Mercurial > hg > ucis.core

annotate USBLib/Windows/USB/UsbDevice.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 2b24666cd759
children 309c705d7460
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1 using System;
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2 using System.ComponentModel;
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3 using System.Runtime.InteropServices;
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4 using Microsoft.Win32.SafeHandles;
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5 using UCIS.HWLib.Windows.Devices;
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6 using UCIS.USBLib.Communication;
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7 using UCIS.USBLib.Descriptor;
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8 using UCIS.USBLib.Internal.Windows;
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9
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10 namespace UCIS.HWLib.Windows.USB {
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11 public class UsbDevice : IUsbDevice, IUsbInterface {
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12 protected internal static SafeFileHandle OpenHandle(String path) {
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13 SafeFileHandle handle = Kernel32.CreateFile(path, Kernel32.GENERIC_WRITE, Kernel32.FILE_SHARE_WRITE, IntPtr.Zero, Kernel32.OPEN_EXISTING, 0, IntPtr.Zero);
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14 if (handle.IsInvalid) throw new Win32Exception(Marshal.GetLastWin32Error());
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15 return handle;
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16 }
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17 internal static Boolean GetNodeInformation(SafeFileHandle handle, out USB_NODE_INFORMATION nodeInfo) {
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18 nodeInfo = new USB_NODE_INFORMATION();
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19 int nBytes = Marshal.SizeOf(typeof(USB_NODE_INFORMATION));
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20 return Kernel32.DeviceIoControl(handle, UsbApi.IOCTL_USB_GET_NODE_INFORMATION, ref nodeInfo, nBytes, out nodeInfo, nBytes, out nBytes, IntPtr.Zero);
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21 }
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22 internal static Boolean GetNodeConnectionInformation(SafeFileHandle handle, UInt32 port, out USB_NODE_CONNECTION_INFORMATION_EX nodeConnection) {
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23 int nBytes = Marshal.SizeOf(typeof(USB_NODE_CONNECTION_INFORMATION_EX));
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24 nodeConnection = new USB_NODE_CONNECTION_INFORMATION_EX();
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25 nodeConnection.ConnectionIndex = port;
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26 if (!Kernel32.DeviceIoControl(handle, UsbApi.IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX, ref nodeConnection, nBytes, out nodeConnection, nBytes, out nBytes, IntPtr.Zero))
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27 throw new Win32Exception(Marshal.GetLastWin32Error());
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28 return true;
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29 }
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30 protected static String GetNodeConnectionName(SafeFileHandle handle, UInt32 port) {
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31 int nBytes = Marshal.SizeOf(typeof(USB_NODE_CONNECTION_NAME));
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32 USB_NODE_CONNECTION_NAME nameConnection = new USB_NODE_CONNECTION_NAME();
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33 nameConnection.ConnectionIndex = port;
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34 if (!Kernel32.DeviceIoControl(handle, UsbApi.IOCTL_USB_GET_NODE_CONNECTION_NAME, ref nameConnection, nBytes, out nameConnection, nBytes, out nBytes, IntPtr.Zero))
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35 throw new Win32Exception(Marshal.GetLastWin32Error());
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36 return nameConnection.NodeName;
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37 }
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38 protected unsafe static int GetDescriptor(SafeFileHandle handle, UInt32 port, byte descriptorType, byte index, short langId, byte[] buffer, int offset, int length) {
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39 int szRequest = Marshal.SizeOf(typeof(USB_DESCRIPTOR_REQUEST));
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40 USB_DESCRIPTOR_REQUEST request = new USB_DESCRIPTOR_REQUEST();
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41 request.ConnectionIndex = port;
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42 request.SetupPacket.Value = (short)((descriptorType << 8) + index);
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43 request.SetupPacket.Index = (short)langId;
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44 request.SetupPacket.Length = (short)length;
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45 int nBytes = length + szRequest;
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46 Byte[] bigbuffer = new Byte[nBytes];
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47 if (!Kernel32.DeviceIoControl(handle, UsbApi.IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, ref request, Marshal.SizeOf(typeof(USB_DESCRIPTOR_REQUEST)), bigbuffer, nBytes, out nBytes, IntPtr.Zero)) {
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48 int err = Marshal.GetLastWin32Error();
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49 if (err != 2 && err != 31 && err != 87) throw new Win32Exception(err);
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50 return 0;
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51 }
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52 nBytes -= szRequest;
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53 if (nBytes > length) nBytes = length;
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54 if (nBytes < 0) return 0;
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55 if (nBytes > 0) Buffer.BlockCopy(bigbuffer, szRequest, buffer, offset, nBytes);
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56 return nBytes;
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57 }
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58 protected internal unsafe static String GetRootHubName(SafeFileHandle handle) {
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59 USB_ROOT_HUB_NAME rootHubName = new USB_ROOT_HUB_NAME();
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60 int nBytesReturned;
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61 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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62 throw new Win32Exception(Marshal.GetLastWin32Error());
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63 if (rootHubName.ActualLength <= 0) return null;
