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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.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 <sound/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 (*wall_clock)(struct snd_pcm_substream *substream, |
75 | struct timespec *audio_ts); |
76 | int (*copy)(struct snd_pcm_substream *substream, int channel, |
77 | snd_pcm_uframes_t pos, |
78 | void __user *buf, snd_pcm_uframes_t count); |
79 | int (*silence)(struct snd_pcm_substream *substream, int channel, |
80 | snd_pcm_uframes_t pos, snd_pcm_uframes_t count); |
81 | struct page *(*page)(struct snd_pcm_substream *substream, |
82 | unsigned long offset); |
83 | int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); |
84 | int (*ack)(struct snd_pcm_substream *substream); |
85 | }; |
86 | |
87 | /* |
88 | * |
89 | */ |
90 | |
91 | #if defined(CONFIG_SND_DYNAMIC_MINORS) |
92 | #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2) |
93 | #else |
94 | #define SNDRV_PCM_DEVICES 8 |
95 | #endif |
96 | |
97 | #define SNDRV_PCM_IOCTL1_FALSE ((void *)0) |
98 | #define SNDRV_PCM_IOCTL1_TRUE ((void *)1) |
99 | |
100 | #define SNDRV_PCM_IOCTL1_RESET 0 |
101 | #define SNDRV_PCM_IOCTL1_INFO 1 |
102 | #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 |
103 | #define SNDRV_PCM_IOCTL1_GSTATE 3 |
104 | #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 |
105 | |
106 | #define SNDRV_PCM_TRIGGER_STOP 0 |
107 | #define SNDRV_PCM_TRIGGER_START 1 |
108 | #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 |
109 | #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 |
110 | #define SNDRV_PCM_TRIGGER_SUSPEND 5 |
111 | #define SNDRV_PCM_TRIGGER_RESUME 6 |
112 | |
113 | #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) |
114 | |
115 | /* If you change this don't forget to change rates[] table in pcm_native.c */ |
116 | #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ |
117 | #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ |
118 | #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ |
119 | #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ |
120 | #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ |
121 | #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ |
122 | #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ |
123 | #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ |
124 | #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ |
125 | #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ |
126 | #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ |
127 | #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ |
128 | #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ |
129 | |
130 | #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ |
131 | #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ |
132 | |
133 | #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ |
134 | SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ |
135 | SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) |
136 | #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) |
137 | #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ |
138 | SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) |
139 | #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ |
140 | SNDRV_PCM_RATE_192000) |
141 | #define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt) |
142 | #define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8) |
143 | #define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8) |
144 | #define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE) |
145 | #define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE) |
146 | #define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE) |
147 | #define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE) |
148 | #define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE) |
149 | #define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE) |
150 | #define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE) |
151 | #define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE) |
152 | #define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE) |
153 | #define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE) |
154 | #define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE) |
155 | #define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE) |
156 | #define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE) |
157 | #define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE) |
158 | #define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE) |
159 | #define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE) |
160 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE) |
161 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE) |
162 | #define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW) |
163 | #define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW) |
164 | #define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM) |
165 | #define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG) |
166 | #define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM) |
167 | #define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL) |
168 | #define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE) |
