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   1 /*
   2  * <linux/usb/audio.h> -- USB Audio definitions.
   3  *
   4  * Copyright (C) 2006 Thumtronics Pty Ltd.
   5  * Developed for Thumtronics by Grey Innovation
   6  * Ben Williamson <ben.williamson@greyinnovation.com>
   7  *
   8  * This software is distributed under the terms of the GNU General Public
   9  * License ("GPL") version 2, as published by the Free Software Foundation.
  10  *
  11  * This file holds USB constants and structures defined
  12  * by the USB Device Class Definition for Audio Devices.
  13  * Comments below reference relevant sections of that document:
  14  *
  15  * http://www.usb.org/developers/devclass_docs/audio10.pdf
  16  *
  17  * Types and defines in this file are either specific to version 1.0 of
  18  * this standard or common for newer versions.
  19  */
  20
  21 #ifndef __LINUX_USB_AUDIO_H
  22 #define __LINUX_USB_AUDIO_H
  23
  24 #include <linux/types.h>
  25
  26 /* bInterfaceProtocol values to denote the version of the standard used */
  27 #define UAC_VERSION_1                   0x00
  28 #define UAC_VERSION_2                   0x20
  29
  30 /* A.2 Audio Interface Subclass Codes */
  31 #define USB_SUBCLASS_AUDIOCONTROL       0x01
  32 #define USB_SUBCLASS_AUDIOSTREAMING     0x02
  33 #define USB_SUBCLASS_MIDISTREAMING      0x03
  34
  35 /* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */
  36 #define UAC_HEADER                      0x01
  37 #define UAC_INPUT_TERMINAL              0x02
  38 #define UAC_OUTPUT_TERMINAL             0x03
  39 #define UAC_MIXER_UNIT                  0x04
  40 #define UAC_SELECTOR_UNIT               0x05
  41 #define UAC_FEATURE_UNIT                0x06
  42 #define UAC_PROCESSING_UNIT_V1          0x07
  43 #define UAC_EXTENSION_UNIT_V1           0x08
  44
  45 /* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */
  46 #define UAC_AS_GENERAL                  0x01
  47 #define UAC_FORMAT_TYPE                 0x02
  48 #define UAC_FORMAT_SPECIFIC             0x03
  49
  50 /* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */
  51 #define UAC_EP_GENERAL                  0x01
  52
  53 /* A.9 Audio Class-Specific Request Codes */
  54 #define UAC_SET_                        0x00
  55 #define UAC_GET_                        0x80
  56
  57 #define UAC__CUR                        0x1
  58 #define UAC__MIN                        0x2
  59 #define UAC__MAX                        0x3
  60 #define UAC__RES                        0x4
  61 #define UAC__MEM                        0x5
  62
  63 #define UAC_SET_CUR                     (UAC_SET_ | UAC__CUR)
  64 #define UAC_GET_CUR                     (UAC_GET_ | UAC__CUR)
  65 #define UAC_SET_MIN                     (UAC_SET_ | UAC__MIN)
  66 #define UAC_GET_MIN                     (UAC_GET_ | UAC__MIN)
  67 #define UAC_SET_MAX                     (UAC_SET_ | UAC__MAX)
  68 #define UAC_GET_MAX                     (UAC_GET_ | UAC__MAX)
  69 #define UAC_SET_RES                     (UAC_SET_ | UAC__RES)
  70 #define UAC_GET_RES                     (UAC_GET_ | UAC__RES)
  71 #define UAC_SET_MEM                     (UAC_SET_ | UAC__MEM)
  72 #define UAC_GET_MEM                     (UAC_GET_ | UAC__MEM)
  73
  74 #define UAC_GET_STAT                    0xff
  75
  76 /* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */
  77 #define UAC_MS_HEADER                   0x01
  78 #define UAC_MIDI_IN_JACK                0x02
  79 #define UAC_MIDI_OUT_JACK               0x03
  80
  81 /* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */
  82 #define UAC_MS_GENERAL                  0x01
  83
  84 /* Terminals - 2.1 USB Terminal Types */
  85 #define UAC_TERMINAL_UNDEFINED          0x100
  86 #define UAC_TERMINAL_STREAMING          0x101
  87 #define UAC_TERMINAL_VENDOR_SPEC        0x1FF
  88
  89 /* Terminal Control Selectors */
