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;
46 static struct pci_driver a3c90x_driver;
48 #define XCVR_MAGIC (0x5A00)
49 /** any single transmission fails after 16 collisions or other errors
50 ** this is the number of times to retry the transmission -- this should
53 #define XMIT_RETRIES 250
55 /*** Register definitions for the 3c905 ***/
58 regPowerMgmtCtrl_w = 0x7c, /** 905B Revision Only **/
59 regUpMaxBurst_w = 0x7a, /** 905B Revision Only **/
60 regDnMaxBurst_w = 0x78, /** 905B Revision Only **/
61 regDebugControl_w = 0x74, /** 905B Revision Only **/
62 regDebugData_l = 0x70, /** 905B Revision Only **/
63 regRealTimeCnt_l = 0x40, /** Universal **/
64 regUpBurstThresh_b = 0x3e, /** 905B Revision Only **/
65 regUpPoll_b = 0x3d, /** 905B Revision Only **/
66 regUpPriorityThresh_b = 0x3c, /** 905B Revision Only **/
67 regUpListPtr_l = 0x38, /** Universal **/
68 regCountdown_w = 0x36, /** Universal **/
69 regFreeTimer_w = 0x34, /** Universal **/
70 regUpPktStatus_l = 0x30, /** Universal with Exception, pg 130 **/
71 regTxFreeThresh_b = 0x2f, /** 90X Revision Only **/
72 regDnPoll_b = 0x2d, /** 905B Revision Only **/
73 regDnPriorityThresh_b = 0x2c, /** 905B Revision Only **/
74 regDnBurstThresh_b = 0x2a, /** 905B Revision Only **/
75 regDnListPtr_l = 0x24, /** Universal with Exception, pg 107 **/
76 regDmaCtrl_l = 0x20, /** Universal with Exception, pg 106 **/
78 regIntStatusAuto_w = 0x1e, /** 905B Revision Only **/
79 regTxStatus_b = 0x1b, /** Universal with Exception, pg 113 **/
80 regTimer_b = 0x1a, /** Universal **/
81 regTxPktId_b = 0x18, /** 905B Revision Only **/
82 regCommandIntStatus_w = 0x0e, /** Universal (Command Variations) **/
85 /** following are windowed registers **/
88 regPowerMgmtEvent_7_w = 0x0c, /** 905B Revision Only **/
89 regVlanEtherType_7_w = 0x04, /** 905B Revision Only **/
90 regVlanMask_7_w = 0x00, /** 905B Revision Only **/
95 regBytesXmittedOk_6_w = 0x0c, /** Universal **/
96 regBytesRcvdOk_6_w = 0x0a, /** Universal **/
97 regUpperFramesOk_6_b = 0x09, /** Universal **/
98 regFramesDeferred_6_b = 0x08, /** Universal **/
99 regFramesRecdOk_6_b = 0x07, /** Universal with Exceptions, pg 142 **/
100 regFramesXmittedOk_6_b = 0x06, /** Universal **/
101 regRxOverruns_6_b = 0x05, /** Universal **/
102 regLateCollisions_6_b = 0x04, /** Universal **/
103 regSingleCollisions_6_b = 0x03, /** Universal **/
104 regMultipleCollisions_6_b = 0x02, /** Universal **/
105 regSqeErrors_6_b = 0x01, /** Universal **/
106 regCarrierLost_6_b = 0x00, /** Universal **/
111 regIndicationEnable_5_w = 0x0c, /** Universal **/
112 regInterruptEnable_5_w = 0x0a, /** Universal **/
113 regTxReclaimThresh_5_b = 0x09, /** 905B Revision Only **/
114 regRxFilter_5_b = 0x08, /** Universal **/
115 regRxEarlyThresh_5_w = 0x06, /** Universal **/
116 regTxStartThresh_5_w = 0x00, /** Universal **/
121 regUpperBytesOk_4_b = 0x0d, /** Universal **/
122 regBadSSD_4_b = 0x0c, /** Universal **/
123 regMediaStatus_4_w = 0x0a, /** Universal with Exceptions, pg 201 **/
124 regPhysicalMgmt_4_w = 0x08, /** Universal **/
125 regNetworkDiagnostic_4_w = 0x06, /** Universal with Exceptions, pg 203 **/
126 regFifoDiagnostic_4_w = 0x04, /** Universal with Exceptions, pg 196 **/
127 regVcoDiagnostic_4_w = 0x02, /** Undocumented? **/
132 regTxFree_3_w = 0x0c, /** Universal **/
