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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_audio_tstamp_config; /* definitions further down */ | |
64 | struct snd_pcm_audio_tstamp_report; | |
65 | ||
66 | struct snd_pcm_ops { | |
67 | int (*open)(struct snd_pcm_substream *substream); | |
68 | int (*close)(struct snd_pcm_substream *substream); | |
69 | int (*ioctl)(struct snd_pcm_substream * substream, | |
70 | unsigned int cmd, void *arg); | |
71 | int (*hw_params)(struct snd_pcm_substream *substream, | |
72 | struct snd_pcm_hw_params *params); | |
73 | int (*hw_free)(struct snd_pcm_substream *substream); | |
74 | int (*prepare)(struct snd_pcm_substream *substream); | |
75 | int (*trigger)(struct snd_pcm_substream *substream, int cmd); | |
76 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); | |
77 | int (*get_time_info)(struct snd_pcm_substream *substream, | |
78 | struct timespec *system_ts, struct timespec *audio_ts, | |
79 | struct snd_pcm_audio_tstamp_config *audio_tstamp_config, | |
80 | struct snd_pcm_audio_tstamp_report *audio_tstamp_report); | |
81 | int (*copy)(struct snd_pcm_substream *substream, int channel, | |
82 | snd_pcm_uframes_t pos, | |
83 | void __user *buf, snd_pcm_uframes_t count); | |
84 | int (*silence)(struct snd_pcm_substream *substream, int channel, | |
85 | snd_pcm_uframes_t pos, snd_pcm_uframes_t count); | |
86 | struct page *(*page)(struct snd_pcm_substream *substream, | |
87 | unsigned long offset); | |
88 | int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); | |
89 | int (*ack)(struct snd_pcm_substream *substream); | |
90 | }; | |
91 | ||
92 | /* | |
93 | * | |
94 | */ | |
95 | ||
96 | #if defined(CONFIG_SND_DYNAMIC_MINORS) | |
97 | #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2) | |
98 | #else | |
99 | #define SNDRV_PCM_DEVICES 8 | |
100 | #endif | |
101 | ||
102 | #define SNDRV_PCM_IOCTL1_RESET 0 | |
103 | #define SNDRV_PCM_IOCTL1_INFO 1 | |
104 | #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 | |
105 | #define SNDRV_PCM_IOCTL1_GSTATE 3 | |
106 | #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 | |
107 | ||
108 | #define SNDRV_PCM_TRIGGER_STOP 0 | |
109 | #define SNDRV_PCM_TRIGGER_START 1 | |
110 | #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 | |
111 | #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 | |
112 | #define SNDRV_PCM_TRIGGER_SUSPEND 5 | |
113 | #define SNDRV_PCM_TRIGGER_RESUME 6 | |
114 | #define SNDRV_PCM_TRIGGER_DRAIN 7 | |
115 | ||
116 | #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) | |
117 | ||
118 | /* If you change this don't forget to change rates[] table in pcm_native.c */ | |
119 | #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ | |
120 | #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ | |
121 | #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ | |
122 | #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ | |
123 | #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ | |
124 | #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ | |
125 | #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ | |
126 | #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ | |
127 | #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ | |
128 | #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ | |
129 | #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ | |
130 | #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ | |
131 | #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ | |
132 | ||
133 | #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ | |
134 | #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ | |
135 | ||
136 | #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ | |
137 | SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ | |
138 | SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) | |
139 | #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) | |
140 | #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ | |
141 | SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) | |
142 | #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ | |
143 | SNDRV_PCM_RATE_192000) | |
144 | #define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt) | |
145 | #define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8) | |
146 | #define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8) | |
147 | #define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE) | |
148 | #define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE) | |
149 | #define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE) | |
150 | #define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE) | |
151 | #define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE) | |
152 | #define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE) | |
153 | #define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE) | |
154 | #define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE) | |
155 | #define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE) | |
156 | #define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE) | |
157 | #define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE) | |
158 | #define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE) | |
159 | #define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE) | |
160 | #define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE) | |
161 | #define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE) | |
162 | #define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE) | |
163 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE) | |
164 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE) | |
165 | #define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW) | |
166 | #define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW) | |
167 | #define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM) | |
168 | #define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG) | |
169 | #define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM) | |
170 | #define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL) | |
171 | #define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE) | |
172 | #define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE) | |
173 | #define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE) | |
174 | #define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE) | |
175 | #define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE) | |
176 | #define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE) | |
177 | #define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE) | |
178 | #define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE) | |
179 | #define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE) | |
180 | #define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE) | |
181 | #define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE) | |
