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).
6 * This program Copyright (C) 1999 LightSys Technology Services, Inc.
7 * Portions Copyright (C) 1999 Steve Smith
9 * This program may be re-distributed in source or binary form, modified,
10 * sold, or copied for any purpose, provided that the above copyright message
11 * and this text are included with all source copies or derivative works, and
12 * provided that the above copyright message and this text are included in the
13 * documentation of any binary-only distributions. This program is distributed
14 * WITHOUT ANY WARRANTY, without even the warranty of FITNESS FOR A PARTICULAR
15 * PURPOSE or MERCHANTABILITY. Please read the associated documentation
16 * "3c90x.txt" before compiling and using this driver.
20 * Program written with the assistance of the 3com documentation for
21 * the 3c905B-TX card, as well as with some assistance from the 3c59x
22 * driver Donald Becker wrote for the Linux kernel, and with some assistance
23 * from the remainder of the Etherboot distribution.
27 * v0.10 1-26-1998 GRB Initial implementation.
28 * v0.90 1-27-1998 GRB System works.
29 * v1.00pre1 2-11-1998 GRB Got prom boot issue fixed.
30 * v2.0 9-24-1999 SCS Modified for 3c905 (from 3c905b code)
31 * Re-wrote poll and transmit for
32 * better error recovery and heavy
33 * network traffic operation
34 * v2.01 5-26-2003 NN Fixed driver alignment issue which
35 * caused system lockups if driver structures
40 #include "etherboot.h"
45 static struct nic_operations a3c90x_operations;
47 #define XCVR_MAGIC (0x5A00)
48 /** any single transmission fails after 16 collisions or other errors
49 ** this is the number of times to retry the transmission -- this should
52 #define XMIT_RETRIES 250
54 /*** Register definitions for the 3c905 ***/
57 regPowerMgmtCtrl_w = 0x7c, /** 905B Revision Only **/
58 regUpMaxBurst_w = 0x7a, /** 905B Revision Only **/
59 regDnMaxBurst_w = 0x78, /** 905B Revision Only **/
60 regDebugControl_w = 0x74, /** 905B Revision Only **/
61 regDebugData_l = 0x70, /** 905B Revision Only **/
62 regRealTimeCnt_l = 0x40, /** Universal **/
63 regUpBurstThresh_b = 0x3e, /** 905B Revision Only **/
64 regUpPoll_b = 0x3d, /** 905B Revision Only **/
65 regUpPriorityThresh_b = 0x3c, /** 905B Revision Only **/
66 regUpListPtr_l = 0x38, /** Universal **/
67 regCountdown_w = 0x36, /** Universal **/
68 regFreeTimer_w = 0x34, /** Universal **/
69 regUpPktStatus_l = 0x30, /** Universal with Exception, pg 130 **/
70 regTxFreeThresh_b = 0x2f, /** 90X Revision Only **/
71 regDnPoll_b = 0x2d, /** 905B Revision Only **/
72 regDnPriorityThresh_b = 0x2c, /** 905B Revision Only **/
73 regDnBurstThresh_b = 0x2a, /** 905B Revision Only **/
74 regDnListPtr_l = 0x24, /** Universal with Exception, pg 107 **/
75 regDmaCtrl_l = 0x20, /** Universal with Exception, pg 106 **/
77 regIntStatusAuto_w = 0x1e, /** 905B Revision Only **/
78 regTxStatus_b = 0x1b, /** Universal with Exception, pg 113 **/
79 regTimer_b = 0x1a, /** Universal **/
80 regTxPktId_b = 0x18, /** 905B Revision Only **/
81 regCommandIntStatus_w = 0x0e, /** Universal (Command Variations) **/
84 /** following are windowed registers **/
87 regPowerMgmtEvent_7_w = 0x0c, /** 905B Revision Only **/
88 regVlanEtherType_7_w = 0x04, /** 905B Revision Only **/
89 regVlanMask_7_w = 0x00, /** 905B Revision Only **/
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 **/
