include/sound/asound.h

   1 /*
   2  *  Advanced Linux Sound Architecture - ALSA - Driver
   3  *  Copyright (c) 1994-2003 by Jaroslav Kysela <perex@suse.cz>,
   4  *                             Abramo Bagnara <abramo@alsa-project.org>
   5  *
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License as published by
   9  *   the Free Software Foundation; either version 2 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  *
  21  */
  22
  23 #ifndef __SOUND_ASOUND_H
  24 #define __SOUND_ASOUND_H
  25
  26 #if defined(LINUX) || defined(__LINUX__) || defined(__linux__)
  27
  28 #include <linux/ioctl.h>
  29
  30 #ifdef __KERNEL__
  31
  32 #include <linux/types.h>
  33 #include <linux/time.h>
  34 #include <asm/byteorder.h>
  35
  36 #if  __LITTLE_ENDIAN == 1234
  37 #define SNDRV_LITTLE_ENDIAN
  38 #elif __BIG_ENDIAN == 4321
  39 #define SNDRV_BIG_ENDIAN
  40 #else
  41 #error "Unsupported endian..."
  42 #endif
  43
  44 #else /* !__KERNEL__ */
  45
  46 #include <endian.h>
  47 #if __BYTE_ORDER == __LITTLE_ENDIAN
  48 #define SNDRV_LITTLE_ENDIAN
  49 #elif __BYTE_ORDER == __BIG_ENDIAN
  50 #define SNDRV_BIG_ENDIAN
  51 #else
  52 #error "Unsupported endian..."
  53 #endif
  54
  55 #endif /* __KERNEL **/
  56
  57 #endif /* LINUX */
  58
  59 #ifndef __KERNEL__
  60 #include <sys/time.h>
  61 #include <sys/types.h>
  62 #endif
  63
  64 /*
  65  *  protocol version
  66  */
  67
  68 #define SNDRV_PROTOCOL_VERSION(major, minor, subminor) (((major)<<16)|((minor)<<8)|(subminor))
  69 #define SNDRV_PROTOCOL_MAJOR(version) (((version)>>16)&0xffff)
  70 #define SNDRV_PROTOCOL_MINOR(version) (((version)>>8)&0xff)
  71 #define SNDRV_PROTOCOL_MICRO(version) ((version)&0xff)
  72 #define SNDRV_PROTOCOL_INCOMPATIBLE(kversion, uversion) \
  73         (SNDRV_PROTOCOL_MAJOR(kversion) != SNDRV_PROTOCOL_MAJOR(uversion) || \
  74          (SNDRV_PROTOCOL_MAJOR(kversion) == SNDRV_PROTOCOL_MAJOR(uversion) && \
  75            SNDRV_PROTOCOL_MINOR(kversion) != SNDRV_PROTOCOL_MINOR(uversion)))
  76
  77 /****************************************************************************
  78  *                                                                          *
  79  *        Digital audio interface                                           *
  80  *                                                                          *
  81  ****************************************************************************/
  82
  83 struct sndrv_aes_iec958 {
  84         unsigned char status[24];       /* AES/IEC958 channel status bits */
  85         unsigned char subcode[147];     /* AES/IEC958 subcode bits */
  86         unsigned char pad;              /* nothing */
  87         unsigned char dig_subframe[4];  /* AES/IEC958 subframe bits */
  88 };
  89
  90 /****************************************************************************
  91  *                                                                          *
  92  *      Section for driver hardware dependent interface - /dev/snd/hw?      *
  93  *                                                                          *
  94  ****************************************************************************/
  95
  96 #define SNDRV_HWDEP_VERSION             SNDRV_PROTOCOL_VERSION(1, 0, 1)
  97
  98 enum sndrv_hwdep_iface {
  99         SNDRV_HWDEP_IFACE_OPL2 = 0,
 100         SNDRV_HWDEP_IFACE_OPL3,
 101         SNDRV_HWDEP_IFACE_OPL4,
 102         SNDRV_HWDEP_IFACE_SB16CSP,      /* Creative Signal Processor */
 103         SNDRV_HWDEP_IFACE_EMU10K1,      /* FX8010 processor in EMU10K1 chip */
 104         SNDRV_HWDEP_IFACE_YSS225,       /* Yamaha FX processor */
 105         SNDRV_HWDEP_IFACE_ICS2115,      /* Wavetable synth */
 106         SNDRV_HWDEP_IFACE_SSCAPE,       /* Ensoniq SoundScape ISA card (MC68EC000) */
 107         SNDRV_HWDEP_IFACE_VX,           /* Digigram VX cards */
 108
 109         /* Don't forget to change the following: */
 110         SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_VX,
 111 };
 112
 113 struct sndrv_hwdep_info {
 114         unsigned int device;            /* WR: device number */
 115         int card;                       /* R: card number */
 116         unsigned char id[64];           /* ID (user selectable) */
 117         unsigned char name[80];         /* hwdep name */
 118         enum sndrv_hwdep_iface iface;   /* hwdep interface */
 119         unsigned char reserved[64];     /* reserved for future */
 120 };
 121
 122 /* generic DSP loader */
 123 struct sndrv_hwdep_dsp_status {
 124         unsigned int version;           /* R: driver-specific version */
 125         unsigned char id[32];           /* R: driver-specific ID string */
 126         unsigned int num_dsps;          /* R: number of DSP images to transfer */
 127         unsigned int dsp_loaded;        /* R: bit flags indicating the loaded DSPs */
 128         unsigned int chip_ready;        /* R: 1 = initialization finished */
 129         unsigned char reserved[16];     /* reserved for future use */
 130 };
 131
 132 struct sndrv_hwdep_dsp_image {
 133         unsigned int index;             /* W: DSP index */
 134         unsigned char name[64];         /* W: ID (e.g. file name) */
 135         unsigned char *image;           /* W: binary image */
 136         size_t length;                  /* W: size of image in bytes */
 137         unsigned long driver_data;      /* W: driver-specific data */
 138 };
 139
 140 enum {
 141         SNDRV_HWDEP_IOCTL_PVERSION = _IOR ('H', 0x00, int),
 142         SNDRV_HWDEP_IOCTL_INFO = _IOR ('H', 0x01, struct sndrv_hwdep_info),