169 | #define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE) |
170 | #define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE) |
171 | #define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE) |
172 | #define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE) |
173 | #define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE) |
174 | #define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE) |
175 | #define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE) |
176 | #define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE) |
177 | #define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE) |
178 | #define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE) |
179 | #define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE) |
180 | #define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24) |
181 | #define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B) |
182 | #define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40) |
183 | #define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B) |
184 | #define SNDRV_PCM_FMTBIT_DSD_U8 _SNDRV_PCM_FMTBIT(DSD_U8) |
185 | #define SNDRV_PCM_FMTBIT_DSD_U16_LE _SNDRV_PCM_FMTBIT(DSD_U16_LE) |
186 | |
187 | #ifdef SNDRV_LITTLE_ENDIAN |
188 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE |
189 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE |
190 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE |
191 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE |
192 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE |
193 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE |
194 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE |
195 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE |
196 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE |
197 | #endif |
198 | #ifdef SNDRV_BIG_ENDIAN |
199 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE |
200 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE |
201 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE |
202 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE |
203 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE |
204 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE |
205 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE |
206 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE |
207 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE |
208 | #endif |
209 | |
210 | struct snd_pcm_file { |
211 | struct snd_pcm_substream *substream; |
212 | int no_compat_mmap; |
213 | }; |
214 | |
215 | struct snd_pcm_hw_rule; |
216 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, |
217 | struct snd_pcm_hw_rule *rule); |
218 | |
219 | struct snd_pcm_hw_rule { |
220 | unsigned int cond; |
221 | snd_pcm_hw_rule_func_t func; |
222 | int var; |
223 | int deps[4]; |
224 | void *private; |
225 | }; |
226 | |
227 | struct snd_pcm_hw_constraints { |
228 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - |
229 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
230 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
231 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
232 | unsigned int rules_num; |
233 | unsigned int rules_all; |
234 | struct snd_pcm_hw_rule *rules; |
235 | }; |
236 | |
237 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
238 | snd_pcm_hw_param_t var) |
239 | { |
240 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
241 | } |
242 | |
243 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
244 | snd_pcm_hw_param_t var) |
245 | { |
246 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
247 | } |
248 | |
249 | struct snd_ratnum { |
250 | unsigned int num; |
251 | unsigned int den_min, den_max, den_step; |
252 | }; |
253 | |
254 | struct snd_ratden { |
255 | unsigned int num_min, num_max, num_step; |
256 | unsigned int den; |
257 | }; |
258 | |
259 | struct snd_pcm_hw_constraint_ratnums { |
260 | int nrats; |
261 | struct snd_ratnum *rats; |
262 | }; |
263 | |
264 | struct snd_pcm_hw_constraint_ratdens { |
265 | int nrats; |
266 | struct snd_ratden *rats; |
267 | }; |
268 | |
269 | struct snd_pcm_hw_constraint_list { |
270 | unsigned int count; |
271 | const unsigned int *list; |
272 | unsigned int mask; |
273 | }; |
274 | |
275 | struct snd_pcm_hwptr_log; |
276 | |
277 | struct snd_pcm_runtime { |
278 | /* -- Status -- */ |
279 | struct snd_pcm_substream *trigger_master; |
280 | struct timespec trigger_tstamp; /* trigger timestamp */ |
281 | int overrange; |
282 | snd_pcm_uframes_t avail_max; |
283 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ |
284 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ |
285 | unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ |
286 | unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ |
287 | snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ |
288 | u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */ |
289 | |
290 | /* -- HW params -- */ |
291 | snd_pcm_access_t access; /* access mode */ |
292 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ |
293 | snd_pcm_subformat_t subformat; /* subformat */ |
294 | unsigned int rate; /* rate in Hz */ |
295 | unsigned int channels; /* channels */ |
296 | snd_pcm_uframes_t period_size; /* period size */ |
297 | unsigned int periods; /* periods */ |
