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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 | 226 | unsigned int cond; |
1da177e4 LT |
227 | int var; |
228 | int deps[4]; | |
d16efa06 LPC |
229 | |
230 | snd_pcm_hw_rule_func_t func; | |
1da177e4 LT |
231 | void *private; |
232 | }; | |
233 | ||
877211f5 TI |
234 | struct snd_pcm_hw_constraints { |
235 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - | |
1da177e4 | 236 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
877211f5 | 237 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
1da177e4 LT |
238 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
239 | unsigned int rules_num; | |
240 | unsigned int rules_all; | |
877211f5 TI |
241 | struct snd_pcm_hw_rule *rules; |
242 | }; | |
1da177e4 | 243 | |
877211f5 TI |
244 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
245 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
246 | { |
247 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
248 | } | |
249 | ||
877211f5 TI |
250 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
251 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
252 | { |
253 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
254 | } | |
255 | ||
877211f5 | 256 | struct snd_ratnum { |
1da177e4 LT |
257 | unsigned int num; |
258 | unsigned int den_min, den_max, den_step; | |
877211f5 | 259 | }; |
1da177e4 | 260 | |
877211f5 | 261 | struct snd_ratden { |
1da177e4 LT |
262 | unsigned int num_min, num_max, num_step; |
263 | unsigned int den; | |
877211f5 | 264 | }; |
1da177e4 | 265 | |
877211f5 | 266 | struct snd_pcm_hw_constraint_ratnums { |
1da177e4 | 267 | int nrats; |
877211f5 TI |
268 | struct snd_ratnum *rats; |
269 | }; | |
1da177e4 | 270 | |
877211f5 | 271 | struct snd_pcm_hw_constraint_ratdens { |
1da177e4 | 272 | int nrats; |
877211f5 TI |
273 | struct snd_ratden *rats; |
274 | }; | |
1da177e4 | 275 | |
877211f5 | 276 | struct snd_pcm_hw_constraint_list { |
4af87a93 | 277 | const unsigned int *list; |
782e50e0 | 278 | unsigned int count; |
1da177e4 | 279 | unsigned int mask; |
877211f5 | 280 | }; |
1da177e4 | 281 | |
f66f898e PR |
282 | struct snd_pcm_hw_constraint_ranges { |
283 | unsigned int count; | |
284 | const struct snd_interval *ranges; | |
285 | unsigned int mask; | |
286 | }; | |
287 | ||
4d96eb25 JK |
288 | struct snd_pcm_hwptr_log; |
289 | ||
229d0430 PLB |
290 | /* |
291 | * userspace-provided audio timestamp config to kernel, | |
292 | * structure is for internal use only and filled with dedicated unpack routine | |
293 | */ | |
294 | struct snd_pcm_audio_tstamp_config { | |
295 | /* 5 of max 16 bits used */ | |
296 | u32 type_requested:4; | |
297 | u32 report_delay:1; /* add total delay to A/D or D/A */ | |
298 | }; | |
299 | ||
300 | static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data, | |
301 | struct snd_pcm_audio_tstamp_config *config) | |
302 | { | |
303 | config->type_requested = data & 0xF; | |
304 | config->report_delay = (data >> 4) & 1; | |
305 | } | |
306 | ||
307 | /* | |
308 | * kernel-provided audio timestamp report to user-space | |
309 | * structure is for internal use only and read by dedicated pack routine | |
310 | */ | |
311 | struct snd_pcm_audio_tstamp_report { | |
312 | /* 6 of max 16 bits used for bit-fields */ | |
313 | ||
314 | /* for backwards compatibility */ | |
315 | u32 valid:1; | |
316 | ||
317 | /* actual type if hardware could not support requested timestamp */ | |
318 | u32 actual_type:4; | |
319 | ||
320 | /* accuracy represented in ns units */ | |
321 | u32 accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */ | |
322 | u32 accuracy; /* up to 4.29s, will be packed in separate field */ | |
323 | }; | |
324 | ||
325 | static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy, | |
326 | const struct snd_pcm_audio_tstamp_report *report) | |
327 | { | |
328 | u32 tmp; | |
329 | ||
330 | tmp = report->accuracy_report; | |
331 | tmp <<= 4; | |
332 | tmp |= report->actual_type; | |
333 | tmp <<= 1; | |
334 | tmp |= report->valid; | |
335 | ||
336 | *data &= 0xffff; /* zero-clear MSBs */ | |
337 | *data |= (tmp << 16); | |
338 | *accuracy = report->accuracy; | |
339 | } | |
340 | ||
341 | ||
877211f5 | 342 | struct snd_pcm_runtime { |
1da177e4 | 343 | /* -- Status -- */ |
877211f5 | 344 | struct snd_pcm_substream *trigger_master; |
07799e75 | 345 | struct timespec trigger_tstamp; /* trigger timestamp */ |
2b79d7a6 | 346 | bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */ |
1da177e4 LT |
347 | int overrange; |
348 | snd_pcm_uframes_t avail_max; | |
349 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ | |
e7636925 | 350 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ |
bbf6ad13 | 351 | unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ |
bd76af0f | 352 | unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ |
4bbe1ddf | 353 | snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ |
0e8014d7 | 354 | u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */ |
1da177e4 LT |
355 | |
356 | /* -- HW params -- */ | |
357 | snd_pcm_access_t access; /* access mode */ | |
358 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ | |
359 | snd_pcm_subformat_t subformat; /* subformat */ | |
360 | unsigned int rate; /* rate in Hz */ | |
361 | unsigned int channels; /* channels */ | |
362 | snd_pcm_uframes_t period_size; /* period size */ | |
363 | unsigned int periods; /* periods */ | |
364 | snd_pcm_uframes_t buffer_size; /* buffer size */ | |
1da177e4 LT |
365 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ |
366 | size_t byte_align; | |
367 | unsigned int frame_bits; | |
368 | unsigned int sample_bits; | |
369 | unsigned int info; | |
370 | unsigned int rate_num; | |
371 | unsigned int rate_den; | |
ab69a490 | 372 | unsigned int no_period_wakeup: 1; |
1da177e4 LT |
373 | |
374 | /* -- SW params -- */ | |
877211f5 | 375 | int tstamp_mode; /* mmap timestamp is updated */ |
1da177e4 | 376 | unsigned int period_step; |
1da177e4 LT |
377 | snd_pcm_uframes_t start_threshold; |
378 | snd_pcm_uframes_t stop_threshold; | |