 143         SNDRV_HWDEP_IOCTL_DSP_STATUS = _IOR('H', 0x02, struct sndrv_hwdep_dsp_status),
 144         SNDRV_HWDEP_IOCTL_DSP_LOAD   = _IOW('H', 0x03, struct sndrv_hwdep_dsp_image)
 145 };
 146
 147 /*****************************************************************************
 148  *                                                                           *
 149  *             Digital Audio (PCM) interface - /dev/snd/pcm??                *
 150  *                                                                           *
 151  *****************************************************************************/
 152
 153 #define SNDRV_PCM_VERSION               SNDRV_PROTOCOL_VERSION(2, 0, 5)
 154
 155 typedef unsigned long sndrv_pcm_uframes_t;
 156 typedef long sndrv_pcm_sframes_t;
 157
 158 enum sndrv_pcm_class {
 159         SNDRV_PCM_CLASS_GENERIC = 0,    /* standard mono or stereo device */
 160         SNDRV_PCM_CLASS_MULTI,          /* multichannel device */
 161         SNDRV_PCM_CLASS_MODEM,          /* software modem class */
 162         SNDRV_PCM_CLASS_DIGITIZER,      /* digitizer class */
 163         /* Don't forget to change the following: */
 164         SNDRV_PCM_CLASS_LAST = SNDRV_PCM_CLASS_DIGITIZER,
 165 };
 166
 167 enum sndrv_pcm_subclass {
 168         SNDRV_PCM_SUBCLASS_GENERIC_MIX = 0, /* mono or stereo subdevices are mixed together */
 169         SNDRV_PCM_SUBCLASS_MULTI_MIX,   /* multichannel subdevices are mixed together */
 170         /* Don't forget to change the following: */
 171         SNDRV_PCM_SUBCLASS_LAST = SNDRV_PCM_SUBCLASS_MULTI_MIX,
 172 };
 173
 174 enum sndrv_pcm_stream {
 175         SNDRV_PCM_STREAM_PLAYBACK = 0,
 176         SNDRV_PCM_STREAM_CAPTURE,
 177         SNDRV_PCM_STREAM_LAST = SNDRV_PCM_STREAM_CAPTURE,
 178 };
 179
 180 enum sndrv_pcm_access {
 181         SNDRV_PCM_ACCESS_MMAP_INTERLEAVED = 0,  /* interleaved mmap */
 182         SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED,   /* noninterleaved mmap */
 183         SNDRV_PCM_ACCESS_MMAP_COMPLEX,          /* complex mmap */
 184         SNDRV_PCM_ACCESS_RW_INTERLEAVED,        /* readi/writei */
 185         SNDRV_PCM_ACCESS_RW_NONINTERLEAVED,     /* readn/writen */
 186         SNDRV_PCM_ACCESS_LAST = SNDRV_PCM_ACCESS_RW_NONINTERLEAVED,
 187 };
 188
 189 enum sndrv_pcm_format {
 190         SNDRV_PCM_FORMAT_S8 = 0,
 191         SNDRV_PCM_FORMAT_U8,
 192         SNDRV_PCM_FORMAT_S16_LE,
 193         SNDRV_PCM_FORMAT_S16_BE,
 194         SNDRV_PCM_FORMAT_U16_LE,
 195         SNDRV_PCM_FORMAT_U16_BE,
 196         SNDRV_PCM_FORMAT_S24_LE,        /* low three bytes */
 197         SNDRV_PCM_FORMAT_S24_BE,        /* low three bytes */
 198         SNDRV_PCM_FORMAT_U24_LE,        /* low three bytes */
 199         SNDRV_PCM_FORMAT_U24_BE,        /* low three bytes */
 200         SNDRV_PCM_FORMAT_S32_LE,
 201         SNDRV_PCM_FORMAT_S32_BE,
 202         SNDRV_PCM_FORMAT_U32_LE,
 203         SNDRV_PCM_FORMAT_U32_BE,
 204         SNDRV_PCM_FORMAT_FLOAT_LE,      /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
 205         SNDRV_PCM_FORMAT_FLOAT_BE,      /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
 206         SNDRV_PCM_FORMAT_FLOAT64_LE,    /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
 207         SNDRV_PCM_FORMAT_FLOAT64_BE,    /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
 208         SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE,    /* IEC-958 subframe, Little Endian */
 209         SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE,    /* IEC-958 subframe, Big Endian */
 210         SNDRV_PCM_FORMAT_MU_LAW,
 211         SNDRV_PCM_FORMAT_A_LAW,
 212         SNDRV_PCM_FORMAT_IMA_ADPCM,
 213         SNDRV_PCM_FORMAT_MPEG,
 214         SNDRV_PCM_FORMAT_GSM,
 215         SNDRV_PCM_FORMAT_SPECIAL = 31,
 216         SNDRV_PCM_FORMAT_S24_3LE = 32,  /* in three bytes */
 217         SNDRV_PCM_FORMAT_S24_3BE,       /* in three bytes */
 218         SNDRV_PCM_FORMAT_U24_3LE,       /* in three bytes */
 219         SNDRV_PCM_FORMAT_U24_3BE,       /* in three bytes */
 220         SNDRV_PCM_FORMAT_S20_3LE,       /* in three bytes */
 221         SNDRV_PCM_FORMAT_S20_3BE,       /* in three bytes */
 222         SNDRV_PCM_FORMAT_U20_3LE,       /* in three bytes */
 223         SNDRV_PCM_FORMAT_U20_3BE,       /* in three bytes */
 224         SNDRV_PCM_FORMAT_S18_3LE,       /* in three bytes */
 225         SNDRV_PCM_FORMAT_S18_3BE,       /* in three bytes */
 226         SNDRV_PCM_FORMAT_U18_3LE,       /* in three bytes */
 227         SNDRV_PCM_FORMAT_U18_3BE,       /* in three bytes */
 228         SNDRV_PCM_FORMAT_LAST = SNDRV_PCM_FORMAT_U18_3BE,
 229
 230 #ifdef SNDRV_LITTLE_ENDIAN
 231         SNDRV_PCM_FORMAT_S16 = SNDRV_PCM_FORMAT_S16_LE,
 232         SNDRV_PCM_FORMAT_U16 = SNDRV_PCM_FORMAT_U16_LE,
 233         SNDRV_PCM_FORMAT_S24 = SNDRV_PCM_FORMAT_S24_LE,
 234         SNDRV_PCM_FORMAT_U24 = SNDRV_PCM_FORMAT_U24_LE,
 235         SNDRV_PCM_FORMAT_S32 = SNDRV_PCM_FORMAT_S32_LE,
 236         SNDRV_PCM_FORMAT_U32 = SNDRV_PCM_FORMAT_U32_LE,
 237         SNDRV_PCM_FORMAT_FLOAT = SNDRV_PCM_FORMAT_FLOAT_LE,
 238         SNDRV_PCM_FORMAT_FLOAT64 = SNDRV_PCM_FORMAT_FLOAT64_LE,
 239         SNDRV_PCM_FORMAT_IEC958_SUBFRAME = SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE,
 240 #endif
 241 #ifdef SNDRV_BIG_ENDIAN
 242         SNDRV_PCM_FORMAT_S16 = SNDRV_PCM_FORMAT_S16_BE,
 243         SNDRV_PCM_FORMAT_U16 = SNDRV_PCM_FORMAT_U16_BE,
 244         SNDRV_PCM_FORMAT_S24 = SNDRV_PCM_FORMAT_S24_BE,
 245         SNDRV_PCM_FORMAT_U24 = SNDRV_PCM_FORMAT_U24_BE,
 246         SNDRV_PCM_FORMAT_S32 = SNDRV_PCM_FORMAT_S32_BE,
 247         SNDRV_PCM_FORMAT_U32 = SNDRV_PCM_FORMAT_U32_BE,
