aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/dm9000.c
blob: ee597e676ee500235f7dace13c570ad92e20724f (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
/*
 *      Davicom DM9000 Fast Ethernet driver for Linux.
 * 	Copyright (C) 1997  Sten Wang
 *
 * 	This program is free software; you can redistribute it and/or
 * 	modify it under the terms of the GNU General Public License
 * 	as published by the Free Software Foundation; either version 2
 * 	of the License, or (at your option) any later version.
 *
 * 	This program is distributed in the hope that it will be useful,
 * 	but WITHOUT ANY WARRANTY; without even the implied warranty of
 * 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * 	GNU General Public License for more details.
 *
 * (C) Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
 *
 * Additional updates, Copyright:
 *	Ben Dooks <ben@simtec.co.uk>
 *	Sascha Hauer <s.hauer@pengutronix.de>
 */

#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/crc32.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/dm9000.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/slab.h>

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

#include "dm9000.h"

/* Board/System/Debug information/definition ---------------- */

#define DM9000_PHY		0x40	/* PHY address 0x01 */

#define CARDNAME	"dm9000"
#define DRV_VERSION	"1.31"

/*
 * Transmit timeout, default 5 seconds.
 */
static int watchdog = 5000;
module_param(watchdog, int, 0400);
MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");

/* DM9000 register address locking.
 *
 * The DM9000 uses an address register to control where data written
 * to the data register goes. This means that the address register
 * must be preserved over interrupts or similar calls.
 *
 * During interrupt and other critical calls, a spinlock is used to
 * protect the system, but the calls themselves save the address
 * in the address register in case they are interrupting another
 * access to the device.
 *
 * For general accesses a lock is provided so that calls which are
 * allowed to sleep are serialised so that the address register does
 * not need to be saved. This lock also serves to serialise access
 * to the EEPROM and PHY access registers which are shared between
 * these two devices.
 */

/* The driver supports the original DM9000E, and now the two newer
 * devices, DM9000A and DM9000B.
 */

enum dm9000_type {
	TYPE_DM9000E,	/* original DM9000 */
	TYPE_DM9000A,
	TYPE_DM9000B
};

/* Structure/enum declaration ------------------------------- */
typedef struct board_info {

	void __iomem	*io_addr;	/* Register I/O base address */
	void __iomem	*io_data;	/* Data I/O address */
	u16		 irq;		/* IRQ */

	u16		tx_pkt_cnt;
	u16		queue_pkt_len;
	u16		queue_start_addr;
	u16		queue_ip_summed;
	u16		dbug_cnt;
	u8		io_mode;		/* 0:word, 2:byte */
	u8		phy_addr;
	u8		imr_all;

	unsigned int	flags;
	unsigned int	in_suspend :1;
	unsigned int	wake_supported :1;
	int		debug_level;

	enum dm9000_type type;

	void (*inblk)(void __iomem *port, void *data, int length);
	void (*outblk)(void __iomem *port, void *data, int length);
	void (*dumpblk)(void __iomem *port, int length);

	struct device	*dev;	     /* parent device */

	struct resource	*addr_res;   /* resources found */
	struct resource *data_res;
	struct resource	*addr_req;   /* resources requested */
	struct resource *data_req;
	struct resource *irq_res;

	int		 irq_wake;

	struct mutex	 addr_lock;	/* phy and eeprom access lock */

	struct delayed_work phy_poll;
	struct net_device  *ndev;

	spinlock_t	lock;

	struct mii_if_info mii;
	u32		msg_enable;
	u32		wake_state;

	int		ip_summed;
} board_info_t;

/* debug code */

#define dm9000_dbg(db, lev, msg...) do {		\
	if ((lev) < CONFIG_DM9000_DEBUGLEVEL &&		\
	    (lev) < db->debug_level) {			\
		dev_dbg(db->dev, msg);			\
	}						\
} while (0)

static inline board_info_t *to_dm9000_board(struct net_device *dev)
{
	return netdev_priv(dev);
}

/* DM9000 network board routine ---------------------------- */

static void
dm9000_reset(board_info_t * db)
{
	dev_dbg(db->dev, "resetting device\n");

	/* RESET device */
	writeb(DM9000_NCR, db->io_addr);
	udelay(200);
	writeb(NCR_RST, db->io_data);
	udelay(200);
}

/*
 *   Read a byte from I/O port
 */
static u8
ior(board_info_t * db, int reg)
{
	writeb(reg, db->io_addr);
	return readb(db->io_data);
}

/*
 *   Write a byte to I/O port
 */

static void
iow(board_info_t * db, int reg, int value)
{
	writeb(reg, db->io_addr);
	writeb(value, db->io_data);
}

/* routines for sending block to chip */

static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
{
	writesb(reg, data, count);
}

static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
{
	writesw(reg, data, (count+1) >> 1);
}

static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
{
	writesl(reg, data, (count+3) >> 2);
}

/* input block from chip to memory */

static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
{
	readsb(reg, data, count);
}


static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
{
	readsw(reg, data, (count+1) >> 1);
}

static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
{
	readsl(reg, data, (count+3) >> 2);
}

/* dump block from chip to null */

static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
{
	int i;
	int tmp;

	for (i = 0; i < count; i++)
		tmp = readb(reg);
}

static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
{
	int i;
	int tmp;

	count = (count + 1) >> 1;

	for (i = 0; i < count; i++)
		tmp = readw(reg);
}

static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
{
	int i;
	int tmp;

	count = (count + 3) >> 2;

	for (i = 0; i < count; i++)
		tmp = readl(reg);
}

/* dm9000_set_io
 *
 * select the specified set of io routines to use with the
 * device
 */

static void dm9000_set_io(struct board_info *db, int byte_width)
{
	/* use the size of the data resource to work out what IO
	 * routines we want to use
	 */

	switch (byte_width) {
	case 1:
		db->dumpblk = dm9000_dumpblk_8bit;
		db->outblk  = dm9000_outblk_8bit;
		db->inblk   = dm9000_inblk_8bit;
		break;


