]>
Commit | Line | Data |
---|---|---|
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> | |
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 | |
877211f5 TI |
59 | struct snd_pcm_ops { |
60 | int (*open)(struct snd_pcm_substream *substream); | |
61 | int (*close)(struct snd_pcm_substream *substream); | |
62 | int (*ioctl)(struct snd_pcm_substream * substream, | |
1da177e4 | 63 | unsigned int cmd, void *arg); |
877211f5 TI |
64 | int (*hw_params)(struct snd_pcm_substream *substream, |
65 | struct snd_pcm_hw_params *params); | |
66 | int (*hw_free)(struct snd_pcm_substream *substream); | |
67 | int (*prepare)(struct snd_pcm_substream *substream); | |
68 | int (*trigger)(struct snd_pcm_substream *substream, int cmd); | |
69 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); | |
70 | int (*copy)(struct snd_pcm_substream *substream, int channel, | |
71 | snd_pcm_uframes_t pos, | |
1da177e4 | 72 | void __user *buf, snd_pcm_uframes_t count); |
877211f5 | 73 | int (*silence)(struct snd_pcm_substream *substream, int channel, |
1da177e4 | 74 | snd_pcm_uframes_t pos, snd_pcm_uframes_t count); |
877211f5 TI |
75 | struct page *(*page)(struct snd_pcm_substream *substream, |
76 | unsigned long offset); | |
77 | int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); | |
78 | int (*ack)(struct snd_pcm_substream *substream); | |
79 | }; | |
1da177e4 LT |
80 | |
81 | /* | |
82 | * | |
83 | */ | |
84 | ||
85 | #define SNDRV_PCM_DEVICES 8 | |
86 | ||
87 | #define SNDRV_PCM_IOCTL1_FALSE ((void *)0) | |
88 | #define SNDRV_PCM_IOCTL1_TRUE ((void *)1) | |
89 | ||
90 | #define SNDRV_PCM_IOCTL1_RESET 0 | |
91 | #define SNDRV_PCM_IOCTL1_INFO 1 | |
92 | #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 | |
93 | #define SNDRV_PCM_IOCTL1_GSTATE 3 | |
94 | ||
95 | #define SNDRV_PCM_TRIGGER_STOP 0 | |
96 | #define SNDRV_PCM_TRIGGER_START 1 | |
97 | #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 | |
98 | #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 | |
99 | #define SNDRV_PCM_TRIGGER_SUSPEND 5 | |
100 | #define SNDRV_PCM_TRIGGER_RESUME 6 | |
101 | ||
102 | #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) | |
103 | ||
104 | /* If you change this don't forget to change rates[] table in pcm_native.c */ | |
105 | #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ | |
106 | #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ | |
107 | #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ | |
108 | #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ | |
109 | #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ | |
110 | #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ | |
111 | #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ | |
112 | #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ | |
113 | #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ | |
114 | #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ | |
115 | #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ | |
116 | #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ | |
117 | #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ | |
118 | ||
119 | #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ | |
120 | #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ | |
121 | ||
122 | #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ | |
123 | SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ | |
124 | SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) | |
125 | #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) | |
126 | #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ | |
127 | SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) | |
128 | #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ | |
129 | SNDRV_PCM_RATE_192000) | |
130 | #define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8) | |
131 | #define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8) | |
132 | #define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE) | |
133 | #define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE) | |
134 | #define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE) | |
135 | #define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE) | |
136 | #define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE) | |
137 | #define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE) | |
138 | #define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE) | |
139 | #define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE) | |
140 | #define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE) | |
141 | #define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE) | |
142 | #define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE) | |
143 | #define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE) | |
144 | #define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE) | |
145 | #define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE) | |
146 | #define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE) | |
147 | #define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE) | |
148 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE) | |
149 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE) | |
