disassembler/brcm80211fwconv

   1 #!/usr/bin/env python
   2 """
   3 #   Copyright (C) 2010  Michael Buesch <mb@bu3sch.de>
   4 #
   5 #   This program is free software; you can redistribute it and/or modify
   6 #   it under the terms of the GNU General Public License version 2
   7 #   as published by the Free Software Foundation.
   8 #
   9 #   This program is distributed in the hope that it will be useful,
  10 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 #   GNU General Public License for more details.
  13 """
  14
  15 import sys
  16 import getopt
  17
  18 def indexToName(index):
  19         D11UCODE_NAMETAG_START          = 0
  20         D11LCN0BSINITVALS24             = 1
  21         D11LCN0INITVALS24               = 2
  22         D11LCN1BSINITVALS24             = 3
  23         D11LCN1INITVALS24               = 4
  24         D11LCN2BSINITVALS24             = 5
  25         D11LCN2INITVALS24               = 6
  26         D11N0ABSINITVALS16              = 7
  27         D11N0BSINITVALS16               = 8
  28         D11N0INITVALS16                 = 9
  29         D11UCODE_OVERSIGHT16_MIMO       = 10
  30         D11UCODE_OVERSIGHT16_MIMOSZ     = 11
  31         D11UCODE_OVERSIGHT24_LCN        = 12
  32         D11UCODE_OVERSIGHT24_LCNSZ      = 13
  33         D11UCODE_OVERSIGHT_BOMMAJOR     = 14
  34         D11UCODE_OVERSIGHT_BOMMINOR     = 15
  35
  36         namemap = {
  37                 D11UCODE_NAMETAG_START          : "start",
  38                 D11LCN0BSINITVALS24             : "LCN0 bs initvals 24",
  39                 D11LCN0INITVALS24               : "LCN0 initvals 24",
  40                 D11LCN1BSINITVALS24             : "LCN1 bs initvals 24",
  41                 D11LCN1INITVALS24               : "LCN1 initvals 24",
  42                 D11LCN2BSINITVALS24             : "LCN2 bs initvals 24",
  43                 D11LCN2INITVALS24               : "LCN2 initvals 24",
  44                 D11N0ABSINITVALS16              : "N0A bs initvals 16",
  45                 D11N0BSINITVALS16               : "N0 bs initvals 16",
  46                 D11N0INITVALS16                 : "N0 initvals 16",
  47                 D11UCODE_OVERSIGHT16_MIMO       : "microcode 16 MIMO",
  48                 D11UCODE_OVERSIGHT16_MIMOSZ     : "microcode 16 MIMO size",
  49                 D11UCODE_OVERSIGHT24_LCN        : "microcode 24 LCN",
  50                 D11UCODE_OVERSIGHT24_LCNSZ      : "microcode 24 LCN size",
  51                 D11UCODE_OVERSIGHT_BOMMAJOR     : "bom major",
  52                 D11UCODE_OVERSIGHT_BOMMINOR     : "bom minor",
  53         }
  54         try:
  55                 return namemap[index]
  56         except KeyError:
  57                 return "Unknown"
  58
  59 def parseHeader(hdr_data):
  60         sections = []
  61         for i in range(0, len(hdr_data), 3 * 4):
  62                 offset = ord(hdr_data[i + 0]) | (ord(hdr_data[i + 1]) << 8) |\
  63                         (ord(hdr_data[i + 2]) << 16) | (ord(hdr_data[i + 3]) << 24)
  64                 length = ord(hdr_data[i + 4]) | (ord(hdr_data[i + 5]) << 8) |\
  65                         (ord(hdr_data[i + 6]) << 16) | (ord(hdr_data[i + 7]) << 24)
