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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,
'cfg' => 1,
);
GetOptions(\%opt,
'device=s',
'debug|d+',
'cfg=i',
'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();
# unbind all drivers
foreach my $cfg (@{$dev->config()}) {
foreach (@{$cfg->interfaces()}) {
my $ifnum = $_->[0]->bInterfaceNumber;
my $driver = $dev->get_driver_np($ifnum);
if ($driver) {
warn "unbinding interface $ifnum from kernel driver \"$driver\"\n";
if ($dev->detach_kernel_driver_np($ifnum) < 0) {
warn "unbinding FAILED\n";
return undef;
}
}
}
}
my $ret = $dev->set_configuration($opt{cfg});
#my ($ret, $descr) = &set_config($dev, $opt{cfg});
warn "ret=$ret\n";
sub set_config {
my ($dev, $cfg) = @_;
my $reqtype = 0x00; # USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE
my $req = 0x09; # USB_REQ_SET_CONFIGURATION
my $wValue = 0x0;
return (-1, undef) unless defined($cfg);
my $buf = 0 x 512; # pre-allocate buffer - libusb is not perl!
my $ret = $dev->control_msg($reqtype,
$req,
$cfg, # bConfigurationValue
0, # wIndex
$buf,
0, # wLength
1000); # timeout in ms
printf "usb_control_msg(0x%02x, 0x%02x, 0x%02x, 0x%04x, 0x%04x) returned $ret\n", $reqtype, $req, $cfg, 0, 0;
return ($ret, $buf);
}
sub usage {
warn <<EOT
Usage:
$0 [--debug] --device=<idVendor:idProduct> --cfg=<num>
Options:
--debug
debug output
--device
USB device ID to test - required
--cfg
new configuration value
Example:
$0 --device=1199:68a2 --cfg=2
EOT
;
exit 0;
}
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