aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/char/ip2/ip2main.c
blob: 5d2d5732d82fbb24c6f312a7606ef18efc2eb263 (plain) (blame)
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
/*
*
*   (c) 1999 by Computone Corporation
*
********************************************************************************
*
*   PACKAGE:     Linux tty Device Driver for IntelliPort family of multiport
*                serial I/O controllers.
*
*   DESCRIPTION: Mainline code for the device driver
*
*******************************************************************************/
// ToDo:
//
// Fix the immediate DSS_NOW problem.
// Work over the channel stats return logic in ip2_ipl_ioctl so they
//	make sense for all 256 possible channels and so the user space
//	utilities will compile and work properly.
//
// Done:
//
// 1.2.14	/\/\|=mhw=|\/\/
// Added bounds checking to ip2_ipl_ioctl to avoid potential terroristic acts.
// Changed the definition of ip2trace to be more consistent with kernel style
//	Thanks to Andreas Dilger <adilger@turbolabs.com> for these updates
//
// 1.2.13	/\/\|=mhw=|\/\/
// DEVFS: Renamed ttf/{n} to tts/F{n} and cuf/{n} to cua/F{n} to conform
//	to agreed devfs serial device naming convention.
//
// 1.2.12	/\/\|=mhw=|\/\/
// Cleaned up some remove queue cut and paste errors
//
// 1.2.11	/\/\|=mhw=|\/\/
// Clean up potential NULL pointer dereferences
// Clean up devfs registration
// Add kernel command line parsing for io and irq
//	Compile defaults for io and irq are now set in ip2.c not ip2.h!
// Reworked poll_only hack for explicit parameter setting
//	You must now EXPLICITLY set poll_only = 1 or set all irqs to 0
// Merged ip2_loadmain and old_ip2_init
// Converted all instances of interruptible_sleep_on into queue calls
//	Most of these had no race conditions but better to clean up now
//
// 1.2.10	/\/\|=mhw=|\/\/
// Fixed the bottom half interrupt handler and enabled USE_IQI
//	to split the interrupt handler into a formal top-half / bottom-half
// Fixed timing window on high speed processors that queued messages to
// 	the outbound mail fifo faster than the board could handle.
//
// 1.2.9
// Four box EX was barfing on >128k kmalloc, made structure smaller by
// reducing output buffer size
//
// 1.2.8
// Device file system support (MHW)
//
// 1.2.7 
// Fixed
// Reload of ip2 without unloading ip2main hangs system on cat of /proc/modules
//
// 1.2.6
//Fixes DCD problems
//	DCD was not reported when CLOCAL was set on call to TIOCMGET
//
//Enhancements:
//	TIOCMGET requests and waits for status return
//	No DSS interrupts enabled except for DCD when needed
//
// For internal use only
//
//#define IP2DEBUG_INIT
//#define IP2DEBUG_OPEN
//#define IP2DEBUG_WRITE
//#define IP2DEBUG_READ
//#define IP2DEBUG_IOCTL
//#define IP2DEBUG_IPL

//#define IP2DEBUG_TRACE
//#define DEBUG_FIFO

/************/
/* Includes */
/************/
#include <linux/config.h>

#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/devfs_fs_kernel.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/major.h>
#include <linux/wait.h>
#include <linux/device.h>

#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/termios.h>
#include <linux/tty_driver.h>
#include <linux/serial.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>

#include <linux/cdk.h>
#include <linux/comstats.h>
#include <linux/delay.h>
#include <linux/bitops.h>

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

#include <linux/vmalloc.h>
#include <linux/init.h>

#include <asm/uaccess.h>

#include "ip2types.h"
#include "ip2trace.h"
#include "ip2ioctl.h"
#include "ip2.h"
#include "i2ellis.h"
#include "i2lib.h"

/*****************
 * /proc/ip2mem  *
 *****************/

#include <linux/proc_fs.h>

static int ip2_read_procmem(char *, char **, off_t, int);
static int ip2_read_proc(char *, char **, off_t, int, int *, void * );

/********************/
/* Type Definitions */
/********************/

/*************/
/* Constants */
/*************/

/* String constants to identify ourselves */
static char *pcName    = "Computone IntelliPort Plus multiport driver";
static char *pcVersion = "1.2.14";

/* String constants for port names */
static char *pcDriver_name   = "ip2";
static char *pcIpl    		 = "ip2ipl";

/* Serial subtype definitions */
#define SERIAL_TYPE_NORMAL    1

// cheezy kludge or genius - you decide?
int ip2_loadmain(int *, int *, unsigned char *, int);
static unsigned char *Fip_firmware;
static int Fip_firmware_size;

/***********************/
/* Function Prototypes */
/***********************/

/* Global module entry functions */

/* Private (static) functions */
static int  ip2_open(PTTY, struct file *);
static void ip2_close(PTTY, struct file *);
static int  ip2_write(PTTY, const unsigned char *, int);
static void ip2_putchar(PTTY, unsigned char);
static void ip2_flush_chars(PTTY);
static int  ip2_write_room(PTTY);
static int  ip2_chars_in_buf(PTTY);
static void ip2_flush_buffer(PTTY);
static int  ip2_ioctl(PTTY, struct file *, UINT, ULONG);
static void ip2_set_termios(PTTY, struct termios *);
static void ip2_set_line_discipline(PTTY);
static void ip2_throttle(PTTY);
static void ip2_unthrottle(PTTY);
static void ip2_stop(PTTY);
static void ip2_start(PTTY);
static void ip2_hangup(PTTY);
static int  ip2_tiocmget(struct tty_struct *tty, struct file *file);
static int  ip2_tiocmset(struct tty_struct *tty, struct file *file,
			 unsigned int set, unsigned int clear);

static void set_irq(int, int);
static void ip2_interrupt_bh(i2eBordStrPtr pB);
static irqreturn_t ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs);
static void ip2_poll(unsigned long arg);
static inline void service_all_boards(void);
static void do_input(void *p);
static void do_status(void *p);

static void ip2_wait_until_sent(PTTY,int);

static void set_params (i2ChanStrPtr, struct termios *);
static int get_serial_info(i2ChanStrPtr, struct serial_struct __user *);
static int set_serial_info(i2ChanStrPtr, struct serial_struct __user *);

static ssize_t ip2_ipl_read(struct file *, char __user *, size_t, loff_t *);
static ssize_t ip2_ipl_write(struct file *, const char __user *, size_t, loff_t *);
static int ip2_ipl_ioctl(struct inode *, struct file *, UINT, ULONG);
static int ip2_ipl_open(struct inode *, struct file *);

static int DumpTraceBuffer(char __user *, int);
static int DumpFifoBuffer( char __user *, int);

static void ip2_init_board(int);
static unsigned short find_eisa_board(int);

/***************/
/* Static Data */
/***************/

static struct tty_driver *ip2_tty_driver;

/* Here, then is a table of board pointers which the interrupt routine should
 * scan through to determine who it must service.
 */
static unsigned short i2nBoards; // Number of boards here

static i2eBordStrPtr i2BoardPtrTable[IP2_MAX_BOARDS];

static i2ChanStrPtr  DevTable[IP2_MAX_PORTS];
//DevTableMem just used to save addresses for kfree
static void  *DevTableMem[IP2_MAX_BOARDS];

/* This is the driver descriptor for the ip2ipl device, which is used to
 * download the loadware to the boards.
 */
static struct file_operations ip2_ipl = {
	.owner		= THIS_MODULE,
	.read		= ip2_ipl_read,
	.write		= ip2_ipl_write,
	.ioctl		= ip2_ipl_ioctl,
	.open		= ip2_ipl_open,
}; 

static unsigned long irq_counter = 0;
static unsigned long bh_counter = 0;

// Use immediate queue to service interrupts
#define USE_IQI
//#define USE_IQ	// PCI&2.2 needs work

/* The timer_list entry for our poll routine. If interrupt operation is not
 * selected, the board is serviced periodically to see if anything needs doing.
 */
#define  POLL_TIMEOUT   (jiffies + 1)
static DEFINE_TIMER(PollTimer, ip2_poll, 0, 0);
static char  TimerOn;

#ifdef IP2DEBUG_TRACE
/* Trace (debug) buffer data */
#define TRACEMAX  1000
static unsigned long tracebuf[TRACEMAX];
static int tracestuff;
static int tracestrip;
static int tracewrap;
#endif

/**********/
/* Macros */
/**********/

#if defined(MODULE) && defined(IP2DEBUG_OPEN)
#define DBG_CNT(s) printk(KERN_DEBUG "(%s): [%x] refc=%d, ttyc=%d, modc=%x -> %s\n", \
		    tty->name,(pCh->flags),ip2_tty_driver->refcount, \
		    tty->count,/*GET_USE_COUNT(module)*/0,s)
#else
#define DBG_CNT(s)
#endif

/********/
/* Code */
/********/

#include "i2ellis.c"    /* Extremely low-level interface services */
#include "i2cmd.c"      /* Standard loadware command definitions */
#include "i2lib.c"      /* High level interface services */

/* Configuration area for modprobe */

MODULE_AUTHOR("Doug McNash");
MODULE_DESCRIPTION("Computone IntelliPort Plus Driver");

static int poll_only = 0;

static int Eisa_irq;
static int Eisa_slot;

static int iindx;
static char rirqs[IP2_MAX_BOARDS];
static int Valid_Irqs[] = { 3, 4, 5, 7, 10, 11, 12, 15, 0};

/* for sysfs class support */
static struct class *ip2_class;

// Some functions to keep track of what irq's we have

static int
is_valid_irq(int irq)
{
	int *i = Valid_Irqs;
	
	while ((*i != 0) && (*i != irq)) {
		i++;
	}
	return (*i);
}

static void
mark_requested_irq( char irq )
{
	rirqs[iindx++] = irq;
}

#ifdef MODULE
static int
clear_requested_irq( char irq )
{
	int i;
	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
		if (rirqs[i] == irq) {
			rirqs[i] = 0;
			return 1;
		}
	}
	return 0;
}
#endif

static int
have_requested_irq( char irq )
{
	// array init to zeros so 0 irq will not be requested as a side effect
	int i;
	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
		if (rirqs[i] == irq)
			return 1;
	}
	return 0;
}

/******************************************************************************/
/* Function:   init_module()                                                  */
/* Parameters: None                                                           */
/* Returns:    Success (0)                                                    */
/*                                                                            */
/* Description:                                                               */
/* This is a required entry point for an installable module. It simply calls  */
/* the driver initialisation function and returns what it returns.            */
/******************************************************************************/
#ifdef MODULE
int
init_module(void)
{
#ifdef IP2DEBUG_INIT
	printk (KERN_DEBUG "Loading module ...\n" );
#endif
    return 0;
}
#endif /* MODULE */

/******************************************************************************/
/* Function:   cleanup_module()                                               */
/* Parameters: None                                                           */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/* This is a required entry point for an installable module. It has to return */
/* the device and the driver to a passive state. It should not be necessary   */
/* to reset the board fully, especially as the loadware is downloaded         */
/* externally rather than in the driver. We just want to disable the board    */
/* and clear the loadware to a reset state. To allow this there has to be a   */
/* way to detect whether the board has the loadware running at init time to   */
/* handle subsequent installations of the driver. All memory allocated by the */
/* driver should be returned since it may be unloaded from memory.            */
/******************************************************************************/
#ifdef MODULE
void
cleanup_module(void)
{
	int err;
	int i;

#ifdef IP2DEBUG_INIT
	printk (KERN_DEBUG "Unloading %s: version %s\n", pcName, pcVersion );
#endif
	/* Stop poll timer if we had one. */
	if ( TimerOn ) {
		del_timer ( &PollTimer );
		TimerOn = 0;
	}

	/* Reset the boards we have. */
	for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
		if ( i2BoardPtrTable[i] ) {
			iiReset( i2BoardPtrTable[i] );
		}
	}

	/* The following is done at most once, if any boards were installed. */
	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
		if ( i2BoardPtrTable[i] ) {
			iiResetDelay( i2BoardPtrTable[i] );
			/* free io addresses and Tibet */
			release_region( ip2config.addr[i], 8 );
			class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i));
			class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i + 1));
		}
		/* Disable and remove interrupt handler. */
		if ( (ip2config.irq[i] > 0) && have_requested_irq(ip2config.irq[i]) ) {	
			free_irq ( ip2config.irq[i], (void *)&pcName);
			clear_requested_irq( ip2config.irq[i]);
		}
	}
	class_destroy(ip2_class);
	if ( ( err = tty_unregister_driver ( ip2_tty_driver ) ) ) {
		printk(KERN_ERR "IP2: failed to unregister tty driver (%d)\n", err);
	}
	put_tty_driver(ip2_tty_driver);
	if ( ( err = unregister_chrdev ( IP2_IPL_MAJOR, pcIpl ) ) ) {
		printk(KERN_ERR "IP2: failed to unregister IPL driver (%d)\n", err);
	}
	remove_proc_entry("ip2mem", &proc_root);

