summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/aha1542.c
blob: 86c6bd234591c7c8af1211f8bc4519c7c33230f7 (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
/* $Id: aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $
 *  linux/kernel/aha1542.c
 *
 *  Copyright (C) 1992  Tommy Thorn
 *  Copyright (C) 1993, 1994, 1995 Eric Youngdale
 *
 *  Modified by Eric Youngdale
 *        Use request_irq and request_dma to help prevent unexpected conflicts
 *        Set up on-board DMA controller, such that we do not have to
 *        have the bios enabled to use the aha1542.
 *  Modified by David Gentzel
 *        Don't call request_dma if dma mask is 0 (for BusLogic BT-445S VL-Bus
 *        controller).
 *  Modified by Matti Aarnio
 *        Accept parameters from LILO cmd-line. -- 1-Oct-94
 *  Modified by Mike McLagan <mike.mclagan@linux.org>
 *        Recognise extended mode on AHA1542CP, different bit than 1542CF
 *        1-Jan-97
 *  Modified by Bjorn L. Thordarson and Einar Thor Einarsson
 *        Recognize that DMA0 is valid DMA channel -- 13-Jul-98
 *  Modified by Chris Faulhaber <jedgar@fxp.org>
 *        Added module command-line options
 *        19-Jul-99
 *  Modified by Adam Fritzler <mid@auk.cx>
 *        Added proper detection of the AHA-1640 (MCA version of AHA-1540)
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <linux/isapnp.h>
#include <linux/blkdev.h>
#include <linux/mca.h>
#include <linux/mca-legacy.h>

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

#include "scsi.h"
#include <scsi/scsi_host.h>
#include "aha1542.h"

#define SCSI_BUF_PA(address)	isa_virt_to_bus(address)
#define SCSI_SG_PA(sgent)	(isa_page_to_bus((sgent)->page) + (sgent)->offset)

static void BAD_DMA(void *address, unsigned int length)
{
	printk(KERN_CRIT "buf vaddress %p paddress 0x%lx length %d\n",
	       address,
	       SCSI_BUF_PA(address),
	       length);
	panic("Buffer at physical address > 16Mb used for aha1542");
}

static void BAD_SG_DMA(Scsi_Cmnd * SCpnt,
		       struct scatterlist *sgpnt,
		       int nseg,
		       int badseg)
{
	printk(KERN_CRIT "sgpnt[%d:%d] page %p/0x%llx length %u\n",
	       badseg, nseg,
	       page_address(sgpnt[badseg].page) + sgpnt[badseg].offset,
	       (unsigned long long)SCSI_SG_PA(&sgpnt[badseg]),
	       sgpnt[badseg].length);

	/*
	 * Not safe to continue.
	 */
	panic("Buffer at physical address > 16Mb used for aha1542");
}

#include<linux/stat.h>

#ifdef DEBUG
#define DEB(x) x
#else
#define DEB(x)
#endif

/*
   static const char RCSid[] = "$Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $";
 */

/* The adaptec can be configured for quite a number of addresses, but
   I generally do not want the card poking around at random.  We allow
   two addresses - this allows people to use the Adaptec with a Midi
   card, which also used 0x330 -- can be overridden with LILO! */

#define MAXBOARDS 4		/* Increase this and the sizes of the
				   arrays below, if you need more.. */

/* Boards 3,4 slots are reserved for ISAPnP/MCA scans */

static unsigned int bases[MAXBOARDS] __initdata = {0x330, 0x334, 0, 0};

/* set by aha1542_setup according to the command line; they also may
   be marked __initdata, but require zero initializers then */

static int setup_called[MAXBOARDS];
static int setup_buson[MAXBOARDS];
static int setup_busoff[MAXBOARDS];
static int setup_dmaspeed[MAXBOARDS] __initdata = { -1, -1, -1, -1 };

/*
 * LILO/Module params:  aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]
 *
 * Where:  <PORTBASE> is any of the valid AHA addresses:
 *                      0x130, 0x134, 0x230, 0x234, 0x330, 0x334
 *         <BUSON>  is the time (in microsecs) that AHA spends on the AT-bus
 *                  when transferring data.  1542A power-on default is 11us,
 *                  valid values are in range: 2..15 (decimal)
 *         <BUSOFF> is the time that AHA spends OFF THE BUS after while
 *                  it is transferring data (not to monopolize the bus).
 *                  Power-on default is 4us, valid range: 1..64 microseconds.
 *         <DMASPEED> Default is jumper selected (1542A: on the J1),
 *                  but experimenter can alter it with this.
 *                  Valid values: 5, 6, 7, 8, 10 (MB/s)
 *                  Factory default is 5 MB/s.
 */

#if defined(MODULE)
static int isapnp = 0;
static int aha1542[] = {0x330, 11, 4, -1};
module_param_array(aha1542, int, NULL, 0);
module_param(isapnp, bool, 0);

static struct isapnp_device_id id_table[] __initdata = {
	{
		ISAPNP_ANY_ID, ISAPNP_ANY_ID,
		ISAPNP_VENDOR('A', 'D', 'P'), ISAPNP_FUNCTION(0x1542),
		0
	},
	{0}
};

MODULE_DEVICE_TABLE(isapnp, id_table);

#else
static int isapnp = 1;
#endif

#define BIOS_TRANSLATION_1632 0	/* Used by some old 1542A boards */
#define BIOS_TRANSLATION_6432 1	/* Default case these days */
#define BIOS_TRANSLATION_25563 2	/* Big disk case */

struct aha1542_hostdata {
	/* This will effectively start both of them at the first mailbox */
	int bios_translation;	/* Mapping bios uses - for compatibility */
	int aha1542_last_mbi_used;
	int aha1542_last_mbo_used;
	Scsi_Cmnd *SCint[AHA1542_MAILBOXES];
	struct mailbox mb[2 * AHA1542_MAILBOXES];
	struct ccb ccb[AHA1542_MAILBOXES];
};

#define HOSTDATA(host) ((struct aha1542_hostdata *) &host->hostdata)

static struct Scsi_Host *aha_host[7];	/* One for each IRQ level (9-15) */

static DEFINE_SPINLOCK(aha1542_lock);



#define WAITnexttimeout 3000000

static void setup_mailboxes(int base_io, struct Scsi_Host *shpnt);
static int aha1542_restart(struct Scsi_Host *shost);
static void aha1542_intr_handle(struct Scsi_Host *shost, void *dev_id, struct pt_regs *regs);
static irqreturn_t do_aha1542_intr_handle(int irq, void *dev_id,
					struct pt_regs *regs);

#define aha1542_intr_reset(base)  outb(IRST, CONTROL(base))

#define WAIT(port, mask, allof, noneof)					\
 { register int WAITbits;						\
   register int WAITtimeout = WAITnexttimeout;				\
   while (1) {								\
     WAITbits = inb(port) & (mask);					\
     if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \
       break;                                                         	\
     if (--WAITtimeout == 0) goto fail;					\
   }									\
 }

/* Similar to WAIT, except we use the udelay call to regulate the
   amount of time we wait.  */
#define WAITd(port, mask, allof, noneof, timeout)			\
 { register int WAITbits;						\
   register int WAITtimeout = timeout;					\
   while (1) {								\
     WAITbits = inb(port) & (mask);					\
     if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \
       break;                                                         	\
     mdelay(1);							\
     if (--WAITtimeout == 0) goto fail;					\
   }									\
 }

static void aha1542_stat(void)
{
/*	int s = inb(STATUS), i = inb(INTRFLAGS);
	printk("status=%x intrflags=%x\n", s, i, WAITnexttimeout-WAITtimeout); */
}

