summaryrefslogtreecommitdiffstats
path: root/drivers/char/istallion.c
blob: d6e031542c6bdbd68932b3a46c7fa3ccaf1d2925 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
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
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
/*****************************************************************************/

/*
 *	istallion.c  -- stallion intelligent multiport serial driver.
 *
 *	Copyright (C) 1996-1999  Stallion Technologies
 *	Copyright (C) 1994-1996  Greg Ungerer.
 *
 *	This code is loosely based on the Linux serial driver, written by
 *	Linus Torvalds, Theodore T'so and others.
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 *	This program is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *	GNU General Public License for more details.
 *
 *	You should have received a copy of the GNU General Public License
 *	along with this program; if not, write to the Free Software
 *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*****************************************************************************/

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial.h>
#include <linux/cdk.h>
#include <linux/comstats.h>
#include <linux/istallion.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/wait.h>
#include <linux/eisa.h>

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

#include <linux/pci.h>

/*****************************************************************************/

/*
 *	Define different board types. Not all of the following board types
 *	are supported by this driver. But I will use the standard "assigned"
 *	board numbers. Currently supported boards are abbreviated as:
 *	ECP = EasyConnection 8/64, ONB = ONboard, BBY = Brumby and
 *	STAL = Stallion.
 */
#define	BRD_UNKNOWN	0
#define	BRD_STALLION	1
#define	BRD_BRUMBY4	2
#define	BRD_ONBOARD2	3
#define	BRD_ONBOARD	4
#define	BRD_BRUMBY8	5
#define	BRD_BRUMBY16	6
#define	BRD_ONBOARDE	7
#define	BRD_ONBOARD32	9
#define	BRD_ONBOARD2_32	10
#define	BRD_ONBOARDRS	11
#define	BRD_EASYIO	20
#define	BRD_ECH		21
#define	BRD_ECHMC	22
#define	BRD_ECP		23
#define BRD_ECPE	24
#define	BRD_ECPMC	25
#define	BRD_ECHPCI	26
#define	BRD_ECH64PCI	27
#define	BRD_EASYIOPCI	28
#define	BRD_ECPPCI	29

#define	BRD_BRUMBY	BRD_BRUMBY4

/*
 *	Define a configuration structure to hold the board configuration.
 *	Need to set this up in the code (for now) with the boards that are
 *	to be configured into the system. This is what needs to be modified
 *	when adding/removing/modifying boards. Each line entry in the
 *	stli_brdconf[] array is a board. Each line contains io/irq/memory
 *	ranges for that board (as well as what type of board it is).
 *	Some examples:
 *		{ BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },
 *	This line will configure an EasyConnection 8/64 at io address 2a0,
 *	and shared memory address of cc000. Multiple EasyConnection 8/64
 *	boards can share the same shared memory address space. No interrupt
 *	is required for this board type.
 *	Another example:
 *		{ BRD_ECPE, 0x5000, 0, 0x80000000, 0, 0 },
 *	This line will configure an EasyConnection 8/64 EISA in slot 5 and
 *	shared memory address of 0x80000000 (2 GByte). Multiple
 *	EasyConnection 8/64 EISA boards can share the same shared memory
 *	address space. No interrupt is required for this board type.
 *	Another example:
 *		{ BRD_ONBOARD, 0x240, 0, 0xd0000, 0, 0 },
 *	This line will configure an ONboard (ISA type) at io address 240,
 *	and shared memory address of d0000. Multiple ONboards can share
 *	the same shared memory address space. No interrupt required.
 *	Another example:
 *		{ BRD_BRUMBY4, 0x360, 0, 0xc8000, 0, 0 },
 *	This line will configure a Brumby board (any number of ports!) at
 *	io address 360 and shared memory address of c8000. All Brumby boards
 *	configured into a system must have their own separate io and memory
 *	addresses. No interrupt is required.
 *	Another example:
 *		{ BRD_STALLION, 0x330, 0, 0xd0000, 0, 0 },
 *	This line will configure an original Stallion board at io address 330
 *	and shared memory address d0000 (this would only be valid for a "V4.0"
 *	or Rev.O Stallion board). All Stallion boards configured into the
 *	system must have their own separate io and memory addresses. No
 *	interrupt is required.
 */

typedef struct {
	int		brdtype;
	int		ioaddr1;
	int		ioaddr2;
	unsigned long	memaddr;
	int		irq;
	int		irqtype;
} stlconf_t;

static stlconf_t	stli_brdconf[] = {
	/*{ BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },*/
};

static int	stli_nrbrds = ARRAY_SIZE(stli_brdconf);

/* stli_lock must NOT be taken holding brd_lock */
static spinlock_t stli_lock;	/* TTY logic lock */
static spinlock_t brd_lock;	/* Board logic lock */

/*
 *	There is some experimental EISA board detection code in this driver.
 *	By default it is disabled, but for those that want to try it out,
 *	then set the define below to be 1.
 */
#define	STLI_EISAPROBE	0

/*****************************************************************************/

/*
 *	Define some important driver characteristics. Device major numbers
 *	allocated as per Linux Device Registry.
 */
#ifndef	STL_SIOMEMMAJOR
#define	STL_SIOMEMMAJOR		28
#endif
#ifndef	STL_SERIALMAJOR
#define	STL_SERIALMAJOR		24
#endif
#ifndef	STL_CALLOUTMAJOR
#define	STL_CALLOUTMAJOR	25
#endif

/*****************************************************************************/

/*
 *	Define our local driver identity first. Set up stuff to deal with
 *	all the local structures required by a serial tty driver.
 */
static char	*stli_drvtitle = "Stallion Intelligent Multiport Serial Driver";
static char	*stli_drvname = "istallion";
static char	*stli_drvversion = "5.6.0";
static char	*stli_serialname = "ttyE";

static struct tty_driver	*stli_serial;


#define	STLI_TXBUFSIZE		4096

/*
 *	Use a fast local buffer for cooked characters. Typically a whole
 *	bunch of cooked characters come in for a port, 1 at a time. So we
 *	save those up into a local buffer, then write out the whole lot
 *	with a large memcpy. Just use 1 buffer for all ports, since its
 *	use it is only need for short periods of time by each port.
 */
static char			*stli_txcookbuf;
static int			stli_txcooksize;
static int			stli_txcookrealsize;
static struct tty_struct	*stli_txcooktty;

/*
 *	Define a local default termios struct. All ports will be created
 *	with this termios initially. Basically all it defines is a raw port
 *	at 9600 baud, 8 data bits, no parity, 1 stop bit.
 */
static struct termios		stli_deftermios = {
	.c_cflag	= (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
	.c_cc		= INIT_C_CC,
};

/*
 *	Define global stats structures. Not used often, and can be
 *	re-used for each stats call.
 */
static comstats_t	stli_comstats;
static combrd_t		stli_brdstats;
static asystats_t	stli_cdkstats;
static stlibrd_t	stli_dummybrd;
static stliport_t	stli_dummyport;

/*****************************************************************************/

static stlibrd_t	*stli_brds[STL_MAXBRDS];

static int		stli_shared;

/*
 *	Per board state flags. Used with the state field of the board struct.
 *	Not really much here... All we need to do is keep track of whether
 *	the board has been detected, and whether it is actually running a slave
 *	or not.
 */
#define	BST_FOUND	0x1
#define	BST_STARTED	0x2

/*
 *	Define the set of port state flags. These are marked for internal
 *	state purposes only, usually to do with the state of communications
 *	with the slave. Most of them need to be updated atomically, so always
 *	use the bit setting operations (unless protected by cli/sti).
 */
#define	ST_INITIALIZING	1
#define	ST_OPENING	2
#define	ST_CLOSING	3
#define	ST_CMDING	4
#define	ST_TXBUSY	5
#define	ST_RXING	6
#define	ST_DOFLUSHRX	7
#define	ST_DOFLUSHTX	8
#define	ST_DOSIGS	9
#define	ST_RXSTOP	10
#define	ST_GETSIGS	11

/*
 *	Define an array of board names as printable strings. Handy for
 *	referencing boards when printing trace and stuff.
 */
static char	*stli_brdnames[] = {
	"Unknown",
	"Stallion",
	"Brumby",
	"ONboard-MC",
	"ONboard",
	"Brumby",
	"Brumby",
	"ONboard-EI",
	(char *) NULL,
	"ONboard",
	"ONboard-MC",
	"ONboard-MC",
	(char *) NULL,
	(char *) NULL,
	(char *) NULL,
	(char *) NULL,
	(char *) NULL,
	(char *) NULL,
	(char *) NULL,
	(char *) NULL,
	"EasyIO",
	"EC8/32-AT",
	"EC8/32-MC",
	"EC8/64-AT",
	"EC8/64-EI",
	"EC8/64-MC",
	"EC8/32-PCI",
	"EC8/64-PCI",
	"EasyIO-PCI",
	"EC/RA-PCI",
};

/*****************************************************************************/

/*
 *	Define some string labels for arguments passed from the module
 *	load line. These allow for easy board definitions, and easy
 *	modification of the io, memory and irq resoucres.
 */

static char	*board0[8];
static char	*board1[8];
static char	*board2[8];
static char	*board3[8];

static char	**stli_brdsp[] = {
	(char **) &board0,
	(char **) &board1,
	(char **) &board2,
	(char **) &board3
};

/*
 *	Define a set of common board names, and types. This is used to
 *	parse any module arguments.
 */

typedef struct stlibrdtype {
	char	*name;
	int	type;
} stlibrdtype_t;

static stlibrdtype_t	stli_brdstr[] = {
	{ "stallion", BRD_STALLION },
	{ "1", BRD_STALLION },
	{ "brumby", BRD_BRUMBY },
	{ "brumby4", BRD_BRUMBY },
	{ "brumby/4", BRD_BRUMBY },
	{ "brumby-4", BRD_BRUMBY },
	{ "brumby8", BRD_BRUMBY },
	{ "brumby/8", BRD_BRUMBY },
	{ "brumby-8", BRD_BRUMBY },
	{ "brumby16", BRD_BRUMBY },
	{ "brumby/16", BRD_BRUMBY },
	{ "brumby-16", BRD_BRUMBY },
	{ "2", BRD_BRUMBY },
	{ "onboard2", BRD_ONBOARD2 },
	{ "onboard-2", BRD_ONBOARD2 },
	{ "onboard/2", BRD_ONBOARD2 },
	{ "onboard-mc", BRD_ONBOARD2 },
	{ "onboard/mc", BRD_ONBOARD2 },
	{ "onboard-mca", BRD_ONBOARD2 },
	{ "onboard/mca", BRD_ONBOARD2 },
	{ "3", BRD_ONBOARD2 },
	{ "onboard", BRD_ONBOARD },
	{ "onboardat", BRD_ONBOARD },
	{ "4", BRD_ONBOARD },
	{ "onboarde", BRD_ONBOARDE },
	{ "onboard-e", BRD_ONBOARDE },
	{ "onboard/e", BRD_ONBOARDE },
	{ "onboard-ei", BRD_ONBOARDE },
	{ "onboard/ei", BRD_ONBOARDE },
	{ "7", BRD_ONBOARDE },
	{ "ecp", BRD_ECP },
	{ "ecpat", BRD_ECP },
	{ "ec8/64", BRD_ECP },
	{ "ec8/64-at", BRD_ECP },
	{ "ec8/64-isa", BRD_ECP },
	{ "23", BRD_ECP },
	{ "ecpe", BRD_ECPE },
	{ "ecpei", BRD_ECPE },
	{ "ec8/64-e", BRD_ECPE },
	{ "ec8/64-ei", BRD_ECPE },
	{ "24", BRD_ECPE },
	{ "ecpmc", BRD_ECPMC },
	{ "ec8/64-mc", BRD_ECPMC },
	{ "ec8/64-mca", BRD_ECPMC },
	{ "25", BRD_ECPMC },
	{ "ecppci", BRD_ECPPCI },
	{ "ec/ra", BRD_ECPPCI },
	{ "ec/ra-pc", BRD_ECPPCI },
	{ "ec/ra-pci", BRD_ECPPCI },
	{ "29", BRD_ECPPCI },
};

/*
 *	Define the module agruments.
 */
MODULE_AUTHOR("Greg Ungerer");
MODULE_DESCRIPTION("Stallion Intelligent Multiport Serial Driver");
MODULE_LICENSE("GPL");


module_param_array(board0, charp, NULL, 0);
MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,memaddr]");
module_param_array(board1, charp, NULL, 0);
MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,memaddr]");
module_param_array(board2, charp, NULL, 0);
MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,memaddr]");
module_param_array(board3, charp, NULL, 0);
MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,memaddr]");

/*
 *	Set up a default memory address table for EISA board probing.
 *	The default addresses are all bellow 1Mbyte, which has to be the
 *	case anyway. They should be safe, since we only read values from
 *	them, and interrupts are disabled while we do it. If the higher
 *	memory support is compiled in then we also try probing around
 *	the 1Gb, 2Gb and 3Gb areas as well...
 */
static unsigned long	stli_eisamemprobeaddrs[] = {
	0xc0000,    0xd0000,    0xe0000,    0xf0000,
	0x80000000, 0x80010000, 0x80020000, 0x80030000,
	0x40000000, 0x40010000, 0x40020000, 0x40030000,
	0xc0000000, 0xc0010000, 0xc0020000, 0xc0030000,
	0xff000000, 0xff010000, 0xff020000, 0xff030000,
};

static int	stli_eisamempsize = ARRAY_SIZE(stli_eisamemprobeaddrs);

/*
 *	Define the Stallion PCI vendor and device IDs.
 */
#ifdef CONFIG_PCI
#ifndef	PCI_VENDOR_ID_STALLION
#define	PCI_VENDOR_ID_STALLION		0x124d
#endif
#ifndef PCI_DEVICE_ID_ECRA
#define	PCI_DEVICE_ID_ECRA		0x0004
#endif

static struct pci_device_id istallion_pci_tbl[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECRA), },
	{ 0 }
};
MODULE_DEVICE_TABLE(pci, istallion_pci_tbl);

#endif /* CONFIG_PCI */

/*****************************************************************************/

/*
 *	Hardware configuration info for ECP boards. These defines apply
 *	to the directly accessible io ports of the ECP. There is a set of
 *	defines for each ECP board type, ISA, EISA, MCA and PCI.
 */
#define	ECP_IOSIZE	4

#define	ECP_MEMSIZE	(128 * 1024)
#define	ECP_PCIMEMSIZE	(256 * 1024)

#define	ECP_ATPAGESIZE	(4 * 1024)
#define	ECP_MCPAGESIZE	(4 * 1024)
#define	ECP_EIPAGESIZE	(64 * 1024)
#define	ECP_PCIPAGESIZE	(64 * 1024)

#define	STL_EISAID	0x8c4e

/*
 *	Important defines for the ISA class of ECP board.
 */
#define	ECP_ATIREG	0
#define	ECP_ATCONFR	1
#define	ECP_ATMEMAR	2
#define	ECP_ATMEMPR	3
#define	ECP_ATSTOP	0x1
#define	ECP_ATINTENAB	0x10
#define	ECP_ATENABLE	0x20
#define	ECP_ATDISABLE	0x00
#define	ECP_ATADDRMASK	0x3f000
#define	ECP_ATADDRSHFT	12

/*
 *	Important defines for the EISA class of ECP board.
 */
#define	ECP_EIIREG	0
#define	ECP_EIMEMARL	1
#define	ECP_EICONFR	2
#define	ECP_EIMEMARH	3
#define	ECP_EIENABLE	0x1
#define	ECP_EIDISABLE	0x0
#define	ECP_EISTOP	0x4
#define	ECP_EIEDGE	0x00
#define	ECP_EILEVEL	0x80
#define	ECP_EIADDRMASKL	0x00ff0000
#define	ECP_EIADDRSHFTL	16
#define	ECP_EIADDRMASKH	0xff000000
#define	ECP_EIADDRSHFTH	24
#define	ECP_EIBRDENAB	0xc84

#define	ECP_EISAID	0x4

/*
 *	Important defines for the Micro-channel class of ECP board.
 *	(It has a lot in common with the ISA boards.)
 */
#define	ECP_MCIREG	0
#define	ECP_MCCONFR	1
#define	ECP_MCSTOP	0x20
#define	ECP_MCENABLE	0x80
#define	ECP_MCDISABLE	0x00

/*
 *	Important defines for the PCI class of ECP board.
 *	(It has a lot in common with the other ECP boards.)
 */
#define	ECP_PCIIREG	0
#define	ECP_PCICONFR	1
#define	ECP_PCISTOP	0x01

/*
 *	Hardware configuration info for ONboard and Brumby boards. These
 *	defines apply to the directly accessible io ports of these boards.
 */
#define	ONB_IOSIZE	16
#define	ONB_MEMSIZE	(64 * 1024)
#define	ONB_ATPAGESIZE	(64 * 1024)
#define	ONB_MCPAGESIZE	(64 * 1024)
#define	ONB_EIMEMSIZE	(128 * 1024)
#define	ONB_EIPAGESIZE	(64 * 1024)

/*
 *	Important defines for the ISA class of ONboard board.
 */
#define	ONB_ATIREG	0
#define	ONB_ATMEMAR	1
#define	ONB_ATCONFR	2
#define	ONB_ATSTOP	0x4
#define	ONB_ATENABLE	0x01
#define	ONB_ATDISABLE	0x00
#define	ONB_ATADDRMASK	0xff0000
#define	ONB_ATADDRSHFT	16

