Free Electrons

Embedded Linux Experts

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
/************************************************************************
 *	FILE NAME : TMSCSIM.C						*
 *	     BY   : C.L. Huang,  ching@tekram.com.tw			*
 *	Description: Device Driver for Tekram DC-390(T) PCI SCSI	*
 *		     Bus Master Host Adapter				*
 * (C)Copyright 1995-1996 Tekram Technology Co., Ltd.			*
 ************************************************************************
 * (C) Copyright: put under GNU GPL in 10/96				*
 *				(see Documentation/scsi/tmscsim.txt)	*
 ************************************************************************
 * $Id: tmscsim.c,v 2.60.2.30 2000/12/20 01:07:12 garloff Exp $		*
 *	Enhancements and bugfixes by					*
 *	Kurt Garloff <kurt@garloff.de>	<garloff@suse.de>		*
 ************************************************************************
 *	HISTORY:							*
 *									*
 *	REV#	DATE	NAME	DESCRIPTION				*
 *	1.00  96/04/24	CLH	First release				*
 *	1.01  96/06/12	CLH	Fixed bug of Media Change for Removable *
 *				Device, scan all LUN. Support Pre2.0.10 *
 *	1.02  96/06/18	CLH	Fixed bug of Command timeout ...	*
 *	1.03  96/09/25	KG	Added tmscsim_proc_info()		*
 *	1.04  96/10/11	CLH	Updating for support KV 2.0.x		*
 *	1.05  96/10/18	KG	Fixed bug in DC390_abort(null ptr deref)*
 *	1.06  96/10/25	KG	Fixed module support			*
 *	1.07  96/11/09	KG	Fixed tmscsim_proc_info()		*
 *	1.08  96/11/18	KG	Fixed null ptr in DC390_Disconnect()	*
 *	1.09  96/11/30	KG	Added register the allocated IO space	*
 *	1.10  96/12/05	CLH	Modified tmscsim_proc_info(), and reset *
 *				pending interrupt in DC390_detect()	*
 *	1.11  97/02/05	KG/CLH	Fixeds problem with partitions greater	*
 *				than 1GB				*
 *	1.12  98/02/15  MJ      Rewritten PCI probing			*
 *	1.13  98/04/08	KG	Support for non DC390, __initfunc decls,*
 *				changed max devs from 10 to 16		*
 *	1.14a 98/05/05	KG	Dynamic DCB allocation, add-single-dev	*
 *				for LUNs if LUN_SCAN (BIOS) not set	*
 *				runtime config using /proc interface	*
 *	1.14b 98/05/06	KG	eliminated cli (); sti (); spinlocks	*
 *	1.14c 98/05/07	KG	2.0.x compatibility			*
 *	1.20a 98/05/07	KG	changed names of funcs to be consistent *
 *				DC390_ (entry points), dc390_ (internal)*
 *				reworked locking			*
 *	1.20b 98/05/12	KG	bugs: version, kfree, _ctmp		*
 *				debug output				*
 *	1.20c 98/05/12	KG	bugs: kfree, parsing, EEpromDefaults	*
 *	1.20d 98/05/14	KG	bugs: list linkage, clear flag after  	*
 *				reset on startup, code cleanup		*
 *	1.20e 98/05/15	KG	spinlock comments, name space cleanup	*
 *				pLastDCB now part of ACB structure	*
 *				added stats, timeout for 2.1, TagQ bug	*
 *				RESET and INQUIRY interface commands	*
 *	1.20f 98/05/18	KG	spinlocks fixes, max_lun fix, free DCBs	*
 *				for missing LUNs, pending int		*
 *	1.20g 98/05/19	KG	Clean up: Avoid short			*
 *	1.20h 98/05/21	KG	Remove AdaptSCSIID, max_lun ...		*
 *	1.20i 98/05/21	KG	Aiiie: Bug with TagQMask       		*
 *	1.20j 98/05/24	KG	Handle STAT_BUSY, handle pACB->pLinkDCB	*
 *				== 0 in remove_dev and DoingSRB_Done	*
 *	1.20k 98/05/25	KG	DMA_INT	(experimental)	       		*
 *	1.20l 98/05/27	KG	remove DMA_INT; DMA_IDLE cmds added;	*
 *	1.20m 98/06/10	KG	glitch configurable; made some global	*
 *				vars part of ACB; use DC390_readX	*
 *	1.20n 98/06/11	KG	startup params				*
 *	1.20o 98/06/15	KG	added TagMaxNum to boot/module params	*
 *				Device Nr -> Idx, TagMaxNum power of 2  *
 *	1.20p 98/06/17	KG	Docu updates. Reset depends on settings *
 *				pci_set_master added; 2.0.xx: pcibios_*	*
 *				used instead of MechNum things ...	*
 *	1.20q 98/06/23	KG	Changed defaults. Added debug code for	*
 *				removable media and fixed it. TagMaxNum	*
 *				fixed for DC390. Locking: ACB, DRV for	*
 *				better IRQ sharing. Spelling: Queueing	*
 *				Parsing and glitch_cfg changes. Display	*
 *				real SyncSpeed value. Made DisConn	*
 *				functional (!)				*
 *	1.20r 98/06/30	KG	Debug macros, allow disabling DsCn, set	*
 *				BIT4 in CtrlR4, EN_PAGE_INT, 2.0 module	*
 *				param -1 fixed.				*
 *	1.20s 98/08/20	KG	Debug info on abort(), try to check PCI,*
 *				phys_to_bus instead of phys_to_virt,	*
 *				fixed sel. process, fixed locking,	*
 *				added MODULE_XXX infos, changed IRQ	*
 *				request flags, disable DMA_INT		*
 *	1.20t 98/09/07	KG	TagQ report fixed; Write Erase DMA Stat;*
 *				initfunc -> __init; better abort;	*
 *				Timeout for XFER_DONE & BLAST_COMPLETE;	*
 *				Allow up to 33 commands being processed *
 *	2.0a  98/10/14	KG	Max Cmnds back to 17. DMA_Stat clearing *
 *				all flags. Clear within while() loops	*
 *				in DataIn_0/Out_0. Null ptr in dumpinfo	*
 *				for pSRB==0. Better locking during init.*
 *				bios_param() now respects part. table.	*
 *	2.0b  98/10/24	KG	Docu fixes. Timeout Msg in DMA Blast.	*
 *				Disallow illegal idx in INQUIRY/REMOVE	*
 *	2.0c  98/11/19	KG	Cleaned up detect/init for SMP boxes, 	*
 *				Write Erase DMA (1.20t) caused problems	*
 *	2.0d  98/12/25	KG	Christmas release ;-) Message handling  *
 *				completely reworked. Handle target ini-	*
 *				tiated SDTR correctly.			*
 *	2.0d1 99/01/25	KG	Try to handle RESTORE_PTR		*
 *	2.0d2 99/02/08	KG	Check for failure of kmalloc, correct 	*
 *				inclusion of scsicam.h, DelayReset	*
 *	2.0d3 99/05/31	KG	DRIVER_OK -> DID_OK, DID_NO_CONNECT,	*
 *				detect Target mode and warn.		*
 *				pcmd->result handling cleaned up.	*
 *	2.0d4 99/06/01	KG	Cleaned selection process. Found bug	*
 *				which prevented more than 16 tags. Now:	*
 *				24. SDTR cleanup. Cleaner multi-LUN	*
 *				handling. Don't modify ControlRegs/FIFO	*
 *				when connected.				*
 *	2.0d5 99/06/01	KG	Clear DevID, Fix INQUIRY after cfg chg.	*
 *	2.0d6 99/06/02	KG	Added ADD special command to allow cfg.	*
 *				before detection. Reset SYNC_NEGO_DONE	*
 *				after a bus reset.			*
 *	2.0d7 99/06/03	KG	Fixed bugs wrt add,remove commands	*
 *	2.0d8 99/06/04	KG	Removed copying of cmnd into CmdBlock.	*
 *				Fixed Oops in _release().		*
 *	2.0d9 99/06/06	KG	Also tag queue INQUIRY, T_U_R, ...	*
 *				Allow arb. no. of Tagged Cmnds. Max 32	*
 *	2.0d1099/06/20	KG	TagMaxNo changes now honoured! Queueing *
 *				clearified (renamed ..) TagMask handling*
 *				cleaned.				*
 *	2.0d1199/06/28	KG	cmd->result now identical to 2.0d2	*
 *	2.0d1299/07/04	KG	Changed order of processing in IRQ	*
 *	2.0d1399/07/05	KG	Don't update DCB fields if removed	*
 *	2.0d1499/07/05	KG	remove_dev: Move kfree() to the end	*
 *	2.0d1599/07/12	KG	use_new_eh_code: 0, ULONG -> UINT where	*
 *				appropriate				*
 *	2.0d1699/07/13	KG	Reenable StartSCSI interrupt, Retry msg	*
 *	2.0d1799/07/15	KG	Remove debug msg. Disable recfg. when	*
 *				there are queued cmnds			*
 *	2.0d1899/07/18	KG	Selection timeout: Don't requeue	*
 *	2.0d1999/07/18	KG	Abort: Only call scsi_done if dequeued	*
 *	2.0d2099/07/19	KG	Rst_Detect: DoingSRB_Done		*
 *	2.0d2199/08/15	KG	dev_id for request/free_irq, cmnd[0] for*
 *				RETRY, SRBdone does DID_ABORT for the 	*
 *				cmd passed by DC390_reset()		*
 *	2.0d2299/08/25	KG	dev_id fixed. can_queue: 42		*
 *	2.0d2399/08/25	KG	Removed some debugging code. dev_id 	*
 *				now is set to pACB. Use u8,u16,u32. 	*
 *	2.0d2499/11/14	KG	Unreg. I/O if failed IRQ alloc. Call	*
 * 				done () w/ DID_BAD_TARGET in case of	*
 *				missing DCB. We	are old EH!!		*
 *	2.0d2500/01/15	KG	2.3.3x compat from Andreas Schultz	*
 *				set unique_id. Disable RETRY message.	*
 *	2.0d2600/01/29	KG	Go to new EH.				*
 *	2.0d2700/01/31	KG	... but maintain 2.0 compat.		*
 *				and fix DCB freeing			*
 *	2.0d2800/02/14	KG	Queue statistics fixed, dump special cmd*
 *				Waiting_Timer for failed StartSCSI	*
 *				New EH: Don't return cmnds to ML on RST *
 *				Use old EH (don't have new EH fns yet)	*
 * 				Reset: Unlock, but refuse to queue	*
 * 				2.3 __setup function			*
 *	2.0e  00/05/22	KG	Return residual for 2.3			*
 *	2.0e1 00/05/25	KG	Compile fixes for 2.3.99		*
 *	2.0e2 00/05/27	KG	Jeff Garzik's pci_enable_device()	*
 *	2.0e3 00/09/29	KG	Some 2.4 changes. Don't try Sync Nego	*
 *				before INQUIRY has reported ability. 	*
 *				Recognise INQUIRY as scanning command.	*
 *	2.0e4 00/10/13	KG	Allow compilation into 2.4 kernel	*
 *	2.0e5 00/11/17	KG	Store Inq.flags in DCB			*
 *	2.0e6 00/11/22  KG	2.4 init function (Thx to O.Schumann)	*
 * 				2.4 PCI device table (Thx to A.Richter)	*
 *	2.0e7 00/11/28	KG	Allow overriding of BIOS settings	*
 *	2.0f  00/12/20	KG	Handle failed INQUIRYs during scan	*
 *	2.1a  03/11/29  GL, KG	Initial fixing for 2.6. Convert to	*
 *				use the current PCI-mapping API, update	*
 *				command-queuing.			*
 *	2.1b  04/04/13  GL	Fix for 64-bit platforms		*
 *	2.1b1 04/01/31	GL	(applied 05.04) Remove internal		*
 *				command-queuing.			*
 *	2.1b2 04/02/01	CH	(applied 05.04) Fix error-handling	*
 *	2.1c  04/05/23  GL	Update to use the new pci_driver API,	*
 *				some scsi EH updates, more cleanup.	*
 *	2.1d  04/05/27	GL	Moved setting of scan_devices to	*
 *				slave_alloc/_configure/_destroy, as	*
 *				suggested by CH.			*
 ***********************************************************************/

/* DEBUG options */
//#define DC390_DEBUG0
//#define DC390_DEBUG1
//#define DC390_DCBDEBUG
//#define DC390_PARSEDEBUG
//#define DC390_REMOVABLEDEBUG
//#define DC390_LOCKDEBUG

