summaryrefslogtreecommitdiffstats
path: root/drivers/net/wan/sdladrv.c
blob: 7c2cf2e76300c4f7fce69777653da0742bfdb8d7 (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
/*****************************************************************************
* sdladrv.c	SDLA Support Module.  Main module.
*
*		This module is a library of common hardware-specific functions
*		used by all Sangoma drivers.
*
* Author:	Gideon Hack	
*
* Copyright:	(c) 1995-2000 Sangoma Technologies Inc.
*
*		This program is free software; you can redistribute it and/or
*		modify it under the terms of the GNU General Public License
*		as published by the Free Software Foundation; either version
*		2 of the License, or (at your option) any later version.
* ============================================================================
* Mar 20, 2001  Nenad Corbic	Added the auto_pci_cfg filed, to support
*                               the PCISLOT #0. 
* Apr 04, 2000  Nenad Corbic	Fixed the auto memory detection code.
*                               The memory test at address 0xC8000.
* Mar 09, 2000  Nenad Corbic 	Added Gideon's Bug Fix: clear pci
*                               interrupt flags on initial load.
* Jun 02, 1999  Gideon Hack     Added support for the S514 adapter.
*				Updates for Linux 2.2.X kernels.	
* Sep 17, 1998	Jaspreet Singh	Updates for linux 2.2.X kernels
* Dec 20, 1996	Gene Kozin	Version 3.0.0. Complete overhaul.
* Jul 12, 1996	Gene Kozin	Changes for Linux 2.0 compatibility.
* Jun 12, 1996	Gene Kozin 	Added support for S503 card.
* Apr 30, 1996	Gene Kozin	SDLA hardware interrupt is acknowledged before
*				calling protocolspecific ISR.
*				Register I/O ports with Linux kernel.
*				Miscellaneous bug fixes.
* Dec 20, 1995	Gene Kozin	Fixed a bug in interrupt routine.
* Oct 14, 1995	Gene Kozin	Initial version.
*****************************************************************************/

/*****************************************************************************
 * Notes:
 * ------
 * 1. This code is ment to be system-independent (as much as possible).  To
 *    achive this, various macros are used to hide system-specific interfaces.
 *    To compile this code, one of the following constants must be defined:
 *
 *	Platform	Define
 *	--------	------
 *	Linux		_LINUX_
 *	SCO Unix	_SCO_UNIX_
 *
 * 2. Supported adapter types:
 *
 *	S502A
 *	ES502A (S502E)
 *	S503
 *	S507
 *	S508 (S509)
 *
 * 3. S502A Notes:
 *
 *	There is no separate DPM window enable/disable control in S502A.  It
 *	opens immediately after a window number it written to the HMCR
 *	register.  To close the window, HMCR has to be written a value
 *	????1111b (e.g. 0x0F or 0xFF).
 *
 *	S502A DPM window cannot be located at offset E000 (e.g. 0xAE000).
 *
 *	There should be a delay of ??? before reading back S502A status
 *	register.
 *
 * 4. S502E Notes:
 *
 *	S502E has a h/w bug: although default IRQ line state is HIGH, enabling
 *	interrupts by setting bit 1 of the control register (BASE) to '1'
 *	causes it to go LOW! Therefore, disabling interrupts by setting that
 *	bit to '0' causes low-to-high transition on IRQ line (ghosty
 *	interrupt). The same occurs when disabling CPU by resetting bit 0 of
 *	CPU control register (BASE+3) - see the next note.
 *
 *	S502E CPU and DPM control is limited:
 *
 *	o CPU cannot be stopped independently. Resetting bit 0 of the CPUi
 *	  control register (BASE+3) shuts the board down entirely, including
 *	  DPM;
 *
 *	o DPM access cannot be controlled dynamically. Ones CPU is started,
 *	  bit 1 of the control register (BASE) is used to enable/disable IRQ,
 *	  so that access to shared memory cannot be disabled while CPU is
 *	  running.
 ****************************************************************************/

#define	_LINUX_

#if	defined(_LINUX_)	/****** Linux *******************************/

#include <linux/config.h>
#include <linux/kernel.h>	/* printk(), and other useful stuff */
#include <linux/stddef.h>	/* offsetof(), etc. */
#include <linux/errno.h>	/* return codes */
#include <linux/string.h>	/* inline memset(), etc. */
#include <linux/module.h>	/* support for loadable modules */
#include <linux/jiffies.h>	/* for jiffies, HZ, etc. */
#include <linux/sdladrv.h>	/* API definitions */
#include <linux/sdlasfm.h>	/* SDLA firmware module definitions */
#include <linux/sdlapci.h>	/* SDLA PCI hardware definitions */
#include <linux/pci.h>		/* PCI defines and function prototypes */
#include <asm/io.h>		/* for inb(), outb(), etc. */

#define _INB(port)		(inb(port))
#define _OUTB(port, byte)	(outb((byte),(port)))
#define	SYSTEM_TICK		jiffies

#include <linux/init.h>


#elif	defined(_SCO_UNIX_)	/****** SCO Unix ****************************/

#if	!defined(INKERNEL)
#error	This code MUST be compiled in kernel mode!
#endif
#include <sys/sdladrv.h>	/* API definitions */
#include <sys/sdlasfm.h>	/* SDLA firmware module definitions */
#include <sys/inline.h>		/* for inb(), outb(), etc. */
#define _INB(port)		(inb(port))
#define _OUTB(port, byte)	(outb((port),(byte)))
#define	SYSTEM_TICK		lbolt

#else
#error	Unknown system type!
#endif

#define	MOD_VERSION	3
#define	MOD_RELEASE	0

#define	SDLA_IODELAY	100	/* I/O Rd/Wr delay, 10 works for 486DX2-66 */
#define	EXEC_DELAY	20	/* shared memory access delay, mks */
#define	EXEC_TIMEOUT	(HZ*2)	/* command timeout, in ticks */

/* I/O port address range */
#define S502A_IORANGE	3
#define S502E_IORANGE	4
#define S503_IORANGE	3
#define S507_IORANGE	4
#define S508_IORANGE	4

/* Maximum amount of memory */
#define S502_MAXMEM	0x10000L
#define S503_MAXMEM	0x10000L
#define S507_MAXMEM	0x40000L
#define S508_MAXMEM	0x40000L

/* Minimum amount of memory */
#define S502_MINMEM	0x8000L
#define S503_MINMEM	0x8000L
#define S507_MINMEM	0x20000L
#define S508_MINMEM	0x20000L
#define NO_PORT         -1





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

/* Hardware-specific functions */
static int sdla_detect	(sdlahw_t* hw);
static int sdla_autodpm	(sdlahw_t* hw);
static int sdla_setdpm	(sdlahw_t* hw);
static int sdla_load	(sdlahw_t* hw, sfm_t* sfm, unsigned len);
static int sdla_init	(sdlahw_t* hw);
static unsigned long sdla_memtest (sdlahw_t* hw);
static int sdla_bootcfg	(sdlahw_t* hw, sfm_info_t* sfminfo);
static unsigned char make_config_byte (sdlahw_t* hw);
static int sdla_start	(sdlahw_t* hw, unsigned addr);

static int init_s502a	(sdlahw_t* hw);
static int init_s502e	(sdlahw_t* hw);
static int init_s503	(sdlahw_t* hw);
static int init_s507	(sdlahw_t* hw);
static int init_s508	(sdlahw_t* hw);
            
static int detect_s502a	(int port);
static int detect_s502e	(int port);
static int detect_s503	(int port);
static int detect_s507	(int port);
static int detect_s508	(int port);
static int detect_s514  (sdlahw_t* hw);
static int find_s514_adapter(sdlahw_t* hw, char find_first_S514_card);

/* Miscellaneous functions */
static void peek_by_4 (unsigned long src, void* buf, unsigned len);
static void poke_by_4 (unsigned long dest, void* buf, unsigned len);
static int calibrate_delay (int mks);
static int get_option_index (unsigned* optlist, unsigned optval);
static unsigned check_memregion (void* ptr, unsigned len);
static unsigned	test_memregion (void* ptr, unsigned len);
static unsigned short checksum (unsigned char* buf, unsigned len);
static int init_pci_slot(sdlahw_t *);

static int pci_probe(sdlahw_t *hw);

/****** Global Data **********************************************************
 * Note: All data must be explicitly initialized!!!
 */

static struct pci_device_id sdladrv_pci_tbl[] = {
	{ V3_VENDOR_ID, V3_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, },
	{ }			/* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, sdladrv_pci_tbl);

MODULE_LICENSE("GPL");

/* private data */
static char modname[]	= "sdladrv";
static char fullname[]	= "SDLA Support Module";
static char copyright[]	= "(c) 1995-1999 Sangoma Technologies Inc.";
static unsigned	exec_idle;

