */
993 static inline dma_addr_t
994 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
995 {
996 return substream->runtime->dma_addr + ofs;
997 }
998
999 static inline void *
1000 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
1001 {
1002 return substream->runtime->dma_area + ofs;
1003 }
1004
1005 #define snd_pcm_sgbuf_ops_page NULL
1006
1007 #define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size)
1008
1009 #endif /* SND_DMA_SGBUF */
1010
1011 /* handle mmap counter - PCM mmap callback should handle this counter properly */
1012 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1013 {
1014 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1015 atomic_inc(&substream->mmap_count);
1016 }
1017
1018 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1019 {
1020 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1021 atomic_dec(&substream->mmap_count);
1022 }
1023
1024 /* mmap for io-memory area */
1025 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1026 #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
1027 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1028 #else
1029 #define SNDRV_PCM_INFO_MMAP_IOMEM 0
1030 #define snd_pcm_lib_mmap_iomem NULL
1031 #endif
1032
1033 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
1034 struct vm_area_struct *area);
1035 #define snd_pcm_lib_mmap_vmalloc snd_pcm_lib_mmap_noncached
1036
1037 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1038 {
1039 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1040 }
1041
1042 /*
1043 * Misc
1044 */
1045
1046 #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1047 (IEC958_AES1_CON_ORIGINAL<<8)|\
1048 (IEC958_AES1_CON_PCM_CODER<<8)|\
1049 (IEC958_AES3_CON_FS_48000<<24))
1050
1051 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1052
1053 const char *snd_pcm_format_name(snd_pcm_format_t format);
1054
1055 #endif /* __SOUND_PCM_H */
Linux kernel - Deliverables
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