182 | #define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE) | |
183 | #define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24) | |
184 | #define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B) | |
185 | #define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40) | |
186 | #define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B) | |
187 | #define SNDRV_PCM_FMTBIT_DSD_U8 _SNDRV_PCM_FMTBIT(DSD_U8) | |
188 | #define SNDRV_PCM_FMTBIT_DSD_U16_LE _SNDRV_PCM_FMTBIT(DSD_U16_LE) | |
189 | #define SNDRV_PCM_FMTBIT_DSD_U32_LE _SNDRV_PCM_FMTBIT(DSD_U32_LE) | |
190 | #define SNDRV_PCM_FMTBIT_DSD_U16_BE _SNDRV_PCM_FMTBIT(DSD_U16_BE) | |
191 | #define SNDRV_PCM_FMTBIT_DSD_U32_BE _SNDRV_PCM_FMTBIT(DSD_U32_BE) | |
192 | ||
193 | #ifdef SNDRV_LITTLE_ENDIAN | |
194 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE | |
195 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE | |
196 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE | |
197 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE | |
198 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE | |
199 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE | |
200 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE | |
201 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE | |
202 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | |
203 | #endif | |
204 | #ifdef SNDRV_BIG_ENDIAN | |
205 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE | |
206 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE | |
207 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE | |
208 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE | |
209 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE | |
210 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE | |
211 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE | |
212 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE | |
213 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE | |
214 | #endif | |
215 | ||
216 | struct snd_pcm_file { | |
217 | struct snd_pcm_substream *substream; | |
218 | int no_compat_mmap; | |
219 | }; | |
220 | ||
221 | struct snd_pcm_hw_rule; | |
222 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, | |
223 | struct snd_pcm_hw_rule *rule); | |
224 | ||
225 | struct snd_pcm_hw_rule { | |
226 | unsigned int cond; | |
227 | int var; | |
228 | int deps[4]; | |
229 | ||
230 | snd_pcm_hw_rule_func_t func; | |
231 | void *private; | |
232 | }; | |
233 | ||
234 | struct snd_pcm_hw_constraints { | |
235 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - | |
236 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; | |
237 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - | |
238 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; | |
239 | unsigned int rules_num; | |
240 | unsigned int rules_all; | |
241 | struct snd_pcm_hw_rule *rules; | |
242 | }; | |
243 | ||
244 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, | |
245 | snd_pcm_hw_param_t var) | |
246 | { | |
247 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
248 | } | |
249 | ||
250 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, | |
251 | snd_pcm_hw_param_t var) | |
252 | { | |
253 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
254 | } | |
255 | ||
256 | struct snd_ratnum { | |
257 | unsigned int num; | |
258 | unsigned int den_min, den_max, den_step; | |
259 | }; | |
260 | ||
261 | struct snd_ratden { | |
262 | unsigned int num_min, num_max, num_step; | |
263 | unsigned int den; | |
264 | }; | |
265 | ||
266 | struct snd_pcm_hw_constraint_ratnums { | |
267 | int nrats; | |
268 | const struct snd_ratnum *rats; | |
269 | }; | |
270 | ||
271 | struct snd_pcm_hw_constraint_ratdens { | |
272 | int nrats; | |
273 | const struct snd_ratden *rats; | |
274 | }; | |
275 | ||
276 | struct snd_pcm_hw_constraint_list { | |
277 | const unsigned int *list; | |
278 | unsigned int count; | |
279 | unsigned int mask; | |
280 | }; | |
281 | ||
282 | struct snd_pcm_hw_constraint_ranges { | |
283 | unsigned int count; | |
284 | const struct snd_interval *ranges; | |
285 | unsigned int mask; | |
286 | }; | |
287 | ||
288 | /* | |
289 | * userspace-provided audio timestamp config to kernel, | |
290 | * structure is for internal use only and filled with dedicated unpack routine | |
291 | */ | |
292 | struct snd_pcm_audio_tstamp_config { | |
293 | /* 5 of max 16 bits used */ | |
294 | u32 type_requested:4; | |
295 | u32 report_delay:1; /* add total delay to A/D or D/A */ | |
296 | }; | |
297 | ||
298 | static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data, | |
299 | struct snd_pcm_audio_tstamp_config *config) | |
300 | { | |
301 | config->type_requested = data & 0xF; | |
302 | config->report_delay = (data >> 4) & 1; | |
303 | } | |
304 | ||
305 | /* | |
306 | * kernel-provided audio timestamp report to user-space | |
307 | * structure is for internal use only and read by dedicated pack routine | |
308 | */ | |
309 | struct snd_pcm_audio_tstamp_report { | |
310 | /* 6 of max 16 bits used for bit-fields */ | |
311 | ||
312 | /* for backwards compatibility */ | |
313 | u32 valid:1; | |
314 | ||
315 | /* actual type if hardware could not support requested timestamp */ | |
316 | u32 actual_type:4; | |
317 | ||
318 | /* accuracy represented in ns units */ | |
319 | u32 accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */ | |
320 | u32 accuracy; /* up to 4.29s, will be packed in separate field */ | |
321 | }; | |
322 | ||
323 | static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy, | |
324 | const struct snd_pcm_audio_tstamp_report *report) | |
325 | { | |
326 | u32 tmp; | |
327 | ||
328 | tmp = report->accuracy_report; | |
329 | tmp <<= 4; | |
330 | tmp |= report->actual_type; | |
331 | tmp <<= 1; | |
332 | tmp |= report->valid; | |
333 | ||
334 | *data &= 0xffff; /* zero-clear MSBs */ | |
335 | *data |= (tmp << 16); | |
336 | *accuracy = report->accuracy; | |
337 | } | |
338 | ||
339 | ||
340 | struct snd_pcm_runtime { | |
341 | /* -- Status -- */ | |
342 | struct snd_pcm_substream *trigger_master; | |
343 | struct timespec trigger_tstamp; /* trigger timestamp */ | |
344 | bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */ | |
345 | int overrange; | |
346 | snd_pcm_uframes_t avail_max; | |
347 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ | |
348 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ | |
349 | unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ | |
350 | unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ | |
351 | snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ | |
352 | u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */ | |
353 | ||
354 | /* -- HW params -- */ | |
355 | snd_pcm_access_t access; /* access mode */ | |
356 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ | |
357 | snd_pcm_subformat_t subformat; /* subformat */ | |
358 | unsigned int rate; /* rate in Hz */ | |