150 | #define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW) | |
151 | #define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW) | |
152 | #define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM) | |
153 | #define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG) | |
154 | #define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM) | |
155 | #define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL) | |
156 | #define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE) | |
157 | #define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE) | |
158 | #define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE) | |
159 | #define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE) | |
160 | #define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE) | |
161 | #define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE) | |
162 | #define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE) | |
163 | #define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE) | |
164 | #define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE) | |
165 | #define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE) | |
166 | #define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE) | |
167 | #define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE) | |
168 | ||
169 | #ifdef SNDRV_LITTLE_ENDIAN | |
170 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE | |
171 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE | |
172 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE | |
173 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE | |
174 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE | |
175 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE | |
176 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE | |
177 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE | |
178 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | |
179 | #endif | |
180 | #ifdef SNDRV_BIG_ENDIAN | |
181 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE | |
182 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE | |
183 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE | |
184 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE | |
185 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE | |
186 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE | |
187 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE | |
188 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE | |
189 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE | |
190 | #endif | |
191 | ||
877211f5 TI |
192 | struct snd_pcm_file { |
193 | struct snd_pcm_substream *substream; | |
548a648b | 194 | int no_compat_mmap; |
1da177e4 LT |
195 | }; |
196 | ||
877211f5 TI |
197 | struct snd_pcm_hw_rule; |
198 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, | |
199 | struct snd_pcm_hw_rule *rule); | |
1da177e4 | 200 | |
877211f5 | 201 | struct snd_pcm_hw_rule { |
1da177e4 LT |
202 | unsigned int cond; |
203 | snd_pcm_hw_rule_func_t func; | |
204 | int var; | |
205 | int deps[4]; | |
206 | void *private; | |
207 | }; | |
208 | ||
877211f5 TI |
209 | struct snd_pcm_hw_constraints { |
210 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - | |
1da177e4 | 211 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
877211f5 | 212 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
1da177e4 LT |
213 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
214 | unsigned int rules_num; | |
215 | unsigned int rules_all; | |
877211f5 TI |
216 | struct snd_pcm_hw_rule *rules; |
217 | }; | |
1da177e4 | 218 | |
877211f5 TI |
219 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
220 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
221 | { |
222 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
223 | } | |
224 | ||
877211f5 TI |
225 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
226 | snd_pcm_hw_param_t var) | |
1da177e4 LT |
227 | { |
228 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
229 | } | |
230 | ||
877211f5 | 231 | struct snd_ratnum { |
1da177e4 LT |
232 | unsigned int num; |
233 | unsigned int den_min, den_max, den_step; | |
877211f5 | 234 | }; |
1da177e4 | 235 | |
877211f5 | 236 | struct snd_ratden { |
1da177e4 LT |
237 | unsigned int num_min, num_max, num_step; |
238 | unsigned int den; | |
877211f5 | 239 | }; |
1da177e4 | 240 | |
877211f5 | 241 | struct snd_pcm_hw_constraint_ratnums { |
1da177e4 | 242 | int nrats; |
877211f5 TI |
243 | struct snd_ratnum *rats; |
244 | }; | |
1da177e4 | 245 | |
877211f5 | 246 | struct snd_pcm_hw_constraint_ratdens { |
1da177e4 | 247 | int nrats; |
877211f5 TI |
248 | struct snd_ratden *rats; |
249 | }; | |
1da177e4 | 250 | |
877211f5 | 251 | struct snd_pcm_hw_constraint_list { |
1da177e4 LT |
252 | unsigned int count; |
253 | unsigned int *list; | |
254 | unsigned int mask; | |
877211f5 | 255 | }; |
1da177e4 | 256 | |
877211f5 | 257 | struct snd_pcm_runtime { |
1da177e4 | 258 | /* -- Status -- */ |
877211f5 | 259 | struct snd_pcm_substream *trigger_master; |
07799e75 | 260 | struct timespec trigger_tstamp; /* trigger timestamp */ |
1da177e4 LT |
261 | int overrange; |
262 | snd_pcm_uframes_t avail_max; | |
263 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ | |
