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1 // Copyright (c) 2002-2009 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 // wins/specific/serialldd.cpp |
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15 // |
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16 // |
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17 |
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18 #include "winscomm.h" |
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19 #include <kernel/kern_priv.h> |
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20 #include <e32hal.h> |
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21 #include <e32uid.h> |
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22 |
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23 _LIT(KLddName,"Comm"); |
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24 |
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25 |
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26 enum TPanic |
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27 { |
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28 ESetConfigWhileRequestPending, |
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29 ESetSignalsSetAndClear, |
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30 EResetBuffers, |
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31 ESetReceiveBufferLength, |
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32 }; |
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33 |
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34 |
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35 inline TUint32 SafeSwap(TUint32 aNewValue, TUint32& aWord) |
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36 { return (TUint32)NKern::SafeSwap((TAny*)aNewValue, (TAny*&)aWord); } |
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37 |
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38 DECLARE_STANDARD_LDD() |
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39 { |
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40 return new DDeviceComm; |
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41 } |
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42 |
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43 |
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44 DDeviceComm::DDeviceComm() |
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45 { |
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46 iParseMask = KDeviceAllowAll; |
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47 iUnitsMask = 0xffffffff; // Leave units decision to the PDD |
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48 iVersion = TVersion(KCommsMajorVersionNumber,KCommsMinorVersionNumber,KCommsBuildVersionNumber); |
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49 } |
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50 |
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51 TInt DDeviceComm::Install() |
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52 { |
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53 return(SetName(&KLddName)); |
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54 } |
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55 |
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56 void DDeviceComm::GetCaps(TDes8& aDes) const |
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57 { |
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58 TPckgBuf<TCapsDevCommV01> b; |
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59 b().version = TVersion(KCommsMajorVersionNumber,KCommsMinorVersionNumber,KCommsBuildVersionNumber); |
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60 Kern::InfoCopy(aDes,b); |
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61 } |
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62 |
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63 TInt DDeviceComm::Create(DLogicalChannelBase*& aChannel) |
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64 { |
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65 aChannel = new DChannelComm; |
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66 return aChannel?KErrNone:KErrNoMemory; |
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67 } |
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68 |
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69 |
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70 DChannelComm::DChannelComm() |
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71 : |
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72 iRxCompleteDfc(DChannelComm::CompleteRxDfc,this,2), |
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73 iTxCompleteDfc(DChannelComm::CompleteTxDfc,this,2), |
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74 iRxDataAvailableDfc(DChannelComm::RxDataAvailableDfc,this,2), |
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75 iSigNotifyDfc(DChannelComm::SignalNotifyDfc,this,2), |
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76 // iTurnaroundMinMilliSeconds(0), |
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77 // iTurnaroundTimerRunning(EFalse), |
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78 // iTurnaroundTransmitDelayed(EFalse), |
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79 iTurnaroundTimer(DChannelComm::TurnaroundStartDfc, this), |
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80 iTurnaroundDfc(DChannelComm::TurnaroundTimeout, this, 2) |
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81 // iTurnaroundTxDesPtr(0), |
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82 // iTurnaroundTxDesLength(0) |
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83 { |
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84 iConfig.iRate = EBps9600; |
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85 iConfig.iDataBits = EData8; |
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86 iConfig.iStopBits = EStop1; |
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87 iConfig.iParity = EParityNone; |
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88 iConfig.iHandshake = KConfigObeyCTS; |
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89 iConfig.iParityError = KConfigParityErrorFail; |
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90 iConfig.iFifo = EFifoEnable; |
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91 iConfig.iTerminatorCount = 0; |
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92 iConfig.iXonChar = 0x11; |
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93 iConfig.iXoffChar = 0x13; |
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94 iConfig.iSIREnable = ESIRDisable; |
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95 |
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96 iTxError = KErrNone; |
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97 iRxError = KErrNone; |
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98 iRxDAError = KErrNone; |
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99 iSignalError = KErrNone; |
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100 iClientDestPtr = 0; |
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101 iClientSignalResultPtr = 0; |
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102 iClient = &Kern::CurrentThread(); |
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103 iClient->Open(); |
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104 } |
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105 |
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106 |
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107 DChannelComm::~DChannelComm() |
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108 { |
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109 Kern::SafeClose((DObject*&)iClient, NULL); |
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110 } |
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111 |
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112 void DChannelComm::Shutdown() |
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113 { |
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114 // clean-up... |
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115 if (iStatus == EActive) |
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116 Stop(EStopPwrDown); // stop PDD |
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117 |
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118 Complete(EAll, KErrAbort); |
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119 |
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120 iRxCompleteDfc.Cancel(); |
