summaryrefslogtreecommitdiffstats
path: root/sys/dev/cx/if_cx.c
blob: 4aa98290f80864b30b6468cb9d3deadf6b538e66 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
/*-
 * Cronyx-Sigma adapter driver for FreeBSD.
 * Supports PPP/HDLC and Cisco/HDLC protocol in synchronous mode,
 * and asyncronous channels with full modem control.
 * Keepalive protocol implemented in both Cisco and PPP modes.
 *
 * Copyright (C) 1994-2002 Cronyx Engineering.
 * Author: Serge Vakulenko, <vak@cronyx.ru>
 *
 * Copyright (C) 1999-2004 Cronyx Engineering.
 * Rewritten on DDK, ported to NETGRAPH, rewritten for FreeBSD 3.x-5.x by
 * Kurakin Roman, <rik@cronyx.ru>
 *
 * This software is distributed with NO WARRANTIES, not even the implied
 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Authors grant any other persons or organisations a permission to use,
 * modify and redistribute this software in source and binary forms,
 * as long as this message is kept with the software, all derivative
 * works or modified versions.
 *
 * Cronyx Id: if_cx.c,v 1.1.2.34 2004/06/23 17:09:13 rik Exp $
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>

#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/mbuf.h>
#include <sys/sockio.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/conf.h>
#include <sys/errno.h>
#include <sys/serial.h>
#include <sys/tty.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <isa/isavar.h>
#include <sys/fcntl.h>
#include <sys/interrupt.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <net/if.h>
#include <machine/cpufunc.h>
#include <machine/cserial.h>
#include <machine/resource.h>
#include <dev/cx/machdep.h>
#include <dev/cx/cxddk.h>
#include <dev/cx/cronyxfw.h>
#include "opt_ng_cronyx.h"
#ifdef NETGRAPH_CRONYX
#   include "opt_netgraph.h"
#   include <netgraph/ng_message.h>
#   include <netgraph/netgraph.h>
#   include <dev/cx/ng_cx.h>
#else
#   include <net/if_types.h>
#   include <net/if_sppp.h>
#   define PP_CISCO IFF_LINK2
#   include <net/bpf.h>
#endif

#define NCX	1

/* If we don't have Cronyx's sppp version, we don't have fr support via sppp */
#ifndef PP_FR
#define PP_FR 0
#endif

#define CX_DEBUG(d,s)	({if (d->chan->debug) {\
				printf ("%s: ", d->name); printf s;}})
#define CX_DEBUG2(d,s)	({if (d->chan->debug>1) {\
				printf ("%s: ", d->name); printf s;}})

#define CX_LOCK_NAME	"cxX"

static	int	cx_mpsafenet = 1;
TUNABLE_INT("debug.cx.mpsafenet", &cx_mpsafenet);
SYSCTL_NODE(_debug, OID_AUTO, cx, CTLFLAG_RD, 0, "Cronyx Sigma Adapters");
SYSCTL_INT(_debug_cx, OID_AUTO, mpsafenet, CTLFLAG_RD, &cx_mpsafenet, 0,
	"Enable/disable MPSAFE network support for Cronyx Sigma Adapters");

#define CX_LOCK(_bd)		do { \
				    if (cx_mpsafenet) \
					mtx_lock (&(_bd)->cx_mtx); \
				} while (0)
#define CX_UNLOCK(_bd)		do { \
				    if (cx_mpsafenet) \
					mtx_unlock (&(_bd)->cx_mtx); \
				} while (0)
#define CX_LOCK_ASSERT(_bd)	do { \
				    if (cx_mpsafenet) \
					mtx_assert (&(_bd)->cx_mtx, MA_OWNED); \
				} while (0)

typedef struct _async_q {
	int beg;
	int end;
	#define BF_SZ 14400
	int buf[BF_SZ+1];
} async_q;

#define AQ_GSZ(q)	((BF_SZ + (q)->end - (q)->beg)%BF_SZ)
#define AQ_PUSH(q,c)	{*((q)->buf + (q)->end) = c;\
			(q)->end = ((q)->end + 1)%BF_SZ;}
#define AQ_POP(q,c)	{c = *((q)->buf + (q)->beg);\
			(q)->beg = ((q)->beg + 1)%BF_SZ;}

static void cx_identify		__P((driver_t *, device_t));
static int cx_probe		__P((device_t));
static int cx_attach		__P((device_t));
static int cx_detach		__P((device_t));
static t_open_t			cx_topen;
static t_modem_t		cx_tmodem;
static t_close_t		cx_tclose;

static device_method_t cx_isa_methods [] = {
	DEVMETHOD(device_identify,	cx_identify),
	DEVMETHOD(device_probe,		cx_probe),
	DEVMETHOD(device_attach,	cx_attach),
	DEVMETHOD(device_detach,	cx_detach),
	{0, 0}
};

typedef struct _cx_dma_mem_t {
	unsigned long	phys;
	void		*virt;
	size_t		size;
	bus_dma_tag_t	dmat;
	bus_dmamap_t	mapp;
} cx_dma_mem_t;

typedef struct _drv_t {
	char name [8];
	cx_chan_t *chan;
	cx_board_t *board;
	cx_dma_mem_t dmamem;
	struct tty *tty;
	struct callout dcd_timeout_handle;
	unsigned callout;
	unsigned lock;
	int open_dev;
	int cd;
	int running;
#ifdef NETGRAPH
	char	nodename [NG_NODELEN+1];
	hook_p	hook;
	hook_p	debug_hook;
	node_p	node;
	struct	ifqueue lo_queue;
	struct	ifqueue hi_queue;
	short	timeout;
	struct	callout timeout_handle;
#else
	struct	ifqueue queue;
	struct	ifnet *ifp;
#endif
	struct	cdev *devt;
	async_q	aqueue;
#define CX_READ 1
#define CX_WRITE 2
	int intr_action;
	short atimeout;
} drv_t;

typedef struct _bdrv_t {
	cx_board_t	*board;
	struct resource	*base_res;
	struct resource	*drq_res;
	struct resource	*irq_res;
	int		base_rid;
	int		drq_rid;
	int		irq_rid;
	void		*intrhand;
	drv_t		channel [NCHAN];
	struct mtx	cx_mtx;
} bdrv_t;

static driver_t cx_isa_driver = {
	"cx",
	cx_isa_methods,
	sizeof (bdrv_t),
};

static devclass_t cx_devclass;

extern long csigma_fw_len;
extern const char *csigma_fw_version;
extern const char *csigma_fw_date;
extern const char *csigma_fw_copyright;
extern const cr_dat_tst_t csigma_fw_tvec[];
extern const u_char csigma_fw_data[];
static void cx_oproc (struct tty *tp);
static int cx_param (struct tty *tp, struct termios *t);
static void cx_stop (struct tty *tp, int flag);
static void cx_receive (cx_chan_t *c, char *data, int len);
static void cx_transmit (cx_chan_t *c, void *attachment, int len);
static void cx_error (cx_chan_t *c, int data);
static void cx_modem (cx_chan_t *c);
static void cx_up (drv_t *d);
static void cx_start (drv_t *d);
static void cx_softintr (void *);
static void *cx_fast_ih;
static void cx_down (drv_t *d);
static void cx_watchdog (drv_t *d);
static void cx_carrier (void *arg);

#ifdef NETGRAPH
extern struct ng_type typestruct;
#else
static void cx_ifstart (struct ifnet *ifp);
static void cx_tlf (struct sppp *sp);
static void cx_tls (struct sppp *sp);
static void cx_ifwatchdog (struct ifnet *ifp);
static int cx_sioctl (struct ifnet *ifp, u_long cmd, caddr_t data);
static void cx_initialize (void *softc);
#endif

static cx_board_t *adapter [NCX];
static drv_t *channel [NCX*NCHAN];
static struct callout led_timo [NCX];
static struct callout timeout_handle;

static int cx_open (struct cdev *dev, int flag, int mode, struct thread *td);
static int cx_close (struct cdev *dev, int flag, int mode, struct thread *td);
static int cx_ioctl (struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td);
static struct cdevsw cx_cdevsw = {
	.d_version  = D_VERSION,
	.d_open     = cx_open,
	.d_close    = cx_close,
	.d_ioctl    = cx_ioctl,
	.d_name     = "cx",
	.d_flags    = D_TTY | D_NEEDGIANT,
};

static int MY_SOFT_INTR;

/*
 * Print the mbuf chain, for debug purposes only.
 */
static void printmbuf (struct mbuf *m)
{
	printf ("mbuf:");
	for (; m; m=m->m_next) {
		if (m->m_flags & M_PKTHDR)
			printf (" HDR %d:", m->m_pkthdr.len);
		if (m->m_flags & M_EXT)
			printf (" EXT:");
		printf (" %d", m->m_len);
	}
	printf ("\n");
}

/*
 * Make an mbuf from data.
 */
static struct mbuf *makembuf (void *buf, u_int len)
{
	struct mbuf *m, *o, *p;

	MGETHDR (m, M_DONTWAIT, MT_DATA);

	if (! m)
		return 0;

	if (len >= MINCLSIZE)
		MCLGET (m, M_DONTWAIT);

	m->m_pkthdr.len = len;
	m->m_len = 0;

	p = m;
	while (len) {
		u_int n = M_TRAILINGSPACE (p);
		if (n > len)
			n = len;
		if (! n) {
			/* Allocate new mbuf. */
			o = p;
			MGET (p, M_DONTWAIT, MT_DATA);
			if (! p) {
				m_freem (m);
				return 0;
			}
			if (len >= MINCLSIZE)
				MCLGET (p, M_DONTWAIT);
			p->m_len = 0;
			o->m_next = p;

			n = M_TRAILINGSPACE (p);
			if (n > len)
				n = len;
		}
		bcopy (buf, mtod (p, caddr_t) + p->m_len, n);

		p->m_len += n;
		buf = n + (char*) buf;
		len -= n;
	}
	return m;
}

/*
 * Recover after lost transmit interrupts.
 */
static void cx_timeout (void *arg)
{
	drv_t *d;
	int s, i, k;

	for (i = 0; i < NCX; i++) {
		if (adapter[i] == NULL)
			continue;
		for (k = 0; k < NCHAN; ++k) {
			d = channel[i * NCHAN + k];
			if (! d)
				continue;
			s = splhigh ();
			CX_LOCK ((bdrv_t *)d->board->sys);
			if (d->atimeout == 1 && d->tty && d->tty->t_state & TS_BUSY) {
				d->tty->t_state &= ~TS_BUSY;
				if (d->tty->t_dev) {
					d->intr_action |= CX_WRITE;
					MY_SOFT_INTR = 1;
					swi_sched (cx_fast_ih, 0);
				}
				CX_DEBUG (d, ("cx_timeout\n"));
			}
			if (d->atimeout)
				d->atimeout--;
			CX_UNLOCK ((bdrv_t *)d->board->sys);
			splx (s);
		}
	}
	callout_reset (&timeout_handle, hz*5, cx_timeout, 0);
}

static void cx_led_off (void *arg)
{
	cx_board_t *b = arg;
	bdrv_t *bd = b->sys;
	int s;

	s = splhigh ();
	CX_LOCK (bd);
	cx_led (b, 0);
	CX_UNLOCK (bd);
	splx (s);
}

/*
 * Activate interupt handler from DDK.
 */
static void cx_intr (void *arg)
{
	bdrv_t *bd = arg;
	cx_board_t *b = bd->board;
#ifndef NETGRAPH
	int i;
#endif
	int s = splhigh ();

