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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 | ||
229d0430 PLB |
63 | struct snd_pcm_audio_tstamp_config; /* definitions further down */ |
64 | struct snd_pcm_audio_tstamp_report; | |
65 | ||
877211f5 TI |
66 | struct snd_pcm_ops { |
67 | int (*open)(struct snd_pcm_substream *substream); | |
68 | int (*close)(struct snd_pcm_substream *substream); | |
69 | int (*ioctl)(struct snd_pcm_substream * substream, | |
1da177e4 | 70 | unsigned int cmd, void *arg); |
877211f5 TI |
71 | int (*hw_params)(struct snd_pcm_substream *substream, |
72 | struct snd_pcm_hw_params *params); | |
73 | int (*hw_free)(struct snd_pcm_substream *substream); | |
74 | int (*prepare)(struct snd_pcm_substream *substream); | |
75 | int (*trigger)(struct snd_pcm_substream *substream, int cmd); | |
76 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); | |
3179f620 PLB |
77 | int (*get_time_info)(struct snd_pcm_substream *substream, |
78 | struct timespec *system_ts, struct timespec *audio_ts, | |
79 | struct snd_pcm_audio_tstamp_config *audio_tstamp_config, | |
80 | struct snd_pcm_audio_tstamp_report *audio_tstamp_report); | |
877211f5 TI |
81 | int (*copy)(struct snd_pcm_substream *substream, int channel, |
82 | snd_pcm_uframes_t pos, | |
1da177e4 | 83 | void __user *buf, snd_pcm_uframes_t count); |
877211f5 | 84 | int (*silence)(struct snd_pcm_substream *substream, int channel, |
1da177e4 | 85 | snd_pcm_uframes_t pos, snd_pcm_uframes_t count); |
877211f5 TI |
86 | struct page *(*page)(struct snd_pcm_substream *substream, |
87 | unsigned long offset); | |
88 | int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); | |
89 | int (*ack)(struct snd_pcm_substream *substream); | |
90 | }; | |
1da177e4 LT |
91 | |
92 | /* | |
93 | * | |
94 | */ | |
95 | ||
f90c06a2 PM |
96 | #if defined(CONFIG_SND_DYNAMIC_MINORS) |
97 | #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2) | |
98 | #else | |
99 | #define SNDRV_PCM_DEVICES 8 | |
100 | #endif | |
896e6cc2 | 101 | |
1da177e4 LT |
102 | #define SNDRV_PCM_IOCTL1_RESET 0 |
103 | #define SNDRV_PCM_IOCTL1_INFO 1 | |
104 | #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 | |
105 | #define SNDRV_PCM_IOCTL1_GSTATE 3 | |
8bea869c | 106 | #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 |
1da177e4 LT |
107 | |
108 | #define SNDRV_PCM_TRIGGER_STOP 0 | |
109 | #define SNDRV_PCM_TRIGGER_START 1 | |
110 | #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 | |
111 | #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 | |
112 | #define SNDRV_PCM_TRIGGER_SUSPEND 5 | |
113 | #define SNDRV_PCM_TRIGGER_RESUME 6 | |
48d88297 | 114 | #define SNDRV_PCM_TRIGGER_DRAIN 7 |
1da177e4 LT |
115 | |
116 | #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) | |
117 | ||
118 | /* If you change this don't forget to change rates[] table in pcm_native.c */ | |
119 | #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ | |
120 | #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ | |
121 | #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ | |
122 | #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ | |
123 | #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ | |
124 | #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ | |
125 | #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ | |
126 | #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ | |
127 | #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ | |
128 | #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ | |
129 | #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ | |
130 | #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ | |
131 | #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ | |
132 | ||
133 | #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ | |
134 | #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ | |
135 | ||
136 | #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ | |
137 | SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ | |
138 | SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) | |
139 | #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) | |
140 | #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ | |
141 | SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) | |
142 | #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ | |
143 | SNDRV_PCM_RATE_192000) | |
fea952e5 CL |
144 | #define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt) |
145 | #define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8) | |
146 | #define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8) | |
147 | #define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE) | |
148 | #define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE) | |
149 | #define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE) | |
150 | #define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE) | |
151 | #define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE) | |
152 | #define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE) | |
153 | #define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE) | |
154 | #define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE) | |
155 | #define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE) | |
156 | #define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE) | |
157 | #define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE) | |
158 | #define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE) | |
159 | #define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE) | |
160 | #define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE) | |
161 | #define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE) | |
162 | #define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE) | |
163 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE) | |
164 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE) | |
165 | #define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW) | |
166 | #define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW) | |
167 | #define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM) | |
168 | #define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG) | |
169 | #define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM) | |
170 | #define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL) | |
171 | #define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE) | |
172 | #define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE) | |
173 | #define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE) | |
174 | #define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE) | |
175 | #define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE) | |
176 | #define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE) | |
177 | #define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE) | |
178 | #define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE) | |
179 | #define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE) | |
180 | #define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE) | |
181 | #define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE) | |