/* Hardware configuration options.
 * These are arrays of configuration options used by verification routines.
 * The first element of each array is its size (i.e. number of options).
 */
static unsigned	s502_port_options[] =
	{ 4, 0x250, 0x300, 0x350, 0x360 }
;
static unsigned	s503_port_options[] =
	{ 8, 0x250, 0x254, 0x300, 0x304, 0x350, 0x354, 0x360, 0x364 }
;
static unsigned	s508_port_options[] =
	{ 8, 0x250, 0x270, 0x280, 0x300, 0x350, 0x360, 0x380, 0x390 }
;

static unsigned s502a_irq_options[] = { 0 };
static unsigned s502e_irq_options[] = { 4, 2, 3, 5, 7 };
static unsigned s503_irq_options[]  = { 5, 2, 3, 4, 5, 7 };
static unsigned s508_irq_options[]  = { 8, 3, 4, 5, 7, 10, 11, 12, 15 };

static unsigned s502a_dpmbase_options[] =
{
	28,
	0xA0000, 0xA2000, 0xA4000, 0xA6000, 0xA8000, 0xAA000, 0xAC000,
	0xC0000, 0xC2000, 0xC4000, 0xC6000, 0xC8000, 0xCA000, 0xCC000,
	0xD0000, 0xD2000, 0xD4000, 0xD6000, 0xD8000, 0xDA000, 0xDC000,
	0xE0000, 0xE2000, 0xE4000, 0xE6000, 0xE8000, 0xEA000, 0xEC000,
};
static unsigned s507_dpmbase_options[] =
{
	32,
	0xA0000, 0xA2000, 0xA4000, 0xA6000, 0xA8000, 0xAA000, 0xAC000, 0xAE000,
	0xB0000, 0xB2000, 0xB4000, 0xB6000, 0xB8000, 0xBA000, 0xBC000, 0xBE000,
	0xC0000, 0xC2000, 0xC4000, 0xC6000, 0xC8000, 0xCA000, 0xCC000, 0xCE000,
	0xE0000, 0xE2000, 0xE4000, 0xE6000, 0xE8000, 0xEA000, 0xEC000, 0xEE000,
};
static unsigned s508_dpmbase_options[] =	/* incl. S502E and S503 */
{
	32,
	0xA0000, 0xA2000, 0xA4000, 0xA6000, 0xA8000, 0xAA000, 0xAC000, 0xAE000,
	0xC0000, 0xC2000, 0xC4000, 0xC6000, 0xC8000, 0xCA000, 0xCC000, 0xCE000,
	0xD0000, 0xD2000, 0xD4000, 0xD6000, 0xD8000, 0xDA000, 0xDC000, 0xDE000,
	0xE0000, 0xE2000, 0xE4000, 0xE6000, 0xE8000, 0xEA000, 0xEC000, 0xEE000,
};

/*
static unsigned	s502_dpmsize_options[] = { 2, 0x2000, 0x10000 };
static unsigned	s507_dpmsize_options[] = { 2, 0x2000, 0x4000 };
static unsigned	s508_dpmsize_options[] = { 1, 0x2000 };
*/

static unsigned	s502a_pclk_options[] = { 2, 3600, 7200 };
static unsigned	s502e_pclk_options[] = { 5, 3600, 5000, 7200, 8000, 10000 };
static unsigned	s503_pclk_options[]  = { 3, 7200, 8000, 10000 };
static unsigned	s507_pclk_options[]  = { 1, 12288 };
static unsigned	s508_pclk_options[]  = { 1, 16000 };

/* Host memory control register masks */
static unsigned char s502a_hmcr[] =
{
	0x10, 0x12, 0x14, 0x16, 0x18, 0x1A, 0x1C,	/* A0000 - AC000 */
	0x20, 0x22, 0x24, 0x26, 0x28, 0x2A, 0x2C,	/* C0000 - CC000 */
	0x00, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C,	/* D0000 - DC000 */
	0x30, 0x32, 0x34, 0x36, 0x38, 0x3A, 0x3C,	/* E0000 - EC000 */
};
static unsigned char s502e_hmcr[] =
{
	0x10, 0x12, 0x14, 0x16, 0x18, 0x1A, 0x1C, 0x1E,	/* A0000 - AE000 */
	0x20, 0x22, 0x24, 0x26, 0x28, 0x2A, 0x2C, 0x2E,	/* C0000 - CE000 */
	0x00, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C, 0x0E,	/* D0000 - DE000 */
	0x30, 0x32, 0x34, 0x36, 0x38, 0x3A, 0x3C, 0x3E,	/* E0000 - EE000 */
};
static unsigned char s507_hmcr[] =
{
	0x00, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C, 0x0E,	/* A0000 - AE000 */
	0x40, 0x42, 0x44, 0x46, 0x48, 0x4A, 0x4C, 0x4E,	/* B0000 - BE000 */
	0x80, 0x82, 0x84, 0x86, 0x88, 0x8A, 0x8C, 0x8E,	/* C0000 - CE000 */
	0xC0, 0xC2, 0xC4, 0xC6, 0xC8, 0xCA, 0xCC, 0xCE,	/* E0000 - EE000 */
};
static unsigned char s508_hmcr[] =
{
	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,	/* A0000 - AE000 */
	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,	/* C0000 - CE000 */
	0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,	/* D0000 - DE000 */
	0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,	/* E0000 - EE000 */
};

static unsigned char s507_irqmask[] =
{
	0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xE0
};

static int pci_slot_ar[MAX_S514_CARDS];

/******* Kernel Loadable Module Entry Points ********************************/

/*============================================================================
 * Module 'insert' entry point.
 * o print announcement
 * o initialize static data
 * o calibrate SDLA shared memory access delay.
 *
 * Return:	0	Ok
 *		< 0	error.
 * Context:	process
 */

static int __init sdladrv_init(void)
{
	int i=0;

	printk(KERN_INFO "%s v%u.%u %s\n",
		fullname, MOD_VERSION, MOD_RELEASE, copyright);
	exec_idle = calibrate_delay(EXEC_DELAY);
#ifdef WANDEBUG	
	printk(KERN_DEBUG "%s: exec_idle = %d\n", modname, exec_idle);
#endif	

	/* Initialize the PCI Card array, which
         * will store flags, used to mark 
         * card initialization state */
	for (i=0; i<MAX_S514_CARDS; i++)
		pci_slot_ar[i] = 0xFF;

	return 0;
}

/*============================================================================
 * Module 'remove' entry point.
 * o release all remaining system resources
 */
static void __exit sdladrv_cleanup(void)
{
}

module_init(sdladrv_init);
module_exit(sdladrv_cleanup);

/******* Kernel APIs ********************************************************/

/*============================================================================
 * Set up adapter.
 * o detect adapter type
 * o verify hardware configuration options
 * o check for hardware conflicts
 * o set up adapter shared memory
 * o test adapter memory
 * o load firmware
 * Return:	0	ok.
 *		< 0	error
 */

EXPORT_SYMBOL(sdla_setup);

int sdla_setup (sdlahw_t* hw, void* sfm, unsigned len)
{
	unsigned* irq_opt	= NULL;	/* IRQ options */
	unsigned* dpmbase_opt	= NULL;	/* DPM window base options */
	unsigned* pclk_opt	= NULL;	/* CPU clock rate options */
	int err=0;

	if (sdla_detect(hw)) {
                if(hw->type != SDLA_S514)
                        printk(KERN_INFO "%s: no SDLA card found at port 0x%X\n",
                        modname, hw->port);
		return -EINVAL;
	}

	if(hw->type != SDLA_S514) {
                printk(KERN_INFO "%s: found S%04u card at port 0x%X.\n",
                modname, hw->type, hw->port);

                hw->dpmsize = SDLA_WINDOWSIZE;
                switch (hw->type) {
                case SDLA_S502A:
                        hw->io_range    = S502A_IORANGE;
                        irq_opt         = s502a_irq_options;
                        dpmbase_opt     = s502a_dpmbase_options;
                        pclk_opt        = s502a_pclk_options;
                        break;

                case SDLA_S502E:
                        hw->io_range    = S502E_IORANGE;
                        irq_opt         = s502e_irq_options;
                        dpmbase_opt     = s508_dpmbase_options;
                        pclk_opt        = s502e_pclk_options;
                        break;

                case SDLA_S503:
                        hw->io_range    = S503_IORANGE;
                        irq_opt         = s503_irq_options;
                        dpmbase_opt     = s508_dpmbase_options;
                        pclk_opt        = s503_pclk_options;
                        break;

                case SDLA_S507:
                        hw->io_range    = S507_IORANGE;
                        irq_opt         = s508_irq_options;
                        dpmbase_opt     = s507_dpmbase_options;
                        pclk_opt        = s507_pclk_options;
                        break;

                case SDLA_S508:
                        hw->io_range    = S508_IORANGE;
                        irq_opt         = s508_irq_options;
                        dpmbase_opt     = s508_dpmbase_options;
                        pclk_opt        = s508_pclk_options;
                        break;
                }

                /* Verify IRQ configuration options */
                if (!get_option_index(irq_opt, hw->irq)) {
                        printk(KERN_INFO "%s: IRQ %d is invalid!\n",
                        	modname, hw->irq);
                      return -EINVAL;
                } 

                /* Verify CPU clock rate configuration options */
                if (hw->pclk == 0)
                        hw->pclk = pclk_opt[1];  /* use default */
        
                else if (!get_option_index(pclk_opt, hw->pclk)) {
                        printk(KERN_INFO "%s: CPU clock %u is invalid!\n",
				modname, hw->pclk);
                        return -EINVAL;
                } 
                printk(KERN_INFO "%s: assuming CPU clock rate of %u kHz.\n",
			modname, hw->pclk);

