pcm.h 34.6 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
#ifndef __SOUND_PCM_H
#define __SOUND_PCM_H

/*
 *  Digital Audio (PCM) abstract layer
 *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
 *                   Abramo Bagnara <abramo@alsa-project.org>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <sound/asound.h>
Jaroslav Kysela's avatar
Jaroslav Kysela committed
27
#include <sound/memalloc.h>
28
#include <linux/poll.h>
29
#include <linux/bitops.h>
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

typedef sndrv_pcm_uframes_t snd_pcm_uframes_t;
typedef sndrv_pcm_sframes_t snd_pcm_sframes_t;
typedef enum sndrv_pcm_class snd_pcm_class_t;
typedef enum sndrv_pcm_subclass snd_pcm_subclass_t;
typedef enum sndrv_pcm_stream snd_pcm_stream_t;
typedef enum sndrv_pcm_access snd_pcm_access_t;
typedef enum sndrv_pcm_format snd_pcm_format_t;
typedef enum sndrv_pcm_subformat snd_pcm_subformat_t;
typedef enum sndrv_pcm_state snd_pcm_state_t;
typedef union sndrv_pcm_sync_id snd_pcm_sync_id_t;
typedef struct sndrv_pcm_info snd_pcm_info_t;
typedef enum sndrv_pcm_hw_param snd_pcm_hw_param_t;
typedef struct sndrv_pcm_hw_params snd_pcm_hw_params_t;
typedef enum sndrv_pcm_start snd_pcm_start_t;
typedef enum sndrv_pcm_xrun snd_pcm_xrun_t;
typedef enum sndrv_pcm_tstamp snd_pcm_tstamp_t;
typedef struct sndrv_pcm_sw_params snd_pcm_sw_params_t;
typedef struct sndrv_pcm_channel_info snd_pcm_channel_info_t;
typedef struct sndrv_pcm_status snd_pcm_status_t;
typedef struct sndrv_pcm_mmap_status snd_pcm_mmap_status_t;
typedef struct sndrv_pcm_mmap_control snd_pcm_mmap_control_t;
52
typedef struct sndrv_mask snd_mask_t;
Jaroslav Kysela's avatar
Jaroslav Kysela committed
53
typedef struct snd_sg_buf snd_pcm_sgbuf_t;
54

Jaroslav Kysela's avatar
Jaroslav Kysela committed
55 56
#define snd_pcm_substream_chip(substream) ((substream)->private_data)
#define snd_pcm_chip(pcm) ((pcm)->private_data)
57 58 59 60

typedef struct _snd_pcm_file snd_pcm_file_t;
typedef struct _snd_pcm_runtime snd_pcm_runtime_t;

Jaroslav Kysela's avatar
Jaroslav Kysela committed
61
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
62 63 64 65 66 67 68 69 70
#include "pcm_oss.h"
#endif

/*
 *  Hardware (lowlevel) section
 */

typedef struct _snd_pcm_hardware {
	unsigned int info;		/* SNDRV_PCM_INFO_* */
71
	u64 formats;			/* SNDRV_PCM_FMTBIT_* */
72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
	unsigned int rates;		/* SNDRV_PCM_RATE_* */
	unsigned int rate_min;		/* min rate */
	unsigned int rate_max;		/* max rate */
	unsigned int channels_min;	/* min channels */
	unsigned int channels_max;	/* max channels */
	size_t buffer_bytes_max;	/* max buffer size */
	size_t period_bytes_min;	/* min period size */
	size_t period_bytes_max;	/* max period size */
	unsigned int periods_min;	/* min # of periods */
	unsigned int periods_max;	/* max # of periods */
	size_t fifo_size;		/* fifo size in bytes */
} snd_pcm_hardware_t;

typedef struct _snd_pcm_ops {
	int (*open)(snd_pcm_substream_t *substream);
	int (*close)(snd_pcm_substream_t *substream);
	int (*ioctl)(snd_pcm_substream_t * substream,
		     unsigned int cmd, void *arg);
	int (*hw_params)(snd_pcm_substream_t * substream, snd_pcm_hw_params_t * params);
	int (*hw_free)(snd_pcm_substream_t *substream);
	int (*prepare)(snd_pcm_substream_t * substream);
	int (*trigger)(snd_pcm_substream_t * substream, int cmd);
	snd_pcm_uframes_t (*pointer)(snd_pcm_substream_t * substream);
	int (*copy)(snd_pcm_substream_t *substream, int channel, snd_pcm_uframes_t pos,
96
		    void __user *buf, snd_pcm_uframes_t count);
97 98
	int (*silence)(snd_pcm_substream_t *substream, int channel, 
		       snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
99
	struct page *(*page)(snd_pcm_substream_t *substream, unsigned long offset);
Takashi Iwai's avatar
Takashi Iwai committed
100
	int (*mmap)(snd_pcm_substream_t *substream, struct vm_area_struct *vma);
Jaroslav Kysela's avatar
Jaroslav Kysela committed
101
	int (*ack)(snd_pcm_substream_t *substream);
102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124
} snd_pcm_ops_t;

/*
 *
 */

#define SNDRV_PCM_DEVICES		8

#define SNDRV_PCM_IOCTL1_FALSE		((void *)0)
#define SNDRV_PCM_IOCTL1_TRUE		((void *)1)