379 | snd_pcm_uframes_t silence_threshold; /* Silence filling happens when | |
380 | noise is nearest than this */ | |
381 | snd_pcm_uframes_t silence_size; /* Silence filling size */ | |
382 | snd_pcm_uframes_t boundary; /* pointers wrap point */ | |
383 | ||
384 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ | |
385 | snd_pcm_uframes_t silence_filled; /* size filled with silence */ | |
386 | ||
877211f5 | 387 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ |
1da177e4 LT |
388 | |
389 | /* -- mmap -- */ | |
503fc85a TI |
390 | struct snd_pcm_mmap_status *status; |
391 | struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
392 | |
393 | /* -- locking / scheduling -- */ | |
5daeba34 | 394 | snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ |
c91a988d JK |
395 | wait_queue_head_t sleep; /* poll sleep */ |
396 | wait_queue_head_t tsleep; /* transfer sleep */ | |
1da177e4 LT |
397 | struct fasync_struct *fasync; |
398 | ||
399 | /* -- private section -- */ | |
400 | void *private_data; | |
877211f5 | 401 | void (*private_free)(struct snd_pcm_runtime *runtime); |
1da177e4 LT |
402 | |
403 | /* -- hardware description -- */ | |
877211f5 TI |
404 | struct snd_pcm_hardware hw; |
405 | struct snd_pcm_hw_constraints hw_constraints; | |
1da177e4 LT |
406 | |
407 | /* -- interrupt callbacks -- */ | |
877211f5 TI |
408 | void (*transfer_ack_begin)(struct snd_pcm_substream *substream); |
409 | void (*transfer_ack_end)(struct snd_pcm_substream *substream); | |
1da177e4 LT |
410 | |
411 | /* -- timer -- */ | |
412 | unsigned int timer_resolution; /* timer resolution */ | |
b751eef1 | 413 | int tstamp_type; /* timestamp type */ |
1da177e4 LT |
414 | |
415 | /* -- DMA -- */ | |
416 | unsigned char *dma_area; /* DMA area */ | |
417 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ | |
418 | size_t dma_bytes; /* size of DMA area */ | |
419 | ||
420 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ | |
421 | ||
229d0430 PLB |
422 | /* -- audio timestamp config -- */ |
423 | struct snd_pcm_audio_tstamp_config audio_tstamp_config; | |
424 | struct snd_pcm_audio_tstamp_report audio_tstamp_report; | |
425 | struct timespec driver_tstamp; | |
426 | ||
1da177e4 LT |
427 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
428 | /* -- OSS things -- */ | |
877211f5 | 429 | struct snd_pcm_oss_runtime oss; |
1da177e4 | 430 | #endif |
4d96eb25 JK |
431 | |
432 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG | |
433 | struct snd_pcm_hwptr_log *hwptr_log; | |
434 | #endif | |
1da177e4 LT |
435 | }; |
436 | ||
877211f5 | 437 | struct snd_pcm_group { /* keep linked substreams */ |
1da177e4 | 438 | spinlock_t lock; |
257f8cce | 439 | struct mutex mutex; |
1da177e4 LT |
440 | struct list_head substreams; |
441 | int count; | |
877211f5 | 442 | }; |
1da177e4 | 443 | |
e7373b70 CL |
444 | struct pid; |
445 | ||
877211f5 TI |
446 | struct snd_pcm_substream { |
447 | struct snd_pcm *pcm; | |
448 | struct snd_pcm_str *pstr; | |
1da177e4 LT |
449 | void *private_data; /* copied from pcm->private_data */ |
450 | int number; | |
451 | char name[32]; /* substream name */ | |
452 | int stream; /* stream (direction) */ | |
cc749986 | 453 | struct pm_qos_request latency_pm_qos_req; /* pm_qos request */ |
1da177e4 LT |
454 | size_t buffer_bytes_max; /* limit ring buffer size */ |
455 | struct snd_dma_buffer dma_buffer; | |
1da177e4 LT |
456 | size_t dma_max; |
457 | /* -- hardware operations -- */ | |
e6c2e7eb | 458 | const struct snd_pcm_ops *ops; |
1da177e4 | 459 | /* -- runtime information -- */ |
877211f5 | 460 | struct snd_pcm_runtime *runtime; |
1da177e4 | 461 | /* -- timer section -- */ |
877211f5 | 462 | struct snd_timer *timer; /* timer */ |
1da177e4 | 463 | unsigned timer_running: 1; /* time is running */ |
1da177e4 | 464 | /* -- next substream -- */ |
877211f5 | 465 | struct snd_pcm_substream *next; |
1da177e4 LT |
466 | /* -- linked substreams -- */ |
467 | struct list_head link_list; /* linked list member */ | |
877211f5 TI |
468 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ |
469 | struct snd_pcm_group *group; /* pointer to current group */ | |
1da177e4 | 470 | /* -- assigned files -- */ |
1576274d | 471 | void *file; |
0df63e44 | 472 | int ref_count; |
9c323fcb | 473 | atomic_t mmap_count; |
0df63e44 | 474 | unsigned int f_flags; |
3bf75f9b | 475 | void (*pcm_release)(struct snd_pcm_substream *); |
e7373b70 | 476 | struct pid *pid; |
1da177e4 LT |
477 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
478 | /* -- OSS things -- */ | |
877211f5 | 479 | struct snd_pcm_oss_substream oss; |
1da177e4 | 480 | #endif |
b7d90a35 | 481 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
482 | struct snd_info_entry *proc_root; |
483 | struct snd_info_entry *proc_info_entry; | |
484 | struct snd_info_entry *proc_hw_params_entry; | |
485 | struct snd_info_entry *proc_sw_params_entry; | |
486 | struct snd_info_entry *proc_status_entry; | |
487 | struct snd_info_entry *proc_prealloc_entry; | |
c7132aeb | 488 | struct snd_info_entry *proc_prealloc_max_entry; |
2b30d411 TI |
489 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
490 | struct snd_info_entry *proc_xrun_injection_entry; | |
b7d90a35 | 491 | #endif |
2b30d411 | 492 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 | 493 | /* misc flags */ |
3bf75f9b | 494 | unsigned int hw_opened: 1; |
1da177e4 LT |
495 | }; |
496 | ||
0df63e44 | 497 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
1da177e4 LT |
498 | |
499 | ||
877211f5 | 500 | struct snd_pcm_str { |
1da177e4 | 501 | int stream; /* stream (direction) */ |
877211f5 | 502 | struct snd_pcm *pcm; |
1da177e4 LT |
503 | /* -- substreams -- */ |
504 | unsigned int substream_count; | |
505 | unsigned int substream_opened; | |
877211f5 | 506 | struct snd_pcm_substream *substream; |
1da177e4 LT |
507 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
508 | /* -- OSS things -- */ | |
877211f5 | 509 | struct snd_pcm_oss_stream oss; |
1da177e4 | 510 | #endif |
b7d90a35 | 511 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
