slackware-current/source/installer/sources/initrd/etc/rc.d/rc.usb

#!/bin/sh
# rc.usb:  search for USB devices needed for installation.

# This is a function to unload the USB modules:
usb_stop() {
  modprobe -r usb-storage keybdev mousedev usbmouse hid usbkbd \
   input uhci usb-uhci usb-ohci uhci-hcd ohci-hcd ehci-hcd 2> /dev/null
  umount usbfs 2> /dev/null
  modprobe -r usbcore 2> /dev/null
}

# This is a function to attempt to enable a USB keyboard,
# mouse, and storage (CD or hard drive).
# If this causes problems for you, use "nousb" as a kernel
# command line option at boot time.
usb_start() {
  # If nousb was given at boot, skip.
  if ! cat /proc/cmdline | grep nousb 1> /dev/null 2> /dev/null ; then
    # If there aren't even any modules for this kernel, skip.
    if [ -d /lib/modules/`uname -r` ]; then
      # If usbcore is already loaded, skip.
      if ! grep usbcore /proc/modules 1> /dev/null 2> /dev/null ; then
        echo "Probing for USB controllers."
        echo "(to skip, give a 'nousb' kernel option at boot)"
        #sleep 5
        modprobe -q usbcore >/dev/null 2>&1
        # Try to mount usbfs:
        if [ -d /proc/bus/usb -a ! -f /proc/bus/usb/devices ]; then
          mount -t usbfs usbfs /proc/bus/usb
        fi
        # Try to load all the hub modules:
        modprobe -q ehci-hcd >/dev/null 2>&1
        modprobe -q ohci-hcd >/dev/null 2>&1
        modprobe -q uhci-hcd >/dev/null 2>&1
        modprobe -q usb-ohci >/dev/null 2>&1
        # NOTE: this prefers "uhci"; you may prefer "usb-uhci".
        #modprobe -q usb-uhci >/dev/null 2>&1 || modprobe -q uhci >/dev/null 2>&1
        modprobe -q uhci >/dev/null 2>&1 || modprobe -q usb-uhci >/dev/null 2>&1
        # Load input core:
        modprobe -q input >/dev/null 2>&1
        # Load USB keyboard:
        modprobe -q usbkbd >/dev/null 2>&1
        # Load Human Interface Device (HID) USB module:
        modprobe -q hid >/dev/null 2>&1
        # Load mouse (just in case (TM)) and keyboard USB input modules:
        modprobe -q mousedev >/dev/null 2>&1
        modprobe -q keybdev >/dev/null 2>&1
        # Attempt to load storage support.  Some funny USB ports (non-0 LUN) might not work
        # so well, but most are well-behaved.
        modprobe -q usb-storage >/dev/null 2>&1
      fi
    fi
  fi
}

case "$1" in
'start')
  usb_start
  ;;
'stop')
  usb_stop
  ;;
'restart')
  usb_stop
  sleep 5
  usb_start
  ;;
*)
  echo "usage $0 start|stop|restart"
esac