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#define UAC_VERSION_3 0x30 31 32/* A.2 Audio Interface Subclass Codes */ 33#define USB_SUBCLASS_AUDIOCONTROL 0x01 34#define USB_SUBCLASS_AUDIOSTREAMING 0x02 35#define USB_SUBCLASS_MIDISTREAMING 0x03 36 37/* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */ 38#define UAC_HEADER 0x01 39#define UAC_INPUT_TERMINAL 0x02 40#define UAC_OUTPUT_TERMINAL 0x03 41#define UAC_MIXER_UNIT 0x04 42#define UAC_SELECTOR_UNIT 0x05 43#define UAC_FEATURE_UNIT 0x06 44#define UAC1_PROCESSING_UNIT 0x07 45#define UAC1_EXTENSION_UNIT 0x08 46 47/* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */ 48#define UAC_AS_GENERAL 0x01 49#define UAC_FORMAT_TYPE 0x02 50#define UAC_FORMAT_SPECIFIC 0x03 51 52/* A.7 Processing Unit Process Types */ 53#define UAC_PROCESS_UNDEFINED 0x00 54#define UAC_PROCESS_UP_DOWNMIX 0x01 55#define UAC_PROCESS_DOLBY_PROLOGIC 0x02 56#define UAC_PROCESS_STEREO_EXTENDER 0x03 57#define UAC_PROCESS_REVERB 0x04 58#define UAC_PROCESS_CHORUS 0x05 59#define UAC_PROCESS_DYN_RANGE_COMP 0x06 60 61/* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */ 62#define UAC_EP_GENERAL 0x01 63 64/* A.9 Audio Class-Specific Request Codes */ 65#define UAC_SET_ 0x00 66#define UAC_GET_ 0x80 67 68#define UAC__CUR 0x1 69#define UAC__MIN 0x2 70#define UAC__MAX 0x3 71#define UAC__RES 0x4 72#define UAC__MEM 0x5 73 74#define UAC_SET_CUR (UAC_SET_ | UAC__CUR) 75#define UAC_GET_CUR (UAC_GET_ | UAC__CUR) 76#define UAC_SET_MIN (UAC_SET_ | UAC__MIN) 77#define UAC_GET_MIN (UAC_GET_ | UAC__MIN) 78#define UAC_SET_MAX (UAC_SET_ | UAC__MAX) 79#define UAC_GET_MAX (UAC_GET_ | UAC__MAX) 80#define UAC_SET_RES (UAC_SET_ | UAC__RES) 81#define UAC_GET_RES (UAC_GET_ | UAC__RES) 82#define UAC_SET_MEM (UAC_SET_ | UAC__MEM) 83#define UAC_GET_MEM (UAC_GET_ | UAC__MEM) 84 85#define UAC_GET_STAT 0xff 86 87/* A.10 Control Selector Codes */ 88 89/* A.10.1 Terminal Control Selectors */ 90#define UAC_TERM_COPY_PROTECT 0x01 91 92/* A.10.2 Feature Unit Control Selectors */ 93#define UAC_FU_MUTE 0x01 94#define UAC_FU_VOLUME 0x02 95#define UAC_FU_BASS 0x03 96#define UAC_FU_MID 0x04 97#define UAC_FU_TREBLE 0x05 98#define UAC_FU_GRAPHIC_EQUALIZER 0x06 99#define UAC_FU_AUTOMATIC_GAIN 0x07 100#define UAC_FU_DELAY 0x08 101#define UAC_FU_BASS_BOOST 0x09 102#define UAC_FU_LOUDNESS 0x0a 103 104#define UAC_CONTROL_BIT(CS) (1 << ((CS) - 1)) 105 106/* A.10.3.1 Up/Down-mix Processing Unit Controls Selectors */ 107#define UAC_UD_ENABLE 0x01 108#define UAC_UD_MODE_SELECT 0x02 109 110/* A.10.3.2 Dolby Prologic (tm) Processing Unit Controls Selectors */ 111#define UAC_DP_ENABLE 0x01 112#define UAC_DP_MODE_SELECT 0x02 113 114/* A.10.3.3 3D Stereo Extender Processing Unit Control Selectors */ 115#define UAC_3D_ENABLE 0x01 116#define UAC_3D_SPACE 0x02 117 118/* A.10.3.4 Reverberation Processing Unit Control Selectors */ 119#define UAC_REVERB_ENABLE 0x01 120#define UAC_REVERB_LEVEL 0x02 121#define UAC_REVERB_TIME 0x03 122#define UAC_REVERB_FEEDBACK 0x04 123 124/* A.10.3.5 Chorus Processing Unit Control Selectors */ 125#define UAC_CHORUS_ENABLE 0x01 126#define UAC_CHORUS_LEVEL 0x02 127#define UAC_CHORUS_RATE 0x03 128#define UAC_CHORUS_DEPTH 0x04 129 130/* A.10.3.6 Dynamic Range Compressor Unit Control Selectors */ 131#define UAC_DCR_ENABLE 