182 | #define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE) | |
183 | #define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24) | |
184 | #define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B) | |
185 | #define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40) | |
186 | #define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B) | |
ef7a4f97 DM |
187 | #define SNDRV_PCM_FMTBIT_DSD_U8 _SNDRV_PCM_FMTBIT(DSD_U8) |
188 | #define SNDRV_PCM_FMTBIT_DSD_U16_LE _SNDRV_PCM_FMTBIT(DSD_U16_LE) | |
d4288d3f | 189 | #define SNDRV_PCM_FMTBIT_DSD_U32_LE _SNDRV_PCM_FMTBIT(DSD_U32_LE) |
d42472ec JL |
190 | #define SNDRV_PCM_FMTBIT_DSD_U16_BE _SNDRV_PCM_FMTBIT(DSD_U16_BE) |
191 | #define SNDRV_PCM_FMTBIT_DSD_U32_BE _SNDRV_PCM_FMTBIT(DSD_U32_BE) | |
1da177e4 LT |
192 | |
193 | #ifdef SNDRV_LITTLE_ENDIAN | |
194 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE | |
195 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE | |
196 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE | |
197 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE | |
198 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE | |
199 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE | |
200 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE | |
201 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE | |
202 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | |
203 | #endif | |
204 | #ifdef SNDRV_BIG_ENDIAN | |
205 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE | |
206 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE | |
207 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE | |
208 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE | |
209 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE | |
210 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE | |
211 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE | |
212 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE | |
213 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE | |
214 | #endif | |
215 | ||
877211f5 TI |
216 | struct snd_pcm_file { |
217 | struct snd_pcm_substream *substream; | |
548a648b | 218 | int no_compat_mmap; |
1da177e4 LT |
219 | }; |
220 | ||
877211f5 TI |
221 | struct snd_pcm_hw_rule; |
222 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, | |
223 | struct snd_pcm_hw_rule *rule); | |
1da177e4 | 224 | |
877211f5 | 225 | struct snd_pcm_hw_rule { |
1da177e4 LT |
226 | unsigned int cond; |
227 | snd_pcm_hw_rule_func_t func; | |
228 | int var; | |
229 | int deps[4]; | |
230 | void *private; | |
231 | }; | |
232 | ||
877211f5 TI |
233 | struct snd_pcm_hw_constraints { |
234 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - | |
1da177e4 | 235 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
877211f5 | 236 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
1da177e4 LT |
237 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
238 | unsigned int rules_num; | |
239 | unsigned int rules_all; | |
877211f5 TI |
240 | struct snd_pcm_hw_rule *rules; |
241 | }; | |
1da177e4 | 242 | |
877211f5 TI |
243 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
244 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
245 | { |
246 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
247 | } | |
248 | ||
877211f5 TI |
249 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
250 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
251 | { |
252 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
253 | } | |
254 | ||
877211f5 | 255 | struct snd_ratnum { |
1da177e4 LT |
256 | unsigned int num; |
257 | unsigned int den_min, den_max, den_step; | |
877211f5 | 258 | }; |
1da177e4 | 259 | |
877211f5 | 260 | struct snd_ratden { |
1da177e4 LT |
261 | unsigned int num_min, num_max, num_step; |
262 | unsigned int den; | |
877211f5 | 263 | }; |
1da177e4 | 264 | |
877211f5 | 265 | struct snd_pcm_hw_constraint_ratnums { |
1da177e4 | 266 | int nrats; |
877211f5 TI |
267 | struct snd_ratnum *rats; |
268 | }; | |
1da177e4 | 269 | |
877211f5 | 270 | struct snd_pcm_hw_constraint_ratdens { |
1da177e4 | 271 | int nrats; |
877211f5 TI |
272 | struct snd_ratden *rats; |
273 | }; | |
1da177e4 | 274 | |
877211f5 | 275 | struct snd_pcm_hw_constraint_list { |
1da177e4 | 276 | unsigned int count; |
4af87a93 | 277 | const unsigned int *list; |
1da177e4 | 278 | unsigned int mask; |
877211f5 | 279 | }; |
1da177e4 | 280 | |
f66f898e PR |
281 | struct snd_pcm_hw_constraint_ranges { |
282 | unsigned int count; | |
283 | const struct snd_interval *ranges; | |
284 | unsigned int mask; | |
285 | }; | |
286 | ||
4d96eb25 JK |
287 | struct snd_pcm_hwptr_log; |
288 | ||
229d0430 PLB |
289 | /* |
290 | * userspace-provided audio timestamp config to kernel, | |
291 | * structure is for internal use only and filled with dedicated unpack routine | |
292 | */ | |
293 | struct snd_pcm_audio_tstamp_config { | |
294 | /* 5 of max 16 bits used */ | |
295 | u32 type_requested:4; | |
296 | u32 report_delay:1; /* add total delay to A/D or D/A */ | |
297 | }; | |
298 | ||
299 | static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data, | |
300 | struct snd_pcm_audio_tstamp_config *config) | |
301 | { | |
302 | config->type_requested = data & 0xF; | |
303 | config->report_delay = (data >> 4) & 1; | |
304 | } | |
305 | ||
306 | /* | |
307 | * kernel-provided audio timestamp report to user-space | |
308 | * structure is for internal use only and read by dedicated pack routine | |
309 | */ | |
310 | struct snd_pcm_audio_tstamp_report { | |
311 | /* 6 of max 16 bits used for bit-fields */ | |
312 | ||
313 | /* for backwards compatibility */ | |
314 | u32 valid:1; | |
315 | ||
316 | /* actual type if hardware could not support requested timestamp */ | |
317 | u32 actual_type:4; | |
318 | ||
319 | /* accuracy represented in ns units */ | |
320 | u32 accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */ | |
321 | u32 accuracy; /* up to 4.29s, will be packed in separate field */ | |
322 | }; | |
323 | ||
324 | static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy, | |
325 | const struct snd_pcm_audio_tstamp_report *report) | |
326 | { | |
327 | u32 tmp; | |
328 | ||
329 | tmp = report->accuracy_report; | |
330 | tmp <<= 4; | |
331 | tmp |= report->actual_type; | |
332 | tmp <<= 1; | |
333 | tmp |= report->valid; | |
334 | ||
335 | *data &= 0xffff; /* zero-clear MSBs */ | |
336 | *data |= (tmp << 16); | |
337 | *accuracy = report->accuracy; | |
338 | } | |
339 | ||
340 | ||
877211f5 | 341 | struct snd_pcm_runtime { |
1da177e4 | 342 | /* -- Status -- */ |
877211f5 | 343 | struct snd_pcm_substream *trigger_master; |
07799e75 | 344 | struct timespec trigger_tstamp; /* trigger timestamp */ |
2b79d7a6 | 345 | bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */ |
1da177e4 LT |
346 | int overrange; |
347 | snd_pcm_uframes_t avail_max; | |
348 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ | |
e7636925 | 349 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ |
bbf6ad13 | 350 | unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ |
bd76af0f | 351 | unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ |
4bbe1ddf | 352 | snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ |
0e8014d7 | 353 | u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */ |
1da177e4 LT |
354 | |
355 | /* -- HW params -- */ | |
356 | snd_pcm_access_t access; /* access mode */ | |
357 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ | |
358 | snd_pcm_subformat_t subformat; /* subformat */ | |
359 | unsigned int rate; /* rate in Hz */ | |
360 | unsigned int channels; /* channels */ | |
361 | snd_pcm_uframes_t period_size; /* period size */ | |
362 | unsigned int periods; /* periods */ | |
363 | snd_pcm_uframes_t buffer_size; /* buffer size */ | |
1da177e4 LT |
364 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ |
365 | size_t byte_align; | |
366 | unsigned int frame_bits; | |
367 | unsigned int sample_bits; | |
368 | unsigned int info; | |
369 | unsigned int rate_num; | |
370 | unsigned int rate_den; | |
ab69a490 | 371 | unsigned int no_period_wakeup: 1; |
1da177e4 LT |
372 | |
373 | /* -- SW params -- */ | |
877211f5 | 374 | int tstamp_mode; /* mmap timestamp is updated */ |
1da177e4 | 375 | unsigned int period_step; |
1da177e4 LT |
376 | snd_pcm_uframes_t start_threshold; |
377 | snd_pcm_uframes_t stop_threshold; | |
378 | snd_pcm_uframes_t silence_threshold; /* Silence filling happens when | |
379 | noise is nearest than this */ | |
380 | snd_pcm_uframes_t silence_size; /* Silence filling size */ | |
381 | snd_pcm_uframes_t boundary; /* pointers wrap point */ | |
382 | ||
383 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ | |
384 | snd_pcm_uframes_t silence_filled; /* size filled with silence */ | |
385 | ||
877211f5 | 386 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ |
1da177e4 LT |
387 | |
388 | /* -- mmap -- */ | |
503fc85a TI |
389 | struct snd_pcm_mmap_status *status; |
390 | struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
391 | |
392 | /* -- locking / scheduling -- */ | |
5daeba34 | 393 | snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ |
c91a988d JK |
394 | wait_queue_head_t sleep; /* poll sleep */ |
395 | wait_queue_head_t tsleep; /* transfer sleep */ | |
1da177e4 LT |
396 | struct fasync_struct *fasync; |
397 | ||
398 | /* -- private section -- */ | |
399 | void *private_data; | |
877211f5 | 400 | void (*private_free)(struct snd_pcm_runtime *runtime); |
1da177e4 LT |
401 | |
402 | /* -- hardware description -- */ | |
877211f5 TI |
403 | struct snd_pcm_hardware hw; |
404 | struct snd_pcm_hw_constraints hw_constraints; | |
1da177e4 LT |
405 | |
406 | /* -- interrupt callbacks -- */ | |
877211f5 TI |
407 | void (*transfer_ack_begin)(struct snd_pcm_substream *substream); |
408 | void (*transfer_ack_end)(struct snd_pcm_substream *substream); | |
1da177e4 LT |
409 | |
410 | /* -- timer -- */ | |
411 | unsigned int timer_resolution; /* timer resolution */ | |
b751eef1 | 412 | int tstamp_type; /* timestamp type */ |
1da177e4 LT |
413 | |
414 | /* -- DMA -- */ | |
415 | unsigned char *dma_area; /* DMA area */ | |
416 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ | |
417 | size_t dma_bytes; /* size of DMA area */ | |
418 | ||
419 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ | |
420 | ||
229d0430 PLB |
421 | /* -- audio timestamp config -- */ |
422 | struct snd_pcm_audio_tstamp_config audio_tstamp_config; | |
423 | struct snd_pcm_audio_tstamp_report audio_tstamp_report; | |
424 | struct timespec driver_tstamp; | |
425 | ||
1da177e4 LT |
426 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
427 | /* -- OSS things -- */ | |
877211f5 | 428 | struct snd_pcm_oss_runtime oss; |
1da177e4 | 429 | #endif |
4d96eb25 JK |
430 | |
431 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG | |
432 | struct snd_pcm_hwptr_log *hwptr_log; | |
433 | #endif | |
1da177e4 LT |
434 | }; |
435 | ||
877211f5 | 436 | struct snd_pcm_group { /* keep linked substreams */ |
1da177e4 | 437 | spinlock_t lock; |
257f8cce | 438 | struct mutex mutex; |
1da177e4 LT |
439 | struct list_head substreams; |
440 | int count; | |
877211f5 | 441 | }; |
1da177e4 | 442 | |
e7373b70 CL |
443 | struct pid; |
444 | ||
877211f5 TI |
445 | struct snd_pcm_substream { |
446 | struct snd_pcm *pcm; | |
447 | struct snd_pcm_str *pstr; | |
1da177e4 LT |
448 | void *private_data; /* copied from pcm->private_data */ |
449 | int number; | |
450 | char name[32]; /* substream name */ | |
451 | int stream; /* stream (direction) */ | |
cc749986 | 452 | struct pm_qos_request latency_pm_qos_req; /* pm_qos request */ |
1da177e4 LT |
453 | size_t buffer_bytes_max; /* limit ring buffer size */ |
454 | struct snd_dma_buffer dma_buffer; | |
1da177e4 LT |
455 | size_t dma_max; |
456 | /* -- hardware operations -- */ | |
e6c2e7eb | 457 | const struct snd_pcm_ops *ops; |
1da177e4 | 458 | /* -- runtime information -- */ |
877211f5 | 459 | struct snd_pcm_runtime *runtime; |
1da177e4 | 460 | /* -- timer section -- */ |
877211f5 | 461 | struct snd_timer *timer; /* timer */ |
1da177e4 | 462 | unsigned timer_running: 1; /* time is running */ |
1da177e4 | 463 | /* -- next substream -- */ |
877211f5 | 464 | struct snd_pcm_substream *next; |
1da177e4 LT |
465 | /* -- linked substreams -- */ |
466 | struct list_head link_list; /* linked list member */ | |
877211f5 TI |
467 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ |
468 | struct snd_pcm_group *group; /* pointer to current group */ | |
1da177e4 | 469 | /* -- assigned files -- */ |
1576274d | 470 | void *file; |
0df63e44 | 471 | int ref_count; |
9c323fcb | 472 | atomic_t mmap_count; |
0df63e44 | 473 | unsigned int f_flags; |
3bf75f9b | 474 | void (*pcm_release)(struct snd_pcm_substream *); |
e7373b70 | 475 | struct pid *pid; |
1da177e4 LT |
476 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
477 | /* -- OSS things -- */ | |
877211f5 | 478 | struct snd_pcm_oss_substream oss; |
1da177e4 | 479 | #endif |
b7d90a35 | 480 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
481 | struct snd_info_entry *proc_root; |
482 | struct snd_info_entry *proc_info_entry; | |
483 | struct snd_info_entry *proc_hw_params_entry; | |
484 | struct snd_info_entry *proc_sw_params_entry; | |
485 | struct snd_info_entry *proc_status_entry; | |
486 | struct snd_info_entry *proc_prealloc_entry; | |
c7132aeb | 487 | struct snd_info_entry *proc_prealloc_max_entry; |
2b30d411 TI |
488 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
489 | struct snd_info_entry *proc_xrun_injection_entry; | |
b7d90a35 | 490 | #endif |
2b30d411 | 491 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 | 492 | /* misc flags */ |
3bf75f9b | 493 | unsigned int hw_opened: 1; |
1da177e4 LT |
494 | }; |
495 | ||
0df63e44 | 496 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
1da177e4 LT |
497 | |
498 | ||
877211f5 | 499 | struct snd_pcm_str { |
1da177e4 | 500 | int stream; /* stream (direction) */ |
877211f5 | 501 | struct snd_pcm *pcm; |
1da177e4 LT |
502 | /* -- substreams -- */ |
503 | unsigned int substream_count; | |
504 | unsigned int substream_opened; | |
877211f5 | 505 | struct snd_pcm_substream *substream; |
1da177e4 LT |
506 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
507 | /* -- OSS things -- */ | |
