[e16e8f2] | 1 | /* |
---|
| 2 | * 3c90x.c -- This file implements the 3c90x driver for etherboot. Written |
---|
| 3 | * by Greg Beeley, Greg.Beeley@LightSys.org. Modified by Steve Smith, |
---|
| 4 | * Steve.Smith@Juno.Com. Alignment bug fix Neil Newell (nn@icenoir.net). |
---|
| 5 | * |
---|
| 6 | * Port from etherboot to gPXE API, implementation of tx/rx ring support |
---|
| 7 | * by Thomas Miletich, thomas.miletich@gmail.com |
---|
| 8 | * Thanks to Marty Connor and Stefan Hajnoczi for their help and feedback. |
---|
| 9 | * |
---|
| 10 | * This program Copyright (C) 1999 LightSys Technology Services, Inc. |
---|
| 11 | * Portions Copyright (C) 1999 Steve Smith |
---|
| 12 | * |
---|
| 13 | * This program may be re-distributed in source or binary form, modified, |
---|
| 14 | * sold, or copied for any purpose, provided that the above copyright message |
---|
| 15 | * and this text are included with all source copies or derivative works, and |
---|
| 16 | * provided that the above copyright message and this text are included in the |
---|
| 17 | * documentation of any binary-only distributions. This program is distributed |
---|
| 18 | * WITHOUT ANY WARRANTY, without even the warranty of FITNESS FOR A PARTICULAR |
---|
| 19 | * PURPOSE or MERCHANTABILITY. Please read the associated documentation |
---|
| 20 | * "3c90x.txt" before compiling and using this driver. |
---|
| 21 | * |
---|
| 22 | * -------- |
---|
| 23 | * |
---|
| 24 | * Program written with the assistance of the 3com documentation for |
---|
| 25 | * the 3c905B-TX card, as well as with some assistance from the 3c59x |
---|
| 26 | * driver Donald Becker wrote for the Linux kernel, and with some assistance |
---|
| 27 | * from the remainder of the Etherboot distribution. |
---|
| 28 | * |
---|
| 29 | * REVISION HISTORY: |
---|
| 30 | * |
---|
| 31 | * v0.10 1-26-1998 GRB Initial implementation. |
---|
| 32 | * v0.90 1-27-1998 GRB System works. |
---|
| 33 | * v1.00pre1 2-11-1998 GRB Got prom boot issue fixed. |
---|
| 34 | * v2.0 9-24-1999 SCS Modified for 3c905 (from 3c905b code) |
---|
| 35 | * Re-wrote poll and transmit for |
---|
| 36 | * better error recovery and heavy |
---|
| 37 | * network traffic operation |
---|
| 38 | * v2.01 5-26-2003 NN Fixed driver alignment issue which |
---|
| 39 | * caused system lockups if driver structures |
---|
| 40 | * not 8-byte aligned. |
---|
| 41 | * v2.02 11-28-2007 GSt Got polling working again by replacing |
---|
| 42 | * "for(i=0;i<40000;i++);" with "mdelay(1);" |
---|
| 43 | * |
---|
| 44 | * |
---|
| 45 | * indent options: indent -kr -i8 3c90x.c |
---|
| 46 | */ |
---|
| 47 | |
---|
| 48 | FILE_LICENCE ( BSD2 ); |
---|
| 49 | |
---|
| 50 | #ifndef __3C90X_H_ |
---|
| 51 | #define __3C90X_H_ |
---|
