summaryrefslogtreecommitdiff
path: root/drivers/pcmcia/ds.c
blob: bde9b0513d928b5ccb428becf7189ed7bbfdb63f (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
/*
 * ds.c -- 16-bit PCMCIA core support
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * The initial developer of the original code is David A. Hinds
 * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
 * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
 *
 * (C) 1999		David A. Hinds
 * (C) 2003 - 2004	Dominik Brodowski
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/fcntl.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
#include <linux/timer.h>
#include <linux/ioctl.h>
#include <linux/proc_fs.h>
#include <linux/poll.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/delay.h>
#include <linux/kref.h>
#include <linux/workqueue.h>
#include <linux/crc32.h>
#include <linux/firmware.h>

#include <asm/atomic.h>

#define IN_CARD_SERVICES
#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/bulkmem.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <pcmcia/ss.h>

#include "cs_internal.h"

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

/* Module parameters */

MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
MODULE_DESCRIPTION("PCMCIA Driver Services");
MODULE_LICENSE("GPL");

#ifdef DEBUG
static int ds_pc_debug;

module_param_named(pc_debug, ds_pc_debug, int, 0644);

#define ds_dbg(lvl, fmt, arg...) do {				\
	if (ds_pc_debug > (lvl))					\
		printk(KERN_DEBUG "ds: " fmt , ## arg);		\
} while (0)
#else
#define ds_dbg(lvl, fmt, arg...) do { } while (0)
#endif

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

/* Device user information */
#define MAX_EVENTS	32
#define USER_MAGIC	0x7ea4
#define CHECK_USER(u) \
    (((u) == NULL) || ((u)->user_magic != USER_MAGIC))
typedef struct user_info_t {
    u_int		user_magic;
    int			event_head, event_tail;
    event_t		event[MAX_EVENTS];
    struct user_info_t	*next;
    struct pcmcia_bus_socket *socket;
} user_info_t;

/* Socket state information */
struct pcmcia_bus_socket {
	struct kref		refcount;
	struct pcmcia_callback	callback;
	int			state;
	user_info_t		*user;
	wait_queue_head_t	queue;
	struct pcmcia_socket	*parent;

	/* the PCMCIA devices connected to this socket (normally one, more
	 * for multifunction devices: */
	struct list_head	devices_list;
	u8			device_count; /* the number of devices, used
					       * only internally and subject
					       * to incorrectness and change */

	u8			device_add_pending;
	struct work_struct	device_add;
};
static spinlock_t pcmcia_dev_list_lock;

static struct bus_type pcmcia_bus_type;

#define DS_SOCKET_PRESENT		0x01
#define DS_SOCKET_BUSY			0x02
#define DS_SOCKET_REMOVAL_PENDING	0x10
#define DS_SOCKET_DEAD			0x80

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

static int major_dev = -1;

static int unbind_request(struct pcmcia_bus_socket *s);

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

/* code which was in cs.c before */

/* String tables for error messages */

typedef struct lookup_t {
    int key;
    char *msg;
} lookup_t;

static const lookup_t error_table[] = {
    { CS_SUCCESS,		"Operation succeeded" },
    { CS_BAD_ADAPTER,		"Bad adapter" },
    { CS_BAD_ATTRIBUTE, 	"Bad attribute", },
    { CS_BAD_BASE,		"Bad base address" },
    { CS_BAD_EDC,		"Bad EDC" },
    { CS_BAD_IRQ,		"Bad IRQ" },
    { CS_BAD_OFFSET,		"Bad offset" },
    { CS_BAD_PAGE,		"Bad page number" },
    { CS_READ_FAILURE,		"Read failure" },
    { CS_BAD_SIZE,		"Bad size" },
    { CS_BAD_SOCKET,		"Bad socket" },
    { CS_BAD_TYPE,		"Bad type" },
    { CS_BAD_VCC,		"Bad Vcc" },
    { CS_BAD_VPP,		"Bad Vpp" },
    { CS_BAD_WINDOW,		"Bad window" },
    { CS_WRITE_FAILURE,		"Write failure" },
    { CS_NO_CARD,		"No card present" },
    { CS_UNSUPPORTED_FUNCTION,	"Usupported function" },
    { CS_UNSUPPORTED_MODE,	"Unsupported mode" },
    { CS_BAD_SPEED,		"Bad speed" },
    { CS_BUSY,			"Resource busy" },
    { CS_GENERAL_FAILURE,	"General failure" },
    { CS_WRITE_PROTECTED,	"Write protected" },
    { CS_BAD_ARG_LENGTH,	"Bad argument length" },
    { CS_BAD_ARGS,		"Bad arguments" },
    { CS_CONFIGURATION_LOCKED,	"Configuration locked" },
    { CS_IN_USE,		"Resource in use" },
    { CS_NO_MORE_ITEMS,		"No more items" },
    { CS_OUT_OF_RESOURCE,	"Out of resource" },
    { CS_BAD_HANDLE,		"Bad handle" },
    { CS_BAD_TUPLE,		"Bad CIS tuple" }
};


static const lookup_t service_table[] = {
    { AccessConfigurationRegister,	"AccessConfigurationRegister" },
    { AddSocketServices,		"AddSocketServices" },
    { AdjustResourceInfo,		"AdjustResourceInfo" },
    { CheckEraseQueue,			"CheckEraseQueue" },
    { CloseMemory,			"CloseMemory" },
    { DeregisterClient,			"DeregisterClient" },
    { DeregisterEraseQueue,		"DeregisterEraseQueue" },
    { GetCardServicesInfo,		"GetCardServicesInfo" },
    { GetClientInfo,			"GetClientInfo" },
    { GetConfigurationInfo,		"GetConfigurationInfo" },
    { GetEventMask,			"GetEventMask" },
    { GetFirstClient,			"GetFirstClient" },
    { GetFirstRegion,			"GetFirstRegion" },
    { GetFirstTuple,			"GetFirstTuple" },
    { GetNextClient,			"GetNextClient" },
    { GetNextRegion,			"GetNextRegion" },
    { GetNextTuple,			"GetNextTuple" },
    { GetStatus,			"GetStatus" },
    { GetTupleData,			"GetTupleData" },
    { MapMemPage,			"MapMemPage" },
    { ModifyConfiguration,		"ModifyConfiguration" },
    { ModifyWindow,			"ModifyWindow" },
    { OpenMemory,			"OpenMemory" },
    { ParseTuple,			"ParseTuple" },
    { ReadMemory,			"ReadMemory" },
    { RegisterClient,			"RegisterClient" },
    { RegisterEraseQueue,		"RegisterEraseQueue" },
    { RegisterMTD,			"RegisterMTD" },
    { ReleaseConfiguration,		"ReleaseConfiguration" },
    { ReleaseIO,			"ReleaseIO" },
    { ReleaseIRQ,			"ReleaseIRQ" },
    { ReleaseWindow,			"ReleaseWindow" },
    { RequestConfiguration,		"RequestConfiguration" },
    { RequestIO,			"RequestIO" },
    { RequestIRQ,			"RequestIRQ" },
    { RequestSocketMask,		"RequestSocketMask" },
    { RequestWindow,			"RequestWindow" },
    { ResetCard,			"ResetCard" },
    { SetEventMask,			"SetEventMask" },
    { ValidateCIS,			"ValidateCIS" },
    { WriteMemory,			"WriteMemory" },
    { BindDevice,			"BindDevice" },
    { BindMTD,				"BindMTD" },
    { ReportError,			"ReportError" },
    { SuspendCard,			"SuspendCard" },
    { ResumeCard,			"ResumeCard" },
    { EjectCard,			"EjectCard" },
    { InsertCard,			"InsertCard" },
    { ReplaceCIS,			"ReplaceCIS" }
};


