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-compat.h"
45 #include <pci-bother.h>
50 #define XCVR_MAGIC (0x5A00)
51 /** any single transmission fails after 16 collisions or other errors
52 ** this is the number of times to retry the transmission -- this should
55 #define XMIT_RETRIES 5
57 /*** Register definitions for the 3c905 ***/
60 regPowerMgmtCtrl_w = 0x7c, /** 905B Revision Only **/
61 regUpMaxBurst_w = 0x7a, /** 905B Revision Only **/
62 regDnMaxBurst_w = 0x78, /** 905B Revision Only **/
63 regDebugControl_w = 0x74, /** 905B Revision Only **/
64 regDebugData_l = 0x70, /** 905B Revision Only **/
65 regRealTimeCnt_l = 0x40, /** Universal **/
66 regUpBurstThresh_b = 0x3e, /** 905B Revision Only **/
67 regUpPoll_b = 0x3d, /** 905B Revision Only **/
68 regUpPriorityThresh_b = 0x3c, /** 905B Revision Only **/
69 regUpListPtr_l = 0x38, /** Universal **/
70 regCountdown_w = 0x36, /** Universal **/
71 regFreeTimer_w = 0x34, /** Universal **/
72 regUpPktStatus_l = 0x30, /** Universal with Exception, pg 130 **/
73 regTxFreeThresh_b = 0x2f, /** 90X Revision Only **/
74 regDnPoll_b = 0x2d, /** 905B Revision Only **/
75 regDnPriorityThresh_b = 0x2c, /** 905B Revision Only **/
76 regDnBurstThresh_b = 0x2a, /** 905B Revision Only **/
77 regDnListPtr_l = 0x24, /** Universal with Exception, pg 107 **/
78 regDmaCtrl_l = 0x20, /** Universal with Exception, pg 106 **/
80 regIntStatusAuto_w = 0x1e, /** 905B Revision Only **/
81 regTxStatus_b = 0x1b, /** Universal with Exception, pg 113 **/
82 regTimer_b = 0x1a, /** Universal **/
83 regTxPktId_b = 0x18, /** 905B Revision Only **/
84 regCommandIntStatus_w = 0x0e, /** Universal (Command Variations) **/
87 /** following are windowed registers **/
90 regPowerMgmtEvent_7_w = 0x0c, /** 905B Revision Only **/
91 regVlanEtherType_7_w = 0x04, /** 905B Revision Only **/
92 regVlanMask_7_w = 0x00, /** 905B Revision Only **/
97 regBytesXmittedOk_6_w = 0x0c, /** Universal **/
98 regBytesRcvdOk_6_w = 0x0a, /** Universal **/
99 regUpperFramesOk_6_b = 0x09, /** Universal **/
100 regFramesDeferred_6_b = 0x08, /** Universal **/
101 regFramesRecdOk_6_b = 0x07, /** Universal with Exceptions, pg 142 **/
102 regFramesXmittedOk_6_b = 0x06, /** Universal **/
103 regRxOverruns_6_b = 0x05, /** Universal **/
104 regLateCollisions_6_b = 0x04, /** Universal **/
105 regSingleCollisions_6_b = 0x03, /** Universal **/
106 regMultipleCollisions_6_b = 0x02, /** Universal **/
107 regSqeErrors_6_b = 0x01, /** Universal **/
108 regCarrierLost_6_b = 0x00, /** Universal **/
113 regIndicationEnable_5_w = 0x0c, /** Universal **/
114 regInterruptEnable_5_w = 0x0a, /** Universal **/
115 regTxReclaimThresh_5_b = 0x09, /** 905B Revision Only **/
116 regRxFilter_5_b = 0x08, /** Universal **/
117 regRxEarlyThresh_5_w = 0x06, /** Universal **/
118 regTxStartThresh_5_w = 0x00, /** Universal **/
123 regUpperBytesOk_4_b = 0x0d, /** Universal **/
124 regBadSSD_4_b = 0x0c, /** Universal **/
125 regMediaStatus_4_w = 0x0a, /** Universal with Exceptions, pg 201 **/
126 regPhysicalMgmt_4_w = 0x08, /** Universal **/
127 regNetworkDiagnostic_4_w = 0x06, /** Universal with Exceptions, pg 203 **/
128 regFifoDiagnostic_4_w = 0x04, /** Universal with Exceptions, pg 196 **/
129 regVcoDiagnostic_4_w = 0x02, /** Undocumented? **/
134 regTxFree_3_w = 0x0c, /** Universal **/