	case 3:
		dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n");
	case 2:
		db->dumpblk = dm9000_dumpblk_16bit;
		db->outblk  = dm9000_outblk_16bit;
		db->inblk   = dm9000_inblk_16bit;
		break;

	case 4:
	default:
		db->dumpblk = dm9000_dumpblk_32bit;
		db->outblk  = dm9000_outblk_32bit;
		db->inblk   = dm9000_inblk_32bit;
		break;
	}
}

static void dm9000_schedule_poll(board_info_t *db)
{
	if (db->type == TYPE_DM9000E)
		schedule_delayed_work(&db->phy_poll, HZ * 2);
}

static int dm9000_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
{
	board_info_t *dm = to_dm9000_board(dev);

	if (!netif_running(dev))
		return -EINVAL;

	return generic_mii_ioctl(&dm->mii, if_mii(req), cmd, NULL);
}

static unsigned int
dm9000_read_locked(board_info_t *db, int reg)
{
	unsigned long flags;
	unsigned int ret;

	spin_lock_irqsave(&db->lock, flags);
	ret = ior(db, reg);
	spin_unlock_irqrestore(&db->lock, flags);

	return ret;
}

static int dm9000_wait_eeprom(board_info_t *db)
{
	unsigned int status;
	int timeout = 8;	/* wait max 8msec */

	/* The DM9000 data sheets say we should be able to
	 * poll the ERRE bit in EPCR to wait for the EEPROM
	 * operation. From testing several chips, this bit
	 * does not seem to work.
	 *
	 * We attempt to use the bit, but fall back to the
	 * timeout (which is why we do not return an error
	 * on expiry) to say that the EEPROM operation has
	 * completed.
	 */

	while (1) {
		status = dm9000_read_locked(db, DM9000_EPCR);

		if ((status & EPCR_ERRE) == 0)
			break;

		msleep(1);

		if (timeout-- < 0) {
			dev_dbg(db->dev, "timeout waiting EEPROM\n");
			break;
		}
	}

	return 0;
}

/*
 *  Read a word data from EEPROM
 */
static void
dm9000_read_eeprom(board_info_t *db, int offset, u8 *to)
{
	unsigned long flags;

	if (db->flags & DM9000_PLATF_NO_EEPROM) {
		to[0] = 0xff;
		to[1] = 0xff;
		return;
	}

	mutex_lock(&db->addr_lock);

	spin_lock_irqsave(&db->lock, flags);

	iow(db, DM9000_EPAR, offset);
	iow(db, DM9000_EPCR, EPCR_ERPRR);

	spin_unlock_irqrestore(&db->lock, flags);

	dm9000_wait_eeprom(db);

	/* delay for at-least 150uS */
	msleep(1);

	spin_lock_irqsave(&db->lock, flags);

	iow(db, DM9000_EPCR, 0x0);

	to[0] = ior(db, DM9000_EPDRL);
	to[1] = ior(db, DM9000_EPDRH);

	spin_unlock_irqrestore(&db->lock, flags);

	mutex_unlock(&db->addr_lock);
}

/*
 * Write a word data to SROM
 */
static void
dm9000_write_eeprom(board_info_t *db, int offset, u8 *data)
{
	unsigned long flags;

	if (db->flags & DM9000_PLATF_NO_EEPROM)
		return;

	mutex_lock(&db->addr_lock);

	spin_lock_irqsave(&db->lock, flags);
	iow(db, DM9000_EPAR, offset);
	iow(db, DM9000_EPDRH, data[1]);
	iow(db, DM9000_EPDRL, data[0]);
	iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
	spin_unlock_irqrestore(&db->lock, flags);

	dm9000_wait_eeprom(db);

	mdelay(1);	/* wait at least 150uS to clear */

	spin_lock_irqsave(&db->lock, flags);
	iow(db, DM9000_EPCR, 0);
	spin_unlock_irqrestore(&db->lock, flags);

	mutex_unlock(&db->addr_lock);
}

/* ethtool ops */

static void dm9000_get_drvinfo(struct net_device *dev,
			       struct ethtool_drvinfo *info)
{
	board_info_t *dm = to_dm9000_board(dev);

	strcpy(info->driver, CARDNAME);
	strcpy(info->version, DRV_VERSION);
	strcpy(info->bus_info, to_platform_device(dm->dev)->name);
}

static u32 dm9000_get_msglevel(struct net_device *dev)
{
	board_info_t *dm = to_dm9000_board(dev);

	return dm->msg_enable;
}

static void dm9000_set_msglevel(struct net_device *dev, u32 value)
{
	board_info_t *dm = to_dm9000_board(dev);

	dm->msg_enable = value;
}

static int dm9000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	board_info_t *dm = to_dm9000_board(dev);

	mii_ethtool_gset(&dm->mii, cmd);
	return 0;
}

static int dm9000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	board_info_t *dm = to_dm9000_board(dev);

	return mii_ethtool_sset(&dm->mii, cmd);
}

static int dm9000_nway_reset(struct net_device *dev)
{
	board_info_t *dm = to_dm9000_board(dev);
	return mii_nway_restart(&dm->mii);
}

static int dm9000_set_features(struct net_device *dev, u32 features)
{
	board_info_t *dm = to_dm9000_board(dev);
	u32 changed = dev->features ^ features;
	unsigned long flags;

	if (!(changed & NETIF_F_RXCSUM))
		return 0;

	spin_lock_irqsave(&dm->lock, flags);
	iow(dm, DM9000_RCSR, (features & NETIF_F_RXCSUM) ? RCSR_CSUM : 0);
	spin_unlock_irqrestore(&dm->lock, flags);

	return 0;
}

static u32 dm9000_get_link(struct net_device *dev)
{
	board_info_t *dm = to_dm9000_board(dev);
	u32 ret;

	if (dm->flags & DM9000_PLATF_EXT_PHY)
		ret = mii_link_ok(&dm->mii);
	else
		ret = dm9000_read_locked(dm, DM9000_NSR) & NSR_LINKST ? 1 : 0;

	return ret;
}

#define DM_EEPROM_MAGIC		(0x444D394B)

static int dm9000_get_eeprom_len(struct net_device *dev)
{
	return 128;
}

static int dm9000_get_eeprom(struct net_device *dev,
			     struct ethtool_eeprom *ee, u8 *data)
{
	board_info_t *dm = to_dm9000_board(dev);
	int offset = ee->offset;
	int len = ee->len;
	int i;