512 | struct snd_info_entry *proc_root; |
513 | struct snd_info_entry *proc_info_entry; | |
b7d90a35 | 514 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
1da177e4 | 515 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ |
877211f5 | 516 | struct snd_info_entry *proc_xrun_debug_entry; |
1da177e4 | 517 | #endif |
b7d90a35 | 518 | #endif |
2d3391ec | 519 | struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */ |
ef46c7af | 520 | struct device dev; |
1da177e4 LT |
521 | }; |
522 | ||
877211f5 TI |
523 | struct snd_pcm { |
524 | struct snd_card *card; | |
f87135f5 | 525 | struct list_head list; |
f90c06a2 | 526 | int device; /* device number */ |
1da177e4 LT |
527 | unsigned int info_flags; |
528 | unsigned short dev_class; | |
529 | unsigned short dev_subclass; | |
530 | char id[64]; | |
531 | char name[80]; | |
877211f5 | 532 | struct snd_pcm_str streams[2]; |
1a60d4c5 | 533 | struct mutex open_mutex; |
1da177e4 LT |
534 | wait_queue_head_t open_wait; |
535 | void *private_data; | |
877211f5 | 536 | void (*private_free) (struct snd_pcm *pcm); |
945e5038 | 537 | bool internal; /* pcm is for internal use only */ |
257f8cce | 538 | bool nonatomic; /* whole PCM operations are in non-atomic context */ |
1da177e4 | 539 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 540 | struct snd_pcm_oss oss; |
1da177e4 LT |
541 | #endif |
542 | }; | |
543 | ||
877211f5 TI |
544 | struct snd_pcm_notify { |
545 | int (*n_register) (struct snd_pcm * pcm); | |
546 | int (*n_disconnect) (struct snd_pcm * pcm); | |
547 | int (*n_unregister) (struct snd_pcm * pcm); | |
1da177e4 | 548 | struct list_head list; |
877211f5 | 549 | }; |
1da177e4 LT |
550 | |
551 | /* | |
552 | * Registering | |
553 | */ | |
554 | ||
54047320 | 555 | extern const struct file_operations snd_pcm_f_ops[2]; |
1da177e4 | 556 | |
e6161653 | 557 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
1da177e4 | 558 | int playback_count, int capture_count, |
877211f5 | 559 | struct snd_pcm **rpcm); |
945e5038 LG |
560 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, |
561 | int playback_count, int capture_count, | |
562 | struct snd_pcm **rpcm); | |
877211f5 | 563 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); |
1da177e4 | 564 | |
877211f5 | 565 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
1da177e4 LT |
566 | |
567 | /* | |
568 | * Native I/O | |
569 | */ | |
570 | ||
877211f5 TI |
571 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
572 | int snd_pcm_info_user(struct snd_pcm_substream *substream, | |
573 | struct snd_pcm_info __user *info); | |
574 | int snd_pcm_status(struct snd_pcm_substream *substream, | |
575 | struct snd_pcm_status *status); | |
877211f5 | 576 | int snd_pcm_start(struct snd_pcm_substream *substream); |
fea952e5 | 577 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status); |
877211f5 | 578 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); |
1fb8510c | 579 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream); |
1da177e4 | 580 | #ifdef CONFIG_PM |
877211f5 TI |
581 | int snd_pcm_suspend(struct snd_pcm_substream *substream); |
582 | int snd_pcm_suspend_all(struct snd_pcm *pcm); | |
1da177e4 | 583 | #endif |
877211f5 | 584 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); |
3bf75f9b TI |
585 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, |
586 | struct snd_pcm_substream **rsubstream); | |
877211f5 | 587 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); |
3bf75f9b TI |
588 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, |
589 | struct snd_pcm_substream **rsubstream); | |
590 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); | |
877211f5 | 591 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); |
1da177e4 | 592 | |
acb03d44 EB |
593 | |
594 | #ifdef CONFIG_SND_DEBUG | |
595 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
596 | char *name, size_t len); | |
597 | #else | |
598 | static inline void | |
599 | snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size) | |
600 | { | |
601 | *buf = 0; | |
602 | } | |
603 | #endif | |
604 | ||
1da177e4 LT |
605 | /* |
606 | * PCM library | |
607 | */ | |
608 | ||
30b771cf TI |
609 | /** |
610 | * snd_pcm_stream_linked - Check whether the substream is linked with others | |
611 | * @substream: substream to check | |
612 | * | |
613 | * Returns true if the given substream is being linked with others. | |
614 | */ | |
877211f5 | 615 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) |
1da177e4 LT |
616 | { |
617 | return substream->group != &substream->self_group; | |
618 | } | |
619 | ||
7af142f7 TI |
620 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream); |
621 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream); | |
622 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream); | |
623 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream); | |
624 | unsigned long _snd_pcm_stream_lock_irqsave(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 | |
30b771cf TI |
643 | /** |
644 | * snd_pcm_group_for_each_entry - iterate over the linked substreams | |
645 | * @s: the iterator | |
646 | * @substream: the substream | |
647 | * | |
648 | * Iterate over the all linked substreams to the given @substream. | |
649 | * When @substream isn't linked with any others, this gives returns @substream | |
650 | * itself once. | |
651 | */ | |
ef991b95 TI |
652 | #define snd_pcm_group_for_each_entry(s, substream) \ |
653 | list_for_each_entry(s, &substream->group->substreams, link_list) | |
1da177e4 | 654 | |
30b771cf TI |
655 | /** |
656 | * snd_pcm_running - Check whether the substream is in a running state | |
657 | * @substream: substream to check | |
658 | * | |
659 | * Returns true if the given substream is in the state RUNNING, or in the | |
660 | * state DRAINING for playback. | |
661 | */ | |
877211f5 | 662 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
1da177e4 LT |
663 | { |
664 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
665 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
666 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); | |