133 regRxFree_3_w = 0x0a, /** Universal with Exceptions, pg 125 **/
134 regResetMediaOptions_3_w = 0x08, /** Media Options on B Revision, **/
135 /** Reset Options on Non-B Revision **/
136 regMacControl_3_w = 0x06, /** Universal with Exceptions, pg 199 **/
137 regMaxPktSize_3_w = 0x04, /** 905B Revision Only **/
138 regInternalConfig_3_l = 0x00, /** Universal, different bit **/
139 /** definitions, pg 59 **/
144 regResetOptions_2_w = 0x0c, /** 905B Revision Only **/
145 regStationMask_2_3w = 0x06, /** Universal with Exceptions, pg 127 **/
146 regStationAddress_2_3w = 0x00, /** Universal with Exceptions, pg 127 **/
151 regRxStatus_1_w = 0x0a, /** 90X Revision Only, Pg 126 **/
156 regEepromData_0_w = 0x0c, /** Universal **/
157 regEepromCommand_0_w = 0x0a, /** Universal **/
158 regBiosRomData_0_b = 0x08, /** 905B Revision Only **/
159 regBiosRomAddr_0_l = 0x04, /** 905B Revision Only **/
163 /*** The names for the eight register windows ***/
166 winPowerVlan7 = 0x07,
167 winStatistics6 = 0x06,
168 winTxRxControl5 = 0x05,
169 winDiagnostics4 = 0x04,
170 winTxRxOptions3 = 0x03,
171 winAddressing2 = 0x02,
173 winEepromBios0 = 0x00,
177 /*** Command definitions for the 3c90X ***/
180 cmdGlobalReset = 0x00, /** Universal with Exceptions, pg 151 **/
181 cmdSelectRegisterWindow = 0x01, /** Universal **/
182 cmdEnableDcConverter = 0x02, /** **/
183 cmdRxDisable = 0x03, /** **/
184 cmdRxEnable = 0x04, /** Universal **/
185 cmdRxReset = 0x05, /** Universal **/
186 cmdStallCtl = 0x06, /** Universal **/
187 cmdTxEnable = 0x09, /** Universal **/
188 cmdTxDisable = 0x0A, /** **/
189 cmdTxReset = 0x0B, /** Universal **/
190 cmdRequestInterrupt = 0x0C, /** **/
191 cmdAcknowledgeInterrupt = 0x0D, /** Universal **/
192 cmdSetInterruptEnable = 0x0E, /** Universal **/
193 cmdSetIndicationEnable = 0x0F, /** Universal **/
194 cmdSetRxFilter = 0x10, /** Universal **/
195 cmdSetRxEarlyThresh = 0x11, /** **/
196 cmdSetTxStartThresh = 0x13, /** **/
197 cmdStatisticsEnable = 0x15, /** **/
198 cmdStatisticsDisable = 0x16, /** **/
199 cmdDisableDcConverter = 0x17, /** **/
200 cmdSetTxReclaimThresh = 0x18, /** **/
201 cmdSetHashFilterBit = 0x19, /** **/
205 /*** Values for int status register bitmask **/
206 #define INT_INTERRUPTLATCH (1<<0)
207 #define INT_HOSTERROR (1<<1)
208 #define INT_TXCOMPLETE (1<<2)
209 #define INT_RXCOMPLETE (1<<4)
210 #define INT_RXEARLY (1<<5)
211 #define INT_INTREQUESTED (1<<6)
212 #define INT_UPDATESTATS (1<<7)
213 #define INT_LINKEVENT (1<<8)
214 #define INT_DNCOMPLETE (1<<9)
215 #define INT_UPCOMPLETE (1<<10)
216 #define INT_CMDINPROGRESS (1<<12)
217 #define INT_WINDOWNUMBER (7<<13)
220 /*** TX descriptor ***/
223 unsigned int DnNextPtr;
224 unsigned int FrameStartHeader;
225 unsigned int HdrAddr;
226 unsigned int HdrLength;
227 unsigned int DataAddr;
228 unsigned int DataLength;
230 TXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
232 /*** RX descriptor ***/
235 unsigned int UpNextPtr;
236 unsigned int UpPktStatus;
237 unsigned int DataAddr;
238 unsigned int DataLength;
240 RXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
242 /*** Global variables ***/
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 outw(address + ((0x02)<<6), ioaddr + regEepromCommand_0_w);
309 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
310 val = inw(ioaddr + regEepromData_0_w);
