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[ALSA] Remove xxx_t typedefs: Proc handler
[deliverable/linux.git] / include / sound / pcm.h
CommitLineData
1da177e4
LT		 1#ifndef __SOUND_PCM_H
2#define __SOUND_PCM_H
3
4/*
5 * Digital Audio (PCM) abstract layer
6 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
7 * Abramo Bagnara <abramo@alsa-project.org>
8 *
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25
26#include <sound/asound.h>
27#include <sound/memalloc.h>
28#include <linux/poll.h>
29#include <linux/bitops.h>
30
31typedef sndrv_pcm_uframes_t snd_pcm_uframes_t;
32typedef sndrv_pcm_sframes_t snd_pcm_sframes_t;
33typedef enum sndrv_pcm_class snd_pcm_class_t;
34typedef enum sndrv_pcm_subclass snd_pcm_subclass_t;
35typedef enum sndrv_pcm_stream snd_pcm_stream_t;
36typedef enum sndrv_pcm_access snd_pcm_access_t;
37typedef enum sndrv_pcm_format snd_pcm_format_t;
38typedef enum sndrv_pcm_subformat snd_pcm_subformat_t;
39typedef enum sndrv_pcm_state snd_pcm_state_t;
40typedef union sndrv_pcm_sync_id snd_pcm_sync_id_t;
41typedef struct sndrv_pcm_info snd_pcm_info_t;
42typedef enum sndrv_pcm_hw_param snd_pcm_hw_param_t;
43typedef struct sndrv_pcm_hw_params snd_pcm_hw_params_t;
44typedef enum sndrv_pcm_start snd_pcm_start_t;
45typedef enum sndrv_pcm_xrun snd_pcm_xrun_t;
46typedef enum sndrv_pcm_tstamp snd_pcm_tstamp_t;
47typedef struct sndrv_pcm_sw_params snd_pcm_sw_params_t;
48typedef struct sndrv_pcm_channel_info snd_pcm_channel_info_t;
49typedef struct sndrv_pcm_status snd_pcm_status_t;
50typedef struct sndrv_pcm_mmap_status snd_pcm_mmap_status_t;
51typedef struct sndrv_pcm_mmap_control snd_pcm_mmap_control_t;
52typedef struct sndrv_mask snd_mask_t;
53typedef struct snd_sg_buf snd_pcm_sgbuf_t;
54
55#define snd_pcm_substream_chip(substream) ((substream)->private_data)
56#define snd_pcm_chip(pcm) ((pcm)->private_data)
57
58typedef struct _snd_pcm_file snd_pcm_file_t;
59typedef struct _snd_pcm_runtime snd_pcm_runtime_t;
60
61#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
62#include "pcm_oss.h"
63#endif
64
65/*
66 * Hardware (lowlevel) section
67 */
68
69typedef struct _snd_pcm_hardware {
70 unsigned int info; /* SNDRV_PCM_INFO_* */
71 u64 formats; /* SNDRV_PCM_FMTBIT_* */
72 unsigned int rates; /* SNDRV_PCM_RATE_* */
73 unsigned int rate_min; /* min rate */
74 unsigned int rate_max; /* max rate */
75 unsigned int channels_min; /* min channels */
76 unsigned int channels_max; /* max channels */
77 size_t buffer_bytes_max; /* max buffer size */
78 size_t period_bytes_min; /* min period size */
79 size_t period_bytes_max; /* max period size */
80 unsigned int periods_min; /* min # of periods */
81 unsigned int periods_max; /* max # of periods */
82 size_t fifo_size; /* fifo size in bytes */
83} snd_pcm_hardware_t;
84
85typedef struct _snd_pcm_ops {
86 int (*open)(snd_pcm_substream_t *substream);
87 int (*close)(snd_pcm_substream_t *substream);
88 int (*ioctl)(snd_pcm_substream_t * substream,
89 unsigned int cmd, void *arg);
90 int (*hw_params)(snd_pcm_substream_t * substream, snd_pcm_hw_params_t * params);
91 int (*hw_free)(snd_pcm_substream_t *substream);
92 int (*prepare)(snd_pcm_substream_t * substream);
93 int (*trigger)(snd_pcm_substream_t * substream, int cmd);
94 snd_pcm_uframes_t (*pointer)(snd_pcm_substream_t * substream);
95 int (*copy)(snd_pcm_substream_t *substream, int channel, snd_pcm_uframes_t pos,
96 void __user *buf, snd_pcm_uframes_t count);
97 int (*silence)(snd_pcm_substream_t *substream, int channel,
98 snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
99 struct page *(*page)(snd_pcm_substream_t *substream, unsigned long offset);
100 int (*mmap)(snd_pcm_substream_t *substream, struct vm_area_struct *vma);
101 int (*ack)(snd_pcm_substream_t *substream);
102} snd_pcm_ops_t;
103
104/*
105 *
106 */
107
108#define SNDRV_PCM_DEVICES 8
109
110#define SNDRV_PCM_IOCTL1_FALSE ((void *)0)
111#define SNDRV_PCM_IOCTL1_TRUE ((void *)1)
112
113#define SNDRV_PCM_IOCTL1_RESET 0
114#define SNDRV_PCM_IOCTL1_INFO 1
115#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
116#define SNDRV_PCM_IOCTL1_GSTATE 3
117
118#define SNDRV_PCM_TRIGGER_STOP 0
119#define SNDRV_PCM_TRIGGER_START 1
120#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
121#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
122#define SNDRV_PCM_TRIGGER_SUSPEND 5
123#define SNDRV_PCM_TRIGGER_RESUME 6
124
