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1da177e4
LT		 1#ifndef __SOUND_PCM_H
2#define __SOUND_PCM_H
3
4/*
5 * Digital Audio (PCM) abstract layer
6 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
7 * Abramo Bagnara <abramo@alsa-project.org>
8 *
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25
26#include <sound/asound.h>
27#include <sound/memalloc.h>
28#include <linux/poll.h>
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;
284 snd_timestamp_t trigger_tstamp; /* trigger timestamp */
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 -- */
309 int tstamp_timespec; /* use timeval (0) or timespec (1) */
310 snd_pcm_tstamp_t tstamp_mode; /* mmap timestamp is updated */
311 unsigned int period_step;
312 unsigned int sleep_min; /* min ticks to sleep */
313 snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */
314 snd_pcm_uframes_t start_threshold;
315 snd_pcm_uframes_t stop_threshold;
316 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
317 noise is nearest than this */
318 snd_pcm_uframes_t silence_size; /* Silence filling size */
319 snd_pcm_uframes_t boundary; /* pointers wrap point */
320
321 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
322 snd_pcm_uframes_t silence_filled; /* size filled with silence */
323
324 snd_pcm_sync_id_t sync; /* hardware synchronization ID */
325
326 /* -- mmap -- */
327 volatile snd_pcm_mmap_status_t *status;
328 volatile snd_pcm_mmap_control_t *control;
329 atomic_t mmap_count;
330
331 /* -- locking / scheduling -- */
332 wait_queue_head_t sleep;
333 struct timer_list tick_timer;
334 struct fasync_struct *fasync;
335
336 /* -- private section -- */
337 void *private_data;
338 void (*private_free)(snd_pcm_runtime_t *runtime);
339
340 /* -- hardware description -- */
341 snd_pcm_hardware_t hw;
342 snd_pcm_hw_constraints_t hw_constraints;
343
344 /* -- interrupt callbacks -- */
345 void (*transfer_ack_begin)(snd_pcm_substream_t *substream);
346 void (*transfer_ack_end)(snd_pcm_substream_t *substream);
347
348 /* -- timer -- */
349 unsigned int timer_resolution; /* timer resolution */
350
351 /* -- DMA -- */
352 unsigned char *dma_area; /* DMA area */
353 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
354 size_t dma_bytes; /* size of DMA area */
355
356 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
357
358#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
359 /* -- OSS things -- */
360 snd_pcm_oss_runtime_t oss;
361#endif
362};
363
364typedef struct _snd_pcm_group { /* keep linked substreams */
365 spinlock_t lock;
366 struct list_head substreams;
367 int count;
368} snd_pcm_group_t;
369
370struct _snd_pcm_substream {
371 snd_pcm_t *pcm;
372 snd_pcm_str_t *pstr;
373 void *private_data; /* copied from pcm->private_data */
374 int number;
375 char name[32]; /* substream name */
376 int stream; /* stream (direction) */
377 size_t buffer_bytes_max; /* limit ring buffer size */
378 struct snd_dma_buffer dma_buffer;
379 unsigned int dma_buf_id;
380 size_t dma_max;
381 /* -- hardware operations -- */
1da177e4
LT		 382 snd_pcm_ops_t *ops;
383 /* -- runtime information -- */
384 snd_pcm_runtime_t *runtime;
385 /* -- timer section -- */
386 snd_timer_t *timer; /* timer */
387 unsigned timer_running: 1; /* time is running */
388 spinlock_t timer_lock;
389 /* -- next substream -- */
390 snd_pcm_substream_t *next;
391 /* -- linked substreams -- */
392 struct list_head link_list; /* linked list member */
393 snd_pcm_group_t self_group; /* fake group for non linked substream (with substream lock inside) */
394 snd_pcm_group_t *group; /* pointer to current group */
395 /* -- assigned files -- */
396 snd_pcm_file_t *file;
397 struct file *ffile;
398#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
399 /* -- OSS things -- */
400 snd_pcm_oss_substream_t oss;
401#endif
402 snd_info_entry_t *proc_root;
403 snd_info_entry_t *proc_info_entry;
404 snd_info_entry_t *proc_hw_params_entry;
405 snd_info_entry_t *proc_sw_params_entry;
406 snd_info_entry_t *proc_status_entry;
407 snd_info_entry_t *proc_prealloc_entry;
408 /* misc flags */
409 unsigned int no_mmap_ctrl: 1;
410};
411
412#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
413#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL || ((substream)->oss.file != NULL))
