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1 // Copyright (c) 2007-2009 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 // |
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15 |
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16 #include <d32usbdi.h> |
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17 |
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18 #include <d32usbtransfers.h> |
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19 #include "usbtransferstrategy.h" |
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20 #include "zerocopytransferstrategy.h" |
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21 |
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22 |
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23 /** |
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24 Opens an interface identified by a token. When the hub driver loads a driver (via function driver |
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25 framework), this token is generated to allow the driver to open the interface. |
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26 |
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27 This also causes the interface's descriptors to be parsed for future reference. |
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28 |
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29 @param[in] aToken The token for the interface to open. |
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30 @return System-wide error code. |
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31 */ |
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32 EXPORT_C TInt RUsbInterface::Open(TUint32 aToken, TOwnerType aType) |
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33 { |
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34 TPckgC<TUint32> token(aToken); |
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35 TInt err = DoCreate(Name(), VersionRequired(), KNullUnit, NULL, &token, aType); |
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36 if(err == KErrNone) |
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37 { |
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38 // Create a transfer strategy |
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39 iTransferStrategy = new RUsbZeroCopyTransferStrategy; |
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40 if(!iTransferStrategy) |
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41 { |
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42 Close(); |
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43 return KErrNoMemory; |
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44 } |
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45 |
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46 // Get descriptor size |
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47 TInt interfaceDescSize = 0; |
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48 err = DoControl(EGetInterfaceDescriptorSize, &interfaceDescSize); |
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49 if(err != KErrNone) |
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50 { |
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51 Close(); |
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52 return err; |
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53 } |
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54 iInterfaceDescriptorData = HBufC8::New(interfaceDescSize); |
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55 |
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56 if(!iInterfaceDescriptorData) |
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57 { |
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58 Close(); |
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59 return KErrNoMemory; |
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60 } |
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61 |
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62 // Get descriptor data |
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63 TPtr8 interfaceDesc = iInterfaceDescriptorData->Des(); |
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64 err = DoControl(EGetInterfaceDescriptor, &interfaceDesc); |
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65 if(err != KErrNone) |
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66 { |
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67 Close(); |
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68 return err; |
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69 } |
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70 |
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71 // Parse descriptor |
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72 TUsbGenericDescriptor* parsed = NULL; |
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73 err = UsbDescriptorParser::Parse(*iInterfaceDescriptorData, parsed); |
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74 if(err != KErrNone) |
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75 { |
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76 if(parsed) |
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77 { |
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78 parsed->DestroyTree(); //or however much has been completed |
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79 delete parsed; |
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80 } |
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81 Close(); |
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82 return err; |
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83 } |
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84 |
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85 iHeadInterfaceDescriptor = TUsbInterfaceDescriptor::Cast(parsed); |
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86 if(!iHeadInterfaceDescriptor) |
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87 { |
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88 if(parsed) |
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89 { |
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90 parsed->DestroyTree(); |
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91 delete parsed; |
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92 } |
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93 Close(); |
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94 return KErrCorrupt; |
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95 } |
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96 } |
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97 |
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98 return err; |
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99 } |
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100 |
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101 /** |
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102 Close handle to interface. |
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103 |
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104 Closes any pipe handles still open. |
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105 */ |
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106 EXPORT_C void RUsbInterface::Close() |
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107 { |
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108 iAlternateSetting = 0; |
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109 if(iHeadInterfaceDescriptor) |
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110 { |
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111 iHeadInterfaceDescriptor->DestroyTree(); |
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112 delete iHeadInterfaceDescriptor; |
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113 iHeadInterfaceDescriptor = NULL; |
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114 } |
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115 if(iInterfaceDescriptorData) |
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116 { |
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117 delete iInterfaceDescriptorData; |
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118 iInterfaceDescriptorData = NULL; |
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119 } |
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120 if(iTransferStrategy) |
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121 { |
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122 iTransferStrategy->Close(); |
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123 delete iTransferStrategy; |
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124 iTransferStrategy = NULL; |
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125 } |
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126 RBusLogicalChannel::Close(); |
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127 } |
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128 |
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129 |
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130 EXPORT_C TInt RUsbInterface::RegisterTransferDescriptor(RUsbTransferDescriptor& aTransfer) |
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131 { |
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132 TTransferMemoryDetails details; |
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133 details.iType = aTransfer.iType; |
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134 details.iSize = aTransfer.iMaxSize; |
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135 details.iMaxPackets = aTransfer.iMaxNumPackets; |
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136 TInt err = DoControl(EGetSizeAndAlignment, &details); |
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137 if(err != KErrNone) |
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138 { |
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139 return err; |
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140 } |
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141 return iTransferStrategy->RegisterTransferDescriptor(aTransfer, details.iSize, details.iAlignment, details.iMaxPackets); |
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142 } |
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143 |
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144 EXPORT_C void RUsbInterface::ResetTransferDescriptors() |
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145 { |
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146 iTransferStrategy->ResetTransferDescriptors(); |
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147 } |
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148 |
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149 EXPORT_C TInt RUsbInterface::InitialiseTransferDescriptors() |
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150 { |
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151 return iTransferStrategy->InitialiseTransferDescriptors(*this); |
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152 } |
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153 |
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154 |