	/* EEPROM access is aligned to two bytes */

	if ((len & 1) != 0 || (offset & 1) != 0)
		return -EINVAL;

	if (dm->flags & DM9000_PLATF_NO_EEPROM)
		return -ENOENT;

	ee->magic = DM_EEPROM_MAGIC;

	for (i = 0; i < len; i += 2)
		dm9000_read_eeprom(dm, (offset + i) / 2, data + i);

	return 0;
}

static int dm9000_set_eeprom(struct net_device *dev,
			     struct ethtool_eeprom *ee, u8 *data)
{
	board_info_t *dm = to_dm9000_board(dev);
	int offset = ee->offset;
	int len = ee->len;
	int i;

	/* EEPROM access is aligned to two bytes */

	if ((len & 1) != 0 || (offset & 1) != 0)
		return -EINVAL;

	if (dm->flags & DM9000_PLATF_NO_EEPROM)
		return -ENOENT;

	if (ee->magic != DM_EEPROM_MAGIC)
		return -EINVAL;

	for (i = 0; i < len; i += 2)
		dm9000_write_eeprom(dm, (offset + i) / 2, data + i);

	return 0;
}

static void dm9000_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
{
	board_info_t *dm = to_dm9000_board(dev);

	memset(w, 0, sizeof(struct ethtool_wolinfo));

	/* note, we could probably support wake-phy too */
	w->supported = dm->wake_supported ? WAKE_MAGIC : 0;
	w->wolopts = dm->wake_state;
}

static int dm9000_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
{
	board_info_t *dm = to_dm9000_board(dev);
	unsigned long flags;
	u32 opts = w->wolopts;
	u32 wcr = 0;

	if (!dm->wake_supported)
		return -EOPNOTSUPP;

	if (opts & ~WAKE_MAGIC)
		return -EINVAL;

	if (opts & WAKE_MAGIC)
		wcr |= WCR_MAGICEN;

	mutex_lock(&dm->addr_lock);

	spin_lock_irqsave(&dm->lock, flags);
	iow(dm, DM9000_WCR, wcr);
	spin_unlock_irqrestore(&dm->lock, flags);

	mutex_unlock(&dm->addr_lock);

	if (dm->wake_state != opts) {
		/* change in wol state, update IRQ state */

		if (!dm->wake_state)
			irq_set_irq_wake(dm->irq_wake, 1);
		else if (dm->wake_state & !opts)
			irq_set_irq_wake(dm->irq_wake, 0);
	}

	dm->wake_state = opts;
	return 0;
}

static const struct ethtool_ops dm9000_ethtool_ops = {
	.get_drvinfo		= dm9000_get_drvinfo,
	.get_settings		= dm9000_get_settings,
	.set_settings		= dm9000_set_settings,
	.get_msglevel		= dm9000_get_msglevel,
	.set_msglevel		= dm9000_set_msglevel,
	.nway_reset		= dm9000_nway_reset,
	.get_link		= dm9000_get_link,
	.get_wol		= dm9000_get_wol,
	.set_wol		= dm9000_set_wol,
 	.get_eeprom_len		= dm9000_get_eeprom_len,
 	.get_eeprom		= dm9000_get_eeprom,
 	.set_eeprom		= dm9000_set_eeprom,
};

static void dm9000_show_carrier(board_info_t *db,
				unsigned carrier, unsigned nsr)
{
	struct net_device *ndev = db->ndev;
	unsigned ncr = dm9000_read_locked(db, DM9000_NCR);

	if (carrier)
		dev_info(db->dev, "%s: link up, %dMbps, %s-duplex, no LPA\n",
			 ndev->name, (nsr & NSR_SPEED) ? 10 : 100,
			 (ncr & NCR_FDX) ? "full" : "half");
	else
		dev_info(db->dev, "%s: link down\n", ndev->name);
}

static void
dm9000_poll_work(struct work_struct *w)
{
	struct delayed_work *dw = to_delayed_work(w);
	board_info_t *db = container_of(dw, board_info_t, phy_poll);
	struct net_device *ndev = db->ndev;

	if (db->flags & DM9000_PLATF_SIMPLE_PHY &&
	    !(db->flags & DM9000_PLATF_EXT_PHY)) {
		unsigned nsr = dm9000_read_locked(db, DM9000_NSR);
		unsigned old_carrier = netif_carrier_ok(ndev) ? 1 : 0;
		unsigned new_carrier;

		new_carrier = (nsr & NSR_LINKST) ? 1 : 0;

		if (old_carrier != new_carrier) {
			if (netif_msg_link(db))
				dm9000_show_carrier(db, new_carrier, nsr);

			if (!new_carrier)
				netif_carrier_off(ndev);
			else
				netif_carrier_on(ndev);
		}
	} else
		mii_check_media(&db->mii, netif_msg_link(db), 0);
	
	if (netif_running(ndev))
		dm9000_schedule_poll(db);
}

/* dm9000_release_board
 *
 * release a board, and any mapped resources
 */

static void
dm9000_release_board(struct platform_device *pdev, struct board_info *db)
{
	/* unmap our resources */

	iounmap(db->io_addr);
	iounmap(db->io_data);

	/* release the resources */

	release_resource(db->data_req);
	kfree(db->data_req);

	release_resource(db->addr_req);
	kfree(db->addr_req);
}

static unsigned char dm9000_type_to_char(enum dm9000_type type)
{
	switch (type) {
	case TYPE_DM9000E: return 'e';
	case TYPE_DM9000A: return 'a';
	case TYPE_DM9000B: return 'b';
	}

	return '?';
}

/*
 *  Set DM9000 multicast address
 */
static void
dm9000_hash_table_unlocked(struct net_device *dev)
{
	board_info_t *db = netdev_priv(dev);
	struct netdev_hw_addr *ha;
	int i, oft;
	u32 hash_val;
	u16 hash_table[4];
	u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;

	dm9000_dbg(db, 1, "entering %s\n", __func__);

	for (i = 0, oft = DM9000_PAR; i < 6; i++, oft++)
		iow(db, oft, dev->dev_addr[i]);

