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// Copyright 2013 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package usb
/*
#ifndef OS_WINDOWS
#include "os/threads_posix.h"
#endif
#include "libusbi.h"
#include "libusb.h"
*/
import "C"
type Descriptor struct {
// Bus information
Bus uint8 // The bus on which the device was detected
Address uint8 // The address of the device on the bus
// Version information
Spec BCD // USB Specification Release Number
Device BCD // The device version
// Product information
Vendor ID // The Vendor identifer
Product ID // The Product identifier
// Protocol information
Class uint8 // The class of this device
SubClass uint8 // The sub-class (within the class) of this device
Protocol uint8 // The protocol (within the sub-class) of this device
// Configuration information
Configs []ConfigInfo
}
func newDescriptor(dev *C.libusb_device) (*Descriptor, error) {
var desc C.struct_libusb_device_descriptor
if errno := C.libusb_get_device_descriptor(dev, &desc); errno < 0 {
return nil, usbError(errno)
}
// Enumerate configurations
var cfgs []ConfigInfo
for i := 0; i < int(desc.bNumConfigurations); i++ {
var cfg *C.struct_libusb_config_descriptor
if errno := C.libusb_get_config_descriptor(dev, C.uint8_t(i), &cfg); errno < 0 {
return nil, usbError(errno)
}
cfgs = append(cfgs, newConfig(dev, cfg))
C.libusb_free_config_descriptor(cfg)
}
return &Descriptor{
Bus: uint8(C.libusb_get_bus_number(dev)),
Address: uint8(C.libusb_get_device_address(dev)),
Spec: BCD(desc.bcdUSB),
Device: BCD(desc.bcdDevice),
Vendor: ID(desc.idVendor),
Product: ID(desc.idProduct),
Class: uint8(desc.bDeviceClass),
SubClass: uint8(desc.bDeviceSubClass),
Protocol: uint8(desc.bDeviceProtocol),
Configs: cfgs,
}, nil
}
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