summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/fujitsu/eth16i.c
blob: c3f0178fb5cb07dbc3e10b959e45492968821d05 (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
/* eth16i.c An ICL EtherTeam 16i and 32 EISA ethernet driver for Linux

   Written 1994-1999 by Mika Kuoppala

   Copyright (C) 1994-1999 by Mika Kuoppala
   Based on skeleton.c and heavily on at1700.c by Donald Becker

   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 miku@iki.fi

   This driver supports following cards :
	- ICL EtherTeam 16i
	- ICL EtherTeam 32 EISA
	  (Uses true 32 bit transfers rather than 16i compatibility mode)

   Example Module usage:
        insmod eth16i.o io=0x2a0 mediatype=bnc

	mediatype can be one of the following: bnc,tp,dix,auto,eprom

	'auto' will try to autoprobe mediatype.
	'eprom' will use whatever type defined in eprom.

   I have benchmarked driver with PII/300Mhz as a ftp client
   and 486/33Mhz as a ftp server. Top speed was 1128.37 kilobytes/sec.

   Sources:
     - skeleton.c  a sample network driver core for linux,
       written by Donald Becker <becker@scyld.com>
     - at1700.c a driver for Allied Telesis AT1700, written
       by Donald Becker.
     - e16iSRV.asm a Netware 3.X Server Driver for ICL EtherTeam16i
       written by Markku Viima
     - The Fujitsu MB86965 databook.

   Author thanks following persons due to their valueble assistance:
        Markku Viima (ICL)
	Ari Valve (ICL)
	Donald Becker
	Kurt Huwig <kurt@huwig.de>

   Revision history:

   Version	Date		Description

   0.01         15.12-94        Initial version (card detection)
   0.02         23.01-95        Interrupt is now hooked correctly
   0.03         01.02-95        Rewrote initialization part
   0.04         07.02-95        Base skeleton done...
                                Made a few changes to signature checking
                                to make it a bit reliable.
                                - fixed bug in tx_buf mapping
                                - fixed bug in initialization (DLC_EN
                                  wasn't enabled when initialization
                                  was done.)
   0.05         08.02-95        If there were more than one packet to send,
                                transmit was jammed due to invalid
                                register write...now fixed
   0.06         19.02-95        Rewrote interrupt handling
   0.07         13.04-95        Wrote EEPROM read routines
                                Card configuration now set according to
                                data read from EEPROM
   0.08         23.06-95        Wrote part that tries to probe used interface
                                port if AUTO is selected

   0.09         01.09-95        Added module support

   0.10         04.09-95        Fixed receive packet allocation to work
                                with kernels > 1.3.x

   0.20		20.09-95	Added support for EtherTeam32 EISA

   0.21         17.10-95        Removed the unnecessary extern
				init_etherdev() declaration. Some
				other cleanups.

   0.22		22.02-96	Receive buffer was not flushed
				correctly when faulty packet was
				received. Now fixed.

   0.23		26.02-96	Made resetting the adapter
			 	more reliable.

   0.24		27.02-96	Rewrote faulty packet handling in eth16i_rx

   0.25		22.05-96	kfree() was missing from cleanup_module.

   0.26		11.06-96	Sometimes card was not found by
				check_signature(). Now made more reliable.

   0.27		23.06-96	Oops. 16 consecutive collisions halted
				adapter. Now will try to retransmit
				MAX_COL_16 times before finally giving up.

   0.28	        28.10-97	Added dev_id parameter (NULL) for free_irq

   0.29         29.10-97        Multiple card support for module users

   0.30         30.10-97        Fixed irq allocation bug.
                                (request_irq moved from probe to open)

   0.30a        21.08-98        Card detection made more relaxed. Driver
                                had problems with some TCP/IP-PROM boots
				to find the card. Suggested by
				Kurt Huwig <kurt@huwig.de>

   0.31         28.08-98        Media interface port can now be selected
                                with module parameters or kernel
				boot parameters.

   0.32         31.08-98        IRQ was never freed if open/close
                                pair wasn't called. Now fixed.

   0.33         10.09-98        When eth16i_open() was called after
                                eth16i_close() chip never recovered.
				Now more shallow reset is made on
				close.

   0.34         29.06-99	Fixed one bad #ifdef.
				Changed ioaddr -> io for consistency

   0.35         01.07-99        transmit,-receive bytes were never
                                updated in stats.

   Bugs:
	In some cases the media interface autoprobing code doesn't find
	the correct interface type. In this case you can
	manually choose the interface type in DOS with E16IC.EXE which is
	configuration software for EtherTeam16i and EtherTeam32 cards.
	This is also true for IRQ setting. You cannot use module
	parameter to configure IRQ of the card (yet).

   To do:
	- Real multicast support
	- Rewrite the media interface autoprobing code. Its _horrible_ !
	- Possibly merge all the MB86965 specific code to external
	  module for use by eth16.c and Donald's at1700.c
	- IRQ configuration with module parameter. I will do
	  this when i will get enough info about setting
	  irq without configuration utility.
*/

static char *version =
    "eth16i.c: v0.35 01-Jul-1999 Mika Kuoppala (miku@iki.fi)\n";

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/bitops.h>
#include <linux/jiffies.h>
#include <linux/io.h>

#include <asm/system.h>
#include <asm/dma.h>



/* Few macros */
#define BITSET(ioaddr, bnum)   ((outb(((inb(ioaddr)) | (bnum)), ioaddr)))
#define BITCLR(ioaddr, bnum)   ((outb(((inb(ioaddr)) & (~(bnum))), ioaddr)))

/* This is the I/O address space for Etherteam 16i adapter. */
#define ETH16I_IO_EXTENT       32

/* Ticks before deciding that transmit has timed out */
#define TX_TIMEOUT             (400*HZ/1000)

/* Maximum loop count when receiving packets */
#define MAX_RX_LOOP            20

/* Some interrupt masks */
#define ETH16I_INTR_ON	       0xef8a       /* Higher is receive mask */
#define ETH16I_INTR_OFF	       0x0000

/* Buffers header status byte meanings */
#define PKT_GOOD               BIT(5)
#define PKT_GOOD_RMT           BIT(4)
#define PKT_SHORT              BIT(3)
#define PKT_ALIGN_ERR          BIT(2)
#define PKT_CRC_ERR            BIT(1)
#define PKT_RX_BUF_OVERFLOW    BIT(0)

