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1da177e4 LT |
1 | #ifndef __SOUND_PCM_H |
2 | #define __SOUND_PCM_H | |
3 | ||
4 | /* | |
5 | * Digital Audio (PCM) abstract layer | |
6 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
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> | |
29 | #include <linux/bitops.h> | |
30 | ||
1da177e4 LT |
31 | #define snd_pcm_substream_chip(substream) ((substream)->private_data) |
32 | #define snd_pcm_chip(pcm) ((pcm)->private_data) | |
33 | ||
1da177e4 LT |
34 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
35 | #include "pcm_oss.h" | |
36 | #endif | |
37 | ||
38 | /* | |
39 | * Hardware (lowlevel) section | |
40 | */ | |
41 | ||
877211f5 | 42 | struct snd_pcm_hardware { |
1da177e4 LT |
43 | unsigned int info; /* SNDRV_PCM_INFO_* */ |
44 | u64 formats; /* SNDRV_PCM_FMTBIT_* */ | |
45 | unsigned int rates; /* SNDRV_PCM_RATE_* */ | |
46 | unsigned int rate_min; /* min rate */ | |
47 | unsigned int rate_max; /* max rate */ | |
48 | unsigned int channels_min; /* min channels */ | |
49 | unsigned int channels_max; /* max channels */ | |
50 | size_t buffer_bytes_max; /* max buffer size */ | |
51 | size_t period_bytes_min; /* min period size */ | |
52 | size_t period_bytes_max; /* max period size */ | |
53 | unsigned int periods_min; /* min # of periods */ | |
54 | unsigned int periods_max; /* max # of periods */ | |
55 | size_t fifo_size; /* fifo size in bytes */ | |
877211f5 | 56 | }; |
1da177e4 | 57 | |
877211f5 TI |
58 | struct snd_pcm_ops { |
59 | int (*open)(struct snd_pcm_substream *substream); | |
60 | int (*close)(struct snd_pcm_substream *substream); | |
61 | int (*ioctl)(struct snd_pcm_substream * substream, | |
1da177e4 | 62 | unsigned int cmd, void *arg); |
877211f5 TI |
63 | int (*hw_params)(struct snd_pcm_substream *substream, |
64 | struct snd_pcm_hw_params *params); | |
65 | int (*hw_free)(struct snd_pcm_substream *substream); | |
66 | int (*prepare)(struct snd_pcm_substream *substream); | |
67 | int (*trigger)(struct snd_pcm_substream *substream, int cmd); | |
68 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); | |
69 | int (*copy)(struct snd_pcm_substream *substream, int channel, | |
70 | snd_pcm_uframes_t pos, | |
1da177e4 | 71 | void __user *buf, snd_pcm_uframes_t count); |
877211f5 | 72 | int (*silence)(struct snd_pcm_substream *substream, int channel, |
1da177e4 | 73 | snd_pcm_uframes_t pos, snd_pcm_uframes_t count); |
877211f5 TI |
74 | struct page *(*page)(struct snd_pcm_substream *substream, |
75 | unsigned long offset); | |
76 | int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); | |
77 | int (*ack)(struct snd_pcm_substream *substream); | |
78 | }; | |
1da177e4 LT |
79 | |
80 | /* | |
81 | * | |
82 | */ | |
83 | ||
84 | #define SNDRV_PCM_DEVICES 8 | |
85 | ||
86 | #define SNDRV_PCM_IOCTL1_FALSE ((void *)0) | |
87 | #define SNDRV_PCM_IOCTL1_TRUE ((void *)1) | |
88 | ||
89 | #define SNDRV_PCM_IOCTL1_RESET 0 | |
90 | #define SNDRV_PCM_IOCTL1_INFO 1 | |
91 | #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 | |
92 | #define SNDRV_PCM_IOCTL1_GSTATE 3 | |
93 | ||
94 | #define SNDRV_PCM_TRIGGER_STOP 0 | |
95 | #define SNDRV_PCM_TRIGGER_START 1 | |
96 | #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 | |
97 | #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 | |
98 | #define SNDRV_PCM_TRIGGER_SUSPEND 5 | |
99 | #define SNDRV_PCM_TRIGGER_RESUME 6 | |
100 | ||
101 | #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) | |
102 | ||
103 | /* If you change this don't forget to change rates[] table in pcm_native.c */ | |
104 | #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ | |
105 | #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ | |
106 | #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ | |
107 | #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ | |
108 | #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ | |
109 | #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ | |
110 | #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ | |
111 | #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ | |
112 | #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ | |
113 | #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ | |
114 | #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ | |
115 | #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ | |
116 | #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ | |
117 | ||
118 | #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ | |
119 | #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ | |
120 | ||
121 | #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ | |
122 | SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ | |
123 | SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) | |
124 | #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) | |
125 | #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ | |
126 | SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) | |
