1 | /* |
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2 | * 3c90x.c -- This file implements the 3c90x driver for etherboot. Written |
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3 | * by Greg Beeley, Greg.Beeley@LightSys.org. Modified by Steve Smith, |
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4 | * Steve.Smith@Juno.Com. Alignment bug fix Neil Newell (nn@icenoir.net). |
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5 | * |
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6 | * Port from etherboot to gPXE API, implementation of tx/rx ring support |
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7 | * by Thomas Miletich, thomas.miletich@gmail.com |
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8 | * Thanks to Marty Connor and Stefan Hajnoczi for their help and feedback. |
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9 | * |
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10 | * This program Copyright (C) 1999 LightSys Technology Services, Inc. |
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11 | * Portions Copyright (C) 1999 Steve Smith |
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12 | * |
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13 | * This program may be re-distributed in source or binary form, modified, |
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14 | * sold, or copied for any purpose, provided that the above copyright message |
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15 | * and this text are included with all source copies or derivative works, and |
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16 | * provided that the above copyright message and this text are included in the |
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17 | * documentation of any binary-only distributions. This program is distributed |
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18 | * WITHOUT ANY WARRANTY, without even the warranty of FITNESS FOR A PARTICULAR |
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19 | * PURPOSE or MERCHANTABILITY. Please read the associated documentation |
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20 | * "3c90x.txt" before compiling and using this driver. |
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21 | * |
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22 | * -------- |
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23 | * |
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24 | * Program written with the assistance of the 3com documentation for |
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25 | * the 3c905B-TX card, as well as with some assistance from the 3c59x |
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26 | * driver Donald Becker wrote for the Linux kernel, and with some assistance |
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27 | * from the remainder of the Etherboot distribution. |
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28 | * |
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29 | * REVISION HISTORY: |
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30 | * |
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31 | * v0.10 1-26-1998 GRB Initial implementation. |
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32 | * v0.90 1-27-1998 GRB System works. |
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33 | * v1.00pre1 2-11-1998 GRB Got prom boot issue fixed. |
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34 | * v2.0 9-24-1999 SCS Modified for 3c905 (from 3c905b code) |
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35 | * Re-wrote poll and transmit for |
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36 | * better error recovery and heavy |
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37 | * network traffic operation |
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38 | * v2.01 5-26-2003 NN Fixed driver alignment issue which |
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39 | * caused system lockups if driver structures |
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40 | * not 8-byte aligned. |
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41 | * v2.02 11-28-2007 GSt Got polling working again by replacing |
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42 | * "for(i=0;i<40000;i++);" with "mdelay(1);" |
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43 | * |
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44 | * |
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45 | * indent options: indent -kr -i8 3c90x.c |
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46 | */ |
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47 | |
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48 | FILE_LICENCE ( BSD2 ); |
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49 | |
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50 | #ifndef __3C90X_H_ |
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51 | #define __3C90X_H_ |
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52 | |
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53 | static struct net_device_operations a3c90x_operations; |
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54 | |
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55 | #define XCVR_MAGIC (0x5A00) |
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56 | |
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57 | /* Register definitions for the 3c905 */ |
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58 | enum Registers { |
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59 | regPowerMgmtCtrl_w = 0x7c, /* 905B Revision Only */ |
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60 | regUpMaxBurst_w = 0x7a, /* 905B Revision Only */ |
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61 | regDnMaxBurst_w = 0x78, /* 905B Revision Only */ |
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62 | regDebugControl_w = 0x74, /* 905B Revision Only */ |
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63 | regDebugData_l = 0x70, /* 905B Revision Only */ |
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64 | regRealTimeCnt_l = 0x40, /* Universal */ |
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65 | regUpBurstThresh_b = 0x3e, /* 905B Revision Only */ |
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66 | regUpPoll_b = 0x3d, /* 905B Revision Only */ |
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67 | regUpPriorityThresh_b = 0x3c, /* 905B Revision Only */ |
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68 | regUpListPtr_l = 0x38, /* Universal */ |
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69 | regCountdown_w = 0x36, /* Universal */ |
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70 | regFreeTimer_w = 0x34, /* Universal */ |
