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Allow NIC poll routine to do packet chain handling on our behalf.
[netwatch.git] / net / 3c90x.c
CommitLineData
748534f4
JP		 1/*
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).
5 *
6 * This program Copyright (C) 1999 LightSys Technology Services, Inc.
7 * Portions Copyright (C) 1999 Steve Smith
8 *
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.
17 *
18 * --------
19 *
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.
24 *
25 * REVISION HISTORY:
26 *
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
36 * not 8-byte aligned.
37 *
38 */
39
40#include "etherboot-compat.h"
42125f27 41#include "net.h"
748534f4
JP		 42#include <timer.h>
43#include <io.h>
44#include <pci.h>
7a914840 45#include <pci-bother.h>
748534f4
JP		 46#include <minilib.h>
47#include <output.h>
68beefa8 48#include <paging.h>
748534f4
JP		 49
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
53 ** be plenty
54 **/
c25f3f39 55#define XMIT_RETRIES 5
748534f4
JP		 56
57/*** Register definitions for the 3c905 ***/
58enum Registers
59 {
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 **/
79 /** **/
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) **/
85 };
86
87/** following are windowed registers **/
88enum Registers7
89 {
90 regPowerMgmtEvent_7_w = 0x0c, /** 905B Revision Only **/
91 regVlanEtherType_7_w = 0x04, /** 905B Revision Only **/
92 regVlanMask_7_w = 0x00, /** 905B Revision Only **/
93 };
94
95enum Registers6
96 {
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 **/
109 };
110
111enum Registers5
112 {
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 **/
119 };
120
121enum Registers4
122 {
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? **/
130 };
131
132enum Registers3
133 {
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 **/
142 };
143
144enum Registers2
145 {
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 **/
149 };
150
151enum Registers1
152 {
153 regRxStatus_1_w = 0x0a, /** 90X Revision Only, Pg 126 **/
154 };
155
156enum Registers0
157 {
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 **/
162 };
163
164
165/*** The names for the eight register windows ***/
166enum Windows
167 {
168 winPowerVlan7 = 0x07,
169 winStatistics6 = 0x06,
170 winTxRxControl5 = 0x05,
171 winDiagnostics4 = 0x04,
172 winTxRxOptions3 = 0x03,
173 winAddressing2 = 0x02,
174 winUnused1 = 0x01,
175 winEepromBios0 = 0x00,
176 };
177
178
179/*** Command definitions for the 3c90X ***/
180enum Commands
181 {
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, /** **/
204 };
205
206
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)
220
9c86d6da
JW		 221/* These structures are all 64-bit aligned, as needed for bus-mastering I/O. */
222typedef struct {
223 unsigned int addr;
224 unsigned int len;
225} segment_t __attribute__ ((aligned(8)));
226
227typedef struct {
228 unsigned int next;
229 unsigned int hdr;
230 segment_t segments[64 /* XXX magic */];
231} txdesc_t __attribute__ ((aligned(8)));
748534f4
JP		 232
233/*** RX descriptor ***/
9c86d6da
JW		 234typedef struct {
235 unsigned int next;
236 unsigned int status;
237 segment_t segments[64];
238} rxdesc_t __attribute__ ((aligned(8)));
748534f4
JP		 239
240/*** Global variables ***/
241static struct
242 {
243 unsigned int is3c556;
244 unsigned char isBrev;
245 unsigned char CurrentWindow;
246 unsigned int IOAddr;
247 unsigned char HWAddr[ETH_ALEN];
748534f4
JP		 248 }
249 INF_3C90X;
9c86d6da 250
7a914840 251static struct nic nic;
9c86d6da
JW		 252static txdesc_t txdesc;
253static rxdesc_t rxdesc;
254
748534f4 255
c2e34447
JW		 256#define _outl(v,a) outl((a),(v))
257#define _outw(v,a) outw((a),(v))
258#define _outb(v,a) outb((a),(v))
748534f4 259
31ddf9b3
JW		 260static int _issue_command(int ioaddr, int cmd, int param)
261{
262 outw(ioaddr + regCommandIntStatus_w, (cmd << 11) | param);
748534f4 263
31ddf9b3
JW		 264 while (inw(ioaddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
265 ;
748534f4 266
31ddf9b3
JW		 267 return 0;
268}
748534f4
JP		 269
270
271/*** a3c90x_internal_SetWindow: selects a register window set.
