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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) | |
ef7a4f97 DM |
184 | #define SNDRV_PCM_FMTBIT_DSD_U8 _SNDRV_PCM_FMTBIT(DSD_U8) |
185 | #define SNDRV_PCM_FMTBIT_DSD_U16_LE _SNDRV_PCM_FMTBIT(DSD_U16_LE) | |
1da177e4 LT |
186 | |
187 | #ifdef SNDRV_LITTLE_ENDIAN | |
188 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE | |
189 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE | |
190 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE | |
191 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE | |
192 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE | |
193 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE | |
194 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE | |
195 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE | |
196 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | |
197 | #endif | |
198 | #ifdef SNDRV_BIG_ENDIAN | |
199 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE | |
200 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE | |
201 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE | |
202 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE | |
203 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE | |
204 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE | |
205 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE | |
206 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE | |
207 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE | |
208 | #endif | |
209 | ||
877211f5 TI |
210 | struct snd_pcm_file { |
211 | struct snd_pcm_substream *substream; | |
548a648b | 212 | int no_compat_mmap; |
1da177e4 LT |
213 | }; |
214 | ||
877211f5 TI |
215 | struct snd_pcm_hw_rule; |
216 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, | |
217 | struct snd_pcm_hw_rule *rule); | |
1da177e4 | 218 | |
877211f5 | 219 | struct snd_pcm_hw_rule { |
1da177e4 LT |
220 | unsigned int cond; |
221 | snd_pcm_hw_rule_func_t func; | |
222 | int var; | |
223 | int deps[4]; | |
224 | void *private; | |
225 | }; | |
226 | ||
877211f5 TI |
227 | struct snd_pcm_hw_constraints { |
228 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - | |
1da177e4 | 229 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
877211f5 | 230 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
1da177e4 LT |
231 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
232 | unsigned int rules_num; | |
233 | unsigned int rules_all; | |
877211f5 TI |
234 | struct snd_pcm_hw_rule *rules; |
235 | }; | |
1da177e4 | 236 | |
877211f5 TI |
237 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
238 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
239 | { |
240 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
241 | } | |
242 | ||
877211f5 TI |
243 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
244 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
245 | { |
246 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
247 | } | |
248 | ||
877211f5 | 249 | struct snd_ratnum { |
1da177e4 LT |
250 | unsigned int num; |
251 | unsigned int den_min, den_max, den_step; | |
877211f5 | 252 | }; |
1da177e4 | 253 | |
877211f5 | 254 | struct snd_ratden { |
1da177e4 LT |
255 | unsigned int num_min, num_max, num_step; |
256 | unsigned int den; | |
877211f5 | 257 | }; |
1da177e4 | 258 | |
877211f5 | 259 | struct snd_pcm_hw_constraint_ratnums { |
1da177e4 | 260 | int nrats; |
877211f5 TI |
261 | struct snd_ratnum *rats; |
262 | }; | |
1da177e4 | 263 | |
877211f5 | 264 | struct snd_pcm_hw_constraint_ratdens { |
1da177e4 | 265 | int nrats; |
877211f5 TI |
266 | struct snd_ratden *rats; |
267 | }; | |
1da177e4 | 268 | |
877211f5 | 269 | struct snd_pcm_hw_constraint_list { |
1da177e4 | 270 | unsigned int count; |
4af87a93 | 271 | const unsigned int *list; |
1da177e4 | 272 | unsigned int mask; |
877211f5 | 273 | }; |
1da177e4 | 274 | |
4d96eb25 JK |
275 | struct snd_pcm_hwptr_log; |
276 | ||
877211f5 | 277 | struct snd_pcm_runtime { |
1da177e4 | 278 | /* -- Status -- */ |
877211f5 | 279 | struct snd_pcm_substream *trigger_master; |
07799e75 | 280 | struct timespec trigger_tstamp; /* trigger timestamp */ |
1da177e4 LT |
281 | int overrange; |
282 | snd_pcm_uframes_t avail_max; | |
283 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ | |
e7636925 | 284 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ |
bbf6ad13 | 285 | unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ |
bd76af0f | 286 | unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ |
4bbe1ddf | 287 | snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ |
0e8014d7 | 288 | u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */ |
1da177e4 LT |
289 | |
290 | /* -- HW params -- */ | |
291 | snd_pcm_access_t access; /* access mode */ | |
292 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ | |
293 | snd_pcm_subformat_t subformat; /* subformat */ | |
294 | unsigned int rate; /* rate in Hz */ | |
295 | unsigned int channels; /* channels */ | |
296 | snd_pcm_uframes_t period_size; /* period size */ | |
297 | unsigned int periods; /* periods */ | |
298 | snd_pcm_uframes_t buffer_size; /* buffer size */ | |