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71 | regUpPktStatus_l = 0x30, /* Universal with Exception, pg 130 */ |
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72 | regTxFreeThresh_b = 0x2f, /* 90X Revision Only */ |
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73 | regDnPoll_b = 0x2d, /* 905B Revision Only */ |
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74 | regDnPriorityThresh_b = 0x2c, /* 905B Revision Only */ |
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75 | regDnBurstThresh_b = 0x2a, /* 905B Revision Only */ |
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76 | regDnListPtr_l = 0x24, /* Universal with Exception, pg 107 */ |
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77 | regDmaCtrl_l = 0x20, /* Universal with Exception, pg 106 */ |
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78 | /* */ |
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79 | regIntStatusAuto_w = 0x1e, /* 905B Revision Only */ |
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80 | regTxStatus_b = 0x1b, /* Universal with Exception, pg 113 */ |
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81 | regTimer_b = 0x1a, /* Universal */ |
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82 | regTxPktId_b = 0x18, /* 905B Revision Only */ |
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83 | regCommandIntStatus_w = 0x0e, /* Universal (Command Variations) */ |
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84 | }; |
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85 | |
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86 | /* following are windowed registers */ |
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87 | enum Registers7 { |
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88 | regPowerMgmtEvent_7_w = 0x0c, /* 905B Revision Only */ |
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89 | regVlanEtherType_7_w = 0x04, /* 905B Revision Only */ |
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90 | regVlanMask_7_w = 0x00, /* 905B Revision Only */ |
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91 | }; |
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92 | |
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93 | enum Registers6 { |
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94 | regBytesXmittedOk_6_w = 0x0c, /* Universal */ |
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95 | regBytesRcvdOk_6_w = 0x0a, /* Universal */ |
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96 | regUpperFramesOk_6_b = 0x09, /* Universal */ |
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97 | regFramesDeferred_6_b = 0x08, /* Universal */ |
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98 | regFramesRecdOk_6_b = 0x07, /* Universal with Exceptions, pg 142 */ |
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99 | regFramesXmittedOk_6_b = 0x06, /* Universal */ |
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100 | regRxOverruns_6_b = 0x05, /* Universal */ |
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101 | regLateCollisions_6_b = 0x04, /* Universal */ |
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102 | regSingleCollisions_6_b = 0x03, /* Universal */ |
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103 | regMultipleCollisions_6_b = 0x02, /* Universal */ |
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104 | regSqeErrors_6_b = 0x01, /* Universal */ |
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105 | regCarrierLost_6_b = 0x00, /* Universal */ |
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106 | }; |
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107 | |
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108 | enum Registers5 { |
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109 | regIndicationEnable_5_w = 0x0c, /* Universal */ |
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110 | regInterruptEnable_5_w = 0x0a, /* Universal */ |
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111 | regTxReclaimThresh_5_b = 0x09, /* 905B Revision Only */ |
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112 | regRxFilter_5_b = 0x08, /* Universal */ |
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113 | regRxEarlyThresh_5_w = 0x06, /* Universal */ |
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114 | regTxStartThresh_5_w = 0x00, /* Universal */ |
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115 | }; |
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116 | |
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117 | enum Registers4 { |
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118 | regUpperBytesOk_4_b = 0x0d, /* Universal */ |
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119 | regBadSSD_4_b = 0x0c, /* Universal */ |
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120 | regMediaStatus_4_w = 0x0a, /* Universal with Exceptions, pg 201 */ |
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121 | regPhysicalMgmt_4_w = 0x08, /* Universal */ |
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122 | regNetworkDiagnostic_4_w = 0x06, /* Universal with Exceptions, pg 203 */ |
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123 | regFifoDiagnostic_4_w = 0x04, /* Universal with Exceptions, pg 196 */ |
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124 | regVcoDiagnostic_4_w = 0x02, /* Undocumented? */ |
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125 | }; |
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126 | |
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127 | enum Registers3 { |
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128 | regTxFree_3_w = 0x0c, /* Universal */ |
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129 | regRxFree_3_w = 0x0a, /* Universal with Exceptions, pg 125 */ |
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130 | regResetMediaOptions_3_w = 0x08, /* Media Options on B Revision, */ |
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131 | /* Reset Options on Non-B Revision */ |
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132 | regMacControl_3_w = 0x06, /* Universal with Exceptions, pg 199 */ |
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133 | regMaxPktSize_3_w = 0x04, /* 905B Revision Only */ |
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134 | regInternalConfig_3_l = 0x00, /* Universal, different bit */ |
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135 | /* definitions, pg 59 */ |
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136 | }; |
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137 | |
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138 | enum Registers2 { |
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139 | regResetOptions_2_w = 0x0c, /* 905B Revision Only */ |
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140 | regStationMask_2_3w = 0x06, /* Universal with Exceptions, pg 127 */ |