877211f5 | 508 | struct snd_pcm_oss_stream oss; |
1da177e4 | 509 | #endif |
b7d90a35 | 510 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
511 | struct snd_info_entry *proc_root; |
512 | struct snd_info_entry *proc_info_entry; | |
b7d90a35 | 513 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
1da177e4 | 514 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ |
877211f5 | 515 | struct snd_info_entry *proc_xrun_debug_entry; |
1da177e4 | 516 | #endif |
b7d90a35 | 517 | #endif |
2d3391ec | 518 | struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */ |
ef46c7af | 519 | struct device dev; |
1da177e4 LT |
520 | }; |
521 | ||
877211f5 TI |
522 | struct snd_pcm { |
523 | struct snd_card *card; | |
f87135f5 | 524 | struct list_head list; |
f90c06a2 | 525 | int device; /* device number */ |
1da177e4 LT |
526 | unsigned int info_flags; |
527 | unsigned short dev_class; | |
528 | unsigned short dev_subclass; | |
529 | char id[64]; | |
530 | char name[80]; | |
877211f5 | 531 | struct snd_pcm_str streams[2]; |
1a60d4c5 | 532 | struct mutex open_mutex; |
1da177e4 LT |
533 | wait_queue_head_t open_wait; |
534 | void *private_data; | |
877211f5 | 535 | void (*private_free) (struct snd_pcm *pcm); |
945e5038 | 536 | bool internal; /* pcm is for internal use only */ |
257f8cce | 537 | bool nonatomic; /* whole PCM operations are in non-atomic context */ |
1da177e4 | 538 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 539 | struct snd_pcm_oss oss; |
1da177e4 LT |
540 | #endif |
541 | }; | |
542 | ||
877211f5 TI |
543 | struct snd_pcm_notify { |
544 | int (*n_register) (struct snd_pcm * pcm); | |
545 | int (*n_disconnect) (struct snd_pcm * pcm); | |
546 | int (*n_unregister) (struct snd_pcm * pcm); | |
1da177e4 | 547 | struct list_head list; |
877211f5 | 548 | }; |
1da177e4 LT |
549 | |
550 | /* | |
551 | * Registering | |
552 | */ | |
553 | ||
54047320 | 554 | extern const struct file_operations snd_pcm_f_ops[2]; |
1da177e4 | 555 | |
e6161653 | 556 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
1da177e4 | 557 | int playback_count, int capture_count, |
877211f5 | 558 | struct snd_pcm **rpcm); |
945e5038 LG |
559 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, |
560 | int playback_count, int capture_count, | |
561 | struct snd_pcm **rpcm); | |
877211f5 | 562 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); |
1da177e4 | 563 | |
877211f5 | 564 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
1da177e4 LT |
565 | |
566 | /* | |
567 | * Native I/O | |
568 | */ | |
569 | ||
877211f5 TI |
570 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
571 | int snd_pcm_info_user(struct snd_pcm_substream *substream, | |
572 | struct snd_pcm_info __user *info); | |
573 | int snd_pcm_status(struct snd_pcm_substream *substream, | |
574 | struct snd_pcm_status *status); | |
877211f5 | 575 | int snd_pcm_start(struct snd_pcm_substream *substream); |
fea952e5 | 576 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status); |
877211f5 | 577 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); |
1fb8510c | 578 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream); |
1da177e4 | 579 | #ifdef CONFIG_PM |
877211f5 TI |
580 | int snd_pcm_suspend(struct snd_pcm_substream *substream); |
581 | int snd_pcm_suspend_all(struct snd_pcm *pcm); | |
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 | * | |
612 | * Returns true if the given substream is being linked with others. | |
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); | |
30b771cf TI |
624 | |
625 | /** | |
626 | * snd_pcm_stream_lock_irqsave - Lock the PCM stream | |
627 | * @substream: PCM substream | |
628 | * @flags: irq flags | |
629 | * | |
630 | * This locks the PCM stream like snd_pcm_stream_lock() but with the local | |
631 | * IRQ (only when nonatomic is false). In nonatomic case, this is identical | |
632 | * as snd_pcm_stream_lock(). | |
633 | */ | |
7af142f7 TI |
634 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ |
635 | do { \ | |
636 | typecheck(unsigned long, flags); \ | |
637 | flags = _snd_pcm_stream_lock_irqsave(substream); \ | |
638 | } while (0) | |
639 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, | |
640 | unsigned long flags); | |
1da177e4 | 641 | |
30b771cf TI |
642 | /** |
643 | * snd_pcm_group_for_each_entry - iterate over the linked substreams | |
644 | * @s: the iterator | |
645 | * @substream: the substream | |
646 | * | |
647 | * Iterate over the all linked substreams to the given @substream. | |
648 | * When @substream isn't linked with any others, this gives returns @substream | |
649 | * itself once. | |
650 | */ | |
ef991b95 TI |
651 | #define snd_pcm_group_for_each_entry(s, substream) \ |
652 | list_for_each_entry(s, &substream->group->substreams, link_list) | |
1da177e4 | 653 | |
30b771cf TI |
654 | /** |
655 | * snd_pcm_running - Check whether the substream is in a running state | |
656 | * @substream: substream to check | |
657 | * | |
658 | * Returns true if the given substream is in the state RUNNING, or in the | |
659 | * state DRAINING for playback. | |
660 | */ | |
877211f5 | 661 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
1da177e4 LT |
662 | { |
663 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
664 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
665 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); | |
666 | } | |
667 | ||
30b771cf TI |
668 | /** |
669 | * bytes_to_samples - Unit conversion of the size from bytes to samples | |
670 | * @runtime: PCM runtime instance | |
671 | * @size: size in bytes | |
672 | */ | |
877211f5 | 673 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
674 | { |
675 | return size * 8 / runtime->sample_bits; | |
676 | } | |
677 | ||
30b771cf TI |
678 | /** |
679 | * bytes_to_frames - Unit conversion of the size from bytes to frames | |
680 | * @runtime: PCM runtime instance | |
681 | * @size: size in bytes | |
682 | */ | |
877211f5 | 683 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
684 | { |
685 | return size * 8 / runtime->frame_bits; | |
686 | } | |
687 | ||
30b771cf TI |
688 | /** |
689 | * samples_to_bytes - Unit conversion of the size from samples to bytes | |
690 | * @runtime: PCM runtime instance | |
691 | * @size: size in samples | |
692 | */ | |
877211f5 | 693 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
694 | { |
695 | return size * runtime->sample_bits / 8; | |
696 | } | |
697 | ||
30b771cf TI |
698 | /** |
699 | * frames_to_bytes - Unit conversion of the size from frames to bytes | |
700 | * @runtime: PCM runtime instance | |
701 | * @size: size in frames | |
702 | */ | |
877211f5 | 703 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
1da177e4 LT |
704 | { |
705 | return size * runtime->frame_bits / 8; | |
706 | } | |
707 | ||
30b771cf TI |
708 | /** |
709 | * frame_aligned - Check whether the byte size is aligned to frames | |
710 | * @runtime: PCM runtime instance | |
711 | * @bytes: size in bytes | |
712 | */ | |
877211f5 | 713 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
1da177e4 LT |
714 | { |
715 | return bytes % runtime->byte_align == 0; | |
716 | } | |
717 | ||
30b771cf TI |
718 | /** |
