init.qcom.bt.sh

#!/system/bin/sh
# Copyright (c) 2009-2010, Code Aurora Forum. All rights reserved.
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# 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