ASoC: Remove redundant codec pointer from DAIs
[linux-2.6.git] / include / sound / pcm.h
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@perex.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 <sound/minors.h>
29 #include <linux/poll.h>
30 #include <linux/mm.h>
31 #include <linux/bitops.h>
32
33 #define snd_pcm_substream_chip(substream) ((substream)->private_data)
34 #define snd_pcm_chip(pcm) ((pcm)->private_data)
35
36 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
37 #include "pcm_oss.h"
38 #endif
39
40 /*
41  *  Hardware (lowlevel) section
42  */
43
44 struct snd_pcm_hardware {
45         unsigned int info;              /* SNDRV_PCM_INFO_* */
46         u64 formats;                    /* SNDRV_PCM_FMTBIT_* */
47         unsigned int rates;             /* SNDRV_PCM_RATE_* */
48         unsigned int rate_min;          /* min rate */
49         unsigned int rate_max;          /* max rate */
50         unsigned int channels_min;      /* min channels */
51         unsigned int channels_max;      /* max channels */
52         size_t buffer_bytes_max;        /* max buffer size */
53         size_t period_bytes_min;        /* min period size */
54         size_t period_bytes_max;        /* max period size */
55         unsigned int periods_min;       /* min # of periods */
56         unsigned int periods_max;       /* max # of periods */
57         size_t fifo_size;               /* fifo size in bytes */
58 };
59
60 struct snd_pcm_substream;
61
62 struct snd_pcm_ops {
63         int (*open)(struct snd_pcm_substream *substream);
64         int (*close)(struct snd_pcm_substream *substream);
65         int (*ioctl)(struct snd_pcm_substream * substream,
66                      unsigned int cmd, void *arg);
67         int (*hw_params)(struct snd_pcm_substream *substream,
68                          struct snd_pcm_hw_params *params);
69         int (*hw_free)(struct snd_pcm_substream *substream);
70         int (*prepare)(struct snd_pcm_substream *substream);
71         int (*trigger)(struct snd_pcm_substream *substream, int cmd);
72         snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
73         int (*copy)(struct snd_pcm_substream *substream, int channel,
74                     snd_pcm_uframes_t pos,
75                     void __user *buf, snd_pcm_uframes_t count);
76         int (*silence)(struct snd_pcm_substream *substream, int channel, 
77                        snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
78         struct page *(*page)(struct snd_pcm_substream *substream,
79                              unsigned long offset);
80         int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
81         int (*ack)(struct snd_pcm_substream *substream);
82 };
83
84 /*
85  *
86  */
87
88 #if defined(CONFIG_SND_DYNAMIC_MINORS)
89 #define SNDRV_PCM_DEVICES       (SNDRV_OS_MINORS-2)
90 #else
91 #define SNDRV_PCM_DEVICES       8
92 #endif
93
94 #define SNDRV_PCM_IOCTL1_FALSE          ((void *)0)
95 #define SNDRV_PCM_IOCTL1_TRUE           ((void *)1)
96
97 #define SNDRV_PCM_IOCTL1_RESET          0
98 #define SNDRV_PCM_IOCTL1_INFO           1
99 #define SNDRV_PCM_IOCTL1_CHANNEL_INFO   2
100 #define SNDRV_PCM_IOCTL1_GSTATE         3
101
102 #define SNDRV_PCM_TRIGGER_STOP          0
103 #define SNDRV_PCM_TRIGGER_START         1
104 #define SNDRV_PCM_TRIGGER_PAUSE_PUSH    3
105 #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
106 #define SNDRV_PCM_TRIGGER_SUSPEND       5
107 #define SNDRV_PCM_TRIGGER_RESUME        6
108
109 #define SNDRV_PCM_POS_XRUN              ((snd_pcm_uframes_t)-1)
110
111 /* If you change this don't forget to change rates[] table in pcm_native.c */
112 #define SNDRV_PCM_RATE_5512             (1<<0)          /* 5512Hz */
113 #define SNDRV_PCM_RATE_8000             (1<<1)          /* 8000Hz */
114 #define SNDRV_PCM_RATE_11025            (1<<2)          /* 11025Hz */
115 #define SNDRV_PCM_RATE_16000            (1<<3)          /* 16000Hz */
116 #define SNDRV_PCM_RATE_22050            (1<<4)          /* 22050Hz */
117 #define SNDRV_PCM_RATE_32000            (1<<5)          /* 32000Hz */
118 #define SNDRV_PCM_RATE_44100            (1<<6)          /* 44100Hz */
119 #define SNDRV_PCM_RATE_48000            (1<<7)          /* 48000Hz */
120 #define SNDRV_PCM_RATE_64000            (1<<8)          /* 64000Hz */
121 #define SNDRV_PCM_RATE_88200            (1<<9)          /* 88200Hz */
122 #define SNDRV_PCM_RATE_96000            (1<<10)         /* 96000Hz */
123 #define SNDRV_PCM_RATE_176400           (1<<11)         /* 176400Hz */
124 #define SNDRV_PCM_RATE_192000           (1<<12)         /* 192000Hz */
125