719 | * snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes | |
720 | * @substream: PCM substream | |
721 | */ | |
877211f5 | 722 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 723 | { |
877211f5 | 724 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
725 | return frames_to_bytes(runtime, runtime->buffer_size); |
726 | } | |
727 | ||
30b771cf TI |
728 | /** |
729 | * snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes | |
730 | * @substream: PCM substream | |
731 | */ | |
877211f5 | 732 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 733 | { |
877211f5 | 734 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
735 | return frames_to_bytes(runtime, runtime->period_size); |
736 | } | |
737 | ||
30b771cf TI |
738 | /** |
739 | * snd_pcm_playback_avail - Get the available (writable) space for playback | |
740 | * @runtime: PCM runtime instance | |
741 | * | |
742 | * Result is between 0 ... (boundary - 1) | |
1da177e4 | 743 | */ |
877211f5 | 744 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
745 | { |
746 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; | |
747 | if (avail < 0) | |
748 | avail += runtime->boundary; | |
749 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) | |
750 | avail -= runtime->boundary; | |
751 | return avail; | |
752 | } | |
753 | ||
30b771cf TI |
754 | /** |
755 | * snd_pcm_playback_avail - Get the available (readable) space for capture | |
756 | * @runtime: PCM runtime instance | |
757 | * | |
758 | * Result is between 0 ... (boundary - 1) | |
1da177e4 | 759 | */ |
877211f5 | 760 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
761 | { |
762 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; | |
763 | if (avail < 0) | |
764 | avail += runtime->boundary; | |
765 | return avail; | |
766 | } | |
767 | ||
30b771cf TI |
768 | /** |
769 | * snd_pcm_playback_hw_avail - Get the queued space for playback | |
770 | * @runtime: PCM runtime instance | |
771 | */ | |
877211f5 | 772 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
773 | { |
774 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); | |
775 | } | |
776 | ||
30b771cf TI |
777 | /** |
778 | * snd_pcm_capture_hw_avail - Get the free space for capture | |
779 | * @runtime: PCM runtime instance | |
780 | */ | |
877211f5 | 781 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
782 | { |
783 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); | |
784 | } | |
785 | ||
786 | /** | |
787 | * snd_pcm_playback_ready - check whether the playback buffer is available | |
788 | * @substream: the pcm substream instance | |
789 | * | |
790 | * Checks whether enough free space is available on the playback buffer. | |
791 | * | |
eb7c06e8 | 792 | * Return: Non-zero if available, or zero if not. |
1da177e4 | 793 | */ |
877211f5 | 794 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
1da177e4 | 795 | { |
877211f5 | 796 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
797 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
798 | } | |
799 | ||
800 | /** | |
801 | * snd_pcm_capture_ready - check whether the capture buffer is available | |
802 | * @substream: the pcm substream instance | |
803 | * | |
804 | * Checks whether enough capture data is available on the capture buffer. | |
805 | * | |
eb7c06e8 | 806 | * Return: Non-zero if available, or zero if not. |
1da177e4 | 807 | */ |
877211f5 | 808 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
1da177e4 | 809 | { |
877211f5 | 810 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
811 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
812 | } | |
813 | ||
814 | /** | |
815 | * snd_pcm_playback_data - check whether any data exists on the playback buffer | |
816 | * @substream: the pcm substream instance | |
817 | * | |
eb7c06e8 | 818 | * Checks whether any data exists on the playback buffer. |
1da177e4 | 819 | * |
eb7c06e8 YB |
820 | * Return: Non-zero if any data exists, or zero if not. If stop_threshold |
821 | * is bigger or equal to boundary, then this function returns always non-zero. | |
1da177e4 | 822 | */ |
877211f5 | 823 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
1da177e4 | 824 | { |
877211f5 | 825 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
826 | |
827 | if (runtime->stop_threshold >= runtime->boundary) | |
828 | return 1; | |
829 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; | |
830 | } | |
831 | ||
832 | /** | |
833 | * snd_pcm_playback_empty - check whether the playback buffer is empty | |
834 | * @substream: the pcm substream instance | |
835 | * | |
836 | * Checks whether the playback buffer is empty. | |
837 | * | |
eb7c06e8 | 838 | * Return: Non-zero if empty, or zero if not. |
1da177e4 | 839 | */ |
877211f5 | 840 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
1da177e4 | 841 | { |
877211f5 | 842 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
843 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
844 | } | |
845 | ||
846 | /** | |
847 | * snd_pcm_capture_empty - check whether the capture buffer is empty | |
848 | * @substream: the pcm substream instance | |
849 | * | |
850 | * Checks whether the capture buffer is empty. | |
851 | * | |
eb7c06e8 | 852 | * Return: Non-zero if empty, or zero if not. |
1da177e4 | 853 | */ |
877211f5 | 854 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
1da177e4 | 855 | { |
877211f5 | 856 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
857 | return snd_pcm_capture_avail(runtime) == 0; |
858 | } | |
859 | ||
30b771cf TI |
860 | /** |
861 | * snd_pcm_trigger_done - Mark the master substream | |
862 | * @substream: the pcm substream instance | |
863 | * @master: the linked master substream | |
864 | * | |
865 | * When multiple substreams of the same card are linked and the hardware | |
866 | * supports the single-shot operation, the driver calls this in the loop | |
867 | * in snd_pcm_group_for_each_entry() for marking the substream as "done". | |
868 | * Then most of trigger operations are performed only to the given master | |
869 | * substream. | |
870 | * | |
871 | * The trigger_master mark is cleared at timestamp updates at the end | |
872 | * of trigger operations. | |
873 | */ | |
877211f5 TI |
874 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
875 | struct snd_pcm_substream *master) | |
1da177e4 LT |
876 | { |
877 | substream->runtime->trigger_master = master; | |
878 | } | |
879 | ||
880 | static inline int hw_is_mask(int var) | |
881 | { | |
882 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && | |
883 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; | |
884 | } | |
885 | ||
886 | static inline int hw_is_interval(int var) | |
887 | { | |
888 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && | |
889 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; | |
890 | } | |
891 | ||
877211f5 | 892 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
1da177e4 LT |
893 | snd_pcm_hw_param_t var) |
894 | { | |
895 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
896 | } | |
897 | ||
877211f5 | 898 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
1da177e4 LT |
899 | snd_pcm_hw_param_t var) |