298 | snd_pcm_uframes_t buffer_size; /* buffer size */ |
299 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ |
300 | size_t byte_align; |
301 | unsigned int frame_bits; |
302 | unsigned int sample_bits; |
303 | unsigned int info; |
304 | unsigned int rate_num; |
305 | unsigned int rate_den; |
306 | unsigned int no_period_wakeup: 1; |
307 | |
308 | /* -- SW params -- */ |
309 | int tstamp_mode; /* mmap timestamp is updated */ |
310 | unsigned int period_step; |
311 | snd_pcm_uframes_t start_threshold; |
312 | snd_pcm_uframes_t stop_threshold; |
313 | snd_pcm_uframes_t silence_threshold; /* Silence filling happens when |
314 | noise is nearest than this */ |
315 | snd_pcm_uframes_t silence_size; /* Silence filling size */ |
316 | snd_pcm_uframes_t boundary; /* pointers wrap point */ |
317 | |
318 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ |
319 | snd_pcm_uframes_t silence_filled; /* size filled with silence */ |
320 | |
321 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ |
322 | |
323 | /* -- mmap -- */ |
324 | struct snd_pcm_mmap_status *status; |
325 | struct snd_pcm_mmap_control *control; |
326 | |
327 | /* -- locking / scheduling -- */ |
328 | snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ |
329 | wait_queue_head_t sleep; /* poll sleep */ |
330 | wait_queue_head_t tsleep; /* transfer sleep */ |
331 | struct fasync_struct *fasync; |
332 | |
333 | /* -- private section -- */ |
334 | void *private_data; |
335 | void (*private_free)(struct snd_pcm_runtime *runtime); |
336 | |
337 | /* -- hardware description -- */ |
338 | struct snd_pcm_hardware hw; |
339 | struct snd_pcm_hw_constraints hw_constraints; |
340 | |
341 | /* -- interrupt callbacks -- */ |
342 | void (*transfer_ack_begin)(struct snd_pcm_substream *substream); |
343 | void (*transfer_ack_end)(struct snd_pcm_substream *substream); |
344 | |
345 | /* -- timer -- */ |
346 | unsigned int timer_resolution; /* timer resolution */ |
347 | int tstamp_type; /* timestamp type */ |
348 | |
349 | /* -- DMA -- */ |
350 | unsigned char *dma_area; /* DMA area */ |
351 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ |
352 | size_t dma_bytes; /* size of DMA area */ |
353 | |
354 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ |
355 | |
356 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
357 | /* -- OSS things -- */ |
358 | struct snd_pcm_oss_runtime oss; |
359 | #endif |
360 | |
361 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
362 | struct snd_pcm_hwptr_log *hwptr_log; |
363 | #endif |
364 | }; |
365 | |
366 | struct snd_pcm_group { /* keep linked substreams */ |
367 | spinlock_t lock; |
368 | struct list_head substreams; |
369 | int count; |
370 | }; |
371 | |
372 | struct pid; |
373 | |
374 | struct snd_pcm_substream { |
375 | struct snd_pcm *pcm; |
376 | struct snd_pcm_str *pstr; |
377 | void *private_data; /* copied from pcm->private_data */ |
378 | int number; |
379 | char name[32]; /* substream name */ |
380 | int stream; /* stream (direction) */ |
381 | struct pm_qos_request latency_pm_qos_req; /* pm_qos request */ |
382 | size_t buffer_bytes_max; /* limit ring buffer size */ |
383 | struct snd_dma_buffer dma_buffer; |
384 | unsigned int dma_buf_id; |
385 | size_t dma_max; |
386 | /* -- hardware operations -- */ |
387 | const struct snd_pcm_ops *ops; |
388 | /* -- runtime information -- */ |
389 | struct snd_pcm_runtime *runtime; |
390 | /* -- timer section -- */ |
391 | struct snd_timer *timer; /* timer */ |
392 | unsigned timer_running: 1; /* time is running */ |
393 | /* -- next substream -- */ |
394 | struct snd_pcm_substream *next; |
395 | /* -- linked substreams -- */ |
396 | struct list_head link_list; /* linked list member */ |
397 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ |
398 | struct snd_pcm_group *group; /* pointer to current group */ |
399 | /* -- assigned files -- */ |
400 | void *file; |
401 | int ref_count; |
402 | atomic_t mmap_count; |
403 | unsigned int f_flags; |
404 | void (*pcm_release)(struct snd_pcm_substream *); |
405 | struct pid *pid; |
406 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
407 | /* -- OSS things -- */ |
408 | struct snd_pcm_oss_substream oss; |
409 | #endif |
410 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
411 | struct snd_info_entry *proc_root; |
412 | struct snd_info_entry *proc_info_entry; |
413 | struct snd_info_entry *proc_hw_params_entry; |
414 | struct snd_info_entry *proc_sw_params_entry; |
415 | struct snd_info_entry *proc_status_entry; |
416 | struct snd_info_entry *proc_prealloc_entry; |
417 | struct snd_info_entry *proc_prealloc_max_entry; |
418 | #endif |
419 | /* misc flags */ |
420 | unsigned int hw_opened: 1; |
421 | }; |
422 | |
423 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
424 | |
425 | |
426 | struct snd_pcm_str { |
427 | int stream; /* stream (direction) */ |
428 | struct snd_pcm *pcm; |
429 | /* -- substreams -- */ |
430 | unsigned int substream_count; |
431 | unsigned int substream_opened; |
432 | struct snd_pcm_substream *substream; |
433 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
434 | /* -- OSS things -- */ |
435 | struct snd_pcm_oss_stream oss; |
436 | #endif |
437 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
