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 |
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5 This program and the accompanying materials are made available |
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6 under the terms of the Eclipse Public License v1.0 which accompanies |
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7 this distribution, and is available at |
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8 http://www.eclipse.org/legal/epl-v10.html |
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9 |
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10 Initial Contributors: |
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11 Nokia Corporation - initial contribution. |
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12 |
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13 Contributors: |
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14 */ |
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15 |
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16 #include "controltransfersm.h" |
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17 |
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18 // Bitmap of setup packet |
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19 /* |
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20 Offset 0, bmRequestType, 1 bytes |
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21 1 Bit-Map |
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22 D7 Data Phase Transfer Direction |
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23 0 = Host to Device |
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24 1 = Device to Host |
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25 |
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26 D6..5 Type |
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27 0 = Standard |
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28 1 = Class |
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29 2 = Vendor |
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30 3 = Reserved |
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31 |
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32 D4..0 Recipient |
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33 0 = Device |
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34 1 = Interface |
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35 2 = Endpoint |
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36 3 = Other |
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37 4..31 = Reserved |
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38 |
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39 Offset 1, bRequest |
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40 |
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41 Offset 6, Count, 2 bytes |
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42 Number of bytes to transfer if there is a data phase |
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43 */ |
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44 |
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45 #if defined(_DEBUG) |
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46 |
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47 #define CTSM_ID "ControlTransferSM " |
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48 |
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49 char* DebugName[] = |
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50 { |
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51 "Setup", |
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52 "Data Out", |
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53 "Status In", |
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54 "Data In", |
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55 "Status Out" |
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56 }; |
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57 |
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58 #endif |
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59 |
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60 // Static data instance |
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61 TUsbcSetup TSetupPkgParser::iSetupPkt; |
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62 |
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63 TSetupPkgParser::TSetupPkgParser() |
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64 { |
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65 iSetupPkt.iRequestType = 0; |
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66 iSetupPkt.iRequest = 0; |
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67 |
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68 iSetupPkt.iValue = 0; |
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69 iSetupPkt.iIndex = 0; |
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70 iSetupPkt.iLength = 0; |
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71 } |
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72 |
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73 // Code for TSetupPkgParser |
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74 // we do a bitwise copy here. |
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75 void TSetupPkgParser::Set(const TUint8* aSetupBuf) |
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76 { |
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77 // TUint8 index |
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78 iSetupPkt.iRequestType = static_cast<const TUint8*>(aSetupBuf)[0]; |
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79 iSetupPkt.iRequest = static_cast<const TUint8*>(aSetupBuf)[1]; |
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80 // TUint16 index from here! |
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81 iSetupPkt.iValue = SWAP_BYTES_16((reinterpret_cast<const TUint16*>(aSetupBuf))[1]); |
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82 iSetupPkt.iIndex = SWAP_BYTES_16((reinterpret_cast<const TUint16*>(aSetupBuf))[2]); |
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83 iSetupPkt.iLength = SWAP_BYTES_16((reinterpret_cast<const TUint16*>(aSetupBuf))[3]); |
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84 |
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85 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "TSetupPkgParser::Set")); |
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86 } |
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87 |
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88 // return the next stage by decoding the setup packet |
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89 // the possible stage followed by a setup packet are: |
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90 // StatusIn (no data stage) |
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91 // DataOut (host sent to peripheral) |
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92 // DataIn (peripheral to host) |
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93 UsbShai::TControlStage TSetupPkgParser::NextStage() |
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94 { |
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95 UsbShai::TControlStage ret = UsbShai::EControlTransferStageMax; |
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96 |
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97 // Take the data length out, 0 length means no data stage |
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98 if (iSetupPkt.iLength == 0) |
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99 { |
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100 ret = UsbShai::EControlTransferStageStatusIn; |
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101 } |
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102 else if ((iSetupPkt.iRequestType & KUsbRequestType_DirMask) == KUsbRequestType_DirToDev) |
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103 { |
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104 // Dir to device means host will send data out |
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105 ret = UsbShai::EControlTransferStageDataOut; |
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106 } |