359 | unsigned int channels; /* channels */ | |
360 | snd_pcm_uframes_t period_size; /* period size */ | |
361 | unsigned int periods; /* periods */ | |
362 | snd_pcm_uframes_t buffer_size; /* buffer size */ | |
363 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ | |
364 | size_t byte_align; | |
365 | unsigned int frame_bits; | |
366 | unsigned int sample_bits; | |
367 | unsigned int info; | |
368 | unsigned int rate_num; | |
369 | unsigned int rate_den; | |
370 | unsigned int no_period_wakeup: 1; | |
371 | ||
372 | /* -- SW params -- */ | |
373 | int tstamp_mode; /* mmap timestamp is updated */ | |
374 | unsigned int period_step; | |
375 | snd_pcm_uframes_t start_threshold; | |
376 | snd_pcm_uframes_t stop_threshold; | |
377 | snd_pcm_uframes_t silence_threshold; /* Silence filling happens when | |
378 | noise is nearest than this */ | |
379 | snd_pcm_uframes_t silence_size; /* Silence filling size */ | |
380 | snd_pcm_uframes_t boundary; /* pointers wrap point */ | |
381 | ||
382 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ | |
383 | snd_pcm_uframes_t silence_filled; /* size filled with silence */ | |
384 | ||
385 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ | |
386 | ||
387 | /* -- mmap -- */ | |
388 | struct snd_pcm_mmap_status *status; | |
389 | struct snd_pcm_mmap_control *control; | |
390 | ||
391 | /* -- locking / scheduling -- */ | |
392 | snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ | |
393 | wait_queue_head_t sleep; /* poll sleep */ | |
394 | wait_queue_head_t tsleep; /* transfer sleep */ | |
395 | struct fasync_struct *fasync; | |
396 | ||
397 | /* -- private section -- */ | |
398 | void *private_data; | |
399 | void (*private_free)(struct snd_pcm_runtime *runtime); | |
400 | ||
401 | /* -- hardware description -- */ | |
402 | struct snd_pcm_hardware hw; | |
403 | struct snd_pcm_hw_constraints hw_constraints; | |
404 | ||
405 | /* -- timer -- */ | |
406 | unsigned int timer_resolution; /* timer resolution */ | |
407 | int tstamp_type; /* timestamp type */ | |
408 | ||
409 | /* -- DMA -- */ | |
410 | unsigned char *dma_area; /* DMA area */ | |
411 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ | |
412 | size_t dma_bytes; /* size of DMA area */ | |
413 | ||
414 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ | |
415 | ||
416 | /* -- audio timestamp config -- */ | |
417 | struct snd_pcm_audio_tstamp_config audio_tstamp_config; | |
418 | struct snd_pcm_audio_tstamp_report audio_tstamp_report; | |
419 | struct timespec driver_tstamp; | |
420 | ||
421 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
422 | /* -- OSS things -- */ | |
423 | struct snd_pcm_oss_runtime oss; | |
424 | #endif | |
425 | }; | |
426 | ||
427 | struct snd_pcm_group { /* keep linked substreams */ | |
428 | spinlock_t lock; | |
429 | struct mutex mutex; | |
430 | struct list_head substreams; | |
431 | int count; | |
432 | }; | |
433 | ||
434 | struct pid; | |
435 | ||
436 | struct snd_pcm_substream { | |
437 | struct snd_pcm *pcm; | |
438 | struct snd_pcm_str *pstr; | |
439 | void *private_data; /* copied from pcm->private_data */ | |
440 | int number; | |
441 | char name[32]; /* substream name */ | |
442 | int stream; /* stream (direction) */ | |
443 | struct pm_qos_request latency_pm_qos_req; /* pm_qos request */ | |
444 | size_t buffer_bytes_max; /* limit ring buffer size */ | |
445 | struct snd_dma_buffer dma_buffer; | |
446 | size_t dma_max; | |
447 | /* -- hardware operations -- */ | |
448 | const struct snd_pcm_ops *ops; | |
449 | /* -- runtime information -- */ | |
450 | struct snd_pcm_runtime *runtime; | |
451 | /* -- timer section -- */ | |
452 | struct snd_timer *timer; /* timer */ | |
453 | unsigned timer_running: 1; /* time is running */ | |
454 | /* -- next substream -- */ | |
455 | struct snd_pcm_substream *next; | |
456 | /* -- linked substreams -- */ | |
457 | struct list_head link_list; /* linked list member */ | |
458 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ | |
459 | struct snd_pcm_group *group; /* pointer to current group */ | |
460 | /* -- assigned files -- */ | |
461 | void *file; | |
462 | int ref_count; | |
463 | atomic_t mmap_count; | |
464 | unsigned int f_flags; | |
465 | void (*pcm_release)(struct snd_pcm_substream *); | |
466 | struct pid *pid; | |
467 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
468 | /* -- OSS things -- */ | |
469 | struct snd_pcm_oss_substream oss; | |
470 | #endif | |
471 | #ifdef CONFIG_SND_VERBOSE_PROCFS | |
472 | struct snd_info_entry *proc_root; | |
473 | struct snd_info_entry *proc_info_entry; | |
474 | struct snd_info_entry *proc_hw_params_entry; | |
475 | struct snd_info_entry *proc_sw_params_entry; | |
476 | struct snd_info_entry *proc_status_entry; | |
477 | struct snd_info_entry *proc_prealloc_entry; | |
478 | struct snd_info_entry *proc_prealloc_max_entry; | |
479 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG | |
480 | struct snd_info_entry *proc_xrun_injection_entry; | |
481 | #endif | |
482 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ | |
483 | /* misc flags */ | |
484 | unsigned int hw_opened: 1; | |
485 | }; | |
486 | ||
487 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) | |
488 | ||
489 | ||
490 | struct snd_pcm_str { | |
491 | int stream; /* stream (direction) */ | |
492 | struct snd_pcm *pcm; | |
493 | /* -- substreams -- */ | |
494 | unsigned int substream_count; | |
495 | unsigned int substream_opened; | |
496 | struct snd_pcm_substream *substream; | |
497 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
498 | /* -- OSS things -- */ | |
499 | struct snd_pcm_oss_stream oss; | |
500 | #endif | |
501 | #ifdef CONFIG_SND_VERBOSE_PROCFS | |
502 | struct snd_info_entry *proc_root; | |
503 | struct snd_info_entry *proc_info_entry; | |
504 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG | |
505 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ | |
506 | struct snd_info_entry *proc_xrun_debug_entry; | |
507 | #endif | |
508 | #endif | |
509 | struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */ | |
510 | struct device dev; | |
511 | }; | |
512 | ||
513 | struct snd_pcm { | |
514 | struct snd_card *card; | |
515 | struct list_head list; | |
516 | int device; /* device number */ | |
517 | unsigned int info_flags; | |
518 | unsigned short dev_class; | |
519 | unsigned short dev_subclass; | |
520 | char id[64]; | |
521 | char name[80]; | |
522 | struct snd_pcm_str streams[2]; | |
523 | struct mutex open_mutex; | |
524 | wait_queue_head_t open_wait; | |
525 | void *private_data; | |
526 | void (*private_free) (struct snd_pcm *pcm); | |
527 | bool internal; /* pcm is for internal use only */ | |
528 | bool nonatomic; /* whole PCM operations are in non-atomic context */ | |
529 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
530 | struct snd_pcm_oss oss; | |
531 | #endif | |
532 | }; | |
533 | ||