//#define NOP do{}while(0)
#define C_NOP

/* Debug definitions */
#ifdef DC390_DEBUG0
# define DEBUG0(x) x
#else
# define DEBUG0(x) C_NOP
#endif
#ifdef DC390_DEBUG1
# define DEBUG1(x) x
#else
# define DEBUG1(x) C_NOP
#endif
#ifdef DC390_DCBDEBUG
# define DCBDEBUG(x) x
#else
# define DCBDEBUG(x) C_NOP
#endif
#ifdef DC390_PARSEDEBUG
# define PARSEDEBUG(x) x
#else
# define PARSEDEBUG(x) C_NOP
#endif
#ifdef DC390_REMOVABLEDEBUG
# define REMOVABLEDEBUG(x) x
#else
# define REMOVABLEDEBUG(x) C_NOP
#endif
#define DCBDEBUG1(x) C_NOP

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/blkdev.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <asm/io.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsicam.h>
#include <scsi/scsi_tcq.h>


#define DC390_BANNER "Tekram DC390/AM53C974"
#define DC390_VERSION "2.1d 2004-05-27"

#define PCI_DEVICE_ID_AMD53C974 	PCI_DEVICE_ID_AMD_SCSI

#include "tmscsim.h"


static void dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
static void dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);

static void dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB );
static void dc390_Disconnect( struct dc390_acb* pACB );
static void dc390_Reselect( struct dc390_acb* pACB );
static void dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB );
static void dc390_ScsiRstDetect( struct dc390_acb* pACB );
static void dc390_EnableMsgOut_Abort(struct dc390_acb*, struct dc390_srb*);
static void dc390_dumpinfo(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB);
static void dc390_ResetDevParam(struct dc390_acb* pACB);

static u32	dc390_laststatus = 0;
static u8	dc390_adapterCnt = 0;

static int disable_clustering;
module_param(disable_clustering, int, S_IRUGO);
MODULE_PARM_DESC(disable_clustering, "If you experience problems with your devices, try setting to 1");

/* Startup values, to be overriden on the commandline */
static int tmscsim[] = {-2, -2, -2, -2, -2, -2};

module_param_array(tmscsim, int, NULL, 0);
MODULE_PARM_DESC(tmscsim, "Host SCSI ID, Speed (0=10MHz), Device Flags, Adapter Flags, Max Tags (log2(tags)-1), DelayReset (s)");
MODULE_AUTHOR("C.L. Huang / Kurt Garloff");
MODULE_DESCRIPTION("SCSI host adapter driver for Tekram DC390 and other AMD53C974A based PCI SCSI adapters");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("sd,sr,sg,st");

static void *dc390_phase0[]={
       dc390_DataOut_0,
       dc390_DataIn_0,
       dc390_Command_0,
       dc390_Status_0,
       dc390_Nop_0,
       dc390_Nop_0,
       dc390_MsgOut_0,
       dc390_MsgIn_0,
       dc390_Nop_1
       };

static void *dc390_phase1[]={
       dc390_DataOutPhase,
       dc390_DataInPhase,
       dc390_CommandPhase,
       dc390_StatusPhase,
       dc390_Nop_0,
       dc390_Nop_0,
       dc390_MsgOutPhase,
       dc390_MsgInPhase,
       dc390_Nop_1
       };

#ifdef DC390_DEBUG1
static char* dc390_p0_str[] = {
       "dc390_DataOut_0",
       "dc390_DataIn_0",
       "dc390_Command_0",
       "dc390_Status_0",
       "dc390_Nop_0",
       "dc390_Nop_0",
       "dc390_MsgOut_0",
       "dc390_MsgIn_0",
       "dc390_Nop_1"
       };
     
static char* dc390_p1_str[] = {
       "dc390_DataOutPhase",
       "dc390_DataInPhase",
       "dc390_CommandPhase",
       "dc390_StatusPhase",
       "dc390_Nop_0",
       "dc390_Nop_0",
       "dc390_MsgOutPhase",
       "dc390_MsgInPhase",
       "dc390_Nop_1"
       };
#endif   

static u8  dc390_eepromBuf[MAX_ADAPTER_NUM][EE_LEN];
static u8  dc390_clock_period1[] = {4, 5, 6, 7, 8, 10, 13, 20};
static u8  dc390_clock_speed[] = {100,80,67,57,50, 40, 31, 20};

/***********************************************************************
 * Functions for the management of the internal structures 
 * (DCBs, SRBs, Queueing)
 *
 **********************************************************************/
static void inline dc390_start_segment(struct dc390_srb* pSRB)
{
	struct scatterlist *psgl = pSRB->pSegmentList;

	/* start new sg segment */
	pSRB->SGBusAddr = sg_dma_address(psgl);
	pSRB->SGToBeXferLen = sg_dma_len(psgl);
}

static unsigned long inline dc390_advance_segment(struct dc390_srb* pSRB, u32 residue)
{
	unsigned long xfer = pSRB->SGToBeXferLen - residue;

	/* xfer more bytes transferred */
	pSRB->SGBusAddr += xfer;
	pSRB->TotalXferredLen += xfer;
	pSRB->SGToBeXferLen = residue;

	return xfer;
}

static struct dc390_dcb __inline__ *dc390_findDCB ( struct dc390_acb* pACB, u8 id, u8 lun)
{
   struct dc390_dcb* pDCB = pACB->pLinkDCB; if (!pDCB) return NULL;
   while (pDCB->TargetID != id || pDCB->TargetLUN != lun)
     {
	pDCB = pDCB->pNextDCB;
	if (pDCB == pACB->pLinkDCB)
	     return NULL;
     }
   DCBDEBUG1( printk (KERN_DEBUG "DCB %p (%02x,%02x) found.\n",	\
		      pDCB, pDCB->TargetID, pDCB->TargetLUN));
   return pDCB;
}

/* Insert SRB oin top of free list */
static __inline__ void dc390_Free_insert (struct dc390_acb* pACB, struct dc390_srb* pSRB)
{
    DEBUG0(printk ("DC390: Free SRB %p\n", pSRB));
    pSRB->pNextSRB = pACB->pFreeSRB;
    pACB->pFreeSRB = pSRB;
}

static __inline__ void dc390_Going_append (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
{
    pDCB->GoingSRBCnt++;
    DEBUG0(printk("DC390: Append SRB %p to Going\n", pSRB));
    /* Append to the list of Going commands */
    if( pDCB->pGoingSRB )
	pDCB->pGoingLast->pNextSRB = pSRB;
    else
	pDCB->pGoingSRB = pSRB;

    pDCB->pGoingLast = pSRB;
    /* No next one in sent list */
    pSRB->pNextSRB = NULL;
}

static __inline__ void dc390_Going_remove (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
{
	DEBUG0(printk("DC390: Remove SRB %p from Going\n", pSRB));
   if (pSRB == pDCB->pGoingSRB)
	pDCB->pGoingSRB = pSRB->pNextSRB;
   else
     {
	struct dc390_srb* psrb = pDCB->pGoingSRB;
	while (psrb && psrb->pNextSRB != pSRB)
	  psrb = psrb->pNextSRB;
	if (!psrb) 
	  { printk (KERN_ERR "DC390: Remove non-ex. SRB %p from Going!\n", pSRB); return; }
	psrb->pNextSRB = pSRB->pNextSRB;
	if (pSRB == pDCB->pGoingLast)
	  pDCB->pGoingLast = psrb;
     }
   pDCB->GoingSRBCnt--;
}

static struct scatterlist* dc390_sg_build_single(struct scatterlist *sg, void *addr, unsigned int length)
{
	sg_init_one(sg, addr, length);
	return sg;
}

/* Create pci mapping */
static int dc390_pci_map (struct dc390_srb* pSRB)
{
	int error = 0;
	struct scsi_cmnd *pcmd = pSRB->pcmd;
	struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
	dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp));

	/* Map sense buffer */
	if (pSRB->SRBFlag & AUTO_REQSENSE) {
		pSRB->pSegmentList	= dc390_sg_build_single(&pSRB->Segmentx, pcmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
		pSRB->SGcount		= pci_map_sg(pdev, pSRB->pSegmentList, 1,
						     DMA_FROM_DEVICE);
		cmdp->saved_dma_handle	= sg_dma_address(pSRB->pSegmentList);

		/* TODO: error handling */
		if (pSRB->SGcount != 1)
			error = 1;
		DEBUG1(printk("%s(): Mapped sense buffer %p at %x\n", __func__, pcmd->sense_buffer, cmdp->saved_dma_handle));
	/* Map SG list */
	} else if (scsi_sg_count(pcmd)) {
		int nseg;

		nseg = scsi_dma_map(pcmd);

		pSRB->pSegmentList	= scsi_sglist(pcmd);
		pSRB->SGcount		= nseg;

		/* TODO: error handling */
		if (nseg < 0)
			error = 1;
		DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\
			      __func__, scsi_sglist(pcmd), nseg, scsi_sg_count(pcmd)));
	/* Map single segment */
	} else
		pSRB->SGcount = 0;

	return error;
}

/* Remove pci mapping */
static void dc390_pci_unmap (struct dc390_srb* pSRB)
{
	struct scsi_cmnd *pcmd = pSRB->pcmd;
	struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
	DEBUG1(dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp)));

	if (pSRB->SRBFlag) {
		pci_unmap_sg(pdev, &pSRB->Segmentx, 1, DMA_FROM_DEVICE);
		DEBUG1(printk("%s(): Unmapped sense buffer at %x\n", __func__, cmdp->saved_dma_handle));
	} else {
		scsi_dma_unmap(pcmd);
		DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n",
			      __func__, scsi_sglist(pcmd), scsi_sg_count(pcmd)));
	}
}

static void __inline__
dc390_freetag (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
{
	if (pSRB->TagNumber != SCSI_NO_TAG) {
		pDCB->TagMask &= ~(1 << pSRB->TagNumber);   /* free tag mask */
		pSRB->TagNumber = SCSI_NO_TAG;
	}
}


static int
dc390_StartSCSI( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
{
    struct scsi_cmnd *scmd = pSRB->pcmd;
    struct scsi_device *sdev = scmd->device;
    u8 cmd, disc_allowed, try_sync_nego;
    char tag[2];

    pSRB->ScsiPhase = SCSI_NOP0;

    if (pACB->Connected)
    {
	// Should not happen normally
	printk (KERN_WARNING "DC390: Can't select when connected! (%08x,%02x)\n",
		pSRB->SRBState, pSRB->SRBFlag);
	pSRB->SRBState = SRB_READY;
	pACB->SelConn++;
	return 1;
    }
    if (time_before (jiffies, pACB->last_reset))
    {
	DEBUG0(printk ("DC390: We were just reset and don't accept commands yet!\n"));
	return 1;
    }
    /* KG: Moved pci mapping here */
    dc390_pci_map(pSRB);
    /* TODO: error handling */
    DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
    DC390_write8 (Sync_Period, pDCB->SyncPeriod);
    DC390_write8 (Sync_Offset, pDCB->SyncOffset);
    DC390_write8 (CtrlReg1, pDCB->CtrlR1);
    DC390_write8 (CtrlReg3, pDCB->CtrlR3);
    DC390_write8 (CtrlReg4, pDCB->CtrlR4);
    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);		/* Flush FIFO */
    DEBUG1(printk (KERN_INFO "DC390: Start SCSI command: %02x (Sync:%02x)\n",\
            scmd->cmnd[0], pDCB->SyncMode));

