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1da177e4 LT |
1 | #ifndef __SOUND_PCM_H |
2 | #define __SOUND_PCM_H | |
3 | ||
4 | /* | |
5 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 6 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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> | |
f90c06a2 | 28 | #include <sound/minors.h> |
1da177e4 | 29 | #include <linux/poll.h> |
f23f6e08 | 30 | #include <linux/mm.h> |
1da177e4 | 31 | #include <linux/bitops.h> |
e8db0be1 | 32 | #include <linux/pm_qos.h> |
1da177e4 | 33 | |
1da177e4 LT |
34 | #define snd_pcm_substream_chip(substream) ((substream)->private_data) |
35 | #define snd_pcm_chip(pcm) ((pcm)->private_data) | |
36 | ||
1da177e4 | 37 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
a1ce3928 | 38 | #include <sound/pcm_oss.h> |
1da177e4 LT |
39 | #endif |
40 | ||
41 | /* | |
42 | * Hardware (lowlevel) section | |
43 | */ | |
44 | ||
877211f5 | 45 | struct snd_pcm_hardware { |
1da177e4 LT |
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 */ | |
877211f5 | 59 | }; |
1da177e4 | 60 | |
e0e6ce03 RD |
61 | struct snd_pcm_substream; |
62 | ||
877211f5 TI |
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, | |
1da177e4 | 67 | unsigned int cmd, void *arg); |
877211f5 TI |
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); | |
4eeaaeae PLB |
74 | int (*wall_clock)(struct snd_pcm_substream *substream, |
75 | struct timespec *audio_ts); | |
877211f5 TI |
76 | int (*copy)(struct snd_pcm_substream *substream, int channel, |
77 | snd_pcm_uframes_t pos, | |
1da177e4 | 78 | void __user *buf, snd_pcm_uframes_t count); |
877211f5 | 79 | int (*silence)(struct snd_pcm_substream *substream, int channel, |
1da177e4 | 80 | snd_pcm_uframes_t pos, snd_pcm_uframes_t count); |
877211f5 TI |
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 | }; | |
1da177e4 LT |
86 | |
87 | /* | |
88 | * | |
89 | */ | |
90 | ||
f90c06a2 PM |
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 | |
896e6cc2 | 96 | |
1da177e4 LT |
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 | |
8bea869c | 104 | #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 |
1da177e4 LT |
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) | |
fea952e5 CL |
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) | |
1da177e4 LT |
184 | |
185 | #ifdef SNDRV_LITTLE_ENDIAN | |
186 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE | |
187 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE | |
188 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE | |
189 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE | |
190 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE | |
191 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE | |
192 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE | |
193 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE | |
194 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | |
195 | #endif | |
196 | #ifdef SNDRV_BIG_ENDIAN | |
197 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE | |
198 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE | |
199 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE | |
200 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE | |
201 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE | |
202 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE | |
203 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE | |
204 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE | |
205 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE | |
206 | #endif | |
207 | ||
877211f5 TI |
208 | struct snd_pcm_file { |
209 | struct snd_pcm_substream *substream; | |
548a648b | 210 | int no_compat_mmap; |
1da177e4 LT |
211 | }; |
212 | ||
877211f5 TI |
213 | struct snd_pcm_hw_rule; |
214 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, | |
215 | struct snd_pcm_hw_rule *rule); | |
1da177e4 | 216 | |
877211f5 | 217 | struct snd_pcm_hw_rule { |
1da177e4 LT |
218 | unsigned int cond; |
219 | snd_pcm_hw_rule_func_t func; | |
220 | int var; | |
221 | int deps[4]; | |
222 | void *private; | |
223 | }; | |
224 | ||
877211f5 TI |
225 | struct snd_pcm_hw_constraints { |
226 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - | |
1da177e4 | 227 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
877211f5 | 228 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
1da177e4 LT |
229 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
230 | unsigned int rules_num; | |
231 | unsigned int rules_all; | |
877211f5 TI |
232 | struct snd_pcm_hw_rule *rules; |
233 | }; | |
1da177e4 | 234 | |
877211f5 TI |
235 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
236 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
237 | { |
238 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
239 | } | |
240 | ||
877211f5 TI |
241 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
242 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
243 | { |
244 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
245 | } | |
246 | ||
877211f5 | 247 | struct snd_ratnum { |
1da177e4 LT |
248 | unsigned int num; |
249 | unsigned int den_min, den_max, den_step; | |
877211f5 | 250 | }; |
1da177e4 | 251 | |
877211f5 | 252 | struct snd_ratden { |
1da177e4 LT |
253 | unsigned int num_min, num_max, num_step; |
