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 HdrAddr;
228 unsigned int HdrLength;
229 unsigned int DataAddr;
230 unsigned int DataLength;
232 TXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
234 /*** RX descriptor ***/
237 unsigned int UpNextPtr;
238 unsigned int UpPktStatus;
239 unsigned int DataAddr;
240 unsigned int DataLength;
242 RXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
244 /*** Global variables ***/
247 unsigned int is3c556;
248 unsigned char isBrev;
249 unsigned char CurrentWindow;
251 unsigned char HWAddr[ETH_ALEN];
256 static struct nic nic;
258 #define _outl(v,a) outl((a),(v))
259 #define _outw(v,a) outw((a),(v))
260 #define _outb(v,a) outb((a),(v))
262 static int _issue_command(int ioaddr, int cmd, int param)
264 outw(ioaddr + regCommandIntStatus_w, (cmd << 11) | param);
266 while (inw(ioaddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
273 /*** a3c90x_internal_SetWindow: selects a register window set.
275 static int _set_window(int ioaddr, int window)
277 if (INF_3C90X.CurrentWindow == window)
280 _issue_command(ioaddr, cmdSelectRegisterWindow, window);
281 INF_3C90X.CurrentWindow = window;
287 /*** a3c90x_internal_ReadEeprom - read data from the serial eeprom.
289 static unsigned short
290 a3c90x_internal_ReadEeprom(int ioaddr, int address)
294 /** Select correct window **/
295 _set_window(INF_3C90X.IOAddr, winEepromBios0);
297 /** Make sure the eeprom isn't busy **/
301 for (i = 0; i < 165; i++)
302 inb(0x80); /* wait 165 usec */
304 while(0x8000 & inw(ioaddr + regEepromCommand_0_w));
306 /** Read the value. **/
307 if (INF_3C90X.is3c556)
308 _outw(address + (0x230), ioaddr + regEepromCommand_0_w);
310 _outw(address + 0x80, ioaddr + regEepromCommand_0_w);
315 for (i = 0; i < 165; i++)
316 inb(0x80); /* wait 165 usec */
318 while(0x8000 & inw(ioaddr + regEepromCommand_0_w));
319 val = inw(ioaddr + regEepromData_0_w);
325 #ifdef CFG_3C90X_BOOTROM_FIX
326 /*** a3c90x_internal_WriteEepromWord - write a physical word of
327 *** data to the onboard serial eeprom (not the BIOS prom, but the
328 *** nvram in the card that stores, among other things, the MAC
332 a3c90x_internal_WriteEepromWord(int ioaddr, int address, unsigned short value)
334 /** Select register window **/
335 _set_window(ioaddr, winEepromBios0);
337 /** Verify Eeprom not busy **/
338 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
340 /** Issue WriteEnable, and wait for completion. **/
341 _outw(0x30, ioaddr + regEepromCommand_0_w);
342 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
344 /** Issue EraseRegister, and wait for completion. **/
345 _outw(address + ((0x03)<<6), ioaddr + regEepromCommand_0_w);
346 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
348 /** Send the new data to the eeprom, and wait for completion. **/
349 _outw(value, ioaddr + regEepromData_0_w);
350 _outw(0x30, ioaddr + regEepromCommand_0_w);
351 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
353 /** Burn the new data into the eeprom, and wait for completion. **/
354 _outw(address + ((0x01)<<6), ioaddr + regEepromCommand_0_w);
355 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
361 #ifdef CFG_3C90X_BOOTROM_FIX
362 /*** a3c90x_internal_WriteEeprom - write data to the serial eeprom,
363 *** and re-compute the eeprom checksum.
