aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/tc35815.c
blob: 1ce2da172ca942a8f8d58c274d838d613b2125e2 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
/*
 * tc35815.c: A TOSHIBA TC35815CF PCI 10/100Mbps ethernet driver for linux.
 *
 * Based on skelton.c by Donald Becker.
 *
 * This driver is a replacement of older and less maintained version.
 * This is a header of the older version:
 *	-----<snip>-----
 *	Copyright 2001 MontaVista Software Inc.
 *	Author: MontaVista Software, Inc.
 *		ahennessy@mvista.com
 *	Copyright (C) 2000-2001 Toshiba Corporation
 *	static const char *version =
 *		"tc35815.c:v0.00 26/07/2000 by Toshiba Corporation\n";
 *	-----<snip>-----
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * (C) Copyright TOSHIBA CORPORATION 2004-2005
 * All Rights Reserved.
 */

#ifdef TC35815_NAPI
#define DRV_VERSION	"1.37-NAPI"
#else
#define DRV_VERSION	"1.37"
#endif
static const char *version = "tc35815.c:v" DRV_VERSION "\n";
#define MODNAME			"tc35815"

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/if_vlan.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/phy.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/byteorder.h>

/* First, a few definitions that the brave might change. */

#define GATHER_TXINT	/* On-Demand Tx Interrupt */
#define WORKAROUND_LOSTCAR
#define WORKAROUND_100HALF_PROMISC
/* #define TC35815_USE_PACKEDBUFFER */

enum tc35815_chiptype {
	TC35815CF = 0,
	TC35815_NWU,
	TC35815_TX4939,
};

/* indexed by tc35815_chiptype, above */
static const struct {
	const char *name;
} chip_info[] __devinitdata = {
	{ "TOSHIBA TC35815CF 10/100BaseTX" },
	{ "TOSHIBA TC35815 with Wake on LAN" },
	{ "TOSHIBA TC35815/TX4939" },
};

static const struct pci_device_id tc35815_pci_tbl[] = {
	{PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815CF), .driver_data = TC35815CF },
	{PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_NWU), .driver_data = TC35815_NWU },
	{PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939), .driver_data = TC35815_TX4939 },
	{0,}
};
MODULE_DEVICE_TABLE(pci, tc35815_pci_tbl);

/* see MODULE_PARM_DESC */
static struct tc35815_options {
	int speed;
	int duplex;
} options;

/*
 * Registers
 */
struct tc35815_regs {
	__u32 DMA_Ctl;		/* 0x00 */
	__u32 TxFrmPtr;
	__u32 TxThrsh;
	__u32 TxPollCtr;
	__u32 BLFrmPtr;
	__u32 RxFragSize;
	__u32 Int_En;
	__u32 FDA_Bas;
	__u32 FDA_Lim;		/* 0x20 */
	__u32 Int_Src;
	__u32 unused0[2];
	__u32 PauseCnt;
	__u32 RemPauCnt;
	__u32 TxCtlFrmStat;
	__u32 unused1;
	__u32 MAC_Ctl;		/* 0x40 */
	__u32 CAM_Ctl;
	__u32 Tx_Ctl;
	__u32 Tx_Stat;
	__u32 Rx_Ctl;
	__u32 Rx_Stat;
	__u32 MD_Data;
	__u32 MD_CA;
	__u32 CAM_Adr;		/* 0x60 */
	__u32 CAM_Data;
	__u32 CAM_Ena;
	__u32 PROM_Ctl;
	__u32 PROM_Data;
	__u32 Algn_Cnt;
	__u32 CRC_Cnt;
	__u32 Miss_Cnt;
};

/*
 * Bit assignments
 */
/* DMA_Ctl bit asign ------------------------------------------------------- */
#define DMA_RxAlign	       0x00c00000 /* 1:Reception Alignment	     */
#define DMA_RxAlign_1	       0x00400000
#define DMA_RxAlign_2	       0x00800000
#define DMA_RxAlign_3	       0x00c00000
#define DMA_M66EnStat	       0x00080000 /* 1:66MHz Enable State	     */
#define DMA_IntMask	       0x00040000 /* 1:Interupt mask		     */
#define DMA_SWIntReq	       0x00020000 /* 1:Software Interrupt request    */
#define DMA_TxWakeUp	       0x00010000 /* 1:Transmit Wake Up		     */
#define DMA_RxBigE	       0x00008000 /* 1:Receive Big Endian	     */
#define DMA_TxBigE	       0x00004000 /* 1:Transmit Big Endian	     */
#define DMA_TestMode	       0x00002000 /* 1:Test Mode		     */
#define DMA_PowrMgmnt	       0x00001000 /* 1:Power Management		     */
#define DMA_DmBurst_Mask       0x000001fc /* DMA Burst size		     */

/* RxFragSize bit asign ---------------------------------------------------- */
#define RxFrag_EnPack	       0x00008000 /* 1:Enable Packing		     */
#define RxFrag_MinFragMask     0x00000ffc /* Minimum Fragment		     */

/* MAC_Ctl bit asign ------------------------------------------------------- */
#define MAC_Link10	       0x00008000 /* 1:Link Status 10Mbits	     */
#define MAC_EnMissRoll	       0x00002000 /* 1:Enable Missed Roll	     */
#define MAC_MissRoll	       0x00000400 /* 1:Missed Roll		     */
#define MAC_Loop10	       0x00000080 /* 1:Loop 10 Mbps		     */
#define MAC_Conn_Auto	       0x00000000 /*00:Connection mode (Automatic)   */
#define MAC_Conn_10M	       0x00000020 /*01:		       (10Mbps endec)*/
#define MAC_Conn_Mll	       0x00000040 /*10:		       (Mll clock)   */
#define MAC_MacLoop	       0x00000010 /* 1:MAC Loopback		     */
#define MAC_FullDup	       0x00000008 /* 1:Full Duplex 0:Half Duplex     */
#define MAC_Reset	       0x00000004 /* 1:Software Reset		     */
#define MAC_HaltImm	       0x00000002 /* 1:Halt Immediate		     */
#define MAC_HaltReq	       0x00000001 /* 1:Halt request		     */

/* PROM_Ctl bit asign ------------------------------------------------------ */
#define PROM_Busy	       0x00008000 /* 1:Busy (Start Operation)	     */
#define PROM_Read	       0x00004000 /*10:Read operation		     */
#define PROM_Write	       0x00002000 /*01:Write operation		     */
#define PROM_Erase	       0x00006000 /*11:Erase operation		     */
					  /*00:Enable or Disable Writting,   */
					  /*	  as specified in PROM_Addr. */
#define PROM_Addr_Ena	       0x00000030 /*11xxxx:PROM Write enable	     */
					  /*00xxxx:	      disable	     */

/* CAM_Ctl bit asign ------------------------------------------------------- */
#define CAM_CompEn	       0x00000010 /* 1:CAM Compare Enable	     */
#define CAM_NegCAM	       0x00000008 /* 1:Reject packets CAM recognizes,*/
					  /*			accept other */
#define CAM_BroadAcc	       0x00000004 /* 1:Broadcast assept		     */
#define CAM_GroupAcc	       0x00000002 /* 1:Multicast assept		     */
#define CAM_StationAcc	       0x00000001 /* 1:unicast accept		     */

/* CAM_Ena bit asign ------------------------------------------------------- */
#define CAM_ENTRY_MAX		       21   /* CAM Data entry max count	     */
#define CAM_Ena_Mask ((1<<CAM_ENTRY_MAX)-1) /* CAM Enable bits (Max 21bits)  */
#define CAM_Ena_Bit(index)	(1 << (index))
#define CAM_ENTRY_DESTINATION	0
#define CAM_ENTRY_SOURCE	1
#define CAM_ENTRY_MACCTL	20

/* Tx_Ctl bit asign -------------------------------------------------------- */
#define Tx_En		       0x00000001 /* 1:Transmit enable		     */
#define Tx_TxHalt	       0x00000002 /* 1:Transmit Halt Request	     */
#define Tx_NoPad	       0x00000004 /* 1:Suppress Padding		     */
#define Tx_NoCRC	       0x00000008 /* 1:Suppress Padding		     */
#define Tx_FBack	       0x00000010 /* 1:Fast Back-off		     */
#define Tx_EnUnder	       0x00000100 /* 1:Enable Underrun		     */
#define Tx_EnExDefer	       0x00000200 /* 1:Enable Excessive Deferral     */
#define Tx_EnLCarr	       0x00000400 /* 1:Enable Lost Carrier	     */
#define Tx_EnExColl	       0x00000800 /* 1:Enable Excessive Collision    */
#define Tx_EnLateColl	       0x00001000 /* 1:Enable Late Collision	     */
#define Tx_EnTxPar	       0x00002000 /* 1:Enable Transmit Parity	     */
#define Tx_EnComp	       0x00004000 /* 1:Enable Completion	     */

/* Tx_Stat bit asign ------------------------------------------------------- */
#define Tx_TxColl_MASK	       0x0000000F /* Tx Collision Count		     */
#define Tx_ExColl	       0x00000010 /* Excessive Collision	     */
#define Tx_TXDefer	       0x00000020 /* Transmit Defered		     */
#define Tx_Paused	       0x00000040 /* Transmit Paused		     */
#define Tx_IntTx	       0x00000080 /* Interrupt on Tx		     */
#define Tx_Under	       0x00000100 /* Underrun			     */
#define Tx_Defer	       0x00000200 /* Deferral			     */
#define Tx_NCarr	       0x00000400 /* No Carrier			     */
#define Tx_10Stat	       0x00000800 /* 10Mbps Status		     */
#define Tx_LateColl	       0x00001000 /* Late Collision		     */
#define Tx_TxPar	       0x00002000 /* Tx Parity Error		     */
#define Tx_Comp		       0x00004000 /* Completion			     */
#define Tx_Halted	       0x00008000 /* Tx Halted			     */
#define Tx_SQErr	       0x00010000 /* Signal Quality Error(SQE)	     */