264 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/ | |
265 | ||
266 | /* -- HW params -- */ | |
267 | snd_pcm_access_t access; /* access mode */ | |
268 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ | |
269 | snd_pcm_subformat_t subformat; /* subformat */ | |
270 | unsigned int rate; /* rate in Hz */ | |
271 | unsigned int channels; /* channels */ | |
272 | snd_pcm_uframes_t period_size; /* period size */ | |
273 | unsigned int periods; /* periods */ | |
274 | snd_pcm_uframes_t buffer_size; /* buffer size */ | |
275 | unsigned int tick_time; /* tick time */ | |
276 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ | |
277 | size_t byte_align; | |
278 | unsigned int frame_bits; | |
279 | unsigned int sample_bits; | |
280 | unsigned int info; | |
281 | unsigned int rate_num; | |
282 | unsigned int rate_den; | |
283 | ||
284 | /* -- SW params -- */ | |
877211f5 | 285 | int tstamp_mode; /* mmap timestamp is updated */ |
1da177e4 LT |
286 | unsigned int period_step; |
287 | unsigned int sleep_min; /* min ticks to sleep */ | |
288 | snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */ | |
289 | snd_pcm_uframes_t start_threshold; | |
290 | snd_pcm_uframes_t stop_threshold; | |
291 | snd_pcm_uframes_t silence_threshold; /* Silence filling happens when | |
292 | noise is nearest than this */ | |
293 | snd_pcm_uframes_t silence_size; /* Silence filling size */ | |
294 | snd_pcm_uframes_t boundary; /* pointers wrap point */ | |
295 | ||
296 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ | |
297 | snd_pcm_uframes_t silence_filled; /* size filled with silence */ | |
298 | ||
877211f5 | 299 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ |
1da177e4 LT |
300 | |
301 | /* -- mmap -- */ | |
877211f5 TI |
302 | volatile struct snd_pcm_mmap_status *status; |
303 | volatile struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
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) */ | |
9442e691 | 351 | char latency_id[20]; /* latency identifier */ |
1da177e4 LT |
352 | size_t buffer_bytes_max; /* limit ring buffer size */ |
353 | struct snd_dma_buffer dma_buffer; | |
354 | unsigned int dma_buf_id; | |
355 | size_t dma_max; | |
356 | /* -- hardware operations -- */ | |
877211f5 | 357 | struct snd_pcm_ops *ops; |
1da177e4 | 358 | /* -- runtime information -- */ |
877211f5 | 359 | struct snd_pcm_runtime *runtime; |
1da177e4 | 360 | /* -- timer section -- */ |
877211f5 | 361 | struct snd_timer *timer; /* timer */ |
1da177e4 LT |
362 | unsigned timer_running: 1; /* time is running */ |
363 | spinlock_t timer_lock; | |
364 | /* -- next substream -- */ | |
877211f5 | 365 | struct snd_pcm_substream *next; |
1da177e4 LT |
366 | /* -- linked substreams -- */ |
367 | struct list_head link_list; /* linked list member */ | |
877211f5 TI |
368 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ |
369 | struct snd_pcm_group *group; /* pointer to current group */ | |
1da177e4 | 370 | /* -- assigned files -- */ |
1576274d | 371 | void *file; |
0df63e44 | 372 | int ref_count; |
9c323fcb | 373 | atomic_t mmap_count; |
0df63e44 | 374 | unsigned int f_flags; |
3bf75f9b | 375 | void (*pcm_release)(struct snd_pcm_substream *); |
1da177e4 LT |
376 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
377 | /* -- OSS things -- */ | |
877211f5 | 378 | struct snd_pcm_oss_substream oss; |
1da177e4 | 379 | #endif |
b7d90a35 | 380 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
381 | struct snd_info_entry *proc_root; |
382 | struct snd_info_entry *proc_info_entry; | |
383 | struct snd_info_entry *proc_hw_params_entry; | |
384 | struct snd_info_entry *proc_sw_params_entry; | |
385 | struct snd_info_entry *proc_status_entry; | |
386 | struct snd_info_entry *proc_prealloc_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 | ||
2af677fc | 447 | extern 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 | ||
603 | #define snd_pcm_group_for_each(pos, substream) \ | |
604 | list_for_each(pos, &substream->group->substreams) | |
605 | ||
606 | #define snd_pcm_group_substream_entry(pos) \ | |
877211f5 | 607 | list_entry(pos, struct snd_pcm_substream, link_list) |
1da177e4 | 608 | |
877211f5 | 609 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
1da177e4 LT |
610 | { |
611 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
612 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
613 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); | |
614 | } | |
615 | ||
877211f5 | 616 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
617 | { |
618 | return size * 8 / runtime->sample_bits; | |
619 | } | |
620 | ||
877211f5 | 621 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
622 | { |
623 | return size * 8 / runtime->frame_bits; | |
624 | } | |
625 | ||
877211f5 | 626 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
627 | { |
628 | return size * runtime->sample_bits / 8; | |
629 | } | |
630 | ||
877211f5 | 631 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
1da177e4 LT |
632 | { |
633 | return size * runtime->frame_bits / 8; | |
634 | } | |
635 | ||
877211f5 | 636 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
1da177e4 LT |
637 | { |
638 | return bytes % runtime->byte_align == 0; | |
639 | } | |