414#else
415#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL)
416#endif
417
418
419struct _snd_pcm_str {
420 int stream; /* stream (direction) */
421 snd_pcm_t *pcm;
422 /* -- substreams -- */
423 unsigned int substream_count;
424 unsigned int substream_opened;
425 snd_pcm_substream_t *substream;
426#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
427 /* -- OSS things -- */
428 snd_pcm_oss_stream_t oss;
429#endif
430 snd_pcm_file_t *files;
431 snd_minor_t *reg;
432 snd_info_entry_t *proc_root;
433 snd_info_entry_t *proc_info_entry;
434#ifdef CONFIG_SND_DEBUG
435 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
436 snd_info_entry_t *proc_xrun_debug_entry;
437#endif
438};
439
440struct _snd_pcm {
441 snd_card_t *card;
442 unsigned int device; /* device number */
443 unsigned int info_flags;
444 unsigned short dev_class;
445 unsigned short dev_subclass;
446 char id[64];
447 char name[80];
448 snd_pcm_str_t streams[2];
449 struct semaphore open_mutex;
450 wait_queue_head_t open_wait;
451 void *private_data;
452 void (*private_free) (snd_pcm_t *pcm);
453#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
454 snd_pcm_oss_t oss;
455#endif
456};
457
458typedef struct _snd_pcm_notify {
459 int (*n_register) (snd_pcm_t * pcm);
460 int (*n_disconnect) (snd_pcm_t * pcm);
461 int (*n_unregister) (snd_pcm_t * pcm);
462 struct list_head list;
463} snd_pcm_notify_t;
464
465/*
466 * Registering
467 */
468
469extern snd_pcm_t *snd_pcm_devices[];
470extern snd_minor_t snd_pcm_reg[2];
471
472int snd_pcm_new(snd_card_t * card, char *id, int device,
473 int playback_count, int capture_count,
474 snd_pcm_t **rpcm);
475int snd_pcm_new_stream(snd_pcm_t *pcm, int stream, int substream_count);
476
477int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree);
478
479/*
480 * Native I/O
481 */
482
483extern rwlock_t snd_pcm_link_rwlock;
484
485int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info);
486int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user *info);
487int snd_pcm_status(snd_pcm_substream_t * substream, snd_pcm_status_t *status);
488int snd_pcm_prepare(snd_pcm_substream_t *substream);
489int snd_pcm_start(snd_pcm_substream_t *substream);
490int snd_pcm_stop(snd_pcm_substream_t *substream, int status);
491int snd_pcm_drain_done(snd_pcm_substream_t *substream);
492#ifdef CONFIG_PM
493int snd_pcm_suspend(snd_pcm_substream_t *substream);
494int snd_pcm_suspend_all(snd_pcm_t *pcm);
495#endif
496int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
497int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
498int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
499int snd_pcm_open_substream(snd_pcm_t *pcm, int stream, snd_pcm_substream_t **rsubstream);
500void snd_pcm_release_substream(snd_pcm_substream_t *substream);
501void snd_pcm_vma_notify_data(void *client, void *data);
502int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file, struct vm_area_struct *area);
503
504#if BITS_PER_LONG >= 64
505
506static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
507{
508 *rem = *n % div;
509 *n /= div;
510}
511
512#elif defined(i386)
513
514static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
515{
516 u_int32_t low, high;
517 low = *n & 0xffffffff;
518 high = *n >> 32;
519 if (high) {
520 u_int32_t high1 = high % div;
521 high /= div;
522 asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
523 *n = (u_int64_t)high << 32 | low;
524 } else {
525 *n = low / div;
526 *rem = low % div;
527 }
528}
529#else
530
531static inline void divl(u_int32_t high, u_int32_t low,
532 u_int32_t div,
533 u_int32_t *q, u_int32_t *r)
534{
535 u_int64_t n = (u_int64_t)high << 32 | low;
536 u_int64_t d = (u_int64_t)div << 31;
537 u_int32_t q1 = 0;
538 int c = 32;
539 while (n > 0xffffffffU) {
540 q1 <<= 1;
541 if (n >= d) {
542 n -= d;
543 q1 |= 1;
544 }
545 d >>= 1;
546 c--;
547 }
548 q1 <<= c;
549 if (n) {
550 low = n;
551 *q = q1 | (low / div);
552 *r = low % div;
553 } else {
554 *r = 0;
555 *q = q1;
556 }
557 return;
558}
559
560static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
561{
562 u_int32_t low, high;
563 low = *n & 0xffffffff;
564 high = *n >> 32;
565 if (high) {
566 u_int32_t high1 = high % div;
