1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (c) 2010 Daniel Mack <daniel@caiaq.de> 4 * 5 * This software is distributed under the terms of the GNU General Public 6 * License ("GPL") version 2, as published by the Free Software Foundation. 7 * 8 * This file holds USB constants and structures defined 9 * by the USB Device Class Definition for Audio Devices in version 2.0. 10 * Comments below reference relevant sections of the documents contained 11 * in http://www.usb.org/developers/devclass_docs/Audio2.0_final.zip 12 */ 13 14#ifndef __LINUX_USB_AUDIO_V2_H 15#define __LINUX_USB_AUDIO_V2_H 16 17#include <linux/types.h> 18 19/* v1.0 and v2.0 of this standard have many things in common. For the rest 20 * of the definitions, please refer to audio.h */ 21 22/* 23 * bmControl field decoders 24 * 25 * From the USB Audio spec v2.0: 26 * 27 * bmaControls() is a (ch+1)-element array of 4-byte bitmaps, 28 * each containing a set of bit pairs. If a Control is present, 29 * it must be Host readable. If a certain Control is not 30 * present then the bit pair must be set to 0b00. 31 * If a Control is present but read-only, the bit pair must be 32 * set to 0b01. If a Control is also Host programmable, the bit 33 * pair must be set to 0b11. The value 0b10 is not allowed. 34 * 35 */ 36 37static inline bool uac_v2v3_control_is_readable(u32 bmControls, u8 control) 38{ 39 return (bmControls >> ((control - 1) * 2)) & 0x1; 40} 41 42static inline bool uac_v2v3_control_is_writeable(u32 bmControls, u8 control) 43{ 44 return (bmControls >> ((control - 1) * 2)) & 0x2; 45} 46 47/* 4.7.2 Class-Specific AC Interface Descriptor */ 48struct uac2_ac_header_descriptor { 49 __u8 bLength; /* 9 */ 50 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 51 __u8 bDescriptorSubtype; /* UAC_MS_HEADER */ 52 __le16 bcdADC; /* 0x0200 */ 53 __u8 bCategory; 54 __le16 wTotalLength; /* includes Unit and Terminal desc. */ 55 __u8 bmControls; 56} __packed; 57 58/* 2.3.1.6 Type I Format Type Descriptor (Frmts20 final.pdf)*/ 59struct uac2_format_type_i_descriptor { 60 __u8 bLength; /* in bytes: 6 */ 61 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 62 __u8 bDescriptorSubtype; /* FORMAT_TYPE */ 63 __u8 bFormatType; /* FORMAT_TYPE_1 */ 64 __u8 bSubslotSize; /* {1,2,3,4} */ 65 __u8 bBitResolution; 66} __packed; 67 68/* 4.7.2.1 Clock Source Descriptor */ 69 70struct uac_clock_source_descriptor { 71 __u8 bLength; 72 __u8 bDescriptorType; 73 __u8 bDescriptorSubtype; 74 __u8 bClockID; 75 __u8 bmAttributes; 76 __u8 bmControls; 77 __u8 bAssocTerminal; 78 __u8 iClockSource; 79} __attribute__((packed)); 80 81/* bmAttribute fields */ 82#define UAC_CLOCK_SOURCE_TYPE_EXT 0x0 83#define UAC_CLOCK_SOURCE_TYPE_INT_FIXED 0x1 84#define UAC_CLOCK_SOURCE_TYPE_INT_VAR 0x2 85#define UAC_CLOCK_SOURCE_TYPE_INT_PROG 0x3 86#define UAC_CLOCK_SOURCE_SYNCED_TO_SOF (1 << 2) 87 88/* 4.7.2.2 Clock Source Descriptor */ 89 90struct uac_clock_selector_descriptor { 91 __u8 bLength; 92 __u8 bDescriptorType; 93 __u8 bDescriptorSubtype; 94 __u8 bClockID; 95 __u8 bNrInPins; 96 __u8 baCSourceID[]; 97 /* bmControls and iClockSource omitted */ 98} __attribute__((packed)); 99 100/* 4.7.2.3 Clock Multiplier Descriptor */ 101 102struct uac_clock_multiplier_descriptor { 103 __u8 bLength; 104 __u8 bDescriptorType; 105 __u8 bDescriptorSubtype; 106 __u8 bClockID; 107 __u8 bCSourceID; 108 __u8 bmControls; 109 __u8 iClockMultiplier; 110} __attribute__((packed)); 111 112/* 4.7.2.4 Input terminal descriptor */ 113 114struct uac2_input_terminal_descriptor { 115 __u8 bLength; 116 __u8 bDescriptorType; 117 __u8 bDescriptorSubtype; 118 __u8 bTerminalID; 119 __le16 wTerminalType; 120 __u8 bAssocTerminal; 121 __u8 bCSourceID; 122 __u8 bNrChannels; 123 __le32 bmChannelConfig; 124 __u8 iChannelNames; 125 __le16 bmControls; 126 __u8 iTerminal; 127} __attribute__((packed)); 128 129/* 4.7.2.5 Output terminal descriptor */ 130 131struct uac2_output_terminal_descriptor { 132 __u8 bLength; 133 __u8 bDescriptorType; 134 __u8 bDescriptorSubtype; 135 __u8 bTerminalID; 136 __le16 wTerminalType; 137 __u8 bAssocTerminal; 138 __u8 bSourceID; 139 __u8 bCSourceID; 140 __le16 bmControls; 141 __u8 iTerminal; 142} __attribute__((packed)); 143 144 145 146/* 4.7.2.8 Feature Unit Descriptor */ 147 148struct uac2_feature_unit_descriptor { 149 __u8 bLength; 150 __u8 bDescriptorType; 151 __u8 bDescriptorSubtype; 152 __u8 bUnitID; 153 __u8 bSourceID; 154 /* bmaControls is actually u32, 155 * but u8 is needed for the hybrid parser */ 156 __u8 bmaControls[0]; /* variable length */ 157} __attribute__((packed)); 158 159/* 4.9.2 Class-Specific AS Interface Descriptor */ 160 161struct uac2_as_header_descriptor { 162 __u8 bLength; 163 __u8 bDescriptorType; 164 __u8 bDescriptorSubtype; 165 __u8 bTerminalLink; 166 __u8 bmControls; 167 __u8 bFormatType; 168 __le32 bmFormats; 169 __u8 bNrChannels; 170 __le32 bmChannelConfig; 171 __u8 iChannelNames; 172} __attribute__((packed)); 173 174#define UAC2_FORMAT_TYPE_I_RAW_DATA (1 << 31) 175 176/* 4.10.1.2 Class-Specific AS Isochronous Audio Data Endpoint Descriptor */ 177 178struct uac2_iso_endpoint_descriptor { 179 __u8 bLength; /* in bytes: 8 */ 180 __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */ 181 __u8 bDescriptorSubtype; /* EP_GENERAL */ 182 __u8 bmAttributes; 183 __u8 bmControls; 184 __u8 bLockDelayUnits; 185 __le16 wLockDelay; 186} __attribute__((packed)); 187 188#define UAC2_CONTROL_PITCH (3 << 0) 189#define UAC2_CONTROL_DATA_OVERRUN (3 << 2) 190#define UAC2_CONTROL_DATA_UNDERRUN (3 << 4) 191 192/* 5.2.5.4.2 Connector Control Parameter Block */ 193struct uac2_connectors_ctl_blk { 194 __u8 bNrChannels; 195 __le32 bmChannelConfig; 196 __u8 iChannelNames; 197} __attribute__((packed)); 198 199/* 6.1 Interrupt Data Message */ 200 201#define UAC2_INTERRUPT_DATA_MSG_VENDOR (1 << 0) 202#define UAC2_INTERRUPT_DATA_MSG_EP (1 << 1) 203 204struct