aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/atmel.c
blob: dfc24016ba81735a721b169d561e4993dcf3bdb1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
/*** -*- linux-c -*- **********************************************************

     Driver for Atmel at76c502 at76c504 and at76c506 wireless cards.

        Copyright 2000-2001 ATMEL Corporation.
        Copyright 2003-2004 Simon Kelley.

    This code was developed from version 2.1.1 of the Atmel drivers,
    released by Atmel corp. under the GPL in December 2002. It also
    includes code from the Linux aironet drivers (C) Benjamin Reed,
    and the Linux PCMCIA package, (C) David Hinds and the Linux wireless
    extensions, (C) Jean Tourrilhes.

    The firmware module for reading the MAC address of the card comes from
    net.russotto.AtmelMACFW, written by Matthew T. Russotto and copyright
    by him. net.russotto.AtmelMACFW is used under the GPL license version 2.
    This file contains the module in binary form and, under the terms
    of the GPL, in source form. The source is located at the end of the file.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This software 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 Atmel wireless lan drivers; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    For all queries about this code, please contact the current author,
    Simon Kelley <simon@thekelleys.org.uk> and not Atmel Corporation.

    Credit is due to HP UK and Cambridge Online Systems Ltd for supplying
    hardware used during development of this driver.

******************************************************************************/

#include <linux/config.h>
#include <linux/init.h>

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/timer.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/ioport.h>
#include <linux/fcntl.h>
#include <linux/delay.h>
#include <linux/wireless.h>
#include <net/iw_handler.h>
#include <linux/byteorder/generic.h>
#include <linux/crc32.h>
#include <linux/proc_fs.h>
#include <linux/device.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include <net/ieee80211.h>
#include "atmel.h"

#define DRIVER_MAJOR 0
#define DRIVER_MINOR 98

MODULE_AUTHOR("Simon Kelley");
MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("Atmel at76c50x wireless cards");

/* The name of the firmware file to be loaded
   over-rides any automatic selection */
static char *firmware = NULL;
module_param(firmware, charp, 0);

/* table of firmware file names */
static struct {
	AtmelFWType fw_type;
	const char *fw_file;
	const char *fw_file_ext;
} fw_table[] = {
	{ ATMEL_FW_TYPE_502,      "atmel_at76c502",      "bin" },
	{ ATMEL_FW_TYPE_502D,     "atmel_at76c502d",     "bin" },
	{ ATMEL_FW_TYPE_502E,     "atmel_at76c502e",     "bin" },
	{ ATMEL_FW_TYPE_502_3COM, "atmel_at76c502_3com", "bin" },
	{ ATMEL_FW_TYPE_504,      "atmel_at76c504",      "bin" },
	{ ATMEL_FW_TYPE_504_2958, "atmel_at76c504_2958", "bin" },
	{ ATMEL_FW_TYPE_504A_2958,"atmel_at76c504a_2958","bin" },
	{ ATMEL_FW_TYPE_506,      "atmel_at76c506",      "bin" },
	{ ATMEL_FW_TYPE_NONE,      NULL,                  NULL }
};

#define MAX_SSID_LENGTH 32
#define MGMT_JIFFIES (256 * HZ / 100)

#define MAX_BSS_ENTRIES	64

/* registers */
#define GCR  0x00    //      (SIR0)  General Configuration Register
#define BSR  0x02    //      (SIR1)  Bank Switching Select Register
#define AR   0x04
#define DR   0x08
#define MR1  0x12    //      Mirror Register 1
#define MR2  0x14    //      Mirror Register 2
#define MR3  0x16    //      Mirror Register 3
#define MR4  0x18    //      Mirror Register 4

#define GPR1                            0x0c
#define GPR2                            0x0e
#define GPR3                            0x10
//
// Constants for the GCR register.
//
#define GCR_REMAP     0x0400          // Remap internal SRAM to 0
#define GCR_SWRES     0x0080          // BIU reset (ARM and PAI are NOT reset)
#define GCR_CORES     0x0060          // Core Reset (ARM and PAI are reset)
#define GCR_ENINT     0x0002          // Enable Interrupts
#define GCR_ACKINT    0x0008          // Acknowledge Interrupts