    /* Don't disconnect on AUTO_REQSENSE, cause it might be an
     * Contingent Allegiance Condition (6.6), where no tags should be used.
     * All other have to be allowed to disconnect to prevent Incorrect 
     * Initiator Connection (6.8.2/6.5.2) */
    /* Changed KG, 99/06/06 */
    if (! (pSRB->SRBFlag & AUTO_REQSENSE))
	disc_allowed = pDCB->DevMode & EN_DISCONNECT_;
    else
	disc_allowed = 0;

    if ((pDCB->SyncMode & SYNC_ENABLE) && pDCB->TargetLUN == 0 && sdev->sdtr &&
	(((scmd->cmnd[0] == REQUEST_SENSE || (pSRB->SRBFlag & AUTO_REQSENSE)) &&
	  !(pDCB->SyncMode & SYNC_NEGO_DONE)) || scmd->cmnd[0] == INQUIRY))
      try_sync_nego = 1;
    else
      try_sync_nego = 0;

    pSRB->MsgCnt = 0;
    cmd = SEL_W_ATN;
    DC390_write8 (ScsiFifo, IDENTIFY(disc_allowed, pDCB->TargetLUN));
    /* Change 99/05/31: Don't use tags when not disconnecting (BUSY) */
    if ((pDCB->SyncMode & EN_TAG_QUEUEING) && disc_allowed && scsi_populate_tag_msg(scmd, tag)) {
	DC390_write8(ScsiFifo, tag[0]);
	pDCB->TagMask |= 1 << tag[1];
	pSRB->TagNumber = tag[1];
	DC390_write8(ScsiFifo, tag[1]);
	DEBUG1(printk(KERN_INFO "DC390: Select w/DisCn for SRB %p, block tag %02x\n", pSRB, tag[1]));
	cmd = SEL_W_ATN3;
    } else {
	/* No TagQ */
//no_tag:
	DEBUG1(printk(KERN_INFO "DC390: Select w%s/DisCn for SRB %p, No TagQ\n", disc_allowed ? "" : "o", pSRB));
    }

    pSRB->SRBState = SRB_START_;

    if (try_sync_nego)
      { 
	u8 Sync_Off = pDCB->SyncOffset;
        DEBUG0(printk (KERN_INFO "DC390: NEW Sync Nego code triggered (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN));
	pSRB->MsgOutBuf[0] = EXTENDED_MESSAGE;
	pSRB->MsgOutBuf[1] = 3;
	pSRB->MsgOutBuf[2] = EXTENDED_SDTR;
	pSRB->MsgOutBuf[3] = pDCB->NegoPeriod;
	if (!(Sync_Off & 0x0f)) Sync_Off = SYNC_NEGO_OFFSET;
	pSRB->MsgOutBuf[4] = Sync_Off;
	pSRB->MsgCnt = 5;
	//pSRB->SRBState = SRB_MSGOUT_;
	pSRB->SRBState |= DO_SYNC_NEGO;
	cmd = SEL_W_ATN_STOP;
      }

    /* Command is written in CommandPhase, if SEL_W_ATN_STOP ... */
    if (cmd != SEL_W_ATN_STOP)
      {
	if( pSRB->SRBFlag & AUTO_REQSENSE )
	  {
	    DC390_write8 (ScsiFifo, REQUEST_SENSE);
	    DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
	    DC390_write8 (ScsiFifo, 0);
	    DC390_write8 (ScsiFifo, 0);
	    DC390_write8 (ScsiFifo, SCSI_SENSE_BUFFERSIZE);
	    DC390_write8 (ScsiFifo, 0);
	    DEBUG1(printk (KERN_DEBUG "DC390: AutoReqSense !\n"));
	  }
	else	/* write cmnd to bus */ 
	  {
	    u8 *ptr; u8 i;
	    ptr = (u8 *)scmd->cmnd;
	    for (i = 0; i < scmd->cmd_len; i++)
	      DC390_write8 (ScsiFifo, *(ptr++));
	  }
      }
    DEBUG0(if (pACB->pActiveDCB)	\
	   printk (KERN_WARNING "DC390: ActiveDCB != 0\n"));
    DEBUG0(if (pDCB->pActiveSRB)	\
	   printk (KERN_WARNING "DC390: ActiveSRB != 0\n"));
    //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
    if (DC390_read8 (Scsi_Status) & INTERRUPT)
    {
	dc390_freetag (pDCB, pSRB);
	DEBUG0(printk ("DC390: Interrupt during Start SCSI (target %02i-%02i)\n",
		scmd->device->id, scmd->device->lun));
	pSRB->SRBState = SRB_READY;
	//DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
	pACB->SelLost++;
	return 1;
    }
    DC390_write8 (ScsiCmd, cmd);
    pACB->pActiveDCB = pDCB;
    pDCB->pActiveSRB = pSRB;
    pACB->Connected = 1;
    pSRB->ScsiPhase = SCSI_NOP1;
    return 0;
}


static void __inline__
dc390_InvalidCmd(struct dc390_acb* pACB)
{
	if (pACB->pActiveDCB->pActiveSRB->SRBState & (SRB_START_ | SRB_MSGOUT))
		DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
}


static irqreturn_t __inline__
DC390_Interrupt(void *dev_id)
{
    struct dc390_acb *pACB = dev_id;
    struct dc390_dcb *pDCB;
    struct dc390_srb *pSRB;
    u8  sstatus=0;
    u8  phase;
    void   (*stateV)( struct dc390_acb*, struct dc390_srb*, u8 *);
    u8  istate, istatus;

    sstatus = DC390_read8 (Scsi_Status);
    if( !(sstatus & INTERRUPT) )
	return IRQ_NONE;

    DEBUG1(printk (KERN_DEBUG "sstatus=%02x,", sstatus));

    //DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
    //dstatus = DC390_read8 (DMA_Status);
    //DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);

    spin_lock_irq(pACB->pScsiHost->host_lock);

    istate = DC390_read8 (Intern_State);
    istatus = DC390_read8 (INT_Status); /* This clears Scsi_Status, Intern_State and INT_Status ! */

    DEBUG1(printk (KERN_INFO "Istatus(Res,Inv,Dis,Serv,Succ,ReS,SelA,Sel)=%02x,",istatus));
    dc390_laststatus &= ~0x00ffffff;
    dc390_laststatus |= /* dstatus<<24 | */ sstatus<<16 | istate<<8 | istatus;

    if (sstatus & ILLEGAL_OP_ERR)
    {
	printk ("DC390: Illegal Operation detected (%08x)!\n", dc390_laststatus);
	dc390_dumpinfo (pACB, pACB->pActiveDCB, pACB->pActiveDCB->pActiveSRB);
    }
	
    else if (istatus &  INVALID_CMD)
    {
	printk ("DC390: Invalid Command detected (%08x)!\n", dc390_laststatus);
	dc390_InvalidCmd( pACB );
	goto unlock;
    }

    if (istatus &  SCSI_RESET)
    {
	dc390_ScsiRstDetect( pACB );
	goto unlock;
    }

    if (istatus &  DISCONNECTED)
    {
	dc390_Disconnect( pACB );
	goto unlock;
    }

    if (istatus &  RESELECTED)
    {
	dc390_Reselect( pACB );
	goto unlock;
    }

    else if (istatus & (SELECTED | SEL_ATTENTION))
    {
	printk (KERN_ERR "DC390: Target mode not supported!\n");
	goto unlock;
    }

    if (istatus & (SUCCESSFUL_OP|SERVICE_REQUEST) )
    {
	pDCB = pACB->pActiveDCB;
	if (!pDCB)
	{
		printk (KERN_ERR "DC390: Suc. op/ Serv. req: pActiveDCB = 0!\n");
		goto unlock;
	}
	pSRB = pDCB->pActiveSRB;
	if( pDCB->DCBFlag & ABORT_DEV_ )
	  dc390_EnableMsgOut_Abort (pACB, pSRB);

	phase = pSRB->ScsiPhase;
	DEBUG1(printk (KERN_INFO "DC390: [%i]%s(0) (%02x)\n", phase, dc390_p0_str[phase], sstatus));
	stateV = (void *) dc390_phase0[phase];
	( *stateV )( pACB, pSRB, &sstatus );

	pSRB->ScsiPhase = sstatus & 7;
	phase = (u8) sstatus & 7;
	DEBUG1(printk (KERN_INFO "DC390: [%i]%s(1) (%02x)\n", phase, dc390_p1_str[phase], sstatus));
	stateV = (void *) dc390_phase1[phase];
	( *stateV )( pACB, pSRB, &sstatus );
    }

 unlock:
    spin_unlock_irq(pACB->pScsiHost->host_lock);
    return IRQ_HANDLED;
}

static irqreturn_t do_DC390_Interrupt(int irq, void *dev_id)
{
    irqreturn_t ret;
    DEBUG1(printk (KERN_INFO "DC390: Irq (%i) caught: ", irq));
    /* Locking is done in DC390_Interrupt */
    ret = DC390_Interrupt(dev_id);
    DEBUG1(printk (".. IRQ returned\n"));
    return ret;
}

static void
dc390_DataOut_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
    u8   sstatus;
    u32  ResidCnt;
    u8   dstate = 0;

    sstatus = *psstatus;

    if( !(pSRB->SRBState & SRB_XFERPAD) )
    {
	if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR) )
	    pSRB->SRBStatus |= PARITY_ERROR;

	if( sstatus & COUNT_2_ZERO )
	{
	    unsigned long timeout = jiffies + HZ;

	    /* Function called from the ISR with the host_lock held and interrupts disabled */
	    if (pSRB->SGToBeXferLen)
		while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
		    spin_unlock_irq(pACB->pScsiHost->host_lock);
		    udelay(50);
		    spin_lock_irq(pACB->pScsiHost->host_lock);
		}
	    if (!time_before(jiffies, timeout))
		printk (KERN_CRIT "DC390: Deadlock in DataOut_0: DMA aborted unfinished: %06x bytes remain!!\n",
			DC390_read32 (DMA_Wk_ByteCntr));
	    dc390_laststatus &= ~0xff000000;
	    dc390_laststatus |= dstate << 24;
	    pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
	    pSRB->SGIndex++;
	    if( pSRB->SGIndex < pSRB->SGcount )
	    {
		pSRB->pSegmentList++;

		dc390_start_segment(pSRB);
	    }
	    else
		pSRB->SGToBeXferLen = 0;
	}
	else
	{
	    ResidCnt = ((u32) DC390_read8 (Current_Fifo) & 0x1f) +
		    (((u32) DC390_read8 (CtcReg_High) << 16) |
		     ((u32) DC390_read8 (CtcReg_Mid) << 8) |
		     (u32) DC390_read8 (CtcReg_Low));

	    dc390_advance_segment(pSRB, ResidCnt);
	}
    }
    if ((*psstatus & 7) != SCSI_DATA_OUT)
    {
	    DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD);
	    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
    }	    
}

static void
dc390_DataIn_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
    u8   sstatus, residual, bval;
    u32  ResidCnt, i;
    unsigned long   xferCnt;

    sstatus = *psstatus;

    if( !(pSRB->SRBState & SRB_XFERPAD) )
    {
	if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR))
	    pSRB->SRBStatus |= PARITY_ERROR;

	if( sstatus & COUNT_2_ZERO )
	{
	    int dstate = 0;
	    unsigned long timeout = jiffies + HZ;

	    /* Function called from the ISR with the host_lock held and interrupts disabled */
	    if (pSRB->SGToBeXferLen)
		while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
		    spin_unlock_irq(pACB->pScsiHost->host_lock);
		    udelay(50);
		    spin_lock_irq(pACB->pScsiHost->host_lock);
		}
	    if (!time_before(jiffies, timeout)) {
		printk (KERN_CRIT "DC390: Deadlock in DataIn_0: DMA aborted unfinished: %06x bytes remain!!\n",
			DC390_read32 (DMA_Wk_ByteCntr));
		printk (KERN_CRIT "DC390: DataIn_0: DMA State: %i\n", dstate);
	    }
	    dc390_laststatus &= ~0xff000000;
	    dc390_laststatus |= dstate << 24;
	    DEBUG1(ResidCnt = ((unsigned long) DC390_read8 (CtcReg_High) << 16)	\
		+ ((unsigned long) DC390_read8 (CtcReg_Mid) << 8)		\
		+ ((unsigned long) DC390_read8 (CtcReg_Low)));
	    DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%u,ToBeXfer=%lu),", ResidCnt, pSRB->SGToBeXferLen));

	    DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);

	    pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
	    pSRB->SGIndex++;
	    if( pSRB->SGIndex < pSRB->SGcount )
	    {
		pSRB->pSegmentList++;

		dc390_start_segment(pSRB);
	    }
	    else
		pSRB->SGToBeXferLen = 0;
	}
	else	/* phase changed */
	{
	    residual = 0;
	    bval = DC390_read8 (Current_Fifo);
	    while( bval & 0x1f )
	    {
		DEBUG1(printk (KERN_DEBUG "Check for residuals,"));
		if( (bval & 0x1f) == 1 )
		{
		    for(i=0; i < 0x100; i++)
		    {
			bval = DC390_read8 (Current_Fifo);
			if( !(bval & 0x1f) )
			    goto din_1;
			else if( i == 0x0ff )
			{
			    residual = 1;   /* ;1 residual byte */
			    goto din_1;
			}
		    }
		}
		else
		    bval = DC390_read8 (Current_Fifo);
	    }
din_1:
	    DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_BLAST_CMD);
	    for (i = 0xa000; i; i--)
	    {
		bval = DC390_read8 (DMA_Status);
		if (bval & BLAST_COMPLETE)
		    break;
	    }
	    /* It seems a DMA Blast abort isn't that bad ... */
	    if (!i) printk (KERN_ERR "DC390: DMA Blast aborted unfinished!\n");
	    //DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
	    dc390_laststatus &= ~0xff000000;
	    dc390_laststatus |= bval << 24;