272 ***/
31ddf9b3
JW		 273static int _set_window(int ioaddr, int window)
274{
275 if (INF_3C90X.CurrentWindow == window)
276 return 0;
748534f4 277
31ddf9b3 278 _issue_command(ioaddr, cmdSelectRegisterWindow, window);
748534f4
JP		 279 INF_3C90X.CurrentWindow = window;
280
31ddf9b3
JW		 281 return 0;
282}
748534f4
JP		 283
284
285/*** a3c90x_internal_ReadEeprom - read data from the serial eeprom.
286 ***/
287static unsigned short
288a3c90x_internal_ReadEeprom(int ioaddr, int address)
c2e34447
JW		 289{
290 unsigned short val;
748534f4
JP		 291
292 /** Select correct window **/
31ddf9b3 293 _set_window(INF_3C90X.IOAddr, winEepromBios0);
748534f4
JP		 294
295 /** Make sure the eeprom isn't busy **/
c2e34447
JW		 296 do
297 {
298 int i;
299 for (i = 0; i < 165; i++)
300 inb(0x80); /* wait 165 usec */
301 }
302 while(0x8000 & inw(ioaddr + regEepromCommand_0_w));
748534f4
JP		 303
304 /** Read the value. **/
305 if (INF_3C90X.is3c556)
c2e34447 306 _outw(address + (0x230), ioaddr + regEepromCommand_0_w);
748534f4 307 else
c2e34447 308 _outw(address + 0x80, ioaddr + regEepromCommand_0_w);
748534f4 309
c2e34447
JW		 310 do
311 {
312 int i;
313 for (i = 0; i < 165; i++)
314 inb(0x80); /* wait 165 usec */
315 }
316 while(0x8000 & inw(ioaddr + regEepromCommand_0_w));
317 val = inw(ioaddr + regEepromData_0_w);
318
319 return val;
320}
748534f4
JP		 321
322
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
327 *** address).
328 ***/
329static int
330a3c90x_internal_WriteEepromWord(int ioaddr, int address, unsigned short value)
331 {
332 /** Select register window **/
31ddf9b3 333 _set_window(ioaddr, winEepromBios0);
748534f4
JP		 334
335 /** Verify Eeprom not busy **/
336 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
337
338 /** Issue WriteEnable, and wait for completion. **/
c2e34447 339 _outw(0x30, ioaddr + regEepromCommand_0_w);
748534f4
JP		 340 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
341
342 /** Issue EraseRegister, and wait for completion. **/
c2e34447 343 _outw(address + ((0x03)<<6), ioaddr + regEepromCommand_0_w);
748534f4
JP		 344 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
345
346 /** Send the new data to the eeprom, and wait for completion. **/
c2e34447
JW		 347 _outw(value, ioaddr + regEepromData_0_w);
348 _outw(0x30, ioaddr + regEepromCommand_0_w);
748534f4
JP		 349 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
350
351 /** Burn the new data into the eeprom, and wait for completion. **/
c2e34447 352 _outw(address + ((0x01)<<6), ioaddr + regEepromCommand_0_w);
748534f4
JP		 353 while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
354
355 return 0;
356 }
357#endif
358
359#ifdef CFG_3C90X_BOOTROM_FIX
360/*** a3c90x_internal_WriteEeprom - write data to the serial eeprom,
361 *** and re-compute the eeprom checksum.
362 ***/
363static int
364a3c90x_internal_WriteEeprom(int ioaddr, int address, unsigned short value)
365 {
366 int cksum = 0,v;
367 int i;
368 int maxAddress, cksumAddress;
369
370 if (INF_3C90X.isBrev)
371 {
372 maxAddress=0x1f;
373 cksumAddress=0x20;
374 }
375 else
376 {
377 maxAddress=0x16;
378 cksumAddress=0x17;
379 }
380
381 /** Write the value. **/
382 if (a3c90x_internal_WriteEepromWord(ioaddr, address, value) == -1)
383 return -1;
384
385 /** Recompute the checksum. **/
386 for(i=0;i<=maxAddress;i++)
387 {
388 v = a3c90x_internal_ReadEeprom(ioaddr, i);
389 cksum ^= (v & 0xFF);
390 cksum ^= ((v>>8) & 0xFF);
391 }
392 /** Write the checksum to the location in the eeprom **/
393 if (a3c90x_internal_WriteEepromWord(ioaddr, cksumAddress, cksum) == -1)
394 return -1;
395
396 return 0;
397 }
398#endif
399
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
404 *** image.