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121 iTxCompleteDfc.Cancel(); |
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122 iTurnaroundTimer.Cancel(); |
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123 iTurnaroundDfc.Cancel(); |
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124 iSigNotifyDfc.Cancel(); |
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125 iRxDataAvailableDfc.Cancel(); |
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126 } |
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127 |
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128 TInt DChannelComm::TurnaroundSet(TUint aNewTurnaroundMilliSeconds) |
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129 { |
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130 TInt r = KErrNone; |
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131 (void)TurnaroundStopTimer(); |
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132 iTurnaroundMinMilliSeconds = aNewTurnaroundMilliSeconds; |
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133 return r; |
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134 } |
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135 |
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136 TBool DChannelComm::TurnaroundStopTimer() |
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137 // Stop the timer and DFC |
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138 { |
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139 TInt irq = 0; |
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140 irq = NKern::DisableInterrupts(1); |
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141 TBool result = iTurnaroundTimerRunning; |
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142 if(result) |
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143 { |
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144 iTurnaroundTimerRunning = EFalse; |
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145 iTurnaroundTimer.Cancel(); |
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146 iTurnaroundDfc.Cancel(); |
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147 } |
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148 NKern::RestoreInterrupts(irq); |
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149 return result; |
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150 } |
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151 |
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152 TInt DChannelComm::TurnaroundClear() |
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153 // Clear any old timer |
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154 // Called for any change: from T > 0 to T == 0 or (T = t1 > 0) to (T = t2 > 0) |
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155 // POLICY: If a write has already been delayed, it will be started immediately (next reschedule) |
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156 { |
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157 TInt r = KErrNone; |
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158 |
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159 if(TurnaroundStopTimer()) |
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160 { |
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161 // if a write is waiting, start a DFC to run it |
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162 TurnaroundStartDfcImplementation(EFalse); |
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163 } |
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164 |
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165 iTurnaroundMinMilliSeconds = 0; |
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166 return r; |
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167 } |
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168 |
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169 void DChannelComm::TurnaroundStartDfc(TAny* aSelf) |
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170 { |
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171 DChannelComm* self = (DChannelComm*)aSelf; |
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172 self->TurnaroundStartDfcImplementation(ETrue); |
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173 } |
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174 |
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175 void DChannelComm::TurnaroundStartDfcImplementation(TBool inIsr) |
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176 { |
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177 TInt irq = 0; |
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178 if(!inIsr) |
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179 { |
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180 irq = NKern::DisableInterrupts(1); |
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181 } |
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182 iTurnaroundTimerRunning = EFalse; |
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183 if(iTurnaroundTransmitDelayed) |
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184 { |
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185 if(inIsr) |
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186 iTurnaroundDfc.Add(); |
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187 else |
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188 { |
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189 NKern::RestoreInterrupts(irq); |
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190 iTurnaroundDfc.Enque(); |
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191 } |
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192 return; |
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193 } |
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194 if(!inIsr) |
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195 { |
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196 NKern::RestoreInterrupts(irq); |
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197 } |
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198 } |
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199 |
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200 void DChannelComm::TurnaroundTimeout(TAny* aSelf) |
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201 { |
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202 DChannelComm* self = (DChannelComm*)aSelf; |
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203 self->TurnaroundTimeoutImplementation(); |
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204 } |
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205 |
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206 void DChannelComm::TurnaroundTimeoutImplementation(void) |
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207 { |
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208 TInt irq = NKern::DisableInterrupts(1); |
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209 if(iTurnaroundTransmitDelayed) |
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210 { |
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211 iTurnaroundTransmitDelayed = EFalse; // protected -> prevent reentrant ISR |
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212 NKern::RestoreInterrupts(irq); |
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213 if (iStatus==EClosed) |
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214 { |
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215 iTurnaroundTxDesPtr = 0; |
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216 iTurnaroundTxDesLength = 0; |
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217 Complete(ETx,KErrNotReady); |
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218 return; |
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219 } |
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220 |
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221 // fail signals checked in the PDD |
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222 InitiateWrite(iTurnaroundTxDesPtr, iTurnaroundTxDesLength); |
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223 iTurnaroundTxDesPtr = 0; |
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224 iTurnaroundTxDesLength = 0; |
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225 } |
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226 else |
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227 NKern::RestoreInterrupts(irq); |
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228 } |