	    DEBUG1(printk (KERN_DEBUG "Blast: Read %i times DMA_Status %02x", 0xa000-i, bval));
	    ResidCnt = (((u32) DC390_read8 (CtcReg_High) << 16) |
			((u32) DC390_read8 (CtcReg_Mid) << 8)) |
		    (u32) DC390_read8 (CtcReg_Low);

	    xferCnt = dc390_advance_segment(pSRB, ResidCnt);

	    if (residual) {
		size_t count = 1;
		size_t offset = pSRB->SGBusAddr - sg_dma_address(pSRB->pSegmentList);
		unsigned long flags;
		u8 *ptr;

		bval = DC390_read8 (ScsiFifo);	    /* get one residual byte */

		local_irq_save(flags);
		ptr = scsi_kmap_atomic_sg(pSRB->pSegmentList, pSRB->SGcount, &offset, &count);
		if (likely(ptr)) {
			*(ptr + offset) = bval;
			scsi_kunmap_atomic_sg(ptr);
		}
		local_irq_restore(flags);
		WARN_ON(!ptr);

		/* 1 more byte read */
		xferCnt += dc390_advance_segment(pSRB, pSRB->SGToBeXferLen - 1);
	    }
	    DEBUG1(printk (KERN_DEBUG "Xfered: %lu, Total: %lu, Remaining: %lu\n", xferCnt,\
			   pSRB->TotalXferredLen, pSRB->SGToBeXferLen));
	}
    }
    if ((*psstatus & 7) != SCSI_DATA_IN)
    {
	    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
	    DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
    }
}

static void
dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
}

static void
dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{

    pSRB->TargetStatus = DC390_read8 (ScsiFifo);
    //udelay (1);
    pSRB->EndMessage = DC390_read8 (ScsiFifo);	/* get message */

    *psstatus = SCSI_NOP0;
    pSRB->SRBState = SRB_COMPLETED;
    DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
}

static void
dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
    if( pSRB->SRBState & (SRB_UNEXPECT_RESEL+SRB_ABORT_SENT) )
	*psstatus = SCSI_NOP0;
    //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
}


static void __inline__
dc390_reprog (struct dc390_acb* pACB, struct dc390_dcb* pDCB)
{
  DC390_write8 (Sync_Period, pDCB->SyncPeriod);
  DC390_write8 (Sync_Offset, pDCB->SyncOffset);
  DC390_write8 (CtrlReg3, pDCB->CtrlR3);
  DC390_write8 (CtrlReg4, pDCB->CtrlR4);
  dc390_SetXferRate (pACB, pDCB);
}


#ifdef DC390_DEBUG0
static void
dc390_printMsg (u8 *MsgBuf, u8 len)
{
  int i;
  printk (" %02x", MsgBuf[0]);
  for (i = 1; i < len; i++)
    printk (" %02x", MsgBuf[i]);
  printk ("\n");
}
#endif

#define DC390_ENABLE_MSGOUT DC390_write8 (ScsiCmd, SET_ATN_CMD)

/* reject_msg */
static void __inline__
dc390_MsgIn_reject (struct dc390_acb* pACB, struct dc390_srb* pSRB)
{
  pSRB->MsgOutBuf[0] = MESSAGE_REJECT;
  pSRB->MsgCnt = 1;
  DC390_ENABLE_MSGOUT;
  DEBUG0 (printk (KERN_INFO "DC390: Reject message\n"));
}

/* abort command */
static void
dc390_EnableMsgOut_Abort ( struct dc390_acb* pACB, struct dc390_srb* pSRB )
{
    pSRB->MsgOutBuf[0] = ABORT; 
    pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
    pSRB->pSRBDCB->DCBFlag &= ~ABORT_DEV_;
}

static struct dc390_srb*
dc390_MsgIn_QTag (struct dc390_acb* pACB, struct dc390_dcb* pDCB, s8 tag)
{
  struct dc390_srb* pSRB = pDCB->pGoingSRB;

  if (pSRB)
    {
	struct scsi_cmnd *scmd = scsi_find_tag(pSRB->pcmd->device, tag);
	pSRB = (struct dc390_srb *)scmd->host_scribble;

	if (pDCB->DCBFlag & ABORT_DEV_)
	{
	  pSRB->SRBState = SRB_ABORT_SENT;
	  dc390_EnableMsgOut_Abort( pACB, pSRB );
	}

	if (!(pSRB->SRBState & SRB_DISCONNECT))
		goto mingx0;

	pDCB->pActiveSRB = pSRB;
	pSRB->SRBState = SRB_DATA_XFER;
    }
  else
    {
    mingx0:
      pSRB = pACB->pTmpSRB;
      pSRB->SRBState = SRB_UNEXPECT_RESEL;
      pDCB->pActiveSRB = pSRB;
      pSRB->MsgOutBuf[0] = ABORT_TAG;
      pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
    }
  return pSRB;
}


/* set async transfer mode */
static void 
dc390_MsgIn_set_async (struct dc390_acb* pACB, struct dc390_srb* pSRB)
{
  struct dc390_dcb* pDCB = pSRB->pSRBDCB;
  if (!(pSRB->SRBState & DO_SYNC_NEGO)) 
    printk (KERN_INFO "DC390: Target %i initiates Non-Sync?\n", pDCB->TargetID);
  pSRB->SRBState &= ~DO_SYNC_NEGO;
  pDCB->SyncMode &= ~(SYNC_ENABLE+SYNC_NEGO_DONE);
  pDCB->SyncPeriod = 0;
  pDCB->SyncOffset = 0;
  //pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
  pDCB->CtrlR3 = FAST_CLK;	/* fast clock / normal scsi */
  pDCB->CtrlR4 &= 0x3f;
  pDCB->CtrlR4 |= pACB->glitch_cfg;	/* glitch eater */
  dc390_reprog (pACB, pDCB);
}

/* set sync transfer mode */
static void
dc390_MsgIn_set_sync (struct dc390_acb* pACB, struct dc390_srb* pSRB)
{
  u8 bval;
  u16 wval, wval1;
  struct dc390_dcb* pDCB = pSRB->pSRBDCB;
  u8 oldsyncperiod = pDCB->SyncPeriod;
  u8 oldsyncoffset = pDCB->SyncOffset;
  
  if (!(pSRB->SRBState & DO_SYNC_NEGO))
    {
      printk (KERN_INFO "DC390: Target %i initiates Sync: %ins %i ... answer ...\n", 
	      pDCB->TargetID, pSRB->MsgInBuf[3]<<2, pSRB->MsgInBuf[4]);

      /* reject */
      //dc390_MsgIn_reject (pACB, pSRB);
      //return dc390_MsgIn_set_async (pACB, pSRB);

      /* Reply with corrected SDTR Message */
      if (pSRB->MsgInBuf[4] > 15)
	{ 
	  printk (KERN_INFO "DC390: Lower Sync Offset to 15\n");
	  pSRB->MsgInBuf[4] = 15;
	}
      if (pSRB->MsgInBuf[3] < pDCB->NegoPeriod)
	{
	  printk (KERN_INFO "DC390: Set sync nego period to %ins\n", pDCB->NegoPeriod << 2);
	  pSRB->MsgInBuf[3] = pDCB->NegoPeriod;
	}
      memcpy (pSRB->MsgOutBuf, pSRB->MsgInBuf, 5);
      pSRB->MsgCnt = 5;
      DC390_ENABLE_MSGOUT;
    }

  pSRB->SRBState &= ~DO_SYNC_NEGO;
  pDCB->SyncMode |= SYNC_ENABLE+SYNC_NEGO_DONE;
  pDCB->SyncOffset &= 0x0f0;
  pDCB->SyncOffset |= pSRB->MsgInBuf[4];
  pDCB->NegoPeriod = pSRB->MsgInBuf[3];

  wval = (u16) pSRB->MsgInBuf[3];
  wval = wval << 2; wval -= 3; wval1 = wval / 25;	/* compute speed */
  if( (wval1 * 25) != wval) wval1++;
  bval = FAST_CLK+FAST_SCSI;	/* fast clock / fast scsi */

  pDCB->CtrlR4 &= 0x3f;		/* Glitch eater: 12ns less than normal */
  if (pACB->glitch_cfg != NS_TO_GLITCH(0))
    pDCB->CtrlR4 |= NS_TO_GLITCH(((GLITCH_TO_NS(pACB->glitch_cfg)) - 1));
  else
    pDCB->CtrlR4 |= NS_TO_GLITCH(0);
  if (wval1 < 4) pDCB->CtrlR4 |= NS_TO_GLITCH(0); /* Ultra */

  if (wval1 >= 8)
    {
      wval1--;	/* Timing computation differs by 1 from FAST_SCSI */
      bval = FAST_CLK;		/* fast clock / normal scsi */
      pDCB->CtrlR4 |= pACB->glitch_cfg; 	/* glitch eater */
    }

  pDCB->CtrlR3 = bval;
  pDCB->SyncPeriod = (u8)wval1;
  
  if ((oldsyncperiod != wval1 || oldsyncoffset != pDCB->SyncOffset) && pDCB->TargetLUN == 0)
    {
      if (! (bval & FAST_SCSI)) wval1++;
      printk (KERN_INFO "DC390: Target %i: Sync transfer %i.%1i MHz, Offset %i\n", pDCB->TargetID, 
	      40/wval1, ((40%wval1)*10+wval1/2)/wval1, pDCB->SyncOffset & 0x0f);
    }
  
  dc390_reprog (pACB, pDCB);
}


/* handle RESTORE_PTR */
/* This doesn't look very healthy... to-be-fixed */
static void 
dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
{
    struct scsi_cmnd *pcmd = pSRB->pcmd;
    struct scatterlist *psgl;
    pSRB->TotalXferredLen = 0;
    pSRB->SGIndex = 0;
    if (scsi_sg_count(pcmd)) {
	size_t saved;
	pSRB->pSegmentList = scsi_sglist(pcmd);
	psgl = pSRB->pSegmentList;
	//dc390_pci_sync(pSRB);

	while (pSRB->TotalXferredLen + (unsigned long) sg_dma_len(psgl) < pSRB->Saved_Ptr)
	{
	    pSRB->TotalXferredLen += (unsigned long) sg_dma_len(psgl);
	    pSRB->SGIndex++;
	    if( pSRB->SGIndex < pSRB->SGcount )
	    {
		pSRB->pSegmentList++;

		dc390_start_segment(pSRB);
	    }
	    else
		pSRB->SGToBeXferLen = 0;
	}

	saved = pSRB->Saved_Ptr - pSRB->TotalXferredLen;
	pSRB->SGToBeXferLen -= saved;
	pSRB->SGBusAddr += saved;
	printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n",
		pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr);

    } else {
	 pSRB->SGcount = 0;
	 printk (KERN_INFO "DC390: RESTORE_PTR message for Transfer without Scatter-Gather ??\n");
    }

  pSRB->TotalXferredLen = pSRB->Saved_Ptr;
}


/* According to the docs, the AM53C974 reads the message and 
 * generates a Successful Operation IRQ before asserting ACK for
 * the last byte (how does it know whether it's the last ?) */
/* The old code handled it in another way, indicating, that on
 * every message byte an IRQ is generated and every byte has to
 * be manually ACKed. Hmmm ?  (KG, 98/11/28) */
/* The old implementation was correct. Sigh! */

/* Check if the message is complete */
static u8 __inline__
dc390_MsgIn_complete (u8 *msgbuf, u32 len)
{ 
  if (*msgbuf == EXTENDED_MESSAGE)
  {
	if (len < 2) return 0;
	if (len < msgbuf[1] + 2) return 0;
  }
  else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) // two byte messages
	if (len < 2) return 0;
  return 1;
}



/* read and eval received messages */
static void
dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
    struct dc390_dcb*   pDCB = pACB->pActiveDCB;

    /* Read the msg */

    pSRB->MsgInBuf[pACB->MsgLen++] = DC390_read8 (ScsiFifo);
    //pSRB->SRBState = 0;

