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> | |
28 | #include <linux/poll.h> | |
f23f6e08 | 29 | #include <linux/mm.h> |
1da177e4 LT |
30 | #include <linux/bitops.h> |
31 | ||
1da177e4 LT |
32 | #define snd_pcm_substream_chip(substream) ((substream)->private_data) |
33 | #define snd_pcm_chip(pcm) ((pcm)->private_data) | |
34 | ||
1da177e4 LT |
35 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
36 | #include "pcm_oss.h" | |
37 | #endif | |
38 | ||
39 | /* | |
40 | * Hardware (lowlevel) section | |
41 | */ | |
42 | ||
877211f5 | 43 | struct snd_pcm_hardware { |
1da177e4 LT |
44 | unsigned int info; /* SNDRV_PCM_INFO_* */ |
45 | u64 formats; /* SNDRV_PCM_FMTBIT_* */ | |
46 | unsigned int rates; /* SNDRV_PCM_RATE_* */ | |
47 | unsigned int rate_min; /* min rate */ | |
48 | unsigned int rate_max; /* max rate */ | |
49 | unsigned int channels_min; /* min channels */ | |
50 | unsigned int channels_max; /* max channels */ | |
51 | size_t buffer_bytes_max; /* max buffer size */ | |
52 | size_t period_bytes_min; /* min period size */ | |
53 | size_t period_bytes_max; /* max period size */ | |
54 | unsigned int periods_min; /* min # of periods */ | |
55 | unsigned int periods_max; /* max # of periods */ | |
56 | size_t fifo_size; /* fifo size in bytes */ | |
877211f5 | 57 | }; |
1da177e4 | 58 | |
e0e6ce03 RD |
59 | struct snd_pcm_substream; |
60 | ||
877211f5 TI |
61 | struct snd_pcm_ops { |
62 | int (*open)(struct snd_pcm_substream *substream); | |
63 | int (*close)(struct snd_pcm_substream *substream); | |
64 | int (*ioctl)(struct snd_pcm_substream * substream, | |
1da177e4 | 65 | unsigned int cmd, void *arg); |
877211f5 TI |
66 | int (*hw_params)(struct snd_pcm_substream *substream, |
67 | struct snd_pcm_hw_params *params); | |
68 | int (*hw_free)(struct snd_pcm_substream *substream); | |
69 | int (*prepare)(struct snd_pcm_substream *substream); | |
70 | int (*trigger)(struct snd_pcm_substream *substream, int cmd); | |
71 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); | |
72 | int (*copy)(struct snd_pcm_substream *substream, int channel, | |
73 | snd_pcm_uframes_t pos, | |
1da177e4 | 74 | void __user *buf, snd_pcm_uframes_t count); |
877211f5 | 75 | int (*silence)(struct snd_pcm_substream *substream, int channel, |
1da177e4 | 76 | snd_pcm_uframes_t pos, snd_pcm_uframes_t count); |
877211f5 TI |
77 | struct page *(*page)(struct snd_pcm_substream *substream, |
78 | unsigned long offset); | |
79 | int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); | |
80 | int (*ack)(struct snd_pcm_substream *substream); | |
81 | }; | |
1da177e4 LT |
82 | |
83 | /* | |
84 | * | |
85 | */ | |
86 | ||
87 | #define SNDRV_PCM_DEVICES 8 | |
88 | ||
89 | #define SNDRV_PCM_IOCTL1_FALSE ((void *)0) | |
90 | #define SNDRV_PCM_IOCTL1_TRUE ((void *)1) | |
91 | ||
92 | #define SNDRV_PCM_IOCTL1_RESET 0 | |
93 | #define SNDRV_PCM_IOCTL1_INFO 1 | |
94 | #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 | |
95 | #define SNDRV_PCM_IOCTL1_GSTATE 3 | |
96 | ||
97 | #define SNDRV_PCM_TRIGGER_STOP 0 | |
98 | #define SNDRV_PCM_TRIGGER_START 1 | |
99 | #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 | |
100 | #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 | |
101 | #define SNDRV_PCM_TRIGGER_SUSPEND 5 | |
102 | #define SNDRV_PCM_TRIGGER_RESUME 6 | |
103 | ||
104 | #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) | |
105 | ||
106 | /* If you change this don't forget to change rates[] table in pcm_native.c */ | |
107 | #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ | |
108 | #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ | |
109 | #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ | |
110 | #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ | |
111 | #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ | |
112 | #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ | |
113 | #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ | |
114 | #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ | |
115 | #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ | |
116 | #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ | |
117 | #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ | |
118 | #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ | |
119 | #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ | |
120 | ||
121 | #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ | |
122 | #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ | |
123 | ||
124 | #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ | |
125 | SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ | |
126 | SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) | |
127 | #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) | |
128 | #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ | |
129 | SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) | |
130 | #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ | |
131 | SNDRV_PCM_RATE_192000) | |
132 | #define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8) | |
133 | #define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8) | |
134 | #define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE) | |
135 | #define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE) | |