127 | #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ | |
128 | SNDRV_PCM_RATE_192000) | |
129 | #define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8) | |
130 | #define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8) | |
131 | #define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE) | |
132 | #define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE) | |
133 | #define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE) | |
134 | #define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE) | |
135 | #define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE) | |
136 | #define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE) | |
137 | #define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE) | |
138 | #define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE) | |
139 | #define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE) | |
140 | #define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE) | |
141 | #define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE) | |
142 | #define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE) | |
143 | #define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE) | |
144 | #define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE) | |
145 | #define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE) | |
146 | #define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE) | |
147 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE) | |
148 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE) | |
149 | #define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW) | |
150 | #define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW) | |
151 | #define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM) | |
152 | #define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG) | |
153 | #define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM) | |
154 | #define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL) | |
155 | #define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE) | |
156 | #define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE) | |
157 | #define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE) | |
158 | #define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE) | |
159 | #define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE) | |
160 | #define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE) | |
161 | #define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE) | |
162 | #define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE) | |
163 | #define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE) | |
164 | #define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE) | |
165 | #define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE) | |
166 | #define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE) | |
167 | ||
168 | #ifdef SNDRV_LITTLE_ENDIAN | |
169 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE | |
170 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE | |
171 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE | |
172 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE | |
173 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE | |
174 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE | |
175 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE | |
176 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE | |
177 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | |
178 | #endif | |
179 | #ifdef SNDRV_BIG_ENDIAN | |
180 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE | |
181 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE | |
182 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE | |
183 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE | |
184 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE | |
185 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE | |
186 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE | |
187 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE | |
188 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE | |
189 | #endif | |
190 | ||
877211f5 TI |
191 | struct snd_pcm_file { |
192 | struct snd_pcm_substream *substream; | |
193 | struct snd_pcm_file *next; | |
1da177e4 LT |
194 | }; |
195 | ||
877211f5 TI |
196 | struct snd_pcm_hw_rule; |
197 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, | |
198 | struct snd_pcm_hw_rule *rule); | |
1da177e4 | 199 | |
877211f5 | 200 | struct snd_pcm_hw_rule { |
1da177e4 LT |
201 | unsigned int cond; |
202 | snd_pcm_hw_rule_func_t func; | |
203 | int var; | |
204 | int deps[4]; | |
205 | void *private; | |
206 | }; | |
207 | ||
877211f5 TI |
208 | struct snd_pcm_hw_constraints { |
209 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - | |
1da177e4 | 210 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
877211f5 | 211 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
1da177e4 LT |
