LXR linux/include/uapi/linux/usb/audio.h

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2/*
   3 * <linux/usb/audio.h> -- USB Audio definitions.
   4 *
   5 * Copyright (C) 2006 Thumtronics Pty Ltd.
   6 * Developed for Thumtronics by Grey Innovation
   7 * Ben Williamson <ben.williamson@greyinnovation.com>
   8 *
   9 * This software is distributed under the terms of the GNU General Public
  10 * License ("GPL") version 2, as published by the Free Software Foundation.
  11 *
  12 * This file holds USB constants and structures defined
  13 * by the USB Device Class Definition for Audio Devices.
  14 * Comments below reference relevant sections of that document:
  15 *
  16 * http://www.usb.org/developers/devclass_docs/audio10.pdf
  17 *
  18 * Types and defines in this file are either specific to version 1.0 of
  19 * this standard or common for newer versions.
  20 */
  21
  22#ifndef _UAPI__LINUX_USB_AUDIO_H
  23#define _UAPI__LINUX_USB_AUDIO_H
  24
  25#include <linux/types.h>
  26
  27/* bInterfaceProtocol values to denote the version of the standard used */
  28#define UAC_VERSION_1                   0x00
  29#define UAC_VERSION_2                   0x20
  30
  31/* A.2 Audio Interface Subclass Codes */
  32#define USB_SUBCLASS_AUDIOCONTROL       0x01
  33#define USB_SUBCLASS_AUDIOSTREAMING     0x02
  34#define USB_SUBCLASS_MIDISTREAMING      0x03
  35
  36/* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */
  37#define UAC_HEADER                      0x01
  38#define UAC_INPUT_TERMINAL              0x02
  39#define UAC_OUTPUT_TERMINAL             0x03
  40#define UAC_MIXER_UNIT                  0x04
  41#define UAC_SELECTOR_UNIT               0x05
  42#define UAC_FEATURE_UNIT                0x06
  43#define UAC1_PROCESSING_UNIT            0x07
  44#define UAC1_EXTENSION_UNIT             0x08
  45
  46/* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */
  47#define UAC_AS_GENERAL                  0x01
  48#define UAC_FORMAT_TYPE                 0x02
  49#define UAC_FORMAT_SPECIFIC             0x03
  50
  51/* A.7 Processing Unit Process Types */
  52#define UAC_PROCESS_UNDEFINED           0x00
  53#define UAC_PROCESS_UP_DOWNMIX          0x01
  54#define UAC_PROCESS_DOLBY_PROLOGIC      0x02
  55#define UAC_PROCESS_STEREO_EXTENDER     0x03
  56#define UAC_PROCESS_REVERB              0x04
  57#define UAC_PROCESS_CHORUS              0x05
  58#define UAC_PROCESS_DYN_RANGE_COMP      0x06
  59
  60/* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */
  61#define UAC_EP_GENERAL                  0x01
  62
  63/* A.9 Audio Class-Specific Request Codes */
  64#define UAC_SET_                        0x00
  65#define UAC_GET_                        0x80
  66
  67#define UAC__CUR                        0x1
  68#define UAC__MIN                        0x2
  69#define UAC__MAX                        0x3
  70#define UAC__RES                        0x4
  71#define UAC__MEM                        0x5
  72
  73#define UAC_SET_CUR                     (UAC_SET_ | UAC__CUR)
  74#define UAC_GET_CUR                     (UAC_GET_ | UAC__CUR)
  75#define UAC_SET_MIN                     (UAC_SET_ | UAC__MIN)
  76#define UAC_GET_MIN                     (UAC_GET_ | UAC__MIN)
  77#define UAC_SET_MAX                     (UAC_SET_ | UAC__MAX)
  78#define UAC_GET_MAX                     (UAC_GET_ | UAC__MAX)
  79#define UAC_SET_RES                     (UAC_SET_ | UAC__RES)
  80#define UAC_GET_RES                     (UAC_GET_ | UAC__RES)
  81#define UAC_SET_MEM                     (UAC_SET_ | UAC__MEM)
  82#define UAC_GET_MEM                     (UAC_GET_ | UAC__MEM)
  83
  84#define UAC_GET_STAT                    0xff
  85
  86/* A.10 Control Selector Codes */
  87
  88/* A.10.1 Terminal Control Selectors */
  89#define UAC_TERM_COPY_PROTECT           0x01
  90
  91/* A.10.2 Feature Unit Control Selectors */
  92#define UAC_FU_MUTE                     0x01
  93#define UAC_FU_VOLUME                   0x02
  94#define UAC_FU_BASS                     0x03
