Commit | Line | Data |
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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 LT |
31 | #include <linux/bitops.h> |
32 | ||
1da177e4 LT |
33 | #define snd_pcm_substream_chip(substream) ((substream)->private_data) |
34 | #define snd_pcm_chip(pcm) ((pcm)->private_data) | |
35 | ||
1da177e4 LT |
36 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
37 | #include "pcm_oss.h" | |
38 | #endif | |
39 | ||
40 | /* | |
41 | * Hardware (lowlevel) section | |
42 | */ | |
43 | ||
877211f5 | 44 | struct snd_pcm_hardware { |
1da177e4 LT |
45 | unsigned int info; /* SNDRV_PCM_INFO_* */ |
46 | u64 formats; /* SNDRV_PCM_FMTBIT_* */ | |
47 | unsigned int rates; /* SNDRV_PCM_RATE_* */ | |
48 | unsigned int rate_min; /* min rate */ | |
49 | unsigned int rate_max; /* max rate */ | |
50 | unsigned int channels_min; /* min channels */ | |
51 | unsigned int channels_max; /* max channels */ | |
52 | size_t buffer_bytes_max; /* max buffer size */ | |
53 | size_t period_bytes_min; /* min period size */ | |
54 | size_t period_bytes_max; /* max period size */ | |
55 | unsigned int periods_min; /* min # of periods */ | |
56 | unsigned int periods_max; /* max # of periods */ | |
57 | size_t fifo_size; /* fifo size in bytes */ | |
877211f5 | 58 | }; |
1da177e4 | 59 | |
e0e6ce03 RD |
60 | struct snd_pcm_substream; |
61 | ||
877211f5 TI |
62 | struct snd_pcm_ops { |
63 | int (*open)(struct snd_pcm_substream *substream); | |
64 | int (*close)(struct snd_pcm_substream *substream); | |
65 | int (*ioctl)(struct snd_pcm_substream * substream, | |
1da177e4 | 66 | unsigned int cmd, void *arg); |
877211f5 TI |
67 | int (*hw_params)(struct snd_pcm_substream *substream, |
68 | struct snd_pcm_hw_params *params); | |
69 | int (*hw_free)(struct snd_pcm_substream *substream); | |
70 | int (*prepare)(struct snd_pcm_substream *substream); | |
71 | int (*trigger)(struct snd_pcm_substream *substream, int cmd); | |
72 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); | |
73 | int (*copy)(struct snd_pcm_substream *substream, int channel, | |
74 | snd_pcm_uframes_t pos, | |
1da177e4 | 75 | void __user *buf, snd_pcm_uframes_t count); |
877211f5 | 76 | int (*silence)(struct snd_pcm_substream *substream, int channel, |
1da177e4 | 77 | snd_pcm_uframes_t pos, snd_pcm_uframes_t count); |
877211f5 TI |
78 | struct page *(*page)(struct snd_pcm_substream *substream, |
79 | unsigned long offset); | |
80 | int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); | |
81 | int (*ack)(struct snd_pcm_substream *substream); | |
82 | }; | |
1da177e4 LT |
83 | |
84 | /* | |
85 | * | |
86 | */ | |
87 | ||
f90c06a2 PM |
88 | #if defined(CONFIG_SND_DYNAMIC_MINORS) |
89 | #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2) | |
90 | #else | |
91 | #define SNDRV_PCM_DEVICES 8 | |
92 | #endif | |
896e6cc2 | 93 | |
1da177e4 LT |
94 | #define SNDRV_PCM_IOCTL1_FALSE ((void *)0) |
95 | #define SNDRV_PCM_IOCTL1_TRUE ((void *)1) | |
96 | ||
97 | #define SNDRV_PCM_IOCTL1_RESET 0 | |
98 | #define SNDRV_PCM_IOCTL1_INFO 1 | |
99 | #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 | |
100 | #define SNDRV_PCM_IOCTL1_GSTATE 3 | |
8bea869c | 101 | #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 |
1da177e4 LT |
102 | |
103 | #define SNDRV_PCM_TRIGGER_STOP 0 | |
104 | #define SNDRV_PCM_TRIGGER_START 1 | |
105 | #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 | |
106 | #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 | |
107 | #define SNDRV_PCM_TRIGGER_SUSPEND 5 | |
108 | #define SNDRV_PCM_TRIGGER_RESUME 6 | |
109 | ||
110 | #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) | |
111 | ||
112 | /* If you change this don't forget to change rates[] table in pcm_native.c */ | |
113 | #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ | |
114 | #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ | |
115 | #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ | |
116 | #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ | |
117 | #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ | |
118 | #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ | |
119 | #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ | |
120 | #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ | |
121 | #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ | |
122 | #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ | |
123 | #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ | |
124 | #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ | |
125 | #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ | |
126 | ||
127 | #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ | |
128 | #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ | |
129 | ||
130 | #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ | |
131 | SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ | |
132 | SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) | |
133 | #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) | |
134 | #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ | |
135 | SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) | |
136 | #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ | |
137 | SNDRV_PCM_RATE_192000) | |
