summaryrefslogtreecommitdiff
path: root/target/linux/generic-2.4/patches/201-hfc_usb_backport.patch
blob: af084d8197df2a85f607add2b9e15d7dccd25589 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
Index: linux-2.4.35.4/drivers/Makefile
===================================================================
--- linux-2.4.35.4.orig/drivers/Makefile
+++ linux-2.4.35.4/drivers/Makefile
@@ -38,7 +38,7 @@ subdir-$(CONFIG_FUSION)		+= message/fusi
 subdir-$(CONFIG_MD)		+= md
 subdir-$(CONFIG_IEEE1394)	+= ieee1394
 subdir-$(CONFIG_PNP)		+= pnp
-subdir-$(CONFIG_ISDN_BOOL)	+= isdn
+subdir-$(CONFIG_ISDN)		+= isdn
 subdir-$(CONFIG_ATM)		+= atm
 subdir-$(CONFIG_FC4)		+= fc4
 
Index: linux-2.4.35.4/drivers/isdn/hisax/hfc_usb.c
===================================================================
--- linux-2.4.35.4.orig/drivers/isdn/hisax/hfc_usb.c
+++ linux-2.4.35.4/drivers/isdn/hisax/hfc_usb.c
@@ -1,13 +1,11 @@
-/* $Id: hfc_usb.c,v 2.3 2001/07/06 21:30:11 werner Exp $
+/*
+ * hfc_usb.c
  *
+ * modular HiSax ISDN driver for Colognechip HFC-USB chip
  *
- *
- * Author       (C) 2001 Werner Cornelius (werner@isdn-development.de)
- *              modular driver for Colognechip HFC-USB chip
- *              as plugin for HiSax isdn driver
- *              type approval valid for HFC-S USB based TAs
- *
- * Copyright 2001  by Werner Cornelius (werner@isdn-development.de)
+ * Authors : Peter Sprenger  (sprenger@moving-byters.de)
+ *           Martin Bachem   (info@colognechip.com)
+ *           based on the first hfc_usb driver of Werner Cornelius (werner@isdn-development.de)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -23,70 +21,90 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
- */
+ * 2005_Mar_16 grsch
+ *      ported 2.6.8 hfc_usb.c to 2.4.20 format
+ *      Gregor Schaffrath <gschaff@ran-dom.org>
+*/
+
 
 #include <linux/types.h>
 #include <linux/stddef.h>
 #include <linux/timer.h>
 #include <linux/config.h>
-#include <linux/isdn_compat.h>
 #include <linux/init.h>
 #include "hisax.h"
 #include <linux/module.h>
 #include <linux/kernel_stat.h>
-#include <linux/tqueue.h>
 #include <linux/usb.h>
 #include <linux/kernel.h>
 #include <linux/smp_lock.h>
 #include <linux/sched.h>
+#include "hisax_if.h"
 #include "hisax_loadable.h"
 
+static const char *hfcusb_revision = "4.0";
+
+/*
+	to enable much mire debug messages in this driver, define
+			VERBOSE_USB_DEBUG and VERBOSE_ISDN_DEBUG
+	below
+*/
+
+#define VERBOSE_USB_DEBUG 
+#define VERBOSE_ISDN_DEBUG 
+
 #define INCLUDE_INLINE_FUNCS
 
+#define TRUE  1
+#define FALSE 0
+
+
 /***********/
 /* defines */
 /***********/
-#define HFC_CTRL_TIMEOUT 5	/* 5ms timeout writing/reading regs */
-#define HFC_TIMER_T3     7000	/* timeout for l1 activation timer */
-
-#define HFCUSB_L1_STATECHANGE   0	/* L1 state changed */
-#define HFCUSB_L1_DRX           1	/* D-frame received */
-#define HFCUSB_L1_ERX           2	/* E-frame received */
-#define HFCUSB_L1_DTX           4	/* D-frames completed */
-
-#define MAX_BCH_SIZE        2048	/* allowed B-channel packet size */
-
-#define HFCUSB_RX_THRESHOLD 64	/* threshold for fifo report bit rx */
-#define HFCUSB_TX_THRESHOLD 64	/* threshold for fifo report bit tx */
-
-#define HFCUSB_CHIP_ID    0x16	/* Chip ID register index */
-#define HFCUSB_CIRM       0x00	/* cirm register index */
-#define HFCUSB_USB_SIZE   0x07	/* int length register */
-#define HFCUSB_USB_SIZE_I 0x06	/* iso length register */
-#define HFCUSB_F_CROSS    0x0b	/* bit order register */
-#define HFCUSB_CLKDEL     0x37	/* bit delay register */
-#define HFCUSB_CON_HDLC   0xfa	/* channel connect register */
+#define HFC_CTRL_TIMEOUT	20  //(HZ * USB_CTRL_GET_TIMEOUT)
+/* 5ms timeout writing/reading regs */
+#define HFC_TIMER_T3     8000      /* timeout for l1 activation timer */
+#define HFC_TIMER_T4     500       /* time for state change interval */
+
+#define HFCUSB_L1_STATECHANGE   0  /* L1 state changed */
+#define HFCUSB_L1_DRX           1  /* D-frame received */
+#define HFCUSB_L1_ERX           2  /* E-frame received */
+#define HFCUSB_L1_DTX           4  /* D-frames completed */
+
+#define MAX_BCH_SIZE        2048   /* allowed B-channel packet size */
+
+#define HFCUSB_RX_THRESHOLD 64     /* threshold for fifo report bit rx */
+#define HFCUSB_TX_THRESHOLD 64     /* threshold for fifo report bit tx */
+
+#define HFCUSB_CHIP_ID    0x16     /* Chip ID register index */
+#define HFCUSB_CIRM       0x00     /* cirm register index */
+#define HFCUSB_USB_SIZE   0x07     /* int length register */
+#define HFCUSB_USB_SIZE_I 0x06     /* iso length register */
+#define HFCUSB_F_CROSS    0x0b     /* bit order register */
+#define HFCUSB_CLKDEL     0x37     /* bit delay register */
+#define HFCUSB_CON_HDLC   0xfa     /* channel connect register */
 #define HFCUSB_HDLC_PAR   0xfb
-#define HFCUSB_SCTRL      0x31	/* S-bus control register (tx) */
-#define HFCUSB_SCTRL_E    0x32	/* same for E and special funcs */
-#define HFCUSB_SCTRL_R    0x33	/* S-bus control register (rx) */
-#define HFCUSB_F_THRES    0x0c	/* threshold register */
-#define HFCUSB_FIFO       0x0f	/* fifo select register */
-#define HFCUSB_F_USAGE    0x1a	/* fifo usage register */
+#define HFCUSB_SCTRL      0x31     /* S-bus control register (tx) */
+#define HFCUSB_SCTRL_E    0x32     /* same for E and special funcs */
+#define HFCUSB_SCTRL_R    0x33     /* S-bus control register (rx) */
+#define HFCUSB_F_THRES    0x0c     /* threshold register */
+#define HFCUSB_FIFO       0x0f     /* fifo select register */
+#define HFCUSB_F_USAGE    0x1a     /* fifo usage register */
 #define HFCUSB_MST_MODE0  0x14
 #define HFCUSB_MST_MODE1  0x15
 #define HFCUSB_P_DATA     0x1f
 #define HFCUSB_INC_RES_F  0x0e
 #define HFCUSB_STATES     0x30
 
-#define HFCUSB_CHIPID 0x40	/* ID value of HFC-USB */
+#define HFCUSB_CHIPID 0x40         /* ID value of HFC-USB */
 
 /******************/
 /* fifo registers */
 /******************/
-#define HFCUSB_NUM_FIFOS   8	/* maximum number of fifos */
-#define HFCUSB_B1_TX       0	/* index for B1 transmit bulk/int */
-#define HFCUSB_B1_RX       1	/* index for B1 receive bulk/int */
+#define HFCUSB_NUM_FIFOS   8       /* maximum number of fifos */
+#define HFCUSB_B1_TX       0       /* index for B1 transmit bulk/int */
+#define HFCUSB_B1_RX       1       /* index for B1 receive bulk/int */
 #define HFCUSB_B2_TX       2
 #define HFCUSB_B2_RX       3
 #define HFCUSB_D_TX        4
@@ -94,198 +112,162 @@
 #define HFCUSB_PCM_TX      6
 #define HFCUSB_PCM_RX      7
 
-/************/
-/* LED mask */
-/************/
-#define LED_DRIVER         0x1
-#define LED_L1             0x2
-#define LED_BCH            0x4
+/*
+* used to switch snd_transfer_mode for different TA modes e.g. the Billion USB TA just
+* supports ISO out, while the Cologne Chip EVAL TA just supports BULK out
+*/
+#define USB_INT		0
+#define USB_BULK	1
+#define USB_ISOC	2
+
+#define ISOC_PACKETS_D	8
+#define ISOC_PACKETS_B	8
+#define ISO_BUFFER_SIZE	128
+
+// ISO send definitions
+#define SINK_MAX	68
+#define SINK_MIN	48
+#define SINK_DMIN	12
+#define SINK_DMAX	18
+#define BITLINE_INF	(-64*8)
+
+
+
 
 /**********/
 /* macros */
 /**********/
-#define Write_hfc(a,b,c) usb_control_msg((a)->dev,(a)->ctrl_out_pipe,0,0x40,(c),(b),0,0,HFC_CTRL_TIMEOUT)
-#define Read_hfc(a,b,c) usb_control_msg((a)->dev,(a)->ctrl_in_pipe,1,0xC0,0,(b),(c),1,HFC_CTRL_TIMEOUT)
-
-#ifdef COMPAT_HAS_USB_IDTAB
-/****************************************/
-/* data defining the devices to be used */
-/****************************************/
-static __devinitdata const struct usb_device_id hfc_usb_idtab[3] = {
-	{USB_DEVICE(0x959, 0x2bd0)},	/* Colognechip ROM */
-	{USB_DEVICE(0x7b0, 0x0006)},	/* USB TA 128 */
-	{}			/* end with an all-zeroes entry */
-};
-#endif
+#define write_usb(a,b,c) usb_control_msg((a)->dev,(a)->ctrl_out_pipe,0,0x40,(c),(b),NULL,0,HFC_CTRL_TIMEOUT)
+#define read_usb(a,b,c) usb_control_msg((a)->dev,(a)->ctrl_in_pipe,1,0xC0,0,(b),(c),1,HFC_CTRL_TIMEOUT)
 
 /*************************************************/
 /* entry and size of output/input control buffer */
 /*************************************************/
 #define HFC_CTRL_BUFSIZE 32
-typedef struct {
+typedef struct
+{
 	__u8 hfc_reg;		/* register number */
 	__u8 reg_val;		/* value to be written (or read) */
+	int action;         /* data for action handler */
+
 } ctrl_buft;
 
+typedef struct
+{
+	int vendor;         // vendor id
+	int prod_id;	    // product id
+	char *vend_name;    // vendor string
+	__u8 led_scheme;    // led display scheme
+	__u8 led_invert;    // invert led aux port settings
+	__u8 led_bits[8];   // array of 8 possible LED bitmask settings
+
+} vendor_data;
+
 /***************************************************************/
 /* structure defining input+output fifos (interrupt/bulk mode) */
 /***************************************************************/
-struct hfcusb_data;		/* forward definition */
-typedef struct {
-	int fifonum;		/* fifo index attached to this structure */
-	__u8 fifo_mask;		/* mask for this fifo */
-	int active;		/* fifo is currently active */
+
+struct usb_fifo;			/* forward definition */
+typedef struct iso_urb_struct
+{
+	struct urb *purb;
+	__u8 buffer[ISO_BUFFER_SIZE];	/* buffer incoming/outgoing data */
+	struct usb_fifo *owner_fifo;	// pointer to owner fifo
+} iso_urb_struct;
+
+
+struct hfcusb_data;			/* forward definition */
+typedef struct usb_fifo
+{
+	int fifonum;			/* fifo index attached to this structure */
+	int active;			/* fifo is currently active */
 	struct hfcusb_data *hfc;	/* pointer to main structure */
-	int pipe;		/* address of endpoint */
-	__u8 usb_maxlen;	/* maximum length for usb transfer */
-	int max_size;		/* maximum size of receive/send packet */
-	int transmode;		/* transparent mode selected */
-	int framenum;		/* number of frame when last tx completed */
-	int rx_offset;		/* offset inside rx buffer */
-	int next_complete;	/* complete marker */
-	__u8 *act_ptr;		/* pointer to next data */
-	__u8 intervall;		/* interrupt interval */
-	struct sk_buff *buff;	/* actual used buffer */
-	urb_t urb;		/* transfer structure for usb routines */
-	__u8 buffer[128];	/* buffer incoming/outgoing data */
+	int pipe;			/* address of endpoint */
+	__u8 usb_packet_maxlen;		/* maximum length for usb transfer */
+	unsigned int max_size;		/* maximum size of receive/send packet */
+	__u8 intervall;			/* interrupt interval */
+	struct sk_buff *skbuff; 	/* actual used buffer */
+	struct urb *urb;		/* transfer structure for usb routines */
+	__u8 buffer[128];		/* buffer incoming/outgoing data */
+	int bit_line;			/* how much bits are in the fifo? */
+
+	volatile __u8 usb_transfer_mode;/* switched between ISO and INT */
+	iso_urb_struct iso[2];		/* need two urbs to have one always for pending */
+	struct hisax_if *hif;		/* hisax interface */
+	int delete_flg;			/* only delete skbuff once */
+	int last_urblen;		/* remember length of last packet */
+
 } usb_fifo;
 
+
 /*********************************************/
 /* structure holding all data for one device */
 /*********************************************/
-typedef struct hfcusb_data {
-	struct hisax_drvreg regd;	/* register data and callbacks */
-	struct usb_device *dev;	/* our device */
-	int if_used;		/* used interface number */
-	int alt_used;		/* used alternate config */
-	int ctrl_paksize;	/* control pipe packet size */
+typedef struct hfcusb_data
+{
+	// HiSax Interface for loadable Layer1 drivers
+	struct hisax_d_if d_if;			/* see hisax_if.h */
+	struct hisax_b_if b_if[2];		/* see hisax_if.h */
+	int protocol;
+	
+	struct usb_device *dev;			/* our device */
+	int if_used;				/* used interface number */
+	int alt_used;				/* used alternate config */
+	int ctrl_paksize;			/* control pipe packet size */
 	int ctrl_in_pipe, ctrl_out_pipe;	/* handles for control pipe */
+	int cfg_used;				/* configuration index used */
+	int vend_idx;				// vendor found
+
+	int b_mode[2];				// B-channel mode
+
+	int l1_activated;			// layer 1 activated
+
+	int packet_size,iso_packet_size;	
 