135 regRxFree_3_w = 0x0a, /** Universal with Exceptions, pg 125 **/
136 regResetMediaOptions_3_w = 0x08, /** Media Options on B Revision, **/
137 /** Reset Options on Non-B Revision **/
138 regMacControl_3_w = 0x06, /** Universal with Exceptions, pg 199 **/
139 regMaxPktSize_3_w = 0x04, /** 905B Revision Only **/
140 regInternalConfig_3_l = 0x00, /** Universal, different bit **/
141 /** definitions, pg 59 **/
146 regResetOptions_2_w = 0x0c, /** 905B Revision Only **/
147 regStationMask_2_3w = 0x06, /** Universal with Exceptions, pg 127 **/
148 regStationAddress_2_3w = 0x00, /** Universal with Exceptions, pg 127 **/
153 regRxStatus_1_w = 0x0a, /** 90X Revision Only, Pg 126 **/
158 regEepromData_0_w = 0x0c, /** Universal **/
159 regEepromCommand_0_w = 0x0a, /** Universal **/
160 regBiosRomData_0_b = 0x08, /** 905B Revision Only **/
161 regBiosRomAddr_0_l = 0x04, /** 905B Revision Only **/
165 /*** The names for the eight register windows ***/
168 winPowerVlan7 = 0x07,
169 winStatistics6 = 0x06,
170 winTxRxControl5 = 0x05,
171 winDiagnostics4 = 0x04,
172 winTxRxOptions3 = 0x03,
173 winAddressing2 = 0x02,
175 winEepromBios0 = 0x00,
179 /*** Command definitions for the 3c90X ***/
182 cmdGlobalReset = 0x00, /** Universal with Exceptions, pg 151 **/
183 cmdSelectRegisterWindow = 0x01, /** Universal **/
184 cmdEnableDcConverter = 0x02, /** **/
185 cmdRxDisable = 0x03, /** **/
186 cmdRxEnable = 0x04, /** Universal **/
187 cmdRxReset = 0x05, /** Universal **/
188 cmdStallCtl = 0x06, /** Universal **/
189 cmdTxEnable = 0x09, /** Universal **/
190 cmdTxDisable = 0x0A, /** **/
191 cmdTxReset = 0x0B, /** Universal **/
192 cmdRequestInterrupt = 0x0C, /** **/
193 cmdAcknowledgeInterrupt = 0x0D, /** Universal **/
194 cmdSetInterruptEnable = 0x0E, /** Universal **/
195 cmdSetIndicationEnable = 0x0F, /** Universal **/
196 cmdSetRxFilter = 0x10, /** Universal **/
197 cmdSetRxEarlyThresh = 0x11, /** **/
198 cmdSetTxStartThresh = 0x13, /** **/
199 cmdStatisticsEnable = 0x15, /** **/
200 cmdStatisticsDisable = 0x16, /** **/
201 cmdDisableDcConverter = 0x17, /** **/
202 cmdSetTxReclaimThresh = 0x18, /** **/
203 cmdSetHashFilterBit = 0x19, /** **/
207 /*** Values for int status register bitmask **/
208 #define INT_INTERRUPTLATCH (1<<0)
209 #define INT_HOSTERROR (1<<1)
210 #define INT_TXCOMPLETE (1<<2)
211 #define INT_RXCOMPLETE (1<<4)
212 #define INT_RXEARLY (1<<5)
213 #define INT_INTREQUESTED (1<<6)
214 #define INT_UPDATESTATS (1<<7)
215 #define INT_LINKEVENT (1<<8)
216 #define INT_DNCOMPLETE (1<<9)
217 #define INT_UPCOMPLETE (1<<10)
218 #define INT_CMDINPROGRESS (1<<12)
219 #define INT_WINDOWNUMBER (7<<13)
222 /*** TX descriptor ***/
225 unsigned int DnNextPtr;
226 unsigned int FrameStartHeader;
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 int is3c556;
246 unsigned char isBrev;
247 unsigned char CurrentWindow;
249 unsigned char HWAddr[ETH_ALEN];
254 static struct nic nic;
256 #define _outl(v,a) outl((a),(v))
257 #define _outw(v,a) outw((a),(v))
258 #define _outb(v,a) outb((a),(v))
260 static int _issue_command(int ioaddr, int cmd, int param)
262 outw(ioaddr + regCommandIntStatus_w, (cmd << 11) | param);
264 while (inw(ioaddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
271 /*** a3c90x_internal_SetWindow: selects a register window set.