 248         SNDRV_PCM_FORMAT_FLOAT = SNDRV_PCM_FORMAT_FLOAT_BE,
 249         SNDRV_PCM_FORMAT_FLOAT64 = SNDRV_PCM_FORMAT_FLOAT64_BE,
 250         SNDRV_PCM_FORMAT_IEC958_SUBFRAME = SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE,
 251 #endif
 252 };
 253
 254 enum sndrv_pcm_subformat {
 255         SNDRV_PCM_SUBFORMAT_STD = 0,
 256         SNDRV_PCM_SUBFORMAT_LAST = SNDRV_PCM_SUBFORMAT_STD,
 257 };
 258
 259 #define SNDRV_PCM_INFO_MMAP             0x00000001      /* hardware supports mmap */
 260 #define SNDRV_PCM_INFO_MMAP_VALID       0x00000002      /* period data are valid during transfer */
 261 #define SNDRV_PCM_INFO_DOUBLE           0x00000004      /* Double buffering needed for PCM start/stop */
 262 #define SNDRV_PCM_INFO_BATCH            0x00000010      /* double buffering */
 263 #define SNDRV_PCM_INFO_INTERLEAVED      0x00000100      /* channels are interleaved */
 264 #define SNDRV_PCM_INFO_NONINTERLEAVED   0x00000200      /* channels are not interleaved */
 265 #define SNDRV_PCM_INFO_COMPLEX          0x00000400      /* complex frame organization (mmap only) */
 266 #define SNDRV_PCM_INFO_BLOCK_TRANSFER   0x00010000      /* hardware transfer block of samples */
 267 #define SNDRV_PCM_INFO_OVERRANGE        0x00020000      /* hardware supports ADC (capture) overrange detection */
 268 #define SNDRV_PCM_INFO_RESUME           0x00040000      /* hardware supports stream resume after suspend */
 269 #define SNDRV_PCM_INFO_PAUSE            0x00080000      /* pause ioctl is supported */
 270 #define SNDRV_PCM_INFO_HALF_DUPLEX      0x00100000      /* only half duplex */
 271 #define SNDRV_PCM_INFO_JOINT_DUPLEX     0x00200000      /* playback and capture stream are somewhat correlated */
 272 #define SNDRV_PCM_INFO_SYNC_START       0x00400000      /* pcm support some kind of sync go */
 273
 274 enum sndrv_pcm_state {
 275         SNDRV_PCM_STATE_OPEN = 0,       /* stream is open */
 276         SNDRV_PCM_STATE_SETUP,          /* stream has a setup */
 277         SNDRV_PCM_STATE_PREPARED,       /* stream is ready to start */
 278         SNDRV_PCM_STATE_RUNNING,        /* stream is running */
 279         SNDRV_PCM_STATE_XRUN,           /* stream reached an xrun */
 280         SNDRV_PCM_STATE_DRAINING,       /* stream is draining */
 281         SNDRV_PCM_STATE_PAUSED,         /* stream is paused */
 282         SNDRV_PCM_STATE_SUSPENDED,      /* hardware is suspended */
 283         SNDRV_PCM_STATE_LAST = SNDRV_PCM_STATE_SUSPENDED,
 284 };
 285
 286 enum {
 287         SNDRV_PCM_MMAP_OFFSET_DATA = 0x00000000,
 288         SNDRV_PCM_MMAP_OFFSET_STATUS = 0x80000000,
 289         SNDRV_PCM_MMAP_OFFSET_CONTROL = 0x81000000,
 290 };
 291
 292 union sndrv_pcm_sync_id {
 293         unsigned char id[16];
 294         unsigned short id16[8];
 295         unsigned int id32[4];
 296 };
 297
 298 struct sndrv_pcm_info {
 299         unsigned int device;            /* RO/WR (control): device number */
 300         unsigned int subdevice;         /* RO/WR (control): subdevice number */
 301         enum sndrv_pcm_stream stream;   /* RO/WR (control): stream number */
 302         int card;                       /* R: card number */
 303         unsigned char id[64];           /* ID (user selectable) */
 304         unsigned char name[80];         /* name of this device */
 305         unsigned char subname[32];      /* subdevice name */
 306         enum sndrv_pcm_class dev_class; /* SNDRV_PCM_CLASS_* */
 307         enum sndrv_pcm_subclass dev_subclass; /* SNDRV_PCM_SUBCLASS_* */
 308         unsigned int subdevices_count;
 309         unsigned int subdevices_avail;
 310         union sndrv_pcm_sync_id sync;   /* hardware synchronization ID */
 311         unsigned char reserved[64];     /* reserved for future... */
 312 };
 313
 314 enum sndrv_pcm_hw_param {
 315         SNDRV_PCM_HW_PARAM_ACCESS = 0,  /* Access type */
 316         SNDRV_PCM_HW_PARAM_FIRST_MASK = SNDRV_PCM_HW_PARAM_ACCESS,
 317         SNDRV_PCM_HW_PARAM_FORMAT,      /* Format */
 318         SNDRV_PCM_HW_PARAM_SUBFORMAT,   /* Subformat */
 319         SNDRV_PCM_HW_PARAM_LAST_MASK = SNDRV_PCM_HW_PARAM_SUBFORMAT,
 320
 321         SNDRV_PCM_HW_PARAM_SAMPLE_BITS = 8, /* Bits per sample */
 322         SNDRV_PCM_HW_PARAM_FIRST_INTERVAL = SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 323         SNDRV_PCM_HW_PARAM_FRAME_BITS,  /* Bits per frame */
 324         SNDRV_PCM_HW_PARAM_CHANNELS,    /* Channels */
 325         SNDRV_PCM_HW_PARAM_RATE,        /* Approx rate */
 326         SNDRV_PCM_HW_PARAM_PERIOD_TIME, /* Approx distance between interrupts
 327                                            in us */
 328         SNDRV_PCM_HW_PARAM_PERIOD_SIZE, /* Approx frames between interrupts */
 329         SNDRV_PCM_HW_PARAM_PERIOD_BYTES, /* Approx bytes between interrupts */
 330         SNDRV_PCM_HW_PARAM_PERIODS,     /* Approx interrupts per buffer */
 331         SNDRV_PCM_HW_PARAM_BUFFER_TIME, /* Approx duration of buffer in us */
 332         SNDRV_PCM_HW_PARAM_BUFFER_SIZE, /* Size of buffer in frames */
 333         SNDRV_PCM_HW_PARAM_BUFFER_BYTES, /* Size of buffer in bytes */
 334         SNDRV_PCM_HW_PARAM_TICK_TIME,   /* Approx tick duration in us */
 335         SNDRV_PCM_HW_PARAM_LAST_INTERVAL = SNDRV_PCM_HW_PARAM_TICK_TIME
 336 };
 337
 338 #define SNDRV_PCM_HW_PARAMS_RUNTIME             (1<<0)
 339
 340 struct sndrv_interval {
 341         unsigned int min, max;
 342         unsigned int openmin:1,
 343                      openmax:1,
 344                      integer:1,
 345                      empty:1;
 346 };
 347
 348 #define SNDRV_MASK_MAX  256
 349
