1
2#ifndef __SOUND_PCM_H
3#define __SOUND_PCM_H
4
5
6
7
8
9
10
11#include <sound/asound.h>
12#include <sound/memalloc.h>
13#include <sound/minors.h>
14#include <linux/poll.h>
15#include <linux/mm.h>
16#include <linux/bitops.h>
17#include <linux/pm_qos.h>
18#include <linux/refcount.h>
19
20#define snd_pcm_substream_chip(substream) ((substream)->private_data)
21#define snd_pcm_chip(pcm) ((pcm)->private_data)
22
23#if IS_ENABLED(CONFIG_SND_PCM_OSS)
24#include <sound/pcm_oss.h>
25#endif
26
27
28
29
30
31struct snd_pcm_hardware {
32 unsigned int info;
33 u64 formats;
34 unsigned int rates;
35 unsigned int rate_min;
36 unsigned int rate_max;
37 unsigned int channels_min;
38 unsigned int channels_max;
39 size_t buffer_bytes_max;
40 size_t period_bytes_min;
41 size_t period_bytes_max;
42 unsigned int periods_min;
43 unsigned int periods_max;
44 size_t fifo_size;
45};
46
47struct snd_pcm_substream;
48
49struct snd_pcm_audio_tstamp_config;
50struct snd_pcm_audio_tstamp_report;
51
52struct snd_pcm_ops {
53 int (*open)(struct snd_pcm_substream *substream);
54 int (*close)(struct snd_pcm_substream *substream);
55 int (*ioctl)(struct snd_pcm_substream * substream,
56 unsigned int cmd, void *arg);
57 int (*hw_params)(struct snd_pcm_substream *substream,
58 struct snd_pcm_hw_params *params);
59 int (*hw_free)(struct snd_pcm_substream *substream);
60 int (*prepare)(struct snd_pcm_substream *substream);
61 int (*trigger)(struct snd_pcm_substream *substream, int cmd);
62 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
63 int (*get_time_info)(struct snd_pcm_substream *substream,
64 struct timespec *system_ts, struct timespec *audio_ts,
65 struct snd_pcm_audio_tstamp_config *audio_tstamp_config,
66 struct snd_pcm_audio_tstamp_report *audio_tstamp_report);
67 int (*fill_silence)(struct snd_pcm_substream *substream, int channel,
68 unsigned long pos, unsigned long bytes);
69 int (*copy_user)(struct snd_pcm_substream *substream, int channel,
70 unsigned long pos, void __user *buf,
71 unsigned long bytes);
72 int (*copy_kernel)(struct snd_pcm_substream *substream, int channel,
73 unsigned long pos, void *buf, unsigned long bytes);
74 struct page *(*page)(struct snd_pcm_substream *substream,
75 unsigned long offset);
76 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
77 int (*ack)(struct snd_pcm_substream *substream);
78};
79
80
81
82
83
84#if defined(CONFIG_SND_DYNAMIC_MINORS)
85#define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2)
86#else
87#define SNDRV_PCM_DEVICES 8
88#endif
89
90#define SNDRV_PCM_IOCTL1_RESET 0
91
92#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
93
94#define SNDRV_PCM_IOCTL1_FIFO_SIZE 4
95
96#define SNDRV_PCM_TRIGGER_STOP 0
97#define SNDRV_PCM_TRIGGER_START 1
98#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
99#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
100#define SNDRV_PCM_TRIGGER_SUSPEND 5
101#define SNDRV_PCM_TRIGGER_RESUME 6
102#define SNDRV_PCM_TRIGGER_DRAIN 7
103
104#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
105
106
107#define SNDRV_PCM_RATE_5512 (1<<0)
108#define SNDRV_PCM_RATE_8000 (1<<1)
109#define SNDRV_PCM_RATE_11025 (1<<2)
110#define SNDRV_PCM_RATE_16000 (1<<3)
111#define SNDRV_PCM_RATE_22050 (1<<4)
112#define SNDRV_PCM_RATE_32000 (1<<5)
113#define SNDRV_PCM_RATE_44100 (1<<6)
114#define SNDRV_PCM_RATE_48000 (1<<7)
115#define SNDRV_PCM_RATE_64000 (1<<8)
116#define SNDRV_PCM_RATE_88200 (1<<9)
117#define SNDRV_PCM_RATE_96000 (1<<10)
118#define SNDRV_PCM_RATE_176400 (1<<11)
119#define SNDRV_PCM_RATE_192000 (1<<12)
120
121#define SNDRV_PCM_RATE_CONTINUOUS (1<<30)
122#define SNDRV_PCM_RATE_KNOT (1<<31)
123
124#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
125 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
126 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
127#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
128#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
129 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
130#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
131 SNDRV_PCM_RATE_192000)
132#define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt)
133#define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8)
134#define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8)
135#define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE)
136#define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE)
137#define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE)
138#define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE)
139#define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE)
140#define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE)