  95#define UAC_FU_MID                      0x04
  96#define UAC_FU_TREBLE                   0x05
  97#define UAC_FU_GRAPHIC_EQUALIZER        0x06
  98#define UAC_FU_AUTOMATIC_GAIN           0x07
  99#define UAC_FU_DELAY                    0x08
 100#define UAC_FU_BASS_BOOST               0x09
 101#define UAC_FU_LOUDNESS                 0x0a
 102
 103#define UAC_CONTROL_BIT(CS)     (1 << ((CS) - 1))
 104
 105/* A.10.3.1 Up/Down-mix Processing Unit Controls Selectors */
 106#define UAC_UD_ENABLE                   0x01
 107#define UAC_UD_MODE_SELECT              0x02
 108
 109/* A.10.3.2 Dolby Prologic (tm) Processing Unit Controls Selectors */
 110#define UAC_DP_ENABLE                   0x01
 111#define UAC_DP_MODE_SELECT              0x02
 112
 113/* A.10.3.3 3D Stereo Extender Processing Unit Control Selectors */
 114#define UAC_3D_ENABLE                   0x01
 115#define UAC_3D_SPACE                    0x02
 116
 117/* A.10.3.4 Reverberation Processing Unit Control Selectors */
 118#define UAC_REVERB_ENABLE               0x01
 119#define UAC_REVERB_LEVEL                0x02
 120#define UAC_REVERB_TIME                 0x03
 121#define UAC_REVERB_FEEDBACK             0x04
 122
 123/* A.10.3.5 Chorus Processing Unit Control Selectors */
 124#define UAC_CHORUS_ENABLE               0x01
 125#define UAC_CHORUS_LEVEL                0x02
 126#define UAC_CHORUS_RATE                 0x03
 127#define UAC_CHORUS_DEPTH                0x04
 128
 129/* A.10.3.6 Dynamic Range Compressor Unit Control Selectors */
 130#define UAC_DCR_ENABLE                  0x01
 131#define UAC_DCR_RATE                    0x02
 132#define UAC_DCR_MAXAMPL                 0x03
 133#define UAC_DCR_THRESHOLD               0x04
 134#define UAC_DCR_ATTACK_TIME             0x05
 135#define UAC_DCR_RELEASE_TIME            0x06
 136
 137/* A.10.4 Extension Unit Control Selectors */
 138#define UAC_XU_ENABLE                   0x01
 139
 140/* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */
 141#define UAC_MS_HEADER                   0x01
 142#define UAC_MIDI_IN_JACK                0x02
 143#define UAC_MIDI_OUT_JACK               0x03
 144
 145/* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */
 146#define UAC_MS_GENERAL                  0x01
 147
 148/* Terminals - 2.1 USB Terminal Types */
 149#define UAC_TERMINAL_UNDEFINED          0x100
 150#define UAC_TERMINAL_STREAMING          0x101
 151#define UAC_TERMINAL_VENDOR_SPEC        0x1FF
 152
 153/* Terminal Control Selectors */
 154/* 4.3.2  Class-Specific AC Interface Descriptor */
 155struct uac1_ac_header_descriptor {
 156        __u8  bLength;                  /* 8 + n */
 157        __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 158        __u8  bDescriptorSubtype;       /* UAC_MS_HEADER */
 159        __le16 bcdADC;                  /* 0x0100 */
 160        __le16 wTotalLength;            /* includes Unit and Terminal desc. */
 161        __u8  bInCollection;            /* n */
 162        __u8  baInterfaceNr[];          /* [n] */
 163} __attribute__ ((packed));
 164
 165#define UAC_DT_AC_HEADER_SIZE(n)        (8 + (n))
 166
 167/* As above, but more useful for defining your own descriptors: */
 168#define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n)                     \
 169struct uac1_ac_header_descriptor_##n {                  \
 170        __u8  bLength;                                          \
 171        __u8  bDescriptorType;                                  \
 172        __u8  bDescriptorSubtype;                               \
 173        __le16 bcdADC;                                          \
 174        __le16 wTotalLength;                                    \
 175        __u8  bInCollection;                                    \
 176        __u8  baInterfaceNr[n];                                 \
 177} __attribute__ ((packed))
 178
 179/* 4.3.2.1 Input Terminal Descriptor */
 180struct uac_input_terminal_descriptor {
 181        __u8  bLength;                  /* in bytes: 12 */
