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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> | |
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; | |
c7132aeb | 387 | struct snd_info_entry *proc_prealloc_max_entry; |
b7d90a35 | 388 | #endif |
1da177e4 | 389 | /* misc flags */ |
3bf75f9b | 390 | unsigned int hw_opened: 1; |
1da177e4 LT |
391 | }; |
392 | ||
0df63e44 | 393 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
1da177e4 LT |
394 | |
395 | ||
877211f5 | 396 | struct snd_pcm_str { |
1da177e4 | 397 | int stream; /* stream (direction) */ |
877211f5 | 398 | struct snd_pcm *pcm; |
1da177e4 LT |
399 | /* -- substreams -- */ |
400 | unsigned int substream_count; | |
401 | unsigned int substream_opened; | |
877211f5 | 402 | struct snd_pcm_substream *substream; |
1da177e4 LT |
403 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
404 | /* -- OSS things -- */ | |
877211f5 | 405 | struct snd_pcm_oss_stream oss; |
1da177e4 | 406 | #endif |
b7d90a35 | 407 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
877211f5 TI |
408 | struct snd_info_entry *proc_root; |
409 | struct snd_info_entry *proc_info_entry; | |
b7d90a35 | 410 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
1da177e4 | 411 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ |
877211f5 | 412 | struct snd_info_entry *proc_xrun_debug_entry; |
1da177e4 | 413 | #endif |
b7d90a35 | 414 | #endif |
1da177e4 LT |
415 | }; |
416 | ||
877211f5 TI |
417 | struct snd_pcm { |
418 | struct snd_card *card; | |
f87135f5 | 419 | struct list_head list; |
1da177e4 LT |
420 | unsigned int device; /* device number */ |
421 | unsigned int info_flags; | |
422 | unsigned short dev_class; | |
423 | unsigned short dev_subclass; | |
424 | char id[64]; | |
425 | char name[80]; | |
877211f5 | 426 | struct snd_pcm_str streams[2]; |
1a60d4c5 | 427 | struct mutex open_mutex; |
1da177e4 LT |
428 | wait_queue_head_t open_wait; |
429 | void *private_data; | |
877211f5 | 430 | void (*private_free) (struct snd_pcm *pcm); |
c78085fc | 431 | struct device *dev; /* actual hw device this belongs to */ |
1da177e4 | 432 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 433 | struct snd_pcm_oss oss; |
1da177e4 LT |
434 | #endif |
435 | }; | |
436 | ||
877211f5 TI |
437 | struct snd_pcm_notify { |
438 | int (*n_register) (struct snd_pcm * pcm); | |
439 | int (*n_disconnect) (struct snd_pcm * pcm); | |
440 | int (*n_unregister) (struct snd_pcm * pcm); | |
1da177e4 | 441 | struct list_head list; |
877211f5 | 442 | }; |
1da177e4 LT |
443 | |
444 | /* | |
445 | * Registering | |
446 | */ | |
447 | ||
2af677fc | 448 | extern struct file_operations snd_pcm_f_ops[2]; |
1da177e4 | 449 | |
877211f5 | 450 | int snd_pcm_new(struct snd_card *card, char *id, int device, |
1da177e4 | 451 | int playback_count, int capture_count, |
877211f5 TI |
452 | struct snd_pcm **rpcm); |
453 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); | |
1da177e4 | 454 | |
877211f5 | 455 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
1da177e4 LT |
456 | |
457 | /* | |
458 | * Native I/O | |
459 | */ | |
460 | ||
461 | extern rwlock_t snd_pcm_link_rwlock; | |
462 | ||
877211f5 TI |
463 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
464 | int snd_pcm_info_user(struct snd_pcm_substream *substream, | |
465 | struct snd_pcm_info __user *info); | |
466 | int snd_pcm_status(struct snd_pcm_substream *substream, | |
467 | struct snd_pcm_status *status); | |
877211f5 TI |
468 | int snd_pcm_start(struct snd_pcm_substream *substream); |
469 | int snd_pcm_stop(struct snd_pcm_substream *substream, int status); | |
470 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); | |
1da177e4 | 471 | #ifdef CONFIG_PM |
877211f5 TI |
472 | int snd_pcm_suspend(struct snd_pcm_substream *substream); |
473 | int snd_pcm_suspend_all(struct snd_pcm *pcm); | |
1da177e4 | 474 | #endif |
877211f5 | 475 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); |
3bf75f9b TI |
476 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, |
477 | struct snd_pcm_substream **rsubstream); | |
877211f5 | 478 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); |
3bf75f9b TI |
479 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, |
480 | struct snd_pcm_substream **rsubstream); | |
481 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); | |
1da177e4 | 482 | void snd_pcm_vma_notify_data(void *client, void *data); |
877211f5 | 483 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); |
1da177e4 LT |
484 | |
485 | #if BITS_PER_LONG >= 64 | |
486 | ||
487 | static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) | |
488 | { | |
489 | *rem = *n % div; | |
490 | *n /= div; | |
491 | } | |
492 | ||
493 | #elif defined(i386) | |
494 | ||
495 | static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) | |
496 | { | |
497 | u_int32_t low, high; | |
498 | low = *n & 0xffffffff; | |
499 | high = *n >> 32; | |
500 | if (high) { | |
501 | u_int32_t high1 = high % div; | |
502 | high /= div; | |
503 | asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1)); | |
