Commit | Line | Data |
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1a59d1b8 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | #ifndef __SOUND_PCM_H |
3 | #define __SOUND_PCM_H | |
4 | ||
5 | /* | |
6 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 7 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 | 8 | * Abramo Bagnara <abramo@alsa-project.org> |
1da177e4 LT |
9 | */ |
10 | ||
11 | #include <sound/asound.h> | |
12 | #include <sound/memalloc.h> | |
f90c06a2 | 13 | #include <sound/minors.h> |
1da177e4 | 14 | #include <linux/poll.h> |
f23f6e08 | 15 | #include <linux/mm.h> |
1da177e4 | 16 | #include <linux/bitops.h> |
e8db0be1 | 17 | #include <linux/pm_qos.h> |
f57f3df0 | 18 | #include <linux/refcount.h> |
1da177e4 | 19 | |
1da177e4 LT |
20 | #define snd_pcm_substream_chip(substream) ((substream)->private_data) |
21 | #define snd_pcm_chip(pcm) ((pcm)->private_data) | |
22 | ||
6d2412b8 | 23 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
a1ce3928 | 24 | #include <sound/pcm_oss.h> |
1da177e4 LT |
25 | #endif |
26 | ||
27 | /* | |
28 | * Hardware (lowlevel) section | |
29 | */ | |
30 | ||
877211f5 | 31 | struct snd_pcm_hardware { |
1da177e4 LT |
32 | unsigned int info; /* SNDRV_PCM_INFO_* */ |
33 | u64 formats; /* SNDRV_PCM_FMTBIT_* */ | |
34 | unsigned int rates; /* SNDRV_PCM_RATE_* */ | |
35 | unsigned int rate_min; /* min rate */ | |
36 | unsigned int rate_max; /* max rate */ | |
37 | unsigned int channels_min; /* min channels */ | |
38 | unsigned int channels_max; /* max channels */ | |
39 | size_t buffer_bytes_max; /* max buffer size */ | |
40 | size_t period_bytes_min; /* min period size */ | |
41 | size_t period_bytes_max; /* max period size */ | |
42 | unsigned int periods_min; /* min # of periods */ | |
43 | unsigned int periods_max; /* max # of periods */ | |
44 | size_t fifo_size; /* fifo size in bytes */ | |
877211f5 | 45 | }; |
1da177e4 | 46 | |
3ddee7f8 | 47 | struct snd_pcm_status64; |
e0e6ce03 RD |
48 | struct snd_pcm_substream; |
49 | ||
229d0430 PLB |
50 | struct snd_pcm_audio_tstamp_config; /* definitions further down */ |
51 | struct snd_pcm_audio_tstamp_report; | |
52 | ||
877211f5 TI |
53 | struct snd_pcm_ops { |
54 | int (*open)(struct snd_pcm_substream *substream); | |
55 | int (*close)(struct snd_pcm_substream *substream); | |
56 | int (*ioctl)(struct snd_pcm_substream * substream, | |
1da177e4 | 57 | unsigned int cmd, void *arg); |
877211f5 TI |
58 | int (*hw_params)(struct snd_pcm_substream *substream, |
59 | struct snd_pcm_hw_params *params); | |
60 | int (*hw_free)(struct snd_pcm_substream *substream); | |
61 | int (*prepare)(struct snd_pcm_substream *substream); | |
62 | int (*trigger)(struct snd_pcm_substream *substream, int cmd); | |
1e850bee | 63 | int (*sync_stop)(struct snd_pcm_substream *substream); |
877211f5 | 64 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); |
3179f620 | 65 | int (*get_time_info)(struct snd_pcm_substream *substream, |
fcae40c9 | 66 | struct timespec64 *system_ts, struct timespec64 *audio_ts, |
3179f620 PLB |
67 | struct snd_pcm_audio_tstamp_config *audio_tstamp_config, |
68 | struct snd_pcm_audio_tstamp_report *audio_tstamp_report); | |
29d1a873 TI |
69 | int (*fill_silence)(struct snd_pcm_substream *substream, int channel, |
70 | unsigned long pos, unsigned long bytes); | |
71 | int (*copy_user)(struct snd_pcm_substream *substream, int channel, | |
72 | unsigned long pos, void __user *buf, | |
73 | unsigned long bytes); | |
74 | int (*copy_kernel)(struct snd_pcm_substream *substream, int channel, | |
75 | unsigned long pos, void *buf, unsigned long bytes); | |
877211f5 TI |
76 | struct page *(*page)(struct snd_pcm_substream *substream, |
77 | unsigned long offset); | |
78 | int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); | |
79 | int (*ack)(struct snd_pcm_substream *substream); | |
80 | }; | |
1da177e4 LT |
81 | |
82 | /* | |
83 | * | |
84 | */ | |
85 | ||
f90c06a2 PM |
86 | #if defined(CONFIG_SND_DYNAMIC_MINORS) |
87 | #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2) | |
88 | #else | |
89 | #define SNDRV_PCM_DEVICES 8 | |
90 | #endif | |
896e6cc2 | 91 | |
1da177e4 | 92 | #define SNDRV_PCM_IOCTL1_RESET 0 |
e11f0f90 | 93 | /* 1 is absent slot. */ |
1da177e4 | 94 | #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 |
ba61faf0 | 95 | /* 3 is absent slot. */ |
8bea869c | 96 | #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 |
1da177e4 LT |
97 | |
98 | #define SNDRV_PCM_TRIGGER_STOP 0 | |
99 | #define SNDRV_PCM_TRIGGER_START 1 | |
100 | #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 | |
101 | #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 | |
102 | #define SNDRV_PCM_TRIGGER_SUSPEND 5 | |
103 | #define SNDRV_PCM_TRIGGER_RESUME 6 | |
48d88297 | 104 | #define SNDRV_PCM_TRIGGER_DRAIN 7 |
1da177e4 LT |
105 | |
106 | #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) | |
107 | ||
108 | /* If you change this don't forget to change rates[] table in pcm_native.c */ | |
b5172e62 BZ |
109 | #define SNDRV_PCM_RATE_5512 (1U<<0) /* 5512Hz */ |
110 | #define SNDRV_PCM_RATE_8000 (1U<<1) /* 8000Hz */ | |
111 | #define SNDRV_PCM_RATE_11025 (1U<<2) /* 11025Hz */ | |
112 | #define SNDRV_PCM_RATE_16000 (1U<<3) /* 16000Hz */ | |
113 | #define SNDRV_PCM_RATE_22050 (1U<<4) /* 22050Hz */ | |
114 | #define SNDRV_PCM_RATE_32000 (1U<<5) /* 32000Hz */ | |
115 | #define SNDRV_PCM_RATE_44100 (1U<<6) /* 44100Hz */ | |
116 | #define SNDRV_PCM_RATE_48000 (1U<<7) /* 48000Hz */ | |
117 | #define SNDRV_PCM_RATE_64000 (1U<<8) /* 64000Hz */ | |
118 | #define SNDRV_PCM_RATE_88200 (1U<<9) /* 88200Hz */ | |
119 | #define SNDRV_PCM_RATE_96000 (1U<<10) /* 96000Hz */ | |
120 | #define SNDRV_PCM_RATE_176400 (1U<<11) /* 176400Hz */ | |
121 | #define SNDRV_PCM_RATE_192000 (1U<<12) /* 192000Hz */ | |
122 | #define SNDRV_PCM_RATE_352800 (1U<<13) /* 352800Hz */ | |
123 | #define SNDRV_PCM_RATE_384000 (1U<<14) /* 384000Hz */ | |
124 | ||
125 | #define SNDRV_PCM_RATE_CONTINUOUS (1U<<30) /* continuous range */ | |
126 | #define SNDRV_PCM_RATE_KNOT (1U<<31) /* supports more non-continuos rates */ | |
1da177e4 LT |
127 | |
128 | #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ | |
129 | SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ | |
130 | SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) | |
131 | #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) | |
132 | #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ | |
133 | SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) | |
134 | #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ | |
135 | SNDRV_PCM_RATE_192000) | |
4cc4531c VA |
136 | #define SNDRV_PCM_RATE_8000_384000 (SNDRV_PCM_RATE_8000_192000|\ |
137 | SNDRV_PCM_RATE_352800|\ | |
138 | SNDRV_PCM_RATE_384000) | |
fea952e5 CL |
139 | #define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt) |
140 | #define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8) | |
141 | #define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8) | |
142 | #define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE) | |
143 | #define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE) | |
144 | #define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE) | |
145 | #define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE) | |
146 | #define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE) | |
147 | #define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE) | |
148 | #define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE) | |
149 | #define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE) | |
fb6723da TS |
150 | // For S32/U32 formats, 'msbits' hardware parameter is often used to deliver information about the |
151 | // available bit count in most significant bit. It's for the case of so-called 'left-justified' or | |
152 | // `right-padding` sample which has less width than 32 bit. | |
fea952e5 CL |
153 | #define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE) |
154 | #define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE) | |
155 | #define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE) | |
156 | #define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE) | |
157 | #define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE) | |
158 | #define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE) | |
159 | #define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE) | |
160 | #define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE) | |
161 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE) | |
162 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE) | |
163 | #define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW) | |
164 | #define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW) | |
165 | #define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM) | |
166 | #define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG) | |
167 | #define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM) | |
823dbb6e MS |
168 | #define SNDRV_PCM_FMTBIT_S20_LE _SNDRV_PCM_FMTBIT(S20_LE) |