212 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
213 | unsigned int rules_num; | |
214 | unsigned int rules_all; | |
877211f5 TI |
215 | struct snd_pcm_hw_rule *rules; |
216 | }; | |
1da177e4 | 217 | |
877211f5 TI |
218 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
219 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
220 | { |
221 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
222 | } | |
223 | ||
877211f5 TI |
224 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
225 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
226 | { |
227 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
228 | } | |
229 | ||
877211f5 | 230 | struct snd_ratnum { |
1da177e4 LT |
231 | unsigned int num; |
232 | unsigned int den_min, den_max, den_step; | |
877211f5 | 233 | }; |
1da177e4 | 234 | |
877211f5 | 235 | struct snd_ratden { |
1da177e4 LT |
236 | unsigned int num_min, num_max, num_step; |
237 | unsigned int den; | |
877211f5 | 238 | }; |
1da177e4 | 239 | |
877211f5 | 240 | struct snd_pcm_hw_constraint_ratnums { |
1da177e4 | 241 | int nrats; |
877211f5 TI |
242 | struct snd_ratnum *rats; |
243 | }; | |
1da177e4 | 244 | |
877211f5 | 245 | struct snd_pcm_hw_constraint_ratdens { |
1da177e4 | 246 | int nrats; |
877211f5 TI |
247 | struct snd_ratden *rats; |
248 | }; | |
1da177e4 | 249 | |
877211f5 | 250 | struct snd_pcm_hw_constraint_list { |
1da177e4 LT |
251 | unsigned int count; |
252 | unsigned int *list; | |
253 | unsigned int mask; | |
877211f5 | 254 | }; |
1da177e4 | 255 | |
877211f5 | 256 | struct snd_pcm_runtime { |
1da177e4 | 257 | /* -- Status -- */ |
877211f5 | 258 | struct snd_pcm_substream *trigger_master; |
07799e75 | 259 | struct timespec trigger_tstamp; /* trigger timestamp */ |
1da177e4 LT |
260 | int overrange; |
261 | snd_pcm_uframes_t avail_max; | |
262 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ | |
263 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/ | |
264 | ||
265 | /* -- HW params -- */ | |
266 | snd_pcm_access_t access; /* access mode */ | |
267 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ | |
268 | snd_pcm_subformat_t subformat; /* subformat */ | |
269 | unsigned int rate; /* rate in Hz */ | |
270 | unsigned int channels; /* channels */ | |
271 | snd_pcm_uframes_t period_size; /* period size */ | |
272 | unsigned int periods; /* periods */ | |
273 | snd_pcm_uframes_t buffer_size; /* buffer size */ | |
274 | unsigned int tick_time; /* tick time */ | |
275 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ | |
276 | size_t byte_align; | |
277 | unsigned int frame_bits; | |
278 | unsigned int sample_bits; | |
279 | unsigned int info; | |
280 | unsigned int rate_num; | |
281 | unsigned int rate_den; | |
282 | ||
283 | /* -- SW params -- */ | |
877211f5 | 284 | int tstamp_mode; /* mmap timestamp is updated */ |
1da177e4 LT |
285 | unsigned int period_step; |
286 | unsigned int sleep_min; /* min ticks to sleep */ | |
287 | snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */ | |
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 -- */ | |
877211f5 TI |
301 | volatile struct snd_pcm_mmap_status *status; |
302 | volatile struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
303 | atomic_t mmap_count; |
304 | ||
305 | /* -- locking / scheduling -- */ | |
306 | wait_queue_head_t sleep; | |
307 | struct timer_list tick_timer; | |
308 | struct fasync_struct *fasync; | |
309 | ||
310 | /* -- private section -- */ | |
311 | void *private_data; | |
877211f5 | 312 | void (*private_free)(struct snd_pcm_runtime *runtime); |
1da177e4 LT |
313 | |
314 | /* -- hardware description -- */ | |
877211f5 TI |
315 | struct snd_pcm_hardware hw; |
316 | struct snd_pcm_hw_constraints hw_constraints; | |
1da177e4 LT |
317 | |
318 | /* -- interrupt callbacks -- */ | |
877211f5 TI |
319 | void (*transfer_ack_begin)(struct snd_pcm_substream *substream); |
320 | void (*transfer_ack_end)(struct snd_pcm_substream *substream); | |
1da177e4 LT |
321 | |
322 | /* -- timer -- */ | |
323 | unsigned int timer_resolution; /* timer resolution */ | |
324 | ||
325 | /* -- DMA -- */ | |
326 | unsigned char *dma_area; /* DMA area */ | |
327 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ | |
328 | size_t dma_bytes; /* size of DMA area */ | |
329 | ||
330 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ | |
331 | ||
332 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
333 | /* -- OSS things -- */ | |
877211f5 | 334 | struct snd_pcm_oss_runtime oss; |
1da177e4 LT |
335 | #endif |
336 | }; | |
337 | ||
877211f5 | 338 | struct snd_pcm_group { /* keep linked substreams */ |
1da177e4 LT |
339 | spinlock_t lock; |
340 | struct list_head substreams; | |
341 | int count; | |
877211f5 | 342 | }; |
1da177e4 | 343 | |
877211f5 TI |
344 | struct snd_pcm_substream { |
345 | struct snd_pcm *pcm; | |
346 | struct snd_pcm_str *pstr; | |
1da177e4 LT |
347 | void *private_data; /* copied from pcm->private_data */ |
348 | int number; | |
