1#ifndef __SOUND_PCM_H
2#define __SOUND_PCM_H
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26#include <sound/asound.h>
27#include <sound/memalloc.h>
28#include <sound/minors.h>
29#include <linux/poll.h>
30#include <linux/mm.h>
31#include <linux/bitops.h>
32#include <linux/pm_qos.h>
33
34#define snd_pcm_substream_chip(substream) ((substream)->private_data)
35#define snd_pcm_chip(pcm) ((pcm)->private_data)
36
37#if IS_ENABLED(CONFIG_SND_PCM_OSS)
38#include <sound/pcm_oss.h>
39#endif
40
41
42
43
44
45struct snd_pcm_hardware {
46 unsigned int info;
47 u64 formats;
48 unsigned int rates;
49 unsigned int rate_min;
50 unsigned int rate_max;
51 unsigned int channels_min;
52 unsigned int channels_max;
53 size_t buffer_bytes_max;
54 size_t period_bytes_min;
55 size_t period_bytes_max;
56 unsigned int periods_min;
57 unsigned int periods_max;
58 size_t fifo_size;
59};
60
61struct snd_pcm_substream;
62
63struct snd_pcm_audio_tstamp_config;
64struct snd_pcm_audio_tstamp_report;
65
66struct snd_pcm_ops {
67 int (*open)(struct snd_pcm_substream *substream);
68 int (*close)(struct snd_pcm_substream *substream);
69 int (*ioctl)(struct snd_pcm_substream * substream,
70 unsigned int cmd, void *arg);
71 int (*hw_params)(struct snd_pcm_substream *substream,
72 struct snd_pcm_hw_params *params);
73 int (*hw_free)(struct snd_pcm_substream *substream);
74 int (*prepare)(struct snd_pcm_substream *substream);
75 int (*trigger)(struct snd_pcm_substream *substream, int cmd);
76 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
77 int (*get_time_info)(struct snd_pcm_substream *substream,
78 struct timespec *system_ts, struct timespec *audio_ts,
79 struct snd_pcm_audio_tstamp_config *audio_tstamp_config,
80 struct snd_pcm_audio_tstamp_report *audio_tstamp_report);
81 int (*fill_silence)(struct snd_pcm_substream *substream, int channel,
82 unsigned long pos, unsigned long bytes);
83 int (*copy_user)(struct snd_pcm_substream *substream, int channel,
84 unsigned long pos, void __user *buf,
85 unsigned long bytes);
86 int (*copy_kernel)(struct snd_pcm_substream *substream, int channel,
87 unsigned long pos, void *buf, unsigned long bytes);
88 struct page *(*page)(struct snd_pcm_substream *substream,
89 unsigned long offset);
90 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
91 int (*ack)(struct snd_pcm_substream *substream);
92};
93
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96
97
98#if defined(CONFIG_SND_DYNAMIC_MINORS)
99#define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2)
100#else
101#define SNDRV_PCM_DEVICES 8
102#endif
103
104#define SNDRV_PCM_IOCTL1_RESET 0
105
106#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
107
108#define SNDRV_PCM_IOCTL1_FIFO_SIZE 4
109
110#define SNDRV_PCM_TRIGGER_STOP 0
111#define SNDRV_PCM_TRIGGER_START 1
112#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
113#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
114#define SNDRV_PCM_TRIGGER_SUSPEND 5
115#define SNDRV_PCM_TRIGGER_RESUME 6
116#define SNDRV_PCM_TRIGGER_DRAIN 7
117
118#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
119
120
121#define SNDRV_PCM_RATE_5512 (1<<0)
122#define SNDRV_PCM_RATE_8000 (1<<1)
123#define SNDRV_PCM_RATE_11025 (1<<2)
124#define SNDRV_PCM_RATE_16000 (1<<3)
125#define SNDRV_PCM_RATE_22050 (1<<4)
126#define SNDRV_PCM_RATE_32000 (1<<5)
127#define SNDRV_PCM_RATE_44100 (1<<6)
128#define SNDRV_PCM_RATE_48000 (1<<7)
129#define SNDRV_PCM_RATE_64000 (1<<8)
130#define SNDRV_PCM_RATE_88200 (1<<9)
131#define SNDRV_PCM_RATE_96000 (1<<10)
132#define SNDRV_PCM_RATE_176400 (1<<11)
133#define SNDRV_PCM_RATE_192000 (1<<12)
134
135#define SNDRV_PCM_RATE_CONTINUOUS (1<<30)
136#define SNDRV_PCM_RATE_KNOT (1<<31)
137
138#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
139 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
140 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
141#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
142#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
143 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
144#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
145 SNDRV_PCM_RATE_192000)
146#define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt)
147#define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8)
148#define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8)
149#define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE)
150#define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE)
151#define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE)
152#define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE)
153#define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE)
154#define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE)
