aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/3c509.c
blob: f791bf026e5191711d46308facecdb0d89b9e009 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
/* 3c509.c: A 3c509 EtherLink3 ethernet driver for linux. */
/*
	Written 1993-2000 by Donald Becker.

	Copyright 1994-2000 by Donald Becker.
	Copyright 1993 United States Government as represented by the
	Director, National Security Agency.	 This software may be used and
	distributed according to the terms of the GNU General Public License,
	incorporated herein by reference.

	This driver is for the 3Com EtherLinkIII series.

	The author may be reached as becker@scyld.com, or C/O
	Scyld Computing Corporation
	410 Severn Ave., Suite 210
	Annapolis MD 21403

	Known limitations:
	Because of the way 3c509 ISA detection works it's difficult to predict
	a priori which of several ISA-mode cards will be detected first.

	This driver does not use predictive interrupt mode, resulting in higher
	packet latency but lower overhead.  If interrupts are disabled for an
	unusually long time it could also result in missed packets, but in
	practice this rarely happens.


	FIXES:
		Alan Cox:       Removed the 'Unexpected interrupt' bug.
		Michael Meskes:	Upgraded to Donald Becker's version 1.07.
		Alan Cox:	Increased the eeprom delay. Regardless of
				what the docs say some people definitely
				get problems with lower (but in card spec)
				delays
		v1.10 4/21/97 Fixed module code so that multiple cards may be detected,
				other cleanups.  -djb
		Andrea Arcangeli:	Upgraded to Donald Becker's version 1.12.
		Rick Payne:	Fixed SMP race condition
		v1.13 9/8/97 Made 'max_interrupt_work' an insmod-settable variable -djb
		v1.14 10/15/97 Avoided waiting..discard message for fast machines -djb
		v1.15 1/31/98 Faster recovery for Tx errors. -djb
		v1.16 2/3/98 Different ID port handling to avoid sound cards. -djb
		v1.18 12Mar2001 Andrew Morton <andrewm@uow.edu.au>
			- Avoid bogus detect of 3c590's (Andrzej Krzysztofowicz)
			- Reviewed against 1.18 from scyld.com
		v1.18a 17Nov2001 Jeff Garzik <jgarzik@pobox.com>
			- ethtool support
		v1.18b 1Mar2002 Zwane Mwaikambo <zwane@commfireservices.com>
			- Power Management support
		v1.18c 1Mar2002 David Ruggiero <jdr@farfalle.com>
			- Full duplex support
		v1.19  16Oct2002 Zwane Mwaikambo <zwane@linuxpower.ca>
			- Additional ethtool features
		v1.19a 28Oct2002 Davud Ruggiero <jdr@farfalle.com>
			- Increase *read_eeprom udelay to workaround oops with 2 cards.
		v1.19b 08Nov2002 Marc Zyngier <maz@wild-wind.fr.eu.org>
		    - Introduce driver model for EISA cards.
*/

#define DRV_NAME	"3c509"
#define DRV_VERSION	"1.19b"
#define DRV_RELDATE	"08Nov2002"

/* A few values that may be tweaked. */

/* Time in jiffies before concluding the transmitter is hung. */
#define TX_TIMEOUT  (400*HZ/1000)
/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
static int max_interrupt_work = 10;

#include <linux/module.h>
#ifdef CONFIG_MCA
#include <linux/mca.h>
#endif
#include <linux/isapnp.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/errno.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/pm.h>
#include <linux/pm_legacy.h>
#include <linux/skbuff.h>
#include <linux/delay.h>	/* for udelay() */
#include <linux/spinlock.h>
#include <linux/ethtool.h>
#include <linux/device.h>
#include <linux/eisa.h>
#include <linux/bitops.h>

#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/irq.h>

static char versionA[] __initdata = DRV_NAME ".c:" DRV_VERSION " " DRV_RELDATE " becker@scyld.com\n";
static char versionB[] __initdata = "http://www.scyld.com/network/3c509.html\n";

#if defined(CONFIG_PM) && (defined(CONFIG_MCA) || defined(CONFIG_EISA))
#define EL3_SUSPEND
#endif

#ifdef EL3_DEBUG
static int el3_debug = EL3_DEBUG;
#else
static int el3_debug = 2;
#endif

/* Used to do a global count of all the cards in the system.  Must be
 * a global variable so that the mca/eisa probe routines can increment
 * it */
static int el3_cards = 0;

/* To minimize the size of the driver source I only define operating
   constants if they are used several times.  You'll need the manual
   anyway if you want to understand driver details. */
/* Offsets from base I/O address. */
#define EL3_DATA 0x00
#define EL3_CMD 0x0e
#define EL3_STATUS 0x0e
#define	 EEPROM_READ 0x80

#define EL3_IO_EXTENT	16

#define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)


/* The top five bits written to EL3_CMD are a command, the lower
   11 bits are the parameter, if applicable. */
enum c509cmd {
	TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
	RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
	TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
	FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
	SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
	SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
	StatsDisable = 22<<11, StopCoax = 23<<11, PowerUp = 27<<11,
	PowerDown = 28<<11, PowerAuto = 29<<11};

enum c509status {
	IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
	TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
	IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000, };

/* The SetRxFilter command accepts the following classes: */
enum RxFilter {
	RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8 };

/* Register window 1 offsets, the window used in normal operation. */
#define TX_FIFO		0x00
#define RX_FIFO		0x00
#define RX_STATUS 	0x08
#define TX_STATUS 	0x0B
#define TX_FREE		0x0C		/* Remaining free bytes in Tx buffer. */

#define WN0_CONF_CTRL	0x04		/* Window 0: Configuration control register */
#define WN0_ADDR_CONF	0x06		/* Window 0: Address configuration register */
#define WN0_IRQ		0x08		/* Window 0: Set IRQ line in bits 12-15. */
#define WN4_MEDIA	0x0A		/* Window 4: Various transcvr/media bits. */
#define	MEDIA_TP	0x00C0		/* Enable link beat and jabber for 10baseT. */
#define WN4_NETDIAG	0x06		/* Window 4: Net diagnostic */
#define FD_ENABLE	0x8000		/* Enable full-duplex ("external loopback") */

