#!/bin/sh -e
#
# flashnor - Flash a file into NOR (M58WR016KB)
#
# Copyright (C) 2008 by OpenMoko, Inc.
# Written by Werner Almesberger <werner@openmoko.org>
# All Rights Reserved
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#


DEV=/dev/mtd0


usage()
{
    echo "usage: $0 nor.bin" 1>&2
    exit 1
}


check()
{
    nor=`dd if=$DEV bs=$size count=1 | md5sum`
    [ "$nor" = "$ref" ]
}


empty()
{
    ff=`dd if=/dev/zero bs=$size count=1 | tr '\000' '\377' | md5sum`
    [ "$ff" = "$nor" ]
}


[ -z "$1" -o ! -z "$2" ] && usage

size=`ls -l "$1" | awk '{ print $5 }'`
if [ $size -lt 65536 ]; then
    blocks=`expr \( $size + 8191 \) / 8192`
else
    blocks=`expr \( $size - 65536 + 65535 \) / 65536 + 8`
fi

ref=`md5sum <"$1"`
check && exit
flash_unlock $DEV
empty || flash_erase $DEV 0 $blocks
cat "$1" >$DEV
flash_lock /dev/mtd0 0 -1
check