640 | ||
877211f5 | 641 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 642 | { |
877211f5 | 643 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
644 | return frames_to_bytes(runtime, runtime->buffer_size); |
645 | } | |
646 | ||
877211f5 | 647 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 648 | { |
877211f5 | 649 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
650 | return frames_to_bytes(runtime, runtime->period_size); |
651 | } | |
652 | ||
653 | /* | |
654 | * result is: 0 ... (boundary - 1) | |
655 | */ | |
877211f5 | 656 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
657 | { |
658 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; | |
659 | if (avail < 0) | |
660 | avail += runtime->boundary; | |
661 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) | |
662 | avail -= runtime->boundary; | |
663 | return avail; | |
664 | } | |
665 | ||
666 | /* | |
667 | * result is: 0 ... (boundary - 1) | |
668 | */ | |
877211f5 | 669 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
670 | { |
671 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; | |
672 | if (avail < 0) | |
673 | avail += runtime->boundary; | |
674 | return avail; | |
675 | } | |
676 | ||
877211f5 | 677 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
678 | { |
679 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); | |
680 | } | |
681 | ||
877211f5 | 682 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
683 | { |
684 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); | |
685 | } | |
686 | ||
687 | /** | |
688 | * snd_pcm_playback_ready - check whether the playback buffer is available | |
689 | * @substream: the pcm substream instance | |
690 | * | |
691 | * Checks whether enough free space is available on the playback buffer. | |
692 | * | |
693 | * Returns non-zero if available, or zero if not. | |
694 | */ | |
877211f5 | 695 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
1da177e4 | 696 | { |
877211f5 | 697 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
698 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
699 | } | |
700 | ||
701 | /** | |
702 | * snd_pcm_capture_ready - check whether the capture buffer is available | |
703 | * @substream: the pcm substream instance | |
704 | * | |
705 | * Checks whether enough capture data is available on the capture buffer. | |
706 | * | |
707 | * Returns non-zero if available, or zero if not. | |
708 | */ | |
877211f5 | 709 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
1da177e4 | 710 | { |
877211f5 | 711 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
712 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
713 | } | |
714 | ||
715 | /** | |
716 | * snd_pcm_playback_data - check whether any data exists on the playback buffer | |
717 | * @substream: the pcm substream instance | |
718 | * | |
719 | * Checks whether any data exists on the playback buffer. If stop_threshold | |
720 | * is bigger or equal to boundary, then this function returns always non-zero. | |
721 | * | |
722 | * Returns non-zero if exists, or zero if not. | |
723 | */ | |
877211f5 | 724 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
1da177e4 | 725 | { |
877211f5 | 726 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
727 | |
728 | if (runtime->stop_threshold >= runtime->boundary) | |
729 | return 1; | |
730 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; | |
731 | } | |
732 | ||
733 | /** | |
734 | * snd_pcm_playback_empty - check whether the playback buffer is empty | |
735 | * @substream: the pcm substream instance | |
736 | * | |
737 | * Checks whether the playback buffer is empty. | |
738 | * | |
739 | * Returns non-zero if empty, or zero if not. | |
740 | */ | |
877211f5 | 741 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
1da177e4 | 742 | { |
877211f5 | 743 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
744 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
745 | } | |
746 | ||
747 | /** | |
748 | * snd_pcm_capture_empty - check whether the capture buffer is empty | |
749 | * @substream: the pcm substream instance | |
750 | * | |
751 | * Checks whether the capture buffer is empty. | |
752 | * | |
753 | * Returns non-zero if empty, or zero if not. | |
754 | */ | |
877211f5 | 755 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
1da177e4 | 756 | { |
877211f5 | 757 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
758 | return snd_pcm_capture_avail(runtime) == 0; |
759 | } | |
760 | ||
877211f5 TI |
761 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
762 | struct snd_pcm_substream *master) | |
1da177e4 LT |
763 | { |
764 | substream->runtime->trigger_master = master; | |
765 | } | |
766 | ||
767 | static inline int hw_is_mask(int var) | |
768 | { | |
769 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && | |
770 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; | |
771 | } | |
772 | ||
773 | static inline int hw_is_interval(int var) | |
774 | { | |
775 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && | |
776 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; | |
777 | } | |
778 | ||
877211f5 | 779 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
1da177e4 LT |
780 | snd_pcm_hw_param_t var) |