1da177e4 LT |
299 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ |
300 | size_t byte_align; | |
301 | unsigned int frame_bits; | |
302 | unsigned int sample_bits; | |
303 | unsigned int info; | |
304 | unsigned int rate_num; | |
305 | unsigned int rate_den; | |
ab69a490 | 306 | unsigned int no_period_wakeup: 1; |
1da177e4 LT |
307 | |
308 | /* -- SW params -- */ | |
877211f5 | 309 | int tstamp_mode; /* mmap timestamp is updated */ |
1da177e4 | 310 | unsigned int period_step; |
1da177e4 LT |
311 | snd_pcm_uframes_t start_threshold; |
312 | snd_pcm_uframes_t stop_threshold; | |
313 | snd_pcm_uframes_t silence_threshold; /* Silence filling happens when | |
314 | noise is nearest than this */ | |
315 | snd_pcm_uframes_t silence_size; /* Silence filling size */ | |
316 | snd_pcm_uframes_t boundary; /* pointers wrap point */ | |
317 | ||
318 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ | |
319 | snd_pcm_uframes_t silence_filled; /* size filled with silence */ | |
320 | ||
877211f5 | 321 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ |
1da177e4 LT |
322 | |
323 | /* -- mmap -- */ | |
503fc85a TI |
324 | struct snd_pcm_mmap_status *status; |
325 | struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
326 | |
327 | /* -- locking / scheduling -- */ | |
5daeba34 | 328 | snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ |
c91a988d JK |
329 | wait_queue_head_t sleep; /* poll sleep */ |
330 | wait_queue_head_t tsleep; /* transfer sleep */ | |
1da177e4 LT |
331 | struct fasync_struct *fasync; |
332 | ||
333 | /* -- private section -- */ | |
334 | void *private_data; | |
877211f5 | 335 | void (*private_free)(struct snd_pcm_runtime *runtime); |
1da177e4 LT |
336 | |
337 | /* -- hardware description -- */ | |
877211f5 TI |
338 | struct snd_pcm_hardware hw; |
339 | struct snd_pcm_hw_constraints hw_constraints; | |
1da177e4 LT |
340 | |
341 | /* -- interrupt callbacks -- */ | |
877211f5 TI |
342 | void (*transfer_ack_begin)(struct snd_pcm_substream *substream); |
343 | void (*transfer_ack_end)(struct snd_pcm_substream *substream); | |
1da177e4 LT |
344 | |
345 | /* -- timer -- */ | |
346 | unsigned int timer_resolution; /* timer resolution */ | |
b751eef1 | 347 | int tstamp_type; /* timestamp type */ |
1da177e4 LT |
348 | |
349 | /* -- DMA -- */ | |
350 | unsigned char *dma_area; /* DMA area */ | |
351 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ | |
352 | size_t dma_bytes; /* size of DMA area */ | |
353 | ||
354 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ | |
355 | ||
356 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
357 | /* -- OSS things -- */ | |
877211f5 | 358 | struct snd_pcm_oss_runtime oss; |
1da177e4 | 359 | #endif |
4d96eb25 JK |
360 | |
361 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG | |
362 | struct snd_pcm_hwptr_log *hwptr_log; | |
363 | #endif | |
1da177e4 LT |
364 | }; |
365 | ||
877211f5 | 366 | struct snd_pcm_group { /* keep linked substreams */ |
1da177e4 LT |
367 | spinlock_t lock; |
368 | struct list_head substreams; | |
369 | int count; | |
877211f5 | 370 | }; |
1da177e4 | 371 | |
e7373b70 CL |
372 | struct pid; |
373 | ||
877211f5 TI |
374 | struct snd_pcm_substream { |
375 | struct snd_pcm *pcm; | |
376 | struct snd_pcm_str *pstr; | |
1da177e4 LT |
377 | void *private_data; /* copied from pcm->private_data */ |
378 | int number; | |
379 | char name[32]; /* substream name */ | |
380 | int stream; /* stream (direction) */ | |
cc749986 | 381 | struct pm_qos_request latency_pm_qos_req; /* pm_qos request */ |
1da177e4 LT |
382 | size_t buffer_bytes_max; /* limit ring buffer size */ |
383 | struct snd_dma_buffer dma_buffer; | |
1da177e4 LT |
384 | size_t dma_max; |
385 | /* -- hardware operations -- */ | |
e6c2e7eb | 386 | const struct snd_pcm_ops *ops; |
1da177e4 | 387 | /* -- runtime information -- */ |
877211f5 | 388 | struct snd_pcm_runtime *runtime; |
1da177e4 | 389 | /* -- timer section -- */ |
877211f5 | 390 | struct snd_timer *timer; /* timer */ |
1da177e4 | 391 | unsigned timer_running: 1; /* time is running */ |
1da177e4 | 392 | /* -- next substream -- */ |
877211f5 | 393 | struct snd_pcm_substream *next; |
1da177e4 LT |
394 | /* -- linked substreams -- */ |
395 | struct list_head link_list; /* linked list member */ | |
877211f5 TI |
396 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ |
397 | struct snd_pcm_group *group; /* pointer to current group */ | |
1da177e4 | 398 | /* -- assigned files -- */ |
1576274d | 399 | void *file; |
0df63e44 | 400 | int ref_count; |
9c323fcb | 401 | atomic_t mmap_count; |
0df63e44 | 402 | unsigned int f_flags; |
3bf75f9b | 403 | void (*pcm_release)(struct snd_pcm_substream *); |
e7373b70 | 404 | struct pid *pid; |
1da177e4 LT |
405 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
406 | /* -- OSS things -- */ | |
877211f5 | 407 | struct snd_pcm_oss_substream oss; |
1da177e4 | 408 | #endif |
b7d90a35 | 409 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
410 | struct snd_info_entry *proc_root; |
411 | struct snd_info_entry *proc_info_entry; | |
412 | struct snd_info_entry *proc_hw_params_entry; | |
413 | struct snd_info_entry *proc_sw_params_entry; | |