125#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
126
127/* If you change this don't forget to change rates[] table in pcm_native.c */
128#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
129#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
130#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
131#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
132#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
133#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
134#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
135#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
136#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
137#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
138#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
139#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
140#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
141
142#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
143#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
144
145#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
146 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
147 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
148#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
149#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
150 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
151#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
152 SNDRV_PCM_RATE_192000)
153#define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8)
154#define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8)
155#define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE)
156#define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE)
157#define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE)
158#define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE)
159#define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE)
160#define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE)
161#define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE)
162#define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE)
163#define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE)
164#define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE)
165#define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE)
166#define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE)
167#define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
168#define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
169#define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
170#define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
171#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
172#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
173#define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
174#define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW)
175#define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
176#define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG)
177#define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM)
178#define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
179#define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
180#define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
181#define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
182#define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
183#define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
184#define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
185#define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
186#define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
187#define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
188#define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
189#define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
190#define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
191
192#ifdef SNDRV_LITTLE_ENDIAN
193#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
194#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
195#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
196#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
197#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
198#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
199#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
200#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
201#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
202#endif
203#ifdef SNDRV_BIG_ENDIAN
204#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
205#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
206#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
207#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
208#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
209#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
210#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
211#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
212#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
213#endif
214
215struct _snd_pcm_file {
216 snd_pcm_substream_t * substream;
217 struct _snd_pcm_file * next;
218};
219
220typedef struct _snd_pcm_hw_rule snd_pcm_hw_rule_t;
221
222typedef int (*snd_pcm_hw_rule_func_t)(snd_pcm_hw_params_t *params,
223 snd_pcm_hw_rule_t *rule);
224
225struct _snd_pcm_hw_rule {
226 unsigned int cond;
227 snd_pcm_hw_rule_func_t func;
228 int var;
229 int deps[4];
230 void *private;
231};
232
233typedef struct _snd_pcm_hw_constraints {
234 snd_mask_t masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
235 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
236 snd_interval_t intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
237 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
238 unsigned int rules_num;
239 unsigned int rules_all;
240 snd_pcm_hw_rule_t *rules;
241} snd_pcm_hw_constraints_t;
242
243static inline snd_mask_t *constrs_mask(snd_pcm_hw_constraints_t *constrs,
244 snd_pcm_hw_param_t var)
245{
246 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
247}
248
249static inline snd_interval_t *constrs_interval(snd_pcm_hw_constraints_t *constrs,
250 snd_pcm_hw_param_t var)
251{
252 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
253}
254
255typedef struct {
256 unsigned int num;
257 unsigned int den_min, den_max, den_step;
258} ratnum_t;
259
260typedef struct {
261 unsigned int num_min, num_max, num_step;
262 unsigned int den;
263} ratden_t;
264
265typedef struct {
266 int nrats;
267 ratnum_t *rats;
268} snd_pcm_hw_constraint_ratnums_t;
269
270typedef struct {
271 int nrats;
272 ratden_t *rats;
273} snd_pcm_hw_constraint_ratdens_t;
274
275typedef struct {
276 unsigned int count;
277 unsigned int *list;
278 unsigned int mask;
279} snd_pcm_hw_constraint_list_t;
280
281struct _snd_pcm_runtime {
282 /* -- Status -- */
283 snd_pcm_substream_t *trigger_master;
07799e75 284 struct timespec trigger_tstamp; /* trigger timestamp */
1da177e4
LT		 285 int overrange;
286 snd_pcm_uframes_t avail_max;
287 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
288 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/
289
290 /* -- HW params -- */
291 snd_pcm_access_t access; /* access mode */
292 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
293 snd_pcm_subformat_t subformat; /* subformat */
294 unsigned int rate; /* rate in Hz */
295 unsigned int channels; /* channels */
296 snd_pcm_uframes_t period_size; /* period size */
297 unsigned int periods; /* periods */
298 snd_pcm_uframes_t buffer_size; /* buffer size */
299 unsigned int tick_time; /* tick time */
300 snd_pcm_uframes_t min_align; /* Min alignment for the format */
301 size_t byte_align;
302 unsigned int frame_bits;
303 unsigned int sample_bits;
304 unsigned int info;
305 unsigned int rate_num;
306 unsigned int rate_den;
307
308 /* -- SW params -- */
1da177e4
LT		 309 snd_pcm_tstamp_t tstamp_mode; /* mmap timestamp is updated */
310 unsigned int period_step;
311 unsigned int sleep_min; /* min ticks to sleep */
312 snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */
313 snd_pcm_uframes_t start_threshold;
314 snd_pcm_uframes_t stop_threshold;
315 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
316 noise is nearest than this */
317 snd_pcm_uframes_t silence_size; /* Silence filling size */
318 snd_pcm_uframes_t boundary; /* pointers wrap point */
319
320 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
321 snd_pcm_uframes_t silence_filled; /* size filled with silence */
322
323 snd_pcm_sync_id_t sync; /* hardware synchronization ID */
324
325 /* -- mmap -- */
326 volatile snd_pcm_mmap_status_t *status;
327 volatile snd_pcm_mmap_control_t *control;
328 atomic_t mmap_count;
329
330 /* -- locking / scheduling -- */
331 wait_queue_head_t sleep;
332 struct timer_list tick_timer;
333 struct fasync_struct *fasync;
