Fix for ps3 eye microphone on a raspberry pi requiring a physical unplug / reconnect on reboot to be useable as capture device

ps3_eye_mic_fix_for_raspberry_pi.sh

#!/bin/bash

# Logically eject and re-enable driver for Playstation Eye on a Pi running Raspbian Jessie.
# This is necessary because on boot, the microphone on the Eye will appear in `lsusb` and
# `arecord -l`, but will not function correctly (error "audio open error: Device or 
# resource busy" or error "read error: Input/output error").
# Can read about others having this problem here https://www.raspberrypi.org/forums/viewtopic.php?f=66&t=14903
# and here https://www.raspberrypi.org/forums/viewtopic.php?f=38&t=15851&p=160394#p160394

# point a cronjob to this file, using the special @reboot nickname to run at startup.

cd /sys/bus/usb/drivers/usb

device="1-1.4"
# 1-1.4  Refers to my ps3 eye device.
# | | |_ Device
# | |___ Port
# |_____ Bus 
# Find yours by running $ lsusb --tree

disconnect() {
  sudo sh -c "echo ${device} > unbind"
}

reconnect() {
  sudo sh -c "echo ${device} > bind"
}

sleep 10
disconnect
sleep 2
reconnect

sleep 5
disconnect
sleep 2
reconnect

logger "Virtually unplugged / plugged in the ps3 eye. Microphone should be working. Test with $ arecord -vvv /dev/null"