273 static int _set_window(int ioaddr, int window)
275 if (INF_3C90X.CurrentWindow == window)
278 _issue_command(ioaddr, cmdSelectRegisterWindow, window);
279 INF_3C90X.CurrentWindow = window;
285 /*** a3c90x_internal_ReadEeprom - read data from the serial eeprom.
287 static unsigned short
288 a3c90x_internal_ReadEeprom(int ioaddr, int address)
292 /** Select correct window **/
293 _set_window(INF_3C90X.IOAddr, winEepromBios0);
295 /** Make sure the eeprom isn't busy **/
299 for (i = 0; i < 165; i++)
300 inb(0x80); /* wait 165 usec */
302 while(0x8000 & inw(ioaddr + regEepromCommand_0_w));
304 /** Read the value. **/
305 if (INF_3C90X.is3c556)
306 _outw(address + (0x230), ioaddr + regEepromCommand_0_w);
308 _outw(address + 0x80, ioaddr + regEepromCommand_0_w);
313 for (i = 0; i < 165; i++)
314 inb(0x80); /* wait 165 usec */
316 while(0x8000 & inw(ioaddr + regEepromCommand_0_w));
317 val = inw(ioaddr + regEepromData_0_w);
323 #ifdef CFG_3C90X_BOOTROM_FIX
324 /*** a3c90x_internal_WriteEepromWord - write a physical word of
325 *** data to the onboard serial eeprom (not the BIOS prom, but the
326 *** nvram in the card that stores, among other things, the MAC
330 a3c90x_internal_WriteEepromWord(int ioaddr, int address, unsigned short value)
332 /** Select register window **/
333 _set_window(ioaddr, winEepromBios0);
335 /** Verify Eeprom not busy **/
336 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
338 /** Issue WriteEnable, and wait for completion. **/
339 _outw(0x30, ioaddr + regEepromCommand_0_w);
340 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
342 /** Issue EraseRegister, and wait for completion. **/
343 _outw(address + ((0x03)<<6), ioaddr + regEepromCommand_0_w);
344 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
346 /** Send the new data to the eeprom, and wait for completion. **/
347 _outw(value, ioaddr + regEepromData_0_w);
348 _outw(0x30, ioaddr + regEepromCommand_0_w);
349 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
351 /** Burn the new data into the eeprom, and wait for completion. **/
352 _outw(address + ((0x01)<<6), ioaddr + regEepromCommand_0_w);
353 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
359 #ifdef CFG_3C90X_BOOTROM_FIX
360 /*** a3c90x_internal_WriteEeprom - write data to the serial eeprom,
361 *** and re-compute the eeprom checksum.