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141 | regStationAddress_2_3w = 0x00, /* Universal with Exceptions, pg 127 */ |
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142 | }; |
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143 | |
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144 | enum Registers1 { |
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145 | regRxStatus_1_w = 0x0a, /* 90X Revision Only, Pg 126 */ |
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146 | }; |
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147 | |
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148 | enum Registers0 { |
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149 | regEepromData_0_w = 0x0c, /* Universal */ |
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150 | regEepromCommand_0_w = 0x0a, /* Universal */ |
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151 | regBiosRomData_0_b = 0x08, /* 905B Revision Only */ |
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152 | regBiosRomAddr_0_l = 0x04, /* 905B Revision Only */ |
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153 | }; |
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154 | |
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155 | |
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156 | /* The names for the eight register windows */ |
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157 | enum Windows { |
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158 | winNone = 0xff, |
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159 | winPowerVlan7 = 0x07, |
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160 | winStatistics6 = 0x06, |
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161 | winTxRxControl5 = 0x05, |
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162 | winDiagnostics4 = 0x04, |
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163 | winTxRxOptions3 = 0x03, |
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164 | winAddressing2 = 0x02, |
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165 | winUnused1 = 0x01, |
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166 | winEepromBios0 = 0x00, |
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167 | }; |
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168 | |
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169 | |
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170 | /* Command definitions for the 3c90X */ |
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171 | enum Commands { |
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172 | cmdGlobalReset = 0x00, /* Universal with Exceptions, pg 151 */ |
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173 | cmdSelectRegisterWindow = 0x01, /* Universal */ |
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174 | cmdEnableDcConverter = 0x02, /* */ |
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175 | cmdRxDisable = 0x03, /* */ |
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176 | cmdRxEnable = 0x04, /* Universal */ |
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177 | cmdRxReset = 0x05, /* Universal */ |
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178 | cmdStallCtl = 0x06, /* Universal */ |
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179 | cmdTxEnable = 0x09, /* Universal */ |
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180 | cmdTxDisable = 0x0A, /* */ |
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181 | cmdTxReset = 0x0B, /* Universal */ |
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182 | cmdRequestInterrupt = 0x0C, /* */ |
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183 | cmdAcknowledgeInterrupt = 0x0D, /* Universal */ |
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184 | cmdSetInterruptEnable = 0x0E, /* Universal */ |
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185 | cmdSetIndicationEnable = 0x0F, /* Universal */ |
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186 | cmdSetRxFilter = 0x10, /* Universal */ |
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187 | cmdSetRxEarlyThresh = 0x11, /* */ |
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188 | cmdSetTxStartThresh = 0x13, /* */ |
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189 | cmdStatisticsEnable = 0x15, /* */ |
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190 | cmdStatisticsDisable = 0x16, /* */ |
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191 | cmdDisableDcConverter = 0x17, /* */ |
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192 | cmdSetTxReclaimThresh = 0x18, /* */ |
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193 | cmdSetHashFilterBit = 0x19, /* */ |
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194 | }; |
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195 | |
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196 | enum FrameStartHeader { |
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197 | fshTxIndicate = 0x8000, |
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198 | fshDnComplete = 0x10000, |
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199 | }; |
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200 | |
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201 | enum UpDownDesc { |
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202 | upLastFrag = (1 << 31), |
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203 | downLastFrag = (1 << 31), |
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204 | }; |
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205 | |
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206 | enum UpPktStatus { |
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207 | upComplete = (1 << 15), |
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208 | upError = (1 << 14), |
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209 | }; |
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210 | |
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211 | enum Stalls { |
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212 | upStall = 0x00, |
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213 | upUnStall = 0x01, |
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214 | |
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215 | dnStall = 0x02, |
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216 | dnUnStall = 0x03, |
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217 | }; |
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218 | |
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219 | enum Resources { |
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220 | resRxRing = 0x00, |
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221 | resTxRing = 0x02, |
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222 | resRxIOBuf = 0x04 |
