aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/pcmcia/smc91c92_cs.c
blob: 48dbb35747d8aefa4f04ee098e1f8dd37b022ed7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
/*======================================================================

    A PCMCIA ethernet driver for SMC91c92-based cards.

    This driver supports Megahertz PCMCIA ethernet cards; and
    Megahertz, Motorola, Ositech, and Psion Dacom ethernet/modem
    multifunction cards.

    Copyright (C) 1999 David A. Hinds -- dahinds@users.sourceforge.net

    smc91c92_cs.c 1.122 2002/10/25 06:26:39

    This driver contains code written by Donald Becker
    (becker@scyld.com), Rowan Hughes (x-csrdh@jcu.edu.au),
    David Hinds (dahinds@users.sourceforge.net), and Erik Stahlman
    (erik@vt.edu).  Donald wrote the SMC 91c92 code using parts of
    Erik's SMC 91c94 driver.  Rowan wrote a similar driver, and I've
    incorporated some parts of his driver here.  I (Dave) wrote most
    of the PCMCIA glue code, and the Ositech support code.  Kelly
    Stephens (kstephen@holli.com) added support for the Motorola
    Mariner, with help from Allen Brost.

    This software may be used and distributed according to the terms of
    the GNU General Public License, incorporated herein by reference.

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

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/crc32.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/ioport.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/jiffies.h>
#include <linux/firmware.h>

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

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

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

static const char *if_names[] = { "auto", "10baseT", "10base2"};

/* Firmware name */
#define FIRMWARE_NAME		"ositech/Xilinx7OD.bin"

/* Module parameters */

MODULE_DESCRIPTION("SMC 91c92 series PCMCIA ethernet driver");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE(FIRMWARE_NAME);

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

/*
  Transceiver/media type.
   0 = auto
   1 = 10baseT (and autoselect if #define AUTOSELECT),
   2 = AUI/10base2,
*/
INT_MODULE_PARM(if_port, 0);

#ifdef PCMCIA_DEBUG
INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
static const char *version =
"smc91c92_cs.c 1.123 2006/11/09 Donald Becker, becker@scyld.com.\n";
#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
#else
#define DEBUG(n, args...)
#endif

#define DRV_NAME	"smc91c92_cs"
#define DRV_VERSION	"1.123"

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

/* Operational parameter that usually are not changed. */

/* Time in jiffies before concluding Tx hung */
#define TX_TIMEOUT		((400*HZ)/1000)

/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
#define INTR_WORK		4

/* Times to check the check the chip before concluding that it doesn't
   currently have room for another Tx packet. */
#define MEMORY_WAIT_TIME       	8

struct smc_private {
	struct pcmcia_device	*p_dev;
    spinlock_t			lock;
    u_short			manfid;
    u_short			cardid;

    dev_node_t			node;
    struct sk_buff		*saved_skb;
    int				packets_waiting;
    void			__iomem *base;
    u_short			cfg;
    struct timer_list		media;
    int				watchdog, tx_err;
    u_short			media_status;
    u_short			fast_poll;
    u_short			link_status;
    struct mii_if_info		mii_if;
    int				duplex;
    int				rx_ovrn;
};

struct smc_cfg_mem {
    tuple_t tuple;
    cisparse_t parse;
    u_char buf[255];
};

/* Special definitions for Megahertz multifunction cards */
#define MEGAHERTZ_ISR		0x0380

/* Special function registers for Motorola Mariner */
#define MOT_LAN			0x0000
#define MOT_UART		0x0020
#define MOT_EEPROM		0x20

#define MOT_NORMAL \
(COR_LEVEL_REQ | COR_FUNC_ENA | COR_ADDR_DECODE | COR_IREQ_ENA)

/* Special function registers for Ositech cards */
#define OSITECH_AUI_CTL		0x0c
#define OSITECH_PWRDOWN		0x0d
#define OSITECH_RESET		0x0e
#define OSITECH_ISR		0x0f
#define OSITECH_AUI_PWR		0x0c
#define OSITECH_RESET_ISR	0x0e

#define OSI_AUI_PWR		0x40
#define OSI_LAN_PWRDOWN		0x02
#define OSI_MODEM_PWRDOWN	0x01
#define OSI_LAN_RESET		0x02
#define OSI_MODEM_RESET		0x01

/* Symbolic constants for the SMC91c9* series chips, from Erik Stahlman. */
#define	BANK_SELECT		14		/* Window select register. */
#define SMC_SELECT_BANK(x)  { outw(x, ioaddr + BANK_SELECT); }

/* Bank 0 registers. */
#define	TCR 		0	/* transmit control register */
#define	 TCR_CLEAR	0	/* do NOTHING */
#define  TCR_ENABLE	0x0001	/* if this is 1, we can transmit */
#define	 TCR_PAD_EN	0x0080	/* pads short packets to 64 bytes */
#define  TCR_MONCSN	0x0400  /* Monitor Carrier. */
#define  TCR_FDUPLX	0x0800  /* Full duplex mode. */
#define	 TCR_NORMAL TCR_ENABLE | TCR_PAD_EN

#define EPH		2	/* Ethernet Protocol Handler report. */
#define  EPH_TX_SUC	0x0001
#define  EPH_SNGLCOL	0x0002
#define  EPH_MULCOL	0x0004
#define  EPH_LTX_MULT	0x0008
#define  EPH_16COL	0x0010
#define  EPH_SQET	0x0020
#define  EPH_LTX_BRD	0x0040
#define  EPH_TX_DEFR	0x0080
#define  EPH_LAT_COL	0x0200
#define  EPH_LOST_CAR	0x0400
#define  EPH_EXC_DEF	0x0800
#define  EPH_CTR_ROL	0x1000
#define  EPH_RX_OVRN	0x2000
#define  EPH_LINK_OK	0x4000
#define  EPH_TX_UNRN	0x8000
#define MEMINFO		8	/* Memory Information Register */
#define MEMCFG		10	/* Memory Configuration Register */

/* Bank 1 registers. */
#define CONFIG			0
#define  CFG_MII_SELECT		0x8000	/* 91C100 only */
#define  CFG_NO_WAIT		0x1000
#define  CFG_FULL_STEP		0x0400
#define  CFG_SET_SQLCH		0x0200
#define  CFG_AUI_SELECT	 	0x0100
#define  CFG_16BIT		0x0080
#define  CFG_DIS_LINK		0x0040
#define  CFG_STATIC		0x0030
#define  CFG_IRQ_SEL_1		0x0004
#define  CFG_IRQ_SEL_0		0x0002
#define BASE_ADDR		2
#define	ADDR0			4
#define	GENERAL			10
#define	CONTROL			12
#define  CTL_STORE		0x0001
#define  CTL_RELOAD		0x0002
#define  CTL_EE_SELECT		0x0004
#define  CTL_TE_ENABLE		0x0020
#define  CTL_CR_ENABLE		0x0040
#define  CTL_LE_ENABLE		0x0080
#define  CTL_AUTO_RELEASE	0x0800
#define	 CTL_POWERDOWN		0x2000

/* Bank 2 registers. */
#define MMU_CMD		0
#define	 MC_ALLOC	0x20  	/* or with number of 256 byte packets */
#define	 MC_RESET	0x40
#define  MC_RELEASE  	0x80  	/* remove and release the current rx packet */
#define  MC_FREEPKT  	0xA0  	/* Release packet in PNR register */
#define  MC_ENQUEUE	0xC0 	/* Enqueue the packet for transmit */
#define	PNR_ARR		2
#define FIFO_PORTS	4
#define  FP_RXEMPTY	0x8000
#define	POINTER		6
#define  PTR_AUTO_INC	0x0040
#define  PTR_READ	0x2000
#define	 PTR_AUTOINC 	0x4000
#define	 PTR_RCV	0x8000
#define	DATA_1		8
#define	INTERRUPT	12
#define  IM_RCV_INT		0x1
#define	 IM_TX_INT		0x2
#define	 IM_TX_EMPTY_INT	0x4
#define	 IM_ALLOC_INT		0x8
#define	 IM_RX_OVRN_INT		0x10
#define	 IM_EPH_INT		0x20

#define	RCR		4
enum RxCfg { RxAllMulti = 0x0004, RxPromisc = 0x0002,
	     RxEnable = 0x0100, RxStripCRC = 0x0200};
#define  RCR_SOFTRESET	0x8000 	/* resets the chip */
#define	 RCR_STRIP_CRC	0x200	/* strips CRC */
#define  RCR_ENABLE	0x100	/* IFF this is set, we can receive packets */
#define  RCR_ALMUL	0x4 	/* receive all multicast packets */
#define	 RCR_PROMISC	0x2	/* enable promiscuous mode */

/* the normal settings for the RCR register : */
#define	 RCR_NORMAL	(RCR_STRIP_CRC | RCR_ENABLE)
#define  RCR_CLEAR	0x0		/* set it to a base state */
#define	COUNTER		6

/* BANK 3 -- not the same values as in smc9194! */
#define	MULTICAST0	0
#define	MULTICAST2	2
#define	MULTICAST4	4
#define	MULTICAST6	6
#define MGMT    	8
#define REVISION	0x0a

/* Transmit status bits. */
#define TS_SUCCESS 0x0001
#define TS_16COL   0x0010
#define TS_LATCOL  0x0200
#define TS_LOSTCAR 0x0400

/* Receive status bits. */
#define RS_ALGNERR	0x8000
#define RS_BADCRC	0x2000
#define RS_ODDFRAME	0x1000
#define RS_TOOLONG	0x0800
#define RS_TOOSHORT	0x0400
#define RS_MULTICAST	0x0001
#define RS_ERRORS	(RS_ALGNERR | RS_BADCRC | RS_TOOLONG | RS_TOOSHORT)

#define set_bits(v, p) outw(inw(p)|(v), (p))
#define mask_bits(v, p) outw(inw(p)&(v), (p))