334
335 /* -- private section -- */
336 void *private_data;
337 void (*private_free)(snd_pcm_runtime_t *runtime);
338
339 /* -- hardware description -- */
340 snd_pcm_hardware_t hw;
341 snd_pcm_hw_constraints_t hw_constraints;
342
343 /* -- interrupt callbacks -- */
344 void (*transfer_ack_begin)(snd_pcm_substream_t *substream);
345 void (*transfer_ack_end)(snd_pcm_substream_t *substream);
346
347 /* -- timer -- */
348 unsigned int timer_resolution; /* timer resolution */
349
350 /* -- DMA -- */
351 unsigned char *dma_area; /* DMA area */
352 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
353 size_t dma_bytes; /* size of DMA area */
354
355 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
356
357#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
358 /* -- OSS things -- */
359 snd_pcm_oss_runtime_t oss;
360#endif
361};
362
363typedef struct _snd_pcm_group { /* keep linked substreams */
364 spinlock_t lock;
365 struct list_head substreams;
366 int count;
367} snd_pcm_group_t;
368
369struct _snd_pcm_substream {
370 snd_pcm_t *pcm;
371 snd_pcm_str_t *pstr;
372 void *private_data; /* copied from pcm->private_data */
373 int number;
374 char name[32]; /* substream name */
375 int stream; /* stream (direction) */
376 size_t buffer_bytes_max; /* limit ring buffer size */
377 struct snd_dma_buffer dma_buffer;
378 unsigned int dma_buf_id;
379 size_t dma_max;
380 /* -- hardware operations -- */
1da177e4
LT		 381 snd_pcm_ops_t *ops;
382 /* -- runtime information -- */
383 snd_pcm_runtime_t *runtime;
384 /* -- timer section -- */
385 snd_timer_t *timer; /* timer */
386 unsigned timer_running: 1; /* time is running */
387 spinlock_t timer_lock;
388 /* -- next substream -- */
389 snd_pcm_substream_t *next;
390 /* -- linked substreams -- */
391 struct list_head link_list; /* linked list member */
392 snd_pcm_group_t self_group; /* fake group for non linked substream (with substream lock inside) */
393 snd_pcm_group_t *group; /* pointer to current group */
394 /* -- assigned files -- */
395 snd_pcm_file_t *file;
396 struct file *ffile;
397#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
398 /* -- OSS things -- */
399 snd_pcm_oss_substream_t oss;
400#endif
401 snd_info_entry_t *proc_root;
402 snd_info_entry_t *proc_info_entry;
403 snd_info_entry_t *proc_hw_params_entry;
404 snd_info_entry_t *proc_sw_params_entry;
405 snd_info_entry_t *proc_status_entry;
406 snd_info_entry_t *proc_prealloc_entry;
407 /* misc flags */
408 unsigned int no_mmap_ctrl: 1;
409};
410
411#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
412#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL || ((substream)->oss.file != NULL))
413#else
414#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL)
415#endif
416
417
418struct _snd_pcm_str {
419 int stream; /* stream (direction) */
420 snd_pcm_t *pcm;
421 /* -- substreams -- */
422 unsigned int substream_count;
423 unsigned int substream_opened;
424 snd_pcm_substream_t *substream;
425#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
426 /* -- OSS things -- */
427 snd_pcm_oss_stream_t oss;
428#endif
429 snd_pcm_file_t *files;
430 snd_minor_t *reg;
431 snd_info_entry_t *proc_root;
432 snd_info_entry_t *proc_info_entry;
433#ifdef CONFIG_SND_DEBUG
434 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
435 snd_info_entry_t *proc_xrun_debug_entry;
436#endif
437};
438
439struct _snd_pcm {
440 snd_card_t *card;
441 unsigned int device; /* device number */
442 unsigned int info_flags;
443 unsigned short dev_class;
444 unsigned short dev_subclass;
445 char id[64];
446 char name[80];
447 snd_pcm_str_t streams[2];
448 struct semaphore open_mutex;
449 wait_queue_head_t open_wait;
450 void *private_data;
451 void (*private_free) (snd_pcm_t *pcm);
452#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
453 snd_pcm_oss_t oss;
454#endif
455};
456
457typedef struct _snd_pcm_notify {
458 int (*n_register) (snd_pcm_t * pcm);
459 int (*n_disconnect) (snd_pcm_t * pcm);
460 int (*n_unregister) (snd_pcm_t * pcm);
461 struct list_head list;
462} snd_pcm_notify_t;
463
464/*
465 * Registering
466 */
467
468extern snd_pcm_t *snd_pcm_devices[];
469extern snd_minor_t snd_pcm_reg[2];
470
471int snd_pcm_new(snd_card_t * card, char *id, int device,
472 int playback_count, int capture_count,
473 snd_pcm_t **rpcm);
474int snd_pcm_new_stream(snd_pcm_t *pcm, int stream, int substream_count);
475
