include/sound/asound.h

   1 /*
   2  *  Advanced Linux Sound Architecture - ALSA - Driver
   3  *  Copyright (c) 1994-2003 by Jaroslav Kysela <perex@perex.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 #ifdef __KERNEL__
  27 #include <linux/ioctl.h>
  28 #include <linux/types.h>
  29 #include <linux/time.h>
  30 #include <asm/byteorder.h>
  31
  32 #ifdef  __LITTLE_ENDIAN
  33 #define SNDRV_LITTLE_ENDIAN
  34 #else
  35 #ifdef __BIG_ENDIAN
  36 #define SNDRV_BIG_ENDIAN
  37 #else
  38 #error "Unsupported endian..."
  39 #endif
  40 #endif
  41
  42 #endif /* __KERNEL__ **/
  43
  44 /*
  45  *  protocol version
  46  */
  47
  48 #define SNDRV_PROTOCOL_VERSION(major, minor, subminor) (((major)<<16)|((minor)<<8)|(subminor))
  49 #define SNDRV_PROTOCOL_MAJOR(version) (((version)>>16)&0xffff)
  50 #define SNDRV_PROTOCOL_MINOR(version) (((version)>>8)&0xff)
  51 #define SNDRV_PROTOCOL_MICRO(version) ((version)&0xff)
  52 #define SNDRV_PROTOCOL_INCOMPATIBLE(kversion, uversion) \
  53         (SNDRV_PROTOCOL_MAJOR(kversion) != SNDRV_PROTOCOL_MAJOR(uversion) || \
  54          (SNDRV_PROTOCOL_MAJOR(kversion) == SNDRV_PROTOCOL_MAJOR(uversion) && \
  55            SNDRV_PROTOCOL_MINOR(kversion) != SNDRV_PROTOCOL_MINOR(uversion)))
  56
  57 /****************************************************************************
  58  *                                                                          *
  59  *        Digital audio interface                                           *
  60  *                                                                          *
  61  ****************************************************************************/
  62
  63 struct snd_aes_iec958 {
  64         unsigned char status[24];       /* AES/IEC958 channel status bits */
  65         unsigned char subcode[147];     /* AES/IEC958 subcode bits */
  66         unsigned char pad;              /* nothing */
  67         unsigned char dig_subframe[4];  /* AES/IEC958 subframe bits */
  68 };
  69
  70 /****************************************************************************
  71  *                                                                          *
  72  *      Section for driver hardware dependent interface - /dev/snd/hw?      *
  73  *                                                                          *
  74  ****************************************************************************/
  75
  76 #define SNDRV_HWDEP_VERSION             SNDRV_PROTOCOL_VERSION(1, 0, 1)
  77
  78 enum {
  79         SNDRV_HWDEP_IFACE_OPL2 = 0,
  80         SNDRV_HWDEP_IFACE_OPL3,
  81         SNDRV_HWDEP_IFACE_OPL4,
  82         SNDRV_HWDEP_IFACE_SB16CSP,      /* Creative Signal Processor */
  83         SNDRV_HWDEP_IFACE_EMU10K1,      /* FX8010 processor in EMU10K1 chip */
  84         SNDRV_HWDEP_IFACE_YSS225,       /* Yamaha FX processor */
  85         SNDRV_HWDEP_IFACE_ICS2115,      /* Wavetable synth */
  86         SNDRV_HWDEP_IFACE_SSCAPE,       /* Ensoniq SoundScape ISA card (MC68EC000) */
  87         SNDRV_HWDEP_IFACE_VX,           /* Digigram VX cards */
  88         SNDRV_HWDEP_IFACE_MIXART,       /* Digigram miXart cards */
  89         SNDRV_HWDEP_IFACE_USX2Y,        /* Tascam US122, US224 & US428 usb */
  90         SNDRV_HWDEP_IFACE_EMUX_WAVETABLE, /* EmuX wavetable */
  91         SNDRV_HWDEP_IFACE_BLUETOOTH,    /* Bluetooth audio */
  92         SNDRV_HWDEP_IFACE_USX2Y_PCM,    /* Tascam US122, US224 & US428 rawusb pcm */
  93         SNDRV_HWDEP_IFACE_PCXHR,        /* Digigram PCXHR */
  94         SNDRV_HWDEP_IFACE_SB_RC,        /* SB Extigy/Audigy2NX remote control */
  95         SNDRV_HWDEP_IFACE_HDA,          /* HD-audio */
  96
  97         /* Don't forget to change the following: */
  98         SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_SB_RC
  99 };
 100
 101 struct snd_hwdep_info {
 102         unsigned int device;            /* WR: device number */
 103         int card;                       /* R: card number */
 104         unsigned char id[64];           /* ID (user selectable) */
 105         unsigned char name[80];         /* hwdep name */
 106         int iface;                      /* hwdep interface */
 107         unsigned char reserved[64];     /* reserved for future */
 108 };
 109
 110 /* generic DSP loader */
 111 struct snd_hwdep_dsp_status {
 112         unsigned int version;           /* R: driver-specific version */
 113         unsigned char id[32];           /* R: driver-specific ID string */
 114         unsigned int num_dsps;          /* R: number of DSP images to transfer */
 115         unsigned int dsp_loaded;        /* R: bit flags indicating the loaded DSPs */
 116         unsigned int chip_ready;        /* R: 1 = initialization finished */
 117         unsigned char reserved[16];     /* reserved for future use */
 118 };
 119
 120 struct snd_hwdep_dsp_image {
 121         unsigned int index;             /* W: DSP index */
 122         unsigned char name[64];         /* W: ID (e.g. file name) */
 123         unsigned char __user *image;    /* W: binary image */
 124         size_t length;                  /* W: size of image in bytes */
 125         unsigned long driver_data;      /* W: driver-specific data */
 126 };
 127
 128 enum {
 129         SNDRV_HWDEP_IOCTL_PVERSION = _IOR ('H', 0x00, int),
 130         SNDRV_HWDEP_IOCTL_INFO = _IOR ('H', 0x01, struct snd_hwdep_info),
 131         SNDRV_HWDEP_IOCTL_DSP_STATUS = _IOR('H', 0x02, struct snd_hwdep_dsp_status),
 132         SNDRV_HWDEP_IOCTL_DSP_LOAD   = _IOW('H', 0x03, struct snd_hwdep_dsp_image)
 133 };
 134
 135 /*****************************************************************************
 136  *                                                                           *