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

static void smc91c92_detach(struct pcmcia_device *p_dev);
static int smc91c92_config(struct pcmcia_device *link);
static void smc91c92_release(struct pcmcia_device *link);

static int smc_open(struct net_device *dev);
static int smc_close(struct net_device *dev);
static int smc_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static void smc_tx_timeout(struct net_device *dev);
static int smc_start_xmit(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t smc_interrupt(int irq, void *dev_id);
static void smc_rx(struct net_device *dev);
static void set_rx_mode(struct net_device *dev);
static int s9k_config(struct net_device *dev, struct ifmap *map);
static void smc_set_xcvr(struct net_device *dev, int if_port);
static void smc_reset(struct net_device *dev);
static void media_check(u_long arg);
static void mdio_sync(unsigned int addr);
static int mdio_read(struct net_device *dev, int phy_id, int loc);
static void mdio_write(struct net_device *dev, int phy_id, int loc, int value);
static int smc_link_ok(struct net_device *dev);
static const struct ethtool_ops ethtool_ops;

static const struct net_device_ops smc_netdev_ops = {
	.ndo_open		= smc_open,
	.ndo_stop		= smc_close,
	.ndo_start_xmit		= smc_start_xmit,
	.ndo_tx_timeout 	= smc_tx_timeout,
	.ndo_set_config 	= s9k_config,
	.ndo_set_multicast_list = set_rx_mode,
	.ndo_do_ioctl		= &smc_ioctl,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_set_mac_address 	= eth_mac_addr,
	.ndo_validate_addr	= eth_validate_addr,
};

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

  smc91c92_attach() creates an "instance" of the driver, allocating
  local data structures for one device.  The device is registered
  with Card Services.

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

static int smc91c92_probe(struct pcmcia_device *link)
{
    struct smc_private *smc;
    struct net_device *dev;

    DEBUG(0, "smc91c92_attach()\n");

    /* Create new ethernet device */
    dev = alloc_etherdev(sizeof(struct smc_private));
    if (!dev)
	return -ENOMEM;
    smc = netdev_priv(dev);
    smc->p_dev = link;
    link->priv = dev;

    spin_lock_init(&smc->lock);
    link->io.NumPorts1 = 16;
    link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
    link->io.IOAddrLines = 4;
    link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_HANDLE_PRESENT;
    link->irq.IRQInfo1 = IRQ_LEVEL_ID;
    link->irq.Handler = &smc_interrupt;
    link->irq.Instance = dev;
    link->conf.Attributes = CONF_ENABLE_IRQ;
    link->conf.IntType = INT_MEMORY_AND_IO;

    /* The SMC91c92-specific entries in the device structure. */
    dev->netdev_ops = &smc_netdev_ops;
    SET_ETHTOOL_OPS(dev, &ethtool_ops);
    dev->watchdog_timeo = TX_TIMEOUT;

    smc->mii_if.dev = dev;
    smc->mii_if.mdio_read = mdio_read;
    smc->mii_if.mdio_write = mdio_write;
    smc->mii_if.phy_id_mask = 0x1f;
    smc->mii_if.reg_num_mask = 0x1f;

    return smc91c92_config(link);
} /* smc91c92_attach */

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

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

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

static void smc91c92_detach(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;

    DEBUG(0, "smc91c92_detach(0x%p)\n", link);

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

    smc91c92_release(link);

    free_netdev(dev);
} /* smc91c92_detach */

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

static int cvt_ascii_address(struct net_device *dev, char *s)
{
    int i, j, da, c;

    if (strlen(s) != 12)
	return -1;
    for (i = 0; i < 6; i++) {
	da = 0;
	for (j = 0; j < 2; j++) {
	    c = *s++;
	    da <<= 4;
	    da += ((c >= '0') && (c <= '9')) ?
		(c - '0') : ((c & 0x0f) + 9);
	}
	dev->dev_addr[i] = da;
    }
    return 0;
}

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

static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple,
		cisparse_t *parse)
{
	int i;

	i = pcmcia_get_first_tuple(handle, tuple);
	if (i != 0)
		return i;
	i = pcmcia_get_tuple_data(handle, tuple);
	if (i != 0)
		return i;
	return pcmcia_parse_tuple(tuple, parse);
}

static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple,
		cisparse_t *parse)
{
	int i;

	if ((i = pcmcia_get_next_tuple(handle, tuple)) != 0 ||
			(i = pcmcia_get_tuple_data(handle, tuple)) != 0)
		return i;
	return pcmcia_parse_tuple(tuple, parse);
}

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

    Configuration stuff for Megahertz cards

    mhz_3288_power() is used to power up a 3288's ethernet chip.
    mhz_mfc_config() handles socket setup for multifunction (1144
    and 3288) cards.  mhz_setup() gets a card's hardware ethernet
    address.

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

static int mhz_3288_power(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    struct smc_private *smc = netdev_priv(dev);
    u_char tmp;

    /* Read the ISR twice... */
    readb(smc->base+MEGAHERTZ_ISR);
    udelay(5);
    readb(smc->base+MEGAHERTZ_ISR);

    /* Pause 200ms... */
    mdelay(200);

    /* Now read and write the COR... */
    tmp = readb(smc->base + link->conf.ConfigBase + CISREG_COR);
    udelay(5);
    writeb(tmp, smc->base + link->conf.ConfigBase + CISREG_COR);

    return 0;
}

static int mhz_mfc_config_check(struct pcmcia_device *p_dev,
				cistpl_cftable_entry_t *cf,
				cistpl_cftable_entry_t *dflt,
				unsigned int vcc,
				void *priv_data)
{
	int k;
	p_dev->io.BasePort2 = cf->io.win[0].base;
	for (k = 0; k < 0x400; k += 0x10) {
		if (k & 0x80)
			continue;
		p_dev->io.BasePort1 = k ^ 0x300;
		if (!pcmcia_request_io(p_dev, &p_dev->io))
			return 0;
	}
	return -ENODEV;
}

static int mhz_mfc_config(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    struct smc_private *smc = netdev_priv(dev);
    struct smc_cfg_mem *cfg_mem;
    win_req_t req;
    memreq_t mem;
    int i;

    cfg_mem = kmalloc(sizeof(struct smc_cfg_mem), GFP_KERNEL);
    if (!cfg_mem)
	    return -ENOMEM;

    link->conf.Attributes |= CONF_ENABLE_SPKR;
    link->conf.Status = CCSR_AUDIO_ENA;
    link->irq.Attributes =
	IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED|IRQ_HANDLE_PRESENT;
    link->io.IOAddrLines = 16;
    link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
    link->io.NumPorts2 = 8;

    /* The Megahertz combo cards have modem-like CIS entries, so
       we have to explicitly try a bunch of port combinations. */
    if (pcmcia_loop_config(link, mhz_mfc_config_check, NULL))
	goto free_cfg_mem;
    dev->base_addr = link->io.BasePort1;

    /* Allocate a memory window, for accessing the ISR */
    req.Attributes = WIN_DATA_WIDTH_8|WIN_MEMORY_TYPE_AM|WIN_ENABLE;
    req.Base = req.Size = 0;
    req.AccessSpeed = 0;
    i = pcmcia_request_window(&link, &req, &link->win);
    if (i != 0)
	goto free_cfg_mem;
    smc->base = ioremap(req.Base, req.Size);
    mem.CardOffset = mem.Page = 0;
    if (smc->manfid == MANFID_MOTOROLA)
	mem.CardOffset = link->conf.ConfigBase;
    i = pcmcia_map_mem_page(link->win, &mem);

    if ((i == 0)
	&& (smc->manfid == MANFID_MEGAHERTZ)
	&& (smc->cardid == PRODID_MEGAHERTZ_EM3288))
	mhz_3288_power(link);

free_cfg_mem:
    kfree(cfg_mem);
    return -ENODEV;
}

static int mhz_setup(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    struct smc_cfg_mem *cfg_mem;
    tuple_t *tuple;
    cisparse_t *parse;
    u_char *buf, *station_addr;
    int rc;

    cfg_mem = kmalloc(sizeof(struct smc_cfg_mem), GFP_KERNEL);
    if (!cfg_mem)
	return -1;

    tuple = &cfg_mem->tuple;
    parse = &cfg_mem->parse;
    buf = cfg_mem->buf;

    tuple->Attributes = tuple->TupleOffset = 0;
    tuple->TupleData = (cisdata_t *)buf;
    tuple->TupleDataMax = 255;

    /* Read the station address from the CIS.  It is stored as the last
       (fourth) string in the Version 1 Version/ID tuple. */
    tuple->DesiredTuple = CISTPL_VERS_1;
    if (first_tuple(link, tuple, parse) != 0) {
	rc = -1;
	goto free_cfg_mem;
    }
    /* Ugh -- the EM1144 card has two VERS_1 tuples!?! */
    if (next_tuple(link, tuple, parse) != 0)
	first_tuple(link, tuple, parse);
    if (parse->version_1.ns > 3) {
	station_addr = parse->version_1.str + parse->version_1.ofs[3];
	if (cvt_ascii_address(dev, station_addr) == 0) {
		rc = 0;
		goto free_cfg_mem;
	}
    }

    /* Another possibility: for the EM3288, in a special tuple */
    tuple->DesiredTuple = 0x81;
    if (pcmcia_get_first_tuple(link, tuple) != 0) {
	rc = -1;
	goto free_cfg_mem;
    }
    if (pcmcia_get_tuple_data(link, tuple) != 0) {
	rc = -1;
	goto free_cfg_mem;
    }
    buf[12] = '\0';
    if (cvt_ascii_address(dev, buf) == 0) {
	rc = 0;
	goto free_cfg_mem;
   }
    rc = -1;
free_cfg_mem:
   kfree(cfg_mem);
   return rc;
}

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

    Configuration stuff for the Motorola Mariner

    mot_config() writes directly to the Mariner configuration
    registers because the CIS is just bogus.

