#!/system/bin/sh
# Copyright (c) 2012, 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.
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#       documentation and/or other materials provided with the distribution.
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#       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 COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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LOG_TAG="qcom-bluetooth"
LOG_NAME="${0}:"

hciattach_pid=""

loge ()
{
  /system/bin/log -t $LOG_TAG -p e "$LOG_NAME $@"
}

logi ()
{
  /system/bin/log -t $LOG_TAG -p i "$LOG_NAME $@"
}

failed ()
{
  loge "$1: exit code $2"
  exit $2
}

start_hciattach ()
{
  /system/bin/hciattach -n /dev/ttyHS2 ath3k 3000000 &
  hciattach_pid=$!
  logi "start_hciattach: pid = $hciattach_pid"
}

kill_hciattach ()
{
  logi "kill_hciattach: pid = $hciattach_pid"
  ## careful not to kill zero or null!
  kill -TERM $hciattach_pid
  # this shell doesn't exit now -- wait returns for normal exit
}

# mimic hciattach options parsing -- maybe a waste of effort
USAGE="hciattach [-n] [-p] [-b] [-t timeout] [-s initial_speed] <tty> <type | id> [speed] [flow|noflow] [bdaddr]"

while getopts "blnpt:s:" f
do
  case $f in
  b | l | n | p)  opt_flags="$opt_flags -$f" ;;
  t)      timeout=$OPTARG;;
  s)      initial_speed=$OPTARG;;
  \?)     echo $USAGE; exit 1;;
  esac
done
shift $(($OPTIND-1))

# init does SIGTERM on ctl.stop for service
trap "kill_hciattach" TERM INT

logi "start hciattach"
start_hciattach

wait $hciattach_pid
logi "Bluetooth stopped"

exit 0