  90 /* 4.3.2  Class-Specific AC Interface Descriptor */
  91 struct uac_ac_header_descriptor_v1 {
  92         __u8  bLength;                  /* 8 + n */
  93         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
  94         __u8  bDescriptorSubtype;       /* UAC_MS_HEADER */
  95         __le16 bcdADC;                  /* 0x0100 */
  96         __le16 wTotalLength;            /* includes Unit and Terminal desc. */
  97         __u8  bInCollection;            /* n */
  98         __u8  baInterfaceNr[];          /* [n] */
  99 } __attribute__ ((packed));
 100
 101 #define UAC_DT_AC_HEADER_SIZE(n)        (8 + (n))
 102
 103 /* As above, but more useful for defining your own descriptors: */
 104 #define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n)                     \
 105 struct uac_ac_header_descriptor_v1_##n {                        \
 106         __u8  bLength;                                          \
 107         __u8  bDescriptorType;                                  \
 108         __u8  bDescriptorSubtype;                               \
 109         __le16 bcdADC;                                          \
 110         __le16 wTotalLength;                                    \
 111         __u8  bInCollection;                                    \
 112         __u8  baInterfaceNr[n];                                 \
 113 } __attribute__ ((packed))
 114
 115 /* 4.3.2.1 Input Terminal Descriptor */
 116 struct uac_input_terminal_descriptor {
 117         __u8  bLength;                  /* in bytes: 12 */
 118         __u8  bDescriptorType;          /* CS_INTERFACE descriptor type */
 119         __u8  bDescriptorSubtype;       /* INPUT_TERMINAL descriptor subtype */
 120         __u8  bTerminalID;              /* Constant uniquely terminal ID */
 121         __le16 wTerminalType;           /* USB Audio Terminal Types */
 122         __u8  bAssocTerminal;           /* ID of the Output Terminal associated */
 123         __u8  bNrChannels;              /* Number of logical output channels */
 124         __le16 wChannelConfig;
 125         __u8  iChannelNames;
 126         __u8  iTerminal;
 127 } __attribute__ ((packed));
 128
 129 #define UAC_DT_INPUT_TERMINAL_SIZE                      12
 130
 131 /* Terminals - 2.2 Input Terminal Types */
 132 #define UAC_INPUT_TERMINAL_UNDEFINED                    0x200
 133 #define UAC_INPUT_TERMINAL_MICROPHONE                   0x201
 134 #define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE           0x202
 135 #define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE          0x203
 136 #define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE          0x204
 137 #define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY             0x205
 138 #define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY        0x206
 139
 140 /* Terminals - control selectors */
 141
 142 #define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL            0x01
 143
 144 /* 4.3.2.2 Output Terminal Descriptor */
 145 struct uac_output_terminal_descriptor_v1 {
 146         __u8  bLength;                  /* in bytes: 9 */
 147         __u8  bDescriptorType;          /* CS_INTERFACE descriptor type */
 148         __u8  bDescriptorSubtype;       /* OUTPUT_TERMINAL descriptor subtype */
 149         __u8  bTerminalID;              /* Constant uniquely terminal ID */
 150         __le16 wTerminalType;           /* USB Audio Terminal Types */
 151         __u8  bAssocTerminal;           /* ID of the Input Terminal associated */
 152         __u8  bSourceID;                /* ID of the connected Unit or Terminal*/
 153         __u8  iTerminal;
 154 } __attribute__ ((packed));
 155
 156 #define UAC_DT_OUTPUT_TERMINAL_SIZE                     9
 157
 158 /* Terminals - 2.3 Output Terminal Types */
 159 #define UAC_OUTPUT_TERMINAL_UNDEFINED                   0x300