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

static void mot_config(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    struct smc_private *smc = netdev_priv(dev);
    unsigned int ioaddr = dev->base_addr;
    unsigned int iouart = link->io.BasePort2;

    /* Set UART base address and force map with COR bit 1 */
    writeb(iouart & 0xff,        smc->base + MOT_UART + CISREG_IOBASE_0);
    writeb((iouart >> 8) & 0xff, smc->base + MOT_UART + CISREG_IOBASE_1);
    writeb(MOT_NORMAL,           smc->base + MOT_UART + CISREG_COR);

    /* Set SMC base address and force map with COR bit 1 */
    writeb(ioaddr & 0xff,        smc->base + MOT_LAN + CISREG_IOBASE_0);
    writeb((ioaddr >> 8) & 0xff, smc->base + MOT_LAN + CISREG_IOBASE_1);
    writeb(MOT_NORMAL,           smc->base + MOT_LAN + CISREG_COR);

    /* Wait for things to settle down */
    mdelay(100);
}

static int mot_setup(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    unsigned int ioaddr = dev->base_addr;
    int i, wait, loop;
    u_int addr;

    /* Read Ethernet address from Serial EEPROM */

    for (i = 0; i < 3; i++) {
	SMC_SELECT_BANK(2);
	outw(MOT_EEPROM + i, ioaddr + POINTER);
	SMC_SELECT_BANK(1);
	outw((CTL_RELOAD | CTL_EE_SELECT), ioaddr + CONTROL);

	for (loop = wait = 0; loop < 200; loop++) {
	    udelay(10);
	    wait = ((CTL_RELOAD | CTL_STORE) & inw(ioaddr + CONTROL));
	    if (wait == 0) break;
	}
	
	if (wait)
	    return -1;
	
	addr = inw(ioaddr + GENERAL);
	dev->dev_addr[2*i]   = addr & 0xff;
	dev->dev_addr[2*i+1] = (addr >> 8) & 0xff;
    }

    return 0;
}

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

static int smc_configcheck(struct pcmcia_device *p_dev,
			   cistpl_cftable_entry_t *cf,
			   cistpl_cftable_entry_t *dflt,
			   unsigned int vcc,
			   void *priv_data)
{
	p_dev->io.BasePort1 = cf->io.win[0].base;
	p_dev->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK;
	return pcmcia_request_io(p_dev, &p_dev->io);
}

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

    link->io.NumPorts1 = 16;
    i = pcmcia_loop_config(link, smc_configcheck, NULL);
    if (!i)
	    dev->base_addr = link->io.BasePort1;

    return i;
}

static int smc_setup(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    struct smc_cfg_mem *cfg_mem;
    tuple_t *tuple;
    cisparse_t *parse;
    cistpl_lan_node_id_t *node_id;
    u_char *buf, *station_addr;
    int i, rc;

    cfg_mem = kmalloc(sizeof(struct smc_cfg_mem), GFP_KERNEL);
    if (!cfg_mem)
	    return -ENOMEM;

    tuple = &cfg_mem->tuple;
    parse = &cfg_mem->parse;
    buf = cfg_mem->buf;

    tuple->Attributes = tuple->TupleOffset = 0;
    tuple->TupleData = (cisdata_t *)buf;
    tuple->TupleDataMax = 255;

    /* Check for a LAN function extension tuple */
    tuple->DesiredTuple = CISTPL_FUNCE;
    i = first_tuple(link, tuple, parse);
    while (i == 0) {
	if (parse->funce.type == CISTPL_FUNCE_LAN_NODE_ID)
	    break;
	i = next_tuple(link, tuple, parse);
    }
    if (i == 0) {
	node_id = (cistpl_lan_node_id_t *)parse->funce.data;
	if (node_id->nb == 6) {
	    for (i = 0; i < 6; i++)
		dev->dev_addr[i] = node_id->id[i];
	    rc = 0;
	    goto free_cfg_mem;
	}
    }
    /* Try the third string in the Version 1 Version/ID tuple. */
    if (link->prod_id[2]) {
	station_addr = link->prod_id[2];
	if (cvt_ascii_address(dev, station_addr) == 0) {
		rc = 0;
		goto free_cfg_mem;
	}
    }

    rc = -1;
free_cfg_mem:
    kfree(cfg_mem);
    return rc;
}

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

static int osi_config(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    static const unsigned int com[4] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
    int i, j;

    link->conf.Attributes |= CONF_ENABLE_SPKR;
    link->conf.Status = CCSR_AUDIO_ENA;
    link->irq.Attributes =
	IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED|IRQ_HANDLE_PRESENT;
    link->io.NumPorts1 = 64;
    link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
    link->io.NumPorts2 = 8;
    link->io.IOAddrLines = 16;

    /* Enable Hard Decode, LAN, Modem */
    link->conf.ConfigIndex = 0x23;

    for (i = j = 0; j < 4; j++) {
	link->io.BasePort2 = com[j];
	i = pcmcia_request_io(link, &link->io);
	if (i == 0)
		break;
    }
    if (i != 0) {
	/* Fallback: turn off hard decode */
	link->conf.ConfigIndex = 0x03;
	link->io.NumPorts2 = 0;
	i = pcmcia_request_io(link, &link->io);
    }
    dev->base_addr = link->io.BasePort1 + 0x10;
    return i;
}

static int osi_load_firmware(struct pcmcia_device *link)
{
	const struct firmware *fw;
	int i, err;

	err = request_firmware(&fw, FIRMWARE_NAME, &link->dev);
	if (err) {
		pr_err("Failed to load firmware \"%s\"\n", FIRMWARE_NAME);
		return err;
	}

	/* Download the Seven of Diamonds firmware */
	for (i = 0; i < fw->size; i++) {
	    outb(fw->data[i], link->io.BasePort1 + 2);
	    udelay(50);
	}
	release_firmware(fw);
	return err;
}

static int osi_setup(struct pcmcia_device *link, u_short manfid, u_short cardid)
{
    struct net_device *dev = link->priv;
    struct smc_cfg_mem *cfg_mem;
    tuple_t *tuple;
    u_char *buf;
    int i, rc;

    cfg_mem = kmalloc(sizeof(struct smc_cfg_mem), GFP_KERNEL);
    if (!cfg_mem)
        return -1;

    tuple = &cfg_mem->tuple;
    buf = cfg_mem->buf;

    tuple->Attributes = TUPLE_RETURN_COMMON;
    tuple->TupleData = (cisdata_t *)buf;
    tuple->TupleDataMax = 255;
    tuple->TupleOffset = 0;

    /* Read the station address from tuple 0x90, subtuple 0x04 */
    tuple->DesiredTuple = 0x90;
    i = pcmcia_get_first_tuple(link, tuple);
    while (i == 0) {
	i = pcmcia_get_tuple_data(link, tuple);
	if ((i != 0) || (buf[0] == 0x04))
	    break;
	i = pcmcia_get_next_tuple(link, tuple);
    }
    if (i != 0) {
	rc = -1;
	goto free_cfg_mem;
    }
    for (i = 0; i < 6; i++)
	dev->dev_addr[i] = buf[i+2];

    if (((manfid == MANFID_OSITECH) &&
	 (cardid == PRODID_OSITECH_SEVEN)) ||
	((manfid == MANFID_PSION) &&
	 (cardid == PRODID_PSION_NET100))) {
	rc = osi_load_firmware(link);
	if (rc)
		goto free_cfg_mem;
    } else if (manfid == MANFID_OSITECH) {
	/* Make sure both functions are powered up */
	set_bits(0x300, link->io.BasePort1 + OSITECH_AUI_PWR);
	/* Now, turn on the interrupt for both card functions */
	set_bits(0x300, link->io.BasePort1 + OSITECH_RESET_ISR);
	DEBUG(2, "AUI/PWR: %4.4x RESET/ISR: %4.4x\n",
	      inw(link->io.BasePort1 + OSITECH_AUI_PWR),
	      inw(link->io.BasePort1 + OSITECH_RESET_ISR));
    }
    rc = 0;
free_cfg_mem:
   kfree(cfg_mem);
   return rc;
}

static int smc91c92_suspend(struct pcmcia_device *link)
{
	struct net_device *dev = link->priv;

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

	return 0;
}

static int smc91c92_resume(struct pcmcia_device *link)
{
	struct net_device *dev = link->priv;
	struct smc_private *smc = netdev_priv(dev);
	int i;

	if ((smc->manfid == MANFID_MEGAHERTZ) &&
	    (smc->cardid == PRODID_MEGAHERTZ_EM3288))
		mhz_3288_power(link);
	if (smc->manfid == MANFID_MOTOROLA)
		mot_config(link);
	if ((smc->manfid == MANFID_OSITECH) &&
	    (smc->cardid != PRODID_OSITECH_SEVEN)) {
		/* Power up the card and enable interrupts */
		set_bits(0x0300, dev->base_addr-0x10+OSITECH_AUI_PWR);
		set_bits(0x0300, dev->base_addr-0x10+OSITECH_RESET_ISR);
	}
	if (((smc->manfid == MANFID_OSITECH) &&
	     (smc->cardid == PRODID_OSITECH_SEVEN)) ||
	    ((smc->manfid == MANFID_PSION) &&
	     (smc->cardid == PRODID_PSION_NET100))) {
		i = osi_load_firmware(link);
		if (i) {
			pr_err("smc91c92_cs: Failed to load firmware\n");
			return i;
		}
	}
	if (link->open) {
		smc_reset(dev);
		netif_device_attach(dev);
	}

	return 0;
}


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

    This verifies that the chip is some SMC91cXX variant, and returns
    the revision code if successful.  Otherwise, it returns -ENODEV.