405 ***/
406static void a3c90x_reset(void)
407 {
748534f4 408 /** Send the reset command to the card **/
99182958 409 outputf("3c90x: issuing RESET");
31ddf9b3 410 _issue_command(INF_3C90X.IOAddr, cmdGlobalReset, 0);
748534f4
JP		 411
412 /** global reset command resets station mask, non-B revision cards
413 ** require explicit reset of values
414 **/
31ddf9b3 415 _set_window(INF_3C90X.IOAddr, winAddressing2);
c2e34447
JW		 416 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+0);
417 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
418 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
748534f4 419
748534f4 420 /** Issue transmit reset, wait for command completion **/
31ddf9b3 421 _issue_command(INF_3C90X.IOAddr, cmdTxReset, 0);
748534f4 422 if (! INF_3C90X.isBrev)
c2e34447 423 _outb(0x01, INF_3C90X.IOAddr + regTxFreeThresh_b);
31ddf9b3 424 _issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
748534f4
JP		 425
426 /**
427 ** reset of the receiver on B-revision cards re-negotiates the link
428 ** takes several seconds (a computer eternity)
429 **/
430 if (INF_3C90X.isBrev)
31ddf9b3 431 _issue_command(INF_3C90X.IOAddr, cmdRxReset, 0x04);
748534f4 432 else
31ddf9b3
JW		 433 _issue_command(INF_3C90X.IOAddr, cmdRxReset, 0x00);
434 while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
435 ;
436 _issue_command(INF_3C90X.IOAddr, cmdRxEnable, 0);
748534f4 437
31ddf9b3 438 _issue_command(INF_3C90X.IOAddr, cmdSetInterruptEnable, 0);
748534f4 439 /** enable rxComplete and txComplete **/
31ddf9b3 440 _issue_command(INF_3C90X.IOAddr, cmdSetIndicationEnable, 0x0014);
748534f4 441 /** acknowledge any pending status flags **/
31ddf9b3 442 _issue_command(INF_3C90X.IOAddr, cmdAcknowledgeInterrupt, 0x661);
748534f4
JP		 443
444 return;
445 }
446
447
448
449/*** a3c90x_transmit: exported function that transmits a packet. Does not
450 *** return any particular status. Parameters are:
451 *** dest_addr[6] - destination address, ethernet;
452 *** proto - protocol type (ARP, IP, etc);
453 *** size - size of the non-header part of the packet that needs transmitted;
454 *** pkt - the pointer to the packet data itself.
455 ***/
456static void
54d4b877 457a3c90x_transmit(struct pbuf *p)
31ddf9b3 458{
31ddf9b3 459 unsigned char status;
057f0bb9 460 static struct pbuf *oldpbuf = NULL;
54d4b877 461 unsigned int n, len;
f8903fdd 462
057f0bb9 463 if (oldpbuf)
f8903fdd
JW		 464 {
465 while (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_TXCOMPLETE) && oneshot_running())
466 ;
467 if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_TXCOMPLETE))
468 {
469 outputf("3c90x: tx timeout? txstat %02x", inb(INF_3C90X.IOAddr + regTxStatus_b));
470 outputf("3c90x: Gen sts %04x", inw(INF_3C90X.IOAddr + regCommandIntStatus_w));
471 }
472 status = inb(INF_3C90X.IOAddr + regTxStatus_b);
473 outb(INF_3C90X.IOAddr + regTxStatus_b, 0x00);
057f0bb9
JW		 474 pbuf_free(oldpbuf);
475 oldpbuf = NULL;
f8903fdd 476 }
3dd054cf 477
037ce545
JW		 478 _issue_command(INF_3C90X.IOAddr, cmdStallCtl, 2 /* Stall download */);
479
480 /** Setup the DPD (download descriptor) **/
9c86d6da 481 txdesc.next = 0;