667 | } | |
668 | ||
30b771cf TI |
669 | /** |
670 | * bytes_to_samples - Unit conversion of the size from bytes to samples | |
671 | * @runtime: PCM runtime instance | |
672 | * @size: size in bytes | |
673 | */ | |
877211f5 | 674 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
675 | { |
676 | return size * 8 / runtime->sample_bits; | |
677 | } | |
678 | ||
30b771cf TI |
679 | /** |
680 | * bytes_to_frames - Unit conversion of the size from bytes to frames | |
681 | * @runtime: PCM runtime instance | |
682 | * @size: size in bytes | |
683 | */ | |
877211f5 | 684 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
685 | { |
686 | return size * 8 / runtime->frame_bits; | |
687 | } | |
688 | ||
30b771cf TI |
689 | /** |
690 | * samples_to_bytes - Unit conversion of the size from samples to bytes | |
691 | * @runtime: PCM runtime instance | |
692 | * @size: size in samples | |
693 | */ | |
877211f5 | 694 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
695 | { |
696 | return size * runtime->sample_bits / 8; | |
697 | } | |
698 | ||
30b771cf TI |
699 | /** |
700 | * frames_to_bytes - Unit conversion of the size from frames to bytes | |
701 | * @runtime: PCM runtime instance | |
702 | * @size: size in frames | |
703 | */ | |
877211f5 | 704 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
1da177e4 LT |
705 | { |
706 | return size * runtime->frame_bits / 8; | |
707 | } | |
708 | ||
30b771cf TI |
709 | /** |
710 | * frame_aligned - Check whether the byte size is aligned to frames | |
711 | * @runtime: PCM runtime instance | |
712 | * @bytes: size in bytes | |
713 | */ | |
877211f5 | 714 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
1da177e4 LT |
715 | { |
716 | return bytes % runtime->byte_align == 0; | |
717 | } | |
718 | ||
30b771cf TI |
719 | /** |
720 | * snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes | |
721 | * @substream: PCM substream | |
722 | */ | |
877211f5 | 723 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 724 | { |
877211f5 | 725 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
726 | return frames_to_bytes(runtime, runtime->buffer_size); |
727 | } | |
728 | ||
30b771cf TI |
729 | /** |
730 | * snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes | |
731 | * @substream: PCM substream | |
732 | */ | |
877211f5 | 733 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 734 | { |
877211f5 | 735 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
736 | return frames_to_bytes(runtime, runtime->period_size); |
737 | } | |
738 | ||
30b771cf TI |
739 | /** |
740 | * snd_pcm_playback_avail - Get the available (writable) space for playback | |
741 | * @runtime: PCM runtime instance | |
742 | * | |
743 | * Result is between 0 ... (boundary - 1) | |
1da177e4 | 744 | */ |
877211f5 | 745 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
746 | { |
747 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; | |
748 | if (avail < 0) | |
749 | avail += runtime->boundary; | |
750 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) | |
751 | avail -= runtime->boundary; | |
752 | return avail; | |
753 | } | |
754 | ||
30b771cf TI |
755 | /** |
756 | * snd_pcm_playback_avail - Get the available (readable) space for capture | |
757 | * @runtime: PCM runtime instance | |
758 | * | |
759 | * Result is between 0 ... (boundary - 1) | |
1da177e4 | 760 | */ |
877211f5 | 761 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
762 | { |
763 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; | |
764 | if (avail < 0) | |
765 | avail += runtime->boundary; | |
766 | return avail; | |
767 | } | |
768 | ||
30b771cf TI |
769 | /** |
770 | * snd_pcm_playback_hw_avail - Get the queued space for playback | |
771 | * @runtime: PCM runtime instance | |
772 | */ | |
877211f5 | 773 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
774 | { |
775 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); | |
776 | } | |
777 | ||
30b771cf TI |
778 | /** |
779 | * snd_pcm_capture_hw_avail - Get the free space for capture | |
780 | * @runtime: PCM runtime instance | |
781 | */ | |
877211f5 | 782 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
783 | { |
784 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); | |
785 | } | |
786 | ||
787 | /** | |
788 | * snd_pcm_playback_ready - check whether the playback buffer is available | |
789 | * @substream: the pcm substream instance | |
790 | * | |
791 | * Checks whether enough free space is available on the playback buffer. | |
792 | * | |
eb7c06e8 | 793 | * Return: Non-zero if available, or zero if not. |
1da177e4 | 794 | */ |
877211f5 | 795 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
1da177e4 | 796 | { |
877211f5 | 797 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
798 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
799 | } | |
800 | ||
801 | /** | |
802 | * snd_pcm_capture_ready - check whether the capture buffer is available | |
803 | * @substream: the pcm substream instance | |
804 | * | |
805 | * Checks whether enough capture data is available on the capture buffer. | |
806 | * | |
eb7c06e8 | 807 | * Return: Non-zero if available, or zero if not. |
1da177e4 | 808 | */ |
877211f5 | 809 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
1da177e4 | 810 | { |
877211f5 | 811 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
812 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
813 | } | |
814 | ||
815 | /** | |
816 | * snd_pcm_playback_data - check whether any data exists on the playback buffer | |
817 | * @substream: the pcm substream instance | |
818 | * | |
eb7c06e8 | 819 | * Checks whether any data exists on the playback buffer. |
1da177e4 | 820 | * |
eb7c06e8 YB |
821 | * Return: Non-zero if any data exists, or zero if not. If stop_threshold |
822 | * is bigger or equal to boundary, then this function returns always non-zero. | |
1da177e4 | 823 | */ |
877211f5 | 824 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
1da177e4 | 825 | { |
877211f5 | 826 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
827 | |