#define	ONB_MEMENABLO	0
#define	ONB_MEMENABHI	0x02

/*
 *	Important defines for the EISA class of ONboard board.
 */
#define	ONB_EIIREG	0
#define	ONB_EIMEMARL	1
#define	ONB_EICONFR	2
#define	ONB_EIMEMARH	3
#define	ONB_EIENABLE	0x1
#define	ONB_EIDISABLE	0x0
#define	ONB_EISTOP	0x4
#define	ONB_EIEDGE	0x00
#define	ONB_EILEVEL	0x80
#define	ONB_EIADDRMASKL	0x00ff0000
#define	ONB_EIADDRSHFTL	16
#define	ONB_EIADDRMASKH	0xff000000
#define	ONB_EIADDRSHFTH	24
#define	ONB_EIBRDENAB	0xc84

#define	ONB_EISAID	0x1

/*
 *	Important defines for the Brumby boards. They are pretty simple,
 *	there is not much that is programmably configurable.
 */
#define	BBY_IOSIZE	16
#define	BBY_MEMSIZE	(64 * 1024)
#define	BBY_PAGESIZE	(16 * 1024)

#define	BBY_ATIREG	0
#define	BBY_ATCONFR	1
#define	BBY_ATSTOP	0x4

/*
 *	Important defines for the Stallion boards. They are pretty simple,
 *	there is not much that is programmably configurable.
 */
#define	STAL_IOSIZE	16
#define	STAL_MEMSIZE	(64 * 1024)
#define	STAL_PAGESIZE	(64 * 1024)

/*
 *	Define the set of status register values for EasyConnection panels.
 *	The signature will return with the status value for each panel. From
 *	this we can determine what is attached to the board - before we have
 *	actually down loaded any code to it.
 */
#define	ECH_PNLSTATUS	2
#define	ECH_PNL16PORT	0x20
#define	ECH_PNLIDMASK	0x07
#define	ECH_PNLXPID	0x40
#define	ECH_PNLINTRPEND	0x80

/*
 *	Define some macros to do things to the board. Even those these boards
 *	are somewhat related there is often significantly different ways of
 *	doing some operation on it (like enable, paging, reset, etc). So each
 *	board class has a set of functions which do the commonly required
 *	operations. The macros below basically just call these functions,
 *	generally checking for a NULL function - which means that the board
 *	needs nothing done to it to achieve this operation!
 */
#define	EBRDINIT(brdp)						\
	if (brdp->init != NULL)					\
		(* brdp->init)(brdp)

#define	EBRDENABLE(brdp)					\
	if (brdp->enable != NULL)				\
		(* brdp->enable)(brdp);

#define	EBRDDISABLE(brdp)					\
	if (brdp->disable != NULL)				\
		(* brdp->disable)(brdp);

#define	EBRDINTR(brdp)						\
	if (brdp->intr != NULL)					\
		(* brdp->intr)(brdp);

#define	EBRDRESET(brdp)						\
	if (brdp->reset != NULL)				\
		(* brdp->reset)(brdp);

#define	EBRDGETMEMPTR(brdp,offset)				\
	(* brdp->getmemptr)(brdp, offset, __LINE__)

/*
 *	Define the maximal baud rate, and the default baud base for ports.
 */
#define	STL_MAXBAUD	460800
#define	STL_BAUDBASE	115200
#define	STL_CLOSEDELAY	(5 * HZ / 10)

/*****************************************************************************/

/*
 *	Define macros to extract a brd or port number from a minor number.
 */
#define	MINOR2BRD(min)		(((min) & 0xc0) >> 6)
#define	MINOR2PORT(min)		((min) & 0x3f)

/*****************************************************************************/

/*
 *	Define some handy local macros...
 */
#undef MIN
#define	MIN(a,b)	(((a) <= (b)) ? (a) : (b))

#undef	TOLOWER
#define	TOLOWER(x)	((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x))

/*****************************************************************************/

/*
 *	Prototype all functions in this driver!
 */

static int	stli_parsebrd(stlconf_t *confp, char **argp);
static int	stli_init(void);
static int	stli_open(struct tty_struct *tty, struct file *filp);
static void	stli_close(struct tty_struct *tty, struct file *filp);
static int	stli_write(struct tty_struct *tty, const unsigned char *buf, int count);
static void	stli_putchar(struct tty_struct *tty, unsigned char ch);
static void	stli_flushchars(struct tty_struct *tty);
static int	stli_writeroom(struct tty_struct *tty);
static int	stli_charsinbuffer(struct tty_struct *tty);
static int	stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
static void	stli_settermios(struct tty_struct *tty, struct termios *old);
static void	stli_throttle(struct tty_struct *tty);
static void	stli_unthrottle(struct tty_struct *tty);
static void	stli_stop(struct tty_struct *tty);
static void	stli_start(struct tty_struct *tty);
static void	stli_flushbuffer(struct tty_struct *tty);
static void	stli_breakctl(struct tty_struct *tty, int state);
static void	stli_waituntilsent(struct tty_struct *tty, int timeout);
static void	stli_sendxchar(struct tty_struct *tty, char ch);
static void	stli_hangup(struct tty_struct *tty);
static int	stli_portinfo(stlibrd_t *brdp, stliport_t *portp, int portnr, char *pos);

static int	stli_brdinit(stlibrd_t *brdp);
static int	stli_startbrd(stlibrd_t *brdp);
static ssize_t	stli_memread(struct file *fp, char __user *buf, size_t count, loff_t *offp);
static ssize_t	stli_memwrite(struct file *fp, const char __user *buf, size_t count, loff_t *offp);
static int	stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
static void	stli_brdpoll(stlibrd_t *brdp, cdkhdr_t __iomem *hdrp);
static void	stli_poll(unsigned long arg);
static int	stli_hostcmd(stlibrd_t *brdp, stliport_t *portp);
static int	stli_initopen(stlibrd_t *brdp, stliport_t *portp);
static int	stli_rawopen(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait);
static int	stli_rawclose(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait);
static int	stli_waitcarrier(stlibrd_t *brdp, stliport_t *portp, struct file *filp);
static void	stli_dohangup(void *arg);
static int	stli_setport(stliport_t *portp);
static int	stli_cmdwait(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
static void	stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
static void	__stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
static void	stli_dodelaycmd(stliport_t *portp, cdkctrl_t __iomem *cp);
static void	stli_mkasyport(stliport_t *portp, asyport_t *pp, struct termios *tiosp);
static void	stli_mkasysigs(asysigs_t *sp, int dtr, int rts);
static long	stli_mktiocm(unsigned long sigvalue);
static void	stli_read(stlibrd_t *brdp, stliport_t *portp);
static int	stli_getserial(stliport_t *portp, struct serial_struct __user *sp);
static int	stli_setserial(stliport_t *portp, struct serial_struct __user *sp);
static int	stli_getbrdstats(combrd_t __user *bp);
static int	stli_getportstats(stliport_t *portp, comstats_t __user *cp);
static int	stli_portcmdstats(stliport_t *portp);
static int	stli_clrportstats(stliport_t *portp, comstats_t __user *cp);
static int	stli_getportstruct(stliport_t __user *arg);
static int	stli_getbrdstruct(stlibrd_t __user *arg);
static stlibrd_t *stli_allocbrd(void);

static void	stli_ecpinit(stlibrd_t *brdp);
static void	stli_ecpenable(stlibrd_t *brdp);
static void	stli_ecpdisable(stlibrd_t *brdp);
static char	*stli_ecpgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void	stli_ecpreset(stlibrd_t *brdp);
static void	stli_ecpintr(stlibrd_t *brdp);
static void	stli_ecpeiinit(stlibrd_t *brdp);
static void	stli_ecpeienable(stlibrd_t *brdp);
static void	stli_ecpeidisable(stlibrd_t *brdp);
static char	*stli_ecpeigetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void	stli_ecpeireset(stlibrd_t *brdp);
static void	stli_ecpmcenable(stlibrd_t *brdp);
static void	stli_ecpmcdisable(stlibrd_t *brdp);
static char	*stli_ecpmcgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void	stli_ecpmcreset(stlibrd_t *brdp);
static void	stli_ecppciinit(stlibrd_t *brdp);
static char	*stli_ecppcigetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void	stli_ecppcireset(stlibrd_t *brdp);

static void	stli_onbinit(stlibrd_t *brdp);
static void	stli_onbenable(stlibrd_t *brdp);
static void	stli_onbdisable(stlibrd_t *brdp);
static char	*stli_onbgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void	stli_onbreset(stlibrd_t *brdp);
static void	stli_onbeinit(stlibrd_t *brdp);
static void	stli_onbeenable(stlibrd_t *brdp);
static void	stli_onbedisable(stlibrd_t *brdp);
static char	*stli_onbegetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void	stli_onbereset(stlibrd_t *brdp);
static void	stli_bbyinit(stlibrd_t *brdp);
static char	*stli_bbygetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void	stli_bbyreset(stlibrd_t *brdp);
static void	stli_stalinit(stlibrd_t *brdp);
static char	*stli_stalgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void	stli_stalreset(stlibrd_t *brdp);

static stliport_t *stli_getport(int brdnr, int panelnr, int portnr);

static int	stli_initecp(stlibrd_t *brdp);
static int	stli_initonb(stlibrd_t *brdp);
static int	stli_eisamemprobe(stlibrd_t *brdp);
static int	stli_initports(stlibrd_t *brdp);

#ifdef	CONFIG_PCI
static int	stli_initpcibrd(int brdtype, struct pci_dev *devp);
#endif

/*****************************************************************************/

/*
 *	Define the driver info for a user level shared memory device. This
 *	device will work sort of like the /dev/kmem device - except that it
 *	will give access to the shared memory on the Stallion intelligent
 *	board. This is also a very useful debugging tool.
 */
static const struct file_operations	stli_fsiomem = {
	.owner		= THIS_MODULE,
	.read		= stli_memread,
	.write		= stli_memwrite,
	.ioctl		= stli_memioctl,
};

/*****************************************************************************/

/*
 *	Define a timer_list entry for our poll routine. The slave board
 *	is polled every so often to see if anything needs doing. This is
 *	much cheaper on host cpu than using interrupts. It turns out to
 *	not increase character latency by much either...
 */
static DEFINE_TIMER(stli_timerlist, stli_poll, 0, 0);

static int	stli_timeron;

/*
 *	Define the calculation for the timeout routine.
 */
#define	STLI_TIMEOUT	(jiffies + 1)

/*****************************************************************************/

static struct class *istallion_class;

/*
 *	Loadable module initialization stuff.
 */

static int __init istallion_module_init(void)
{
	stli_init();
	return 0;
}

/*****************************************************************************/

static void __exit istallion_module_exit(void)
{
	stlibrd_t	*brdp;
	stliport_t	*portp;
	int		i, j;

	printk(KERN_INFO "Unloading %s: version %s\n", stli_drvtitle,
		stli_drvversion);

	/*
	 *	Free up all allocated resources used by the ports. This includes
	 *	memory and interrupts.
	 */
	if (stli_timeron) {
		stli_timeron = 0;
		del_timer_sync(&stli_timerlist);
	}

	i = tty_unregister_driver(stli_serial);
	if (i) {
		printk("STALLION: failed to un-register tty driver, "
			"errno=%d\n", -i);
		return;
	}
	put_tty_driver(stli_serial);
	for (i = 0; i < 4; i++)
		class_device_destroy(istallion_class, MKDEV(STL_SIOMEMMAJOR, i));
	class_destroy(istallion_class);
	if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
		printk("STALLION: failed to un-register serial memory device, "
			"errno=%d\n", -i);

	kfree(stli_txcookbuf);

	for (i = 0; (i < stli_nrbrds); i++) {
		if ((brdp = stli_brds[i]) == NULL)
			continue;
		for (j = 0; (j < STL_MAXPORTS); j++) {
			portp = brdp->ports[j];
			if (portp != NULL) {
				if (portp->tty != NULL)
					tty_hangup(portp->tty);
				kfree(portp);
			}
		}

		iounmap(brdp->membase);
		if (brdp->iosize > 0)
			release_region(brdp->iobase, brdp->iosize);
		kfree(brdp);
		stli_brds[i] = NULL;
	}
}

module_init(istallion_module_init);
module_exit(istallion_module_exit);

/*****************************************************************************/

/*
 *	Check for any arguments passed in on the module load command line.
 */

static void stli_argbrds(void)
{
	stlconf_t conf;
	stlibrd_t *brdp;
	int i;

	for (i = stli_nrbrds; i < ARRAY_SIZE(stli_brdsp); i++) {
		memset(&conf, 0, sizeof(conf));
		if (stli_parsebrd(&conf, stli_brdsp[i]) == 0)
			continue;
		if ((brdp = stli_allocbrd()) == NULL)
			continue;
		stli_nrbrds = i + 1;
		brdp->brdnr = i;
		brdp->brdtype = conf.brdtype;
		brdp->iobase = conf.ioaddr1;
		brdp->memaddr = conf.memaddr;
		stli_brdinit(brdp);
	}
}

/*****************************************************************************/

/*
 *	Convert an ascii string number into an unsigned long.
 */

static unsigned long stli_atol(char *str)
{
	unsigned long val;
	int base, c;
	char *sp;

	val = 0;
	sp = str;
	if ((*sp == '0') && (*(sp+1) == 'x')) {
		base = 16;
		sp += 2;
	} else if (*sp == '0') {
		base = 8;
		sp++;
	} else {
		base = 10;
	}

	for (; (*sp != 0); sp++) {
		c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0');
		if ((c < 0) || (c >= base)) {
			printk("STALLION: invalid argument %s\n", str);
			val = 0;
			break;
		}
		val = (val * base) + c;
	}
	return(val);
}

/*****************************************************************************/

/*
 *	Parse the supplied argument string, into the board conf struct.
 */

static int stli_parsebrd(stlconf_t *confp, char **argp)
{
	char *sp;
	int i;

	if (argp[0] == NULL || *argp[0] == 0)
		return 0;

	for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
		*sp = TOLOWER(*sp);

	for (i = 0; i < ARRAY_SIZE(stli_brdstr); i++) {
		if (strcmp(stli_brdstr[i].name, argp[0]) == 0)
			break;
	}
	if (i == ARRAY_SIZE(stli_brdstr)) {
		printk("STALLION: unknown board name, %s?\n", argp[0]);
		return 0;
	}

	confp->brdtype = stli_brdstr[i].type;
	if (argp[1] != NULL && *argp[1] != 0)
		confp->ioaddr1 = stli_atol(argp[1]);
	if (argp[2] !=  NULL && *argp[2] != 0)
		confp->memaddr = stli_atol(argp[2]);
	return(1);
}

/*****************************************************************************/

static int stli_open(struct tty_struct *tty, struct file *filp)
{
	stlibrd_t *brdp;
	stliport_t *portp;
	unsigned int minordev;
	int brdnr, portnr, rc;

	minordev = tty->index;
	brdnr = MINOR2BRD(minordev);
	if (brdnr >= stli_nrbrds)
		return -ENODEV;
	brdp = stli_brds[brdnr];
	if (brdp == NULL)
		return -ENODEV;
	if ((brdp->state & BST_STARTED) == 0)
		return -ENODEV;
	portnr = MINOR2PORT(minordev);
	if ((portnr < 0) || (portnr > brdp->nrports))
		return -ENODEV;

	portp = brdp->ports[portnr];
	if (portp == NULL)
		return -ENODEV;
	if (portp->devnr < 1)
		return -ENODEV;


/*
 *	Check if this port is in the middle of closing. If so then wait
 *	until it is closed then return error status based on flag settings.
 *	The sleep here does not need interrupt protection since the wakeup
 *	for it is done with the same context.
 */
	if (portp->flags & ASYNC_CLOSING) {
		interruptible_sleep_on(&portp->close_wait);
		if (portp->flags & ASYNC_HUP_NOTIFY)
			return -EAGAIN;
		return -ERESTARTSYS;
	}

/*
 *	On the first open of the device setup the port hardware, and
 *	initialize the per port data structure. Since initializing the port
 *	requires several commands to the board we will need to wait for any
 *	other open that is already initializing the port.
 */
	portp->tty = tty;
	tty->driver_data = portp;
	portp->refcount++;

	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_INITIALIZING, &portp->state));
	if (signal_pending(current))
		return -ERESTARTSYS;

	if ((portp->flags & ASYNC_INITIALIZED) == 0) {
		set_bit(ST_INITIALIZING, &portp->state);
		if ((rc = stli_initopen(brdp, portp)) >= 0) {
			portp->flags |= ASYNC_INITIALIZED;
			clear_bit(TTY_IO_ERROR, &tty->flags);
		}
		clear_bit(ST_INITIALIZING, &portp->state);
		wake_up_interruptible(&portp->raw_wait);
		if (rc < 0)
			return rc;
	}

/*
 *	Check if this port is in the middle of closing. If so then wait
 *	until it is closed then return error status, based on flag settings.
 *	The sleep here does not need interrupt protection since the wakeup
 *	for it is done with the same context.
 */
	if (portp->flags & ASYNC_CLOSING) {
		interruptible_sleep_on(&portp->close_wait);
		if (portp->flags & ASYNC_HUP_NOTIFY)
			return -EAGAIN;
		return -ERESTARTSYS;
	}

/*
 *	Based on type of open being done check if it can overlap with any
 *	previous opens still in effect. If we are a normal serial device
 *	then also we might have to wait for carrier.
 */
	if (!(filp->f_flags & O_NONBLOCK)) {
		if ((rc = stli_waitcarrier(brdp, portp, filp)) != 0)
			return rc;
	}
	portp->flags |= ASYNC_NORMAL_ACTIVE;
	return 0;
}

/*****************************************************************************/

static void stli_close(struct tty_struct *tty, struct file *filp)
{
	stlibrd_t *brdp;
	stliport_t *portp;
	unsigned long flags;

	portp = tty->driver_data;
	if (portp == NULL)
		return;

	spin_lock_irqsave(&stli_lock, flags);
	if (tty_hung_up_p(filp)) {
		spin_unlock_irqrestore(&stli_lock, flags);
		return;
	}
	if ((tty->count == 1) && (portp->refcount != 1))
		portp->refcount = 1;
	if (portp->refcount-- > 1) {
		spin_unlock_irqrestore(&stli_lock, flags);
		return;
	}

	portp->flags |= ASYNC_CLOSING;