 160 #define UAC_OUTPUT_TERMINAL_SPEAKER                     0x301
 161 #define UAC_OUTPUT_TERMINAL_HEADPHONES                  0x302
 162 #define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO  0x303
 163 #define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER             0x304
 164 #define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER                0x305
 165 #define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER       0x306
 166 #define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER    0x307
 167
 168 /* Set bControlSize = 2 as default setting */
 169 #define UAC_DT_FEATURE_UNIT_SIZE(ch)            (7 + ((ch) + 1) * 2)
 170
 171 /* As above, but more useful for defining your own descriptors: */
 172 #define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch)                 \
 173 struct uac_feature_unit_descriptor_##ch {                       \
 174         __u8  bLength;                                          \
 175         __u8  bDescriptorType;                                  \
 176         __u8  bDescriptorSubtype;                               \
 177         __u8  bUnitID;                                          \
 178         __u8  bSourceID;                                        \
 179         __u8  bControlSize;                                     \
 180         __le16 bmaControls[ch + 1];                             \
 181         __u8  iFeature;                                         \
 182 } __attribute__ ((packed))
 183
 184 /* 4.3.2.3 Mixer Unit Descriptor */
 185 struct uac_mixer_unit_descriptor {
 186         __u8 bLength;
 187         __u8 bDescriptorType;
 188         __u8 bDescriptorSubtype;
 189         __u8 bUnitID;
 190         __u8 bNrInPins;
 191         __u8 baSourceID[];
 192 } __attribute__ ((packed));
 193
 194 static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)
 195 {
 196         return desc->baSourceID[desc->bNrInPins];
 197 }
 198
 199 static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc,
 200                                                   int protocol)
 201 {
 202         if (protocol == UAC_VERSION_1)
 203                 return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
 204                         desc->baSourceID[desc->bNrInPins + 1];
 205         else
 206                 return  (desc->baSourceID[desc->bNrInPins + 4] << 24) |
 207                         (desc->baSourceID[desc->bNrInPins + 3] << 16) |
 208                         (desc->baSourceID[desc->bNrInPins + 2] << 8)  |
 209                         (desc->baSourceID[desc->bNrInPins + 1]);
 210 }
 211
 212 static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc,
 213                                                 int protocol)
 214 {
 215         return (protocol == UAC_VERSION_1) ?
 216                 desc->baSourceID[desc->bNrInPins + 3] :
 217                 desc->baSourceID[desc->bNrInPins + 5];
 218 }
 219
 220 static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc,
 221                                               int protocol)
 222 {
 223         return (protocol == UAC_VERSION_1) ?
 224                 &desc->baSourceID[desc->bNrInPins + 4] :
 225                 &desc->baSourceID[desc->bNrInPins + 6];
 226 }
 227
 228 static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc)
 229 {
 230         __u8 *raw = (__u8 *) desc;
 231         return raw[desc->bLength - 1];
 232 }
 233
 234 /* 4.3.2.4 Selector Unit Descriptor */
 235 struct uac_selector_unit_descriptor {
 236         __u8 bLength;
 237         __u8 bDescriptorType;
 238         __u8 bDescriptorSubtype;
 239         __u8 bUintID;
 240         __u8 bNrInPins;
 241         __u8 baSourceID[];
 242 } __attribute__ ((packed));
 243
 244 static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)
 245 {
 246         __u8 *raw = (__u8 *) desc;
 247         return raw[9 + desc->bLength - 1];