/* Rx_Ctl bit asign -------------------------------------------------------- */
#define Rx_EnGood	       0x00004000 /* 1:Enable Good		     */
#define Rx_EnRxPar	       0x00002000 /* 1:Enable Receive Parity	     */
#define Rx_EnLongErr	       0x00000800 /* 1:Enable Long Error	     */
#define Rx_EnOver	       0x00000400 /* 1:Enable OverFlow		     */
#define Rx_EnCRCErr	       0x00000200 /* 1:Enable CRC Error		     */
#define Rx_EnAlign	       0x00000100 /* 1:Enable Alignment		     */
#define Rx_IgnoreCRC	       0x00000040 /* 1:Ignore CRC Value		     */
#define Rx_StripCRC	       0x00000010 /* 1:Strip CRC Value		     */
#define Rx_ShortEn	       0x00000008 /* 1:Short Enable		     */
#define Rx_LongEn	       0x00000004 /* 1:Long Enable		     */
#define Rx_RxHalt	       0x00000002 /* 1:Receive Halt Request	     */
#define Rx_RxEn		       0x00000001 /* 1:Receive Intrrupt Enable	     */

/* Rx_Stat bit asign ------------------------------------------------------- */
#define Rx_Halted	       0x00008000 /* Rx Halted			     */
#define Rx_Good		       0x00004000 /* Rx Good			     */
#define Rx_RxPar	       0x00002000 /* Rx Parity Error		     */
#define Rx_TypePkt	       0x00001000 /* Rx Type Packet		     */
#define Rx_LongErr	       0x00000800 /* Rx Long Error		     */
#define Rx_Over		       0x00000400 /* Rx Overflow		     */
#define Rx_CRCErr	       0x00000200 /* Rx CRC Error		     */
#define Rx_Align	       0x00000100 /* Rx Alignment Error		     */
#define Rx_10Stat	       0x00000080 /* Rx 10Mbps Status		     */
#define Rx_IntRx	       0x00000040 /* Rx Interrupt		     */
#define Rx_CtlRecd	       0x00000020 /* Rx Control Receive		     */
#define Rx_InLenErr	       0x00000010 /* Rx In Range Frame Length Error  */

#define Rx_Stat_Mask	       0x0000FFF0 /* Rx All Status Mask		     */

/* Int_En bit asign -------------------------------------------------------- */
#define Int_NRAbtEn	       0x00000800 /* 1:Non-recoverable Abort Enable  */
#define Int_TxCtlCmpEn	       0x00000400 /* 1:Transmit Ctl Complete Enable  */
#define Int_DmParErrEn	       0x00000200 /* 1:DMA Parity Error Enable	     */
#define Int_DParDEn	       0x00000100 /* 1:Data Parity Error Enable	     */
#define Int_EarNotEn	       0x00000080 /* 1:Early Notify Enable	     */
#define Int_DParErrEn	       0x00000040 /* 1:Detected Parity Error Enable  */
#define Int_SSysErrEn	       0x00000020 /* 1:Signalled System Error Enable */
#define Int_RMasAbtEn	       0x00000010 /* 1:Received Master Abort Enable  */
#define Int_RTargAbtEn	       0x00000008 /* 1:Received Target Abort Enable  */
#define Int_STargAbtEn	       0x00000004 /* 1:Signalled Target Abort Enable */
#define Int_BLExEn	       0x00000002 /* 1:Buffer List Exhausted Enable  */
#define Int_FDAExEn	       0x00000001 /* 1:Free Descriptor Area	     */
					  /*		   Exhausted Enable  */

/* Int_Src bit asign ------------------------------------------------------- */
#define Int_NRabt	       0x00004000 /* 1:Non Recoverable error	     */
#define Int_DmParErrStat       0x00002000 /* 1:DMA Parity Error & Clear	     */
#define Int_BLEx	       0x00001000 /* 1:Buffer List Empty & Clear     */
#define Int_FDAEx	       0x00000800 /* 1:FDA Empty & Clear	     */
#define Int_IntNRAbt	       0x00000400 /* 1:Non Recoverable Abort	     */
#define Int_IntCmp	       0x00000200 /* 1:MAC control packet complete   */
#define Int_IntExBD	       0x00000100 /* 1:Interrupt Extra BD & Clear    */
#define Int_DmParErr	       0x00000080 /* 1:DMA Parity Error & Clear	     */
#define Int_IntEarNot	       0x00000040 /* 1:Receive Data write & Clear    */
#define Int_SWInt	       0x00000020 /* 1:Software request & Clear	     */
#define Int_IntBLEx	       0x00000010 /* 1:Buffer List Empty & Clear     */
#define Int_IntFDAEx	       0x00000008 /* 1:FDA Empty & Clear	     */
#define Int_IntPCI	       0x00000004 /* 1:PCI controller & Clear	     */
#define Int_IntMacRx	       0x00000002 /* 1:Rx controller & Clear	     */
#define Int_IntMacTx	       0x00000001 /* 1:Tx controller & Clear	     */

/* MD_CA bit asign --------------------------------------------------------- */
#define MD_CA_PreSup	       0x00001000 /* 1:Preamble Supress		     */
#define MD_CA_Busy	       0x00000800 /* 1:Busy (Start Operation)	     */
#define MD_CA_Wr	       0x00000400 /* 1:Write 0:Read		     */


/*
 * Descriptors
 */

/* Frame descripter */
struct FDesc {
	volatile __u32 FDNext;
	volatile __u32 FDSystem;
	volatile __u32 FDStat;
	volatile __u32 FDCtl;
};

/* Buffer descripter */
struct BDesc {
	volatile __u32 BuffData;
	volatile __u32 BDCtl;
};

#define FD_ALIGN	16

/* Frame Descripter bit asign ---------------------------------------------- */
#define FD_FDLength_MASK       0x0000FFFF /* Length MASK		     */
#define FD_BDCnt_MASK	       0x001F0000 /* BD count MASK in FD	     */
#define FD_FrmOpt_MASK	       0x7C000000 /* Frame option MASK		     */
#define FD_FrmOpt_BigEndian    0x40000000 /* Tx/Rx */
#define FD_FrmOpt_IntTx	       0x20000000 /* Tx only */
#define FD_FrmOpt_NoCRC	       0x10000000 /* Tx only */
#define FD_FrmOpt_NoPadding    0x08000000 /* Tx only */
#define FD_FrmOpt_Packing      0x04000000 /* Rx only */
#define FD_CownsFD	       0x80000000 /* FD Controller owner bit	     */
#define FD_Next_EOL	       0x00000001 /* FD EOL indicator		     */
#define FD_BDCnt_SHIFT	       16

/* Buffer Descripter bit asign --------------------------------------------- */
#define BD_BuffLength_MASK     0x0000FFFF /* Recieve Data Size		     */
#define BD_RxBDID_MASK	       0x00FF0000 /* BD ID Number MASK		     */
#define BD_RxBDSeqN_MASK       0x7F000000 /* Rx BD Sequence Number	     */
#define BD_CownsBD	       0x80000000 /* BD Controller owner bit	     */
#define BD_RxBDID_SHIFT	       16
#define BD_RxBDSeqN_SHIFT      24


/* Some useful constants. */
#undef NO_CHECK_CARRIER	/* Does not check No-Carrier with TP */

#ifdef NO_CHECK_CARRIER
#define TX_CTL_CMD	(Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
	Tx_EnExColl | Tx_EnExDefer | Tx_EnUnder | \
	Tx_En)	/* maybe  0x7b01 */
#else
#define TX_CTL_CMD	(Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
	Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
	Tx_En)	/* maybe  0x7b01 */
#endif
#define RX_CTL_CMD	(Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
	| Rx_EnCRCErr | Rx_EnAlign | Rx_StripCRC | Rx_RxEn) /* maybe 0x6f11 */
#define INT_EN_CMD  (Int_NRAbtEn | \
	Int_DmParErrEn | Int_DParDEn | Int_DParErrEn | \
	Int_SSysErrEn  | Int_RMasAbtEn | Int_RTargAbtEn | \
	Int_STargAbtEn | \
	Int_BLExEn  | Int_FDAExEn) /* maybe 0xb7f*/
#define DMA_CTL_CMD	DMA_BURST_SIZE
#define HAVE_DMA_RXALIGN(lp)	likely((lp)->chiptype != TC35815CF)

/* Tuning parameters */
#define DMA_BURST_SIZE	32
#define TX_THRESHOLD	1024
/* used threshold with packet max byte for low pci transfer ability.*/
#define TX_THRESHOLD_MAX 1536
/* setting threshold max value when overrun error occured this count. */
#define TX_THRESHOLD_KEEP_LIMIT 10

/* 16 + RX_BUF_NUM * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*FD_PAGE_NUM */
#ifdef TC35815_USE_PACKEDBUFFER
#define FD_PAGE_NUM 2
#define RX_BUF_NUM	8	/* >= 2 */
#define RX_FD_NUM	250	/* >= 32 */
#define TX_FD_NUM	128
#define RX_BUF_SIZE	PAGE_SIZE
#else /* TC35815_USE_PACKEDBUFFER */
#define FD_PAGE_NUM 4
#define RX_BUF_NUM	128	/* < 256 */
#define RX_FD_NUM	256	/* >= 32 */
#define TX_FD_NUM	128
#if RX_CTL_CMD & Rx_LongEn
#define RX_BUF_SIZE	PAGE_SIZE
#elif RX_CTL_CMD & Rx_StripCRC
#define RX_BUF_SIZE	\
	L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + NET_IP_ALIGN)
#else
#define RX_BUF_SIZE	\
	L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN + NET_IP_ALIGN)
#endif
#endif /* TC35815_USE_PACKEDBUFFER */
#define RX_FD_RESERVE	(2 / 2)	/* max 2 BD per RxFD */
#define NAPI_WEIGHT	16

struct TxFD {
	struct FDesc fd;
	struct BDesc bd;
	struct BDesc unused;
};

struct RxFD {
	struct FDesc fd;
	struct BDesc bd[0];	/* variable length */
};

struct FrFD {
	struct FDesc fd;
	struct BDesc bd[RX_BUF_NUM];
};


#define tc_readl(addr)	ioread32(addr)
#define tc_writel(d, addr)	iowrite32(d, addr)

#define TC35815_TX_TIMEOUT  msecs_to_jiffies(400)

/* Information that need to be kept for each controller. */
struct tc35815_local {
	struct pci_dev *pci_dev;

	struct net_device *dev;
	struct napi_struct napi;

	/* statistics */
	struct {
		int max_tx_qlen;
		int tx_ints;
		int rx_ints;
		int tx_underrun;
	} lstats;

	/* Tx control lock.  This protects the transmit buffer ring
	 * state along with the "tx full" state of the driver.  This
	 * means all netif_queue flow control actions are protected
	 * by this lock as well.
	 */
	spinlock_t lock;

	struct mii_bus *mii_bus;
	struct phy_device *phy_dev;
	int duplex;
	int speed;
	int link;
	struct work_struct restart_work;