    /* Msg complete ? */
    if (dc390_MsgIn_complete (pSRB->MsgInBuf, pACB->MsgLen))
      {
	DEBUG0 (printk (KERN_INFO "DC390: MsgIn:"); dc390_printMsg (pSRB->MsgInBuf, pACB->MsgLen));
	/* Now eval the msg */
	switch (pSRB->MsgInBuf[0]) 
	  {
	  case DISCONNECT: 
	    pSRB->SRBState = SRB_DISCONNECT; break;
	    
	  case SIMPLE_QUEUE_TAG:
	  case HEAD_OF_QUEUE_TAG:
	  case ORDERED_QUEUE_TAG:
	    pSRB = dc390_MsgIn_QTag (pACB, pDCB, pSRB->MsgInBuf[1]);
	    break;
	    
	  case MESSAGE_REJECT: 
	    DC390_write8 (ScsiCmd, RESET_ATN_CMD);
	    pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
	    if( pSRB->SRBState & DO_SYNC_NEGO)
	      dc390_MsgIn_set_async (pACB, pSRB);
	    break;
	    
	  case EXTENDED_MESSAGE:
	    /* reject every extended msg but SDTR */
	    if (pSRB->MsgInBuf[1] != 3 || pSRB->MsgInBuf[2] != EXTENDED_SDTR)
	      dc390_MsgIn_reject (pACB, pSRB);
	    else
	      {
		if (pSRB->MsgInBuf[3] == 0 || pSRB->MsgInBuf[4] == 0)
		  dc390_MsgIn_set_async (pACB, pSRB);
		else
		  dc390_MsgIn_set_sync (pACB, pSRB);
	      }
	    
	    // nothing has to be done
	  case COMMAND_COMPLETE: break;
	    
	    // SAVE POINTER may be ignored as we have the struct dc390_srb* associated with the
	    // scsi command. Thanks, Gerard, for pointing it out.
	  case SAVE_POINTERS: 
	    pSRB->Saved_Ptr = pSRB->TotalXferredLen;
	    break;
	    // The device might want to restart transfer with a RESTORE
	  case RESTORE_POINTERS:
	    DEBUG0(printk ("DC390: RESTORE POINTER message received ... try to handle\n"));
	    dc390_restore_ptr (pACB, pSRB);
	    break;

	    // reject unknown messages
	  default: dc390_MsgIn_reject (pACB, pSRB);
	  }
	
	/* Clear counter and MsgIn state */
	pSRB->SRBState &= ~SRB_MSGIN;
	pACB->MsgLen = 0;
      }

    *psstatus = SCSI_NOP0;
    DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
    //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
}


static void
dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
{
    unsigned long  lval;
    struct dc390_dcb*   pDCB = pACB->pActiveDCB;

    if (pSRB == pACB->pTmpSRB)
    {
	if (pDCB)
		printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (%02i-%i)\n", pDCB->TargetID, pDCB->TargetLUN);
	else
		printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (DCB 0!)\n");

	/* Try to recover - some broken disks react badly to tagged INQUIRY */
	if (pDCB && pACB->scan_devices && pDCB->GoingSRBCnt == 1) {
		pSRB = pDCB->pGoingSRB;
		pDCB->pActiveSRB = pSRB;
	} else {
		pSRB->pSRBDCB = pDCB;
		dc390_EnableMsgOut_Abort(pACB, pSRB);
		if (pDCB)
			pDCB->DCBFlag |= ABORT_DEV;
		return;
	}
    }

    if( pSRB->SGIndex < pSRB->SGcount )
    {
	DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
	if( !pSRB->SGToBeXferLen )
	{
	    dc390_start_segment(pSRB);

	    DEBUG1(printk (KERN_DEBUG " DC390: Next SG segment."));
	}
	lval = pSRB->SGToBeXferLen;
	DEBUG1(printk (KERN_DEBUG " DC390: Start transfer: %li bytes (address %08lx)\n", lval, pSRB->SGBusAddr));
	DC390_write8 (CtcReg_Low, (u8) lval);
	lval >>= 8;
	DC390_write8 (CtcReg_Mid, (u8) lval);
	lval >>= 8;
	DC390_write8 (CtcReg_High, (u8) lval);

	DC390_write32 (DMA_XferCnt, pSRB->SGToBeXferLen);
	DC390_write32 (DMA_XferAddr, pSRB->SGBusAddr);

	//DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
	pSRB->SRBState = SRB_DATA_XFER;

	DC390_write8 (ScsiCmd, DMA_COMMAND+INFO_XFER_CMD);

	DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
	//DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT));
	//DEBUG1(printk (KERN_DEBUG "DC390: DMA_Status: %02x\n", DC390_read8 (DMA_Status)));
	//DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT));
    }
    else    /* xfer pad */
    {
	if( pSRB->SGcount )
	{
	    pSRB->AdaptStatus = H_OVER_UNDER_RUN;
	    pSRB->SRBStatus |= OVER_RUN;
	    DEBUG0(printk (KERN_WARNING " DC390: Overrun -"));
	}
	DEBUG0(printk (KERN_WARNING " Clear transfer pad \n"));
	DC390_write8 (CtcReg_Low, 0);
	DC390_write8 (CtcReg_Mid, 0);
	DC390_write8 (CtcReg_High, 0);

	pSRB->SRBState |= SRB_XFERPAD;
	DC390_write8 (ScsiCmd, DMA_COMMAND+XFER_PAD_BYTE);
/*
	DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
	DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
*/
    }
}


static void
dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
    dc390_DataIO_Comm (pACB, pSRB, WRITE_DIRECTION);
}

static void
dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
    dc390_DataIO_Comm (pACB, pSRB, READ_DIRECTION);
}

static void
dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
    struct dc390_dcb*   pDCB;
    u8  i, cnt;
    u8     *ptr;

    DC390_write8 (ScsiCmd, RESET_ATN_CMD);
    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
    if( !(pSRB->SRBFlag & AUTO_REQSENSE) )
    {
	cnt = (u8) pSRB->pcmd->cmd_len;
	ptr = (u8 *) pSRB->pcmd->cmnd;
	for(i=0; i < cnt; i++)
	    DC390_write8 (ScsiFifo, *(ptr++));
    }
    else
    {
	DC390_write8 (ScsiFifo, REQUEST_SENSE);
	pDCB = pACB->pActiveDCB;
	DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
	DC390_write8 (ScsiFifo, 0);
	DC390_write8 (ScsiFifo, 0);
	DC390_write8 (ScsiFifo, SCSI_SENSE_BUFFERSIZE);
	DC390_write8 (ScsiFifo, 0);
	DEBUG0(printk(KERN_DEBUG "DC390: AutoReqSense (CmndPhase)!\n"));
    }
    pSRB->SRBState = SRB_COMMAND;
    DC390_write8 (ScsiCmd, INFO_XFER_CMD);
}

static void
dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
    pSRB->SRBState = SRB_STATUS;
    DC390_write8 (ScsiCmd, INITIATOR_CMD_CMPLTE);
    //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
}

static void
dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
    u8   bval, i, cnt;
    u8     *ptr;
    struct dc390_dcb*    pDCB;

    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
    pDCB = pACB->pActiveDCB;
    if( !(pSRB->SRBState & SRB_MSGOUT) )
    {
	cnt = pSRB->MsgCnt;
	if( cnt )
	{
	    ptr = (u8 *) pSRB->MsgOutBuf;
	    for(i=0; i < cnt; i++)
		DC390_write8 (ScsiFifo, *(ptr++));
	    pSRB->MsgCnt = 0;
	    if( (pDCB->DCBFlag & ABORT_DEV_) &&
		(pSRB->MsgOutBuf[0] == ABORT) )
		pSRB->SRBState = SRB_ABORT_SENT;
	}
	else
	{
	    bval = ABORT;	/* ??? MSG_NOP */
	    if( (pSRB->pcmd->cmnd[0] == INQUIRY ) ||
		(pSRB->pcmd->cmnd[0] == REQUEST_SENSE) ||
		(pSRB->SRBFlag & AUTO_REQSENSE) )
	    {
		if( pDCB->SyncMode & SYNC_ENABLE )
		    goto  mop1;
	    }
	    DC390_write8 (ScsiFifo, bval);
	}
	DC390_write8 (ScsiCmd, INFO_XFER_CMD);
    }
    else
    {
mop1:
        printk (KERN_ERR "DC390: OLD Sync Nego code triggered! (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN);
	DC390_write8 (ScsiFifo, EXTENDED_MESSAGE);
	DC390_write8 (ScsiFifo, 3);	/*    ;length of extended msg */
	DC390_write8 (ScsiFifo, EXTENDED_SDTR);	/*    ; sync nego */
	DC390_write8 (ScsiFifo, pDCB->NegoPeriod);
	if (pDCB->SyncOffset & 0x0f)
		    DC390_write8 (ScsiFifo, pDCB->SyncOffset);
	else
		    DC390_write8 (ScsiFifo, SYNC_NEGO_OFFSET);		    
	pSRB->SRBState |= DO_SYNC_NEGO;
	DC390_write8 (ScsiCmd, INFO_XFER_CMD);
    }
}

static void
dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
    if( !(pSRB->SRBState & SRB_MSGIN) )
    {
	pSRB->SRBState &= ~SRB_DISCONNECT;
	pSRB->SRBState |= SRB_MSGIN;
    }
    DC390_write8 (ScsiCmd, INFO_XFER_CMD);
    //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
}

static void
dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
}

static void
dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
{
}


static void
dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB )
{
    u8  bval, i, cnt;
    struct dc390_dcb*   ptr;

    if( !(pDCB->TargetLUN) )
    {
	if( !pACB->scan_devices )
	{
	    ptr = pACB->pLinkDCB;
	    cnt = pACB->DCBCnt;
	    bval = pDCB->TargetID;
	    for(i=0; i<cnt; i++)
	    {
		if( ptr->TargetID == bval )
		{
		    ptr->SyncPeriod = pDCB->SyncPeriod;
		    ptr->SyncOffset = pDCB->SyncOffset;
		    ptr->CtrlR3 = pDCB->CtrlR3;
		    ptr->CtrlR4 = pDCB->CtrlR4;
		    ptr->SyncMode = pDCB->SyncMode;
		}
		ptr = ptr->pNextDCB;
	    }
	}
    }
    return;
}


static void
dc390_Disconnect( struct dc390_acb* pACB )
{
    struct dc390_dcb *pDCB;
    struct dc390_srb *pSRB, *psrb;
    u8  i, cnt;

    DEBUG0(printk(KERN_INFO "DISC,"));

    if (!pACB->Connected) printk(KERN_ERR "DC390: Disconnect not-connected bus?\n");
    pACB->Connected = 0;
    pDCB = pACB->pActiveDCB;
    if (!pDCB)
     {
	DEBUG0(printk(KERN_ERR "ACB:%p->ActiveDCB:%p IOPort:%04x IRQ:%02x !\n",\
	       pACB, pDCB, pACB->IOPortBase, pACB->IRQLevel));
	mdelay(400);
	DC390_read8 (INT_Status);	/* Reset Pending INT */
	DC390_write8 (ScsiCmd, EN_SEL_RESEL);
	return;
     }
    DC390_write8 (ScsiCmd, EN_SEL_RESEL);
    pSRB = pDCB->pActiveSRB;
    pACB->pActiveDCB = NULL;
    pSRB->ScsiPhase = SCSI_NOP0;
    if( pSRB->SRBState & SRB_UNEXPECT_RESEL )
	pSRB->SRBState = 0;
    else if( pSRB->SRBState & SRB_ABORT_SENT )
    {
	pDCB->TagMask = 0;
	pDCB->DCBFlag = 0;
	cnt = pDCB->GoingSRBCnt;
	pDCB->GoingSRBCnt = 0;
	pSRB = pDCB->pGoingSRB;
	for( i=0; i < cnt; i++)
	{
	    psrb = pSRB->pNextSRB;
	    dc390_Free_insert (pACB, pSRB);
	    pSRB = psrb;
	}
	pDCB->pGoingSRB = NULL;
    }
    else
    {
	if( (pSRB->SRBState & (SRB_START_+SRB_MSGOUT)) ||
	   !(pSRB->SRBState & (SRB_DISCONNECT+SRB_COMPLETED)) )
	{	/* Selection time out */
		pSRB->AdaptStatus = H_SEL_TIMEOUT;
		pSRB->TargetStatus = 0;
		goto  disc1;
	}
	else if (!(pSRB->SRBState & SRB_DISCONNECT) && (pSRB->SRBState & SRB_COMPLETED))
	{
disc1:
	    dc390_freetag (pDCB, pSRB);
	    pDCB->pActiveSRB = NULL;
	    pSRB->SRBState = SRB_FREE;
	    dc390_SRBdone( pACB, pDCB, pSRB);
	}
    }
    pACB->MsgLen = 0;
}


static void
dc390_Reselect( struct dc390_acb* pACB )
{
    struct dc390_dcb*   pDCB;
    struct dc390_srb*   pSRB;
    u8  id, lun;