254 | unsigned int den; | |
877211f5 | 255 | }; |
1da177e4 | 256 | |
877211f5 | 257 | struct snd_pcm_hw_constraint_ratnums { |
1da177e4 | 258 | int nrats; |
877211f5 TI |
259 | struct snd_ratnum *rats; |
260 | }; | |
1da177e4 | 261 | |
877211f5 | 262 | struct snd_pcm_hw_constraint_ratdens { |
1da177e4 | 263 | int nrats; |
877211f5 TI |
264 | struct snd_ratden *rats; |
265 | }; | |
1da177e4 | 266 | |
877211f5 | 267 | struct snd_pcm_hw_constraint_list { |
1da177e4 | 268 | unsigned int count; |
4af87a93 | 269 | const unsigned int *list; |
1da177e4 | 270 | unsigned int mask; |
877211f5 | 271 | }; |
1da177e4 | 272 | |
4d96eb25 JK |
273 | struct snd_pcm_hwptr_log; |
274 | ||
877211f5 | 275 | struct snd_pcm_runtime { |
1da177e4 | 276 | /* -- Status -- */ |
877211f5 | 277 | struct snd_pcm_substream *trigger_master; |
07799e75 | 278 | struct timespec trigger_tstamp; /* trigger timestamp */ |
1da177e4 LT |
279 | int overrange; |
280 | snd_pcm_uframes_t avail_max; | |
281 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ | |
e7636925 | 282 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ |
bbf6ad13 | 283 | unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ |
bd76af0f | 284 | unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ |
4bbe1ddf | 285 | snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ |
0e8014d7 | 286 | u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */ |
1da177e4 LT |
287 | |
288 | /* -- HW params -- */ | |
289 | snd_pcm_access_t access; /* access mode */ | |
290 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ | |
291 | snd_pcm_subformat_t subformat; /* subformat */ | |
292 | unsigned int rate; /* rate in Hz */ | |
293 | unsigned int channels; /* channels */ | |
294 | snd_pcm_uframes_t period_size; /* period size */ | |
295 | unsigned int periods; /* periods */ | |
296 | snd_pcm_uframes_t buffer_size; /* buffer size */ | |
1da177e4 LT |
297 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ |
298 | size_t byte_align; | |
299 | unsigned int frame_bits; | |
300 | unsigned int sample_bits; | |
301 | unsigned int info; | |
302 | unsigned int rate_num; | |
303 | unsigned int rate_den; | |
ab69a490 | 304 | unsigned int no_period_wakeup: 1; |
1da177e4 LT |
305 | |
306 | /* -- SW params -- */ | |
877211f5 | 307 | int tstamp_mode; /* mmap timestamp is updated */ |
1da177e4 | 308 | unsigned int period_step; |
1da177e4 LT |
309 | snd_pcm_uframes_t start_threshold; |
310 | snd_pcm_uframes_t stop_threshold; | |
311 | snd_pcm_uframes_t silence_threshold; /* Silence filling happens when | |
312 | noise is nearest than this */ | |
313 | snd_pcm_uframes_t silence_size; /* Silence filling size */ | |
314 | snd_pcm_uframes_t boundary; /* pointers wrap point */ | |
315 | ||
316 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ | |
317 | snd_pcm_uframes_t silence_filled; /* size filled with silence */ | |
318 | ||
877211f5 | 319 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ |
1da177e4 LT |
320 | |
321 | /* -- mmap -- */ | |
503fc85a TI |
322 | struct snd_pcm_mmap_status *status; |
323 | struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
324 | |
325 | /* -- locking / scheduling -- */ | |
5daeba34 | 326 | snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ |
c91a988d JK |
327 | wait_queue_head_t sleep; /* poll sleep */ |
328 | wait_queue_head_t tsleep; /* transfer sleep */ | |
1da177e4 LT |
329 | struct fasync_struct *fasync; |
330 | ||
331 | /* -- private section -- */ | |
332 | void *private_data; | |
877211f5 | 333 | void (*private_free)(struct snd_pcm_runtime *runtime); |
1da177e4 LT |
334 | |
335 | /* -- hardware description -- */ | |
877211f5 TI |
336 | struct snd_pcm_hardware hw; |
337 | struct snd_pcm_hw_constraints hw_constraints; | |
1da177e4 LT |
338 | |
339 | /* -- interrupt callbacks -- */ | |
877211f5 TI |
340 | void (*transfer_ack_begin)(struct snd_pcm_substream *substream); |
341 | void (*transfer_ack_end)(struct snd_pcm_substream *substream); | |
1da177e4 LT |
342 | |
343 | /* -- timer -- */ | |
344 | unsigned int timer_resolution; /* timer resolution */ | |
b751eef1 | 345 | int tstamp_type; /* timestamp type */ |
1da177e4 LT |
346 | |
347 | /* -- DMA -- */ | |
348 | unsigned char *dma_area; /* DMA area */ | |
349 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ | |
350 | size_t dma_bytes; /* size of DMA area */ | |
351 | ||
352 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ | |
353 | ||
354 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
355 | /* -- OSS things -- */ | |
877211f5 | 356 | struct snd_pcm_oss_runtime oss; |
1da177e4 | 357 | #endif |
4d96eb25 JK |
358 | |
359 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG | |
360 | struct snd_pcm_hwptr_log *hwptr_log; | |
361 | #endif | |
1da177e4 LT |
362 | }; |
363 | ||
877211f5 | 364 | struct snd_pcm_group { /* keep linked substreams */ |
1da177e4 LT |
365 | spinlock_t lock; |
366 | struct list_head substreams; | |
367 | int count; | |
877211f5 | 368 | }; |
1da177e4 | 369 | |
e7373b70 CL |
370 | struct pid; |
371 | ||
877211f5 TI |
372 | struct snd_pcm_substream { |
373 | struct snd_pcm *pcm; | |
374 | struct snd_pcm_str *pstr; | |
1da177e4 LT |
375 | void *private_data; /* copied from pcm->private_data */ |
376 | int number; | |
377 | char name[32]; /* substream name */ | |