/* This is a bit complicated, but we need to make sure that an interrupt
   routine does not send something out while we are in the middle of this.
   Fortunately, it is only at boot time that multi-byte messages
   are ever sent. */
static int aha1542_out(unsigned int base, unchar * cmdp, int len)
{
	unsigned long flags = 0;
	int got_lock;

	if (len == 1) {
		got_lock = 0;
		while (1 == 1) {
			WAIT(STATUS(base), CDF, 0, CDF);
			spin_lock_irqsave(&aha1542_lock, flags);
			if (inb(STATUS(base)) & CDF) {
				spin_unlock_irqrestore(&aha1542_lock, flags);
				continue;
			}
			outb(*cmdp, DATA(base));
			spin_unlock_irqrestore(&aha1542_lock, flags);
			return 0;
		}
	} else {
		spin_lock_irqsave(&aha1542_lock, flags);
		got_lock = 1;
		while (len--) {
			WAIT(STATUS(base), CDF, 0, CDF);
			outb(*cmdp++, DATA(base));
		}
		spin_unlock_irqrestore(&aha1542_lock, flags);
	}
	return 0;
fail:
	if (got_lock)
		spin_unlock_irqrestore(&aha1542_lock, flags);
	printk(KERN_ERR "aha1542_out failed(%d): ", len + 1);
	aha1542_stat();
	return 1;
}

/* Only used at boot time, so we do not need to worry about latency as much
   here */

static int __init aha1542_in(unsigned int base, unchar * cmdp, int len)
{
	unsigned long flags;

	spin_lock_irqsave(&aha1542_lock, flags);
	while (len--) {
		WAIT(STATUS(base), DF, DF, 0);
		*cmdp++ = inb(DATA(base));
	}
	spin_unlock_irqrestore(&aha1542_lock, flags);
	return 0;
fail:
	spin_unlock_irqrestore(&aha1542_lock, flags);
	printk(KERN_ERR "aha1542_in failed(%d): ", len + 1);
	aha1542_stat();
	return 1;
}

/* Similar to aha1542_in, except that we wait a very short period of time.
   We use this if we know the board is alive and awake, but we are not sure
   if the board will respond to the command we are about to send or not */
static int __init aha1542_in1(unsigned int base, unchar * cmdp, int len)
{
	unsigned long flags;

	spin_lock_irqsave(&aha1542_lock, flags);
	while (len--) {
		WAITd(STATUS(base), DF, DF, 0, 100);
		*cmdp++ = inb(DATA(base));
	}
	spin_unlock_irqrestore(&aha1542_lock, flags);
	return 0;
fail:
	spin_unlock_irqrestore(&aha1542_lock, flags);
	return 1;
}

static int makecode(unsigned hosterr, unsigned scsierr)
{
	switch (hosterr) {
	case 0x0:
	case 0xa:		/* Linked command complete without error and linked normally */
	case 0xb:		/* Linked command complete without error, interrupt generated */
		hosterr = 0;
		break;

	case 0x11:		/* Selection time out-The initiator selection or target
				   reselection was not complete within the SCSI Time out period */
		hosterr = DID_TIME_OUT;
		break;

	case 0x12:		/* Data overrun/underrun-The target attempted to transfer more data
				   than was allocated by the Data Length field or the sum of the
				   Scatter / Gather Data Length fields. */

	case 0x13:		/* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */

	case 0x15:		/* MBO command was not 00, 01 or 02-The first byte of the CB was
				   invalid. This usually indicates a software failure. */

	case 0x16:		/* Invalid CCB Operation Code-The first byte of the CCB was invalid.
				   This usually indicates a software failure. */

	case 0x17:		/* Linked CCB does not have the same LUN-A subsequent CCB of a set
				   of linked CCB's does not specify the same logical unit number as
				   the first. */
	case 0x18:		/* Invalid Target Direction received from Host-The direction of a
				   Target Mode CCB was invalid. */

	case 0x19:		/* Duplicate CCB Received in Target Mode-More than once CCB was
				   received to service data transfer between the same target LUN
				   and initiator SCSI ID in the same direction. */

	case 0x1a:		/* Invalid CCB or Segment List Parameter-A segment list with a zero
				   length segment or invalid segment list boundaries was received.
				   A CCB parameter was invalid. */
		DEB(printk("Aha1542: %x %x\n", hosterr, scsierr));
		hosterr = DID_ERROR;	/* Couldn't find any better */
		break;

	case 0x14:		/* Target bus phase sequence failure-An invalid bus phase or bus
				   phase sequence was requested by the target. The host adapter
				   will generate a SCSI Reset Condition, notifying the host with
				   a SCRD interrupt */
		hosterr = DID_RESET;
		break;
	default:
		printk(KERN_ERR "aha1542: makecode: unknown hoststatus %x\n", hosterr);
		break;
	}
	return scsierr | (hosterr << 16);
}

static int __init aha1542_test_port(int bse, struct Scsi_Host *shpnt)
{
	unchar inquiry_cmd[] = {CMD_INQUIRY};
	unchar inquiry_result[4];
	unchar *cmdp;
	int len;
	volatile int debug = 0;

	/* Quick and dirty test for presence of the card. */
	if (inb(STATUS(bse)) == 0xff)
		return 0;

	/* Reset the adapter. I ought to make a hard reset, but it's not really necessary */

	/*  DEB(printk("aha1542_test_port called \n")); */

	/* In case some other card was probing here, reset interrupts */
	aha1542_intr_reset(bse);	/* reset interrupts, so they don't block */

	outb(SRST | IRST /*|SCRST */ , CONTROL(bse));

	mdelay(20);		/* Wait a little bit for things to settle down. */

	debug = 1;
	/* Expect INIT and IDLE, any of the others are bad */
	WAIT(STATUS(bse), STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);

	debug = 2;
	/* Shouldn't have generated any interrupts during reset */
	if (inb(INTRFLAGS(bse)) & INTRMASK)
		goto fail;


	/* Perform a host adapter inquiry instead so we do not need to set
	   up the mailboxes ahead of time */

	aha1542_out(bse, inquiry_cmd, 1);

	debug = 3;
	len = 4;
	cmdp = &inquiry_result[0];

	while (len--) {
		WAIT(STATUS(bse), DF, DF, 0);
		*cmdp++ = inb(DATA(bse));
	}

	debug = 8;
	/* Reading port should reset DF */
	if (inb(STATUS(bse)) & DF)
		goto fail;

	debug = 9;
	/* When HACC, command is completed, and we're though testing */
	WAIT(INTRFLAGS(bse), HACC, HACC, 0);
	/* now initialize adapter */

	debug = 10;
	/* Clear interrupts */
	outb(IRST, CONTROL(bse));

	debug = 11;

	return debug;		/* 1 = ok */
fail:
	return 0;		/* 0 = not ok */
}

/* A quick wrapper for do_aha1542_intr_handle to grab the spin lock */
static irqreturn_t do_aha1542_intr_handle(int irq, void *dev_id,
					struct pt_regs *regs)
{
	unsigned long flags;
	struct Scsi_Host *shost;

	shost = aha_host[irq - 9];
	if (!shost)
		panic("Splunge!");

	spin_lock_irqsave(shost->host_lock, flags);
	aha1542_intr_handle(shost, dev_id, regs);
	spin_unlock_irqrestore(shost->host_lock, flags);
	return IRQ_HANDLED;
}

/* A "high" level interrupt handler */
static void aha1542_intr_handle(struct Scsi_Host *shost, void *dev_id, struct pt_regs *regs)
{
	void (*my_done) (Scsi_Cmnd *) = NULL;
	int errstatus, mbi, mbo, mbistatus;
	int number_serviced;
	unsigned long flags;
	Scsi_Cmnd *SCtmp;
	int flag;
	int needs_restart;
	struct mailbox *mb;
	struct ccb *ccb;

	mb = HOSTDATA(shost)->mb;
	ccb = HOSTDATA(shost)->ccb;

#ifdef DEBUG
	{
		flag = inb(INTRFLAGS(shost->io_port));
		printk(KERN_DEBUG "aha1542_intr_handle: ");
		if (!(flag & ANYINTR))
			printk("no interrupt?");
		if (flag & MBIF)
			printk("MBIF ");
		if (flag & MBOA)
			printk("MBOF ");
		if (flag & HACC)
			printk("HACC ");
		if (flag & SCRD)
			printk("SCRD ");
		printk("status %02x\n", inb(STATUS(shost->io_port)));
	};
#endif
	number_serviced = 0;
	needs_restart = 0;

	while (1 == 1) {
		flag = inb(INTRFLAGS(shost->io_port));