                /* Setup adapter dual-port memory window and test memory */
                if (hw->dpmbase == 0) {
                        err = sdla_autodpm(hw);
                        if (err) {
                                printk(KERN_INFO
				"%s: can't find available memory region!\n",
					modname);
                                return err;
                        }
                }
                else if (!get_option_index(dpmbase_opt,
			virt_to_phys(hw->dpmbase))) {
                        printk(KERN_INFO
				"%s: memory address 0x%lX is invalid!\n",
				modname, virt_to_phys(hw->dpmbase));
                        return -EINVAL;
                }               
                else if (sdla_setdpm(hw)) {
                        printk(KERN_INFO
			"%s: 8K memory region at 0x%lX is not available!\n",
				modname, virt_to_phys(hw->dpmbase));
                        return -EINVAL;
                } 
                printk(KERN_INFO
			"%s: dual-port memory window is set at 0x%lX.\n",
				modname, virt_to_phys(hw->dpmbase));


		/* If we find memory in 0xE**** Memory region, 
                 * warn the user to disable the SHADOW RAM.  
                 * Since memory corruption can occur if SHADOW is
                 * enabled. This can causes random crashes ! */
		if (virt_to_phys(hw->dpmbase) >= 0xE0000){
			printk(KERN_WARNING "\n%s: !!!!!!!!  WARNING !!!!!!!!\n",modname);
			printk(KERN_WARNING "%s: WANPIPE is using 0x%lX memory region !!!\n",
						modname, virt_to_phys(hw->dpmbase));
			printk(KERN_WARNING "         Please disable the SHADOW RAM, otherwise\n");
			printk(KERN_WARNING "         your system might crash randomly from time to time !\n");
			printk(KERN_WARNING "%s: !!!!!!!!  WARNING !!!!!!!!\n\n",modname);
		}
        }

	else {
		hw->memory = test_memregion((void*)hw->dpmbase, 
			MAX_SIZEOF_S514_MEMORY);
		if(hw->memory < (256 * 1024)) {
			printk(KERN_INFO
				"%s: error in testing S514 memory (0x%lX)\n",
				modname, hw->memory);
			sdla_down(hw);
			return -EINVAL;
		}
	}
    
	printk(KERN_INFO "%s: found %luK bytes of on-board memory\n",
		modname, hw->memory / 1024);

	/* Load firmware. If loader fails then shut down adapter */
	err = sdla_load(hw, sfm, len);
	if (err) sdla_down(hw);		/* shutdown adapter */

	return err;
} 

/*============================================================================
 * Shut down SDLA: disable shared memory access and interrupts, stop CPU, etc.
 */

EXPORT_SYMBOL(sdla_down);

int sdla_down (sdlahw_t* hw)
{
	unsigned port = hw->port;
	int i;
        unsigned char CPU_no;
        u32 int_config, int_status;

        if(!port && (hw->type != SDLA_S514))
                return -EFAULT;

	switch (hw->type) {
	case SDLA_S502A:
		_OUTB(port, 0x08);		/* halt CPU */
		_OUTB(port, 0x08);
		_OUTB(port, 0x08);
		hw->regs[0] = 0x08;
		_OUTB(port + 1, 0xFF);		/* close memory window */
		hw->regs[1] = 0xFF;
		break;

	case SDLA_S502E:
		_OUTB(port + 3, 0);		/* stop CPU */
		_OUTB(port, 0);			/* reset board */
		for (i = 0; i < S502E_IORANGE; ++i)
			hw->regs[i] = 0
		;
		break;

	case SDLA_S503:
	case SDLA_S507:
	case SDLA_S508:
		_OUTB(port, 0);			/* reset board logic */
		hw->regs[0] = 0;
		break;

	case SDLA_S514:
		/* halt the adapter */
                *(char *)hw->vector = S514_CPU_HALT;
        	CPU_no = hw->S514_cpu_no[0];

		/* disable the PCI IRQ and disable memory access */
                pci_read_config_dword(hw->pci_dev, PCI_INT_CONFIG, &int_config);
	        int_config &= (CPU_no == S514_CPU_A) ? ~PCI_DISABLE_IRQ_CPU_A :	~PCI_DISABLE_IRQ_CPU_B;
                pci_write_config_dword(hw->pci_dev, PCI_INT_CONFIG, int_config);
		read_S514_int_stat(hw, &int_status);
		S514_intack(hw, int_status);
		if(CPU_no == S514_CPU_A)
                        pci_write_config_dword(hw->pci_dev, PCI_MAP0_DWORD,
				PCI_CPU_A_MEM_DISABLE);
		else
                        pci_write_config_dword(hw->pci_dev, PCI_MAP1_DWORD,
				PCI_CPU_B_MEM_DISABLE);

		/* free up the allocated virtual memory */
 		iounmap((void *)hw->dpmbase);
        	iounmap((void *)hw->vector);
 		break;


	default:
		return -EINVAL;
	}
	return 0;
}

/*============================================================================
 * Map shared memory window into SDLA address space.
 */

EXPORT_SYMBOL(sdla_mapmem);

int sdla_mapmem (sdlahw_t* hw, unsigned long addr)
{
	unsigned port = hw->port;
	register int tmp;

	switch (hw->type) {
	case SDLA_S502A:
	case SDLA_S502E:
		if (addr < S502_MAXMEM)	{ /* verify parameter */
			tmp = addr >> 13;	/* convert to register mask */
			_OUTB(port + 2, tmp);
			hw->regs[2] = tmp;
		}
		else return -EINVAL;
		break;

	case SDLA_S503:
		if (addr < S503_MAXMEM)	{ /* verify parameter */
			tmp = (hw->regs[0] & 0x8F) | ((addr >> 9) & 0x70);
			_OUTB(port, tmp);
			hw->regs[0] = tmp;
		}
		else return -EINVAL;
		break;

	case SDLA_S507:
		if (addr < S507_MAXMEM) {
			if (!(_INB(port) & 0x02))
				return -EIO;
			tmp = addr >> 13;	/* convert to register mask */
			_OUTB(port + 2, tmp);
			hw->regs[2] = tmp;
		}
		else return -EINVAL;
		break;

	case SDLA_S508:
		if (addr < S508_MAXMEM) {
			tmp = addr >> 13;	/* convert to register mask */
			_OUTB(port + 2, tmp);
			hw->regs[2] = tmp;
		}
		else return -EINVAL;
		break;

	case SDLA_S514:
		return 0;

 	default:
		return -EINVAL;
	}
	hw->vector = addr & 0xFFFFE000L;
	return 0;
}

/*============================================================================
 * Enable interrupt generation.
 */

static int sdla_inten (sdlahw_t* hw)
{
	unsigned port = hw->port;
	int tmp, i;

	switch (hw->type) {
	case SDLA_S502E:
		/* Note thar interrupt control operations on S502E are allowed
		 * only if CPU is enabled (bit 0 of status register is set).
		 */
		if (_INB(port) & 0x01) {
			_OUTB(port, 0x02);	/* bit1 = 1, bit2 = 0 */
			_OUTB(port, 0x06);	/* bit1 = 1, bit2 = 1 */
			hw->regs[0] = 0x06;
		}
		else return -EIO;
		break;

	case SDLA_S503:
		tmp = hw->regs[0] | 0x04;
		_OUTB(port, tmp);
		hw->regs[0] = tmp;		/* update mirror */
		for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
		if (!(_INB(port) & 0x02))		/* verify */
			return -EIO;
		break;

	case SDLA_S508:
		tmp = hw->regs[0] | 0x10;
		_OUTB(port, tmp);
		hw->regs[0] = tmp;		/* update mirror */
		for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
		if (!(_INB(port + 1) & 0x10))		/* verify */
			return -EIO;
		break;

	case SDLA_S502A:
	case SDLA_S507:
		break;

        case SDLA_S514:
                break;

	default:
		return -EINVAL;

	}
	return 0;
}

/*============================================================================
 * Disable interrupt generation.
 */

#if 0
int sdla_intde (sdlahw_t* hw)
{
	unsigned port = hw->port;
	int tmp, i;

	switch (hw->type) {
	case SDLA_S502E:
		/* Notes:
		 *  1) interrupt control operations are allowed only if CPU is
		 *     enabled (bit 0 of status register is set).
		 *  2) disabling interrupts using bit 1 of control register
		 *     causes IRQ line go high, therefore we are going to use
		 *     0x04 instead: lower it to inhibit interrupts to PC.
		 */
		if (_INB(port) & 0x01) {
			_OUTB(port, hw->regs[0] & ~0x04);
			hw->regs[0] &= ~0x04;
		}
		else return -EIO;
		break;

	case SDLA_S503:
		tmp = hw->regs[0] & ~0x04;
		_OUTB(port, tmp);
		hw->regs[0] = tmp;			/* update mirror */
		for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
		if (_INB(port) & 0x02)			/* verify */
			return -EIO;
		break;

	case SDLA_S508:
		tmp = hw->regs[0] & ~0x10;
		_OUTB(port, tmp);
		hw->regs[0] = tmp;			/* update mirror */
		for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
		if (_INB(port) & 0x10)			/* verify */
			return -EIO;
		break;

	case SDLA_S502A:
	case SDLA_S507:
		break;

	default:
		return -EINVAL;
	}
	return 0;
}
#endif  /*  0  */

/*============================================================================
 * Acknowledge SDLA hardware interrupt.
 */

static int sdla_intack (sdlahw_t* hw)
{
	unsigned port = hw->port;
	int tmp;

	switch (hw->type) {
	case SDLA_S502E:
		/* To acknoledge hardware interrupt we have to toggle bit 3 of
		 * control register: \_/
		 * Note that interrupt control operations on S502E are allowed
		 * only if CPU is enabled (bit 1 of status register is set).
		 */
		if (_INB(port) & 0x01) {
			tmp = hw->regs[0] & ~0x04;
			_OUTB(port, tmp);
			tmp |= 0x04;
			_OUTB(port, tmp);
			hw->regs[0] = tmp;
		}
		else return -EIO;
		break;

	case SDLA_S503:
		if (_INB(port) & 0x04) {
			tmp = hw->regs[0] & ~0x08;
			_OUTB(port, tmp);
			tmp |= 0x08;
			_OUTB(port, tmp);
			hw->regs[0] = tmp;
		}
		break;

	case SDLA_S502A:
	case SDLA_S507:
	case SDLA_S508:
	break;

	default:
		return -EINVAL;
	}
	return 0;
}


/*============================================================================
 * Acknowledge S514 hardware interrupt.
 */