900 | { | |
901 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
902 | } | |
903 | ||
877211f5 | 904 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
905 | snd_pcm_hw_param_t var) |
906 | { | |
b9f09a48 | 907 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
1da177e4 LT |
908 | } |
909 | ||
877211f5 | 910 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
911 | snd_pcm_hw_param_t var) |
912 | { | |
b9f09a48 | 913 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
1da177e4 LT |
914 | } |
915 | ||
85926e0f TI |
916 | /** |
917 | * params_channels - Get the number of channels from the hw params | |
918 | * @p: hw params | |
919 | */ | |
920 | static inline unsigned int params_channels(const struct snd_pcm_hw_params *p) | |
921 | { | |
922 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min; | |
923 | } | |
924 | ||
925 | /** | |
62f64a88 | 926 | * params_rate - Get the sample rate from the hw params |
85926e0f TI |
927 | * @p: hw params |
928 | */ | |
929 | static inline unsigned int params_rate(const struct snd_pcm_hw_params *p) | |
930 | { | |
931 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min; | |
932 | } | |
933 | ||
934 | /** | |
62f64a88 | 935 | * params_period_size - Get the period size (in frames) from the hw params |
85926e0f TI |
936 | * @p: hw params |
937 | */ | |
938 | static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p) | |
939 | { | |
940 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min; | |
941 | } | |
942 | ||
943 | /** | |
62f64a88 | 944 | * params_periods - Get the number of periods from the hw params |
85926e0f TI |
945 | * @p: hw params |
946 | */ | |
947 | static inline unsigned int params_periods(const struct snd_pcm_hw_params *p) | |
948 | { | |
949 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min; | |
950 | } | |
951 | ||
952 | /** | |
62f64a88 | 953 | * params_buffer_size - Get the buffer size (in frames) from the hw params |
85926e0f TI |
954 | * @p: hw params |
955 | */ | |
956 | static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p) | |
957 | { | |
958 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min; | |
959 | } | |
960 | ||
961 | /** | |
62f64a88 | 962 | * params_buffer_bytes - Get the buffer size (in bytes) from the hw params |
85926e0f TI |
963 | * @p: hw params |
964 | */ | |
965 | static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p) | |
966 | { | |
967 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min; | |
968 | } | |
1da177e4 | 969 | |
877211f5 TI |
970 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
971 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
972 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
973 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, | |
974 | unsigned int k, struct snd_interval *c); | |
975 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, | |
976 | const struct snd_interval *b, struct snd_interval *c); | |
4af87a93 MB |
977 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
978 | const unsigned int *list, unsigned int mask); | |
f66f898e PR |
979 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, |
980 | const struct snd_interval *list, unsigned int mask); | |
877211f5 TI |
981 | int snd_interval_ratnum(struct snd_interval *i, |
982 | unsigned int rats_count, struct snd_ratnum *rats, | |
1da177e4 LT |
983 | unsigned int *nump, unsigned int *denp); |
984 | ||
877211f5 TI |
985 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
986 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); | |
877211f5 | 987 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 988 | |
877211f5 | 989 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 990 | |
877211f5 TI |
991 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
992 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); | |
1da177e4 | 993 | |
877211f5 | 994 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 995 | u_int32_t mask); |
877211f5 | 996 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 997 | u_int64_t mask); |
877211f5 | 998 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 999 | unsigned int min, unsigned int max); |
877211f5 TI |
1000 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
1001 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
1002 | unsigned int cond, |
1003 | snd_pcm_hw_param_t var, | |
1464189f | 1004 | const struct snd_pcm_hw_constraint_list *l); |
f66f898e PR |
1005 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, |
1006 | unsigned int cond, | |
1007 | snd_pcm_hw_param_t var, | |
1008 | const struct snd_pcm_hw_constraint_ranges *r); | |
877211f5 | 1009 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1010 | unsigned int cond, |
1011 | snd_pcm_hw_param_t var, | |
877211f5 TI |
1012 | struct snd_pcm_hw_constraint_ratnums *r); |
1013 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
1014 | unsigned int cond, |
1015 | snd_pcm_hw_param_t var, | |
877211f5 TI |
1016 | struct snd_pcm_hw_constraint_ratdens *r); |
1017 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
1018 | unsigned int cond, |
1019 | unsigned int width, | |
1020 | unsigned int msbits); | |
877211f5 | 1021 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1022 | unsigned int cond, |
1023 | snd_pcm_hw_param_t var, | |
1024 | unsigned long step); | |
877211f5 | 1025 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1026 | unsigned int cond, |
1027 | snd_pcm_hw_param_t var); | |
d5b702a6 CL |
1028 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, |
1029 | unsigned int base_rate); | |
877211f5 | 1030 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1031 | unsigned int cond, |
1032 | int var, | |
1033 | snd_pcm_hw_rule_func_t func, void *private, | |
1034 | int dep, ...); | |
1035 | ||
1036 | int snd_pcm_format_signed(snd_pcm_format_t format); | |
1037 | int snd_pcm_format_unsigned(snd_pcm_format_t format); | |
1038 | int snd_pcm_format_linear(snd_pcm_format_t format); | |
1039 | int snd_pcm_format_little_endian(snd_pcm_format_t format); | |
1040 | int snd_pcm_format_big_endian(snd_pcm_format_t format); | |
1b44c28d TI |
1041 | #if 0 /* just for DocBook */ |
1042 | /** | |
9502dcad TI |
1043 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
1044 | * @format: the format to check | |
1045 | * | |
eb7c06e8 | 1046 | * Return: 1 if the given PCM format is CPU-endian, 0 if |
9502dcad TI |
1047 | * opposite, or a negative error code if endian not specified. |
1048 | */ | |
8cdfd251 | 1049 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
1b44c28d | 1050 | #endif /* DocBook */ |
9502dcad | 1051 | #ifdef SNDRV_LITTLE_ENDIAN |
9d01a82e | 1052 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
9502dcad | 1053 | #else |
9d01a82e | 1054 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
9502dcad | 1055 | #endif |
1da177e4 LT |
1056 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
1057 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ | |
9502dcad | 1058 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
1da177e4 LT |
1059 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
1060 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); | |
