aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/net/hp100.c
blob: 55c7ed60839184829a9882b9480bf3203aeada46 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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













                                                                             
                                                















































































                                                                              







                            
                              








































































































































































                                                                                         
                                                                     










































































































































                                                                              
                   









































































































































                                                                                                          
                                                                         



















































































































































































































                                                                                                                                                                            


                                   
                 





                                                                                

                                                  
                   































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































                                                                                                                                            
                                                          













                                                                           
                                                          



































                                                                                              
                                                                  








                                                                             
                                                          









                                                                            
                                                          















































                                                                                         
                                                                  
































                                                                                           
                                                                  




















                                                                                                      
                                                                          

























































































































































                                                                                                                                                          




                                                                     






























































                                                                                              




                                                                            




































































                                                                                              

                                                     






































































                                                                                                                
/*
** hp100.c 
** HP CASCADE Architecture Driver for 100VG-AnyLan Network Adapters
**
** $Id: hp100.c,v 1.58 2001/09/24 18:03:01 perex Exp perex $
**
** Based on the HP100 driver written by Jaroslav Kysela <perex@jcu.cz>
** Extended for new busmaster capable chipsets by 
** Siegfried "Frieder" Loeffler (dg1sek) <floeff@mathematik.uni-stuttgart.de>
**
** Maintained by: Jaroslav Kysela <perex@suse.cz>
** 
** This driver has only been tested with
** -- HP J2585B 10/100 Mbit/s PCI Busmaster
** -- HP J2585A 10/100 Mbit/s PCI 
** -- HP J2970A 10 Mbit/s PCI Combo 10base-T/BNC
** -- HP J2973A 10 Mbit/s PCI 10base-T
** -- HP J2573  10/100 ISA
** -- Compex ReadyLink ENET100-VG4  10/100 Mbit/s PCI / EISA
** -- Compex FreedomLine 100/VG  10/100 Mbit/s ISA / EISA / PCI
** 
** but it should also work with the other CASCADE based adapters.
**
** TODO:
**       -  J2573 seems to hang sometimes when in shared memory mode.
**       -  Mode for Priority TX
**       -  Check PCI registers, performance might be improved?
**       -  To reduce interrupt load in busmaster, one could switch off
**          the interrupts that are used to refill the queues whenever the
**          queues are filled up to more than a certain threshold.
**       -  some updates for EISA version of card
**
**
**   This code 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.
**
**   This code is distributed in the hope that it will be useful,
**   but WITHOUT ANY WARRANTY; without even the implied warranty of
**   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
**   GNU General Public License for more details.
**
**   You should have received a copy of the GNU General Public License
**   along with this program; if not, write to the Free Software
**   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**
** 1.57c -> 1.58
**   - used indent to change coding-style
**   - added KTI DP-200 EISA ID
**   - ioremap is also used for low (<1MB) memory (multi-architecture support)
**
** 1.57b -> 1.57c - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
**   - release resources on failure in init_module
**
** 1.57 -> 1.57b - Jean II
**   - fix spinlocks, SMP is now working !
**
** 1.56 -> 1.57
**   - updates for new PCI interface for 2.1 kernels
**
** 1.55 -> 1.56
**   - removed printk in misc. interrupt and update statistics to allow
**     monitoring of card status
**   - timing changes in xmit routines, relogin to 100VG hub added when
**     driver does reset
**   - included fix for Compex FreedomLine PCI adapter
** 
** 1.54 -> 1.55
**   - fixed bad initialization in init_module
**   - added Compex FreedomLine adapter
**   - some fixes in card initialization
**
** 1.53 -> 1.54
**   - added hardware multicast filter support (doesn't work)
**   - little changes in hp100_sense_lan routine 
**     - added support for Coax and AUI (J2970)
**   - fix for multiple cards and hp100_mode parameter (insmod)
**   - fix for shared IRQ 
**
** 1.52 -> 1.53
**   - fixed bug in multicast support
**
*/

#define HP100_DEFAULT_PRIORITY_TX 0

#undef HP100_DEBUG
#undef HP100_DEBUG_B		/* Trace  */
#undef HP100_DEBUG_BM		/* Debug busmaster code (PDL stuff) */

#undef HP100_DEBUG_TRAINING	/* Debug login-to-hub procedure */
#undef HP100_DEBUG_TX
#undef HP100_DEBUG_IRQ
#undef HP100_DEBUG_RX

#undef HP100_MULTICAST_FILTER	/* Need to be debugged... */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/eisa.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/spinlock.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/types.h>
#include <linux/config.h>	/* for CONFIG_PCI */
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/bitops.h>

#include <asm/io.h>

#include "hp100.h"

/*
 *  defines
 */

#define HP100_BUS_ISA     0
#define HP100_BUS_EISA    1
#define HP100_BUS_PCI     2

#define HP100_REGION_SIZE	0x20	/* for ioports */
#define HP100_SIG_LEN		8	/* same as EISA_SIG_LEN */

#define HP100_MAX_PACKET_SIZE	(1536+4)
#define HP100_MIN_PACKET_SIZE	60

#ifndef HP100_DEFAULT_RX_RATIO
/* default - 75% onboard memory on the card are used for RX packets */
#define HP100_DEFAULT_RX_RATIO	75
#endif

#ifndef HP100_DEFAULT_PRIORITY_TX
/* default - don't enable transmit outgoing packets as priority */
#define HP100_DEFAULT_PRIORITY_TX 0
#endif

/*
 *  structures
 */

struct hp100_private {
	spinlock_t lock;
	char id[HP100_SIG_LEN];
	u_short chip;
	u_short soft_model;
	u_int memory_size;
	u_int virt_memory_size;
	u_short rx_ratio;	/* 1 - 99 */
	u_short priority_tx;	/* != 0 - priority tx */
	u_short mode;		/* PIO, Shared Mem or Busmaster */
	u_char bus;
	struct pci_dev *pci_dev;
	short mem_mapped;	/* memory mapped access */
	void __iomem *mem_ptr_virt;	/* virtual memory mapped area, maybe NULL */
	unsigned long mem_ptr_phys;	/* physical memory mapped area */
	short lan_type;		/* 10Mb/s, 100Mb/s or -1 (error) */
	int hub_status;		/* was login to hub successful? */
	u_char mac1_mode;
	u_char mac2_mode;
	u_char hash_bytes[8];
	struct net_device_stats stats;

	/* Rings for busmaster mode: */
	hp100_ring_t *rxrhead;	/* Head (oldest) index into rxring */
	hp100_ring_t *rxrtail;	/* Tail (newest) index into rxring */
	hp100_ring_t *txrhead;	/* Head (oldest) index into txring */
	hp100_ring_t *txrtail;	/* Tail (newest) index into txring */

	hp100_ring_t rxring[MAX_RX_PDL];
	hp100_ring_t txring[MAX_TX_PDL];

	u_int *page_vaddr_algn;	/* Aligned virtual address of allocated page */
	u_long whatever_offset;	/* Offset to bus/phys/dma address */
	int rxrcommit;		/* # Rx PDLs commited to adapter */
	int txrcommit;		/* # Tx PDLs commited to adapter */
};

/*
 *  variables
 */
static const char *hp100_isa_tbl[] = {
	"HWPF150", /* HP J2573 rev A */
	"HWP1950", /* HP J2573 */
};

#ifdef CONFIG_EISA
static struct eisa_device_id hp100_eisa_tbl[] = {
	{ "HWPF180" }, /* HP J2577 rev A */
	{ "HWP1920" }, /* HP 27248B */
	{ "HWP1940" }, /* HP J2577 */
	{ "HWP1990" }, /* HP J2577 */
	{ "CPX0301" }, /* ReadyLink ENET100-VG4 */
	{ "CPX0401" }, /* FreedomLine 100/VG */
	{ "" }	       /* Mandatory final entry ! */
};
MODULE_DEVICE_TABLE(eisa, hp100_eisa_tbl);
#endif

#ifdef CONFIG_PCI
static struct pci_device_id hp100_pci_tbl[] = {
	{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_J2585A, PCI_ANY_ID, PCI_ANY_ID,},
	{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_J2585B, PCI_ANY_ID, PCI_ANY_ID,},
	{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_J2970A, PCI_ANY_ID, PCI_ANY_ID,},
	{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_J2973A, PCI_ANY_ID, PCI_ANY_ID,},
	{PCI_VENDOR_ID_COMPEX, PCI_DEVICE_ID_COMPEX_ENET100VG4, PCI_ANY_ID, PCI_ANY_ID,},
	{PCI_VENDOR_ID_COMPEX2, PCI_DEVICE_ID_COMPEX2_100VG, PCI_ANY_ID, PCI_ANY_ID,},
/*	{PCI_VENDOR_ID_KTI, PCI_DEVICE_ID_KTI_DP200, PCI_ANY_ID, PCI_ANY_ID }, */
	{}			/* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, hp100_pci_tbl);
#endif

static int hp100_rx_ratio = HP100_DEFAULT_RX_RATIO;
static int hp100_priority_tx = HP100_DEFAULT_PRIORITY_TX;
static int hp100_mode = 1;

module_param(hp100_rx_ratio, int, 0);
module_param(hp100_priority_tx, int, 0);
module_param(hp100_mode, int, 0);

/*
 *  prototypes
 */

static int hp100_probe1(struct net_device *dev, int ioaddr, u_char bus,
			struct pci_dev *pci_dev);


static int hp100_open(struct net_device *dev);
static int hp100_close(struct net_device *dev);
static int hp100_start_xmit(struct sk_buff *skb, struct net_device *dev);
static int hp100_start_xmit_bm(struct sk_buff *skb,
			       struct net_device *dev);
static void hp100_rx(struct net_device *dev);
static struct net_device_stats *hp100_get_stats(struct net_device *dev);
static void hp100_misc_interrupt(struct net_device *dev);
static void hp100_update_stats(struct net_device *dev);
static void hp100_clear_stats(struct hp100_private *lp, int ioaddr);
static void hp100_set_multicast_list(struct net_device *dev);
static irqreturn_t hp100_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static void hp100_start_interface(struct net_device *dev);
static void hp100_stop_interface(struct net_device *dev);
static void hp100_load_eeprom(struct net_device *dev, u_short ioaddr);
static int hp100_sense_lan(struct net_device *dev);
static int hp100_login_to_vg_hub(struct net_device *dev,
				 u_short force_relogin);
static int hp100_down_vg_link(struct net_device *dev);
static void hp100_cascade_reset(struct net_device *dev, u_short enable);
static void hp100_BM_shutdown(struct net_device *dev);
static void hp100_mmuinit(struct net_device *dev);
static void hp100_init_pdls(struct net_device *dev);
static int hp100_init_rxpdl(struct net_device *dev,
			    register hp100_ring_t * ringptr,
			    register u_int * pdlptr);
static int hp100_init_txpdl(struct net_device *dev,
			    register hp100_ring_t * ringptr,
			    register u_int * pdlptr);
static void hp100_rxfill(struct net_device *dev);
static void hp100_hwinit(struct net_device *dev);
static void hp100_clean_txring(struct net_device *dev);
#ifdef HP100_DEBUG
static void hp100_RegisterDump(struct net_device *dev);
#endif

/* Conversion to new PCI API :
 * Convert an address in a kernel buffer to a bus/phys/dma address.
 * This work *only* for memory fragments part of lp->page_vaddr,
 * because it was properly DMA allocated via pci_alloc_consistent(),
 * so we just need to "retrieve" the original mapping to bus/phys/dma
 * address - Jean II */
static inline dma_addr_t virt_to_whatever(struct net_device *dev, u32 * ptr)
{
	struct hp100_private *lp = netdev_priv(dev);
	return ((u_long) ptr) + lp->whatever_offset;
}

static inline u_int pdl_map_data(struct hp100_private *lp, void *data)
{
	return pci_map_single(lp->pci_dev, data, 
			      MAX_ETHER_SIZE, PCI_DMA_FROMDEVICE);
}

/* TODO: This function should not really be needed in a good design... */
static void wait(void)
{
	mdelay(1);
}

/*
 *  probe functions
 *  These functions should - if possible - avoid doing write operations
 *  since this could cause problems when the card is not installed.
 */

/*
 * Read board id and convert to string.
 * Effectively same code as decode_eisa_sig
 */
static __devinit const char *hp100_read_id(int ioaddr)
{
	int i;
	static char str[HP100_SIG_LEN];
	unsigned char sig[4], sum;
        unsigned short rev;

	hp100_page(ID_MAC_ADDR);
	sum = 0;
	for (i = 0; i < 4; i++) {
		sig[i] = hp100_inb(BOARD_ID + i);
		sum += sig[i];
	}

	sum += hp100_inb(BOARD_ID + i);
	if (sum != 0xff)
		return NULL;	/* bad checksum */

        str[0] = ((sig[0] >> 2) & 0x1f) + ('A' - 1);
        str[1] = (((sig[0] & 3) << 3) | (sig[1] >> 5)) + ('A' - 1);
        str[2] = (sig[1] & 0x1f) + ('A' - 1);
        rev = (sig[2] << 8) | sig[3];
        sprintf(str + 3, "%04X", rev);

	return str;
}

static __init int hp100_isa_probe1(struct net_device *dev, int ioaddr)
{
	const char *sig;
	int i;

	if (!request_region(ioaddr, HP100_REGION_SIZE, "hp100"))
		goto err;

	if (hp100_inw(HW_ID) != HP100_HW_ID_CASCADE) {
		release_region(ioaddr, HP100_REGION_SIZE);
		goto err;
	}

	sig = hp100_read_id(ioaddr);
	release_region(ioaddr, HP100_REGION_SIZE);

	if (sig == NULL)
		goto err;

	for (i = 0; i < ARRAY_SIZE(hp100_isa_tbl); i++) {
		if (!strcmp(hp100_isa_tbl[i], sig)) 
			break;

	}

	if (i < ARRAY_SIZE(hp100_isa_tbl))
		return hp100_probe1(dev, ioaddr, HP100_BUS_ISA, NULL);
 err:
	return -ENODEV;

}
/*
 * Probe for ISA board.
 * EISA and PCI are handled by device infrastructure.
 */

static int  __init hp100_isa_probe(struct net_device *dev, int addr)
{
	int err = -ENODEV;

	/* Probe for a specific ISA address */		
	if (addr > 0xff && addr < 0x400)
		err = hp100_isa_probe1(dev, addr);

	else if (addr != 0) 
		err = -ENXIO;

	else {
		/* Probe all ISA possible port regions */
		for (addr = 0x100; addr < 0x400; addr += 0x20) {
			err = hp100_isa_probe1(dev, addr);
			if (!err)
				break;
		}
	}
	return err;
}


#ifndef MODULE
struct net_device * __init hp100_probe(int unit)
{
	struct net_device *dev = alloc_etherdev(sizeof(struct hp100_private));
	int err;

	if (!dev)
		return ERR_PTR(-ENODEV);

	SET_MODULE_OWNER(dev);