110 regIndicationEnable_5_w = 0x0c, /** Universal **/
111 regInterruptEnable_5_w = 0x0a, /** Universal **/
112 regTxReclaimThresh_5_b = 0x09, /** 905B Revision Only **/
113 regRxFilter_5_b = 0x08, /** Universal **/
114 regRxEarlyThresh_5_w = 0x06, /** Universal **/
115 regTxStartThresh_5_w = 0x00, /** Universal **/
120 regUpperBytesOk_4_b = 0x0d, /** Universal **/
121 regBadSSD_4_b = 0x0c, /** Universal **/
122 regMediaStatus_4_w = 0x0a, /** Universal with Exceptions, pg 201 **/
123 regPhysicalMgmt_4_w = 0x08, /** Universal **/
124 regNetworkDiagnostic_4_w = 0x06, /** Universal with Exceptions, pg 203 **/
125 regFifoDiagnostic_4_w = 0x04, /** Universal with Exceptions, pg 196 **/
126 regVcoDiagnostic_4_w = 0x02, /** Undocumented? **/
131 regTxFree_3_w = 0x0c, /** Universal **/
132 regRxFree_3_w = 0x0a, /** Universal with Exceptions, pg 125 **/
133 regResetMediaOptions_3_w = 0x08, /** Media Options on B Revision, **/
134 /** Reset Options on Non-B Revision **/
135 regMacControl_3_w = 0x06, /** Universal with Exceptions, pg 199 **/
136 regMaxPktSize_3_w = 0x04, /** 905B Revision Only **/
137 regInternalConfig_3_l = 0x00, /** Universal, different bit **/
138 /** definitions, pg 59 **/
143 regResetOptions_2_w = 0x0c, /** 905B Revision Only **/
144 regStationMask_2_3w = 0x06, /** Universal with Exceptions, pg 127 **/
145 regStationAddress_2_3w = 0x00, /** Universal with Exceptions, pg 127 **/
150 regRxStatus_1_w = 0x0a, /** 90X Revision Only, Pg 126 **/
155 regEepromData_0_w = 0x0c, /** Universal **/
156 regEepromCommand_0_w = 0x0a, /** Universal **/
157 regBiosRomData_0_b = 0x08, /** 905B Revision Only **/
158 regBiosRomAddr_0_l = 0x04, /** 905B Revision Only **/
162 /*** The names for the eight register windows ***/
165 winPowerVlan7 = 0x07,
166 winStatistics6 = 0x06,
167 winTxRxControl5 = 0x05,
168 winDiagnostics4 = 0x04,
169 winTxRxOptions3 = 0x03,
170 winAddressing2 = 0x02,
172 winEepromBios0 = 0x00,
176 /*** Command definitions for the 3c90X ***/
179 cmdGlobalReset = 0x00, /** Universal with Exceptions, pg 151 **/
180 cmdSelectRegisterWindow = 0x01, /** Universal **/
181 cmdEnableDcConverter = 0x02, /** **/
182 cmdRxDisable = 0x03, /** **/
183 cmdRxEnable = 0x04, /** Universal **/
184 cmdRxReset = 0x05, /** Universal **/
185 cmdStallCtl = 0x06, /** Universal **/
186 cmdTxEnable = 0x09, /** Universal **/
187 cmdTxDisable = 0x0A, /** **/
188 cmdTxReset = 0x0B, /** Universal **/
189 cmdRequestInterrupt = 0x0C, /** **/
190 cmdAcknowledgeInterrupt = 0x0D, /** Universal **/
191 cmdSetInterruptEnable = 0x0E, /** Universal **/
192 cmdSetIndicationEnable = 0x0F, /** Universal **/
193 cmdSetRxFilter = 0x10, /** Universal **/
194 cmdSetRxEarlyThresh = 0x11, /** **/
195 cmdSetTxStartThresh = 0x13, /** **/
196 cmdStatisticsEnable = 0x15, /** **/
197 cmdStatisticsDisable = 0x16, /** **/
198 cmdDisableDcConverter = 0x17, /** **/
199 cmdSetTxReclaimThresh = 0x18, /** **/
200 cmdSetHashFilterBit = 0x19, /** **/
204 /*** Values for int status register bitmask **/
205 #define INT_INTERRUPTLATCH (1<<0)
206 #define INT_HOSTERROR (1<<1)
207 #define INT_TXCOMPLETE (1<<2)
208 #define INT_RXCOMPLETE (1<<4)
209 #define INT_RXEARLY (1<<5)
210 #define INT_INTREQUESTED (1<<6)
211 #define INT_UPDATESTATS (1<<7)
212 #define INT_LINKEVENT (1<<8)
213 #define INT_DNCOMPLETE (1<<9)
214 #define INT_UPCOMPLETE (1<<10)
215 #define INT_CMDINPROGRESS (1<<12)