414 | struct snd_info_entry *proc_status_entry; | |
415 | struct snd_info_entry *proc_prealloc_entry; | |
c7132aeb | 416 | struct snd_info_entry *proc_prealloc_max_entry; |
b7d90a35 | 417 | #endif |
1da177e4 | 418 | /* misc flags */ |
3bf75f9b | 419 | unsigned int hw_opened: 1; |
1da177e4 LT |
420 | }; |
421 | ||
0df63e44 | 422 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
1da177e4 LT |
423 | |
424 | ||
877211f5 | 425 | struct snd_pcm_str { |
1da177e4 | 426 | int stream; /* stream (direction) */ |
877211f5 | 427 | struct snd_pcm *pcm; |
1da177e4 LT |
428 | /* -- substreams -- */ |
429 | unsigned int substream_count; | |
430 | unsigned int substream_opened; | |
877211f5 | 431 | struct snd_pcm_substream *substream; |
1da177e4 LT |
432 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
433 | /* -- OSS things -- */ | |
877211f5 | 434 | struct snd_pcm_oss_stream oss; |
1da177e4 | 435 | #endif |
b7d90a35 | 436 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
437 | struct snd_info_entry *proc_root; |
438 | struct snd_info_entry *proc_info_entry; | |
b7d90a35 | 439 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
1da177e4 | 440 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ |
877211f5 | 441 | struct snd_info_entry *proc_xrun_debug_entry; |
1da177e4 | 442 | #endif |
b7d90a35 | 443 | #endif |
2d3391ec | 444 | struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */ |
1da177e4 LT |
445 | }; |
446 | ||
877211f5 TI |
447 | struct snd_pcm { |
448 | struct snd_card *card; | |
f87135f5 | 449 | struct list_head list; |
f90c06a2 | 450 | int device; /* device number */ |
1da177e4 LT |
451 | unsigned int info_flags; |
452 | unsigned short dev_class; | |
453 | unsigned short dev_subclass; | |
454 | char id[64]; | |
455 | char name[80]; | |
877211f5 | 456 | struct snd_pcm_str streams[2]; |
1a60d4c5 | 457 | struct mutex open_mutex; |
1da177e4 LT |
458 | wait_queue_head_t open_wait; |
459 | void *private_data; | |
877211f5 | 460 | void (*private_free) (struct snd_pcm *pcm); |
c78085fc | 461 | struct device *dev; /* actual hw device this belongs to */ |
945e5038 | 462 | bool internal; /* pcm is for internal use only */ |
1da177e4 | 463 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 464 | struct snd_pcm_oss oss; |
1da177e4 LT |
465 | #endif |
466 | }; | |
467 | ||
877211f5 TI |
468 | struct snd_pcm_notify { |
469 | int (*n_register) (struct snd_pcm * pcm); | |
470 | int (*n_disconnect) (struct snd_pcm * pcm); | |
471 | int (*n_unregister) (struct snd_pcm * pcm); | |
1da177e4 | 472 | struct list_head list; |
877211f5 | 473 | }; |
1da177e4 LT |
474 | |
475 | /* | |
476 | * Registering | |
477 | */ | |
478 | ||
54047320 | 479 | extern const struct file_operations snd_pcm_f_ops[2]; |
1da177e4 | 480 | |
e6161653 | 481 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
1da177e4 | 482 | int playback_count, int capture_count, |
877211f5 | 483 | struct snd_pcm **rpcm); |
945e5038 LG |
484 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, |
485 | int playback_count, int capture_count, | |
486 | struct snd_pcm **rpcm); | |
877211f5 | 487 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); |
1da177e4 | 488 | |
877211f5 | 489 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
1da177e4 LT |
490 | |
491 | /* | |
492 | * Native I/O | |
493 | */ | |
494 | ||
495 | extern rwlock_t snd_pcm_link_rwlock; | |
496 | ||
877211f5 TI |
497 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
498 | int snd_pcm_info_user(struct snd_pcm_substream *substream, | |
499 | struct snd_pcm_info __user *info); | |
500 | int snd_pcm_status(struct snd_pcm_substream *substream, | |
501 | struct snd_pcm_status *status); | |
877211f5 | 502 | int snd_pcm_start(struct snd_pcm_substream *substream); |
fea952e5 | 503 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status); |
877211f5 | 504 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); |
1da177e4 | 505 | #ifdef CONFIG_PM |
877211f5 TI |
506 | int snd_pcm_suspend(struct snd_pcm_substream *substream); |
507 | int snd_pcm_suspend_all(struct snd_pcm *pcm); | |
1da177e4 | 508 | #endif |
877211f5 | 509 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); |
3bf75f9b TI |
510 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, |
511 | struct snd_pcm_substream **rsubstream); | |
877211f5 | 512 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); |
3bf75f9b TI |
513 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, |
514 | struct snd_pcm_substream **rsubstream); | |
515 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); | |
1da177e4 | 516 | void snd_pcm_vma_notify_data(void *client, void *data); |
877211f5 | 517 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); |
1da177e4 | 518 | |
acb03d44 EB |
519 | |
520 | #ifdef CONFIG_SND_DEBUG | |
521 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
522 | char *name, size_t len); | |
523 | #else | |
524 | static inline void | |
525 | snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size) | |
526 | { | |
527 | *buf = 0; | |
528 | } | |
529 | #endif | |
530 | ||
1da177e4 LT |
531 | /* |
532 | * PCM library | |
533 | */ | |
534 | ||