155#define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE)
156#define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE)
157#define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE)
158#define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE)
159#define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE)
160#define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE)
161#define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE)
162#define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE)
163#define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE)
164#define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE)
165#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE)
166#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE)
167#define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW)
168#define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW)
169#define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM)
170#define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG)
171#define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM)
172#define SNDRV_PCM_FMTBIT_S20_LE _SNDRV_PCM_FMTBIT(S20_LE)
173#define SNDRV_PCM_FMTBIT_U20_LE _SNDRV_PCM_FMTBIT(U20_LE)
174#define SNDRV_PCM_FMTBIT_S20_BE _SNDRV_PCM_FMTBIT(S20_BE)
175#define SNDRV_PCM_FMTBIT_U20_BE _SNDRV_PCM_FMTBIT(U20_BE)
176#define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL)
177#define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE)
178#define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE)
179#define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE)
180#define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE)
181#define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE)
182#define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE)
183#define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE)
184#define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE)
185#define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE)
186#define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE)
187#define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE)
188#define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE)
189#define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24)
190#define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B)
191#define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40)
192#define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B)
193#define SNDRV_PCM_FMTBIT_DSD_U8 _SNDRV_PCM_FMTBIT(DSD_U8)
194#define SNDRV_PCM_FMTBIT_DSD_U16_LE _SNDRV_PCM_FMTBIT(DSD_U16_LE)
195#define SNDRV_PCM_FMTBIT_DSD_U32_LE _SNDRV_PCM_FMTBIT(DSD_U32_LE)
196#define SNDRV_PCM_FMTBIT_DSD_U16_BE _SNDRV_PCM_FMTBIT(DSD_U16_BE)
197#define SNDRV_PCM_FMTBIT_DSD_U32_BE _SNDRV_PCM_FMTBIT(DSD_U32_BE)
198
199#ifdef SNDRV_LITTLE_ENDIAN
200#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
201#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
202#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
203#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
204#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
205#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
206#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
207#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
208#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
209#define SNDRV_PCM_FMTBIT_S20 SNDRV_PCM_FMTBIT_S20_LE
210#define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_LE
211#endif
212#ifdef SNDRV_BIG_ENDIAN
213#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
214#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
215#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
216#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
217#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
218#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
219#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
220#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
221#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
222#define SNDRV_PCM_FMTBIT_S20 SNDRV_PCM_FMTBIT_S20_BE
223#define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_BE
224#endif
225
226struct snd_pcm_file {
227 struct snd_pcm_substream *substream;
228 int no_compat_mmap;
229 unsigned int user_pversion;
230};
231
232struct snd_pcm_hw_rule;
233typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
234 struct snd_pcm_hw_rule *rule);
235
236struct snd_pcm_hw_rule {
237 unsigned int cond;
238 int var;
239 int deps[4];
240
241 snd_pcm_hw_rule_func_t func;
242 void *private;
243};
244
245struct snd_pcm_hw_constraints {
246 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
247 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