364 a3c90x_internal_WriteEeprom(int ioaddr, int address, unsigned short value)
368 int maxAddress, cksumAddress;
370 if (INF_3C90X.isBrev)
381 /** Write the value. **/
382 if (a3c90x_internal_WriteEepromWord(ioaddr, address, value) == -1)
385 /** Recompute the checksum. **/
386 for(i=0;i<=maxAddress;i++)
388 v = a3c90x_internal_ReadEeprom(ioaddr, i);
390 cksum ^= ((v>>8) & 0xFF);
392 /** Write the checksum to the location in the eeprom **/
393 if (a3c90x_internal_WriteEepromWord(ioaddr, cksumAddress, cksum) == -1)
400 /*** a3c90x_reset: exported function that resets the card to its default
401 *** state. This is so the Linux driver can re-set the card up the way
402 *** it wants to. If CFG_3C90X_PRESERVE_XCVR is defined, then the reset will
403 *** not alter the selected transceiver that we used to download the boot
406 static void a3c90x_reset(void)
408 #ifdef CFG_3C90X_PRESERVE_XCVR
410 /** Read the current InternalConfig value. **/
411 _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
412 cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
415 /** Send the reset command to the card **/
416 outputf("3c90x: issuing RESET");
417 _issue_command(INF_3C90X.IOAddr, cmdGlobalReset, 0);
419 /** global reset command resets station mask, non-B revision cards
420 ** require explicit reset of values
422 _set_window(INF_3C90X.IOAddr, winAddressing2);
423 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+0);
424 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
425 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
427 #ifdef CFG_3C90X_PRESERVE_XCVR
428 /** Re-set the original InternalConfig value from before reset **/
429 _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
430 _outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
432 /** enable DC converter for 10-Base-T **/
433 if ((cfg&0x0300) == 0x0300)
435 _issue_command(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
439 /** Issue transmit reset, wait for command completion **/
440 _issue_command(INF_3C90X.IOAddr, cmdTxReset, 0);
441 if (! INF_3C90X.isBrev)
442 _outb(0x01, INF_3C90X.IOAddr + regTxFreeThresh_b);
443 _issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
446 ** reset of the receiver on B-revision cards re-negotiates the link
447 ** takes several seconds (a computer eternity)
449 if (INF_3C90X.isBrev)
450 _issue_command(INF_3C90X.IOAddr, cmdRxReset, 0x04);
452 _issue_command(INF_3C90X.IOAddr, cmdRxReset, 0x00);
453 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
455 _issue_command(INF_3C90X.IOAddr, cmdRxEnable, 0);
457 _issue_command(INF_3C90X.IOAddr, cmdSetInterruptEnable, 0);
458 /** enable rxComplete and txComplete **/
459 _issue_command(INF_3C90X.IOAddr, cmdSetIndicationEnable, 0x0014);
460 /** acknowledge any pending status flags **/
461 _issue_command(INF_3C90X.IOAddr, cmdAcknowledgeInterrupt, 0x661);
468 /*** a3c90x_transmit: exported function that transmits a packet. Does not
469 *** return any particular status. Parameters are:
470 *** dest_addr[6] - destination address, ethernet;
471 *** proto - protocol type (ARP, IP, etc);
472 *** size - size of the non-header part of the packet that needs transmitted;
473 *** pkt - the pointer to the packet data itself.
476 a3c90x_transmit(unsigned int size, const char *pkt)
478 unsigned char status;
479 unsigned int i, retries;
481 for (retries=0; retries < XMIT_RETRIES; retries++)
484 outputf("3c90x: retrying packet send (%d)", retries);
486 _issue_command(INF_3C90X.IOAddr, cmdStallCtl, 2 /* Stall download */);
488 /** Setup the DPD (download descriptor) **/
489 INF_3C90X.TransmitDPD.DnNextPtr = 0;
490 /** set notification for transmission completion (bit 15) **/
491 INF_3C90X.TransmitDPD.FrameStartHeader = (size) | 0x8000;
492 INF_3C90X.TransmitDPD.DataAddr = v2p((void*)pkt);
493 INF_3C90X.TransmitDPD.DataLength = size + (1<<31);
495 /** Send the packet **/
496 outl(INF_3C90X.IOAddr + regDnListPtr_l, v2p(&(INF_3C90X.TransmitDPD)));
497 _issue_command(INF_3C90X.IOAddr, cmdStallCtl, 3 /* Unstall download */);
499 oneshot_start_ms(100);
500 while((inl(INF_3C90X.IOAddr + regDnListPtr_l) != 0) && oneshot_running())
502 if (!oneshot_running())