 248 }
 249
 250 /* 4.3.2.5 Feature Unit Descriptor */
 251 struct uac_feature_unit_descriptor {
 252         __u8 bLength;
 253         __u8 bDescriptorType;
 254         __u8 bDescriptorSubtype;
 255         __u8 bUnitID;
 256         __u8 bSourceID;
 257         __u8 bControlSize;
 258         __u8 bmaControls[0]; /* variable length */
 259 } __attribute__((packed));
 260
 261 static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc)
 262 {
 263         __u8 *raw = (__u8 *) desc;
 264         return raw[desc->bLength - 1];
 265 }
 266
 267 /* 4.3.2.6 Processing Unit Descriptors */
 268 struct uac_processing_unit_descriptor {
 269         __u8 bLength;
 270         __u8 bDescriptorType;
 271         __u8 bDescriptorSubtype;
 272         __u8 bUnitID;
 273         __u16 wProcessType;
 274         __u8 bNrInPins;
 275         __u8 baSourceID[];
 276 } __attribute__ ((packed));
 277
 278 static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)
 279 {
 280         return desc->baSourceID[desc->bNrInPins];
 281 }
 282
 283 static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc,
 284                                                        int protocol)
 285 {
 286         if (protocol == UAC_VERSION_1)
 287                 return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
 288                         desc->baSourceID[desc->bNrInPins + 1];
 289         else
 290                 return  (desc->baSourceID[desc->bNrInPins + 4] << 24) |
 291                         (desc->baSourceID[desc->bNrInPins + 3] << 16) |
 292                         (desc->baSourceID[desc->bNrInPins + 2] << 8)  |
 293                         (desc->baSourceID[desc->bNrInPins + 1]);
 294 }
 295
 296 static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc,
 297                                                      int protocol)
 298 {
 299         return (protocol == UAC_VERSION_1) ?
 300                 desc->baSourceID[desc->bNrInPins + 3] :
 301                 desc->baSourceID[desc->bNrInPins + 5];
 302 }
 303
 304 static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc,
 305                                                     int protocol)
 306 {
 307         return (protocol == UAC_VERSION_1) ?
 308                 desc->baSourceID[desc->bNrInPins + 4] :
 309                 desc->baSourceID[desc->bNrInPins + 6];
 310 }
 311
 312 static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc,
 313                                                    int protocol)
 314 {
 315         return (protocol == UAC_VERSION_1) ?
 316                 &desc->baSourceID[desc->bNrInPins + 5] :
 317                 &desc->baSourceID[desc->bNrInPins + 7];
 318 }
 319
 320 static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc,
 321                                                    int protocol)
 322 {
 323         __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
 324         return desc->baSourceID[desc->bNrInPins + control_size];
 325 }
 326
 327 static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc,
 328                                                  int protocol)
 329 {
 330         __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
 331         return &desc->baSourceID[desc->bNrInPins + control_size + 1];
 332 }
 333
 334 /* 4.5.2 Class-Specific AS Interface Descriptor */
 335 struct uac_as_header_descriptor_v1 {
 336         __u8  bLength;                  /* in bytes: 7 */
 337         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 338         __u8  bDescriptorSubtype;       /* AS_GENERAL */
 339         __u8  bTerminalLink;            /* Terminal ID of connected Terminal */
 340         __u8  bDelay;                   /* Delay introduced by the data path */
 341         __le16 wFormatTag;              /* The Audio Data Format */
 342 } __attribute__ ((packed));
 343