/*
 * Must be a power of two (we use a binary and in the
 * circular queue)
 */
#define SKB_QUEUE_SIZE	64

struct el3_private {
	struct net_device_stats stats;
	struct net_device *next_dev;
	spinlock_t lock;
	/* skb send-queue */
	int head, size;
	struct sk_buff *queue[SKB_QUEUE_SIZE];
	enum {
		EL3_MCA,
		EL3_PNP,
		EL3_EISA,
	} type;						/* type of device */
	struct device *dev;
};
static int id_port __initdata = 0x110;	/* Start with 0x110 to avoid new sound cards.*/
static struct net_device *el3_root_dev;

static ushort id_read_eeprom(int index);
static ushort read_eeprom(int ioaddr, int index);
static int el3_open(struct net_device *dev);
static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t el3_interrupt(int irq, void *dev_id);
static void update_stats(struct net_device *dev);
static struct net_device_stats *el3_get_stats(struct net_device *dev);
static int el3_rx(struct net_device *dev);
static int el3_close(struct net_device *dev);
static void set_multicast_list(struct net_device *dev);
static void el3_tx_timeout (struct net_device *dev);
static void el3_down(struct net_device *dev);
static void el3_up(struct net_device *dev);
static const struct ethtool_ops ethtool_ops;
#ifdef EL3_SUSPEND
static int el3_suspend(struct device *, pm_message_t);
static int el3_resume(struct device *);
#else
#define el3_suspend NULL
#define el3_resume NULL
#endif


/* generic device remove for all device types */
#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
static int el3_device_remove (struct device *device);
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
static void el3_poll_controller(struct net_device *dev);
#endif

#ifdef CONFIG_EISA
static struct eisa_device_id el3_eisa_ids[] = {
		{ "TCM5092" },
		{ "TCM5093" },
		{ "TCM5095" },
		{ "" }
};
MODULE_DEVICE_TABLE(eisa, el3_eisa_ids);

static int el3_eisa_probe (struct device *device);

static struct eisa_driver el3_eisa_driver = {
		.id_table = el3_eisa_ids,
		.driver   = {
				.name    = "3c509",
				.probe   = el3_eisa_probe,
				.remove  = __devexit_p (el3_device_remove),
				.suspend = el3_suspend,
				.resume  = el3_resume,
		}
};
#endif

#ifdef CONFIG_MCA
static int el3_mca_probe(struct device *dev);

static short el3_mca_adapter_ids[] __initdata = {
		0x627c,
		0x627d,
		0x62db,
		0x62f6,
		0x62f7,
		0x0000
};

static char *el3_mca_adapter_names[] __initdata = {
		"3Com 3c529 EtherLink III (10base2)",
		"3Com 3c529 EtherLink III (10baseT)",
		"3Com 3c529 EtherLink III (test mode)",
		"3Com 3c529 EtherLink III (TP or coax)",
		"3Com 3c529 EtherLink III (TP)",
		NULL
};

static struct mca_driver el3_mca_driver = {
		.id_table = el3_mca_adapter_ids,
		.driver = {
				.name = "3c529",
				.bus = &mca_bus_type,
				.probe = el3_mca_probe,
				.remove = __devexit_p(el3_device_remove),
				.suspend = el3_suspend,
				.resume  = el3_resume,
		},
};
#endif /* CONFIG_MCA */

#if defined(__ISAPNP__)
static struct isapnp_device_id el3_isapnp_adapters[] __initdata = {
	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
		ISAPNP_VENDOR('T', 'C', 'M'), ISAPNP_FUNCTION(0x5090),
		(long) "3Com Etherlink III (TP)" },
	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
		ISAPNP_VENDOR('T', 'C', 'M'), ISAPNP_FUNCTION(0x5091),
		(long) "3Com Etherlink III" },
	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
		ISAPNP_VENDOR('T', 'C', 'M'), ISAPNP_FUNCTION(0x5094),
		(long) "3Com Etherlink III (combo)" },
	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
		ISAPNP_VENDOR('T', 'C', 'M'), ISAPNP_FUNCTION(0x5095),
		(long) "3Com Etherlink III (TPO)" },
	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
		ISAPNP_VENDOR('T', 'C', 'M'), ISAPNP_FUNCTION(0x5098),
		(long) "3Com Etherlink III (TPC)" },
	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
		ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_FUNCTION(0x80f7),
		(long) "3Com Etherlink III compatible" },
	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
		ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_FUNCTION(0x80f8),
		(long) "3Com Etherlink III compatible" },
	{ }	/* terminate list */
};

static u16 el3_isapnp_phys_addr[8][3];
static int nopnp;
#endif /* __ISAPNP__ */

/* With the driver model introduction for EISA devices, both init
 * and cleanup have been split :
 * - EISA devices probe/remove starts in el3_eisa_probe/el3_device_remove
 * - MCA/ISA still use el3_probe
 *
 * Both call el3_common_init/el3_common_remove. */

static int __init el3_common_init(struct net_device *dev)
{
	struct el3_private *lp = netdev_priv(dev);
	short i;
	int err;

	spin_lock_init(&lp->lock);

	if (dev->mem_start & 0x05) { /* xcvr codes 1/3/4/12 */
		dev->if_port = (dev->mem_start & 0x0f);
	} else { /* xcvr codes 0/8 */
		/* use eeprom value, but save user's full-duplex selection */
		dev->if_port |= (dev->mem_start & 0x08);
	}

	/* The EL3-specific entries in the device structure. */
	dev->open = &el3_open;
	dev->hard_start_xmit = &el3_start_xmit;
	dev->stop = &el3_close;
	dev->get_stats = &el3_get_stats;
	dev->set_multicast_list = &set_multicast_list;
	dev->tx_timeout = el3_tx_timeout;
	dev->watchdog_timeo = TX_TIMEOUT;
#ifdef CONFIG_NET_POLL_CONTROLLER
	dev->poll_controller = el3_poll_controller;
#endif
	SET_ETHTOOL_OPS(dev, &ethtool_ops);

	err = register_netdev(dev);
	if (err) {
		printk(KERN_ERR "Failed to register 3c5x9 at %#3.3lx, IRQ %d.\n",
			dev->base_addr, dev->irq);
		release_region(dev->base_addr, EL3_IO_EXTENT);
		return err;
	}

	{
		const char *if_names[] = {"10baseT", "AUI", "undefined", "BNC"};
		printk("%s: 3c5x9 found at %#3.3lx, %s port, address ",
			dev->name, dev->base_addr,
			if_names[(dev->if_port & 0x03)]);
	}

	/* Read in the station address. */
	for (i = 0; i < 6; i++)
		printk(" %2.2x", dev->dev_addr[i]);
	printk(", IRQ %d.\n", dev->irq);

	if (el3_debug > 0)
		printk(KERN_INFO "%s" KERN_INFO "%s", versionA, versionB);
	return 0;