#define SNDRV_PCM_IOCTL1_RESET		0
#define SNDRV_PCM_IOCTL1_INFO		1
#define SNDRV_PCM_IOCTL1_CHANNEL_INFO	2
#define SNDRV_PCM_IOCTL1_GSTATE		3

#define SNDRV_PCM_TRIGGER_STOP		0
#define SNDRV_PCM_TRIGGER_START		1
#define SNDRV_PCM_TRIGGER_PAUSE_PUSH	3
#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE	4
#define SNDRV_PCM_TRIGGER_SUSPEND	5
#define SNDRV_PCM_TRIGGER_RESUME	6

Jaroslav Kysela's avatar
Jaroslav Kysela committed
125 126
#define SNDRV_PCM_POS_XRUN		((snd_pcm_uframes_t)-1)

127
/* If you change this don't forget to change rates[] table in pcm_native.c */
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152
#define SNDRV_PCM_RATE_5512		(1<<0)		/* 5512Hz */
#define SNDRV_PCM_RATE_8000		(1<<1)		/* 8000Hz */
#define SNDRV_PCM_RATE_11025		(1<<2)		/* 11025Hz */
#define SNDRV_PCM_RATE_16000		(1<<3)		/* 16000Hz */
#define SNDRV_PCM_RATE_22050		(1<<4)		/* 22050Hz */
#define SNDRV_PCM_RATE_32000		(1<<5)		/* 32000Hz */
#define SNDRV_PCM_RATE_44100		(1<<6)		/* 44100Hz */
#define SNDRV_PCM_RATE_48000		(1<<7)		/* 48000Hz */
#define SNDRV_PCM_RATE_64000		(1<<8)		/* 64000Hz */
#define SNDRV_PCM_RATE_88200		(1<<9)		/* 88200Hz */
#define SNDRV_PCM_RATE_96000		(1<<10)		/* 96000Hz */
#define SNDRV_PCM_RATE_176400		(1<<11)		/* 176400Hz */
#define SNDRV_PCM_RATE_192000		(1<<12)		/* 192000Hz */

#define SNDRV_PCM_RATE_CONTINUOUS	(1<<30)		/* continuous range */
#define SNDRV_PCM_RATE_KNOT		(1<<31)		/* supports more non-continuos rates */

#define SNDRV_PCM_RATE_8000_44100	(SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
					 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
					 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
#define SNDRV_PCM_RATE_8000_48000	(SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
#define SNDRV_PCM_RATE_8000_96000	(SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
					 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
#define SNDRV_PCM_RATE_8000_192000	(SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
					 SNDRV_PCM_RATE_192000)
153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190
#define SNDRV_PCM_FMTBIT_S8		(1ULL << SNDRV_PCM_FORMAT_S8)
#define SNDRV_PCM_FMTBIT_U8		(1ULL << SNDRV_PCM_FORMAT_U8)
#define SNDRV_PCM_FMTBIT_S16_LE		(1ULL << SNDRV_PCM_FORMAT_S16_LE)
#define SNDRV_PCM_FMTBIT_S16_BE		(1ULL << SNDRV_PCM_FORMAT_S16_BE)
#define SNDRV_PCM_FMTBIT_U16_LE		(1ULL << SNDRV_PCM_FORMAT_U16_LE)
#define SNDRV_PCM_FMTBIT_U16_BE		(1ULL << SNDRV_PCM_FORMAT_U16_BE)
#define SNDRV_PCM_FMTBIT_S24_LE		(1ULL << SNDRV_PCM_FORMAT_S24_LE)
#define SNDRV_PCM_FMTBIT_S24_BE		(1ULL << SNDRV_PCM_FORMAT_S24_BE)
#define SNDRV_PCM_FMTBIT_U24_LE		(1ULL << SNDRV_PCM_FORMAT_U24_LE)
#define SNDRV_PCM_FMTBIT_U24_BE		(1ULL << SNDRV_PCM_FORMAT_U24_BE)
#define SNDRV_PCM_FMTBIT_S32_LE		(1ULL << SNDRV_PCM_FORMAT_S32_LE)
#define SNDRV_PCM_FMTBIT_S32_BE		(1ULL << SNDRV_PCM_FORMAT_S32_BE)
#define SNDRV_PCM_FMTBIT_U32_LE		(1ULL << SNDRV_PCM_FORMAT_U32_LE)
#define SNDRV_PCM_FMTBIT_U32_BE		(1ULL << SNDRV_PCM_FORMAT_U32_BE)
#define SNDRV_PCM_FMTBIT_FLOAT_LE	(1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
#define SNDRV_PCM_FMTBIT_FLOAT_BE	(1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
#define SNDRV_PCM_FMTBIT_FLOAT64_LE	(1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
#define SNDRV_PCM_FMTBIT_FLOAT64_BE	(1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
#define SNDRV_PCM_FMTBIT_MU_LAW		(1ULL << SNDRV_PCM_FORMAT_MU_LAW)
#define SNDRV_PCM_FMTBIT_A_LAW		(1ULL << SNDRV_PCM_FORMAT_A_LAW)
#define SNDRV_PCM_FMTBIT_IMA_ADPCM	(1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
#define SNDRV_PCM_FMTBIT_MPEG		(1ULL << SNDRV_PCM_FORMAT_MPEG)
#define SNDRV_PCM_FMTBIT_GSM		(1ULL << SNDRV_PCM_FORMAT_GSM)
#define SNDRV_PCM_FMTBIT_SPECIAL	(1ULL << SNDRV_PCM_FORMAT_SPECIAL)
#define SNDRV_PCM_FMTBIT_S24_3LE	(1ULL << SNDRV_PCM_FORMAT_S24_3LE)
#define SNDRV_PCM_FMTBIT_U24_3LE	(1ULL << SNDRV_PCM_FORMAT_U24_3LE)
#define SNDRV_PCM_FMTBIT_S24_3BE	(1ULL << SNDRV_PCM_FORMAT_S24_3BE)
#define SNDRV_PCM_FMTBIT_U24_3BE	(1ULL << SNDRV_PCM_FORMAT_U24_3BE)
#define SNDRV_PCM_FMTBIT_S20_3LE	(1ULL << SNDRV_PCM_FORMAT_S20_3LE)
#define SNDRV_PCM_FMTBIT_U20_3LE	(1ULL << SNDRV_PCM_FORMAT_U20_3LE)
#define SNDRV_PCM_FMTBIT_S20_3BE	(1ULL << SNDRV_PCM_FORMAT_S20_3BE)
#define SNDRV_PCM_FMTBIT_U20_3BE	(1ULL << SNDRV_PCM_FORMAT_U20_3BE)
#define SNDRV_PCM_FMTBIT_S18_3LE	(1ULL << SNDRV_PCM_FORMAT_S18_3LE)
#define SNDRV_PCM_FMTBIT_U18_3LE	(1ULL << SNDRV_PCM_FORMAT_U18_3LE)
#define SNDRV_PCM_FMTBIT_S18_3BE	(1ULL << SNDRV_PCM_FORMAT_S18_3BE)
#define SNDRV_PCM_FMTBIT_U18_3BE	(1ULL << SNDRV_PCM_FORMAT_U18_3BE)
191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233