216 #define INT_WINDOWNUMBER (7<<13)
219 /*** TX descriptor ***/
222 unsigned int DnNextPtr;
223 unsigned int FrameStartHeader;
224 unsigned int HdrAddr;
225 unsigned int HdrLength;
226 unsigned int DataAddr;
227 unsigned int DataLength;
229 TXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
231 /*** RX descriptor ***/
234 unsigned int UpNextPtr;
235 unsigned int UpPktStatus;
236 unsigned int DataAddr;
237 unsigned int DataLength;
239 RXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
241 /*** Global variables ***/
244 unsigned int is3c556;
245 unsigned char isBrev;
246 unsigned char CurrentWindow;
248 unsigned char HWAddr[ETH_ALEN];
255 /*** a3c90x_internal_IssueCommand: sends a command to the 3c90x card
258 a3c90x_internal_IssueCommand(int ioaddr, int cmd, int param)
262 /** Build the cmd. **/
267 /** Send the cmd to the cmd register **/
268 outw(val, ioaddr + regCommandIntStatus_w);
270 /** Wait for the cmd to complete, if necessary **/
271 while (inw(ioaddr + regCommandIntStatus_w) & INT_CMDINPROGRESS);
277 /*** a3c90x_internal_SetWindow: selects a register window set.
280 a3c90x_internal_SetWindow(int ioaddr, int window)
283 /** Window already as set? **/
284 if (INF_3C90X.CurrentWindow == window) return 0;
286 /** Issue the window command. **/
287 a3c90x_internal_IssueCommand(ioaddr, cmdSelectRegisterWindow, window);
288 INF_3C90X.CurrentWindow = window;
294 /*** a3c90x_internal_ReadEeprom - read data from the serial eeprom.
296 static unsigned short
297 a3c90x_internal_ReadEeprom(int ioaddr, int address)
301 /** Select correct window **/
302 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winEepromBios0);
304 /** Make sure the eeprom isn't busy **/
305 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
307 /** Read the value. **/
308 if (INF_3C90X.is3c556)
310 outw(address + (0x230), ioaddr + regEepromCommand_0_w);
314 outw(address + ((0x02)<<6), ioaddr + regEepromCommand_0_w);
317 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
318 val = inw(ioaddr + regEepromData_0_w);
325 /*** a3c90x_internal_WriteEepromWord - write a physical word of
326 *** data to the onboard serial eeprom (not the BIOS prom, but the
327 *** nvram in the card that stores, among other things, the MAC
331 a3c90x_internal_WriteEepromWord(int ioaddr, int address, unsigned short value)
333 /** Select register window **/
334 a3c90x_internal_SetWindow(ioaddr, winEepromBios0);
336 /** Verify Eeprom not busy **/
337 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
339 /** Issue WriteEnable, and wait for completion. **/
340 outw(0x30, ioaddr + regEepromCommand_0_w);
341 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
343 /** Issue EraseRegister, and wait for completion. **/
344 outw(address + ((0x03)<<6), ioaddr + regEepromCommand_0_w);
345 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
347 /** Send the new data to the eeprom, and wait for completion. **/
348 outw(value, ioaddr + regEepromData_0_w);
349 outw(0x30, ioaddr + regEepromCommand_0_w);
350 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
352 /** Burn the new data into the eeprom, and wait for completion. **/
353 outw(address + ((0x01)<<6), ioaddr + regEepromCommand_0_w);
354 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
361 /*** a3c90x_internal_WriteEeprom - write data to the serial eeprom,
362 *** and re-compute the eeprom checksum.