		/* Check for unusual interrupts.  If any of these happen, we should
		   probably do something special, but for now just printing a message
		   is sufficient.  A SCSI reset detected is something that we really
		   need to deal with in some way. */
		if (flag & ~MBIF) {
			if (flag & MBOA)
				printk("MBOF ");
			if (flag & HACC)
				printk("HACC ");
			if (flag & SCRD) {
				needs_restart = 1;
				printk("SCRD ");
			}
		}
		aha1542_intr_reset(shost->io_port);

		spin_lock_irqsave(&aha1542_lock, flags);
		mbi = HOSTDATA(shost)->aha1542_last_mbi_used + 1;
		if (mbi >= 2 * AHA1542_MAILBOXES)
			mbi = AHA1542_MAILBOXES;

		do {
			if (mb[mbi].status != 0)
				break;
			mbi++;
			if (mbi >= 2 * AHA1542_MAILBOXES)
				mbi = AHA1542_MAILBOXES;
		} while (mbi != HOSTDATA(shost)->aha1542_last_mbi_used);

		if (mb[mbi].status == 0) {
			spin_unlock_irqrestore(&aha1542_lock, flags);
			/* Hmm, no mail.  Must have read it the last time around */
			if (!number_serviced && !needs_restart)
				printk(KERN_WARNING "aha1542.c: interrupt received, but no mail.\n");
			/* We detected a reset.  Restart all pending commands for
			   devices that use the hard reset option */
			if (needs_restart)
				aha1542_restart(shost);
			return;
		};

		mbo = (scsi2int(mb[mbi].ccbptr) - (SCSI_BUF_PA(&ccb[0]))) / sizeof(struct ccb);
		mbistatus = mb[mbi].status;
		mb[mbi].status = 0;
		HOSTDATA(shost)->aha1542_last_mbi_used = mbi;
		spin_unlock_irqrestore(&aha1542_lock, flags);

#ifdef DEBUG
		{
			if (ccb[mbo].tarstat | ccb[mbo].hastat)
				printk(KERN_DEBUG "aha1542_command: returning %x (status %d)\n",
				       ccb[mbo].tarstat + ((int) ccb[mbo].hastat << 16), mb[mbi].status);
		};
#endif

		if (mbistatus == 3)
			continue;	/* Aborted command not found */

#ifdef DEBUG
		printk(KERN_DEBUG "...done %d %d\n", mbo, mbi);
#endif

		SCtmp = HOSTDATA(shost)->SCint[mbo];

		if (!SCtmp || !SCtmp->scsi_done) {
			printk(KERN_WARNING "aha1542_intr_handle: Unexpected interrupt\n");
			printk(KERN_WARNING "tarstat=%x, hastat=%x idlun=%x ccb#=%d \n", ccb[mbo].tarstat,
			       ccb[mbo].hastat, ccb[mbo].idlun, mbo);
			return;
		}
		my_done = SCtmp->scsi_done;
		kfree(SCtmp->host_scribble);
		SCtmp->host_scribble = NULL;
		/* Fetch the sense data, and tuck it away, in the required slot.  The
		   Adaptec automatically fetches it, and there is no guarantee that
		   we will still have it in the cdb when we come back */
		if (ccb[mbo].tarstat == 2)
			memcpy(SCtmp->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen],
			       sizeof(SCtmp->sense_buffer));


		/* is there mail :-) */

		/* more error checking left out here */
		if (mbistatus != 1)
			/* This is surely wrong, but I don't know what's right */
			errstatus = makecode(ccb[mbo].hastat, ccb[mbo].tarstat);
		else
			errstatus = 0;

#ifdef DEBUG
		if (errstatus)
			printk(KERN_DEBUG "(aha1542 error:%x %x %x) ", errstatus,
			       ccb[mbo].hastat, ccb[mbo].tarstat);
#endif

		if (ccb[mbo].tarstat == 2) {
#ifdef DEBUG
			int i;
#endif
			DEB(printk("aha1542_intr_handle: sense:"));
#ifdef DEBUG
			for (i = 0; i < 12; i++)
				printk("%02x ", ccb[mbo].cdb[ccb[mbo].cdblen + i]);
			printk("\n");
#endif
			/*
			   DEB(printk("aha1542_intr_handle: buf:"));
			   for (i = 0; i < bufflen; i++)
			   printk("%02x ", ((unchar *)buff)[i]);
			   printk("\n");
			 */
		}
		DEB(if (errstatus) printk("aha1542_intr_handle: returning %6x\n", errstatus));
		SCtmp->result = errstatus;
		HOSTDATA(shost)->SCint[mbo] = NULL;	/* This effectively frees up the mailbox slot, as
							   far as queuecommand is concerned */
		my_done(SCtmp);
		number_serviced++;
	};
}

static int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
{
	unchar ahacmd = CMD_START_SCSI;
	unchar direction;
	unchar *cmd = (unchar *) SCpnt->cmnd;
	unchar target = SCpnt->device->id;
	unchar lun = SCpnt->device->lun;
	unsigned long flags;
	void *buff = SCpnt->request_buffer;
	int bufflen = SCpnt->request_bufflen;
	int mbo;
	struct mailbox *mb;
	struct ccb *ccb;

	DEB(int i);

	mb = HOSTDATA(SCpnt->device->host)->mb;
	ccb = HOSTDATA(SCpnt->device->host)->ccb;

	DEB(if (target > 1) {
	    SCpnt->result = DID_TIME_OUT << 16;
	    done(SCpnt); return 0;
	    }
	);

	if (*cmd == REQUEST_SENSE) {
		/* Don't do the command - we have the sense data already */
#if 0
		/* scsi_request_sense() provides a buffer of size 256,
		   so there is no reason to expect equality */
		if (bufflen != sizeof(SCpnt->sense_buffer))
			printk(KERN_CRIT "aha1542: Wrong buffer length supplied "
			       "for request sense (%d)\n", bufflen);
#endif
		SCpnt->result = 0;
		done(SCpnt);
		return 0;
	}
#ifdef DEBUG
	if (*cmd == READ_10 || *cmd == WRITE_10)
		i = xscsi2int(cmd + 2);
	else if (*cmd == READ_6 || *cmd == WRITE_6)
		i = scsi2int(cmd + 2);
	else
		i = -1;
	if (done)
		printk(KERN_DEBUG "aha1542_queuecommand: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
	else
		printk(KERN_DEBUG "aha1542_command: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
	aha1542_stat();
	printk(KERN_DEBUG "aha1542_queuecommand: dumping scsi cmd:");
	for (i = 0; i < SCpnt->cmd_len; i++)
		printk("%02x ", cmd[i]);
	printk("\n");
	if (*cmd == WRITE_10 || *cmd == WRITE_6)
		return 0;	/* we are still testing, so *don't* write */
#endif
	/* Use the outgoing mailboxes in a round-robin fashion, because this
	   is how the host adapter will scan for them */

	spin_lock_irqsave(&aha1542_lock, flags);
	mbo = HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used + 1;
	if (mbo >= AHA1542_MAILBOXES)
		mbo = 0;

	do {
		if (mb[mbo].status == 0 && HOSTDATA(SCpnt->device->host)->SCint[mbo] == NULL)
			break;
		mbo++;
		if (mbo >= AHA1542_MAILBOXES)
			mbo = 0;
	} while (mbo != HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used);

	if (mb[mbo].status || HOSTDATA(SCpnt->device->host)->SCint[mbo])
		panic("Unable to find empty mailbox for aha1542.\n");

	HOSTDATA(SCpnt->device->host)->SCint[mbo] = SCpnt;	/* This will effectively prevent someone else from
							   screwing with this cdb. */

	HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used = mbo;
	spin_unlock_irqrestore(&aha1542_lock, flags);

#ifdef DEBUG
	printk(KERN_DEBUG "Sending command (%d %x)...", mbo, done);
#endif

	any2scsi(mb[mbo].ccbptr, SCSI_BUF_PA(&ccb[mbo]));	/* This gets trashed for some reason */

	memset(&ccb[mbo], 0, sizeof(struct ccb));

	ccb[mbo].cdblen = SCpnt->cmd_len;

	direction = 0;
	if (*cmd == READ_10 || *cmd == READ_6)
		direction = 8;
	else if (*cmd == WRITE_10 || *cmd == WRITE_6)
		direction = 16;

	memcpy(ccb[mbo].cdb, cmd, ccb[mbo].cdblen);

	if (SCpnt->use_sg) {
		struct scatterlist *sgpnt;
		struct chain *cptr;
#ifdef DEBUG
		unsigned char *ptr;
#endif
		int i;
		ccb[mbo].op = 2;	/* SCSI Initiator Command  w/scatter-gather */
		SCpnt->host_scribble = (unsigned char *) kmalloc(512, GFP_KERNEL | GFP_DMA);
		sgpnt = (struct scatterlist *) SCpnt->request_buffer;
		cptr = (struct chain *) SCpnt->host_scribble;
		if (cptr == NULL) {
			/* free the claimed mailbox slot */
			HOSTDATA(SCpnt->device->host)->SCint[mbo] = NULL;
			return SCSI_MLQUEUE_HOST_BUSY;
		}
		for (i = 0; i < SCpnt->use_sg; i++) {
			if (sgpnt[i].length == 0 || SCpnt->use_sg > 16 ||
			    (((int) sgpnt[i].offset) & 1) || (sgpnt[i].length & 1)) {
				unsigned char *ptr;
				printk(KERN_CRIT "Bad segment list supplied to aha1542.c (%d, %d)\n", SCpnt->use_sg, i);
				for (i = 0; i < SCpnt->use_sg; i++) {
					printk(KERN_CRIT "%d: %p %d\n", i,
					       (page_address(sgpnt[i].page) +
						sgpnt[i].offset),
					       sgpnt[i].length);
				};
				printk(KERN_CRIT "cptr %x: ", (unsigned int) cptr);
				ptr = (unsigned char *) &cptr[i];
				for (i = 0; i < 18; i++)
					printk("%02x ", ptr[i]);
				panic("Foooooooood fight!");
			};
			any2scsi(cptr[i].dataptr, SCSI_SG_PA(&sgpnt[i]));
			if (SCSI_SG_PA(&sgpnt[i]) + sgpnt[i].length - 1 > ISA_DMA_THRESHOLD)
				BAD_SG_DMA(SCpnt, sgpnt, SCpnt->use_sg, i);
			any2scsi(cptr[i].datalen, sgpnt[i].length);
		};
		any2scsi(ccb[mbo].datalen, SCpnt->use_sg * sizeof(struct chain));
		any2scsi(ccb[mbo].dataptr, SCSI_BUF_PA(cptr));
#ifdef DEBUG
		printk("cptr %x: ", cptr);
		ptr = (unsigned char *) cptr;
		for (i = 0; i < 18; i++)
			printk("%02x ", ptr[i]);
#endif
	} else {
		ccb[mbo].op = 0;	/* SCSI Initiator Command */
		SCpnt->host_scribble = NULL;
		any2scsi(ccb[mbo].datalen, bufflen);
		if (buff && SCSI_BUF_PA(buff + bufflen - 1) > ISA_DMA_THRESHOLD)
			BAD_DMA(buff, bufflen);
		any2scsi(ccb[mbo].dataptr, SCSI_BUF_PA(buff));
	};
	ccb[mbo].idlun = (target & 7) << 5 | direction | (lun & 7);	/*SCSI Target Id */
	ccb[mbo].rsalen = 16;
	ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
	ccb[mbo].commlinkid = 0;

#ifdef DEBUG
	{
		int i;
		printk(KERN_DEBUG "aha1542_command: sending.. ");
		for (i = 0; i < sizeof(ccb[mbo]) - 10; i++)
			printk("%02x ", ((unchar *) & ccb[mbo])[i]);
	};
#endif

	if (done) {
		DEB(printk("aha1542_queuecommand: now waiting for interrupt ");
		    aha1542_stat());
		SCpnt->scsi_done = done;
		mb[mbo].status = 1;
		aha1542_out(SCpnt->device->host->io_port, &ahacmd, 1);	/* start scsi command */
		DEB(aha1542_stat());
	} else
		printk("aha1542_queuecommand: done can't be NULL\n");

	return 0;
}

/* Initialize mailboxes */
static void setup_mailboxes(int bse, struct Scsi_Host *shpnt)
{
	int i;
	struct mailbox *mb;
	struct ccb *ccb;

	unchar cmd[5] = { CMD_MBINIT, AHA1542_MAILBOXES, 0, 0, 0};

	mb = HOSTDATA(shpnt)->mb;
	ccb = HOSTDATA(shpnt)->ccb;

	for (i = 0; i < AHA1542_MAILBOXES; i++) {
		mb[i].status = mb[AHA1542_MAILBOXES + i].status = 0;
		any2scsi(mb[i].ccbptr, SCSI_BUF_PA(&ccb[i]));
	};
	aha1542_intr_reset(bse);	/* reset interrupts, so they don't block */
	any2scsi((cmd + 2), SCSI_BUF_PA(mb));
	aha1542_out(bse, cmd, 5);
	WAIT(INTRFLAGS(bse), INTRMASK, HACC, 0);
	while (0) {
fail:
		printk(KERN_ERR "aha1542_detect: failed setting up mailboxes\n");
	}
	aha1542_intr_reset(bse);
}

static int __init aha1542_getconfig(int base_io, unsigned char *irq_level, unsigned char *dma_chan, unsigned char *scsi_id)
{
	unchar inquiry_cmd[] = {CMD_RETCONF};
	unchar inquiry_result[3];
	int i;
	i = inb(STATUS(base_io));
	if (i & DF) {
		i = inb(DATA(base_io));
	};
	aha1542_out(base_io, inquiry_cmd, 1);
	aha1542_in(base_io, inquiry_result, 3);
	WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
	while (0) {
fail:
		printk(KERN_ERR "aha1542_detect: query board settings\n");
	}
	aha1542_intr_reset(base_io);
	switch (inquiry_result[0]) {
	case 0x80:
		*dma_chan = 7;
		break;
	case 0x40:
		*dma_chan = 6;
		break;
	case 0x20:
		*dma_chan = 5;
		break;
	case 0x01:
		*dma_chan = 0;
		break;
	case 0:
		/* This means that the adapter, although Adaptec 1542 compatible, doesn't use a DMA channel.
		   Currently only aware of the BusLogic BT-445S VL-Bus adapter which needs this. */
		*dma_chan = 0xFF;
		break;
	default:
		printk(KERN_ERR "Unable to determine Adaptec DMA priority.  Disabling board\n");
		return -1;
	};
	switch (inquiry_result[1]) {
	case 0x40:
		*irq_level = 15;
		break;
	case 0x20:
		*irq_level = 14;
		break;
	case 0x8:
		*irq_level = 12;
		break;
	case 0x4:
		*irq_level = 11;
		break;
	case 0x2:
		*irq_level = 10;
		break;
	case 0x1:
		*irq_level = 9;
		break;
	default:
		printk(KERN_ERR "Unable to determine Adaptec IRQ level.  Disabling board\n");
		return -1;
	};
	*scsi_id = inquiry_result[2] & 7;
	return 0;
}