/*
 *	May want to wait for data to drain before closing. The BUSY flag
 *	keeps track of whether we are still transmitting or not. It is
 *	updated by messages from the slave - indicating when all chars
 *	really have drained.
 */
	if (tty == stli_txcooktty)
		stli_flushchars(tty);
	tty->closing = 1;
	spin_unlock_irqrestore(&stli_lock, flags);

	if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
		tty_wait_until_sent(tty, portp->closing_wait);

	portp->flags &= ~ASYNC_INITIALIZED;
	brdp = stli_brds[portp->brdnr];
	stli_rawclose(brdp, portp, 0, 0);
	if (tty->termios->c_cflag & HUPCL) {
		stli_mkasysigs(&portp->asig, 0, 0);
		if (test_bit(ST_CMDING, &portp->state))
			set_bit(ST_DOSIGS, &portp->state);
		else
			stli_sendcmd(brdp, portp, A_SETSIGNALS, &portp->asig,
				sizeof(asysigs_t), 0);
	}
	clear_bit(ST_TXBUSY, &portp->state);
	clear_bit(ST_RXSTOP, &portp->state);
	set_bit(TTY_IO_ERROR, &tty->flags);
	if (tty->ldisc.flush_buffer)
		(tty->ldisc.flush_buffer)(tty);
	set_bit(ST_DOFLUSHRX, &portp->state);
	stli_flushbuffer(tty);

	tty->closing = 0;
	portp->tty = NULL;

	if (portp->openwaitcnt) {
		if (portp->close_delay)
			msleep_interruptible(jiffies_to_msecs(portp->close_delay));
		wake_up_interruptible(&portp->open_wait);
	}

	portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
	wake_up_interruptible(&portp->close_wait);
}

/*****************************************************************************/

/*
 *	Carry out first open operations on a port. This involves a number of
 *	commands to be sent to the slave. We need to open the port, set the
 *	notification events, set the initial port settings, get and set the
 *	initial signal values. We sleep and wait in between each one. But
 *	this still all happens pretty quickly.
 */

static int stli_initopen(stlibrd_t *brdp, stliport_t *portp)
{
	struct tty_struct *tty;
	asynotify_t nt;
	asyport_t aport;
	int rc;

	if ((rc = stli_rawopen(brdp, portp, 0, 1)) < 0)
		return rc;

	memset(&nt, 0, sizeof(asynotify_t));
	nt.data = (DT_TXLOW | DT_TXEMPTY | DT_RXBUSY | DT_RXBREAK);
	nt.signal = SG_DCD;
	if ((rc = stli_cmdwait(brdp, portp, A_SETNOTIFY, &nt,
	    sizeof(asynotify_t), 0)) < 0)
		return rc;

	tty = portp->tty;
	if (tty == NULL)
		return -ENODEV;
	stli_mkasyport(portp, &aport, tty->termios);
	if ((rc = stli_cmdwait(brdp, portp, A_SETPORT, &aport,
	    sizeof(asyport_t), 0)) < 0)
		return rc;

	set_bit(ST_GETSIGS, &portp->state);
	if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS, &portp->asig,
	    sizeof(asysigs_t), 1)) < 0)
		return rc;
	if (test_and_clear_bit(ST_GETSIGS, &portp->state))
		portp->sigs = stli_mktiocm(portp->asig.sigvalue);
	stli_mkasysigs(&portp->asig, 1, 1);
	if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
	    sizeof(asysigs_t), 0)) < 0)
		return rc;

	return 0;
}

/*****************************************************************************/

/*
 *	Send an open message to the slave. This will sleep waiting for the
 *	acknowledgement, so must have user context. We need to co-ordinate
 *	with close events here, since we don't want open and close events
 *	to overlap.
 */

static int stli_rawopen(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait)
{
	cdkhdr_t __iomem *hdrp;
	cdkctrl_t __iomem *cp;
	unsigned char __iomem *bits;
	unsigned long flags;
	int rc;

/*
 *	Send a message to the slave to open this port.
 */

/*
 *	Slave is already closing this port. This can happen if a hangup
 *	occurs on this port. So we must wait until it is complete. The
 *	order of opens and closes may not be preserved across shared
 *	memory, so we must wait until it is complete.
 */
	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_CLOSING, &portp->state));
	if (signal_pending(current)) {
		return -ERESTARTSYS;
	}

/*
 *	Everything is ready now, so write the open message into shared
 *	memory. Once the message is in set the service bits to say that
 *	this port wants service.
 */
	spin_lock_irqsave(&brd_lock, flags);
	EBRDENABLE(brdp);
	cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
	writel(arg, &cp->openarg);
	writeb(1, &cp->open);
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
		portp->portidx;
	writeb(readb(bits) | portp->portbit, bits);
	EBRDDISABLE(brdp);

	if (wait == 0) {
		spin_unlock_irqrestore(&brd_lock, flags);
		return 0;
	}

/*
 *	Slave is in action, so now we must wait for the open acknowledgment
 *	to come back.
 */
	rc = 0;
	set_bit(ST_OPENING, &portp->state);
	spin_unlock_irqrestore(&brd_lock, flags);

	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_OPENING, &portp->state));
	if (signal_pending(current))
		rc = -ERESTARTSYS;

	if ((rc == 0) && (portp->rc != 0))
		rc = -EIO;
	return rc;
}

/*****************************************************************************/

/*
 *	Send a close message to the slave. Normally this will sleep waiting
 *	for the acknowledgement, but if wait parameter is 0 it will not. If
 *	wait is true then must have user context (to sleep).
 */

static int stli_rawclose(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait)
{
	cdkhdr_t __iomem *hdrp;
	cdkctrl_t __iomem *cp;
	unsigned char __iomem *bits;
	unsigned long flags;
	int rc;

/*
 *	Slave is already closing this port. This can happen if a hangup
 *	occurs on this port.
 */
	if (wait) {
		wait_event_interruptible(portp->raw_wait,
				!test_bit(ST_CLOSING, &portp->state));
		if (signal_pending(current)) {
			return -ERESTARTSYS;
		}
	}

/*
 *	Write the close command into shared memory.
 */
	spin_lock_irqsave(&brd_lock, flags);
	EBRDENABLE(brdp);
	cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
	writel(arg, &cp->closearg);
	writeb(1, &cp->close);
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
		portp->portidx;
	writeb(readb(bits) |portp->portbit, bits);
	EBRDDISABLE(brdp);

	set_bit(ST_CLOSING, &portp->state);
	spin_unlock_irqrestore(&brd_lock, flags);

	if (wait == 0)
		return 0;

/*
 *	Slave is in action, so now we must wait for the open acknowledgment
 *	to come back.
 */
	rc = 0;
	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_CLOSING, &portp->state));
	if (signal_pending(current))
		rc = -ERESTARTSYS;

	if ((rc == 0) && (portp->rc != 0))
		rc = -EIO;
	return rc;
}

/*****************************************************************************/

/*
 *	Send a command to the slave and wait for the response. This must
 *	have user context (it sleeps). This routine is generic in that it
 *	can send any type of command. Its purpose is to wait for that command
 *	to complete (as opposed to initiating the command then returning).
 */

static int stli_cmdwait(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
{
	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_CMDING, &portp->state));
	if (signal_pending(current))
		return -ERESTARTSYS;

	stli_sendcmd(brdp, portp, cmd, arg, size, copyback);

	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_CMDING, &portp->state));
	if (signal_pending(current))
		return -ERESTARTSYS;

	if (portp->rc != 0)
		return -EIO;
	return 0;
}

/*****************************************************************************/

/*
 *	Send the termios settings for this port to the slave. This sleeps
 *	waiting for the command to complete - so must have user context.
 */

static int stli_setport(stliport_t *portp)
{
	stlibrd_t *brdp;
	asyport_t aport;

	if (portp == NULL)
		return -ENODEV;
	if (portp->tty == NULL)
		return -ENODEV;
	if (portp->brdnr < 0 && portp->brdnr >= stli_nrbrds)
		return -ENODEV;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return -ENODEV;

	stli_mkasyport(portp, &aport, portp->tty->termios);
	return(stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0));
}

/*****************************************************************************/

/*
 *	Possibly need to wait for carrier (DCD signal) to come high. Say
 *	maybe because if we are clocal then we don't need to wait...
 */

static int stli_waitcarrier(stlibrd_t *brdp, stliport_t *portp, struct file *filp)
{
	unsigned long flags;
	int rc, doclocal;

	rc = 0;
	doclocal = 0;

	if (portp->tty->termios->c_cflag & CLOCAL)
		doclocal++;

	spin_lock_irqsave(&stli_lock, flags);
	portp->openwaitcnt++;
	if (! tty_hung_up_p(filp))
		portp->refcount--;
	spin_unlock_irqrestore(&stli_lock, flags);

	for (;;) {
		stli_mkasysigs(&portp->asig, 1, 1);
		if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS,
		    &portp->asig, sizeof(asysigs_t), 0)) < 0)
			break;
		if (tty_hung_up_p(filp) ||
		    ((portp->flags & ASYNC_INITIALIZED) == 0)) {
			if (portp->flags & ASYNC_HUP_NOTIFY)
				rc = -EBUSY;
			else
				rc = -ERESTARTSYS;
			break;
		}
		if (((portp->flags & ASYNC_CLOSING) == 0) &&
		    (doclocal || (portp->sigs & TIOCM_CD))) {
			break;
		}
		if (signal_pending(current)) {
			rc = -ERESTARTSYS;
			break;
		}
		interruptible_sleep_on(&portp->open_wait);
	}

	spin_lock_irqsave(&stli_lock, flags);
	if (! tty_hung_up_p(filp))
		portp->refcount++;
	portp->openwaitcnt--;
	spin_unlock_irqrestore(&stli_lock, flags);

	return rc;
}

/*****************************************************************************/

/*
 *	Write routine. Take the data and put it in the shared memory ring
 *	queue. If port is not already sending chars then need to mark the
 *	service bits for this port.
 */

static int stli_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
	cdkasy_t __iomem *ap;
	cdkhdr_t __iomem *hdrp;
	unsigned char __iomem *bits;
	unsigned char __iomem *shbuf;
	unsigned char *chbuf;
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned int len, stlen, head, tail, size;
	unsigned long flags;

	if (tty == stli_txcooktty)
		stli_flushchars(tty);
	portp = tty->driver_data;
	if (portp == NULL)
		return 0;
	if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
		return 0;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return 0;
	chbuf = (unsigned char *) buf;

/*
 *	All data is now local, shove as much as possible into shared memory.
 */
	spin_lock_irqsave(&brd_lock, flags);
	EBRDENABLE(brdp);
	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	head = (unsigned int) readw(&ap->txq.head);
	tail = (unsigned int) readw(&ap->txq.tail);
	if (tail != ((unsigned int) readw(&ap->txq.tail)))
		tail = (unsigned int) readw(&ap->txq.tail);
	size = portp->txsize;
	if (head >= tail) {
		len = size - (head - tail) - 1;
		stlen = size - head;
	} else {
		len = tail - head - 1;
		stlen = len;
	}

	len = MIN(len, count);
	count = 0;
	shbuf = (char __iomem *) EBRDGETMEMPTR(brdp, portp->txoffset);

	while (len > 0) {
		stlen = MIN(len, stlen);
		memcpy_toio(shbuf + head, chbuf, stlen);
		chbuf += stlen;
		len -= stlen;
		count += stlen;
		head += stlen;
		if (head >= size) {
			head = 0;
			stlen = tail;
		}
	}

	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	writew(head, &ap->txq.head);
	if (test_bit(ST_TXBUSY, &portp->state)) {
		if (readl(&ap->changed.data) & DT_TXEMPTY)
			writel(readl(&ap->changed.data) & ~DT_TXEMPTY, &ap->changed.data);
	}
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
		portp->portidx;
	writeb(readb(bits) | portp->portbit, bits);
	set_bit(ST_TXBUSY, &portp->state);
	EBRDDISABLE(brdp);
	spin_unlock_irqrestore(&brd_lock, flags);

	return(count);
}

/*****************************************************************************/

/*
 *	Output a single character. We put it into a temporary local buffer
 *	(for speed) then write out that buffer when the flushchars routine
 *	is called. There is a safety catch here so that if some other port
 *	writes chars before the current buffer has been, then we write them
 *	first them do the new ports.
 */

static void stli_putchar(struct tty_struct *tty, unsigned char ch)
{
	if (tty != stli_txcooktty) {
		if (stli_txcooktty != NULL)
			stli_flushchars(stli_txcooktty);
		stli_txcooktty = tty;
	}

	stli_txcookbuf[stli_txcooksize++] = ch;
}

/*****************************************************************************/

/*
 *	Transfer characters from the local TX cooking buffer to the board.
 *	We sort of ignore the tty that gets passed in here. We rely on the
 *	info stored with the TX cook buffer to tell us which port to flush
 *	the data on. In any case we clean out the TX cook buffer, for re-use
 *	by someone else.
 */

static void stli_flushchars(struct tty_struct *tty)
{
	cdkhdr_t __iomem *hdrp;
	unsigned char __iomem *bits;
	cdkasy_t __iomem *ap;
	struct tty_struct *cooktty;
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned int len, stlen, head, tail, size, count, cooksize;
	unsigned char *buf;
	unsigned char __iomem *shbuf;
	unsigned long flags;

	cooksize = stli_txcooksize;
	cooktty = stli_txcooktty;
	stli_txcooksize = 0;
	stli_txcookrealsize = 0;
	stli_txcooktty = NULL;

	if (tty == NULL)
		return;
	if (cooktty == NULL)
		return;
	if (tty != cooktty)
		tty = cooktty;
	if (cooksize == 0)
		return;

	portp = tty->driver_data;
	if (portp == NULL)
		return;
	if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
		return;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return;

	spin_lock_irqsave(&brd_lock, flags);
	EBRDENABLE(brdp);

	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	head = (unsigned int) readw(&ap->txq.head);
	tail = (unsigned int) readw(&ap->txq.tail);
	if (tail != ((unsigned int) readw(&ap->txq.tail)))
		tail = (unsigned int) readw(&ap->txq.tail);
	size = portp->txsize;
	if (head >= tail) {
		len = size - (head - tail) - 1;
		stlen = size - head;
	} else {
		len = tail - head - 1;
		stlen = len;
	}

	len = MIN(len, cooksize);
	count = 0;
	shbuf = (char *) EBRDGETMEMPTR(brdp, portp->txoffset);
	buf = stli_txcookbuf;

	while (len > 0) {
		stlen = MIN(len, stlen);
		memcpy_toio(shbuf + head, buf, stlen);
		buf += stlen;
		len -= stlen;
		count += stlen;
		head += stlen;
		if (head >= size) {
			head = 0;
			stlen = tail;
		}
	}

	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	writew(head, &ap->txq.head);

	if (test_bit(ST_TXBUSY, &portp->state)) {
		if (readl(&ap->changed.data) & DT_TXEMPTY)
			writel(readl(&ap->changed.data) & ~DT_TXEMPTY, &ap->changed.data);
	}
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
		portp->portidx;
	writeb(readb(bits) | portp->portbit, bits);
	set_bit(ST_TXBUSY, &portp->state);

	EBRDDISABLE(brdp);
	spin_unlock_irqrestore(&brd_lock, flags);
}

/*****************************************************************************/

static int stli_writeroom(struct tty_struct *tty)
{
	cdkasyrq_t __iomem *rp;
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned int head, tail, len;
	unsigned long flags;

	if (tty == stli_txcooktty) {
		if (stli_txcookrealsize != 0) {
			len = stli_txcookrealsize - stli_txcooksize;
			return len;
		}
	}

	portp = tty->driver_data;
	if (portp == NULL)
		return 0;
	if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
		return 0;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return 0;

	spin_lock_irqsave(&brd_lock, flags);
	EBRDENABLE(brdp);
	rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
	head = (unsigned int) readw(&rp->head);
	tail = (unsigned int) readw(&rp->tail);
	if (tail != ((unsigned int) readw(&rp->tail)))
		tail = (unsigned int) readw(&rp->tail);
	len = (head >= tail) ? (portp->txsize - (head - tail)) : (tail - head);
	len--;
	EBRDDISABLE(brdp);
	spin_unlock_irqrestore(&brd_lock, flags);

	if (tty == stli_txcooktty) {
		stli_txcookrealsize = len;
		len -= stli_txcooksize;
	}
	return len;
}