349 | char name[32]; /* substream name */ | |
350 | int stream; /* stream (direction) */ | |
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 TI |
371 | int ref_count; |
372 | unsigned int f_flags; | |
3bf75f9b | 373 | void (*pcm_release)(struct snd_pcm_substream *); |
1da177e4 LT |
374 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
375 | /* -- OSS things -- */ | |
877211f5 | 376 | struct snd_pcm_oss_substream oss; |
1da177e4 | 377 | #endif |
b7d90a35 | 378 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
379 | struct snd_info_entry *proc_root; |
380 | struct snd_info_entry *proc_info_entry; | |
381 | struct snd_info_entry *proc_hw_params_entry; | |
382 | struct snd_info_entry *proc_sw_params_entry; | |
383 | struct snd_info_entry *proc_status_entry; | |
384 | struct snd_info_entry *proc_prealloc_entry; | |
b7d90a35 | 385 | #endif |
1da177e4 LT |
386 | /* misc flags */ |
387 | unsigned int no_mmap_ctrl: 1; | |
3bf75f9b | 388 | unsigned int hw_opened: 1; |
1da177e4 LT |
389 | }; |
390 | ||
0df63e44 | 391 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
1da177e4 LT |
392 | |
393 | ||
877211f5 | 394 | struct snd_pcm_str { |
1da177e4 | 395 | int stream; /* stream (direction) */ |
877211f5 | 396 | struct snd_pcm *pcm; |
1da177e4 LT |
397 | /* -- substreams -- */ |
398 | unsigned int substream_count; | |
399 | unsigned int substream_opened; | |
877211f5 | 400 | struct snd_pcm_substream *substream; |
1da177e4 LT |
401 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
402 | /* -- OSS things -- */ | |
877211f5 | 403 | struct snd_pcm_oss_stream oss; |
1da177e4 | 404 | #endif |
877211f5 | 405 | struct snd_pcm_file *files; |
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); |
1da177e4 | 430 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 431 | struct snd_pcm_oss oss; |
1da177e4 LT |
432 | #endif |
433 | }; | |
434 | ||
877211f5 TI |
435 | struct snd_pcm_notify { |
436 | int (*n_register) (struct snd_pcm * pcm); | |
437 | int (*n_disconnect) (struct snd_pcm * pcm); | |
438 | int (*n_unregister) (struct snd_pcm * pcm); | |
1da177e4 | 439 | struct list_head list; |
877211f5 | 440 | }; |
1da177e4 LT |
441 | |
442 | /* | |
443 | * Registering | |
444 | */ | |
445 | ||
2af677fc | 446 | extern struct file_operations snd_pcm_f_ops[2]; |
1da177e4 | 447 | |
877211f5 | 448 | int snd_pcm_new(struct snd_card *card, char *id, int device, |
1da177e4 | 449 | int playback_count, int capture_count, |
877211f5 TI |
450 | struct snd_pcm **rpcm); |
451 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); | |
1da177e4 | 452 | |
877211f5 | 453 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
1da177e4 LT |
454 | |
455 | /* | |
456 | * Native I/O | |
457 | */ | |
458 | ||
459 | extern rwlock_t snd_pcm_link_rwlock; | |
460 | ||
877211f5 TI |
461 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
462 | int snd_pcm_info_user(struct snd_pcm_substream *substream, | |
463 | struct snd_pcm_info __user *info); | |
464 | int snd_pcm_status(struct snd_pcm_substream *substream, | |
465 | struct snd_pcm_status *status); | |
877211f5 TI |
466 | int snd_pcm_start(struct snd_pcm_substream *substream); |
467 | int snd_pcm_stop(struct snd_pcm_substream *substream, int status); | |
468 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); | |
1da177e4 | 469 | #ifdef CONFIG_PM |
877211f5 TI |
470 | int snd_pcm_suspend(struct snd_pcm_substream *substream); |
471 | int snd_pcm_suspend_all(struct snd_pcm *pcm); | |
1da177e4 | 472 | #endif |
877211f5 | 473 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); |
3bf75f9b TI |
474 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, |
475 | struct snd_pcm_substream **rsubstream); | |
877211f5 | 476 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); |
3bf75f9b TI |
477 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, |
478 | struct snd_pcm_substream **rsubstream); | |
479 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); | |
1da177e4 | 480 | void snd_pcm_vma_notify_data(void *client, void *data); |
877211f5 | 481 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); |
1da177e4 LT |
482 | |
483 | #if BITS_PER_LONG >= 64 | |
484 | ||
485 | static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) | |
486 | { | |
487 | *rem = *n % div; | |
488 | *n /= div; | |
489 | } | |
490 | ||
491 | #elif defined(i386) | |
492 | ||
493 | static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) | |
494 | { | |
495 | u_int32_t low, high; | |
496 | low = *n & 0xffffffff; | |
497 | high = *n >> 32; | |
498 | if (high) { | |
499 | u_int32_t high1 = high % div; | |
500 | high /= div; | |
501 | asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1)); | |
502 | *n = (u_int64_t)high << 32 | low; | |
503 | } else { | |
504 | *n = low / div; | |
505 | *rem = low % div; | |
506 | } | |
507 | } | |
508 | #else | |
509 | ||
510 | static inline void divl(u_int32_t high, u_int32_t low, | |
511 | u_int32_t div, | |
512 | u_int32_t *q, u_int32_t *r) | |