	/* Clear Hash Table */
	for (i = 0; i < 4; i++)
		hash_table[i] = 0x0;

	/* broadcast address */
	hash_table[3] = 0x8000;

	if (dev->flags & IFF_PROMISC)
		rcr |= RCR_PRMSC;

	if (dev->flags & IFF_ALLMULTI)
		rcr |= RCR_ALL;

	/* the multicast address in Hash Table : 64 bits */
	netdev_for_each_mc_addr(ha, dev) {
		hash_val = ether_crc_le(6, ha->addr) & 0x3f;
		hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
	}

	/* Write the hash table to MAC MD table */
	for (i = 0, oft = DM9000_MAR; i < 4; i++) {
		iow(db, oft++, hash_table[i]);
		iow(db, oft++, hash_table[i] >> 8);
	}

	iow(db, DM9000_RCR, rcr);
}

static void
dm9000_hash_table(struct net_device *dev)
{
	board_info_t *db = netdev_priv(dev);
	unsigned long flags;

	spin_lock_irqsave(&db->lock, flags);
	dm9000_hash_table_unlocked(dev);
	spin_unlock_irqrestore(&db->lock, flags);
}

/*
 * Initialize dm9000 board
 */
static void
dm9000_init_dm9000(struct net_device *dev)
{
	board_info_t *db = netdev_priv(dev);
	unsigned int imr;
	unsigned int ncr;

	dm9000_dbg(db, 1, "entering %s\n", __func__);

	/* I/O mode */
	db->io_mode = ior(db, DM9000_ISR) >> 6;	/* ISR bit7:6 keeps I/O mode */

	/* Checksum mode */
	if (dev->hw_features & NETIF_F_RXCSUM)
		iow(db, DM9000_RCSR,
			(dev->features & NETIF_F_RXCSUM) ? RCSR_CSUM : 0);

	iow(db, DM9000_GPCR, GPCR_GEP_CNTL);	/* Let GPIO0 output */

	ncr = (db->flags & DM9000_PLATF_EXT_PHY) ? NCR_EXT_PHY : 0;

	/* if wol is needed, then always set NCR_WAKEEN otherwise we end
	 * up dumping the wake events if we disable this. There is already
	 * a wake-mask in DM9000_WCR */
	if (db->wake_supported)
		ncr |= NCR_WAKEEN;

	iow(db, DM9000_NCR, ncr);

	/* Program operating register */
	iow(db, DM9000_TCR, 0);	        /* TX Polling clear */
	iow(db, DM9000_BPTR, 0x3f);	/* Less 3Kb, 200us */
	iow(db, DM9000_FCR, 0xff);	/* Flow Control */
	iow(db, DM9000_SMCR, 0);        /* Special Mode */
	/* clear TX status */
	iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
	iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */

	/* Set address filter table */
	dm9000_hash_table_unlocked(dev);

	imr = IMR_PAR | IMR_PTM | IMR_PRM;
	if (db->type != TYPE_DM9000E)
		imr |= IMR_LNKCHNG;

	db->imr_all = imr;

	/* Enable TX/RX interrupt mask */
	iow(db, DM9000_IMR, imr);

	/* Init Driver variable */
	db->tx_pkt_cnt = 0;
	db->queue_pkt_len = 0;
	dev->trans_start = jiffies;
}

/* Our watchdog timed out. Called by the networking layer */
static void dm9000_timeout(struct net_device *dev)
{
	board_info_t *db = netdev_priv(dev);
	u8 reg_save;
	unsigned long flags;

	/* Save previous register address */
	spin_lock_irqsave(&db->lock, flags);
	reg_save = readb(db->io_addr);

	netif_stop_queue(dev);
	dm9000_reset(db);
	dm9000_init_dm9000(dev);
	/* We can accept TX packets again */
	dev->trans_start = jiffies; /* prevent tx timeout */
	netif_wake_queue(dev);

	/* Restore previous register address */
	writeb(reg_save, db->io_addr);
	spin_unlock_irqrestore(&db->lock, flags);
}

static void dm9000_send_packet(struct net_device *dev,
			       int ip_summed,
			       u16 pkt_len)
{
	board_info_t *dm = to_dm9000_board(dev);

	/* The DM9000 is not smart enough to leave fragmented packets alone. */
	if (dm->ip_summed != ip_summed) {
		if (ip_summed == CHECKSUM_NONE)
			iow(dm, DM9000_TCCR, 0);
		else
			iow(dm, DM9000_TCCR, TCCR_IP | TCCR_UDP | TCCR_TCP);
		dm->ip_summed = ip_summed;
	}

	/* Set TX length to DM9000 */
	iow(dm, DM9000_TXPLL, pkt_len);
	iow(dm, DM9000_TXPLH, pkt_len >> 8);

	/* Issue TX polling command */
	iow(dm, DM9000_TCR, TCR_TXREQ);	/* Cleared after TX complete */
}

/*
 *  Hardware start transmission.
 *  Send a packet to media from the upper layer.
 */
static int
dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	unsigned long flags;
	board_info_t *db = netdev_priv(dev);

	dm9000_dbg(db, 3, "%s:\n", __func__);

	if (db->tx_pkt_cnt > 1)
		return NETDEV_TX_BUSY;

	spin_lock_irqsave(&db->lock, flags);

	/* Move data to DM9000 TX RAM */
	writeb(DM9000_MWCMD, db->io_addr);

	(db->outblk)(db->io_data, skb->data, skb->len);
	dev->stats.tx_bytes += skb->len;

	db->tx_pkt_cnt++;
	/* TX control: First packet immediately send, second packet queue */
	if (db->tx_pkt_cnt == 1) {
		dm9000_send_packet(dev, skb->ip_summed, skb->len);
	} else {
		/* Second packet */
		db->queue_pkt_len = skb->len;
		db->queue_ip_summed = skb->ip_summed;
		netif_stop_queue(dev);
	}

	spin_unlock_irqrestore(&db->lock, flags);