/*****************************************************************************/

/*
 *	Return the number of characters in the transmit buffer. Normally we
 *	will return the number of chars in the shared memory ring queue.
 *	We need to kludge around the case where the shared memory buffer is
 *	empty but not all characters have drained yet, for this case just
 *	return that there is 1 character in the buffer!
 */

static int stli_charsinbuffer(struct tty_struct *tty)
{
	cdkasyrq_t __iomem *rp;
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned int head, tail, len;
	unsigned long flags;

	if (tty == stli_txcooktty)
		stli_flushchars(tty);
	portp = tty->driver_data;
	if (portp == NULL)
		return 0;
	if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
		return 0;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return 0;

	spin_lock_irqsave(&brd_lock, flags);
	EBRDENABLE(brdp);
	rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
	head = (unsigned int) readw(&rp->head);
	tail = (unsigned int) readw(&rp->tail);
	if (tail != ((unsigned int) readw(&rp->tail)))
		tail = (unsigned int) readw(&rp->tail);
	len = (head >= tail) ? (head - tail) : (portp->txsize - (tail - head));
	if ((len == 0) && test_bit(ST_TXBUSY, &portp->state))
		len = 1;
	EBRDDISABLE(brdp);
	spin_unlock_irqrestore(&brd_lock, flags);

	return len;
}

/*****************************************************************************/

/*
 *	Generate the serial struct info.
 */

static int stli_getserial(stliport_t *portp, struct serial_struct __user *sp)
{
	struct serial_struct sio;
	stlibrd_t *brdp;

	memset(&sio, 0, sizeof(struct serial_struct));
	sio.type = PORT_UNKNOWN;
	sio.line = portp->portnr;
	sio.irq = 0;
	sio.flags = portp->flags;
	sio.baud_base = portp->baud_base;
	sio.close_delay = portp->close_delay;
	sio.closing_wait = portp->closing_wait;
	sio.custom_divisor = portp->custom_divisor;
	sio.xmit_fifo_size = 0;
	sio.hub6 = 0;

	brdp = stli_brds[portp->brdnr];
	if (brdp != NULL)
		sio.port = brdp->iobase;
		
	return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ?
			-EFAULT : 0;
}

/*****************************************************************************/

/*
 *	Set port according to the serial struct info.
 *	At this point we do not do any auto-configure stuff, so we will
 *	just quietly ignore any requests to change irq, etc.
 */

static int stli_setserial(stliport_t *portp, struct serial_struct __user *sp)
{
	struct serial_struct sio;
	int rc;

	if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
		return -EFAULT;
	if (!capable(CAP_SYS_ADMIN)) {
		if ((sio.baud_base != portp->baud_base) ||
		    (sio.close_delay != portp->close_delay) ||
		    ((sio.flags & ~ASYNC_USR_MASK) !=
		    (portp->flags & ~ASYNC_USR_MASK)))
			return -EPERM;
	} 

	portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
		(sio.flags & ASYNC_USR_MASK);
	portp->baud_base = sio.baud_base;
	portp->close_delay = sio.close_delay;
	portp->closing_wait = sio.closing_wait;
	portp->custom_divisor = sio.custom_divisor;

	if ((rc = stli_setport(portp)) < 0)
		return rc;
	return 0;
}

/*****************************************************************************/

static int stli_tiocmget(struct tty_struct *tty, struct file *file)
{
	stliport_t *portp = tty->driver_data;
	stlibrd_t *brdp;
	int rc;

	if (portp == NULL)
		return -ENODEV;
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
		return 0;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return 0;
	if (tty->flags & (1 << TTY_IO_ERROR))
		return -EIO;

	if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS,
			       &portp->asig, sizeof(asysigs_t), 1)) < 0)
		return rc;

	return stli_mktiocm(portp->asig.sigvalue);
}

static int stli_tiocmset(struct tty_struct *tty, struct file *file,
			 unsigned int set, unsigned int clear)
{
	stliport_t *portp = tty->driver_data;
	stlibrd_t *brdp;
	int rts = -1, dtr = -1;

	if (portp == NULL)
		return -ENODEV;
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
		return 0;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return 0;
	if (tty->flags & (1 << TTY_IO_ERROR))
		return -EIO;

	if (set & TIOCM_RTS)
		rts = 1;
	if (set & TIOCM_DTR)
		dtr = 1;
	if (clear & TIOCM_RTS)
		rts = 0;
	if (clear & TIOCM_DTR)
		dtr = 0;

	stli_mkasysigs(&portp->asig, dtr, rts);

	return stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
			    sizeof(asysigs_t), 0);
}

static int stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
{
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned int ival;
	int rc;
	void __user *argp = (void __user *)arg;

	portp = tty->driver_data;
	if (portp == NULL)
		return -ENODEV;
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
		return 0;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return 0;

	if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
 	    (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
		if (tty->flags & (1 << TTY_IO_ERROR))
			return -EIO;
	}

	rc = 0;

	switch (cmd) {
	case TIOCGSOFTCAR:
		rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
			(unsigned __user *) arg);
		break;
	case TIOCSSOFTCAR:
		if ((rc = get_user(ival, (unsigned __user *) arg)) == 0)
			tty->termios->c_cflag =
				(tty->termios->c_cflag & ~CLOCAL) |
				(ival ? CLOCAL : 0);
		break;
	case TIOCGSERIAL:
		rc = stli_getserial(portp, argp);
		break;
	case TIOCSSERIAL:
		rc = stli_setserial(portp, argp);
		break;
	case STL_GETPFLAG:
		rc = put_user(portp->pflag, (unsigned __user *)argp);
		break;
	case STL_SETPFLAG:
		if ((rc = get_user(portp->pflag, (unsigned __user *)argp)) == 0)
			stli_setport(portp);
		break;
	case COM_GETPORTSTATS:
		rc = stli_getportstats(portp, argp);
		break;
	case COM_CLRPORTSTATS:
		rc = stli_clrportstats(portp, argp);
		break;
	case TIOCSERCONFIG:
	case TIOCSERGWILD:
	case TIOCSERSWILD:
	case TIOCSERGETLSR:
	case TIOCSERGSTRUCT:
	case TIOCSERGETMULTI:
	case TIOCSERSETMULTI:
	default:
		rc = -ENOIOCTLCMD;
		break;
	}

	return rc;
}

/*****************************************************************************/

/*
 *	This routine assumes that we have user context and can sleep.
 *	Looks like it is true for the current ttys implementation..!!
 */

static void stli_settermios(struct tty_struct *tty, struct termios *old)
{
	stliport_t *portp;
	stlibrd_t *brdp;
	struct termios *tiosp;
	asyport_t aport;

	if (tty == NULL)
		return;
	portp = tty->driver_data;
	if (portp == NULL)
		return;
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
		return;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return;

	tiosp = tty->termios;
	if ((tiosp->c_cflag == old->c_cflag) &&
	    (tiosp->c_iflag == old->c_iflag))
		return;

	stli_mkasyport(portp, &aport, tiosp);
	stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0);
	stli_mkasysigs(&portp->asig, ((tiosp->c_cflag & CBAUD) ? 1 : 0), -1);
	stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
		sizeof(asysigs_t), 0);
	if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0))
		tty->hw_stopped = 0;
	if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
		wake_up_interruptible(&portp->open_wait);
}

/*****************************************************************************/

/*
 *	Attempt to flow control who ever is sending us data. We won't really
 *	do any flow control action here. We can't directly, and even if we
 *	wanted to we would have to send a command to the slave. The slave
 *	knows how to flow control, and will do so when its buffers reach its
 *	internal high water marks. So what we will do is set a local state
 *	bit that will stop us sending any RX data up from the poll routine
 *	(which is the place where RX data from the slave is handled).
 */

static void stli_throttle(struct tty_struct *tty)
{
	stliport_t	*portp = tty->driver_data;
	if (portp == NULL)
		return;
	set_bit(ST_RXSTOP, &portp->state);
}

/*****************************************************************************/

/*
 *	Unflow control the device sending us data... That means that all
 *	we have to do is clear the RXSTOP state bit. The next poll call
 *	will then be able to pass the RX data back up.
 */

static void stli_unthrottle(struct tty_struct *tty)
{
	stliport_t	*portp = tty->driver_data;
	if (portp == NULL)
		return;
	clear_bit(ST_RXSTOP, &portp->state);
}

/*****************************************************************************/

/*
 *	Stop the transmitter.
 */

static void stli_stop(struct tty_struct *tty)
{
}

/*****************************************************************************/

/*
 *	Start the transmitter again.
 */

static void stli_start(struct tty_struct *tty)
{
}

/*****************************************************************************/

/*
 *	Scheduler called hang up routine. This is called from the scheduler,
 *	not direct from the driver "poll" routine. We can't call it there
 *	since the real local hangup code will enable/disable the board and
 *	other things that we can't do while handling the poll. Much easier
 *	to deal with it some time later (don't really care when, hangups
 *	aren't that time critical).
 */

static void stli_dohangup(void *arg)
{
	stliport_t *portp = (stliport_t *) arg;
	if (portp->tty != NULL) {
		tty_hangup(portp->tty);
	}
}

/*****************************************************************************/

/*
 *	Hangup this port. This is pretty much like closing the port, only
 *	a little more brutal. No waiting for data to drain. Shutdown the
 *	port and maybe drop signals. This is rather tricky really. We want
 *	to close the port as well.
 */

static void stli_hangup(struct tty_struct *tty)
{
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned long flags;

	portp = tty->driver_data;
	if (portp == NULL)
		return;
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
		return;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return;

	portp->flags &= ~ASYNC_INITIALIZED;

	if (!test_bit(ST_CLOSING, &portp->state))
		stli_rawclose(brdp, portp, 0, 0);

	spin_lock_irqsave(&stli_lock, flags);
	if (tty->termios->c_cflag & HUPCL) {
		stli_mkasysigs(&portp->asig, 0, 0);
		if (test_bit(ST_CMDING, &portp->state)) {
			set_bit(ST_DOSIGS, &portp->state);
			set_bit(ST_DOFLUSHTX, &portp->state);
			set_bit(ST_DOFLUSHRX, &portp->state);
		} else {
			stli_sendcmd(brdp, portp, A_SETSIGNALSF,
				&portp->asig, sizeof(asysigs_t), 0);
		}
	}

	clear_bit(ST_TXBUSY, &portp->state);
	clear_bit(ST_RXSTOP, &portp->state);
	set_bit(TTY_IO_ERROR, &tty->flags);
	portp->tty = NULL;
	portp->flags &= ~ASYNC_NORMAL_ACTIVE;
	portp->refcount = 0;
	spin_unlock_irqrestore(&stli_lock, flags);

	wake_up_interruptible(&portp->open_wait);
}

/*****************************************************************************/

/*
 *	Flush characters from the lower buffer. We may not have user context
 *	so we cannot sleep waiting for it to complete. Also we need to check
 *	if there is chars for this port in the TX cook buffer, and flush them
 *	as well.
 */

static void stli_flushbuffer(struct tty_struct *tty)
{
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned long ftype, flags;

	portp = tty->driver_data;
	if (portp == NULL)
		return;
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
		return;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return;

	spin_lock_irqsave(&brd_lock, flags);
	if (tty == stli_txcooktty) {
		stli_txcooktty = NULL;
		stli_txcooksize = 0;
		stli_txcookrealsize = 0;
	}
	if (test_bit(ST_CMDING, &portp->state)) {
		set_bit(ST_DOFLUSHTX, &portp->state);
	} else {
		ftype = FLUSHTX;
		if (test_bit(ST_DOFLUSHRX, &portp->state)) {
			ftype |= FLUSHRX;
			clear_bit(ST_DOFLUSHRX, &portp->state);
		}
		__stli_sendcmd(brdp, portp, A_FLUSH, &ftype, sizeof(u32), 0);
	}
	spin_unlock_irqrestore(&brd_lock, flags);
	tty_wakeup(tty);
}

/*****************************************************************************/

static void stli_breakctl(struct tty_struct *tty, int state)
{
	stlibrd_t	*brdp;
	stliport_t	*portp;
	long		arg;

	portp = tty->driver_data;
	if (portp == NULL)
		return;
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
		return;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return;

	arg = (state == -1) ? BREAKON : BREAKOFF;
	stli_cmdwait(brdp, portp, A_BREAK, &arg, sizeof(long), 0);
}

/*****************************************************************************/

static void stli_waituntilsent(struct tty_struct *tty, int timeout)
{
	stliport_t *portp;
	unsigned long tend;

	if (tty == NULL)
		return;
	portp = tty->driver_data;
	if (portp == NULL)
		return;

	if (timeout == 0)
		timeout = HZ;
	tend = jiffies + timeout;

	while (test_bit(ST_TXBUSY, &portp->state)) {
		if (signal_pending(current))
			break;
		msleep_interruptible(20);
		if (time_after_eq(jiffies, tend))
			break;
	}
}

/*****************************************************************************/

static void stli_sendxchar(struct tty_struct *tty, char ch)
{
	stlibrd_t	*brdp;
	stliport_t	*portp;
	asyctrl_t	actrl;

	portp = tty->driver_data;
	if (portp == NULL)
		return;
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
		return;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return;

	memset(&actrl, 0, sizeof(asyctrl_t));
	if (ch == STOP_CHAR(tty)) {
		actrl.rxctrl = CT_STOPFLOW;
	} else if (ch == START_CHAR(tty)) {
		actrl.rxctrl = CT_STARTFLOW;
	} else {
		actrl.txctrl = CT_SENDCHR;
		actrl.tximdch = ch;
	}
	stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t), 0);
}

/*****************************************************************************/

#define	MAXLINE		80

/*
 *	Format info for a specified port. The line is deliberately limited
 *	to 80 characters. (If it is too long it will be truncated, if too
 *	short then padded with spaces).
 */

static int stli_portinfo(stlibrd_t *brdp, stliport_t *portp, int portnr, char *pos)
{
	char *sp, *uart;
	int rc, cnt;

	rc = stli_portcmdstats(portp);

	uart = "UNKNOWN";
	if (brdp->state & BST_STARTED) {
		switch (stli_comstats.hwid) {
		case 0:	uart = "2681"; break;
		case 1:	uart = "SC26198"; break;
		default:uart = "CD1400"; break;
		}
	}

	sp = pos;
	sp += sprintf(sp, "%d: uart:%s ", portnr, uart);

	if ((brdp->state & BST_STARTED) && (rc >= 0)) {
		sp += sprintf(sp, "tx:%d rx:%d", (int) stli_comstats.txtotal,
			(int) stli_comstats.rxtotal);

		if (stli_comstats.rxframing)
			sp += sprintf(sp, " fe:%d",
				(int) stli_comstats.rxframing);
		if (stli_comstats.rxparity)
			sp += sprintf(sp, " pe:%d",
				(int) stli_comstats.rxparity);
		if (stli_comstats.rxbreaks)
			sp += sprintf(sp, " brk:%d",
				(int) stli_comstats.rxbreaks);
		if (stli_comstats.rxoverrun)
			sp += sprintf(sp, " oe:%d",
				(int) stli_comstats.rxoverrun);

		cnt = sprintf(sp, "%s%s%s%s%s ",
			(stli_comstats.signals & TIOCM_RTS) ? "|RTS" : "",
			(stli_comstats.signals & TIOCM_CTS) ? "|CTS" : "",
			(stli_comstats.signals & TIOCM_DTR) ? "|DTR" : "",
			(stli_comstats.signals & TIOCM_CD) ? "|DCD" : "",
			(stli_comstats.signals & TIOCM_DSR) ? "|DSR" : "");
		*sp = ' ';
		sp += cnt;
	}

	for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
		*sp++ = ' ';
	if (cnt >= MAXLINE)
		pos[(MAXLINE - 2)] = '+';
	pos[(MAXLINE - 1)] = '\n';

	return(MAXLINE);
}

/*****************************************************************************/

/*
 *	Port info, read from the /proc file system.
 */

static int stli_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
{
	stlibrd_t *brdp;
	stliport_t *portp;
	int brdnr, portnr, totalport;
	int curoff, maxoff;
	char *pos;

	pos = page;
	totalport = 0;
	curoff = 0;

	if (off == 0) {
		pos += sprintf(pos, "%s: version %s", stli_drvtitle,
			stli_drvversion);
		while (pos < (page + MAXLINE - 1))
			*pos++ = ' ';
		*pos++ = '\n';
	}
	curoff =  MAXLINE;

/*
 *	We scan through for each board, panel and port. The offset is
 *	calculated on the fly, and irrelevant ports are skipped.
 */
	for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) {
		brdp = stli_brds[brdnr];
		if (brdp == NULL)
			continue;
		if (brdp->state == 0)
			continue;

		maxoff = curoff + (brdp->nrports * MAXLINE);
		if (off >= maxoff) {
			curoff = maxoff;
			continue;
		}

		totalport = brdnr * STL_MAXPORTS;
		for (portnr = 0; (portnr < brdp->nrports); portnr++,
		    totalport++) {
			portp = brdp->ports[portnr];
			if (portp == NULL)
				continue;
			if (off >= (curoff += MAXLINE))
				continue;
			if ((pos - page + MAXLINE) > count)
				goto stli_readdone;
			pos += stli_portinfo(brdp, portp, totalport, pos);
		}
	}

	*eof = 1;

stli_readdone:
	*start = page;
	return(pos - page);
}

/*****************************************************************************/

/*
 *	Generic send command routine. This will send a message to the slave,
 *	of the specified type with the specified argument. Must be very
 *	careful of data that will be copied out from shared memory -
 *	containing command results. The command completion is all done from
 *	a poll routine that does not have user context. Therefore you cannot
 *	copy back directly into user space, or to the kernel stack of a
 *	process. This routine does not sleep, so can be called from anywhere.
 *
 *	The caller must hold the brd_lock (see also stli_sendcmd the usual
 *	entry point)
 */

static void __stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
{
	cdkhdr_t __iomem *hdrp;
	cdkctrl_t __iomem *cp;
	unsigned char __iomem *bits;
	unsigned long flags;

	spin_lock_irqsave(&brd_lock, flags);

	if (test_bit(ST_CMDING, &portp->state)) {
		printk(KERN_ERR "STALLION: command already busy, cmd=%x!\n",
				(int) cmd);
		spin_unlock_irqrestore(&brd_lock, flags);
		return;
	}

	EBRDENABLE(brdp);
	cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
	if (size > 0) {
		memcpy_toio((void __iomem *) &(cp->args[0]), arg, size);
		if (copyback) {
			portp->argp = arg;
			portp->argsize = size;
		}
	}
	writel(0, &cp->status);
	writel(cmd, &cp->cmd);
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
		portp->portidx;
	writeb(readb(bits) | portp->portbit, bits);
	set_bit(ST_CMDING, &portp->state);
	EBRDDISABLE(brdp);
	spin_unlock_irqrestore(&brd_lock, flags);
}

static void stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
{
	unsigned long		flags;

	spin_lock_irqsave(&brd_lock, flags);
	__stli_sendcmd(brdp, portp, cmd, arg, size, copyback);
	spin_unlock_irqrestore(&brd_lock, flags);
}