378 | int stream; /* stream (direction) */ | |
cc749986 | 379 | struct pm_qos_request latency_pm_qos_req; /* pm_qos request */ |
1da177e4 LT |
380 | size_t buffer_bytes_max; /* limit ring buffer size */ |
381 | struct snd_dma_buffer dma_buffer; | |
382 | unsigned int dma_buf_id; | |
383 | size_t dma_max; | |
384 | /* -- hardware operations -- */ | |
877211f5 | 385 | struct snd_pcm_ops *ops; |
1da177e4 | 386 | /* -- runtime information -- */ |
877211f5 | 387 | struct snd_pcm_runtime *runtime; |
1da177e4 | 388 | /* -- timer section -- */ |
877211f5 | 389 | struct snd_timer *timer; /* timer */ |
1da177e4 | 390 | unsigned timer_running: 1; /* time is running */ |
1da177e4 | 391 | /* -- next substream -- */ |
877211f5 | 392 | struct snd_pcm_substream *next; |
1da177e4 LT |
393 | /* -- linked substreams -- */ |
394 | struct list_head link_list; /* linked list member */ | |
877211f5 TI |
395 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ |
396 | struct snd_pcm_group *group; /* pointer to current group */ | |
1da177e4 | 397 | /* -- assigned files -- */ |
1576274d | 398 | void *file; |
0df63e44 | 399 | int ref_count; |
9c323fcb | 400 | atomic_t mmap_count; |
0df63e44 | 401 | unsigned int f_flags; |
3bf75f9b | 402 | void (*pcm_release)(struct snd_pcm_substream *); |
e7373b70 | 403 | struct pid *pid; |
1da177e4 LT |
404 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
405 | /* -- OSS things -- */ | |
877211f5 | 406 | struct snd_pcm_oss_substream oss; |
1da177e4 | 407 | #endif |
b7d90a35 | 408 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
409 | struct snd_info_entry *proc_root; |
410 | struct snd_info_entry *proc_info_entry; | |
411 | struct snd_info_entry *proc_hw_params_entry; | |
412 | struct snd_info_entry *proc_sw_params_entry; | |
413 | struct snd_info_entry *proc_status_entry; | |
414 | struct snd_info_entry *proc_prealloc_entry; | |
c7132aeb | 415 | struct snd_info_entry *proc_prealloc_max_entry; |
b7d90a35 | 416 | #endif |
1da177e4 | 417 | /* misc flags */ |
3bf75f9b | 418 | unsigned int hw_opened: 1; |
1da177e4 LT |
419 | }; |
420 | ||
0df63e44 | 421 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
1da177e4 LT |
422 | |
423 | ||
877211f5 | 424 | struct snd_pcm_str { |
1da177e4 | 425 | int stream; /* stream (direction) */ |
877211f5 | 426 | struct snd_pcm *pcm; |
1da177e4 LT |
427 | /* -- substreams -- */ |
428 | unsigned int substream_count; | |
429 | unsigned int substream_opened; | |
877211f5 | 430 | struct snd_pcm_substream *substream; |
1da177e4 LT |
431 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
432 | /* -- OSS things -- */ | |
877211f5 | 433 | struct snd_pcm_oss_stream oss; |
1da177e4 | 434 | #endif |
b7d90a35 | 435 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
436 | struct snd_info_entry *proc_root; |
437 | struct snd_info_entry *proc_info_entry; | |
b7d90a35 | 438 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
1da177e4 | 439 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ |
877211f5 | 440 | struct snd_info_entry *proc_xrun_debug_entry; |
1da177e4 | 441 | #endif |
b7d90a35 | 442 | #endif |
2d3391ec | 443 | struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */ |
1da177e4 LT |
444 | }; |
445 | ||
877211f5 TI |
446 | struct snd_pcm { |
447 | struct snd_card *card; | |
f87135f5 | 448 | struct list_head list; |
f90c06a2 | 449 | int device; /* device number */ |
1da177e4 LT |
450 | unsigned int info_flags; |
451 | unsigned short dev_class; | |
452 | unsigned short dev_subclass; | |
453 | char id[64]; | |
454 | char name[80]; | |
877211f5 | 455 | struct snd_pcm_str streams[2]; |
1a60d4c5 | 456 | struct mutex open_mutex; |
1da177e4 LT |
457 | wait_queue_head_t open_wait; |
458 | void *private_data; | |
877211f5 | 459 | void (*private_free) (struct snd_pcm *pcm); |
c78085fc | 460 | struct device *dev; /* actual hw device this belongs to */ |
945e5038 | 461 | bool internal; /* pcm is for internal use only */ |
1da177e4 | 462 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 463 | struct snd_pcm_oss oss; |
1da177e4 LT |
464 | #endif |
465 | }; | |
466 | ||
877211f5 TI |
467 | struct snd_pcm_notify { |
468 | int (*n_register) (struct snd_pcm * pcm); | |
469 | int (*n_disconnect) (struct snd_pcm * pcm); | |
470 | int (*n_unregister) (struct snd_pcm * pcm); | |
1da177e4 | 471 | struct list_head list; |
877211f5 | 472 | }; |
1da177e4 LT |
473 | |
474 | /* | |
475 | * Registering | |
476 | */ | |
477 | ||
54047320 | 478 | extern const struct file_operations snd_pcm_f_ops[2]; |
1da177e4 | 479 | |
e6161653 | 480 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
1da177e4 | 481 | int playback_count, int capture_count, |
877211f5 | 482 | struct snd_pcm **rpcm); |
945e5038 LG |
483 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, |
484 | int playback_count, int capture_count, | |
485 | struct snd_pcm **rpcm); | |
877211f5 | 486 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); |
1da177e4 | 487 | |
877211f5 | 488 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
1da177e4 LT |
489 | |
490 | /* | |
491 | * Native I/O | |
492 | */ | |
493 | ||
494 | extern rwlock_t snd_pcm_link_rwlock; | |
495 | ||
877211f5 TI |
496 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
497 | int snd_pcm_info_user(struct snd_pcm_substream *substream, | |
498 | struct snd_pcm_info __user *info); | |