	/*
	 * Transmitting: Batch Mode.
	 *	1 BD in 1 TxFD.
	 * Receiving: Packing Mode. (TC35815_USE_PACKEDBUFFER)
	 *	1 circular FD for Free Buffer List.
	 *	RX_BUF_NUM BD in Free Buffer FD.
	 *	One Free Buffer BD has PAGE_SIZE data buffer.
	 * Or Non-Packing Mode.
	 *	1 circular FD for Free Buffer List.
	 *	RX_BUF_NUM BD in Free Buffer FD.
	 *	One Free Buffer BD has ETH_FRAME_LEN data buffer.
	 */
	void *fd_buf;	/* for TxFD, RxFD, FrFD */
	dma_addr_t fd_buf_dma;
	struct TxFD *tfd_base;
	unsigned int tfd_start;
	unsigned int tfd_end;
	struct RxFD *rfd_base;
	struct RxFD *rfd_limit;
	struct RxFD *rfd_cur;
	struct FrFD *fbl_ptr;
#ifdef TC35815_USE_PACKEDBUFFER
	unsigned char fbl_curid;
	void *data_buf[RX_BUF_NUM];		/* packing */
	dma_addr_t data_buf_dma[RX_BUF_NUM];
	struct {
		struct sk_buff *skb;
		dma_addr_t skb_dma;
	} tx_skbs[TX_FD_NUM];
#else
	unsigned int fbl_count;
	struct {
		struct sk_buff *skb;
		dma_addr_t skb_dma;
	} tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
#endif
	u32 msg_enable;
	enum tc35815_chiptype chiptype;
};

static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
{
	return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
}
#ifdef DEBUG
static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
{
	return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
}
#endif
#ifdef TC35815_USE_PACKEDBUFFER
static inline void *rxbuf_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
{
	int i;
	for (i = 0; i < RX_BUF_NUM; i++) {
		if (bus >= lp->data_buf_dma[i] &&
		    bus < lp->data_buf_dma[i] + PAGE_SIZE)
			return (void *)((u8 *)lp->data_buf[i] +
					(bus - lp->data_buf_dma[i]));
	}
	return NULL;
}

#define TC35815_DMA_SYNC_ONDEMAND
static void *alloc_rxbuf_page(struct pci_dev *hwdev, dma_addr_t *dma_handle)
{
#ifdef TC35815_DMA_SYNC_ONDEMAND
	void *buf;
	/* pci_map + pci_dma_sync will be more effective than
	 * pci_alloc_consistent on some archs. */
	buf = (void *)__get_free_page(GFP_ATOMIC);
	if (!buf)
		return NULL;
	*dma_handle = pci_map_single(hwdev, buf, PAGE_SIZE,
				     PCI_DMA_FROMDEVICE);
	if (pci_dma_mapping_error(hwdev, *dma_handle)) {
		free_page((unsigned long)buf);
		return NULL;
	}
	return buf;
#else
	return pci_alloc_consistent(hwdev, PAGE_SIZE, dma_handle);
#endif
}

static void free_rxbuf_page(struct pci_dev *hwdev, void *buf, dma_addr_t dma_handle)
{
#ifdef TC35815_DMA_SYNC_ONDEMAND
	pci_unmap_single(hwdev, dma_handle, PAGE_SIZE, PCI_DMA_FROMDEVICE);
	free_page((unsigned long)buf);
#else
	pci_free_consistent(hwdev, PAGE_SIZE, buf, dma_handle);
#endif
}
#else /* TC35815_USE_PACKEDBUFFER */
static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
				       struct pci_dev *hwdev,
				       dma_addr_t *dma_handle)
{
	struct sk_buff *skb;
	skb = dev_alloc_skb(RX_BUF_SIZE);
	if (!skb)
		return NULL;
	*dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
				     PCI_DMA_FROMDEVICE);
	if (pci_dma_mapping_error(hwdev, *dma_handle)) {
		dev_kfree_skb_any(skb);
		return NULL;
	}
	skb_reserve(skb, 2);	/* make IP header 4byte aligned */
	return skb;
}

static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
{
	pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
			 PCI_DMA_FROMDEVICE);
	dev_kfree_skb_any(skb);
}
#endif /* TC35815_USE_PACKEDBUFFER */

/* Index to functions, as function prototypes. */

static int	tc35815_open(struct net_device *dev);
static int	tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t	tc35815_interrupt(int irq, void *dev_id);
#ifdef TC35815_NAPI
static int	tc35815_rx(struct net_device *dev, int limit);
static int	tc35815_poll(struct napi_struct *napi, int budget);
#else
static void	tc35815_rx(struct net_device *dev);
#endif
static void	tc35815_txdone(struct net_device *dev);
static int	tc35815_close(struct net_device *dev);
static struct	net_device_stats *tc35815_get_stats(struct net_device *dev);
static void	tc35815_set_multicast_list(struct net_device *dev);
static void	tc35815_tx_timeout(struct net_device *dev);
static int	tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
#ifdef CONFIG_NET_POLL_CONTROLLER
static void	tc35815_poll_controller(struct net_device *dev);
#endif
static const struct ethtool_ops tc35815_ethtool_ops;

/* Example routines you must write ;->. */
static void	tc35815_chip_reset(struct net_device *dev);
static void	tc35815_chip_init(struct net_device *dev);

#ifdef DEBUG
static void	panic_queues(struct net_device *dev);
#endif

static void tc35815_restart_work(struct work_struct *work);

static int tc_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
{
	struct net_device *dev = bus->priv;
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;
	unsigned long timeout = jiffies + 10;

	tc_writel(MD_CA_Busy | (mii_id << 5) | (regnum & 0x1f), &tr->MD_CA);
	while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
		if (time_after(jiffies, timeout))
			return -EIO;
		cpu_relax();
	}
	return tc_readl(&tr->MD_Data) & 0xffff;
}

static int tc_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 val)
{
	struct net_device *dev = bus->priv;
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;
	unsigned long timeout = jiffies + 10;

	tc_writel(val, &tr->MD_Data);
	tc_writel(MD_CA_Busy | MD_CA_Wr | (mii_id << 5) | (regnum & 0x1f),
		  &tr->MD_CA);
	while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
		if (time_after(jiffies, timeout))
			return -EIO;
		cpu_relax();
	}
	return 0;
}

static void tc_handle_link_change(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	struct phy_device *phydev = lp->phy_dev;
	unsigned long flags;
	int status_change = 0;

	spin_lock_irqsave(&lp->lock, flags);
	if (phydev->link &&
	    (lp->speed != phydev->speed || lp->duplex != phydev->duplex)) {
		struct tc35815_regs __iomem *tr =
			(struct tc35815_regs __iomem *)dev->base_addr;
		u32 reg;

		reg = tc_readl(&tr->MAC_Ctl);
		reg |= MAC_HaltReq;
		tc_writel(reg, &tr->MAC_Ctl);
		if (phydev->duplex == DUPLEX_FULL)
			reg |= MAC_FullDup;
		else
			reg &= ~MAC_FullDup;
		tc_writel(reg, &tr->MAC_Ctl);
		reg &= ~MAC_HaltReq;
		tc_writel(reg, &tr->MAC_Ctl);

		/*
		 * TX4939 PCFG.SPEEDn bit will be changed on
		 * NETDEV_CHANGE event.
		 */

#if !defined(NO_CHECK_CARRIER) && defined(WORKAROUND_LOSTCAR)
		/*
		 * WORKAROUND: enable LostCrS only if half duplex
		 * operation.
		 * (TX4939 does not have EnLCarr)
		 */
		if (phydev->duplex == DUPLEX_HALF &&
		    lp->chiptype != TC35815_TX4939)
			tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr,
				  &tr->Tx_Ctl);
#endif

		lp->speed = phydev->speed;
		lp->duplex = phydev->duplex;
		status_change = 1;
	}

	if (phydev->link != lp->link) {
		if (phydev->link) {
#ifdef WORKAROUND_100HALF_PROMISC
			/* delayed promiscuous enabling */
			if (dev->flags & IFF_PROMISC)
				tc35815_set_multicast_list(dev);
#endif
		} else {
			lp->speed = 0;
			lp->duplex = -1;
		}
		lp->link = phydev->link;

		status_change = 1;
	}
	spin_unlock_irqrestore(&lp->lock, flags);

	if (status_change && netif_msg_link(lp)) {
		phy_print_status(phydev);
		pr_debug("%s: MII BMCR %04x BMSR %04x LPA %04x\n",
			 dev->name,
			 phy_read(phydev, MII_BMCR),
			 phy_read(phydev, MII_BMSR),
			 phy_read(phydev, MII_LPA));
	}
}

static int tc_mii_probe(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	struct phy_device *phydev = NULL;
	int phy_addr;
	u32 dropmask;

	/* find the first phy */
	for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
		if (lp->mii_bus->phy_map[phy_addr]) {
			if (phydev) {
				printk(KERN_ERR "%s: multiple PHYs found\n",
				       dev->name);
				return -EINVAL;
			}
			phydev = lp->mii_bus->phy_map[phy_addr];
			break;
		}
	}

	if (!phydev) {
		printk(KERN_ERR "%s: no PHY found\n", dev->name);
		return -ENODEV;
	}

	/* attach the mac to the phy */
	phydev = phy_connect(dev, dev_name(&phydev->dev),
			     &tc_handle_link_change, 0,
			     lp->chiptype == TC35815_TX4939 ?
			     PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII);
	if (IS_ERR(phydev)) {
		printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
		return PTR_ERR(phydev);
	}
	printk(KERN_INFO "%s: attached PHY driver [%s] "
		"(mii_bus:phy_addr=%s, id=%x)\n",
		dev->name, phydev->drv->name, dev_name(&phydev->dev),
		phydev->phy_id);

