cregit-Linux how code gets into the kernel

Release 4.12 include/uapi/linux/usb/video.h

Directory: include/uapi/linux/usb
/*
 * USB Video Class definitions.
 *
 * Copyright (C) 2009 Laurent Pinchart <laurent.pinchart@skynet.be>
 *
 * This file holds USB constants and structures defined by the USB Device
 * Class Definition for Video Devices. Unless otherwise stated, comments
 * below reference relevant sections of the USB Video Class 1.1 specification
 * available at
 *
 * http://www.usb.org/developers/devclass_docs/USB_Video_Class_1_1.zip
 */

#ifndef __LINUX_USB_VIDEO_H

#define __LINUX_USB_VIDEO_H

#include <linux/types.h>

/* --------------------------------------------------------------------------
 * UVC constants
 */

/* A.2. Video Interface Subclass Codes */

#define UVC_SC_UNDEFINED				0x00

#define UVC_SC_VIDEOCONTROL				0x01

#define UVC_SC_VIDEOSTREAMING				0x02

#define UVC_SC_VIDEO_INTERFACE_COLLECTION		0x03

/* A.3. Video Interface Protocol Codes */

#define UVC_PC_PROTOCOL_UNDEFINED			0x00

#define UVC_PC_PROTOCOL_15				0x01

/* A.5. Video Class-Specific VC Interface Descriptor Subtypes */

#define UVC_VC_DESCRIPTOR_UNDEFINED			0x00

#define UVC_VC_HEADER					0x01

#define UVC_VC_INPUT_TERMINAL				0x02

#define UVC_VC_OUTPUT_TERMINAL				0x03

#define UVC_VC_SELECTOR_UNIT				0x04

#define UVC_VC_PROCESSING_UNIT				0x05

#define UVC_VC_EXTENSION_UNIT				0x06

/* A.6. Video Class-Specific VS Interface Descriptor Subtypes */

#define UVC_VS_UNDEFINED				0x00

#define UVC_VS_INPUT_HEADER				0x01

#define UVC_VS_OUTPUT_HEADER				0x02

#define UVC_VS_STILL_IMAGE_FRAME			0x03

#define UVC_VS_FORMAT_UNCOMPRESSED			0x04

#define UVC_VS_FRAME_UNCOMPRESSED			0x05

#define UVC_VS_FORMAT_MJPEG				0x06

#define UVC_VS_FRAME_MJPEG				0x07

#define UVC_VS_FORMAT_MPEG2TS				0x0a

#define UVC_VS_FORMAT_DV				0x0c

#define UVC_VS_COLORFORMAT				0x0d

#define UVC_VS_FORMAT_FRAME_BASED			0x10

#define UVC_VS_FRAME_FRAME_BASED			0x11

#define UVC_VS_FORMAT_STREAM_BASED			0x12

/* A.7. Video Class-Specific Endpoint Descriptor Subtypes */

#define UVC_EP_UNDEFINED				0x00

#define UVC_EP_GENERAL					0x01

#define UVC_EP_ENDPOINT					0x02

#define UVC_EP_INTERRUPT				0x03

/* A.8. Video Class-Specific Request Codes */

#define UVC_RC_UNDEFINED				0x00

#define UVC_SET_CUR					0x01

#define UVC_GET_CUR					0x81

#define UVC_GET_MIN					0x82

#define UVC_GET_MAX					0x83

#define UVC_GET_RES					0x84

#define UVC_GET_LEN					0x85

#define UVC_GET_INFO					0x86

#define UVC_GET_DEF					0x87

/* A.9.1. VideoControl Interface Control Selectors */

#define UVC_VC_CONTROL_UNDEFINED			0x00

#define UVC_VC_VIDEO_POWER_MODE_CONTROL			0x01

#define UVC_VC_REQUEST_ERROR_CODE_CONTROL		0x02

/* A.9.2. Terminal Control Selectors */

#define UVC_TE_CONTROL_UNDEFINED			0x00

/* A.9.3. Selector Unit Control Selectors */

#define UVC_SU_CONTROL_UNDEFINED			0x00