0x01 132#define UAC_DCR_RATE 0x02 133#define UAC_DCR_MAXAMPL 0x03 134#define UAC_DCR_THRESHOLD 0x04 135#define UAC_DCR_ATTACK_TIME 0x05 136#define UAC_DCR_RELEASE_TIME 0x06 137 138/* A.10.4 Extension Unit Control Selectors */ 139#define UAC_XU_ENABLE 0x01 140 141/* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */ 142#define UAC_MS_HEADER 0x01 143#define UAC_MIDI_IN_JACK 0x02 144#define UAC_MIDI_OUT_JACK 0x03 145 146/* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */ 147#define UAC_MS_GENERAL 0x01 148 149/* Terminals - 2.1 USB Terminal Types */ 150#define UAC_TERMINAL_UNDEFINED 0x100 151#define UAC_TERMINAL_STREAMING 0x101 152#define UAC_TERMINAL_VENDOR_SPEC 0x1FF 153 154/* Terminal Control Selectors */ 155/* 4.3.2 Class-Specific AC Interface Descriptor */ 156struct uac1_ac_header_descriptor { 157 __u8 bLength; /* 8 + n */ 158 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 159 __u8 bDescriptorSubtype; /* UAC_MS_HEADER */ 160 __le16 bcdADC; /* 0x0100 */ 161 __le16 wTotalLength; /* includes Unit and Terminal desc. */ 162 __u8 bInCollection; /* n */ 163 __u8 baInterfaceNr[]; /* [n] */ 164} __attribute__ ((packed)); 165 166#define UAC_DT_AC_HEADER_SIZE(n) (8 + (n)) 167 168/* As above, but more useful for defining your own descriptors: */ 169#define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n) \ 170struct uac1_ac_header_descriptor_##n { \ 171 __u8 bLength; \ 172 __u8 bDescriptorType; \ 173 __u8 bDescriptorSubtype; \ 174 __le16 bcdADC; \ 175 __le16 wTotalLength; \ 176 __u8 bInCollection; \ 177 __u8 baInterfaceNr[n]; \ 178} __attribute__ ((packed)) 179 180/* 4.3.2.1 Input Terminal Descriptor */ 181struct uac_input_terminal_descriptor { 182 __u8 bLength; /* in bytes: 12 */ 183 __u8 bDescriptorType; /* CS_INTERFACE descriptor type */ 184 __u8 bDescriptorSubtype; /* INPUT_TERMINAL descriptor subtype */ 185 __u8 bTerminalID; /* Constant uniquely terminal ID */ 186 __le16 wTerminalType; /* USB Audio Terminal Types */ 187 __u8 bAssocTerminal; /* ID of the Output Terminal associated */ 188 __u8 bNrChannels; /* Number of logical output channels */ 189 __le16 wChannelConfig; 190 __u8 iChannelNames; 191 __u8 iTerminal; 192} __attribute__ ((packed)); 193 194#define UAC_DT_INPUT_TERMINAL_SIZE 12 195 196/* Terminals - 2.2 Input Terminal Types */ 197#define UAC_INPUT_TERMINAL_UNDEFINED 0x200 198#define UAC_INPUT_TERMINAL_MICROPHONE 0x201 199#define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE 0x202 200#define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE 0x203 201#define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE 0x204 202#define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY 0x205 203#define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY 0x206 204 205/* Terminals - control selectors */ 206 207#define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL 0x01 208 209/* 4.3.2.2 Output Terminal Descriptor */ 210struct uac1_output_terminal_descriptor { 211 __u8 bLength; /* in bytes: 9 */ 212 __u8 bDescriptorType; /* CS_INTERFACE descriptor type */ 213 __u8 bDescriptorSubtype; /* OUTPUT_TERMINAL descriptor subtype */ 214 __u8 bTerminalID; /* Constant uniquely terminal ID */ 215 __le16 wTerminalType; /* USB Audio Terminal Types */ 216 __u8 bAssocTerminal; /* ID of the