 	/* control pipe background handling */
 	ctrl_buft ctrl_buff[HFC_CTRL_BUFSIZE];	/* buffer holding queued data */
-	volatile int ctrl_in_idx, ctrl_out_idx, ctrl_cnt;	/* input/output pointer + count */
-	urb_t ctrl_urb;		/* transfer structure for control channel */
-	devrequest ctrl_write;	/* buffer for control write request */
-	devrequest ctrl_read;	/* same for read request */
-
-	volatile __u8 dfifo_fill;	/* value read from tx d-fifo */
-	volatile __u8 active_fifos;	/* fifos currently active as bit mask */
-	volatile __u8 threshold_mask;	/* threshold actually reported */
-	volatile __u8 service_request;	/* fifo needs service from task */
-	volatile __u8 ctrl_fifo;	/* last selected fifo */
-	volatile __u8 bch_enables;	/* or mask for sctrl_r and sctrl register values */
-        volatile __u8 led_req;          /* request status of adapters leds */ 
-        volatile __u8 led_act;          /* active status of adapters leds */ 
+	volatile int ctrl_in_idx, ctrl_out_idx,
+		ctrl_cnt;			/* input/output pointer + count */
+	struct urb *ctrl_urb;			/* transfer structure for control channel */
+
+	struct usb_ctrlrequest ctrl_write;	/* buffer for control write request */
+	struct usb_ctrlrequest ctrl_read;	/* same for read request */
+
+	__u8 led_state,led_new_data,led_b_active;
+
+	volatile __u8 threshold_mask;		/* threshold actually reported */
+	volatile __u8 bch_enables;		/* or mask for sctrl_r and sctrl register values */
+
 	usb_fifo fifos[HFCUSB_NUM_FIFOS];	/* structure holding all fifo data */
 
-	/* layer 1 activation/deactivation handling */
-	volatile __u8 l1_state;	/* actual l1 state */
-	volatile ulong l1_event;	/* event mask */
-	struct tq_struct l1_tq;	/* l1 bh structure */
-	struct timer_list t3_timer;	/* timer for activation/deactivation */
-	struct timer_list t4_timer;	/* timer for activation/deactivation */
+	volatile __u8 l1_state;			/* actual l1 state */
+	struct timer_list t3_timer;		/* timer 3 for activation/deactivation */
+	struct timer_list t4_timer;		/* timer 4 for activation/deactivation */
+	struct timer_list led_timer;		/* timer flashing leds */
+
 } hfcusb_data;
 
-#if 0
-static void
-usb_dump_urb(purb_t purb)
-{
-	printk("urb                   :%p\n", purb);
-	printk("next                  :%p\n", purb->next);
-	printk("dev                   :%p\n", purb->dev);
-	printk("pipe                  :%08X\n", purb->pipe);
-	printk("status                :%d\n", purb->status);
-	printk("transfer_flags        :%08X\n", purb->transfer_flags);
-	printk("transfer_buffer       :%p\n", purb->transfer_buffer);
-	printk("transfer_buffer_length:%d\n",
-	       purb->transfer_buffer_length);
-	printk("actual_length         :%d\n", purb->actual_length);
-	printk("setup_packet          :%p\n", purb->setup_packet);
-	printk("start_frame           :%d\n", purb->start_frame);
-	printk("number_of_packets     :%d\n", purb->number_of_packets);
-	printk("interval              :%d\n", purb->interval);
-	printk("error_count           :%d\n", purb->error_count);
-	printk("context               :%p\n", purb->context);
-	printk("complete              :%p\n", purb->complete);
-}
-#endif
 
-/*************************************************************************/
-/* bottom half handler for L1 activation/deactiavtaion + D-chan + E-chan */
-/*************************************************************************/
-static void
-usb_l1d_bh(hfcusb_data * hfc)
-{
+static void collect_rx_frame(usb_fifo *fifo,__u8 *data,int len,int finish);
+
 
-	while (hfc->l1_event) {
-		if (test_and_clear_bit
-		    (HFCUSB_L1_STATECHANGE, &hfc->l1_event)) {
-			if (hfc->l1_state == 7)
-			    hfc->led_req |= LED_L1;
-			else
-			    hfc->led_req &= ~LED_L1;
-			if ((hfc->l1_state == 7) ||
-			    (hfc->l1_state == 3))
-			    hfc->regd.dch_l1l2(hfc->regd.arg_hisax,
-					       (hfc->l1_state ==
-						7) ? (PH_ACTIVATE |
-						      INDICATION)
-					       : (PH_DEACTIVATE | INDICATION),
-					       NULL);
-		}
-		if (test_and_clear_bit(HFCUSB_L1_DRX, &hfc->l1_event)) {
-			hfc->regd.dch_l1l2(hfc->regd.arg_hisax,
-					   PH_DATA | INDICATION,
-					   (void *) 0);
-		}
-		if (test_and_clear_bit(HFCUSB_L1_ERX, &hfc->l1_event)) {
-			hfc->regd.dch_l1l2(hfc->regd.arg_hisax,
-					   PH_DATA | INDICATION,
-					   (void *) 1);
-		}
-		if (test_and_clear_bit(HFCUSB_L1_DTX, &hfc->l1_event)) {
-			hfc->regd.dch_l1l2(hfc->regd.arg_hisax,
-					   PH_DATA | CONFIRM, NULL);
-		}
-	}			/* while */
-}				/* usb_l1d_bh */
 
 /******************************************************/
 /* start next background transfer for control channel */
 /******************************************************/
-static void
-ctrl_start_transfer(hfcusb_data * hfc)
+static void ctrl_start_transfer(hfcusb_data * hfc)
 {
-
-	if (hfc->ctrl_cnt) {
-		switch (hfc->ctrl_buff[hfc->ctrl_out_idx].hfc_reg) {
-			case HFCUSB_F_USAGE:
-				hfc->ctrl_urb.pipe = hfc->ctrl_in_pipe;
-				hfc->ctrl_urb.setup_packet =
-				    (u_char *) & hfc->ctrl_read;
-				hfc->ctrl_urb.transfer_buffer_length = 1;
-				hfc->ctrl_read.index =
-				    hfc->ctrl_buff[hfc->ctrl_out_idx].
-				    hfc_reg;
-				hfc->ctrl_urb.transfer_buffer =
-				    (char *) &hfc->dfifo_fill;
-				break;
-
-			default:	/* write register */
-				hfc->ctrl_urb.pipe = hfc->ctrl_out_pipe;
-				hfc->ctrl_urb.setup_packet =
-				    (u_char *) & hfc->ctrl_write;
-				hfc->ctrl_urb.transfer_buffer = NULL;
-				hfc->ctrl_urb.transfer_buffer_length = 0;
-				hfc->ctrl_write.index =
-				    hfc->ctrl_buff[hfc->ctrl_out_idx].
-				    hfc_reg;
-				hfc->ctrl_write.value =
-				    hfc->ctrl_buff[hfc->ctrl_out_idx].
-				    reg_val;
-				break;
-		}
-		usb_submit_urb(&hfc->ctrl_urb);	/* start transfer */
+	int err;
+	if(hfc->ctrl_cnt)
+	{
+		hfc->ctrl_urb->pipe = hfc->ctrl_out_pipe;
+		hfc->ctrl_urb->setup_packet = (u_char *) & hfc->ctrl_write;
+		hfc->ctrl_urb->transfer_buffer = NULL;
+		hfc->ctrl_urb->transfer_buffer_length = 0;
+		hfc->ctrl_write.wIndex = hfc->ctrl_buff[hfc->ctrl_out_idx].hfc_reg;
+		hfc->ctrl_write.wValue = hfc->ctrl_buff[hfc->ctrl_out_idx].reg_val;
+		err = usb_submit_urb(hfc->ctrl_urb);	/* start transfer */
+		printk(KERN_DEBUG "ctrl_start_transfer: submit %d\n", err);
 	}
 }				/* ctrl_start_transfer */
 
@@ -293,897 +275,1418 @@ ctrl_start_transfer(hfcusb_data * hfc)
 /* queue a control transfer request */
 /* return 0 on success.             */
 /************************************/
-static int
-queue_control_request(hfcusb_data * hfc, __u8 reg, __u8 val)
+static int queue_control_request(hfcusb_data * hfc, __u8 reg, __u8 val,int action)
 {
 	ctrl_buft *buf;
 
-	if (hfc->ctrl_cnt >= HFC_CTRL_BUFSIZE)
-		return (1);	/* no space left */
-	buf = hfc->ctrl_buff + hfc->ctrl_in_idx;	/* pointer to new index */
+#ifdef VERBOSE_USB_DEBUG
+	printk ("HFC_USB: queue_control_request reg: %x, val: %x\n", reg, val);
+#endif
+
+	if(hfc->ctrl_cnt >= HFC_CTRL_BUFSIZE)  return(1);	   /* no space left */
+	buf = &hfc->ctrl_buff[hfc->ctrl_in_idx];	/* pointer to new index */
 	buf->hfc_reg = reg;
 	buf->reg_val = val;
+	buf->action=action;
 	if (++hfc->ctrl_in_idx >= HFC_CTRL_BUFSIZE)
 		hfc->ctrl_in_idx = 0;	/* pointer wrap */
 	if (++hfc->ctrl_cnt == 1)
 		ctrl_start_transfer(hfc);
-	return (0);
-}				/* queue_control_request */
+	return(0);
+}		/* queue_control_request */
 
-/**************************************/
-/* called when timer t3 or t4 expires */
-/**************************************/
-static void
-l1_timer_expire(hfcusb_data * hfc)
-{
-    if (timer_pending(&hfc->t4_timer))
-	del_timer(&hfc->t4_timer);
-    queue_control_request(hfc, HFCUSB_STATES, 0x40);
-    test_and_set_bit(HFCUSB_L1_STATECHANGE,
-		     &hfc->l1_event);
-    queue_task(&hfc->l1_tq, &tq_immediate);
-    mark_bh(IMMEDIATE_BH);
-} /* l1_timer_expire */
-
-/**************************************************/
-/* (re)fills a tx-fifo urb. Queuing is done later */
-/**************************************************/
-static void
-fill_tx_urb(usb_fifo * fifo)
-{
-	struct sk_buff *skb;
-	long flags;
-	int i, ii = 0;
-
-	fifo->urb.dev = fifo->hfc->dev;
-	if ((fifo->buff)
-	    && (fifo->urb.transfer_buffer_length < fifo->usb_maxlen)) {
-		switch (fifo->fifonum) {
-			case HFCUSB_B1_TX:
-			case HFCUSB_B2_TX:
-				skb = fifo->buff;
-				fifo->buff = NULL;
-				fifo->hfc->regd.bch_l1l2(fifo->hfc->regd.
-							 arg_hisax,
-							 (fifo->fifonum ==
-							  HFCUSB_B1_TX) ? 0
-							 : 1,
-							 (PH_DATA |
-							  CONFIRM),
-							 (void *) skb);
-				fifo->hfc->service_request |=
-				    fifo->fifo_mask;
-				return;
-			case HFCUSB_D_TX:
-				dev_kfree_skb_any(fifo->buff);
-				fifo->buff = NULL;
-				save_flags(flags);
-				cli();
-				fifo->hfc->dfifo_fill = 0xff;	/* currently invalid data */
-				queue_control_request(fifo->hfc,
-						      HFCUSB_FIFO,
-						      HFCUSB_D_TX);
-				queue_control_request(fifo->hfc,
-						      HFCUSB_F_USAGE, 0);
-				restore_flags(flags);
-				return;
-			default:
-				return;	/* error, invalid fifo */
-		}
+
+static int control_action_handler(hfcusb_data *hfc,int reg,int val,int action)
+{
+	if(!action) return(1);  // no action defined
+
+	return(0);
+}
+
+
+/***************************************************************/
+/* control completion routine handling background control cmds */
+/***************************************************************/
+static void ctrl_complete(struct urb *urb)
+{
+	hfcusb_data *hfc = (hfcusb_data *) urb->context;
+	ctrl_buft *buf;
+
+	printk(KERN_DEBUG "ctrl_complete cnt %d\n", hfc->ctrl_cnt);
+	urb->dev = hfc->dev;
+	if(hfc->ctrl_cnt)
+	{
+		buf=&hfc->ctrl_buff[hfc->ctrl_out_idx];
+		control_action_handler(hfc,buf->hfc_reg,buf->reg_val,buf->action);
+
+		hfc->ctrl_cnt--;	/* decrement actual count */
+		if(++hfc->ctrl_out_idx >= HFC_CTRL_BUFSIZE) hfc->ctrl_out_idx = 0;	/* pointer wrap */
+
+		ctrl_start_transfer(hfc);	/* start next transfer */
+	}
+}				/* ctrl_complete */
+
+
+
+#define LED_OFF      0   // no LED support
+#define LED_SCHEME1  1	 // LED standard scheme
+#define LED_SCHEME2  2	 // not used yet...
+
+#define LED_POWER_ON	1
+#define LED_POWER_OFF	2
+#define LED_S0_ON		3
+#define LED_S0_OFF		4
+#define LED_B1_ON		5
+#define LED_B1_OFF		6
+#define LED_B1_DATA		7
+#define LED_B2_ON		8
+#define LED_B2_OFF		9
+#define LED_B2_DATA	   10
+
+#define LED_NORMAL   0	 // LEDs are normal
+#define LED_INVERTED 1   // LEDs are inverted
+
+// time for LED flashing
+#define LED_TIME      250
+
+vendor_data vdata[]=
+{
+    {0x959, 0x2bd0, "ISDN USB TA (Cologne Chip HFC-S USB based)", LED_OFF,LED_NORMAL,{4,0,2,1}},     /* CologneChip Eval TA */
+	{0x7b0, 0x0007, "Billion tiny USB ISDN TA 128", LED_SCHEME1,  LED_INVERTED, {8,0x40,0x20,0x10}},  /* Billion TA */
+	{0x742, 0x2008, "Stollmann USB TA",             LED_SCHEME1,  LED_NORMAL,   {4,0,2,1}},           /* Stollmann TA */
+	{0x8e3, 0x0301, "Olitec USB RNIS",              LED_SCHEME1,  LED_NORMAL,   {2,0,1,4}},           /* Olitec TA  */
+	{0x675, 0x1688, "DrayTec USB ISDN TA",          LED_SCHEME1,  LED_NORMAL,   {4,0,2,1}},           /* Draytec TA */
+	{0x7fa, 0x0846, "Bewan Modem RNIS USB",         LED_SCHEME1,  LED_INVERTED, {8,0x40,0x20,0x10}},  /* Bewan TA   */
+	{0}			   // EOL element
+};
+										
+/***************************************************/
+/* write led data to auxport & invert if necessary */
+/***************************************************/
+static void write_led(hfcusb_data * hfc,__u8 led_state)
+{
+	if(led_state!=hfc->led_state)
+	{
+		hfc->led_state=led_state;
+		queue_control_request(hfc, HFCUSB_P_DATA,(vdata[hfc->vend_idx].led_invert) ? ~led_state : led_state,1);
+	}
+}
+
+/******************************************/
+/* invert B-channel LEDs if data is sent  */
+/******************************************/
+static void led_timer(hfcusb_data * hfc)
+{
+   	static int cnt=0;
+	__u8 led_state=hfc->led_state;
+
+	if(cnt)
+	{
+		if(hfc->led_b_active&1) led_state|=vdata[hfc->vend_idx].led_bits[2];
+		if(hfc->led_b_active&2) led_state|=vdata[hfc->vend_idx].led_bits[3];
+	}
+	else
+	{
+		if(!(hfc->led_b_active&1) || hfc->led_new_data&1) led_state&=~vdata[hfc->vend_idx].led_bits[2];
+		if(!(hfc->led_b_active&2) || hfc->led_new_data&2) led_state&=~vdata[hfc->vend_idx].led_bits[3];
 	}
 