static int pcmcia_report_error(client_handle_t handle, error_info_t *err)
{
	int i;
	char *serv;

	if (CHECK_HANDLE(handle))
		printk(KERN_NOTICE);
	else {
		struct pcmcia_device *p_dev = handle_to_pdev(handle);
		printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
	}

	for (i = 0; i < ARRAY_SIZE(service_table); i++)
		if (service_table[i].key == err->func)
			break;
	if (i < ARRAY_SIZE(service_table))
		serv = service_table[i].msg;
	else
		serv = "Unknown service number";

	for (i = 0; i < ARRAY_SIZE(error_table); i++)
		if (error_table[i].key == err->retcode)
			break;
	if (i < ARRAY_SIZE(error_table))
		printk("%s: %s\n", serv, error_table[i].msg);
	else
		printk("%s: Unknown error code %#x\n", serv, err->retcode);

	return CS_SUCCESS;
} /* report_error */

/* end of code which was in cs.c before */

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

void cs_error(client_handle_t handle, int func, int ret)
{
	error_info_t err = { func, ret };
	pcmcia_report_error(handle, &err);
}
EXPORT_SYMBOL(cs_error);

#ifdef CONFIG_PCMCIA_DEBUG


static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
{
	struct pcmcia_device_id *did = p_drv->id_table;
	unsigned int i;
	u32 hash;

	while (did && did->match_flags) {
		for (i=0; i<4; i++) {
			if (!did->prod_id[i])
				continue;

			hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
			if (hash == did->prod_id_hash[i])
				continue;

			printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
			       "product string \"%s\": is 0x%x, should "
			       "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
			       did->prod_id_hash[i], hash);
		}
		did++;
	}

	return;
}

#else
static inline void pcmcia_check_driver(struct pcmcia_driver *p_drv) {
	return;
}
#endif


#ifdef CONFIG_PCMCIA_LOAD_CIS

/**
 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 * @dev - the pcmcia device which needs a CIS override
 * @filename - requested filename in /lib/firmware/cis/
 *
 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 * the one provided by the card is broken. The firmware files reside in
 * /lib/firmware/cis/ in userspace.
 */
static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
{
	struct pcmcia_socket *s = dev->socket;
	const struct firmware *fw;
	char path[20];
	int ret=-ENOMEM;
	cisdump_t *cis;

	if (!filename)
		return -EINVAL;

	ds_dbg(1, "trying to load firmware %s\n", filename);

	if (strlen(filename) > 14)
		return -EINVAL;

	snprintf(path, 20, "%s", filename);

	if (request_firmware(&fw, path, &dev->dev) == 0) {
		if (fw->size >= CISTPL_MAX_CIS_SIZE)
			goto release;

		cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
		if (!cis)
			goto release;

		memset(cis, 0, sizeof(cisdump_t));

		cis->Length = fw->size + 1;
		memcpy(cis->Data, fw->data, fw->size);

		if (!pcmcia_replace_cis(s, cis))
			ret = 0;
	}
 release:
	release_firmware(fw);

	return (ret);
}

#else /* !CONFIG_PCMCIA_LOAD_CIS */

static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
{
	return -ENODEV;
}

#endif


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

static struct pcmcia_driver * get_pcmcia_driver (dev_info_t *dev_info);
static struct pcmcia_bus_socket * get_socket_info_by_nr(unsigned int nr);

static void pcmcia_release_bus_socket(struct kref *refcount)
{
	struct pcmcia_bus_socket *s = container_of(refcount, struct pcmcia_bus_socket, refcount);
	pcmcia_put_socket(s->parent);
	kfree(s);
}

static void pcmcia_put_bus_socket(struct pcmcia_bus_socket *s)
{
	kref_put(&s->refcount, pcmcia_release_bus_socket);
}

static struct pcmcia_bus_socket *pcmcia_get_bus_socket(struct pcmcia_bus_socket *s)
{
	kref_get(&s->refcount);
	return (s);
}

/**
 * pcmcia_register_driver - register a PCMCIA driver with the bus core
 *
 * Registers a PCMCIA driver with the PCMCIA bus core.
 */
static int pcmcia_device_probe(struct device *dev);
static int pcmcia_device_remove(struct device * dev);

int pcmcia_register_driver(struct pcmcia_driver *driver)
{
	if (!driver)
		return -EINVAL;

	pcmcia_check_driver(driver);

	/* initialize common fields */
	driver->drv.bus = &pcmcia_bus_type;
	driver->drv.owner = driver->owner;
	driver->drv.probe = pcmcia_device_probe;
	driver->drv.remove = pcmcia_device_remove;

	return driver_register(&driver->drv);
}
EXPORT_SYMBOL(pcmcia_register_driver);

/**
 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 */
void pcmcia_unregister_driver(struct pcmcia_driver *driver)
{
	driver_unregister(&driver->drv);
}
EXPORT_SYMBOL(pcmcia_unregister_driver);

#ifdef CONFIG_PROC_FS
static struct proc_dir_entry *proc_pccard = NULL;

static int proc_read_drivers_callback(struct device_driver *driver, void *d)
{
	char **p = d;
	struct pcmcia_driver *p_drv = container_of(driver,
						   struct pcmcia_driver, drv);

	*p += sprintf(*p, "%-24.24s 1 %d\n", p_drv->drv.name,
#ifdef CONFIG_MODULE_UNLOAD
		      (p_drv->owner) ? module_refcount(p_drv->owner) : 1
#else
		      1
#endif
	);
	d = (void *) p;

	return 0;
}

static int proc_read_drivers(char *buf, char **start, off_t pos,
			     int count, int *eof, void *data)
{
	char *p = buf;

	bus_for_each_drv(&pcmcia_bus_type, NULL, 
			 (void *) &p, proc_read_drivers_callback);

	return (p - buf);
}
#endif

/* pcmcia_device handling */

static struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
{
	struct device *tmp_dev;
	tmp_dev = get_device(&p_dev->dev);
	if (!tmp_dev)
		return NULL;
	return to_pcmcia_dev(tmp_dev);
}

static void pcmcia_put_dev(struct pcmcia_device *p_dev)
{
	if (p_dev)
		put_device(&p_dev->dev);
}

static void pcmcia_release_dev(struct device *dev)
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
	ds_dbg(1, "releasing dev %p\n", p_dev);
	pcmcia_put_bus_socket(p_dev->socket->pcmcia);
	kfree(p_dev);
}