365 a3c90x_internal_WriteEeprom(int ioaddr, int address, unsigned short value)
369 int maxAddress, cksumAddress;
371 if (INF_3C90X.isBrev)
382 /** Write the value. **/
383 if (a3c90x_internal_WriteEepromWord(ioaddr, address, value) == -1)
386 /** Recompute the checksum. **/
387 for(i=0;i<=maxAddress;i++)
389 v = a3c90x_internal_ReadEeprom(ioaddr, i);
391 cksum ^= ((v>>8) & 0xFF);
393 /** Write the checksum to the location in the eeprom **/
394 if (a3c90x_internal_WriteEepromWord(ioaddr, cksumAddress, cksum) == -1)
401 /*** a3c90x_reset: exported function that resets the card to its default
402 *** state. This is so the Linux driver can re-set the card up the way
403 *** it wants to. If CFG_3C90X_PRESERVE_XCVR is defined, then the reset will
404 *** not alter the selected transceiver that we used to download the boot
407 static void a3c90x_reset(void)
409 #ifdef CFG_3C90X_PRESERVE_XCVR
411 /** Read the current InternalConfig value. **/
412 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winTxRxOptions3);
413 cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
416 /** Send the reset command to the card **/
417 printf("Issuing RESET:\n");
418 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdGlobalReset, 0);
420 /** wait for reset command to complete **/
421 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS);
423 /** global reset command resets station mask, non-B revision cards
424 ** require explicit reset of values
426 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winAddressing2);
427 outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+0);
428 outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
429 outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
431 #ifdef CFG_3C90X_PRESERVE_XCVR
432 /** Re-set the original InternalConfig value from before reset **/
433 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winTxRxOptions3);
434 outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
436 /** enable DC converter for 10-Base-T **/
437 if ((cfg&0x0300) == 0x0300)
439 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
443 /** Issue transmit reset, wait for command completion **/
444 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxReset, 0);
445 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
447 if (! INF_3C90X.isBrev)
448 outb(0x01, INF_3C90X.IOAddr + regTxFreeThresh_b);
449 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxEnable, 0);
452 ** reset of the receiver on B-revision cards re-negotiates the link
453 ** takes several seconds (a computer eternity)
455 if (INF_3C90X.isBrev)
456 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxReset, 0x04);
458 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxReset, 0x00);
459 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS);
461 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxEnable, 0);
463 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
464 cmdSetInterruptEnable, 0);
465 /** enable rxComplete and txComplete **/
466 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
467 cmdSetIndicationEnable, 0x0014);
468 /** acknowledge any pending status flags **/
469 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
470 cmdAcknowledgeInterrupt, 0x661);
477 /*** a3c90x_transmit: exported function that transmits a packet. Does not
478 *** return any particular status. Parameters are:
479 *** d[6] - destination address, ethernet;
480 *** t - protocol type (ARP, IP, etc);
481 *** s - size of the non-header part of the packet that needs transmitted;
482 *** p - the pointer to the packet data itself.
485 a3c90x_transmit(struct nic *nic __unused, const char *d, unsigned int t,
486 unsigned int s, const char *p)
491 unsigned char dst_addr[ETH_ALEN];
492 unsigned char src_addr[ETH_ALEN];
496 unsigned char status;
499 for (retries=0; retries < XMIT_RETRIES ; retries++)
501 /** Stall the download engine **/
502 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdStallCtl, 2);
504 /** Make sure the card is not waiting on us **/
505 inw(INF_3C90X.IOAddr + regCommandIntStatus_w);
506 inw(INF_3C90X.IOAddr + regCommandIntStatus_w);
508 while (inw(INF_3C90X.IOAddr+regCommandIntStatus_w) &
512 /** Set the ethernet packet type **/
515 /** Copy the destination address **/
516 memcpy(hdr.dst_addr, d, ETH_ALEN);
