diff options
Diffstat (limited to 'scripts/flashing/adam2flash-502T.pl')
| -rwxr-xr-x | scripts/flashing/adam2flash-502T.pl | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/scripts/flashing/adam2flash-502T.pl b/scripts/flashing/adam2flash-502T.pl new file mode 100755 index 0000000..0c4c9d7 --- /dev/null +++ b/scripts/flashing/adam2flash-502T.pl @@ -0,0 +1,342 @@ +#!/usr/bin/env perl +# +# D-Link DSL-502T flash utility +# +# Copyright (c) 2007 Oliver Jowett <oliver@opencloud.com> +# +# Based on adam2flash.pl for the D-Link DSL-G6x4T, which is: +# Copyright (C) 2005 Felix Fietkau <mailto@nbd.name> +# based on fbox recovery util by Enrik Berkhan +# +# 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. +# +# 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. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +# + +# The default DSL-502T mtd map looks like this: +# +# mtd0 0x90091000,0x903f0000 # filesystem +# mtd1 0x90010090,0x90091000 # kernel +# mtd2 0x90000000,0x90010000 # bootloader - DO NOT MODIFY +# mtd3 0x903f0000,0x90400000 # config space - DO NOT MODIFY +# mtd4 0x90010000,0x903f0000 # firmware signature + kernel + filesystem, used to flash new firmware +# +# i.e. the flash layout is: +# +# 90000000-9000FFFF mtd2 bootloader +# 90010000-9001008F ---- firmware signature ) +# 90010090-90090FFF mtd1 kernel ) mtd4 spans these three regions +# 90091000-903EFFFF mtd0 filesystem ) +# 903F0000-903FFFFF mtd3 config space +# +# The ADAM2 bootloader uses the mtd1 settings to find the start of the image to boot. +# The image to load contains information about the loadable size of the image. If ADAM2 sees +# that the image appears to extend beyond the end of mtd1, it will refuse to load it. On +# the DSL-502T, this manifests as the USB light blinking rapidly on boot. +# +# The OpenWRT kernel does not follow quite the same layout: +# (a) it does not have a 0x90-byte firmware signature prefix +# (b) it is larger than the default mtd1 size +# +# (a) would be avoidable (build a custom image with a 0x90-byte prefix) but (b) is unavoidable. +# So we *have* to change mtd1. The simplest thing to do seems to make it span all of +# the flashable area, producing this layout: +# +# mtd0 0x90091000,0x903f0000 # filesystem +# mtd1 0x90010000,0x903f0000 # kernel (CHANGED) +# mtd2 0x90000000,0x90010000 # bootloader - DO NOT MODIFY +# mtd3 0x903f0000,0x90400000 # config space - DO NOT MODIFY +# mtd4 0x90010000,0x903f0000 # kernel + filesystem, used to flash new firmware +# +# *** NOTE NOTE NOTE NOTE *** +# +# /dev/mtd0 .. /dev/mtd4 when using OpenWRT do **NOT** correspond to the ADAM2 mtd0-4 settings! +# Instead, OpenWRT scans the MTD itself and determines its own boundaries which are arranged +# quite differently to ADAM2. It will look something like this, see dmsg on boot: +# +# (/dev/mtd0) 0x00000000-0x00010000 : "loader" # Bootloader, read-only +# (/dev/mtd1) 0x003f0000-0x00400000 : "config" # Config space +# (/dev/mtd2) 0x00010000-0x003f0000 : "linux" # Firmware area (kernel + root fs + JFFS area) +# (/dev/mtd3) 0x000d0d58-0x003f0000 : "rootfs" # Root FS, starts immediately after kernel +# (/dev/mtd4) 0x00280000-0x003f0000 : "rootfs_data" # If rootfs is squashfs, start of JFFS area. +# +# All of those boundaries are autodetected by examining the data in flash. +# +# *** NOTE NOTE NOTE NOTE *** + +use IO::Socket::INET; +use Socket; +use strict; +use warnings; + +sub usage() { + print STDERR "Usage: $0 <ip> [-setmtd1] [-noflash] [firmware.bin]\n\n"; + print STDERR "Acquires the ADAM2 bootloader of a D-Link DSL-504T at <ip>\n"; + print STDERR "Power off the device, start this script, then power it on.