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

static int check_sig(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    unsigned int ioaddr = dev->base_addr;
    int width;
    u_short s;

    SMC_SELECT_BANK(1);
    if (inw(ioaddr + BANK_SELECT) >> 8 != 0x33) {
	/* Try powering up the chip */
	outw(0, ioaddr + CONTROL);
	mdelay(55);
    }

    /* Try setting bus width */
    width = (link->io.Attributes1 == IO_DATA_PATH_WIDTH_AUTO);
    s = inb(ioaddr + CONFIG);
    if (width)
	s |= CFG_16BIT;
    else
	s &= ~CFG_16BIT;
    outb(s, ioaddr + CONFIG);

    /* Check Base Address Register to make sure bus width is OK */
    s = inw(ioaddr + BASE_ADDR);
    if ((inw(ioaddr + BANK_SELECT) >> 8 == 0x33) &&
	((s >> 8) != (s & 0xff))) {
	SMC_SELECT_BANK(3);
	s = inw(ioaddr + REVISION);
	return (s & 0xff);
    }

    if (width) {
	    modconf_t mod = {
		    .Attributes = CONF_IO_CHANGE_WIDTH,
	    };
	    printk(KERN_INFO "smc91c92_cs: using 8-bit IO window.\n");

	    smc91c92_suspend(link);
	    pcmcia_modify_configuration(link, &mod);
	    smc91c92_resume(link);
	    return check_sig(link);
    }
    return -ENODEV;
}

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

    smc91c92_config() is scheduled to run after a CARD_INSERTION event
    is received, to configure the PCMCIA socket, and to make the
    ethernet device available to the system.

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

#define CS_EXIT_TEST(ret, svc, label)	\
if (ret != 0) {				\
	cs_error(link, svc, ret);	\
	goto label; 			\
}

static int smc91c92_config(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    struct smc_private *smc = netdev_priv(dev);
    char *name;
    int i, j, rev;
    unsigned int ioaddr;
    u_long mir;

    DEBUG(0, "smc91c92_config(0x%p)\n", link);

    smc->manfid = link->manf_id;
    smc->cardid = link->card_id;

    if ((smc->manfid == MANFID_OSITECH) &&
	(smc->cardid != PRODID_OSITECH_SEVEN)) {
	i = osi_config(link);
    } else if ((smc->manfid == MANFID_MOTOROLA) ||
	       ((smc->manfid == MANFID_MEGAHERTZ) &&
		((smc->cardid == PRODID_MEGAHERTZ_VARIOUS) ||
		 (smc->cardid == PRODID_MEGAHERTZ_EM3288)))) {
	i = mhz_mfc_config(link);
    } else {
	i = smc_config(link);
    }
    CS_EXIT_TEST(i, RequestIO, config_failed);

    i = pcmcia_request_irq(link, &link->irq);
    CS_EXIT_TEST(i, RequestIRQ, config_failed);
    i = pcmcia_request_configuration(link, &link->conf);
    CS_EXIT_TEST(i, RequestConfiguration, config_failed);

    if (smc->manfid == MANFID_MOTOROLA)
	mot_config(link);

    dev->irq = link->irq.AssignedIRQ;

    if ((if_port >= 0) && (if_port <= 2))
	dev->if_port = if_port;
    else
	printk(KERN_NOTICE "smc91c92_cs: invalid if_port requested\n");

    switch (smc->manfid) {
    case MANFID_OSITECH:
    case MANFID_PSION:
	i = osi_setup(link, smc->manfid, smc->cardid); break;
    case MANFID_SMC:
    case MANFID_NEW_MEDIA:
	i = smc_setup(link); break;
    case 0x128: /* For broken Megahertz cards */
    case MANFID_MEGAHERTZ:
	i = mhz_setup(link); break;
    case MANFID_MOTOROLA:
    default: /* get the hw address from EEPROM */
	i = mot_setup(link); break;
    }

    if (i != 0) {
	printk(KERN_NOTICE "smc91c92_cs: Unable to find hardware address.\n");
	goto config_undo;
    }

    smc->duplex = 0;
    smc->rx_ovrn = 0;

    rev = check_sig(link);
    name = "???";
    if (rev > 0)
	switch (rev >> 4) {
	case 3: name = "92"; break;
	case 4: name = ((rev & 15) >= 6) ? "96" : "94"; break;
	case 5: name = "95"; break;
	case 7: name = "100"; break;
	case 8: name = "100-FD"; break;
	case 9: name = "110"; break;
	}

    ioaddr = dev->base_addr;
    if (rev > 0) {
	u_long mcr;
	SMC_SELECT_BANK(0);
	mir = inw(ioaddr + MEMINFO) & 0xff;
	if (mir == 0xff) mir++;
	/* Get scale factor for memory size */
	mcr = ((rev >> 4) > 3) ? inw(ioaddr + MEMCFG) : 0x0200;
	mir *= 128 * (1<<((mcr >> 9) & 7));
	SMC_SELECT_BANK(1);
	smc->cfg = inw(ioaddr + CONFIG) & ~CFG_AUI_SELECT;
	smc->cfg |= CFG_NO_WAIT | CFG_16BIT | CFG_STATIC;
	if (smc->manfid == MANFID_OSITECH)
	    smc->cfg |= CFG_IRQ_SEL_1 | CFG_IRQ_SEL_0;
	if ((rev >> 4) >= 7)
	    smc->cfg |= CFG_MII_SELECT;
    } else
	mir = 0;

    if (smc->cfg & CFG_MII_SELECT) {
	SMC_SELECT_BANK(3);

	for (i = 0; i < 32; i++) {
	    j = mdio_read(dev, i, 1);
	    if ((j != 0) && (j != 0xffff)) break;
	}
	smc->mii_if.phy_id = (i < 32) ? i : -1;

	SMC_SELECT_BANK(0);
    }

    link->dev_node = &smc->node;
    SET_NETDEV_DEV(dev, &handle_to_dev(link));

    if (register_netdev(dev) != 0) {
	printk(KERN_ERR "smc91c92_cs: register_netdev() failed\n");
	link->dev_node = NULL;
	goto config_undo;
    }

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

    printk(KERN_INFO "%s: smc91c%s rev %d: io %#3lx, irq %d, "
	   "hw_addr %pM\n",
	   dev->name, name, (rev & 0x0f), dev->base_addr, dev->irq,
	   dev->dev_addr);

    if (rev > 0) {
	if (mir & 0x3ff)
	    printk(KERN_INFO "  %lu byte", mir);
	else
	    printk(KERN_INFO "  %lu kb", mir>>10);
	printk(" buffer, %s xcvr\n", (smc->cfg & CFG_MII_SELECT) ?
	       "MII" : if_names[dev->if_port]);
    }

    if (smc->cfg & CFG_MII_SELECT) {
	if (smc->mii_if.phy_id != -1) {
	    DEBUG(0, "  MII transceiver at index %d, status %x.\n",
		  smc->mii_if.phy_id, j);
	} else {
    	    printk(KERN_NOTICE "  No MII transceivers found!\n");
	}
    }
    return 0;

config_undo:
    unregister_netdev(dev);
config_failed:			/* CS_EXIT_TEST() calls jump to here... */
    smc91c92_release(link);
    return -ENODEV;
} /* smc91c92_config */

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

    After a card is removed, smc91c92_release() will unregister the net
    device, and release the PCMCIA configuration.  If the device is
    still open, this will be postponed until it is closed.

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

static void smc91c92_release(struct pcmcia_device *link)
{
	DEBUG(0, "smc91c92_release(0x%p)\n", link);
	if (link->win) {
		struct net_device *dev = link->priv;
		struct smc_private *smc = netdev_priv(dev);
		iounmap(smc->base);
	}
	pcmcia_disable_device(link);
}

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

    MII interface support for SMC91cXX based cards
======================================================================*/

#define MDIO_SHIFT_CLK		0x04
#define MDIO_DATA_OUT		0x01
#define MDIO_DIR_WRITE		0x08
#define MDIO_DATA_WRITE0	(MDIO_DIR_WRITE)
#define MDIO_DATA_WRITE1	(MDIO_DIR_WRITE | MDIO_DATA_OUT)
#define MDIO_DATA_READ		0x02

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

static int mdio_read(struct net_device *dev, int phy_id, int loc)
{
    unsigned int addr = dev->base_addr + MGMT;
    u_int cmd = (0x06<<10)|(phy_id<<5)|loc;
    int i, retval = 0;

    mdio_sync(addr);
    for (i = 13; i >= 0; i--) {
	int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
	outb(dat, addr);
	outb(dat | MDIO_SHIFT_CLK, addr);
    }
    for (i = 19; i > 0; i--) {
	outb(0, addr);
	retval = (retval << 1) | ((inb(addr) & MDIO_DATA_READ) != 0);
	outb(MDIO_SHIFT_CLK, addr);
    }
    return (retval>>1) & 0xffff;
}

static void mdio_write(struct net_device *dev, int phy_id, int loc, int value)
{
    unsigned int addr = dev->base_addr + MGMT;
    u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
    int i;

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

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

    The driver core code, most of which should be common with a
    non-PCMCIA implementation.

