#!/bin/sh

HCIATTACH=/bin/hciattach
if grep -q "Pi 4" /proc/device-tree/model; then
  BDADDR=
else
  SERIAL=`cat /proc/device-tree/serial-number | cut -c9-`
  B1=`echo $SERIAL | cut -c3-4`
  B2=`echo $SERIAL | cut -c5-6`
  B3=`echo $SERIAL | cut -c7-8`
  BDADDR=`printf b8:27:eb:%02x:%02x:%02x $((0x$B1 ^ 0xaa)) $((0x$B2 ^ 0xaa)) $((0x$B3 ^ 0xaa))`
fi

if [ -e /sys/class/bluetooth/hci0 ]; then
  # Bluetooth is already enabled
  exit 0
fi

uart0="`cat /proc/device-tree/aliases/uart0`"
serial1="`cat /proc/device-tree/aliases/serial1`"

if [ "$uart0" = "$serial1" ] ; then
	uart0_pins="`wc -c /proc/device-tree/soc/gpio@7e200000/uart0_pins/brcm\,pins | cut -f 1 -d ' '`"
	if [ "$uart0_pins" = "16" ] ; then
		$HCIATTACH /dev/serial1 bcm43xx 3000000 flow - $BDADDR
	else
		$HCIATTACH /dev/serial1 bcm43xx 921600 noflow - $BDADDR
	fi
else
	$HCIATTACH /dev/serial1 bcm43xx 460800 noflow - $BDADDR
fi