}

static void el3_common_remove (struct net_device *dev)
{
	struct el3_private *lp = netdev_priv(dev);

	(void) lp;				/* Keep gcc quiet... */
#if defined(__ISAPNP__)
	if (lp->type == EL3_PNP)
		pnp_device_detach(to_pnp_dev(lp->dev));
#endif

	unregister_netdev (dev);
	release_region(dev->base_addr, EL3_IO_EXTENT);
	free_netdev (dev);
}

static int __init el3_probe(int card_idx)
{
	struct net_device *dev;
	struct el3_private *lp;
	short lrs_state = 0xff, i;
	int ioaddr, irq, if_port;
	u16 phys_addr[3];
	static int current_tag;
	int err = -ENODEV;
#if defined(__ISAPNP__)
	static int pnp_cards;
	struct pnp_dev *idev = NULL;

	if (nopnp == 1)
		goto no_pnp;

	for (i=0; el3_isapnp_adapters[i].vendor != 0; i++) {
		int j;
		while ((idev = pnp_find_dev(NULL,
					    el3_isapnp_adapters[i].vendor,
					    el3_isapnp_adapters[i].function,
					    idev))) {
			if (pnp_device_attach(idev) < 0)
				continue;
			if (pnp_activate_dev(idev) < 0) {
__again:
				pnp_device_detach(idev);
				continue;
			}
			if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0))
				goto __again;
			ioaddr = pnp_port_start(idev, 0);
			if (!request_region(ioaddr, EL3_IO_EXTENT, "3c509 PnP")) {
				pnp_device_detach(idev);
				return -EBUSY;
			}
			irq = pnp_irq(idev, 0);
			if (el3_debug > 3)
				printk ("ISAPnP reports %s at i/o 0x%x, irq %d\n",
					(char*) el3_isapnp_adapters[i].driver_data, ioaddr, irq);
			EL3WINDOW(0);
			for (j = 0; j < 3; j++)
				el3_isapnp_phys_addr[pnp_cards][j] =
					phys_addr[j] =
						htons(read_eeprom(ioaddr, j));
			if_port = read_eeprom(ioaddr, 8) >> 14;
			dev = alloc_etherdev(sizeof (struct el3_private));
			if (!dev) {
					release_region(ioaddr, EL3_IO_EXTENT);
					pnp_device_detach(idev);
					return -ENOMEM;
			}

			SET_MODULE_OWNER(dev);
			SET_NETDEV_DEV(dev, &idev->dev);
			pnp_cards++;

			netdev_boot_setup_check(dev);
			goto found;
		}
	}
no_pnp:
#endif /* __ISAPNP__ */

	/* Select an open I/O location at 0x1*0 to do contention select. */
	for ( ; id_port < 0x200; id_port += 0x10) {
		if (!request_region(id_port, 1, "3c509"))
			continue;
		outb(0x00, id_port);
		outb(0xff, id_port);
		if (inb(id_port) & 0x01){
			release_region(id_port, 1);
			break;
		} else
			release_region(id_port, 1);
	}
	if (id_port >= 0x200) {
		/* Rare -- do we really need a warning? */
		printk(" WARNING: No I/O port available for 3c509 activation.\n");
		return -ENODEV;
	}

	/* Next check for all ISA bus boards by sending the ID sequence to the
	   ID_PORT.  We find cards past the first by setting the 'current_tag'
	   on cards as they are found.  Cards with their tag set will not
	   respond to subsequent ID sequences. */

	outb(0x00, id_port);
	outb(0x00, id_port);
	for(i = 0; i < 255; i++) {
		outb(lrs_state, id_port);
		lrs_state <<= 1;
		lrs_state = lrs_state & 0x100 ? lrs_state ^ 0xcf : lrs_state;
	}

	/* For the first probe, clear all board's tag registers. */
	if (current_tag == 0)
		outb(0xd0, id_port);
	else				/* Otherwise kill off already-found boards. */
		outb(0xd8, id_port);

	if (id_read_eeprom(7) != 0x6d50) {
		return -ENODEV;
	}

	/* Read in EEPROM data, which does contention-select.
	   Only the lowest address board will stay "on-line".
	   3Com got the byte order backwards. */
	for (i = 0; i < 3; i++) {
		phys_addr[i] = htons(id_read_eeprom(i));
	}

#if defined(__ISAPNP__)
	if (nopnp == 0) {
		/* The ISA PnP 3c509 cards respond to the ID sequence.
		   This check is needed in order not to register them twice. */
		for (i = 0; i < pnp_cards; i++) {
			if (phys_addr[0] == el3_isapnp_phys_addr[i][0] &&
			    phys_addr[1] == el3_isapnp_phys_addr[i][1] &&
			    phys_addr[2] == el3_isapnp_phys_addr[i][2])
			{
				if (el3_debug > 3)
					printk("3c509 with address %02x %02x %02x %02x %02x %02x was found by ISAPnP\n",
						phys_addr[0] & 0xff, phys_addr[0] >> 8,
						phys_addr[1] & 0xff, phys_addr[1] >> 8,
						phys_addr[2] & 0xff, phys_addr[2] >> 8);
				/* Set the adaptor tag so that the next card can be found. */
				outb(0xd0 + ++current_tag, id_port);
				goto no_pnp;
			}
		}
	}
#endif /* __ISAPNP__ */

	{
		unsigned int iobase = id_read_eeprom(8);
		if_port = iobase >> 14;
		ioaddr = 0x200 + ((iobase & 0x1f) << 4);
	}
	irq = id_read_eeprom(9) >> 12;

	dev = alloc_etherdev(sizeof (struct el3_private));
	if (!dev)
		return -ENOMEM;

	SET_MODULE_OWNER(dev);

	netdev_boot_setup_check(dev);

	/* Set passed-in IRQ or I/O Addr. */
	if (dev->irq > 1  &&  dev->irq < 16)
			irq = dev->irq;

	if (dev->base_addr) {
		if (dev->mem_end == 0x3c509 	/* Magic key */
		    && dev->base_addr >= 0x200  &&  dev->base_addr <= 0x3e0)
			ioaddr = dev->base_addr & 0x3f0;
		else if (dev->base_addr != ioaddr)
			goto out;
	}

	if (!request_region(ioaddr, EL3_IO_EXTENT, "3c509")) {
		err = -EBUSY;
		goto out;
	}

	/* Set the adaptor tag so that the next card can be found. */
	outb(0xd0 + ++current_tag, id_port);

	/* Activate the adaptor at the EEPROM location. */
	outb((ioaddr >> 4) | 0xe0, id_port);

