#!/bin/sh

function get_devmem()
{
	/usr/bin/devmem2 $1 | grep ": " | cut -d ":" -f 2|cut -d "x" -f 2
}

function hex_to_mac_addr()
{
	addr=$1
	n=0
	mac_addr=$(echo ${addr} | while read -r -n2 c; do 
		if [ ! -z "$c" ]; then
			if [ $n -ne 0 ] ; then
				echo -n ":${c}"
			else
				echo -n "${c}"
			fi
		fi
		n=$(($n+1))
	done)
	echo ${mac_addr}
}

function reverse_bytes()
{
	addr=$1
	New_addr=$(echo ${addr} | while read -r -n2 c; do 
		if [ ! -z "$c" ]; then
			New_addr=${c}${New_addr}
		else echo
			echo ${New_addr}
		fi
	done)
	echo ${New_addr}
}

mac_address="/proc/device-tree/ocp/ethernet@4a100000/slave@4a100300/mac-address"
if [ -f ${mac_address} ] ; then
	DEV_ADDR=$(hexdump -v -e '1/1 "%02X" ":"' ${mac_address} | sed 's/.$//')
else
	DEVMEM_ADDR_LO=$(get_devmem 0x44e10638|bc)
	DEVMEM_ADDR_LO=$(reverse_bytes ${DEVMEM_ADDR_LO})

	DEVMEM_ADDR_HI=$(get_devmem 0x44e1063C)
	DEVMEM_ADDR_HI=$(reverse_bytes ${DEVMEM_ADDR_HI})

	DEV_ADDR=$(hex_to_mac_addr "${DEVMEM_ADDR_HI}${DEVMEM_ADDR_LO}")
fi

SERIAL_NUMBER=$(hexdump -e '8/1 "%c"' /sys/bus/i2c/devices/0-0050/eeprom -s 14 -n 2)-$(hexdump -e '8/1 "%c"' /sys/bus/i2c/devices/0-0050/eeprom -s 16 -n 12)
ISBLACK=$(hexdump -e '8/1 "%c"' /sys/bus/i2c/devices/0-0050/eeprom -s 8 -n 4)

BLACK=""

if [ "${ISBLACK}" = "BBBK" ] ; then
	BLACK="Black"
fi

if [ "${ISBLACK}" = "BNLT" ] ; then
	BLACK="Black"
fi

modprobe g_multi file=/dev/mmcblk0p1 cdrom=0 stall=0 removable=1 nofua=1 iSerialNumber=${SERIAL_NUMBER} iManufacturer=Circuitco  iProduct=BeagleBone${BLACK} host_addr=${DEV_ADDR}

sleep 1

/usr/bin/ifconfig usb0 192.168.7.2 netmask 255.255.255.252
/usr/bin/route add default gw 192.168.7.1

/usr/bin/dhcpd -4 -q -cf /etc/dhcpd-usb0.conf usb0