projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux...
[GitHub/mt8127/android_kernel_alcatel_ttab.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
301 /* -- SW params -- */
302 int tstamp_mode; /* mmap timestamp is updated */
303 unsigned int period_step;
304 snd_pcm_uframes_t start_threshold;
305 snd_pcm_uframes_t stop_threshold;
306 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
307 noise is nearest than this */
308 snd_pcm_uframes_t silence_size; /* Silence filling size */
309 snd_pcm_uframes_t boundary; /* pointers wrap point */
310
311 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
312 snd_pcm_uframes_t silence_filled; /* size filled with silence */
313
314 union snd_pcm_sync_id sync; /* hardware synchronization ID */
315
316 /* -- mmap -- */
317 struct snd_pcm_mmap_status *status;
318 struct snd_pcm_mmap_control *control;
319
320 /* -- locking / scheduling -- */
321 snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */
322 wait_queue_head_t sleep; /* poll sleep */
323 wait_queue_head_t tsleep; /* transfer sleep */
324 struct fasync_struct *fasync;
325
326 /* -- private section -- */
327 void *private_data;
328 void (*private_free)(struct snd_pcm_runtime *runtime);
329
330 /* -- hardware description -- */
331 struct snd_pcm_hardware hw;
332 struct snd_pcm_hw_constraints hw_constraints;
333
334 /* -- interrupt callbacks -- */
335 void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
336 void (*transfer_ack_end)(struct snd_pcm_substream *substream);
337
338 /* -- timer -- */
339 unsigned int timer_resolution; /* timer resolution */
340 int tstamp_type; /* timestamp type */
341
342 /* -- DMA -- */
343 unsigned char *dma_area; /* DMA area */
344 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
345 size_t dma_bytes; /* size of DMA area */
346
347 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
348
349 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
350 /* -- OSS things -- */
351 struct snd_pcm_oss_runtime oss;
352 #endif
353
354 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
355 struct snd_pcm_hwptr_log *hwptr_log;
356 #endif
357 };
358
359 struct snd_pcm_group { /* keep linked substreams */
360 spinlock_t lock;
361 struct list_head substreams;
362 int count;
363 };
364
365 struct pid;
366
367 struct snd_pcm_substream {
368 struct snd_pcm *pcm;
369 struct snd_pcm_str *pstr;
370 void *private_data; /* copied from pcm->private_data */
371 int number;
372 char name[32]; /* substream name */
373 int stream; /* stream (direction) */
374 struct pm_qos_request_list latency_pm_qos_req; /* pm_qos request */
375 size_t buffer_bytes_max; /* limit ring buffer size */
376 struct snd_dma_buffer dma_buffer;
377 unsigned int dma_buf_id;
378 size_t dma_max;
379 /* -- hardware operations -- */
380 struct snd_pcm_ops *ops;
381 /* -- runtime information -- */
382 struct snd_pcm_runtime *runtime;
383 /* -- timer section -- */
384 struct snd_timer *timer; /* timer */
385 unsigned timer_running: 1; /* time is running */
386 /* -- next substream -- */
387 struct snd_pcm_substream *next;
388 /* -- linked substreams -- */
389 struct list_head link_list; /* linked list member */
390 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
391 struct snd_pcm_group *group; /* pointer to current group */
392 /* -- assigned files -- */
393 void *file;
394 int ref_count;
395 atomic_t mmap_count;
396 unsigned int f_flags;
397 void (*pcm_release)(struct snd_pcm_substream *);
398 struct pid *pid;
399 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
400 /* -- OSS things -- */
401 struct snd_pcm_oss_substream oss;
402 #endif
403 #ifdef CONFIG_SND_VERBOSE_PROCFS
404 struct snd_info_entry *proc_root;
405 struct snd_info_entry *proc_info_entry;
406 struct snd_info_entry *proc_hw_params_entry;
407 struct snd_info_entry *proc_sw_params_entry;
408 struct snd_info_entry *proc_status_entry;
409 struct snd_info_entry *proc_prealloc_entry;
410 struct snd_info_entry *proc_prealloc_max_entry;
411 #endif
412 /* misc flags */
413 unsigned int hw_opened: 1;
414 };
415
416 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
417
418
419 struct snd_pcm_str {
420 int stream; /* stream (direction) */
421 struct snd_pcm *pcm;
422 /* -- substreams -- */
423 unsigned int substream_count;
424 unsigned int substream_opened;