  66                 index = ord(hdr_data[i + 8]) | (ord(hdr_data[i + 9]) << 8) |\
  67                         (ord(hdr_data[i + 10]) << 16) | (ord(hdr_data[i + 11]) << 24)
  68
  69                 sections.append( (offset, length, index) )
  70         sections.sort(key = lambda x: x[2]) # Sort by index
  71         return sections
  72
  73 def generateHeaderData(sections):
  74         data = []
  75         for section in sections:
  76                 (offset, length, index) = section
  77                 data.append(chr(offset & 0xFF))
  78                 data.append(chr((offset >> 8) & 0xFF))
  79                 data.append(chr((offset >> 16) & 0xFF))
  80                 data.append(chr((offset >> 24) & 0xFF))
  81                 data.append(chr(length & 0xFF))
  82                 data.append(chr((length >> 8) & 0xFF))
  83                 data.append(chr((length >> 16) & 0xFF))
  84                 data.append(chr((length >> 24) & 0xFF))
  85                 data.append(chr(index & 0xFF))
  86                 data.append(chr((index >> 8) & 0xFF))
  87                 data.append(chr((index >> 16) & 0xFF))
  88                 data.append(chr((index >> 24) & 0xFF))
  89         return "".join(data)
  90
  91 def getSectionByIndex(sections, searchIndex):
  92         for section in sections:
  93                 (offset, length, index) = section
  94                 if searchIndex == index:
  95                         return section
  96         return None
  97
  98 def parseHeaderFile(hdr_filepath):
  99         try:
 100                 hdr_data = file(hdr_filepath, "rb").read()
 101         except (IOError), e:
 102                 print "Failed to read header file: %s" % e.strerror
 103                 return None
 104         if len(hdr_data) % (3 * 4) != 0:
 105                 print "Invalid header file format"
 106                 return None
 107         return parseHeader(hdr_data)
 108
 109 def dumpInfo(hdr_filepath):
 110         sections = parseHeaderFile(hdr_filepath)
 111         if not sections:
 112                 return 1
 113         for section in sections:
 114                 (offset, length, index) = section
 115                 print "Index %2d   %24s    ==>  offset:0x%08X  length:0x%08X" %\
 116                         (index, indexToName(index), offset, length)
 117         return 0
 118
 119 def extractSection(hdr_filepath, bin_filepath, extractIndex, outfilePath):
 120         sections = parseHeaderFile(hdr_filepath)
 121         if not sections:
 122                 return 1
 123         section = getSectionByIndex(sections, extractIndex)
 124         if not section:
 125                 print "Did not find a section with index %d" % extractIndex
 126                 return 1
 127         (offset, length, index) = section
 128         try:
 129                 bin_data = file(bin_filepath, "rb").read()
 130         except (IOError), e:
 131                 print "Failed to read bin file: %s" % e.strerror
 132                 return 1
 133         try:
 134                 outfile = file(outfilePath, "wb")
 135                 outfile.write(bin_data[offset : offset + length])
 136         except IndexError:
 137                 print "Binfile index error."