/* Transmit status register (DLCR0) */
#define TX_STATUS_REG          0
#define TX_DONE                BIT(7)
#define NET_BUSY               BIT(6)
#define TX_PKT_RCD             BIT(5)
#define CR_LOST                BIT(4)
#define TX_JABBER_ERR	       BIT(3)
#define COLLISION              BIT(2)
#define COLLISIONS_16          BIT(1)

/* Receive status register (DLCR1) */
#define RX_STATUS_REG          1
#define RX_PKT                 BIT(7)  /* Packet received */
#define BUS_RD_ERR             BIT(6)
#define SHORT_PKT_ERR          BIT(3)
#define ALIGN_ERR              BIT(2)
#define CRC_ERR                BIT(1)
#define RX_BUF_OVERFLOW        BIT(0)

/* Transmit Interrupt Enable Register (DLCR2) */
#define TX_INTR_REG            2
#define TX_INTR_DONE           BIT(7)
#define TX_INTR_COL            BIT(2)
#define TX_INTR_16_COL         BIT(1)

/* Receive Interrupt Enable Register (DLCR3) */
#define RX_INTR_REG            3
#define RX_INTR_RECEIVE        BIT(7)
#define RX_INTR_SHORT_PKT      BIT(3)
#define RX_INTR_CRC_ERR        BIT(1)
#define RX_INTR_BUF_OVERFLOW   BIT(0)

/* Transmit Mode Register (DLCR4) */
#define TRANSMIT_MODE_REG      4
#define LOOPBACK_CONTROL       BIT(1)
#define CONTROL_OUTPUT         BIT(2)

/* Receive Mode Register (DLCR5) */
#define RECEIVE_MODE_REG       5
#define RX_BUFFER_EMPTY        BIT(6)
#define ACCEPT_BAD_PACKETS     BIT(5)
#define RECEIVE_SHORT_ADDR     BIT(4)
#define ACCEPT_SHORT_PACKETS   BIT(3)
#define REMOTE_RESET           BIT(2)

#define ADDRESS_FILTER_MODE    BIT(1) | BIT(0)
#define REJECT_ALL             0
#define ACCEPT_ALL             3
#define MODE_1                 1            /* NODE ID, BC, MC, 2-24th bit */
#define MODE_2                 2            /* NODE ID, BC, MC, Hash Table */

/* Configuration Register 0 (DLCR6) */
#define CONFIG_REG_0           6
#define DLC_EN                 BIT(7)
#define SRAM_CYCLE_TIME_100NS  BIT(6)
#define SYSTEM_BUS_WIDTH_8     BIT(5)       /* 1 = 8bit, 0 = 16bit */
#define BUFFER_WIDTH_8         BIT(4)       /* 1 = 8bit, 0 = 16bit */
#define TBS1                   BIT(3)
#define TBS0                   BIT(2)
#define SRAM_BS1               BIT(1)       /* 00=8kb,  01=16kb  */
#define SRAM_BS0               BIT(0)       /* 10=32kb, 11=64kb  */

#ifndef ETH16I_TX_BUF_SIZE                   /* 0 = 2kb, 1 = 4kb  */
#define ETH16I_TX_BUF_SIZE     3             /* 2 = 8kb, 3 = 16kb */
#endif
#define TX_BUF_1x2048          0
#define TX_BUF_2x2048          1
#define TX_BUF_2x4098          2
#define TX_BUF_2x8192          3

/* Configuration Register 1 (DLCR7) */
#define CONFIG_REG_1           7
#define POWERUP                BIT(5)

/* Transmit start register */
#define TRANSMIT_START_REG     10
#define TRANSMIT_START_RB      2
#define TX_START               BIT(7)       /* Rest of register bit indicate*/
                                            /* number of packets in tx buffer*/
/* Node ID registers (DLCR8-13) */
#define NODE_ID_0              8
#define NODE_ID_RB             0

/* Hash Table registers (HT8-15) */
#define HASH_TABLE_0           8
#define HASH_TABLE_RB          1

/* Buffer memory ports */
#define BUFFER_MEM_PORT_LB     8
#define DATAPORT               BUFFER_MEM_PORT_LB
#define BUFFER_MEM_PORT_HB     9

/* 16 Collision control register (BMPR11) */
#define COL_16_REG             11
#define HALT_ON_16             0x00
#define RETRANS_AND_HALT_ON_16 0x02

/* Maximum number of attempts to send after 16 concecutive collisions */
#define MAX_COL_16	       10

/* DMA Burst and Transceiver Mode Register (BMPR13) */
#define TRANSCEIVER_MODE_REG   13
#define TRANSCEIVER_MODE_RB    2
#define IO_BASE_UNLOCK	       BIT(7)
#define LOWER_SQUELCH_TRESH    BIT(6)
#define LINK_TEST_DISABLE      BIT(5)
#define AUI_SELECT             BIT(4)
#define DIS_AUTO_PORT_SEL      BIT(3)

/* Filter Self Receive Register (BMPR14)  */
#define FILTER_SELF_RX_REG     14
#define SKIP_RX_PACKET         BIT(2)
#define FILTER_SELF_RECEIVE    BIT(0)

/* EEPROM Control Register (BMPR 16) */
#define EEPROM_CTRL_REG        16

/* EEPROM Data Register (BMPR 17) */
#define EEPROM_DATA_REG        17

/* NMC93CSx6 EEPROM Control Bits */
#define CS_0                   0x00
#define CS_1                   0x20
#define SK_0                   0x00
#define SK_1                   0x40
#define DI_0                   0x00
#define DI_1                   0x80

/* NMC93CSx6 EEPROM Instructions */
#define EEPROM_READ            0x80

/* NMC93CSx6 EEPROM Addresses */
#define E_NODEID_0             0x02
#define E_NODEID_1             0x03
#define E_NODEID_2             0x04
#define E_PORT_SELECT          0x14
  #define E_PORT_BNC           0x00
  #define E_PORT_DIX           0x01
  #define E_PORT_TP            0x02
  #define E_PORT_AUTO          0x03
  #define E_PORT_FROM_EPROM    0x04
#define E_PRODUCT_CFG          0x30


/* Macro to slow down io between EEPROM clock transitions */
#define eeprom_slow_io() do { int _i = 40; while(--_i > 0) { inb(0x80); }}while(0)

/* Jumperless Configuration Register (BMPR19) */
#define JUMPERLESS_CONFIG      19

/* ID ROM registers, writing to them also resets some parts of chip */
#define ID_ROM_0               24
#define ID_ROM_7               31
#define RESET                  ID_ROM_0