499 | int snd_pcm_status(struct snd_pcm_substream *substream, | |
500 | struct snd_pcm_status *status); | |
877211f5 | 501 | int snd_pcm_start(struct snd_pcm_substream *substream); |
fea952e5 | 502 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status); |
877211f5 | 503 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); |
1da177e4 | 504 | #ifdef CONFIG_PM |
877211f5 TI |
505 | int snd_pcm_suspend(struct snd_pcm_substream *substream); |
506 | int snd_pcm_suspend_all(struct snd_pcm *pcm); | |
1da177e4 | 507 | #endif |
877211f5 | 508 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); |
3bf75f9b TI |
509 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, |
510 | struct snd_pcm_substream **rsubstream); | |
877211f5 | 511 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); |
3bf75f9b TI |
512 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, |
513 | struct snd_pcm_substream **rsubstream); | |
514 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); | |
1da177e4 | 515 | void snd_pcm_vma_notify_data(void *client, void *data); |
877211f5 | 516 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); |
1da177e4 | 517 | |
acb03d44 EB |
518 | |
519 | #ifdef CONFIG_SND_DEBUG | |
520 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
521 | char *name, size_t len); | |
522 | #else | |
523 | static inline void | |
524 | snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size) | |
525 | { | |
526 | *buf = 0; | |
527 | } | |
528 | #endif | |
529 | ||
1da177e4 LT |
530 | /* |
531 | * PCM library | |
532 | */ | |
533 | ||
877211f5 | 534 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) |
1da177e4 LT |
535 | { |
536 | return substream->group != &substream->self_group; | |
537 | } | |
538 | ||
877211f5 | 539 | static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
1da177e4 LT |
540 | { |
541 | read_lock(&snd_pcm_link_rwlock); | |
542 | spin_lock(&substream->self_group.lock); | |
543 | } | |
544 | ||
877211f5 | 545 | static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
1da177e4 LT |
546 | { |
547 | spin_unlock(&substream->self_group.lock); | |
548 | read_unlock(&snd_pcm_link_rwlock); | |
549 | } | |
550 | ||
877211f5 | 551 | static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
1da177e4 LT |
552 | { |
553 | read_lock_irq(&snd_pcm_link_rwlock); | |
554 | spin_lock(&substream->self_group.lock); | |
555 | } | |
556 | ||
877211f5 | 557 | static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
1da177e4 LT |
558 | { |
559 | spin_unlock(&substream->self_group.lock); | |
560 | read_unlock_irq(&snd_pcm_link_rwlock); | |
561 | } | |
562 | ||
563 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ | |
564 | do { \ | |
565 | read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ | |
566 | spin_lock(&substream->self_group.lock); \ | |
567 | } while (0) | |
568 | ||
569 | #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ | |
570 | do { \ | |
571 | spin_unlock(&substream->self_group.lock); \ | |
572 | read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ | |
573 | } while (0) | |
574 | ||
ef991b95 TI |
575 | #define snd_pcm_group_for_each_entry(s, substream) \ |
576 | list_for_each_entry(s, &substream->group->substreams, link_list) | |
1da177e4 | 577 | |
877211f5 | 578 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
1da177e4 LT |
579 | { |
580 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
581 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
582 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); | |
583 | } | |
584 | ||
877211f5 | 585 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
586 | { |
587 | return size * 8 / runtime->sample_bits; | |
588 | } | |
589 | ||
877211f5 | 590 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
591 | { |
592 | return size * 8 / runtime->frame_bits; | |
593 | } | |
594 | ||
877211f5 | 595 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
596 | { |
597 | return size * runtime->sample_bits / 8; | |
598 | } | |
599 | ||
877211f5 | 600 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
1da177e4 LT |
601 | { |
602 | return size * runtime->frame_bits / 8; | |
603 | } | |
604 | ||
877211f5 | 605 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
1da177e4 LT |
606 | { |
607 | return bytes % runtime->byte_align == 0; | |
608 | } | |
609 | ||
877211f5 | 610 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 611 | { |
877211f5 | 612 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
613 | return frames_to_bytes(runtime, runtime->buffer_size); |
614 | } | |
615 | ||
877211f5 | 616 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 617 | { |
877211f5 | 618 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
619 | return frames_to_bytes(runtime, runtime->period_size); |
620 | } | |
621 | ||
622 | /* | |
623 | * result is: 0 ... (boundary - 1) | |
624 | */ | |
877211f5 | 625 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
626 | { |
627 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; | |
628 | if (avail < 0) | |
629 | avail += runtime->boundary; | |
630 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) | |
631 | avail -= runtime->boundary; | |
632 | return avail; | |
633 | } | |
634 | ||
635 | /* | |
636 | * result is: 0 ... (boundary - 1) | |
637 | */ | |
