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/*
* <linux/usb/audio.h> -- USB Audio definitions.
*
* Copyright (C) 2006 Thumtronics Pty Ltd.
* Developed for Thumtronics by Grey Innovation
* Ben Williamson <ben.williamson@greyinnovation.com>
*
* This software is distributed under the terms of the GNU General Public
* License ("GPL") version 2, as published by the Free Software Foundation.
*
* This file holds USB constants and structures defined
* by the USB Device Class Definition for Audio Devices.
* Comments below reference relevant sections of that document:
*
* http://www.usb.org/developers/devclass_docs/audio10.pdf
*/
#ifndef __LINUX_USB_AUDIO_H
#define __LINUX_USB_AUDIO_H
#include <linux/types.h>
/* A.2 Audio Interface Subclass Codes */
#define USB_SUBCLASS_AUDIOCONTROL 0x01
#define USB_SUBCLASS_AUDIOSTREAMING 0x02
#define USB_SUBCLASS_MIDISTREAMING 0x03
#define UAC_VERSION_1 0x00
#define UAC_VERSION_2 0x20
/* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */
#define UAC_HEADER 0x01
#define UAC_INPUT_TERMINAL 0x02
#define UAC_OUTPUT_TERMINAL 0x03
#define UAC_MIXER_UNIT 0x04
#define UAC_SELECTOR_UNIT 0x05
#define UAC_FEATURE_UNIT 0x06
#define UAC_PROCESSING_UNIT 0x07
#define UAC_EXTENSION_UNIT 0x08
/* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */
#define UAC_AS_GENERAL 0x01
#define UAC_FORMAT_TYPE 0x02
#define UAC_FORMAT_SPECIFIC 0x03
/* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */
#define UAC_EP_GENERAL 0x01
/* A.9 Audio Class-Specific Request Codes */
#define UAC_SET_ 0x00
#define UAC_GET_ 0x80
#define UAC__CUR 0x1
#define UAC__MIN 0x2
#define UAC__MAX 0x3
#define UAC__RES 0x4
#define UAC__MEM 0x5
#define UAC_SET_CUR (UAC_SET_ | UAC__CUR)
#define UAC_GET_CUR (UAC_GET_ | UAC__CUR)
#define UAC_SET_MIN (UAC_SET_ | UAC__MIN)
#define UAC_GET_MIN (UAC_GET_ | UAC__MIN)
#define UAC_SET_MAX (UAC_SET_ | UAC__MAX)
#define UAC_GET_MAX (UAC_GET_ | UAC__MAX)
#define UAC_SET_RES (UAC_SET_ | UAC__RES)
#define UAC_GET_RES (UAC_GET_ | UAC__RES)
#define UAC_SET_MEM (UAC_SET_ | UAC__MEM)
#define UAC_GET_MEM (UAC_GET_ | UAC__MEM)
#define UAC_GET_STAT 0xff
/* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */
#define UAC_MS_HEADER 0x01
#define UAC_MIDI_IN_JACK 0x02
#define UAC_MIDI_OUT_JACK 0x03
/* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */
#define UAC_MS_GENERAL 0x01
/* Terminals - 2.1 USB Terminal Types */
#define UAC_TERMINAL_UNDEFINED 0x100
#define UAC_TERMINAL_STREAMING 0x101
#define UAC_TERMINAL_VENDOR_SPEC 0x1FF
/* Terminal Control Selectors */
/* 4.3.2 Class-Specific AC Interface Descriptor */
struct uac_ac_header_descriptor_v1 {
__u8 bLength; /* 8 + n */
__u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
__u8 bDescriptorSubtype; /* UAC_MS_HEADER */
__le16 bcdADC; /* 0x0100 */
__le16 wTotalLength; /* includes Unit and Terminal desc. */
__u8 bInCollection; /* n */
__u8 baInterfaceNr[]; /* [n] */
} __attribute__ ((packed));
#define UAC_DT_AC_HEADER_SIZE(n) (8 + (n))
/* As above, but more useful for defining your own descriptors: */
#define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n) \
struct uac_ac_header_descriptor_v1_##n { \
__u8 bLength; \
__u8 bDescriptorType; \
__u8 bDescriptorSubtype; \
__le16 bcdADC; \
__le16 wTotalLength; \
__u8 bInCollection; \
__u8 baInterfaceNr[n]; \
} __attribute__ ((packed))
/* 4.3.2.1 Input Terminal Descriptor */
struct uac_input_terminal_descriptor {
__u8 bLength; /* in bytes: 12 */
__u8 bDescriptorType; /* CS_INTERFACE descriptor type */
__u8 bDescriptorSubtype; /* INPUT_TERMINAL descriptor subtype */
__u8 bTerminalID; /* Constant uniquely terminal ID */
__le16 wTerminalType; /* USB Audio Terminal Types */
__u8 bAssocTerminal; /* ID of the Output Terminal associated */
__u8 bNrChannels; /* Number of logical output channels */
__le16 wChannelConfig;
__u8 iChannelNames;
__u8 iTerminal;
} __attribute__ ((packed));