	/* mask with MAC supported features */
	phydev->supported &= PHY_BASIC_FEATURES;
	dropmask = 0;
	if (options.speed == 10)
		dropmask |= SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full;
	else if (options.speed == 100)
		dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
	if (options.duplex == 1)
		dropmask |= SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Full;
	else if (options.duplex == 2)
		dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_100baseT_Half;
	phydev->supported &= ~dropmask;
	phydev->advertising = phydev->supported;

	lp->link = 0;
	lp->speed = 0;
	lp->duplex = -1;
	lp->phy_dev = phydev;

	return 0;
}

static int tc_mii_init(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	int err;
	int i;

	lp->mii_bus = mdiobus_alloc();
	if (lp->mii_bus == NULL) {
		err = -ENOMEM;
		goto err_out;
	}

	lp->mii_bus->name = "tc35815_mii_bus";
	lp->mii_bus->read = tc_mdio_read;
	lp->mii_bus->write = tc_mdio_write;
	snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%x",
		 (lp->pci_dev->bus->number << 8) | lp->pci_dev->devfn);
	lp->mii_bus->priv = dev;
	lp->mii_bus->parent = &lp->pci_dev->dev;
	lp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
	if (!lp->mii_bus->irq) {
		err = -ENOMEM;
		goto err_out_free_mii_bus;
	}

	for (i = 0; i < PHY_MAX_ADDR; i++)
		lp->mii_bus->irq[i] = PHY_POLL;

	err = mdiobus_register(lp->mii_bus);
	if (err)
		goto err_out_free_mdio_irq;
	err = tc_mii_probe(dev);
	if (err)
		goto err_out_unregister_bus;
	return 0;

err_out_unregister_bus:
	mdiobus_unregister(lp->mii_bus);
err_out_free_mdio_irq:
	kfree(lp->mii_bus->irq);
err_out_free_mii_bus:
	mdiobus_free(lp->mii_bus);
err_out:
	return err;
}

#ifdef CONFIG_CPU_TX49XX
/*
 * Find a platform_device providing a MAC address.  The platform code
 * should provide a "tc35815-mac" device with a MAC address in its
 * platform_data.
 */
static int __devinit tc35815_mac_match(struct device *dev, void *data)
{
	struct platform_device *plat_dev = to_platform_device(dev);
	struct pci_dev *pci_dev = data;
	unsigned int id = pci_dev->irq;
	return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
}

static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	struct device *pd = bus_find_device(&platform_bus_type, NULL,
					    lp->pci_dev, tc35815_mac_match);
	if (pd) {
		if (pd->platform_data)
			memcpy(dev->dev_addr, pd->platform_data, ETH_ALEN);
		put_device(pd);
		return is_valid_ether_addr(dev->dev_addr) ? 0 : -ENODEV;
	}
	return -ENODEV;
}
#else
static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
{
	return -ENODEV;
}
#endif

static int __devinit tc35815_init_dev_addr(struct net_device *dev)
{
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;
	int i;

	while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
		;
	for (i = 0; i < 6; i += 2) {
		unsigned short data;
		tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
		while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
			;
		data = tc_readl(&tr->PROM_Data);
		dev->dev_addr[i] = data & 0xff;
		dev->dev_addr[i+1] = data >> 8;
	}
	if (!is_valid_ether_addr(dev->dev_addr))
		return tc35815_read_plat_dev_addr(dev);
	return 0;
}

static const struct net_device_ops tc35815_netdev_ops = {
	.ndo_open		= tc35815_open,
	.ndo_stop		= tc35815_close,
	.ndo_start_xmit		= tc35815_send_packet,
	.ndo_get_stats		= tc35815_get_stats,
	.ndo_set_multicast_list	= tc35815_set_multicast_list,
	.ndo_tx_timeout		= tc35815_tx_timeout,
	.ndo_do_ioctl		= tc35815_ioctl,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_set_mac_address	= eth_mac_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= tc35815_poll_controller,
#endif
};

static int __devinit tc35815_init_one(struct pci_dev *pdev,
				      const struct pci_device_id *ent)
{
	void __iomem *ioaddr = NULL;
	struct net_device *dev;
	struct tc35815_local *lp;
	int rc;

	static int printed_version;
	if (!printed_version++) {
		printk(version);
		dev_printk(KERN_DEBUG, &pdev->dev,
			   "speed:%d duplex:%d\n",
			   options.speed, options.duplex);
	}

	if (!pdev->irq) {
		dev_warn(&pdev->dev, "no IRQ assigned.\n");
		return -ENODEV;
	}

	/* dev zeroed in alloc_etherdev */
	dev = alloc_etherdev(sizeof(*lp));
	if (dev == NULL) {
		dev_err(&pdev->dev, "unable to alloc new ethernet\n");
		return -ENOMEM;
	}
	SET_NETDEV_DEV(dev, &pdev->dev);
	lp = netdev_priv(dev);
	lp->dev = dev;

	/* enable device (incl. PCI PM wakeup), and bus-mastering */
	rc = pcim_enable_device(pdev);
	if (rc)
		goto err_out;
	rc = pcim_iomap_regions(pdev, 1 << 1, MODNAME);
	if (rc)
		goto err_out;
	pci_set_master(pdev);
	ioaddr = pcim_iomap_table(pdev)[1];

	/* Initialize the device structure. */
	dev->netdev_ops = &tc35815_netdev_ops;
	dev->ethtool_ops = &tc35815_ethtool_ops;
	dev->watchdog_timeo = TC35815_TX_TIMEOUT;
#ifdef TC35815_NAPI
	netif_napi_add(dev, &lp->napi, tc35815_poll, NAPI_WEIGHT);
#endif

	dev->irq = pdev->irq;
	dev->base_addr = (unsigned long)ioaddr;

	INIT_WORK(&lp->restart_work, tc35815_restart_work);
	spin_lock_init(&lp->lock);
	lp->pci_dev = pdev;
	lp->chiptype = ent->driver_data;

	lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
	pci_set_drvdata(pdev, dev);

	/* Soft reset the chip. */
	tc35815_chip_reset(dev);

	/* Retrieve the ethernet address. */
	if (tc35815_init_dev_addr(dev)) {
		dev_warn(&pdev->dev, "not valid ether addr\n");
		random_ether_addr(dev->dev_addr);
	}

	rc = register_netdev(dev);
	if (rc)
		goto err_out;

	memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
	printk(KERN_INFO "%s: %s at 0x%lx, %pM, IRQ %d\n",
		dev->name,
		chip_info[ent->driver_data].name,
		dev->base_addr,
		dev->dev_addr,
		dev->irq);

	rc = tc_mii_init(dev);
	if (rc)
		goto err_out_unregister;

	return 0;

err_out_unregister:
	unregister_netdev(dev);
err_out:
	free_netdev(dev);
	return rc;
}


static void __devexit tc35815_remove_one(struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct tc35815_local *lp = netdev_priv(dev);

	phy_disconnect(lp->phy_dev);
	mdiobus_unregister(lp->mii_bus);
	kfree(lp->mii_bus->irq);
	mdiobus_free(lp->mii_bus);
	unregister_netdev(dev);
	free_netdev(dev);
	pci_set_drvdata(pdev, NULL);
}

static int
tc35815_init_queues(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	int i;
	unsigned long fd_addr;

	if (!lp->fd_buf) {
		BUG_ON(sizeof(struct FDesc) +
		       sizeof(struct BDesc) * RX_BUF_NUM +
		       sizeof(struct FDesc) * RX_FD_NUM +
		       sizeof(struct TxFD) * TX_FD_NUM >
		       PAGE_SIZE * FD_PAGE_NUM);

		lp->fd_buf = pci_alloc_consistent(lp->pci_dev,
						  PAGE_SIZE * FD_PAGE_NUM,
						  &lp->fd_buf_dma);
		if (!lp->fd_buf)
			return -ENOMEM;
		for (i = 0; i < RX_BUF_NUM; i++) {
#ifdef TC35815_USE_PACKEDBUFFER
			lp->data_buf[i] =
				alloc_rxbuf_page(lp->pci_dev,
						 &lp->data_buf_dma[i]);
			if (!lp->data_buf[i]) {
				while (--i >= 0) {
					free_rxbuf_page(lp->pci_dev,
							lp->data_buf[i],
							lp->data_buf_dma[i]);
					lp->data_buf[i] = NULL;
				}
				pci_free_consistent(lp->pci_dev,
						    PAGE_SIZE * FD_PAGE_NUM,
						    lp->fd_buf,
						    lp->fd_buf_dma);
				lp->fd_buf = NULL;
				return -ENOMEM;
			}
#else
			lp->rx_skbs[i].skb =
				alloc_rxbuf_skb(dev, lp->pci_dev,
						&lp->rx_skbs[i].skb_dma);
			if (!lp->rx_skbs[i].skb) {
				while (--i >= 0) {
					free_rxbuf_skb(lp->pci_dev,
						       lp->rx_skbs[i].skb,
						       lp->rx_skbs[i].skb_dma);
					lp->rx_skbs[i].skb = NULL;
				}
				pci_free_consistent(lp->pci_dev,
						    PAGE_SIZE * FD_PAGE_NUM,
						    lp->fd_buf,
						    lp->fd_buf_dma);
				lp->fd_buf = NULL;
				return -ENOMEM;
			}
#endif
		}
		printk(KERN_DEBUG "%s: FD buf %p DataBuf",
		       dev->name, lp->fd_buf);
#ifdef TC35815_USE_PACKEDBUFFER
		printk(" DataBuf");
		for (i = 0; i < RX_BUF_NUM; i++)
			printk(" %p", lp->data_buf[i]);
#endif
		printk("\n");
	} else {
		for (i = 0; i < FD_PAGE_NUM; i++)
			clear_page((void *)((unsigned long)lp->fd_buf +
					    i * PAGE_SIZE));
	}
	fd_addr = (unsigned long)lp->fd_buf;

	/* Free Descriptors (for Receive) */
	lp->rfd_base = (struct RxFD *)fd_addr;
	fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
	for (i = 0; i < RX_FD_NUM; i++)
		lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
	lp->rfd_cur = lp->rfd_base;
	lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);

	/* Transmit Descriptors */
	lp->tfd_base = (struct TxFD *)fd_addr;
	fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
	for (i = 0; i < TX_FD_NUM; i++) {
		lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
		lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
		lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
	}
	lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
	lp->tfd_start = 0;
	lp->tfd_end = 0;