-	/* check if new buffer needed */
-	if (!fifo->buff) {
-		switch (fifo->fifonum) {
-			case HFCUSB_B1_TX:
-				if (fifo->hfc->regd.bsk[0])
-					fifo->buff = *fifo->hfc->regd.bsk[0];	/* B1-channel tx buffer */
+	write_led(hfc,led_state);
+	hfc->led_new_data=0;
+
+	cnt=!cnt;
+	// restart 4 hz timer
+	hfc->led_timer.expires = jiffies + (LED_TIME * HZ) / 1000;
+	if(!timer_pending(&hfc->led_timer)) add_timer(&hfc->led_timer);
+}
+
+/**************************/
+/* handle LED requests    */
+/**************************/
+static void handle_led(hfcusb_data * hfc,int event)
+{
+	__u8 led_state=hfc->led_state;
+
+	// if no scheme -> no LED action
+   	if(vdata[hfc->vend_idx].led_scheme==LED_OFF) return;
+
+	switch(event)
+	{
+		case LED_POWER_ON:
+				   led_state|=vdata[hfc->vend_idx].led_bits[0];
+				break;
+		case LED_POWER_OFF: // no Power off handling
+				break;
+		case LED_S0_ON:
+				   led_state|=vdata[hfc->vend_idx].led_bits[1];
+				break;
+		case LED_S0_OFF:
+				   led_state&=~vdata[hfc->vend_idx].led_bits[1];
 				break;
-			case HFCUSB_B2_TX:
-				if (fifo->hfc->regd.bsk[1])
-					fifo->buff = *fifo->hfc->regd.bsk[1];	/* B2-channel tx buffer */
+		case LED_B1_ON:
+					hfc->led_b_active|=1;
 				break;
-			case HFCUSB_D_TX:
-				if (fifo->hfc->regd.dsq)
-					fifo->buff = skb_dequeue(fifo->hfc->regd.dsq);	/* D-channel tx queue */
+		case LED_B1_OFF:
+					hfc->led_b_active&=~1;
 				break;
-			default:
-				return;	/* error, invalid fifo */
+		case LED_B1_DATA:
+				   hfc->led_new_data|=1;
+				break;
+		case LED_B2_ON:
+				   hfc->led_b_active|=2;
+				break;
+		case LED_B2_OFF:
+					hfc->led_b_active&=~2;
+				break;
+		case LED_B2_DATA:
+				   hfc->led_new_data|=2;
+				break;
+	}
+	
+	write_led(hfc,led_state);
+}
+
+/********************************/
+/* called when timer t3 expires */
+/********************************/
+static void l1_timer_expire_t3(hfcusb_data * hfc)
+{
+    //printk (KERN_INFO "HFC-USB: l1_timer_expire_t3\n");
+
+	hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,PH_DEACTIVATE | INDICATION,NULL);
+#ifdef VERBOSE_USB_DEBUG
+	printk(KERN_INFO "PH_DEACTIVATE | INDICATION sent\n");
+#endif
+	hfc->l1_activated=FALSE;
+	handle_led(hfc,LED_S0_OFF);
+}
+
+/********************************/
+/* called when timer t4 expires */
+/********************************/
+static void l1_timer_expire_t4(hfcusb_data * hfc)
+{
+    //printk (KERN_INFO "HFC-USB: l1_timer_expire_t4\n");
+
+	hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,PH_DEACTIVATE | INDICATION,NULL);
+#ifdef VERBOSE_USB_DEBUG
+	printk(KERN_INFO "PH_DEACTIVATE | INDICATION sent\n");
+#endif
+	hfc->l1_activated=FALSE;
+	handle_led(hfc,LED_S0_OFF);
+}
+
+/*****************************/
+/* handle S0 state changes   */
+/*****************************/
+static void state_handler(hfcusb_data * hfc,__u8 state)
+{
+	__u8 old_state;
+
+	old_state=hfc->l1_state;
+
+	// range check
+	if(state==old_state || state<1 || state>8) return;
+
+#ifdef VERBOSE_ISDN_DEBUG
+	printk(KERN_INFO "HFC-USB: new S0 state:%d old_state:%d\n",state,old_state);
+#endif
+
+	if(state<4 || state==7 || state==8)
+	{
+        if(timer_pending(&hfc->t3_timer)) del_timer(&hfc->t3_timer);
+		//printk(KERN_INFO "HFC-USB: T3 deactivated\n");
+	}
+
+	if(state>=7)
+	{
+        if(timer_pending(&hfc->t4_timer)) del_timer(&hfc->t4_timer);
+		//printk(KERN_INFO "HFC-USB: T4 deactivated\n");
+	}
+
+	if(state==7 && !hfc->l1_activated)
+	{
+		hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,PH_ACTIVATE | INDICATION,NULL);
+		//printk(KERN_INFO "HFC-USB: PH_ACTIVATE | INDICATION sent\n");
+		hfc->l1_activated=TRUE;
+		handle_led(hfc,LED_S0_ON);
+	}
+	else
+	if(state<=3 /* && activated*/)
+	{
+		if(old_state==7 || old_state==8)
+		{
+			//printk(KERN_INFO "HFC-USB: T4 activated\n");
+			hfc->t4_timer.expires = jiffies + (HFC_TIMER_T4 * HZ) / 1000;
+			if(!timer_pending(&hfc->t4_timer)) add_timer(&hfc->t4_timer);
 		}
-		if (!fifo->buff) {
-			fifo->active = 0;	/* we are inactive now */
-			fifo->hfc->active_fifos &= ~fifo->fifo_mask;
-			if (fifo->fifonum == HFCUSB_D_TX) {
-				test_and_set_bit(HFCUSB_L1_DTX,
-						 &fifo->hfc->l1_event);
-				queue_task(&fifo->hfc->l1_tq,
-					   &tq_immediate);
-				mark_bh(IMMEDIATE_BH);
-			}
-			return;
+		else
+		{
+			hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,PH_DEACTIVATE | INDICATION,NULL);
+			//printk(KERN_INFO "HFC-USB: PH_DEACTIVATE | INDICATION sent\n");
+			hfc->l1_activated=FALSE;
+			handle_led(hfc,LED_S0_OFF);
 		}
-		fifo->act_ptr = fifo->buff->data;	/* start of data */
-		fifo->active = 1;
-		ii = 1;
-		fifo->hfc->active_fifos |= fifo->fifo_mask;
-		fifo->hfc->service_request &= ~fifo->fifo_mask;
-	}
-	/* fillup the send buffer */
-	i = fifo->buff->len - (fifo->act_ptr - fifo->buff->data);	/* remaining length */
-	fifo->buffer[0] = !fifo->transmode;	/* not eof */
-	if (i > (fifo->usb_maxlen - ii)) {
-		i = fifo->usb_maxlen - ii;
-	}
-	if (i)
-		memcpy(fifo->buffer + ii, fifo->act_ptr, i);
-	fifo->urb.transfer_buffer_length = i + ii;
-        fifo->rx_offset = ii;
-}				/* fill_tx_urb */
-
-/************************************************/
-/* transmit completion routine for all tx fifos */
-/************************************************/
-static void
-tx_complete(purb_t urb)
+	}
+
+	hfc->l1_state=state;
+}
+
+
+/* prepare iso urb */
+static void fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe, void *buf,
+	int num_packets, int packet_size, int interval, usb_complete_t complete, void *context)
 {
-	usb_fifo *fifo = (usb_fifo *) urb->context;	/* pointer to our fifo */
+	int k;
 
-	fifo->hfc->service_request &= ~fifo->fifo_mask;	/* no further handling */
-	fifo->framenum = usb_get_current_frame_number(fifo->hfc->dev);
+	spin_lock_init(&urb->lock);	// do we really need spin_lock_init ?
+	urb->dev = dev;
+	urb->pipe = pipe;
+	urb->complete = complete;
+	urb->number_of_packets = num_packets;
+	urb->transfer_buffer_length = packet_size * num_packets;
+	urb->context = context;
+	urb->transfer_buffer = buf;
+	urb->transfer_flags = 0;
+	urb->transfer_flags = USB_ISO_ASAP;
+	urb->actual_length = 0;
+	urb->interval = interval;
+	for (k = 0; k < num_packets; k++) {
+		urb->iso_frame_desc[k].offset = packet_size * k;
+		urb->iso_frame_desc[k].length = packet_size;
+		urb->iso_frame_desc[k].actual_length = 0;
+	}
+}
 
-	/* check for deactivation or error */
-	if ((!fifo->active) || (urb->status)) {
-		fifo->hfc->active_fifos &= ~fifo->fifo_mask;	/* we are inactive */
-		fifo->active = 0;
-		if ((fifo->buff) && (fifo->fifonum == HFCUSB_D_TX)) {
-			dev_kfree_skb_any(fifo->buff);
+/* allocs urbs and start isoc transfer with two pending urbs to avoid gaps in the transfer chain */
+static int start_isoc_chain(usb_fifo * fifo, int num_packets_per_urb,usb_complete_t complete,int packet_size)
+{
+	int i, k, errcode;
+
+#ifdef VERBOSE_USB_DEBUG
+	printk(KERN_INFO "HFC-USB: starting ISO-chain for Fifo %i\n",  fifo->fifonum);
+#endif
+
+
+	// allocate Memory for Iso out Urbs
+	for (i = 0; i < 2; i++) {
+		if (!(fifo->iso[i].purb)) {
+			fifo->iso[i].purb = usb_alloc_urb(num_packets_per_urb);
+			fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
+
+			// Init the first iso
+			if (ISO_BUFFER_SIZE >= (fifo->usb_packet_maxlen * num_packets_per_urb))
+			{
+
+				fill_isoc_urb(fifo->iso[i].purb, fifo->hfc->dev, fifo->pipe, fifo->iso[i].buffer,
+					num_packets_per_urb, fifo->usb_packet_maxlen, fifo->intervall,
+					complete, &fifo->iso[i]);
+
+				memset(fifo->iso[i].buffer, 0, sizeof(fifo->iso[i].buffer));
+
+				// defining packet delimeters in fifo->buffer
+				for(k = 0; k < num_packets_per_urb; k++)
+				{
+					fifo->iso[i].purb->iso_frame_desc[k].offset = k*packet_size;
+					fifo->iso[i].purb->iso_frame_desc[k].length = packet_size;
+				}
+			}
 		}
-		fifo->buff = NULL;
-		return;
+
+		fifo->bit_line = BITLINE_INF;
+
+		errcode = usb_submit_urb(fifo->iso[i].purb);
+		fifo->active = (errcode >= 0) ? 1 : 0;
+		if(errcode < 0)
+		{
+			printk(KERN_INFO "HFC-USB: error submitting ISO URB: %i.%i \n",  errcode, i);
+		};
+
 	}
-	fifo->act_ptr += (urb->transfer_buffer_length - fifo->rx_offset);	/* adjust pointer */
-	fill_tx_urb(fifo);	/* refill the urb */
-	fifo->hfc->threshold_mask |= fifo->fifo_mask;	/* assume threshold reached */
-	if (fifo->buff)
-		fifo->hfc->service_request |= fifo->fifo_mask;	/* need to restart */
-}				/* tx_complete */
 
-/***********************************************/
-/* receive completion routine for all rx fifos */
-/***********************************************/
-static void
-rx_complete(purb_t urb)
+	// errcode = (usb_submit_urb(fifo->iso[0].purb, GFP_KERNEL));
+	return(fifo->active);
+}
+
+/* stops running iso chain and frees their pending urbs */
+static void stop_isoc_chain(usb_fifo * fifo)
 {
-	usb_fifo *fifo = (usb_fifo *) urb->context;	/* pointer to our fifo */
-	hfcusb_data *hfc = fifo->hfc;
-	usb_fifo *txfifo;
-	__u8 last_state;
-	int i, ii, currcnt, hdlci;
-	struct sk_buff *skb;
-
-	urb->dev = hfc->dev; /* security init */
-	if ((!fifo->active) || (urb->status)) {
-		hfc->service_request &= ~fifo->fifo_mask;	/* no further handling */
-		hfc->active_fifos &= ~fifo->fifo_mask;	/* we are inactive */
-		fifo->urb.interval = 0;	/* cancel automatic rescheduling */
-		if (fifo->buff) {
-			dev_kfree_skb_any(fifo->buff);
-			fifo->buff = NULL;
+	int i;
+
+	for(i = 0; i < 2; i++)
+	{
+		if(fifo->iso[i].purb)
+		{
+#ifdef VERBOSE_USB_DEBUG
+			printk(KERN_INFO "HFC-USB: Stopping iso chain for fifo %i.%i\n", fifo->fifonum, i);
+#endif
+			usb_unlink_urb(fifo->iso[i].purb);
+			usb_free_urb(fifo->iso[i].purb);
+			fifo->iso[i].purb = NULL;
 		}
-		return;
 	}
+	if (fifo->urb) {
+		usb_unlink_urb(fifo->urb);
+		usb_free_urb(fifo->urb);
+		fifo->urb = NULL;
+	}
+	fifo->active = 0;
+}
 