317 /*** a3c90x_internal_WriteEepromWord - write a physical word of
318 *** data to the onboard serial eeprom (not the BIOS prom, but the
319 *** nvram in the card that stores, among other things, the MAC
323 a3c90x_internal_WriteEepromWord(int ioaddr, int address, unsigned short value)
325 /** Select register window **/
326 a3c90x_internal_SetWindow(ioaddr, winEepromBios0);
328 /** Verify Eeprom not busy **/
329 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
331 /** Issue WriteEnable, and wait for completion. **/
332 outw(0x30, ioaddr + regEepromCommand_0_w);
333 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
335 /** Issue EraseRegister, and wait for completion. **/
336 outw(address + ((0x03)<<6), ioaddr + regEepromCommand_0_w);
337 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
339 /** Send the new data to the eeprom, and wait for completion. **/
340 outw(value, ioaddr + regEepromData_0_w);
341 outw(0x30, ioaddr + regEepromCommand_0_w);
342 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
344 /** Burn the new data into the eeprom, and wait for completion. **/
345 outw(address + ((0x01)<<6), ioaddr + regEepromCommand_0_w);
346 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
353 /*** a3c90x_internal_WriteEeprom - write data to the serial eeprom,
354 *** and re-compute the eeprom checksum.
357 a3c90x_internal_WriteEeprom(int ioaddr, int address, unsigned short value)
361 int maxAddress, cksumAddress;
363 if (INF_3C90X.isBrev)
374 /** Write the value. **/
375 if (a3c90x_internal_WriteEepromWord(ioaddr, address, value) == -1)
378 /** Recompute the checksum. **/
379 for(i=0;i<=maxAddress;i++)
381 v = a3c90x_internal_ReadEeprom(ioaddr, i);
383 cksum ^= ((v>>8) & 0xFF);
385 /** Write the checksum to the location in the eeprom **/
386 if (a3c90x_internal_WriteEepromWord(ioaddr, cksumAddress, cksum) == -1)
393 /*** a3c90x_reset: exported function that resets the card to its default
394 *** state. This is so the Linux driver can re-set the card up the way
395 *** it wants to. If CFG_3C90X_PRESERVE_XCVR is defined, then the reset will
396 *** not alter the selected transceiver that we used to download the boot
399 static void a3c90x_reset(void)
401 #ifdef CFG_3C90X_PRESERVE_XCVR
403 /** Read the current InternalConfig value. **/
404 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winTxRxOptions3);
405 cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
408 /** Send the reset command to the card **/
409 printf("Issuing RESET:\n");
410 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdGlobalReset, 0);
412 /** wait for reset command to complete **/
413 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS);
415 /** global reset command resets station mask, non-B revision cards
416 ** require explicit reset of values
418 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winAddressing2);
419 outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+0);
420 outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
421 outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
423 #ifdef CFG_3C90X_PRESERVE_XCVR
424 /** Re-set the original InternalConfig value from before reset **/
425 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winTxRxOptions3);
426 outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
428 /** enable DC converter for 10-Base-T **/