Input Terminal associated */ 217 __u8 bSourceID; /* ID of the connected Unit or Terminal*/ 218 __u8 iTerminal; 219} __attribute__ ((packed)); 220 221#define UAC_DT_OUTPUT_TERMINAL_SIZE 9 222 223/* Terminals - 2.3 Output Terminal Types */ 224#define UAC_OUTPUT_TERMINAL_UNDEFINED 0x300 225#define UAC_OUTPUT_TERMINAL_SPEAKER 0x301 226#define UAC_OUTPUT_TERMINAL_HEADPHONES 0x302 227#define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO 0x303 228#define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER 0x304 229#define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER 0x305 230#define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306 231#define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307 232 233/* Terminals - 2.4 Bi-directional Terminal Types */ 234#define UAC_BIDIR_TERMINAL_UNDEFINED 0x400 235#define UAC_BIDIR_TERMINAL_HANDSET 0x401 236#define UAC_BIDIR_TERMINAL_HEADSET 0x402 237#define UAC_BIDIR_TERMINAL_SPEAKER_PHONE 0x403 238#define UAC_BIDIR_TERMINAL_ECHO_SUPPRESSING 0x404 239#define UAC_BIDIR_TERMINAL_ECHO_CANCELING 0x405 240 241/* Set bControlSize = 2 as default setting */ 242#define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2) 243 244/* As above, but more useful for defining your own descriptors: */ 245#define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch) \ 246struct uac_feature_unit_descriptor_##ch { \ 247 __u8 bLength; \ 248 __u8 bDescriptorType; \ 249 __u8 bDescriptorSubtype; \ 250 __u8 bUnitID; \ 251 __u8 bSourceID; \ 252 __u8 bControlSize; \ 253 __le16 bmaControls[ch + 1]; \ 254 __u8 iFeature; \ 255} __attribute__ ((packed)) 256 257/* 4.3.2.3 Mixer Unit Descriptor */ 258struct uac_mixer_unit_descriptor { 259 __u8 bLength; 260 __u8 bDescriptorType; 261 __u8 bDescriptorSubtype; 262 __u8 bUnitID; 263 __u8 bNrInPins; 264 __u8 baSourceID[]; 265} __attribute__ ((packed)); 266 267static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc) 268{ 269 return desc->baSourceID[desc->bNrInPins]; 270} 271 272static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc, 273 int protocol) 274{ 275 if (protocol == UAC_VERSION_1) 276 return (desc->baSourceID[desc->bNrInPins + 2] << 8) | 277 desc->baSourceID[desc->bNrInPins + 1]; 278 else 279 return (desc->baSourceID[desc->bNrInPins + 4] << 24) | 280 (desc->baSourceID[desc->bNrInPins + 3] << 16) | 281 (desc->baSourceID[desc->bNrInPins + 2] << 8) | 282 (desc->baSourceID[desc->bNrInPins + 1]); 283} 284 285static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc, 286 int protocol) 287{ 288 return (protocol == UAC_VERSION_1) ? 289 desc->baSourceID[desc->bNrInPins + 3] : 290 desc->baSourceID[desc->bNrInPins + 5]; 291} 292 293static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc, 294 int protocol) 295{ 296 switch (protocol) { 297 case UAC_VERSION_1: 298 return &desc->baSourceID[desc->bNrInPins + 4]; 299 case UAC_VERSION_2: 300 return &desc->baSourceID[desc->bNrInPins + 6]; 301 case UAC_VERSION_3: 302 return &desc->baSourceID[desc->bNrInPins + 2]; 303 default: 304 return NULL; 305 } 306} 307 308static inline __u16 uac3_mixer_unit_wClusterDescrID(struct uac_mixer_unit_descriptor *desc) 309{ 310 return (desc->baSourceID[desc->bNrInPins + 1] << 8) | 311 desc->baSourceID[desc->bNrInPins]; 312} 313 