136 | #define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE) | |
137 | #define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE) | |
138 | #define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE) | |
139 | #define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE) | |
140 | #define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE) | |
141 | #define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE) | |
142 | #define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE) | |
143 | #define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE) | |
144 | #define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE) | |
145 | #define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE) | |
146 | #define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE) | |
147 | #define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE) | |
148 | #define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE) | |
149 | #define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE) | |
150 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE) | |
151 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE) | |
152 | #define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW) | |
153 | #define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW) | |
154 | #define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM) | |
155 | #define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG) | |
156 | #define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM) | |
157 | #define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL) | |
158 | #define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE) | |
159 | #define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE) | |
160 | #define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE) | |
161 | #define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE) | |
162 | #define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE) | |
163 | #define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE) | |
164 | #define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE) | |
165 | #define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE) | |
166 | #define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE) | |
167 | #define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE) | |
168 | #define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE) | |
169 | #define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE) | |
170 | ||
171 | #ifdef SNDRV_LITTLE_ENDIAN | |
172 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE | |
173 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE | |
174 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE | |
175 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE | |
176 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE | |
177 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE | |
178 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE | |
179 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE | |
180 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | |
181 | #endif | |
182 | #ifdef SNDRV_BIG_ENDIAN | |
183 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE | |
184 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE | |
185 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE | |
186 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE | |
187 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE | |
188 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE | |
189 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE | |
190 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE | |
191 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE | |
192 | #endif | |
193 | ||
877211f5 TI |
194 | struct snd_pcm_file { |
195 | struct snd_pcm_substream *substream; | |
548a648b | 196 | int no_compat_mmap; |
1da177e4 LT |
197 | }; |
198 | ||
877211f5 TI |
199 | struct snd_pcm_hw_rule; |
200 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, | |
201 | struct snd_pcm_hw_rule *rule); | |
1da177e4 | 202 | |
877211f5 | 203 | struct snd_pcm_hw_rule { |
1da177e4 LT |
204 | unsigned int cond; |
205 | snd_pcm_hw_rule_func_t func; | |
206 | int var; | |
207 | int deps[4]; | |
208 | void *private; | |
209 | }; | |
210 | ||
877211f5 TI |
211 | struct snd_pcm_hw_constraints { |
212 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - | |
1da177e4 | 213 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
877211f5 | 214 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
1da177e4 LT |
215 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
216 | unsigned int rules_num; | |
217 | unsigned int rules_all; | |
877211f5 TI |
218 | struct snd_pcm_hw_rule *rules; |
219 | }; | |
1da177e4 | 220 | |
877211f5 TI |
221 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
222 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
223 | { |
224 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
225 | } | |
226 | ||
877211f5 TI |
227 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
228 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
229 | { |
230 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
231 | } | |
232 | ||
877211f5 | 233 | struct snd_ratnum { |
1da177e4 LT |
