#!/bin/sh

CACHE=/var/cache/brcm43xx-mac
if [ -z "$MAC_ADDR" ]; then
	if [ ! -f "$CACHE" ]; then
		echo 43:29:B1$(od -txC -An -N3 /dev/random|tr \  : | tr '[:lower:]' '[:upper:]') >"$CACHE"
	fi
	MAC_ADDR=`cat "$CACHE"`
	echo "Warning: Using self generated MAC address! MAC_ADDR should be defined in /etc/conf.d/bcm43xx."
else
	[ -f "$CACHE" ] && rm "$CACHE"
fi
OPTIONS="$OPTIONS --bd_addr $MAC_ADDR"

# Find chip version
if [ -z "$HCD" ]; then
	DEVS=($( cat /sys/class/mmc_host/mmc*/mmc?\:0001/mmc?\:0001:?/device ))
	for DEV in "${DEVS[@]}"; do
		if [ "${DEV:0:4}" = "0x43" ]; then
			HCD="bcm${DEV:2}.hcd"
		fi
	done
	if [ -z "$HCD" ]; then
		echo "Failed: Unable to locate bluetooth device"
		exit 1
	fi
fi
HCD_BASE=$(basename "$HCD")

# Device specific options
[ "$HCD_BASE" = "bcm4330.hcd" ] && OPTIONS="--no2bytes --enable_lpm --tosleep=50000 $OPTIONS"

[ ! -e "$HCD" ] && HCD="/lib/firmware/brcm/${HCD_BASE}"
if [ ! -e "$HCD" ]; then
	echo "Failed: $HCD does not exist."
	exit 1
fi

# UART TTY can be different for each board
# FIXME: Possibly test each port with hciattach (-n)?
#        For now, just use the highest port as it works for current boards
if [ -z "$TTY" ]; then
	TTYS=($( ls -r1 /dev/ttymxc? ))
	for t in "${TTYS[@]}" ; do
		ttynum=${t:0-1}
		if [ $ttynum -eq 0 ]; then
			echo "Abort: UART ttymcx0 does not seem right."
			exit 1
		else
			TTY=$t
			break
		fi
	done
fi

[ ! -e "$TTY" ] && TTY="/dev/$(basename $TTY)"
if [ ! -e "$TTY" ]; then
	echo "Failed: $TTY does not exist."
	exit 1
fi

echo "Updating bluetooth firmware via $TTY from $HCD."
/usr/bin/brcm_patchram_plus --patchram $HCD --baudrate 3000000 --use_baudrate_for_download $TTY $OPTIONS

# Create a symlink to TTY for hci service
if [ $? -eq 0 ]; then
	ln -sr "$TTY" /dev/brcm43xx
else
	exit 1
fi