static int pcmcia_device_probe(struct device * dev)
{
	struct pcmcia_device *p_dev;
	struct pcmcia_driver *p_drv;
	int ret = 0;

	dev = get_device(dev);
	if (!dev)
		return -ENODEV;

	p_dev = to_pcmcia_dev(dev);
	p_drv = to_pcmcia_drv(dev->driver);

	if (!try_module_get(p_drv->owner)) {
		ret = -EINVAL;
		goto put_dev;
	}

	if (p_drv->attach) {
		p_dev->instance = p_drv->attach();
		if ((!p_dev->instance) || (p_dev->client.state & CLIENT_UNBOUND)) {
			printk(KERN_NOTICE "ds: unable to create instance "
			       "of '%s'!\n", p_drv->drv.name);
			ret = -EINVAL;
		}
	}

	if (ret)
		module_put(p_drv->owner);
 put_dev:
	if ((ret) || !(p_drv->attach))
		put_device(dev);
	return (ret);
}


static int pcmcia_device_remove(struct device * dev)
{
	struct pcmcia_device *p_dev;
	struct pcmcia_driver *p_drv;

	/* detach the "instance" */
	p_dev = to_pcmcia_dev(dev);
	p_drv = to_pcmcia_drv(dev->driver);

	if (p_drv) {
		if ((p_drv->detach) && (p_dev->instance)) {
			p_drv->detach(p_dev->instance);
			/* from pcmcia_probe_device */
			put_device(&p_dev->dev);
		}
		module_put(p_drv->owner);
	}

	return 0;
}



/*
 * pcmcia_device_query -- determine information about a pcmcia device
 */
static int pcmcia_device_query(struct pcmcia_device *p_dev)
{
	cistpl_manfid_t manf_id;
	cistpl_funcid_t func_id;
	cistpl_vers_1_t	vers1;
	unsigned int i;

	if (!pccard_read_tuple(p_dev->socket, p_dev->func,
			       CISTPL_MANFID, &manf_id)) {
		p_dev->manf_id = manf_id.manf;
		p_dev->card_id = manf_id.card;
		p_dev->has_manf_id = 1;
		p_dev->has_card_id = 1;
	}

	if (!pccard_read_tuple(p_dev->socket, p_dev->func,
			       CISTPL_FUNCID, &func_id)) {
		p_dev->func_id = func_id.func;
		p_dev->has_func_id = 1;
	} else {
		/* rule of thumb: cards with no FUNCID, but with
		 * common memory device geometry information, are
		 * probably memory cards (from pcmcia-cs) */
		cistpl_device_geo_t devgeo;
		if (!pccard_read_tuple(p_dev->socket, p_dev->func,
				      CISTPL_DEVICE_GEO, &devgeo)) {
			ds_dbg(0, "mem device geometry probably means "
			       "FUNCID_MEMORY\n");
			p_dev->func_id = CISTPL_FUNCID_MEMORY;
			p_dev->has_func_id = 1;
		}
	}

	if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
			       &vers1)) {
		for (i=0; i < vers1.ns; i++) {
			char *tmp;
			unsigned int length;

			tmp = vers1.str + vers1.ofs[i];

			length = strlen(tmp) + 1;
			if ((length < 3) || (length > 255))
				continue;

			p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
						    GFP_KERNEL);
			if (!p_dev->prod_id[i])
				continue;

			p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
						    tmp, length);
		}
	}

	return 0;
}


/* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 * Serializes pcmcia_device_add; will most likely be removed in future.
 *
 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 * won't work, this doesn't matter much at the moment: the driver core doesn't
 * support it either.
 */
static DECLARE_MUTEX(device_add_lock);

static struct pcmcia_device * pcmcia_device_add(struct pcmcia_bus_socket *s, unsigned int function)
{
	struct pcmcia_device *p_dev;
	unsigned long flags;

	s = pcmcia_get_bus_socket(s);
	if (!s)
		return NULL;

	down(&device_add_lock);

	/* max of 2 devices per card */
	if (s->device_count == 2)
		goto err_put;

	p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
	if (!p_dev)
		goto err_put;
	memset(p_dev, 0, sizeof(struct pcmcia_device));

	p_dev->socket = s->parent;
	p_dev->device_no = (s->device_count++);
	p_dev->func   = function;

	p_dev->dev.bus = &pcmcia_bus_type;
	p_dev->dev.parent = s->parent->dev.dev;
	p_dev->dev.release = pcmcia_release_dev;
	sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);

	/* compat */
	p_dev->client.client_magic = CLIENT_MAGIC;
	p_dev->client.Socket = s->parent;
	p_dev->client.Function = function;
	p_dev->client.state = CLIENT_UNBOUND;

	/* Add to the list in pcmcia_bus_socket */
	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
	list_add_tail(&p_dev->socket_device_list, &s->devices_list);
	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);

	pcmcia_device_query(p_dev);

	if (device_register(&p_dev->dev)) {
		spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
		list_del(&p_dev->socket_device_list);
		spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);

		goto err_free;
       }

	up(&device_add_lock);

	return p_dev;

 err_free:
	kfree(p_dev);
	s->device_count--;
 err_put:
	up(&device_add_lock);
	pcmcia_put_bus_socket(s);

	return NULL;
}


static int pcmcia_card_add(struct pcmcia_socket *s)
{
	cisinfo_t cisinfo;
	cistpl_longlink_mfc_t mfc;
	unsigned int no_funcs, i;
	int ret = 0;

	if (!(s->resource_setup_done))
		return -EAGAIN; /* try again, but later... */

	pcmcia_validate_mem(s);
	ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
	if (ret || !cisinfo.Chains) {
		ds_dbg(0, "invalid CIS or invalid resources\n");
		return -ENODEV;
	}

	if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
		no_funcs = mfc.nfn;
	else
		no_funcs = 1;

	/* this doesn't handle multifunction devices on one pcmcia function
	 * yet. */
	for (i=0; i < no_funcs; i++)
		pcmcia_device_add(s->pcmcia, i);

	return (ret);
}


static void pcmcia_delayed_add_pseudo_device(void *data)
{
	struct pcmcia_bus_socket *s = data;
	pcmcia_device_add(s, 0);
	s->device_add_pending = 0;
}

static inline void pcmcia_add_pseudo_device(struct pcmcia_bus_socket *s)
{
	if (!s->device_add_pending) {
		schedule_work(&s->device_add);
		s->device_add_pending = 1;
	}
	return;
}

static int pcmcia_requery(struct device *dev, void * _data)
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
	if (!p_dev->dev.driver)
		pcmcia_device_query(p_dev);

	return 0;
}

static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
{
	int no_devices=0;
	unsigned long flags;

	/* must be called with skt_sem held */
	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
	if (list_empty(&skt->pcmcia->devices_list))
		no_devices=1;
	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);

	/* if no devices were added for this socket yet because of
	 * missing resource information or other trouble, we need to
	 * do this now. */
	if (no_devices) {
		int ret = pcmcia_card_add(skt);
		if (ret)
			return;
	}