EXPORT_SYMBOL(S514_intack);

void S514_intack (sdlahw_t* hw, u32 int_status)
{
        pci_write_config_dword(hw->pci_dev, PCI_INT_STATUS, int_status);
}


/*============================================================================
 * Read the S514 hardware interrupt status.
 */

EXPORT_SYMBOL(read_S514_int_stat);

void read_S514_int_stat (sdlahw_t* hw, u32* int_status)
{
	pci_read_config_dword(hw->pci_dev, PCI_INT_STATUS, int_status);
}


/*============================================================================
 * Generate an interrupt to adapter's CPU.
 */

#if 0
int sdla_intr (sdlahw_t* hw)
{
	unsigned port = hw->port;

	switch (hw->type) {
	case SDLA_S502A:
		if (!(_INB(port) & 0x40)) {
			_OUTB(port, 0x10);		/* issue NMI to CPU */
			hw->regs[0] = 0x10;
		}
		else return -EIO;
		break;

	case SDLA_S507:
		if ((_INB(port) & 0x06) == 0x06) {
			_OUTB(port + 3, 0);
		}
		else return -EIO;
		break;

	case SDLA_S508:
		if (_INB(port + 1) & 0x02) {
			_OUTB(port, 0x08);
		}
		else return -EIO;
		break;

	case SDLA_S502E:
	case SDLA_S503:
	default:
		return -EINVAL;
	}
	return 0;
}
#endif  /*  0  */

/*============================================================================
 * Execute Adapter Command.
 * o Set exec flag.
 * o Busy-wait until flag is reset.
 * o Return number of loops made, or 0 if command timed out.
 */

EXPORT_SYMBOL(sdla_exec);

int sdla_exec (void* opflag)
{
	volatile unsigned char* flag = opflag;
	unsigned long tstop;
	int nloops;

	if(readb(flag) != 0x00) {
		printk(KERN_INFO
			"WANPIPE: opp flag set on entry to sdla_exec\n");
		return 0;
	}
	
	writeb(0x01, flag);

	tstop = SYSTEM_TICK + EXEC_TIMEOUT;

	for (nloops = 1; (readb(flag) == 0x01); ++ nloops) {
		unsigned delay = exec_idle;
		while (-- delay);			/* delay */
		if (SYSTEM_TICK > tstop) return 0;	/* time is up! */
	}
	return nloops;
}

/*============================================================================
 * Read absolute adapter memory.
 * Transfer data from adapter's memory to data buffer.
 *
 * Note:
 * Care should be taken when crossing dual-port memory window boundary.
 * This function is not atomic, so caller must disable interrupt if
 * interrupt routines are accessing adapter shared memory.
 */

EXPORT_SYMBOL(sdla_peek);

int sdla_peek (sdlahw_t* hw, unsigned long addr, void* buf, unsigned len)
{

	if (addr + len > hw->memory)	/* verify arguments */
		return -EINVAL;

        if(hw->type == SDLA_S514) {	/* copy data for the S514 adapter */
                peek_by_4 ((unsigned long)hw->dpmbase + addr, buf, len);
                return 0;
	}

        else {				/* copy data for the S508 adapter */
	        unsigned long oldvec = hw->vector;
        	unsigned winsize = hw->dpmsize;
	        unsigned curpos, curlen;   /* current offset and block size */
        	unsigned long curvec;      /* current DPM window vector */
	        int err = 0;

                while (len && !err) {
                        curpos = addr % winsize;  /* current window offset */
                        curvec = addr - curpos;   /* current window vector */
                        curlen = (len > (winsize - curpos)) ?
				(winsize - curpos) : len;
                        /* Relocate window and copy block of data */
                        err = sdla_mapmem(hw, curvec);
                        peek_by_4 ((unsigned long)hw->dpmbase + curpos, buf,
				curlen);
                        addr       += curlen;
                        buf         = (char*)buf + curlen;
                        len        -= curlen;
                }

                /* Restore DPM window position */
                sdla_mapmem(hw, oldvec);
                return err;
        }
}


/*============================================================================
 * Read data from adapter's memory to a data buffer in 4-byte chunks.
 * Note that we ensure that the SDLA memory address is on a 4-byte boundary
 * before we begin moving the data in 4-byte chunks.
*/

static void peek_by_4 (unsigned long src, void* buf, unsigned len)
{

        /* byte copy data until we get to a 4-byte boundary */
        while (len && (src & 0x03)) {
                *(char *)buf ++ = readb(src ++);
                len --;
        }

        /* copy data in 4-byte chunks */
        while (len >= 4) {
                *(unsigned long *)buf = readl(src);
                buf += 4;
                src += 4;
                len -= 4;
        }

        /* byte copy any remaining data */
        while (len) {
                *(char *)buf ++ = readb(src ++);
                len --;
        }
}


/*============================================================================
 * Write Absolute Adapter Memory.
 * Transfer data from data buffer to adapter's memory.
 *
 * Note:
 * Care should be taken when crossing dual-port memory window boundary.
 * This function is not atomic, so caller must disable interrupt if
 * interrupt routines are accessing adapter shared memory.
 */

EXPORT_SYMBOL(sdla_poke);
 
int sdla_poke (sdlahw_t* hw, unsigned long addr, void* buf, unsigned len)
{

	if (addr + len > hw->memory)	/* verify arguments */
		return -EINVAL;
   
        if(hw->type == SDLA_S514) {	/* copy data for the S514 adapter */
                poke_by_4 ((unsigned long)hw->dpmbase + addr, buf, len);
                return 0;
	}
	
	else {				/* copy data for the S508 adapter */
    		unsigned long oldvec = hw->vector;
	        unsigned winsize = hw->dpmsize;
        	unsigned curpos, curlen;     /* current offset and block size */
        	unsigned long curvec;        /* current DPM window vector */
        	int err = 0;

		while (len && !err) {
                        curpos = addr % winsize;    /* current window offset */
                        curvec = addr - curpos;     /* current window vector */
                        curlen = (len > (winsize - curpos)) ?
				(winsize - curpos) : len;
                        /* Relocate window and copy block of data */
                        sdla_mapmem(hw, curvec);
                        poke_by_4 ((unsigned long)hw->dpmbase + curpos, buf,
				curlen);
	                addr       += curlen;
                        buf         = (char*)buf + curlen;
                        len        -= curlen;
                }

                /* Restore DPM window position */
                sdla_mapmem(hw, oldvec);
                return err;
        }
}


/*============================================================================
 * Write from a data buffer to adapter's memory in 4-byte chunks.
 * Note that we ensure that the SDLA memory address is on a 4-byte boundary
 * before we begin moving the data in 4-byte chunks.
*/

static void poke_by_4 (unsigned long dest, void* buf, unsigned len)
{

        /* byte copy data until we get to a 4-byte boundary */
        while (len && (dest & 0x03)) {
                writeb (*(char *)buf ++, dest ++);
                len --;
        }

        /* copy data in 4-byte chunks */
        while (len >= 4) {
                writel (*(unsigned long *)buf, dest);
                dest += 4;
                buf += 4;
                len -= 4;
        }

        /* byte copy any remaining data */
        while (len) {
                writeb (*(char *)buf ++ , dest ++);
                len --;
        }
}


