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1 /* |
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2 * Copyright (c) 2010 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 the License "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 - contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Minimalistic non volatile memory driver |
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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 "locmedia.h" |
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20 #include "platform.h" |
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21 #include "variantmediadef.h" |
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22 #include "syborg_mednvmemory.h" |
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23 #include "syborg.h" |
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24 |
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25 _LIT(KNVMemPddName, "Media.MEDNVMEMORY"); |
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26 _LIT(KNVMemDriveName,NVMEM1_DRIVENAME); |
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27 |
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28 class DPhysicalDeviceMediaNVMemory : public DPhysicalDevice |
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29 { |
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30 public: |
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31 DPhysicalDeviceMediaNVMemory(); |
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32 public: |
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33 // Implementing the interface |
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34 virtual TInt Install(); |
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35 virtual void GetCaps(TDes8& aDes) const; |
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36 virtual TInt Create(DBase*& aChannel, TInt aMediaId, const TDesC8* anInfo, const TVersion& aVer); |
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37 virtual TInt Validate(TInt aDeviceType, const TDesC8* anInfo, const TVersion& aVer); |
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38 virtual TInt Info(TInt aFunction, TAny* a1); |
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39 }; |
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40 |
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41 class DMediaDriverNVMemory : public DMediaDriver |
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42 { |
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43 public: |
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44 DMediaDriverNVMemory(TInt aMediaId); |
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45 public: |
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46 // Implementing the interface |
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47 virtual TInt Request(TLocDrvRequest& aRequest); |
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48 virtual void Disconnect(DLocalDrive* aLocalDrive, TThreadMessage* aMsg); |
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49 virtual TInt PartitionInfo(TPartitionInfo &anInfo); |
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50 virtual void NotifyPowerDown(); |
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51 virtual void NotifyEmergencyPowerDown(); |
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52 public: |
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53 void CompleteRequest(TInt aReason); |
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54 TInt DoCreate(TInt aMediaId); |
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55 TInt Caps(TLocDrvRequest& aRequest); |
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56 TInt Read(); |
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57 TInt Write(); |
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58 TInt Format(); |
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59 static void TransactionLaunchDfc(TAny* aMediaDriver); |
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60 void DoTransactionLaunchDfc(); |
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61 static void SessionEndDfc(TAny* aMediaDriver); |
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62 void DoSessionEndDfc(); |
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63 TUint32 GetNVMemSize( void ); |
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64 |
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65 public: |
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66 TUint32 iLatestTransferSectorCount; |
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67 TDfc iSessionEndDfc; |
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68 |
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69 private: |
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70 TInt ContinueTransaction( TUint32 aTransactionSectorOffset, TUint32 aTransactionSectorCount, TUint32 aDirection ); |
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71 static void Isr(TAny* aPtr); |
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72 |
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73 private: |
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74 TLocDrvRequest* iCurrentRequest; // Current Request |
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75 Int64 iTotalLength; |
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76 Int64 iProsessedLength; |
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77 Int64 iPos; |
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78 TPhysAddr iTransferBufferPhys; |
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79 TUint8* iTransferBufferLin; |
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80 TUint32 iHead; |
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81 TUint32 iTail; |
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82 TUint32 iSplitted; |
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83 TUint32 iAlignmentOverhead; |
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84 TBool iReadModifyWrite; |
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85 TDfc iTransactionLaunchDfc; |
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86 }; |
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87 |
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88 DPhysicalDeviceMediaNVMemory::DPhysicalDeviceMediaNVMemory() |
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89 // |
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90 // Constructor |
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91 // |
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92 { |
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93 __DEBUG_PRINT(">DPhysicalDeviceMediaNVMemory::DPhysicalDeviceMediaNVMemory"); |
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94 iUnitsMask=0x1; |
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95 iVersion=TVersion(KMediaDriverInterfaceMajorVersion,KMediaDriverInterfaceMinorVersion,KMediaDriverInterfaceBuildVersion); |
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96 } |
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97 |
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98 TInt DPhysicalDeviceMediaNVMemory::Install() |
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99 // |
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100 // Install the Internal NVMem PDD. |
