Release 4.7 include/uapi/linux/usb/audio.h

/*
 * <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
 *
 * Types and defines in this file are either specific to version 1.0 of
 * this standard or common for newer versions.
 */

#ifndef _UAPI__LINUX_USB_AUDIO_H

#define _UAPI__LINUX_USB_AUDIO_H

#include <linux/types.h>

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

#define UAC_VERSION_1			0x00

#define UAC_VERSION_2			0x20

/* A.2 Audio Interface Subclass Codes */

#define USB_SUBCLASS_AUDIOCONTROL	0x01

#define USB_SUBCLASS_AUDIOSTREAMING	0x02

#define USB_SUBCLASS_MIDISTREAMING	0x03

/* 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 UAC1_PROCESSING_UNIT		0x07

#define UAC1_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.7 Processing Unit Process Types */

#define UAC_PROCESS_UNDEFINED		0x00

#define UAC_PROCESS_UP_DOWNMIX		0x01

#define UAC_PROCESS_DOLBY_PROLOGIC	0x02

#define UAC_PROCESS_STEREO_EXTENDER	0x03

#define UAC_PROCESS_REVERB		0x04

#define UAC_PROCESS_CHORUS		0x05

#define UAC_PROCESS_DYN_RANGE_COMP	0x06

/* 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

/* A.10 Control Selector Codes */

/* A.10.1 Terminal Control Selectors */

#define UAC_TERM_COPY_PROTECT		0x01

/* A.10.2 Feature Unit Control Selectors */

#define UAC_FU_MUTE			0x01

#define UAC_FU_VOLUME			0x02

#define UAC_FU_BASS			0x03

#define UAC_FU_MID			0x04

#define UAC_FU_TREBLE			0x05

#define UAC_FU_GRAPHIC_EQUALIZER	0x06

#define UAC_FU_AUTOMATIC_GAIN		0x07

#define UAC_FU_DELAY			0x08

#define UAC_FU_BASS_BOOST		0x09

#define UAC_FU_LOUDNESS			0x0a


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

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

#define UAC_UD_ENABLE			0x01

#define UAC_UD_MODE_SELECT		0x02

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

#define UAC_DP_ENABLE			0x01

#define UAC_DP_MODE_SELECT		0x02

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

#define UAC_3D_ENABLE			0x01

#define UAC_3D_SPACE			0x02

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

#define UAC_REVERB_ENABLE		0x01

#define UAC_REVERB_LEVEL		0x02

#define UAC_REVERB_TIME			0x03

#define UAC_REVERB_FEEDBACK		0x04

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

#define UAC_CHORUS_ENABLE		0x01

#define UAC_CHORUS_LEVEL		0x02

#define UAC_CHORUS_RATE			0x03

#define UAC_CHORUS_DEPTH		0x04

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

#define UAC_DCR_ENABLE			0x01

#define UAC_DCR_RATE			0x02

#define UAC_DCR_MAXAMPL			0x03

#define UAC_DCR_THRESHOLD		0x04

#define UAC_DCR_ATTACK_TIME		0x05

#define UAC_DCR_RELEASE_TIME		0x06

/* A.10.4 Extension Unit Control Selectors */

#define UAC_XU_ENABLE			0x01

/* 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 uac1_ac_header_descriptor {
	
__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 uac1_ac_header_descriptor_##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

/* Terminals - control selectors */


#define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL		0x01

/* 4.3.2.2 Output Terminal Descriptor */

struct uac1_output_terminal_descriptor {
	
__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))

/* 4.3.2.3 Mixer Unit Descriptor */

struct uac_mixer_unit_descriptor {
	
__u8 bLength;
	
__u8 bDescriptorType;
	
__u8 bDescriptorSubtype;
	
__u8 bUnitID;
	
__u8 bNrInPins;
	
__u8 baSourceID[];
} __attribute__ ((packed));



static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)
{
	return desc->baSourceID[desc->bNrInPins];
}

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static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc,
						  int protocol)
{
	if (protocol == UAC_VERSION_1)
		return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
			desc->baSourceID[desc->bNrInPins + 1];
	else
		return  (desc->baSourceID[desc->bNrInPins + 4] << 24) |
			(desc->baSourceID[desc->bNrInPins + 3] << 16) |
			(desc->baSourceID[desc->bNrInPins + 2] << 8)  |
			(desc->baSourceID[desc->bNrInPins + 1]);
}

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static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc,
						int protocol)
{
	return (protocol == UAC_VERSION_1) ?
		desc->baSourceID[desc->bNrInPins + 3] :
		desc->baSourceID[desc->bNrInPins + 5];
}