126 #define SNDRV_PCM_RATE_CONTINUOUS       (1<<30)         /* continuous range */
127 #define SNDRV_PCM_RATE_KNOT             (1<<31)         /* supports more non-continuos rates */
128
129 #define SNDRV_PCM_RATE_8000_44100       (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
130                                          SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
131                                          SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
132 #define SNDRV_PCM_RATE_8000_48000       (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
133 #define SNDRV_PCM_RATE_8000_96000       (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
134                                          SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
135 #define SNDRV_PCM_RATE_8000_192000      (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
136                                          SNDRV_PCM_RATE_192000)
137 #define SNDRV_PCM_FMTBIT_S8             (1ULL << SNDRV_PCM_FORMAT_S8)
138 #define SNDRV_PCM_FMTBIT_U8             (1ULL << SNDRV_PCM_FORMAT_U8)
139 #define SNDRV_PCM_FMTBIT_S16_LE         (1ULL << SNDRV_PCM_FORMAT_S16_LE)
140 #define SNDRV_PCM_FMTBIT_S16_BE         (1ULL << SNDRV_PCM_FORMAT_S16_BE)
141 #define SNDRV_PCM_FMTBIT_U16_LE         (1ULL << SNDRV_PCM_FORMAT_U16_LE)
142 #define SNDRV_PCM_FMTBIT_U16_BE         (1ULL << SNDRV_PCM_FORMAT_U16_BE)
143 #define SNDRV_PCM_FMTBIT_S24_LE         (1ULL << SNDRV_PCM_FORMAT_S24_LE)
144 #define SNDRV_PCM_FMTBIT_S24_BE         (1ULL << SNDRV_PCM_FORMAT_S24_BE)
145 #define SNDRV_PCM_FMTBIT_U24_LE         (1ULL << SNDRV_PCM_FORMAT_U24_LE)
146 #define SNDRV_PCM_FMTBIT_U24_BE         (1ULL << SNDRV_PCM_FORMAT_U24_BE)
147 #define SNDRV_PCM_FMTBIT_S32_LE         (1ULL << SNDRV_PCM_FORMAT_S32_LE)
148 #define SNDRV_PCM_FMTBIT_S32_BE         (1ULL << SNDRV_PCM_FORMAT_S32_BE)
149 #define SNDRV_PCM_FMTBIT_U32_LE         (1ULL << SNDRV_PCM_FORMAT_U32_LE)
150 #define SNDRV_PCM_FMTBIT_U32_BE         (1ULL << SNDRV_PCM_FORMAT_U32_BE)
151 #define SNDRV_PCM_FMTBIT_FLOAT_LE       (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
152 #define SNDRV_PCM_FMTBIT_FLOAT_BE       (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
153 #define SNDRV_PCM_FMTBIT_FLOAT64_LE     (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
154 #define SNDRV_PCM_FMTBIT_FLOAT64_BE     (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
155 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
156 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
157 #define SNDRV_PCM_FMTBIT_MU_LAW         (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
158 #define SNDRV_PCM_FMTBIT_A_LAW          (1ULL << SNDRV_PCM_FORMAT_A_LAW)
159 #define SNDRV_PCM_FMTBIT_IMA_ADPCM      (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
160 #define SNDRV_PCM_FMTBIT_MPEG           (1ULL << SNDRV_PCM_FORMAT_MPEG)
161 #define SNDRV_PCM_FMTBIT_GSM            (1ULL << SNDRV_PCM_FORMAT_GSM)
162 #define SNDRV_PCM_FMTBIT_SPECIAL        (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
163 #define SNDRV_PCM_FMTBIT_S24_3LE        (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
164 #define SNDRV_PCM_FMTBIT_U24_3LE        (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
165 #define SNDRV_PCM_FMTBIT_S24_3BE        (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
166 #define SNDRV_PCM_FMTBIT_U24_3BE        (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
167 #define SNDRV_PCM_FMTBIT_S20_3LE        (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
168 #define SNDRV_PCM_FMTBIT_U20_3LE        (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
169 #define SNDRV_PCM_FMTBIT_S20_3BE        (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
170 #define SNDRV_PCM_FMTBIT_U20_3BE        (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
171 #define SNDRV_PCM_FMTBIT_S18_3LE        (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
172 #define SNDRV_PCM_FMTBIT_U18_3LE        (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
173 #define SNDRV_PCM_FMTBIT_S18_3BE        (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
174 #define SNDRV_PCM_FMTBIT_U18_3BE        (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
175
176 #ifdef SNDRV_LITTLE_ENDIAN
177 #define SNDRV_PCM_FMTBIT_S16            SNDRV_PCM_FMTBIT_S16_LE
178 #define SNDRV_PCM_FMTBIT_U16            SNDRV_PCM_FMTBIT_U16_LE
179 #define SNDRV_PCM_FMTBIT_S24            SNDRV_PCM_FMTBIT_S24_LE
180 #define SNDRV_PCM_FMTBIT_U24            SNDRV_PCM_FMTBIT_U24_LE
181 #define SNDRV_PCM_FMTBIT_S32            SNDRV_PCM_FMTBIT_S32_LE
182 #define SNDRV_PCM_FMTBIT_U32            SNDRV_PCM_FMTBIT_U32_LE
