disassemble.py

#
# usage: python disassemble.py < firmware-4.bin
# output:
#  - stdout
#  - files: fw.bin, otp.bin (WARN: will overwrite existing files!)
#
import sys
import struct

def round_up(x):
        return int((x+3)/4*4)

def dump_file(name, data, length):
        print "output to %s (%d bytes)" % (name, length)
        with open(name, "w") as f:
                f.write(data)
                f.truncate(length)

def dump_str(name, data, length):
        print "%s = %s" % (name, data)

handlers = {
        0: lambda d, l: dump_str("version", d, l),
        1: lambda d, l: dump_str("timestamp", struct.unpack("<I", d)[0], l),
        2: lambda d, l: dump_str("features", d.encode("hex"), l),
        3: lambda d, l: dump_file("fw.bin", d, l),
        4: lambda d, l: dump_file("otp.bin", d, l),
        5: lambda d, l: dump_str("op_version", struct.unpack("<I", d)[0], l)
}

magic = "QCA-ATH10K\0"
assert sys.stdin.read(len(magic)) == magic
sys.stdin.read(round_up(len(magic)) - len(magic))

while 1:
        (t, l, ) = struct.unpack("<II", sys.stdin.read(8))
        d = sys.stdin.read(round_up(l))
        handlers[t](d, l)

I use this script to extract /lib/firmware/ath10k/firmware-4.bin
(to use QCA6174 HW2.1)
" Traceback (most recent call last):
File "disassemble.py", line 11, in
assert sys.stdin.read(len(magic)) == magic
AssertionError "

But I have this problem. :(
Please help me ..

@blogcin: Sorry. This worked with my clean-room blobs so I didn't notice. I've updated the gist. It should work fine now (albeit due to the sloppy design the program will still exit with an exception, which is fine).

Thanks to update!

but it is not work that disassemble otp.bin by python script :(.