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 #ifdef  __LITTLE_ENDIAN
  37 #define SNDRV_LITTLE_ENDIAN
  38 #else
  39 #ifdef __BIG_ENDIAN
  40 #define SNDRV_BIG_ENDIAN
  41 #else
  42 #error "Unsupported endian..."
  43 #endif
  44 #endif
  45
  46 #else /* !__KERNEL__ */
  47
  48 #include <endian.h>
  49 #if __BYTE_ORDER == __LITTLE_ENDIAN
  50 #define SNDRV_LITTLE_ENDIAN
  51 #elif __BYTE_ORDER == __BIG_ENDIAN
  52 #define SNDRV_BIG_ENDIAN
  53 #else
  54 #error "Unsupported endian..."
  55 #endif
  56
  57 #endif /* __KERNEL **/
  58
  59 #endif /* LINUX */
  60
  61 #ifndef __KERNEL__
  62 #include <sys/time.h>
  63 #include <sys/types.h>
  64 #endif
  65
  66 /*
  67  *  protocol version
  68  */
  69
  70 #define SNDRV_PROTOCOL_VERSION(major, minor, subminor) (((major)<<16)|((minor)<<8)|(subminor))
  71 #define SNDRV_PROTOCOL_MAJOR(version) (((version)>>16)&0xffff)
  72 #define SNDRV_PROTOCOL_MINOR(version) (((version)>>8)&0xff)
  73 #define SNDRV_PROTOCOL_MICRO(version) ((version)&0xff)
  74 #define SNDRV_PROTOCOL_INCOMPATIBLE(kversion, uversion) \
  75         (SNDRV_PROTOCOL_MAJOR(kversion) != SNDRV_PROTOCOL_MAJOR(uversion) || \
  76          (SNDRV_PROTOCOL_MAJOR(kversion) == SNDRV_PROTOCOL_MAJOR(uversion) && \
  77            SNDRV_PROTOCOL_MINOR(kversion) != SNDRV_PROTOCOL_MINOR(uversion)))
  78
  79 /****************************************************************************
  80  *                                                                          *
  81  *        Digital audio interface                                           *
  82  *                                                                          *
  83  ****************************************************************************/
  84
  85 struct sndrv_aes_iec958 {
  86         unsigned char status[24];       /* AES/IEC958 channel status bits */
  87         unsigned char subcode[147];     /* AES/IEC958 subcode bits */
  88         unsigned char pad;              /* nothing */
  89         unsigned char dig_subframe[4];  /* AES/IEC958 subframe bits */
  90 };
  91
  92 /****************************************************************************
  93  *                                                                          *
  94  *      Section for driver hardware dependent interface - /dev/snd/hw?      *
  95  *                                                                          *
  96  ****************************************************************************/
  97
  98 #define SNDRV_HWDEP_VERSION             SNDRV_PROTOCOL_VERSION(1, 0, 1)
  99
 100 enum sndrv_hwdep_iface {
 101         SNDRV_HWDEP_IFACE_OPL2 = 0,
 102         SNDRV_HWDEP_IFACE_OPL3,
 103         SNDRV_HWDEP_IFACE_OPL4,
 104         SNDRV_HWDEP_IFACE_SB16CSP,      /* Creative Signal Processor */
 105         SNDRV_HWDEP_IFACE_EMU10K1,      /* FX8010 processor in EMU10K1 chip */
 106         SNDRV_HWDEP_IFACE_YSS225,       /* Yamaha FX processor */
 107         SNDRV_HWDEP_IFACE_ICS2115,      /* Wavetable synth */
 108         SNDRV_HWDEP_IFACE_SSCAPE,       /* Ensoniq SoundScape ISA card (MC68EC000) */
 109         SNDRV_HWDEP_IFACE_VX,           /* Digigram VX cards */
 110         SNDRV_HWDEP_IFACE_MIXART,       /* Digigram miXart cards */
 111         SNDRV_HWDEP_IFACE_USX2Y,        /* Tascam US122, US224 & US428 usb */
 112         SNDRV_HWDEP_IFACE_EMUX_WAVETABLE, /* EmuX wavetable */
 113         SNDRV_HWDEP_IFACE_BLUETOOTH,    /* Bluetooth audio */
 114         SNDRV_HWDEP_IFACE_USX2Y_PCM,    /* Tascam US122, US224 & US428 rawusb pcm */
 115         SNDRV_HWDEP_IFACE_PCXHR,        /* Digigram PCXHR */
 116
 117         /* Don't forget to change the following: */
 118         SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_PCXHR
 119 };
 120
 121 struct sndrv_hwdep_info {
 122         unsigned int device;            /* WR: device number */
 123         int card;                       /* R: card number */
 124         unsigned char id[64];           /* ID (user selectable) */
 125         unsigned char name[80];         /* hwdep name */
 126         enum sndrv_hwdep_iface iface;   /* hwdep interface */
 127         unsigned char reserved[64];     /* reserved for future */
 128 };
 129
 130 /* generic DSP loader */
 131 struct sndrv_hwdep_dsp_status {
 132         unsigned int version;           /* R: driver-specific version */
 133         unsigned char id[32];           /* R: driver-specific ID string */
 134         unsigned int num_dsps;          /* R: number of DSP images to transfer */
 135         unsigned int dsp_loaded;        /* R: bit flags indicating the loaded DSPs */
 136         unsigned int chip_ready;        /* R: 1 = initialization finished */
 137         unsigned char reserved[16];     /* reserved for future use */
 138 };
 139
 140 struct sndrv_hwdep_dsp_image {
 141         unsigned int index;             /* W: DSP index */
 142         unsigned char name[64];         /* W: ID (e.g. file name) */
 143         unsigned char __user *image;    /* W: binary image */
 144         size_t length;                  /* W: size of image in bytes */
 145         unsigned long driver_data;      /* W: driver-specific data */
 146 };
 147
 148 enum {
 149         SNDRV_HWDEP_IOCTL_PVERSION = _IOR ('H', 0x00, int),
 150         SNDRV_HWDEP_IOCTL_INFO = _IOR ('H', 0x01, struct sndrv_hwdep_info),
 151         SNDRV_HWDEP_IOCTL_DSP_STATUS = _IOR('H', 0x02, struct sndrv_hwdep_dsp_status),
 152         SNDRV_HWDEP_IOCTL_DSP_LOAD   = _IOW('H', 0x03, struct sndrv_hwdep_dsp_image)
 153 };
 154
 155 /*****************************************************************************
 156  *                                                                           *
 157  *             Digital Audio (PCM) interface - /dev/snd/pcm??                *