-	/* first check for any status changes */
-	if ((urb->actual_length < fifo->rx_offset)
-	    || (urb->actual_length > fifo->usb_maxlen))
-		return;		/* error condition */
-
-	if (fifo->rx_offset) {
-		hfc->threshold_mask = fifo->buffer[1];	/* update threshold status */
-		fifo->next_complete = fifo->buffer[0] & 1;
-		if ((fifo->fifonum == HFCUSB_D_RX) &&
-		    (hfc->led_req != hfc->led_act))
-		    queue_control_request(hfc, HFCUSB_P_DATA, hfc->led_req);
-
-		/* check if rescheduling needed */
-		if ((i =
-		     hfc->service_request & hfc->active_fifos & ~hfc->
-		     threshold_mask)) {
-			currcnt =
-			    usb_get_current_frame_number(hfc->dev);
-			txfifo = hfc->fifos + HFCUSB_B1_TX;
-			ii = 3;
-			while (ii--) {
-				if ((i & txfifo->fifo_mask)
-				    && (currcnt != txfifo->framenum)) {
-					hfc->service_request &=
-					    ~txfifo->fifo_mask;
-					if (!txfifo->buff)
-						fill_tx_urb(txfifo);
-					if (txfifo->buff)
-						usb_submit_urb(&txfifo->
-							       urb);
+// defines how much ISO packets are handled in one URB
+static int iso_packets[8]={ISOC_PACKETS_B,ISOC_PACKETS_B,ISOC_PACKETS_B,ISOC_PACKETS_B,
+	                       ISOC_PACKETS_D,ISOC_PACKETS_D,ISOC_PACKETS_D,ISOC_PACKETS_D};
+
+/*****************************************************/
+/* transmit completion routine for all ISO tx fifos */
+/*****************************************************/
+static void tx_iso_complete(struct urb *urb)
+{
+	iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
+	usb_fifo *fifo = context_iso_urb->owner_fifo;
+	hfcusb_data *hfc = fifo->hfc;
+	int k, tx_offset, num_isoc_packets, sink, len, current_len,errcode,frame_complete,transp_mode,fifon;
+	__u8 threshbit;
+	__u8 threshtable[8] = { 1, 2, 4, 8, 0x10, 0x20, 0x40, 0x80};
+
+	fifon=fifo->fifonum;
+	tx_offset=0;
+	// very weird error code when using ohci drivers, for now : ignore this error ...  (MB)
+	if(urb->status == -EOVERFLOW)
+	{
+		urb->status = 0;
+#ifdef VERBOSE_USB_DEBUG
+		printk(KERN_INFO "HFC-USB: ignoring USB DATAOVERRUN  for fifo  %i \n",fifon);
+#endif
+	}
+
+	if(fifo->active && !urb->status)
+	{
+		transp_mode=0;
+		if(fifon<4 && hfc->b_mode[fifon/2]==L1_MODE_TRANS) transp_mode=TRUE;
+
+		threshbit = threshtable[fifon] & hfc->threshold_mask;	// is threshold set for our channel?
+		num_isoc_packets=iso_packets[fifon];
+
+		if(fifon >= HFCUSB_D_TX)
+		{
+			sink = (threshbit) ? SINK_DMIN : SINK_DMAX;	// how much bit go to the sink for D-channel?
+		}
+		else
+		{
+			sink = (threshbit) ? SINK_MIN : SINK_MAX;	// how much bit go to the sink for B-channel?
+		}
+
+		// prepare ISO Urb
+		fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,context_iso_urb->buffer, num_isoc_packets,
+			fifo->usb_packet_maxlen, fifo->intervall, tx_iso_complete, urb->context);
+		memset(context_iso_urb->buffer, 0, sizeof(context_iso_urb->buffer));
+
+		frame_complete=FALSE;
+
+		// Generate Iso Packets
+		for(k = 0; k < num_isoc_packets; ++k)
+		{
+			if(fifo->skbuff)
+			{
+				len = fifo->skbuff->len;	// remaining length
+
+				fifo->bit_line -= sink;	// we lower data margin every msec
+				current_len = (0 - fifo->bit_line) / 8;
+				if(current_len > 14) current_len = 14;	// maximum 15 byte for every ISO packet makes our life easier
+				current_len = (len <= current_len) ? len : current_len;
+				fifo->bit_line += current_len * 8;	// how much bit do we put on the line?
+
+				context_iso_urb->buffer[tx_offset] = 0;
+				if(current_len == len)
+				{
+					if(!transp_mode)
+					{
+						context_iso_urb->buffer[tx_offset] = 1;	// here frame completion
+						fifo->bit_line += 32;	// add 2 byte flags and 16bit CRC at end of ISDN frame
+					}
+					frame_complete = TRUE;
+				}
+
+				// copy bytes from buffer into ISO_URB
+				memcpy(context_iso_urb->buffer+tx_offset+1,fifo->skbuff->data,current_len);
+				skb_pull(fifo->skbuff,current_len);
+
+				// define packet delimeters within the URB buffer
+				urb->iso_frame_desc[k].offset = tx_offset;
+				urb->iso_frame_desc[k].length = current_len + 1;
+
+				tx_offset += (current_len + 1);
+				// printk(KERN_INFO "HFC-USB: fifonum:%d,%d bytes to send, %d bytes ISO packet,bitline:%d,sink:%d,threshbit:%d,threshmask:%x\n",fifon,len,current_len,fifo->bit_line,sink,threshbit,hfc->threshold_mask);
+				if(!transp_mode)
+				{
+					if(fifon==HFCUSB_B1_TX) handle_led(hfc,LED_B1_DATA);
+					if(fifon==HFCUSB_B2_TX) handle_led(hfc,LED_B2_DATA);
+				}
+			}
+			else
+			{
+				// we have no more data - generate 1 byte ISO packets
+				urb->iso_frame_desc[k].offset = tx_offset++;
+
+				urb->iso_frame_desc[k].length = 1;
+				fifo->bit_line -= sink;	// we lower data margin every msec
+
+				if(fifo->bit_line < BITLINE_INF)
+				{
+					fifo->bit_line = BITLINE_INF;
+					//printk (KERN_INFO "HFC-USB: BITLINE_INF underrun\n");
 				}
-				txfifo += 2;
 			}
-		}
 
-		/* handle l1 events */
-		if ((fifo->buffer[0] >> 4) != hfc->l1_state) {
-			last_state = hfc->l1_state;
-			hfc->l1_state = fifo->buffer[0] >> 4;	/* update status */
-			if (timer_pending(&hfc->t4_timer))
-			    del_timer(&hfc->t4_timer);
-			if (((hfc->l1_state == 3) && 
-			     ((last_state == 7) || 
-			      (last_state == 8))) || 
-			    ((timer_pending(&hfc->t3_timer) &&
-			    (hfc->l1_state == 8)))) {
-			    hfc->t4_timer.expires = jiffies + 2;
-			    add_timer(&hfc->t4_timer);
-			} else { 
-				if (timer_pending(&hfc->t3_timer)
-				    && (hfc->l1_state == 7))
-					del_timer(&hfc->t3_timer);	/* no longer needed */
-				test_and_set_bit(HFCUSB_L1_STATECHANGE,
-						 &hfc->l1_event);
-				queue_task(&hfc->l1_tq, &tq_immediate);
-				mark_bh(IMMEDIATE_BH);
+			if(frame_complete)
+			{
+				// delete the buffer only once, here or in hfc_usb_l2l1() in a PH_DATA|REQUEST
+				fifo->delete_flg=TRUE;
+
+				fifo->hif->l1l2(fifo->hif,PH_DATA|CONFIRM,(void*)fifo->skbuff->truesize);
+
+				if(fifo->skbuff && fifo->delete_flg)
+				{
+					dev_kfree_skb_any(fifo->skbuff);
+					//printk(KERN_INFO "HFC-USB: skbuff=NULL on fifo:%d\n",fifo->fifonum);
+					fifo->skbuff = NULL;
+					fifo->delete_flg=FALSE;
+				}
+
+				frame_complete=FALSE;
 			}
+        }
+
+		errcode = usb_submit_urb(urb);
+		if(errcode < 0)
+		{
+			printk(KERN_INFO "HFC-USB: error submitting ISO URB: %i \n",  errcode);
+		}
+	}
+	else
+	{
+		if(urb->status)
+		{
+			printk(KERN_INFO "HFC-USB: tx_iso_complete : urb->status %i, fifonum %i\n",  urb->status,fifon);
 		}
 	}
 
-	/* check the length for data and move if present */
-	if (fifo->next_complete || (urb->actual_length > fifo->rx_offset)) {
-		i = fifo->buff->len + urb->actual_length - fifo->rx_offset;	/* new total length */
-		hdlci = (fifo->transmode) ? 0 : 3;
-		if (i <= (fifo->max_size + hdlci)) {
-			memcpy(fifo->act_ptr,
-			       fifo->buffer + fifo->rx_offset,
-			       urb->actual_length - fifo->rx_offset);
-			fifo->act_ptr +=
-			    (urb->actual_length - fifo->rx_offset);
-			fifo->buff->len +=
-			    (urb->actual_length - fifo->rx_offset);
-		} else
-			fifo->buff->len = fifo->max_size + 4;	/* mark frame as to long */
-		if (fifo->next_complete && (urb->actual_length < fifo->usb_maxlen)) {
-		    /* the frame is complete */
-		    fifo->next_complete = 0;
-		    if (((!*(fifo->act_ptr - 1)) || fifo->transmode) &&
-			(fifo->buff->len >= (hdlci + 1))
-			&& (fifo->buff->len <=
-			    (fifo->max_size + hdlci)) &&
-			((skb = dev_alloc_skb(fifo->max_size + hdlci)) != NULL)) {
-			fifo->buff->len -= hdlci;	/* adjust size */
-			switch (fifo->fifonum) {
-			    case HFCUSB_D_RX:
-				skb_queue_tail(hfc->regd.
-					       drq,
-					       fifo->buff);
-				test_and_set_bit
-				    (HFCUSB_L1_DRX,
-				     &hfc->l1_event);
-				queue_task(&hfc->l1_tq,
-					   &tq_immediate);
-				mark_bh(IMMEDIATE_BH);
-				break;
+}				/* tx_iso_complete */
 
-			    case HFCUSB_B1_RX:
-				if (hfc->regd.brq[0]) {
-				    skb_queue_tail
-					(hfc->regd.
-					 brq[0],
-					 fifo->buff);
-				    hfc->regd.
-					bch_l1l2(hfc->
-						 regd.
-						 arg_hisax,
-						 0,
-						 PH_DATA
-						 |
-						 INDICATION,
-						 (void *)
-						 fifo->
-						 buff);
-				} else
-				    dev_kfree_skb_any
-					(fifo->buff);
-				break;
-				
-			    case HFCUSB_B2_RX:
-				if (hfc->regd.brq[1]) {
-				    skb_queue_tail
-					(hfc->regd.
-					 brq[1],
-					 fifo->buff);
-				    hfc->regd.
-					bch_l1l2(hfc->
-						 regd.
-						 arg_hisax,
-						 1,
-						 PH_DATA
-						 |
-						 INDICATION,
-						 (void
-						  *)
-						 fifo->
-						 buff);
-				} else
-				    dev_kfree_skb_any
-					(fifo->buff);
-				break;
+/*****************************************************/
+/* receive completion routine for all ISO tx fifos   */
+/*****************************************************/
+static void rx_iso_complete(struct urb *urb)
+{
+	iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
+	usb_fifo *fifo = context_iso_urb->owner_fifo;
+	hfcusb_data *hfc = fifo->hfc;
+	int k, len, errcode, offset, num_isoc_packets,fifon;
+	__u8 *buf;
 
-			    case HFCUSB_PCM_RX:
-				skb_queue_tail(&hfc->regd.
-					       erq,
-					       fifo->buff);
-				test_and_set_bit
-				    (HFCUSB_L1_ERX,
-				     &hfc->l1_event);
-				queue_task(&hfc->l1_tq,
-					   &tq_immediate);
-				mark_bh(IMMEDIATE_BH);
-				break;
+	fifon=fifo->fifonum;
+	// very weird error code when using ohci drivers, for now : ignore this error ...  (MB)
+	if(urb->status == -EOVERFLOW)
+	{
+		urb->status = 0;
+#ifdef VERBOSE_USB_DEBUG
+		printk(KERN_INFO "HFC-USB: ignoring USB DATAOVERRUN  for fifo  %i \n",fifon);
+#endif
+	}
 