 137  *             Digital Audio (PCM) interface - /dev/snd/pcm??                *
 138  *                                                                           *
 139  *****************************************************************************/
 140
 141 #define SNDRV_PCM_VERSION               SNDRV_PROTOCOL_VERSION(2, 0, 8)
 142
 143 typedef unsigned long snd_pcm_uframes_t;
 144 typedef signed long snd_pcm_sframes_t;
 145
 146 enum {
 147         SNDRV_PCM_CLASS_GENERIC = 0,    /* standard mono or stereo device */
 148         SNDRV_PCM_CLASS_MULTI,          /* multichannel device */
 149         SNDRV_PCM_CLASS_MODEM,          /* software modem class */
 150         SNDRV_PCM_CLASS_DIGITIZER,      /* digitizer class */
 151         /* Don't forget to change the following: */
 152         SNDRV_PCM_CLASS_LAST = SNDRV_PCM_CLASS_DIGITIZER,
 153 };
 154
 155 enum {
 156         SNDRV_PCM_SUBCLASS_GENERIC_MIX = 0, /* mono or stereo subdevices are mixed together */
 157         SNDRV_PCM_SUBCLASS_MULTI_MIX,   /* multichannel subdevices are mixed together */
 158         /* Don't forget to change the following: */
 159         SNDRV_PCM_SUBCLASS_LAST = SNDRV_PCM_SUBCLASS_MULTI_MIX,
 160 };
 161
 162 enum {
 163         SNDRV_PCM_STREAM_PLAYBACK = 0,
 164         SNDRV_PCM_STREAM_CAPTURE,
 165         SNDRV_PCM_STREAM_LAST = SNDRV_PCM_STREAM_CAPTURE,
 166 };
 167
 168 typedef int __bitwise snd_pcm_access_t;
 169 #define SNDRV_PCM_ACCESS_MMAP_INTERLEAVED       ((__force snd_pcm_access_t) 0) /* interleaved mmap */
 170 #define SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED    ((__force snd_pcm_access_t) 1) /* noninterleaved mmap */
 171 #define SNDRV_PCM_ACCESS_MMAP_COMPLEX           ((__force snd_pcm_access_t) 2) /* complex mmap */
 172 #define SNDRV_PCM_ACCESS_RW_INTERLEAVED         ((__force snd_pcm_access_t) 3) /* readi/writei */
 173 #define SNDRV_PCM_ACCESS_RW_NONINTERLEAVED      ((__force snd_pcm_access_t) 4) /* readn/writen */
 174 #define SNDRV_PCM_ACCESS_LAST           SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
 175
 176 typedef int __bitwise snd_pcm_format_t;
 177 #define SNDRV_PCM_FORMAT_S8     ((__force snd_pcm_format_t) 0)
 178 #define SNDRV_PCM_FORMAT_U8     ((__force snd_pcm_format_t) 1)
 179 #define SNDRV_PCM_FORMAT_S16_LE ((__force snd_pcm_format_t) 2)
 180 #define SNDRV_PCM_FORMAT_S16_BE ((__force snd_pcm_format_t) 3)
 181 #define SNDRV_PCM_FORMAT_U16_LE ((__force snd_pcm_format_t) 4)
 182 #define SNDRV_PCM_FORMAT_U16_BE ((__force snd_pcm_format_t) 5)
 183 #define SNDRV_PCM_FORMAT_S24_LE ((__force snd_pcm_format_t) 6) /* low three bytes */
 184 #define SNDRV_PCM_FORMAT_S24_BE ((__force snd_pcm_format_t) 7) /* low three bytes */
 185 #define SNDRV_PCM_FORMAT_U24_LE ((__force snd_pcm_format_t) 8) /* low three bytes */
 186 #define SNDRV_PCM_FORMAT_U24_BE ((__force snd_pcm_format_t) 9) /* low three bytes */
 187 #define SNDRV_PCM_FORMAT_S32_LE ((__force snd_pcm_format_t) 10)
 188 #define SNDRV_PCM_FORMAT_S32_BE ((__force snd_pcm_format_t) 11)
 189 #define SNDRV_PCM_FORMAT_U32_LE ((__force snd_pcm_format_t) 12)
 190 #define SNDRV_PCM_FORMAT_U32_BE ((__force snd_pcm_format_t) 13)
 191 #define SNDRV_PCM_FORMAT_FLOAT_LE       ((__force snd_pcm_format_t) 14) /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
 192 #define SNDRV_PCM_FORMAT_FLOAT_BE       ((__force snd_pcm_format_t) 15) /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
 193 #define SNDRV_PCM_FORMAT_FLOAT64_LE     ((__force snd_pcm_format_t) 16) /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
 194 #define SNDRV_PCM_FORMAT_FLOAT64_BE     ((__force snd_pcm_format_t) 17) /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
 195 #define SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE ((__force snd_pcm_format_t) 18) /* IEC-958 subframe, Little Endian */
 196 #define SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE ((__force snd_pcm_format_t) 19) /* IEC-958 subframe, Big Endian */
 197 #define SNDRV_PCM_FORMAT_MU_LAW         ((__force snd_pcm_format_t) 20)
 198 #define SNDRV_PCM_FORMAT_A_LAW          ((__force snd_pcm_format_t) 21)
 199 #define SNDRV_PCM_FORMAT_IMA_ADPCM      ((__force snd_pcm_format_t) 22)
 200 #define SNDRV_PCM_FORMAT_MPEG           ((__force snd_pcm_format_t) 23)
 201 #define SNDRV_PCM_FORMAT_GSM            ((__force snd_pcm_format_t) 24)
 202 #define SNDRV_PCM_FORMAT_SPECIAL        ((__force snd_pcm_format_t) 31)
 203 #define SNDRV_PCM_FORMAT_S24_3LE        ((__force snd_pcm_format_t) 32) /* in three bytes */
 204 #define SNDRV_PCM_FORMAT_S24_3BE        ((__force snd_pcm_format_t) 33) /* in three bytes */
 205 #define SNDRV_PCM_FORMAT_U24_3LE        ((__force snd_pcm_format_t) 34) /* in three bytes */
 206 #define SNDRV_PCM_FORMAT_U24_3BE        ((__force snd_pcm_format_t) 35) /* in three bytes */
 207 #define SNDRV_PCM_FORMAT_S20_3LE        ((__force snd_pcm_format_t) 36) /* in three bytes */
 208 #define SNDRV_PCM_FORMAT_S20_3BE        ((__force snd_pcm_format_t) 37) /* in three bytes */
 209 #define SNDRV_PCM_FORMAT_U20_3LE        ((__force snd_pcm_format_t) 38) /* in three bytes */
 210 #define SNDRV_PCM_FORMAT_U20_3BE        ((__force snd_pcm_format_t) 39) /* in three bytes */
 211 #define SNDRV_PCM_FORMAT_S18_3LE        ((__force snd_pcm_format_t) 40) /* in three bytes */
 212 #define SNDRV_PCM_FORMAT_S18_3BE        ((__force snd_pcm_format_t) 41) /* in three bytes */
 213 #define SNDRV_PCM_FORMAT_U18_3LE        ((__force snd_pcm_format_t) 42) /* in three bytes */
 214 #define SNDRV_PCM_FORMAT_U18_3BE        ((__force snd_pcm_format_t) 43) /* in three bytes */
 215 #define SNDRV_PCM_FORMAT_LAST           SNDRV_PCM_FORMAT_U18_3BE
 216
 217 #ifdef SNDRV_LITTLE_ENDIAN
 218 #define SNDRV_PCM_FORMAT_S16            SNDRV_PCM_FORMAT_S16_LE
 219 #define SNDRV_PCM_FORMAT_U16            SNDRV_PCM_FORMAT_U16_LE
