git.oblomov.eu Git - linux-2.6/blob - 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 #define SNDRV_PCM_IOCTL1_FIFO_SIZE      4
 102
 103 #define SNDRV_PCM_TRIGGER_STOP          0
 104 #define SNDRV_PCM_TRIGGER_START         1
 105 #define SNDRV_PCM_TRIGGER_PAUSE_PUSH    3
 106 #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
 107 #define SNDRV_PCM_TRIGGER_SUSPEND       5
 108 #define SNDRV_PCM_TRIGGER_RESUME        6
 109
 110 #define SNDRV_PCM_POS_XRUN              ((snd_pcm_uframes_t)-1)
 111
 112 /* If you change this don't forget to change rates[] table in pcm_native.c */
 113 #define SNDRV_PCM_RATE_5512             (1<<0)          /* 5512Hz */
 114 #define SNDRV_PCM_RATE_8000             (1<<1)          /* 8000Hz */
 115 #define SNDRV_PCM_RATE_11025            (1<<2)          /* 11025Hz */
 116 #define SNDRV_PCM_RATE_16000            (1<<3)          /* 16000Hz */
 117 #define SNDRV_PCM_RATE_22050            (1<<4)          /* 22050Hz */
 118 #define SNDRV_PCM_RATE_32000            (1<<5)          /* 32000Hz */
 119 #define SNDRV_PCM_RATE_44100            (1<<6)          /* 44100Hz */
 120 #define SNDRV_PCM_RATE_48000            (1<<7)          /* 48000Hz */
 121 #define SNDRV_PCM_RATE_64000            (1<<8)          /* 64000Hz */
 122 #define SNDRV_PCM_RATE_88200            (1<<9)          /* 88200Hz */
 123 #define SNDRV_PCM_RATE_96000            (1<<10)         /* 96000Hz */
 124 #define SNDRV_PCM_RATE_176400           (1<<11)         /* 176400Hz */
 125 #define SNDRV_PCM_RATE_192000           (1<<12)         /* 192000Hz */
 126
 127 #define SNDRV_PCM_RATE_CONTINUOUS       (1<<30)         /* continuous range */
 128 #define SNDRV_PCM_RATE_KNOT             (1<<31)         /* supports more non-continuos rates */
 129
 130 #define SNDRV_PCM_RATE_8000_44100       (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
 131                                          SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
 132                                          SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
 133 #define SNDRV_PCM_RATE_8000_48000       (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
 134 #define SNDRV_PCM_RATE_8000_96000       (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
 135                                          SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
 136 #define SNDRV_PCM_RATE_8000_192000      (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
 137                                          SNDRV_PCM_RATE_192000)
 138 #define SNDRV_PCM_FMTBIT_S8             (1ULL << SNDRV_PCM_FORMAT_S8)
 139 #define SNDRV_PCM_FMTBIT_U8             (1ULL << SNDRV_PCM_FORMAT_U8)
 140 #define SNDRV_PCM_FMTBIT_S16_LE         (1ULL << SNDRV_PCM_FORMAT_S16_LE)
 141 #define SNDRV_PCM_FMTBIT_S16_BE         (1ULL << SNDRV_PCM_FORMAT_S16_BE)
 142 #define SNDRV_PCM_FMTBIT_U16_LE         (1ULL << SNDRV_PCM_FORMAT_U16_LE)
 143 #define SNDRV_PCM_FMTBIT_U16_BE         (1ULL << SNDRV_PCM_FORMAT_U16_BE)
 144 #define SNDRV_PCM_FMTBIT_S24_LE         (1ULL << SNDRV_PCM_FORMAT_S24_LE)
 145 #define SNDRV_PCM_FMTBIT_S24_BE         (1ULL << SNDRV_PCM_FORMAT_S24_BE)
 146 #define SNDRV_PCM_FMTBIT_U24_LE         (1ULL << SNDRV_PCM_FORMAT_U24_LE)
 147 #define SNDRV_PCM_FMTBIT_U24_BE         (1ULL << SNDRV_PCM_FORMAT_U24_BE)
 148 #define SNDRV_PCM_FMTBIT_S32_LE         (1ULL << SNDRV_PCM_FORMAT_S32_LE)
 149 #define SNDRV_PCM_FMTBIT_S32_BE         (1ULL << SNDRV_PCM_FORMAT_S32_BE)
 150 #define SNDRV_PCM_FMTBIT_U32_LE         (1ULL << SNDRV_PCM_FORMAT_U32_LE)
 151 #define SNDRV_PCM_FMTBIT_U32_BE         (1ULL << SNDRV_PCM_FORMAT_U32_BE)
 152 #define SNDRV_PCM_FMTBIT_FLOAT_LE       (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
 153 #define SNDRV_PCM_FMTBIT_FLOAT_BE       (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
 154 #define SNDRV_PCM_FMTBIT_FLOAT64_LE     (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
 155 #define SNDRV_PCM_FMTBIT_FLOAT64_BE     (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
 156 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
 157 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
 158 #define SNDRV_PCM_FMTBIT_MU_LAW         (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
 159 #define SNDRV_PCM_FMTBIT_A_LAW          (1ULL << SNDRV_PCM_FORMAT_A_LAW)
 160 #define SNDRV_PCM_FMTBIT_IMA_ADPCM      (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
