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