138 | #define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8) | |
139 | #define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8) | |
140 | #define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE) | |
141 | #define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE) | |
142 | #define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE) | |
143 | #define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE) | |
144 | #define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE) | |
145 | #define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE) | |
146 | #define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE) | |
147 | #define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE) | |
148 | #define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE) | |
149 | #define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE) | |
150 | #define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE) | |
151 | #define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE) | |
152 | #define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE) | |
153 | #define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE) | |
154 | #define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE) | |
155 | #define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE) | |
156 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE) | |
157 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE) | |
158 | #define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW) | |
159 | #define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW) | |
160 | #define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM) | |
161 | #define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG) | |
162 | #define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM) | |
163 | #define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL) | |
164 | #define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE) | |
165 | #define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE) | |
166 | #define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE) | |
167 | #define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE) | |
168 | #define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE) | |
169 | #define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE) | |
170 | #define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE) | |
171 | #define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE) | |
172 | #define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE) | |
173 | #define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE) | |
174 | #define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE) | |
175 | #define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE) | |
176 | ||
177 | #ifdef SNDRV_LITTLE_ENDIAN | |
178 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE | |
179 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE | |
180 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE | |
181 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE | |
182 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE | |
183 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE | |
184 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE | |
185 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE | |
186 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | |
187 | #endif | |
188 | #ifdef SNDRV_BIG_ENDIAN | |
189 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE | |
190 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE | |
191 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE | |
192 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE | |
193 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE | |
194 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE | |
195 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE | |
196 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE | |
197 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE | |
198 | #endif | |
199 | ||
877211f5 TI |
200 | struct snd_pcm_file { |
201 | struct snd_pcm_substream *substream; | |
548a648b | 202 | int no_compat_mmap; |
1da177e4 LT |
203 | }; |
204 | ||
877211f5 TI |
205 | struct snd_pcm_hw_rule; |
206 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, | |
207 | struct snd_pcm_hw_rule *rule); | |
1da177e4 | 208 | |
877211f5 | 209 | struct snd_pcm_hw_rule { |
1da177e4 LT |
210 | unsigned int cond; |
211 | snd_pcm_hw_rule_func_t func; | |
212 | int var; | |
213 | int deps[4]; | |
214 | void *private; | |
215 | }; | |
216 | ||
877211f5 TI |
217 | struct snd_pcm_hw_constraints { |
218 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - | |
1da177e4 | 219 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
877211f5 | 220 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
1da177e4 LT |
221 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
222 | unsigned int rules_num; | |
223 | unsigned int rules_all; | |
877211f5 TI |
224 | struct snd_pcm_hw_rule *rules; |
225 | }; | |
1da177e4 | 226 | |
877211f5 TI |
227 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
228 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
229 | { |
230 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
231 | } | |
232 | ||
877211f5 TI |