	CX_LOCK (bd);
	/* Turn LED on. */
	cx_led (b, 1);

	cx_int_handler (b);

	/* Turn LED off 50 msec later. */
	callout_reset (&led_timo[b->num], hz/20, cx_led_off, b);
	CX_UNLOCK (bd);
	splx (s);

#ifndef NETGRAPH
	/* Pass packets in a lock-free state */
	for (i = 0; i < NCHAN && b->chan[i].type; i++) {
		drv_t *d = b->chan[i].sys;
		struct mbuf *m;
		if (!d || !d->running)
			continue;
		while (_IF_QLEN(&d->queue)) {
			IF_DEQUEUE (&d->queue,m);
			if (!m)
				continue;
			sppp_input (d->ifp, m);	
		}
	}
#endif
}

static int probe_irq (cx_board_t *b, int irq)
{
	int mask, busy, cnt;

	/* Clear pending irq, if any. */
	cx_probe_irq (b, -irq);
	DELAY (100);
	for (cnt=0; cnt<5; ++cnt) {
		/* Get the mask of pending irqs, assuming they are busy.
		 * Activate the adapter on given irq. */
		busy = cx_probe_irq (b, irq);
		DELAY (100);

		/* Get the mask of active irqs.
		 * Deactivate our irq. */
		mask = cx_probe_irq (b, -irq);
		DELAY (100);
		if ((mask & ~busy) == 1 << irq) {
			cx_probe_irq (b, 0);
			/* printf ("cx%d: irq %d ok, mask=0x%04x, busy=0x%04x\n",
				b->num, irq, mask, busy); */
			return 1;
		}
	}
	/* printf ("cx%d: irq %d not functional, mask=0x%04x, busy=0x%04x\n",
		b->num, irq, mask, busy); */
	cx_probe_irq (b, 0);
	return 0;
}

static short porttab [] = {
	0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0,
	0x300, 0x320, 0x340, 0x360, 0x380, 0x3a0, 0x3c0, 0x3e0, 0
};
static char dmatab [] = { 7, 6, 5, 0 };
static char irqtab [] = { 5, 10, 11, 7, 3, 15, 12, 0 };

static int cx_is_free_res (device_t dev, int rid, int type, u_long start,
	u_long end, u_long count)
{
	struct resource *res;
	
	if (!(res = bus_alloc_resource (dev, type, &rid, start, end, count,
	    RF_ALLOCATED)))
		return 0;
		
	bus_release_resource (dev, type, rid, res);
	
	return 1;
}

static void cx_identify (driver_t *driver, device_t dev)
{
	u_long iobase, rescount;
	int devcount;
	device_t *devices;
	device_t child;
	devclass_t my_devclass;
	int i, k;

	if ((my_devclass = devclass_find ("cx")) == NULL)
		return;

	devclass_get_devices (my_devclass, &devices, &devcount);

	if (devcount == 0) {
		/* We should find all devices by our self. We could alter other
		 * devices, but we don't have a choise
		 */
		for (i = 0; (iobase = porttab [i]) != 0; i++) {
			if (!cx_is_free_res (dev, 0, SYS_RES_IOPORT,
			    iobase, iobase + NPORT, NPORT))
				continue;
			if (cx_probe_board (iobase, -1, -1) == 0)
				continue;
			
			devcount++;

			child = BUS_ADD_CHILD (dev, ISA_ORDER_SPECULATIVE, "cx",
			    -1);

			if (child == NULL)
				return;

			device_set_desc_copy (child, "Cronyx Sigma");
			device_set_driver (child, driver);
			bus_set_resource (child, SYS_RES_IOPORT, 0,
			    iobase, NPORT);

			if (devcount >= NCX)
				break;
		}
	} else {
		static short porttab [] = {
			0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0,
			0x300, 0x320, 0x340, 0x360, 0x380, 0x3a0, 0x3c0, 0x3e0, 0
		};
		/* Lets check user choise.
		 */
		for (k = 0; k < devcount; k++) {
			if (bus_get_resource (devices[k], SYS_RES_IOPORT, 0,
			    &iobase, &rescount) != 0)
				continue;

			for (i = 0; porttab [i] != 0; i++) {
				if (porttab [i] != iobase)
					continue;
				if (!cx_is_free_res (devices[k], 0, SYS_RES_IOPORT,
				    iobase, iobase + NPORT, NPORT))
					continue;
				if (cx_probe_board (iobase, -1, -1) == 0)
					continue;
				porttab [i] = -1;
				device_set_desc_copy (devices[k], "Cronyx Sigma");
				break;
			}

			if (porttab [i] == 0) {
				device_delete_child (
				    device_get_parent (devices[k]),
				    devices [k]);
				devices[k] = 0;
				continue;
			}
		}
		for (k = 0; k < devcount; k++) {
			if (devices[k] == 0)
				continue;
			if (bus_get_resource (devices[k], SYS_RES_IOPORT, 0,
			    &iobase, &rescount) == 0)
				continue;
			for (i = 0; (iobase = porttab [i]) != 0; i++) {
				if (porttab [i] == -1) {
					continue;
				}
				if (!cx_is_free_res (devices[k], 0, SYS_RES_IOPORT,
				    iobase, iobase + NPORT, NPORT))
					continue;
				if (cx_probe_board (iobase, -1, -1) == 0)
					continue;
			
				bus_set_resource (devices[k], SYS_RES_IOPORT, 0,
				    iobase, NPORT);
				porttab [i] = -1;
				device_set_desc_copy (devices[k], "Cronyx Sigma");
				break;
			}
			if (porttab [i] == 0) {
				device_delete_child (
				    device_get_parent (devices[k]),
				    devices [k]);
			}
		}		
		free (devices, M_TEMP);
	}
	
	return;
}

static int cx_probe (device_t dev)
{
	int unit = device_get_unit (dev);
	int i;
	u_long iobase, rescount;

	if (!device_get_desc (dev) ||
	    strcmp (device_get_desc (dev), "Cronyx Sigma"))
		return ENXIO;
	
	if (bus_get_resource (dev, SYS_RES_IOPORT, 0, &iobase, &rescount) != 0) {
		printf ("cx%d: Couldn't get IOPORT\n", unit);
		return ENXIO;
	}

	if (!cx_is_free_res (dev, 0, SYS_RES_IOPORT,
	    iobase, iobase + NPORT, NPORT)) {
		printf ("cx%d: Resource IOPORT isn't free %lx\n", unit, iobase);
		return ENXIO;
	}
		
	for (i = 0; porttab [i] != 0; i++) {
		if (porttab [i] == iobase) {
			porttab [i] = -1;
			break;
		}
	}
	
	if (porttab [i] == 0) {
		return ENXIO;
	}
	
	if (!cx_probe_board (iobase, -1, -1)) {
		printf ("cx%d: probing for Sigma at %lx faild\n", unit, iobase);
		return ENXIO;
	}
	
	return 0;
}

static void
cx_bus_dmamap_addr (void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
	unsigned long *addr;

	if (error)
		return;

	KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
	addr = arg;
	*addr = segs->ds_addr;
}

static int
cx_bus_dma_mem_alloc (int bnum, int cnum, cx_dma_mem_t *dmem)
{
	int error;

	error = bus_dma_tag_create (NULL, 16, 0, BUS_SPACE_MAXADDR_24BIT,
		BUS_SPACE_MAXADDR, NULL, NULL, dmem->size, 1,
		dmem->size, 0, NULL, NULL, &dmem->dmat);
	if (error) {
		if (cnum >= 0)	printf ("cx%d-%d: ", bnum, cnum);
		else		printf ("cx%d: ", bnum);
		printf ("couldn't allocate tag for dma memory\n");
 		return 0;
	}
	error = bus_dmamem_alloc (dmem->dmat, (void **)&dmem->virt,
		BUS_DMA_NOWAIT | BUS_DMA_ZERO, &dmem->mapp);
	if (error) {
		if (cnum >= 0)	printf ("cx%d-%d: ", bnum, cnum);
		else		printf ("cx%d: ", bnum);
		printf ("couldn't allocate mem for dma memory\n");
		bus_dma_tag_destroy (dmem->dmat);
 		return 0;
	}
	error = bus_dmamap_load (dmem->dmat, dmem->mapp, dmem->virt,
		dmem->size, cx_bus_dmamap_addr, &dmem->phys, 0);
	if (error) {
		if (cnum >= 0)	printf ("cx%d-%d: ", bnum, cnum);
		else		printf ("cx%d: ", bnum);
		printf ("couldn't load mem map for dma memory\n");
		bus_dmamem_free (dmem->dmat, dmem->virt, dmem->mapp);
		bus_dma_tag_destroy (dmem->dmat);
 		return 0;
	}
	return 1;
}

static void
cx_bus_dma_mem_free (cx_dma_mem_t *dmem)
{
	bus_dmamap_unload (dmem->dmat, dmem->mapp);
	bus_dmamem_free (dmem->dmat, dmem->virt, dmem->mapp);
	bus_dma_tag_destroy (dmem->dmat);
}