183 #define SNDRV_PCM_FMTBIT_FLOAT          SNDRV_PCM_FMTBIT_FLOAT_LE
184 #define SNDRV_PCM_FMTBIT_FLOAT64        SNDRV_PCM_FMTBIT_FLOAT64_LE
185 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
186 #endif
187 #ifdef SNDRV_BIG_ENDIAN
188 #define SNDRV_PCM_FMTBIT_S16            SNDRV_PCM_FMTBIT_S16_BE
189 #define SNDRV_PCM_FMTBIT_U16            SNDRV_PCM_FMTBIT_U16_BE
190 #define SNDRV_PCM_FMTBIT_S24            SNDRV_PCM_FMTBIT_S24_BE
191 #define SNDRV_PCM_FMTBIT_U24            SNDRV_PCM_FMTBIT_U24_BE
192 #define SNDRV_PCM_FMTBIT_S32            SNDRV_PCM_FMTBIT_S32_BE
193 #define SNDRV_PCM_FMTBIT_U32            SNDRV_PCM_FMTBIT_U32_BE
194 #define SNDRV_PCM_FMTBIT_FLOAT          SNDRV_PCM_FMTBIT_FLOAT_BE
195 #define SNDRV_PCM_FMTBIT_FLOAT64        SNDRV_PCM_FMTBIT_FLOAT64_BE
196 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
197 #endif
198
199 struct snd_pcm_file {
200         struct snd_pcm_substream *substream;
201         int no_compat_mmap;
202 };
203
204 struct snd_pcm_hw_rule;
205 typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
206                                       struct snd_pcm_hw_rule *rule);
207
208 struct snd_pcm_hw_rule {
209         unsigned int cond;
210         snd_pcm_hw_rule_func_t func;
211         int var;
212         int deps[4];
213         void *private;
214 };
215
216 struct snd_pcm_hw_constraints {
217         struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 
218                          SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
219         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
220                              SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
221         unsigned int rules_num;
222         unsigned int rules_all;
223         struct snd_pcm_hw_rule *rules;
224 };
225
226 static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
227                                             snd_pcm_hw_param_t var)
228 {
229         return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
230 }
231
232 static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
233                                                     snd_pcm_hw_param_t var)
234 {
235         return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
236 }
237
238 struct snd_ratnum {
239         unsigned int num;
240         unsigned int den_min, den_max, den_step;
241 };
242
243 struct snd_ratden {
244         unsigned int num_min, num_max, num_step;
245         unsigned int den;
246 };
247
248 struct snd_pcm_hw_constraint_ratnums {
249         int nrats;
250         struct snd_ratnum *rats;
251 };
252
253 struct snd_pcm_hw_constraint_ratdens {
254         int nrats;
255         struct snd_ratden *rats;
256 };
257
258 struct snd_pcm_hw_constraint_list {
259         unsigned int count;
260         unsigned int *list;
261         unsigned int mask;
262 };
263
264 struct snd_pcm_runtime {
265         /* -- Status -- */
266         struct snd_pcm_substream *trigger_master;
267         struct timespec trigger_tstamp; /* trigger timestamp */
268         int overrange;
269         snd_pcm_uframes_t avail_max;
270         snd_pcm_uframes_t hw_ptr_base;  /* Position at buffer restart */
271         snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
272         unsigned long hw_ptr_jiffies;   /* Time when hw_ptr is updated */
273
274         /* -- HW params -- */
275         snd_pcm_access_t access;        /* access mode */
276         snd_pcm_format_t format;        /* SNDRV_PCM_FORMAT_* */
277         snd_pcm_subformat_t subformat;  /* subformat */
278         unsigned int rate;              /* rate in Hz */
279         unsigned int channels;          /* channels */
280         snd_pcm_uframes_t period_size;  /* period size */
281         unsigned int periods;           /* periods */
282         snd_pcm_uframes_t buffer_size;  /* buffer size */
283         snd_pcm_uframes_t min_align;    /* Min alignment for the format */
284         size_t byte_align;
285         unsigned int frame_bits;
286         unsigned int sample_bits;
287         unsigned int info;
288         unsigned int rate_num;
289         unsigned int rate_den;
290
291         /* -- SW params -- */
292         int tstamp_mode;                /* mmap timestamp is updated */
293         unsigned int period_step;
294         snd_pcm_uframes_t start_threshold;
295         snd_pcm_uframes_t stop_threshold;
296         snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
297                                                 noise is nearest than this */
298         snd_pcm_uframes_t silence_size; /* Silence filling size */
