1 /* 2 * 3c90x.c -- This file implements the 3c90x driver for etherboot. Written 3 * by Greg Beeley, Greg.Beeley (at) LightSys.org. Modified by Steve Smith, 4 * Steve.Smith (at) Juno.Com. Alignment bug fix Neil Newell (nn (at) icenoir.net). 5 * 6 * Port from etherboot to gPXE API, implementation of tx/rx ring support 7 * by Thomas Miletich, thomas.miletich (at) 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 303