567 u_int32_t low1 = low;
568 high /= div;
569 divl(high1, low1, div, &low, rem);
570 *n = (u_int64_t)high << 32 | low;
571 } else {
572 *n = low / div;
573 *rem = low % div;
574 }
575}
576#endif
577
578/*
579 * PCM library
580 */
581
582static inline int snd_pcm_stream_linked(snd_pcm_substream_t *substream)
583{
584 return substream->group != &substream->self_group;
585}
586
587static inline void snd_pcm_stream_lock(snd_pcm_substream_t *substream)
588{
589 read_lock(&snd_pcm_link_rwlock);
590 spin_lock(&substream->self_group.lock);
591}
592
593static inline void snd_pcm_stream_unlock(snd_pcm_substream_t *substream)
594{
595 spin_unlock(&substream->self_group.lock);
596 read_unlock(&snd_pcm_link_rwlock);
597}
598
599static inline void snd_pcm_stream_lock_irq(snd_pcm_substream_t *substream)
600{
601 read_lock_irq(&snd_pcm_link_rwlock);
602 spin_lock(&substream->self_group.lock);
603}
604
605static inline void snd_pcm_stream_unlock_irq(snd_pcm_substream_t *substream)
606{
607 spin_unlock(&substream->self_group.lock);
608 read_unlock_irq(&snd_pcm_link_rwlock);
609}
610
611#define snd_pcm_stream_lock_irqsave(substream, flags) \
612do { \
613 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
614 spin_lock(&substream->self_group.lock); \
615} while (0)
616
617#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
618do { \
619 spin_unlock(&substream->self_group.lock); \
620 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
621} while (0)
622
623#define snd_pcm_group_for_each(pos, substream) \
624 list_for_each(pos, &substream->group->substreams)
625
626#define snd_pcm_group_substream_entry(pos) \
627 list_entry(pos, snd_pcm_substream_t, link_list)
628
629static inline int snd_pcm_running(snd_pcm_substream_t *substream)
630{
631 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
632 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
633 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
634}
635
636static inline ssize_t bytes_to_samples(snd_pcm_runtime_t *runtime, ssize_t size)
637{
638 return size * 8 / runtime->sample_bits;
639}
640
641static inline snd_pcm_sframes_t bytes_to_frames(snd_pcm_runtime_t *runtime, ssize_t size)
642{
643 return size * 8 / runtime->frame_bits;
644}
645
646static inline ssize_t samples_to_bytes(snd_pcm_runtime_t *runtime, ssize_t size)
647{
648 return size * runtime->sample_bits / 8;
649}
650
651static inline ssize_t frames_to_bytes(snd_pcm_runtime_t *runtime, snd_pcm_sframes_t size)
652{
653 return size * runtime->frame_bits / 8;
654}
655
656static inline int frame_aligned(snd_pcm_runtime_t *runtime, ssize_t bytes)
657{
658 return bytes % runtime->byte_align == 0;
659}
660
661static inline size_t snd_pcm_lib_buffer_bytes(snd_pcm_substream_t *substream)
662{
663 snd_pcm_runtime_t *runtime = substream->runtime;
664 return frames_to_bytes(runtime, runtime->buffer_size);
665}
666
667static inline size_t snd_pcm_lib_period_bytes(snd_pcm_substream_t *substream)
668{
669 snd_pcm_runtime_t *runtime = substream->runtime;
670 return frames_to_bytes(runtime, runtime->period_size);
671}
672
673/*
674 * result is: 0 ... (boundary - 1)
675 */
676static inline snd_pcm_uframes_t snd_pcm_playback_avail(snd_pcm_runtime_t *runtime)
677{
678 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
679 if (avail < 0)
680 avail += runtime->boundary;
681 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
682 avail -= runtime->boundary;
683 return avail;
684}
685
686/*
687 * result is: 0 ... (boundary - 1)
688 */
689static inline snd_pcm_uframes_t snd_pcm_capture_avail(snd_pcm_runtime_t *runtime)
690{
691 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
692 if (avail < 0)
693 avail += runtime->boundary;
694 return avail;
695}
696
697static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(snd_pcm_runtime_t *runtime)
698{
699 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
700}
701
702static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(snd_pcm_runtime_t *runtime)
703{
704 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
705}
706
707/**
708 * snd_pcm_playback_ready - check whether the playback buffer is available
709 * @substream: the pcm substream instance
710 *
711 * Checks whether enough free space is available on the playback buffer.