	/* Buffer List (for Receive) */
	lp->fbl_ptr = (struct FrFD *)fd_addr;
	lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
	lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
#ifndef TC35815_USE_PACKEDBUFFER
	/*
	 * move all allocated skbs to head of rx_skbs[] array.
	 * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
	 * tc35815_rx() had failed.
	 */
	lp->fbl_count = 0;
	for (i = 0; i < RX_BUF_NUM; i++) {
		if (lp->rx_skbs[i].skb) {
			if (i != lp->fbl_count) {
				lp->rx_skbs[lp->fbl_count].skb =
					lp->rx_skbs[i].skb;
				lp->rx_skbs[lp->fbl_count].skb_dma =
					lp->rx_skbs[i].skb_dma;
			}
			lp->fbl_count++;
		}
	}
#endif
	for (i = 0; i < RX_BUF_NUM; i++) {
#ifdef TC35815_USE_PACKEDBUFFER
		lp->fbl_ptr->bd[i].BuffData = cpu_to_le32(lp->data_buf_dma[i]);
#else
		if (i >= lp->fbl_count) {
			lp->fbl_ptr->bd[i].BuffData = 0;
			lp->fbl_ptr->bd[i].BDCtl = 0;
			continue;
		}
		lp->fbl_ptr->bd[i].BuffData =
			cpu_to_le32(lp->rx_skbs[i].skb_dma);
#endif
		/* BDID is index of FrFD.bd[] */
		lp->fbl_ptr->bd[i].BDCtl =
			cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
				    RX_BUF_SIZE);
	}
#ifdef TC35815_USE_PACKEDBUFFER
	lp->fbl_curid = 0;
#endif

	printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
	       dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
	return 0;
}

static void
tc35815_clear_queues(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	int i;

	for (i = 0; i < TX_FD_NUM; i++) {
		u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
		struct sk_buff *skb =
			fdsystem != 0xffffffff ?
			lp->tx_skbs[fdsystem].skb : NULL;
#ifdef DEBUG
		if (lp->tx_skbs[i].skb != skb) {
			printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
			panic_queues(dev);
		}
#else
		BUG_ON(lp->tx_skbs[i].skb != skb);
#endif
		if (skb) {
			pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
			lp->tx_skbs[i].skb = NULL;
			lp->tx_skbs[i].skb_dma = 0;
			dev_kfree_skb_any(skb);
		}
		lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
	}

	tc35815_init_queues(dev);
}

static void
tc35815_free_queues(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	int i;

	if (lp->tfd_base) {
		for (i = 0; i < TX_FD_NUM; i++) {
			u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
			struct sk_buff *skb =
				fdsystem != 0xffffffff ?
				lp->tx_skbs[fdsystem].skb : NULL;
#ifdef DEBUG
			if (lp->tx_skbs[i].skb != skb) {
				printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
				panic_queues(dev);
			}
#else
			BUG_ON(lp->tx_skbs[i].skb != skb);
#endif
			if (skb) {
				dev_kfree_skb(skb);
				pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
				lp->tx_skbs[i].skb = NULL;
				lp->tx_skbs[i].skb_dma = 0;
			}
			lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
		}
	}

	lp->rfd_base = NULL;
	lp->rfd_limit = NULL;
	lp->rfd_cur = NULL;
	lp->fbl_ptr = NULL;

	for (i = 0; i < RX_BUF_NUM; i++) {
#ifdef TC35815_USE_PACKEDBUFFER
		if (lp->data_buf[i]) {
			free_rxbuf_page(lp->pci_dev,
					lp->data_buf[i], lp->data_buf_dma[i]);
			lp->data_buf[i] = NULL;
		}
#else
		if (lp->rx_skbs[i].skb) {
			free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
				       lp->rx_skbs[i].skb_dma);
			lp->rx_skbs[i].skb = NULL;
		}
#endif
	}
	if (lp->fd_buf) {
		pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
				    lp->fd_buf, lp->fd_buf_dma);
		lp->fd_buf = NULL;
	}
}

static void
dump_txfd(struct TxFD *fd)
{
	printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
	       le32_to_cpu(fd->fd.FDNext),
	       le32_to_cpu(fd->fd.FDSystem),
	       le32_to_cpu(fd->fd.FDStat),
	       le32_to_cpu(fd->fd.FDCtl));
	printk("BD: ");
	printk(" %08x %08x",
	       le32_to_cpu(fd->bd.BuffData),
	       le32_to_cpu(fd->bd.BDCtl));
	printk("\n");
}

static int
dump_rxfd(struct RxFD *fd)
{
	int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
	if (bd_count > 8)
		bd_count = 8;
	printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
	       le32_to_cpu(fd->fd.FDNext),
	       le32_to_cpu(fd->fd.FDSystem),
	       le32_to_cpu(fd->fd.FDStat),
	       le32_to_cpu(fd->fd.FDCtl));
	if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
		return 0;
	printk("BD: ");
	for (i = 0; i < bd_count; i++)
		printk(" %08x %08x",
		       le32_to_cpu(fd->bd[i].BuffData),
		       le32_to_cpu(fd->bd[i].BDCtl));
	printk("\n");
	return bd_count;
}

#if defined(DEBUG) || defined(TC35815_USE_PACKEDBUFFER)
static void
dump_frfd(struct FrFD *fd)
{
	int i;
	printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
	       le32_to_cpu(fd->fd.FDNext),
	       le32_to_cpu(fd->fd.FDSystem),
	       le32_to_cpu(fd->fd.FDStat),
	       le32_to_cpu(fd->fd.FDCtl));
	printk("BD: ");
	for (i = 0; i < RX_BUF_NUM; i++)
		printk(" %08x %08x",
		       le32_to_cpu(fd->bd[i].BuffData),
		       le32_to_cpu(fd->bd[i].BDCtl));
	printk("\n");
}
#endif

#ifdef DEBUG
static void
panic_queues(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	int i;

	printk("TxFD base %p, start %u, end %u\n",
	       lp->tfd_base, lp->tfd_start, lp->tfd_end);
	printk("RxFD base %p limit %p cur %p\n",
	       lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
	printk("FrFD %p\n", lp->fbl_ptr);
	for (i = 0; i < TX_FD_NUM; i++)
		dump_txfd(&lp->tfd_base[i]);
	for (i = 0; i < RX_FD_NUM; i++) {
		int bd_count = dump_rxfd(&lp->rfd_base[i]);
		i += (bd_count + 1) / 2;	/* skip BDs */
	}
	dump_frfd(lp->fbl_ptr);
	panic("%s: Illegal queue state.", dev->name);
}
#endif

static void print_eth(const u8 *add)
{
	printk(KERN_DEBUG "print_eth(%p)\n", add);
	printk(KERN_DEBUG " %pM => %pM : %02x%02x\n",
		add + 6, add, add[12], add[13]);
}

static int tc35815_tx_full(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	return ((lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end);
}

static void tc35815_restart(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);

	if (lp->phy_dev) {
		int timeout;

		phy_write(lp->phy_dev, MII_BMCR, BMCR_RESET);
		timeout = 100;
		while (--timeout) {
			if (!(phy_read(lp->phy_dev, MII_BMCR) & BMCR_RESET))
				break;
			udelay(1);
		}
		if (!timeout)
			printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
	}

	spin_lock_irq(&lp->lock);
	tc35815_chip_reset(dev);
	tc35815_clear_queues(dev);
	tc35815_chip_init(dev);
	/* Reconfigure CAM again since tc35815_chip_init() initialize it. */
	tc35815_set_multicast_list(dev);
	spin_unlock_irq(&lp->lock);

	netif_wake_queue(dev);
}

static void tc35815_restart_work(struct work_struct *work)
{
	struct tc35815_local *lp =
		container_of(work, struct tc35815_local, restart_work);
	struct net_device *dev = lp->dev;

	tc35815_restart(dev);
}

static void tc35815_schedule_restart(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;

	/* disable interrupts */
	tc_writel(0, &tr->Int_En);
	tc_writel(tc_readl(&tr->DMA_Ctl) | DMA_IntMask, &tr->DMA_Ctl);
	schedule_work(&lp->restart_work);
}

static void tc35815_tx_timeout(struct net_device *dev)
{
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;

	printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
	       dev->name, tc_readl(&tr->Tx_Stat));

	/* Try to restart the adaptor. */
	tc35815_schedule_restart(dev);
	dev->stats.tx_errors++;
}

/*
 * Open/initialize the controller. This is called (in the current kernel)
 * sometime after booting when the 'ifconfig' program is run.
 *
 * This routine should set everything up anew at each open, even
 * registers that "should" only need to be set once at boot, so that
 * there is non-reboot way to recover if something goes wrong.
 */
static int
tc35815_open(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);

	/*
	 * This is used if the interrupt line can turned off (shared).
	 * See 3c503.c for an example of selecting the IRQ at config-time.
	 */
	if (request_irq(dev->irq, &tc35815_interrupt, IRQF_SHARED,
			dev->name, dev))
		return -EAGAIN;

	tc35815_chip_reset(dev);

	if (tc35815_init_queues(dev) != 0) {
		free_irq(dev->irq, dev);
		return -EAGAIN;
	}

#ifdef TC35815_NAPI
	napi_enable(&lp->napi);
#endif

	/* Reset the hardware here. Don't forget to set the station address. */
	spin_lock_irq(&lp->lock);
	tc35815_chip_init(dev);
	spin_unlock_irq(&lp->lock);

	netif_carrier_off(dev);
	/* schedule a link state check */
	phy_start(lp->phy_dev);

	/* We are now ready to accept transmit requeusts from
	 * the queueing layer of the networking.
	 */
	netif_start_queue(dev);

	return 0;
}

/* This will only be invoked if your driver is _not_ in XOFF state.
 * What this means is that you need not check it, and that this
 * invariant will hold if you make sure that the netif_*_queue()
 * calls are done at the proper times.
 */
static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	struct TxFD *txfd;
	unsigned long flags;

	/* If some error occurs while trying to transmit this
	 * packet, you should return '1' from this function.
	 * In such a case you _may not_ do anything to the
	 * SKB, it is still owned by the network queueing
	 * layer when an error is returned.  This means you
	 * may not modify any SKB fields, you may not free
	 * the SKB, etc.
	 */

	/* This is the most common case for modern hardware.
	 * The spinlock protects this code from the TX complete
	 * hardware interrupt handler.  Queue flow control is
	 * thus managed under this lock as well.
	 */
	spin_lock_irqsave(&lp->lock, flags);

	/* failsafe... (handle txdone now if half of FDs are used) */
	if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
	    TX_FD_NUM / 2)
		tc35815_txdone(dev);

	if (netif_msg_pktdata(lp))
		print_eth(skb->data);
#ifdef DEBUG
	if (lp->tx_skbs[lp->tfd_start].skb) {
		printk("%s: tx_skbs conflict.\n", dev->name);
		panic_queues(dev);
	}
#else
	BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
#endif
	lp->tx_skbs[lp->tfd_start].skb = skb;
	lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);

