#!/bin/sh
#
# Copyright (C) 2016 Hardkernel Co,. Ltd
# Joy Cho <joy.cho@hardkernel.com>
#
# SPDX-License-Identifier:      GPL-2.0+
#
# update ddr clock for Ubuntu
#

if [ -z $1 ]; then
        echo "Usage ./c2_update_ddrclk.sh <DDR_CLK (1104 | 912 | 792 | 408)>"
        exit 1
fi

if [ $1 != 1104 -a $1 != 912 -a $1 != 792 -a $1 != 408 ]; then
        echo "Wrong DDRCLK! Usage ./c2_update_ddrclk.sh <DDR_CLK (1104 | 912 | 792 | 408)>"
        exit 1
fi

DDRCLK=$1

bl1=/tmp/bl1.bin.hardkernel.$DDRCLK
tmp=/tmp/temp.bin

##### 1. check the current DDR clock ####
dd if=/dev/mmcblk0 of=$tmp bs=1 count=2 skip=43530 status=none
CUR_DDRCLK=$(hexdump -e '"%d"' $tmp)

if [ $DDRCLK -eq $CUR_DDRCLK ]; then
        echo "current ddr clk is already set as $DDRCLK MHz"
        exit 1
fi

echo "existing DDR clk is $CUR_DDRCLK"

##### 2. download bl1 binary from dn server ####
wget -P /tmp/ http://dn.odroid.com/S905/BootLoader/ODROID-C2/bl1.bin.hardkernel.$DDRCLK
if [ ! -f $bl1 ];then
        echo "error: bl1 binary doesn't exist"
        exit 1
fi

dd if=$bl1 of=/dev/mmcblk0 bs=1 count=442 status=none
dd if=$bl1 of=/dev/mmcblk0 bs=512 skip=1 seek=1 status=none

echo "Update done!"

##### 3. check the updated DDR clock ####
echo "Now let's check if update has been completed..."

dd if=/dev/mmcblk0 of=$tmp bs=1 count=2 skip=43530 status=none

CUR_DDRCLK=$(hexdump -e '"%d"' $tmp)
echo "updated DDR clk is $CUR_DDRCLK"

if [ $DDRCLK != $CUR_DDRCLK ]; then
	echo "updating DDR clock FAIL!! Expected : $DDRCLK, Updated : $CUR_DDRCLK"
else
	echo "updating DDR clock has been completed!!!"
fi

rm $bl1
rm $tmp