712 *
713 * Returns non-zero if available, or zero if not.
714 */
715static inline int snd_pcm_playback_ready(snd_pcm_substream_t *substream)
716{
717 snd_pcm_runtime_t *runtime = substream->runtime;
718 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
719}
720
721/**
722 * snd_pcm_capture_ready - check whether the capture buffer is available
723 * @substream: the pcm substream instance
724 *
725 * Checks whether enough capture data is available on the capture buffer.
726 *
727 * Returns non-zero if available, or zero if not.
728 */
729static inline int snd_pcm_capture_ready(snd_pcm_substream_t *substream)
730{
731 snd_pcm_runtime_t *runtime = substream->runtime;
732 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
733}
734
735/**
736 * snd_pcm_playback_data - check whether any data exists on the playback buffer
737 * @substream: the pcm substream instance
738 *
739 * Checks whether any data exists on the playback buffer. If stop_threshold
740 * is bigger or equal to boundary, then this function returns always non-zero.
741 *
742 * Returns non-zero if exists, or zero if not.
743 */
744static inline int snd_pcm_playback_data(snd_pcm_substream_t *substream)
745{
746 snd_pcm_runtime_t *runtime = substream->runtime;
747
748 if (runtime->stop_threshold >= runtime->boundary)
749 return 1;
750 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
751}
752
753/**
754 * snd_pcm_playback_empty - check whether the playback buffer is empty
755 * @substream: the pcm substream instance
756 *
757 * Checks whether the playback buffer is empty.
758 *
759 * Returns non-zero if empty, or zero if not.
760 */
761static inline int snd_pcm_playback_empty(snd_pcm_substream_t *substream)
762{
763 snd_pcm_runtime_t *runtime = substream->runtime;
764 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
765}
766
767/**
768 * snd_pcm_capture_empty - check whether the capture buffer is empty
769 * @substream: the pcm substream instance
770 *
771 * Checks whether the capture buffer is empty.
772 *
773 * Returns non-zero if empty, or zero if not.