	/* free this SKB */
	dev_kfree_skb(skb);

	return NETDEV_TX_OK;
}

/*
 * DM9000 interrupt handler
 * receive the packet to upper layer, free the transmitted packet
 */

static void dm9000_tx_done(struct net_device *dev, board_info_t *db)
{
	int tx_status = ior(db, DM9000_NSR);	/* Got TX status */

	if (tx_status & (NSR_TX2END | NSR_TX1END)) {
		/* One packet sent complete */
		db->tx_pkt_cnt--;
		dev->stats.tx_packets++;

		if (netif_msg_tx_done(db))
			dev_dbg(db->dev, "tx done, NSR %02x\n", tx_status);

		/* Queue packet check & send */
		if (db->tx_pkt_cnt > 0)
			dm9000_send_packet(dev, db->queue_ip_summed,
					   db->queue_pkt_len);
		netif_wake_queue(dev);
	}
}

struct dm9000_rxhdr {
	u8	RxPktReady;
	u8	RxStatus;
	__le16	RxLen;
} __packed;

/*
 *  Received a packet and pass to upper layer
 */
static void
dm9000_rx(struct net_device *dev)
{
	board_info_t *db = netdev_priv(dev);
	struct dm9000_rxhdr rxhdr;
	struct sk_buff *skb;
	u8 rxbyte, *rdptr;
	bool GoodPacket;
	int RxLen;

	/* Check packet ready or not */
	do {
		ior(db, DM9000_MRCMDX);	/* Dummy read */

		/* Get most updated data */
		rxbyte = readb(db->io_data);

		/* Status check: this byte must be 0 or 1 */
		if (rxbyte & DM9000_PKT_ERR) {
			dev_warn(db->dev, "status check fail: %d\n", rxbyte);
			iow(db, DM9000_RCR, 0x00);	/* Stop Device */
			iow(db, DM9000_ISR, IMR_PAR);	/* Stop INT request */
			return;
		}

		if (!(rxbyte & DM9000_PKT_RDY))
			return;

		/* A packet ready now  & Get status/length */
		GoodPacket = true;
		writeb(DM9000_MRCMD, db->io_addr);

		(db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));

		RxLen = le16_to_cpu(rxhdr.RxLen);

		if (netif_msg_rx_status(db))
			dev_dbg(db->dev, "RX: status %02x, length %04x\n",
				rxhdr.RxStatus, RxLen);

		/* Packet Status check */
		if (RxLen < 0x40) {
			GoodPacket = false;
			if (netif_msg_rx_err(db))
				dev_dbg(db->dev, "RX: Bad Packet (runt)\n");
		}

		if (RxLen > DM9000_PKT_MAX) {
			dev_dbg(db->dev, "RST: RX Len:%x\n", RxLen);
		}

		/* rxhdr.RxStatus is identical to RSR register. */
		if (rxhdr.RxStatus & (RSR_FOE | RSR_CE | RSR_AE |
				      RSR_PLE | RSR_RWTO |
				      RSR_LCS | RSR_RF)) {
			GoodPacket = false;
			if (rxhdr.RxStatus & RSR_FOE) {
				if (netif_msg_rx_err(db))
					dev_dbg(db->dev, "fifo error\n");
				dev->stats.rx_fifo_errors++;
			}
			if (rxhdr.RxStatus & RSR_CE) {
				if (netif_msg_rx_err(db))
					dev_dbg(db->dev, "crc error\n");
				dev->stats.rx_crc_errors++;
			}
			if (rxhdr.RxStatus & RSR_RF) {
				if (netif_msg_rx_err(db))
					dev_dbg(db->dev, "length error\n");
				dev->stats.rx_length_errors++;
			}
		}

		/* Move data from DM9000 */
		if (GoodPacket &&
		    ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
			skb_reserve(skb, 2);
			rdptr = (u8 *) skb_put(skb, RxLen - 4);

			/* Read received packet from RX SRAM */

			(db->inblk)(db->io_data, rdptr, RxLen);
			dev->stats.rx_bytes += RxLen;

			/* Pass to upper layer */
			skb->protocol = eth_type_trans(skb, dev);
			if (dev->features & NETIF_F_RXCSUM) {
				if ((((rxbyte & 0x1c) << 3) & rxbyte) == 0)
					skb->ip_summed = CHECKSUM_UNNECESSARY;
				else
					skb_checksum_none_assert(skb);
			}
			netif_rx(skb);
			dev->stats.rx_packets++;

		} else {
			/* need to dump the packet's data */

			(db->dumpblk)(db->io_data, RxLen);
		}
	} while (rxbyte & DM9000_PKT_RDY);
}

static irqreturn_t dm9000_interrupt(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	board_info_t *db = netdev_priv(dev);
	int int_status;
	unsigned long flags;
	u8 reg_save;

	dm9000_dbg(db, 3, "entering %s\n", __func__);

	/* A real interrupt coming */

	/* holders of db->lock must always block IRQs */
	spin_lock_irqsave(&db->lock, flags);

	/* Save previous register address */
	reg_save = readb(db->io_addr);

	/* Disable all interrupts */
	iow(db, DM9000_IMR, IMR_PAR);

	/* Got DM9000 interrupt status */
	int_status = ior(db, DM9000_ISR);	/* Got ISR */
	iow(db, DM9000_ISR, int_status);	/* Clear ISR status */

	if (netif_msg_intr(db))
		dev_dbg(db->dev, "interrupt status %02x\n", int_status);

	/* Received the coming packet */
	if (int_status & ISR_PRS)
		dm9000_rx(dev);

	/* Trnasmit Interrupt check */
	if (int_status & ISR_PTS)
		dm9000_tx_done(dev, db);

	if (db->type != TYPE_DM9000E) {
		if (int_status & ISR_LNKCHNG) {
			/* fire a link-change request */
			schedule_delayed_work(&db->phy_poll, 1);
		}
	}