/*
 * The adapter is present, initialize the driver structures.
 */
static int cx_attach (device_t dev)
{
	bdrv_t *bd = device_get_softc (dev);
	u_long iobase, drq, irq, rescount;
	int unit = device_get_unit (dev);
	char *cx_ln = CX_LOCK_NAME;
	cx_board_t *b;
	cx_chan_t *c;
	drv_t *d;
	int i;
	int s;

	KASSERT ((bd != NULL), ("cx%d: NULL device softc\n", unit));
	
	bus_get_resource (dev, SYS_RES_IOPORT, 0, &iobase, &rescount);
	bd->base_rid = 0;
	bd->base_res = bus_alloc_resource (dev, SYS_RES_IOPORT, &bd->base_rid,
		iobase, iobase + NPORT, NPORT, RF_ACTIVE);
	if (! bd->base_res) {
		printf ("cx%d: cannot allocate base address\n", unit);
		return ENXIO;
	}
	
	if (bus_get_resource (dev, SYS_RES_DRQ, 0, &drq, &rescount) != 0) {
		for (i = 0; (drq = dmatab [i]) != 0; i++) {
			if (!cx_is_free_res (dev, 0, SYS_RES_DRQ,
			    drq, drq + 1, 1))
				continue;
			bus_set_resource (dev, SYS_RES_DRQ, 0, drq, 1);
			break;
		}
		
		if (dmatab[i] == 0) {	
			bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
				bd->base_res);
			printf ("cx%d: Couldn't get DRQ\n", unit);
			return ENXIO;
		}
	}
	
	bd->drq_rid = 0;
	bd->drq_res = bus_alloc_resource (dev, SYS_RES_DRQ, &bd->drq_rid,
		drq, drq + 1, 1, RF_ACTIVE);
	if (! bd->drq_res) {
		printf ("cx%d: cannot allocate drq\n", unit);
		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
			bd->base_res);
		return ENXIO;
	}	
	
	if (bus_get_resource (dev, SYS_RES_IRQ, 0, &irq, &rescount) != 0) {
		for (i = 0; (irq = irqtab [i]) != 0; i++) {
			if (!cx_is_free_res (dev, 0, SYS_RES_IRQ,
			    irq, irq + 1, 1))
				continue;
			bus_set_resource (dev, SYS_RES_IRQ, 0, irq, 1);
			break;
		}
		
		if (irqtab[i] == 0) {	
			bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
				bd->drq_res);
			bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
				bd->base_res);
			printf ("cx%d: Couldn't get IRQ\n", unit);
			return ENXIO;
		}
	}
	
	bd->irq_rid = 0;
	bd->irq_res = bus_alloc_resource (dev, SYS_RES_IRQ, &bd->irq_rid,
		irq, irq + 1, 1, RF_ACTIVE);
	if (! bd->irq_res) {
		printf ("cx%d: Couldn't allocate irq\n", unit);
		bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
			bd->drq_res);
		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
			bd->base_res);
		return ENXIO;
	}
	
	b = malloc (sizeof (cx_board_t), M_DEVBUF, M_WAITOK);
	if (!b) {
		printf ("cx:%d: Couldn't allocate memory\n", unit);
		return (ENXIO);
	}
	adapter[unit] = b;
	bzero (b, sizeof(cx_board_t));
	
	if (! cx_open_board (b, unit, iobase, irq, drq)) {
		printf ("cx%d: error loading firmware\n", unit);
		free (b, M_DEVBUF);
		bus_release_resource (dev, SYS_RES_IRQ, bd->irq_rid,
			bd->irq_res);
		bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
			bd->drq_res);
		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
			bd->base_res);
 		return ENXIO;
	}

	bd->board = b;
	
	cx_ln[2] = '0' + unit;
	mtx_init (&bd->cx_mtx, cx_ln, MTX_NETWORK_LOCK, MTX_DEF|MTX_RECURSE);
	if (! probe_irq (b, irq)) {
		printf ("cx%d: irq %ld not functional\n", unit, irq);
		bd->board = 0;
		adapter [unit] = 0;
		mtx_destroy (&bd->cx_mtx);
		free (b, M_DEVBUF);
		bus_release_resource (dev, SYS_RES_IRQ, bd->irq_rid,
			bd->irq_res);
		bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
			bd->drq_res);
		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
			bd->base_res);
 		return ENXIO;
	}
	b->sys = bd;
	callout_init (&led_timo[b->num], cx_mpsafenet ? CALLOUT_MPSAFE : 0);
	s = splhigh ();
	if (bus_setup_intr (dev, bd->irq_res,
			   INTR_TYPE_NET|(cx_mpsafenet?INTR_MPSAFE:0),
			   cx_intr, bd, &bd->intrhand)) {
		printf ("cx%d: Can't setup irq %ld\n", unit, irq);
		bd->board = 0;
		b->sys = 0;
		adapter [unit] = 0;
		mtx_destroy (&bd->cx_mtx);
		free (b, M_DEVBUF);
		bus_release_resource (dev, SYS_RES_IRQ, bd->irq_rid,
			bd->irq_res);
		bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
			bd->drq_res);
		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
			bd->base_res);
		splx (s);
 		return ENXIO;		
	}
	
	CX_LOCK (bd);
	cx_init (b, b->num, b->port, irq, drq);
	cx_setup_board (b, 0, 0, 0);
	CX_UNLOCK (bd);

	printf ("cx%d: <Cronyx-Sigma-%s>\n", b->num, b->name);

	for (c=b->chan; c<b->chan+NCHAN; ++c) {
		if (c->type == T_NONE)
			continue;
		d = &bd->channel[c->num];
		d->dmamem.size = sizeof(cx_buf_t);
		if (! cx_bus_dma_mem_alloc (unit, c->num, &d->dmamem))
			continue;
		d->board = b;
		d->chan = c;
		d->open_dev = 0;
		c->sys = d;
		channel [b->num*NCHAN + c->num] = d;
		sprintf (d->name, "cx%d.%d", b->num, c->num);

		switch (c->type) {
		case T_SYNC_RS232:
		case T_SYNC_V35:
		case T_SYNC_RS449:
		case T_UNIV:
		case T_UNIV_RS232:
		case T_UNIV_RS449:
		case T_UNIV_V35:
#ifdef NETGRAPH
		if (ng_make_node_common (&typestruct, &d->node) != 0) {
			printf ("%s: cannot make common node\n", d->name);
			channel [b->num*NCHAN + c->num] = 0;
			c->sys = 0;
			cx_bus_dma_mem_free (&d->dmamem);
			continue;
		}
		NG_NODE_SET_PRIVATE (d->node, d);
		sprintf (d->nodename, "%s%d", NG_CX_NODE_TYPE,
			 c->board->num*NCHAN + c->num);
		if (ng_name_node (d->node, d->nodename)) {
			printf ("%s: cannot name node\n", d->nodename);
			NG_NODE_UNREF (d->node);
			channel [b->num*NCHAN + c->num] = 0;
			c->sys = 0;
			cx_bus_dma_mem_free (&d->dmamem);
			continue;
		}
		d->lo_queue.ifq_maxlen = IFQ_MAXLEN;
		d->hi_queue.ifq_maxlen = IFQ_MAXLEN;
		mtx_init (&d->lo_queue.ifq_mtx, "cx_queue_lo", NULL, MTX_DEF);
		mtx_init (&d->hi_queue.ifq_mtx, "cx_queue_hi", NULL, MTX_DEF);
		callout_init (&d->timeout_handle,
			     cx_mpsafenet ? CALLOUT_MPSAFE : 0);
#else /*NETGRAPH*/
		d->ifp = if_alloc(IFT_PPP);
		if (d->ifp == NULL) {
			printf ("%s: cannot if_alloc() common interface\n",
			    d->name);
			channel [b->num*NCHAN + c->num] = 0;
			c->sys = 0;
			cx_bus_dma_mem_free (&d->dmamem);
			continue;
		}
		d->ifp->if_softc	= d;
		if_initname (d->ifp, "cx", b->num * NCHAN + c->num);
		d->ifp->if_mtu		= PP_MTU;
		d->ifp->if_flags	= IFF_POINTOPOINT | IFF_MULTICAST;
		if (!cx_mpsafenet)
			d->ifp->if_flags |= IFF_NEEDSGIANT;
		d->ifp->if_ioctl	= cx_sioctl;
		d->ifp->if_start	= cx_ifstart;
		d->ifp->if_watchdog	= cx_ifwatchdog;
		d->ifp->if_init		= cx_initialize;
		d->queue.ifq_maxlen	= 2;
		mtx_init (&d->queue.ifq_mtx, "cx_queue", NULL, MTX_DEF);
		sppp_attach (d->ifp);
		if_attach (d->ifp);
		IFP2SP(d->ifp)->pp_tlf	= cx_tlf;
		IFP2SP(d->ifp)->pp_tls	= cx_tls;
		/* If BPF is in the kernel, call the attach for it.
		 * Size of PPP header is 4 bytes. */
		bpfattach (d->ifp, DLT_PPP, 4);
#endif /*NETGRAPH*/
		}
		d->tty = ttyalloc ();
		d->tty->t_open	= cx_topen;
		d->tty->t_close	= cx_tclose;
		d->tty->t_param	= cx_param;
		d->tty->t_stop	= cx_stop;
		d->tty->t_modem	= cx_tmodem;
		d->tty->t_oproc	= cx_oproc;
		d->tty->t_sc	= d;
		CX_LOCK (bd);
		cx_start_chan (c, d->dmamem.virt, d->dmamem.phys);
		cx_register_receive (c, &cx_receive);
		cx_register_transmit (c, &cx_transmit);
		cx_register_error (c, &cx_error);
		cx_register_modem (c, &cx_modem);
		CX_UNLOCK (bd);

		ttycreate(d->tty, TS_CALLOUT, "x%r%r", b->num, c->num);
		d->devt = make_dev (&cx_cdevsw, b->num*NCHAN + c->num + 64, UID_ROOT, GID_WHEEL, 0600, "cx%d", b->num*NCHAN + c->num);
		d->devt->si_drv1 = d;
		callout_init (&d->dcd_timeout_handle,
			     cx_mpsafenet ? CALLOUT_MPSAFE : 0);
	}
	splx (s);

	return 0;
}

static int cx_detach (device_t dev)
{
	bdrv_t *bd = device_get_softc (dev);
	cx_board_t *b = bd->board;
	cx_chan_t *c;
	int s;
	