774 */
775static inline int snd_pcm_capture_empty(snd_pcm_substream_t *substream)
776{
777 snd_pcm_runtime_t *runtime = substream->runtime;
778 return snd_pcm_capture_avail(runtime) == 0;
779}
780
781static inline void snd_pcm_trigger_done(snd_pcm_substream_t *substream,
782 snd_pcm_substream_t *master)
783{
784 substream->runtime->trigger_master = master;
785}
786
787static inline int hw_is_mask(int var)
788{
789 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
790 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
791}
792
793static inline int hw_is_interval(int var)
794{
795 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
796 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
797}
798
799static inline snd_mask_t *hw_param_mask(snd_pcm_hw_params_t *params,
800 snd_pcm_hw_param_t var)
801{
802 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
803}
804
805static inline snd_interval_t *hw_param_interval(snd_pcm_hw_params_t *params,
806 snd_pcm_hw_param_t var)
807{
808 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
809}
810
811static inline const snd_mask_t *hw_param_mask_c(const snd_pcm_hw_params_t *params,
812 snd_pcm_hw_param_t var)
813{
814 return (const snd_mask_t *)hw_param_mask((snd_pcm_hw_params_t*) params, var);
815}
816
817static inline const snd_interval_t *hw_param_interval_c(const snd_pcm_hw_params_t *params,
818 snd_pcm_hw_param_t var)
819{
820 return (const snd_interval_t *)hw_param_interval((snd_pcm_hw_params_t*) params, var);
821}
822
823#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
824#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
825#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
826#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
827#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
828#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
829#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
830#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
831#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
832#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
833#define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min
834
835
836int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v);
837void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
838void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
839void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b,
840 unsigned int k, snd_interval_t *c);
841void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k,
842 const snd_interval_t *b, snd_interval_t *c);
843int snd_interval_list(snd_interval_t *i, unsigned int count, unsigned int *list, unsigned int mask);
844int snd_interval_ratnum(snd_interval_t *i,
845 unsigned int rats_count, ratnum_t *rats,
846 unsigned int *nump, unsigned int *denp);
847
848void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params);
849void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, snd_pcm_hw_param_t var);
1da177e4
LT		 850int snd_pcm_hw_param_near(snd_pcm_substream_t *substream,
851 snd_pcm_hw_params_t *params,
852 snd_pcm_hw_param_t var,
853 unsigned int val, int *dir);
854int snd_pcm_hw_param_set(snd_pcm_substream_t *pcm,
855 snd_pcm_hw_params_t *params,
856 snd_pcm_hw_param_t var,
857 unsigned int val, int dir);
858int snd_pcm_hw_params_choose(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
859
860int snd_pcm_hw_refine(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
1da177e4
LT		 861
862int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream);
863int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream);
864
865int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
866 u_int32_t mask);
867int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
868 u_int64_t mask);
869int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
870 unsigned int min, unsigned int max);
871int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var);
872int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime,
873 unsigned int cond,
874 snd_pcm_hw_param_t var,
875 snd_pcm_hw_constraint_list_t *l);
876int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime,
877 unsigned int cond,
878 snd_pcm_hw_param_t var,
879 snd_pcm_hw_constraint_ratnums_t *r);
880int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime,
881 unsigned int cond,
882 snd_pcm_hw_param_t var,
883 snd_pcm_hw_constraint_ratdens_t *r);
884int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime,
885 unsigned int cond,
886 unsigned int width,
887 unsigned int msbits);
888int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime,
889 unsigned int cond,
890 snd_pcm_hw_param_t var,
891 unsigned long step);
892int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime,
893 unsigned int cond,
894 snd_pcm_hw_param_t var);
895int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime,
896 unsigned int cond,
897 int var,
898 snd_pcm_hw_rule_func_t func, void *private,
899 int dep, ...);
900
901int snd_pcm_format_signed(snd_pcm_format_t format);
902int snd_pcm_format_unsigned(snd_pcm_format_t format);
903int snd_pcm_format_linear(snd_pcm_format_t format);