429 if ((cfg&0x0300) == 0x0300)
431 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
435 /** Issue transmit reset, wait for command completion **/
436 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxReset, 0);
437 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
439 if (! INF_3C90X.isBrev)
440 outb(0x01, INF_3C90X.IOAddr + regTxFreeThresh_b);
441 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxEnable, 0);
444 ** reset of the receiver on B-revision cards re-negotiates the link
445 ** takes several seconds (a computer eternity)
447 if (INF_3C90X.isBrev)
448 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxReset, 0x04);
450 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxReset, 0x00);
451 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS);
453 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxEnable, 0);
455 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
456 cmdSetInterruptEnable, 0);
457 /** enable rxComplete and txComplete **/
458 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
459 cmdSetIndicationEnable, 0x0014);
460 /** acknowledge any pending status flags **/
461 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
462 cmdAcknowledgeInterrupt, 0x661);
469 /*** a3c90x_transmit: exported function that transmits a packet. Does not
470 *** return any particular status. Parameters are:
471 *** d[6] - destination address, ethernet;
472 *** t - protocol type (ARP, IP, etc);
473 *** s - size of the non-header part of the packet that needs transmitted;
474 *** p - the pointer to the packet data itself.
477 a3c90x_transmit(struct nic *nic __unused, const char *d, unsigned int t,
478 unsigned int s, const char *p)
483 unsigned char dst_addr[ETH_ALEN];
484 unsigned char src_addr[ETH_ALEN];
488 unsigned char status;
491 for (retries=0; retries < XMIT_RETRIES ; retries++)
493 /** Stall the download engine **/
494 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdStallCtl, 2);
496 /** Make sure the card is not waiting on us **/
497 inw(INF_3C90X.IOAddr + regCommandIntStatus_w);
498 inw(INF_3C90X.IOAddr + regCommandIntStatus_w);
500 while (inw(INF_3C90X.IOAddr+regCommandIntStatus_w) &
504 /** Set the ethernet packet type **/
507 /** Copy the destination address **/
508 memcpy(hdr.dst_addr, d, ETH_ALEN);
510 /** Copy our MAC address **/
511 memcpy(hdr.src_addr, INF_3C90X.HWAddr, ETH_ALEN);
513 /** Setup the DPD (download descriptor) **/
514 INF_3C90X.TransmitDPD.DnNextPtr = 0;
515 /** set notification for transmission completion (bit 15) **/
516 INF_3C90X.TransmitDPD.FrameStartHeader = (s + sizeof(hdr)) | 0x8000;
517 INF_3C90X.TransmitDPD.HdrAddr = virt_to_bus(&hdr);
518 INF_3C90X.TransmitDPD.HdrLength = sizeof(hdr);
519 INF_3C90X.TransmitDPD.DataAddr = virt_to_bus(p);
520 INF_3C90X.TransmitDPD.DataLength = s + (1<<31);
522 /** Send the packet **/
523 outl(virt_to_bus(&(INF_3C90X.TransmitDPD)),
524 INF_3C90X.IOAddr + regDnListPtr_l);
526 /** End Stall and Wait for upload to complete. **/
527 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdStallCtl, 3);
528 while(inl(INF_3C90X.IOAddr + regDnListPtr_l) != 0)
531 /** Wait for NIC Transmit to Complete **/
532 load_timer2(10*TICKS_PER_MS); /* Give it 10 ms */
533 while (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0004) &&