534 | struct snd_pcm_notify { | |
535 | int (*n_register) (struct snd_pcm * pcm); | |
536 | int (*n_disconnect) (struct snd_pcm * pcm); | |
537 | int (*n_unregister) (struct snd_pcm * pcm); | |
538 | struct list_head list; | |
539 | }; | |
540 | ||
541 | /* | |
542 | * Registering | |
543 | */ | |
544 | ||
545 | extern const struct file_operations snd_pcm_f_ops[2]; | |
546 | ||
547 | int snd_pcm_new(struct snd_card *card, const char *id, int device, | |
548 | int playback_count, int capture_count, | |
549 | struct snd_pcm **rpcm); | |
550 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, | |
551 | int playback_count, int capture_count, | |
552 | struct snd_pcm **rpcm); | |
553 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); | |
554 | ||
555 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); | |
556 | ||
557 | /* | |
558 | * Native I/O | |
559 | */ | |
560 | ||
561 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); | |
562 | int snd_pcm_info_user(struct snd_pcm_substream *substream, | |
563 | struct snd_pcm_info __user *info); | |
564 | int snd_pcm_status(struct snd_pcm_substream *substream, | |
565 | struct snd_pcm_status *status); | |
566 | int snd_pcm_start(struct snd_pcm_substream *substream); | |
567 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status); | |
568 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); | |
569 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream); | |
570 | #ifdef CONFIG_PM | |
571 | int snd_pcm_suspend(struct snd_pcm_substream *substream); | |
572 | int snd_pcm_suspend_all(struct snd_pcm *pcm); | |
573 | #endif | |
574 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); | |
575 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, | |
576 | struct snd_pcm_substream **rsubstream); | |
577 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); | |
578 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, | |
579 | struct snd_pcm_substream **rsubstream); | |
580 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); | |
581 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); | |
582 | ||
583 | ||
584 | #ifdef CONFIG_SND_DEBUG | |
585 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
586 | char *name, size_t len); | |
587 | #else | |
588 | static inline void | |
589 | snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size) | |
590 | { | |
591 | *buf = 0; | |
592 | } | |
593 | #endif | |
594 | ||
595 | /* | |
596 | * PCM library | |
597 | */ | |
598 | ||
599 | /** | |
600 | * snd_pcm_stream_linked - Check whether the substream is linked with others | |
601 | * @substream: substream to check | |
602 | * | |
603 | * Returns true if the given substream is being linked with others. | |
604 | */ | |
605 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) | |
606 | { | |
607 | return substream->group != &substream->self_group; | |
608 | } | |
609 | ||
610 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream); | |
611 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream); | |
612 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream); | |
613 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream); | |
614 | unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream); | |
615 | ||
616 | /** | |
617 | * snd_pcm_stream_lock_irqsave - Lock the PCM stream | |
618 | * @substream: PCM substream | |
619 | * @flags: irq flags | |
620 | * | |
621 | * This locks the PCM stream like snd_pcm_stream_lock() but with the local | |
622 | * IRQ (only when nonatomic is false). In nonatomic case, this is identical | |
623 | * as snd_pcm_stream_lock(). | |
624 | */ | |
625 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ | |
626 | do { \ | |
627 | typecheck(unsigned long, flags); \ | |
628 | flags = _snd_pcm_stream_lock_irqsave(substream); \ | |
629 | } while (0) | |
630 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, | |
631 | unsigned long flags); | |
632 | ||
633 | /** | |
634 | * snd_pcm_group_for_each_entry - iterate over the linked substreams | |
635 | * @s: the iterator | |
636 | * @substream: the substream | |
637 | * | |
638 | * Iterate over the all linked substreams to the given @substream. | |
639 | * When @substream isn't linked with any others, this gives returns @substream | |
640 | * itself once. | |
641 | */ | |
642 | #define snd_pcm_group_for_each_entry(s, substream) \ | |
643 | list_for_each_entry(s, &substream->group->substreams, link_list) | |
644 | ||
645 | /** | |
646 | * snd_pcm_running - Check whether the substream is in a running state | |
647 | * @substream: substream to check | |
648 | * | |
649 | * Returns true if the given substream is in the state RUNNING, or in the | |
650 | * state DRAINING for playback. | |
651 | */ | |
652 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) | |
653 | { | |
654 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
655 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
656 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); | |
657 | } | |
658 | ||
659 | /** | |
660 | * bytes_to_samples - Unit conversion of the size from bytes to samples | |
661 | * @runtime: PCM runtime instance | |
662 | * @size: size in bytes | |
663 | */ | |
664 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) | |
665 | { | |
666 | return size * 8 / runtime->sample_bits; | |
667 | } | |
668 | ||
669 | /** | |
670 | * bytes_to_frames - Unit conversion of the size from bytes to frames | |
671 | * @runtime: PCM runtime instance | |
672 | * @size: size in bytes | |
673 | */ | |
674 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) | |
675 | { | |
676 | return size * 8 / runtime->frame_bits; | |
677 | } | |
678 | ||
679 | /** | |
680 | * samples_to_bytes - Unit conversion of the size from samples to bytes | |
681 | * @runtime: PCM runtime instance | |
682 | * @size: size in samples | |
683 | */ | |
684 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) | |
685 | { | |
686 | return size * runtime->sample_bits / 8; | |
687 | } | |
688 | ||
689 | /** | |
690 | * frames_to_bytes - Unit conversion of the size from frames to bytes | |
691 | * @runtime: PCM runtime instance | |
692 | * @size: size in frames | |
693 | */ | |
694 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) | |
695 | { | |
696 | return size * runtime->frame_bits / 8; | |
697 | } | |
698 | ||
699 | /** | |
700 | * frame_aligned - Check whether the byte size is aligned to frames | |
701 | * @runtime: PCM runtime instance | |
702 | * @bytes: size in bytes | |
703 | */ | |
704 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) | |
705 | { | |
706 | return bytes % runtime->byte_align == 0; | |
707 | } | |
708 | ||
709 | /** | |
710 | * snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes | |
711 | * @substream: PCM substream | |
712 | */ | |
713 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) | |
714 | { | |
715 | struct snd_pcm_runtime *runtime = substream->runtime; | |