#ifdef SNDRV_LITTLE_ENDIAN
#define SNDRV_PCM_FMTBIT_S16		SNDRV_PCM_FMTBIT_S16_LE
#define SNDRV_PCM_FMTBIT_U16		SNDRV_PCM_FMTBIT_U16_LE
#define SNDRV_PCM_FMTBIT_S24		SNDRV_PCM_FMTBIT_S24_LE
#define SNDRV_PCM_FMTBIT_U24		SNDRV_PCM_FMTBIT_U24_LE
#define SNDRV_PCM_FMTBIT_S32		SNDRV_PCM_FMTBIT_S32_LE
#define SNDRV_PCM_FMTBIT_U32		SNDRV_PCM_FMTBIT_U32_LE
#define SNDRV_PCM_FMTBIT_FLOAT		SNDRV_PCM_FMTBIT_FLOAT_LE
#define SNDRV_PCM_FMTBIT_FLOAT64	SNDRV_PCM_FMTBIT_FLOAT64_LE
#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
#endif
#ifdef SNDRV_BIG_ENDIAN
#define SNDRV_PCM_FMTBIT_S16		SNDRV_PCM_FMTBIT_S16_BE
#define SNDRV_PCM_FMTBIT_U16		SNDRV_PCM_FMTBIT_U16_BE
#define SNDRV_PCM_FMTBIT_S24		SNDRV_PCM_FMTBIT_S24_BE
#define SNDRV_PCM_FMTBIT_U24		SNDRV_PCM_FMTBIT_U24_BE
#define SNDRV_PCM_FMTBIT_S32		SNDRV_PCM_FMTBIT_S32_BE
#define SNDRV_PCM_FMTBIT_U32		SNDRV_PCM_FMTBIT_U32_BE
#define SNDRV_PCM_FMTBIT_FLOAT		SNDRV_PCM_FMTBIT_FLOAT_BE
#define SNDRV_PCM_FMTBIT_FLOAT64	SNDRV_PCM_FMTBIT_FLOAT64_BE
#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
#endif

struct _snd_pcm_file {
	snd_pcm_substream_t * substream;
	struct _snd_pcm_file * next;
};

typedef struct _snd_pcm_hw_rule snd_pcm_hw_rule_t;

typedef int (*snd_pcm_hw_rule_func_t)(snd_pcm_hw_params_t *params,
				      snd_pcm_hw_rule_t *rule);

struct _snd_pcm_hw_rule {
	unsigned int cond;
	snd_pcm_hw_rule_func_t func;
	int var;
	int deps[4];
	void *private;
};

typedef struct _snd_pcm_hw_constraints {
234 235
	snd_mask_t masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 
			 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
236 237 238 239 240 241 242
	snd_interval_t intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
			     SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
	unsigned int rules_num;
	unsigned int rules_all;
	snd_pcm_hw_rule_t *rules;
} snd_pcm_hw_constraints_t;

