Read Focaltech touchpanel eeprom

rfw.sh

#!/system/bin/sh

# Check if needed tools are in path
which i2cget i2cset i2cdetect 1&>/dev/null || (echo "No i2ctools available!" && exit 0)
which seq 1&>/dev/null || (echo "Need seq tool to work!" && exit 0)

function into_fw_mode() 
{
    DELAY_AA=0.01
    DELAY_55=0.03
    i2cset -y -f 1 0x38 0xBC 0xAA
    sleep $DELAY_AA
    i2cset -y -f 1 0x38 0xBC 0x55
    sleep $DELAY_55   
    i2cset -y -f 1 0x38 0x55 0xAA
}

function read_word()
{
    i2cset -y -f 1 0x38 0x03 0x00
    i2cset -y -f 1 0x38 $1 $2
    word=`i2cget -y -f 1 0x38 0x00 w`
    echo -e -n "\x${word:4:2}\x${word:2:2}"
}

if [[ `i2cdetect -y 1 0x38 0x38 | grep -Eq 'UU|38' && echo 1` == "1" ]]; then
    echo "Device found!"
else
    echo "Device not found!"
    exit 0
fi

mode=`i2cget -y -f 1 0x38 0x00`
chip="`i2cget -y -f 1 0x38 0xA3``i2cget -y -f 1 0x38 0x9F`"
chip=`echo ${chip//0x}`

ver=`i2cget -y -f 1 0x38 0xA6`
state=`i2cget -y -f 1 0x38 0xA7`
echo "Touchpanel is ${chip}. FW version is: ${ver}, state ${state}. Mode is ${mode}"
if [[ ${chip} == "6426" ]]; then
    into_fw_mode
    # Get the bootloader version to ensure we're in FW burn mode
    i2cset -y -f 1 0x38 0x90 0x00 
    i2cset -y -f 1 0x38 0x00 0x00
    version=`i2cget -y -f 1 0x38 0x00 w`
    if [[ ${version:2:2} == "00" || ${version:2:2} == "ff" ]]; then
        echo "Failed to get into FW mode!"
        exit 0
    fi
    
    echo "Bootloader version is ${version}."
    
    rm /cache/rom
    
    echo -n "Dumping data...Be patient"

    for i in `seq 0 255`; do
        progress=$((i*100/255))
        echo -n "\rDumping data...Be patient ${progress} %" 
        
        for j in `seq 0 2 255`; do
            read_word $i $j >> /cache/rom
        done
    done
    
    # Return to normal mode
    i2cset -y -f 1 0x38 0x07
else 
    echo "Touchpanel chip is not recognized. Modify file to match your TP!"
exit 0
fi

echo "Done!"
exit 1