 161 #define SNDRV_PCM_FMTBIT_MPEG           (1ULL << SNDRV_PCM_FORMAT_MPEG)
 162 #define SNDRV_PCM_FMTBIT_GSM            (1ULL << SNDRV_PCM_FORMAT_GSM)
 163 #define SNDRV_PCM_FMTBIT_SPECIAL        (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
 164 #define SNDRV_PCM_FMTBIT_S24_3LE        (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
 165 #define SNDRV_PCM_FMTBIT_U24_3LE        (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
 166 #define SNDRV_PCM_FMTBIT_S24_3BE        (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
 167 #define SNDRV_PCM_FMTBIT_U24_3BE        (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
 168 #define SNDRV_PCM_FMTBIT_S20_3LE        (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
 169 #define SNDRV_PCM_FMTBIT_U20_3LE        (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
 170 #define SNDRV_PCM_FMTBIT_S20_3BE        (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
 171 #define SNDRV_PCM_FMTBIT_U20_3BE        (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
 172 #define SNDRV_PCM_FMTBIT_S18_3LE        (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
 173 #define SNDRV_PCM_FMTBIT_U18_3LE        (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
 174 #define SNDRV_PCM_FMTBIT_S18_3BE        (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
 175 #define SNDRV_PCM_FMTBIT_U18_3BE        (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
 176
 177 #ifdef SNDRV_LITTLE_ENDIAN
 178 #define SNDRV_PCM_FMTBIT_S16            SNDRV_PCM_FMTBIT_S16_LE
 179 #define SNDRV_PCM_FMTBIT_U16            SNDRV_PCM_FMTBIT_U16_LE
 180 #define SNDRV_PCM_FMTBIT_S24            SNDRV_PCM_FMTBIT_S24_LE
 181 #define SNDRV_PCM_FMTBIT_U24            SNDRV_PCM_FMTBIT_U24_LE
 182 #define SNDRV_PCM_FMTBIT_S32            SNDRV_PCM_FMTBIT_S32_LE
 183 #define SNDRV_PCM_FMTBIT_U32            SNDRV_PCM_FMTBIT_U32_LE
 184 #define SNDRV_PCM_FMTBIT_FLOAT          SNDRV_PCM_FMTBIT_FLOAT_LE
 185 #define SNDRV_PCM_FMTBIT_FLOAT64        SNDRV_PCM_FMTBIT_FLOAT64_LE
 186 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
 187 #endif
 188 #ifdef SNDRV_BIG_ENDIAN
 189 #define SNDRV_PCM_FMTBIT_S16            SNDRV_PCM_FMTBIT_S16_BE
 190 #define SNDRV_PCM_FMTBIT_U16            SNDRV_PCM_FMTBIT_U16_BE
 191 #define SNDRV_PCM_FMTBIT_S24            SNDRV_PCM_FMTBIT_S24_BE
 192 #define SNDRV_PCM_FMTBIT_U24            SNDRV_PCM_FMTBIT_U24_BE
 193 #define SNDRV_PCM_FMTBIT_S32            SNDRV_PCM_FMTBIT_S32_BE
 194 #define SNDRV_PCM_FMTBIT_U32            SNDRV_PCM_FMTBIT_U32_BE
 195 #define SNDRV_PCM_FMTBIT_FLOAT          SNDRV_PCM_FMTBIT_FLOAT_BE
 196 #define SNDRV_PCM_FMTBIT_FLOAT64        SNDRV_PCM_FMTBIT_FLOAT64_BE
 197 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
 198 #endif
 199
 200 struct snd_pcm_file {
 201         struct snd_pcm_substream *substream;
 202         int no_compat_mmap;
 203 };
 204
 205 struct snd_pcm_hw_rule;
 206 typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
 207                                       struct snd_pcm_hw_rule *rule);
 208
 209 struct snd_pcm_hw_rule {
 210         unsigned int cond;
 211         snd_pcm_hw_rule_func_t func;
 212         int var;
 213         int deps[4];
 214         void *private;
 215 };
 216
 217 struct snd_pcm_hw_constraints {
 218         struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
 219                          SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
 220         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
 221                              SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
 222         unsigned int rules_num;
 223         unsigned int rules_all;
 224         struct snd_pcm_hw_rule *rules;
 225 };
 226
 227 static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
 228                                             snd_pcm_hw_param_t var)
 229 {
 230         return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
 231 }
 232
 233 static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
 234                                                     snd_pcm_hw_param_t var)
 235 {
 236         return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
 237 }
 238
 239 struct snd_ratnum {
 240         unsigned int num;
 241         unsigned int den_min, den_max, den_step;
 242 };
 243
 244 struct snd_ratden {
 245         unsigned int num_min, num_max, num_step;
 246         unsigned int den;