	KASSERT (mtx_initialized (&bd->cx_mtx), ("cx mutex not initialized"));

	s = splhigh ();
	CX_LOCK (bd);
	/* Check if the device is busy (open). */
	for (c = b->chan; c < b->chan + NCHAN; ++c) {
		drv_t *d = (drv_t*) c->sys;

		if (!d || d->chan->type == T_NONE)
			continue;
		if (d->lock) {
			CX_UNLOCK (bd);
			splx (s);
			return EBUSY;
		}
		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN) &&
		    (d->open_dev|0x2)) {
			CX_UNLOCK (bd);
			splx (s);
			return EBUSY;
		}
		if (d->running) {
			CX_UNLOCK (bd);
			splx (s);
			return EBUSY;
		}
	}

	/* Deactivate the timeout routine. And soft interrupt*/
	callout_stop (&led_timo[b->num]);

	for (c = b->chan; c < b->chan + NCHAN; ++c) {
		drv_t *d = c->sys;

		if (!d || d->chan->type == T_NONE)
			continue;

		callout_stop (&d->dcd_timeout_handle);
	}
	CX_UNLOCK (bd);
	bus_teardown_intr (dev, bd->irq_res, bd->intrhand);
	bus_deactivate_resource (dev, SYS_RES_IRQ, bd->irq_rid, bd->irq_res);
	bus_release_resource (dev, SYS_RES_IRQ, bd->irq_rid, bd->irq_res);
	
	bus_deactivate_resource (dev, SYS_RES_DRQ, bd->drq_rid, bd->drq_res);
	bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid, bd->drq_res);
	
	bus_deactivate_resource (dev, SYS_RES_IOPORT, bd->base_rid, bd->irq_res);
	bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid, bd->base_res);

	CX_LOCK (bd);
	cx_close_board (b);

	/* Detach the interfaces, free buffer memory. */
	for (c = b->chan; c < b->chan + NCHAN; ++c) {
		drv_t *d = (drv_t*) c->sys;

		if (!d || d->chan->type == T_NONE)
			continue;
			
		if (d->tty) {
			ttyfree (d->tty);
			d->tty = NULL;
		}

#ifdef NETGRAPH
		if (d->node) {
			ng_rmnode_self (d->node);
			NG_NODE_UNREF (d->node);
			d->node = NULL;
		}
		mtx_destroy (&d->lo_queue.ifq_mtx);
		mtx_destroy (&d->hi_queue.ifq_mtx);
#else
		/* Detach from the packet filter list of interfaces. */
		bpfdetach (d->ifp);
		/* Detach from the sync PPP list. */
		sppp_detach (d->ifp);

		if_detach (d->ifp);
		if_free(d->ifp);
		/* XXXRIK: check interconnection with irq handler */
		IF_DRAIN (&d->queue);
		mtx_destroy (&d->queue.ifq_mtx);
#endif		
		destroy_dev (d->devt);
	}

	cx_led_off (b);
	CX_UNLOCK (bd);
	callout_drain (&led_timo[b->num]);
	for (c = b->chan; c < b->chan + NCHAN; ++c) {
		drv_t *d = c->sys;

		if (!d || d->chan->type == T_NONE)
			continue;

		callout_drain (&d->dcd_timeout_handle);
	}
	splx (s);
	
	s = splhigh ();
	for (c = b->chan; c < b->chan + NCHAN; ++c) {
		drv_t *d = (drv_t*) c->sys;

		if (!d || d->chan->type == T_NONE)
			continue;
		
		/* Deallocate buffers. */
		cx_bus_dma_mem_free (&d->dmamem);
	}
	bd->board = 0;
	adapter [b->num] = 0;
	free (b, M_DEVBUF);
	splx (s);

	mtx_destroy (&bd->cx_mtx);
	
	return 0;	
}

#ifndef NETGRAPH
static void cx_ifstart (struct ifnet *ifp)
{
	drv_t *d = ifp->if_softc;
	bdrv_t *bd = d->board->sys;

	CX_LOCK (bd);
	cx_start (d);
	CX_UNLOCK (bd);
}

static void cx_ifwatchdog (struct ifnet *ifp)
{
	drv_t *d = ifp->if_softc;

	cx_watchdog (d);
}

static void cx_tlf (struct sppp *sp)
{
	drv_t *d = SP2IFP(sp)->if_softc;

	CX_DEBUG (d, ("cx_tlf\n"));
/*	cx_set_dtr (d->chan, 0);*/
/*	cx_set_rts (d->chan, 0);*/
	if (!(IFP2SP(d->ifp)->pp_flags & PP_FR) && !(d->ifp->if_flags & PP_CISCO))
		sp->pp_down (sp);
}

static void cx_tls (struct sppp *sp)
{
	drv_t *d = SP2IFP(sp)->if_softc;

	CX_DEBUG (d, ("cx_tls\n"));
	if (!(IFP2SP(d->ifp)->pp_flags & PP_FR) && !(d->ifp->if_flags & PP_CISCO))
		sp->pp_up (sp);
}

/*
 * Initialization of interface.
 * It seems to be never called by upper level.
 */
static void cx_initialize (void *softc)
{
	drv_t *d = softc;

	CX_DEBUG (d, ("cx_initialize\n"));
}

/*
 * Process an ioctl request.
 */
static int cx_sioctl (struct ifnet *ifp, u_long cmd, caddr_t data)
{
	drv_t *d = ifp->if_softc;
	bdrv_t *bd = d->board->sys;
	int error, s, was_up, should_be_up;

	/* No socket ioctls while the channel is in async mode. */
	if (d->chan->type == T_NONE || d->chan->mode == M_ASYNC)
		return EBUSY;

	/* Socket ioctls on slave subchannels are not allowed. */
	was_up = (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0;
	error = sppp_ioctl (ifp, cmd, data);
	if (error)
		return error;

	if (! (ifp->if_flags & IFF_DEBUG))
		d->chan->debug = 0;
	else if (! d->chan->debug)
		d->chan->debug = 1;

	switch (cmd) {
	default:	   CX_DEBUG2 (d, ("ioctl 0x%lx\n", cmd)); return 0;
	case SIOCADDMULTI: CX_DEBUG2 (d, ("SIOCADDMULTI\n"));     return 0;
	case SIOCDELMULTI: CX_DEBUG2 (d, ("SIOCDELMULTI\n"));     return 0;
	case SIOCSIFFLAGS: CX_DEBUG2 (d, ("SIOCSIFFLAGS\n"));     break;
	case SIOCSIFADDR:  CX_DEBUG2 (d, ("SIOCSIFADDR\n"));      break;
	}

	/* We get here only in case of SIFFLAGS or SIFADDR. */
	s = splhigh ();
	CX_LOCK (bd);
	should_be_up = (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0;
	if (!was_up && should_be_up) {
		/* Interface goes up -- start it. */
		cx_up (d);
		cx_start (d);
	} else if (was_up && !should_be_up) {
		/* Interface is going down -- stop it. */
		/* if ((IFP2SP(d->ifp)->pp_flags & PP_FR) || (ifp->if_flags & PP_CISCO))*/
		cx_down (d);
	}
	CX_UNLOCK (bd);
	splx (s);
	return 0;
}
#endif /*NETGRAPH*/

/*
 * Stop the interface.  Called on splimp().
 */
static void cx_down (drv_t *d)
{
	int s = splhigh ();
	CX_DEBUG (d, ("cx_down\n"));
	cx_set_dtr (d->chan, 0);
	cx_set_rts (d->chan, 0);
	d->running = 0;
	splx (s);
}

/*
 * Start the interface.  Called on splimp().
 */
static void cx_up (drv_t *d)
{
	int s = splhigh ();
	CX_DEBUG (d, ("cx_up\n"));
	cx_set_dtr (d->chan, 1);
	cx_set_rts (d->chan, 1);
	d->running = 1;
	splx (s);
}

/*
 * Start output on the (slave) interface.  Get another datagram to send
 * off of the interface queue, and copy it to the interface
 * before starting the output.
 */
static void cx_send (drv_t *d)
{
	struct mbuf *m;
	u_short len;

	CX_DEBUG2 (d, ("cx_send\n"));

	/* No output if the interface is down. */
	if (! d->running)
		return;

	/* No output if the modem is off. */
	if (! cx_get_dsr (d->chan) && ! cx_get_loop(d->chan))
		return;

	if (cx_buf_free (d->chan)) {
		/* Get the packet to send. */
#ifdef NETGRAPH
		IF_DEQUEUE (&d->hi_queue, m);
		if (! m)
			IF_DEQUEUE (&d->lo_queue, m);
#else
		m = sppp_dequeue (d->ifp);
#endif
		if (! m)
			return;
#ifndef NETGRAPH
		BPF_MTAP (d->ifp, m);
#endif
		len = m_length (m, NULL);
		if (! m->m_next)
			cx_send_packet (d->chan, (u_char*)mtod (m, caddr_t),
				len, 0);
		else {
			u_char buf [DMABUFSZ];
			m_copydata (m, 0, len, buf);
			cx_send_packet (d->chan, buf, len, 0);
		}
		m_freem (m);

		/* Set up transmit timeout, 10 seconds. */
#ifdef NETGRAPH
		d->timeout = 10;
#else
		d->ifp->if_timer = 10;
#endif
	}
#ifndef NETGRAPH
	d->ifp->if_drv_flags |= IFF_DRV_OACTIVE;
#endif
}

/*
 * Start output on the interface.
 * Always called on splimp().
 */
static void cx_start (drv_t *d)
{
	int s = splhigh ();
	if (d->running) {
		if (! d->chan->dtr)
			cx_set_dtr (d->chan, 1);
		if (! d->chan->rts)
			cx_set_rts (d->chan, 1);
		cx_send (d);
	}
	splx (s);
}

/*
 * Handle transmit timeouts.
 * Recover after lost transmit interrupts.
 * Always called on splimp().
 */
static void cx_watchdog (drv_t *d)
{
	bdrv_t *bd = d->board->sys;
	
	int s = splhigh ();
	CX_LOCK (bd);
	CX_DEBUG (d, ("device timeout\n"));
	if (d->running) {
		cx_setup_chan (d->chan);
		cx_start_chan (d->chan, 0, 0);
		cx_set_dtr (d->chan, 1);
		cx_set_rts (d->chan, 1);
		cx_start (d);
	}
	CX_UNLOCK (bd);
	splx (s);
}