248 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
249 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
250 unsigned int rules_num;
251 unsigned int rules_all;
252 struct snd_pcm_hw_rule *rules;
253};
254
255static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
256 snd_pcm_hw_param_t var)
257{
258 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
259}
260
261static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
262 snd_pcm_hw_param_t var)
263{
264 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
265}
266
267struct snd_ratnum {
268 unsigned int num;
269 unsigned int den_min, den_max, den_step;
270};
271
272struct snd_ratden {
273 unsigned int num_min, num_max, num_step;
274 unsigned int den;
275};
276
277struct snd_pcm_hw_constraint_ratnums {
278 int nrats;
279 const struct snd_ratnum *rats;
280};
281
282struct snd_pcm_hw_constraint_ratdens {
283 int nrats;
284 const struct snd_ratden *rats;
285};
286
287struct snd_pcm_hw_constraint_list {
288 const unsigned int *list;
289 unsigned int count;
290 unsigned int mask;
291};
292
293struct snd_pcm_hw_constraint_ranges {
294 unsigned int count;
295 const struct snd_interval *ranges;
296 unsigned int mask;
297};
298
299
300
301
302
303struct snd_pcm_audio_tstamp_config {
304
305 u32 type_requested:4;
306 u32 report_delay:1;
307};
308
309static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data,
310 struct snd_pcm_audio_tstamp_config *config)
311{
312 config->type_requested = data & 0xF;
313 config->report_delay = (data >> 4) & 1;
314}
315
316
317
318
319
320struct snd_pcm_audio_tstamp_report {
321
322
323
324 u32 valid:1;
325
326
327 u32 actual_type:4;
328
329
330 u32 accuracy_report:1;
331 u32 accuracy;
332};
333
334static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy,
335 const struct snd_pcm_audio_tstamp_report *report)
336{
337 u32 tmp;
338
339 tmp = report->accuracy_report;
340 tmp <<= 4;
341 tmp |= report->actual_type;
342 tmp <<= 1;
343 tmp |= report->valid;
344
345 *data &= 0xffff;
346 *data |= (tmp << 16);
347 *accuracy = report->accuracy;
348}
349
350
351struct snd_pcm_runtime {
352
353 struct snd_pcm_substream *trigger_master;
354 struct timespec trigger_tstamp;
355 bool trigger_tstamp_latched;
356 int overrange;
357 snd_pcm_uframes_t avail_max;
358 snd_pcm_uframes_t hw_ptr_base;
359 snd_pcm_uframes_t hw_ptr_interrupt;
360 unsigned long hw_ptr_jiffies;
361 unsigned long hw_ptr_buffer_jiffies;
362 snd_pcm_sframes_t delay;
363 u64 hw_ptr_wrap;
364
365
366 snd_pcm_access_t access;
367 snd_pcm_format_t format;
368 snd_pcm_subformat_t subformat;
369 unsigned int rate;
370 unsigned int channels;
371 snd_pcm_uframes_t period_size;
372 unsigned int periods;
373 snd_pcm_uframes_t buffer_size;
374 snd_pcm_uframes_t min_align;
375 size_t byte_align;
376 unsigned int frame_bits;
377 unsigned int sample_bits;
378 unsigned int info;
379 unsigned int rate_num;
380 unsigned int rate_den;
381 unsigned int no_period_wakeup: 1;
382
383
384 int tstamp_mode;
385 unsigned int period_step;
386 snd_pcm_uframes_t start_threshold;
387 snd_pcm_uframes_t stop_threshold;
388 snd_pcm_uframes_t silence_threshold;
389
390 snd_pcm_uframes_t silence_size;
391 snd_pcm_uframes_t boundary;
392
393 snd_pcm_uframes_t silence_start;
394 snd_pcm_uframes_t silence_filled;
395
396 union snd_pcm_sync_id sync;
397
398
399 struct snd_pcm_mmap_status *status;
400 struct snd_pcm_mmap_control *control;
401
402
403 snd_pcm_uframes_t twake;
404 wait_queue_head_t sleep;
405 wait_queue_head_t tsleep;
406 struct fasync_struct *fasync;
407
408
409 void *private_data;
410 void (*private_free)(struct snd_pcm_runtime *runtime);
411
412
413 struct snd_pcm_hardware hw;
414 struct snd_pcm_hw_constraints hw_constraints;
415
416
417 unsigned int timer_resolution;
418 int tstamp_type;
419
420
421 unsigned char *dma_area;
422 dma_addr_t dma_addr;
423 size_t dma_bytes;
424
425 struct snd_dma_buffer *dma_buffer_p;
426
427
428 struct snd_pcm_audio_tstamp_config audio_tstamp_config;
429 struct snd_pcm_audio_tstamp_report audio_tstamp_report;
430 struct timespec driver_tstamp;
431
432#if IS_ENABLED(CONFIG_SND_PCM_OSS)
433
434 struct snd_pcm_oss_runtime oss;
435#endif
436};
437
438struct snd_pcm_group {
439 spinlock_t lock;
440 struct mutex mutex;
441 struct list_head substreams;
442 int count;
443};
444
445struct pid;
446
447struct snd_pcm_substream {
448 struct snd_pcm *pcm;
449 struct snd_pcm_str *pstr;
450 void *private_data;
451 int number;
452 char name[32];
453 int stream;
454 struct pm_qos_request latency_pm_qos_req;
455 size_t buffer_bytes_max;
456 struct snd_dma_buffer dma_buffer;
457 size_t dma_max;
458
459 const struct snd_pcm_ops *ops;
460
461 struct snd_pcm_runtime *runtime;
462
463 struct snd_timer *timer;