 220 #define SNDRV_PCM_FORMAT_S24            SNDRV_PCM_FORMAT_S24_LE
 221 #define SNDRV_PCM_FORMAT_U24            SNDRV_PCM_FORMAT_U24_LE
 222 #define SNDRV_PCM_FORMAT_S32            SNDRV_PCM_FORMAT_S32_LE
 223 #define SNDRV_PCM_FORMAT_U32            SNDRV_PCM_FORMAT_U32_LE
 224 #define SNDRV_PCM_FORMAT_FLOAT          SNDRV_PCM_FORMAT_FLOAT_LE
 225 #define SNDRV_PCM_FORMAT_FLOAT64        SNDRV_PCM_FORMAT_FLOAT64_LE
 226 #define SNDRV_PCM_FORMAT_IEC958_SUBFRAME SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE
 227 #endif
 228 #ifdef SNDRV_BIG_ENDIAN
 229 #define SNDRV_PCM_FORMAT_S16            SNDRV_PCM_FORMAT_S16_BE
 230 #define SNDRV_PCM_FORMAT_U16            SNDRV_PCM_FORMAT_U16_BE
 231 #define SNDRV_PCM_FORMAT_S24            SNDRV_PCM_FORMAT_S24_BE
 232 #define SNDRV_PCM_FORMAT_U24            SNDRV_PCM_FORMAT_U24_BE
 233 #define SNDRV_PCM_FORMAT_S32            SNDRV_PCM_FORMAT_S32_BE
 234 #define SNDRV_PCM_FORMAT_U32            SNDRV_PCM_FORMAT_U32_BE
 235 #define SNDRV_PCM_FORMAT_FLOAT          SNDRV_PCM_FORMAT_FLOAT_BE
 236 #define SNDRV_PCM_FORMAT_FLOAT64        SNDRV_PCM_FORMAT_FLOAT64_BE
 237 #define SNDRV_PCM_FORMAT_IEC958_SUBFRAME SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE
 238 #endif
 239
 240 typedef int __bitwise snd_pcm_subformat_t;
 241 #define SNDRV_PCM_SUBFORMAT_STD         ((__force snd_pcm_subformat_t) 0)
 242 #define SNDRV_PCM_SUBFORMAT_LAST        SNDRV_PCM_SUBFORMAT_STD
 243
 244 #define SNDRV_PCM_INFO_MMAP             0x00000001      /* hardware supports mmap */
 245 #define SNDRV_PCM_INFO_MMAP_VALID       0x00000002      /* period data are valid during transfer */
 246 #define SNDRV_PCM_INFO_DOUBLE           0x00000004      /* Double buffering needed for PCM start/stop */
 247 #define SNDRV_PCM_INFO_BATCH            0x00000010      /* double buffering */
 248 #define SNDRV_PCM_INFO_INTERLEAVED      0x00000100      /* channels are interleaved */
 249 #define SNDRV_PCM_INFO_NONINTERLEAVED   0x00000200      /* channels are not interleaved */
 250 #define SNDRV_PCM_INFO_COMPLEX          0x00000400      /* complex frame organization (mmap only) */
 251 #define SNDRV_PCM_INFO_BLOCK_TRANSFER   0x00010000      /* hardware transfer block of samples */
 252 #define SNDRV_PCM_INFO_OVERRANGE        0x00020000      /* hardware supports ADC (capture) overrange detection */
 253 #define SNDRV_PCM_INFO_RESUME           0x00040000      /* hardware supports stream resume after suspend */
 254 #define SNDRV_PCM_INFO_PAUSE            0x00080000      /* pause ioctl is supported */
 255 #define SNDRV_PCM_INFO_HALF_DUPLEX      0x00100000      /* only half duplex */
 256 #define SNDRV_PCM_INFO_JOINT_DUPLEX     0x00200000      /* playback and capture stream are somewhat correlated */
 257 #define SNDRV_PCM_INFO_SYNC_START       0x00400000      /* pcm support some kind of sync go */
 258
 259 typedef int __bitwise snd_pcm_state_t;
 260 #define SNDRV_PCM_STATE_OPEN            ((__force snd_pcm_state_t) 0) /* stream is open */
 261 #define SNDRV_PCM_STATE_SETUP           ((__force snd_pcm_state_t) 1) /* stream has a setup */
 262 #define SNDRV_PCM_STATE_PREPARED        ((__force snd_pcm_state_t) 2) /* stream is ready to start */
 263 #define SNDRV_PCM_STATE_RUNNING         ((__force snd_pcm_state_t) 3) /* stream is running */
 264 #define SNDRV_PCM_STATE_XRUN            ((__force snd_pcm_state_t) 4) /* stream reached an xrun */
 265 #define SNDRV_PCM_STATE_DRAINING        ((__force snd_pcm_state_t) 5) /* stream is draining */
 266 #define SNDRV_PCM_STATE_PAUSED          ((__force snd_pcm_state_t) 6) /* stream is paused */
 267 #define SNDRV_PCM_STATE_SUSPENDED       ((__force snd_pcm_state_t) 7) /* hardware is suspended */
 268 #define SNDRV_PCM_STATE_DISCONNECTED    ((__force snd_pcm_state_t) 8) /* hardware is disconnected */
 269 #define SNDRV_PCM_STATE_LAST            SNDRV_PCM_STATE_DISCONNECTED
 270
 271 enum {
 272         SNDRV_PCM_MMAP_OFFSET_DATA = 0x00000000,
 273         SNDRV_PCM_MMAP_OFFSET_STATUS = 0x80000000,
 274         SNDRV_PCM_MMAP_OFFSET_CONTROL = 0x81000000,
 275 };
 276
 277 union snd_pcm_sync_id {
 278         unsigned char id[16];
 279         unsigned short id16[8];
 280         unsigned int id32[4];
 281 };
 282
 283 struct snd_pcm_info {
 284         unsigned int device;            /* RO/WR (control): device number */
 285         unsigned int subdevice;         /* RO/WR (control): subdevice number */
 286         int stream;                     /* RO/WR (control): stream direction */
 287         int card;                       /* R: card number */
 288         unsigned char id[64];           /* ID (user selectable) */
 289         unsigned char name[80];         /* name of this device */
 290         unsigned char subname[32];      /* subdevice name */
 291         int dev_class;                  /* SNDRV_PCM_CLASS_* */
 292         int dev_subclass;               /* SNDRV_PCM_SUBCLASS_* */
 293         unsigned int subdevices_count;
 294         unsigned int subdevices_avail;
 295         union snd_pcm_sync_id sync;     /* hardware synchronization ID */
 296         unsigned char reserved[64];     /* reserved for future... */
 297 };
 298
 299 typedef int __bitwise snd_pcm_hw_param_t;
 300 #define SNDRV_PCM_HW_PARAM_ACCESS       ((__force snd_pcm_hw_param_t) 0) /* Access type */
 301 #define SNDRV_PCM_HW_PARAM_FORMAT       ((__force snd_pcm_hw_param_t) 1) /* Format */
 302 #define SNDRV_PCM_HW_PARAM_SUBFORMAT    ((__force snd_pcm_hw_param_t) 2) /* Subformat */
 303 #define SNDRV_PCM_HW_PARAM_FIRST_MASK   SNDRV_PCM_HW_PARAM_ACCESS
 304 #define SNDRV_PCM_HW_PARAM_LAST_MASK    SNDRV_PCM_HW_PARAM_SUBFORMAT
 305
 306 #define SNDRV_PCM_HW_PARAM_SAMPLE_BITS  ((__force snd_pcm_hw_param_t) 8) /* Bits per sample */
 307 #define SNDRV_PCM_HW_PARAM_FRAME_BITS   ((__force snd_pcm_hw_param_t) 9) /* Bits per frame */
