aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/pcmcia/axnet_cs.c
blob: 871ad2958ff6e8c0b9e5c3ad622b61f00df1422f (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
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
/*======================================================================

    A PCMCIA ethernet driver for Asix AX88190-based cards

    The Asix AX88190 is a NS8390-derived chipset with a few nasty
    idiosyncracies that make it very inconvenient to support with a
    standard 8390 driver.  This driver is based on pcnet_cs, with the
    tweaked 8390 code grafted on the end.  Much of what I did was to
    clean up and update a similar driver supplied by Asix, which was
    adapted by William Lee, william@asix.com.tw.

    Copyright (C) 2001 David A. Hinds -- dahinds@users.sourceforge.net

    axnet_cs.c 1.28 2002/06/29 06:27:37

    The network driver code is based on Donald Becker's NE2000 code:

    Written 1992,1993 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.
    Donald Becker may be reached at becker@scyld.com

======================================================================*/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
#include <linux/crc32.h>
#include "../8390.h"

#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ciscode.h>
#include <pcmcia/ds.h>
#include <pcmcia/cisreg.h>

#include <asm/io.h>
#include <asm/system.h>
#include <asm/byteorder.h>
#include <asm/uaccess.h>

#define AXNET_CMD	0x00
#define AXNET_DATAPORT	0x10	/* NatSemi-defined port window offset. */
#define AXNET_RESET	0x1f	/* Issue a read to reset, a write to clear. */
#define AXNET_MII_EEP	0x14	/* Offset of MII access port */
#define AXNET_TEST	0x15	/* Offset of TEST Register port */
#define AXNET_GPIO	0x17	/* Offset of General Purpose Register Port */

#define AXNET_START_PG	0x40	/* First page of TX buffer */
#define AXNET_STOP_PG	0x80	/* Last page +1 of RX ring */

#define AXNET_RDC_TIMEOUT 0x02	/* Max wait in jiffies for Tx RDC */

#define IS_AX88190	0x0001
#define IS_AX88790	0x0002

/*====================================================================*/

/* Module parameters */

MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
MODULE_LICENSE("GPL");

#ifdef PCMCIA_DEBUG
#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)

INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
static char *version =
"axnet_cs.c 1.28 2002/06/29 06:27:37 (David Hinds)";
#else
#define DEBUG(n, args...)
#endif

/*====================================================================*/

static int axnet_config(struct pcmcia_device *link);
static void axnet_release(struct pcmcia_device *link);
static int axnet_open(struct net_device *dev);
static int axnet_close(struct net_device *dev);
static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static const struct ethtool_ops netdev_ethtool_ops;
static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
static void ei_watchdog(u_long arg);
static void axnet_reset_8390(struct net_device *dev);

static int mdio_read(unsigned int addr, int phy_id, int loc);
static void mdio_write(unsigned int addr, int phy_id, int loc, int value);

static void get_8390_hdr(struct net_device *,
			 struct e8390_pkt_hdr *, int);
static void block_input(struct net_device *dev, int count,
			struct sk_buff *skb, int ring_offset);
static void block_output(struct net_device *dev, int count,
			 const u_char *buf, const int start_page);

static void axnet_detach(struct pcmcia_device *p_dev);

static void axdev_setup(struct net_device *dev);
static void AX88190_init(struct net_device *dev, int startp);
static int ax_open(struct net_device *dev);
static int ax_close(struct net_device *dev);
static irqreturn_t ax_interrupt(int irq, void *dev_id);

/*====================================================================*/

typedef struct axnet_dev_t {
	struct pcmcia_device	*p_dev;
    dev_node_t		node;
    caddr_t		base;
    struct timer_list	watchdog;
    int			stale, fast_poll;
    u_short		link_status;
    u_char		duplex_flag;
    int			phy_id;
    int			flags;
} axnet_dev_t;

static inline axnet_dev_t *PRIV(struct net_device *dev)
{
	void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
	return p;
}

/*======================================================================

    axnet_attach() creates an "instance" of the driver, allocating
    local data structures for one device.  The device is registered
    with Card Services.

======================================================================*/

static int axnet_probe(struct pcmcia_device *link)
{
    axnet_dev_t *info;
    struct net_device *dev;

    DEBUG(0, "axnet_attach()\n");

    dev = alloc_netdev(sizeof(struct ei_device) + sizeof(axnet_dev_t),
			"eth%d", axdev_setup);

    if (!dev)
	return -ENOMEM;

    info = PRIV(dev);
    info->p_dev = link;
    link->priv = dev;
    link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
    link->irq.IRQInfo1 = IRQ_LEVEL_ID;
    link->conf.Attributes = CONF_ENABLE_IRQ;
    link->conf.IntType = INT_MEMORY_AND_IO;

    dev->open = &axnet_open;
    dev->stop = &axnet_close;
    dev->do_ioctl = &axnet_ioctl;
    SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);

    return axnet_config(link);
} /* axnet_attach */

/*======================================================================

    This deletes a driver "instance".  The device is de-registered
    with Card Services.  If it has been released, all local data
    structures are freed.  Otherwise, the structures will be freed
    when the device is released.

======================================================================*/

static void axnet_detach(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;

    DEBUG(0, "axnet_detach(0x%p)\n", link);

    if (link->dev_node)
	unregister_netdev(dev);

    axnet_release(link);

    free_netdev(dev);
} /* axnet_detach */

/*======================================================================

    This probes for a card's hardware address by reading the PROM.

======================================================================*/

static int get_prom(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    unsigned int ioaddr = dev->base_addr;
    int i, j;

    /* This is based on drivers/net/ne.c */
    struct {
	u_char value, offset;
    } program_seq[] = {
	{E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
	{0x01,	EN0_DCFG},	/* Set word-wide access. */
	{0x00,	EN0_RCNTLO},	/* Clear the count regs. */
	{0x00,	EN0_RCNTHI},
	{0x00,	EN0_IMR},	/* Mask completion irq. */
	{0xFF,	EN0_ISR},
	{E8390_RXOFF|0x40, EN0_RXCR},	/* 0x60  Set to monitor */
	{E8390_TXOFF, EN0_TXCR},	/* 0x02  and loopback mode. */
	{0x10,	EN0_RCNTLO},
	{0x00,	EN0_RCNTHI},
	{0x00,	EN0_RSARLO},	/* DMA starting at 0x0400. */
	{0x04,	EN0_RSARHI},
	{E8390_RREAD+E8390_START, E8390_CMD},
    };

    /* Not much of a test, but the alternatives are messy */
    if (link->conf.ConfigBase != 0x03c0)
	return 0;

    axnet_reset_8390(dev);
    mdelay(10);

    for (i = 0; i < ARRAY_SIZE(program_seq); i++)
	outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);

    for (i = 0; i < 6; i += 2) {
	j = inw(ioaddr + AXNET_DATAPORT);
	dev->dev_addr[i] = j & 0xff;
	dev->dev_addr[i+1] = j >> 8;
    }
    return 1;
} /* get_prom */

/*======================================================================

    axnet_config() is scheduled to run after a CARD_INSERTION event
    is received, to configure the PCMCIA socket, and to make the
    ethernet device available to the system.