-			    default:
-				dev_kfree_skb_any(fifo->
-						  buff);
-				break;
+	if(fifo->active && !urb->status)
+	{
+		num_isoc_packets=iso_packets[fifon];
+
+		// Generate D-Channel Iso Packets
+		for(k = 0; k < num_isoc_packets; ++k)
+		{
+			len=urb->iso_frame_desc[k].actual_length;
+			offset=urb->iso_frame_desc[k].offset;
+			buf=context_iso_urb->buffer+offset;
+
+			if(fifo->last_urblen!=fifo->usb_packet_maxlen)
+			{
+				// the threshold mask is in the 2nd status byte
+				hfc->threshold_mask=buf[1];
+				// the S0 state is in the upper half of the 1st status byte
+				state_handler(hfc,buf[0] >> 4);
+				// if we have more than the 2 status bytes -> collect data
+				if(len>2) collect_rx_frame(fifo,buf+2,len-2,buf[0]&1);
 			}
-			fifo->buff = skb;
-		    } 
-		    fifo->buff->len = 0;	/* reset counter */
-		    fifo->act_ptr = fifo->buff->data;	/* and pointer */
+			else collect_rx_frame(fifo,buf,len,0);
+
+			fifo->last_urblen=len;
+
+        }
+
+		// prepare ISO Urb
+		fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,context_iso_urb->buffer, num_isoc_packets,
+			fifo->usb_packet_maxlen, fifo->intervall, rx_iso_complete, urb->context);
+
+		errcode = usb_submit_urb(urb);
+		if(errcode < 0)
+		{
+			printk(KERN_INFO "HFC-USB: error submitting ISO URB: %i \n",  errcode);
+		}
+	}
+	else
+	{
+		if(urb->status)
+		{
+			printk(KERN_INFO "HFC-USB: rx_iso_complete : urb->status %i, fifonum %i\n",  urb->status,fifon);
+		}
+	}
+}				/* rx_iso_complete */
+
+
+/*****************************************************/
+/* collect data from interrupt or isochron in        */
+/*****************************************************/
+static void collect_rx_frame(usb_fifo *fifo,__u8 *data,int len,int finish)
+{
+	hfcusb_data *hfc = fifo->hfc;
+	int transp_mode,fifon;
+
+	fifon=fifo->fifonum;
+	transp_mode=0;
+	if(fifon<4 && hfc->b_mode[fifon/2]==L1_MODE_TRANS) transp_mode=TRUE;
+
+	//printk(KERN_INFO "HFC-USB: got %d bytes finish:%d max_size:%d fifo:%d\n",len,finish,fifo->max_size,fifon);
+	if(!fifo->skbuff)
+	{
+		// allocate sk buffer
+		fifo->skbuff=dev_alloc_skb(fifo->max_size + 3);
+		if(!fifo->skbuff)
+		{
+			printk(KERN_INFO "HFC-USB: cannot allocate buffer (dev_alloc_skb) fifo:%d\n",fifon);
+			return;
+		}
+		
+	}
+
+	if(len && fifo->skbuff->len+len<fifo->max_size)
+	{
+		memcpy(skb_put(fifo->skbuff,len),data,len);
+	}
+	else printk(KERN_INFO "HCF-USB: got frame exceeded fifo->max_size:%d\n",fifo->max_size);
+
+	// give transparent data up, when 128 byte are available
+	if(transp_mode && fifo->skbuff->len>=128)
+	{
+		fifo->hif->l1l2(fifo->hif,PH_DATA | INDICATION,fifo->skbuff);
+		fifo->skbuff = NULL;  // buffer was freed from upper layer
+		return;
+	}
+
+	// we have a complete hdlc packet
+	if(finish)
+	{
+		if(!fifo->skbuff->data[fifo->skbuff->len-1])
+		{
+			skb_trim(fifo->skbuff,fifo->skbuff->len-3);  // remove CRC & status
+
+			//printk(KERN_INFO "HFC-USB: got frame %d bytes on fifo:%d\n",fifo->skbuff->len,fifon);
+
+			if(fifon==HFCUSB_PCM_RX) fifo->hif->l1l2(fifo->hif,PH_DATA_E | INDICATION,fifo->skbuff);
+			else fifo->hif->l1l2(fifo->hif,PH_DATA | INDICATION,fifo->skbuff);
+
+			fifo->skbuff = NULL;  // buffer was freed from upper layer
+		}
+		else
+		{
+			printk(KERN_INFO "HFC-USB: got frame %d bytes but CRC ERROR!!!\n",fifo->skbuff->len);
+
+			skb_trim(fifo->skbuff,0);  // clear whole buffer
+		}
+	}
+
+	// LED flashing only in HDLC mode
+	if(!transp_mode)
+	{
+		if(fifon==HFCUSB_B1_RX) handle_led(hfc,LED_B1_DATA);
+		if(fifon==HFCUSB_B2_RX) handle_led(hfc,LED_B2_DATA);
+	}
+}
+
+/***********************************************/
+/* receive completion routine for all rx fifos */
+/***********************************************/
+static void rx_complete(struct urb *urb)
+{
+	int len;
+	__u8 *buf;
+	usb_fifo *fifo = (usb_fifo *) urb->context;	/* pointer to our fifo */
+	hfcusb_data *hfc = fifo->hfc;
+
+	urb->dev = hfc->dev;	/* security init */
+
+	if((!fifo->active) || (urb->status)) {
+#ifdef VERBOSE_USB_DEBUG
+		printk(KERN_INFO "HFC-USB: RX-Fifo %i is going down (%i)\n", fifo->fifonum, urb->status);
+#endif
+		fifo->urb->interval = 0;	/* cancel automatic rescheduling */
+		if(fifo->skbuff) {
+			dev_kfree_skb_any(fifo->skbuff);
+			fifo->skbuff = NULL;
 		}
+		return;
 	}
-	fifo->rx_offset = (urb->actual_length < fifo->usb_maxlen) ? 2 : 0;
-}				/* rx_complete */
+
+	len=urb->actual_length;
+	buf=fifo->buffer;
+
+	if(fifo->last_urblen!=fifo->usb_packet_maxlen) {
+		// the threshold mask is in the 2nd status byte
+		hfc->threshold_mask=buf[1];
+		// the S0 state is in the upper half of the 1st status byte
+		state_handler(hfc,buf[0] >> 4);
+		// if we have more than the 2 status bytes -> collect data
+		if(len>2) collect_rx_frame(fifo,buf+2,urb->actual_length-2,buf[0]&1);
+	} else
+		collect_rx_frame(fifo,buf,urb->actual_length,0);
+
+	fifo->last_urblen=urb->actual_length;
+
+
+}	/* rx_complete */
+
+
 
 /***************************************************/
 /* start the interrupt transfer for the given fifo */
 /***************************************************/
-static void
-start_rx_fifo(usb_fifo * fifo)
+static void start_int_fifo(usb_fifo * fifo)
 {
-	if (fifo->buff)
-		return;		/* still active */
-	if (!
-	    (fifo->buff =
-	     dev_alloc_skb(fifo->max_size + (fifo->transmode ? 0 : 3))))
-		return;
-	fifo->act_ptr = fifo->buff->data;
-	FILL_INT_URB(&fifo->urb, fifo->hfc->dev, fifo->pipe, fifo->buffer,
-		     fifo->usb_maxlen, rx_complete, fifo, fifo->intervall);
-	fifo->next_complete = 0;
-	fifo->rx_offset = 2;
-	fifo->active = 1;	/* must be marked active */
-	fifo->hfc->active_fifos |= fifo->fifo_mask;
-	if (usb_submit_urb(&fifo->urb)) {
+	int errcode;
+
+#ifdef VERBOSE_USB_DEBUG
+	printk(KERN_INFO "HFC-USB: starting intr IN fifo:%d\n", fifo->fifonum);
+#endif
+	if (!fifo->urb) {
+		fifo->urb = usb_alloc_urb(0);
+		if (!fifo->urb)
+			return;
+	}
+	usb_fill_int_urb(fifo->urb, fifo->hfc->dev, fifo->pipe, fifo->buffer,
+				 fifo->usb_packet_maxlen, rx_complete, fifo, fifo->intervall);
+	fifo->active = 1;		/* must be marked active */
+	errcode = usb_submit_urb(fifo->urb);
+
+	if(errcode)
+	{
+		printk(KERN_INFO "HFC-USB: submit URB error(start_int_info): status:%i\n",   errcode);
 		fifo->active = 0;
-		fifo->hfc->active_fifos &= ~fifo->fifo_mask;
-		dev_kfree_skb_any(fifo->buff);
-		fifo->buff = NULL;
+		fifo->skbuff = NULL;
 	}
-}				/* start_rx_fifo */
+} /* start_int_fifo */
 
-/***************************************************************/
-/* control completion routine handling background control cmds */
-/***************************************************************/
-static void
-ctrl_complete(purb_t urb)
+/*****************************/
+/* set the B-channel mode    */
+/*****************************/
+static void set_hfcmode(hfcusb_data *hfc,int channel,int mode)
 {
-	hfcusb_data *hfc = (hfcusb_data *) urb->context;
+	__u8 val,idx_table[2]={0,2};
 
-	urb->dev = hfc->dev;
-	if (hfc->ctrl_cnt) {
-		switch (hfc->ctrl_buff[hfc->ctrl_out_idx].hfc_reg) {
-			case HFCUSB_FIFO:
-				hfc->ctrl_fifo =
-				    hfc->ctrl_buff[hfc->ctrl_out_idx].
-				    reg_val;
-				break;
-			case HFCUSB_F_USAGE:
-				if (!hfc->dfifo_fill) {
-					fill_tx_urb(hfc->fifos +
-						    HFCUSB_D_TX);
-					if (hfc->fifos[HFCUSB_D_TX].buff)
-						usb_submit_urb(&hfc->
-							       fifos
-							       [HFCUSB_D_TX].
-							       urb);
-				} else {
-					queue_control_request(hfc,
-							      HFCUSB_FIFO,
-							      HFCUSB_D_TX);
-					queue_control_request(hfc,
-							      HFCUSB_F_USAGE,
-							      0);
-				}
-				break;
-			case HFCUSB_SCTRL_R:
-				switch (hfc->ctrl_fifo) {
-					case HFCUSB_B1_RX:
-						if (hfc->bch_enables & 1)
-							start_rx_fifo(hfc->
-								      fifos
-								      +
-								      HFCUSB_B1_RX);
-						break;
-					case HFCUSB_B2_RX:
-						if (hfc->bch_enables & 2)
-							start_rx_fifo(hfc->
-								      fifos
-								      +
-								      HFCUSB_B2_RX);
-						break;
-				}
-				if (hfc->bch_enables & 3)
-				    hfc->led_req |= LED_BCH;
-				else
-				    hfc->led_req &= ~LED_BCH;
-				break;
-			case HFCUSB_P_DATA:
-				hfc->led_act =
-				    hfc->ctrl_buff[hfc->ctrl_out_idx].
-				    reg_val;
-				break;
-		}
-		hfc->ctrl_cnt--;	/* decrement actual count */
-		if (++hfc->ctrl_out_idx >= HFC_CTRL_BUFSIZE)
-			hfc->ctrl_out_idx = 0;	/* pointer wrap */
-		ctrl_start_transfer(hfc);	/* start next transfer */
+#ifdef VERBOSE_ISDN_DEBUG
+  printk (KERN_INFO "HFC-USB: setting channel %d to mode %d\n",channel,mode);
+#endif
+
+	hfc->b_mode[channel]=mode;
+
+	// setup CON_HDLC
+	val=0;
+	if(mode!=L1_MODE_NULL) val=8;    // enable fifo?
+	if(mode==L1_MODE_TRANS) val|=2;  // set transparent bit
+
+	queue_control_request(hfc,HFCUSB_FIFO,idx_table[channel],1); // set FIFO to transmit register
+	queue_control_request(hfc,HFCUSB_CON_HDLC,val,1);
+	queue_control_request(hfc,HFCUSB_INC_RES_F,2,1); // reset fifo
+
+	queue_control_request(hfc,HFCUSB_FIFO,idx_table[channel]+1,1); // set FIFO to receive register
+	queue_control_request(hfc,HFCUSB_CON_HDLC,val,1);
+	queue_control_request(hfc,HFCUSB_INC_RES_F,2,1);  // reset fifo
+
+	val=0x40;
+	if(hfc->b_mode[0]) val|=1;
+	if(hfc->b_mode[1]) val|=2;
+	queue_control_request(hfc,HFCUSB_SCTRL,val,1);
+
+	val=0;
+	if(hfc->b_mode[0]) val|=1;
+	if(hfc->b_mode[1]) val|=2;
+	queue_control_request(hfc,HFCUSB_SCTRL_R,val,1);
+
+	if(mode==L1_MODE_NULL)
+	{
+		if(channel) handle_led(hfc,LED_B2_OFF);
+		else handle_led(hfc,LED_B1_OFF);
 	}
-}				/* ctrl_complete */
+	else
+	{
+		if(channel) handle_led(hfc,LED_B2_ON);
+		else handle_led(hfc,LED_B1_ON);
+	}
+}
 
-/*****************************************/
-/* Layer 1 + D channel access from HiSax */
-/*****************************************/
-static void
-hfcusb_l1_access(void *drvarg, int pr, void *arg)
-{
-	hfcusb_data *hfc = (hfcusb_data *) drvarg;
-
-	switch (pr) {
-		case (PH_DATA | REQUEST):
-		case (PH_PULL | INDICATION):
-			skb_queue_tail(hfc->regd.dsq,
-				       (struct sk_buff *) arg);
-			if (!hfc->fifos[HFCUSB_D_TX].active
-			    && !hfc->dfifo_fill) {
-				fill_tx_urb(hfc->fifos + HFCUSB_D_TX);
-				hfc->active_fifos |=
-				    hfc->fifos[HFCUSB_D_TX].fifo_mask;
-				usb_submit_urb(&hfc->fifos[HFCUSB_D_TX].
-					       urb);
-			}
-			break;
-		case (PH_ACTIVATE | REQUEST):
-		    switch (hfc->l1_state) {
-			case 6:
-			case 8:
-				hfc->regd.dch_l1l2(hfc->regd.arg_hisax,
-						   (PH_DEACTIVATE |
-						   INDICATION), NULL);
+/*
+   --------------------------------------------------------------------------------------
+   from here : hisax_if callback routines :
+     - void hfc_usb_d_l2l1(struct hisax_if *hisax_d_if, int pr, void *arg) {
 
-				break;
-			case 7:
-				hfc->regd.dch_l1l2(hfc->regd.arg_hisax,
-						   (PH_ACTIVATE |
-						   INDICATION), NULL);
+   l1 to l2 routines :
+     - static void hfc_usb_l1l2(hfcusb_data * hfc)
 
-				break;
-			default:
-				queue_control_request(hfc, HFCUSB_STATES, 0x60);	/* start activation */
-				hfc->t3_timer.expires =
-				    jiffies + (HFC_TIMER_T3 * HZ) / 1000;
-				if (!timer_pending(&hfc->t3_timer))
-					add_timer(&hfc->t3_timer);
-				break;
-		    }
-		    break;
+*/
 