 350 struct sndrv_mask {
 351         u_int32_t bits[(SNDRV_MASK_MAX+31)/32];
 352 };
 353
 354 struct sndrv_pcm_hw_params {
 355         unsigned int flags;
 356         struct sndrv_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
 357                                SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
 358         struct sndrv_mask mres[5];      /* reserved masks */
 359         struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
 360                                         SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
 361         struct sndrv_interval ires[9];  /* reserved intervals */
 362         unsigned int rmask;             /* W: requested masks */
 363         unsigned int cmask;             /* R: changed masks */
 364         unsigned int info;              /* R: Info flags for returned setup */
 365         unsigned int msbits;            /* R: used most significant bits */
 366         unsigned int rate_num;          /* R: rate numerator */
 367         unsigned int rate_den;          /* R: rate denominator */
 368         sndrv_pcm_uframes_t fifo_size;  /* R: chip FIFO size in frames */
 369         unsigned char reserved[64];     /* reserved for future */
 370 };
 371
 372 enum sndrv_pcm_tstamp {
 373         SNDRV_PCM_TSTAMP_NONE = 0,
 374         SNDRV_PCM_TSTAMP_MMAP,
 375         SNDRV_PCM_TSTAMP_LAST = SNDRV_PCM_TSTAMP_MMAP,
 376 };
 377
 378 struct sndrv_pcm_sw_params {
 379         enum sndrv_pcm_tstamp tstamp_mode;      /* timestamp mode */
 380         unsigned int period_step;
 381         unsigned int sleep_min;                 /* min ticks to sleep */
 382         sndrv_pcm_uframes_t avail_min;          /* min avail frames for wakeup */
 383         sndrv_pcm_uframes_t xfer_align;         /* xfer size need to be a multiple */
 384         sndrv_pcm_uframes_t start_threshold;    /* min hw_avail frames for automatic start */
 385         sndrv_pcm_uframes_t stop_threshold;     /* min avail frames for automatic stop */
 386         sndrv_pcm_uframes_t silence_threshold;  /* min distance from noise for silence filling */
 387         sndrv_pcm_uframes_t silence_size;       /* silence block size */
 388         sndrv_pcm_uframes_t boundary;           /* pointers wrap point */
 389         unsigned char reserved[64];             /* reserved for future */
 390 };
 391
 392 struct sndrv_pcm_channel_info {
 393         unsigned int channel;
 394         off_t offset;                   /* mmap offset */
 395         unsigned int first;             /* offset to first sample in bits */
 396         unsigned int step;              /* samples distance in bits */
 397 };
 398
 399 struct sndrv_pcm_status {
 400         enum sndrv_pcm_state state;     /* stream state */
 401         struct timespec trigger_tstamp; /* time when stream was started/stopped/paused */
 402         struct timespec tstamp;         /* reference timestamp */
 403         sndrv_pcm_uframes_t appl_ptr;   /* appl ptr */
 404         sndrv_pcm_uframes_t hw_ptr;     /* hw ptr */
 405         sndrv_pcm_sframes_t delay;      /* current delay in frames */
 406         sndrv_pcm_uframes_t avail;      /* number of frames available */
 407         sndrv_pcm_uframes_t avail_max;  /* max frames available on hw since last status */
 408         sndrv_pcm_uframes_t overrange;  /* count of ADC (capture) overrange detections from last status */
 409         enum sndrv_pcm_state suspended_state; /* suspended stream state */
 410         unsigned char reserved[60];     /* must be filled with zero */
 411 };
 412
 413 struct sndrv_pcm_mmap_status {
 414         enum sndrv_pcm_state state;     /* RO: state - SNDRV_PCM_STATE_XXXX */
 415         int pad1;                       /* Needed for 64 bit alignment */
 416         sndrv_pcm_uframes_t hw_ptr;     /* RO: hw ptr (0...boundary-1) */
 417         struct timespec tstamp;         /* Timestamp */
 418         enum sndrv_pcm_state suspended_state; /* RO: suspended stream state */
 419 };
 420
 421 struct sndrv_pcm_mmap_control {
 422         sndrv_pcm_uframes_t appl_ptr;   /* RW: appl ptr (0...boundary-1) */
 423         sndrv_pcm_uframes_t avail_min;  /* RW: min available frames for wakeup */
 424 };
 425
 426 struct sndrv_xferi {
 427         sndrv_pcm_sframes_t result;
 428         void *buf;
 429         sndrv_pcm_uframes_t frames;
 430 };
 431
 432 struct sndrv_xfern {
 433         sndrv_pcm_sframes_t result;
 434         void **bufs;
 435         sndrv_pcm_uframes_t frames;
 436 };
 437
 438 enum {
 439         SNDRV_PCM_IOCTL_PVERSION = _IOR('A', 0x00, int),
 440         SNDRV_PCM_IOCTL_INFO = _IOR('A', 0x01, struct sndrv_pcm_info),
 441         SNDRV_PCM_IOCTL_TSTAMP = _IOW('A', 0x02, int),
 442         SNDRV_PCM_IOCTL_HW_REFINE = _IOWR('A', 0x10, struct sndrv_pcm_hw_params),
 443         SNDRV_PCM_IOCTL_HW_PARAMS = _IOWR('A', 0x11, struct sndrv_pcm_hw_params),
 444         SNDRV_PCM_IOCTL_HW_FREE = _IO('A', 0x12),
 445         SNDRV_PCM_IOCTL_SW_PARAMS = _IOWR('A', 0x13, struct sndrv_pcm_sw_params),
 446         SNDRV_PCM_IOCTL_STATUS = _IOR('A', 0x20, struct sndrv_pcm_status),
 447         SNDRV_PCM_IOCTL_DELAY = _IOR('A', 0x21, sndrv_pcm_sframes_t),
 448         SNDRV_PCM_IOCTL_HWSYNC = _IO('A', 0x22),
 449         SNDRV_PCM_IOCTL_CHANNEL_INFO = _IOR('A', 0x32, struct sndrv_pcm_channel_info),
 450         SNDRV_PCM_IOCTL_PREPARE = _IO('A', 0x40),
 451         SNDRV_PCM_IOCTL_RESET = _IO('A', 0x41),
 452         SNDRV_PCM_IOCTL_START = _IO('A', 0x42),
 453         SNDRV_PCM_IOCTL_DROP = _IO('A', 0x43),
 454         SNDRV_PCM_IOCTL_DRAIN = _IO('A', 0x44),
 455         SNDRV_PCM_IOCTL_PAUSE = _IOW('A', 0x45, int),