#define UVC_SU_INPUT_SELECT_CONTROL			0x01

/* A.9.4. Camera Terminal Control Selectors */

#define UVC_CT_CONTROL_UNDEFINED			0x00

#define UVC_CT_SCANNING_MODE_CONTROL			0x01

#define UVC_CT_AE_MODE_CONTROL				0x02

#define UVC_CT_AE_PRIORITY_CONTROL			0x03

#define UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL		0x04

#define UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL		0x05

#define UVC_CT_FOCUS_ABSOLUTE_CONTROL			0x06

#define UVC_CT_FOCUS_RELATIVE_CONTROL			0x07

#define UVC_CT_FOCUS_AUTO_CONTROL			0x08

#define UVC_CT_IRIS_ABSOLUTE_CONTROL			0x09

#define UVC_CT_IRIS_RELATIVE_CONTROL			0x0a

#define UVC_CT_ZOOM_ABSOLUTE_CONTROL			0x0b

#define UVC_CT_ZOOM_RELATIVE_CONTROL			0x0c

#define UVC_CT_PANTILT_ABSOLUTE_CONTROL			0x0d

#define UVC_CT_PANTILT_RELATIVE_CONTROL			0x0e

#define UVC_CT_ROLL_ABSOLUTE_CONTROL			0x0f

#define UVC_CT_ROLL_RELATIVE_CONTROL			0x10

#define UVC_CT_PRIVACY_CONTROL				0x11

/* A.9.5. Processing Unit Control Selectors */

#define UVC_PU_CONTROL_UNDEFINED			0x00

#define UVC_PU_BACKLIGHT_COMPENSATION_CONTROL		0x01

#define UVC_PU_BRIGHTNESS_CONTROL			0x02

#define UVC_PU_CONTRAST_CONTROL				0x03

#define UVC_PU_GAIN_CONTROL				0x04

#define UVC_PU_POWER_LINE_FREQUENCY_CONTROL		0x05

#define UVC_PU_HUE_CONTROL				0x06

#define UVC_PU_SATURATION_CONTROL			0x07

#define UVC_PU_SHARPNESS_CONTROL			0x08

#define UVC_PU_GAMMA_CONTROL				0x09

#define UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL	0x0a

#define UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL	0x0b

#define UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL		0x0c

#define UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL	0x0d

#define UVC_PU_DIGITAL_MULTIPLIER_CONTROL		0x0e

#define UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL		0x0f

#define UVC_PU_HUE_AUTO_CONTROL				0x10

#define UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL		0x11

#define UVC_PU_ANALOG_LOCK_STATUS_CONTROL		0x12

/* A.9.7. VideoStreaming Interface Control Selectors */

#define UVC_VS_CONTROL_UNDEFINED			0x00

#define UVC_VS_PROBE_CONTROL				0x01

#define UVC_VS_COMMIT_CONTROL				0x02

#define UVC_VS_STILL_PROBE_CONTROL			0x03

#define UVC_VS_STILL_COMMIT_CONTROL			0x04

#define UVC_VS_STILL_IMAGE_TRIGGER_CONTROL		0x05

#define UVC_VS_STREAM_ERROR_CODE_CONTROL		0x06

#define UVC_VS_GENERATE_KEY_FRAME_CONTROL		0x07

#define UVC_VS_UPDATE_FRAME_SEGMENT_CONTROL		0x08

#define UVC_VS_SYNC_DELAY_CONTROL			0x09

/* B.1. USB Terminal Types */

#define UVC_TT_VENDOR_SPECIFIC				0x0100

#define UVC_TT_STREAMING				0x0101

/* B.2. Input Terminal Types */

#define UVC_ITT_VENDOR_SPECIFIC				0x0200

#define UVC_ITT_CAMERA					0x0201

#define UVC_ITT_MEDIA_TRANSPORT_INPUT			0x0202

/* B.3. Output Terminal Types */

#define UVC_OTT_VENDOR_SPECIFIC				0x0300

#define UVC_OTT_DISPLAY					0x0301

#define UVC_OTT_MEDIA_TRANSPORT_OUTPUT			0x0302