	/* some device information might have changed because of a CIS
	 * update or because we can finally read it correctly... so
	 * determine it again, overwriting old values if necessary. */
	bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);

	/* we re-scan all devices, not just the ones connected to this
	 * socket. This does not matter, though. */
	bus_rescan_devices(&pcmcia_bus_type);
}

static inline int pcmcia_devmatch(struct pcmcia_device *dev,
				  struct pcmcia_device_id *did)
{
	if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
		if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
		if ((!dev->has_card_id) || (dev->card_id != did->card_id))
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
		if (dev->func != did->function)
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
		if (!dev->prod_id[0])
			return 0;
		if (strcmp(did->prod_id[0], dev->prod_id[0]))
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
		if (!dev->prod_id[1])
			return 0;
		if (strcmp(did->prod_id[1], dev->prod_id[1]))
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
		if (!dev->prod_id[2])
			return 0;
		if (strcmp(did->prod_id[2], dev->prod_id[2]))
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
		if (!dev->prod_id[3])
			return 0;
		if (strcmp(did->prod_id[3], dev->prod_id[3]))
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
		/* handle pseudo multifunction devices:
		 * there are at most two pseudo multifunction devices.
		 * if we're matching against the first, schedule a
		 * call which will then check whether there are two
		 * pseudo devices, and if not, add the second one.
		 */
		if (dev->device_no == 0)
			pcmcia_add_pseudo_device(dev->socket->pcmcia);

		if (dev->device_no != did->device_no)
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
		if ((!dev->has_func_id) || (dev->func_id != did->func_id))
			return 0;

		/* if this is a pseudo-multi-function device,
		 * we need explicit matches */
		if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
			return 0;
		if (dev->device_no)
			return 0;

		/* also, FUNC_ID matching needs to be activated by userspace
		 * after it has re-checked that there is no possible module
		 * with a prod_id/manf_id/card_id match.
		 */
		if (!dev->allow_func_id_match)
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
		if (!dev->socket->fake_cis)
			pcmcia_load_firmware(dev, did->cisfile);

		if (!dev->socket->fake_cis)
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
		int i;
		for (i=0; i<4; i++)
			if (dev->prod_id[i])
				return 0;
		if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
			return 0;
	}

	dev->dev.driver_data = (void *) did;

	return 1;
}


static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
	struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
	struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
	struct pcmcia_device_id *did = p_drv->id_table;

	/* matching by cardmgr */
	if (p_dev->cardmgr == p_drv)
		return 1;

	while (did && did->match_flags) {
		if (pcmcia_devmatch(p_dev, did))
			return 1;
		did++;
	}

	return 0;
}

#ifdef CONFIG_HOTPLUG

static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
			      char *buffer, int buffer_size)
{
	struct pcmcia_device *p_dev;
	int i, length = 0;
	u32 hash[4] = { 0, 0, 0, 0};

	if (!dev)
		return -ENODEV;

	p_dev = to_pcmcia_dev(dev);

	/* calculate hashes */
	for (i=0; i<4; i++) {
		if (!p_dev->prod_id[i])
			continue;
		hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
	}

	i = 0;

	if (add_hotplug_env_var(envp, num_envp, &i,
				buffer, buffer_size, &length,
				"SOCKET_NO=%u",
				p_dev->socket->sock))
		return -ENOMEM;

	if (add_hotplug_env_var(envp, num_envp, &i,
				buffer, buffer_size, &length,
				"DEVICE_NO=%02X",
				p_dev->device_no))
		return -ENOMEM;

	if (add_hotplug_env_var(envp, num_envp, &i,
				buffer, buffer_size, &length,
				"MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
				"pa%08Xpb%08Xpc%08Xpd%08X",
				p_dev->has_manf_id ? p_dev->manf_id : 0,
				p_dev->has_card_id ? p_dev->card_id : 0,
				p_dev->has_func_id ? p_dev->func_id : 0,
				p_dev->func,
				p_dev->device_no,
				hash[0],
				hash[1],
				hash[2],
				hash[3]))
		return -ENOMEM;

	envp[i] = NULL;

	return 0;
}

#else

static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
			      char *buffer, int buffer_size)
{
	return -ENODEV;
}

#endif

/************************ per-device sysfs output ***************************/

#define pcmcia_device_attr(field, test, format)				\
static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)		\
{									\
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);		\
	return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
}

#define pcmcia_device_stringattr(name, field)					\
static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)		\
{									\
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);		\
	return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
}

pcmcia_device_attr(func, socket, "0x%02x\n");
pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
pcmcia_device_stringattr(prod_id1, prod_id[0]);
pcmcia_device_stringattr(prod_id2, prod_id[1]);
pcmcia_device_stringattr(prod_id3, prod_id[2]);
pcmcia_device_stringattr(prod_id4, prod_id[3]);


static ssize_t pcmcia_store_allow_func_id_match (struct device * dev, struct device_attribute *attr,
						 const char * buf, size_t count)
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
        if (!count)
                return -EINVAL;

	down(&p_dev->socket->skt_sem);
	p_dev->allow_func_id_match = 1;
	up(&p_dev->socket->skt_sem);

	bus_rescan_devices(&pcmcia_bus_type);

	return count;
}

static struct device_attribute pcmcia_dev_attrs[] = {
	__ATTR(function, 0444, func_show, NULL),
	__ATTR_RO(func_id),
	__ATTR_RO(manf_id),
	__ATTR_RO(card_id),
	__ATTR_RO(prod_id1),
	__ATTR_RO(prod_id2),
	__ATTR_RO(prod_id3),
	__ATTR_RO(prod_id4),
	__ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
	__ATTR_NULL,
};


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

    These manage a ring buffer of events pending for one user process
    
======================================================================*/

static int queue_empty(user_info_t *user)
{
    return (user->event_head == user->event_tail);
}

static event_t get_queued_event(user_info_t *user)
{
    user->event_tail = (user->event_tail+1) % MAX_EVENTS;
    return user->event[user->event_tail];
}

static void queue_event(user_info_t *user, event_t event)
{
    user->event_head = (user->event_head+1) % MAX_EVENTS;
    if (user->event_head == user->event_tail)
	user->event_tail = (user->event_tail+1) % MAX_EVENTS;
    user->event[user->event_head] = event;
}

static void handle_event(struct pcmcia_bus_socket *s, event_t event)
{
    user_info_t *user;
    for (user = s->user; user; user = user->next)
	queue_event(user, event);
    wake_up_interruptible(&s->queue);
}


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

    The card status event handler.
    