438 | struct snd_info_entry *proc_root; |
439 | struct snd_info_entry *proc_info_entry; |
440 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
441 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ |
442 | struct snd_info_entry *proc_xrun_debug_entry; |
443 | #endif |
444 | #endif |
445 | struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */ |
446 | }; |
447 | |
448 | struct snd_pcm { |
449 | struct snd_card *card; |
450 | struct list_head list; |
451 | int device; /* device number */ |
452 | unsigned int info_flags; |
453 | unsigned short dev_class; |
454 | unsigned short dev_subclass; |
455 | char id[64]; |
456 | char name[80]; |
457 | struct snd_pcm_str streams[2]; |
458 | struct mutex open_mutex; |
459 | wait_queue_head_t open_wait; |
460 | void *private_data; |
461 | void (*private_free) (struct snd_pcm *pcm); |
462 | struct device *dev; /* actual hw device this belongs to */ |
463 | bool internal; /* pcm is for internal use only */ |
464 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
465 | struct snd_pcm_oss oss; |
466 | #endif |
467 | }; |
468 | |
469 | struct snd_pcm_notify { |
470 | int (*n_register) (struct snd_pcm * pcm); |
471 | int (*n_disconnect) (struct snd_pcm * pcm); |
472 | int (*n_unregister) (struct snd_pcm * pcm); |
473 | struct list_head list; |
474 | }; |
475 | |
476 | /* |
477 | * Registering |
478 | */ |
479 | |
480 | extern const struct file_operations snd_pcm_f_ops[2]; |
481 | |
482 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
483 | int playback_count, int capture_count, |
484 | struct snd_pcm **rpcm); |
485 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, |
486 | int playback_count, int capture_count, |
487 | struct snd_pcm **rpcm); |
488 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); |
489 | |
490 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
491 | |
492 | /* |
493 | * Native I/O |
494 | */ |
495 | |
496 | extern rwlock_t snd_pcm_link_rwlock; |
497 | |
498 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
499 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
500 | struct snd_pcm_info __user *info); |
501 | int snd_pcm_status(struct snd_pcm_substream *substream, |
502 | struct snd_pcm_status *status); |
503 | int snd_pcm_start(struct snd_pcm_substream *substream); |
504 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status); |
505 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); |
506 | #ifdef CONFIG_PM |
507 | int snd_pcm_suspend(struct snd_pcm_substream *substream); |
508 | int snd_pcm_suspend_all(struct snd_pcm *pcm); |
509 | #endif |
510 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); |
511 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, |
512 | struct snd_pcm_substream **rsubstream); |
513 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); |
514 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, |
515 | struct snd_pcm_substream **rsubstream); |
516 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); |
517 | void snd_pcm_vma_notify_data(void *client, void *data); |
518 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); |
519 | |
520 | |
521 | #ifdef CONFIG_SND_DEBUG |
522 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, |
523 | char *name, size_t len); |
524 | #else |
525 | static inline void |
526 | snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size) |
527 | { |
528 | *buf = 0; |
529 | } |
530 | #endif |
531 | |
532 | /* |
533 | * PCM library |
534 | */ |
535 | |
536 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) |
537 | { |
538 | return substream->group != &substream->self_group; |
539 | } |
540 | |
541 | static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
542 | { |
543 | read_lock(&snd_pcm_link_rwlock); |
544 | spin_lock(&substream->self_group.lock); |
545 | } |
546 | |
547 | static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
548 | { |
549 | spin_unlock(&substream->self_group.lock); |
550 | read_unlock(&snd_pcm_link_rwlock); |
551 | } |
552 | |
553 | static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
554 | { |
555 | read_lock_irq(&snd_pcm_link_rwlock); |
556 | spin_lock(&substream->self_group.lock); |
557 | } |
558 | |
559 | static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
560 | { |
561 | spin_unlock(&substream->self_group.lock); |
562 | read_unlock_irq(&snd_pcm_link_rwlock); |
563 | } |
564 | |
565 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ |
566 | do { \ |
567 | read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ |
568 | spin_lock(&substream->self_group.lock); \ |
569 | } while (0) |
570 | |
571 | #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ |
572 | do { \ |
573 | spin_unlock(&substream->self_group.lock); \ |
574 | read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ |
575 | } while (0) |
576 | |
577 | #define snd_pcm_group_for_each_entry(s, substream) \ |
578 | list_for_each_entry(s, &substream->group->substreams, link_list) |
579 | |
580 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
581 | { |
582 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || |
583 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && |
584 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); |
585 | } |
586 | |
587 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