/* This function should only be called for 1542C boards - we can detect
   the special firmware settings and unlock the board */

static int __init aha1542_mbenable(int base)
{
	static unchar mbenable_cmd[3];
	static unchar mbenable_result[2];
	int retval;

	retval = BIOS_TRANSLATION_6432;

	mbenable_cmd[0] = CMD_EXTBIOS;
	aha1542_out(base, mbenable_cmd, 1);
	if (aha1542_in1(base, mbenable_result, 2))
		return retval;
	WAITd(INTRFLAGS(base), INTRMASK, HACC, 0, 100);
	aha1542_intr_reset(base);

	if ((mbenable_result[0] & 0x08) || mbenable_result[1]) {
		mbenable_cmd[0] = CMD_MBENABLE;
		mbenable_cmd[1] = 0;
		mbenable_cmd[2] = mbenable_result[1];

		if ((mbenable_result[0] & 0x08) && (mbenable_result[1] & 0x03))
			retval = BIOS_TRANSLATION_25563;

		aha1542_out(base, mbenable_cmd, 3);
		WAIT(INTRFLAGS(base), INTRMASK, HACC, 0);
	};
	while (0) {
fail:
		printk(KERN_ERR "aha1542_mbenable: Mailbox init failed\n");
	}
	aha1542_intr_reset(base);
	return retval;
}

/* Query the board to find out if it is a 1542 or a 1740, or whatever. */
static int __init aha1542_query(int base_io, int *transl)
{
	unchar inquiry_cmd[] = {CMD_INQUIRY};
	unchar inquiry_result[4];
	int i;
	i = inb(STATUS(base_io));
	if (i & DF) {
		i = inb(DATA(base_io));
	};
	aha1542_out(base_io, inquiry_cmd, 1);
	aha1542_in(base_io, inquiry_result, 4);
	WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
	while (0) {
fail:
		printk(KERN_ERR "aha1542_detect: query card type\n");
	}
	aha1542_intr_reset(base_io);

	*transl = BIOS_TRANSLATION_6432;	/* Default case */

	/* For an AHA1740 series board, we ignore the board since there is a
	   hardware bug which can lead to wrong blocks being returned if the board
	   is operating in the 1542 emulation mode.  Since there is an extended mode
	   driver, we simply ignore the board and let the 1740 driver pick it up.
	 */

	if (inquiry_result[0] == 0x43) {
		printk(KERN_INFO "aha1542.c: Emulation mode not supported for AHA 174N hardware.\n");
		return 1;
	};

	/* Always call this - boards that do not support extended bios translation
	   will ignore the command, and we will set the proper default */

	*transl = aha1542_mbenable(base_io);

	return 0;
}

#ifndef MODULE
static char *setup_str[MAXBOARDS] __initdata;
static int setup_idx = 0;

static void __init aha1542_setup(char *str, int *ints)
{
	const char *ahausage = "aha1542: usage: aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]\n";
	int setup_portbase;

	if (setup_idx >= MAXBOARDS) {
		printk(KERN_ERR "aha1542: aha1542_setup called too many times! Bad LILO params ?\n");
		printk(KERN_ERR "   Entryline 1: %s\n", setup_str[0]);
		printk(KERN_ERR "   Entryline 2: %s\n", setup_str[1]);
		printk(KERN_ERR "   This line:   %s\n", str);
		return;
	}
	if (ints[0] < 1 || ints[0] > 4) {
		printk(KERN_ERR "aha1542: %s\n", str);
		printk(ahausage);
		printk(KERN_ERR "aha1542: Wrong parameters may cause system malfunction.. We try anyway..\n");
	}
	setup_called[setup_idx] = ints[0];
	setup_str[setup_idx] = str;

	setup_portbase = ints[0] >= 1 ? ints[1] : 0;	/* Preserve the default value.. */
	setup_buson[setup_idx] = ints[0] >= 2 ? ints[2] : 7;
	setup_busoff[setup_idx] = ints[0] >= 3 ? ints[3] : 5;
	if (ints[0] >= 4) 
	{
		int atbt = -1;
		switch (ints[4]) {
		case 5:
			atbt = 0x00;
			break;
		case 6:
			atbt = 0x04;
			break;
		case 7:
			atbt = 0x01;
			break;
		case 8:
			atbt = 0x02;
			break;
		case 10:
			atbt = 0x03;
			break;
		default:
			printk(KERN_ERR "aha1542: %s\n", str);
			printk(ahausage);
			printk(KERN_ERR "aha1542: Valid values for DMASPEED are 5-8, 10 MB/s.  Using jumper defaults.\n");
			break;
		}
		setup_dmaspeed[setup_idx] = atbt;
	}
	if (setup_portbase != 0)
		bases[setup_idx] = setup_portbase;

	++setup_idx;
}

static int __init do_setup(char *str)
{
	int ints[5];

	int count=setup_idx;

	get_options(str, ARRAY_SIZE(ints), ints);
	aha1542_setup(str,ints);

	return count<setup_idx;
}

__setup("aha1542=",do_setup);
#endif

/* return non-zero on detection */
static int __init aha1542_detect(struct scsi_host_template * tpnt)
{
	unsigned char dma_chan;
	unsigned char irq_level;
	unsigned char scsi_id;
	unsigned long flags;
	unsigned int base_io;
	int trans;
	struct Scsi_Host *shpnt = NULL;
	int count = 0;
	int indx;

	DEB(printk("aha1542_detect: \n"));

	tpnt->proc_name = "aha1542";

#ifdef MODULE
	bases[0] = aha1542[0];
	setup_buson[0] = aha1542[1];
	setup_busoff[0] = aha1542[2];
	{
		int atbt = -1;
		switch (aha1542[3]) {
		case 5:
			atbt = 0x00;
			break;
		case 6:
			atbt = 0x04;
			break;
		case 7:
			atbt = 0x01;
			break;
		case 8:
			atbt = 0x02;
			break;
		case 10:
			atbt = 0x03;
			break;
		};
		setup_dmaspeed[0] = atbt;
	}
#endif

	/*
	 *	Find MicroChannel cards (AHA1640)
	 */
#ifdef CONFIG_MCA_LEGACY
	if(MCA_bus) {
		int slot = 0;
		int pos = 0;

		for (indx = 0; (slot != MCA_NOTFOUND) && (indx < ARRAY_SIZE(bases)); indx++) {

			if (bases[indx])
				continue;

			/* Detect only AHA-1640 cards -- MCA ID 0F1F */
			slot = mca_find_unused_adapter(0x0f1f, slot);
			if (slot == MCA_NOTFOUND)
				break;

			/* Found one */
			pos = mca_read_stored_pos(slot, 3);

			/* Decode address */
			if (pos & 0x80) {
				if (pos & 0x02) {
					if (pos & 0x01)
						bases[indx] = 0x334;
					else
						bases[indx] = 0x234;
				} else {
					if (pos & 0x01)
						bases[indx] = 0x134;
				}
			} else {
				if (pos & 0x02) {
					if (pos & 0x01)
						bases[indx] = 0x330;
					else
						bases[indx] = 0x230;
				} else {
					if (pos & 0x01)
						bases[indx] = 0x130;
				}
			}

			/* No need to decode IRQ and Arb level -- those are
			 * read off the card later.
			 */
			printk(KERN_INFO "Found an AHA-1640 in MCA slot %d, I/O 0x%04x\n", slot, bases[indx]);

			mca_set_adapter_name(slot, "Adapter AHA-1640");
			mca_set_adapter_procfn(slot, NULL, NULL);
			mca_mark_as_used(slot);

			/* Go on */
			slot++;
		}

	}
#endif

	/*
	 *	Hunt for ISA Plug'n'Pray Adaptecs (AHA1535)
	 */

	if(isapnp)
	{
		struct pnp_dev *pdev = NULL;
		for(indx = 0; indx < ARRAY_SIZE(bases); indx++) {
			if(bases[indx])
				continue;
			pdev = pnp_find_dev(NULL, ISAPNP_VENDOR('A', 'D', 'P'), 
				ISAPNP_FUNCTION(0x1542), pdev);
			if(pdev==NULL)
				break;
			/*
			 *	Activate the PnP card
			 */

			if(pnp_device_attach(pdev)<0)
				continue;

			if(pnp_activate_dev(pdev)<0) {
				pnp_device_detach(pdev);
				continue;
			}

			if(!pnp_port_valid(pdev, 0)) {
				pnp_device_detach(pdev);
				continue;
			}

			bases[indx] = pnp_port_start(pdev, 0);