\n"; + print STDERR "<ip> may be any spare address on the local subnet.\n\n"; + print STDERR "If a firmware file is specified, MTD settings are verified and\n"; + print STDERR "then the firmware is written to the router's flash.\n"; + print STDERR "The firmware type (D-Link or OpenWRT) is automatically detected.\n\n"; + print STDERR " -setmtd1 update mtd1 if it is not the appropriate value for this firmware\n"; + print STDERR " -noflash does normal checks, updates mtd1 if requested, but does not actually write firmware\n\n"; + exit 0; +} + +my $ip = shift @ARGV; +$ip and $ip =~ /\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/ or usage(); + +my $probe = IO::Socket::INET->new(Proto => 'udp', + Broadcast => 1, + LocalPort => 5035) or die "socket: $!"; +my $setip = unpack("N", inet_aton($ip)); +$setip > 0 or usage(); + +my @packets; +foreach my $ver ([18, 1], [22, 2]) { + push @packets, pack("vCCVNV", 0, @$ver, 1, $setip, 0); +} +print STDERR "Looking for device: "; +my $broadcast = sockaddr_in(5035, INADDR_BROADCAST); +my $scanning; +my $box; + +$SIG{"ALRM"} = sub { + return if --$scanning <= 0; + foreach my $packet (@packets) { + $probe->send($packet, 0, $broadcast); + } + print STDERR "."; +}; + +$scanning = 15; +foreach my $packet (@packets) { + $probe->send($packet, 0, $broadcast); +} +print STDERR "."; + +while($scanning) { + my $reply; + + alarm(1); + if (my $peer = $probe->recv($reply, 16)) { + next if (length($reply) < 16); + my ($port, $addr) = sockaddr_in($peer); + my ($major, $minor1, $minor2, $code, $addr2) = unpack("vCCVV", $reply); + $addr2 = pack("N", $addr2); + if ($code == 2) { + $scanning = 0; + printf STDERR " found!\nADAM2 version $major.$minor1.$minor2 at %s (%s)\n", inet_ntoa($addr), inet_ntoa($addr2); + $box = inet_ntoa($addr); + } + } +} + +$box or die " not found!\n"; + +alarm(0); + +{ + package ADAM2FTP; + use base qw(Net::FTP); + + # ADAM2 requires upper case commands, some brain dead firewall doesn't ;-) + sub _USER { + shift->command("USER",@_)->response() + } + + sub _GETENV { + my $ftp = shift; + my ($ok, $name, $value); + + $ftp->command("GETENV",@_); + while(length($ok = $ftp->response()) < 1) { + my $line = $ftp->getline(); + unless (defined($value)) { + chomp($line); + ($name, $value) = split(/\s+/, $line, 2); + } + } + $ftp->debug_print(0, "getenv: $value\n") + if $ftp->debug(); + return $value; + } + + sub getenv { + my $ftp = shift; + my $name = shift; + return $ftp->_GETENV($name); + } + + sub _REBOOT { + shift->command("REBOOT")->response() == Net::FTP::CMD_OK + } + + sub reboot { + my $ftp = shift; + $ftp->_REBOOT; + $ftp->close; + } +} + +my $file; +my $arg; +my $noflash = 0; +my $setmtd1 = 0; +while ($arg = shift @ARGV) { + if ($arg eq "-noflash") { $noflash = 1; } + elsif ($arg eq "-setmtd1") { $setmtd1 = 1; } + else { $file = $arg; } +} + +if (!$file) { + print STDERR "No firmware file specified, exiting.\n"; + exit 0; +} + +# +# Firmware checks +# + +open FILE, "<$file" or die "can't open firmware file\n"; + +# D-Link firmware starts with "MTD4" little-endian, then has an image header at 0x90 +# OpenWRT firmware just starts with an image header at 0x00 + +my $signature; +my $sbytes = read FILE, $signature, 4; +($sbytes == 4) or die "can't read firmware signature: $!"; + +my $expectedmtd4 = "0x90010000,0x903f0000"; +my $fwtype; +my $expectedmtd1; + +if ($signature eq "4DTM") { + seek FILE, 0x90, 0 or die "can't read firmware signature: $!"; + $sbytes = read FILE, $signature, 4; + ($sbytes == 4) or die "can't read firmware signature: $!"; + if ($signature eq "\x42\xfa\xed\xfe") { + $fwtype = "D-Link (little-endian)"; + $expectedmtd1 = "0x90010090,0x90091000"; + } elsif ($signature eq "\xde\xad\xbe\x42") { + $fwtype = "D-Link (big-endian)"; + $expectedmtd1 = "0x90010090,0x90091000"; + } +} elsif ($signature eq "\x42\xfa\xed\xfe") { + $fwtype = "OpenWRT (little-endian)"; + $expectedmtd1 = "0x90010000,0x903f0000"; +} elsif ($signature eq "\xde\xad\xbe\x42") { + $fwtype = "OpenWRT (big-endian)"; + $expectedmtd1 = "0x90010000,0x903f0000"; +} + +$fwtype or die "Unknown firmware signature (are you sure that's the right firmware?)"; +print STDERR "Firmware type: $fwtype\n"; + +# +# Bootloader login +# + +print STDERR "logging into ADAM2 bootloader.. "; +my $ftp = ADAM2FTP->new($box, Debug => 0, Timeout => 600) or die "can't open control connection\n"; +$ftp->login("adam2", "adam2") or die "can't login\n"; +print STDERR "ok.\n"; + +# +# Hardware checks +# + +print STDERR "checking hardware.. "; +my $prd = $ftp->getenv("ProductID"); +my $usb = $ftp->getenv("usb_prod"); +print STDERR "$prd / $usb.\n"; +($prd eq "AR7RD" || $prd eq "AR7DB") or die "doesn't look like a DSL-502T?"; +($usb eq "DSL-502T") or die "doesn't look like a DSL-502T?"; + +# +# MTD checks and update +# + +print STDERR "checking MTD settings.. "; + +my $mtd4 = $ftp->getenv("mtd4"); +($mtd4 eq $expectedmtd4) or die "MTD4 was not as expected (should be '$expectedmtd4', was '$mtd4'). Cowardly refusing to do anything about it!"; + +# check MTD1 setting and update if needed +my $mtd1 = $ftp->getenv("mtd1"); +if ($mtd1 ne $expectedmtd1) { + die "MTD1 was not as expected (should be '$expectedmtd1', was '$mtd1'). Run with -setmtd1 to reset mtd1" unless ($setmtd1); + print STDERR "Setting mtd1.. "; + ($ftp->command("SETENV","mtd1,$expectedmtd1")->response() == Net::FTP::CMD_OK) or die "can't set mtd1"; + $file = shift @ARGV; +} + +print STDERR "ok.\n"; + +# +# Firmware size check +# + +my $fwsize = (stat(FILE))[7]; +printf STDERR "Firmware size: 0x%08x\n", $fwsize; +my $flashsize; +$mtd4 =~ /^(0x\w+),(0x\w+)$/ and $flashsize = hex($2) - hex($1); +printf STDERR "Available flash space: 0x%08x\n", $flashsize; +die "firmware is too large" if ($flashsize < $fwsize); + +# +# Flash it! +# + +if ($noflash) { + print STDERR "Not flashing firmware as -noflash was specified.\n"; + exit 0; +} + +seek FILE, 0, 0, or die "can't seek in firmware: $!"; + +print STDERR "Preparing to flash.. "; +($ftp->command("MEDIA FLSH")->response() == Net::FTP::CMD_OK) or die "can't set MEDIA FLSH"; +$ftp->binary() or die "can't set binary mode"; +print STDERR "ok.\n"; +print STDERR "Erasing flash and establishing data connection (this may take a while): "; + +my $dc = $ftp->stor("fs mtd4"); +$dc or die "can't open data connection: $!\n"; +print STDERR "ok.\n"; + +print STDERR "Writing firmware: "; +while ($fwsize > 0) { + my $buffer; + my $len = ($fwsize > 1024 ? 1024 : $fwsize); + + my $rbytes = read FILE, $buffer, $len; + ($rbytes < 0) and die "read error on firmware file: $!"; + ($rbytes == $len) or die "short read on firmware file ($rbytes < $len)"; + + my $wbytes = $dc->write($buffer, $len, 600); + ($wbytes < 0) and die "write error on FTP data connection: $!"; + ($rbytes == $wbytes) or die "short write on FTP data connection ($wbytes < $rbytes)"; + + $fwsize -= $len; + print STDERR "."; +} + +$dc->close(); +print STDERR " done.\n"; + +# +# Reboot +# + +print STDERR "Rebooting device.\n"; +$ftp->reboot(); |