======================================================================*/

#define CS_CHECK(fn, ret) \
do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)

static int try_io_port(struct pcmcia_device *link)
{
    int j, ret;
    if (link->io.NumPorts1 == 32) {
	link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
	if (link->io.NumPorts2 > 0) {
	    /* for master/slave multifunction cards */
	    link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
	    link->irq.Attributes =
		IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
	}
    } else {
	/* This should be two 16-port windows */
	link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
	link->io.Attributes2 = IO_DATA_PATH_WIDTH_16;
    }
    if (link->io.BasePort1 == 0) {
	link->io.IOAddrLines = 16;
	for (j = 0; j < 0x400; j += 0x20) {
	    link->io.BasePort1 = j ^ 0x300;
	    link->io.BasePort2 = (j ^ 0x300) + 0x10;
	    ret = pcmcia_request_io(link, &link->io);
	    if (ret == 0)
		    return ret;
	}
	return ret;
    } else {
	return pcmcia_request_io(link, &link->io);
    }
}

static int axnet_configcheck(struct pcmcia_device *p_dev,
			     cistpl_cftable_entry_t *cfg,
			     cistpl_cftable_entry_t *dflt,
			     unsigned int vcc,
			     void *priv_data)
{
	int i;
	cistpl_io_t *io = &cfg->io;

	if (cfg->index == 0 || cfg->io.nwin == 0)
		return -ENODEV;

	p_dev->conf.ConfigIndex = 0x05;
	/* For multifunction cards, by convention, we configure the
	   network function with window 0, and serial with window 1 */
	if (io->nwin > 1) {
		i = (io->win[1].len > io->win[0].len);
		p_dev->io.BasePort2 = io->win[1-i].base;
		p_dev->io.NumPorts2 = io->win[1-i].len;
	} else {
		i = p_dev->io.NumPorts2 = 0;
	}
	p_dev->io.BasePort1 = io->win[i].base;
	p_dev->io.NumPorts1 = io->win[i].len;
	p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
	if (p_dev->io.NumPorts1 + p_dev->io.NumPorts2 >= 32)
		return try_io_port(p_dev);

	return -ENODEV;
}

static int axnet_config(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    axnet_dev_t *info = PRIV(dev);
    int i, j, last_ret, last_fn;

    DEBUG(0, "axnet_config(0x%p)\n", link);

    /* don't trust the CIS on this; Linksys got it wrong */
    link->conf.Present = 0x63;
    last_ret = pcmcia_loop_config(link, axnet_configcheck, NULL);
    if (last_ret != 0) {
	cs_error(link, RequestIO, last_ret);
	goto failed;
    }

    CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
    
    if (link->io.NumPorts2 == 8) {
	link->conf.Attributes |= CONF_ENABLE_SPKR;
	link->conf.Status = CCSR_AUDIO_ENA;
    }
    
    CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
    dev->irq = link->irq.AssignedIRQ;
    dev->base_addr = link->io.BasePort1;

    if (!get_prom(link)) {
	printk(KERN_NOTICE "axnet_cs: this is not an AX88190 card!\n");
	printk(KERN_NOTICE "axnet_cs: use pcnet_cs instead.\n");
	goto failed;
    }

    ei_status.name = "AX88190";
    ei_status.word16 = 1;
    ei_status.tx_start_page = AXNET_START_PG;
    ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
    ei_status.stop_page = AXNET_STOP_PG;
    ei_status.reset_8390 = &axnet_reset_8390;
    ei_status.get_8390_hdr = &get_8390_hdr;
    ei_status.block_input = &block_input;
    ei_status.block_output = &block_output;

    if (inb(dev->base_addr + AXNET_TEST) != 0)
	info->flags |= IS_AX88790;
    else
	info->flags |= IS_AX88190;

    if (info->flags & IS_AX88790)
	outb(0x10, dev->base_addr + AXNET_GPIO);  /* select Internal PHY */

    for (i = 0; i < 32; i++) {
	j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
	if ((j != 0) && (j != 0xffff)) break;
    }

    /* Maybe PHY is in power down mode. (PPD_SET = 1) 
       Bit 2 of CCSR is active low. */ 
    if (i == 32) {
	conf_reg_t reg = { 0, CS_WRITE, CISREG_CCSR, 0x04 };
 	pcmcia_access_configuration_register(link, &reg);
	for (i = 0; i < 32; i++) {
	    j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
	    if ((j != 0) && (j != 0xffff)) break;
	}
    }

    info->phy_id = (i < 32) ? i : -1;
    link->dev_node = &info->node;
    SET_NETDEV_DEV(dev, &handle_to_dev(link));

    if (register_netdev(dev) != 0) {
	printk(KERN_NOTICE "axnet_cs: register_netdev() failed\n");
	link->dev_node = NULL;
	goto failed;
    }

    strcpy(info->node.dev_name, dev->name);

    printk(KERN_INFO "%s: Asix AX88%d90: io %#3lx, irq %d, "
	   "hw_addr %pM\n",
	   dev->name, ((info->flags & IS_AX88790) ? 7 : 1),
	   dev->base_addr, dev->irq,
	   dev->dev_addr);
    if (info->phy_id != -1) {
	DEBUG(0, "  MII transceiver at index %d, status %x.\n", info->phy_id, j);
    } else {
	printk(KERN_NOTICE "  No MII transceivers found!\n");
    }
    return 0;

cs_failed:
    cs_error(link, last_fn, last_ret);
failed:
    axnet_release(link);
    return -ENODEV;
} /* axnet_config */

/*======================================================================

    After a card is removed, axnet_release() will unregister the net
    device, and release the PCMCIA configuration.  If the device is
    still open, this will be postponed until it is closed.