 456         SNDRV_PCM_IOCTL_REWIND = _IOW('A', 0x46, sndrv_pcm_uframes_t),
 457         SNDRV_PCM_IOCTL_RESUME = _IO('A', 0x47),
 458         SNDRV_PCM_IOCTL_XRUN = _IO('A', 0x48),
 459         SNDRV_PCM_IOCTL_FORWARD = _IOW('A', 0x49, sndrv_pcm_uframes_t),
 460         SNDRV_PCM_IOCTL_WRITEI_FRAMES = _IOW('A', 0x50, struct sndrv_xferi),
 461         SNDRV_PCM_IOCTL_READI_FRAMES = _IOR('A', 0x51, struct sndrv_xferi),
 462         SNDRV_PCM_IOCTL_WRITEN_FRAMES = _IOW('A', 0x52, struct sndrv_xfern),
 463         SNDRV_PCM_IOCTL_READN_FRAMES = _IOR('A', 0x53, struct sndrv_xfern),
 464         SNDRV_PCM_IOCTL_LINK = _IOW('A', 0x60, int),
 465         SNDRV_PCM_IOCTL_UNLINK = _IO('A', 0x61),
 466 };
 467
 468 /* Trick to make alsa-lib/acinclude.m4 happy */
 469 #define SNDRV_PCM_IOCTL_REWIND SNDRV_PCM_IOCTL_REWIND
 470
 471 /*****************************************************************************
 472  *                                                                           *
 473  *                            MIDI v1.0 interface                            *
 474  *                                                                           *
 475  *****************************************************************************/
 476
 477 /*
 478  *  Raw MIDI section - /dev/snd/midi??
 479  */
 480
 481 #define SNDRV_RAWMIDI_VERSION           SNDRV_PROTOCOL_VERSION(2, 0, 0)
 482
 483 enum sndrv_rawmidi_stream {
 484         SNDRV_RAWMIDI_STREAM_OUTPUT = 0,
 485         SNDRV_RAWMIDI_STREAM_INPUT,
 486         SNDRV_RAWMIDI_STREAM_LAST = SNDRV_RAWMIDI_STREAM_INPUT,
 487 };
 488
 489 #define SNDRV_RAWMIDI_INFO_OUTPUT               0x00000001
 490 #define SNDRV_RAWMIDI_INFO_INPUT                0x00000002
 491 #define SNDRV_RAWMIDI_INFO_DUPLEX               0x00000004
 492
 493 struct sndrv_rawmidi_info {
 494         unsigned int device;            /* RO/WR (control): device number */
 495         unsigned int subdevice;         /* RO/WR (control): subdevice number */
 496         enum sndrv_rawmidi_stream stream; /* WR: stream */
 497         int card;                       /* R: card number */
 498         unsigned int flags;             /* SNDRV_RAWMIDI_INFO_XXXX */
 499         unsigned char id[64];           /* ID (user selectable) */
 500         unsigned char name[80];         /* name of device */
 501         unsigned char subname[32];      /* name of active or selected subdevice */
 502         unsigned int subdevices_count;
 503         unsigned int subdevices_avail;
 504         unsigned char reserved[64];     /* reserved for future use */
 505 };
 506
 507 struct sndrv_rawmidi_params {
 508         enum sndrv_rawmidi_stream stream;
 509         size_t buffer_size;             /* queue size in bytes */
 510         size_t avail_min;               /* minimum avail bytes for wakeup */
 511         unsigned int no_active_sensing: 1; /* do not send active sensing byte in close() */
 512         unsigned char reserved[16];     /* reserved for future use */
 513 };
 514
 515 struct sndrv_rawmidi_status {
 516         enum sndrv_rawmidi_stream stream;
 517         struct timespec tstamp;         /* Timestamp */
 518         size_t avail;                   /* available bytes */
 519         size_t xruns;                   /* count of overruns since last status (in bytes) */
 520         unsigned char reserved[16];     /* reserved for future use */
 521 };
 522
 523 enum {
 524         SNDRV_RAWMIDI_IOCTL_PVERSION = _IOR('W', 0x00, int),
 525         SNDRV_RAWMIDI_IOCTL_INFO = _IOR('W', 0x01, struct sndrv_rawmidi_info),
 526         SNDRV_RAWMIDI_IOCTL_PARAMS = _IOWR('W', 0x10, struct sndrv_rawmidi_params),
 527         SNDRV_RAWMIDI_IOCTL_STATUS = _IOWR('W', 0x20, struct sndrv_rawmidi_status),
 528         SNDRV_RAWMIDI_IOCTL_DROP = _IOW('W', 0x30, int),
 529         SNDRV_RAWMIDI_IOCTL_DRAIN = _IOW('W', 0x31, int),
 530 };
 531
 532 /*
 533  *  Timer section - /dev/snd/timer
 534  */
 535
 536 #define SNDRV_TIMER_VERSION             SNDRV_PROTOCOL_VERSION(2, 0, 1)
 537
 538 enum sndrv_timer_class {
 539         SNDRV_TIMER_CLASS_NONE = -1,
 540         SNDRV_TIMER_CLASS_SLAVE = 0,
 541         SNDRV_TIMER_CLASS_GLOBAL,
 542         SNDRV_TIMER_CLASS_CARD,
 543         SNDRV_TIMER_CLASS_PCM,
 544         SNDRV_TIMER_CLASS_LAST = SNDRV_TIMER_CLASS_PCM,
 545 };
 546
 547 /* slave timer classes */
 548 enum sndrv_timer_slave_class {
 549         SNDRV_TIMER_SCLASS_NONE = 0,
 550         SNDRV_TIMER_SCLASS_APPLICATION,
 551         SNDRV_TIMER_SCLASS_SEQUENCER,           /* alias */
 552         SNDRV_TIMER_SCLASS_OSS_SEQUENCER,       /* alias */
 553         SNDRV_TIMER_SCLASS_LAST = SNDRV_TIMER_SCLASS_OSS_SEQUENCER,
 554 };
 555
 556 /* global timers (device member) */
 557 #define SNDRV_TIMER_GLOBAL_SYSTEM       0
 558 #define SNDRV_TIMER_GLOBAL_RTC          1
 559
 560 /* info flags */
 561 #define SNDRV_TIMER_FLG_SLAVE           (1<<0)  /* cannot be controlled */
 562
 563 struct sndrv_timer_id {
 564         enum sndrv_timer_class dev_class;
 565         enum sndrv_timer_slave_class dev_sclass;
 566         int card;
 567         int device;
 568         int subdevice;
 569 };
 570
 571 struct sndrv_timer_ginfo {
 572         struct sndrv_timer_id tid;      /* requested timer ID */
 573         unsigned int flags;             /* timer flags - SNDRV_TIMER_FLG_* */
 574         int card;                       /* card number */
 575         unsigned char id[64];           /* timer identification */
 576         unsigned char name[80];         /* timer name */
 577         unsigned long reserved0;        /* reserved for future use */