518 /** Copy our MAC address **/
519 memcpy(hdr.src_addr, INF_3C90X.HWAddr, ETH_ALEN);
521 /** Setup the DPD (download descriptor) **/
522 INF_3C90X.TransmitDPD.DnNextPtr = 0;
523 /** set notification for transmission completion (bit 15) **/
524 INF_3C90X.TransmitDPD.FrameStartHeader = (s + sizeof(hdr)) | 0x8000;
525 INF_3C90X.TransmitDPD.HdrAddr = virt_to_bus(&hdr);
526 INF_3C90X.TransmitDPD.HdrLength = sizeof(hdr);
527 INF_3C90X.TransmitDPD.DataAddr = virt_to_bus(p);
528 INF_3C90X.TransmitDPD.DataLength = s + (1<<31);
530 /** Send the packet **/
531 outl(virt_to_bus(&(INF_3C90X.TransmitDPD)),
532 INF_3C90X.IOAddr + regDnListPtr_l);
534 /** End Stall and Wait for upload to complete. **/
535 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdStallCtl, 3);
536 while(inl(INF_3C90X.IOAddr + regDnListPtr_l) != 0)
539 /** Wait for NIC Transmit to Complete **/
540 load_timer2(10*TICKS_PER_MS); /* Give it 10 ms */
541 while (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0004) &&
545 if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0004))
547 printf("3C90X: Tx Timeout\n");
551 status = inb(INF_3C90X.IOAddr + regTxStatus_b);
553 /** acknowledge transmit interrupt by writing status **/
554 outb(0x00, INF_3C90X.IOAddr + regTxStatus_b);
556 /** successful completion (sans "interrupt Requested" bit) **/
557 if ((status & 0xbf) == 0x80)
560 printf("3C90X: Status (%hhX)\n", status);
561 /** check error codes **/
564 printf("3C90X: Tx Reclaim Error (%hhX)\n", status);
567 else if (status & 0x04)
569 printf("3C90X: Tx Status Overflow (%hhX)\n", status);
571 outb(0x00, INF_3C90X.IOAddr + regTxStatus_b);
572 /** must re-enable after max collisions before re-issuing tx **/
573 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxEnable, 0);
575 else if (status & 0x08)
577 printf("3C90X: Tx Max Collisions (%hhX)\n", status);
578 /** must re-enable after max collisions before re-issuing tx **/
579 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxEnable, 0);
581 else if (status & 0x10)
583 printf("3C90X: Tx Underrun (%hhX)\n", status);
586 else if (status & 0x20)
588 printf("3C90X: Tx Jabber (%hhX)\n", status);
591 else if ((status & 0x80) != 0x80)
593 printf("3C90X: Internal Error - Incomplete Transmission (%hhX)\n",
599 /** failed after RETRY attempts **/
600 printf("Failed to send after %d retries\n", retries);
607 /*** a3c90x_poll: exported routine that waits for a certain length of time
608 *** for a packet, and if it sees none, returns 0. This routine should
609 *** copy the packet to nic->packet if it gets a packet and set the size
610 *** in nic->packetlen. Return 1 if a packet was found.
613 a3c90x_poll(struct nic *nic, int retrieve)
617 if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0010))
622 if ( ! retrieve ) return 1;
624 /** we don't need to acknowledge rxComplete -- the upload engine
628 /** Build the up-load descriptor **/
629 INF_3C90X.ReceiveUPD.UpNextPtr = 0;
630 INF_3C90X.ReceiveUPD.UpPktStatus = 0;
631 INF_3C90X.ReceiveUPD.DataAddr = virt_to_bus(nic->packet);
632 INF_3C90X.ReceiveUPD.DataLength = 1536 + (1<<31);
634 /** Submit the upload descriptor to the NIC **/
635 outl(virt_to_bus(&(INF_3C90X.ReceiveUPD)),
636 INF_3C90X.IOAddr + regUpListPtr_l);
638 /** Wait for upload completion (upComplete(15) or upError (14)) **/
639 for(i=0;i<40000;i++);
640 while((INF_3C90X.ReceiveUPD.UpPktStatus & ((1<<14) | (1<<15))) == 0)
641 for(i=0;i<40000;i++);
643 /** Check for Error (else we have good packet) **/
644 if (INF_3C90X.ReceiveUPD.UpPktStatus & (1<<14))
646 errcode = INF_3C90X.ReceiveUPD.UpPktStatus;
647 if (errcode & (1<<16))
648 printf("3C90X: Rx Overrun (%hX)\n",errcode>>16);
649 else if (errcode & (1<<17))
650 printf("3C90X: Runt Frame (%hX)\n",errcode>>16);
651 else if (errcode & (1<<18))
652 printf("3C90X: Alignment Error (%hX)\n",errcode>>16);
653 else if (errcode & (1<<19))
654 printf("3C90X: CRC Error (%hX)\n",errcode>>16);
655 else if (errcode & (1<<20))
656 printf("3C90X: Oversized Frame (%hX)\n",errcode>>16);
658 printf("3C90X: Packet error (%hX)\n",errcode>>16);
662 /** Ok, got packet. Set length in nic->packetlen. **/
663 nic->packetlen = (INF_3C90X.ReceiveUPD.UpPktStatus & 0x1FFF);
670 /*** a3c90x_disable: exported routine to disable the card. What's this for?