 308 #define SNDRV_PCM_HW_PARAM_CHANNELS     ((__force snd_pcm_hw_param_t) 10) /* Channels */
 309 #define SNDRV_PCM_HW_PARAM_RATE         ((__force snd_pcm_hw_param_t) 11) /* Approx rate */
 310 #define SNDRV_PCM_HW_PARAM_PERIOD_TIME  ((__force snd_pcm_hw_param_t) 12) /* Approx distance between interrupts in us */
 311 #define SNDRV_PCM_HW_PARAM_PERIOD_SIZE  ((__force snd_pcm_hw_param_t) 13) /* Approx frames between interrupts */
 312 #define SNDRV_PCM_HW_PARAM_PERIOD_BYTES ((__force snd_pcm_hw_param_t) 14) /* Approx bytes between interrupts */
 313 #define SNDRV_PCM_HW_PARAM_PERIODS      ((__force snd_pcm_hw_param_t) 15) /* Approx interrupts per buffer */
 314 #define SNDRV_PCM_HW_PARAM_BUFFER_TIME  ((__force snd_pcm_hw_param_t) 16) /* Approx duration of buffer in us */
 315 #define SNDRV_PCM_HW_PARAM_BUFFER_SIZE  ((__force snd_pcm_hw_param_t) 17) /* Size of buffer in frames */
 316 #define SNDRV_PCM_HW_PARAM_BUFFER_BYTES ((__force snd_pcm_hw_param_t) 18) /* Size of buffer in bytes */
 317 #define SNDRV_PCM_HW_PARAM_TICK_TIME    ((__force snd_pcm_hw_param_t) 19) /* Approx tick duration in us */
 318 #define SNDRV_PCM_HW_PARAM_FIRST_INTERVAL       SNDRV_PCM_HW_PARAM_SAMPLE_BITS
 319 #define SNDRV_PCM_HW_PARAM_LAST_INTERVAL        SNDRV_PCM_HW_PARAM_TICK_TIME
 320
 321 #define SNDRV_PCM_HW_PARAMS_NORESAMPLE          (1<<0)  /* avoid rate resampling */
 322
 323 struct snd_interval {
 324         unsigned int min, max;
 325         unsigned int openmin:1,
 326                      openmax:1,
 327                      integer:1,
 328                      empty:1;
 329 };
 330
 331 #define SNDRV_MASK_MAX  256
 332
 333 struct snd_mask {
 334         u_int32_t bits[(SNDRV_MASK_MAX+31)/32];
 335 };
 336
 337 struct snd_pcm_hw_params {
 338         unsigned int flags;
 339         struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
 340                                SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
 341         struct snd_mask mres[5];        /* reserved masks */
 342         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
 343                                         SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
 344         struct snd_interval ires[9];    /* reserved intervals */
 345         unsigned int rmask;             /* W: requested masks */
 346         unsigned int cmask;             /* R: changed masks */
 347         unsigned int info;              /* R: Info flags for returned setup */
 348         unsigned int msbits;            /* R: used most significant bits */
 349         unsigned int rate_num;          /* R: rate numerator */
 350         unsigned int rate_den;          /* R: rate denominator */
 351         snd_pcm_uframes_t fifo_size;    /* R: chip FIFO size in frames */
 352         unsigned char reserved[64];     /* reserved for future */
 353 };
 354
 355 enum {
 356         SNDRV_PCM_TSTAMP_NONE = 0,
 357         SNDRV_PCM_TSTAMP_MMAP,
 358         SNDRV_PCM_TSTAMP_LAST = SNDRV_PCM_TSTAMP_MMAP,
 359 };
 360
 361 struct snd_pcm_sw_params {
 362         int tstamp_mode;                        /* timestamp mode */
 363         unsigned int period_step;
 364         unsigned int sleep_min;                 /* min ticks to sleep */
 365         snd_pcm_uframes_t avail_min;            /* min avail frames for wakeup */
 366         snd_pcm_uframes_t xfer_align;           /* xfer size need to be a multiple */
 367         snd_pcm_uframes_t start_threshold;      /* min hw_avail frames for automatic start */
 368         snd_pcm_uframes_t stop_threshold;       /* min avail frames for automatic stop */
 369         snd_pcm_uframes_t silence_threshold;    /* min distance from noise for silence filling */
 370         snd_pcm_uframes_t silence_size;         /* silence block size */
 371         snd_pcm_uframes_t boundary;             /* pointers wrap point */
 372         unsigned char reserved[64];             /* reserved for future */
 373 };
 374
 375 struct snd_pcm_channel_info {
 376         unsigned int channel;
 377         off_t offset;                   /* mmap offset */
 378         unsigned int first;             /* offset to first sample in bits */
 379         unsigned int step;              /* samples distance in bits */
 380 };
 381
 382 struct snd_pcm_status {
 383         snd_pcm_state_t state;          /* stream state */
 384         struct timespec trigger_tstamp; /* time when stream was started/stopped/paused */
 385         struct timespec tstamp;         /* reference timestamp */
 386         snd_pcm_uframes_t appl_ptr;     /* appl ptr */
 387         snd_pcm_uframes_t hw_ptr;       /* hw ptr */
 388         snd_pcm_sframes_t delay;        /* current delay in frames */
 389         snd_pcm_uframes_t avail;        /* number of frames available */
 390         snd_pcm_uframes_t avail_max;    /* max frames available on hw since last status */
 391         snd_pcm_uframes_t overrange;    /* count of ADC (capture) overrange detections from last status */
 392         snd_pcm_state_t suspended_state; /* suspended stream state */
 393         unsigned char reserved[60];     /* must be filled with zero */
 394 };
 395
 396 struct snd_pcm_mmap_status {
 397         snd_pcm_state_t state;          /* RO: state - SNDRV_PCM_STATE_XXXX */
 398         int pad1;                       /* Needed for 64 bit alignment */
 399         snd_pcm_uframes_t hw_ptr;       /* RO: hw ptr (0...boundary-1) */
 400         struct timespec tstamp;         /* Timestamp */
 401         snd_pcm_state_t suspended_state; /* RO: suspended stream state */
 402 };
 403
 404 struct snd_pcm_mmap_control {
 405         snd_pcm_uframes_t appl_ptr;     /* RW: appl ptr (0...boundary-1) */
 406         snd_pcm_uframes_t avail_min;    /* RW: min available frames for wakeup */