299         snd_pcm_uframes_t boundary;     /* pointers wrap point */
300
301         snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
302         snd_pcm_uframes_t silence_filled; /* size filled with silence */
303
304         union snd_pcm_sync_id sync;     /* hardware synchronization ID */
305
306         /* -- mmap -- */
307         struct snd_pcm_mmap_status *status;
308         struct snd_pcm_mmap_control *control;
309
310         /* -- locking / scheduling -- */
311         wait_queue_head_t sleep;
312         struct fasync_struct *fasync;
313
314         /* -- private section -- */
315         void *private_data;
316         void (*private_free)(struct snd_pcm_runtime *runtime);
317
318         /* -- hardware description -- */
319         struct snd_pcm_hardware hw;
320         struct snd_pcm_hw_constraints hw_constraints;
321
322         /* -- interrupt callbacks -- */
323         void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
324         void (*transfer_ack_end)(struct snd_pcm_substream *substream);
325
326         /* -- timer -- */
327         unsigned int timer_resolution;  /* timer resolution */
328         int tstamp_type;                /* timestamp type */
329
330         /* -- DMA -- */           
331         unsigned char *dma_area;        /* DMA area */
332         dma_addr_t dma_addr;            /* physical bus address (not accessible from main CPU) */
333         size_t dma_bytes;               /* size of DMA area */
334
335         struct snd_dma_buffer *dma_buffer_p;    /* allocated buffer */
336
337 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
338         /* -- OSS things -- */
339         struct snd_pcm_oss_runtime oss;
340 #endif
341 };
342
343 struct snd_pcm_group {          /* keep linked substreams */
344         spinlock_t lock;
345         struct list_head substreams;
346         int count;
347 };
348
349 struct snd_pcm_substream {
350         struct snd_pcm *pcm;
351         struct snd_pcm_str *pstr;
352         void *private_data;             /* copied from pcm->private_data */
353         int number;
354         char name[32];                  /* substream name */
355         int stream;                     /* stream (direction) */
356         char latency_id[20];            /* latency identifier */
357         size_t buffer_bytes_max;        /* limit ring buffer size */
358         struct snd_dma_buffer dma_buffer;
359         unsigned int dma_buf_id;
360         size_t dma_max;
361         /* -- hardware operations -- */
362         struct snd_pcm_ops *ops;
363         /* -- runtime information -- */
364         struct snd_pcm_runtime *runtime;
365         /* -- timer section -- */
366         struct snd_timer *timer;                /* timer */
367         unsigned timer_running: 1;      /* time is running */
368         /* -- next substream -- */
369         struct snd_pcm_substream *next;
370         /* -- linked substreams -- */
371         struct list_head link_list;     /* linked list member */
372         struct snd_pcm_group self_group;        /* fake group for non linked substream (with substream lock inside) */
373         struct snd_pcm_group *group;            /* pointer to current group */
374         /* -- assigned files -- */
375         void *file;
376         int ref_count;
377         atomic_t mmap_count;
378         unsigned int f_flags;
379         void (*pcm_release)(struct snd_pcm_substream *);
380 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
381         /* -- OSS things -- */
382         struct snd_pcm_oss_substream oss;
383 #endif
384 #ifdef CONFIG_SND_VERBOSE_PROCFS
385         struct snd_info_entry *proc_root;
386         struct snd_info_entry *proc_info_entry;
387         struct snd_info_entry *proc_hw_params_entry;
388         struct snd_info_entry *proc_sw_params_entry;
389         struct snd_info_entry *proc_status_entry;
390         struct snd_info_entry *proc_prealloc_entry;
391         struct snd_info_entry *proc_prealloc_max_entry;
392 #endif
393         /* misc flags */
394         unsigned int hw_opened: 1;
395 };
396
397 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
398
399
400 struct snd_pcm_str {
401         int stream;                             /* stream (direction) */
402         struct snd_pcm *pcm;
403         /* -- substreams -- */
404         unsigned int substream_count;
405         unsigned int substream_opened;
406         struct snd_pcm_substream *substream;
407 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
408         /* -- OSS things -- */
409         struct snd_pcm_oss_stream oss;
410 #endif
411 #ifdef CONFIG_SND_VERBOSE_PROCFS