503 outputf("3c90x: Download engine pointer timeout");
505 oneshot_start_ms(10); /* Give it 10 ms */
506 while (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_TXCOMPLETE) && oneshot_running())
509 if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_TXCOMPLETE))
511 outputf("3c90x: tx timeout? txstat %02x", inb(INF_3C90X.IOAddr + regTxStatus_b));
512 outputf("3c90x: Gen sts %04x", inw(INF_3C90X.IOAddr + regCommandIntStatus_w));
515 status = inb(INF_3C90X.IOAddr + regTxStatus_b);
516 outb(INF_3C90X.IOAddr + regTxStatus_b, 0x00);
518 /** successful completion (sans "interrupt Requested" bit) **/
519 if ((status & 0xbf) == 0x80)
522 outputf("3c90x: Status (%hhX)", status);
523 /** check error codes **/
526 outputf("3c90x: Tx Reclaim Error (%hhX)", status);
528 } else if (status & 0x04) {
529 outputf("3c90x: Tx Status Overflow (%hhX)", status);
531 _outb(0x00, INF_3C90X.IOAddr + regTxStatus_b);
532 /** must re-enable after max collisions before re-issuing tx **/
533 _issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
534 } else if (status & 0x08) {
535 outputf("3c90x: Tx Max Collisions (%hhX)", status);
536 /** must re-enable after max collisions before re-issuing tx **/
537 _issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
538 } else if (status & 0x10) {
539 outputf("3c90x: Tx Underrun (%hhX)", status);
541 } else if (status & 0x20) {
542 outputf("3c90x: Tx Jabber (%hhX)", status);
544 } else if ((status & 0x80) != 0x80) {
545 outputf("3c90x: Internal Error - Incomplete Transmission (%hhX)", status);
550 /** failed after RETRY attempts **/
551 outputf("3c90x: Failed to send after %d retries", retries);
557 /*** a3c90x_poll: exported routine that waits for a certain length of time
558 *** for a packet, and if it sees none, returns 0. This routine should
559 *** copy the packet to nic->packet if it gets a packet and set the size
560 *** in nic->packetlen. Return 1 if a packet was found.
563 a3c90x_poll(struct nic *nic, int retrieve)
567 if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0010))
572 if ( ! retrieve ) return 1;
574 /** we don't need to acknowledge rxComplete -- the upload engine
578 /** Build the up-load descriptor **/
579 INF_3C90X.ReceiveUPD.UpNextPtr = 0;
580 INF_3C90X.ReceiveUPD.UpPktStatus = 0;
581 INF_3C90X.ReceiveUPD.DataAddr = v2p(nic->packet);
582 INF_3C90X.ReceiveUPD.DataLength = 1536 + (1<<31);
584 /** Submit the upload descriptor to the NIC **/
585 _outl(v2p(&(INF_3C90X.ReceiveUPD)),
586 INF_3C90X.IOAddr + regUpListPtr_l);
588 /** Wait for upload completion (upComplete(15) or upError (14)) **/
589 for(i=0;i<40000;i++);
590 while((INF_3C90X.ReceiveUPD.UpPktStatus & ((1<<14) | (1<<15))) == 0)
591 for(i=0;i<40000;i++);
593 /** Check for Error (else we have good packet) **/
594 if (INF_3C90X.ReceiveUPD.UpPktStatus & (1<<14))
596 errcode = INF_3C90X.ReceiveUPD.UpPktStatus;
597 if (errcode & (1<<16))
598 outputf("3C90X: Rx Overrun (%hX)",errcode>>16);
599 else if (errcode & (1<<17))
600 outputf("3C90X: Runt Frame (%hX)",errcode>>16);
601 else if (errcode & (1<<18))
602 outputf("3C90X: Alignment Error (%hX)",errcode>>16);
603 else if (errcode & (1<<19))
604 outputf("3C90X: CRC Error (%hX)",errcode>>16);
605 else if (errcode & (1<<20))
606 outputf("3C90X: Oversized Frame (%hX)",errcode>>16);
608 outputf("3C90X: Packet error (%hX)",errcode>>16);
612 /** Ok, got packet. Set length in nic->packetlen. **/
613 nic->packetlen = (INF_3C90X.ReceiveUPD.UpPktStatus & 0x1FFF);
620 /*** a3c90x_disable: exported routine to disable the card. What's this for?
621 *** the eepro100.c driver didn't have one, so I just left this one empty too.
623 *** Must turn off receiver at least so stray packets will not corrupt memory
626 void a3c90x_disable(struct dev *dev)
628 /* reset and disable merge */
630 /* Disable the receiver and transmitter. */
631 _outw(cmdRxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w);
632 _outw(cmdTxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w);
636 /*** a3c90x_probe: exported routine to probe for the 3c905 card and perform
637 *** initialization. If this routine is called, the pci functions did find the
638 *** card. We just have to init it here.