#define BSS_SRAM      0x0200          // AMBA module selection --> SRAM
#define BSS_IRAM      0x0100          // AMBA module selection --> IRAM
//
// Constants for the MR registers.
//
#define MAC_INIT_COMPLETE       0x0001        // MAC init has been completed
#define MAC_BOOT_COMPLETE       0x0010        // MAC boot has been completed
#define MAC_INIT_OK             0x0002        // MAC boot has been completed

#define C80211_SUBTYPE_MGMT_ASS_REQUEST                 0x00
#define C80211_SUBTYPE_MGMT_ASS_RESPONSE                0x10
#define C80211_SUBTYPE_MGMT_REASS_REQUEST               0x20
#define C80211_SUBTYPE_MGMT_REASS_RESPONSE              0x30
#define C80211_SUBTYPE_MGMT_ProbeRequest                0x40
#define C80211_SUBTYPE_MGMT_ProbeResponse               0x50
#define C80211_SUBTYPE_MGMT_BEACON                      0x80
#define C80211_SUBTYPE_MGMT_ATIM                        0x90
#define C80211_SUBTYPE_MGMT_DISASSOSIATION              0xA0
#define C80211_SUBTYPE_MGMT_Authentication              0xB0
#define C80211_SUBTYPE_MGMT_Deauthentication    0xC0

#define C80211_MGMT_AAN_OPENSYSTEM              0x0000
#define C80211_MGMT_AAN_SHAREDKEY               0x0001

#define C80211_MGMT_CAPABILITY_ESS              0x0001  // see 802.11 p.58
#define C80211_MGMT_CAPABILITY_IBSS             0x0002  //      - " -
#define C80211_MGMT_CAPABILITY_CFPollable       0x0004  //      - " -
#define C80211_MGMT_CAPABILITY_CFPollRequest    0x0008  //      - " -
#define C80211_MGMT_CAPABILITY_Privacy          0x0010  //      - " -

#define C80211_MGMT_SC_Success                  0
#define C80211_MGMT_SC_Unspecified              1
#define C80211_MGMT_SC_SupportCapabilities      10
#define C80211_MGMT_SC_ReassDenied              11
#define C80211_MGMT_SC_AssDenied                12
#define C80211_MGMT_SC_AuthAlgNotSupported      13
#define C80211_MGMT_SC_AuthTransSeqNumError     14
#define C80211_MGMT_SC_AuthRejectChallenge      15
#define C80211_MGMT_SC_AuthRejectTimeout        16
#define C80211_MGMT_SC_AssDeniedHandleAP        17
#define C80211_MGMT_SC_AssDeniedBSSRate         18

#define C80211_MGMT_ElementID_SSID              0
#define C80211_MGMT_ElementID_SupportedRates    1
#define C80211_MGMT_ElementID_ChallengeText     16
#define C80211_MGMT_CAPABILITY_ShortPreamble    0x0020

#define MIB_MAX_DATA_BYTES    212
#define MIB_HEADER_SIZE       4    /* first four fields */

struct get_set_mib {
        u8 type;
        u8 size;
        u8 index;
        u8 reserved;
        u8 data[MIB_MAX_DATA_BYTES];
};

struct rx_desc {
        u32          Next;
        u16          MsduPos;
        u16          MsduSize;

        u8           State;
        u8           Status;
        u8           Rate;
        u8           Rssi;
        u8           LinkQuality;
        u8           PreambleType;
        u16          Duration;
        u32          RxTime;
};

#define RX_DESC_FLAG_VALID       0x80
#define RX_DESC_FLAG_CONSUMED    0x40
#define RX_DESC_FLAG_IDLE        0x00

#define RX_STATUS_SUCCESS        0x00

#define RX_DESC_MSDU_POS_OFFSET      4
#define RX_DESC_MSDU_SIZE_OFFSET     6
#define RX_DESC_FLAGS_OFFSET         8
#define RX_DESC_STATUS_OFFSET        9
#define RX_DESC_RSSI_OFFSET          11
#define RX_DESC_LINK_QUALITY_OFFSET  12
#define RX_DESC_PREAMBLE_TYPE_OFFSET 13
#define RX_DESC_DURATION_OFFSET      14
#define RX_DESC_RX_TIME_OFFSET       16

struct tx_desc {
	u32       NextDescriptor;
	u16       TxStartOfFrame;
	u16       TxLength;

	u8        TxState;
	u8        TxStatus;
	u8        RetryCount;

	u8        TxRate;

	u8        KeyIndex;
	u8        ChiperType;
	u8        ChipreLength;
        u8        Reserved1;

	u8        Reserved;
	u8        PacketType;
	u16       HostTxLength;
};