uac2_interrupt_data_msg { 205 __u8 bInfo; 206 __u8 bAttribute; 207 __le16 wValue; 208 __le16 wIndex; 209} __attribute__((packed)); 210 211/* A.7 Audio Function Category Codes */ 212#define UAC2_FUNCTION_SUBCLASS_UNDEFINED 0x00 213#define UAC2_FUNCTION_DESKTOP_SPEAKER 0x01 214#define UAC2_FUNCTION_HOME_THEATER 0x02 215#define UAC2_FUNCTION_MICROPHONE 0x03 216#define UAC2_FUNCTION_HEADSET 0x04 217#define UAC2_FUNCTION_TELEPHONE 0x05 218#define UAC2_FUNCTION_CONVERTER 0x06 219#define UAC2_FUNCTION_SOUND_RECORDER 0x07 220#define UAC2_FUNCTION_IO_BOX 0x08 221#define UAC2_FUNCTION_MUSICAL_INSTRUMENT 0x09 222#define UAC2_FUNCTION_PRO_AUDIO 0x0a 223#define UAC2_FUNCTION_AUDIO_VIDEO 0x0b 224#define UAC2_FUNCTION_CONTROL_PANEL 0x0c 225#define UAC2_FUNCTION_OTHER 0xff 226 227/* A.9 Audio Class-Specific AC Interface Descriptor Subtypes */ 228/* see audio.h for the rest, which is identical to v1 */ 229#define UAC2_EFFECT_UNIT 0x07 230#define UAC2_PROCESSING_UNIT_V2 0x08 231#define UAC2_EXTENSION_UNIT_V2 0x09 232#define UAC2_CLOCK_SOURCE 0x0a 233#define UAC2_CLOCK_SELECTOR 0x0b 234#define UAC2_CLOCK_MULTIPLIER 0x0c 235#define UAC2_SAMPLE_RATE_CONVERTER 0x0d 236 237/* A.10 Audio Class-Specific AS Interface Descriptor Subtypes */ 238/* see audio.h for the rest, which is identical to v1 */ 239#define UAC2_ENCODER 0x03 240#define UAC2_DECODER 0x04 241 242/* A.11 Effect Unit Effect Types */ 243#define UAC2_EFFECT_UNDEFINED 0x00 244#define UAC2_EFFECT_PARAM_EQ 0x01 245#define UAC2_EFFECT_REVERB 0x02 246#define UAC2_EFFECT_MOD_DELAY 0x03 247#define UAC2_EFFECT_DYN_RANGE_COMP 0x04 248 249/* A.12 Processing Unit Process Types */ 250#define UAC2_PROCESS_UNDEFINED 0x00 251#define UAC2_PROCESS_UP_DOWNMIX 0x01 252#define UAC2_PROCESS_DOLBY_PROLOCIC 0x02 253#define UAC2_PROCESS_STEREO_EXTENDER 0x03 254 255/* A.14 Audio Class-Specific Request Codes */ 256#define UAC2_CS_CUR 0x01 257#define UAC2_CS_RANGE 0x02 258#define UAC2_CS_MEM 0x03 259 260/* A.15 Encoder Type Codes */ 261#define UAC2_ENCODER_UNDEFINED 0x00 262#define UAC2_ENCODER_OTHER 0x01 263#define UAC2_ENCODER_MPEG 0x02 264#define UAC2_ENCODER_AC3 0x03 265#define UAC2_ENCODER_WMA 0x04 266#define UAC2_ENCODER_DTS 0x05 267 268/* A.16 Decoder Type Codes */ 269#define UAC2_DECODER_UNDEFINED 0x00 270#define UAC2_DECODER_OTHER 0x01 271#define UAC2_DECODER_MPEG 0x02 272#define UAC2_DECODER_AC3 0x03 273#define UAC2_DECODER_WMA 0x04 274#define UAC2_DECODER_DTS 0x05 275 276/* A.17.1 Clock Source Control Selectors */ 277#define UAC2_CS_UNDEFINED 0x00 278#define UAC2_CS_CONTROL_SAM_FREQ 0x01 279#define UAC2_CS_CONTROL_CLOCK_VALID 0x02 280 281/* A.17.2 Clock Selector Control Selectors */ 282#define UAC2_CX_UNDEFINED 0x00 283#define UAC2_CX_CLOCK_SELECTOR 0x01 284 285/* A.17.3 Clock Multiplier Control Selectors */ 286#define UAC2_CM_UNDEFINED 0x00 287#define UAC2_CM_NUMERATOR 0x01 288#define UAC2_CM_DENOMINTATOR 0x02 289 290/* A.17.4 Terminal Control Selectors */ 291#define