513 | { | |
514 | u_int64_t n = (u_int64_t)high << 32 | low; | |
515 | u_int64_t d = (u_int64_t)div << 31; | |
516 | u_int32_t q1 = 0; | |
517 | int c = 32; | |
518 | while (n > 0xffffffffU) { | |
519 | q1 <<= 1; | |
520 | if (n >= d) { | |
521 | n -= d; | |
522 | q1 |= 1; | |
523 | } | |
524 | d >>= 1; | |
525 | c--; | |
526 | } | |
527 | q1 <<= c; | |
528 | if (n) { | |
529 | low = n; | |
530 | *q = q1 | (low / div); | |
531 | *r = low % div; | |
532 | } else { | |
533 | *r = 0; | |
534 | *q = q1; | |
535 | } | |
536 | return; | |
537 | } | |
538 | ||
539 | static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) | |
540 | { | |
541 | u_int32_t low, high; | |
542 | low = *n & 0xffffffff; | |
543 | high = *n >> 32; | |
544 | if (high) { | |
545 | u_int32_t high1 = high % div; | |
546 | u_int32_t low1 = low; | |
547 | high /= div; | |
548 | divl(high1, low1, div, &low, rem); | |
549 | *n = (u_int64_t)high << 32 | low; | |
550 | } else { | |
551 | *n = low / div; | |
552 | *rem = low % div; | |
553 | } | |
554 | } | |
555 | #endif | |
556 | ||
557 | /* | |
558 | * PCM library | |
559 | */ | |
560 | ||
877211f5 | 561 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) |
1da177e4 LT |
562 | { |
563 | return substream->group != &substream->self_group; | |
564 | } | |
565 | ||
877211f5 | 566 | static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
1da177e4 LT |
567 | { |
568 | read_lock(&snd_pcm_link_rwlock); | |
569 | spin_lock(&substream->self_group.lock); | |
570 | } | |
571 | ||
877211f5 | 572 | static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
1da177e4 LT |
573 | { |
574 | spin_unlock(&substream->self_group.lock); | |
575 | read_unlock(&snd_pcm_link_rwlock); | |
576 | } | |
577 | ||
877211f5 | 578 | static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
1da177e4 LT |
579 | { |
580 | read_lock_irq(&snd_pcm_link_rwlock); | |
581 | spin_lock(&substream->self_group.lock); | |
582 | } | |
583 | ||
877211f5 | 584 | static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
1da177e4 LT |
585 | { |
586 | spin_unlock(&substream->self_group.lock); | |
587 | read_unlock_irq(&snd_pcm_link_rwlock); | |
588 | } | |
589 | ||
590 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ | |
591 | do { \ | |
592 | read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ | |
593 | spin_lock(&substream->self_group.lock); \ | |
594 | } while (0) | |
595 | ||
596 | #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ | |
597 | do { \ | |
598 | spin_unlock(&substream->self_group.lock); \ | |
599 | read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ | |
600 | } while (0) | |
601 | ||
602 | #define snd_pcm_group_for_each(pos, substream) \ | |
603 | list_for_each(pos, &substream->group->substreams) | |
604 | ||
605 | #define snd_pcm_group_substream_entry(pos) \ | |
877211f5 | 606 | list_entry(pos, struct snd_pcm_substream, link_list) |
1da177e4 | 607 | |
877211f5 | 608 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
1da177e4 LT |
609 | { |
610 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
611 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
612 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); | |
613 | } | |
614 | ||
877211f5 | 615 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
616 | { |
617 | return size * 8 / runtime->sample_bits; | |
618 | } | |
619 | ||
877211f5 | 620 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
621 | { |
622 | return size * 8 / runtime->frame_bits; | |
623 | } | |
624 | ||
877211f5 | 625 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
626 | { |
627 | return size * runtime->sample_bits / 8; | |
628 | } | |
629 | ||
877211f5 | 630 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
1da177e4 LT |
631 | { |
632 | return size * runtime->frame_bits / 8; | |
633 | } | |
634 | ||
877211f5 | 635 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
1da177e4 LT |
636 | { |
637 | return bytes % runtime->byte_align == 0; | |
638 | } | |
639 | ||
877211f5 | 640 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 641 | { |
877211f5 | 642 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
643 | return frames_to_bytes(runtime, runtime->buffer_size); |
644 | } | |
645 | ||
877211f5 | 646 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 647 | { |
877211f5 | 648 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
649 | return frames_to_bytes(runtime, runtime->period_size); |
650 | } | |
651 | ||
652 | /* | |
653 | * result is: 0 ... (boundary - 1) | |
654 | */ | |
877211f5 | 655 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
656 | { |
657 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; | |
658 | if (avail < 0) | |
659 | avail += runtime->boundary; | |
660 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) | |
661 | avail -= runtime->boundary; | |
662 | return avail; | |
663 | } | |
664 | ||
665 | /* | |
666 | * result is: 0 ... (boundary - 1) | |
667 | */ | |