			/* The card can be queried for its DMA, we have 
			   the DMA set up that is enough */

			printk(KERN_INFO "ISAPnP found an AHA1535 at I/O 0x%03X\n", bases[indx]);
		}
	}
	for (indx = 0; indx < ARRAY_SIZE(bases); indx++)
		if (bases[indx] != 0 && request_region(bases[indx], 4, "aha1542")) {
			shpnt = scsi_register(tpnt,
					sizeof(struct aha1542_hostdata));

			if(shpnt==NULL) {
				release_region(bases[indx], 4);
				continue;
			}
			/* For now we do this - until kmalloc is more intelligent
			   we are resigned to stupid hacks like this */
			if (SCSI_BUF_PA(shpnt) >= ISA_DMA_THRESHOLD) {
				printk(KERN_ERR "Invalid address for shpnt with 1542.\n");
				goto unregister;
			}
			if (!aha1542_test_port(bases[indx], shpnt))
				goto unregister;


			base_io = bases[indx];

			/* Set the Bus on/off-times as not to ruin floppy performance */
			{
				unchar oncmd[] = {CMD_BUSON_TIME, 7};
				unchar offcmd[] = {CMD_BUSOFF_TIME, 5};

				if (setup_called[indx]) {
					oncmd[1] = setup_buson[indx];
					offcmd[1] = setup_busoff[indx];
				}
				aha1542_intr_reset(base_io);
				aha1542_out(base_io, oncmd, 2);
				WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
				aha1542_intr_reset(base_io);
				aha1542_out(base_io, offcmd, 2);
				WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
				if (setup_dmaspeed[indx] >= 0) {
					unchar dmacmd[] = {CMD_DMASPEED, 0};
					dmacmd[1] = setup_dmaspeed[indx];
					aha1542_intr_reset(base_io);
					aha1542_out(base_io, dmacmd, 2);
					WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
				}
				while (0) {
fail:
					printk(KERN_ERR "aha1542_detect: setting bus on/off-time failed\n");
				}
				aha1542_intr_reset(base_io);
			}
			if (aha1542_query(base_io, &trans))
				goto unregister;

			if (aha1542_getconfig(base_io, &irq_level, &dma_chan, &scsi_id) == -1)
				goto unregister;

			printk(KERN_INFO "Configuring Adaptec (SCSI-ID %d) at IO:%x, IRQ %d", scsi_id, base_io, irq_level);
			if (dma_chan != 0xFF)
				printk(", DMA priority %d", dma_chan);
			printk("\n");

			DEB(aha1542_stat());
			setup_mailboxes(base_io, shpnt);

			DEB(aha1542_stat());

			DEB(printk("aha1542_detect: enable interrupt channel %d\n", irq_level));
			spin_lock_irqsave(&aha1542_lock, flags);
			if (request_irq(irq_level, do_aha1542_intr_handle, 0, "aha1542", NULL)) {
				printk(KERN_ERR "Unable to allocate IRQ for adaptec controller.\n");
				spin_unlock_irqrestore(&aha1542_lock, flags);
				goto unregister;
			}
			if (dma_chan != 0xFF) {
				if (request_dma(dma_chan, "aha1542")) {
					printk(KERN_ERR "Unable to allocate DMA channel for Adaptec.\n");
					free_irq(irq_level, NULL);
					spin_unlock_irqrestore(&aha1542_lock, flags);
					goto unregister;
				}
				if (dma_chan == 0 || dma_chan >= 5) {
					set_dma_mode(dma_chan, DMA_MODE_CASCADE);
					enable_dma(dma_chan);
				}
			}
			aha_host[irq_level - 9] = shpnt;
			shpnt->this_id = scsi_id;
			shpnt->unique_id = base_io;
			shpnt->io_port = base_io;
			shpnt->n_io_port = 4;	/* Number of bytes of I/O space used */
			shpnt->dma_channel = dma_chan;
			shpnt->irq = irq_level;
			HOSTDATA(shpnt)->bios_translation = trans;
			if (trans == BIOS_TRANSLATION_25563)
				printk(KERN_INFO "aha1542.c: Using extended bios translation\n");
			HOSTDATA(shpnt)->aha1542_last_mbi_used = (2 * AHA1542_MAILBOXES - 1);
			HOSTDATA(shpnt)->aha1542_last_mbo_used = (AHA1542_MAILBOXES - 1);
			memset(HOSTDATA(shpnt)->SCint, 0, sizeof(HOSTDATA(shpnt)->SCint));
			spin_unlock_irqrestore(&aha1542_lock, flags);
#if 0
			DEB(printk(" *** READ CAPACITY ***\n"));

			{
				unchar buf[8];
				static unchar cmd[] = { READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
				int i;

				for (i = 0; i < sizeof(buf); ++i)
					buf[i] = 0x87;
				for (i = 0; i < 2; ++i)
					if (!aha1542_command(i, cmd, buf, sizeof(buf))) {
						printk(KERN_DEBUG "aha_detect: LU %d sector_size %d device_size %d\n",
						       i, xscsi2int(buf + 4), xscsi2int(buf));
					}
			}

			DEB(printk(" *** NOW RUNNING MY OWN TEST *** \n"));

			for (i = 0; i < 4; ++i) {
				unsigned char cmd[10];
				static buffer[512];

				cmd[0] = READ_10;
				cmd[1] = 0;
				xany2scsi(cmd + 2, i);
				cmd[6] = 0;
				cmd[7] = 0;
				cmd[8] = 1;
				cmd[9] = 0;
				aha1542_command(0, cmd, buffer, 512);
			}
#endif
			count++;
			continue;
unregister:
			release_region(bases[indx], 4);
			scsi_unregister(shpnt);
			continue;

		};

	return count;
}

static int aha1542_release(struct Scsi_Host *shost)
{
	if (shost->irq)
		free_irq(shost->irq, NULL);
	if (shost->dma_channel != 0xff)
		free_dma(shost->dma_channel);
	if (shost->io_port && shost->n_io_port)
		release_region(shost->io_port, shost->n_io_port);
	scsi_unregister(shost);
	return 0;
}

static int aha1542_restart(struct Scsi_Host *shost)
{
	int i;
	int count = 0;
#if 0
	unchar ahacmd = CMD_START_SCSI;
#endif

	for (i = 0; i < AHA1542_MAILBOXES; i++)
		if (HOSTDATA(shost)->SCint[i] &&
		    !(HOSTDATA(shost)->SCint[i]->device->soft_reset)) {
#if 0
			HOSTDATA(shost)->mb[i].status = 1;	/* Indicate ready to restart... */
#endif
			count++;
		}
	printk(KERN_DEBUG "Potential to restart %d stalled commands...\n", count);
#if 0
	/* start scsi command */
	if (count)
		aha1542_out(shost->io_port, &ahacmd, 1);
#endif
	return 0;
}

/*
 * This is a device reset.  This is handled by sending a special command
 * to the device.
 */
static int aha1542_dev_reset(Scsi_Cmnd * SCpnt)
{
	unsigned long flags;
	struct mailbox *mb;
	unchar target = SCpnt->device->id;
	unchar lun = SCpnt->device->lun;
	int mbo;
	struct ccb *ccb;
	unchar ahacmd = CMD_START_SCSI;

	ccb = HOSTDATA(SCpnt->device->host)->ccb;
	mb = HOSTDATA(SCpnt->device->host)->mb;

	spin_lock_irqsave(&aha1542_lock, flags);
	mbo = HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used + 1;
	if (mbo >= AHA1542_MAILBOXES)
		mbo = 0;

	do {
		if (mb[mbo].status == 0 && HOSTDATA(SCpnt->device->host)->SCint[mbo] == NULL)
			break;
		mbo++;
		if (mbo >= AHA1542_MAILBOXES)
			mbo = 0;
	} while (mbo != HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used);

	if (mb[mbo].status || HOSTDATA(SCpnt->device->host)->SCint[mbo])
		panic("Unable to find empty mailbox for aha1542.\n");