#ifdef	DONT_COMPIPLE_THIS
#endif	/* DONT_COMPIPLE_THIS */

/****** Hardware-Specific Functions *****************************************/

/*============================================================================
 * Detect adapter type.
 * o if adapter type is specified then call detection routine for that adapter
 *   type.  Otherwise call detection routines for every adapter types until
 *   adapter is detected.
 *
 * Notes:
 * 1) Detection tests are destructive! Adapter will be left in shutdown state
 *    after the test.
 */
static int sdla_detect (sdlahw_t* hw)
{
	unsigned port = hw->port;
	int err = 0;

	if (!port && (hw->type != SDLA_S514))
		return -EFAULT;

    	switch (hw->type) {
	case SDLA_S502A:
		if (!detect_s502a(port)) err = -ENODEV;
		break;

	case SDLA_S502E:
		if (!detect_s502e(port)) err = -ENODEV;
		break;

	case SDLA_S503:
		if (!detect_s503(port)) err = -ENODEV;
		break;

	case SDLA_S507:
		if (!detect_s507(port)) err = -ENODEV;
		break;

	case SDLA_S508:
		if (!detect_s508(port)) err = -ENODEV;
		break;

	case SDLA_S514:
                if (!detect_s514(hw)) err = -ENODEV;
		break;

	default:
		if (detect_s502a(port))
			hw->type = SDLA_S502A;
		else if (detect_s502e(port))
			hw->type = SDLA_S502E;
		else if (detect_s503(port))
			hw->type = SDLA_S503;
		else if (detect_s507(port))
			hw->type = SDLA_S507;
		else if (detect_s508(port))
			hw->type = SDLA_S508;
		else err = -ENODEV;
	}
	return err;
}

/*============================================================================
 * Autoselect memory region. 
 * o try all available DMP address options from the top down until success.
 */
static int sdla_autodpm (sdlahw_t* hw)
{
	int i, err = -EINVAL;
	unsigned* opt;

	switch (hw->type) {
	case SDLA_S502A:
		opt = s502a_dpmbase_options;
		break;

	case SDLA_S502E:
	case SDLA_S503:
	case SDLA_S508:
		opt = s508_dpmbase_options;
		break;

	case SDLA_S507:
		opt = s507_dpmbase_options;
		break;

	default:
		return -EINVAL;
	}

	/* Start testing from 8th position, address
         * 0xC8000 from the 508 address table. 
         * We don't want to test A**** addresses, since
         * they are usually used for Video */
	for (i = 8; i <= opt[0] && err; i++) {
		hw->dpmbase = phys_to_virt(opt[i]);
		err = sdla_setdpm(hw);
	}
	return err;
}

/*============================================================================
 * Set up adapter dual-port memory window. 
 * o shut down adapter
 * o make sure that no physical memory exists in this region, i.e entire
 *   region reads 0xFF and is not writable when adapter is shut down.
 * o initialize adapter hardware
 * o make sure that region is usable with SDLA card, i.e. we can write to it
 *   when adapter is configured.
 */
static int sdla_setdpm (sdlahw_t* hw)
{
	int err;

	/* Shut down card and verify memory region */
	sdla_down(hw);
	if (check_memregion(hw->dpmbase, hw->dpmsize))
		return -EINVAL;

	/* Initialize adapter and test on-board memory segment by segment.
	 * If memory size appears to be less than shared memory window size,
	 * assume that memory region is unusable.
	 */
	err = sdla_init(hw);
	if (err) return err;

	if (sdla_memtest(hw) < hw->dpmsize) {	/* less than window size */
		sdla_down(hw);
		return -EIO;
	}
	sdla_mapmem(hw, 0L);	/* set window vector at bottom */
	return 0;
}

/*============================================================================
 * Load adapter from the memory image of the SDLA firmware module. 
 * o verify firmware integrity and compatibility
 * o start adapter up
 */
static int sdla_load (sdlahw_t* hw, sfm_t* sfm, unsigned len)
{

	int i;

	/* Verify firmware signature */
	if (strcmp(sfm->signature, SFM_SIGNATURE)) {
		printk(KERN_INFO "%s: not SDLA firmware!\n",
			modname);
		return -EINVAL;
	}

	/* Verify firmware module format version */
	if (sfm->version != SFM_VERSION) {
		printk(KERN_INFO
			"%s: firmware format %u rejected! Expecting %u.\n",
			modname, sfm->version, SFM_VERSION);
		return -EINVAL;
	}

	/* Verify firmware module length and checksum */
	if ((len - offsetof(sfm_t, image) != sfm->info.codesize) ||
		(checksum((void*)&sfm->info,
		sizeof(sfm_info_t) + sfm->info.codesize) != sfm->checksum)) {
		printk(KERN_INFO "%s: firmware corrupted!\n", modname);
		return -EINVAL;
	}

	/* Announce */
	printk(KERN_INFO "%s: loading %s (ID=%u)...\n", modname,
		(sfm->descr[0] != '\0') ? sfm->descr : "unknown firmware",
		sfm->info.codeid);

	if(hw->type == SDLA_S514)
		printk(KERN_INFO "%s: loading S514 adapter, CPU %c\n",
			modname, hw->S514_cpu_no[0]);

	/* Scan through the list of compatible adapters and make sure our
	 * adapter type is listed.
	 */
	for (i = 0;
	     (i < SFM_MAX_SDLA) && (sfm->info.adapter[i] != hw->type);
	     ++i);
	
	if (i == SFM_MAX_SDLA) {
		printk(KERN_INFO "%s: firmware is not compatible with S%u!\n",
			modname, hw->type);
		return -EINVAL;
	}


	/* Make sure there is enough on-board memory */
	if (hw->memory < sfm->info.memsize) {
		printk(KERN_INFO
			"%s: firmware needs %lu bytes of on-board memory!\n",
			modname, sfm->info.memsize);
		return -EINVAL;
	}

	/* Move code onto adapter */
	if (sdla_poke(hw, sfm->info.codeoffs, sfm->image, sfm->info.codesize)) {
		printk(KERN_INFO "%s: failed to load code segment!\n",
			modname);
		return -EIO;
	}

	/* Prepare boot-time configuration data and kick-off CPU */
	sdla_bootcfg(hw, &sfm->info);
	if (sdla_start(hw, sfm->info.startoffs)) {
		printk(KERN_INFO "%s: Damn... Adapter won't start!\n",
			modname);
		return -EIO;
	}

	/* position DPM window over the mailbox and enable interrupts */
        if (sdla_mapmem(hw, sfm->info.winoffs) || sdla_inten(hw)) {
		printk(KERN_INFO "%s: adapter hardware failure!\n",
			modname);
		return -EIO;
	}
	hw->fwid = sfm->info.codeid;		/* set firmware ID */
	return 0;
}

/*============================================================================
 * Initialize SDLA hardware: setup memory window, IRQ, etc.
 */
static int sdla_init (sdlahw_t* hw)
{
	int i;

	for (i = 0; i < SDLA_MAXIORANGE; ++i)
		hw->regs[i] = 0;

	switch (hw->type) {
	case SDLA_S502A: return init_s502a(hw);
	case SDLA_S502E: return init_s502e(hw);
	case SDLA_S503:  return init_s503(hw);
	case SDLA_S507:  return init_s507(hw);
	case SDLA_S508:  return init_s508(hw);
	}
	return -EINVAL;
}

/*============================================================================
 * Test adapter on-board memory.
 * o slide DPM window from the bottom up and test adapter memory segment by
 *   segment.
 * Return adapter memory size.
 */
static unsigned long sdla_memtest (sdlahw_t* hw)
{
	unsigned long memsize;
	unsigned winsize;

	for (memsize = 0, winsize = hw->dpmsize;
	     !sdla_mapmem(hw, memsize) &&
		(test_memregion(hw->dpmbase, winsize) == winsize)
	     ;
	     memsize += winsize)
	;
	hw->memory = memsize;
	return memsize;
}

/*============================================================================
 * Prepare boot-time firmware configuration data.
 * o position DPM window
 * o initialize configuration data area
 */
static int sdla_bootcfg (sdlahw_t* hw, sfm_info_t* sfminfo)
{
	unsigned char* data;

	if (!sfminfo->datasize) return 0;	/* nothing to do */

	if (sdla_mapmem(hw, sfminfo->dataoffs) != 0)
		return -EIO;

	if(hw->type == SDLA_S514)
                data = (void*)(hw->dpmbase + sfminfo->dataoffs);
        else
                data = (void*)((u8 *)hw->dpmbase +
                        (sfminfo->dataoffs - hw->vector));

	memset_io (data, 0, sfminfo->datasize);

	writeb (make_config_byte(hw), &data[0x00]);

	switch (sfminfo->codeid) {
	case SFID_X25_502:
	case SFID_X25_508:
                writeb (3, &data[0x01]);        /* T1 timer */
                writeb (10, &data[0x03]);       /* N2 */
                writeb (7, &data[0x06]);        /* HDLC window size */
                writeb (1, &data[0x0B]);        /* DTE */
                writeb (2, &data[0x0C]);        /* X.25 packet window size */
                writew (128, &data[0x0D]);	/* default X.25 data size */
                writew (128, &data[0x0F]);	/* maximum X.25 data size */
		break;
	}
	return 0;
}

/*============================================================================
 * Prepare configuration byte identifying adapter type and CPU clock rate.
 */
static unsigned char make_config_byte (sdlahw_t* hw)
{
	unsigned char byte = 0;

	switch (hw->pclk) {
		case 5000:  byte = 0x01; break;
		case 7200:  byte = 0x02; break;
		case 8000:  byte = 0x03; break;
		case 10000: byte = 0x04; break;
		case 16000: byte = 0x05; break;
	}

	switch (hw->type) {
		case SDLA_S502E: byte |= 0x80; break;
		case SDLA_S503:  byte |= 0x40; break;
	}
	return byte;
}

