Init blutooth without systemd

#! /bin/sh

gpio_start()
{
    echo 10 > /sys/class/gpio/export

    if [ -d /sys/class/gpio/gpio10 ]
    then
        echo out > /sys/class/gpio/gpio10/direction
        echo 0 > /sys/class/gpio/gpio10/value
        echo 1 > /sys/class/gpio/gpio10/value

        echo "GPIO OK"
    else
        echo "GPIO error"
    fi

    return 0
}

modprobe bluetooth
modprobe hci_uart
modprobe bnep
modprobe rfcomm

if [ -f "/lib/firmware/ap6212/bcm43438a0.hcd" ]
then
        mkdir -p /etc/firmware/ap6212
        cp /lib/firmware/ap6212/bcm43438a0.hcd /etc/firmware/ap6212/4343A0.hcd
fi


PORT="ttyS1"

if [ @? ]
then
    btattach -B /dev/$PORT &

    sleep 0.5
    rfcomm

    /usr/libexec/bluetooth/bluetoothd -d &
fi

/usr/sbin/rfkill "unblock" "all"

if [ @? ]
then
    echo "BT unlocked"
    devmem2 0x1f00060 b 1
    gpio_start
    sleep 0.5

    if [ -n $(hciconfig hci0 up) ]
    then
        echo "Bluetooth ready"
        return 0
    else
        echo "Error bluetooth"
        return 1
    fi

else
    echo "BT locked"
fi