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1 /* |
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2 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Usb observer implementation for fmtx watcher plugin. |
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15 * |
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16 */ |
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17 |
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18 |
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19 #include "hwrmfmtxusbobserver.h" |
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20 #include "trace.h" |
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21 |
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22 // bitmask for requesting notification of every USB device state change |
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23 const TUint KUsbAllStates = 0xFFFFFFFF; |
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24 |
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25 // ============================ LOCAL FUNCTIONS =============================== |
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26 |
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27 // ----------------------------------------------------------------------------- |
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28 // UsbConnected() |
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29 // ----------------------------------------------------------------------------- |
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30 // |
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31 static TBool UsbConnected( TUsbDeviceState aDeviceState ) |
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32 { |
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33 INFO_LOG1( "UsbConnected - %d", aDeviceState); |
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34 |
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35 if ( aDeviceState == EUsbDeviceStateAttached || aDeviceState == EUsbDeviceStatePowered || |
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36 aDeviceState == EUsbDeviceStateUndefined) |
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37 { |
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38 RDebug::Print(_L("return false ")); |
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39 return EFalse; |
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40 } |
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41 else |
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42 { |
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43 RDebug::Print(_L("return true ")); |
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44 return ETrue; |
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45 } |
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46 } |
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47 |
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48 // ============================ MEMBER FUNCTIONS =============================== |
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49 |
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50 // ----------------------------------------------------------------------------- |
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51 // CHWRMFmtxUsbObserver::NewL() |
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52 // ----------------------------------------------------------------------------- |
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53 // |
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54 CHWRMFmtxUsbObserver* CHWRMFmtxUsbObserver::NewL( MHWRMFmtxConnObserverCallback& aObserver ) |
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55 { |
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56 FUNC_LOG; |
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57 |
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58 CHWRMFmtxUsbObserver* self = new( ELeave ) CHWRMFmtxUsbObserver( aObserver ); |
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59 CleanupStack::PushL( self ); |
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60 self->ConstructL(); |
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61 CleanupStack::Pop( self ); |
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62 return self; |
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63 } |
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64 |
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65 // ----------------------------------------------------------------------------- |
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66 // CHWRMFmtxUsbObserver::~CHWRMFmtxUsbObserver() |
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67 // ----------------------------------------------------------------------------- |
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68 // |
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69 CHWRMFmtxUsbObserver::~CHWRMFmtxUsbObserver() |
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70 { |
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71 FUNC_LOG; |
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72 |
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73 Cancel(); |
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74 iUsbMan.Close(); |
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75 } |
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76 |
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77 // ----------------------------------------------------------------------------- |
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78 // CHWRMFmtxUsbObserver::GetStatusL |
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79 // ----------------------------------------------------------------------------- |
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80 // |
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81 TBool CHWRMFmtxUsbObserver::GetStatusL() |
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82 { |
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83 FUNC_LOG; |
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84 |
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85 TUsbDeviceState deviceState; |
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86 TInt err( iUsbMan.GetDeviceState( deviceState ) ); |
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87 |
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88 LOG_IF_ERROR2( err, "CHWRMFmtxUsbObserver::StartObservingL - err %d, state %d", err, deviceState ); |
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89 |
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90 User::LeaveIfError( err ); |
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91 |
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92 return UsbConnected( deviceState ); |
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93 } |
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94 |
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95 |
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96 // ----------------------------------------------------------------------------- |
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97 // CHWRMFmtxUsbObserver::StartObservingL |
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98 // ----------------------------------------------------------------------------- |
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99 // |
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100 void CHWRMFmtxUsbObserver::StartObservingL() |
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101 { |
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102 FUNC_LOG; |
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103 |
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104 if( !IsActive() ) |
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105 { |
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106 OrderUsbNotification(); |
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107 |
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108 // check the initial status, so that only state change is notified |
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109 iConnected = GetStatusL(); |
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110 } |
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111 } |