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

#ifdef PCMCIA_DEBUG
static void smc_dump(struct net_device *dev)
{
    unsigned int ioaddr = dev->base_addr;
    u_short i, w, save;
    save = inw(ioaddr + BANK_SELECT);
    for (w = 0; w < 4; w++) {
	SMC_SELECT_BANK(w);
	printk(KERN_DEBUG "bank %d: ", w);
	for (i = 0; i < 14; i += 2)
	    printk(" %04x", inw(ioaddr + i));
	printk("\n");
    }
    outw(save, ioaddr + BANK_SELECT);
}
#endif

static int smc_open(struct net_device *dev)
{
    struct smc_private *smc = netdev_priv(dev);
    struct pcmcia_device *link = smc->p_dev;

#ifdef PCMCIA_DEBUG
    DEBUG(0, "%s: smc_open(%p), ID/Window %4.4x.\n",
	  dev->name, dev, inw(dev->base_addr + BANK_SELECT));
    if (pc_debug > 1) smc_dump(dev);
#endif

    /* Check that the PCMCIA card is still here. */
    if (!pcmcia_dev_present(link))
	return -ENODEV;
    /* Physical device present signature. */
    if (check_sig(link) < 0) {
	printk("smc91c92_cs: Yikes!  Bad chip signature!\n");
	return -ENODEV;
    }
    link->open++;

    netif_start_queue(dev);
    smc->saved_skb = NULL;
    smc->packets_waiting = 0;

    smc_reset(dev);
    init_timer(&smc->media);
    smc->media.function = &media_check;
    smc->media.data = (u_long) dev;
    smc->media.expires = jiffies + HZ;
    add_timer(&smc->media);

    return 0;
} /* smc_open */

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

static int smc_close(struct net_device *dev)
{
    struct smc_private *smc = netdev_priv(dev);
    struct pcmcia_device *link = smc->p_dev;
    unsigned int ioaddr = dev->base_addr;

    DEBUG(0, "%s: smc_close(), status %4.4x.\n",
	  dev->name, inw(ioaddr + BANK_SELECT));

    netif_stop_queue(dev);

    /* Shut off all interrupts, and turn off the Tx and Rx sections.
       Don't bother to check for chip present. */
    SMC_SELECT_BANK(2);	/* Nominally paranoia, but do no assume... */
    outw(0, ioaddr + INTERRUPT);
    SMC_SELECT_BANK(0);
    mask_bits(0xff00, ioaddr + RCR);
    mask_bits(0xff00, ioaddr + TCR);

    /* Put the chip into power-down mode. */
    SMC_SELECT_BANK(1);
    outw(CTL_POWERDOWN, ioaddr + CONTROL );

    link->open--;
    del_timer_sync(&smc->media);

    return 0;
} /* smc_close */

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

   Transfer a packet to the hardware and trigger the packet send.
   This may be called at either from either the Tx queue code
   or the interrupt handler.

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

static void smc_hardware_send_packet(struct net_device * dev)
{
    struct smc_private *smc = netdev_priv(dev);
    struct sk_buff *skb = smc->saved_skb;
    unsigned int ioaddr = dev->base_addr;
    u_char packet_no;

    if (!skb) {
	printk(KERN_ERR "%s: In XMIT with no packet to send.\n", dev->name);
	return;
    }

    /* There should be a packet slot waiting. */
    packet_no = inw(ioaddr + PNR_ARR) >> 8;
    if (packet_no & 0x80) {
	/* If not, there is a hardware problem!  Likely an ejected card. */
	printk(KERN_WARNING "%s: 91c92 hardware Tx buffer allocation"
	       " failed, status %#2.2x.\n", dev->name, packet_no);
	dev_kfree_skb_irq(skb);
	smc->saved_skb = NULL;
	netif_start_queue(dev);
	return;
    }

    dev->stats.tx_bytes += skb->len;
    /* The card should use the just-allocated buffer. */
    outw(packet_no, ioaddr + PNR_ARR);
    /* point to the beginning of the packet */
    outw(PTR_AUTOINC , ioaddr + POINTER);

    /* Send the packet length (+6 for status, length and ctl byte)
       and the status word (set to zeros). */
    {
	u_char *buf = skb->data;
	u_int length = skb->len; /* The chip will pad to ethernet min. */

	DEBUG(2, "%s: Trying to xmit packet of length %d.\n",
	      dev->name, length);
	
	/* send the packet length: +6 for status word, length, and ctl */
	outw(0, ioaddr + DATA_1);
	outw(length + 6, ioaddr + DATA_1);
	outsw(ioaddr + DATA_1, buf, length >> 1);
	
	/* The odd last byte, if there is one, goes in the control word. */
	outw((length & 1) ? 0x2000 | buf[length-1] : 0, ioaddr + DATA_1);
    }

    /* Enable the Tx interrupts, both Tx (TxErr) and TxEmpty. */
    outw(((IM_TX_INT|IM_TX_EMPTY_INT)<<8) |
	 (inw(ioaddr + INTERRUPT) & 0xff00),
	 ioaddr + INTERRUPT);

    /* The chip does the rest of the work. */
    outw(MC_ENQUEUE , ioaddr + MMU_CMD);

    smc->saved_skb = NULL;
    dev_kfree_skb_irq(skb);
    dev->trans_start = jiffies;
    netif_start_queue(dev);
    return;
}

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

static void smc_tx_timeout(struct net_device *dev)
{
    struct smc_private *smc = netdev_priv(dev);
    unsigned int ioaddr = dev->base_addr;

    printk(KERN_NOTICE "%s: SMC91c92 transmit timed out, "
	   "Tx_status %2.2x status %4.4x.\n",
	   dev->name, inw(ioaddr)&0xff, inw(ioaddr + 2));
    dev->stats.tx_errors++;
    smc_reset(dev);
    dev->trans_start = jiffies;
    smc->saved_skb = NULL;
    netif_wake_queue(dev);
}

static int smc_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
    struct smc_private *smc = netdev_priv(dev);
    unsigned int ioaddr = dev->base_addr;
    u_short num_pages;
    short time_out, ir;
    unsigned long flags;

    netif_stop_queue(dev);

    DEBUG(2, "%s: smc_start_xmit(length = %d) called,"
	  " status %4.4x.\n", dev->name, skb->len, inw(ioaddr + 2));

    if (smc->saved_skb) {
	/* THIS SHOULD NEVER HAPPEN. */
	dev->stats.tx_aborted_errors++;
	printk(KERN_DEBUG "%s: Internal error -- sent packet while busy.\n",
	       dev->name);
	return 1;
    }
    smc->saved_skb = skb;

    num_pages = skb->len >> 8;

    if (num_pages > 7) {
	printk(KERN_ERR "%s: Far too big packet error.\n", dev->name);
	dev_kfree_skb (skb);
	smc->saved_skb = NULL;
	dev->stats.tx_dropped++;
	return 0;		/* Do not re-queue this packet. */
    }
    /* A packet is now waiting. */
    smc->packets_waiting++;

    spin_lock_irqsave(&smc->lock, flags);
    SMC_SELECT_BANK(2);	/* Paranoia, we should always be in window 2 */

    /* need MC_RESET to keep the memory consistent. errata? */
    if (smc->rx_ovrn) {
	outw(MC_RESET, ioaddr + MMU_CMD);
	smc->rx_ovrn = 0;
    }

    /* Allocate the memory; send the packet now if we win. */
    outw(MC_ALLOC | num_pages, ioaddr + MMU_CMD);
    for (time_out = MEMORY_WAIT_TIME; time_out >= 0; time_out--) {
	ir = inw(ioaddr+INTERRUPT);
	if (ir & IM_ALLOC_INT) {
	    /* Acknowledge the interrupt, send the packet. */
	    outw((ir&0xff00) | IM_ALLOC_INT, ioaddr + INTERRUPT);
	    smc_hardware_send_packet(dev);	/* Send the packet now.. */
	    spin_unlock_irqrestore(&smc->lock, flags);
	    return 0;
	}
    }

    /* Otherwise defer until the Tx-space-allocated interrupt. */
    DEBUG(2, "%s: memory allocation deferred.\n", dev->name);
    outw((IM_ALLOC_INT << 8) | (ir & 0xff00), ioaddr + INTERRUPT);
    spin_unlock_irqrestore(&smc->lock, flags);

    return 0;
}

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

    Handle a Tx anomolous event.  Entered while in Window 2.

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

static void smc_tx_err(struct net_device * dev)
{
    struct smc_private *smc = netdev_priv(dev);
    unsigned int ioaddr = dev->base_addr;
    int saved_packet = inw(ioaddr + PNR_ARR) & 0xff;
    int packet_no = inw(ioaddr + FIFO_PORTS) & 0x7f;
    int tx_status;

    /* select this as the packet to read from */
    outw(packet_no, ioaddr + PNR_ARR);

    /* read the first word from this packet */
    outw(PTR_AUTOINC | PTR_READ | 0, ioaddr + POINTER);

    tx_status = inw(ioaddr + DATA_1);

    dev->stats.tx_errors++;
    if (tx_status & TS_LOSTCAR) dev->stats.tx_carrier_errors++;
    if (tx_status & TS_LATCOL)  dev->stats.tx_window_errors++;
    if (tx_status & TS_16COL) {
	dev->stats.tx_aborted_errors++;
	smc->tx_err++;
    }

    if (tx_status & TS_SUCCESS) {
	printk(KERN_NOTICE "%s: Successful packet caused error "
	       "interrupt?\n", dev->name);
    }
    /* re-enable transmit */
    SMC_SELECT_BANK(0);
    outw(inw(ioaddr + TCR) | TCR_ENABLE | smc->duplex, ioaddr + TCR);
    SMC_SELECT_BANK(2);

    outw(MC_FREEPKT, ioaddr + MMU_CMD); 	/* Free the packet memory. */

    /* one less packet waiting for me */
    smc->packets_waiting--;

    outw(saved_packet, ioaddr + PNR_ARR);
    return;
}

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

static void smc_eph_irq(struct net_device *dev)
{
    struct smc_private *smc = netdev_priv(dev);
    unsigned int ioaddr = dev->base_addr;
    u_short card_stats, ephs;

    SMC_SELECT_BANK(0);
    ephs = inw(ioaddr + EPH);
    DEBUG(2, "%s: Ethernet protocol handler interrupt, status"
	  " %4.4x.\n", dev->name, ephs);
    /* Could be a counter roll-over warning: update stats. */
    card_stats = inw(ioaddr + COUNTER);
    /* single collisions */
    dev->stats.collisions += card_stats & 0xF;
    card_stats >>= 4;
    /* multiple collisions */
    dev->stats.collisions += card_stats & 0xF;
#if 0 		/* These are for when linux supports these statistics */
    card_stats >>= 4;			/* deferred */
    card_stats >>= 4;			/* excess deferred */
#endif
    /* If we had a transmit error we must re-enable the transmitter. */
    outw(inw(ioaddr + TCR) | TCR_ENABLE | smc->duplex, ioaddr + TCR);