169 | #define SNDRV_PCM_FMTBIT_U20_LE _SNDRV_PCM_FMTBIT(U20_LE) | |
170 | #define SNDRV_PCM_FMTBIT_S20_BE _SNDRV_PCM_FMTBIT(S20_BE) | |
171 | #define SNDRV_PCM_FMTBIT_U20_BE _SNDRV_PCM_FMTBIT(U20_BE) | |
fea952e5 CL |
172 | #define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL) |
173 | #define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE) | |
174 | #define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE) | |
175 | #define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE) | |
176 | #define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE) | |
177 | #define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE) | |
178 | #define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE) | |
179 | #define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE) | |
180 | #define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE) | |
181 | #define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE) | |
182 | #define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE) | |
183 | #define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE) | |
184 | #define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE) | |
185 | #define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24) | |
186 | #define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B) | |
187 | #define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40) | |
188 | #define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B) | |
ef7a4f97 DM |
189 | #define SNDRV_PCM_FMTBIT_DSD_U8 _SNDRV_PCM_FMTBIT(DSD_U8) |
190 | #define SNDRV_PCM_FMTBIT_DSD_U16_LE _SNDRV_PCM_FMTBIT(DSD_U16_LE) | |
d4288d3f | 191 | #define SNDRV_PCM_FMTBIT_DSD_U32_LE _SNDRV_PCM_FMTBIT(DSD_U32_LE) |
d42472ec JL |
192 | #define SNDRV_PCM_FMTBIT_DSD_U16_BE _SNDRV_PCM_FMTBIT(DSD_U16_BE) |
193 | #define SNDRV_PCM_FMTBIT_DSD_U32_BE _SNDRV_PCM_FMTBIT(DSD_U32_BE) | |
1da177e4 LT |
194 | |
195 | #ifdef SNDRV_LITTLE_ENDIAN | |
196 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE | |
197 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE | |
198 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE | |
199 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE | |
200 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE | |
201 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE | |
202 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE | |
203 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE | |
204 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | |
823dbb6e MS |
205 | #define SNDRV_PCM_FMTBIT_S20 SNDRV_PCM_FMTBIT_S20_LE |
206 | #define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_LE | |
1da177e4 LT |
207 | #endif |
208 | #ifdef SNDRV_BIG_ENDIAN | |
209 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE | |
210 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE | |
211 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE | |
212 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE | |
213 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE | |
214 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE | |
215 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE | |
216 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE | |
217 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE | |
823dbb6e MS |
218 | #define SNDRV_PCM_FMTBIT_S20 SNDRV_PCM_FMTBIT_S20_BE |
219 | #define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_BE | |
1da177e4 LT |
220 | #endif |
221 | ||
877211f5 TI |
222 | struct snd_pcm_file { |
223 | struct snd_pcm_substream *substream; | |
548a648b | 224 | int no_compat_mmap; |
4b671f57 | 225 | unsigned int user_pversion; /* supported protocol version */ |
1da177e4 LT |
226 | }; |
227 | ||
877211f5 TI |
228 | struct snd_pcm_hw_rule; |
229 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, | |
230 | struct snd_pcm_hw_rule *rule); | |
1da177e4 | 231 | |
877211f5 | 232 | struct snd_pcm_hw_rule { |
1da177e4 | 233 | unsigned int cond; |
1da177e4 | 234 | int var; |
23b53d44 | 235 | int deps[5]; |
d16efa06 LPC |
236 | |
237 | snd_pcm_hw_rule_func_t func; | |
1da177e4 LT |
238 | void *private; |
239 | }; | |
240 | ||
877211f5 TI |
241 | struct snd_pcm_hw_constraints { |
242 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - | |
1da177e4 | 243 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
877211f5 | 244 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
1da177e4 LT |
245 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
246 | unsigned int rules_num; | |
247 | unsigned int rules_all; | |
877211f5 TI |
248 | struct snd_pcm_hw_rule *rules; |
249 | }; | |
1da177e4 | 250 | |
877211f5 TI |
251 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
252 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
253 | { |
254 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
255 | } | |
256 | ||
877211f5 TI |
257 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
258 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
259 | { |
260 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
261 | } | |
262 | ||
877211f5 | 263 | struct snd_ratnum { |
1da177e4 LT |
264 | unsigned int num; |
265 | unsigned int den_min, den_max, den_step; | |
877211f5 | 266 | }; |
1da177e4 | 267 | |
877211f5 | 268 | struct snd_ratden { |
1da177e4 LT |
269 | unsigned int num_min, num_max, num_step; |
270 | unsigned int den; | |
877211f5 | 271 | }; |
1da177e4 | 272 | |
877211f5 | 273 | struct snd_pcm_hw_constraint_ratnums { |
1da177e4 | 274 | int nrats; |
e5e113cf | 275 | const struct snd_ratnum *rats; |
877211f5 | 276 | }; |
1da177e4 | 277 | |
877211f5 | 278 | struct snd_pcm_hw_constraint_ratdens { |
1da177e4 | 279 | int nrats; |
e5e113cf | 280 | const struct snd_ratden *rats; |
877211f5 | 281 | }; |
1da177e4 | 282 | |
877211f5 | 283 | struct snd_pcm_hw_constraint_list { |
4af87a93 | 284 | const unsigned int *list; |
782e50e0 | 285 | unsigned int count; |
1da177e4 | 286 | unsigned int mask; |
877211f5 | 287 | }; |
1da177e4 | 288 | |
f66f898e PR |
289 | struct snd_pcm_hw_constraint_ranges { |
290 | unsigned int count; | |
291 | const struct snd_interval *ranges; | |
292 | unsigned int mask; | |
293 | }; | |
294 | ||
229d0430 PLB |
295 | /* |
296 | * userspace-provided audio timestamp config to kernel, | |
297 | * structure is for internal use only and filled with dedicated unpack routine | |
298 | */ | |
299 | struct snd_pcm_audio_tstamp_config { | |
300 | /* 5 of max 16 bits used */ | |
301 | u32 type_requested:4; | |
302 | u32 report_delay:1; /* add total delay to A/D or D/A */ | |
303 | }; | |
304 | ||
305 | static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data, | |
306 | struct snd_pcm_audio_tstamp_config *config) | |
307 | { | |
308 | config->type_requested = data & 0xF; | |
309 | config->report_delay = (data >> 4) & 1; | |
310 | } | |
311 | ||
312 | /* | |
313 | * kernel-provided audio timestamp report to user-space | |
314 | * structure is for internal use only and read by dedicated pack routine | |
315 | */ | |
316 | struct snd_pcm_audio_tstamp_report { | |
317 | /* 6 of max 16 bits used for bit-fields */ | |
318 | ||
319 | /* for backwards compatibility */ | |
320 | u32 valid:1; | |
321 | ||
322 | /* actual type if hardware could not support requested timestamp */ | |
323 | u32 actual_type:4; | |
324 | ||
325 | /* accuracy represented in ns units */ | |
326 | u32 accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */ | |
327 | u32 accuracy; /* up to 4.29s, will be packed in separate field */ | |
328 | }; | |
329 | ||
330 | static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy, | |
331 | const struct snd_pcm_audio_tstamp_report *report) | |
332 | { | |
333 | u32 tmp; | |
334 | ||
335 | tmp = report->accuracy_report; | |
336 | tmp <<= 4; | |
337 | tmp |= report->actual_type; | |
338 | tmp <<= 1; | |
339 | tmp |= report->valid; | |
340 | ||
341 | *data &= 0xffff; /* zero-clear MSBs */ | |
342 | *data |= (tmp << 16); | |
343 | *accuracy = report->accuracy; | |
344 | } | |
345 | ||
346 | ||
877211f5 | 347 | struct snd_pcm_runtime { |
1da177e4 | 348 | /* -- Status -- */ |
f0061c18 TI |
349 | snd_pcm_state_t state; /* stream state */ |
350 | snd_pcm_state_t suspended_state; /* suspended stream state */ | |
877211f5 | 351 | struct snd_pcm_substream *trigger_master; |
fcae40c9 | 352 | struct timespec64 trigger_tstamp; /* trigger timestamp */ |
2b79d7a6 | 353 | bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */ |
1da177e4 LT |
354 | int overrange; |
355 | snd_pcm_uframes_t avail_max; | |
356 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ | |
e7636925 | 357 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ |
bbf6ad13 | 358 | unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ |
bd76af0f | 359 | unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ |
4bbe1ddf | 360 | snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ |
0e8014d7 | 361 | u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */ |
1da177e4 LT |
362 | |
363 | /* -- HW params -- */ | |