/*============================================================================
 * Start adapter's CPU.
 * o calculate a pointer to adapter's cold boot entry point
 * o position DPM window
 * o place boot instruction (jp addr) at cold boot entry point
 * o start CPU
 */
static int sdla_start (sdlahw_t* hw, unsigned addr)
{
	unsigned port = hw->port;
	unsigned char *bootp;
	int err, tmp, i;

	if (!port && (hw->type != SDLA_S514)) return -EFAULT;

 	switch (hw->type) {
	case SDLA_S502A:
		bootp = hw->dpmbase;
		bootp += 0x66;
		break;

	case SDLA_S502E:
	case SDLA_S503:
	case SDLA_S507:
	case SDLA_S508:
	case SDLA_S514:
		bootp = hw->dpmbase;
		break;

	default:
		return -EINVAL;
	}

	err = sdla_mapmem(hw, 0);
	if (err) return err;

      	writeb (0xC3, bootp);   /* Z80: 'jp' opcode */
	bootp ++;
	writew (addr, bootp);

	switch (hw->type) {
	case SDLA_S502A:
		_OUTB(port, 0x10);		/* issue NMI to CPU */
		hw->regs[0] = 0x10;
		break;

	case SDLA_S502E:
		_OUTB(port + 3, 0x01);		/* start CPU */
		hw->regs[3] = 0x01;
		for (i = 0; i < SDLA_IODELAY; ++i);
		if (_INB(port) & 0x01) {	/* verify */
			/*
			 * Enabling CPU changes functionality of the
			 * control register, so we have to reset its
			 * mirror.
			 */
			_OUTB(port, 0);		/* disable interrupts */
			hw->regs[0] = 0;
		}
		else return -EIO;
		break;

	case SDLA_S503:
		tmp = hw->regs[0] | 0x09;	/* set bits 0 and 3 */
		_OUTB(port, tmp);
		hw->regs[0] = tmp;		/* update mirror */
		for (i = 0; i < SDLA_IODELAY; ++i);
		if (!(_INB(port) & 0x01))	/* verify */
			return -EIO;
		break;

	case SDLA_S507:
		tmp = hw->regs[0] | 0x02;
		_OUTB(port, tmp);
		hw->regs[0] = tmp;		/* update mirror */
		for (i = 0; i < SDLA_IODELAY; ++i);
		if (!(_INB(port) & 0x04))	/* verify */
			return -EIO;
		break;

	case SDLA_S508:
		tmp = hw->regs[0] | 0x02;
		_OUTB(port, tmp);
		hw->regs[0] = tmp;	/* update mirror */
		for (i = 0; i < SDLA_IODELAY; ++i);
		if (!(_INB(port + 1) & 0x02))	/* verify */
			return -EIO;
		break;

	case SDLA_S514:
		writeb (S514_CPU_START, hw->vector);
		break;

	default:
		return -EINVAL;
	}
	return 0;
}

/*============================================================================
 * Initialize S502A adapter.
 */
static int init_s502a (sdlahw_t* hw)
{
	unsigned port = hw->port;
	int tmp, i;

	if (!detect_s502a(port))
		return -ENODEV;

	hw->regs[0] = 0x08;
	hw->regs[1] = 0xFF;

	/* Verify configuration options */
	i = get_option_index(s502a_dpmbase_options, virt_to_phys(hw->dpmbase));
	if (i == 0)
		return -EINVAL;

	tmp = s502a_hmcr[i - 1];
	switch (hw->dpmsize) {
	case 0x2000:
		tmp |= 0x01;
		break;

	case 0x10000L:
		break;

	default:
		return -EINVAL;
	}

	/* Setup dual-port memory window (this also enables memory access) */
	_OUTB(port + 1, tmp);
	hw->regs[1] = tmp;
	hw->regs[0] = 0x08;
	return 0;
}

/*============================================================================
 * Initialize S502E adapter.
 */
static int init_s502e (sdlahw_t* hw)
{
	unsigned port = hw->port;
	int tmp, i;

	if (!detect_s502e(port))
		return -ENODEV;

	/* Verify configuration options */
	i = get_option_index(s508_dpmbase_options, virt_to_phys(hw->dpmbase));
	if (i == 0)
		return -EINVAL;

	tmp = s502e_hmcr[i - 1];
	switch (hw->dpmsize) {
	case 0x2000:
		tmp |= 0x01;
		break;

	case 0x10000L:
		break;

	default:
		return -EINVAL;
	}

	/* Setup dual-port memory window */
	_OUTB(port + 1, tmp);
	hw->regs[1] = tmp;

	/* Enable memory access */
	_OUTB(port, 0x02);
	hw->regs[0] = 0x02;
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	return (_INB(port) & 0x02) ? 0 : -EIO;
}

/*============================================================================
 * Initialize S503 adapter.
 * ---------------------------------------------------------------------------
 */
static int init_s503 (sdlahw_t* hw)
{
	unsigned port = hw->port;
	int tmp, i;

	if (!detect_s503(port))
		return -ENODEV;

	/* Verify configuration options */
	i = get_option_index(s508_dpmbase_options, virt_to_phys(hw->dpmbase));
	if (i == 0)
		return -EINVAL;

	tmp = s502e_hmcr[i - 1];
	switch (hw->dpmsize) {
	case 0x2000:
		tmp |= 0x01;
		break;

	case 0x10000L:
		break;

	default:
		return -EINVAL;
	}

	/* Setup dual-port memory window */
	_OUTB(port + 1, tmp);
	hw->regs[1] = tmp;

	/* Enable memory access */
	_OUTB(port, 0x02);
	hw->regs[0] = 0x02;	/* update mirror */
	return 0;
}

/*============================================================================
 * Initialize S507 adapter.
 */
static int init_s507 (sdlahw_t* hw)
{
	unsigned port = hw->port;
	int tmp, i;

	if (!detect_s507(port))
		return -ENODEV;

	/* Verify configuration options */
	i = get_option_index(s507_dpmbase_options, virt_to_phys(hw->dpmbase));
	if (i == 0)
		return -EINVAL;

	tmp = s507_hmcr[i - 1];
	switch (hw->dpmsize) {
	case 0x2000:
		tmp |= 0x01;
		break;

	case 0x10000L:
		break;

	default:
		return -EINVAL;
	}

	/* Enable adapter's logic */
	_OUTB(port, 0x01);
	hw->regs[0] = 0x01;
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	if (!(_INB(port) & 0x20))
		return -EIO;

	/* Setup dual-port memory window */
	_OUTB(port + 1, tmp);
	hw->regs[1] = tmp;

	/* Enable memory access */
	tmp = hw->regs[0] | 0x04;
	if (hw->irq) {
		i = get_option_index(s508_irq_options, hw->irq);
		if (i) tmp |= s507_irqmask[i - 1];
	}
	_OUTB(port, tmp);
	hw->regs[0] = tmp;		/* update mirror */
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	return (_INB(port) & 0x08) ? 0 : -EIO;
}

/*============================================================================
 * Initialize S508 adapter.
 */
static int init_s508 (sdlahw_t* hw)
{
	unsigned port = hw->port;
	int tmp, i;

	if (!detect_s508(port))
		return -ENODEV;

	/* Verify configuration options */
	i = get_option_index(s508_dpmbase_options, virt_to_phys(hw->dpmbase));
	if (i == 0)
		return -EINVAL;

	/* Setup memory configuration */
	tmp = s508_hmcr[i - 1];
	_OUTB(port + 1, tmp);
	hw->regs[1] = tmp;

	/* Enable memory access */
	_OUTB(port, 0x04);
	hw->regs[0] = 0x04;		/* update mirror */
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	return (_INB(port + 1) & 0x04) ? 0 : -EIO;
}

/*============================================================================
 * Detect S502A adapter.
 *	Following tests are used to detect S502A adapter:
 *	1. All registers other than status (BASE) should read 0xFF
 *	2. After writing 00001000b to control register, status register should
 *	   read 01000000b.
 *	3. After writing 0 to control register, status register should still
 *	   read  01000000b.
 *	4. After writing 00000100b to control register, status register should
 *	   read 01000100b.
 *	Return 1 if detected o.k. or 0 if failed.
 *	Note:	This test is destructive! Adapter will be left in shutdown
 *		state after the test.
 */
static int detect_s502a (int port)
{
	int i, j;

	if (!get_option_index(s502_port_options, port))
		return 0;
	
	for (j = 1; j < SDLA_MAXIORANGE; ++j) {
		if (_INB(port + j) != 0xFF)
			return 0;
		for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	}

	_OUTB(port, 0x08);			/* halt CPU */
	_OUTB(port, 0x08);
	_OUTB(port, 0x08);
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	if (_INB(port) != 0x40)
		return 0;
	_OUTB(port, 0x00);
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	if (_INB(port) != 0x40)
		return 0;
	_OUTB(port, 0x04);
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	if (_INB(port) != 0x44)
		return 0;

	/* Reset adapter */
	_OUTB(port, 0x08);
	_OUTB(port, 0x08);
	_OUTB(port, 0x08);
	_OUTB(port + 1, 0xFF);
	return 1;
}