233 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
234 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
235 | { |
236 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
237 | } | |
238 | ||
877211f5 | 239 | struct snd_ratnum { |
1da177e4 LT |
240 | unsigned int num; |
241 | unsigned int den_min, den_max, den_step; | |
877211f5 | 242 | }; |
1da177e4 | 243 | |
877211f5 | 244 | struct snd_ratden { |
1da177e4 LT |
245 | unsigned int num_min, num_max, num_step; |
246 | unsigned int den; | |
877211f5 | 247 | }; |
1da177e4 | 248 | |
877211f5 | 249 | struct snd_pcm_hw_constraint_ratnums { |
1da177e4 | 250 | int nrats; |
877211f5 TI |
251 | struct snd_ratnum *rats; |
252 | }; | |
1da177e4 | 253 | |
877211f5 | 254 | struct snd_pcm_hw_constraint_ratdens { |
1da177e4 | 255 | int nrats; |
877211f5 TI |
256 | struct snd_ratden *rats; |
257 | }; | |
1da177e4 | 258 | |
877211f5 | 259 | struct snd_pcm_hw_constraint_list { |
1da177e4 LT |
260 | unsigned int count; |
261 | unsigned int *list; | |
262 | unsigned int mask; | |
877211f5 | 263 | }; |
1da177e4 | 264 | |
877211f5 | 265 | struct snd_pcm_runtime { |
1da177e4 | 266 | /* -- Status -- */ |
877211f5 | 267 | struct snd_pcm_substream *trigger_master; |
07799e75 | 268 | struct timespec trigger_tstamp; /* trigger timestamp */ |
1da177e4 LT |
269 | int overrange; |
270 | snd_pcm_uframes_t avail_max; | |
271 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ | |
bbf6ad13 JK |
272 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ |
273 | unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ | |
4bbe1ddf | 274 | snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ |
1da177e4 LT |
275 | |
276 | /* -- HW params -- */ | |
277 | snd_pcm_access_t access; /* access mode */ | |
278 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ | |
279 | snd_pcm_subformat_t subformat; /* subformat */ | |
280 | unsigned int rate; /* rate in Hz */ | |
281 | unsigned int channels; /* channels */ | |
282 | snd_pcm_uframes_t period_size; /* period size */ | |
283 | unsigned int periods; /* periods */ | |
284 | snd_pcm_uframes_t buffer_size; /* buffer size */ | |
1da177e4 LT |
285 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ |
286 | size_t byte_align; | |
287 | unsigned int frame_bits; | |
288 | unsigned int sample_bits; | |
289 | unsigned int info; | |
290 | unsigned int rate_num; | |
291 | unsigned int rate_den; | |
292 | ||
293 | /* -- SW params -- */ | |
877211f5 | 294 | int tstamp_mode; /* mmap timestamp is updated */ |
1da177e4 | 295 | unsigned int period_step; |
1da177e4 LT |
296 | snd_pcm_uframes_t start_threshold; |
297 | snd_pcm_uframes_t stop_threshold; | |
298 | snd_pcm_uframes_t silence_threshold; /* Silence filling happens when | |
299 | noise is nearest than this */ | |
300 | snd_pcm_uframes_t silence_size; /* Silence filling size */ | |
301 | snd_pcm_uframes_t boundary; /* pointers wrap point */ | |
302 | ||
303 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ | |
304 | snd_pcm_uframes_t silence_filled; /* size filled with silence */ | |
305 | ||
877211f5 | 306 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ |
1da177e4 LT |
307 | |
308 | /* -- mmap -- */ | |
503fc85a TI |
309 | struct snd_pcm_mmap_status *status; |
310 | struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
311 | |
312 | /* -- locking / scheduling -- */ | |
313 | wait_queue_head_t sleep; | |
1da177e4 LT |
314 | struct fasync_struct *fasync; |
315 | ||
316 | /* -- private section -- */ | |
317 | void *private_data; | |
877211f5 | 318 | void (*private_free)(struct snd_pcm_runtime *runtime); |
1da177e4 LT |
319 | |
320 | /* -- hardware description -- */ | |
877211f5 TI |
321 | struct snd_pcm_hardware hw; |
322 | struct snd_pcm_hw_constraints hw_constraints; | |
1da177e4 LT |
323 | |
324 | /* -- interrupt callbacks -- */ | |
877211f5 TI |
325 | void (*transfer_ack_begin)(struct snd_pcm_substream *substream); |
326 | void (*transfer_ack_end)(struct snd_pcm_substream *substream); | |
1da177e4 LT |
327 | |
328 | /* -- timer -- */ | |
329 | unsigned int timer_resolution; /* timer resolution */ | |
b751eef1 | 330 | int tstamp_type; /* timestamp type */ |
1da177e4 LT |
331 | |
332 | /* -- DMA -- */ | |
333 | unsigned char *dma_area; /* DMA area */ | |
334 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ | |
335 | size_t dma_bytes; /* size of DMA area */ | |
336 | ||
337 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ | |
338 | ||
339 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
340 | /* -- OSS things -- */ | |
877211f5 | 341 | struct snd_pcm_oss_runtime oss; |
1da177e4 LT |
342 | #endif |
343 | }; | |
344 | ||
877211f5 | 345 | struct snd_pcm_group { /* keep linked substreams */ |
1da177e4 LT |
346 | spinlock_t lock; |
347 | struct list_head substreams; | |
348 | int count; | |
877211f5 | 349 | }; |
1da177e4 | 350 | |
e7373b70 CL |
351 | struct pid; |
352 | ||
877211f5 TI |
353 | struct snd_pcm_substream { |
354 | struct snd_pcm *pcm; | |
355 | struct snd_pcm_str *pstr; | |
1da177e4 LT |
356 | void *private_data; /* copied from pcm->private_data */ |
357 | int number; | |
358 | char name[32]; /* substream name */ | |
359 | int stream; /* stream (direction) */ | |
9442e691 | 360 | char latency_id[20]; /* latency identifier */ |
1da177e4 LT |