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static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc,
					      int protocol)
{
	return (protocol == UAC_VERSION_1) ?
		&desc->baSourceID[desc->bNrInPins + 4] :
		&desc->baSourceID[desc->bNrInPins + 6];
}

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static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc)
{
	__u8 *raw = (__u8 *) desc;
	return raw[desc->bLength - 1];
}

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/* 4.3.2.4 Selector Unit Descriptor */

struct uac_selector_unit_descriptor {
	
__u8 bLength;
	
__u8 bDescriptorType;
	
__u8 bDescriptorSubtype;
	
__u8 bUintID;
	
__u8 bNrInPins;
	
__u8 baSourceID[];
} __attribute__ ((packed));



static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)
{
	__u8 *raw = (__u8 *) desc;
	return raw[desc->bLength - 1];
}

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/* 4.3.2.5 Feature Unit Descriptor */

struct uac_feature_unit_descriptor {
	
__u8 bLength;
	
__u8 bDescriptorType;
	
__u8 bDescriptorSubtype;
	
__u8 bUnitID;
	
__u8 bSourceID;
	
__u8 bControlSize;
	
__u8 bmaControls[0]; /* variable length */
} __attribute__((packed));



static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc)
{
	__u8 *raw = (__u8 *) desc;
	return raw[desc->bLength - 1];
}

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/* 4.3.2.6 Processing Unit Descriptors */

struct uac_processing_unit_descriptor {
	
__u8 bLength;
	
__u8 bDescriptorType;
	
__u8 bDescriptorSubtype;
	
__u8 bUnitID;
	
__u16 wProcessType;
	
__u8 bNrInPins;
	
__u8 baSourceID[];
} __attribute__ ((packed));



static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)
{
	return desc->baSourceID[desc->bNrInPins];
}

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static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc,
						       int protocol)
{
	if (protocol == UAC_VERSION_1)
		return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
			desc->baSourceID[desc->bNrInPins + 1];
	else
		return  (desc->baSourceID[desc->bNrInPins + 4] << 24) |
			(desc->baSourceID[desc->bNrInPins + 3] << 16) |
			(desc->baSourceID[desc->bNrInPins + 2] << 8)  |
			(desc->baSourceID[desc->bNrInPins + 1]);
}

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static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc,
						     int protocol)
{
	return (protocol == UAC_VERSION_1) ?
		desc->baSourceID[desc->bNrInPins + 3] :
		desc->baSourceID[desc->bNrInPins + 5];
}

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static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc,
						    int protocol)
{
	return (protocol == UAC_VERSION_1) ?
		desc->baSourceID[desc->bNrInPins + 4] :
		desc->baSourceID[desc->bNrInPins + 6];
}

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static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc,
						   int protocol)
{
	return (protocol == UAC_VERSION_1) ?
		&desc->baSourceID[desc->bNrInPins + 5] :
		&desc->baSourceID[desc->bNrInPins + 7];
}

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static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc,
						   int protocol)
{
	__u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
	return *(uac_processing_unit_bmControls(desc, protocol)
			+ control_size);
}

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static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc,
						 int protocol)
{
	__u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
	return uac_processing_unit_bmControls(desc, protocol)
			+ control_size + 1;
}

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/* 4.5.2 Class-Specific AS Interface Descriptor */

struct uac1_as_header_descriptor {
	
__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));


#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 bFormatType;
	
__u8 bSubslotSize;
	
__u8 bBitResolution;
	
__u8 bHeaderLength;
	
__u8 bControlSize;
	
__u8 bSideBandProtocol;
} __attribute__((packed));

/* Formats - Audio Data Format Type I Codes */


#define UAC_FORMAT_TYPE_II_MPEG	0x1001

#define UAC_FORMAT_TYPE_II_AC3	0x1002


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));

/* type III */

#define UAC_FORMAT_TYPE_III_IEC1937_AC3	0x2001

#define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1	0x2002

#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT	0x2003

#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT	0x2004

#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS	0x2005

#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS	0x2006

/* 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;
} __attribute__((packed));

#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

/* status word format (3.7.1.1) */


#define UAC1_STATUS_TYPE_ORIG_MASK		0x0f

#define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF	0x0

#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF	0x1

#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP	0x2


#define UAC1_STATUS_TYPE_IRQ_PENDING		(1 << 7)

#define UAC1_STATUS_TYPE_MEM_CHANGED		(1 << 6)


struct uac1_status_word {
	
__u8 bStatusType;
	
__u8 bOriginator;
} __attribute__((packed));


#endif /* _UAPI__LINUX_USB_AUDIO_H */
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Directory: include/uapi/linux/usb

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