#!/usr/bin/python3
"""
#   A small script to dump the contents of a brcm80211 initvals section
#
#   Copyright (C) 2010  Michael Buesch <m@bues.ch>
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License version 2
#   as published by the Free Software Foundation.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
"""

import sys


def usage():
	print("brcm80211 initvals section dumper")
	print("Prints a .initvals assembly section to stdout.")
	print("")
	print("Copyright (C) 2010 Michael Buesch <m@bues.ch>")
	print("Licensed under the GNU/GPL version 2")
	print("")
	print("Usage: brcm80211-ivaldump FILE")
	print("")
	print("FILE is the file that is going to be dumped")
	return

if len(sys.argv) != 2:
	usage()
	sys.exit(1)

filename = sys.argv[1]

try:
	ivals = open(filename, "rb").read()
except IOError as e:
	print("Could not read the initvals file: %s" % e.strerror)
	sys.exit(1)

if len(ivals) == 0 or len(ivals) % 8 != 0:
	print("The input file is malformed.")
	sys.exit(1)

sectname = filename.split('/')[-1]
if sectname.endswith(".fw"):
	sectname = sectname[:-3]
print(".initvals(%s)" % sectname)
for idx in range(0, len(ivals), 8):
	addr = ivals[idx + 0]
	addr |= ivals[idx + 1] << 8
	size = ivals[idx + 2]
	size |= ivals[idx + 3] << 8
	value = ivals[idx + 4]
	value |= ivals[idx + 5] << 8
	value |= ivals[idx + 6] << 16
	value |= ivals[idx + 7] << 24

	if addr == 0xFFFF:
		break
	if size == 4:
		print("\tmmio32\t0x%08X, 0x%04X" % (value, addr))
	elif size == 2:
		if value & 0xFFFF0000:
			print("The input file is malformed (invalid value for 16bit field)")
			sys.exit(1)
		print("\tmmio16\t0x%04X, 0x%04X" % (value, addr))
	else:
		print("The input file is malformed (invalid size field: 0x%04X)" % size)
		sys.exit(1)