 578         unsigned long resolution;       /* average period resolution in ns */
 579         unsigned long resolution_min;   /* minimal period resolution in ns */
 580         unsigned long resolution_max;   /* maximal period resolution in ns */
 581         unsigned int clients;           /* active timer clients */
 582         unsigned char reserved[32];
 583 };
 584
 585 struct sndrv_timer_gparams {
 586         struct sndrv_timer_id tid;      /* requested timer ID */
 587         unsigned long period_num;       /* requested precise period duration (in seconds) - numerator */
 588         unsigned long period_den;       /* requested precise period duration (in seconds) - denominator */
 589         unsigned char reserved[32];
 590 };
 591
 592 struct sndrv_timer_gstatus {
 593         struct sndrv_timer_id tid;      /* requested timer ID */
 594         unsigned long resolution;       /* current period resolution in ns */
 595         unsigned long resolution_num;   /* precise current period resolution (in seconds) - numerator */
 596         unsigned long resolution_den;   /* precise current period resolution (in seconds) - denominator */
 597         unsigned char reserved[32];
 598 };
 599
 600 struct sndrv_timer_select {
 601         struct sndrv_timer_id id;       /* bind to timer ID */
 602         unsigned char reserved[32];     /* reserved */
 603 };
 604
 605 struct sndrv_timer_info {
 606         unsigned int flags;             /* timer flags - SNDRV_TIMER_FLG_* */
 607         int card;                       /* card number */
 608         unsigned char id[64];           /* timer identificator */
 609         unsigned char name[80];         /* timer name */
 610         unsigned long reserved0;        /* reserved for future use */
 611         unsigned long resolution;       /* average period resolution in ns */
 612         unsigned char reserved[64];     /* reserved */
 613 };
 614
 615 #define SNDRV_TIMER_PSFLG_AUTO          (1<<0)  /* auto start, otherwise one-shot */
 616 #define SNDRV_TIMER_PSFLG_EXCLUSIVE     (1<<1)  /* exclusive use, precise start/stop/pause/continue */
 617
 618 struct sndrv_timer_params {
 619         unsigned int flags;             /* flags - SNDRV_MIXER_PSFLG_* */
 620         unsigned int ticks;             /* requested resolution in ticks */
 621         unsigned int queue_size;        /* total size of queue (32-1024) */
 622         unsigned int reserved0;         /* reserved, was: failure locations */
 623         unsigned int filter;            /* event filter (bitmask of SNDRV_TIMER_EVENT_*) */
 624         unsigned char reserved[60];     /* reserved */
 625 };
 626
 627 struct sndrv_timer_status {
 628         struct timespec tstamp;         /* Timestamp - last update */
 629         unsigned int resolution;        /* current period resolution in ns */
 630         unsigned int lost;              /* counter of master tick lost */
 631         unsigned int overrun;           /* count of read queue overruns */
 632         unsigned int queue;             /* used queue size */
 633         unsigned char reserved[64];     /* reserved */
 634 };
 635
 636 enum {
 637         SNDRV_TIMER_IOCTL_PVERSION = _IOR('T', 0x00, int),
 638         SNDRV_TIMER_IOCTL_NEXT_DEVICE = _IOWR('T', 0x01, struct sndrv_timer_id),
 639         SNDRV_TIMER_IOCTL_TREAD = _IOW('T', 0x02, int),
 640         SNDRV_TIMER_IOCTL_GINFO = _IOWR('T', 0x03, struct sndrv_timer_ginfo),
 641         SNDRV_TIMER_IOCTL_GPARAMS = _IOW('T', 0x04, struct sndrv_timer_gparams),
 642         SNDRV_TIMER_IOCTL_GSTATUS = _IOWR('T', 0x05, struct sndrv_timer_gstatus),
 643         SNDRV_TIMER_IOCTL_SELECT = _IOW('T', 0x10, struct sndrv_timer_select),
 644         SNDRV_TIMER_IOCTL_INFO = _IOR('T', 0x11, struct sndrv_timer_info),
 645         SNDRV_TIMER_IOCTL_PARAMS = _IOW('T', 0x12, struct sndrv_timer_params),
 646         SNDRV_TIMER_IOCTL_STATUS = _IOR('T', 0x14, struct sndrv_timer_status),
 647         SNDRV_TIMER_IOCTL_START = _IO('T', 0x20),
 648         SNDRV_TIMER_IOCTL_STOP = _IO('T', 0x21),
 649         SNDRV_TIMER_IOCTL_CONTINUE = _IO('T', 0x22),
 650         SNDRV_TIMER_IOCTL_PAUSE = _IO('T', 0x23),
 651 };
 652
 653 struct sndrv_timer_read {
 654         unsigned int resolution;
 655         unsigned int ticks;
 656 };
 657
 658 enum sndrv_timer_event {
 659         SNDRV_TIMER_EVENT_RESOLUTION = 0,       /* val = resolution in ns */
 660         SNDRV_TIMER_EVENT_TICK,                 /* val = ticks */
 661         SNDRV_TIMER_EVENT_START,                /* val = resolution in ns */
 662         SNDRV_TIMER_EVENT_STOP,                 /* val = 0 */
 663         SNDRV_TIMER_EVENT_CONTINUE,             /* val = resolution in ns */
 664         SNDRV_TIMER_EVENT_PAUSE,                /* val = 0 */
 665         /* master timer events for slave timer instances */
 666         SNDRV_TIMER_EVENT_MSTART = SNDRV_TIMER_EVENT_START + 10,
 667         SNDRV_TIMER_EVENT_MSTOP = SNDRV_TIMER_EVENT_STOP + 10,
 668         SNDRV_TIMER_EVENT_MCONTINUE = SNDRV_TIMER_EVENT_CONTINUE + 10,
 669         SNDRV_TIMER_EVENT_MPAUSE = SNDRV_TIMER_EVENT_PAUSE + 10,
 670 };
 671
 672 struct sndrv_timer_tread {
 673         enum sndrv_timer_event event;
 674         struct timespec tstamp;
 675         unsigned int val;
 676 };
 677
 678 /****************************************************************************
 679  *                                                                          *
 680  *        Section for driver control interface - /dev/snd/control?          *
 681  *                                                                          *
 682  ****************************************************************************/