/* This is the I/O address list to be probed when seeking the card */
static unsigned int eth16i_portlist[] __initdata = {
	0x260, 0x280, 0x2A0, 0x240, 0x340, 0x320, 0x380, 0x300, 0
};

static unsigned int eth32i_portlist[] __initdata = {
	0x1000, 0x2000, 0x3000, 0x4000, 0x5000, 0x6000, 0x7000, 0x8000,
	0x9000, 0xA000, 0xB000, 0xC000, 0xD000, 0xE000, 0xF000, 0
};

/* This is the Interrupt lookup table for Eth16i card */
static unsigned int eth16i_irqmap[] __initdata = { 9, 10, 5, 15, 0 };
#define NUM_OF_ISA_IRQS    4

/* This is the Interrupt lookup table for Eth32i card */
static unsigned int eth32i_irqmap[] __initdata = { 3, 5, 7, 9, 10, 11, 12, 15, 0 };
#define EISA_IRQ_REG	0xc89
#define NUM_OF_EISA_IRQS   8

static unsigned int eth16i_tx_buf_map[] = { 2048, 2048, 4096, 8192 };

/* Use 0 for production, 1 for verification, >2 for debug */
#ifndef ETH16I_DEBUG
#define ETH16I_DEBUG 0
#endif
static unsigned int eth16i_debug = ETH16I_DEBUG;

/* Information for each board */

struct eth16i_local {
	unsigned char     tx_started;
	unsigned char     tx_buf_busy;
	unsigned short    tx_queue;  /* Number of packets in transmit buffer */
	unsigned short    tx_queue_len;
	unsigned int      tx_buf_size;
	unsigned long     open_time;
	unsigned long     tx_buffered_packets;
	unsigned long     tx_buffered_bytes;
	unsigned long     col_16;
	spinlock_t	  lock;
};

/* Function prototypes */

static int     eth16i_probe1(struct net_device *dev, int ioaddr);
static int     eth16i_check_signature(int ioaddr);
static int     eth16i_probe_port(int ioaddr);
static void    eth16i_set_port(int ioaddr, int porttype);
static int     eth16i_send_probe_packet(int ioaddr, unsigned char *b, int l);
static int     eth16i_receive_probe_packet(int ioaddr);
static int     eth16i_get_irq(int ioaddr);
static int     eth16i_read_eeprom(int ioaddr, int offset);
static int     eth16i_read_eeprom_word(int ioaddr);
static void    eth16i_eeprom_cmd(int ioaddr, unsigned char command);
static int     eth16i_open(struct net_device *dev);
static int     eth16i_close(struct net_device *dev);
static netdev_tx_t eth16i_tx(struct sk_buff *skb, struct net_device *dev);
static void    eth16i_rx(struct net_device *dev);
static void    eth16i_timeout(struct net_device *dev);
static irqreturn_t eth16i_interrupt(int irq, void *dev_id);
static void    eth16i_reset(struct net_device *dev);
static void    eth16i_timeout(struct net_device *dev);
static void    eth16i_skip_packet(struct net_device *dev);
static void    eth16i_multicast(struct net_device *dev);
static void    eth16i_select_regbank(unsigned char regbank, int ioaddr);
static void    eth16i_initialize(struct net_device *dev, int boot);

#if 0
static int     eth16i_set_irq(struct net_device *dev);
#endif

#ifdef MODULE
static ushort  eth16i_parse_mediatype(const char* s);
#endif

static char cardname[] __initdata = "ICL EtherTeam 16i/32";

static int __init do_eth16i_probe(struct net_device *dev)
{
	int i;
	int ioaddr;
	int base_addr = dev->base_addr;

	if(eth16i_debug > 4)
		printk(KERN_DEBUG "Probing started for %s\n", cardname);

	if(base_addr > 0x1ff)           /* Check only single location */
		return eth16i_probe1(dev, base_addr);
	else if(base_addr != 0)         /* Don't probe at all */
		return -ENXIO;

	/* Seek card from the ISA io address space */
	for(i = 0; (ioaddr = eth16i_portlist[i]) ; i++)
		if(eth16i_probe1(dev, ioaddr) == 0)
			return 0;

	/* Seek card from the EISA io address space */
	for(i = 0; (ioaddr = eth32i_portlist[i]) ; i++)
		if(eth16i_probe1(dev, ioaddr) == 0)
			return 0;

	return -ENODEV;
}

#ifndef MODULE
struct net_device * __init eth16i_probe(int unit)
{
	struct net_device *dev = alloc_etherdev(sizeof(struct eth16i_local));
	int err;

	if (!dev)
		return ERR_PTR(-ENOMEM);

	sprintf(dev->name, "eth%d", unit);
	netdev_boot_setup_check(dev);

	err = do_eth16i_probe(dev);
	if (err)
		goto out;
	return dev;
out:
	free_netdev(dev);
	return ERR_PTR(err);
}
#endif

static const struct net_device_ops eth16i_netdev_ops = {
	.ndo_open               = eth16i_open,
	.ndo_stop               = eth16i_close,
	.ndo_start_xmit    	= eth16i_tx,
	.ndo_set_rx_mode	= eth16i_multicast,
	.ndo_tx_timeout 	= eth16i_timeout,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_set_mac_address 	= eth_mac_addr,
	.ndo_validate_addr	= eth_validate_addr,
};

static int __init eth16i_probe1(struct net_device *dev, int ioaddr)
{
	struct eth16i_local *lp = netdev_priv(dev);
	static unsigned version_printed;
	int retval;

	/* Let's grab the region */
	if (!request_region(ioaddr, ETH16I_IO_EXTENT, cardname))
		return -EBUSY;

	/*
	  The MB86985 chip has on register which holds information in which
	  io address the chip lies. First read this register and compare
	  it to our current io address and if match then this could
	  be our chip.
	  */

	if(ioaddr < 0x1000) {
		if(eth16i_portlist[(inb(ioaddr + JUMPERLESS_CONFIG) & 0x07)]
		   != ioaddr) {
			retval = -ENODEV;
			goto out;
		}
	}

	/* Now we will go a bit deeper and try to find the chip's signature */

	if(eth16i_check_signature(ioaddr) != 0) {
		retval = -ENODEV;
		goto out;
	}

	/*
	   Now it seems that we have found a ethernet chip in this particular
	   ioaddr. The MB86985 chip has this feature, that when you read a
	   certain register it will increase it's io base address to next
	   configurable slot. Now when we have found the chip, first thing is
	   to make sure that the chip's ioaddr will hold still here.
	   */

	eth16i_select_regbank(TRANSCEIVER_MODE_RB, ioaddr);
	outb(0x00, ioaddr + TRANSCEIVER_MODE_REG);

	outb(0x00, ioaddr + RESET);             /* Reset some parts of chip */
	BITSET(ioaddr + CONFIG_REG_0, BIT(7));  /* Disable the data link */

	if( (eth16i_debug & version_printed++) == 0)
		printk(KERN_INFO "%s", version);

	dev->base_addr = ioaddr;
	dev->irq = eth16i_get_irq(ioaddr);