476int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree);
477
478/*
479 * Native I/O
480 */
481
482extern rwlock_t snd_pcm_link_rwlock;
483
484int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info);
485int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user *info);
486int snd_pcm_status(snd_pcm_substream_t * substream, snd_pcm_status_t *status);
487int snd_pcm_prepare(snd_pcm_substream_t *substream);
488int snd_pcm_start(snd_pcm_substream_t *substream);
489int snd_pcm_stop(snd_pcm_substream_t *substream, int status);
490int snd_pcm_drain_done(snd_pcm_substream_t *substream);
491#ifdef CONFIG_PM
492int snd_pcm_suspend(snd_pcm_substream_t *substream);
493int snd_pcm_suspend_all(snd_pcm_t *pcm);
494#endif
495int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
496int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
497int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
498int snd_pcm_open_substream(snd_pcm_t *pcm, int stream, snd_pcm_substream_t **rsubstream);
499void snd_pcm_release_substream(snd_pcm_substream_t *substream);
500void snd_pcm_vma_notify_data(void *client, void *data);
501int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file, struct vm_area_struct *area);
502
503#if BITS_PER_LONG >= 64
504
505static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
506{
507 *rem = *n % div;
508 *n /= div;
509}
510
511#elif defined(i386)
512
513static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
514{
515 u_int32_t low, high;
516 low = *n & 0xffffffff;
517 high = *n >> 32;
518 if (high) {
519 u_int32_t high1 = high % div;
520 high /= div;
521 asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
522 *n = (u_int64_t)high << 32 | low;
523 } else {
524 *n = low / div;
525 *rem = low % div;
526 }
527}
528#else
529
530static inline void divl(u_int32_t high, u_int32_t low,
531 u_int32_t div,
532 u_int32_t *q, u_int32_t *r)
533{
534 u_int64_t n = (u_int64_t)high << 32 | low;
535 u_int64_t d = (u_int64_t)div << 31;
536 u_int32_t q1 = 0;
537 int c = 32;
538 while (n > 0xffffffffU) {
539 q1 <<= 1;
540 if (n >= d) {
541 n -= d;
542 q1 |= 1;
543 }
544 d >>= 1;
545 c--;
546 }
547 q1 <<= c;
548 if (n) {
549 low = n;
550 *q = q1 | (low / div);
551 *r = low % div;
552 } else {
553 *r = 0;
554 *q = q1;
555 }
556 return;
557}
558
559static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
560{
561 u_int32_t low, high;
562 low = *n & 0xffffffff;
563 high = *n >> 32;
564 if (high) {
565 u_int32_t high1 = high % div;
566 u_int32_t low1 = low;
567 high /= div;
568 divl(high1, low1, div, &low, rem);
569 *n = (u_int64_t)high << 32 | low;
570 } else {
571 *n = low / div;
572 *rem = low % div;
573 }
574}
575#endif
576
577/*
578 * PCM library
579 */
580
581static inline int snd_pcm_stream_linked(snd_pcm_substream_t *substream)
582{
583 return substream->group != &substream->self_group;
584}
585
586static inline void snd_pcm_stream_lock(snd_pcm_substream_t *substream)
587{
588 read_lock(&snd_pcm_link_rwlock);
589 spin_lock(&substream->self_group.lock);
590}
591
592static inline void snd_pcm_stream_unlock(snd_pcm_substream_t *substream)
593{
594 spin_unlock(&substream->self_group.lock);
595 read_unlock(&snd_pcm_link_rwlock);
596}
597
598static inline void snd_pcm_stream_lock_irq(snd_pcm_substream_t *substream)
599{
600 read_lock_irq(&snd_pcm_link_rwlock);
601 spin_lock(&substream->self_group.lock);
602}
603
604static inline void snd_pcm_stream_unlock_irq(snd_pcm_substream_t *substream)
605{
606 spin_unlock(&substream->self_group.lock);
607 read_unlock_irq(&snd_pcm_link_rwlock);
608}
609
610#define snd_pcm_stream_lock_irqsave(substream, flags) \
611do { \
612 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
613 spin_lock(&substream->self_group.lock); \
614} while (0)
615
616#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
617do { \
618 spin_unlock(&substream->self_group.lock); \
619 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
620} while (0)
621
622#define snd_pcm_group_for_each(pos, substream) \
623 list_for_each(pos, &substream->group->substreams)
624
625#define snd_pcm_group_substream_entry(pos) \
626 list_entry(pos, snd_pcm_substream_t, link_list)
627
628static inline int snd_pcm_running(snd_pcm_substream_t *substream)
629{
630 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
631 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
632 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