243 244
static inline snd_mask_t *constrs_mask(snd_pcm_hw_constraints_t *constrs,
				       snd_pcm_hw_param_t var)
245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308
{
	return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
}

static inline snd_interval_t *constrs_interval(snd_pcm_hw_constraints_t *constrs,
					  snd_pcm_hw_param_t var)
{
	return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
}

typedef struct {
	unsigned int num;
	unsigned int den_min, den_max, den_step;
} ratnum_t;

typedef struct {
	unsigned int num_min, num_max, num_step;
	unsigned int den;
} ratden_t;

typedef struct {
	int nrats;
	ratnum_t *rats;
} snd_pcm_hw_constraint_ratnums_t;

typedef struct {
	int nrats;
	ratden_t *rats;
} snd_pcm_hw_constraint_ratdens_t;

typedef struct {
	unsigned int count;
	unsigned int *list;
	unsigned int mask;
} snd_pcm_hw_constraint_list_t;

struct _snd_pcm_runtime {
	/* -- Status -- */
	snd_pcm_substream_t *trigger_master;
	snd_timestamp_t trigger_tstamp;	/* trigger timestamp */
	int overrange;
	snd_pcm_uframes_t avail_max;
	snd_pcm_uframes_t hw_ptr_base;	/* Position at buffer restart */
	snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/

	/* -- HW params -- */
	snd_pcm_access_t access;	/* access mode */
	snd_pcm_format_t format;	/* SNDRV_PCM_FORMAT_* */
	snd_pcm_subformat_t subformat;	/* subformat */
	unsigned int rate;		/* rate in Hz */
	unsigned int channels;		/* channels */
	snd_pcm_uframes_t period_size;	/* period size */
	unsigned int periods;		/* periods */
	snd_pcm_uframes_t buffer_size;	/* buffer size */
	unsigned int tick_time;		/* tick time */
	snd_pcm_uframes_t min_align;	/* Min alignment for the format */
	size_t byte_align;
	unsigned int frame_bits;
	unsigned int sample_bits;
	unsigned int info;
	unsigned int rate_num;
	unsigned int rate_den;

	/* -- SW params -- */
Jaroslav Kysela's avatar
Jaroslav Kysela committed
309
	int tstamp_timespec;		/* use timeval (0) or timespec (1) */
310 311 312 313 314 315 316 317 318 319 320
	snd_pcm_tstamp_t tstamp_mode;	/* mmap timestamp is updated */
  	unsigned int period_step;
	unsigned int sleep_min;		/* min ticks to sleep */
	snd_pcm_uframes_t xfer_align;	/* xfer size need to be a multiple */
	snd_pcm_uframes_t start_threshold;
	snd_pcm_uframes_t stop_threshold;
	snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
						noise is nearest than this */
	snd_pcm_uframes_t silence_size;	/* Silence filling size */
	snd_pcm_uframes_t boundary;	/* pointers wrap point */

Jaroslav Kysela's avatar
Jaroslav Kysela committed
321 322
	snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
	snd_pcm_uframes_t silence_filled; /* size filled with silence */
323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353

	snd_pcm_sync_id_t sync;		/* hardware synchronization ID */

	/* -- mmap -- */
	volatile snd_pcm_mmap_status_t *status;
	volatile snd_pcm_mmap_control_t *control;
	atomic_t mmap_count;

	/* -- locking / scheduling -- */
	wait_queue_head_t sleep;
	struct timer_list tick_timer;
	struct fasync_struct *fasync;

	/* -- private section -- */
	void *private_data;
	void (*private_free)(snd_pcm_runtime_t *runtime);

	/* -- hardware description -- */
	snd_pcm_hardware_t hw;
	snd_pcm_hw_constraints_t hw_constraints;

	/* -- interrupt callbacks -- */
	void (*transfer_ack_begin)(snd_pcm_substream_t *substream);
	void (*transfer_ack_end)(snd_pcm_substream_t *substream);

	/* -- timer -- */
	unsigned int timer_resolution;	/* timer resolution */

	/* -- DMA -- */           
	unsigned char *dma_area;	/* DMA area */
	dma_addr_t dma_addr;		/* physical bus address (not accessible from main CPU) */
Jaroslav Kysela's avatar
Jaroslav Kysela committed
354
	size_t dma_bytes;		/* size of DMA area */
Jaroslav Kysela's avatar
Jaroslav Kysela committed
355 356

	struct snd_dma_buffer *dma_buffer_p;	/* allocated buffer */
357

Jaroslav Kysela's avatar
Jaroslav Kysela committed
358
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
359 360 361 362 363
	/* -- OSS things -- */
	snd_pcm_oss_runtime_t oss;
#endif
};

Jaroslav Kysela's avatar
Jaroslav Kysela committed
364 365 366 367 368
typedef struct _snd_pcm_group {		/* keep linked substreams */
	spinlock_t lock;
	struct list_head substreams;
} snd_pcm_group_t;