504 | *n = (u_int64_t)high << 32 | low; | |
505 | } else { | |
506 | *n = low / div; | |
507 | *rem = low % div; | |
508 | } | |
509 | } | |
510 | #else | |
511 | ||
512 | static inline void divl(u_int32_t high, u_int32_t low, | |
513 | u_int32_t div, | |
514 | u_int32_t *q, u_int32_t *r) | |
515 | { | |
516 | u_int64_t n = (u_int64_t)high << 32 | low; | |
517 | u_int64_t d = (u_int64_t)div << 31; | |
518 | u_int32_t q1 = 0; | |
519 | int c = 32; | |
520 | while (n > 0xffffffffU) { | |
521 | q1 <<= 1; | |
522 | if (n >= d) { | |
523 | n -= d; | |
524 | q1 |= 1; | |
525 | } | |
526 | d >>= 1; | |
527 | c--; | |
528 | } | |
529 | q1 <<= c; | |
530 | if (n) { | |
531 | low = n; | |
532 | *q = q1 | (low / div); | |
533 | *r = low % div; | |
534 | } else { | |
535 | *r = 0; | |
536 | *q = q1; | |
537 | } | |
538 | return; | |
539 | } | |
540 | ||
541 | static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) | |
542 | { | |
543 | u_int32_t low, high; | |
544 | low = *n & 0xffffffff; | |
545 | high = *n >> 32; | |
546 | if (high) { | |
547 | u_int32_t high1 = high % div; | |
548 | u_int32_t low1 = low; | |
549 | high /= div; | |
550 | divl(high1, low1, div, &low, rem); | |
551 | *n = (u_int64_t)high << 32 | low; | |
552 | } else { | |
553 | *n = low / div; | |
554 | *rem = low % div; | |
555 | } | |
556 | } | |
557 | #endif | |
558 | ||
559 | /* | |
560 | * PCM library | |
561 | */ | |
562 | ||
877211f5 | 563 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) |
1da177e4 LT |
564 | { |
565 | return substream->group != &substream->self_group; | |
566 | } | |
567 | ||
877211f5 | 568 | static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
1da177e4 LT |
569 | { |
570 | read_lock(&snd_pcm_link_rwlock); | |
571 | spin_lock(&substream->self_group.lock); | |
572 | } | |
573 | ||
877211f5 | 574 | static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
1da177e4 LT |
575 | { |
576 | spin_unlock(&substream->self_group.lock); | |
577 | read_unlock(&snd_pcm_link_rwlock); | |
578 | } | |
579 | ||
877211f5 | 580 | static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
1da177e4 LT |
581 | { |
582 | read_lock_irq(&snd_pcm_link_rwlock); | |
583 | spin_lock(&substream->self_group.lock); | |
584 | } | |
585 | ||
877211f5 | 586 | static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
1da177e4 LT |
587 | { |
588 | spin_unlock(&substream->self_group.lock); | |
589 | read_unlock_irq(&snd_pcm_link_rwlock); | |
590 | } | |
591 | ||
592 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ | |
593 | do { \ | |
594 | read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ | |
595 | spin_lock(&substream->self_group.lock); \ | |
596 | } while (0) | |
597 | ||
598 | #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ | |
599 | do { \ | |
600 | spin_unlock(&substream->self_group.lock); \ | |
601 | read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ | |
602 | } while (0) | |
603 | ||
604 | #define snd_pcm_group_for_each(pos, substream) \ | |
605 | list_for_each(pos, &substream->group->substreams) | |
606 | ||
607 | #define snd_pcm_group_substream_entry(pos) \ | |
877211f5 | 608 | list_entry(pos, struct snd_pcm_substream, link_list) |
1da177e4 | 609 | |
877211f5 | 610 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
1da177e4 LT |
611 | { |
612 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
613 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
614 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); | |
615 | } | |
616 | ||
877211f5 | 617 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
618 | { |
619 | return size * 8 / runtime->sample_bits; | |
620 | } | |
621 | ||
877211f5 | 622 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
623 | { |
624 | return size * 8 / runtime->frame_bits; | |
625 | } | |
626 | ||
877211f5 | 627 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
1da177e4 LT |
628 | { |
629 | return size * runtime->sample_bits / 8; | |
630 | } | |
631 | ||
877211f5 | 632 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
1da177e4 LT |
633 | { |
634 | return size * runtime->frame_bits / 8; | |
635 | } | |
636 | ||
877211f5 | 637 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
1da177e4 LT |
638 | { |
639 | return bytes % runtime->byte_align == 0; | |
640 | } | |
641 | ||
877211f5 | 642 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 643 | { |
877211f5 | 644 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
645 | return frames_to_bytes(runtime, runtime->buffer_size); |
646 | } | |
647 | ||
877211f5 | 648 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
1da177e4 | 649 | { |
877211f5 | 650 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
651 | return frames_to_bytes(runtime, runtime->period_size); |
652 | } | |
653 | ||
654 | /* | |
655 | * result is: 0 ... (boundary - 1) | |
656 | */ | |
877211f5 | 657 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
658 | { |
659 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; | |
660 | if (avail < 0) | |
661 | avail += runtime->boundary; | |