716 | return frames_to_bytes(runtime, runtime->buffer_size); | |
717 | } | |
718 | ||
719 | /** | |
720 | * snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes | |
721 | * @substream: PCM substream | |
722 | */ | |
723 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) | |
724 | { | |
725 | struct snd_pcm_runtime *runtime = substream->runtime; | |
726 | return frames_to_bytes(runtime, runtime->period_size); | |
727 | } | |
728 | ||
729 | /** | |
730 | * snd_pcm_playback_avail - Get the available (writable) space for playback | |
731 | * @runtime: PCM runtime instance | |
732 | * | |
733 | * Result is between 0 ... (boundary - 1) | |
734 | */ | |
735 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) | |
736 | { | |
737 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; | |
738 | if (avail < 0) | |
739 | avail += runtime->boundary; | |
740 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) | |
741 | avail -= runtime->boundary; | |
742 | return avail; | |
743 | } | |
744 | ||
745 | /** | |
746 | * snd_pcm_playback_avail - Get the available (readable) space for capture | |
747 | * @runtime: PCM runtime instance | |
748 | * | |
749 | * Result is between 0 ... (boundary - 1) | |
750 | */ | |
751 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) | |
752 | { | |
753 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; | |
754 | if (avail < 0) | |
755 | avail += runtime->boundary; | |
756 | return avail; | |
757 | } | |
758 | ||
759 | /** | |
760 | * snd_pcm_playback_hw_avail - Get the queued space for playback | |
761 | * @runtime: PCM runtime instance | |
762 | */ | |
763 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) | |
764 | { | |
765 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); | |
766 | } | |
767 | ||
768 | /** | |
769 | * snd_pcm_capture_hw_avail - Get the free space for capture | |
770 | * @runtime: PCM runtime instance | |
771 | */ | |
772 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) | |
773 | { | |
774 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); | |
775 | } | |
776 | ||
777 | /** | |
778 | * snd_pcm_playback_ready - check whether the playback buffer is available | |
779 | * @substream: the pcm substream instance | |
780 | * | |
781 | * Checks whether enough free space is available on the playback buffer. | |
782 | * | |
783 | * Return: Non-zero if available, or zero if not. | |
784 | */ | |
785 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) | |
786 | { | |
787 | struct snd_pcm_runtime *runtime = substream->runtime; | |
788 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; | |
789 | } | |
790 | ||
791 | /** | |
792 | * snd_pcm_capture_ready - check whether the capture buffer is available | |
793 | * @substream: the pcm substream instance | |
794 | * | |
795 | * Checks whether enough capture data is available on the capture buffer. | |
796 | * | |
797 | * Return: Non-zero if available, or zero if not. | |
798 | */ | |
799 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) | |
800 | { | |
801 | struct snd_pcm_runtime *runtime = substream->runtime; | |
802 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; | |
803 | } | |
804 | ||
805 | /** | |
806 | * snd_pcm_playback_data - check whether any data exists on the playback buffer | |
807 | * @substream: the pcm substream instance | |
808 | * | |
809 | * Checks whether any data exists on the playback buffer. | |
810 | * | |
811 | * Return: Non-zero if any data exists, or zero if not. If stop_threshold | |
812 | * is bigger or equal to boundary, then this function returns always non-zero. | |
813 | */ | |
814 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) | |
815 | { | |
816 | struct snd_pcm_runtime *runtime = substream->runtime; | |
817 | ||
818 | if (runtime->stop_threshold >= runtime->boundary) | |
819 | return 1; | |
820 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; | |
821 | } | |
822 | ||
823 | /** | |
824 | * snd_pcm_playback_empty - check whether the playback buffer is empty | |
825 | * @substream: the pcm substream instance | |
826 | * | |
827 | * Checks whether the playback buffer is empty. | |
828 | * | |
829 | * Return: Non-zero if empty, or zero if not. | |
830 | */ | |
831 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) | |
832 | { | |
833 | struct snd_pcm_runtime *runtime = substream->runtime; | |
834 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; | |
835 | } | |
836 | ||
837 | /** | |
838 | * snd_pcm_capture_empty - check whether the capture buffer is empty | |
839 | * @substream: the pcm substream instance | |
840 | * | |
841 | * Checks whether the capture buffer is empty. | |
842 | * | |
843 | * Return: Non-zero if empty, or zero if not. | |
844 | */ | |
845 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) | |
846 | { | |
847 | struct snd_pcm_runtime *runtime = substream->runtime; | |
848 | return snd_pcm_capture_avail(runtime) == 0; | |
849 | } | |
850 | ||
851 | /** | |
852 | * snd_pcm_trigger_done - Mark the master substream | |
853 | * @substream: the pcm substream instance | |
854 | * @master: the linked master substream | |
855 | * | |
856 | * When multiple substreams of the same card are linked and the hardware | |
857 | * supports the single-shot operation, the driver calls this in the loop | |
858 | * in snd_pcm_group_for_each_entry() for marking the substream as "done". | |
859 | * Then most of trigger operations are performed only to the given master | |
860 | * substream. | |
861 | * | |
862 | * The trigger_master mark is cleared at timestamp updates at the end | |
863 | * of trigger operations. | |
864 | */ | |
865 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, | |
866 | struct snd_pcm_substream *master) | |
867 | { | |
868 | substream->runtime->trigger_master = master; | |
869 | } | |
870 | ||
871 | static inline int hw_is_mask(int var) | |
872 | { | |
873 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && | |
874 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; | |
875 | } | |
876 | ||
877 | static inline int hw_is_interval(int var) | |
878 | { | |
879 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && | |
880 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; | |
881 | } | |
882 | ||
883 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, | |
884 | snd_pcm_hw_param_t var) | |
885 | { | |
886 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
887 | } | |
888 | ||
889 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, | |
890 | snd_pcm_hw_param_t var) | |
891 | { | |
892 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
893 | } | |
894 | ||
895 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, | |
896 | snd_pcm_hw_param_t var) | |
897 | { | |
898 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
899 | } | |
900 | ||
901 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, | |
902 | snd_pcm_hw_param_t var) | |