588 | { |
589 | return size * 8 / runtime->sample_bits; |
590 | } |
591 | |
592 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
593 | { |
594 | return size * 8 / runtime->frame_bits; |
595 | } |
596 | |
597 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
598 | { |
599 | return size * runtime->sample_bits / 8; |
600 | } |
601 | |
602 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
603 | { |
604 | return size * runtime->frame_bits / 8; |
605 | } |
606 | |
607 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
608 | { |
609 | return bytes % runtime->byte_align == 0; |
610 | } |
611 | |
612 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
613 | { |
614 | struct snd_pcm_runtime *runtime = substream->runtime; |
615 | return frames_to_bytes(runtime, runtime->buffer_size); |
616 | } |
617 | |
618 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
619 | { |
620 | struct snd_pcm_runtime *runtime = substream->runtime; |
621 | return frames_to_bytes(runtime, runtime->period_size); |
622 | } |
623 | |
624 | /* |
625 | * result is: 0 ... (boundary - 1) |
626 | */ |
627 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
628 | { |
629 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; |
630 | if (avail < 0) |
631 | avail += runtime->boundary; |
632 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) |
633 | avail -= runtime->boundary; |
634 | return avail; |
635 | } |
636 | |
637 | /* |
638 | * result is: 0 ... (boundary - 1) |
639 | */ |
640 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
641 | { |
642 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; |
643 | if (avail < 0) |
644 | avail += runtime->boundary; |
645 | return avail; |
646 | } |
647 | |
648 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
649 | { |
650 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); |
651 | } |
652 | |
653 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
654 | { |
655 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); |
656 | } |
657 | |
658 | /** |
659 | * snd_pcm_playback_ready - check whether the playback buffer is available |
660 | * @substream: the pcm substream instance |
661 | * |
662 | * Checks whether enough free space is available on the playback buffer. |
663 | * |
664 | * Return: Non-zero if available, or zero if not. |
665 | */ |
666 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
667 | { |
668 | struct snd_pcm_runtime *runtime = substream->runtime; |
669 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
670 | } |
671 | |
672 | /** |
673 | * snd_pcm_capture_ready - check whether the capture buffer is available |
674 | * @substream: the pcm substream instance |
675 | * |
676 | * Checks whether enough capture data is available on the capture buffer. |
677 | * |
678 | * Return: Non-zero if available, or zero if not. |
679 | */ |
680 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
681 | { |
682 | struct snd_pcm_runtime *runtime = substream->runtime; |
683 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
684 | } |
685 | |
686 | /** |
687 | * snd_pcm_playback_data - check whether any data exists on the playback buffer |
688 | * @substream: the pcm substream instance |
689 | * |
690 | * Checks whether any data exists on the playback buffer. |
691 | * |
692 | * Return: Non-zero if any data exists, or zero if not. If stop_threshold |
693 | * is bigger or equal to boundary, then this function returns always non-zero. |
694 | */ |
695 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
696 | { |
697 | struct snd_pcm_runtime *runtime = substream->runtime; |
698 | |
699 | if (runtime->stop_threshold >= runtime->boundary) |
700 | return 1; |
701 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; |
702 | } |
703 | |
704 | /** |
705 | * snd_pcm_playback_empty - check whether the playback buffer is empty |
706 | * @substream: the pcm substream instance |
707 | * |
708 | * Checks whether the playback buffer is empty. |
709 | * |
710 | * Return: Non-zero if empty, or zero if not. |
711 | */ |
712 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
713 | { |
714 | struct snd_pcm_runtime *runtime = substream->runtime; |
715 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
716 | } |
717 | |
718 | /** |
719 | * snd_pcm_capture_empty - check whether the capture buffer is empty |
720 | * @substream: the pcm substream instance |
721 | * |
722 | * Checks whether the capture buffer is empty. |
723 | * |
724 | * Return: Non-zero if empty, or zero if not. |
725 | */ |
726 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
727 | { |
728 | struct snd_pcm_runtime *runtime = substream->runtime; |
729 | return snd_pcm_capture_avail(runtime) == 0; |
730 | } |
731 | |
732 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
733 | struct snd_pcm_substream *master) |
734 | { |
735 | substream->runtime->trigger_master = master; |
736 | } |
737 | |
738 | static inline int hw_is_mask(int var) |
739 | { |
740 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && |
741 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; |
742 | } |
743 | |
744 | static inline int hw_is_interval(int var) |
745 | { |
746 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && |
747 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; |