    /* Clear a link error interrupt. */
    SMC_SELECT_BANK(1);
    outw(CTL_AUTO_RELEASE | 0x0000, ioaddr + CONTROL);
    outw(CTL_AUTO_RELEASE | CTL_TE_ENABLE | CTL_CR_ENABLE,
	 ioaddr + CONTROL);
    SMC_SELECT_BANK(2);
}

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

static irqreturn_t smc_interrupt(int irq, void *dev_id)
{
    struct net_device *dev = dev_id;
    struct smc_private *smc = netdev_priv(dev);
    unsigned int ioaddr;
    u_short saved_bank, saved_pointer, mask, status;
    unsigned int handled = 1;
    char bogus_cnt = INTR_WORK;		/* Work we are willing to do. */

    if (!netif_device_present(dev))
	return IRQ_NONE;

    ioaddr = dev->base_addr;

    DEBUG(3, "%s: SMC91c92 interrupt %d at %#x.\n", dev->name,
	  irq, ioaddr);

    spin_lock(&smc->lock);
    smc->watchdog = 0;
    saved_bank = inw(ioaddr + BANK_SELECT);
    if ((saved_bank & 0xff00) != 0x3300) {
	/* The device does not exist -- the card could be off-line, or
	   maybe it has been ejected. */
	DEBUG(1, "%s: SMC91c92 interrupt %d for non-existent"
	      "/ejected device.\n", dev->name, irq);
	handled = 0;
	goto irq_done;
    }

    SMC_SELECT_BANK(2);
    saved_pointer = inw(ioaddr + POINTER);
    mask = inw(ioaddr + INTERRUPT) >> 8;
    /* clear all interrupts */
    outw(0, ioaddr + INTERRUPT);

    do { /* read the status flag, and mask it */
	status = inw(ioaddr + INTERRUPT) & 0xff;
	DEBUG(3, "%s: Status is %#2.2x (mask %#2.2x).\n", dev->name,
	      status, mask);
	if ((status & mask) == 0) {
	    if (bogus_cnt == INTR_WORK)
		handled = 0;
	    break;
	}
	if (status & IM_RCV_INT) {
	    /* Got a packet(s). */
	    smc_rx(dev);
	}
	if (status & IM_TX_INT) {
	    smc_tx_err(dev);
	    outw(IM_TX_INT, ioaddr + INTERRUPT);
	}
	status &= mask;
	if (status & IM_TX_EMPTY_INT) {
	    outw(IM_TX_EMPTY_INT, ioaddr + INTERRUPT);
	    mask &= ~IM_TX_EMPTY_INT;
	    dev->stats.tx_packets += smc->packets_waiting;
	    smc->packets_waiting = 0;
	}
	if (status & IM_ALLOC_INT) {
	    /* Clear this interrupt so it doesn't happen again */
	    mask &= ~IM_ALLOC_INT;
	
	    smc_hardware_send_packet(dev);
	
	    /* enable xmit interrupts based on this */
	    mask |= (IM_TX_EMPTY_INT | IM_TX_INT);
	
	    /* and let the card send more packets to me */
	    netif_wake_queue(dev);
	}
	if (status & IM_RX_OVRN_INT) {
	    dev->stats.rx_errors++;
	    dev->stats.rx_fifo_errors++;
	    if (smc->duplex)
		smc->rx_ovrn = 1; /* need MC_RESET outside smc_interrupt */
	    outw(IM_RX_OVRN_INT, ioaddr + INTERRUPT);
	}
	if (status & IM_EPH_INT)
	    smc_eph_irq(dev);
    } while (--bogus_cnt);

    DEBUG(3, "  Restoring saved registers mask %2.2x bank %4.4x"
	  " pointer %4.4x.\n", mask, saved_bank, saved_pointer);

    /* restore state register */
    outw((mask<<8), ioaddr + INTERRUPT);
    outw(saved_pointer, ioaddr + POINTER);
    SMC_SELECT_BANK(saved_bank);

    DEBUG(3, "%s: Exiting interrupt IRQ%d.\n", dev->name, irq);

irq_done:

    if ((smc->manfid == MANFID_OSITECH) &&
	(smc->cardid != PRODID_OSITECH_SEVEN)) {
	/* Retrigger interrupt if needed */
	mask_bits(0x00ff, ioaddr-0x10+OSITECH_RESET_ISR);
	set_bits(0x0300, ioaddr-0x10+OSITECH_RESET_ISR);
    }
    if (smc->manfid == MANFID_MOTOROLA) {
	u_char cor;
	cor = readb(smc->base + MOT_UART + CISREG_COR);
	writeb(cor & ~COR_IREQ_ENA, smc->base + MOT_UART + CISREG_COR);
	writeb(cor, smc->base + MOT_UART + CISREG_COR);
	cor = readb(smc->base + MOT_LAN + CISREG_COR);
	writeb(cor & ~COR_IREQ_ENA, smc->base + MOT_LAN + CISREG_COR);
	writeb(cor, smc->base + MOT_LAN + CISREG_COR);
    }
#ifdef DOES_NOT_WORK
    if (smc->base != NULL) { /* Megahertz MFC's */
	readb(smc->base+MEGAHERTZ_ISR);
	readb(smc->base+MEGAHERTZ_ISR);
    }
#endif
    spin_unlock(&smc->lock);
    return IRQ_RETVAL(handled);
}

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

static void smc_rx(struct net_device *dev)
{
    unsigned int ioaddr = dev->base_addr;
    int rx_status;
    int packet_length;	/* Caution: not frame length, rather words
			   to transfer from the chip. */

    /* Assertion: we are in Window 2. */

    if (inw(ioaddr + FIFO_PORTS) & FP_RXEMPTY) {
	printk(KERN_ERR "%s: smc_rx() with nothing on Rx FIFO.\n",
	       dev->name);
	return;
    }

    /*  Reset the read pointer, and read the status and packet length. */
    outw(PTR_READ | PTR_RCV | PTR_AUTOINC, ioaddr + POINTER);
    rx_status = inw(ioaddr + DATA_1);
    packet_length = inw(ioaddr + DATA_1) & 0x07ff;

    DEBUG(2, "%s: Receive status %4.4x length %d.\n",
	  dev->name, rx_status, packet_length);

    if (!(rx_status & RS_ERRORS)) {		
	/* do stuff to make a new packet */
	struct sk_buff *skb;
	
	/* Note: packet_length adds 5 or 6 extra bytes here! */
	skb = dev_alloc_skb(packet_length+2);
	
	if (skb == NULL) {
	    DEBUG(1, "%s: Low memory, packet dropped.\n", dev->name);
	    dev->stats.rx_dropped++;
	    outw(MC_RELEASE, ioaddr + MMU_CMD);
	    return;
	}
	
	packet_length -= (rx_status & RS_ODDFRAME ? 5 : 6);
	skb_reserve(skb, 2);
	insw(ioaddr+DATA_1, skb_put(skb, packet_length),
	     (packet_length+1)>>1);
	skb->protocol = eth_type_trans(skb, dev);
	
	netif_rx(skb);
	dev->last_rx = jiffies;
	dev->stats.rx_packets++;
	dev->stats.rx_bytes += packet_length;
	if (rx_status & RS_MULTICAST)
	    dev->stats.multicast++;
    } else {
	/* error ... */
	dev->stats.rx_errors++;
	
	if (rx_status & RS_ALGNERR)  dev->stats.rx_frame_errors++;
	if (rx_status & (RS_TOOSHORT | RS_TOOLONG))
	    dev->stats.rx_length_errors++;
	if (rx_status & RS_BADCRC)	dev->stats.rx_crc_errors++;
    }
    /* Let the MMU free the memory of this packet. */
    outw(MC_RELEASE, ioaddr + MMU_CMD);

    return;
}

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

    Calculate values for the hardware multicast filter hash table.

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

static void fill_multicast_tbl(int count, struct dev_mc_list *addrs,
			       u_char *multicast_table)
{
    struct dev_mc_list	*mc_addr;

    for (mc_addr = addrs;  mc_addr && count-- > 0;  mc_addr = mc_addr->next) {
	u_int position = ether_crc(6, mc_addr->dmi_addr);
#ifndef final_version		/* Verify multicast address. */
	if ((mc_addr->dmi_addr[0] & 1) == 0)
	    continue;
#endif
	multicast_table[position >> 29] |= 1 << ((position >> 26) & 7);
    }
}

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

    Set the receive mode.

    This routine is used by both the protocol level to notify us of
    promiscuous/multicast mode changes, and by the open/reset code to
    initialize the Rx registers.  We always set the multicast list and
    leave the receiver running.

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

static void set_rx_mode(struct net_device *dev)
{
    unsigned int ioaddr = dev->base_addr;
    struct smc_private *smc = netdev_priv(dev);
    u_int multicast_table[ 2 ] = { 0, };
    unsigned long flags;
    u_short rx_cfg_setting;

    if (dev->flags & IFF_PROMISC) {
	rx_cfg_setting = RxStripCRC | RxEnable | RxPromisc | RxAllMulti;
    } else if (dev->flags & IFF_ALLMULTI)
	rx_cfg_setting = RxStripCRC | RxEnable | RxAllMulti;
    else {
	if (dev->mc_count)  {
	    fill_multicast_tbl(dev->mc_count, dev->mc_list,
			       (u_char *)multicast_table);
	}
	rx_cfg_setting = RxStripCRC | RxEnable;
    }

    /* Load MC table and Rx setting into the chip without interrupts. */
    spin_lock_irqsave(&smc->lock, flags);
    SMC_SELECT_BANK(3);
    outl(multicast_table[0], ioaddr + MULTICAST0);
    outl(multicast_table[1], ioaddr + MULTICAST4);
    SMC_SELECT_BANK(0);
    outw(rx_cfg_setting, ioaddr + RCR);
    SMC_SELECT_BANK(2);
    spin_unlock_irqrestore(&smc->lock, flags);

    return;
}

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

    Senses when a card's config changes. Here, it's coax or TP.