    DEBUG0(printk(KERN_INFO "RSEL,"));
    pACB->Connected = 1;
    pDCB = pACB->pActiveDCB;
    if( pDCB )
    {	/* Arbitration lost but Reselection won */
	DEBUG0(printk ("DC390: (ActiveDCB != 0: Arb. lost but resel. won)!\n"));
	pSRB = pDCB->pActiveSRB;
	if( !( pACB->scan_devices ) )
	{
	    struct scsi_cmnd *pcmd = pSRB->pcmd;
	    scsi_set_resid(pcmd, scsi_bufflen(pcmd));
	    SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
	    dc390_Going_remove(pDCB, pSRB);
	    dc390_Free_insert(pACB, pSRB);
	    pcmd->scsi_done (pcmd);
	    DEBUG0(printk(KERN_DEBUG"DC390: Return SRB %p to free\n", pSRB));
	}
    }
    /* Get ID */
    lun = DC390_read8 (ScsiFifo);
    DEBUG0(printk ("Dev %02x,", lun));
    if (!(lun & (1 << pACB->pScsiHost->this_id)))
      printk (KERN_ERR "DC390: Reselection must select host adapter: %02x!\n", lun);
    else
      lun ^= 1 << pACB->pScsiHost->this_id; /* Mask AdapterID */
    id = 0; while (lun >>= 1) id++;
    /* Get LUN */
    lun = DC390_read8 (ScsiFifo);
    if (!(lun & IDENTIFY_BASE)) printk (KERN_ERR "DC390: Resel: Expect identify message!\n");
    lun &= 7;
    DEBUG0(printk ("(%02i-%i),", id, lun));
    pDCB = dc390_findDCB (pACB, id, lun);
    if (!pDCB)
    {
	printk (KERN_ERR "DC390: Reselect from non existing device (%02i-%i)\n",
		    id, lun);
	return;
    }
    pACB->pActiveDCB = pDCB;
    /* TagQ: We expect a message soon, so never mind the exact SRB */
    if( pDCB->SyncMode & EN_TAG_QUEUEING )
    {
	pSRB = pACB->pTmpSRB;
	pDCB->pActiveSRB = pSRB;
    }
    else
    {
	pSRB = pDCB->pActiveSRB;
	if( !pSRB || !(pSRB->SRBState & SRB_DISCONNECT) )
	{
	    pSRB= pACB->pTmpSRB;
	    pSRB->SRBState = SRB_UNEXPECT_RESEL;
	    printk (KERN_ERR "DC390: Reselect without outstanding cmnd (%02i-%i)\n",
		    id, lun);
	    pDCB->pActiveSRB = pSRB;
	    dc390_EnableMsgOut_Abort ( pACB, pSRB );
	}
	else
	{
	    if( pDCB->DCBFlag & ABORT_DEV_ )
	    {
		pSRB->SRBState = SRB_ABORT_SENT;
		printk (KERN_INFO "DC390: Reselect: Abort (%02i-%i)\n",
			id, lun);
		dc390_EnableMsgOut_Abort( pACB, pSRB );
	    }
	    else
		pSRB->SRBState = SRB_DATA_XFER;
	}
    }

    DEBUG1(printk (KERN_DEBUG "Resel SRB(%p): TagNum (%02x)\n", pSRB, pSRB->TagNumber));
    pSRB->ScsiPhase = SCSI_NOP0;
    DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
    DC390_write8 (Sync_Period, pDCB->SyncPeriod);
    DC390_write8 (Sync_Offset, pDCB->SyncOffset);
    DC390_write8 (CtrlReg1, pDCB->CtrlR1);
    DC390_write8 (CtrlReg3, pDCB->CtrlR3);
    DC390_write8 (CtrlReg4, pDCB->CtrlR4);	/* ; Glitch eater */
    DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);	/* ;to release the /ACK signal */
}

static int __inline__
dc390_RequestSense(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
{
	struct scsi_cmnd *pcmd;

	pcmd = pSRB->pcmd;

	REMOVABLEDEBUG(printk(KERN_INFO "DC390: RequestSense(Cmd %02x, Id %02x, LUN %02x)\n",\
			      pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN));

	pSRB->SRBFlag |= AUTO_REQSENSE;
	pSRB->SavedTotXLen = pSRB->TotalXferredLen;
	pSRB->AdaptStatus = 0;
	pSRB->TargetStatus = 0; /* CHECK_CONDITION<<1; */

	/* We are called from SRBdone, original PCI mapping has been removed
	 * already, new one is set up from StartSCSI */
	pSRB->SGIndex = 0;

	pSRB->TotalXferredLen = 0;
	pSRB->SGToBeXferLen = 0;
	return dc390_StartSCSI(pACB, pDCB, pSRB);
}


static void
dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
{
    u8 status;
    struct scsi_cmnd *pcmd;

    pcmd = pSRB->pcmd;
    /* KG: Moved pci_unmap here */
    dc390_pci_unmap(pSRB);

    status = pSRB->TargetStatus;

    DEBUG0(printk (" SRBdone (%02x,%08x), SRB %p\n", status, pcmd->result, pSRB));
    if(pSRB->SRBFlag & AUTO_REQSENSE)
    {	/* Last command was a Request Sense */
	pSRB->SRBFlag &= ~AUTO_REQSENSE;
	pSRB->AdaptStatus = 0;
	pSRB->TargetStatus = SAM_STAT_CHECK_CONDITION;

	//pcmd->result = MK_RES(DRIVER_SENSE,DID_OK,0,status);
	if (status == SAM_STAT_CHECK_CONDITION)
	    pcmd->result = MK_RES_LNX(0, DID_BAD_TARGET, 0, /*CHECK_CONDITION*/0);
	else /* Retry */
	{
	    if( pSRB->pcmd->cmnd[0] == TEST_UNIT_READY /* || pSRB->pcmd->cmnd[0] == START_STOP */)
	    {
		/* Don't retry on TEST_UNIT_READY */
		pcmd->result = MK_RES_LNX(DRIVER_SENSE, DID_OK, 0, SAM_STAT_CHECK_CONDITION);
		REMOVABLEDEBUG(printk(KERN_INFO "Cmd=%02x, Result=%08x, XferL=%08x\n",pSRB->pcmd->cmnd[0],\
		       (u32) pcmd->result, (u32) pSRB->TotalXferredLen));
	    } else {
		SET_RES_DRV(pcmd->result, DRIVER_SENSE);
		//pSRB->ScsiCmdLen	 = (u8) (pSRB->Segment1[0] >> 8);
		DEBUG0 (printk ("DC390: RETRY (%02x), target %02i-%02i\n", pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
		pSRB->TotalXferredLen = 0;
		SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
	    }
	}
	goto cmd_done;
    }
    if( status )
    {
	if (status == SAM_STAT_CHECK_CONDITION)
	{
	    if (dc390_RequestSense(pACB, pDCB, pSRB)) {
		SET_RES_DID(pcmd->result, DID_ERROR);
		goto cmd_done;
	    }
	    return;
	}
	else if (status == SAM_STAT_TASK_SET_FULL)
	{
	    scsi_track_queue_full(pcmd->device, pDCB->GoingSRBCnt - 1);
	    DEBUG0 (printk ("DC390: RETRY (%02x), target %02i-%02i\n", pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
	    pSRB->TotalXferredLen = 0;
	    SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
	}
	else if (status == SAM_STAT_BUSY &&
		 (pcmd->cmnd[0] == TEST_UNIT_READY || pcmd->cmnd[0] == INQUIRY) &&
		 pACB->scan_devices)
	{
	    pSRB->AdaptStatus = 0;
	    pSRB->TargetStatus = status;
	    pcmd->result = MK_RES(0,0,pSRB->EndMessage,/*status*/0);
	}
	else
	{   /* Another error */
	    pSRB->TotalXferredLen = 0;
	    SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
	    goto cmd_done;
	}
    }
    else
    {	/*  Target status == 0 */
	status = pSRB->AdaptStatus;
	if (status == H_OVER_UNDER_RUN)
	{
	    pSRB->TargetStatus = 0;
	    SET_RES_DID(pcmd->result,DID_OK);
	    SET_RES_MSG(pcmd->result,pSRB->EndMessage);
	}
	else if (status == H_SEL_TIMEOUT)
	{
	    pcmd->result = MK_RES(0, DID_NO_CONNECT, 0, 0);
	    /* Devices are removed below ... */
	}
	else if( pSRB->SRBStatus & PARITY_ERROR)
	{
	    //pcmd->result = MK_RES(0,DID_PARITY,pSRB->EndMessage,0);
	    SET_RES_DID(pcmd->result,DID_PARITY);
	    SET_RES_MSG(pcmd->result,pSRB->EndMessage);
	}
	else		       /* No error */
	{
	    pSRB->AdaptStatus = 0;
	    pSRB->TargetStatus = 0;
	    SET_RES_DID(pcmd->result,DID_OK);
	}
    }

cmd_done:
    scsi_set_resid(pcmd, scsi_bufflen(pcmd) - pSRB->TotalXferredLen);

    dc390_Going_remove (pDCB, pSRB);
    /* Add to free list */
    dc390_Free_insert (pACB, pSRB);

    DEBUG0(printk (KERN_DEBUG "DC390: SRBdone: done\n"));
    pcmd->scsi_done (pcmd);

    return;
}


/* Remove all SRBs from Going list and inform midlevel */
static void
dc390_DoingSRB_Done(struct dc390_acb* pACB, struct scsi_cmnd *cmd)
{
    struct dc390_dcb *pDCB, *pdcb;
    struct dc390_srb *psrb, *psrb2;
    int i;
    struct scsi_cmnd *pcmd;

    pDCB = pACB->pLinkDCB;
    pdcb = pDCB;
    if (! pdcb) return;
    do
    {
	psrb = pdcb->pGoingSRB;
	for (i = 0; i < pdcb->GoingSRBCnt; i++)
	{
	    psrb2 = psrb->pNextSRB;
	    pcmd = psrb->pcmd;
	    dc390_Free_insert (pACB, psrb);
	    psrb  = psrb2;
	}
	pdcb->GoingSRBCnt = 0;
	pdcb->pGoingSRB = NULL;
	pdcb->TagMask = 0;
	pdcb = pdcb->pNextDCB;
    } while( pdcb != pDCB );
}


static void
dc390_ResetSCSIBus( struct dc390_acb* pACB )
{
    //DC390_write8 (ScsiCmd, RST_DEVICE_CMD);
    //udelay (250);
    //DC390_write8 (ScsiCmd, NOP_CMD);

    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
    DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
    DC390_write8 (ScsiCmd, RST_SCSI_BUS_CMD);
    pACB->Connected = 0;

    return;
}

static void
dc390_ScsiRstDetect( struct dc390_acb* pACB )
{
    printk ("DC390: Rst_Detect: laststat = %08x\n", dc390_laststatus);
    //DEBUG0(printk(KERN_INFO "RST_DETECT,"));

    DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
    /* Unlock before ? */
    /* delay half a second */
    udelay (1000);
    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
    pACB->last_reset = jiffies + 5*HZ/2
		    + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
    pACB->Connected = 0;

    if( pACB->ACBFlag & RESET_DEV )
	pACB->ACBFlag |= RESET_DONE;
    else
    {   /* Reset was issued by sb else */
	pACB->ACBFlag |= RESET_DETECT;

	dc390_ResetDevParam( pACB );
	dc390_DoingSRB_Done( pACB, NULL);
	//dc390_RecoverSRB( pACB );
	pACB->pActiveDCB = NULL;
	pACB->ACBFlag = 0;
    }
    return;
}

static int DC390_queuecommand_lck(struct scsi_cmnd *cmd,
		void (*done)(struct scsi_cmnd *))
{
	struct scsi_device *sdev = cmd->device;
	struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
	struct dc390_dcb *dcb = sdev->hostdata;
	struct dc390_srb *srb;

	if (sdev->queue_depth <= dcb->GoingSRBCnt)
		goto device_busy;
	if (acb->pActiveDCB)
		goto host_busy;
	if (acb->ACBFlag & (RESET_DETECT|RESET_DONE|RESET_DEV))
		goto host_busy;

	srb = acb->pFreeSRB;
	if (unlikely(srb == NULL))
		goto host_busy;

	cmd->scsi_done = done;
	cmd->result = 0;
	acb->Cmds++;

	acb->pFreeSRB = srb->pNextSRB;
	srb->pNextSRB = NULL;

	srb->pSRBDCB = dcb;
	srb->pcmd = cmd;
	cmd->host_scribble = (char *)srb;
    
	srb->SGIndex = 0;
	srb->AdaptStatus = 0;
	srb->TargetStatus = 0;
	srb->MsgCnt = 0;

	srb->SRBStatus = 0;
	srb->SRBFlag = 0;
	srb->SRBState = 0;
	srb->TotalXferredLen = 0;
	srb->SGBusAddr = 0;
	srb->SGToBeXferLen = 0;
	srb->ScsiPhase = 0;
	srb->EndMessage = 0;
	srb->TagNumber = SCSI_NO_TAG;