234 | unsigned int num; |
235 | unsigned int den_min, den_max, den_step; | |
877211f5 | 236 | }; |
1da177e4 | 237 | |
877211f5 | 238 | struct snd_ratden { |
1da177e4 LT |
239 | unsigned int num_min, num_max, num_step; |
240 | unsigned int den; | |
877211f5 | 241 | }; |
1da177e4 | 242 | |
877211f5 | 243 | struct snd_pcm_hw_constraint_ratnums { |
1da177e4 | 244 | int nrats; |
877211f5 TI |
245 | struct snd_ratnum *rats; |
246 | }; | |
1da177e4 | 247 | |
877211f5 | 248 | struct snd_pcm_hw_constraint_ratdens { |
1da177e4 | 249 | int nrats; |
877211f5 TI |
250 | struct snd_ratden *rats; |
251 | }; | |
1da177e4 | 252 | |
877211f5 | 253 | struct snd_pcm_hw_constraint_list { |
1da177e4 LT |
254 | unsigned int count; |
255 | unsigned int *list; | |
256 | unsigned int mask; | |
877211f5 | 257 | }; |
1da177e4 | 258 | |
877211f5 | 259 | struct snd_pcm_runtime { |
1da177e4 | 260 | /* -- Status -- */ |
877211f5 | 261 | struct snd_pcm_substream *trigger_master; |
07799e75 | 262 | struct timespec trigger_tstamp; /* trigger timestamp */ |
1da177e4 LT |
263 | int overrange; |
264 | snd_pcm_uframes_t avail_max; | |
265 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ | |
266 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/ | |
267 | ||
268 | /* -- HW params -- */ | |
269 | snd_pcm_access_t access; /* access mode */ | |
270 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ | |
271 | snd_pcm_subformat_t subformat; /* subformat */ | |
272 | unsigned int rate; /* rate in Hz */ | |
273 | unsigned int channels; /* channels */ | |
274 | snd_pcm_uframes_t period_size; /* period size */ | |
275 | unsigned int periods; /* periods */ | |
276 | snd_pcm_uframes_t buffer_size; /* buffer size */ | |
1da177e4 LT |
277 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ |
278 | size_t byte_align; | |
279 | unsigned int frame_bits; | |
280 | unsigned int sample_bits; | |
281 | unsigned int info; | |
282 | unsigned int rate_num; | |
283 | unsigned int rate_den; | |
284 | ||
285 | /* -- SW params -- */ | |
877211f5 | 286 | int tstamp_mode; /* mmap timestamp is updated */ |
1da177e4 | 287 | unsigned int period_step; |
1da177e4 LT |
288 | snd_pcm_uframes_t start_threshold; |
289 | snd_pcm_uframes_t stop_threshold; | |
290 | snd_pcm_uframes_t silence_threshold; /* Silence filling happens when | |
291 | noise is nearest than this */ | |
292 | snd_pcm_uframes_t silence_size; /* Silence filling size */ | |
293 | snd_pcm_uframes_t boundary; /* pointers wrap point */ | |
294 | ||
295 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ | |
296 | snd_pcm_uframes_t silence_filled; /* size filled with silence */ | |
297 | ||
877211f5 | 298 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ |
1da177e4 LT |
299 | |
300 | /* -- mmap -- */ | |
503fc85a TI |
301 | struct snd_pcm_mmap_status *status; |
302 | struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
303 | |
304 | /* -- locking / scheduling -- */ | |
305 | wait_queue_head_t sleep; | |
1da177e4 LT |
306 | struct fasync_struct *fasync; |
307 | ||
308 | /* -- private section -- */ | |
309 | void *private_data; | |
877211f5 | 310 | void (*private_free)(struct snd_pcm_runtime *runtime); |
1da177e4 LT |
311 | |
312 | /* -- hardware description -- */ | |
877211f5 TI |
313 | struct snd_pcm_hardware hw; |
314 | struct snd_pcm_hw_constraints hw_constraints; | |
1da177e4 LT |
315 | |
316 | /* -- interrupt callbacks -- */ | |
877211f5 TI |
317 | void (*transfer_ack_begin)(struct snd_pcm_substream *substream); |
318 | void (*transfer_ack_end)(struct snd_pcm_substream *substream); | |
1da177e4 LT |
319 | |
320 | /* -- timer -- */ | |
321 | unsigned int timer_resolution; /* timer resolution */ | |
b751eef1 | 322 | int tstamp_type; /* timestamp type */ |
1da177e4 LT |
323 | |
324 | /* -- DMA -- */ | |
325 | unsigned char *dma_area; /* DMA area */ | |
326 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ | |
327 | size_t dma_bytes; /* size of DMA area */ | |
328 | ||
329 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ | |
330 | ||
331 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
332 | /* -- OSS things -- */ | |
877211f5 | 333 | struct snd_pcm_oss_runtime oss; |
1da177e4 LT |
334 | #endif |
335 | }; | |
336 | ||
877211f5 | 337 | struct snd_pcm_group { /* keep linked substreams */ |
1da177e4 LT |
338 | spinlock_t lock; |
339 | struct list_head substreams; | |
340 | int count; | |
877211f5 | 341 | }; |
1da177e4 | 342 | |
877211f5 TI |
343 | struct snd_pcm_substream { |
344 | struct snd_pcm *pcm; | |
345 | struct snd_pcm_str *pstr; | |
1da177e4 LT |
346 | void *private_data; /* copied from pcm->private_data */ |
347 | int number; | |
348 | char name[32]; /* substream name */ | |
349 | int stream; /* stream (direction) */ | |
9442e691 | 350 | char latency_id[20]; /* latency identifier */ |
1da177e4 LT |
351 | size_t buffer_bytes_max; /* limit ring buffer size */ |
352 | struct snd_dma_buffer dma_buffer; | |
353 | unsigned int dma_buf_id; | |
354 | size_t dma_max; | |
355 | /* -- hardware operations -- */ | |
877211f5 | 356 | struct snd_pcm_ops *ops; |
1da177e4 | 357 | /* -- runtime information -- */ |
877211f5 | 358 | struct snd_pcm_runtime *runtime; |
1da177e4 | 359 | /* -- timer section -- */ |