-		case (PH_DEACTIVATE | REQUEST):
-			queue_control_request(hfc, HFCUSB_STATES, 0x40);	/* start deactivation */
-			break;
-		default:
-			printk(KERN_INFO "unknown hfcusb l1_access 0x%x\n",
-			       pr);
-			break;
-	}
-}				/* hfcusb_l1_access */
-
-/*******************************/
-/* B channel access from HiSax */
-/*******************************/
-static void
-hfcusb_bch_access(void *drvarg, int chan, int pr, void *arg)
-{
-	hfcusb_data *hfc = (hfcusb_data *) drvarg;
-	usb_fifo *fifo = hfc->fifos + (chan ? HFCUSB_B2_TX : HFCUSB_B1_TX);
-	long flags;
-
-	switch (pr) {
-		case (PH_DATA | REQUEST):
-		case (PH_PULL | INDICATION):
-			save_flags(flags);
-			cli();
-			if (!fifo->active) {
-				fill_tx_urb(fifo);
-				hfc->active_fifos |= fifo->fifo_mask;
-				usb_submit_urb(&fifo->urb);
-			}
-			restore_flags(flags);
-			break;
-		case (PH_ACTIVATE | REQUEST):
-			if (!((int) arg)) {
-				hfc->bch_enables &= ~(1 << chan);
-				if (fifo->active) {
-					fifo->active = 0;
-					usb_unlink_urb(&fifo->urb);
+void hfc_usb_l2l1(struct hisax_if *my_hisax_if, int pr, void *arg)
+{
+    usb_fifo *fifo = my_hisax_if->priv;
+	hfcusb_data *hfc = fifo->hfc;
+
+    switch (pr) {
+		case PH_ACTIVATE | REQUEST:
+				if(fifo->fifonum==HFCUSB_D_TX)
+				{
+#ifdef VERBOSE_ISDN_DEBUG
+					printk (KERN_INFO "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_ACTIVATE | REQUEST\n");
+#endif
+					queue_control_request(hfc, HFCUSB_STATES,0x60,1);	/* make activation */
+					hfc->t3_timer.expires = jiffies + (HFC_TIMER_T3 * HZ) / 1000;
+					if(!timer_pending(&hfc->t3_timer)) add_timer(&hfc->t3_timer);
 				}
-				save_flags(flags);
-				cli();
-				queue_control_request(hfc, HFCUSB_FIFO,
-						      fifo->fifonum);
-				queue_control_request(hfc,
-						      HFCUSB_INC_RES_F, 2);
-				queue_control_request(hfc, HFCUSB_CON_HDLC,
-						      9);
-				queue_control_request(hfc, HFCUSB_SCTRL,
-						      0x40 +
-						      hfc->bch_enables);
-				queue_control_request(hfc, HFCUSB_SCTRL_R,
-						      hfc->bch_enables);
-				restore_flags(flags);
-				fifo++;
-				if (fifo->active) {
-					fifo->active = 0;
-					usb_unlink_urb(&fifo->urb);
+				else
+				{
+#ifdef VERBOSE_ISDN_DEBUG
+					printk (KERN_INFO "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_ACTIVATE | REQUEST\n");
+#endif
+					set_hfcmode(hfc,(fifo->fifonum==HFCUSB_B1_TX) ? 0 : 1 ,(int)arg);
+					fifo->hif->l1l2(fifo->hif,PH_ACTIVATE | INDICATION, NULL);
 				}
-				return;	/* fifo deactivated */
-			}
-			fifo->transmode = ((int) arg == L1_MODE_TRANS);
-			fifo->max_size =
-			    ((fifo->transmode) ? fifo->
-			     usb_maxlen : MAX_BCH_SIZE);
-			(fifo + 1)->transmode = fifo->transmode;
-			(fifo + 1)->max_size = fifo->max_size;
-			hfc->bch_enables |= (1 << chan);
-			save_flags(flags);
-			cli();
-			queue_control_request(hfc, HFCUSB_FIFO,
-					      fifo->fifonum);
-			queue_control_request(hfc, HFCUSB_CON_HDLC,
-					      ((!fifo->
-						transmode) ? 9 : 11));
-			queue_control_request(hfc, HFCUSB_INC_RES_F, 2);
-			queue_control_request(hfc, HFCUSB_SCTRL,
-					      0x40 + hfc->bch_enables);
-			if ((int) arg == L1_MODE_HDLC)
-				queue_control_request(hfc, HFCUSB_CON_HDLC,
-						      8);
-			queue_control_request(hfc, HFCUSB_FIFO,
-					      fifo->fifonum + 1);
-			queue_control_request(hfc, HFCUSB_CON_HDLC,
-					      ((!fifo->
-						transmode) ? 8 : 10));
-			queue_control_request(hfc, HFCUSB_INC_RES_F, 2);
-			queue_control_request(hfc, HFCUSB_SCTRL_R,
-					      hfc->bch_enables);
-			restore_flags(flags);
-
-			break;
-
-		default:
-			printk(KERN_INFO
-			       "unknown hfcusb bch_access chan %d 0x%x\n",
-			       chan, pr);
-			break;
-	}
-}				/* hfcusb_bch_access */
+                break;
+        case PH_DEACTIVATE | REQUEST:
+				if(fifo->fifonum==HFCUSB_D_TX)
+				{
+#ifdef VERBOSE_ISDN_DEBUG
+					printk (KERN_INFO "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_DEACTIVATE | REQUEST\n");
+#endif
+					printk (KERN_INFO "HFC-USB: ISDN TE device should not deativate...\n");
+				}
+				else
+				{
+#ifdef VERBOSE_ISDN_DEBUG
+					printk (KERN_INFO "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_DEACTIVATE | REQUEST\n");
+#endif
+					set_hfcmode(hfc,(fifo->fifonum==HFCUSB_B1_TX) ? 0 : 1 ,(int)L1_MODE_NULL);
+					fifo->hif->l1l2(fifo->hif,PH_DEACTIVATE | INDICATION, NULL);
+				}
+                break;
+		case PH_DATA | REQUEST:
+				if(fifo->skbuff && fifo->delete_flg)
+				{
+					dev_kfree_skb_any(fifo->skbuff);
+					//printk(KERN_INFO "skbuff=NULL on fifo:%d\n",fifo->fifonum);
+					fifo->skbuff = NULL;
+					fifo->delete_flg=FALSE;
+				}
+
+				fifo->skbuff=arg; // we have a new buffer
+
+				//if(fifo->fifonum==HFCUSB_D_TX) printk (KERN_INFO "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_DATA | REQUEST\n");
+				//else printk (KERN_INFO "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_DATA | REQUEST\n");
+                break;
+        default:
+                printk (KERN_INFO "HFC_USB: hfc_usb_d_l2l1: unkown state : %#x\n", pr);
+                break;
+    }
+}
+
+// valid configurations
+#define CNF_4INT3ISO  1      // 4 INT IN, 3 ISO OUT
+#define CNF_3INT3ISO  2      // 3 INT IN, 3 ISO OUT
+#define CNF_4ISO3ISO  3      // 4 ISO IN, 3 ISO OUT
+#define CNF_3ISO3ISO  4 	 // 3 ISO IN, 3 ISO OUT
+
+
+/*
+   --------------------------------------------------------------------------------------
+   From here on USB initialization and deactivation related routines are implemented :
+
+   - hfc_usb_init :
+      is the main Entry Point for the USB Subsystem when the device get plugged
+      in. This function calls usb_register with usb_driver as parameter.
+      Here, further entry points for probing (hfc_usb_probe) and disconnecting
+      the device (hfc_usb_disconnect) are published, as the id_table
+
+   - hfc_usb_probe
+      this function is called by the usb subsystem, and steps through the alternate
+      settings of the currently plugged in device to detect all Endpoints needed to
+      run an ISDN TA.
+      Needed EndPoints are
+      3 (+1) IntIn EndPoints   (D-in,  E-in, B1-in, B2-in, (E-in)) or
+      3 (+1) Isochron In Endpoints (D-out, B1-out, B2-out) and 3 IsoOut Endpoints
+      The currently used transfer mode of on the Out-Endpoints will be stored in
+      hfc->usb_transfer_mode and is either USB_INT or USB_ISO
+      When a valid alternate setting could be found, the usb_init (see blow)
+      function is called
+
+   - usb_init
+      Here, the HFC_USB Chip itself gets initialized and the USB framework to send/receive
+      Data to/from the several EndPoints are initialized:
+       The E- and D-Channel Int-In chain gets started
+       The IsoChain for the Iso-Out traffic get started
+
+   - hfc_usb_disconnect
+      this function is called by the usb subsystem and has to free all resources
+      and stop all usb traffic to allow a proper hotplugging disconnect.
+
+*/
 
 /***************************************************************************/
 /* usb_init is called once when a new matching device is detected to setup */
-/* main parmeters. It registers the driver at the main hisax module.       */
+/* main parameters. It registers the driver at the main hisax module.       */
 /* on success 0 is returned.                                               */
 /***************************************************************************/
-static int
-usb_init(hfcusb_data * hfc)
+static int usb_init(hfcusb_data * hfc)
 {
 	usb_fifo *fifo;
-	int i;
+	int i, err;
 	u_char b;
-
+	struct hisax_b_if *p_b_if[2];
+	
 	/* check the chip id */
-	if ((Read_hfc(hfc, HFCUSB_CHIP_ID, &b) != 1) ||
-	    (b != HFCUSB_CHIPID)) {
+	printk(KERN_INFO "HFCUSB_CHIP_ID begin\n");
+	if (read_usb(hfc, HFCUSB_CHIP_ID, &b) != 1) {
+		printk(KERN_INFO "HFC-USB: cannot read chip id\n");
+		return(1); 
+	}
+	printk(KERN_INFO "HFCUSB_CHIP_ID %x\n", b);
+	if (b != HFCUSB_CHIPID) {
 		printk(KERN_INFO "HFC-USB: Invalid chip id 0x%02x\n", b);
-		return (1);
+		return(1);
 	}
 
 	/* first set the needed config, interface and alternate */
-	usb_set_configuration(hfc->dev, 1);
-	usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
+	printk(KERN_INFO "usb_init 1\n");
+//	usb_set_configuration(hfc->dev, 1);
+	printk(KERN_INFO "usb_init 2\n");
+	err = usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
+	printk(KERN_INFO "usb_init usb_set_interface return %d\n", err);
+	/* now we initialize the chip */
+	write_usb(hfc, HFCUSB_CIRM, 8);	    // do reset
+	write_usb(hfc, HFCUSB_CIRM, 0x10);	// aux = output, reset off
 
-        /* init the led state request */
-	hfc->led_req = LED_DRIVER;
+	// set USB_SIZE to match the the wMaxPacketSize for INT or BULK transfers
+	write_usb(hfc, HFCUSB_USB_SIZE,(hfc->packet_size/8) | ((hfc->packet_size/8) << 4));
 
-	/* now we initialise the chip */
-	Write_hfc(hfc, HFCUSB_CIRM, 0x10);	/* aux = output, reset off */
-	Write_hfc(hfc, HFCUSB_P_DATA, 0);       /* leds = off */
-	Write_hfc(hfc, HFCUSB_USB_SIZE,
-		  (hfc->fifos[HFCUSB_B1_TX].usb_maxlen >> 3) |
-		  ((hfc->fifos[HFCUSB_B1_RX].usb_maxlen >> 3) << 4));
+	// set USB_SIZE_I to match the the wMaxPacketSize for ISO transfers
+	write_usb(hfc, HFCUSB_USB_SIZE_I, hfc->iso_packet_size);
 
 	/* enable PCM/GCI master mode */
-	Write_hfc(hfc, HFCUSB_MST_MODE1, 0);	/* set default values */
-	Write_hfc(hfc, HFCUSB_MST_MODE0, 1);	/* enable master mode */
+	write_usb(hfc, HFCUSB_MST_MODE1, 0);	/* set default values */
+	write_usb(hfc, HFCUSB_MST_MODE0, 1);	/* enable master mode */
 
 	/* init the fifos */
-	Write_hfc(hfc, HFCUSB_F_THRES, (HFCUSB_TX_THRESHOLD >> 3) |
-		  ((HFCUSB_RX_THRESHOLD >> 3) << 4));
+	write_usb(hfc, HFCUSB_F_THRES, (HFCUSB_TX_THRESHOLD/8) |((HFCUSB_RX_THRESHOLD/8) << 4));
 
-	for (i = 0, fifo = hfc->fifos + i; i < HFCUSB_NUM_FIFOS;
-	     i++, fifo++) {
-		Write_hfc(hfc, HFCUSB_FIFO, i);	/* select the desired fifo */
-
-		fifo->transmode = 0;	/* hdlc mode selected */
-		fifo->buff = NULL;	/* init buffer pointer */
-		fifo->max_size =
-		    (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
-		Write_hfc(hfc, HFCUSB_HDLC_PAR, ((i <= HFCUSB_B2_RX) ? 0 : 2));	/* data length */
-		Write_hfc(hfc, HFCUSB_CON_HDLC, ((i & 1) ? 0x08 : 0x09));	/* rx hdlc, tx fill 1 */
-		Write_hfc(hfc, HFCUSB_INC_RES_F, 2);	/* reset the fifo */
-	}
-
-	Write_hfc(hfc, HFCUSB_CLKDEL, 0x0f);	/* clock delay value */
-	Write_hfc(hfc, HFCUSB_STATES, 3 | 0x10);	/* set deactivated mode */
-	Write_hfc(hfc, HFCUSB_STATES, 3);	/* enable state machine */
+	fifo = hfc->fifos;
+	for(i = 0; i < HFCUSB_NUM_FIFOS; i++)
+	{
+		write_usb(hfc, HFCUSB_FIFO, i);	/* select the desired fifo */
+		fifo[i].skbuff = NULL;	/* init buffer pointer */
+		fifo[i].max_size = (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
+		fifo[i].last_urblen=0;
+		write_usb(hfc, HFCUSB_HDLC_PAR, ((i <= HFCUSB_B2_RX) ? 0 : 2));	    // set 2 bit for D- & E-channel
+		write_usb(hfc, HFCUSB_CON_HDLC, ((i==HFCUSB_D_TX) ? 0x09 : 0x08));	// rx hdlc, enable IFF for D-channel
+		write_usb(hfc, HFCUSB_INC_RES_F, 2);	/* reset the fifo */
+	}
 
-	Write_hfc(hfc, HFCUSB_SCTRL_R, 0);	/* disable both B receivers */
-	Write_hfc(hfc, HFCUSB_SCTRL, 0x40);	/* disable B transmitters + cap mode */
+	write_usb(hfc, HFCUSB_CLKDEL, 0x0f);	 /* clock delay value */
+	write_usb(hfc, HFCUSB_STATES, 3 | 0x10); /* set deactivated mode */
+	write_usb(hfc, HFCUSB_STATES, 3);	     /* enable state machine */
+
+	write_usb(hfc, HFCUSB_SCTRL_R, 0);	     /* disable both B receivers */
+	write_usb(hfc, HFCUSB_SCTRL, 0x40);	     /* disable B transmitters + capacitive mode */
+
+	// set both B-channel to not connected
+	hfc->b_mode[0]=L1_MODE_NULL;
+	hfc->b_mode[1]=L1_MODE_NULL;
+
+	hfc->l1_activated=FALSE;
+	hfc->led_state=0;
+	hfc->led_new_data=0;
 