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101 // |
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102 { |
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103 __DEBUG_PRINT("DPhysicalDeviceMediaNVMemory::Install()"); |
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104 return SetName(&KNVMemPddName); |
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105 } |
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106 |
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107 void DPhysicalDeviceMediaNVMemory::GetCaps(TDes8& /*aDes*/) const |
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108 // |
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109 // Return the media drivers capabilities. |
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110 // |
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111 { |
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112 __DEBUG_PRINT("DPhysicalDeviceMediaNVMemory::GetCaps()"); |
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113 } |
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114 |
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115 TInt DPhysicalDeviceMediaNVMemory::Create(DBase*& aChannel, TInt aMediaId, const TDesC8* /* anInfo */,const TVersion &aVer) |
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116 // |
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117 // Create an Internal Ram media driver. |
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118 // |
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119 { |
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120 __DEBUG_PRINT("DPhysicalDeviceMediaNVMemory::Create()"); |
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121 if (!Kern::QueryVersionSupported(iVersion,aVer)) |
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122 return KErrNotSupported; |
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123 TInt r=KErrNoMemory; |
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124 DMediaDriverNVMemory* pD=new DMediaDriverNVMemory(aMediaId); |
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125 aChannel=pD; |
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126 if (pD) |
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127 { |
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128 r=pD->DoCreate(aMediaId); |
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129 } |
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130 if( r==KErrNone ) |
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131 { |
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132 pD->OpenMediaDriverComplete(KErrNone); |
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133 } |
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134 |
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135 return r; |
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136 } |
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137 |
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138 TInt DPhysicalDeviceMediaNVMemory::Validate(TInt aDeviceType, const TDesC8* /*anInfo*/, const TVersion& aVer) |
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139 { |
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140 __DEBUG_PRINT("DPhysicalDeviceMediaNVMemory::Validate()"); |
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141 if (!Kern::QueryVersionSupported(iVersion,aVer)) |
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142 return KErrNotSupported; |
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143 if (aDeviceType!=EFixedMedia1) |
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144 return KErrNotSupported; |
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145 return KErrNone; |
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146 } |
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147 |
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148 TInt DPhysicalDeviceMediaNVMemory::Info(TInt aFunction, TAny*) |
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149 // |
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150 // Return the priority of this media driver |
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151 // |
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152 { |
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153 __DEBUG_PRINT("DPhysicalDeviceMediaNVMemory::Info()"); |
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154 if (aFunction==EPriority) |
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155 return KMediaDriverPriorityNormal; |
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156 return KErrNotSupported; |
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157 } |
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158 |
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159 DMediaDriverNVMemory::DMediaDriverNVMemory(TInt aMediaId) |
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160 // |
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161 // Constructor. |
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162 // |
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163 : DMediaDriver(aMediaId), |
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164 iSessionEndDfc(DMediaDriverNVMemory::SessionEndDfc, this, 1), |
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165 iTransferBufferPhys(0), |
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166 iTransactionLaunchDfc(DMediaDriverNVMemory::TransactionLaunchDfc, this, KMaxDfcPriority) |
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167 { |
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168 __DEBUG_PRINT("DMediaDriverNVMemory::DMediaDriverNVMemory()"); |
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169 } |
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170 |
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171 TInt DMediaDriverNVMemory::DoCreate(TInt /*aMediaId*/) |
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172 // |
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173 // Create the media driver. |
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174 // |
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175 { |
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176 __DEBUG_PRINT(">DMediaDriverNVMemory::DoCreate"); |
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177 TInt r = KErrNone; |
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178 // Inform our size |
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179 Int64 size=GetNVMemSize()<<KDiskSectorShift; |
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180 if( size<=0 ) |
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181 { |
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182 Kern::Fault("DMediaDriverNVMemory zero size nv memory array", 0); |
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183 } |
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184 SetTotalSizeInBytes(size); |
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185 // Some dfc initialization |
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186 if( r==KErrNone ) |
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187 { |
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188 iSessionEndDfc.SetDfcQ( this->iPrimaryMedia->iDfcQ ); |
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189 iTransactionLaunchDfc.SetDfcQ( this->iPrimaryMedia->iDfcQ ); |