877211f5 | 360 | struct snd_timer *timer; /* timer */ |
1da177e4 LT |
361 | unsigned timer_running: 1; /* time is running */ |
362 | spinlock_t timer_lock; | |
363 | /* -- next substream -- */ | |
877211f5 | 364 | struct snd_pcm_substream *next; |
1da177e4 LT |
365 | /* -- linked substreams -- */ |
366 | struct list_head link_list; /* linked list member */ | |
877211f5 TI |
367 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ |
368 | struct snd_pcm_group *group; /* pointer to current group */ | |
1da177e4 | 369 | /* -- assigned files -- */ |
1576274d | 370 | void *file; |
0df63e44 | 371 | int ref_count; |
9c323fcb | 372 | atomic_t mmap_count; |
0df63e44 | 373 | unsigned int f_flags; |
3bf75f9b | 374 | void (*pcm_release)(struct snd_pcm_substream *); |
1da177e4 LT |
375 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
376 | /* -- OSS things -- */ | |
877211f5 | 377 | struct snd_pcm_oss_substream oss; |
1da177e4 | 378 | #endif |
b7d90a35 | 379 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
380 | struct snd_info_entry *proc_root; |
381 | struct snd_info_entry *proc_info_entry; | |
382 | struct snd_info_entry *proc_hw_params_entry; | |
383 | struct snd_info_entry *proc_sw_params_entry; | |
384 | struct snd_info_entry *proc_status_entry; | |
385 | struct snd_info_entry *proc_prealloc_entry; | |
c7132aeb | 386 | struct snd_info_entry *proc_prealloc_max_entry; |
b7d90a35 | 387 | #endif |
1da177e4 | 388 | /* misc flags */ |
3bf75f9b | 389 | unsigned int hw_opened: 1; |
1da177e4 LT |
390 | }; |
391 | ||
0df63e44 | 392 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
1da177e4 LT |
393 | |
394 | ||
877211f5 | 395 | struct snd_pcm_str { |
1da177e4 | 396 | int stream; /* stream (direction) */ |
877211f5 | 397 | struct snd_pcm *pcm; |
1da177e4 LT |
398 | /* -- substreams -- */ |
399 | unsigned int substream_count; | |
400 | unsigned int substream_opened; | |
877211f5 | 401 | struct snd_pcm_substream *substream; |
1da177e4 LT |
402 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
403 | /* -- OSS things -- */ | |
877211f5 | 404 | struct snd_pcm_oss_stream oss; |
1da177e4 | 405 | #endif |
b7d90a35 | 406 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
407 | struct snd_info_entry *proc_root; |
408 | struct snd_info_entry *proc_info_entry; | |
b7d90a35 | 409 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
1da177e4 | 410 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ |
877211f5 | 411 | struct snd_info_entry *proc_xrun_debug_entry; |
1da177e4 | 412 | #endif |
b7d90a35 | 413 | #endif |
1da177e4 LT |
414 | }; |
415 | ||
877211f5 TI |
416 | struct snd_pcm { |
417 | struct snd_card *card; | |
f87135f5 | 418 | struct list_head list; |
1da177e4 LT |
419 | unsigned int device; /* device number */ |
420 | unsigned int info_flags; | |
421 | unsigned short dev_class; | |
422 | unsigned short dev_subclass; | |
423 | char id[64]; | |
424 | char name[80]; | |
877211f5 | 425 | struct snd_pcm_str streams[2]; |
1a60d4c5 | 426 | struct mutex open_mutex; |
1da177e4 LT |
427 | wait_queue_head_t open_wait; |
428 | void *private_data; | |
877211f5 | 429 | void (*private_free) (struct snd_pcm *pcm); |
c78085fc | 430 | struct device *dev; /* actual hw device this belongs to */ |
1da177e4 | 431 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 432 | struct snd_pcm_oss oss; |
1da177e4 LT |
433 | #endif |
434 | }; | |
435 | ||
877211f5 TI |
436 | struct snd_pcm_notify { |
437 | int (*n_register) (struct snd_pcm * pcm); | |
438 | int (*n_disconnect) (struct snd_pcm * pcm); | |
439 | int (*n_unregister) (struct snd_pcm * pcm); | |
1da177e4 | 440 | struct list_head list; |
877211f5 | 441 | }; |
1da177e4 LT |
442 | |
443 | /* | |
444 | * Registering | |
445 | */ | |
446 | ||
54047320 | 447 | extern const struct file_operations snd_pcm_f_ops[2]; |
1da177e4 | 448 | |
877211f5 | 449 | int snd_pcm_new(struct snd_card *card, char *id, int device, |
1da177e4 | 450 | int playback_count, int capture_count, |
877211f5 TI |
451 | struct snd_pcm **rpcm); |
452 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); | |
1da177e4 | 453 | |
877211f5 | 454 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
1da177e4 LT |
455 | |
456 | /* | |
457 | * Native I/O | |
458 | */ | |
459 | ||
460 | extern rwlock_t snd_pcm_link_rwlock; | |
461 | ||
877211f5 TI |
462 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
463 | int snd_pcm_info_user(struct snd_pcm_substream *substream, | |
464 | struct snd_pcm_info __user *info); | |
465 | int snd_pcm_status(struct snd_pcm_substream *substream, | |
466 | struct snd_pcm_status *status); | |
877211f5 TI |
467 | int snd_pcm_start(struct snd_pcm_substream *substream); |
468 | int snd_pcm_stop(struct snd_pcm_substream *substream, int status); | |
469 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); | |
1da177e4 | 470 | #ifdef CONFIG_PM |
877211f5 TI |
471 | int snd_pcm_suspend(struct snd_pcm_substream *substream); |
472 | int snd_pcm_suspend_all(struct snd_pcm *pcm); | |
1da177e4 | 473 | #endif |
877211f5 | 474 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); |
3bf75f9b TI |
475 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, |
476 | struct snd_pcm_substream **rsubstream); | |
877211f5 | 477 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); |