 182        __u8  bDescriptorType;          /* CS_INTERFACE descriptor type */
 183        __u8  bDescriptorSubtype;       /* INPUT_TERMINAL descriptor subtype */
 184        __u8  bTerminalID;              /* Constant uniquely terminal ID */
 185        __le16 wTerminalType;           /* USB Audio Terminal Types */
 186        __u8  bAssocTerminal;           /* ID of the Output Terminal associated */
 187        __u8  bNrChannels;              /* Number of logical output channels */
 188        __le16 wChannelConfig;
 189        __u8  iChannelNames;
 190        __u8  iTerminal;
 191} __attribute__ ((packed));
 192
 193#define UAC_DT_INPUT_TERMINAL_SIZE                      12
 194
 195/* Terminals - 2.2 Input Terminal Types */
 196#define UAC_INPUT_TERMINAL_UNDEFINED                    0x200
 197#define UAC_INPUT_TERMINAL_MICROPHONE                   0x201
 198#define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE           0x202
 199#define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE          0x203
 200#define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE          0x204
 201#define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY             0x205
 202#define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY        0x206
 203
 204/* Terminals - control selectors */
 205
 206#define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL            0x01
 207
 208/* 4.3.2.2 Output Terminal Descriptor */
 209struct uac1_output_terminal_descriptor {
 210        __u8  bLength;                  /* in bytes: 9 */
 211        __u8  bDescriptorType;          /* CS_INTERFACE descriptor type */
 212        __u8  bDescriptorSubtype;       /* OUTPUT_TERMINAL descriptor subtype */
 213        __u8  bTerminalID;              /* Constant uniquely terminal ID */
 214        __le16 wTerminalType;           /* USB Audio Terminal Types */
 215        __u8  bAssocTerminal;           /* ID of the Input Terminal associated */
 216        __u8  bSourceID;                /* ID of the connected Unit or Terminal*/
 217        __u8  iTerminal;
 218} __attribute__ ((packed));
 219
 220#define UAC_DT_OUTPUT_TERMINAL_SIZE                     9
 221
 222/* Terminals - 2.3 Output Terminal Types */
 223#define UAC_OUTPUT_TERMINAL_UNDEFINED                   0x300
 224#define UAC_OUTPUT_TERMINAL_SPEAKER                     0x301
 225#define UAC_OUTPUT_TERMINAL_HEADPHONES                  0x302
 226#define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO  0x303
 227#define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER             0x304
 228#define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER                0x305
 229#define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER       0x306
 230#define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER    0x307
 231
 232/* Set bControlSize = 2 as default setting */
 233#define UAC_DT_FEATURE_UNIT_SIZE(ch)            (7 + ((ch) + 1) * 2)
 234
 235/* As above, but more useful for defining your own descriptors: */
 236#define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch)                 \
 237struct uac_feature_unit_descriptor_##ch {                       \
 238        __u8  bLength;                                          \
 239        __u8  bDescriptorType;                                  \
 240        __u8  bDescriptorSubtype;                               \
 241        __u8  bUnitID;                                          \
 242        __u8  bSourceID;                                        \
 243        __u8  bControlSize;                                     \
 244        __le16 bmaControls[ch + 1];                             \
 245        __u8  iFeature;                                         \
 246} __attribute__ ((packed))
 247
 248/* 4.3.2.3 Mixer Unit Descriptor */
 249struct uac_mixer_unit_descriptor {
 250        __u8 bLength;
 251        __u8 bDescriptorType;
 252        __u8 bDescriptorSubtype;
 253        __u8 bUnitID;