366 a3c90x_internal_WriteEeprom(int ioaddr, int address, unsigned short value)
370 int maxAddress, cksumAddress;
372 if (INF_3C90X.isBrev)
383 /** Write the value. **/
384 if (a3c90x_internal_WriteEepromWord(ioaddr, address, value) == -1)
387 /** Recompute the checksum. **/
388 for(i=0;i<=maxAddress;i++)
390 v = a3c90x_internal_ReadEeprom(ioaddr, i);
392 cksum ^= ((v>>8) & 0xFF);
394 /** Write the checksum to the location in the eeprom **/
395 if (a3c90x_internal_WriteEepromWord(ioaddr, cksumAddress, cksum) == -1)
402 /*** a3c90x_reset: exported function that resets the card to its default
403 *** state. This is so the Linux driver can re-set the card up the way
404 *** it wants to. If CFG_3C90X_PRESERVE_XCVR is defined, then the reset will
405 *** not alter the selected transceiver that we used to download the boot
408 static void a3c90x_reset(void)
410 #ifdef CFG_3C90X_PRESERVE_XCVR
412 /** Read the current InternalConfig value. **/
413 _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
414 cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
417 /** Send the reset command to the card **/
418 outputf("3c90x: issuing RESET");
419 _issue_command(INF_3C90X.IOAddr, cmdGlobalReset, 0);
421 /** global reset command resets station mask, non-B revision cards
422 ** require explicit reset of values
424 _set_window(INF_3C90X.IOAddr, winAddressing2);
425 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+0);
426 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
427 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
429 #ifdef CFG_3C90X_PRESERVE_XCVR
430 /** Re-set the original InternalConfig value from before reset **/
431 _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
432 _outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
434 /** enable DC converter for 10-Base-T **/
435 if ((cfg&0x0300) == 0x0300)
437 _issue_command(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
441 /** Issue transmit reset, wait for command completion **/
442 _issue_command(INF_3C90X.IOAddr, cmdTxReset, 0);
443 if (! INF_3C90X.isBrev)
444 _outb(0x01, INF_3C90X.IOAddr + regTxFreeThresh_b);
445 _issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
448 ** reset of the receiver on B-revision cards re-negotiates the link
449 ** takes several seconds (a computer eternity)
451 if (INF_3C90X.isBrev)
452 _issue_command(INF_3C90X.IOAddr, cmdRxReset, 0x04);
454 _issue_command(INF_3C90X.IOAddr, cmdRxReset, 0x00);
455 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
457 _issue_command(INF_3C90X.IOAddr, cmdRxEnable, 0);
459 _issue_command(INF_3C90X.IOAddr, cmdSetInterruptEnable, 0);
460 /** enable rxComplete and txComplete **/
461 _issue_command(INF_3C90X.IOAddr, cmdSetIndicationEnable, 0x0014);
462 /** acknowledge any pending status flags **/
463 _issue_command(INF_3C90X.IOAddr, cmdAcknowledgeInterrupt, 0x661);
470 /*** a3c90x_transmit: exported function that transmits a packet. Does not
471 *** return any particular status. Parameters are:
472 *** dest_addr[6] - destination address, ethernet;
473 *** proto - protocol type (ARP, IP, etc);
474 *** size - size of the non-header part of the packet that needs transmitted;
475 *** pkt - the pointer to the packet data itself.
478 a3c90x_transmit(const char *dest_addr, unsigned int proto,
479 unsigned int size, const char *pkt)
483 unsigned char dst_addr[ETH_ALEN];
484 unsigned char src_addr[ETH_ALEN];
488 unsigned char status;
489 unsigned int i, retries;
491 for (retries=0; retries < XMIT_RETRIES; retries++)
494 outputf("3c90x: retrying packet send (%d)", retries);
496 _issue_command(INF_3C90X.IOAddr, cmdStallCtl, 2 /* Stall download */);
498 hdr.type = htons(proto);
499 memcpy(hdr.dst_addr, dest_addr, ETH_ALEN);
500 memcpy(hdr.src_addr, INF_3C90X.HWAddr, ETH_ALEN);
502 /** Setup the DPD (download descriptor) **/
503 INF_3C90X.TransmitDPD.DnNextPtr = 0;
504 /** set notification for transmission completion (bit 15) **/
505 INF_3C90X.TransmitDPD.FrameStartHeader = (size + sizeof(hdr)) | 0x8000;
506 INF_3C90X.TransmitDPD.HdrAddr = virt_to_bus(&hdr);