1da177e4 | 1061 | |
e6c2e7eb LPC |
1062 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, |
1063 | const struct snd_pcm_ops *ops); | |
877211f5 | 1064 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); |
877211f5 | 1065 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 | 1066 | unsigned int cmd, void *arg); |
1250932e JK |
1067 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
1068 | struct snd_pcm_runtime *runtime); | |
877211f5 | 1069 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
877211f5 | 1070 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); |
877211f5 TI |
1071 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); |
1072 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, | |
1da177e4 LT |
1073 | const void __user *buf, |
1074 | snd_pcm_uframes_t frames); | |
877211f5 | 1075 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
1da177e4 | 1076 | void __user *buf, snd_pcm_uframes_t frames); |
877211f5 | 1077 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 | 1078 | void __user **bufs, snd_pcm_uframes_t frames); |
877211f5 | 1079 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
1080 | void __user **bufs, snd_pcm_uframes_t frames); |
1081 | ||
7653d557 CL |
1082 | extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; |
1083 | ||
877211f5 | 1084 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
918f3a0e | 1085 | unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); |
4be77a53 | 1086 | unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); |
e3a9269f LPC |
1087 | unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a, |
1088 | unsigned int rates_b); | |
1da177e4 | 1089 | |
30b771cf TI |
1090 | /** |
1091 | * snd_pcm_set_runtime_buffer - Set the PCM runtime buffer | |
1092 | * @substream: PCM substream to set | |
1093 | * @bufp: the buffer information, NULL to clear | |
1094 | * | |
1095 | * Copy the buffer information to runtime->dma_buffer when @bufp is non-NULL. | |
1096 | * Otherwise it clears the current buffer information. | |
1097 | */ | |
877211f5 | 1098 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1099 | struct snd_dma_buffer *bufp) |
1100 | { | |
877211f5 | 1101 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1102 | if (bufp) { |
1103 | runtime->dma_buffer_p = bufp; | |
1104 | runtime->dma_area = bufp->area; | |
1105 | runtime->dma_addr = bufp->addr; | |
1106 | runtime->dma_bytes = bufp->bytes; | |
1107 | } else { | |
1108 | runtime->dma_buffer_p = NULL; | |
1109 | runtime->dma_area = NULL; | |
1110 | runtime->dma_addr = 0; | |
1111 | runtime->dma_bytes = 0; | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * Timer interface | |
1117 | */ | |
1118 | ||
877211f5 TI |
1119 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
1120 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); | |
1121 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); | |
1da177e4 | 1122 | |
30b771cf TI |
1123 | /** |
1124 | * snd_pcm_gettime - Fill the timespec depending on the timestamp mode | |
1125 | * @runtime: PCM runtime instance | |
1126 | * @tv: timespec to fill | |
1127 | */ | |
b751eef1 JK |
1128 | static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, |
1129 | struct timespec *tv) | |
1130 | { | |
0ac8a52d MB |
1131 | switch (runtime->tstamp_type) { |
1132 | case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC: | |
26204e04 | 1133 | ktime_get_ts(tv); |
0ac8a52d MB |
1134 | break; |
1135 | case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW: | |
1136 | getrawmonotonic(tv); | |
1137 | break; | |
1138 | default: | |
b751eef1 | 1139 | getnstimeofday(tv); |
0ac8a52d MB |
1140 | break; |
1141 | } | |
b751eef1 JK |
1142 | } |
1143 | ||
1da177e4 LT |
1144 | /* |
1145 | * Memory | |
1146 | */ | |
1147 | ||
877211f5 TI |
1148 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
1149 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); | |
1150 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, | |
1da177e4 LT |
1151 | int type, struct device *data, |
1152 | size_t size, size_t max); | |
877211f5 | 1153 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
1da177e4 LT |
1154 | int type, void *data, |
1155 | size_t size, size_t max); | |
877211f5 TI |
1156 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
1157 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); | |
1da177e4 | 1158 | |
681b84e1 CL |
1159 | int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, |
1160 | size_t size, gfp_t gfp_flags); | |
1161 | int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); | |
1162 | struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, | |
1163 | unsigned long offset); | |
681b84e1 CL |
1164 | /** |
1165 | * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer | |
1166 | * @substream: the substream to allocate the buffer to | |
1167 | * @size: the requested buffer size, in bytes | |
1168 | * | |
1169 | * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is | |
1170 | * contiguous in kernel virtual space, but not in physical memory. Use this | |
1171 | * if the buffer is accessed by kernel code but not by device DMA. | |
1172 | * | |
eb7c06e8 | 1173 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error |
681b84e1 CL |
1174 | * code. |
1175 | */ | |
f213d8f7 TI |
1176 | static inline int snd_pcm_lib_alloc_vmalloc_buffer |
1177 | (struct snd_pcm_substream *substream, size_t size) | |
1178 | { | |
1179 | return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, | |
1180 | GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO); | |
1181 | } | |
1182 | ||
681b84e1 CL |
1183 | /** |
1184 | * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer | |
1185 | * @substream: the substream to allocate the buffer to | |
1186 | * @size: the requested buffer size, in bytes | |
1187 | * | |
1188 | * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses | |
1189 | * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. | |
eb7c06e8 YB |
1190 | * |
1191 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error | |
1192 | * code. | |
681b84e1 | 1193 | */ |
f213d8f7 TI |
1194 | static inline int snd_pcm_lib_alloc_vmalloc_32_buffer |
1195 | (struct snd_pcm_substream *substream, size_t size) | |
1196 | { | |
1197 | return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, | |
1198 | GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); | |
1199 | } | |
681b84e1 | 1200 | |
9d069dc0 TI |
1201 | #define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p) |
1202 | ||
cc6a8acd | 1203 | #ifdef CONFIG_SND_DMA_SGBUF |
77a23f26 TI |
1204 | /* |
1205 | * SG-buffer handling | |
1206 | */ | |
1207 | #define snd_pcm_substream_sgbuf(substream) \ | |
9d069dc0 | 1208 | snd_pcm_get_dma_buf(substream)->private_data |
77a23f26 TI |
1209 | |
1210 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, | |
1211 | unsigned long offset); | |
cc6a8acd TI |
1212 | #else /* !SND_DMA_SGBUF */ |
1213 | /* | |
1214 | * fake using a continuous buffer | |
1215 | */ | |
9d069dc0 TI |
1216 | #define snd_pcm_sgbuf_ops_page NULL |
1217 | #endif /* SND_DMA_SGBUF */ | |
1218 | ||
30b771cf TI |
1219 | /** |