/*
 * Transmit callback function.
 */
static void cx_transmit (cx_chan_t *c, void *attachment, int len)
{
	drv_t *d = c->sys;

	if (!d)
		return;
		
	if (c->mode == M_ASYNC && d->tty) {
		d->tty->t_state &= ~(TS_BUSY | TS_FLUSH);
		d->atimeout = 0;
		if (d->tty->t_dev) {
			d->intr_action |= CX_WRITE;
			MY_SOFT_INTR = 1;
			swi_sched (cx_fast_ih, 0);
		}
		return;
	}
#ifdef NETGRAPH
	d->timeout = 0;
#else
	++d->ifp->if_opackets;
	d->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
	d->ifp->if_timer = 0;
#endif
	cx_start (d);
}

/*
 * Process the received packet.
 */
static void cx_receive (cx_chan_t *c, char *data, int len)
{
	drv_t *d = c->sys;
	struct mbuf *m;
	char *cc = data;
#ifdef NETGRAPH
	int error;
#endif

	if (!d)
		return;
		
	if (c->mode == M_ASYNC && d->tty) {
		if (d->tty->t_state & TS_ISOPEN) {
			async_q *q = &d->aqueue;
			int size = BF_SZ - 1 - AQ_GSZ (q);

			if (len <= 0 && !size)
				return;

			if (len > size) {
				c->ierrs++;
				cx_error (c, CX_OVERRUN);
				len = size - 1;
			}

			while (len--) {
				AQ_PUSH (q, *(unsigned char *)cc);
				cc++;
			}

			d->intr_action |= CX_READ;
			MY_SOFT_INTR = 1;
			swi_sched (cx_fast_ih, 0);
		}
		return;
	}
	if (! d->running)
		return;

	m = makembuf (data, len);
	if (! m) {
		CX_DEBUG (d, ("no memory for packet\n"));
#ifndef NETGRAPH
		++d->ifp->if_iqdrops;
#endif
		return;
	}
	if (c->debug > 1)
		printmbuf (m);
#ifdef NETGRAPH
	m->m_pkthdr.rcvif = 0;
	NG_SEND_DATA_ONLY (error, d->hook, m);
#else
	++d->ifp->if_ipackets;
	m->m_pkthdr.rcvif = d->ifp;
	/* Check if there's a BPF listener on this interface.
	 * If so, hand off the raw packet to bpf. */
	BPF_TAP (d->ifp, data, len);
	IF_ENQUEUE (&d->queue, m);
#endif
}

#define CONDITION(t,tp) (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))\
	    && (!(tp->t_iflag & BRKINT) || (tp->t_iflag & IGNBRK))\
	    && (!(tp->t_iflag & PARMRK)\
		|| (tp->t_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))\
	    && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))\
	    && linesw[tp->t_line]->l_rint == ttyinput)

/*
 * Error callback function.
 */
static void cx_error (cx_chan_t *c, int data)
{
	drv_t *d = c->sys;
	async_q *q;

	if (!d)
		return;

	q = &(d->aqueue);

	switch (data) {
	case CX_FRAME:
		CX_DEBUG (d, ("frame error\n"));
		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN)
			&& (AQ_GSZ (q) < BF_SZ - 1)
			&& (!CONDITION((&d->tty->t_termios), (d->tty))
			|| !(d->tty->t_iflag & (IGNPAR | PARMRK)))) {
			AQ_PUSH (q, TTY_FE);
			d->intr_action |= CX_READ;
			MY_SOFT_INTR = 1;
			swi_sched (cx_fast_ih, 0);
		}
#ifndef NETGRAPH
		else
			++d->ifp->if_ierrors;
#endif
		break;
	case CX_CRC:
		CX_DEBUG (d, ("crc error\n"));
		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN)
			&& (AQ_GSZ (q) < BF_SZ - 1)
			&& (!CONDITION((&d->tty->t_termios), (d->tty))
			|| !(d->tty->t_iflag & INPCK)
			|| !(d->tty->t_iflag & (IGNPAR | PARMRK)))) {
			AQ_PUSH (q, TTY_PE);
			d->intr_action |= CX_READ;
			MY_SOFT_INTR = 1;
			swi_sched (cx_fast_ih, 0);
		}
#ifndef NETGRAPH
		else
			++d->ifp->if_ierrors;
#endif
		break;
	case CX_OVERRUN:
		CX_DEBUG (d, ("overrun error\n"));
#ifdef TTY_OE
		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN)
			&& (AQ_GSZ (q) < BF_SZ - 1)
			&& (!CONDITION((&d->tty->t_termios), (d->tty)))) {
			AQ_PUSH (q, TTY_OE);
			d->intr_action |= CX_READ;
			MY_SOFT_INTR = 1;
			swi_sched (cx_fast_ih, 0);
		}
#endif
#ifndef NETGRAPH
		else {
			++d->ifp->if_collisions;
			++d->ifp->if_ierrors;
		}
#endif
		break;
	case CX_OVERFLOW:
		CX_DEBUG (d, ("overflow error\n"));
#ifndef NETGRAPH
		if (c->mode != M_ASYNC)
			++d->ifp->if_ierrors;
#endif
		break;
	case CX_UNDERRUN:
		CX_DEBUG (d, ("underrun error\n"));
		if (c->mode != M_ASYNC) {
#ifdef NETGRAPH
			d->timeout = 0;
#else
			++d->ifp->if_oerrors;
			d->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
			d->ifp->if_timer = 0;
			cx_start (d);
#endif
		}
		break;
	case CX_BREAK:
		CX_DEBUG (d, ("break error\n"));
		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN)
			&& (AQ_GSZ (q) < BF_SZ - 1)
			&& (!CONDITION((&d->tty->t_termios), (d->tty))
			|| !(d->tty->t_iflag & (IGNBRK | BRKINT | PARMRK)))) {
			AQ_PUSH (q, TTY_BI);
			d->intr_action |= CX_READ;
			MY_SOFT_INTR = 1;
			swi_sched (cx_fast_ih, 0);
		}
#ifndef NETGRAPH
		else
			++d->ifp->if_ierrors;
#endif
		break;
	default:
		CX_DEBUG (d, ("error #%d\n", data));
	}
}

static int cx_topen (struct tty *tp, struct cdev *dev)
{
	bdrv_t *bd;
	drv_t *d;

	d = tp->t_sc;
	CX_DEBUG2 (d, ("cx_open (serial)\n"));

	bd = d->board->sys;

	if (d->chan->mode != M_ASYNC)
		return (EBUSY);

	d->open_dev |= 0x2;
	CX_LOCK (bd);
	cx_start_chan (d->chan, 0, 0);
	cx_set_dtr (d->chan, 1);
	cx_set_rts (d->chan, 1);
	d->cd = cx_get_cd (d->chan);
	CX_UNLOCK (bd);

	CX_DEBUG2 (d, ("cx_open done\n"));

	return 0;
}

static void cx_tclose (struct tty *tp)
{
	drv_t *d;
	bdrv_t *bd;

	d = tp->t_sc;
	CX_DEBUG2 (d, ("cx_close\n"));
	bd = d->board->sys;
	CX_LOCK (bd);
	/* Disable receiver.
	 * Transmitter continues sending the queued data. */
	cx_enable_receive (d->chan, 0);
	CX_UNLOCK (bd);
	d->open_dev &= ~0x2;
}

static int cx_tmodem (struct tty *tp, int sigon, int sigoff)
{
	drv_t *d;
	bdrv_t *bd;

	d = tp->t_sc;
	bd = d->board->sys;

	CX_LOCK (bd);
	if (!sigon && !sigoff) {
		if (cx_get_dsr (d->chan)) sigon |= SER_DSR;
		if (cx_get_cd  (d->chan)) sigon |= SER_DCD;
		if (cx_get_cts (d->chan)) sigon |= SER_CTS;
		if (d->chan->dtr)	  sigon |= SER_DTR;
		if (d->chan->rts)	  sigon |= SER_RTS;
		CX_UNLOCK (bd);
		return sigon;
	}

	if (sigon & SER_DTR)
		cx_set_dtr (d->chan, 1);
	if (sigoff & SER_DTR)
		cx_set_dtr (d->chan, 0);
	if (sigon & SER_RTS)
		cx_set_rts (d->chan, 1);
	if (sigoff & SER_RTS)
		cx_set_rts (d->chan, 0);
	CX_UNLOCK (bd);

	return (0);
}

static int cx_open (struct cdev *dev, int flag, int mode, struct thread *td)
{
	int unit;
	drv_t *d;

	d = dev->si_drv1;
	unit = d->chan->num;

	CX_DEBUG2 (d, ("cx_open unit=%d, flag=0x%x, mode=0x%x\n",
		    unit, flag, mode));

	d->open_dev |= 0x1;

	CX_DEBUG2 (d, ("cx_open done\n"));

	return 0;
}

static int cx_close (struct cdev *dev, int flag, int mode, struct thread *td)
{
	drv_t *d;

	d = dev->si_drv1;
	CX_DEBUG2 (d, ("cx_close\n"));
	d->open_dev &= ~0x1;
	return 0;
}

static int cx_modem_status (drv_t *d)
{
	bdrv_t *bd = d->board->sys;
	int status = 0, s = splhigh ();
	CX_LOCK (bd);
	/* Already opened by someone or network interface is up? */
	if ((d->chan->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN) &&
	    (d->open_dev|0x2)) || (d->chan->mode != M_ASYNC && d->running))
		status = TIOCM_LE;	/* always enabled while open */

	if (cx_get_dsr (d->chan)) status |= TIOCM_DSR;
	if (cx_get_cd  (d->chan)) status |= TIOCM_CD;
	if (cx_get_cts (d->chan)) status |= TIOCM_CTS;
	if (d->chan->dtr)	  status |= TIOCM_DTR;
	if (d->chan->rts)	  status |= TIOCM_RTS;
	CX_UNLOCK (bd);
	splx (s);
	return status;
}

static int cx_ioctl (struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
{
	drv_t *d;
	bdrv_t *bd;
	cx_chan_t *c;
	struct serial_statistics *st;
	int error, s;
	char mask[16];

	d = dev->si_drv1;
	c = d->chan;
		
	bd = d->board->sys;
	
	switch (cmd) {
	case SERIAL_GETREGISTERED:
		CX_DEBUG2 (d, ("ioctl: getregistered\n"));
		bzero (mask, sizeof(mask));
		for (s=0; s<NCX*NCHAN; ++s)
			if (channel [s])
				mask [s/8] |= 1 << (s & 7);
		bcopy (mask, data, sizeof (mask));
		return 0;

	case SERIAL_GETPORT:
		CX_DEBUG2 (d, ("ioctl: getport\n"));
		s = splhigh ();
		CX_LOCK (bd);
		*(int *)data = cx_get_port (c);
		CX_UNLOCK (bd);
		splx (s);
		if (*(int *)data<0)
			return (EINVAL);
		else
			return 0;

	case SERIAL_SETPORT:
		CX_DEBUG2 (d, ("ioctl: setproto\n"));
		/* Only for superuser! */
		error = priv_check (td, PRIV_DRIVER);
		if (error)
			return error;

		s = splhigh ();
		CX_LOCK (bd);
		cx_set_port (c, *(int *)data);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