 254        __u8 bNrInPins;
 255        __u8 baSourceID[];
 256} __attribute__ ((packed));
 257
 258static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)
 259{
 260        return desc->baSourceID[desc->bNrInPins];
 261}
 262
 263static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc,
 264                                                  int protocol)
 265{
 266        if (protocol == UAC_VERSION_1)
 267                return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
 268                        desc->baSourceID[desc->bNrInPins + 1];
 269        else
 270                return  (desc->baSourceID[desc->bNrInPins + 4] << 24) |
 271                        (desc->baSourceID[desc->bNrInPins + 3] << 16) |
 272                        (desc->baSourceID[desc->bNrInPins + 2] << 8)  |
 273                        (desc->baSourceID[desc->bNrInPins + 1]);
 274}
 275
 276static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc,
 277                                                int protocol)
 278{
 279        return (protocol == UAC_VERSION_1) ?
 280                desc->baSourceID[desc->bNrInPins + 3] :
 281                desc->baSourceID[desc->bNrInPins + 5];
 282}
 283
 284static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc,
 285                                              int protocol)
 286{
 287        return (protocol == UAC_VERSION_1) ?
 288                &desc->baSourceID[desc->bNrInPins + 4] :
 289                &desc->baSourceID[desc->bNrInPins + 6];
 290}
 291
 292static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc)
 293{
 294        __u8 *raw = (__u8 *) desc;
 295        return raw[desc->bLength - 1];
 296}
 297
 298/* 4.3.2.4 Selector Unit Descriptor */
 299struct uac_selector_unit_descriptor {
 300        __u8 bLength;
 301        __u8 bDescriptorType;
 302        __u8 bDescriptorSubtype;
 303        __u8 bUintID;
 304        __u8 bNrInPins;
 305        __u8 baSourceID[];
 306} __attribute__ ((packed));
 307
 308static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)
 309{
 310        __u8 *raw = (__u8 *) desc;
 311        return raw[desc->bLength - 1];
 312}
 313
 314/* 4.3.2.5 Feature Unit Descriptor */
 315struct uac_feature_unit_descriptor {
 316        __u8 bLength;
 317        __u8 bDescriptorType;
 318        __u8 bDescriptorSubtype;
 319        __u8 bUnitID;
 320        __u8 bSourceID;
 321        __u8 bControlSize;
 322        __u8 bmaControls[0]; /* variable length */
 323} __attribute__((packed));
 324
 325static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc)
 326{
 327        __u8 *raw = (__u8 *) desc;
 328        return raw[desc->bLength - 1];
 329}
 330
 331/* 4.3.2.6 Processing Unit Descriptors */
 332struct uac_processing_unit_descriptor {
 333        __u8 bLength;
 334        __u8 bDescriptorType;
 335        __u8 bDescriptorSubtype;
 336        __u8 bUnitID;
 337        __le16 wProcessType;
 338        __u8 bNrInPins;
 339        __u8 baSourceID[];
 340} __attribute__ ((packed));
 341
 342static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)
 343{
 344        return desc->baSourceID[desc->bNrInPins];
 345}
 346
 347static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc,
 348                                                       int protocol)
 349{
 350        if (protocol == UAC_VERSION_1)
 351                return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
 352                        desc->baSourceID[desc->bNrInPins + 1];
 353        else
 354                return  (desc->baSourceID[desc->bNrInPins + 4] << 24) |
 355                        (desc->baSourceID[desc->bNrInPins + 3] << 16) |
 356                        (desc->baSourceID[desc->bNrInPins + 2] << 8)  |
 357                        (desc->baSourceID[desc->bNrInPins + 1]);
 358}
 359
 360static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc,
 361                                                     int protocol)
 362{
 363        return (protocol == UAC_VERSION_1) ?