	EL3WINDOW(0);
	if (inw(ioaddr) != 0x6d50)
		goto out1;

	/* Free the interrupt so that some other card can use it. */
	outw(0x0f00, ioaddr + WN0_IRQ);

#if defined(__ISAPNP__)
 found:							/* PNP jumps here... */
#endif /* __ISAPNP__ */

	memcpy(dev->dev_addr, phys_addr, sizeof(phys_addr));
	dev->base_addr = ioaddr;
	dev->irq = irq;
	dev->if_port = if_port;
	lp = netdev_priv(dev);
#if defined(__ISAPNP__)
	lp->dev = &idev->dev;
#endif
	err = el3_common_init(dev);

	if (err)
		goto out1;

	el3_cards++;
	lp->next_dev = el3_root_dev;
	el3_root_dev = dev;
	return 0;

out1:
#if defined(__ISAPNP__)
	if (idev)
		pnp_device_detach(idev);
#endif
out:
	free_netdev(dev);
	return err;
}

#ifdef CONFIG_MCA
static int __init el3_mca_probe(struct device *device)
{
	/* Based on Erik Nygren's (nygren@mit.edu) 3c529 patch,
	 * heavily modified by Chris Beauregard
	 * (cpbeaure@csclub.uwaterloo.ca) to support standard MCA
	 * probing.
	 *
	 * redone for multi-card detection by ZP Gu (zpg@castle.net)
	 * now works as a module */

	struct el3_private *lp;
	short i;
	int ioaddr, irq, if_port;
	u16 phys_addr[3];
	struct net_device *dev = NULL;
	u_char pos4, pos5;
	struct mca_device *mdev = to_mca_device(device);
	int slot = mdev->slot;
	int err;

	pos4 = mca_device_read_stored_pos(mdev, 4);
	pos5 = mca_device_read_stored_pos(mdev, 5);

	ioaddr = ((short)((pos4&0xfc)|0x02)) << 8;
	irq = pos5 & 0x0f;


	printk("3c529: found %s at slot %d\n",
		   el3_mca_adapter_names[mdev->index], slot + 1);

	/* claim the slot */
	strncpy(mdev->name, el3_mca_adapter_names[mdev->index],
			sizeof(mdev->name));
	mca_device_set_claim(mdev, 1);

	if_port = pos4 & 0x03;

	irq = mca_device_transform_irq(mdev, irq);
	ioaddr = mca_device_transform_ioport(mdev, ioaddr);
	if (el3_debug > 2) {
			printk("3c529: irq %d  ioaddr 0x%x  ifport %d\n", irq, ioaddr, if_port);
	}
	EL3WINDOW(0);
	for (i = 0; i < 3; i++) {
			phys_addr[i] = htons(read_eeprom(ioaddr, i));
	}

	dev = alloc_etherdev(sizeof (struct el3_private));
	if (dev == NULL) {
			release_region(ioaddr, EL3_IO_EXTENT);
			return -ENOMEM;
	}

	SET_MODULE_OWNER(dev);
	netdev_boot_setup_check(dev);

	memcpy(dev->dev_addr, phys_addr, sizeof(phys_addr));
	dev->base_addr = ioaddr;
	dev->irq = irq;
	dev->if_port = if_port;
	lp = netdev_priv(dev);
	lp->dev = device;
	lp->type = EL3_MCA;
	device->driver_data = dev;
	err = el3_common_init(dev);

	if (err) {
		device->driver_data = NULL;
		free_netdev(dev);
		return -ENOMEM;
	}

	el3_cards++;
	return 0;
}

#endif /* CONFIG_MCA */

#ifdef CONFIG_EISA
static int __init el3_eisa_probe (struct device *device)
{
	struct el3_private *lp;
	short i;
	int ioaddr, irq, if_port;
	u16 phys_addr[3];
	struct net_device *dev = NULL;
	struct eisa_device *edev;
	int err;

	/* Yeepee, The driver framework is calling us ! */
	edev = to_eisa_device (device);
	ioaddr = edev->base_addr;

	if (!request_region(ioaddr, EL3_IO_EXTENT, "3c509"))
		return -EBUSY;

	/* Change the register set to the configuration window 0. */
	outw(SelectWindow | 0, ioaddr + 0xC80 + EL3_CMD);

	irq = inw(ioaddr + WN0_IRQ) >> 12;
	if_port = inw(ioaddr + 6)>>14;
	for (i = 0; i < 3; i++)
		phys_addr[i] = htons(read_eeprom(ioaddr, i));

	/* Restore the "Product ID" to the EEPROM read register. */
	read_eeprom(ioaddr, 3);

	dev = alloc_etherdev(sizeof (struct el3_private));
	if (dev == NULL) {
		release_region(ioaddr, EL3_IO_EXTENT);
		return -ENOMEM;
	}

	SET_MODULE_OWNER(dev);

	netdev_boot_setup_check(dev);

	memcpy(dev->dev_addr, phys_addr, sizeof(phys_addr));
	dev->base_addr = ioaddr;
	dev->irq = irq;
	dev->if_port = if_port;
	lp = netdev_priv(dev);
	lp->dev = device;
	lp->type = EL3_EISA;
	eisa_set_drvdata (edev, dev);
	err = el3_common_init(dev);

	if (err) {
		eisa_set_drvdata (edev, NULL);
		free_netdev(dev);
		return err;
	}

	el3_cards++;
	return 0;
}
#endif

#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
/* This remove works for all device types.
 *
 * The net dev must be stored in the driver_data field */
static int __devexit el3_device_remove (struct device *device)
{
	struct net_device *dev;

	dev  = device->driver_data;

	el3_common_remove (dev);
	return 0;
}
#endif

/* Read a word from the EEPROM using the regular EEPROM access register.
   Assume that we are in register window zero.
 */
static ushort read_eeprom(int ioaddr, int index)
{
	outw(EEPROM_READ + index, ioaddr + 10);
	/* Pause for at least 162 us. for the read to take place.
	   Some chips seem to require much longer */
	mdelay(2);
	return inw(ioaddr + 12);
}

/* Read a word from the EEPROM when in the ISA ID probe state. */
static ushort __init id_read_eeprom(int index)
{
	int bit, word = 0;

	/* Issue read command, and pause for at least 162 us. for it to complete.
	   Assume extra-fast 16Mhz bus. */
	outb(EEPROM_READ + index, id_port);