-	/* init the l1 timer */
+	/* init the t3 timer */
 	init_timer(&hfc->t3_timer);
 	hfc->t3_timer.data = (long) hfc;
-	hfc->t3_timer.function = (void *) l1_timer_expire;
+	hfc->t3_timer.function = (void *) l1_timer_expire_t3;
+	/* init the t4 timer */
+	init_timer(&hfc->t4_timer);
 	hfc->t4_timer.data = (long) hfc;
-	hfc->t4_timer.function = (void *) l1_timer_expire;
-	hfc->l1_tq.routine = (void *) (void *) usb_l1d_bh;
-	hfc->l1_tq.sync = 0;
-	hfc->l1_tq.data = hfc;
-
-	/* init the background control machinery */
-	hfc->ctrl_read.requesttype = 0xc0;
-	hfc->ctrl_read.request = 1;
-	hfc->ctrl_read.length = 1;
-	hfc->ctrl_write.requesttype = 0x40;
-	hfc->ctrl_write.request = 0;
-	hfc->ctrl_write.length = 0;
-	FILL_CONTROL_URB(&hfc->ctrl_urb, hfc->dev, hfc->ctrl_out_pipe,
-			 (u_char *) & hfc->ctrl_write, NULL, 0,
-			 ctrl_complete, hfc);
-
-	/* init the TX-urbs */
-	fifo = hfc->fifos + HFCUSB_D_TX;
-	FILL_BULK_URB(&fifo->urb, hfc->dev, fifo->pipe,
-		      (u_char *) fifo->buffer, 0, tx_complete, fifo);
-	fifo = hfc->fifos + HFCUSB_B1_TX;
-	FILL_BULK_URB(&fifo->urb, hfc->dev, fifo->pipe,
-		      (u_char *) fifo->buffer, 0, tx_complete, fifo);
-	fifo = hfc->fifos + HFCUSB_B2_TX;
-	FILL_BULK_URB(&fifo->urb, hfc->dev, fifo->pipe,
-		      (u_char *) fifo->buffer, 0, tx_complete, fifo);
-
-	/* init the E-buffer */
-	skb_queue_head_init(&hfc->regd.erq);
-
-	/* now register ourself at hisax */
-	hfc->regd.version = HISAX_LOAD_VERSION;	/* set our version */
-	hfc->regd.cmd = HISAX_LOAD_REGISTER;	/* register command */
-	hfc->regd.argl1 = (void *) hfc;	/* argument for our local routine */
-	hfc->regd.dch_l2l1 = hfcusb_l1_access;
-	hfc->regd.bch_l2l1 = hfcusb_bch_access;
-	hfc->regd.drvname = "hfc_usb";
-	if (hisax_register_hfcusb(&hfc->regd)) {
-		printk(KERN_INFO "HFC-USB failed to register at hisax\n");
-		Write_hfc(hfc, HFCUSB_CIRM, 0x08);	/* aux = input, reset on */
-		return (1);
-	}
-
-	/* startup the D- and E-channel fifos */
-	start_rx_fifo(hfc->fifos + HFCUSB_D_RX);	/* D-fifo */
-	if (hfc->fifos[HFCUSB_PCM_RX].pipe)
-		start_rx_fifo(hfc->fifos + HFCUSB_PCM_RX);	/* E-fifo */
+	hfc->t4_timer.function = (void *) l1_timer_expire_t4;
+	/* init the led timer */
+	init_timer(&hfc->led_timer);
+	hfc->led_timer.data = (long) hfc;
+	hfc->led_timer.function = (void *) led_timer;
+	// trigger 4 hz led timer
+	hfc->led_timer.expires = jiffies + (LED_TIME * HZ) / 1000;
+	if(!timer_pending(&hfc->led_timer)) add_timer(&hfc->led_timer);
+
+	// init the background machinery for control requests
+	hfc->ctrl_read.bRequestType = 0xc0;
+	hfc->ctrl_read.bRequest = 1;
+	hfc->ctrl_read.wLength = 1;
+	hfc->ctrl_write.bRequestType = 0x40;
+	hfc->ctrl_write.bRequest = 0;
+	hfc->ctrl_write.wLength = 0;
+	usb_fill_control_urb(hfc->ctrl_urb, hfc->dev, hfc->ctrl_out_pipe,(u_char *) & hfc->ctrl_write, NULL, 0, ctrl_complete, hfc);
+					
+	/* Init All Fifos */
+	for(i = 0; i < HFCUSB_NUM_FIFOS; i++)
+	{
+		hfc->fifos[i].iso[0].purb = NULL;
+		hfc->fifos[i].iso[1].purb = NULL;
+		hfc->fifos[i].active = 0;
+	}
+
+	// register like Germaschewski :
+	hfc->d_if.owner = THIS_MODULE;
+	hfc->d_if.ifc.priv = &hfc->fifos[HFCUSB_D_TX];
+	hfc->d_if.ifc.l2l1 = hfc_usb_l2l1;
+
+	for (i=0; i<2; i++)
+	{
+		hfc->b_if[i].ifc.priv = &hfc->fifos[HFCUSB_B1_TX+i*2];
+		hfc->b_if[i].ifc.l2l1 = hfc_usb_l2l1;
+		p_b_if[i] = &hfc->b_if[i];
+	}
+	
+	hfc->protocol = 2;  /* default EURO ISDN, should be a module_param */
+	hisax_register(&hfc->d_if, p_b_if, "hfc_usb", hfc->protocol);
+	
+	for (i=0; i<4; i++)
+		hfc->fifos[i].hif=&p_b_if[i/2]->ifc;
+	for (i=4; i<8; i++)
+		hfc->fifos[i].hif=&hfc->d_if.ifc;
+
+	// 3 (+1) INT IN + 3 ISO OUT
+	if(hfc->cfg_used == CNF_3INT3ISO || hfc->cfg_used == CNF_4INT3ISO)
+	{
+		start_int_fifo(hfc->fifos + HFCUSB_D_RX);	// Int IN D-fifo
+		if(hfc->fifos[HFCUSB_PCM_RX].pipe) start_int_fifo(hfc->fifos + HFCUSB_PCM_RX);	// E-fifo
+		start_int_fifo(hfc->fifos + HFCUSB_B1_RX);	// Int IN B1-fifo
+		start_int_fifo(hfc->fifos + HFCUSB_B2_RX);	// Int IN B2-fifo
+	}
+
+	// 3 (+1) ISO IN + 3 ISO OUT
+	if(hfc->cfg_used==CNF_3ISO3ISO || hfc->cfg_used==CNF_4ISO3ISO)
+	{
+		start_isoc_chain(hfc->fifos + HFCUSB_D_RX, ISOC_PACKETS_D, rx_iso_complete,16);
+		if(hfc->fifos[HFCUSB_PCM_RX].pipe) start_isoc_chain(hfc->fifos + HFCUSB_PCM_RX, ISOC_PACKETS_D, rx_iso_complete,16);
+		start_isoc_chain(hfc->fifos + HFCUSB_B1_RX, ISOC_PACKETS_B, rx_iso_complete,16);
+		start_isoc_chain(hfc->fifos + HFCUSB_B2_RX, ISOC_PACKETS_B, rx_iso_complete,16);
+	}
+
+	start_isoc_chain(hfc->fifos + HFCUSB_D_TX, ISOC_PACKETS_D, tx_iso_complete,1);
+	start_isoc_chain(hfc->fifos + HFCUSB_B1_TX, ISOC_PACKETS_B, tx_iso_complete,1);
+	start_isoc_chain(hfc->fifos + HFCUSB_B2_TX, ISOC_PACKETS_B, tx_iso_complete,1);
+
+	handle_led(hfc,LED_POWER_ON);
+
+	return(0);
+}	/* usb_init */
+
+
+/****************************************/
+/* data defining the devices to be used */
+/****************************************/
+// static __devinitdata const struct usb_device_id hfc_usb_idtab[3] = {
+static struct usb_device_id hfc_usb_idtab[] = {
+	{USB_DEVICE(0x7b0, 0x0007)},	/* Billion USB TA 2 */
+	{USB_DEVICE(0x742, 0x2008)},	/* Stollmann USB TA */
+	{USB_DEVICE(0x959, 0x2bd0)},	/* Colognechip USB eval TA */
+	{USB_DEVICE(0x8e3, 0x0301)},	/* OliTec ISDN USB */
+	{USB_DEVICE(0x675, 0x1688)},	/* DrayTec ISDN USB */
+	{USB_DEVICE(0x7fa, 0x0846)},    /* Bewan ISDN USB TA */
+	{}				/* end with an all-zeroes entry */
+};
+
+MODULE_AUTHOR("Peter Sprenger (sprenger@moving-byters.de)/Martin Bachem (info@colognechip.com)");
+MODULE_DESCRIPTION("HFC I4L USB driver");
+MODULE_DEVICE_TABLE(usb, hfc_usb_idtab);
+MODULE_LICENSE("GPL");
+
+#define EP_NUL 1    // Endpoint at this position not allowed
+#define EP_NOP 2	// all type of endpoints allowed at this position
+#define EP_ISO 3	// Isochron endpoint mandatory at this position
+#define EP_BLK 4	// Bulk endpoint mandatory at this position
+#define EP_INT 5	// Interrupt endpoint mandatory at this position
+
+// this array represents all endpoints possible in the HCF-USB
+// the last 2 entries are the configuration number and the minimum interval for Interrupt endpoints
+int validconf[][18]=
+{
+	// INT in, ISO out config
+	{EP_NUL,EP_INT,EP_NUL,EP_INT,EP_NUL,EP_INT,EP_NOP,EP_INT,EP_ISO,EP_NUL,EP_ISO,EP_NUL,EP_ISO,EP_NUL,EP_NUL,EP_NUL,CNF_4INT3ISO,2},
+	{EP_NUL,EP_INT,EP_NUL,EP_INT,EP_NUL,EP_INT,EP_NUL,EP_NUL,EP_ISO,EP_NUL,EP_ISO,EP_NUL,EP_ISO,EP_NUL,EP_NUL,EP_NUL,CNF_3INT3ISO,2},
+	// ISO in, ISO out config
+	{EP_NUL,EP_NUL,EP_NUL,EP_NUL,EP_NUL,EP_NUL,EP_NUL,EP_NUL,EP_ISO,EP_ISO,EP_ISO,EP_ISO,EP_ISO,EP_ISO,EP_NOP,EP_ISO,CNF_4ISO3ISO,2},
+	{EP_NUL,EP_NUL,EP_NUL,EP_NUL,EP_NUL,EP_NUL,EP_NUL,EP_NUL,EP_ISO,EP_ISO,EP_ISO,EP_ISO,EP_ISO,EP_ISO,EP_NUL,EP_NUL,CNF_3ISO3ISO,2},
+	{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}       // EOL element
+};
+
+// string description of chosen config
+char *conf_str[]=
+{
+	"4 Interrupt IN + 3 Isochron OUT",
+	"3 Interrupt IN + 3 Isochron OUT",
+	"4 Isochron IN + 3 Isochron OUT",
+	"3 Isochron IN + 3 Isochron OUT"
+};
 
-	return (0);
-}				/* usb_init */
 
 /*************************************************/
 /* function called to probe a new plugged device */
 /*************************************************/
-static void *
-hfc_usb_probe(struct usb_device *dev, unsigned int interface
-#ifdef COMPAT_HAS_USB_IDTAB
-	      , const struct usb_device_id *id_table)
-#else
-    )
-#endif
+//static int hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
+static void* hfc_usb_probe(struct usb_device *dev, unsigned int ifnum, const struct usb_device_id *id)
 {
+        //struct usb_device *dev= interface_to_usbdev(intf);
+	struct usb_interface* intf = dev->actconfig->interface + ifnum;
 	hfcusb_data *context;
-	struct usb_interface *ifp = dev->actconfig->interface + interface;
-	struct usb_interface_descriptor *ifdp =
-	    ifp->altsetting + ifp->act_altsetting;
-	struct usb_endpoint_descriptor *epd;
-	int i, idx, ep_msk;
-
-#ifdef COMPAT_HAS_USB_IDTAB
-	if (id_table && (dev->descriptor.idVendor == id_table->idVendor) &&
-	    (dev->descriptor.idProduct == id_table->idProduct) &&
-#else
-	if ((((dev->descriptor.idVendor == 0x959) &&
-	    (dev->descriptor.idProduct == 0x2bd0)) ||
-	    ((dev->descriptor.idVendor == 0x7b0) &&
-	    (dev->descriptor.idProduct == 0x0006))) &&
-#endif
-	    (ifdp->bNumEndpoints >= 6) && (ifdp->bNumEndpoints <= 16)) {
-		if (!(context = kmalloc(sizeof(hfcusb_data), GFP_KERNEL))) {
-			return (NULL);	/* got no mem */
-		};
-		memset(context, 0, sizeof(hfcusb_data));	/* clear the structure */
-		i = ifdp->bNumEndpoints;	/* get number of endpoints */
-		ep_msk = 0;	/* none found */
-		epd = ifdp->endpoint;	/* first endpoint descriptor */
-		while (i-- && ((ep_msk & 0xcf) != 0xcf)) {
-
-			idx = (((epd->bEndpointAddress & 0x7f) - 1) << 1);	/* get endpoint base */
-			if (idx < 7) {
-				switch (epd->bmAttributes) {
-					case USB_ENDPOINT_XFER_INT:
-						if (!
-						    (epd->
-						     bEndpointAddress &
-						     0x80))
-							break;	/* only interrupt in allowed */
-						idx++;	/* input index is odd */
-						context->fifos[idx].pipe =
-						    usb_rcvintpipe(dev,
-								   epd->
-								   bEndpointAddress);
-						break;
-
-					case USB_ENDPOINT_XFER_BULK:
-						if (epd->
-						    bEndpointAddress &
-						    0x80)
-							break;	/* only bulk out allowed */
-						context->fifos[idx].pipe =
-						    usb_sndbulkpipe(dev,
-								    epd->
-								    bEndpointAddress);
-						break;
-					default:
-						context->fifos[idx].pipe = 0;	/* reset data */
-				}	/* switch attribute */
-
-				if (context->fifos[idx].pipe) {
-					context->fifos[idx].fifonum = idx;
-					context->fifos[idx].fifo_mask =
-					    1 << idx;
-					context->fifos[idx].hfc = context;
-					context->fifos[idx].usb_maxlen =
-					    epd->wMaxPacketSize;
-					context->fifos[idx].intervall =
-					    epd->bInterval;
-					ep_msk |= (1 << idx);
-				} else
-					ep_msk &= ~(1 << idx);
-			}	/* idx < 7 */
-			epd++;
-		}
+	//struct usb_host_interface *iface = intf->cur_altsetting;
+	//struct usb_host_interface *iface_used = NULL;
+	//struct usb_host_endpoint *ep;
+	struct usb_endpoint_descriptor* ep;
+	//int ifnum = iface->desc.bInterfaceNumber;
+	struct usb_interface_descriptor* intfdesc = intf->altsetting + intf->act_altsetting;
+	struct usb_interface_descriptor* intfdesc_used = NULL;
+	int i, idx, alt_idx, probe_alt_setting, vend_idx, cfg_used, *vcf, attr, cfg_found, cidx, ep_addr;
+	int cmptbl[16],small_match,iso_packet_size,packet_size,alt_used=0;
+
+//        usb_show_device(dev);
+//	usb_show_device_descriptor(&dev->descriptor);
+//	usb_show_interface_descriptor(&iface->desc);
+	vend_idx=0xffff;
+	for(i=0;vdata[i].vendor;i++)
+	{
+		if(dev->descriptor.idVendor==vdata[i].vendor && dev->descriptor.idProduct==vdata[i].prod_id) vend_idx=i;
+	}
+	
 
-		if ((ep_msk & 0x3f) != 0x3f) {
-			kfree(context);
-			return (NULL);
-		}
-		MOD_INC_USE_COUNT;	/* lock our module */
-		context->dev = dev;	/* save device */
-		context->if_used = interface;	/* save used interface */
-		context->alt_used = ifp->act_altsetting;	/* and alternate config */
-		context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;	/* control size */
-
-		/* create the control pipes needed for register access */
-		context->ctrl_in_pipe = usb_rcvctrlpipe(context->dev, 0);
-		context->ctrl_out_pipe = usb_sndctrlpipe(context->dev, 0);
-
-		/* init the chip and register the driver */
-		if (usb_init(context)) {
-			kfree(context);
-			MOD_DEC_USE_COUNT;
-			return (NULL);
-		}
+#ifdef VERBOSE_USB_DEBUG	
+	printk(KERN_INFO "HFC-USB: probing interface(%d) actalt(%d)\n",
+		ifnum, intfdesc->bAlternateSetting); 
+	/*	printk(KERN_INFO "HFC-USB: probing interface(%d) actalt(%d) minor(%d)\n",
+		ifnum, intfdesc->bAlternateSetting, intf->driver->minor); */
+#endif
 