	HOSTDATA(SCpnt->device->host)->SCint[mbo] = SCpnt;	/* This will effectively
							   prevent someone else from
							   screwing with this cdb. */

	HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used = mbo;
	spin_unlock_irqrestore(&aha1542_lock, flags);

	any2scsi(mb[mbo].ccbptr, SCSI_BUF_PA(&ccb[mbo]));	/* This gets trashed for some reason */

	memset(&ccb[mbo], 0, sizeof(struct ccb));

	ccb[mbo].op = 0x81;	/* BUS DEVICE RESET */

	ccb[mbo].idlun = (target & 7) << 5 | (lun & 7);		/*SCSI Target Id */

	ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
	ccb[mbo].commlinkid = 0;

	/* 
	 * Now tell the 1542 to flush all pending commands for this 
	 * target 
	 */
	aha1542_out(SCpnt->device->host->io_port, &ahacmd, 1);

	scmd_printk(KERN_WARNING, SCpnt,
		"Trying device reset for target\n");

	return SUCCESS;


#ifdef ERIC_neverdef
	/* 
	 * With the 1542 we apparently never get an interrupt to
	 * acknowledge a device reset being sent.  Then again, Leonard
	 * says we are doing this wrong in the first place...
	 *
	 * Take a wait and see attitude.  If we get spurious interrupts,
	 * then the device reset is doing something sane and useful, and
	 * we will wait for the interrupt to post completion.
	 */
	printk(KERN_WARNING "Sent BUS DEVICE RESET to target %d\n", SCpnt->target);

	/*
	 * Free the command block for all commands running on this 
	 * target... 
	 */
	for (i = 0; i < AHA1542_MAILBOXES; i++) {
		if (HOSTDATA(SCpnt->host)->SCint[i] &&
		    HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target) {
			Scsi_Cmnd *SCtmp;
			SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
			kfree(SCtmp->host_scribble);
			SCtmp->host_scribble = NULL;
			HOSTDATA(SCpnt->host)->SCint[i] = NULL;
			HOSTDATA(SCpnt->host)->mb[i].status = 0;
		}
	}
	return SUCCESS;

	return FAILED;
#endif				/* ERIC_neverdef */
}

static int aha1542_bus_reset(Scsi_Cmnd * SCpnt)
{
	int i;

	/* 
	 * This does a scsi reset for all devices on the bus.
	 * In principle, we could also reset the 1542 - should
	 * we do this?  Try this first, and we can add that later
	 * if it turns out to be useful.
	 */
	outb(SCRST, CONTROL(SCpnt->device->host->io_port));

	/*
	 * Wait for the thing to settle down a bit.  Unfortunately
	 * this is going to basically lock up the machine while we
	 * wait for this to complete.  To be 100% correct, we need to
	 * check for timeout, and if we are doing something like this
	 * we are pretty desperate anyways.
	 */
	ssleep(4);

	spin_lock_irq(SCpnt->device->host->host_lock);

	WAIT(STATUS(SCpnt->device->host->io_port),
	     STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);

	/*
	 * Now try to pick up the pieces.  For all pending commands,
	 * free any internal data structures, and basically clear things
	 * out.  We do not try and restart any commands or anything - 
	 * the strategy handler takes care of that crap.
	 */
	printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->device->host->host_no);

	for (i = 0; i < AHA1542_MAILBOXES; i++) {
		if (HOSTDATA(SCpnt->device->host)->SCint[i] != NULL) {
			Scsi_Cmnd *SCtmp;
			SCtmp = HOSTDATA(SCpnt->device->host)->SCint[i];


			if (SCtmp->device->soft_reset) {
				/*
				 * If this device implements the soft reset option,
				 * then it is still holding onto the command, and
				 * may yet complete it.  In this case, we don't
				 * flush the data.
				 */
				continue;
			}
			kfree(SCtmp->host_scribble);
			SCtmp->host_scribble = NULL;
			HOSTDATA(SCpnt->device->host)->SCint[i] = NULL;
			HOSTDATA(SCpnt->device->host)->mb[i].status = 0;
		}
	}

	spin_unlock_irq(SCpnt->device->host->host_lock);
	return SUCCESS;

fail:
	spin_unlock_irq(SCpnt->device->host->host_lock);
	return FAILED;
}

static int aha1542_host_reset(Scsi_Cmnd * SCpnt)
{
	int i;

	/* 
	 * This does a scsi reset for all devices on the bus.
	 * In principle, we could also reset the 1542 - should
	 * we do this?  Try this first, and we can add that later
	 * if it turns out to be useful.
	 */
	outb(HRST | SCRST, CONTROL(SCpnt->device->host->io_port));

	/*
	 * Wait for the thing to settle down a bit.  Unfortunately
	 * this is going to basically lock up the machine while we
	 * wait for this to complete.  To be 100% correct, we need to
	 * check for timeout, and if we are doing something like this
	 * we are pretty desperate anyways.
	 */
	ssleep(4);
	spin_lock_irq(SCpnt->device->host->host_lock);

	WAIT(STATUS(SCpnt->device->host->io_port),
	     STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);

	/*
	 * We need to do this too before the 1542 can interact with
	 * us again.
	 */
	setup_mailboxes(SCpnt->device->host->io_port, SCpnt->device->host);

	/*
	 * Now try to pick up the pieces.  For all pending commands,
	 * free any internal data structures, and basically clear things
	 * out.  We do not try and restart any commands or anything - 
	 * the strategy handler takes care of that crap.
	 */
	printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->device->host->host_no);

	for (i = 0; i < AHA1542_MAILBOXES; i++) {
		if (HOSTDATA(SCpnt->device->host)->SCint[i] != NULL) {
			Scsi_Cmnd *SCtmp;
			SCtmp = HOSTDATA(SCpnt->device->host)->SCint[i];

			if (SCtmp->device->soft_reset) {
				/*
				 * If this device implements the soft reset option,
				 * then it is still holding onto the command, and
				 * may yet complete it.  In this case, we don't
				 * flush the data.
				 */
				continue;
			}
			kfree(SCtmp->host_scribble);
			SCtmp->host_scribble = NULL;
			HOSTDATA(SCpnt->device->host)->SCint[i] = NULL;
			HOSTDATA(SCpnt->device->host)->mb[i].status = 0;
		}
	}

	spin_unlock_irq(SCpnt->device->host->host_lock);
	return SUCCESS;

fail:
	spin_unlock_irq(SCpnt->device->host->host_lock);
	return FAILED;
}

#if 0
/*
 * These are the old error handling routines.  They are only temporarily
 * here while we play with the new error handling code.
 */
static int aha1542_old_abort(Scsi_Cmnd * SCpnt)
{
#if 0
	unchar ahacmd = CMD_START_SCSI;
	unsigned long flags;
	struct mailbox *mb;
	int mbi, mbo, i;

	printk(KERN_DEBUG "In aha1542_abort: %x %x\n",
	       inb(STATUS(SCpnt->host->io_port)),
	       inb(INTRFLAGS(SCpnt->host->io_port)));

	spin_lock_irqsave(&aha1542_lock, flags);
	mb = HOSTDATA(SCpnt->host)->mb;
	mbi = HOSTDATA(SCpnt->host)->aha1542_last_mbi_used + 1;
	if (mbi >= 2 * AHA1542_MAILBOXES)
		mbi = AHA1542_MAILBOXES;

	do {
		if (mb[mbi].status != 0)
			break;
		mbi++;
		if (mbi >= 2 * AHA1542_MAILBOXES)
			mbi = AHA1542_MAILBOXES;
	} while (mbi != HOSTDATA(SCpnt->host)->aha1542_last_mbi_used);
	spin_unlock_irqrestore(&aha1542_lock, flags);

	if (mb[mbi].status) {
		printk(KERN_ERR "Lost interrupt discovered on irq %d - attempting to recover\n",
		       SCpnt->host->irq);
		aha1542_intr_handle(SCpnt->host, NULL);
		return 0;
	}
	/* OK, no lost interrupt.  Try looking to see how many pending commands
	   we think we have. */

	for (i = 0; i < AHA1542_MAILBOXES; i++)
		if (HOSTDATA(SCpnt->host)->SCint[i]) {
			if (HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) {
				printk(KERN_ERR "Timed out command pending for %s\n",
				       SCpnt->request->rq_disk ?
				       SCpnt->request->rq_disk->disk_name : "?"
				       );
				if (HOSTDATA(SCpnt->host)->mb[i].status) {
					printk(KERN_ERR "OGMB still full - restarting\n");
					aha1542_out(SCpnt->host->io_port, &ahacmd, 1);
				};
			} else
				printk(KERN_ERR "Other pending command %s\n",
				       SCpnt->request->rq_disk ?
				       SCpnt->request->rq_disk->disk_name : "?"
				       );
		}
#endif