 247 };
 248
 249 struct snd_pcm_hw_constraint_ratnums {
 250         int nrats;
 251         struct snd_ratnum *rats;
 252 };
 253
 254 struct snd_pcm_hw_constraint_ratdens {
 255         int nrats;
 256         struct snd_ratden *rats;
 257 };
 258
 259 struct snd_pcm_hw_constraint_list {
 260         unsigned int count;
 261         unsigned int *list;
 262         unsigned int mask;
 263 };
 264
 265 struct snd_pcm_runtime {
 266         /* -- Status -- */
 267         struct snd_pcm_substream *trigger_master;
 268         struct timespec trigger_tstamp; /* trigger timestamp */
 269         int overrange;
 270         snd_pcm_uframes_t avail_max;
 271         snd_pcm_uframes_t hw_ptr_base;  /* Position at buffer restart */
 272         snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
 273         unsigned long hw_ptr_jiffies;   /* Time when hw_ptr is updated */
 274         snd_pcm_sframes_t delay;        /* extra delay; typically FIFO size */
 275
 276         /* -- HW params -- */
 277         snd_pcm_access_t access;        /* access mode */
 278         snd_pcm_format_t format;        /* SNDRV_PCM_FORMAT_* */
 279         snd_pcm_subformat_t subformat;  /* subformat */
 280         unsigned int rate;              /* rate in Hz */
 281         unsigned int channels;          /* channels */
 282         snd_pcm_uframes_t period_size;  /* period size */
 283         unsigned int periods;           /* periods */
 284         snd_pcm_uframes_t buffer_size;  /* buffer size */
 285         snd_pcm_uframes_t min_align;    /* Min alignment for the format */
 286         size_t byte_align;
 287         unsigned int frame_bits;
 288         unsigned int sample_bits;
 289         unsigned int info;
 290         unsigned int rate_num;
 291         unsigned int rate_den;
 292
 293         /* -- SW params -- */
 294         int tstamp_mode;                /* mmap timestamp is updated */
 295         unsigned int period_step;
 296         snd_pcm_uframes_t start_threshold;
 297         snd_pcm_uframes_t stop_threshold;
 298         snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
 299                                                 noise is nearest than this */
 300         snd_pcm_uframes_t silence_size; /* Silence filling size */
 301         snd_pcm_uframes_t boundary;     /* pointers wrap point */
 302
 303         snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
 304         snd_pcm_uframes_t silence_filled; /* size filled with silence */
 305
 306         union snd_pcm_sync_id sync;     /* hardware synchronization ID */
 307
 308         /* -- mmap -- */
 309         struct snd_pcm_mmap_status *status;
 310         struct snd_pcm_mmap_control *control;
 311
 312         /* -- locking / scheduling -- */
 313         wait_queue_head_t sleep;
 314         struct fasync_struct *fasync;
 315
 316         /* -- private section -- */
 317         void *private_data;
 318         void (*private_free)(struct snd_pcm_runtime *runtime);
 319
 320         /* -- hardware description -- */
 321         struct snd_pcm_hardware hw;
 322         struct snd_pcm_hw_constraints hw_constraints;
 323
 324         /* -- interrupt callbacks -- */
 325         void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
 326         void (*transfer_ack_end)(struct snd_pcm_substream *substream);
 327
 328         /* -- timer -- */
 329         unsigned int timer_resolution;  /* timer resolution */
 330         int tstamp_type;                /* timestamp type */
 331
 332         /* -- DMA -- */
 333         unsigned char *dma_area;        /* DMA area */
 334         dma_addr_t dma_addr;            /* physical bus address (not accessible from main CPU) */
 335         size_t dma_bytes;               /* size of DMA area */
 336
 337         struct snd_dma_buffer *dma_buffer_p;    /* allocated buffer */
 338
 339 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 340         /* -- OSS things -- */
 341         struct snd_pcm_oss_runtime oss;
 342 #endif
 343 };
 344
 345 struct snd_pcm_group {          /* keep linked substreams */
 346         spinlock_t lock;
 347         struct list_head substreams;
 348         int count;
 349 };
 350
 351 struct snd_pcm_substream {
 352         struct snd_pcm *pcm;
 353         struct snd_pcm_str *pstr;
 354         void *private_data;             /* copied from pcm->private_data */
 355         int number;