	// free memory
	for (i = 0; i < IP2_MAX_BOARDS; i++) {
		void *pB;
#ifdef CONFIG_PCI
		if (ip2config.type[i] == PCI && ip2config.pci_dev[i]) {
			pci_disable_device(ip2config.pci_dev[i]);
			ip2config.pci_dev[i] = NULL;
		}
#endif
		if ((pB = i2BoardPtrTable[i]) != 0 ) {
			kfree ( pB );
			i2BoardPtrTable[i] = NULL;
		}
		if ((DevTableMem[i]) != NULL ) {
			kfree ( DevTableMem[i]  );
			DevTableMem[i] = NULL;
		}
	}

	/* Cleanup the iiEllis subsystem. */
	iiEllisCleanup();
#ifdef IP2DEBUG_INIT
	printk (KERN_DEBUG "IP2 Unloaded\n" );
#endif
}
#endif /* MODULE */

static struct tty_operations ip2_ops = {
	.open            = ip2_open,
	.close           = ip2_close,
	.write           = ip2_write,
	.put_char        = ip2_putchar,
	.flush_chars     = ip2_flush_chars,
	.write_room      = ip2_write_room,
	.chars_in_buffer = ip2_chars_in_buf,
	.flush_buffer    = ip2_flush_buffer,
	.ioctl           = ip2_ioctl,
	.throttle        = ip2_throttle,
	.unthrottle      = ip2_unthrottle,
	.set_termios     = ip2_set_termios,
	.set_ldisc       = ip2_set_line_discipline,
	.stop            = ip2_stop,
	.start           = ip2_start,
	.hangup          = ip2_hangup,
	.read_proc       = ip2_read_proc,
	.tiocmget	 = ip2_tiocmget,
	.tiocmset	 = ip2_tiocmset,
};

/******************************************************************************/
/* Function:   ip2_loadmain()                                                 */
/* Parameters: irq, io from command line of insmod et. al.                    */
/*		pointer to fip firmware and firmware size for boards	      */
/* Returns:    Success (0)                                                    */
/*                                                                            */
/* Description:                                                               */
/* This was the required entry point for all drivers (now in ip2.c)           */
/* It performs all                                                            */
/* initialisation of the devices and driver structures, and registers itself  */
/* with the relevant kernel modules.                                          */
/******************************************************************************/
/* SA_INTERRUPT- if set blocks all interrupts else only this line */
/* SA_SHIRQ    - for shared irq PCI or maybe EISA only */
/* SA_RANDOM   - can be source for cert. random number generators */
#define IP2_SA_FLAGS	0

int
ip2_loadmain(int *iop, int *irqp, unsigned char *firmware, int firmsize) 
{
	int i, j, box;
	int err = 0;
	int status = 0;
	static int loaded;
	i2eBordStrPtr pB = NULL;
	int rc = -1;

	ip2trace (ITRC_NO_PORT, ITRC_INIT, ITRC_ENTER, 0 );

	/* process command line arguments to modprobe or
		insmod i.e. iop & irqp */
	/* irqp and iop should ALWAYS be specified now...  But we check
		them individually just to be sure, anyways... */
	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
		if (iop) {
			ip2config.addr[i] = iop[i];
			if (irqp) {
				if( irqp[i] >= 0 ) {
					ip2config.irq[i] = irqp[i];
				} else {
					ip2config.irq[i] = 0;
				}
	// This is a little bit of a hack.  If poll_only=1 on command
	// line back in ip2.c OR all IRQs on all specified boards are
	// explicitly set to 0, then drop to poll only mode and override
	// PCI or EISA interrupts.  This superceeds the old hack of
	// triggering if all interrupts were zero (like da default).
	// Still a hack but less prone to random acts of terrorism.
	//
	// What we really should do, now that the IRQ default is set
	// to -1, is to use 0 as a hard coded, do not probe.
	//
	//	/\/\|=mhw=|\/\/
				poll_only |= irqp[i];
			}
		}
	}
	poll_only = !poll_only;

	Fip_firmware = firmware;
	Fip_firmware_size = firmsize;

	/* Announce our presence */
	printk( KERN_INFO "%s version %s\n", pcName, pcVersion );

	// ip2 can be unloaded and reloaded for no good reason
	// we can't let that happen here or bad things happen
	// second load hoses board but not system - fixme later
	if (loaded) {
		printk( KERN_INFO "Still loaded\n" );
		return 0;
	}
	loaded++;

	ip2_tty_driver = alloc_tty_driver(IP2_MAX_PORTS);
	if (!ip2_tty_driver)
		return -ENOMEM;

	/* Initialise the iiEllis subsystem. */
	iiEllisInit();

	/* Initialize arrays. */
	memset( i2BoardPtrTable, 0, sizeof i2BoardPtrTable );
	memset( DevTable, 0, sizeof DevTable );

	/* Initialise all the boards we can find (up to the maximum). */
	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
		switch ( ip2config.addr[i] ) { 
		case 0:	/* skip this slot even if card is present */
			break;
		default: /* ISA */
		   /* ISA address must be specified */
			if ( (ip2config.addr[i] < 0x100) || (ip2config.addr[i] > 0x3f8) ) {
				printk ( KERN_ERR "IP2: Bad ISA board %d address %x\n",
							 i, ip2config.addr[i] );
				ip2config.addr[i] = 0;
			} else {
				ip2config.type[i] = ISA;

				/* Check for valid irq argument, set for polling if invalid */
				if (ip2config.irq[i] && !is_valid_irq(ip2config.irq[i])) {
					printk(KERN_ERR "IP2: Bad IRQ(%d) specified\n",ip2config.irq[i]);
					ip2config.irq[i] = 0;// 0 is polling and is valid in that sense
				}
			}
			break;
		case PCI:
#ifdef CONFIG_PCI
			{
				struct pci_dev *pci_dev_i = NULL;
				pci_dev_i = pci_find_device(PCI_VENDOR_ID_COMPUTONE,
							  PCI_DEVICE_ID_COMPUTONE_IP2EX, pci_dev_i);
				if (pci_dev_i != NULL) {
					unsigned int addr;

					if (pci_enable_device(pci_dev_i)) {
						printk( KERN_ERR "IP2: can't enable PCI device at %s\n",
							pci_name(pci_dev_i));
						break;
					}
					ip2config.type[i] = PCI;
					ip2config.pci_dev[i] = pci_dev_i;
					status =
					pci_read_config_dword(pci_dev_i, PCI_BASE_ADDRESS_1, &addr);
					if ( addr & 1 ) {
						ip2config.addr[i]=(USHORT)(addr&0xfffe);
					} else {
						printk( KERN_ERR "IP2: PCI I/O address error\n");
					}

//		If the PCI BIOS assigned it, lets try and use it.  If we
//		can't acquire it or it screws up, deal with it then.

//					if (!is_valid_irq(pci_irq)) {
//						printk( KERN_ERR "IP2: Bad PCI BIOS IRQ(%d)\n",pci_irq);
//						pci_irq = 0;
//					}
					ip2config.irq[i] = pci_dev_i->irq;
				} else {	// ann error
					ip2config.addr[i] = 0;
					if (status == PCIBIOS_DEVICE_NOT_FOUND) {
						printk( KERN_ERR "IP2: PCI board %d not found\n", i );
					} else {
						printk( KERN_ERR "IP2: PCI error 0x%x \n", status );
					}
				} 
			}
#else
			printk( KERN_ERR "IP2: PCI card specified but PCI support not\n");
			printk( KERN_ERR "IP2: configured in this kernel.\n");
			printk( KERN_ERR "IP2: Recompile kernel with CONFIG_PCI defined!\n");
#endif /* CONFIG_PCI */
			break;
		case EISA:
			if ( (ip2config.addr[i] = find_eisa_board( Eisa_slot + 1 )) != 0) {
				/* Eisa_irq set as side effect, boo */
				ip2config.type[i] = EISA;
			} 
			ip2config.irq[i] = Eisa_irq;
			break;
		}	/* switch */
	}	/* for */
	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
		if ( ip2config.addr[i] ) {
			pB = kmalloc( sizeof(i2eBordStr), GFP_KERNEL);
			if ( pB != NULL ) {
				i2BoardPtrTable[i] = pB;
				memset( pB, 0, sizeof(i2eBordStr) );
				iiSetAddress( pB, ip2config.addr[i], ii2DelayTimer );
				iiReset( pB );
			} else {
				printk(KERN_ERR "IP2: board memory allocation error\n");
			}
		}
	}
	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
		if ( ( pB = i2BoardPtrTable[i] ) != NULL ) {
			iiResetDelay( pB );
			break;
		}
	}
	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
		if ( i2BoardPtrTable[i] != NULL ) {
			ip2_init_board( i );
		}
	}

	ip2trace (ITRC_NO_PORT, ITRC_INIT, 2, 0 );

	ip2_tty_driver->owner		    = THIS_MODULE;
	ip2_tty_driver->name                 = "ttyF";
	ip2_tty_driver->devfs_name	    = "tts/F";
	ip2_tty_driver->driver_name          = pcDriver_name;
	ip2_tty_driver->major                = IP2_TTY_MAJOR;
	ip2_tty_driver->minor_start          = 0;
	ip2_tty_driver->type                 = TTY_DRIVER_TYPE_SERIAL;
	ip2_tty_driver->subtype              = SERIAL_TYPE_NORMAL;
	ip2_tty_driver->init_termios         = tty_std_termios;
	ip2_tty_driver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
	ip2_tty_driver->flags                = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
	tty_set_operations(ip2_tty_driver, &ip2_ops);

	ip2trace (ITRC_NO_PORT, ITRC_INIT, 3, 0 );

	/* Register the tty devices. */
	if ( ( err = tty_register_driver ( ip2_tty_driver ) ) ) {
		printk(KERN_ERR "IP2: failed to register tty driver (%d)\n", err);
		put_tty_driver(ip2_tty_driver);
		return -EINVAL;
	} else
	/* Register the IPL driver. */
	if ( ( err = register_chrdev ( IP2_IPL_MAJOR, pcIpl, &ip2_ipl ) ) ) {
		printk(KERN_ERR "IP2: failed to register IPL device (%d)\n", err );
	} else {
		/* create the sysfs class */
		ip2_class = class_create(THIS_MODULE, "ip2");
		if (IS_ERR(ip2_class)) {
			err = PTR_ERR(ip2_class);
			goto out_chrdev;	
		}
	}
	/* Register the read_procmem thing */
	if (!create_proc_info_entry("ip2mem",0,&proc_root,ip2_read_procmem)) {
		printk(KERN_ERR "IP2: failed to register read_procmem\n");
	} else {

	ip2trace (ITRC_NO_PORT, ITRC_INIT, 4, 0 );
		/* Register the interrupt handler or poll handler, depending upon the
		 * specified interrupt.
		 */

		for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
			if ( 0 == ip2config.addr[i] ) {
				continue;
			}

			if ( NULL != ( pB = i2BoardPtrTable[i] ) ) {
				class_device_create(ip2_class, NULL,
						MKDEV(IP2_IPL_MAJOR, 4 * i),
						NULL, "ipl%d", i);
				class_device_create(ip2_class, NULL,
						MKDEV(IP2_IPL_MAJOR, 4 * i + 1),
						NULL, "stat%d", i);

			    for ( box = 0; box < ABS_MAX_BOXES; ++box )
			    {
			        for ( j = 0; j < ABS_BIGGEST_BOX; ++j )
			        {
				    if ( pB->i2eChannelMap[box] & (1 << j) )
				    {
				        tty_register_device(ip2_tty_driver,
					    j + ABS_BIGGEST_BOX *
						    (box+i*ABS_MAX_BOXES), NULL);
			    	    }
			        }
			    }
			}

			if (poll_only) {
//		Poll only forces driver to only use polling and
//		to ignore the probed PCI or EISA interrupts.
				ip2config.irq[i] = CIR_POLL;
			}
			if ( ip2config.irq[i] == CIR_POLL ) {
retry:
				if (!TimerOn) {
					PollTimer.expires = POLL_TIMEOUT;
					add_timer ( &PollTimer );
					TimerOn = 1;
					printk( KERN_INFO "IP2: polling\n");
				}
			} else {
				if (have_requested_irq(ip2config.irq[i]))
					continue;
				rc = request_irq( ip2config.irq[i], ip2_interrupt,
					IP2_SA_FLAGS | (ip2config.type[i] == PCI ? SA_SHIRQ : 0),
					pcName, (void *)&pcName);
				if (rc) {
					printk(KERN_ERR "IP2: an request_irq failed: error %d\n",rc);
					ip2config.irq[i] = CIR_POLL;
					printk( KERN_INFO "IP2: Polling %ld/sec.\n",
							(POLL_TIMEOUT - jiffies));
					goto retry;
				} 
				mark_requested_irq(ip2config.irq[i]);
				/* Initialise the interrupt handler bottom half (aka slih). */
			}
		}
		for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
			if ( i2BoardPtrTable[i] ) {
				set_irq( i, ip2config.irq[i] ); /* set and enable board interrupt */
			}
		}
	}
	ip2trace (ITRC_NO_PORT, ITRC_INIT, ITRC_RETURN, 0 );
	goto out;

out_class:
	class_destroy(ip2_class);
out_chrdev:
	unregister_chrdev(IP2_IPL_MAJOR, "ip2");
out:
	return err;
}

EXPORT_SYMBOL(ip2_loadmain);