 344 #define UAC_DT_AS_HEADER_SIZE           7
 345
 346 /* Formats - A.1.1 Audio Data Format Type I Codes */
 347 #define UAC_FORMAT_TYPE_I_UNDEFINED     0x0
 348 #define UAC_FORMAT_TYPE_I_PCM           0x1
 349 #define UAC_FORMAT_TYPE_I_PCM8          0x2
 350 #define UAC_FORMAT_TYPE_I_IEEE_FLOAT    0x3
 351 #define UAC_FORMAT_TYPE_I_ALAW          0x4
 352 #define UAC_FORMAT_TYPE_I_MULAW         0x5
 353
 354 struct uac_format_type_i_continuous_descriptor {
 355         __u8  bLength;                  /* in bytes: 8 + (ns * 3) */
 356         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 357         __u8  bDescriptorSubtype;       /* FORMAT_TYPE */
 358         __u8  bFormatType;              /* FORMAT_TYPE_1 */
 359         __u8  bNrChannels;              /* physical channels in the stream */
 360         __u8  bSubframeSize;            /* */
 361         __u8  bBitResolution;
 362         __u8  bSamFreqType;
 363         __u8  tLowerSamFreq[3];
 364         __u8  tUpperSamFreq[3];
 365 } __attribute__ ((packed));
 366
 367 #define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE  14
 368
 369 struct uac_format_type_i_discrete_descriptor {
 370         __u8  bLength;                  /* in bytes: 8 + (ns * 3) */
 371         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 372         __u8  bDescriptorSubtype;       /* FORMAT_TYPE */
 373         __u8  bFormatType;              /* FORMAT_TYPE_1 */
 374         __u8  bNrChannels;              /* physical channels in the stream */
 375         __u8  bSubframeSize;            /* */
 376         __u8  bBitResolution;
 377         __u8  bSamFreqType;
 378         __u8  tSamFreq[][3];
 379 } __attribute__ ((packed));
 380
 381 #define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n)              \
 382 struct uac_format_type_i_discrete_descriptor_##n {              \
 383         __u8  bLength;                                          \
 384         __u8  bDescriptorType;                                  \
 385         __u8  bDescriptorSubtype;                               \
 386         __u8  bFormatType;                                      \
 387         __u8  bNrChannels;                                      \
 388         __u8  bSubframeSize;                                    \
 389         __u8  bBitResolution;                                   \
 390         __u8  bSamFreqType;                                     \
 391         __u8  tSamFreq[n][3];                                   \
 392 } __attribute__ ((packed))
 393
 394 #define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
 395
 396 struct uac_format_type_i_ext_descriptor {
 397         __u8 bLength;
 398         __u8 bDescriptorType;
 399         __u8 bDescriptorSubtype;
 400         __u8 bFormatType;
 401         __u8 bSubslotSize;
 402         __u8 bBitResolution;
 403         __u8 bHeaderLength;
 404         __u8 bControlSize;
 405         __u8 bSideBandProtocol;
 406 } __attribute__((packed));
 407
 408 /* Formats - Audio Data Format Type I Codes */
 409
 410 #define UAC_FORMAT_TYPE_II_MPEG 0x1001
 411 #define UAC_FORMAT_TYPE_II_AC3  0x1002
 412
 413 struct uac_format_type_ii_discrete_descriptor {
 414         __u8 bLength;
 415         __u8 bDescriptorType;
 416         __u8 bDescriptorSubtype;
 417         __u8 bFormatType;
 418         __le16 wMaxBitRate;
 419         __le16 wSamplesPerFrame;
 420         __u8 bSamFreqType;
 421         __u8 tSamFreq[][3];
 422 } __attribute__((packed));
 423
 424 struct uac_format_type_ii_ext_descriptor {
 425         __u8 bLength;
 426         __u8 bDescriptorType;
 427         __u8 bDescriptorSubtype;
 428         __u8 bFormatType;
 429         __u16 wMaxBitRate;
 430         __u16 wSamplesPerFrame;
 431         __u8 bHeaderLength;
 432         __u8 bSideBandProtocol;
 433 } __attribute__((packed));
 434
 435 /* type III */
 436 #define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001