 683
 684 #define SNDRV_CTL_VERSION               SNDRV_PROTOCOL_VERSION(2, 0, 2)
 685
 686 struct sndrv_ctl_card_info {
 687         int card;                       /* card number */
 688         int pad;                        /* reserved for future (was type) */
 689         unsigned char id[16];           /* ID of card (user selectable) */
 690         unsigned char driver[16];       /* Driver name */
 691         unsigned char name[32];         /* Short name of soundcard */
 692         unsigned char longname[80];     /* name + info text about soundcard */
 693         unsigned char reserved_[16];    /* reserved for future (was ID of mixer) */
 694         unsigned char mixername[80];    /* visual mixer identification */
 695         unsigned char components[80];   /* card components / fine identification, delimited with one space (AC97 etc..) */
 696         unsigned char reserved[48];     /* reserved for future */
 697 };
 698
 699 enum sndrv_ctl_elem_type {
 700         SNDRV_CTL_ELEM_TYPE_NONE = 0,           /* invalid */
 701         SNDRV_CTL_ELEM_TYPE_BOOLEAN,            /* boolean type */
 702         SNDRV_CTL_ELEM_TYPE_INTEGER,            /* integer type */
 703         SNDRV_CTL_ELEM_TYPE_ENUMERATED,         /* enumerated type */
 704         SNDRV_CTL_ELEM_TYPE_BYTES,              /* byte array */
 705         SNDRV_CTL_ELEM_TYPE_IEC958,             /* IEC958 (S/PDIF) setup */
 706         SNDRV_CTL_ELEM_TYPE_INTEGER64,          /* 64-bit integer type */
 707         SNDRV_CTL_ELEM_TYPE_LAST = SNDRV_CTL_ELEM_TYPE_INTEGER64,
 708 };
 709
 710 enum sndrv_ctl_elem_iface {
 711         SNDRV_CTL_ELEM_IFACE_CARD = 0,          /* global control */
 712         SNDRV_CTL_ELEM_IFACE_HWDEP,             /* hardware dependent device */
 713         SNDRV_CTL_ELEM_IFACE_MIXER,             /* virtual mixer device */
 714         SNDRV_CTL_ELEM_IFACE_PCM,               /* PCM device */
 715         SNDRV_CTL_ELEM_IFACE_RAWMIDI,           /* RawMidi device */
 716         SNDRV_CTL_ELEM_IFACE_TIMER,             /* timer device */
 717         SNDRV_CTL_ELEM_IFACE_SEQUENCER,         /* sequencer client */
 718         SNDRV_CTL_ELEM_IFACE_LAST = SNDRV_CTL_ELEM_IFACE_SEQUENCER,
 719 };
 720
 721 #define SNDRV_CTL_ELEM_ACCESS_READ              (1<<0)
 722 #define SNDRV_CTL_ELEM_ACCESS_WRITE             (1<<1)
 723 #define SNDRV_CTL_ELEM_ACCESS_READWRITE         (SNDRV_CTL_ELEM_ACCESS_READ|SNDRV_CTL_ELEM_ACCESS_WRITE)
 724 #define SNDRV_CTL_ELEM_ACCESS_VOLATILE          (1<<2)  /* control value may be changed without a notification */
 725 #define SNDRV_CTL_ELEM_ACCESS_TIMESTAMP         (1<<2)  /* when was control changed */
 726 #define SNDRV_CTL_ELEM_ACCESS_INACTIVE          (1<<8)  /* control does actually nothing, but may be updated */
 727 #define SNDRV_CTL_ELEM_ACCESS_LOCK              (1<<9)  /* write lock */
 728 #define SNDRV_CTL_ELEM_ACCESS_OWNER             (1<<10) /* write lock owner */
 729 #define SNDRV_CTL_ELEM_ACCESS_DINDIRECT         (1<<30) /* indirect access for matrix dimensions in the info structure */
 730 #define SNDRV_CTL_ELEM_ACCESS_INDIRECT          (1<<31) /* indirect access for element value in the value structure */
 731
 732 /* for further details see the ACPI and PCI power management specification */
 733 #define SNDRV_CTL_POWER_D0              0x0000  /* full On */
 734 #define SNDRV_CTL_POWER_D1              0x0100  /* partial On */
 735 #define SNDRV_CTL_POWER_D2              0x0200  /* partial On */
 736 #define SNDRV_CTL_POWER_D3              0x0300  /* Off */
 737 #define SNDRV_CTL_POWER_D3hot           (SNDRV_CTL_POWER_D3|0x0000)     /* Off, with power */
 738 #define SNDRV_CTL_POWER_D3cold          (SNDRV_CTL_POWER_D3|0x0001)     /* Off, without power */
 739
 740 struct sndrv_ctl_elem_id {
 741         unsigned int numid;             /* numeric identifier, zero = invalid */
 742         enum sndrv_ctl_elem_iface iface; /* interface identifier */
 743         unsigned int device;            /* device/client number */
 744         unsigned int subdevice;         /* subdevice (substream) number */
 745         unsigned char name[44];         /* ASCII name of item */
 746         unsigned int index;             /* index of item */
 747 };
 748
 749 struct sndrv_ctl_elem_list {
 750         unsigned int offset;            /* W: first element ID to get */
 751         unsigned int space;             /* W: count of element IDs to get */
 752         unsigned int used;              /* R: count of element IDs set */
 753         unsigned int count;             /* R: count of all elements */
 754         struct sndrv_ctl_elem_id *pids; /* R: IDs */
 755         unsigned char reserved[50];
 756 };
 757
 758 struct sndrv_ctl_elem_info {
 759         struct sndrv_ctl_elem_id id;    /* W: element ID */
 760         enum sndrv_ctl_elem_type type;  /* R: value type - SNDRV_CTL_ELEM_TYPE_* */
 761         unsigned int access;            /* R: value access (bitmask) - SNDRV_CTL_ELEM_ACCESS_* */
 762         unsigned int count;             /* count of values */
 763         pid_t owner;                    /* owner's PID of this control */
 764         union {
 765                 struct {
 766                         long min;               /* R: minimum value */
 767                         long max;               /* R: maximum value */
 768                         long step;              /* R: step (0 variable) */
 769                 } integer;
 770                 struct {
 771                         long long min;          /* R: minimum value */
 772                         long long max;          /* R: maximum value */
