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#!/usr/bin/env python
#
# This file is part of the coreboot project.
#
# Copyright (c) 2015 MediaTek Inc.
# Author: Tristan Shieh <tristan.shieh@mediatek.com>
#
# 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; version 2 of the License.
#
# 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 struct
import sys
import hashlib
def read(path):
with open(path, "rb") as f:
return f.read()
def write(path, data):
with open(path, "wb") as f:
f.write(data)
def padding(data, size, pattern = '\0'):
return data + pattern * (size - len(data))
def align(data, size, pattern = '\0'):
return padding(data, (len(data) + (size - 1)) & ~(size - 1), pattern)
gfh_infos = {
'mt8173': struct.pack("44I",
0x014d4d4d, 0x00000038, 0x454c4946, 0x464e495f,
0x0000004f, 0x00000001, 0x01050001, 0x000C0f50,
0xffffffff, 0x00020000, 0x000000a8, 0x00000020,
0x000000B0, 0x00000001, 0x014d4d4d, 0x0001000c,
0x00000001, 0x034d4d4d, 0x00070064, 0x00001182,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00006400, 0x00001388,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
)}
def gen_emmc_header(data):
header = (padding(struct.pack("<12sII", "EMMC_BOOT", 1, 512), 512, '\xff') +
padding(struct.pack("<8sIIIIIIII", "BRLYT", 1, 2048, 2048 + len(data),
0x42424242, 0x00010005, 2048, 2048 + len(data), 1) + '\0' * 140, 512, '\xff') +
'\0' * 1024)
return header
def gen_sf_header(data):
header = (padding(struct.pack("<12sII", "SF_BOOT", 1, 512), 512, '\xff') +
padding(struct.pack("<8sIIIIIIII", "BRLYT", 1, 2048, 2048 + len(data),
0x42424242, 0x00010007, 2048, 2048 + len(data), 1) + '\0' * 140, 512, '\xff') +
'\0' * 1024)
return header
gen_dev_header = {
"emmc": gen_emmc_header,
"sf": gen_sf_header
}
def gen_preloader(chip_ver, flash_type, data):
gfh_info = gfh_infos[chip_ver]
gfh_info = gfh_info[0:32] + struct.pack("1I", len(data)+len(gfh_info)+32) + gfh_info[36:len(gfh_info)]
gfh_hash = hashlib.sha256(gfh_info + data).digest()
data = align(gfh_info + data + gfh_hash, 512, '\xff')
header = gen_dev_header[flash_type](data)
return header + data
def main(argv):
if len(argv) != 5:
print "Usage: %s <chip> <flash_type> <input_file> <output_file>" % argv[0]
print "\t flash_type: emmc/sf"
print "\t chip : mt8173"
exit(1)
write(argv[4], gen_preloader(argv[1], argv[2], read(argv[3])))
if __name__ == "__main__":
main(sys.argv)
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