Mercurial > hg > ucis.core

annotate USBLib/Windows/USB/UsbDevice.cs @ 87:9b898d8b2541

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Small improvements in Windows USB device handling
author Ivo Smits <Ivo@UCIS.nl>
date Thu, 05 Jun 2014 00:46:15 +0200
parents e811297f5aa4
children
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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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10 namespace UCIS.HWLib.Windows.USB {
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11 public class UsbDevice : IUsbDevice, IUsbInterface {
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12 internal static USB_NODE_CONNECTION_INFORMATION_EX GetNodeConnectionInformation(SafeFileHandle handle, UInt32 port) {
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13 int nBytes = Marshal.SizeOf(typeof(USB_NODE_CONNECTION_INFORMATION_EX));
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14 USB_NODE_CONNECTION_INFORMATION_EX nodeConnection = new USB_NODE_CONNECTION_INFORMATION_EX();
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15 nodeConnection.ConnectionIndex = port;
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16 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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17 throw new Win32Exception(Marshal.GetLastWin32Error());
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18 return nodeConnection;
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19 }
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21 private Boolean HasNodeConnectionInfo = false;
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22 private USB_NODE_CONNECTION_INFORMATION_EX NodeConnectionInfo;
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24 private void GetNodeConnectionInfo() {
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25 if (HasNodeConnectionInfo) return;
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26 if (Parent == null) {
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27 HasNodeConnectionInfo = true;
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28 return;
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29 }
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30 using (SafeFileHandle handle = Parent.OpenHandle()) NodeConnectionInfo = GetNodeConnectionInformation(handle, AdapterNumber);
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31 HasNodeConnectionInfo = true;
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32 }
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33 internal void SetNodeConnectionInfo(USB_NODE_CONNECTION_INFORMATION_EX nci) {
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34 NodeConnectionInfo = nci;
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35 HasNodeConnectionInfo = true;
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36 }
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37
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38 public UsbDeviceDescriptor DeviceDescriptor { get { GetNodeConnectionInfo(); return NodeConnectionInfo.DeviceDescriptor; } }
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39
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40 public bool IsHub { get { GetNodeConnectionInfo(); return NodeConnectionInfo.DeviceIsHub != 0; } }
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41 public bool IsConnected { get { GetNodeConnectionInfo(); return NodeConnectionInfo.ConnectionStatus == USB_CONNECTION_STATUS.DeviceConnected; } }
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42 public string Status { get { GetNodeConnectionInfo(); return NodeConnectionInfo.ConnectionStatus.ToString(); } }
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43 public string Speed { get { GetNodeConnectionInfo(); return NodeConnectionInfo.Speed.ToString(); } }
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44 public Byte CurrentConfigurationValue { get { GetNodeConnectionInfo(); return NodeConnectionInfo.CurrentConfigurationValue; } }
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45 public UInt16 DeviceAddress { get { GetNodeConnectionInfo(); return NodeConnectionInfo.DeviceAddress; } }
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46 public UInt32 NumberOfOpenPipes { get { GetNodeConnectionInfo(); return NodeConnectionInfo.NumberOfOpenPipes; } }
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48 public int NumConfigurations { get { return DeviceDescriptor.NumConfigurations; } }
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49 public int VendorID { get { return DeviceDescriptor.VendorID; } }
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50 public int ProductID { get { return DeviceDescriptor.ProductID; } }
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52 private short[] languages = null;
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53
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54 private String GetStringSafe(Byte id) {
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55 if (id == 0) return null;
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56 if (languages == null) {
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57 Byte[] buff = new Byte[256];
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58 int len = GetDescriptor((Byte)UsbDescriptorType.String, 0, 0, buff, 0, buff.Length);
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59 if (len > 1) {
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60 languages = new short[len / 2 - 1];
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61 for (int i = 0; i < languages.Length; i++) languages[i] = BitConverter.ToInt16(buff, i * 2 + 2);
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62 }
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63 }
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64 short language = (languages == null || languages.Length == 0) ? (short)0 : languages[0];
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65 String s = UsbStringDescriptor.GetStringFromDevice(this, id, language);
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66 if (s == null) return s;
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67 return s.Trim(' ', '\0');
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68 }
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70 public string Manufacturer { get { return GetStringSafe(DeviceDescriptor.ManufacturerStringID); } }
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71 public string Product { get { return GetStringSafe(DeviceDescriptor.ProductStringID); } }
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72 public string SerialNumber { get { return GetStringSafe(DeviceDescriptor.SerialNumberStringID); } }
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73 public String DriverKey {
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74 get {
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75 if (mParent != null) {
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76 using (SafeFileHandle handle = mParent.OpenHandle()) {
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77 USB_NODE_CONNECTION_DRIVERKEY_NAME DriverKeyStruct = new USB_NODE_CONNECTION_DRIVERKEY_NAME();
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78 int nBytes = Marshal.SizeOf(DriverKeyStruct);
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79 DriverKeyStruct.ConnectionIndex = AdapterNumber;
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80 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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81 return null;
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82 return DriverKeyStruct.DriverKeyName;
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83 }
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84 }
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85 if (mDeviceNode != null) return mDeviceNode.DriverKey;
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86 return null;
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87 }
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88 }
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90 public virtual string DeviceDescription { get { return DeviceNode == null ? null : DeviceNode.DeviceDescription; } }
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91 public string DeviceID { get { return DeviceNode == null ? null : DeviceNode.DeviceID; } }
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93 protected DeviceNode mDeviceNode = null;
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94 public DeviceNode DeviceNode {
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95 get {
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96 String dk = DriverKey;
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97 if (mDeviceNode == null && dk != null) {
