#!/bin/bash
# ftdi_rebind.sh - Automatically rebind all FTDI SIO devices that aren't bound
#		   to any kernel driver, to the ftdi_sio kernel module.
#
# Copyright (c) 2014, David Imhoff <dimhoff.devel@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of the author nor the names of its contributors may
#       be used to endorse or promote products derived from this software
#       without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

if [ ! -e '/sys/bus/usb/drivers/ftdi_sio' ]; then
	modprobe ftdi_sio || exit 1
fi

cd /sys/bus/usb/devices/

for id in *; do
	if [ ! -e ./"$id"/driver -a -e ./"$id"/modalias ]; then
		alias=`cat ./"$id"/modalias`
		if modprobe -R "$alias" | grep -q '^ftdi_sio$'; then
			echo "Rebinding device $id"
			echo -n "$id" > /sys/bus/usb/drivers/ftdi_sio/bind
		fi
	fi
done
