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#!/bin/bash

TEMP_HIGH=95 # degrees C
FREQ_MAX=900 # MHz
FREQ_STEP_UP=5 # MHz
FREQ_STEP_DOWN=30 # MHz
MEM_FREQ=150 # MHz
HOLD_TIME=15 # sec
TOLERANCE=2 # degrees C
IGNORE_TEMP=$((TEMP_HIGH-TOLERANCE))
OUTPUT_INTERVAL=1 # sec

holds=( 0 0 0 0 0 0 0 0 )

setclock() {
	id=$1
	clock=$2
	if [ $clock -gt $FREQ_MAX ]; then
		clock=$FREQ_MAX
	fi
	aticonfig --adapter=$id --odsc=$clock,$MEM_FREQ 2>&1 > /dev/null
	holds[$id]=$HOLD_TIME
}

reclock() {
	id=$1
	temp=$2
	clock=$3
	flag='-'
	hold=${holds[$id]}
	if [ $hold -gt 0 ]; then
		holds[$i]=$((${holds[$id]}-OUTPUT_INTERVAL))
	elif [ $temp -ge $TEMP_HIGH ]; then
		setclock $id $((clock-FREQ_STEP_DOWN))
		flag='v'
	elif [ $clock -lt $FREQ_MAX -a $temp -lt $IGNORE_TEMP ]; then
		setclock $id $((clock+FREQ_STEP_UP))
		flag='^'
	fi
	echo -n "$temp ($clock$flag) "
}

aticonfig --od-enable 2>&1 > /dev/null

while true
do
	unset T
	unset C
	temps=`aticonfig --adapter=all --odgt | grep : | sed 's/.* - \([0-9]*\)\..*/\1/'`
	clocks=`aticonfig --adapter=all --odgc | grep "Current Peak" | sed 's/.*: *\([0-9]*\) .*/\1/'`
	i=0
	for val in $temps; do
		T[$i]=$val
		i=$((i+1))
	done
	
	i=0
	for val in $clocks; do
		C[$i]=$val
		i=$((i+1))
	done

	i=0
	while [ $i -lt ${#T[*]} ]; do
		reclock $i ${T[$i]} ${C[$i]}
		i=$((i+1))
	done
	
	echo
	sleep $OUTPUT_INTERVAL
done