361 | size_t buffer_bytes_max; /* limit ring buffer size */ |
362 | struct snd_dma_buffer dma_buffer; | |
363 | unsigned int dma_buf_id; | |
364 | size_t dma_max; | |
365 | /* -- hardware operations -- */ | |
877211f5 | 366 | struct snd_pcm_ops *ops; |
1da177e4 | 367 | /* -- runtime information -- */ |
877211f5 | 368 | struct snd_pcm_runtime *runtime; |
1da177e4 | 369 | /* -- timer section -- */ |
877211f5 | 370 | struct snd_timer *timer; /* timer */ |
1da177e4 | 371 | unsigned timer_running: 1; /* time is running */ |
1da177e4 | 372 | /* -- next substream -- */ |
877211f5 | 373 | struct snd_pcm_substream *next; |
1da177e4 LT |
374 | /* -- linked substreams -- */ |
375 | struct list_head link_list; /* linked list member */ | |
877211f5 TI |
376 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ |
377 | struct snd_pcm_group *group; /* pointer to current group */ | |
1da177e4 | 378 | /* -- assigned files -- */ |
1576274d | 379 | void *file; |
0df63e44 | 380 | int ref_count; |
9c323fcb | 381 | atomic_t mmap_count; |
0df63e44 | 382 | unsigned int f_flags; |
3bf75f9b | 383 | void (*pcm_release)(struct snd_pcm_substream *); |
e7373b70 | 384 | struct pid *pid; |
1da177e4 LT |
385 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
386 | /* -- OSS things -- */ | |
877211f5 | 387 | struct snd_pcm_oss_substream oss; |
1da177e4 | 388 | #endif |
b7d90a35 | 389 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
390 | struct snd_info_entry *proc_root; |
391 | struct snd_info_entry *proc_info_entry; | |
392 | struct snd_info_entry *proc_hw_params_entry; | |
393 | struct snd_info_entry *proc_sw_params_entry; | |
394 | struct snd_info_entry *proc_status_entry; | |
395 | struct snd_info_entry *proc_prealloc_entry; | |
c7132aeb | 396 | struct snd_info_entry *proc_prealloc_max_entry; |
b7d90a35 | 397 | #endif |
1da177e4 | 398 | /* misc flags */ |
3bf75f9b | 399 | unsigned int hw_opened: 1; |
1da177e4 LT |
400 | }; |
401 | ||
0df63e44 | 402 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
1da177e4 LT |
403 | |
404 | ||
877211f5 | 405 | struct snd_pcm_str { |
1da177e4 | 406 | int stream; /* stream (direction) */ |
877211f5 | 407 | struct snd_pcm *pcm; |
1da177e4 LT |
408 | /* -- substreams -- */ |
409 | unsigned int substream_count; | |
410 | unsigned int substream_opened; | |
877211f5 | 411 | struct snd_pcm_substream *substream; |
1da177e4 LT |
412 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
413 | /* -- OSS things -- */ | |
877211f5 | 414 | struct snd_pcm_oss_stream oss; |
1da177e4 | 415 | #endif |
b7d90a35 | 416 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
417 | struct snd_info_entry *proc_root; |
418 | struct snd_info_entry *proc_info_entry; | |
b7d90a35 | 419 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
1da177e4 | 420 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ |
877211f5 | 421 | struct snd_info_entry *proc_xrun_debug_entry; |
1da177e4 | 422 | #endif |
b7d90a35 | 423 | #endif |
1da177e4 LT |
424 | }; |
425 | ||
877211f5 TI |
426 | struct snd_pcm { |
427 | struct snd_card *card; | |
f87135f5 | 428 | struct list_head list; |
f90c06a2 | 429 | int device; /* device number */ |
1da177e4 LT |
430 | unsigned int info_flags; |
431 | unsigned short dev_class; | |
432 | unsigned short dev_subclass; | |
433 | char id[64]; | |
434 | char name[80]; | |
877211f5 | 435 | struct snd_pcm_str streams[2]; |
1a60d4c5 | 436 | struct mutex open_mutex; |
1da177e4 LT |
437 | wait_queue_head_t open_wait; |
438 | void *private_data; | |
877211f5 | 439 | void (*private_free) (struct snd_pcm *pcm); |
c78085fc | 440 | struct device *dev; /* actual hw device this belongs to */ |
1da177e4 | 441 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 442 | struct snd_pcm_oss oss; |
1da177e4 LT |
443 | #endif |
444 | }; | |
445 | ||
877211f5 TI |
446 | struct snd_pcm_notify { |
447 | int (*n_register) (struct snd_pcm * pcm); | |
448 | int (*n_disconnect) (struct snd_pcm * pcm); | |
449 | int (*n_unregister) (struct snd_pcm * pcm); | |
1da177e4 | 450 | struct list_head list; |
877211f5 | 451 | }; |
1da177e4 LT |
452 | |
453 | /* | |
454 | * Registering | |
455 | */ | |
456 | ||
54047320 | 457 | extern const struct file_operations snd_pcm_f_ops[2]; |
1da177e4 | 458 | |
e6161653 | 459 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
1da177e4 | 460 | int playback_count, int capture_count, |
877211f5 TI |
461 | struct snd_pcm **rpcm); |
462 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); | |
1da177e4 | 463 | |
877211f5 | 464 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
1da177e4 LT |
465 | |
466 | /* | |
467 | * Native I/O | |
468 | */ | |
469 | ||
470 | extern rwlock_t snd_pcm_link_rwlock; | |
471 | ||
877211f5 TI |
472 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
473 | int snd_pcm_info_user(struct snd_pcm_substream *substream, | |
474 | struct snd_pcm_info __user *info); | |
475 | int snd_pcm_status(struct snd_pcm_substream *substream, | |
476 | struct snd_pcm_status *status); | |
877211f5 TI |
477 | int snd_pcm_start(struct snd_pcm_substream *substream); |
478 | int snd_pcm_stop(struct snd_pcm_substream *substream, int status); | |
479 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); | |
1da177e4 | 480 | #ifdef CONFIG_PM |