| 52 | |
---|
| 53 | static struct net_device_operations a3c90x_operations; |
---|
| 54 | |
---|
| 55 | #define XCVR_MAGIC (0x5A00) |
---|
| 56 | |
---|
| 57 | /* Register definitions for the 3c905 */ |
---|
| 58 | enum Registers { |
---|
| 59 | regPowerMgmtCtrl_w = 0x7c, /* 905B Revision Only */ |
---|
| 60 | regUpMaxBurst_w = 0x7a, /* 905B Revision Only */ |
---|
| 61 | regDnMaxBurst_w = 0x78, /* 905B Revision Only */ |
---|
| 62 | regDebugControl_w = 0x74, /* 905B Revision Only */ |
---|
| 63 | regDebugData_l = 0x70, /* 905B Revision Only */ |
---|
| 64 | regRealTimeCnt_l = 0x40, /* Universal */ |
---|
| 65 | regUpBurstThresh_b = 0x3e, /* 905B Revision Only */ |
---|
| 66 | regUpPoll_b = 0x3d, /* 905B Revision Only */ |
---|
| 67 | regUpPriorityThresh_b = 0x3c, /* 905B Revision Only */ |
---|
| 68 | regUpListPtr_l = 0x38, /* Universal */ |
---|
| 69 | regCountdown_w = 0x36, /* Universal */ |
---|
| 70 | regFreeTimer_w = 0x34, /* Universal */ |
---|
| 71 | regUpPktStatus_l = 0x30, /* Universal with Exception, pg 130 */ |
---|
| 72 | regTxFreeThresh_b = 0x2f, /* 90X Revision Only */ |
---|
| 73 | regDnPoll_b = 0x2d, /* 905B Revision Only */ |
---|
| 74 | regDnPriorityThresh_b = 0x2c, /* 905B Revision Only */ |
---|
| 75 | regDnBurstThresh_b = 0x2a, /* 905B Revision Only */ |
---|
| 76 | regDnListPtr_l = 0x24, /* Universal with Exception, pg 107 */ |
---|
| 77 | regDmaCtrl_l = 0x20, /* Universal with Exception, pg 106 */ |
---|
| 78 | /* */ |
---|
| 79 | regIntStatusAuto_w = 0x1e, /* 905B Revision Only */ |
---|
| 80 | regTxStatus_b = 0x1b, /* Universal with Exception, pg 113 */ |
---|
| 81 | regTimer_b = 0x1a, /* Universal */ |
---|
| 82 | regTxPktId_b = 0x18, /* 905B Revision Only */ |
---|
| 83 | regCommandIntStatus_w = 0x0e, /* Universal (Command Variations) */ |
---|
| 84 | }; |
---|
| 85 | |
---|
| 86 | /* following are windowed registers */ |
---|
| 87 | enum Registers7 { |
---|
| 88 | regPowerMgmtEvent_7_w = 0x0c, /* 905B Revision Only */ |
---|
| 89 | regVlanEtherType_7_w = 0x04, /* 905B Revision Only */ |
---|
| 90 | regVlanMask_7_w = 0x00, /* 905B Revision Only */ |
---|
| 91 | }; |
---|
| 92 | |
---|
| 93 | enum Registers6 { |
---|
| 94 | regBytesXmittedOk_6_w = 0x0c, /* Universal */ |
---|
| 95 | regBytesRcvdOk_6_w = 0x0a, /* Universal */ |
---|
| 96 | regUpperFramesOk_6_b = 0x09, /* Universal */ |
---|
| 97 | regFramesDeferred_6_b = 0x08, /* Universal */ |
---|
| 98 | regFramesRecdOk_6_b = 0x07, /* Universal with Exceptions, pg 142 */ |
---|
| 99 | regFramesXmittedOk_6_b = 0x06, /* Universal */ |
---|
| 100 | regRxOverruns_6_b = 0x05, /* Universal */ |
---|
| 101 | regLateCollisions_6_b = 0x04, /* Universal */ |
---|
| 102 | regSingleCollisions_6_b = 0x03, /* Universal */ |
---|