141#define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE)
142#define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE)
143#define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE)
144#define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE)
145#define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE)
146#define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE)
147#define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE)
148#define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE)
149#define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE)
150#define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE)
151#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE)
152#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE)
153#define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW)
154#define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW)
155#define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM)
156#define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG)
157#define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM)
158#define SNDRV_PCM_FMTBIT_S20_LE _SNDRV_PCM_FMTBIT(S20_LE)
159#define SNDRV_PCM_FMTBIT_U20_LE _SNDRV_PCM_FMTBIT(U20_LE)
160#define SNDRV_PCM_FMTBIT_S20_BE _SNDRV_PCM_FMTBIT(S20_BE)
161#define SNDRV_PCM_FMTBIT_U20_BE _SNDRV_PCM_FMTBIT(U20_BE)
162#define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL)
163#define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE)
164#define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE)
165#define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE)
166#define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE)
167#define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE)
168#define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE)
169#define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE)
170#define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE)
171#define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE)
172#define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE)
173#define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE)
174#define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE)
175#define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24)
176#define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B)
177#define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40)
178#define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B)
179#define SNDRV_PCM_FMTBIT_DSD_U8 _SNDRV_PCM_FMTBIT(DSD_U8)
180#define SNDRV_PCM_FMTBIT_DSD_U16_LE _SNDRV_PCM_FMTBIT(DSD_U16_LE)
181#define SNDRV_PCM_FMTBIT_DSD_U32_LE _SNDRV_PCM_FMTBIT(DSD_U32_LE)
182#define SNDRV_PCM_FMTBIT_DSD_U16_BE _SNDRV_PCM_FMTBIT(DSD_U16_BE)
183#define SNDRV_PCM_FMTBIT_DSD_U32_BE _SNDRV_PCM_FMTBIT(DSD_U32_BE)
184
185#ifdef SNDRV_LITTLE_ENDIAN
186#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
187#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
188#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
189#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
190#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
191#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
192#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
193#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
194#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
195#define SNDRV_PCM_FMTBIT_S20 SNDRV_PCM_FMTBIT_S20_LE
196#define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_LE
197#endif
198#ifdef SNDRV_BIG_ENDIAN
199#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
200#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
201#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
202#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
203#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
204#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
205#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
206#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
207#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
208#define SNDRV_PCM_FMTBIT_S20 SNDRV_PCM_FMTBIT_S20_BE
209#define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_BE
210#endif
211
212struct snd_pcm_file {
213 struct snd_pcm_substream *substream;
214 int no_compat_mmap;
215 unsigned int user_pversion;
216};
217
218struct snd_pcm_hw_rule;
219typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
220 struct snd_pcm_hw_rule *rule);
221
222struct snd_pcm_hw_rule {
223 unsigned int cond;
224 int var;
225 int deps[4];
226
227 snd_pcm_hw_rule_func_t func;
228 void *private;
229};
230
231struct snd_pcm_hw_constraints {