	/* Try to obtain interrupt vector */

	if ((retval = request_irq(dev->irq, (void *)&eth16i_interrupt, 0, cardname, dev))) {
		printk(KERN_WARNING "%s at %#3x, but is unusable due to conflicting IRQ %d.\n",
		       cardname, ioaddr, dev->irq);
		goto out;
	}

	printk(KERN_INFO "%s: %s at %#3x, IRQ %d, ",
	       dev->name, cardname, ioaddr, dev->irq);


	/* Now we will have to lock the chip's io address */
	eth16i_select_regbank(TRANSCEIVER_MODE_RB, ioaddr);
	outb(0x38, ioaddr + TRANSCEIVER_MODE_REG);

	eth16i_initialize(dev, 1); /* Initialize rest of the chip's registers */

	/* Now let's same some energy by shutting down the chip ;) */
	BITCLR(ioaddr + CONFIG_REG_1, POWERUP);

	/* Initialize the device structure */
	dev->netdev_ops         = &eth16i_netdev_ops;
	dev->watchdog_timeo	= TX_TIMEOUT;
	spin_lock_init(&lp->lock);

	retval = register_netdev(dev);
	if (retval)
		goto out1;
	return 0;
out1:
	free_irq(dev->irq, dev);
out:
	release_region(ioaddr, ETH16I_IO_EXTENT);
	return retval;
}


static void eth16i_initialize(struct net_device *dev, int boot)
{
	int ioaddr = dev->base_addr;
	int i, node_w = 0;
	unsigned char node_byte = 0;

	/* Setup station address */
	eth16i_select_regbank(NODE_ID_RB, ioaddr);
	for(i = 0 ; i < 3 ; i++) {
		unsigned short node_val = eth16i_read_eeprom(ioaddr, E_NODEID_0 + i);
		((unsigned short *)dev->dev_addr)[i] = ntohs(node_val);
	}

	for(i = 0; i < 6; i++) {
		outb( ((unsigned char *)dev->dev_addr)[i], ioaddr + NODE_ID_0 + i);
		if(boot) {
			printk("%02x", inb(ioaddr + NODE_ID_0 + i));
			if(i != 5)
				printk(":");
		}
	}

	/* Now we will set multicast addresses to accept none */
	eth16i_select_regbank(HASH_TABLE_RB, ioaddr);
	for(i = 0; i < 8; i++)
		outb(0x00, ioaddr + HASH_TABLE_0 + i);

	/*
	  Now let's disable the transmitter and receiver, set the buffer ram
	  cycle time, bus width and buffer data path width. Also we shall
	  set transmit buffer size and total buffer size.
	  */

	eth16i_select_regbank(2, ioaddr);

	node_byte = 0;
	node_w = eth16i_read_eeprom(ioaddr, E_PRODUCT_CFG);

	if( (node_w & 0xFF00) == 0x0800)
		node_byte |= BUFFER_WIDTH_8;

	node_byte |= SRAM_BS1;

	if( (node_w & 0x00FF) == 64)
		node_byte |= SRAM_BS0;

	node_byte |= DLC_EN | SRAM_CYCLE_TIME_100NS | (ETH16I_TX_BUF_SIZE << 2);

	outb(node_byte, ioaddr + CONFIG_REG_0);

	/* We shall halt the transmitting, if 16 collisions are detected */
	outb(HALT_ON_16, ioaddr + COL_16_REG);

#ifdef MODULE
	/* if_port already set by init_module() */
#else
	dev->if_port = (dev->mem_start < E_PORT_FROM_EPROM) ?
		dev->mem_start : E_PORT_FROM_EPROM;
#endif

	/* Set interface port type */
	if(boot) {
		static const char * const porttype[] = {
			"BNC", "DIX", "TP", "AUTO", "FROM_EPROM"
		};

		switch(dev->if_port)
		{

		case E_PORT_FROM_EPROM:
			dev->if_port = eth16i_read_eeprom(ioaddr, E_PORT_SELECT);
			break;

		case E_PORT_AUTO:
			dev->if_port = eth16i_probe_port(ioaddr);
			break;

		case E_PORT_BNC:
		case E_PORT_TP:
		case E_PORT_DIX:
			break;
		}

		printk(" %s interface.\n", porttype[dev->if_port]);

		eth16i_set_port(ioaddr, dev->if_port);
	}

	/* Set Receive Mode to normal operation */
	outb(MODE_2, ioaddr + RECEIVE_MODE_REG);
}

static int eth16i_probe_port(int ioaddr)
{
	int i;
	int retcode;
	unsigned char dummy_packet[64];

	/* Powerup the chip */
	outb(0xc0 | POWERUP, ioaddr + CONFIG_REG_1);

	BITSET(ioaddr + CONFIG_REG_0, DLC_EN);

	eth16i_select_regbank(NODE_ID_RB, ioaddr);

	for(i = 0; i < 6; i++) {
		dummy_packet[i] = inb(ioaddr + NODE_ID_0 + i);
		dummy_packet[i+6] = inb(ioaddr + NODE_ID_0 + i);
	}

	dummy_packet[12] = 0x00;
	dummy_packet[13] = 0x04;
	memset(dummy_packet + 14, 0, sizeof(dummy_packet) - 14);

	eth16i_select_regbank(2, ioaddr);

	for(i = 0; i < 3; i++) {
		BITSET(ioaddr + CONFIG_REG_0, DLC_EN);
		BITCLR(ioaddr + CONFIG_REG_0, DLC_EN);
		eth16i_set_port(ioaddr, i);

		if(eth16i_debug > 1)
			printk(KERN_DEBUG "Set port number %d\n", i);

		retcode = eth16i_send_probe_packet(ioaddr, dummy_packet, 64);
		if(retcode == 0) {
			retcode = eth16i_receive_probe_packet(ioaddr);
			if(retcode != -1) {
				if(eth16i_debug > 1)
					printk(KERN_DEBUG "Eth16i interface port found at %d\n", i);
				return i;
			}
		}
		else {
			if(eth16i_debug > 1)
				printk(KERN_DEBUG "TRANSMIT_DONE timeout when probing interface port\n");
		}
	}