 356         char name[32];                  /* substream name */
 357         int stream;                     /* stream (direction) */
 358         char latency_id[20];            /* latency identifier */
 359         size_t buffer_bytes_max;        /* limit ring buffer size */
 360         struct snd_dma_buffer dma_buffer;
 361         unsigned int dma_buf_id;
 362         size_t dma_max;
 363         /* -- hardware operations -- */
 364         struct snd_pcm_ops *ops;
 365         /* -- runtime information -- */
 366         struct snd_pcm_runtime *runtime;
 367         /* -- timer section -- */
 368         struct snd_timer *timer;                /* timer */
 369         unsigned timer_running: 1;      /* time is running */
 370         /* -- next substream -- */
 371         struct snd_pcm_substream *next;
 372         /* -- linked substreams -- */
 373         struct list_head link_list;     /* linked list member */
 374         struct snd_pcm_group self_group;        /* fake group for non linked substream (with substream lock inside) */
 375         struct snd_pcm_group *group;            /* pointer to current group */
 376         /* -- assigned files -- */
 377         void *file;
 378         int ref_count;
 379         atomic_t mmap_count;
 380         unsigned int f_flags;
 381         void (*pcm_release)(struct snd_pcm_substream *);
 382 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 383         /* -- OSS things -- */
 384         struct snd_pcm_oss_substream oss;
 385 #endif
 386 #ifdef CONFIG_SND_VERBOSE_PROCFS
 387         struct snd_info_entry *proc_root;
 388         struct snd_info_entry *proc_info_entry;
 389         struct snd_info_entry *proc_hw_params_entry;
 390         struct snd_info_entry *proc_sw_params_entry;
 391         struct snd_info_entry *proc_status_entry;
 392         struct snd_info_entry *proc_prealloc_entry;
 393         struct snd_info_entry *proc_prealloc_max_entry;
 394 #endif
 395         /* misc flags */
 396         unsigned int hw_opened: 1;
 397 };
 398
 399 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
 400
 401
 402 struct snd_pcm_str {
 403         int stream;                             /* stream (direction) */
 404         struct snd_pcm *pcm;
 405         /* -- substreams -- */
 406         unsigned int substream_count;
 407         unsigned int substream_opened;
 408         struct snd_pcm_substream *substream;
 409 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 410         /* -- OSS things -- */
 411         struct snd_pcm_oss_stream oss;
 412 #endif
 413 #ifdef CONFIG_SND_VERBOSE_PROCFS
 414         struct snd_info_entry *proc_root;
 415         struct snd_info_entry *proc_info_entry;
 416 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
 417         unsigned int xrun_debug;        /* 0 = disabled, 1 = verbose, 2 = stacktrace */
 418         struct snd_info_entry *proc_xrun_debug_entry;
 419 #endif
 420 #endif
 421 };
 422
 423 struct snd_pcm {
 424         struct snd_card *card;
 425         struct list_head list;
 426         int device; /* device number */
 427         unsigned int info_flags;
 428         unsigned short dev_class;
 429         unsigned short dev_subclass;
 430         char id[64];
 431         char name[80];
 432         struct snd_pcm_str streams[2];
 433         struct mutex open_mutex;
 434         wait_queue_head_t open_wait;
 435         void *private_data;
 436         void (*private_free) (struct snd_pcm *pcm);
 437         struct device *dev; /* actual hw device this belongs to */
 438 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 439         struct snd_pcm_oss oss;
 440 #endif
 441 };
 442
 443 struct snd_pcm_notify {
 444         int (*n_register) (struct snd_pcm * pcm);
 445         int (*n_disconnect) (struct snd_pcm * pcm);
 446         int (*n_unregister) (struct snd_pcm * pcm);
 447         struct list_head list;
 448 };
 449
 450 /*
 451  *  Registering
 452  */
 453
 454 extern const struct file_operations snd_pcm_f_ops[2];
 455
 456 int snd_pcm_new(struct snd_card *card, const char *id, int device,
 457                 int playback_count, int capture_count,
 458                 struct snd_pcm **rpcm);
 459 int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
 460
 461 int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
 462
 463 /*
 464  *  Native I/O
 465  */
 466
 467 extern rwlock_t snd_pcm_link_rwlock;
 468