#define UAC_DT_INPUT_TERMINAL_SIZE 12
/* Terminals - 2.2 Input Terminal Types */
#define UAC_INPUT_TERMINAL_UNDEFINED 0x200
#define UAC_INPUT_TERMINAL_MICROPHONE 0x201
#define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE 0x202
#define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE 0x203
#define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE 0x204
#define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY 0x205
#define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY 0x206
/* 4.3.2.2 Output Terminal Descriptor */
struct uac_output_terminal_descriptor_v1 {
__u8 bLength; /* in bytes: 9 */
__u8 bDescriptorType; /* CS_INTERFACE descriptor type */
__u8 bDescriptorSubtype; /* OUTPUT_TERMINAL descriptor subtype */
__u8 bTerminalID; /* Constant uniquely terminal ID */
__le16 wTerminalType; /* USB Audio Terminal Types */
__u8 bAssocTerminal; /* ID of the Input Terminal associated */
__u8 bSourceID; /* ID of the connected Unit or Terminal*/
__u8 iTerminal;
} __attribute__ ((packed));
#define UAC_DT_OUTPUT_TERMINAL_SIZE 9
/* Terminals - 2.3 Output Terminal Types */
#define UAC_OUTPUT_TERMINAL_UNDEFINED 0x300
#define UAC_OUTPUT_TERMINAL_SPEAKER 0x301
#define UAC_OUTPUT_TERMINAL_HEADPHONES 0x302
#define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO 0x303
#define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER 0x304
#define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER 0x305
#define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306
#define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307
/* Set bControlSize = 2 as default setting */
#define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2)
/* As above, but more useful for defining your own descriptors: */
#define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch) \
struct uac_feature_unit_descriptor_##ch { \
__u8 bLength; \
__u8 bDescriptorType; \
__u8 bDescriptorSubtype; \
__u8 bUnitID; \
__u8 bSourceID; \
__u8 bControlSize; \
__le16 bmaControls[ch + 1]; \
__u8 iFeature; \
} __attribute__ ((packed))
/* 4.5.2 Class-Specific AS Interface Descriptor */
struct uac_as_header_descriptor_v1 {
__u8 bLength; /* in bytes: 7 */
__u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
__u8 bDescriptorSubtype; /* AS_GENERAL */
__u8 bTerminalLink; /* Terminal ID of connected Terminal */
__u8 bDelay; /* Delay introduced by the data path */
__le16 wFormatTag; /* The Audio Data Format */
} __attribute__ ((packed));
struct uac_as_header_descriptor_v2 {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bTerminalLink;
__u8 bmControls;
__u8 bFormatType;
__u32 bmFormats;
__u8 bNrChannels;
__u32 bmChannelConfig;
__u8 iChannelNames;
} __attribute__((packed));
#define UAC_DT_AS_HEADER_SIZE 7
/* Formats - A.1.1 Audio Data Format Type I Codes */
#define UAC_FORMAT_TYPE_I_UNDEFINED 0x0
#define UAC_FORMAT_TYPE_I_PCM 0x1
#define UAC_FORMAT_TYPE_I_PCM8 0x2
#define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3
#define UAC_FORMAT_TYPE_I_ALAW 0x4
#define UAC_FORMAT_TYPE_I_MULAW 0x5
struct uac_format_type_i_continuous_descriptor {
__u8 bLength; /* in bytes: 8 + (ns * 3) */
__u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
__u8 bDescriptorSubtype; /* FORMAT_TYPE */
__u8 bFormatType; /* FORMAT_TYPE_1 */
__u8 bNrChannels; /* physical channels in the stream */
__u8 bSubframeSize; /* */
__u8 bBitResolution;
__u8 bSamFreqType;
__u8 tLowerSamFreq[3];
__u8 tUpperSamFreq[3];
} __attribute__ ((packed));
#define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14
struct uac_format_type_i_discrete_descriptor {
__u8 bLength; /* in bytes: 8 + (ns * 3) */
__u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
__u8 bDescriptorSubtype; /* FORMAT_TYPE */
__u8 bFormatType; /* FORMAT_TYPE_1 */
__u8 bNrChannels; /* physical channels in the stream */
__u8 bSubframeSize; /* */
__u8 bBitResolution;
__u8 bSamFreqType;
__u8 tSamFreq[][3];
} __attribute__ ((packed));