877211f5 | 638 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
639 | { |
640 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; | |
641 | if (avail < 0) | |
642 | avail += runtime->boundary; | |
643 | return avail; | |
644 | } | |
645 | ||
877211f5 | 646 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
647 | { |
648 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); | |
649 | } | |
650 | ||
877211f5 | 651 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
652 | { |
653 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); | |
654 | } | |
655 | ||
656 | /** | |
657 | * snd_pcm_playback_ready - check whether the playback buffer is available | |
658 | * @substream: the pcm substream instance | |
659 | * | |
660 | * Checks whether enough free space is available on the playback buffer. | |
661 | * | |
662 | * Returns non-zero if available, or zero if not. | |
663 | */ | |
877211f5 | 664 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
1da177e4 | 665 | { |
877211f5 | 666 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
667 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
668 | } | |
669 | ||
670 | /** | |
671 | * snd_pcm_capture_ready - check whether the capture buffer is available | |
672 | * @substream: the pcm substream instance | |
673 | * | |
674 | * Checks whether enough capture data is available on the capture buffer. | |
675 | * | |
676 | * Returns non-zero if available, or zero if not. | |
677 | */ | |
877211f5 | 678 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
1da177e4 | 679 | { |
877211f5 | 680 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
681 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
682 | } | |
683 | ||
684 | /** | |
685 | * snd_pcm_playback_data - check whether any data exists on the playback buffer | |
686 | * @substream: the pcm substream instance | |
687 | * | |
688 | * Checks whether any data exists on the playback buffer. If stop_threshold | |
689 | * is bigger or equal to boundary, then this function returns always non-zero. | |
690 | * | |
691 | * Returns non-zero if exists, or zero if not. | |
692 | */ | |
877211f5 | 693 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
1da177e4 | 694 | { |
877211f5 | 695 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
696 | |
697 | if (runtime->stop_threshold >= runtime->boundary) | |
698 | return 1; | |
699 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; | |
700 | } | |
701 | ||
702 | /** | |
703 | * snd_pcm_playback_empty - check whether the playback buffer is empty | |
704 | * @substream: the pcm substream instance | |
705 | * | |
706 | * Checks whether the playback buffer is empty. | |
707 | * | |
708 | * Returns non-zero if empty, or zero if not. | |
709 | */ | |
877211f5 | 710 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
1da177e4 | 711 | { |
877211f5 | 712 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
713 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
714 | } | |
715 | ||
716 | /** | |
717 | * snd_pcm_capture_empty - check whether the capture buffer is empty | |
718 | * @substream: the pcm substream instance | |
719 | * | |
720 | * Checks whether the capture buffer is empty. | |
721 | * | |
722 | * Returns non-zero if empty, or zero if not. | |
723 | */ | |
877211f5 | 724 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
1da177e4 | 725 | { |
877211f5 | 726 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
727 | return snd_pcm_capture_avail(runtime) == 0; |
728 | } | |
729 | ||
877211f5 TI |
730 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
731 | struct snd_pcm_substream *master) | |
1da177e4 LT |
732 | { |
733 | substream->runtime->trigger_master = master; | |
734 | } | |
735 | ||
736 | static inline int hw_is_mask(int var) | |
737 | { | |
738 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && | |
739 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; | |
740 | } | |
741 | ||
742 | static inline int hw_is_interval(int var) | |
743 | { | |
744 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && | |
745 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; | |
746 | } | |
747 | ||
877211f5 | 748 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
1da177e4 LT |
749 | snd_pcm_hw_param_t var) |
750 | { | |
751 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
752 | } | |
753 | ||
877211f5 | 754 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
1da177e4 LT |
755 | snd_pcm_hw_param_t var) |
756 | { | |
757 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
758 | } | |
759 | ||
877211f5 | 760 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
761 | snd_pcm_hw_param_t var) |
762 | { | |
b9f09a48 | 763 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
1da177e4 LT |
764 | } |
765 | ||
877211f5 | 766 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
767 | snd_pcm_hw_param_t var) |
768 | { | |
b9f09a48 | 769 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
1da177e4 LT |
770 | } |
771 | ||
b51beb75 TI |
772 | #define params_channels(p) \ |
773 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min) | |
774 | #define params_rate(p) \ | |
775 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_RATE)->min) | |
776 | #define params_period_size(p) \ | |
777 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min) | |