877211f5 | 535 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) |
1da177e4 LT |
536 | { |
537 | return substream->group != &substream->self_group; | |
538 | } | |
539 | ||
877211f5 | 540 | static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
1da177e4 LT |
541 | { |
542 | read_lock(&snd_pcm_link_rwlock); | |
543 | spin_lock(&substream->self_group.lock); | |
544 | } | |
545 | ||
877211f5 | 546 | static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
1da177e4 LT |
547 | { |
548 | spin_unlock(&substream->self_group.lock); | |
549 | read_unlock(&snd_pcm_link_rwlock); | |
550 | } | |
551 | ||
877211f5 | 552 | static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
1da177e4 LT |
553 | { |
554 | read_lock_irq(&snd_pcm_link_rwlock); | |
555 | spin_lock(&substream->self_group.lock); | |
556 | } | |
557 | ||
877211f5 | 558 | static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
1da177e4 LT |
559 | { |
560 | spin_unlock(&substream->self_group.lock); | |
561 | read_unlock_irq(&snd_pcm_link_rwlock); | |
562 | } | |
563 | ||
564 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ | |
565 | do { \ | |
566 | read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ | |
567 | spin_lock(&substream->self_group.lock); \ | |
568 | } while (0) | |
569 | ||
570 | #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ | |
571 | do { \ | |
572 | spin_unlock(&substream->self_group.lock); \ | |
573 | read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ | |
574 | } while (0) | |
575 | ||
ef991b95 TI |
576 | #define snd_pcm_group_for_each_entry(s, substream) \ |
577 | list_for_each_entry(s, &substream->group->substreams, link_list) | |
1da177e4 | 578 | |
877211f5 | 579 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
1da177e4 LT |
580 | { |
581 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
582 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
583 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); | |
584 | } | |
585 | ||
877211f5 | 586 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
587 | { |
588 | return size * 8 / runtime->sample_bits; | |
589 | } | |
590 | ||
877211f5 | 591 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
592 | { |
593 | return size * 8 / runtime->frame_bits; | |
594 | } | |
595 | ||
877211f5 | 596 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
597 | { |
598 | return size * runtime->sample_bits / 8; | |
599 | } | |
600 | ||
877211f5 | 601 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
1da177e4 LT |
602 | { |
603 | return size * runtime->frame_bits / 8; | |
604 | } | |
605 | ||
877211f5 | 606 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
1da177e4 LT |
607 | { |
608 | return bytes % runtime->byte_align == 0; | |
609 | } | |
610 | ||
877211f5 | 611 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 612 | { |
877211f5 | 613 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
614 | return frames_to_bytes(runtime, runtime->buffer_size); |
615 | } | |
616 | ||
877211f5 | 617 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 618 | { |
877211f5 | 619 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
620 | return frames_to_bytes(runtime, runtime->period_size); |
621 | } | |
622 | ||
623 | /* | |
624 | * result is: 0 ... (boundary - 1) | |
625 | */ | |
877211f5 | 626 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
627 | { |
628 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; | |
629 | if (avail < 0) | |
630 | avail += runtime->boundary; | |
631 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) | |
632 | avail -= runtime->boundary; | |
633 | return avail; | |
634 | } | |
635 | ||
636 | /* | |
637 | * result is: 0 ... (boundary - 1) | |
638 | */ | |
877211f5 | 639 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
640 | { |
641 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; | |
642 | if (avail < 0) | |
643 | avail += runtime->boundary; | |
644 | return avail; | |
645 | } | |
646 | ||
877211f5 | 647 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
648 | { |
649 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); | |
650 | } | |
651 | ||
877211f5 | 652 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
653 | { |
654 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); | |
655 | } | |
656 | ||
657 | /** | |
658 | * snd_pcm_playback_ready - check whether the playback buffer is available | |
659 | * @substream: the pcm substream instance | |
660 | * | |
661 | * Checks whether enough free space is available on the playback buffer. | |
662 | * | |
eb7c06e8 | 663 | * Return: Non-zero if available, or zero if not. |
1da177e4 | 664 | */ |
877211f5 | 665 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
1da177e4 | 666 | { |
877211f5 | 667 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
668 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
669 | } | |
670 | ||
671 | /** | |
672 | * snd_pcm_capture_ready - check whether the capture buffer is available | |
673 | * @substream: the pcm substream instance | |
674 | * | |
675 | * Checks whether enough capture data is available on the capture buffer. | |
676 | * | |