	if( eth16i_debug > 1)
		printk(KERN_DEBUG "Using default port\n");

	return E_PORT_BNC;
}

static void eth16i_set_port(int ioaddr, int porttype)
{
	unsigned short temp = 0;

	eth16i_select_regbank(TRANSCEIVER_MODE_RB, ioaddr);
	outb(LOOPBACK_CONTROL, ioaddr + TRANSMIT_MODE_REG);

	temp |= DIS_AUTO_PORT_SEL;

	switch(porttype) {

	case E_PORT_BNC :
		temp |= AUI_SELECT;
		break;

	case E_PORT_TP :
		break;

	case E_PORT_DIX :
		temp |= AUI_SELECT;
		BITSET(ioaddr + TRANSMIT_MODE_REG, CONTROL_OUTPUT);
		break;
	}

	outb(temp, ioaddr + TRANSCEIVER_MODE_REG);

	if(eth16i_debug > 1) {
		printk(KERN_DEBUG "TRANSMIT_MODE_REG = %x\n", inb(ioaddr + TRANSMIT_MODE_REG));
		printk(KERN_DEBUG "TRANSCEIVER_MODE_REG = %x\n",
		       inb(ioaddr+TRANSCEIVER_MODE_REG));
	}
}

static int eth16i_send_probe_packet(int ioaddr, unsigned char *b, int l)
{
	unsigned long starttime;

	outb(0xff, ioaddr + TX_STATUS_REG);

	outw(l, ioaddr + DATAPORT);
	outsw(ioaddr + DATAPORT, (unsigned short *)b, (l + 1) >> 1);

	starttime = jiffies;
	outb(TX_START | 1, ioaddr + TRANSMIT_START_REG);

	while( (inb(ioaddr + TX_STATUS_REG) & 0x80) == 0) {
		if( time_after(jiffies, starttime + TX_TIMEOUT)) {
			return -1;
		}
	}

	return 0;
}

static int eth16i_receive_probe_packet(int ioaddr)
{
	unsigned long starttime;

	starttime = jiffies;

	while((inb(ioaddr + TX_STATUS_REG) & 0x20) == 0) {
		if( time_after(jiffies, starttime + TX_TIMEOUT)) {

			if(eth16i_debug > 1)
				printk(KERN_DEBUG "Timeout occurred waiting transmit packet received\n");
			starttime = jiffies;
			while((inb(ioaddr + RX_STATUS_REG) & 0x80) == 0) {
				if( time_after(jiffies, starttime + TX_TIMEOUT)) {
					if(eth16i_debug > 1)
						printk(KERN_DEBUG "Timeout occurred waiting receive packet\n");
					return -1;
				}
			}

			if(eth16i_debug > 1)
				printk(KERN_DEBUG "RECEIVE_PACKET\n");
			return 0; /* Found receive packet */
		}
	}

	if(eth16i_debug > 1) {
		printk(KERN_DEBUG "TRANSMIT_PACKET_RECEIVED %x\n", inb(ioaddr + TX_STATUS_REG));
		printk(KERN_DEBUG "RX_STATUS_REG = %x\n", inb(ioaddr + RX_STATUS_REG));
	}

	return 0; /* Return success */
}

#if 0
static int eth16i_set_irq(struct net_device* dev)
{
	const int ioaddr = dev->base_addr;
	const int irq = dev->irq;
	int i = 0;

	if(ioaddr < 0x1000) {
		while(eth16i_irqmap[i] && eth16i_irqmap[i] != irq)
			i++;

		if(i < NUM_OF_ISA_IRQS) {
			u8 cbyte = inb(ioaddr + JUMPERLESS_CONFIG);
			cbyte = (cbyte & 0x3F) | (i << 6);
			outb(cbyte, ioaddr + JUMPERLESS_CONFIG);
			return 0;
		}
	}
	else {
		printk(KERN_NOTICE "%s: EISA Interrupt cannot be set. Use EISA Configuration utility.\n", dev->name);
	}

	return -1;

}
#endif

static int __init eth16i_get_irq(int ioaddr)
{
	unsigned char cbyte;

	if( ioaddr < 0x1000) {
		cbyte = inb(ioaddr + JUMPERLESS_CONFIG);
		return eth16i_irqmap[((cbyte & 0xC0) >> 6)];
	} else {  /* Oh..the card is EISA so method getting IRQ different */
		unsigned short index = 0;
		cbyte = inb(ioaddr + EISA_IRQ_REG);
		while( (cbyte & 0x01) == 0) {
			cbyte = cbyte >> 1;
			index++;
		}
		return eth32i_irqmap[index];
	}
}

static int __init eth16i_check_signature(int ioaddr)
{
	int i;
	unsigned char creg[4] = { 0 };

	for(i = 0; i < 4 ; i++) {

		creg[i] = inb(ioaddr + TRANSMIT_MODE_REG + i);

		if(eth16i_debug > 1)
			printk("eth16i: read signature byte %x at %x\n",
			       creg[i],
			       ioaddr + TRANSMIT_MODE_REG + i);
	}

	creg[0] &= 0x0F;      /* Mask collision cnr */
	creg[2] &= 0x7F;      /* Mask DCLEN bit */

#if 0
	/*
	   This was removed because the card was sometimes left to state
	   from which it couldn't be find anymore. If there is need
	   to more strict check still this have to be fixed.
	   */
	if( ! ((creg[0] == 0x06) && (creg[1] == 0x41)) ) {
		if(creg[1] != 0x42)
			return -1;
	}
#endif

	if( !((creg[2] == 0x36) && (creg[3] == 0xE0)) ) {
		creg[2] &= 0x40;
		creg[3] &= 0x03;

		if( !((creg[2] == 0x40) && (creg[3] == 0x00)) )
			return -1;
	}

	if(eth16i_read_eeprom(ioaddr, E_NODEID_0) != 0)
		return -1;

	if((eth16i_read_eeprom(ioaddr, E_NODEID_1) & 0xFF00) != 0x4B00)
		return -1;

	return 0;
}

static int eth16i_read_eeprom(int ioaddr, int offset)
{
	int data = 0;

	eth16i_eeprom_cmd(ioaddr, EEPROM_READ | offset);
	outb(CS_1, ioaddr + EEPROM_CTRL_REG);
	data = eth16i_read_eeprom_word(ioaddr);
	outb(CS_0 | SK_0, ioaddr + EEPROM_CTRL_REG);

	return data;
}

static int eth16i_read_eeprom_word(int ioaddr)
{
	int i;
	int data = 0;

