Unified script for configuring WM5102 playback (as used in Wolfsson/CirrusLogic audio card for RPi)

wm5102cfg.sh

#!/bin/sh
#
# wm5102cfg.sh - unified script for configuring WM5102 playback.
# based on scripts in <https://github.com/CirrusLogic/wiki-content/blob/master/scripts/*.sh>
# 
# (C) 2015 - J.W. Janssen <[email protected]>
#         Licensed under Apache License v2.

AMIXER="/usr/bin/amixer"
AMIXER_ARGS="-Dhw:sndrpiwsp"
DEFAULT_VOLUME=80

if [ ! -x $AMIXER ]; then
    echo "$AMIXER not found!"
    exit 1
fi

verbose=0
output=lineout

while getopts hvo: flag
do
    case $flag in
        v)
            verbose=1
            ;;
        o)
            output=$OPTARG
            ;;
        h)
            echo "$0 [-v] [-o OUTPUT]"
            exit 1
            ;;
    esac
done
shift `expr $OPTIND - 1`

if [ $verbose -eq 0 ]; then
  AMIXER_ARGS="${AMIXER_ARGS} -q"
fi

amixer_cset() {
    $AMIXER $AMIXER_ARGS cset "name='$1'" $2
}

reset_all() {
    amixer_cset "HPOUT1 Digital Switch" off
    amixer_cset "HPOUT2 Digital Switch" off
    amixer_cset "SPDIF Out Switch" off
    amixer_cset "SPDIF In Switch" off
    amixer_cset "Tx Source" AIF
    amixer_cset "AIF2TX1 Input 1" None
    amixer_cset "AIF2TX2 Input 1" None
    amixer_cset "AIF1TX1 Input 1" None
    amixer_cset "AIF1TX2 Input 1" None
    amixer_cset "HPOUT1L Input 1" None
    amixer_cset "HPOUT1R Input 1" None
    amixer_cset "HPOUT1L Input 2" None
    amixer_cset "HPOUT1R Input 2" None
    amixer_cset "HPOUT2L Input 1" None
    amixer_cset "HPOUT2R Input 1" None
    amixer_cset "HPOUT2L Input 2" None
    amixer_cset "HPOUT2R Input 2" None
    amixer_cset "Headset Mic Switch" off
    amixer_cset "DMIC Switch" off
    amixer_cset "SPKOUTL Input 1" None
    amixer_cset "SPKOUTR Input 1" None
    amixer_cset "SPKOUTL Input 2" None
    amixer_cset "SPKOUTR Input 2" None
    amixer_cset "Speaker Digital Switch" off
}

playback_to_speaker() {
    # Playback from AP to Speaker
    amixer_cset "Speaker Digital Volume" 128
    # reset speaker mixer inputs
    amixer_cset "SPKOUTL Input 1" None
    amixer_cset "SPKOUTR Input 1" None
    amixer_cset "SPKOUTL Input 2" None
    amixer_cset "SPKOUTR Input 2" None
    # Route AP to Speaker mixer
    amixer_cset "SPKOUTL Input 1" AIF1RX1
    amixer_cset "SPKOUTL Input 1 Volume" $DEFAULT_VOLUME
    amixer_cset "SPKOUTR Input 1" AIF1RX2
    amixer_cset "SPKOUTR Input 1 Volume" $DEFAULT_VOLUME
    # Unmute speaker output
    amixer_cset "Speaker Digital Switch" on
}

playback_to_lineout() {
    # Clear the HPOUT2 Input 1 and 2  mixers. This will ensure no previous paths
    # are connected to the HPOUT2. Note: this doesn't include inputs 3 and 4...
    amixer_cset "HPOUT2L Input 1" None
    amixer_cset "HPOUT2R Input 1" None
    amixer_cset "HPOUT2L Input 2" None
    amixer_cset "HPOUT2R Input 2" None
    # Setup HPOUT2 input path and volume
    amixer_cset "HPOUT2L Input 1" AIF1RX1
    amixer_cset "HPOUT2L Input 1 Volume" $DEFAULT_VOLUME
    amixer_cset "HPOUT2R Input 1" AIF1RX2
    amixer_cset "HPOUT2R Input 1 Volume" $DEFAULT_VOLUME
    # Unmute HPOUT2 Output
    amixer_cset "HPOUT2 Digital Switch" on
}

playback_to_headset() {
    # Playback from AP to Headset
    # Set path gain to -6dB for safety. ie max 0.5Vrms output level.
    amixer_cset "HPOUT1 Digital Volume" 116
    # Clear the HPOUT1 Input 1 and 2 mixers. This will ensure no previous paths
    # are connected to the HPOUT1. Note: this doesn't include inputs 3 and 4...
    amixer_cset "HPOUT1L Input 1" None
    amixer_cset "HPOUT1R Input 1" None
    amixer_cset "HPOUT1L Input 2" None
    amixer_cset "HPOUT1R Input 2" None
    # Setup HPOUT1 input path and volume
    amixer_cset "HPOUT1L Input 1" AIF1RX1
    amixer_cset "HPOUT1L Input 1 Volume" $DEFAULT_VOLUME
    amixer_cset "HPOUT1R Input 1" AIF1RX2
    amixer_cset "HPOUT1R Input 1 Volume" $DEFAULT_VOLUME
    # Unmute the HPOUT1 Outputs
    amixer_cset "HPOUT1 Digital Switch" on
}

playback_to_spdif() {
    # Playback to SPDIF Out Enable
    amixer_cset "SPDIF Out Switch" on
    # Setup WM5102 AIF2 stereo output source from AIF1 (data from AP), 0dB Gain
    amixer_cset "Tx Source" AIF
    amixer_cset "AIF2TX1 Input 1" AIF1RX1
    amixer_cset "AIF2TX1 Input 1 Volume" $DEFAULT_VOLUME
    amixer_cset "AIF2TX2 Input 1" AIF1RX2
    amixer_cset "AIF2TX2 Input 1 Volume" $DEFAULT_VOLUME
}

# Main: set the correct output
case $output in
    sp|speaker)
        echo "\033[1mSetting playback to speaker...\033[0m"
        reset_all
        playback_to_speaker
        ;;
    lo|lineout)
        echo "\033[1mSetting playback to line out...\033[0m"
        reset_all
        playback_to_lineout
        ;;
    digital|spdif)
        echo "\033[1mSetting playback to SPDIF...\033[0m"
        reset_all
        playback_to_spdif
        ;;
    *)
        echo "\033[1;31mInvalid output: $output!\033[0m"
        echo "-> use 'sp' or 'speaker' for speaker output;"
        echo "-> use 'lo' or 'lineout' for line out;"
        echo "-> use 'digital' or 'spdif' for digital output."
        exit 1
        ;;
esac

###EOF###