UAC2_TE_UNDEFINED 0x00 292#define UAC2_TE_COPY_PROTECT 0x01 293#define UAC2_TE_CONNECTOR 0x02 294#define UAC2_TE_OVERLOAD 0x03 295#define UAC2_TE_CLUSTER 0x04 296#define UAC2_TE_UNDERFLOW 0x05 297#define UAC2_TE_OVERFLOW 0x06 298#define UAC2_TE_LATENCY 0x07 299 300/* A.17.5 Mixer Control Selectors */ 301#define UAC2_MU_UNDEFINED 0x00 302#define UAC2_MU_MIXER 0x01 303#define UAC2_MU_CLUSTER 0x02 304#define UAC2_MU_UNDERFLOW 0x03 305#define UAC2_MU_OVERFLOW 0x04 306#define UAC2_MU_LATENCY 0x05 307 308/* A.17.6 Selector Control Selectors */ 309#define UAC2_SU_UNDEFINED 0x00 310#define UAC2_SU_SELECTOR 0x01 311#define UAC2_SU_LATENCY 0x02 312 313/* A.17.7 Feature Unit Control Selectors */ 314/* see audio.h for the rest, which is identical to v1 */ 315#define UAC2_FU_INPUT_GAIN 0x0b 316#define UAC2_FU_INPUT_GAIN_PAD 0x0c 317#define UAC2_FU_PHASE_INVERTER 0x0d 318#define UAC2_FU_UNDERFLOW 0x0e 319#define UAC2_FU_OVERFLOW 0x0f 320#define UAC2_FU_LATENCY 0x10 321 322/* A.17.8.1 Parametric Equalizer Section Effect Unit Control Selectors */ 323#define UAC2_PE_UNDEFINED 0x00 324#define UAC2_PE_ENABLE 0x01 325#define UAC2_PE_CENTERFREQ 0x02 326#define UAC2_PE_QFACTOR 0x03 327#define UAC2_PE_GAIN 0x04 328#define UAC2_PE_UNDERFLOW 0x05 329#define UAC2_PE_OVERFLOW 0x06 330#define UAC2_PE_LATENCY 0x07 331 332/* A.17.8.2 Reverberation Effect Unit Control Selectors */ 333#define UAC2_RV_UNDEFINED 0x00 334#define UAC2_RV_ENABLE 0x01 335#define UAC2_RV_TYPE 0x02 336#define UAC2_RV_LEVEL 0x03 337#define UAC2_RV_TIME 0x04 338#define UAC2_RV_FEEDBACK 0x05 339#define UAC2_RV_PREDELAY 0x06 340#define UAC2_RV_DENSITY 0x07 341#define UAC2_RV_HIFREQ_ROLLOFF 0x08 342#define UAC2_RV_UNDERFLOW 0x09 343#define UAC2_RV_OVERFLOW 0x0a 344#define UAC2_RV_LATENCY 0x0b 345 346/* A.17.8.3 Modulation Delay Effect Control Selectors */ 347#define UAC2_MD_UNDEFINED 0x00 348#define UAC2_MD_ENABLE 0x01 349#define UAC2_MD_BALANCE 0x02 350#define UAC2_MD_RATE 0x03 351#define UAC2_MD_DEPTH 0x04 352#define UAC2_MD_TIME 0x05 353#define UAC2_MD_FEEDBACK 0x06 354#define UAC2_MD_UNDERFLOW 0x07 355#define UAC2_MD_OVERFLOW 0x08 356#define UAC2_MD_LATENCY 0x09 357 358/* A.17.8.4 Dynamic Range Compressor Effect Unit Control Selectors */ 359#define UAC2_DR_UNDEFINED 0x00 360#define UAC2_DR_ENABLE 0x01 361#define UAC2_DR_COMPRESSION_RATE 0x02 362#define UAC2_DR_MAXAMPL 0x03 363#define UAC2_DR_THRESHOLD 0x04 364#define UAC2_DR_ATTACK_TIME 0x05 365#define UAC2_DR_RELEASE_TIME 0x06 366#define UAC2_DR_UNDEFLOW 0x07 367#define UAC2_DR_OVERFLOW 0x08 368#define UAC2_DR_LATENCY 0x09 369 370/* A.17.9.1 Up/Down-mix Processing Unit Control Selectors */ 371#define UAC2_UD_UNDEFINED 0x00 372#define UAC2_UD_ENABLE 0x01 373#define UAC2_UD_MODE_SELECT 0x02 374#define UAC2_UD_CLUSTER 0x03 375#define UAC2_UD_UNDERFLOW 0x04 376#define UAC2_UD_OVERFLOW 0x05 377#define UAC2_UD_LATENCY 0x06 378 379/* A.17.9.2 Dolby Prologic[tm] Processing Unit Control Selectors */ 380#define