======================================================================*/

static void axnet_release(struct pcmcia_device *link)
{
	pcmcia_disable_device(link);
}

static int axnet_suspend(struct pcmcia_device *link)
{
	struct net_device *dev = link->priv;

	if (link->open)
		netif_device_detach(dev);

	return 0;
}

static int axnet_resume(struct pcmcia_device *link)
{
	struct net_device *dev = link->priv;

	if (link->open) {
		axnet_reset_8390(dev);
		AX88190_init(dev, 1);
		netif_device_attach(dev);
	}

	return 0;
}


/*======================================================================

    MII interface support

======================================================================*/

#define MDIO_SHIFT_CLK		0x01
#define MDIO_DATA_WRITE0	0x00
#define MDIO_DATA_WRITE1	0x08
#define MDIO_DATA_READ		0x04
#define MDIO_MASK		0x0f
#define MDIO_ENB_IN		0x02

static void mdio_sync(unsigned int addr)
{
    int bits;
    for (bits = 0; bits < 32; bits++) {
	outb_p(MDIO_DATA_WRITE1, addr);
	outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
    }
}

static int mdio_read(unsigned int addr, int phy_id, int loc)
{
    u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
    int i, retval = 0;

    mdio_sync(addr);
    for (i = 14; i >= 0; i--) {
	int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
	outb_p(dat, addr);
	outb_p(dat | MDIO_SHIFT_CLK, addr);
    }
    for (i = 19; i > 0; i--) {
	outb_p(MDIO_ENB_IN, addr);
	retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
	outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
    }
    return (retval>>1) & 0xffff;
}

static void mdio_write(unsigned int addr, int phy_id, int loc, int value)
{
    u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
    int i;

    mdio_sync(addr);
    for (i = 31; i >= 0; i--) {
	int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
	outb_p(dat, addr);
	outb_p(dat | MDIO_SHIFT_CLK, addr);
    }
    for (i = 1; i >= 0; i--) {
	outb_p(MDIO_ENB_IN, addr);
	outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
    }
}

/*====================================================================*/

static int axnet_open(struct net_device *dev)
{
    int ret;
    axnet_dev_t *info = PRIV(dev);
    struct pcmcia_device *link = info->p_dev;
    unsigned int nic_base = dev->base_addr;
    
    DEBUG(2, "axnet_open('%s')\n", dev->name);

    if (!pcmcia_dev_present(link))
	return -ENODEV;

    outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */
    ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
    if (ret)
	    return ret;

    link->open++;

    info->link_status = 0x00;
    init_timer(&info->watchdog);
    info->watchdog.function = &ei_watchdog;
    info->watchdog.data = (u_long)dev;
    info->watchdog.expires = jiffies + HZ;
    add_timer(&info->watchdog);

    return ax_open(dev);
} /* axnet_open */

/*====================================================================*/

static int axnet_close(struct net_device *dev)
{
    axnet_dev_t *info = PRIV(dev);
    struct pcmcia_device *link = info->p_dev;

    DEBUG(2, "axnet_close('%s')\n", dev->name);

    ax_close(dev);
    free_irq(dev->irq, dev);
    
    link->open--;
    netif_stop_queue(dev);
    del_timer_sync(&info->watchdog);

    return 0;
} /* axnet_close */

/*======================================================================

    Hard reset the card.  This used to pause for the same period that
    a 8390 reset command required, but that shouldn't be necessary.

======================================================================*/

static void axnet_reset_8390(struct net_device *dev)
{
    unsigned int nic_base = dev->base_addr;
    int i;

    ei_status.txing = ei_status.dmaing = 0;

    outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);

    outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);

    for (i = 0; i < 100; i++) {
	if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
	    break;
	udelay(100);
    }
    outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
    
    if (i == 100)
	printk(KERN_ERR "%s: axnet_reset_8390() did not complete.\n",
	       dev->name);
    
} /* axnet_reset_8390 */

/*====================================================================*/

static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
{
    struct net_device *dev = dev_id;
    PRIV(dev)->stale = 0;
    return ax_interrupt(irq, dev_id);
}

static void ei_watchdog(u_long arg)
{
    struct net_device *dev = (struct net_device *)(arg);
    axnet_dev_t *info = PRIV(dev);
    unsigned int nic_base = dev->base_addr;
    unsigned int mii_addr = nic_base + AXNET_MII_EEP;
    u_short link;

    if (!netif_device_present(dev)) goto reschedule;

    /* Check for pending interrupt with expired latency timer: with
       this, we can limp along even if the interrupt is blocked */
    if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
	if (!info->fast_poll)
	    printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name);
	ei_irq_wrapper(dev->irq, dev);
	info->fast_poll = HZ;
    }
    if (info->fast_poll) {
	info->fast_poll--;
	info->watchdog.expires = jiffies + 1;
	add_timer(&info->watchdog);
	return;
    }

    if (info->phy_id < 0)
	goto reschedule;
    link = mdio_read(mii_addr, info->phy_id, 1);
    if (!link || (link == 0xffff)) {
	printk(KERN_INFO "%s: MII is missing!\n", dev->name);
	info->phy_id = -1;
	goto reschedule;
    }

    link &= 0x0004;
    if (link != info->link_status) {
	u_short p = mdio_read(mii_addr, info->phy_id, 5);
	printk(KERN_INFO "%s: %s link beat\n", dev->name,
	       (link) ? "found" : "lost");
	if (link) {
	    info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
	    if (p)
		printk(KERN_INFO "%s: autonegotiation complete: "
		       "%sbaseT-%cD selected\n", dev->name,
		       ((p & 0x0180) ? "100" : "10"),
		       ((p & 0x0140) ? 'F' : 'H'));
	    else
		printk(KERN_INFO "%s: link partner did not autonegotiate\n",
		       dev->name);
	    AX88190_init(dev, 1);
	}
	info->link_status = link;
    }

reschedule:
    info->watchdog.expires = jiffies + HZ;
    add_timer(&info->watchdog);
}

static void netdev_get_drvinfo(struct net_device *dev,
			       struct ethtool_drvinfo *info)
{
	strcpy(info->driver, "axnet_cs");
}

static const struct ethtool_ops netdev_ethtool_ops = {
	.get_drvinfo		= netdev_get_drvinfo,
};

/*====================================================================*/

static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
    axnet_dev_t *info = PRIV(dev);
    u16 *data = (u16 *)&rq->ifr_ifru;
    unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
    switch (cmd) {
    case SIOCGMIIPHY:
	data[0] = info->phy_id;
    case SIOCGMIIREG:		/* Read MII PHY register. */
	data[3] = mdio_read(mii_addr, data[0], data[1] & 0x1f);
	return 0;
    case SIOCSMIIREG:		/* Write MII PHY register. */
	if (!capable(CAP_NET_ADMIN))
	    return -EPERM;
	mdio_write(mii_addr, data[0], data[1] & 0x1f, data[2]);
	return 0;
    }
    return -EOPNOTSUPP;
}

