aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/char/cyclades.c
blob: 29b5375feeba8c677cc39a27dcc49174cf8809e8 (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
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
#undef	BLOCKMOVE
#define	Z_WAKE
#undef	Z_EXT_CHARS_IN_BUFFER

/*
 *  linux/drivers/char/cyclades.c
 *
 * This file contains the driver for the Cyclades async multiport
 * serial boards.
 *
 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
 * Currently maintained by Cyclades team <async@cyclades.com>.
 *
 * For Technical support and installation problems, please send e-mail
 * to support@cyclades.com.
 *
 * Much of the design and some of the code came from serial.c
 * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
 * and then fixed as suggested by Michael K. Johnson 12/12/92.
 *
 * This version supports shared IRQ's (only for PCI boards).
 *
 * $Log: cyclades.c,v $
 * Prevent users from opening non-existing Z ports.
 *
 * Revision 2.3.2.8   2000/07/06 18:14:16 ivan
 * Fixed the PCI detection function to work properly on Alpha systems.
 * Implemented support for TIOCSERGETLSR ioctl.
 * Implemented full support for non-standard baud rates.
 *
 * Revision 2.3.2.7   2000/06/01 18:26:34 ivan
 * Request PLX I/O region, although driver doesn't use it, to avoid
 * problems with other drivers accessing it.
 * Removed count for on-board buffer characters in cy_chars_in_buffer
 * (Cyclades-Z only).
 *
 * Revision 2.3.2.6   2000/05/05 13:56:05 ivan
 * Driver now reports physical instead of virtual memory addresses.
 * Masks were added to some Cyclades-Z read accesses.
 * Implemented workaround for PLX9050 bug that would cause a system lockup
 * in certain systems, depending on the MMIO addresses allocated to the
 * board.
 * Changed the Tx interrupt programming in the CD1400 chips to boost up
 * performance (Cyclom-Y only).
 * Code is now compliant with the new module interface (module_[init|exit]).
 * Make use of the PCI helper functions to access PCI resources.
 * Did some code "housekeeping".
 *
 * Revision 2.3.2.5   2000/01/19 14:35:33 ivan
 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
 *
 * Revision 2.3.2.4   2000/01/17 09:19:40 ivan
 * Fixed SMP locking in Cyclom-Y interrupt handler.
 *
 * Revision 2.3.2.3   1999/12/28 12:11:39 ivan
 * Added a new cyclades_card field called nports to allow the driver to
 * know the exact number of ports found by the Z firmware after its load;
 * RX buffer contention prevention logic on interrupt op mode revisited
 * (Cyclades-Z only);
 * Revisited printk's for Z debug;
 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
 *
 * Revision 2.3.2.2   1999/10/01 11:27:43 ivan
 * Fixed bug in cyz_poll that would make all ports but port 0 
 * unable to transmit/receive data (Cyclades-Z only);
 * Implemented logic to prevent the RX buffer from being stuck with data
 * due to a driver / firmware race condition in interrupt op mode
 * (Cyclades-Z only);
 * Fixed bug in block_til_ready logic that would lead to a system crash;
 * Revisited cy_close spinlock usage;
 *
 * Revision 2.3.2.1   1999/09/28 11:01:22 ivan
 * Revisited CONFIG_PCI conditional compilation for PCI board support;
 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
 * Removed CTS handling from the driver -- this is now completely handled
 * by the firmware (Cyclades-Z only);
 * Flush RX on-board buffers on a port open (Cyclades-Z only);
 * Fixed handling of ASYNC_SPD_* TTY flags;
 * Module unload now unmaps all memory area allocated by ioremap;
 *
 * Revision 2.3.1.1   1999/07/15 16:45:53 ivan
 * Removed CY_PROC conditional compilation;
 * Implemented SMP-awareness for the driver;
 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off] 
 * functions;
 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
 * (irq=NN) as parameters (only for ISA boards);
 * Fixed bug in set_line_char that would prevent the Cyclades-Z 
 * ports from being configured at speeds above 115.2Kbps;
 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
 * switching from working properly;
 * The driver now only prints IRQ info for the Cyclades-Z if it's 
 * configured to work in interrupt mode;
 *
 * Revision 2.2.2.3   1999/06/28 11:13:29 ivan
 * Added support for interrupt mode operation for the Z cards;
 * Removed the driver inactivity control for the Z;
 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when 
 * the Z firmware is not loaded yet;
 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of 
 * same functionality;
 * Implemented workaround for IRQ setting loss on the PCI configuration 
 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
 *
 * Revision 2.2.2.2  1999/05/14 17:18:15 ivan
 * /proc entry location changed to /proc/tty/driver/cyclades;
 * Added support to shared IRQ's (only for PCI boards);
 * Added support for Cobalt Qube2 systems;
 * IRQ [de]allocation scheme revisited;
 * BREAK implementation changed in order to make use of the 'break_ctl'
 * TTY facility;
 * Fixed typo in TTY structure field 'driver_name';
 * Included a PCI bridge reset and EEPROM reload in the board 
 * initialization code (for both Y and Z series).
 *
 * Revision 2.2.2.1  1999/04/08 16:17:43 ivan
 * Fixed a bug in cy_wait_until_sent that was preventing the port to be 
 * closed properly after a SIGINT;
 * Module usage counter scheme revisited;
 * Added support to the upcoming Y PCI boards (i.e., support to additional
 * PCI Device ID's).
 * 
 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
 * Removed all unnecessary page-alignement operations in ioremap calls
 * (ioremap is currently safe for these operations).
 *
 * Revision 2.2.1.9  1998/12/30 18:18:30 ivan
 * Changed access to PLX PCI bridge registers from I/O to MMIO, in 
 * order to make PLX9050-based boards work with certain motherboards.
 *
 * Revision 2.2.1.8  1998/11/13 12:46:20 ivan
 * cy_close function now resets (correctly) the tty->closing flag;
 * JIFFIES_DIFF macro fixed.
 *
 * Revision 2.2.1.7  1998/09/03 12:07:28 ivan
 * Fixed bug in cy_close function, which was not informing HW of
 * which port should have the reception disabled before doing so;
 * fixed Cyclom-8YoP hardware detection bug.
 *
 * Revision 2.2.1.6  1998/08/20 17:15:39 ivan
 * Fixed bug in cy_close function, which causes malfunction
 * of one of the first 4 ports when a higher port is closed
 * (Cyclom-Y only).
 *
 * Revision 2.2.1.5  1998/08/10 18:10:28 ivan
 * Fixed Cyclom-4Yo hardware detection bug.
 *
 * Revision 2.2.1.4  1998/08/04 11:02:50 ivan
 * /proc/cyclades implementation with great collaboration of 
 * Marc Lewis <marc@blarg.net>;
 * cyy_interrupt was changed to avoid occurrence of kernel oopses
 * during PPP operation.
 *
 * Revision 2.2.1.3  1998/06/01 12:09:10 ivan
 * General code review in order to comply with 2.1 kernel standards;
 * data loss prevention for slow devices revisited (cy_wait_until_sent
 * was created);
 * removed conditional compilation for new/old PCI structure support 
 * (now the driver only supports the new PCI structure).
 *
 * Revision 2.2.1.1  1998/03/19 16:43:12 ivan
 * added conditional compilation for new/old PCI structure support;
 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
 *
 * Revision 2.1.1.3  1998/03/16 18:01:12 ivan
 * cleaned up the data loss fix;
 * fixed XON/XOFF handling once more (Cyclades-Z);
 * general review of the driver routines;
 * introduction of a mechanism to prevent data loss with slow 
 * printers, by forcing a delay before closing the port.
 *
 * Revision 2.1.1.2  1998/02/17 16:50:00 ivan
 * fixed detection/handling of new CD1400 in Ye boards;
 * fixed XON/XOFF handling (Cyclades-Z);
 * fixed data loss caused by a premature port close;
 * introduction of a flag that holds the CD1400 version ID per port
 * (used by the CYGETCD1400VER new ioctl).
 *
 * Revision 2.1.1.1  1997/12/03 17:31:19 ivan
 * Code review for the module cleanup routine;
 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
 * includes anonymous changes regarding signal_pending.
 * 
 * Revision 2.1  1997/11/01 17:42:41 ivan
 * Changes in the driver to support Alpha systems (except 8Zo V_1);
 * BREAK fix for the Cyclades-Z boards;
 * driver inactivity control by FW implemented;
 * introduction of flag that allows driver to take advantage of 
 * a special CD1400 feature related to HW flow control;
 * added support for the CD1400  rev. J (Cyclom-Y boards);
 * introduction of ioctls to:
 *  - control the rtsdtr_inv flag (Cyclom-Y);
 *  - control the rflow flag (Cyclom-Y);
 *  - adjust the polling interval (Cyclades-Z);
 *
 * Revision 1.36.4.33  1997/06/27 19:00:00  ivan
 * Fixes related to kernel version conditional 
 * compilation.
 *  
 * Revision 1.36.4.32  1997/06/14 19:30:00  ivan
 * Compatibility issues between kernels 2.0.x and 
 * 2.1.x (mainly related to clear_bit function).
 *  
 * Revision 1.36.4.31  1997/06/03 15:30:00  ivan
 * Changes to define the memory window according to the 
 * board type.
 *  
 * Revision 1.36.4.30  1997/05/16 15:30:00  daniel
 * Changes to support new cycladesZ boards.
 *
 * Revision 1.36.4.29  1997/05/12 11:30:00  daniel
 * Merge of Bentson's and Daniel's version 1.36.4.28.
 * Corrects bug in cy_detect_pci: check if there are more
 * ports than the number of static structs allocated.
 * Warning message during initialization if this driver is
 * used with the new generation of cycladesZ boards.  Those
 * will be supported only in next release of the driver.
 * Corrects bug in cy_detect_pci and cy_detect_isa that
 * returned wrong number of VALID boards, when a cyclomY
 * was found with no serial modules connected.
 * Changes to use current (2.1.x) kernel subroutine names
 * and created macros for compilation with 2.0.x kernel,
 * instead of the other way around.
 *
 * Revision 1.36.4.28  1997/05/?? ??:00:00  bentson
 * Change queue_task_irq_off to queue_task_irq.
 * The inline function queue_task_irq_off (tqueue.h)
 * was removed from latest releases of 2.1.x kernel.
 * Use of macro __init to mark the initialization
 * routines, so memory can be reused.
 * Also incorporate implementation of critical region
 * in function cleanup_module() created by anonymous
 * linuxer.
 *
 * Revision 1.36.4.28  1997/04/25 16:00:00  daniel
 * Change to support new firmware that solves DCD problem:
 * application could fail to receive SIGHUP signal when DCD
 * varying too fast.
 *
 * Revision 1.36.4.27  1997/03/26 10:30:00  daniel
 * Changed for support linux versions 2.1.X.
 * Backward compatible with linux versions 2.0.X.
 * Corrected illegal use of filler field in
 * CH_CTRL struct.
 * Deleted some debug messages.
 *
 * Revision 1.36.4.26  1997/02/27 12:00:00  daniel
 * Included check for NULL tty pointer in cyz_poll.
 *
 * Revision 1.36.4.25  1997/02/26 16:28:30  bentson
 * Bill Foster at Blarg! Online services noticed that
 * some of the switch elements of -Z modem control
 * lacked a closing "break;"
 *
 * Revision 1.36.4.24  1997/02/24 11:00:00  daniel
 * Changed low water threshold for buffer xmit_buf
 *
 * Revision 1.36.4.23  1996/12/02 21:50:16  bentson
 * Marcio provided fix to modem status fetch for -Z
 *
 * Revision 1.36.4.22  1996/10/28 22:41:17  bentson
 * improve mapping of -Z control page (thanks to Steve
 * Price <stevep@fa.tdktca.com> for help on this)
 *
 * Revision 1.36.4.21  1996/09/10 17:00:10  bentson
 * shift from CPU-bound to memcopy in cyz_polling operation
 *
 * Revision 1.36.4.20  1996/09/09 18:30:32  Bentson
 * Added support to set and report higher speeds.
 *
 * Revision 1.36.4.19c  1996/08/09 10:00:00  Marcio Saito
 * Some fixes in the HW flow control for the BETA release.
 * Don't try to register the IRQ.
 *
 * Revision 1.36.4.19  1996/08/08 16:23:18  Bentson
 * make sure "cyc" appears in all kernel messages; all soft interrupts
 * handled by same routine; recognize out-of-band reception; comment
 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
 * fix race condition in -Z buffer management; only -Y needs to explicitly
 * flush chars; tidy up some startup messages;
 *
 * Revision 1.36.4.18  1996/07/25 18:57:31  bentson
 * shift MOD_INC_USE_COUNT location to match
 * serial.c; purge some diagnostic messages;
 *
 * Revision 1.36.4.17  1996/07/25 18:01:08  bentson
 * enable modem status messages and fetch & process them; note
 * time of last activity type for each port; set_line_char now
 * supports more than line 0 and treats 0 baud correctly;
 * get_modem_info senses rs_status;
 *
 * Revision 1.36.4.16  1996/07/20 08:43:15  bentson
 * barely works--now's time to turn on
 * more features 'til it breaks
 *
 * Revision 1.36.4.15  1996/07/19 22:30:06  bentson
 * check more -Z board status; shorten boot message
 *
 * Revision 1.36.4.14  1996/07/19 22:20:37  bentson
 * fix reference to ch_ctrl in startup; verify return
 * values from cyz_issue_cmd and cyz_update_channel;
 * more stuff to get modem control correct;
 *
 * Revision 1.36.4.13  1996/07/11 19:53:33  bentson
 * more -Z stuff folded in; re-order changes to put -Z stuff
 * after -Y stuff (to make changes clearer)
 *
 * Revision 1.36.4.12  1996/07/11 15:40:55  bentson
 * Add code to poll Cyclades-Z.  Add code to get & set RS-232 control.
 * Add code to send break.  Clear firmware ID word at startup (so
 * that other code won't talk to inactive board).
 *
 * Revision 1.36.4.11  1996/07/09 05:28:29  bentson
 * add code for -Z in set_line_char
 *
 * Revision 1.36.4.10  1996/07/08 19:28:37  bentson
 * fold more -Z stuff (or in some cases, error messages)
 * into driver; add text to "don't know what to do" messages.
 *
 * Revision 1.36.4.9  1996/07/08 18:38:38  bentson
 * moved compile-time flags near top of file; cosmetic changes
 * to narrow text (to allow 2-up printing); changed many declarations
 * to "static" to limit external symbols; shuffled code order to
 * coalesce -Y and -Z specific code, also to put internal functions
 * in order of tty_driver structure; added code to recognize -Z
 * ports (and for moment, do nothing or report error); add cy_startup
 * to parse boot command line for extra base addresses for ISA probes;
 *
 * Revision 1.36.4.8  1996/06/25 17:40:19  bentson
 * reorder some code, fix types of some vars (int vs. long),
 * add cy_setup to support user declared ISA addresses
 *
 * Revision 1.36.4.7  1996/06/21 23:06:18  bentson
 * dump ioctl based firmware load (it's now a user level
 * program); ensure uninitialzed ports cannot be used
 *
 * Revision 1.36.4.6  1996/06/20 23:17:19  bentson
 * rename vars and restructure some code
 *
 * Revision 1.36.4.5  1996/06/14 15:09:44  bentson
 * get right status back after boot load
 *
 * Revision 1.36.4.4  1996/06/13 19:51:44  bentson
 * successfully loads firmware
 *
 * Revision 1.36.4.3  1996/06/13 06:08:33  bentson
 * add more of the code for the boot/load ioctls
 *
 * Revision 1.36.4.2  1996/06/11 21:00:51  bentson
 * start to add Z functionality--starting with ioctl
 * for loading firmware
 *
 * Revision 1.36.4.1  1996/06/10 18:03:02  bentson
 * added code to recognize Z/PCI card at initialization; report
 * presence, but card is not initialized (because firmware needs
 * to be loaded)
 *
 * Revision 1.36.3.8  1996/06/07 16:29:00  bentson
 * starting minor number at zero; added missing verify_area
 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
 *
 * Revision 1.36.3.7  1996/04/19 21:06:18  bentson
 * remove unneeded boot message & fix CLOCAL hardware flow
 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
 * remove unused diagnostic statements; minor 0 is first;
 *
 * Revision 1.36.3.6  1996/03/13 13:21:17  marcio
 * The kernel function vremap (available only in later 1.3.xx kernels)
 * allows the access to memory addresses above the RAM. This revision
 * of the driver supports PCI boards below 1Mb (device id 0x100) and
 * above 1Mb (device id 0x101).
 *
 * Revision 1.36.3.5  1996/03/07 15:20:17  bentson
 * Some global changes to interrupt handling spilled into
 * this driver--mostly unused arguments in system function
 * calls.  Also added change by Marcio Saito which should
 * reduce lost interrupts at startup by fast processors.
 *
 * Revision 1.36.3.4  1995/11/13  20:45:10  bentson
 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
 * in 1.3.41 kernel to remove a possible race condition, extend
 * some error messages, and let the driver run as a loadable module
 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
 * possible race condition.
 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
 *
 * Revision 1.36.3.3  1995/11/13  19:44:48  bentson
 * Changes by Linus Torvalds in 1.3.33 kernel distribution
 * required due to reordering of driver initialization.
 * Drivers are now initialized *after* memory management.
 *
 * Revision 1.36.3.2  1995/09/08  22:07:14  bentson
 * remove printk from ISR; fix typo
 *
 * Revision 1.36.3.1  1995/09/01  12:00:42  marcio
 * Minor fixes in the PCI board support. PCI function calls in
 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
 * <duncan@okay.com>. "bad serial count" message removed.
 *
 * Revision 1.36.3  1995/08/22  09:19:42  marcio
 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
 * board initialization. Changes in the boot messages. The driver
 * supports up to 4 boards and 64 ports by default.
 *
 * Revision 1.36.1.4  1995/03/29  06:14:14  bentson
 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
 *
 * Revision 1.36.1.3  1995/03/23  22:15:35  bentson
 * add missing break in modem control block in ioctl switch statement
 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
 *
 * Revision 1.36.1.2  1995/03/22  19:16:22  bentson
 * make sure CTS flow control is set as soon as possible (thanks
 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
 *
 * Revision 1.36.1.1  1995/03/13  15:44:43  bentson
 * initialize defaults for receive threshold and stale data timeout;
 * cosmetic changes;
 *
 * Revision 1.36  1995/03/10  23:33:53  bentson
 * added support of chips 4-7 in 32 port Cyclom-Ye;
 * fix cy_interrupt pointer dereference problem
 * (Joe Portman <baron@aa.net>);
 * give better error response if open is attempted on non-existent port
 * (Zachariah Vaum <jchryslr@netcom.com>);
 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
 * conditional compilation for -16Y on systems with fast, noisy bus;
 * comment out diagnostic print function;
 * cleaned up table of base addresses;
 * set receiver time-out period register to correct value,
 * set receive threshold to better default values,
 * set chip timer to more accurate 200 Hz ticking,
 * add code to monitor and modify receive parameters
 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
 * <njs@scifi.emi.net>);
 *
 * Revision 1.35  1994/12/16  13:54:18  steffen
 * additional patch by Marcio Saito for board detection
 * Accidently left out in 1.34
 *
 * Revision 1.34  1994/12/10  12:37:12  steffen
 * This is the corrected version as suggested by Marcio Saito
 *
 * Revision 1.33  1994/12/01  22:41:18  bentson
 * add hooks to support more high speeds directly; add tytso
 * patch regarding CLOCAL wakeups
 *
 * Revision 1.32  1994/11/23  19:50:04  bentson
 * allow direct kernel control of higher signalling rates;
 * look for cards at additional locations
 *
 * Revision 1.31  1994/11/16  04:33:28  bentson
 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
 * a problem in chars_in_buffer has been resolved by some
 * small changes;  this should yield smoother output
 *
 * Revision 1.30  1994/11/16  04:28:05  bentson
 * Fix from Corey Minyard, Internet: minyard@metronet.com,
 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
 * cy_hangup that appears to clear up much (all?) of the
 * DTR glitches; also he's added/cleaned-up diagnostic messages
 *
 * Revision 1.29  1994/11/16  04:16:07  bentson
 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
 * operate higher speeds in same way as other serial ports;
 * add more serial ports (for up to two 16-port muxes).
 *
 * Revision 1.28  1994/11/04  00:13:16  root
 * turn off diagnostic messages
 *
 * Revision 1.27  1994/11/03  23:46:37  root
 * bunch of changes to bring driver into greater conformance
 * with the serial.c driver (looking for missed fixes)
 *
 * Revision 1.26  1994/11/03  22:40:36  root
 * automatic interrupt probing fixed.
 *
 * Revision 1.25  1994/11/03  20:17:02  root
 * start to implement auto-irq
 *
 * Revision 1.24  1994/11/03  18:01:55  root
 * still working on modem signals--trying not to drop DTR
 * during the getty/login processes
 *
 * Revision 1.23  1994/11/03  17:51:36  root
 * extend baud rate support; set receive threshold as function
 * of baud rate; fix some problems with RTS/CTS;
 *
 * Revision 1.22  1994/11/02  18:05:35  root
 * changed arguments to udelay to type long to get
 * delays to be of correct duration
 *
 * Revision 1.21  1994/11/02  17:37:30  root
 * employ udelay (after calibrating loops_per_second earlier
 * in init/main.c) instead of using home-grown delay routines
 *
 * Revision 1.20  1994/11/02  03:11:38  root
 * cy_chars_in_buffer forces a return value of 0 to let
 * login work (don't know why it does); some functions
 * that were returning EFAULT, now executes the code;
 * more work on deciding when to disable xmit interrupts;
 *
 * Revision 1.19  1994/11/01  20:10:14  root
 * define routine to start transmission interrupts (by enabling
 * transmit interrupts); directly enable/disable modem interrupts;
 *
 * Revision 1.18  1994/11/01  18:40:45  bentson
 * Don't always enable transmit interrupts in startup; interrupt on
 * TxMpty instead of TxRdy to help characters get out before shutdown;
 * restructure xmit interrupt to check for chars first and quit if
 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
 * (to my view);
 *
 * Revision 1.17  1994/10/30  04:39:45  bentson
 * rename serial_driver and callout_driver to cy_serial_driver and
 * cy_callout_driver to avoid linkage interference; initialize
 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
 * from cyclades_port structure; add paranoia check to cy_close;
 *
 * Revision 1.16  1994/10/30  01:14:33  bentson
 * change major numbers; add some _early_ return statements;
 *
 * Revision 1.15  1994/10/29  06:43:15  bentson
 * final tidying up for clean compile;  enable some error reporting
 *
 * Revision 1.14  1994/10/28  20:30:22  Bentson
 * lots of changes to drag the driver towards the new tty_io
 * structures and operation.  not expected to work, but may
 * compile cleanly.
 *
 * Revision 1.13  1994/07/21  23:08:57  Bentson
 * add some diagnostic cruft; support 24 lines (for testing
 * both -8Y and -16Y cards; be more thorough in servicing all
 * chips during interrupt; add "volatile" a few places to
 * circumvent compiler optimizations; fix base & offset
 * computations in block_til_ready (was causing chip 0 to
 * stop operation)
 *
 * Revision 1.12  1994/07/19  16:42:11  Bentson
 * add some hackery for kernel version 1.1.8; expand
 * error messages; refine timing for delay loops and
 * declare loop params volatile
 *
 * Revision 1.11  1994/06/11  21:53:10  bentson
 * get use of save_car right in transmit interrupt service
 *
 * Revision 1.10.1.1  1994/06/11  21:31:18  bentson
 * add some diagnostic printing; try to fix save_car stuff
 *
 * Revision 1.10  1994/06/11  20:36:08  bentson
 * clean up compiler warnings
 *
 * Revision 1.9  1994/06/11  19:42:46  bentson
 * added a bunch of code to support modem signalling
 *
 * Revision 1.8  1994/06/11  17:57:07  bentson
 * recognize break & parity error
 *
 * Revision 1.7  1994/06/05  05:51:34  bentson
 * Reorder baud table to be monotonic; add cli to CP; discard
 * incoming characters and status if the line isn't open; start to
 * fold code into cy_throttle; start to port get_serial_info,
 * set_serial_info, get_modem_info, set_modem_info, and send_break
 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
 * get flow control characters from tty struct; invalidate ports w/o
 * hardware;
 *
 * Revision 1.6  1994/05/31  18:42:21  bentson
 * add a loop-breaker in the interrupt service routine;
 * note when port is initialized so that it can be shut
 * down under the right conditions; receive works without
 * any obvious errors
 *
 * Revision 1.5  1994/05/30  00:55:02  bentson
 * transmit works without obvious errors
 *
 * Revision 1.4  1994/05/27  18:46:27  bentson
 * incorporated more code from lib_y.c; can now print short
 * strings under interrupt control to port zero; seems to
 * select ports/channels/lines correctly
 *
 * Revision 1.3  1994/05/25  22:12:44  bentson
 * shifting from multi-port on a card to proper multiplexor
 * data structures;  added skeletons of most routines
 *
 * Revision 1.2  1994/05/19  13:21:43  bentson
 * start to crib from other sources
 *
 */