412         struct snd_info_entry *proc_root;
413         struct snd_info_entry *proc_info_entry;
414 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
415         unsigned int xrun_debug;        /* 0 = disabled, 1 = verbose, 2 = stacktrace */
416         struct snd_info_entry *proc_xrun_debug_entry;
417 #endif
418 #endif
419 };
420
421 struct snd_pcm {
422         struct snd_card *card;
423         struct list_head list;
424         int device; /* device number */
425         unsigned int info_flags;
426         unsigned short dev_class;
427         unsigned short dev_subclass;
428         char id[64];
429         char name[80];
430         struct snd_pcm_str streams[2];
431         struct mutex open_mutex;
432         wait_queue_head_t open_wait;
433         void *private_data;
434         void (*private_free) (struct snd_pcm *pcm);
435         struct device *dev; /* actual hw device this belongs to */
436 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
437         struct snd_pcm_oss oss;
438 #endif
439 };
440
441 struct snd_pcm_notify {
442         int (*n_register) (struct snd_pcm * pcm);
443         int (*n_disconnect) (struct snd_pcm * pcm);
444         int (*n_unregister) (struct snd_pcm * pcm);
445         struct list_head list;
446 };
447
448 /*
449  *  Registering
450  */
451
452 extern const struct file_operations snd_pcm_f_ops[2];
453
454 int snd_pcm_new(struct snd_card *card, const char *id, int device,
455                 int playback_count, int capture_count,
456                 struct snd_pcm **rpcm);
457 int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
458
459 int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
460
461 /*
462  *  Native I/O
463  */
464
465 extern rwlock_t snd_pcm_link_rwlock;
466
467 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
468 int snd_pcm_info_user(struct snd_pcm_substream *substream,
469                       struct snd_pcm_info __user *info);
470 int snd_pcm_status(struct snd_pcm_substream *substream,
471                    struct snd_pcm_status *status);
472 int snd_pcm_start(struct snd_pcm_substream *substream);
473 int snd_pcm_stop(struct snd_pcm_substream *substream, int status);
474 int snd_pcm_drain_done(struct snd_pcm_substream *substream);
475 #ifdef CONFIG_PM
476 int snd_pcm_suspend(struct snd_pcm_substream *substream);
477 int snd_pcm_suspend_all(struct snd_pcm *pcm);
478 #endif
479 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
480 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
481                            struct snd_pcm_substream **rsubstream);
482 void snd_pcm_release_substream(struct snd_pcm_substream *substream);
483 int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
484                              struct snd_pcm_substream **rsubstream);
485 void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
486 void snd_pcm_vma_notify_data(void *client, void *data);
487 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
488
489 #if BITS_PER_LONG >= 64
490
491 static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
492 {
493         *rem = *n % div;
494         *n /= div;
495 }
496
497 #elif defined(i386)
498
499 static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
500 {
501         u_int32_t low, high;
502         low = *n & 0xffffffff;
503         high = *n >> 32;
504         if (high) {
505                 u_int32_t high1 = high % div;
506                 high /= div;
507                 asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
508                 *n = (u_int64_t)high << 32 | low;
509         } else {
510                 *n = low / div;
511                 *rem = low % div;
512         }
513 }
514 #else
515
516 static inline void divl(u_int32_t high, u_int32_t low,
517                         u_int32_t div,
518                         u_int32_t *q, u_int32_t *r)
519 {
520         u_int64_t n = (u_int64_t)high << 32 | low;
521         u_int64_t d = (u_int64_t)div << 31;
522         u_int32_t q1 = 0;
523         int c = 32;
524         while (n > 0xffffffffU) {
525                 q1 <<= 1;
526                 if (n >= d) {
527                         n -= d;
528                         q1 |= 1;
529                 }
530                 d >>= 1;
531                 c--;
532         }
533         q1 <<= c;
534         if (n) {
535                 low = n;
536                 *q = q1 | (low / div);
537                 *r = low % div;
538         } else {
539                 *r = 0;
540                 *q = q1;
541         }
542         return;
543 }
544
545 static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
546 {