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229 |
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230 TInt DChannelComm::DoCreate(TInt aUnit, const TDesC8* /*aInfo*/, const TVersion &aVer) |
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231 { |
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232 if(!Kern::CurrentThreadHasCapability(ECapabilityCommDD,__PLATSEC_DIAGNOSTIC_STRING("Checked by ECOMM.LDD (Comm Driver)"))) |
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233 return KErrPermissionDenied; |
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234 if (!Kern::QueryVersionSupported(TVersion(KCommsMajorVersionNumber,KCommsMinorVersionNumber,KCommsBuildVersionNumber),aVer)) |
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235 return KErrNotSupported; |
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236 |
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237 // set up the correct DFC queue |
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238 SetDfcQ(((DComm*)iPdd)->DfcQ(aUnit)); |
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239 iRxCompleteDfc.SetDfcQ(iDfcQ); |
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240 iTxCompleteDfc.SetDfcQ(iDfcQ); |
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241 iRxDataAvailableDfc.SetDfcQ(iDfcQ); |
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242 iSigNotifyDfc.SetDfcQ(iDfcQ); |
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243 iTurnaroundDfc.SetDfcQ(iDfcQ); |
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244 iMsgQ.Receive(); |
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245 |
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246 ((DComm *)iPdd)->iLdd = this; |
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247 |
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248 //setup the initial port configuration |
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249 PddConfigure(iConfig); |
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250 |
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251 return KErrNone; |
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252 } |
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253 |
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254 |
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255 |
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256 |
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257 void DChannelComm::Start() |
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258 { |
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259 if (iStatus != EClosed) |
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260 { |
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261 PddStart(); |
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262 iStatus = EActive; |
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263 } |
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264 } |
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265 |
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266 |
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267 |
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268 |
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269 void DChannelComm::HandleMsg(TMessageBase* aMsg) |
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270 { |
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271 TThreadMessage& m = *(TThreadMessage*)aMsg; |
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272 TInt id = m.iValue; |
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273 if (id == (TInt)ECloseMsg) |
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274 { |
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275 Shutdown(); |
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276 iStatus = EClosed; |
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277 m.Complete(KErrNone, EFalse); |
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278 return; |
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279 } |
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280 else if (id == KMaxTInt) |
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281 { |
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282 // DoCancel |
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283 DoCancel(m.Int0()); |
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284 m.Complete(KErrNone, ETrue); |
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285 return; |
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286 } |
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287 |
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288 if (id < 0) |
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289 { |
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290 // DoRequest |
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291 TRequestStatus* pS = (TRequestStatus*)m.Ptr0(); |
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292 TInt r = DoRequest(~id, pS, m.Ptr1(), m.Ptr2()); |
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293 if (r != KErrNone) |
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294 Kern::RequestComplete(iClient, pS, r); |
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295 m.Complete(KErrNone, ETrue); |
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296 } |
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297 else |
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298 { |
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299 // DoControl |
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300 TInt r = DoControl(id, m.Ptr0(), m.Ptr1()); |
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301 m.Complete(r, ETrue); |
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302 } |
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303 } |
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304 |
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305 |
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306 TInt DChannelComm::DoRequest(TInt aReqNo, TRequestStatus* aStatus, TAny* a1, TAny* a2) |
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307 { |
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308 |
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309 // |
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310 // First check if we have started |
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311 // |
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312 if (iStatus == EOpen) |
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313 { |
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314 Start(); |
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315 } |
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316 |
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317 // Now we can dispatch the request |
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318 TInt r = KErrNone; |
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319 TInt len = 0; |
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320 switch (aReqNo) |
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321 { |
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322 case RBusDevComm::ERequestRead: |
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323 if (a2) |
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324 //get the size of the client data |
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325 r = Kern::ThreadRawRead(iClient, a2, &len, sizeof(len)); |
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326 if (r == KErrNone) |
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327 { |
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328 if (a1) //doing a read |
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329 { |
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330 iRxStatus = aStatus; |
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331 //start the read |
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332 InitiateRead(a1,len); |
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333 } |
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334 else //notify read data availiable |
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335 { |
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336 iRxDAStatus = aStatus; |
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337 NotifyReadDataAvailable(); |
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338 } |
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339 } |