	/* Pause for at least 162 us. for the read to take place. */
	/* Some chips seem to require much longer */
	mdelay(4);

	for (bit = 15; bit >= 0; bit--)
		word = (word << 1) + (inb(id_port) & 0x01);

	if (el3_debug > 3)
		printk("  3c509 EEPROM word %d %#4.4x.\n", index, word);

	return word;
}


static int
el3_open(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	int i;

	outw(TxReset, ioaddr + EL3_CMD);
	outw(RxReset, ioaddr + EL3_CMD);
	outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);

	i = request_irq(dev->irq, &el3_interrupt, 0, dev->name, dev);
	if (i)
		return i;

	EL3WINDOW(0);
	if (el3_debug > 3)
		printk("%s: Opening, IRQ %d	 status@%x %4.4x.\n", dev->name,
			   dev->irq, ioaddr + EL3_STATUS, inw(ioaddr + EL3_STATUS));

	el3_up(dev);

	if (el3_debug > 3)
		printk("%s: Opened 3c509  IRQ %d  status %4.4x.\n",
			   dev->name, dev->irq, inw(ioaddr + EL3_STATUS));

	return 0;
}

static void
el3_tx_timeout (struct net_device *dev)
{
	struct el3_private *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;

	/* Transmitter timeout, serious problems. */
	printk("%s: transmit timed out, Tx_status %2.2x status %4.4x "
		   "Tx FIFO room %d.\n",
		   dev->name, inb(ioaddr + TX_STATUS), inw(ioaddr + EL3_STATUS),
		   inw(ioaddr + TX_FREE));
	lp->stats.tx_errors++;
	dev->trans_start = jiffies;
	/* Issue TX_RESET and TX_START commands. */
	outw(TxReset, ioaddr + EL3_CMD);
	outw(TxEnable, ioaddr + EL3_CMD);
	netif_wake_queue(dev);
}


static int
el3_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct el3_private *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;
	unsigned long flags;

	netif_stop_queue (dev);

	lp->stats.tx_bytes += skb->len;

	if (el3_debug > 4) {
		printk("%s: el3_start_xmit(length = %u) called, status %4.4x.\n",
			   dev->name, skb->len, inw(ioaddr + EL3_STATUS));
	}
#if 0
#ifndef final_version
	{	/* Error-checking code, delete someday. */
		ushort status = inw(ioaddr + EL3_STATUS);
		if (status & 0x0001 		/* IRQ line active, missed one. */
			&& inw(ioaddr + EL3_STATUS) & 1) { 			/* Make sure. */
			printk("%s: Missed interrupt, status then %04x now %04x"
				   "  Tx %2.2x Rx %4.4x.\n", dev->name, status,
				   inw(ioaddr + EL3_STATUS), inb(ioaddr + TX_STATUS),
				   inw(ioaddr + RX_STATUS));
			/* Fake interrupt trigger by masking, acknowledge interrupts. */
			outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);
			outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
				 ioaddr + EL3_CMD);
			outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
		}
	}
#endif
#endif
	/*
	 *	We lock the driver against other processors. Note
	 *	we don't need to lock versus the IRQ as we suspended
	 *	that. This means that we lose the ability to take
	 *	an RX during a TX upload. That sucks a bit with SMP
	 *	on an original 3c509 (2K buffer)
	 *
	 *	Using disable_irq stops us crapping on other
	 *	time sensitive devices.
	 */

	spin_lock_irqsave(&lp->lock, flags);

	/* Put out the doubleword header... */
	outw(skb->len, ioaddr + TX_FIFO);
	outw(0x00, ioaddr + TX_FIFO);
	/* ... and the packet rounded to a doubleword. */
	outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);

	dev->trans_start = jiffies;
	if (inw(ioaddr + TX_FREE) > 1536)
		netif_start_queue(dev);
	else
		/* Interrupt us when the FIFO has room for max-sized packet. */
		outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);

	spin_unlock_irqrestore(&lp->lock, flags);

	dev_kfree_skb (skb);

	/* Clear the Tx status stack. */
	{
		short tx_status;
		int i = 4;

		while (--i > 0	&&	(tx_status = inb(ioaddr + TX_STATUS)) > 0) {
			if (tx_status & 0x38) lp->stats.tx_aborted_errors++;
			if (tx_status & 0x30) outw(TxReset, ioaddr + EL3_CMD);
			if (tx_status & 0x3C) outw(TxEnable, ioaddr + EL3_CMD);
			outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
		}
	}
	return 0;
}

/* The EL3 interrupt handler. */
static irqreturn_t
el3_interrupt(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	struct el3_private *lp;
	int ioaddr, status;
	int i = max_interrupt_work;

	lp = netdev_priv(dev);
	spin_lock(&lp->lock);

	ioaddr = dev->base_addr;

	if (el3_debug > 4) {
		status = inw(ioaddr + EL3_STATUS);
		printk("%s: interrupt, status %4.4x.\n", dev->name, status);
	}

	while ((status = inw(ioaddr + EL3_STATUS)) &
		   (IntLatch | RxComplete | StatsFull)) {

		if (status & RxComplete)
			el3_rx(dev);

		if (status & TxAvailable) {
			if (el3_debug > 5)
				printk("	TX room bit was handled.\n");
			/* There's room in the FIFO for a full-sized packet. */
			outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
			netif_wake_queue (dev);
		}
		if (status & (AdapterFailure | RxEarly | StatsFull | TxComplete)) {
			/* Handle all uncommon interrupts. */
			if (status & StatsFull)				/* Empty statistics. */
				update_stats(dev);
			if (status & RxEarly) {				/* Rx early is unused. */
				el3_rx(dev);
				outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
			}
			if (status & TxComplete) {			/* Really Tx error. */
				struct el3_private *lp = netdev_priv(dev);
				short tx_status;
				int i = 4;

				while (--i>0 && (tx_status = inb(ioaddr + TX_STATUS)) > 0) {
					if (tx_status & 0x38) lp->stats.tx_aborted_errors++;
					if (tx_status & 0x30) outw(TxReset, ioaddr + EL3_CMD);
					if (tx_status & 0x3C) outw(TxEnable, ioaddr + EL3_CMD);
					outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
				}
			}
			if (status & AdapterFailure) {
				/* Adapter failure requires Rx reset and reinit. */
				outw(RxReset, ioaddr + EL3_CMD);
				/* Set the Rx filter to the current state. */
				outw(SetRxFilter | RxStation | RxBroadcast
					 | (dev->flags & IFF_ALLMULTI ? RxMulticast : 0)
					 | (dev->flags & IFF_PROMISC ? RxProm : 0),
					 ioaddr + EL3_CMD);
				outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
				outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
			}
		}

		if (--i < 0) {
			printk("%s: Infinite loop in interrupt, status %4.4x.\n",
				   dev->name, status);
			/* Clear all interrupts. */
			outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
			break;
		}
		/* Acknowledge the IRQ. */
		outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD); /* Ack IRQ */
	}

	if (el3_debug > 4) {
		printk("%s: exiting interrupt, status %4.4x.\n", dev->name,
			   inw(ioaddr + EL3_STATUS));
	}
	spin_unlock(&lp->lock);
	return IRQ_HANDLED;
}