/* B.4. External Terminal Types */

#define UVC_EXTERNAL_VENDOR_SPECIFIC			0x0400

#define UVC_COMPOSITE_CONNECTOR				0x0401

#define UVC_SVIDEO_CONNECTOR				0x0402

#define UVC_COMPONENT_CONNECTOR				0x0403

/* 2.4.2.2. Status Packet Type */

#define UVC_STATUS_TYPE_CONTROL				1

#define UVC_STATUS_TYPE_STREAMING			2

/* 2.4.3.3. Payload Header Information */

#define UVC_STREAM_EOH					(1 << 7)

#define UVC_STREAM_ERR					(1 << 6)

#define UVC_STREAM_STI					(1 << 5)

#define UVC_STREAM_RES					(1 << 4)

#define UVC_STREAM_SCR					(1 << 3)

#define UVC_STREAM_PTS					(1 << 2)

#define UVC_STREAM_EOF					(1 << 1)

#define UVC_STREAM_FID					(1 << 0)

/* 4.1.2. Control Capabilities */

#define UVC_CONTROL_CAP_GET				(1 << 0)

#define UVC_CONTROL_CAP_SET				(1 << 1)

#define UVC_CONTROL_CAP_DISABLED			(1 << 2)

#define UVC_CONTROL_CAP_AUTOUPDATE			(1 << 3)

#define UVC_CONTROL_CAP_ASYNCHRONOUS			(1 << 4)

/* ------------------------------------------------------------------------
 * UVC structures
 */

/* All UVC descriptors have these 3 fields at the beginning */

struct uvc_descriptor_header {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
} __attribute__((packed));

/* 3.7.2. Video Control Interface Header Descriptor */

struct uvc_header_descriptor {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u16 bcdUVC;
	
__u16 wTotalLength;
	
__u32 dwClockFrequency;
	
__u8  bInCollection;
	
__u8  baInterfaceNr[];
} __attribute__((__packed__));


#define UVC_DT_HEADER_SIZE(n)				(12+(n))


#define UVC_HEADER_DESCRIPTOR(n) \
	uvc_header_descriptor_##n


#define DECLARE_UVC_HEADER_DESCRIPTOR(n)		\
struct UVC_HEADER_DESCRIPTOR(n) {                       \
        __u8  bLength;                                  \
        __u8  bDescriptorType;                          \
        __u8  bDescriptorSubType;                       \
        __u16 bcdUVC;                                   \
        __u16 wTotalLength;                             \
        __u32 dwClockFrequency;                         \
        __u8  bInCollection;                            \
        __u8  baInterfaceNr[n];                         \
} __attribute__ ((packed))

/* 3.7.2.1. Input Terminal Descriptor */

struct uvc_input_terminal_descriptor {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bTerminalID;
	
__u16 wTerminalType;
	
__u8  bAssocTerminal;
	
__u8  iTerminal;
} __attribute__((__packed__));


#define UVC_DT_INPUT_TERMINAL_SIZE			8

/* 3.7.2.2. Output Terminal Descriptor */

struct uvc_output_terminal_descriptor {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bTerminalID;
	
__u16 wTerminalType;
	
__u8  bAssocTerminal;
	
__u8  bSourceID;
	
__u8  iTerminal;
} __attribute__((__packed__));


#define UVC_DT_OUTPUT_TERMINAL_SIZE			9

/* 3.7.2.3. Camera Terminal Descriptor */

struct uvc_camera_terminal_descriptor {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bTerminalID;
	