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190 } |
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191 // Create our piece of physically contiguous transfer buffer. |
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192 r = Epoc::AllocPhysicalRam( KNVMemTransferBufferSize, iTransferBufferPhys ); |
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193 if( r != KErrNone ) |
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194 { |
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195 Kern::Fault("DMediaDriverNVMemory Allocate Ram %d",r); |
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196 } |
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197 |
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198 DPlatChunkHw* bufChunk = NULL; |
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199 |
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200 // Create HW Memory Chunk |
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201 r = DPlatChunkHw::New( bufChunk, iTransferBufferPhys, KNVMemTransferBufferSize, EMapAttrUserRw | EMapAttrFullyBlocking ); |
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202 |
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203 if( r != KErrNone ) |
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204 { |
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205 // Check Physical Memory |
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206 if( iTransferBufferPhys ) |
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207 { |
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208 // Free Physical Memory |
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209 Epoc::FreePhysicalRam( iTransferBufferPhys, KNVMemTransferBufferSize ); |
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210 } |
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211 Kern::Fault("DMediaDriverNVMemory error in creating transfer buffer", r); |
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212 } |
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213 |
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214 // Set Main Buffer Pointer |
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215 iTransferBufferLin = reinterpret_cast<TUint8*>(bufChunk->LinearAddress()); |
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216 |
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217 // Inform "hardware" about the shared memory |
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218 WriteReg( KHwNVMemoryDevice, R_NVMEM_SHARED_MEMORY_BASE, iTransferBufferPhys ); |
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219 WriteReg( KHwNVMemoryDevice, R_NVMEM_SHARED_MEMORY_SIZE, KNVMemTransferBufferSize ); |
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220 WriteReg( KHwNVMemoryDevice, R_NVMEM_ENABLE, 1 ); |
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221 |
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222 // Set up interrupt service |
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223 r = Interrupt::Bind( EIntNVMemoryDevice, Isr, this ); |
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224 Interrupt::Enable( EIntNVMemoryDevice ); |
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225 |
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226 |
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227 __DEBUG_PRINT("<DMediaDriverNVMemory::DoCreate %d", r); |
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228 return(r); |
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229 } |
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230 |
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231 TInt DMediaDriverNVMemory::Request(TLocDrvRequest& m) |
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232 { |
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233 TInt request=m.Id(); |
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234 __DEBUG_PRINT(">DMediaDriverNVMemory::Request %d",request); |
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235 TInt r=KErrNone; |
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236 |
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237 // Requests that can be handled synchronously |
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238 if( request == DLocalDrive::ECaps ) |
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239 { |
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240 r=Caps(m); |
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241 return r; |
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242 } |
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243 |
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244 // All other requests must be deferred if a request is currently in progress |
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245 if (iCurrentRequest) |
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246 { |
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247 // a request is already in progress, so hold on to this one |
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248 r = KMediaDriverDeferRequest; |
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249 } |
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250 else |
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251 { |
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252 |
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253 iCurrentRequest=&m; |
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254 iProsessedLength = 0; |
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255 iHead = 0; |
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256 iTail = 0; |
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257 iSplitted = 0; |
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258 iAlignmentOverhead = 0; |
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259 |
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260 iPos = m.Pos(); |
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261 iTotalLength = m.Length(); |
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262 |
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263 |
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264 __DEBUG_PRINT(">DMediaDriverNVMemory::Request pos:0x%lx len:0x%lx", iPos, iTotalLength); |
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265 if( iTotalLength<0 || iPos<0 ) |
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266 { |
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267 Kern::Fault("DMediaDriverNVMemory::Request: illegal access!", 0); |
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268 } |
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269 // Handle unaligned operations |
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270 iHead = iPos % KDiskSectorSize; |
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271 TUint32 tailAlignment = ((iHead + iTotalLength) % KDiskSectorSize); |
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272 if( tailAlignment ) |
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273 { |
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274 iTail = KDiskSectorSize - tailAlignment; |
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275 } |
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276 |
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277 iSplitted = (iTotalLength + iHead + iTail) / KNVMemTransferBufferSize; |