#define TX_DESC_NEXT_OFFSET          0
#define TX_DESC_POS_OFFSET           4
#define TX_DESC_SIZE_OFFSET          6
#define TX_DESC_FLAGS_OFFSET         8
#define TX_DESC_STATUS_OFFSET        9
#define TX_DESC_RETRY_OFFSET         10
#define TX_DESC_RATE_OFFSET          11
#define TX_DESC_KEY_INDEX_OFFSET     12
#define TX_DESC_CIPHER_TYPE_OFFSET   13
#define TX_DESC_CIPHER_LENGTH_OFFSET 14
#define TX_DESC_PACKET_TYPE_OFFSET   17
#define TX_DESC_HOST_LENGTH_OFFSET   18

///////////////////////////////////////////////////////
// Host-MAC interface
///////////////////////////////////////////////////////

#define TX_STATUS_SUCCESS       0x00

#define TX_FIRM_OWN             0x80
#define TX_DONE                 0x40

#define TX_ERROR                0x01

#define TX_PACKET_TYPE_DATA     0x01
#define TX_PACKET_TYPE_MGMT     0x02

#define ISR_EMPTY               0x00        // no bits set in ISR
#define ISR_TxCOMPLETE          0x01        // packet transmitted
#define ISR_RxCOMPLETE          0x02        // packet received
#define ISR_RxFRAMELOST         0x04        // Rx Frame lost
#define ISR_FATAL_ERROR         0x08        // Fatal error
#define ISR_COMMAND_COMPLETE    0x10        // command completed
#define ISR_OUT_OF_RANGE        0x20        // command completed
#define ISR_IBSS_MERGE          0x40        // (4.1.2.30): IBSS merge
#define ISR_GENERIC_IRQ         0x80

#define Local_Mib_Type          0x01
#define Mac_Address_Mib_Type    0x02
#define Mac_Mib_Type            0x03
#define Statistics_Mib_Type     0x04
#define Mac_Mgmt_Mib_Type       0x05
#define Mac_Wep_Mib_Type        0x06
#define Phy_Mib_Type            0x07
#define Multi_Domain_MIB        0x08

#define MAC_MGMT_MIB_CUR_BSSID_POS            14
#define MAC_MIB_FRAG_THRESHOLD_POS            8
#define MAC_MIB_RTS_THRESHOLD_POS             10
#define MAC_MIB_SHORT_RETRY_POS               16
#define MAC_MIB_LONG_RETRY_POS                17
#define MAC_MIB_SHORT_RETRY_LIMIT_POS         16
#define MAC_MGMT_MIB_BEACON_PER_POS           0
#define MAC_MGMT_MIB_STATION_ID_POS           6
#define MAC_MGMT_MIB_CUR_PRIVACY_POS          11
#define MAC_MGMT_MIB_CUR_BSSID_POS            14
#define MAC_MGMT_MIB_PS_MODE_POS              53
#define MAC_MGMT_MIB_LISTEN_INTERVAL_POS      54
#define MAC_MGMT_MIB_MULTI_DOMAIN_IMPLEMENTED 56
#define MAC_MGMT_MIB_MULTI_DOMAIN_ENABLED     57
#define PHY_MIB_CHANNEL_POS                   14
#define PHY_MIB_RATE_SET_POS                  20
#define PHY_MIB_REG_DOMAIN_POS                26
#define LOCAL_MIB_AUTO_TX_RATE_POS            3
#define LOCAL_MIB_SSID_SIZE                   5
#define LOCAL_MIB_TX_PROMISCUOUS_POS          6
#define LOCAL_MIB_TX_MGMT_RATE_POS            7
#define LOCAL_MIB_TX_CONTROL_RATE_POS         8
#define LOCAL_MIB_PREAMBLE_TYPE               9
#define MAC_ADDR_MIB_MAC_ADDR_POS             0