877211f5 | 668 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
669 | { |
670 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; | |
671 | if (avail < 0) | |
672 | avail += runtime->boundary; | |
673 | return avail; | |
674 | } | |
675 | ||
877211f5 | 676 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
677 | { |
678 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); | |
679 | } | |
680 | ||
877211f5 | 681 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
682 | { |
683 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); | |
684 | } | |
685 | ||
686 | /** | |
687 | * snd_pcm_playback_ready - check whether the playback buffer is available | |
688 | * @substream: the pcm substream instance | |
689 | * | |
690 | * Checks whether enough free space is available on the playback buffer. | |
691 | * | |
692 | * Returns non-zero if available, or zero if not. | |
693 | */ | |
877211f5 | 694 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
1da177e4 | 695 | { |
877211f5 | 696 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
697 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
698 | } | |
699 | ||
700 | /** | |
701 | * snd_pcm_capture_ready - check whether the capture buffer is available | |
702 | * @substream: the pcm substream instance | |
703 | * | |
704 | * Checks whether enough capture data is available on the capture buffer. | |
705 | * | |
706 | * Returns non-zero if available, or zero if not. | |
707 | */ | |
877211f5 | 708 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
1da177e4 | 709 | { |
877211f5 | 710 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
711 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
712 | } | |
713 | ||
714 | /** | |
715 | * snd_pcm_playback_data - check whether any data exists on the playback buffer | |
716 | * @substream: the pcm substream instance | |
717 | * | |
718 | * Checks whether any data exists on the playback buffer. If stop_threshold | |
719 | * is bigger or equal to boundary, then this function returns always non-zero. | |
720 | * | |
721 | * Returns non-zero if exists, or zero if not. | |
722 | */ | |
877211f5 | 723 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
1da177e4 | 724 | { |
877211f5 | 725 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
726 | |
727 | if (runtime->stop_threshold >= runtime->boundary) | |
728 | return 1; | |
729 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; | |
730 | } | |
731 | ||
732 | /** | |
733 | * snd_pcm_playback_empty - check whether the playback buffer is empty | |
734 | * @substream: the pcm substream instance | |
735 | * | |
736 | * Checks whether the playback buffer is empty. | |
737 | * | |
738 | * Returns non-zero if empty, or zero if not. | |
739 | */ | |
877211f5 | 740 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
1da177e4 | 741 | { |
877211f5 | 742 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
743 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
744 | } | |
745 | ||
746 | /** | |
747 | * snd_pcm_capture_empty - check whether the capture buffer is empty | |
748 | * @substream: the pcm substream instance | |
749 | * | |
750 | * Checks whether the capture buffer is empty. | |
751 | * | |
752 | * Returns non-zero if empty, or zero if not. | |
753 | */ | |
877211f5 | 754 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
1da177e4 | 755 | { |
877211f5 | 756 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
757 | return snd_pcm_capture_avail(runtime) == 0; |
758 | } | |
759 | ||
877211f5 TI |
760 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
761 | struct snd_pcm_substream *master) | |
1da177e4 LT |
762 | { |
763 | substream->runtime->trigger_master = master; | |
764 | } | |
765 | ||
766 | static inline int hw_is_mask(int var) | |
767 | { | |
768 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && | |
769 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; | |
770 | } | |
771 | ||
772 | static inline int hw_is_interval(int var) | |
773 | { | |
774 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && | |
775 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; | |
776 | } | |
777 | ||
877211f5 | 778 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
1da177e4 LT |
779 | snd_pcm_hw_param_t var) |
780 | { | |
781 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
782 | } | |
783 | ||
877211f5 | 784 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
1da177e4 LT |
785 | snd_pcm_hw_param_t var) |
786 | { | |
787 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
788 | } | |
789 | ||
877211f5 | 790 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
791 | snd_pcm_hw_param_t var) |
792 | { | |
877211f5 | 793 | return (const struct snd_mask *)hw_param_mask((struct snd_pcm_hw_params*) params, var); |
1da177e4 LT |
794 | } |
795 | ||
877211f5 | 796 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
797 | snd_pcm_hw_param_t var) |
798 | { | |