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340 break; |
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341 |
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342 case RBusDevComm::ERequestWrite: |
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343 { |
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344 if (iStatus == EClosed) |
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345 return KErrNotReady; |
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346 if (!a1) |
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347 a1 = (TAny*)1; |
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348 r = Kern::ThreadRawRead(iClient, a2, &len, sizeof(len)); //get the length of the data to write |
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349 if (r == KErrNone) |
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350 { |
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351 iTxStatus = aStatus; |
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352 TInt irq = NKern::DisableInterrupts(1); |
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353 if(iTurnaroundTimerRunning) |
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354 { |
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355 iTurnaroundTransmitDelayed = ETrue; |
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356 iTurnaroundTxDesPtr = a1; |
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357 iTurnaroundTxDesLength = len; |
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358 NKern::RestoreInterrupts(irq); |
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359 } |
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360 else |
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361 { |
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362 NKern::RestoreInterrupts(irq); |
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363 InitiateWrite(a1, len); //a1 is ptr to data to write (on client side) |
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364 } |
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365 } |
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366 break; |
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367 } |
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368 |
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369 case RBusDevComm::ERequestNotifySignalChange: |
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370 { |
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371 //a1 has place to put the result |
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372 //a2 has the signal mask |
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373 if (!a1) |
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374 { |
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375 r = KErrArgument; |
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376 break; |
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377 } |
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378 |
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379 //start the signal request |
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380 TInt mask = 0; |
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381 r = Kern::ThreadRawRead(iClient, a2, &mask, sizeof(mask)); //get the signal mask |
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382 if (r == KErrNone) |
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383 { |
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384 iSignalStatus = aStatus; |
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385 InitiateNotifySignals(a1, mask); |
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386 } |
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387 break; |
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388 } |
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389 |
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390 |
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391 case RBusDevComm::ERequestBreak: |
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392 Complete(aReqNo, KErrNotSupported); |
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393 break; |
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394 |
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395 default: |
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396 r = KErrNotSupported; |
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397 break; |
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398 |
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399 } |
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400 return r; |
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401 } |
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402 |
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403 TInt DChannelComm::SetConfig(TCommConfigV01& c) |
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404 { |
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405 iConfig = c; |
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406 PddConfigure(iConfig); |
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407 return KErrNone; |
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408 } |
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409 |
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410 TInt DChannelComm::DoControl(TInt aFunction, TAny* a1, TAny* a2) |
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411 { |
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412 |
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413 TCommConfigV01 c; |
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414 TInt r = KErrNone; |
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415 |
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416 switch (aFunction) |
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417 { |
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418 case RBusDevComm::EControlConfig: |
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419 { |
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420 //get the current configuration |
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421 TPtrC8 cfg((const TUint8*)&iConfig, sizeof(iConfig)); |
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422 r = Kern::ThreadDesWrite(iClient, a1, cfg, 0, KTruncateToMaxLength, iClient); |
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423 break; |
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424 } |
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425 |
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426 case RBusDevComm::EControlSetConfig: |
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427 { |
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428 if (AreAnyPending()) |
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429 Kern::PanicCurrentThread(_L("D32COMM"), ESetConfigWhileRequestPending); |
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430 else |
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431 { |
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432 memclr(&c, sizeof(c)); |
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433 TPtr8 cfg((TUint8*)&c, 0, sizeof(c)); |
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434 r = Kern::ThreadDesRead(iClient, a1, cfg, 0, 0); |
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435 if (r == KErrNone) |
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436 r = SetConfig(c); //set the new configuration |
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437 } |
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438 break; |
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439 } |
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440 |
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441 case RBusDevComm::EControlCaps: |
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442 { |
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443 //get capabilities |
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444 TCommCaps2 caps; |
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445 PddCaps(caps); //call ipdd->Caps |
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446 r = Kern::ThreadDesWrite(iClient, a1, caps, 0, KTruncateToMaxLength, iClient); |
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447 break; |
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448 } |
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449 |
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450 case RBusDevComm::EControlSignals: |
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451 { |