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278 |
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279 __DEBUG_PRINT(">DMediaDriverNVMemory::Request head: %d tail: %d splitted: %d\n", iHead, iTail, iSplitted ); |
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280 __DEBUG_PRINT(">DMediaDriverNVMemory::Request partitionlen: %lx", iCurrentRequest->Drive()->iPartitionLen ); |
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281 |
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282 if( (iTotalLength + iPos) > iCurrentRequest->Drive()->iPartitionLen ) |
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283 { |
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284 Kern::Fault("DMediaDriverNVMemory::Request: Access over partition boundary!", 0); |
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285 } |
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286 if( iTotalLength > KMaxTInt32 ) |
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287 { |
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288 Kern::Fault("DMediaDriverNVMemory::Request: Access length overflow!", 0); |
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289 } |
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290 switch (request) |
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291 { |
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292 case DLocalDrive::ERead: |
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293 case DLocalDrive::EWrite: |
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294 case DLocalDrive::EFormat: |
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295 __DEBUG_PRINT("DMediaDriverNVMemory::Request iTransactionLaunchDfc.Enque()>"); |
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296 iTransactionLaunchDfc.Enque(); |
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297 __DEBUG_PRINT("DMediaDriverNVMemory::Request iTransactionLaunchDfc.Enque()<"); |
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298 break; |
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299 case DLocalDrive::EEnlarge: |
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300 case DLocalDrive::EReduce: |
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301 default: |
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302 r=KErrNotSupported; |
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303 break; |
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304 } |
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305 } |
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306 |
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307 __DEBUG_PRINT("<DMediaDriverNVMemory::Request %d",r); |
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308 return r; |
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309 } |
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310 |
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311 void DMediaDriverNVMemory::CompleteRequest(TInt aReason) |
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312 // |
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313 // completes the request which is being currently processed |
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314 // |
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315 { |
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316 __DEBUG_PRINT("DMediaDriverNVMemory::CompleteRequest() reason: %d", aReason); |
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317 TLocDrvRequest* pR=iCurrentRequest; |
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318 if (pR) |
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319 { |
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320 iCurrentRequest=NULL; |
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321 DMediaDriver::Complete(*pR,aReason); |
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322 } |
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323 } |
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324 |
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325 void DMediaDriverNVMemory::Disconnect( DLocalDrive* aLocalDrive, TThreadMessage* aMsg ) |
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326 { |
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327 __DEBUG_PRINT(">DMediaDriverNVMemory::Disconnect()"); |
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328 // Complete using the default implementation |
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329 DMediaDriver::Disconnect(aLocalDrive, aMsg); |
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330 __DEBUG_PRINT("<DMediaDriverNVMemory::Disconnect()"); |
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331 } |
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332 |
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333 void DMediaDriverNVMemory::NotifyPowerDown() |
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334 { |
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335 __DEBUG_PRINT("DMediaDriverNVMemory::NotifyPowerDown()"); |
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336 // no action required |
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337 } |
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338 |
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339 void DMediaDriverNVMemory::NotifyEmergencyPowerDown() |
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340 { |
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341 __DEBUG_PRINT("DMediaDriverNVMemory::NotifyEmergencyPowerDown()"); |
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342 // no action required |
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343 } |
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344 |
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345 TInt DMediaDriverNVMemory::Caps(TLocDrvRequest& m) |
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346 { |
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347 __DEBUG_PRINT("DMediaDriverNVMemory::Caps()"); |
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348 TLocalDriveCapsV6& caps=*(TLocalDriveCapsV6*)m.RemoteDes(); |
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349 caps.iType=EMediaHardDisk; |
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350 caps.iConnectionBusType=EConnectionBusInternal; |
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351 caps.iDriveAtt=KDriveAttLocal|KDriveAttInternal; |
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352 caps.iMediaAtt=KMediaAttFormattable; |
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353 caps.iFileSystemId=KDriveFileSysFAT; |
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354 caps.iPartitionType=KPartitionTypeFAT16; |
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355 caps.iSize=m.Drive()->iPartitionLen; |
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356 caps.iHiddenSectors=0; |
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357 caps.iEraseBlockSize = KNVMemTransferBufferSize; |
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358 caps.iBlockSize=KDiskSectorSize; |
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359 caps.iMaxBytesPerFormat = KNVMemTransferBufferSize; |
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360 |
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361 return KErrCompletion; |
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362 } |