 407 };
 408
 409 #define SNDRV_PCM_SYNC_PTR_HWSYNC       (1<<0)  /* execute hwsync */
 410 #define SNDRV_PCM_SYNC_PTR_APPL         (1<<1)  /* get appl_ptr from driver (r/w op) */
 411 #define SNDRV_PCM_SYNC_PTR_AVAIL_MIN    (1<<2)  /* get avail_min from driver */
 412
 413 struct snd_pcm_sync_ptr {
 414         unsigned int flags;
 415         union {
 416                 struct snd_pcm_mmap_status status;
 417                 unsigned char reserved[64];
 418         } s;
 419         union {
 420                 struct snd_pcm_mmap_control control;
 421                 unsigned char reserved[64];
 422         } c;
 423 };
 424
 425 struct snd_xferi {
 426         snd_pcm_sframes_t result;
 427         void __user *buf;
 428         snd_pcm_uframes_t frames;
 429 };
 430
 431 struct snd_xfern {
 432         snd_pcm_sframes_t result;
 433         void __user * __user *bufs;
 434         snd_pcm_uframes_t frames;
 435 };
 436
 437 enum {
 438         SNDRV_PCM_IOCTL_PVERSION = _IOR('A', 0x00, int),
 439         SNDRV_PCM_IOCTL_INFO = _IOR('A', 0x01, struct snd_pcm_info),
 440         SNDRV_PCM_IOCTL_TSTAMP = _IOW('A', 0x02, int),
 441         SNDRV_PCM_IOCTL_HW_REFINE = _IOWR('A', 0x10, struct snd_pcm_hw_params),
 442         SNDRV_PCM_IOCTL_HW_PARAMS = _IOWR('A', 0x11, struct snd_pcm_hw_params),
 443         SNDRV_PCM_IOCTL_HW_FREE = _IO('A', 0x12),
 444         SNDRV_PCM_IOCTL_SW_PARAMS = _IOWR('A', 0x13, struct snd_pcm_sw_params),
 445         SNDRV_PCM_IOCTL_STATUS = _IOR('A', 0x20, struct snd_pcm_status),
 446         SNDRV_PCM_IOCTL_DELAY = _IOR('A', 0x21, snd_pcm_sframes_t),
 447         SNDRV_PCM_IOCTL_HWSYNC = _IO('A', 0x22),
 448         SNDRV_PCM_IOCTL_SYNC_PTR = _IOWR('A', 0x23, struct snd_pcm_sync_ptr),
 449         SNDRV_PCM_IOCTL_CHANNEL_INFO = _IOR('A', 0x32, struct snd_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, snd_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, snd_pcm_uframes_t),
 460         SNDRV_PCM_IOCTL_WRITEI_FRAMES = _IOW('A', 0x50, struct snd_xferi),
 461         SNDRV_PCM_IOCTL_READI_FRAMES = _IOR('A', 0x51, struct snd_xferi),
 462         SNDRV_PCM_IOCTL_WRITEN_FRAMES = _IOW('A', 0x52, struct snd_xfern),
 463         SNDRV_PCM_IOCTL_READN_FRAMES = _IOR('A', 0x53, struct snd_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 {
 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 snd_rawmidi_info {
 494         unsigned int device;            /* RO/WR (control): device number */
 495         unsigned int subdevice;         /* RO/WR (control): subdevice number */
 496         int 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 snd_rawmidi_params {
 508         int 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 snd_rawmidi_status {
 516         int 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 snd_rawmidi_info),
 526         SNDRV_RAWMIDI_IOCTL_PARAMS = _IOWR('W', 0x10, struct snd_rawmidi_params),
 527         SNDRV_RAWMIDI_IOCTL_STATUS = _IOWR('W', 0x20, struct snd_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, 5)
 537
 538 enum {
 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 {
 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 #define SNDRV_TIMER_GLOBAL_HPET         2
 560
 561 /* info flags */
 562 #define SNDRV_TIMER_FLG_SLAVE           (1<<0)  /* cannot be controlled */
 563
 564 struct snd_timer_id {
 565         int dev_class;
 566         int dev_sclass;
 567         int card;
 568         int device;
 569         int subdevice;
 570 };
 571
 572 struct snd_timer_ginfo {
 573         struct snd_timer_id tid;        /* requested timer ID */
 574         unsigned int flags;             /* timer flags - SNDRV_TIMER_FLG_* */
 575         int card;                       /* card number */
 576         unsigned char id[64];           /* timer identification */
 577         unsigned char name[80];         /* timer name */
 578         unsigned long reserved0;        /* reserved for future use */
 579         unsigned long resolution;       /* average period resolution in ns */
 580         unsigned long resolution_min;   /* minimal period resolution in ns */
 581         unsigned long resolution_max;   /* maximal period resolution in ns */
 582         unsigned int clients;           /* active timer clients */
 583         unsigned char reserved[32];
 584 };
 585
 586 struct snd_timer_gparams {
 587         struct snd_timer_id tid;        /* requested timer ID */
 588         unsigned long period_num;       /* requested precise period duration (in seconds) - numerator */
 589         unsigned long period_den;       /* requested precise period duration (in seconds) - denominator */
 590         unsigned char reserved[32];
 591 };
 592
 593 struct snd_timer_gstatus {
 594         struct snd_timer_id tid;        /* requested timer ID */
 595         unsigned long resolution;       /* current period resolution in ns */
 596         unsigned long resolution_num;   /* precise current period resolution (in seconds) - numerator */
 597         unsigned long resolution_den;   /* precise current period resolution (in seconds) - denominator */
 598         unsigned char reserved[32];
 599 };
 600
 601 struct snd_timer_select {
 602         struct snd_timer_id id; /* bind to timer ID */
 603         unsigned char reserved[32];     /* reserved */
 604 };
 605
 606 struct snd_timer_info {
 607         unsigned int flags;             /* timer flags - SNDRV_TIMER_FLG_* */
 608         int card;                       /* card number */
 609         unsigned char id[64];           /* timer identificator */
 610         unsigned char name[80];         /* timer name */
 611         unsigned long reserved0;        /* reserved for future use */
 612         unsigned long resolution;       /* average period resolution in ns */