364 | snd_pcm_access_t access; /* access mode */ | |
365 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ | |
366 | snd_pcm_subformat_t subformat; /* subformat */ | |
367 | unsigned int rate; /* rate in Hz */ | |
368 | unsigned int channels; /* channels */ | |
369 | snd_pcm_uframes_t period_size; /* period size */ | |
370 | unsigned int periods; /* periods */ | |
371 | snd_pcm_uframes_t buffer_size; /* buffer size */ | |
1da177e4 LT |
372 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ |
373 | size_t byte_align; | |
374 | unsigned int frame_bits; | |
375 | unsigned int sample_bits; | |
376 | unsigned int info; | |
377 | unsigned int rate_num; | |
378 | unsigned int rate_den; | |
ab69a490 | 379 | unsigned int no_period_wakeup: 1; |
1da177e4 | 380 | |
9f656705 OB |
381 | /* -- SW params; see struct snd_pcm_sw_params for comments -- */ |
382 | int tstamp_mode; | |
1da177e4 | 383 | unsigned int period_step; |
1da177e4 LT |
384 | snd_pcm_uframes_t start_threshold; |
385 | snd_pcm_uframes_t stop_threshold; | |
9f656705 OB |
386 | snd_pcm_uframes_t silence_threshold; |
387 | snd_pcm_uframes_t silence_size; | |
388 | snd_pcm_uframes_t boundary; | |
1da177e4 | 389 | |
9f656705 | 390 | /* internal data of auto-silencer */ |
1da177e4 | 391 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ |
9f656705 | 392 | snd_pcm_uframes_t silence_filled; /* already filled part of silence area */ |
1da177e4 | 393 | |
877211f5 | 394 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ |
1da177e4 LT |
395 | |
396 | /* -- mmap -- */ | |
503fc85a TI |
397 | struct snd_pcm_mmap_status *status; |
398 | struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
399 | |
400 | /* -- locking / scheduling -- */ | |
5daeba34 | 401 | snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ |
c91a988d JK |
402 | wait_queue_head_t sleep; /* poll sleep */ |
403 | wait_queue_head_t tsleep; /* transfer sleep */ | |
96b09709 | 404 | struct snd_fasync *fasync; |
1e850bee | 405 | bool stop_operating; /* sync_stop will be called */ |
92ee3c60 | 406 | struct mutex buffer_mutex; /* protect for buffer changes */ |
bc55cfd5 | 407 | atomic_t buffer_accessing; /* >0: in r/w operation, <0: blocked */ |
1da177e4 LT |
408 | |
409 | /* -- private section -- */ | |
410 | void *private_data; | |
877211f5 | 411 | void (*private_free)(struct snd_pcm_runtime *runtime); |
1da177e4 LT |
412 | |
413 | /* -- hardware description -- */ | |
877211f5 TI |
414 | struct snd_pcm_hardware hw; |
415 | struct snd_pcm_hw_constraints hw_constraints; | |
1da177e4 | 416 | |
1da177e4 LT |
417 | /* -- timer -- */ |
418 | unsigned int timer_resolution; /* timer resolution */ | |
b751eef1 | 419 | int tstamp_type; /* timestamp type */ |
1da177e4 LT |
420 | |
421 | /* -- DMA -- */ | |
422 | unsigned char *dma_area; /* DMA area */ | |
423 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ | |
424 | size_t dma_bytes; /* size of DMA area */ | |
425 | ||
426 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ | |
0dba808e | 427 | unsigned int buffer_changed:1; /* buffer allocation changed; set only in managed mode */ |
1da177e4 | 428 | |
229d0430 PLB |
429 | /* -- audio timestamp config -- */ |
430 | struct snd_pcm_audio_tstamp_config audio_tstamp_config; | |
431 | struct snd_pcm_audio_tstamp_report audio_tstamp_report; | |
fcae40c9 | 432 | struct timespec64 driver_tstamp; |
229d0430 | 433 | |
6d2412b8 | 434 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 | 435 | /* -- OSS things -- */ |
877211f5 | 436 | struct snd_pcm_oss_runtime oss; |
1da177e4 LT |
437 | #endif |
438 | }; | |
439 | ||
877211f5 | 440 | struct snd_pcm_group { /* keep linked substreams */ |
1da177e4 | 441 | spinlock_t lock; |
257f8cce | 442 | struct mutex mutex; |
1da177e4 | 443 | struct list_head substreams; |
f57f3df0 | 444 | refcount_t refs; |
877211f5 | 445 | }; |
1da177e4 | 446 | |
e7373b70 CL |
447 | struct pid; |
448 | ||
877211f5 TI |
449 | struct snd_pcm_substream { |
450 | struct snd_pcm *pcm; | |
451 | struct snd_pcm_str *pstr; | |
1da177e4 LT |
452 | void *private_data; /* copied from pcm->private_data */ |
453 | int number; | |
454 | char name[32]; /* substream name */ | |
455 | int stream; /* stream (direction) */ | |
cc749986 | 456 | struct pm_qos_request latency_pm_qos_req; /* pm_qos request */ |
1da177e4 LT |
457 | size_t buffer_bytes_max; /* limit ring buffer size */ |
458 | struct snd_dma_buffer dma_buffer; | |
1da177e4 LT |
459 | size_t dma_max; |
460 | /* -- hardware operations -- */ | |
e6c2e7eb | 461 | const struct snd_pcm_ops *ops; |
1da177e4 | 462 | /* -- runtime information -- */ |
877211f5 | 463 | struct snd_pcm_runtime *runtime; |
1da177e4 | 464 | /* -- timer section -- */ |
877211f5 | 465 | struct snd_timer *timer; /* timer */ |
1da177e4 | 466 | unsigned timer_running: 1; /* time is running */ |
d64c5cf8 | 467 | long wait_time; /* time in ms for R/W to wait for avail */ |
1da177e4 | 468 | /* -- next substream -- */ |
877211f5 | 469 | struct snd_pcm_substream *next; |
1da177e4 LT |
470 | /* -- linked substreams -- */ |
471 | struct list_head link_list; /* linked list member */ | |
877211f5 TI |
472 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ |
473 | struct snd_pcm_group *group; /* pointer to current group */ | |
1da177e4 | 474 | /* -- assigned files -- */ |
0df63e44 | 475 | int ref_count; |
9c323fcb | 476 | atomic_t mmap_count; |
0df63e44 | 477 | unsigned int f_flags; |
3bf75f9b | 478 | void (*pcm_release)(struct snd_pcm_substream *); |
e7373b70 | 479 | struct pid *pid; |
6d2412b8 | 480 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 | 481 | /* -- OSS things -- */ |
877211f5 | 482 | struct snd_pcm_oss_substream oss; |
1da177e4 | 483 | #endif |
b7d90a35 | 484 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 | 485 | struct snd_info_entry *proc_root; |
2b30d411 | 486 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 | 487 | /* misc flags */ |
3bf75f9b | 488 | unsigned int hw_opened: 1; |
0dba808e | 489 | unsigned int managed_buffer_alloc:1; |
1da177e4 LT |
490 | }; |
491 | ||
0df63e44 | 492 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
1da177e4 LT |
493 | |
494 | ||
877211f5 | 495 | struct snd_pcm_str { |
1da177e4 | 496 | int stream; /* stream (direction) */ |
877211f5 | 497 | struct snd_pcm *pcm; |
1da177e4 LT |
498 | /* -- substreams -- */ |
499 | unsigned int substream_count; | |
500 | unsigned int substream_opened; | |
877211f5 | 501 | struct snd_pcm_substream *substream; |
6d2412b8 | 502 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 | 503 | /* -- OSS things -- */ |
877211f5 | 504 | struct snd_pcm_oss_stream oss; |
1da177e4 | 505 | #endif |
b7d90a35 | 506 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 | 507 | struct snd_info_entry *proc_root; |
b7d90a35 | 508 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
1da177e4 | 509 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ |
1da177e4 | 510 | #endif |
b7d90a35 | 511 | #endif |
2d3391ec | 512 | struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */ |
ef46c7af | 513 | struct device dev; |
1da177e4 LT |
514 | }; |
515 | ||
877211f5 TI |
516 | struct snd_pcm { |
517 | struct snd_card *card; | |
f87135f5 | 518 | struct list_head list; |
f90c06a2 | 519 | int device; /* device number */ |
1da177e4 LT |
520 | unsigned int info_flags; |
521 | unsigned short dev_class; | |
522 | unsigned short dev_subclass; | |
523 | char id[64]; | |
524 | char name[80]; | |
877211f5 | 525 | struct snd_pcm_str streams[2]; |
1a60d4c5 | 526 | struct mutex open_mutex; |
1da177e4 LT |
527 | wait_queue_head_t open_wait; |
528 | void *private_data; | |
877211f5 | 529 | void (*private_free) (struct snd_pcm *pcm); |
945e5038 | 530 | bool internal; /* pcm is for internal use only */ |
257f8cce | 531 | bool nonatomic; /* whole PCM operations are in non-atomic context */ |
3d21ef0b | 532 | bool no_device_suspend; /* don't invoke device PM suspend */ |
6d2412b8 | 533 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
877211f5 | 534 | struct snd_pcm_oss oss; |
1da177e4 LT |
535 | #endif |
536 | }; | |
537 | ||
1da177e4 LT |
538 | /* |
539 | * Registering | |
540 | */ | |
541 | ||
54047320 | 542 | extern const struct file_operations snd_pcm_f_ops[2]; |
1da177e4 | 543 | |
e6161653 | 544 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
1da177e4 | 545 | int playback_count, int capture_count, |
877211f5 | 546 | struct snd_pcm **rpcm); |
945e5038 LG |
547 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, |
548 | int playback_count, int capture_count, | |
549 | struct snd_pcm **rpcm); | |
877211f5 | 550 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); |
1da177e4 | 551 | |
58f30d65 TI |
552 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
553 | struct snd_pcm_notify { | |
554 | int (*n_register) (struct snd_pcm * pcm); | |
555 | int (*n_disconnect) (struct snd_pcm * pcm); | |
556 | int (*n_unregister) (struct snd_pcm * pcm); | |
557 | struct list_head list; | |
558 | }; | |
877211f5 | 559 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
58f30d65 | 560 | #endif |