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363 |
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364 TInt DMediaDriverNVMemory::Read() |
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365 { |
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366 __DEBUG_PRINT(">DMediaDriverNVMemory::Read() pos: %lx, size: %lx", iPos, iTotalLength); |
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367 // Set our sector offset |
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368 TUint32 transactionSectorOffset = (TUint32)(iPos / KDiskSectorSize); |
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369 TUint32 transactionLength = 0; |
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370 TUint32 transactionDirection = NVMEM_TRANSACTION_READ; |
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371 // Do we have an operation longer than our shared memory? |
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372 if( iSplitted > 0 ) |
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373 { |
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374 transactionLength = KNVMemTransferBufferSize; |
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375 } |
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376 else |
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377 { |
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378 // Do the whole operation in one go since we have enough room in our memory |
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379 transactionLength = I64LOW(iTotalLength); |
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380 // Read the "broken" tail sector |
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381 if( iTail ) |
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382 { |
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383 transactionLength += iTail; |
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384 iAlignmentOverhead += iTail; |
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385 } |
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386 } |
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387 // Read the "broken" head sector |
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388 if( iHead > 0 ) |
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389 { |
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390 transactionLength += iHead; |
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391 iAlignmentOverhead += iHead; |
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392 } |
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393 |
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394 // We should be ok to continue |
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395 ContinueTransaction( transactionSectorOffset, transactionLength/KDiskSectorSize, transactionDirection ); |
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396 __DEBUG_PRINT("<DMediaDriverNVMemory::Read()"); |
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397 return KErrNone; |
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398 } |
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399 |
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400 TInt DMediaDriverNVMemory::Write() |
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401 { |
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402 __DEBUG_PRINT("DMediaDriverNVMemory::Write() pos: 0x%lx, size: 0x%lx", iPos, iTotalLength); |
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403 TInt r = KErrNone; |
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404 // Set our sector offset |
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405 TUint32 transactionSectorOffset = (TUint32)(iPos / KDiskSectorSize); |
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406 TUint32 transactionLength = 0; |
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407 TUint32 transactionDirection = NVMEM_TRANSACTION_WRITE; |
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408 // Do we have an operation longer than our shared memory? |
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409 if( iSplitted > 0 ) |
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410 { |
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411 transactionLength = KNVMemTransferBufferSize; |
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412 } |
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413 else |
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414 { |
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415 // Do the whole operation in one go since we have enough room in our memory |
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416 transactionLength = I64LOW(iTotalLength); |
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417 if( iTail ) |
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418 { |
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419 iReadModifyWrite = ETrue; |
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420 // Read the "broken" tail sector |
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421 transactionLength += iTail; |
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422 iAlignmentOverhead += iTail; |
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423 } |
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424 } |
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425 // Is there a need to read modify write the "broken" head sector of the operation |
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426 if( iHead > 0 ) |
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427 { |
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428 iReadModifyWrite = ETrue; |
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429 // If splitted operation we only need the broken sector |
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430 if( iSplitted > 0 ) |
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431 { |
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432 transactionLength = KDiskSectorSize; |
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433 iAlignmentOverhead += iHead; |
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434 } |
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435 else |
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436 { |
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437 // Read the "broken" head sector in addition to everything else |
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438 transactionLength += iHead; |
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439 iAlignmentOverhead += iHead; |
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440 } |
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441 } |
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442 |
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443 // Was there a need to read-modify before writing |
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444 if( iReadModifyWrite ) |
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445 { |
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446 transactionDirection = NVMEM_TRANSACTION_READ; |
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447 } |
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448 else |
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449 { |
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450 // Handle format here |