671 *** the eepro100.c driver didn't have one, so I just left this one empty too.
673 *** Must turn off receiver at least so stray packets will not corrupt memory
677 a3c90x_disable ( struct nic *nic __unused ) {
678 /* reset and disable merge */
680 /* Disable the receiver and transmitter. */
681 outw(cmdRxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w);
682 outw(cmdTxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w);
685 static void a3c90x_irq(struct nic *nic __unused, irq_action_t action __unused)
697 /*** a3c90x_probe: exported routine to probe for the 3c905 card and perform
698 *** initialization. If this routine is called, the pci functions did find the
699 *** card. We just have to init it here.
701 static int a3c90x_probe ( struct nic *nic, struct pci_device *pci ) {
704 unsigned short eeprom[0x21];
708 unsigned short linktype;
709 #define HWADDR_OFFSET 10
711 if (pci->ioaddr == 0)
714 adjust_pci_device(pci);
716 pci_fill_nic ( nic, pci );
718 nic->ioaddr = pci->ioaddr;
721 INF_3C90X.is3c556 = (pci->device == 0x6055);
722 INF_3C90X.IOAddr = pci->ioaddr & ~3;
723 INF_3C90X.CurrentWindow = 255;
724 switch (a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, 0x03))
726 case 0x9000: /** 10 Base TPO **/
727 case 0x9001: /** 10/100 T4 **/
728 case 0x9050: /** 10/100 TPO **/
729 case 0x9051: /** 10 Base Combo **/
730 INF_3C90X.isBrev = 0;
733 case 0x9004: /** 10 Base TPO **/
734 case 0x9005: /** 10 Base Combo **/
735 case 0x9006: /** 10 Base TPO and Base2 **/
736 case 0x900A: /** 10 Base FL **/
737 case 0x9055: /** 10/100 TPO **/
738 case 0x9056: /** 10/100 T4 **/
739 case 0x905A: /** 10 Base FX **/
741 INF_3C90X.isBrev = 1;
745 /** Load the EEPROM contents **/
746 if (INF_3C90X.isBrev)
750 eeprom[i] = a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, i);
753 #ifdef CFG_3C90X_BOOTROM_FIX
754 /** Set xcvrSelect in InternalConfig in eeprom. **/
755 /* only necessary for 3c905b revision cards with boot PROM bug!!! */
756 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x13, 0x0160);
759 #ifdef CFG_3C90X_XCVR
760 if (CFG_3C90X_XCVR == 255)
762 /** Clear the LanWorks register **/
763 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x16, 0);
767 /** Set the selected permanent-xcvrSelect in the
770 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x16,
771 XCVR_MAGIC + ((CFG_3C90X_XCVR) & 0x000F));
779 eeprom[i] = a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, i);
783 /** Print identification message **/
784 printf("\n\n3C90X Driver 2.00 "
785 "Copyright 1999 LightSys Technology Services, Inc.\n"
786 "Portions Copyright 1999 Steve Smith\n");
787 printf("Provided with ABSOLUTELY NO WARRANTY.\n");
788 #ifdef CFG_3C90X_BOOTROM_FIX
789 if (INF_3C90X.isBrev)
791 printf("NOTE: 3c905b bootrom fix enabled; has side "
792 "effects. See 3c90x.txt for info.\n");
795 printf("-------------------------------------------------------"
796 "------------------------\n");
798 /** Retrieve the Hardware address and print it on the screen. **/
799 INF_3C90X.HWAddr[0] = eeprom[HWADDR_OFFSET + 0]>>8;
800 INF_3C90X.HWAddr[1] = eeprom[HWADDR_OFFSET + 0]&0xFF;
801 INF_3C90X.HWAddr[2] = eeprom[HWADDR_OFFSET + 1]>>8;
802 INF_3C90X.HWAddr[3] = eeprom[HWADDR_OFFSET + 1]&0xFF;
803 INF_3C90X.HWAddr[4] = eeprom[HWADDR_OFFSET + 2]>>8;
804 INF_3C90X.HWAddr[5] = eeprom[HWADDR_OFFSET + 2]&0xFF;