#ifdef HP100_DEBUG_B
	hp100_outw(0x4200, TRACE);
	printk("hp100: %s: probe\n", dev->name);
#endif

	if (unit >= 0) {
		sprintf(dev->name, "eth%d", unit);
		netdev_boot_setup_check(dev);
	}

	err = hp100_isa_probe(dev, dev->base_addr);
	if (err)
		goto out;

	return dev;
 out:
	free_netdev(dev);
	return ERR_PTR(err);
}
#endif

static int __devinit hp100_probe1(struct net_device *dev, int ioaddr,
				  u_char bus, struct pci_dev *pci_dev)
{
	int i;
	int err = -ENODEV;
	const char *eid;
	u_int chip;
	u_char uc;
	u_int memory_size = 0, virt_memory_size = 0;
	u_short local_mode, lsw;
	short mem_mapped;
	unsigned long mem_ptr_phys;
	void __iomem *mem_ptr_virt;
	struct hp100_private *lp;

#ifdef HP100_DEBUG_B
	hp100_outw(0x4201, TRACE);
	printk("hp100: %s: probe1\n", dev->name);
#endif

	/* memory region for programmed i/o */
	if (!request_region(ioaddr, HP100_REGION_SIZE, "hp100"))
		goto out1;

	if (hp100_inw(HW_ID) != HP100_HW_ID_CASCADE) 
		goto out2;

	chip = hp100_inw(PAGING) & HP100_CHIPID_MASK;
#ifdef HP100_DEBUG
	if (chip == HP100_CHIPID_SHASTA)
		printk("hp100: %s: Shasta Chip detected. (This is a pre 802.12 chip)\n", dev->name);
	else if (chip == HP100_CHIPID_RAINIER)
		printk("hp100: %s: Rainier Chip detected. (This is a pre 802.12 chip)\n", dev->name);
	else if (chip == HP100_CHIPID_LASSEN)
		printk("hp100: %s: Lassen Chip detected.\n", dev->name);
	else
		printk("hp100: %s: Warning: Unknown CASCADE chip (id=0x%.4x).\n", dev->name, chip);
#endif

	dev->base_addr = ioaddr;

	eid = hp100_read_id(ioaddr);
	if (eid == NULL) {	/* bad checksum? */
		printk(KERN_WARNING "hp100_probe: bad ID checksum at base port 0x%x\n", ioaddr);
		goto out2;
	}

	hp100_page(ID_MAC_ADDR);
	for (i = uc = 0; i < 7; i++)
		uc += hp100_inb(LAN_ADDR + i);
	if (uc != 0xff) {
		printk(KERN_WARNING "hp100_probe: bad lan address checksum at port 0x%x)\n", ioaddr);
		err = -EIO;
		goto out2;
	}

	/* Make sure, that all registers are correctly updated... */

	hp100_load_eeprom(dev, ioaddr);
	wait();

	/*
	 * Determine driver operation mode
	 *
	 * Use the variable "hp100_mode" upon insmod or as kernel parameter to
	 * force driver modes:
	 * hp100_mode=1 -> default, use busmaster mode if configured.
	 * hp100_mode=2 -> enable shared memory mode 
	 * hp100_mode=3 -> force use of i/o mapped mode.
	 * hp100_mode=4 -> same as 1, but re-set the enable bit on the card.
	 */

	/*
	 * LSW values:
	 *   0x2278 -> J2585B, PnP shared memory mode
	 *   0x2270 -> J2585B, shared memory mode, 0xdc000
	 *   0xa23c -> J2585B, I/O mapped mode
	 *   0x2240 -> EISA COMPEX, BusMaster (Shasta Chip)
	 *   0x2220 -> EISA HP, I/O (Shasta Chip)
	 *   0x2260 -> EISA HP, BusMaster (Shasta Chip)
	 */

#if 0
	local_mode = 0x2270;
	hp100_outw(0xfefe, OPTION_LSW);
	hp100_outw(local_mode | HP100_SET_LB | HP100_SET_HB, OPTION_LSW);
#endif

	/* hp100_mode value maybe used in future by another card */
	local_mode = hp100_mode;
	if (local_mode < 1 || local_mode > 4)
		local_mode = 1;	/* default */
#ifdef HP100_DEBUG
	printk("hp100: %s: original LSW = 0x%x\n", dev->name,
	       hp100_inw(OPTION_LSW));
#endif

	if (local_mode == 3) {
		hp100_outw(HP100_MEM_EN | HP100_RESET_LB, OPTION_LSW);
		hp100_outw(HP100_IO_EN | HP100_SET_LB, OPTION_LSW);
		hp100_outw(HP100_BM_WRITE | HP100_BM_READ | HP100_RESET_HB, OPTION_LSW);
		printk("hp100: IO mapped mode forced.\n");
	} else if (local_mode == 2) {
		hp100_outw(HP100_MEM_EN | HP100_SET_LB, OPTION_LSW);
		hp100_outw(HP100_IO_EN | HP100_SET_LB, OPTION_LSW);
		hp100_outw(HP100_BM_WRITE | HP100_BM_READ | HP100_RESET_HB, OPTION_LSW);
		printk("hp100: Shared memory mode requested.\n");
	} else if (local_mode == 4) {
		if (chip == HP100_CHIPID_LASSEN) {
			hp100_outw(HP100_BM_WRITE | HP100_BM_READ | HP100_SET_HB, OPTION_LSW);
			hp100_outw(HP100_IO_EN | HP100_MEM_EN | HP100_RESET_LB, OPTION_LSW);
			printk("hp100: Busmaster mode requested.\n");
		}
		local_mode = 1;
	}

	if (local_mode == 1) {	/* default behaviour */
		lsw = hp100_inw(OPTION_LSW);

		if ((lsw & HP100_IO_EN) && (~lsw & HP100_MEM_EN) &&
		    (~lsw & (HP100_BM_WRITE | HP100_BM_READ))) {
#ifdef HP100_DEBUG
			printk("hp100: %s: IO_EN bit is set on card.\n", dev->name);
#endif
			local_mode = 3;
		} else if (chip == HP100_CHIPID_LASSEN &&
			   (lsw & (HP100_BM_WRITE | HP100_BM_READ)) == (HP100_BM_WRITE | HP100_BM_READ)) {
			/* Conversion to new PCI API :
			 * I don't have the doc, but I assume that the card
			 * can map the full 32bit address space.
			 * Also, we can have EISA Busmaster cards (not tested),
			 * so beware !!! - Jean II */
			if((bus == HP100_BUS_PCI) &&
			   (pci_set_dma_mask(pci_dev, DMA_32BIT_MASK))) {
				/* Gracefully fallback to shared memory */
				goto busmasterfail;
			}
			printk("hp100: Busmaster mode enabled.\n");
			hp100_outw(HP100_MEM_EN | HP100_IO_EN | HP100_RESET_LB, OPTION_LSW);
		} else {
		busmasterfail:
#ifdef HP100_DEBUG
			printk("hp100: %s: Card not configured for BM or BM not supported with this card.\n", dev->name);
			printk("hp100: %s: Trying shared memory mode.\n", dev->name);
#endif
			/* In this case, try shared memory mode */
			local_mode = 2;
			hp100_outw(HP100_MEM_EN | HP100_SET_LB, OPTION_LSW);
			/* hp100_outw(HP100_IO_EN|HP100_RESET_LB, OPTION_LSW); */
		}
	}
#ifdef HP100_DEBUG
	printk("hp100: %s: new LSW = 0x%x\n", dev->name, hp100_inw(OPTION_LSW));
#endif

	/* Check for shared memory on the card, eventually remap it */
	hp100_page(HW_MAP);
	mem_mapped = ((hp100_inw(OPTION_LSW) & (HP100_MEM_EN)) != 0);
	mem_ptr_phys = 0UL;
	mem_ptr_virt = NULL;
	memory_size = (8192 << ((hp100_inb(SRAM) >> 5) & 0x07));
	virt_memory_size = 0;

	/* For memory mapped or busmaster mode, we want the memory address */
	if (mem_mapped || (local_mode == 1)) {
		mem_ptr_phys = (hp100_inw(MEM_MAP_LSW) | (hp100_inw(MEM_MAP_MSW) << 16));
		mem_ptr_phys &= ~0x1fff;	/* 8k alignment */

		if (bus == HP100_BUS_ISA && (mem_ptr_phys & ~0xfffff) != 0) {
			printk("hp100: Can only use programmed i/o mode.\n");
			mem_ptr_phys = 0;
			mem_mapped = 0;
			local_mode = 3;	/* Use programmed i/o */
		}

		/* We do not need access to shared memory in busmaster mode */
		/* However in slave mode we need to remap high (>1GB) card memory  */
		if (local_mode != 1) {	/* = not busmaster */
			/* We try with smaller memory sizes, if ioremap fails */
			for (virt_memory_size = memory_size; virt_memory_size > 16383; virt_memory_size >>= 1) {
				if ((mem_ptr_virt = ioremap((u_long) mem_ptr_phys, virt_memory_size)) == NULL) {
#ifdef HP100_DEBUG
					printk("hp100: %s: ioremap for 0x%x bytes high PCI memory at 0x%lx failed\n", dev->name, virt_memory_size, mem_ptr_phys);
#endif
				} else {
#ifdef HP100_DEBUG
					printk("hp100: %s: remapped 0x%x bytes high PCI memory at 0x%lx to %p.\n", dev->name, virt_memory_size, mem_ptr_phys, mem_ptr_virt);
#endif
					break;
				}
			}

			if (mem_ptr_virt == NULL) {	/* all ioremap tries failed */
				printk("hp100: Failed to ioremap the PCI card memory. Will have to use i/o mapped mode.\n");
				local_mode = 3;
				virt_memory_size = 0;
			}
		}
	}

	if (local_mode == 3) {	/* io mapped forced */
		mem_mapped = 0;
		mem_ptr_phys = 0;
		mem_ptr_virt = NULL;
		printk("hp100: Using (slow) programmed i/o mode.\n");
	}

	/* Initialise the "private" data structure for this card. */
	lp = netdev_priv(dev);

	spin_lock_init(&lp->lock);
	strlcpy(lp->id, eid, HP100_SIG_LEN);
	lp->chip = chip;
	lp->mode = local_mode;
	lp->bus = bus;
	lp->pci_dev = pci_dev;
	lp->priority_tx = hp100_priority_tx;
	lp->rx_ratio = hp100_rx_ratio;
	lp->mem_ptr_phys = mem_ptr_phys;
	lp->mem_ptr_virt = mem_ptr_virt;
	hp100_page(ID_MAC_ADDR);
	lp->soft_model = hp100_inb(SOFT_MODEL);
	lp->mac1_mode = HP100_MAC1MODE3;
	lp->mac2_mode = HP100_MAC2MODE3;
	memset(&lp->hash_bytes, 0x00, 8);

	dev->base_addr = ioaddr;

	lp->memory_size = memory_size;
	lp->virt_memory_size = virt_memory_size;
	lp->rx_ratio = hp100_rx_ratio;	/* can be conf'd with insmod */

	dev->open = hp100_open;
	dev->stop = hp100_close;

	if (lp->mode == 1)	/* busmaster */
		dev->hard_start_xmit = hp100_start_xmit_bm;
	else
		dev->hard_start_xmit = hp100_start_xmit;

	dev->get_stats = hp100_get_stats;
	dev->set_multicast_list = &hp100_set_multicast_list;

	/* Ask the card for which IRQ line it is configured */
	if (bus == HP100_BUS_PCI) {
		dev->irq = pci_dev->irq;
	} else {
		hp100_page(HW_MAP);
		dev->irq = hp100_inb(IRQ_CHANNEL) & HP100_IRQMASK;
		if (dev->irq == 2)
			dev->irq = 9;
	}

	if (lp->mode == 1)	/* busmaster */
		dev->dma = 4;

	/* Ask the card for its MAC address and store it for later use. */
	hp100_page(ID_MAC_ADDR);
	for (i = uc = 0; i < 6; i++)
		dev->dev_addr[i] = hp100_inb(LAN_ADDR + i);

	/* Reset statistics (counters) */
	hp100_clear_stats(lp, ioaddr);

	/* If busmaster mode is wanted, a dma-capable memory area is needed for
	 * the rx and tx PDLs 
	 * PCI cards can access the whole PC memory. Therefore GFP_DMA is not
	 * needed for the allocation of the memory area. 
	 */

	/* TODO: We do not need this with old cards, where PDLs are stored
	 * in the cards shared memory area. But currently, busmaster has been
	 * implemented/tested only with the lassen chip anyway... */
	if (lp->mode == 1) {	/* busmaster */
		dma_addr_t page_baddr;
		/* Get physically continous memory for TX & RX PDLs    */
		/* Conversion to new PCI API :
		 * Pages are always aligned and zeroed, no need to it ourself.
		 * Doc says should be OK for EISA bus as well - Jean II */
		if ((lp->page_vaddr_algn = pci_alloc_consistent(lp->pci_dev, MAX_RINGSIZE, &page_baddr)) == NULL) {
			err = -ENOMEM;
			goto out2;
		}
		lp->whatever_offset = ((u_long) page_baddr) - ((u_long) lp->page_vaddr_algn);

#ifdef HP100_DEBUG_BM
		printk("hp100: %s: Reserved DMA memory from 0x%x to 0x%x\n", dev->name, (u_int) lp->page_vaddr_algn, (u_int) lp->page_vaddr_algn + MAX_RINGSIZE);
#endif
		lp->rxrcommit = lp->txrcommit = 0;
		lp->rxrhead = lp->rxrtail = &(lp->rxring[0]);
		lp->txrhead = lp->txrtail = &(lp->txring[0]);
	}

	/* Initialise the card. */
	/* (I'm not really sure if it's a good idea to do this during probing, but 
	 * like this it's assured that the lan connection type can be sensed
	 * correctly)
	 */
	hp100_hwinit(dev);

	/* Try to find out which kind of LAN the card is connected to. */
	lp->lan_type = hp100_sense_lan(dev);

	/* Print out a message what about what we think we have probed. */
	printk("hp100: at 0x%x, IRQ %d, ", ioaddr, dev->irq);
	switch (bus) {
	case HP100_BUS_EISA:
		printk("EISA");
		break;
	case HP100_BUS_PCI:
		printk("PCI");
		break;
	default:
		printk("ISA");
		break;
	}
	printk(" bus, %dk SRAM (rx/tx %d%%).\n", lp->memory_size >> 10, lp->rx_ratio);

	if (lp->mode == 2) {	/* memory mapped */
		printk("hp100: Memory area at 0x%lx-0x%lx", mem_ptr_phys,
				(mem_ptr_phys + (mem_ptr_phys > 0x100000 ? (u_long) lp->memory_size : 16 * 1024)) - 1);
		if (mem_ptr_virt)
			printk(" (virtual base %p)", mem_ptr_virt);
		printk(".\n");