 158  *                                                                           *
 159  *****************************************************************************/
 160
 161 #define SNDRV_PCM_VERSION               SNDRV_PROTOCOL_VERSION(2, 0, 7)
 162
 163 typedef unsigned long sndrv_pcm_uframes_t;
 164 typedef long sndrv_pcm_sframes_t;
 165
 166 enum sndrv_pcm_class {
 167         SNDRV_PCM_CLASS_GENERIC = 0,    /* standard mono or stereo device */
 168         SNDRV_PCM_CLASS_MULTI,          /* multichannel device */
 169         SNDRV_PCM_CLASS_MODEM,          /* software modem class */
 170         SNDRV_PCM_CLASS_DIGITIZER,      /* digitizer class */
 171         /* Don't forget to change the following: */
 172         SNDRV_PCM_CLASS_LAST = SNDRV_PCM_CLASS_DIGITIZER,
 173 };
 174
 175 enum sndrv_pcm_subclass {
 176         SNDRV_PCM_SUBCLASS_GENERIC_MIX = 0, /* mono or stereo subdevices are mixed together */
 177         SNDRV_PCM_SUBCLASS_MULTI_MIX,   /* multichannel subdevices are mixed together */
 178         /* Don't forget to change the following: */
 179         SNDRV_PCM_SUBCLASS_LAST = SNDRV_PCM_SUBCLASS_MULTI_MIX,
 180 };
 181
 182 enum sndrv_pcm_stream {
 183         SNDRV_PCM_STREAM_PLAYBACK = 0,
 184         SNDRV_PCM_STREAM_CAPTURE,
 185         SNDRV_PCM_STREAM_LAST = SNDRV_PCM_STREAM_CAPTURE,
 186 };
 187
 188 enum sndrv_pcm_access {
 189         SNDRV_PCM_ACCESS_MMAP_INTERLEAVED = 0,  /* interleaved mmap */
 190         SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED,   /* noninterleaved mmap */
 191         SNDRV_PCM_ACCESS_MMAP_COMPLEX,          /* complex mmap */
 192         SNDRV_PCM_ACCESS_RW_INTERLEAVED,        /* readi/writei */
 193         SNDRV_PCM_ACCESS_RW_NONINTERLEAVED,     /* readn/writen */
 194         SNDRV_PCM_ACCESS_LAST = SNDRV_PCM_ACCESS_RW_NONINTERLEAVED,
 195 };
 196
 197 enum sndrv_pcm_format {
 198         SNDRV_PCM_FORMAT_S8 = 0,
 199         SNDRV_PCM_FORMAT_U8,
 200         SNDRV_PCM_FORMAT_S16_LE,
 201         SNDRV_PCM_FORMAT_S16_BE,
 202         SNDRV_PCM_FORMAT_U16_LE,
 203         SNDRV_PCM_FORMAT_U16_BE,
 204         SNDRV_PCM_FORMAT_S24_LE,        /* low three bytes */
 205         SNDRV_PCM_FORMAT_S24_BE,        /* low three bytes */
 206         SNDRV_PCM_FORMAT_U24_LE,        /* low three bytes */
 207         SNDRV_PCM_FORMAT_U24_BE,        /* low three bytes */
 208         SNDRV_PCM_FORMAT_S32_LE,
 209         SNDRV_PCM_FORMAT_S32_BE,
 210         SNDRV_PCM_FORMAT_U32_LE,
 211         SNDRV_PCM_FORMAT_U32_BE,
 212         SNDRV_PCM_FORMAT_FLOAT_LE,      /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
 213         SNDRV_PCM_FORMAT_FLOAT_BE,      /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
 214         SNDRV_PCM_FORMAT_FLOAT64_LE,    /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
 215         SNDRV_PCM_FORMAT_FLOAT64_BE,    /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
 216         SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE,    /* IEC-958 subframe, Little Endian */
 217         SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE,    /* IEC-958 subframe, Big Endian */
 218         SNDRV_PCM_FORMAT_MU_LAW,
 219         SNDRV_PCM_FORMAT_A_LAW,
 220         SNDRV_PCM_FORMAT_IMA_ADPCM,
 221         SNDRV_PCM_FORMAT_MPEG,
 222         SNDRV_PCM_FORMAT_GSM,
 223         SNDRV_PCM_FORMAT_SPECIAL = 31,
 224         SNDRV_PCM_FORMAT_S24_3LE = 32,  /* in three bytes */
 225         SNDRV_PCM_FORMAT_S24_3BE,       /* in three bytes */
 226         SNDRV_PCM_FORMAT_U24_3LE,       /* in three bytes */
 227         SNDRV_PCM_FORMAT_U24_3BE,       /* in three bytes */
 228         SNDRV_PCM_FORMAT_S20_3LE,       /* in three bytes */
 229         SNDRV_PCM_FORMAT_S20_3BE,       /* in three bytes */
 230         SNDRV_PCM_FORMAT_U20_3LE,       /* in three bytes */
 231         SNDRV_PCM_FORMAT_U20_3BE,       /* in three bytes */
 232         SNDRV_PCM_FORMAT_S18_3LE,       /* in three bytes */
 233         SNDRV_PCM_FORMAT_S18_3BE,       /* in three bytes */
 234         SNDRV_PCM_FORMAT_U18_3LE,       /* in three bytes */
 235         SNDRV_PCM_FORMAT_U18_3BE,       /* in three bytes */
 236         SNDRV_PCM_FORMAT_LAST = SNDRV_PCM_FORMAT_U18_3BE,
 237
 238 #ifdef SNDRV_LITTLE_ENDIAN
 239         SNDRV_PCM_FORMAT_S16 = SNDRV_PCM_FORMAT_S16_LE,
 240         SNDRV_PCM_FORMAT_U16 = SNDRV_PCM_FORMAT_U16_LE,
 241         SNDRV_PCM_FORMAT_S24 = SNDRV_PCM_FORMAT_S24_LE,
 242         SNDRV_PCM_FORMAT_U24 = SNDRV_PCM_FORMAT_U24_LE,
 243         SNDRV_PCM_FORMAT_S32 = SNDRV_PCM_FORMAT_S32_LE,
 244         SNDRV_PCM_FORMAT_U32 = SNDRV_PCM_FORMAT_U32_LE,
 245         SNDRV_PCM_FORMAT_FLOAT = SNDRV_PCM_FORMAT_FLOAT_LE,
 246         SNDRV_PCM_FORMAT_FLOAT64 = SNDRV_PCM_FORMAT_FLOAT64_LE,
 247         SNDRV_PCM_FORMAT_IEC958_SUBFRAME = SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE,
 248 #endif
 249 #ifdef SNDRV_BIG_ENDIAN
 250         SNDRV_PCM_FORMAT_S16 = SNDRV_PCM_FORMAT_S16_BE,
 251         SNDRV_PCM_FORMAT_U16 = SNDRV_PCM_FORMAT_U16_BE,
 252         SNDRV_PCM_FORMAT_S24 = SNDRV_PCM_FORMAT_S24_BE,
 253         SNDRV_PCM_FORMAT_U24 = SNDRV_PCM_FORMAT_U24_BE,
 254         SNDRV_PCM_FORMAT_S32 = SNDRV_PCM_FORMAT_S32_BE,
 255         SNDRV_PCM_FORMAT_U32 = SNDRV_PCM_FORMAT_U32_BE,
 256         SNDRV_PCM_FORMAT_FLOAT = SNDRV_PCM_FORMAT_FLOAT_BE,
 257         SNDRV_PCM_FORMAT_FLOAT64 = SNDRV_PCM_FORMAT_FLOAT64_BE,
 258         SNDRV_PCM_FORMAT_IEC958_SUBFRAME = SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE,
 259 #endif
 260 };
 261
 262 enum sndrv_pcm_subformat {
 263         SNDRV_PCM_SUBFORMAT_STD = 0,
 264         SNDRV_PCM_SUBFORMAT_LAST = SNDRV_PCM_SUBFORMAT_STD,
 265 };
 266
 267 #define SNDRV_PCM_INFO_MMAP             0x00000001      /* hardware supports mmap */