/*============================================================================
 * Detect S502E adapter.
 *	Following tests are used to verify adapter presence:
 *	1. All registers other than status (BASE) should read 0xFF.
 *	2. After writing 0 to CPU control register (BASE+3), status register
 *	   (BASE) should read 11111000b.
 *	3. After writing 00000100b to port BASE (set bit 2), status register
 *	   (BASE) should read 11111100b.
 *	Return 1 if detected o.k. or 0 if failed.
 *	Note:	This test is destructive! Adapter will be left in shutdown
 *		state after the test.
 */
static int detect_s502e (int port)
{
	int i, j;

	if (!get_option_index(s502_port_options, port))
		return 0;
	for (j = 1; j < SDLA_MAXIORANGE; ++j) {
		if (_INB(port + j) != 0xFF)
			return 0;
		for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	}

	_OUTB(port + 3, 0);			/* CPU control reg. */
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	if (_INB(port) != 0xF8)			/* read status */
		return 0;
	_OUTB(port, 0x04);			/* set bit 2 */
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	if (_INB(port) != 0xFC)			/* verify */
		return 0;

	/* Reset adapter */
	_OUTB(port, 0);
	return 1;
}

/*============================================================================
 * Detect s503 adapter.
 *	Following tests are used to verify adapter presence:
 *	1. All registers other than status (BASE) should read 0xFF.
 *	2. After writing 0 to control register (BASE), status register (BASE)
 *	   should read 11110000b.
 *	3. After writing 00000100b (set bit 2) to control register (BASE),
 *	   status register should read 11110010b.
 *	Return 1 if detected o.k. or 0 if failed.
 *	Note:	This test is destructive! Adapter will be left in shutdown
 *		state after the test.
 */
static int detect_s503 (int port)
{
	int i, j;

	if (!get_option_index(s503_port_options, port))
		return 0;
	for (j = 1; j < SDLA_MAXIORANGE; ++j) {
		if (_INB(port + j) != 0xFF)
			return 0;
		for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	}

	_OUTB(port, 0);				/* reset control reg.*/
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	if (_INB(port) != 0xF0)			/* read status */
		return 0;
	_OUTB(port, 0x04);			/* set bit 2 */
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	if (_INB(port) != 0xF2)			/* verify */
		return 0;

	/* Reset adapter */
	_OUTB(port, 0);
	return 1;
}

/*============================================================================
 * Detect s507 adapter.
 *	Following tests are used to detect s507 adapter:
 *	1. All ports should read the same value.
 *	2. After writing 0x00 to control register, status register should read
 *	   ?011000?b.
 *	3. After writing 0x01 to control register, status register should read
 *	   ?011001?b.
 *	Return 1 if detected o.k. or 0 if failed.
 *	Note:	This test is destructive! Adapter will be left in shutdown
 *		state after the test.
 */
static int detect_s507 (int port)
{
	int tmp, i, j;

	if (!get_option_index(s508_port_options, port))
		return 0;
	tmp = _INB(port);
	for (j = 1; j < S507_IORANGE; ++j) {
		if (_INB(port + j) != tmp)
			return 0;
		for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	}

	_OUTB(port, 0x00);
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	if ((_INB(port) & 0x7E) != 0x30)
		return 0;
	_OUTB(port, 0x01);
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	if ((_INB(port) & 0x7E) != 0x32)
		return 0;

	/* Reset adapter */
	_OUTB(port, 0x00);
	return 1;
}

/*============================================================================
 * Detect s508 adapter.
 *	Following tests are used to detect s508 adapter:
 *	1. After writing 0x00 to control register, status register should read
 *	   ??000000b.
 *	2. After writing 0x10 to control register, status register should read
 *	   ??010000b
 *	Return 1 if detected o.k. or 0 if failed.
 *	Note:	This test is destructive! Adapter will be left in shutdown
 *		state after the test.
 */
static int detect_s508 (int port)
{
	int i;

	if (!get_option_index(s508_port_options, port))
		return 0;
	_OUTB(port, 0x00);
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	if ((_INB(port + 1) & 0x3F) != 0x00)
		return 0;
	_OUTB(port, 0x10);
	for (i = 0; i < SDLA_IODELAY; ++i);	/* delay */
	if ((_INB(port + 1) & 0x3F) != 0x10)
		return 0;

	/* Reset adapter */
	_OUTB(port, 0x00);
	return 1;
}

/*============================================================================
 * Detect s514 PCI adapter.
 *      Return 1 if detected o.k. or 0 if failed.
 *      Note:   This test is destructive! Adapter will be left in shutdown
 *              state after the test.
 */
static int detect_s514 (sdlahw_t* hw)
{
	unsigned char CPU_no, slot_no, auto_slot_cfg;
	int number_S514_cards = 0;
	u32 S514_mem_base_addr = 0;
	u32 ut_u32;
	struct pci_dev *pci_dev;


#ifndef CONFIG_PCI
        printk(KERN_INFO "%s: Linux not compiled for PCI usage!\n", modname);
        return 0;
#endif

	/*
	The 'setup()' procedure in 'sdlamain.c' passes the CPU number and the
	slot number defined in 'router.conf' via the 'port' definition.
	*/
	CPU_no = hw->S514_cpu_no[0];
	slot_no = hw->S514_slot_no;
	auto_slot_cfg = hw->auto_pci_cfg;

	if (auto_slot_cfg){
		printk(KERN_INFO "%s: srch... S514 card, CPU %c, Slot=Auto\n",
		modname, CPU_no);

	}else{
		printk(KERN_INFO "%s: srch... S514 card, CPU %c, Slot #%d\n",
		modname, CPU_no, slot_no);
	}
	
	/* check to see that CPU A or B has been selected in 'router.conf' */
	switch(CPU_no) {
		case S514_CPU_A:
		case S514_CPU_B:
			break;
	
		default:
			printk(KERN_INFO "%s: S514 CPU definition invalid.\n", 
				modname);
			printk(KERN_INFO "Must be 'A' or 'B'\n");
			return 0;
	}

	number_S514_cards = find_s514_adapter(hw, 0);
	if(!number_S514_cards)
		return 0;

	/* we are using a single S514 adapter with a slot of 0 so re-read the */	
	/* location of this adapter */
	if((number_S514_cards == 1) && auto_slot_cfg) {	
        	number_S514_cards = find_s514_adapter(hw, 1);
		if(!number_S514_cards) {
			printk(KERN_INFO "%s: Error finding PCI card\n",
				modname);
			return 0;
		}
	}

	pci_dev = hw->pci_dev;
	/* read the physical memory base address */
	S514_mem_base_addr = (CPU_no == S514_CPU_A) ? 
		(pci_dev->resource[1].start) :
		(pci_dev->resource[2].start);
	
	printk(KERN_INFO "%s: S514 PCI memory at 0x%X\n",
		modname, S514_mem_base_addr);
	if(!S514_mem_base_addr) {
		if(CPU_no == S514_CPU_B)
			printk(KERN_INFO "%s: CPU #B not present on the card\n", 				modname);
		else
			printk(KERN_INFO "%s: No PCI memory allocated to card\n",				modname);
		return 0;
	}

	/* enable the PCI memory */
	pci_read_config_dword(pci_dev, 
		(CPU_no == S514_CPU_A) ? PCI_MAP0_DWORD : PCI_MAP1_DWORD,
		&ut_u32);
	pci_write_config_dword(pci_dev,
		(CPU_no == S514_CPU_A) ? PCI_MAP0_DWORD : PCI_MAP1_DWORD,
		(ut_u32 | PCI_MEMORY_ENABLE));

	/* check the IRQ allocated and enable IRQ usage */
	if(!(hw->irq = pci_dev->irq)) {
		printk(KERN_INFO "%s: IRQ not allocated to S514 adapter\n",
			modname);
                return 0;
	}

	/* BUG FIX : Mar 6 2000
 	 * On a initial loading of the card, we must check
         * and clear PCI interrupt bits, due to a reset
         * problem on some other boards.  i.e. An interrupt
         * might be pending, even after system bootup, 
         * in which case, when starting wanrouter the machine
         * would crash. 
	 */
	if (init_pci_slot(hw))
		return 0;

        pci_read_config_dword(pci_dev, PCI_INT_CONFIG, &ut_u32);
        ut_u32 |= (CPU_no == S514_CPU_A) ?
                PCI_ENABLE_IRQ_CPU_A : PCI_ENABLE_IRQ_CPU_B;
        pci_write_config_dword(pci_dev, PCI_INT_CONFIG, ut_u32);

	printk(KERN_INFO "%s: IRQ %d allocated to the S514 card\n",
		modname, hw->irq);

	/* map the physical PCI memory to virtual memory */
	(void *)hw->dpmbase = ioremap((unsigned long)S514_mem_base_addr,
		(unsigned long)MAX_SIZEOF_S514_MEMORY);
    	/* map the physical control register memory to virtual memory */
	hw->vector = (unsigned long)ioremap(
		(unsigned long)(S514_mem_base_addr + S514_CTRL_REG_BYTE),
		(unsigned long)16);
     
        if(!hw->dpmbase || !hw->vector) {
		printk(KERN_INFO "%s: PCI virtual memory allocation failed\n",
			modname);
                return 0;
	}