		/* Set for info when doing ifconfig */
		dev->mem_start = mem_ptr_phys;
		dev->mem_end = mem_ptr_phys + lp->memory_size;
	}

	printk("hp100: ");
	if (lp->lan_type != HP100_LAN_ERR)
		printk("Adapter is attached to ");
	switch (lp->lan_type) {
	case HP100_LAN_100:
		printk("100Mb/s Voice Grade AnyLAN network.\n");
		break;
	case HP100_LAN_10:
		printk("10Mb/s network (10baseT).\n");
		break;
	case HP100_LAN_COAX:
		printk("10Mb/s network (coax).\n");
		break;
	default:
		printk("Warning! Link down.\n");
	}

	err = register_netdev(dev);
	if (err)
		goto out3;

	return 0;
out3:
	if (local_mode == 1)
		pci_free_consistent(lp->pci_dev, MAX_RINGSIZE + 0x0f, 
				    lp->page_vaddr_algn, 
				    virt_to_whatever(dev, lp->page_vaddr_algn));
	if (mem_ptr_virt)
		iounmap(mem_ptr_virt);
out2:
	release_region(ioaddr, HP100_REGION_SIZE);
out1:
	return err;
}

/* This procedure puts the card into a stable init state */
static void hp100_hwinit(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	struct hp100_private *lp = netdev_priv(dev);

#ifdef HP100_DEBUG_B
	hp100_outw(0x4202, TRACE);
	printk("hp100: %s: hwinit\n", dev->name);
#endif

	/* Initialise the card. -------------------------------------------- */

	/* Clear all pending Ints and disable Ints */
	hp100_page(PERFORMANCE);
	hp100_outw(0xfefe, IRQ_MASK);	/* mask off all ints */
	hp100_outw(0xffff, IRQ_STATUS);	/* clear all pending ints */

	hp100_outw(HP100_INT_EN | HP100_RESET_LB, OPTION_LSW);
	hp100_outw(HP100_TRI_INT | HP100_SET_HB, OPTION_LSW);

	if (lp->mode == 1) {
		hp100_BM_shutdown(dev);	/* disables BM, puts cascade in reset */
		wait();
	} else {
		hp100_outw(HP100_INT_EN | HP100_RESET_LB, OPTION_LSW);
		hp100_cascade_reset(dev, 1);
		hp100_page(MAC_CTRL);
		hp100_andb(~(HP100_RX_EN | HP100_TX_EN), MAC_CFG_1);
	}

	/* Initiate EEPROM reload */
	hp100_load_eeprom(dev, 0);

	wait();

	/* Go into reset again. */
	hp100_cascade_reset(dev, 1);

	/* Set Option Registers to a safe state  */
	hp100_outw(HP100_DEBUG_EN |
		   HP100_RX_HDR |
		   HP100_EE_EN |
		   HP100_BM_WRITE |
		   HP100_BM_READ | HP100_RESET_HB |
		   HP100_FAKE_INT |
		   HP100_INT_EN |
		   HP100_MEM_EN |
		   HP100_IO_EN | HP100_RESET_LB, OPTION_LSW);

	hp100_outw(HP100_TRI_INT |
		   HP100_MMAP_DIS | HP100_SET_HB, OPTION_LSW);

	hp100_outb(HP100_PRIORITY_TX |
		   HP100_ADV_NXT_PKT |
		   HP100_TX_CMD | HP100_RESET_LB, OPTION_MSW);

	/* TODO: Configure MMU for Ram Test. */
	/* TODO: Ram Test. */

	/* Re-check if adapter is still at same i/o location      */
	/* (If the base i/o in eeprom has been changed but the    */
	/* registers had not been changed, a reload of the eeprom */
	/* would move the adapter to the address stored in eeprom */

	/* TODO: Code to implement. */

	/* Until here it was code from HWdiscover procedure. */
	/* Next comes code from mmuinit procedure of SCO BM driver which is
	 * called from HWconfigure in the SCO driver.  */

	/* Initialise MMU, eventually switch on Busmaster Mode, initialise 
	 * multicast filter...
	 */
	hp100_mmuinit(dev);

	/* We don't turn the interrupts on here - this is done by start_interface. */
	wait();			/* TODO: Do we really need this? */

	/* Enable Hardware (e.g. unreset) */
	hp100_cascade_reset(dev, 0);

	/* ------- initialisation complete ----------- */

	/* Finally try to log in the Hub if there may be a VG connection. */
	if ((lp->lan_type == HP100_LAN_100) || (lp->lan_type == HP100_LAN_ERR))
		hp100_login_to_vg_hub(dev, 0);	/* relogin */

}


/* 
 * mmuinit - Reinitialise Cascade MMU and MAC settings.
 * Note: Must already be in reset and leaves card in reset. 
 */
static void hp100_mmuinit(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	struct hp100_private *lp = netdev_priv(dev);
	int i;

#ifdef HP100_DEBUG_B
	hp100_outw(0x4203, TRACE);
	printk("hp100: %s: mmuinit\n", dev->name);
#endif

#ifdef HP100_DEBUG
	if (0 != (hp100_inw(OPTION_LSW) & HP100_HW_RST)) {
		printk("hp100: %s: Not in reset when entering mmuinit. Fix me.\n", dev->name);
		return;
	}
#endif

	/* Make sure IRQs are masked off and ack'ed. */
	hp100_page(PERFORMANCE);
	hp100_outw(0xfefe, IRQ_MASK);	/* mask off all ints */
	hp100_outw(0xffff, IRQ_STATUS);	/* ack IRQ */

	/*
	 * Enable Hardware 
	 * - Clear Debug En, Rx Hdr Pipe, EE En, I/O En, Fake Int and Intr En
	 * - Set Tri-State Int, Bus Master Rd/Wr, and Mem Map Disable
	 * - Clear Priority, Advance Pkt and Xmit Cmd
	 */

	hp100_outw(HP100_DEBUG_EN |
		   HP100_RX_HDR |
		   HP100_EE_EN | HP100_RESET_HB |
		   HP100_IO_EN |
		   HP100_FAKE_INT |
		   HP100_INT_EN | HP100_RESET_LB, OPTION_LSW);

	hp100_outw(HP100_TRI_INT | HP100_SET_HB, OPTION_LSW);

	if (lp->mode == 1) {	/* busmaster */
		hp100_outw(HP100_BM_WRITE |
			   HP100_BM_READ |
			   HP100_MMAP_DIS | HP100_SET_HB, OPTION_LSW);
	} else if (lp->mode == 2) {	/* memory mapped */
		hp100_outw(HP100_BM_WRITE |
			   HP100_BM_READ | HP100_RESET_HB, OPTION_LSW);
		hp100_outw(HP100_MMAP_DIS | HP100_RESET_HB, OPTION_LSW);
		hp100_outw(HP100_MEM_EN | HP100_SET_LB, OPTION_LSW);
		hp100_outw(HP100_IO_EN | HP100_SET_LB, OPTION_LSW);
	} else if (lp->mode == 3) {	/* i/o mapped mode */
		hp100_outw(HP100_MMAP_DIS | HP100_SET_HB |
			   HP100_IO_EN | HP100_SET_LB, OPTION_LSW);
	}

	hp100_page(HW_MAP);
	hp100_outb(0, EARLYRXCFG);
	hp100_outw(0, EARLYTXCFG);

	/*
	 * Enable Bus Master mode
	 */
	if (lp->mode == 1) {	/* busmaster */
		/* Experimental: Set some PCI configuration bits */
		hp100_page(HW_MAP);
		hp100_andb(~HP100_PDL_USE3, MODECTRL1);	/* BM engine read maximum */
		hp100_andb(~HP100_TX_DUALQ, MODECTRL1);	/* No Queue for Priority TX */

		/* PCI Bus failures should result in a Misc. Interrupt */
		hp100_orb(HP100_EN_BUS_FAIL, MODECTRL2);

		hp100_outw(HP100_BM_READ | HP100_BM_WRITE | HP100_SET_HB, OPTION_LSW);
		hp100_page(HW_MAP);
		/* Use Burst Mode and switch on PAGE_CK */
		hp100_orb(HP100_BM_BURST_RD | HP100_BM_BURST_WR, BM);
		if ((lp->chip == HP100_CHIPID_RAINIER) || (lp->chip == HP100_CHIPID_SHASTA))
			hp100_orb(HP100_BM_PAGE_CK, BM);
		hp100_orb(HP100_BM_MASTER, BM);
	} else {		/* not busmaster */

		hp100_page(HW_MAP);
		hp100_andb(~HP100_BM_MASTER, BM);
	}

	/*
	 * Divide card memory into regions for Rx, Tx and, if non-ETR chip, PDLs
	 */
	hp100_page(MMU_CFG);
	if (lp->mode == 1) {	/* only needed for Busmaster */
		int xmit_stop, recv_stop;

		if ((lp->chip == HP100_CHIPID_RAINIER)
		    || (lp->chip == HP100_CHIPID_SHASTA)) {
			int pdl_stop;

			/*
			 * Each pdl is 508 bytes long. (63 frags * 4 bytes for address and
			 * 4 bytes for header). We will leave NUM_RXPDLS * 508 (rounded
			 * to the next higher 1k boundary) bytes for the rx-pdl's
			 * Note: For non-etr chips the transmit stop register must be
			 * programmed on a 1k boundary, i.e. bits 9:0 must be zero. 
			 */
			pdl_stop = lp->memory_size;
			xmit_stop = (pdl_stop - 508 * (MAX_RX_PDL) - 16) & ~(0x03ff);
			recv_stop = (xmit_stop * (lp->rx_ratio) / 100) & ~(0x03ff);
			hp100_outw((pdl_stop >> 4) - 1, PDL_MEM_STOP);
#ifdef HP100_DEBUG_BM
			printk("hp100: %s: PDL_STOP = 0x%x\n", dev->name, pdl_stop);
#endif
		} else {
			/* ETR chip (Lassen) in busmaster mode */
			xmit_stop = (lp->memory_size) - 1;
			recv_stop = ((lp->memory_size * lp->rx_ratio) / 100) & ~(0x03ff);
		}

		hp100_outw(xmit_stop >> 4, TX_MEM_STOP);
		hp100_outw(recv_stop >> 4, RX_MEM_STOP);
#ifdef HP100_DEBUG_BM
		printk("hp100: %s: TX_STOP  = 0x%x\n", dev->name, xmit_stop >> 4);
		printk("hp100: %s: RX_STOP  = 0x%x\n", dev->name, recv_stop >> 4);
#endif
	} else {
		/* Slave modes (memory mapped and programmed io)  */
		hp100_outw((((lp->memory_size * lp->rx_ratio) / 100) >> 4), RX_MEM_STOP);
		hp100_outw(((lp->memory_size - 1) >> 4), TX_MEM_STOP);
#ifdef HP100_DEBUG
		printk("hp100: %s: TX_MEM_STOP: 0x%x\n", dev->name, hp100_inw(TX_MEM_STOP));
		printk("hp100: %s: RX_MEM_STOP: 0x%x\n", dev->name, hp100_inw(RX_MEM_STOP));
#endif
	}

	/* Write MAC address into page 1 */
	hp100_page(MAC_ADDRESS);
	for (i = 0; i < 6; i++)
		hp100_outb(dev->dev_addr[i], MAC_ADDR + i);

	/* Zero the multicast hash registers */
	for (i = 0; i < 8; i++)
		hp100_outb(0x0, HASH_BYTE0 + i);

	/* Set up MAC defaults */
	hp100_page(MAC_CTRL);

	/* Go to LAN Page and zero all filter bits */
	/* Zero accept error, accept multicast, accept broadcast and accept */
	/* all directed packet bits */
	hp100_andb(~(HP100_RX_EN |
		     HP100_TX_EN |
		     HP100_ACC_ERRORED |
		     HP100_ACC_MC |
		     HP100_ACC_BC | HP100_ACC_PHY), MAC_CFG_1);

	hp100_outb(0x00, MAC_CFG_2);

	/* Zero the frame format bit. This works around a training bug in the */
	/* new hubs. */
	hp100_outb(0x00, VG_LAN_CFG_2);	/* (use 802.3) */

	if (lp->priority_tx)
		hp100_outb(HP100_PRIORITY_TX | HP100_SET_LB, OPTION_MSW);
	else
		hp100_outb(HP100_PRIORITY_TX | HP100_RESET_LB, OPTION_MSW);

	hp100_outb(HP100_ADV_NXT_PKT |
		   HP100_TX_CMD | HP100_RESET_LB, OPTION_MSW);

	/* If busmaster, initialize the PDLs */
	if (lp->mode == 1)
		hp100_init_pdls(dev);

	/* Go to performance page and initalize isr and imr registers */
	hp100_page(PERFORMANCE);
	hp100_outw(0xfefe, IRQ_MASK);	/* mask off all ints */
	hp100_outw(0xffff, IRQ_STATUS);	/* ack IRQ */
}

/*
 *  open/close functions
 */

static int hp100_open(struct net_device *dev)
{
	struct hp100_private *lp = netdev_priv(dev);
#ifdef HP100_DEBUG_B
	int ioaddr = dev->base_addr;
#endif

#ifdef HP100_DEBUG_B
	hp100_outw(0x4204, TRACE);
	printk("hp100: %s: open\n", dev->name);
#endif

	/* New: if bus is PCI or EISA, interrupts might be shared interrupts */
	if (request_irq(dev->irq, hp100_interrupt,
			lp->bus == HP100_BUS_PCI || lp->bus ==
			HP100_BUS_EISA ? SA_SHIRQ : SA_INTERRUPT,
			"hp100", dev)) {
		printk("hp100: %s: unable to get IRQ %d\n", dev->name, dev->irq);
		return -EAGAIN;
	}

	dev->trans_start = jiffies;
	netif_start_queue(dev);

	lp->lan_type = hp100_sense_lan(dev);
	lp->mac1_mode = HP100_MAC1MODE3;
	lp->mac2_mode = HP100_MAC2MODE3;
	memset(&lp->hash_bytes, 0x00, 8);

	hp100_stop_interface(dev);

	hp100_hwinit(dev);

	hp100_start_interface(dev);	/* sets mac modes, enables interrupts */

	return 0;
}

/* The close function is called when the interface is to be brought down */
static int hp100_close(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	struct hp100_private *lp = netdev_priv(dev);

#ifdef HP100_DEBUG_B
	hp100_outw(0x4205, TRACE);
	printk("hp100: %s: close\n", dev->name);
#endif

	hp100_page(PERFORMANCE);
	hp100_outw(0xfefe, IRQ_MASK);	/* mask off all IRQs */

	hp100_stop_interface(dev);

	if (lp->lan_type == HP100_LAN_100)
		lp->hub_status = hp100_login_to_vg_hub(dev, 0);

	netif_stop_queue(dev);

	free_irq(dev->irq, dev);

#ifdef HP100_DEBUG
	printk("hp100: %s: close LSW = 0x%x\n", dev->name,
	       hp100_inw(OPTION_LSW));
#endif

	return 0;
}


/*
 * Configure the PDL Rx rings and LAN 
 */
static void hp100_init_pdls(struct net_device *dev)
{
	struct hp100_private *lp = netdev_priv(dev);
	hp100_ring_t *ringptr;
	u_int *pageptr;		/* Warning : increment by 4 - Jean II */
	int i;