/******************************************************************************/
/* Function:   ip2_init_board()                                               */
/* Parameters: Index of board in configuration structure                      */
/* Returns:    Success (0)                                                    */
/*                                                                            */
/* Description:                                                               */
/* This function initializes the specified board. The loadware is copied to   */
/* the board, the channel structures are initialized, and the board details   */
/* are reported on the console.                                               */
/******************************************************************************/
static void
ip2_init_board( int boardnum )
{
	int i;
	int nports = 0, nboxes = 0;
	i2ChanStrPtr pCh;
	i2eBordStrPtr pB = i2BoardPtrTable[boardnum];

	if ( !iiInitialize ( pB ) ) {
		printk ( KERN_ERR "IP2: Failed to initialize board at 0x%x, error %d\n",
			 pB->i2eBase, pB->i2eError );
		goto err_initialize;
	}
	printk(KERN_INFO "IP2: Board %d: addr=0x%x irq=%d\n", boardnum + 1,
	       ip2config.addr[boardnum], ip2config.irq[boardnum] );

	if (!request_region( ip2config.addr[boardnum], 8, pcName )) {
		printk(KERN_ERR "IP2: bad addr=0x%x\n", ip2config.addr[boardnum]);
		goto err_initialize;
	}

	if ( iiDownloadAll ( pB, (loadHdrStrPtr)Fip_firmware, 1, Fip_firmware_size )
	    != II_DOWN_GOOD ) {
		printk ( KERN_ERR "IP2: failed to download loadware\n" );
		goto err_release_region;
	} else {
		printk ( KERN_INFO "IP2: fv=%d.%d.%d lv=%d.%d.%d\n",
			 pB->i2ePom.e.porVersion,
			 pB->i2ePom.e.porRevision,
			 pB->i2ePom.e.porSubRev, pB->i2eLVersion,
			 pB->i2eLRevision, pB->i2eLSub );
	}

	switch ( pB->i2ePom.e.porID & ~POR_ID_RESERVED ) {

	default:
		printk( KERN_ERR "IP2: Unknown board type, ID = %x\n",
				pB->i2ePom.e.porID );
		nports = 0;
		goto err_release_region;
		break;

	case POR_ID_II_4: /* IntelliPort-II, ISA-4 (4xRJ45) */
		printk ( KERN_INFO "IP2: ISA-4\n" );
		nports = 4;
		break;

	case POR_ID_II_8: /* IntelliPort-II, 8-port using standard brick. */
		printk ( KERN_INFO "IP2: ISA-8 std\n" );
		nports = 8;
		break;

	case POR_ID_II_8R: /* IntelliPort-II, 8-port using RJ11's (no CTS) */
		printk ( KERN_INFO "IP2: ISA-8 RJ11\n" );
		nports = 8;
		break;

	case POR_ID_FIIEX: /* IntelliPort IIEX */
	{
		int portnum = IP2_PORTS_PER_BOARD * boardnum;
		int            box;

		for( box = 0; box < ABS_MAX_BOXES; ++box ) {
			if ( pB->i2eChannelMap[box] != 0 ) {
				++nboxes;
			}
			for( i = 0; i < ABS_BIGGEST_BOX; ++i ) {
				if ( pB->i2eChannelMap[box] & 1<< i ) {
					++nports;
				}
			}
		}
		DevTableMem[boardnum] = pCh =
			kmalloc( sizeof(i2ChanStr) * nports, GFP_KERNEL );
		if ( !pCh ) {
			printk ( KERN_ERR "IP2: (i2_init_channel:) Out of memory.\n");
			goto err_release_region;
		}
		if ( !i2InitChannels( pB, nports, pCh ) ) {
			printk(KERN_ERR "IP2: i2InitChannels failed: %d\n",pB->i2eError);
			kfree ( pCh );
			goto err_release_region;
		}
		pB->i2eChannelPtr = &DevTable[portnum];
		pB->i2eChannelCnt = ABS_MOST_PORTS;

		for( box = 0; box < ABS_MAX_BOXES; ++box, portnum += ABS_BIGGEST_BOX ) {
			for( i = 0; i < ABS_BIGGEST_BOX; ++i ) {
				if ( pB->i2eChannelMap[box] & (1 << i) ) {
					DevTable[portnum + i] = pCh;
					pCh->port_index = portnum + i;
					pCh++;
				}
			}
		}
		printk(KERN_INFO "IP2: EX box=%d ports=%d %d bit\n",
			nboxes, nports, pB->i2eDataWidth16 ? 16 : 8 );
		}
		goto ex_exit;
	}
	DevTableMem[boardnum] = pCh =
		kmalloc ( sizeof (i2ChanStr) * nports, GFP_KERNEL );
	if ( !pCh ) {
		printk ( KERN_ERR "IP2: (i2_init_channel:) Out of memory.\n");
		goto err_release_region;
	}
	pB->i2eChannelPtr = pCh;
	pB->i2eChannelCnt = nports;
	if ( !i2InitChannels( pB, nports, pCh ) ) {
		printk(KERN_ERR "IP2: i2InitChannels failed: %d\n",pB->i2eError);
		kfree ( pCh );
		goto err_release_region;
	}
	pB->i2eChannelPtr = &DevTable[IP2_PORTS_PER_BOARD * boardnum];

	for( i = 0; i < pB->i2eChannelCnt; ++i ) {
		DevTable[IP2_PORTS_PER_BOARD * boardnum + i] = pCh;
		pCh->port_index = (IP2_PORTS_PER_BOARD * boardnum) + i;
		pCh++;
	}
ex_exit:
	INIT_WORK(&pB->tqueue_interrupt, (void(*)(void*)) ip2_interrupt_bh, pB);
	return;

err_release_region:
	release_region(ip2config.addr[boardnum], 8);
err_initialize:
	kfree ( pB );
	i2BoardPtrTable[boardnum] = NULL;
	return;
}

/******************************************************************************/
/* Function:   find_eisa_board ( int start_slot )                             */
/* Parameters: First slot to check                                            */
/* Returns:    Address of EISA IntelliPort II controller                      */
/*                                                                            */
/* Description:                                                               */
/* This function searches for an EISA IntelliPort controller, starting        */
/* from the specified slot number. If the motherboard is not identified as an */
/* EISA motherboard, or no valid board ID is selected it returns 0. Otherwise */
/* it returns the base address of the controller.                             */
/******************************************************************************/
static unsigned short
find_eisa_board( int start_slot )
{
	int i, j;
	unsigned int idm = 0;
	unsigned int idp = 0;
	unsigned int base = 0;
	unsigned int value;
	int setup_address;
	int setup_irq;
	int ismine = 0;

	/*
	 * First a check for an EISA motherboard, which we do by comparing the
	 * EISA ID registers for the system board and the first couple of slots.
	 * No slot ID should match the system board ID, but on an ISA or PCI
	 * machine the odds are that an empty bus will return similar values for
	 * each slot.
	 */
	i = 0x0c80;
	value = (inb(i) << 24) + (inb(i+1) << 16) + (inb(i+2) << 8) + inb(i+3);
	for( i = 0x1c80; i <= 0x4c80; i += 0x1000 ) {
		j = (inb(i)<<24)+(inb(i+1)<<16)+(inb(i+2)<<8)+inb(i+3);
		if ( value == j )
			return 0;
	}

	/*
	 * OK, so we are inclined to believe that this is an EISA machine. Find
	 * an IntelliPort controller.
	 */
	for( i = start_slot; i < 16; i++ ) {
		base = i << 12;
		idm = (inb(base + 0xc80) << 8) | (inb(base + 0xc81) & 0xff);
		idp = (inb(base + 0xc82) << 8) | (inb(base + 0xc83) & 0xff);
		ismine = 0;
		if ( idm == 0x0e8e ) {
			if ( idp == 0x0281 || idp == 0x0218 ) {
				ismine = 1;
			} else if ( idp == 0x0282 || idp == 0x0283 ) {
				ismine = 3;	/* Can do edge-trigger */
			}
			if ( ismine ) {
				Eisa_slot = i;
				break;
			}
		}
	}
	if ( !ismine )
		return 0;

	/* It's some sort of EISA card, but at what address is it configured? */

	setup_address = base + 0xc88;
	value = inb(base + 0xc86);
	setup_irq = (value & 8) ? Valid_Irqs[value & 7] : 0;

	if ( (ismine & 2) && !(value & 0x10) ) {
		ismine = 1;	/* Could be edging, but not */
	}

	if ( Eisa_irq == 0 ) {
		Eisa_irq = setup_irq;
	} else if ( Eisa_irq != setup_irq ) {
		printk ( KERN_ERR "IP2: EISA irq mismatch between EISA controllers\n" );
	}

#ifdef IP2DEBUG_INIT
printk(KERN_DEBUG "Computone EISA board in slot %d, I.D. 0x%x%x, Address 0x%x",
	       base >> 12, idm, idp, setup_address);
	if ( Eisa_irq ) {
		printk(KERN_DEBUG ", Interrupt %d %s\n",
		       setup_irq, (ismine & 2) ? "(edge)" : "(level)");
	} else {
		printk(KERN_DEBUG ", (polled)\n");
	}
#endif
	return setup_address;
}

/******************************************************************************/
/* Function:   set_irq()                                                      */
/* Parameters: index to board in board table                                  */
/*             IRQ to use                                                     */
/* Returns:    Success (0)                                                    */
/*                                                                            */
/* Description:                                                               */
/******************************************************************************/
static void
set_irq( int boardnum, int boardIrq )
{
	unsigned char tempCommand[16];
	i2eBordStrPtr pB = i2BoardPtrTable[boardnum];
	unsigned long flags;

	/*
	 * Notify the boards they may generate interrupts. This is done by
	 * sending an in-line command to channel 0 on each board. This is why
	 * the channels have to be defined already. For each board, if the
	 * interrupt has never been defined, we must do so NOW, directly, since
	 * board will not send flow control or even give an interrupt until this
	 * is done.  If polling we must send 0 as the interrupt parameter.
	 */

	// We will get an interrupt here at the end of this function

	iiDisableMailIrq(pB);

	/* We build up the entire packet header. */
	CHANNEL_OF(tempCommand) = 0;
	PTYPE_OF(tempCommand) = PTYPE_INLINE;
	CMD_COUNT_OF(tempCommand) = 2;
	(CMD_OF(tempCommand))[0] = CMDVALUE_IRQ;
	(CMD_OF(tempCommand))[1] = boardIrq;
	/*
	 * Write to FIFO; don't bother to adjust fifo capacity for this, since
	 * board will respond almost immediately after SendMail hit.
	 */
	WRITE_LOCK_IRQSAVE(&pB->write_fifo_spinlock,flags);
	iiWriteBuf(pB, tempCommand, 4);
	WRITE_UNLOCK_IRQRESTORE(&pB->write_fifo_spinlock,flags);
	pB->i2eUsingIrq = boardIrq;
	pB->i2eOutMailWaiting |= MB_OUT_STUFFED;

	/* Need to update number of boards before you enable mailbox int */
	++i2nBoards;

	CHANNEL_OF(tempCommand) = 0;
	PTYPE_OF(tempCommand) = PTYPE_BYPASS;
	CMD_COUNT_OF(tempCommand) = 6;
	(CMD_OF(tempCommand))[0] = 88;	// SILO
	(CMD_OF(tempCommand))[1] = 64;	// chars
	(CMD_OF(tempCommand))[2] = 32;	// ms

	(CMD_OF(tempCommand))[3] = 28;	// MAX_BLOCK
	(CMD_OF(tempCommand))[4] = 64;	// chars

	(CMD_OF(tempCommand))[5] = 87;	// HW_TEST
	WRITE_LOCK_IRQSAVE(&pB->write_fifo_spinlock,flags);
	iiWriteBuf(pB, tempCommand, 8);
	WRITE_UNLOCK_IRQRESTORE(&pB->write_fifo_spinlock,flags);

	CHANNEL_OF(tempCommand) = 0;
	PTYPE_OF(tempCommand) = PTYPE_BYPASS;
	CMD_COUNT_OF(tempCommand) = 1;
	(CMD_OF(tempCommand))[0] = 84;	/* get BOX_IDS */
	iiWriteBuf(pB, tempCommand, 3);

#ifdef XXX
	// enable heartbeat for test porpoises
	CHANNEL_OF(tempCommand) = 0;
	PTYPE_OF(tempCommand) = PTYPE_BYPASS;
	CMD_COUNT_OF(tempCommand) = 2;
	(CMD_OF(tempCommand))[0] = 44;	/* get ping */
	(CMD_OF(tempCommand))[1] = 200;	/* 200 ms */
	WRITE_LOCK_IRQSAVE(&pB->write_fifo_spinlock,flags);
	iiWriteBuf(pB, tempCommand, 4);
	WRITE_UNLOCK_IRQRESTORE(&pB->write_fifo_spinlock,flags);
#endif

	iiEnableMailIrq(pB);
	iiSendPendingMail(pB);
}

/******************************************************************************/
/* Interrupt Handler Section                                                  */
/******************************************************************************/

static inline void
service_all_boards(void)
{
	int i;
	i2eBordStrPtr  pB;

	/* Service every board on the list */
	for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
		pB = i2BoardPtrTable[i];
		if ( pB ) {
			i2ServiceBoard( pB );
		}
	}
}