425 struct snd_pcm_substream *substream;
426 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
427 /* -- OSS things -- */
428 struct snd_pcm_oss_stream oss;
429 #endif
430 #ifdef CONFIG_SND_VERBOSE_PROCFS
431 struct snd_info_entry *proc_root;
432 struct snd_info_entry *proc_info_entry;
433 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
434 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
435 struct snd_info_entry *proc_xrun_debug_entry;
436 #endif
437 #endif
438 };
439
440 struct snd_pcm {
441 struct snd_card *card;
442 struct list_head list;
443 int device; /* device number */
444 unsigned int info_flags;
445 unsigned short dev_class;
446 unsigned short dev_subclass;
447 char id[64];
448 char name[80];
449 struct snd_pcm_str streams[2];
450 struct mutex open_mutex;
451 wait_queue_head_t open_wait;
452 void *private_data;
453 void (*private_free) (struct snd_pcm *pcm);
454 struct device *dev; /* actual hw device this belongs to */
455 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
456 struct snd_pcm_oss oss;
457 #endif
458 };
459
460 struct snd_pcm_notify {
461 int (*n_register) (struct snd_pcm * pcm);
462 int (*n_disconnect) (struct snd_pcm * pcm);
463 int (*n_unregister) (struct snd_pcm * pcm);
464 struct list_head list;
465 };
466
467 /*
468 * Registering
469 */
470
471 extern const struct file_operations snd_pcm_f_ops[2];
472
473 int snd_pcm_new(struct snd_card *card, const char *id, int device,
474 int playback_count, int capture_count,
475 struct snd_pcm **rpcm);
476 int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
477
478 int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
479
480 /*
481 * Native I/O
482 */
483
484 extern rwlock_t snd_pcm_link_rwlock;
485
486 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
487 int snd_pcm_info_user(struct snd_pcm_substream *substream,
488 struct snd_pcm_info __user *info);
489 int snd_pcm_status(struct snd_pcm_substream *substream,
490 struct snd_pcm_status *status);
491 int snd_pcm_start(struct snd_pcm_substream *substream);
492 int snd_pcm_stop(struct snd_pcm_substream *substream, int status);
493 int snd_pcm_drain_done(struct snd_pcm_substream *substream);
494 #ifdef CONFIG_PM
495 int snd_pcm_suspend(struct snd_pcm_substream *substream);
496 int snd_pcm_suspend_all(struct snd_pcm *pcm);
497 #endif
498 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
499 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
500 struct snd_pcm_substream **rsubstream);
501 void snd_pcm_release_substream(struct snd_pcm_substream *substream);
502 int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
503 struct snd_pcm_substream **rsubstream);
504 void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
505 void snd_pcm_vma_notify_data(void *client, void *data);
506 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
507
508 /*
509 * PCM library
510 */
511
512 static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
513 {
514 return substream->group != &substream->self_group;
515 }
516
517 static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
518 {
519 read_lock(&snd_pcm_link_rwlock);
520 spin_lock(&substream->self_group.lock);
521 }
522
523 static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
524 {
525 spin_unlock(&substream->self_group.lock);
526 read_unlock(&snd_pcm_link_rwlock);
527 }
528
529 static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
530 {
531 read_lock_irq(&snd_pcm_link_rwlock);
532 spin_lock(&substream->self_group.lock);
533 }
534
535 static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
536 {
537 spin_unlock(&substream->self_group.lock);
538 read_unlock_irq(&snd_pcm_link_rwlock);
539 }
540
541 #define snd_pcm_stream_lock_irqsave(substream, flags) \
542 do { \
543 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
544 spin_lock(&substream->self_group.lock); \
545 } while (0)
546
547 #define snd_pcm_stream_unlock_irqrestore(substream, flags) \
548 do { \
549 spin_unlock(&substream->self_group.lock); \
550 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
551 } while (0)
552
553 #define snd_pcm_group_for_each_entry(s, substream) \
554 list_for_each_entry(s, &substream->group->substreams, link_list)
555
556 static inline int snd_pcm_running(struct snd_pcm_substream *substream)
557 {