507 INF_3C90X.TransmitDPD.HdrLength = sizeof(hdr);
508 INF_3C90X.TransmitDPD.DataAddr = virt_to_bus(pkt);
509 INF_3C90X.TransmitDPD.DataLength = size + (1<<31);
511 /** Send the packet **/
512 outl(INF_3C90X.IOAddr + regDnListPtr_l, virt_to_bus(&(INF_3C90X.TransmitDPD)));
513 _issue_command(INF_3C90X.IOAddr, cmdStallCtl, 3 /* Unstall download */);
515 oneshot_start_ms(100);
516 while((inl(INF_3C90X.IOAddr + regDnListPtr_l) != 0) && oneshot_running())
518 if (!oneshot_running())
519 outputf("3c90x: Download engine pointer timeout");
521 oneshot_start_ms(10); /* Give it 10 ms */
522 while (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_TXCOMPLETE) && oneshot_running())
525 if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_TXCOMPLETE))
527 outputf("3c90x: tx timeout? txstat %02x", inb(INF_3C90X.IOAddr + regTxStatus_b));
528 outputf("3c90x: Gen sts %04x", inw(INF_3C90X.IOAddr + regCommandIntStatus_w));
531 status = inb(INF_3C90X.IOAddr + regTxStatus_b);
532 outb(INF_3C90X.IOAddr + regTxStatus_b, 0x00);
534 /** successful completion (sans "interrupt Requested" bit) **/
535 if ((status & 0xbf) == 0x80)
538 outputf("3c90x: Status (%hhX)", status);
539 /** check error codes **/
542 outputf("3c90x: Tx Reclaim Error (%hhX)", status);
544 } else if (status & 0x04) {
545 outputf("3c90x: Tx Status Overflow (%hhX)", status);
547 _outb(0x00, INF_3C90X.IOAddr + regTxStatus_b);
548 /** must re-enable after max collisions before re-issuing tx **/
549 _issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
550 } else if (status & 0x08) {
551 outputf("3c90x: Tx Max Collisions (%hhX)", status);
552 /** must re-enable after max collisions before re-issuing tx **/
553 _issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
554 } else if (status & 0x10) {
555 outputf("3c90x: Tx Underrun (%hhX)", status);
557 } else if (status & 0x20) {
558 outputf("3c90x: Tx Jabber (%hhX)", status);
560 } else if ((status & 0x80) != 0x80) {
561 outputf("3c90x: Internal Error - Incomplete Transmission (%hhX)", status);
566 /** failed after RETRY attempts **/
567 outputf("3c90x: Failed to send after %d retries", retries);
573 /*** a3c90x_poll: exported routine that waits for a certain length of time
574 *** for a packet, and if it sees none, returns 0. This routine should
575 *** copy the packet to nic->packet if it gets a packet and set the size
576 *** in nic->packetlen. Return 1 if a packet was found.
579 a3c90x_poll(struct nic *nic, int retrieve)
583 if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0010))
588 if ( ! retrieve ) return 1;
590 /** we don't need to acknowledge rxComplete -- the upload engine
594 /** Build the up-load descriptor **/
595 INF_3C90X.ReceiveUPD.UpNextPtr = 0;
596 INF_3C90X.ReceiveUPD.UpPktStatus = 0;
597 INF_3C90X.ReceiveUPD.DataAddr = virt_to_bus(nic->packet);
598 INF_3C90X.ReceiveUPD.DataLength = 1536 + (1<<31);
600 /** Submit the upload descriptor to the NIC **/
601 _outl(virt_to_bus(&(INF_3C90X.ReceiveUPD)),
602 INF_3C90X.IOAddr + regUpListPtr_l);
604 /** Wait for upload completion (upComplete(15) or upError (14)) **/
605 for(i=0;i<40000;i++);
606 while((INF_3C90X.ReceiveUPD.UpPktStatus & ((1<<14) | (1<<15))) == 0)
607 for(i=0;i<40000;i++);
609 /** Check for Error (else we have good packet) **/
610 if (INF_3C90X.ReceiveUPD.UpPktStatus & (1<<14))
612 errcode = INF_3C90X.ReceiveUPD.UpPktStatus;
613 if (errcode & (1<<16))
614 outputf("3C90X: Rx Overrun (%hX)",errcode>>16);
615 else if (errcode & (1<<17))
616 outputf("3C90X: Runt Frame (%hX)",errcode>>16);
617 else if (errcode & (1<<18))
618 outputf("3C90X: Alignment Error (%hX)",errcode>>16);
619 else if (errcode & (1<<19))
620 outputf("3C90X: CRC Error (%hX)",errcode>>16);
621 else if (errcode & (1<<20))
622 outputf("3C90X: Oversized Frame (%hX)",errcode>>16);
624 outputf("3C90X: Packet error (%hX)",errcode>>16);
628 /** Ok, got packet. Set length in nic->packetlen. **/
629 nic->packetlen = (INF_3C90X.ReceiveUPD.UpPktStatus & 0x1FFF);
636 /*** a3c90x_disable: exported routine to disable the card. What's this for?