778 | #define params_periods(p) \ | |
779 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIODS)->min) | |
780 | #define params_buffer_size(p) \ | |
781 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min) | |
782 | #define params_buffer_bytes(p) \ | |
783 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min) | |
1da177e4 | 784 | |
877211f5 TI |
785 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
786 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
787 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
788 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, | |
789 | unsigned int k, struct snd_interval *c); | |
790 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, | |
791 | const struct snd_interval *b, struct snd_interval *c); | |
4af87a93 MB |
792 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
793 | const unsigned int *list, unsigned int mask); | |
877211f5 TI |
794 | int snd_interval_ratnum(struct snd_interval *i, |
795 | unsigned int rats_count, struct snd_ratnum *rats, | |
1da177e4 LT |
796 | unsigned int *nump, unsigned int *denp); |
797 | ||
877211f5 TI |
798 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
799 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); | |
877211f5 | 800 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 801 | |
877211f5 | 802 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 803 | |
877211f5 TI |
804 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
805 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); | |
1da177e4 | 806 | |
877211f5 | 807 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 808 | u_int32_t mask); |
877211f5 | 809 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 810 | u_int64_t mask); |
877211f5 | 811 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 812 | unsigned int min, unsigned int max); |
877211f5 TI |
813 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
814 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
815 | unsigned int cond, |
816 | snd_pcm_hw_param_t var, | |
1464189f | 817 | const struct snd_pcm_hw_constraint_list *l); |
877211f5 | 818 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
819 | unsigned int cond, |
820 | snd_pcm_hw_param_t var, | |
877211f5 TI |
821 | struct snd_pcm_hw_constraint_ratnums *r); |
822 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
823 | unsigned int cond, |
824 | snd_pcm_hw_param_t var, | |
877211f5 TI |
825 | struct snd_pcm_hw_constraint_ratdens *r); |
826 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
827 | unsigned int cond, |
828 | unsigned int width, | |
829 | unsigned int msbits); | |
877211f5 | 830 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
831 | unsigned int cond, |
832 | snd_pcm_hw_param_t var, | |
833 | unsigned long step); | |
877211f5 | 834 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
835 | unsigned int cond, |
836 | snd_pcm_hw_param_t var); | |
d5b702a6 CL |
837 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, |
838 | unsigned int base_rate); | |
877211f5 | 839 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
840 | unsigned int cond, |
841 | int var, | |
842 | snd_pcm_hw_rule_func_t func, void *private, | |
843 | int dep, ...); | |
844 | ||
845 | int snd_pcm_format_signed(snd_pcm_format_t format); | |
846 | int snd_pcm_format_unsigned(snd_pcm_format_t format); | |
847 | int snd_pcm_format_linear(snd_pcm_format_t format); | |
848 | int snd_pcm_format_little_endian(snd_pcm_format_t format); | |
849 | int snd_pcm_format_big_endian(snd_pcm_format_t format); | |
1b44c28d TI |
850 | #if 0 /* just for DocBook */ |
851 | /** | |
9502dcad TI |
852 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
853 | * @format: the format to check | |
854 | * | |
855 | * Returns 1 if the given PCM format is CPU-endian, 0 if | |
856 | * opposite, or a negative error code if endian not specified. | |
857 | */ | |
8cdfd251 | 858 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
1b44c28d | 859 | #endif /* DocBook */ |
9502dcad | 860 | #ifdef SNDRV_LITTLE_ENDIAN |
9d01a82e | 861 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
9502dcad | 862 | #else |
9d01a82e | 863 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
9502dcad | 864 | #endif |
1da177e4 LT |
865 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
866 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ | |
9502dcad | 867 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
1da177e4 LT |
868 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
869 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); | |
870 | snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); | |
1da177e4 | 871 | |
877211f5 TI |
872 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); |
873 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); | |
874 | int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); | |
875 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, | |
1da177e4 | 876 | unsigned int cmd, void *arg); |
1250932e JK |
877 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
878 | struct snd_pcm_runtime *runtime); | |
877211f5 TI |
879 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
880 | int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); | |
881 | int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); | |