 268 #define SNDRV_PCM_INFO_MMAP_VALID       0x00000002      /* period data are valid during transfer */
 269 #define SNDRV_PCM_INFO_DOUBLE           0x00000004      /* Double buffering needed for PCM start/stop */
 270 #define SNDRV_PCM_INFO_BATCH            0x00000010      /* double buffering */
 271 #define SNDRV_PCM_INFO_INTERLEAVED      0x00000100      /* channels are interleaved */
 272 #define SNDRV_PCM_INFO_NONINTERLEAVED   0x00000200      /* channels are not interleaved */
 273 #define SNDRV_PCM_INFO_COMPLEX          0x00000400      /* complex frame organization (mmap only) */
 274 #define SNDRV_PCM_INFO_BLOCK_TRANSFER   0x00010000      /* hardware transfer block of samples */
 275 #define SNDRV_PCM_INFO_OVERRANGE        0x00020000      /* hardware supports ADC (capture) overrange detection */
 276 #define SNDRV_PCM_INFO_RESUME           0x00040000      /* hardware supports stream resume after suspend */
 277 #define SNDRV_PCM_INFO_PAUSE            0x00080000      /* pause ioctl is supported */
 278 #define SNDRV_PCM_INFO_HALF_DUPLEX      0x00100000      /* only half duplex */
 279 #define SNDRV_PCM_INFO_JOINT_DUPLEX     0x00200000      /* playback and capture stream are somewhat correlated */
 280 #define SNDRV_PCM_INFO_SYNC_START       0x00400000      /* pcm support some kind of sync go */
 281
 282 enum sndrv_pcm_state {
 283         SNDRV_PCM_STATE_OPEN = 0,       /* stream is open */
 284         SNDRV_PCM_STATE_SETUP,          /* stream has a setup */
 285         SNDRV_PCM_STATE_PREPARED,       /* stream is ready to start */
 286         SNDRV_PCM_STATE_RUNNING,        /* stream is running */
 287         SNDRV_PCM_STATE_XRUN,           /* stream reached an xrun */
 288         SNDRV_PCM_STATE_DRAINING,       /* stream is draining */
 289         SNDRV_PCM_STATE_PAUSED,         /* stream is paused */
 290         SNDRV_PCM_STATE_SUSPENDED,      /* hardware is suspended */
 291         SNDRV_PCM_STATE_DISCONNECTED,   /* hardware is disconnected */
 292         SNDRV_PCM_STATE_LAST = SNDRV_PCM_STATE_DISCONNECTED,
 293 };
 294
 295 enum {
 296         SNDRV_PCM_MMAP_OFFSET_DATA = 0x00000000,
 297         SNDRV_PCM_MMAP_OFFSET_STATUS = 0x80000000,
 298         SNDRV_PCM_MMAP_OFFSET_CONTROL = 0x81000000,
 299 };
 300
 301 union sndrv_pcm_sync_id {
 302         unsigned char id[16];
 303         unsigned short id16[8];
 304         unsigned int id32[4];
 305 };
 306
 307 struct sndrv_pcm_info {
 308         unsigned int device;            /* RO/WR (control): device number */
 309         unsigned int subdevice;         /* RO/WR (control): subdevice number */
 310         enum sndrv_pcm_stream stream;   /* RO/WR (control): stream number */
 311         int card;                       /* R: card number */
 312         unsigned char id[64];           /* ID (user selectable) */
 313         unsigned char name[80];         /* name of this device */
 314         unsigned char subname[32];      /* subdevice name */
 315         enum sndrv_pcm_class dev_class; /* SNDRV_PCM_CLASS_* */
 316         enum sndrv_pcm_subclass dev_subclass; /* SNDRV_PCM_SUBCLASS_* */
 317         unsigned int subdevices_count;
 318         unsigned int subdevices_avail;
 319         union sndrv_pcm_sync_id sync;   /* hardware synchronization ID */
 320         unsigned char reserved[64];     /* reserved for future... */
 321 };
 322
 323 enum sndrv_pcm_hw_param {
 324         SNDRV_PCM_HW_PARAM_ACCESS = 0,  /* Access type */
 325         SNDRV_PCM_HW_PARAM_FIRST_MASK = SNDRV_PCM_HW_PARAM_ACCESS,
 326         SNDRV_PCM_HW_PARAM_FORMAT,      /* Format */
 327         SNDRV_PCM_HW_PARAM_SUBFORMAT,   /* Subformat */
 328         SNDRV_PCM_HW_PARAM_LAST_MASK = SNDRV_PCM_HW_PARAM_SUBFORMAT,
 329
 330         SNDRV_PCM_HW_PARAM_SAMPLE_BITS = 8, /* Bits per sample */
 331         SNDRV_PCM_HW_PARAM_FIRST_INTERVAL = SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 332         SNDRV_PCM_HW_PARAM_FRAME_BITS,  /* Bits per frame */
 333         SNDRV_PCM_HW_PARAM_CHANNELS,    /* Channels */
 334         SNDRV_PCM_HW_PARAM_RATE,        /* Approx rate */
 335         SNDRV_PCM_HW_PARAM_PERIOD_TIME, /* Approx distance between interrupts
 336                                            in us */
 337         SNDRV_PCM_HW_PARAM_PERIOD_SIZE, /* Approx frames between interrupts */
 338         SNDRV_PCM_HW_PARAM_PERIOD_BYTES, /* Approx bytes between interrupts */
 339         SNDRV_PCM_HW_PARAM_PERIODS,     /* Approx interrupts per buffer */
 340         SNDRV_PCM_HW_PARAM_BUFFER_TIME, /* Approx duration of buffer in us */
 341         SNDRV_PCM_HW_PARAM_BUFFER_SIZE, /* Size of buffer in frames */
 342         SNDRV_PCM_HW_PARAM_BUFFER_BYTES, /* Size of buffer in bytes */
 343         SNDRV_PCM_HW_PARAM_TICK_TIME,   /* Approx tick duration in us */
 344         SNDRV_PCM_HW_PARAM_LAST_INTERVAL = SNDRV_PCM_HW_PARAM_TICK_TIME
 345 };
 346
 347 #define SNDRV_PCM_HW_PARAMS_RUNTIME             (1<<0)
 348
 349 struct sndrv_interval {
 350         unsigned int min, max;
 351         unsigned int openmin:1,
 352                      openmax:1,
 353                      integer:1,
 354                      empty:1;
 355 };
 356
 357 #define SNDRV_MASK_MAX  256
 358
 359 struct sndrv_mask {
 360         u_int32_t bits[(SNDRV_MASK_MAX+31)/32];
 361 };
 362
 363 struct sndrv_pcm_hw_params {
 364         unsigned int flags;
 365         struct sndrv_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
 366                                SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
 367         struct sndrv_mask mres[5];      /* reserved masks */
 368         struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
 369                                         SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