#define         CMD_Set_MIB_Vars              0x01
#define         CMD_Get_MIB_Vars              0x02
#define         CMD_Scan                      0x03
#define         CMD_Join                      0x04
#define         CMD_Start                     0x05
#define         CMD_EnableRadio               0x06
#define         CMD_DisableRadio              0x07
#define         CMD_SiteSurvey                0x0B

#define         CMD_STATUS_IDLE                   0x00
#define         CMD_STATUS_COMPLETE               0x01
#define         CMD_STATUS_UNKNOWN                0x02
#define         CMD_STATUS_INVALID_PARAMETER      0x03
#define         CMD_STATUS_FUNCTION_NOT_SUPPORTED 0x04
#define         CMD_STATUS_TIME_OUT               0x07
#define         CMD_STATUS_IN_PROGRESS            0x08
#define         CMD_STATUS_REJECTED_RADIO_OFF     0x09
#define         CMD_STATUS_HOST_ERROR             0xFF
#define         CMD_STATUS_BUSY                   0xFE

#define CMD_BLOCK_COMMAND_OFFSET        0
#define CMD_BLOCK_STATUS_OFFSET         1
#define CMD_BLOCK_PARAMETERS_OFFSET     4

#define SCAN_OPTIONS_SITE_SURVEY        0x80

#define MGMT_FRAME_BODY_OFFSET		24
#define MAX_AUTHENTICATION_RETRIES	3
#define MAX_ASSOCIATION_RETRIES		3

#define AUTHENTICATION_RESPONSE_TIME_OUT  1000

#define MAX_WIRELESS_BODY  2316 /* mtu is 2312, CRC is 4 */
#define LOOP_RETRY_LIMIT   500000

#define ACTIVE_MODE	1
#define PS_MODE		2

#define MAX_ENCRYPTION_KEYS 4
#define MAX_ENCRYPTION_KEY_SIZE 40

///////////////////////////////////////////////////////////////////////////
// 802.11 related definitions
///////////////////////////////////////////////////////////////////////////

//
// Regulatory Domains
//

#define REG_DOMAIN_FCC		0x10	//Channels	1-11	USA
#define REG_DOMAIN_DOC		0x20	//Channel	1-11	Canada
#define REG_DOMAIN_ETSI		0x30	//Channel	1-13	Europe (ex Spain/France)
#define REG_DOMAIN_SPAIN	0x31	//Channel	10-11	Spain
#define REG_DOMAIN_FRANCE	0x32	//Channel	10-13	France
#define REG_DOMAIN_MKK		0x40	//Channel	14	Japan
#define REG_DOMAIN_MKK1		0x41	//Channel	1-14	Japan(MKK1)
#define REG_DOMAIN_ISRAEL	0x50	//Channel	3-9	ISRAEL

#define BSS_TYPE_AD_HOC		1
#define BSS_TYPE_INFRASTRUCTURE 2

#define SCAN_TYPE_ACTIVE	0
#define SCAN_TYPE_PASSIVE	1

#define LONG_PREAMBLE		0
#define SHORT_PREAMBLE		1
#define AUTO_PREAMBLE		2

#define DATA_FRAME_WS_HEADER_SIZE   30

/* promiscuous mode control */
#define PROM_MODE_OFF			0x0
#define PROM_MODE_UNKNOWN		0x1
#define PROM_MODE_CRC_FAILED		0x2
#define PROM_MODE_DUPLICATED		0x4
#define PROM_MODE_MGMT			0x8
#define PROM_MODE_CTRL			0x10
#define PROM_MODE_BAD_PROTOCOL		0x20

#define IFACE_INT_STATUS_OFFSET		0
#define IFACE_INT_MASK_OFFSET		1
#define IFACE_LOCKOUT_HOST_OFFSET	2
#define IFACE_LOCKOUT_MAC_OFFSET	3
#define IFACE_FUNC_CTRL_OFFSET		28
#define IFACE_MAC_STAT_OFFSET		30
#define IFACE_GENERIC_INT_TYPE_OFFSET	32

#define CIPHER_SUITE_NONE     0
#define CIPHER_SUITE_WEP_64   1
#define CIPHER_SUITE_TKIP     2
#define CIPHER_SUITE_AES      3
#define CIPHER_SUITE_CCX      4
#define CIPHER_SUITE_WEP_128  5