882 | int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); | |
883 | int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); | |
884 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); | |
877211f5 TI |
885 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); |
886 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, | |
1da177e4 LT |
887 | const void __user *buf, |
888 | snd_pcm_uframes_t frames); | |
877211f5 | 889 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
1da177e4 | 890 | void __user *buf, snd_pcm_uframes_t frames); |
877211f5 | 891 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 | 892 | void __user **bufs, snd_pcm_uframes_t frames); |
877211f5 | 893 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
894 | void __user **bufs, snd_pcm_uframes_t frames); |
895 | ||
7653d557 CL |
896 | extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; |
897 | ||
877211f5 | 898 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
918f3a0e | 899 | unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); |
4be77a53 | 900 | unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); |
1da177e4 | 901 | |
877211f5 | 902 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
1da177e4 LT |
903 | struct snd_dma_buffer *bufp) |
904 | { | |
877211f5 | 905 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
906 | if (bufp) { |
907 | runtime->dma_buffer_p = bufp; | |
908 | runtime->dma_area = bufp->area; | |
909 | runtime->dma_addr = bufp->addr; | |
910 | runtime->dma_bytes = bufp->bytes; | |
911 | } else { | |
912 | runtime->dma_buffer_p = NULL; | |
913 | runtime->dma_area = NULL; | |
914 | runtime->dma_addr = 0; | |
915 | runtime->dma_bytes = 0; | |
916 | } | |
917 | } | |
918 | ||
919 | /* | |
920 | * Timer interface | |
921 | */ | |
922 | ||
877211f5 TI |
923 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
924 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); | |
925 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); | |
1da177e4 | 926 | |
b751eef1 JK |
927 | static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, |
928 | struct timespec *tv) | |
929 | { | |
930 | if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) | |
931 | do_posix_clock_monotonic_gettime(tv); | |
932 | else | |
933 | getnstimeofday(tv); | |
934 | } | |
935 | ||
1da177e4 LT |
936 | /* |
937 | * Memory | |
938 | */ | |
939 | ||
877211f5 TI |
940 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
941 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); | |
942 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, | |
1da177e4 LT |
943 | int type, struct device *data, |
944 | size_t size, size_t max); | |
877211f5 | 945 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
1da177e4 LT |
946 | int type, void *data, |
947 | size_t size, size_t max); | |
877211f5 TI |
948 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
949 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); | |
1da177e4 | 950 | |
681b84e1 CL |
951 | int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, |
952 | size_t size, gfp_t gfp_flags); | |
953 | int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); | |
954 | struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, | |
955 | unsigned long offset); | |
956 | #if 0 /* for kernel-doc */ | |
957 | /** | |
958 | * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer | |
959 | * @substream: the substream to allocate the buffer to | |
960 | * @size: the requested buffer size, in bytes | |
961 | * | |
962 | * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is | |
963 | * contiguous in kernel virtual space, but not in physical memory. Use this | |
964 | * if the buffer is accessed by kernel code but not by device DMA. | |
965 | * | |
966 | * Returns 1 if the buffer was changed, 0 if not changed, or a negative error | |
967 | * code. | |
968 | */ | |
969 | static int snd_pcm_lib_alloc_vmalloc_buffer | |
970 | (struct snd_pcm_substream *substream, size_t size); | |
971 | /** | |
972 | * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer | |
973 | * @substream: the substream to allocate the buffer to | |
974 | * @size: the requested buffer size, in bytes | |
975 | * | |
976 | * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses | |
977 | * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. | |
978 | */ | |
979 | static int snd_pcm_lib_alloc_vmalloc_32_buffer | |
980 | (struct snd_pcm_substream *substream, size_t size); | |
981 | #endif | |
982 | #define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \ | |
983 | _snd_pcm_lib_alloc_vmalloc_buffer \ | |
984 | (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO) | |
985 | #define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \ | |
986 | _snd_pcm_lib_alloc_vmalloc_buffer \ | |
987 | (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO) | |
988 | ||
9d069dc0 TI |
989 | #define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p) |
990 | ||
cc6a8acd | 991 | #ifdef CONFIG_SND_DMA_SGBUF |
77a23f26 TI |
992 | /* |
993 | * SG-buffer handling | |
994 | */ | |
995 | #define snd_pcm_substream_sgbuf(substream) \ | |
9d069dc0 | 996 | snd_pcm_get_dma_buf(substream)->private_data |
77a23f26 TI |
997 | |
998 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, | |
999 | unsigned long offset); | |