 364                desc->baSourceID[desc->bNrInPins + 3] :
 365                desc->baSourceID[desc->bNrInPins + 5];
 366}
 367
 368static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc,
 369                                                    int protocol)
 370{
 371        return (protocol == UAC_VERSION_1) ?
 372                desc->baSourceID[desc->bNrInPins + 4] :
 373                desc->baSourceID[desc->bNrInPins + 6];
 374}
 375
 376static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc,
 377                                                   int protocol)
 378{
 379        return (protocol == UAC_VERSION_1) ?
 380                &desc->baSourceID[desc->bNrInPins + 5] :
 381                &desc->baSourceID[desc->bNrInPins + 7];
 382}
 383
 384static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc,
 385                                                   int protocol)
 386{
 387        __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
 388        return *(uac_processing_unit_bmControls(desc, protocol)
 389                        + control_size);
 390}
 391
 392static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc,
 393                                                 int protocol)
 394{
 395        __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
 396        return uac_processing_unit_bmControls(desc, protocol)
 397                        + control_size + 1;
 398}
 399
 400/* 4.5.2 Class-Specific AS Interface Descriptor */
 401struct uac1_as_header_descriptor {
 402        __u8  bLength;                  /* in bytes: 7 */
 403        __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 404        __u8  bDescriptorSubtype;       /* AS_GENERAL */
 405        __u8  bTerminalLink;            /* Terminal ID of connected Terminal */
 406        __u8  bDelay;                   /* Delay introduced by the data path */
 407        __le16 wFormatTag;              /* The Audio Data Format */
 408} __attribute__ ((packed));
 409
 410#define UAC_DT_AS_HEADER_SIZE           7
 411
 412/* Formats - A.1.1 Audio Data Format Type I Codes */
 413#define UAC_FORMAT_TYPE_I_UNDEFINED     0x0
 414#define UAC_FORMAT_TYPE_I_PCM           0x1
 415#define UAC_FORMAT_TYPE_I_PCM8          0x2
 416#define UAC_FORMAT_TYPE_I_IEEE_FLOAT    0x3
 417#define UAC_FORMAT_TYPE_I_ALAW          0x4
 418#define UAC_FORMAT_TYPE_I_MULAW         0x5
 419
 420struct uac_format_type_i_continuous_descriptor {
 421        __u8  bLength;                  /* in bytes: 8 + (ns * 3) */
 422        __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 423        __u8  bDescriptorSubtype;       /* FORMAT_TYPE */
 424        __u8  bFormatType;              /* FORMAT_TYPE_1 */
 425        __u8  bNrChannels;              /* physical channels in the stream */
 426        __u8  bSubframeSize;            /* */
 427        __u8  bBitResolution;
 428        __u8  bSamFreqType;
 429        __u8  tLowerSamFreq[3];
 430        __u8  tUpperSamFreq[3];
 431} __attribute__ ((packed));
 432
 433#define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE  14
 434
 435struct uac_format_type_i_discrete_descriptor {
 436        __u8  bLength;                  /* in bytes: 8 + (ns * 3) */
 437        __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 438        __u8  bDescriptorSubtype;       /* FORMAT_TYPE */
 439        __u8  bFormatType;              /* FORMAT_TYPE_1 */
 440        __u8  bNrChannels;              /* physical channels in the stream */
 441        __u8  bSubframeSize;            /* */
 442        __u8  bBitResolution;
 443        __u8  bSamFreqType;
 444        __u8  tSamFreq[][3];
 445} __attribute__ ((packed));
 446
 447#define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n)              \
 448struct uac_format_type_i_discrete_descriptor_##n {              \
 449        __u8  bLength;                                          \