3bf75f9b TI |
478 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, |
479 | struct snd_pcm_substream **rsubstream); | |
480 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); | |
1da177e4 | 481 | void snd_pcm_vma_notify_data(void *client, void *data); |
877211f5 | 482 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); |
1da177e4 LT |
483 | |
484 | #if BITS_PER_LONG >= 64 | |
485 | ||
486 | static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) | |
487 | { | |
488 | *rem = *n % div; | |
489 | *n /= div; | |
490 | } | |
491 | ||
492 | #elif defined(i386) | |
493 | ||
494 | static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) | |
495 | { | |
496 | u_int32_t low, high; | |
497 | low = *n & 0xffffffff; | |
498 | high = *n >> 32; | |
499 | if (high) { | |
500 | u_int32_t high1 = high % div; | |
501 | high /= div; | |
502 | asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1)); | |
503 | *n = (u_int64_t)high << 32 | low; | |
504 | } else { | |
505 | *n = low / div; | |
506 | *rem = low % div; | |
507 | } | |
508 | } | |
509 | #else | |
510 | ||
511 | static inline void divl(u_int32_t high, u_int32_t low, | |
512 | u_int32_t div, | |
513 | u_int32_t *q, u_int32_t *r) | |
514 | { | |
515 | u_int64_t n = (u_int64_t)high << 32 | low; | |
516 | u_int64_t d = (u_int64_t)div << 31; | |
517 | u_int32_t q1 = 0; | |
518 | int c = 32; | |
519 | while (n > 0xffffffffU) { | |
520 | q1 <<= 1; | |
521 | if (n >= d) { | |
522 | n -= d; | |
523 | q1 |= 1; | |
524 | } | |
525 | d >>= 1; | |
526 | c--; | |
527 | } | |
528 | q1 <<= c; | |
529 | if (n) { | |
530 | low = n; | |
531 | *q = q1 | (low / div); | |
532 | *r = low % div; | |
533 | } else { | |
534 | *r = 0; | |
535 | *q = q1; | |
536 | } | |
537 | return; | |
538 | } | |
539 | ||
540 | static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) | |
541 | { | |
542 | u_int32_t low, high; | |
543 | low = *n & 0xffffffff; | |
544 | high = *n >> 32; | |
545 | if (high) { | |
546 | u_int32_t high1 = high % div; | |
547 | u_int32_t low1 = low; | |
548 | high /= div; | |
549 | divl(high1, low1, div, &low, rem); | |
550 | *n = (u_int64_t)high << 32 | low; | |
551 | } else { | |
552 | *n = low / div; | |
553 | *rem = low % div; | |
554 | } | |
555 | } | |
556 | #endif | |
557 | ||
558 | /* | |
559 | * PCM library | |
560 | */ | |
561 | ||
877211f5 | 562 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) |
1da177e4 LT |
563 | { |
564 | return substream->group != &substream->self_group; | |
565 | } | |
566 | ||
877211f5 | 567 | static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
1da177e4 LT |
568 | { |
569 | read_lock(&snd_pcm_link_rwlock); | |
570 | spin_lock(&substream->self_group.lock); | |
571 | } | |
572 | ||
877211f5 | 573 | static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
1da177e4 LT |
574 | { |
575 | spin_unlock(&substream->self_group.lock); | |
576 | read_unlock(&snd_pcm_link_rwlock); | |
577 | } | |
578 | ||
877211f5 | 579 | static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
1da177e4 LT |
580 | { |
581 | read_lock_irq(&snd_pcm_link_rwlock); | |
582 | spin_lock(&substream->self_group.lock); | |
583 | } | |
584 | ||
877211f5 | 585 | static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
1da177e4 LT |
586 | { |
587 | spin_unlock(&substream->self_group.lock); | |
588 | read_unlock_irq(&snd_pcm_link_rwlock); | |
589 | } | |
590 | ||
591 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ | |
592 | do { \ | |
593 | read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ | |
594 | spin_lock(&substream->self_group.lock); \ | |
595 | } while (0) | |
596 | ||
597 | #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ | |
598 | do { \ | |
599 | spin_unlock(&substream->self_group.lock); \ | |
600 | read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ | |
601 | } while (0) | |
602 | ||
ef991b95 TI |
603 | #define snd_pcm_group_for_each_entry(s, substream) \ |
604 | list_for_each_entry(s, &substream->group->substreams, link_list) | |
1da177e4 | 605 | |
877211f5 | 606 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
1da177e4 LT |
607 | { |
608 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
609 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
610 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); | |
611 | } | |
612 | ||
877211f5 | 613 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
614 | { |
615 | return size * 8 / runtime->sample_bits; | |
616 | } | |
617 | ||
877211f5 | 618 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
619 | { |
620 | return size * 8 / runtime->frame_bits; | |
621 | } | |
622 | ||
877211f5 | 623 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
624 | { |
625 | return size * runtime->sample_bits / 8; | |
626 | } | |
627 | ||
877211f5 | 628 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
1da177e4 LT |
629 | { |
630 | return size * runtime->frame_bits / 8; | |
631 | } | |
632 | ||
877211f5 | 633 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
1da177e4 LT |
634 | { |
635 | return bytes % runtime->byte_align == 0; | |
636 | } | |
637 | ||
877211f5 | 638 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 639 | { |
877211f5 | 640 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