/******************************************************************************/
/* Function:   ip2_interrupt_bh(pB)                                           */
/* Parameters: pB - pointer to the board structure                            */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/*	Service the board in a bottom half interrupt handler and then         */
/*	reenable the board's interrupts if it has an IRQ number               */
/*                                                                            */
/******************************************************************************/
static void
ip2_interrupt_bh(i2eBordStrPtr pB)
{
//	pB better well be set or we have a problem!  We can only get
//	here from the IMMEDIATE queue.  Here, we process the boards.
//	Checking pB doesn't cost much and it saves us from the sanity checkers.

	bh_counter++; 

	if ( pB ) {
		i2ServiceBoard( pB );
		if( pB->i2eUsingIrq ) {
//			Re-enable his interrupts
			iiEnableMailIrq(pB);
		}
	}
}


/******************************************************************************/
/* Function:   ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs)    */
/* Parameters: irq - interrupt number                                         */
/*             pointer to optional device ID structure                        */
/*             pointer to register structure                                  */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*	Our task here is simply to identify each board which needs servicing. */
/*	If we are queuing then, queue it to be serviced, and disable its irq  */
/*	mask otherwise process the board directly.                            */
/*                                                                            */
/*	We could queue by IRQ but that just complicates things on both ends   */
/*	with very little gain in performance (how many instructions does      */
/*	it take to iterate on the immediate queue).                           */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static irqreturn_t
ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs)
{
	int i;
	i2eBordStrPtr  pB;
	int handled = 0;

	ip2trace (ITRC_NO_PORT, ITRC_INTR, 99, 1, irq );

	/* Service just the boards on the list using this irq */
	for( i = 0; i < i2nBoards; ++i ) {
		pB = i2BoardPtrTable[i];

//		Only process those boards which match our IRQ.
//			IRQ = 0 for polled boards, we won't poll "IRQ" boards

		if ( pB && (pB->i2eUsingIrq == irq) ) {
			handled = 1;
#ifdef USE_IQI

		    if (NO_MAIL_HERE != ( pB->i2eStartMail = iiGetMail(pB))) {
//			Disable his interrupt (will be enabled when serviced)
//			This is mostly to protect from reentrancy.
			iiDisableMailIrq(pB);

//			Park the board on the immediate queue for processing.
			schedule_work(&pB->tqueue_interrupt);

//			Make sure the immediate queue is flagged to fire.
		    }
#else
//		We are using immediate servicing here.  This sucks and can
//		cause all sorts of havoc with ppp and others.  The failsafe
//		check on iiSendPendingMail could also throw a hairball.
			i2ServiceBoard( pB );
#endif /* USE_IQI */
		}
	}

	++irq_counter;

	ip2trace (ITRC_NO_PORT, ITRC_INTR, ITRC_RETURN, 0 );
	return IRQ_RETVAL(handled);
}

/******************************************************************************/
/* Function:   ip2_poll(unsigned long arg)                                    */
/* Parameters: ?                                                              */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/* This function calls the library routine i2ServiceBoard for each board in   */
/* the board table. This is used instead of the interrupt routine when polled */
/* mode is specified.                                                         */
/******************************************************************************/
static void
ip2_poll(unsigned long arg)
{
	ip2trace (ITRC_NO_PORT, ITRC_INTR, 100, 0 );

	TimerOn = 0; // it's the truth but not checked in service

	// Just polled boards, IRQ = 0 will hit all non-interrupt boards.
	// It will NOT poll boards handled by hard interrupts.
	// The issue of queued BH interrups is handled in ip2_interrupt().
	ip2_interrupt(0, NULL, NULL);

	PollTimer.expires = POLL_TIMEOUT;
	add_timer( &PollTimer );
	TimerOn = 1;

	ip2trace (ITRC_NO_PORT, ITRC_INTR, ITRC_RETURN, 0 );
}

static void do_input(void *p)
{
	i2ChanStrPtr pCh = p;
	unsigned long flags;

	ip2trace(CHANN, ITRC_INPUT, 21, 0 );

	// Data input
	if ( pCh->pTTY != NULL ) {
		READ_LOCK_IRQSAVE(&pCh->Ibuf_spinlock,flags)
		if (!pCh->throttled && (pCh->Ibuf_stuff != pCh->Ibuf_strip)) {
			READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
			i2Input( pCh );
		} else
			READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
	} else {
		ip2trace(CHANN, ITRC_INPUT, 22, 0 );

		i2InputFlush( pCh );
	}
}

// code duplicated from n_tty (ldisc)
static inline void  isig(int sig, struct tty_struct *tty, int flush)
{
	if (tty->pgrp > 0)
		kill_pg(tty->pgrp, sig, 1);
	if (flush || !L_NOFLSH(tty)) {
		if ( tty->ldisc.flush_buffer )  
			tty->ldisc.flush_buffer(tty);
		i2InputFlush( tty->driver_data );
	}
}

static void do_status(void *p)
{
	i2ChanStrPtr pCh = p;
	int status;

	status =  i2GetStatus( pCh, (I2_BRK|I2_PAR|I2_FRA|I2_OVR) );

	ip2trace (CHANN, ITRC_STATUS, 21, 1, status );

	if (pCh->pTTY && (status & (I2_BRK|I2_PAR|I2_FRA|I2_OVR)) ) {
		if ( (status & I2_BRK) ) {
			// code duplicated from n_tty (ldisc)
			if (I_IGNBRK(pCh->pTTY))
				goto skip_this;
			if (I_BRKINT(pCh->pTTY)) {
				isig(SIGINT, pCh->pTTY, 1);
				goto skip_this;
			}
			wake_up_interruptible(&pCh->pTTY->read_wait);
		}
#ifdef NEVER_HAPPENS_AS_SETUP_XXX
	// and can't work because we don't know the_char
	// as the_char is reported on a separate path
	// The intelligent board does this stuff as setup
	{
	char brkf = TTY_NORMAL;
	unsigned char brkc = '\0';
	unsigned char tmp;
		if ( (status & I2_BRK) ) {
			brkf = TTY_BREAK;
			brkc = '\0';
		} 
		else if (status & I2_PAR) {
			brkf = TTY_PARITY;
			brkc = the_char;
		} else if (status & I2_FRA) {
			brkf = TTY_FRAME;
			brkc = the_char;
		} else if (status & I2_OVR) {
			brkf = TTY_OVERRUN;
			brkc = the_char;
		}
		tmp = pCh->pTTY->real_raw;
		pCh->pTTY->real_raw = 0;
		pCh->pTTY->ldisc.receive_buf( pCh->pTTY, &brkc, &brkf, 1 );
		pCh->pTTY->real_raw = tmp;
	}
#endif /* NEVER_HAPPENS_AS_SETUP_XXX */
	}
skip_this:

	if ( status & (I2_DDCD | I2_DDSR | I2_DCTS | I2_DRI) ) {
		wake_up_interruptible(&pCh->delta_msr_wait);

		if ( (pCh->flags & ASYNC_CHECK_CD) && (status & I2_DDCD) ) {
			if ( status & I2_DCD ) {
				if ( pCh->wopen ) {
					wake_up_interruptible ( &pCh->open_wait );
				}
			} else {
				if (pCh->pTTY &&  (!(pCh->pTTY->termios->c_cflag & CLOCAL)) ) {
					tty_hangup( pCh->pTTY );
				}
			}
		}
	}

	ip2trace (CHANN, ITRC_STATUS, 26, 0 );
}

/******************************************************************************/
/* Device Open/Close/Ioctl Entry Point Section                                */
/******************************************************************************/

/******************************************************************************/
/* Function:   open_sanity_check()                                            */
/* Parameters: Pointer to tty structure                                       */
/*             Pointer to file structure                                      */
/* Returns:    Success or failure                                             */
/*                                                                            */
/* Description:                                                               */
/* Verifies the structure magic numbers and cross links.                      */
/******************************************************************************/
#ifdef IP2DEBUG_OPEN
static void 
open_sanity_check( i2ChanStrPtr pCh, i2eBordStrPtr pBrd )
{
	if ( pBrd->i2eValid != I2E_MAGIC ) {
		printk(KERN_ERR "IP2: invalid board structure\n" );
	} else if ( pBrd != pCh->pMyBord ) {
		printk(KERN_ERR "IP2: board structure pointer mismatch (%p)\n",
			 pCh->pMyBord );
	} else if ( pBrd->i2eChannelCnt < pCh->port_index ) {
		printk(KERN_ERR "IP2: bad device index (%d)\n", pCh->port_index );
	} else if (&((i2ChanStrPtr)pBrd->i2eChannelPtr)[pCh->port_index] != pCh) {
	} else {
		printk(KERN_INFO "IP2: all pointers check out!\n" );
	}
}
#endif


/******************************************************************************/
/* Function:   ip2_open()                                                     */
/* Parameters: Pointer to tty structure                                       */
/*             Pointer to file structure                                      */
/* Returns:    Success or failure                                             */
/*                                                                            */
/* Description: (MANDATORY)                                                   */
/* A successful device open has to run a gauntlet of checks before it         */
/* completes. After some sanity checking and pointer setup, the function      */
/* blocks until all conditions are satisfied. It then initialises the port to */
/* the default characteristics and returns.                                   */
/******************************************************************************/
static int
ip2_open( PTTY tty, struct file *pFile )
{
	wait_queue_t wait;
	int rc = 0;
	int do_clocal = 0;
	i2ChanStrPtr  pCh = DevTable[tty->index];

	ip2trace (tty->index, ITRC_OPEN, ITRC_ENTER, 0 );

	if ( pCh == NULL ) {
		return -ENODEV;
	}
	/* Setup pointer links in device and tty structures */
	pCh->pTTY = tty;
	tty->driver_data = pCh;

#ifdef IP2DEBUG_OPEN
	printk(KERN_DEBUG \
			"IP2:open(tty=%p,pFile=%p):dev=%s,ch=%d,idx=%d\n",
	       tty, pFile, tty->name, pCh->infl.hd.i2sChannel, pCh->port_index);
	open_sanity_check ( pCh, pCh->pMyBord );
#endif

	i2QueueCommands(PTYPE_INLINE, pCh, 100, 3, CMD_DTRUP,CMD_RTSUP,CMD_DCD_REP);
	pCh->dataSetOut |= (I2_DTR | I2_RTS);
	serviceOutgoingFifo( pCh->pMyBord );

	/* Block here until the port is ready (per serial and istallion) */
	/*
	 * 1. If the port is in the middle of closing wait for the completion
	 *    and then return the appropriate error.
	 */
	init_waitqueue_entry(&wait, current);
	add_wait_queue(&pCh->close_wait, &wait);
	set_current_state( TASK_INTERRUPTIBLE );

	if ( tty_hung_up_p(pFile) || ( pCh->flags & ASYNC_CLOSING )) {
		if ( pCh->flags & ASYNC_CLOSING ) {
			schedule();
		}
		if ( tty_hung_up_p(pFile) ) {
			set_current_state( TASK_RUNNING );
			remove_wait_queue(&pCh->close_wait, &wait);
			return( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EAGAIN : -ERESTARTSYS;
		}
	}
	set_current_state( TASK_RUNNING );
	remove_wait_queue(&pCh->close_wait, &wait);

	/*
	 * 3. Handle a non-blocking open of a normal port.
	 */
	if ( (pFile->f_flags & O_NONBLOCK) || (tty->flags & (1<<TTY_IO_ERROR) )) {
		pCh->flags |= ASYNC_NORMAL_ACTIVE;
		goto noblock;
	}
	/*
	 * 4. Now loop waiting for the port to be free and carrier present
	 *    (if required).
	 */
	if ( tty->termios->c_cflag & CLOCAL )
		do_clocal = 1;

#ifdef IP2DEBUG_OPEN
	printk(KERN_DEBUG "OpenBlock: do_clocal = %d\n", do_clocal);
#endif

	++pCh->wopen;

	init_waitqueue_entry(&wait, current);
	add_wait_queue(&pCh->open_wait, &wait);

	for(;;) {
		i2QueueCommands(PTYPE_INLINE, pCh, 100, 2, CMD_DTRUP, CMD_RTSUP);
		pCh->dataSetOut |= (I2_DTR | I2_RTS);
		set_current_state( TASK_INTERRUPTIBLE );
		serviceOutgoingFifo( pCh->pMyBord );
		if ( tty_hung_up_p(pFile) ) {
			set_current_state( TASK_RUNNING );
			remove_wait_queue(&pCh->open_wait, &wait);
			return ( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EBUSY : -ERESTARTSYS;
		}
		if (!(pCh->flags & ASYNC_CLOSING) && 
				(do_clocal || (pCh->dataSetIn & I2_DCD) )) {
			rc = 0;
			break;
		}

#ifdef IP2DEBUG_OPEN
		printk(KERN_DEBUG "ASYNC_CLOSING = %s\n",
			(pCh->flags & ASYNC_CLOSING)?"True":"False");
		printk(KERN_DEBUG "OpenBlock: waiting for CD or signal\n");
#endif
		ip2trace (CHANN, ITRC_OPEN, 3, 2, 0,
				(pCh->flags & ASYNC_CLOSING) );
		/* check for signal */
		if (signal_pending(current)) {
			rc = (( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EAGAIN : -ERESTARTSYS);
			break;
		}
		schedule();
	}
	set_current_state( TASK_RUNNING );
	remove_wait_queue(&pCh->open_wait, &wait);

	--pCh->wopen; //why count?