#ifdef CONFIG_NET_POLL_CONTROLLER
/*
 * Polling receive - used by netconsole and other diagnostic tools
 * to allow network i/o with interrupts disabled.
 */
static void el3_poll_controller(struct net_device *dev)
{
	disable_irq(dev->irq);
	el3_interrupt(dev->irq, dev);
	enable_irq(dev->irq);
}
#endif

static struct net_device_stats *
el3_get_stats(struct net_device *dev)
{
	struct el3_private *lp = netdev_priv(dev);
	unsigned long flags;

	/*
	 *	This is fast enough not to bother with disable IRQ
	 *	stuff.
	 */

	spin_lock_irqsave(&lp->lock, flags);
	update_stats(dev);
	spin_unlock_irqrestore(&lp->lock, flags);
	return &lp->stats;
}

/*  Update statistics.  We change to register window 6, so this should be run
	single-threaded if the device is active. This is expected to be a rare
	operation, and it's simpler for the rest of the driver to assume that
	window 1 is always valid rather than use a special window-state variable.
	*/
static void update_stats(struct net_device *dev)
{
	struct el3_private *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;

	if (el3_debug > 5)
		printk("   Updating the statistics.\n");
	/* Turn off statistics updates while reading. */
	outw(StatsDisable, ioaddr + EL3_CMD);
	/* Switch to the stats window, and read everything. */
	EL3WINDOW(6);
	lp->stats.tx_carrier_errors 	+= inb(ioaddr + 0);
	lp->stats.tx_heartbeat_errors	+= inb(ioaddr + 1);
	/* Multiple collisions. */	   inb(ioaddr + 2);
	lp->stats.collisions		+= inb(ioaddr + 3);
	lp->stats.tx_window_errors	+= inb(ioaddr + 4);
	lp->stats.rx_fifo_errors	+= inb(ioaddr + 5);
	lp->stats.tx_packets		+= inb(ioaddr + 6);
	/* Rx packets	*/		   inb(ioaddr + 7);
	/* Tx deferrals */		   inb(ioaddr + 8);
	inw(ioaddr + 10);	/* Total Rx and Tx octets. */
	inw(ioaddr + 12);

	/* Back to window 1, and turn statistics back on. */
	EL3WINDOW(1);
	outw(StatsEnable, ioaddr + EL3_CMD);
	return;
}

static int
el3_rx(struct net_device *dev)
{
	struct el3_private *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;
	short rx_status;

	if (el3_debug > 5)
		printk("   In rx_packet(), status %4.4x, rx_status %4.4x.\n",
			   inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
	while ((rx_status = inw(ioaddr + RX_STATUS)) > 0) {
		if (rx_status & 0x4000) { /* Error, update stats. */
			short error = rx_status & 0x3800;

			outw(RxDiscard, ioaddr + EL3_CMD);
			lp->stats.rx_errors++;
			switch (error) {
			case 0x0000:		lp->stats.rx_over_errors++; break;
			case 0x0800:		lp->stats.rx_length_errors++; break;
			case 0x1000:		lp->stats.rx_frame_errors++; break;
			case 0x1800:		lp->stats.rx_length_errors++; break;
			case 0x2000:		lp->stats.rx_frame_errors++; break;
			case 0x2800:		lp->stats.rx_crc_errors++; break;
			}
		} else {
			short pkt_len = rx_status & 0x7ff;
			struct sk_buff *skb;

			skb = dev_alloc_skb(pkt_len+5);
			lp->stats.rx_bytes += pkt_len;
			if (el3_debug > 4)
				printk("Receiving packet size %d status %4.4x.\n",
					   pkt_len, rx_status);
			if (skb != NULL) {
				skb->dev = dev;
				skb_reserve(skb, 2);     /* Align IP on 16 byte */

				/* 'skb->data' points to the start of sk_buff data area. */
				insl(ioaddr + RX_FIFO, skb_put(skb,pkt_len),
					 (pkt_len + 3) >> 2);

				outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */
				skb->protocol = eth_type_trans(skb,dev);
				netif_rx(skb);
				dev->last_rx = jiffies;
				lp->stats.rx_packets++;
				continue;
			}
			outw(RxDiscard, ioaddr + EL3_CMD);
			lp->stats.rx_dropped++;
			if (el3_debug)
				printk("%s: Couldn't allocate a sk_buff of size %d.\n",
					   dev->name, pkt_len);
		}
		inw(ioaddr + EL3_STATUS); 				/* Delay. */
		while (inw(ioaddr + EL3_STATUS) & 0x1000)
			printk(KERN_DEBUG "	Waiting for 3c509 to discard packet, status %x.\n",
				   inw(ioaddr + EL3_STATUS) );
	}

	return 0;
}

/*
 *     Set or clear the multicast filter for this adaptor.
 */
static void
set_multicast_list(struct net_device *dev)
{
	unsigned long flags;
	struct el3_private *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;

	if (el3_debug > 1) {
		static int old;
		if (old != dev->mc_count) {
			old = dev->mc_count;
			printk("%s: Setting Rx mode to %d addresses.\n", dev->name, dev->mc_count);
		}
	}
	spin_lock_irqsave(&lp->lock, flags);
	if (dev->flags&IFF_PROMISC) {
		outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm,
			 ioaddr + EL3_CMD);
	}
	else if (dev->mc_count || (dev->flags&IFF_ALLMULTI)) {
		outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast, ioaddr + EL3_CMD);
	}
	else
		outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
	spin_unlock_irqrestore(&lp->lock, flags);
}

static int
el3_close(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	struct el3_private *lp = netdev_priv(dev);

	if (el3_debug > 2)
		printk("%s: Shutting down ethercard.\n", dev->name);

	el3_down(dev);

	free_irq(dev->irq, dev);
	/* Switching back to window 0 disables the IRQ. */
	EL3WINDOW(0);
	if (lp->type != EL3_EISA) {
		/* But we explicitly zero the IRQ line select anyway. Don't do
		 * it on EISA cards, it prevents the module from getting an
		 * IRQ after unload+reload... */
		outw(0x0f00, ioaddr + WN0_IRQ);
	}

	return 0;
}

static int
el3_link_ok(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	u16 tmp;