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107 else |
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108 { |
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109 // Otherwise, there must be a datain stage follows |
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110 ret = UsbShai::EControlTransferStageDataIn; |
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111 } |
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112 |
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113 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "TSetupPkgParser::NextStage %d", ret)); |
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114 |
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115 return ret; |
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116 } |
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117 |
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118 // Base class of stage sm |
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119 TControlStageSm::TControlStageSm(DControlTransferManager& aTransferMgr): |
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120 iTransferMgr(aTransferMgr) |
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121 { |
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122 } |
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123 |
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124 void TControlStageSm::ChangeToStage(UsbShai::TControlStage aToStage) |
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125 { |
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126 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "<> TControlStageSm::ChangeToStage: %s",DebugName[aToStage])); |
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127 iTransferMgr.iCurrentStage = aToStage; |
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128 } |
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129 |
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130 void TControlStageSm::ClearPendingRead() |
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131 { |
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132 iTransferMgr.iReadPending = EFalse; |
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133 } |
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134 |
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135 // Code for DControlTransferManager |
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136 // |
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137 |
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138 DControlTransferManager::DControlTransferManager(MControlTransferIf& aCtrTransIf): |
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139 iCtrTransferIf(aCtrTransIf) |
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140 { |
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141 for(int i=0; i<UsbShai::EControlTransferStageMax; i++) |
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142 { |
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143 iState[i] = NULL; |
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144 } |
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145 |
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146 Reset(); |
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147 } |
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148 |
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149 TInt DControlTransferManager::SetupEndpointZeroRead() |
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150 { |
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151 if(iState[iCurrentStage]->IsRequstAllowed(TControlTransferRequestRead)) |
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152 { |
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153 if(!iReadPending) |
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154 { |
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155 iReadPending = ETrue; |
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156 return CtrTransferIf().ProcessSetupEndpointZeroRead(); |
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157 } |
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158 else |
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159 { |
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160 // A read operation already on going, ignore this request |
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161 return KErrNone; |
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162 } |
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163 } |
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164 else |
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165 { |
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166 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID " !! SetupEndpointZeroRead discard")); |
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167 return KErrNotReady; |
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168 } |
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169 } |
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170 |
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171 TInt DControlTransferManager::SetupEndpointZeroWrite(const TUint8* aBuffer, TInt aLength, TBool aZlpReqd) |
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172 { |
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173 if(iState[iCurrentStage]->IsRequstAllowed(TControlTransferRequestWrite)) |
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174 { |
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175 return CtrTransferIf().ProcessSetupEndpointZeroWrite(aBuffer,aLength,aZlpReqd); |
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176 } |
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177 else |
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178 { |
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179 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID " !! SetupEndpointZeroWrite discard")); |
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180 return KErrNotReady; |
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181 } |
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182 } |
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183 |
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184 TInt DControlTransferManager::SendEp0ZeroByteStatusPacket() |
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185 { |
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186 if(iState[iCurrentStage]->IsRequstAllowed(TControlTransferRequestSendStatus)) |
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187 { |
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188 iCurrentStage = UsbShai::EControlTransferStageSetup; |
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189 return CtrTransferIf().ProcessSendEp0ZeroByteStatusPacket(); |
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190 } |
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191 else |
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192 { |
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193 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID " !! SendEp0ZeroByteStatusPacket discard")); |
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194 return KErrNotReady; |
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195 } |
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196 } |
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197 |
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198 TInt DControlTransferManager::StallEndpoint(TInt aRealEndpoint) |
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199 { |
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200 // Endpoint is stalled, we need to reset our state machine. |
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201 Reset(); |
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202 return CtrTransferIf().ProcessStallEndpoint(aRealEndpoint); |
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203 } |
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204 |
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205 void DControlTransferManager::Ep0SetupPacketProceed() |
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206 { |