828 | if (runtime->stop_threshold >= runtime->boundary) | |
829 | return 1; | |
830 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; | |
831 | } | |
832 | ||
833 | /** | |
834 | * snd_pcm_playback_empty - check whether the playback buffer is empty | |
835 | * @substream: the pcm substream instance | |
836 | * | |
837 | * Checks whether the playback buffer is empty. | |
838 | * | |
eb7c06e8 | 839 | * Return: Non-zero if empty, or zero if not. |
1da177e4 | 840 | */ |
877211f5 | 841 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
1da177e4 | 842 | { |
877211f5 | 843 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
844 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
845 | } | |
846 | ||
847 | /** | |
848 | * snd_pcm_capture_empty - check whether the capture buffer is empty | |
849 | * @substream: the pcm substream instance | |
850 | * | |
851 | * Checks whether the capture buffer is empty. | |
852 | * | |
eb7c06e8 | 853 | * Return: Non-zero if empty, or zero if not. |
1da177e4 | 854 | */ |
877211f5 | 855 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
1da177e4 | 856 | { |
877211f5 | 857 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
858 | return snd_pcm_capture_avail(runtime) == 0; |
859 | } | |
860 | ||
30b771cf TI |
861 | /** |
862 | * snd_pcm_trigger_done - Mark the master substream | |
863 | * @substream: the pcm substream instance | |
864 | * @master: the linked master substream | |
865 | * | |
866 | * When multiple substreams of the same card are linked and the hardware | |
867 | * supports the single-shot operation, the driver calls this in the loop | |
868 | * in snd_pcm_group_for_each_entry() for marking the substream as "done". | |
869 | * Then most of trigger operations are performed only to the given master | |
870 | * substream. | |
871 | * | |
872 | * The trigger_master mark is cleared at timestamp updates at the end | |
873 | * of trigger operations. | |
874 | */ | |
877211f5 TI |
875 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
876 | struct snd_pcm_substream *master) | |
1da177e4 LT |
877 | { |
878 | substream->runtime->trigger_master = master; | |
879 | } | |
880 | ||
881 | static inline int hw_is_mask(int var) | |
882 | { | |
883 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && | |
884 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; | |
885 | } | |
886 | ||
887 | static inline int hw_is_interval(int var) | |
888 | { | |
889 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && | |
890 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; | |
891 | } | |
892 | ||
877211f5 | 893 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
1da177e4 LT |
894 | snd_pcm_hw_param_t var) |
895 | { | |
896 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
897 | } | |
898 | ||
877211f5 | 899 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
1da177e4 LT |
900 | snd_pcm_hw_param_t var) |
901 | { | |
902 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
903 | } | |
904 | ||
877211f5 | 905 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
906 | snd_pcm_hw_param_t var) |
907 | { | |
b9f09a48 | 908 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
1da177e4 LT |
909 | } |
910 | ||
877211f5 | 911 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
912 | snd_pcm_hw_param_t var) |
913 | { | |
b9f09a48 | 914 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
1da177e4 LT |
915 | } |
916 | ||
85926e0f TI |
917 | /** |
918 | * params_channels - Get the number of channels from the hw params | |
919 | * @p: hw params | |
920 | */ | |
921 | static inline unsigned int params_channels(const struct snd_pcm_hw_params *p) | |
922 | { | |
923 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min; | |
924 | } | |
925 | ||
926 | /** | |
62f64a88 | 927 | * params_rate - Get the sample rate from the hw params |
85926e0f TI |
928 | * @p: hw params |
929 | */ | |
930 | static inline unsigned int params_rate(const struct snd_pcm_hw_params *p) | |
931 | { | |
932 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min; | |
933 | } | |
934 | ||
935 | /** | |
62f64a88 | 936 | * params_period_size - Get the period size (in frames) from the hw params |
85926e0f TI |
937 | * @p: hw params |
938 | */ | |
939 | static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p) | |
940 | { | |
941 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min; | |
942 | } | |
943 | ||
944 | /** | |
62f64a88 | 945 | * params_periods - Get the number of periods from the hw params |
85926e0f TI |
946 | * @p: hw params |
947 | */ | |
948 | static inline unsigned int params_periods(const struct snd_pcm_hw_params *p) | |
949 | { | |
950 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min; | |
951 | } | |
952 | ||
953 | /** | |
62f64a88 | 954 | * params_buffer_size - Get the buffer size (in frames) from the hw params |
85926e0f TI |
955 | * @p: hw params |
956 | */ | |
957 | static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p) | |
958 | { | |
959 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min; | |
960 | } | |
961 | ||
962 | /** | |
62f64a88 | 963 | * params_buffer_bytes - Get the buffer size (in bytes) from the hw params |
85926e0f TI |
964 | * @p: hw params |
965 | */ | |
966 | static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p) | |
967 | { | |
968 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min; | |
969 | } | |
1da177e4 | 970 | |
877211f5 TI |
971 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
972 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
973 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
974 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, | |
975 | unsigned int k, struct snd_interval *c); | |
976 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, | |
977 | const struct snd_interval *b, struct snd_interval *c); | |
4af87a93 MB |
978 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
979 | const unsigned int *list, unsigned int mask); | |
f66f898e PR |
980 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, |
981 | const struct snd_interval *list, unsigned int mask); | |