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451 if( iCurrentRequest->Id() == DLocalDrive::EFormat ) |
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452 { |
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453 // Not much handling just flow through since we have filled the shared memory with zeroes already |
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454 } |
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455 else |
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456 { |
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457 // Read from client |
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458 TPtr8 targetDescriptor(iTransferBufferLin, transactionLength); |
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459 r = iCurrentRequest->ReadRemote(&targetDescriptor,0); |
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460 } |
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461 } |
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462 |
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463 // We should be ok to continue |
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464 ContinueTransaction( transactionSectorOffset, transactionLength/KDiskSectorSize, transactionDirection ); |
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465 |
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466 return r; |
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467 } |
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468 |
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469 |
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470 TInt DMediaDriverNVMemory::Format() |
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471 { |
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472 __DEBUG_PRINT("DMediaDriverNVMemory::Format() pos: 0x%lx, size: 0x%lx", iPos, iTotalLength); |
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473 memset( iTransferBufferLin, 0x00, KNVMemTransferBufferSize ); |
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474 // Stop the nonsense here. Write operations should be used for partial sector data removal operations |
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475 if( iHead > 0 || iTail > 0 ) |
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476 { |
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477 Kern::Fault("DMediaDriverNVMemory::Format: alignment violation!", 0); |
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478 } |
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479 Write(); |
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480 // DoTransaction( m, NVMEM_TRANSACTION_WRITE ); |
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481 return KErrNone; |
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482 } |
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483 |
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484 TInt DMediaDriverNVMemory::ContinueTransaction( TUint32 aTransactionSectorOffset, TUint32 aTransactionSectorCount, TUint32 aTransactionDirection ) |
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485 { |
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486 __DEBUG_PRINT("DMediaDriverNVMemory::ContinueTransaction() sectoroffset: %d, sectorcount: %d, direction: %d", aTransactionSectorOffset, aTransactionSectorCount, aTransactionDirection); |
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487 if( aTransactionDirection != NVMEM_TRANSACTION_UNDEFINED ) |
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488 { |
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489 WriteReg( KHwNVMemoryDevice, R_NVMEM_TRANSACTION_OFFSET, aTransactionSectorOffset ); |
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490 WriteReg( KHwNVMemoryDevice, R_NVMEM_TRANSACTION_SIZE, aTransactionSectorCount ); |
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491 WriteReg( KHwNVMemoryDevice, R_NVMEM_TRANSACTION_DIRECTION, aTransactionDirection ); |
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492 WriteReg( KHwNVMemoryDevice, R_NVMEM_TRANSACTION_EXECUTE, aTransactionDirection ); |
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493 } |
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494 else |
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495 { |
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496 Kern::Fault("DMediaDriverNVMemory::ContinueTransaction: Undefined transaction!", 0); |
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497 } |
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498 return KErrNone; |
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499 } |
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500 |
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501 |
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502 TInt DMediaDriverNVMemory::PartitionInfo(TPartitionInfo& anInfo) |
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503 // |
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504 // Return partition information on the media. |
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505 // |
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506 { |
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507 __DEBUG_PRINT("DMediaDriverNVMemory::PartitionInfo()"); |
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508 anInfo.iPartitionCount=1; |
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509 anInfo.iEntry[0].iPartitionBaseAddr=0; |
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510 anInfo.iEntry[0].iPartitionLen=anInfo.iMediaSizeInBytes=TotalSizeInBytes(); |
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511 anInfo.iEntry[0].iPartitionType=KPartitionTypeFAT16; |
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512 return KErrCompletion; |
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513 } |
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514 |
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515 void DMediaDriverNVMemory::TransactionLaunchDfc(TAny* aMediaDriver) |
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516 { |
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517 static_cast<DMediaDriverNVMemory*>(aMediaDriver)->DoTransactionLaunchDfc(); |
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518 } |
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519 |
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520 void DMediaDriverNVMemory::DoTransactionLaunchDfc() |
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521 { |
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522 __DEBUG_PRINT(">DMediaDriverNVMemory::DoTransactionLaunchDfc()"); |
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523 TInt request = iCurrentRequest->Id(); |
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524 TInt r(KErrNone); |
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525 switch (request) |
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526 { |
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527 case DLocalDrive::ERead: |
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528 r=Read(); |
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529 break; |
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530 case DLocalDrive::EWrite: |
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531 r=Write(); |
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532 break; |