640 static int a3c90x_probe(struct pci_dev * pci, void * data)
642 INF_3C90X.is3c556 = (pci->did == 0x6055);
645 unsigned short eeprom[0x100];
649 unsigned short linktype;
650 #define HWADDR_OFFSET 10
652 unsigned long ioaddr = 0;
653 for (i = 0; i < 6; i++) {
654 if (pci->bars[i].type == PCI_BAR_IO) {
655 ioaddr = pci->bars[i].addr;
662 outputf("3c90x: Unable to find I/O address");
667 pci_write16(pci->bus, pci->dev, pci->fn, 0xE0,
668 pci_read16(pci->bus, pci->dev, pci->fn, 0xE0) & ~0x3);
670 outputf("3c90x: Picked I/O address %04x", ioaddr);
672 nic.ioaddr = ioaddr & ~3;
675 INF_3C90X.IOAddr = ioaddr;
676 INF_3C90X.CurrentWindow = 255;
677 switch (a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, 0x03))
679 case 0x9000: /** 10 Base TPO **/
680 case 0x9001: /** 10/100 T4 **/
681 case 0x9050: /** 10/100 TPO **/
682 case 0x9051: /** 10 Base Combo **/
683 INF_3C90X.isBrev = 0;
686 case 0x9004: /** 10 Base TPO **/
687 case 0x9005: /** 10 Base Combo **/
688 case 0x9006: /** 10 Base TPO and Base2 **/
689 case 0x900A: /** 10 Base FL **/
690 case 0x9055: /** 10/100 TPO **/
691 case 0x9056: /** 10/100 T4 **/
692 case 0x905A: /** 10 Base FX **/
694 INF_3C90X.isBrev = 1;
698 /** Load the EEPROM contents **/
699 if (INF_3C90X.isBrev)
701 for(i=0;i<=/*0x20*/0x7F;i++)
703 eeprom[i] = a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, i);
706 #ifdef CFG_3C90X_BOOTROM_FIX
707 /** Set xcvrSelect in InternalConfig in eeprom. **/
708 /* only necessary for 3c905b revision cards with boot PROM bug!!! */
709 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x13, 0x0160);
712 #ifdef CFG_3C90X_XCVR
713 if (CFG_3C90X_XCVR == 255)
715 /** Clear the LanWorks register **/
716 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x16, 0);
720 /** Set the selected permanent-xcvrSelect in the
723 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x16,
724 XCVR_MAGIC + ((CFG_3C90X_XCVR) & 0x000F));
730 for(i=0;i<=/*0x17*/0x7F;i++)
732 eeprom[i] = a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, i);
736 /** Print identification message **/
737 #ifdef CFG_3C90X_BOOTROM_FIX
738 if (INF_3C90X.isBrev)
740 outputf("NOTE: 3c905b bootrom fix enabled; has side "
741 "effects. See 3c90x.txt for info.");
745 /** Retrieve the Hardware address and print it on the screen. **/
746 INF_3C90X.HWAddr[0] = eeprom[HWADDR_OFFSET + 0]>>8;
747 INF_3C90X.HWAddr[1] = eeprom[HWADDR_OFFSET + 0]&0xFF;
748 INF_3C90X.HWAddr[2] = eeprom[HWADDR_OFFSET + 1]>>8;
749 INF_3C90X.HWAddr[3] = eeprom[HWADDR_OFFSET + 1]&0xFF;
750 INF_3C90X.HWAddr[4] = eeprom[HWADDR_OFFSET + 2]>>8;
751 INF_3C90X.HWAddr[5] = eeprom[HWADDR_OFFSET + 2]&0xFF;
752 outputf("MAC Address = %02x:%02x:%02x:%02x:%02x:%02x",
758 INF_3C90X.HWAddr[5]);
760 /** 3C556: Invert MII power **/
761 if (INF_3C90X.is3c556) {
763 _set_window(INF_3C90X.IOAddr, winAddressing2);
764 tmp = inw(INF_3C90X.IOAddr + regResetOptions_2_w);
766 _outw(tmp, INF_3C90X.IOAddr + regResetOptions_2_w);