/*====================================================================*/

static void get_8390_hdr(struct net_device *dev,
			 struct e8390_pkt_hdr *hdr,
			 int ring_page)
{
    unsigned int nic_base = dev->base_addr;

    outb_p(0, nic_base + EN0_RSARLO);		/* On page boundary */
    outb_p(ring_page, nic_base + EN0_RSARHI);
    outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);

    insw(nic_base + AXNET_DATAPORT, hdr,
	    sizeof(struct e8390_pkt_hdr)>>1);
    /* Fix for big endian systems */
    hdr->count = le16_to_cpu(hdr->count);

}

/*====================================================================*/

static void block_input(struct net_device *dev, int count,
			struct sk_buff *skb, int ring_offset)
{
    unsigned int nic_base = dev->base_addr;
    int xfer_count = count;
    char *buf = skb->data;

#ifdef PCMCIA_DEBUG
    if ((ei_debug > 4) && (count != 4))
	printk(KERN_DEBUG "%s: [bi=%d]\n", dev->name, count+4);
#endif
    outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
    outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
    outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);

    insw(nic_base + AXNET_DATAPORT,buf,count>>1);
    if (count & 0x01)
	buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++;

}

/*====================================================================*/

static void block_output(struct net_device *dev, int count,
			 const u_char *buf, const int start_page)
{
    unsigned int nic_base = dev->base_addr;

#ifdef PCMCIA_DEBUG
    if (ei_debug > 4)
	printk(KERN_DEBUG "%s: [bo=%d]\n", dev->name, count);
#endif

    /* Round the count up for word writes.  Do we need to do this?
       What effect will an odd byte count have on the 8390?
       I should check someday. */
    if (count & 0x01)
	count++;

    outb_p(0x00, nic_base + EN0_RSARLO);
    outb_p(start_page, nic_base + EN0_RSARHI);
    outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
    outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
}

static struct pcmcia_device_id axnet_ids[] = {
	PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
	PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
	PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
	PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
	PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
	PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
	PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
	PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202), 
	PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
	PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
	PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
	PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
	PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
	PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
	PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
	PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
	PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
	PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
	PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
	PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
	PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
	PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
	PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6,  0xab9be5ef),
	PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, axnet_ids);

static struct pcmcia_driver axnet_cs_driver = {
	.owner		= THIS_MODULE,
	.drv		= {
		.name	= "axnet_cs",
	},
	.probe		= axnet_probe,
	.remove		= axnet_detach,
	.id_table       = axnet_ids,
	.suspend	= axnet_suspend,
	.resume		= axnet_resume,
};

static int __init init_axnet_cs(void)
{
	return pcmcia_register_driver(&axnet_cs_driver);
}

static void __exit exit_axnet_cs(void)
{
	pcmcia_unregister_driver(&axnet_cs_driver);
}

module_init(init_axnet_cs);
module_exit(exit_axnet_cs);

/*====================================================================*/

/* 8390.c: A general NS8390 ethernet driver core for linux. */
/*
	Written 1992-94 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.

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

  This is the chip-specific code for many 8390-based ethernet adaptors.
  This is not a complete driver, it must be combined with board-specific
  code such as ne.c, wd.c, 3c503.c, etc.

  Seeing how at least eight drivers use this code, (not counting the
  PCMCIA ones either) it is easy to break some card by what seems like
  a simple innocent change. Please contact me or Donald if you think
  you have found something that needs changing. -- PG

  Changelog:

  Paul Gortmaker	: remove set_bit lock, other cleanups.
  Paul Gortmaker	: add ei_get_8390_hdr() so we can pass skb's to 
			  ei_block_input() for eth_io_copy_and_sum().
  Paul Gortmaker	: exchange static int ei_pingpong for a #define,
			  also add better Tx error handling.
  Paul Gortmaker	: rewrite Rx overrun handling as per NS specs.
  Alexey Kuznetsov	: use the 8390's six bit hash multicast filter.
  Paul Gortmaker	: tweak ANK's above multicast changes a bit.
  Paul Gortmaker	: update packet statistics for v2.1.x
  Alan Cox		: support arbitary stupid port mappings on the
  			  68K Macintosh. Support >16bit I/O spaces
  Paul Gortmaker	: add kmod support for auto-loading of the 8390
			  module by all drivers that require it.
  Alan Cox		: Spinlocking work, added 'BUG_83C690'
  Paul Gortmaker	: Separate out Tx timeout code from Tx path.

  Sources:
  The National Semiconductor LAN Databook, and the 3Com 3c503 databook.

  */

static const char version_8390[] = KERN_INFO \
    "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@scyld.com)\n";

#include <linux/bitops.h>
#include <asm/irq.h>
#include <linux/fcntl.h>
#include <linux/in.h>
#include <linux/interrupt.h>

#include <linux/etherdevice.h>

#define BUG_83C690

/* These are the operational function interfaces to board-specific
   routines.
	void reset_8390(struct net_device *dev)
		Resets the board associated with DEV, including a hardware reset of
		the 8390.  This is only called when there is a transmit timeout, and
		it is always followed by 8390_init().
	void block_output(struct net_device *dev, int count, const unsigned char *buf,
					  int start_page)
		Write the COUNT bytes of BUF to the packet buffer at START_PAGE.  The
		"page" value uses the 8390's 256-byte pages.
	void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
		Read the 4 byte, page aligned 8390 header. *If* there is a
		subsequent read, it will be of the rest of the packet.
	void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
		Read COUNT bytes from the packet buffer into the skb data area. Start 
		reading from RING_OFFSET, the address as the 8390 sees it.  This will always
		follow the read of the 8390 header. 
*/
#define ei_reset_8390 (ei_local->reset_8390)
#define ei_block_output (ei_local->block_output)
#define ei_block_input (ei_local->block_input)
#define ei_get_8390_hdr (ei_local->get_8390_hdr)

/* use 0 for production, 1 for verification, >2 for debug */
#ifndef ei_debug
int ei_debug = 1;
#endif

/* Index to functions. */
static void ei_tx_intr(struct net_device *dev);
static void ei_tx_err(struct net_device *dev);
static void axnet_tx_timeout(struct net_device *dev);
static void ei_receive(struct net_device *dev);
static void ei_rx_overrun(struct net_device *dev);

/* Routines generic to NS8390-based boards. */
static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
								int start_page);
static void set_multicast_list(struct net_device *dev);
static void do_set_multicast_list(struct net_device *dev);