662 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) | |
663 | avail -= runtime->boundary; | |
664 | return avail; | |
665 | } | |
666 | ||
667 | /* | |
668 | * result is: 0 ... (boundary - 1) | |
669 | */ | |
877211f5 | 670 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
671 | { |
672 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; | |
673 | if (avail < 0) | |
674 | avail += runtime->boundary; | |
675 | return avail; | |
676 | } | |
677 | ||
877211f5 | 678 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
679 | { |
680 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); | |
681 | } | |
682 | ||
877211f5 | 683 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
684 | { |
685 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); | |
686 | } | |
687 | ||
688 | /** | |
689 | * snd_pcm_playback_ready - check whether the playback buffer is available | |
690 | * @substream: the pcm substream instance | |
691 | * | |
692 | * Checks whether enough free space is available on the playback buffer. | |
693 | * | |
694 | * Returns non-zero if available, or zero if not. | |
695 | */ | |
877211f5 | 696 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
1da177e4 | 697 | { |
877211f5 | 698 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
699 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
700 | } | |
701 | ||
702 | /** | |
703 | * snd_pcm_capture_ready - check whether the capture buffer is available | |
704 | * @substream: the pcm substream instance | |
705 | * | |
706 | * Checks whether enough capture data is available on the capture buffer. | |
707 | * | |
708 | * Returns non-zero if available, or zero if not. | |
709 | */ | |
877211f5 | 710 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
1da177e4 | 711 | { |
877211f5 | 712 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
713 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
714 | } | |
715 | ||
716 | /** | |
717 | * snd_pcm_playback_data - check whether any data exists on the playback buffer | |
718 | * @substream: the pcm substream instance | |
719 | * | |
720 | * Checks whether any data exists on the playback buffer. If stop_threshold | |
721 | * is bigger or equal to boundary, then this function returns always non-zero. | |
722 | * | |
723 | * Returns non-zero if exists, or zero if not. | |
724 | */ | |
877211f5 | 725 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
1da177e4 | 726 | { |
877211f5 | 727 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
728 | |
729 | if (runtime->stop_threshold >= runtime->boundary) | |
730 | return 1; | |
731 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; | |
732 | } | |
733 | ||
734 | /** | |
735 | * snd_pcm_playback_empty - check whether the playback buffer is empty | |
736 | * @substream: the pcm substream instance | |
737 | * | |
738 | * Checks whether the playback buffer is empty. | |
739 | * | |
740 | * Returns non-zero if empty, or zero if not. | |
741 | */ | |
877211f5 | 742 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
1da177e4 | 743 | { |
877211f5 | 744 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
745 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
746 | } | |
747 | ||
748 | /** | |
749 | * snd_pcm_capture_empty - check whether the capture buffer is empty | |
750 | * @substream: the pcm substream instance | |
751 | * | |
752 | * Checks whether the capture buffer is empty. | |
753 | * | |
754 | * Returns non-zero if empty, or zero if not. | |
755 | */ | |
877211f5 | 756 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
1da177e4 | 757 | { |
877211f5 | 758 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
759 | return snd_pcm_capture_avail(runtime) == 0; |
760 | } | |
761 | ||
877211f5 TI |
762 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
763 | struct snd_pcm_substream *master) | |
1da177e4 LT |
764 | { |
765 | substream->runtime->trigger_master = master; | |
766 | } | |
767 | ||
768 | static inline int hw_is_mask(int var) | |
769 | { | |
770 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && | |
771 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; | |
772 | } | |
773 | ||
774 | static inline int hw_is_interval(int var) | |
775 | { | |
776 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && | |
777 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; | |
778 | } | |
779 | ||
877211f5 | 780 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
1da177e4 LT |
781 | snd_pcm_hw_param_t var) |
782 | { | |
783 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; | |
784 | } | |
785 | ||
877211f5 | 786 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
1da177e4 LT |
787 | snd_pcm_hw_param_t var) |
788 | { | |
789 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; | |
790 | } | |
791 | ||
877211f5 | 792 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
793 | snd_pcm_hw_param_t var) |
794 | { | |
877211f5 | 795 | return (const struct snd_mask *)hw_param_mask((struct snd_pcm_hw_params*) params, var); |
1da177e4 LT |
796 | } |
