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USB defines class code information that is used to identify a device's functionality and to nominally load a device driver based on that functionality.

This field identifies the release of the USB Specification with which the device and its descriptors are compliant. 4, bDeviceClass, uint8_t, 1, Class. Class ...

2021/12/14 -The device class field of the device descriptor (bDeviceClass) must contain a value of zero, or the class (bDeviceClass), subclass ...

USB-IF protocol code for the device, qualified by the bDeviceClass and bDeviceSubClass values. uint8_t, bMaxPacketSize0. Maximum packet size for endpoint 0.

FTDI have defined our own device class, so FTDI devices return a 0 for the bDeviceClass (Vendor class). The class cannot be configured by the designer. Our ...

Subclass code (assigned by the USB-IF). These codes are qualified by the value of the bDeviceClass field. ... These codes are qualified by the values of the ...

2018/5/2 -Lookup bDeviceClass against https://usb-ids.gowdy.us/read/UC/ - device classes. There 0xEF is Miscellaneous Device.

2012/9/14 -bDeviceClass. Device class code. The USB working group assigns device class codes. If this member is zero (0), each of the USB device's ...

bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0. So it appears to be doing what the spec says, however its not using the ...

2021/1/26 -I'm unable to successfully set the bDeviceClass, bDeviceProtocol, or bDeviceSubClass when configuring a device as an RNDIS gadget in /sys/kernel ...