232 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
233 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
234 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
235 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
236 unsigned int rules_num;
237 unsigned int rules_all;
238 struct snd_pcm_hw_rule *rules;
239};
240
241static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
242 snd_pcm_hw_param_t var)
243{
244 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
245}
246
247static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
248 snd_pcm_hw_param_t var)
249{
250 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
251}
252
253struct snd_ratnum {
254 unsigned int num;
255 unsigned int den_min, den_max, den_step;
256};
257
258struct snd_ratden {
259 unsigned int num_min, num_max, num_step;
260 unsigned int den;
261};
262
263struct snd_pcm_hw_constraint_ratnums {
264 int nrats;
265 const struct snd_ratnum *rats;
266};
267
268struct snd_pcm_hw_constraint_ratdens {
269 int nrats;
270 const struct snd_ratden *rats;
271};
272
273struct snd_pcm_hw_constraint_list {
274 const unsigned int *list;
275 unsigned int count;
276 unsigned int mask;
277};
278
279struct snd_pcm_hw_constraint_ranges {
280 unsigned int count;
281 const struct snd_interval *ranges;
282 unsigned int mask;
283};
284
285
286
287
288
289struct snd_pcm_audio_tstamp_config {
290
291 u32 type_requested:4;
292 u32 report_delay:1;
293};
294
295static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data,
296 struct snd_pcm_audio_tstamp_config *config)
297{
298 config->type_requested = data & 0xF;
299 config->report_delay = (data >> 4) & 1;
300}
301
302
303
304
305
306struct snd_pcm_audio_tstamp_report {
307
308
309
310 u32 valid:1;
311
312
313 u32 actual_type:4;
314
315
316 u32 accuracy_report:1;
317 u32 accuracy;
318};
319
320static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy,
321 const struct snd_pcm_audio_tstamp_report *report)
322{
323 u32 tmp;
324
325 tmp = report->accuracy_report;
326 tmp <<= 4;
327 tmp |= report->actual_type;
328 tmp <<= 1;
329 tmp |= report->valid;
330
331 *data &= 0xffff;
332 *data |= (tmp << 16);
333 *accuracy = report->accuracy;
334}
335
336
337struct snd_pcm_runtime {
338
339 struct snd_pcm_substream *trigger_master;
340 struct timespec trigger_tstamp;
341 bool trigger_tstamp_latched;
342 int overrange;
343 snd_pcm_uframes_t avail_max;
344 snd_pcm_uframes_t hw_ptr_base;
345 snd_pcm_uframes_t hw_ptr_interrupt;
346 unsigned long hw_ptr_jiffies;
347 unsigned long hw_ptr_buffer_jiffies;
348 snd_pcm_sframes_t delay;
349 u64 hw_ptr_wrap;
350
351
352 snd_pcm_access_t access;
353 snd_pcm_format_t format;
354 snd_pcm_subformat_t subformat;
355 unsigned int rate;
356 unsigned int channels;
357 snd_pcm_uframes_t period_size;
358 unsigned int periods;
359 snd_pcm_uframes_t buffer_size;
360 snd_pcm_uframes_t min_align;
361 size_t byte_align;
362 unsigned int frame_bits;
363 unsigned int sample_bits;
364 unsigned int info;
365 unsigned int rate_num;
366 unsigned int rate_den;
367 unsigned int no_period_wakeup: 1;
368
369
370 int tstamp_mode;
371 unsigned int period_step;
372 snd_pcm_uframes_t start_threshold;
373 snd_pcm_uframes_t stop_threshold;
374 snd_pcm_uframes_t silence_threshold;
375
376 snd_pcm_uframes_t silence_size;
377 snd_pcm_uframes_t boundary;
378
379 snd_pcm_uframes_t silence_start;
380 snd_pcm_uframes_t silence_filled;
381
382 union snd_pcm_sync_id sync;
383
384
385 struct snd_pcm_mmap_status *status;
386 struct snd_pcm_mmap_control *control;
387
388
389 snd_pcm_uframes_t twake;
390 wait_queue_head_t sleep;
391 wait_queue_head_t tsleep;
392 struct fasync_struct *fasync;
393
394
395 void *private_data;
396 void (*private_free)(struct snd_pcm_runtime *runtime);
397
398
399 struct snd_pcm_hardware hw;
400 struct snd_pcm_hw_constraints hw_constraints;
401
402
403 unsigned int timer_resolution;
404 int tstamp_type;
405
406
407 unsigned char *dma_area;
408 dma_addr_t dma_addr;
409 size_t dma_bytes;
410
411 struct snd_dma_buffer *dma_buffer_p;
412
413
414 struct snd_pcm_audio_tstamp_config audio_tstamp_config;
415 struct snd_pcm_audio_tstamp_report audio_tstamp_report;
416 struct timespec driver_tstamp;
417
418#if IS_ENABLED(CONFIG_SND_PCM_OSS)
419
420 struct snd_pcm_oss_runtime oss;
421#endif
422};
423
424struct snd_pcm_group {
425 spinlock_t lock;
426 struct mutex mutex;
427 struct list_head substreams;
428 refcount_t refs;
429};
430
431struct pid;
432
433struct snd_pcm_substream {
434 struct snd_pcm *pcm;
435 struct snd_pcm_str *pstr;
436 void *private_data;
437 int number;
438 char name[32];
439 int stream;
440 struct pm_qos_request latency_pm_qos_req;