//
// IFACE MACROS & definitions
//
//

// FuncCtrl field:
//
#define FUNC_CTRL_TxENABLE		0x10
#define FUNC_CTRL_RxENABLE		0x20
#define FUNC_CTRL_INIT_COMPLETE		0x01

/* A stub firmware image which reads the MAC address from NVRAM on the card.
   For copyright information and source see the end of this file. */
static u8 mac_reader[] = {
	0x06,0x00,0x00,0xea,0x04,0x00,0x00,0xea,0x03,0x00,0x00,0xea,0x02,0x00,0x00,0xea,
	0x01,0x00,0x00,0xea,0x00,0x00,0x00,0xea,0xff,0xff,0xff,0xea,0xfe,0xff,0xff,0xea,
	0xd3,0x00,0xa0,0xe3,0x00,0xf0,0x21,0xe1,0x0e,0x04,0xa0,0xe3,0x00,0x10,0xa0,0xe3,
	0x81,0x11,0xa0,0xe1,0x00,0x10,0x81,0xe3,0x00,0x10,0x80,0xe5,0x1c,0x10,0x90,0xe5,
	0x10,0x10,0xc1,0xe3,0x1c,0x10,0x80,0xe5,0x01,0x10,0xa0,0xe3,0x08,0x10,0x80,0xe5,
	0x02,0x03,0xa0,0xe3,0x00,0x10,0xa0,0xe3,0xb0,0x10,0xc0,0xe1,0xb4,0x10,0xc0,0xe1,
	0xb8,0x10,0xc0,0xe1,0xbc,0x10,0xc0,0xe1,0x56,0xdc,0xa0,0xe3,0x21,0x00,0x00,0xeb,
	0x0a,0x00,0xa0,0xe3,0x1a,0x00,0x00,0xeb,0x10,0x00,0x00,0xeb,0x07,0x00,0x00,0xeb,
	0x02,0x03,0xa0,0xe3,0x02,0x14,0xa0,0xe3,0xb4,0x10,0xc0,0xe1,0x4c,0x10,0x9f,0xe5,
	0xbc,0x10,0xc0,0xe1,0x10,0x10,0xa0,0xe3,0xb8,0x10,0xc0,0xe1,0xfe,0xff,0xff,0xea,
	0x00,0x40,0x2d,0xe9,0x00,0x20,0xa0,0xe3,0x02,0x3c,0xa0,0xe3,0x00,0x10,0xa0,0xe3,
	0x28,0x00,0x9f,0xe5,0x37,0x00,0x00,0xeb,0x00,0x40,0xbd,0xe8,0x1e,0xff,0x2f,0xe1,
	0x00,0x40,0x2d,0xe9,0x12,0x2e,0xa0,0xe3,0x06,0x30,0xa0,0xe3,0x00,0x10,0xa0,0xe3,
	0x02,0x04,0xa0,0xe3,0x2f,0x00,0x00,0xeb,0x00,0x40,0xbd,0xe8,0x1e,0xff,0x2f,0xe1,
	0x00,0x02,0x00,0x02,0x80,0x01,0x90,0xe0,0x01,0x00,0x00,0x0a,0x01,0x00,0x50,0xe2,
	0xfc,0xff,0xff,0xea,0x1e,0xff,0x2f,0xe1,0x80,0x10,0xa0,0xe3,0xf3,0x06,0xa0,0xe3,
	0x00,0x10,0x80,0xe5,0x00,0x10,0xa0,0xe3,0x00,0x10,0x80,0xe5,0x01,0x10,0xa0,0xe3,
	0x04,0x10,0x80,0xe5,0x00,0x10,0x80,0xe5,0x0e,0x34,0xa0,0xe3,0x1c,0x10,0x93,0xe5,
	0x02,0x1a,0x81,0xe3,0x1c,0x10,0x83,0xe5,0x58,0x11,0x9f,0xe5,0x30,0x10,0x80,0xe5,