#define CY_VERSION	"2.4"

/* If you need to install more boards than NR_CARDS, change the constant
   in the definition below. No other change is necessary to support up to
   eight boards. Beyond that you'll have to extend cy_isa_addresses. */

#define NR_CARDS	4

/*
   If the total number of ports is larger than NR_PORTS, change this
   constant in the definition below. No other change is necessary to
   support more boards/ports. */

#define NR_PORTS	256

#define ZE_V1_NPORTS	64
#define ZO_V1	0
#define ZO_V2	1
#define ZE_V1	2

#define	SERIAL_PARANOIA_CHECK
#undef	CY_DEBUG_OPEN
#undef	CY_DEBUG_THROTTLE
#undef	CY_DEBUG_OTHER
#undef	CY_DEBUG_IO
#undef	CY_DEBUG_COUNT
#undef	CY_DEBUG_DTR
#undef	CY_DEBUG_WAIT_UNTIL_SENT
#undef	CY_DEBUG_INTERRUPTS
#undef	CY_16Y_HACK
#undef	CY_ENABLE_MONITORING
#undef	CY_PCI_DEBUG

#if 0
#define PAUSE __asm__("nop")
#else
#define PAUSE do {} while (0)
#endif

/*
 * Include section 
 */
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>
#include <linux/cyclades.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/bitops.h>

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

#define	CY_LOCK(info,flags)					\
		do {						\
		spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
		} while (0)

#define	CY_UNLOCK(info,flags)					\
		do {						\
		spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
		} while (0)

#include <linux/kernel.h>
#include <linux/pci.h>

#include <linux/stat.h>
#include <linux/proc_fs.h>

static void cy_throttle(struct tty_struct *tty);
static void cy_send_xchar(struct tty_struct *tty, char ch);

#define IS_CYC_Z(card) ((card).num_chips == -1)

#define Z_FPGA_CHECK(card) \
	((cy_readl(&((struct RUNTIME_9060 __iomem *) \
		((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)

#define ISZLOADED(card)	(((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \
			((card).ctl_addr))->mail_box_0)) || \
			Z_FPGA_CHECK(card)) && \
			(ZFIRM_ID==cy_readl(&((struct FIRM_ID __iomem *) \
			((card).base_addr+ID_ADDRESS))->signature)))

#ifndef SERIAL_XMIT_SIZE
#define	SERIAL_XMIT_SIZE	(min(PAGE_SIZE, 4096))
#endif
#define WAKEUP_CHARS		256

#define STD_COM_FLAGS (0)

static struct tty_driver *cy_serial_driver;

#ifdef CONFIG_ISA
/* This is the address lookup table. The driver will probe for
   Cyclom-Y/ISA boards at all addresses in here. If you want the
   driver to probe addresses at a different address, add it to
   this table.  If the driver is probing some other board and
   causing problems, remove the offending address from this table.
   The cy_setup function extracts additional addresses from the
   boot options line.  The form is "cyclades=address,address..."
*/

static unsigned int cy_isa_addresses[] = {
	0xD0000,
	0xD2000,
	0xD4000,
	0xD6000,
	0xD8000,
	0xDA000,
	0xDC000,
	0xDE000,
	0, 0, 0, 0, 0, 0, 0, 0
};

#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)

#ifdef MODULE
static long maddr[NR_CARDS] = { 0, };
static int irq[NR_CARDS] = { 0, };

module_param_array(maddr, long, NULL, 0);
module_param_array(irq, int, NULL, 0);
#endif

#endif				/* CONFIG_ISA */

/* This is the per-card data structure containing address, irq, number of
   channels, etc. This driver supports a maximum of NR_CARDS cards.
*/
static struct cyclades_card cy_card[NR_CARDS];

/* This is the per-channel data structure containing pointers, flags
 and variables for the port. This driver supports a maximum of NR_PORTS.
*/
static struct cyclades_port cy_port[NR_PORTS];

static int cy_next_channel;	/* next minor available */

/*
 * This is used to look up the divisor speeds and the timeouts
 * We're normally limited to 15 distinct baud rates.  The extra
 * are accessed via settings in info->flags.
 *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
 *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
 *                                               HI            VHI
 *     20
 */
static int baud_table[] = {
	0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
	1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
	230400, 0
};

static char baud_co_25[] = {	/* 25 MHz clock option table */
	/* value =>    00    01   02    03    04 */
	/* divide by    8    32   128   512  2048 */
	0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
	0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

static char baud_bpr_25[] = {	/* 25 MHz baud rate period table */
	0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
	0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
};

static char baud_co_60[] = {	/* 60 MHz clock option table (CD1400 J) */
	/* value =>    00    01   02    03    04 */
	/* divide by    8    32   128   512  2048 */
	0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
	0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00
};

static char baud_bpr_60[] = {	/* 60 MHz baud rate period table (CD1400 J) */
	0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
	0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
	0x21
};

static char baud_cor3[] = {	/* receive threshold */
	0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
	0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
	0x07
};

/*
 * The Cyclades driver implements HW flow control as any serial driver.
 * The cyclades_port structure member rflow and the vector rflow_thr 
 * allows us to take advantage of a special feature in the CD1400 to avoid 
 * data loss even when the system interrupt latency is too high. These flags 
 * are to be used only with very special applications. Setting these flags 
 * requires the use of a special cable (DTR and RTS reversed). In the new 
 * CD1400-based boards (rev. 6.00 or later), there is no need for special 
 * cables.
 */

static char rflow_thr[] = {	/* rflow threshold */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
	0x0a
};

/*  The Cyclom-Ye has placed the sequential chips in non-sequential
 *  address order.  This look-up table overcomes that problem.
 */
static int cy_chip_offset[] = { 0x0000,
	0x0400,
	0x0800,
	0x0C00,
	0x0200,
	0x0600,
	0x0A00,
	0x0E00
};

/* PCI related definitions */

static unsigned short cy_pci_nboard;
static unsigned short cy_isa_nboard;
static unsigned short cy_nboard;
#ifdef CONFIG_PCI
static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },	/* PCI < 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },	/* PCI > 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },	/* 4Y PCI < 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },	/* 4Y PCI > 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },	/* 8Y PCI < 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },	/* 8Y PCI > 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },	/* Z PCI < 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },	/* Z PCI > 1Mb */
	{ }			/* end of table */
};
MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
#endif

static void cy_start(struct tty_struct *);
static void set_line_char(struct cyclades_port *);
static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
#ifdef CONFIG_ISA
static unsigned detect_isa_irq(void __iomem *);
#endif				/* CONFIG_ISA */

static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);

#ifndef CONFIG_CYZ_INTR
static void cyz_poll(unsigned long);

/* The Cyclades-Z polling cycle is defined by this variable */
static long cyz_polling_cycle = CZ_DEF_POLL;

static int cyz_timeron = 0;
static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);

#else				/* CONFIG_CYZ_INTR */
static void cyz_rx_restart(unsigned long);
static struct timer_list cyz_rx_full_timer[NR_PORTS];
#endif				/* CONFIG_CYZ_INTR */

static inline int serial_paranoia_check(struct cyclades_port *info,
		char *name, const char *routine)
{
#ifdef SERIAL_PARANOIA_CHECK
	if (!info) {
		printk("cyc Warning: null cyclades_port for (%s) in %s\n",
				name, routine);
		return 1;
	}

	if ((long)info < (long)(&cy_port[0]) ||
			(long)(&cy_port[NR_PORTS]) < (long)info) {
		printk("cyc Warning: cyclades_port out of range for (%s) in "
				"%s\n", name, routine);
		return 1;
	}

	if (info->magic != CYCLADES_MAGIC) {
		printk("cyc Warning: bad magic number for serial struct (%s) "
				"in %s\n", name, routine);
		return 1;
	}
#endif
	return 0;
}				/* serial_paranoia_check */

/*
 * This routine is used by the interrupt handler to schedule
 * processing in the software interrupt portion of the driver
 * (also known as the "bottom half").  This can be called any
 * number of times for any channel without harm.
 */
static inline void cy_sched_event(struct cyclades_port *info, int event)
{
	info->event |= 1 << event; /* remember what kind of event and who */
	schedule_work(&info->tqueue);
}				/* cy_sched_event */

/*
 * This routine is used to handle the "bottom half" processing for the
 * serial driver, known also the "software interrupt" processing.
 * This processing is done at the kernel interrupt level, after the
 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON.  This
 * is where time-consuming activities which can not be done in the
 * interrupt driver proper are done; the interrupt driver schedules
 * them using cy_sched_event(), and they get done here.
 *
 * This is done through one level of indirection--the task queue.
 * When a hardware interrupt service routine wants service by the
 * driver's bottom half, it enqueues the appropriate tq_struct (one
 * per port) to the keventd work queue and sets a request flag
 * that the work queue be processed.
 *
 * Although this may seem unwieldy, it gives the system a way to
 * pass an argument (in this case the pointer to the cyclades_port
 * structure) to the bottom half of the driver.  Previous kernels
 * had to poll every port to see if that port needed servicing.
 */
static void
do_softint(struct work_struct *work)
{
	struct cyclades_port *info =
		container_of(work, struct cyclades_port, tqueue);
	struct tty_struct    *tty;

	tty = info->tty;
	if (!tty)
		return;

	if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
		tty_hangup(info->tty);
		wake_up_interruptible(&info->open_wait);
		        info->flags &= ~ASYNC_NORMAL_ACTIVE;
	}
	if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
		wake_up_interruptible(&info->open_wait);
#ifdef CONFIG_CYZ_INTR
	if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
		if (cyz_rx_full_timer[info->line].function == NULL) {
			cyz_rx_full_timer[info->line].expires = jiffies + 1;
			cyz_rx_full_timer[info->line].function = cyz_rx_restart;
			cyz_rx_full_timer[info->line].data =
						(unsigned long)info;
			add_timer(&cyz_rx_full_timer[info->line]);
		}
	}
#endif
	if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
		wake_up_interruptible(&info->delta_msr_wait);
	tty_wakeup(tty);
#ifdef Z_WAKE
	if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
		wake_up_interruptible(&info->shutdown_wait);
#endif
} /* do_softint */


/***********************************************************/
/********* Start of block of Cyclom-Y specific code ********/

/* This routine waits up to 1000 micro-seconds for the previous
   command to the Cirrus chip to complete and then issues the
   new command.  An error is returned if the previous command
   didn't finish within the time limit.

   This function is only called from inside spinlock-protected code.
 */
static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
{
	volatile int i;

	/* Check to see that the previous command has completed */
	for (i = 0; i < 100; i++) {
		if (cy_readb(base_addr + (CyCCR << index)) == 0) {
			break;
		}
		udelay(10L);
	}
	/* if the CCR never cleared, the previous command
	   didn't finish within the "reasonable time" */
	if (i == 100)
		return -1;

	/* Issue the new command */
	cy_writeb(base_addr + (CyCCR << index), cmd);

	return 0;
}				/* cyy_issue_cmd */

#ifdef CONFIG_ISA
/* ISA interrupt detection code */
static unsigned detect_isa_irq(void __iomem * address)
{
	int irq;
	unsigned long irqs, flags;
	int save_xir, save_car;
	int index = 0;		/* IRQ probing is only for ISA */

	/* forget possible initially masked and pending IRQ */
	irq = probe_irq_off(probe_irq_on());

	/* Clear interrupts on the board first */
	cy_writeb(address + (Cy_ClrIntr << index), 0);
	/* Cy_ClrIntr is 0x1800 */

	irqs = probe_irq_on();
	/* Wait ... */
	udelay(5000L);

	/* Enable the Tx interrupts on the CD1400 */
	local_irq_save(flags);
	cy_writeb(address + (CyCAR << index), 0);
	cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);

	cy_writeb(address + (CyCAR << index), 0);
	cy_writeb(address + (CySRER << index),
		  cy_readb(address + (CySRER << index)) | CyTxRdy);
	local_irq_restore(flags);

	/* Wait ... */
	udelay(5000L);

	/* Check which interrupt is in use */
	irq = probe_irq_off(irqs);

	/* Clean up */
	save_xir = (u_char) cy_readb(address + (CyTIR << index));
	save_car = cy_readb(address + (CyCAR << index));
	cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
	cy_writeb(address + (CySRER << index),
		  cy_readb(address + (CySRER << index)) & ~CyTxRdy);
	cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
	cy_writeb(address + (CyCAR << index), (save_car));
	cy_writeb(address + (Cy_ClrIntr << index), 0);
	/* Cy_ClrIntr is 0x1800 */

	return (irq > 0) ? irq : 0;
}
#endif				/* CONFIG_ISA */

static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
			void __iomem * base_addr, int status, int index)
{
	struct cyclades_port *info;
	struct tty_struct *tty;
	volatile int char_count;
	int i, j, len, mdm_change, mdm_status, outch;
	int save_xir, channel, save_car;
	char data;

	if (status & CySRReceive) {	/* reception interrupt */
#ifdef CY_DEBUG_INTERRUPTS
		printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
#endif
		/* determine the channel & change to that context */
		spin_lock(&cinfo->card_lock);
		save_xir = (u_char) cy_readb(base_addr + (CyRIR << index));
		channel = (u_short) (save_xir & CyIRChannel);
		i = channel + chip * 4 + cinfo->first_line;
		info = &cy_port[i];
		info->last_active = jiffies;
		save_car = cy_readb(base_addr + (CyCAR << index));
		cy_writeb(base_addr + (CyCAR << index), save_xir);

		/* if there is nowhere to put the data, discard it */
		if (info->tty == 0) {
			j = (cy_readb(base_addr + (CyRIVR << index)) &
				CyIVRMask);
			if (j == CyIVRRxEx) {	/* exception */
				data = cy_readb(base_addr + (CyRDSR << index));
			} else {	/* normal character reception */
				char_count = cy_readb(base_addr +
						(CyRDCR << index));
				while (char_count--) {
					data = cy_readb(base_addr +
						(CyRDSR << index));
				}
			}
		} else {	/* there is an open port for this data */
			tty = info->tty;
			j = (cy_readb(base_addr + (CyRIVR << index)) &
					CyIVRMask);
			if (j == CyIVRRxEx) {	/* exception */
				data = cy_readb(base_addr + (CyRDSR << index));

				/* For statistics only */
				if (data & CyBREAK)
					info->icount.brk++;
				else if (data & CyFRAME)
					info->icount.frame++;
				else if (data & CyPARITY)
					info->icount.parity++;
				else if (data & CyOVERRUN)
					info->icount.overrun++;

				if (data & info->ignore_status_mask) {
					info->icount.rx++;
					return;
				}
				if (tty_buffer_request_room(tty, 1)) {
					if (data & info->read_status_mask) {
						if (data & CyBREAK) {
							tty_insert_flip_char(
								tty,
								cy_readb(
								base_addr +
								(CyRDSR <<
									index)),
								TTY_BREAK);
							info->icount.rx++;
							if (info->flags &
							    ASYNC_SAK) {
								do_SAK(tty);
							}
						} else if (data & CyFRAME) {
							tty_insert_flip_char(
								tty,
								cy_readb(
								base_addr +
								(CyRDSR <<
									index)),
								TTY_FRAME);
							info->icount.rx++;
							info->idle_stats.
								frame_errs++;
						} else if (data & CyPARITY) {
							/* Pieces of seven... */
							tty_insert_flip_char(
								tty,
								cy_readb(
								base_addr +
								(CyRDSR <<
									index)),
								TTY_PARITY);
							info->icount.rx++;
							info->idle_stats.
								parity_errs++;
						} else if (data & CyOVERRUN) {
							tty_insert_flip_char(
								tty, 0,
								TTY_OVERRUN);
							info->icount.rx++;
						/* If the flip buffer itself is
						   overflowing, we still lose
						   the next incoming character.
						 */
							tty_insert_flip_char(
								tty,
								cy_readb(
								base_addr +
								(CyRDSR <<
									index)),
								TTY_FRAME);
							info->icount.rx++;
							info->idle_stats.
								overruns++;
					/* These two conditions may imply */
					/* a normal read should be done. */
					/* }else if(data & CyTIMEOUT){ */
					/* }else if(data & CySPECHAR){ */
						} else {
							tty_insert_flip_char(
								tty, 0,
								TTY_NORMAL);
							info->icount.rx++;
						}
					} else {
						tty_insert_flip_char(tty, 0,
								TTY_NORMAL);
						info->icount.rx++;
					}
				} else {
					/* there was a software buffer
					   overrun and nothing could be
					   done about it!!! */
					info->icount.buf_overrun++;
					info->idle_stats.overruns++;
				}
			} else {	/* normal character reception */
				/* load # chars available from the chip */
				char_count = cy_readb(base_addr +
						(CyRDCR << index));