464 unsigned timer_running: 1;
465
466 struct snd_pcm_substream *next;
467
468 struct list_head link_list;
469 struct snd_pcm_group self_group;
470 struct snd_pcm_group *group;
471
472 void *file;
473 int ref_count;
474 atomic_t mmap_count;
475 unsigned int f_flags;
476 void (*pcm_release)(struct snd_pcm_substream *);
477 struct pid *pid;
478#if IS_ENABLED(CONFIG_SND_PCM_OSS)
479
480 struct snd_pcm_oss_substream oss;
481#endif
482#ifdef CONFIG_SND_VERBOSE_PROCFS
483 struct snd_info_entry *proc_root;
484 struct snd_info_entry *proc_info_entry;
485 struct snd_info_entry *proc_hw_params_entry;
486 struct snd_info_entry *proc_sw_params_entry;
487 struct snd_info_entry *proc_status_entry;
488 struct snd_info_entry *proc_prealloc_entry;
489 struct snd_info_entry *proc_prealloc_max_entry;
490#ifdef CONFIG_SND_PCM_XRUN_DEBUG
491 struct snd_info_entry *proc_xrun_injection_entry;
492#endif
493#endif
494
495 unsigned int hw_opened: 1;
496};
497
498#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
499
500
501struct snd_pcm_str {
502 int stream;
503 struct snd_pcm *pcm;
504
505 unsigned int substream_count;
506 unsigned int substream_opened;
507 struct snd_pcm_substream *substream;
508#if IS_ENABLED(CONFIG_SND_PCM_OSS)
509
510 struct snd_pcm_oss_stream oss;
511#endif
512#ifdef CONFIG_SND_VERBOSE_PROCFS
513 struct snd_info_entry *proc_root;
514 struct snd_info_entry *proc_info_entry;
515#ifdef CONFIG_SND_PCM_XRUN_DEBUG
516 unsigned int xrun_debug;
517 struct snd_info_entry *proc_xrun_debug_entry;
518#endif
519#endif
520 struct snd_kcontrol *chmap_kctl;
521 struct device dev;
522};
523
524struct snd_pcm {
525 struct snd_card *card;
526 struct list_head list;
527 int device;
528 unsigned int info_flags;
529 unsigned short dev_class;
530 unsigned short dev_subclass;
531 char id[64];
532 char name[80];
533 struct snd_pcm_str streams[2];
534 struct mutex open_mutex;
535 wait_queue_head_t open_wait;
536 void *private_data;
537 void (*private_free) (struct snd_pcm *pcm);
538 bool internal;
539 bool nonatomic;
540#if IS_ENABLED(CONFIG_SND_PCM_OSS)
541 struct snd_pcm_oss oss;
542#endif
543};
544
545
546
547
548
549extern const struct file_operations snd_pcm_f_ops[2];
550
551int snd_pcm_new(struct snd_card *card, const char *id, int device,
552 int playback_count, int capture_count,
553 struct snd_pcm **rpcm);
554int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
555 int playback_count, int capture_count,
556 struct snd_pcm **rpcm);
557int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
558
559#if IS_ENABLED(CONFIG_SND_PCM_OSS)
560struct snd_pcm_notify {
561 int (*n_register) (struct snd_pcm * pcm);
562 int (*n_disconnect) (struct snd_pcm * pcm);
563 int (*n_unregister) (struct snd_pcm * pcm);
564 struct list_head list;
565};
566int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
567#endif
568
569
570
571
572
573int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
574int snd_pcm_info_user(struct snd_pcm_substream *substream,
575 struct snd_pcm_info __user *info);
576int snd_pcm_status(struct snd_pcm_substream *substream,
577 struct snd_pcm_status *status);
578int snd_pcm_start(struct snd_pcm_substream *substream);
579int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status);
580int snd_pcm_drain_done(struct snd_pcm_substream *substream);
581int snd_pcm_stop_xrun(struct snd_pcm_substream *substream);
582#ifdef CONFIG_PM
583int snd_pcm_suspend(struct snd_pcm_substream *substream);
584int snd_pcm_suspend_all(struct snd_pcm *pcm);
585#else
586static inline int snd_pcm_suspend(struct snd_pcm_substream *substream)
587{
588 return 0;
589}
590static inline int snd_pcm_suspend_all(struct snd_pcm *pcm)
591{
592 return 0;
593}
594#endif
595int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
596int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
597 struct snd_pcm_substream **rsubstream);
598void snd_pcm_release_substream(struct snd_pcm_substream *substream);
599int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
600 struct snd_pcm_substream **rsubstream);
601void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
602int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
603
604
605#ifdef CONFIG_SND_DEBUG
606void snd_pcm_debug_name(struct snd_pcm_substream *substream,
607 char *name, size_t len);
608#else
609static inline void
610snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size)
611{
612 *buf = 0;
613}
614#endif
615
616
617
618
619
620
621
622
623
624
625
626static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
627{
628 return substream->group != &substream->self_group;
629}
630
631void snd_pcm_stream_lock(struct snd_pcm_substream *substream);
632void snd_pcm_stream_unlock(struct snd_pcm_substream *substream);