54d4b877
JW		 482 len = 0;
483 n = 0;
057f0bb9 484 oldpbuf = p;
54d4b877
JW		 485 for (; p; p = p->next)
486 {
9c86d6da
JW		 487 txdesc.segments[n].addr = v2p(p->payload);
488 txdesc.segments[n].len = p->len | (p->next ? 0 : (1 << 31));
54d4b877 489 len += p->len;
057f0bb9 490 pbuf_ref(p);
54d4b877
JW		 491 n++;
492 }
037ce545 493 /** set notification for transmission completion (bit 15) **/
9c86d6da 494 txdesc.hdr = (len) | 0x8000;
037ce545 495
54d4b877
JW		 496 outputf("3c90x: Sending %d byte %d seg packet", len, n);
497
037ce545 498 /** Send the packet **/
9c86d6da 499 outl(INF_3C90X.IOAddr + regDnListPtr_l, v2p(&txdesc));
037ce545 500 _issue_command(INF_3C90X.IOAddr, cmdStallCtl, 3 /* Unstall download */);
31ddf9b3 501
037ce545
JW		 502 oneshot_start_ms(10);
503 while((inl(INF_3C90X.IOAddr + regDnListPtr_l) != 0) && oneshot_running())
504 ;
505 if (!oneshot_running())
506 {
507 outputf("3c90x: Download engine pointer timeout");
508 return;
509 }
3dd054cf 510
3dd054cf 511#if 0
037ce545
JW		 512 /** successful completion (sans "interrupt Requested" bit) **/
513 if ((status & 0xbf) == 0x80)
514 return;
31ddf9b3 515
037ce545
JW		 516 outputf("3c90x: Status (%hhX)", status);
517 /** check error codes **/
518 if (status & 0x02)
519 {
520 outputf("3c90x: Tx Reclaim Error (%hhX)", status);
521 a3c90x_reset();
522 } else if (status & 0x04) {
523 outputf("3c90x: Tx Status Overflow (%hhX)", status);
524 for (i=0; i<32; i++)
525 _outb(0x00, INF_3C90X.IOAddr + regTxStatus_b);
526 /** must re-enable after max collisions before re-issuing tx **/
527 _issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
528 } else if (status & 0x08) {
529 outputf("3c90x: Tx Max Collisions (%hhX)", status);
530 /** must re-enable after max collisions before re-issuing tx **/
531 _issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
532 } else if (status & 0x10) {
533 outputf("3c90x: Tx Underrun (%hhX)", status);
534 a3c90x_reset();
535 } else if (status & 0x20) {
536 outputf("3c90x: Tx Jabber (%hhX)", status);
537 a3c90x_reset();
538 } else if ((status & 0x80) != 0x80) {
539 outputf("3c90x: Internal Error - Incomplete Transmission (%hhX)", status);
540 a3c90x_reset();
748534f4 541 }
037ce545 542#endif
31ddf9b3 543}
748534f4
JP		 544
545
546
547/*** a3c90x_poll: exported routine that waits for a certain length of time
548 *** for a packet, and if it sees none, returns 0. This routine should
549 *** copy the packet to nic->packet if it gets a packet and set the size
550 *** in nic->packetlen. Return 1 if a packet was found.
551 ***/
9c86d6da
JW		 552static struct pbuf * a3c90x_poll(struct nic *nic)
553{
554 int i, errcode;
555 struct pbuf *p, *q;
556
557 /* Upload engine acks rxComplete for us later. */
558 if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & 0x0010))
559 return NULL;
560
561 p = pbuf_alloc(PBUF_RAW, 1536 /* XXX magic Max len */, PBUF_POOL);
562 if (!p)
748534f4 563 {
9c86d6da
JW		 564 outputf("3c90x: out of memory for packet?");
565 return NULL;
748534f4
JP		 566 }
567
9c86d6da
JW		 568 /* We don't need to acknowledge rxComplete -- the upload engine does
569 * it for us.