#ifdef CY_ENABLE_MONITORING
				++info->mon.int_count;
				info->mon.char_count += char_count;
				if (char_count > info->mon.char_max)
					info->mon.char_max = char_count;
				info->mon.char_last = char_count;
#endif
				len = tty_buffer_request_room(tty, char_count);
				while (len--) {
					data = cy_readb(base_addr +
							(CyRDSR << index));
					tty_insert_flip_char(tty, data,
							TTY_NORMAL);
					info->idle_stats.recv_bytes++;
					info->icount.rx++;
#ifdef CY_16Y_HACK
					udelay(10L);
#endif
				}
				info->idle_stats.recv_idle = jiffies;
			}
			tty_schedule_flip(tty);
		}
		/* end of service */
		cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
		cy_writeb(base_addr + (CyCAR << index), (save_car));
		spin_unlock(&cinfo->card_lock);
	}

	if (status & CySRTransmit) {	/* transmission interrupt */
		/* Since we only get here when the transmit buffer
		   is empty, we know we can always stuff a dozen
		   characters. */
#ifdef CY_DEBUG_INTERRUPTS
		printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
#endif

		/* determine the channel & change to that context */
		spin_lock(&cinfo->card_lock);
		save_xir = (u_char) cy_readb(base_addr + (CyTIR << index));
		channel = (u_short) (save_xir & CyIRChannel);
		i = channel + chip * 4 + cinfo->first_line;
		save_car = cy_readb(base_addr + (CyCAR << index));
		cy_writeb(base_addr + (CyCAR << index), save_xir);

		/* validate the port# (as configured and open) */
		if ((i < 0) || (NR_PORTS <= i)) {
			cy_writeb(base_addr + (CySRER << index),
				  cy_readb(base_addr + (CySRER << index)) &
				  ~CyTxRdy);
			goto txend;
		}
		info = &cy_port[i];
		info->last_active = jiffies;
		if (info->tty == 0) {
			cy_writeb(base_addr + (CySRER << index),
				  cy_readb(base_addr + (CySRER << index)) &
				  ~CyTxRdy);
			goto txdone;
		}

		/* load the on-chip space for outbound data */
		char_count = info->xmit_fifo_size;

		if (info->x_char) {	/* send special char */
			outch = info->x_char;
			cy_writeb(base_addr + (CyTDR << index), outch);
			char_count--;
			info->icount.tx++;
			info->x_char = 0;
		}

		if (info->breakon || info->breakoff) {
			if (info->breakon) {
				cy_writeb(base_addr + (CyTDR << index), 0);
				cy_writeb(base_addr + (CyTDR << index), 0x81);
				info->breakon = 0;
				char_count -= 2;
			}
			if (info->breakoff) {
				cy_writeb(base_addr + (CyTDR << index), 0);
				cy_writeb(base_addr + (CyTDR << index), 0x83);
				info->breakoff = 0;
				char_count -= 2;
			}
		}

		while (char_count-- > 0) {
			if (!info->xmit_cnt) {
				if (cy_readb(base_addr + (CySRER << index)) &
						CyTxMpty) {
					cy_writeb(base_addr + (CySRER << index),
						cy_readb(base_addr +
							(CySRER << index)) &
						~CyTxMpty);
				} else {
					cy_writeb(base_addr + (CySRER << index),
						(cy_readb(base_addr +
						  	(CySRER << index)) &
						~CyTxRdy) | CyTxMpty);
				}
				goto txdone;
			}
			if (info->xmit_buf == 0) {
				cy_writeb(base_addr + (CySRER << index),
					cy_readb(base_addr + (CySRER << index))&
					~CyTxRdy);
				goto txdone;
			}
			if (info->tty->stopped || info->tty->hw_stopped) {
				cy_writeb(base_addr + (CySRER << index),
					cy_readb(base_addr + (CySRER << index))&
					~CyTxRdy);
				goto txdone;
			}
			/* Because the Embedded Transmit Commands have
			   been enabled, we must check to see if the
			   escape character, NULL, is being sent.  If it
			   is, we must ensure that there is room for it
			   to be doubled in the output stream.  Therefore
			   we no longer advance the pointer when the
			   character is fetched, but rather wait until
			   after the check for a NULL output character.
			   This is necessary because there may not be
			   room for the two chars needed to send a NULL.)
			 */
			outch = info->xmit_buf[info->xmit_tail];
			if (outch) {
				info->xmit_cnt--;
				info->xmit_tail = (info->xmit_tail + 1) &
						(SERIAL_XMIT_SIZE - 1);
				cy_writeb(base_addr + (CyTDR << index), outch);
				info->icount.tx++;
			} else {
				if (char_count > 1) {
					info->xmit_cnt--;
					info->xmit_tail = (info->xmit_tail + 1)&
						(SERIAL_XMIT_SIZE - 1);
					cy_writeb(base_addr + (CyTDR << index),
						outch);
					cy_writeb(base_addr + (CyTDR << index),
						0);
					info->icount.tx++;
					char_count--;
				} else {
				}
			}
		}

txdone:
		if (info->xmit_cnt < WAKEUP_CHARS) {
			cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
		}
txend:
		/* end of service */
		cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
		cy_writeb(base_addr + (CyCAR << index), (save_car));
		spin_unlock(&cinfo->card_lock);
	}

	if (status & CySRModem) {	/* modem interrupt */

		/* determine the channel & change to that context */
		spin_lock(&cinfo->card_lock);
		save_xir = (u_char) cy_readb(base_addr + (CyMIR << index));
		channel = (u_short) (save_xir & CyIRChannel);
		info = &cy_port[channel + chip * 4 + cinfo->first_line];
		info->last_active = jiffies;
		save_car = cy_readb(base_addr + (CyCAR << index));
		cy_writeb(base_addr + (CyCAR << index), save_xir);

		mdm_change = cy_readb(base_addr + (CyMISR << index));
		mdm_status = cy_readb(base_addr + (CyMSVR1 << index));

		if (info->tty == 0) {	/* no place for data, ignore it */
			;
		} else {
			if (mdm_change & CyANY_DELTA) {
				/* For statistics only */
				if (mdm_change & CyDCD)
					info->icount.dcd++;
				if (mdm_change & CyCTS)
					info->icount.cts++;
				if (mdm_change & CyDSR)
					info->icount.dsr++;
				if (mdm_change & CyRI)
					info->icount.rng++;

				cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
			}

			if ((mdm_change & CyDCD) &&
					(info->flags & ASYNC_CHECK_CD)) {
				if (mdm_status & CyDCD) {
					cy_sched_event(info,
							Cy_EVENT_OPEN_WAKEUP);
				} else {
					cy_sched_event(info, Cy_EVENT_HANGUP);
				}
			}
			if ((mdm_change & CyCTS) &&
					(info->flags & ASYNC_CTS_FLOW)) {
				if (info->tty->hw_stopped) {
					if (mdm_status & CyCTS) {
						/* cy_start isn't used
						   because... !!! */
						info->tty->hw_stopped = 0;
						cy_writeb(base_addr +
							(CySRER << index),
							cy_readb(base_addr +
								(CySRER <<
									index))|
							CyTxRdy);
						cy_sched_event(info,
							Cy_EVENT_WRITE_WAKEUP);
					}
				} else {
					if (!(mdm_status & CyCTS)) {
						/* cy_stop isn't used
						   because ... !!! */
						info->tty->hw_stopped = 1;
						cy_writeb(base_addr +
							(CySRER << index),
							cy_readb(base_addr +
								(CySRER <<
								index)) &
							~CyTxRdy);
					}
				}
			}
			if (mdm_change & CyDSR) {
			}
			if (mdm_change & CyRI) {
			}
		}
		/* end of service */
		cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
		cy_writeb(base_addr + (CyCAR << index), save_car);
		spin_unlock(&cinfo->card_lock);
	}
}

/* The real interrupt service routine is called
   whenever the card wants its hand held--chars
   received, out buffer empty, modem change, etc.
 */
static irqreturn_t cyy_interrupt(int irq, void *dev_id)
{
	int status;
	struct cyclades_card *cinfo;
	void __iomem *base_addr, *card_base_addr;
	int chip;
	int index;
	int too_many;
	int had_work;

	if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
#ifdef CY_DEBUG_INTERRUPTS
		printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
#endif
		return IRQ_NONE;	/* spurious interrupt */
	}

	card_base_addr = cinfo->base_addr;
	index = cinfo->bus_index;

	/* This loop checks all chips in the card.  Make a note whenever
	   _any_ chip had some work to do, as this is considered an
	   indication that there will be more to do.  Only when no chip
	   has any work does this outermost loop exit.
	 */
	do {
		had_work = 0;
		for (chip = 0; chip < cinfo->num_chips; chip++) {
			base_addr = cinfo->base_addr +
					(cy_chip_offset[chip] << index);
			too_many = 0;
			while ((status = cy_readb(base_addr +
						(CySVRR << index))) != 0x00) {
				had_work++;
			/* The purpose of the following test is to ensure that
			   no chip can monopolize the driver.  This forces the
			   chips to be checked in a round-robin fashion (after
			   draining each of a bunch (1000) of characters).
			 */
				if (1000 < too_many++) {
					break;
				}
				cyy_intr_chip(cinfo, chip, base_addr, status,
						index);
			}
		}
	} while (had_work);

	/* clear interrupts */
	spin_lock(&cinfo->card_lock);
	cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
	/* Cy_ClrIntr is 0x1800 */
	spin_unlock(&cinfo->card_lock);
	return IRQ_HANDLED;
}				/* cyy_interrupt */

/***********************************************************/
/********* End of block of Cyclom-Y specific code **********/
/******** Start of block of Cyclades-Z specific code *********/
/***********************************************************/

static int
cyz_fetch_msg(struct cyclades_card *cinfo,
		__u32 * channel, __u8 * cmd, __u32 * param)
{
	struct FIRM_ID __iomem *firm_id;
	struct ZFW_CTRL __iomem *zfw_ctrl;
	struct BOARD_CTRL __iomem *board_ctrl;
	unsigned long loc_doorbell;

	firm_id = cinfo->base_addr + ID_ADDRESS;
	if (!ISZLOADED(*cinfo)) {
		return -1;
	}
	zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
			0xfffff);
	board_ctrl = &zfw_ctrl->board_ctrl;

	loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
				  (cinfo->ctl_addr))->loc_doorbell);
	if (loc_doorbell) {
		*cmd = (char)(0xff & loc_doorbell);
		*channel = cy_readl(&board_ctrl->fwcmd_channel);
		*param = (__u32) cy_readl(&board_ctrl->fwcmd_param);
		cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
			  loc_doorbell, 0xffffffff);
		return 1;
	}
	return 0;
}				/* cyz_fetch_msg */

static int
cyz_issue_cmd(struct cyclades_card *cinfo,
		__u32 channel, __u8 cmd, __u32 param)
{
	struct FIRM_ID __iomem *firm_id;
	struct ZFW_CTRL __iomem *zfw_ctrl;
	struct BOARD_CTRL __iomem *board_ctrl;
	__u32 __iomem *pci_doorbell;
	int index;

	firm_id = cinfo->base_addr + ID_ADDRESS;
	if (!ISZLOADED(*cinfo)) {
		return -1;
	}
	zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
			0xfffff);
	board_ctrl = &zfw_ctrl->board_ctrl;

	index = 0;
	pci_doorbell =
	    &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
	while ((cy_readl(pci_doorbell) & 0xff) != 0) {
		if (index++ == 1000) {
			return (int)(cy_readl(pci_doorbell) & 0xff);
		}
		udelay(50L);
	}
	cy_writel(&board_ctrl->hcmd_channel, channel);
	cy_writel(&board_ctrl->hcmd_param, param);
	cy_writel(pci_doorbell, (long)cmd);

	return 0;
}				/* cyz_issue_cmd */

static void
cyz_handle_rx(struct cyclades_port *info,
		volatile struct CH_CTRL __iomem * ch_ctrl,
		volatile struct BUF_CTRL __iomem * buf_ctrl)
{
	struct cyclades_card *cinfo = &cy_card[info->card];
	struct tty_struct *tty = info->tty;
	volatile int char_count;
	int len;
#ifdef BLOCKMOVE
	int small_count;
#else
	char data;
#endif
	volatile __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;

	rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
	rx_put = cy_readl(&buf_ctrl->rx_put);
	rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
	rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
	if (rx_put >= rx_get)
		char_count = rx_put - rx_get;
	else
		char_count = rx_put - rx_get + rx_bufsize;

	if (char_count) {
		info->last_active = jiffies;
		info->jiffies[1] = jiffies;

#ifdef CY_ENABLE_MONITORING
		info->mon.int_count++;
		info->mon.char_count += char_count;
		if (char_count > info->mon.char_max)
			info->mon.char_max = char_count;
		info->mon.char_last = char_count;
#endif
		if (tty == 0) {
			/* flush received characters */
			new_rx_get = (new_rx_get + char_count) &
					(rx_bufsize - 1);
			info->rflush_count++;
		} else {
#ifdef BLOCKMOVE
		/* we'd like to use memcpy(t, f, n) and memset(s, c, count)
		   for performance, but because of buffer boundaries, there
		   may be several steps to the operation */
			while (0 < (small_count = min_t(unsigned int,
					rx_bufsize - new_rx_get,
					min_t(unsigned int, TTY_FLIPBUF_SIZE -
						tty->flip.count, char_count)))){
				memcpy_fromio(tty->flip.char_buf_ptr,
					(char *)(cinfo->base_addr + rx_bufaddr +
						new_rx_get),
					small_count);

				tty->flip.char_buf_ptr += small_count;
				memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
					small_count);
				tty->flip.flag_buf_ptr += small_count;
				new_rx_get = (new_rx_get + small_count) &
						(rx_bufsize - 1);
				char_count -= small_count;
				info->icount.rx += small_count;
				info->idle_stats.recv_bytes += small_count;
				tty->flip.count += small_count;
			}
#else
			len = tty_buffer_request_room(tty, char_count);
			while (len--) {
				data = cy_readb(cinfo->base_addr + rx_bufaddr +
						new_rx_get);
				new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
				tty_insert_flip_char(tty, data, TTY_NORMAL);
				info->idle_stats.recv_bytes++;
				info->icount.rx++;
			}
#endif
#ifdef CONFIG_CYZ_INTR
		/* Recalculate the number of chars in the RX buffer and issue
		   a cmd in case it's higher than the RX high water mark */
			rx_put = cy_readl(&buf_ctrl->rx_put);
			if (rx_put >= rx_get)
				char_count = rx_put - rx_get;
			else
				char_count = rx_put - rx_get + rx_bufsize;
			if (char_count >= (int)cy_readl(&buf_ctrl->
					rx_threshold)) {
				cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
			}
#endif
			info->idle_stats.recv_idle = jiffies;
			tty_schedule_flip(tty);
		}
		/* Update rx_get */
		cy_writel(&buf_ctrl->rx_get, new_rx_get);
	}
}

static void
cyz_handle_tx(struct cyclades_port *info,
		volatile struct CH_CTRL __iomem * ch_ctrl,
		volatile struct BUF_CTRL __iomem * buf_ctrl)
{
	struct cyclades_card *cinfo = &cy_card[info->card];
	struct tty_struct *tty = info->tty;
	char data;
	volatile int char_count;
#ifdef BLOCKMOVE
	int small_count;
#endif
	volatile __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;

	if (info->xmit_cnt <= 0)	/* Nothing to transmit */
		return;

	tx_get = cy_readl(&buf_ctrl->tx_get);
	tx_put = cy_readl(&buf_ctrl->tx_put);
	tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
	tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
	if (tx_put >= tx_get)
		char_count = tx_get - tx_put - 1 + tx_bufsize;
	else
		char_count = tx_get - tx_put - 1;

	if (char_count) {

		if (tty == 0) {
			goto ztxdone;
		}

		if (info->x_char) {	/* send special char */
			data = info->x_char;

			cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
			tx_put = (tx_put + 1) & (tx_bufsize - 1);
			info->x_char = 0;
			char_count--;
			info->icount.tx++;
			info->last_active = jiffies;
			info->jiffies[2] = jiffies;
		}
#ifdef BLOCKMOVE
		while (0 < (small_count = min_t(unsigned int,
				tx_bufsize - tx_put, min_t(unsigned int,
					(SERIAL_XMIT_SIZE - info->xmit_tail),
					min_t(unsigned int, info->xmit_cnt,
						char_count))))) {

			memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
					tx_put),
					&info->xmit_buf[info->xmit_tail],
					small_count);

			tx_put = (tx_put + small_count) & (tx_bufsize - 1);
			char_count -= small_count;
			info->icount.tx += small_count;
			info->xmit_cnt -= small_count;
			info->xmit_tail = (info->xmit_tail + small_count) &
					(SERIAL_XMIT_SIZE - 1);
			info->last_active = jiffies;
			info->jiffies[2] = jiffies;
		}
#else
		while (info->xmit_cnt && char_count) {
			data = info->xmit_buf[info->xmit_tail];
			info->xmit_cnt--;
			info->xmit_tail = (info->xmit_tail + 1) &
					(SERIAL_XMIT_SIZE - 1);

			cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
			tx_put = (tx_put + 1) & (tx_bufsize - 1);
			char_count--;
			info->icount.tx++;
			info->last_active = jiffies;
			info->jiffies[2] = jiffies;
		}
#endif
ztxdone:
		if (info->xmit_cnt < WAKEUP_CHARS) {
			cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
		}
		/* Update tx_put */
		cy_writel(&buf_ctrl->tx_put, tx_put);
	}
}

static void cyz_handle_cmd(struct cyclades_card *cinfo)
{
	struct tty_struct *tty;
	struct cyclades_port *info;
	static volatile struct FIRM_ID __iomem *firm_id;
	static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
	static volatile struct BOARD_CTRL __iomem *board_ctrl;
	static volatile struct CH_CTRL __iomem *ch_ctrl;
	static volatile struct BUF_CTRL __iomem *buf_ctrl;
	__u32 channel;
	__u8 cmd;
	__u32 param;
	__u32 hw_ver, fw_ver;
	int special_count;
	int delta_count;

	firm_id = cinfo->base_addr + ID_ADDRESS;
	zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
			0xfffff);
	board_ctrl = &zfw_ctrl->board_ctrl;
	fw_ver = cy_readl(&board_ctrl->fw_version);
	hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
			mail_box_0);

	while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
		special_count = 0;
		delta_count = 0;
		info = &cy_port[channel + cinfo->first_line];
		if ((tty = info->tty) == 0) {
			continue;
		}
		ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
		buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);

		switch (cmd) {
		case C_CM_PR_ERROR:
			tty_insert_flip_char(tty, 0, TTY_PARITY);
			info->icount.rx++;
			special_count++;
			break;
		case C_CM_FR_ERROR:
			tty_insert_flip_char(tty, 0, TTY_FRAME);
			info->icount.rx++;
			special_count++;
			break;
		case C_CM_RXBRK:
			tty_insert_flip_char(tty, 0, TTY_BREAK);
			info->icount.rx++;
			special_count++;
			break;
		case C_CM_MDCD:
			info->icount.dcd++;
			delta_count++;
			if (info->flags & ASYNC_CHECK_CD) {
				if ((fw_ver > 241 ? ((u_long) param) :
						cy_readl(&ch_ctrl->rs_status)) &
						C_RS_DCD) {
					cy_sched_event(info,
						 	Cy_EVENT_OPEN_WAKEUP);
				} else {
					cy_sched_event(info, Cy_EVENT_HANGUP);
				}
			}
			break;
		case C_CM_MCTS:
			info->icount.cts++;
			delta_count++;
			break;
		case C_CM_MRI:
			info->icount.rng++;
			delta_count++;
			break;
		case C_CM_MDSR:
			info->icount.dsr++;
			delta_count++;
			break;
#ifdef Z_WAKE
		case C_CM_IOCTLW:
			cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
			break;
#endif
#ifdef CONFIG_CYZ_INTR
		case C_CM_RXHIWM:
		case C_CM_RXNNDT:
		case C_CM_INTBACK2:
			/* Reception Interrupt */
#ifdef CY_DEBUG_INTERRUPTS
			printk("cyz_interrupt: rcvd intr, card %d, "
					"port %ld\n\r", info->card, channel);
#endif
			cyz_handle_rx(info, ch_ctrl, buf_ctrl);
			break;
		case C_CM_TXBEMPTY:
		case C_CM_TXLOWWM:
		case C_CM_INTBACK:
			/* Transmission Interrupt */
#ifdef CY_DEBUG_INTERRUPTS
			printk("cyz_interrupt: xmit intr, card %d, "
					"port %ld\n\r", info->card, channel);
#endif
			cyz_handle_tx(info, ch_ctrl, buf_ctrl);
			break;
#endif				/* CONFIG_CYZ_INTR */
		case C_CM_FATAL:
			/* should do something with this !!! */
			break;
		default:
			break;
		}
		if (delta_count)
			cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
		if (special_count)
			tty_schedule_flip(tty);
	}
}