877211f5 TI |
481 | int snd_pcm_suspend(struct snd_pcm_substream *substream); |
482 | int snd_pcm_suspend_all(struct snd_pcm *pcm); | |
1da177e4 | 483 | #endif |
877211f5 | 484 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); |
3bf75f9b TI |
485 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, |
486 | struct snd_pcm_substream **rsubstream); | |
877211f5 | 487 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); |
3bf75f9b TI |
488 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, |
489 | struct snd_pcm_substream **rsubstream); | |
490 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); | |
1da177e4 | 491 | void snd_pcm_vma_notify_data(void *client, void *data); |
877211f5 | 492 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); |
1da177e4 | 493 | |
1da177e4 LT |
494 | /* |
495 | * PCM library | |
496 | */ | |
497 | ||
877211f5 | 498 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) |
1da177e4 LT |
499 | { |
500 | return substream->group != &substream->self_group; | |
501 | } | |
502 | ||
877211f5 | 503 | static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
1da177e4 LT |
504 | { |
505 | read_lock(&snd_pcm_link_rwlock); | |
506 | spin_lock(&substream->self_group.lock); | |
507 | } | |
508 | ||
877211f5 | 509 | static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
1da177e4 LT |
510 | { |
511 | spin_unlock(&substream->self_group.lock); | |
512 | read_unlock(&snd_pcm_link_rwlock); | |
513 | } | |
514 | ||
877211f5 | 515 | static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
1da177e4 LT |
516 | { |
517 | read_lock_irq(&snd_pcm_link_rwlock); | |
518 | spin_lock(&substream->self_group.lock); | |
519 | } | |
520 | ||
877211f5 | 521 | static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
1da177e4 LT |
522 | { |
523 | spin_unlock(&substream->self_group.lock); | |
524 | read_unlock_irq(&snd_pcm_link_rwlock); | |
525 | } | |
526 | ||
527 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ | |
528 | do { \ | |
529 | read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ | |
530 | spin_lock(&substream->self_group.lock); \ | |
531 | } while (0) | |
532 | ||
533 | #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ | |
534 | do { \ | |
535 | spin_unlock(&substream->self_group.lock); \ | |
536 | read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ | |
537 | } while (0) | |
538 | ||
ef991b95 TI |
539 | #define snd_pcm_group_for_each_entry(s, substream) \ |
540 | list_for_each_entry(s, &substream->group->substreams, link_list) | |
1da177e4 | 541 | |
877211f5 | 542 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
1da177e4 LT |
543 | { |
544 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
545 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
546 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); | |
547 | } | |
548 | ||
877211f5 | 549 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
550 | { |
551 | return size * 8 / runtime->sample_bits; | |
552 | } | |
553 | ||
877211f5 | 554 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
555 | { |
556 | return size * 8 / runtime->frame_bits; | |
557 | } | |
558 | ||
877211f5 | 559 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
560 | { |
561 | return size * runtime->sample_bits / 8; | |
562 | } | |
563 | ||
877211f5 | 564 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
1da177e4 LT |
565 | { |
566 | return size * runtime->frame_bits / 8; | |
567 | } | |
568 | ||
877211f5 | 569 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
1da177e4 LT |
570 | { |
571 | return bytes % runtime->byte_align == 0; | |
572 | } | |
573 | ||
877211f5 | 574 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 575 | { |
877211f5 | 576 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
577 | return frames_to_bytes(runtime, runtime->buffer_size); |
578 | } | |
579 | ||
877211f5 | 580 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 581 | { |
877211f5 | 582 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
583 | return frames_to_bytes(runtime, runtime->period_size); |
584 | } | |
585 | ||
586 | /* | |
587 | * result is: 0 ... (boundary - 1) | |
588 | */ | |
877211f5 | 589 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
590 | { |
591 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; | |
592 | if (avail < 0) | |
593 | avail += runtime->boundary; | |
594 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) | |
595 | avail -= runtime->boundary; | |
596 | return avail; | |
597 | } | |
598 | ||
599 | /* | |
600 | * result is: 0 ... (boundary - 1) | |
601 | */ | |
877211f5 | 602 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
603 | { |
604 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; | |
605 | if (avail < 0) | |
606 | avail += runtime->boundary; | |
607 | return avail; | |
608 | } | |
609 | ||
877211f5 | 610 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
611 | { |
612 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); | |
613 | } | |
614 | ||
877211f5 | 615 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
616 | { |
617 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); | |
618 | } | |
619 | ||
620 | /** | |
621 | * snd_pcm_playback_ready - check whether the playback buffer is available | |