633}
634
635static inline ssize_t bytes_to_samples(snd_pcm_runtime_t *runtime, ssize_t size)
636{
637 return size * 8 / runtime->sample_bits;
638}
639
640static inline snd_pcm_sframes_t bytes_to_frames(snd_pcm_runtime_t *runtime, ssize_t size)
641{
642 return size * 8 / runtime->frame_bits;
643}
644
645static inline ssize_t samples_to_bytes(snd_pcm_runtime_t *runtime, ssize_t size)
646{
647 return size * runtime->sample_bits / 8;
648}
649
650static inline ssize_t frames_to_bytes(snd_pcm_runtime_t *runtime, snd_pcm_sframes_t size)
651{
652 return size * runtime->frame_bits / 8;
653}
654
655static inline int frame_aligned(snd_pcm_runtime_t *runtime, ssize_t bytes)
656{
657 return bytes % runtime->byte_align == 0;
658}
659
660static inline size_t snd_pcm_lib_buffer_bytes(snd_pcm_substream_t *substream)
661{
662 snd_pcm_runtime_t *runtime = substream->runtime;
663 return frames_to_bytes(runtime, runtime->buffer_size);
664}
665
666static inline size_t snd_pcm_lib_period_bytes(snd_pcm_substream_t *substream)
667{
668 snd_pcm_runtime_t *runtime = substream->runtime;
669 return frames_to_bytes(runtime, runtime->period_size);
670}
671
672/*
673 * result is: 0 ... (boundary - 1)
674 */
675static inline snd_pcm_uframes_t snd_pcm_playback_avail(snd_pcm_runtime_t *runtime)
676{
677 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
678 if (avail < 0)
679 avail += runtime->boundary;
680 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
681 avail -= runtime->boundary;
682 return avail;
683}
684
685/*
686 * result is: 0 ... (boundary - 1)
687 */
688static inline snd_pcm_uframes_t snd_pcm_capture_avail(snd_pcm_runtime_t *runtime)
689{
690 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
691 if (avail < 0)
692 avail += runtime->boundary;
693 return avail;
694}
695
696static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(snd_pcm_runtime_t *runtime)
697{
698 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
699}
700
701static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(snd_pcm_runtime_t *runtime)
702{
703 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
704}
705
706/**
707 * snd_pcm_playback_ready - check whether the playback buffer is available
708 * @substream: the pcm substream instance
709 *
710 * Checks whether enough free space is available on the playback buffer.
711 *
712 * Returns non-zero if available, or zero if not.
713 */
714static inline int snd_pcm_playback_ready(snd_pcm_substream_t *substream)
715{
716 snd_pcm_runtime_t *runtime = substream->runtime;
717 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
718}
719
720/**
721 * snd_pcm_capture_ready - check whether the capture buffer is available
722 * @substream: the pcm substream instance
723 *
724 * Checks whether enough capture data is available on the capture buffer.
725 *
726 * Returns non-zero if available, or zero if not.
727 */
728static inline int snd_pcm_capture_ready(snd_pcm_substream_t *substream)
729{
730 snd_pcm_runtime_t *runtime = substream->runtime;
731 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
732}
733
734/**
735 * snd_pcm_playback_data - check whether any data exists on the playback buffer
736 * @substream: the pcm substream instance
737 *
738 * Checks whether any data exists on the playback buffer. If stop_threshold
739 * is bigger or equal to boundary, then this function returns always non-zero.
740 *
741 * Returns non-zero if exists, or zero if not.
742 */
743static inline int snd_pcm_playback_data(snd_pcm_substream_t *substream)
744{
745 snd_pcm_runtime_t *runtime = substream->runtime;
746
747 if (runtime->stop_threshold >= runtime->boundary)
748 return 1;
749 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
750}
751
752/**
753 * snd_pcm_playback_empty - check whether the playback buffer is empty
754 * @substream: the pcm substream instance
755 *
756 * Checks whether the playback buffer is empty.
757 *
758 * Returns non-zero if empty, or zero if not.
759 */
760static inline int snd_pcm_playback_empty(snd_pcm_substream_t *substream)
761{
762 snd_pcm_runtime_t *runtime = substream->runtime;
763 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
764}
765
766/**
767 * snd_pcm_capture_empty - check whether the capture buffer is empty
768 * @substream: the pcm substream instance
769 *
770 * Checks whether the capture buffer is empty.
771 *
772 * Returns non-zero if empty, or zero if not.