537 if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0004))
539 printf("3C90X: Tx Timeout\n");
543 status = inb(INF_3C90X.IOAddr + regTxStatus_b);
545 /** acknowledge transmit interrupt by writing status **/
546 outb(0x00, INF_3C90X.IOAddr + regTxStatus_b);
548 /** successful completion (sans "interrupt Requested" bit) **/
549 if ((status & 0xbf) == 0x80)
552 printf("3C90X: Status (%hhX)\n", status);
553 /** check error codes **/
556 printf("3C90X: Tx Reclaim Error (%hhX)\n", status);
559 else if (status & 0x04)
561 printf("3C90X: Tx Status Overflow (%hhX)\n", status);
563 outb(0x00, INF_3C90X.IOAddr + regTxStatus_b);
564 /** must re-enable after max collisions before re-issuing tx **/
565 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxEnable, 0);
567 else if (status & 0x08)
569 printf("3C90X: Tx Max Collisions (%hhX)\n", status);
570 /** must re-enable after max collisions before re-issuing tx **/
571 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxEnable, 0);
573 else if (status & 0x10)
575 printf("3C90X: Tx Underrun (%hhX)\n", status);
578 else if (status & 0x20)
580 printf("3C90X: Tx Jabber (%hhX)\n", status);
583 else if ((status & 0x80) != 0x80)
585 printf("3C90X: Internal Error - Incomplete Transmission (%hhX)\n",
591 /** failed after RETRY attempts **/
592 printf("Failed to send after %d retries\n", retries);
599 /*** a3c90x_poll: exported routine that waits for a certain length of time
600 *** for a packet, and if it sees none, returns 0. This routine should
601 *** copy the packet to nic->packet if it gets a packet and set the size
602 *** in nic->packetlen. Return 1 if a packet was found.
605 a3c90x_poll(struct nic *nic, int retrieve)
609 if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0010))
614 if ( ! retrieve ) return 1;
616 /** we don't need to acknowledge rxComplete -- the upload engine
620 /** Build the up-load descriptor **/
621 INF_3C90X.ReceiveUPD.UpNextPtr = 0;
622 INF_3C90X.ReceiveUPD.UpPktStatus = 0;
623 INF_3C90X.ReceiveUPD.DataAddr = virt_to_bus(nic->packet);
624 INF_3C90X.ReceiveUPD.DataLength = 1536 + (1<<31);
626 /** Submit the upload descriptor to the NIC **/
627 outl(virt_to_bus(&(INF_3C90X.ReceiveUPD)),
628 INF_3C90X.IOAddr + regUpListPtr_l);
630 /** Wait for upload completion (upComplete(15) or upError (14)) **/
631 for(i=0;i<40000;i++);
632 while((INF_3C90X.ReceiveUPD.UpPktStatus & ((1<<14) | (1<<15))) == 0)
633 for(i=0;i<40000;i++);
635 /** Check for Error (else we have good packet) **/
636 if (INF_3C90X.ReceiveUPD.UpPktStatus & (1<<14))
638 errcode = INF_3C90X.ReceiveUPD.UpPktStatus;
639 if (errcode & (1<<16))
640 printf("3C90X: Rx Overrun (%hX)\n",errcode>>16);
641 else if (errcode & (1<<17))
642 printf("3C90X: Runt Frame (%hX)\n",errcode>>16);
643 else if (errcode & (1<<18))
644 printf("3C90X: Alignment Error (%hX)\n",errcode>>16);
645 else if (errcode & (1<<19))
646 printf("3C90X: CRC Error (%hX)\n",errcode>>16);
647 else if (errcode & (1<<20))
648 printf("3C90X: Oversized Frame (%hX)\n",errcode>>16);
650 printf("3C90X: Packet error (%hX)\n",errcode>>16);
654 /** Ok, got packet. Set length in nic->packetlen. **/
655 nic->packetlen = (INF_3C90X.ReceiveUPD.UpPktStatus & 0x1FFF);
662 /*** a3c90x_disable: exported routine to disable the card. What's this for?
663 *** the eepro100.c driver didn't have one, so I just left this one empty too.
