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1 /* |
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2 * ============================================================================= |
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3 * Name : virtualvideohwinterface.cpp |
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4 * Part of : |
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5 * Description : Implementation file for the class DVirtualVideoHwInterface. |
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6 * Version : %version:3 % |
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7 * |
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8 * Copyright © 2002-2009 Nokia. All rights reserved. |
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9 * This material, including documentation and any related |
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10 * computer programs, is protected by copyright controlled by |
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11 * Nokia. All rights are reserved. Copying, including |
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12 * reproducing, storing, adapting or translating, any |
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13 * or all of this material requires the prior written consent of |
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14 * Nokia. This material also contains confidential |
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15 * information which may not be disclosed to others without the |
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16 * prior written consent of Nokia. |
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17 * ============================================================================= |
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18 */ |
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19 |
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20 |
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21 // INCLUDE FILES |
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22 #include <platform.h> |
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23 #include <kern_priv.h> |
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24 |
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25 #include "virtualvideointerfaceconstants.h" |
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26 #include "virtualvideohwinterface.h" |
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27 #include "virtualvideotracing.h" |
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28 |
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29 |
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30 // CONSTANTS |
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31 |
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32 _LIT( KVirtualVideoHwInterfacePanic, "DVirtualVideoHwInterface" ); |
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33 |
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34 // ============================ LOCAL DATA TYPES =============================== |
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35 |
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36 // Register offsets for playback and recording channels |
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37 // Note: The orders of these must match the order of enumarations |
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38 const TLinAddr KRegisterOffsets[] = |
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39 { |
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40 VVI_R_ID, |
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41 VVI_R_IRQ_ENABLE, |
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42 VVI_R_IRQ_STATUS, |
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43 VVI_R_COMMAND, |
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44 VVI_R_PARAMETER_LOAD, |
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45 VVI_R_ERROR, |
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46 VVI_R_INPUT_BUFFER_TAIL, |
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47 VVI_R_INPUT_BUFFER_HEAD, |
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48 VVI_R_INPUT_BUFFER_READ_COUNT, |
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49 VVI_R_INPUT_BUFFER_WRITE_COUNT, |
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50 VVI_R_INPUT_BUFFER_MAX_TAIL, |
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51 VVI_R_REQUEST_ID |
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52 }; |
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53 #define ASSERT_PANIC(c,p) __ASSERT_DEBUG(c,Kern::PanicCurrentThread(KVirtualVideoHwInterfacePanic,p)); |
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54 |
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55 // ============================ LOCAL FUNCTIONS ================================ |
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56 |
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57 // Get register offset for certain register range and register |
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58 inline TLinAddr RegisterOffset( DVirtualVideoHwInterface::TRegister aRegister ) |
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59 { |
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60 return KRegisterOffsets[aRegister]; |
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61 } |
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62 |
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63 // ============================ MEMBER FUNCTIONS =============================== |
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64 |
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65 // ----------------------------------------------------------------------------- |
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66 // DVirtualVideoHwInterface::DVirtualVideoHwInterface |
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67 // ----------------------------------------------------------------------------- |
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68 // |
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69 DVirtualVideoHwInterface::DVirtualVideoHwInterface() |
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70 { |
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71 iInputParametersMemoryChunk = NULL; |
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72 iOutputParametersMemoryChunk = NULL; |
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73 iRegisterMemoryChunk = NULL; |
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74 } |
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75 |
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76 |
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77 // ----------------------------------------------------------------------------- |
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78 // DVirtualVideoHwInterface::~DVirtualVideoHwInterface |
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79 // ----------------------------------------------------------------------------- |
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80 // |
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81 DVirtualVideoHwInterface::~DVirtualVideoHwInterface() |
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82 { |
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83 // Enter critical section |
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84 NKern::ThreadEnterCS(); |
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85 |
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86 if ( iInputParametersMemoryChunk ) |
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87 { |
