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