__u16 wTerminalType;
	
__u8  bAssocTerminal;
	
__u8  iTerminal;
	
__u16 wObjectiveFocalLengthMin;
	
__u16 wObjectiveFocalLengthMax;
	
__u16 wOcularFocalLength;
	
__u8  bControlSize;
	
__u8  bmControls[3];
} __attribute__((__packed__));


#define UVC_DT_CAMERA_TERMINAL_SIZE(n)			(15+(n))

/* 3.7.2.4. Selector Unit Descriptor */

struct uvc_selector_unit_descriptor {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bUnitID;
	
__u8  bNrInPins;
	
__u8  baSourceID[0];
	
__u8  iSelector;
} __attribute__((__packed__));


#define UVC_DT_SELECTOR_UNIT_SIZE(n)			(6+(n))


#define UVC_SELECTOR_UNIT_DESCRIPTOR(n)	\
	uvc_selector_unit_descriptor_##n


#define DECLARE_UVC_SELECTOR_UNIT_DESCRIPTOR(n)	\
struct UVC_SELECTOR_UNIT_DESCRIPTOR(n) {                \
        __u8  bLength;                                  \
        __u8  bDescriptorType;                          \
        __u8  bDescriptorSubType;                       \
        __u8  bUnitID;                                  \
        __u8  bNrInPins;                                \
        __u8  baSourceID[n];                            \
        __u8  iSelector;                                \
} __attribute__ ((packed))

/* 3.7.2.5. Processing Unit Descriptor */

struct uvc_processing_unit_descriptor {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bUnitID;
	
__u8  bSourceID;
	
__u16 wMaxMultiplier;
	
__u8  bControlSize;
	
__u8  bmControls[2];
	
__u8  iProcessing;
} __attribute__((__packed__));


#define UVC_DT_PROCESSING_UNIT_SIZE(n)			(9+(n))

/* 3.7.2.6. Extension Unit Descriptor */

struct uvc_extension_unit_descriptor {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bUnitID;
	
__u8  guidExtensionCode[16];
	
__u8  bNumControls;
	
__u8  bNrInPins;
	
__u8  baSourceID[0];
	
__u8  bControlSize;
	
__u8  bmControls[0];
	
__u8  iExtension;
} __attribute__((__packed__));


#define UVC_DT_EXTENSION_UNIT_SIZE(p, n)		(24+(p)+(n))


#define UVC_EXTENSION_UNIT_DESCRIPTOR(p, n) \
	uvc_extension_unit_descriptor_##p_##n


#define DECLARE_UVC_EXTENSION_UNIT_DESCRIPTOR(p, n)	\
struct UVC_EXTENSION_UNIT_DESCRIPTOR(p, n) {            \
        __u8  bLength;                                  \
        __u8  bDescriptorType;                          \
        __u8  bDescriptorSubType;                       \
        __u8  bUnitID;                                  \
        __u8  guidExtensionCode[16];                    \
        __u8  bNumControls;                             \
        __u8  bNrInPins;                                \
        __u8  baSourceID[p];                            \
        __u8  bControlSize;                             \
        __u8  bmControls[n];                            \
        __u8  iExtension;                               \
} __attribute__ ((packed))

/* 3.8.2.2. Video Control Interrupt Endpoint Descriptor */

struct uvc_control_endpoint_descriptor {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u16 wMaxTransferSize;
} __attribute__((__packed__));


#define UVC_DT_CONTROL_ENDPOINT_SIZE			5

/* 3.9.2.1. Input Header Descriptor */

struct uvc_input_header_descriptor {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bNumFormats;
	
__u16 wTotalLength;
	
__u8  bEndpointAddress;
	
__u8  bmInfo;
	
__u8  bTerminalLink;
	
__u8  bStillCaptureMethod;
	
__u8  bTriggerSupport;
	
__u8  bTriggerUsage;
	
__u8  bControlSize;
	
__u8  bmaControls[];
} __attribute__((__packed__));


#define UVC_DT_INPUT_HEADER_SIZE(n, p)			(13+(n*p))


