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 (at) 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 _UAPI__LINUX_USB_AUDIO_H 22 #define _UAPI__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 */ 154 struct 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) \ 168 struct 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 */ 179 struct 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 */ 208 struct 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) \ 236 struct 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 */ 248 struct 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)); 256 257 static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc) 258 { 259 return desc->baSourceID[desc->bNrInPins]; 260 } 261 262 static 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 } 274 275 static 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 } 282 283 static 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 } 290 291 static 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 */ 298 struct 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)); 306 307 static 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 */ 314 struct 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)); 323 324 static 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 */ 331 struct 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)); 340 341 static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc) 342 { 343 return desc->baSourceID[desc->bNrInPins]; 344 } 345 346 static 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 } 358 359 static 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 } 366 367 static 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 } 374 375 static 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 } 382 383 static 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 *(uac_processing_unit_bmControls(desc, protocol) 388 + control_size); 389 } 390 391 static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc, 392 int protocol) 393 { 394 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol); 395 return uac_processing_unit_bmControls(desc, protocol) 396 + control_size + 1; 397 } 398 399 /* 4.5.2 Class-Specific AS Interface Descriptor */ 400 struct uac1_as_header_descriptor { 401 __u8 bLength; /* in bytes: 7 */ 402 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 403 __u8 bDescriptorSubtype; /* AS_GENERAL */ 404 __u8 bTerminalLink; /* Terminal ID of connected Terminal */ 405 __u8 bDelay; /* Delay introduced by the data path */ 406 __le16 wFormatTag; /* The Audio Data Format */ 407 } __attribute__ ((packed)); 408 409 #define UAC_DT_AS_HEADER_SIZE 7 410 411 /* Formats - A.1.1 Audio Data Format Type I Codes */ 412 #define UAC_FORMAT_TYPE_I_UNDEFINED 0x0 413 #define UAC_FORMAT_TYPE_I_PCM 0x1 414 #define UAC_FORMAT_TYPE_I_PCM8 0x2 415 #define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3 416 #define UAC_FORMAT_TYPE_I_ALAW 0x4 417 #define UAC_FORMAT_TYPE_I_MULAW 0x5 418 419 struct uac_format_type_i_continuous_descriptor { 420 __u8 bLength; /* in bytes: 8 + (ns * 3) */ 421 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 422 __u8 bDescriptorSubtype; /* FORMAT_TYPE */ 423 __u8 bFormatType; /* FORMAT_TYPE_1 */ 424 __u8 bNrChannels; /* physical channels in the stream */ 425 __u8 bSubframeSize; /* */ 426 __u8 bBitResolution; 427 __u8 bSamFreqType; 428 __u8 tLowerSamFreq[3]; 429 __u8 tUpperSamFreq[3]; 430 } __attribute__ ((packed)); 431 432 #define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14 433 434 struct uac_format_type_i_discrete_descriptor { 435 __u8 bLength; /* in bytes: 8 + (ns * 3) */ 436 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 437 __u8 bDescriptorSubtype; /* FORMAT_TYPE */ 438 __u8 bFormatType; /* FORMAT_TYPE_1 */ 439 __u8 bNrChannels; /* physical channels in the stream */ 440 __u8 bSubframeSize; /* */ 441 __u8 bBitResolution; 442 __u8 bSamFreqType; 443 __u8 tSamFreq[][3]; 444 } __attribute__ ((packed)); 445 446 #define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \ 447 struct uac_format_type_i_discrete_descriptor_##n { \ 448 __u8 bLength; \ 449 __u8 bDescriptorType; \ 450 __u8 bDescriptorSubtype; \ 451 __u8 bFormatType; \ 452 __u8 bNrChannels; \ 453 __u8 bSubframeSize; \ 454 __u8 bBitResolution; \ 455 __u8 bSamFreqType; \ 456 __u8 tSamFreq[n][3]; \ 457 } __attribute__ ((packed)) 458 459 #define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3)) 460 461 struct uac_format_type_i_ext_descriptor { 462 __u8 bLength; 463 __u8 bDescriptorType; 464 __u8 bDescriptorSubtype; 465 __u8 bFormatType; 466 __u8 bSubslotSize; 467 __u8 bBitResolution; 468 __u8 bHeaderLength; 469 __u8 bControlSize; 470 __u8 bSideBandProtocol; 471 } __attribute__((packed)); 472 473 /* Formats - Audio Data Format Type I Codes */ 474 475 #define UAC_FORMAT_TYPE_II_MPEG 0x1001 476 #define UAC_FORMAT_TYPE_II_AC3 0x1002 477 478 struct uac_format_type_ii_discrete_descriptor { 479 __u8 bLength; 480 __u8 bDescriptorType; 481 __u8 bDescriptorSubtype; 482 __u8 bFormatType; 483 __le16 wMaxBitRate; 484 __le16 wSamplesPerFrame; 485 __u8 bSamFreqType; 486 __u8 tSamFreq[][3]; 487 } __attribute__((packed)); 488 489 struct uac_format_type_ii_ext_descriptor { 490 __u8 bLength; 491 __u8 bDescriptorType; 492 __u8 bDescriptorSubtype; 493 __u8 bFormatType; 494 __u16 wMaxBitRate; 495 __u16 wSamplesPerFrame; 496 __u8 bHeaderLength; 497 __u8 bSideBandProtocol; 498 } __attribute__((packed)); 499 500 /* type III */ 501 #define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001 502 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1 0x2002 503 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003 504 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT 0x2004 505 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS 0x2005 506 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS 0x2006 507 508 /* Formats - A.2 Format Type Codes */ 509 #define UAC_FORMAT_TYPE_UNDEFINED 0x0 510 #define UAC_FORMAT_TYPE_I 0x1 511 #define UAC_FORMAT_TYPE_II 0x2 512 #define UAC_FORMAT_TYPE_III 0x3 513 #define UAC_EXT_FORMAT_TYPE_I 0x81 514 #define UAC_EXT_FORMAT_TYPE_II 0x82 515 #define UAC_EXT_FORMAT_TYPE_III 0x83 516 517 struct uac_iso_endpoint_descriptor { 518 __u8 bLength; /* in bytes: 7 */ 519 __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */ 520 __u8 bDescriptorSubtype; /* EP_GENERAL */ 521 __u8 bmAttributes; 522 __u8 bLockDelayUnits; 523 __le16 wLockDelay; 524 } __attribute__((packed)); 525 #define UAC_ISO_ENDPOINT_DESC_SIZE 7 526 527 #define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01 528 #define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02 529 #define UAC_EP_CS_ATTR_FILL_MAX 0x80 530 531 /* status word format (3.7.1.1) */ 532 533 #define UAC1_STATUS_TYPE_ORIG_MASK 0x0f 534 #define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF 0x0 535 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF 0x1 536 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP 0x2 537 538 #define UAC1_STATUS_TYPE_IRQ_PENDING (1 << 7) 539 #define UAC1_STATUS_TYPE_MEM_CHANGED (1 << 6) 540 541 struct uac1_status_word { 542 __u8 bStatusType; 543 __u8 bOriginator; 544 } __attribute__((packed)); 545 546 547 #endif /* _UAPI__LINUX_USB_AUDIO_H */ 548