748 | } |
749 | |
750 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
751 | snd_pcm_hw_param_t var) |
752 | { |
753 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
754 | } |
755 | |
756 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
757 | snd_pcm_hw_param_t var) |
758 | { |
759 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
760 | } |
761 | |
762 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
763 | snd_pcm_hw_param_t var) |
764 | { |
765 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
766 | } |
767 | |
768 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
769 | snd_pcm_hw_param_t var) |
770 | { |
771 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
772 | } |
773 | |
774 | #define params_channels(p) \ |
775 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min) |
776 | #define params_rate(p) \ |
777 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_RATE)->min) |
778 | #define params_period_size(p) \ |
779 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min) |
780 | #define params_periods(p) \ |
781 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIODS)->min) |
782 | #define params_buffer_size(p) \ |
783 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min) |
784 | #define params_buffer_bytes(p) \ |
785 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min) |
786 | |
787 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
788 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); |
789 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); |
790 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
791 | unsigned int k, struct snd_interval *c); |
792 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
793 | const struct snd_interval *b, struct snd_interval *c); |
794 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
795 | const unsigned int *list, unsigned int mask); |
796 | int snd_interval_ratnum(struct snd_interval *i, |
797 | unsigned int rats_count, struct snd_ratnum *rats, |
798 | unsigned int *nump, unsigned int *denp); |
799 | |
800 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
801 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); |
802 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
803 | |
804 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
805 | |
806 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
807 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); |
808 | |
809 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
810 | u_int32_t mask); |
811 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
812 | u_int64_t mask); |
813 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
814 | unsigned int min, unsigned int max); |
815 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
816 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
817 | unsigned int cond, |
818 | snd_pcm_hw_param_t var, |
819 | const struct snd_pcm_hw_constraint_list *l); |
820 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
821 | unsigned int cond, |
822 | snd_pcm_hw_param_t var, |
823 | struct snd_pcm_hw_constraint_ratnums *r); |
824 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
825 | unsigned int cond, |
826 | snd_pcm_hw_param_t var, |
827 | struct snd_pcm_hw_constraint_ratdens *r); |
828 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
829 | unsigned int cond, |
830 | unsigned int width, |
831 | unsigned int msbits); |
832 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
833 | unsigned int cond, |
834 | snd_pcm_hw_param_t var, |
835 | unsigned long step); |
836 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
837 | unsigned int cond, |
838 | snd_pcm_hw_param_t var); |
839 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, |
840 | unsigned int base_rate); |
841 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
842 | unsigned int cond, |
843 | int var, |
844 | snd_pcm_hw_rule_func_t func, void *private, |
845 | int dep, ...); |
846 | |
847 | int snd_pcm_format_signed(snd_pcm_format_t format); |
848 | int snd_pcm_format_unsigned(snd_pcm_format_t format); |
849 | int snd_pcm_format_linear(snd_pcm_format_t format); |
850 | int snd_pcm_format_little_endian(snd_pcm_format_t format); |
851 | int snd_pcm_format_big_endian(snd_pcm_format_t format); |
852 | #if 0 /* just for DocBook */ |
853 | /** |
854 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
855 | * @format: the format to check |
856 | * |
857 | * Return: 1 if the given PCM format is CPU-endian, 0 if |
858 | * opposite, or a negative error code if endian not specified. |
859 | */ |
860 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
861 | #endif /* DocBook */ |
862 | #ifdef SNDRV_LITTLE_ENDIAN |
863 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
864 | #else |
865 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
866 | #endif |
867 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
868 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ |
869 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
870 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
871 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); |
872 | snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsigned, int big_endian); |
873 | |
874 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, |
