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1 // Copyright (c) 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 the License "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 // Partition Management for Embedded MMC devices |
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15 // |
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16 // |
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17 |
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18 #include <drivers/emmcptn.h> |
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19 |
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20 const TInt KDiskSectorShift=9; |
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21 |
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22 class DLegacyEMMCPartitionInfo : public DEMMCPartitionInfo |
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23 { |
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24 public: |
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25 DLegacyEMMCPartitionInfo(); |
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26 ~DLegacyEMMCPartitionInfo(); |
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27 public: |
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28 virtual TInt Initialise(DMediaDriver* aDriver); |
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29 virtual TInt PartitionInfo(TPartitionInfo& anInfo, const TMMCCallBack& aCallBack); |
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30 virtual TInt PartitionCaps(TLocDrv& aDrive, TDes8& aInfo); |
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31 |
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32 protected: |
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33 void SetPartitionEntry(TPartitionEntry* aEntry, TUint aFirstSector, TUint aNumSectors); |
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34 |
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35 private: |
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36 static void SessionEndCallBack(TAny* aSelf); |
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37 void DoSessionEndCallBack(); |
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38 virtual TInt DecodePartitionInfo(); |
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39 |
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40 protected: |
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41 DMediaDriver* iDriver; |
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42 TPartitionInfo* iPartitionInfo; |
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43 TMMCCallBack iSessionEndCallBack; |
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44 TMMCCallBack iCallBack; // Where to report the PartitionInfo completion |
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45 DMMCSession* iSession; |
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46 TMMCard* iCard; |
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47 TUint8* iIntBuf; |
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48 }; |
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49 |
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50 DLegacyEMMCPartitionInfo::DLegacyEMMCPartitionInfo() |
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51 : iSessionEndCallBack(DLegacyEMMCPartitionInfo::SessionEndCallBack, this) |
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52 { |
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53 } |
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54 |
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55 DLegacyEMMCPartitionInfo::~DLegacyEMMCPartitionInfo() |
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56 { |
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57 delete iSession; |
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58 } |
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59 |
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60 TInt DLegacyEMMCPartitionInfo::Initialise(DMediaDriver* aDriver) |
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61 { |
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62 iDriver = aDriver; |
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63 |
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64 DMMCSocket* socket = ((DMMCSocket*)((DPBusPrimaryMedia*)(iDriver->iPrimaryMedia))->iSocket); |
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65 if(socket == NULL) |
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66 return(KErrNoMemory); |
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67 |
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68 DMMCStack* stack = socket->Stack(0); |
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69 iCard = stack->CardP(((DPBusPrimaryMedia*)(iDriver->iPrimaryMedia))->iSlotNumber); |
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70 |
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71 iSession = stack->AllocSession(iSessionEndCallBack); |
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72 if (iSession == NULL) |
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73 return(KErrNoMemory); |
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74 |
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75 iSession->SetStack(stack); |
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76 iSession->SetCard(iCard); |
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77 |
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78 // this gets used before any access |
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79 TInt bufLen, minorBufLen; |
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80 stack->BufferInfo(iIntBuf, bufLen, minorBufLen); |
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81 |
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82 return(KErrNone); |
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83 } |
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84 |
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85 TInt DLegacyEMMCPartitionInfo::PartitionInfo(TPartitionInfo& anInfo, const TMMCCallBack& aCallBack) |
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86 { |
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87 iPartitionInfo = &anInfo; |
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88 iCallBack = aCallBack; |
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89 // If media driver is persistent (see EMediaDriverPersistent), |
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90 // the card may have changed since last power down, so reset CID |
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91 iSession->SetCard(iCard); |
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92 |
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93 iSession->SetupCIMReadBlock(0, iIntBuf); |
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94 |
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95 TInt r = iDriver->InCritical(); |
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96 if (r == KErrNone) |
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97 r = iSession->Engage(); |
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98 |
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99 if(r != KErrNone) |
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100 iDriver->EndInCritical(); |
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101 |
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102 return(r); |
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103 } |
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104 |
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105 TInt DLegacyEMMCPartitionInfo::PartitionCaps(TLocDrv& aDrive, TDes8& aInfo) |
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106 { |
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107 TLocalDriveCapsV6Buf& Info = static_cast< TLocalDriveCapsV6Buf&> (aInfo); |
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108 |
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109 // is this query for the swap partition ? |
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110 if (aDrive.iPartitionType == KPartitionTypePagedData) |
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111 { |
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112 Info().iFileSystemId = KDriveFileNone; |
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113 Info().iDriveAtt|= KDriveAttHidden; |
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114 } |
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115 |
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116 // is this query for the ROFS partition ? |