903 | { | |
904 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
905 | } | |
906 | ||
907 | /** | |
908 | * params_channels - Get the number of channels from the hw params | |
909 | * @p: hw params | |
910 | */ | |
911 | static inline unsigned int params_channels(const struct snd_pcm_hw_params *p) | |
912 | { | |
913 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min; | |
914 | } | |
915 | ||
916 | /** | |
917 | * params_rate - Get the sample rate from the hw params | |
918 | * @p: hw params | |
919 | */ | |
920 | static inline unsigned int params_rate(const struct snd_pcm_hw_params *p) | |
921 | { | |
922 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min; | |
923 | } | |
924 | ||
925 | /** | |
926 | * params_period_size - Get the period size (in frames) from the hw params | |
927 | * @p: hw params | |
928 | */ | |
929 | static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p) | |
930 | { | |
931 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min; | |
932 | } | |
933 | ||
934 | /** | |
935 | * params_periods - Get the number of periods from the hw params | |
936 | * @p: hw params | |
937 | */ | |
938 | static inline unsigned int params_periods(const struct snd_pcm_hw_params *p) | |
939 | { | |
940 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min; | |
941 | } | |
942 | ||
943 | /** | |
944 | * params_buffer_size - Get the buffer size (in frames) from the hw params | |
945 | * @p: hw params | |
946 | */ | |
947 | static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p) | |
948 | { | |
949 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min; | |
950 | } | |
951 | ||
952 | /** | |
953 | * params_buffer_bytes - Get the buffer size (in bytes) from the hw params | |
954 | * @p: hw params | |
955 | */ | |
956 | static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p) | |
957 | { | |
958 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min; | |
959 | } | |
960 | ||
961 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); | |
962 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
963 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
964 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, | |
965 | unsigned int k, struct snd_interval *c); | |
966 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, | |
967 | const struct snd_interval *b, struct snd_interval *c); | |
968 | int snd_interval_list(struct snd_interval *i, unsigned int count, | |
969 | const unsigned int *list, unsigned int mask); | |
970 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, | |
971 | const struct snd_interval *list, unsigned int mask); | |
972 | int snd_interval_ratnum(struct snd_interval *i, | |
973 | unsigned int rats_count, const struct snd_ratnum *rats, | |
974 | unsigned int *nump, unsigned int *denp); | |
975 | ||
976 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); | |
977 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); | |
978 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); | |
979 | ||
980 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); | |
981 | ||
982 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); | |
983 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); | |
984 | ||
985 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, | |
986 | u_int32_t mask); | |
987 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, | |
988 | u_int64_t mask); | |
989 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, | |
990 | unsigned int min, unsigned int max); | |
991 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); | |
992 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, | |
993 | unsigned int cond, | |
994 | snd_pcm_hw_param_t var, | |
995 | const struct snd_pcm_hw_constraint_list *l); | |
996 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, | |
997 | unsigned int cond, | |
998 | snd_pcm_hw_param_t var, | |
999 | const struct snd_pcm_hw_constraint_ranges *r); | |
1000 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, | |
1001 | unsigned int cond, | |
1002 | snd_pcm_hw_param_t var, | |
1003 | const struct snd_pcm_hw_constraint_ratnums *r); | |
1004 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, | |
1005 | unsigned int cond, | |
1006 | snd_pcm_hw_param_t var, | |
1007 | const struct snd_pcm_hw_constraint_ratdens *r); | |
1008 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, | |
1009 | unsigned int cond, | |
1010 | unsigned int width, | |
1011 | unsigned int msbits); | |
1012 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, | |
1013 | unsigned int cond, | |
1014 | snd_pcm_hw_param_t var, | |
1015 | unsigned long step); | |
1016 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, | |
1017 | unsigned int cond, | |
1018 | snd_pcm_hw_param_t var); | |
1019 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, | |
1020 | unsigned int base_rate); | |
1021 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, | |
1022 | unsigned int cond, | |
1023 | int var, | |
1024 | snd_pcm_hw_rule_func_t func, void *private, | |
1025 | int dep, ...); | |
1026 | ||
1027 | /** | |
1028 | * snd_pcm_hw_constraint_single() - Constrain parameter to a single value | |
1029 | * @runtime: PCM runtime instance | |
1030 | * @var: The hw_params variable to constrain | |
1031 | * @val: The value to constrain to | |
1032 | * | |
1033 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1034 | * negative error code. | |
1035 | */ | |
1036 | static inline int snd_pcm_hw_constraint_single( | |
1037 | struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, | |
1038 | unsigned int val) | |
1039 | { | |
1040 | return snd_pcm_hw_constraint_minmax(runtime, var, val, val); | |
1041 | } | |
1042 | ||
1043 | int snd_pcm_format_signed(snd_pcm_format_t format); | |
1044 | int snd_pcm_format_unsigned(snd_pcm_format_t format); | |
1045 | int snd_pcm_format_linear(snd_pcm_format_t format); | |
1046 | int snd_pcm_format_little_endian(snd_pcm_format_t format); | |
1047 | int snd_pcm_format_big_endian(snd_pcm_format_t format); | |
1048 | #if 0 /* just for DocBook */ | |
1049 | /** | |
1050 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian | |
1051 | * @format: the format to check | |
1052 | * | |
1053 | * Return: 1 if the given PCM format is CPU-endian, 0 if | |
1054 | * opposite, or a negative error code if endian not specified. | |
1055 | */ | |
1056 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); | |
1057 | #endif /* DocBook */ | |
1058 | #ifdef SNDRV_LITTLE_ENDIAN | |
1059 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) | |
1060 | #else | |
1061 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) | |
1062 | #endif | |
1063 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ | |
1064 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ | |
1065 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); | |
1066 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); | |