#ifdef CONFIG_CYZ_INTR
static irqreturn_t cyz_interrupt(int irq, void *dev_id)
{
	struct cyclades_card *cinfo;

	if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
#ifdef CY_DEBUG_INTERRUPTS
		printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
#endif
		return IRQ_NONE;	/* spurious interrupt */
	}

	if (!ISZLOADED(*cinfo)) {
#ifdef CY_DEBUG_INTERRUPTS
		printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
#endif
		return IRQ_NONE;
	}

	/* Handle the interrupts */
	cyz_handle_cmd(cinfo);

	return IRQ_HANDLED;
}				/* cyz_interrupt */

static void cyz_rx_restart(unsigned long arg)
{
	struct cyclades_port *info = (struct cyclades_port *)arg;
	int retval;
	int card = info->card;
	__u32 channel = (info->line) - (cy_card[card].first_line);
	unsigned long flags;

	CY_LOCK(info, flags);
	retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
	if (retval != 0) {
		printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
			info->line, retval);
	}
	cyz_rx_full_timer[info->line].function = NULL;
	CY_UNLOCK(info, flags);
}

#else				/* CONFIG_CYZ_INTR */

static void cyz_poll(unsigned long arg)
{
	struct cyclades_card *cinfo;
	struct cyclades_port *info;
	struct tty_struct *tty;
	static volatile struct FIRM_ID *firm_id;
	static volatile struct ZFW_CTRL *zfw_ctrl;
	static volatile struct BOARD_CTRL *board_ctrl;
	static volatile struct CH_CTRL *ch_ctrl;
	static volatile struct BUF_CTRL *buf_ctrl;
	int card, port;

	cyz_timerlist.expires = jiffies + (HZ);
	for (card = 0; card < NR_CARDS; card++) {
		cinfo = &cy_card[card];

		if (!IS_CYC_Z(*cinfo))
			continue;
		if (!ISZLOADED(*cinfo))
			continue;

		firm_id = cinfo->base_addr + ID_ADDRESS;
		zfw_ctrl = cinfo->base_addr +
				(cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
		board_ctrl = &(zfw_ctrl->board_ctrl);

	/* Skip first polling cycle to avoid racing conditions with the FW */
		if (!cinfo->intr_enabled) {
			cinfo->nports = (int)cy_readl(&board_ctrl->n_channel);
			cinfo->intr_enabled = 1;
			continue;
		}

		cyz_handle_cmd(cinfo);

		for (port = 0; port < cinfo->nports; port++) {
			info = &cy_port[port + cinfo->first_line];
			tty = info->tty;
			ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
			buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);

			if (!info->throttle)
				cyz_handle_rx(info, ch_ctrl, buf_ctrl);
			cyz_handle_tx(info, ch_ctrl, buf_ctrl);
		}
		/* poll every 'cyz_polling_cycle' period */
		cyz_timerlist.expires = jiffies + cyz_polling_cycle;
	}
	add_timer(&cyz_timerlist);
}				/* cyz_poll */

#endif				/* CONFIG_CYZ_INTR */

/********** End of block of Cyclades-Z specific code *********/
/***********************************************************/

/* This is called whenever a port becomes active;
   interrupts are enabled and DTR & RTS are turned on.
 */
static int startup(struct cyclades_port *info)
{
	unsigned long flags;
	int retval = 0;
	void __iomem *base_addr;
	int card, chip, channel, index;
	unsigned long page;

	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);

	page = get_zeroed_page(GFP_KERNEL);
	if (!page)
		return -ENOMEM;

	CY_LOCK(info, flags);

	if (info->flags & ASYNC_INITIALIZED) {
		free_page(page);
		goto errout;
	}

	if (!info->type) {
		if (info->tty) {
			set_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		free_page(page);
		goto errout;
	}

	if (info->xmit_buf)
		free_page(page);
	else
		info->xmit_buf = (unsigned char *)page;

	CY_UNLOCK(info, flags);

	set_line_char(info);

	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr = cy_card[card].base_addr +
				(cy_chip_offset[chip] << index);

#ifdef CY_DEBUG_OPEN
		printk("cyc startup card %d, chip %d, channel %d, "
				"base_addr %lx\n",
				card, chip, channel, (long)base_addr);
		/**/
#endif
		CY_LOCK(info, flags);

		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);

		cy_writeb(base_addr + (CyRTPR << index),
			(info->default_timeout ? info->default_timeout : 0x02));
		/* 10ms rx timeout */

		cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
				index);

		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
		cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
		cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);

#ifdef CY_DEBUG_DTR
		printk("cyc:startup raising DTR\n");
		printk("     status: 0x%x, 0x%x\n",
			cy_readb(base_addr + (CyMSVR1 << index)),
			cy_readb(base_addr + (CyMSVR2 << index)));
#endif

		cy_writeb(base_addr + (CySRER << index),
			cy_readb(base_addr + (CySRER << index)) | CyRxData);
		info->flags |= ASYNC_INITIALIZED;

		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
		info->breakon = info->breakoff = 0;
		memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
		info->idle_stats.in_use =
		info->idle_stats.recv_idle =
		info->idle_stats.xmit_idle = jiffies;

		CY_UNLOCK(info, flags);

	} else {
		struct FIRM_ID __iomem *firm_id;
		struct ZFW_CTRL __iomem *zfw_ctrl;
		struct BOARD_CTRL __iomem *board_ctrl;
		struct CH_CTRL __iomem *ch_ctrl;
		int retval;

		base_addr = cy_card[card].base_addr;

		firm_id = base_addr + ID_ADDRESS;
		if (!ISZLOADED(cy_card[card])) {
			return -ENODEV;
		}

		zfw_ctrl = cy_card[card].base_addr +
				(cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = zfw_ctrl->ch_ctrl;

#ifdef CY_DEBUG_OPEN
		printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
			card, channel, (long)base_addr);
		/**/
#endif
		CY_LOCK(info, flags);

		cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
#ifdef Z_WAKE
#ifdef CONFIG_CYZ_INTR
		cy_writel(&ch_ctrl[channel].intr_enable,
			  C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
			  C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
#else
		cy_writel(&ch_ctrl[channel].intr_enable,
			  C_IN_IOCTLW | C_IN_MDCD);
#endif				/* CONFIG_CYZ_INTR */
#else
#ifdef CONFIG_CYZ_INTR
		cy_writel(&ch_ctrl[channel].intr_enable,
			  C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
			  C_IN_RXNNDT | C_IN_MDCD);
#else
		cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
#endif				/* CONFIG_CYZ_INTR */
#endif				/* Z_WAKE */

		retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
		if (retval != 0) {
			printk("cyc:startup(1) retval on ttyC%d was %x\n",
				info->line, retval);
		}

		/* Flush RX buffers before raising DTR and RTS */
		retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
				0L);
		if (retval != 0) {
			printk("cyc:startup(2) retval on ttyC%d was %x\n",
				info->line, retval);
		}

		/* set timeout !!! */
		/* set RTS and DTR !!! */
		cy_writel(&ch_ctrl[channel].rs_control,
			cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
			C_RS_DTR);
		retval = cyz_issue_cmd(&cy_card[info->card], channel,
				C_CM_IOCTLM, 0L);
		if (retval != 0) {
			printk("cyc:startup(3) retval on ttyC%d was %x\n",
				info->line, retval);
		}
#ifdef CY_DEBUG_DTR
		printk("cyc:startup raising Z DTR\n");
#endif

		/* enable send, recv, modem !!! */

		info->flags |= ASYNC_INITIALIZED;
		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
		info->breakon = info->breakoff = 0;
		memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
		info->idle_stats.in_use =
		info->idle_stats.recv_idle =
		info->idle_stats.xmit_idle = jiffies;

		CY_UNLOCK(info, flags);
	}

#ifdef CY_DEBUG_OPEN
	printk(" cyc startup done\n");
#endif
	return 0;

errout:
	CY_UNLOCK(info, flags);
	return retval;
}				/* startup */

static void start_xmit(struct cyclades_port *info)
{
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;

	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr = cy_card[card].base_addr +
				(cy_chip_offset[chip] << index);

		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), channel);
		cy_writeb(base_addr + (CySRER << index),
			cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
		CY_UNLOCK(info, flags);
	} else {
#ifdef CONFIG_CYZ_INTR
		int retval;

		CY_LOCK(info, flags);
		retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
				0L);
		if (retval != 0) {
			printk("cyc:start_xmit retval on ttyC%d was %x\n",
				info->line, retval);
		}
		CY_UNLOCK(info, flags);
#else				/* CONFIG_CYZ_INTR */
		/* Don't have to do anything at this time */
#endif				/* CONFIG_CYZ_INTR */
	}
}				/* start_xmit */

/*
 * This routine shuts down a serial port; interrupts are disabled,
 * and DTR is dropped if the hangup on close termio flag is on.
 */
static void shutdown(struct cyclades_port *info)
{
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;

	if (!(info->flags & ASYNC_INITIALIZED)) {
		return;
	}

	card = info->card;
	channel = info->line - cy_card[card].first_line;
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr = cy_card[card].base_addr +
				(cy_chip_offset[chip] << index);

#ifdef CY_DEBUG_OPEN
		printk("cyc shutdown Y card %d, chip %d, channel %d, "
				"base_addr %lx\n",
				card, chip, channel, (long)base_addr);
#endif

		CY_LOCK(info, flags);

		/* Clear delta_msr_wait queue to avoid mem leaks. */
		wake_up_interruptible(&info->delta_msr_wait);

		if (info->xmit_buf) {
			unsigned char *temp;
			temp = info->xmit_buf;
			info->xmit_buf = NULL;
			free_page((unsigned long)temp);
		}
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
		if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
			cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
			cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
#ifdef CY_DEBUG_DTR
			printk("cyc shutdown dropping DTR\n");
			printk("     status: 0x%x, 0x%x\n",
				cy_readb(base_addr + (CyMSVR1 << index)),
				cy_readb(base_addr + (CyMSVR2 << index)));
#endif
		}
		cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
		/* it may be appropriate to clear _XMIT at
		   some later date (after testing)!!! */

		if (info->tty) {
			set_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		info->flags &= ~ASYNC_INITIALIZED;
		CY_UNLOCK(info, flags);
	} else {
		struct FIRM_ID __iomem *firm_id;
		struct ZFW_CTRL __iomem *zfw_ctrl;
		struct BOARD_CTRL __iomem *board_ctrl;
		struct CH_CTRL __iomem *ch_ctrl;
		int retval;

		base_addr = cy_card[card].base_addr;
#ifdef CY_DEBUG_OPEN
		printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
			card, channel, (long)base_addr);
#endif

		firm_id = base_addr + ID_ADDRESS;
		if (!ISZLOADED(cy_card[card])) {
			return;
		}

		zfw_ctrl = cy_card[card].base_addr +
				(cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = zfw_ctrl->ch_ctrl;

		CY_LOCK(info, flags);

		if (info->xmit_buf) {
			unsigned char *temp;
			temp = info->xmit_buf;
			info->xmit_buf = NULL;
			free_page((unsigned long)temp);
		}

		if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
			cy_writel(&ch_ctrl[channel].rs_control,
				(__u32)(cy_readl(&ch_ctrl[channel].rs_control)&
					~(C_RS_RTS | C_RS_DTR)));
			retval = cyz_issue_cmd(&cy_card[info->card], channel,
					C_CM_IOCTLM, 0L);
			if (retval != 0) {
				printk("cyc:shutdown retval on ttyC%d was %x\n",
					info->line, retval);
			}
#ifdef CY_DEBUG_DTR
			printk("cyc:shutdown dropping Z DTR\n");
#endif
		}

		if (info->tty) {
			set_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		info->flags &= ~ASYNC_INITIALIZED;

		CY_UNLOCK(info, flags);
	}

#ifdef CY_DEBUG_OPEN
	printk(" cyc shutdown done\n");
#endif
}				/* shutdown */

/*
 * ------------------------------------------------------------
 * cy_open() and friends
 * ------------------------------------------------------------
 */

static int
block_til_ready(struct tty_struct *tty, struct file *filp,
		struct cyclades_port *info)
{
	DECLARE_WAITQUEUE(wait, current);
	struct cyclades_card *cinfo;
	unsigned long flags;
	int chip, channel, index;
	int retval;
	void __iomem *base_addr;

	cinfo = &cy_card[info->card];
	channel = info->line - cinfo->first_line;

	/*
	 * If the device is in the middle of being closed, then block
	 * until it's done, and then try again.
	 */
	if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
		if (info->flags & ASYNC_CLOSING) {
			interruptible_sleep_on(&info->close_wait);
		}
		return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
	}

	/*
	 * If non-blocking mode is set, then make the check up front
	 * and then exit.
	 */
	if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
		info->flags |= ASYNC_NORMAL_ACTIVE;
		return 0;
	}

	/*
	 * Block waiting for the carrier detect and the line to become
	 * free (i.e., not in use by the callout).  While we are in
	 * this loop, info->count is dropped by one, so that
	 * cy_close() knows when to free things.  We restore it upon
	 * exit, either normal or abnormal.
	 */
	retval = 0;
	add_wait_queue(&info->open_wait, &wait);
#ifdef CY_DEBUG_OPEN
	printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
		info->line, info->count);
	/**/
#endif
	CY_LOCK(info, flags);
	if (!tty_hung_up_p(filp))
		info->count--;
	CY_UNLOCK(info, flags);
#ifdef CY_DEBUG_COUNT
	printk("cyc block_til_ready: (%d): decrementing count to %d\n",
		current->pid, info->count);
#endif
	info->blocked_open++;

	if (!IS_CYC_Z(*cinfo)) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cinfo->bus_index;
		base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);

		while (1) {
			CY_LOCK(info, flags);
			if ((tty->termios->c_cflag & CBAUD)) {
				cy_writeb(base_addr + (CyCAR << index),
					  (u_char) channel);
				cy_writeb(base_addr + (CyMSVR1 << index),
					  CyRTS);
				cy_writeb(base_addr + (CyMSVR2 << index),
					  CyDTR);
#ifdef CY_DEBUG_DTR
				printk("cyc:block_til_ready raising DTR\n");
				printk("     status: 0x%x, 0x%x\n",
					cy_readb(base_addr +
						(CyMSVR1 << index)),
					cy_readb(base_addr +
						(CyMSVR2 << index)));
#endif
			}
			CY_UNLOCK(info, flags);

			set_current_state(TASK_INTERRUPTIBLE);
			if (tty_hung_up_p(filp) ||
					!(info->flags & ASYNC_INITIALIZED)) {
				retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
					  -EAGAIN : -ERESTARTSYS);
				break;
			}

			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
					(cy_readb(base_addr +
						(CyMSVR1 << index)) & CyDCD))) {
				CY_UNLOCK(info, flags);
				break;
			}
			CY_UNLOCK(info, flags);

			if (signal_pending(current)) {
				retval = -ERESTARTSYS;
				break;
			}
#ifdef CY_DEBUG_OPEN
			printk("cyc block_til_ready blocking: ttyC%d, "
					"count = %d\n",
					info->line, info->count);
			/**/
#endif
			schedule();
		}
	} else {
		struct FIRM_ID __iomem *firm_id;
		struct ZFW_CTRL __iomem *zfw_ctrl;
		struct BOARD_CTRL __iomem *board_ctrl;
		struct CH_CTRL __iomem *ch_ctrl;
		int retval;

		base_addr = cinfo->base_addr;
		firm_id = base_addr + ID_ADDRESS;
		if (!ISZLOADED(*cinfo)) {
			current->state = TASK_RUNNING;
			remove_wait_queue(&info->open_wait, &wait);
			return -EINVAL;
		}

		zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
				0xfffff);
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = zfw_ctrl->ch_ctrl;

		while (1) {
			if ((tty->termios->c_cflag & CBAUD)) {
				cy_writel(&ch_ctrl[channel].rs_control,
					  cy_readl(&ch_ctrl[channel].
						   rs_control) | (C_RS_RTS |
								  C_RS_DTR));
				retval = cyz_issue_cmd(&cy_card[info->card],
						channel, C_CM_IOCTLM, 0L);
				if (retval != 0) {
					printk("cyc:block_til_ready retval on "
						"ttyC%d was %x\n",
						info->line, retval);
				}
#ifdef CY_DEBUG_DTR
				printk("cyc:block_til_ready raising Z DTR\n");
#endif
			}

			set_current_state(TASK_INTERRUPTIBLE);
			if (tty_hung_up_p(filp) ||
					!(info->flags & ASYNC_INITIALIZED)) {
				retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
					  -EAGAIN : -ERESTARTSYS);
				break;
			}
			if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
					(cy_readl(&ch_ctrl[channel].rs_status) &
						C_RS_DCD))) {
				break;
			}
			if (signal_pending(current)) {
				retval = -ERESTARTSYS;
				break;
			}
#ifdef CY_DEBUG_OPEN
			printk("cyc block_til_ready blocking: ttyC%d, "
					"count = %d\n",
					info->line, info->count);
			/**/
#endif
			schedule();
		}
	}
	current->state = TASK_RUNNING;
	remove_wait_queue(&info->open_wait, &wait);
	if (!tty_hung_up_p(filp)) {
		info->count++;
#ifdef CY_DEBUG_COUNT
		printk("cyc:block_til_ready (%d): incrementing count to %d\n",
			current->pid, info->count);
#endif
	}
	info->blocked_open--;
#ifdef CY_DEBUG_OPEN
	printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
		info->line, info->count);
	/**/
#endif
	if (retval)
		return retval;
	info->flags |= ASYNC_NORMAL_ACTIVE;
	return 0;
}				/* block_til_ready */

/*
 * This routine is called whenever a serial port is opened.  It
 * performs the serial-specific initialization for the tty structure.
 */
static int cy_open(struct tty_struct *tty, struct file *filp)
{
	struct cyclades_port *info;
	int retval, line;

	line = tty->index;
	if ((line < 0) || (NR_PORTS <= line)) {
		return -ENODEV;
	}
	info = &cy_port[line];
	if (info->line < 0) {
		return -ENODEV;
	}

	/* If the card's firmware hasn't been loaded,
	   treat it as absent from the system.  This
	   will make the user pay attention.
	 */
	if (IS_CYC_Z(cy_card[info->card])) {
		struct cyclades_card *cinfo = &cy_card[info->card];
		struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;

		if (!ISZLOADED(*cinfo)) {
			if (((ZE_V1 == cy_readl(
					&((struct RUNTIME_9060 __iomem *)
					 (cinfo->ctl_addr))->mail_box_0)) &&
					Z_FPGA_CHECK(*cinfo)) &&
					(ZFIRM_HLT == cy_readl(
						&firm_id->signature))) {
				printk("cyc:Cyclades-Z Error: you need an "
					"external power supply for this number "
					"of ports.\n\rFirmware halted.\r\n");
			} else {
				printk("cyc:Cyclades-Z firmware not yet "
					"loaded\n");
			}
			return -ENODEV;
		}
#ifdef CONFIG_CYZ_INTR
		else {
		/* In case this Z board is operating in interrupt mode, its
		   interrupts should be enabled as soon as the first open
		   happens to one of its ports. */
			if (!cinfo->intr_enabled) {
				struct ZFW_CTRL __iomem *zfw_ctrl;
				struct BOARD_CTRL __iomem *board_ctrl;

				zfw_ctrl = cinfo->base_addr +
					(cy_readl(&firm_id->zfwctrl_addr) &
						0xfffff);

				board_ctrl = &zfw_ctrl->board_ctrl;

				/* Enable interrupts on the PLX chip */
				cy_writew(cinfo->ctl_addr + 0x68,
					  cy_readw(cinfo->ctl_addr +
						   0x68) | 0x0900);
				/* Enable interrupts on the FW */
				retval = cyz_issue_cmd(cinfo, 0,
						C_CM_IRQ_ENBL, 0L);
				if (retval != 0) {
					printk("cyc:IRQ enable retval was %x\n",
						retval);
				}
				cinfo->nports =
					(int)cy_readl(&board_ctrl->n_channel);
				cinfo->intr_enabled = 1;
			}
		}
#endif				/* CONFIG_CYZ_INTR */
		/* Make sure this Z port really exists in hardware */
		if (info->line > (cinfo->first_line + cinfo->nports - 1))
			return -ENODEV;
	}
#ifdef CY_DEBUG_OTHER
	printk("cyc:cy_open ttyC%d\n", info->line);	/* */
#endif
	tty->driver_data = info;
	info->tty = tty;
	if (serial_paranoia_check(info, tty->name, "cy_open")) {
		return -ENODEV;
	}
#ifdef CY_DEBUG_OPEN
	printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
	/**/
#endif
	info->count++;
#ifdef CY_DEBUG_COUNT
	printk("cyc:cy_open (%d): incrementing count to %d\n",
		current->pid, info->count);
#endif