1220 | * snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset | |
1221 | * @substream: PCM substream | |
1222 | * @ofs: byte offset | |
1223 | */ | |
cc6a8acd TI |
1224 | static inline dma_addr_t |
1225 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) | |
1226 | { | |
9d069dc0 | 1227 | return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs); |
cc6a8acd TI |
1228 | } |
1229 | ||
30b771cf TI |
1230 | /** |
1231 | * snd_pcm_sgbuf_get_ptr - Get the virtual address at the corresponding offset | |
1232 | * @substream: PCM substream | |
1233 | * @ofs: byte offset | |
1234 | */ | |
cc6a8acd TI |
1235 | static inline void * |
1236 | snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) | |
1237 | { | |
9d069dc0 | 1238 | return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs); |
cc6a8acd TI |
1239 | } |
1240 | ||
30b771cf TI |
1241 | /** |
1242 | * snd_pcm_sgbuf_chunk_size - Compute the max size that fits within the contig. | |
1243 | * page from the given size | |
1244 | * @substream: PCM substream | |
1245 | * @ofs: byte offset | |
1246 | * @size: byte size to examine | |
1247 | */ | |
9d069dc0 TI |
1248 | static inline unsigned int |
1249 | snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, | |
1250 | unsigned int ofs, unsigned int size) | |
1251 | { | |
1252 | return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size); | |
1253 | } | |
cc6a8acd | 1254 | |
30b771cf TI |
1255 | /** |
1256 | * snd_pcm_mmap_data_open - increase the mmap counter | |
1257 | * @area: VMA | |
1258 | * | |
1259 | * PCM mmap callback should handle this counter properly | |
1260 | */ | |
1da177e4 LT |
1261 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) |
1262 | { | |
877211f5 | 1263 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 1264 | atomic_inc(&substream->mmap_count); |
1da177e4 LT |
1265 | } |
1266 | ||
30b771cf TI |
1267 | /** |
1268 | * snd_pcm_mmap_data_close - decrease the mmap counter | |
1269 | * @area: VMA | |
1270 | * | |
1271 | * PCM mmap callback should handle this counter properly | |
1272 | */ | |
1da177e4 LT |
1273 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) |
1274 | { | |
877211f5 | 1275 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 1276 | atomic_dec(&substream->mmap_count); |
1da177e4 LT |
1277 | } |
1278 | ||
18a2b962 TI |
1279 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
1280 | struct vm_area_struct *area); | |
1da177e4 LT |
1281 | /* mmap for io-memory area */ |
1282 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
1283 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP | |
877211f5 | 1284 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
1da177e4 LT |
1285 | #else |
1286 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 | |
1287 | #define snd_pcm_lib_mmap_iomem NULL | |
1288 | #endif | |
1289 | ||
3674f19d | 1290 | #define snd_pcm_lib_mmap_vmalloc NULL |
c32d977b | 1291 | |
30b771cf TI |
1292 | /** |
1293 | * snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer | |
1294 | * @dma: DMA number | |
1295 | * @max: pointer to store the max size | |
1296 | */ | |
1da177e4 LT |
1297 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) |
1298 | { | |
1299 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; | |
1300 | } | |
1301 | ||
1302 | /* | |
1303 | * Misc | |
1304 | */ | |
1305 | ||
1306 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ | |
1307 | (IEC958_AES1_CON_ORIGINAL<<8)|\ | |
1308 | (IEC958_AES1_CON_PCM_CODER<<8)|\ | |
1309 | (IEC958_AES3_CON_FS_48000<<24)) | |
1310 | ||
7eaa943c TI |
1311 | #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) |
1312 | ||
6e5265ec TI |
1313 | const char *snd_pcm_format_name(snd_pcm_format_t format); |
1314 | ||
1aad779f | 1315 | /** |
8513915a RD |
1316 | * snd_pcm_stream_str - Get a string naming the direction of a stream |
1317 | * @substream: the pcm substream instance | |
eb7c06e8 YB |
1318 | * |
1319 | * Return: A string naming the direction of the stream. | |
1aad779f OL |
1320 | */ |
1321 | static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream) | |
1322 | { | |
1323 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
1324 | return "Playback"; | |
1325 | else | |
1326 | return "Capture"; | |
1327 | } | |
1328 | ||
2d3391ec TI |
1329 | /* |
1330 | * PCM channel-mapping control API | |
1331 | */ | |
1332 | /* array element of channel maps */ | |
1333 | struct snd_pcm_chmap_elem { | |
1334 | unsigned char channels; | |
1335 | unsigned char map[15]; | |
1336 | }; | |
1337 | ||
1338 | /* channel map information; retrieved via snd_kcontrol_chip() */ | |
1339 | struct snd_pcm_chmap { | |
1340 | struct snd_pcm *pcm; /* assigned PCM instance */ | |
1341 | int stream; /* PLAYBACK or CAPTURE */ | |
1342 | struct snd_kcontrol *kctl; | |
1343 | const struct snd_pcm_chmap_elem *chmap; | |
1344 | unsigned int max_channels; | |
1345 | unsigned int channel_mask; /* optional: active channels bitmask */ | |
1346 | void *private_data; /* optional: private data pointer */ | |
1347 | }; | |
1348 | ||
30b771cf TI |
1349 | /** |
1350 | * snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info | |
1351 | * @info: chmap information | |
1352 | * @idx: the substream number index | |
1353 | */ | |
2d3391ec TI |
1354 | static inline struct snd_pcm_substream * |
1355 | snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) | |
1356 | { | |
1357 | struct snd_pcm_substream *s; | |
1358 | for (s = info->pcm->streams[info->stream].substream; s; s = s->next) | |
1359 | if (s->number == idx) | |
1360 | return s; | |
1361 | return NULL; | |
1362 | } | |
1363 | ||
1364 | /* ALSA-standard channel maps (RL/RR prior to C/LFE) */ | |
1365 | extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[]; | |
1366 | /* Other world's standard channel maps (C/LFE prior to RL/RR) */ | |
1367 | extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[]; | |
1368 | ||
1369 | /* bit masks to be passed to snd_pcm_chmap.channel_mask field */ | |
1370 | #define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4)) | |
1371 | #define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6)) | |
1372 | #define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8)) | |
1373 | ||
1374 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
1375 | const struct snd_pcm_chmap_elem *chmap, | |
1376 | int max_channels, | |
1377 | unsigned long private_value, | |
1378 | struct snd_pcm_chmap **info_ret); | |
1379 | ||
30b771cf TI |
1380 | /** |
1381 | * pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise | |
1382 | * @pcm_format: PCM format | |
1383 | */ | |
74c34ca1 EZ |
1384 | static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) |
1385 | { | |
1386 | return 1ULL << (__force int) pcm_format; | |
1387 | } | |
1388 | ||
09e56df8 TI |
1389 | /* printk helpers */ |
1390 | #define pcm_err(pcm, fmt, args...) \ | |
1391 | dev_err((pcm)->card->dev, fmt, ##args) | |
1392 | #define pcm_warn(pcm, fmt, args...) \ | |
1393 | dev_warn((pcm)->card->dev, fmt, ##args) | |
1394 | #define pcm_dbg(pcm, fmt, args...) \ | |
1395 | dev_dbg((pcm)->card->dev, fmt, ##args) | |
1396 | ||
1da177e4 | 1397 | #endif /* __SOUND_PCM_H */ |