	0x54,0x11,0x9f,0xe5,0x34,0x10,0x80,0xe5,0x38,0x10,0x80,0xe5,0x3c,0x10,0x80,0xe5,
	0x10,0x10,0x90,0xe5,0x08,0x00,0x90,0xe5,0x1e,0xff,0x2f,0xe1,0xf3,0x16,0xa0,0xe3,
	0x08,0x00,0x91,0xe5,0x05,0x00,0xa0,0xe3,0x0c,0x00,0x81,0xe5,0x10,0x00,0x91,0xe5,
	0x02,0x00,0x10,0xe3,0xfc,0xff,0xff,0x0a,0xff,0x00,0xa0,0xe3,0x0c,0x00,0x81,0xe5,
	0x10,0x00,0x91,0xe5,0x02,0x00,0x10,0xe3,0xfc,0xff,0xff,0x0a,0x08,0x00,0x91,0xe5,
	0x10,0x00,0x91,0xe5,0x01,0x00,0x10,0xe3,0xfc,0xff,0xff,0x0a,0x08,0x00,0x91,0xe5,
	0xff,0x00,0x00,0xe2,0x1e,0xff,0x2f,0xe1,0x30,0x40,0x2d,0xe9,0x00,0x50,0xa0,0xe1,
	0x03,0x40,0xa0,0xe1,0xa2,0x02,0xa0,0xe1,0x08,0x00,0x00,0xe2,0x03,0x00,0x80,0xe2,
	0xd8,0x10,0x9f,0xe5,0x00,0x00,0xc1,0xe5,0x01,0x20,0xc1,0xe5,0xe2,0xff,0xff,0xeb,
	0x01,0x00,0x10,0xe3,0xfc,0xff,0xff,0x1a,0x14,0x00,0xa0,0xe3,0xc4,0xff,0xff,0xeb,
	0x04,0x20,0xa0,0xe1,0x05,0x10,0xa0,0xe1,0x02,0x00,0xa0,0xe3,0x01,0x00,0x00,0xeb,
	0x30,0x40,0xbd,0xe8,0x1e,0xff,0x2f,0xe1,0x70,0x40,0x2d,0xe9,0xf3,0x46,0xa0,0xe3,
	0x00,0x30,0xa0,0xe3,0x00,0x00,0x50,0xe3,0x08,0x00,0x00,0x9a,0x8c,0x50,0x9f,0xe5,
	0x03,0x60,0xd5,0xe7,0x0c,0x60,0x84,0xe5,0x10,0x60,0x94,0xe5,0x02,0x00,0x16,0xe3,
	0xfc,0xff,0xff,0x0a,0x01,0x30,0x83,0xe2,0x00,0x00,0x53,0xe1,0xf7,0xff,0xff,0x3a,
	0xff,0x30,0xa0,0xe3,0x0c,0x30,0x84,0xe5,0x08,0x00,0x94,0xe5,0x10,0x00,0x94,0xe5,
	0x01,0x00,0x10,0xe3,0xfc,0xff,0xff,0x0a,0x08,0x00,0x94,0xe5,0x00,0x00,0xa0,0xe3,
	0x00,0x00,0x52,0xe3,0x0b,0x00,0x00,0x9a,0x10,0x50,0x94,0xe5,0x02,0x00,0x15,0xe3,
	0xfc,0xff,0xff,0x0a,0x0c,0x30,0x84,0xe5,0x10,0x50,0x94,0xe5,0x01,0x00,0x15,0xe3,
	0xfc,0xff,0xff,0x0a,0x08,0x50,0x94,0xe5,0x01,0x50,0xc1,0xe4,0x01,0x00,0x80,0xe2,
	0x02,0x00,0x50,0xe1,0xf3,0xff,0xff,0x3a,0xc8,0x00,0xa0,0xe3,0x98,0xff,0xff,0xeb,
	0x70,0x40,0xbd,0xe8,0x1e,0xff,0x2f,0xe1,0x01,0x0c,0x00,0x02,0x01,0x02,0x00,0x02,
	0x00,0x01,0x00,0x02
};

