struct libusb_ss_usb_device_capability_descriptor

Overview

A structure representing the SuperSpeed USB Device Capability descriptor This descriptor is documented in section 9.6.2.2 of the USB 3.0 specification. More…

#include <libusb.h>

struct libusb_ss_usb_device_capability_descriptor {
    // fields

    uint8_t bLength;
    uint8_t bDescriptorType;
    uint8_t bDevCapabilityType;
    uint8_t bmAttributes;
    uint16_t wSpeedSupported;
    uint8_t bFunctionalitySupport;
    uint8_t bU1DevExitLat;
    uint16_t bU2DevExitLat;
};

Detailed Documentation

A structure representing the SuperSpeed USB Device Capability descriptor This descriptor is documented in section 9.6.2.2 of the USB 3.0 specification.

All multiple-byte fields are represented in host-endian format.

Fields

uint8_t bLength

Size of this descriptor (in bytes)

uint8_t bDescriptorType

Descriptor type.

Will have value libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY LIBUSB_DT_DEVICE_CAPABILITY in this context.

uint8_t bDevCapabilityType

Capability type.

Will have value libusb_capability_type::LIBUSB_BT_SS_USB_DEVICE_CAPABILITY LIBUSB_BT_SS_USB_DEVICE_CAPABILITY in this context.

uint8_t bmAttributes

Bitmap encoding of supported device level features.

A value of one in a bit location indicates a feature is supported; a value of zero indicates it is not supported. See libusb_ss_usb_device_capability_attributes.

uint16_t wSpeedSupported

Bitmap encoding of the speed supported by this device when operating in SuperSpeed mode.

See libusb_supported_speed.

uint8_t bFunctionalitySupport

The lowest speed at which all the functionality supported by the device is available to the user.

For example if the device supports all its functionality when connected at full speed and above then it sets this value to 1.

uint8_t bU1DevExitLat

U1 Device Exit Latency.

uint16_t bU2DevExitLat

U2 Device Exit Latency.