781 | { | |
782 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
783 | } | |
784 | ||
877211f5 | 785 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
1da177e4 LT |
786 | snd_pcm_hw_param_t var) |
787 | { | |
788 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
789 | } | |
790 | ||
877211f5 | 791 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
792 | snd_pcm_hw_param_t var) |
793 | { | |
877211f5 | 794 | return (const struct snd_mask *)hw_param_mask((struct snd_pcm_hw_params*) params, var); |
1da177e4 LT |
795 | } |
796 | ||
877211f5 | 797 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
798 | snd_pcm_hw_param_t var) |
799 | { | |
877211f5 | 800 | return (const struct snd_interval *)hw_param_interval((struct snd_pcm_hw_params*) params, var); |
1da177e4 LT |
801 | } |
802 | ||
803 | #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) | |
804 | #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) | |
805 | #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) | |
806 | #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min | |
807 | #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min | |
808 | #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min | |
809 | #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) | |
810 | #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min | |
811 | #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min | |
812 | #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min | |
813 | #define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min | |
814 | ||
815 | ||
877211f5 TI |
816 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
817 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
818 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
819 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, | |
820 | unsigned int k, struct snd_interval *c); | |
821 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, | |
822 | const struct snd_interval *b, struct snd_interval *c); | |
823 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); | |
824 | int snd_interval_ratnum(struct snd_interval *i, | |
825 | unsigned int rats_count, struct snd_ratnum *rats, | |
1da177e4 LT |
826 | unsigned int *nump, unsigned int *denp); |
827 | ||
877211f5 TI |
828 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
829 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); | |
877211f5 | 830 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 831 | |
877211f5 | 832 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 833 | |
877211f5 TI |
834 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
835 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); | |
1da177e4 | 836 | |
877211f5 | 837 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 838 | u_int32_t mask); |
877211f5 | 839 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 840 | u_int64_t mask); |
877211f5 | 841 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 842 | unsigned int min, unsigned int max); |
877211f5 TI |
843 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
844 | int snd_pcm_hw_constraint_list(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_list *l); |
848 | int snd_pcm_hw_constraint_ratnums(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_ratnums *r); |
852 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
853 | unsigned int cond, |
854 | snd_pcm_hw_param_t var, | |
877211f5 TI |
855 | struct snd_pcm_hw_constraint_ratdens *r); |
856 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
857 | unsigned int cond, |
858 | unsigned int width, | |
859 | unsigned int msbits); | |
877211f5 | 860 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
861 | unsigned int cond, |
862 | snd_pcm_hw_param_t var, | |
863 | unsigned long step); | |
877211f5 | 864 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
865 | unsigned int cond, |
866 | snd_pcm_hw_param_t var); | |
877211f5 | 867 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
868 | unsigned int cond, |
869 | int var, | |
870 | snd_pcm_hw_rule_func_t func, void *private, | |
871 | int dep, ...); | |
872 | ||
873 | int snd_pcm_format_signed(snd_pcm_format_t format); | |
874 | int snd_pcm_format_unsigned(snd_pcm_format_t format); | |
875 | int snd_pcm_format_linear(snd_pcm_format_t format); | |
876 | int snd_pcm_format_little_endian(snd_pcm_format_t format); | |
877 | int snd_pcm_format_big_endian(snd_pcm_format_t format); | |
1b44c28d TI |
878 | #if 0 /* just for DocBook */ |
879 | /** | |
9502dcad TI |
880 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
881 | * @format: the format to check | |
882 | * | |
883 | * Returns 1 if the given PCM format is CPU-endian, 0 if | |
884 | * opposite, or a negative error code if endian not specified. | |
885 | */ | |
8cdfd251 | 886 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
1b44c28d | 887 | #endif /* DocBook */ |
9502dcad | 888 | #ifdef SNDRV_LITTLE_ENDIAN |
9d01a82e | 889 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
9502dcad | 890 | #else |
9d01a82e | 891 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
9502dcad | 892 | #endif |
1da177e4 LT |
893 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