369 370 371
struct _snd_pcm_substream {
	snd_pcm_t *pcm;
	snd_pcm_str_t *pstr;
Jaroslav Kysela's avatar
Jaroslav Kysela committed
372
	void *private_data;		/* copied from pcm->private_data */
373 374 375 376
	int number;
	char name[32];			/* substream name */
	int stream;			/* stream (direction) */
	size_t buffer_bytes_max;	/* limit ring buffer size */
Jaroslav Kysela's avatar
Jaroslav Kysela committed
377
	struct snd_dma_buffer dma_buffer;
Jaroslav Kysela's avatar
Jaroslav Kysela committed
378
	unsigned int dma_buf_id;
379 380
	size_t dma_max;
	/* -- hardware operations -- */
Jaroslav Kysela's avatar
Jaroslav Kysela committed
381
	unsigned int open_flag: 1;	/* lowlevel device has been opened */
382 383 384 385 386
	snd_pcm_ops_t *ops;
	/* -- runtime information -- */
	snd_pcm_runtime_t *runtime;
        /* -- timer section -- */
	snd_timer_t *timer;		/* timer */
Jaroslav Kysela's avatar
Jaroslav Kysela committed
387
	int timer_running: 1;		/* time is running */
388 389 390 391
	spinlock_t timer_lock;
	/* -- next substream -- */
	snd_pcm_substream_t *next;
	/* -- linked substreams -- */
Jaroslav Kysela's avatar
Jaroslav Kysela committed
392 393 394 395
	struct list_head link_list;	/* linked list member */
	snd_pcm_group_t self_group;	/* fake group for non linked substream (with substream lock inside) */
	snd_pcm_group_t *group;		/* pointer to current group */
	/* -- assigned files -- */
396 397
	snd_pcm_file_t *file;
	struct file *ffile;
Jaroslav Kysela's avatar
Jaroslav Kysela committed
398
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
399 400 401 402 403 404 405 406 407 408 409
	/* -- OSS things -- */
	snd_pcm_oss_substream_t oss;
#endif
	snd_info_entry_t *proc_root;
	snd_info_entry_t *proc_info_entry;
	snd_info_entry_t *proc_hw_params_entry;
	snd_info_entry_t *proc_sw_params_entry;
	snd_info_entry_t *proc_status_entry;
	snd_info_entry_t *proc_prealloc_entry;
};

Jaroslav Kysela's avatar
Jaroslav Kysela committed
410
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
411 412 413 414 415 416 417 418 419 420 421 422 423
#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL || ((substream)->oss.file != NULL))
#else
#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL)
#endif


struct _snd_pcm_str {
	int stream;				/* stream (direction) */
	snd_pcm_t *pcm;
	/* -- substreams -- */
	unsigned int substream_count;
	unsigned int substream_opened;
	snd_pcm_substream_t *substream;
Jaroslav Kysela's avatar
Jaroslav Kysela committed
424
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
425 426 427 428 429 430 431
	/* -- OSS things -- */
	snd_pcm_oss_stream_t oss;
#endif
	snd_pcm_file_t *files;
	snd_minor_t *reg;
	snd_info_entry_t *proc_root;
	snd_info_entry_t *proc_info_entry;
432
#ifdef CONFIG_SND_DEBUG
433
	unsigned int xrun_debug;	/* 0 = disabled, 1 = verbose, 2 = stacktrace */
434 435
	snd_info_entry_t *proc_xrun_debug_entry;
#endif
436 437 438 439 440 441 442 443 444 445 446 447 448 449 450
};

struct _snd_pcm {
	snd_card_t *card;
	unsigned int device;	/* device number */
	unsigned int info_flags;
	unsigned short dev_class;
	unsigned short dev_subclass;
	char id[64];
	char name[80];
	snd_pcm_str_t streams[2];
	struct semaphore open_mutex;
	wait_queue_head_t open_wait;
	void *private_data;
	void (*private_free) (snd_pcm_t *pcm);
Jaroslav Kysela's avatar
Jaroslav Kysela committed
451
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
452 453 454 455 456
	snd_pcm_oss_t oss;
#endif
};

typedef struct _snd_pcm_notify {
Jaroslav Kysela's avatar
Jaroslav Kysela committed
457 458 459
	int (*n_register) (snd_pcm_t * pcm);
	int (*n_disconnect) (snd_pcm_t * pcm);
	int (*n_unregister) (snd_pcm_t * pcm);
460 461 462 463 464 465 466 467 468 469 470 471 472
	struct list_head list;
} snd_pcm_notify_t;

/*
 *  Registering
 */

extern snd_pcm_t *snd_pcm_devices[];
extern snd_minor_t snd_pcm_reg[2];

int snd_pcm_new(snd_card_t * card, char *id, int device,
		int playback_count, int capture_count,
		snd_pcm_t **rpcm);
473
int snd_pcm_new_stream(snd_pcm_t *pcm, int stream, int substream_count);
474 475 476 477 478 479 480

int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree);

/*
 *  Native I/O
 */

Jaroslav Kysela's avatar
Jaroslav Kysela committed
481 482
extern rwlock_t snd_pcm_link_rwlock;

483
int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info);
484
int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user *info);
485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541
int snd_pcm_status(snd_pcm_substream_t * substream, snd_pcm_status_t *status);
int snd_pcm_prepare(snd_pcm_substream_t *substream);
int snd_pcm_start(snd_pcm_substream_t *substream);
int snd_pcm_stop(snd_pcm_substream_t *substream, int status);
#ifdef CONFIG_PM
int snd_pcm_suspend(snd_pcm_substream_t *substream);
int snd_pcm_suspend_all(snd_pcm_t *pcm);
#endif
int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
int snd_pcm_open(struct inode *inode, struct file *file);
int snd_pcm_release(struct inode *inode, struct file *file);
unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait);
unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait);
int snd_pcm_open_substream(snd_pcm_t *pcm, int stream, snd_pcm_substream_t **rsubstream);
void snd_pcm_release_substream(snd_pcm_substream_t *substream);
void snd_pcm_vma_notify_data(void *client, void *data);
int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file, struct vm_area_struct *area);

#if BITS_PER_LONG >= 64

static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
{
	*rem = *n % div;
	*n /= div;
}