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533 case DLocalDrive::EFormat: |
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534 r=Format(); |
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535 break; |
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536 case DLocalDrive::EEnlarge: |
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537 case DLocalDrive::EReduce: |
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538 default: |
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539 r=KErrNotSupported; |
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540 break; |
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541 } |
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542 if( r != KErrNone ) |
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543 { |
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544 // TODO some proper error handling here |
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545 } |
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546 __DEBUG_PRINT("<MediaDriverNVMemory::DoTransactionLaunchDfc %d",r); |
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547 } |
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548 |
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549 void DMediaDriverNVMemory::SessionEndDfc(TAny* aMediaDriver) |
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550 { |
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551 static_cast<DMediaDriverNVMemory*>(aMediaDriver)->DoSessionEndDfc(); |
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552 } |
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553 |
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554 void DMediaDriverNVMemory::DoSessionEndDfc() |
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555 { |
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556 __DEBUG_PRINT(">DMediaDriverNVMemory::DoSessionEndDfc()"); |
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557 TInt r = KErrNone; |
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558 // Check that we have a request in process |
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559 if( iCurrentRequest ) |
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560 { |
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561 // Transaction variables |
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562 TUint32 transactionSectorOffset(0); |
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563 TUint32 transactionLength(0); |
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564 TUint32 transactionDirection( NVMEM_TRANSACTION_UNDEFINED ); |
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565 // How much did we actually transfer? |
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566 TUint32 latestTransferSize = (iLatestTransferSectorCount * KDiskSectorSize); |
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567 __DEBUG_PRINT("DMediaDriverNVMemory::DoSessionEndDfc() latestTransferSize: %d", latestTransferSize ); |
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568 // Subtract alignment overhead |
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569 latestTransferSize = latestTransferSize - iAlignmentOverhead; |
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570 // For decision whether the buffer is ready for operation already |
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571 TBool bufferReady(EFalse); |
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572 // For decision whether we have finished the latest request |
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573 TBool sessionComplete(EFalse); |
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574 |
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575 // Was there a read-modify-write (RWM) for which we need to do some buffer manipulation before proceeding? |
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576 // Note that in case of format we triggered to alignment violation in earlier method already and can not enter to following |
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577 // condition when there is a format operation going on |
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578 if( iReadModifyWrite ) |
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579 { |
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580 bufferReady = ETrue; |
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581 iReadModifyWrite = EFalse; |
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582 // Was it a splitted operation for which we only need to take care of the broken head sector. |
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583 if( iSplitted > 0 ) |
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584 { |
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585 // We have a sector here here filled with data from mass memory. Modify with client data. |
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586 __DEBUG_PRINT("DMediaDriverNVMemory::DoSessionEndDfc() readremote splitted: %d head: %d", latestTransferSize, iHead ); |
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587 TPtr8 targetDescriptor(&iTransferBufferLin[iHead], KNVMemTransferBufferSize - iHead); |
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588 r = iCurrentRequest->ReadRemote(&targetDescriptor,0); |
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589 } |
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590 // Else we need to take care of both head and tail |
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591 else |
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592 { |
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593 // We have a piece of data read from mass memory. Modify with client data. |
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594 __DEBUG_PRINT("DMediaDriverNVMemory::DoSessionEndDfc() readremote: %d head: %d", I64LOW(iTotalLength - iProsessedLength), iHead ); |
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595 TPtr8 targetDescriptor(&iTransferBufferLin[iHead], I64LOW(iTotalLength - iProsessedLength)); |
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596 r = iCurrentRequest->ReadRemote(&targetDescriptor,0); |
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597 // latestTransferSize -= (KDiskSectorSize - iTail); |
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598 iTail = 0; |
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599 } |
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600 } |
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601 else |
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602 { |
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603 // Overhead is processed when we enter here |
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604 iAlignmentOverhead = 0; |
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605 // Update position |
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606 iPos += latestTransferSize; |
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607 // Save the information on how many bytes we transferred already |
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608 iProsessedLength += latestTransferSize; |
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609 // Update the splitted information. We don't take head into account here anymore since it is already taken care of |