622 | * @substream: the pcm substream instance | |
623 | * | |
624 | * Checks whether enough free space is available on the playback buffer. | |
625 | * | |
626 | * Returns non-zero if available, or zero if not. | |
627 | */ | |
877211f5 | 628 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
1da177e4 | 629 | { |
877211f5 | 630 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
631 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
632 | } | |
633 | ||
634 | /** | |
635 | * snd_pcm_capture_ready - check whether the capture buffer is available | |
636 | * @substream: the pcm substream instance | |
637 | * | |
638 | * Checks whether enough capture data is available on the capture buffer. | |
639 | * | |
640 | * Returns non-zero if available, or zero if not. | |
641 | */ | |
877211f5 | 642 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
1da177e4 | 643 | { |
877211f5 | 644 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
645 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
646 | } | |
647 | ||
648 | /** | |
649 | * snd_pcm_playback_data - check whether any data exists on the playback buffer | |
650 | * @substream: the pcm substream instance | |
651 | * | |
652 | * Checks whether any data exists on the playback buffer. If stop_threshold | |
653 | * is bigger or equal to boundary, then this function returns always non-zero. | |
654 | * | |
655 | * Returns non-zero if exists, or zero if not. | |
656 | */ | |
877211f5 | 657 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
1da177e4 | 658 | { |
877211f5 | 659 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
660 | |
661 | if (runtime->stop_threshold >= runtime->boundary) | |
662 | return 1; | |
663 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; | |
664 | } | |
665 | ||
666 | /** | |
667 | * snd_pcm_playback_empty - check whether the playback buffer is empty | |
668 | * @substream: the pcm substream instance | |
669 | * | |
670 | * Checks whether the playback buffer is empty. | |
671 | * | |
672 | * Returns non-zero if empty, or zero if not. | |
673 | */ | |
877211f5 | 674 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
1da177e4 | 675 | { |
877211f5 | 676 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
677 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
678 | } | |
679 | ||
680 | /** | |
681 | * snd_pcm_capture_empty - check whether the capture buffer is empty | |
682 | * @substream: the pcm substream instance | |
683 | * | |
684 | * Checks whether the capture buffer is empty. | |
685 | * | |
686 | * Returns non-zero if empty, or zero if not. | |
687 | */ | |
877211f5 | 688 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
1da177e4 | 689 | { |
877211f5 | 690 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
691 | return snd_pcm_capture_avail(runtime) == 0; |
692 | } | |
693 | ||
877211f5 TI |
694 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
695 | struct snd_pcm_substream *master) | |
1da177e4 LT |
696 | { |
697 | substream->runtime->trigger_master = master; | |
698 | } | |
699 | ||
700 | static inline int hw_is_mask(int var) | |
701 | { | |
702 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && | |
703 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; | |
704 | } | |
705 | ||
706 | static inline int hw_is_interval(int var) | |
707 | { | |
708 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && | |
709 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; | |
710 | } | |
711 | ||
877211f5 | 712 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
1da177e4 LT |
713 | snd_pcm_hw_param_t var) |
714 | { | |
715 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
716 | } | |
717 | ||
877211f5 | 718 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
1da177e4 LT |
719 | snd_pcm_hw_param_t var) |
720 | { | |
721 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
722 | } | |
723 | ||
877211f5 | 724 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
725 | snd_pcm_hw_param_t var) |
726 | { | |
b9f09a48 | 727 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
1da177e4 LT |
728 | } |
729 | ||
877211f5 | 730 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
731 | snd_pcm_hw_param_t var) |
732 | { | |
b9f09a48 | 733 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
1da177e4 LT |
734 | } |
735 | ||
736 | #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) | |
737 | #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) | |
738 | #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) | |
739 | #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min | |
740 | #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min | |
741 | #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min | |
742 | #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) | |
743 | #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min | |
744 | #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min | |
745 | #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min | |
1da177e4 LT |
746 | |
747 | ||
877211f5 TI |
748 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
749 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
750 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
751 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, | |
