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annotate USBLib/Windows/USB/UsbController.cs @ 63:309c705d7460

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Updates and cleanup in Windows USB enumeration code
author Ivo Smits <Ivo@UCIS.nl>
date Sun, 13 Oct 2013 18:43:45 +0200
parents edc41c861d96
children
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1 using System;
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2 using System.Collections.Generic;
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3 using System.ComponentModel;
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4 using System.Runtime.InteropServices;
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5 using Microsoft.Win32.SafeHandles;
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6 using UCIS.HWLib.Windows.Devices;
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7 using UCIS.USBLib.Internal.Windows;
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9 namespace UCIS.HWLib.Windows.USB {
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10 public class UsbController {
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11 public String DevicePath { get; private set; }
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12 public DeviceNode DeviceNode { get; private set; }
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13 public String DeviceDescription { get { return DeviceNode.DeviceDescription; } }
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14 public String DriverKey { get { return DeviceNode.DriverKey; } }
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15 public UsbHub RootHub {
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16 get {
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17 USB_ROOT_HUB_NAME rootHubName = new USB_ROOT_HUB_NAME();
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18 int nBytesReturned;
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19 using (SafeFileHandle handle = UsbHub.OpenHandle(DevicePath))
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20 if (!Kernel32.DeviceIoControl(handle, UsbApi.IOCTL_USB_GET_ROOT_HUB_NAME, IntPtr.Zero, 0, out rootHubName, Marshal.SizeOf(rootHubName), out nBytesReturned, IntPtr.Zero))
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21 throw new Win32Exception(Marshal.GetLastWin32Error());
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22 if (rootHubName.ActualLength <= 0) return null;
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23 return new UsbHub(null, @"\\?\" + rootHubName.RootHubName, 0);
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24 }
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25 }
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26 private UsbController(DeviceNode di, String devicePath) {
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27 this.DeviceNode = di;
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28 this.DevicePath = devicePath;
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29 }
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31 static readonly Guid IID_DEVINTERFACE_USB_HOST_CONTROLLER = new Guid(UsbApi.GUID_DEVINTERFACE_USB_HOST_CONTROLLER);
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32 public static UsbController GetControllerForDeviceNode(DeviceNode node) {
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33 if (node == null) return null;
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34 String[] interfaces = node.GetInterfaces(IID_DEVINTERFACE_USB_HOST_CONTROLLER);
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35 if (interfaces == null || interfaces.Length == 0) return null;
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36 return new UsbController(node, interfaces[0]);
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37 }
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39 public static IList<UsbController> GetControllers() {
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40 IList<UsbController> devices = new List<UsbController>();
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41 foreach (DeviceNode dev in DeviceNode.GetDevices(IID_DEVINTERFACE_USB_HOST_CONTROLLER)) {
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42 UsbController controller = GetControllerForDeviceNode(dev);
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43 if (controller != null) devices.Add(controller);
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44 }
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45 return devices;
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46 }
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47 }
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48 }