1da177e4 LT |
561 | |
562 | /* | |
563 | * Native I/O | |
564 | */ | |
565 | ||
877211f5 TI |
566 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
567 | int snd_pcm_info_user(struct snd_pcm_substream *substream, | |
568 | struct snd_pcm_info __user *info); | |
3ddee7f8 BW |
569 | int snd_pcm_status64(struct snd_pcm_substream *substream, |
570 | struct snd_pcm_status64 *status); | |
877211f5 | 571 | int snd_pcm_start(struct snd_pcm_substream *substream); |
fea952e5 | 572 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status); |
877211f5 | 573 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); |
1fb8510c | 574 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream); |
1da177e4 | 575 | #ifdef CONFIG_PM |
877211f5 | 576 | int snd_pcm_suspend_all(struct snd_pcm *pcm); |
1cf05ba2 | 577 | #else |
1cf05ba2 TI |
578 | static inline int snd_pcm_suspend_all(struct snd_pcm *pcm) |
579 | { | |
580 | return 0; | |
581 | } | |
1da177e4 | 582 | #endif |
877211f5 | 583 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); |
3bf75f9b TI |
584 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, |
585 | struct snd_pcm_substream **rsubstream); | |
877211f5 | 586 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); |
3bf75f9b TI |
587 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, |
588 | struct snd_pcm_substream **rsubstream); | |
589 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); | |
877211f5 | 590 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); |
1da177e4 | 591 | |
acb03d44 EB |
592 | |
593 | #ifdef CONFIG_SND_DEBUG | |
594 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
595 | char *name, size_t len); | |
596 | #else | |
597 | static inline void | |
598 | snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size) | |
599 | { | |
600 | *buf = 0; | |
601 | } | |
602 | #endif | |
603 | ||
1da177e4 LT |
604 | /* |
605 | * PCM library | |
606 | */ | |
607 | ||
30b771cf TI |
608 | /** |
609 | * snd_pcm_stream_linked - Check whether the substream is linked with others | |
610 | * @substream: substream to check | |
611 | * | |
4e2b7067 | 612 | * Return: true if the given substream is being linked with others |
30b771cf | 613 | */ |
877211f5 | 614 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) |
1da177e4 LT |
615 | { |
616 | return substream->group != &substream->self_group; | |
617 | } | |
618 | ||
7af142f7 TI |
619 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream); |
620 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream); | |
621 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream); | |
622 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream); | |
623 | unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream); | |
3c75c0ea | 624 | unsigned long _snd_pcm_stream_lock_irqsave_nested(struct snd_pcm_substream *substream); |
30b771cf TI |
625 | |
626 | /** | |
627 | * snd_pcm_stream_lock_irqsave - Lock the PCM stream | |
628 | * @substream: PCM substream | |
629 | * @flags: irq flags | |
630 | * | |
631 | * This locks the PCM stream like snd_pcm_stream_lock() but with the local | |
632 | * IRQ (only when nonatomic is false). In nonatomic case, this is identical | |
633 | * as snd_pcm_stream_lock(). | |
634 | */ | |
7af142f7 TI |
635 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ |
636 | do { \ | |
637 | typecheck(unsigned long, flags); \ | |
638 | flags = _snd_pcm_stream_lock_irqsave(substream); \ | |
639 | } while (0) | |
640 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, | |
641 | unsigned long flags); | |
1da177e4 | 642 | |
3c75c0ea TI |
643 | /** |
644 | * snd_pcm_stream_lock_irqsave_nested - Single-nested PCM stream locking | |
645 | * @substream: PCM substream | |
646 | * @flags: irq flags | |
647 | * | |
648 | * This locks the PCM stream like snd_pcm_stream_lock_irqsave() but with | |
649 | * the single-depth lockdep subclass. | |
650 | */ | |
651 | #define snd_pcm_stream_lock_irqsave_nested(substream, flags) \ | |
652 | do { \ | |
653 | typecheck(unsigned long, flags); \ | |
654 | flags = _snd_pcm_stream_lock_irqsave_nested(substream); \ | |
655 | } while (0) | |
656 | ||
30b771cf TI |
657 | /** |
658 | * snd_pcm_group_for_each_entry - iterate over the linked substreams | |
659 | * @s: the iterator | |
660 | * @substream: the substream | |
661 | * | |
662 | * Iterate over the all linked substreams to the given @substream. | |
663 | * When @substream isn't linked with any others, this gives returns @substream | |
664 | * itself once. | |
665 | */ | |
ef991b95 TI |
666 | #define snd_pcm_group_for_each_entry(s, substream) \ |
667 | list_for_each_entry(s, &substream->group->substreams, link_list) | |
1da177e4 | 668 | |
3193abd2 KM |
669 | #define for_each_pcm_streams(stream) \ |
670 | for (stream = SNDRV_PCM_STREAM_PLAYBACK; \ | |
671 | stream <= SNDRV_PCM_STREAM_LAST; \ | |
672 | stream++) | |
673 | ||
30b771cf TI |
674 | /** |
675 | * snd_pcm_running - Check whether the substream is in a running state | |
676 | * @substream: substream to check | |
677 | * | |
4e2b7067 | 678 | * Return: true if the given substream is in the state RUNNING, or in the |
30b771cf TI |
679 | * state DRAINING for playback. |
680 | */ | |
877211f5 | 681 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
1da177e4 | 682 | { |
f0061c18 TI |
683 | return (substream->runtime->state == SNDRV_PCM_STATE_RUNNING || |
684 | (substream->runtime->state == SNDRV_PCM_STATE_DRAINING && | |
1da177e4 LT |
685 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); |
686 | } | |
687 | ||
f0061c18 TI |
688 | /** |
689 | * __snd_pcm_set_state - Change the current PCM state | |
690 | * @runtime: PCM runtime to set | |
691 | * @state: the current state to set | |
692 | * | |
693 | * Call within the stream lock | |
694 | */ | |
695 | static inline void __snd_pcm_set_state(struct snd_pcm_runtime *runtime, | |
696 | snd_pcm_state_t state) | |
697 | { | |
698 | runtime->state = state; | |
699 | runtime->status->state = state; /* copy for mmap */ | |
700 | } | |
701 | ||
30b771cf TI |
702 | /** |
703 | * bytes_to_samples - Unit conversion of the size from bytes to samples | |
704 | * @runtime: PCM runtime instance | |
705 | * @size: size in bytes | |
4e2b7067 TI |
706 | * |
707 | * Return: the size in samples | |
30b771cf | 708 | */ |
877211f5 | 709 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
710 | { |
711 | return size * 8 / runtime->sample_bits; | |
712 | } | |
713 | ||
30b771cf TI |
714 | /** |
715 | * bytes_to_frames - Unit conversion of the size from bytes to frames | |
716 | * @runtime: PCM runtime instance | |
717 | * @size: size in bytes | |
4e2b7067 TI |
718 | * |
719 | * Return: the size in frames | |
30b771cf | 720 | */ |
877211f5 | 721 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
722 | { |
723 | return size * 8 / runtime->frame_bits; | |
724 | } | |
725 | ||
30b771cf TI |
726 | /** |
727 | * samples_to_bytes - Unit conversion of the size from samples to bytes | |
728 | * @runtime: PCM runtime instance | |
729 | * @size: size in samples | |
4e2b7067 TI |
730 | * |
731 | * Return: the byte size | |
30b771cf | 732 | */ |
877211f5 | 733 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
734 | { |
735 | return size * runtime->sample_bits / 8; | |
736 | } | |
737 | ||
30b771cf TI |
738 | /** |
739 | * frames_to_bytes - Unit conversion of the size from frames to bytes | |
740 | * @runtime: PCM runtime instance | |
741 | * @size: size in frames | |
4e2b7067 TI |
742 | * |
743 | * Return: the byte size | |
30b771cf | 744 | */ |
877211f5 | 745 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
1da177e4 LT |
746 | { |
747 | return size * runtime->frame_bits / 8; | |
748 | } | |
749 | ||
30b771cf TI |
750 | /** |
751 | * frame_aligned - Check whether the byte size is aligned to frames | |
752 | * @runtime: PCM runtime instance | |
753 | * @bytes: size in bytes | |
4e2b7067 TI |
754 | * |
755 | * Return: true if aligned, or false if not | |
30b771cf | 756 | */ |
877211f5 | 757 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
1da177e4 LT |
758 | { |
759 | return bytes % runtime->byte_align == 0; | |
760 | } | |
761 | ||
30b771cf TI |
762 | /** |
763 | * snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes | |
764 | * @substream: PCM substream | |
4e2b7067 TI |
765 | * |
766 | * Return: buffer byte size | |
30b771cf | 767 | */ |
877211f5 | 768 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 769 | { |
877211f5 | 770 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
771 | return frames_to_bytes(runtime, runtime->buffer_size); |
772 | } | |
773 | ||
30b771cf TI |
774 | /** |
775 | * snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes | |
776 | * @substream: PCM substream | |
4e2b7067 TI |
777 | * |
778 | * Return: period byte size | |
30b771cf | 779 | */ |
877211f5 | 780 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 781 | { |
877211f5 | 782 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
783 | return frames_to_bytes(runtime, runtime->period_size); |