877211f5 | 799 | return (const struct snd_interval *)hw_param_interval((struct snd_pcm_hw_params*) params, var); |
1da177e4 LT |
800 | } |
801 | ||
802 | #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) | |
803 | #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) | |
804 | #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) | |
805 | #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min | |
806 | #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min | |
807 | #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min | |
808 | #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) | |
809 | #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min | |
810 | #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min | |
811 | #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min | |
812 | #define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min | |
813 | ||
814 | ||
877211f5 TI |
815 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
816 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
817 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
818 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, | |
819 | unsigned int k, struct snd_interval *c); | |
820 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, | |
821 | const struct snd_interval *b, struct snd_interval *c); | |
822 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); | |
823 | int snd_interval_ratnum(struct snd_interval *i, | |
824 | unsigned int rats_count, struct snd_ratnum *rats, | |
1da177e4 LT |
825 | unsigned int *nump, unsigned int *denp); |
826 | ||
877211f5 TI |
827 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
828 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); | |
877211f5 | 829 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 830 | |
877211f5 | 831 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 832 | |
877211f5 TI |
833 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
834 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); | |
1da177e4 | 835 | |
877211f5 | 836 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 837 | u_int32_t mask); |
877211f5 | 838 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 839 | u_int64_t mask); |
877211f5 | 840 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 841 | unsigned int min, unsigned int max); |
877211f5 TI |
842 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
843 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
844 | unsigned int cond, |
845 | snd_pcm_hw_param_t var, | |
877211f5 TI |
846 | struct snd_pcm_hw_constraint_list *l); |
847 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
848 | unsigned int cond, |
849 | snd_pcm_hw_param_t var, | |
877211f5 TI |
850 | struct snd_pcm_hw_constraint_ratnums *r); |
851 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
852 | unsigned int cond, |
853 | snd_pcm_hw_param_t var, | |
877211f5 TI |
854 | struct snd_pcm_hw_constraint_ratdens *r); |
855 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
856 | unsigned int cond, |
857 | unsigned int width, | |
858 | unsigned int msbits); | |
877211f5 | 859 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
860 | unsigned int cond, |
861 | snd_pcm_hw_param_t var, | |
862 | unsigned long step); | |
877211f5 | 863 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
864 | unsigned int cond, |
865 | snd_pcm_hw_param_t var); | |
877211f5 | 866 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
867 | unsigned int cond, |
868 | int var, | |
869 | snd_pcm_hw_rule_func_t func, void *private, | |
870 | int dep, ...); | |
871 | ||
872 | int snd_pcm_format_signed(snd_pcm_format_t format); | |
873 | int snd_pcm_format_unsigned(snd_pcm_format_t format); | |
874 | int snd_pcm_format_linear(snd_pcm_format_t format); | |
875 | int snd_pcm_format_little_endian(snd_pcm_format_t format); | |
876 | int snd_pcm_format_big_endian(snd_pcm_format_t format); | |
1b44c28d TI |
877 | #if 0 /* just for DocBook */ |
878 | /** | |
9502dcad TI |
879 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
880 | * @format: the format to check | |
881 | * | |
882 | * Returns 1 if the given PCM format is CPU-endian, 0 if | |
883 | * opposite, or a negative error code if endian not specified. | |
884 | */ | |
8cdfd251 | 885 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
1b44c28d | 886 | #endif /* DocBook */ |
9502dcad | 887 | #ifdef SNDRV_LITTLE_ENDIAN |
9d01a82e | 888 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
9502dcad | 889 | #else |
9d01a82e | 890 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
9502dcad | 891 | #endif |
1da177e4 LT |
892 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
893 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ | |
9502dcad | 894 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
1da177e4 LT |
895 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
896 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); | |