#elif defined(i386)

static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
{
	u_int32_t low, high;
	low = *n & 0xffffffff;
	high = *n >> 32;
	if (high) {
		u_int32_t high1 = high % div;
		high /= div;
		asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
		*n = (u_int64_t)high << 32 | low;
	} else {
		*n = low / div;
		*rem = low % div;
	}
}
#else

static inline void divl(u_int32_t high, u_int32_t low,
			u_int32_t div,
			u_int32_t *q, u_int32_t *r)
{
	u_int64_t n = (u_int64_t)high << 32 | low;
	u_int64_t d = (u_int64_t)div << 31;
	u_int32_t q1 = 0;
	int c = 32;
	while (n > 0xffffffffU) {
		q1 <<= 1;
542
		if (n >= d) {
543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582
			n -= d;
			q1 |= 1;
		}
		d >>= 1;
		c--;
	}
	q1 <<= c;
	if (n) {
		low = n;
		*q = q1 | (low / div);
		*r = low % div;
	} else {
		*r = 0;
		*q = q1;
	}
	return;
}

static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
{
	u_int32_t low, high;
	low = *n & 0xffffffff;
	high = *n >> 32;
	if (high) {
		u_int32_t high1 = high % div;
		u_int32_t low1 = low;
		high /= div;
		divl(high1, low1, div, &low, rem);
		*n = (u_int64_t)high << 32 | low;
	} else {
		*n = low / div;
		*rem = low % div;
	}
}
#endif

/*
 *  PCM library
 */

Jaroslav Kysela's avatar
Jaroslav Kysela committed
583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629
static inline int snd_pcm_stream_linked(snd_pcm_substream_t *substream)
{
	return substream->group != &substream->self_group;
}

static inline void snd_pcm_stream_lock(snd_pcm_substream_t *substream)
{
	read_lock(&snd_pcm_link_rwlock);
	spin_lock(&substream->self_group.lock);
}

static inline void snd_pcm_stream_unlock(snd_pcm_substream_t *substream)
{
	spin_unlock(&substream->self_group.lock);
	read_unlock(&snd_pcm_link_rwlock);
}

static inline void snd_pcm_stream_lock_irq(snd_pcm_substream_t *substream)
{
	read_lock_irq(&snd_pcm_link_rwlock);
	spin_lock(&substream->self_group.lock);
}

static inline void snd_pcm_stream_unlock_irq(snd_pcm_substream_t *substream)
{
	spin_unlock(&substream->self_group.lock);
	read_unlock_irq(&snd_pcm_link_rwlock);
}

#define snd_pcm_stream_lock_irqsave(substream, flags) \
do { \
	read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
	spin_lock(&substream->self_group.lock); \
} while (0)

#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
do { \
	spin_unlock(&substream->self_group.lock); \
	read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
} while (0)

#define snd_pcm_group_for_each(pos, substream) \
	list_for_each(pos, &substream->group->substreams)

#define snd_pcm_group_substream_entry(pos) \
	list_entry(pos, snd_pcm_substream_t, link_list)

630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728
static inline int snd_pcm_running(snd_pcm_substream_t *substream)
{
	return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
		(substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
		 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
}

static inline ssize_t bytes_to_samples(snd_pcm_runtime_t *runtime, ssize_t size)
{
	return size * 8 / runtime->sample_bits;
}

static inline snd_pcm_sframes_t bytes_to_frames(snd_pcm_runtime_t *runtime, ssize_t size)
{
	return size * 8 / runtime->frame_bits;
}

static inline ssize_t samples_to_bytes(snd_pcm_runtime_t *runtime, ssize_t size)
{
	return size * runtime->sample_bits / 8;
}

static inline ssize_t frames_to_bytes(snd_pcm_runtime_t *runtime, snd_pcm_sframes_t size)
{
	return size * runtime->frame_bits / 8;
}

static inline int frame_aligned(snd_pcm_runtime_t *runtime, ssize_t bytes)
{
	return bytes % runtime->byte_align == 0;
}

static inline size_t snd_pcm_lib_buffer_bytes(snd_pcm_substream_t *substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	return frames_to_bytes(runtime, runtime->buffer_size);
}

static inline size_t snd_pcm_lib_period_bytes(snd_pcm_substream_t *substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	return frames_to_bytes(runtime, runtime->period_size);
}

/*
 *  result is: 0 ... (boundary - 1)
 */
static inline snd_pcm_uframes_t snd_pcm_playback_avail(snd_pcm_runtime_t *runtime)
{
	snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
	if (avail < 0)
		avail += runtime->boundary;
	else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
		avail -= runtime->boundary;
	return avail;
}

/*
 *  result is: 0 ... (boundary - 1)
 */
static inline snd_pcm_uframes_t snd_pcm_capture_avail(snd_pcm_runtime_t *runtime)
{
	snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
	if (avail < 0)
		avail += runtime->boundary;
	return avail;
}

static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(snd_pcm_runtime_t *runtime)
{
	return runtime->buffer_size - snd_pcm_playback_avail(runtime);
}

static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(snd_pcm_runtime_t *runtime)
{
	return runtime->buffer_size - snd_pcm_capture_avail(runtime);
}

static inline void snd_pcm_trigger_done(snd_pcm_substream_t *substream, 
					snd_pcm_substream_t *master)
{
	substream->runtime->trigger_master = master;
}

static inline int hw_is_mask(int var)
{
	return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
		var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
}

static inline int hw_is_interval(int var)
{
	return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
		var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
}