/*****************************************************************************/

/*
 *	Read data from shared memory. This assumes that the shared memory
 *	is enabled and that interrupts are off. Basically we just empty out
 *	the shared memory buffer into the tty buffer. Must be careful to
 *	handle the case where we fill up the tty buffer, but still have
 *	more chars to unload.
 */

static void stli_read(stlibrd_t *brdp, stliport_t *portp)
{
	cdkasyrq_t __iomem *rp;
	char __iomem *shbuf;
	struct tty_struct	*tty;
	unsigned int head, tail, size;
	unsigned int len, stlen;

	if (test_bit(ST_RXSTOP, &portp->state))
		return;
	tty = portp->tty;
	if (tty == NULL)
		return;

	rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
	head = (unsigned int) readw(&rp->head);
	if (head != ((unsigned int) readw(&rp->head)))
		head = (unsigned int) readw(&rp->head);
	tail = (unsigned int) readw(&rp->tail);
	size = portp->rxsize;
	if (head >= tail) {
		len = head - tail;
		stlen = len;
	} else {
		len = size - (tail - head);
		stlen = size - tail;
	}

	len = tty_buffer_request_room(tty, len);

	shbuf = (char __iomem *) EBRDGETMEMPTR(brdp, portp->rxoffset);

	while (len > 0) {
		unsigned char *cptr;

		stlen = MIN(len, stlen);
		tty_prepare_flip_string(tty, &cptr, stlen);
		memcpy_fromio(cptr, shbuf + tail, stlen);
		len -= stlen;
		tail += stlen;
		if (tail >= size) {
			tail = 0;
			stlen = head;
		}
	}
	rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
	writew(tail, &rp->tail);

	if (head != tail)
		set_bit(ST_RXING, &portp->state);

	tty_schedule_flip(tty);
}

/*****************************************************************************/

/*
 *	Set up and carry out any delayed commands. There is only a small set
 *	of slave commands that can be done "off-level". So it is not too
 *	difficult to deal with them here.
 */

static void stli_dodelaycmd(stliport_t *portp, cdkctrl_t __iomem *cp)
{
	int cmd;

	if (test_bit(ST_DOSIGS, &portp->state)) {
		if (test_bit(ST_DOFLUSHTX, &portp->state) &&
		    test_bit(ST_DOFLUSHRX, &portp->state))
			cmd = A_SETSIGNALSF;
		else if (test_bit(ST_DOFLUSHTX, &portp->state))
			cmd = A_SETSIGNALSFTX;
		else if (test_bit(ST_DOFLUSHRX, &portp->state))
			cmd = A_SETSIGNALSFRX;
		else
			cmd = A_SETSIGNALS;
		clear_bit(ST_DOFLUSHTX, &portp->state);
		clear_bit(ST_DOFLUSHRX, &portp->state);
		clear_bit(ST_DOSIGS, &portp->state);
		memcpy_toio((void __iomem *) &(cp->args[0]), (void *) &portp->asig,
			sizeof(asysigs_t));
		writel(0, &cp->status);
		writel(cmd, &cp->cmd);
		set_bit(ST_CMDING, &portp->state);
	} else if (test_bit(ST_DOFLUSHTX, &portp->state) ||
	    test_bit(ST_DOFLUSHRX, &portp->state)) {
		cmd = ((test_bit(ST_DOFLUSHTX, &portp->state)) ? FLUSHTX : 0);
		cmd |= ((test_bit(ST_DOFLUSHRX, &portp->state)) ? FLUSHRX : 0);
		clear_bit(ST_DOFLUSHTX, &portp->state);
		clear_bit(ST_DOFLUSHRX, &portp->state);
		memcpy_toio((void __iomem *) &(cp->args[0]), (void *) &cmd, sizeof(int));
		writel(0, &cp->status);
		writel(A_FLUSH, &cp->cmd);
		set_bit(ST_CMDING, &portp->state);
	}
}

/*****************************************************************************/

/*
 *	Host command service checking. This handles commands or messages
 *	coming from the slave to the host. Must have board shared memory
 *	enabled and interrupts off when called. Notice that by servicing the
 *	read data last we don't need to change the shared memory pointer
 *	during processing (which is a slow IO operation).
 *	Return value indicates if this port is still awaiting actions from
 *	the slave (like open, command, or even TX data being sent). If 0
 *	then port is still busy, otherwise no longer busy.
 */

static int stli_hostcmd(stlibrd_t *brdp, stliport_t *portp)
{
	cdkasy_t __iomem *ap;
	cdkctrl_t __iomem *cp;
	struct tty_struct *tty;
	asynotify_t nt;
	unsigned long oldsigs;
	int rc, donerx;

	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	cp = &ap->ctrl;

/*
 *	Check if we are waiting for an open completion message.
 */
	if (test_bit(ST_OPENING, &portp->state)) {
		rc = readl(&cp->openarg);
		if (readb(&cp->open) == 0 && rc != 0) {
			if (rc > 0)
				rc--;
			writel(0, &cp->openarg);
			portp->rc = rc;
			clear_bit(ST_OPENING, &portp->state);
			wake_up_interruptible(&portp->raw_wait);
		}
	}

/*
 *	Check if we are waiting for a close completion message.
 */
	if (test_bit(ST_CLOSING, &portp->state)) {
		rc = (int) readl(&cp->closearg);
		if (readb(&cp->close) == 0 && rc != 0) {
			if (rc > 0)
				rc--;
			writel(0, &cp->closearg);
			portp->rc = rc;
			clear_bit(ST_CLOSING, &portp->state);
			wake_up_interruptible(&portp->raw_wait);
		}
	}

/*
 *	Check if we are waiting for a command completion message. We may
 *	need to copy out the command results associated with this command.
 */
	if (test_bit(ST_CMDING, &portp->state)) {
		rc = readl(&cp->status);
		if (readl(&cp->cmd) == 0 && rc != 0) {
			if (rc > 0)
				rc--;
			if (portp->argp != NULL) {
				memcpy_fromio(portp->argp, (void __iomem *) &(cp->args[0]),
					portp->argsize);
				portp->argp = NULL;
			}
			writel(0, &cp->status);
			portp->rc = rc;
			clear_bit(ST_CMDING, &portp->state);
			stli_dodelaycmd(portp, cp);
			wake_up_interruptible(&portp->raw_wait);
		}
	}

/*
 *	Check for any notification messages ready. This includes lots of
 *	different types of events - RX chars ready, RX break received,
 *	TX data low or empty in the slave, modem signals changed state.
 */
	donerx = 0;

	if (ap->notify) {
		nt = ap->changed;
		ap->notify = 0;
		tty = portp->tty;

		if (nt.signal & SG_DCD) {
			oldsigs = portp->sigs;
			portp->sigs = stli_mktiocm(nt.sigvalue);
			clear_bit(ST_GETSIGS, &portp->state);
			if ((portp->sigs & TIOCM_CD) &&
			    ((oldsigs & TIOCM_CD) == 0))
				wake_up_interruptible(&portp->open_wait);
			if ((oldsigs & TIOCM_CD) &&
			    ((portp->sigs & TIOCM_CD) == 0)) {
				if (portp->flags & ASYNC_CHECK_CD) {
					if (tty)
						schedule_work(&portp->tqhangup);
				}
			}
		}

		if (nt.data & DT_TXEMPTY)
			clear_bit(ST_TXBUSY, &portp->state);
		if (nt.data & (DT_TXEMPTY | DT_TXLOW)) {
			if (tty != NULL) {
				tty_wakeup(tty);
				EBRDENABLE(brdp);
				wake_up_interruptible(&tty->write_wait);
			}
		}

		if ((nt.data & DT_RXBREAK) && (portp->rxmarkmsk & BRKINT)) {
			if (tty != NULL) {
				tty_insert_flip_char(tty, 0, TTY_BREAK);
				if (portp->flags & ASYNC_SAK) {
					do_SAK(tty);
					EBRDENABLE(brdp);
				}
				tty_schedule_flip(tty);
			}
		}

		if (nt.data & DT_RXBUSY) {
			donerx++;
			stli_read(brdp, portp);
		}
	}

/*
 *	It might seem odd that we are checking for more RX chars here.
 *	But, we need to handle the case where the tty buffer was previously
 *	filled, but we had more characters to pass up. The slave will not
 *	send any more RX notify messages until the RX buffer has been emptied.
 *	But it will leave the service bits on (since the buffer is not empty).
 *	So from here we can try to process more RX chars.
 */
	if ((!donerx) && test_bit(ST_RXING, &portp->state)) {
		clear_bit(ST_RXING, &portp->state);
		stli_read(brdp, portp);
	}

	return((test_bit(ST_OPENING, &portp->state) ||
		test_bit(ST_CLOSING, &portp->state) ||
		test_bit(ST_CMDING, &portp->state) ||
		test_bit(ST_TXBUSY, &portp->state) ||
		test_bit(ST_RXING, &portp->state)) ? 0 : 1);
}

/*****************************************************************************/

/*
 *	Service all ports on a particular board. Assumes that the boards
 *	shared memory is enabled, and that the page pointer is pointed
 *	at the cdk header structure.
 */

static void stli_brdpoll(stlibrd_t *brdp, cdkhdr_t __iomem *hdrp)
{
	stliport_t *portp;
	unsigned char hostbits[(STL_MAXCHANS / 8) + 1];
	unsigned char slavebits[(STL_MAXCHANS / 8) + 1];
	unsigned char __iomem *slavep;
	int bitpos, bitat, bitsize;
	int channr, nrdevs, slavebitchange;

	bitsize = brdp->bitsize;
	nrdevs = brdp->nrdevs;

/*
 *	Check if slave wants any service. Basically we try to do as
 *	little work as possible here. There are 2 levels of service
 *	bits. So if there is nothing to do we bail early. We check
 *	8 service bits at a time in the inner loop, so we can bypass
 *	the lot if none of them want service.
 */
	memcpy_fromio(&hostbits[0], (((unsigned char __iomem *) hdrp) + brdp->hostoffset),
		bitsize);

	memset(&slavebits[0], 0, bitsize);
	slavebitchange = 0;

	for (bitpos = 0; (bitpos < bitsize); bitpos++) {
		if (hostbits[bitpos] == 0)
			continue;
		channr = bitpos * 8;
		for (bitat = 0x1; (channr < nrdevs); channr++, bitat <<= 1) {
			if (hostbits[bitpos] & bitat) {
				portp = brdp->ports[(channr - 1)];
				if (stli_hostcmd(brdp, portp)) {
					slavebitchange++;
					slavebits[bitpos] |= bitat;
				}
			}
		}
	}

/*
 *	If any of the ports are no longer busy then update them in the
 *	slave request bits. We need to do this after, since a host port
 *	service may initiate more slave requests.
 */
	if (slavebitchange) {
		hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
		slavep = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset;
		for (bitpos = 0; (bitpos < bitsize); bitpos++) {
			if (readb(slavebits + bitpos))
				writeb(readb(slavep + bitpos) & ~slavebits[bitpos], slavebits + bitpos);
		}
	}
}

/*****************************************************************************/

/*
 *	Driver poll routine. This routine polls the boards in use and passes
 *	messages back up to host when necessary. This is actually very
 *	CPU efficient, since we will always have the kernel poll clock, it
 *	adds only a few cycles when idle (since board service can be
 *	determined very easily), but when loaded generates no interrupts
 *	(with their expensive associated context change).
 */

static void stli_poll(unsigned long arg)
{
	cdkhdr_t __iomem *hdrp;
	stlibrd_t *brdp;
	int brdnr;

	stli_timerlist.expires = STLI_TIMEOUT;
	add_timer(&stli_timerlist);

/*
 *	Check each board and do any servicing required.
 */
	for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) {
		brdp = stli_brds[brdnr];
		if (brdp == NULL)
			continue;
		if ((brdp->state & BST_STARTED) == 0)
			continue;

		spin_lock(&brd_lock);
		EBRDENABLE(brdp);
		hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
		if (readb(&hdrp->hostreq))
			stli_brdpoll(brdp, hdrp);
		EBRDDISABLE(brdp);
		spin_unlock(&brd_lock);
	}
}

/*****************************************************************************/

/*
 *	Translate the termios settings into the port setting structure of
 *	the slave.
 */

static void stli_mkasyport(stliport_t *portp, asyport_t *pp, struct termios *tiosp)
{
	memset(pp, 0, sizeof(asyport_t));

/*
 *	Start of by setting the baud, char size, parity and stop bit info.
 */
	pp->baudout = tty_get_baud_rate(portp->tty);
	if ((tiosp->c_cflag & CBAUD) == B38400) {
		if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
			pp->baudout = 57600;
		else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
			pp->baudout = 115200;
		else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
			pp->baudout = 230400;
		else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
			pp->baudout = 460800;
		else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
			pp->baudout = (portp->baud_base / portp->custom_divisor);
	}
	if (pp->baudout > STL_MAXBAUD)
		pp->baudout = STL_MAXBAUD;
	pp->baudin = pp->baudout;

	switch (tiosp->c_cflag & CSIZE) {
	case CS5:
		pp->csize = 5;
		break;
	case CS6:
		pp->csize = 6;
		break;
	case CS7:
		pp->csize = 7;
		break;
	default:
		pp->csize = 8;
		break;
	}

	if (tiosp->c_cflag & CSTOPB)
		pp->stopbs = PT_STOP2;
	else
		pp->stopbs = PT_STOP1;

	if (tiosp->c_cflag & PARENB) {
		if (tiosp->c_cflag & PARODD)
			pp->parity = PT_ODDPARITY;
		else
			pp->parity = PT_EVENPARITY;
	} else {
		pp->parity = PT_NOPARITY;
	}

/*
 *	Set up any flow control options enabled.
 */
	if (tiosp->c_iflag & IXON) {
		pp->flow |= F_IXON;
		if (tiosp->c_iflag & IXANY)
			pp->flow |= F_IXANY;
	}
	if (tiosp->c_cflag & CRTSCTS)
		pp->flow |= (F_RTSFLOW | F_CTSFLOW);

	pp->startin = tiosp->c_cc[VSTART];
	pp->stopin = tiosp->c_cc[VSTOP];
	pp->startout = tiosp->c_cc[VSTART];
	pp->stopout = tiosp->c_cc[VSTOP];

/*
 *	Set up the RX char marking mask with those RX error types we must
 *	catch. We can get the slave to help us out a little here, it will
 *	ignore parity errors and breaks for us, and mark parity errors in
 *	the data stream.
 */
	if (tiosp->c_iflag & IGNPAR)
		pp->iflag |= FI_IGNRXERRS;
	if (tiosp->c_iflag & IGNBRK)
		pp->iflag |= FI_IGNBREAK;

	portp->rxmarkmsk = 0;
	if (tiosp->c_iflag & (INPCK | PARMRK))
		pp->iflag |= FI_1MARKRXERRS;
	if (tiosp->c_iflag & BRKINT)
		portp->rxmarkmsk |= BRKINT;

/*
 *	Set up clocal processing as required.
 */
	if (tiosp->c_cflag & CLOCAL)
		portp->flags &= ~ASYNC_CHECK_CD;
	else
		portp->flags |= ASYNC_CHECK_CD;

/*
 *	Transfer any persistent flags into the asyport structure.
 */
	pp->pflag = (portp->pflag & 0xffff);
	pp->vmin = (portp->pflag & P_RXIMIN) ? 1 : 0;
	pp->vtime = (portp->pflag & P_RXITIME) ? 1 : 0;
	pp->cc[1] = (portp->pflag & P_RXTHOLD) ? 1 : 0;
}

/*****************************************************************************/

/*
 *	Construct a slave signals structure for setting the DTR and RTS
 *	signals as specified.
 */

static void stli_mkasysigs(asysigs_t *sp, int dtr, int rts)
{
	memset(sp, 0, sizeof(asysigs_t));
	if (dtr >= 0) {
		sp->signal |= SG_DTR;
		sp->sigvalue |= ((dtr > 0) ? SG_DTR : 0);
	}
	if (rts >= 0) {
		sp->signal |= SG_RTS;
		sp->sigvalue |= ((rts > 0) ? SG_RTS : 0);
	}
}

/*****************************************************************************/

/*
 *	Convert the signals returned from the slave into a local TIOCM type
 *	signals value. We keep them locally in TIOCM format.
 */

static long stli_mktiocm(unsigned long sigvalue)
{
	long	tiocm = 0;
	tiocm |= ((sigvalue & SG_DCD) ? TIOCM_CD : 0);
	tiocm |= ((sigvalue & SG_CTS) ? TIOCM_CTS : 0);
	tiocm |= ((sigvalue & SG_RI) ? TIOCM_RI : 0);
	tiocm |= ((sigvalue & SG_DSR) ? TIOCM_DSR : 0);
	tiocm |= ((sigvalue & SG_DTR) ? TIOCM_DTR : 0);
	tiocm |= ((sigvalue & SG_RTS) ? TIOCM_RTS : 0);
	return(tiocm);
}