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452 r = Signals(); |
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453 break; |
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454 } |
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455 |
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456 case RBusDevComm::EControlSetSignals: |
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457 { |
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458 // if (((TUint)a1)&((TUint)a2)) //can't set and clear at same time |
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459 // { |
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460 // Kern::PanicCurrentThread(_L("D32COMM"), ESetSignalsSetAndClear); |
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461 // } |
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462 // else |
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463 { |
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464 |
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465 SetSignals((TUint)a1, (TUint)a2); |
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466 } |
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467 break; |
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468 } |
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469 |
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470 case RBusDevComm::EControlQueryReceiveBuffer: |
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471 r = RxCount(); |
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472 break; |
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473 |
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474 case RBusDevComm::EControlResetBuffers: |
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475 if (AreAnyPending()) |
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476 Kern::PanicCurrentThread(_L("D32COMM"), EResetBuffers); |
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477 else |
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478 ResetBuffers(ETrue); |
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479 break; |
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480 |
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481 case RBusDevComm::EControlReceiveBufferLength: |
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482 r = RxBufferSize(); |
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483 break; |
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484 |
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485 case RBusDevComm::EControlSetReceiveBufferLength: |
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486 if (AreAnyPending()) |
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487 Kern::PanicCurrentThread(_L("D32COMM"), ESetReceiveBufferLength); |
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488 else |
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489 r = SetRxBufferSize((TInt)a1); |
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490 break; |
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491 |
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492 case RBusDevComm::EControlMinTurnaroundTime: |
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493 r = iTurnaroundMicroSeconds; // used saved value |
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494 break; |
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495 |
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496 case RBusDevComm::EControlSetMinTurnaroundTime: |
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497 { |
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498 if ((TInt)a1<0) |
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499 a1=(TAny*)0; |
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500 iTurnaroundMicroSeconds = (TUint)a1; // save this |
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501 TUint newTurnaroundMilliSeconds = (TUint)a1/1000; // convert to ms |
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502 if(newTurnaroundMilliSeconds != iTurnaroundMinMilliSeconds) |
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503 { |
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504 // POLICY: if a new turnaround time is set before the previous running timer has expired and a |
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505 // write request has been queued, the transmission goes ahead immediately |
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506 TurnaroundClear(); |
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507 if(newTurnaroundMilliSeconds > 0) |
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508 { |
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509 r = TurnaroundSet(newTurnaroundMilliSeconds); |
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510 } |
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511 } |
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512 } |
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513 break; |
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514 |
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515 default: |
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516 r = KErrNotSupported; |
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517 } |
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518 return(r); |
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519 } |
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520 |
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521 |
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522 void DChannelComm::SignalNotifyDfc(TAny* aPtr) |
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523 { |
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524 DChannelComm* pC = (DChannelComm*)aPtr; |
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525 pC->DoSignalNotify(); |
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526 } |
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527 |
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528 void DChannelComm::RxDataAvailableDfc(TAny* aPtr) |
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529 { |
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530 DChannelComm* pC = (DChannelComm*)aPtr; |
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531 pC->DoRxDataAvailable(); |
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532 } |
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533 |
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534 void DChannelComm::DoRxDataAvailable() |
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535 { |
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536 Complete(ERxDA, iRxDAError); |
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537 iRxDAError = KErrNone; |
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538 } |
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539 |
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540 void DChannelComm::DoSignalNotify() |
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541 { |
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542 //copy the data back to the client |
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543 if (iSignalError == KErrNone) |
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544 iSignalError = Kern::ThreadRawWrite(iClient, iClientSignalResultPtr,&iSignalResult, sizeof(iSignalResult), iClient); |
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545 Complete(ESigChg, iSignalError); |
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546 iSignalError = KErrNone; |
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547 } |
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548 |
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549 void DChannelComm::CompleteTxDfc(TAny* aPtr) |
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550 { |
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551 DChannelComm* pC = (DChannelComm*)aPtr; |
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552 pC->DoCompleteTx(); |
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553 } |
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554 |
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555 void DChannelComm::DoCompleteTx() |
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556 { |
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557 Complete(ETx, iTxError); |
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558 iTxError = KErrNone; |
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559 } |
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560 |