 469 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
 470 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 471                       struct snd_pcm_info __user *info);
 472 int snd_pcm_status(struct snd_pcm_substream *substream,
 473                    struct snd_pcm_status *status);
 474 int snd_pcm_start(struct snd_pcm_substream *substream);
 475 int snd_pcm_stop(struct snd_pcm_substream *substream, int status);
 476 int snd_pcm_drain_done(struct snd_pcm_substream *substream);
 477 #ifdef CONFIG_PM
 478 int snd_pcm_suspend(struct snd_pcm_substream *substream);
 479 int snd_pcm_suspend_all(struct snd_pcm *pcm);
 480 #endif
 481 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
 482 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
 483                            struct snd_pcm_substream **rsubstream);
 484 void snd_pcm_release_substream(struct snd_pcm_substream *substream);
 485 int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
 486                              struct snd_pcm_substream **rsubstream);
 487 void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
 488 void snd_pcm_vma_notify_data(void *client, void *data);
 489 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
 490
 491 #if BITS_PER_LONG >= 64
 492
 493 static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
 494 {
 495         *rem = *n % div;
 496         *n /= div;
 497 }
 498
 499 #elif defined(i386)
 500
 501 static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
 502 {
 503         u_int32_t low, high;
 504         low = *n & 0xffffffff;
 505         high = *n >> 32;
 506         if (high) {
 507                 u_int32_t high1 = high % div;
 508                 high /= div;
 509                 asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
 510                 *n = (u_int64_t)high << 32 | low;
 511         } else {
 512                 *n = low / div;
 513                 *rem = low % div;
 514         }
 515 }
 516 #else
 517
 518 static inline void divl(u_int32_t high, u_int32_t low,
 519                         u_int32_t div,
 520                         u_int32_t *q, u_int32_t *r)
 521 {
 522         u_int64_t n = (u_int64_t)high << 32 | low;
 523         u_int64_t d = (u_int64_t)div << 31;
 524         u_int32_t q1 = 0;
 525         int c = 32;
 526         while (n > 0xffffffffU) {
 527                 q1 <<= 1;
 528                 if (n >= d) {
 529                         n -= d;
 530                         q1 |= 1;
 531                 }
 532                 d >>= 1;
 533                 c--;
 534         }
 535         q1 <<= c;
 536         if (n) {
 537                 low = n;
 538                 *q = q1 | (low / div);
 539                 *r = low % div;
 540         } else {
 541                 *r = 0;
 542                 *q = q1;
 543         }
 544         return;
 545 }
 546
 547 static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
 548 {
 549         u_int32_t low, high;
 550         low = *n & 0xffffffff;
 551         high = *n >> 32;
 552         if (high) {
 553                 u_int32_t high1 = high % div;
 554                 u_int32_t low1 = low;
 555                 high /= div;
 556                 divl(high1, low1, div, &low, rem);
 557                 *n = (u_int64_t)high << 32 | low;
 558         } else {
 559                 *n = low / div;
 560                 *rem = low % div;
 561         }
 562 }
 563 #endif
 564
 565 /*
 566  *  PCM library
 567  */
 568
 569 static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
 570 {
 571         return substream->group != &substream->self_group;
 572 }
 573
 574 static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
 575 {
 576         read_lock(&snd_pcm_link_rwlock);
 577         spin_lock(&substream->self_group.lock);
 578 }
 579
 580 static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
 581 {
 582         spin_unlock(&substream->self_group.lock);
 583         read_unlock(&snd_pcm_link_rwlock);
 584 }
 585
 586 static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
 587 {
 588         read_lock_irq(&snd_pcm_link_rwlock);
 589         spin_lock(&substream->self_group.lock);
 590 }
 591
 592 static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
 593 {
 594         spin_unlock(&substream->self_group.lock);
 595         read_unlock_irq(&snd_pcm_link_rwlock);
 596 }
 597
 598 #define snd_pcm_stream_lock_irqsave(substream, flags) \