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

static int s9k_config(struct net_device *dev, struct ifmap *map)
{
    struct smc_private *smc = netdev_priv(dev);
    if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
	if (smc->cfg & CFG_MII_SELECT)
	    return -EOPNOTSUPP;
	else if (map->port > 2)
	    return -EINVAL;
	dev->if_port = map->port;
	printk(KERN_INFO "%s: switched to %s port\n",
	       dev->name, if_names[dev->if_port]);
	smc_reset(dev);
    }
    return 0;
}

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

    Reset the chip, reloading every register that might be corrupted.

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

/*
  Set transceiver type, perhaps to something other than what the user
  specified in dev->if_port.
*/
static void smc_set_xcvr(struct net_device *dev, int if_port)
{
    struct smc_private *smc = netdev_priv(dev);
    unsigned int ioaddr = dev->base_addr;
    u_short saved_bank;

    saved_bank = inw(ioaddr + BANK_SELECT);
    SMC_SELECT_BANK(1);
    if (if_port == 2) {
	outw(smc->cfg | CFG_AUI_SELECT, ioaddr + CONFIG);
	if ((smc->manfid == MANFID_OSITECH) &&
	    (smc->cardid != PRODID_OSITECH_SEVEN))
	    set_bits(OSI_AUI_PWR, ioaddr - 0x10 + OSITECH_AUI_PWR);
	smc->media_status = ((dev->if_port == 0) ? 0x0001 : 0x0002);
    } else {
	outw(smc->cfg, ioaddr + CONFIG);
	if ((smc->manfid == MANFID_OSITECH) &&
	    (smc->cardid != PRODID_OSITECH_SEVEN))
	    mask_bits(~OSI_AUI_PWR, ioaddr - 0x10 + OSITECH_AUI_PWR);
	smc->media_status = ((dev->if_port == 0) ? 0x0012 : 0x4001);
    }
    SMC_SELECT_BANK(saved_bank);
}

static void smc_reset(struct net_device *dev)
{
    unsigned int ioaddr = dev->base_addr;
    struct smc_private *smc = netdev_priv(dev);
    int i;

    DEBUG(0, "%s: smc91c92 reset called.\n", dev->name);

    /* The first interaction must be a write to bring the chip out
       of sleep mode. */
    SMC_SELECT_BANK(0);
    /* Reset the chip. */
    outw(RCR_SOFTRESET, ioaddr + RCR);
    udelay(10);

    /* Clear the transmit and receive configuration registers. */
    outw(RCR_CLEAR, ioaddr + RCR);
    outw(TCR_CLEAR, ioaddr + TCR);

    /* Set the Window 1 control, configuration and station addr registers.
       No point in writing the I/O base register ;-> */
    SMC_SELECT_BANK(1);
    /* Automatically release successfully transmitted packets,
       Accept link errors, counter and Tx error interrupts. */
    outw(CTL_AUTO_RELEASE | CTL_TE_ENABLE | CTL_CR_ENABLE,
	 ioaddr + CONTROL);
    smc_set_xcvr(dev, dev->if_port);
    if ((smc->manfid == MANFID_OSITECH) &&
	(smc->cardid != PRODID_OSITECH_SEVEN))
	outw((dev->if_port == 2 ? OSI_AUI_PWR : 0) |
	     (inw(ioaddr-0x10+OSITECH_AUI_PWR) & 0xff00),
	     ioaddr - 0x10 + OSITECH_AUI_PWR);

    /* Fill in the physical address.  The databook is wrong about the order! */
    for (i = 0; i < 6; i += 2)
	outw((dev->dev_addr[i+1]<<8)+dev->dev_addr[i],
	     ioaddr + ADDR0 + i);

    /* Reset the MMU */
    SMC_SELECT_BANK(2);
    outw(MC_RESET, ioaddr + MMU_CMD);
    outw(0, ioaddr + INTERRUPT);

    /* Re-enable the chip. */
    SMC_SELECT_BANK(0);
    outw(((smc->cfg & CFG_MII_SELECT) ? 0 : TCR_MONCSN) |
	 TCR_ENABLE | TCR_PAD_EN | smc->duplex, ioaddr + TCR);
    set_rx_mode(dev);

    if (smc->cfg & CFG_MII_SELECT) {
	SMC_SELECT_BANK(3);

	/* Reset MII */
	mdio_write(dev, smc->mii_if.phy_id, 0, 0x8000);

	/* Advertise 100F, 100H, 10F, 10H */
	mdio_write(dev, smc->mii_if.phy_id, 4, 0x01e1);

	/* Restart MII autonegotiation */
	mdio_write(dev, smc->mii_if.phy_id, 0, 0x0000);
	mdio_write(dev, smc->mii_if.phy_id, 0, 0x1200);
    }

    /* Enable interrupts. */
    SMC_SELECT_BANK(2);
    outw((IM_EPH_INT | IM_RX_OVRN_INT | IM_RCV_INT) << 8,
	 ioaddr + INTERRUPT);
}

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

    Media selection timer routine

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

static void media_check(u_long arg)
{
    struct net_device *dev = (struct net_device *) arg;
    struct smc_private *smc = netdev_priv(dev);
    unsigned int ioaddr = dev->base_addr;
    u_short i, media, saved_bank;
    u_short link;
    unsigned long flags;

    spin_lock_irqsave(&smc->lock, flags);

    saved_bank = inw(ioaddr + BANK_SELECT);

    if (!netif_device_present(dev))
	goto reschedule;

    SMC_SELECT_BANK(2);

    /* need MC_RESET to keep the memory consistent. errata? */
    if (smc->rx_ovrn) {
	outw(MC_RESET, ioaddr + MMU_CMD);
	smc->rx_ovrn = 0;
    }
    i = inw(ioaddr + INTERRUPT);
    SMC_SELECT_BANK(0);
    media = inw(ioaddr + EPH) & EPH_LINK_OK;
    SMC_SELECT_BANK(1);
    media |= (inw(ioaddr + CONFIG) & CFG_AUI_SELECT) ? 2 : 1;

    /* Check for pending interrupt with watchdog flag set: with
       this, we can limp along even if the interrupt is blocked */
    if (smc->watchdog++ && ((i>>8) & i)) {
	if (!smc->fast_poll)
	    printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name);
	smc_interrupt(dev->irq, dev);
	smc->fast_poll = HZ;
    }
    if (smc->fast_poll) {
	smc->fast_poll--;
	smc->media.expires = jiffies + HZ/100;
	add_timer(&smc->media);
	SMC_SELECT_BANK(saved_bank);
	spin_unlock_irqrestore(&smc->lock, flags);
	return;
    }

    if (smc->cfg & CFG_MII_SELECT) {
	if (smc->mii_if.phy_id < 0)
	    goto reschedule;

	SMC_SELECT_BANK(3);
	link = mdio_read(dev, smc->mii_if.phy_id, 1);
	if (!link || (link == 0xffff)) {
  	    printk(KERN_INFO "%s: MII is missing!\n", dev->name);
	    smc->mii_if.phy_id = -1;
	    goto reschedule;
	}

	link &= 0x0004;
	if (link != smc->link_status) {
	    u_short p = mdio_read(dev, smc->mii_if.phy_id, 5);
	    printk(KERN_INFO "%s: %s link beat\n", dev->name,
		(link) ? "found" : "lost");
	    smc->duplex = (((p & 0x0100) || ((p & 0x1c0) == 0x40))
			   ? TCR_FDUPLX : 0);
	    if (link) {
	        printk(KERN_INFO "%s: autonegotiation complete: "
		       "%sbaseT-%cD selected\n", dev->name,
		       ((p & 0x0180) ? "100" : "10"),
		       (smc->duplex ? 'F' : 'H'));
	    }
	    SMC_SELECT_BANK(0);
	    outw(inw(ioaddr + TCR) | smc->duplex, ioaddr + TCR);
	    smc->link_status = link;
	}
	goto reschedule;
    }

    /* Ignore collisions unless we've had no rx's recently */
    if (time_after(jiffies, dev->last_rx + HZ)) {
	if (smc->tx_err || (smc->media_status & EPH_16COL))
	    media |= EPH_16COL;
    }
    smc->tx_err = 0;

    if (media != smc->media_status) {
	if ((media & smc->media_status & 1) &&
	    ((smc->media_status ^ media) & EPH_LINK_OK))
	    printk(KERN_INFO "%s: %s link beat\n", dev->name,
		   (smc->media_status & EPH_LINK_OK ? "lost" : "found"));
	else if ((media & smc->media_status & 2) &&
		 ((smc->media_status ^ media) & EPH_16COL))
	    printk(KERN_INFO "%s: coax cable %s\n", dev->name,
		   (media & EPH_16COL ? "problem" : "ok"));
	if (dev->if_port == 0) {
	    if (media & 1) {
		if (media & EPH_LINK_OK)
		    printk(KERN_INFO "%s: flipped to 10baseT\n",
			   dev->name);
		else
		    smc_set_xcvr(dev, 2);
	    } else {
		if (media & EPH_16COL)
		    smc_set_xcvr(dev, 1);
		else
		    printk(KERN_INFO "%s: flipped to 10base2\n",
			   dev->name);
	    }
	}
	smc->media_status = media;
    }

reschedule:
    smc->media.expires = jiffies + HZ;
    add_timer(&smc->media);
    SMC_SELECT_BANK(saved_bank);
    spin_unlock_irqrestore(&smc->lock, flags);
}

static int smc_link_ok(struct net_device *dev)
{
    unsigned int ioaddr = dev->base_addr;
    struct smc_private *smc = netdev_priv(dev);

    if (smc->cfg & CFG_MII_SELECT) {
	return mii_link_ok(&smc->mii_if);
    } else {
        SMC_SELECT_BANK(0);
	return inw(ioaddr + EPH) & EPH_LINK_OK;
    }
}