 370         struct sndrv_interval ires[9];  /* reserved intervals */
 371         unsigned int rmask;             /* W: requested masks */
 372         unsigned int cmask;             /* R: changed masks */
 373         unsigned int info;              /* R: Info flags for returned setup */
 374         unsigned int msbits;            /* R: used most significant bits */
 375         unsigned int rate_num;          /* R: rate numerator */
 376         unsigned int rate_den;          /* R: rate denominator */
 377         sndrv_pcm_uframes_t fifo_size;  /* R: chip FIFO size in frames */
 378         unsigned char reserved[64];     /* reserved for future */
 379 };
 380
 381 enum sndrv_pcm_tstamp {
 382         SNDRV_PCM_TSTAMP_NONE = 0,
 383         SNDRV_PCM_TSTAMP_MMAP,
 384         SNDRV_PCM_TSTAMP_LAST = SNDRV_PCM_TSTAMP_MMAP,
 385 };
 386
 387 struct sndrv_pcm_sw_params {
 388         enum sndrv_pcm_tstamp tstamp_mode;      /* timestamp mode */
 389         unsigned int period_step;
 390         unsigned int sleep_min;                 /* min ticks to sleep */
 391         sndrv_pcm_uframes_t avail_min;          /* min avail frames for wakeup */
 392         sndrv_pcm_uframes_t xfer_align;         /* xfer size need to be a multiple */
 393         sndrv_pcm_uframes_t start_threshold;    /* min hw_avail frames for automatic start */
 394         sndrv_pcm_uframes_t stop_threshold;     /* min avail frames for automatic stop */
 395         sndrv_pcm_uframes_t silence_threshold;  /* min distance from noise for silence filling */
 396         sndrv_pcm_uframes_t silence_size;       /* silence block size */
 397         sndrv_pcm_uframes_t boundary;           /* pointers wrap point */
 398         unsigned char reserved[64];             /* reserved for future */
 399 };
 400
 401 struct sndrv_pcm_channel_info {
 402         unsigned int channel;
 403         off_t offset;                   /* mmap offset */
 404         unsigned int first;             /* offset to first sample in bits */
 405         unsigned int step;              /* samples distance in bits */
 406 };
 407
 408 struct sndrv_pcm_status {
 409         enum sndrv_pcm_state state;     /* stream state */
 410         struct timespec trigger_tstamp; /* time when stream was started/stopped/paused */
 411         struct timespec tstamp;         /* reference timestamp */
 412         sndrv_pcm_uframes_t appl_ptr;   /* appl ptr */
 413         sndrv_pcm_uframes_t hw_ptr;     /* hw ptr */
 414         sndrv_pcm_sframes_t delay;      /* current delay in frames */
 415         sndrv_pcm_uframes_t avail;      /* number of frames available */
 416         sndrv_pcm_uframes_t avail_max;  /* max frames available on hw since last status */
 417         sndrv_pcm_uframes_t overrange;  /* count of ADC (capture) overrange detections from last status */
 418         enum sndrv_pcm_state suspended_state; /* suspended stream state */
 419         unsigned char reserved[60];     /* must be filled with zero */
 420 };
 421
 422 struct sndrv_pcm_mmap_status {
 423         enum sndrv_pcm_state state;     /* RO: state - SNDRV_PCM_STATE_XXXX */
 424         int pad1;                       /* Needed for 64 bit alignment */
 425         sndrv_pcm_uframes_t hw_ptr;     /* RO: hw ptr (0...boundary-1) */
 426         struct timespec tstamp;         /* Timestamp */
 427         enum sndrv_pcm_state suspended_state; /* RO: suspended stream state */
 428 };
 429
 430 struct sndrv_pcm_mmap_control {
 431         sndrv_pcm_uframes_t appl_ptr;   /* RW: appl ptr (0...boundary-1) */
 432         sndrv_pcm_uframes_t avail_min;  /* RW: min available frames for wakeup */
 433 };
 434
 435 #define SNDRV_PCM_SYNC_PTR_HWSYNC       (1<<0)  /* execute hwsync */
 436 #define SNDRV_PCM_SYNC_PTR_APPL         (1<<1)  /* get appl_ptr from driver (r/w op) */
 437 #define SNDRV_PCM_SYNC_PTR_AVAIL_MIN    (1<<2)  /* get avail_min from driver */
 438
 439 struct sndrv_pcm_sync_ptr {
 440         unsigned int flags;
 441         union {
 442                 struct sndrv_pcm_mmap_status status;
 443                 unsigned char reserved[64];
 444         } s;
 445         union {
 446                 struct sndrv_pcm_mmap_control control;
 447                 unsigned char reserved[64];
 448         } c;
 449 };
 450
 451 struct sndrv_xferi {
 452         sndrv_pcm_sframes_t result;
 453         void __user *buf;
 454         sndrv_pcm_uframes_t frames;
 455 };
 456
 457 struct sndrv_xfern {
 458         sndrv_pcm_sframes_t result;
 459         void __user * __user *bufs;
 460         sndrv_pcm_uframes_t frames;
 461 };
 462
 463 enum {
 464         SNDRV_PCM_IOCTL_PVERSION = _IOR('A', 0x00, int),
 465         SNDRV_PCM_IOCTL_INFO = _IOR('A', 0x01, struct sndrv_pcm_info),
 466         SNDRV_PCM_IOCTL_TSTAMP = _IOW('A', 0x02, int),
 467         SNDRV_PCM_IOCTL_HW_REFINE = _IOWR('A', 0x10, struct sndrv_pcm_hw_params),
 468         SNDRV_PCM_IOCTL_HW_PARAMS = _IOWR('A', 0x11, struct sndrv_pcm_hw_params),
 469         SNDRV_PCM_IOCTL_HW_FREE = _IO('A', 0x12),
 470         SNDRV_PCM_IOCTL_SW_PARAMS = _IOWR('A', 0x13, struct sndrv_pcm_sw_params),
 471         SNDRV_PCM_IOCTL_STATUS = _IOR('A', 0x20, struct sndrv_pcm_status),
 472         SNDRV_PCM_IOCTL_DELAY = _IOR('A', 0x21, sndrv_pcm_sframes_t),
 473         SNDRV_PCM_IOCTL_HWSYNC = _IO('A', 0x22),
 474         SNDRV_PCM_IOCTL_SYNC_PTR = _IOWR('A', 0x23, struct sndrv_pcm_sync_ptr),
 475         SNDRV_PCM_IOCTL_CHANNEL_INFO = _IOR('A', 0x32, struct sndrv_pcm_channel_info),
 476         SNDRV_PCM_IOCTL_PREPARE = _IO('A', 0x40),
 477         SNDRV_PCM_IOCTL_RESET = _IO('A', 0x41),
 478         SNDRV_PCM_IOCTL_START = _IO('A', 0x42),
 479         SNDRV_PCM_IOCTL_DROP = _IO('A', 0x43),
 480         SNDRV_PCM_IOCTL_DRAIN = _IO('A', 0x44),
 481         SNDRV_PCM_IOCTL_PAUSE = _IOW('A', 0x45, int),