665 *** Must turn off receiver at least so stray packets will not corrupt memory
669 a3c90x_disable ( struct nic *nic __unused ) {
670 /* reset and disable merge */
672 /* Disable the receiver and transmitter. */
673 outw(cmdRxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w);
674 outw(cmdTxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w);
677 static void a3c90x_irq(struct nic *nic __unused, irq_action_t action __unused)
689 /*** a3c90x_probe: exported routine to probe for the 3c905 card and perform
690 *** initialization. If this routine is called, the pci functions did find the
691 *** card. We just have to init it here.
693 static int a3c90x_probe ( struct nic *nic, struct pci_device *pci ) {
696 unsigned short eeprom[0x21];
700 unsigned short linktype;
701 #define HWADDR_OFFSET 10
703 if (pci->ioaddr == 0)
706 adjust_pci_device(pci);
708 pci_fill_nic ( nic, pci );
710 nic->ioaddr = pci->ioaddr;
713 INF_3C90X.IOAddr = pci->ioaddr & ~3;
714 INF_3C90X.CurrentWindow = 255;
715 switch (a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, 0x03))
717 case 0x9000: /** 10 Base TPO **/
718 case 0x9001: /** 10/100 T4 **/
719 case 0x9050: /** 10/100 TPO **/
720 case 0x9051: /** 10 Base Combo **/
721 INF_3C90X.isBrev = 0;
724 case 0x9004: /** 10 Base TPO **/
725 case 0x9005: /** 10 Base Combo **/
726 case 0x9006: /** 10 Base TPO and Base2 **/
727 case 0x900A: /** 10 Base FL **/
728 case 0x9055: /** 10/100 TPO **/
729 case 0x9056: /** 10/100 T4 **/
730 case 0x905A: /** 10 Base FX **/
732 INF_3C90X.isBrev = 1;
736 /** Load the EEPROM contents **/
737 if (INF_3C90X.isBrev)
741 eeprom[i] = a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, i);
744 #ifdef CFG_3C90X_BOOTROM_FIX
745 /** Set xcvrSelect in InternalConfig in eeprom. **/
746 /* only necessary for 3c905b revision cards with boot PROM bug!!! */
747 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x13, 0x0160);
750 #ifdef CFG_3C90X_XCVR
751 if (CFG_3C90X_XCVR == 255)
753 /** Clear the LanWorks register **/
754 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x16, 0);
758 /** Set the selected permanent-xcvrSelect in the
761 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x16,
762 XCVR_MAGIC + ((CFG_3C90X_XCVR) & 0x000F));
770 eeprom[i] = a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, i);
774 /** Print identification message **/
775 printf("\n\n3C90X Driver 2.00 "
776 "Copyright 1999 LightSys Technology Services, Inc.\n"
777 "Portions Copyright 1999 Steve Smith\n");
778 printf("Provided with ABSOLUTELY NO WARRANTY.\n");
779 #ifdef CFG_3C90X_BOOTROM_FIX
780 if (INF_3C90X.isBrev)
782 printf("NOTE: 3c905b bootrom fix enabled; has side "
783 "effects. See 3c90x.txt for info.\n");
786 printf("-------------------------------------------------------"
787 "------------------------\n");
789 /** Retrieve the Hardware address and print it on the screen. **/
790 INF_3C90X.HWAddr[0] = eeprom[HWADDR_OFFSET + 0]>>8;
791 INF_3C90X.HWAddr[1] = eeprom[HWADDR_OFFSET + 0]&0xFF;
792 INF_3C90X.HWAddr[2] = eeprom[HWADDR_OFFSET + 1]>>8;
793 INF_3C90X.HWAddr[3] = eeprom[HWADDR_OFFSET + 1]&0xFF;
794 INF_3C90X.HWAddr[4] = eeprom[HWADDR_OFFSET + 2]>>8;
795 INF_3C90X.HWAddr[5] = eeprom[HWADDR_OFFSET + 2]&0xFF;