1067 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); | |
1068 | ||
1069 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, | |
1070 | const struct snd_pcm_ops *ops); | |
1071 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); | |
1072 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, | |
1073 | unsigned int cmd, void *arg); | |
1074 | int snd_pcm_update_state(struct snd_pcm_substream *substream, | |
1075 | struct snd_pcm_runtime *runtime); | |
1076 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); | |
1077 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); | |
1078 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); | |
1079 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, | |
1080 | const void __user *buf, | |
1081 | snd_pcm_uframes_t frames); | |
1082 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, | |
1083 | void __user *buf, snd_pcm_uframes_t frames); | |
1084 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, | |
1085 | void __user **bufs, snd_pcm_uframes_t frames); | |
1086 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, | |
1087 | void __user **bufs, snd_pcm_uframes_t frames); | |
1088 | ||
1089 | extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; | |
1090 | ||
1091 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); | |
1092 | unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); | |
1093 | unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); | |
1094 | unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a, | |
1095 | unsigned int rates_b); | |
1096 | unsigned int snd_pcm_rate_range_to_bits(unsigned int rate_min, | |
1097 | unsigned int rate_max); | |
1098 | ||
1099 | /** | |
1100 | * snd_pcm_set_runtime_buffer - Set the PCM runtime buffer | |
1101 | * @substream: PCM substream to set | |
1102 | * @bufp: the buffer information, NULL to clear | |
1103 | * | |
1104 | * Copy the buffer information to runtime->dma_buffer when @bufp is non-NULL. | |
1105 | * Otherwise it clears the current buffer information. | |
1106 | */ | |
1107 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, | |
1108 | struct snd_dma_buffer *bufp) | |
1109 | { | |
1110 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1111 | if (bufp) { | |
1112 | runtime->dma_buffer_p = bufp; | |
1113 | runtime->dma_area = bufp->area; | |
1114 | runtime->dma_addr = bufp->addr; | |
1115 | runtime->dma_bytes = bufp->bytes; | |
1116 | } else { | |
1117 | runtime->dma_buffer_p = NULL; | |
1118 | runtime->dma_area = NULL; | |
1119 | runtime->dma_addr = 0; | |
1120 | runtime->dma_bytes = 0; | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | /* | |
1125 | * Timer interface | |
1126 | */ | |
1127 | ||
1128 | #ifdef CONFIG_SND_PCM_TIMER | |
1129 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); | |
1130 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); | |
1131 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); | |
1132 | #else | |
1133 | static inline void | |
1134 | snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {} | |
1135 | static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {} | |
1136 | static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {} | |
1137 | #endif | |
1138 | /** | |
1139 | * snd_pcm_gettime - Fill the timespec depending on the timestamp mode | |
1140 | * @runtime: PCM runtime instance | |
1141 | * @tv: timespec to fill | |
1142 | */ | |
1143 | static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, | |
1144 | struct timespec *tv) | |
1145 | { | |
1146 | switch (runtime->tstamp_type) { | |
1147 | case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC: | |
1148 | ktime_get_ts(tv); | |
1149 | break; | |
1150 | case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW: | |
1151 | getrawmonotonic(tv); | |
1152 | break; | |
1153 | default: | |
1154 | getnstimeofday(tv); | |
1155 | break; | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | /* | |
1160 | * Memory | |
1161 | */ | |
1162 | ||
1163 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); | |
1164 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); | |
1165 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, | |
1166 | int type, struct device *data, | |
1167 | size_t size, size_t max); | |
1168 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, | |
1169 | int type, void *data, | |
1170 | size_t size, size_t max); | |
1171 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); | |
1172 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); | |
1173 | ||
1174 | int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, | |
1175 | size_t size, gfp_t gfp_flags); | |
1176 | int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); | |
1177 | struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, | |
1178 | unsigned long offset); | |
1179 | /** | |
1180 | * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer | |
1181 | * @substream: the substream to allocate the buffer to | |
1182 | * @size: the requested buffer size, in bytes | |
1183 | * | |
1184 | * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is | |
1185 | * contiguous in kernel virtual space, but not in physical memory. Use this | |
1186 | * if the buffer is accessed by kernel code but not by device DMA. | |
1187 | * | |
1188 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error | |
1189 | * code. | |
1190 | */ | |
1191 | static inline int snd_pcm_lib_alloc_vmalloc_buffer | |
1192 | (struct snd_pcm_substream *substream, size_t size) | |
1193 | { | |
1194 | return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, | |
1195 | GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO); | |
1196 | } | |
1197 | ||
1198 | /** | |
1199 | * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer | |
1200 | * @substream: the substream to allocate the buffer to | |
1201 | * @size: the requested buffer size, in bytes | |
1202 | * | |
1203 | * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses | |
1204 | * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. | |
1205 | * | |
1206 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error | |
1207 | * code. | |
1208 | */ | |
1209 | static inline int snd_pcm_lib_alloc_vmalloc_32_buffer | |
1210 | (struct snd_pcm_substream *substream, size_t size) | |
1211 | { | |
1212 | return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, | |
1213 | GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); | |
1214 | } | |
1215 | ||
1216 | #define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p) | |
1217 | ||
1218 | #ifdef CONFIG_SND_DMA_SGBUF | |
1219 | /* | |
1220 | * SG-buffer handling | |
1221 | */ | |
1222 | #define snd_pcm_substream_sgbuf(substream) \ | |
1223 | snd_pcm_get_dma_buf(substream)->private_data | |
1224 | ||
1225 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, | |
1226 | unsigned long offset); | |
1227 | #else /* !SND_DMA_SGBUF */ | |