	for(i = 16; i > 0; i--) {
		outb(CS_1 | SK_0, ioaddr + EEPROM_CTRL_REG);
		eeprom_slow_io();
		outb(CS_1 | SK_1, ioaddr + EEPROM_CTRL_REG);
		eeprom_slow_io();
		data = (data << 1) |
			((inb(ioaddr + EEPROM_DATA_REG) & DI_1) ? 1 : 0);

		eeprom_slow_io();
	}

	return data;
}

static void eth16i_eeprom_cmd(int ioaddr, unsigned char command)
{
	int i;

	outb(CS_0 | SK_0, ioaddr + EEPROM_CTRL_REG);
	outb(DI_0, ioaddr + EEPROM_DATA_REG);
	outb(CS_1 | SK_0, ioaddr + EEPROM_CTRL_REG);
	outb(DI_1, ioaddr + EEPROM_DATA_REG);
	outb(CS_1 | SK_1, ioaddr + EEPROM_CTRL_REG);

	for(i = 7; i >= 0; i--) {
		short cmd = ( (command & (1 << i)) ? DI_1 : DI_0 );
		outb(cmd, ioaddr + EEPROM_DATA_REG);
		outb(CS_1 | SK_0, ioaddr + EEPROM_CTRL_REG);
		eeprom_slow_io();
		outb(CS_1 | SK_1, ioaddr + EEPROM_CTRL_REG);
		eeprom_slow_io();
	}
}

static int eth16i_open(struct net_device *dev)
{
	struct eth16i_local *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;

	/* Powerup the chip */
	outb(0xc0 | POWERUP, ioaddr + CONFIG_REG_1);

	/* Initialize the chip */
	eth16i_initialize(dev, 0);

	/* Set the transmit buffer size */
	lp->tx_buf_size = eth16i_tx_buf_map[ETH16I_TX_BUF_SIZE & 0x03];

	if(eth16i_debug > 0)
		printk(KERN_DEBUG "%s: transmit buffer size %d\n",
		       dev->name, lp->tx_buf_size);

	/* Now enable Transmitter and Receiver sections */
	BITCLR(ioaddr + CONFIG_REG_0, DLC_EN);

	/* Now switch to register bank 2, for run time operation */
	eth16i_select_regbank(2, ioaddr);

	lp->open_time = jiffies;
	lp->tx_started = 0;
	lp->tx_queue = 0;
	lp->tx_queue_len = 0;

	/* Turn on interrupts*/
	outw(ETH16I_INTR_ON, ioaddr + TX_INTR_REG);

	netif_start_queue(dev);
	return 0;
}

static int eth16i_close(struct net_device *dev)
{
	struct eth16i_local *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;

	eth16i_reset(dev);

	/* Turn off interrupts*/
	outw(ETH16I_INTR_OFF, ioaddr + TX_INTR_REG);

	netif_stop_queue(dev);

	lp->open_time = 0;

	/* Disable transmit and receive */
	BITSET(ioaddr + CONFIG_REG_0, DLC_EN);

	/* Reset the chip */
	/* outb(0xff, ioaddr + RESET); */
	/* outw(0xffff, ioaddr + TX_STATUS_REG);    */

	outb(0x00, ioaddr + CONFIG_REG_1);

	return 0;
}

static void eth16i_timeout(struct net_device *dev)
{
	struct eth16i_local *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;
	/*
	   If we get here, some higher level has decided that
	   we are broken. There should really be a "kick me"
	   function call instead.
	   */

	outw(ETH16I_INTR_OFF, ioaddr + TX_INTR_REG);
	printk(KERN_WARNING "%s: transmit timed out with status %04x, %s ?\n",
	       dev->name,
	inw(ioaddr + TX_STATUS_REG),  (inb(ioaddr + TX_STATUS_REG) & TX_DONE) ?
		       "IRQ conflict" : "network cable problem");

	dev->trans_start = jiffies; /* prevent tx timeout */

	/* Let's dump all registers */
	if(eth16i_debug > 0) {
		printk(KERN_DEBUG "%s: timeout: %02x %02x %02x %02x %02x %02x %02x %02x.\n",
		       dev->name, inb(ioaddr + 0),
		       inb(ioaddr + 1), inb(ioaddr + 2),
		       inb(ioaddr + 3), inb(ioaddr + 4),
		       inb(ioaddr + 5),
		       inb(ioaddr + 6), inb(ioaddr + 7));

		printk(KERN_DEBUG "%s: transmit start reg: %02x. collision reg %02x\n",
		       dev->name, inb(ioaddr + TRANSMIT_START_REG),
		       inb(ioaddr + COL_16_REG));
			printk(KERN_DEBUG "lp->tx_queue = %d\n", lp->tx_queue);
		printk(KERN_DEBUG "lp->tx_queue_len = %d\n", lp->tx_queue_len);
		printk(KERN_DEBUG "lp->tx_started = %d\n", lp->tx_started);
	}
	dev->stats.tx_errors++;
	eth16i_reset(dev);
	dev->trans_start = jiffies; /* prevent tx timeout */
	outw(ETH16I_INTR_ON, ioaddr + TX_INTR_REG);
	netif_wake_queue(dev);
}

static netdev_tx_t eth16i_tx(struct sk_buff *skb, struct net_device *dev)
{
	struct eth16i_local *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;
	int status = 0;
	ushort length = skb->len;
	unsigned char *buf;
	unsigned long flags;

	if (length < ETH_ZLEN) {
		if (skb_padto(skb, ETH_ZLEN))
			return NETDEV_TX_OK;
		length = ETH_ZLEN;
	}
	buf = skb->data;

	netif_stop_queue(dev);

	/* Turn off TX interrupts */
	outw(ETH16I_INTR_OFF, ioaddr + TX_INTR_REG);

