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#!/system/bin/sh
# Copyright (c) 2009-2010, Code Aurora Forum. 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 Code Aurora 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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.
#

# Modified by C3C0 for ZTE Skate ICS purposes - 24/04/2012
# 1) disabled hci_qcom_init that is used to get the correct BT device parameters
# to be used with hciattach. Since it has problems running under CFX we just
# use parameters explicitly - we know the correct ones anyway...
#
# 2) in start_hci_attach() - use BCM sleep switch instead of default bluetooth sleep switch to make
# BT release wake lock on suspend
#

# DEFAULT BT sleep switch
BLUETOOTH_SLEEP_PATH=/proc/bluetooth/sleep/proto

# Broadcom bcm2035 sleep switch
BLUETOOTH_SLEEP_PATH2=/proc/bcm/sleep/proto

LOG_TAG="qcom-bluetooth"
LOG_NAME="${0}:"

# these are our correct parameters for hciattach
BTS_DEVICE="/dev/ttyHS0"
BTS_TYPE="bcm2035"
BTS_BAUD="115200"

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 ()
{
  # set default BT switch explicitly to 0 just to be sure
  # it does not occupy wake IRQ that bcm sleep switch needs
  echo 0 > $BLUETOOTH_SLEEP_PATH

  # set bcm sleep switch to 1 to allow bluetooth sleep mode
  echo 1 > $BLUETOOTH_SLEEP_PATH2

  # exec hciattach with our explicit params
  /system/bin/hciattach -n -s $BTS_BAUD $BTS_DEVICE $BTS_TYPE &

  # original call
  #/system/bin/hciattach -n $BTS_DEVICE $BTS_TYPE $BTS_BAUD &

  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
  echo 0 > $BLUETOOTH_SLEEP_PATH
  # 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))

# Note that "hci_qcomm_init -e" prints expressions to set the shell variables
# BTS_DEVICE, BTS_TYPE, BTS_BAUD, and BTS_ADDRESS.

#eval $(/system/bin/hci_qcomm_init -e && echo "exit_code_hci_qcomm_init=0" || echo "exit_code_hci_qcomm_init=1")

#case $exit_code_hci_qcomm_init in
# 0) logi "Bluetooth QSoC firmware download succeeded, $BTS_DEVICE $BTS_TYPE $BTS_BAUD $BTS_ADDRESS";;
# *) failed "Bluetooth QSoC firmware download failed" $exit_code_hci_qcomm_init;;
#esac



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

start_hciattach

wait $hciattach_pid

logi "Bluetooth stopped"

exit 0
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