	/* Re-enable interrupt mask */
	iow(db, DM9000_IMR, db->imr_all);

	/* Restore previous register address */
	writeb(reg_save, db->io_addr);

	spin_unlock_irqrestore(&db->lock, flags);

	return IRQ_HANDLED;
}

static irqreturn_t dm9000_wol_interrupt(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	board_info_t *db = netdev_priv(dev);
	unsigned long flags;
	unsigned nsr, wcr;

	spin_lock_irqsave(&db->lock, flags);

	nsr = ior(db, DM9000_NSR);
	wcr = ior(db, DM9000_WCR);

	dev_dbg(db->dev, "%s: NSR=0x%02x, WCR=0x%02x\n", __func__, nsr, wcr);

	if (nsr & NSR_WAKEST) {
		/* clear, so we can avoid */
		iow(db, DM9000_NSR, NSR_WAKEST);

		if (wcr & WCR_LINKST)
			dev_info(db->dev, "wake by link status change\n");
		if (wcr & WCR_SAMPLEST)
			dev_info(db->dev, "wake by sample packet\n");
		if (wcr & WCR_MAGICST )
			dev_info(db->dev, "wake by magic packet\n");
		if (!(wcr & (WCR_LINKST | WCR_SAMPLEST | WCR_MAGICST)))
			dev_err(db->dev, "wake signalled with no reason? "
				"NSR=0x%02x, WSR=0x%02x\n", nsr, wcr);

	}

	spin_unlock_irqrestore(&db->lock, flags);

	return (nsr & NSR_WAKEST) ? IRQ_HANDLED : IRQ_NONE;
}

#ifdef CONFIG_NET_POLL_CONTROLLER
/*
 *Used by netconsole
 */
static void dm9000_poll_controller(struct net_device *dev)
{
	disable_irq(dev->irq);
	dm9000_interrupt(dev->irq, dev);
	enable_irq(dev->irq);
}
#endif

/*
 *  Open the interface.
 *  The interface is opened whenever "ifconfig" actives it.
 */
static int
dm9000_open(struct net_device *dev)
{
	board_info_t *db = netdev_priv(dev);
	unsigned long irqflags = db->irq_res->flags & IRQF_TRIGGER_MASK;

	if (netif_msg_ifup(db))
		dev_dbg(db->dev, "enabling %s\n", dev->name);

	/* If there is no IRQ type specified, default to something that
	 * may work, and tell the user that this is a problem */

	if (irqflags == IRQF_TRIGGER_NONE)
		dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n");

	irqflags |= IRQF_SHARED;

	/* GPIO0 on pre-activate PHY, Reg 1F is not set by reset */
	iow(db, DM9000_GPR, 0);	/* REG_1F bit0 activate phyxcer */
	mdelay(1); /* delay needs by DM9000B */

	/* Initialize DM9000 board */
	dm9000_reset(db);
	dm9000_init_dm9000(dev);

	if (request_irq(dev->irq, dm9000_interrupt, irqflags, dev->name, dev))
		return -EAGAIN;

	/* Init driver variable */
	db->dbug_cnt = 0;

	mii_check_media(&db->mii, netif_msg_link(db), 1);
	netif_start_queue(dev);
	
	dm9000_schedule_poll(db);

	return 0;
}

/*
 * Sleep, either by using msleep() or if we are suspending, then
 * use mdelay() to sleep.
 */
static void dm9000_msleep(board_info_t *db, unsigned int ms)
{
	if (db->in_suspend)
		mdelay(ms);
	else
		msleep(ms);
}

/*
 *   Read a word from phyxcer
 */
static int
dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
{
	board_info_t *db = netdev_priv(dev);
	unsigned long flags;
	unsigned int reg_save;
	int ret;

	mutex_lock(&db->addr_lock);

	spin_lock_irqsave(&db->lock,flags);

	/* Save previous register address */
	reg_save = readb(db->io_addr);

	/* Fill the phyxcer register into REG_0C */
	iow(db, DM9000_EPAR, DM9000_PHY | reg);

	iow(db, DM9000_EPCR, EPCR_ERPRR | EPCR_EPOS);	/* Issue phyxcer read command */

	writeb(reg_save, db->io_addr);
	spin_unlock_irqrestore(&db->lock,flags);

	dm9000_msleep(db, 1);		/* Wait read complete */

	spin_lock_irqsave(&db->lock,flags);
	reg_save = readb(db->io_addr);

	iow(db, DM9000_EPCR, 0x0);	/* Clear phyxcer read command */

	/* The read data keeps on REG_0D & REG_0E */
	ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);

	/* restore the previous address */
	writeb(reg_save, db->io_addr);
	spin_unlock_irqrestore(&db->lock,flags);

	mutex_unlock(&db->addr_lock);

	dm9000_dbg(db, 5, "phy_read[%02x] -> %04x\n", reg, ret);
	return ret;
}

/*
 *   Write a word to phyxcer
 */
static void
dm9000_phy_write(struct net_device *dev,
		 int phyaddr_unused, int reg, int value)
{
	board_info_t *db = netdev_priv(dev);
	unsigned long flags;
	unsigned long reg_save;

	dm9000_dbg(db, 5, "phy_write[%02x] = %04x\n", reg, value);
	mutex_lock(&db->addr_lock);

	spin_lock_irqsave(&db->lock,flags);

	/* Save previous register address */
	reg_save = readb(db->io_addr);

	/* Fill the phyxcer register into REG_0C */
	iow(db, DM9000_EPAR, DM9000_PHY | reg);

	/* Fill the written data into REG_0D & REG_0E */
	iow(db, DM9000_EPDRL, value);
	iow(db, DM9000_EPDRH, value >> 8);

	iow(db, DM9000_EPCR, EPCR_EPOS | EPCR_ERPRW);	/* Issue phyxcer write command */

	writeb(reg_save, db->io_addr);
	spin_unlock_irqrestore(&db->lock, flags);

	dm9000_msleep(db, 1);		/* Wait write complete */

	spin_lock_irqsave(&db->lock,flags);
	reg_save = readb(db->io_addr);

	iow(db, DM9000_EPCR, 0x0);	/* Clear phyxcer write command */

	/* restore the previous address */
	writeb(reg_save, db->io_addr);

	spin_unlock_irqrestore(&db->lock, flags);
	mutex_unlock(&db->addr_lock);
}

static void
dm9000_shutdown(struct net_device *dev)
{
	board_info_t *db = netdev_priv(dev);