441 size_t buffer_bytes_max;
442 struct snd_dma_buffer dma_buffer;
443 size_t dma_max;
444
445 const struct snd_pcm_ops *ops;
446
447 struct snd_pcm_runtime *runtime;
448
449 struct snd_timer *timer;
450 unsigned timer_running: 1;
451 long wait_time;
452
453 struct snd_pcm_substream *next;
454
455 struct list_head link_list;
456 struct snd_pcm_group self_group;
457 struct snd_pcm_group *group;
458
459 int ref_count;
460 atomic_t mmap_count;
461 unsigned int f_flags;
462 void (*pcm_release)(struct snd_pcm_substream *);
463 struct pid *pid;
464#if IS_ENABLED(CONFIG_SND_PCM_OSS)
465
466 struct snd_pcm_oss_substream oss;
467#endif
468#ifdef CONFIG_SND_VERBOSE_PROCFS
469 struct snd_info_entry *proc_root;
470#endif
471
472 unsigned int hw_opened: 1;
473};
474
475#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
476
477
478struct snd_pcm_str {
479 int stream;
480 struct snd_pcm *pcm;
481
482 unsigned int substream_count;
483 unsigned int substream_opened;
484 struct snd_pcm_substream *substream;
485#if IS_ENABLED(CONFIG_SND_PCM_OSS)
486
487 struct snd_pcm_oss_stream oss;
488#endif
489#ifdef CONFIG_SND_VERBOSE_PROCFS
490 struct snd_info_entry *proc_root;
491#ifdef CONFIG_SND_PCM_XRUN_DEBUG
492 unsigned int xrun_debug;
493#endif
494#endif
495 struct snd_kcontrol *chmap_kctl;
496 struct device dev;
497};
498
499struct snd_pcm {
500 struct snd_card *card;
501 struct list_head list;
502 int device;
503 unsigned int info_flags;
504 unsigned short dev_class;
505 unsigned short dev_subclass;
506 char id[64];
507 char name[80];
508 struct snd_pcm_str streams[2];
509 struct mutex open_mutex;
510 wait_queue_head_t open_wait;
511 void *private_data;
512 void (*private_free) (struct snd_pcm *pcm);
513 bool internal;
514 bool nonatomic;
515 bool no_device_suspend;
516#if IS_ENABLED(CONFIG_SND_PCM_OSS)
517 struct snd_pcm_oss oss;
518#endif
519};
520
521
522
523
524
525extern const struct file_operations snd_pcm_f_ops[2];
526
527int snd_pcm_new(struct snd_card *card, const char *id, int device,
528 int playback_count, int capture_count,
529 struct snd_pcm **rpcm);
530int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
531 int playback_count, int capture_count,
532 struct snd_pcm **rpcm);
533int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
534
535#if IS_ENABLED(CONFIG_SND_PCM_OSS)
536struct snd_pcm_notify {
537 int (*n_register) (struct snd_pcm * pcm);
538 int (*n_disconnect) (struct snd_pcm * pcm);
539 int (*n_unregister) (struct snd_pcm * pcm);
540 struct list_head list;
541};
542int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
543#endif
544
545
546
547
548
549int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
550int snd_pcm_info_user(struct snd_pcm_substream *substream,
551 struct snd_pcm_info __user *info);
552int snd_pcm_status(struct snd_pcm_substream *substream,
553 struct snd_pcm_status *status);
554int snd_pcm_start(struct snd_pcm_substream *substream);
555int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status);
556int snd_pcm_drain_done(struct snd_pcm_substream *substream);
557int snd_pcm_stop_xrun(struct snd_pcm_substream *substream);
558#ifdef CONFIG_PM
559int snd_pcm_suspend_all(struct snd_pcm *pcm);
560#else
561static inline int snd_pcm_suspend_all(struct snd_pcm *pcm)
562{
563 return 0;
564}
565#endif
566int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
567int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
568 struct snd_pcm_substream **rsubstream);
569void snd_pcm_release_substream(struct snd_pcm_substream *substream);
570int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
571 struct snd_pcm_substream **rsubstream);
572void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
573int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
574
575
576#ifdef CONFIG_SND_DEBUG
577void snd_pcm_debug_name(struct snd_pcm_substream *substream,
578 char *name, size_t len);
579#else
580static inline void
581snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size)
582{
583 *buf = 0;
584}
585#endif
586
587
588
589
590
591
592
593
594
595
596
597static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
598{
599 return substream->group != &substream->self_group;
600}
601
602void snd_pcm_stream_lock(struct snd_pcm_substream *substream);
603void snd_pcm_stream_unlock(struct snd_pcm_substream *substream);
604void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream);
605void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream);
606unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream);
607
608
609
610
611
612
613
614
615
616
617#define snd_pcm_stream_lock_irqsave(substream, flags) \
618 do { \
