#!/bin/sh

KERNEL_NEW=uImage-2.6.32.13
KERNEL_OLD=uImage-2.6.29-rc3

if [ $# -eq 0 ] ; then
        echo "Usage: $0 old|new [rootfs_prefix]"
        exit 1
fi
if [ $# -eq 2 ] ; then
        PREFIX=$2
else
        PREFIX=
fi

MODEMPY=${PREFIX}/usr/lib/python2.6/site-packages/framework/subsystems/ogsmd/modems/ti_calypso/modem.py
GPSPY=${PREFIX}/usr/lib/python2.6/site-packages/framework/subsystems/ogpsd/om.py
CFGDIR=${PREFIX}/etc/freesmartphone/conf/openmoko_gta
GSMD=${CFGDIR}/fsogsmd.conf
CFGXORG=${PREFIX}/etc/X11/xorg.conf
LIBPHONECFG=${PREFIX}/etc/libphoneui.conf

echo "Switching to $1 in rootfs ${PREFIX}/"

link_kernel()
{
        echo -n "linking kernel..."
        cd ${PREFIX}/boot
        ln -sf $1 uImage
        echo " OK"
}

link_alsa_states()
{
        echo -n "linking alsa states..."
        cd $CFGDIR
        rm -f alsa-default
        ln -sf alsa-${1} alsa-default
        echo " OK"
}

sed_file()
{
        echo -n "adjusting file `basename $1`..."
        sed -i -e "$2" $1
        echo " OK"
}

cd /boot
if [ "$1"Z == "newZ" ]; then
        sed_file $MODEMPY "s#/neo1973-pm-gsm.0/#/gta02-pm-gsm.0/#g"
        sed_file $GSMD "s#/neo1973-pm-gsm.0/#/gta02-pm-gsm.0/#g"
        sed_file $GPSPY "s#neo1973-pm-gps.0/power_on#gta02-pm-gps.0/power_on#"
        sed_file $CFGXORG "s#event4#event2#"
        sed_file $LIBPHONECFG "s#Mono Mixer Sidetone Playback Sw#Mono Mixer Sidetone Playback Switch#g"
        link_kernel $KERNEL_NEW
        link_alsa_states 2.6.31
else   
        sed_file $MODEMPY "s#/gta02-pm-gsm.0/#/neo1973-pm-gsm.0/#g"
        sed_file $GSMD "s#/gta02-pm-gsm.0/#/neo1973-pm-gsm.0/#g"
        sed_file $GPSPY "s#gta02-pm-gps.0/power_on#neo1973-pm-gps.0/power_on#"
        sed_file $CFGXORG "s#event2#event4#"
        sed_file $LIBPHONECFG "s#Mono Mixer Sidetone Playback Switch#Mono Mixer Sidetone Playback Sw#g"
        link_kernel $KERNEL_OLD
        link_alsa_states 2.6.29
fi
echo -n "cleaning precompiled python stuff..."
rm -f "$MODEMPY"o >/dev/null
rm -f "$GPSPY"o >/dev/null
echo " OK"
echo -n "updating modules..."
update-modules
echo " OK"