641 | return frames_to_bytes(runtime, runtime->buffer_size); |
642 | } | |
643 | ||
877211f5 | 644 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 645 | { |
877211f5 | 646 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
647 | return frames_to_bytes(runtime, runtime->period_size); |
648 | } | |
649 | ||
650 | /* | |
651 | * result is: 0 ... (boundary - 1) | |
652 | */ | |
877211f5 | 653 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
654 | { |
655 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; | |
656 | if (avail < 0) | |
657 | avail += runtime->boundary; | |
658 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) | |
659 | avail -= runtime->boundary; | |
660 | return avail; | |
661 | } | |
662 | ||
663 | /* | |
664 | * result is: 0 ... (boundary - 1) | |
665 | */ | |
877211f5 | 666 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
667 | { |
668 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; | |
669 | if (avail < 0) | |
670 | avail += runtime->boundary; | |
671 | return avail; | |
672 | } | |
673 | ||
877211f5 | 674 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
675 | { |
676 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); | |
677 | } | |
678 | ||
877211f5 | 679 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
680 | { |
681 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); | |
682 | } | |
683 | ||
684 | /** | |
685 | * snd_pcm_playback_ready - check whether the playback buffer is available | |
686 | * @substream: the pcm substream instance | |
687 | * | |
688 | * Checks whether enough free space is available on the playback buffer. | |
689 | * | |
690 | * Returns non-zero if available, or zero if not. | |
691 | */ | |
877211f5 | 692 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
1da177e4 | 693 | { |
877211f5 | 694 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
695 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
696 | } | |
697 | ||
698 | /** | |
699 | * snd_pcm_capture_ready - check whether the capture buffer is available | |
700 | * @substream: the pcm substream instance | |
701 | * | |
702 | * Checks whether enough capture data is available on the capture buffer. | |
703 | * | |
704 | * Returns non-zero if available, or zero if not. | |
705 | */ | |
877211f5 | 706 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
1da177e4 | 707 | { |
877211f5 | 708 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
709 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
710 | } | |
711 | ||
712 | /** | |
713 | * snd_pcm_playback_data - check whether any data exists on the playback buffer | |
714 | * @substream: the pcm substream instance | |
715 | * | |
716 | * Checks whether any data exists on the playback buffer. If stop_threshold | |
717 | * is bigger or equal to boundary, then this function returns always non-zero. | |
718 | * | |
719 | * Returns non-zero if exists, or zero if not. | |
720 | */ | |
877211f5 | 721 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
1da177e4 | 722 | { |
877211f5 | 723 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
724 | |
725 | if (runtime->stop_threshold >= runtime->boundary) | |
726 | return 1; | |
727 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; | |
728 | } | |
729 | ||
730 | /** | |
731 | * snd_pcm_playback_empty - check whether the playback buffer is empty | |
732 | * @substream: the pcm substream instance | |
733 | * | |
734 | * Checks whether the playback buffer is empty. | |
735 | * | |
736 | * Returns non-zero if empty, or zero if not. | |
737 | */ | |
877211f5 | 738 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
1da177e4 | 739 | { |
877211f5 | 740 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
741 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
742 | } | |
743 | ||
744 | /** | |
745 | * snd_pcm_capture_empty - check whether the capture buffer is empty | |
746 | * @substream: the pcm substream instance | |
747 | * | |
748 | * Checks whether the capture buffer is empty. | |
749 | * | |
750 | * Returns non-zero if empty, or zero if not. | |
751 | */ | |
877211f5 | 752 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
1da177e4 | 753 | { |
877211f5 | 754 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
755 | return snd_pcm_capture_avail(runtime) == 0; |
756 | } | |
757 | ||
877211f5 TI |
758 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
759 | struct snd_pcm_substream *master) | |
1da177e4 LT |
760 | { |
761 | substream->runtime->trigger_master = master; | |
762 | } | |
763 | ||
764 | static inline int hw_is_mask(int var) | |
765 | { | |
766 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && | |
767 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; | |
768 | } | |
769 | ||
770 | static inline int hw_is_interval(int var) | |
771 | { | |
772 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && | |
773 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; | |
774 | } | |
775 | ||
877211f5 | 776 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
1da177e4 LT |
777 | snd_pcm_hw_param_t var) |
778 | { | |
779 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
780 | } | |
781 | ||
877211f5 | 782 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