 773                         long long step;         /* R: step (0 variable) */
 774                 } integer64;
 775                 struct {
 776                         unsigned int items;     /* R: number of items */
 777                         unsigned int item;      /* W: item number */
 778                         char name[64];          /* R: value name */
 779                 } enumerated;
 780                 unsigned char reserved[128];
 781         } value;
 782         union {
 783                 unsigned short d[4];            /* dimensions */
 784                 unsigned short *d_ptr;          /* indirect */
 785         } dimen;
 786         unsigned char reserved[64-4*sizeof(unsigned short)];
 787 };
 788
 789 struct sndrv_ctl_elem_value {
 790         struct sndrv_ctl_elem_id id;    /* W: element ID */
 791         unsigned int indirect: 1;       /* W: use indirect pointer (xxx_ptr member) */
 792         union {
 793                 union {
 794                         long value[128];
 795                         long *value_ptr;
 796                 } integer;
 797                 union {
 798                         long long value[64];
 799                         long long *value_ptr;
 800                 } integer64;
 801                 union {
 802                         unsigned int item[128];
 803                         unsigned int *item_ptr;
 804                 } enumerated;
 805                 union {
 806                         unsigned char data[512];
 807                         unsigned char *data_ptr;
 808                 } bytes;
 809                 struct sndrv_aes_iec958 iec958;
 810         } value;                /* RO */
 811         struct timespec tstamp;
 812         unsigned char reserved[128-sizeof(struct timespec)];
 813 };
 814
 815 enum {
 816         SNDRV_CTL_IOCTL_PVERSION = _IOR('U', 0x00, int),
 817         SNDRV_CTL_IOCTL_CARD_INFO = _IOR('U', 0x01, struct sndrv_ctl_card_info),
 818         SNDRV_CTL_IOCTL_ELEM_LIST = _IOWR('U', 0x10, struct sndrv_ctl_elem_list),
 819         SNDRV_CTL_IOCTL_ELEM_INFO = _IOWR('U', 0x11, struct sndrv_ctl_elem_info),
 820         SNDRV_CTL_IOCTL_ELEM_READ = _IOWR('U', 0x12, struct sndrv_ctl_elem_value),
 821         SNDRV_CTL_IOCTL_ELEM_WRITE = _IOWR('U', 0x13, struct sndrv_ctl_elem_value),
 822         SNDRV_CTL_IOCTL_ELEM_LOCK = _IOW('U', 0x14, struct sndrv_ctl_elem_id),
 823         SNDRV_CTL_IOCTL_ELEM_UNLOCK = _IOW('U', 0x15, struct sndrv_ctl_elem_id),
 824         SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS = _IOWR('U', 0x16, int),
 825         SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE = _IOWR('U', 0x20, int),
 826         SNDRV_CTL_IOCTL_HWDEP_INFO = _IOR('U', 0x21, struct sndrv_hwdep_info),
 827         SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE = _IOR('U', 0x30, int),
 828         SNDRV_CTL_IOCTL_PCM_INFO = _IOWR('U', 0x31, struct sndrv_pcm_info),
 829         SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE = _IOW('U', 0x32, int),
 830         SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE = _IOWR('U', 0x40, int),
 831         SNDRV_CTL_IOCTL_RAWMIDI_INFO = _IOWR('U', 0x41, struct sndrv_rawmidi_info),
 832         SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE = _IOW('U', 0x42, int),
 833         SNDRV_CTL_IOCTL_POWER = _IOWR('U', 0xd0, int),
 834         SNDRV_CTL_IOCTL_POWER_STATE = _IOR('U', 0xd1, int),
 835 };
 836
 837 /*
 838  *  Read interface.
 839  */
 840
 841 enum sndrv_ctl_event_type {
 842         SNDRV_CTL_EVENT_ELEM = 0,
 843         SNDRV_CTL_EVENT_LAST = SNDRV_CTL_EVENT_ELEM,
 844 };
 845
 846 #define SNDRV_CTL_EVENT_MASK_VALUE      (1<<0)  /* element value was changed */
 847 #define SNDRV_CTL_EVENT_MASK_INFO       (1<<1)  /* element info was changed */
 848 #define SNDRV_CTL_EVENT_MASK_ADD        (1<<2)  /* element was added */
 849 #define SNDRV_CTL_EVENT_MASK_REMOVE     (~0U)   /* element was removed */
 850
 851 struct sndrv_ctl_event {
 852         enum sndrv_ctl_event_type type; /* event type - SNDRV_CTL_EVENT_* */
 853         union {
 854                 struct {
 855                         unsigned int mask;
 856                         struct sndrv_ctl_elem_id id;
 857                 } elem;
 858                 unsigned char data8[60];
 859         } data;
 860 };
 861
 862 /*
 863  *  Control names
 864  */
 865
 866 #define SNDRV_CTL_NAME_NONE                             ""
 867 #define SNDRV_CTL_NAME_PLAYBACK                         "Playback "
 868 #define SNDRV_CTL_NAME_CAPTURE                          "Capture "
 869
 870 #define SNDRV_CTL_NAME_IEC958_NONE                      ""
 871 #define SNDRV_CTL_NAME_IEC958_SWITCH                    "Switch"
 872 #define SNDRV_CTL_NAME_IEC958_VOLUME                    "Volume"
 873 #define SNDRV_CTL_NAME_IEC958_DEFAULT                   "Default"
 874 #define SNDRV_CTL_NAME_IEC958_MASK                      "Mask"
 875 #define SNDRV_CTL_NAME_IEC958_CON_MASK                  "Con Mask"
 876 #define SNDRV_CTL_NAME_IEC958_PRO_MASK                  "Pro Mask"
 877 #define SNDRV_CTL_NAME_IEC958_PCM_STREAM                "PCM Stream"
 878 #define SNDRV_CTL_NAME_IEC958(expl,direction,what)      "IEC958 " expl SNDRV_CTL_NAME_##direction SNDRV_CTL_NAME_IEC958_##what
 879
 880 /*
 881  *
 882  */
 883
 884 struct sndrv_xferv {
 885         const struct iovec *vector;
 886         unsigned long count;
 887 };
 888
 889 enum {
 890         SNDRV_IOCTL_READV = _IOW('K', 0x00, struct sndrv_xferv),
 891         SNDRV_IOCTL_WRITEV = _IOW('K', 0x01, struct sndrv_xferv),
 892 };
 893
 894 #endif /* __SOUND_ASOUND_H */