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64 return rootHubName.RootHubName;
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65 }
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66 protected unsafe static String GetNodeConnectionDriverKey(SafeFileHandle handle, UInt32 port) {
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67 USB_NODE_CONNECTION_DRIVERKEY_NAME DriverKeyStruct = new USB_NODE_CONNECTION_DRIVERKEY_NAME();
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68 int nBytes = Marshal.SizeOf(DriverKeyStruct);
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69 DriverKeyStruct.ConnectionIndex = port;
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70 if (!Kernel32.DeviceIoControl(handle, UsbApi.IOCTL_USB_GET_NODE_CONNECTION_DRIVERKEY_NAME, ref DriverKeyStruct, nBytes, out DriverKeyStruct, nBytes, out nBytes, IntPtr.Zero))
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71 return null;
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72 return DriverKeyStruct.DriverKeyName;
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73 }
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74
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75 public UsbDevice Parent { get; protected set; }
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76 public String DevicePath { get; private set; }
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77 public UInt32 AdapterNumber { get; private set; }
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78 internal USB_NODE_CONNECTION_INFORMATION_EX NodeConnectionInfo { get; set; }
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79 public UsbDeviceDescriptor DeviceDescriptor { get { return NodeConnectionInfo.DeviceDescriptor; } }
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80
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81 public bool IsHub { get { return NodeConnectionInfo.DeviceIsHub != 0; } }
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82 public bool IsConnected { get { return NodeConnectionInfo.ConnectionStatus == USB_CONNECTION_STATUS.DeviceConnected; } }
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83 public string Status { get { return NodeConnectionInfo.ConnectionStatus.ToString(); } }
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84 public string Speed { get { return NodeConnectionInfo.Speed.ToString(); } }
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85 public Byte CurrentConfigurationValue { get { return NodeConnectionInfo.CurrentConfigurationValue; } }
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86 public UInt16 DeviceAddress { get { return NodeConnectionInfo.DeviceAddress; } }
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87 public UInt32 NumberOfOpenPipes { get { return NodeConnectionInfo.NumberOfOpenPipes; } }
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88
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89 SafeFileHandle OpenHandle() {
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90 return OpenHandle(DevicePath);
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91 }
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92
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93 public int NumConfigurations { get { return DeviceDescriptor.NumConfigurations; } }
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94 public int VendorID { get { return DeviceDescriptor.VendorID; } }
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95 public int ProductID { get { return DeviceDescriptor.ProductID; } }
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96
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97 private String GetStringSafe(Byte id) {
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98 if (id == 0) return null;
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99 String s = GetStringDescriptor(id);
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100 if (s == null) return s;
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101 return s.Trim(' ', '\0');
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102 }
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103
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104 public string Manufacturer { get { return GetStringSafe(DeviceDescriptor.ManufacturerStringID); } }
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105 public string Product { get { return GetStringSafe(DeviceDescriptor.ProductStringID); } }
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106 public string SerialNumber { get { return GetStringSafe(DeviceDescriptor.SerialNumberStringID); } }
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107 public virtual string DriverKey { get { using (SafeFileHandle handle = OpenHandle(DevicePath)) return UsbHub.GetNodeConnectionDriverKey(handle, AdapterNumber); } }
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108
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109 public virtual string DeviceDescription { get { return DeviceNode == null ? null : DeviceNode.DeviceDescription; } }
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110 public string DeviceID { get { return DeviceNode == null ? null : DeviceNode.DeviceID; } }
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111
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112 private DeviceNode mDeviceNode;
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113 public DeviceNode DeviceNode {
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114 get {
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115 String dk = DriverKey;
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116 if (mDeviceNode == null && dk != null) {
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117 foreach (DeviceNode node in DeviceNode.GetDevices("USB")) {
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118 if (dk.Equals(node.DriverKey, StringComparison.InvariantCultureIgnoreCase)) {
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119 mDeviceNode = node;
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120 break;
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121 }
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122 }
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123 }
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124 return mDeviceNode;
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125 }
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126 }
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127
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128 internal UsbDevice(UsbDevice parent, USB_NODE_CONNECTION_INFORMATION_EX nci, uint port, string devicePath) {
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129 this.Parent = parent;
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130 this.NodeConnectionInfo = nci;
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131 this.DevicePath = devicePath;
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132 this.AdapterNumber = port;