547         u_int32_t low, high;
548         low = *n & 0xffffffff;
549         high = *n >> 32;
550         if (high) {
551                 u_int32_t high1 = high % div;
552                 u_int32_t low1 = low;
553                 high /= div;
554                 divl(high1, low1, div, &low, rem);
555                 *n = (u_int64_t)high << 32 | low;
556         } else {
557                 *n = low / div;
558                 *rem = low % div;
559         }
560 }
561 #endif
562
563 /*
564  *  PCM library
565  */
566
567 static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
568 {
569         return substream->group != &substream->self_group;
570 }
571
572 static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
573 {
574         read_lock(&snd_pcm_link_rwlock);
575         spin_lock(&substream->self_group.lock);
576 }
577
578 static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
579 {
580         spin_unlock(&substream->self_group.lock);
581         read_unlock(&snd_pcm_link_rwlock);
582 }
583
584 static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
585 {
586         read_lock_irq(&snd_pcm_link_rwlock);
587         spin_lock(&substream->self_group.lock);
588 }
589
590 static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
591 {
592         spin_unlock(&substream->self_group.lock);
593         read_unlock_irq(&snd_pcm_link_rwlock);
594 }
595
596 #define snd_pcm_stream_lock_irqsave(substream, flags) \
597 do { \
598         read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
599         spin_lock(&substream->self_group.lock); \
600 } while (0)
601
602 #define snd_pcm_stream_unlock_irqrestore(substream, flags) \
603 do { \
604         spin_unlock(&substream->self_group.lock); \
605         read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
606 } while (0)
607
608 #define snd_pcm_group_for_each_entry(s, substream) \
609         list_for_each_entry(s, &substream->group->substreams, link_list)
610
611 static inline int snd_pcm_running(struct snd_pcm_substream *substream)
612 {
613         return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
614                 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
615                  substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
616 }
617
618 static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
619 {
620         return size * 8 / runtime->sample_bits;
621 }
622
623 static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
624 {
625         return size * 8 / runtime->frame_bits;
626 }
627
628 static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
629 {
630         return size * runtime->sample_bits / 8;
631 }
632
633 static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
634 {
635         return size * runtime->frame_bits / 8;
636 }
637
638 static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
639 {
640         return bytes % runtime->byte_align == 0;
641 }
642
643 static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
644 {
645         struct snd_pcm_runtime *runtime = substream->runtime;
646         return frames_to_bytes(runtime, runtime->buffer_size);
647 }
648
649 static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
650 {
651         struct snd_pcm_runtime *runtime = substream->runtime;
652         return frames_to_bytes(runtime, runtime->period_size);
653 }
654
655 /*
656  *  result is: 0 ... (boundary - 1)
657  */
658 static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
659 {
660         snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
661         if (avail < 0)
662                 avail += runtime->boundary;
663         else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
664                 avail -= runtime->boundary;
665         return avail;
666 }
667
668 /*
669  *  result is: 0 ... (boundary - 1)
670  */
671 static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
672 {
673         snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
674         if (avail < 0)
675                 avail += runtime->boundary;
676         return avail;
677 }
678
679 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
680 {
681         return runtime->buffer_size - snd_pcm_playback_avail(runtime);
682 }
683
684 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
685 {
686         return runtime->buffer_size - snd_pcm_capture_avail(runtime);
687 }
688
689 /**
690  * snd_pcm_playback_ready - check whether the playback buffer is available
691  * @substream: the pcm substream instance
692  *
693  * Checks whether enough free space is available on the playback buffer.
694  *
695  * Returns non-zero if available, or zero if not.