752 | unsigned int k, struct snd_interval *c); | |
753 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, | |
754 | const struct snd_interval *b, struct snd_interval *c); | |
755 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); | |
756 | int snd_interval_ratnum(struct snd_interval *i, | |
757 | unsigned int rats_count, struct snd_ratnum *rats, | |
1da177e4 LT |
758 | unsigned int *nump, unsigned int *denp); |
759 | ||
877211f5 TI |
760 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
761 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); | |
877211f5 | 762 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 763 | |
877211f5 | 764 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 765 | |
877211f5 TI |
766 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
767 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); | |
1da177e4 | 768 | |
877211f5 | 769 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 770 | u_int32_t mask); |
877211f5 | 771 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 772 | u_int64_t mask); |
877211f5 | 773 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 774 | unsigned int min, unsigned int max); |
877211f5 TI |
775 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
776 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
777 | unsigned int cond, |
778 | snd_pcm_hw_param_t var, | |
877211f5 TI |
779 | struct snd_pcm_hw_constraint_list *l); |
780 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
781 | unsigned int cond, |
782 | snd_pcm_hw_param_t var, | |
877211f5 TI |
783 | struct snd_pcm_hw_constraint_ratnums *r); |
784 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
785 | unsigned int cond, |
786 | snd_pcm_hw_param_t var, | |
877211f5 TI |
787 | struct snd_pcm_hw_constraint_ratdens *r); |
788 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
789 | unsigned int cond, |
790 | unsigned int width, | |
791 | unsigned int msbits); | |
877211f5 | 792 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
793 | unsigned int cond, |
794 | snd_pcm_hw_param_t var, | |
795 | unsigned long step); | |
877211f5 | 796 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
797 | unsigned int cond, |
798 | snd_pcm_hw_param_t var); | |
877211f5 | 799 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
800 | unsigned int cond, |
801 | int var, | |
802 | snd_pcm_hw_rule_func_t func, void *private, | |
803 | int dep, ...); | |
804 | ||
805 | int snd_pcm_format_signed(snd_pcm_format_t format); | |
806 | int snd_pcm_format_unsigned(snd_pcm_format_t format); | |
807 | int snd_pcm_format_linear(snd_pcm_format_t format); | |
808 | int snd_pcm_format_little_endian(snd_pcm_format_t format); | |
809 | int snd_pcm_format_big_endian(snd_pcm_format_t format); | |
1b44c28d TI |
810 | #if 0 /* just for DocBook */ |
811 | /** | |
9502dcad TI |
812 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
813 | * @format: the format to check | |
814 | * | |
815 | * Returns 1 if the given PCM format is CPU-endian, 0 if | |
816 | * opposite, or a negative error code if endian not specified. | |
817 | */ | |
8cdfd251 | 818 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
1b44c28d | 819 | #endif /* DocBook */ |
9502dcad | 820 | #ifdef SNDRV_LITTLE_ENDIAN |
9d01a82e | 821 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
9502dcad | 822 | #else |
9d01a82e | 823 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
9502dcad | 824 | #endif |
1da177e4 LT |
825 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
826 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ | |
9502dcad | 827 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
1da177e4 LT |
828 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
829 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); | |
830 | snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); | |
1da177e4 | 831 | |
877211f5 TI |
832 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); |
833 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); | |
834 | int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); | |
835 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, | |
1da177e4 | 836 | unsigned int cmd, void *arg); |
877211f5 TI |
837 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
838 | int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); | |
839 | int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); | |
840 | int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); | |
841 | int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); | |
842 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); | |
877211f5 TI |
843 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); |
844 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, | |
1da177e4 LT |
845 | const void __user *buf, |
846 | snd_pcm_uframes_t frames); | |
877211f5 | 847 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
1da177e4 | 848 | void __user *buf, snd_pcm_uframes_t frames); |
877211f5 | 849 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 | 850 | void __user **bufs, snd_pcm_uframes_t frames); |
877211f5 | 851 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
852 | void __user **bufs, snd_pcm_uframes_t frames); |
853 | ||
7653d557 CL |