619 typecheck(unsigned long, flags); \
620 flags = _snd_pcm_stream_lock_irqsave(substream); \
621 } while (0)
622void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
623 unsigned long flags);
624
625
626
627
628
629
630
631
632
633
634#define snd_pcm_group_for_each_entry(s, substream) \
635 list_for_each_entry(s, &substream->group->substreams, link_list)
636
637
638
639
640
641
642
643
644static inline int snd_pcm_running(struct snd_pcm_substream *substream)
645{
646 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
647 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
648 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
649}
650
651
652
653
654
655
656static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
657{
658 return size * 8 / runtime->sample_bits;
659}
660
661
662
663
664
665
666static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
667{
668 return size * 8 / runtime->frame_bits;
669}
670
671
672
673
674
675
676static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
677{
678 return size * runtime->sample_bits / 8;
679}
680
681
682
683
684
685
686static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
687{
688 return size * runtime->frame_bits / 8;
689}
690
691
692
693
694
695
696static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
697{
698 return bytes % runtime->byte_align == 0;
699}
700
701
702
703
704
705static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
706{
707 struct snd_pcm_runtime *runtime = substream->runtime;
708 return frames_to_bytes(runtime, runtime->buffer_size);
709}
710
711
712
713
714
715static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
716{
717 struct snd_pcm_runtime *runtime = substream->runtime;
718 return frames_to_bytes(runtime, runtime->period_size);
719}
720
721
722
723
724
725
726
727static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
728{
729 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
730 if (avail < 0)
731 avail += runtime->boundary;
732 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
733 avail -= runtime->boundary;
734 return avail;
735}
736
737
738
739
740
741
742
743static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
744{
745 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
746 if (avail < 0)
747 avail += runtime->boundary;
748 return avail;
749}
750
751
752
753
754
755static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
756{
757 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
758}
759
760
761
762
763
764static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
765{
766 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
767}
768
769
770
771
772
773
774
775
776
777static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
778{
779 struct snd_pcm_runtime *runtime = substream->runtime;
780 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
781}
782
783
784
785
786
787
788
789
790
791static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
792{
793 struct snd_pcm_runtime *runtime = substream->runtime;
794 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
795}
796
797
798
799
800
801
802
803
804
805
806static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
807{
808 struct snd_pcm_runtime *runtime = substream->runtime;
809
810 if (runtime->stop_threshold >= runtime->boundary)
811 return 1;
812 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
813}
814
815
816
817
818
819
820
821
822
823static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
824{
825 struct snd_pcm_runtime *runtime = substream->runtime;
826 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
827}
828
829
830
831
832
833
834
835
836
837static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
838{
839 struct snd_pcm_runtime *runtime = substream->runtime;
840 return snd_pcm_capture_avail(runtime) == 0;
841}
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
858 struct snd_pcm_substream *master)
859{
860 substream->runtime->trigger_master = master;
861}
862
863static inline int hw_is_mask(int var)
864{
865 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
866 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
867}
868
869static inline int hw_is_interval(int var)
870{
871 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
872 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
873}
874
875static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
876 snd_pcm_hw_param_t var)
877{
878 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
879}
880
881static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
882 snd_pcm_hw_param_t var)
883{
884 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
885}
886