#ifndef NETGRAPH
	case SERIAL_GETPROTO:
		CX_DEBUG2 (d, ("ioctl: getproto\n"));
		s = splhigh ();
		CX_LOCK (bd);
		strcpy ((char*)data, (c->mode == M_ASYNC) ? "async" :
			(IFP2SP(d->ifp)->pp_flags & PP_FR) ? "fr" :
			(d->ifp->if_flags & PP_CISCO) ? "cisco" : "ppp");
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_SETPROTO:
		CX_DEBUG2 (d, ("ioctl: setproto\n"));
		/* Only for superuser! */
		error = priv_check (td, PRIV_DRIVER);
		if (error)
			return error;
		if (c->mode == M_ASYNC)
			return EBUSY;
		if (d->ifp->if_drv_flags & IFF_DRV_RUNNING)
			return EBUSY;
		if (! strcmp ("cisco", (char*)data)) {
			IFP2SP(d->ifp)->pp_flags &= ~(PP_FR);
			IFP2SP(d->ifp)->pp_flags |= PP_KEEPALIVE;
			d->ifp->if_flags |= PP_CISCO;
		} else if (! strcmp ("fr", (char*)data)) {
			d->ifp->if_flags &= ~(PP_CISCO);
			IFP2SP(d->ifp)->pp_flags |= PP_FR | PP_KEEPALIVE;
		} else if (! strcmp ("ppp", (char*)data)) {
			IFP2SP(d->ifp)->pp_flags &= ~(PP_FR | PP_KEEPALIVE);
			d->ifp->if_flags &= ~(PP_CISCO);
		} else
			return EINVAL;
		return 0;

	case SERIAL_GETKEEPALIVE:
		CX_DEBUG2 (d, ("ioctl: getkeepalive\n"));
		if ((IFP2SP(d->ifp)->pp_flags & PP_FR) ||
		    (d->ifp->if_flags & PP_CISCO) ||
		    (c->mode == M_ASYNC))
			return EINVAL;
		s = splhigh ();
		CX_LOCK (bd);
		*(int*)data = (IFP2SP(d->ifp)->pp_flags & PP_KEEPALIVE) ? 1 : 0;
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_SETKEEPALIVE:
		CX_DEBUG2 (d, ("ioctl: setkeepalive\n"));
		/* Only for superuser! */
		error = priv_check (td, PRIV_DRIVER);
		if (error)
			return error;
		if ((IFP2SP(d->ifp)->pp_flags & PP_FR) ||
			(d->ifp->if_flags & PP_CISCO))
			return EINVAL;
		s = splhigh ();
		CX_LOCK (bd);
		if (*(int*)data)
			IFP2SP(d->ifp)->pp_flags |= PP_KEEPALIVE;
		else
			IFP2SP(d->ifp)->pp_flags &= ~PP_KEEPALIVE;
		CX_UNLOCK (bd);
		splx (s);
		return 0;
#endif /*NETGRAPH*/

	case SERIAL_GETMODE:
		CX_DEBUG2 (d, ("ioctl: getmode\n"));
		s = splhigh ();
		CX_LOCK (bd);
		*(int*)data = (c->mode == M_ASYNC) ?
			SERIAL_ASYNC : SERIAL_HDLC;
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_SETMODE:
		CX_DEBUG2 (d, ("ioctl: setmode\n"));
		/* Only for superuser! */
		error = priv_check (td, PRIV_DRIVER);
		if (error)
			return error;

		/* Somebody is waiting for carrier? */
		if (d->lock)
			return EBUSY;
		/* /dev/ttyXX is already opened by someone? */
		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN) &&
		    (d->open_dev|0x2))
			return EBUSY;
		/* Network interface is up?
		 * Cannot change to async mode. */
		if (c->mode != M_ASYNC && d->running &&
		    (*(int*)data == SERIAL_ASYNC))
			return EBUSY;

		s = splhigh ();
		CX_LOCK (bd);
		if (c->mode == M_HDLC && *(int*)data == SERIAL_ASYNC) {
			cx_set_mode (c, M_ASYNC);
			cx_enable_receive (c, 0);
			cx_enable_transmit (c, 0);
		} else if (c->mode == M_ASYNC && *(int*)data == SERIAL_HDLC) {
			cx_set_mode (c, M_HDLC);
			cx_enable_receive (c, 1);
			cx_enable_transmit (c, 1);
		}
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_GETSTAT:
		CX_DEBUG2 (d, ("ioctl: getestat\n"));
		st = (struct serial_statistics*) data;
		s = splhigh ();
		CX_LOCK (bd);
		st->rintr  = c->rintr;
		st->tintr  = c->tintr;
		st->mintr  = c->mintr;
		st->ibytes = c->ibytes;
		st->ipkts  = c->ipkts;
		st->ierrs  = c->ierrs;
		st->obytes = c->obytes;
		st->opkts  = c->opkts;
		st->oerrs  = c->oerrs;
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_CLRSTAT:
		CX_DEBUG2 (d, ("ioctl: clrstat\n"));
		/* Only for superuser! */
		error = priv_check (td, PRIV_DRIVER);
		if (error)
			return error;
		s = splhigh ();
		CX_LOCK (bd);
		c->rintr = 0;
		c->tintr = 0;
		c->mintr = 0;
		c->ibytes = 0;
		c->ipkts = 0;
		c->ierrs = 0;
		c->obytes = 0;
		c->opkts = 0;
		c->oerrs = 0;
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_GETBAUD:
		CX_DEBUG2 (d, ("ioctl: getbaud\n"));
		if (c->mode == M_ASYNC)
			return EINVAL;
		s = splhigh ();
		CX_LOCK (bd);
		*(long*)data = cx_get_baud(c);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_SETBAUD:
		CX_DEBUG2 (d, ("ioctl: setbaud\n"));
		/* Only for superuser! */
		error = priv_check (td, PRIV_DRIVER);
		if (error)
			return error;
		if (c->mode == M_ASYNC)
			return EINVAL;
		s = splhigh ();
		CX_LOCK (bd);
		cx_set_baud (c, *(long*)data);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_GETLOOP:
		CX_DEBUG2 (d, ("ioctl: getloop\n"));
		if (c->mode == M_ASYNC)
			return EINVAL;
		s = splhigh ();
		CX_LOCK (bd);
		*(int*)data = cx_get_loop (c);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_SETLOOP:
		CX_DEBUG2 (d, ("ioctl: setloop\n"));
		/* Only for superuser! */
		error = priv_check (td, PRIV_DRIVER);
		if (error)
			return error;
		if (c->mode == M_ASYNC)
			return EINVAL;
		s = splhigh ();
		CX_LOCK (bd);
		cx_set_loop (c, *(int*)data);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_GETDPLL:
		CX_DEBUG2 (d, ("ioctl: getdpll\n"));
		if (c->mode == M_ASYNC)
			return EINVAL;
		s = splhigh ();
		CX_LOCK (bd);
		*(int*)data = cx_get_dpll (c);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_SETDPLL:
		CX_DEBUG2 (d, ("ioctl: setdpll\n"));
		/* Only for superuser! */
		error = priv_check (td, PRIV_DRIVER);
		if (error)
			return error;
		if (c->mode == M_ASYNC)
			return EINVAL;
		s = splhigh ();
		CX_LOCK (bd);
		cx_set_dpll (c, *(int*)data);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_GETNRZI:
		CX_DEBUG2 (d, ("ioctl: getnrzi\n"));
		if (c->mode == M_ASYNC)
			return EINVAL;
		s = splhigh ();
		CX_LOCK (bd);
		*(int*)data = cx_get_nrzi (c);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_SETNRZI:
		CX_DEBUG2 (d, ("ioctl: setnrzi\n"));
		/* Only for superuser! */
		error = priv_check (td, PRIV_DRIVER);
		if (error)
			return error;
		if (c->mode == M_ASYNC)
			return EINVAL;
		s = splhigh ();
		CX_LOCK (bd);
		cx_set_nrzi (c, *(int*)data);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_GETDEBUG:
		CX_DEBUG2 (d, ("ioctl: getdebug\n"));
		s = splhigh ();
		CX_LOCK (bd);
		*(int*)data = c->debug;
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case SERIAL_SETDEBUG:
		CX_DEBUG2 (d, ("ioctl: setdebug\n"));
		/* Only for superuser! */
		error = priv_check (td, PRIV_DRIVER);
		if (error)
			return error;
		s = splhigh ();
		CX_LOCK (bd);
		c->debug = *(int*)data;
		CX_UNLOCK (bd);
		splx (s);
#ifndef	NETGRAPH
		if (d->chan->debug)
			d->ifp->if_flags |= IFF_DEBUG;
		else
			d->ifp->if_flags &= (~IFF_DEBUG);
#endif
		return 0;
	}

	switch (cmd) {
	case TIOCSDTR:	/* Set DTR */
		CX_DEBUG2 (d, ("ioctl: tiocsdtr\n"));
		s = splhigh ();
		CX_LOCK (bd);
		cx_set_dtr (c, 1);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case TIOCCDTR:	/* Clear DTR */
		CX_DEBUG2 (d, ("ioctl: tioccdtr\n"));
		s = splhigh ();
		CX_LOCK (bd);
		cx_set_dtr (c, 0);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case TIOCMSET:	/* Set DTR/RTS */
		CX_DEBUG2 (d, ("ioctl: tiocmset\n"));
		s = splhigh ();
		CX_LOCK (bd);
		cx_set_dtr (c, (*(int*)data & TIOCM_DTR) ? 1 : 0);
		cx_set_rts (c, (*(int*)data & TIOCM_RTS) ? 1 : 0);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case TIOCMBIS:	/* Add DTR/RTS */
		CX_DEBUG2 (d, ("ioctl: tiocmbis\n"));
		s = splhigh ();
		CX_LOCK (bd);
		if (*(int*)data & TIOCM_DTR) cx_set_dtr (c, 1);
		if (*(int*)data & TIOCM_RTS) cx_set_rts (c, 1);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case TIOCMBIC:	/* Clear DTR/RTS */
		CX_DEBUG2 (d, ("ioctl: tiocmbic\n"));
		s = splhigh ();
		CX_LOCK (bd);
		if (*(int*)data & TIOCM_DTR) cx_set_dtr (c, 0);
		if (*(int*)data & TIOCM_RTS) cx_set_rts (c, 0);
		CX_UNLOCK (bd);
		splx (s);
		return 0;

	case TIOCMGET:	/* Get modem status */
		CX_DEBUG2 (d, ("ioctl: tiocmget\n"));
		*(int*)data = cx_modem_status (d);
		return 0;