	ip2trace (CHANN, ITRC_OPEN, 4, 0 );

	if (rc != 0 ) {
		return rc;
	}
	pCh->flags |= ASYNC_NORMAL_ACTIVE;

noblock:

	/* first open - Assign termios structure to port */
	if ( tty->count == 1 ) {
		i2QueueCommands(PTYPE_INLINE, pCh, 0, 2, CMD_CTSFL_DSAB, CMD_RTSFL_DSAB);
		/* Now we must send the termios settings to the loadware */
		set_params( pCh, NULL );
	}

	/*
	 * Now set any i2lib options. These may go away if the i2lib code ends
	 * up rolled into the mainline.
	 */
	pCh->channelOptions |= CO_NBLOCK_WRITE;

#ifdef IP2DEBUG_OPEN
	printk (KERN_DEBUG "IP2: open completed\n" );
#endif
	serviceOutgoingFifo( pCh->pMyBord );

	ip2trace (CHANN, ITRC_OPEN, ITRC_RETURN, 0 );

	return 0;
}

/******************************************************************************/
/* Function:   ip2_close()                                                    */
/* Parameters: Pointer to tty structure                                       */
/*             Pointer to file structure                                      */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static void
ip2_close( PTTY tty, struct file *pFile )
{
	i2ChanStrPtr  pCh = tty->driver_data;

	if ( !pCh ) {
		return;
	}

	ip2trace (CHANN, ITRC_CLOSE, ITRC_ENTER, 0 );

#ifdef IP2DEBUG_OPEN
	printk(KERN_DEBUG "IP2:close %s:\n",tty->name);
#endif

	if ( tty_hung_up_p ( pFile ) ) {

		ip2trace (CHANN, ITRC_CLOSE, 2, 1, 2 );

		return;
	}
	if ( tty->count > 1 ) { /* not the last close */

		ip2trace (CHANN, ITRC_CLOSE, 2, 1, 3 );

		return;
	}
	pCh->flags |= ASYNC_CLOSING;	// last close actually

	tty->closing = 1;

	if (pCh->ClosingWaitTime != ASYNC_CLOSING_WAIT_NONE) {
		/*
		 * Before we drop DTR, make sure the transmitter has completely drained.
		 * This uses an timeout, after which the close
		 * completes.
		 */
		ip2_wait_until_sent(tty, pCh->ClosingWaitTime );
	}
	/*
	 * At this point we stop accepting input. Here we flush the channel
	 * input buffer which will allow the board to send up more data. Any
	 * additional input is tossed at interrupt/poll time.
	 */
	i2InputFlush( pCh );

	/* disable DSS reporting */
	i2QueueCommands(PTYPE_INLINE, pCh, 100, 4,
				CMD_DCD_NREP, CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
	if ( !tty || (tty->termios->c_cflag & HUPCL) ) {
		i2QueueCommands(PTYPE_INLINE, pCh, 100, 2, CMD_RTSDN, CMD_DTRDN);
		pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
		i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
	}

	serviceOutgoingFifo ( pCh->pMyBord );

	if ( tty->driver->flush_buffer ) 
		tty->driver->flush_buffer(tty);
	if ( tty->ldisc.flush_buffer )  
		tty->ldisc.flush_buffer(tty);
	tty->closing = 0;
	
	pCh->pTTY = NULL;

	if (pCh->wopen) {
		if (pCh->ClosingDelay) {
			msleep_interruptible(jiffies_to_msecs(pCh->ClosingDelay));
		}
		wake_up_interruptible(&pCh->open_wait);
	}

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

#ifdef IP2DEBUG_OPEN
	DBG_CNT("ip2_close: after wakeups--");
#endif


	ip2trace (CHANN, ITRC_CLOSE, ITRC_RETURN, 1, 1 );

	return;
}

/******************************************************************************/
/* Function:   ip2_hangup()                                                   */
/* Parameters: Pointer to tty structure                                       */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static void
ip2_hangup ( PTTY tty )
{
	i2ChanStrPtr  pCh = tty->driver_data;

	if( !pCh ) {
		return;
	}

	ip2trace (CHANN, ITRC_HANGUP, ITRC_ENTER, 0 );

	ip2_flush_buffer(tty);

	/* disable DSS reporting */

	i2QueueCommands(PTYPE_BYPASS, pCh, 0, 1, CMD_DCD_NREP);
	i2QueueCommands(PTYPE_INLINE, pCh, 0, 2, CMD_CTSFL_DSAB, CMD_RTSFL_DSAB);
	if ( (tty->termios->c_cflag & HUPCL) ) {
		i2QueueCommands(PTYPE_BYPASS, pCh, 0, 2, CMD_RTSDN, CMD_DTRDN);
		pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
		i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
	}
	i2QueueCommands(PTYPE_INLINE, pCh, 1, 3, 
				CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
	serviceOutgoingFifo ( pCh->pMyBord );

	wake_up_interruptible ( &pCh->delta_msr_wait );

	pCh->flags &= ~ASYNC_NORMAL_ACTIVE;
	pCh->pTTY = NULL;
	wake_up_interruptible ( &pCh->open_wait );

	ip2trace (CHANN, ITRC_HANGUP, ITRC_RETURN, 0 );
}

/******************************************************************************/
/******************************************************************************/
/* Device Output Section                                                      */
/******************************************************************************/
/******************************************************************************/

/******************************************************************************/
/* Function:   ip2_write()                                                    */
/* Parameters: Pointer to tty structure                                       */
/*             Flag denoting data is in user (1) or kernel (0) space          */
/*             Pointer to data                                                */
/*             Number of bytes to write                                       */
/* Returns:    Number of bytes actually written                               */
/*                                                                            */
/* Description: (MANDATORY)                                                   */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static int
ip2_write( PTTY tty, const unsigned char *pData, int count)
{
	i2ChanStrPtr  pCh = tty->driver_data;
	int bytesSent = 0;
	unsigned long flags;

	ip2trace (CHANN, ITRC_WRITE, ITRC_ENTER, 2, count, -1 );

	/* Flush out any buffered data left over from ip2_putchar() calls. */
	ip2_flush_chars( tty );

	/* This is the actual move bit. Make sure it does what we need!!!!! */
	WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
	bytesSent = i2Output( pCh, pData, count, 0 );
	WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);

	ip2trace (CHANN, ITRC_WRITE, ITRC_RETURN, 1, bytesSent );

	return bytesSent > 0 ? bytesSent : 0;
}

/******************************************************************************/
/* Function:   ip2_putchar()                                                  */
/* Parameters: Pointer to tty structure                                       */
/*             Character to write                                             */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static void
ip2_putchar( PTTY tty, unsigned char ch )
{
	i2ChanStrPtr  pCh = tty->driver_data;
	unsigned long flags;

//	ip2trace (CHANN, ITRC_PUTC, ITRC_ENTER, 1, ch );

	WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
	pCh->Pbuf[pCh->Pbuf_stuff++] = ch;
	if ( pCh->Pbuf_stuff == sizeof pCh->Pbuf ) {
		WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
		ip2_flush_chars( tty );
	} else
		WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);

//	ip2trace (CHANN, ITRC_PUTC, ITRC_RETURN, 1, ch );
}

/******************************************************************************/
/* Function:   ip2_flush_chars()                                              */
/* Parameters: Pointer to tty structure                                       */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/******************************************************************************/
static void
ip2_flush_chars( PTTY tty )
{
	int   strip;
	i2ChanStrPtr  pCh = tty->driver_data;
	unsigned long flags;

	WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
	if ( pCh->Pbuf_stuff ) {

//		ip2trace (CHANN, ITRC_PUTC, 10, 1, strip );

		//
		// We may need to restart i2Output if it does not fullfill this request
		//
		strip = i2Output( pCh, pCh->Pbuf, pCh->Pbuf_stuff, 0 );
		if ( strip != pCh->Pbuf_stuff ) {
			memmove( pCh->Pbuf, &pCh->Pbuf[strip], pCh->Pbuf_stuff - strip );
		}
		pCh->Pbuf_stuff -= strip;
	}
	WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
}

/******************************************************************************/
/* Function:   ip2_write_room()                                               */
/* Parameters: Pointer to tty structure                                       */
/* Returns:    Number of bytes that the driver can accept                     */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/******************************************************************************/
static int
ip2_write_room ( PTTY tty )
{
	int bytesFree;
	i2ChanStrPtr  pCh = tty->driver_data;
	unsigned long flags;

	READ_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
	bytesFree = i2OutputFree( pCh ) - pCh->Pbuf_stuff;
	READ_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);

	ip2trace (CHANN, ITRC_WRITE, 11, 1, bytesFree );

	return ((bytesFree > 0) ? bytesFree : 0);
}

/******************************************************************************/
/* Function:   ip2_chars_in_buf()                                             */
/* Parameters: Pointer to tty structure                                       */
/* Returns:    Number of bytes queued for transmission                        */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static int
ip2_chars_in_buf ( PTTY tty )
{
	i2ChanStrPtr  pCh = tty->driver_data;
	int rc;
	unsigned long flags;

	ip2trace (CHANN, ITRC_WRITE, 12, 1, pCh->Obuf_char_count + pCh->Pbuf_stuff );

#ifdef IP2DEBUG_WRITE
	printk (KERN_DEBUG "IP2: chars in buffer = %d (%d,%d)\n",
				 pCh->Obuf_char_count + pCh->Pbuf_stuff,
				 pCh->Obuf_char_count, pCh->Pbuf_stuff );
#endif
	READ_LOCK_IRQSAVE(&pCh->Obuf_spinlock,flags);
	rc =  pCh->Obuf_char_count;
	READ_UNLOCK_IRQRESTORE(&pCh->Obuf_spinlock,flags);
	READ_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
	rc +=  pCh->Pbuf_stuff;
	READ_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
	return rc;
}

/******************************************************************************/
/* Function:   ip2_flush_buffer()                                             */
/* Parameters: Pointer to tty structure                                       */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static void
ip2_flush_buffer( PTTY tty )
{
	i2ChanStrPtr  pCh = tty->driver_data;
	unsigned long flags;

	ip2trace (CHANN, ITRC_FLUSH, ITRC_ENTER, 0 );

#ifdef IP2DEBUG_WRITE
	printk (KERN_DEBUG "IP2: flush buffer\n" );
#endif
	WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
	pCh->Pbuf_stuff = 0;
	WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
	i2FlushOutput( pCh );
	ip2_owake(tty);

	ip2trace (CHANN, ITRC_FLUSH, ITRC_RETURN, 0 );

}

/******************************************************************************/
/* Function:   ip2_wait_until_sent()                                          */
/* Parameters: Pointer to tty structure                                       */
/*             Timeout for wait.                                              */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/* This function is used in place of the normal tty_wait_until_sent, which    */
/* only waits for the driver buffers to be empty (or rather, those buffers    */
/* reported by chars_in_buffer) which doesn't work for IP2 due to the         */
/* indeterminate number of bytes buffered on the board.                       */
/******************************************************************************/
static void
ip2_wait_until_sent ( PTTY tty, int timeout )
{
	int i = jiffies;
	i2ChanStrPtr  pCh = tty->driver_data;

	tty_wait_until_sent(tty, timeout );
	if ( (i = timeout - (jiffies -i)) > 0)
		i2DrainOutput( pCh, i );
}

/******************************************************************************/
/******************************************************************************/
/* Device Input Section                                                       */
/******************************************************************************/
/******************************************************************************/

/******************************************************************************/
/* Function:   ip2_throttle()                                                 */
/* Parameters: Pointer to tty structure                                       */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static void
ip2_throttle ( PTTY tty )
{
	i2ChanStrPtr  pCh = tty->driver_data;

#ifdef IP2DEBUG_READ
	printk (KERN_DEBUG "IP2: throttle\n" );
#endif
	/*
	 * Signal the poll/interrupt handlers not to forward incoming data to
	 * the line discipline. This will cause the buffers to fill up in the
	 * library and thus cause the library routines to send the flow control
	 * stuff.
	 */
	pCh->throttled = 1;
}

/******************************************************************************/
/* Function:   ip2_unthrottle()                                               */
/* Parameters: Pointer to tty structure                                       */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static void
ip2_unthrottle ( PTTY tty )
{
	i2ChanStrPtr  pCh = tty->driver_data;
	unsigned long flags;

#ifdef IP2DEBUG_READ
	printk (KERN_DEBUG "IP2: unthrottle\n" );
#endif

	/* Pass incoming data up to the line discipline again. */
	pCh->throttled = 0;
 	i2QueueCommands(PTYPE_BYPASS, pCh, 0, 1, CMD_RESUME);
	serviceOutgoingFifo( pCh->pMyBord );
	READ_LOCK_IRQSAVE(&pCh->Ibuf_spinlock,flags)
	if ( pCh->Ibuf_stuff != pCh->Ibuf_strip ) {
		READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
#ifdef IP2DEBUG_READ
		printk (KERN_DEBUG "i2Input called from unthrottle\n" );
#endif
		i2Input( pCh );
	} else
		READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
}

static void
ip2_start ( PTTY tty )
{
 	i2ChanStrPtr  pCh = DevTable[tty->index];

 	i2QueueCommands(PTYPE_BYPASS, pCh, 0, 1, CMD_RESUME);
 	i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_UNSUSPEND);
 	i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_RESUME);
#ifdef IP2DEBUG_WRITE
	printk (KERN_DEBUG "IP2: start tx\n" );
#endif
}

static void
ip2_stop ( PTTY tty )
{
 	i2ChanStrPtr  pCh = DevTable[tty->index];

 	i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_SUSPEND);
#ifdef IP2DEBUG_WRITE
	printk (KERN_DEBUG "IP2: stop tx\n" );
#endif
}