570 */
748534f4 571
9c86d6da
JW		 572 /** Build the up-load descriptor **/
573 rxdesc.next = 0;
574 rxdesc.status = 0;
575 for (i = 0, q = p; q; q = q->next, i++)
748534f4 576 {
9c86d6da
JW		 577 rxdesc.segments[i].addr = v2p(q->payload);
578 rxdesc.segments[i].len = q->len | (q->next ? 0 : (1 << 31));
748534f4
JP		 579 }
580
9c86d6da
JW		 581 /** Submit the upload descriptor to the NIC **/
582 outl(INF_3C90X.IOAddr + regUpListPtr_l, v2p(&rxdesc));
748534f4 583
9c86d6da
JW		 584 /** Wait for upload completion (upComplete(15) or upError (14)) **/
585 for (i = 0; i < 40000; i++) /* XXX What is this shit?! */
586 ;
587 while((rxdesc.status & ((1<<14) | (1<<15))) == 0)
588 for (i = 0; i < 40000; i++)
589 ;
748534f4 590
9c86d6da
JW		 591 /** Check for Error (else we have good packet) **/
592 if (rxdesc.status & (1<<14))
593 {
594 errcode = rxdesc.status;
595 if (errcode & (1<<16))
596 outputf("3C90X: Rx Overrun (%hX)",errcode>>16);
597 else if (errcode & (1<<17))
598 outputf("3C90X: Runt Frame (%hX)",errcode>>16);
599 else if (errcode & (1<<18))
600 outputf("3C90X: Alignment Error (%hX)",errcode>>16);
601 else if (errcode & (1<<19))
602 outputf("3C90X: CRC Error (%hX)",errcode>>16);
603 else if (errcode & (1<<20))
604 outputf("3C90X: Oversized Frame (%hX)",errcode>>16);
605 else
606 outputf("3C90X: Packet error (%hX)",errcode>>16);
607 return NULL;
608 }
748534f4 609
9c86d6da
JW		 610 /* Resize the packet to how large it actually is. */
611 pbuf_realloc(p, rxdesc.status & 0x1FFF);
612
613 return p;
614}
748534f4
JP		 615
616/*** a3c90x_disable: exported routine to disable the card. What's this for?
617 *** the eepro100.c driver didn't have one, so I just left this one empty too.
618 *** Ideas anyone?
619 *** Must turn off receiver at least so stray packets will not corrupt memory
620 *** [Ken]
621 ***/
622void a3c90x_disable(struct dev *dev)
623{
624 /* reset and disable merge */
625 a3c90x_reset();
626 /* Disable the receiver and transmitter. */
c2e34447
JW		 627 _outw(cmdRxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w);
628 _outw(cmdTxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w);
748534f4
JP		 629}
630
631
632/*** a3c90x_probe: exported routine to probe for the 3c905 card and perform
633 *** initialization. If this routine is called, the pci functions did find the
634 *** card. We just have to init it here.
635 ***/
636static int a3c90x_probe(struct pci_dev * pci, void * data)
637{
748534f4
JP		 638 INF_3C90X.is3c556 = (pci->did == 0x6055);
639
640 int i, c;
c2e34447 641 unsigned short eeprom[0x100];
748534f4
JP		 642 unsigned int cfg;
643 unsigned int mopt;
644 unsigned int mstat;
645 unsigned short linktype;
646#define HWADDR_OFFSET 10
647
648 unsigned long ioaddr = 0;
649 for (i = 0; i < 6; i++) {
650 if (pci->bars[i].type == PCI_BAR_IO) {
651 ioaddr = pci->bars[i].addr;
652 break;
653 }
654 }
655
656 if (ioaddr == 0)
c2e34447
JW		 657 {
658 outputf("3c90x: Unable to find I/O address");
659 return 0;
660 }
661
662 /* Power it on */
663 pci_write16(pci->bus, pci->dev, pci->fn, 0xE0,
664 pci_read16(pci->bus, pci->dev, pci->fn, 0xE0) & ~0x3);
665
666 outputf("3c90x: Picked I/O address %04x", ioaddr);
047916ed 667 pci_bother_add(pci);
42125f27
JP		 668 nic.ioaddr = ioaddr & ~3;
669 nic.irqno = 0;
748534f4 670
c2e34447 671 INF_3C90X.IOAddr = ioaddr;
748534f4
JP		 672 INF_3C90X.CurrentWindow = 255;
673 switch (a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, 0x03))
674 {
675 case 0x9000: /** 10 Base TPO **/
676 case 0x9001: /** 10/100 T4 **/
677 case 0x9050: /** 10/100 TPO **/
678 case 0x9051: /** 10 Base Combo **/
679 INF_3C90X.isBrev = 0;
680 break;
681
682 case 0x9004: /** 10 Base TPO **/
683 case 0x9005: /** 10 Base Combo **/