 482         SNDRV_PCM_IOCTL_REWIND = _IOW('A', 0x46, sndrv_pcm_uframes_t),
 483         SNDRV_PCM_IOCTL_RESUME = _IO('A', 0x47),
 484         SNDRV_PCM_IOCTL_XRUN = _IO('A', 0x48),
 485         SNDRV_PCM_IOCTL_FORWARD = _IOW('A', 0x49, sndrv_pcm_uframes_t),
 486         SNDRV_PCM_IOCTL_WRITEI_FRAMES = _IOW('A', 0x50, struct sndrv_xferi),
 487         SNDRV_PCM_IOCTL_READI_FRAMES = _IOR('A', 0x51, struct sndrv_xferi),
 488         SNDRV_PCM_IOCTL_WRITEN_FRAMES = _IOW('A', 0x52, struct sndrv_xfern),
 489         SNDRV_PCM_IOCTL_READN_FRAMES = _IOR('A', 0x53, struct sndrv_xfern),
 490         SNDRV_PCM_IOCTL_LINK = _IOW('A', 0x60, int),
 491         SNDRV_PCM_IOCTL_UNLINK = _IO('A', 0x61),
 492 };
 493
 494 /* Trick to make alsa-lib/acinclude.m4 happy */
 495 #define SNDRV_PCM_IOCTL_REWIND SNDRV_PCM_IOCTL_REWIND
 496
 497 /*****************************************************************************
 498  *                                                                           *
 499  *                            MIDI v1.0 interface                            *
 500  *                                                                           *
 501  *****************************************************************************/
 502
 503 /*
 504  *  Raw MIDI section - /dev/snd/midi??
 505  */
 506
 507 #define SNDRV_RAWMIDI_VERSION           SNDRV_PROTOCOL_VERSION(2, 0, 0)
 508
 509 enum sndrv_rawmidi_stream {
 510         SNDRV_RAWMIDI_STREAM_OUTPUT = 0,
 511         SNDRV_RAWMIDI_STREAM_INPUT,
 512         SNDRV_RAWMIDI_STREAM_LAST = SNDRV_RAWMIDI_STREAM_INPUT,
 513 };
 514
 515 #define SNDRV_RAWMIDI_INFO_OUTPUT               0x00000001
 516 #define SNDRV_RAWMIDI_INFO_INPUT                0x00000002
 517 #define SNDRV_RAWMIDI_INFO_DUPLEX               0x00000004
 518
 519 struct sndrv_rawmidi_info {
 520         unsigned int device;            /* RO/WR (control): device number */
 521         unsigned int subdevice;         /* RO/WR (control): subdevice number */
 522         enum sndrv_rawmidi_stream stream; /* WR: stream */
 523         int card;                       /* R: card number */
 524         unsigned int flags;             /* SNDRV_RAWMIDI_INFO_XXXX */
 525         unsigned char id[64];           /* ID (user selectable) */
 526         unsigned char name[80];         /* name of device */
 527         unsigned char subname[32];      /* name of active or selected subdevice */
 528         unsigned int subdevices_count;
 529         unsigned int subdevices_avail;
 530         unsigned char reserved[64];     /* reserved for future use */
 531 };
 532
 533 struct sndrv_rawmidi_params {
 534         enum sndrv_rawmidi_stream stream;
 535         size_t buffer_size;             /* queue size in bytes */
 536         size_t avail_min;               /* minimum avail bytes for wakeup */
 537         unsigned int no_active_sensing: 1; /* do not send active sensing byte in close() */
 538         unsigned char reserved[16];     /* reserved for future use */
 539 };
 540
 541 struct sndrv_rawmidi_status {
 542         enum sndrv_rawmidi_stream stream;
 543         struct timespec tstamp;         /* Timestamp */
 544         size_t avail;                   /* available bytes */
 545         size_t xruns;                   /* count of overruns since last status (in bytes) */
 546         unsigned char reserved[16];     /* reserved for future use */
 547 };
 548
 549 enum {
 550         SNDRV_RAWMIDI_IOCTL_PVERSION = _IOR('W', 0x00, int),
 551         SNDRV_RAWMIDI_IOCTL_INFO = _IOR('W', 0x01, struct sndrv_rawmidi_info),
 552         SNDRV_RAWMIDI_IOCTL_PARAMS = _IOWR('W', 0x10, struct sndrv_rawmidi_params),
 553         SNDRV_RAWMIDI_IOCTL_STATUS = _IOWR('W', 0x20, struct sndrv_rawmidi_status),
 554         SNDRV_RAWMIDI_IOCTL_DROP = _IOW('W', 0x30, int),
 555         SNDRV_RAWMIDI_IOCTL_DRAIN = _IOW('W', 0x31, int),
 556 };
 557
 558 /*
 559  *  Timer section - /dev/snd/timer
 560  */
 561
 562 #define SNDRV_TIMER_VERSION             SNDRV_PROTOCOL_VERSION(2, 0, 2)
 563
 564 enum sndrv_timer_class {
 565         SNDRV_TIMER_CLASS_NONE = -1,
 566         SNDRV_TIMER_CLASS_SLAVE = 0,
 567         SNDRV_TIMER_CLASS_GLOBAL,
 568         SNDRV_TIMER_CLASS_CARD,
 569         SNDRV_TIMER_CLASS_PCM,
 570         SNDRV_TIMER_CLASS_LAST = SNDRV_TIMER_CLASS_PCM,
 571 };
 572
 573 /* slave timer classes */
 574 enum sndrv_timer_slave_class {
 575         SNDRV_TIMER_SCLASS_NONE = 0,
 576         SNDRV_TIMER_SCLASS_APPLICATION,
 577         SNDRV_TIMER_SCLASS_SEQUENCER,           /* alias */
 578         SNDRV_TIMER_SCLASS_OSS_SEQUENCER,       /* alias */
 579         SNDRV_TIMER_SCLASS_LAST = SNDRV_TIMER_SCLASS_OSS_SEQUENCER,
 580 };
 581
 582 /* global timers (device member) */
 583 #define SNDRV_TIMER_GLOBAL_SYSTEM       0
 584 #define SNDRV_TIMER_GLOBAL_RTC          1
 585 #define SNDRV_TIMER_GLOBAL_HPET         2
 586
 587 /* info flags */
 588 #define SNDRV_TIMER_FLG_SLAVE           (1<<0)  /* cannot be controlled */
 589
 590 struct sndrv_timer_id {
 591         enum sndrv_timer_class dev_class;
 592         enum sndrv_timer_slave_class dev_sclass;
 593         int card;
 594         int device;
 595         int subdevice;
 596 };
 597
 598 struct sndrv_timer_ginfo {
 599         struct sndrv_timer_id tid;      /* requested timer ID */
 600         unsigned int flags;             /* timer flags - SNDRV_TIMER_FLG_* */
 601         int card;                       /* card number */
 602         unsigned char id[64];           /* timer identification */
 603         unsigned char name[80];         /* timer name */
 604         unsigned long reserved0;        /* reserved for future use */
 605         unsigned long resolution;       /* average period resolution in ns */
