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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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* <linux/usb/audio.h> -- USB Audio definitions.

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* Developed for Thumtronics by Grey Innovation

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* Ben Williamson <ben.williamson@greyinnovation.com>

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* This software is distributed under the terms of the GNU General Public

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* License ("GPL") version 2, as published by the Free Software Foundation.

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* This file holds USB constants and structures defined

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* by the USB Device Class Definition for Audio Devices.

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* Comments below reference relevant sections of that document:

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* http://www.usb.org/developers/devclass_docs/audio10.pdf

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* Types and defines in this file are either specific to version 1.0 of

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* this standard or common for newer versions.

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#ifndef __LINUX_USB_AUDIO_H

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#define __LINUX_USB_AUDIO_H

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#include <linux/types.h>

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/* bInterfaceProtocol values to denote the version of the standard used */

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#define UAC_VERSION_1 0x00

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#define UAC_VERSION_2 0x20

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#define UAC_VERSION_3 0x30

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/* A.2 Audio Interface Subclass Codes */

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#define USB_SUBCLASS_AUDIOCONTROL 0x01

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#define USB_SUBCLASS_AUDIOSTREAMING 0x02

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#define USB_SUBCLASS_MIDISTREAMING 0x03

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/* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */

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#define UAC_HEADER 0x01

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#define UAC_INPUT_TERMINAL 0x02

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#define UAC_OUTPUT_TERMINAL 0x03

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#define UAC_MIXER_UNIT 0x04

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#define UAC_SELECTOR_UNIT 0x05

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#define UAC_FEATURE_UNIT 0x06

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#define UAC1_PROCESSING_UNIT 0x07

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#define UAC1_EXTENSION_UNIT 0x08

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/* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */

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#define UAC_AS_GENERAL 0x01

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#define UAC_FORMAT_TYPE 0x02

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#define UAC_FORMAT_SPECIFIC 0x03

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/* A.7 Processing Unit Process Types */

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#define UAC_PROCESS_UNDEFINED 0x00

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#define UAC_PROCESS_UP_DOWNMIX 0x01

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#define UAC_PROCESS_DOLBY_PROLOGIC 0x02

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#define UAC_PROCESS_STEREO_EXTENDER 0x03

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#define UAC_PROCESS_REVERB 0x04

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#define UAC_PROCESS_CHORUS 0x05

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#define UAC_PROCESS_DYN_RANGE_COMP 0x06

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/* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */

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#define UAC_EP_GENERAL 0x01

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/* A.9 Audio Class-Specific Request Codes */

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#define UAC_SET_ 0x00

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#define UAC_GET_ 0x80

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#define UAC__CUR 0x1

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#define UAC__MIN 0x2

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#define UAC__MAX 0x3

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#define UAC__RES 0x4

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#define UAC__MEM 0x5

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#define UAC_SET_CUR (UAC_SET_ | UAC__CUR)

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#define UAC_GET_CUR (UAC_GET_ | UAC__CUR)

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#define UAC_SET_MIN (UAC_SET_ | UAC__MIN)

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#define UAC_GET_MIN (UAC_GET_ | UAC__MIN)

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#define UAC_SET_MAX (UAC_SET_ | UAC__MAX)

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#define UAC_GET_MAX (UAC_GET_ | UAC__MAX)

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#define UAC_SET_RES (UAC_SET_ | UAC__RES)

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#define UAC_GET_RES (UAC_GET_ | UAC__RES)

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#define UAC_SET_MEM (UAC_SET_ | UAC__MEM)

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#define UAC_GET_MEM (UAC_GET_ | UAC__MEM)

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#define UAC_GET_STAT 0xff

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/* A.10 Control Selector Codes */

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/* A.10.1 Terminal Control Selectors */

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#define UAC_TERM_COPY_PROTECT 0x01

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/* A.10.2 Feature Unit Control Selectors */

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#define UAC_FU_MUTE 0x01

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#define UAC_FU_VOLUME 0x02

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#define UAC_FU_BASS 0x03

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#define UAC_FU_MID 0x04

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#define UAC_FU_TREBLE 0x05

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#define UAC_FU_GRAPHIC_EQUALIZER 0x06

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#define UAC_FU_AUTOMATIC_GAIN 0x07

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#define UAC_FU_DELAY 0x08

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#define UAC_FU_BASS_BOOST 0x09