558 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
559 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
560 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
561 }
562
563 static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
564 {
565 return size * 8 / runtime->sample_bits;
566 }
567
568 static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
569 {
570 return size * 8 / runtime->frame_bits;
571 }
572
573 static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
574 {
575 return size * runtime->sample_bits / 8;
576 }
577
578 static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
579 {
580 return size * runtime->frame_bits / 8;
581 }
582
583 static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
584 {
585 return bytes % runtime->byte_align == 0;
586 }
587
588 static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
589 {
590 struct snd_pcm_runtime *runtime = substream->runtime;
591 return frames_to_bytes(runtime, runtime->buffer_size);
592 }
593
594 static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
595 {
596 struct snd_pcm_runtime *runtime = substream->runtime;
597 return frames_to_bytes(runtime, runtime->period_size);
598 }
599
600 /*
601 * result is: 0 ... (boundary - 1)
602 */
603 static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
604 {
605 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
606 if (avail < 0)
607 avail += runtime->boundary;
608 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
609 avail -= runtime->boundary;
610 return avail;
611 }
612
613 /*
614 * result is: 0 ... (boundary - 1)
615 */
616 static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
617 {
618 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
619 if (avail < 0)
620 avail += runtime->boundary;
621 return avail;
622 }
623
624 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
625 {
626 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
627 }
628
629 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
630 {
631 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
632 }
633
634 /**
635 * snd_pcm_playback_ready - check whether the playback buffer is available
636 * @substream: the pcm substream instance
637 *
638 * Checks whether enough free space is available on the playback buffer.
639 *
640 * Returns non-zero if available, or zero if not.
641 */
642 static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
643 {
644 struct snd_pcm_runtime *runtime = substream->runtime;
645 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
646 }
647
648 /**
649 * snd_pcm_capture_ready - check whether the capture buffer is available
650 * @substream: the pcm substream instance
651 *
652 * Checks whether enough capture data is available on the capture buffer.
653 *
654 * Returns non-zero if available, or zero if not.
655 */
656 static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
657 {
658 struct snd_pcm_runtime *runtime = substream->runtime;
659 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
660 }
661
662 /**
663 * snd_pcm_playback_data - check whether any data exists on the playback buffer
664 * @substream: the pcm substream instance
665 *
666 * Checks whether any data exists on the playback buffer. If stop_threshold
667 * is bigger or equal to boundary, then this function returns always non-zero.
668 *
669 * Returns non-zero if exists, or zero if not.
670 */
671 static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
672 {
673 struct snd_pcm_runtime *runtime = substream->runtime;
674
675 if (runtime->stop_threshold >= runtime->boundary)
676 return 1;
677 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
678 }
679
680 /**
681 * snd_pcm_playback_empty - check whether the playback buffer is empty
682 * @substream: the pcm substream instance
683 *
684 * Checks whether the playback buffer is empty.
685 *
686 * Returns non-zero if empty, or zero if not.
687 */
688 static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
689 {
690 struct snd_pcm_runtime *runtime = substream->runtime;
691 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
692 }
693
694 /**
695 * snd_pcm_capture_empty - check whether the capture buffer is empty
696 * @substream: the pcm substream instance
697 *
698 * Checks whether the capture buffer is empty.
699 *
700 * Returns non-zero if empty, or zero if not.