769 /* Test if the link is good, if not continue */
770 _set_window(INF_3C90X.IOAddr, winDiagnostics4);
771 mstat = inw(INF_3C90X.IOAddr + regMediaStatus_4_w);
772 if((mstat & (1<<11)) == 0) {
773 outputf("Valid link not established");
777 /** Program the MAC address into the station address registers **/
778 _set_window(INF_3C90X.IOAddr, winAddressing2);
779 _outw(htons(eeprom[HWADDR_OFFSET + 0]), INF_3C90X.IOAddr + regStationAddress_2_3w);
780 _outw(htons(eeprom[HWADDR_OFFSET + 1]), INF_3C90X.IOAddr + regStationAddress_2_3w+2);
781 _outw(htons(eeprom[HWADDR_OFFSET + 2]), INF_3C90X.IOAddr + regStationAddress_2_3w+4);
782 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+0);
783 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
784 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
786 /** Fill in our entry in the etherboot arp table **/
788 for(i=0;i<ETH_ALEN;i++)
789 nic.node_addr[i] = (eeprom[HWADDR_OFFSET + i/2] >> (8*((i&1)^1))) & 0xff;
792 /** Read the media options register, print a message and set default
795 ** Uses Media Option command on B revision, Reset Option on non-B
796 ** revision cards -- same register address
798 _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
799 mopt = inw(INF_3C90X.IOAddr + regResetMediaOptions_3_w);
801 /** mask out VCO bit that is defined as 10baseFL bit on B-rev cards **/
802 if (! INF_3C90X.isBrev)
807 outputf("Connectors present: ");
812 outputf("%s100Base-T4",(c++)?", ":"");
817 outputf("%s100Base-FX",(c++)?", ":"");
822 outputf("%s10Base-2",(c++)?", ":"");
827 outputf("%sAUI",(c++)?", ":"");
832 outputf("%sMII",(c++)?", ":"");
835 if ((mopt & 0xA) == 0xA)
837 outputf("%s10Base-T / 100Base-TX",(c++)?", ":"");
840 else if ((mopt & 0xA) == 0x2)
842 outputf("%s100Base-TX",(c++)?", ":"");
845 else if ((mopt & 0xA) == 0x8)
847 outputf("%s10Base-T",(c++)?", ":"");
852 /** Determine transceiver type to use, depending on value stored in
855 if (INF_3C90X.isBrev)
857 if ((eeprom[0x16] & 0xFF00) == XCVR_MAGIC)
860 linktype = eeprom[0x16] & 0x000F;
865 #ifdef CFG_3C90X_XCVR
866 if (CFG_3C90X_XCVR != 255)
867 linktype = CFG_3C90X_XCVR;
868 #endif /* CFG_3C90X_XCVR */
870 /** I don't know what MII MAC only mode is!!! **/
871 if (linktype == 0x0009)
873 if (INF_3C90X.isBrev)
874 outputf("WARNING: MII External MAC Mode only supported on B-revision "
875 "cards!!!!\nFalling Back to MII Mode\n");
880 /** enable DC converter for 10-Base-T **/
881 if (linktype == 0x0003)
883 _issue_command(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
886 /** Set the link to the type we just determined. **/
887 _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
888 cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
890 cfg |= (linktype<<20);
891 _outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
893 /** Now that we set the xcvr type, reset the Tx and Rx, re-enable. **/
894 _issue_command(INF_3C90X.IOAddr, cmdTxReset, 0);
895 if (!INF_3C90X.isBrev)
896 _outb(0x01, INF_3C90X.IOAddr + regTxFreeThresh_b);