637 *** the eepro100.c driver didn't have one, so I just left this one empty too.
639 *** Must turn off receiver at least so stray packets will not corrupt memory
642 void a3c90x_disable(struct dev *dev)
644 /* reset and disable merge */
646 /* Disable the receiver and transmitter. */
647 _outw(cmdRxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w);
648 _outw(cmdTxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w);
652 /*** a3c90x_probe: exported routine to probe for the 3c905 card and perform
653 *** initialization. If this routine is called, the pci functions did find the
654 *** card. We just have to init it here.
656 static int a3c90x_probe(struct pci_dev * pci, void * data)
658 INF_3C90X.is3c556 = (pci->did == 0x6055);
661 unsigned short eeprom[0x100];
665 unsigned short linktype;
666 #define HWADDR_OFFSET 10
668 unsigned long ioaddr = 0;
669 for (i = 0; i < 6; i++) {
670 if (pci->bars[i].type == PCI_BAR_IO) {
671 ioaddr = pci->bars[i].addr;
678 outputf("3c90x: Unable to find I/O address");
683 pci_write16(pci->bus, pci->dev, pci->fn, 0xE0,
684 pci_read16(pci->bus, pci->dev, pci->fn, 0xE0) & ~0x3);
686 outputf("3c90x: Picked I/O address %04x", ioaddr);
688 nic.ioaddr = ioaddr & ~3;
691 INF_3C90X.IOAddr = ioaddr;
692 INF_3C90X.CurrentWindow = 255;
693 switch (a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, 0x03))
695 case 0x9000: /** 10 Base TPO **/
696 case 0x9001: /** 10/100 T4 **/
697 case 0x9050: /** 10/100 TPO **/
698 case 0x9051: /** 10 Base Combo **/
699 INF_3C90X.isBrev = 0;
702 case 0x9004: /** 10 Base TPO **/
703 case 0x9005: /** 10 Base Combo **/
704 case 0x9006: /** 10 Base TPO and Base2 **/
705 case 0x900A: /** 10 Base FL **/
706 case 0x9055: /** 10/100 TPO **/
707 case 0x9056: /** 10/100 T4 **/
708 case 0x905A: /** 10 Base FX **/
710 INF_3C90X.isBrev = 1;
714 /** Load the EEPROM contents **/
715 if (INF_3C90X.isBrev)
717 for(i=0;i<=/*0x20*/0x7F;i++)
719 eeprom[i] = a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, i);
722 #ifdef CFG_3C90X_BOOTROM_FIX
723 /** Set xcvrSelect in InternalConfig in eeprom. **/
724 /* only necessary for 3c905b revision cards with boot PROM bug!!! */
725 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x13, 0x0160);
728 #ifdef CFG_3C90X_XCVR
729 if (CFG_3C90X_XCVR == 255)
731 /** Clear the LanWorks register **/
732 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x16, 0);
736 /** Set the selected permanent-xcvrSelect in the
739 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x16,
740 XCVR_MAGIC + ((CFG_3C90X_XCVR) & 0x000F));
746 for(i=0;i<=/*0x17*/0x7F;i++)
748 eeprom[i] = a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, i);
752 /** Print identification message **/
753 #ifdef CFG_3C90X_BOOTROM_FIX
754 if (INF_3C90X.isBrev)
756 outputf("NOTE: 3c905b bootrom fix enabled; has side "
757 "effects. See 3c90x.txt for info.");
761 /** Retrieve the Hardware address and print it on the screen. **/
762 INF_3C90X.HWAddr[0] = eeprom[HWADDR_OFFSET + 0]>>8;
763 INF_3C90X.HWAddr[1] = eeprom[HWADDR_OFFSET + 0]&0xFF;
764 INF_3C90X.HWAddr[2] = eeprom[HWADDR_OFFSET + 1]>>8;
765 INF_3C90X.HWAddr[3] = eeprom[HWADDR_OFFSET + 1]&0xFF;
