302 lines
9.8 KiB
C
302 lines
9.8 KiB
C
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/*
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* <linux/usb/audio.h> -- USB Audio definitions.
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*
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* Copyright (C) 2006 Thumtronics Pty Ltd.
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* Developed for Thumtronics by Grey Innovation
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* Ben Williamson <ben.williamson@greyinnovation.com>
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*
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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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*
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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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*
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* http://www.usb.org/developers/devclass_docs/audio10.pdf
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*/
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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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/* 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 UAC_PROCESSING_UNIT 0x07
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#define UAC_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.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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/* 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 uac_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 uac_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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/* 4.3.2.2 Output Terminal Descriptor */
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struct uac_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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/* 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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/* 4.5.2 Class-Specific AS Interface Descriptor */
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struct uac_as_header_descriptor {
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__u8 bLength; /* in bytes: 7 */
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__u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
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__u8 bDescriptorSubtype; /* AS_GENERAL */
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__u8 bTerminalLink; /* Terminal ID of connected Terminal */
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__u8 bDelay; /* Delay introduced by the data path */
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__le16 wFormatTag; /* The Audio Data Format */
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} __attribute__ ((packed));
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#define UAC_DT_AS_HEADER_SIZE 7
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/* Formats - A.1.1 Audio Data Format Type I Codes */
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#define UAC_FORMAT_TYPE_I_UNDEFINED 0x0
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#define UAC_FORMAT_TYPE_I_PCM 0x1
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#define UAC_FORMAT_TYPE_I_PCM8 0x2
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#define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3
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#define UAC_FORMAT_TYPE_I_ALAW 0x4
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#define UAC_FORMAT_TYPE_I_MULAW 0x5
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struct uac_format_type_i_continuous_descriptor {
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__u8 bLength; /* in bytes: 8 + (ns * 3) */
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__u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
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__u8 bDescriptorSubtype; /* FORMAT_TYPE */
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__u8 bFormatType; /* FORMAT_TYPE_1 */
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__u8 bNrChannels; /* physical channels in the stream */
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__u8 bSubframeSize; /* */
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__u8 bBitResolution;
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__u8 bSamFreqType;
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__u8 tLowerSamFreq[3];
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__u8 tUpperSamFreq[3];
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} __attribute__ ((packed));
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#define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14
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struct uac_format_type_i_discrete_descriptor {
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__u8 bLength; /* in bytes: 8 + (ns * 3) */
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__u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
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__u8 bDescriptorSubtype; /* FORMAT_TYPE */
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__u8 bFormatType; /* FORMAT_TYPE_1 */
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__u8 bNrChannels; /* physical channels in the stream */
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__u8 bSubframeSize; /* */
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__u8 bBitResolution;
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__u8 bSamFreqType;
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__u8 tSamFreq[][3];
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} __attribute__ ((packed));
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#define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \
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struct uac_format_type_i_discrete_descriptor_##n { \
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__u8 bLength; \
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__u8 bDescriptorType; \
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__u8 bDescriptorSubtype; \
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__u8 bFormatType; \
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__u8 bNrChannels; \
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__u8 bSubframeSize; \
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__u8 bBitResolution; \
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__u8 bSamFreqType; \
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__u8 tSamFreq[n][3]; \
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} __attribute__ ((packed))
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#define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
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/* Formats - A.2 Format Type Codes */
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#define UAC_FORMAT_TYPE_UNDEFINED 0x0
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#define UAC_FORMAT_TYPE_I 0x1
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#define UAC_FORMAT_TYPE_II 0x2
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#define UAC_FORMAT_TYPE_III 0x3
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struct uac_iso_endpoint_descriptor {
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__u8 bLength; /* in bytes: 7 */
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__u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */
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__u8 bDescriptorSubtype; /* EP_GENERAL */
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__u8 bmAttributes;
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__u8 bLockDelayUnits;
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__le16 wLockDelay;
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};
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#define UAC_ISO_ENDPOINT_DESC_SIZE 7
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#define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01
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#define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02
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#define UAC_EP_CS_ATTR_FILL_MAX 0x80
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/* A.10.2 Feature Unit Control Selectors */
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#define UAC_FU_CONTROL_UNDEFINED 0x00
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#define UAC_MUTE_CONTROL 0x01
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#define UAC_VOLUME_CONTROL 0x02
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#define UAC_BASS_CONTROL 0x03
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#define UAC_MID_CONTROL 0x04
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#define UAC_TREBLE_CONTROL 0x05
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#define UAC_GRAPHIC_EQUALIZER_CONTROL 0x06
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#define UAC_AUTOMATIC_GAIN_CONTROL 0x07
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#define UAC_DELAY_CONTROL 0x08
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#define UAC_BASS_BOOST_CONTROL 0x09
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#define UAC_LOUDNESS_CONTROL 0x0a
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#define UAC_FU_MUTE (1 << (UAC_MUTE_CONTROL - 1))
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#define UAC_FU_VOLUME (1 << (UAC_VOLUME_CONTROL - 1))
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#define UAC_FU_BASS (1 << (UAC_BASS_CONTROL - 1))
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#define UAC_FU_MID (1 << (UAC_MID_CONTROL - 1))
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#define UAC_FU_TREBLE (1 << (UAC_TREBLE_CONTROL - 1))
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#define UAC_FU_GRAPHIC_EQ (1 << (UAC_GRAPHIC_EQUALIZER_CONTROL - 1))
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#define UAC_FU_AUTO_GAIN (1 << (UAC_AUTOMATIC_GAIN_CONTROL - 1))
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#define UAC_FU_DELAY (1 << (UAC_DELAY_CONTROL - 1))
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#define UAC_FU_BASS_BOOST (1 << (UAC_BASS_BOOST_CONTROL - 1))
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#define UAC_FU_LOUDNESS (1 << (UAC_LOUDNESS_CONTROL - 1))
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#ifdef __KERNEL__
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struct usb_audio_control {
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struct list_head list;
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const char *name;
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u8 type;
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int data[5];
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int (*set)(struct usb_audio_control *con, u8 cmd, int value);
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int (*get)(struct usb_audio_control *con, u8 cmd);
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};
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struct usb_audio_control_selector {
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struct list_head list;
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struct list_head control;
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u8 id;
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const char *name;
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u8 type;
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struct usb_descriptor_header *desc;
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};
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#endif /* __KERNEL__ */
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#endif /* __LINUX_USB_AUDIO_H */
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