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88 Kern::ChunkClose( iInputParametersMemoryChunk ); |
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89 } |
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90 |
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91 if ( iOutputParametersMemoryChunk ) |
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92 { |
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93 Kern::ChunkClose( iOutputParametersMemoryChunk ); |
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94 } |
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95 |
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96 if ( iRegisterMemoryChunk ) |
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97 { |
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98 Kern::ChunkClose( iRegisterMemoryChunk ); |
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99 } |
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100 |
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101 iInputParametersMemoryChunk = NULL; |
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102 iOutputParametersMemoryChunk = NULL; |
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103 iRegisterMemoryChunk = NULL; |
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104 |
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105 // Leave critical section |
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106 NKern::ThreadLeaveCS(); |
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107 } |
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108 |
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109 TInt DVirtualVideoHwInterface::InitParametersInputMemory() |
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110 { |
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111 return InitPhysicalMemory( VVI_PARAMETERS_INPUT_BASE_ADDRESS, |
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112 VVI_PARAMETERS_INPUT_MEMORY_SIZE, iInputParametersMemoryChunk, |
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113 iInputParametersChunkKernelAddress ); |
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114 } |
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115 |
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116 TInt DVirtualVideoHwInterface::InitParametersOutputMemory() |
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117 { |
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118 return InitPhysicalMemory( VVI_PARAMETERS_OUTPUT_BASE_ADDRESS, |
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119 VVI_PARAMETERS_OUTPUT_MEMORY_SIZE, iOutputParametersMemoryChunk, |
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120 iOutputParametersChunkKernelAddress ); |
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121 } |
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122 |
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123 TInt DVirtualVideoHwInterface::InitRegisterMemory() |
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124 { |
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125 return InitPhysicalMemory( VVI_REGISTERS_BASE_ADDRESS, |
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126 VVI_REGISTERS_MEMORY_SIZE, iRegisterMemoryChunk, |
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127 iRegisterChunkKernelAddress ); |
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128 } |
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129 |
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130 // ----------------------------------------------------------------------------- |
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131 // DVirtualVideoHwInterface::InitPhysicalMemory |
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132 // ----------------------------------------------------------------------------- |
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133 // |
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134 TInt DVirtualVideoHwInterface::InitPhysicalMemory( TUint32 aPhysicalAddress, |
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135 TInt aMaxSize, DChunk*& aChunk, TLinAddr& aLinAddr ) |
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136 { |
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137 TInt error = KErrNoMemory; |
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138 TChunkCreateInfo info; |
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139 info.iType = TChunkCreateInfo::ESharedKernelSingle; |
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140 info.iMaxSize = aMaxSize; |
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141 info.iMapAttr = EMapAttrFullyBlocking; |
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142 info.iOwnsMemory = EFalse; |
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143 info.iDestroyedDfc = NULL; |
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144 DChunk* chunk = NULL; |
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145 TUint32 mapAttr = 0; |
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146 TLinAddr chunkKernelAddress = 0; |
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147 |
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148 // Enter critical section while creating the chunk and commiting memory |
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149 NKern::ThreadEnterCS(); |
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150 |
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151 error = Kern::ChunkCreate( info, chunk, chunkKernelAddress, mapAttr ); |
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152 if ( !error ) |
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153 { |
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154 error = Kern::ChunkCommitPhysical( |
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155 chunk, 0, aMaxSize, aPhysicalAddress ); |
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156 if ( error ) |
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157 { |
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158 Kern::ChunkClose( chunk ); |
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159 } |
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160 else |
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161 { |
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162 // Physical memory has been successfully committed to chunk |
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163 aChunk = chunk; |
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164 aLinAddr = chunkKernelAddress; |
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165 } |
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166 } |
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167 chunk = NULL; |
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168 |
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169 // Leave critical section |
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170 NKern::ThreadLeaveCS(); |
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171 |
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172 VVHW_TRACE("DVirtualVideoHwInterface::InitPhysicalMemory return %d", error); |
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173 return error; |
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174 } |
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175 |
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176 // ----------------------------------------------------------------------------- |
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177 // ----------------------------------------------------------------------------- |
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178 // DVirtualVideoHwInterface::EnableInterrupts |