/******************************************************************************/
/* Device Ioctl Section                                                       */
/******************************************************************************/

static int ip2_tiocmget(struct tty_struct *tty, struct file *file)
{
	i2ChanStrPtr pCh = DevTable[tty->index];
#ifdef	ENABLE_DSSNOW
	wait_queue_t wait;
#endif

	if (pCh == NULL)
		return -ENODEV;

/*
	FIXME - the following code is causing a NULL pointer dereference in
	2.3.51 in an interrupt handler.  It's suppose to prompt the board
	to return the DSS signal status immediately.  Why doesn't it do
	the same thing in 2.2.14?
*/

/*	This thing is still busted in the 1.2.12 driver on 2.4.x
	and even hoses the serial console so the oops can be trapped.
		/\/\|=mhw=|\/\/			*/

#ifdef	ENABLE_DSSNOW
	i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DSS_NOW);

	init_waitqueue_entry(&wait, current);
	add_wait_queue(&pCh->dss_now_wait, &wait);
	set_current_state( TASK_INTERRUPTIBLE );

	serviceOutgoingFifo( pCh->pMyBord );

	schedule();

	set_current_state( TASK_RUNNING );
	remove_wait_queue(&pCh->dss_now_wait, &wait);

	if (signal_pending(current)) {
		return -EINTR;
	}
#endif
	return  ((pCh->dataSetOut & I2_RTS) ? TIOCM_RTS : 0)
	      | ((pCh->dataSetOut & I2_DTR) ? TIOCM_DTR : 0)
	      | ((pCh->dataSetIn  & I2_DCD) ? TIOCM_CAR : 0)
	      | ((pCh->dataSetIn  & I2_RI)  ? TIOCM_RNG : 0)
	      | ((pCh->dataSetIn  & I2_DSR) ? TIOCM_DSR : 0)
	      | ((pCh->dataSetIn  & I2_CTS) ? TIOCM_CTS : 0);
}

static int ip2_tiocmset(struct tty_struct *tty, struct file *file,
			unsigned int set, unsigned int clear)
{
	i2ChanStrPtr pCh = DevTable[tty->index];

	if (pCh == NULL)
		return -ENODEV;

	if (set & TIOCM_RTS) {
		i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_RTSUP);
		pCh->dataSetOut |= I2_RTS;
	}
	if (set & TIOCM_DTR) {
		i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DTRUP);
		pCh->dataSetOut |= I2_DTR;
	}

	if (clear & TIOCM_RTS) {
		i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_RTSDN);
		pCh->dataSetOut &= ~I2_RTS;
	}
	if (clear & TIOCM_DTR) {
		i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DTRDN);
		pCh->dataSetOut &= ~I2_DTR;
	}
	serviceOutgoingFifo( pCh->pMyBord );
	return 0;
}

/******************************************************************************/
/* Function:   ip2_ioctl()                                                    */
/* Parameters: Pointer to tty structure                                       */
/*             Pointer to file structure                                      */
/*             Command                                                        */
/*             Argument                                                       */
/* Returns:    Success or failure                                             */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static int
ip2_ioctl ( PTTY tty, struct file *pFile, UINT cmd, ULONG arg )
{
	wait_queue_t wait;
	i2ChanStrPtr pCh = DevTable[tty->index];
	i2eBordStrPtr pB;
	struct async_icount cprev, cnow;	/* kernel counter temps */
	struct serial_icounter_struct __user *p_cuser;
	int rc = 0;
	unsigned long flags;
	void __user *argp = (void __user *)arg;

	if ( pCh == NULL )
		return -ENODEV;

	pB = pCh->pMyBord;

	ip2trace (CHANN, ITRC_IOCTL, ITRC_ENTER, 2, cmd, arg );

#ifdef IP2DEBUG_IOCTL
	printk(KERN_DEBUG "IP2: ioctl cmd (%x), arg (%lx)\n", cmd, arg );
#endif

	switch(cmd) {
	case TIOCGSERIAL:

		ip2trace (CHANN, ITRC_IOCTL, 2, 1, rc );

		rc = get_serial_info(pCh, argp);
		if (rc)
			return rc;
		break;

	case TIOCSSERIAL:

		ip2trace (CHANN, ITRC_IOCTL, 3, 1, rc );

		rc = set_serial_info(pCh, argp);
		if (rc)
			return rc;
		break;

	case TCXONC:
		rc = tty_check_change(tty);
		if (rc)
			return rc;
		switch (arg) {
		case TCOOFF:
			//return  -ENOIOCTLCMD;
			break;
		case TCOON:
			//return  -ENOIOCTLCMD;
			break;
		case TCIOFF:
			if (STOP_CHAR(tty) != __DISABLED_CHAR) {
				i2QueueCommands( PTYPE_BYPASS, pCh, 100, 1,
						CMD_XMIT_NOW(STOP_CHAR(tty)));
			}
			break;
		case TCION:
			if (START_CHAR(tty) != __DISABLED_CHAR) {
				i2QueueCommands( PTYPE_BYPASS, pCh, 100, 1,
						CMD_XMIT_NOW(START_CHAR(tty)));
			}
			break;
		default:
			return -EINVAL;
		}
		return 0;

	case TCSBRK:   /* SVID version: non-zero arg --> no break */
		rc = tty_check_change(tty);

		ip2trace (CHANN, ITRC_IOCTL, 4, 1, rc );

		if (!rc) {
			ip2_wait_until_sent(tty,0);
			if (!arg) {
				i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_SEND_BRK(250));
				serviceOutgoingFifo( pCh->pMyBord );
			}
		}
		break;

	case TCSBRKP:  /* support for POSIX tcsendbreak() */
		rc = tty_check_change(tty);

		ip2trace (CHANN, ITRC_IOCTL, 5, 1, rc );

		if (!rc) {
			ip2_wait_until_sent(tty,0);
			i2QueueCommands(PTYPE_INLINE, pCh, 100, 1,
				CMD_SEND_BRK(arg ? arg*100 : 250));
			serviceOutgoingFifo ( pCh->pMyBord );	
		}
		break;

	case TIOCGSOFTCAR:

		ip2trace (CHANN, ITRC_IOCTL, 6, 1, rc );

			rc = put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
		if (rc)	
			return rc;
	break;

	case TIOCSSOFTCAR:

		ip2trace (CHANN, ITRC_IOCTL, 7, 1, rc );

		rc = get_user(arg,(unsigned long __user *) argp);
		if (rc) 
			return rc;
		tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL)
					 | (arg ? CLOCAL : 0));
		
		break;

	/*
	 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change - mask
	 * passed in arg for lines of interest (use |'ed TIOCM_RNG/DSR/CD/CTS
	 * for masking). Caller should use TIOCGICOUNT to see which one it was
	 */
	case TIOCMIWAIT:
		WRITE_LOCK_IRQSAVE(&pB->read_fifo_spinlock, flags);
		cprev = pCh->icount;	 /* note the counters on entry */
		WRITE_UNLOCK_IRQRESTORE(&pB->read_fifo_spinlock, flags);
		i2QueueCommands(PTYPE_BYPASS, pCh, 100, 4, 
						CMD_DCD_REP, CMD_CTS_REP, CMD_DSR_REP, CMD_RI_REP);
		init_waitqueue_entry(&wait, current);
		add_wait_queue(&pCh->delta_msr_wait, &wait);
		set_current_state( TASK_INTERRUPTIBLE );

		serviceOutgoingFifo( pCh->pMyBord );
		for(;;) {
			ip2trace (CHANN, ITRC_IOCTL, 10, 0 );

			schedule();

			ip2trace (CHANN, ITRC_IOCTL, 11, 0 );

			/* see if a signal did it */
			if (signal_pending(current)) {
				rc = -ERESTARTSYS;
				break;
			}
			WRITE_LOCK_IRQSAVE(&pB->read_fifo_spinlock, flags);
			cnow = pCh->icount; /* atomic copy */
			WRITE_UNLOCK_IRQRESTORE(&pB->read_fifo_spinlock, flags);
			if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
				cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
				rc =  -EIO; /* no change => rc */
				break;
			}
			if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
			    ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
			    ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
			    ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
				rc =  0;
				break;
			}
			cprev = cnow;
		}
		set_current_state( TASK_RUNNING );
		remove_wait_queue(&pCh->delta_msr_wait, &wait);

		i2QueueCommands(PTYPE_BYPASS, pCh, 100, 3, 
						 CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
		if ( ! (pCh->flags	& ASYNC_CHECK_CD)) {
			i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DCD_NREP);
		}
		serviceOutgoingFifo( pCh->pMyBord );
		return rc;
		break;

	/*
	 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
	 * Return: write counters to the user passed counter struct
	 * NB: both 1->0 and 0->1 transitions are counted except for RI where
	 * only 0->1 is counted. The controller is quite capable of counting
	 * both, but this done to preserve compatibility with the standard
	 * serial driver.
	 */
	case TIOCGICOUNT:
		ip2trace (CHANN, ITRC_IOCTL, 11, 1, rc );

		WRITE_LOCK_IRQSAVE(&pB->read_fifo_spinlock, flags);
		cnow = pCh->icount;
		WRITE_UNLOCK_IRQRESTORE(&pB->read_fifo_spinlock, flags);
		p_cuser = argp;
		rc = put_user(cnow.cts, &p_cuser->cts);
		rc = put_user(cnow.dsr, &p_cuser->dsr);
		rc = put_user(cnow.rng, &p_cuser->rng);
		rc = put_user(cnow.dcd, &p_cuser->dcd);
		rc = put_user(cnow.rx, &p_cuser->rx);
		rc = put_user(cnow.tx, &p_cuser->tx);
		rc = put_user(cnow.frame, &p_cuser->frame);
		rc = put_user(cnow.overrun, &p_cuser->overrun);
		rc = put_user(cnow.parity, &p_cuser->parity);
		rc = put_user(cnow.brk, &p_cuser->brk);
		rc = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
		break;

	/*
	 * The rest are not supported by this driver. By returning -ENOIOCTLCMD they
	 * will be passed to the line discipline for it to handle.
	 */
	case TIOCSERCONFIG:
	case TIOCSERGWILD:
	case TIOCSERGETLSR:
	case TIOCSERSWILD:
	case TIOCSERGSTRUCT:
	case TIOCSERGETMULTI:
	case TIOCSERSETMULTI:

	default:
		ip2trace (CHANN, ITRC_IOCTL, 12, 0 );

		rc =  -ENOIOCTLCMD;
		break;
	}

	ip2trace (CHANN, ITRC_IOCTL, ITRC_RETURN, 0 );

	return rc;
}

/******************************************************************************/
/* Function:   GetSerialInfo()                                                */
/* Parameters: Pointer to channel structure                                   */
/*             Pointer to old termios structure                               */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/* This is to support the setserial command, and requires processing of the   */
/* standard Linux serial structure.                                           */
/******************************************************************************/
static int
get_serial_info ( i2ChanStrPtr pCh, struct serial_struct __user *retinfo )
{
	struct serial_struct tmp;

	memset ( &tmp, 0, sizeof(tmp) );
	tmp.type = pCh->pMyBord->channelBtypes.bid_value[(pCh->port_index & (IP2_PORTS_PER_BOARD-1))/16];
	if (BID_HAS_654(tmp.type)) {
		tmp.type = PORT_16650;
	} else {
		tmp.type = PORT_CIRRUS;
	}
	tmp.line = pCh->port_index;
	tmp.port = pCh->pMyBord->i2eBase;
	tmp.irq  = ip2config.irq[pCh->port_index/64];
	tmp.flags = pCh->flags;
	tmp.baud_base = pCh->BaudBase;
	tmp.close_delay = pCh->ClosingDelay;
	tmp.closing_wait = pCh->ClosingWaitTime;
	tmp.custom_divisor = pCh->BaudDivisor;
   	return copy_to_user(retinfo,&tmp,sizeof(*retinfo));
}

/******************************************************************************/
/* Function:   SetSerialInfo()                                                */
/* Parameters: Pointer to channel structure                                   */
/*             Pointer to old termios structure                               */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/* This function provides support for setserial, which uses the TIOCSSERIAL   */
/* ioctl. Not all setserial parameters are relevant. If the user attempts to  */
/* change the IRQ, address or type of the port the ioctl fails.               */
/******************************************************************************/
static int
set_serial_info( i2ChanStrPtr pCh, struct serial_struct __user *new_info )
{
	struct serial_struct ns;
	int   old_flags, old_baud_divisor;

	if (copy_from_user(&ns, new_info, sizeof (ns)))
		return -EFAULT;