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112 |
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113 // ----------------------------------------------------------------------------- |
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114 // CHWRMFmtxUsbObserver::StopObserving |
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115 // ----------------------------------------------------------------------------- |
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116 // |
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117 void CHWRMFmtxUsbObserver::StopObserving() |
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118 { |
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119 FUNC_LOG; |
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120 |
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121 Cancel(); |
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122 } |
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123 |
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124 // ----------------------------------------------------------------------------- |
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125 // CHWRMFmtxUsbObserver::CHWRMFmtxUsbObserver() |
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126 // ----------------------------------------------------------------------------- |
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127 // |
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128 CHWRMFmtxUsbObserver::CHWRMFmtxUsbObserver( MHWRMFmtxConnObserverCallback& aObserver ) : |
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129 CActive( EPriorityStandard ), |
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130 iDeviceState( EUsbDeviceStateUndefined ), |
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131 iCallback( aObserver ), |
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132 iConnected( ETrue ) |
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133 { |
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134 FUNC_LOG; |
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135 |
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136 CActiveScheduler::Add( this ); |
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137 } |
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138 |
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139 // ----------------------------------------------------------------------------- |
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140 // CHWRMFmtxUsbObserver::ConstructL |
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141 // ----------------------------------------------------------------------------- |
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142 // |
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143 void CHWRMFmtxUsbObserver::ConstructL() |
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144 { |
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145 FUNC_LOG; |
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146 |
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147 // Connect to usbman |
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148 TInt err = iUsbMan.Connect(); |
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149 |
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150 LOG_IF_ERROR1( err, "CHWRMFmtxUsbObserver::ConstructL - err %d", err ); |
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151 |
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152 User::LeaveIfError( err ); |
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153 } |
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154 |
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155 // ----------------------------------------------------------------------------- |
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156 // CHWRMFmtxUsbObserver::OrderUsbNotification() |
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157 // ----------------------------------------------------------------------------- |
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158 // |
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159 void CHWRMFmtxUsbObserver::OrderUsbNotification() |
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160 { |
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161 FUNC_LOG; |
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162 |
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163 iUsbMan.DeviceStateNotification( KUsbAllStates, iDeviceState, iStatus ); |
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164 SetActive(); |
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165 } |
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166 |
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167 // ----------------------------------------------------------------------------- |
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168 // CHWRMFmtxUsbObserver::RunL() |
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169 // ----------------------------------------------------------------------------- |
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170 // |
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171 void CHWRMFmtxUsbObserver::RunL( ) |
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172 { |
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173 FUNC_LOG; |
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174 |
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175 TInt status(iStatus.Int()); |
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176 |
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177 LOG_IF_ERROR1( status, "CHWRMFmtxUsbObserver::RunL error, status=%d", status ); |
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178 |
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179 TBool connected(UsbConnected( iDeviceState )); // store state before subscribing again |
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180 |
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181 // prevent looping due to immediate completion |
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182 if ( status != KErrCancel && status != KErrServerTerminated ) |
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183 { |
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184 OrderUsbNotification(); |
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185 } |
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186 |
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187 if ( status == KErrNone ) |
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188 { |
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189 INFO_LOG2( "CHWRMFmtxUsbObserver::RunL: connected=%d, iConnected=%d", connected, iConnected ); |
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190 if ( connected != iConnected ) // notify only if state has changed |
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191 { |
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192 iConnected = connected; |
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193 iCallback.HandleConnectionChange( EFmtxWatcherObserverUsb, iConnected ); |
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194 } |
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195 } |
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196 } |
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197 |
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198 // ----------------------------------------------------------------------------- |
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199 // CHWRMFmtxUsbObserver::DoCancel |
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200 // --------------------------------------------------------------------------- |
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201 // |
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202 void CHWRMFmtxUsbObserver::DoCancel() |
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203 { |
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204 FUNC_LOG; |
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205 |
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206 iUsbMan.DeviceStateNotificationCancel(); |
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207 } |
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208 |
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209 // End of File |