773 */
774static inline int snd_pcm_capture_empty(snd_pcm_substream_t *substream)
775{
776 snd_pcm_runtime_t *runtime = substream->runtime;
777 return snd_pcm_capture_avail(runtime) == 0;
778}
779
780static inline void snd_pcm_trigger_done(snd_pcm_substream_t *substream,
781 snd_pcm_substream_t *master)
782{
783 substream->runtime->trigger_master = master;
784}
785
786static inline int hw_is_mask(int var)
787{
788 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
789 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
790}
791
792static inline int hw_is_interval(int var)
793{
794 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
795 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
796}
797
798static inline snd_mask_t *hw_param_mask(snd_pcm_hw_params_t *params,
799 snd_pcm_hw_param_t var)
800{
801 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
802}
803
804static inline snd_interval_t *hw_param_interval(snd_pcm_hw_params_t *params,
805 snd_pcm_hw_param_t var)
806{
807 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
808}
809
810static inline const snd_mask_t *hw_param_mask_c(const snd_pcm_hw_params_t *params,
811 snd_pcm_hw_param_t var)
812{
813 return (const snd_mask_t *)hw_param_mask((snd_pcm_hw_params_t*) params, var);
814}
815
816static inline const snd_interval_t *hw_param_interval_c(const snd_pcm_hw_params_t *params,
817 snd_pcm_hw_param_t var)
818{
819 return (const snd_interval_t *)hw_param_interval((snd_pcm_hw_params_t*) params, var);
820}
821
822#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
823#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
824#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
825#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
826#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
827#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
828#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
829#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
830#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
831#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
832#define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min
833
834
835int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v);
836void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
837void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
838void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b,
839 unsigned int k, snd_interval_t *c);
840void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k,
841 const snd_interval_t *b, snd_interval_t *c);
842int snd_interval_list(snd_interval_t *i, unsigned int count, unsigned int *list, unsigned int mask);
843int snd_interval_ratnum(snd_interval_t *i,
844 unsigned int rats_count, ratnum_t *rats,
845 unsigned int *nump, unsigned int *denp);
846
847void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params);
848void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, snd_pcm_hw_param_t var);
1da177e4
LT		 849int snd_pcm_hw_param_near(snd_pcm_substream_t *substream,
850 snd_pcm_hw_params_t *params,
851 snd_pcm_hw_param_t var,
852 unsigned int val, int *dir);
853int snd_pcm_hw_param_set(snd_pcm_substream_t *pcm,
854 snd_pcm_hw_params_t *params,
855 snd_pcm_hw_param_t var,
856 unsigned int val, int dir);
857int snd_pcm_hw_params_choose(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
858
859int snd_pcm_hw_refine(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
1da177e4
LT		 860
861int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream);
862int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream);
863
864int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
865 u_int32_t mask);
866int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
867 u_int64_t mask);
868int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
869 unsigned int min, unsigned int max);
870int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var);
871int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime,
872 unsigned int cond,
873 snd_pcm_hw_param_t var,
874 snd_pcm_hw_constraint_list_t *l);
875int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime,
876 unsigned int cond,
877 snd_pcm_hw_param_t var,
878 snd_pcm_hw_constraint_ratnums_t *r);
879int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime,
880 unsigned int cond,
881 snd_pcm_hw_param_t var,
882 snd_pcm_hw_constraint_ratdens_t *r);
883int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime,
884 unsigned int cond,
885 unsigned int width,
886 unsigned int msbits);
887int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime,
888 unsigned int cond,
889 snd_pcm_hw_param_t var,
890 unsigned long step);
891int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime,
892 unsigned int cond,
893 snd_pcm_hw_param_t var);
894int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime,
895 unsigned int cond,
896 int var,
897 snd_pcm_hw_rule_func_t func, void *private,
898 int dep, ...);
899
900int snd_pcm_format_signed(snd_pcm_format_t format);
901int snd_pcm_format_unsigned(snd_pcm_format_t format);
902int snd_pcm_format_linear(snd_pcm_format_t format);
903int snd_pcm_format_little_endian(snd_pcm_format_t format);
904int snd_pcm_format_big_endian(snd_pcm_format_t format);
1b44c28d
TI		 905#if 0 /* just for DocBook */
906/**
9502dcad
TI		 907 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
908 * @format: the format to check
909 *
910 * Returns 1 if the given PCM format is CPU-endian, 0 if
911 * opposite, or a negative error code if endian not specified.
