1 What: For USB devices : /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/report_descriptor
2 For BT devices : /sys/class/bluetooth/hci<addr>/<hid-bus>:<vendor-id>:<product-id>.<num>/report_descriptor
3 Symlink : /sys/class/hidraw/hidraw<num>/device/report_descriptor
6 Contact: Alan Ott <alan@signal11.us>
7 Description: When read, this file returns the device's raw binary HID
9 This file cannot be written.
10 Users: HIDAPI library (http://www.signal11.us/oss/hidapi)