797 | ||
877211f5 | 798 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
799 | snd_pcm_hw_param_t var) |
800 | { | |
877211f5 | 801 | return (const struct snd_interval *)hw_param_interval((struct snd_pcm_hw_params*) params, var); |
1da177e4 LT |
802 | } |
803 | ||
804 | #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) | |
805 | #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) | |
806 | #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) | |
807 | #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min | |
808 | #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min | |
809 | #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min | |
810 | #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) | |
811 | #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min | |
812 | #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min | |
813 | #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min | |
814 | #define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min | |
815 | ||
816 | ||
877211f5 TI |
817 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
818 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
819 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); | |
820 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, | |
821 | unsigned int k, struct snd_interval *c); | |
822 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, | |
823 | const struct snd_interval *b, struct snd_interval *c); | |
824 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); | |
825 | int snd_interval_ratnum(struct snd_interval *i, | |
826 | unsigned int rats_count, struct snd_ratnum *rats, | |
1da177e4 LT |
827 | unsigned int *nump, unsigned int *denp); |
828 | ||
877211f5 TI |
829 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
830 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); | |
877211f5 | 831 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 832 | |
877211f5 | 833 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
1da177e4 | 834 | |
877211f5 TI |
835 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
836 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); | |
1da177e4 | 837 | |
877211f5 | 838 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 839 | u_int32_t mask); |
877211f5 | 840 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 841 | u_int64_t mask); |
877211f5 | 842 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 | 843 | unsigned int min, unsigned int max); |
877211f5 TI |
844 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
845 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
846 | unsigned int cond, |
847 | snd_pcm_hw_param_t var, | |
877211f5 TI |
848 | struct snd_pcm_hw_constraint_list *l); |
849 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
850 | unsigned int cond, |
851 | snd_pcm_hw_param_t var, | |
877211f5 TI |
852 | struct snd_pcm_hw_constraint_ratnums *r); |
853 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
854 | unsigned int cond, |
855 | snd_pcm_hw_param_t var, | |
877211f5 TI |
856 | struct snd_pcm_hw_constraint_ratdens *r); |
857 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, | |
1da177e4 LT |
858 | unsigned int cond, |
859 | unsigned int width, | |
860 | unsigned int msbits); | |
877211f5 | 861 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
862 | unsigned int cond, |
863 | snd_pcm_hw_param_t var, | |
864 | unsigned long step); | |
877211f5 | 865 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
866 | unsigned int cond, |
867 | snd_pcm_hw_param_t var); | |
877211f5 | 868 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
869 | unsigned int cond, |
870 | int var, | |
871 | snd_pcm_hw_rule_func_t func, void *private, | |
872 | int dep, ...); | |
873 | ||
874 | int snd_pcm_format_signed(snd_pcm_format_t format); | |
875 | int snd_pcm_format_unsigned(snd_pcm_format_t format); | |
876 | int snd_pcm_format_linear(snd_pcm_format_t format); | |
877 | int snd_pcm_format_little_endian(snd_pcm_format_t format); | |
878 | int snd_pcm_format_big_endian(snd_pcm_format_t format); | |
1b44c28d TI |
879 | #if 0 /* just for DocBook */ |
880 | /** | |
9502dcad TI |
881 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
882 | * @format: the format to check | |
883 | * | |
884 | * Returns 1 if the given PCM format is CPU-endian, 0 if | |
885 | * opposite, or a negative error code if endian not specified. | |
886 | */ | |
8cdfd251 | 887 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
1b44c28d | 888 | #endif /* DocBook */ |
9502dcad | 889 | #ifdef SNDRV_LITTLE_ENDIAN |
9d01a82e | 890 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
9502dcad | 891 | #else |
9d01a82e | 892 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
9502dcad | 893 | #endif |
1da177e4 LT |
894 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
895 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ | |
9502dcad | 896 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
1da177e4 LT |
897 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