cc6a8acd TI |
1000 | #else /* !SND_DMA_SGBUF */ |
1001 | /* | |
1002 | * fake using a continuous buffer | |
1003 | */ | |
9d069dc0 TI |
1004 | #define snd_pcm_sgbuf_ops_page NULL |
1005 | #endif /* SND_DMA_SGBUF */ | |
1006 | ||
cc6a8acd TI |
1007 | static inline dma_addr_t |
1008 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) | |
1009 | { | |
9d069dc0 | 1010 | return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs); |
cc6a8acd TI |
1011 | } |
1012 | ||
1013 | static inline void * | |
1014 | snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) | |
1015 | { | |
9d069dc0 | 1016 | return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs); |
cc6a8acd TI |
1017 | } |
1018 | ||
9d069dc0 TI |
1019 | static inline unsigned int |
1020 | snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, | |
1021 | unsigned int ofs, unsigned int size) | |
1022 | { | |
1023 | return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size); | |
1024 | } | |
cc6a8acd | 1025 | |
1da177e4 LT |
1026 | /* handle mmap counter - PCM mmap callback should handle this counter properly */ |
1027 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) | |
1028 | { | |
877211f5 | 1029 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 1030 | atomic_inc(&substream->mmap_count); |
1da177e4 LT |
1031 | } |
1032 | ||
1033 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) | |
1034 | { | |
877211f5 | 1035 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 1036 | atomic_dec(&substream->mmap_count); |
1da177e4 LT |
1037 | } |
1038 | ||
18a2b962 TI |
1039 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
1040 | struct vm_area_struct *area); | |
1da177e4 LT |
1041 | /* mmap for io-memory area */ |
1042 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
1043 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP | |
877211f5 | 1044 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
1da177e4 LT |
1045 | #else |
1046 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 | |
1047 | #define snd_pcm_lib_mmap_iomem NULL | |
1048 | #endif | |
1049 | ||
3674f19d | 1050 | #define snd_pcm_lib_mmap_vmalloc NULL |
c32d977b | 1051 | |
1da177e4 LT |
1052 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) |
1053 | { | |
1054 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; | |
1055 | } | |
1056 | ||
1057 | /* | |
1058 | * Misc | |
1059 | */ | |
1060 | ||
1061 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ | |
1062 | (IEC958_AES1_CON_ORIGINAL<<8)|\ | |
1063 | (IEC958_AES1_CON_PCM_CODER<<8)|\ | |
1064 | (IEC958_AES3_CON_FS_48000<<24)) | |
1065 | ||
7eaa943c TI |
1066 | #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) |
1067 | ||
6e5265ec TI |
1068 | const char *snd_pcm_format_name(snd_pcm_format_t format); |
1069 | ||
1aad779f | 1070 | /** |
8513915a RD |
1071 | * snd_pcm_stream_str - Get a string naming the direction of a stream |
1072 | * @substream: the pcm substream instance | |
1aad779f OL |
1073 | */ |
1074 | static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream) | |
1075 | { | |
1076 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
1077 | return "Playback"; | |
1078 | else | |
1079 | return "Capture"; | |
1080 | } | |
1081 | ||
2d3391ec TI |
1082 | /* |
1083 | * PCM channel-mapping control API | |
1084 | */ | |
1085 | /* array element of channel maps */ | |
1086 | struct snd_pcm_chmap_elem { | |
1087 | unsigned char channels; | |
1088 | unsigned char map[15]; | |
1089 | }; | |
1090 | ||
1091 | /* channel map information; retrieved via snd_kcontrol_chip() */ | |
1092 | struct snd_pcm_chmap { | |
1093 | struct snd_pcm *pcm; /* assigned PCM instance */ | |
1094 | int stream; /* PLAYBACK or CAPTURE */ | |
1095 | struct snd_kcontrol *kctl; | |
1096 | const struct snd_pcm_chmap_elem *chmap; | |
1097 | unsigned int max_channels; | |
1098 | unsigned int channel_mask; /* optional: active channels bitmask */ | |
1099 | void *private_data; /* optional: private data pointer */ | |
1100 | }; | |
1101 | ||
1102 | /* get the PCM substream assigned to the given chmap info */ | |
1103 | static inline struct snd_pcm_substream * | |
1104 | snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) | |
1105 | { | |
1106 | struct snd_pcm_substream *s; | |
1107 | for (s = info->pcm->streams[info->stream].substream; s; s = s->next) | |
1108 | if (s->number == idx) | |
1109 | return s; | |
1110 | return NULL; | |
1111 | } | |
1112 | ||
1113 | /* ALSA-standard channel maps (RL/RR prior to C/LFE) */ | |
1114 | extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[]; | |
1115 | /* Other world's standard channel maps (C/LFE prior to RL/RR) */ | |
1116 | extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[]; | |
1117 | ||
1118 | /* bit masks to be passed to snd_pcm_chmap.channel_mask field */ | |
1119 | #define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4)) | |
1120 | #define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6)) | |
1121 | #define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8)) | |
1122 | ||
1123 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
1124 | const struct snd_pcm_chmap_elem *chmap, | |
1125 | int max_channels, | |
1126 | unsigned long private_value, | |
1127 | struct snd_pcm_chmap **info_ret); | |
1128 | ||
1da177e4 | 1129 | #endif /* __SOUND_PCM_H */ |