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561 void DChannelComm::CompleteRxDfc(TAny* aPtr) |
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562 { |
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563 DChannelComm* pC = (DChannelComm*)aPtr; |
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564 pC->DoCompleteRx(); |
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565 } |
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566 |
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567 void DChannelComm::DoCompleteRx() |
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568 { |
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569 if (iRxError == KErrNone) |
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570 { |
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571 //copy the data back to the client |
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572 iRxError = Kern::ThreadDesWrite(iClient, (TDes8*)iClientDestPtr, *RxBuffer(), 0, KChunkShiftBy0, iClient); |
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573 } |
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574 Complete(ERx, iRxError); |
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575 iRxError = KErrNone; |
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576 TInt irq = NKern::DisableInterrupts(1); |
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577 if(iTurnaroundMinMilliSeconds > 0) |
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578 { |
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579 // POLICY: if timer is running from a previous read, stop it and re-start it |
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580 if(iTurnaroundTimerRunning) |
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581 { |
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582 iTurnaroundTimer.Cancel(); |
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583 iTurnaroundDfc.Cancel(); |
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584 } |
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585 iTurnaroundTimerRunning = ETrue; |
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586 TInt timeout = NKern::TimerTicks(iTurnaroundMinMilliSeconds); |
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587 iTurnaroundTimer.OneShot(timeout); |
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588 } |
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589 NKern::RestoreInterrupts(irq); |
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590 } |
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591 |
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592 void DChannelComm::DoCancel(TInt aMask) |
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593 { |
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594 if (aMask & RBusDevComm::ERequestReadCancel) |
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595 { |
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596 ReadCancel(); |
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597 } |
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598 |
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599 if (aMask & RBusDevComm::ERequestWriteCancel) |
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600 { |
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601 TInt irq = NKern::DisableInterrupts(1); |
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602 if(iTurnaroundTransmitDelayed) |
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603 { |
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604 iTurnaroundTxDesPtr = 0; |
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605 iTurnaroundTxDesLength = 0; |
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606 iTurnaroundTransmitDelayed = EFalse; |
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607 } |
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608 NKern::RestoreInterrupts(irq); |
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609 |
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610 WriteCancel(); |
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611 } |
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612 |
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613 if (aMask & RBusDevComm::ERequestNotifySignalChangeCancel) |
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614 { |
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615 SignalChangeCancel(); |
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616 Complete(ESigChg,KErrCancel); |
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617 } |
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618 |
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619 } |
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620 |
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621 |
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622 void DChannelComm::InitiateWrite(TAny *aTxDes, TInt aLength) |
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623 { |
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624 |
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625 //aTxDes has client side data |
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626 //aLength has the len |
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627 |
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628 if (!aTxDes) |
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629 { |
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630 Complete(ETx, KErrArgument); |
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631 return; |
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632 } |
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633 // call the pdd to fill its buffer and write the data |
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634 Write(iClient, aTxDes, aLength); |
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635 } |
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636 |
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637 void DChannelComm::InitiateRead(TAny *aRxDes, TInt aLength) |
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638 { |
|
639 |
|
640 // Complete zero-length read immediately. maybe not |
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641 |
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642 // if (aLength == 0) |
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643 // { |
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644 // Complete(ERx, KErrNone); |
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645 // return; |
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646 // } |
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647 TInt max=Kern::ThreadGetDesMaxLength(iClient,aRxDes); |
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648 |
|
649 if (max < Abs(aLength) || max < 0) |
|
650 Complete(ERx, KErrGeneral); |
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651 // do not start the Turnaround timer (invalid Descriptor this read never starts) |
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652 else |
|
653 { |
|
654 iClientDestPtr = aRxDes; |
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655 Read(iClient, aRxDes, aLength); |
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656 } |
|
657 } |
|
658 |
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659 void DChannelComm::InitiateNotifySignals(TAny *aSignalResultPtr, TInt aMask) |
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660 { |
|
661 //aMask has the mask of signals we require |
|
662 //aSignalResultPtr is a pointer to the clients area for the result |
|
663 iClientSignalResultPtr = (TUint*)aSignalResultPtr; |
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664 NotifySignals(iClient, aMask); |
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665 } |
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666 |
|
667 void DChannelComm::NotifyReadDataAvailable() |
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668 { |
|
669 NotifyDataAvailable(); |
|
670 } |
|
671 |
|
672 |
|
673 void DChannelComm::Complete(TInt aMask, TInt aReason) |
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674 { |
|
675 if (aMask & ERx) |
|
676 Kern::RequestComplete(iClient, iRxStatus, aReason); |
|
677 if (aMask & ETx) |
|
678 Kern::RequestComplete(iClient, iTxStatus, aReason); |
|
679 if (aMask & ESigChg) |
|
680 Kern::RequestComplete(iClient, iSignalStatus, aReason); |
|
681 if (aMask & ERxDA) |
|
682 Kern::RequestComplete(iClient, iRxDAStatus, aReason); |
|
683 } |
|
684 |
|
685 |