877211f5 TI |
982 | int snd_interval_ratnum(struct snd_interval *i, |
983 | unsigned int rats_count, struct snd_ratnum *rats, | |
1da177e4 LT |
984 | unsigned int *nump, unsigned int *denp); |
985 | ||
877211f5 TI |
986 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
987 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); | |
877211f5 | 988 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 989 | |
877211f5 | 990 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 991 | |
877211f5 TI |
992 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
993 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); | |
1da177e4 | 994 | |
877211f5 | 995 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 996 | u_int32_t mask); |
877211f5 | 997 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 998 | u_int64_t mask); |
877211f5 | 999 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 1000 | unsigned int min, unsigned int max); |
877211f5 TI |
1001 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
1002 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
1003 | unsigned int cond, |
1004 | snd_pcm_hw_param_t var, | |
1464189f | 1005 | const struct snd_pcm_hw_constraint_list *l); |
f66f898e PR |
1006 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, |
1007 | unsigned int cond, | |
1008 | snd_pcm_hw_param_t var, | |
1009 | const struct snd_pcm_hw_constraint_ranges *r); | |
877211f5 | 1010 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1011 | unsigned int cond, |
1012 | snd_pcm_hw_param_t var, | |
877211f5 TI |
1013 | struct snd_pcm_hw_constraint_ratnums *r); |
1014 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
1015 | unsigned int cond, |
1016 | snd_pcm_hw_param_t var, | |
877211f5 TI |
1017 | struct snd_pcm_hw_constraint_ratdens *r); |
1018 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
1019 | unsigned int cond, |
1020 | unsigned int width, | |
1021 | unsigned int msbits); | |
877211f5 | 1022 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1023 | unsigned int cond, |
1024 | snd_pcm_hw_param_t var, | |
1025 | unsigned long step); | |
877211f5 | 1026 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1027 | unsigned int cond, |
1028 | snd_pcm_hw_param_t var); | |
d5b702a6 CL |
1029 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, |
1030 | unsigned int base_rate); | |
877211f5 | 1031 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1032 | unsigned int cond, |
1033 | int var, | |
1034 | snd_pcm_hw_rule_func_t func, void *private, | |
1035 | int dep, ...); | |
1036 | ||
1037 | int snd_pcm_format_signed(snd_pcm_format_t format); | |
1038 | int snd_pcm_format_unsigned(snd_pcm_format_t format); | |
1039 | int snd_pcm_format_linear(snd_pcm_format_t format); | |
1040 | int snd_pcm_format_little_endian(snd_pcm_format_t format); | |
1041 | int snd_pcm_format_big_endian(snd_pcm_format_t format); | |
1b44c28d TI |
1042 | #if 0 /* just for DocBook */ |
1043 | /** | |
9502dcad TI |
1044 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
1045 | * @format: the format to check | |
1046 | * | |
eb7c06e8 | 1047 | * Return: 1 if the given PCM format is CPU-endian, 0 if |
9502dcad TI |
1048 | * opposite, or a negative error code if endian not specified. |
1049 | */ | |
8cdfd251 | 1050 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
1b44c28d | 1051 | #endif /* DocBook */ |
9502dcad | 1052 | #ifdef SNDRV_LITTLE_ENDIAN |
9d01a82e | 1053 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
9502dcad | 1054 | #else |
9d01a82e | 1055 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
9502dcad | 1056 | #endif |
1da177e4 LT |
1057 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
1058 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ | |
9502dcad | 1059 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
1da177e4 LT |
1060 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
1061 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); | |
1da177e4 | 1062 | |
e6c2e7eb LPC |
1063 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, |
1064 | const struct snd_pcm_ops *ops); | |
877211f5 | 1065 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); |
877211f5 | 1066 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 | 1067 | unsigned int cmd, void *arg); |
1250932e JK |
1068 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
1069 | struct snd_pcm_runtime *runtime); | |
877211f5 | 1070 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
877211f5 | 1071 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); |
877211f5 TI |
1072 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); |
1073 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, | |
1da177e4 LT |
1074 | const void __user *buf, |
1075 | snd_pcm_uframes_t frames); | |
877211f5 | 1076 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
1da177e4 | 1077 | void __user *buf, snd_pcm_uframes_t frames); |
877211f5 | 1078 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 | 1079 | void __user **bufs, snd_pcm_uframes_t frames); |
877211f5 | 1080 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
1081 | void __user **bufs, snd_pcm_uframes_t frames); |
1082 | ||
7653d557 CL |
1083 | extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; |
1084 | ||
877211f5 | 1085 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
918f3a0e | 1086 | unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); |
4be77a53 | 1087 | unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); |
e3a9269f LPC |
1088 | unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a, |
1089 | unsigned int rates_b); | |
1da177e4 | 1090 | |
30b771cf TI |
1091 | /** |
1092 | * snd_pcm_set_runtime_buffer - Set the PCM runtime buffer | |
1093 | * @substream: PCM substream to set | |
1094 | * @bufp: the buffer information, NULL to clear | |
1095 | * | |
1096 | * Copy the buffer information to runtime->dma_buffer when @bufp is non-NULL. | |
1097 | * Otherwise it clears the current buffer information. | |
1098 | */ | |
877211f5 | 1099 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1100 | struct snd_dma_buffer *bufp) |