633void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream);
634void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream);
635unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream);
636
637
638
639
640
641
642
643
644
645
646#define snd_pcm_stream_lock_irqsave(substream, flags) \
647 do { \
648 typecheck(unsigned long, flags); \
649 flags = _snd_pcm_stream_lock_irqsave(substream); \
650 } while (0)
651void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
652 unsigned long flags);
653
654
655
656
657
658
659
660
661
662
663#define snd_pcm_group_for_each_entry(s, substream) \
664 list_for_each_entry(s, &substream->group->substreams, link_list)
665
666
667
668
669
670
671
672
673static inline int snd_pcm_running(struct snd_pcm_substream *substream)
674{
675 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
676 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
677 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
678}
679
680
681
682
683
684
685static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
686{
687 return size * 8 / runtime->sample_bits;
688}
689
690
691
692
693
694
695static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
696{
697 return size * 8 / runtime->frame_bits;
698}
699
700
701
702
703
704
705static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
706{
707 return size * runtime->sample_bits / 8;
708}
709
710
711
712
713
714
715static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
716{
717 return size * runtime->frame_bits / 8;
718}
719
720
721
722
723
724
725static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
726{
727 return bytes % runtime->byte_align == 0;
728}
729
730
731
732
733
734static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
735{
736 struct snd_pcm_runtime *runtime = substream->runtime;
737 return frames_to_bytes(runtime, runtime->buffer_size);
738}
739
740
741
742
743
744static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
745{
746 struct snd_pcm_runtime *runtime = substream->runtime;
747 return frames_to_bytes(runtime, runtime->period_size);
748}
749
750
751
752
753
754
755
756static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
757{
758 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
759 if (avail < 0)
760 avail += runtime->boundary;
761 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
762 avail -= runtime->boundary;
763 return avail;
764}
765
766
767
768
769
770
771
772static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
773{
774 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
775 if (avail < 0)
776 avail += runtime->boundary;
777 return avail;
778}
779
780
781
782
783
784static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
785{
786 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
787}
788
789
790
791
792
793static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
794{
795 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
796}
797
798
799
800
801
802
803
804
805
806static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
807{
808 struct snd_pcm_runtime *runtime = substream->runtime;
809 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
810}
811
812
813
814
815
816
817
818
819
820static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
821{
822 struct snd_pcm_runtime *runtime = substream->runtime;
823 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
824}
825
826
827
828
829
830
831
832
833
834
835static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
836{
837 struct snd_pcm_runtime *runtime = substream->runtime;
838
839 if (runtime->stop_threshold >= runtime->boundary)
840 return 1;
841 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
842}
843
844
845
846
847
848
849
850
851
852static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
853{
854 struct snd_pcm_runtime *runtime = substream->runtime;
855 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
856}
857
858
859
860
861
862
863
864
865
866static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
867{
868 struct snd_pcm_runtime *runtime = substream->runtime;
869 return snd_pcm_capture_avail(runtime) == 0;
870}
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
887 struct snd_pcm_substream *master)
888{
889 substream->runtime->trigger_master = master;
890}
891
892static inline int hw_is_mask(int var)
893{
894 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
895 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
896}
897
898static inline int hw_is_interval(int var)
899{
900 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
901 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
902}
903
904static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
905 snd_pcm_hw_param_t var)
906{
