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#!/usr/bin/perl
# Copyright 2012 Bjørn Mork <bjorn@mork.no>
# License: GPLv2
use strict;
use warnings;
use Getopt::Long;
use Device::USB;
use Data::Dumper;
# defaults
my %opt = (
'debug' => 0,
);
GetOptions(\%opt,
'device=s',
'debug|d+',
'help|h|?',
);
&usage if ($opt{'help'} || !$opt{'device'});
my $usb = Device::USB->new();
$usb->debug_mode($opt{'debug'});
my ($vid, $pid) = map { hex } split(/:/, $opt{'device'});
my $dev = $usb->find_device($vid, $pid);
die "Cannot find any such device: $opt{'device'} - $!\n" unless $dev;
warn "Device: ", sprintf("%04x:%04x", $dev->idVendor(), $dev->idProduct()), "\n";
$dev->open();
my $mscode = 0;
foreach my $idx (@ARGV) {
if ($idx =~ s/^0x// || $idx =~ /[a-f]/i) {
$idx = hex($idx);
}
my $result = $dev->get_string_simple($idx);
printf "%#04x: %s", $idx, $result || '(none)';
# MS special thingy - string is converted from utf16le to single bytes,so ignore padding byte
if ($idx = 0xee && $result && $result =~ /^MSFT100(.)$/) {
$mscode = unpack("C", $1);
printf ", code=%#04x (%d)", $mscode, $mscode;
}
map { printf " %02x", $_ } unpack("C*", $result) if ($opt{debug} && $result);
print "\n";
}
my ($ret, $descr) = &get_ms_descriptor($dev, $mscode, 0x0001);
($ret, $descr) = &get_ms_descriptor($dev, $mscode, 0x0004);
if ($ret > 0) {
print "MS descriptor:\n";
map { printf " %02x", $_ } unpack("C*", $descr);
print "\n";
# decoding header:
my ($dwLength, $bcdVersion, $wIndex, $bCount) = unpack("VvvC", $descr);
printf "dwLength=$dwLength, bcdVersion=%04x, wIndex=$wIndex, bCount=$bCount\n", $bcdVersion;
$descr = substr($descr, 16);
# decode each function
for (my $i = 0; $i < $bCount; $i++) {
my ($bFirstInterfaceNumber, $bInterfaceCount, $compatibleID, $subCompatibleID) = unpack("CCQQ", $descr);
printf "bFirstInterfaceNumber=$bFirstInterfaceNumber, bInterfaceCount=$bInterfaceCount, compatibleID=%#010x, subCompatibleID=%#010x\n", $compatibleID, $subCompatibleID;
print "compatibleID: ", substr($descr, 2, 8), ", subCompatibleID: ", substr($descr, 10, 8), "\n";
$descr = substr($descr, 24);
}
}
# try to get the extended properties as well
($ret, $descr) = &get_ms_descriptor($dev, $mscode, 0x0005);
if ($ret > 0) {
print "MS extended properties:\n";
map { printf " %02x", $_ } unpack("C*", $descr);
print "\n";
# decoding header:
my ($dwLength, $bcdVersion, $wIndex, $wCount) = unpack("Vvvv", $descr);
printf "dwLength=$dwLength, bcdVersion=%04x, wIndex=$wIndex, wCount=$wCount\n", $bcdVersion;
$descr = substr($descr, 10);
}
# retrieve the first MS descriptor page, referencing interface 0
sub get_ms_descriptor {
my ($dev, $mscode, $feature) = @_;
my $reqtype = 0xc0; # USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE
my $wValue = 0x0;
return (-1, undef) unless $mscode;
# some requests got to the interface...
if ($feature > 0x0004) {
$reqtype = 0xc1; # USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE
$wValue = 1;
}
my $buf = 0 x 512; # pre-allocate buffer - libusb is not perl!
my $ret = $dev->control_msg($reqtype,
$mscode,
$wValue, # wValue = if #0 << 8 | page #0
$feature, # wIndex = feature
$buf,
512,
1000); # timeout in ms
printf "usb_control_msg(%#04x, %#04x, %#06x, %#06x) returned $ret\n", $reqtype, $mscode, $wValue, $feature;
return ($ret, $buf);
}
sub usage {
warn <<EOT
Usage:
$0 [--debug] --device=<idVendor:idProduct> <list of string descriptor indexes>
Options:
--debug
debug output
--device
USB device ID to test - required
Example:
$0 --device=1199:68a2 1 2 3 0xee
EOT
;
exit 0;
}
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