784 | } | |
785 | ||
30b771cf TI |
786 | /** |
787 | * snd_pcm_playback_avail - Get the available (writable) space for playback | |
788 | * @runtime: PCM runtime instance | |
789 | * | |
790 | * Result is between 0 ... (boundary - 1) | |
4e2b7067 TI |
791 | * |
792 | * Return: available frame size | |
1da177e4 | 793 | */ |
877211f5 | 794 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
795 | { |
796 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; | |
797 | if (avail < 0) | |
798 | avail += runtime->boundary; | |
799 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) | |
800 | avail -= runtime->boundary; | |
801 | return avail; | |
802 | } | |
803 | ||
30b771cf | 804 | /** |
c24a1269 | 805 | * snd_pcm_capture_avail - Get the available (readable) space for capture |
30b771cf TI |
806 | * @runtime: PCM runtime instance |
807 | * | |
808 | * Result is between 0 ... (boundary - 1) | |
4e2b7067 TI |
809 | * |
810 | * Return: available frame size | |
1da177e4 | 811 | */ |
877211f5 | 812 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
813 | { |
814 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; | |
815 | if (avail < 0) | |
816 | avail += runtime->boundary; | |
817 | return avail; | |
818 | } | |
819 | ||
30b771cf TI |
820 | /** |
821 | * snd_pcm_playback_hw_avail - Get the queued space for playback | |
822 | * @runtime: PCM runtime instance | |
4e2b7067 TI |
823 | * |
824 | * Return: available frame size | |
30b771cf | 825 | */ |
877211f5 | 826 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
827 | { |
828 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); | |
829 | } | |
830 | ||
30b771cf TI |
831 | /** |
832 | * snd_pcm_capture_hw_avail - Get the free space for capture | |
833 | * @runtime: PCM runtime instance | |
4e2b7067 TI |
834 | * |
835 | * Return: available frame size | |
30b771cf | 836 | */ |
877211f5 | 837 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
838 | { |
839 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); | |
840 | } | |
841 | ||
842 | /** | |
843 | * snd_pcm_playback_ready - check whether the playback buffer is available | |
844 | * @substream: the pcm substream instance | |
845 | * | |
846 | * Checks whether enough free space is available on the playback buffer. | |
847 | * | |
eb7c06e8 | 848 | * Return: Non-zero if available, or zero if not. |
1da177e4 | 849 | */ |
877211f5 | 850 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
1da177e4 | 851 | { |
877211f5 | 852 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
853 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
854 | } | |
855 | ||
856 | /** | |
857 | * snd_pcm_capture_ready - check whether the capture buffer is available | |
858 | * @substream: the pcm substream instance | |
859 | * | |
860 | * Checks whether enough capture data is available on the capture buffer. | |
861 | * | |
eb7c06e8 | 862 | * Return: Non-zero if available, or zero if not. |
1da177e4 | 863 | */ |
877211f5 | 864 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
1da177e4 | 865 | { |
877211f5 | 866 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
867 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
868 | } | |
869 | ||
870 | /** | |
871 | * snd_pcm_playback_data - check whether any data exists on the playback buffer | |
872 | * @substream: the pcm substream instance | |
873 | * | |
eb7c06e8 | 874 | * Checks whether any data exists on the playback buffer. |
1da177e4 | 875 | * |
eb7c06e8 YB |
876 | * Return: Non-zero if any data exists, or zero if not. If stop_threshold |
877 | * is bigger or equal to boundary, then this function returns always non-zero. | |
1da177e4 | 878 | */ |
877211f5 | 879 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
1da177e4 | 880 | { |
877211f5 | 881 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
882 | |
883 | if (runtime->stop_threshold >= runtime->boundary) | |
884 | return 1; | |
885 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; | |
886 | } | |
887 | ||
888 | /** | |
889 | * snd_pcm_playback_empty - check whether the playback buffer is empty | |
890 | * @substream: the pcm substream instance | |
891 | * | |
892 | * Checks whether the playback buffer is empty. | |
893 | * | |
eb7c06e8 | 894 | * Return: Non-zero if empty, or zero if not. |
1da177e4 | 895 | */ |
877211f5 | 896 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
1da177e4 | 897 | { |
877211f5 | 898 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
899 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
900 | } | |
901 | ||
902 | /** | |
903 | * snd_pcm_capture_empty - check whether the capture buffer is empty | |
904 | * @substream: the pcm substream instance | |
905 | * | |
906 | * Checks whether the capture buffer is empty. | |
907 | * | |
eb7c06e8 | 908 | * Return: Non-zero if empty, or zero if not. |
1da177e4 | 909 | */ |
877211f5 | 910 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
1da177e4 | 911 | { |
877211f5 | 912 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
913 | return snd_pcm_capture_avail(runtime) == 0; |
914 | } | |
915 | ||
30b771cf TI |
916 | /** |
917 | * snd_pcm_trigger_done - Mark the master substream | |
918 | * @substream: the pcm substream instance | |
919 | * @master: the linked master substream | |
920 | * | |
921 | * When multiple substreams of the same card are linked and the hardware | |
922 | * supports the single-shot operation, the driver calls this in the loop | |
923 | * in snd_pcm_group_for_each_entry() for marking the substream as "done". | |
924 | * Then most of trigger operations are performed only to the given master | |
925 | * substream. | |
926 | * | |
927 | * The trigger_master mark is cleared at timestamp updates at the end | |
928 | * of trigger operations. | |
929 | */ | |
877211f5 TI |
930 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
931 | struct snd_pcm_substream *master) | |
1da177e4 LT |
932 | { |
933 | substream->runtime->trigger_master = master; | |
934 | } | |
935 | ||
936 | static inline int hw_is_mask(int var) | |
937 | { | |
938 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && | |
939 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; | |
940 | } | |
941 | ||
942 | static inline int hw_is_interval(int var) | |
943 | { | |
944 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && | |
945 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; | |
946 | } | |
947 | ||
877211f5 | 948 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
1da177e4 LT |
949 | snd_pcm_hw_param_t var) |
950 | { | |
951 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
952 | } | |
953 | ||
877211f5 | 954 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
1da177e4 LT |
955 | snd_pcm_hw_param_t var) |
956 | { | |
957 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
958 | } | |
959 | ||
877211f5 | 960 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
961 | snd_pcm_hw_param_t var) |
962 | { | |
b9f09a48 | 963 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
1da177e4 LT |
964 | } |
965 | ||
877211f5 | 966 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
967 | snd_pcm_hw_param_t var) |
968 | { | |
b9f09a48 | 969 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
1da177e4 LT |
970 | } |
971 | ||
85926e0f TI |
972 | /** |
973 | * params_channels - Get the number of channels from the hw params | |
974 | * @p: hw params | |
4e2b7067 TI |
975 | * |
976 | * Return: the number of channels | |
85926e0f TI |
977 | */ |
978 | static inline unsigned int params_channels(const struct snd_pcm_hw_params *p) | |
979 | { | |
980 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min; | |
981 | } | |
982 | ||
983 | /** | |
62f64a88 | 984 | * params_rate - Get the sample rate from the hw params |
85926e0f | 985 | * @p: hw params |
4e2b7067 TI |
986 | * |
987 | * Return: the sample rate | |
85926e0f TI |
988 | */ |
989 | static inline unsigned int params_rate(const struct snd_pcm_hw_params *p) | |
990 | { | |
991 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min; | |
992 | } | |
993 | ||
994 | /** | |
62f64a88 | 995 | * params_period_size - Get the period size (in frames) from the hw params |
85926e0f | 996 | * @p: hw params |
4e2b7067 TI |
997 | * |
998 | * Return: the period size in frames | |
85926e0f TI |
999 | */ |
1000 | static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p) | |
1001 | { | |
1002 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min; | |
1003 | } | |
1004 | ||
1005 | /** | |
62f64a88 | 1006 | * params_periods - Get the number of periods from the hw params |
85926e0f | 1007 | * @p: hw params |
4e2b7067 TI |
1008 | * |
1009 | * Return: the number of periods | |
85926e0f TI |
1010 | */ |
1011 | static inline unsigned int params_periods(const struct snd_pcm_hw_params *p) | |
1012 | { | |
1013 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min; | |
1014 | } | |
1015 | ||
1016 | /** | |
62f64a88 | 1017 | * params_buffer_size - Get the buffer size (in frames) from the hw params |
85926e0f | 1018 | * @p: hw params |