#ifdef HP100_DEBUG_B
	int ioaddr = dev->base_addr;
#endif

#ifdef HP100_DEBUG_B
	hp100_outw(0x4206, TRACE);
	printk("hp100: %s: init pdls\n", dev->name);
#endif

	if (0 == lp->page_vaddr_algn)
		printk("hp100: %s: Warning: lp->page_vaddr_algn not initialised!\n", dev->name);
	else {
		/* pageptr shall point into the DMA accessible memory region  */
		/* we use this pointer to status the upper limit of allocated */
		/* memory in the allocated page. */
		/* note: align the pointers to the pci cache line size */
		memset(lp->page_vaddr_algn, 0, MAX_RINGSIZE);	/* Zero  Rx/Tx ring page */
		pageptr = lp->page_vaddr_algn;

		lp->rxrcommit = 0;
		ringptr = lp->rxrhead = lp->rxrtail = &(lp->rxring[0]);

		/* Initialise Rx Ring */
		for (i = MAX_RX_PDL - 1; i >= 0; i--) {
			lp->rxring[i].next = ringptr;
			ringptr = &(lp->rxring[i]);
			pageptr += hp100_init_rxpdl(dev, ringptr, pageptr);
		}

		/* Initialise Tx Ring */
		lp->txrcommit = 0;
		ringptr = lp->txrhead = lp->txrtail = &(lp->txring[0]);
		for (i = MAX_TX_PDL - 1; i >= 0; i--) {
			lp->txring[i].next = ringptr;
			ringptr = &(lp->txring[i]);
			pageptr += hp100_init_txpdl(dev, ringptr, pageptr);
		}
	}
}


/* These functions "format" the entries in the pdl structure   */
/* They return how much memory the fragments need.            */
static int hp100_init_rxpdl(struct net_device *dev,
			    register hp100_ring_t * ringptr,
			    register u32 * pdlptr)
{
	/* pdlptr is starting address for this pdl */

	if (0 != (((unsigned long) pdlptr) & 0xf))
		printk("hp100: %s: Init rxpdl: Unaligned pdlptr 0x%lx.\n",
		       dev->name, (unsigned long) pdlptr);

	ringptr->pdl = pdlptr + 1;
	ringptr->pdl_paddr = virt_to_whatever(dev, pdlptr + 1);
	ringptr->skb = (void *) NULL;

	/* 
	 * Write address and length of first PDL Fragment (which is used for
	 * storing the RX-Header
	 * We use the 4 bytes _before_ the PDH in the pdl memory area to 
	 * store this information. (PDH is at offset 0x04)
	 */
	/* Note that pdlptr+1 and not pdlptr is the pointer to the PDH */

	*(pdlptr + 2) = (u_int) virt_to_whatever(dev, pdlptr);	/* Address Frag 1 */
	*(pdlptr + 3) = 4;	/* Length  Frag 1 */

	return ((((MAX_RX_FRAG * 2 + 2) + 3) / 4) * 4);
}


static int hp100_init_txpdl(struct net_device *dev,
			    register hp100_ring_t * ringptr,
			    register u32 * pdlptr)
{
	if (0 != (((unsigned long) pdlptr) & 0xf))
		printk("hp100: %s: Init txpdl: Unaligned pdlptr 0x%lx.\n", dev->name, (unsigned long) pdlptr);

	ringptr->pdl = pdlptr;	/* +1; */
	ringptr->pdl_paddr = virt_to_whatever(dev, pdlptr);	/* +1 */
	ringptr->skb = (void *) NULL;

	return ((((MAX_TX_FRAG * 2 + 2) + 3) / 4) * 4);
}

/*
 * hp100_build_rx_pdl allocates an skb_buff of maximum size plus two bytes 
 * for possible odd word alignment rounding up to next dword and set PDL
 * address for fragment#2 
 * Returns: 0 if unable to allocate skb_buff
 *          1 if successful
 */
static int hp100_build_rx_pdl(hp100_ring_t * ringptr,
			      struct net_device *dev)
{
#ifdef HP100_DEBUG_B
	int ioaddr = dev->base_addr;
#endif
#ifdef HP100_DEBUG_BM
	u_int *p;
#endif

#ifdef HP100_DEBUG_B
	hp100_outw(0x4207, TRACE);
	printk("hp100: %s: build rx pdl\n", dev->name);
#endif

	/* Allocate skb buffer of maximum size */
	/* Note: This depends on the alloc_skb functions allocating more 
	 * space than requested, i.e. aligning to 16bytes */

	ringptr->skb = dev_alloc_skb(((MAX_ETHER_SIZE + 2 + 3) / 4) * 4);

	if (NULL != ringptr->skb) {
		/* 
		 * Reserve 2 bytes at the head of the buffer to land the IP header
		 * on a long word boundary (According to the Network Driver section
		 * in the Linux KHG, this should help to increase performance.)
		 */
		skb_reserve(ringptr->skb, 2);

		ringptr->skb->dev = dev;
		ringptr->skb->data = (u_char *) skb_put(ringptr->skb, MAX_ETHER_SIZE);

		/* ringptr->pdl points to the beginning of the PDL, i.e. the PDH */
		/* Note: 1st Fragment is used for the 4 byte packet status
		 * (receive header). Its PDL entries are set up by init_rxpdl. So 
		 * here we only have to set up the PDL fragment entries for the data
		 * part. Those 4 bytes will be stored in the DMA memory region 
		 * directly before the PDL. 
		 */
#ifdef HP100_DEBUG_BM
		printk("hp100: %s: build_rx_pdl: PDH@0x%x, skb->data (len %d) at 0x%x\n",
				     dev->name, (u_int) ringptr->pdl,
				     ((MAX_ETHER_SIZE + 2 + 3) / 4) * 4,
				     (unsigned int) ringptr->skb->data);
#endif

		/* Conversion to new PCI API : map skbuf data to PCI bus.
		 * Doc says it's OK for EISA as well - Jean II */
		ringptr->pdl[0] = 0x00020000;	/* Write PDH */
		ringptr->pdl[3] = pdl_map_data(netdev_priv(dev), 
					       ringptr->skb->data);
		ringptr->pdl[4] = MAX_ETHER_SIZE;	/* Length of Data */

#ifdef HP100_DEBUG_BM
		for (p = (ringptr->pdl); p < (ringptr->pdl + 5); p++)
			printk("hp100: %s: Adr 0x%.8x = 0x%.8x\n", dev->name, (u_int) p, (u_int) * p);
#endif
		return (1);
	}
	/* else: */
	/* alloc_skb failed (no memory) -> still can receive the header
	 * fragment into PDL memory. make PDL safe by clearing msgptr and
	 * making the PDL only 1 fragment (i.e. the 4 byte packet status)
	 */
#ifdef HP100_DEBUG_BM
	printk("hp100: %s: build_rx_pdl: PDH@0x%x, No space for skb.\n", dev->name, (u_int) ringptr->pdl);
#endif

	ringptr->pdl[0] = 0x00010000;	/* PDH: Count=1 Fragment */

	return (0);
}

/*
 *  hp100_rxfill - attempt to fill the Rx Ring will empty skb's
 *
 * Makes assumption that skb's are always contiguous memory areas and
 * therefore PDLs contain only 2 physical fragments.
 * -  While the number of Rx PDLs with buffers is less than maximum
 *      a.  Get a maximum packet size skb
 *      b.  Put the physical address of the buffer into the PDL.
 *      c.  Output physical address of PDL to adapter.
 */
static void hp100_rxfill(struct net_device *dev)
{
	int ioaddr = dev->base_addr;

	struct hp100_private *lp = netdev_priv(dev);
	hp100_ring_t *ringptr;

#ifdef HP100_DEBUG_B
	hp100_outw(0x4208, TRACE);
	printk("hp100: %s: rxfill\n", dev->name);
#endif

	hp100_page(PERFORMANCE);

	while (lp->rxrcommit < MAX_RX_PDL) {
		/*
		   ** Attempt to get a buffer and build a Rx PDL.
		 */
		ringptr = lp->rxrtail;
		if (0 == hp100_build_rx_pdl(ringptr, dev)) {
			return;	/* None available, return */
		}

		/* Hand this PDL over to the card */
		/* Note: This needs performance page selected! */
#ifdef HP100_DEBUG_BM
		printk("hp100: %s: rxfill: Hand to card: pdl #%d @0x%x phys:0x%x, buffer: 0x%x\n",
				     dev->name, lp->rxrcommit, (u_int) ringptr->pdl,
				     (u_int) ringptr->pdl_paddr, (u_int) ringptr->pdl[3]);
#endif

		hp100_outl((u32) ringptr->pdl_paddr, RX_PDA);

		lp->rxrcommit += 1;
		lp->rxrtail = ringptr->next;
	}
}

/*
 * BM_shutdown - shutdown bus mastering and leave chip in reset state
 */

static void hp100_BM_shutdown(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	struct hp100_private *lp = netdev_priv(dev);
	unsigned long time;

#ifdef HP100_DEBUG_B
	hp100_outw(0x4209, TRACE);
	printk("hp100: %s: bm shutdown\n", dev->name);
#endif

	hp100_page(PERFORMANCE);
	hp100_outw(0xfefe, IRQ_MASK);	/* mask off all ints */
	hp100_outw(0xffff, IRQ_STATUS);	/* Ack all ints */

	/* Ensure Interrupts are off */
	hp100_outw(HP100_INT_EN | HP100_RESET_LB, OPTION_LSW);

	/* Disable all MAC activity */
	hp100_page(MAC_CTRL);
	hp100_andb(~(HP100_RX_EN | HP100_TX_EN), MAC_CFG_1);	/* stop rx/tx */

	/* If cascade MMU is not already in reset */
	if (0 != (hp100_inw(OPTION_LSW) & HP100_HW_RST)) {
		/* Wait 1.3ms (10Mb max packet time) to ensure MAC is idle so
		 * MMU pointers will not be reset out from underneath
		 */
		hp100_page(MAC_CTRL);
		for (time = 0; time < 5000; time++) {
			if ((hp100_inb(MAC_CFG_1) & (HP100_TX_IDLE | HP100_RX_IDLE)) == (HP100_TX_IDLE | HP100_RX_IDLE))
				break;
		}

		/* Shutdown algorithm depends on the generation of Cascade */
		if (lp->chip == HP100_CHIPID_LASSEN) {	/* ETR shutdown/reset */
			/* Disable Busmaster mode and wait for bit to go to zero. */
			hp100_page(HW_MAP);
			hp100_andb(~HP100_BM_MASTER, BM);
			/* 100 ms timeout */
			for (time = 0; time < 32000; time++) {
				if (0 == (hp100_inb(BM) & HP100_BM_MASTER))
					break;
			}
		} else {	/* Shasta or Rainier Shutdown/Reset */
			/* To ensure all bus master inloading activity has ceased,
			 * wait for no Rx PDAs or no Rx packets on card. 
			 */
			hp100_page(PERFORMANCE);
			/* 100 ms timeout */
			for (time = 0; time < 10000; time++) {
				/* RX_PDL: PDLs not executed. */
				/* RX_PKT_CNT: RX'd packets on card. */
				if ((hp100_inb(RX_PDL) == 0) && (hp100_inb(RX_PKT_CNT) == 0))
					break;
			}

			if (time >= 10000)
				printk("hp100: %s: BM shutdown error.\n", dev->name);

			/* To ensure all bus master outloading activity has ceased,
			 * wait until the Tx PDA count goes to zero or no more Tx space
			 * available in the Tx region of the card. 
			 */
			/* 100 ms timeout */
			for (time = 0; time < 10000; time++) {
				if ((0 == hp100_inb(TX_PKT_CNT)) &&
				    (0 != (hp100_inb(TX_MEM_FREE) & HP100_AUTO_COMPARE)))
					break;
			}

			/* Disable Busmaster mode */
			hp100_page(HW_MAP);
			hp100_andb(~HP100_BM_MASTER, BM);
		}	/* end of shutdown procedure for non-etr parts */

		hp100_cascade_reset(dev, 1);
	}
	hp100_page(PERFORMANCE);
	/* hp100_outw( HP100_BM_READ | HP100_BM_WRITE | HP100_RESET_HB, OPTION_LSW ); */
	/* Busmaster mode should be shut down now. */
}

static int hp100_check_lan(struct net_device *dev)
{
	struct hp100_private *lp = netdev_priv(dev);

	if (lp->lan_type < 0) {	/* no LAN type detected yet? */
		hp100_stop_interface(dev);
		if ((lp->lan_type = hp100_sense_lan(dev)) < 0) {
			printk("hp100: %s: no connection found - check wire\n", dev->name);
			hp100_start_interface(dev);	/* 10Mb/s RX packets maybe handled */
			return -EIO;
		}
		if (lp->lan_type == HP100_LAN_100)
			lp->hub_status = hp100_login_to_vg_hub(dev, 0);	/* relogin */
		hp100_start_interface(dev);
	}
	return 0;
}

/* 
 *  transmit functions
 */

/* tx function for busmaster mode */
static int hp100_start_xmit_bm(struct sk_buff *skb, struct net_device *dev)
{
	unsigned long flags;
	int i, ok_flag;
	int ioaddr = dev->base_addr;
	struct hp100_private *lp = netdev_priv(dev);
	hp100_ring_t *ringptr;

#ifdef HP100_DEBUG_B
	hp100_outw(0x4210, TRACE);
	printk("hp100: %s: start_xmit_bm\n", dev->name);
#endif

	if (skb == NULL) {
		return 0;
	}

	if (skb->len <= 0)
		return 0;
		
	if (skb->len < ETH_ZLEN && lp->chip == HP100_CHIPID_SHASTA) {
		skb = skb_padto(skb, ETH_ZLEN);
		if (skb == NULL)
			return 0;
	}

	/* Get Tx ring tail pointer */
	if (lp->txrtail->next == lp->txrhead) {
		/* No memory. */
#ifdef HP100_DEBUG
		printk("hp100: %s: start_xmit_bm: No TX PDL available.\n", dev->name);
#endif
		/* not waited long enough since last tx? */
		if (jiffies - dev->trans_start < HZ)
			return -EAGAIN;

		if (hp100_check_lan(dev))
			return -EIO;

		if (lp->lan_type == HP100_LAN_100 && lp->hub_status < 0) {
			/* we have a 100Mb/s adapter but it isn't connected to hub */
			printk("hp100: %s: login to 100Mb/s hub retry\n", dev->name);
			hp100_stop_interface(dev);
			lp->hub_status = hp100_login_to_vg_hub(dev, 0);
			hp100_start_interface(dev);
		} else {
			spin_lock_irqsave(&lp->lock, flags);
			hp100_ints_off();	/* Useful ? Jean II */
			i = hp100_sense_lan(dev);
			hp100_ints_on();
			spin_unlock_irqrestore(&lp->lock, flags);
			if (i == HP100_LAN_ERR)
				printk("hp100: %s: link down detected\n", dev->name);
			else if (lp->lan_type != i) {	/* cable change! */
				/* it's very hard - all network settings must be changed!!! */
				printk("hp100: %s: cable change 10Mb/s <-> 100Mb/s detected\n", dev->name);
				lp->lan_type = i;
				hp100_stop_interface(dev);
				if (lp->lan_type == HP100_LAN_100)
					lp->hub_status = hp100_login_to_vg_hub(dev, 0);
				hp100_start_interface(dev);
			} else {
				printk("hp100: %s: interface reset\n", dev->name);
				hp100_stop_interface(dev);
				if (lp->lan_type == HP100_LAN_100)
					lp->hub_status = hp100_login_to_vg_hub(dev, 0);
				hp100_start_interface(dev);
			}
		}

		dev->trans_start = jiffies;
		return -EAGAIN;
	}

	/*
	 * we have to turn int's off before modifying this, otherwise
	 * a tx_pdl_cleanup could occur at the same time
	 */
	spin_lock_irqsave(&lp->lock, flags);
	ringptr = lp->txrtail;
	lp->txrtail = ringptr->next;