eb7c06e8 | 677 | * Return: Non-zero if available, or zero if not. |
1da177e4 | 678 | */ |
877211f5 | 679 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
1da177e4 | 680 | { |
877211f5 | 681 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
682 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
683 | } | |
684 | ||
685 | /** | |
686 | * snd_pcm_playback_data - check whether any data exists on the playback buffer | |
687 | * @substream: the pcm substream instance | |
688 | * | |
eb7c06e8 | 689 | * Checks whether any data exists on the playback buffer. |
1da177e4 | 690 | * |
eb7c06e8 YB |
691 | * Return: Non-zero if any data exists, or zero if not. If stop_threshold |
692 | * is bigger or equal to boundary, then this function returns always non-zero. | |
1da177e4 | 693 | */ |
877211f5 | 694 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
1da177e4 | 695 | { |
877211f5 | 696 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
697 | |
698 | if (runtime->stop_threshold >= runtime->boundary) | |
699 | return 1; | |
700 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; | |
701 | } | |
702 | ||
703 | /** | |
704 | * snd_pcm_playback_empty - check whether the playback buffer is empty | |
705 | * @substream: the pcm substream instance | |
706 | * | |
707 | * Checks whether the playback buffer is empty. | |
708 | * | |
eb7c06e8 | 709 | * Return: Non-zero if empty, or zero if not. |
1da177e4 | 710 | */ |
877211f5 | 711 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
1da177e4 | 712 | { |
877211f5 | 713 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
714 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
715 | } | |
716 | ||
717 | /** | |
718 | * snd_pcm_capture_empty - check whether the capture buffer is empty | |
719 | * @substream: the pcm substream instance | |
720 | * | |
721 | * Checks whether the capture buffer is empty. | |
722 | * | |
eb7c06e8 | 723 | * Return: Non-zero if empty, or zero if not. |
1da177e4 | 724 | */ |
877211f5 | 725 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
1da177e4 | 726 | { |
877211f5 | 727 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
728 | return snd_pcm_capture_avail(runtime) == 0; |
729 | } | |
730 | ||
877211f5 TI |
731 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
732 | struct snd_pcm_substream *master) | |
1da177e4 LT |
733 | { |
734 | substream->runtime->trigger_master = master; | |
735 | } | |
736 | ||
737 | static inline int hw_is_mask(int var) | |
738 | { | |
739 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && | |
740 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; | |
741 | } | |
742 | ||
743 | static inline int hw_is_interval(int var) | |
744 | { | |
745 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && | |
746 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; | |
747 | } | |
748 | ||
877211f5 | 749 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
1da177e4 LT |
750 | snd_pcm_hw_param_t var) |
751 | { | |
752 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
753 | } | |
754 | ||
877211f5 | 755 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
1da177e4 LT |
756 | snd_pcm_hw_param_t var) |
757 | { | |
758 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
759 | } | |
760 | ||
877211f5 | 761 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
762 | snd_pcm_hw_param_t var) |
763 | { | |
b9f09a48 | 764 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
1da177e4 LT |
765 | } |
766 | ||
877211f5 | 767 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
768 | snd_pcm_hw_param_t var) |
769 | { | |
b9f09a48 | 770 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
1da177e4 LT |
771 | } |
772 | ||
b51beb75 TI |
773 | #define params_channels(p) \ |
774 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min) | |
775 | #define params_rate(p) \ | |
776 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_RATE)->min) | |
777 | #define params_period_size(p) \ | |
778 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min) | |
779 | #define params_periods(p) \ | |
780 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIODS)->min) | |
781 | #define params_buffer_size(p) \ | |
782 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min) | |
783 | #define params_buffer_bytes(p) \ | |
784 | (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min) | |
1da177e4 | 785 | |
877211f5 TI |
786 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
787 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
788 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
789 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, | |
790 | unsigned int k, struct snd_interval *c); | |
791 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, | |
792 | const struct snd_interval *b, struct snd_interval *c); | |
4af87a93 MB |
793 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
794 | const unsigned int *list, unsigned int mask); | |
877211f5 TI |
795 | int snd_interval_ratnum(struct snd_interval *i, |
796 | unsigned int rats_count, struct snd_ratnum *rats, | |
1da177e4 LT |
797 | unsigned int *nump, unsigned int *denp); |
798 | ||
877211f5 TI |