1101 | { | |
877211f5 | 1102 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1103 | if (bufp) { |
1104 | runtime->dma_buffer_p = bufp; | |
1105 | runtime->dma_area = bufp->area; | |
1106 | runtime->dma_addr = bufp->addr; | |
1107 | runtime->dma_bytes = bufp->bytes; | |
1108 | } else { | |
1109 | runtime->dma_buffer_p = NULL; | |
1110 | runtime->dma_area = NULL; | |
1111 | runtime->dma_addr = 0; | |
1112 | runtime->dma_bytes = 0; | |
1113 | } | |
1114 | } | |
1115 | ||
1116 | /* | |
1117 | * Timer interface | |
1118 | */ | |
1119 | ||
877211f5 TI |
1120 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
1121 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); | |
1122 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); | |
1da177e4 | 1123 | |
30b771cf TI |
1124 | /** |
1125 | * snd_pcm_gettime - Fill the timespec depending on the timestamp mode | |
1126 | * @runtime: PCM runtime instance | |
1127 | * @tv: timespec to fill | |
1128 | */ | |
b751eef1 JK |
1129 | static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, |
1130 | struct timespec *tv) | |
1131 | { | |
0ac8a52d MB |
1132 | switch (runtime->tstamp_type) { |
1133 | case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC: | |
26204e04 | 1134 | ktime_get_ts(tv); |
0ac8a52d MB |
1135 | break; |
1136 | case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW: | |
1137 | getrawmonotonic(tv); | |
1138 | break; | |
1139 | default: | |
b751eef1 | 1140 | getnstimeofday(tv); |
0ac8a52d MB |
1141 | break; |
1142 | } | |
b751eef1 JK |
1143 | } |
1144 | ||
1da177e4 LT |
1145 | /* |
1146 | * Memory | |
1147 | */ | |
1148 | ||
877211f5 TI |
1149 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
1150 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); | |
1151 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, | |
1da177e4 LT |
1152 | int type, struct device *data, |
1153 | size_t size, size_t max); | |
877211f5 | 1154 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
1da177e4 LT |
1155 | int type, void *data, |
1156 | size_t size, size_t max); | |
877211f5 TI |
1157 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
1158 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); | |
1da177e4 | 1159 | |
681b84e1 CL |
1160 | int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, |
1161 | size_t size, gfp_t gfp_flags); | |
1162 | int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); | |
1163 | struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, | |
1164 | unsigned long offset); | |
681b84e1 CL |
1165 | /** |
1166 | * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer | |
1167 | * @substream: the substream to allocate the buffer to | |
1168 | * @size: the requested buffer size, in bytes | |
1169 | * | |
1170 | * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is | |
1171 | * contiguous in kernel virtual space, but not in physical memory. Use this | |
1172 | * if the buffer is accessed by kernel code but not by device DMA. | |
1173 | * | |
eb7c06e8 | 1174 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error |
681b84e1 CL |
1175 | * code. |
1176 | */ | |
f213d8f7 TI |
1177 | static inline int snd_pcm_lib_alloc_vmalloc_buffer |
1178 | (struct snd_pcm_substream *substream, size_t size) | |
1179 | { | |
1180 | return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, | |
1181 | GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO); | |
1182 | } | |
1183 | ||
681b84e1 CL |
1184 | /** |
1185 | * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer | |
1186 | * @substream: the substream to allocate the buffer to | |
1187 | * @size: the requested buffer size, in bytes | |
1188 | * | |
1189 | * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses | |
1190 | * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. | |
eb7c06e8 YB |
1191 | * |
1192 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error | |
1193 | * code. | |
681b84e1 | 1194 | */ |
f213d8f7 TI |
1195 | static inline int snd_pcm_lib_alloc_vmalloc_32_buffer |
1196 | (struct snd_pcm_substream *substream, size_t size) | |
1197 | { | |
1198 | return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, | |
1199 | GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); | |
1200 | } | |
681b84e1 | 1201 | |
9d069dc0 TI |
1202 | #define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p) |
1203 | ||
cc6a8acd | 1204 | #ifdef CONFIG_SND_DMA_SGBUF |
77a23f26 TI |
1205 | /* |
1206 | * SG-buffer handling | |
1207 | */ | |
1208 | #define snd_pcm_substream_sgbuf(substream) \ | |
9d069dc0 | 1209 | snd_pcm_get_dma_buf(substream)->private_data |
77a23f26 TI |
1210 | |
1211 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, | |
1212 | unsigned long offset); | |
cc6a8acd TI |
1213 | #else /* !SND_DMA_SGBUF */ |
1214 | /* | |
1215 | * fake using a continuous buffer | |
1216 | */ | |
9d069dc0 TI |
1217 | #define snd_pcm_sgbuf_ops_page NULL |
1218 | #endif /* SND_DMA_SGBUF */ | |
1219 | ||
30b771cf TI |
1220 | /** |
1221 | * snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset | |
1222 | * @substream: PCM substream | |
1223 | * @ofs: byte offset | |
1224 | */ | |
cc6a8acd TI |
1225 | static inline dma_addr_t |
1226 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) | |
1227 | { | |
9d069dc0 | 1228 | return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs); |
cc6a8acd TI |
1229 | } |
1230 | ||
30b771cf TI |
1231 | /** |
1232 | * snd_pcm_sgbuf_get_ptr - Get the virtual address at the corresponding offset | |
1233 | * @substream: PCM substream | |
1234 | * @ofs: byte offset | |
1235 | */ | |
cc6a8acd TI |
1236 | static inline void * |
1237 | snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) | |
1238 | { | |
9d069dc0 | 1239 | return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs); |
cc6a8acd TI |
1240 | } |
1241 | ||
30b771cf TI |
1242 | /** |
1243 | * snd_pcm_sgbuf_chunk_size - Compute the max size that fits within the contig. | |
1244 | * page from the given size | |
1245 | * @substream: PCM substream | |
1246 | * @ofs: byte offset | |