#define UVC_INPUT_HEADER_DESCRIPTOR(n, p) \
	uvc_input_header_descriptor_##n_##p


#define DECLARE_UVC_INPUT_HEADER_DESCRIPTOR(n, p)	\
struct UVC_INPUT_HEADER_DESCRIPTOR(n, p) {              \
        __u8  bLength;                                  \
        __u8  bDescriptorType;                          \
        __u8  bDescriptorSubType;                       \
        __u8  bNumFormats;                              \
        __u16 wTotalLength;                             \
        __u8  bEndpointAddress;                         \
        __u8  bmInfo;                                   \
        __u8  bTerminalLink;                            \
        __u8  bStillCaptureMethod;                      \
        __u8  bTriggerSupport;                          \
        __u8  bTriggerUsage;                            \
        __u8  bControlSize;                             \
        __u8  bmaControls[p][n];                        \
} __attribute__ ((packed))

/* 3.9.2.2. Output Header Descriptor */

struct uvc_output_header_descriptor {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bNumFormats;
	
__u16 wTotalLength;
	
__u8  bEndpointAddress;
	
__u8  bTerminalLink;
	
__u8  bControlSize;
	
__u8  bmaControls[];
} __attribute__((__packed__));


#define UVC_DT_OUTPUT_HEADER_SIZE(n, p)			(9+(n*p))


#define UVC_OUTPUT_HEADER_DESCRIPTOR(n, p) \
	uvc_output_header_descriptor_##n_##p


#define DECLARE_UVC_OUTPUT_HEADER_DESCRIPTOR(n, p)	\
struct UVC_OUTPUT_HEADER_DESCRIPTOR(n, p) {             \
        __u8  bLength;                                  \
        __u8  bDescriptorType;                          \
        __u8  bDescriptorSubType;                       \
        __u8  bNumFormats;                              \
        __u16 wTotalLength;                             \
        __u8  bEndpointAddress;                         \
        __u8  bTerminalLink;                            \
        __u8  bControlSize;                             \
        __u8  bmaControls[p][n];                        \
} __attribute__ ((packed))

/* 3.9.2.6. Color matching descriptor */

struct uvc_color_matching_descriptor {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bColorPrimaries;
	
__u8  bTransferCharacteristics;
	
__u8  bMatrixCoefficients;
} __attribute__((__packed__));


#define UVC_DT_COLOR_MATCHING_SIZE			6

/* 4.3.1.1. Video Probe and Commit Controls */

struct uvc_streaming_control {
	
__u16 bmHint;
	
__u8  bFormatIndex;
	
__u8  bFrameIndex;
	
__u32 dwFrameInterval;
	
__u16 wKeyFrameRate;
	
__u16 wPFrameRate;
	
__u16 wCompQuality;
	
__u16 wCompWindowSize;
	
__u16 wDelay;
	
__u32 dwMaxVideoFrameSize;
	
__u32 dwMaxPayloadTransferSize;
	
__u32 dwClockFrequency;
	
__u8  bmFramingInfo;
	
__u8  bPreferedVersion;
	
__u8  bMinVersion;
	
__u8  bMaxVersion;
} __attribute__((__packed__));

/* Uncompressed Payload - 3.1.1. Uncompressed Video Format Descriptor */

struct uvc_format_uncompressed {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bFormatIndex;
	
__u8  bNumFrameDescriptors;
	
__u8  guidFormat[16];
	
__u8  bBitsPerPixel;
	
__u8  bDefaultFrameIndex;
	
__u8  bAspectRatioX;
	
__u8  bAspectRatioY;
	
__u8  bmInterfaceFlags;
	
__u8  bCopyProtect;
} __attribute__((__packed__));


#define UVC_DT_FORMAT_UNCOMPRESSED_SIZE			27

/* Uncompressed Payload - 3.1.2. Uncompressed Video Frame Descriptor */

struct uvc_frame_uncompressed {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bFrameIndex;
	