796 printf("MAC Address = %!\n", INF_3C90X.HWAddr);
798 /* Test if the link is good, if not continue */
799 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winDiagnostics4);
800 mstat = inw(INF_3C90X.IOAddr + regMediaStatus_4_w);
801 if((mstat & (1<<11)) == 0) {
802 printf("Valid link not established\n");
806 /** Program the MAC address into the station address registers **/
807 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winAddressing2);
808 outw(htons(eeprom[HWADDR_OFFSET + 0]), INF_3C90X.IOAddr + regStationAddress_2_3w);
809 outw(htons(eeprom[HWADDR_OFFSET + 1]), INF_3C90X.IOAddr + regStationAddress_2_3w+2);
810 outw(htons(eeprom[HWADDR_OFFSET + 2]), INF_3C90X.IOAddr + regStationAddress_2_3w+4);
811 outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+0);
812 outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
813 outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
815 /** Fill in our entry in the etherboot arp table **/
816 for(i=0;i<ETH_ALEN;i++)
817 nic->node_addr[i] = (eeprom[HWADDR_OFFSET + i/2] >> (8*((i&1)^1))) & 0xff;
819 /** Read the media options register, print a message and set default
822 ** Uses Media Option command on B revision, Reset Option on non-B
823 ** revision cards -- same register address
825 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winTxRxOptions3);
826 mopt = inw(INF_3C90X.IOAddr + regResetMediaOptions_3_w);
828 /** mask out VCO bit that is defined as 10baseFL bit on B-rev cards **/
829 if (! INF_3C90X.isBrev)
834 printf("Connectors present: ");
839 printf("%s100Base-T4",(c++)?", ":"");
844 printf("%s100Base-FX",(c++)?", ":"");
849 printf("%s10Base-2",(c++)?", ":"");
854 printf("%sAUI",(c++)?", ":"");
859 printf("%sMII",(c++)?", ":"");
862 if ((mopt & 0xA) == 0xA)
864 printf("%s10Base-T / 100Base-TX",(c++)?", ":"");
867 else if ((mopt & 0xA) == 0x2)
869 printf("%s100Base-TX",(c++)?", ":"");
872 else if ((mopt & 0xA) == 0x8)
874 printf("%s10Base-T",(c++)?", ":"");
879 /** Determine transceiver type to use, depending on value stored in
882 if (INF_3C90X.isBrev)
884 if ((eeprom[0x16] & 0xFF00) == XCVR_MAGIC)
887 linktype = eeprom[0x16] & 0x000F;
892 #ifdef CFG_3C90X_XCVR
893 if (CFG_3C90X_XCVR != 255)
894 linktype = CFG_3C90X_XCVR;
895 #endif /* CFG_3C90X_XCVR */
897 /** I don't know what MII MAC only mode is!!! **/
898 if (linktype == 0x0009)
900 if (INF_3C90X.isBrev)
901 printf("WARNING: MII External MAC Mode only supported on B-revision "
902 "cards!!!!\nFalling Back to MII Mode\n");
907 /** enable DC converter for 10-Base-T **/
908 if (linktype == 0x0003)
910 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
913 /** Set the link to the type we just determined. **/
914 a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winTxRxOptions3);
915 cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
917 cfg |= (linktype<<20);
918 outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
920 /** Now that we set the xcvr type, reset the Tx and Rx, re-enable. **/
921 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxReset, 0x00);
922 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
925 if (!INF_3C90X.isBrev)
926 outb(0x01, INF_3C90X.IOAddr + regTxFreeThresh_b);