 599 do { \
 600         read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
 601         spin_lock(&substream->self_group.lock); \
 602 } while (0)
 603
 604 #define snd_pcm_stream_unlock_irqrestore(substream, flags) \
 605 do { \
 606         spin_unlock(&substream->self_group.lock); \
 607         read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
 608 } while (0)
 609
 610 #define snd_pcm_group_for_each_entry(s, substream) \
 611         list_for_each_entry(s, &substream->group->substreams, link_list)
 612
 613 static inline int snd_pcm_running(struct snd_pcm_substream *substream)
 614 {
 615         return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 616                 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
 617                  substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
 618 }
 619
 620 static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
 621 {
 622         return size * 8 / runtime->sample_bits;
 623 }
 624
 625 static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
 626 {
 627         return size * 8 / runtime->frame_bits;
 628 }
 629
 630 static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
 631 {
 632         return size * runtime->sample_bits / 8;
 633 }
 634
 635 static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
 636 {
 637         return size * runtime->frame_bits / 8;
 638 }
 639
 640 static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
 641 {
 642         return bytes % runtime->byte_align == 0;
 643 }
 644
 645 static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
 646 {
 647         struct snd_pcm_runtime *runtime = substream->runtime;
 648         return frames_to_bytes(runtime, runtime->buffer_size);
 649 }
 650
 651 static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
 652 {
 653         struct snd_pcm_runtime *runtime = substream->runtime;
 654         return frames_to_bytes(runtime, runtime->period_size);
 655 }
 656
 657 /*
 658  *  result is: 0 ... (boundary - 1)
 659  */
 660 static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
 661 {
 662         snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
 663         if (avail < 0)
 664                 avail += runtime->boundary;
 665         else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
 666                 avail -= runtime->boundary;
 667         return avail;
 668 }
 669
 670 /*
 671  *  result is: 0 ... (boundary - 1)
 672  */
 673 static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
 674 {
 675         snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
 676         if (avail < 0)
 677                 avail += runtime->boundary;
 678         return avail;
 679 }
 680
 681 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
 682 {
 683         return runtime->buffer_size - snd_pcm_playback_avail(runtime);
 684 }
 685
 686 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
 687 {
 688         return runtime->buffer_size - snd_pcm_capture_avail(runtime);
 689 }
 690
 691 /**
 692  * snd_pcm_playback_ready - check whether the playback buffer is available
 693  * @substream: the pcm substream instance
 694  *
 695  * Checks whether enough free space is available on the playback buffer.
 696  *
 697  * Returns non-zero if available, or zero if not.
 698  */
 699 static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
 700 {
 701         struct snd_pcm_runtime *runtime = substream->runtime;
 702         return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
 703 }
 704
 705 /**
 706  * snd_pcm_capture_ready - check whether the capture buffer is available
 707  * @substream: the pcm substream instance
 708  *
 709  * Checks whether enough capture data is available on the capture buffer.
 710  *
 711  * Returns non-zero if available, or zero if not.
 712  */
 713 static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
 714 {
 715         struct snd_pcm_runtime *runtime = substream->runtime;
 716         return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
 717 }
 718
 719 /**
 720  * snd_pcm_playback_data - check whether any data exists on the playback buffer
 721  * @substream: the pcm substream instance
 722  *
 723  * Checks whether any data exists on the playback buffer. If stop_threshold
 724  * is bigger or equal to boundary, then this function returns always non-zero.
 725  *
 726  * Returns non-zero if exists, or zero if not.