1228 | /* | |
1229 | * fake using a continuous buffer | |
1230 | */ | |
1231 | #define snd_pcm_sgbuf_ops_page NULL | |
1232 | #endif /* SND_DMA_SGBUF */ | |
1233 | ||
1234 | /** | |
1235 | * snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset | |
1236 | * @substream: PCM substream | |
1237 | * @ofs: byte offset | |
1238 | */ | |
1239 | static inline dma_addr_t | |
1240 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) | |
1241 | { | |
1242 | return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs); | |
1243 | } | |
1244 | ||
1245 | /** | |
1246 | * snd_pcm_sgbuf_get_ptr - Get the virtual address at the corresponding offset | |
1247 | * @substream: PCM substream | |
1248 | * @ofs: byte offset | |
1249 | */ | |
1250 | static inline void * | |
1251 | snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) | |
1252 | { | |
1253 | return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs); | |
1254 | } | |
1255 | ||
1256 | /** | |
1257 | * snd_pcm_sgbuf_chunk_size - Compute the max size that fits within the contig. | |
1258 | * page from the given size | |
1259 | * @substream: PCM substream | |
1260 | * @ofs: byte offset | |
1261 | * @size: byte size to examine | |
1262 | */ | |
1263 | static inline unsigned int | |
1264 | snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, | |
1265 | unsigned int ofs, unsigned int size) | |
1266 | { | |
1267 | return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size); | |
1268 | } | |
1269 | ||
1270 | /** | |
1271 | * snd_pcm_mmap_data_open - increase the mmap counter | |
1272 | * @area: VMA | |
1273 | * | |
1274 | * PCM mmap callback should handle this counter properly | |
1275 | */ | |
1276 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) | |
1277 | { | |
1278 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; | |
1279 | atomic_inc(&substream->mmap_count); | |
1280 | } | |
1281 | ||
1282 | /** | |
1283 | * snd_pcm_mmap_data_close - decrease the mmap counter | |
1284 | * @area: VMA | |
1285 | * | |
1286 | * PCM mmap callback should handle this counter properly | |
1287 | */ | |
1288 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) | |
1289 | { | |
1290 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; | |
1291 | atomic_dec(&substream->mmap_count); | |
1292 | } | |
1293 | ||
1294 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, | |
1295 | struct vm_area_struct *area); | |
1296 | /* mmap for io-memory area */ | |
1297 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
1298 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP | |
1299 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); | |
1300 | #else | |
1301 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 | |
1302 | #define snd_pcm_lib_mmap_iomem NULL | |
1303 | #endif | |
1304 | ||
1305 | #define snd_pcm_lib_mmap_vmalloc NULL | |
1306 | ||
1307 | /** | |
1308 | * snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer | |
1309 | * @dma: DMA number | |
1310 | * @max: pointer to store the max size | |
1311 | */ | |
1312 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) | |
1313 | { | |
1314 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; | |
1315 | } | |
1316 | ||
1317 | /* | |
1318 | * Misc | |
1319 | */ | |
1320 | ||
1321 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ | |
1322 | (IEC958_AES1_CON_ORIGINAL<<8)|\ | |
1323 | (IEC958_AES1_CON_PCM_CODER<<8)|\ | |
1324 | (IEC958_AES3_CON_FS_48000<<24)) | |
1325 | ||
1326 | #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) | |
1327 | ||
1328 | const char *snd_pcm_format_name(snd_pcm_format_t format); | |
1329 | ||
1330 | /** | |
1331 | * snd_pcm_stream_str - Get a string naming the direction of a stream | |
1332 | * @substream: the pcm substream instance | |
1333 | * | |
1334 | * Return: A string naming the direction of the stream. | |
1335 | */ | |
1336 | static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream) | |
1337 | { | |
1338 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
1339 | return "Playback"; | |
1340 | else | |
1341 | return "Capture"; | |
1342 | } | |
1343 | ||
1344 | /* | |
1345 | * PCM channel-mapping control API | |
1346 | */ | |
1347 | /* array element of channel maps */ | |
1348 | struct snd_pcm_chmap_elem { | |
1349 | unsigned char channels; | |
1350 | unsigned char map[15]; | |
1351 | }; | |
1352 | ||
1353 | /* channel map information; retrieved via snd_kcontrol_chip() */ | |
1354 | struct snd_pcm_chmap { | |
1355 | struct snd_pcm *pcm; /* assigned PCM instance */ | |
1356 | int stream; /* PLAYBACK or CAPTURE */ | |
1357 | struct snd_kcontrol *kctl; | |
1358 | const struct snd_pcm_chmap_elem *chmap; | |
1359 | unsigned int max_channels; | |
1360 | unsigned int channel_mask; /* optional: active channels bitmask */ | |
1361 | void *private_data; /* optional: private data pointer */ | |
1362 | }; | |
1363 | ||
1364 | /** | |
1365 | * snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info | |
1366 | * @info: chmap information | |
1367 | * @idx: the substream number index | |
1368 | */ | |
1369 | static inline struct snd_pcm_substream * | |
1370 | snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) | |
1371 | { | |
1372 | struct snd_pcm_substream *s; | |
1373 | for (s = info->pcm->streams[info->stream].substream; s; s = s->next) | |
1374 | if (s->number == idx) | |
1375 | return s; | |
1376 | return NULL; | |
1377 | } | |
1378 | ||
1379 | /* ALSA-standard channel maps (RL/RR prior to C/LFE) */ | |
1380 | extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[]; | |
1381 | /* Other world's standard channel maps (C/LFE prior to RL/RR) */ | |
1382 | extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[]; | |
1383 | ||
1384 | /* bit masks to be passed to snd_pcm_chmap.channel_mask field */ | |
1385 | #define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4)) | |
1386 | #define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6)) | |
1387 | #define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8)) | |
1388 | ||
1389 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
1390 | const struct snd_pcm_chmap_elem *chmap, | |
1391 | int max_channels, | |
1392 | unsigned long private_value, | |
1393 | struct snd_pcm_chmap **info_ret); | |
1394 | ||
1395 | /** | |
1396 | * pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise | |
1397 | * @pcm_format: PCM format | |
1398 | */ | |
1399 | static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) | |
1400 | { | |
1401 | return 1ULL << (__force int) pcm_format; | |
1402 | } | |
1403 | ||
1404 | /* printk helpers */ | |
1405 | #define pcm_err(pcm, fmt, args...) \ | |
1406 | dev_err((pcm)->card->dev, fmt, ##args) | |
1407 | #define pcm_warn(pcm, fmt, args...) \ | |
1408 | dev_warn((pcm)->card->dev, fmt, ##args) | |
1409 | #define pcm_dbg(pcm, fmt, args...) \ | |
1410 | dev_dbg((pcm)->card->dev, fmt, ##args) | |
1411 | ||
1412 | #endif /* __SOUND_PCM_H */ |