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

    ecmd->supported = (SUPPORTED_TP | SUPPORTED_AUI |
	SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full);
		
    SMC_SELECT_BANK(1);
    tmp = inw(ioaddr + CONFIG);
    ecmd->port = (tmp & CFG_AUI_SELECT) ? PORT_AUI : PORT_TP;
    ecmd->transceiver = XCVR_INTERNAL;
    ecmd->speed = SPEED_10;
    ecmd->phy_address = ioaddr + MGMT;

    SMC_SELECT_BANK(0);
    tmp = inw(ioaddr + TCR);
    ecmd->duplex = (tmp & TCR_FDUPLX) ? DUPLEX_FULL : DUPLEX_HALF;

    return 0;
}

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

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

    if (ecmd->port == PORT_AUI)
	smc_set_xcvr(dev, 1);
    else
	smc_set_xcvr(dev, 0);

    SMC_SELECT_BANK(0);
    tmp = inw(ioaddr + TCR);
    if (ecmd->duplex == DUPLEX_FULL)
	tmp |= TCR_FDUPLX;
    else
	tmp &= ~TCR_FDUPLX;
    outw(tmp, ioaddr + TCR);
	
    return 0;
}

static int check_if_running(struct net_device *dev)
{
	if (!netif_running(dev))
		return -EINVAL;
	return 0;
}

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

static int smc_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
{
	struct smc_private *smc = netdev_priv(dev);
	unsigned int ioaddr = dev->base_addr;
	u16 saved_bank = inw(ioaddr + BANK_SELECT);
	int ret;

	spin_lock_irq(&smc->lock);
	SMC_SELECT_BANK(3);
	if (smc->cfg & CFG_MII_SELECT)
		ret = mii_ethtool_gset(&smc->mii_if, ecmd);
	else
		ret = smc_netdev_get_ecmd(dev, ecmd);
	SMC_SELECT_BANK(saved_bank);
	spin_unlock_irq(&smc->lock);
	return ret;
}

static int smc_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
{
	struct smc_private *smc = netdev_priv(dev);
	unsigned int ioaddr = dev->base_addr;
	u16 saved_bank = inw(ioaddr + BANK_SELECT);
	int ret;

	spin_lock_irq(&smc->lock);
	SMC_SELECT_BANK(3);
	if (smc->cfg & CFG_MII_SELECT)
		ret = mii_ethtool_sset(&smc->mii_if, ecmd);
	else
		ret = smc_netdev_set_ecmd(dev, ecmd);
	SMC_SELECT_BANK(saved_bank);
	spin_unlock_irq(&smc->lock);
	return ret;
}

static u32 smc_get_link(struct net_device *dev)
{
	struct smc_private *smc = netdev_priv(dev);
	unsigned int ioaddr = dev->base_addr;
	u16 saved_bank = inw(ioaddr + BANK_SELECT);
	u32 ret;

	spin_lock_irq(&smc->lock);
	SMC_SELECT_BANK(3);
	ret = smc_link_ok(dev);
	SMC_SELECT_BANK(saved_bank);
	spin_unlock_irq(&smc->lock);
	return ret;
}

#ifdef PCMCIA_DEBUG
static u32 smc_get_msglevel(struct net_device *dev)
{
	return pc_debug;
}

static void smc_set_msglevel(struct net_device *dev, u32 val)
{
	pc_debug = val;
}
#endif

static int smc_nway_reset(struct net_device *dev)
{
	struct smc_private *smc = netdev_priv(dev);
	if (smc->cfg & CFG_MII_SELECT) {
		unsigned int ioaddr = dev->base_addr;
		u16 saved_bank = inw(ioaddr + BANK_SELECT);
		int res;

		SMC_SELECT_BANK(3);
		res = mii_nway_restart(&smc->mii_if);
		SMC_SELECT_BANK(saved_bank);

		return res;
	} else
		return -EOPNOTSUPP;
}

static const struct ethtool_ops ethtool_ops = {
	.begin = check_if_running,
	.get_drvinfo = smc_get_drvinfo,
	.get_settings = smc_get_settings,
	.set_settings = smc_set_settings,
	.get_link = smc_get_link,
#ifdef PCMCIA_DEBUG
	.get_msglevel = smc_get_msglevel,
	.set_msglevel = smc_set_msglevel,
#endif
	.nway_reset = smc_nway_reset,
};

static int smc_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
{
	struct smc_private *smc = netdev_priv(dev);
	struct mii_ioctl_data *mii = if_mii(rq);
	int rc = 0;
	u16 saved_bank;
	unsigned int ioaddr = dev->base_addr;

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

	spin_lock_irq(&smc->lock);
	saved_bank = inw(ioaddr + BANK_SELECT);
	SMC_SELECT_BANK(3);
	rc = generic_mii_ioctl(&smc->mii_if, mii, cmd, NULL);
	SMC_SELECT_BANK(saved_bank);
	spin_unlock_irq(&smc->lock);
	return rc;
}

static struct pcmcia_device_id smc91c92_ids[] = {
	PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x0109, 0x0501),
	PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x0140, 0x000a),
	PCMCIA_PFC_DEVICE_PROD_ID123(0, "MEGAHERTZ", "CC/XJEM3288", "DATA/FAX/CELL ETHERNET MODEM", 0xf510db04, 0x04cd2988, 0x46a52d63),
	PCMCIA_PFC_DEVICE_PROD_ID123(0, "MEGAHERTZ", "CC/XJEM3336", "DATA/FAX/CELL ETHERNET MODEM", 0xf510db04, 0x0143b773, 0x46a52d63),
	PCMCIA_PFC_DEVICE_PROD_ID123(0, "MEGAHERTZ", "EM1144T", "PCMCIA MODEM", 0xf510db04, 0x856d66c8, 0xbd6c43ef),
	PCMCIA_PFC_DEVICE_PROD_ID123(0, "MEGAHERTZ", "XJEM1144/CCEM1144", "PCMCIA MODEM", 0xf510db04, 0x52d21e1e, 0xbd6c43ef),
	PCMCIA_PFC_DEVICE_PROD_ID12(0, "Gateway 2000", "XJEM3336", 0xdd9989be, 0x662c394c),
	PCMCIA_PFC_DEVICE_PROD_ID12(0, "MEGAHERTZ", "XJEM1144/CCEM1144", 0xf510db04, 0x52d21e1e),
	PCMCIA_PFC_DEVICE_PROD_ID12(0, "Ositech", "Trumpcard:Jack of Diamonds Modem+Ethernet", 0xc2f80cd, 0x656947b9),
	PCMCIA_PFC_DEVICE_PROD_ID12(0, "Ositech", "Trumpcard:Jack of Hearts Modem+Ethernet", 0xc2f80cd, 0xdc9ba5ed),
	PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x016c, 0x0020),
	PCMCIA_DEVICE_MANF_CARD(0x016c, 0x0023),
	PCMCIA_DEVICE_PROD_ID123("BASICS by New Media Corporation", "Ethernet", "SMC91C94", 0x23c78a9d, 0x00b2e941, 0xcef397fb),
	PCMCIA_DEVICE_PROD_ID12("ARGOSY", "Fast Ethernet PCCard", 0x78f308dc, 0xdcea68bc),
	PCMCIA_DEVICE_PROD_ID12("dit Co., Ltd.", "PC Card-10/100BTX", 0xe59365c8, 0x6a2161d1),
	PCMCIA_DEVICE_PROD_ID12("DYNALINK", "L100C", 0x6a26d1cf, 0xc16ce9c5),
	PCMCIA_DEVICE_PROD_ID12("Farallon", "Farallon Enet", 0x58d93fc4, 0x244734e9),
	PCMCIA_DEVICE_PROD_ID12("Megahertz", "CC10BT/2", 0x33234748, 0x3c95b953),
	PCMCIA_DEVICE_PROD_ID12("MELCO/SMC", "LPC-TX", 0xa2cd8e6d, 0x42da662a),
	PCMCIA_DEVICE_PROD_ID12("Ositech", "Trumpcard:Four of Diamonds Ethernet", 0xc2f80cd, 0xb3466314),
	PCMCIA_DEVICE_PROD_ID12("Ositech", "Trumpcard:Seven of Diamonds Ethernet", 0xc2f80cd, 0x194b650a),
	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "Fast Ethernet PCCard", 0x281f1c5d, 0xdcea68bc),
	PCMCIA_DEVICE_PROD_ID12("Psion", "10Mb Ethernet", 0x4ef00b21, 0x844be9e9),
	PCMCIA_DEVICE_PROD_ID12("SMC", "EtherEZ Ethernet 8020", 0xc4f8b18b, 0x4a0eeb2d),
	/* These conflict with other cards! */
	/* PCMCIA_DEVICE_MANF_CARD(0x0186, 0x0100), */
	/* PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab), */
	PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, smc91c92_ids);

static struct pcmcia_driver smc91c92_cs_driver = {
	.owner		= THIS_MODULE,
	.drv		= {
		.name	= "smc91c92_cs",
	},
	.probe		= smc91c92_probe,
	.remove		= smc91c92_detach,
	.id_table       = smc91c92_ids,
	.suspend	= smc91c92_suspend,
	.resume		= smc91c92_resume,
};

static int __init init_smc91c92_cs(void)
{
	return pcmcia_register_driver(&smc91c92_cs_driver);
}

static void __exit exit_smc91c92_cs(void)
{
	pcmcia_unregister_driver(&smc91c92_cs_driver);
}

module_init(init_smc91c92_cs);
module_exit(exit_smc91c92_cs);