	/* We would be better doing the disable_irq tricks the 3c509 does,
	   that would make this suck a lot less */

	spin_lock_irqsave(&lp->lock, flags);

	if( (length + 2) > (lp->tx_buf_size - lp->tx_queue_len)) {
		if(eth16i_debug > 0)
			printk(KERN_WARNING "%s: Transmit buffer full.\n", dev->name);
	}
	else {
		outw(length, ioaddr + DATAPORT);

		if( ioaddr < 0x1000 )
			outsw(ioaddr + DATAPORT, buf, (length + 1) >> 1);
		else {
			unsigned char frag = length % 4;
			outsl(ioaddr + DATAPORT, buf, length >> 2);
			if( frag != 0 ) {
				outsw(ioaddr + DATAPORT, (buf + (length & 0xFFFC)), 1);
				if( frag == 3 )
					outsw(ioaddr + DATAPORT,
					      (buf + (length & 0xFFFC) + 2), 1);
			}
		}
		lp->tx_buffered_packets++;
		lp->tx_buffered_bytes = length;
		lp->tx_queue++;
		lp->tx_queue_len += length + 2;
	}
	lp->tx_buf_busy = 0;

	if(lp->tx_started == 0) {
		/* If the transmitter is idle..always trigger a transmit */
		outb(TX_START | lp->tx_queue, ioaddr + TRANSMIT_START_REG);
		lp->tx_queue = 0;
		lp->tx_queue_len = 0;
		lp->tx_started = 1;
		netif_wake_queue(dev);
	}
	else if(lp->tx_queue_len < lp->tx_buf_size - (ETH_FRAME_LEN + 2)) {
		/* There is still more room for one more packet in tx buffer */
		netif_wake_queue(dev);
	}

	spin_unlock_irqrestore(&lp->lock, flags);

	outw(ETH16I_INTR_ON, ioaddr + TX_INTR_REG);
	/* Turn TX interrupts back on */
	/* outb(TX_INTR_DONE | TX_INTR_16_COL, ioaddr + TX_INTR_REG); */
	status = 0;
	dev_kfree_skb(skb);
	return NETDEV_TX_OK;
}

static void eth16i_rx(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	int boguscount = MAX_RX_LOOP;

	/* Loop until all packets have been read */
	while( (inb(ioaddr + RECEIVE_MODE_REG) & RX_BUFFER_EMPTY) == 0) {

		/* Read status byte from receive buffer */
		ushort status = inw(ioaddr + DATAPORT);

		/* Get the size of the packet from receive buffer */
		ushort pkt_len = inw(ioaddr + DATAPORT);

		if(eth16i_debug > 4)
			printk(KERN_DEBUG "%s: Receiving packet mode %02x status %04x.\n",
			       dev->name,
			       inb(ioaddr + RECEIVE_MODE_REG), status);

		if( !(status & PKT_GOOD) ) {
			dev->stats.rx_errors++;

			if( (pkt_len < ETH_ZLEN) || (pkt_len > ETH_FRAME_LEN) ) {
				dev->stats.rx_length_errors++;
				eth16i_reset(dev);
				return;
			}
			else {
				eth16i_skip_packet(dev);
				dev->stats.rx_dropped++;
			}
		}
		else {   /* Ok so now we should have a good packet */
			struct sk_buff *skb;

			skb = netdev_alloc_skb(dev, pkt_len + 3);
			if( skb == NULL ) {
				printk(KERN_WARNING "%s: Could'n allocate memory for packet (len %d)\n",
				       dev->name, pkt_len);
				eth16i_skip_packet(dev);
				dev->stats.rx_dropped++;
				break;
			}

			skb_reserve(skb,2);

			/*
			   Now let's get the packet out of buffer.
			   size is (pkt_len + 1) >> 1, cause we are now reading words
			   and it have to be even aligned.
			   */

			if(ioaddr < 0x1000)
				insw(ioaddr + DATAPORT, skb_put(skb, pkt_len),
				     (pkt_len + 1) >> 1);
			else {
				unsigned char *buf = skb_put(skb, pkt_len);
				unsigned char frag = pkt_len % 4;

				insl(ioaddr + DATAPORT, buf, pkt_len >> 2);

				if(frag != 0) {
					unsigned short rest[2];
					rest[0] = inw( ioaddr + DATAPORT );
					if(frag == 3)
						rest[1] = inw( ioaddr + DATAPORT );

					memcpy(buf + (pkt_len & 0xfffc), (char *)rest, frag);
				}
			}

			skb->protocol=eth_type_trans(skb, dev);

			if( eth16i_debug > 5 ) {
				int i;
				printk(KERN_DEBUG "%s: Received packet of length %d.\n",
				       dev->name, pkt_len);
				for(i = 0; i < 14; i++)
					printk(KERN_DEBUG " %02x", skb->data[i]);
				printk(KERN_DEBUG ".\n");
			}
			netif_rx(skb);
			dev->stats.rx_packets++;
			dev->stats.rx_bytes += pkt_len;

		} /* else */

		if(--boguscount <= 0)
			break;

	} /* while */
}

static irqreturn_t eth16i_interrupt(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	struct eth16i_local *lp;
	int ioaddr = 0, status;
	int handled = 0;

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

	/* Turn off all interrupts from adapter */
	outw(ETH16I_INTR_OFF, ioaddr + TX_INTR_REG);

	/* eth16i_tx won't be called */
	spin_lock(&lp->lock);

	status = inw(ioaddr + TX_STATUS_REG);      /* Get the status */
	outw(status, ioaddr + TX_STATUS_REG);      /* Clear status bits */

	if (status)
		handled = 1;

	if(eth16i_debug > 3)
		printk(KERN_DEBUG "%s: Interrupt with status %04x.\n", dev->name, status);

	if( status & 0x7f00 ) {

		dev->stats.rx_errors++;

		if(status & (BUS_RD_ERR << 8) )
			printk(KERN_WARNING "%s: Bus read error.\n",dev->name);
		if(status & (SHORT_PKT_ERR << 8) )   dev->stats.rx_length_errors++;
		if(status & (ALIGN_ERR << 8) )       dev->stats.rx_frame_errors++;
		if(status & (CRC_ERR << 8) )	    dev->stats.rx_crc_errors++;
		if(status & (RX_BUF_OVERFLOW << 8) ) dev->stats.rx_over_errors++;
	}
	if( status & 0x001a) {

		dev->stats.tx_errors++;

		if(status & CR_LOST) dev->stats.tx_carrier_errors++;
		if(status & TX_JABBER_ERR) dev->stats.tx_window_errors++;