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207 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID " !! Missed setup packet processed")); |
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208 CtrTransferIf().ProcessEp0SetupPacketProceed(); |
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209 } |
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210 |
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211 void DControlTransferManager::Ep0DataPacketProceed() |
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212 { |
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213 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID " !! Missed data packet processed")); |
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214 CtrTransferIf().ProcessEp0DataPacketProceed(); |
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215 } |
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216 |
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217 void DControlTransferManager::Reset() |
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218 { |
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219 iCurrentStage = UsbShai::EControlTransferStageSetup; |
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220 iReadPending = EFalse; |
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221 } |
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222 |
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223 void DControlTransferManager::Ep0RequestComplete(TUint8* aBuf, |
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224 TInt aCount, |
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225 TInt aError, |
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226 UsbShai::TControlPacketType aPktType) |
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227 { |
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228 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "> DControlTransferManager::Ep0RequestComplete, packet type: %s", DebugName[aPktType])); |
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229 // If a setup packet comes, update our local setup packet buffer first |
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230 if(aPktType == UsbShai::EControlPacketTypeSetup) |
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231 { |
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232 iPacketParser.Set(aBuf); |
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233 // This is the only place this variable to be reset. |
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234 iDataTransfered = 0; |
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235 } |
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236 |
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237 // RequestComplete will return ETrue if it can not handle a packet |
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238 // And it knows that some other sm can handle it. |
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239 // It will update the state to the one which can hanlde that packet first. |
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240 TBool furtherProcessNeeded = ETrue; |
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241 while(furtherProcessNeeded) |
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242 { |
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243 __KTRACE_OPT(KUSB, Kern::Printf(" We're at Stage: %s", DebugName[iCurrentStage])); |
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244 furtherProcessNeeded = iState[iCurrentStage]->RequestComplete(aCount,aError,aPktType); |
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245 __KTRACE_OPT(KUSB, Kern::Printf(" We're moved to stage: %s", DebugName[iCurrentStage])); |
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246 } |
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247 |
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248 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "< DControlTransferManager::Ep0RequestComplete")); |
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249 } |
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250 |
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251 // setup the state machine for a state |
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252 void DControlTransferManager::AddState(UsbShai::TControlStage aStage,TControlStageSm& aStageSm) |
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253 { |
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254 if( (aStage >= UsbShai::EControlTransferStageSetup) && (aStage < UsbShai::EControlTransferStageMax)) |
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255 { |
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256 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID " AddState(), Stage: %s", DebugName[aStage])); |
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257 iState[aStage] = &aStageSm; |
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258 } |
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259 } |
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260 |
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261 // *************** Code for SETUP state machines ************************************** |
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262 // |
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263 DSetupStageSm::DSetupStageSm(DControlTransferManager& aTransferMgr): |
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264 TControlStageSm(aTransferMgr) |
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265 { |
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266 } |
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267 |
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268 // WE are waiting a SETUP packet |
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269 TBool DSetupStageSm::RequestComplete(TInt aPktSize, TInt aError, UsbShai::TControlPacketType aPktType) |
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270 { |
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271 TBool ret = EFalse; |
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272 |
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273 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "DSetupStageSm::RequestComplete")); |
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274 |
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275 if(aPktType != UsbShai::EControlPacketTypeSetup) |
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276 { |
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277 // we just discard any non-setup packet |
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278 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "ALERT: DSetupStageSm - Non-Setup recieved")); |
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279 return ret; |
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280 } |
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281 |
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282 // change state to whatever returned from this call. |
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283 ChangeToStage(iTransferMgr.PktParser().NextStage()); |
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284 |
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285 // We're going to complete User's read request, consume the previous |
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286 // read operation |
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287 ClearPendingRead(); |
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288 |
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289 // Setup packet are always need to be processed |
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290 iTransferMgr.CtrTransferIf().ProcessSetupPacket(aPktSize,aError); |
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291 |
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292 return EFalse; |
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293 } |
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294 |
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295 TBool DSetupStageSm::IsRequstAllowed(TControlTransferRequest aRequest) |
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296 { |