 613         unsigned char reserved[64];     /* reserved */
 614 };
 615
 616 #define SNDRV_TIMER_PSFLG_AUTO          (1<<0)  /* auto start, otherwise one-shot */
 617 #define SNDRV_TIMER_PSFLG_EXCLUSIVE     (1<<1)  /* exclusive use, precise start/stop/pause/continue */
 618 #define SNDRV_TIMER_PSFLG_EARLY_EVENT   (1<<2)  /* write early event to the poll queue */
 619
 620 struct snd_timer_params {
 621         unsigned int flags;             /* flags - SNDRV_MIXER_PSFLG_* */
 622         unsigned int ticks;             /* requested resolution in ticks */
 623         unsigned int queue_size;        /* total size of queue (32-1024) */
 624         unsigned int reserved0;         /* reserved, was: failure locations */
 625         unsigned int filter;            /* event filter (bitmask of SNDRV_TIMER_EVENT_*) */
 626         unsigned char reserved[60];     /* reserved */
 627 };
 628
 629 struct snd_timer_status {
 630         struct timespec tstamp;         /* Timestamp - last update */
 631         unsigned int resolution;        /* current period resolution in ns */
 632         unsigned int lost;              /* counter of master tick lost */
 633         unsigned int overrun;           /* count of read queue overruns */
 634         unsigned int queue;             /* used queue size */
 635         unsigned char reserved[64];     /* reserved */
 636 };
 637
 638 enum {
 639         SNDRV_TIMER_IOCTL_PVERSION = _IOR('T', 0x00, int),
 640         SNDRV_TIMER_IOCTL_NEXT_DEVICE = _IOWR('T', 0x01, struct snd_timer_id),
 641         SNDRV_TIMER_IOCTL_TREAD = _IOW('T', 0x02, int),
 642         SNDRV_TIMER_IOCTL_GINFO = _IOWR('T', 0x03, struct snd_timer_ginfo),
 643         SNDRV_TIMER_IOCTL_GPARAMS = _IOW('T', 0x04, struct snd_timer_gparams),
 644         SNDRV_TIMER_IOCTL_GSTATUS = _IOWR('T', 0x05, struct snd_timer_gstatus),
 645         SNDRV_TIMER_IOCTL_SELECT = _IOW('T', 0x10, struct snd_timer_select),
 646         SNDRV_TIMER_IOCTL_INFO = _IOR('T', 0x11, struct snd_timer_info),
 647         SNDRV_TIMER_IOCTL_PARAMS = _IOW('T', 0x12, struct snd_timer_params),
 648         SNDRV_TIMER_IOCTL_STATUS = _IOR('T', 0x14, struct snd_timer_status),
 649         /* The following four ioctls are changed since 1.0.9 due to confliction */
 650         SNDRV_TIMER_IOCTL_START = _IO('T', 0xa0),
 651         SNDRV_TIMER_IOCTL_STOP = _IO('T', 0xa1),
 652         SNDRV_TIMER_IOCTL_CONTINUE = _IO('T', 0xa2),
 653         SNDRV_TIMER_IOCTL_PAUSE = _IO('T', 0xa3),
 654 };
 655
 656 struct snd_timer_read {
 657         unsigned int resolution;
 658         unsigned int ticks;
 659 };
 660
 661 enum {
 662         SNDRV_TIMER_EVENT_RESOLUTION = 0,       /* val = resolution in ns */
 663         SNDRV_TIMER_EVENT_TICK,                 /* val = ticks */
 664         SNDRV_TIMER_EVENT_START,                /* val = resolution in ns */
 665         SNDRV_TIMER_EVENT_STOP,                 /* val = 0 */
 666         SNDRV_TIMER_EVENT_CONTINUE,             /* val = resolution in ns */
 667         SNDRV_TIMER_EVENT_PAUSE,                /* val = 0 */
 668         SNDRV_TIMER_EVENT_EARLY,                /* val = 0, early event */
 669         SNDRV_TIMER_EVENT_SUSPEND,              /* val = 0 */
 670         SNDRV_TIMER_EVENT_RESUME,               /* val = resolution in ns */
 671         /* master timer events for slave timer instances */
 672         SNDRV_TIMER_EVENT_MSTART = SNDRV_TIMER_EVENT_START + 10,
 673         SNDRV_TIMER_EVENT_MSTOP = SNDRV_TIMER_EVENT_STOP + 10,
 674         SNDRV_TIMER_EVENT_MCONTINUE = SNDRV_TIMER_EVENT_CONTINUE + 10,
 675         SNDRV_TIMER_EVENT_MPAUSE = SNDRV_TIMER_EVENT_PAUSE + 10,
 676         SNDRV_TIMER_EVENT_MSUSPEND = SNDRV_TIMER_EVENT_SUSPEND + 10,
 677         SNDRV_TIMER_EVENT_MRESUME = SNDRV_TIMER_EVENT_RESUME + 10,
 678 };
 679
 680 struct snd_timer_tread {
 681         int event;
 682         struct timespec tstamp;
 683         unsigned int val;
 684 };
 685
 686 /****************************************************************************
 687  *                                                                          *
 688  *        Section for driver control interface - /dev/snd/control?          *
 689  *                                                                          *
 690  ****************************************************************************/
 691
 692 #define SNDRV_CTL_VERSION               SNDRV_PROTOCOL_VERSION(2, 0, 4)
 693
 694 struct snd_ctl_card_info {
 695         int card;                       /* card number */
 696         int pad;                        /* reserved for future (was type) */
 697         unsigned char id[16];           /* ID of card (user selectable) */
 698         unsigned char driver[16];       /* Driver name */
 699         unsigned char name[32];         /* Short name of soundcard */
 700         unsigned char longname[80];     /* name + info text about soundcard */
 701         unsigned char reserved_[16];    /* reserved for future (was ID of mixer) */
 702         unsigned char mixername[80];    /* visual mixer identification */
 703         unsigned char components[80];   /* card components / fine identification, delimited with one space (AC97 etc..) */
 704         unsigned char reserved[48];     /* reserved for future */
 705 };
 706
 707 typedef int __bitwise snd_ctl_elem_type_t;
 708 #define SNDRV_CTL_ELEM_TYPE_NONE        ((__force snd_ctl_elem_type_t) 0) /* invalid */
 709 #define SNDRV_CTL_ELEM_TYPE_BOOLEAN     ((__force snd_ctl_elem_type_t) 1) /* boolean type */
 710 #define SNDRV_CTL_ELEM_TYPE_INTEGER     ((__force snd_ctl_elem_type_t) 2) /* integer type */
 711 #define SNDRV_CTL_ELEM_TYPE_ENUMERATED  ((__force snd_ctl_elem_type_t) 3) /* enumerated type */
 712 #define SNDRV_CTL_ELEM_TYPE_BYTES       ((__force snd_ctl_elem_type_t) 4) /* byte array */
