# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

description   "Run the CH7036 HDMI monitor"
author        "chromium-os-dev@chromium.org"

start on starting boot-services
stop on stopping boot-services

# sadly, these can't reference each other.
env DATA_DIR=/home/chronos
env LOGBASE=/var/log/ch7036_monitor
env RUNDIR=/var/run/chrontel
env RUNFILES="forced_mute"
env XAUTHORITY=/home/chronos/.Xauthority
env DISPLAY=:0.0
# keep these consistent, make second empty for pure ch7036 detection
# this is hardware specific for tigerpoint gpio15
# TODO(mdhayter) use board type or ebuild magic to select
env HPDGPIO=207
env GPIOFLAG=-g/sys/class/gpio/gpio207/value
env I2C=/dev/i2c-chrontel
# might be overridden by --uid parameter in /sbin/session_manager_setup.sh
env USER_ID=1000

respawn

script

# Define some max.  Don't need that many for debugging.
local max_logs=5

# All logs are tagged with the date.
local log_tag=`date +%Y%m%d-%H%M%S`
local log_count=`ls -t "$LOGBASE"* | wc -l`

# Don't allow logs to grow past max log count.
if [ $log_count -ge $max_logs ] ; then
  local oldest_log=`ls -rt "$LOGBASE"* | head -1`
  rm "$oldest_log"
fi
exec /usr/bin/ch7036_monitor -v -d $I2C $GPIOFLAG >> "$LOGBASE.$log_tag" 2>&1

end script

# Scripts terminate on command fail
# Should not actually start if anything in here fails
# Note you get an error if you try to re-export a gpio
pre-start script
  echo "No HDMI support" > /var/log/hdmi_edid.log 
  if [ ! -d $RUNDIR ] ; then
     mkdir $RUNDIR
  else
     for name in $RUNFILES ; do
       if [ -e $RUNDIR/$name ] ; then
         rm $RUNDIR/$name
       fi
     done
  fi
  test -d $RUNDIR
  test -e /usr/bin/ch7036_monitor
  /sbin/modprobe i2c-dev
  /sbin/modprobe i2c-i801
  /sbin/modprobe nm10_gpio
  if [ ! -e /sys/class/gpio/gpio$HPDGPIO ] ; then
    echo $HPDGPIO > /sys/class/gpio/export
  fi
  dv="i2c-unknown"
  # Find the I2C bus that may contain the CH7036
  # on Tigerpoint look for an adapter with a name of the form
  # SMBus I801 adapter at XXXX
  # Note: requires the explicit modprobe of i2c-i801 above to in /sys in time
  for x in /sys/class/i2c-adapter/*/name
  do
    y=`cat $x`
    if [ "${y% I801 adapter*}" = "SMBus" ] ; then dv=$x; fi
  done
  dv=/dev/${dv##/*er/}
  # Don't see a way to export this info to the main script
  # So create a symlink to the device that can be used
  ln -sf ${dv%/name} $I2C
  echo Made symlink ${dv%/name} $I2C >> /tmp/chprobe
  /usr/bin/ch7036_monitor -p -d $I2C -v >> /tmp/chprobe 2>&1
end script

post-stop script
  if [ -d $RUNDIR ] ; then
     for name in $RUNFILES ; do
       if [ -e $RUNDIR/$name ] ; then
         rm $RUNDIR/$name
       fi
     done
  fi
end script