	/*
	 * If the port is the middle of closing, bail out now
	 */
	if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
		if (info->flags & ASYNC_CLOSING)
			interruptible_sleep_on(&info->close_wait);
		return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
	}

	/*
	 * Start up serial port
	 */
	retval = startup(info);
	if (retval) {
		return retval;
	}

	retval = block_til_ready(tty, filp, info);
	if (retval) {
#ifdef CY_DEBUG_OPEN
		printk("cyc:cy_open returning after block_til_ready with %d\n",
			retval);
#endif
		return retval;
	}

	info->throttle = 0;

#ifdef CY_DEBUG_OPEN
	printk(" cyc:cy_open done\n");
	/**/
#endif
	return 0;
}				/* cy_open */

/*
 * cy_wait_until_sent() --- wait until the transmitter is empty
 */
static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	void __iomem *base_addr;
	int card, chip, channel, index;
	unsigned long orig_jiffies;
	int char_time;

	if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
		return;

	if (info->xmit_fifo_size == 0)
		return;		/* Just in case.... */

	orig_jiffies = jiffies;
	/*
	 * Set the check interval to be 1/5 of the estimated time to
	 * send a single character, and make it at least 1.  The check
	 * interval should also be less than the timeout.
	 *
	 * Note: we have to use pretty tight timings here to satisfy
	 * the NIST-PCTS.
	 */
	char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
	char_time = char_time / 5;
	if (char_time <= 0)
		char_time = 1;
	if (timeout < 0)
		timeout = 0;
	if (timeout)
		char_time = min(char_time, timeout);
	/*
	 * If the transmitter hasn't cleared in twice the approximate
	 * amount of time to send the entire FIFO, it probably won't
	 * ever clear.  This assumes the UART isn't doing flow
	 * control, which is currently the case.  Hence, if it ever
	 * takes longer than info->timeout, this is probably due to a
	 * UART bug of some kind.  So, we clamp the timeout parameter at
	 * 2*info->timeout.
	 */
	if (!timeout || timeout > 2 * info->timeout)
		timeout = 2 * info->timeout;
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
	printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
	printk("jiff=%lu...", jiffies);
#endif
	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);
		while (cy_readb(base_addr + (CySRER << index)) & CyTxRdy) {
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
			printk("Not clean (jiff=%lu)...", jiffies);
#endif
			if (msleep_interruptible(jiffies_to_msecs(char_time)))
				break;
			if (timeout && time_after(jiffies, orig_jiffies +
					timeout))
				break;
		}
	} else {
		/* Nothing to do! */
	}
	/* Run one more char cycle */
	msleep_interruptible(jiffies_to_msecs(char_time * 5));
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
	printk("Clean (jiff=%lu)...done\n", jiffies);
#endif
}

/*
 * This routine is called when a particular tty device is closed.
 */
static void cy_close(struct tty_struct *tty, struct file *filp)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	unsigned long flags;

#ifdef CY_DEBUG_OTHER
	printk("cyc:cy_close ttyC%d\n", info->line);
#endif

	if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
		return;
	}

	CY_LOCK(info, flags);
	/* If the TTY is being hung up, nothing to do */
	if (tty_hung_up_p(filp)) {
		CY_UNLOCK(info, flags);
		return;
	}
#ifdef CY_DEBUG_OPEN
	printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
#endif
	if ((tty->count == 1) && (info->count != 1)) {
		/*
		 * Uh, oh.  tty->count is 1, which means that the tty
		 * structure will be freed.  Info->count should always
		 * be one in these conditions.  If it's greater than
		 * one, we've got real problems, since it means the
		 * serial port won't be shutdown.
		 */
		printk("cyc:cy_close: bad serial port count; tty->count is 1, "
			"info->count is %d\n", info->count);
		info->count = 1;
	}
#ifdef CY_DEBUG_COUNT
	printk("cyc:cy_close at (%d): decrementing count to %d\n",
		current->pid, info->count - 1);
#endif
	if (--info->count < 0) {
#ifdef CY_DEBUG_COUNT
		printk("cyc:cyc_close setting count to 0\n");
#endif
		info->count = 0;
	}
	if (info->count) {
		CY_UNLOCK(info, flags);
		return;
	}
	info->flags |= ASYNC_CLOSING;

	/*
	 * Now we wait for the transmit buffer to clear; and we notify
	 * the line discipline to only process XON/XOFF characters.
	 */
	tty->closing = 1;
	CY_UNLOCK(info, flags);
	if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
		tty_wait_until_sent(tty, info->closing_wait);
	}
	CY_LOCK(info, flags);

	if (!IS_CYC_Z(cy_card[info->card])) {
		int channel = info->line - cy_card[info->card].first_line;
		int index = cy_card[info->card].bus_index;
		void __iomem *base_addr = cy_card[info->card].base_addr +
			(cy_chip_offset[channel >> 2] << index);
		/* Stop accepting input */
		channel &= 0x03;
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
		cy_writeb(base_addr + (CySRER << index),
			  cy_readb(base_addr + (CySRER << index)) & ~CyRxData);
		if (info->flags & ASYNC_INITIALIZED) {
			/* Waiting for on-board buffers to be empty before closing
			   the port */
			CY_UNLOCK(info, flags);
			cy_wait_until_sent(tty, info->timeout);
			CY_LOCK(info, flags);
		}
	} else {
#ifdef Z_WAKE
		/* Waiting for on-board buffers to be empty before closing the port */
		void __iomem *base_addr = cy_card[info->card].base_addr;
		struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
		struct ZFW_CTRL __iomem *zfw_ctrl =
		    base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
		struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
		int channel = info->line - cy_card[info->card].first_line;
		int retval;

		if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
			retval = cyz_issue_cmd(&cy_card[info->card], channel,
						C_CM_IOCTLW, 0L);
			if (retval != 0) {
				printk("cyc:cy_close retval on ttyC%d was %x\n",
					info->line, retval);
			}
			CY_UNLOCK(info, flags);
			interruptible_sleep_on(&info->shutdown_wait);
			CY_LOCK(info, flags);
		}
#endif
	}

	CY_UNLOCK(info, flags);
	shutdown(info);
	if (tty->driver->flush_buffer)
		tty->driver->flush_buffer(tty);
	tty_ldisc_flush(tty);
	CY_LOCK(info, flags);

	tty->closing = 0;
	info->event = 0;
	info->tty = NULL;
	if (info->blocked_open) {
		CY_UNLOCK(info, flags);
		if (info->close_delay) {
			msleep_interruptible(jiffies_to_msecs
						(info->close_delay));
		}
		wake_up_interruptible(&info->open_wait);
		CY_LOCK(info, flags);
	}
	info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
	wake_up_interruptible(&info->close_wait);

#ifdef CY_DEBUG_OTHER
	printk(" cyc:cy_close done\n");
#endif

	CY_UNLOCK(info, flags);
}				/* cy_close */

/* This routine gets called when tty_write has put something into
 * the write_queue.  The characters may come from user space or
 * kernel space.
 *
 * This routine will return the number of characters actually
 * accepted for writing.
 *
 * If the port is not already transmitting stuff, start it off by
 * enabling interrupts.  The interrupt service routine will then
 * ensure that the characters are sent.
 * If the port is already active, there is no need to kick it.
 *
 */
static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	unsigned long flags;
	int c, ret = 0;

#ifdef CY_DEBUG_IO
	printk("cyc:cy_write ttyC%d\n", info->line);	/* */
#endif

	if (serial_paranoia_check(info, tty->name, "cy_write")) {
		return 0;
	}

	if (!info->xmit_buf)
		return 0;

	CY_LOCK(info, flags);
	while (1) {
		c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
				   (int)(SERIAL_XMIT_SIZE - info->xmit_head)));

		if (c <= 0)
			break;

		memcpy(info->xmit_buf + info->xmit_head, buf, c);
		info->xmit_head = (info->xmit_head + c) &
			(SERIAL_XMIT_SIZE - 1);
		info->xmit_cnt += c;
		buf += c;
		count -= c;
		ret += c;
	}
	CY_UNLOCK(info, flags);

	info->idle_stats.xmit_bytes += ret;
	info->idle_stats.xmit_idle = jiffies;

	if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
		start_xmit(info);
	}
	return ret;
}				/* cy_write */

/*
 * This routine is called by the kernel to write a single
 * character to the tty device.  If the kernel uses this routine,
 * it must call the flush_chars() routine (if defined) when it is
 * done stuffing characters into the driver.  If there is no room
 * in the queue, the character is ignored.
 */
static void cy_put_char(struct tty_struct *tty, unsigned char ch)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	unsigned long flags;

#ifdef CY_DEBUG_IO
	printk("cyc:cy_put_char ttyC%d\n", info->line);
#endif

	if (serial_paranoia_check(info, tty->name, "cy_put_char"))
		return;

	if (!info->xmit_buf)
		return;

	CY_LOCK(info, flags);
	if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
		CY_UNLOCK(info, flags);
		return;
	}

	info->xmit_buf[info->xmit_head++] = ch;
	info->xmit_head &= SERIAL_XMIT_SIZE - 1;
	info->xmit_cnt++;
	info->idle_stats.xmit_bytes++;
	info->idle_stats.xmit_idle = jiffies;
	CY_UNLOCK(info, flags);
}				/* cy_put_char */

/*
 * This routine is called by the kernel after it has written a
 * series of characters to the tty device using put_char().  
 */
static void cy_flush_chars(struct tty_struct *tty)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;

#ifdef CY_DEBUG_IO
	printk("cyc:cy_flush_chars ttyC%d\n", info->line);	/* */
#endif

	if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
		return;

	if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
			!info->xmit_buf)
		return;

	start_xmit(info);
}				/* cy_flush_chars */

/*
 * This routine returns the numbers of characters the tty driver
 * will accept for queuing to be written.  This number is subject
 * to change as output buffers get emptied, or if the output flow
 * control is activated.
 */
static int cy_write_room(struct tty_struct *tty)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	int ret;

#ifdef CY_DEBUG_IO
	printk("cyc:cy_write_room ttyC%d\n", info->line);	/* */
#endif

	if (serial_paranoia_check(info, tty->name, "cy_write_room"))
		return 0;
	ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
	if (ret < 0)
		ret = 0;
	return ret;
}				/* cy_write_room */

static int cy_chars_in_buffer(struct tty_struct *tty)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	int card, channel;

	if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
		return 0;

	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);

#ifdef Z_EXT_CHARS_IN_BUFFER
	if (!IS_CYC_Z(cy_card[card])) {
#endif				/* Z_EXT_CHARS_IN_BUFFER */
#ifdef CY_DEBUG_IO
		printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt);	/* */
#endif
		return info->xmit_cnt;
#ifdef Z_EXT_CHARS_IN_BUFFER
	} else {
		static volatile struct FIRM_ID *firm_id;
		static volatile struct ZFW_CTRL *zfw_ctrl;
		static volatile struct CH_CTRL *ch_ctrl;
		static volatile struct BUF_CTRL *buf_ctrl;
		int char_count;
		volatile __u32 tx_put, tx_get, tx_bufsize;

		firm_id = cy_card[card].base_addr + ID_ADDRESS;
		zfw_ctrl = cy_card[card].base_addr +
			(cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
		ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
		buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);

		tx_get = cy_readl(&buf_ctrl->tx_get);
		tx_put = cy_readl(&buf_ctrl->tx_put);
		tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
		if (tx_put >= tx_get)
			char_count = tx_put - tx_get;
		else
			char_count = tx_put - tx_get + tx_bufsize;
#ifdef CY_DEBUG_IO
		printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count);	/* */
#endif
		return info->xmit_cnt + char_count;
	}
#endif				/* Z_EXT_CHARS_IN_BUFFER */
}				/* cy_chars_in_buffer */

/*
 * ------------------------------------------------------------
 * cy_ioctl() and friends
 * ------------------------------------------------------------
 */

static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
{
	int co, co_val, bpr;
	__u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
			25000000);

	if (baud == 0) {
		info->tbpr = info->tco = info->rbpr = info->rco = 0;
		return;
	}

	/* determine which prescaler to use */
	for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
		if (cy_clock / co_val / baud > 63)
			break;
	}

	bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
	if (bpr > 255)
		bpr = 255;

	info->tbpr = info->rbpr = bpr;
	info->tco = info->rco = co;
}

/*
 * This routine finds or computes the various line characteristics.
 * It used to be called config_setup
 */
static void set_line_char(struct cyclades_port *info)
{
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;
	unsigned cflag, iflag;
	unsigned short chip_number;
	int baud, baud_rate = 0;
	int i;

	if (!info->tty || !info->tty->termios) {
		return;
	}
	if (info->line == -1) {
		return;
	}
	cflag = info->tty->termios->c_cflag;
	iflag = info->tty->termios->c_iflag;

	/*
	 * Set up the tty->alt_speed kludge
	 */
	if (info->tty) {
		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
			info->tty->alt_speed = 57600;
		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
			info->tty->alt_speed = 115200;
		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
			info->tty->alt_speed = 230400;
		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
			info->tty->alt_speed = 460800;
	}

	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
	chip_number = channel / 4;

	if (!IS_CYC_Z(cy_card[card])) {

		index = cy_card[card].bus_index;

		/* baud rate */
		baud = tty_get_baud_rate(info->tty);
		if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
				ASYNC_SPD_CUST) {
			if (info->custom_divisor)
				baud_rate = info->baud / info->custom_divisor;
			else
				baud_rate = info->baud;
		} else if (baud > CD1400_MAX_SPEED) {
			baud = CD1400_MAX_SPEED;
		}
		/* find the baud index */
		for (i = 0; i < 20; i++) {
			if (baud == baud_table[i]) {
				break;
			}
		}
		if (i == 20) {
			i = 19;	/* CD1400_MAX_SPEED */
		}

		if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
				ASYNC_SPD_CUST) {
			cyy_baud_calc(info, baud_rate);
		} else {
			if (info->chip_rev >= CD1400_REV_J) {
				/* It is a CD1400 rev. J or later */
				info->tbpr = baud_bpr_60[i];	/* Tx BPR */
				info->tco = baud_co_60[i];	/* Tx CO */
				info->rbpr = baud_bpr_60[i];	/* Rx BPR */
				info->rco = baud_co_60[i];	/* Rx CO */
			} else {
				info->tbpr = baud_bpr_25[i];	/* Tx BPR */
				info->tco = baud_co_25[i];	/* Tx CO */
				info->rbpr = baud_bpr_25[i];	/* Rx BPR */
				info->rco = baud_co_25[i];	/* Rx CO */
			}
		}
		if (baud_table[i] == 134) {
			/* get it right for 134.5 baud */
			info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
					2;
		} else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
				ASYNC_SPD_CUST) {
			info->timeout = (info->xmit_fifo_size * HZ * 15 /
					baud_rate) + 2;
		} else if (baud_table[i]) {
			info->timeout = (info->xmit_fifo_size * HZ * 15 /
					baud_table[i]) + 2;
			/* this needs to be propagated into the card info */
		} else {
			info->timeout = 0;
		}
		/* By tradition (is it a standard?) a baud rate of zero
		   implies the line should be/has been closed.  A bit
		   later in this routine such a test is performed. */

		/* byte size and parity */
		info->cor5 = 0;
		info->cor4 = 0;
		/* receive threshold */
		info->cor3 = (info->default_threshold ?
				info->default_threshold : baud_cor3[i]);
		info->cor2 = CyETC;
		switch (cflag & CSIZE) {
		case CS5:
			info->cor1 = Cy_5_BITS;
			break;
		case CS6:
			info->cor1 = Cy_6_BITS;
			break;
		case CS7:
			info->cor1 = Cy_7_BITS;
			break;
		case CS8:
			info->cor1 = Cy_8_BITS;
			break;
		}
		if (cflag & CSTOPB) {
			info->cor1 |= Cy_2_STOP;
		}
		if (cflag & PARENB) {
			if (cflag & PARODD) {
				info->cor1 |= CyPARITY_O;
			} else {
				info->cor1 |= CyPARITY_E;
			}
		} else {
			info->cor1 |= CyPARITY_NONE;
		}

		/* CTS flow control flag */
		if (cflag & CRTSCTS) {
			info->flags |= ASYNC_CTS_FLOW;
			info->cor2 |= CyCtsAE;
		} else {
			info->flags &= ~ASYNC_CTS_FLOW;
			info->cor2 &= ~CyCtsAE;
		}
		if (cflag & CLOCAL)
			info->flags &= ~ASYNC_CHECK_CD;
		else
			info->flags |= ASYNC_CHECK_CD;

	 /***********************************************
	    The hardware option, CyRtsAO, presents RTS when
	    the chip has characters to send.  Since most modems
	    use RTS as reverse (inbound) flow control, this
	    option is not used.  If inbound flow control is
	    necessary, DTR can be programmed to provide the
	    appropriate signals for use with a non-standard
	    cable.  Contact Marcio Saito for details.
	 ***********************************************/

		chip = channel >> 2;
		channel &= 0x03;
		base_addr = cy_card[card].base_addr +
			(cy_chip_offset[chip] << index);

		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);

		/* tx and rx baud rate */

		cy_writeb(base_addr + (CyTCOR << index), info->tco);
		cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
		cy_writeb(base_addr + (CyRCOR << index), info->rco);
		cy_writeb(base_addr + (CyRBPR << index), info->rbpr);

		/* set line characteristics  according configuration */

		cy_writeb(base_addr + (CySCHR1 << index),
			  START_CHAR(info->tty));
		cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
		cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
		cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
		cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
		cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
		cy_writeb(base_addr + (CyCOR5 << index), info->cor5);

		cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
				CyCOR3ch, index);

		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);	/* !!! Is this needed? */
		cy_writeb(base_addr + (CyRTPR << index),
			(info->default_timeout ? info->default_timeout : 0x02));
		/* 10ms rx timeout */

		if (C_CLOCAL(info->tty)) {
			/* without modem intr */
			cy_writeb(base_addr + (CySRER << index),
				  cy_readb(base_addr +
					   (CySRER << index)) | CyMdmCh);
			/* act on 1->0 modem transitions */
			if ((cflag & CRTSCTS) && info->rflow) {
				cy_writeb(base_addr + (CyMCOR1 << index),
					  (CyCTS | rflow_thr[i]));
			} else {
				cy_writeb(base_addr + (CyMCOR1 << index),
					  CyCTS);
			}
			/* act on 0->1 modem transitions */
			cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
		} else {
			/* without modem intr */
			cy_writeb(base_addr + (CySRER << index),
				  cy_readb(base_addr +
					   (CySRER << index)) | CyMdmCh);
			/* act on 1->0 modem transitions */
			if ((cflag & CRTSCTS) && info->rflow) {
				cy_writeb(base_addr + (CyMCOR1 << index),
					  (CyDSR | CyCTS | CyRI | CyDCD |
					   rflow_thr[i]));
			} else {
				cy_writeb(base_addr + (CyMCOR1 << index),
					  CyDSR | CyCTS | CyRI | CyDCD);
			}
			/* act on 0->1 modem transitions */
			cy_writeb(base_addr + (CyMCOR2 << index),
				  CyDSR | CyCTS | CyRI | CyDCD);
		}

		if (i == 0) {	/* baud rate is zero, turn off line */
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  ~CyRTS);
			} else {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  ~CyDTR);
			}
#ifdef CY_DEBUG_DTR
			printk("cyc:set_line_char dropping DTR\n");
			printk("     status: 0x%x, 0x%x\n",
				cy_readb(base_addr + (CyMSVR1 << index)),
				cy_readb(base_addr + (CyMSVR2 << index)));
#endif
		} else {
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  CyRTS);
			} else {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  CyDTR);
			}
#ifdef CY_DEBUG_DTR
			printk("cyc:set_line_char raising DTR\n");
			printk("     status: 0x%x, 0x%x\n",
				cy_readb(base_addr + (CyMSVR1 << index)),
				cy_readb(base_addr + (CyMSVR2 << index)));
#endif
		}

		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		CY_UNLOCK(info, flags);

	} else {
		struct FIRM_ID __iomem *firm_id;
		struct ZFW_CTRL __iomem *zfw_ctrl;
		struct BOARD_CTRL __iomem *board_ctrl;
		struct CH_CTRL __iomem *ch_ctrl;
		struct BUF_CTRL __iomem *buf_ctrl;
		__u32 sw_flow;
		int retval;

		firm_id = cy_card[card].base_addr + ID_ADDRESS;
		if (!ISZLOADED(cy_card[card])) {
			return;
		}

		zfw_ctrl = cy_card[card].base_addr +
			(cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
		buf_ctrl = &zfw_ctrl->buf_ctrl[channel];

