#!/bin/bash
#
# Copyright (c) 2018 Baozhu Zuo <zuobaozhu@gmail.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

set -x
exec 1>/var/log/$(basename $0).log 2>&1

OVERLAYS=/boot/overlays
#enable i2c interface
dtparam -d $OVERLAYS i2c_arm=on
modprobe i2c-dev

#enable spi interface
dtparam -d $OVERLAYS spi=on

is_1a=$(i2cdetect -y  1 0x1a 0x1a | egrep "(1a|UU)" | awk '{print $2}')
is_35=$(i2cdetect -y  1 0x35 0x35 | egrep "(35|UU)" | awk '{print $2}')
is_3b=$(i2cdetect -y  1 0x3b 0x3b | egrep "(3b|UU)" | awk '{print $2}')

# Set default configurations
RPI_HATS="seeed-2mic-voicecard seeed-4mic-voicecard seeed-8mic-voicecard"
overlay=""
asound_state=/var/lib/alsa/default-asound.state
pulse_default=/etc/pulse/pulseaudio-system.pa
pulse_daemon=/etc/pulse/pulseaudio-daemon.conf

# Remove old configurations
rm /var/lib/alsa/asound.state
rm /etc/voicecard/asound.state
rm /etc/pulse/system.pa
rm /etc/pulse/daemon.conf

if [ "x${is_1a}" != "x" ] && [ "x${is_35}" == "x" ] ; then
    echo "install wm8960"
    modprobe snd-soc-wm8960
    overlay=wm8960-soundcard
    asound_state=/etc/voicecard/wm8960_asound.state
fi

if [ "x${is_3b}" != "x" ] && [ "x${is_35}" == "x" ] ; then
    echo "install 4mic"
    modprobe snd-soc-seeed-voicecard
    modprobe snd-soc-ac108
    overlay=seeed-4mic-voicecard
    asound_state=/etc/voicecard/ac108_asound.state
    pulse_default=/etc/pulse/seeed-voicecard-4mic-default.pa
    pulse_daemon=/etc/pulse/seeed-voicecard-4mic-daemon.conf
fi

if [ "x${is_3b}" != "x" ] && [ "x${is_35}" != "x" ] ; then
    echo "install 6mic"
    modprobe snd-soc-seeed-voicecard
    modprobe snd-soc-ac108
    overlay=seeed-8mic-voicecard
    asound_state=/etc/voicecard/ac108_6mic.state
    pulse_default=/etc/pulse/seeed-voicecard-8mic-default.pa
    pulse_daemon=/etc/pulse/seeed-voicecard-8mic-daemon.conf
fi

if [ "$overlay" ]; then
    echo Loading $overlay ...

    # Make sure the driver loads correctly
    dtoverlay -d $OVERLAYS $overlay || true

    # Install soundstate
    echo "create $overlay asound status file"
    ln -s $asound_state /etc/voicecard/asound.state

    # Install pulseaudio files
    echo "create $overlay pulse system file"
    ln -s $pulse_default /etc/pulse/system.pa
    echo "create $overlay pulse daemon file"
    ln -s $pulse_daemon /etc/pulse/daemon.conf
fi

alsactl -E HOME=/run/alsa -f /etc/voicecard/asound.state restore