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annotate USBLib/Windows/USB/UsbHub.cs @ 62:edc41c861d96

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Updates and cleanup in Windows USB enumeration code
author Ivo Smits <Ivo@UCIS.nl>
date Sun, 13 Oct 2013 02:47:08 +0200
parents 3424fa5a12c9
children 309c705d7460
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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.USBLib.Internal.Windows;
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7
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8 namespace UCIS.HWLib.Windows.USB {
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9 public class UsbHub : UsbDevice {
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10 public bool IsRootHub { get; private set; }
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11 internal USB_NODE_INFORMATION NodeInformation { get; private set; }
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13 public int PortCount { get { return NodeInformation.HubInformation.HubDescriptor.bNumberOfPorts; } }
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14 public bool IsBusPowered { get { return NodeInformation.HubInformation.HubIsBusPowered; } }
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15 public override string DeviceDescription { get { return IsRootHub ? "RootHub" : "Standard-USB-Hub"; } }
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17 public override string DriverKey {
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18 get {
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19 if (Parent == null) return null;
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20 using (SafeFileHandle handle = OpenHandle(Parent.DevicePath)) return GetNodeConnectionDriverKey(handle, AdapterNumber);
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21 }
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22 }
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24 internal UsbHub(UsbDevice parent, USB_NODE_CONNECTION_INFORMATION_EX nci, string devicePath, uint port, Boolean roothub)
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25 : base(parent, nci, port, devicePath) {
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26 this.IsRootHub = roothub;
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27 using (SafeFileHandle handle = OpenHandle(DevicePath)) {
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28 USB_NODE_INFORMATION NodeInfo;
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29 GetNodeInformation(handle, out NodeInfo);
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30 this.NodeInformation = NodeInfo;
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31 }
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32 }
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34 public override int GetDescriptor(byte descriptorType, byte index, short langId, byte[] buffer, int offset, int length) {
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35 if (Parent == null) return 0;
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36 using (SafeFileHandle handle = UsbHub.OpenHandle(Parent.DevicePath)) return GetDescriptor(handle, AdapterNumber, descriptorType, index, langId, buffer, offset, length);
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37 }
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40 public IList<UsbDevice> Devices {
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41 get {
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42 List<UsbDevice> devices = new List<UsbDevice>();
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43 using (SafeFileHandle handle = OpenHandle(DevicePath)) {
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44 for (uint index = 1; index <= PortCount; index++) {
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45 devices.Add(BuildDevice(this, index, this.DevicePath, handle));
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46 }
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47 }
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48 return devices;
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49 }
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50 }
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52 internal static UsbDevice BuildDevice(UsbDevice parent, uint portCount, string devicePath) {
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53 using (SafeFileHandle handle = OpenHandle(devicePath)) return BuildDevice(parent, portCount, devicePath, handle);
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54 }
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55 internal static UsbDevice BuildDevice(UsbDevice parent, uint portCount, string devicePath, SafeFileHandle handle) {
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56 USB_NODE_CONNECTION_INFORMATION_EX nodeConnection;
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57 if (!GetNodeConnectionInformation(handle, portCount, out nodeConnection)) throw new Win32Exception(Marshal.GetLastWin32Error());
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58 UsbDevice device = null;
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59 if (nodeConnection.ConnectionStatus != USB_CONNECTION_STATUS.DeviceConnected) {
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60 device = new UsbDevice(parent, nodeConnection, portCount, devicePath);
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61 } else if (nodeConnection.DeviceDescriptor.DeviceClass == (Byte)UsbDeviceClass.HubDevice) {
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62 String nodeName = GetNodeConnectionName(handle, portCount);
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63 device = new UsbHub(parent, nodeConnection, @"\\?\" + nodeName, portCount, false);
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64 } else {
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65 device = new UsbDevice(parent, nodeConnection, portCount, devicePath);
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66 }
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67 device.NodeConnectionInfo = nodeConnection;
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68 return device;
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69 }
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70 }
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71 }