static inline snd_mask_t *hw_param_mask(snd_pcm_hw_params_t *params,
				     snd_pcm_hw_param_t var)
{
729
	return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749
}

static inline snd_interval_t *hw_param_interval(snd_pcm_hw_params_t *params,
					     snd_pcm_hw_param_t var)
{
	return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
}

static inline const snd_mask_t *hw_param_mask_c(const snd_pcm_hw_params_t *params,
					     snd_pcm_hw_param_t var)
{
	return (const snd_mask_t *)hw_param_mask((snd_pcm_hw_params_t*) params, var);
}

static inline const snd_interval_t *hw_param_interval_c(const snd_pcm_hw_params_t *params,
						     snd_pcm_hw_param_t var)
{
	return (const snd_interval_t *)hw_param_interval((snd_pcm_hw_params_t*) params, var);
}

750 751 752
#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801
#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
#define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min


int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v);
void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b, 
			  unsigned int k, snd_interval_t *c);
void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k,
			  const snd_interval_t *b, snd_interval_t *c);
int snd_interval_list(snd_interval_t *i, unsigned int count, unsigned int *list, unsigned int mask);
int snd_interval_step(snd_interval_t *i, unsigned int min, unsigned int step);
int snd_interval_ratnum(snd_interval_t *i,
			unsigned int rats_count, ratnum_t *rats,
			unsigned int *nump, unsigned int *denp);
int snd_interval_ratden(snd_interval_t *i,
			unsigned int rats_count, ratden_t *rats,
			unsigned int *nump, unsigned int *denp);

void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params);
void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, snd_pcm_hw_param_t var);
int snd_pcm_hw_param_min(snd_pcm_substream_t *substream, 
			 snd_pcm_hw_params_t *params,
			 snd_pcm_hw_param_t var,
			 unsigned int val, int *dir);
int snd_pcm_hw_param_max(snd_pcm_substream_t *substream, 
			 snd_pcm_hw_params_t *params,
			 snd_pcm_hw_param_t var,
			 unsigned int val, int *dir);
int snd_pcm_hw_param_setinteger(snd_pcm_substream_t *substream, 
				snd_pcm_hw_params_t *params,
				snd_pcm_hw_param_t var);
int snd_pcm_hw_param_first(snd_pcm_substream_t *substream, 
			   snd_pcm_hw_params_t *params,
			   snd_pcm_hw_param_t var, int *dir);
int snd_pcm_hw_param_last(snd_pcm_substream_t *substream, 
			  snd_pcm_hw_params_t *params,
			  snd_pcm_hw_param_t var, int *dir);
int snd_pcm_hw_param_near(snd_pcm_substream_t *substream, 
			  snd_pcm_hw_params_t *params,
			  snd_pcm_hw_param_t var, 
			  unsigned int val, int *dir);
Jaroslav Kysela's avatar
Jaroslav Kysela committed
802 803 804 805
int snd_pcm_hw_param_set(snd_pcm_substream_t *pcm,
			 snd_pcm_hw_params_t *params,
			 snd_pcm_hw_param_t var,
			 unsigned int val, int dir);
806 807 808 809 810 811 812 813
int snd_pcm_hw_params_choose(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);

int snd_pcm_hw_refine(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);

int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream);
int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream);

int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
814 815 816
			       u_int32_t mask);
int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
				 u_int64_t mask);
817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839
int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
				 unsigned int min, unsigned int max);
int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var);
int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime, 
			       unsigned int cond,
			       snd_pcm_hw_param_t var,
			       snd_pcm_hw_constraint_list_t *l);
int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime, 
				  unsigned int cond,
				  snd_pcm_hw_param_t var,
				  snd_pcm_hw_constraint_ratnums_t *r);
int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime, 
				  unsigned int cond,
				  snd_pcm_hw_param_t var,
				  snd_pcm_hw_constraint_ratdens_t *r);
int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime, 
				 unsigned int cond,
				 unsigned int width,
				 unsigned int msbits);
int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime,
			       unsigned int cond,
			       snd_pcm_hw_param_t var,
			       unsigned long step);
840 841 842
int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime,
			       unsigned int cond,
			       snd_pcm_hw_param_t var);
843 844 845 846 847 848 849 850 851 852 853 854 855
int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime,
			unsigned int cond,
			int var,
			snd_pcm_hw_rule_func_t func, void *private,
			int dep, ...);

int snd_pcm_format_signed(snd_pcm_format_t format);
int snd_pcm_format_unsigned(snd_pcm_format_t format);
int snd_pcm_format_linear(snd_pcm_format_t format);
int snd_pcm_format_little_endian(snd_pcm_format_t format);
int snd_pcm_format_big_endian(snd_pcm_format_t format);
int snd_pcm_format_width(snd_pcm_format_t format);			/* in bits */
int snd_pcm_format_physical_width(snd_pcm_format_t format);		/* in bits */
Jaroslav Kysela's avatar
Jaroslav Kysela committed
856
const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
857 858 859
int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
Jaroslav Kysela's avatar
Jaroslav Kysela committed
860 861 862
const char *snd_pcm_format_name(snd_pcm_format_t format);
const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat);

