#!/bin/sh
#
# Copyright (c) 2013-2015, The Linux Foundation. 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 Linux Foundation 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 "AS IS" AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
# 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,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

export MODULE_BASE=/lib/modules/`uname -r`
export RETRY_LIMIT=3
HELP="Usage $0 {start | stop | restart} <ap | sta,ap>"
DUMP_TO_KMSG=/dev/kmsg

do_ctrl_cld_ll () {
    case "$1" in
    start)
        echo "Starting WLAN... $@" > $DUMP_TO_KMSG
        shift
        start_ap1=0
        if [ "$1" == "ap,ap" ] || [ "$1" == "sta,ap" ]; then
            start_ap1=1
            shift
        elif [ "$1" == "ap" ]; then
            shift
        elif [ "$1" == "ap,sta" ]; then
            return 1
        fi

        set -e
        insmod $MODULE_BASE/extra/wlan.ko mmcclock=50000000 $@
        set +e

        c=1
        ifconfig wlan0 up 2>  /dev/null
        rc=$?
        while [ $rc -ne 0 -a $c -le $RETRY_LIMIT ]; do
            sleep 1
            ifconfig wlan0 up 2> /dev/null
            rc=$?
            c=`expr $c + 1`
        done

        if [ $c -gt $RETRY_LIMIT ]; then
            echo "WLAN bring-up failed!" > $DUMP_TO_KMSG
            exit 1
        fi

        if [ $start_ap1 -eq 1 ]; then
            echo "Adding second AP interface(wlan1)" > $DUMP_TO_KMSG
            iw dev wlan0 interface add wlan1 type __ap
            ifconfig wlan1 up 2> /dev/null
        fi
        ;;

    start_ftm)
        do_ctrl_cld_ll start con_mode=5
        ;;

    stop)
        echo "Stopping WLAN..." > $DUMP_TO_KMSG
        rmmod wlan
        ;;

    restart)
        do_ctrl_cld_ll stop
        shift
        do_ctrl_cld_ll start $@

        return $?
        ;;

    *)
        return 1
        ;;
    esac

    return 0
}

do_ctrl_cld_ll $@
if [ $? -ne 0 ]; then
    echo $HELP >&2
    exit 1
fi

exit 0