reset_usb_controller.sh

#!/bin/bash

# Script to reset all local xHCI (USB) controllers
# Based on: http://billauer.co.il/blog/2013/02/usb-reset-ehci-uhci-linux/

if [[ ${EUID} != 0 ]]; then
	echo This must be run as root!
	exit 1
fi

for xhci in /sys/bus/pci/drivers/?hci_hcd; do
	if ! cd ${xhci}; then
		echo "Weird error. Failed to change directory to ${xhci}."
	exit 1
	fi
	echo "Resetting devices from ${xhci}..."
	for i in ????:??:??.?; do
		echo -n "${i}" > unbind
		echo -n "${i}" > bind
	done
done