805 printf("MAC Address = %!\n", INF_3C90X.HWAddr);
807 /** 3C556: Invert MII power **/
808 if (INF_3C90X.is3c556) {
810 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winAddressing2);
811 tmp = inw(INF_3C90X.IOAddr + regResetOptions_2_w);
813 outw(tmp, INF_3C90X.IOAddr + regResetOptions_2_w);
816 /* Test if the link is good, if not continue */
817 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winDiagnostics4);
818 mstat = inw(INF_3C90X.IOAddr + regMediaStatus_4_w);
819 if((mstat & (1<<11)) == 0) {
820 printf("Valid link not established\n");
824 /** Program the MAC address into the station address registers **/
825 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winAddressing2);
826 outw(htons(eeprom[HWADDR_OFFSET + 0]), INF_3C90X.IOAddr + regStationAddress_2_3w);
827 outw(htons(eeprom[HWADDR_OFFSET + 1]), INF_3C90X.IOAddr + regStationAddress_2_3w+2);
828 outw(htons(eeprom[HWADDR_OFFSET + 2]), INF_3C90X.IOAddr + regStationAddress_2_3w+4);
829 outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+0);
830 outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
831 outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
833 /** Fill in our entry in the etherboot arp table **/
834 for(i=0;i<ETH_ALEN;i++)
835 nic->node_addr[i] = (eeprom[HWADDR_OFFSET + i/2] >> (8*((i&1)^1))) & 0xff;
837 /** Read the media options register, print a message and set default
840 ** Uses Media Option command on B revision, Reset Option on non-B
841 ** revision cards -- same register address
843 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winTxRxOptions3);
844 mopt = inw(INF_3C90X.IOAddr + regResetMediaOptions_3_w);
846 /** mask out VCO bit that is defined as 10baseFL bit on B-rev cards **/
847 if (! INF_3C90X.isBrev)
852 printf("Connectors present: ");
857 printf("%s100Base-T4",(c++)?", ":"");
862 printf("%s100Base-FX",(c++)?", ":"");
867 printf("%s10Base-2",(c++)?", ":"");
872 printf("%sAUI",(c++)?", ":"");
877 printf("%sMII",(c++)?", ":"");
880 if ((mopt & 0xA) == 0xA)
882 printf("%s10Base-T / 100Base-TX",(c++)?", ":"");
885 else if ((mopt & 0xA) == 0x2)
887 printf("%s100Base-TX",(c++)?", ":"");
890 else if ((mopt & 0xA) == 0x8)
892 printf("%s10Base-T",(c++)?", ":"");
897 /** Determine transceiver type to use, depending on value stored in
900 if (INF_3C90X.isBrev)
902 if ((eeprom[0x16] & 0xFF00) == XCVR_MAGIC)
905 linktype = eeprom[0x16] & 0x000F;
910 #ifdef CFG_3C90X_XCVR
911 if (CFG_3C90X_XCVR != 255)
912 linktype = CFG_3C90X_XCVR;
913 #endif /* CFG_3C90X_XCVR */
915 /** I don't know what MII MAC only mode is!!! **/
916 if (linktype == 0x0009)
918 if (INF_3C90X.isBrev)
919 printf("WARNING: MII External MAC Mode only supported on B-revision "
920 "cards!!!!\nFalling Back to MII Mode\n");
925 /** enable DC converter for 10-Base-T **/
926 if (linktype == 0x0003)
928 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
931 /** Set the link to the type we just determined. **/
932 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winTxRxOptions3);
933 cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
935 cfg |= (linktype<<20);
936 outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
938 /** Now that we set the xcvr type, reset the Tx and Rx, re-enable. **/
939 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxReset, 0x00);
940 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