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117 if (aDrive.iPartitionType == KPartitionTypeRofs) |
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118 { |
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119 Info().iFileSystemId = KDriveFileSysROFS; |
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120 Info().iMediaAtt&= ~KMediaAttFormattable; |
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121 Info().iMediaAtt|= KMediaAttWriteProtected; |
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122 } |
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123 |
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124 // is this query for the ROM partition ? |
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125 if (aDrive.iPartitionType == KPartitionTypeROM) |
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126 { |
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127 Info().iFileSystemId = KDriveFileNone; |
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128 Info().iMediaAtt&= ~KMediaAttFormattable; |
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129 Info().iMediaAtt|= KMediaAttWriteProtected; |
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130 } |
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131 |
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132 return KErrNone; |
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133 } |
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134 |
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135 void DLegacyEMMCPartitionInfo::SessionEndCallBack(TAny* aSelf) |
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136 { |
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137 DLegacyEMMCPartitionInfo& self = *static_cast<DLegacyEMMCPartitionInfo*>(aSelf); |
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138 self.DoSessionEndCallBack(); |
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139 } |
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140 |
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141 void DLegacyEMMCPartitionInfo::DoSessionEndCallBack() |
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142 { |
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143 iDriver->EndInCritical(); |
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144 |
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145 TInt r = iSession->EpocErrorCode(); |
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146 |
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147 if (r == KErrNone) |
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148 r = DecodePartitionInfo(); |
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149 |
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150 iDriver->PartitionInfoComplete(r == KErrNone ? r : KErrNotReady); |
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151 } |
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152 |
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153 TInt DLegacyEMMCPartitionInfo::DecodePartitionInfo() |
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154 // |
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155 // decode partition info that was read into internal buffer |
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156 // |
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157 { |
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158 TUint partitionCount=iPartitionInfo->iPartitionCount=0; |
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159 TInt defaultPartitionNumber=-1; |
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160 TMBRPartitionEntry* pe; |
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161 const TUint KMBRFirstPartitionOffsetAligned = KMBRFirstPartitionOffset & ~3; |
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162 TInt i; |
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163 |
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164 // Read of the first sector successful so check for a Master Boot Record |
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165 if (*(TUint16*)(&iIntBuf[KMBRSignatureOffset])!=0xAA55) |
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166 // If no valid signature give up now, No way to re-format an internal drive correctly |
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167 return KErrCorrupt; |
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168 |
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169 __ASSERT_COMPILE(KMBRFirstPartitionOffsetAligned + KMBRMaxPrimaryPartitions * sizeof(TMBRPartitionEntry) <= KMBRSignatureOffset); |
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170 |
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171 memmove(&iIntBuf[0], &iIntBuf[2], |
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172 KMBRFirstPartitionOffsetAligned + KMBRMaxPrimaryPartitions * sizeof(TMBRPartitionEntry)); |
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173 |
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174 |
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175 for (i=0, pe = (TMBRPartitionEntry*)(&iIntBuf[KMBRFirstPartitionOffsetAligned]); |
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176 pe->iPartitionType != 0 && i < KMaxPartitionEntries; i++,pe--) |
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177 { |
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178 if (pe->IsDefaultBootPartition()) |
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179 { |
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180 SetPartitionEntry(&iPartitionInfo->iEntry[0],pe->iFirstSector,pe->iNumSectors); |
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181 defaultPartitionNumber=i; |
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182 partitionCount++; |
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183 break; |
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184 } |
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185 } |
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186 |
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187 // Now add any other partitions |
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188 for (i=0, pe = (TMBRPartitionEntry*)(&iIntBuf[KMBRFirstPartitionOffsetAligned]); |
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189 pe->iPartitionType != 0 && i < KMaxPartitionEntries; i++,pe--) |
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190 { |
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191 if (defaultPartitionNumber==i) |
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192 { |
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193 // Already sorted |
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194 } |
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195 |
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196 // FAT partition ? |
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197 else if (pe->IsValidDosPartition() || pe->IsValidFAT32Partition()) |
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198 { |
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199 SetPartitionEntry(&iPartitionInfo->iEntry[partitionCount],pe->iFirstSector,pe->iNumSectors); |
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200 __KTRACE_OPT(KLOCDPAGING, Kern::Printf("Mmc: FAT partition found at sector #%u", pe->iFirstSector)); |
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201 partitionCount++; |
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202 } |
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203 |
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204 else if (pe->iPartitionType == KPartitionTypeROM) |
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205 { |
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206 TPartitionEntry& partitionEntry = iPartitionInfo->iEntry[partitionCount]; |
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207 SetPartitionEntry(&iPartitionInfo->iEntry[partitionCount],pe->iFirstSector,pe->iNumSectors); |
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208 partitionEntry.iPartitionType = pe->iPartitionType; |
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209 partitionCount++; |
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210 |
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211 __KTRACE_OPT(KLOCDPAGING, Kern::Printf("Mmc: KPartitionTypeROM found at sector #%u", pe->iFirstSector)); |
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212 } |
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213 |
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214 // ROFS partition ? |