/*
 *	SMP and the 8390 setup.
 *
 *	The 8390 isnt exactly designed to be multithreaded on RX/TX. There is
 *	a page register that controls bank and packet buffer access. We guard
 *	this with ei_local->page_lock. Nobody should assume or set the page other
 *	than zero when the lock is not held. Lock holders must restore page 0
 *	before unlocking. Even pure readers must take the lock to protect in 
 *	page 0.
 *
 *	To make life difficult the chip can also be very slow. We therefore can't
 *	just use spinlocks. For the longer lockups we disable the irq the device
 *	sits on and hold the lock. We must hold the lock because there is a dual
 *	processor case other than interrupts (get stats/set multicast list in
 *	parallel with each other and transmit).
 *
 *	Note: in theory we can just disable the irq on the card _but_ there is
 *	a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
 *	enter lock, take the queued irq. So we waddle instead of flying.
 *
 *	Finally by special arrangement for the purpose of being generally 
 *	annoying the transmit function is called bh atomic. That places
 *	restrictions on the user context callers as disable_irq won't save
 *	them.
 */
 
/**
 * ax_open - Open/initialize the board.
 * @dev: network device to initialize
 *
 * This routine goes all-out, setting everything
 * up anew at each open, even though many of these registers should only
 * need to be set once at boot.
 */
static int ax_open(struct net_device *dev)
{
	unsigned long flags;
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);

#ifdef HAVE_TX_TIMEOUT
	/* The card I/O part of the driver (e.g. 3c503) can hook a Tx timeout
	    wrapper that does e.g. media check & then calls axnet_tx_timeout. */
	if (dev->tx_timeout == NULL)
		 dev->tx_timeout = axnet_tx_timeout;
	if (dev->watchdog_timeo <= 0)
		 dev->watchdog_timeo = TX_TIMEOUT;
#endif

	/*
	 *	Grab the page lock so we own the register set, then call
	 *	the init function.
	 */
      
      	spin_lock_irqsave(&ei_local->page_lock, flags);
	AX88190_init(dev, 1);
	/* Set the flag before we drop the lock, That way the IRQ arrives
	   after its set and we get no silly warnings */
	netif_start_queue(dev);
      	spin_unlock_irqrestore(&ei_local->page_lock, flags);
	ei_local->irqlock = 0;
	return 0;
}

#define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)

/**
 * ax_close - shut down network device
 * @dev: network device to close
 *
 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
 */
static int ax_close(struct net_device *dev)
{
	unsigned long flags;

	/*
	 *      Hold the page lock during close
	 */

	spin_lock_irqsave(&dev_lock(dev), flags);
	AX88190_init(dev, 0);
	spin_unlock_irqrestore(&dev_lock(dev), flags);
	netif_stop_queue(dev);
	return 0;
}

/**
 * axnet_tx_timeout - handle transmit time out condition
 * @dev: network device which has apparently fallen asleep
 *
 * Called by kernel when device never acknowledges a transmit has
 * completed (or failed) - i.e. never posted a Tx related interrupt.
 */

static void axnet_tx_timeout(struct net_device *dev)
{
	long e8390_base = dev->base_addr;
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	int txsr, isr, tickssofar = jiffies - dev->trans_start;
	unsigned long flags;

	dev->stats.tx_errors++;

	spin_lock_irqsave(&ei_local->page_lock, flags);
	txsr = inb(e8390_base+EN0_TSR);
	isr = inb(e8390_base+EN0_ISR);
	spin_unlock_irqrestore(&ei_local->page_lock, flags);

	printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
		dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
		(isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);

	if (!isr && !dev->stats.tx_packets) 
	{
		/* The 8390 probably hasn't gotten on the cable yet. */
		ei_local->interface_num ^= 1;   /* Try a different xcvr.  */
	}

	/* Ugly but a reset can be slow, yet must be protected */
		
	spin_lock_irqsave(&ei_local->page_lock, flags);
		
	/* Try to restart the card.  Perhaps the user has fixed something. */
	ei_reset_8390(dev);
	AX88190_init(dev, 1);
		
	spin_unlock_irqrestore(&ei_local->page_lock, flags);
	netif_wake_queue(dev);
}
    
/**
 * axnet_start_xmit - begin packet transmission
 * @skb: packet to be sent
 * @dev: network device to which packet is sent
 *
 * Sends a packet to an 8390 network device.
 */
 
static int axnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	long e8390_base = dev->base_addr;
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	int length, send_length, output_page;
	unsigned long flags;
	u8 packet[ETH_ZLEN];
	
	netif_stop_queue(dev);

	length = skb->len;

	/* Mask interrupts from the ethercard. 
	   SMP: We have to grab the lock here otherwise the IRQ handler
	   on another CPU can flip window and race the IRQ mask set. We end
	   up trashing the mcast filter not disabling irqs if we don't lock */
	   
	spin_lock_irqsave(&ei_local->page_lock, flags);
	outb_p(0x00, e8390_base + EN0_IMR);
	spin_unlock_irqrestore(&ei_local->page_lock, flags);
	
	/*
	 *	Slow phase with lock held.
	 */
	 
	spin_lock_irqsave(&ei_local->page_lock, flags);
	
	ei_local->irqlock = 1;

	send_length = max(length, ETH_ZLEN);

	/*
	 * We have two Tx slots available for use. Find the first free
	 * slot, and then perform some sanity checks. With two Tx bufs,
	 * you get very close to transmitting back-to-back packets. With
	 * only one Tx buf, the transmitter sits idle while you reload the
	 * card, leaving a substantial gap between each transmitted packet.
	 */

	if (ei_local->tx1 == 0) 
	{
		output_page = ei_local->tx_start_page;
		ei_local->tx1 = send_length;
		if (ei_debug  &&  ei_local->tx2 > 0)
			printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
				dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
	}
	else if (ei_local->tx2 == 0) 
	{
		output_page = ei_local->tx_start_page + TX_PAGES/2;
		ei_local->tx2 = send_length;
		if (ei_debug  &&  ei_local->tx1 > 0)
			printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
				dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
	}
	else
	{	/* We should never get here. */
		if (ei_debug)
			printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n",
				dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
		ei_local->irqlock = 0;
		netif_stop_queue(dev);
		outb_p(ENISR_ALL, e8390_base + EN0_IMR);
		spin_unlock_irqrestore(&ei_local->page_lock, flags);
		dev->stats.tx_errors++;
		return 1;
	}