	/*add to ring */
	txfd = &lp->tfd_base[lp->tfd_start];
	txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
	txfd->bd.BDCtl = cpu_to_le32(skb->len);
	txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
	txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));

	if (lp->tfd_start == lp->tfd_end) {
		struct tc35815_regs __iomem *tr =
			(struct tc35815_regs __iomem *)dev->base_addr;
		/* Start DMA Transmitter. */
		txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
#ifdef GATHER_TXINT
		txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
#endif
		if (netif_msg_tx_queued(lp)) {
			printk("%s: starting TxFD.\n", dev->name);
			dump_txfd(txfd);
		}
		tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
	} else {
		txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
		if (netif_msg_tx_queued(lp)) {
			printk("%s: queueing TxFD.\n", dev->name);
			dump_txfd(txfd);
		}
	}
	lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;

	dev->trans_start = jiffies;

	/* If we just used up the very last entry in the
	 * TX ring on this device, tell the queueing
	 * layer to send no more.
	 */
	if (tc35815_tx_full(dev)) {
		if (netif_msg_tx_queued(lp))
			printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
		netif_stop_queue(dev);
	}

	/* When the TX completion hw interrupt arrives, this
	 * is when the transmit statistics are updated.
	 */

	spin_unlock_irqrestore(&lp->lock, flags);
	return NETDEV_TX_OK;
}

#define FATAL_ERROR_INT \
	(Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
{
	static int count;
	printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
	       dev->name, status);
	if (status & Int_IntPCI)
		printk(" IntPCI");
	if (status & Int_DmParErr)
		printk(" DmParErr");
	if (status & Int_IntNRAbt)
		printk(" IntNRAbt");
	printk("\n");
	if (count++ > 100)
		panic("%s: Too many fatal errors.", dev->name);
	printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
	/* Try to restart the adaptor. */
	tc35815_schedule_restart(dev);
}

#ifdef TC35815_NAPI
static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
#else
static int tc35815_do_interrupt(struct net_device *dev, u32 status)
#endif
{
	struct tc35815_local *lp = netdev_priv(dev);
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;
	int ret = -1;

	/* Fatal errors... */
	if (status & FATAL_ERROR_INT) {
		tc35815_fatal_error_interrupt(dev, status);
		return 0;
	}
	/* recoverable errors */
	if (status & Int_IntFDAEx) {
		/* disable FDAEx int. (until we make rooms...) */
		tc_writel(tc_readl(&tr->Int_En) & ~Int_FDAExEn, &tr->Int_En);
		printk(KERN_WARNING
		       "%s: Free Descriptor Area Exhausted (%#x).\n",
		       dev->name, status);
		dev->stats.rx_dropped++;
		ret = 0;
	}
	if (status & Int_IntBLEx) {
		/* disable BLEx int. (until we make rooms...) */
		tc_writel(tc_readl(&tr->Int_En) & ~Int_BLExEn, &tr->Int_En);
		printk(KERN_WARNING
		       "%s: Buffer List Exhausted (%#x).\n",
		       dev->name, status);
		dev->stats.rx_dropped++;
		ret = 0;
	}
	if (status & Int_IntExBD) {
		printk(KERN_WARNING
		       "%s: Excessive Buffer Descriptiors (%#x).\n",
		       dev->name, status);
		dev->stats.rx_length_errors++;
		ret = 0;
	}

	/* normal notification */
	if (status & Int_IntMacRx) {
		/* Got a packet(s). */
#ifdef TC35815_NAPI
		ret = tc35815_rx(dev, limit);
#else
		tc35815_rx(dev);
		ret = 0;
#endif
		lp->lstats.rx_ints++;
	}
	if (status & Int_IntMacTx) {
		/* Transmit complete. */
		lp->lstats.tx_ints++;
		tc35815_txdone(dev);
		netif_wake_queue(dev);
		ret = 0;
	}
	return ret;
}

/*
 * The typical workload of the driver:
 * Handle the network interface interrupts.
 */
static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	struct tc35815_local *lp = netdev_priv(dev);
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;
#ifdef TC35815_NAPI
	u32 dmactl = tc_readl(&tr->DMA_Ctl);

	if (!(dmactl & DMA_IntMask)) {
		/* disable interrupts */
		tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
		if (napi_schedule_prep(&lp->napi))
			__napi_schedule(&lp->napi);
		else {
			printk(KERN_ERR "%s: interrupt taken in poll\n",
			       dev->name);
			BUG();
		}
		(void)tc_readl(&tr->Int_Src);	/* flush */
		return IRQ_HANDLED;
	}
	return IRQ_NONE;
#else
	int handled;
	u32 status;

	spin_lock(&lp->lock);
	status = tc_readl(&tr->Int_Src);
	tc_writel(status, &tr->Int_Src);	/* write to clear */
	handled = tc35815_do_interrupt(dev, status);
	(void)tc_readl(&tr->Int_Src);	/* flush */
	spin_unlock(&lp->lock);
	return IRQ_RETVAL(handled >= 0);
#endif /* TC35815_NAPI */
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void tc35815_poll_controller(struct net_device *dev)
{
	disable_irq(dev->irq);
	tc35815_interrupt(dev->irq, dev);
	enable_irq(dev->irq);
}
#endif

/* We have a good packet(s), get it/them out of the buffers. */
#ifdef TC35815_NAPI
static int
tc35815_rx(struct net_device *dev, int limit)
#else
static void
tc35815_rx(struct net_device *dev)
#endif
{
	struct tc35815_local *lp = netdev_priv(dev);
	unsigned int fdctl;
	int i;
	int buf_free_count = 0;
	int fd_free_count = 0;
#ifdef TC35815_NAPI
	int received = 0;
#endif

	while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
		int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
		int pkt_len = fdctl & FD_FDLength_MASK;
		int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
#ifdef DEBUG
		struct RxFD *next_rfd;
#endif
#if (RX_CTL_CMD & Rx_StripCRC) == 0
		pkt_len -= ETH_FCS_LEN;
#endif

		if (netif_msg_rx_status(lp))
			dump_rxfd(lp->rfd_cur);
		if (status & Rx_Good) {
			struct sk_buff *skb;
			unsigned char *data;
			int cur_bd;
#ifdef TC35815_USE_PACKEDBUFFER
			int offset;
#endif

#ifdef TC35815_NAPI
			if (--limit < 0)
				break;
#endif
#ifdef TC35815_USE_PACKEDBUFFER
			BUG_ON(bd_count > 2);
			skb = dev_alloc_skb(pkt_len + NET_IP_ALIGN);
			if (skb == NULL) {
				printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
				       dev->name);
				dev->stats.rx_dropped++;
				break;
			}
			skb_reserve(skb, NET_IP_ALIGN);

			data = skb_put(skb, pkt_len);

			/* copy from receive buffer */
			cur_bd = 0;
			offset = 0;
			while (offset < pkt_len && cur_bd < bd_count) {
				int len = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BDCtl) &
					BD_BuffLength_MASK;
				dma_addr_t dma = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BuffData);
				void *rxbuf = rxbuf_bus_to_virt(lp, dma);
				if (offset + len > pkt_len)
					len = pkt_len - offset;
#ifdef TC35815_DMA_SYNC_ONDEMAND
				pci_dma_sync_single_for_cpu(lp->pci_dev,
							    dma, len,
							    PCI_DMA_FROMDEVICE);
#endif
				memcpy(data + offset, rxbuf, len);
#ifdef TC35815_DMA_SYNC_ONDEMAND
				pci_dma_sync_single_for_device(lp->pci_dev,
							       dma, len,
							       PCI_DMA_FROMDEVICE);
#endif
				offset += len;
				cur_bd++;
			}
#else /* TC35815_USE_PACKEDBUFFER */
			BUG_ON(bd_count > 1);
			cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
				  & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
#ifdef DEBUG
			if (cur_bd >= RX_BUF_NUM) {
				printk("%s: invalid BDID.\n", dev->name);
				panic_queues(dev);
			}
			BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
			       (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
			if (!lp->rx_skbs[cur_bd].skb) {
				printk("%s: NULL skb.\n", dev->name);
				panic_queues(dev);
			}
#else
			BUG_ON(cur_bd >= RX_BUF_NUM);
#endif
			skb = lp->rx_skbs[cur_bd].skb;
			prefetch(skb->data);
			lp->rx_skbs[cur_bd].skb = NULL;
			pci_unmap_single(lp->pci_dev,
					 lp->rx_skbs[cur_bd].skb_dma,
					 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
			if (!HAVE_DMA_RXALIGN(lp) && NET_IP_ALIGN)
				memmove(skb->data, skb->data - NET_IP_ALIGN,
					pkt_len);
			data = skb_put(skb, pkt_len);
#endif /* TC35815_USE_PACKEDBUFFER */
			if (netif_msg_pktdata(lp))
				print_eth(data);
			skb->protocol = eth_type_trans(skb, dev);
#ifdef TC35815_NAPI
			netif_receive_skb(skb);
			received++;
#else
			netif_rx(skb);
#endif
			dev->stats.rx_packets++;
			dev->stats.rx_bytes += pkt_len;
		} else {
			dev->stats.rx_errors++;
			printk(KERN_DEBUG "%s: Rx error (status %x)\n",
			       dev->name, status & Rx_Stat_Mask);
			/* WORKAROUND: LongErr and CRCErr means Overflow. */
			if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
				status &= ~(Rx_LongErr|Rx_CRCErr);
				status |= Rx_Over;
			}
			if (status & Rx_LongErr)
				dev->stats.rx_length_errors++;
			if (status & Rx_Over)
				dev->stats.rx_fifo_errors++;
			if (status & Rx_CRCErr)
				dev->stats.rx_crc_errors++;
			if (status & Rx_Align)
				dev->stats.rx_frame_errors++;
		}