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215 else if (pe->iPartitionType == KPartitionTypeRofs) |
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216 { |
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217 |
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218 // Don't expose this for normal operation only boot? |
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219 TPartitionEntry& partitionEntry = iPartitionInfo->iEntry[partitionCount]; |
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220 SetPartitionEntry(&iPartitionInfo->iEntry[partitionCount],pe->iFirstSector,pe->iNumSectors); |
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221 partitionEntry.iPartitionType = pe->iPartitionType; |
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222 __KTRACE_OPT(KLOCDPAGING, Kern::Printf("Mmc: KPartitionTypeRofs found at sector #%u", pe->iFirstSector)); |
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223 partitionCount++; |
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224 } |
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225 |
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226 // Swap partition ? |
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227 else if (pe->iPartitionType == KPartitionTypePagedData) |
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228 { |
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229 __KTRACE_OPT(KLOCDPAGING, Kern::Printf("Mmc: KPartitionTypePagedData found at sector #%u", pe->iFirstSector)); |
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230 |
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231 TPartitionEntry& partitionEntry = iPartitionInfo->iEntry[partitionCount]; |
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232 SetPartitionEntry(&iPartitionInfo->iEntry[partitionCount],pe->iFirstSector,pe->iNumSectors); |
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233 partitionEntry.iPartitionType = pe->iPartitionType; |
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234 partitionCount++; |
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235 } |
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236 } |
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237 |
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238 // Check the validity of the partition address boundaries |
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239 // If there is any MBR errors |
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240 if(partitionCount > 0) |
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241 { |
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242 const TInt64 deviceSize = iCard->DeviceSize64(); |
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243 TPartitionEntry& part = iPartitionInfo->iEntry[partitionCount - 1]; |
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244 // Check that the card address space boundary is not exceeded by the last partition |
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245 if(part.iPartitionBaseAddr + part.iPartitionLen > deviceSize) |
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246 { |
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247 __KTRACE_OPT(KPBUSDRV, Kern::Printf("Mmc: MBR partition exceeds card memory space")); |
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248 return KErrCorrupt; |
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249 } |
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250 |
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251 // More than one partition. Go through all of them |
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252 if (partitionCount > 0) |
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253 { |
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254 for(i=partitionCount-1; i>0; i--) |
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255 { |
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256 const TPartitionEntry& curr = iPartitionInfo->iEntry[i]; |
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257 TPartitionEntry& prev = iPartitionInfo->iEntry[i-1]; |
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258 // Check if partitions overlap |
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259 if(curr.iPartitionBaseAddr < (prev.iPartitionBaseAddr + prev.iPartitionLen)) |
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260 { |
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261 __KTRACE_OPT(KPBUSDRV, Kern::Printf("Mmc: Overlapping partitions")); |
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262 return KErrCorrupt; |
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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 if (defaultPartitionNumber==(-1) && partitionCount==0) |
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269 { |
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270 __KTRACE_OPT(KPBUSDRV, Kern::Printf("No Valid Partitions Found!")); |
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271 return KErrCorrupt; |
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272 } |
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273 |
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274 iPartitionInfo->iPartitionCount=partitionCount; |
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275 iPartitionInfo->iMediaSizeInBytes=iCard->DeviceSize64(); |
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276 |
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277 #ifdef _DEBUG |
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278 __KTRACE_OPT(KPBUSDRV, Kern::Printf("<Mmc:PartitionInfo (C:%d)",partitionCount)); |
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279 for (TUint x=0; x<partitionCount; x++) |
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280 __KTRACE_OPT(KPBUSDRV, Kern::Printf(" Partition%d (B:%xH L:%xH)",x,I64LOW(iPartitionInfo->iEntry[x].iPartitionBaseAddr),I64LOW(iPartitionInfo->iEntry[x].iPartitionLen))); |
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281 #endif |
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282 |
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283 //Notify medmmc that partitioninfo is complete. |
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284 iCallBack.CallBack(); |
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285 |
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286 return(KErrNone); |
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287 } |
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288 |
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289 |
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290 void DLegacyEMMCPartitionInfo::SetPartitionEntry(TPartitionEntry* aEntry, TUint aFirstSector, TUint aNumSectors) |
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291 // |
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292 // auxiliary static function to record partition information in TPartitionEntry object |
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293 // |
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294 { |
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295 aEntry->iPartitionBaseAddr=aFirstSector; |
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296 aEntry->iPartitionBaseAddr<<=KDiskSectorShift; |
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297 aEntry->iPartitionLen=aNumSectors; |
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298 aEntry->iPartitionLen<<=KDiskSectorShift; |
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299 aEntry->iPartitionType=KPartitionTypeFAT12; |
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300 } |
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301 |
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302 // End - DLegacyEMMCPartitionInfo |
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303 |
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304 |
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305 EXPORT_C DEMMCPartitionInfo* CreateEmmcPartitionInfo() |
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306 { |
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307 return new DLegacyEMMCPartitionInfo; |
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308 } |
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309 |
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310 DECLARE_STANDARD_EXTENSION() |
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311 { |
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312 return KErrNone; |
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313 } |