314static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc) 315{ 316 __u8 *raw = (__u8 *) desc; 317 return raw[desc->bLength - 1]; 318} 319 320/* 4.3.2.4 Selector Unit Descriptor */ 321struct uac_selector_unit_descriptor { 322 __u8 bLength; 323 __u8 bDescriptorType; 324 __u8 bDescriptorSubtype; 325 __u8 bUintID; 326 __u8 bNrInPins; 327 __u8 baSourceID[]; 328} __attribute__ ((packed)); 329 330static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc) 331{ 332 __u8 *raw = (__u8 *) desc; 333 return raw[desc->bLength - 1]; 334} 335 336/* 4.3.2.5 Feature Unit Descriptor */ 337struct uac_feature_unit_descriptor { 338 __u8 bLength; 339 __u8 bDescriptorType; 340 __u8 bDescriptorSubtype; 341 __u8 bUnitID; 342 __u8 bSourceID; 343 __u8 bControlSize; 344 __u8 bmaControls[]; /* variable length */ 345} __attribute__((packed)); 346 347static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc) 348{ 349 __u8 *raw = (__u8 *) desc; 350 return raw[desc->bLength - 1]; 351} 352 353/* 4.3.2.6 Processing Unit Descriptors */ 354struct uac_processing_unit_descriptor { 355 __u8 bLength; 356 __u8 bDescriptorType; 357 __u8 bDescriptorSubtype; 358 __u8 bUnitID; 359 __le16 wProcessType; 360 __u8 bNrInPins; 361 __u8 baSourceID[]; 362} __attribute__ ((packed)); 363 364static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc) 365{ 366 return desc->baSourceID[desc->bNrInPins]; 367} 368 369static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc, 370 int protocol) 371{ 372 if (protocol == UAC_VERSION_1) 373 return (desc->baSourceID[desc->bNrInPins + 2] << 8) | 374 desc->baSourceID[desc->bNrInPins + 1]; 375 else 376 return (desc->baSourceID[desc->bNrInPins + 4] << 24) | 377 (desc->baSourceID[desc->bNrInPins + 3] << 16) | 378 (desc->baSourceID[desc->bNrInPins + 2] << 8) | 379 (desc->baSourceID[desc->bNrInPins + 1]); 380} 381 382static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc, 383 int protocol) 384{ 385 return (protocol == UAC_VERSION_1) ? 386 desc->baSourceID[desc->bNrInPins + 3] : 387 desc->baSourceID[desc->bNrInPins + 5]; 388} 389 390static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc, 391 int protocol) 392{ 393 switch (protocol) { 394 case UAC_VERSION_1: 395 return desc->baSourceID[desc->bNrInPins + 4]; 396 case UAC_VERSION_2: 397 return 2; /* in UAC2, this value is constant */ 398 case UAC_VERSION_3: 399 return 4; /* in UAC3, this value is constant */ 400 default: 401 return 1; 402 } 403} 404 405static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc, 406 int protocol) 407{ 408 switch (protocol) { 409 case UAC_VERSION_1: 410 return &desc->baSourceID[desc->bNrInPins + 5]; 411 case UAC_VERSION_2: 412 return &desc->baSourceID[desc->bNrInPins + 6]; 413 case UAC_VERSION_3: 414 return &desc->baSourceID[desc->bNrInPins + 2]; 415 default: 416 return NULL; 417 } 418} 419 420static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc, 421 int protocol) 422{ 423 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol); 424 425 switch (protocol) { 426 case UAC_VERSION_1: 427 case UAC_VERSION_2: 428 default: 429 return *(uac_processing_unit_bmControls(desc, protocol) 430 + control_size); 431 case UAC_VERSION_3: 432 return 0; /* UAC3 does not have this field */ 433 } 434} 435 436static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc, 