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1 /* |
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2 * Copyright (c) 1997-2009 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: |
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15 * |
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16 */ |
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17 |
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18 #include <e32std.h> |
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19 #include <d32usbc.h> |
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20 #include "ActiveWriter.h" |
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21 #include "AcmConstants.h" |
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22 #include "AcmPanic.h" |
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23 #include "WriteObserver.h" |
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24 #include "AcmUtils.h" |
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25 #include <usb/usblogger.h> |
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26 |
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27 #ifdef __FLOG_ACTIVE |
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28 _LIT8(KLogComponent, "ECACM"); |
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29 #endif |
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30 |
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31 CActiveWriter::CActiveWriter(MWriteObserver& aParent, RDevUsbcClient& aLdd, TEndpointNumber aEndpoint) |
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32 : CActive(KEcacmAOPriority), |
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33 iParent(aParent), |
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34 iLdd(aLdd), |
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35 iEndpoint(aEndpoint), |
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36 iFirstPortion(NULL, 0), |
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37 iSecondPortion(NULL, 0) |
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38 /** |
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39 * Constructor. |
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40 * |
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41 * @param aParent The object that will be notified when write requests |
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42 * complete. |
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43 * @param aLdd The LDD handle to be used for posting write requests. |
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44 * @param aEndpoint The endpoint to write to. |
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45 */ |
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46 { |
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47 CActiveScheduler::Add(this); |
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48 } |
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49 |
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50 CActiveWriter::~CActiveWriter() |
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51 /** |
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52 * Destructor. |
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53 */ |
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54 { |
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55 LOG_FUNC |
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56 |
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57 Cancel(); |
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58 } |
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59 |
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60 CActiveWriter* CActiveWriter::NewL(MWriteObserver& aParent, |
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61 RDevUsbcClient& aLdd, |
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62 TEndpointNumber aEndpoint) |
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63 /** |
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64 * Standard two phase constructor. |
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65 * |
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66 * @param aParent The object that will be notified when write requests |
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67 * complete. |
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68 * @param aLdd The LDD handle to be used for posting write requests. |
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69 * @param aEndpoint The endpoint to write to. |
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70 * @return Ownership of a new CActiveWriter object. |
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71 */ |
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72 { |
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73 LOG_STATIC_FUNC_ENTRY |
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74 |
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75 CActiveWriter* self = new(ELeave) CActiveWriter(aParent, aLdd, aEndpoint); |
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76 return self; |
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77 } |
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78 |
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79 void CActiveWriter::Write(const TDesC8& aDes, |
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80 TInt aLen, |
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81 TBool aZlp) |
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82 /** |
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83 * Write the given data to the LDD. |
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84 * |
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85 * @param aDes A descriptor to write. |
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86 * @param aLen The length to write. |
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87 * @param aZlp Whether ZLP termination may be required. |
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88 */ |
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89 { |
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90 LOGTEXT(_L8(">>CActiveWriter::Write")); |
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91 |
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92 if ( aZlp ) |
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93 { |
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94 // the driver can be relied on to correctly handle appended ZLPs |
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95 // so use them when necessary.. |
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96 iLdd.Write(iStatus, iEndpoint, aDes, aLen, ETrue); |
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97 iWritingState = ECompleteMessage; |
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98 } |
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99 else |
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100 { |
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101 // do we need to send this descriptor in two portions to |
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102 // avoid finishing the last packet on a 64 byte boundary ( avoiding |
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103 // expectations of a ZLP by drivers that would handle them ) ? |
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104 |
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105 // If the write request is for zero bytes a 'split' would be erroneous. |
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106 TBool full64BytePacket = ( aLen % KMaxPacketSize ) ? EFalse : ETrue; |
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107 |
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108 if ( full64BytePacket == EFalse || aLen == 0 ) |
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109 { |
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110 iLdd.Write(iStatus, iEndpoint, aDes, aLen, EFalse); |
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111 iWritingState = ECompleteMessage; |
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112 LOGTEXT2(_L8("CActiveWriter::Writing %d bytes"), aLen); |
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113 } |
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114 else |
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115 { |
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116 // we do need to split the descriptor, sending aLen-1 bytes now |
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117 // and sending a second portion with the remaining 1 byte later |
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118 iFirstPortion.Set(aDes.Left(aLen-1)); |
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119 |
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120 // Use of Left here ensures that if we've been passed a descriptor |
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121 // longer than aLen (doesn't *currently* happen), we don't corrupt |
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122 // data. |
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123 iSecondPortion.Set(aDes.Left(aLen).Right(1)); |
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124 |
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125 iLdd.Write(iStatus, iEndpoint, iFirstPortion, aLen-1, EFalse); |
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126 |
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127 iWritingState = EFirstMessagePart; |
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128 LOGTEXT3(_L8("CActiveWriter::Writing %d bytes of the %d"), aLen-1, aLen); |
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129 } |
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130 } |
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131 SetActive(); |
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132 |
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133 LOGTEXT(_L8("<<CActiveWriter::Write")); |
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134 } |
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135 |
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136 void CActiveWriter::DoCancel() |
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137 /** |
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138 * Cancel an outstanding write. |
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139 */ |
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140 { |
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141 LOG_FUNC |
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142 |
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143 iLdd.WriteCancel(iEndpoint); |
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144 } |
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145 |
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146 void CActiveWriter::RunL() |
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147 /** |
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148 * This function will be called when the write completes. It notifies the |
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149 * parent class of the completion. |
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150 */ |
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151 { |
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152 LOG_LINE |
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153 LOGTEXT2(_L8(">>CActiveWriter::RunL iStatus=%d"), iStatus.Int()); |
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154 |
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155 if ( iWritingState == EFirstMessagePart ) |
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156 { |
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157 if ( iStatus.Int() == KErrNone ) |
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158 { |
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159 // now send the second part.. |
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160 iLdd.Write(iStatus, iEndpoint, iSecondPortion, iSecondPortion.Length(), EFalse); |
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161 iWritingState = EFinalMessagePart; |
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162 LOGTEXT(_L8("CActiveWriter::Writing 1 byte to complete original nx64 byte message")); |
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163 |
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164 SetActive(); |
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165 } |
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166 else |
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167 { |
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168 // the writing of the first part failed |
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169 iParent.WriteCompleted(iStatus.Int()); |
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170 } |
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171 } |
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172 else |
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173 { |
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174 // iWritingState == ECompleteMessage or EFinalMessagePart |
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175 iParent.WriteCompleted(iStatus.Int()); |
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176 } |
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177 |
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178 LOGTEXT(_L8("<<CActiveWriter::RunL")); |
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179 } |
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180 |
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181 // |
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182 // End of file |