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610 iSplitted = (iTotalLength - iProsessedLength + iTail) / KNVMemTransferBufferSize; |
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611 // Check if we have done already |
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612 if( iProsessedLength >= iTotalLength ) |
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613 { |
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614 // If this was the final transfer for this request let's take tail into account as well (if not taken already) |
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615 // iProsessedLength -= iTail; |
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616 // latestTransferSize -= iTail; |
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617 if( iProsessedLength > iTotalLength ) |
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618 { |
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619 Kern::Fault("DMediaDriverNVMemory: Illegal transfer operation!", 0); |
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620 } |
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621 sessionComplete = ETrue; |
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622 } |
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623 } |
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624 |
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625 TInt request = iCurrentRequest->Id(); |
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626 |
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627 // Set our sector offset |
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628 transactionSectorOffset = (TUint32)(iPos / KDiskSectorSize); |
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629 |
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630 if( bufferReady ) |
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631 { |
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632 // Write as much as we read in RMW operation |
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633 transactionLength = (iLatestTransferSectorCount * KDiskSectorSize); |
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634 } |
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635 else |
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636 { |
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637 // Do we have an operation longer than our shared memory? |
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638 if( iSplitted > 0 ) |
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639 { |
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640 transactionLength = KNVMemTransferBufferSize; |
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641 } |
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642 else |
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643 { |
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644 // Do the whole operation in one go since we have enough room in our memory |
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645 transactionLength = I64LOW(iTotalLength - iProsessedLength); |
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646 // Read the "broken" tail sector |
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647 if( iTail > 0 && request == DLocalDrive::EWrite ) |
|
648 { |
|
649 iReadModifyWrite = ETrue; |
|
650 // Read the "broken" tail sector |
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651 transactionLength += iTail; |
|
652 iAlignmentOverhead = iTail; |
|
653 } |
|
654 } |
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655 } |
|
656 |
|
657 // Was there a need to read-modify before writing |
|
658 if( iReadModifyWrite ) |
|
659 { |
|
660 transactionDirection = NVMEM_TRANSACTION_READ; |
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661 } |
|
662 else |
|
663 { |
|
664 if( request == DLocalDrive::ERead ) |
|
665 { |
|
666 transactionDirection = NVMEM_TRANSACTION_READ; |
|
667 // Write to client |
|
668 __DEBUG_PRINT("DMediaDriverNVMemory::DoSessionEndDfc() WriteRemote: %d head: %d", latestTransferSize, iHead ); |
|
669 TPtrC8 sourceDescriptor(&iTransferBufferLin[iHead], latestTransferSize); |
|
670 r = iCurrentRequest->WriteRemote( &sourceDescriptor, 0 ); |
|
671 } |
|
672 // Head is processed |
|
673 iHead = 0; |
|
674 if( request == DLocalDrive::EWrite && !sessionComplete ) |
|
675 { |
|
676 transactionDirection = NVMEM_TRANSACTION_WRITE; |
|
677 if( bufferReady ) |
|
678 { |
|
679 // Actually no need for any actions here |
|
680 } |
|
681 else |
|
682 { |
|
683 // Prepare a buffer for transfer |
|
684 __DEBUG_PRINT("DMediaDriverNVMemory::DoSessionEndDfc() ReadRemote: %d head: %d", latestTransferSize, iHead ); |
|
685 TPtr8 targetDescriptor(iTransferBufferLin, transactionLength); |
|
686 r = iCurrentRequest->ReadRemote(&targetDescriptor,0); |
|
687 } |
|
688 } |
|
689 if( request == DLocalDrive::EFormat ) |
|
690 { |
|
691 transactionDirection = NVMEM_TRANSACTION_WRITE; |
|
692 } |
|
693 } |
|
694 if( sessionComplete ) |
|
695 { |
|
696 CompleteRequest( r ); |
|
697 } |
|
698 else |
|
699 { |
|
700 ContinueTransaction( transactionSectorOffset, transactionLength/KDiskSectorSize, transactionDirection ); |
|
701 } |
|
702 } |
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703 else |
|
704 { |
|
705 // Let's just flow through for now |
|
706 } |
|
707 |
|
708 __DEBUG_PRINT("<DMediaDriverNVMemory::DoSessionEndDfc()" ); |
|
709 } |
|
710 |
|
711 |
|
712 TUint32 DMediaDriverNVMemory::GetNVMemSize( void ) |
|
713 { |
|
714 __DEBUG_PRINT("DMediaDriverNVMemory::GetNVMemSize()"); |
|
715 TUint32 sizeInSectors = ReadReg( KHwNVMemoryDevice, R_NVMEM_NV_MEMORY_SIZE ); |
|
716 return sizeInSectors; |
|
717 } |
|
718 |
|
719 void DMediaDriverNVMemory::Isr(TAny* aPtr) |
|
720 { |
|
721 __DEBUG_PRINT(">DMediaDriverNVMemory::Isr"); |
|
722 |
|
723 DMediaDriverNVMemory* nvMem = reinterpret_cast<DMediaDriverNVMemory*>(aPtr); |
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724 |
|
725 // Save the amount of transferred sectors. This clears the interrupt from HW as well |
|
726 nvMem->iLatestTransferSectorCount = ReadReg( KHwNVMemoryDevice, R_NVMEM_STATUS ); |
|
727 |
|
728 // Clear from framework |
|
729 Interrupt::Clear( EIntNVMemoryDevice ); |
|
730 |
|
731 nvMem->iSessionEndDfc.Add(); |
|
732 } |
|
733 |
|
734 |
|
735 DECLARE_EXTENSION_PDD() |
|
736 { |
|
737 __DEBUG_PRINT(">MediaDriverNVMemory create device"); |
|
738 return new DPhysicalDeviceMediaNVMemory; |
|
739 } |
|
740 |
|
741 static const TInt NVMemDriveNumbers[NVMEM1_DRIVECOUNT]={NVMEM1_DRIVELIST}; |
|
742 |
|
743 DECLARE_STANDARD_EXTENSION() |
|
744 { |
|
745 __DEBUG_PRINT("Registering NVMEM drive"); |
|
746 TInt r=KErrNoMemory; |
|
747 |
|
748 DPrimaryMediaBase* pM=new DPrimaryMediaBase; |
|
749 |
|
750 TDynamicDfcQue* NVMemoryDfcQ; |
|
751 |
|
752 r = Kern::DynamicDfcQCreate( NVMemoryDfcQ, KNVMemDfcThreadPriority, KNVMemDriveName ); |
|
753 |
|
754 if( r == KErrNone ) |
|
755 { |
|
756 pM->iDfcQ = NVMemoryDfcQ; |
|
757 } |
|
758 else |
|
759 { |
|
760 __DEBUG_PRINT("NVMEM DFCQ initialization failed"); |
|
761 } |
|
762 |
|
763 if (pM) |
|
764 { |
|
765 r=LocDrv::RegisterMediaDevice(EFixedMedia1,NVMEM1_DRIVECOUNT,&NVMemDriveNumbers[0],pM,NVMEM1_NUMMEDIA,KNVMemDriveName); |
|
766 } |
|
767 |
|
768 pM->iMsgQ.Receive(); |
|
769 |
|
770 __DEBUG_PRINT("Registering NVMEM drive - return %d",r); |
|
771 |
|
772 return r; |
|
773 } |