/*****************************************************************************/

/*
 *	All panels and ports actually attached have been worked out. All
 *	we need to do here is set up the appropriate per port data structures.
 */

static int stli_initports(stlibrd_t *brdp)
{
	stliport_t	*portp;
	int		i, panelnr, panelport;

	for (i = 0, panelnr = 0, panelport = 0; (i < brdp->nrports); i++) {
		portp = kzalloc(sizeof(stliport_t), GFP_KERNEL);
		if (!portp) {
			printk("STALLION: failed to allocate port structure\n");
			continue;
		}

		portp->magic = STLI_PORTMAGIC;
		portp->portnr = i;
		portp->brdnr = brdp->brdnr;
		portp->panelnr = panelnr;
		portp->baud_base = STL_BAUDBASE;
		portp->close_delay = STL_CLOSEDELAY;
		portp->closing_wait = 30 * HZ;
		INIT_WORK(&portp->tqhangup, stli_dohangup, portp);
		init_waitqueue_head(&portp->open_wait);
		init_waitqueue_head(&portp->close_wait);
		init_waitqueue_head(&portp->raw_wait);
		panelport++;
		if (panelport >= brdp->panels[panelnr]) {
			panelport = 0;
			panelnr++;
		}
		brdp->ports[i] = portp;
	}

	return 0;
}

/*****************************************************************************/

/*
 *	All the following routines are board specific hardware operations.
 */

static void stli_ecpinit(stlibrd_t *brdp)
{
	unsigned long	memconf;

	outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
	udelay(10);
	outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
	udelay(100);

	memconf = (brdp->memaddr & ECP_ATADDRMASK) >> ECP_ATADDRSHFT;
	outb(memconf, (brdp->iobase + ECP_ATMEMAR));
}

/*****************************************************************************/

static void stli_ecpenable(stlibrd_t *brdp)
{	
	outb(ECP_ATENABLE, (brdp->iobase + ECP_ATCONFR));
}

/*****************************************************************************/

static void stli_ecpdisable(stlibrd_t *brdp)
{	
	outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
}

/*****************************************************************************/

static char *stli_ecpgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
	void *ptr;
	unsigned char val;

	if (offset > brdp->memsize) {
		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
				"range at line=%d(%d), brd=%d\n",
			(int) offset, line, __LINE__, brdp->brdnr);
		ptr = NULL;
		val = 0;
	} else {
		ptr = brdp->membase + (offset % ECP_ATPAGESIZE);
		val = (unsigned char) (offset / ECP_ATPAGESIZE);
	}
	outb(val, (brdp->iobase + ECP_ATMEMPR));
	return(ptr);
}

/*****************************************************************************/

static void stli_ecpreset(stlibrd_t *brdp)
{	
	outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
	udelay(10);
	outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
	udelay(500);
}

/*****************************************************************************/

static void stli_ecpintr(stlibrd_t *brdp)
{	
	outb(0x1, brdp->iobase);
}

/*****************************************************************************/

/*
 *	The following set of functions act on ECP EISA boards.
 */

static void stli_ecpeiinit(stlibrd_t *brdp)
{
	unsigned long	memconf;

	outb(0x1, (brdp->iobase + ECP_EIBRDENAB));
	outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
	udelay(10);
	outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
	udelay(500);

	memconf = (brdp->memaddr & ECP_EIADDRMASKL) >> ECP_EIADDRSHFTL;
	outb(memconf, (brdp->iobase + ECP_EIMEMARL));
	memconf = (brdp->memaddr & ECP_EIADDRMASKH) >> ECP_EIADDRSHFTH;
	outb(memconf, (brdp->iobase + ECP_EIMEMARH));
}

/*****************************************************************************/

static void stli_ecpeienable(stlibrd_t *brdp)
{	
	outb(ECP_EIENABLE, (brdp->iobase + ECP_EICONFR));
}

/*****************************************************************************/

static void stli_ecpeidisable(stlibrd_t *brdp)
{	
	outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
}

/*****************************************************************************/

static char *stli_ecpeigetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
	void		*ptr;
	unsigned char	val;

	if (offset > brdp->memsize) {
		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
				"range at line=%d(%d), brd=%d\n",
			(int) offset, line, __LINE__, brdp->brdnr);
		ptr = NULL;
		val = 0;
	} else {
		ptr = brdp->membase + (offset % ECP_EIPAGESIZE);
		if (offset < ECP_EIPAGESIZE)
			val = ECP_EIENABLE;
		else
			val = ECP_EIENABLE | 0x40;
	}
	outb(val, (brdp->iobase + ECP_EICONFR));
	return(ptr);
}

/*****************************************************************************/

static void stli_ecpeireset(stlibrd_t *brdp)
{	
	outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
	udelay(10);
	outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
	udelay(500);
}

/*****************************************************************************/

/*
 *	The following set of functions act on ECP MCA boards.
 */

static void stli_ecpmcenable(stlibrd_t *brdp)
{	
	outb(ECP_MCENABLE, (brdp->iobase + ECP_MCCONFR));
}

/*****************************************************************************/

static void stli_ecpmcdisable(stlibrd_t *brdp)
{	
	outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
}

/*****************************************************************************/

static char *stli_ecpmcgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
	void *ptr;
	unsigned char val;

	if (offset > brdp->memsize) {
		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
				"range at line=%d(%d), brd=%d\n",
			(int) offset, line, __LINE__, brdp->brdnr);
		ptr = NULL;
		val = 0;
	} else {
		ptr = brdp->membase + (offset % ECP_MCPAGESIZE);
		val = ((unsigned char) (offset / ECP_MCPAGESIZE)) | ECP_MCENABLE;
	}
	outb(val, (brdp->iobase + ECP_MCCONFR));
	return(ptr);
}

/*****************************************************************************/

static void stli_ecpmcreset(stlibrd_t *brdp)
{	
	outb(ECP_MCSTOP, (brdp->iobase + ECP_MCCONFR));
	udelay(10);
	outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
	udelay(500);
}

/*****************************************************************************/

/*
 *	The following set of functions act on ECP PCI boards.
 */

static void stli_ecppciinit(stlibrd_t *brdp)
{
	outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR));
	udelay(10);
	outb(0, (brdp->iobase + ECP_PCICONFR));
	udelay(500);
}

/*****************************************************************************/

static char *stli_ecppcigetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
	void		*ptr;
	unsigned char	val;

	if (offset > brdp->memsize) {
		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
				"range at line=%d(%d), board=%d\n",
				(int) offset, line, __LINE__, brdp->brdnr);
		ptr = NULL;
		val = 0;
	} else {
		ptr = brdp->membase + (offset % ECP_PCIPAGESIZE);
		val = (offset / ECP_PCIPAGESIZE) << 1;
	}
	outb(val, (brdp->iobase + ECP_PCICONFR));
	return(ptr);
}

/*****************************************************************************/

static void stli_ecppcireset(stlibrd_t *brdp)
{	
	outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR));
	udelay(10);
	outb(0, (brdp->iobase + ECP_PCICONFR));
	udelay(500);
}

/*****************************************************************************/

/*
 *	The following routines act on ONboards.
 */

static void stli_onbinit(stlibrd_t *brdp)
{
	unsigned long	memconf;

	outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR));
	udelay(10);
	outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
	mdelay(1000);

	memconf = (brdp->memaddr & ONB_ATADDRMASK) >> ONB_ATADDRSHFT;
	outb(memconf, (brdp->iobase + ONB_ATMEMAR));
	outb(0x1, brdp->iobase);
	mdelay(1);
}

/*****************************************************************************/

static void stli_onbenable(stlibrd_t *brdp)
{	
	outb((brdp->enabval | ONB_ATENABLE), (brdp->iobase + ONB_ATCONFR));
}

/*****************************************************************************/

static void stli_onbdisable(stlibrd_t *brdp)
{	
	outb((brdp->enabval | ONB_ATDISABLE), (brdp->iobase + ONB_ATCONFR));
}

/*****************************************************************************/

static char *stli_onbgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
	void	*ptr;

	if (offset > brdp->memsize) {
		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
				"range at line=%d(%d), brd=%d\n",
				(int) offset, line, __LINE__, brdp->brdnr);
		ptr = NULL;
	} else {
		ptr = brdp->membase + (offset % ONB_ATPAGESIZE);
	}
	return(ptr);
}

/*****************************************************************************/

static void stli_onbreset(stlibrd_t *brdp)
{	
	outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR));
	udelay(10);
	outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
	mdelay(1000);
}

/*****************************************************************************/

/*
 *	The following routines act on ONboard EISA.
 */

static void stli_onbeinit(stlibrd_t *brdp)
{
	unsigned long	memconf;

	outb(0x1, (brdp->iobase + ONB_EIBRDENAB));
	outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
	udelay(10);
	outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
	mdelay(1000);

	memconf = (brdp->memaddr & ONB_EIADDRMASKL) >> ONB_EIADDRSHFTL;
	outb(memconf, (brdp->iobase + ONB_EIMEMARL));
	memconf = (brdp->memaddr & ONB_EIADDRMASKH) >> ONB_EIADDRSHFTH;
	outb(memconf, (brdp->iobase + ONB_EIMEMARH));
	outb(0x1, brdp->iobase);
	mdelay(1);
}

/*****************************************************************************/

static void stli_onbeenable(stlibrd_t *brdp)
{	
	outb(ONB_EIENABLE, (brdp->iobase + ONB_EICONFR));
}

/*****************************************************************************/

static void stli_onbedisable(stlibrd_t *brdp)
{	
	outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
}

/*****************************************************************************/

static char *stli_onbegetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
	void *ptr;
	unsigned char val;

	if (offset > brdp->memsize) {
		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
				"range at line=%d(%d), brd=%d\n",
			(int) offset, line, __LINE__, brdp->brdnr);
		ptr = NULL;
		val = 0;
	} else {
		ptr = brdp->membase + (offset % ONB_EIPAGESIZE);
		if (offset < ONB_EIPAGESIZE)
			val = ONB_EIENABLE;
		else
			val = ONB_EIENABLE | 0x40;
	}
	outb(val, (brdp->iobase + ONB_EICONFR));
	return(ptr);
}

/*****************************************************************************/

static void stli_onbereset(stlibrd_t *brdp)
{	
	outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
	udelay(10);
	outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
	mdelay(1000);
}

/*****************************************************************************/

/*
 *	The following routines act on Brumby boards.
 */

static void stli_bbyinit(stlibrd_t *brdp)
{
	outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
	udelay(10);
	outb(0, (brdp->iobase + BBY_ATCONFR));
	mdelay(1000);
	outb(0x1, brdp->iobase);
	mdelay(1);
}

/*****************************************************************************/

static char *stli_bbygetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
	void *ptr;
	unsigned char val;

	BUG_ON(offset > brdp->memsize);

	ptr = brdp->membase + (offset % BBY_PAGESIZE);
	val = (unsigned char) (offset / BBY_PAGESIZE);
	outb(val, (brdp->iobase + BBY_ATCONFR));
	return(ptr);
}

/*****************************************************************************/

static void stli_bbyreset(stlibrd_t *brdp)
{	
	outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
	udelay(10);
	outb(0, (brdp->iobase + BBY_ATCONFR));
	mdelay(1000);
}

/*****************************************************************************/

/*
 *	The following routines act on original old Stallion boards.
 */

static void stli_stalinit(stlibrd_t *brdp)
{
	outb(0x1, brdp->iobase);
	mdelay(1000);
}

/*****************************************************************************/

static char *stli_stalgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
	BUG_ON(offset > brdp->memsize);
	return brdp->membase + (offset % STAL_PAGESIZE);
}

/*****************************************************************************/

static void stli_stalreset(stlibrd_t *brdp)
{	
	u32 __iomem *vecp;

	vecp = (u32 __iomem *) (brdp->membase + 0x30);
	writel(0xffff0000, vecp);
	outb(0, brdp->iobase);
	mdelay(1000);
}

/*****************************************************************************/

/*
 *	Try to find an ECP board and initialize it. This handles only ECP
 *	board types.
 */

static int stli_initecp(stlibrd_t *brdp)
{
	cdkecpsig_t sig;
	cdkecpsig_t __iomem *sigsp;
	unsigned int status, nxtid;
	char *name;
	int panelnr, nrports;

	if (!request_region(brdp->iobase, brdp->iosize, "istallion"))
		return -EIO;
	
	if ((brdp->iobase == 0) || (brdp->memaddr == 0))
	{
		release_region(brdp->iobase, brdp->iosize);
		return -ENODEV;
	}

	brdp->iosize = ECP_IOSIZE;

/*
 *	Based on the specific board type setup the common vars to access
 *	and enable shared memory. Set all board specific information now
 *	as well.
 */
	switch (brdp->brdtype) {
	case BRD_ECP:
		brdp->membase = (void *) brdp->memaddr;
		brdp->memsize = ECP_MEMSIZE;
		brdp->pagesize = ECP_ATPAGESIZE;
		brdp->init = stli_ecpinit;
		brdp->enable = stli_ecpenable;
		brdp->reenable = stli_ecpenable;
		brdp->disable = stli_ecpdisable;
		brdp->getmemptr = stli_ecpgetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_ecpreset;
		name = "serial(EC8/64)";
		break;

	case BRD_ECPE:
		brdp->membase = (void *) brdp->memaddr;
		brdp->memsize = ECP_MEMSIZE;
		brdp->pagesize = ECP_EIPAGESIZE;
		brdp->init = stli_ecpeiinit;
		brdp->enable = stli_ecpeienable;
		brdp->reenable = stli_ecpeienable;
		brdp->disable = stli_ecpeidisable;
		brdp->getmemptr = stli_ecpeigetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_ecpeireset;
		name = "serial(EC8/64-EI)";
		break;

	case BRD_ECPMC:
		brdp->membase = (void *) brdp->memaddr;
		brdp->memsize = ECP_MEMSIZE;
		brdp->pagesize = ECP_MCPAGESIZE;
		brdp->init = NULL;
		brdp->enable = stli_ecpmcenable;
		brdp->reenable = stli_ecpmcenable;
		brdp->disable = stli_ecpmcdisable;
		brdp->getmemptr = stli_ecpmcgetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_ecpmcreset;
		name = "serial(EC8/64-MCA)";
		break;

	case BRD_ECPPCI:
		brdp->membase = (void *) brdp->memaddr;
		brdp->memsize = ECP_PCIMEMSIZE;
		brdp->pagesize = ECP_PCIPAGESIZE;
		brdp->init = stli_ecppciinit;
		brdp->enable = NULL;
		brdp->reenable = NULL;
		brdp->disable = NULL;
		brdp->getmemptr = stli_ecppcigetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_ecppcireset;
		name = "serial(EC/RA-PCI)";
		break;

	default:
		release_region(brdp->iobase, brdp->iosize);
		return -EINVAL;
	}

/*
 *	The per-board operations structure is all set up, so now let's go
 *	and get the board operational. Firstly initialize board configuration
 *	registers. Set the memory mapping info so we can get at the boards
 *	shared memory.
 */
	EBRDINIT(brdp);

	brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
	if (brdp->membase == NULL)
	{
		release_region(brdp->iobase, brdp->iosize);
		return -ENOMEM;
	}

/*
 *	Now that all specific code is set up, enable the shared memory and
 *	look for the a signature area that will tell us exactly what board
 *	this is, and what it is connected to it.
 */
	EBRDENABLE(brdp);
	sigsp = (cdkecpsig_t __iomem *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
	memcpy_fromio(&sig, sigsp, sizeof(cdkecpsig_t));
	EBRDDISABLE(brdp);

	if (sig.magic != cpu_to_le32(ECP_MAGIC))
	{
		release_region(brdp->iobase, brdp->iosize);
		return -ENODEV;
	}

/*
 *	Scan through the signature looking at the panels connected to the
 *	board. Calculate the total number of ports as we go.
 */
	for (panelnr = 0, nxtid = 0; (panelnr < STL_MAXPANELS); panelnr++) {
		status = sig.panelid[nxtid];
		if ((status & ECH_PNLIDMASK) != nxtid)
			break;

		brdp->panelids[panelnr] = status;
		nrports = (status & ECH_PNL16PORT) ? 16 : 8;
		if ((nrports == 16) && ((status & ECH_PNLXPID) == 0))
			nxtid++;
		brdp->panels[panelnr] = nrports;
		brdp->nrports += nrports;
		nxtid++;
		brdp->nrpanels++;
	}


	brdp->state |= BST_FOUND;
	return 0;
}

/*****************************************************************************/

/*
 *	Try to find an ONboard, Brumby or Stallion board and initialize it.
 *	This handles only these board types.
 */

static int stli_initonb(stlibrd_t *brdp)
{
	cdkonbsig_t sig;
	cdkonbsig_t __iomem *sigsp;
	char *name;
	int i;

/*
 *	Do a basic sanity check on the IO and memory addresses.
 */
	if (brdp->iobase == 0 || brdp->memaddr == 0)
		return -ENODEV;

	brdp->iosize = ONB_IOSIZE;
	
	if (!request_region(brdp->iobase, brdp->iosize, "istallion"))
		return -EIO;

/*
 *	Based on the specific board type setup the common vars to access
 *	and enable shared memory. Set all board specific information now
 *	as well.
 */
	switch (brdp->brdtype) {
	case BRD_ONBOARD:
	case BRD_ONBOARD32:
	case BRD_ONBOARD2:
	case BRD_ONBOARD2_32:
	case BRD_ONBOARDRS:
		brdp->memsize = ONB_MEMSIZE;
		brdp->pagesize = ONB_ATPAGESIZE;
		brdp->init = stli_onbinit;
		brdp->enable = stli_onbenable;
		brdp->reenable = stli_onbenable;
		brdp->disable = stli_onbdisable;
		brdp->getmemptr = stli_onbgetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_onbreset;
		if (brdp->memaddr > 0x100000)
			brdp->enabval = ONB_MEMENABHI;
		else
			brdp->enabval = ONB_MEMENABLO;
		name = "serial(ONBoard)";
		break;

	case BRD_ONBOARDE:
		brdp->memsize = ONB_EIMEMSIZE;
		brdp->pagesize = ONB_EIPAGESIZE;
		brdp->init = stli_onbeinit;
		brdp->enable = stli_onbeenable;
		brdp->reenable = stli_onbeenable;
		brdp->disable = stli_onbedisable;
		brdp->getmemptr = stli_onbegetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_onbereset;
		name = "serial(ONBoard/E)";
		break;

	case BRD_BRUMBY4:
	case BRD_BRUMBY8:
	case BRD_BRUMBY16:
		brdp->memsize = BBY_MEMSIZE;
		brdp->pagesize = BBY_PAGESIZE;
		brdp->init = stli_bbyinit;
		brdp->enable = NULL;
		brdp->reenable = NULL;
		brdp->disable = NULL;
		brdp->getmemptr = stli_bbygetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_bbyreset;
		name = "serial(Brumby)";
		break;

	case BRD_STALLION:
		brdp->memsize = STAL_MEMSIZE;
		brdp->pagesize = STAL_PAGESIZE;
		brdp->init = stli_stalinit;
		brdp->enable = NULL;
		brdp->reenable = NULL;
		brdp->disable = NULL;
		brdp->getmemptr = stli_stalgetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_stalreset;
		name = "serial(Stallion)";
		break;

	default:
		release_region(brdp->iobase, brdp->iosize);
		return -EINVAL;
	}

/*
 *	The per-board operations structure is all set up, so now let's go
 *	and get the board operational. Firstly initialize board configuration
 *	registers. Set the memory mapping info so we can get at the boards
 *	shared memory.
 */
	EBRDINIT(brdp);

	brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
	if (brdp->membase == NULL)
	{
		release_region(brdp->iobase, brdp->iosize);
		return -ENOMEM;
	}