	/*
	 * Okay, now upload the packet and trigger a send if the transmitter
	 * isn't already sending. If it is busy, the interrupt handler will
	 * trigger the send later, upon receiving a Tx done interrupt.
	 */

	if (length == skb->len)
		ei_block_output(dev, length, skb->data, output_page);
	else {
		memset(packet, 0, ETH_ZLEN);
		skb_copy_from_linear_data(skb, packet, skb->len);
		ei_block_output(dev, length, packet, output_page);
	}
	
	if (! ei_local->txing) 
	{
		ei_local->txing = 1;
		NS8390_trigger_send(dev, send_length, output_page);
		dev->trans_start = jiffies;
		if (output_page == ei_local->tx_start_page) 
		{
			ei_local->tx1 = -1;
			ei_local->lasttx = -1;
		}
		else 
		{
			ei_local->tx2 = -1;
			ei_local->lasttx = -2;
		}
	}
	else ei_local->txqueue++;

	if (ei_local->tx1  &&  ei_local->tx2)
		netif_stop_queue(dev);
	else
		netif_start_queue(dev);

	/* Turn 8390 interrupts back on. */
	ei_local->irqlock = 0;
	outb_p(ENISR_ALL, e8390_base + EN0_IMR);
	
	spin_unlock_irqrestore(&ei_local->page_lock, flags);

	dev_kfree_skb (skb);
	dev->stats.tx_bytes += send_length;
    
	return 0;
}

/**
 * ax_interrupt - handle the interrupts from an 8390
 * @irq: interrupt number
 * @dev_id: a pointer to the net_device
 *
 * Handle the ether interface interrupts. We pull packets from
 * the 8390 via the card specific functions and fire them at the networking
 * stack. We also handle transmit completions and wake the transmit path if
 * necessary. We also update the counters and do other housekeeping as
 * needed.
 */

static irqreturn_t ax_interrupt(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	long e8390_base;
	int interrupts, nr_serviced = 0, i;
	struct ei_device *ei_local;
    	int handled = 0;

	e8390_base = dev->base_addr;
	ei_local = netdev_priv(dev);

	/*
	 *	Protect the irq test too.
	 */
	 
	spin_lock(&ei_local->page_lock);

	if (ei_local->irqlock) 
	{
#if 1 /* This might just be an interrupt for a PCI device sharing this line */
		/* The "irqlock" check is only for testing. */
		printk(ei_local->irqlock
			   ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
			   : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
			   dev->name, inb_p(e8390_base + EN0_ISR),
			   inb_p(e8390_base + EN0_IMR));
#endif
		spin_unlock(&ei_local->page_lock);
		return IRQ_NONE;
	}
    
	if (ei_debug > 3)
		printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name,
			   inb_p(e8390_base + EN0_ISR));

	outb_p(0x00, e8390_base + EN0_ISR);
	ei_local->irqlock = 1;
   
	/* !!Assumption!! -- we stay in page 0.	 Don't break this. */
	while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0
		   && ++nr_serviced < MAX_SERVICE) 
	{
		if (!netif_running(dev) || (interrupts == 0xff)) {
			if (ei_debug > 1)
				printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name);
			outb_p(interrupts, e8390_base + EN0_ISR);
			interrupts = 0;
			break;
		}
		handled = 1;

		/* AX88190 bug fix. */
		outb_p(interrupts, e8390_base + EN0_ISR);
		for (i = 0; i < 10; i++) {
			if (!(inb(e8390_base + EN0_ISR) & interrupts))
				break;
			outb_p(0, e8390_base + EN0_ISR);
			outb_p(interrupts, e8390_base + EN0_ISR);
		}
		if (interrupts & ENISR_OVER) 
			ei_rx_overrun(dev);
		else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) 
		{
			/* Got a good (?) packet. */
			ei_receive(dev);
		}
		/* Push the next to-transmit packet through. */
		if (interrupts & ENISR_TX)
			ei_tx_intr(dev);
		else if (interrupts & ENISR_TX_ERR)
			ei_tx_err(dev);

		if (interrupts & ENISR_COUNTERS) 
		{
			dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
			dev->stats.rx_crc_errors   += inb_p(e8390_base + EN0_COUNTER1);
			dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
		}
	}
    
	if (interrupts && ei_debug > 3) 
	{
		handled = 1;
		if (nr_serviced >= MAX_SERVICE) 
		{
			/* 0xFF is valid for a card removal */
			if(interrupts!=0xFF)
				printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n",
				   dev->name, interrupts);
			outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
		} else {
			printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts);
			outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
		}
	}

	/* Turn 8390 interrupts back on. */
	ei_local->irqlock = 0;
	outb_p(ENISR_ALL, e8390_base + EN0_IMR);

	spin_unlock(&ei_local->page_lock);
	return IRQ_RETVAL(handled);
}

/**
 * ei_tx_err - handle transmitter error
 * @dev: network device which threw the exception
 *
 * A transmitter error has happened. Most likely excess collisions (which
 * is a fairly normal condition). If the error is one where the Tx will
 * have been aborted, we try and send another one right away, instead of
 * letting the failed packet sit and collect dust in the Tx buffer. This
 * is a much better solution as it avoids kernel based Tx timeouts, and
 * an unnecessary card reset.
 *
 * Called with lock held.
 */

static void ei_tx_err(struct net_device *dev)
{
	long e8390_base = dev->base_addr;
	unsigned char txsr = inb_p(e8390_base+EN0_TSR);
	unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);

#ifdef VERBOSE_ERROR_DUMP
	printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
	if (txsr & ENTSR_ABT)
		printk("excess-collisions ");
	if (txsr & ENTSR_ND)
		printk("non-deferral ");
	if (txsr & ENTSR_CRS)
		printk("lost-carrier ");
	if (txsr & ENTSR_FU)
		printk("FIFO-underrun ");
	if (txsr & ENTSR_CDH)
		printk("lost-heartbeat ");
	printk("\n");
#endif

	if (tx_was_aborted)
		ei_tx_intr(dev);
	else 
	{
		dev->stats.tx_errors++;
		if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
		if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
		if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
	}
}

/**
 * ei_tx_intr - transmit interrupt handler
 * @dev: network device for which tx intr is handled
 *
 * We have finished a transmit: check for errors and then trigger the next
 * packet to be sent. Called with lock held.
 */

static void ei_tx_intr(struct net_device *dev)
{
	long e8390_base = dev->base_addr;
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	int status = inb(e8390_base + EN0_TSR);
    