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98 foreach (DeviceNode node in DeviceNode.GetDevices("USB")) {
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99 if (dk.Equals(node.DriverKey, StringComparison.InvariantCultureIgnoreCase)) {
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100 mDeviceNode = node;
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101 break;
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102 }
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103 }
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104 }
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105 return mDeviceNode;
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106 }
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107 }
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108 protected UsbHub mParent = null;
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109 private UInt32 mAdapterNumber = 0;
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110 private UsbHub GetParent() {
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111 if (mParent == null && mDeviceNode != null) {
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112 mParent = UsbHub.GetHubForDeviceNode(mDeviceNode.GetParent());
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113 if (mParent != null) {
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114 UsbDevice self = mParent.FindChildForDeviceNode(mDeviceNode);
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115 if (self != null) mAdapterNumber = self.AdapterNumber;
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116 }
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117 }
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118 return mParent;
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119 }
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120 public UsbHub Parent { get { return GetParent(); } }
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121 public UInt32 AdapterNumber { get { GetParent(); return mAdapterNumber; } }
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122
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123 internal UsbDevice(DeviceNode devnode, UsbHub parent, uint port) {
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124 this.mDeviceNode = devnode;
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125 this.mParent = parent;
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126 this.mAdapterNumber = port;
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127 }
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128
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129 public static UsbDevice GetUsbDevice(DeviceNode node) {
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130 if (node == null) return null;
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131 //UsbController controller = UsbController.GetControllerForDeviceNode(node);
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132 //if (controller != null) return controller;
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133 UsbHub hub = UsbHub.GetHubForDeviceNode(node);
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134 if (hub != null) return hub;
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135 DeviceNode parent = node.GetParent();
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136 if (parent == null) return null;
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137 if (parent.Service == "usbccgp") return GetUsbDevice(parent);
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138 hub = UsbHub.GetHubForDeviceNode(parent);
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139 if (hub == null) return null;
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140 return hub.FindChildForDeviceNode(node);
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141 }
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142
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143 #region IUsbInterface and IUsbDevice Members
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144 public int GetDescriptor(byte descriptorType, byte index, short langId, byte[] buffer, int offset, int length) {
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145 using (SafeFileHandle handle = Parent.OpenHandle()) {
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146 int szRequest = Marshal.SizeOf(typeof(USB_DESCRIPTOR_REQUEST));
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147 USB_DESCRIPTOR_REQUEST request = new USB_DESCRIPTOR_REQUEST();
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148 request.ConnectionIndex = AdapterNumber;
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149 request.SetupPacket.Value = (short)((descriptorType << 8) + index);
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150 request.SetupPacket.Index = (short)langId;
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151 request.SetupPacket.Length = (short)length;
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152 int nBytes = length + szRequest;
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153 Byte[] bigbuffer = new Byte[nBytes];
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154 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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155 if (descriptorType == (Byte)UsbDescriptorType.Device && index == 0 && langId == 0) {
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156 Byte[] descbytes = DeviceDescriptor.GetBytes();
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157 length = Math.Min(descbytes.Length, length);
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158 Array.Copy(descbytes, 0, buffer, 0, length);
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159 return length;
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160 }
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161 int err = Marshal.GetLastWin32Error();
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162 if (err != 31) throw new Win32Exception(err);
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163 return 0;
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164 }
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165 nBytes -= szRequest;
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166 if (nBytes > length) nBytes = length;
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167 if (nBytes < 0) return 0;
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168 if (nBytes > 0) Buffer.BlockCopy(bigbuffer, szRequest, buffer, offset, nBytes);
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169 return nBytes;
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170 }
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171 }
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172 byte IUsbInterface.Configuration { get { return CurrentConfigurationValue; } }
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173 byte IUsbDevice.Configuration { get { return CurrentConfigurationValue; } set { throw new NotSupportedException(); } }
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174 void IUsbDevice.ResetDevice() { throw new NotImplementedException(); }
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175 IUsbDeviceRegistry IUsbDevice.Registry { get { throw new NotImplementedException(); } }
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176 void IUsbInterface.Close() { }
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177 int IUsbInterface.PipeTransfer(byte endpoint, byte[] buffer, int offset, int length) { throw new NotSupportedException(); }
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178 void IUsbInterface.PipeReset(byte endpoint) { throw new NotImplementedException(); }
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179 void IUsbInterface.PipeAbort(byte endpoint) { throw new NotImplementedException(); }
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180 int IUsbInterface.ControlTransfer(UsbControlRequestType requestType, byte request, short value, short index, byte[] buffer, int offset, int length) { throw new NotSupportedException(); }
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181 UsbPipeStream IUsbInterface.GetPipeStream(byte endpoint) { throw new NotSupportedException(); }
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182 void IDisposable.Dispose() { }
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183 void IUsbDevice.ClaimInterface(int interfaceID) { }
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184 void IUsbDevice.ReleaseInterface(int interfaceID) { }
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185 #endregion
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186 }
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187 }