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297 // Allow user to read, No other operation is allowed |
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298 TBool ret = (aRequest == TControlTransferRequestRead)?ETrue:EFalse; |
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299 |
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300 if( ! ret) |
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301 { |
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302 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "Warning: request %d was blocked at DSetupStageSm",aRequest)); |
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303 } |
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304 |
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305 return ret; |
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306 } |
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307 |
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308 |
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309 // *************** Code for DATA IN state machines ************************************** |
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310 |
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311 DDataInStageSm::DDataInStageSm(DControlTransferManager& aTransferMgr): |
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312 TControlStageSm(aTransferMgr) |
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313 { |
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314 } |
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315 |
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316 // We are waiting for a competion of DATA IN packet |
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317 TBool DDataInStageSm::RequestComplete(TInt aPktSize, TInt aError, UsbShai::TControlPacketType aPktType) |
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318 { |
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319 TInt completionCode = aError; |
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320 TBool furtherRequest = EFalse; |
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321 |
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322 switch(aPktType) |
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323 { |
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324 case UsbShai::EControlPacketTypeSetup: |
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325 { |
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326 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "ALERT: DDataInStageSm - Setup recieved")); |
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327 // Something goes wrong, host is abandoning the unfinished control transfer |
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328 completionCode = KErrGeneral; |
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329 |
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330 // Force SM restart at setup stage |
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331 ChangeToStage(UsbShai::EControlTransferStageSetup); |
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332 |
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333 // this packet is partially processed here |
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334 // need another SM to continue |
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335 furtherRequest = ETrue; |
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336 } |
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337 break; |
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338 |
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339 case UsbShai::EControlPacketTypeDataIn: |
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340 { |
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341 // PSL notifing us that the data had been sent to host |
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342 // next step is to wait for the status from Host |
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343 ChangeToStage(UsbShai::EControlTransferStageStatusOut); |
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344 |
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345 // In USB spec, a compete control transfer must inclue a status stage |
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346 // which is not case in reality,some PSL/Hardware will swallow the |
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347 // Status out report, so, we just complete client normally. |
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348 } |
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349 break; |
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350 |
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351 default: |
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352 { |
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353 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "ALERT: DDataInStageSm - %s recieved",DebugName[aPktType])); |
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354 |
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355 // Unexpected packet will be discard, and lead us reset state machine |
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356 // so that we can wait for next SETUP packet. |
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357 // Of course error will be report to any client if any there. |
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358 ChangeToStage(UsbShai::EControlTransferStageSetup); |
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359 completionCode = KErrGeneral; |
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360 } |
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361 break; |
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362 } |
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363 |
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364 iTransferMgr.CtrTransferIf().ProcessDataInPacket(aPktSize,completionCode); |
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365 |
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366 return furtherRequest; |
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367 } |
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368 |
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369 TBool DDataInStageSm::IsRequstAllowed(TControlTransferRequest aRequest) |
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370 { |
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371 // Only write is possible because host is waiting for data from us |
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372 TBool ret = (aRequest == TControlTransferRequestWrite)?ETrue:EFalse; |
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373 |
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374 if( ! ret) |
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375 { |
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376 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "Warning: request %d was blocked at DDataInStageSm",aRequest)); |
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377 } |
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378 |
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379 return ret; |
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380 }; |
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381 |
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382 // *************** Code for STATUS OUT state machines ************************************** |
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383 DStatusOutStageSm::DStatusOutStageSm(DControlTransferManager& aTransferMgr): |
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384 TControlStageSm(aTransferMgr) |
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385 { |
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386 } |
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387 |
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388 // We are waiting for a competion of STATUS OUT or a SETUP packet if PSL or hardware don't |
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389 // complete a status in packet |