1247 | * @size: byte size to examine | |
1248 | */ | |
9d069dc0 TI |
1249 | static inline unsigned int |
1250 | snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, | |
1251 | unsigned int ofs, unsigned int size) | |
1252 | { | |
1253 | return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size); | |
1254 | } | |
cc6a8acd | 1255 | |
30b771cf TI |
1256 | /** |
1257 | * snd_pcm_mmap_data_open - increase the mmap counter | |
1258 | * @area: VMA | |
1259 | * | |
1260 | * PCM mmap callback should handle this counter properly | |
1261 | */ | |
1da177e4 LT |
1262 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) |
1263 | { | |
877211f5 | 1264 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 1265 | atomic_inc(&substream->mmap_count); |
1da177e4 LT |
1266 | } |
1267 | ||
30b771cf TI |
1268 | /** |
1269 | * snd_pcm_mmap_data_close - decrease the mmap counter | |
1270 | * @area: VMA | |
1271 | * | |
1272 | * PCM mmap callback should handle this counter properly | |
1273 | */ | |
1da177e4 LT |
1274 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) |
1275 | { | |
877211f5 | 1276 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 1277 | atomic_dec(&substream->mmap_count); |
1da177e4 LT |
1278 | } |
1279 | ||
18a2b962 TI |
1280 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
1281 | struct vm_area_struct *area); | |
1da177e4 LT |
1282 | /* mmap for io-memory area */ |
1283 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
1284 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP | |
877211f5 | 1285 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
1da177e4 LT |
1286 | #else |
1287 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 | |
1288 | #define snd_pcm_lib_mmap_iomem NULL | |
1289 | #endif | |
1290 | ||
3674f19d | 1291 | #define snd_pcm_lib_mmap_vmalloc NULL |
c32d977b | 1292 | |
30b771cf TI |
1293 | /** |
1294 | * snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer | |
1295 | * @dma: DMA number | |
1296 | * @max: pointer to store the max size | |
1297 | */ | |
1da177e4 LT |
1298 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) |
1299 | { | |
1300 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; | |
1301 | } | |
1302 | ||
1303 | /* | |
1304 | * Misc | |
1305 | */ | |
1306 | ||
1307 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ | |
1308 | (IEC958_AES1_CON_ORIGINAL<<8)|\ | |
1309 | (IEC958_AES1_CON_PCM_CODER<<8)|\ | |
1310 | (IEC958_AES3_CON_FS_48000<<24)) | |
1311 | ||
7eaa943c TI |
1312 | #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) |
1313 | ||
6e5265ec TI |
1314 | const char *snd_pcm_format_name(snd_pcm_format_t format); |
1315 | ||
1aad779f | 1316 | /** |
8513915a RD |
1317 | * snd_pcm_stream_str - Get a string naming the direction of a stream |
1318 | * @substream: the pcm substream instance | |
eb7c06e8 YB |
1319 | * |
1320 | * Return: A string naming the direction of the stream. | |
1aad779f OL |
1321 | */ |
1322 | static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream) | |
1323 | { | |
1324 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
1325 | return "Playback"; | |
1326 | else | |
1327 | return "Capture"; | |
1328 | } | |
1329 | ||
2d3391ec TI |
1330 | /* |
1331 | * PCM channel-mapping control API | |
1332 | */ | |
1333 | /* array element of channel maps */ | |
1334 | struct snd_pcm_chmap_elem { | |
1335 | unsigned char channels; | |
1336 | unsigned char map[15]; | |
1337 | }; | |
1338 | ||
1339 | /* channel map information; retrieved via snd_kcontrol_chip() */ | |
1340 | struct snd_pcm_chmap { | |
1341 | struct snd_pcm *pcm; /* assigned PCM instance */ | |
1342 | int stream; /* PLAYBACK or CAPTURE */ | |
1343 | struct snd_kcontrol *kctl; | |
1344 | const struct snd_pcm_chmap_elem *chmap; | |
1345 | unsigned int max_channels; | |
1346 | unsigned int channel_mask; /* optional: active channels bitmask */ | |
1347 | void *private_data; /* optional: private data pointer */ | |
1348 | }; | |
1349 | ||
30b771cf TI |
1350 | /** |
1351 | * snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info | |
1352 | * @info: chmap information | |
1353 | * @idx: the substream number index | |
1354 | */ | |
2d3391ec TI |
1355 | static inline struct snd_pcm_substream * |
1356 | snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) | |
1357 | { | |
1358 | struct snd_pcm_substream *s; | |
1359 | for (s = info->pcm->streams[info->stream].substream; s; s = s->next) | |
1360 | if (s->number == idx) | |
1361 | return s; | |
1362 | return NULL; | |
1363 | } | |
1364 | ||
1365 | /* ALSA-standard channel maps (RL/RR prior to C/LFE) */ | |
1366 | extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[]; | |
1367 | /* Other world's standard channel maps (C/LFE prior to RL/RR) */ | |
1368 | extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[]; | |
1369 | ||
1370 | /* bit masks to be passed to snd_pcm_chmap.channel_mask field */ | |
1371 | #define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4)) | |
1372 | #define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6)) | |
1373 | #define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8)) | |
1374 | ||
1375 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
1376 | const struct snd_pcm_chmap_elem *chmap, | |
1377 | int max_channels, | |
1378 | unsigned long private_value, | |
1379 | struct snd_pcm_chmap **info_ret); | |
1380 | ||
30b771cf TI |
1381 | /** |
1382 | * pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise | |
1383 | * @pcm_format: PCM format | |
1384 | */ | |
74c34ca1 EZ |
1385 | static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) |
1386 | { | |
1387 | return 1ULL << (__force int) pcm_format; | |
1388 | } | |
1389 | ||
09e56df8 TI |
1390 | /* printk helpers */ |
1391 | #define pcm_err(pcm, fmt, args...) \ | |
1392 | dev_err((pcm)->card->dev, fmt, ##args) | |
1393 | #define pcm_warn(pcm, fmt, args...) \ | |
1394 | dev_warn((pcm)->card->dev, fmt, ##args) | |
1395 | #define pcm_dbg(pcm, fmt, args...) \ | |
1396 | dev_dbg((pcm)->card->dev, fmt, ##args) | |
1397 | ||
1da177e4 | 1398 | #endif /* __SOUND_PCM_H */ |