437 int protocol) 438{ 439 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol); 440 441 switch (protocol) { 442 case UAC_VERSION_1: 443 case UAC_VERSION_2: 444 default: 445 return uac_processing_unit_bmControls(desc, protocol) 446 + control_size + 1; 447 case UAC_VERSION_3: 448 return uac_processing_unit_bmControls(desc, protocol) 449 + control_size; 450 } 451} 452 453/* 454 * Extension Unit (XU) has almost compatible layout with Processing Unit, but 455 * on UAC2, it has a different bmControls size (bControlSize); it's 1 byte for 456 * XU while 2 bytes for PU. The last iExtension field is a one-byte index as 457 * well as iProcessing field of PU. 458 */ 459static inline __u8 uac_extension_unit_bControlSize(struct uac_processing_unit_descriptor *desc, 460 int protocol) 461{ 462 switch (protocol) { 463 case UAC_VERSION_1: 464 return desc->baSourceID[desc->bNrInPins + 4]; 465 case UAC_VERSION_2: 466 return 1; /* in UAC2, this value is constant */ 467 case UAC_VERSION_3: 468 return 4; /* in UAC3, this value is constant */ 469 default: 470 return 1; 471 } 472} 473 474static inline __u8 uac_extension_unit_iExtension(struct uac_processing_unit_descriptor *desc, 475 int protocol) 476{ 477 __u8 control_size = uac_extension_unit_bControlSize(desc, protocol); 478 479 switch (protocol) { 480 case UAC_VERSION_1: 481 case UAC_VERSION_2: 482 default: 483 return *(uac_processing_unit_bmControls(desc, protocol) 484 + control_size); 485 case UAC_VERSION_3: 486 return 0; /* UAC3 does not have this field */ 487 } 488} 489 490/* 4.5.2 Class-Specific AS Interface Descriptor */ 491struct uac1_as_header_descriptor { 492 __u8 bLength; /* in bytes: 7 */ 493 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 494 __u8 bDescriptorSubtype; /* AS_GENERAL */ 495 __u8 bTerminalLink; /* Terminal ID of connected Terminal */ 496 __u8 bDelay; /* Delay introduced by the data path */ 497 __le16 wFormatTag; /* The Audio Data Format */ 498} __attribute__ ((packed)); 499 500#define UAC_DT_AS_HEADER_SIZE 7 501 502/* Formats - A.1.1 Audio Data Format Type I Codes */ 503#define UAC_FORMAT_TYPE_I_UNDEFINED 0x0 504#define UAC_FORMAT_TYPE_I_PCM 0x1 505#define UAC_FORMAT_TYPE_I_PCM8 0x2 506#define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3 507#define UAC_FORMAT_TYPE_I_ALAW 0x4 508#define UAC_FORMAT_TYPE_I_MULAW 0x5 509 510struct uac_format_type_i_continuous_descriptor { 511 __u8 bLength; /* in bytes: 8 + (ns * 3) */ 512 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 513 __u8 bDescriptorSubtype; /* FORMAT_TYPE */ 514 __u8 bFormatType; /* FORMAT_TYPE_1 */ 515 __u8 bNrChannels; /* physical channels in the stream */ 516 __u8 bSubframeSize; /* */ 517 __u8 bBitResolution; 518 __u8 bSamFreqType; 519 __u8 tLowerSamFreq[3]; 520 __u8 tUpperSamFreq[3]; 521} __attribute__ ((packed)); 522 523#define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14 524 525struct uac_format_type_i_discrete_descriptor { 526 __u8 bLength; /* in bytes: 8 + (ns * 3) */ 527 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 528 __u8 bDescriptorSubtype; /* FORMAT_TYPE */ 529 __u8 bFormatType; /* FORMAT_TYPE_1 */ 530 __u8 bNrChannels; /* physical channels in the stream */ 531 __u8 bSubframeSize; /* */ 532 __u8 bBitResolution; 533 __u8 bSamFreqType; 534 __u8 