928 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxEnable, 0);
931 ** reset of the receiver on B-revision cards re-negotiates the link
932 ** takes several seconds (a computer eternity)
934 if (INF_3C90X.isBrev)
935 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxReset, 0x04);
937 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxReset, 0x00);
938 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
941 /** Set the RX filter = receive only individual pkts & multicast & bcast. **/
942 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdSetRxFilter, 0x01 + 0x02 + 0x04);
943 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxEnable, 0);
947 ** set Indication and Interrupt flags , acknowledge any IRQ's
949 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdSetInterruptEnable, 0);
950 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
951 cmdSetIndicationEnable, 0x0014);
952 a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
953 cmdAcknowledgeInterrupt, 0x661);
955 /** Set our exported functions **/
956 nic->nic_op = &a3c90x_operations;
960 static struct nic_operations a3c90x_operations = {
961 .connect = dummy_connect,
963 .transmit = a3c90x_transmit,
968 static struct pci_id a3c90x_nics[] = {
969 /* Original 90x revisions: */
970 PCI_ROM(0x10b7, 0x9000, "3c905-tpo", "3Com900-TPO"), /* 10 Base TPO */
971 PCI_ROM(0x10b7, 0x9001, "3c905-t4", "3Com900-Combo"), /* 10/100 T4 */
972 PCI_ROM(0x10b7, 0x9050, "3c905-tpo100", "3Com905-TX"), /* 100 Base TX / 10/100 TPO */
973 PCI_ROM(0x10b7, 0x9051, "3c905-combo", "3Com905-T4"), /* 100 Base T4 / 10 Base Combo */
974 /* Newer 90xB revisions: */
975 PCI_ROM(0x10b7, 0x9004, "3c905b-tpo", "3Com900B-TPO"), /* 10 Base TPO */
976 PCI_ROM(0x10b7, 0x9005, "3c905b-combo", "3Com900B-Combo"), /* 10 Base Combo */
977 PCI_ROM(0x10b7, 0x9006, "3c905b-tpb2", "3Com900B-2/T"), /* 10 Base TP and Base2 */
978 PCI_ROM(0x10b7, 0x900a, "3c905b-fl", "3Com900B-FL"), /* 10 Base FL */
979 PCI_ROM(0x10b7, 0x9055, "3c905b-tpo100", "3Com905B-TX"), /* 10/100 TPO */
980 PCI_ROM(0x10b7, 0x9056, "3c905b-t4", "3Com905B-T4"), /* 10/100 T4 */
981 PCI_ROM(0x10b7, 0x9058, "3c905b-9058", "3Com905B-9058"), /* Cyclone 10/100/BNC */
982 PCI_ROM(0x10b7, 0x905a, "3c905b-fx", "3Com905B-FL"), /* 100 Base FX / 10 Base FX */
983 /* Newer 90xC revision: */
984 PCI_ROM(0x10b7, 0x9200, "3c905c-tpo", "3Com905C-TXM"), /* 10/100 TPO (3C905C-TXM) */
985 PCI_ROM(0x10b7, 0x9202, "3c920b-emb-ati", "3c920B-EMB-WNM (ATI Radeon 9100 IGP)"), /* 3c920B-EMB-WNM (ATI Radeon 9100 IGP) */
986 PCI_ROM(0x10b7, 0x9210, "3c920b-emb-wnm","3Com20B-EMB WNM"),
987 PCI_ROM(0x10b7, 0x9800, "3c980", "3Com980-Cyclone"), /* Cyclone */
988 PCI_ROM(0x10b7, 0x9805, "3c9805", "3Com9805"), /* Dual Port Server Cyclone */
989 PCI_ROM(0x10b7, 0x7646, "3csoho100-tx", "3CSOHO100-TX"), /* Hurricane */
990 PCI_ROM(0x10b7, 0x4500, "3c450", "3Com450 HomePNA Tornado"),
991 PCI_ROM(0x10b7, 0x1201, "3c982a", "3Com982A"),
992 PCI_ROM(0x10b7, 0x1202, "3c982b", "3Com982B"),
995 static struct pci_driver a3c90x_driver =
996 PCI_DRIVER ( a3c90x_nics, PCI_NO_CLASS );
998 DRIVER ( "3C90X", nic_driver, pci_driver, a3c90x_driver,
999 a3c90x_probe, a3c90x_disable );