	}

	CX_DEBUG2 (d, ("ioctl: 0x%lx\n", cmd));
	return ENOTTY;
}

void cx_softintr (void *unused)
{
	drv_t *d;
	bdrv_t *bd;
	async_q *q;
	int i, s, ic, k;
	while (MY_SOFT_INTR) {
		MY_SOFT_INTR = 0;
		for (i=0; i<NCX*NCHAN; ++i) {
			d = channel [i];
			if (!d || !d->chan || d->chan->type == T_NONE
			    || d->chan->mode != M_ASYNC || !d->tty
			    || !d->tty->t_dev)
				continue;
			bd = d->board->sys;
			s = splhigh ();
			CX_LOCK (bd);
			if (d->intr_action & CX_READ) {
				q = &(d->aqueue);
				if (d->tty->t_state & TS_CAN_BYPASS_L_RINT) {
					k = AQ_GSZ(q);
					if (d->tty->t_rawq.c_cc + k >
						d->tty->t_ihiwat
					    && (d->tty->t_cflag & CRTS_IFLOW
						|| d->tty->t_iflag & IXOFF)
					    && !(d->tty->t_state & TS_TBLOCK))
						ttyblock(d->tty);
					d->tty->t_rawcc += k;
					while (k>0) {
						k--;
						AQ_POP (q, ic);
						CX_UNLOCK (bd);
						splx (s);
						putc (ic, &d->tty->t_rawq);
						s = splhigh ();
						CX_LOCK (bd);
					}
					ttwakeup(d->tty);
					if (d->tty->t_state & TS_TTSTOP
					    && (d->tty->t_iflag & IXANY
						|| d->tty->t_cc[VSTART] ==
						d->tty->t_cc[VSTOP])) {
						d->tty->t_state &= ~TS_TTSTOP;
						d->tty->t_lflag &= ~FLUSHO;
						d->intr_action |= CX_WRITE;
					}
				} else {
					while (q->end != q->beg) {
						AQ_POP (q, ic);
						CX_UNLOCK (bd);
						splx (s);
						ttyld_rint (d->tty, ic);
						s = splhigh ();
						CX_LOCK (bd);
					}
				}
				d->intr_action &= ~CX_READ;
			}
			splx (s);
			CX_UNLOCK (bd);

			s = splhigh ();
			CX_LOCK (bd);
			if (d->intr_action & CX_WRITE) {
				if (d->tty->t_line)
					ttyld_start (d->tty);
				else
					cx_oproc (d->tty);
				d->intr_action &= ~CX_WRITE;
			}
			CX_UNLOCK (bd);
			splx (s);

		}
	}
}

/*
 * Fill transmitter buffer with data.
 */
static void cx_oproc (struct tty *tp)
{
	int s, k;
	drv_t *d;
	bdrv_t *bd;
	static u_char buf[DMABUFSZ];
	u_char *p;
	u_short len = 0, sublen = 0;

	d = tp->t_sc;
	bd = d->board->sys;

	CX_DEBUG2 (d, ("cx_oproc\n"));

	s = splhigh ();
	CX_LOCK (bd);

	if (tp->t_cflag & CRTSCTS && (tp->t_state & TS_TBLOCK) && d->chan->rts)
		cx_set_rts (d->chan, 0);
	else if (tp->t_cflag & CRTSCTS && ! (tp->t_state & TS_TBLOCK) && ! d->chan->rts)
		cx_set_rts (d->chan, 1);

	if (! (tp->t_state & (TS_TIMEOUT | TS_TTSTOP))) {
		/* Start transmitter. */
		cx_enable_transmit (d->chan, 1);

		/* Is it busy? */
		if (! cx_buf_free (d->chan)) {
			tp->t_state |= TS_BUSY;
			CX_UNLOCK (bd);
			splx (s);
			return;
		}
		if (tp->t_iflag & IXOFF) {
			p = (buf + (DMABUFSZ/2));
			sublen = q_to_b (&tp->t_outq, p, (DMABUFSZ/2));
			k = sublen;
			while (k--) {
				/* Send XON/XOFF out of band. */
				if (*p == tp->t_cc[VSTOP]) {
					cx_xflow_ctl (d->chan, 0);
					p++;
					continue;
				}
				if (*p == tp->t_cc[VSTART]) {
					cx_xflow_ctl (d->chan, 1);
					p++;
					continue;
				}
				buf[len] = *p;
				len++;
				p++;
			}
		} else {
			p = buf;
			len = q_to_b (&tp->t_outq, p, (DMABUFSZ/2));
		}
		if (len) {
			cx_send_packet (d->chan, buf, len, 0);
			tp->t_state |= TS_BUSY;
			d->atimeout = 10;
			CX_DEBUG2 (d, ("out %d bytes\n", len));
		}
	}
	ttwwakeup (tp);
	CX_UNLOCK (bd);
	splx (s);
}

static int cx_param (struct tty *tp, struct termios *t)
{
	drv_t *d;
	bdrv_t *bd;
	int s, bits, parity;

	d = tp->t_sc;
	bd = d->board->sys;
	
	s = splhigh ();
	CX_LOCK (bd);
	if (t->c_ospeed == 0) {
		/* Clear DTR and RTS. */
		cx_set_dtr (d->chan, 0);
		CX_UNLOCK (bd);
		splx (s);
		CX_DEBUG2 (d, ("cx_param (hangup)\n"));
		return 0;
	}
	CX_DEBUG2 (d, ("cx_param\n"));

	/* Check requested parameters. */
	if (t->c_ospeed < 300 || t->c_ospeed > 256*1024) {
		CX_UNLOCK (bd);
		splx (s);
		return EINVAL;
	}
	if (t->c_ispeed && (t->c_ispeed < 300 || t->c_ispeed > 256*1024)) {
		CX_UNLOCK (bd);
		splx (s);
		return EINVAL;
	}

  	/* And copy them to tty and channel structures. */
	tp->t_ispeed = t->c_ispeed = tp->t_ospeed = t->c_ospeed;
	tp->t_cflag = t->c_cflag;

	/* Set character length and parity mode. */
	switch (t->c_cflag & CSIZE) {
	default:
	case CS8: bits = 8; break;
	case CS7: bits = 7; break;
	case CS6: bits = 6; break;
	case CS5: bits = 5; break;
	}

	parity = ((t->c_cflag & PARENB) ? 1 : 0) *
		 (1 + ((t->c_cflag & PARODD) ? 0 : 1));

	/* Set current channel number. */
	if (! d->chan->dtr)
		cx_set_dtr (d->chan, 1);

	ttyldoptim (tp);
	cx_set_async_param (d->chan, t->c_ospeed, bits, parity, (t->c_cflag & CSTOPB),
		!(t->c_cflag & PARENB), (t->c_cflag & CRTSCTS),
		(t->c_iflag & IXON), (t->c_iflag & IXANY),
		t->c_cc[VSTART], t->c_cc[VSTOP]);
	CX_UNLOCK (bd);
	splx (s);
	return 0;
}

/*
 * Stop output on a line
 */
static void cx_stop (struct tty *tp, int flag)
{
	drv_t *d;
	bdrv_t *bd;
	int s;

	d = tp->t_sc;
	bd = d->board->sys;
	
	s = splhigh ();
	CX_LOCK (bd);
	if (tp->t_state & TS_BUSY) {
		/* Stop transmitter */
		CX_DEBUG2 (d, ("cx_stop\n"));
		cx_transmitter_ctl (d->chan, 0);
	}
	CX_UNLOCK (bd);
	splx (s);
}

/*
 * Process the (delayed) carrier signal setup.
 */
static void cx_carrier (void *arg)
{
	drv_t *d = arg;
	bdrv_t *bd = d->board->sys;
	cx_chan_t *c = d->chan;
	int s, cd;

	s = splhigh ();
	CX_LOCK (bd);
	cd = cx_get_cd (c);
	if (d->cd != cd) {
		if (cd) {
			CX_DEBUG (d, ("carrier on\n"));
			d->cd = 1;
			CX_UNLOCK (bd);
			splx (s);
			if (d->tty)
				ttyld_modem(d->tty, 1);
		} else {
			CX_DEBUG (d, ("carrier loss\n"));
			d->cd = 0;
			CX_UNLOCK (bd);
			splx (s);
			if (d->tty)
				ttyld_modem(d->tty, 0);
		}
	} else {
		CX_UNLOCK (bd);
		splx (s);
	}
}

/*
 * Modem signal callback function.
 */
static void cx_modem (cx_chan_t *c)
{
	drv_t *d = c->sys;

	if (!d || c->mode != M_ASYNC)
		return;
	/* Handle carrier detect/loss. */
	/* Carrier changed - delay processing DCD for a while
	 * to give both sides some time to initialize. */
	callout_reset (&d->dcd_timeout_handle, hz/2, cx_carrier, d);
}