	/* halt the adapter */
	writeb (S514_CPU_HALT, hw->vector);	

	return 1;
}

/*============================================================================
 * Find the S514 PCI adapter in the PCI bus.
 *      Return the number of S514 adapters found (0 if no adapter found).
 */
static int find_s514_adapter(sdlahw_t* hw, char find_first_S514_card)
{
        unsigned char slot_no;
        int number_S514_cards = 0;
	char S514_found_in_slot = 0;
        u16 PCI_subsys_vendor;

        struct pci_dev *pci_dev = NULL;
 
       slot_no = hw->S514_slot_no;
  
	while ((pci_dev = pci_find_device(V3_VENDOR_ID, V3_DEVICE_ID, pci_dev))
        	!= NULL) {
                
		pci_read_config_word(pci_dev, PCI_SUBSYS_VENDOR_WORD,
                        &PCI_subsys_vendor);
                
		if(PCI_subsys_vendor != SANGOMA_SUBSYS_VENDOR)
                	continue;
        	
		hw->pci_dev = pci_dev;
		
		if(find_first_S514_card)
			return(1);
		
                number_S514_cards ++;
                
		printk(KERN_INFO
			"%s: S514 card found, slot #%d (devfn 0x%X)\n",
                        modname, ((pci_dev->devfn >> 3) & PCI_DEV_SLOT_MASK),
			pci_dev->devfn);
		
		if (hw->auto_pci_cfg){
			hw->S514_slot_no = ((pci_dev->devfn >> 3) & PCI_DEV_SLOT_MASK);
			slot_no = hw->S514_slot_no;
			
		}else if (((pci_dev->devfn >> 3) & PCI_DEV_SLOT_MASK) == slot_no){
                        S514_found_in_slot = 1;
                        break;
                }
        }

	/* if no S514 adapter has been found, then exit */
        if (!number_S514_cards) {
                printk(KERN_INFO "%s: Error, no S514 adapters found\n", modname);
                return 0;
        }
        /* if more than one S514 card has been found, then the user must have */        /* defined a slot number so that the correct adapter is used */
        else if ((number_S514_cards > 1) && hw->auto_pci_cfg) {
                printk(KERN_INFO "%s: Error, PCI Slot autodetect Failed! \n"
				 "%s:        More than one S514 adapter found.\n"
				 "%s:        Disable the Autodetect feature and supply\n"
				 "%s:        the PCISLOT numbers for each card.\n",
                        modname,modname,modname,modname);
                return 0;
        }
        /* if the user has specified a slot number and the S514 adapter has */
        /* not been found in that slot, then exit */
        else if (!hw->auto_pci_cfg && !S514_found_in_slot) {
                printk(KERN_INFO
			"%s: Error, S514 card not found in specified slot #%d\n",
                        modname, slot_no);
                return 0;
        }

	return (number_S514_cards);
}



/******* Miscellaneous ******************************************************/

/*============================================================================
 * Calibrate SDLA memory access delay.
 * Count number of idle loops made within 1 second and then calculate the
 * number of loops that should be made to achive desired delay.
 */
static int calibrate_delay (int mks)
{
	unsigned int delay;
	unsigned long stop;

	for (delay = 0, stop = SYSTEM_TICK + HZ; SYSTEM_TICK < stop; ++delay);
	return (delay/(1000000L/mks) + 1);
}

/*============================================================================
 * Get option's index into the options list.
 *	Return option's index (1 .. N) or zero if option is invalid.
 */
static int get_option_index (unsigned* optlist, unsigned optval)
{
	int i;

	for (i = 1; i <= optlist[0]; ++i)
		if ( optlist[i] == optval)
			return i;
	return 0;
}

/*============================================================================
 * Check memory region to see if it's available. 
 * Return:	0	ok.
 */
static unsigned check_memregion (void* ptr, unsigned len)
{
	volatile unsigned char* p = ptr;

        for (; len && (readb (p) == 0xFF); --len, ++p) {
                writeb (0, p);          /* attempt to write 0 */
                if (readb(p) != 0xFF) { /* still has to read 0xFF */
                        writeb (0xFF, p);/* restore original value */
                        break;          /* not good */
                }
        }

	return len;
}

/*============================================================================
 * Test memory region.
 * Return:	size of the region that passed the test.
 * Note:	Region size must be multiple of 2 !
 */
static unsigned test_memregion (void* ptr, unsigned len)
{
	volatile unsigned short* w_ptr;
	unsigned len_w = len >> 1;	/* region len in words */
	unsigned i;

        for (i = 0, w_ptr = ptr; i < len_w; ++i, ++w_ptr)
                writew (0xAA55, w_ptr);
        
	for (i = 0, w_ptr = ptr; i < len_w; ++i, ++w_ptr)
                if (readw (w_ptr) != 0xAA55) {
                        len_w = i;
                        break;
                }

        for (i = 0, w_ptr = ptr; i < len_w; ++i, ++w_ptr)
                writew (0x55AA, w_ptr);
        
        for (i = 0, w_ptr = ptr; i < len_w; ++i, ++w_ptr)
                if (readw(w_ptr) != 0x55AA) {
                        len_w = i;
                        break;
                }
        
        for (i = 0, w_ptr = ptr; i < len_w; ++i, ++w_ptr)
		writew (0, w_ptr);

        return len_w << 1;
}

/*============================================================================
 * Calculate 16-bit CRC using CCITT polynomial.
 */
static unsigned short checksum (unsigned char* buf, unsigned len)
{
	unsigned short crc = 0;
	unsigned mask, flag;

	for (; len; --len, ++buf) {
		for (mask = 0x80; mask; mask >>= 1) {
			flag = (crc & 0x8000);
			crc <<= 1;
			crc |= ((*buf & mask) ? 1 : 0);
			if (flag) crc ^= 0x1021;
		}
	}
	return crc;
}

static int init_pci_slot(sdlahw_t *hw)
{

	u32 int_status;
	int volatile found=0;
	int i=0;

	/* Check if this is a very first load for a specific
         * pci card. If it is, clear the interrput bits, and
         * set the flag indicating that this card was initialized.
	 */
	
	for (i=0; (i<MAX_S514_CARDS) && !found; i++){
		if (pci_slot_ar[i] == hw->S514_slot_no){
			found=1;
			break;
		}
		if (pci_slot_ar[i] == 0xFF){
			break;
		}
	}

	if (!found){
		read_S514_int_stat(hw,&int_status);
		S514_intack(hw,int_status);
		if (i == MAX_S514_CARDS){
			printk(KERN_INFO "%s: Critical Error !!!\n",modname);
			printk(KERN_INFO 
				"%s: Number of Sangoma PCI cards exceeded maximum limit.\n",
					modname);
			printk(KERN_INFO "Please contact Sangoma Technologies\n");
			return 1;
		}
		pci_slot_ar[i] = hw->S514_slot_no;
	}
	return 0;
}

static int pci_probe(sdlahw_t *hw)
{

        unsigned char slot_no;
        int number_S514_cards = 0;
        u16 PCI_subsys_vendor;
	u16 PCI_card_type;

        struct pci_dev *pci_dev = NULL;
	struct pci_bus *bus = NULL;
 
       slot_no = 0;
  
	while ((pci_dev = pci_find_device(V3_VENDOR_ID, V3_DEVICE_ID, pci_dev))
        	!= NULL) {
		
                pci_read_config_word(pci_dev, PCI_SUBSYS_VENDOR_WORD,
                        &PCI_subsys_vendor);
		
                if(PCI_subsys_vendor != SANGOMA_SUBSYS_VENDOR)
                	continue;

		pci_read_config_word(pci_dev, PCI_CARD_TYPE,
                        &PCI_card_type);
	
		bus = pci_dev->bus;
		
		/* A dual cpu card can support up to 4 physical connections,
		 * where a single cpu card can support up to 2 physical
		 * connections.  The FT1 card can only support a single 
		 * connection, however we cannot distinguish between a Single
		 * CPU card and an FT1 card. */
		if (PCI_card_type == S514_DUAL_CPU){
                	number_S514_cards += 4;
			 printk(KERN_INFO
				"wanpipe: S514-PCI card found, cpu(s) 2, bus #%d, slot #%d, irq #%d\n",
                        	bus->number,((pci_dev->devfn >> 3) & PCI_DEV_SLOT_MASK),
				pci_dev->irq);
		}else{
			number_S514_cards += 2;
			printk(KERN_INFO
				"wanpipe: S514-PCI card found, cpu(s) 1, bus #%d, slot #%d, irq #%d\n",
                        	bus->number,((pci_dev->devfn >> 3) & PCI_DEV_SLOT_MASK),
				pci_dev->irq);
		}
        }

	return number_S514_cards;

}



EXPORT_SYMBOL(wanpipe_hw_probe);

unsigned wanpipe_hw_probe(void)
{
	sdlahw_t hw;
	unsigned* opt = s508_port_options; 
	unsigned cardno=0;
	int i;
	
	memset(&hw, 0, sizeof(hw));
	
	for (i = 1; i <= opt[0]; i++) {
		if (detect_s508(opt[i])){
			/* S508 card can support up to two physical links */
			cardno+=2;
			printk(KERN_INFO "wanpipe: S508-ISA card found, port 0x%x\n",opt[i]);
		}
	}

      #ifdef CONFIG_PCI
	hw.S514_slot_no = 0;
	cardno += pci_probe(&hw);
      #else
	printk(KERN_INFO "wanpipe: Warning, Kernel not compiled for PCI support!\n");
	printk(KERN_INFO "wanpipe: PCI Hardware Probe Failed!\n");
      #endif

	return cardno;
}

/****** End *****************************************************************/