	/* RESET device */
	dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET);	/* PHY RESET */
	iow(db, DM9000_GPR, 0x01);	/* Power-Down PHY */
	iow(db, DM9000_IMR, IMR_PAR);	/* Disable all interrupt */
	iow(db, DM9000_RCR, 0x00);	/* Disable RX */
}

/*
 * Stop the interface.
 * The interface is stopped when it is brought.
 */
static int
dm9000_stop(struct net_device *ndev)
{
	board_info_t *db = netdev_priv(ndev);

	if (netif_msg_ifdown(db))
		dev_dbg(db->dev, "shutting down %s\n", ndev->name);

	cancel_delayed_work_sync(&db->phy_poll);

	netif_stop_queue(ndev);
	netif_carrier_off(ndev);

	/* free interrupt */
	free_irq(ndev->irq, ndev);

	dm9000_shutdown(ndev);

	return 0;
}

static const struct net_device_ops dm9000_netdev_ops = {
	.ndo_open		= dm9000_open,
	.ndo_stop		= dm9000_stop,
	.ndo_start_xmit		= dm9000_start_xmit,
	.ndo_tx_timeout		= dm9000_timeout,
	.ndo_set_multicast_list	= dm9000_hash_table,
	.ndo_do_ioctl		= dm9000_ioctl,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_set_features	= dm9000_set_features,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= eth_mac_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= dm9000_poll_controller,
#endif
};

/*
 * Search DM9000 board, allocate space and register it
 */
static int __devinit
dm9000_probe(struct platform_device *pdev)
{
	struct dm9000_plat_data *pdata = pdev->dev.platform_data;
	struct board_info *db;	/* Point a board information structure */
	struct net_device *ndev;
	const unsigned char *mac_src;
	int ret = 0;
	int iosize;
	int i;
	u32 id_val;

	/* Init network device */
	ndev = alloc_etherdev(sizeof(struct board_info));
	if (!ndev) {
		dev_err(&pdev->dev, "could not allocate device.\n");
		return -ENOMEM;
	}

	SET_NETDEV_DEV(ndev, &pdev->dev);

	dev_dbg(&pdev->dev, "dm9000_probe()\n");

	/* setup board info structure */
	db = netdev_priv(ndev);

	db->dev = &pdev->dev;
	db->ndev = ndev;

	spin_lock_init(&db->lock);
	mutex_init(&db->addr_lock);

	INIT_DELAYED_WORK(&db->phy_poll, dm9000_poll_work);

	db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	db->irq_res  = platform_get_resource(pdev, IORESOURCE_IRQ, 0);

	if (db->addr_res == NULL || db->data_res == NULL ||
	    db->irq_res == NULL) {
		dev_err(db->dev, "insufficient resources\n");
		ret = -ENOENT;
		goto out;
	}

	db->irq_wake = platform_get_irq(pdev, 1);
	if (db->irq_wake >= 0) {
		dev_dbg(db->dev, "wakeup irq %d\n", db->irq_wake);

		ret = request_irq(db->irq_wake, dm9000_wol_interrupt,
				  IRQF_SHARED, dev_name(db->dev), ndev);
		if (ret) {
			dev_err(db->dev, "cannot get wakeup irq (%d)\n", ret);
		} else {

			/* test to see if irq is really wakeup capable */
			ret = irq_set_irq_wake(db->irq_wake, 1);
			if (ret) {
				dev_err(db->dev, "irq %d cannot set wakeup (%d)\n",
					db->irq_wake, ret);
				ret = 0;
			} else {
				irq_set_irq_wake(db->irq_wake, 0);
				db->wake_supported = 1;
			}
		}
	}

	iosize = resource_size(db->addr_res);
	db->addr_req = request_mem_region(db->addr_res->start, iosize,
					  pdev->name);

	if (db->addr_req == NULL) {
		dev_err(db->dev, "cannot claim address reg area\n");
		ret = -EIO;
		goto out;
	}

	db->io_addr = ioremap(db->addr_res->start, iosize);

	if (db->io_addr == NULL) {
		dev_err(db->dev, "failed to ioremap address reg\n");
		ret = -EINVAL;
		goto out;
	}

	iosize = resource_size(db->data_res);
	db->data_req = request_mem_region(db->data_res->start, iosize,
					  pdev->name);

	if (db->data_req == NULL) {
		dev_err(db->dev, "cannot claim data reg area\n");
		ret = -EIO;
		goto out;
	}

	db->io_data = ioremap(db->data_res->start, iosize);

	if (db->io_data == NULL) {
		dev_err(db->dev, "failed to ioremap data reg\n");
		ret = -EINVAL;
		goto out;
	}

	/* fill in parameters for net-dev structure */
	ndev->base_addr = (unsigned long)db->io_addr;
	ndev->irq	= db->irq_res->start;

	/* ensure at least we have a default set of IO routines */
	dm9000_set_io(db, iosize);

	/* check to see if anything is being over-ridden */
	if (pdata != NULL) {
		/* check to see if the driver wants to over-ride the
		 * default IO width */

		if (pdata->flags & DM9000_PLATF_8BITONLY)
			dm9000_set_io(db, 1);

		if (pdata->flags & DM9000_PLATF_16BITONLY)
			dm9000_set_io(db, 2);

		if (pdata->flags & DM9000_PLATF_32BITONLY)
			dm9000_set_io(db, 4);

		/* check to see if there are any IO routine
		 * over-rides */

		if (pdata->inblk != NULL)
			db->inblk = pdata->inblk;

		if (pdata->outblk != NULL)
			db->outblk = pdata->outblk;

		if (pdata->dumpblk != NULL)
			db->dumpblk = pdata->dumpblk;

		db->flags = pdata->flags;
	}

#ifdef CONFIG_DM9000_FORCE_SIMPLE_PHY_POLL
	db->flags |= DM9000_PLATF_SIMPLE_PHY;
#endif

	dm9000_reset(db);