696  */
697 static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
698 {
699         struct snd_pcm_runtime *runtime = substream->runtime;
700         return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
701 }
702
703 /**
704  * snd_pcm_capture_ready - check whether the capture buffer is available
705  * @substream: the pcm substream instance
706  *
707  * Checks whether enough capture data is available on the capture buffer.
708  *
709  * Returns non-zero if available, or zero if not.
710  */
711 static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
712 {
713         struct snd_pcm_runtime *runtime = substream->runtime;
714         return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
715 }
716
717 /**
718  * snd_pcm_playback_data - check whether any data exists on the playback buffer
719  * @substream: the pcm substream instance
720  *
721  * Checks whether any data exists on the playback buffer. If stop_threshold
722  * is bigger or equal to boundary, then this function returns always non-zero.
723  *
724  * Returns non-zero if exists, or zero if not.
725  */
726 static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
727 {
728         struct snd_pcm_runtime *runtime = substream->runtime;
729         
730         if (runtime->stop_threshold >= runtime->boundary)
731                 return 1;
732         return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
733 }
734
735 /**
736  * snd_pcm_playback_empty - check whether the playback buffer is empty
737  * @substream: the pcm substream instance
738  *
739  * Checks whether the playback buffer is empty.
740  *
741  * Returns non-zero if empty, or zero if not.
742  */
743 static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
744 {
745         struct snd_pcm_runtime *runtime = substream->runtime;
746         return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
747 }
748
749 /**
750  * snd_pcm_capture_empty - check whether the capture buffer is empty
751  * @substream: the pcm substream instance
752  *
753  * Checks whether the capture buffer is empty.
754  *
755  * Returns non-zero if empty, or zero if not.
756  */
757 static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
758 {
759         struct snd_pcm_runtime *runtime = substream->runtime;
760         return snd_pcm_capture_avail(runtime) == 0;
761 }
762
763 static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, 
764                                         struct snd_pcm_substream *master)
765 {
766         substream->runtime->trigger_master = master;
767 }
768
769 static inline int hw_is_mask(int var)
770 {
771         return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
772                 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
773 }
774
775 static inline int hw_is_interval(int var)
776 {
777         return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
778                 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
779 }
780
781 static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
782                                      snd_pcm_hw_param_t var)
783 {
784         return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
785 }
786
787 static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
788                                              snd_pcm_hw_param_t var)
789 {
790         return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
791 }
792
793 static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
794                                              snd_pcm_hw_param_t var)
795 {
796         return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
797 }
798
799 static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
800                                                      snd_pcm_hw_param_t var)
801 {
802         return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
803 }
804
805 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
806 #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
807 #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
808 #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
809 #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
810 #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
811 #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
812 #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
813 #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
814 #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
815
816
817 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
818 void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
819 void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
820 void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, 
821                           unsigned int k, struct snd_interval *c);
822 void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
823                           const struct snd_interval *b, struct snd_interval *c);
824 int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask);
825 int snd_interval_ratnum(struct snd_interval *i,
826                         unsigned int rats_count, struct snd_ratnum *rats,
827                         unsigned int *nump, unsigned int *denp);
828
829 void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
830 void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
831 int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
832
833 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
834
835 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
836 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
837
838 int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
839                                u_int32_t mask);
840 int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
841                                  u_int64_t mask);
842 int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
843                                  unsigned int min, unsigned int max);
844 int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
845 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 
846                                unsigned int cond,
847                                snd_pcm_hw_param_t var,
848                                struct snd_pcm_hw_constraint_list *l);
849 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 
850                                   unsigned int cond,
851                                   snd_pcm_hw_param_t var,
852                                   struct snd_pcm_hw_constraint_ratnums *r);
853 int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, 
854                                   unsigned int cond,
855                                   snd_pcm_hw_param_t var,
856                                   struct snd_pcm_hw_constraint_ratdens *r);
857 int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, 
858                                  unsigned int cond,
859                                  unsigned int width,
860                                  unsigned int msbits);
861 int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
862                                unsigned int cond,
863                                snd_pcm_hw_param_t var,
864                                unsigned long step);
865 int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
866                                unsigned int cond,
867                                snd_pcm_hw_param_t var);
868 int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
869                         unsigned int cond,
870                         int var,
871                         snd_pcm_hw_rule_func_t func, void *private,
872                         int dep, ...);
873
874 int snd_pcm_format_signed(snd_pcm_format_t format);
875 int snd_pcm_format_unsigned(snd_pcm_format_t format);
876 int snd_pcm_format_linear(snd_pcm_format_t format);
877 int snd_pcm_format_little_endian(snd_pcm_format_t format);
878 int snd_pcm_format_big_endian(snd_pcm_format_t format);
879 #if 0 /* just for DocBook */
880 /**
881  * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
882  * @format: the format to check
883  *
884  * Returns 1 if the given PCM format is CPU-endian, 0 if
885  * opposite, or a negative error code if endian not specified.