UAC2_DP_UNDEFINED 0x00 381#define UAC2_DP_ENABLE 0x01 382#define UAC2_DP_MODE_SELECT 0x02 383#define UAC2_DP_CLUSTER 0x03 384#define UAC2_DP_UNDERFFLOW 0x04 385#define UAC2_DP_OVERFLOW 0x05 386#define UAC2_DP_LATENCY 0x06 387 388/* A.17.9.3 Stereo Expander Processing Unit Control Selectors */ 389#define UAC2_ST_EXT_UNDEFINED 0x00 390#define UAC2_ST_EXT_ENABLE 0x01 391#define UAC2_ST_EXT_WIDTH 0x02 392#define UAC2_ST_EXT_UNDEFLOW 0x03 393#define UAC2_ST_EXT_OVERFLOW 0x04 394#define UAC2_ST_EXT_LATENCY 0x05 395 396/* A.17.10 Extension Unit Control Selectors */ 397#define UAC2_XU_UNDEFINED 0x00 398#define UAC2_XU_ENABLE 0x01 399#define UAC2_XU_CLUSTER 0x02 400#define UAC2_XU_UNDERFLOW 0x03 401#define UAC2_XU_OVERFLOW 0x04 402#define UAC2_XU_LATENCY 0x05 403 404/* A.17.11 AudioStreaming Interface Control Selectors */ 405#define UAC2_AS_UNDEFINED 0x00 406#define UAC2_AS_ACT_ALT_SETTING 0x01 407#define UAC2_AS_VAL_ALT_SETTINGS 0x02 408#define UAC2_AS_AUDIO_DATA_FORMAT 0x03 409 410/* A.17.12 Encoder Control Selectors */ 411#define UAC2_EN_UNDEFINED 0x00 412#define UAC2_EN_BIT_RATE 0x01 413#define UAC2_EN_QUALITY 0x02 414#define UAC2_EN_VBR 0x03 415#define UAC2_EN_TYPE 0x04 416#define UAC2_EN_UNDERFLOW 0x05 417#define UAC2_EN_OVERFLOW 0x06 418#define UAC2_EN_ENCODER_ERROR 0x07 419#define UAC2_EN_PARAM1 0x08 420#define UAC2_EN_PARAM2 0x09 421#define UAC2_EN_PARAM3 0x0a 422#define UAC2_EN_PARAM4 0x0b 423#define UAC2_EN_PARAM5 0x0c 424#define UAC2_EN_PARAM6 0x0d 425#define UAC2_EN_PARAM7 0x0e 426#define UAC2_EN_PARAM8 0x0f 427 428/* A.17.13.1 MPEG Decoder Control Selectors */ 429#define UAC2_MPEG_UNDEFINED 0x00 430#define UAC2_MPEG_DUAL_CHANNEL 0x01 431#define UAC2_MPEG_SECOND_STEREO 0x02 432#define UAC2_MPEG_MULTILINGUAL 0x03 433#define UAC2_MPEG_DYN_RANGE 0x04 434#define UAC2_MPEG_SCALING 0x05 435#define UAC2_MPEG_HILO_SCALING 0x06 436#define UAC2_MPEG_UNDERFLOW 0x07 437#define UAC2_MPEG_OVERFLOW 0x08 438#define UAC2_MPEG_DECODER_ERROR 0x09 439 440/* A17.13.2 AC3 Decoder Control Selectors */ 441#define UAC2_AC3_UNDEFINED 0x00 442#define UAC2_AC3_MODE 0x01 443#define UAC2_AC3_DYN_RANGE 0x02 444#define UAC2_AC3_SCALING 0x03 445#define UAC2_AC3_HILO_SCALING 0x04 446#define UAC2_AC3_UNDERFLOW 0x05 447#define UAC2_AC3_OVERFLOW 0x06 448#define UAC2_AC3_DECODER_ERROR 0x07 449 450/* A17.13.3 WMA Decoder Control Selectors */ 451#define UAC2_WMA_UNDEFINED 0x00 452#define UAC2_WMA_UNDERFLOW 0x01 453#define UAC2_WMA_OVERFLOW 0x02 454#define UAC2_WMA_DECODER_ERROR 0x03 455 456/* A17.13.4 DTS Decoder Control Selectors */ 457#define UAC2_DTS_UNDEFINED 0x00 458#define UAC2_DTS_UNDERFLOW 0x01 459#define UAC2_DTS_OVERFLOW 0x02 460#define UAC2_DTS_DECODER_ERROR 0x03 461 462/* A17.14 Endpoint Control Selectors */ 463#define UAC2_EP_CS_UNDEFINED 0x00 464#define UAC2_EP_CS_PITCH 0x01 465#define UAC2_EP_CS_DATA_OVERRUN 0x02 466#define UAC2_EP_CS_DATA_UNDERRUN 0x03 467 468#endif /* __LINUX_USB_AUDIO_V2_H */ 469 470