684 case 0x9006: /** 10 Base TPO and Base2 **/
685 case 0x900A: /** 10 Base FL **/
686 case 0x9055: /** 10/100 TPO **/
687 case 0x9056: /** 10/100 T4 **/
688 case 0x905A: /** 10 Base FX **/
689 default:
690 INF_3C90X.isBrev = 1;
691 break;
692 }
693
694 /** Load the EEPROM contents **/
695 if (INF_3C90X.isBrev)
696 {
c2e34447 697 for(i=0;i<=/*0x20*/0x7F;i++)
748534f4
JP		 698 {
699 eeprom[i] = a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, i);
700 }
701
702#ifdef CFG_3C90X_BOOTROM_FIX
703 /** Set xcvrSelect in InternalConfig in eeprom. **/
704 /* only necessary for 3c905b revision cards with boot PROM bug!!! */
705 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x13, 0x0160);
706#endif
707
708#ifdef CFG_3C90X_XCVR
709 if (CFG_3C90X_XCVR == 255)
710 {
711 /** Clear the LanWorks register **/
712 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x16, 0);
713 }
714 else
715 {
716 /** Set the selected permanent-xcvrSelect in the
717 ** LanWorks register
718 **/
719 a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x16,
720 XCVR_MAGIC + ((CFG_3C90X_XCVR) & 0x000F));
721 }
722#endif
723 }
724 else
725 {
c2e34447 726 for(i=0;i<=/*0x17*/0x7F;i++)
748534f4
JP		 727 {
728 eeprom[i] = a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, i);
729 }
730 }
731
732 /** Print identification message **/
733#ifdef CFG_3C90X_BOOTROM_FIX
734 if (INF_3C90X.isBrev)
735 {
736 outputf("NOTE: 3c905b bootrom fix enabled; has side "
737 "effects. See 3c90x.txt for info.");
738 }
739#endif
740
741 /** Retrieve the Hardware address and print it on the screen. **/
742 INF_3C90X.HWAddr[0] = eeprom[HWADDR_OFFSET + 0]>>8;
743 INF_3C90X.HWAddr[1] = eeprom[HWADDR_OFFSET + 0]&0xFF;
744 INF_3C90X.HWAddr[2] = eeprom[HWADDR_OFFSET + 1]>>8;
745 INF_3C90X.HWAddr[3] = eeprom[HWADDR_OFFSET + 1]&0xFF;
746 INF_3C90X.HWAddr[4] = eeprom[HWADDR_OFFSET + 2]>>8;
747 INF_3C90X.HWAddr[5] = eeprom[HWADDR_OFFSET + 2]&0xFF;
c2e34447
JW		 748 outputf("MAC Address = %02x:%02x:%02x:%02x:%02x:%02x",
749 INF_3C90X.HWAddr[0],
750 INF_3C90X.HWAddr[1],
751 INF_3C90X.HWAddr[2],
752 INF_3C90X.HWAddr[3],
753 INF_3C90X.HWAddr[4],
754 INF_3C90X.HWAddr[5]);
748534f4
JP		 755
756 /** 3C556: Invert MII power **/
757 if (INF_3C90X.is3c556) {
758 unsigned int tmp;
31ddf9b3 759 _set_window(INF_3C90X.IOAddr, winAddressing2);
748534f4
JP		 760 tmp = inw(INF_3C90X.IOAddr + regResetOptions_2_w);
761 tmp |= 0x4000;
c2e34447 762 _outw(tmp, INF_3C90X.IOAddr + regResetOptions_2_w);
748534f4
JP		 763 }
764
765 /* Test if the link is good, if not continue */
31ddf9b3 766 _set_window(INF_3C90X.IOAddr, winDiagnostics4);
748534f4
JP		 767 mstat = inw(INF_3C90X.IOAddr + regMediaStatus_4_w);
768 if((mstat & (1<<11)) == 0) {
769 outputf("Valid link not established");
770 return 0;
771 }
772
773 /** Program the MAC address into the station address registers **/
31ddf9b3 774 _set_window(INF_3C90X.IOAddr, winAddressing2);
c2e34447
JW		 775 _outw(htons(eeprom[HWADDR_OFFSET + 0]), INF_3C90X.IOAddr + regStationAddress_2_3w);
776 _outw(htons(eeprom[HWADDR_OFFSET + 1]), INF_3C90X.IOAddr + regStationAddress_2_3w+2);
777 _outw(htons(eeprom[HWADDR_OFFSET + 2]), INF_3C90X.IOAddr + regStationAddress_2_3w+4);
778 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+0);
779 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
780 _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
748534f4
JP		 781
782 /** Fill in our entry in the etherboot arp table **/
783/* XXX ? for lwip?
784 for(i=0;i<ETH_ALEN;i++)
42125f27 785 nic.node_addr[i] = (eeprom[HWADDR_OFFSET + i/2] >> (8*((i&1)^1))) & 0xff;
748534f4
JP		 786*/
787
788 /** Read the media options register, print a message and set default
789 ** xcvr.