4e2b7067 TI |
1019 | * |
1020 | * Return: the buffer size in frames | |
85926e0f TI |
1021 | */ |
1022 | static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p) | |
1023 | { | |
1024 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min; | |
1025 | } | |
1026 | ||
1027 | /** | |
62f64a88 | 1028 | * params_buffer_bytes - Get the buffer size (in bytes) from the hw params |
85926e0f | 1029 | * @p: hw params |
4e2b7067 TI |
1030 | * |
1031 | * Return: the buffer size in bytes | |
85926e0f TI |
1032 | */ |
1033 | static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p) | |
1034 | { | |
1035 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min; | |
1036 | } | |
1da177e4 | 1037 | |
877211f5 | 1038 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
4af87a93 MB |
1039 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
1040 | const unsigned int *list, unsigned int mask); | |
f66f898e PR |
1041 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, |
1042 | const struct snd_interval *list, unsigned int mask); | |
877211f5 | 1043 | int snd_interval_ratnum(struct snd_interval *i, |
e5e113cf | 1044 | unsigned int rats_count, const struct snd_ratnum *rats, |
1da177e4 LT |
1045 | unsigned int *nump, unsigned int *denp); |
1046 | ||
877211f5 TI |
1047 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
1048 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); | |
1da177e4 | 1049 | |
877211f5 | 1050 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 1051 | |
877211f5 | 1052 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 1053 | u_int64_t mask); |
877211f5 | 1054 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 1055 | unsigned int min, unsigned int max); |
877211f5 TI |
1056 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
1057 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
1058 | unsigned int cond, |
1059 | snd_pcm_hw_param_t var, | |
1464189f | 1060 | const struct snd_pcm_hw_constraint_list *l); |
f66f898e PR |
1061 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, |
1062 | unsigned int cond, | |
1063 | snd_pcm_hw_param_t var, | |
1064 | const struct snd_pcm_hw_constraint_ranges *r); | |
877211f5 | 1065 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1066 | unsigned int cond, |
1067 | snd_pcm_hw_param_t var, | |
e5e113cf | 1068 | const struct snd_pcm_hw_constraint_ratnums *r); |
877211f5 | 1069 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1070 | unsigned int cond, |
1071 | snd_pcm_hw_param_t var, | |
e5e113cf | 1072 | const struct snd_pcm_hw_constraint_ratdens *r); |
877211f5 | 1073 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1074 | unsigned int cond, |
1075 | unsigned int width, | |
1076 | unsigned int msbits); | |
877211f5 | 1077 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1078 | unsigned int cond, |
1079 | snd_pcm_hw_param_t var, | |
1080 | unsigned long step); | |
877211f5 | 1081 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1082 | unsigned int cond, |
1083 | snd_pcm_hw_param_t var); | |
d5b702a6 CL |
1084 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, |
1085 | unsigned int base_rate); | |
877211f5 | 1086 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1087 | unsigned int cond, |
1088 | int var, | |
1089 | snd_pcm_hw_rule_func_t func, void *private, | |
1090 | int dep, ...); | |
1091 | ||
bc1043cd LPC |
1092 | /** |
1093 | * snd_pcm_hw_constraint_single() - Constrain parameter to a single value | |
1094 | * @runtime: PCM runtime instance | |
1095 | * @var: The hw_params variable to constrain | |
1096 | * @val: The value to constrain to | |
1097 | * | |
1098 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1099 | * negative error code. | |
1100 | */ | |
1101 | static inline int snd_pcm_hw_constraint_single( | |
1102 | struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, | |
1103 | unsigned int val) | |
1104 | { | |
1105 | return snd_pcm_hw_constraint_minmax(runtime, var, val, val); | |
1106 | } | |
1107 | ||
1da177e4 LT |
1108 | int snd_pcm_format_signed(snd_pcm_format_t format); |
1109 | int snd_pcm_format_unsigned(snd_pcm_format_t format); | |
1110 | int snd_pcm_format_linear(snd_pcm_format_t format); | |
1111 | int snd_pcm_format_little_endian(snd_pcm_format_t format); | |
1112 | int snd_pcm_format_big_endian(snd_pcm_format_t format); | |
52204718 | 1113 | #if 0 /* just for kernel-doc */ |
1b44c28d | 1114 | /** |
9502dcad TI |
1115 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
1116 | * @format: the format to check | |
1117 | * | |
eb7c06e8 | 1118 | * Return: 1 if the given PCM format is CPU-endian, 0 if |
9502dcad TI |
1119 | * opposite, or a negative error code if endian not specified. |
1120 | */ | |
8cdfd251 | 1121 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
1b44c28d | 1122 | #endif /* DocBook */ |
9502dcad | 1123 | #ifdef SNDRV_LITTLE_ENDIAN |
9d01a82e | 1124 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
9502dcad | 1125 | #else |
9d01a82e | 1126 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
9502dcad | 1127 | #endif |
1da177e4 LT |
1128 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
1129 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ | |
9502dcad | 1130 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
1da177e4 LT |
1131 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
1132 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); | |
1da177e4 | 1133 | |
e6c2e7eb LPC |
1134 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, |
1135 | const struct snd_pcm_ops *ops); | |
877211f5 | 1136 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); |
877211f5 | 1137 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 | 1138 | unsigned int cmd, void *arg); |
47271b1b | 1139 | void snd_pcm_period_elapsed_under_stream_lock(struct snd_pcm_substream *substream); |
877211f5 | 1140 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); |
5c7264cf | 1141 | snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream, |
c48f12ee | 1142 | void *buf, bool interleaved, |
68541213 | 1143 | snd_pcm_uframes_t frames, bool in_kernel); |
c48f12ee TI |
1144 | |
1145 | static inline snd_pcm_sframes_t | |
1146 | snd_pcm_lib_write(struct snd_pcm_substream *substream, | |
1147 | const void __user *buf, snd_pcm_uframes_t frames) | |
1148 | { | |
95a48b7d | 1149 | return __snd_pcm_lib_xfer(substream, (void __force *)buf, true, frames, false); |
c48f12ee TI |
1150 | } |
1151 | ||
1152 | static inline snd_pcm_sframes_t | |
1153 | snd_pcm_lib_read(struct snd_pcm_substream *substream, | |
1154 | void __user *buf, snd_pcm_uframes_t frames) | |
1155 | { | |
95a48b7d | 1156 | return __snd_pcm_lib_xfer(substream, (void __force *)buf, true, frames, false); |
c48f12ee TI |
1157 | } |
1158 | ||
1159 | static inline snd_pcm_sframes_t | |
1160 | snd_pcm_lib_writev(struct snd_pcm_substream *substream, | |
1161 | void __user **bufs, snd_pcm_uframes_t frames) | |
1162 | { | |
68541213 | 1163 | return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames, false); |
c48f12ee TI |
1164 | } |
1165 | ||
1166 | static inline snd_pcm_sframes_t | |
1167 | snd_pcm_lib_readv(struct snd_pcm_substream *substream, | |
1168 | void __user **bufs, snd_pcm_uframes_t frames) | |
1169 | { | |
68541213 TI |
1170 | return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames, false); |
1171 | } | |
1172 | ||
1173 | static inline snd_pcm_sframes_t | |
1174 | snd_pcm_kernel_write(struct snd_pcm_substream *substream, | |
1175 | const void *buf, snd_pcm_uframes_t frames) | |
1176 | { | |
1177 | return __snd_pcm_lib_xfer(substream, (void *)buf, true, frames, true); | |
1178 | } | |
1179 | ||
1180 | static inline snd_pcm_sframes_t | |
1181 | snd_pcm_kernel_read(struct snd_pcm_substream *substream, | |
1182 | void *buf, snd_pcm_uframes_t frames) | |
1183 | { | |
1184 | return __snd_pcm_lib_xfer(substream, buf, true, frames, true); | |
1185 | } | |
1186 | ||
1187 | static inline snd_pcm_sframes_t | |
1188 | snd_pcm_kernel_writev(struct snd_pcm_substream *substream, | |
1189 | void **bufs, snd_pcm_uframes_t frames) | |
1190 | { | |
1191 | return __snd_pcm_lib_xfer(substream, bufs, false, frames, true); | |
1192 | } | |
1193 | ||
1194 | static inline snd_pcm_sframes_t | |
1195 | snd_pcm_kernel_readv(struct snd_pcm_substream *substream, | |
1196 | void **bufs, snd_pcm_uframes_t frames) | |
1197 | { | |
1198 | return __snd_pcm_lib_xfer(substream, bufs, false, frames, true); | |
c48f12ee | 1199 | } |
1da177e4 | 1200 | |
4769bfb9 SH |
1201 | int snd_pcm_hw_limit_rates(struct snd_pcm_hardware *hw); |
1202 | ||
1203 | static inline int | |
1204 | snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime) | |
1205 | { | |
1206 | return snd_pcm_hw_limit_rates(&runtime->hw); | |
1207 | } | |
1208 | ||
918f3a0e | 1209 | unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); |
4be77a53 | 1210 | unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); |
e3a9269f LPC |
1211 | unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a, |
1212 | unsigned int rates_b); | |