======================================================================*/

struct send_event_data {
	struct pcmcia_socket *skt;
	event_t event;
	int priority;
};

static int send_event_callback(struct device *dev, void * _data)
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
	struct send_event_data *data = _data;

	/* we get called for all sockets, but may only pass the event
	 * for drivers _on the affected socket_ */
	if (p_dev->socket != data->skt)
		return 0;

	if (p_dev->client.state & (CLIENT_UNBOUND|CLIENT_STALE))
		return 0;

	if (p_dev->client.EventMask & data->event)
		return EVENT(&p_dev->client, data->event, data->priority);

	return 0;
}

static int send_event(struct pcmcia_socket *s, event_t event, int priority)
{
	int ret = 0;
	struct send_event_data private;
	struct pcmcia_bus_socket *skt = pcmcia_get_bus_socket(s->pcmcia);

	if (!skt)
		return 0;

	private.skt = s;
	private.event = event;
	private.priority = priority;

	ret = bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback);

	pcmcia_put_bus_socket(skt);
	return ret;
} /* send_event */


/* Normally, the event is passed to individual drivers after
 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
 * is inversed to maintain historic compatibility.
 */

static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
{
	struct pcmcia_bus_socket *s = skt->pcmcia;
	int ret = 0;

	ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
	       event, priority, s);
    
	switch (event) {

	case CS_EVENT_CARD_REMOVAL:
		s->state &= ~DS_SOCKET_PRESENT;
	    	send_event(skt, event, priority);
		unbind_request(s);
		handle_event(s, event);
		break;
	
	case CS_EVENT_CARD_INSERTION:
		s->state |= DS_SOCKET_PRESENT;
		pcmcia_card_add(skt);
		handle_event(s, event);
		break;

	case CS_EVENT_EJECTION_REQUEST:
		ret = send_event(skt, event, priority);
		break;

	default:
		handle_event(s, event);
		send_event(skt, event, priority);
		break;
    }

    return 0;
} /* ds_event */


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

    bind_request() and bind_device() are merged by now. Register_client()
    is called right at the end of bind_request(), during the driver's
    ->attach() call. Individual descriptions:

    bind_request() connects a socket to a particular client driver.
    It looks up the specified device ID in the list of registered
    drivers, binds it to the socket, and tries to create an instance
    of the device.  unbind_request() deletes a driver instance.
    
    Bind_device() associates a device driver with a particular socket.
    It is normally called by Driver Services after it has identified
    a newly inserted card.  An instance of that driver will then be
    eligible to register as a client of this socket.

    Register_client() uses the dev_info_t handle to match the
    caller with a socket.  The driver must have already been bound
    to a socket with bind_device() -- in fact, bind_device()
    allocates the client structure that will be used.

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

static int bind_request(struct pcmcia_bus_socket *s, bind_info_t *bind_info)
{
	struct pcmcia_driver *p_drv;
	struct pcmcia_device *p_dev;
	int ret = 0;
	unsigned long flags;

	s = pcmcia_get_bus_socket(s);
	if (!s)
		return -EINVAL;

	ds_dbg(2, "bind_request(%d, '%s')\n", s->parent->sock,
	       (char *)bind_info->dev_info);

	p_drv = get_pcmcia_driver(&bind_info->dev_info);
	if (!p_drv) {
		ret = -EINVAL;
		goto err_put;
	}

	if (!try_module_get(p_drv->owner)) {
		ret = -EINVAL;
		goto err_put_driver;
	}

	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
        list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
		if (p_dev->func == bind_info->function) {
			if ((p_dev->dev.driver == &p_drv->drv)) {
				if (p_dev->cardmgr) {
					/* if there's already a device
					 * registered, and it was registered
					 * by userspace before, we need to
					 * return the "instance". */
					spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
					bind_info->instance = p_dev->instance;
					ret = -EBUSY;
					goto err_put_module;
				} else {
					/* the correct driver managed to bind
					 * itself magically to the correct
					 * device. */
					spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
					p_dev->cardmgr = p_drv;
					ret = 0;
					goto err_put_module;
				}
			} else if (!p_dev->dev.driver) {
				/* there's already a device available where
				 * no device has been bound to yet. So we don't
				 * need to register a device! */
				spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
				goto rescan;
			}
		}
	}
	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);

	p_dev = pcmcia_device_add(s, bind_info->function);
	if (!p_dev) {
		ret = -EIO;
		goto err_put_module;
	}

rescan:
	p_dev->cardmgr = p_drv;

	/* if a driver is already running, we can abort */
	if (p_dev->dev.driver)
		goto err_put_module;

	/*
	 * Prevent this racing with a card insertion.
	 */
	down(&s->parent->skt_sem);
	bus_rescan_devices(&pcmcia_bus_type);
	up(&s->parent->skt_sem);

	/* check whether the driver indeed matched. I don't care if this
	 * is racy or not, because it can only happen on cardmgr access
	 * paths...
	 */
	if (!(p_dev->dev.driver == &p_drv->drv))
		p_dev->cardmgr = NULL;

 err_put_module:
	module_put(p_drv->owner);
 err_put_driver:
	put_driver(&p_drv->drv);
 err_put:
	pcmcia_put_bus_socket(s);

	return (ret);
} /* bind_request */


int pcmcia_register_client(client_handle_t *handle, client_reg_t *req)
{
	client_t *client = NULL;
	struct pcmcia_socket *s;
	struct pcmcia_bus_socket *skt = NULL;
	struct pcmcia_device *p_dev = NULL;

	/* Look for unbound client with matching dev_info */
	down_read(&pcmcia_socket_list_rwsem);
	list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
		unsigned long flags;

		if (s->state & SOCKET_CARDBUS)
			continue;

		skt = s->pcmcia;
		if (!skt)
			continue;
		skt = pcmcia_get_bus_socket(skt);
		if (!skt)
			continue;
		spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
		list_for_each_entry(p_dev, &skt->devices_list, socket_device_list) {
			struct pcmcia_driver *p_drv;
			p_dev = pcmcia_get_dev(p_dev);
			if (!p_dev)
				continue;
			if (!(p_dev->client.state & CLIENT_UNBOUND) ||
			    (!p_dev->dev.driver)) {
				pcmcia_put_dev(p_dev);
				continue;
			}
			p_drv = to_pcmcia_drv(p_dev->dev.driver);
			if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) {
				client = &p_dev->client;
				spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
				goto found;
			}
			pcmcia_put_dev(p_dev);
		}
		spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
		pcmcia_put_bus_socket(skt);
	}
 found:
	up_read(&pcmcia_socket_list_rwsem);
	if (!p_dev || !client)
		return -ENODEV;

	pcmcia_put_bus_socket(skt); /* safe, as we already hold a reference from bind_device */