766 INF_3C90X.HWAddr[4] = eeprom[HWADDR_OFFSET + 2]>>8;
767 INF_3C90X.HWAddr[5] = eeprom[HWADDR_OFFSET + 2]&0xFF;
768 outputf("MAC Address = %02x:%02x:%02x:%02x:%02x:%02x",
774 INF_3C90X.HWAddr[5]);
776 /** 3C556: Invert MII power **/
777 if (INF_3C90X.is3c556) {
779 _set_window(INF_3C90X.IOAddr, winAddressing2);
780 tmp = inw(INF_3C90X.IOAddr + regResetOptions_2_w);
782 _outw(tmp, INF_3C90X.IOAddr + regResetOptions_2_w);
785 /* Test if the link is good, if not continue */
786 _set_window(INF_3C90X.IOAddr, winDiagnostics4);
787 mstat = inw(INF_3C90X.IOAddr + regMediaStatus_4_w);
788 if((mstat & (1<<11)) == 0) {
789 outputf("Valid link not established");
793 /** Program the MAC address into the station address registers **/
794 _set_window(INF_3C90X.IOAddr, winAddressing2);
795 _outw(htons(eeprom[HWADDR_OFFSET + 0]), INF_3C90X.IOAddr + regStationAddress_2_3w);
796 _outw(htons(eeprom[HWADDR_OFFSET + 1]), INF_3C90X.IOAddr + regStationAddress_2_3w+2);
797 _outw(htons(eeprom[HWADDR_OFFSET + 2]), INF_3C90X.IOAddr + regStationAddress_2_3w+4);
798 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+0);
799 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
800 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
802 /** Fill in our entry in the etherboot arp table **/
804 for(i=0;i<ETH_ALEN;i++)
805 nic.node_addr[i] = (eeprom[HWADDR_OFFSET + i/2] >> (8*((i&1)^1))) & 0xff;
808 /** Read the media options register, print a message and set default
811 ** Uses Media Option command on B revision, Reset Option on non-B
812 ** revision cards -- same register address
814 _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
815 mopt = inw(INF_3C90X.IOAddr + regResetMediaOptions_3_w);
817 /** mask out VCO bit that is defined as 10baseFL bit on B-rev cards **/
818 if (! INF_3C90X.isBrev)
823 outputf("Connectors present: ");
828 outputf("%s100Base-T4",(c++)?", ":"");
833 outputf("%s100Base-FX",(c++)?", ":"");
838 outputf("%s10Base-2",(c++)?", ":"");
843 outputf("%sAUI",(c++)?", ":"");
848 outputf("%sMII",(c++)?", ":"");
851 if ((mopt & 0xA) == 0xA)
853 outputf("%s10Base-T / 100Base-TX",(c++)?", ":"");
856 else if ((mopt & 0xA) == 0x2)
858 outputf("%s100Base-TX",(c++)?", ":"");
861 else if ((mopt & 0xA) == 0x8)
863 outputf("%s10Base-T",(c++)?", ":"");
868 /** Determine transceiver type to use, depending on value stored in
871 if (INF_3C90X.isBrev)
873 if ((eeprom[0x16] & 0xFF00) == XCVR_MAGIC)
876 linktype = eeprom[0x16] & 0x000F;
881 #ifdef CFG_3C90X_XCVR
882 if (CFG_3C90X_XCVR != 255)
883 linktype = CFG_3C90X_XCVR;
884 #endif /* CFG_3C90X_XCVR */
886 /** I don't know what MII MAC only mode is!!! **/
887 if (linktype == 0x0009)
889 if (INF_3C90X.isBrev)
890 outputf("WARNING: MII External MAC Mode only supported on B-revision "
891 "cards!!!!\nFalling Back to MII Mode\n");
896 /** enable DC converter for 10-Base-T **/
897 if (linktype == 0x0003)
899 _issue_command(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
902 /** Set the link to the type we just determined. **/
903 _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
904 cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
906 cfg |= (linktype<<20);