tSamFreq[][3]; 535} __attribute__ ((packed)); 536 537#define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \ 538struct uac_format_type_i_discrete_descriptor_##n { \ 539 __u8 bLength; \ 540 __u8 bDescriptorType; \ 541 __u8 bDescriptorSubtype; \ 542 __u8 bFormatType; \ 543 __u8 bNrChannels; \ 544 __u8 bSubframeSize; \ 545 __u8 bBitResolution; \ 546 __u8 bSamFreqType; \ 547 __u8 tSamFreq[n][3]; \ 548} __attribute__ ((packed)) 549 550#define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3)) 551 552struct uac_format_type_i_ext_descriptor { 553 __u8 bLength; 554 __u8 bDescriptorType; 555 __u8 bDescriptorSubtype; 556 __u8 bFormatType; 557 __u8 bSubslotSize; 558 __u8 bBitResolution; 559 __u8 bHeaderLength; 560 __u8 bControlSize; 561 __u8 bSideBandProtocol; 562} __attribute__((packed)); 563 564/* Formats - Audio Data Format Type I Codes */ 565 566#define UAC_FORMAT_TYPE_II_MPEG 0x1001 567#define UAC_FORMAT_TYPE_II_AC3 0x1002 568 569struct uac_format_type_ii_discrete_descriptor { 570 __u8 bLength; 571 __u8 bDescriptorType; 572 __u8 bDescriptorSubtype; 573 __u8 bFormatType; 574 __le16 wMaxBitRate; 575 __le16 wSamplesPerFrame; 576 __u8 bSamFreqType; 577 __u8 tSamFreq[][3]; 578} __attribute__((packed)); 579 580struct uac_format_type_ii_ext_descriptor { 581 __u8 bLength; 582 __u8 bDescriptorType; 583 __u8 bDescriptorSubtype; 584 __u8 bFormatType; 585 __le16 wMaxBitRate; 586 __le16 wSamplesPerFrame; 587 __u8 bHeaderLength; 588 __u8 bSideBandProtocol; 589} __attribute__((packed)); 590 591/* type III */ 592#define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001 593#define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1 0x2002 594#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003 595#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT 0x2004 596#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS 0x2005 597#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS 0x2006 598 599/* Formats - A.2 Format Type Codes */ 600#define UAC_FORMAT_TYPE_UNDEFINED 0x0 601#define UAC_FORMAT_TYPE_I 0x1 602#define UAC_FORMAT_TYPE_II 0x2 603#define UAC_FORMAT_TYPE_III 0x3 604#define UAC_EXT_FORMAT_TYPE_I 0x81 605#define UAC_EXT_FORMAT_TYPE_II 0x82 606#define UAC_EXT_FORMAT_TYPE_III 0x83 607 608struct uac_iso_endpoint_descriptor { 609 __u8 bLength; /* in bytes: 7 */ 610 __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */ 611 __u8 bDescriptorSubtype; /* EP_GENERAL */ 612 __u8 bmAttributes; 613 __u8 bLockDelayUnits; 614 __le16 wLockDelay; 615} __attribute__((packed)); 616#define UAC_ISO_ENDPOINT_DESC_SIZE 7 617 618#define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01 619#define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02 620#define UAC_EP_CS_ATTR_FILL_MAX 0x80 621 622/* status word format (3.7.1.1) */ 623 624#define UAC1_STATUS_TYPE_ORIG_MASK 0x0f 625#define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF 0x0 626#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF 0x1 627#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP 0x2 628 629#define UAC1_STATUS_TYPE_IRQ_PENDING (1 << 7) 630#define UAC1_STATUS_TYPE_MEM_CHANGED (1 << 6) 631 632struct uac1_status_word { 633 __u8 bStatusType; 634 __u8 bOriginator; 635} __attribute__((packed)); 636 637 638#endif /* _UAPI__LINUX_USB_AUDIO_H */ 639