 713 #define SNDRV_CTL_ELEM_TYPE_IEC958      ((__force snd_ctl_elem_type_t) 5) /* IEC958 (S/PDIF) setup */
 714 #define SNDRV_CTL_ELEM_TYPE_INTEGER64   ((__force snd_ctl_elem_type_t) 6) /* 64-bit integer type */
 715 #define SNDRV_CTL_ELEM_TYPE_LAST        SNDRV_CTL_ELEM_TYPE_INTEGER64
 716
 717 typedef int __bitwise snd_ctl_elem_iface_t;
 718 #define SNDRV_CTL_ELEM_IFACE_CARD       ((__force snd_ctl_elem_iface_t) 0) /* global control */
 719 #define SNDRV_CTL_ELEM_IFACE_HWDEP      ((__force snd_ctl_elem_iface_t) 1) /* hardware dependent device */
 720 #define SNDRV_CTL_ELEM_IFACE_MIXER      ((__force snd_ctl_elem_iface_t) 2) /* virtual mixer device */
 721 #define SNDRV_CTL_ELEM_IFACE_PCM        ((__force snd_ctl_elem_iface_t) 3) /* PCM device */
 722 #define SNDRV_CTL_ELEM_IFACE_RAWMIDI    ((__force snd_ctl_elem_iface_t) 4) /* RawMidi device */
 723 #define SNDRV_CTL_ELEM_IFACE_TIMER      ((__force snd_ctl_elem_iface_t) 5) /* timer device */
 724 #define SNDRV_CTL_ELEM_IFACE_SEQUENCER  ((__force snd_ctl_elem_iface_t) 6) /* sequencer client */
 725 #define SNDRV_CTL_ELEM_IFACE_LAST       SNDRV_CTL_ELEM_IFACE_SEQUENCER
 726
 727 #define SNDRV_CTL_ELEM_ACCESS_READ              (1<<0)
 728 #define SNDRV_CTL_ELEM_ACCESS_WRITE             (1<<1)
 729 #define SNDRV_CTL_ELEM_ACCESS_READWRITE         (SNDRV_CTL_ELEM_ACCESS_READ|SNDRV_CTL_ELEM_ACCESS_WRITE)
 730 #define SNDRV_CTL_ELEM_ACCESS_VOLATILE          (1<<2)  /* control value may be changed without a notification */
 731 #define SNDRV_CTL_ELEM_ACCESS_TIMESTAMP         (1<<3)  /* when was control changed */
 732 #define SNDRV_CTL_ELEM_ACCESS_TLV_READ          (1<<4)  /* TLV read is possible */
 733 #define SNDRV_CTL_ELEM_ACCESS_TLV_WRITE         (1<<5)  /* TLV write is possible */
 734 #define SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE     (SNDRV_CTL_ELEM_ACCESS_TLV_READ|SNDRV_CTL_ELEM_ACCESS_TLV_WRITE)
 735 #define SNDRV_CTL_ELEM_ACCESS_TLV_COMMAND       (1<<6)  /* TLV command is possible */
 736 #define SNDRV_CTL_ELEM_ACCESS_INACTIVE          (1<<8)  /* control does actually nothing, but may be updated */
 737 #define SNDRV_CTL_ELEM_ACCESS_LOCK              (1<<9)  /* write lock */
 738 #define SNDRV_CTL_ELEM_ACCESS_OWNER             (1<<10) /* write lock owner */
 739 #define SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK      (1<<28) /* kernel use a TLV callback */
 740 #define SNDRV_CTL_ELEM_ACCESS_USER              (1<<29) /* user space element */
 741 #define SNDRV_CTL_ELEM_ACCESS_DINDIRECT         (1<<30) /* indirect access for matrix dimensions in the info structure */
 742 #define SNDRV_CTL_ELEM_ACCESS_INDIRECT          (1<<31) /* indirect access for element value in the value structure */
 743
 744 /* for further details see the ACPI and PCI power management specification */
 745 #define SNDRV_CTL_POWER_D0              0x0000  /* full On */
 746 #define SNDRV_CTL_POWER_D1              0x0100  /* partial On */
 747 #define SNDRV_CTL_POWER_D2              0x0200  /* partial On */
 748 #define SNDRV_CTL_POWER_D3              0x0300  /* Off */
 749 #define SNDRV_CTL_POWER_D3hot           (SNDRV_CTL_POWER_D3|0x0000)     /* Off, with power */
 750 #define SNDRV_CTL_POWER_D3cold          (SNDRV_CTL_POWER_D3|0x0001)     /* Off, without power */
 751
 752 struct snd_ctl_elem_id {
 753         unsigned int numid;             /* numeric identifier, zero = invalid */
 754         snd_ctl_elem_iface_t iface;     /* interface identifier */
 755         unsigned int device;            /* device/client number */
 756         unsigned int subdevice;         /* subdevice (substream) number */
 757         unsigned char name[44];         /* ASCII name of item */
 758         unsigned int index;             /* index of item */
 759 };
 760
 761 struct snd_ctl_elem_list {
 762         unsigned int offset;            /* W: first element ID to get */
 763         unsigned int space;             /* W: count of element IDs to get */
 764         unsigned int used;              /* R: count of element IDs set */
 765         unsigned int count;             /* R: count of all elements */
 766         struct snd_ctl_elem_id __user *pids; /* R: IDs */
 767         unsigned char reserved[50];
 768 };
 769
 770 struct snd_ctl_elem_info {
 771         struct snd_ctl_elem_id id;      /* W: element ID */
 772         snd_ctl_elem_type_t type;       /* R: value type - SNDRV_CTL_ELEM_TYPE_* */
 773         unsigned int access;            /* R: value access (bitmask) - SNDRV_CTL_ELEM_ACCESS_* */
 774         unsigned int count;             /* count of values */
 775         pid_t owner;                    /* owner's PID of this control */
 776         union {
 777                 struct {
 778                         long min;               /* R: minimum value */
 779                         long max;               /* R: maximum value */
 780                         long step;              /* R: step (0 variable) */
 781                 } integer;
 782                 struct {
 783                         long long min;          /* R: minimum value */
 784                         long long max;          /* R: maximum value */
 785                         long long step;         /* R: step (0 variable) */
 786                 } integer64;
 787                 struct {
 788                         unsigned int items;     /* R: number of items */
 789                         unsigned int item;      /* W: item number */
 790                         char name[64];          /* R: value name */
 791                 } enumerated;
 792                 unsigned char reserved[128];
 793         } value;
 794         union {
 795                 unsigned short d[4];            /* dimensions */
 796                 unsigned short *d_ptr;          /* indirect */