907 _outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
909 /** Now that we set the xcvr type, reset the Tx and Rx, re-enable. **/
910 _issue_command(INF_3C90X.IOAddr, cmdTxReset, 0);
911 if (!INF_3C90X.isBrev)
912 _outb(0x01, INF_3C90X.IOAddr + regTxFreeThresh_b);
914 _issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
917 ** reset of the receiver on B-revision cards re-negotiates the link
918 ** takes several seconds (a computer eternity)
920 if (INF_3C90X.isBrev)
921 _issue_command(INF_3C90X.IOAddr, cmdRxReset, 0x04);
923 _issue_command(INF_3C90X.IOAddr, cmdRxReset, 0x00);
925 /** Set the RX filter = receive only individual pkts & multicast & bcast. **/
926 _issue_command(INF_3C90X.IOAddr, cmdSetRxFilter, 0x01 + 0x02 + 0x04);
927 _issue_command(INF_3C90X.IOAddr, cmdRxEnable, 0);
931 ** set Indication and Interrupt flags , acknowledge any IRQ's
933 _issue_command(INF_3C90X.IOAddr, cmdSetInterruptEnable, 0);
934 _issue_command(INF_3C90X.IOAddr, cmdSetIndicationEnable, 0x0014);
935 _issue_command(INF_3C90X.IOAddr, cmdAcknowledgeInterrupt, 0x661);
937 /* * Set our exported functions **/
938 nic.poll = a3c90x_poll;
939 nic.transmit = a3c90x_transmit;
945 static struct pci_id a3c90x_nics[] = {
946 /* Original 90x revisions: */
947 PCI_ROM(0x10b7, 0x6055, "3c556", "3C556"), /* Huricane */
948 PCI_ROM(0x10b7, 0x9000, "3c905-tpo", "3Com900-TPO"), /* 10 Base TPO */
949 PCI_ROM(0x10b7, 0x9001, "3c905-t4", "3Com900-Combo"), /* 10/100 T4 */
950 PCI_ROM(0x10b7, 0x9050, "3c905-tpo100", "3Com905-TX"), /* 100 Base TX / 10/100 TPO */
951 PCI_ROM(0x10b7, 0x9051, "3c905-combo", "3Com905-T4"), /* 100 Base T4 / 10 Base Combo */
952 /* Newer 90xB revisions: */
953 PCI_ROM(0x10b7, 0x9004, "3c905b-tpo", "3Com900B-TPO"), /* 10 Base TPO */
954 PCI_ROM(0x10b7, 0x9005, "3c905b-combo", "3Com900B-Combo"), /* 10 Base Combo */
955 PCI_ROM(0x10b7, 0x9006, "3c905b-tpb2", "3Com900B-2/T"), /* 10 Base TP and Base2 */
956 PCI_ROM(0x10b7, 0x900a, "3c905b-fl", "3Com900B-FL"), /* 10 Base FL */
957 PCI_ROM(0x10b7, 0x9055, "3c905b-tpo100", "3Com905B-TX"), /* 10/100 TPO */
958 PCI_ROM(0x10b7, 0x9056, "3c905b-t4", "3Com905B-T4"), /* 10/100 T4 */
959 PCI_ROM(0x10b7, 0x9058, "3c905b-9058", "3Com905B-9058"), /* Cyclone 10/100/BNC */
960 PCI_ROM(0x10b7, 0x905a, "3c905b-fx", "3Com905B-FL"), /* 100 Base FX / 10 Base FX */
961 /* Newer 90xC revision: */
962 PCI_ROM(0x10b7, 0x9200, "3c905c-tpo", "3Com905C-TXM"), /* 10/100 TPO (3C905C-TXM) */
963 PCI_ROM(0x10b7, 0x9202, "3c920b-emb-ati", "3c920B-EMB-WNM (ATI Radeon 9100 IGP)"), /* 3c920B-EMB-WNM (ATI Radeon 9100 IGP) */
964 PCI_ROM(0x10b7, 0x9210, "3c920b-emb-wnm","3Com20B-EMB WNM"),
965 PCI_ROM(0x10b7, 0x9800, "3c980", "3Com980-Cyclone"), /* Cyclone */
966 PCI_ROM(0x10b7, 0x9805, "3c9805", "3Com9805"), /* Dual Port Server Cyclone */
967 PCI_ROM(0x10b7, 0x7646, "3csoho100-tx", "3CSOHO100-TX"), /* Hurricane */
968 PCI_ROM(0x10b7, 0x4500, "3c450", "3Com450 HomePNA Tornado"),
969 PCI_ROM(0x10b7, 0x1201, "3c982a", "3Com982A"),
970 PCI_ROM(0x10b7, 0x1202, "3c982b", "3Com982B"),
973 struct pci_driver a3c90x_driver = {
975 .probe = a3c90x_probe,
977 .id_count = sizeof(a3c90x_nics)/sizeof(a3c90x_nics[0]),