912 */
8cdfd251 913int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1b44c28d 914#endif /* DocBook */
9502dcad 915#ifdef SNDRV_LITTLE_ENDIAN
9d01a82e 916#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
9502dcad 917#else
9d01a82e 918#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
9502dcad 919#endif
1da177e4
LT		 920int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
921int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
9502dcad 922ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1da177e4
LT		 923const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
924int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
925snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
926const char *snd_pcm_format_name(snd_pcm_format_t format);
927
928void snd_pcm_set_ops(snd_pcm_t * pcm, int direction, snd_pcm_ops_t *ops);
929void snd_pcm_set_sync(snd_pcm_substream_t * substream);
930int snd_pcm_lib_interleave_len(snd_pcm_substream_t *substream);
931int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream,
932 unsigned int cmd, void *arg);
933int snd_pcm_update_hw_ptr(snd_pcm_substream_t *substream);
934int snd_pcm_playback_xrun_check(snd_pcm_substream_t *substream);
935int snd_pcm_capture_xrun_check(snd_pcm_substream_t *substream);
936int snd_pcm_playback_xrun_asap(snd_pcm_substream_t *substream);
937int snd_pcm_capture_xrun_asap(snd_pcm_substream_t *substream);
938void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t new_hw_ptr);
939void snd_pcm_tick_prepare(snd_pcm_substream_t *substream);
940void snd_pcm_tick_set(snd_pcm_substream_t *substream, unsigned long ticks);
941void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream);
942void snd_pcm_period_elapsed(snd_pcm_substream_t *substream);
943snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream,
944 const void __user *buf,
945 snd_pcm_uframes_t frames);
946snd_pcm_sframes_t snd_pcm_lib_read(snd_pcm_substream_t *substream,
947 void __user *buf, snd_pcm_uframes_t frames);
948snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream,
949 void __user **bufs, snd_pcm_uframes_t frames);
950snd_pcm_sframes_t snd_pcm_lib_readv(snd_pcm_substream_t *substream,
951 void __user **bufs, snd_pcm_uframes_t frames);
952
953int snd_pcm_limit_hw_rates(snd_pcm_runtime_t *runtime);
954
955static inline void snd_pcm_set_runtime_buffer(snd_pcm_substream_t *substream,
956 struct snd_dma_buffer *bufp)
957{
958 snd_pcm_runtime_t *runtime = substream->runtime;
959 if (bufp) {
960 runtime->dma_buffer_p = bufp;
961 runtime->dma_area = bufp->area;
962 runtime->dma_addr = bufp->addr;
963 runtime->dma_bytes = bufp->bytes;
964 } else {
965 runtime->dma_buffer_p = NULL;
966 runtime->dma_area = NULL;
967 runtime->dma_addr = 0;
968 runtime->dma_bytes = 0;
969 }
970}
971
972/*
973 * Timer interface
974 */
975
976void snd_pcm_timer_resolution_change(snd_pcm_substream_t *substream);
977void snd_pcm_timer_init(snd_pcm_substream_t * substream);
978void snd_pcm_timer_done(snd_pcm_substream_t * substream);
979
980/*
981 * Memory
982 */
983
984int snd_pcm_lib_preallocate_free(snd_pcm_substream_t *substream);
985int snd_pcm_lib_preallocate_free_for_all(snd_pcm_t *pcm);
986int snd_pcm_lib_preallocate_pages(snd_pcm_substream_t *substream,
987 int type, struct device *data,
988 size_t size, size_t max);
989int snd_pcm_lib_preallocate_pages_for_all(snd_pcm_t *pcm,
990 int type, void *data,
991 size_t size, size_t max);
992int snd_pcm_lib_malloc_pages(snd_pcm_substream_t *substream, size_t size);
993int snd_pcm_lib_free_pages(snd_pcm_substream_t *substream);
994
995#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data)
996#define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size)
997#define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
998struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset);
999
1000/* handle mmap counter - PCM mmap callback should handle this counter properly */
1001static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1002{
1003 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
1004 atomic_inc(&substream->runtime->mmap_count);
1005}
1006
1007static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1008{
1009 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
1010 atomic_dec(&substream->runtime->mmap_count);
1011}
1012
1013/* mmap for io-memory area */
1014#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1015#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
1016int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area);
1017#else
1018#define SNDRV_PCM_INFO_MMAP_IOMEM 0
1019#define snd_pcm_lib_mmap_iomem NULL
1020#endif
1021
1022static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1023{
1024 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1025}
1026
1027/*
1028 * Misc
1029 */
1030
1031#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1032 (IEC958_AES1_CON_ORIGINAL<<8)|\
1033 (IEC958_AES1_CON_PCM_CODER<<8)|\
1034 (IEC958_AES3_CON_FS_48000<<24))
1035
1036#endif /* __SOUND_PCM_H */
Linux kernel - Deliverables
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