	/* Check whether packet has minimal packet size */
	ok_flag = skb->len >= HP100_MIN_PACKET_SIZE;
	i = ok_flag ? skb->len : HP100_MIN_PACKET_SIZE;

	ringptr->skb = skb;
	ringptr->pdl[0] = ((1 << 16) | i);	/* PDH: 1 Fragment & length */
	if (lp->chip == HP100_CHIPID_SHASTA) {
		/* TODO:Could someone who has the EISA card please check if this works? */
		ringptr->pdl[2] = i;
	} else {		/* Lassen */
		/* In the PDL, don't use the padded size but the real packet size: */
		ringptr->pdl[2] = skb->len;	/* 1st Frag: Length of frag */
	}
	/* Conversion to new PCI API : map skbuf data to PCI bus.
	 * Doc says it's OK for EISA as well - Jean II */
	ringptr->pdl[1] = ((u32) pci_map_single(lp->pci_dev, skb->data, ringptr->pdl[2], PCI_DMA_TODEVICE));	/* 1st Frag: Adr. of data */

	/* Hand this PDL to the card. */
	hp100_outl(ringptr->pdl_paddr, TX_PDA_L);	/* Low Prio. Queue */

	lp->txrcommit++;
	spin_unlock_irqrestore(&lp->lock, flags);

	/* Update statistics */
	lp->stats.tx_packets++;
	lp->stats.tx_bytes += skb->len;
	dev->trans_start = jiffies;

	return 0;
}


/* clean_txring checks if packets have been sent by the card by reading
 * the TX_PDL register from the performance page and comparing it to the
 * number of commited packets. It then frees the skb's of the packets that
 * obviously have been sent to the network.
 *
 * Needs the PERFORMANCE page selected. 
 */
static void hp100_clean_txring(struct net_device *dev)
{
	struct hp100_private *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;
	int donecount;

#ifdef HP100_DEBUG_B
	hp100_outw(0x4211, TRACE);
	printk("hp100: %s: clean txring\n", dev->name);
#endif

	/* How many PDLs have been transmitted? */
	donecount = (lp->txrcommit) - hp100_inb(TX_PDL);

#ifdef HP100_DEBUG
	if (donecount > MAX_TX_PDL)
		printk("hp100: %s: Warning: More PDLs transmitted than commited to card???\n", dev->name);
#endif

	for (; 0 != donecount; donecount--) {
#ifdef HP100_DEBUG_BM
		printk("hp100: %s: Free skb: data @0x%.8x txrcommit=0x%x TXPDL=0x%x, done=0x%x\n",
				dev->name, (u_int) lp->txrhead->skb->data,
				lp->txrcommit, hp100_inb(TX_PDL), donecount);
#endif
		/* Conversion to new PCI API : NOP */
		pci_unmap_single(lp->pci_dev, (dma_addr_t) lp->txrhead->pdl[1], lp->txrhead->pdl[2], PCI_DMA_TODEVICE);
		dev_kfree_skb_any(lp->txrhead->skb);
		lp->txrhead->skb = (void *) NULL;
		lp->txrhead = lp->txrhead->next;
		lp->txrcommit--;
	}
}

/* tx function for slave modes */
static int hp100_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	unsigned long flags;
	int i, ok_flag;
	int ioaddr = dev->base_addr;
	u_short val;
	struct hp100_private *lp = netdev_priv(dev);

#ifdef HP100_DEBUG_B
	hp100_outw(0x4212, TRACE);
	printk("hp100: %s: start_xmit\n", dev->name);
#endif

	if (skb == NULL) {
		return 0;
	}

	if (skb->len <= 0)
		return 0;

	if (hp100_check_lan(dev))
		return -EIO;

	/* If there is not enough free memory on the card... */
	i = hp100_inl(TX_MEM_FREE) & 0x7fffffff;
	if (!(((i / 2) - 539) > (skb->len + 16) && (hp100_inb(TX_PKT_CNT) < 255))) {
#ifdef HP100_DEBUG
		printk("hp100: %s: start_xmit: tx free mem = 0x%x\n", dev->name, i);
#endif
		/* not waited long enough since last failed tx try? */
		if (jiffies - dev->trans_start < HZ) {
#ifdef HP100_DEBUG
			printk("hp100: %s: trans_start timing problem\n",
			       dev->name);
#endif
			return -EAGAIN;
		}
		if (lp->lan_type == HP100_LAN_100 && lp->hub_status < 0) {
			/* we have a 100Mb/s adapter but it isn't connected to hub */
			printk("hp100: %s: login to 100Mb/s hub retry\n", dev->name);
			hp100_stop_interface(dev);
			lp->hub_status = hp100_login_to_vg_hub(dev, 0);
			hp100_start_interface(dev);
		} else {
			spin_lock_irqsave(&lp->lock, flags);
			hp100_ints_off();	/* Useful ? Jean II */
			i = hp100_sense_lan(dev);
			hp100_ints_on();
			spin_unlock_irqrestore(&lp->lock, flags);
			if (i == HP100_LAN_ERR)
				printk("hp100: %s: link down detected\n", dev->name);
			else if (lp->lan_type != i) {	/* cable change! */
				/* it's very hard - all network setting must be changed!!! */
				printk("hp100: %s: cable change 10Mb/s <-> 100Mb/s detected\n", dev->name);
				lp->lan_type = i;
				hp100_stop_interface(dev);
				if (lp->lan_type == HP100_LAN_100)
					lp->hub_status = hp100_login_to_vg_hub(dev, 0);
				hp100_start_interface(dev);
			} else {
				printk("hp100: %s: interface reset\n", dev->name);
				hp100_stop_interface(dev);
				if (lp->lan_type == HP100_LAN_100)
					lp->hub_status = hp100_login_to_vg_hub(dev, 0);
				hp100_start_interface(dev);
				mdelay(1);
			}
		}
		dev->trans_start = jiffies;
		return -EAGAIN;
	}

	for (i = 0; i < 6000 && (hp100_inb(OPTION_MSW) & HP100_TX_CMD); i++) {
#ifdef HP100_DEBUG_TX
		printk("hp100: %s: start_xmit: busy\n", dev->name);
#endif
	}

	spin_lock_irqsave(&lp->lock, flags);
	hp100_ints_off();
	val = hp100_inw(IRQ_STATUS);
	/* Ack / clear the interrupt TX_COMPLETE interrupt - this interrupt is set
	 * when the current packet being transmitted on the wire is completed. */
	hp100_outw(HP100_TX_COMPLETE, IRQ_STATUS);
#ifdef HP100_DEBUG_TX
	printk("hp100: %s: start_xmit: irq_status=0x%.4x, irqmask=0x%.4x, len=%d\n",
			dev->name, val, hp100_inw(IRQ_MASK), (int) skb->len);
#endif

	ok_flag = skb->len >= HP100_MIN_PACKET_SIZE;
	i = ok_flag ? skb->len : HP100_MIN_PACKET_SIZE;

	hp100_outw(i, DATA32);	/* tell card the total packet length */
	hp100_outw(i, FRAGMENT_LEN);	/* and first/only fragment length    */

	if (lp->mode == 2) {	/* memory mapped */
		if (lp->mem_ptr_virt) {	/* high pci memory was remapped */
			/* Note: The J2585B needs alignment to 32bits here!  */
			memcpy_toio(lp->mem_ptr_virt, skb->data, (skb->len + 3) & ~3);
			if (!ok_flag)
				memset_io(lp->mem_ptr_virt, 0, HP100_MIN_PACKET_SIZE - skb->len);
		} else {
			/* Note: The J2585B needs alignment to 32bits here!  */
			isa_memcpy_toio(lp->mem_ptr_phys, skb->data, (skb->len + 3) & ~3);
			if (!ok_flag)
				isa_memset_io(lp->mem_ptr_phys, 0, HP100_MIN_PACKET_SIZE - skb->len);
		}
	} else {		/* programmed i/o */
		outsl(ioaddr + HP100_REG_DATA32, skb->data,
		      (skb->len + 3) >> 2);
		if (!ok_flag)
			for (i = (skb->len + 3) & ~3; i < HP100_MIN_PACKET_SIZE; i += 4)
				hp100_outl(0, DATA32);
	}

	hp100_outb(HP100_TX_CMD | HP100_SET_LB, OPTION_MSW);	/* send packet */

	lp->stats.tx_packets++;
	lp->stats.tx_bytes += skb->len;
	dev->trans_start = jiffies;
	hp100_ints_on();
	spin_unlock_irqrestore(&lp->lock, flags);

	dev_kfree_skb_any(skb);

#ifdef HP100_DEBUG_TX
	printk("hp100: %s: start_xmit: end\n", dev->name);
#endif

	return 0;
}


/*
 * Receive Function (Non-Busmaster mode)
 * Called when an "Receive Packet" interrupt occurs, i.e. the receive 
 * packet counter is non-zero.
 * For non-busmaster, this function does the whole work of transfering
 * the packet to the host memory and then up to higher layers via skb
 * and netif_rx. 
 */

static void hp100_rx(struct net_device *dev)
{
	int packets, pkt_len;
	int ioaddr = dev->base_addr;
	struct hp100_private *lp = netdev_priv(dev);
	u_int header;
	struct sk_buff *skb;

#ifdef DEBUG_B
	hp100_outw(0x4213, TRACE);
	printk("hp100: %s: rx\n", dev->name);
#endif

	/* First get indication of received lan packet */
	/* RX_PKT_CND indicates the number of packets which have been fully */
	/* received onto the card but have not been fully transferred of the card */
	packets = hp100_inb(RX_PKT_CNT);
#ifdef HP100_DEBUG_RX
	if (packets > 1)
		printk("hp100: %s: rx: waiting packets = %d\n", dev->name, packets);
#endif

	while (packets-- > 0) {
		/* If ADV_NXT_PKT is still set, we have to wait until the card has */
		/* really advanced to the next packet. */
		for (pkt_len = 0; pkt_len < 6000 && (hp100_inb(OPTION_MSW) & HP100_ADV_NXT_PKT); pkt_len++) {
#ifdef HP100_DEBUG_RX
			printk ("hp100: %s: rx: busy, remaining packets = %d\n", dev->name, packets);
#endif
		}

		/* First we get the header, which contains information about the */
		/* actual length of the received packet. */
		if (lp->mode == 2) {	/* memory mapped mode */
			if (lp->mem_ptr_virt)	/* if memory was remapped */
				header = readl(lp->mem_ptr_virt);
			else
				header = isa_readl(lp->mem_ptr_phys);
		} else		/* programmed i/o */
			header = hp100_inl(DATA32);

		pkt_len = ((header & HP100_PKT_LEN_MASK) + 3) & ~3;

#ifdef HP100_DEBUG_RX
		printk("hp100: %s: rx: new packet - length=%d, errors=0x%x, dest=0x%x\n",
				     dev->name, header & HP100_PKT_LEN_MASK,
				     (header >> 16) & 0xfff8, (header >> 16) & 7);
#endif

		/* Now we allocate the skb and transfer the data into it. */
		skb = dev_alloc_skb(pkt_len+2);
		if (skb == NULL) {	/* Not enough memory->drop packet */
#ifdef HP100_DEBUG
			printk("hp100: %s: rx: couldn't allocate a sk_buff of size %d\n",
					     dev->name, pkt_len);
#endif
			lp->stats.rx_dropped++;
		} else {	/* skb successfully allocated */

			u_char *ptr;

			skb_reserve(skb,2);
			skb->dev = dev;

			/* ptr to start of the sk_buff data area */
			skb_put(skb, pkt_len);
			ptr = skb->data;

			/* Now transfer the data from the card into that area */
			if (lp->mode == 2) {
				if (lp->mem_ptr_virt)
					memcpy_fromio(ptr, lp->mem_ptr_virt,pkt_len);
				/* Note alignment to 32bit transfers */
				else
					isa_memcpy_fromio(ptr, lp->mem_ptr_phys, pkt_len);
			} else	/* io mapped */
				insl(ioaddr + HP100_REG_DATA32, ptr, pkt_len >> 2);

			skb->protocol = eth_type_trans(skb, dev);

#ifdef HP100_DEBUG_RX
			printk("hp100: %s: rx: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
					dev->name, ptr[0], ptr[1], ptr[2], ptr[3],
		 			ptr[4], ptr[5], ptr[6], ptr[7], ptr[8],
					ptr[9], ptr[10], ptr[11]);
#endif
			netif_rx(skb);
			dev->last_rx = jiffies;
			lp->stats.rx_packets++;
			lp->stats.rx_bytes += pkt_len;
		}

		/* Indicate the card that we have got the packet */
		hp100_outb(HP100_ADV_NXT_PKT | HP100_SET_LB, OPTION_MSW);

		switch (header & 0x00070000) {
		case (HP100_MULTI_ADDR_HASH << 16):
		case (HP100_MULTI_ADDR_NO_HASH << 16):
			lp->stats.multicast++;
			break;
		}
	}			/* end of while(there are packets) loop */
#ifdef HP100_DEBUG_RX
	printk("hp100_rx: %s: end\n", dev->name);
#endif
}

/* 
 * Receive Function for Busmaster Mode
 */
static void hp100_rx_bm(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	struct hp100_private *lp = netdev_priv(dev);
	hp100_ring_t *ptr;
	u_int header;
	int pkt_len;

#ifdef HP100_DEBUG_B
	hp100_outw(0x4214, TRACE);
	printk("hp100: %s: rx_bm\n", dev->name);
#endif

#ifdef HP100_DEBUG
	if (0 == lp->rxrcommit) {
		printk("hp100: %s: rx_bm called although no PDLs were committed to adapter?\n", dev->name);
		return;
	} else
		/* RX_PKT_CNT states how many PDLs are currently formatted and available to 
		 * the cards BM engine */
	if ((hp100_inw(RX_PKT_CNT) & 0x00ff) >= lp->rxrcommit) {
		printk("hp100: %s: More packets received than commited? RX_PKT_CNT=0x%x, commit=0x%x\n",
				     dev->name, hp100_inw(RX_PKT_CNT) & 0x00ff,
				     lp->rxrcommit);
		return;
	}
#endif

	while ((lp->rxrcommit > hp100_inb(RX_PDL))) {
		/*
		 * The packet was received into the pdl pointed to by lp->rxrhead (
		 * the oldest pdl in the ring 
		 */