907 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
908}
909
910static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
911 snd_pcm_hw_param_t var)
912{
913 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
914}
915
916static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
917 snd_pcm_hw_param_t var)
918{
919 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
920}
921
922static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
923 snd_pcm_hw_param_t var)
924{
925 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
926}
927
928
929
930
931
932static inline unsigned int params_channels(const struct snd_pcm_hw_params *p)
933{
934 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min;
935}
936
937
938
939
940
941static inline unsigned int params_rate(const struct snd_pcm_hw_params *p)
942{
943 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min;
944}
945
946
947
948
949
950static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p)
951{
952 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min;
953}
954
955
956
957
958
959static inline unsigned int params_periods(const struct snd_pcm_hw_params *p)
960{
961 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min;
962}
963
964
965
966
967
968static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p)
969{
970 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min;
971}
972
973
974
975
976
977static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p)
978{
979 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min;
980}
981
982int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
983int snd_interval_list(struct snd_interval *i, unsigned int count,
984 const unsigned int *list, unsigned int mask);
985int snd_interval_ranges(struct snd_interval *i, unsigned int count,
986 const struct snd_interval *list, unsigned int mask);
987int snd_interval_ratnum(struct snd_interval *i,
988 unsigned int rats_count, const struct snd_ratnum *rats,
989 unsigned int *nump, unsigned int *denp);
990
991void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
992void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
993
994int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
995
996int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
997 u_int64_t mask);
998int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
999 unsigned int min, unsigned int max);
1000int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
1001int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
1002 unsigned int cond,
1003 snd_pcm_hw_param_t var,
1004 const struct snd_pcm_hw_constraint_list *l);
1005int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime,
1006 unsigned int cond,
1007 snd_pcm_hw_param_t var,
1008 const struct snd_pcm_hw_constraint_ranges *r);
1009int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
1010 unsigned int cond,
1011 snd_pcm_hw_param_t var,
1012 const struct snd_pcm_hw_constraint_ratnums *r);
1013int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
1014 unsigned int cond,
1015 snd_pcm_hw_param_t var,
1016 const struct snd_pcm_hw_constraint_ratdens *r);
1017int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
1018 unsigned int cond,
1019 unsigned int width,
1020 unsigned int msbits);
1021int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
1022 unsigned int cond,
1023 snd_pcm_hw_param_t var,
1024 unsigned long step);
1025int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
1026 unsigned int cond,
1027 snd_pcm_hw_param_t var);
1028int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime,
1029 unsigned int base_rate);
1030int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
1031 unsigned int cond,
1032 int var,
1033 snd_pcm_hw_rule_func_t func, void *private,
1034 int dep, ...);
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045static inline int snd_pcm_hw_constraint_single(
1046 struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1047 unsigned int val)
1048{
1049 return snd_pcm_hw_constraint_minmax(runtime, var, val, val);
1050}
1051
1052int snd_pcm_format_signed(snd_pcm_format_t format);
1053int snd_pcm_format_unsigned(snd_pcm_format_t format);
1054int snd_pcm_format_linear(snd_pcm_format_t format);
1055int snd_pcm_format_little_endian(snd_pcm_format_t format);
1056int snd_pcm_format_big_endian(snd_pcm_format_t format);
1057#if 0
1058
1059
1060
1061
1062
1063
1064
1065int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1066#endif
1067#ifdef SNDRV_LITTLE_ENDIAN
1068#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
1069#else
1070#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
1071#endif
1072int snd_pcm_format_width(snd_pcm_format_t format);
1073int snd_pcm_format_physical_width(snd_pcm_format_t format);