3bdff244 ML |
1213 | unsigned int snd_pcm_rate_range_to_bits(unsigned int rate_min, |
1214 | unsigned int rate_max); | |
1da177e4 | 1215 | |
30b771cf TI |
1216 | /** |
1217 | * snd_pcm_set_runtime_buffer - Set the PCM runtime buffer | |
1218 | * @substream: PCM substream to set | |
1219 | * @bufp: the buffer information, NULL to clear | |
1220 | * | |
1221 | * Copy the buffer information to runtime->dma_buffer when @bufp is non-NULL. | |
1222 | * Otherwise it clears the current buffer information. | |
1223 | */ | |
877211f5 | 1224 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1225 | struct snd_dma_buffer *bufp) |
1226 | { | |
877211f5 | 1227 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1228 | if (bufp) { |
1229 | runtime->dma_buffer_p = bufp; | |
1230 | runtime->dma_area = bufp->area; | |
1231 | runtime->dma_addr = bufp->addr; | |
1232 | runtime->dma_bytes = bufp->bytes; | |
1233 | } else { | |
1234 | runtime->dma_buffer_p = NULL; | |
1235 | runtime->dma_area = NULL; | |
1236 | runtime->dma_addr = 0; | |
1237 | runtime->dma_bytes = 0; | |
1238 | } | |
1239 | } | |
1240 | ||
30b771cf | 1241 | /** |
fcae40c9 | 1242 | * snd_pcm_gettime - Fill the timespec64 depending on the timestamp mode |
30b771cf | 1243 | * @runtime: PCM runtime instance |
fcae40c9 | 1244 | * @tv: timespec64 to fill |
30b771cf | 1245 | */ |
b751eef1 | 1246 | static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, |
fcae40c9 | 1247 | struct timespec64 *tv) |
b751eef1 | 1248 | { |
0ac8a52d MB |
1249 | switch (runtime->tstamp_type) { |
1250 | case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC: | |
fcae40c9 | 1251 | ktime_get_ts64(tv); |
0ac8a52d MB |
1252 | break; |
1253 | case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW: | |
fcae40c9 | 1254 | ktime_get_raw_ts64(tv); |
0ac8a52d MB |
1255 | break; |
1256 | default: | |
fcae40c9 | 1257 | ktime_get_real_ts64(tv); |
0ac8a52d MB |
1258 | break; |
1259 | } | |
b751eef1 JK |
1260 | } |
1261 | ||
1da177e4 LT |
1262 | /* |
1263 | * Memory | |
1264 | */ | |
1265 | ||
bb580602 TI |
1266 | void snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
1267 | void snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); | |
1268 | void snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, | |
1da177e4 LT |
1269 | int type, struct device *data, |
1270 | size_t size, size_t max); | |
bb580602 | 1271 | void snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
1da177e4 LT |
1272 | int type, void *data, |
1273 | size_t size, size_t max); | |
877211f5 TI |
1274 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
1275 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); | |
1da177e4 | 1276 | |
ac9245a5 TI |
1277 | int snd_pcm_set_managed_buffer(struct snd_pcm_substream *substream, int type, |
1278 | struct device *data, size_t size, size_t max); | |
1279 | int snd_pcm_set_managed_buffer_all(struct snd_pcm *pcm, int type, | |
1280 | struct device *data, | |
1281 | size_t size, size_t max); | |
1282 | ||
1283 | /** | |
1284 | * snd_pcm_set_fixed_buffer - Preallocate and set up the fixed size PCM buffer | |
1285 | * @substream: the pcm substream instance | |
1286 | * @type: DMA type (SNDRV_DMA_TYPE_*) | |
1287 | * @data: DMA type dependent data | |
1288 | * @size: the requested pre-allocation size in bytes | |
1289 | * | |
1290 | * This is a variant of snd_pcm_set_managed_buffer(), but this pre-allocates | |
1291 | * only the given sized buffer and doesn't allow re-allocation nor dynamic | |
1292 | * allocation of a larger buffer unlike the standard one. | |
1293 | * The function may return -ENOMEM error, hence the caller must check it. | |
4e2b7067 TI |
1294 | * |
1295 | * Return: zero if successful, or a negative error code | |
ac9245a5 TI |
1296 | */ |
1297 | static inline int __must_check | |
1298 | snd_pcm_set_fixed_buffer(struct snd_pcm_substream *substream, int type, | |
1299 | struct device *data, size_t size) | |
1300 | { | |
1301 | return snd_pcm_set_managed_buffer(substream, type, data, size, 0); | |
1302 | } | |
1303 | ||
1304 | /** | |
1305 | * snd_pcm_set_fixed_buffer_all - Preallocate and set up the fixed size PCM buffer | |
1306 | * @pcm: the pcm instance | |
1307 | * @type: DMA type (SNDRV_DMA_TYPE_*) | |
1308 | * @data: DMA type dependent data | |
1309 | * @size: the requested pre-allocation size in bytes | |
1310 | * | |
1311 | * Apply the set up of the fixed buffer via snd_pcm_set_fixed_buffer() for | |
1312 | * all substream. If any of allocation fails, it returns -ENOMEM, hence the | |
1313 | * caller must check the return value. | |
4e2b7067 TI |
1314 | * |
1315 | * Return: zero if successful, or a negative error code | |
ac9245a5 TI |
1316 | */ |
1317 | static inline int __must_check | |
1318 | snd_pcm_set_fixed_buffer_all(struct snd_pcm *pcm, int type, | |
1319 | struct device *data, size_t size) | |
1320 | { | |
1321 | return snd_pcm_set_managed_buffer_all(pcm, type, data, size, 0); | |
1322 | } | |
0dba808e | 1323 | |
681b84e1 CL |
1324 | int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, |
1325 | size_t size, gfp_t gfp_flags); | |
1326 | int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); | |
1327 | struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, | |
1328 | unsigned long offset); | |
681b84e1 CL |
1329 | /** |
1330 | * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer | |
1331 | * @substream: the substream to allocate the buffer to | |
1332 | * @size: the requested buffer size, in bytes | |
1333 | * | |
1334 | * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is | |
1335 | * contiguous in kernel virtual space, but not in physical memory. Use this | |
1336 | * if the buffer is accessed by kernel code but not by device DMA. | |
1337 | * | |
eb7c06e8 | 1338 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error |
681b84e1 CL |
1339 | * code. |
1340 | */ | |
f213d8f7 TI |
1341 | static inline int snd_pcm_lib_alloc_vmalloc_buffer |
1342 | (struct snd_pcm_substream *substream, size_t size) | |
1343 | { | |
1344 | return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, | |
1345 | GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO); | |
1346 | } | |
1347 | ||
681b84e1 CL |
1348 | /** |
1349 | * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer | |
1350 | * @substream: the substream to allocate the buffer to | |
1351 | * @size: the requested buffer size, in bytes | |
1352 | * | |
1353 | * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses | |
1354 | * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. | |
eb7c06e8 YB |
1355 | * |
1356 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error | |
1357 | * code. | |
681b84e1 | 1358 | */ |
f213d8f7 TI |
1359 | static inline int snd_pcm_lib_alloc_vmalloc_32_buffer |
1360 | (struct snd_pcm_substream *substream, size_t size) | |
1361 | { | |
1362 | return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, | |
1363 | GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); | |
1364 | } | |
681b84e1 | 1365 | |
9d069dc0 TI |
1366 | #define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p) |
1367 | ||
30b771cf TI |
1368 | /** |
1369 | * snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset | |
1370 | * @substream: PCM substream | |
1371 | * @ofs: byte offset | |
4e2b7067 TI |
1372 | * |
1373 | * Return: DMA address | |
30b771cf | 1374 | */ |
cc6a8acd TI |
1375 | static inline dma_addr_t |
1376 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) | |
1377 | { | |
9d069dc0 | 1378 | return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs); |
cc6a8acd TI |
1379 | } |
1380 | ||
30b771cf | 1381 | /** |
f7b6603c MCC |
1382 | * snd_pcm_sgbuf_get_chunk_size - Compute the max size that fits within the |
1383 | * contig. page from the given size | |
30b771cf TI |
1384 | * @substream: PCM substream |
1385 | * @ofs: byte offset | |
1386 | * @size: byte size to examine | |
4e2b7067 TI |
1387 | * |
1388 | * Return: chunk size | |
30b771cf | 1389 | */ |
9d069dc0 TI |
1390 | static inline unsigned int |
1391 | snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, | |
1392 | unsigned int ofs, unsigned int size) | |
1393 | { | |
1394 | return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size); | |
1395 | } | |
cc6a8acd | 1396 | |
30b771cf TI |
1397 | /** |
1398 | * snd_pcm_mmap_data_open - increase the mmap counter | |
1399 | * @area: VMA | |
1400 | * | |
1401 | * PCM mmap callback should handle this counter properly | |
1402 | */ | |
1da177e4 LT |
1403 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) |
1404 | { | |
877211f5 | 1405 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 1406 | atomic_inc(&substream->mmap_count); |
1da177e4 LT |
1407 | } |
1408 | ||
30b771cf TI |
1409 | /** |
1410 | * snd_pcm_mmap_data_close - decrease the mmap counter | |
1411 | * @area: VMA | |
1412 | * | |
1413 | * PCM mmap callback should handle this counter properly | |
1414 | */ | |
1da177e4 LT |
1415 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) |
1416 | { | |