		/* First we get the header, which contains information about the */
		/* actual length of the received packet. */

		ptr = lp->rxrhead;

		header = *(ptr->pdl - 1);
		pkt_len = (header & HP100_PKT_LEN_MASK);

		/* Conversion to new PCI API : NOP */
		pci_unmap_single(lp->pci_dev, (dma_addr_t) ptr->pdl[3], MAX_ETHER_SIZE, PCI_DMA_FROMDEVICE);

#ifdef HP100_DEBUG_BM
		printk("hp100: %s: rx_bm: header@0x%x=0x%x length=%d, errors=0x%x, dest=0x%x\n",
				dev->name, (u_int) (ptr->pdl - 1), (u_int) header,
				pkt_len, (header >> 16) & 0xfff8, (header >> 16) & 7);
		printk("hp100: %s: RX_PDL_COUNT:0x%x TX_PDL_COUNT:0x%x, RX_PKT_CNT=0x%x PDH=0x%x, Data@0x%x len=0x%x\n",
		   		dev->name, hp100_inb(RX_PDL), hp100_inb(TX_PDL),
				hp100_inb(RX_PKT_CNT), (u_int) * (ptr->pdl),
				(u_int) * (ptr->pdl + 3), (u_int) * (ptr->pdl + 4));
#endif

		if ((pkt_len >= MIN_ETHER_SIZE) &&
		    (pkt_len <= MAX_ETHER_SIZE)) {
			if (ptr->skb == NULL) {
				printk("hp100: %s: rx_bm: skb null\n", dev->name);
				/* can happen if we only allocated room for the pdh due to memory shortage. */
				lp->stats.rx_dropped++;
			} else {
				skb_trim(ptr->skb, pkt_len);	/* Shorten it */
				ptr->skb->protocol =
				    eth_type_trans(ptr->skb, dev);

				netif_rx(ptr->skb);	/* Up and away... */

				dev->last_rx = jiffies;
				lp->stats.rx_packets++;
				lp->stats.rx_bytes += pkt_len;
			}

			switch (header & 0x00070000) {
			case (HP100_MULTI_ADDR_HASH << 16):
			case (HP100_MULTI_ADDR_NO_HASH << 16):
				lp->stats.multicast++;
				break;
			}
		} else {
#ifdef HP100_DEBUG
			printk("hp100: %s: rx_bm: Received bad packet (length=%d)\n", dev->name, pkt_len);
#endif
			if (ptr->skb != NULL)
				dev_kfree_skb_any(ptr->skb);
			lp->stats.rx_errors++;
		}

		lp->rxrhead = lp->rxrhead->next;

		/* Allocate a new rx PDL (so lp->rxrcommit stays the same) */
		if (0 == hp100_build_rx_pdl(lp->rxrtail, dev)) {
			/* No space for skb, header can still be received. */
#ifdef HP100_DEBUG
			printk("hp100: %s: rx_bm: No space for new PDL.\n", dev->name);
#endif
			return;
		} else {	/* successfully allocated new PDL - put it in ringlist at tail. */
			hp100_outl((u32) lp->rxrtail->pdl_paddr, RX_PDA);
			lp->rxrtail = lp->rxrtail->next;
		}

	}
}

/*
 *  statistics
 */
static struct net_device_stats *hp100_get_stats(struct net_device *dev)
{
	unsigned long flags;
	int ioaddr = dev->base_addr;
	struct hp100_private *lp = netdev_priv(dev);

#ifdef HP100_DEBUG_B
	hp100_outw(0x4215, TRACE);
#endif

	spin_lock_irqsave(&lp->lock, flags);
	hp100_ints_off();	/* Useful ? Jean II */
	hp100_update_stats(dev);
	hp100_ints_on();
	spin_unlock_irqrestore(&lp->lock, flags);
	return &(lp->stats);
}

static void hp100_update_stats(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	u_short val;
	struct hp100_private *lp = netdev_priv(dev);

#ifdef HP100_DEBUG_B
	hp100_outw(0x4216, TRACE);
	printk("hp100: %s: update-stats\n", dev->name);
#endif

	/* Note: Statistics counters clear when read. */
	hp100_page(MAC_CTRL);
	val = hp100_inw(DROPPED) & 0x0fff;
	lp->stats.rx_errors += val;
	lp->stats.rx_over_errors += val;
	val = hp100_inb(CRC);
	lp->stats.rx_errors += val;
	lp->stats.rx_crc_errors += val;
	val = hp100_inb(ABORT);
	lp->stats.tx_errors += val;
	lp->stats.tx_aborted_errors += val;
	hp100_page(PERFORMANCE);
}

static void hp100_misc_interrupt(struct net_device *dev)
{
#ifdef HP100_DEBUG_B
	int ioaddr = dev->base_addr;
#endif
	struct hp100_private *lp = netdev_priv(dev);

#ifdef HP100_DEBUG_B
	int ioaddr = dev->base_addr;
	hp100_outw(0x4216, TRACE);
	printk("hp100: %s: misc_interrupt\n", dev->name);
#endif

	/* Note: Statistics counters clear when read. */
	lp->stats.rx_errors++;
	lp->stats.tx_errors++;
}

static void hp100_clear_stats(struct hp100_private *lp, int ioaddr)
{
	unsigned long flags;

#ifdef HP100_DEBUG_B
	hp100_outw(0x4217, TRACE);
	printk("hp100: %s: clear_stats\n", dev->name);
#endif

	spin_lock_irqsave(&lp->lock, flags);
	hp100_page(MAC_CTRL);	/* get all statistics bytes */
	hp100_inw(DROPPED);
	hp100_inb(CRC);
	hp100_inb(ABORT);
	hp100_page(PERFORMANCE);
	spin_unlock_irqrestore(&lp->lock, flags);
}


/*
 *  multicast setup
 */

/*
 *  Set or clear the multicast filter for this adapter.
 */

static void hp100_set_multicast_list(struct net_device *dev)
{
	unsigned long flags;
	int ioaddr = dev->base_addr;
	struct hp100_private *lp = netdev_priv(dev);

#ifdef HP100_DEBUG_B
	hp100_outw(0x4218, TRACE);
	printk("hp100: %s: set_mc_list\n", dev->name);
#endif

	spin_lock_irqsave(&lp->lock, flags);
	hp100_ints_off();
	hp100_page(MAC_CTRL);
	hp100_andb(~(HP100_RX_EN | HP100_TX_EN), MAC_CFG_1);	/* stop rx/tx */

	if (dev->flags & IFF_PROMISC) {
		lp->mac2_mode = HP100_MAC2MODE6;	/* promiscuous mode = get all good */
		lp->mac1_mode = HP100_MAC1MODE6;	/* packets on the net */
		memset(&lp->hash_bytes, 0xff, 8);
	} else if (dev->mc_count || (dev->flags & IFF_ALLMULTI)) {
		lp->mac2_mode = HP100_MAC2MODE5;	/* multicast mode = get packets for */
		lp->mac1_mode = HP100_MAC1MODE5;	/* me, broadcasts and all multicasts */
#ifdef HP100_MULTICAST_FILTER	/* doesn't work!!! */
		if (dev->flags & IFF_ALLMULTI) {
			/* set hash filter to receive all multicast packets */
			memset(&lp->hash_bytes, 0xff, 8);
		} else {
			int i, j, idx;
			u_char *addrs;
			struct dev_mc_list *dmi;

			memset(&lp->hash_bytes, 0x00, 8);
#ifdef HP100_DEBUG
			printk("hp100: %s: computing hash filter - mc_count = %i\n", dev->name, dev->mc_count);
#endif
			for (i = 0, dmi = dev->mc_list; i < dev->mc_count; i++, dmi = dmi->next) {
				addrs = dmi->dmi_addr;
				if ((*addrs & 0x01) == 0x01) {	/* multicast address? */
#ifdef HP100_DEBUG
					printk("hp100: %s: multicast = %02x:%02x:%02x:%02x:%02x:%02x, ",
						     dev->name, addrs[0], addrs[1], addrs[2],
						     addrs[3], addrs[4], addrs[5]);
#endif
					for (j = idx = 0; j < 6; j++) {
						idx ^= *addrs++ & 0x3f;
						printk(":%02x:", idx);
					}
#ifdef HP100_DEBUG
					printk("idx = %i\n", idx);
#endif
					lp->hash_bytes[idx >> 3] |= (1 << (idx & 7));
				}
			}
		}
#else
		memset(&lp->hash_bytes, 0xff, 8);
#endif
	} else {
		lp->mac2_mode = HP100_MAC2MODE3;	/* normal mode = get packets for me */
		lp->mac1_mode = HP100_MAC1MODE3;	/* and broadcasts */
		memset(&lp->hash_bytes, 0x00, 8);
	}

	if (((hp100_inb(MAC_CFG_1) & 0x0f) != lp->mac1_mode) ||
	    (hp100_inb(MAC_CFG_2) != lp->mac2_mode)) {
		int i;

		hp100_outb(lp->mac2_mode, MAC_CFG_2);
		hp100_andb(HP100_MAC1MODEMASK, MAC_CFG_1);	/* clear mac1 mode bits */
		hp100_orb(lp->mac1_mode, MAC_CFG_1);	/* and set the new mode */

		hp100_page(MAC_ADDRESS);
		for (i = 0; i < 8; i++)
			hp100_outb(lp->hash_bytes[i], HASH_BYTE0 + i);
#ifdef HP100_DEBUG
		printk("hp100: %s: mac1 = 0x%x, mac2 = 0x%x, multicast hash = %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
				     dev->name, lp->mac1_mode, lp->mac2_mode,
				     lp->hash_bytes[0], lp->hash_bytes[1],
				     lp->hash_bytes[2], lp->hash_bytes[3],
				     lp->hash_bytes[4], lp->hash_bytes[5],
				     lp->hash_bytes[6], lp->hash_bytes[7]);
#endif

		if (lp->lan_type == HP100_LAN_100) {
#ifdef HP100_DEBUG
			printk("hp100: %s: 100VG MAC settings have changed - relogin.\n", dev->name);
#endif
			lp->hub_status = hp100_login_to_vg_hub(dev, 1);	/* force a relogin to the hub */
		}
	} else {
		int i;
		u_char old_hash_bytes[8];

		hp100_page(MAC_ADDRESS);
		for (i = 0; i < 8; i++)
			old_hash_bytes[i] = hp100_inb(HASH_BYTE0 + i);
		if (memcmp(old_hash_bytes, &lp->hash_bytes, 8)) {
			for (i = 0; i < 8; i++)
				hp100_outb(lp->hash_bytes[i], HASH_BYTE0 + i);
#ifdef HP100_DEBUG
			printk("hp100: %s: multicast hash = %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
					dev->name, lp->hash_bytes[0],
					lp->hash_bytes[1], lp->hash_bytes[2],
					lp->hash_bytes[3], lp->hash_bytes[4],
					lp->hash_bytes[5], lp->hash_bytes[6],
					lp->hash_bytes[7]);
#endif

			if (lp->lan_type == HP100_LAN_100) {
#ifdef HP100_DEBUG
				printk("hp100: %s: 100VG MAC settings have changed - relogin.\n", dev->name);
#endif
				lp->hub_status = hp100_login_to_vg_hub(dev, 1);	/* force a relogin to the hub */
			}
		}
	}

	hp100_page(MAC_CTRL);
	hp100_orb(HP100_RX_EN | HP100_RX_IDLE |	/* enable rx */
		  HP100_TX_EN | HP100_TX_IDLE, MAC_CFG_1);	/* enable tx */

	hp100_page(PERFORMANCE);
	hp100_ints_on();
	spin_unlock_irqrestore(&lp->lock, flags);
}

/*
 *  hardware interrupt handling
 */

static irqreturn_t hp100_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	struct net_device *dev = (struct net_device *) dev_id;
	struct hp100_private *lp = netdev_priv(dev);

	int ioaddr;
	u_int val;

	if (dev == NULL)
		return IRQ_NONE;
	ioaddr = dev->base_addr;

	spin_lock(&lp->lock);

	hp100_ints_off();

#ifdef HP100_DEBUG_B
	hp100_outw(0x4219, TRACE);
#endif

	/*  hp100_page( PERFORMANCE ); */
	val = hp100_inw(IRQ_STATUS);
#ifdef HP100_DEBUG_IRQ
	printk("hp100: %s: mode=%x,IRQ_STAT=0x%.4x,RXPKTCNT=0x%.2x RXPDL=0x%.2x TXPKTCNT=0x%.2x TXPDL=0x%.2x\n",
			     dev->name, lp->mode, (u_int) val, hp100_inb(RX_PKT_CNT),
			     hp100_inb(RX_PDL), hp100_inb(TX_PKT_CNT), hp100_inb(TX_PDL));
#endif

	if (val == 0) {		/* might be a shared interrupt */
		spin_unlock(&lp->lock);
		hp100_ints_on();
		return IRQ_NONE;
	}
	/* We're only interested in those interrupts we really enabled. */
	/* val &= hp100_inw( IRQ_MASK ); */

	/* 
	 * RX_PDL_FILL_COMPL is set whenever a RX_PDL has been executed. A RX_PDL 
	 * is considered executed whenever the RX_PDL data structure is no longer 
	 * needed.
	 */
	if (val & HP100_RX_PDL_FILL_COMPL) {
		if (lp->mode == 1)
			hp100_rx_bm(dev);
		else {
			printk("hp100: %s: rx_pdl_fill_compl interrupt although not busmaster?\n", dev->name);
		}
	}

	/* 
	 * The RX_PACKET interrupt is set, when the receive packet counter is
	 * non zero. We use this interrupt for receiving in slave mode. In
	 * busmaster mode, we use it to make sure we did not miss any rx_pdl_fill
	 * interrupts. If rx_pdl_fill_compl is not set and rx_packet is set, then
	 * we somehow have missed a rx_pdl_fill_compl interrupt.
	 */

	if (val & HP100_RX_PACKET) {	/* Receive Packet Counter is non zero */
		if (lp->mode != 1)	/* non busmaster */
			hp100_rx(dev);
		else if (!(val & HP100_RX_PDL_FILL_COMPL)) {
			/* Shouldnt happen - maybe we missed a RX_PDL_FILL Interrupt?  */
			hp100_rx_bm(dev);
		}
	}

	/*
	 * Ack. that we have noticed the interrupt and thereby allow next one.
	 * Note that this is now done after the slave rx function, since first
	 * acknowledging and then setting ADV_NXT_PKT caused an extra interrupt
	 * on the J2573.
	 */
	hp100_outw(val, IRQ_STATUS);