	/*
	 * We don't allow setserial to change IRQ, board address, type or baud
	 * base. Also line nunber as such is meaningless but we use it for our
	 * array index so it is fixed also.
	 */
	if ( (ns.irq  	    != ip2config.irq[pCh->port_index])
	    || ((int) ns.port      != ((int) (pCh->pMyBord->i2eBase)))
	    || (ns.baud_base != pCh->BaudBase)
	    || (ns.line      != pCh->port_index) ) {
		return -EINVAL;
	}

	old_flags = pCh->flags;
	old_baud_divisor = pCh->BaudDivisor;

	if ( !capable(CAP_SYS_ADMIN) ) {
		if ( ( ns.close_delay != pCh->ClosingDelay ) ||
		    ( (ns.flags & ~ASYNC_USR_MASK) !=
		      (pCh->flags & ~ASYNC_USR_MASK) ) ) {
			return -EPERM;
		}

		pCh->flags = (pCh->flags & ~ASYNC_USR_MASK) |
			       (ns.flags & ASYNC_USR_MASK);
		pCh->BaudDivisor = ns.custom_divisor;
	} else {
		pCh->flags = (pCh->flags & ~ASYNC_FLAGS) |
			       (ns.flags & ASYNC_FLAGS);
		pCh->BaudDivisor = ns.custom_divisor;
		pCh->ClosingDelay = ns.close_delay * HZ/100;
		pCh->ClosingWaitTime = ns.closing_wait * HZ/100;
	}

	if ( ( (old_flags & ASYNC_SPD_MASK) != (pCh->flags & ASYNC_SPD_MASK) )
	    || (old_baud_divisor != pCh->BaudDivisor) ) {
		// Invalidate speed and reset parameters
		set_params( pCh, NULL );
	}

	return 0;
}

/******************************************************************************/
/* Function:   ip2_set_termios()                                              */
/* Parameters: Pointer to tty structure                                       */
/*             Pointer to old termios structure                               */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static void
ip2_set_termios( PTTY tty, struct termios *old_termios )
{
	i2ChanStrPtr pCh = (i2ChanStrPtr)tty->driver_data;

#ifdef IP2DEBUG_IOCTL
	printk (KERN_DEBUG "IP2: set termios %p\n", old_termios );
#endif

	set_params( pCh, old_termios );
}

/******************************************************************************/
/* Function:   ip2_set_line_discipline()                                      */
/* Parameters: Pointer to tty structure                                       */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:  Does nothing                                                 */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static void
ip2_set_line_discipline ( PTTY tty )
{
#ifdef IP2DEBUG_IOCTL
	printk (KERN_DEBUG "IP2: set line discipline\n" );
#endif

	ip2trace (((i2ChanStrPtr)tty->driver_data)->port_index, ITRC_IOCTL, 16, 0 );

}

/******************************************************************************/
/* Function:   SetLine Characteristics()                                      */
/* Parameters: Pointer to channel structure                                   */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/* This routine is called to update the channel structure with the new line   */
/* characteristics, and send the appropriate commands to the board when they  */
/* change.                                                                    */
/******************************************************************************/
static void
set_params( i2ChanStrPtr pCh, struct termios *o_tios )
{
	tcflag_t cflag, iflag, lflag;
	char stop_char, start_char;
	struct termios dummy;

	lflag = pCh->pTTY->termios->c_lflag;
	cflag = pCh->pTTY->termios->c_cflag;
	iflag = pCh->pTTY->termios->c_iflag;

	if (o_tios == NULL) {
		dummy.c_lflag = ~lflag;
		dummy.c_cflag = ~cflag;
		dummy.c_iflag = ~iflag;
		o_tios = &dummy;
	}

	{
		switch ( cflag & CBAUD ) {
		case B0:
			i2QueueCommands( PTYPE_BYPASS, pCh, 100, 2, CMD_RTSDN, CMD_DTRDN);
			pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
			i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
			pCh->pTTY->termios->c_cflag |= (CBAUD & o_tios->c_cflag);
			goto service_it;
			break;
		case B38400:
			/*
			 * This is the speed that is overloaded with all the other high
			 * speeds, depending upon the flag settings.
			 */
			if ( ( pCh->flags & ASYNC_SPD_MASK ) == ASYNC_SPD_HI ) {
				pCh->speed = CBR_57600;
			} else if ( (pCh->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI ) {
				pCh->speed = CBR_115200;
			} else if ( (pCh->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST ) {
				pCh->speed = CBR_C1;
			} else {
				pCh->speed = CBR_38400;
			}
			break;
		case B50:      pCh->speed = CBR_50;      break;
		case B75:      pCh->speed = CBR_75;      break;
		case B110:     pCh->speed = CBR_110;     break;
		case B134:     pCh->speed = CBR_134;     break;
		case B150:     pCh->speed = CBR_150;     break;
		case B200:     pCh->speed = CBR_200;     break;
		case B300:     pCh->speed = CBR_300;     break;
		case B600:     pCh->speed = CBR_600;     break;
		case B1200:    pCh->speed = CBR_1200;    break;
		case B1800:    pCh->speed = CBR_1800;    break;
		case B2400:    pCh->speed = CBR_2400;    break;
		case B4800:    pCh->speed = CBR_4800;    break;
		case B9600:    pCh->speed = CBR_9600;    break;
		case B19200:   pCh->speed = CBR_19200;   break;
		case B57600:   pCh->speed = CBR_57600;   break;
		case B115200:  pCh->speed = CBR_115200;  break;
		case B153600:  pCh->speed = CBR_153600;  break;
		case B230400:  pCh->speed = CBR_230400;  break;
		case B307200:  pCh->speed = CBR_307200;  break;
		case B460800:  pCh->speed = CBR_460800;  break;
		case B921600:  pCh->speed = CBR_921600;  break;
		default:       pCh->speed = CBR_9600;    break;
		}
		if ( pCh->speed == CBR_C1 ) {
			// Process the custom speed parameters.
			int bps = pCh->BaudBase / pCh->BaudDivisor;
			if ( bps == 921600 ) {
				pCh->speed = CBR_921600;
			} else {
				bps = bps/10;
				i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_BAUD_DEF1(bps) );
			}
		}
		i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_SETBAUD(pCh->speed));
		
		i2QueueCommands ( PTYPE_INLINE, pCh, 100, 2, CMD_DTRUP, CMD_RTSUP);
		pCh->dataSetOut |= (I2_DTR | I2_RTS);
	}
	if ( (CSTOPB & cflag) ^ (CSTOPB & o_tios->c_cflag)) 
	{
		i2QueueCommands ( PTYPE_INLINE, pCh, 100, 1, 
			CMD_SETSTOP( ( cflag & CSTOPB ) ? CST_2 : CST_1));
	}
	if (((PARENB|PARODD) & cflag) ^ ((PARENB|PARODD) & o_tios->c_cflag)) 
	{
		i2QueueCommands ( PTYPE_INLINE, pCh, 100, 1,
			CMD_SETPAR( 
				(cflag & PARENB ?  (cflag & PARODD ? CSP_OD : CSP_EV) : CSP_NP)
			)
		);
	}
	/* byte size and parity */
	if ( (CSIZE & cflag)^(CSIZE & o_tios->c_cflag)) 
	{
		int datasize;
		switch ( cflag & CSIZE ) {
		case CS5: datasize = CSZ_5; break;
		case CS6: datasize = CSZ_6; break;
		case CS7: datasize = CSZ_7; break;
		case CS8: datasize = CSZ_8; break;
		default:  datasize = CSZ_5; break;	/* as per serial.c */
		}
		i2QueueCommands ( PTYPE_INLINE, pCh, 100, 1, CMD_SETBITS(datasize) );
	}
	/* Process CTS flow control flag setting */
	if ( (cflag & CRTSCTS) ) {
		i2QueueCommands(PTYPE_INLINE, pCh, 100,
						2, CMD_CTSFL_ENAB, CMD_RTSFL_ENAB);
	} else {
		i2QueueCommands(PTYPE_INLINE, pCh, 100,
						2, CMD_CTSFL_DSAB, CMD_RTSFL_DSAB);
	}
	//
	// Process XON/XOFF flow control flags settings
	//
	stop_char = STOP_CHAR(pCh->pTTY);
	start_char = START_CHAR(pCh->pTTY);

	//////////// can't be \000
	if (stop_char == __DISABLED_CHAR ) 
	{
		stop_char = ~__DISABLED_CHAR; 
	}
	if (start_char == __DISABLED_CHAR ) 
	{
		start_char = ~__DISABLED_CHAR;
	}
	/////////////////////////////////

	if ( o_tios->c_cc[VSTART] != start_char ) 
	{
		i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DEF_IXON(start_char));
		i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DEF_OXON(start_char));
	}
	if ( o_tios->c_cc[VSTOP] != stop_char ) 
	{
		 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DEF_IXOFF(stop_char));
		 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DEF_OXOFF(stop_char));
	}
	if (stop_char == __DISABLED_CHAR ) 
	{
		stop_char = ~__DISABLED_CHAR;  //TEST123
		goto no_xoff;
	}
	if ((iflag & (IXOFF))^(o_tios->c_iflag & (IXOFF))) 
	{
		if ( iflag & IXOFF ) {	// Enable XOFF output flow control
			i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_OXON_OPT(COX_XON));
		} else {	// Disable XOFF output flow control
no_xoff:
			i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_OXON_OPT(COX_NONE));
		}
	}
	if (start_char == __DISABLED_CHAR ) 
	{
		goto no_xon;
	}
	if ((iflag & (IXON|IXANY)) ^ (o_tios->c_iflag & (IXON|IXANY))) 
	{
		if ( iflag & IXON ) {
			if ( iflag & IXANY ) { // Enable XON/XANY output flow control
				i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_IXON_OPT(CIX_XANY));
			} else { // Enable XON output flow control
				i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_IXON_OPT(CIX_XON));
			}
		} else { // Disable XON output flow control
no_xon:
			i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_IXON_OPT(CIX_NONE));
		}
	}
	if ( (iflag & ISTRIP) ^ ( o_tios->c_iflag & (ISTRIP)) ) 
	{
		i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, 
				CMD_ISTRIP_OPT((iflag & ISTRIP ? 1 : 0)));
	}
	if ( (iflag & INPCK) ^ ( o_tios->c_iflag & (INPCK)) ) 
	{
		i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, 
				CMD_PARCHK((iflag & INPCK) ? CPK_ENAB : CPK_DSAB));
	}

	if ( (iflag & (IGNBRK|PARMRK|BRKINT|IGNPAR)) 
			^	( o_tios->c_iflag & (IGNBRK|PARMRK|BRKINT|IGNPAR)) ) 
	{
		char brkrpt = 0;
		char parrpt = 0;

		if ( iflag & IGNBRK ) { /* Ignore breaks altogether */
			/* Ignore breaks altogether */
			i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_BRK_NREP);
		} else {
			if ( iflag & BRKINT ) {
				if ( iflag & PARMRK ) {
					brkrpt = 0x0a;	// exception an inline triple
				} else {
					brkrpt = 0x1a;	// exception and NULL
				}
				brkrpt |= 0x04;	// flush input
			} else {
				if ( iflag & PARMRK ) {
					brkrpt = 0x0b;	//POSIX triple \0377 \0 \0
				} else {
					brkrpt = 0x01;	// Null only
				}
			}
			i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_BRK_REP(brkrpt));
		} 

		if (iflag & IGNPAR) {
			parrpt = 0x20;
													/* would be 2 for not cirrus bug */
													/* would be 0x20 cept for cirrus bug */
		} else {
			if ( iflag & PARMRK ) {
				/*
				 * Replace error characters with 3-byte sequence (\0377,\0,char)
				 */
				parrpt = 0x04 ;
				i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_ISTRIP_OPT((char)0));
			} else {
				parrpt = 0x03;
			} 
		}
		i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_SET_ERROR(parrpt));
	}
	if (cflag & CLOCAL) {
		// Status reporting fails for DCD if this is off
		i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DCD_NREP);
		pCh->flags &= ~ASYNC_CHECK_CD;
	} else {
		i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DCD_REP);
		pCh->flags	|= ASYNC_CHECK_CD;
	}

service_it:
	i2DrainOutput( pCh, 100 );		
}

/******************************************************************************/
/* IPL Device Section                                                         */
/******************************************************************************/

/******************************************************************************/
/* Function:   ip2_ipl_read()                                                  */
/* Parameters: Pointer to device inode                                        */
/*             Pointer to file structure                                      */
/*             Pointer to data                                                */
/*             Number of bytes to read                                        */
/* Returns:    Success or failure                                             */
/*                                                                            */
/* Description:   Ugly                                                        */
/*                                                                            */
/*                                                                            */
/******************************************************************************/

static 
ssize_t
ip2_ipl_read(struct file *pFile, char __user *pData, size_t count, loff_t *off )
{
	unsigned int minor = iminor(pFile->f_dentry->d_inode);
	int rc = 0;