943 if (!INF_3C90X.isBrev)
944 outb(0x01, INF_3C90X.IOAddr + regTxFreeThresh_b);
946 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxEnable, 0);
949 ** reset of the receiver on B-revision cards re-negotiates the link
950 ** takes several seconds (a computer eternity)
952 if (INF_3C90X.isBrev)
953 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxReset, 0x04);
955 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxReset, 0x00);
956 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
959 /** Set the RX filter = receive only individual pkts & multicast & bcast. **/
960 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdSetRxFilter, 0x01 + 0x02 + 0x04);
961 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxEnable, 0);
965 ** set Indication and Interrupt flags , acknowledge any IRQ's
967 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdSetInterruptEnable, 0);
968 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
969 cmdSetIndicationEnable, 0x0014);
970 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
971 cmdAcknowledgeInterrupt, 0x661);
973 /** Set our exported functions **/
974 nic->nic_op = &a3c90x_operations;
978 static struct nic_operations a3c90x_operations = {
979 .connect = dummy_connect,
981 .transmit = a3c90x_transmit,
986 static struct pci_device_id a3c90x_nics[] = {
987 /* Original 90x revisions: */
988 PCI_ROM(0x10b7, 0x6055, "3c556", "3C556"), /* Huricane */
989 PCI_ROM(0x10b7, 0x9000, "3c905-tpo", "3Com900-TPO"), /* 10 Base TPO */
990 PCI_ROM(0x10b7, 0x9001, "3c905-t4", "3Com900-Combo"), /* 10/100 T4 */
991 PCI_ROM(0x10b7, 0x9050, "3c905-tpo100", "3Com905-TX"), /* 100 Base TX / 10/100 TPO */
992 PCI_ROM(0x10b7, 0x9051, "3c905-combo", "3Com905-T4"), /* 100 Base T4 / 10 Base Combo */
993 /* Newer 90xB revisions: */
994 PCI_ROM(0x10b7, 0x9004, "3c905b-tpo", "3Com900B-TPO"), /* 10 Base TPO */
995 PCI_ROM(0x10b7, 0x9005, "3c905b-combo", "3Com900B-Combo"), /* 10 Base Combo */
996 PCI_ROM(0x10b7, 0x9006, "3c905b-tpb2", "3Com900B-2/T"), /* 10 Base TP and Base2 */
997 PCI_ROM(0x10b7, 0x900a, "3c905b-fl", "3Com900B-FL"), /* 10 Base FL */
998 PCI_ROM(0x10b7, 0x9055, "3c905b-tpo100", "3Com905B-TX"), /* 10/100 TPO */
999 PCI_ROM(0x10b7, 0x9056, "3c905b-t4", "3Com905B-T4"), /* 10/100 T4 */
1000 PCI_ROM(0x10b7, 0x9058, "3c905b-9058", "3Com905B-9058"), /* Cyclone 10/100/BNC */
1001 PCI_ROM(0x10b7, 0x905a, "3c905b-fx", "3Com905B-FL"), /* 100 Base FX / 10 Base FX */
1002 /* Newer 90xC revision: */
1003 PCI_ROM(0x10b7, 0x9200, "3c905c-tpo", "3Com905C-TXM"), /* 10/100 TPO (3C905C-TXM) */
1004 PCI_ROM(0x10b7, 0x9202, "3c920b-emb-ati", "3c920B-EMB-WNM (ATI Radeon 9100 IGP)"), /* 3c920B-EMB-WNM (ATI Radeon 9100 IGP) */
1005 PCI_ROM(0x10b7, 0x9210, "3c920b-emb-wnm","3Com20B-EMB WNM"),
1006 PCI_ROM(0x10b7, 0x9800, "3c980", "3Com980-Cyclone"), /* Cyclone */
1007 PCI_ROM(0x10b7, 0x9805, "3c9805", "3Com9805"), /* Dual Port Server Cyclone */
1008 PCI_ROM(0x10b7, 0x7646, "3csoho100-tx", "3CSOHO100-TX"), /* Hurricane */
1009 PCI_ROM(0x10b7, 0x4500, "3c450", "3Com450 HomePNA Tornado"),
1010 PCI_ROM(0x10b7, 0x1201, "3c982a", "3Com982A"),
1011 PCI_ROM(0x10b7, 0x1202, "3c982b", "3Com982B"),
1014 PCI_DRIVER ( a3c90x_driver, a3c90x_nics, PCI_NO_CLASS );
1016 DRIVER ( "3C90X", nic_driver, pci_driver, a3c90x_driver,
1017 a3c90x_probe, a3c90x_disable );