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179 // ----------------------------------------------------------------------------- |
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180 // |
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181 void DVirtualVideoHwInterface::EnableInterrupts( TUint32 aInterruptBitField ) |
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182 { |
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183 SetRegisterValue( ERegIrqEnable, aInterruptBitField ); |
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184 } |
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185 |
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186 |
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187 // ----------------------------------------------------------------------------- |
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188 // DVirtualVideoHwInterface::GetInterruptEnabledState |
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189 // ----------------------------------------------------------------------------- |
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190 // |
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191 void DVirtualVideoHwInterface::GetInterruptEnabledState( TUint32& aInterruptBitField ) |
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192 { |
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193 GetRegisterValue( ERegIrqEnable, aInterruptBitField ); |
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194 } |
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195 |
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196 |
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197 // ----------------------------------------------------------------------------- |
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198 // DVirtualVideoHwInterface::GetInterruptStatus |
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199 // ----------------------------------------------------------------------------- |
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200 // |
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201 void DVirtualVideoHwInterface::GetInterruptStatus( TUint32& aInterruptBitField ) |
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202 { |
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203 GetRegisterValue( ERegIrqStatus, aInterruptBitField ); |
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204 } |
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205 |
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206 |
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207 // ----------------------------------------------------------------------------- |
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208 // DVirtualVideoHwInterface::ResetInterruptStatus |
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209 // ----------------------------------------------------------------------------- |
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210 // |
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211 void DVirtualVideoHwInterface::ResetInterruptStatus( TUint32 aInterruptBitField ) |
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212 { |
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213 SetRegisterValue( ERegIrqStatus, aInterruptBitField ); |
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214 } |
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215 |
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216 |
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217 // DVirtualVideoHwInterface::IssueCommand |
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218 // ----------------------------------------------------------------------------- |
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219 // |
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220 void DVirtualVideoHwInterface::IssueCommand( TUint32 aCommand ) |
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221 { |
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222 SetRegisterValue( ERegCommand, aCommand ); |
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223 } |
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224 |
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225 // ----------------------------------------------------------------------------- |
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226 // DVirtualVideoHwInterface::GetRegisterValue |
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227 // ----------------------------------------------------------------------------- |
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228 // |
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229 void DVirtualVideoHwInterface::GetRegisterValue( |
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230 TRegister aRegister, |
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231 TUint32& aValue ) |
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232 { |
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233 if ( iRegisterMemoryChunk ) |
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234 { |
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235 TLinAddr offset = RegisterOffset( aRegister ); |
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236 TUint32* ptr = reinterpret_cast<TUint32*>( iRegisterChunkKernelAddress + offset ); |
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237 aValue = *ptr; |
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238 } |
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239 else |
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240 { |
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241 Kern::PanicCurrentThread( KVirtualVideoHwInterfacePanic, KErrNotReady ); |
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242 } |
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243 } |
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244 |
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245 |
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246 // ----------------------------------------------------------------------------- |
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247 // DVirtualVideoHwInterface::SetRegisterValue |
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248 // ----------------------------------------------------------------------------- |
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249 // |
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250 void DVirtualVideoHwInterface::SetRegisterValue( |
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251 TRegister aRegister, |
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252 TUint32 aValue ) |
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253 { |
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254 if ( iRegisterMemoryChunk ) |
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255 { |
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256 TLinAddr offset = RegisterOffset( aRegister ); |
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257 TUint32* ptr = reinterpret_cast<TUint32*>( iRegisterChunkKernelAddress + offset ); |
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258 *ptr = aValue; |
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259 } |
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260 else |
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261 { |
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262 Kern::PanicCurrentThread( KVirtualVideoHwInterfacePanic, KErrNotReady ); |
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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 // End of file |