799 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
800 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); | |
877211f5 | 801 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 802 | |
877211f5 | 803 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 804 | |
877211f5 TI |
805 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
806 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); | |
1da177e4 | 807 | |
877211f5 | 808 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 809 | u_int32_t mask); |
877211f5 | 810 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 811 | u_int64_t mask); |
877211f5 | 812 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 813 | unsigned int min, unsigned int max); |
877211f5 TI |
814 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
815 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
816 | unsigned int cond, |
817 | snd_pcm_hw_param_t var, | |
1464189f | 818 | const struct snd_pcm_hw_constraint_list *l); |
877211f5 | 819 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
820 | unsigned int cond, |
821 | snd_pcm_hw_param_t var, | |
877211f5 TI |
822 | struct snd_pcm_hw_constraint_ratnums *r); |
823 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
824 | unsigned int cond, |
825 | snd_pcm_hw_param_t var, | |
877211f5 TI |
826 | struct snd_pcm_hw_constraint_ratdens *r); |
827 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
828 | unsigned int cond, |
829 | unsigned int width, | |
830 | unsigned int msbits); | |
877211f5 | 831 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
832 | unsigned int cond, |
833 | snd_pcm_hw_param_t var, | |
834 | unsigned long step); | |
877211f5 | 835 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
836 | unsigned int cond, |
837 | snd_pcm_hw_param_t var); | |
d5b702a6 CL |
838 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, |
839 | unsigned int base_rate); | |
877211f5 | 840 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
841 | unsigned int cond, |
842 | int var, | |
843 | snd_pcm_hw_rule_func_t func, void *private, | |
844 | int dep, ...); | |
845 | ||
846 | int snd_pcm_format_signed(snd_pcm_format_t format); | |
847 | int snd_pcm_format_unsigned(snd_pcm_format_t format); | |
848 | int snd_pcm_format_linear(snd_pcm_format_t format); | |
849 | int snd_pcm_format_little_endian(snd_pcm_format_t format); | |
850 | int snd_pcm_format_big_endian(snd_pcm_format_t format); | |
1b44c28d TI |
851 | #if 0 /* just for DocBook */ |
852 | /** | |
9502dcad TI |
853 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
854 | * @format: the format to check | |
855 | * | |
eb7c06e8 | 856 | * Return: 1 if the given PCM format is CPU-endian, 0 if |
9502dcad TI |
857 | * opposite, or a negative error code if endian not specified. |
858 | */ | |
8cdfd251 | 859 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
1b44c28d | 860 | #endif /* DocBook */ |
9502dcad | 861 | #ifdef SNDRV_LITTLE_ENDIAN |
9d01a82e | 862 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
9502dcad | 863 | #else |
9d01a82e | 864 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
9502dcad | 865 | #endif |
1da177e4 LT |
866 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
867 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ | |
9502dcad | 868 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
1da177e4 LT |
869 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
870 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); | |
b23f7a09 | 871 | snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsigned, int big_endian); |
1da177e4 | 872 | |
e6c2e7eb LPC |
873 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, |
874 | const struct snd_pcm_ops *ops); | |
877211f5 TI |
875 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); |
876 | int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); | |
877 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, | |
1da177e4 | 878 | unsigned int cmd, void *arg); |
1250932e JK |
879 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
880 | struct snd_pcm_runtime *runtime); | |
877211f5 TI |
881 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
882 | int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); | |
883 | int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); | |
884 | int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); | |
885 | int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); | |
886 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); | |
877211f5 TI |
887 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); |
888 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, | |
1da177e4 LT |
889 | const void __user *buf, |
890 | snd_pcm_uframes_t frames); | |
877211f5 | 891 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
1da177e4 | 892 | void __user *buf, snd_pcm_uframes_t frames); |
877211f5 | 893 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 | 894 | void __user **bufs, snd_pcm_uframes_t frames); |
877211f5 | 895 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
896 | void __user **bufs, snd_pcm_uframes_t frames); |
897 | ||
7653d557 CL |
898 | extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; |