887static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
888 snd_pcm_hw_param_t var)
889{
890 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
891}
892
893static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
894 snd_pcm_hw_param_t var)
895{
896 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
897}
898
899
900
901
902
903static inline unsigned int params_channels(const struct snd_pcm_hw_params *p)
904{
905 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min;
906}
907
908
909
910
911
912static inline unsigned int params_rate(const struct snd_pcm_hw_params *p)
913{
914 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min;
915}
916
917
918
919
920
921static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p)
922{
923 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min;
924}
925
926
927
928
929
930static inline unsigned int params_periods(const struct snd_pcm_hw_params *p)
931{
932 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min;
933}
934
935
936
937
938
939static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p)
940{
941 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min;
942}
943
944
945
946
947
948static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p)
949{
950 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min;
951}
952
953int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
954int snd_interval_list(struct snd_interval *i, unsigned int count,
955 const unsigned int *list, unsigned int mask);
956int snd_interval_ranges(struct snd_interval *i, unsigned int count,
957 const struct snd_interval *list, unsigned int mask);
958int snd_interval_ratnum(struct snd_interval *i,
959 unsigned int rats_count, const struct snd_ratnum *rats,
960 unsigned int *nump, unsigned int *denp);
961
962void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
963void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
964
965int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
966
967int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
968 u_int64_t mask);
969int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
970 unsigned int min, unsigned int max);
971int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
972int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
973 unsigned int cond,
974 snd_pcm_hw_param_t var,
975 const struct snd_pcm_hw_constraint_list *l);
976int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime,
977 unsigned int cond,
978 snd_pcm_hw_param_t var,
979 const struct snd_pcm_hw_constraint_ranges *r);
980int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
981 unsigned int cond,
982 snd_pcm_hw_param_t var,
983 const struct snd_pcm_hw_constraint_ratnums *r);
984int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
985 unsigned int cond,
986 snd_pcm_hw_param_t var,
987 const struct snd_pcm_hw_constraint_ratdens *r);
988int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
989 unsigned int cond,
990 unsigned int width,
991 unsigned int msbits);
992int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
993 unsigned int cond,
994 snd_pcm_hw_param_t var,
995 unsigned long step);
996int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
997 unsigned int cond,
998 snd_pcm_hw_param_t var);
999int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime,
1000 unsigned int base_rate);
1001int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
1002 unsigned int cond,
1003 int var,
1004 snd_pcm_hw_rule_func_t func, void *private,
1005 int dep, ...);
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016static inline int snd_pcm_hw_constraint_single(
1017 struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1018 unsigned int val)
1019{
1020 return snd_pcm_hw_constraint_minmax(runtime, var, val, val);
1021}
1022
1023int snd_pcm_format_signed(snd_pcm_format_t format);
1024int snd_pcm_format_unsigned(snd_pcm_format_t format);
1025int snd_pcm_format_linear(snd_pcm_format_t format);
1026int snd_pcm_format_little_endian(snd_pcm_format_t format);
1027int snd_pcm_format_big_endian(snd_pcm_format_t format);
1028#if 0
1029
1030
1031
1032
1033
1034
1035
1036int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1037#endif
1038#ifdef SNDRV_LITTLE_ENDIAN
1039#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
1040#else
1041#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
1042#endif
1043int snd_pcm_format_width(snd_pcm_format_t format);
1044int snd_pcm_format_physical_width(snd_pcm_format_t format);
1045ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1046const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
1047int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
1048