 606         unsigned long resolution_min;   /* minimal period resolution in ns */
 607         unsigned long resolution_max;   /* maximal period resolution in ns */
 608         unsigned int clients;           /* active timer clients */
 609         unsigned char reserved[32];
 610 };
 611
 612 struct sndrv_timer_gparams {
 613         struct sndrv_timer_id tid;      /* requested timer ID */
 614         unsigned long period_num;       /* requested precise period duration (in seconds) - numerator */
 615         unsigned long period_den;       /* requested precise period duration (in seconds) - denominator */
 616         unsigned char reserved[32];
 617 };
 618
 619 struct sndrv_timer_gstatus {
 620         struct sndrv_timer_id tid;      /* requested timer ID */
 621         unsigned long resolution;       /* current period resolution in ns */
 622         unsigned long resolution_num;   /* precise current period resolution (in seconds) - numerator */
 623         unsigned long resolution_den;   /* precise current period resolution (in seconds) - denominator */
 624         unsigned char reserved[32];
 625 };
 626
 627 struct sndrv_timer_select {
 628         struct sndrv_timer_id id;       /* bind to timer ID */
 629         unsigned char reserved[32];     /* reserved */
 630 };
 631
 632 struct sndrv_timer_info {
 633         unsigned int flags;             /* timer flags - SNDRV_TIMER_FLG_* */
 634         int card;                       /* card number */
 635         unsigned char id[64];           /* timer identificator */
 636         unsigned char name[80];         /* timer name */
 637         unsigned long reserved0;        /* reserved for future use */
 638         unsigned long resolution;       /* average period resolution in ns */
 639         unsigned char reserved[64];     /* reserved */
 640 };
 641
 642 #define SNDRV_TIMER_PSFLG_AUTO          (1<<0)  /* auto start, otherwise one-shot */
 643 #define SNDRV_TIMER_PSFLG_EXCLUSIVE     (1<<1)  /* exclusive use, precise start/stop/pause/continue */
 644 #define SNDRV_TIMER_PSFLG_EARLY_EVENT   (1<<2)  /* write early event to the poll queue */
 645
 646 struct sndrv_timer_params {
 647         unsigned int flags;             /* flags - SNDRV_MIXER_PSFLG_* */
 648         unsigned int ticks;             /* requested resolution in ticks */
 649         unsigned int queue_size;        /* total size of queue (32-1024) */
 650         unsigned int reserved0;         /* reserved, was: failure locations */
 651         unsigned int filter;            /* event filter (bitmask of SNDRV_TIMER_EVENT_*) */
 652         unsigned char reserved[60];     /* reserved */
 653 };
 654
 655 struct sndrv_timer_status {
 656         struct timespec tstamp;         /* Timestamp - last update */
 657         unsigned int resolution;        /* current period resolution in ns */
 658         unsigned int lost;              /* counter of master tick lost */
 659         unsigned int overrun;           /* count of read queue overruns */
 660         unsigned int queue;             /* used queue size */
 661         unsigned char reserved[64];     /* reserved */
 662 };
 663
 664 enum {
 665         SNDRV_TIMER_IOCTL_PVERSION = _IOR('T', 0x00, int),
 666         SNDRV_TIMER_IOCTL_NEXT_DEVICE = _IOWR('T', 0x01, struct sndrv_timer_id),
 667         SNDRV_TIMER_IOCTL_TREAD = _IOW('T', 0x02, int),
 668         SNDRV_TIMER_IOCTL_GINFO = _IOWR('T', 0x03, struct sndrv_timer_ginfo),
 669         SNDRV_TIMER_IOCTL_GPARAMS = _IOW('T', 0x04, struct sndrv_timer_gparams),
 670         SNDRV_TIMER_IOCTL_GSTATUS = _IOWR('T', 0x05, struct sndrv_timer_gstatus),
 671         SNDRV_TIMER_IOCTL_SELECT = _IOW('T', 0x10, struct sndrv_timer_select),
 672         SNDRV_TIMER_IOCTL_INFO = _IOR('T', 0x11, struct sndrv_timer_info),
 673         SNDRV_TIMER_IOCTL_PARAMS = _IOW('T', 0x12, struct sndrv_timer_params),
 674         SNDRV_TIMER_IOCTL_STATUS = _IOR('T', 0x14, struct sndrv_timer_status),
 675         SNDRV_TIMER_IOCTL_START = _IO('T', 0x20),
 676         SNDRV_TIMER_IOCTL_STOP = _IO('T', 0x21),
 677         SNDRV_TIMER_IOCTL_CONTINUE = _IO('T', 0x22),
 678         SNDRV_TIMER_IOCTL_PAUSE = _IO('T', 0x23),
 679 };
 680
 681 struct sndrv_timer_read {
 682         unsigned int resolution;
 683         unsigned int ticks;
 684 };
 685
 686 enum sndrv_timer_event {
 687         SNDRV_TIMER_EVENT_RESOLUTION = 0,       /* val = resolution in ns */
 688         SNDRV_TIMER_EVENT_TICK,                 /* val = ticks */
 689         SNDRV_TIMER_EVENT_START,                /* val = resolution in ns */
 690         SNDRV_TIMER_EVENT_STOP,                 /* val = 0 */
 691         SNDRV_TIMER_EVENT_CONTINUE,             /* val = resolution in ns */
 692         SNDRV_TIMER_EVENT_PAUSE,                /* val = 0 */
 693         SNDRV_TIMER_EVENT_EARLY,                /* val = 0, early event */
 694         /* master timer events for slave timer instances */
 695         SNDRV_TIMER_EVENT_MSTART = SNDRV_TIMER_EVENT_START + 10,
 696         SNDRV_TIMER_EVENT_MSTOP = SNDRV_TIMER_EVENT_STOP + 10,
 697         SNDRV_TIMER_EVENT_MCONTINUE = SNDRV_TIMER_EVENT_CONTINUE + 10,
 698         SNDRV_TIMER_EVENT_MPAUSE = SNDRV_TIMER_EVENT_PAUSE + 10,
 699 };
 700
 701 struct sndrv_timer_tread {
 702         enum sndrv_timer_event event;
 703         struct timespec tstamp;
 704         unsigned int val;
 705 };
 706
 707 /****************************************************************************
 708  *                                                                          *
 709  *        Section for driver control interface - /dev/snd/control?          *
 710  *                                                                          *
 711  ****************************************************************************/
 712