854 | extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; |
855 | ||
877211f5 | 856 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
918f3a0e | 857 | unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); |
1da177e4 | 858 | |
877211f5 | 859 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
1da177e4 LT |
860 | struct snd_dma_buffer *bufp) |
861 | { | |
877211f5 | 862 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
863 | if (bufp) { |
864 | runtime->dma_buffer_p = bufp; | |
865 | runtime->dma_area = bufp->area; | |
866 | runtime->dma_addr = bufp->addr; | |
867 | runtime->dma_bytes = bufp->bytes; | |
868 | } else { | |
869 | runtime->dma_buffer_p = NULL; | |
870 | runtime->dma_area = NULL; | |
871 | runtime->dma_addr = 0; | |
872 | runtime->dma_bytes = 0; | |
873 | } | |
874 | } | |
875 | ||
876 | /* | |
877 | * Timer interface | |
878 | */ | |
879 | ||
877211f5 TI |
880 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
881 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); | |
882 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); | |
1da177e4 | 883 | |
b751eef1 JK |
884 | static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, |
885 | struct timespec *tv) | |
886 | { | |
887 | if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) | |
888 | do_posix_clock_monotonic_gettime(tv); | |
889 | else | |
890 | getnstimeofday(tv); | |
891 | } | |
892 | ||
1da177e4 LT |
893 | /* |
894 | * Memory | |
895 | */ | |
896 | ||
877211f5 TI |
897 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
898 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); | |
899 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, | |
1da177e4 LT |
900 | int type, struct device *data, |
901 | size_t size, size_t max); | |
877211f5 | 902 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
1da177e4 LT |
903 | int type, void *data, |
904 | size_t size, size_t max); | |
877211f5 TI |
905 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
906 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); | |
1da177e4 | 907 | |
cc6a8acd | 908 | #ifdef CONFIG_SND_DMA_SGBUF |
77a23f26 TI |
909 | /* |
910 | * SG-buffer handling | |
911 | */ | |
912 | #define snd_pcm_substream_sgbuf(substream) \ | |
913 | ((substream)->runtime->dma_buffer_p->private_data) | |
914 | ||
915 | static inline dma_addr_t | |
916 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) | |
917 | { | |
918 | struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); | |
919 | return snd_sgbuf_get_addr(sg, ofs); | |
920 | } | |
921 | ||
922 | static inline void * | |
923 | snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) | |
924 | { | |
925 | struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); | |
926 | return snd_sgbuf_get_ptr(sg, ofs); | |
927 | } | |
928 | ||
929 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, | |
930 | unsigned long offset); | |
51e9f2e6 TI |
931 | unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, |
932 | unsigned int ofs, unsigned int size); | |
1da177e4 | 933 | |
cc6a8acd TI |
934 | #else /* !SND_DMA_SGBUF */ |
935 | /* | |
936 | * fake using a continuous buffer | |
937 | */ | |
938 | static inline dma_addr_t | |
939 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) | |
940 | { | |
941 | return substream->runtime->dma_addr + ofs; | |
942 | } | |
943 | ||
944 | static inline void * | |
945 | snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) | |
946 | { | |
947 | return substream->runtime->dma_area + ofs; | |
948 | } | |
949 | ||
950 | #define snd_pcm_sgbuf_ops_page NULL | |
951 | ||
952 | #define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size) | |
953 | ||
954 | #endif /* SND_DMA_SGBUF */ | |
955 | ||
1da177e4 LT |
956 | /* handle mmap counter - PCM mmap callback should handle this counter properly */ |
957 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) | |
958 | { | |
877211f5 | 959 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 960 | atomic_inc(&substream->mmap_count); |
1da177e4 LT |
961 | } |
962 | ||
963 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) | |
964 | { | |
877211f5 | 965 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 966 | atomic_dec(&substream->mmap_count); |
1da177e4 LT |
967 | } |
968 | ||
969 | /* mmap for io-memory area */ | |
970 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
971 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP | |
877211f5 | 972 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
1da177e4 LT |
973 | #else |
974 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 | |
975 | #define snd_pcm_lib_mmap_iomem NULL | |
976 | #endif | |
977 | ||
978 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) | |
979 | { | |
980 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; | |
981 | } | |
982 | ||
983 | /* | |
984 | * Misc | |
985 | */ | |
986 | ||
987 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ | |
988 | (IEC958_AES1_CON_ORIGINAL<<8)|\ | |
989 | (IEC958_AES1_CON_PCM_CODER<<8)|\ | |
990 | (IEC958_AES3_CON_FS_48000<<24)) | |
991 | ||
7eaa943c TI |
992 | #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) |
993 | ||
6e5265ec TI |
994 | const char *snd_pcm_format_name(snd_pcm_format_t format); |
995 | ||
1da177e4 | 996 | #endif /* __SOUND_PCM_H */ |