#define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \
struct uac_format_type_i_discrete_descriptor_##n { \
__u8 bLength; \
__u8 bDescriptorType; \
__u8 bDescriptorSubtype; \
__u8 bFormatType; \
__u8 bNrChannels; \
__u8 bSubframeSize; \
__u8 bBitResolution; \
__u8 bSamFreqType; \
__u8 tSamFreq[n][3]; \
} __attribute__ ((packed))
#define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
struct uac_format_type_i_ext_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bSubslotSize;
__u8 bFormatType;
__u8 bBitResolution;
__u8 bHeaderLength;
__u8 bControlSize;
__u8 bSideBandProtocol;
} __attribute__((packed));
/* Formats - Audio Data Format Type I Codes */
struct uac_format_type_ii_discrete_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bFormatType;
__le16 wMaxBitRate;
__le16 wSamplesPerFrame;
__u8 bSamFreqType;
__u8 tSamFreq[][3];
} __attribute__((packed));
struct uac_format_type_ii_ext_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bFormatType;
__u16 wMaxBitRate;
__u16 wSamplesPerFrame;
__u8 bHeaderLength;
__u8 bSideBandProtocol;
} __attribute__((packed));
/* Formats - A.2 Format Type Codes */
#define UAC_FORMAT_TYPE_UNDEFINED 0x0
#define UAC_FORMAT_TYPE_I 0x1
#define UAC_FORMAT_TYPE_II 0x2
#define UAC_FORMAT_TYPE_III 0x3
#define UAC_EXT_FORMAT_TYPE_I 0x81
#define UAC_EXT_FORMAT_TYPE_II 0x82
#define UAC_EXT_FORMAT_TYPE_III 0x83
struct uac_iso_endpoint_descriptor {
__u8 bLength; /* in bytes: 7 */
__u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */
__u8 bDescriptorSubtype; /* EP_GENERAL */
__u8 bmAttributes;
__u8 bLockDelayUnits;
__le16 wLockDelay;
};
#define UAC_ISO_ENDPOINT_DESC_SIZE 7
#define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01
#define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02
#define UAC_EP_CS_ATTR_FILL_MAX 0x80
/* Audio class v2.0: CLOCK_SOURCE descriptor */
struct uac_clock_source_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bClockID;
__u8 bmAttributes;
__u8 bmControls;
__u8 bAssocTerminal;
__u8 iClockSource;
} __attribute__((packed));
/* A.10.2 Feature Unit Control Selectors */
struct uac_feature_unit_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bUnitID;
__u8 bSourceID;
__u8 bControlSize;
__u8 controls[0]; /* variable length */
} __attribute__((packed));
#define UAC_FU_CONTROL_UNDEFINED 0x00
#define UAC_MUTE_CONTROL 0x01
#define UAC_VOLUME_CONTROL 0x02
#define UAC_BASS_CONTROL 0x03
#define UAC_MID_CONTROL 0x04
#define UAC_TREBLE_CONTROL 0x05
#define UAC_GRAPHIC_EQUALIZER_CONTROL 0x06
#define UAC_AUTOMATIC_GAIN_CONTROL 0x07
#define UAC_DELAY_CONTROL 0x08
#define UAC_BASS_BOOST_CONTROL 0x09
#define UAC_LOUDNESS_CONTROL 0x0a
#define UAC_FU_MUTE (1 << (UAC_MUTE_CONTROL - 1))
#define UAC_FU_VOLUME (1 << (UAC_VOLUME_CONTROL - 1))
#define UAC_FU_BASS (1 << (UAC_BASS_CONTROL - 1))
#define UAC_FU_MID (1 << (UAC_MID_CONTROL - 1))
#define UAC_FU_TREBLE (1 << (UAC_TREBLE_CONTROL - 1))
#define UAC_FU_GRAPHIC_EQ (1 << (UAC_GRAPHIC_EQUALIZER_CONTROL - 1))
#define UAC_FU_AUTO_GAIN (1 << (UAC_AUTOMATIC_GAIN_CONTROL - 1))
#define UAC_FU_DELAY (1 << (UAC_DELAY_CONTROL - 1))
#define UAC_FU_BASS_BOOST (1 << (UAC_BASS_BOOST_CONTROL - 1))
#define UAC_FU_LOUDNESS (1 << (UAC_LOUDNESS_CONTROL - 1))
#ifdef __KERNEL__
struct usb_audio_control {
struct list_head list;
const char *name;
u8 type;
int data[5];
int (*set)(struct usb_audio_control *con, u8 cmd, int value);
int (*get)(struct usb_audio_control *con, u8 cmd);
};
struct usb_audio_control_selector {
struct list_head list;
struct list_head control;
u8 id;
const char *name;
u8 type;
struct usb_descriptor_header *desc;
};
#endif /* __KERNEL__ */
#endif /* __LINUX_USB_AUDIO_H */
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