 727  */
 728 static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
 729 {
 730         struct snd_pcm_runtime *runtime = substream->runtime;
 731
 732         if (runtime->stop_threshold >= runtime->boundary)
 733                 return 1;
 734         return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
 735 }
 736
 737 /**
 738  * snd_pcm_playback_empty - check whether the playback buffer is empty
 739  * @substream: the pcm substream instance
 740  *
 741  * Checks whether the playback buffer is empty.
 742  *
 743  * Returns non-zero if empty, or zero if not.
 744  */
 745 static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
 746 {
 747         struct snd_pcm_runtime *runtime = substream->runtime;
 748         return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
 749 }
 750
 751 /**
 752  * snd_pcm_capture_empty - check whether the capture buffer is empty
 753  * @substream: the pcm substream instance
 754  *
 755  * Checks whether the capture buffer is empty.
 756  *
 757  * Returns non-zero if empty, or zero if not.
 758  */
 759 static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
 760 {
 761         struct snd_pcm_runtime *runtime = substream->runtime;
 762         return snd_pcm_capture_avail(runtime) == 0;
 763 }
 764
 765 static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
 766                                         struct snd_pcm_substream *master)
 767 {
 768         substream->runtime->trigger_master = master;
 769 }
 770
 771 static inline int hw_is_mask(int var)
 772 {
 773         return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
 774                 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
 775 }
 776
 777 static inline int hw_is_interval(int var)
 778 {
 779         return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
 780                 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
 781 }
 782
 783 static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
 784                                      snd_pcm_hw_param_t var)
 785 {
 786         return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
 787 }
 788
 789 static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
 790                                              snd_pcm_hw_param_t var)
 791 {
 792         return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
 793 }
 794
 795 static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
 796                                              snd_pcm_hw_param_t var)
 797 {
 798         return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
 799 }
 800
 801 static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
 802                                                      snd_pcm_hw_param_t var)
 803 {
 804         return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
 805 }
 806
 807 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
 808 #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
 809 #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
 810 #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
 811 #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
 812 #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
 813 #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
 814 #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
 815 #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
 816 #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
 817
 818
 819 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
 820 void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
 821 void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
 822 void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
 823                           unsigned int k, struct snd_interval *c);
 824 void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
 825                           const struct snd_interval *b, struct snd_interval *c);
 826 int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask);
 827 int snd_interval_ratnum(struct snd_interval *i,
 828                         unsigned int rats_count, struct snd_ratnum *rats,
 829                         unsigned int *nump, unsigned int *denp);
 830
 831 void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
 832 void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
 833 int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
 834
 835 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
 836
 837 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
 838 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
 839
 840 int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
 841                                u_int32_t mask);
 842 int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
 843                                  u_int64_t mask);
 844 int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
 845                                  unsigned int min, unsigned int max);
 846 int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
 847 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
 848                                unsigned int cond,
 849                                snd_pcm_hw_param_t var,
 850                                struct snd_pcm_hw_constraint_list *l);
 851 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
 852                                   unsigned int cond,
 853                                   snd_pcm_hw_param_t var,
 854                                   struct snd_pcm_hw_constraint_ratnums *r);
 855 int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
 856                                   unsigned int cond,
 857                                   snd_pcm_hw_param_t var,
 858                                   struct snd_pcm_hw_constraint_ratdens *r);
 859 int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
 860                                  unsigned int cond,
 861                                  unsigned int width,
 862                                  unsigned int msbits);
 863 int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
 864                                unsigned int cond,
 865                                snd_pcm_hw_param_t var,
 866                                unsigned long step);
 867 int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
 868                                unsigned int cond,
 869                                snd_pcm_hw_param_t var);
 870 int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
 871                         unsigned int cond,
 872                         int var,
 873                         snd_pcm_hw_rule_func_t func, void *private,
 874                         int dep, ...);
 875
 876 int snd_pcm_format_signed(snd_pcm_format_t format);
 877 int snd_pcm_format_unsigned(snd_pcm_format_t format);
 878 int snd_pcm_format_linear(snd_pcm_format_t format);
 879 int snd_pcm_format_little_endian(snd_pcm_format_t format);
 880 int snd_pcm_format_big_endian(snd_pcm_format_t format);
 881 #if 0 /* just for DocBook */
 882 /**
 883  * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
 884  * @format: the format to check
 885  *
 886  * Returns 1 if the given PCM format is CPU-endian, 0 if
 887  * opposite, or a negative error code if endian not specified.
