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1 // Copyright (c) 2004-2009 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 // Provides utilities to build SCSI commands |
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15 // |
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16 // |
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17 |
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18 /** |
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19 @file |
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20 @internalTechnology |
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21 */ |
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22 |
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23 #include <e32std.h> |
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24 #include <e32std_private.h> |
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25 #include <testusbc.h> |
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26 #include "scsicmdbuilder.h" |
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27 |
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28 #define SCSI_READ_WRITE_LEN 10 |
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29 #define SCSI_UNIT_READY_LEN 6 |
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30 #define SCSI_MED_RMVL_LEN 6 |
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31 #define SCSI_START_STOP_LEN 6 |
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32 |
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33 GLDEF_D TBuf8<KScsiCmdMaxLen> scsiCmdBuf; |
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34 GLREF_D RDevTestUsbcClient usbcClient; |
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35 |
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36 void BuildReadWrite(TInt aFlag, TInt aLogicalBlkAddr, TInt aTotalBlks) |
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37 // |
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38 // Builds SCSI read(10) / write(10) command |
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39 // |
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40 { |
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41 // Zero out the whole buffer |
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42 scsiCmdBuf.FillZ(SCSI_READ_WRITE_LEN); |
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43 scsiCmdBuf[0] = TUint8(aFlag); // opcode for read (0x28)/write (0x2A) |
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44 |
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45 // Fill in logical block address. Big endian |
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46 scsiCmdBuf[2] = TUint8((aLogicalBlkAddr >> 24) & 0xFF); |
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47 scsiCmdBuf[3] = TUint8((aLogicalBlkAddr >> 16) & 0xFF); |
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48 scsiCmdBuf[4] = TUint8((aLogicalBlkAddr >> 8) & 0xFF); |
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49 scsiCmdBuf[5] = TUint8(aLogicalBlkAddr & 0xFF); |
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50 |
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51 // Data transfer length (# of sectors). Big endian |
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52 scsiCmdBuf[7] = TUint8((aTotalBlks >> 8) & 0xFF); |
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53 scsiCmdBuf[8] = TUint8((aTotalBlks & 0xFF)); |
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54 |
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55 scsiCmdBuf.SetLength(SCSI_READ_WRITE_LEN); |
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56 } |
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57 |
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58 void BuildMediumRemoval(TInt aFlag) |
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59 // |
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60 // Builds prevent/allow medium removal command |
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61 // |
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62 { |
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63 // Zero out the buf |
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64 scsiCmdBuf.SetLength(SCSI_MED_RMVL_LEN); |
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65 scsiCmdBuf.FillZ(SCSI_MED_RMVL_LEN); |
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66 scsiCmdBuf[0] = 0x1E; // opcode for medium removal |
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67 scsiCmdBuf[4] = TUint8(aFlag); // prevent(1)/allow(0) medium removal |
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68 } |
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69 |
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70 void BuildTestUnitReady() |
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71 // |
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72 // Builds test unit ready command |
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73 // |
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74 { |
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75 // Zero out the buf |
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76 scsiCmdBuf.FillZ(SCSI_UNIT_READY_LEN); |
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77 scsiCmdBuf[0] = 0; // opcode for test unit ready |
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78 |
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79 scsiCmdBuf.SetLength(SCSI_UNIT_READY_LEN); |
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80 } |
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81 |
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82 void BuildStartStopUnit(TInt aFlag) |
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83 // |
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84 // Builds start/stop unit command |
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85 // |
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86 { |
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87 const TUint8 KStartMask = 0x01; |
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88 const TUint8 KLoejMask = 0x02; |
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89 // Zero out the buf |
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90 scsiCmdBuf.FillZ(SCSI_START_STOP_LEN); |
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91 scsiCmdBuf[0] = 0x1B; // opcode for test unit ready |
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92 scsiCmdBuf[1] = 0x01; // set immed bit to true |
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93 scsiCmdBuf[4] = TUint8((aFlag == 1) ? KLoejMask & KStartMask : KLoejMask); // LOEJ + START or STOP |
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94 |
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95 scsiCmdBuf.SetLength(SCSI_START_STOP_LEN); |
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96 } |
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97 |
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98 void fillInt(TUint8* dest, TInt source) |
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99 // |
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100 // Copy an int. Little endian |
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101 // |
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102 { |
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103 for (TInt i = 0; i < 4; i++) |
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104 { |
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105 *dest++ = TUint8((source >> i*8) & 0xFF); |
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106 } |
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107 } |
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108 |
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109 TInt extractInt(const TUint8* aBuf) |
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110 // |
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111 // Extract an integer from a buffer. Assume little endian |
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112 // |
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113 { |
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114 return aBuf[0] + (aBuf[1] << 8) + (aBuf[2] << 16) + (aBuf[3] << 24); |
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115 } |
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116 |
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117 void createCBW(TDes8& aCbw, TInt aDCBWTag, TInt aDataTransferLen, TUint8 aInOutFlag, TDes8& aCBWCB, TUint8 aTestLun) |
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118 // |
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119 // aCbw: stores CBW |
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120 // aDCBWTag: a command block tag sent by the host. Used to associates a CSW |
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121 // with corresponding CBW |
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122 // aDataTranferLen: the number of bytes the host expects to transfer |
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123 // aInOutFlag: value for bmCBWFlags field, indicating the direction of transfer |
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124 // aCBWCB the actual command to be wrapped |
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125 // aTestLun local unit number |
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126 { |
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127 // Zero out aCbw |
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128 aCbw.SetLength(KCbwLength); |
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129 aCbw.FillZ(); |
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130 |
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131 // dCBWSignature field, the value comes from spec |
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132 TInt dCBWSignature = 0x43425355; |
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133 fillInt(&aCbw[0], dCBWSignature); |
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134 // dCBWTag field |
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135 fillInt(&aCbw[4], aDCBWTag); |
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136 // dCBWDataTransferLength field |
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137 fillInt(&aCbw[8], aDataTransferLen); |
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138 // bmCBWFlags field |
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139 aCbw[12] = aInOutFlag; |
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140 aCbw[13] = aTestLun; |
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141 // bCBWCBLength field |
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142 aCbw[14] = TUint8(aCBWCB.Length()); |
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143 |
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144 // CBWCB field |
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145 for (TInt i = 0; i < aCbw[14]; ++i) |
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146 { |
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147 aCbw[15 + i] = aCBWCB[i]; |
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148 } |
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149 } |
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150 |