 713 #define SNDRV_CTL_VERSION               SNDRV_PROTOCOL_VERSION(2, 0, 3)
 714
 715 struct sndrv_ctl_card_info {
 716         int card;                       /* card number */
 717         int pad;                        /* reserved for future (was type) */
 718         unsigned char id[16];           /* ID of card (user selectable) */
 719         unsigned char driver[16];       /* Driver name */
 720         unsigned char name[32];         /* Short name of soundcard */
 721         unsigned char longname[80];     /* name + info text about soundcard */
 722         unsigned char reserved_[16];    /* reserved for future (was ID of mixer) */
 723         unsigned char mixername[80];    /* visual mixer identification */
 724         unsigned char components[80];   /* card components / fine identification, delimited with one space (AC97 etc..) */
 725         unsigned char reserved[48];     /* reserved for future */
 726 };
 727
 728 enum sndrv_ctl_elem_type {
 729         SNDRV_CTL_ELEM_TYPE_NONE = 0,           /* invalid */
 730         SNDRV_CTL_ELEM_TYPE_BOOLEAN,            /* boolean type */
 731         SNDRV_CTL_ELEM_TYPE_INTEGER,            /* integer type */
 732         SNDRV_CTL_ELEM_TYPE_ENUMERATED,         /* enumerated type */
 733         SNDRV_CTL_ELEM_TYPE_BYTES,              /* byte array */
 734         SNDRV_CTL_ELEM_TYPE_IEC958,             /* IEC958 (S/PDIF) setup */
 735         SNDRV_CTL_ELEM_TYPE_INTEGER64,          /* 64-bit integer type */
 736         SNDRV_CTL_ELEM_TYPE_LAST = SNDRV_CTL_ELEM_TYPE_INTEGER64,
 737 };
 738
 739 enum sndrv_ctl_elem_iface {
 740         SNDRV_CTL_ELEM_IFACE_CARD = 0,          /* global control */
 741         SNDRV_CTL_ELEM_IFACE_HWDEP,             /* hardware dependent device */
 742         SNDRV_CTL_ELEM_IFACE_MIXER,             /* virtual mixer device */
 743         SNDRV_CTL_ELEM_IFACE_PCM,               /* PCM device */
 744         SNDRV_CTL_ELEM_IFACE_RAWMIDI,           /* RawMidi device */
 745         SNDRV_CTL_ELEM_IFACE_TIMER,             /* timer device */
 746         SNDRV_CTL_ELEM_IFACE_SEQUENCER,         /* sequencer client */
 747         SNDRV_CTL_ELEM_IFACE_LAST = SNDRV_CTL_ELEM_IFACE_SEQUENCER,
 748 };
 749
 750 #define SNDRV_CTL_ELEM_ACCESS_READ              (1<<0)
 751 #define SNDRV_CTL_ELEM_ACCESS_WRITE             (1<<1)
 752 #define SNDRV_CTL_ELEM_ACCESS_READWRITE         (SNDRV_CTL_ELEM_ACCESS_READ|SNDRV_CTL_ELEM_ACCESS_WRITE)
 753 #define SNDRV_CTL_ELEM_ACCESS_VOLATILE          (1<<2)  /* control value may be changed without a notification */
 754 #define SNDRV_CTL_ELEM_ACCESS_TIMESTAMP         (1<<2)  /* when was control changed */
 755 #define SNDRV_CTL_ELEM_ACCESS_INACTIVE          (1<<8)  /* control does actually nothing, but may be updated */
 756 #define SNDRV_CTL_ELEM_ACCESS_LOCK              (1<<9)  /* write lock */
 757 #define SNDRV_CTL_ELEM_ACCESS_OWNER             (1<<10) /* write lock owner */
 758 #define SNDRV_CTL_ELEM_ACCESS_USER              (1<<29) /* user space element */
 759 #define SNDRV_CTL_ELEM_ACCESS_DINDIRECT         (1<<30) /* indirect access for matrix dimensions in the info structure */
 760 #define SNDRV_CTL_ELEM_ACCESS_INDIRECT          (1<<31) /* indirect access for element value in the value structure */
 761
 762 /* for further details see the ACPI and PCI power management specification */
 763 #define SNDRV_CTL_POWER_D0              0x0000  /* full On */
 764 #define SNDRV_CTL_POWER_D1              0x0100  /* partial On */
 765 #define SNDRV_CTL_POWER_D2              0x0200  /* partial On */
 766 #define SNDRV_CTL_POWER_D3              0x0300  /* Off */
 767 #define SNDRV_CTL_POWER_D3hot           (SNDRV_CTL_POWER_D3|0x0000)     /* Off, with power */
 768 #define SNDRV_CTL_POWER_D3cold          (SNDRV_CTL_POWER_D3|0x0001)     /* Off, without power */
 769
 770 struct sndrv_ctl_elem_id {
 771         unsigned int numid;             /* numeric identifier, zero = invalid */
 772         enum sndrv_ctl_elem_iface iface; /* interface identifier */
 773         unsigned int device;            /* device/client number */
 774         unsigned int subdevice;         /* subdevice (substream) number */
 775         unsigned char name[44];         /* ASCII name of item */
 776         unsigned int index;             /* index of item */
 777 };
 778
 779 struct sndrv_ctl_elem_list {
 780         unsigned int offset;            /* W: first element ID to get */
 781         unsigned int space;             /* W: count of element IDs to get */
 782         unsigned int used;              /* R: count of element IDs set */
 783         unsigned int count;             /* R: count of all elements */
 784         struct sndrv_ctl_elem_id __user *pids; /* R: IDs */
 785         unsigned char reserved[50];
 786 };
 787
 788 struct sndrv_ctl_elem_info {
 789         struct sndrv_ctl_elem_id id;    /* W: element ID */
 790         enum sndrv_ctl_elem_type type;  /* R: value type - SNDRV_CTL_ELEM_TYPE_* */
 791         unsigned int access;            /* R: value access (bitmask) - SNDRV_CTL_ELEM_ACCESS_* */
 792         unsigned int count;             /* count of values */
 793         pid_t owner;                    /* owner's PID of this control */
 794         union {
 795                 struct {
 796                         long min;               /* R: minimum value */
 797                         long max;               /* R: maximum value */
 798                         long step;              /* R: step (0 variable) */
 799                 } integer;
 800                 struct {
 801                         long long min;          /* R: minimum value */
 802                         long long max;          /* R: maximum value */
 803                         long long step;         /* R: step (0 variable) */
 804                 } integer64;