#ifdef NETGRAPH
static int ng_cx_constructor (node_p node)
{
	drv_t *d = NG_NODE_PRIVATE (node);
	CX_DEBUG (d, ("Constructor\n"));
	return EINVAL;
}

static int ng_cx_newhook (node_p node, hook_p hook, const char *name)
{
	int s;
	drv_t *d = NG_NODE_PRIVATE (node);
	bdrv_t *bd = d->board->sys;

	if (d->chan->mode == M_ASYNC)
		return EINVAL;

	/* Attach debug hook */
	if (strcmp (name, NG_CX_HOOK_DEBUG) == 0) {
		NG_HOOK_SET_PRIVATE (hook, NULL);
		d->debug_hook = hook;
		return 0;
	}

	/* Check for raw hook */
	if (strcmp (name, NG_CX_HOOK_RAW) != 0)
		return EINVAL;

	NG_HOOK_SET_PRIVATE (hook, d);
	d->hook = hook;
	s = splhigh ();
	CX_LOCK (bd);
	cx_up (d);
	CX_UNLOCK (bd);
	splx (s);
	return 0;
}

static int print_modems (char *s, cx_chan_t *c, int need_header)
{
	int status = cx_modem_status (c->sys);
	int length = 0;

	if (need_header)
		length += sprintf (s + length, "  LE   DTR  DSR  RTS  CTS  CD\n");
	length += sprintf (s + length, "%4s %4s %4s %4s %4s %4s\n",
		status & TIOCM_LE  ? "On" : "-",
		status & TIOCM_DTR ? "On" : "-",
		status & TIOCM_DSR ? "On" : "-",
		status & TIOCM_RTS ? "On" : "-",
		status & TIOCM_CTS ? "On" : "-",
		status & TIOCM_CD  ? "On" : "-");
	return length;
}

static int print_stats (char *s, cx_chan_t *c, int need_header)
{
	int length = 0;

	if (need_header)
		length += sprintf (s + length, "  Rintr   Tintr   Mintr   Ibytes   Ipkts   Ierrs   Obytes   Opkts   Oerrs\n");
	length += sprintf (s + length, "%7ld %7ld %7ld %8ld %7ld %7ld %8ld %7ld %7ld\n",
		c->rintr, c->tintr, c->mintr, c->ibytes, c->ipkts,
		c->ierrs, c->obytes, c->opkts, c->oerrs);
	return length;
}

static int print_chan (char *s, cx_chan_t *c)
{
	drv_t *d = c->sys;
	int length = 0;

	length += sprintf (s + length, "cx%d", c->board->num * NCHAN + c->num);
	if (d->chan->debug)
		length += sprintf (s + length, " debug=%d", d->chan->debug);

	if (cx_get_baud (c))
		length += sprintf (s + length, " %ld", cx_get_baud (c));
	else
		length += sprintf (s + length, " extclock");

	if (c->mode == M_HDLC) {
		length += sprintf (s + length, " dpll=%s", cx_get_dpll (c) ? "on" : "off");
		length += sprintf (s + length, " nrzi=%s", cx_get_nrzi (c) ? "on" : "off");
	}

	length += sprintf (s + length, " loop=%s", cx_get_loop (c) ? "on\n" : "off\n");
	return length;
}

static int ng_cx_rcvmsg (node_p node, item_p item, hook_p lasthook)
{
	drv_t *d = NG_NODE_PRIVATE (node);
	struct ng_mesg *msg;
	struct ng_mesg *resp = NULL;
	int error = 0;

	if (!d)
		return EINVAL;
		
	CX_DEBUG (d, ("Rcvmsg\n"));
	NGI_GET_MSG (item, msg);
	switch (msg->header.typecookie) {
	default:
		error = EINVAL;
		break;

	case NGM_CX_COOKIE:
		printf ("Don't forget to implement\n");
		error = EINVAL;
		break;

	case NGM_GENERIC_COOKIE:
		switch (msg->header.cmd) {
		default:
			error = EINVAL;
			break;

		case NGM_TEXT_STATUS: {
			char *s;
			int l = 0;
			int dl = sizeof (struct ng_mesg) + 730;

			NG_MKRESPONSE (resp, msg, dl, M_NOWAIT);
			if (! resp) {
				error = ENOMEM;
				break;
			}
			bzero (resp, dl);
			s = (resp)->data;
			l += print_chan (s + l, d->chan);
			l += print_stats (s + l, d->chan, 1);
			l += print_modems (s + l, d->chan, 1);
			strncpy ((resp)->header.cmdstr, "status", NG_CMDSTRLEN);
			}
			break;
		}
		break;
	}
	NG_RESPOND_MSG (error, node, item, resp);
	NG_FREE_MSG (msg);
	return error;
}

static int ng_cx_rcvdata (hook_p hook, item_p item)
{
	drv_t *d = NG_NODE_PRIVATE (NG_HOOK_NODE(hook));
	struct mbuf *m;
	struct ng_tag_prio *ptag;
	bdrv_t *bd;
	struct ifqueue *q;
	int s;

	NGI_GET_M (item, m);
	NG_FREE_ITEM (item);
	if (! NG_HOOK_PRIVATE (hook) || ! d) {
		NG_FREE_M (m);
		return ENETDOWN;
	}

	bd = d->board->sys;
	/* Check for high priority data */
	if ((ptag = (struct ng_tag_prio *)m_tag_locate(m, NGM_GENERIC_COOKIE,
	    NG_TAG_PRIO, NULL)) != NULL && (ptag->priority > NG_PRIO_CUTOFF) )
		q = &d->hi_queue;
	else
		q = &d->lo_queue;

	s = splhigh ();
	CX_LOCK (bd);
	IF_LOCK (q);
	if (_IF_QFULL (q)) {
		_IF_DROP (q);
		IF_UNLOCK (q);
		CX_UNLOCK (bd);
		splx (s);
		NG_FREE_M (m);
		return ENOBUFS;
	}
	_IF_ENQUEUE (q, m);
	IF_UNLOCK (q);
	cx_start (d);
	CX_UNLOCK (bd);
	splx (s);
	return 0;
}

static int ng_cx_rmnode (node_p node)
{
	drv_t *d = NG_NODE_PRIVATE (node);
	bdrv_t *bd;

	CX_DEBUG (d, ("Rmnode\n"));
	if (d && d->running) {
		int s = splhigh ();
		bd = d->board->sys;
		CX_LOCK (bd);
		cx_down (d);
		CX_UNLOCK (bd);
		splx (s);
	}
#ifdef	KLD_MODULE
	if (node->nd_flags & NGF_REALLY_DIE) {
		NG_NODE_SET_PRIVATE (node, NULL);
		NG_NODE_UNREF (node);
	}
	NG_NODE_REVIVE(node);		/* Persistant node */
#endif
	return 0;
}

static void ng_cx_watchdog (void *arg)
{
	drv_t *d = arg;

	if (d->timeout == 1)
		cx_watchdog (d);
	if (d->timeout)
		d->timeout--;
	callout_reset (&d->timeout_handle, hz, ng_cx_watchdog, d);
}

static int ng_cx_connect (hook_p hook)
{
	drv_t *d = NG_NODE_PRIVATE (NG_HOOK_NODE (hook));

	callout_reset (&d->timeout_handle, hz, ng_cx_watchdog, d);
	return 0;
}

static int ng_cx_disconnect (hook_p hook)
{
	drv_t *d = NG_NODE_PRIVATE (NG_HOOK_NODE (hook));
	bdrv_t *bd = d->board->sys;
	int s;

	s = splhigh ();
	CX_LOCK (bd);
	if (NG_HOOK_PRIVATE (hook))
		cx_down (d);
	CX_UNLOCK (bd);
	splx (s);
	/* If we were wait it than it reasserted now, just stop it. */
	if (!callout_drain (&d->timeout_handle))
		callout_stop (&d->timeout_handle);
	return 0;
}
#endif /*NETGRAPH*/

static int cx_modevent (module_t mod, int type, void *unused)
{
	static int load_count = 0;

	if (!debug_mpsafenet && cx_mpsafenet) {
		printf ("WORNING! Network stack is not MPSAFE. "
			"Turning off debug.cx.mpsafenet.\n");
		cx_mpsafenet = 0;
	}
	if (cx_mpsafenet)
		cx_cdevsw.d_flags &= ~D_NEEDGIANT;

	switch (type) {
	case MOD_LOAD:
#ifdef NETGRAPH
		if (ng_newtype (&typestruct))
			printf ("Failed to register ng_cx\n");
#endif
		++load_count;

		callout_init (&timeout_handle, cx_mpsafenet?CALLOUT_MPSAFE:0);
		callout_reset (&timeout_handle, hz*5, cx_timeout, 0);
		/* Software interrupt. */
		swi_add(&tty_intr_event, "cx", cx_softintr, NULL, SWI_TTY,
		    (cx_mpsafenet?INTR_MPSAFE:0), &cx_fast_ih);
		break;
	case MOD_UNLOAD:
		if (load_count == 1) {
			printf ("Removing device entry for Sigma\n");
#ifdef NETGRAPH
			ng_rmtype (&typestruct);
#endif			
		}
		/* If we were wait it than it reasserted now, just stop it. */
		if (!callout_drain (&timeout_handle))
			callout_stop (&timeout_handle);
		swi_remove (cx_fast_ih);
		--load_count;
		break;
	case MOD_SHUTDOWN:
		break;
	}
	return 0;
}

#ifdef NETGRAPH
static struct ng_type typestruct = {
	.version	= NG_ABI_VERSION,
	.name		= NG_CX_NODE_TYPE,
	.constructor	= ng_cx_constructor,
	.rcvmsg		= ng_cx_rcvmsg,
	.shutdown	= ng_cx_rmnode,
	.newhook	= ng_cx_newhook,
	.connect	= ng_cx_connect,
	.rcvdata	= ng_cx_rcvdata,
	.disconnect	= ng_cx_disconnect,
};
#endif /*NETGRAPH*/

#ifdef NETGRAPH
MODULE_DEPEND (ng_cx, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION);
#else
MODULE_DEPEND (isa_cx, sppp, 1, 1, 1);
#endif
DRIVER_MODULE (cx, isa, cx_isa_driver, cx_devclass, cx_modevent, NULL);
MODULE_VERSION (cx, 1);
OpenPOWER on IntegriCloud