 797         } dimen;
 798         unsigned char reserved[64-4*sizeof(unsigned short)];
 799 };
 800
 801 struct snd_ctl_elem_value {
 802         struct snd_ctl_elem_id id;      /* W: element ID */
 803         unsigned int indirect: 1;       /* W: use indirect pointer (xxx_ptr member) */
 804         union {
 805                 union {
 806                         long value[128];
 807                         long *value_ptr;
 808                 } integer;
 809                 union {
 810                         long long value[64];
 811                         long long *value_ptr;
 812                 } integer64;
 813                 union {
 814                         unsigned int item[128];
 815                         unsigned int *item_ptr;
 816                 } enumerated;
 817                 union {
 818                         unsigned char data[512];
 819                         unsigned char *data_ptr;
 820                 } bytes;
 821                 struct snd_aes_iec958 iec958;
 822         } value;                /* RO */
 823         struct timespec tstamp;
 824         unsigned char reserved[128-sizeof(struct timespec)];
 825 };
 826
 827 struct snd_ctl_tlv {
 828         unsigned int numid;     /* control element numeric identification */
 829         unsigned int length;    /* in bytes aligned to 4 */
 830         unsigned int tlv[0];    /* first TLV */
 831 };
 832
 833 enum {
 834         SNDRV_CTL_IOCTL_PVERSION = _IOR('U', 0x00, int),
 835         SNDRV_CTL_IOCTL_CARD_INFO = _IOR('U', 0x01, struct snd_ctl_card_info),
 836         SNDRV_CTL_IOCTL_ELEM_LIST = _IOWR('U', 0x10, struct snd_ctl_elem_list),
 837         SNDRV_CTL_IOCTL_ELEM_INFO = _IOWR('U', 0x11, struct snd_ctl_elem_info),
 838         SNDRV_CTL_IOCTL_ELEM_READ = _IOWR('U', 0x12, struct snd_ctl_elem_value),
 839         SNDRV_CTL_IOCTL_ELEM_WRITE = _IOWR('U', 0x13, struct snd_ctl_elem_value),
 840         SNDRV_CTL_IOCTL_ELEM_LOCK = _IOW('U', 0x14, struct snd_ctl_elem_id),
 841         SNDRV_CTL_IOCTL_ELEM_UNLOCK = _IOW('U', 0x15, struct snd_ctl_elem_id),
 842         SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS = _IOWR('U', 0x16, int),
 843         SNDRV_CTL_IOCTL_ELEM_ADD = _IOWR('U', 0x17, struct snd_ctl_elem_info),
 844         SNDRV_CTL_IOCTL_ELEM_REPLACE = _IOWR('U', 0x18, struct snd_ctl_elem_info),
 845         SNDRV_CTL_IOCTL_ELEM_REMOVE = _IOWR('U', 0x19, struct snd_ctl_elem_id),
 846         SNDRV_CTL_IOCTL_TLV_READ = _IOWR('U', 0x1a, struct snd_ctl_tlv),
 847         SNDRV_CTL_IOCTL_TLV_WRITE = _IOWR('U', 0x1b, struct snd_ctl_tlv),
 848         SNDRV_CTL_IOCTL_TLV_COMMAND = _IOWR('U', 0x1c, struct snd_ctl_tlv),
 849         SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE = _IOWR('U', 0x20, int),
 850         SNDRV_CTL_IOCTL_HWDEP_INFO = _IOR('U', 0x21, struct snd_hwdep_info),
 851         SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE = _IOR('U', 0x30, int),
 852         SNDRV_CTL_IOCTL_PCM_INFO = _IOWR('U', 0x31, struct snd_pcm_info),
 853         SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE = _IOW('U', 0x32, int),
 854         SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE = _IOWR('U', 0x40, int),
 855         SNDRV_CTL_IOCTL_RAWMIDI_INFO = _IOWR('U', 0x41, struct snd_rawmidi_info),
 856         SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE = _IOW('U', 0x42, int),
 857         SNDRV_CTL_IOCTL_POWER = _IOWR('U', 0xd0, int),
 858         SNDRV_CTL_IOCTL_POWER_STATE = _IOR('U', 0xd1, int),
 859 };
 860
 861 /*
 862  *  Read interface.
 863  */
 864
 865 enum sndrv_ctl_event_type {
 866         SNDRV_CTL_EVENT_ELEM = 0,
 867         SNDRV_CTL_EVENT_LAST = SNDRV_CTL_EVENT_ELEM,
 868 };
 869
 870 #define SNDRV_CTL_EVENT_MASK_VALUE      (1<<0)  /* element value was changed */
 871 #define SNDRV_CTL_EVENT_MASK_INFO       (1<<1)  /* element info was changed */
 872 #define SNDRV_CTL_EVENT_MASK_ADD        (1<<2)  /* element was added */
 873 #define SNDRV_CTL_EVENT_MASK_TLV        (1<<3)  /* element TLV tree was changed */
 874 #define SNDRV_CTL_EVENT_MASK_REMOVE     (~0U)   /* element was removed */
 875
 876 struct snd_ctl_event {
 877         int type;       /* event type - SNDRV_CTL_EVENT_* */
 878         union {
 879                 struct {
 880                         unsigned int mask;
 881                         struct snd_ctl_elem_id id;
 882                 } elem;
 883                 unsigned char data8[60];
 884         } data;
 885 };
 886
 887 /*
 888  *  Control names
 889  */
 890
 891 #define SNDRV_CTL_NAME_NONE                             ""
 892 #define SNDRV_CTL_NAME_PLAYBACK                         "Playback "
 893 #define SNDRV_CTL_NAME_CAPTURE                          "Capture "
 894
 895 #define SNDRV_CTL_NAME_IEC958_NONE                      ""
 896 #define SNDRV_CTL_NAME_IEC958_SWITCH                    "Switch"
 897 #define SNDRV_CTL_NAME_IEC958_VOLUME                    "Volume"
 898 #define SNDRV_CTL_NAME_IEC958_DEFAULT                   "Default"
 899 #define SNDRV_CTL_NAME_IEC958_MASK                      "Mask"
 900 #define SNDRV_CTL_NAME_IEC958_CON_MASK                  "Con Mask"
 901 #define SNDRV_CTL_NAME_IEC958_PRO_MASK                  "Pro Mask"
 902 #define SNDRV_CTL_NAME_IEC958_PCM_STREAM                "PCM Stream"
 903 #define SNDRV_CTL_NAME_IEC958(expl,direction,what)      "IEC958 " expl SNDRV_CTL_NAME_##direction SNDRV_CTL_NAME_IEC958_##what
 904
 905 /*
 906  *
 907  */
 908
 909 struct snd_xferv {
 910         const struct iovec *vector;
 911         unsigned long count;
 912 };
 913
 914 enum {
 915         SNDRV_IOCTL_READV = _IOW('K', 0x00, struct snd_xferv),
 916         SNDRV_IOCTL_WRITEV = _IOW('K', 0x01, struct snd_xferv),
 917 };
 918
 919 #endif /* __SOUND_ASOUND_H */