#ifdef IP2DEBUG_IPL
	printk (KERN_DEBUG "IP2IPL: read %p, %d bytes\n", pData, count );
#endif

	switch( minor ) {
	case 0:	    // IPL device
		rc = -EINVAL;
		break;
	case 1:	    // Status dump
		rc = -EINVAL;
		break;
	case 2:	    // Ping device
		rc = -EINVAL;
		break;
	case 3:	    // Trace device
		rc = DumpTraceBuffer ( pData, count );
		break;
	case 4:	    // Trace device
		rc = DumpFifoBuffer ( pData, count );
		break;
	default:
		rc = -ENODEV;
		break;
	}
	return rc;
}

static int
DumpFifoBuffer ( char __user *pData, int count )
{
#ifdef DEBUG_FIFO
	int rc;
	rc = copy_to_user(pData, DBGBuf, count);

	printk(KERN_DEBUG "Last index %d\n", I );

	return count;
#endif	/* DEBUG_FIFO */
	return 0;
}

static int
DumpTraceBuffer ( char __user *pData, int count )
{
#ifdef IP2DEBUG_TRACE
	int rc;
	int dumpcount;
	int chunk;
	int *pIndex = (int __user *)pData;

	if ( count < (sizeof(int) * 6) ) {
		return -EIO;
	}
	rc = put_user(tracewrap, pIndex );
	rc = put_user(TRACEMAX, ++pIndex );
	rc = put_user(tracestrip, ++pIndex );
	rc = put_user(tracestuff, ++pIndex );
	pData += sizeof(int) * 6;
	count -= sizeof(int) * 6;

	dumpcount = tracestuff - tracestrip;
	if ( dumpcount < 0 ) {
		dumpcount += TRACEMAX;
	}
	if ( dumpcount > count ) {
		dumpcount = count;
	}
	chunk = TRACEMAX - tracestrip;
	if ( dumpcount > chunk ) {
		rc = copy_to_user(pData, &tracebuf[tracestrip],
			      chunk * sizeof(tracebuf[0]) );
		pData += chunk * sizeof(tracebuf[0]);
		tracestrip = 0;
		chunk = dumpcount - chunk;
	} else {
		chunk = dumpcount;
	}
	rc = copy_to_user(pData, &tracebuf[tracestrip],
		      chunk * sizeof(tracebuf[0]) );
	tracestrip += chunk;
	tracewrap = 0;

	rc = put_user(tracestrip, ++pIndex );
	rc = put_user(tracestuff, ++pIndex );

	return dumpcount;
#else
	return 0;
#endif
}

/******************************************************************************/
/* Function:   ip2_ipl_write()                                                 */
/* Parameters:                                                                */
/*             Pointer to file structure                                      */
/*             Pointer to data                                                */
/*             Number of bytes to write                                       */
/* Returns:    Success or failure                                             */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static ssize_t
ip2_ipl_write(struct file *pFile, const char __user *pData, size_t count, loff_t *off)
{
#ifdef IP2DEBUG_IPL
	printk (KERN_DEBUG "IP2IPL: write %p, %d bytes\n", pData, count );
#endif
	return 0;
}

/******************************************************************************/
/* Function:   ip2_ipl_ioctl()                                                */
/* Parameters: Pointer to device inode                                        */
/*             Pointer to file structure                                      */
/*             Command                                                        */
/*             Argument                                                       */
/* Returns:    Success or failure                                             */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static int
ip2_ipl_ioctl ( struct inode *pInode, struct file *pFile, UINT cmd, ULONG arg )
{
	unsigned int iplminor = iminor(pInode);
	int rc = 0;
	void __user *argp = (void __user *)arg;
	ULONG __user *pIndex = argp;
	i2eBordStrPtr pB = i2BoardPtrTable[iplminor / 4];
	i2ChanStrPtr pCh;

#ifdef IP2DEBUG_IPL
	printk (KERN_DEBUG "IP2IPL: ioctl cmd %d, arg %ld\n", cmd, arg );
#endif

	switch ( iplminor ) {
	case 0:	    // IPL device
		rc = -EINVAL;
		break;
	case 1:	    // Status dump
	case 5:
	case 9:
	case 13:
		switch ( cmd ) {
		case 64:	/* Driver - ip2stat */
			rc = put_user(ip2_tty_driver->refcount, pIndex++ );
			rc = put_user(irq_counter, pIndex++  );
			rc = put_user(bh_counter, pIndex++  );
			break;

		case 65:	/* Board  - ip2stat */
			if ( pB ) {
				rc = copy_to_user(argp, pB, sizeof(i2eBordStr));
				rc = put_user(INB(pB->i2eStatus),
					(ULONG __user *)(arg + (ULONG)(&pB->i2eStatus) - (ULONG)pB ) );
			} else {
				rc = -ENODEV;
			}
			break;

		default:
			if (cmd < IP2_MAX_PORTS) {
				pCh = DevTable[cmd];
				if ( pCh )
				{
					rc = copy_to_user(argp, pCh, sizeof(i2ChanStr));
				} else {
					rc = -ENODEV;
				}
			} else {
				rc = -EINVAL;
			}
		}
		break;

	case 2:	    // Ping device
		rc = -EINVAL;
		break;
	case 3:	    // Trace device
		/*
		 * akpm: This used to write a whole bunch of function addresses
		 * to userspace, which generated lots of put_user() warnings.
		 * I killed it all.  Just return "success" and don't do
		 * anything.
		 */
		if (cmd == 1)
			rc = 0;
		else
			rc = -EINVAL;
		break;

	default:
		rc = -ENODEV;
		break;
	}
	return rc;
}

/******************************************************************************/
/* Function:   ip2_ipl_open()                                                 */
/* Parameters: Pointer to device inode                                        */
/*             Pointer to file structure                                      */
/* Returns:    Success or failure                                             */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
static int
ip2_ipl_open( struct inode *pInode, struct file *pFile )
{
	unsigned int iplminor = iminor(pInode);
	i2eBordStrPtr pB;
	i2ChanStrPtr  pCh;

#ifdef IP2DEBUG_IPL
	printk (KERN_DEBUG "IP2IPL: open\n" );
#endif

	switch(iplminor) {
	// These are the IPL devices
	case 0:
	case 4:
	case 8:
	case 12:
		break;

	// These are the status devices
	case 1:
	case 5:
	case 9:
	case 13:
		break;

	// These are the debug devices
	case 2:
	case 6:
	case 10:
	case 14:
		pB = i2BoardPtrTable[iplminor / 4];
		pCh = (i2ChanStrPtr) pB->i2eChannelPtr;
		break;

	// This is the trace device
	case 3:
		break;
	}
	return 0;
}
/******************************************************************************/
/* Function:   ip2_read_procmem                                               */
/* Parameters:                                                                */
/*                                                                            */
/* Returns: Length of output                                                  */
/*                                                                            */
/* Description:                                                               */
/*   Supplies some driver operating parameters                                */
/*	Not real useful unless your debugging the fifo							  */
/*                                                                            */
/******************************************************************************/

#define LIMIT  (PAGE_SIZE - 120)

static int
ip2_read_procmem(char *buf, char **start, off_t offset, int len)
{
	i2eBordStrPtr  pB;
	i2ChanStrPtr  pCh;
	PTTY tty;
	int i;

	len = 0;

#define FMTLINE	"%3d: 0x%08x 0x%08x 0%011o 0%011o\n"
#define FMTLIN2	"     0x%04x 0x%04x tx flow 0x%x\n"
#define FMTLIN3	"     0x%04x 0x%04x rc flow\n"

	len += sprintf(buf+len,"\n");

	for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
		pB = i2BoardPtrTable[i];
		if ( pB ) {
			len += sprintf(buf+len,"board %d:\n",i);
			len += sprintf(buf+len,"\tFifo rem: %d mty: %x outM %x\n",
				pB->i2eFifoRemains,pB->i2eWaitingForEmptyFifo,pB->i2eOutMailWaiting);
		}
	}

	len += sprintf(buf+len,"#: tty flags, port flags,     cflags,     iflags\n");
	for (i=0; i < IP2_MAX_PORTS; i++) {
		if (len > LIMIT)
			break;
		pCh = DevTable[i];
		if (pCh) {
			tty = pCh->pTTY;
			if (tty && tty->count) {
				len += sprintf(buf+len,FMTLINE,i,(int)tty->flags,pCh->flags,
									tty->termios->c_cflag,tty->termios->c_iflag);

				len += sprintf(buf+len,FMTLIN2,
						pCh->outfl.asof,pCh->outfl.room,pCh->channelNeeds);
				len += sprintf(buf+len,FMTLIN3,pCh->infl.asof,pCh->infl.room);
			}
		}
	}
	return len;
}

/*
 * This is the handler for /proc/tty/driver/ip2
 *
 * This stretch of code has been largely plagerized from at least three
 * different sources including ip2mkdev.c and a couple of other drivers.
 * The bugs are all mine.  :-)	=mhw=
 */
static int ip2_read_proc(char *page, char **start, off_t off,
				int count, int *eof, void *data)
{
	int	i, j, box;
	int	len = 0;
	int	boxes = 0;
	int	ports = 0;
	int	tports = 0;
	off_t	begin = 0;
	i2eBordStrPtr  pB;

	len += sprintf(page, "ip2info: 1.0 driver: %s\n", pcVersion );
	len += sprintf(page+len, "Driver: SMajor=%d CMajor=%d IMajor=%d MaxBoards=%d MaxBoxes=%d MaxPorts=%d\n",
			IP2_TTY_MAJOR, IP2_CALLOUT_MAJOR, IP2_IPL_MAJOR,
			IP2_MAX_BOARDS, ABS_MAX_BOXES, ABS_BIGGEST_BOX);

	for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
		/* This need to be reset for a board by board count... */
		boxes = 0;
		pB = i2BoardPtrTable[i];
		if( pB ) {
			switch( pB->i2ePom.e.porID & ~POR_ID_RESERVED ) 
			{
			case POR_ID_FIIEX:
				len += sprintf( page+len, "Board %d: EX ports=", i );
				for( box = 0; box < ABS_MAX_BOXES; ++box )
				{
					ports = 0;

					if( pB->i2eChannelMap[box] != 0 ) ++boxes;
					for( j = 0; j < ABS_BIGGEST_BOX; ++j ) 
					{
						if( pB->i2eChannelMap[box] & 1<< j ) {
							++ports;
						}
					}
					len += sprintf( page+len, "%d,", ports );
					tports += ports;
				}

				--len;	/* Backup over that last comma */

				len += sprintf( page+len, " boxes=%d width=%d", boxes, pB->i2eDataWidth16 ? 16 : 8 );
				break;

			case POR_ID_II_4:
				len += sprintf(page+len, "Board %d: ISA-4 ports=4 boxes=1", i );
				tports = ports = 4;
				break;

			case POR_ID_II_8:
				len += sprintf(page+len, "Board %d: ISA-8-std ports=8 boxes=1", i );
				tports = ports = 8;
				break;

			case POR_ID_II_8R:
				len += sprintf(page+len, "Board %d: ISA-8-RJ11 ports=8 boxes=1", i );
				tports = ports = 8;
				break;

			default:
				len += sprintf(page+len, "Board %d: unknown", i );
				/* Don't try and probe for minor numbers */
				tports = ports = 0;
			}

		} else {
			/* Don't try and probe for minor numbers */
			len += sprintf(page+len, "Board %d: vacant", i );
			tports = ports = 0;
		}

		if( tports ) {
			len += sprintf(page+len, " minors=" );

			for ( box = 0; box < ABS_MAX_BOXES; ++box )
			{
				for ( j = 0; j < ABS_BIGGEST_BOX; ++j )
				{
					if ( pB->i2eChannelMap[box] & (1 << j) )
					{
						len += sprintf (page+len,"%d,",
							j + ABS_BIGGEST_BOX *
							(box+i*ABS_MAX_BOXES));
					}
				}
			}

			page[ len - 1 ] = '\n';	/* Overwrite that last comma */
		} else {
			len += sprintf (page+len,"\n" );
		}

		if (len+begin > off+count)
			break;
		if (len+begin < off) {
			begin += len;
			len = 0;
		}
	}

	if (i >= IP2_MAX_BOARDS)
		*eof = 1;
	if (off >= len+begin)
		return 0;

	*start = page + (off-begin);
	return ((count < begin+len-off) ? count : begin+len-off);
 }
 
/******************************************************************************/
/* Function:   ip2trace()                                                     */
/* Parameters: Value to add to trace buffer                                   */
/* Returns:    Nothing                                                        */
/*                                                                            */
/* Description:                                                               */
/*                                                                            */
/*                                                                            */
/******************************************************************************/
#ifdef IP2DEBUG_TRACE
void
ip2trace (unsigned short pn, unsigned char cat, unsigned char label, unsigned long codes, ...)
{
	long flags;
	unsigned long *pCode = &codes;
	union ip2breadcrumb bc;
	i2ChanStrPtr  pCh;


	tracebuf[tracestuff++] = jiffies;
	if ( tracestuff == TRACEMAX ) {
		tracestuff = 0;
	}
	if ( tracestuff == tracestrip ) {
		if ( ++tracestrip == TRACEMAX ) {
			tracestrip = 0;
		}
		++tracewrap;
	}

	bc.hdr.port  = 0xff & pn;
	bc.hdr.cat   = cat;
	bc.hdr.codes = (unsigned char)( codes & 0xff );
	bc.hdr.label = label;
	tracebuf[tracestuff++] = bc.value;

	for (;;) {
		if ( tracestuff == TRACEMAX ) {
			tracestuff = 0;
		}
		if ( tracestuff == tracestrip ) {
			if ( ++tracestrip == TRACEMAX ) {
				tracestrip = 0;
			}
			++tracewrap;
		}

		if ( !codes-- )
			break;

		tracebuf[tracestuff++] = *++pCode;
	}
}
#endif


MODULE_LICENSE("GPL");