		/* baud rate */
		baud = tty_get_baud_rate(info->tty);
		if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
				ASYNC_SPD_CUST) {
			if (info->custom_divisor)
				baud_rate = info->baud / info->custom_divisor;
			else
				baud_rate = info->baud;
		} else if (baud > CYZ_MAX_SPEED) {
			baud = CYZ_MAX_SPEED;
		}
		cy_writel(&ch_ctrl->comm_baud, baud);

		if (baud == 134) {
			/* get it right for 134.5 baud */
			info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
					2;
		} else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
				ASYNC_SPD_CUST) {
			info->timeout = (info->xmit_fifo_size * HZ * 15 /
					baud_rate) + 2;
		} else if (baud) {
			info->timeout = (info->xmit_fifo_size * HZ * 15 /
					baud) + 2;
			/* this needs to be propagated into the card info */
		} else {
			info->timeout = 0;
		}

		/* byte size and parity */
		switch (cflag & CSIZE) {
		case CS5:
			cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
			break;
		case CS6:
			cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
			break;
		case CS7:
			cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
			break;
		case CS8:
			cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
			break;
		}
		if (cflag & CSTOPB) {
			cy_writel(&ch_ctrl->comm_data_l,
				  cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
		} else {
			cy_writel(&ch_ctrl->comm_data_l,
				  cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
		}
		if (cflag & PARENB) {
			if (cflag & PARODD) {
				cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
			} else {
				cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
			}
		} else {
			cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
		}

		/* CTS flow control flag */
		if (cflag & CRTSCTS) {
			cy_writel(&ch_ctrl->hw_flow,
				  cy_readl(&ch_ctrl->
					   hw_flow) | C_RS_CTS | C_RS_RTS);
		} else {
			cy_writel(&ch_ctrl->hw_flow,
				  cy_readl(&ch_ctrl->
					   hw_flow) & ~(C_RS_CTS | C_RS_RTS));
		}
		/* As the HW flow control is done in firmware, the driver
		   doesn't need to care about it */
		info->flags &= ~ASYNC_CTS_FLOW;

		/* XON/XOFF/XANY flow control flags */
		sw_flow = 0;
		if (iflag & IXON) {
			sw_flow |= C_FL_OXX;
			if (iflag & IXANY)
				sw_flow |= C_FL_OIXANY;
		}
		cy_writel(&ch_ctrl->sw_flow, sw_flow);

		retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
		if (retval != 0) {
			printk("cyc:set_line_char retval on ttyC%d was %x\n",
				info->line, retval);
		}

		/* CD sensitivity */
		if (cflag & CLOCAL) {
			info->flags &= ~ASYNC_CHECK_CD;
		} else {
			info->flags |= ASYNC_CHECK_CD;
		}

		if (baud == 0) {	/* baud rate is zero, turn off line */
			cy_writel(&ch_ctrl->rs_control,
				  cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
#ifdef CY_DEBUG_DTR
			printk("cyc:set_line_char dropping Z DTR\n");
#endif
		} else {
			cy_writel(&ch_ctrl->rs_control,
				  cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
#ifdef CY_DEBUG_DTR
			printk("cyc:set_line_char raising Z DTR\n");
#endif
		}

		retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
		if (retval != 0) {
			printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
				info->line, retval);
		}

		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
	}
}				/* set_line_char */

static int
get_serial_info(struct cyclades_port *info,
		struct serial_struct __user * retinfo)
{
	struct serial_struct tmp;
	struct cyclades_card *cinfo = &cy_card[info->card];

	if (!retinfo)
		return -EFAULT;
	memset(&tmp, 0, sizeof(tmp));
	tmp.type = info->type;
	tmp.line = info->line;
	tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
	tmp.irq = cinfo->irq;
	tmp.flags = info->flags;
	tmp.close_delay = info->close_delay;
	tmp.closing_wait = info->closing_wait;
	tmp.baud_base = info->baud;
	tmp.custom_divisor = info->custom_divisor;
	tmp.hub6 = 0;		/*!!! */
	return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
}				/* get_serial_info */

static int
set_serial_info(struct cyclades_port *info,
		struct serial_struct __user * new_info)
{
	struct serial_struct new_serial;
	struct cyclades_port old_info;

	if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
		return -EFAULT;
	old_info = *info;

	if (!capable(CAP_SYS_ADMIN)) {
		if (new_serial.close_delay != info->close_delay ||
				new_serial.baud_base != info->baud ||
				(new_serial.flags & ASYNC_FLAGS &
					~ASYNC_USR_MASK) !=
				(info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
			return -EPERM;
		info->flags = (info->flags & ~ASYNC_USR_MASK) |
				(new_serial.flags & ASYNC_USR_MASK);
		info->baud = new_serial.baud_base;
		info->custom_divisor = new_serial.custom_divisor;
		goto check_and_exit;
	}

	/*
	 * OK, past this point, all the error checking has been done.
	 * At this point, we start making changes.....
	 */

	info->baud = new_serial.baud_base;
	info->custom_divisor = new_serial.custom_divisor;
	info->flags = (info->flags & ~ASYNC_FLAGS) |
			(new_serial.flags & ASYNC_FLAGS);
	info->close_delay = new_serial.close_delay * HZ / 100;
	info->closing_wait = new_serial.closing_wait * HZ / 100;

check_and_exit:
	if (info->flags & ASYNC_INITIALIZED) {
		set_line_char(info);
		return 0;
	} else {
		return startup(info);
	}
}				/* set_serial_info */

/*
 * get_lsr_info - get line status register info
 *
 * Purpose: Let user call ioctl() to get info when the UART physically
 *	    is emptied.  On bus types like RS485, the transmitter must
 *	    release the bus after transmitting. This must be done when
 *	    the transmit shift register is empty, not be done when the
 *	    transmit holding register is empty.  This functionality
 *	    allows an RS485 driver to be written in user space.
 */
static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
{
	int card, chip, channel, index;
	unsigned char status;
	unsigned int result;
	unsigned long flags;
	void __iomem *base_addr;

	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);

		CY_LOCK(info, flags);
		status = cy_readb(base_addr + (CySRER << index)) &
				(CyTxRdy | CyTxMpty);
		CY_UNLOCK(info, flags);
		result = (status ? 0 : TIOCSER_TEMT);
	} else {
		/* Not supported yet */
		return -EINVAL;
	}
	return put_user(result, (unsigned long __user *)value);
}

static int cy_tiocmget(struct tty_struct *tty, struct file *file)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	int card, chip, channel, index;
	void __iomem *base_addr;
	unsigned long flags;
	unsigned char status;
	unsigned long lstatus;
	unsigned int result;
	struct FIRM_ID __iomem *firm_id;
	struct ZFW_CTRL __iomem *zfw_ctrl;
	struct BOARD_CTRL __iomem *board_ctrl;
	struct CH_CTRL __iomem *ch_ctrl;

	if (serial_paranoia_check(info, tty->name, __FUNCTION__))
		return -ENODEV;

	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);

		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
		status = cy_readb(base_addr + (CyMSVR1 << index));
		status |= cy_readb(base_addr + (CyMSVR2 << index));
		CY_UNLOCK(info, flags);

		if (info->rtsdtr_inv) {
			result = ((status & CyRTS) ? TIOCM_DTR : 0) |
				((status & CyDTR) ? TIOCM_RTS : 0);
		} else {
			result = ((status & CyRTS) ? TIOCM_RTS : 0) |
				((status & CyDTR) ? TIOCM_DTR : 0);
		}
		result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
			((status & CyRI) ? TIOCM_RNG : 0) |
			((status & CyDSR) ? TIOCM_DSR : 0) |
			((status & CyCTS) ? TIOCM_CTS : 0);
	} else {
		base_addr = cy_card[card].base_addr;

		if (cy_card[card].num_chips != -1) {
			return -EINVAL;
		}

		firm_id = cy_card[card].base_addr + ID_ADDRESS;
		if (ISZLOADED(cy_card[card])) {
			zfw_ctrl = cy_card[card].base_addr +
				(cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
			board_ctrl = &zfw_ctrl->board_ctrl;
			ch_ctrl = zfw_ctrl->ch_ctrl;
			lstatus = cy_readl(&ch_ctrl[channel].rs_status);
			result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
				((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
				((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
				((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
				((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
				((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
		} else {
			result = 0;
			return -ENODEV;
		}

	}
	return result;
}				/* cy_tiomget */

static int
cy_tiocmset(struct tty_struct *tty, struct file *file,
		unsigned int set, unsigned int clear)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	int card, chip, channel, index;
	void __iomem *base_addr;
	unsigned long flags;
	struct FIRM_ID __iomem *firm_id;
	struct ZFW_CTRL __iomem *zfw_ctrl;
	struct BOARD_CTRL __iomem *board_ctrl;
	struct CH_CTRL __iomem *ch_ctrl;
	int retval;

	if (serial_paranoia_check(info, tty->name, __FUNCTION__))
		return -ENODEV;

	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);

		if (set & TIOCM_RTS) {
			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  CyDTR);
			} else {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  CyRTS);
			}
			CY_UNLOCK(info, flags);
		}
		if (clear & TIOCM_RTS) {
			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  ~CyDTR);
			} else {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  ~CyRTS);
			}
			CY_UNLOCK(info, flags);
		}
		if (set & TIOCM_DTR) {
			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  CyRTS);
			} else {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  CyDTR);
			}
#ifdef CY_DEBUG_DTR
			printk("cyc:set_modem_info raising DTR\n");
			printk("     status: 0x%x, 0x%x\n",
				cy_readb(base_addr + (CyMSVR1 << index)),
				cy_readb(base_addr + (CyMSVR2 << index)));
#endif
			CY_UNLOCK(info, flags);
		}
		if (clear & TIOCM_DTR) {
			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  ~CyRTS);
			} else {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  ~CyDTR);
			}

#ifdef CY_DEBUG_DTR
			printk("cyc:set_modem_info dropping DTR\n");
			printk("     status: 0x%x, 0x%x\n",
				cy_readb(base_addr + (CyMSVR1 << index)),
				cy_readb(base_addr + (CyMSVR2 << index)));
#endif
			CY_UNLOCK(info, flags);
		}
	} else {
		base_addr = cy_card[card].base_addr;

		firm_id = cy_card[card].base_addr + ID_ADDRESS;
		if (ISZLOADED(cy_card[card])) {
			zfw_ctrl = cy_card[card].base_addr +
				(cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
			board_ctrl = &zfw_ctrl->board_ctrl;
			ch_ctrl = zfw_ctrl->ch_ctrl;

			if (set & TIOCM_RTS) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
					  cy_readl(&ch_ctrl[channel].
						   rs_control) | C_RS_RTS);
				CY_UNLOCK(info, flags);
			}
			if (clear & TIOCM_RTS) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
					  cy_readl(&ch_ctrl[channel].
						   rs_control) & ~C_RS_RTS);
				CY_UNLOCK(info, flags);
			}
			if (set & TIOCM_DTR) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
					  cy_readl(&ch_ctrl[channel].
						   rs_control) | C_RS_DTR);
#ifdef CY_DEBUG_DTR
				printk("cyc:set_modem_info raising Z DTR\n");
#endif
				CY_UNLOCK(info, flags);
			}
			if (clear & TIOCM_DTR) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
					  cy_readl(&ch_ctrl[channel].
						   rs_control) & ~C_RS_DTR);
#ifdef CY_DEBUG_DTR
				printk("cyc:set_modem_info clearing Z DTR\n");
#endif
				CY_UNLOCK(info, flags);
			}
		} else {
			return -ENODEV;
		}
		CY_LOCK(info, flags);
		retval = cyz_issue_cmd(&cy_card[info->card],
					channel, C_CM_IOCTLM, 0L);
		if (retval != 0) {
			printk("cyc:set_modem_info retval on ttyC%d was %x\n",
				info->line, retval);
		}
		CY_UNLOCK(info, flags);
	}
	return 0;
}				/* cy_tiocmset */

/*
 * cy_break() --- routine which turns the break handling on or off
 */
static void cy_break(struct tty_struct *tty, int break_state)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	unsigned long flags;

	if (serial_paranoia_check(info, tty->name, "cy_break"))
		return;

	CY_LOCK(info, flags);
	if (!IS_CYC_Z(cy_card[info->card])) {
		/* Let the transmit ISR take care of this (since it
		   requires stuffing characters into the output stream).
		 */
		if (break_state == -1) {
			if (!info->breakon) {
				info->breakon = 1;
				if (!info->xmit_cnt) {
					CY_UNLOCK(info, flags);
					start_xmit(info);
					CY_LOCK(info, flags);
				}
			}
		} else {
			if (!info->breakoff) {
				info->breakoff = 1;
				if (!info->xmit_cnt) {
					CY_UNLOCK(info, flags);
					start_xmit(info);
					CY_LOCK(info, flags);
				}
			}
		}
	} else {
		int retval;

		if (break_state == -1) {
			retval = cyz_issue_cmd(&cy_card[info->card],
				info->line - cy_card[info->card].first_line,
				C_CM_SET_BREAK, 0L);
			if (retval != 0) {
				printk("cyc:cy_break (set) retval on ttyC%d "
					"was %x\n", info->line, retval);
			}
		} else {
			retval = cyz_issue_cmd(&cy_card[info->card],
				info->line - cy_card[info->card].first_line,
				C_CM_CLR_BREAK, 0L);
			if (retval != 0) {
				printk("cyc:cy_break (clr) retval on ttyC%d "
					"was %x\n", info->line, retval);
			}
		}
	}
	CY_UNLOCK(info, flags);
}				/* cy_break */

static int
get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
{

	if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
		return -EFAULT;
	info->mon.int_count = 0;
	info->mon.char_count = 0;
	info->mon.char_max = 0;
	info->mon.char_last = 0;
	return 0;
}				/* get_mon_info */

static int set_threshold(struct cyclades_port *info, unsigned long value)
{
	void __iomem *base_addr;
	int card, channel, chip, index;
	unsigned long flags;

	card = info->card;
	channel = info->line - cy_card[card].first_line;
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);

		info->cor3 &= ~CyREC_FIFO;
		info->cor3 |= value & CyREC_FIFO;

		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
		cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
		CY_UNLOCK(info, flags);
	} else {
		/* Nothing to do! */
	}
	return 0;
}				/* set_threshold */

static int
get_threshold(struct cyclades_port *info, unsigned long __user * value)
{
	void __iomem *base_addr;
	int card, channel, chip, index;
	unsigned long tmp;

	card = info->card;
	channel = info->line - cy_card[card].first_line;
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);

		tmp = cy_readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
		return put_user(tmp, value);
	} else {
		/* Nothing to do! */
		return 0;
	}
}				/* get_threshold */

static int
set_default_threshold(struct cyclades_port *info, unsigned long value)
{
	info->default_threshold = value & 0x0f;
	return 0;
}				/* set_default_threshold */

static int
get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
{
	return put_user(info->default_threshold, value);
}				/* get_default_threshold */

static int set_timeout(struct cyclades_port *info, unsigned long value)
{
	void __iomem *base_addr;
	int card, channel, chip, index;
	unsigned long flags;

	card = info->card;
	channel = info->line - cy_card[card].first_line;
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);

		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
		CY_UNLOCK(info, flags);
	} else {
		/* Nothing to do! */
	}
	return 0;
}				/* set_timeout */

static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
{
	void __iomem *base_addr;
	int card, channel, chip, index;
	unsigned long tmp;

	card = info->card;
	channel = info->line - cy_card[card].first_line;
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);

		tmp = cy_readb(base_addr + (CyRTPR << index));
		return put_user(tmp, value);
	} else {
		/* Nothing to do! */
		return 0;
	}
}				/* get_timeout */

static int set_default_timeout(struct cyclades_port *info, unsigned long value)
{
	info->default_timeout = value & 0xff;
	return 0;
}				/* set_default_timeout */

static int
get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
{
	return put_user(info->default_timeout, value);
}				/* get_default_timeout */

/*
 * This routine allows the tty driver to implement device-
 * specific ioctl's.  If the ioctl number passed in cmd is
 * not recognized by the driver, it should return ENOIOCTLCMD.
 */
static int
cy_ioctl(struct tty_struct *tty, struct file *file,
	 unsigned int cmd, unsigned long arg)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	struct cyclades_icount cprev, cnow;	/* kernel counter temps */
	struct serial_icounter_struct __user *p_cuser;	/* user space */
	int ret_val = 0;
	unsigned long flags;
	void __user *argp = (void __user *)arg;

	if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
		return -ENODEV;

#ifdef CY_DEBUG_OTHER
	printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg);	/* */
#endif

	switch (cmd) {
	case CYGETMON:
		ret_val = get_mon_info(info, argp);
		break;
	case CYGETTHRESH:
		ret_val = get_threshold(info, argp);
		break;
	case CYSETTHRESH:
		ret_val = set_threshold(info, arg);
		break;
	case CYGETDEFTHRESH:
		ret_val = get_default_threshold(info, argp);
		break;
	case CYSETDEFTHRESH:
		ret_val = set_default_threshold(info, arg);
		break;
	case CYGETTIMEOUT:
		ret_val = get_timeout(info, argp);
		break;
	case CYSETTIMEOUT:
		ret_val = set_timeout(info, arg);
		break;
	case CYGETDEFTIMEOUT:
		ret_val = get_default_timeout(info, argp);
		break;
	case CYSETDEFTIMEOUT:
		ret_val = set_default_timeout(info, arg);
		break;
	case CYSETRFLOW:
		info->rflow = (int)arg;
		ret_val = 0;
		break;
	case CYGETRFLOW:
		ret_val = info->rflow;
		break;
	case CYSETRTSDTR_INV:
		info->rtsdtr_inv = (int)arg;
		ret_val = 0;
		break;
	case CYGETRTSDTR_INV:
		ret_val = info->rtsdtr_inv;
		break;
	case CYGETCARDINFO:
		if (copy_to_user(argp, &cy_card[info->card],
				 sizeof(struct cyclades_card))) {
			ret_val = -EFAULT;
			break;
		}
		ret_val = 0;
		break;
	case CYGETCD1400VER:
		ret_val = info->chip_rev;
		break;
#ifndef CONFIG_CYZ_INTR
	case CYZSETPOLLCYCLE:
		cyz_polling_cycle = (arg * HZ) / 1000;
		ret_val = 0;
		break;
	case CYZGETPOLLCYCLE:
		ret_val = (cyz_polling_cycle * 1000) / HZ;
		break;
#endif				/* CONFIG_CYZ_INTR */
	case CYSETWAIT:
		info->closing_wait = (unsigned short)arg *HZ / 100;
		ret_val = 0;
		break;
	case CYGETWAIT:
		ret_val = info->closing_wait / (HZ / 100);
		break;
	case TIOCGSERIAL:
		ret_val = get_serial_info(info, argp);
		break;
	case TIOCSSERIAL:
		ret_val = set_serial_info(info, argp);
		break;
	case TIOCSERGETLSR:	/* Get line status register */
		ret_val = get_lsr_info(info, argp);
		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:
		CY_LOCK(info, flags);
		/* note the counters on entry */
		cprev = info->icount;
		CY_UNLOCK(info, flags);
		while (1) {
			interruptible_sleep_on(&info->delta_msr_wait);
			/* see if a signal did it */
			if (signal_pending(current)) {
				return -ERESTARTSYS;
			}

			CY_LOCK(info, flags);
			cnow = info->icount;	/* atomic copy */
			CY_UNLOCK(info, flags);

			if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
			    cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
				return -EIO;	/* no change => error */
			}
			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))) {
				return 0;
			}
			cprev = cnow;
		}
		/* NOTREACHED */

		/*
		 * 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.
		 */
	case TIOCGICOUNT:
		CY_LOCK(info, flags);
		cnow = info->icount;
		CY_UNLOCK(info, flags);
		p_cuser = argp;
		ret_val = put_user(cnow.cts, &p_cuser->cts);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.dsr, &p_cuser->dsr);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.rng, &p_cuser->rng);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.dcd, &p_cuser->dcd);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.rx, &p_cuser->rx);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.tx, &p_cuser->tx);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.frame, &p_cuser->frame);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.overrun, &p_cuser->overrun);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.parity, &p_cuser->parity);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.brk, &p_cuser->brk);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
		if (ret_val)
			return ret_val;
		ret_val = 0;
		break;
	default:
		ret_val = -ENOIOCTLCMD;
	}

#ifdef CY_DEBUG_OTHER
	printk(" cyc:cy_ioctl done\n");
#endif

	return ret_val;
}				/* cy_ioctl */

/*
 * This routine allows the tty driver to be notified when
 * device's termios settings have changed.  Note that a
 * well-designed tty driver should be prepared to accept the case
 * where old == NULL, and try to do something rational.
 */
static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;