	DEB(printk("aha1542_abort\n"));
#if 0
	spin_lock_irqsave(&aha1542_lock, flags);
	for (mbo = 0; mbo < AHA1542_MAILBOXES; mbo++) {
		if (SCpnt == HOSTDATA(SCpnt->host)->SCint[mbo]) {
			mb[mbo].status = 2;	/* Abort command */
			aha1542_out(SCpnt->host->io_port, &ahacmd, 1);	/* start scsi command */
			spin_unlock_irqrestore(&aha1542_lock, flags);
			break;
		}
	}
	if (AHA1542_MAILBOXES == mbo)
		spin_unlock_irqrestore(&aha1542_lock, flags);
#endif
	return SCSI_ABORT_SNOOZE;
}

/* We do not implement a reset function here, but the upper level code
   assumes that it will get some kind of response for the command in
   SCpnt.  We must oblige, or the command will hang the scsi system.
   For a first go, we assume that the 1542 notifies us with all of the
   pending commands (it does implement soft reset, after all). */

static int aha1542_old_reset(Scsi_Cmnd * SCpnt, unsigned int reset_flags)
{
	unchar ahacmd = CMD_START_SCSI;
	int i;

	/*
	 * See if a bus reset was suggested.
	 */
	if (reset_flags & SCSI_RESET_SUGGEST_BUS_RESET) {
		/* 
		 * This does a scsi reset for all devices on the bus.
		 * In principle, we could also reset the 1542 - should
		 * we do this?  Try this first, and we can add that later
		 * if it turns out to be useful.
		 */
		outb(HRST | SCRST, CONTROL(SCpnt->host->io_port));

		/*
		 * Wait for the thing to settle down a bit.  Unfortunately
		 * this is going to basically lock up the machine while we
		 * wait for this to complete.  To be 100% correct, we need to
		 * check for timeout, and if we are doing something like this
		 * we are pretty desperate anyways.
		 */
		WAIT(STATUS(SCpnt->host->io_port),
		STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);

		/*
		 * We need to do this too before the 1542 can interact with
		 * us again.
		 */
		setup_mailboxes(SCpnt->host->io_port, SCpnt->host);

		/*
		 * Now try to pick up the pieces.  Restart all commands
		 * that are currently active on the bus, and reset all of
		 * the datastructures.  We have some time to kill while
		 * things settle down, so print a nice message.
		 */
		printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->host->host_no);

		for (i = 0; i < AHA1542_MAILBOXES; i++)
			if (HOSTDATA(SCpnt->host)->SCint[i] != NULL) {
				Scsi_Cmnd *SCtmp;
				SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
				SCtmp->result = DID_RESET << 16;
				kfree(SCtmp->host_scribble);
				SCtmp->host_scribble = NULL;
				printk(KERN_WARNING "Sending DID_RESET for target %d\n", SCpnt->target);
				SCtmp->scsi_done(SCpnt);

				HOSTDATA(SCpnt->host)->SCint[i] = NULL;
				HOSTDATA(SCpnt->host)->mb[i].status = 0;
			}
		/*
		 * Now tell the mid-level code what we did here.  Since
		 * we have restarted all of the outstanding commands,
		 * then report SUCCESS.
		 */
		return (SCSI_RESET_SUCCESS | SCSI_RESET_BUS_RESET);
fail:
		printk(KERN_CRIT "aha1542.c: Unable to perform hard reset.\n");
		printk(KERN_CRIT "Power cycle machine to reset\n");
		return (SCSI_RESET_ERROR | SCSI_RESET_BUS_RESET);


	} else {
		/* This does a selective reset of just the one device */
		/* First locate the ccb for this command */
		for (i = 0; i < AHA1542_MAILBOXES; i++)
			if (HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) {
				HOSTDATA(SCpnt->host)->ccb[i].op = 0x81;	/* BUS DEVICE RESET */
				/* Now tell the 1542 to flush all pending commands for this target */
				aha1542_out(SCpnt->host->io_port, &ahacmd, 1);

				/* Here is the tricky part.  What to do next.  Do we get an interrupt
				   for the commands that we aborted with the specified target, or
				   do we generate this on our own?  Try it without first and see
				   what happens */
				printk(KERN_WARNING "Sent BUS DEVICE RESET to target %d\n", SCpnt->target);

				/* If the first does not work, then try the second.  I think the
				   first option is more likely to be correct. Free the command
				   block for all commands running on this target... */
				for (i = 0; i < AHA1542_MAILBOXES; i++)
					if (HOSTDATA(SCpnt->host)->SCint[i] &&
					    HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target) {
						Scsi_Cmnd *SCtmp;
						SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
						SCtmp->result = DID_RESET << 16;
						kfree(SCtmp->host_scribble);
						SCtmp->host_scribble = NULL;
						printk(KERN_WARNING "Sending DID_RESET for target %d\n", SCpnt->target);
						SCtmp->scsi_done(SCpnt);

						HOSTDATA(SCpnt->host)->SCint[i] = NULL;
						HOSTDATA(SCpnt->host)->mb[i].status = 0;
					}
				return SCSI_RESET_SUCCESS;
			}
	}
	/* No active command at this time, so this means that each time we got
	   some kind of response the last time through.  Tell the mid-level code
	   to request sense information in order to decide what to do next. */
	return SCSI_RESET_PUNT;
}
#endif    /* end of big comment block around old_abort + old_reset */

static int aha1542_biosparam(struct scsi_device *sdev,
		struct block_device *bdev, sector_t capacity, int *ip)
{
	int translation_algorithm;
	int size = capacity;

	translation_algorithm = HOSTDATA(sdev->host)->bios_translation;

	if ((size >> 11) > 1024 && translation_algorithm == BIOS_TRANSLATION_25563) {
		/* Please verify that this is the same as what DOS returns */
		ip[0] = 255;
		ip[1] = 63;
		ip[2] = size / 255 / 63;
	} else {
		ip[0] = 64;
		ip[1] = 32;
		ip[2] = size >> 11;
	}

	return 0;
}
MODULE_LICENSE("GPL");


static struct scsi_host_template driver_template = {
	.proc_name		= "aha1542",
	.name			= "Adaptec 1542",
	.detect			= aha1542_detect,
	.release		= aha1542_release,
	.queuecommand		= aha1542_queuecommand,
	.eh_device_reset_handler= aha1542_dev_reset,
	.eh_bus_reset_handler	= aha1542_bus_reset,
	.eh_host_reset_handler	= aha1542_host_reset,
	.bios_param		= aha1542_biosparam,
	.can_queue		= AHA1542_MAILBOXES, 
	.this_id		= 7,
	.sg_tablesize		= AHA1542_SCATTER,
	.cmd_per_lun		= AHA1542_CMDLUN,
	.unchecked_isa_dma	= 1, 
	.use_clustering		= ENABLE_CLUSTERING,
};
#include "scsi_module.c"
OpenPOWER on IntegriCloud