898 _issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
901 ** reset of the receiver on B-revision cards re-negotiates the link
902 ** takes several seconds (a computer eternity)
904 if (INF_3C90X.isBrev)
905 _issue_command(INF_3C90X.IOAddr, cmdRxReset, 0x04);
907 _issue_command(INF_3C90X.IOAddr, cmdRxReset, 0x00);
909 /** Set the RX filter = receive only individual pkts & multicast & bcast. **/
910 _issue_command(INF_3C90X.IOAddr, cmdSetRxFilter, 0x01 + 0x02 + 0x04);
911 _issue_command(INF_3C90X.IOAddr, cmdRxEnable, 0);
915 ** set Indication and Interrupt flags , acknowledge any IRQ's
917 _issue_command(INF_3C90X.IOAddr, cmdSetInterruptEnable, 0);
918 _issue_command(INF_3C90X.IOAddr, cmdSetIndicationEnable, 0x0014);
919 _issue_command(INF_3C90X.IOAddr, cmdAcknowledgeInterrupt, 0x661);
921 /* * Set our exported functions **/
922 nic.poll = a3c90x_poll;
923 nic.transmit = a3c90x_transmit;
924 memcpy(nic.hwaddr, INF_3C90X.HWAddr, 6);
930 static struct pci_id a3c90x_nics[] = {
931 /* Original 90x revisions: */
932 PCI_ROM(0x10b7, 0x6055, "3c556", "3C556"), /* Huricane */
933 PCI_ROM(0x10b7, 0x9000, "3c905-tpo", "3Com900-TPO"), /* 10 Base TPO */
934 PCI_ROM(0x10b7, 0x9001, "3c905-t4", "3Com900-Combo"), /* 10/100 T4 */
935 PCI_ROM(0x10b7, 0x9050, "3c905-tpo100", "3Com905-TX"), /* 100 Base TX / 10/100 TPO */
936 PCI_ROM(0x10b7, 0x9051, "3c905-combo", "3Com905-T4"), /* 100 Base T4 / 10 Base Combo */
937 /* Newer 90xB revisions: */
938 PCI_ROM(0x10b7, 0x9004, "3c905b-tpo", "3Com900B-TPO"), /* 10 Base TPO */
939 PCI_ROM(0x10b7, 0x9005, "3c905b-combo", "3Com900B-Combo"), /* 10 Base Combo */
940 PCI_ROM(0x10b7, 0x9006, "3c905b-tpb2", "3Com900B-2/T"), /* 10 Base TP and Base2 */
941 PCI_ROM(0x10b7, 0x900a, "3c905b-fl", "3Com900B-FL"), /* 10 Base FL */
942 PCI_ROM(0x10b7, 0x9055, "3c905b-tpo100", "3Com905B-TX"), /* 10/100 TPO */
943 PCI_ROM(0x10b7, 0x9056, "3c905b-t4", "3Com905B-T4"), /* 10/100 T4 */
944 PCI_ROM(0x10b7, 0x9058, "3c905b-9058", "3Com905B-9058"), /* Cyclone 10/100/BNC */
945 PCI_ROM(0x10b7, 0x905a, "3c905b-fx", "3Com905B-FL"), /* 100 Base FX / 10 Base FX */
946 /* Newer 90xC revision: */
947 PCI_ROM(0x10b7, 0x9200, "3c905c-tpo", "3Com905C-TXM"), /* 10/100 TPO (3C905C-TXM) */
948 PCI_ROM(0x10b7, 0x9202, "3c920b-emb-ati", "3c920B-EMB-WNM (ATI Radeon 9100 IGP)"), /* 3c920B-EMB-WNM (ATI Radeon 9100 IGP) */
949 PCI_ROM(0x10b7, 0x9210, "3c920b-emb-wnm","3Com20B-EMB WNM"),
950 PCI_ROM(0x10b7, 0x9800, "3c980", "3Com980-Cyclone"), /* Cyclone */
951 PCI_ROM(0x10b7, 0x9805, "3c9805", "3Com9805"), /* Dual Port Server Cyclone */
952 PCI_ROM(0x10b7, 0x7646, "3csoho100-tx", "3CSOHO100-TX"), /* Hurricane */
953 PCI_ROM(0x10b7, 0x4500, "3c450", "3Com450 HomePNA Tornado"),
954 PCI_ROM(0x10b7, 0x1201, "3c982a", "3Com982A"),
955 PCI_ROM(0x10b7, 0x1202, "3c982b", "3Com982B"),
958 struct pci_driver a3c90x_driver = {
960 .probe = a3c90x_probe,
962 .id_count = sizeof(a3c90x_nics)/sizeof(a3c90x_nics[0]),