| 103 | regMultipleCollisions_6_b = 0x02, /* Universal */ |
---|
| 104 | regSqeErrors_6_b = 0x01, /* Universal */ |
---|
| 105 | regCarrierLost_6_b = 0x00, /* Universal */ |
---|
| 106 | }; |
---|
| 107 | |
---|
| 108 | enum Registers5 { |
---|
| 109 | regIndicationEnable_5_w = 0x0c, /* Universal */ |
---|
| 110 | regInterruptEnable_5_w = 0x0a, /* Universal */ |
---|
| 111 | regTxReclaimThresh_5_b = 0x09, /* 905B Revision Only */ |
---|
| 112 | regRxFilter_5_b = 0x08, /* Universal */ |
---|
| 113 | regRxEarlyThresh_5_w = 0x06, /* Universal */ |
---|
| 114 | regTxStartThresh_5_w = 0x00, /* Universal */ |
---|
| 115 | }; |
---|
| 116 | |
---|
| 117 | enum Registers4 { |
---|
| 118 | regUpperBytesOk_4_b = 0x0d, /* Universal */ |
---|
| 119 | regBadSSD_4_b = 0x0c, /* Universal */ |
---|
| 120 | regMediaStatus_4_w = 0x0a, /* Universal with Exceptions, pg 201 */ |
---|
| 121 | regPhysicalMgmt_4_w = 0x08, /* Universal */ |
---|
| 122 | regNetworkDiagnostic_4_w = 0x06, /* Universal with Exceptions, pg 203 */ |
---|
| 123 | regFifoDiagnostic_4_w = 0x04, /* Universal with Exceptions, pg 196 */ |
---|
| 124 | regVcoDiagnostic_4_w = 0x02, /* Undocumented? */ |
---|
| 125 | }; |
---|
| 126 | |
---|
| 127 | enum Registers3 { |
---|
| 128 | regTxFree_3_w = 0x0c, /* Universal */ |
---|
| 129 | regRxFree_3_w = 0x0a, /* Universal with Exceptions, pg 125 */ |
---|
| 130 | regResetMediaOptions_3_w = 0x08, /* Media Options on B Revision, */ |
---|
| 131 | /* Reset Options on Non-B Revision */ |
---|
| 132 | regMacControl_3_w = 0x06, /* Universal with Exceptions, pg 199 */ |
---|
| 133 | regMaxPktSize_3_w = 0x04, /* 905B Revision Only */ |
---|
| 134 | regInternalConfig_3_l = 0x00, /* Universal, different bit */ |
---|
| 135 | /* definitions, pg 59 */ |
---|
| 136 | }; |
---|
| 137 | |
---|
| 138 | enum Registers2 { |
---|
| 139 | regResetOptions_2_w = 0x0c, /* 905B Revision Only */ |
---|
| 140 | regStationMask_2_3w = 0x06, /* Universal with Exceptions, pg 127 */ |
---|
| 141 | regStationAddress_2_3w = 0x00, /* Universal with Exceptions, pg 127 */ |
---|
| 142 | }; |
---|
| 143 | |
---|
| 144 | enum Registers1 { |
---|
| 145 | regRxStatus_1_w = 0x0a, /* 90X Revision Only, Pg 126 */ |
---|
| 146 | }; |
---|
| 147 | |
---|
| 148 | enum Registers0 { |
---|
| 149 | regEepromData_0_w = 0x0c, /* Universal */ |
---|
| 150 | regEepromCommand_0_w = 0x0a, /* Universal */ |
---|
| 151 | regBiosRomData_0_b = 0x08, /* 905B Revision Only */ |
---|
| 152 | regBiosRomAddr_0_l = 0x04, /* 905B Revision Only */ |
---|
| 153 | }; |
---|
| 154 | |
---|
| 155 | |
---|
| 156 | /* The names for the eight register windows */ |
---|
| 157 | enum Windows { |
---|
| 158 | winNone = 0xff, |
---|
| 159 | winPowerVlan7 = 0x07, |
---|
| 160 | winStatistics6 = 0x06, |
---|