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#define UAC_FU_LOUDNESS 0x0a

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#define UAC_CONTROL_BIT(CS) (1 << ((CS) - 1))

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/* A.10.3.1 Up/Down-mix Processing Unit Controls Selectors */

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#define UAC_UD_ENABLE 0x01

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#define UAC_UD_MODE_SELECT 0x02

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/* A.10.3.2 Dolby Prologic (tm) Processing Unit Controls Selectors */

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#define UAC_DP_ENABLE 0x01

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#define UAC_DP_MODE_SELECT 0x02

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/* A.10.3.3 3D Stereo Extender Processing Unit Control Selectors */

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#define UAC_3D_ENABLE 0x01

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#define UAC_3D_SPACE 0x02

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/* A.10.3.4 Reverberation Processing Unit Control Selectors */

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#define UAC_REVERB_ENABLE 0x01

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#define UAC_REVERB_LEVEL 0x02

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#define UAC_REVERB_TIME 0x03

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#define UAC_REVERB_FEEDBACK 0x04

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/* A.10.3.5 Chorus Processing Unit Control Selectors */

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#define UAC_CHORUS_ENABLE 0x01

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#define UAC_CHORUS_LEVEL 0x02

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#define UAC_CHORUS_RATE 0x03

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#define UAC_CHORUS_DEPTH 0x04

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/* A.10.3.6 Dynamic Range Compressor Unit Control Selectors */

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#define UAC_DCR_ENABLE 0x01

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#define UAC_DCR_RATE 0x02

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#define UAC_DCR_MAXAMPL 0x03

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#define UAC_DCR_THRESHOLD 0x04

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#define UAC_DCR_ATTACK_TIME 0x05

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#define UAC_DCR_RELEASE_TIME 0x06

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/* A.10.4 Extension Unit Control Selectors */

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#define UAC_XU_ENABLE 0x01

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/* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */

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#define UAC_MS_HEADER 0x01

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#define UAC_MIDI_IN_JACK 0x02

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#define UAC_MIDI_OUT_JACK 0x03

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/* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */

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#define UAC_MS_GENERAL 0x01

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/* Terminals - 2.1 USB Terminal Types */

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#define UAC_TERMINAL_UNDEFINED 0x100

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#define UAC_TERMINAL_STREAMING 0x101

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#define UAC_TERMINAL_VENDOR_SPEC 0x1FF

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/* Terminal Control Selectors */

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/* 4.3.2 Class-Specific AC Interface Descriptor */

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struct uac1_ac_header_descriptor {

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__u8 bLength; /* 8 + n */

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__u8 bDescriptorType; /* USB_DT_CS_INTERFACE */

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__u8 bDescriptorSubtype; /* UAC_MS_HEADER */

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__le16 bcdADC; /* 0x0100 */

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__le16 wTotalLength; /* includes Unit and Terminal desc. */

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__u8 bInCollection; /* n */

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__u8 baInterfaceNr[]; /* [n] */

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} __attribute__ ((packed));

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#define UAC_DT_AC_HEADER_SIZE(n) (8 + (n))

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/* As above, but more useful for defining your own descriptors: */

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#define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n) \

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struct uac1_ac_header_descriptor_##n { \

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__u8 bLength; \

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__u8 bDescriptorType; \

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__u8 bDescriptorSubtype; \

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__le16 bcdADC; \

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__le16 wTotalLength; \

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__u8 bInCollection; \

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__u8 baInterfaceNr[n]; \

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} __attribute__ ((packed))

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/* 4.3.2.1 Input Terminal Descriptor */

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struct uac_input_terminal_descriptor {

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__u8 bLength; /* in bytes: 12 */

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__u8 bDescriptorType; /* CS_INTERFACE descriptor type */

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__u8 bDescriptorSubtype; /* INPUT_TERMINAL descriptor subtype */

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__u8 bTerminalID; /* Constant uniquely terminal ID */

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__le16 wTerminalType; /* USB Audio Terminal Types */

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__u8 bAssocTerminal; /* ID of the Output Terminal associated */

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__u8 bNrChannels; /* Number of logical output channels */

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__le16 wChannelConfig;

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__u8 iChannelNames;

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__u8 iTerminal;

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} __attribute__ ((packed));

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#define UAC_DT_INPUT_TERMINAL_SIZE 12

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/* Terminals - 2.2 Input Terminal Types */