1049void snd_pcm_set_ops(struct snd_pcm * pcm, int direction,
1050 const struct snd_pcm_ops *ops);
1051void snd_pcm_set_sync(struct snd_pcm_substream *substream);
1052int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
1053 unsigned int cmd, void *arg);
1054void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
1055snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream,
1056 void *buf, bool interleaved,
1057 snd_pcm_uframes_t frames, bool in_kernel);
1058
1059static inline snd_pcm_sframes_t
1060snd_pcm_lib_write(struct snd_pcm_substream *substream,
1061 const void __user *buf, snd_pcm_uframes_t frames)
1062{
1063 return __snd_pcm_lib_xfer(substream, (void __force *)buf, true, frames, false);
1064}
1065
1066static inline snd_pcm_sframes_t
1067snd_pcm_lib_read(struct snd_pcm_substream *substream,
1068 void __user *buf, snd_pcm_uframes_t frames)
1069{
1070 return __snd_pcm_lib_xfer(substream, (void __force *)buf, true, frames, false);
1071}
1072
1073static inline snd_pcm_sframes_t
1074snd_pcm_lib_writev(struct snd_pcm_substream *substream,
1075 void __user **bufs, snd_pcm_uframes_t frames)
1076{
1077 return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames, false);
1078}
1079
1080static inline snd_pcm_sframes_t
1081snd_pcm_lib_readv(struct snd_pcm_substream *substream,
1082 void __user **bufs, snd_pcm_uframes_t frames)
1083{
1084 return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames, false);
1085}
1086
1087static inline snd_pcm_sframes_t
1088snd_pcm_kernel_write(struct snd_pcm_substream *substream,
1089 const void *buf, snd_pcm_uframes_t frames)
1090{
1091 return __snd_pcm_lib_xfer(substream, (void *)buf, true, frames, true);
1092}
1093
1094static inline snd_pcm_sframes_t
1095snd_pcm_kernel_read(struct snd_pcm_substream *substream,
1096 void *buf, snd_pcm_uframes_t frames)
1097{
1098 return __snd_pcm_lib_xfer(substream, buf, true, frames, true);
1099}
1100
1101static inline snd_pcm_sframes_t
1102snd_pcm_kernel_writev(struct snd_pcm_substream *substream,
1103 void **bufs, snd_pcm_uframes_t frames)
1104{
1105 return __snd_pcm_lib_xfer(substream, bufs, false, frames, true);
1106}
1107
1108static inline snd_pcm_sframes_t
1109snd_pcm_kernel_readv(struct snd_pcm_substream *substream,
1110 void **bufs, snd_pcm_uframes_t frames)
1111{
1112 return __snd_pcm_lib_xfer(substream, bufs, false, frames, true);
1113}
1114
1115int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
1116unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
1117unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit);
1118unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a,
1119 unsigned int rates_b);
1120unsigned int snd_pcm_rate_range_to_bits(unsigned int rate_min,
1121 unsigned int rate_max);
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
1132 struct snd_dma_buffer *bufp)
1133{
1134 struct snd_pcm_runtime *runtime = substream->runtime;
1135 if (bufp) {
1136 runtime->dma_buffer_p = bufp;
1137 runtime->dma_area = bufp->area;
1138 runtime->dma_addr = bufp->addr;
1139 runtime->dma_bytes = bufp->bytes;
1140 } else {
1141 runtime->dma_buffer_p = NULL;
1142 runtime->dma_area = NULL;
1143 runtime->dma_addr = 0;
1144 runtime->dma_bytes = 0;
1145 }
1146}
1147
1148
1149
1150
1151
1152
1153static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
1154 struct timespec *tv)
1155{
1156 switch (runtime->tstamp_type) {
1157 case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC:
1158 ktime_get_ts(tv);
1159 break;
1160 case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW:
1161 getrawmonotonic(tv);
1162 break;
1163 default:
1164 getnstimeofday(tv);
1165 break;
1166 }
1167}
1168
1169
1170
1171
1172
1173void snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
1174void snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
1175void snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
1176 int type, struct device *data,
1177 size_t size, size_t max);
1178void snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
1179 int type, void *data,
1180 size_t size, size_t max);
1181int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
1182int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
1183
1184int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
1185 size_t size, gfp_t gfp_flags);
1186int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
1187struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
1188 unsigned long offset);
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201static inline int snd_pcm_lib_alloc_vmalloc_buffer
1202 (struct snd_pcm_substream *substream, size_t size)
1203{
1204 return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size,