898 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); | |
899 | snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); | |
1da177e4 | 900 | |
877211f5 TI |
901 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); |
902 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); | |
903 | int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); | |
904 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, | |
1da177e4 | 905 | unsigned int cmd, void *arg); |
877211f5 TI |
906 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
907 | int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); | |
908 | int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); | |
909 | int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); | |
910 | int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); | |
911 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); | |
912 | void snd_pcm_tick_prepare(struct snd_pcm_substream *substream); | |
913 | void snd_pcm_tick_set(struct snd_pcm_substream *substream, unsigned long ticks); | |
914 | void snd_pcm_tick_elapsed(struct snd_pcm_substream *substream); | |
915 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); | |
916 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, | |
1da177e4 LT |
917 | const void __user *buf, |
918 | snd_pcm_uframes_t frames); | |
877211f5 | 919 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
1da177e4 | 920 | void __user *buf, snd_pcm_uframes_t frames); |
877211f5 | 921 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 | 922 | void __user **bufs, snd_pcm_uframes_t frames); |
877211f5 | 923 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
924 | void __user **bufs, snd_pcm_uframes_t frames); |
925 | ||
877211f5 | 926 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
1da177e4 | 927 | |
877211f5 | 928 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
1da177e4 LT |
929 | struct snd_dma_buffer *bufp) |
930 | { | |
877211f5 | 931 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
932 | if (bufp) { |
933 | runtime->dma_buffer_p = bufp; | |
934 | runtime->dma_area = bufp->area; | |
935 | runtime->dma_addr = bufp->addr; | |
936 | runtime->dma_bytes = bufp->bytes; | |
937 | } else { | |
938 | runtime->dma_buffer_p = NULL; | |
939 | runtime->dma_area = NULL; | |
940 | runtime->dma_addr = 0; | |
941 | runtime->dma_bytes = 0; | |
942 | } | |
943 | } | |
944 | ||
945 | /* | |
946 | * Timer interface | |
947 | */ | |
948 | ||
877211f5 TI |
949 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
950 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); | |
951 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); | |
1da177e4 LT |
952 | |
953 | /* | |
954 | * Memory | |
955 | */ | |
956 | ||
877211f5 TI |
957 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
958 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); | |
959 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, | |
1da177e4 LT |
960 | int type, struct device *data, |
961 | size_t size, size_t max); | |
877211f5 | 962 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
1da177e4 LT |
963 | int type, void *data, |
964 | size_t size, size_t max); | |
877211f5 TI |
965 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
966 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); | |
1da177e4 LT |
967 | |
968 | #define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data) | |
969 | #define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size) | |
970 | #define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs) | |
877211f5 | 971 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset); |
1da177e4 LT |
972 | |
973 | /* handle mmap counter - PCM mmap callback should handle this counter properly */ | |
974 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) | |
975 | { | |
877211f5 | 976 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 977 | atomic_inc(&substream->mmap_count); |
1da177e4 LT |
978 | } |
979 | ||
980 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) | |
981 | { | |
877211f5 | 982 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
9c323fcb | 983 | atomic_dec(&substream->mmap_count); |
1da177e4 LT |
984 | } |
985 | ||
986 | /* mmap for io-memory area */ | |
987 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
988 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP | |
877211f5 | 989 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
1da177e4 LT |
990 | #else |
991 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 | |
992 | #define snd_pcm_lib_mmap_iomem NULL | |
993 | #endif | |
994 | ||
995 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) | |
996 | { | |
997 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; | |
998 | } | |
999 | ||
1000 | /* | |
1001 | * Misc | |
1002 | */ | |
1003 | ||
1004 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ | |
1005 | (IEC958_AES1_CON_ORIGINAL<<8)|\ | |
1006 | (IEC958_AES1_CON_PCM_CODER<<8)|\ | |
1007 | (IEC958_AES3_CON_FS_48000<<24)) | |
1008 | ||
1009 | #endif /* __SOUND_PCM_H */ |