790 **
791 ** Uses Media Option command on B revision, Reset Option on non-B
792 ** revision cards -- same register address
793 **/
31ddf9b3 794 _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
748534f4
JP		 795 mopt = inw(INF_3C90X.IOAddr + regResetMediaOptions_3_w);
796
797 /** mask out VCO bit that is defined as 10baseFL bit on B-rev cards **/
798 if (! INF_3C90X.isBrev)
799 {
800 mopt &= 0x7F;
801 }
802
803 outputf("Connectors present: ");
804 c = 0;
805 linktype = 0x0008;
806 if (mopt & 0x01)
807 {
808 outputf("%s100Base-T4",(c++)?", ":"");
809 linktype = 0x0006;
810 }
811 if (mopt & 0x04)
812 {
813 outputf("%s100Base-FX",(c++)?", ":"");
814 linktype = 0x0005;
815 }
816 if (mopt & 0x10)
817 {
818 outputf("%s10Base-2",(c++)?", ":"");
819 linktype = 0x0003;
820 }
821 if (mopt & 0x20)
822 {
823 outputf("%sAUI",(c++)?", ":"");
824 linktype = 0x0001;
825 }
826 if (mopt & 0x40)
827 {
828 outputf("%sMII",(c++)?", ":"");
829 linktype = 0x0006;
830 }
831 if ((mopt & 0xA) == 0xA)
832 {
833 outputf("%s10Base-T / 100Base-TX",(c++)?", ":"");
834 linktype = 0x0008;
835 }
836 else if ((mopt & 0xA) == 0x2)
837 {
838 outputf("%s100Base-TX",(c++)?", ":"");
839 linktype = 0x0008;
840 }
841 else if ((mopt & 0xA) == 0x8)
842 {
843 outputf("%s10Base-T",(c++)?", ":"");
844 linktype = 0x0008;
845 }
846 outputf(".");
847
848 /** Determine transceiver type to use, depending on value stored in
849 ** eeprom 0x16
850 **/
851 if (INF_3C90X.isBrev)
852 {
853 if ((eeprom[0x16] & 0xFF00) == XCVR_MAGIC)
854 {
855 /** User-defined **/
856 linktype = eeprom[0x16] & 0x000F;
857 }
858 }
859 else
860 {
861#ifdef CFG_3C90X_XCVR
862 if (CFG_3C90X_XCVR != 255)
863 linktype = CFG_3C90X_XCVR;
864#endif /* CFG_3C90X_XCVR */
865
866 /** I don't know what MII MAC only mode is!!! **/
867 if (linktype == 0x0009)
868 {
869 if (INF_3C90X.isBrev)
870 outputf("WARNING: MII External MAC Mode only supported on B-revision "
871 "cards!!!!\nFalling Back to MII Mode\n");
872 linktype = 0x0006;
873 }
874 }
875
876 /** enable DC converter for 10-Base-T **/
877 if (linktype == 0x0003)
878 {
31ddf9b3 879 _issue_command(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
748534f4
JP		 880 }
881
882 /** Set the link to the type we just determined. **/
31ddf9b3 883 _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
748534f4
JP		 884 cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
885 cfg &= ~(0xF<<20);
886 cfg |= (linktype<<20);
c2e34447 887 _outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
748534f4
JP		 888
889 /** Now that we set the xcvr type, reset the Tx and Rx, re-enable. **/
31ddf9b3 890 _issue_command(INF_3C90X.IOAddr, cmdTxReset, 0);
748534f4 891 if (!INF_3C90X.isBrev)
c2e34447 892 _outb(0x01, INF_3C90X.IOAddr + regTxFreeThresh_b);
748534f4 893
31ddf9b3 894 _issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
748534f4
JP		 895
896 /**
897 ** reset of the receiver on B-revision cards re-negotiates the link
898 ** takes several seconds (a computer eternity)
899 **/
900 if (INF_3C90X.isBrev)