	*handle = client;
	client->state &= ~CLIENT_UNBOUND;
	client->Socket = s;
	client->EventMask = req->EventMask;
	client->event_handler = req->event_handler;
	client->event_callback_args = req->event_callback_args;
	client->event_callback_args.client_handle = client;

	if (s->state & SOCKET_CARDBUS)
		client->state |= CLIENT_CARDBUS;

	if ((!(s->state & SOCKET_CARDBUS)) && (s->functions == 0) &&
	    (client->Function != BIND_FN_ALL)) {
		cistpl_longlink_mfc_t mfc;
		if (pccard_read_tuple(s, client->Function, CISTPL_LONGLINK_MFC, &mfc)
		    == CS_SUCCESS)
			s->functions = mfc.nfn;
		else
			s->functions = 1;
		s->config = kmalloc(sizeof(config_t) * s->functions,
				    GFP_KERNEL);
		if (!s->config)
			goto out_no_resource;
		memset(s->config, 0, sizeof(config_t) * s->functions);
	}

	ds_dbg(1, "register_client(): client 0x%p, dev %s\n",
	       client, p_dev->dev.bus_id);
	if (client->EventMask & CS_EVENT_REGISTRATION_COMPLETE)
		EVENT(client, CS_EVENT_REGISTRATION_COMPLETE, CS_EVENT_PRI_LOW);

	if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
		if (client->EventMask & CS_EVENT_CARD_INSERTION)
			EVENT(client, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
	}

	return CS_SUCCESS;

 out_no_resource:
	pcmcia_put_dev(p_dev);
	return CS_OUT_OF_RESOURCE;
} /* register_client */
EXPORT_SYMBOL(pcmcia_register_client);


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

extern struct pci_bus *pcmcia_lookup_bus(struct pcmcia_socket *s);

static int get_device_info(struct pcmcia_bus_socket *s, bind_info_t *bind_info, int first)
{
	dev_node_t *node;
	struct pcmcia_device *p_dev;
	unsigned long flags;
	int ret = 0;

#ifdef CONFIG_CARDBUS
	/*
	 * Some unbelievably ugly code to associate the PCI cardbus
	 * device and its driver with the PCMCIA "bind" information.
	 */
	{
		struct pci_bus *bus;

		bus = pcmcia_lookup_bus(s->parent);
		if (bus) {
			struct list_head *list;
			struct pci_dev *dev = NULL;

			list = bus->devices.next;
			while (list != &bus->devices) {
				struct pci_dev *pdev = pci_dev_b(list);
				list = list->next;

				if (first) {
					dev = pdev;
					break;
				}

				/* Try to handle "next" here some way? */
			}
			if (dev && dev->driver) {
				strlcpy(bind_info->name, dev->driver->name, DEV_NAME_LEN);
				bind_info->major = 0;
				bind_info->minor = 0;
				bind_info->next = NULL;
				return 0;
			}
		}
	}
#endif

	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
	list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
		if (p_dev->func == bind_info->function) {
			p_dev = pcmcia_get_dev(p_dev);
			if (!p_dev)
				continue;
			goto found;
		}
	}
	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
	return -ENODEV;

 found:
	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);

	if ((!p_dev->instance) ||
	    (p_dev->instance->state & DEV_CONFIG_PENDING)) {
		ret = -EAGAIN;
		goto err_put;
	}

	if (first)
		node = p_dev->instance->dev;
	else
		for (node = p_dev->instance->dev; node; node = node->next)
			if (node == bind_info->next)
				break;
	if (!node) {
		ret = -ENODEV;
		goto err_put;
	}

	strlcpy(bind_info->name, node->dev_name, DEV_NAME_LEN);
	bind_info->major = node->major;
	bind_info->minor = node->minor;
	bind_info->next = node->next;

 err_put:
	pcmcia_put_dev(p_dev);
	return (ret);
} /* get_device_info */

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

/* unbind _all_ devices attached to a given pcmcia_bus_socket. The
 * drivers have been called with EVENT_CARD_REMOVAL before.
 */
static int unbind_request(struct pcmcia_bus_socket *s)
{
	struct pcmcia_device	*p_dev;
	unsigned long		flags;

	ds_dbg(2, "unbind_request(%d)\n", s->parent->sock);

	s->device_count = 0;

	for (;;) {
		/* unregister all pcmcia_devices registered with this socket*/
		spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
		if (list_empty(&s->devices_list)) {
			spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 			return 0;
		}
		p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
		list_del(&p_dev->socket_device_list);
		p_dev->client.state |= CLIENT_STALE;
		spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);

		device_unregister(&p_dev->dev);
	}

	return 0;
} /* unbind_request */

int pcmcia_deregister_client(client_handle_t handle)
{
	struct pcmcia_socket *s;
	int i;
	struct pcmcia_device *p_dev = handle_to_pdev(handle);

	if (CHECK_HANDLE(handle))
		return CS_BAD_HANDLE;

	s = SOCKET(handle);
	ds_dbg(1, "deregister_client(%p)\n", handle);

	if (handle->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
		goto warn_out;
	for (i = 0; i < MAX_WIN; i++)
		if (handle->state & CLIENT_WIN_REQ(i))
			goto warn_out;

	if (handle->state & CLIENT_STALE) {
		handle->client_magic = 0;
		handle->state &= ~CLIENT_STALE;
		pcmcia_put_dev(p_dev);
	} else {
		handle->state = CLIENT_UNBOUND;
		handle->event_handler = NULL;
	}

	return CS_SUCCESS;
 warn_out:
	printk(KERN_WARNING "ds: deregister_client was called too early.\n");
	return CS_IN_USE;
} /* deregister_client */
EXPORT_SYMBOL(pcmcia_deregister_client);


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

    The user-mode PC Card device interface

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

static int ds_open(struct inode *inode, struct file *file)
{
    socket_t i = iminor(inode);
    struct pcmcia_bus_socket *s;
    user_info_t *user;

    ds_dbg(0, "ds_open(socket %d)\n", i);

    s = get_socket_info_by_nr(i);
    if (!s)
	    return -ENODEV;
    s = pcmcia_get_bus_socket(s);
    if (!s)
	    return -ENODEV;

    if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
	    if (s->state & DS_SOCKET_BUSY) {
		    pcmcia_put_bus_socket(s);
		    return -EBUSY;
	    }
	else
	    s->state |= DS_SOCKET_BUSY;
    }
    
    user = kmalloc(sizeof(user_info_t), GFP_KERNEL);
    if (!user) {
	    pcmcia_put_bus_socket(s);
	    return -ENOMEM;
    }
    user->event_tail = user->event_head = 0;
    user->next = s->user;
    user->user_magic = USER_MAGIC;
    user->socket = s;
    s->user = user;
    file->private_data = user;
    
    if (s->state & DS_SOCKET_PRESENT)
	queue_event(user, CS_EVENT_CARD_INSERTION);
    return 0;
} /* ds_open */

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

static int ds_release(struct inode *inode, struct file *file)
{
    struct pcmcia_bus_socket *s;
    user_info_t *user, **link;

    ds_dbg(0, "ds_release(socket %d)\n", iminor(inode));

    user = file->private_data;
    if (CHECK_USER(user))
	goto out;

    s = user->socket;

    /* Unlink user data structure */
    if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
	s->state &= ~DS_SOCKET_BUSY;
    }
    file->private_data = NULL;
    for (link = &s->user; *link; link = &(*link)->next)
	if (*link == user) break;
    if (link == NULL)
	goto out;
    *link = user->next;
    user->user_magic = 0;
    kfree(user);
    pcmcia_put_bus_socket(s);
out:
    return 0;
} /* ds_release */

