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1 // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 |
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17 |
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18 #include "hwrmfmtxusbobserver.h" |
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19 #include "trace.h" |
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20 |
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21 // bitmask for requesting notification of every USB device state change |
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22 const TUint KUsbAllStates = 0xFFFFFFFF; |
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23 |
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24 // ============================ LOCAL FUNCTIONS =============================== |
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25 |
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26 // ----------------------------------------------------------------------------- |
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27 // UsbConnected() |
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28 // ----------------------------------------------------------------------------- |
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29 // |
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30 static TBool UsbConnected( TUsbDeviceState aDeviceState ) |
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31 { |
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32 TBool connected( ETrue ); |
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33 |
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34 if ( aDeviceState == EUsbDeviceStateUndefined ) |
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35 { |
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36 connected = EFalse; |
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37 } |
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38 |
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39 return connected; |
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40 } |
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41 |
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42 // ============================ MEMBER FUNCTIONS =============================== |
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43 |
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44 // ----------------------------------------------------------------------------- |
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45 // CHWRMFmtxUsbObserver::NewL() |
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46 // ----------------------------------------------------------------------------- |
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47 // |
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48 CHWRMFmtxUsbObserver* CHWRMFmtxUsbObserver::NewL( MHWRMFmtxConnObserverCallback& aObserver ) |
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49 { |
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50 FUNC_LOG; |
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51 |
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52 CHWRMFmtxUsbObserver* self = new( ELeave ) CHWRMFmtxUsbObserver( aObserver ); |
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53 CleanupStack::PushL( self ); |
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54 self->ConstructL(); |
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55 CleanupStack::Pop( self ); |
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56 return self; |
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57 } |
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58 |
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59 // ----------------------------------------------------------------------------- |
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60 // CHWRMFmtxUsbObserver::~CHWRMFmtxUsbObserver() |
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61 // ----------------------------------------------------------------------------- |
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62 // |
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63 CHWRMFmtxUsbObserver::~CHWRMFmtxUsbObserver() |
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64 { |
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65 FUNC_LOG; |
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66 |
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67 Cancel(); |
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68 iUsbMan.Close(); |
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69 } |
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70 |
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71 // ----------------------------------------------------------------------------- |
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72 // CHWRMFmtxUsbObserver::GetStatusL |
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73 // ----------------------------------------------------------------------------- |
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74 // |
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75 TBool CHWRMFmtxUsbObserver::GetStatusL() |
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76 { |
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77 FUNC_LOG; |
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78 |
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79 TUsbDeviceState deviceState; |
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80 TInt err( iUsbMan.GetDeviceState( deviceState ) ); |
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81 |
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82 LOG_IF_ERROR2( err, "CHWRMFmtxUsbObserver::StartObservingL - err %d, state %d", err, deviceState ); |
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83 |
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84 User::LeaveIfError( err ); |
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85 |
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86 return UsbConnected( deviceState ); |
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87 } |
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88 |
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89 |
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90 // ----------------------------------------------------------------------------- |
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91 // CHWRMFmtxUsbObserver::StartObservingL |
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92 // ----------------------------------------------------------------------------- |
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93 // |
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94 void CHWRMFmtxUsbObserver::StartObservingL() |
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95 { |
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96 FUNC_LOG; |
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97 |
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98 if( !IsActive() ) |
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99 { |
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100 OrderUsbNotification(); |
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101 |
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102 // check the initial status, so that only state change is notified |
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103 iConnected = GetStatusL(); |
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104 } |
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105 } |
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106 |
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107 // ----------------------------------------------------------------------------- |
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108 // CHWRMFmtxUsbObserver::StopObserving |
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109 // ----------------------------------------------------------------------------- |
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110 // |
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111 void CHWRMFmtxUsbObserver::StopObserving() |
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112 { |
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113 FUNC_LOG; |
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114 |
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115 Cancel(); |
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116 } |
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117 |
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118 // ----------------------------------------------------------------------------- |
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119 // CHWRMFmtxUsbObserver::CHWRMFmtxUsbObserver() |
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120 // ----------------------------------------------------------------------------- |
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121 // |
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122 CHWRMFmtxUsbObserver::CHWRMFmtxUsbObserver( MHWRMFmtxConnObserverCallback& aObserver ) : |
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123 CActive( EPriorityStandard ), |
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124 iDeviceState( EUsbDeviceStateUndefined ), |
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125 iCallback( aObserver ), |
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126 iConnected( ETrue ) |
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127 { |
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128 FUNC_LOG; |
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129 |
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130 CActiveScheduler::Add( this ); |
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131 } |
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132 |
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133 // ----------------------------------------------------------------------------- |
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134 // CHWRMFmtxUsbObserver::ConstructL |
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135 // ----------------------------------------------------------------------------- |
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136 // |
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137 void CHWRMFmtxUsbObserver::ConstructL() |
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138 { |
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139 FUNC_LOG; |
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140 |
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141 // Connect to usbman |
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142 TInt err = iUsbMan.Connect(); |
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143 |
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144 LOG_IF_ERROR1( err, "CHWRMFmtxUsbObserver::ConstructL - err %d", err ); |
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145 |
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146 User::LeaveIfError( err ); |
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147 } |
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148 |
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149 // ----------------------------------------------------------------------------- |
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150 // CHWRMFmtxUsbObserver::OrderUsbNotification() |
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151 // ----------------------------------------------------------------------------- |
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152 // |
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153 void CHWRMFmtxUsbObserver::OrderUsbNotification() |
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154 { |
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155 FUNC_LOG; |
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156 |
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157 iUsbMan.DeviceStateNotification( KUsbAllStates, iDeviceState, iStatus ); |
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158 SetActive(); |
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159 } |
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160 |
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161 // ----------------------------------------------------------------------------- |
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162 // CHWRMFmtxUsbObserver::RunL() |
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163 // ----------------------------------------------------------------------------- |
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164 // |
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165 void CHWRMFmtxUsbObserver::RunL( ) |
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166 { |
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167 FUNC_LOG; |
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168 |
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169 TInt status(iStatus.Int()); |
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170 |
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171 LOG_IF_ERROR1( status, "CHWRMFmtxUsbObserver::RunL error, status=%d", status ); |
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172 |
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173 TBool connected(UsbConnected( iDeviceState )); // store state before subscribing again |
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174 |
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175 // prevent looping due to immediate completion |
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176 if ( status != KErrCancel && status != KErrServerTerminated ) |
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177 { |
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178 OrderUsbNotification(); |
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179 } |
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180 |
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181 if ( status == KErrNone ) |
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182 { |
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183 INFO_LOG2( "CHWRMFmtxUsbObserver::RunL: connected=%d, iConnected=%d", connected, iConnected ); |
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184 if ( connected != iConnected ) // notify only if state has changed |
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185 { |
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186 iConnected = connected; |
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187 iCallback.HandleConnectionChange( EFmtxWatcherObserverUsb, iConnected ); |
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188 } |
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189 } |
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190 } |
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191 |
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192 // ----------------------------------------------------------------------------- |
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193 // CHWRMFmtxUsbObserver::DoCancel |
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194 // --------------------------------------------------------------------------- |
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195 // |
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196 void CHWRMFmtxUsbObserver::DoCancel() |
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197 { |
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198 FUNC_LOG; |
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199 |
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200 iUsbMan.DeviceStateNotificationCancel(); |
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201 } |
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202 |
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203 // End of File |