/*
 *	Now that all specific code is set up, enable the shared memory and
 *	look for the a signature area that will tell us exactly what board
 *	this is, and how many ports.
 */
	EBRDENABLE(brdp);
	sigsp = (cdkonbsig_t __iomem *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
	memcpy_fromio(&sig, sigsp, sizeof(cdkonbsig_t));
	EBRDDISABLE(brdp);

	if (sig.magic0 != cpu_to_le16(ONB_MAGIC0) ||
	    sig.magic1 != cpu_to_le16(ONB_MAGIC1) ||
	    sig.magic2 != cpu_to_le16(ONB_MAGIC2) ||
	    sig.magic3 != cpu_to_le16(ONB_MAGIC3))
	{
		release_region(brdp->iobase, brdp->iosize);
		return -ENODEV;
	}

/*
 *	Scan through the signature alive mask and calculate how many ports
 *	there are on this board.
 */
	brdp->nrpanels = 1;
	if (sig.amask1) {
		brdp->nrports = 32;
	} else {
		for (i = 0; (i < 16); i++) {
			if (((sig.amask0 << i) & 0x8000) == 0)
				break;
		}
		brdp->nrports = i;
	}
	brdp->panels[0] = brdp->nrports;


	brdp->state |= BST_FOUND;
	return 0;
}

/*****************************************************************************/

/*
 *	Start up a running board. This routine is only called after the
 *	code has been down loaded to the board and is operational. It will
 *	read in the memory map, and get the show on the road...
 */

static int stli_startbrd(stlibrd_t *brdp)
{
	cdkhdr_t __iomem *hdrp;
	cdkmem_t __iomem *memp;
	cdkasy_t __iomem *ap;
	unsigned long flags;
	stliport_t *portp;
	int portnr, nrdevs, i, rc = 0;
	u32 memoff;

	spin_lock_irqsave(&brd_lock, flags);
	EBRDENABLE(brdp);
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	nrdevs = hdrp->nrdevs;

#if 0
	printk("%s(%d): CDK version %d.%d.%d --> "
		"nrdevs=%d memp=%x hostp=%x slavep=%x\n",
		 __FILE__, __LINE__, readb(&hdrp->ver_release), readb(&hdrp->ver_modification),
		 readb(&hdrp->ver_fix), nrdevs, (int) readl(&hdrp->memp), readl(&hdrp->hostp),
		 readl(&hdrp->slavep));
#endif

	if (nrdevs < (brdp->nrports + 1)) {
		printk(KERN_ERR "STALLION: slave failed to allocate memory for "
				"all devices, devices=%d\n", nrdevs);
		brdp->nrports = nrdevs - 1;
	}
	brdp->nrdevs = nrdevs;
	brdp->hostoffset = hdrp->hostp - CDK_CDKADDR;
	brdp->slaveoffset = hdrp->slavep - CDK_CDKADDR;
	brdp->bitsize = (nrdevs + 7) / 8;
	memoff = readl(&hdrp->memp);
	if (memoff > brdp->memsize) {
		printk(KERN_ERR "STALLION: corrupted shared memory region?\n");
		rc = -EIO;
		goto stli_donestartup;
	}
	memp = (cdkmem_t __iomem *) EBRDGETMEMPTR(brdp, memoff);
	if (readw(&memp->dtype) != TYP_ASYNCTRL) {
		printk(KERN_ERR "STALLION: no slave control device found\n");
		goto stli_donestartup;
	}
	memp++;

/*
 *	Cycle through memory allocation of each port. We are guaranteed to
 *	have all ports inside the first page of slave window, so no need to
 *	change pages while reading memory map.
 */
	for (i = 1, portnr = 0; (i < nrdevs); i++, portnr++, memp++) {
		if (readw(&memp->dtype) != TYP_ASYNC)
			break;
		portp = brdp->ports[portnr];
		if (portp == NULL)
			break;
		portp->devnr = i;
		portp->addr = readl(&memp->offset);
		portp->reqbit = (unsigned char) (0x1 << (i * 8 / nrdevs));
		portp->portidx = (unsigned char) (i / 8);
		portp->portbit = (unsigned char) (0x1 << (i % 8));
	}

	writeb(0xff, &hdrp->slavereq);

/*
 *	For each port setup a local copy of the RX and TX buffer offsets
 *	and sizes. We do this separate from the above, because we need to
 *	move the shared memory page...
 */
	for (i = 1, portnr = 0; (i < nrdevs); i++, portnr++) {
		portp = brdp->ports[portnr];
		if (portp == NULL)
			break;
		if (portp->addr == 0)
			break;
		ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
		if (ap != NULL) {
			portp->rxsize = readw(&ap->rxq.size);
			portp->txsize = readw(&ap->txq.size);
			portp->rxoffset = readl(&ap->rxq.offset);
			portp->txoffset = readl(&ap->txq.offset);
		}
	}

stli_donestartup:
	EBRDDISABLE(brdp);
	spin_unlock_irqrestore(&brd_lock, flags);

	if (rc == 0)
		brdp->state |= BST_STARTED;

	if (! stli_timeron) {
		stli_timeron++;
		stli_timerlist.expires = STLI_TIMEOUT;
		add_timer(&stli_timerlist);
	}

	return rc;
}

/*****************************************************************************/

/*
 *	Probe and initialize the specified board.
 */

static int __init stli_brdinit(stlibrd_t *brdp)
{
	stli_brds[brdp->brdnr] = brdp;

	switch (brdp->brdtype) {
	case BRD_ECP:
	case BRD_ECPE:
	case BRD_ECPMC:
	case BRD_ECPPCI:
		stli_initecp(brdp);
		break;
	case BRD_ONBOARD:
	case BRD_ONBOARDE:
	case BRD_ONBOARD2:
	case BRD_ONBOARD32:
	case BRD_ONBOARD2_32:
	case BRD_ONBOARDRS:
	case BRD_BRUMBY4:
	case BRD_BRUMBY8:
	case BRD_BRUMBY16:
	case BRD_STALLION:
		stli_initonb(brdp);
		break;
	case BRD_EASYIO:
	case BRD_ECH:
	case BRD_ECHMC:
	case BRD_ECHPCI:
		printk(KERN_ERR "STALLION: %s board type not supported in "
				"this driver\n", stli_brdnames[brdp->brdtype]);
		return -ENODEV;
	default:
		printk(KERN_ERR "STALLION: board=%d is unknown board "
				"type=%d\n", brdp->brdnr, brdp->brdtype);
		return -ENODEV;
	}

	if ((brdp->state & BST_FOUND) == 0) {
		printk(KERN_ERR "STALLION: %s board not found, board=%d "
				"io=%x mem=%x\n",
			stli_brdnames[brdp->brdtype], brdp->brdnr,
			brdp->iobase, (int) brdp->memaddr);
		return -ENODEV;
	}

	stli_initports(brdp);
	printk(KERN_INFO "STALLION: %s found, board=%d io=%x mem=%x "
		"nrpanels=%d nrports=%d\n", stli_brdnames[brdp->brdtype],
		brdp->brdnr, brdp->iobase, (int) brdp->memaddr,
		brdp->nrpanels, brdp->nrports);
	return 0;
}

/*****************************************************************************/

/*
 *	Probe around trying to find where the EISA boards shared memory
 *	might be. This is a bit if hack, but it is the best we can do.
 */

static int stli_eisamemprobe(stlibrd_t *brdp)
{
	cdkecpsig_t	ecpsig, __iomem *ecpsigp;
	cdkonbsig_t	onbsig, __iomem *onbsigp;
	int		i, foundit;

/*
 *	First up we reset the board, to get it into a known state. There
 *	is only 2 board types here we need to worry about. Don;t use the
 *	standard board init routine here, it programs up the shared
 *	memory address, and we don't know it yet...
 */
	if (brdp->brdtype == BRD_ECPE) {
		outb(0x1, (brdp->iobase + ECP_EIBRDENAB));
		outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
		udelay(10);
		outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
		udelay(500);
		stli_ecpeienable(brdp);
	} else if (brdp->brdtype == BRD_ONBOARDE) {
		outb(0x1, (brdp->iobase + ONB_EIBRDENAB));
		outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
		udelay(10);
		outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
		mdelay(100);
		outb(0x1, brdp->iobase);
		mdelay(1);
		stli_onbeenable(brdp);
	} else {
		return -ENODEV;
	}

	foundit = 0;
	brdp->memsize = ECP_MEMSIZE;

/*
 *	Board shared memory is enabled, so now we have a poke around and
 *	see if we can find it.
 */
	for (i = 0; (i < stli_eisamempsize); i++) {
		brdp->memaddr = stli_eisamemprobeaddrs[i];
		brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
		if (brdp->membase == NULL)
			continue;

		if (brdp->brdtype == BRD_ECPE) {
			ecpsigp = (cdkecpsig_t __iomem *) stli_ecpeigetmemptr(brdp,
				CDK_SIGADDR, __LINE__);
			memcpy_fromio(&ecpsig, ecpsigp, sizeof(cdkecpsig_t));
			if (ecpsig.magic == cpu_to_le32(ECP_MAGIC))
				foundit = 1;
		} else {
			onbsigp = (cdkonbsig_t __iomem *) stli_onbegetmemptr(brdp,
				CDK_SIGADDR, __LINE__);
			memcpy_fromio(&onbsig, onbsigp, sizeof(cdkonbsig_t));
			if ((onbsig.magic0 == cpu_to_le16(ONB_MAGIC0)) &&
			    (onbsig.magic1 == cpu_to_le16(ONB_MAGIC1)) &&
			    (onbsig.magic2 == cpu_to_le16(ONB_MAGIC2)) &&
			    (onbsig.magic3 == cpu_to_le16(ONB_MAGIC3)))
				foundit = 1;
		}

		iounmap(brdp->membase);
		if (foundit)
			break;
	}

/*
 *	Regardless of whether we found the shared memory or not we must
 *	disable the region. After that return success or failure.
 */
	if (brdp->brdtype == BRD_ECPE)
		stli_ecpeidisable(brdp);
	else
		stli_onbedisable(brdp);

	if (! foundit) {
		brdp->memaddr = 0;
		brdp->membase = NULL;
		printk(KERN_ERR "STALLION: failed to probe shared memory "
				"region for %s in EISA slot=%d\n",
			stli_brdnames[brdp->brdtype], (brdp->iobase >> 12));
		return -ENODEV;
	}
	return 0;
}

static int stli_getbrdnr(void)
{
	int i;

	for (i = 0; i < STL_MAXBRDS; i++) {
		if (!stli_brds[i]) {
			if (i >= stli_nrbrds)
				stli_nrbrds = i + 1;
			return i;
		}
	}
	return -1;
}

/*****************************************************************************/

/*
 *	Probe around and try to find any EISA boards in system. The biggest
 *	problem here is finding out what memory address is associated with
 *	an EISA board after it is found. The registers of the ECPE and
 *	ONboardE are not readable - so we can't read them from there. We
 *	don't have access to the EISA CMOS (or EISA BIOS) so we don't
 *	actually have any way to find out the real value. The best we can
 *	do is go probing around in the usual places hoping we can find it.
 */

static int stli_findeisabrds(void)
{
	stlibrd_t *brdp;
	unsigned int iobase, eid;
	int i;

/*
 *	Firstly check if this is an EISA system.  If this is not an EISA system then
 *	don't bother going any further!
 */
	if (EISA_bus)
		return 0;

/*
 *	Looks like an EISA system, so go searching for EISA boards.
 */
	for (iobase = 0x1000; (iobase <= 0xc000); iobase += 0x1000) {
		outb(0xff, (iobase + 0xc80));
		eid = inb(iobase + 0xc80);
		eid |= inb(iobase + 0xc81) << 8;
		if (eid != STL_EISAID)
			continue;

/*
 *		We have found a board. Need to check if this board was
 *		statically configured already (just in case!).
 */
		for (i = 0; (i < STL_MAXBRDS); i++) {
			brdp = stli_brds[i];
			if (brdp == NULL)
				continue;
			if (brdp->iobase == iobase)
				break;
		}
		if (i < STL_MAXBRDS)
			continue;

/*
 *		We have found a Stallion board and it is not configured already.
 *		Allocate a board structure and initialize it.
 */
		if ((brdp = stli_allocbrd()) == NULL)
			return -ENOMEM;
		if ((brdp->brdnr = stli_getbrdnr()) < 0)
			return -ENOMEM;
		eid = inb(iobase + 0xc82);
		if (eid == ECP_EISAID)
			brdp->brdtype = BRD_ECPE;
		else if (eid == ONB_EISAID)
			brdp->brdtype = BRD_ONBOARDE;
		else
			brdp->brdtype = BRD_UNKNOWN;
		brdp->iobase = iobase;
		outb(0x1, (iobase + 0xc84));
		if (stli_eisamemprobe(brdp))
			outb(0, (iobase + 0xc84));
		stli_brdinit(brdp);
	}

	return 0;
}

/*****************************************************************************/

/*
 *	Find the next available board number that is free.
 */

/*****************************************************************************/

#ifdef	CONFIG_PCI

/*
 *	We have a Stallion board. Allocate a board structure and
 *	initialize it. Read its IO and MEMORY resources from PCI
 *	configuration space.
 */

static int stli_initpcibrd(int brdtype, struct pci_dev *devp)
{
	stlibrd_t *brdp;

	if (pci_enable_device(devp))
		return -EIO;
	if ((brdp = stli_allocbrd()) == NULL)
		return -ENOMEM;
	if ((brdp->brdnr = stli_getbrdnr()) < 0) {
		printk(KERN_INFO "STALLION: too many boards found, "
			"maximum supported %d\n", STL_MAXBRDS);
		return 0;
	}
	brdp->brdtype = brdtype;
/*
 *	We have all resources from the board, so lets setup the actual
 *	board structure now.
 */
	brdp->iobase = pci_resource_start(devp, 3);
	brdp->memaddr = pci_resource_start(devp, 2);
	stli_brdinit(brdp);

	return 0;
}

/*****************************************************************************/

/*
 *	Find all Stallion PCI boards that might be installed. Initialize each
 *	one as it is found.
 */

static int stli_findpcibrds(void)
{
	struct pci_dev *dev = NULL;

	while ((dev = pci_get_device(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECRA, dev))) {
		stli_initpcibrd(BRD_ECPPCI, dev);
	}
	return 0;
}

#endif

/*****************************************************************************/

/*
 *	Allocate a new board structure. Fill out the basic info in it.
 */

static stlibrd_t *stli_allocbrd(void)
{
	stlibrd_t *brdp;

	brdp = kzalloc(sizeof(stlibrd_t), GFP_KERNEL);
	if (!brdp) {
		printk(KERN_ERR "STALLION: failed to allocate memory "
				"(size=%Zd)\n", sizeof(stlibrd_t));
		return NULL;
	}
	brdp->magic = STLI_BOARDMAGIC;
	return brdp;
}

/*****************************************************************************/

/*
 *	Scan through all the boards in the configuration and see what we
 *	can find.
 */

static int stli_initbrds(void)
{
	stlibrd_t *brdp, *nxtbrdp;
	stlconf_t *confp;
	int i, j;

	if (stli_nrbrds > STL_MAXBRDS) {
		printk(KERN_INFO "STALLION: too many boards in configuration "
			"table, truncating to %d\n", STL_MAXBRDS);
		stli_nrbrds = STL_MAXBRDS;
	}

/*
 *	Firstly scan the list of static boards configured. Allocate
 *	resources and initialize the boards as found. If this is a
 *	module then let the module args override static configuration.
 */
	for (i = 0; (i < stli_nrbrds); i++) {
		confp = &stli_brdconf[i];
		stli_parsebrd(confp, stli_brdsp[i]);
		if ((brdp = stli_allocbrd()) == NULL)
			return -ENOMEM;
		brdp->brdnr = i;
		brdp->brdtype = confp->brdtype;
		brdp->iobase = confp->ioaddr1;
		brdp->memaddr = confp->memaddr;
		stli_brdinit(brdp);
	}

/*
 *	Static configuration table done, so now use dynamic methods to
 *	see if any more boards should be configured.
 */
	stli_argbrds();
	if (STLI_EISAPROBE)
		stli_findeisabrds();
#ifdef CONFIG_PCI
	stli_findpcibrds();
#endif