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133 if (devicePath == null) return;
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134 }
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135
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136 private String GetStringDescriptor(Byte index) {
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137 return UsbStringDescriptor.GetStringFromDevice(this, index, 0); //0x409
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138 }
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139
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140 static UsbDevice GetUsbDevice(DeviceNode node, out Boolean isHostController) {
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141 UsbController controller = UsbController.GetControllerForDeviceNode(node);
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142 if (controller != null) {
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143 isHostController = true;
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144 return controller.RootHub;
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145 }
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146 isHostController = false;
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147 DeviceNode parent = node.GetParent();
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148 if (parent == null) return null;
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149 Boolean isHostControllerA;
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150 UsbDevice usbdev = GetUsbDevice(parent, out isHostControllerA);
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151 if (isHostControllerA) return usbdev;
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152 UsbHub usbhub = usbdev as UsbHub;
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153 if (usbhub == null) {
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154 if (parent.Service == "usbccgp") return usbdev;
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155 return null;
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156 }
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157 String driverkey = node.DriverKey;
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158 if (driverkey == null) return null;
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159 foreach (UsbDevice child in usbhub.Devices) {
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160 if (driverkey.Equals(child.DriverKey, StringComparison.InvariantCultureIgnoreCase)) return child;
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161 }
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162 return null;
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163 }
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164 public static UsbDevice GetUsbDevice(DeviceNode node) {
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165 Boolean isHostController;
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166 return GetUsbDevice(node, out isHostController);
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167 }
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168
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169 #region IUsbInterface Members
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170 byte IUsbInterface.Configuration { get { throw new NotImplementedException(); } }
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171 void IUsbInterface.Close() { }
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172 public virtual int GetDescriptor(byte descriptorType, byte index, short langId, byte[] buffer, int offset, int length) {
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173 using (SafeFileHandle handle = UsbHub.OpenHandle(DevicePath)) return UsbHub.GetDescriptor(handle, AdapterNumber, descriptorType, index, langId, buffer, offset, length);
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174 }
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175 string IUsbInterface.GetString(short langId, byte stringIndex) {
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176 return UsbStringDescriptor.GetStringFromDevice(this, stringIndex, langId);
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177 }
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178 int IUsbInterface.BulkWrite(byte endpoint, byte[] buffer, int offset, int length) { throw new NotImplementedException(); }
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179 int IUsbInterface.BulkRead(byte endpoint, byte[] buffer, int offset, int length) { throw new NotImplementedException(); }
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180 void IUsbInterface.BulkReset(byte endpoint) { throw new NotImplementedException(); }
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181 int IUsbInterface.InterruptWrite(byte endpoint, byte[] buffer, int offset, int length) { throw new NotImplementedException(); }
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182 int IUsbInterface.InterruptRead(byte endpoint, byte[] buffer, int offset, int length) { throw new NotImplementedException(); }
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183 void IUsbInterface.InterruptReset(byte endpoint) { throw new NotImplementedException(); }
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184 int IUsbInterface.ControlWrite(UsbControlRequestType requestType, byte request, short value, short index, byte[] buffer, int offset, int length) { throw new NotImplementedException(); }
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185 int IUsbInterface.ControlRead(UsbControlRequestType requestType, byte request, short value, short index, byte[] buffer, int offset, int length) { throw new NotImplementedException(); }
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186 UsbPipeStream IUsbInterface.GetBulkStream(byte endpoint) { throw new NotImplementedException(); }
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187 UsbPipeStream IUsbInterface.GetInterruptStream(byte endpoint) { throw new NotImplementedException(); }
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188 void IDisposable.Dispose() { }
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189 #endregion
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190 #region IUsbDevice Members
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191 byte IUsbDevice.Configuration { get { throw new NotSupportedException(); } set { throw new NotSupportedException(); } }
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192 void IUsbDevice.ClaimInterface(int interfaceID) { }
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193 void IUsbDevice.ReleaseInterface(int interfaceID) { }
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194 void IUsbDevice.ResetDevice() { throw new NotSupportedException(); }
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195 IUsbDeviceRegistry IUsbDevice.Registry { get { throw new NotImplementedException(); } }
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196 #endregion
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197 }
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198 }