875 | const struct snd_pcm_ops *ops); |
876 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); |
877 | int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); |
878 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
879 | unsigned int cmd, void *arg); |
880 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
881 | struct snd_pcm_runtime *runtime); |
882 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
883 | int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); |
884 | int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); |
885 | int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); |
886 | int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); |
887 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); |
888 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); |
889 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, |
890 | const void __user *buf, |
891 | snd_pcm_uframes_t frames); |
892 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
893 | void __user *buf, snd_pcm_uframes_t frames); |
894 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
895 | void __user **bufs, snd_pcm_uframes_t frames); |
896 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
897 | void __user **bufs, snd_pcm_uframes_t frames); |
898 | |
899 | extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; |
900 | |
901 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
902 | unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); |
903 | unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); |
904 | |
905 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
906 | struct snd_dma_buffer *bufp) |
907 | { |
908 | struct snd_pcm_runtime *runtime = substream->runtime; |
909 | if (bufp) { |
910 | runtime->dma_buffer_p = bufp; |
911 | runtime->dma_area = bufp->area; |
912 | runtime->dma_addr = bufp->addr; |
913 | runtime->dma_bytes = bufp->bytes; |
914 | } else { |
915 | runtime->dma_buffer_p = NULL; |
916 | runtime->dma_area = NULL; |
917 | runtime->dma_addr = 0; |
918 | runtime->dma_bytes = 0; |
919 | } |
920 | } |
921 | |
922 | /* |
923 | * Timer interface |
924 | */ |
925 | |
926 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
927 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); |
928 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); |
929 | |
930 | static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, |
931 | struct timespec *tv) |
932 | { |
933 | if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) |
934 | do_posix_clock_monotonic_gettime(tv); |
935 | else |
936 | getnstimeofday(tv); |
937 | } |
938 | |
939 | /* |
940 | * Memory |
941 | */ |
942 | |
943 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
944 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); |
945 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, |
946 | int type, struct device *data, |
947 | size_t size, size_t max); |
948 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
949 | int type, void *data, |
950 | size_t size, size_t max); |
951 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
952 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); |
953 | |
954 | int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, |
955 | size_t size, gfp_t gfp_flags); |
956 | int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); |
957 | struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, |
958 | unsigned long offset); |
959 | #if 0 /* for kernel-doc */ |
960 | /** |
961 | * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer |
962 | * @substream: the substream to allocate the buffer to |
963 | * @size: the requested buffer size, in bytes |
964 | * |
965 | * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is |
966 | * contiguous in kernel virtual space, but not in physical memory. Use this |
967 | * if the buffer is accessed by kernel code but not by device DMA. |
968 | * |
969 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error |
970 | * code. |
971 | */ |
972 | static int snd_pcm_lib_alloc_vmalloc_buffer |
973 | (struct snd_pcm_substream *substream, size_t size); |
974 | /** |
975 | * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer |
976 | * @substream: the substream to allocate the buffer to |
977 | * @size: the requested buffer size, in bytes |
978 | * |
979 | * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses |
980 | * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. |
981 | * |
982 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error |
983 | * code. |
984 | */ |
985 | static int snd_pcm_lib_alloc_vmalloc_32_buffer |
986 | (struct snd_pcm_substream *substream, size_t size); |
987 | #endif |
988 | #define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \ |
989 | _snd_pcm_lib_alloc_vmalloc_buffer \ |
990 | (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO) |
991 | #define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \ |
992 | _snd_pcm_lib_alloc_vmalloc_buffer \ |
993 | (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO) |
994 | |
995 | #define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p) |
996 | |
997 | #ifdef CONFIG_SND_DMA_SGBUF |
998 | /* |
999 | * SG-buffer handling |
1000 | */ |
1001 | #define snd_pcm_substream_sgbuf(substream) \ |