| 161 | winTxRxControl5 = 0x05, |
---|
| 162 | winDiagnostics4 = 0x04, |
---|
| 163 | winTxRxOptions3 = 0x03, |
---|
| 164 | winAddressing2 = 0x02, |
---|
| 165 | winUnused1 = 0x01, |
---|
| 166 | winEepromBios0 = 0x00, |
---|
| 167 | }; |
---|
| 168 | |
---|
| 169 | |
---|
| 170 | /* Command definitions for the 3c90X */ |
---|
| 171 | enum Commands { |
---|
| 172 | cmdGlobalReset = 0x00, /* Universal with Exceptions, pg 151 */ |
---|
| 173 | cmdSelectRegisterWindow = 0x01, /* Universal */ |
---|
| 174 | cmdEnableDcConverter = 0x02, /* */ |
---|
| 175 | cmdRxDisable = 0x03, /* */ |
---|
| 176 | cmdRxEnable = 0x04, /* Universal */ |
---|
| 177 | cmdRxReset = 0x05, /* Universal */ |
---|
| 178 | cmdStallCtl = 0x06, /* Universal */ |
---|
| 179 | cmdTxEnable = 0x09, /* Universal */ |
---|
| 180 | cmdTxDisable = 0x0A, /* */ |
---|
| 181 | cmdTxReset = 0x0B, /* Universal */ |
---|
| 182 | cmdRequestInterrupt = 0x0C, /* */ |
---|
| 183 | cmdAcknowledgeInterrupt = 0x0D, /* Universal */ |
---|
| 184 | cmdSetInterruptEnable = 0x0E, /* Universal */ |
---|
| 185 | cmdSetIndicationEnable = 0x0F, /* Universal */ |
---|
| 186 | cmdSetRxFilter = 0x10, /* Universal */ |
---|
| 187 | cmdSetRxEarlyThresh = 0x11, /* */ |
---|
| 188 | cmdSetTxStartThresh = 0x13, /* */ |
---|
| 189 | cmdStatisticsEnable = 0x15, /* */ |
---|
| 190 | cmdStatisticsDisable = 0x16, /* */ |
---|
| 191 | cmdDisableDcConverter = 0x17, /* */ |
---|
| 192 | cmdSetTxReclaimThresh = 0x18, /* */ |
---|
| 193 | cmdSetHashFilterBit = 0x19, /* */ |
---|
| 194 | }; |
---|
| 195 | |
---|
| 196 | enum FrameStartHeader { |
---|
| 197 | fshTxIndicate = 0x8000, |
---|
| 198 | fshDnComplete = 0x10000, |
---|
| 199 | }; |
---|
| 200 | |
---|
| 201 | enum UpDownDesc { |
---|
| 202 | upLastFrag = (1 << 31), |
---|
| 203 | downLastFrag = (1 << 31), |
---|
| 204 | }; |
---|
| 205 | |
---|
| 206 | enum UpPktStatus { |
---|
| 207 | upComplete = (1 << 15), |
---|
| 208 | upError = (1 << 14), |
---|
| 209 | }; |
---|
| 210 | |
---|
| 211 | enum Stalls { |
---|
| 212 | upStall = 0x00, |
---|
| 213 | upUnStall = 0x01, |
---|
| 214 | |
---|
| 215 | dnStall = 0x02, |
---|
| 216 | dnUnStall = 0x03, |
---|
| 217 | }; |
---|
| 218 | |
---|
| 219 | enum Resources { |
---|
| 220 | resRxRing = 0x00, |
---|
| 221 | resTxRing = 0x02, |
---|
| 222 | resRxIOBuf = 0x04 |
---|
| 223 | }; |
---|
| 224 | |
---|
| 225 | enum eeprom { |
---|
| 226 | eepromBusy = (1 << 15), |
---|
| 227 | eepromRead = ((0x02) << 6), |
---|
| 228 | eepromRead_556 = 0x230, |
---|
| 229 | eepromHwAddrOffset = 0x0a, |
---|
| 230 | }; |
---|
| 231 | |
---|
| 232 | /* Bit 4 is only used in revison B and upwards */ |
---|
| 233 | enum linktype { |
---|
| 234 | link10BaseT = 0x00, |
---|
| 235 | linkAUI = 0x01, |
---|