1074ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1075const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
1076int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
1077
1078void snd_pcm_set_ops(struct snd_pcm * pcm, int direction,
1079 const struct snd_pcm_ops *ops);
1080void snd_pcm_set_sync(struct snd_pcm_substream *substream);
1081int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
1082 unsigned int cmd, void *arg);
1083void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
1084snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream,
1085 void *buf, bool interleaved,
1086 snd_pcm_uframes_t frames, bool in_kernel);
1087
1088static inline snd_pcm_sframes_t
1089snd_pcm_lib_write(struct snd_pcm_substream *substream,
1090 const void __user *buf, snd_pcm_uframes_t frames)
1091{
1092 return __snd_pcm_lib_xfer(substream, (void *)buf, true, frames, false);
1093}
1094
1095static inline snd_pcm_sframes_t
1096snd_pcm_lib_read(struct snd_pcm_substream *substream,
1097 void __user *buf, snd_pcm_uframes_t frames)
1098{
1099 return __snd_pcm_lib_xfer(substream, (void *)buf, true, frames, false);
1100}
1101
1102static inline snd_pcm_sframes_t
1103snd_pcm_lib_writev(struct snd_pcm_substream *substream,
1104 void __user **bufs, snd_pcm_uframes_t frames)
1105{
1106 return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames, false);
1107}
1108
1109static inline snd_pcm_sframes_t
1110snd_pcm_lib_readv(struct snd_pcm_substream *substream,
1111 void __user **bufs, snd_pcm_uframes_t frames)
1112{
1113 return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames, false);
1114}
1115
1116static inline snd_pcm_sframes_t
1117snd_pcm_kernel_write(struct snd_pcm_substream *substream,
1118 const void *buf, snd_pcm_uframes_t frames)
1119{
1120 return __snd_pcm_lib_xfer(substream, (void *)buf, true, frames, true);
1121}
1122
1123static inline snd_pcm_sframes_t
1124snd_pcm_kernel_read(struct snd_pcm_substream *substream,
1125 void *buf, snd_pcm_uframes_t frames)
1126{
1127 return __snd_pcm_lib_xfer(substream, buf, true, frames, true);
1128}
1129
1130static inline snd_pcm_sframes_t
1131snd_pcm_kernel_writev(struct snd_pcm_substream *substream,
1132 void **bufs, snd_pcm_uframes_t frames)
1133{
1134 return __snd_pcm_lib_xfer(substream, bufs, false, frames, true);
1135}
1136
1137static inline snd_pcm_sframes_t
1138snd_pcm_kernel_readv(struct snd_pcm_substream *substream,
1139 void **bufs, snd_pcm_uframes_t frames)
1140{
1141 return __snd_pcm_lib_xfer(substream, bufs, false, frames, true);
1142}
1143
1144int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
1145unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
1146unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit);
1147unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a,
1148 unsigned int rates_b);
1149unsigned int snd_pcm_rate_range_to_bits(unsigned int rate_min,
1150 unsigned int rate_max);
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
1161 struct snd_dma_buffer *bufp)
1162{
1163 struct snd_pcm_runtime *runtime = substream->runtime;
1164 if (bufp) {
1165 runtime->dma_buffer_p = bufp;
1166 runtime->dma_area = bufp->area;
1167 runtime->dma_addr = bufp->addr;
1168 runtime->dma_bytes = bufp->bytes;
1169 } else {
1170 runtime->dma_buffer_p = NULL;
1171 runtime->dma_area = NULL;
1172 runtime->dma_addr = 0;
1173 runtime->dma_bytes = 0;
1174 }
1175}
1176
1177
1178
1179
1180
1181
1182static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
1183 struct timespec *tv)
1184{
1185 switch (runtime->tstamp_type) {
1186 case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC:
1187 ktime_get_ts(tv);
1188 break;
1189 case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW:
1190 getrawmonotonic(tv);
1191 break;
1192 default:
1193 getnstimeofday(tv);
1194 break;
1195 }
1196}
1197
1198
1199
1200
1201
1202int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
1203int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
1204int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
1205 int type, struct device *data,
1206 size_t size, size_t max);
1207int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
1208 int type, void *data,
1209 size_t size, size_t max);
1210int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
1211int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
1212
1213int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
1214 size_t size, gfp_t gfp_flags);
1215int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
1216struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
1217 unsigned long offset);
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230static inline int snd_pcm_lib_alloc_vmalloc_buffer
1231 (struct snd_pcm_substream *substream, size_t size)
1232{