	/* try multiple times, DM9000 sometimes gets the read wrong */
	for (i = 0; i < 8; i++) {
		id_val  = ior(db, DM9000_VIDL);
		id_val |= (u32)ior(db, DM9000_VIDH) << 8;
		id_val |= (u32)ior(db, DM9000_PIDL) << 16;
		id_val |= (u32)ior(db, DM9000_PIDH) << 24;

		if (id_val == DM9000_ID)
			break;
		dev_err(db->dev, "read wrong id 0x%08x\n", id_val);
	}

	if (id_val != DM9000_ID) {
		dev_err(db->dev, "wrong id: 0x%08x\n", id_val);
		ret = -ENODEV;
		goto out;
	}

	/* Identify what type of DM9000 we are working on */

	id_val = ior(db, DM9000_CHIPR);
	dev_dbg(db->dev, "dm9000 revision 0x%02x\n", id_val);

	switch (id_val) {
	case CHIPR_DM9000A:
		db->type = TYPE_DM9000A;
		break;
	case CHIPR_DM9000B:
		db->type = TYPE_DM9000B;
		break;
	default:
		dev_dbg(db->dev, "ID %02x => defaulting to DM9000E\n", id_val);
		db->type = TYPE_DM9000E;
	}

	/* dm9000a/b are capable of hardware checksum offload */
	if (db->type == TYPE_DM9000A || db->type == TYPE_DM9000B) {
		ndev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
		ndev->features |= ndev->hw_features;
	}

	/* from this point we assume that we have found a DM9000 */

	/* driver system function */
	ether_setup(ndev);

	ndev->netdev_ops	= &dm9000_netdev_ops;
	ndev->watchdog_timeo	= msecs_to_jiffies(watchdog);
	ndev->ethtool_ops	= &dm9000_ethtool_ops;

	db->msg_enable       = NETIF_MSG_LINK;
	db->mii.phy_id_mask  = 0x1f;
	db->mii.reg_num_mask = 0x1f;
	db->mii.force_media  = 0;
	db->mii.full_duplex  = 0;
	db->mii.dev	     = ndev;
	db->mii.mdio_read    = dm9000_phy_read;
	db->mii.mdio_write   = dm9000_phy_write;

	mac_src = "eeprom";

	/* try reading the node address from the attached EEPROM */
	for (i = 0; i < 6; i += 2)
		dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i);

	if (!is_valid_ether_addr(ndev->dev_addr) && pdata != NULL) {
		mac_src = "platform data";
		memcpy(ndev->dev_addr, pdata->dev_addr, 6);
	}

	if (!is_valid_ether_addr(ndev->dev_addr)) {
		/* try reading from mac */
		
		mac_src = "chip";
		for (i = 0; i < 6; i++)
			ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
	}

	if (!is_valid_ether_addr(ndev->dev_addr)) {
		dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "
			 "set using ifconfig\n", ndev->name);

		random_ether_addr(ndev->dev_addr);
		mac_src = "random";
	}


	platform_set_drvdata(pdev, ndev);
	ret = register_netdev(ndev);

	if (ret == 0)
		printk(KERN_INFO "%s: dm9000%c at %p,%p IRQ %d MAC: %pM (%s)\n",
		       ndev->name, dm9000_type_to_char(db->type),
		       db->io_addr, db->io_data, ndev->irq,
		       ndev->dev_addr, mac_src);
	return 0;

out:
	dev_err(db->dev, "not found (%d).\n", ret);

	dm9000_release_board(pdev, db);
	free_netdev(ndev);

	return ret;
}

static int
dm9000_drv_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct net_device *ndev = platform_get_drvdata(pdev);
	board_info_t *db;

	if (ndev) {
		db = netdev_priv(ndev);
		db->in_suspend = 1;

		if (!netif_running(ndev))
			return 0;

		netif_device_detach(ndev);

		/* only shutdown if not using WoL */
		if (!db->wake_state)
			dm9000_shutdown(ndev);
	}
	return 0;
}

static int
dm9000_drv_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct net_device *ndev = platform_get_drvdata(pdev);
	board_info_t *db = netdev_priv(ndev);

	if (ndev) {
		if (netif_running(ndev)) {
			/* reset if we were not in wake mode to ensure if
			 * the device was powered off it is in a known state */
			if (!db->wake_state) {
				dm9000_reset(db);
				dm9000_init_dm9000(ndev);
			}

			netif_device_attach(ndev);
		}

		db->in_suspend = 0;
	}
	return 0;
}

static const struct dev_pm_ops dm9000_drv_pm_ops = {
	.suspend	= dm9000_drv_suspend,
	.resume		= dm9000_drv_resume,
};

static int __devexit
dm9000_drv_remove(struct platform_device *pdev)
{
	struct net_device *ndev = platform_get_drvdata(pdev);

	platform_set_drvdata(pdev, NULL);

	unregister_netdev(ndev);
	dm9000_release_board(pdev, netdev_priv(ndev));
	free_netdev(ndev);		/* free device structure */

	dev_dbg(&pdev->dev, "released and freed device\n");
	return 0;
}

static struct platform_driver dm9000_driver = {
	.driver	= {
		.name    = "dm9000",
		.owner	 = THIS_MODULE,
		.pm	 = &dm9000_drv_pm_ops,
	},
	.probe   = dm9000_probe,
	.remove  = __devexit_p(dm9000_drv_remove),
};

static int __init
dm9000_init(void)
{
	printk(KERN_INFO "%s Ethernet Driver, V%s\n", CARDNAME, DRV_VERSION);

	return platform_driver_register(&dm9000_driver);
}

static void __exit
dm9000_cleanup(void)
{
	platform_driver_unregister(&dm9000_driver);
}

module_init(dm9000_init);
module_exit(dm9000_cleanup);

MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
MODULE_DESCRIPTION("Davicom DM9000 network driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:dm9000");