 450        __u8  bDescriptorType;                                  \
 451        __u8  bDescriptorSubtype;                               \
 452        __u8  bFormatType;                                      \
 453        __u8  bNrChannels;                                      \
 454        __u8  bSubframeSize;                                    \
 455        __u8  bBitResolution;                                   \
 456        __u8  bSamFreqType;                                     \
 457        __u8  tSamFreq[n][3];                                   \
 458} __attribute__ ((packed))
 459
 460#define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
 461
 462struct uac_format_type_i_ext_descriptor {
 463        __u8 bLength;
 464        __u8 bDescriptorType;
 465        __u8 bDescriptorSubtype;
 466        __u8 bFormatType;
 467        __u8 bSubslotSize;
 468        __u8 bBitResolution;
 469        __u8 bHeaderLength;
 470        __u8 bControlSize;
 471        __u8 bSideBandProtocol;
 472} __attribute__((packed));
 473
 474/* Formats - Audio Data Format Type I Codes */
 475
 476#define UAC_FORMAT_TYPE_II_MPEG 0x1001
 477#define UAC_FORMAT_TYPE_II_AC3  0x1002
 478
 479struct uac_format_type_ii_discrete_descriptor {
 480        __u8 bLength;
 481        __u8 bDescriptorType;
 482        __u8 bDescriptorSubtype;
 483        __u8 bFormatType;
 484        __le16 wMaxBitRate;
 485        __le16 wSamplesPerFrame;
 486        __u8 bSamFreqType;
 487        __u8 tSamFreq[][3];
 488} __attribute__((packed));
 489
 490struct uac_format_type_ii_ext_descriptor {
 491        __u8 bLength;
 492        __u8 bDescriptorType;
 493        __u8 bDescriptorSubtype;
 494        __u8 bFormatType;
 495        __le16 wMaxBitRate;
 496        __le16 wSamplesPerFrame;
 497        __u8 bHeaderLength;
 498        __u8 bSideBandProtocol;
 499} __attribute__((packed));
 500
 501/* type III */
 502#define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001
 503#define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1        0x2002
 504#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003
 505#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT   0x2004
 506#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS     0x2005
 507#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS    0x2006
 508
 509/* Formats - A.2 Format Type Codes */
 510#define UAC_FORMAT_TYPE_UNDEFINED       0x0
 511#define UAC_FORMAT_TYPE_I               0x1
 512#define UAC_FORMAT_TYPE_II              0x2
 513#define UAC_FORMAT_TYPE_III             0x3
 514#define UAC_EXT_FORMAT_TYPE_I           0x81
 515#define UAC_EXT_FORMAT_TYPE_II          0x82
 516#define UAC_EXT_FORMAT_TYPE_III         0x83
 517
 518struct uac_iso_endpoint_descriptor {
 519        __u8  bLength;                  /* in bytes: 7 */
 520        __u8  bDescriptorType;          /* USB_DT_CS_ENDPOINT */
 521        __u8  bDescriptorSubtype;       /* EP_GENERAL */
 522        __u8  bmAttributes;
 523        __u8  bLockDelayUnits;
 524        __le16 wLockDelay;
 525} __attribute__((packed));
 526#define UAC_ISO_ENDPOINT_DESC_SIZE      7
 527
 528#define UAC_EP_CS_ATTR_SAMPLE_RATE      0x01
 529#define UAC_EP_CS_ATTR_PITCH_CONTROL    0x02
 530#define UAC_EP_CS_ATTR_FILL_MAX         0x80
 531
 532/* status word format (3.7.1.1) */
 533
 534#define UAC1_STATUS_TYPE_ORIG_MASK              0x0f
 535#define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF  0x0
 536#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF   0x1
 537#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP   0x2
 538
 539#define UAC1_STATUS_TYPE_IRQ_PENDING            (1 << 7)
 540#define UAC1_STATUS_TYPE_MEM_CHANGED            (1 << 6)
 541
 542struct uac1_status_word {
 543        __u8 bStatusType;
 544        __u8 bOriginator;
 545} __attribute__((packed));
 546
 547
 548#endif /* _UAPI__LINUX_USB_AUDIO_H */
 549