 437 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1        0x2002
 438 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003
 439 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT   0x2004
 440 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS     0x2005
 441 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS    0x2006
 442
 443 /* Formats - A.2 Format Type Codes */
 444 #define UAC_FORMAT_TYPE_UNDEFINED       0x0
 445 #define UAC_FORMAT_TYPE_I               0x1
 446 #define UAC_FORMAT_TYPE_II              0x2
 447 #define UAC_FORMAT_TYPE_III             0x3
 448 #define UAC_EXT_FORMAT_TYPE_I           0x81
 449 #define UAC_EXT_FORMAT_TYPE_II          0x82
 450 #define UAC_EXT_FORMAT_TYPE_III         0x83
 451
 452 struct uac_iso_endpoint_descriptor {
 453         __u8  bLength;                  /* in bytes: 7 */
 454         __u8  bDescriptorType;          /* USB_DT_CS_ENDPOINT */
 455         __u8  bDescriptorSubtype;       /* EP_GENERAL */
 456         __u8  bmAttributes;
 457         __u8  bLockDelayUnits;
 458         __le16 wLockDelay;
 459 } __attribute__((packed));
 460 #define UAC_ISO_ENDPOINT_DESC_SIZE      7
 461
 462 #define UAC_EP_CS_ATTR_SAMPLE_RATE      0x01
 463 #define UAC_EP_CS_ATTR_PITCH_CONTROL    0x02
 464 #define UAC_EP_CS_ATTR_FILL_MAX         0x80
 465
 466 /* A.10.2 Feature Unit Control Selectors */
 467
 468 #define UAC_FU_CONTROL_UNDEFINED        0x00
 469 #define UAC_MUTE_CONTROL                0x01
 470 #define UAC_VOLUME_CONTROL              0x02
 471 #define UAC_BASS_CONTROL                0x03
 472 #define UAC_MID_CONTROL                 0x04
 473 #define UAC_TREBLE_CONTROL              0x05
 474 #define UAC_GRAPHIC_EQUALIZER_CONTROL   0x06
 475 #define UAC_AUTOMATIC_GAIN_CONTROL      0x07
 476 #define UAC_DELAY_CONTROL               0x08
 477 #define UAC_BASS_BOOST_CONTROL          0x09
 478 #define UAC_LOUDNESS_CONTROL            0x0a
 479
 480 #define UAC_FU_MUTE             (1 << (UAC_MUTE_CONTROL - 1))
 481 #define UAC_FU_VOLUME           (1 << (UAC_VOLUME_CONTROL - 1))
 482 #define UAC_FU_BASS             (1 << (UAC_BASS_CONTROL - 1))
 483 #define UAC_FU_MID              (1 << (UAC_MID_CONTROL - 1))
 484 #define UAC_FU_TREBLE           (1 << (UAC_TREBLE_CONTROL - 1))
 485 #define UAC_FU_GRAPHIC_EQ       (1 << (UAC_GRAPHIC_EQUALIZER_CONTROL - 1))
 486 #define UAC_FU_AUTO_GAIN        (1 << (UAC_AUTOMATIC_GAIN_CONTROL - 1))
 487 #define UAC_FU_DELAY            (1 << (UAC_DELAY_CONTROL - 1))
 488 #define UAC_FU_BASS_BOOST       (1 << (UAC_BASS_BOOST_CONTROL - 1))
 489 #define UAC_FU_LOUDNESS         (1 << (UAC_LOUDNESS_CONTROL - 1))
 490
 491 /* status word format (3.7.1.1) */
 492
 493 #define UAC1_STATUS_TYPE_ORIG_MASK              0x0f
 494 #define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF  0x0
 495 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF   0x1
 496 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP   0x2
 497
 498 #define UAC1_STATUS_TYPE_IRQ_PENDING            (1 << 7)
 499 #define UAC1_STATUS_TYPE_MEM_CHANGED            (1 << 6)
 500
 501 struct uac1_status_word {
 502         __u8 bStatusType;
 503         __u8 bOriginator;
 504 } __attribute__((packed));
 505
 506 #ifdef __KERNEL__
 507
 508 struct usb_audio_control {
 509         struct list_head list;
 510         const char *name;
 511         u8 type;
 512         int data[5];
 513         int (*set)(struct usb_audio_control *con, u8 cmd, int value);
 514         int (*get)(struct usb_audio_control *con, u8 cmd);
 515 };
 516
 517 struct usb_audio_control_selector {
 518         struct list_head list;
 519         struct list_head control;
 520         u8 id;
 521         const char *name;
 522         u8 type;
 523         struct usb_descriptor_header *desc;
 524 };
 525
 526 #endif /* __KERNEL__ */
 527
 528 #endif /* __LINUX_USB_AUDIO_H */