	/*
	 * RX_ERROR is set when a packet is dropped due to no memory resources on 
	 * the card or when a RCV_ERR occurs. 
	 * TX_ERROR is set when a TX_ABORT condition occurs in the MAC->exists  
	 * only in the 802.3 MAC and happens when 16 collisions occur during a TX 
	 */
	if (val & (HP100_TX_ERROR | HP100_RX_ERROR)) {
#ifdef HP100_DEBUG_IRQ
		printk("hp100: %s: TX/RX Error IRQ\n", dev->name);
#endif
		hp100_update_stats(dev);
		if (lp->mode == 1) {
			hp100_rxfill(dev);
			hp100_clean_txring(dev);
		}
	}

	/* 
	 * RX_PDA_ZERO is set when the PDA count goes from non-zero to zero. 
	 */
	if ((lp->mode == 1) && (val & (HP100_RX_PDA_ZERO)))
		hp100_rxfill(dev);

	/* 
	 * HP100_TX_COMPLETE interrupt occurs when packet transmitted on wire 
	 * is completed 
	 */
	if ((lp->mode == 1) && (val & (HP100_TX_COMPLETE)))
		hp100_clean_txring(dev);

	/* 
	 * MISC_ERROR is set when either the LAN link goes down or a detected
	 * bus error occurs.
	 */
	if (val & HP100_MISC_ERROR) {	/* New for J2585B */
#ifdef HP100_DEBUG_IRQ
		printk
		    ("hp100: %s: Misc. Error Interrupt - Check cabling.\n",
		     dev->name);
#endif
		if (lp->mode == 1) {
			hp100_clean_txring(dev);
			hp100_rxfill(dev);
		}
		hp100_misc_interrupt(dev);
	}

	spin_unlock(&lp->lock);
	hp100_ints_on();
	return IRQ_HANDLED;
}

/*
 *  some misc functions
 */

static void hp100_start_interface(struct net_device *dev)
{
	unsigned long flags;
	int ioaddr = dev->base_addr;
	struct hp100_private *lp = netdev_priv(dev);

#ifdef HP100_DEBUG_B
	hp100_outw(0x4220, TRACE);
	printk("hp100: %s: hp100_start_interface\n", dev->name);
#endif

	spin_lock_irqsave(&lp->lock, flags);

	/* Ensure the adapter does not want to request an interrupt when */
	/* enabling the IRQ line to be active on the bus (i.e. not tri-stated) */
	hp100_page(PERFORMANCE);
	hp100_outw(0xfefe, IRQ_MASK);	/* mask off all ints */
	hp100_outw(0xffff, IRQ_STATUS);	/* ack all IRQs */
	hp100_outw(HP100_FAKE_INT | HP100_INT_EN | HP100_RESET_LB,
		   OPTION_LSW);
	/* Un Tri-state int. TODO: Check if shared interrupts can be realised? */
	hp100_outw(HP100_TRI_INT | HP100_RESET_HB, OPTION_LSW);

	if (lp->mode == 1) {
		/* Make sure BM bit is set... */
		hp100_page(HW_MAP);
		hp100_orb(HP100_BM_MASTER, BM);
		hp100_rxfill(dev);
	} else if (lp->mode == 2) {
		/* Enable memory mapping. Note: Don't do this when busmaster. */
		hp100_outw(HP100_MMAP_DIS | HP100_RESET_HB, OPTION_LSW);
	}

	hp100_page(PERFORMANCE);
	hp100_outw(0xfefe, IRQ_MASK);	/* mask off all ints */
	hp100_outw(0xffff, IRQ_STATUS);	/* ack IRQ */

	/* enable a few interrupts: */
	if (lp->mode == 1) {	/* busmaster mode */
		hp100_outw(HP100_RX_PDL_FILL_COMPL |
			   HP100_RX_PDA_ZERO | HP100_RX_ERROR |
			   /* HP100_RX_PACKET    | */
			   /* HP100_RX_EARLY_INT |  */ HP100_SET_HB |
			   /* HP100_TX_PDA_ZERO  |  */
			   HP100_TX_COMPLETE |
			   /* HP100_MISC_ERROR   |  */
			   HP100_TX_ERROR | HP100_SET_LB, IRQ_MASK);
	} else {
		hp100_outw(HP100_RX_PACKET |
			   HP100_RX_ERROR | HP100_SET_HB |
			   HP100_TX_ERROR | HP100_SET_LB, IRQ_MASK);
	}

	/* Note : before hp100_set_multicast_list(), because it will play with
	 * spinlock itself... Jean II */
	spin_unlock_irqrestore(&lp->lock, flags);

	/* Enable MAC Tx and RX, set MAC modes, ... */
	hp100_set_multicast_list(dev);
}

static void hp100_stop_interface(struct net_device *dev)
{
	struct hp100_private *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;
	u_int val;

#ifdef HP100_DEBUG_B
	printk("hp100: %s: hp100_stop_interface\n", dev->name);
	hp100_outw(0x4221, TRACE);
#endif

	if (lp->mode == 1)
		hp100_BM_shutdown(dev);
	else {
		/* Note: MMAP_DIS will be reenabled by start_interface */
		hp100_outw(HP100_INT_EN | HP100_RESET_LB |
			   HP100_TRI_INT | HP100_MMAP_DIS | HP100_SET_HB,
			   OPTION_LSW);
		val = hp100_inw(OPTION_LSW);

		hp100_page(MAC_CTRL);
		hp100_andb(~(HP100_RX_EN | HP100_TX_EN), MAC_CFG_1);

		if (!(val & HP100_HW_RST))
			return;	/* If reset, imm. return ... */
		/* ... else: busy wait until idle */
		for (val = 0; val < 6000; val++)
			if ((hp100_inb(MAC_CFG_1) & (HP100_TX_IDLE | HP100_RX_IDLE)) == (HP100_TX_IDLE | HP100_RX_IDLE)) {
				hp100_page(PERFORMANCE);
				return;
			}
		printk("hp100: %s: hp100_stop_interface - timeout\n", dev->name);
		hp100_page(PERFORMANCE);
	}
}

static void hp100_load_eeprom(struct net_device *dev, u_short probe_ioaddr)
{
	int i;
	int ioaddr = probe_ioaddr > 0 ? probe_ioaddr : dev->base_addr;

#ifdef HP100_DEBUG_B
	hp100_outw(0x4222, TRACE);
#endif

	hp100_page(EEPROM_CTRL);
	hp100_andw(~HP100_EEPROM_LOAD, EEPROM_CTRL);
	hp100_orw(HP100_EEPROM_LOAD, EEPROM_CTRL);
	for (i = 0; i < 10000; i++)
		if (!(hp100_inb(OPTION_MSW) & HP100_EE_LOAD))
			return;
	printk("hp100: %s: hp100_load_eeprom - timeout\n", dev->name);
}

/*  Sense connection status.
 *  return values: LAN_10  - Connected to 10Mbit/s network
 *                 LAN_100 - Connected to 100Mbit/s network
 *                 LAN_ERR - not connected or 100Mbit/s Hub down
 */
static int hp100_sense_lan(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	u_short val_VG, val_10;
	struct hp100_private *lp = netdev_priv(dev);

#ifdef HP100_DEBUG_B
	hp100_outw(0x4223, TRACE);
#endif

	hp100_page(MAC_CTRL);
	val_10 = hp100_inb(10_LAN_CFG_1);
	val_VG = hp100_inb(VG_LAN_CFG_1);
	hp100_page(PERFORMANCE);
#ifdef HP100_DEBUG
	printk("hp100: %s: sense_lan: val_VG = 0x%04x, val_10 = 0x%04x\n",
	       dev->name, val_VG, val_10);
#endif

	if (val_10 & HP100_LINK_BEAT_ST)	/* 10Mb connection is active */
		return HP100_LAN_10;

	if (val_10 & HP100_AUI_ST) {	/* have we BNC or AUI onboard? */
		/*
		 * This can be overriden by dos utility, so if this has no effect,
		 * perhaps you need to download that utility from HP and set card
		 * back to "auto detect".
		 */
		val_10 |= HP100_AUI_SEL | HP100_LOW_TH;
		hp100_page(MAC_CTRL);
		hp100_outb(val_10, 10_LAN_CFG_1);
		hp100_page(PERFORMANCE);
		return HP100_LAN_COAX;
	}

	/* Those cards don't have a 100 Mbit connector */
	if ( !strcmp(lp->id, "HWP1920")  ||
	     (lp->pci_dev && 
	      lp->pci_dev->vendor == PCI_VENDOR_ID && 
	      (lp->pci_dev->device == PCI_DEVICE_ID_HP_J2970A ||
	       lp->pci_dev->device == PCI_DEVICE_ID_HP_J2973A)))
		return HP100_LAN_ERR;
	
	if (val_VG & HP100_LINK_CABLE_ST)	/* Can hear the HUBs tone. */
		return HP100_LAN_100;
	return HP100_LAN_ERR;
}

static int hp100_down_vg_link(struct net_device *dev)
{
	struct hp100_private *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;
	unsigned long time;
	long savelan, newlan;

#ifdef HP100_DEBUG_B
	hp100_outw(0x4224, TRACE);
	printk("hp100: %s: down_vg_link\n", dev->name);
#endif

	hp100_page(MAC_CTRL);
	time = jiffies + (HZ / 4);
	do {
		if (hp100_inb(VG_LAN_CFG_1) & HP100_LINK_CABLE_ST)
			break;
		if (!in_interrupt())
			schedule_timeout_interruptible(1);
	} while (time_after(time, jiffies));

	if (time_after_eq(jiffies, time))	/* no signal->no logout */
		return 0;

	/* Drop the VG Link by clearing the link up cmd and load addr. */

	hp100_andb(~(HP100_LOAD_ADDR | HP100_LINK_CMD), VG_LAN_CFG_1);
	hp100_orb(HP100_VG_SEL, VG_LAN_CFG_1);

	/* Conditionally stall for >250ms on Link-Up Status (to go down) */
	time = jiffies + (HZ / 2);
	do {
		if (!(hp100_inb(VG_LAN_CFG_1) & HP100_LINK_UP_ST))
			break;
		if (!in_interrupt())
			schedule_timeout_interruptible(1);
	} while (time_after(time, jiffies));

#ifdef HP100_DEBUG
	if (time_after_eq(jiffies, time))
		printk("hp100: %s: down_vg_link: Link does not go down?\n", dev->name);
#endif

	/* To prevent condition where Rev 1 VG MAC and old hubs do not complete */
	/* logout under traffic (even though all the status bits are cleared),  */
	/* do this workaround to get the Rev 1 MAC in its idle state */
	if (lp->chip == HP100_CHIPID_LASSEN) {
		/* Reset VG MAC to insure it leaves the logoff state even if */
		/* the Hub is still emitting tones */
		hp100_andb(~HP100_VG_RESET, VG_LAN_CFG_1);
		udelay(1500);	/* wait for >1ms */
		hp100_orb(HP100_VG_RESET, VG_LAN_CFG_1);	/* Release Reset */
		udelay(1500);
	}

	/* New: For lassen, switch to 10 Mbps mac briefly to clear training ACK */
	/* to get the VG mac to full reset. This is not req.d with later chips */
	/* Note: It will take the between 1 and 2 seconds for the VG mac to be */
	/* selected again! This will be left to the connect hub function to */
	/* perform if desired.  */
	if (lp->chip == HP100_CHIPID_LASSEN) {
		/* Have to write to 10 and 100VG control registers simultaneously */
		savelan = newlan = hp100_inl(10_LAN_CFG_1);	/* read 10+100 LAN_CFG regs */
		newlan &= ~(HP100_VG_SEL << 16);
		newlan |= (HP100_DOT3_MAC) << 8;
		hp100_andb(~HP100_AUTO_MODE, MAC_CFG_3);	/* Autosel off */
		hp100_outl(newlan, 10_LAN_CFG_1);

		/* Conditionally stall for 5sec on VG selected. */
		time = jiffies + (HZ * 5);
		do {
			if (!(hp100_inb(MAC_CFG_4) & HP100_MAC_SEL_ST))
				break;
			if (!in_interrupt())
				schedule_timeout_interruptible(1);
		} while (time_after(time, jiffies));

		hp100_orb(HP100_AUTO_MODE, MAC_CFG_3);	/* Autosel back on */
		hp100_outl(savelan, 10_LAN_CFG_1);
	}

	time = jiffies + (3 * HZ);	/* Timeout 3s */
	do {
		if ((hp100_inb(VG_LAN_CFG_1) & HP100_LINK_CABLE_ST) == 0)
			break;
		if (!in_interrupt())
			schedule_timeout_interruptible(1);
	} while (time_after(time, jiffies));

	if (time_before_eq(time, jiffies)) {
#ifdef HP100_DEBUG
		printk("hp100: %s: down_vg_link: timeout\n", dev->name);
#endif
		return -EIO;
	}

	time = jiffies + (2 * HZ);	/* This seems to take a while.... */
	do {
		if (!in_interrupt())
			schedule_timeout_interruptible(1);
	} while (time_after(time, jiffies));

	return 0;
}

static int hp100_login_to_vg_hub(struct net_device *dev, u_short force_relogin)
{
	int ioaddr = dev->base_addr;
	struct hp100_private *lp = netdev_priv(dev);
	u_short val = 0;
	unsigned long time;
	int startst;

#ifdef HP100_DEBUG_B
	hp100_outw(0x4225, TRACE);
	printk("hp100: %s: login_to_vg_hub\n", dev->name);
#endif

	/* Initiate a login sequence iff VG MAC is enabled and either Load Address
	 * bit is zero or the force relogin flag is set (e.g. due to MAC address or
	 * promiscuous mode change)
	 */
	hp100_page(MAC_CTRL);
	startst = hp100_inb(VG_LAN_CFG_1);
	if ((force_relogin == 1) || (hp100_inb(MAC_CFG_4) & HP100_MAC_SEL_ST)) {
#ifdef HP100_DEBUG_TRAINING
		printk("hp100: %s: Start training\n", dev->name);
#endif

		/* Ensure VG Reset bit is 1 (i.e., do not reset) */
		hp100_orb(HP100_VG_RESET, VG_LAN_CFG_1);

		/* If Lassen AND auto-select-mode AND VG tones were sensed on */
		/* entry then temporarily put them into force 100Mbit mode */
		if ((lp->chip == HP100_CHIPID_LASSEN) && (startst & HP100_LINK_CABLE_ST))
			hp100_andb(~HP100_DOT3_MAC, 10_LAN_CFG_2);

		/* Drop the VG link by zeroing Link Up Command and Load Address  */
		hp100_andb(~(HP100_LINK_CMD /* |HP100_LOAD_ADDR */ ), VG_LAN_CFG_1);

#ifdef HP100_DEBUG_TRAINING
		printk("hp100: %s: Bring down the link\n", dev->name);
#endif

		/* Wait for link to drop */
		time = jiffies + (HZ / 10);
		do {
			if (~(hp100_inb(VG_LAN_CFG_1) & HP100_LINK_UP_ST))
				break;
			if (!in_interrupt())
				schedule_timeout_interruptible(1);
		} while (time_after(time, jiffies));