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

static ssize_t ds_read(struct file *file, char __user *buf,
		       size_t count, loff_t *ppos)
{
    struct pcmcia_bus_socket *s;
    user_info_t *user;
    int ret;

    ds_dbg(2, "ds_read(socket %d)\n", iminor(file->f_dentry->d_inode));
    
    if (count < 4)
	return -EINVAL;

    user = file->private_data;
    if (CHECK_USER(user))
	return -EIO;
    
    s = user->socket;
    if (s->state & DS_SOCKET_DEAD)
        return -EIO;

    ret = wait_event_interruptible(s->queue, !queue_empty(user));
    if (ret == 0)
	ret = put_user(get_queued_event(user), (int __user *)buf) ? -EFAULT : 4;

    return ret;
} /* ds_read */

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

static ssize_t ds_write(struct file *file, const char __user *buf,
			size_t count, loff_t *ppos)
{
    ds_dbg(2, "ds_write(socket %d)\n", iminor(file->f_dentry->d_inode));

    if (count != 4)
	return -EINVAL;
    if ((file->f_flags & O_ACCMODE) == O_RDONLY)
	return -EBADF;

    return -EIO;
} /* ds_write */

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

/* No kernel lock - fine */
static u_int ds_poll(struct file *file, poll_table *wait)
{
    struct pcmcia_bus_socket *s;
    user_info_t *user;

    ds_dbg(2, "ds_poll(socket %d)\n", iminor(file->f_dentry->d_inode));
    
    user = file->private_data;
    if (CHECK_USER(user))
	return POLLERR;
    s = user->socket;
    /*
     * We don't check for a dead socket here since that
     * will send cardmgr into an endless spin.
     */
    poll_wait(file, &s->queue, wait);
    if (!queue_empty(user))
	return POLLIN | POLLRDNORM;
    return 0;
} /* ds_poll */

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

extern int pcmcia_adjust_resource_info(adjust_t *adj);

static int ds_ioctl(struct inode * inode, struct file * file,
		    u_int cmd, u_long arg)
{
    struct pcmcia_bus_socket *s;
    void __user *uarg = (char __user *)arg;
    u_int size;
    int ret, err;
    ds_ioctl_arg_t *buf;
    user_info_t *user;

    ds_dbg(2, "ds_ioctl(socket %d, %#x, %#lx)\n", iminor(inode), cmd, arg);
    
    user = file->private_data;
    if (CHECK_USER(user))
	return -EIO;

    s = user->socket;
    if (s->state & DS_SOCKET_DEAD)
        return -EIO;
    
    size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT;
    if (size > sizeof(ds_ioctl_arg_t)) return -EINVAL;

    /* Permission check */
    if (!(cmd & IOC_OUT) && !capable(CAP_SYS_ADMIN))
	return -EPERM;
	
    if (cmd & IOC_IN) {
	if (!access_ok(VERIFY_READ, uarg, size)) {
	    ds_dbg(3, "ds_ioctl(): verify_read = %d\n", -EFAULT);
	    return -EFAULT;
	}
    }
    if (cmd & IOC_OUT) {
	if (!access_ok(VERIFY_WRITE, uarg, size)) {
	    ds_dbg(3, "ds_ioctl(): verify_write = %d\n", -EFAULT);
	    return -EFAULT;
	}
    }
    buf = kmalloc(sizeof(ds_ioctl_arg_t), GFP_KERNEL);
    if (!buf)
	return -ENOMEM;
    
    err = ret = 0;
    
    if (cmd & IOC_IN) __copy_from_user((char *)buf, uarg, size);
    
    switch (cmd) {
    case DS_ADJUST_RESOURCE_INFO:
	ret = pcmcia_adjust_resource_info(&buf->adjust);
	break;
    case DS_GET_CARD_SERVICES_INFO:
	ret = pcmcia_get_card_services_info(&buf->servinfo);
	break;
    case DS_GET_CONFIGURATION_INFO:
	if (buf->config.Function &&
	   (buf->config.Function >= s->parent->functions))
	    ret = CS_BAD_ARGS;
	else
	    ret = pccard_get_configuration_info(s->parent,
			buf->config.Function, &buf->config);
	break;
    case DS_GET_FIRST_TUPLE:
	down(&s->parent->skt_sem);
	pcmcia_validate_mem(s->parent);
	up(&s->parent->skt_sem);
	ret = pccard_get_first_tuple(s->parent, BIND_FN_ALL, &buf->tuple);
	break;
    case DS_GET_NEXT_TUPLE:
	ret = pccard_get_next_tuple(s->parent, BIND_FN_ALL, &buf->tuple);
	break;
    case DS_GET_TUPLE_DATA:
	buf->tuple.TupleData = buf->tuple_parse.data;
	buf->tuple.TupleDataMax = sizeof(buf->tuple_parse.data);
	ret = pccard_get_tuple_data(s->parent, &buf->tuple);
	break;
    case DS_PARSE_TUPLE:
	buf->tuple.TupleData = buf->tuple_parse.data;
	ret = pccard_parse_tuple(&buf->tuple, &buf->tuple_parse.parse);
	break;
    case DS_RESET_CARD:
	ret = pccard_reset_card(s->parent);
	break;
    case DS_GET_STATUS:
	if (buf->status.Function &&
	   (buf->status.Function >= s->parent->functions))
	    ret = CS_BAD_ARGS;
	else
	ret = pccard_get_status(s->parent, buf->status.Function, &buf->status);
	break;
    case DS_VALIDATE_CIS:
	down(&s->parent->skt_sem);
	pcmcia_validate_mem(s->parent);
	up(&s->parent->skt_sem);
	ret = pccard_validate_cis(s->parent, BIND_FN_ALL, &buf->cisinfo);
	break;
    case DS_SUSPEND_CARD:
	ret = pcmcia_suspend_card(s->parent);
	break;
    case DS_RESUME_CARD:
	ret = pcmcia_resume_card(s->parent);
	break;
    case DS_EJECT_CARD:
	err = pcmcia_eject_card(s->parent);
	break;
    case DS_INSERT_CARD:
	err = pcmcia_insert_card(s->parent);
	break;
    case DS_ACCESS_CONFIGURATION_REGISTER:
	if ((buf->conf_reg.Action == CS_WRITE) && !capable(CAP_SYS_ADMIN)) {
	    err = -EPERM;
	    goto free_out;
	}
	if (buf->conf_reg.Function &&
	   (buf->conf_reg.Function >= s->parent->functions))
	    ret = CS_BAD_ARGS;
	else
	    ret = pccard_access_configuration_register(s->parent,
			buf->conf_reg.Function, &buf->conf_reg);
	break;
    case DS_GET_FIRST_REGION:
    case DS_GET_NEXT_REGION:
    case DS_BIND_MTD:
	if (!capable(CAP_SYS_ADMIN)) {
		err = -EPERM;
		goto free_out;
	} else {
		static int printed = 0;
		if (!printed) {
			printk(KERN_WARNING "2.6. kernels use pcmciamtd instead of memory_cs.c and do not require special\n");
			printk(KERN_WARNING "MTD handling any more.\n");
			printed++;
		}
	}
	err = -EINVAL;
	goto free_out;
	break;
    case DS_GET_FIRST_WINDOW:
	ret = pcmcia_get_window(s->parent, &buf->win_info.handle, 0,
			&buf->win_info.window);
	break;
    case DS_GET_NEXT_WINDOW:
	ret = pcmcia_get_window(s->parent, &buf->win_info.handle,
			buf->win_info.handle->index + 1, &buf->win_info.window);
	break;
    case DS_GET_MEM_PAGE:
	ret = pcmcia_get_mem_page(buf->win_info.handle,
			   &buf->win_info.map);
	break;
    case DS_REPLACE_CIS:
	ret = pcmcia_replace_cis(s->parent, &buf->cisdump);
	break;
    case DS_BIND_REQUEST:
	if (!capable(CAP_SYS_ADMIN)) {
		err = -EPERM;
		goto free_out;
	}
	err = bind_request(s, &buf->bind_info);
	break;
    case DS_GET_DEVICE_INFO:
	err = get_device_info(s, &buf->bind_info, 1);
	break;
    case DS_GET_NEXT_DEVICE:
	err = get_device_info(s, &buf->bind_info, 0);
	break;
    case DS_UNBIND_REQUEST:
	err = 0;
	break;
    default:
	err = -EINVAL;
    }
    