1da177e4 LT |
783 | snd_pcm_hw_param_t var) |
784 | { | |
785 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
786 | } | |
787 | ||
877211f5 | 788 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
789 | snd_pcm_hw_param_t var) |
790 | { | |
b9f09a48 | 791 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
1da177e4 LT |
792 | } |
793 | ||
877211f5 | 794 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
795 | snd_pcm_hw_param_t var) |
796 | { | |
b9f09a48 | 797 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
1da177e4 LT |
798 | } |
799 | ||
800 | #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) | |
801 | #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) | |
802 | #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) | |
803 | #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min | |
804 | #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min | |
805 | #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min | |
806 | #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) | |
807 | #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min | |
808 | #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min | |
809 | #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min | |
1da177e4 LT |
810 | |
811 | ||
877211f5 TI |
812 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
813 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
814 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
815 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, | |
816 | unsigned int k, struct snd_interval *c); | |
817 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, | |
818 | const struct snd_interval *b, struct snd_interval *c); | |
819 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); | |
820 | int snd_interval_ratnum(struct snd_interval *i, | |
821 | unsigned int rats_count, struct snd_ratnum *rats, | |
1da177e4 LT |
822 | unsigned int *nump, unsigned int *denp); |
823 | ||
877211f5 TI |
824 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
825 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); | |
877211f5 | 826 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 827 | |
877211f5 | 828 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 829 | |
877211f5 TI |
830 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
831 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); | |
1da177e4 | 832 | |
877211f5 | 833 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 834 | u_int32_t mask); |
877211f5 | 835 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 836 | u_int64_t mask); |
877211f5 | 837 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 838 | unsigned int min, unsigned int max); |
877211f5 TI |
839 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
840 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
841 | unsigned int cond, |
842 | snd_pcm_hw_param_t var, | |
877211f5 TI |
843 | struct snd_pcm_hw_constraint_list *l); |
844 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
845 | unsigned int cond, |
846 | snd_pcm_hw_param_t var, | |
877211f5 TI |
847 | struct snd_pcm_hw_constraint_ratnums *r); |
848 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
849 | unsigned int cond, |
850 | snd_pcm_hw_param_t var, | |
877211f5 TI |
851 | struct snd_pcm_hw_constraint_ratdens *r); |
852 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
853 | unsigned int cond, |
854 | unsigned int width, | |
855 | unsigned int msbits); | |
877211f5 | 856 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
857 | unsigned int cond, |
858 | snd_pcm_hw_param_t var, | |
859 | unsigned long step); | |
877211f5 | 860 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
861 | unsigned int cond, |
862 | snd_pcm_hw_param_t var); | |
877211f5 | 863 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
864 | unsigned int cond, |
865 | int var, | |
866 | snd_pcm_hw_rule_func_t func, void *private, | |
867 | int dep, ...); | |
868 | ||
869 | int snd_pcm_format_signed(snd_pcm_format_t format); | |
870 | int snd_pcm_format_unsigned(snd_pcm_format_t format); | |
871 | int snd_pcm_format_linear(snd_pcm_format_t format); | |
872 | int snd_pcm_format_little_endian(snd_pcm_format_t format); | |
873 | int snd_pcm_format_big_endian(snd_pcm_format_t format); | |
1b44c28d TI |
874 | #if 0 /* just for DocBook */ |
875 | /** | |
9502dcad TI |
876 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
877 | * @format: the format to check | |
878 | * | |
879 | * Returns 1 if the given PCM format is CPU-endian, 0 if | |
880 | * opposite, or a negative error code if endian not specified. | |
881 | */ | |
8cdfd251 | 882 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
1b44c28d | 883 | #endif /* DocBook */ |
9502dcad | 884 | #ifdef SNDRV_LITTLE_ENDIAN |
9d01a82e | 885 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
9502dcad | 886 | #else |
9d01a82e | 887 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
9502dcad | 888 | #endif |
1da177e4 LT |
889 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
890 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ | |
9502dcad | 891 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
1da177e4 LT |
892 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