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390 TBool DStatusOutStageSm::RequestComplete(TInt aPktSize, TInt aError, UsbShai::TControlPacketType aPktType) |
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391 { |
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392 TBool furtherRequest = EFalse; |
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393 TInt completionCode = aError; |
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394 |
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395 switch(aPktType) |
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396 { |
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397 case UsbShai::EControlPacketTypeSetup: |
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398 { |
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399 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "ALERT: DStatusOutStageSm - Setup recieved")); |
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400 // hw or PSL may not send back the status packet for a DATA OUT |
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401 // and we're ok for this, just back to EControlTransferStageSetup stage |
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402 |
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403 // Force SM restart at setup stage |
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404 ChangeToStage(UsbShai::EControlTransferStageSetup); |
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405 |
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406 // this packet is partially processed here |
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407 // need another SM to continue |
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408 furtherRequest = ETrue; |
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409 } |
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410 break; |
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411 |
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412 case UsbShai::EControlPacketTypeStatusOut: |
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413 { |
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414 // Force SM restart at setup stage |
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415 ChangeToStage(UsbShai::EControlTransferStageSetup); |
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416 } |
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417 break; |
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418 |
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419 default: |
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420 { |
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421 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "ALERT: DStatusOutStageSm - %s recieved",DebugName[aPktType])); |
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422 |
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423 // Unexpected packet will be discard, and lead us reset state machine |
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424 // so that we can wait for next SETUP packet. |
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425 // Of course error will be report to any client if any there. |
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426 ChangeToStage(UsbShai::EControlTransferStageSetup); |
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427 completionCode = KErrGeneral; |
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428 } |
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429 break; |
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430 } |
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431 |
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432 iTransferMgr.CtrTransferIf().ProcessStatusOutPacket(completionCode); |
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433 |
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434 return furtherRequest; |
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435 |
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436 } |
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437 |
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438 TBool DStatusOutStageSm::IsRequstAllowed(TControlTransferRequest aRequest) |
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439 { |
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440 // Read is ok since client don't care the status out stage. |
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441 // and this lead no hurt to anybody. |
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442 TBool ret = (aRequest == TControlTransferRequestRead)?ETrue:EFalse; |
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443 |
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444 if( ! ret) |
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445 { |
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446 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "Warning: request %d was blocked at DStatusOutStageSm",aRequest)); |
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447 } |
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448 |
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449 return ret; |
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450 }; |
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451 |
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452 // *************** Code for DATA OUT state machines ************************************** |
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453 // |
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454 DDataOutStageSm::DDataOutStageSm(DControlTransferManager& aTransferMgr): |
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455 TControlStageSm(aTransferMgr) |
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456 { |
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457 } |
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458 |
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459 TBool DDataOutStageSm::RequestComplete(TInt aPktSize, TInt aError, UsbShai::TControlPacketType aPktType) |
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460 { |
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461 TBool furtherRequest = EFalse; |
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462 TInt completionCode = aError; |
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463 |
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464 switch(aPktType) |
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465 { |
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466 case UsbShai::EControlPacketTypeSetup: |
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467 { |
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468 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "ALERT: DDataOutStageSm - Setup recieved")); |
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469 // Host is abandon the previous Transfer |
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470 completionCode = KErrGeneral; |
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471 |
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472 // Force SM restart at setup stage |
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473 ChangeToStage(UsbShai::EControlTransferStageSetup); |
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474 |
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475 // this packet is partially processed here |
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476 // need another SM to continue |
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477 furtherRequest = ETrue; |
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478 } |
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479 break; |
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480 |
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481 case UsbShai::EControlPacketTypeDataOut: |
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482 { |
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483 iTransferMgr.DataReceived(aPktSize); |
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484 |
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485 if(!iTransferMgr.IsMoreBytesNeeded()) |
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486 { |