897 | snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); | |
1da177e4 | 898 | |
877211f5 TI |
899 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); |
900 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); | |
901 | int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); | |
902 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, | |
1da177e4 | 903 | unsigned int cmd, void *arg); |
877211f5 TI |
904 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
905 | int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); | |
906 | int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); | |
907 | int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); | |
908 | int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); | |
909 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); | |
910 | void snd_pcm_tick_prepare(struct snd_pcm_substream *substream); | |
911 | void snd_pcm_tick_set(struct snd_pcm_substream *substream, unsigned long ticks); | |
912 | void snd_pcm_tick_elapsed(struct snd_pcm_substream *substream); | |
913 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); | |
914 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, | |
1da177e4 LT |
915 | const void __user *buf, |
916 | snd_pcm_uframes_t frames); | |
877211f5 | 917 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
1da177e4 | 918 | void __user *buf, snd_pcm_uframes_t frames); |
877211f5 | 919 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 | 920 | void __user **bufs, snd_pcm_uframes_t frames); |
877211f5 | 921 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
922 | void __user **bufs, snd_pcm_uframes_t frames); |
923 | ||
877211f5 | 924 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
1da177e4 | 925 | |
877211f5 | 926 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
1da177e4 LT |
927 | struct snd_dma_buffer *bufp) |
928 | { | |
877211f5 | 929 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
930 | if (bufp) { |
931 | runtime->dma_buffer_p = bufp; | |
932 | runtime->dma_area = bufp->area; | |
933 | runtime->dma_addr = bufp->addr; | |
934 | runtime->dma_bytes = bufp->bytes; | |
935 | } else { | |
936 | runtime->dma_buffer_p = NULL; | |
937 | runtime->dma_area = NULL; | |
938 | runtime->dma_addr = 0; | |
939 | runtime->dma_bytes = 0; | |
940 | } | |
941 | } | |
942 | ||
943 | /* | |
944 | * Timer interface | |
945 | */ | |
946 | ||
877211f5 TI |
947 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
948 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); | |
949 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); | |
1da177e4 LT |
950 | |
951 | /* | |
952 | * Memory | |
953 | */ | |
954 | ||
877211f5 TI |
955 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
956 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); | |
957 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, | |
1da177e4 LT |
958 | int type, struct device *data, |
959 | size_t size, size_t max); | |
877211f5 | 960 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
1da177e4 LT |
961 | int type, void *data, |
962 | size_t size, size_t max); | |
877211f5 TI |
963 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
964 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); | |
1da177e4 LT |
965 | |
966 | #define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data) | |
967 | #define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size) | |
968 | #define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs) | |
877211f5 | 969 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset); |
1da177e4 LT |
970 | |
971 | /* handle mmap counter - PCM mmap callback should handle this counter properly */ | |
972 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) | |
973 | { | |
877211f5 | 974 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
1da177e4 LT |
975 | atomic_inc(&substream->runtime->mmap_count); |
976 | } | |
977 | ||
978 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) | |
979 | { | |
877211f5 | 980 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
1da177e4 LT |
981 | atomic_dec(&substream->runtime->mmap_count); |
982 | } | |
983 | ||
984 | /* mmap for io-memory area */ | |
985 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
986 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP | |
877211f5 | 987 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
1da177e4 LT |
988 | #else |
989 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 | |
990 | #define snd_pcm_lib_mmap_iomem NULL | |
991 | #endif | |
992 | ||
993 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) | |
994 | { | |
995 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; | |
996 | } | |
997 | ||
998 | /* | |
999 | * Misc | |
1000 | */ | |
1001 | ||
1002 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ | |
1003 | (IEC958_AES1_CON_ORIGINAL<<8)|\ | |
1004 | (IEC958_AES1_CON_PCM_CODER<<8)|\ | |
1005 | (IEC958_AES3_CON_FS_48000<<24)) | |
1006 | ||
1007 | #endif /* __SOUND_PCM_H */ |