 138                 return 1
 139         except (IOError), e:
 140                 print "Failed to write output file: %s" % e.strerror
 141                 return 1
 142         return 0
 143
 144 def mergeSection(hdr_filepath, bin_filepath, mergeIndex, mergefilePath):
 145         sections = parseHeaderFile(hdr_filepath)
 146         if not sections:
 147                 return 1
 148         try:
 149                 bin_data = file(bin_filepath, "rb").read()
 150         except (IOError), e:
 151                 print "Failed to read bin file: %s" % e.strerror
 152                 return 1
 153         try:
 154                 merge_data = file(mergefilePath, "rb").read()
 155         except (IOError), e:
 156                 print "Failed to open merge output file: %s" % e.strerror
 157                 return 1
 158         newBin = []
 159         newSections = []
 160         newOffset = 0
 161         for section in sections:
 162                 (offset, length, index) = section
 163                 if index == mergeIndex:
 164                         # We overwrite this section
 165                         newBin.append(merge_data)
 166                         newSections.append( (newOffset, len(merge_data), index) )
 167                         newOffset += len(merge_data)
 168                 else:
 169                         try:
 170                                 newBin.append(bin_data[offset : offset + length])
 171                         except IndexError:
 172                                 print "Failed to read input data"
 173                                 return 1
 174                         newSections.append( (newOffset, length, index) )
 175                         newOffset += length
 176         newBin = "".join(newBin)
 177         newHdr = generateHeaderData(newSections)
 178         try:
 179                 file(bin_filepath, "wb").write(newBin)
 180                 file(hdr_filepath, "wb").write(newHdr)
 181         except (IOError), e:
 182                 print "Failed to write bin or header file: %s" % e.strerror
 183                 return 1
 184         return 0
 185
 186 def usage():
 187         print "BRCM80211 firmware converter tool"
 188         print ""
 189         print "Usage: %s [OPTIONS]" % sys.argv[0]
 190         print ""
 191         print "  -H|--header FILE         Use FILE as header file"
 192         print "  -B|--bin FILE            Use FILE as bin file"
 193         print ""
 194         print "Actions:"
 195         print "  -d|--dump                Dump general information"
 196         print "  -x|--extract INDEX:FILE  Extract the section with index INDEX to FILE"
 197         print "  -m|--merge INDEX:FILE    Merges FILE into the bin file stream at INDEX"
 198         print "                           A Merge modifies the files specified in -H and -B"
 199         print ""
 200         print "  -h|--help                Print this help text"
 201
 202 def main():
 203         opt_header = None
 204         opt_bin = None
 205         opt_action = None
 206         opt_index = None
 207         opt_outfile = None
 208         opt_mergefile = None
 209
 210         try:
 211                 (opts, args) = getopt.getopt(sys.argv[1:],
 212                         "hH:B:dx:m:",
 213                         [ "help", "header=", "bin=", "dump", "extract=", "merge=", ])
 214         except getopt.GetoptError:
 215                 usage()
 216                 return 1
 217         for (o, v) in opts:
 218                 if o in ("-h", "--help"):
 219                         usage()
 220                         return 0;
 221                 if o in ("-H", "--header"):
 222                         opt_header = v
 223                 if o in ("-B", "--bin"):
 224                         opt_bin = v
 225                 if o in ("-d", "--dump"):
 226                         opt_action = "dump"
 227                 if o in ("-x", "--extract"):
 228                         opt_action = "extract"
 229                         try:
 230                                 v = v.split(':')
 231                                 opt_index = int(v[0])
 232                                 opt_outfile = v[1]
 233                         except IndexError, ValueError:
 234                                 print "Invalid -x|--extract index number\n"
 235                                 usage()
 236                                 return 1
 237                 if o in ("-m", "--merge"):
 238                         opt_action = "merge"
 239                         try:
 240                                 v = v.split(':')
 241                                 opt_index = int(v[0])
 242                                 opt_mergefile = v[1]
 243                         except IndexError, ValueError:
 244                                 print "Invalid -m|--merge index and/or merge file name\n"
 245                                 usage()
 246                                 return 1
 247         if not opt_action:
 248                 print "No action specified\n"
 249                 usage()
 250                 return 1
 251         if opt_action == "dump":
 252                 if not opt_header:
 253                         print "No header file specified\n"
 254                         usage()
 255                         return 1
 256                 return dumpInfo(opt_header)
 257         elif opt_action == "extract":
 258                 if not opt_header or not opt_bin:
 259                         print "No header or bin file specified\n"
 260                         usage()
 261                         return 1
 262                 return extractSection(opt_header, opt_bin, opt_index, opt_outfile)
 263         elif opt_action == "merge":
 264                 if not opt_header or not opt_bin:
 265                         print "No header or bin file specified\n"
 266                         usage()
 267                         return 1
 268                 return mergeSection(opt_header, opt_bin, opt_index, opt_mergefile)
 269         return 1
 270
 271 if __name__ == "__main__":
 272         sys.exit(main())