	EL3WINDOW(4);
	tmp = inw(ioaddr + WN4_MEDIA);
	EL3WINDOW(1);
	return tmp & (1<<11);
}

static int
el3_netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
{
	u16 tmp;
	int ioaddr = dev->base_addr;

	EL3WINDOW(0);
	/* obtain current transceiver via WN4_MEDIA? */
	tmp = inw(ioaddr + WN0_ADDR_CONF);
	ecmd->transceiver = XCVR_INTERNAL;
	switch (tmp >> 14) {
	case 0:
		ecmd->port = PORT_TP;
		break;
	case 1:
		ecmd->port = PORT_AUI;
		ecmd->transceiver = XCVR_EXTERNAL;
		break;
	case 3:
		ecmd->port = PORT_BNC;
	default:
		break;
	}

	ecmd->duplex = DUPLEX_HALF;
	ecmd->supported = 0;
	tmp = inw(ioaddr + WN0_CONF_CTRL);
	if (tmp & (1<<13))
		ecmd->supported |= SUPPORTED_AUI;
	if (tmp & (1<<12))
		ecmd->supported |= SUPPORTED_BNC;
	if (tmp & (1<<9)) {
		ecmd->supported |= SUPPORTED_TP | SUPPORTED_10baseT_Half |
				SUPPORTED_10baseT_Full;	/* hmm... */
		EL3WINDOW(4);
		tmp = inw(ioaddr + WN4_NETDIAG);
		if (tmp & FD_ENABLE)
			ecmd->duplex = DUPLEX_FULL;
	}

	ecmd->speed = SPEED_10;
	EL3WINDOW(1);
	return 0;
}

static int
el3_netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
{
	u16 tmp;
	int ioaddr = dev->base_addr;

	if (ecmd->speed != SPEED_10)
		return -EINVAL;
	if ((ecmd->duplex != DUPLEX_HALF) && (ecmd->duplex != DUPLEX_FULL))
		return -EINVAL;
	if ((ecmd->transceiver != XCVR_INTERNAL) && (ecmd->transceiver != XCVR_EXTERNAL))
		return -EINVAL;

	/* change XCVR type */
	EL3WINDOW(0);
	tmp = inw(ioaddr + WN0_ADDR_CONF);
	switch (ecmd->port) {
	case PORT_TP:
		tmp &= ~(3<<14);
		dev->if_port = 0;
		break;
	case PORT_AUI:
		tmp |= (1<<14);
		dev->if_port = 1;
		break;
	case PORT_BNC:
		tmp |= (3<<14);
		dev->if_port = 3;
		break;
	default:
		return -EINVAL;
	}

	outw(tmp, ioaddr + WN0_ADDR_CONF);
	if (dev->if_port == 3) {
		/* fire up the DC-DC convertor if BNC gets enabled */
		tmp = inw(ioaddr + WN0_ADDR_CONF);
		if (tmp & (3 << 14)) {
			outw(StartCoax, ioaddr + EL3_CMD);
			udelay(800);
		} else
			return -EIO;
	}

	EL3WINDOW(4);
	tmp = inw(ioaddr + WN4_NETDIAG);
	if (ecmd->duplex == DUPLEX_FULL)
		tmp |= FD_ENABLE;
	else
		tmp &= ~FD_ENABLE;
	outw(tmp, ioaddr + WN4_NETDIAG);
	EL3WINDOW(1);

	return 0;
}

static void el3_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
	strcpy(info->driver, DRV_NAME);
	strcpy(info->version, DRV_VERSION);
}

static int el3_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
{
	struct el3_private *lp = netdev_priv(dev);
	int ret;

	spin_lock_irq(&lp->lock);
	ret = el3_netdev_get_ecmd(dev, ecmd);
	spin_unlock_irq(&lp->lock);
	return ret;
}

static int el3_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
{
	struct el3_private *lp = netdev_priv(dev);
	int ret;

	spin_lock_irq(&lp->lock);
	ret = el3_netdev_set_ecmd(dev, ecmd);
	spin_unlock_irq(&lp->lock);
	return ret;
}

static u32 el3_get_link(struct net_device *dev)
{
	struct el3_private *lp = netdev_priv(dev);
	u32 ret;

	spin_lock_irq(&lp->lock);
	ret = el3_link_ok(dev);
	spin_unlock_irq(&lp->lock);
	return ret;
}

static u32 el3_get_msglevel(struct net_device *dev)
{
	return el3_debug;
}

static void el3_set_msglevel(struct net_device *dev, u32 v)
{
	el3_debug = v;
}

static const struct ethtool_ops ethtool_ops = {
	.get_drvinfo = el3_get_drvinfo,
	.get_settings = el3_get_settings,
	.set_settings = el3_set_settings,
	.get_link = el3_get_link,
	.get_msglevel = el3_get_msglevel,
	.set_msglevel = el3_set_msglevel,
};

static void
el3_down(struct net_device *dev)
{
	int ioaddr = dev->base_addr;

	netif_stop_queue(dev);

	/* Turn off statistics ASAP.  We update lp->stats below. */
	outw(StatsDisable, ioaddr + EL3_CMD);

	/* Disable the receiver and transmitter. */
	outw(RxDisable, ioaddr + EL3_CMD);
	outw(TxDisable, ioaddr + EL3_CMD);

	if (dev->if_port == 3)
		/* Turn off thinnet power.  Green! */
		outw(StopCoax, ioaddr + EL3_CMD);
	else if (dev->if_port == 0) {
		/* Disable link beat and jabber, if_port may change here next open(). */
		EL3WINDOW(4);
		outw(inw(ioaddr + WN4_MEDIA) & ~MEDIA_TP, ioaddr + WN4_MEDIA);
	}

	outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);

	update_stats(dev);
}

static void
el3_up(struct net_device *dev)
{
	int i, sw_info, net_diag;
	int ioaddr = dev->base_addr;

	/* Activating the board required and does no harm otherwise */
	outw(0x0001, ioaddr + 4);

	/* Set the IRQ line. */
	outw((dev->irq << 12) | 0x0f00, ioaddr + WN0_IRQ);