 805                 struct {
 806                         unsigned int items;     /* R: number of items */
 807                         unsigned int item;      /* W: item number */
 808                         char name[64];          /* R: value name */
 809                 } enumerated;
 810                 unsigned char reserved[128];
 811         } value;
 812         union {
 813                 unsigned short d[4];            /* dimensions */
 814                 unsigned short *d_ptr;          /* indirect */
 815         } dimen;
 816         unsigned char reserved[64-4*sizeof(unsigned short)];
 817 };
 818
 819 struct sndrv_ctl_elem_value {
 820         struct sndrv_ctl_elem_id id;    /* W: element ID */
 821         unsigned int indirect: 1;       /* W: use indirect pointer (xxx_ptr member) */
 822         union {
 823                 union {
 824                         long value[128];
 825                         long *value_ptr;
 826                 } integer;
 827                 union {
 828                         long long value[64];
 829                         long long *value_ptr;
 830                 } integer64;
 831                 union {
 832                         unsigned int item[128];
 833                         unsigned int *item_ptr;
 834                 } enumerated;
 835                 union {
 836                         unsigned char data[512];
 837                         unsigned char *data_ptr;
 838                 } bytes;
 839                 struct sndrv_aes_iec958 iec958;
 840         } value;                /* RO */
 841         struct timespec tstamp;
 842         unsigned char reserved[128-sizeof(struct timespec)];
 843 };
 844
 845 enum {
 846         SNDRV_CTL_IOCTL_PVERSION = _IOR('U', 0x00, int),
 847         SNDRV_CTL_IOCTL_CARD_INFO = _IOR('U', 0x01, struct sndrv_ctl_card_info),
 848         SNDRV_CTL_IOCTL_ELEM_LIST = _IOWR('U', 0x10, struct sndrv_ctl_elem_list),
 849         SNDRV_CTL_IOCTL_ELEM_INFO = _IOWR('U', 0x11, struct sndrv_ctl_elem_info),
 850         SNDRV_CTL_IOCTL_ELEM_READ = _IOWR('U', 0x12, struct sndrv_ctl_elem_value),
 851         SNDRV_CTL_IOCTL_ELEM_WRITE = _IOWR('U', 0x13, struct sndrv_ctl_elem_value),
 852         SNDRV_CTL_IOCTL_ELEM_LOCK = _IOW('U', 0x14, struct sndrv_ctl_elem_id),
 853         SNDRV_CTL_IOCTL_ELEM_UNLOCK = _IOW('U', 0x15, struct sndrv_ctl_elem_id),
 854         SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS = _IOWR('U', 0x16, int),
 855         SNDRV_CTL_IOCTL_ELEM_ADD = _IOWR('U', 0x17, struct sndrv_ctl_elem_info),
 856         SNDRV_CTL_IOCTL_ELEM_REPLACE = _IOWR('U', 0x18, struct sndrv_ctl_elem_info),
 857         SNDRV_CTL_IOCTL_ELEM_REMOVE = _IOWR('U', 0x19, struct sndrv_ctl_elem_id),
 858         SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE = _IOWR('U', 0x20, int),
 859         SNDRV_CTL_IOCTL_HWDEP_INFO = _IOR('U', 0x21, struct sndrv_hwdep_info),
 860         SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE = _IOR('U', 0x30, int),
 861         SNDRV_CTL_IOCTL_PCM_INFO = _IOWR('U', 0x31, struct sndrv_pcm_info),
 862         SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE = _IOW('U', 0x32, int),
 863         SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE = _IOWR('U', 0x40, int),
 864         SNDRV_CTL_IOCTL_RAWMIDI_INFO = _IOWR('U', 0x41, struct sndrv_rawmidi_info),
 865         SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE = _IOW('U', 0x42, int),
 866         SNDRV_CTL_IOCTL_POWER = _IOWR('U', 0xd0, int),
 867         SNDRV_CTL_IOCTL_POWER_STATE = _IOR('U', 0xd1, int),
 868 };
 869
 870 /*
 871  *  Read interface.
 872  */
 873
 874 enum sndrv_ctl_event_type {
 875         SNDRV_CTL_EVENT_ELEM = 0,
 876         SNDRV_CTL_EVENT_LAST = SNDRV_CTL_EVENT_ELEM,
 877 };
 878
 879 #define SNDRV_CTL_EVENT_MASK_VALUE      (1<<0)  /* element value was changed */
 880 #define SNDRV_CTL_EVENT_MASK_INFO       (1<<1)  /* element info was changed */
 881 #define SNDRV_CTL_EVENT_MASK_ADD        (1<<2)  /* element was added */
 882 #define SNDRV_CTL_EVENT_MASK_REMOVE     (~0U)   /* element was removed */
 883
 884 struct sndrv_ctl_event {
 885         enum sndrv_ctl_event_type type; /* event type - SNDRV_CTL_EVENT_* */
 886         union {
 887                 struct {
 888                         unsigned int mask;
 889                         struct sndrv_ctl_elem_id id;
 890                 } elem;
 891                 unsigned char data8[60];
 892         } data;
 893 };
 894
 895 /*
 896  *  Control names
 897  */
 898
 899 #define SNDRV_CTL_NAME_NONE                             ""
 900 #define SNDRV_CTL_NAME_PLAYBACK                         "Playback "
 901 #define SNDRV_CTL_NAME_CAPTURE                          "Capture "
 902
 903 #define SNDRV_CTL_NAME_IEC958_NONE                      ""
 904 #define SNDRV_CTL_NAME_IEC958_SWITCH                    "Switch"
 905 #define SNDRV_CTL_NAME_IEC958_VOLUME                    "Volume"
 906 #define SNDRV_CTL_NAME_IEC958_DEFAULT                   "Default"
 907 #define SNDRV_CTL_NAME_IEC958_MASK                      "Mask"
 908 #define SNDRV_CTL_NAME_IEC958_CON_MASK                  "Con Mask"
 909 #define SNDRV_CTL_NAME_IEC958_PRO_MASK                  "Pro Mask"
 910 #define SNDRV_CTL_NAME_IEC958_PCM_STREAM                "PCM Stream"
 911 #define SNDRV_CTL_NAME_IEC958(expl,direction,what)      "IEC958 " expl SNDRV_CTL_NAME_##direction SNDRV_CTL_NAME_IEC958_##what
 912
 913 /*
 914  *
 915  */
 916
 917 struct sndrv_xferv {
 918         const struct iovec *vector;
 919         unsigned long count;
 920 };
 921
 922 enum {
 923         SNDRV_IOCTL_READV = _IOW('K', 0x00, struct sndrv_xferv),
 924         SNDRV_IOCTL_WRITEV = _IOW('K', 0x01, struct sndrv_xferv),
 925 };
 926
 927 #endif /* __SOUND_ASOUND_H */