893 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); | |
894 | snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); | |
1da177e4 | 895 | |
877211f5 TI |
896 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); |
897 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); | |
898 | int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); | |
899 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, | |
1da177e4 | 900 | unsigned int cmd, void *arg); |
877211f5 TI |
901 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
902 | int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); | |
903 | int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); | |
904 | int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); | |
905 | int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); | |
906 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); | |
877211f5 TI |
907 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); |
908 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, | |
1da177e4 LT |
909 | const void __user *buf, |
910 | snd_pcm_uframes_t frames); | |
877211f5 | 911 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
1da177e4 | 912 | void __user *buf, snd_pcm_uframes_t frames); |
877211f5 | 913 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 | 914 | void __user **bufs, snd_pcm_uframes_t frames); |
877211f5 | 915 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
916 | void __user **bufs, snd_pcm_uframes_t frames); |
917 | ||
7653d557 CL |
918 | extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; |
919 | ||
877211f5 | 920 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
918f3a0e | 921 | unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); |
1da177e4 | 922 | |
877211f5 | 923 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
1da177e4 LT |
924 | struct snd_dma_buffer *bufp) |
925 | { | |
877211f5 | 926 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
927 | if (bufp) { |
928 | runtime->dma_buffer_p = bufp; | |
929 | runtime->dma_area = bufp->area; | |
930 | runtime->dma_addr = bufp->addr; | |
931 | runtime->dma_bytes = bufp->bytes; | |
932 | } else { | |
933 | runtime->dma_buffer_p = NULL; | |
934 | runtime->dma_area = NULL; | |
935 | runtime->dma_addr = 0; | |
936 | runtime->dma_bytes = 0; | |
937 | } | |
938 | } | |
939 | ||
940 | /* | |
941 | * Timer interface | |
942 | */ | |
943 | ||
877211f5 TI |
944 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
945 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); | |
946 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); | |
1da177e4 | 947 | |
b751eef1 JK |
948 | static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, |
949 | struct timespec *tv) | |
950 | { | |
951 | if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) | |
952 | do_posix_clock_monotonic_gettime(tv); | |
953 | else | |
954 | getnstimeofday(tv); | |
955 | } | |
956 | ||
1da177e4 LT |
957 | /* |
958 | * Memory | |
959 | */ | |
960 | ||
877211f5 TI |
961 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
962 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); | |
963 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, | |
1da177e4 LT |
964 | int type, struct device *data, |
965 | size_t size, size_t max); | |
877211f5 | 966 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
1da177e4 LT |
967 | int type, void *data, |
968 | size_t size, size_t max); | |
877211f5 TI |
969 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
970 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); | |
1da177e4 LT |
971 | |
972 | #define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data) | |
973 | #define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size) | |
974 | #define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs) | |
877211f5 | 975 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset); |
1da177e4 LT |
976 | |
977 | /* handle mmap counter - PCM mmap callback should handle this counter properly */ | |
978 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) | |
979 | { | |
877211f5 | 980 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 981 | atomic_inc(&substream->mmap_count); |
1da177e4 LT |
982 | } |
983 | ||
984 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) | |
985 | { | |
877211f5 | 986 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 987 | atomic_dec(&substream->mmap_count); |
1da177e4 LT |
988 | } |
989 | ||
990 | /* mmap for io-memory area */ | |
991 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
992 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP | |
877211f5 | 993 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
1da177e4 LT |
994 | #else |
995 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 | |
996 | #define snd_pcm_lib_mmap_iomem NULL | |
997 | #endif | |
998 | ||
999 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) | |
1000 | { | |
1001 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * Misc | |
1006 | */ | |
1007 | ||
1008 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ | |
1009 | (IEC958_AES1_CON_ORIGINAL<<8)|\ | |
1010 | (IEC958_AES1_CON_PCM_CODER<<8)|\ | |
1011 | (IEC958_AES3_CON_FS_48000<<24)) | |
1012 | ||
1013 | #endif /* __SOUND_PCM_H */ |