 888  */
 889 int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
 890 #endif /* DocBook */
 891 #ifdef SNDRV_LITTLE_ENDIAN
 892 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
 893 #else
 894 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
 895 #endif
 896 int snd_pcm_format_width(snd_pcm_format_t format);                      /* in bits */
 897 int snd_pcm_format_physical_width(snd_pcm_format_t format);             /* in bits */
 898 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
 899 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
 900 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
 901 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
 902
 903 void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
 904 void snd_pcm_set_sync(struct snd_pcm_substream *substream);
 905 int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
 906 int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
 907                       unsigned int cmd, void *arg);
 908 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
 909 int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
 910 int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
 911 int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
 912 int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
 913 void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
 914 void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
 915 snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
 916                                     const void __user *buf,
 917                                     snd_pcm_uframes_t frames);
 918 snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
 919                                    void __user *buf, snd_pcm_uframes_t frames);
 920 snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
 921                                      void __user **bufs, snd_pcm_uframes_t frames);
 922 snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
 923                                     void __user **bufs, snd_pcm_uframes_t frames);
 924
 925 extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
 926
 927 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
 928 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
 929
 930 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
 931                                               struct snd_dma_buffer *bufp)
 932 {
 933         struct snd_pcm_runtime *runtime = substream->runtime;
 934         if (bufp) {
 935                 runtime->dma_buffer_p = bufp;
 936                 runtime->dma_area = bufp->area;
 937                 runtime->dma_addr = bufp->addr;
 938                 runtime->dma_bytes = bufp->bytes;
 939         } else {
 940                 runtime->dma_buffer_p = NULL;
 941                 runtime->dma_area = NULL;
 942                 runtime->dma_addr = 0;
 943                 runtime->dma_bytes = 0;
 944         }
 945 }
 946
 947 /*
 948  *  Timer interface
 949  */
 950
 951 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
 952 void snd_pcm_timer_init(struct snd_pcm_substream *substream);
 953 void snd_pcm_timer_done(struct snd_pcm_substream *substream);
 954
 955 static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
 956                                    struct timespec *tv)
 957 {
 958         if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
 959                 do_posix_clock_monotonic_gettime(tv);
 960         else
 961                 getnstimeofday(tv);
 962 }
 963
 964 /*
 965  *  Memory
 966  */
 967
 968 int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
 969 int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
 970 int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
 971                                   int type, struct device *data,
 972                                   size_t size, size_t max);
 973 int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
 974                                           int type, void *data,
 975                                           size_t size, size_t max);
 976 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
 977 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
 978
 979 /*
 980  * SG-buffer handling
 981  */
 982 #define snd_pcm_substream_sgbuf(substream) \
 983         ((substream)->runtime->dma_buffer_p->private_data)
 984
 985 static inline dma_addr_t
 986 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
 987 {
 988         struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
 989         return snd_sgbuf_get_addr(sg, ofs);
 990 }
 991
 992 static inline void *
 993 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
 994 {
 995         struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
 996         return snd_sgbuf_get_ptr(sg, ofs);
 997 }
 998
 999 struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
1000                                     unsigned long offset);
1001 unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
1002                                           unsigned int ofs, unsigned int size);
1003
1004 /* handle mmap counter - PCM mmap callback should handle this counter properly */
1005 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1006 {
1007         struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1008         atomic_inc(&substream->mmap_count);
1009 }
1010
1011 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1012 {
1013         struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1014         atomic_dec(&substream->mmap_count);
1015 }
1016
1017 /* mmap for io-memory area */
1018 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1019 #define SNDRV_PCM_INFO_MMAP_IOMEM       SNDRV_PCM_INFO_MMAP
1020 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1021 #else
1022 #define SNDRV_PCM_INFO_MMAP_IOMEM       0
1023 #define snd_pcm_lib_mmap_iomem  NULL
1024 #endif
1025
1026 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1027 {
1028         *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1029 }
1030
1031 /*
1032  *  Misc
1033  */
1034
1035 #define SNDRV_PCM_DEFAULT_CON_SPDIF     (IEC958_AES0_CON_EMPHASIS_NONE|\
1036                                          (IEC958_AES1_CON_ORIGINAL<<8)|\
1037                                          (IEC958_AES1_CON_PCM_CODER<<8)|\
1038                                          (IEC958_AES3_CON_FS_48000<<24))
1039
1040 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1041
1042 #endif /* __SOUND_PCM_H */