/*
 *	All found boards are initialized. Now for a little optimization, if
 *	no boards are sharing the "shared memory" regions then we can just
 *	leave them all enabled. This is in fact the usual case.
 */
	stli_shared = 0;
	if (stli_nrbrds > 1) {
		for (i = 0; (i < stli_nrbrds); i++) {
			brdp = stli_brds[i];
			if (brdp == NULL)
				continue;
			for (j = i + 1; (j < stli_nrbrds); j++) {
				nxtbrdp = stli_brds[j];
				if (nxtbrdp == NULL)
					continue;
				if ((brdp->membase >= nxtbrdp->membase) &&
				    (brdp->membase <= (nxtbrdp->membase +
				    nxtbrdp->memsize - 1))) {
					stli_shared++;
					break;
				}
			}
		}
	}

	if (stli_shared == 0) {
		for (i = 0; (i < stli_nrbrds); i++) {
			brdp = stli_brds[i];
			if (brdp == NULL)
				continue;
			if (brdp->state & BST_FOUND) {
				EBRDENABLE(brdp);
				brdp->enable = NULL;
				brdp->disable = NULL;
			}
		}
	}

	return 0;
}

/*****************************************************************************/

/*
 *	Code to handle an "staliomem" read operation. This device is the 
 *	contents of the board shared memory. It is used for down loading
 *	the slave image (and debugging :-)
 */

static ssize_t stli_memread(struct file *fp, char __user *buf, size_t count, loff_t *offp)
{
	unsigned long flags;
	void *memptr;
	stlibrd_t *brdp;
	int brdnr, size, n;
	void *p;
	loff_t off = *offp;

	brdnr = iminor(fp->f_dentry->d_inode);
	if (brdnr >= stli_nrbrds)
		return -ENODEV;
	brdp = stli_brds[brdnr];
	if (brdp == NULL)
		return -ENODEV;
	if (brdp->state == 0)
		return -ENODEV;
	if (off >= brdp->memsize || off + count < off)
		return 0;

	size = MIN(count, (brdp->memsize - off));

	/*
	 *	Copy the data a page at a time
	 */

	p = (void *)__get_free_page(GFP_KERNEL);
	if(p == NULL)
		return -ENOMEM;

	while (size > 0) {
		spin_lock_irqsave(&brd_lock, flags);
		EBRDENABLE(brdp);
		memptr = (void *) EBRDGETMEMPTR(brdp, off);
		n = MIN(size, (brdp->pagesize - (((unsigned long) off) % brdp->pagesize)));
		n = MIN(n, PAGE_SIZE);
		memcpy_fromio(p, memptr, n);
		EBRDDISABLE(brdp);
		spin_unlock_irqrestore(&brd_lock, flags);
		if (copy_to_user(buf, p, n)) {
			count = -EFAULT;
			goto out;
		}
		off += n;
		buf += n;
		size -= n;
	}
out:
	*offp = off;
	free_page((unsigned long)p);
	return count;
}

/*****************************************************************************/

/*
 *	Code to handle an "staliomem" write operation. This device is the 
 *	contents of the board shared memory. It is used for down loading
 *	the slave image (and debugging :-)
 *
 *	FIXME: copy under lock
 */

static ssize_t stli_memwrite(struct file *fp, const char __user *buf, size_t count, loff_t *offp)
{
	unsigned long flags;
	void *memptr;
	stlibrd_t *brdp;
	char __user *chbuf;
	int brdnr, size, n;
	void *p;
	loff_t off = *offp;

	brdnr = iminor(fp->f_dentry->d_inode);

	if (brdnr >= stli_nrbrds)
		return -ENODEV;
	brdp = stli_brds[brdnr];
	if (brdp == NULL)
		return -ENODEV;
	if (brdp->state == 0)
		return -ENODEV;
	if (off >= brdp->memsize || off + count < off)
		return 0;

	chbuf = (char __user *) buf;
	size = MIN(count, (brdp->memsize - off));

	/*
	 *	Copy the data a page at a time
	 */

	p = (void *)__get_free_page(GFP_KERNEL);
	if(p == NULL)
		return -ENOMEM;

	while (size > 0) {
		n = MIN(size, (brdp->pagesize - (((unsigned long) off) % brdp->pagesize)));
		n = MIN(n, PAGE_SIZE);
		if (copy_from_user(p, chbuf, n)) {
			if (count == 0)
				count = -EFAULT;
			goto out;
		}
		spin_lock_irqsave(&brd_lock, flags);
		EBRDENABLE(brdp);
		memptr = (void *) EBRDGETMEMPTR(brdp, off);
		memcpy_toio(memptr, p, n);
		EBRDDISABLE(brdp);
		spin_unlock_irqrestore(&brd_lock, flags);
		off += n;
		chbuf += n;
		size -= n;
	}
out:
	free_page((unsigned long) p);
	*offp = off;
	return count;
}

/*****************************************************************************/

/*
 *	Return the board stats structure to user app.
 */

static int stli_getbrdstats(combrd_t __user *bp)
{
	stlibrd_t *brdp;
	int i;

	if (copy_from_user(&stli_brdstats, bp, sizeof(combrd_t)))
		return -EFAULT;
	if (stli_brdstats.brd >= STL_MAXBRDS)
		return -ENODEV;
	brdp = stli_brds[stli_brdstats.brd];
	if (brdp == NULL)
		return -ENODEV;

	memset(&stli_brdstats, 0, sizeof(combrd_t));
	stli_brdstats.brd = brdp->brdnr;
	stli_brdstats.type = brdp->brdtype;
	stli_brdstats.hwid = 0;
	stli_brdstats.state = brdp->state;
	stli_brdstats.ioaddr = brdp->iobase;
	stli_brdstats.memaddr = brdp->memaddr;
	stli_brdstats.nrpanels = brdp->nrpanels;
	stli_brdstats.nrports = brdp->nrports;
	for (i = 0; (i < brdp->nrpanels); i++) {
		stli_brdstats.panels[i].panel = i;
		stli_brdstats.panels[i].hwid = brdp->panelids[i];
		stli_brdstats.panels[i].nrports = brdp->panels[i];
	}

	if (copy_to_user(bp, &stli_brdstats, sizeof(combrd_t)))
		return -EFAULT;
	return 0;
}

/*****************************************************************************/

/*
 *	Resolve the referenced port number into a port struct pointer.
 */

static stliport_t *stli_getport(int brdnr, int panelnr, int portnr)
{
	stlibrd_t *brdp;
	int i;

	if (brdnr < 0 || brdnr >= STL_MAXBRDS)
		return NULL;
	brdp = stli_brds[brdnr];
	if (brdp == NULL)
		return NULL;
	for (i = 0; (i < panelnr); i++)
		portnr += brdp->panels[i];
	if ((portnr < 0) || (portnr >= brdp->nrports))
		return NULL;
	return brdp->ports[portnr];
}

/*****************************************************************************/

/*
 *	Return the port stats structure to user app. A NULL port struct
 *	pointer passed in means that we need to find out from the app
 *	what port to get stats for (used through board control device).
 */

static int stli_portcmdstats(stliport_t *portp)
{
	unsigned long	flags;
	stlibrd_t	*brdp;
	int		rc;

	memset(&stli_comstats, 0, sizeof(comstats_t));

	if (portp == NULL)
		return -ENODEV;
	brdp = stli_brds[portp->brdnr];
	if (brdp == NULL)
		return -ENODEV;

	if (brdp->state & BST_STARTED) {
		if ((rc = stli_cmdwait(brdp, portp, A_GETSTATS,
		    &stli_cdkstats, sizeof(asystats_t), 1)) < 0)
			return rc;
	} else {
		memset(&stli_cdkstats, 0, sizeof(asystats_t));
	}

	stli_comstats.brd = portp->brdnr;
	stli_comstats.panel = portp->panelnr;
	stli_comstats.port = portp->portnr;
	stli_comstats.state = portp->state;
	stli_comstats.flags = portp->flags;

	spin_lock_irqsave(&brd_lock, flags);
	if (portp->tty != NULL) {
		if (portp->tty->driver_data == portp) {
			stli_comstats.ttystate = portp->tty->flags;
			stli_comstats.rxbuffered = -1;
			if (portp->tty->termios != NULL) {
				stli_comstats.cflags = portp->tty->termios->c_cflag;
				stli_comstats.iflags = portp->tty->termios->c_iflag;
				stli_comstats.oflags = portp->tty->termios->c_oflag;
				stli_comstats.lflags = portp->tty->termios->c_lflag;
			}
		}
	}
	spin_unlock_irqrestore(&brd_lock, flags);

	stli_comstats.txtotal = stli_cdkstats.txchars;
	stli_comstats.rxtotal = stli_cdkstats.rxchars + stli_cdkstats.ringover;
	stli_comstats.txbuffered = stli_cdkstats.txringq;
	stli_comstats.rxbuffered += stli_cdkstats.rxringq;
	stli_comstats.rxoverrun = stli_cdkstats.overruns;
	stli_comstats.rxparity = stli_cdkstats.parity;
	stli_comstats.rxframing = stli_cdkstats.framing;
	stli_comstats.rxlost = stli_cdkstats.ringover;
	stli_comstats.rxbreaks = stli_cdkstats.rxbreaks;
	stli_comstats.txbreaks = stli_cdkstats.txbreaks;
	stli_comstats.txxon = stli_cdkstats.txstart;
	stli_comstats.txxoff = stli_cdkstats.txstop;
	stli_comstats.rxxon = stli_cdkstats.rxstart;
	stli_comstats.rxxoff = stli_cdkstats.rxstop;
	stli_comstats.rxrtsoff = stli_cdkstats.rtscnt / 2;
	stli_comstats.rxrtson = stli_cdkstats.rtscnt - stli_comstats.rxrtsoff;
	stli_comstats.modem = stli_cdkstats.dcdcnt;
	stli_comstats.hwid = stli_cdkstats.hwid;
	stli_comstats.signals = stli_mktiocm(stli_cdkstats.signals);

	return 0;
}

/*****************************************************************************/

/*
 *	Return the port stats structure to user app. A NULL port struct
 *	pointer passed in means that we need to find out from the app
 *	what port to get stats for (used through board control device).
 */

static int stli_getportstats(stliport_t *portp, comstats_t __user *cp)
{
	stlibrd_t *brdp;
	int rc;

	if (!portp) {
		if (copy_from_user(&stli_comstats, cp, sizeof(comstats_t)))
			return -EFAULT;
		portp = stli_getport(stli_comstats.brd, stli_comstats.panel,
			stli_comstats.port);
		if (!portp)
			return -ENODEV;
	}

	brdp = stli_brds[portp->brdnr];
	if (!brdp)
		return -ENODEV;

	if ((rc = stli_portcmdstats(portp)) < 0)
		return rc;

	return copy_to_user(cp, &stli_comstats, sizeof(comstats_t)) ?
			-EFAULT : 0;
}

/*****************************************************************************/

/*
 *	Clear the port stats structure. We also return it zeroed out...
 */

static int stli_clrportstats(stliport_t *portp, comstats_t __user *cp)
{
	stlibrd_t *brdp;
	int rc;

	if (!portp) {
		if (copy_from_user(&stli_comstats, cp, sizeof(comstats_t)))
			return -EFAULT;
		portp = stli_getport(stli_comstats.brd, stli_comstats.panel,
			stli_comstats.port);
		if (!portp)
			return -ENODEV;
	}

	brdp = stli_brds[portp->brdnr];
	if (!brdp)
		return -ENODEV;

	if (brdp->state & BST_STARTED) {
		if ((rc = stli_cmdwait(brdp, portp, A_CLEARSTATS, NULL, 0, 0)) < 0)
			return rc;
	}

	memset(&stli_comstats, 0, sizeof(comstats_t));
	stli_comstats.brd = portp->brdnr;
	stli_comstats.panel = portp->panelnr;
	stli_comstats.port = portp->portnr;

	if (copy_to_user(cp, &stli_comstats, sizeof(comstats_t)))
		return -EFAULT;
	return 0;
}

/*****************************************************************************/

/*
 *	Return the entire driver ports structure to a user app.
 */

static int stli_getportstruct(stliport_t __user *arg)
{
	stliport_t *portp;

	if (copy_from_user(&stli_dummyport, arg, sizeof(stliport_t)))
		return -EFAULT;
	portp = stli_getport(stli_dummyport.brdnr, stli_dummyport.panelnr,
		 stli_dummyport.portnr);
	if (!portp)
		return -ENODEV;
	if (copy_to_user(arg, portp, sizeof(stliport_t)))
		return -EFAULT;
	return 0;
}

/*****************************************************************************/

/*
 *	Return the entire driver board structure to a user app.
 */

static int stli_getbrdstruct(stlibrd_t __user *arg)
{
	stlibrd_t *brdp;

	if (copy_from_user(&stli_dummybrd, arg, sizeof(stlibrd_t)))
		return -EFAULT;
	if ((stli_dummybrd.brdnr < 0) || (stli_dummybrd.brdnr >= STL_MAXBRDS))
		return -ENODEV;
	brdp = stli_brds[stli_dummybrd.brdnr];
	if (!brdp)
		return -ENODEV;
	if (copy_to_user(arg, brdp, sizeof(stlibrd_t)))
		return -EFAULT;
	return 0;
}

/*****************************************************************************/

/*
 *	The "staliomem" device is also required to do some special operations on
 *	the board. We need to be able to send an interrupt to the board,
 *	reset it, and start/stop it.
 */

static int stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
{
	stlibrd_t *brdp;
	int brdnr, rc, done;
	void __user *argp = (void __user *)arg;

/*
 *	First up handle the board independent ioctls.
 */
	done = 0;
	rc = 0;

	switch (cmd) {
	case COM_GETPORTSTATS:
		rc = stli_getportstats(NULL, argp);
		done++;
		break;
	case COM_CLRPORTSTATS:
		rc = stli_clrportstats(NULL, argp);
		done++;
		break;
	case COM_GETBRDSTATS:
		rc = stli_getbrdstats(argp);
		done++;
		break;
	case COM_READPORT:
		rc = stli_getportstruct(argp);
		done++;
		break;
	case COM_READBOARD:
		rc = stli_getbrdstruct(argp);
		done++;
		break;
	}

	if (done)
		return rc;

/*
 *	Now handle the board specific ioctls. These all depend on the
 *	minor number of the device they were called from.
 */
	brdnr = iminor(ip);
	if (brdnr >= STL_MAXBRDS)
		return -ENODEV;
	brdp = stli_brds[brdnr];
	if (!brdp)
		return -ENODEV;
	if (brdp->state == 0)
		return -ENODEV;

	switch (cmd) {
	case STL_BINTR:
		EBRDINTR(brdp);
		break;
	case STL_BSTART:
		rc = stli_startbrd(brdp);
		break;
	case STL_BSTOP:
		brdp->state &= ~BST_STARTED;
		break;
	case STL_BRESET:
		brdp->state &= ~BST_STARTED;
		EBRDRESET(brdp);
		if (stli_shared == 0) {
			if (brdp->reenable != NULL)
				(* brdp->reenable)(brdp);
		}
		break;
	default:
		rc = -ENOIOCTLCMD;
		break;
	}
	return rc;
}

static const struct tty_operations stli_ops = {
	.open = stli_open,
	.close = stli_close,
	.write = stli_write,
	.put_char = stli_putchar,
	.flush_chars = stli_flushchars,
	.write_room = stli_writeroom,
	.chars_in_buffer = stli_charsinbuffer,
	.ioctl = stli_ioctl,
	.set_termios = stli_settermios,
	.throttle = stli_throttle,
	.unthrottle = stli_unthrottle,
	.stop = stli_stop,
	.start = stli_start,
	.hangup = stli_hangup,
	.flush_buffer = stli_flushbuffer,
	.break_ctl = stli_breakctl,
	.wait_until_sent = stli_waituntilsent,
	.send_xchar = stli_sendxchar,
	.read_proc = stli_readproc,
	.tiocmget = stli_tiocmget,
	.tiocmset = stli_tiocmset,
};

/*****************************************************************************/

static int __init stli_init(void)
{
	int i;
	printk(KERN_INFO "%s: version %s\n", stli_drvtitle, stli_drvversion);

	spin_lock_init(&stli_lock);
	spin_lock_init(&brd_lock);

	stli_initbrds();

	stli_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
	if (!stli_serial)
		return -ENOMEM;

/*
 *	Allocate a temporary write buffer.
 */
	stli_txcookbuf = kmalloc(STLI_TXBUFSIZE, GFP_KERNEL);
	if (!stli_txcookbuf)
		printk(KERN_ERR "STALLION: failed to allocate memory "
				"(size=%d)\n", STLI_TXBUFSIZE);

/*
 *	Set up a character driver for the shared memory region. We need this
 *	to down load the slave code image. Also it is a useful debugging tool.
 */
	if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stli_fsiomem))
		printk(KERN_ERR "STALLION: failed to register serial memory "
				"device\n");

	istallion_class = class_create(THIS_MODULE, "staliomem");
	for (i = 0; i < 4; i++)
		class_device_create(istallion_class, NULL,
				MKDEV(STL_SIOMEMMAJOR, i),
				NULL, "staliomem%d", i);

/*
 *	Set up the tty driver structure and register us as a driver.
 */
	stli_serial->owner = THIS_MODULE;
	stli_serial->driver_name = stli_drvname;
	stli_serial->name = stli_serialname;
	stli_serial->major = STL_SERIALMAJOR;
	stli_serial->minor_start = 0;
	stli_serial->type = TTY_DRIVER_TYPE_SERIAL;
	stli_serial->subtype = SERIAL_TYPE_NORMAL;
	stli_serial->init_termios = stli_deftermios;
	stli_serial->flags = TTY_DRIVER_REAL_RAW;
	tty_set_operations(stli_serial, &stli_ops);

	if (tty_register_driver(stli_serial)) {
		put_tty_driver(stli_serial);
		printk(KERN_ERR "STALLION: failed to register serial driver\n");
		return -EBUSY;
	}
	return 0;
}

/*****************************************************************************/