701 */
702 static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
703 {
704 struct snd_pcm_runtime *runtime = substream->runtime;
705 return snd_pcm_capture_avail(runtime) == 0;
706 }
707
708 static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
709 struct snd_pcm_substream *master)
710 {
711 substream->runtime->trigger_master = master;
712 }
713
714 static inline int hw_is_mask(int var)
715 {
716 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
717 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
718 }
719
720 static inline int hw_is_interval(int var)
721 {
722 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
723 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
724 }
725
726 static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
727 snd_pcm_hw_param_t var)
728 {
729 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
730 }
731
732 static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
733 snd_pcm_hw_param_t var)
734 {
735 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
736 }
737
738 static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
739 snd_pcm_hw_param_t var)
740 {
741 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
742 }
743
744 static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
745 snd_pcm_hw_param_t var)
746 {
747 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
748 }
749
750 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
751 #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
752 #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
753 #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
754 #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
755 #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
756 #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
757 #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
758 #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
759 #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
760
761
762 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
763 void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
764 void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
765 void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
766 unsigned int k, struct snd_interval *c);
767 void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
768 const struct snd_interval *b, struct snd_interval *c);
769 int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask);
770 int snd_interval_ratnum(struct snd_interval *i,
771 unsigned int rats_count, struct snd_ratnum *rats,
772 unsigned int *nump, unsigned int *denp);
773
774 void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
775 void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
776 int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
777
778 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
779
780 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
781 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
782
783 int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
784 u_int32_t mask);
785 int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
786 u_int64_t mask);
787 int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
788 unsigned int min, unsigned int max);
789 int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
790 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
791 unsigned int cond,
792 snd_pcm_hw_param_t var,
793 struct snd_pcm_hw_constraint_list *l);
794 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
795 unsigned int cond,
796 snd_pcm_hw_param_t var,
797 struct snd_pcm_hw_constraint_ratnums *r);
798 int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
799 unsigned int cond,
800 snd_pcm_hw_param_t var,
801 struct snd_pcm_hw_constraint_ratdens *r);
802 int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
803 unsigned int cond,
804 unsigned int width,
805 unsigned int msbits);
806 int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
807 unsigned int cond,
808 snd_pcm_hw_param_t var,
809 unsigned long step);
810 int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
811 unsigned int cond,
812 snd_pcm_hw_param_t var);
813 int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
814 unsigned int cond,
815 int var,
816 snd_pcm_hw_rule_func_t func, void *private,
817 int dep, ...);
818
819 int snd_pcm_format_signed(snd_pcm_format_t format);
820 int snd_pcm_format_unsigned(snd_pcm_format_t format);
821 int snd_pcm_format_linear(snd_pcm_format_t format);
822 int snd_pcm_format_little_endian(snd_pcm_format_t format);
823 int snd_pcm_format_big_endian(snd_pcm_format_t format);
824 #if 0 /* just for DocBook */
825 /**
826 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
827 * @format: the format to check
828 *
829 * Returns 1 if the given PCM format is CPU-endian, 0 if
830 * opposite, or a negative error code if endian not specified.
831 */
832 int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
833 #endif /* DocBook */
834 #ifdef SNDRV_LITTLE_ENDIAN
835 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
836 #else
837 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
838 #endif
839 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
840 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
841 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
842 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
843 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
844 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
845
846 void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
847 void snd_pcm_set_sync(struct snd_pcm_substream *substream);
848 int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
849 int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
850 unsigned int cmd, void *arg);
851 int snd_pcm_update_state(struct snd_pcm_substream *substream,
852 struct snd_pcm_runtime *runtime);
853 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
854 int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
855 int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
856 int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
857 int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
858 void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
859 void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
860 snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
861 const void __user *buf,
862 snd_pcm_uframes_t frames);
863 snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
864 void __user *buf, snd_pcm_uframes_t frames);
865 snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
866 void __user **bufs, snd_pcm_uframes_t frames);
867 snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
868 void __user **bufs, snd_pcm_uframes_t frames);
869
870 extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
871
872 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
873 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
874
875 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
876 struct snd_dma_buffer *bufp)
877 {
878 struct snd_pcm_runtime *runtime = substream->runtime;
879 if (bufp) {
880 runtime->dma_buffer_p = bufp;
881 runtime->dma_area = bufp->area;
882 runtime->dma_addr = bufp->addr;
883 runtime->dma_bytes = bufp->bytes;
884 } else {
885 runtime->dma_buffer_p = NULL;
886 runtime->dma_area = NULL;
887 runtime->dma_addr = 0;
888 runtime->dma_bytes = 0;
889 }
890 }
891
892 /*
893 * Timer interface
894 */
895
896 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
897 void snd_pcm_timer_init(struct snd_pcm_substream *substream);
898 void snd_pcm_timer_done(struct snd_pcm_substream *substream);
899
900 static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
901 struct timespec *tv)
902 {
903 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
904 do_posix_clock_monotonic_gettime(tv);
905 else
906 getnstimeofday(tv);
907 }
908
909 /*
910 * Memory
911 */
912
913 int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
914 int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
915 int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
916 int type, struct device *data,
917 size_t size, size_t max);
918 int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
919 int type, void *data,
920 size_t size, size_t max);
921 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
922 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
923
924 int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
925 size_t size, gfp_t gfp_flags);
926 int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
927 struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
928 unsigned long offset);
929 #if 0 /* for kernel-doc */
930 /**
931 * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
932 * @substream: the substream to allocate the buffer to
933 * @size: the requested buffer size, in bytes
934 *
935 * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is
936 * contiguous in kernel virtual space, but not in physical memory. Use this
937 * if the buffer is accessed by kernel code but not by device DMA.