899 | ||
877211f5 | 900 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
918f3a0e | 901 | unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); |
4be77a53 | 902 | unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); |
e3a9269f LPC |
903 | unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a, |
904 | unsigned int rates_b); | |
1da177e4 | 905 | |
877211f5 | 906 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
1da177e4 LT |
907 | struct snd_dma_buffer *bufp) |
908 | { | |
877211f5 | 909 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
910 | if (bufp) { |
911 | runtime->dma_buffer_p = bufp; | |
912 | runtime->dma_area = bufp->area; | |
913 | runtime->dma_addr = bufp->addr; | |
914 | runtime->dma_bytes = bufp->bytes; | |
915 | } else { | |
916 | runtime->dma_buffer_p = NULL; | |
917 | runtime->dma_area = NULL; | |
918 | runtime->dma_addr = 0; | |
919 | runtime->dma_bytes = 0; | |
920 | } | |
921 | } | |
922 | ||
923 | /* | |
924 | * Timer interface | |
925 | */ | |
926 | ||
877211f5 TI |
927 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
928 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); | |
929 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); | |
1da177e4 | 930 | |
b751eef1 JK |
931 | static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, |
932 | struct timespec *tv) | |
933 | { | |
934 | if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) | |
935 | do_posix_clock_monotonic_gettime(tv); | |
936 | else | |
937 | getnstimeofday(tv); | |
938 | } | |
939 | ||
1da177e4 LT |
940 | /* |
941 | * Memory | |
942 | */ | |
943 | ||
877211f5 TI |
944 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
945 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); | |
946 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, | |
1da177e4 LT |
947 | int type, struct device *data, |
948 | size_t size, size_t max); | |
877211f5 | 949 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
1da177e4 LT |
950 | int type, void *data, |
951 | size_t size, size_t max); | |
877211f5 TI |
952 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
953 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); | |
1da177e4 | 954 | |
681b84e1 CL |
955 | int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, |
956 | size_t size, gfp_t gfp_flags); | |
957 | int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); | |
958 | struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, | |
959 | unsigned long offset); | |
960 | #if 0 /* for kernel-doc */ | |
961 | /** | |
962 | * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer | |
963 | * @substream: the substream to allocate the buffer to | |
964 | * @size: the requested buffer size, in bytes | |
965 | * | |
966 | * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is | |
967 | * contiguous in kernel virtual space, but not in physical memory. Use this | |
968 | * if the buffer is accessed by kernel code but not by device DMA. | |
969 | * | |
eb7c06e8 | 970 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error |
681b84e1 CL |
971 | * code. |
972 | */ | |
973 | static int snd_pcm_lib_alloc_vmalloc_buffer | |
974 | (struct snd_pcm_substream *substream, size_t size); | |
975 | /** | |
976 | * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer | |
977 | * @substream: the substream to allocate the buffer to | |
978 | * @size: the requested buffer size, in bytes | |
979 | * | |
980 | * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses | |
981 | * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. | |
eb7c06e8 YB |
982 | * |
983 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error | |
984 | * code. | |
681b84e1 CL |
985 | */ |
986 | static int snd_pcm_lib_alloc_vmalloc_32_buffer | |
987 | (struct snd_pcm_substream *substream, size_t size); | |
988 | #endif | |
989 | #define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \ | |
990 | _snd_pcm_lib_alloc_vmalloc_buffer \ | |
991 | (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO) | |
992 | #define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \ | |
993 | _snd_pcm_lib_alloc_vmalloc_buffer \ | |
994 | (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO) | |
995 | ||
9d069dc0 TI |
996 | #define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p) |
997 | ||
cc6a8acd | 998 | #ifdef CONFIG_SND_DMA_SGBUF |
77a23f26 TI |
999 | /* |
1000 | * SG-buffer handling | |
1001 | */ | |
1002 | #define snd_pcm_substream_sgbuf(substream) \ | |
9d069dc0 | 1003 | snd_pcm_get_dma_buf(substream)->private_data |
77a23f26 TI |
1004 | |
1005 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, | |
1006 | unsigned long offset); | |
cc6a8acd TI |
1007 | #else /* !SND_DMA_SGBUF */ |
1008 | /* | |
1009 | * fake using a continuous buffer | |
1010 | */ | |
9d069dc0 TI |
1011 | #define snd_pcm_sgbuf_ops_page NULL |
1012 | #endif /* SND_DMA_SGBUF */ | |
1013 | ||
cc6a8acd TI |
1014 | static inline dma_addr_t |
1015 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) | |
1016 | { | |
9d069dc0 | 1017 | return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs); |
cc6a8acd TI |
1018 | } |
1019 | ||