1002 | snd_pcm_get_dma_buf(substream)->private_data |
1003 | |
1004 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, |
1005 | unsigned long offset); |
1006 | #else /* !SND_DMA_SGBUF */ |
1007 | /* |
1008 | * fake using a continuous buffer |
1009 | */ |
1010 | #define snd_pcm_sgbuf_ops_page NULL |
1011 | #endif /* SND_DMA_SGBUF */ |
1012 | |
1013 | static inline dma_addr_t |
1014 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) |
1015 | { |
1016 | return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs); |
1017 | } |
1018 | |
1019 | static inline void * |
1020 | snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) |
1021 | { |
1022 | return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs); |
1023 | } |
1024 | |
1025 | static inline unsigned int |
1026 | snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, |
1027 | unsigned int ofs, unsigned int size) |
1028 | { |
1029 | return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size); |
1030 | } |
1031 | |
1032 | /* handle mmap counter - PCM mmap callback should handle this counter properly */ |
1033 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) |
1034 | { |
1035 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
1036 | atomic_inc(&substream->mmap_count); |
1037 | } |
1038 | |
1039 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) |
1040 | { |
1041 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
1042 | atomic_dec(&substream->mmap_count); |
1043 | } |
1044 | |
1045 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
1046 | struct vm_area_struct *area); |
1047 | /* mmap for io-memory area */ |
1048 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) |
1049 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP |
1050 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
1051 | #else |
1052 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 |
1053 | #define snd_pcm_lib_mmap_iomem NULL |
1054 | #endif |
1055 | |
1056 | #define snd_pcm_lib_mmap_vmalloc NULL |
1057 | |
1058 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) |
1059 | { |
1060 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; |
1061 | } |
1062 | |
1063 | /* |
1064 | * Misc |
1065 | */ |
1066 | |
1067 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ |
1068 | (IEC958_AES1_CON_ORIGINAL<<8)|\ |
1069 | (IEC958_AES1_CON_PCM_CODER<<8)|\ |
1070 | (IEC958_AES3_CON_FS_48000<<24)) |
1071 | |
1072 | #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) |
1073 | |
1074 | const char *snd_pcm_format_name(snd_pcm_format_t format); |
1075 | |
1076 | /** |
1077 | * snd_pcm_stream_str - Get a string naming the direction of a stream |
1078 | * @substream: the pcm substream instance |
1079 | * |
1080 | * Return: A string naming the direction of the stream. |
1081 | */ |
1082 | static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream) |
1083 | { |
1084 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
1085 | return "Playback"; |
1086 | else |
1087 | return "Capture"; |
1088 | } |
1089 | |
1090 | /* |
1091 | * PCM channel-mapping control API |
1092 | */ |
1093 | /* array element of channel maps */ |
1094 | struct snd_pcm_chmap_elem { |
1095 | unsigned char channels; |
1096 | unsigned char map[15]; |
1097 | }; |
1098 | |
1099 | /* channel map information; retrieved via snd_kcontrol_chip() */ |
1100 | struct snd_pcm_chmap { |
1101 | struct snd_pcm *pcm; /* assigned PCM instance */ |
1102 | int stream; /* PLAYBACK or CAPTURE */ |
1103 | struct snd_kcontrol *kctl; |
1104 | const struct snd_pcm_chmap_elem *chmap; |
1105 | unsigned int max_channels; |
1106 | unsigned int channel_mask; /* optional: active channels bitmask */ |
1107 | void *private_data; /* optional: private data pointer */ |
1108 | }; |
1109 | |
1110 | /* get the PCM substream assigned to the given chmap info */ |
1111 | static inline struct snd_pcm_substream * |
1112 | snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) |
1113 | { |
1114 | struct snd_pcm_substream *s; |
1115 | for (s = info->pcm->streams[info->stream].substream; s; s = s->next) |
1116 | if (s->number == idx) |
1117 | return s; |
1118 | return NULL; |
1119 | } |
1120 | |
1121 | /* ALSA-standard channel maps (RL/RR prior to C/LFE) */ |
1122 | extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[]; |
1123 | /* Other world's standard channel maps (C/LFE prior to RL/RR) */ |
1124 | extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[]; |
1125 | |
1126 | /* bit masks to be passed to snd_pcm_chmap.channel_mask field */ |
1127 | #define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4)) |
1128 | #define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6)) |
1129 | #define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8)) |
1130 | |
1131 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, |
1132 | const struct snd_pcm_chmap_elem *chmap, |
1133 | int max_channels, |
1134 | unsigned long private_value, |
1135 | struct snd_pcm_chmap **info_ret); |
1136 | |
1137 | /* Strong-typed conversion of pcm_format to bitwise */ |
1138 | static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) |
1139 | { |
1140 | return 1ULL << (__force int) pcm_format; |
1141 | } |
1142 | |
1143 | #endif /* __SOUND_PCM_H */ |
1144 |
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