#if 0
		if(status & COLLISION) {
			dev->stats.collisions +=
				((inb(ioaddr+TRANSMIT_MODE_REG) & 0xF0) >> 4);
		}
#endif
		if(status & COLLISIONS_16) {
			if(lp->col_16 < MAX_COL_16) {
				lp->col_16++;
				dev->stats.collisions++;
				/* Resume transmitting, skip failed packet */
				outb(0x02, ioaddr + COL_16_REG);
			}
			else {
				printk(KERN_WARNING "%s: bailing out due to many consecutive 16-in-a-row collisions. Network cable problem?\n", dev->name);
			}
		}
	}

	if( status & 0x00ff ) {          /* Let's check the transmit status reg */

		if(status & TX_DONE) {         /* The transmit has been done */
			dev->stats.tx_packets = lp->tx_buffered_packets;
			dev->stats.tx_bytes += lp->tx_buffered_bytes;
			lp->col_16 = 0;

			if(lp->tx_queue) {           /* Is there still packets ? */
				/* There was packet(s) so start transmitting and write also
				   how many packets there is to be sended */
				outb(TX_START | lp->tx_queue, ioaddr + TRANSMIT_START_REG);
				lp->tx_queue = 0;
				lp->tx_queue_len = 0;
				lp->tx_started = 1;
			}
			else {
				lp->tx_started = 0;
			}
			netif_wake_queue(dev);
		}
	}

	if( ( status & 0x8000 ) ||
	    ( (inb(ioaddr + RECEIVE_MODE_REG) & RX_BUFFER_EMPTY) == 0) ) {
		eth16i_rx(dev);  /* We have packet in receive buffer */
	}

	/* Turn interrupts back on */
	outw(ETH16I_INTR_ON, ioaddr + TX_INTR_REG);

	if(lp->tx_queue_len < lp->tx_buf_size - (ETH_FRAME_LEN + 2)) {
		/* There is still more room for one more packet in tx buffer */
		netif_wake_queue(dev);
	}

	spin_unlock(&lp->lock);

	return IRQ_RETVAL(handled);
}

static void eth16i_skip_packet(struct net_device *dev)
{
	int ioaddr = dev->base_addr;

	inw(ioaddr + DATAPORT);
	inw(ioaddr + DATAPORT);
	inw(ioaddr + DATAPORT);

	outb(SKIP_RX_PACKET, ioaddr + FILTER_SELF_RX_REG);
	while( inb( ioaddr + FILTER_SELF_RX_REG ) != 0);
}

static void eth16i_reset(struct net_device *dev)
{
	struct eth16i_local *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;

	if(eth16i_debug > 1)
		printk(KERN_DEBUG "%s: Resetting device.\n", dev->name);

	BITSET(ioaddr + CONFIG_REG_0, DLC_EN);
	outw(0xffff, ioaddr + TX_STATUS_REG);
	eth16i_select_regbank(2, ioaddr);

	lp->tx_started = 0;
	lp->tx_buf_busy = 0;
	lp->tx_queue = 0;
	lp->tx_queue_len = 0;
	BITCLR(ioaddr + CONFIG_REG_0, DLC_EN);
}

static void eth16i_multicast(struct net_device *dev)
{
	int ioaddr = dev->base_addr;

	if (!netdev_mc_empty(dev) || dev->flags&(IFF_ALLMULTI|IFF_PROMISC))
	{
		outb(3, ioaddr + RECEIVE_MODE_REG);
	} else {
		outb(2, ioaddr + RECEIVE_MODE_REG);
	}
}

static void eth16i_select_regbank(unsigned char banknbr, int ioaddr)
{
	unsigned char data;

	data = inb(ioaddr + CONFIG_REG_1);
	outb( ((data & 0xF3) | ( (banknbr & 0x03) << 2)), ioaddr + CONFIG_REG_1);
}

#ifdef MODULE

static ushort eth16i_parse_mediatype(const char* s)
{
	if(!s)
		return E_PORT_FROM_EPROM;

        if (!strncmp(s, "bnc", 3))
		return E_PORT_BNC;
        else if (!strncmp(s, "tp", 2))
                return E_PORT_TP;
        else if (!strncmp(s, "dix", 3))
                return E_PORT_DIX;
        else if (!strncmp(s, "auto", 4))
		return E_PORT_AUTO;
	else
		return E_PORT_FROM_EPROM;
}

#define MAX_ETH16I_CARDS 4  /* Max number of Eth16i cards per module */

static struct net_device *dev_eth16i[MAX_ETH16I_CARDS];
static int io[MAX_ETH16I_CARDS];
#if 0
static int irq[MAX_ETH16I_CARDS];
#endif
static char* mediatype[MAX_ETH16I_CARDS];
static int debug = -1;

MODULE_AUTHOR("Mika Kuoppala <miku@iki.fi>");
MODULE_DESCRIPTION("ICL EtherTeam 16i/32 driver");
MODULE_LICENSE("GPL");


module_param_array(io, int, NULL, 0);
MODULE_PARM_DESC(io, "eth16i I/O base address(es)");

#if 0
module_param_array(irq, int, NULL, 0);
MODULE_PARM_DESC(irq, "eth16i interrupt request number");
#endif

module_param_array(mediatype, charp, NULL, 0);
MODULE_PARM_DESC(mediatype, "eth16i media type of interface(s) (bnc,tp,dix,auto,eprom)");

module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "eth16i debug level (0-6)");

int __init init_module(void)
{
	int this_dev, found = 0;
	struct net_device *dev;

	for (this_dev = 0; this_dev < MAX_ETH16I_CARDS; this_dev++) {
		dev = alloc_etherdev(sizeof(struct eth16i_local));
		if (!dev)
			break;

		dev->base_addr = io[this_dev];

	        if(debug != -1)
			eth16i_debug = debug;

		if(eth16i_debug > 1)
			printk(KERN_NOTICE "eth16i(%d): interface type %s\n", this_dev, mediatype[this_dev] ? mediatype[this_dev] : "none" );

		dev->if_port = eth16i_parse_mediatype(mediatype[this_dev]);

		if(io[this_dev] == 0) {
			if (this_dev != 0) { /* Only autoprobe 1st one */
				free_netdev(dev);
				break;
			}

			printk(KERN_NOTICE "eth16i.c: Presently autoprobing (not recommended) for a single card.\n");
		}

		if (do_eth16i_probe(dev) == 0) {
			dev_eth16i[found++] = dev;
			continue;
		}
		printk(KERN_WARNING "eth16i.c No Eth16i card found (i/o = 0x%x).\n",
		       io[this_dev]);
		free_netdev(dev);
		break;
	}
	if (found)
		return 0;
	return -ENXIO;
}

void __exit cleanup_module(void)
{
	int this_dev;

	for(this_dev = 0; this_dev < MAX_ETH16I_CARDS; this_dev++) {
		struct net_device *dev = dev_eth16i[this_dev];

		if (netdev_priv(dev)) {
			unregister_netdev(dev);
			free_irq(dev->irq, dev);
			release_region(dev->base_addr, ETH16I_IO_EXTENT);
			free_netdev(dev);
		}
	}
}
#endif /* MODULE */
OpenPOWER on IntegriCloud