		if (bd_count > 0) {
			/* put Free Buffer back to controller */
			int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
			unsigned char id =
				(bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
#ifdef DEBUG
			if (id >= RX_BUF_NUM) {
				printk("%s: invalid BDID.\n", dev->name);
				panic_queues(dev);
			}
#else
			BUG_ON(id >= RX_BUF_NUM);
#endif
			/* free old buffers */
#ifdef TC35815_USE_PACKEDBUFFER
			while (lp->fbl_curid != id)
#else
			lp->fbl_count--;
			while (lp->fbl_count < RX_BUF_NUM)
#endif
			{
#ifdef TC35815_USE_PACKEDBUFFER
				unsigned char curid = lp->fbl_curid;
#else
				unsigned char curid =
					(id + 1 + lp->fbl_count) % RX_BUF_NUM;
#endif
				struct BDesc *bd = &lp->fbl_ptr->bd[curid];
#ifdef DEBUG
				bdctl = le32_to_cpu(bd->BDCtl);
				if (bdctl & BD_CownsBD) {
					printk("%s: Freeing invalid BD.\n",
					       dev->name);
					panic_queues(dev);
				}
#endif
				/* pass BD to controller */
#ifndef TC35815_USE_PACKEDBUFFER
				if (!lp->rx_skbs[curid].skb) {
					lp->rx_skbs[curid].skb =
						alloc_rxbuf_skb(dev,
								lp->pci_dev,
								&lp->rx_skbs[curid].skb_dma);
					if (!lp->rx_skbs[curid].skb)
						break; /* try on next reception */
					bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
				}
#endif /* TC35815_USE_PACKEDBUFFER */
				/* Note: BDLength was modified by chip. */
				bd->BDCtl = cpu_to_le32(BD_CownsBD |
							(curid << BD_RxBDID_SHIFT) |
							RX_BUF_SIZE);
#ifdef TC35815_USE_PACKEDBUFFER
				lp->fbl_curid = (curid + 1) % RX_BUF_NUM;
				if (netif_msg_rx_status(lp)) {
					printk("%s: Entering new FBD %d\n",
					       dev->name, lp->fbl_curid);
					dump_frfd(lp->fbl_ptr);
				}
#else
				lp->fbl_count++;
#endif
				buf_free_count++;
			}
		}

		/* put RxFD back to controller */
#ifdef DEBUG
		next_rfd = fd_bus_to_virt(lp,
					  le32_to_cpu(lp->rfd_cur->fd.FDNext));
		if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
			printk("%s: RxFD FDNext invalid.\n", dev->name);
			panic_queues(dev);
		}
#endif
		for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
			/* pass FD to controller */
#ifdef DEBUG
			lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
#else
			lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
#endif
			lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
			lp->rfd_cur++;
			fd_free_count++;
		}
		if (lp->rfd_cur > lp->rfd_limit)
			lp->rfd_cur = lp->rfd_base;
#ifdef DEBUG
		if (lp->rfd_cur != next_rfd)
			printk("rfd_cur = %p, next_rfd %p\n",
			       lp->rfd_cur, next_rfd);
#endif
	}

	/* re-enable BL/FDA Exhaust interrupts. */
	if (fd_free_count) {
		struct tc35815_regs __iomem *tr =
			(struct tc35815_regs __iomem *)dev->base_addr;
		u32 en, en_old = tc_readl(&tr->Int_En);
		en = en_old | Int_FDAExEn;
		if (buf_free_count)
			en |= Int_BLExEn;
		if (en != en_old)
			tc_writel(en, &tr->Int_En);
	}
#ifdef TC35815_NAPI
	return received;
#endif
}

#ifdef TC35815_NAPI
static int tc35815_poll(struct napi_struct *napi, int budget)
{
	struct tc35815_local *lp = container_of(napi, struct tc35815_local, napi);
	struct net_device *dev = lp->dev;
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;
	int received = 0, handled;
	u32 status;

	spin_lock(&lp->lock);
	status = tc_readl(&tr->Int_Src);
	do {
		tc_writel(status, &tr->Int_Src);	/* write to clear */

		handled = tc35815_do_interrupt(dev, status, budget - received);
		if (handled >= 0) {
			received += handled;
			if (received >= budget)
				break;
		}
		status = tc_readl(&tr->Int_Src);
	} while (status);
	spin_unlock(&lp->lock);

	if (received < budget) {
		napi_complete(napi);
		/* enable interrupts */
		tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
	}
	return received;
}
#endif

#ifdef NO_CHECK_CARRIER
#define TX_STA_ERR	(Tx_ExColl|Tx_Under|Tx_Defer|Tx_LateColl|Tx_TxPar|Tx_SQErr)
#else
#define TX_STA_ERR	(Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
#endif

static void
tc35815_check_tx_stat(struct net_device *dev, int status)
{
	struct tc35815_local *lp = netdev_priv(dev);
	const char *msg = NULL;

	/* count collisions */
	if (status & Tx_ExColl)
		dev->stats.collisions += 16;
	if (status & Tx_TxColl_MASK)
		dev->stats.collisions += status & Tx_TxColl_MASK;

#ifndef NO_CHECK_CARRIER
	/* TX4939 does not have NCarr */
	if (lp->chiptype == TC35815_TX4939)
		status &= ~Tx_NCarr;
#ifdef WORKAROUND_LOSTCAR
	/* WORKAROUND: ignore LostCrS in full duplex operation */
	if (!lp->link || lp->duplex == DUPLEX_FULL)
		status &= ~Tx_NCarr;
#endif
#endif

	if (!(status & TX_STA_ERR)) {
		/* no error. */
		dev->stats.tx_packets++;
		return;
	}

	dev->stats.tx_errors++;
	if (status & Tx_ExColl) {
		dev->stats.tx_aborted_errors++;
		msg = "Excessive Collision.";
	}
	if (status & Tx_Under) {
		dev->stats.tx_fifo_errors++;
		msg = "Tx FIFO Underrun.";
		if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
			lp->lstats.tx_underrun++;
			if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
				struct tc35815_regs __iomem *tr =
					(struct tc35815_regs __iomem *)dev->base_addr;
				tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
				msg = "Tx FIFO Underrun.Change Tx threshold to max.";
			}
		}
	}
	if (status & Tx_Defer) {
		dev->stats.tx_fifo_errors++;
		msg = "Excessive Deferral.";
	}
#ifndef NO_CHECK_CARRIER
	if (status & Tx_NCarr) {
		dev->stats.tx_carrier_errors++;
		msg = "Lost Carrier Sense.";
	}
#endif
	if (status & Tx_LateColl) {
		dev->stats.tx_aborted_errors++;
		msg = "Late Collision.";
	}
	if (status & Tx_TxPar) {
		dev->stats.tx_fifo_errors++;
		msg = "Transmit Parity Error.";
	}
	if (status & Tx_SQErr) {
		dev->stats.tx_heartbeat_errors++;
		msg = "Signal Quality Error.";
	}
	if (msg && netif_msg_tx_err(lp))
		printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
}

/* This handles TX complete events posted by the device
 * via interrupts.
 */
static void
tc35815_txdone(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	struct TxFD *txfd;
	unsigned int fdctl;

	txfd = &lp->tfd_base[lp->tfd_end];
	while (lp->tfd_start != lp->tfd_end &&
	       !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
		int status = le32_to_cpu(txfd->fd.FDStat);
		struct sk_buff *skb;
		unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
		u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);

		if (netif_msg_tx_done(lp)) {
			printk("%s: complete TxFD.\n", dev->name);
			dump_txfd(txfd);
		}
		tc35815_check_tx_stat(dev, status);

		skb = fdsystem != 0xffffffff ?
			lp->tx_skbs[fdsystem].skb : NULL;
#ifdef DEBUG
		if (lp->tx_skbs[lp->tfd_end].skb != skb) {
			printk("%s: tx_skbs mismatch.\n", dev->name);
			panic_queues(dev);
		}
#else
		BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
#endif
		if (skb) {
			dev->stats.tx_bytes += skb->len;
			pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
			lp->tx_skbs[lp->tfd_end].skb = NULL;
			lp->tx_skbs[lp->tfd_end].skb_dma = 0;
#ifdef TC35815_NAPI
			dev_kfree_skb_any(skb);
#else
			dev_kfree_skb_irq(skb);
#endif
		}
		txfd->fd.FDSystem = cpu_to_le32(0xffffffff);

		lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
		txfd = &lp->tfd_base[lp->tfd_end];
#ifdef DEBUG
		if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
			printk("%s: TxFD FDNext invalid.\n", dev->name);
			panic_queues(dev);
		}
#endif
		if (fdnext & FD_Next_EOL) {
			/* DMA Transmitter has been stopping... */
			if (lp->tfd_end != lp->tfd_start) {
				struct tc35815_regs __iomem *tr =
					(struct tc35815_regs __iomem *)dev->base_addr;
				int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
				struct TxFD *txhead = &lp->tfd_base[head];
				int qlen = (lp->tfd_start + TX_FD_NUM
					    - lp->tfd_end) % TX_FD_NUM;

#ifdef DEBUG
				if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
					printk("%s: TxFD FDCtl invalid.\n", dev->name);
					panic_queues(dev);
				}
#endif
				/* log max queue length */
				if (lp->lstats.max_tx_qlen < qlen)
					lp->lstats.max_tx_qlen = qlen;


				/* start DMA Transmitter again */
				txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
#ifdef GATHER_TXINT
				txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
#endif
				if (netif_msg_tx_queued(lp)) {
					printk("%s: start TxFD on queue.\n",
					       dev->name);
					dump_txfd(txfd);
				}
				tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
			}
			break;
		}
	}

	/* If we had stopped the queue due to a "tx full"
	 * condition, and space has now been made available,
	 * wake up the queue.
	 */
	if (netif_queue_stopped(dev) && !tc35815_tx_full(dev))
		netif_wake_queue(dev);
}

/* The inverse routine to tc35815_open(). */
static int
tc35815_close(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);

	netif_stop_queue(dev);
#ifdef TC35815_NAPI
	napi_disable(&lp->napi);
#endif
	if (lp->phy_dev)
		phy_stop(lp->phy_dev);
	cancel_work_sync(&lp->restart_work);

	/* Flush the Tx and disable Rx here. */
	tc35815_chip_reset(dev);
	free_irq(dev->irq, dev);

	tc35815_free_queues(dev);

	return 0;