| 236 | link10Base2 = 0x03, |
---|
| 237 | link100BaseFX = 0x05, |
---|
| 238 | linkMII = 0x06, |
---|
| 239 | linkAutoneg = 0x08, |
---|
| 240 | linkExternalMII = 0x09, |
---|
| 241 | }; |
---|
| 242 | |
---|
| 243 | /* Values for int status register bitmask */ |
---|
| 244 | #define INT_INTERRUPTLATCH (1<<0) |
---|
| 245 | #define INT_HOSTERROR (1<<1) |
---|
| 246 | #define INT_TXCOMPLETE (1<<2) |
---|
| 247 | #define INT_RXCOMPLETE (1<<4) |
---|
| 248 | #define INT_RXEARLY (1<<5) |
---|
| 249 | #define INT_INTREQUESTED (1<<6) |
---|
| 250 | #define INT_UPDATESTATS (1<<7) |
---|
| 251 | #define INT_LINKEVENT (1<<8) |
---|
| 252 | #define INT_DNCOMPLETE (1<<9) |
---|
| 253 | #define INT_UPCOMPLETE (1<<10) |
---|
| 254 | #define INT_CMDINPROGRESS (1<<12) |
---|
| 255 | #define INT_WINDOWNUMBER (7<<13) |
---|
| 256 | |
---|
| 257 | /* Buffer sizes */ |
---|
| 258 | #define TX_RING_SIZE 8 |
---|
| 259 | #define RX_RING_SIZE 8 |
---|
| 260 | #define TX_RING_ALIGN 16 |
---|
| 261 | #define RX_RING_ALIGN 16 |
---|
| 262 | #define RX_BUF_SIZE 1536 |
---|
| 263 | |
---|
| 264 | /* Timeouts for eeprom and command completion */ |
---|
| 265 | /* Timeout 1 second, to be save */ |
---|
| 266 | #define EEPROM_TIMEOUT 1 * 1000 * 1000 |
---|
| 267 | |
---|
| 268 | /* TX descriptor */ |
---|
| 269 | struct TXD { |
---|
| 270 | volatile unsigned int DnNextPtr; |
---|
| 271 | volatile unsigned int FrameStartHeader; |
---|
| 272 | volatile unsigned int DataAddr; |
---|
| 273 | volatile unsigned int DataLength; |
---|
| 274 | } __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */ |
---|
| 275 | |
---|
| 276 | /* RX descriptor */ |
---|
| 277 | struct RXD { |
---|
| 278 | volatile unsigned int UpNextPtr; |
---|
| 279 | volatile unsigned int UpPktStatus; |
---|
| 280 | volatile unsigned int DataAddr; |
---|
| 281 | volatile unsigned int DataLength; |
---|
| 282 | } __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */ |
---|
| 283 | |
---|
| 284 | /* Private NIC dats */ |
---|
| 285 | struct INF_3C90X { |
---|
| 286 | unsigned int is3c556; |
---|
| 287 | unsigned char isBrev; |
---|
| 288 | unsigned char CurrentWindow; |
---|
| 289 | unsigned int IOAddr; |
---|
| 290 | unsigned short eeprom[0x21]; |
---|
| 291 | unsigned int tx_cur; /* current entry in tx_ring */ |
---|
| 292 | unsigned int tx_cnt; /* current number of used tx descriptors */ |
---|
| 293 | unsigned int tx_tail; /* entry of last finished packet */ |
---|
| 294 | unsigned int rx_cur; |
---|
| 295 | struct TXD *tx_ring; |
---|
| 296 | struct RXD *rx_ring; |
---|
| 297 | struct io_buffer *tx_iobuf[TX_RING_SIZE]; |
---|
| 298 | struct io_buffer *rx_iobuf[RX_RING_SIZE]; |
---|
| 299 | struct nvs_device nvs; |
---|
| 300 | }; |
---|
| 301 | |
---|
| 302 | #endif |
---|