904int snd_pcm_format_little_endian(snd_pcm_format_t format);
905int snd_pcm_format_big_endian(snd_pcm_format_t format);
344babaa 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 */
913/* int snd_pcm_format_cpu_endian(snd_pcm_format_t format); */
914#ifdef SNDRV_LITTLE_ENDIAN
915#define snd_pcm_format_cpu_endian snd_pcm_format_little_endian
916#else
917#define snd_pcm_format_cpu_endian snd_pcm_format_big_endian
918#endif
1da177e4
LT		 919int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
920int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
9502dcad 921ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1da177e4
LT		 922const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
923int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
924snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
925const char *snd_pcm_format_name(snd_pcm_format_t format);
926
927void snd_pcm_set_ops(snd_pcm_t * pcm, int direction, snd_pcm_ops_t *ops);
928void snd_pcm_set_sync(snd_pcm_substream_t * substream);
929int snd_pcm_lib_interleave_len(snd_pcm_substream_t *substream);
930int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream,
931 unsigned int cmd, void *arg);
932int snd_pcm_update_hw_ptr(snd_pcm_substream_t *substream);
933int snd_pcm_playback_xrun_check(snd_pcm_substream_t *substream);
934int snd_pcm_capture_xrun_check(snd_pcm_substream_t *substream);
935int snd_pcm_playback_xrun_asap(snd_pcm_substream_t *substream);
936int snd_pcm_capture_xrun_asap(snd_pcm_substream_t *substream);
937void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t new_hw_ptr);
938void snd_pcm_tick_prepare(snd_pcm_substream_t *substream);
939void snd_pcm_tick_set(snd_pcm_substream_t *substream, unsigned long ticks);
940void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream);
941void snd_pcm_period_elapsed(snd_pcm_substream_t *substream);
942snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream,
943 const void __user *buf,
944 snd_pcm_uframes_t frames);
945snd_pcm_sframes_t snd_pcm_lib_read(snd_pcm_substream_t *substream,
946 void __user *buf, snd_pcm_uframes_t frames);
947snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream,
948 void __user **bufs, snd_pcm_uframes_t frames);
949snd_pcm_sframes_t snd_pcm_lib_readv(snd_pcm_substream_t *substream,
950 void __user **bufs, snd_pcm_uframes_t frames);
951
952int snd_pcm_limit_hw_rates(snd_pcm_runtime_t *runtime);
953
954static inline void snd_pcm_set_runtime_buffer(snd_pcm_substream_t *substream,
955 struct snd_dma_buffer *bufp)
956{
957 snd_pcm_runtime_t *runtime = substream->runtime;
958 if (bufp) {
959 runtime->dma_buffer_p = bufp;
960 runtime->dma_area = bufp->area;
961 runtime->dma_addr = bufp->addr;
962 runtime->dma_bytes = bufp->bytes;
963 } else {
964 runtime->dma_buffer_p = NULL;
965 runtime->dma_area = NULL;
966 runtime->dma_addr = 0;
967 runtime->dma_bytes = 0;
968 }
969}
970
971/*
972 * Timer interface
973 */
974
975void snd_pcm_timer_resolution_change(snd_pcm_substream_t *substream);
976void snd_pcm_timer_init(snd_pcm_substream_t * substream);
977void snd_pcm_timer_done(snd_pcm_substream_t * substream);
978
979/*
980 * Memory
981 */
982
983int snd_pcm_lib_preallocate_free(snd_pcm_substream_t *substream);
984int snd_pcm_lib_preallocate_free_for_all(snd_pcm_t *pcm);
985int snd_pcm_lib_preallocate_pages(snd_pcm_substream_t *substream,
986 int type, struct device *data,
987 size_t size, size_t max);
988int snd_pcm_lib_preallocate_pages_for_all(snd_pcm_t *pcm,
989 int type, void *data,
990 size_t size, size_t max);
991int snd_pcm_lib_malloc_pages(snd_pcm_substream_t *substream, size_t size);
992int snd_pcm_lib_free_pages(snd_pcm_substream_t *substream);
993
994#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data)
995#define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size)
996#define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
997struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset);
998
999/* handle mmap counter - PCM mmap callback should handle this counter properly */
1000static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1001{
1002 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
1003 atomic_inc(&substream->runtime->mmap_count);
1004}
1005
1006static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1007{
1008 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
1009 atomic_dec(&substream->runtime->mmap_count);
1010}
1011
1012/* mmap for io-memory area */
1013#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1014#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
1015int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area);
1016#else
1017#define SNDRV_PCM_INFO_MMAP_IOMEM 0
1018#define snd_pcm_lib_mmap_iomem NULL
1019#endif
1020
1021static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1022{
1023 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1024}
1025
1026/*
1027 * Misc
1028 */
1029
1030#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1031 (IEC958_AES1_CON_ORIGINAL<<8)|\
1032 (IEC958_AES1_CON_PCM_CODER<<8)|\
1033 (IEC958_AES3_CON_FS_48000<<24))
1034
1035#endif /* __SOUND_PCM_H */
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