    if ((err == 0) && (ret != CS_SUCCESS)) {
	ds_dbg(2, "ds_ioctl: ret = %d\n", ret);
	switch (ret) {
	case CS_BAD_SOCKET: case CS_NO_CARD:
	    err = -ENODEV; break;
	case CS_BAD_ARGS: case CS_BAD_ATTRIBUTE: case CS_BAD_IRQ:
	case CS_BAD_TUPLE:
	    err = -EINVAL; break;
	case CS_IN_USE:
	    err = -EBUSY; break;
	case CS_OUT_OF_RESOURCE:
	    err = -ENOSPC; break;
	case CS_NO_MORE_ITEMS:
	    err = -ENODATA; break;
	case CS_UNSUPPORTED_FUNCTION:
	    err = -ENOSYS; break;
	default:
	    err = -EIO; break;
	}
    }

    if (cmd & IOC_OUT) {
        if (__copy_to_user(uarg, (char *)buf, size))
            err = -EFAULT;
    }

free_out:
    kfree(buf);
    return err;
} /* ds_ioctl */

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

static struct file_operations ds_fops = {
	.owner		= THIS_MODULE,
	.open		= ds_open,
	.release	= ds_release,
	.ioctl		= ds_ioctl,
	.read		= ds_read,
	.write		= ds_write,
	.poll		= ds_poll,
};

static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev)
{
	struct pcmcia_socket *socket = class_get_devdata(class_dev);
	struct pcmcia_bus_socket *s;
	int ret;

	s = kmalloc(sizeof(struct pcmcia_bus_socket), GFP_KERNEL);
	if(!s)
		return -ENOMEM;
	memset(s, 0, sizeof(struct pcmcia_bus_socket));

	/* get reference to parent socket */
	s->parent = pcmcia_get_socket(socket);
	if (!s->parent) {
		printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
		kfree (s);
		return -ENODEV;
	}

	kref_init(&s->refcount);
    
	/*
	 * Ugly. But we want to wait for the socket threads to have started up.
	 * We really should let the drivers themselves drive some of this..
	 */
	msleep(250);

	init_waitqueue_head(&s->queue);
	INIT_LIST_HEAD(&s->devices_list);
	INIT_WORK(&s->device_add, pcmcia_delayed_add_pseudo_device, s);

	/* Set up hotline to Card Services */
	s->callback.owner = THIS_MODULE;
	s->callback.event = &ds_event;
	s->callback.requery = &pcmcia_bus_rescan;
	socket->pcmcia = s;

	ret = pccard_register_pcmcia(socket, &s->callback);
	if (ret) {
		printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
		pcmcia_put_bus_socket(s);
		socket->pcmcia = NULL;
		return (ret);
	}

	return 0;
}


static void pcmcia_bus_remove_socket(struct class_device *class_dev)
{
	struct pcmcia_socket *socket = class_get_devdata(class_dev);

	if (!socket || !socket->pcmcia)
		return;

	pccard_register_pcmcia(socket, NULL);

	socket->pcmcia->state |= DS_SOCKET_DEAD;
	pcmcia_put_bus_socket(socket->pcmcia);
	socket->pcmcia = NULL;

	return;
}


/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
static struct class_interface pcmcia_bus_interface = {
	.class = &pcmcia_socket_class,
	.add = &pcmcia_bus_add_socket,
	.remove = &pcmcia_bus_remove_socket,
};


static struct bus_type pcmcia_bus_type = {
	.name = "pcmcia",
	.hotplug = pcmcia_bus_hotplug,
	.match = pcmcia_bus_match,
	.dev_attrs = pcmcia_dev_attrs,
};


static int __init init_pcmcia_bus(void)
{
	int i;

	spin_lock_init(&pcmcia_dev_list_lock);

	bus_register(&pcmcia_bus_type);
	class_interface_register(&pcmcia_bus_interface);

	/* Set up character device for user mode clients */
	i = register_chrdev(0, "pcmcia", &ds_fops);
	if (i < 0)
		printk(KERN_NOTICE "unable to find a free device # for "
		       "Driver Services (error=%d)\n", i);
	else
		major_dev = i;

#ifdef CONFIG_PROC_FS
	proc_pccard = proc_mkdir("pccard", proc_bus);
	if (proc_pccard)
		create_proc_read_entry("drivers",0,proc_pccard,proc_read_drivers,NULL);
#endif

	return 0;
}
fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 
			       * pcmcia_socket_class is already registered */


static void __exit exit_pcmcia_bus(void)
{
	class_interface_unregister(&pcmcia_bus_interface);

#ifdef CONFIG_PROC_FS
	if (proc_pccard) {
		remove_proc_entry("drivers", proc_pccard);
		remove_proc_entry("pccard", proc_bus);
	}
#endif
	if (major_dev != -1)
		unregister_chrdev(major_dev, "pcmcia");

	bus_unregister(&pcmcia_bus_type);
}
module_exit(exit_pcmcia_bus);



/* helpers for backwards-compatible functions */

static struct pcmcia_bus_socket * get_socket_info_by_nr(unsigned int nr)
{
	struct pcmcia_socket * s = pcmcia_get_socket_by_nr(nr);
	if (s && s->pcmcia)
		return s->pcmcia;
	else
		return NULL;
}

/* backwards-compatible accessing of driver --- by name! */

static struct pcmcia_driver * get_pcmcia_driver (dev_info_t *dev_info)
{
	struct device_driver *drv;
	struct pcmcia_driver *p_drv;

	drv = driver_find((char *) dev_info, &pcmcia_bus_type);
	if (!drv)
		return NULL;

	p_drv = container_of(drv, struct pcmcia_driver, drv);

	return (p_drv);
}

MODULE_ALIAS("ds");