		/* Start an addressed training and optionally request promiscuous port */
		if ((dev->flags) & IFF_PROMISC) {
			hp100_orb(HP100_PROM_MODE, VG_LAN_CFG_2);
			if (lp->chip == HP100_CHIPID_LASSEN)
				hp100_orw(HP100_MACRQ_PROMSC, TRAIN_REQUEST);
		} else {
			hp100_andb(~HP100_PROM_MODE, VG_LAN_CFG_2);
			/* For ETR parts we need to reset the prom. bit in the training
			 * register, otherwise promiscious mode won't be disabled.
			 */
			if (lp->chip == HP100_CHIPID_LASSEN) {
				hp100_andw(~HP100_MACRQ_PROMSC, TRAIN_REQUEST);
			}
		}

		/* With ETR parts, frame format request bits can be set. */
		if (lp->chip == HP100_CHIPID_LASSEN)
			hp100_orb(HP100_MACRQ_FRAMEFMT_EITHER, TRAIN_REQUEST);

		hp100_orb(HP100_LINK_CMD | HP100_LOAD_ADDR | HP100_VG_RESET, VG_LAN_CFG_1);

		/* Note: Next wait could be omitted for Hood and earlier chips under */
		/* certain circumstances */
		/* TODO: check if hood/earlier and skip wait. */

		/* Wait for either short timeout for VG tones or long for login    */
		/* Wait for the card hardware to signalise link cable status ok... */
		hp100_page(MAC_CTRL);
		time = jiffies + (1 * HZ);	/* 1 sec timeout for cable st */
		do {
			if (hp100_inb(VG_LAN_CFG_1) & HP100_LINK_CABLE_ST)
				break;
			if (!in_interrupt())
				schedule_timeout_interruptible(1);
		} while (time_before(jiffies, time));

		if (time_after_eq(jiffies, time)) {
#ifdef HP100_DEBUG_TRAINING
			printk("hp100: %s: Link cable status not ok? Training aborted.\n", dev->name);
#endif
		} else {
#ifdef HP100_DEBUG_TRAINING
			printk
			    ("hp100: %s: HUB tones detected. Trying to train.\n",
			     dev->name);
#endif

			time = jiffies + (2 * HZ);	/* again a timeout */
			do {
				val = hp100_inb(VG_LAN_CFG_1);
				if ((val & (HP100_LINK_UP_ST))) {
#ifdef HP100_DEBUG_TRAINING
					printk("hp100: %s: Passed training.\n", dev->name);
#endif
					break;
				}
				if (!in_interrupt())
					schedule_timeout_interruptible(1);
			} while (time_after(time, jiffies));
		}

		/* If LINK_UP_ST is set, then we are logged into the hub. */
		if (time_before_eq(jiffies, time) && (val & HP100_LINK_UP_ST)) {
#ifdef HP100_DEBUG_TRAINING
			printk("hp100: %s: Successfully logged into the HUB.\n", dev->name);
			if (lp->chip == HP100_CHIPID_LASSEN) {
				val = hp100_inw(TRAIN_ALLOW);
				printk("hp100: %s: Card supports 100VG MAC Version \"%s\" ",
					     dev->name, (hp100_inw(TRAIN_REQUEST) & HP100_CARD_MACVER) ? "802.12" : "Pre");
				printk("Driver will use MAC Version \"%s\"\n", (val & HP100_HUB_MACVER) ? "802.12" : "Pre");
				printk("hp100: %s: Frame format is %s.\n", dev->name, (val & HP100_MALLOW_FRAMEFMT) ? "802.5" : "802.3");
			}
#endif
		} else {
			/* If LINK_UP_ST is not set, login was not successful */
			printk("hp100: %s: Problem logging into the HUB.\n", dev->name);
			if (lp->chip == HP100_CHIPID_LASSEN) {
				/* Check allowed Register to find out why there is a problem. */
				val = hp100_inw(TRAIN_ALLOW);	/* won't work on non-ETR card */
#ifdef HP100_DEBUG_TRAINING
				printk("hp100: %s: MAC Configuration requested: 0x%04x, HUB allowed: 0x%04x\n", dev->name, hp100_inw(TRAIN_REQUEST), val);
#endif
				if (val & HP100_MALLOW_ACCDENIED)
					printk("hp100: %s: HUB access denied.\n", dev->name);
				if (val & HP100_MALLOW_CONFIGURE)
					printk("hp100: %s: MAC Configuration is incompatible with the Network.\n", dev->name);
				if (val & HP100_MALLOW_DUPADDR)
					printk("hp100: %s: Duplicate MAC Address on the Network.\n", dev->name);
			}
		}

		/* If we have put the chip into forced 100 Mbit mode earlier, go back */
		/* to auto-select mode */

		if ((lp->chip == HP100_CHIPID_LASSEN) && (startst & HP100_LINK_CABLE_ST)) {
			hp100_page(MAC_CTRL);
			hp100_orb(HP100_DOT3_MAC, 10_LAN_CFG_2);
		}

		val = hp100_inb(VG_LAN_CFG_1);

		/* Clear the MISC_ERROR Interrupt, which might be generated when doing the relogin */
		hp100_page(PERFORMANCE);
		hp100_outw(HP100_MISC_ERROR, IRQ_STATUS);

		if (val & HP100_LINK_UP_ST)
			return (0);	/* login was ok */
		else {
			printk("hp100: %s: Training failed.\n", dev->name);
			hp100_down_vg_link(dev);
			return -EIO;
		}
	}
	/* no forced relogin & already link there->no training. */
	return -EIO;
}

static void hp100_cascade_reset(struct net_device *dev, u_short enable)
{
	int ioaddr = dev->base_addr;
	struct hp100_private *lp = netdev_priv(dev);

#ifdef HP100_DEBUG_B
	hp100_outw(0x4226, TRACE);
	printk("hp100: %s: cascade_reset\n", dev->name);
#endif

	if (enable) {
		hp100_outw(HP100_HW_RST | HP100_RESET_LB, OPTION_LSW);
		if (lp->chip == HP100_CHIPID_LASSEN) {
			/* Lassen requires a PCI transmit fifo reset */
			hp100_page(HW_MAP);
			hp100_andb(~HP100_PCI_RESET, PCICTRL2);
			hp100_orb(HP100_PCI_RESET, PCICTRL2);
			/* Wait for min. 300 ns */
			/* we can't use jiffies here, because it may be */
			/* that we have disabled the timer... */
			udelay(400);
			hp100_andb(~HP100_PCI_RESET, PCICTRL2);
			hp100_page(PERFORMANCE);
		}
	} else {		/* bring out of reset */
		hp100_outw(HP100_HW_RST | HP100_SET_LB, OPTION_LSW);
		udelay(400);
		hp100_page(PERFORMANCE);
	}
}

#ifdef HP100_DEBUG
void hp100_RegisterDump(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	int Page;
	int Register;

	/* Dump common registers */
	printk("hp100: %s: Cascade Register Dump\n", dev->name);
	printk("hardware id #1: 0x%.2x\n", hp100_inb(HW_ID));
	printk("hardware id #2/paging: 0x%.2x\n", hp100_inb(PAGING));
	printk("option #1: 0x%.4x\n", hp100_inw(OPTION_LSW));
	printk("option #2: 0x%.4x\n", hp100_inw(OPTION_MSW));

	/* Dump paged registers */
	for (Page = 0; Page < 8; Page++) {
		/* Dump registers */
		printk("page: 0x%.2x\n", Page);
		outw(Page, ioaddr + 0x02);
		for (Register = 0x8; Register < 0x22; Register += 2) {
			/* Display Register contents except data port */
			if (((Register != 0x10) && (Register != 0x12)) || (Page > 0)) {
				printk("0x%.2x = 0x%.4x\n", Register, inw(ioaddr + Register));
			}
		}
	}
	hp100_page(PERFORMANCE);
}
#endif


static void cleanup_dev(struct net_device *d)
{
	struct hp100_private *p = netdev_priv(d);

	unregister_netdev(d);
	release_region(d->base_addr, HP100_REGION_SIZE);

	if (p->mode == 1)	/* busmaster */
		pci_free_consistent(p->pci_dev, MAX_RINGSIZE + 0x0f, 
				    p->page_vaddr_algn, 
				    virt_to_whatever(d, p->page_vaddr_algn));
	if (p->mem_ptr_virt)
		iounmap(p->mem_ptr_virt);

	free_netdev(d);
}

#ifdef CONFIG_EISA
static int __init hp100_eisa_probe (struct device *gendev)
{
	struct net_device *dev = alloc_etherdev(sizeof(struct hp100_private));
	struct eisa_device *edev = to_eisa_device(gendev);
	int err;

	if (!dev)
		return -ENOMEM;

	SET_MODULE_OWNER(dev);
	SET_NETDEV_DEV(dev, &edev->dev);

	err = hp100_probe1(dev, edev->base_addr + 0xC38, HP100_BUS_EISA, NULL);
	if (err)
		goto out1;

#ifdef HP100_DEBUG
	printk("hp100: %s: EISA adapter found at 0x%x\n", dev->name, 
	       dev->base_addr);
#endif
	gendev->driver_data = dev;
	return 0;
 out1:
	free_netdev(dev);
	return err;
}

static int __devexit hp100_eisa_remove (struct device *gendev)
{
	struct net_device *dev = gendev->driver_data;
	cleanup_dev(dev);
	return 0;
}

static struct eisa_driver hp100_eisa_driver = {
        .id_table = hp100_eisa_tbl,
        .driver   = {
                .name    = "hp100",
                .probe   = hp100_eisa_probe,
                .remove  = __devexit_p (hp100_eisa_remove),
        }
};
#endif

#ifdef CONFIG_PCI
static int __devinit hp100_pci_probe (struct pci_dev *pdev,
				     const struct pci_device_id *ent)
{
	struct net_device *dev;
	int ioaddr;
	u_short pci_command;
	int err;

	if (pci_enable_device(pdev))
		return -ENODEV;

	dev = alloc_etherdev(sizeof(struct hp100_private));
	if (!dev) {
		err = -ENOMEM;
		goto out0;
	}

	SET_MODULE_OWNER(dev);
	SET_NETDEV_DEV(dev, &pdev->dev);

	pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
	if (!(pci_command & PCI_COMMAND_IO)) {
#ifdef HP100_DEBUG
		printk("hp100: %s: PCI I/O Bit has not been set. Setting...\n", dev->name);
#endif
		pci_command |= PCI_COMMAND_IO;
		pci_write_config_word(pdev, PCI_COMMAND, pci_command);
	}

	if (!(pci_command & PCI_COMMAND_MASTER)) {
#ifdef HP100_DEBUG
		printk("hp100: %s: PCI Master Bit has not been set. Setting...\n", dev->name);
#endif
		pci_command |= PCI_COMMAND_MASTER;
		pci_write_config_word(pdev, PCI_COMMAND, pci_command);
	}
	
	ioaddr = pci_resource_start(pdev, 0);
	err = hp100_probe1(dev, ioaddr, HP100_BUS_PCI, pdev);
	if (err) 
		goto out1;
	
#ifdef HP100_DEBUG
	printk("hp100: %s: PCI adapter found at 0x%x\n", dev->name, ioaddr);
#endif
	pci_set_drvdata(pdev, dev);
	return 0;
 out1:
	free_netdev(dev);
 out0:
	pci_disable_device(pdev);
	return err;
}

static void __devexit hp100_pci_remove (struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);

	cleanup_dev(dev);
	pci_disable_device(pdev);
}


static struct pci_driver hp100_pci_driver = {
	.name		= "hp100",
	.id_table	= hp100_pci_tbl,
	.probe		= hp100_pci_probe,
	.remove		= __devexit_p(hp100_pci_remove),
};
#endif

/*
 *  module section
 */

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, "
              "Siegfried \"Frieder\" Loeffler (dg1sek) <floeff@mathematik.uni-stuttgart.de>");
MODULE_DESCRIPTION("HP CASCADE Architecture Driver for 100VG-AnyLan Network Adapters");

/*
 * Note: to register three isa devices, use:
 * option hp100 hp100_port=0,0,0
 *        to register one card at io 0x280 as eth239, use:
 * option hp100 hp100_port=0x280
 */
#if defined(MODULE) && defined(CONFIG_ISA)
#define HP100_DEVICES 5
/* Parameters set by insmod */
static int hp100_port[HP100_DEVICES] = { 0, [1 ... (HP100_DEVICES-1)] = -1 };
module_param_array(hp100_port, int, NULL, 0);

/* List of devices */
static struct net_device *hp100_devlist[HP100_DEVICES];

static int __init hp100_isa_init(void)
{
	struct net_device *dev;
	int i, err, cards = 0;

	/* Don't autoprobe ISA bus */
	if (hp100_port[0] == 0)
		return -ENODEV;

	/* Loop on all possible base addresses */
	for (i = 0; i < HP100_DEVICES && hp100_port[i] != -1; ++i) {
		dev = alloc_etherdev(sizeof(struct hp100_private));
		if (!dev) {
			printk(KERN_WARNING "hp100: no memory for network device\n");
			while (cards > 0)
				cleanup_dev(hp100_devlist[--cards]);

			return -ENOMEM;
		}
		SET_MODULE_OWNER(dev);

		err = hp100_isa_probe(dev, hp100_port[i]);
		if (!err)
			hp100_devlist[cards++] = dev;
		else
			free_netdev(dev);
	}

	return cards > 0 ? 0 : -ENODEV;
}

static void __exit hp100_isa_cleanup(void) 
{
	int i;

	for (i = 0; i < HP100_DEVICES; i++) {
		struct net_device *dev = hp100_devlist[i];
		if (dev)
			cleanup_dev(dev);
	}
}
#else
#define hp100_isa_init()	(0)
#define hp100_isa_cleanup()	do { } while(0)
#endif

static int __init hp100_module_init(void)
{
	int err;

	err = hp100_isa_init();
	if (err && err != -ENODEV)
		goto out;
#ifdef CONFIG_EISA
	err = eisa_driver_register(&hp100_eisa_driver);
	if (err && err != -ENODEV) 
		goto out2;
#endif
#ifdef CONFIG_PCI
	err = pci_module_init(&hp100_pci_driver);
	if (err && err != -ENODEV) 
		goto out3;
#endif
 out:
	return err;
 out3:
#ifdef CONFIG_EISA
	eisa_driver_unregister (&hp100_eisa_driver);
 out2:
#endif
	hp100_isa_cleanup();
	goto out;
}


static void __exit hp100_module_exit(void)
{
	hp100_isa_cleanup();
#ifdef CONFIG_EISA
	eisa_driver_unregister (&hp100_eisa_driver);
#endif
#ifdef CONFIG_PCI
	pci_unregister_driver (&hp100_pci_driver);
#endif
}

module_init(hp100_module_init)
module_exit(hp100_module_exit)


/*
 * Local variables:
 *  compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c hp100.c"
 *  c-indent-level: 2
 *  tab-width: 8
 * End:
 */