1233 return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size,
1234 GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
1235}
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248static inline int snd_pcm_lib_alloc_vmalloc_32_buffer
1249 (struct snd_pcm_substream *substream, size_t size)
1250{
1251 return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size,
1252 GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
1253}
1254
1255#define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p)
1256
1257#ifdef CONFIG_SND_DMA_SGBUF
1258
1259
1260
1261#define snd_pcm_substream_sgbuf(substream) \
1262 snd_pcm_get_dma_buf(substream)->private_data
1263
1264struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
1265 unsigned long offset);
1266#else
1267
1268
1269
1270#define snd_pcm_sgbuf_ops_page NULL
1271#endif
1272
1273
1274
1275
1276
1277
1278static inline dma_addr_t
1279snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
1280{
1281 return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs);
1282}
1283
1284
1285
1286
1287
1288
1289static inline void *
1290snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
1291{
1292 return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs);
1293}
1294
1295
1296
1297
1298
1299
1300
1301
1302static inline unsigned int
1303snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
1304 unsigned int ofs, unsigned int size)
1305{
1306 return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size);
1307}
1308
1309
1310
1311
1312
1313
1314
1315static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1316{
1317 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1318 atomic_inc(&substream->mmap_count);
1319}
1320
1321
1322
1323
1324
1325
1326
1327static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1328{
1329 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1330 atomic_dec(&substream->mmap_count);
1331}
1332
1333int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
1334 struct vm_area_struct *area);
1335
1336#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1337#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
1338int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1339#else
1340#define SNDRV_PCM_INFO_MMAP_IOMEM 0
1341#define snd_pcm_lib_mmap_iomem NULL
1342#endif
1343
1344#define snd_pcm_lib_mmap_vmalloc NULL
1345
1346
1347
1348
1349
1350
1351static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1352{
1353 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1354}
1355
1356
1357
1358
1359
1360#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1361 (IEC958_AES1_CON_ORIGINAL<<8)|\
1362 (IEC958_AES1_CON_PCM_CODER<<8)|\
1363 (IEC958_AES3_CON_FS_48000<<24))
1364
1365#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1366
1367const char *snd_pcm_format_name(snd_pcm_format_t format);
1368
1369
1370
1371
1372
1373
1374
1375static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream)
1376{
1377 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1378 return "Playback";
1379 else
1380 return "Capture";
1381}
1382
1383
1384
1385
1386
1387struct snd_pcm_chmap_elem {
1388 unsigned char channels;
1389 unsigned char map[15];
1390};
1391
1392
1393struct snd_pcm_chmap {
1394 struct snd_pcm *pcm;
1395 int stream;
1396 struct snd_kcontrol *kctl;
1397 const struct snd_pcm_chmap_elem *chmap;
1398 unsigned int max_channels;
1399 unsigned int channel_mask;
1400 void *private_data;
1401};
1402
1403
1404
1405
1406
1407
1408static inline struct snd_pcm_substream *
1409snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx)
1410{
1411 struct snd_pcm_substream *s;
1412 for (s = info->pcm->streams[info->stream].substream; s; s = s->next)
1413 if (s->number == idx)
1414 return s;
1415 return NULL;
1416}
1417
1418
1419extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[];
1420
1421extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[];
1422
1423
1424#define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4))
1425#define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6))
1426#define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8))
1427
1428int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream,
1429 const struct snd_pcm_chmap_elem *chmap,
1430 int max_channels,
1431 unsigned long private_value,
1432 struct snd_pcm_chmap **info_ret);
1433
1434
1435
1436
1437
1438static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format)
1439{
1440 return 1ULL << (__force int) pcm_format;
1441}
1442
1443
1444#define pcm_err(pcm, fmt, args...) \
1445 dev_err((pcm)->card->dev, fmt, ##args)
1446#define pcm_warn(pcm, fmt, args...) \
1447 dev_warn((pcm)->card->dev, fmt, ##args)
1448#define pcm_dbg(pcm, fmt, args...) \
1449 dev_dbg((pcm)->card->dev, fmt, ##args)
1450
1451#endif
1452