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223 | }; |
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224 | |
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225 | enum eeprom { |
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226 | eepromBusy = (1 << 15), |
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227 | eepromRead = ((0x02) << 6), |
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228 | eepromRead_556 = 0x230, |
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229 | eepromHwAddrOffset = 0x0a, |
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230 | }; |
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231 | |
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232 | /* Bit 4 is only used in revison B and upwards */ |
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233 | enum linktype { |
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234 | link10BaseT = 0x00, |
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235 | linkAUI = 0x01, |
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236 | link10Base2 = 0x03, |
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237 | link100BaseFX = 0x05, |
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238 | linkMII = 0x06, |
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239 | linkAutoneg = 0x08, |
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240 | linkExternalMII = 0x09, |
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241 | }; |
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242 | |
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243 | /* Values for int status register bitmask */ |
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244 | #define INT_INTERRUPTLATCH (1<<0) |
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245 | #define INT_HOSTERROR (1<<1) |
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246 | #define INT_TXCOMPLETE (1<<2) |
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247 | #define INT_RXCOMPLETE (1<<4) |
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248 | #define INT_RXEARLY (1<<5) |
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249 | #define INT_INTREQUESTED (1<<6) |
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250 | #define INT_UPDATESTATS (1<<7) |
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251 | #define INT_LINKEVENT (1<<8) |
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252 | #define INT_DNCOMPLETE (1<<9) |
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253 | #define INT_UPCOMPLETE (1<<10) |
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254 | #define INT_CMDINPROGRESS (1<<12) |
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255 | #define INT_WINDOWNUMBER (7<<13) |
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256 | |
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257 | /* Buffer sizes */ |
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258 | #define TX_RING_SIZE 8 |
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259 | #define RX_RING_SIZE 8 |
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260 | #define TX_RING_ALIGN 16 |
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261 | #define RX_RING_ALIGN 16 |
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262 | #define RX_BUF_SIZE 1536 |
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263 | |
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264 | /* Timeouts for eeprom and command completion */ |
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265 | /* Timeout 1 second, to be save */ |
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266 | #define EEPROM_TIMEOUT 1 * 1000 * 1000 |
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267 | |
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268 | /* TX descriptor */ |
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269 | struct TXD { |
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270 | volatile unsigned int DnNextPtr; |
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271 | volatile unsigned int FrameStartHeader; |
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272 | volatile unsigned int DataAddr; |
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273 | volatile unsigned int DataLength; |
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274 | } __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */ |
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275 | |
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276 | /* RX descriptor */ |
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277 | struct RXD { |
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278 | volatile unsigned int UpNextPtr; |
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279 | volatile unsigned int UpPktStatus; |
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280 | volatile unsigned int DataAddr; |
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281 | volatile unsigned int DataLength; |
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282 | } __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */ |
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283 | |
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284 | /* Private NIC dats */ |
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285 | struct INF_3C90X { |
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286 | unsigned int is3c556; |
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287 | unsigned char isBrev; |
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288 | unsigned char CurrentWindow; |
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289 | unsigned int IOAddr; |
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290 | unsigned short eeprom[0x21]; |
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291 | unsigned int tx_cur; /* current entry in tx_ring */ |
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292 | unsigned int tx_cnt; /* current number of used tx descriptors */ |
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293 | unsigned int tx_tail; /* entry of last finished packet */ |
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294 | unsigned int rx_cur; |
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295 | struct TXD *tx_ring; |
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296 | struct RXD *rx_ring; |
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297 | struct io_buffer *tx_iobuf[TX_RING_SIZE]; |
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298 | struct io_buffer *rx_iobuf[RX_RING_SIZE]; |
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299 | struct nvs_device nvs; |
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300 | }; |
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301 | |
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302 | #endif |
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