#!/bin/sh
# (c) MandrakeSoft, Chmouel Boudjnah <chmouel@mandrakesoft.com>
# 	$Id: usb,v 1.46 2002/11/18 22:05:31 flepied Exp $	
#
# usb	        This shell script takes care of starting and stopping
#               your usb devices.
#
# description: This startup script try to load your modules for your usb devices.

if [ -f /etc/modules.conf ];then
    conf_file=/etc/modules.conf
elif [ -f /etc/conf.modules ];then
    conf_file=/etc/conf.modules
else
    exit 0
fi

if [ -f /etc/sysconfig/usb ];then
    source /etc/sysconfig/usb
fi

grep -iq nousb /proc/cmdline && exit 0

. /etc/rc.d/init.d/functions

if [ "$USB" = "no" ];then
    exit 0
fi

ARCH=$(uname -m)

function load_module () {
    opt=""
    phrase=$1
    alias=$2
    [ -n "$3" ] && opt="-r"
    modules=`egrep -s "^(probeall|alias)( |\t)+"$alias"( |\t)+" $conf_file | sed "s/^.*$alias//"`
    for module in $modules; do
        if [ -n "$module" ] && [ "$module" != "off" ];then
                action "Initializing USB controller (%s): " $module modprobe "$opt" $module
        fi
    done
    return 0;
}

function get_usb_interface () {
    if  ! egrep -q "^(probeall|alias) usb-interface" $conf_file;then
	exit 0
    fi
}

function mount_proc_usb () {
    if grep -q usbdevfs  /proc/filesystems;then
	if ! grep -q /proc/bus/usb /proc/mounts;then
	    action "Mount USB filesystem" mount -t usbdevfs -o devmode=0664,devgid=43 none /proc/bus/usb
	fi
    fi
}

function remove_module () {
    modules="$@"
    for module in "$modules";do
	modprobe -r $module >/dev/null 2>&1
    done
}

function usb_stop () {

    # call this multiple times if you had to take down components of the
    # USB subsystem by hand; it cleans up whatever can
    # be cleaned up, letting the system quiesce further.

    # disconnect all controllers we can, and kernel drivers
    # HCDs first, so most drivers reduce their use counts.
    remove_module usb-ohci usb-uhci uhci
    remove_module ehci-hcd hcd

    # user mode code may keep usbdevfs busy for a while yet ...

    # OK, usbcore won't actually be removed unless there happen to be
    # no USB drivers loaded, and usbdevfs isn't mounted.  let's force
    # removal of autocleanable modules before trying to rmmod usbcore
    rmmod -as

    # Now let's workaround the fact that some USB modules never increase
    # their module use counts, so that "rmmod -a" won't unload them.
    # (And we can't use "modprobe --autoclean" anyway.)

    remove_module joydev keybdev wacom wmforce 
    remove_module cpia_usb cpia dc2xx rio500 mdc800 scanner 
    remove_module acm audio ibmcam uss720 printer hid 
    remove_module microtek dsbr100 evdev pegasus plusb 
    remove_module usb-serial usb-storage net1080 usbnet kaweth 
    remove_module ov511 videodev belkin_sa digi_acceleport empeg ftdi_sio 
    remove_module keyspan_pda keyspan omninet visor whiteheat usbserial 
    remove_module bluetooth dabusb mct_u232
    modprobe -r usbkbd >/dev/null 2>&1
    modprobe -r input >/dev/null 2>&1
    modprobe -r usbvision >/dev/null 2>&1

    # ok, hope that user mode drivers/managers closed their fds.
    umount /proc/bus/usb >/dev/null 2>&1

    remove_module usbcore

    # we did everything we could ...
    return 0;
}    

PKLVL=$(cut -f1 /proc/sys/kernel/printk)

case $1 in 
    start)
	
 	get_usb_interface;
	sysctl -n -w kernel.printk=0

	load_module "Loading USB interface" usb-interface || retval=1	
	awk '/^((alias)|(probe)) +usb-interface[0-9]/ {print $2, " ", $3}' $conf_file | ( \
	    while read line mod; do
		nmb=${line##usb-interface}
		[[ $loaded != *$mod* ]] && { 
		    load_module "Loading USB interface$nmb" $line || retval=1
		}
		loaded="$loaded $mod"
	    done
	)
	mount_proc_usb
	
	# Static modules that we want to insert and not detected by usbd.
	if [ "$MOUSE" = "yes" ];then
	    action "Loading USB mouse" /sbin/modprobe mousedev
	fi
	if [ "$KEYBOARD" = "yes" ];then
	    action "Loading USB keyboard" /sbin/modprobe keybdev
	fi
	if [ "$STORAGE" = "yes" ];then
	    action "Loading USB storage"  /sbin/modprobe usb-storage
	fi
	if [ "$PRINTER" = "yes" ];then
	    action "Loading USB printer"  /sbin/modprobe printer
	fi
	if [ "$VISOR" = "yes" ];then
	    action "Loading USB visor"  /sbin/modprobe visor
	fi
	
	sysctl -n -w kernel.printk=$PKLVL
	
	;;
    stop)
#	usb_stop;
	rm -f /var/lock/subsys/usb
	;;

    status)

	if fgrep -q usbcore /proc/modules;then
	    gprintf "USB Loaded."
	    echo
	else
	    gprintf "USB not loaded."
	    echo
	fi
	exit 0
	;;

    reload)
	;;
    restart)
	$0 stop
	$0 start
	;;
    *)
	gprintf "Usage: %s\n" "$(basename $0) {start|stop|restart|status}"
	exit 0
	;;
esac

exit 0