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#define UAC_INPUT_TERMINAL_UNDEFINED 0x200

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#define UAC_INPUT_TERMINAL_MICROPHONE 0x201

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#define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE 0x202

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#define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE 0x203

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#define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE 0x204

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#define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY 0x205

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#define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY 0x206

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/* Terminals - control selectors */

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#define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL 0x01

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/* 4.3.2.2 Output Terminal Descriptor */

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struct uac1_output_terminal_descriptor {

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__u8 bLength; /* in bytes: 9 */

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__u8 bDescriptorType; /* CS_INTERFACE descriptor type */

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__u8 bDescriptorSubtype; /* OUTPUT_TERMINAL descriptor subtype */

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__u8 bTerminalID; /* Constant uniquely terminal ID */

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__le16 wTerminalType; /* USB Audio Terminal Types */

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__u8 bAssocTerminal; /* ID of the Input Terminal associated */

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__u8 bSourceID; /* ID of the connected Unit or Terminal*/

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__u8 iTerminal;

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} __attribute__ ((packed));

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#define UAC_DT_OUTPUT_TERMINAL_SIZE 9

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/* Terminals - 2.3 Output Terminal Types */

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#define UAC_OUTPUT_TERMINAL_UNDEFINED 0x300

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#define UAC_OUTPUT_TERMINAL_SPEAKER 0x301

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#define UAC_OUTPUT_TERMINAL_HEADPHONES 0x302

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#define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO 0x303

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#define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER 0x304

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#define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER 0x305

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#define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306

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#define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307

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/* Terminals - 2.4 Bi-directional Terminal Types */

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#define UAC_BIDIR_TERMINAL_UNDEFINED 0x400

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#define UAC_BIDIR_TERMINAL_HANDSET 0x401

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#define UAC_BIDIR_TERMINAL_HEADSET 0x402

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#define UAC_BIDIR_TERMINAL_SPEAKER_PHONE 0x403

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#define UAC_BIDIR_TERMINAL_ECHO_SUPPRESSING 0x404

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#define UAC_BIDIR_TERMINAL_ECHO_CANCELING 0x405

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/* Set bControlSize = 2 as default setting */

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#define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2)

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/* As above, but more useful for defining your own descriptors: */

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#define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch) \

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struct uac_feature_unit_descriptor_##ch { \

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__u8 bLength; \

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__u8 bDescriptorType; \

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__u8 bDescriptorSubtype; \

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__u8 bUnitID; \

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__u8 bSourceID; \

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__u8 bControlSize; \

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__le16 bmaControls[ch + 1]; \

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__u8 iFeature; \

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} __attribute__ ((packed))

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/* 4.3.2.3 Mixer Unit Descriptor */

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struct uac_mixer_unit_descriptor {

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__u8 bLength;

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__u8 bDescriptorType;

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__u8 bDescriptorSubtype;

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__u8 bUnitID;

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__u8 bNrInPins;

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__u8 baSourceID[];

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} __attribute__ ((packed));

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static __inline__ __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)

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{

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return desc->baSourceID[desc->bNrInPins];

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}

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static __inline__ __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc,

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int protocol)

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{

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if (protocol == UAC_VERSION_1)

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return (desc->baSourceID[desc->bNrInPins + 2] << 8) |

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desc->baSourceID[desc->bNrInPins + 1];

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else

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return (desc->baSourceID[desc->bNrInPins + 4] << 24) |

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(desc->baSourceID[desc->bNrInPins + 3] << 16) |

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(desc->baSourceID[desc->bNrInPins + 2] << 8) |

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(desc->baSourceID[desc->bNrInPins + 1]);

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}

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static __inline__ __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc,

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int protocol)

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{

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return (protocol == UAC_VERSION_1) ?