31ddf9b3 901 _issue_command(INF_3C90X.IOAddr, cmdRxReset, 0x04);
748534f4 902 else
31ddf9b3 903 _issue_command(INF_3C90X.IOAddr, cmdRxReset, 0x00);
748534f4
JP		 904
905 /** Set the RX filter = receive only individual pkts & multicast & bcast. **/
31ddf9b3
JW		 906 _issue_command(INF_3C90X.IOAddr, cmdSetRxFilter, 0x01 + 0x02 + 0x04);
907 _issue_command(INF_3C90X.IOAddr, cmdRxEnable, 0);
748534f4
JP		 908
909
910 /**
911 ** set Indication and Interrupt flags , acknowledge any IRQ's
912 **/
31ddf9b3
JW		 913 _issue_command(INF_3C90X.IOAddr, cmdSetInterruptEnable, 0);
914 _issue_command(INF_3C90X.IOAddr, cmdSetIndicationEnable, 0x0014);
915 _issue_command(INF_3C90X.IOAddr, cmdAcknowledgeInterrupt, 0x661);
748534f4
JP		 916
917 /* * Set our exported functions **/
9c86d6da 918 nic.recv = a3c90x_poll;
42125f27 919 nic.transmit = a3c90x_transmit;
47c41031 920 memcpy(nic.hwaddr, INF_3C90X.HWAddr, 6);
c2e34447 921 eth_register(&nic);
748534f4
JP		 922
923 return 1;
924}
925
926static struct pci_id a3c90x_nics[] = {
927/* Original 90x revisions: */
928PCI_ROM(0x10b7, 0x6055, "3c556", "3C556"), /* Huricane */
929PCI_ROM(0x10b7, 0x9000, "3c905-tpo", "3Com900-TPO"), /* 10 Base TPO */
930PCI_ROM(0x10b7, 0x9001, "3c905-t4", "3Com900-Combo"), /* 10/100 T4 */
931PCI_ROM(0x10b7, 0x9050, "3c905-tpo100", "3Com905-TX"), /* 100 Base TX / 10/100 TPO */
932PCI_ROM(0x10b7, 0x9051, "3c905-combo", "3Com905-T4"), /* 100 Base T4 / 10 Base Combo */
933/* Newer 90xB revisions: */
934PCI_ROM(0x10b7, 0x9004, "3c905b-tpo", "3Com900B-TPO"), /* 10 Base TPO */
935PCI_ROM(0x10b7, 0x9005, "3c905b-combo", "3Com900B-Combo"), /* 10 Base Combo */
936PCI_ROM(0x10b7, 0x9006, "3c905b-tpb2", "3Com900B-2/T"), /* 10 Base TP and Base2 */
937PCI_ROM(0x10b7, 0x900a, "3c905b-fl", "3Com900B-FL"), /* 10 Base FL */
938PCI_ROM(0x10b7, 0x9055, "3c905b-tpo100", "3Com905B-TX"), /* 10/100 TPO */
939PCI_ROM(0x10b7, 0x9056, "3c905b-t4", "3Com905B-T4"), /* 10/100 T4 */
940PCI_ROM(0x10b7, 0x9058, "3c905b-9058", "3Com905B-9058"), /* Cyclone 10/100/BNC */
941PCI_ROM(0x10b7, 0x905a, "3c905b-fx", "3Com905B-FL"), /* 100 Base FX / 10 Base FX */
942/* Newer 90xC revision: */
943PCI_ROM(0x10b7, 0x9200, "3c905c-tpo", "3Com905C-TXM"), /* 10/100 TPO (3C905C-TXM) */
944PCI_ROM(0x10b7, 0x9202, "3c920b-emb-ati", "3c920B-EMB-WNM (ATI Radeon 9100 IGP)"), /* 3c920B-EMB-WNM (ATI Radeon 9100 IGP) */
945PCI_ROM(0x10b7, 0x9210, "3c920b-emb-wnm","3Com20B-EMB WNM"),
946PCI_ROM(0x10b7, 0x9800, "3c980", "3Com980-Cyclone"), /* Cyclone */
947PCI_ROM(0x10b7, 0x9805, "3c9805", "3Com9805"), /* Dual Port Server Cyclone */
948PCI_ROM(0x10b7, 0x7646, "3csoho100-tx", "3CSOHO100-TX"), /* Hurricane */
949PCI_ROM(0x10b7, 0x4500, "3c450", "3Com450 HomePNA Tornado"),
950PCI_ROM(0x10b7, 0x1201, "3c982a", "3Com982A"),
951PCI_ROM(0x10b7, 0x1202, "3c982b", "3Com982B"),
952};
953
954struct pci_driver a3c90x_driver = {
955 .name = "3C90X",
956 .probe = a3c90x_probe,
957 .ids = a3c90x_nics,
958 .id_count = sizeof(a3c90x_nics)/sizeof(a3c90x_nics[0]),
959};
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