	/*
	 * There are two Tx buffers, see which one finished, and trigger
	 * the send of another one if it exists.
	 */
	ei_local->txqueue--;

	if (ei_local->tx1 < 0) 
	{
		if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
			printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n",
				ei_local->name, ei_local->lasttx, ei_local->tx1);
		ei_local->tx1 = 0;
		if (ei_local->tx2 > 0) 
		{
			ei_local->txing = 1;
			NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
			dev->trans_start = jiffies;
			ei_local->tx2 = -1,
			ei_local->lasttx = 2;
		}
		else ei_local->lasttx = 20, ei_local->txing = 0;	
	}
	else if (ei_local->tx2 < 0) 
	{
		if (ei_local->lasttx != 2  &&  ei_local->lasttx != -2)
			printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
				ei_local->name, ei_local->lasttx, ei_local->tx2);
		ei_local->tx2 = 0;
		if (ei_local->tx1 > 0) 
		{
			ei_local->txing = 1;
			NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
			dev->trans_start = jiffies;
			ei_local->tx1 = -1;
			ei_local->lasttx = 1;
		}
		else
			ei_local->lasttx = 10, ei_local->txing = 0;
	}
//	else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n",
//			dev->name, ei_local->lasttx);

	/* Minimize Tx latency: update the statistics after we restart TXing. */
	if (status & ENTSR_COL)
		dev->stats.collisions++;
	if (status & ENTSR_PTX)
		dev->stats.tx_packets++;
	else 
	{
		dev->stats.tx_errors++;
		if (status & ENTSR_ABT) 
		{
			dev->stats.tx_aborted_errors++;
			dev->stats.collisions += 16;
		}
		if (status & ENTSR_CRS) 
			dev->stats.tx_carrier_errors++;
		if (status & ENTSR_FU) 
			dev->stats.tx_fifo_errors++;
		if (status & ENTSR_CDH)
			dev->stats.tx_heartbeat_errors++;
		if (status & ENTSR_OWC)
			dev->stats.tx_window_errors++;
	}
	netif_wake_queue(dev);
}

/**
 * ei_receive - receive some packets
 * @dev: network device with which receive will be run
 *
 * We have a good packet(s), get it/them out of the buffers. 
 * Called with lock held.
 */

static void ei_receive(struct net_device *dev)
{
	long e8390_base = dev->base_addr;
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	unsigned char rxing_page, this_frame, next_frame;
	unsigned short current_offset;
	int rx_pkt_count = 0;
	struct e8390_pkt_hdr rx_frame;
    
	while (++rx_pkt_count < 10) 
	{
		int pkt_len, pkt_stat;
		
		/* Get the rx page (incoming packet pointer). */
		rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
		
		/* Remove one frame from the ring.  Boundary is always a page behind. */
		this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
		if (this_frame >= ei_local->stop_page)
			this_frame = ei_local->rx_start_page;
		
		/* Someday we'll omit the previous, iff we never get this message.
		   (There is at least one clone claimed to have a problem.)  
		   
		   Keep quiet if it looks like a card removal. One problem here
		   is that some clones crash in roughly the same way.
		 */
		if (ei_debug > 0  &&  this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
			printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n",
				   dev->name, this_frame, ei_local->current_page);
		
		if (this_frame == rxing_page)	/* Read all the frames? */
			break;				/* Done for now */
		
		current_offset = this_frame << 8;
		ei_get_8390_hdr(dev, &rx_frame, this_frame);
		
		pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
		pkt_stat = rx_frame.status;
		
		next_frame = this_frame + 1 + ((pkt_len+4)>>8);
		
		if (pkt_len < 60  ||  pkt_len > 1518) 
		{
			if (ei_debug)
				printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
					   dev->name, rx_frame.count, rx_frame.status,
					   rx_frame.next);
			dev->stats.rx_errors++;
			dev->stats.rx_length_errors++;
		}
		 else if ((pkt_stat & 0x0F) == ENRSR_RXOK) 
		{
			struct sk_buff *skb;
			
			skb = dev_alloc_skb(pkt_len+2);
			if (skb == NULL) 
			{
				if (ei_debug > 1)
					printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n",
						   dev->name, pkt_len);
				dev->stats.rx_dropped++;
				break;
			}
			else
			{
				skb_reserve(skb,2);	/* IP headers on 16 byte boundaries */
				skb_put(skb, pkt_len);	/* Make room */
				ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
				skb->protocol=eth_type_trans(skb,dev);
				netif_rx(skb);
				dev->stats.rx_packets++;
				dev->stats.rx_bytes += pkt_len;
				if (pkt_stat & ENRSR_PHY)
					dev->stats.multicast++;
			}
		} 
		else 
		{
			if (ei_debug)
				printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
					   dev->name, rx_frame.status, rx_frame.next,
					   rx_frame.count);
			dev->stats.rx_errors++;
			/* NB: The NIC counts CRC, frame and missed errors. */
			if (pkt_stat & ENRSR_FO)
				dev->stats.rx_fifo_errors++;
		}
		next_frame = rx_frame.next;
		
		/* This _should_ never happen: it's here for avoiding bad clones. */
		if (next_frame >= ei_local->stop_page) {
			printk("%s: next frame inconsistency, %#2x\n", dev->name,
				   next_frame);
			next_frame = ei_local->rx_start_page;
		}
		ei_local->current_page = next_frame;
		outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
	}

	return;
}

/**
 * ei_rx_overrun - handle receiver overrun
 * @dev: network device which threw exception
 *
 * We have a receiver overrun: we have to kick the 8390 to get it started
 * again. Problem is that you have to kick it exactly as NS prescribes in
 * the updated datasheets, or "the NIC may act in an unpredictable manner."
 * This includes causing "the NIC to defer indefinitely when it is stopped
 * on a busy network."  Ugh.
 * Called with lock held. Don't call this with the interrupts off or your
 * computer will hate you - it takes 10ms or so. 
 */

static void ei_rx_overrun(struct net_device *dev)
{
	axnet_dev_t *info = PRIV(dev);
	long e8390_base = dev->base_addr;
	unsigned char was_txing, must_resend = 0;
    
	/*
	 * Record whether a Tx was in progress and then issue the
	 * stop command.
	 */
	was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
	outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
    
	if (ei_debug > 1)
		printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name);
	dev->stats.rx_over_errors++;
    
	/* 
	 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
	 * Early datasheets said to poll the reset bit, but now they say that
	 * it "is not a reliable indicator and subsequently should be ignored."
	 * We wait at least 10ms.
	 */

	mdelay(10);

	/*
	 * Reset RBCR[01] back to zero as per magic incantation.
	 */
	outb_p(0x00, e8390_base+EN0_RCNTLO);
	outb_p(0x00, e8390_base+EN0_RCNTHI);

	/*
	 * See if any Tx was interrupted or not. According to NS, this
	 * step is vital, and skipping it will cause no end of havoc.
	 */

	if (was_txing)
	{ 
		unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
		if (!tx_completed)
			must_resend = 1;
	}