#ifdef CY_DEBUG_OTHER
	printk("cyc:cy_set_termios ttyC%d\n", info->line);
#endif

	if (tty->termios->c_cflag == old_termios->c_cflag &&
			(tty->termios->c_iflag & (IXON | IXANY)) ==
			(old_termios->c_iflag & (IXON | IXANY)))
		return;
	set_line_char(info);

	if ((old_termios->c_cflag & CRTSCTS) &&
			!(tty->termios->c_cflag & CRTSCTS)) {
		tty->hw_stopped = 0;
		cy_start(tty);
	}
#if 0
	/*
	 * No need to wake up processes in open wait, since they
	 * sample the CLOCAL flag once, and don't recheck it.
	 * XXX  It's not clear whether the current behavior is correct
	 * or not.  Hence, this may change.....
	 */
	if (!(old_termios->c_cflag & CLOCAL) &&
	    (tty->termios->c_cflag & CLOCAL))
		wake_up_interruptible(&info->open_wait);
#endif
}				/* cy_set_termios */

/* This function is used to send a high-priority XON/XOFF character to
   the device.
*/
static void cy_send_xchar(struct tty_struct *tty, char ch)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	int card, channel;

	if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
		return;

	info->x_char = ch;

	if (ch)
		cy_start(tty);

	card = info->card;
	channel = info->line - cy_card[card].first_line;

	if (IS_CYC_Z(cy_card[card])) {
		if (ch == STOP_CHAR(tty))
			cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
					0L);
		else if (ch == START_CHAR(tty))
			cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
					0L);
	}
}

/* This routine is called by the upper-layer tty layer to signal
   that incoming characters should be throttled because the input
   buffers are close to full.
 */
static void cy_throttle(struct tty_struct *tty)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;

#ifdef CY_DEBUG_THROTTLE
	char buf[64];

	printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
			tty->ldisc.chars_in_buffer(tty), info->line);
#endif

	if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
		return;
	}

	card = info->card;

	if (I_IXOFF(tty)) {
		if (!IS_CYC_Z(cy_card[card]))
			cy_send_xchar(tty, STOP_CHAR(tty));
		else
			info->throttle = 1;
	}

	if (tty->termios->c_cflag & CRTSCTS) {
		channel = info->line - cy_card[card].first_line;
		if (!IS_CYC_Z(cy_card[card])) {
			chip = channel >> 2;
			channel &= 0x03;
			index = cy_card[card].bus_index;
			base_addr = cy_card[card].base_addr +
				(cy_chip_offset[chip] << index);

			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  ~CyDTR);
			} else {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  ~CyRTS);
			}
			CY_UNLOCK(info, flags);
		} else {
			info->throttle = 1;
		}
	}
}				/* cy_throttle */

/*
 * This routine notifies the tty driver that it should signal
 * that characters can now be sent to the tty without fear of
 * overrunning the input buffers of the line disciplines.
 */
static void cy_unthrottle(struct tty_struct *tty)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;

#ifdef CY_DEBUG_THROTTLE
	char buf[64];

	printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
		tty->ldisc.chars_in_buffer(tty), info->line);
#endif

	if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
		return;
	}

	if (I_IXOFF(tty)) {
		if (info->x_char)
			info->x_char = 0;
		else
			cy_send_xchar(tty, START_CHAR(tty));
	}

	if (tty->termios->c_cflag & CRTSCTS) {
		card = info->card;
		channel = info->line - cy_card[card].first_line;
		if (!IS_CYC_Z(cy_card[card])) {
			chip = channel >> 2;
			channel &= 0x03;
			index = cy_card[card].bus_index;
			base_addr = cy_card[card].base_addr +
				(cy_chip_offset[chip] << index);

			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  CyDTR);
			} else {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  CyRTS);
			}
			CY_UNLOCK(info, flags);
		} else {
			info->throttle = 0;
		}
	}
}				/* cy_unthrottle */

/* cy_start and cy_stop provide software output flow control as a
   function of XON/XOFF, software CTS, and other such stuff.
*/
static void cy_stop(struct tty_struct *tty)
{
	struct cyclades_card *cinfo;
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	void __iomem *base_addr;
	int chip, channel, index;
	unsigned long flags;

#ifdef CY_DEBUG_OTHER
	printk("cyc:cy_stop ttyC%d\n", info->line);	/* */
#endif

	if (serial_paranoia_check(info, tty->name, "cy_stop"))
		return;

	cinfo = &cy_card[info->card];
	channel = info->line - cinfo->first_line;
	if (!IS_CYC_Z(*cinfo)) {
		index = cinfo->bus_index;
		chip = channel >> 2;
		channel &= 0x03;
		base_addr = cy_card[info->card].base_addr +
			(cy_chip_offset[chip] << index);

		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index),
			(u_char)(channel & 0x0003)); /* index channel */
		cy_writeb(base_addr + (CySRER << index),
			  cy_readb(base_addr + (CySRER << index)) & ~CyTxRdy);
		CY_UNLOCK(info, flags);
	} else {
		/* Nothing to do! */
	}
}				/* cy_stop */

static void cy_start(struct tty_struct *tty)
{
	struct cyclades_card *cinfo;
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	void __iomem *base_addr;
	int chip, channel, index;
	unsigned long flags;

#ifdef CY_DEBUG_OTHER
	printk("cyc:cy_start ttyC%d\n", info->line);	/* */
#endif

	if (serial_paranoia_check(info, tty->name, "cy_start"))
		return;

	cinfo = &cy_card[info->card];
	channel = info->line - cinfo->first_line;
	index = cinfo->bus_index;
	if (!IS_CYC_Z(*cinfo)) {
		chip = channel >> 2;
		channel &= 0x03;
		base_addr = cy_card[info->card].base_addr +
			(cy_chip_offset[chip] << index);

		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003));	/* index channel */
		cy_writeb(base_addr + (CySRER << index),
			  cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
		CY_UNLOCK(info, flags);
	} else {
		/* Nothing to do! */
	}
}				/* cy_start */

static void cy_flush_buffer(struct tty_struct *tty)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
	int card, channel, retval;
	unsigned long flags;

#ifdef CY_DEBUG_IO
	printk("cyc:cy_flush_buffer ttyC%d\n", info->line);	/* */
#endif

	if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
		return;

	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);

	CY_LOCK(info, flags);
	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
	CY_UNLOCK(info, flags);

	if (IS_CYC_Z(cy_card[card])) {	/* If it is a Z card, flush the on-board
					   buffers as well */
		CY_LOCK(info, flags);
		retval =
		    cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
		if (retval != 0) {
			printk("cyc: flush_buffer retval on ttyC%d was %x\n",
				info->line, retval);
		}
		CY_UNLOCK(info, flags);
	}
	tty_wakeup(tty);
}				/* cy_flush_buffer */

/*
 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
 */
static void cy_hangup(struct tty_struct *tty)
{
	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;

#ifdef CY_DEBUG_OTHER
	printk("cyc:cy_hangup ttyC%d\n", info->line);	/* */
#endif

	if (serial_paranoia_check(info, tty->name, "cy_hangup"))
		return;

	cy_flush_buffer(tty);
	shutdown(info);
	info->event = 0;
	info->count = 0;
#ifdef CY_DEBUG_COUNT
	printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
#endif
	info->tty = NULL;
	info->flags &= ~ASYNC_NORMAL_ACTIVE;
	wake_up_interruptible(&info->open_wait);
}				/* cy_hangup */

/*
 * ---------------------------------------------------------------------
 * cy_init() and friends
 *
 * cy_init() is called at boot-time to initialize the serial driver.
 * ---------------------------------------------------------------------
 */

/* initialize chips on Cyclom-Y card -- return number of valid
   chips (which is number of ports/4) */
static unsigned short __init
cyy_init_card(void __iomem * true_base_addr, int index)
{
	unsigned int chip_number;
	void __iomem *base_addr;

	cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
	/* Cy_HwReset is 0x1400 */
	cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
	/* Cy_ClrIntr is 0x1800 */
	udelay(500L);

	for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
		base_addr =
		    true_base_addr + (cy_chip_offset[chip_number] << index);
		mdelay(1);
		if (cy_readb(base_addr + (CyCCR << index)) != 0x00) {
			/*************
			printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
			chip_number, (unsigned long)base_addr);
			*************/
			return chip_number;
		}

		cy_writeb(base_addr + (CyGFRCR << index), 0);
		udelay(10L);

		/* The Cyclom-16Y does not decode address bit 9 and therefore
		   cannot distinguish between references to chip 0 and a non-
		   existent chip 4.  If the preceding clearing of the supposed
		   chip 4 GFRCR register appears at chip 0, there is no chip 4
		   and this must be a Cyclom-16Y, not a Cyclom-32Ye.
		 */
		if (chip_number == 4 && cy_readb(true_base_addr +
				(cy_chip_offset[0] << index) +
				(CyGFRCR << index)) == 0) {
			return chip_number;
		}

		cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
		mdelay(1);

		if (cy_readb(base_addr + (CyGFRCR << index)) == 0x00) {
			/*
			   printk(" chip #%d at %#6lx is not responding ",
			   chip_number, (unsigned long)base_addr);
			   printk("(GFRCR stayed 0)\n",
			 */
			return chip_number;
		}
		if ((0xf0 & (cy_readb(base_addr + (CyGFRCR << index)))) !=
				0x40) {
			/*
			printk(" chip #%d at %#6lx is not valid (GFRCR == "
					"%#2x)\n",
					chip_number, (unsigned long)base_addr,
					base_addr[CyGFRCR<<index]);
			 */
			return chip_number;
		}
		cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
		if (cy_readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
			/* It is a CD1400 rev. J or later */
			/* Impossible to reach 5ms with this chip.
			   Changed to 2ms instead (f = 500 Hz). */
			cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
		} else {
			/* f = 200 Hz */
			cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
		}

		/*
		   printk(" chip #%d at %#6lx is rev 0x%2x\n",
		   chip_number, (unsigned long)base_addr,
		   cy_readb(base_addr+(CyGFRCR<<index)));
		 */
	}
	return chip_number;
}				/* cyy_init_card */

/*
 * ---------------------------------------------------------------------
 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
 * sets global variables and return the number of ISA boards found.
 * ---------------------------------------------------------------------
 */
static int __init cy_detect_isa(void)
{
#ifdef CONFIG_ISA
	unsigned short cy_isa_irq, nboard;
	void __iomem *cy_isa_address;
	unsigned short i, j, cy_isa_nchan;
#ifdef MODULE
	int isparam = 0;
#endif

	nboard = 0;

#ifdef MODULE
	/* Check for module parameters */
	for (i = 0; i < NR_CARDS; i++) {
		if (maddr[i] || i) {
			isparam = 1;
			cy_isa_addresses[i] = maddr[i];
		}
		if (!maddr[i])
			break;
	}
#endif

	/* scan the address table probing for Cyclom-Y/ISA boards */
	for (i = 0; i < NR_ISA_ADDRS; i++) {
		unsigned int isa_address = cy_isa_addresses[i];
		if (isa_address == 0x0000) {
			return nboard;
		}

		/* probe for CD1400... */
		cy_isa_address = ioremap(isa_address, CyISA_Ywin);
		cy_isa_nchan = CyPORTS_PER_CHIP *
			cyy_init_card(cy_isa_address, 0);
		if (cy_isa_nchan == 0) {
			continue;
		}
#ifdef MODULE
		if (isparam && irq[i])
			cy_isa_irq = irq[i];
		else
#endif
			/* find out the board's irq by probing */
			cy_isa_irq = detect_isa_irq(cy_isa_address);
		if (cy_isa_irq == 0) {
			printk("Cyclom-Y/ISA found at 0x%lx ",
				(unsigned long)cy_isa_address);
			printk("but the IRQ could not be detected.\n");
			continue;
		}

		if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
			printk("Cyclom-Y/ISA found at 0x%lx ",
				(unsigned long)cy_isa_address);
			printk("but no more channels are available.\n");
			printk("Change NR_PORTS in cyclades.c and recompile "
					"kernel.\n");
			return nboard;
		}
		/* fill the next cy_card structure available */
		for (j = 0; j < NR_CARDS; j++) {
			if (cy_card[j].base_addr == 0)
				break;
		}
		if (j == NR_CARDS) {	/* no more cy_cards available */
			printk("Cyclom-Y/ISA found at 0x%lx ",
				(unsigned long)cy_isa_address);
			printk("but no more cards can be used .\n");
			printk("Change NR_CARDS in cyclades.c and recompile "
					"kernel.\n");
			return nboard;
		}

		/* allocate IRQ */
		if (request_irq(cy_isa_irq, cyy_interrupt,
				IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
			printk("Cyclom-Y/ISA found at 0x%lx ",
				(unsigned long)cy_isa_address);
			printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
			return nboard;
		}

		/* set cy_card */
		cy_card[j].base_addr = cy_isa_address;
		cy_card[j].ctl_addr = NULL;
		cy_card[j].irq = (int)cy_isa_irq;
		cy_card[j].bus_index = 0;
		cy_card[j].first_line = cy_next_channel;
		cy_card[j].num_chips = cy_isa_nchan / 4;
		nboard++;

		/* print message */
		printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
			j + 1, (unsigned long)cy_isa_address,
			(unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
			cy_isa_irq);
		printk("%d channels starting from port %d.\n",
			cy_isa_nchan, cy_next_channel);
		cy_next_channel += cy_isa_nchan;
	}
	return nboard;
#else
	return 0;
#endif				/* CONFIG_ISA */
}				/* cy_detect_isa */

static void plx_init(void __iomem * addr, __u32 initctl)
{
	/* Reset PLX */
	cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
	udelay(100L);
	cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);

	/* Reload Config. Registers from EEPROM */
	cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
	udelay(100L);
	cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
}

/*
 * ---------------------------------------------------------------------
 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
 * sets global variables and return the number of PCI boards found.
 * ---------------------------------------------------------------------
 */
static int __init cy_detect_pci(void)
{
#ifdef CONFIG_PCI

	struct pci_dev *pdev = NULL;
	unsigned char cyy_rev_id;
	unsigned char cy_pci_irq = 0;
	__u32 cy_pci_phys0, cy_pci_phys2;
	void __iomem *cy_pci_addr0, *cy_pci_addr2;
	unsigned short i, j, cy_pci_nchan, plx_ver;
	unsigned short device_id, dev_index = 0;
	__u32 mailbox;
	__u32 ZeIndex = 0;
	void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
	__u32 Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
	unsigned char Ze_irq[NR_CARDS];
	struct pci_dev *Ze_pdev[NR_CARDS];

	for (i = 0; i < NR_CARDS; i++) {
		/* look for a Cyclades card by vendor and device id */
		while ((device_id = cy_pci_dev_id[dev_index].device) != 0) {
			if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
						   device_id, pdev)) == NULL) {
				dev_index++;	/* try next device id */
			} else {
				break;	/* found a board */
			}
		}

		if (device_id == 0)
			break;

		if (pci_enable_device(pdev))
			continue;

		/* read PCI configuration area */
		cy_pci_irq = pdev->irq;
		cy_pci_phys0 = pci_resource_start(pdev, 0);
		cy_pci_phys2 = pci_resource_start(pdev, 2);
		pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);

		device_id &= ~PCI_DEVICE_ID_MASK;

		if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
				device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
#ifdef CY_PCI_DEBUG
			printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
				pdev->bus->number, pdev->devfn);
			printk("rev_id=%d) IRQ%d\n",
				cyy_rev_id, (int)cy_pci_irq);
			printk("Cyclom-Y/PCI:found  winaddr=0x%lx "
				"ctladdr=0x%lx\n",
				(ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
#endif

			if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
				printk("  Warning: PCI I/O bit incorrectly "
					"set. Ignoring it...\n");
				pdev->resource[2].flags &= ~IORESOURCE_IO;
			}

			/* Although we don't use this I/O region, we should
			   request it from the kernel anyway, to avoid problems
			   with other drivers accessing it. */
			if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
				printk(KERN_ERR "cyclades: failed to reserve "
						"PCI resources\n");
				continue;
			}
#if defined(__alpha__)
			if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {	/* below 1M? */
				printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
					pdev->bus->number, pdev->devfn);
				printk("rev_id=%d) IRQ%d\n",
					cyy_rev_id, (int)cy_pci_irq);
				printk("Cyclom-Y/PCI:found  winaddr=0x%lx "
					"ctladdr=0x%lx\n",
					(ulong)cy_pci_phys2,
					(ulong)cy_pci_phys0);
				printk("Cyclom-Y/PCI not supported for low "
					"addresses in Alpha systems.\n");
				i--;
				continue;
			}
#endif
			cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
			cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);

#ifdef CY_PCI_DEBUG
			printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
				"ctladdr=0x%lx\n",
				(u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
#endif
			cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
					cyy_init_card(cy_pci_addr2, 1));
			if (cy_pci_nchan == 0) {
				printk("Cyclom-Y PCI host card with ");
				printk("no Serial-Modules at 0x%lx.\n",
					(ulong) cy_pci_phys2);
				i--;
				continue;
			}
			if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
				printk("Cyclom-Y/PCI found at 0x%lx ",
					(ulong) cy_pci_phys2);
				printk("but no channels are available.\n");
				printk("Change NR_PORTS in cyclades.c and "
						"recompile kernel.\n");
				return i;
			}
			/* fill the next cy_card structure available */
			for (j = 0; j < NR_CARDS; j++) {
				if (cy_card[j].base_addr == 0)
					break;
			}
			if (j == NR_CARDS) {	/* no more cy_cards available */
				printk("Cyclom-Y/PCI found at 0x%lx ",
					(ulong) cy_pci_phys2);
				printk("but no more cards can be used.\n");
				printk("Change NR_CARDS in cyclades.c and "
						"recompile kernel.\n");
				return i;
			}

			/* allocate IRQ */
			if (request_irq(cy_pci_irq, cyy_interrupt,
					IRQF_SHARED, "Cyclom-Y", &cy_card[j])) {
				printk("Cyclom-Y/PCI found at 0x%lx ",
					(ulong) cy_pci_phys2);
				printk("but could not allocate IRQ%d.\n",
					cy_pci_irq);
				return i;
			}

			/* set cy_card */
			cy_card[j].base_phys = (ulong) cy_pci_phys2;
			cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
			cy_card[j].base_addr = cy_pci_addr2;
			cy_card[j].ctl_addr = cy_pci_addr0;
			cy_card[j].irq = (int)cy_pci_irq;
			cy_card[j].bus_index = 1;
			cy_card[j].first_line = cy_next_channel;
			cy_card[j].num_chips = cy_pci_nchan / 4;
			cy_card[j].pdev = pdev;

			/* enable interrupts in the PCI interface */
			plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
			switch (plx_ver) {
			case PLX_9050:

				cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
				break;

			case PLX_9060:
			case PLX_9080:
			default:	/* Old boards, use PLX_9060 */

				plx_init(cy_pci_addr0, 0x6c);
			/* For some yet unknown reason, once the PLX9060 reloads
			   the EEPROM, the IRQ is lost and, thus, we have to
			   re-write it to the PCI config. registers.
			   This will remain here until we find a permanent
			   fix. */
				pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
						cy_pci_irq);

				cy_writew(cy_pci_addr0 + 0x68,
					  cy_readw(cy_pci_addr0 +
						   0x68) | 0x0900);
				break;
			}

			/* print message */
			printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
				j + 1, (ulong)cy_pci_phys2,
				(ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
				(int)cy_pci_irq);
			printk("%d channels starting from port %d.\n",
				cy_pci_nchan, cy_next_channel);

			cy_next_channel += cy_pci_nchan;
		} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
			/* print message */
			printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
				pdev->bus->number, pdev->devfn);
			printk("rev_id=%d) IRQ%d\n",
				cyy_rev_id, (int)cy_pci_irq);
			printk("Cyclades-Z/PCI: found winaddr=0x%lx "
				"ctladdr=0x%lx\n",
				(ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
			printk("Cyclades-Z/PCI not supported for low "
				"addresses\n");
			break;
		} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
#ifdef CY_PCI_DEBUG
			printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
				pdev->bus->number, pdev->devfn);
			printk("rev_id=%d) IRQ%d\n",
				cyy_rev_id, (int)cy_pci_irq);
			printk("Cyclades-Z/PCI: found winaddr=0x%lx "
				"ctladdr=0x%lx\n",
				(ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
#endif
			cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);

			/* Disable interrupts on the PLX before resetting it */
			cy_writew(cy_pci_addr0 + 0x68,
				cy_readw(cy_pci_addr0 + 0x68) & ~0x0900);

			plx_init(cy_pci_addr0, 0x6c);
			/* For some yet unknown reason, once the PLX9060 reloads
			   the EEPROM, the IRQ is lost and, thus, we have to
			   re-write it to the PCI config. registers.
			   This will remain here until we find a permanent
			   fix. */
			pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
						cy_pci_irq);

			mailbox =
			    (__u32)cy_readl(&((struct RUNTIME_9060 __iomem *)
						cy_pci_addr0)->mail_box_0);

			if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
				printk("  Warning: PCI I/O bit incorrectly "
					"set. Ignoring it...\n");
				pdev->resource[2].flags &= ~IORESOURCE_IO;
			}