-		printk(KERN_INFO
-		       "HFC-USB: New device if=%d alt=%d registered\n",
-		       context->if_used, context->alt_used);
-		return (context);
-	}
+	if (vend_idx != 0xffff) {
+#ifdef VERBOSE_USB_DEBUG
+		printk(KERN_INFO "HFC-USB: found vendor idx:%d  name:%s\n",vend_idx,vdata[vend_idx].vend_name);
+#endif
+		/* if vendor and product ID is OK, start probing a matching alternate setting ... */
+		alt_idx = 0;
+		small_match=0xffff;
+		// default settings
+		iso_packet_size=16;
+		packet_size=64;
+
+		while (alt_idx < intf->num_altsetting) {
+		        //iface = intf->altsetting + alt_idx;
+			intfdesc = intf->altsetting + alt_idx;
+			probe_alt_setting = intfdesc->bAlternateSetting;
+			cfg_used=0;
 
-	return (NULL);		/* no matching entry */
-}				/* hfc_usb_probe */
+#ifdef VERBOSE_USB_DEBUG
+			printk(KERN_INFO "HFC-USB: test alt_setting %d\n", probe_alt_setting);
+#endif
+			// check for config EOL element
+			while (validconf[cfg_used][0]) {
+				cfg_found=TRUE;
+				vcf=validconf[cfg_used];
+				ep = intfdesc->endpoint;	/* first endpoint descriptor */
+
+#ifdef VERBOSE_USB_DEBUG
+				printk(KERN_INFO "HFC-USB: (if=%d alt=%d cfg_used=%d)\n",
+					ifnum, probe_alt_setting, cfg_used);
+#endif
+				// copy table
+				memcpy(cmptbl,vcf,16*sizeof(int));
+
+				// check for all endpoints in this alternate setting
+				for (i=0; i < intfdesc->bNumEndpoints; i++) {
+					ep_addr = ep->bEndpointAddress;
+					idx = ((ep_addr & 0x7f)-1)*2;	/* get endpoint base */
+					if (ep_addr & 0x80)
+						idx++;
+					attr = ep->bmAttributes;
+
+					if (cmptbl[idx] == EP_NUL) {
+						printk(KERN_INFO "HFC-USB: cfg_found=FALSE in idx:%d  attr:%d  cmptbl[%d]:%d\n",
+							idx, attr, idx, cmptbl[idx]);
+						cfg_found = FALSE;
+					}
+
+					if (attr == USB_ENDPOINT_XFER_INT && cmptbl[idx] == EP_INT)
+						cmptbl[idx] = EP_NUL;
+					if (attr == USB_ENDPOINT_XFER_BULK && cmptbl[idx] == EP_BLK)
+						cmptbl[idx] = EP_NUL;
+					if (attr == USB_ENDPOINT_XFER_ISOC && cmptbl[idx] == EP_ISO)
+						cmptbl[idx] = EP_NUL;
+
+					// check if all INT endpoints match minimum interval
+					if (attr == USB_ENDPOINT_XFER_INT && ep->bInterval < vcf[17]) {
+#ifdef VERBOSE_USB_DEBUG
+						if (cfg_found)
+							printk(KERN_INFO "HFC-USB: Interrupt Endpoint interval < %d found - skipping config\n",
+								vcf[17]);
+#endif
+						cfg_found = FALSE;
+					}
+
+					ep++;
+				}
+
+				for (i = 0; i < 16; i++) {
+					// printk(KERN_INFO "HFC-USB: cmptbl[%d]:%d\n", i, cmptbl[i]);
+
+					// all entries must be EP_NOP or EP_NUL for a valid config
+					if (cmptbl[i] != EP_NOP && cmptbl[i] != EP_NUL)
+						cfg_found = FALSE;
+				}
+
+				// we check for smallest match, to provide configuration priority
+				// configurations with smaller index have higher priority
+				if (cfg_found) {
+					if (cfg_used < small_match) {
+						small_match = cfg_used;
+						alt_used = probe_alt_setting;
+						//iface_used = iface;
+						intfdesc_used = intfdesc;
+					}
+#ifdef VERBOSE_USB_DEBUG
+					printk(KERN_INFO "HFC-USB: small_match=%x %x\n", small_match, alt_used);
+#endif
+				}
+
+				cfg_used++;
+			}
+
+			alt_idx++;
+		}		/* (alt_idx < intf->num_altsetting) */
+#ifdef VERBOSE_USB_DEBUG
+		printk(KERN_INFO "HFC-USB: final small_match=%x alt_used=%x\n",small_match, alt_used);
+#endif
+		// yiipiee, we found a valid config
+		if (small_match != 0xffff) {
+		        //iface = iface_used;
+		        intfdesc = intfdesc_used;
+
+			if (!(context = kmalloc(sizeof(hfcusb_data), GFP_KERNEL)))
+				return(NULL);  /* got no mem */
+			memset(context, 0, sizeof(hfcusb_data));	/* clear the structure */
+
+			ep = intfdesc->endpoint;	/* first endpoint descriptor */
+			vcf = validconf[small_match];
+
+			for (i = 0; i < intfdesc->bNumEndpoints; i++) {
+				ep_addr = ep->bEndpointAddress;
+				idx = ((ep_addr & 0x7f)-1)*2;	/* get endpoint base */
+				if (ep_addr & 0x80)
+					idx++;
+				cidx = idx & 7;
+				attr = ep->bmAttributes;
+
+				// only initialize used endpoints
+				if (vcf[idx] != EP_NOP && vcf[idx] != EP_NUL) {
+					switch (attr) {
+						case USB_ENDPOINT_XFER_INT:
+							context->fifos[cidx].pipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
+							context->fifos[cidx].usb_transfer_mode = USB_INT;
+							packet_size = ep->wMaxPacketSize; // remember max packet size
+#ifdef VERBOSE_USB_DEBUG
+							printk (KERN_INFO "HFC-USB: Interrupt-In Endpoint found %d ms(idx:%d cidx:%d)!\n",
+								ep->bInterval, idx, cidx);
+#endif
+							break;
+						case USB_ENDPOINT_XFER_BULK:
+							if (ep_addr & 0x80)
+								context->fifos[cidx].pipe = usb_rcvbulkpipe(dev, ep->bEndpointAddress);
+							else
+								context->fifos[cidx].pipe = usb_sndbulkpipe(dev, ep->bEndpointAddress);
+							context->fifos[cidx].usb_transfer_mode = USB_BULK;
+							packet_size = ep->wMaxPacketSize; // remember max packet size
+#ifdef VERBOSE_USB_DEBUG
+							printk (KERN_INFO "HFC-USB: Bulk Endpoint found (idx:%d cidx:%d)!\n",
+								idx, cidx);
+#endif
+							break;
+						case USB_ENDPOINT_XFER_ISOC:
+							if (ep_addr & 0x80)
+								context->fifos[cidx].pipe = usb_rcvisocpipe(dev, ep->bEndpointAddress);
+							else
+								context->fifos[cidx].pipe = usb_sndisocpipe(dev, ep->bEndpointAddress);
+							context->fifos[cidx].usb_transfer_mode = USB_ISOC;
+							iso_packet_size = ep->wMaxPacketSize; // remember max packet size
+#ifdef VERBOSE_USB_DEBUG
+							printk (KERN_INFO "HFC-USB: ISO Endpoint found (idx:%d cidx:%d)!\n",
+								idx, cidx);
+#endif
+							break;
+						default:
+							context->fifos[cidx].pipe = 0;	/* reset data */
+					}	/* switch attribute */
+
+					if (context->fifos[cidx].pipe) {
+						context->fifos[cidx].fifonum = cidx;
+						context->fifos[cidx].hfc = context;
+						context->fifos[cidx].usb_packet_maxlen = ep->wMaxPacketSize;
+						context->fifos[cidx].intervall = ep->bInterval;
+						context->fifos[cidx].skbuff = NULL;
+#ifdef VERBOSE_USB_DEBUG
+						printk (KERN_INFO "HFC-USB: fifo%d pktlen %d interval %d\n",
+							context->fifos[cidx].fifonum,
+							context->fifos[cidx].usb_packet_maxlen,
+							context->fifos[cidx].intervall);
+#endif
+					}
+				}
+
+				ep++;
+			}
+
+			// now share our luck
+			context->dev = dev;						/* save device */
+			context->if_used = ifnum;					/* save used interface */
+			context->alt_used = alt_used;					/* and alternate config */
+			context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;	/* control size */
+			context->cfg_used=vcf[16];					// store used config
+			context->vend_idx=vend_idx;					// store found vendor
+			context->packet_size=packet_size;
+			context->iso_packet_size=iso_packet_size;
+
+			/* create the control pipes needed for register access */
+			context->ctrl_in_pipe = usb_rcvctrlpipe(context->dev, 0);
+			context->ctrl_out_pipe = usb_sndctrlpipe(context->dev, 0);
+			context->ctrl_urb = usb_alloc_urb(0);
+
+			printk(KERN_INFO "HFC-USB: detected \"%s\" configuration: %s (if=%d alt=%d)\n",
+				vdata[vend_idx].vend_name, conf_str[small_match], context->if_used, context->alt_used);
+
+			/* init the chip and register the driver */
+			if (usb_init(context))
+			{
+				if (context->ctrl_urb) {
+					usb_unlink_urb(context->ctrl_urb);
+					usb_free_urb(context->ctrl_urb);
+					context->ctrl_urb = NULL;
+				}
+				kfree(context);
+				return(NULL);
+			}
+			//usb_set_intfdata(intf, context);
+			//intf->private_data = context;
+			return(context);
+		} 
+	}
+	return(NULL);
+}
 
 /****************************************************/
 /* function called when an active device is removed */
 /****************************************************/
-static void
-hfc_usb_disconnect(struct usb_device *usbdev, void *drv_context)
+//static void hfc_usb_disconnect(struct usb_interface *intf)
+static void hfc_usb_disconnect(struct usb_device *usbdev, void* drv_context)
 {
-	hfcusb_data *context = drv_context;
+        //hfcusb_data *context = intf->private_data;
+        hfcusb_data* context = drv_context;
 	int i;
-	struct sk_buff *skb;
 
-	/* tell all fifos to terminate */
-	for (i = 0; i < HFCUSB_NUM_FIFOS; i++)
-		if (context->fifos[i].active) {
-			context->fifos[i].active = 0;
-			usb_unlink_urb(&context->fifos[i].urb);
-		}
-	while (context->active_fifos) {
-		set_current_state(TASK_INTERRUPTIBLE);
-		/* Timeout 10ms */
-		schedule_timeout((10 * HZ) / 1000);
-	}
+	printk(KERN_INFO "HFC-USB: device disconnect\n");
+	
+	//intf->private_data = NULL;
+	if (!context)
+		return;
 	if (timer_pending(&context->t3_timer))
 		del_timer(&context->t3_timer);
-	context->regd.release_driver(context->regd.arg_hisax);
-	while ((skb = skb_dequeue(&context->regd.erq)) != NULL)
-		dev_kfree_skb_any(skb);
+	if (timer_pending(&context->t4_timer))
+		del_timer(&context->t4_timer);
+	if (timer_pending(&context->led_timer))
+		del_timer(&context->led_timer);
+
+	hisax_unregister(&context->d_if);
 
+	/* tell all fifos to terminate */
+	for(i = 0; i < HFCUSB_NUM_FIFOS; i++) {
+		if(context->fifos[i].usb_transfer_mode == USB_ISOC) {
+			if(context->fifos[i].active > 0) {
+	    			stop_isoc_chain(&context->fifos[i]);
+#ifdef VERBOSE_USB_DEBUG
+		    		printk (KERN_INFO "HFC-USB: hfc_usb_disconnect: stopping ISOC chain Fifo no %i\n", i);
+#endif
+ 			}
+		} else {
+			if(context->fifos[i].active > 0) {
+				context->fifos[i].active = 0;
+#ifdef VERBOSE_USB_DEBUG
+				printk (KERN_INFO "HFC-USB: hfc_usb_disconnect: unlinking URB for Fifo no %i\n", i);
+#endif
+			}
+			if (context->fifos[i].urb) {
+				usb_unlink_urb(context->fifos[i].urb);
+				usb_free_urb(context->fifos[i].urb);
+				context->fifos[i].urb = NULL;
+			}
+		}
+		context->fifos[i].active = 0;
+	}
+	if (context->ctrl_urb) {
+		usb_unlink_urb(context->ctrl_urb);
+		usb_free_urb(context->ctrl_urb);
+		context->ctrl_urb = NULL;
+	}
 	kfree(context);		/* free our structure again */
-	MOD_DEC_USE_COUNT;	/* and decrement the usage counter */
 }				/* hfc_usb_disconnect */
 
+
 /************************************/
 /* our driver information structure */
 /************************************/
 static struct usb_driver hfc_drv = {
 	name:"hfc_usb",
-#ifdef COMPAT_HAS_USB_IDTAB
 	id_table:hfc_usb_idtab,
-#endif
 	probe:hfc_usb_probe,
 	disconnect:hfc_usb_disconnect,
 };
 
-static void __exit
-hfc_usb_exit(void)
-{
 
+static void __exit hfc_usb_exit(void)
+{
+#ifdef VERBOSE_USB_DEBUG
+	printk ("HFC-USB: calling \"hfc_usb_exit\" ...\n");
+#endif
 	usb_deregister(&hfc_drv);	/* release our driver */
 	printk(KERN_INFO "HFC-USB module removed\n");
 }
 
-static int __init
-hfc_usb_init(void)
+static int __init hfc_usb_init(void)
 {
-	struct hisax_drvreg drv;
+	printk ("HFC-USB: driver module revision %s loaded\n", hfcusb_revision);
 
-	drv.version = HISAX_LOAD_VERSION;	/* set our version */
-	drv.cmd = HISAX_LOAD_CHKVER;	/* check command only */
-	if (hisax_register_hfcusb(&drv)) {
-		printk(KERN_INFO "HFC-USB <-> hisax version conflict\n");
-		return (-1);	/* unable to register */
-	}
-	if (usb_register(&hfc_drv)) {
-		printk(KERN_INFO
-		       "Unable to register HFC-USB module at usb stack\n");
-		return (-1);	/* unable to register */
+	if(usb_register(&hfc_drv))
+	{
+		printk(KERN_INFO "HFC-USB: Unable to register HFC-USB module at usb stack\n");
+		return(-1);		   /* unable to register */
 	}
-
-	printk(KERN_INFO "HFC-USB module loaded\n");
-	return (0);
+	return(0);
 }
 
+
+
+
+
 module_init(hfc_usb_init);
 module_exit(hfc_usb_exit);
+