863 864 865 866 867 868 869 870 871 872
void snd_pcm_set_ops(snd_pcm_t * pcm, int direction, snd_pcm_ops_t *ops);
void snd_pcm_set_sync(snd_pcm_substream_t * substream);
int snd_pcm_lib_interleave_len(snd_pcm_substream_t *substream);
int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream,
		      unsigned int cmd, void *arg);                      
int snd_pcm_update_hw_ptr(snd_pcm_substream_t *substream);
int snd_pcm_playback_xrun_check(snd_pcm_substream_t *substream);
int snd_pcm_capture_xrun_check(snd_pcm_substream_t *substream);
int snd_pcm_playback_xrun_asap(snd_pcm_substream_t *substream);
int snd_pcm_capture_xrun_asap(snd_pcm_substream_t *substream);
Jaroslav Kysela's avatar
Jaroslav Kysela committed
873
void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t new_hw_ptr);
874 875 876 877 878 879 880 881 882 883 884 885
int snd_pcm_playback_ready(snd_pcm_substream_t *substream);
int snd_pcm_capture_ready(snd_pcm_substream_t *substream);
long snd_pcm_playback_ready_jiffies(snd_pcm_substream_t *substream);
long snd_pcm_capture_ready_jiffies(snd_pcm_substream_t *substream);
int snd_pcm_playback_data(snd_pcm_substream_t *substream);
int snd_pcm_playback_empty(snd_pcm_substream_t *substream);
int snd_pcm_capture_empty(snd_pcm_substream_t *substream);
void snd_pcm_tick_prepare(snd_pcm_substream_t *substream);
void snd_pcm_tick_set(snd_pcm_substream_t *substream, unsigned long ticks);
void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream);
void snd_pcm_period_elapsed(snd_pcm_substream_t *substream);
snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream,
886 887
				    const void __user *buf,
				    snd_pcm_uframes_t frames);
888
snd_pcm_sframes_t snd_pcm_lib_read(snd_pcm_substream_t *substream,
889
				   void __user *buf, snd_pcm_uframes_t frames);
890
snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream,
891
				     void __user **bufs, snd_pcm_uframes_t frames);
892
snd_pcm_sframes_t snd_pcm_lib_readv(snd_pcm_substream_t *substream,
893
				    void __user **bufs, snd_pcm_uframes_t frames);
894

895 896
int snd_pcm_limit_hw_rates(snd_pcm_runtime_t *runtime);

Jaroslav Kysela's avatar
Jaroslav Kysela committed
897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912
static inline void snd_pcm_set_runtime_buffer(snd_pcm_substream_t *substream,
					      struct snd_dma_buffer *bufp)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	if (bufp) {
		runtime->dma_buffer_p = bufp;
		runtime->dma_area = bufp->area;
		runtime->dma_addr = bufp->addr;
		runtime->dma_bytes = bufp->bytes;
	} else {
		runtime->dma_buffer_p = NULL;
		runtime->dma_area = NULL;
		runtime->dma_addr = 0;
		runtime->dma_bytes = 0;
	}
}
913

914 915 916 917 918 919 920 921 922 923 924 925 926 927 928
/*
 *  Timer interface
 */

void snd_pcm_timer_resolution_change(snd_pcm_substream_t *substream);
void snd_pcm_timer_init(snd_pcm_substream_t * substream);
void snd_pcm_timer_done(snd_pcm_substream_t * substream);

/*
 *  Memory
 */

int snd_pcm_lib_preallocate_free(snd_pcm_substream_t *substream);
int snd_pcm_lib_preallocate_free_for_all(snd_pcm_t *pcm);
int snd_pcm_lib_preallocate_pages(snd_pcm_substream_t *substream,
929
				  int type, struct device *data,
930
				  size_t size, size_t max);
931
int snd_pcm_lib_preallocate_pages_for_all(snd_pcm_t *pcm,
932 933
					  int type, void *data,
					  size_t size, size_t max);
934 935 936
int snd_pcm_lib_malloc_pages(snd_pcm_substream_t *substream, size_t size);
int snd_pcm_lib_free_pages(snd_pcm_substream_t *substream);

Jaroslav Kysela's avatar
Jaroslav Kysela committed
937
#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data)
Jaroslav Kysela's avatar
Jaroslav Kysela committed
938 939 940
#define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size)
#define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset);
941

Takashi Iwai's avatar
Takashi Iwai committed
942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963
/* handle mmap counter - PCM mmap callback should handle this counter properly */
static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
{
	snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
	atomic_inc(&substream->runtime->mmap_count);
}

static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
{
	snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
	atomic_dec(&substream->runtime->mmap_count);
}

/* mmap for io-memory area */
#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
#define SNDRV_PCM_INFO_MMAP_IOMEM	SNDRV_PCM_INFO_MMAP
int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area);
#else
#define SNDRV_PCM_INFO_MMAP_IOMEM	0
#define snd_pcm_lib_mmap_iomem	NULL
#endif

964 965 966 967 968 969 970 971 972 973 974 975 976 977 978
static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
{
	*max = dma < 4 ? 64 * 1024 : 128 * 1024;
}

/*
 *  Misc
 */

#define SNDRV_PCM_DEFAULT_CON_SPDIF	(IEC958_AES0_CON_EMPHASIS_NONE|\
					 (IEC958_AES1_CON_ORIGINAL<<8)|\
					 (IEC958_AES1_CON_PCM_CODER<<8)|\
					 (IEC958_AES3_CON_FS_48000<<24))

#endif /* __SOUND_PCM_H */