			/* Although we don't use this I/O region, we should
			   request it from the kernel anyway, to avoid problems
			   with other drivers accessing it. */
			if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
				printk(KERN_ERR "cyclades: failed to reserve "
					"PCI resources\n");
				continue;
			}

			if (mailbox == ZE_V1) {
				cy_pci_addr2 = ioremap(cy_pci_phys2,
						CyPCI_Ze_win);
				if (ZeIndex == NR_CARDS) {
					printk("Cyclades-Ze/PCI found at "
						"0x%lx but no more cards can "
						"be used.\nChange NR_CARDS in "
						"cyclades.c and recompile "
						"kernel.\n",
						(ulong)cy_pci_phys2);
				} else {
					Ze_phys0[ZeIndex] = cy_pci_phys0;
					Ze_phys2[ZeIndex] = cy_pci_phys2;
					Ze_addr0[ZeIndex] = cy_pci_addr0;
					Ze_addr2[ZeIndex] = cy_pci_addr2;
					Ze_irq[ZeIndex] = cy_pci_irq;
					Ze_pdev[ZeIndex] = pdev;
					ZeIndex++;
				}
				i--;
				continue;
			} else {
				cy_pci_addr2 = ioremap(cy_pci_phys2,CyPCI_Zwin);
			}

#ifdef CY_PCI_DEBUG
			printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
				"ctladdr=0x%lx\n",
				(ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
			if (mailbox == ZO_V1) {
				cy_writel(&((struct RUNTIME_9060 *)
					(cy_pci_addr0))->loc_addr_base,
					WIN_CREG);
				PAUSE;
				printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
					"%lx\n", (ulong) (0xff &
					cy_readl(&((struct CUSTOM_REG *)
						(cy_pci_addr2))->fpga_id)),
					(ulong)(0xff &
					cy_readl(&((struct CUSTOM_REG *)
						(cy_pci_addr2))->
							fpga_version)));
				cy_writel(&((struct RUNTIME_9060 *)
					(cy_pci_addr0))->loc_addr_base,
					WIN_RAM);
			} else {
				printk("Cyclades-Z/PCI: New Cyclades-Z board.  "
						"FPGA not loaded\n");
			}
#endif
			/* The following clears the firmware id word.  This
			   ensures that the driver will not attempt to talk to
			   the board until it has been properly initialized.
			 */
			PAUSE;
			if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
				cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);

			/* This must be a Cyclades-8Zo/PCI.  The extendable
			   version will have a different device_id and will
			   be allocated its maximum number of ports. */
			cy_pci_nchan = 8;

			if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
				printk("Cyclades-8Zo/PCI found at 0x%lx but"
					"no channels are available.\nChange "
					"NR_PORTS in cyclades.c and recompile "
					"kernel.\n", (ulong)cy_pci_phys2);
				return i;
			}

			/* fill the next cy_card structure available */
			for (j = 0; j < NR_CARDS; j++) {
				if (cy_card[j].base_addr == 0)
					break;
			}
			if (j == NR_CARDS) {	/* no more cy_cards available */
				printk("Cyclades-8Zo/PCI found at 0x%lx but"
					"no more cards can be used.\nChange "
					"NR_CARDS in cyclades.c and recompile "
					"kernel.\n", (ulong)cy_pci_phys2);
				return i;
			}
#ifdef CONFIG_CYZ_INTR
			/* allocate IRQ only if board has an IRQ */
			if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
				if (request_irq(cy_pci_irq, cyz_interrupt,
						IRQF_SHARED, "Cyclades-Z",
						&cy_card[j])) {
					printk("Cyclom-8Zo/PCI found at 0x%lx "
						"but could not allocate "
						"IRQ%d.\n", (ulong)cy_pci_phys2,
						cy_pci_irq);
					return i;
				}
			}
#endif				/* CONFIG_CYZ_INTR */

			/* set cy_card */
			cy_card[j].base_phys = cy_pci_phys2;
			cy_card[j].ctl_phys = cy_pci_phys0;
			cy_card[j].base_addr = cy_pci_addr2;
			cy_card[j].ctl_addr = cy_pci_addr0;
			cy_card[j].irq = (int)cy_pci_irq;
			cy_card[j].bus_index = 1;
			cy_card[j].first_line = cy_next_channel;
			cy_card[j].num_chips = -1;
			cy_card[j].pdev = pdev;

			/* print message */
#ifdef CONFIG_CYZ_INTR
			/* don't report IRQ if board is no IRQ */
			if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
				printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
					"IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
					(ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
					(int)cy_pci_irq);
			else
#endif				/* CONFIG_CYZ_INTR */
				printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
					j + 1, (ulong)cy_pci_phys2,
					(ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));

			printk("%d channels starting from port %d.\n",
					cy_pci_nchan, cy_next_channel);
			cy_next_channel += cy_pci_nchan;
		}
	}

	for (; ZeIndex != 0 && i < NR_CARDS; i++) {
		cy_pci_phys0 = Ze_phys0[0];
		cy_pci_phys2 = Ze_phys2[0];
		cy_pci_addr0 = Ze_addr0[0];
		cy_pci_addr2 = Ze_addr2[0];
		cy_pci_irq = Ze_irq[0];
		pdev = Ze_pdev[0];
		for (j = 0; j < ZeIndex - 1; j++) {
			Ze_phys0[j] = Ze_phys0[j + 1];
			Ze_phys2[j] = Ze_phys2[j + 1];
			Ze_addr0[j] = Ze_addr0[j + 1];
			Ze_addr2[j] = Ze_addr2[j + 1];
			Ze_irq[j] = Ze_irq[j + 1];
			Ze_pdev[j] = Ze_pdev[j + 1];
		}
		ZeIndex--;
		mailbox = (__u32)cy_readl(&((struct RUNTIME_9060 __iomem *)
						cy_pci_addr0)->mail_box_0);
#ifdef CY_PCI_DEBUG
		printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
			(ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
		printk("Cyclades-Z/PCI: New Cyclades-Z board.  FPGA not "
				"loaded\n");
#endif
		PAUSE;
		/* This must be the new Cyclades-Ze/PCI. */
		cy_pci_nchan = ZE_V1_NPORTS;

		if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
			printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
				"are available.\nChange NR_PORTS in cyclades.c "
				"and recompile kernel.\n",
				(ulong) cy_pci_phys2);
			return i;
		}

		/* fill the next cy_card structure available */
		for (j = 0; j < NR_CARDS; j++) {
			if (cy_card[j].base_addr == 0)
				break;
		}
		if (j == NR_CARDS) {	/* no more cy_cards available */
			printk("Cyclades-Ze/PCI found at 0x%lx but no more "
				"cards can be used.\nChange NR_CARDS in "
				"cyclades.c and recompile kernel.\n",
				(ulong) cy_pci_phys2);
			return i;
		}
#ifdef CONFIG_CYZ_INTR
		/* allocate IRQ only if board has an IRQ */
		if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
			if (request_irq(cy_pci_irq, cyz_interrupt,
					IRQF_SHARED, "Cyclades-Z",
					&cy_card[j])) {
				printk("Cyclom-Ze/PCI found at 0x%lx ",
					(ulong) cy_pci_phys2);
				printk("but could not allocate IRQ%d.\n",
					cy_pci_irq);
				return i;
			}
		}
#endif				/* CONFIG_CYZ_INTR */

		/* set cy_card */
		cy_card[j].base_phys = cy_pci_phys2;
		cy_card[j].ctl_phys = cy_pci_phys0;
		cy_card[j].base_addr = cy_pci_addr2;
		cy_card[j].ctl_addr = cy_pci_addr0;
		cy_card[j].irq = (int)cy_pci_irq;
		cy_card[j].bus_index = 1;
		cy_card[j].first_line = cy_next_channel;
		cy_card[j].num_chips = -1;
		cy_card[j].pdev = pdev;

		/* print message */
#ifdef CONFIG_CYZ_INTR
		/* don't report IRQ if board is no IRQ */
		if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
			printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
				j + 1, (ulong) cy_pci_phys2,
				(ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
				(int)cy_pci_irq);
		else
#endif				/* CONFIG_CYZ_INTR */
			printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
				j + 1, (ulong) cy_pci_phys2,
				(ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));

		printk("%d channels starting from port %d.\n",
			cy_pci_nchan, cy_next_channel);
		cy_next_channel += cy_pci_nchan;
	}
	if (ZeIndex != 0) {
		printk("Cyclades-Ze/PCI found at 0x%x but no more cards can be "
			"used.\nChange NR_CARDS in cyclades.c and recompile "
			"kernel.\n", (unsigned int)Ze_phys2[0]);
	}
	return i;
#else
	return 0;
#endif				/* ifdef CONFIG_PCI */
}				/* cy_detect_pci */

/*
 * This routine prints out the appropriate serial driver version number
 * and identifies which options were configured into this driver.
 */
static inline void show_version(void)
{
	printk("Cyclades driver " CY_VERSION "\n");
	printk("        built %s %s\n", __DATE__, __TIME__);
}				/* show_version */

static int
cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
		int *eof, void *data)
{
	struct cyclades_port *info;
	int i;
	int len = 0;
	off_t begin = 0;
	off_t pos = 0;
	int size;
	__u32 cur_jifs = jiffies;

	size = sprintf(buf, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
			"IdleIn  Overruns  Ldisc\n");

	pos += size;
	len += size;

	/* Output one line for each known port */
	for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
		info = &cy_port[i];

		if (info->count)
			size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
				"%8lu %9lu %6ld\n", info->line,
				(cur_jifs - info->idle_stats.in_use) / HZ,
				info->idle_stats.xmit_bytes,
				(cur_jifs - info->idle_stats.xmit_idle) / HZ,
				info->idle_stats.recv_bytes,
				(cur_jifs - info->idle_stats.recv_idle) / HZ,
				info->idle_stats.overruns,
				(long)info->tty->ldisc.num);
		else
			size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
				"%8lu %9lu %6ld\n",
				info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
		len += size;
		pos = begin + len;

		if (pos < offset) {
			len = 0;
			begin = pos;
		}
		if (pos > offset + length)
			goto done;
	}
	*eof = 1;
done:
	*start = buf + (offset - begin);	/* Start of wanted data */
	len -= (offset - begin);	/* Start slop */
	if (len > length)
		len = length;	/* Ending slop */
	if (len < 0)
		len = 0;
	return len;
}

/* The serial driver boot-time initialization code!
    Hardware I/O ports are mapped to character special devices on a
    first found, first allocated manner.  That is, this code searches
    for Cyclom cards in the system.  As each is found, it is probed
    to discover how many chips (and thus how many ports) are present.
    These ports are mapped to the tty ports 32 and upward in monotonic
    fashion.  If an 8-port card is replaced with a 16-port card, the
    port mapping on a following card will shift.

    This approach is different from what is used in the other serial
    device driver because the Cyclom is more properly a multiplexer,
    not just an aggregation of serial ports on one card.

    If there are more cards with more ports than have been
    statically allocated above, a warning is printed and the
    extra ports are ignored.
 */

static const struct tty_operations cy_ops = {
	.open = cy_open,
	.close = cy_close,
	.write = cy_write,
	.put_char = cy_put_char,
	.flush_chars = cy_flush_chars,
	.write_room = cy_write_room,
	.chars_in_buffer = cy_chars_in_buffer,
	.flush_buffer = cy_flush_buffer,
	.ioctl = cy_ioctl,
	.throttle = cy_throttle,
	.unthrottle = cy_unthrottle,
	.set_termios = cy_set_termios,
	.stop = cy_stop,
	.start = cy_start,
	.hangup = cy_hangup,
	.break_ctl = cy_break,
	.wait_until_sent = cy_wait_until_sent,
	.read_proc = cyclades_get_proc_info,
	.tiocmget = cy_tiocmget,
	.tiocmset = cy_tiocmset,
};

static int __init cy_init(void)
{
	struct cyclades_port *info;
	struct cyclades_card *cinfo;
	int number_z_boards = 0;
	int board, port, i, index;
	unsigned long mailbox;
	unsigned short chip_number;
	int nports;

	cy_serial_driver = alloc_tty_driver(NR_PORTS);
	if (!cy_serial_driver)
		return -ENOMEM;
	show_version();

	/* Initialize the tty_driver structure */

	cy_serial_driver->owner = THIS_MODULE;
	cy_serial_driver->driver_name = "cyclades";
	cy_serial_driver->name = "ttyC";
	cy_serial_driver->major = CYCLADES_MAJOR;
	cy_serial_driver->minor_start = 0;
	cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
	cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
	cy_serial_driver->init_termios = tty_std_termios;
	cy_serial_driver->init_termios.c_cflag =
	    B9600 | CS8 | CREAD | HUPCL | CLOCAL;
	cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
	tty_set_operations(cy_serial_driver, &cy_ops);

	if (tty_register_driver(cy_serial_driver))
		panic("Couldn't register Cyclades serial driver\n");

	for (i = 0; i < NR_CARDS; i++) {
		/* base_addr=0 indicates board not found */
		cy_card[i].base_addr = NULL;
	}

	/* the code below is responsible to find the boards. Each different
	   type of board has its own detection routine. If a board is found,
	   the next cy_card structure available is set by the detection
	   routine. These functions are responsible for checking the
	   availability of cy_card and cy_port data structures and updating
	   the cy_next_channel. */

	/* look for isa boards */
	cy_isa_nboard = cy_detect_isa();

	/* look for pci boards */
	cy_pci_nboard = cy_detect_pci();

	cy_nboard = cy_isa_nboard + cy_pci_nboard;

	/* invalidate remaining cy_card structures */
	for (i = 0; i < NR_CARDS; i++) {
		if (cy_card[i].base_addr == 0) {
			cy_card[i].first_line = -1;
			cy_card[i].ctl_addr = NULL;
			cy_card[i].irq = 0;
			cy_card[i].bus_index = 0;
			cy_card[i].first_line = 0;
			cy_card[i].num_chips = 0;
		}
	}
	/* invalidate remaining cy_port structures */
	for (i = cy_next_channel; i < NR_PORTS; i++) {
		cy_port[i].line = -1;
		cy_port[i].magic = -1;
	}

	/* initialize per-port data structures for each valid board found */
	for (board = 0; board < cy_nboard; board++) {
		cinfo = &cy_card[board];
		if (cinfo->num_chips == -1) {	/* Cyclades-Z */
			number_z_boards++;
			mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
					     cy_card[board].ctl_addr)->
					   mail_box_0);
			nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
			cinfo->intr_enabled = 0;
			cinfo->nports = 0;	/* Will be correctly set later, after 
						   Z FW is loaded */
			spin_lock_init(&cinfo->card_lock);
			for (port = cinfo->first_line;
			     port < cinfo->first_line + nports; port++) {
				info = &cy_port[port];
				info->magic = CYCLADES_MAGIC;
				info->type = PORT_STARTECH;
				info->card = board;
				info->line = port;
				info->chip_rev = 0;
				info->flags = STD_COM_FLAGS;
				info->tty = NULL;
				if (mailbox == ZO_V1)
					info->xmit_fifo_size = CYZ_FIFO_SIZE;
				else
					info->xmit_fifo_size =
					    4 * CYZ_FIFO_SIZE;
				info->cor1 = 0;
				info->cor2 = 0;
				info->cor3 = 0;
				info->cor4 = 0;
				info->cor5 = 0;
				info->tbpr = 0;
				info->tco = 0;
				info->rbpr = 0;
				info->rco = 0;
				info->custom_divisor = 0;
				info->close_delay = 5 * HZ / 10;
				info->closing_wait = CLOSING_WAIT_DELAY;
				info->icount.cts = info->icount.dsr =
				    info->icount.rng = info->icount.dcd = 0;
				info->icount.rx = info->icount.tx = 0;
				info->icount.frame = info->icount.parity = 0;
				info->icount.overrun = info->icount.brk = 0;
				info->x_char = 0;
				info->event = 0;
				info->count = 0;
				info->blocked_open = 0;
				info->default_threshold = 0;
				info->default_timeout = 0;
				INIT_WORK(&info->tqueue, do_softint);
				init_waitqueue_head(&info->open_wait);
				init_waitqueue_head(&info->close_wait);
				init_waitqueue_head(&info->shutdown_wait);
				init_waitqueue_head(&info->delta_msr_wait);
				/* info->session */
				/* info->pgrp */
				info->read_status_mask = 0;
				/* info->timeout */
				/* Bentson's vars */
				info->jiffies[0] = 0;
				info->jiffies[1] = 0;
				info->jiffies[2] = 0;
				info->rflush_count = 0;
#ifdef CONFIG_CYZ_INTR
				init_timer(&cyz_rx_full_timer[port]);
				cyz_rx_full_timer[port].function = NULL;
#endif
			}
			continue;
		} else {	/* Cyclom-Y of some kind */
			index = cinfo->bus_index;
			spin_lock_init(&cinfo->card_lock);
			cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
			for (port = cinfo->first_line;
			     port < cinfo->first_line + cinfo->nports; port++) {
				info = &cy_port[port];
				info->magic = CYCLADES_MAGIC;
				info->type = PORT_CIRRUS;
				info->card = board;
				info->line = port;
				info->flags = STD_COM_FLAGS;
				info->tty = NULL;
				info->xmit_fifo_size = CyMAX_CHAR_FIFO;
				info->cor1 =
				    CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
				info->cor2 = CyETC;
				info->cor3 = 0x08;	/* _very_ small rcv threshold */
				info->cor4 = 0;
				info->cor5 = 0;
				info->custom_divisor = 0;
				info->close_delay = 5 * HZ / 10;
				info->closing_wait = CLOSING_WAIT_DELAY;
				info->icount.cts = info->icount.dsr =
				    info->icount.rng = info->icount.dcd = 0;
				info->icount.rx = info->icount.tx = 0;
				info->icount.frame = info->icount.parity = 0;
				info->icount.overrun = info->icount.brk = 0;
				chip_number = (port - cinfo->first_line) / 4;
				if ((info->chip_rev =
				     cy_readb(cinfo->base_addr +
					      (cy_chip_offset[chip_number] <<
					       index) + (CyGFRCR << index))) >=
				    CD1400_REV_J) {
					/* It is a CD1400 rev. J or later */
					info->tbpr = baud_bpr_60[13];	/* Tx BPR */
					info->tco = baud_co_60[13];	/* Tx CO */
					info->rbpr = baud_bpr_60[13];	/* Rx BPR */
					info->rco = baud_co_60[13];	/* Rx CO */
					info->rflow = 0;
					info->rtsdtr_inv = 1;
				} else {
					info->tbpr = baud_bpr_25[13];	/* Tx BPR */
					info->tco = baud_co_25[13];	/* Tx CO */
					info->rbpr = baud_bpr_25[13];	/* Rx BPR */
					info->rco = baud_co_25[13];	/* Rx CO */
					info->rflow = 0;
					info->rtsdtr_inv = 0;
				}
				info->x_char = 0;
				info->event = 0;
				info->count = 0;
				info->blocked_open = 0;
				info->default_threshold = 0;
				info->default_timeout = 0;
				INIT_WORK(&info->tqueue, do_softint);
				init_waitqueue_head(&info->open_wait);
				init_waitqueue_head(&info->close_wait);
				init_waitqueue_head(&info->shutdown_wait);
				init_waitqueue_head(&info->delta_msr_wait);
				/* info->session */
				/* info->pgrp */
				info->read_status_mask =
				    CyTIMEOUT | CySPECHAR | CyBREAK
				    | CyPARITY | CyFRAME | CyOVERRUN;
				/* info->timeout */
			}
		}
	}

#ifndef CONFIG_CYZ_INTR
	if (number_z_boards && !cyz_timeron) {
		cyz_timeron++;
		cyz_timerlist.expires = jiffies + 1;
		add_timer(&cyz_timerlist);
#ifdef CY_PCI_DEBUG
		printk("Cyclades-Z polling initialized\n");
#endif
	}
#endif				/* CONFIG_CYZ_INTR */

	return 0;

}				/* cy_init */

static void __exit cy_cleanup_module(void)
{
	int i, e1;

#ifndef CONFIG_CYZ_INTR
	if (cyz_timeron){
		cyz_timeron = 0;
		del_timer(&cyz_timerlist);
	}
#endif /* CONFIG_CYZ_INTR */

	if ((e1 = tty_unregister_driver(cy_serial_driver)))
		printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
			e1);

	put_tty_driver(cy_serial_driver);

	for (i = 0; i < NR_CARDS; i++) {
		if (cy_card[i].base_addr) {
			iounmap(cy_card[i].base_addr);
			if (cy_card[i].ctl_addr)
				iounmap(cy_card[i].ctl_addr);
			if (cy_card[i].irq
#ifndef CONFIG_CYZ_INTR
				&& cy_card[i].num_chips != -1 /* not a Z card */
#endif /* CONFIG_CYZ_INTR */
				)
				free_irq(cy_card[i].irq, &cy_card[i]);
#ifdef CONFIG_PCI
			if (cy_card[i].pdev)
				pci_release_regions(cy_card[i].pdev);
#endif
		}
	}
} /* cy_cleanup_module */

module_init(cy_init);
module_exit(cy_cleanup_module);

MODULE_LICENSE("GPL");