1205 GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
1206}
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219static inline int snd_pcm_lib_alloc_vmalloc_32_buffer
1220 (struct snd_pcm_substream *substream, size_t size)
1221{
1222 return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size,
1223 GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
1224}
1225
1226#define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p)
1227
1228#ifdef CONFIG_SND_DMA_SGBUF
1229
1230
1231
1232#define snd_pcm_substream_sgbuf(substream) \
1233 snd_pcm_get_dma_buf(substream)->private_data
1234
1235struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
1236 unsigned long offset);
1237#else
1238
1239
1240
1241#define snd_pcm_sgbuf_ops_page NULL
1242#endif
1243
1244
1245
1246
1247
1248
1249static inline dma_addr_t
1250snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
1251{
1252 return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs);
1253}
1254
1255
1256
1257
1258
1259
1260static inline void *
1261snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
1262{
1263 return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs);
1264}
1265
1266
1267
1268
1269
1270
1271
1272
1273static inline unsigned int
1274snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
1275 unsigned int ofs, unsigned int size)
1276{
1277 return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size);
1278}
1279
1280
1281
1282
1283
1284
1285
1286static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1287{
1288 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1289 atomic_inc(&substream->mmap_count);
1290}
1291
1292
1293
1294
1295
1296
1297
1298static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1299{
1300 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1301 atomic_dec(&substream->mmap_count);
1302}
1303
1304int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
1305 struct vm_area_struct *area);
1306
1307#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1308#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
1309int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1310#else
1311#define SNDRV_PCM_INFO_MMAP_IOMEM 0
1312#define snd_pcm_lib_mmap_iomem NULL
1313#endif
1314
1315
1316
1317
1318
1319
1320static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1321{
1322 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1323}
1324
1325
1326
1327
1328
1329#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1330 (IEC958_AES1_CON_ORIGINAL<<8)|\
1331 (IEC958_AES1_CON_PCM_CODER<<8)|\
1332 (IEC958_AES3_CON_FS_48000<<24))
1333
1334#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1335
1336const char *snd_pcm_format_name(snd_pcm_format_t format);
1337
1338
1339
1340
1341
1342
1343
1344static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream)
1345{
1346 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1347 return "Playback";
1348 else
1349 return "Capture";
1350}
1351
1352
1353
1354
1355
1356struct snd_pcm_chmap_elem {
1357 unsigned char channels;
1358 unsigned char map[15];
1359};
1360
1361
1362struct snd_pcm_chmap {
1363 struct snd_pcm *pcm;
1364 int stream;
1365 struct snd_kcontrol *kctl;
1366 const struct snd_pcm_chmap_elem *chmap;
1367 unsigned int max_channels;
1368 unsigned int channel_mask;
1369 void *private_data;
1370};
1371
1372
1373
1374
1375
1376
1377static inline struct snd_pcm_substream *
1378snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx)
1379{
1380 struct snd_pcm_substream *s;
1381 for (s = info->pcm->streams[info->stream].substream; s; s = s->next)
1382 if (s->number == idx)
1383 return s;
1384 return NULL;
1385}
1386
1387
1388extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[];
1389
1390extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[];
1391
1392
1393#define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4))
1394#define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6))
1395#define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8))
1396
1397int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream,
1398 const struct snd_pcm_chmap_elem *chmap,
1399 int max_channels,
1400 unsigned long private_value,
1401 struct snd_pcm_chmap **info_ret);
1402
1403
1404
1405
1406
1407static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format)
1408{
1409 return 1ULL << (__force int) pcm_format;
1410}
1411
1412
1413#define pcm_err(pcm, fmt, args...) \
1414 dev_err((pcm)->card->dev, fmt, ##args)
1415#define pcm_warn(pcm, fmt, args...) \
1416 dev_warn((pcm)->card->dev, fmt, ##args)
1417#define pcm_dbg(pcm, fmt, args...) \
1418 dev_dbg((pcm)->card->dev, fmt, ##args)
1419
1420#endif
1421