938 *
939 * Returns 1 if the buffer was changed, 0 if not changed, or a negative error
940 * code.
941 */
942 static int snd_pcm_lib_alloc_vmalloc_buffer
943 (struct snd_pcm_substream *substream, size_t size);
944 /**
945 * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer
946 * @substream: the substream to allocate the buffer to
947 * @size: the requested buffer size, in bytes
948 *
949 * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses
950 * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory.
951 */
952 static int snd_pcm_lib_alloc_vmalloc_32_buffer
953 (struct snd_pcm_substream *substream, size_t size);
954 #endif
955 #define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \
956 _snd_pcm_lib_alloc_vmalloc_buffer \
957 (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO)
958 #define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \
959 _snd_pcm_lib_alloc_vmalloc_buffer \
960 (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO)
961
962 #ifdef CONFIG_SND_DMA_SGBUF
963 /*
964 * SG-buffer handling
965 */
966 #define snd_pcm_substream_sgbuf(substream) \
967 ((substream)->runtime->dma_buffer_p->private_data)
968
969 static inline dma_addr_t
970 snd_pcm_sgbuf_get_addr(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_addr(sg, ofs);
974 }
975
976 static inline void *
977 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
978 {
979 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
980 return snd_sgbuf_get_ptr(sg, ofs);
981 }
982
983 struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
984 unsigned long offset);
985 unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
986 unsigned int ofs, unsigned int size);
987
988 #else /* !SND_DMA_SGBUF */
989 /*
990 * fake using a continuous buffer
991 */
992 static inline dma_addr_t
993 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
994 {
995 return substream->runtime->dma_addr + ofs;
996 }
997
998 static inline void *
999 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
1000 {
1001 return substream->runtime->dma_area + ofs;
1002 }
1003
1004 #define snd_pcm_sgbuf_ops_page NULL
1005
1006 #define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size)
1007
1008 #endif /* SND_DMA_SGBUF */
1009
1010 /* handle mmap counter - PCM mmap callback should handle this counter properly */
1011 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1012 {
1013 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1014 atomic_inc(&substream->mmap_count);
1015 }
1016
1017 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1018 {
1019 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1020 atomic_dec(&substream->mmap_count);
1021 }
1022
1023 /* mmap for io-memory area */
1024 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1025 #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
1026 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1027 #else
1028 #define SNDRV_PCM_INFO_MMAP_IOMEM 0
1029 #define snd_pcm_lib_mmap_iomem NULL
1030 #endif
1031
1032 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
1033 struct vm_area_struct *area);
1034 #define snd_pcm_lib_mmap_vmalloc snd_pcm_lib_mmap_noncached
1035
1036 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1037 {
1038 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1039 }
1040
1041 /*
1042 * Misc
1043 */
1044
1045 #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1046 (IEC958_AES1_CON_ORIGINAL<<8)|\
1047 (IEC958_AES1_CON_PCM_CODER<<8)|\
1048 (IEC958_AES3_CON_FS_48000<<24))
1049
1050 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1051
1052 const char *snd_pcm_format_name(snd_pcm_format_t format);
1053
1054 #endif /* __SOUND_PCM_H */
kernel source for telekom puls (alcatel/mediatek)