	/* Set the station address in window 2 each time opened. */
	EL3WINDOW(2);

	for (i = 0; i < 6; i++)
		outb(dev->dev_addr[i], ioaddr + i);

	if ((dev->if_port & 0x03) == 3) /* BNC interface */
		/* Start the thinnet transceiver. We should really wait 50ms...*/
		outw(StartCoax, ioaddr + EL3_CMD);
	else if ((dev->if_port & 0x03) == 0) { /* 10baseT interface */
		/* Combine secondary sw_info word (the adapter level) and primary
			sw_info word (duplex setting plus other useless bits) */
		EL3WINDOW(0);
		sw_info = (read_eeprom(ioaddr, 0x14) & 0x400f) |
			(read_eeprom(ioaddr, 0x0d) & 0xBff0);

		EL3WINDOW(4);
		net_diag = inw(ioaddr + WN4_NETDIAG);
		net_diag = (net_diag | FD_ENABLE); /* temporarily assume full-duplex will be set */
		printk("%s: ", dev->name);
		switch (dev->if_port & 0x0c) {
			case 12:
				/* force full-duplex mode if 3c5x9b */
				if (sw_info & 0x000f) {
					printk("Forcing 3c5x9b full-duplex mode");
					break;
				}
			case 8:
				/* set full-duplex mode based on eeprom config setting */
				if ((sw_info & 0x000f) && (sw_info & 0x8000)) {
					printk("Setting 3c5x9b full-duplex mode (from EEPROM configuration bit)");
					break;
				}
			default:
				/* xcvr=(0 || 4) OR user has an old 3c5x9 non "B" model */
				printk("Setting 3c5x9/3c5x9B half-duplex mode");
				net_diag = (net_diag & ~FD_ENABLE); /* disable full duplex */
		}

		outw(net_diag, ioaddr + WN4_NETDIAG);
		printk(" if_port: %d, sw_info: %4.4x\n", dev->if_port, sw_info);
		if (el3_debug > 3)
			printk("%s: 3c5x9 net diag word is now: %4.4x.\n", dev->name, net_diag);
		/* Enable link beat and jabber check. */
		outw(inw(ioaddr + WN4_MEDIA) | MEDIA_TP, ioaddr + WN4_MEDIA);
	}

	/* Switch to the stats window, and clear all stats by reading. */
	outw(StatsDisable, ioaddr + EL3_CMD);
	EL3WINDOW(6);
	for (i = 0; i < 9; i++)
		inb(ioaddr + i);
	inw(ioaddr + 10);
	inw(ioaddr + 12);

	/* Switch to register set 1 for normal use. */
	EL3WINDOW(1);

	/* Accept b-case and phys addr only. */
	outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
	outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */

	outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
	outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
	/* Allow status bits to be seen. */
	outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
	/* Ack all pending events, and set active indicator mask. */
	outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
		 ioaddr + EL3_CMD);
	outw(SetIntrEnb | IntLatch|TxAvailable|TxComplete|RxComplete|StatsFull,
		 ioaddr + EL3_CMD);

	netif_start_queue(dev);
}

/* Power Management support functions */
#ifdef EL3_SUSPEND

static int
el3_suspend(struct device *pdev, pm_message_t state)
{
	unsigned long flags;
	struct net_device *dev;
	struct el3_private *lp;
	int ioaddr;

	dev = pdev->driver_data;
	lp = netdev_priv(dev);
	ioaddr = dev->base_addr;

	spin_lock_irqsave(&lp->lock, flags);

	if (netif_running(dev))
		netif_device_detach(dev);

	el3_down(dev);
	outw(PowerDown, ioaddr + EL3_CMD);

	spin_unlock_irqrestore(&lp->lock, flags);
	return 0;
}

static int
el3_resume(struct device *pdev)
{
	unsigned long flags;
	struct net_device *dev;
	struct el3_private *lp;
	int ioaddr;

	dev = pdev->driver_data;
	lp = netdev_priv(dev);
	ioaddr = dev->base_addr;

	spin_lock_irqsave(&lp->lock, flags);

	outw(PowerUp, ioaddr + EL3_CMD);
	el3_up(dev);

	if (netif_running(dev))
		netif_device_attach(dev);

	spin_unlock_irqrestore(&lp->lock, flags);
	return 0;
}

#endif /* EL3_SUSPEND */

/* Parameters that may be passed into the module. */
static int debug = -1;
static int irq[] = {-1, -1, -1, -1, -1, -1, -1, -1};
static int xcvr[] = {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1};

module_param(debug,int, 0);
module_param_array(irq, int, NULL, 0);
module_param_array(xcvr, int, NULL, 0);
module_param(max_interrupt_work, int, 0);
MODULE_PARM_DESC(debug, "debug level (0-6)");
MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
MODULE_PARM_DESC(xcvr,"transceiver(s) (0=internal, 1=external)");
MODULE_PARM_DESC(max_interrupt_work, "maximum events handled per interrupt");
#if defined(__ISAPNP__)
module_param(nopnp, int, 0);
MODULE_PARM_DESC(nopnp, "disable ISA PnP support (0-1)");
MODULE_DEVICE_TABLE(isapnp, el3_isapnp_adapters);
#endif	/* __ISAPNP__ */
MODULE_DESCRIPTION("3Com Etherlink III (3c509, 3c509B) ISA/PnP ethernet driver");
MODULE_LICENSE("GPL");

static int __init el3_init_module(void)
{
	int ret = 0;
	el3_cards = 0;

	if (debug >= 0)
		el3_debug = debug;

	el3_root_dev = NULL;
	while (el3_probe(el3_cards) == 0) {
		if (irq[el3_cards] > 1)
			el3_root_dev->irq = irq[el3_cards];
		if (xcvr[el3_cards] >= 0)
			el3_root_dev->if_port = xcvr[el3_cards];
		el3_cards++;
	}

#ifdef CONFIG_EISA
	ret = eisa_driver_register(&el3_eisa_driver);
#endif
#ifdef CONFIG_MCA
	{
		int err = mca_register_driver(&el3_mca_driver);
		if (ret == 0)
			ret = err;
	}
#endif
	return ret;
}

static void __exit el3_cleanup_module(void)
{
	struct net_device *next_dev;

	while (el3_root_dev) {
		struct el3_private *lp = netdev_priv(el3_root_dev);

		next_dev = lp->next_dev;
		el3_common_remove (el3_root_dev);
		el3_root_dev = next_dev;
	}

#ifdef CONFIG_EISA
	eisa_driver_unregister (&el3_eisa_driver);
#endif
#ifdef CONFIG_MCA
	mca_unregister_driver(&el3_mca_driver);
#endif
}

module_init (el3_init_module);
module_exit (el3_cleanup_module);