894 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ | |
9502dcad | 895 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
1da177e4 LT |
896 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
897 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); | |
898 | snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); | |
1da177e4 | 899 | |
877211f5 TI |
900 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); |
901 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); | |
902 | int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); | |
903 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, | |
1da177e4 | 904 | unsigned int cmd, void *arg); |
877211f5 TI |
905 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
906 | int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); | |
907 | int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); | |
908 | int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); | |
909 | int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); | |
910 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); | |
911 | void snd_pcm_tick_prepare(struct snd_pcm_substream *substream); | |
912 | void snd_pcm_tick_set(struct snd_pcm_substream *substream, unsigned long ticks); | |
913 | void snd_pcm_tick_elapsed(struct snd_pcm_substream *substream); | |
914 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); | |
915 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, | |
1da177e4 LT |
916 | const void __user *buf, |
917 | snd_pcm_uframes_t frames); | |
877211f5 | 918 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
1da177e4 | 919 | void __user *buf, snd_pcm_uframes_t frames); |
877211f5 | 920 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 | 921 | void __user **bufs, snd_pcm_uframes_t frames); |
877211f5 | 922 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
923 | void __user **bufs, snd_pcm_uframes_t frames); |
924 | ||
877211f5 | 925 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
1da177e4 | 926 | |
877211f5 | 927 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
1da177e4 LT |
928 | struct snd_dma_buffer *bufp) |
929 | { | |
877211f5 | 930 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
931 | if (bufp) { |
932 | runtime->dma_buffer_p = bufp; | |
933 | runtime->dma_area = bufp->area; | |
934 | runtime->dma_addr = bufp->addr; | |
935 | runtime->dma_bytes = bufp->bytes; | |
936 | } else { | |
937 | runtime->dma_buffer_p = NULL; | |
938 | runtime->dma_area = NULL; | |
939 | runtime->dma_addr = 0; | |
940 | runtime->dma_bytes = 0; | |
941 | } | |
942 | } | |
943 | ||
944 | /* | |
945 | * Timer interface | |
946 | */ | |
947 | ||
877211f5 TI |
948 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
949 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); | |
950 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); | |
1da177e4 LT |
951 | |
952 | /* | |
953 | * Memory | |
954 | */ | |
955 | ||
877211f5 TI |
956 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
957 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); | |
958 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, | |
1da177e4 LT |
959 | int type, struct device *data, |
960 | size_t size, size_t max); | |
877211f5 | 961 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
1da177e4 LT |
962 | int type, void *data, |
963 | size_t size, size_t max); | |
877211f5 TI |
964 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
965 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); | |
1da177e4 LT |
966 | |
967 | #define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data) | |
968 | #define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size) | |
969 | #define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs) | |
877211f5 | 970 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset); |
1da177e4 LT |
971 | |
972 | /* handle mmap counter - PCM mmap callback should handle this counter properly */ | |
973 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) | |
974 | { | |
877211f5 | 975 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 976 | atomic_inc(&substream->mmap_count); |
1da177e4 LT |
977 | } |
978 | ||
979 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) | |
980 | { | |
877211f5 | 981 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 982 | atomic_dec(&substream->mmap_count); |
1da177e4 LT |
983 | } |
984 | ||
985 | /* mmap for io-memory area */ | |
986 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
987 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP | |
877211f5 | 988 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
1da177e4 LT |
989 | #else |
990 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 | |
991 | #define snd_pcm_lib_mmap_iomem NULL | |
992 | #endif | |
993 | ||
994 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) | |
995 | { | |
996 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; | |
997 | } | |
998 | ||
999 | /* | |
1000 | * Misc | |
1001 | */ | |
1002 | ||
1003 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ | |
1004 | (IEC958_AES1_CON_ORIGINAL<<8)|\ | |
1005 | (IEC958_AES1_CON_PCM_CODER<<8)|\ | |
1006 | (IEC958_AES3_CON_FS_48000<<24)) | |
1007 | ||
1008 | #endif /* __SOUND_PCM_H */ |