__u8  bmCapabilities;
	
__u16 wWidth;
	
__u16 wHeight;
	
__u32 dwMinBitRate;
	
__u32 dwMaxBitRate;
	
__u32 dwMaxVideoFrameBufferSize;
	
__u32 dwDefaultFrameInterval;
	
__u8  bFrameIntervalType;
	
__u32 dwFrameInterval[];
} __attribute__((__packed__));


#define UVC_DT_FRAME_UNCOMPRESSED_SIZE(n)		(26+4*(n))


#define UVC_FRAME_UNCOMPRESSED(n) \
	uvc_frame_uncompressed_##n


#define DECLARE_UVC_FRAME_UNCOMPRESSED(n)		\
struct UVC_FRAME_UNCOMPRESSED(n) {                      \
        __u8  bLength;                                  \
        __u8  bDescriptorType;                          \
        __u8  bDescriptorSubType;                       \
        __u8  bFrameIndex;                              \
        __u8  bmCapabilities;                           \
        __u16 wWidth;                                   \
        __u16 wHeight;                                  \
        __u32 dwMinBitRate;                             \
        __u32 dwMaxBitRate;                             \
        __u32 dwMaxVideoFrameBufferSize;                \
        __u32 dwDefaultFrameInterval;                   \
        __u8  bFrameIntervalType;                       \
        __u32 dwFrameInterval[n];                       \
} __attribute__ ((packed))

/* MJPEG Payload - 3.1.1. MJPEG Video Format Descriptor */

struct uvc_format_mjpeg {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bFormatIndex;
	
__u8  bNumFrameDescriptors;
	
__u8  bmFlags;
	
__u8  bDefaultFrameIndex;
	
__u8  bAspectRatioX;
	
__u8  bAspectRatioY;
	
__u8  bmInterfaceFlags;
	
__u8  bCopyProtect;
} __attribute__((__packed__));


#define UVC_DT_FORMAT_MJPEG_SIZE			11

/* MJPEG Payload - 3.1.2. MJPEG Video Frame Descriptor */

struct uvc_frame_mjpeg {
	
__u8  bLength;
	
__u8  bDescriptorType;
	
__u8  bDescriptorSubType;
	
__u8  bFrameIndex;
	
__u8  bmCapabilities;
	
__u16 wWidth;
	
__u16 wHeight;
	
__u32 dwMinBitRate;
	
__u32 dwMaxBitRate;
	
__u32 dwMaxVideoFrameBufferSize;
	
__u32 dwDefaultFrameInterval;
	
__u8  bFrameIntervalType;
	
__u32 dwFrameInterval[];
} __attribute__((__packed__));


#define UVC_DT_FRAME_MJPEG_SIZE(n)			(26+4*(n))


#define UVC_FRAME_MJPEG(n) \
	uvc_frame_mjpeg_##n


#define DECLARE_UVC_FRAME_MJPEG(n)			\
struct UVC_FRAME_MJPEG(n) {                             \
        __u8  bLength;                                  \
        __u8  bDescriptorType;                          \
        __u8  bDescriptorSubType;                       \
        __u8  bFrameIndex;                              \
        __u8  bmCapabilities;                           \
        __u16 wWidth;                                   \
        __u16 wHeight;                                  \
        __u32 dwMinBitRate;                             \
        __u32 dwMaxBitRate;                             \
        __u32 dwMaxVideoFrameBufferSize;                \
        __u32 dwDefaultFrameInterval;                   \
        __u8  bFrameIntervalType;                       \
        __u32 dwFrameInterval[n];                       \
} __attribute__ ((packed))

#endif /* __LINUX_USB_VIDEO_H */


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Directory: include/uapi/linux/usb



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