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487 // We had recieved enough bytes as indicated by the setup |
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488 // packet, Data stage is finished. enter STATUS IN state |
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489 ChangeToStage(UsbShai::EControlTransferStageStatusIn); |
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490 } |
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491 } |
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492 break; |
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493 |
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494 case UsbShai::EControlPacketTypeStatusIn: |
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495 { |
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496 // Status in had been sent to host |
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497 // return and waiting for new SETUP |
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498 ChangeToStage(UsbShai::EControlTransferStageSetup); |
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499 } |
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500 break; |
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501 |
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502 default: |
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503 { |
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504 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "ALERT: DDataOutStageSm - %s recieved",DebugName[aPktType])); |
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505 |
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506 // Unexpected packet will be discard, and lead us reset state machine |
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507 // so that we can wait for next SETUP packet. |
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508 // Of course error will be report to any client if any there. |
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509 ChangeToStage(UsbShai::EControlTransferStageSetup); |
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510 completionCode = KErrGeneral; |
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511 } |
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512 break; |
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513 } |
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514 |
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515 ClearPendingRead(); |
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516 iTransferMgr.CtrTransferIf().ProcessDataOutPacket(aPktSize,completionCode); |
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517 |
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518 return furtherRequest; |
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519 } |
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520 |
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521 TBool DDataOutStageSm::IsRequstAllowed(TControlTransferRequest aRequest) |
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522 { |
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523 // only read operation is allowed in data out stage. |
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524 TBool ret = (aRequest == TControlTransferRequestRead)?ETrue:EFalse; |
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525 |
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526 if( ! ret) |
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527 { |
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528 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "Warning: request %d was blocked at DDataOutStageSm",aRequest)); |
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529 } |
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530 |
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531 return ret; |
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532 }; |
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533 |
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534 // *************** Code for DATA OUT state machines ************************************** |
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535 // |
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536 DStatusInStageSm::DStatusInStageSm(DControlTransferManager& aTransferMgr): |
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537 TControlStageSm(aTransferMgr) |
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538 { |
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539 } |
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540 |
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541 TBool DStatusInStageSm::RequestComplete(TInt aPktSize, TInt aError, UsbShai::TControlPacketType aPktType) |
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542 { |
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543 TBool furtherRequest = EFalse; |
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544 TInt completionCode = KErrNone; |
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545 |
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546 switch(aPktType) |
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547 { |
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548 case UsbShai::EControlPacketTypeSetup: |
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549 { |
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550 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "ALERT: DStatusInStageSm - Setup recieved")); |
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551 // Status in is an optional for PSL |
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552 // If we received a setup packet here, we assume the previous |
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553 // status in packet had been successfully sent to host. |
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554 |
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555 // Force SM restart at setup stage |
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556 ChangeToStage(UsbShai::EControlTransferStageSetup); |
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557 |
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558 // this packet is partially processed here |
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559 // need another SM to continue |
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560 furtherRequest = ETrue; |
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561 } |
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562 break; |
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563 |
|
564 case UsbShai::EControlPacketTypeStatusIn: |
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565 { |
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566 // Status in had been recieved, monitor setup packet then. |
|
567 ChangeToStage(UsbShai::EControlTransferStageSetup); |
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568 } |
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569 break; |
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570 |
|
571 default: |
|
572 { |
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573 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "ALERT: DStatusInStageSm - %s recieved",DebugName[aPktType])); |
|
574 |
|
575 // Unexpected packet will be discard, and lead us reset state machine |
|
576 // so that we can wait for next SETUP packet. |
|
577 // Of course error will be report to any client if any there. |
|
578 ChangeToStage(UsbShai::EControlTransferStageSetup); |
|
579 completionCode = KErrGeneral; |
|
580 } |
|
581 break; |
|
582 } |
|
583 |
|
584 iTransferMgr.CtrTransferIf().ProcessStatusInPacket(completionCode); |
|
585 |
|
586 return furtherRequest; |
|
587 } |
|
588 |
|
589 TBool DStatusInStageSm::IsRequstAllowed(TControlTransferRequest aRequest) |
|
590 { |
|
591 // Read is ok even we are wait for the client to send a zero status packet |
|
592 TBool ret = ((aRequest == TControlTransferRequestSendStatus) || |
|
593 (aRequest == TControlTransferRequestRead))?ETrue:EFalse; |
|
594 |
|
595 if( ! ret) |
|
596 { |
|
597 __KTRACE_OPT(KUSB, Kern::Printf(CTSM_ID "Warning: request %d was blocked at DStatusInStageSm",aRequest)); |
|
598 } |
|
599 |
|
600 return ret; |
|
601 } |
|
602 |
|
603 // End of file |
|
604 |
|