	/*
	 * Have to enter loopback mode and then restart the NIC before
	 * you are allowed to slurp packets up off the ring.
	 */
	outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
	outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);

	/*
	 * Clear the Rx ring of all the debris, and ack the interrupt.
	 */
	ei_receive(dev);

	/*
	 * Leave loopback mode, and resend any packet that got stopped.
	 */
	outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR); 
	if (must_resend)
    		outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
}

/*
 *	Collect the stats. This is called unlocked and from several contexts.
 */
 
static struct net_device_stats *get_stats(struct net_device *dev)
{
	long ioaddr = dev->base_addr;
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	unsigned long flags;
    
	/* If the card is stopped, just return the present stats. */
	if (!netif_running(dev))
		return &dev->stats;

	spin_lock_irqsave(&ei_local->page_lock,flags);
	/* Read the counter registers, assuming we are in page 0. */
	dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
	dev->stats.rx_crc_errors   += inb_p(ioaddr + EN0_COUNTER1);
	dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
	spin_unlock_irqrestore(&ei_local->page_lock, flags);
    
	return &dev->stats;
}

/*
 * Form the 64 bit 8390 multicast table from the linked list of addresses
 * associated with this dev structure.
 */
 
static inline void make_mc_bits(u8 *bits, struct net_device *dev)
{
	struct dev_mc_list *dmi;
	u32 crc;

	for (dmi=dev->mc_list; dmi; dmi=dmi->next) {
		
		crc = ether_crc(ETH_ALEN, dmi->dmi_addr);
		/* 
		 * The 8390 uses the 6 most significant bits of the
		 * CRC to index the multicast table.
		 */
		bits[crc>>29] |= (1<<((crc>>26)&7));
	}
}

/**
 * do_set_multicast_list - set/clear multicast filter
 * @dev: net device for which multicast filter is adjusted
 *
 *	Set or clear the multicast filter for this adaptor.
 *	Must be called with lock held. 
 */
 
static void do_set_multicast_list(struct net_device *dev)
{
	long e8390_base = dev->base_addr;
	int i;
	struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);

	if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
		memset(ei_local->mcfilter, 0, 8);
		if (dev->mc_list)
			make_mc_bits(ei_local->mcfilter, dev);
	} else {
		/* set to accept-all */
		memset(ei_local->mcfilter, 0xFF, 8);
	}

	outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
	for(i = 0; i < 8; i++) 
	{
		outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
	}
	outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);

  	if(dev->flags&IFF_PROMISC)
  		outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
	else if(dev->flags&IFF_ALLMULTI || dev->mc_list)
  		outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
  	else
  		outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);

	outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
}

/*
 *	Called without lock held. This is invoked from user context and may
 *	be parallel to just about everything else. Its also fairly quick and
 *	not called too often. Must protect against both bh and irq users
 */

static void set_multicast_list(struct net_device *dev)
{
	unsigned long flags;

	spin_lock_irqsave(&dev_lock(dev), flags);
	do_set_multicast_list(dev);
	spin_unlock_irqrestore(&dev_lock(dev), flags);
}	

/**
 * axdev_setup - init rest of 8390 device struct
 * @dev: network device structure to init
 *
 * Initialize the rest of the 8390 device structure.  Do NOT __init
 * this, as it is used by 8390 based modular drivers too.
 */

static void axdev_setup(struct net_device *dev)
{
	struct ei_device *ei_local;
	if (ei_debug > 1)
		printk(version_8390);
    
	ei_local = (struct ei_device *)netdev_priv(dev);
	spin_lock_init(&ei_local->page_lock);
    
	dev->hard_start_xmit = &axnet_start_xmit;
	dev->get_stats	= get_stats;
	dev->set_multicast_list = &set_multicast_list;

	ether_setup(dev);
}

/* This page of functions should be 8390 generic */
/* Follow National Semi's recommendations for initializing the "NIC". */

/**
 * AX88190_init - initialize 8390 hardware
 * @dev: network device to initialize
 * @startp: boolean.  non-zero value to initiate chip processing
 *
 *	Must be called with lock held.
 */

static void AX88190_init(struct net_device *dev, int startp)
{
	axnet_dev_t *info = PRIV(dev);
	long e8390_base = dev->base_addr;
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	int i;
	int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
    
	if(sizeof(struct e8390_pkt_hdr)!=4)
    		panic("8390.c: header struct mispacked\n");    
	/* Follow National Semi's recommendations for initing the DP83902. */
	outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
	outb_p(endcfg, e8390_base + EN0_DCFG);	/* 0x48 or 0x49 */
	/* Clear the remote byte count registers. */
	outb_p(0x00,  e8390_base + EN0_RCNTLO);
	outb_p(0x00,  e8390_base + EN0_RCNTHI);
	/* Set to monitor and loopback mode -- this is vital!. */
	outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
	outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
	/* Set the transmit page and receive ring. */
	outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
	ei_local->tx1 = ei_local->tx2 = 0;
	outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
	outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY);	/* 3c503 says 0x3f,NS0x26*/
	ei_local->current_page = ei_local->rx_start_page;		/* assert boundary+1 */
	outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
	/* Clear the pending interrupts and mask. */
	outb_p(0xFF, e8390_base + EN0_ISR);
	outb_p(0x00,  e8390_base + EN0_IMR);
    
	/* Copy the station address into the DS8390 registers. */

	outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
	for(i = 0; i < 6; i++) 
	{
		outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
		if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
			printk(KERN_ERR "Hw. address read/write mismap %d\n",i);
	}

	outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
	outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);

	netif_start_queue(dev);
	ei_local->tx1 = ei_local->tx2 = 0;
	ei_local->txing = 0;

	if (startp) 
	{
		outb_p(0xff,  e8390_base + EN0_ISR);
		outb_p(ENISR_ALL,  e8390_base + EN0_IMR);
		outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
		outb_p(E8390_TXCONFIG | info->duplex_flag,
		       e8390_base + EN0_TXCR); /* xmit on. */
		/* 3c503 TechMan says rxconfig only after the NIC is started. */
		outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
		do_set_multicast_list(dev);	/* (re)load the mcast table */
	}
}

/* Trigger a transmit start, assuming the length is valid. 
   Always called with the page lock held */
   
static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
								int start_page)
{
	long e8390_base = dev->base_addr;
 	struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev);
    
	if (inb_p(e8390_base) & E8390_TRANS) 
	{
		printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n",
			dev->name);
		return;
	}
	outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
	outb_p(length >> 8, e8390_base + EN0_TCNTHI);
	outb_p(start_page, e8390_base + EN0_TPSR);
	outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
}