877211f5 | 1417 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 1418 | atomic_dec(&substream->mmap_count); |
1da177e4 LT |
1419 | } |
1420 | ||
18a2b962 TI |
1421 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
1422 | struct vm_area_struct *area); | |
1da177e4 LT |
1423 | /* mmap for io-memory area */ |
1424 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
1425 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP | |
877211f5 | 1426 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
1da177e4 LT |
1427 | #else |
1428 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 | |
1429 | #define snd_pcm_lib_mmap_iomem NULL | |
1430 | #endif | |
1431 | ||
30b771cf TI |
1432 | /** |
1433 | * snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer | |
1434 | * @dma: DMA number | |
1435 | * @max: pointer to store the max size | |
1436 | */ | |
1da177e4 LT |
1437 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) |
1438 | { | |
1439 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; | |
1440 | } | |
1441 | ||
1442 | /* | |
1443 | * Misc | |
1444 | */ | |
1445 | ||
1446 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ | |
1447 | (IEC958_AES1_CON_ORIGINAL<<8)|\ | |
1448 | (IEC958_AES1_CON_PCM_CODER<<8)|\ | |
1449 | (IEC958_AES3_CON_FS_48000<<24)) | |
1450 | ||
6e5265ec TI |
1451 | const char *snd_pcm_format_name(snd_pcm_format_t format); |
1452 | ||
90b12a88 CR |
1453 | /** |
1454 | * snd_pcm_direction_name - Get a string naming the direction of a stream | |
1455 | * @direction: Stream's direction, one of SNDRV_PCM_STREAM_XXX | |
1456 | * | |
1457 | * Returns a string naming the direction of the stream. | |
1458 | */ | |
1459 | static inline const char *snd_pcm_direction_name(int direction) | |
1460 | { | |
1461 | if (direction == SNDRV_PCM_STREAM_PLAYBACK) | |
1462 | return "Playback"; | |
1463 | else | |
1464 | return "Capture"; | |
1465 | } | |
1466 | ||
1aad779f | 1467 | /** |
8513915a RD |
1468 | * snd_pcm_stream_str - Get a string naming the direction of a stream |
1469 | * @substream: the pcm substream instance | |
eb7c06e8 YB |
1470 | * |
1471 | * Return: A string naming the direction of the stream. | |
1aad779f OL |
1472 | */ |
1473 | static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream) | |
1474 | { | |
90b12a88 | 1475 | return snd_pcm_direction_name(substream->stream); |
1aad779f OL |
1476 | } |
1477 | ||
2d3391ec TI |
1478 | /* |
1479 | * PCM channel-mapping control API | |
1480 | */ | |
1481 | /* array element of channel maps */ | |
1482 | struct snd_pcm_chmap_elem { | |
1483 | unsigned char channels; | |
1484 | unsigned char map[15]; | |
1485 | }; | |
1486 | ||
1487 | /* channel map information; retrieved via snd_kcontrol_chip() */ | |
1488 | struct snd_pcm_chmap { | |
1489 | struct snd_pcm *pcm; /* assigned PCM instance */ | |
1490 | int stream; /* PLAYBACK or CAPTURE */ | |
1491 | struct snd_kcontrol *kctl; | |
1492 | const struct snd_pcm_chmap_elem *chmap; | |
1493 | unsigned int max_channels; | |
1494 | unsigned int channel_mask; /* optional: active channels bitmask */ | |
1495 | void *private_data; /* optional: private data pointer */ | |
1496 | }; | |
1497 | ||
30b771cf TI |
1498 | /** |
1499 | * snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info | |
1500 | * @info: chmap information | |
1501 | * @idx: the substream number index | |
4e2b7067 TI |
1502 | * |
1503 | * Return: the matched PCM substream, or NULL if not found | |
30b771cf | 1504 | */ |
2d3391ec TI |
1505 | static inline struct snd_pcm_substream * |
1506 | snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) | |
1507 | { | |
1508 | struct snd_pcm_substream *s; | |
1509 | for (s = info->pcm->streams[info->stream].substream; s; s = s->next) | |
1510 | if (s->number == idx) | |
1511 | return s; | |
1512 | return NULL; | |
1513 | } | |
1514 | ||
1515 | /* ALSA-standard channel maps (RL/RR prior to C/LFE) */ | |
1516 | extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[]; | |
1517 | /* Other world's standard channel maps (C/LFE prior to RL/RR) */ | |
1518 | extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[]; | |
1519 | ||
1520 | /* bit masks to be passed to snd_pcm_chmap.channel_mask field */ | |
1521 | #define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4)) | |
1522 | #define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6)) | |
1523 | #define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8)) | |
1524 | ||
1525 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
1526 | const struct snd_pcm_chmap_elem *chmap, | |
1527 | int max_channels, | |
1528 | unsigned long private_value, | |
1529 | struct snd_pcm_chmap **info_ret); | |
1530 | ||
30b771cf TI |
1531 | /** |
1532 | * pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise | |
1533 | * @pcm_format: PCM format | |
4e2b7067 TI |
1534 | * |
1535 | * Return: 64bit mask corresponding to the given PCM format | |
30b771cf | 1536 | */ |
74c34ca1 EZ |
1537 | static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) |
1538 | { | |
1539 | return 1ULL << (__force int) pcm_format; | |
1540 | } | |
1541 | ||
b9c7d410 TI |
1542 | /** |
1543 | * pcm_for_each_format - helper to iterate for each format type | |
1544 | * @f: the iterator variable in snd_pcm_format_t type | |
1545 | */ | |
1546 | #define pcm_for_each_format(f) \ | |
1547 | for ((f) = SNDRV_PCM_FORMAT_FIRST; \ | |
1548 | (__force int)(f) <= (__force int)SNDRV_PCM_FORMAT_LAST; \ | |
1549 | (f) = (__force snd_pcm_format_t)((__force int)(f) + 1)) | |
1550 | ||
09e56df8 TI |
1551 | /* printk helpers */ |
1552 | #define pcm_err(pcm, fmt, args...) \ | |
1553 | dev_err((pcm)->card->dev, fmt, ##args) | |
1554 | #define pcm_warn(pcm, fmt, args...) \ | |
1555 | dev_warn((pcm)->card->dev, fmt, ##args) | |
1556 | #define pcm_dbg(pcm, fmt, args...) \ | |
1557 | dev_dbg((pcm)->card->dev, fmt, ##args) | |
1558 | ||
3ddee7f8 BW |
1559 | struct snd_pcm_status64 { |
1560 | snd_pcm_state_t state; /* stream state */ | |
1561 | u8 rsvd[4]; | |
1562 | s64 trigger_tstamp_sec; /* time when stream was started/stopped/paused */ | |
1563 | s64 trigger_tstamp_nsec; | |
1564 | s64 tstamp_sec; /* reference timestamp */ | |
1565 | s64 tstamp_nsec; | |
1566 | snd_pcm_uframes_t appl_ptr; /* appl ptr */ | |
1567 | snd_pcm_uframes_t hw_ptr; /* hw ptr */ | |
1568 | snd_pcm_sframes_t delay; /* current delay in frames */ | |
1569 | snd_pcm_uframes_t avail; /* number of frames available */ | |
1570 | snd_pcm_uframes_t avail_max; /* max frames available on hw since last status */ | |
1571 | snd_pcm_uframes_t overrange; /* count of ADC (capture) overrange detections from last status */ | |
1572 | snd_pcm_state_t suspended_state; /* suspended stream state */ | |
1573 | __u32 audio_tstamp_data; /* needed for 64-bit alignment, used for configs/report to/from userspace */ | |
1574 | s64 audio_tstamp_sec; /* sample counter, wall clock, PHC or on-demand sync'ed */ | |
1575 | s64 audio_tstamp_nsec; | |
1576 | s64 driver_tstamp_sec; /* useful in case reference system tstamp is reported with delay */ | |
1577 | s64 driver_tstamp_nsec; | |
1578 | __u32 audio_tstamp_accuracy; /* in ns units, only valid if indicated in audio_tstamp_data */ | |
1579 | unsigned char reserved[52-4*sizeof(s64)]; /* must be filled with zero */ | |
1580 | }; | |
1581 | ||
1582 | #define SNDRV_PCM_IOCTL_STATUS64 _IOR('A', 0x20, struct snd_pcm_status64) | |
1583 | #define SNDRV_PCM_IOCTL_STATUS_EXT64 _IOWR('A', 0x24, struct snd_pcm_status64) | |
1584 | ||
1585 | struct snd_pcm_status32 { | |
cb639a42 | 1586 | snd_pcm_state_t state; /* stream state */ |
3ddee7f8 BW |
1587 | s32 trigger_tstamp_sec; /* time when stream was started/stopped/paused */ |
1588 | s32 trigger_tstamp_nsec; | |
1589 | s32 tstamp_sec; /* reference timestamp */ | |
1590 | s32 tstamp_nsec; | |
1591 | u32 appl_ptr; /* appl ptr */ | |
1592 | u32 hw_ptr; /* hw ptr */ | |
1593 | s32 delay; /* current delay in frames */ | |
1594 | u32 avail; /* number of frames available */ | |
1595 | u32 avail_max; /* max frames available on hw since last status */ | |
1596 | u32 overrange; /* count of ADC (capture) overrange detections from last status */ | |
cb639a42 | 1597 | snd_pcm_state_t suspended_state; /* suspended stream state */ |
3ddee7f8 BW |
1598 | u32 audio_tstamp_data; /* needed for 64-bit alignment, used for configs/report to/from userspace */ |
1599 | s32 audio_tstamp_sec; /* sample counter, wall clock, PHC or on-demand sync'ed */ | |
1600 | s32 audio_tstamp_nsec; | |
1601 | s32 driver_tstamp_sec; /* useful in case reference system tstamp is reported with delay */ | |
1602 | s32 driver_tstamp_nsec; | |
1603 | u32 audio_tstamp_accuracy; /* in ns units, only valid if indicated in audio_tstamp_data */ | |
1604 | unsigned char reserved[52-4*sizeof(s32)]; /* must be filled with zero */ | |
1605 | }; | |
1606 | ||
1607 | #define SNDRV_PCM_IOCTL_STATUS32 _IOR('A', 0x20, struct snd_pcm_status32) | |
1608 | #define SNDRV_PCM_IOCTL_STATUS_EXT32 _IOWR('A', 0x24, struct snd_pcm_status32) | |
1609 | ||
1da177e4 | 1610 | #endif /* __SOUND_PCM_H */ |