}

/*
 * Get the current statistics.
 * This may be called with the card open or closed.
 */
static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
{
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;
	if (netif_running(dev))
		/* Update the statistics from the device registers. */
		dev->stats.rx_missed_errors = tc_readl(&tr->Miss_Cnt);

	return &dev->stats;
}

static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
{
	struct tc35815_local *lp = netdev_priv(dev);
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;
	int cam_index = index * 6;
	u32 cam_data;
	u32 saved_addr;

	saved_addr = tc_readl(&tr->CAM_Adr);

	if (netif_msg_hw(lp))
		printk(KERN_DEBUG "%s: CAM %d: %pM\n",
			dev->name, index, addr);
	if (index & 1) {
		/* read modify write */
		tc_writel(cam_index - 2, &tr->CAM_Adr);
		cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
		cam_data |= addr[0] << 8 | addr[1];
		tc_writel(cam_data, &tr->CAM_Data);
		/* write whole word */
		tc_writel(cam_index + 2, &tr->CAM_Adr);
		cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
		tc_writel(cam_data, &tr->CAM_Data);
	} else {
		/* write whole word */
		tc_writel(cam_index, &tr->CAM_Adr);
		cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
		tc_writel(cam_data, &tr->CAM_Data);
		/* read modify write */
		tc_writel(cam_index + 4, &tr->CAM_Adr);
		cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
		cam_data |= addr[4] << 24 | (addr[5] << 16);
		tc_writel(cam_data, &tr->CAM_Data);
	}

	tc_writel(saved_addr, &tr->CAM_Adr);
}


/*
 * Set or clear the multicast filter for this adaptor.
 * num_addrs == -1	Promiscuous mode, receive all packets
 * num_addrs == 0	Normal mode, clear multicast list
 * num_addrs > 0	Multicast mode, receive normal and MC packets,
 *			and do best-effort filtering.
 */
static void
tc35815_set_multicast_list(struct net_device *dev)
{
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;

	if (dev->flags & IFF_PROMISC) {
#ifdef WORKAROUND_100HALF_PROMISC
		/* With some (all?) 100MHalf HUB, controller will hang
		 * if we enabled promiscuous mode before linkup... */
		struct tc35815_local *lp = netdev_priv(dev);

		if (!lp->link)
			return;
#endif
		/* Enable promiscuous mode */
		tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
	} else if ((dev->flags & IFF_ALLMULTI) ||
		  dev->mc_count > CAM_ENTRY_MAX - 3) {
		/* CAM 0, 1, 20 are reserved. */
		/* Disable promiscuous mode, use normal mode. */
		tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
	} else if (dev->mc_count) {
		struct dev_mc_list *cur_addr = dev->mc_list;
		int i;
		int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);

		tc_writel(0, &tr->CAM_Ctl);
		/* Walk the address list, and load the filter */
		for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
			if (!cur_addr)
				break;
			/* entry 0,1 is reserved. */
			tc35815_set_cam_entry(dev, i + 2, cur_addr->dmi_addr);
			ena_bits |= CAM_Ena_Bit(i + 2);
		}
		tc_writel(ena_bits, &tr->CAM_Ena);
		tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
	} else {
		tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
		tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
	}
}

static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
	struct tc35815_local *lp = netdev_priv(dev);
	strcpy(info->driver, MODNAME);
	strcpy(info->version, DRV_VERSION);
	strcpy(info->bus_info, pci_name(lp->pci_dev));
}

static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct tc35815_local *lp = netdev_priv(dev);

	if (!lp->phy_dev)
		return -ENODEV;
	return phy_ethtool_gset(lp->phy_dev, cmd);
}

static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct tc35815_local *lp = netdev_priv(dev);

	if (!lp->phy_dev)
		return -ENODEV;
	return phy_ethtool_sset(lp->phy_dev, cmd);
}

static u32 tc35815_get_msglevel(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	return lp->msg_enable;
}

static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
{
	struct tc35815_local *lp = netdev_priv(dev);
	lp->msg_enable = datum;
}

static int tc35815_get_sset_count(struct net_device *dev, int sset)
{
	struct tc35815_local *lp = netdev_priv(dev);

	switch (sset) {
	case ETH_SS_STATS:
		return sizeof(lp->lstats) / sizeof(int);
	default:
		return -EOPNOTSUPP;
	}
}

static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
{
	struct tc35815_local *lp = netdev_priv(dev);
	data[0] = lp->lstats.max_tx_qlen;
	data[1] = lp->lstats.tx_ints;
	data[2] = lp->lstats.rx_ints;
	data[3] = lp->lstats.tx_underrun;
}

static struct {
	const char str[ETH_GSTRING_LEN];
} ethtool_stats_keys[] = {
	{ "max_tx_qlen" },
	{ "tx_ints" },
	{ "rx_ints" },
	{ "tx_underrun" },
};

static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
{
	memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
}

static const struct ethtool_ops tc35815_ethtool_ops = {
	.get_drvinfo		= tc35815_get_drvinfo,
	.get_settings		= tc35815_get_settings,
	.set_settings		= tc35815_set_settings,
	.get_link		= ethtool_op_get_link,
	.get_msglevel		= tc35815_get_msglevel,
	.set_msglevel		= tc35815_set_msglevel,
	.get_strings		= tc35815_get_strings,
	.get_sset_count		= tc35815_get_sset_count,
	.get_ethtool_stats	= tc35815_get_ethtool_stats,
};

static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	struct tc35815_local *lp = netdev_priv(dev);

	if (!netif_running(dev))
		return -EINVAL;
	if (!lp->phy_dev)
		return -ENODEV;
	return phy_mii_ioctl(lp->phy_dev, if_mii(rq), cmd);
}

static void tc35815_chip_reset(struct net_device *dev)
{
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;
	int i;
	/* reset the controller */
	tc_writel(MAC_Reset, &tr->MAC_Ctl);
	udelay(4); /* 3200ns */
	i = 0;
	while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
		if (i++ > 100) {
			printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
			break;
		}
		mdelay(1);
	}
	tc_writel(0, &tr->MAC_Ctl);

	/* initialize registers to default value */
	tc_writel(0, &tr->DMA_Ctl);
	tc_writel(0, &tr->TxThrsh);
	tc_writel(0, &tr->TxPollCtr);
	tc_writel(0, &tr->RxFragSize);
	tc_writel(0, &tr->Int_En);
	tc_writel(0, &tr->FDA_Bas);
	tc_writel(0, &tr->FDA_Lim);
	tc_writel(0xffffffff, &tr->Int_Src);	/* Write 1 to clear */
	tc_writel(0, &tr->CAM_Ctl);
	tc_writel(0, &tr->Tx_Ctl);
	tc_writel(0, &tr->Rx_Ctl);
	tc_writel(0, &tr->CAM_Ena);
	(void)tc_readl(&tr->Miss_Cnt);	/* Read to clear */

	/* initialize internal SRAM */
	tc_writel(DMA_TestMode, &tr->DMA_Ctl);
	for (i = 0; i < 0x1000; i += 4) {
		tc_writel(i, &tr->CAM_Adr);
		tc_writel(0, &tr->CAM_Data);
	}
	tc_writel(0, &tr->DMA_Ctl);
}

static void tc35815_chip_init(struct net_device *dev)
{
	struct tc35815_local *lp = netdev_priv(dev);
	struct tc35815_regs __iomem *tr =
		(struct tc35815_regs __iomem *)dev->base_addr;
	unsigned long txctl = TX_CTL_CMD;

	/* load station address to CAM */
	tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);

	/* Enable CAM (broadcast and unicast) */
	tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
	tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);

	/* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
	if (HAVE_DMA_RXALIGN(lp))
		tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
	else
		tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
#ifdef TC35815_USE_PACKEDBUFFER
	tc_writel(RxFrag_EnPack | ETH_ZLEN, &tr->RxFragSize);	/* Packing */
#else
	tc_writel(ETH_ZLEN, &tr->RxFragSize);
#endif
	tc_writel(0, &tr->TxPollCtr);	/* Batch mode */
	tc_writel(TX_THRESHOLD, &tr->TxThrsh);
	tc_writel(INT_EN_CMD, &tr->Int_En);

	/* set queues */
	tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
	tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
		  &tr->FDA_Lim);
	/*
	 * Activation method:
	 * First, enable the MAC Transmitter and the DMA Receive circuits.
	 * Then enable the DMA Transmitter and the MAC Receive circuits.
	 */
	tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr);	/* start DMA receiver */
	tc_writel(RX_CTL_CMD, &tr->Rx_Ctl);	/* start MAC receiver */

	/* start MAC transmitter */
#ifndef NO_CHECK_CARRIER
	/* TX4939 does not have EnLCarr */
	if (lp->chiptype == TC35815_TX4939)
		txctl &= ~Tx_EnLCarr;
#ifdef WORKAROUND_LOSTCAR
	/* WORKAROUND: ignore LostCrS in full duplex operation */
	if (!lp->phy_dev || !lp->link || lp->duplex == DUPLEX_FULL)
		txctl &= ~Tx_EnLCarr;
#endif
#endif /* !NO_CHECK_CARRIER */
#ifdef GATHER_TXINT
	txctl &= ~Tx_EnComp;	/* disable global tx completion int. */
#endif
	tc_writel(txctl, &tr->Tx_Ctl);
}

#ifdef CONFIG_PM
static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct tc35815_local *lp = netdev_priv(dev);
	unsigned long flags;

	pci_save_state(pdev);
	if (!netif_running(dev))
		return 0;
	netif_device_detach(dev);
	if (lp->phy_dev)
		phy_stop(lp->phy_dev);
	spin_lock_irqsave(&lp->lock, flags);
	tc35815_chip_reset(dev);
	spin_unlock_irqrestore(&lp->lock, flags);
	pci_set_power_state(pdev, PCI_D3hot);
	return 0;
}

static int tc35815_resume(struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct tc35815_local *lp = netdev_priv(dev);

	pci_restore_state(pdev);
	if (!netif_running(dev))
		return 0;
	pci_set_power_state(pdev, PCI_D0);
	tc35815_restart(dev);
	netif_carrier_off(dev);
	if (lp->phy_dev)
		phy_start(lp->phy_dev);
	netif_device_attach(dev);
	return 0;
}
#endif /* CONFIG_PM */

static struct pci_driver tc35815_pci_driver = {
	.name		= MODNAME,
	.id_table	= tc35815_pci_tbl,
	.probe		= tc35815_init_one,
	.remove		= __devexit_p(tc35815_remove_one),
#ifdef CONFIG_PM
	.suspend	= tc35815_suspend,
	.resume		= tc35815_resume,
#endif
};

module_param_named(speed, options.speed, int, 0);
MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
module_param_named(duplex, options.duplex, int, 0);
MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");

static int __init tc35815_init_module(void)
{
	return pci_register_driver(&tc35815_pci_driver);
}

static void __exit tc35815_cleanup_module(void)
{
	pci_unregister_driver(&tc35815_pci_driver);
}

module_init(tc35815_init_module);
module_exit(tc35815_cleanup_module);

MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
MODULE_LICENSE("GPL");