886  */
887 int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
888 #endif /* DocBook */
889 #ifdef SNDRV_LITTLE_ENDIAN
890 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
891 #else
892 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
893 #endif
894 int snd_pcm_format_width(snd_pcm_format_t format);                      /* in bits */
895 int snd_pcm_format_physical_width(snd_pcm_format_t format);             /* in bits */
896 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
897 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
898 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
899 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
900
901 void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
902 void snd_pcm_set_sync(struct snd_pcm_substream *substream);
903 int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
904 int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
905                       unsigned int cmd, void *arg);                      
906 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
907 int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
908 int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
909 int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
910 int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
911 void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
912 void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
913 snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
914                                     const void __user *buf,
915                                     snd_pcm_uframes_t frames);
916 snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
917                                    void __user *buf, snd_pcm_uframes_t frames);
918 snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
919                                      void __user **bufs, snd_pcm_uframes_t frames);
920 snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
921                                     void __user **bufs, snd_pcm_uframes_t frames);
922
923 extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
924
925 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
926 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
927
928 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
929                                               struct snd_dma_buffer *bufp)
930 {
931         struct snd_pcm_runtime *runtime = substream->runtime;
932         if (bufp) {
933                 runtime->dma_buffer_p = bufp;
934                 runtime->dma_area = bufp->area;
935                 runtime->dma_addr = bufp->addr;
936                 runtime->dma_bytes = bufp->bytes;
937         } else {
938                 runtime->dma_buffer_p = NULL;
939                 runtime->dma_area = NULL;
940                 runtime->dma_addr = 0;
941                 runtime->dma_bytes = 0;
942         }
943 }
944
945 /*
946  *  Timer interface
947  */
948
949 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
950 void snd_pcm_timer_init(struct snd_pcm_substream *substream);
951 void snd_pcm_timer_done(struct snd_pcm_substream *substream);
952
953 static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
954                                    struct timespec *tv)
955 {
956         if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
957                 do_posix_clock_monotonic_gettime(tv);
958         else
959                 getnstimeofday(tv);
960 }
961
962 /*
963  *  Memory
964  */
965
966 int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
967 int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
968 int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
969                                   int type, struct device *data,
970                                   size_t size, size_t max);
971 int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
972                                           int type, void *data,
973                                           size_t size, size_t max);
974 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
975 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
976
977 /*
978  * SG-buffer handling
979  */
980 #define snd_pcm_substream_sgbuf(substream) \
981         ((substream)->runtime->dma_buffer_p->private_data)
982
983 static inline dma_addr_t
984 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
985 {
986         struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
987         return snd_sgbuf_get_addr(sg, ofs);
988 }
989
990 static inline void *
991 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
992 {
993         struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
994         return snd_sgbuf_get_ptr(sg, ofs);
995 }
996
997 struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
998                                     unsigned long offset);
999 unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
1000                                           unsigned int ofs, unsigned int size);
1001
1002 /* handle mmap counter - PCM mmap callback should handle this counter properly */
1003 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1004 {
1005         struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1006         atomic_inc(&substream->mmap_count);
1007 }
1008
1009 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1010 {
1011         struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1012         atomic_dec(&substream->mmap_count);
1013 }
1014
1015 /* mmap for io-memory area */
1016 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1017 #define SNDRV_PCM_INFO_MMAP_IOMEM       SNDRV_PCM_INFO_MMAP
1018 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1019 #else
1020 #define SNDRV_PCM_INFO_MMAP_IOMEM       0
1021 #define snd_pcm_lib_mmap_iomem  NULL
1022 #endif
1023
1024 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1025 {
1026         *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1027 }
1028
1029 /*
1030  *  Misc
1031  */
1032
1033 #define SNDRV_PCM_DEFAULT_CON_SPDIF     (IEC958_AES0_CON_EMPHASIS_NONE|\
1034                                          (IEC958_AES1_CON_ORIGINAL<<8)|\
1035                                          (IEC958_AES1_CON_PCM_CODER<<8)|\
1036                                          (IEC958_AES3_CON_FS_48000<<24))
1037
1038 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1039
1040 #endif /* __SOUND_PCM_H */