	if (dc390_StartSCSI(acb, dcb, srb)) {
		dc390_Free_insert(acb, srb);
		goto host_busy;
	}

	dc390_Going_append(dcb, srb);

	return 0;

 host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

 device_busy:
	return SCSI_MLQUEUE_DEVICE_BUSY;
}

static DEF_SCSI_QCMD(DC390_queuecommand)

static void dc390_dumpinfo (struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
{
    struct pci_dev *pdev;
    u16 pstat;

    if (!pDCB) pDCB = pACB->pActiveDCB;
    if (!pSRB && pDCB) pSRB = pDCB->pActiveSRB;

    if (pSRB) 
    {
	printk ("DC390: SRB: Xferred %08lx, Remain %08lx, State %08x, Phase %02x\n",
		pSRB->TotalXferredLen, pSRB->SGToBeXferLen, pSRB->SRBState,
		pSRB->ScsiPhase);
	printk ("DC390: AdpaterStatus: %02x, SRB Status %02x\n", pSRB->AdaptStatus, pSRB->SRBStatus);
    }
    printk ("DC390: Status of last IRQ (DMA/SC/Int/IRQ): %08x\n", dc390_laststatus);
    printk ("DC390: Register dump: SCSI block:\n");
    printk ("DC390: XferCnt  Cmd Stat IntS IRQS FFIS Ctl1 Ctl2 Ctl3 Ctl4\n");
    printk ("DC390:  %06x   %02x   %02x   %02x",
	    DC390_read8(CtcReg_Low) + (DC390_read8(CtcReg_Mid) << 8) + (DC390_read8(CtcReg_High) << 16),
	    DC390_read8(ScsiCmd), DC390_read8(Scsi_Status), DC390_read8(Intern_State));
    printk ("   %02x   %02x   %02x   %02x   %02x   %02x\n",
	    DC390_read8(INT_Status), DC390_read8(Current_Fifo), DC390_read8(CtrlReg1),
	    DC390_read8(CtrlReg2), DC390_read8(CtrlReg3), DC390_read8(CtrlReg4));
    DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
    if (DC390_read8(Current_Fifo) & 0x1f)
      {
	printk ("DC390: FIFO:");
	while (DC390_read8(Current_Fifo) & 0x1f) printk (" %02x", DC390_read8(ScsiFifo));
	printk ("\n");
      }
    printk ("DC390: Register dump: DMA engine:\n");
    printk ("DC390: Cmd   STrCnt    SBusA    WrkBC    WrkAC Stat SBusCtrl\n");
    printk ("DC390:  %02x %08x %08x %08x %08x   %02x %08x\n",
	    DC390_read8(DMA_Cmd), DC390_read32(DMA_XferCnt), DC390_read32(DMA_XferAddr),
	    DC390_read32(DMA_Wk_ByteCntr), DC390_read32(DMA_Wk_AddrCntr),
	    DC390_read8(DMA_Status), DC390_read32(DMA_ScsiBusCtrl));
    DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);

    pdev = pACB->pdev;
    pci_read_config_word(pdev, PCI_STATUS, &pstat);
    printk ("DC390: Register dump: PCI Status: %04x\n", pstat);
    printk ("DC390: In case of driver trouble read Documentation/scsi/tmscsim.txt\n");
}


static int DC390_abort(struct scsi_cmnd *cmd)
{
	struct dc390_acb *pACB = (struct dc390_acb*) cmd->device->host->hostdata;
	struct dc390_dcb *pDCB = (struct dc390_dcb*) cmd->device->hostdata;

	scmd_printk(KERN_WARNING, cmd, "DC390: Abort command\n");

	/* abort() is too stupid for already sent commands at the moment. 
	 * If it's called we are in trouble anyway, so let's dump some info 
	 * into the syslog at least. (KG, 98/08/20,99/06/20) */
	dc390_dumpinfo(pACB, pDCB, NULL);

	pDCB->DCBFlag |= ABORT_DEV_;
	printk(KERN_INFO "DC390: Aborted.\n");

	return FAILED;
}


static void dc390_ResetDevParam( struct dc390_acb* pACB )
{
    struct dc390_dcb *pDCB, *pdcb;

    pDCB = pACB->pLinkDCB;
    if (! pDCB) return;
    pdcb = pDCB;
    do
    {
	pDCB->SyncMode &= ~SYNC_NEGO_DONE;
	pDCB->SyncPeriod = 0;
	pDCB->SyncOffset = 0;
	pDCB->TagMask = 0;
	pDCB->CtrlR3 = FAST_CLK;
	pDCB->CtrlR4 &= NEGATE_REQACKDATA | CTRL4_RESERVED | NEGATE_REQACK;
	pDCB->CtrlR4 |= pACB->glitch_cfg;
	pDCB = pDCB->pNextDCB;
    }
    while( pdcb != pDCB );
    pACB->ACBFlag &= ~(RESET_DEV | RESET_DONE | RESET_DETECT);

}

static int DC390_bus_reset (struct scsi_cmnd *cmd)
{
	struct dc390_acb*    pACB = (struct dc390_acb*) cmd->device->host->hostdata;
	u8   bval;

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

	bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
	DC390_write8(CtrlReg1, bval);	/* disable IRQ on bus reset */

	pACB->ACBFlag |= RESET_DEV;
	dc390_ResetSCSIBus(pACB);

	dc390_ResetDevParam(pACB);
	mdelay(1);
	pACB->last_reset = jiffies + 3*HZ/2
		+ HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];

	DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
	DC390_read8(INT_Status);		/* Reset Pending INT */

	dc390_DoingSRB_Done(pACB, cmd);

	pACB->pActiveDCB = NULL;
	pACB->ACBFlag = 0;

	bval = DC390_read8(CtrlReg1) & ~DIS_INT_ON_SCSI_RST;
	DC390_write8(CtrlReg1, bval);	/* re-enable interrupt */

	spin_unlock_irq(cmd->device->host->host_lock);

	return SUCCESS;
}

/**
 * dc390_slave_alloc - Called by the scsi mid layer to tell us about a new
 * scsi device that we need to deal with.
 *
 * @scsi_device: The new scsi device that we need to handle.
 */
static int dc390_slave_alloc(struct scsi_device *scsi_device)
{
	struct dc390_acb *pACB = (struct dc390_acb*) scsi_device->host->hostdata;
	struct dc390_dcb *pDCB, *pDCB2 = NULL;
	uint id = scsi_device->id;
	uint lun = scsi_device->lun;

	pDCB = kzalloc(sizeof(struct dc390_dcb), GFP_KERNEL);
	if (!pDCB)
		return -ENOMEM;

	if (!pACB->DCBCnt++) {
		pACB->pLinkDCB = pDCB;
		pACB->pDCBRunRobin = pDCB;
	} else {
		pACB->pLastDCB->pNextDCB = pDCB;
	}
   
	pDCB->pNextDCB = pACB->pLinkDCB;
	pACB->pLastDCB = pDCB;

	pDCB->pDCBACB = pACB;
	pDCB->TargetID = id;
	pDCB->TargetLUN = lun;

	/*
	 * Some values are for all LUNs: Copy them 
	 * In a clean way: We would have an own structure for a SCSI-ID 
	 */
	if (lun && (pDCB2 = dc390_findDCB(pACB, id, 0))) {
		pDCB->DevMode = pDCB2->DevMode;
		pDCB->SyncMode = pDCB2->SyncMode & SYNC_NEGO_DONE;
		pDCB->SyncPeriod = pDCB2->SyncPeriod;
		pDCB->SyncOffset = pDCB2->SyncOffset;
		pDCB->NegoPeriod = pDCB2->NegoPeriod;
      
		pDCB->CtrlR3 = pDCB2->CtrlR3;
		pDCB->CtrlR4 = pDCB2->CtrlR4;
	} else {
		u8 index = pACB->AdapterIndex;
		PEEprom prom = (PEEprom) &dc390_eepromBuf[index][id << 2];

		pDCB->DevMode = prom->EE_MODE1;
		pDCB->NegoPeriod =
			(dc390_clock_period1[prom->EE_SPEED] * 25) >> 2;
		pDCB->CtrlR3 = FAST_CLK;
		pDCB->CtrlR4 = pACB->glitch_cfg | CTRL4_RESERVED;
		if (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION)
			pDCB->CtrlR4 |= NEGATE_REQACKDATA | NEGATE_REQACK;
	}

	if (pDCB->DevMode & SYNC_NEGO_)
		pDCB->SyncMode |= SYNC_ENABLE;
	else {
		pDCB->SyncMode = 0;
		pDCB->SyncOffset &= ~0x0f;
	}

	pDCB->CtrlR1 = pACB->pScsiHost->this_id;
	if (pDCB->DevMode & PARITY_CHK_)
		pDCB->CtrlR1 |= PARITY_ERR_REPO;

	pACB->scan_devices = 1;
	scsi_device->hostdata = pDCB;
	return 0;
}

/**
 * dc390_slave_destroy - Called by the scsi mid layer to tell us about a
 * device that is going away.
 *
 * @scsi_device: The scsi device that we need to remove.
 */
static void dc390_slave_destroy(struct scsi_device *scsi_device)
{
	struct dc390_acb* pACB = (struct dc390_acb*) scsi_device->host->hostdata;
	struct dc390_dcb* pDCB = (struct dc390_dcb*) scsi_device->hostdata;
	struct dc390_dcb* pPrevDCB = pACB->pLinkDCB;

	pACB->scan_devices = 0;

	BUG_ON(pDCB->GoingSRBCnt > 1);
	
	if (pDCB == pACB->pLinkDCB) {
		if (pACB->pLastDCB == pDCB) {
			pDCB->pNextDCB = NULL;
			pACB->pLastDCB = NULL;
		}
		pACB->pLinkDCB = pDCB->pNextDCB;
	} else {
		while (pPrevDCB->pNextDCB != pDCB)
			pPrevDCB = pPrevDCB->pNextDCB;
		pPrevDCB->pNextDCB = pDCB->pNextDCB;
		if (pDCB == pACB->pLastDCB)
			pACB->pLastDCB = pPrevDCB;
	}

	if (pDCB == pACB->pActiveDCB)
		pACB->pActiveDCB = NULL;
	if (pDCB == pACB->pLinkDCB)
		pACB->pLinkDCB = pDCB->pNextDCB;
	if (pDCB == pACB->pDCBRunRobin)
		pACB->pDCBRunRobin = pDCB->pNextDCB;
	kfree(pDCB); 
	
	pACB->DCBCnt--;
}

static int dc390_slave_configure(struct scsi_device *sdev)
{
	struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
	struct dc390_dcb *dcb = (struct dc390_dcb *)sdev->hostdata;

	acb->scan_devices = 0;
	if (sdev->tagged_supported && (dcb->DevMode & TAG_QUEUEING_)) {
		dcb->SyncMode |= EN_TAG_QUEUEING;
		scsi_activate_tcq(sdev, acb->TagMaxNum);
	}

	return 0;
}

static struct scsi_host_template driver_template = {
	.module			= THIS_MODULE,
	.proc_name		= "tmscsim", 
	.name			= DC390_BANNER " V" DC390_VERSION,
	.slave_alloc		= dc390_slave_alloc,
	.slave_configure	= dc390_slave_configure,
	.slave_destroy		= dc390_slave_destroy,
	.queuecommand		= DC390_queuecommand,
	.eh_abort_handler	= DC390_abort,
	.eh_bus_reset_handler	= DC390_bus_reset,
	.can_queue		= 1,
	.this_id		= 7,
	.sg_tablesize		= SG_ALL,
	.cmd_per_lun		= 1,
	.use_clustering		= ENABLE_CLUSTERING,
	.max_sectors		= 0x4000, /* 8MiB = 16 * 1024 * 512 */
};