1020 | static inline void * | |
1021 | snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) | |
1022 | { | |
9d069dc0 | 1023 | return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs); |
cc6a8acd TI |
1024 | } |
1025 | ||
9d069dc0 TI |
1026 | static inline unsigned int |
1027 | snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, | |
1028 | unsigned int ofs, unsigned int size) | |
1029 | { | |
1030 | return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size); | |
1031 | } | |
cc6a8acd | 1032 | |
1da177e4 LT |
1033 | /* handle mmap counter - PCM mmap callback should handle this counter properly */ |
1034 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) | |
1035 | { | |
877211f5 | 1036 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 1037 | atomic_inc(&substream->mmap_count); |
1da177e4 LT |
1038 | } |
1039 | ||
1040 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) | |
1041 | { | |
877211f5 | 1042 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 1043 | atomic_dec(&substream->mmap_count); |
1da177e4 LT |
1044 | } |
1045 | ||
18a2b962 TI |
1046 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
1047 | struct vm_area_struct *area); | |
1da177e4 LT |
1048 | /* mmap for io-memory area */ |
1049 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
1050 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP | |
877211f5 | 1051 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
1da177e4 LT |
1052 | #else |
1053 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 | |
1054 | #define snd_pcm_lib_mmap_iomem NULL | |
1055 | #endif | |
1056 | ||
3674f19d | 1057 | #define snd_pcm_lib_mmap_vmalloc NULL |
c32d977b | 1058 | |
1da177e4 LT |
1059 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) |
1060 | { | |
1061 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; | |
1062 | } | |
1063 | ||
1064 | /* | |
1065 | * Misc | |
1066 | */ | |
1067 | ||
1068 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ | |
1069 | (IEC958_AES1_CON_ORIGINAL<<8)|\ | |
1070 | (IEC958_AES1_CON_PCM_CODER<<8)|\ | |
1071 | (IEC958_AES3_CON_FS_48000<<24)) | |
1072 | ||
7eaa943c TI |
1073 | #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) |
1074 | ||
6e5265ec TI |
1075 | const char *snd_pcm_format_name(snd_pcm_format_t format); |
1076 | ||
1aad779f | 1077 | /** |
8513915a RD |
1078 | * snd_pcm_stream_str - Get a string naming the direction of a stream |
1079 | * @substream: the pcm substream instance | |
eb7c06e8 YB |
1080 | * |
1081 | * Return: A string naming the direction of the stream. | |
1aad779f OL |
1082 | */ |
1083 | static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream) | |
1084 | { | |
1085 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
1086 | return "Playback"; | |
1087 | else | |
1088 | return "Capture"; | |
1089 | } | |
1090 | ||
2d3391ec TI |
1091 | /* |
1092 | * PCM channel-mapping control API | |
1093 | */ | |
1094 | /* array element of channel maps */ | |
1095 | struct snd_pcm_chmap_elem { | |
1096 | unsigned char channels; | |
1097 | unsigned char map[15]; | |
1098 | }; | |
1099 | ||
1100 | /* channel map information; retrieved via snd_kcontrol_chip() */ | |
1101 | struct snd_pcm_chmap { | |
1102 | struct snd_pcm *pcm; /* assigned PCM instance */ | |
1103 | int stream; /* PLAYBACK or CAPTURE */ | |
1104 | struct snd_kcontrol *kctl; | |
1105 | const struct snd_pcm_chmap_elem *chmap; | |
1106 | unsigned int max_channels; | |
1107 | unsigned int channel_mask; /* optional: active channels bitmask */ | |
1108 | void *private_data; /* optional: private data pointer */ | |
1109 | }; | |
1110 | ||
1111 | /* get the PCM substream assigned to the given chmap info */ | |
1112 | static inline struct snd_pcm_substream * | |
1113 | snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) | |
1114 | { | |
1115 | struct snd_pcm_substream *s; | |
1116 | for (s = info->pcm->streams[info->stream].substream; s; s = s->next) | |
1117 | if (s->number == idx) | |
1118 | return s; | |
1119 | return NULL; | |
1120 | } | |
1121 | ||
1122 | /* ALSA-standard channel maps (RL/RR prior to C/LFE) */ | |
1123 | extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[]; | |
1124 | /* Other world's standard channel maps (C/LFE prior to RL/RR) */ | |
1125 | extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[]; | |
1126 | ||
1127 | /* bit masks to be passed to snd_pcm_chmap.channel_mask field */ | |
1128 | #define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4)) | |
1129 | #define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6)) | |
1130 | #define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8)) | |
1131 | ||
1132 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
1133 | const struct snd_pcm_chmap_elem *chmap, | |
1134 | int max_channels, | |
1135 | unsigned long private_value, | |
1136 | struct snd_pcm_chmap **info_ret); | |
1137 | ||
74c34ca1 EZ |
1138 | /* Strong-typed conversion of pcm_format to bitwise */ |
1139 | static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) | |
1140 | { | |
1141 | return 1ULL << (__force int) pcm_format; | |
1142 | } | |
1143 | ||
1da177e4 | 1144 | #endif /* __SOUND_PCM_H */ |