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desc->baSourceID[desc->bNrInPins + 3] :

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desc->baSourceID[desc->bNrInPins + 5];

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}

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static __inline__ __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc,

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int protocol)

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{

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switch (protocol) {

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case UAC_VERSION_1:

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return &desc->baSourceID[desc->bNrInPins + 4];

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case UAC_VERSION_2:

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return &desc->baSourceID[desc->bNrInPins + 6];

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case UAC_VERSION_3:

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return &desc->baSourceID[desc->bNrInPins + 2];

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default:

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return NULL;

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}

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}

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static __inline__ __u16 uac3_mixer_unit_wClusterDescrID(struct uac_mixer_unit_descriptor *desc)

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{

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return (desc->baSourceID[desc->bNrInPins + 1] << 8) |

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desc->baSourceID[desc->bNrInPins];

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}

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static __inline__ __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc)

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{

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__u8 *raw = (__u8 *) desc;

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return raw[desc->bLength - 1];

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}

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/* 4.3.2.4 Selector Unit Descriptor */

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struct uac_selector_unit_descriptor {

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__u8 bLength;

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__u8 bDescriptorType;

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__u8 bDescriptorSubtype;

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__u8 bUintID;

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__u8 bNrInPins;

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__u8 baSourceID[];

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} __attribute__ ((packed));

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static __inline__ __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)

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{

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__u8 *raw = (__u8 *) desc;

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return raw[desc->bLength - 1];

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}

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/* 4.3.2.5 Feature Unit Descriptor */

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struct uac_feature_unit_descriptor {

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__u8 bLength;

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__u8 bDescriptorType;

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__u8 bDescriptorSubtype;

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__u8 bUnitID;

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__u8 bSourceID;

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__u8 bControlSize;

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__u8 bmaControls[0]; /* variable length */

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} __attribute__((packed));

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static __inline__ __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc)

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{

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__u8 *raw = (__u8 *) desc;

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return raw[desc->bLength - 1];

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}

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/* 4.3.2.6 Processing Unit Descriptors */

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struct uac_processing_unit_descriptor {

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__u8 bLength;

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__u8 bDescriptorType;

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__u8 bDescriptorSubtype;

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__u8 bUnitID;

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__le16 wProcessType;

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__u8 bNrInPins;

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__u8 baSourceID[];

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} __attribute__ ((packed));

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static __inline__ __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)

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{

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return desc->baSourceID[desc->bNrInPins];

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}

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static __inline__ __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc,

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int protocol)

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{

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if (protocol == UAC_VERSION_1)

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return (desc->baSourceID[desc->bNrInPins + 2] << 8) |

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desc->baSourceID[desc->bNrInPins + 1];

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else

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return (desc->baSourceID[desc->bNrInPins + 4] << 24) |

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(desc->baSourceID[desc->bNrInPins + 3] << 16) |

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(desc->baSourceID[desc->bNrInPins + 2] << 8) |

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(desc->baSourceID[desc->bNrInPins + 1]);

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}

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static __inline__ __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc,

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int protocol)

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{

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return (protocol == UAC_VERSION_1) ?

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desc->baSourceID[desc->bNrInPins + 3] :

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desc->baSourceID[desc->bNrInPins + 5];

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}

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static __inline__ __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc,

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int protocol)

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{

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switch (protocol) {

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case UAC_VERSION_1:

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return desc->baSourceID[desc->bNrInPins + 4];

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case UAC_VERSION_2:

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return 2; /* in UAC2, this value is constant */

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case UAC_VERSION_3:

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return 4; /* in UAC3, this value is constant */

[398] Fix | Delete

default:

[399] Fix | Delete

return 1;

[400] Fix | Delete

}

[401] Fix | Delete

}

[402] Fix | Delete

[403] Fix | Delete

static __inline__ __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc,

[404] Fix | Delete

int protocol)

[405] Fix | Delete

{

[406] Fix | Delete

switch (protocol) {

[407] Fix | Delete

case UAC_VERSION_1:

[408] Fix | Delete

return &desc->baSourceID[desc->bNrInPins + 5];

[409] Fix | Delete

case UAC_VERSION_2:

[410] Fix | Delete

return &desc->baSourceID[desc->bNrInPins + 6];

[411] Fix | Delete

case UAC_VERSION_3:

[412] Fix | Delete

return &desc->baSourceID[desc->bNrInPins + 2];

[413] Fix | Delete

default:

[414] Fix | Delete

return NULL;

[415] Fix | Delete

}

[416] Fix | Delete

}

[417] Fix | Delete

[418] Fix | Delete

static __inline__ __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc,

[419] Fix | Delete

int protocol)

[420] Fix | Delete

{

[421] Fix | Delete

__u8 control_size = uac_processing_unit_bControlSize(desc, protocol);

[422] Fix | Delete

[423] Fix | Delete

switch (protocol) {

[424] Fix | Delete

case UAC_VERSION_1:

[425] Fix | Delete

case UAC_VERSION_2:

[426] Fix | Delete

default:

[427] Fix | Delete

return *(uac_processing_unit_bmControls(desc, protocol)

[428] Fix | Delete

+ control_size);

[429] Fix | Delete

case UAC_VERSION_3:

[430] Fix | Delete

return 0; /* UAC3 does not have this field */

[431] Fix | Delete

}

[432] Fix | Delete

}

[433] Fix | Delete

[434] Fix | Delete

static __inline__ __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc,

[435] Fix | Delete

int protocol)

[436] Fix | Delete

{

[437] Fix | Delete

__u8 control_size = uac_processing_unit_bControlSize(desc, protocol);

[438] Fix | Delete

[439] Fix | Delete

switch (protocol) {

[440] Fix | Delete

case UAC_VERSION_1:

[441] Fix | Delete

case UAC_VERSION_2:

[442] Fix | Delete

default:

[443] Fix | Delete

return uac_processing_unit_bmControls(desc, protocol)

[444] Fix | Delete

+ control_size + 1;

[445] Fix | Delete

case UAC_VERSION_3:

[446] Fix | Delete

return uac_processing_unit_bmControls(desc, protocol)

[447] Fix | Delete

+ control_size;

[448] Fix | Delete

}

[449] Fix | Delete

}

[450] Fix | Delete

[451] Fix | Delete

[452] Fix | Delete

* Extension Unit (XU) has almost compatible layout with Processing Unit, but

[453] Fix | Delete

* on UAC2, it has a different bmControls size (bControlSize); it's 1 byte for

[454] Fix | Delete

* XU while 2 bytes for PU. The last iExtension field is a one-byte index as

[455] Fix | Delete

* well as iProcessing field of PU.

[456] Fix | Delete

[457] Fix | Delete

static __inline__ __u8 uac_extension_unit_bControlSize(struct uac_processing_unit_descriptor *desc,

[458] Fix | Delete

int protocol)

[459] Fix | Delete

{

[460] Fix | Delete

switch (protocol) {

[461] Fix | Delete

case UAC_VERSION_1:

[462] Fix | Delete

return desc->baSourceID[desc->bNrInPins + 4];

[463] Fix | Delete

case UAC_VERSION_2:

[464] Fix | Delete

return 1; /* in UAC2, this value is constant */

[465] Fix | Delete

case UAC_VERSION_3:

[466] Fix | Delete

return 4; /* in UAC3, this value is constant */

[467] Fix | Delete

default:

[468] Fix | Delete

return 1;

[469] Fix | Delete

}

[470] Fix | Delete

}

[471] Fix | Delete

[472] Fix | Delete

static __inline__ __u8 uac_extension_unit_iExtension(struct uac_processing_unit_descriptor *desc,

[473] Fix | Delete

int protocol)

[474] Fix | Delete

{

[475] Fix | Delete

__u8 control_size = uac_extension_unit_bControlSize(desc, protocol);

[476] Fix | Delete

[477] Fix | Delete

switch (protocol) {

[478] Fix | Delete

case UAC_VERSION_1:

[479] Fix | Delete

case UAC_VERSION_2:

[480] Fix | Delete

default:

[481] Fix | Delete

return *(uac_processing_unit_bmControls(desc, protocol)

[482] Fix | Delete

+ control_size);

[483] Fix | Delete

case UAC_VERSION_3:

[484] Fix | Delete

return 0; /* UAC3 does not have this field */

[485] Fix | Delete

}

[486] Fix | Delete

}

[487] Fix | Delete

[488] Fix | Delete

/* 4.5.2 Class-Specific AS Interface Descriptor */

[489] Fix | Delete

struct uac1_as_header_descriptor {

[490] Fix | Delete

__u8 bLength; /* in bytes: 7 */

[491] Fix | Delete

__u8 bDescriptorType; /* USB_DT_CS_INTERFACE */

[492] Fix | Delete

__u8 bDescriptorSubtype; /* AS_GENERAL */

[493] Fix | Delete

__u8 bTerminalLink; /* Terminal ID of connected Terminal */

[494] Fix | Delete

__u8 bDelay; /* Delay introduced by the data path */

[495] Fix | Delete

__le16 wFormatTag; /* The Audio Data Format */

[496] Fix | Delete

} __attribute__ ((packed));

[497] Fix | Delete

[498] Fix | Delete

#define UAC_DT_AS_HEADER_SIZE 7

[499] Fix | Delete