/***********************************************************************
 * Functions for access to DC390 EEPROM
 * and some to emulate it
 *
 **********************************************************************/

static void dc390_eeprom_prepare_read(struct pci_dev *pdev, u8 cmd)
{
	u8 carryFlag = 1, j = 0x80, bval;
	int i;

	for (i = 0; i < 9; i++) {
		if (carryFlag) {
			pci_write_config_byte(pdev, 0x80, 0x40);
			bval = 0xc0;
		} else
			bval = 0x80;

		udelay(160);
		pci_write_config_byte(pdev, 0x80, bval);
		udelay(160);
		pci_write_config_byte(pdev, 0x80, 0);
		udelay(160);

		carryFlag = (cmd & j) ? 1 : 0;
		j >>= 1;
	}
}

static u16 dc390_eeprom_get_data(struct pci_dev *pdev)
{
	int i;
	u16 wval = 0;
	u8 bval;

	for (i = 0; i < 16; i++) {
		wval <<= 1;

		pci_write_config_byte(pdev, 0x80, 0x80);
		udelay(160);
		pci_write_config_byte(pdev, 0x80, 0x40);
		udelay(160);
		pci_read_config_byte(pdev, 0x00, &bval);

		if (bval == 0x22)
			wval |= 1;
	}

	return wval;
}

static void dc390_read_eeprom(struct pci_dev *pdev, u16 *ptr)
{
	u8 cmd = EEPROM_READ, i;

	for (i = 0; i < 0x40; i++) {
		pci_write_config_byte(pdev, 0xc0, 0);
		udelay(160);

		dc390_eeprom_prepare_read(pdev, cmd++);
		*ptr++ = dc390_eeprom_get_data(pdev);

		pci_write_config_byte(pdev, 0x80, 0);
		pci_write_config_byte(pdev, 0x80, 0);
		udelay(160);
	}
}

/* Override EEprom values with explicitly set values */
static void dc390_eeprom_override(u8 index)
{
	u8 *ptr = (u8 *) dc390_eepromBuf[index], id;

	/* Adapter Settings */
	if (tmscsim[0] != -2)
		ptr[EE_ADAPT_SCSI_ID] = (u8)tmscsim[0];	/* Adapter ID */
	if (tmscsim[3] != -2)
		ptr[EE_MODE2] = (u8)tmscsim[3];
	if (tmscsim[5] != -2)
		ptr[EE_DELAY] = tmscsim[5];		/* Reset delay */
	if (tmscsim[4] != -2)
		ptr[EE_TAG_CMD_NUM] = (u8)tmscsim[4];	/* Tagged Cmds */

	/* Device Settings */
	for (id = 0; id < MAX_SCSI_ID; id++) {
		if (tmscsim[2] != -2)
			ptr[id << 2] = (u8)tmscsim[2];		/* EE_MODE1 */
		if (tmscsim[1] != -2)
			ptr[(id << 2) + 1] = (u8)tmscsim[1];	/* EE_Speed */
	}
}

static int tmscsim_def[] = {
	7,
	0 /* 10MHz */,
	PARITY_CHK_ | SEND_START_ | EN_DISCONNECT_ | SYNC_NEGO_ | TAG_QUEUEING_,
	MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION | LUN_CHECK,
	3 /* 16 Tags per LUN */,
	1 /* s delay after Reset */,
};

/* Copy defaults over set values where missing */
static void dc390_fill_with_defaults (void)
{
	int i;

	for (i = 0; i < 6; i++) {
		if (tmscsim[i] < 0 || tmscsim[i] > 255)
			tmscsim[i] = tmscsim_def[i];
	}

	/* Sanity checks */
	if (tmscsim[0] > 7)
		tmscsim[0] = 7;
	if (tmscsim[1] > 7)
		tmscsim[1] = 4;
	if (tmscsim[4] > 5)
		tmscsim[4] = 4;
	if (tmscsim[5] > 180)
		tmscsim[5] = 180;
}

static void dc390_check_eeprom(struct pci_dev *pdev, u8 index)
{
	u8 interpd[] = {1, 3, 5, 10, 16, 30, 60, 120};
	u8 EEbuf[128];
	u16 *ptr = (u16 *)EEbuf, wval = 0;
	int i;

	dc390_read_eeprom(pdev, ptr);
	memcpy(dc390_eepromBuf[index], EEbuf, EE_ADAPT_SCSI_ID);
	memcpy(&dc390_eepromBuf[index][EE_ADAPT_SCSI_ID], 
	       &EEbuf[REAL_EE_ADAPT_SCSI_ID], EE_LEN - EE_ADAPT_SCSI_ID);

	dc390_eepromBuf[index][EE_DELAY] = interpd[dc390_eepromBuf[index][EE_DELAY]];

	for (i = 0; i < 0x40; i++, ptr++)
		wval += *ptr;

	/* no Tekram EEprom found */
	if (wval != 0x1234) {
		int speed;

		printk(KERN_INFO "DC390_init: No EEPROM found! Trying default settings ...\n");

		/*
		 * XXX(hch): bogus, because we might have tekram and
		 *           non-tekram hbas in a single machine.
		 */
		dc390_fill_with_defaults();

		speed = dc390_clock_speed[tmscsim[1]];
		printk(KERN_INFO "DC390: Used defaults: AdaptID=%i, SpeedIdx=%i (%i.%i MHz), "
		       "DevMode=0x%02x, AdaptMode=0x%02x, TaggedCmnds=%i (%i), DelayReset=%is\n", 
		       tmscsim[0], tmscsim[1], speed / 10, speed % 10,
		       (u8)tmscsim[2], (u8)tmscsim[3], tmscsim[4], 2 << (tmscsim[4]), tmscsim[5]);
	}
}

static void dc390_init_hw(struct dc390_acb *pACB, u8 index)
{
	struct Scsi_Host *shost = pACB->pScsiHost;
	u8 dstate;

	/* Disable SCSI bus reset interrupt */
	DC390_write8(CtrlReg1, DIS_INT_ON_SCSI_RST | shost->this_id);

	if (pACB->Gmode2 & RST_SCSI_BUS) {
		dc390_ResetSCSIBus(pACB);
		udelay(1000);
		pACB->last_reset = jiffies + HZ/2 +
			HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
	}

	pACB->ACBFlag = 0;

	/* Reset Pending INT */
	DC390_read8(INT_Status);
	
	/* 250ms selection timeout */
	DC390_write8(Scsi_TimeOut, SEL_TIMEOUT);
	
	/* Conversion factor = 0 , 40MHz clock */
	DC390_write8(Clk_Factor, CLK_FREQ_40MHZ);
	
	/* NOP cmd - clear command register */
	DC390_write8(ScsiCmd, NOP_CMD);
	
	/* Enable Feature and SCSI-2 */
	DC390_write8(CtrlReg2, EN_FEATURE+EN_SCSI2_CMD);
	
	/* Fast clock */
	DC390_write8(CtrlReg3, FAST_CLK);

	/* Negation */
	DC390_write8(CtrlReg4, pACB->glitch_cfg | /* glitch eater */
		(dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) ?
		 NEGATE_REQACKDATA : 0);
	
	/* Clear Transfer Count High: ID */
	DC390_write8(CtcReg_High, 0);
	DC390_write8(DMA_Cmd, DMA_IDLE_CMD);
	DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
	DC390_write32(DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);

	dstate = DC390_read8(DMA_Status);
	DC390_write8(DMA_Status, dstate);
}

static int dc390_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
	struct dc390_acb *pACB;
	struct Scsi_Host *shost;
	unsigned long io_port;
	int error = -ENODEV, i;

	if (pci_enable_device(pdev))
		goto out;

	pci_set_master(pdev);

	error = -ENOMEM;
	if (disable_clustering)
		driver_template.use_clustering = DISABLE_CLUSTERING;
	shost = scsi_host_alloc(&driver_template, sizeof(struct dc390_acb));
	if (!shost)
		goto out_disable_device;

	pACB = (struct dc390_acb *)shost->hostdata;
	memset(pACB, 0, sizeof(struct dc390_acb));

	dc390_check_eeprom(pdev, dc390_adapterCnt);
	dc390_eeprom_override(dc390_adapterCnt);

	io_port = pci_resource_start(pdev, 0);

	shost->this_id = dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID];
	shost->io_port = io_port;
	shost->n_io_port = 0x80;
	shost->irq = pdev->irq;
	shost->base = io_port;
	shost->unique_id = io_port;

	pACB->last_reset = jiffies;
	pACB->pScsiHost = shost;
	pACB->IOPortBase = (u16) io_port;
	pACB->IRQLevel = pdev->irq;
	
	shost->max_id = 8;

	if (shost->max_id - 1 ==
	    dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID])
		shost->max_id--;

	if (dc390_eepromBuf[dc390_adapterCnt][EE_MODE2] & LUN_CHECK)
		shost->max_lun = 8;
	else
		shost->max_lun = 1;

	pACB->pFreeSRB = pACB->SRB_array;
	pACB->SRBCount = MAX_SRB_CNT;
	pACB->AdapterIndex = dc390_adapterCnt;
	pACB->TagMaxNum =
		2 << dc390_eepromBuf[dc390_adapterCnt][EE_TAG_CMD_NUM];
	pACB->Gmode2 = dc390_eepromBuf[dc390_adapterCnt][EE_MODE2];

	for (i = 0; i < pACB->SRBCount-1; i++)
		pACB->SRB_array[i].pNextSRB = &pACB->SRB_array[i+1];
	pACB->SRB_array[pACB->SRBCount-1].pNextSRB = NULL;
	pACB->pTmpSRB = &pACB->TmpSRB;

	pACB->sel_timeout = SEL_TIMEOUT;
	pACB->glitch_cfg = EATER_25NS;
	pACB->pdev = pdev;

	if (!request_region(io_port, shost->n_io_port, "tmscsim")) {
		printk(KERN_ERR "DC390: register IO ports error!\n");
		goto out_host_put;
	}

	/* Reset Pending INT */
	DC390_read8_(INT_Status, io_port);

	if (request_irq(pdev->irq, do_DC390_Interrupt, IRQF_SHARED,
				"tmscsim", pACB)) {
		printk(KERN_ERR "DC390: register IRQ error!\n");
		goto out_release_region;
	}

	dc390_init_hw(pACB, dc390_adapterCnt);
	
	dc390_adapterCnt++;

	pci_set_drvdata(pdev, shost);

	error = scsi_add_host(shost, &pdev->dev);
	if (error)
		goto out_free_irq;
	scsi_scan_host(shost);
	return 0;

 out_free_irq:
	free_irq(pdev->irq, pACB);
 out_release_region:
	release_region(io_port, shost->n_io_port);
 out_host_put:
	scsi_host_put(shost);
 out_disable_device:
	pci_disable_device(pdev);
 out:
	return error;
}

/**
 * dc390_remove_one - Called to remove a single instance of the adapter.
 *
 * @dev: The PCI device to remove.
 */
static void dc390_remove_one(struct pci_dev *dev)
{
	struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
	unsigned long iflags;
	struct dc390_acb* pACB = (struct dc390_acb*) scsi_host->hostdata;
	u8 bval;

	scsi_remove_host(scsi_host);

	spin_lock_irqsave(scsi_host->host_lock, iflags);
	pACB->ACBFlag = RESET_DEV;
	bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
	DC390_write8 (CtrlReg1, bval);	/* disable interrupt */
	if (pACB->Gmode2 & RST_SCSI_BUS)
		dc390_ResetSCSIBus(pACB);
	spin_unlock_irqrestore(scsi_host->host_lock, iflags);

	free_irq(scsi_host->irq, pACB);
	release_region(scsi_host->io_port, scsi_host->n_io_port);

	pci_disable_device(dev);
	scsi_host_put(scsi_host);
}

static struct pci_device_id tmscsim_pci_tbl[] = {
	{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD53C974,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
	{ }
};
MODULE_DEVICE_TABLE(pci, tmscsim_pci_tbl);

static struct pci_driver dc390_driver = {
	.name           = "tmscsim",
	.id_table       = tmscsim_pci_tbl,
	.probe          = dc390_probe_one,
	.remove         = dc390_remove_one,
};

static int __init dc390_module_init(void)
{
	if (!disable_clustering) {
		printk(KERN_INFO "DC390: clustering now enabled by default. If you get problems load\n");
		printk(KERN_INFO "       with \"disable_clustering=1\" and report to maintainers\n");
	}

	if (tmscsim[0] == -1 || tmscsim[0] > 15) {
		tmscsim[0] = 7;
		tmscsim[1] = 4;
		tmscsim[2] = PARITY_CHK_ | TAG_QUEUEING_;
		tmscsim[3] = MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION;
		tmscsim[4] = 2;
		tmscsim[5] = 10;
		printk (KERN_INFO "DC390: Using safe settings.\n");
	}

	return pci_register_driver(&dc390_driver);
}

static void __exit dc390_module_exit(void)
{
	pci_unregister_driver(&dc390_driver);
}

module_init(dc390_module_init);
module_exit(dc390_module_exit);

#ifndef MODULE
static int __init dc390_setup (char *str)
{	
	int ints[8],i, im;

	get_options(str, ARRAY_SIZE(ints), ints);
	im = ints[0];

	if (im > 6) {
		printk (KERN_NOTICE "DC390: ignore extra params!\n");
		im = 6;
	}

	for (i = 0; i < im; i++)
		tmscsim[i] = ints[i+1];
	/* dc390_checkparams (); */
	return 1;
}

__setup("tmscsim=", dc390_setup);
#endif