struct atmel_private {
	void *card; /* Bus dependent stucture varies for PCcard */
	int (*present_callback)(void *); /* And callback which uses it */
	char firmware_id[32];
	AtmelFWType firmware_type;
	u8 *firmware;
	int firmware_length;
	struct timer_list management_timer;
	struct net_device *dev;
	struct device *sys_dev;
	struct iw_statistics wstats;
	struct net_device_stats	stats;	// device stats
	spinlock_t irqlock, timerlock;	// spinlocks
	enum { BUS_TYPE_PCCARD, BUS_TYPE_PCI } bus_type;
	enum {
		CARD_TYPE_PARALLEL_FLASH,
		CARD_TYPE_SPI_FLASH,
		CARD_TYPE_EEPROM
	} card_type;
	int do_rx_crc; /* If we need to CRC incoming packets */
	int probe_crc; /* set if we don't yet know */
	int crc_ok_cnt, crc_ko_cnt; /* counters for probing */
	u16 rx_desc_head;
	u16 tx_desc_free, tx_desc_head, tx_desc_tail, tx_desc_previous;
	u16 tx_free_mem, tx_buff_head, tx_buff_tail;

	u16 frag_seq, frag_len, frag_no;
	u8 frag_source[6];

	u8 wep_is_on, default_key, exclude_unencrypted, encryption_level;
	u8 group_cipher_suite, pairwise_cipher_suite;
	u8 wep_keys[MAX_ENCRYPTION_KEYS][MAX_ENCRYPTION_KEY_SIZE];
	int wep_key_len[MAX_ENCRYPTION_KEYS];
	int use_wpa, radio_on_broken; /* firmware dependent stuff. */

	u16 host_info_base;
	struct host_info_struct {
		/* NB this is matched to the hardware, don't change. */
		u8 volatile int_status;
		u8 volatile int_mask;
		u8 volatile lockout_host;
		u8 volatile lockout_mac;

		u16 tx_buff_pos;
		u16 tx_buff_size;
		u16 tx_desc_pos;
		u16 tx_desc_count;

		u16 rx_buff_pos;
		u16 rx_buff_size;
		u16 rx_desc_pos;
		u16 rx_desc_count;

		u16 build_version;
		u16 command_pos;

		u16 major_version;
		u16 minor_version;

		u16 func_ctrl;
		u16 mac_status;
		u16 generic_IRQ_type;
		u8  reserved[2];
	} host_info;

	enum {
		STATION_STATE_SCANNING,
		STATION_STATE_JOINNING,
		STATION_STATE_AUTHENTICATING,
		STATION_STATE_ASSOCIATING,
		STATION_STATE_READY,
		STATION_STATE_REASSOCIATING,
		STATION_STATE_DOWN,
		STATION_STATE_MGMT_ERROR
	} station_state;

	int operating_mode, power_mode;
	time_t last_qual;
	int beacons_this_sec;
	int channel;
	int reg_domain, config_reg_domain;
	int tx_rate;
	int auto_tx_rate;
	int rts_threshold;
	int frag_threshold;
	int long_retry, short_retry;
	int preamble;
	int default_beacon_period, beacon_period, listen_interval;
	int CurrentAuthentTransactionSeqNum, ExpectedAuthentTransactionSeqNum;
	int AuthenticationRequestRetryCnt, AssociationRequestRetryCnt, ReAssociationRequestRetryCnt;
	enum {
		SITE_SURVEY_IDLE,
		SITE_SURVEY_IN_PROGRESS,
		SITE_SURVEY_COMPLETED
	} site_survey_state;
	time_t last_survey;

	int station_was_associated, station_is_associated;
	int fast_scan;

	struct bss_info {
		int channel;
		int SSIDsize;
		int RSSI;
		int UsingWEP;
		int preamble;
		int beacon_period;
		int BSStype;
		u8 BSSID[6];
		u8 SSID[MAX_SSID_LENGTH];
	} BSSinfo[MAX_BSS_ENTRIES];
	int BSS_list_entries, current_BSS;
	int connect_to_any_BSS;
	int SSID_size, new_SSID_size;
	u8 CurrentBSSID[6], BSSID[6];
	u8 SSID[MAX_SSID_LENGTH], new_SSID[MAX_SSID_LENGTH];
	u64 last_beacon_timestamp;
	u8 rx_buf[MAX_WIRELESS_BODY];
};

static u8 atmel_basic_rates[4] = {0x82,0x84,0x0b,0x16};

static const struct {
	int reg_domain;
	int min, max;
	char *name;
} channel_table[] = { { REG_DOMAIN_FCC, 1, 11, "USA" },
		      { REG_DOMAIN_DOC, 1, 11, "Canada" },
		      { REG_DOMAIN_ETSI, 1, 13, "Europe" },
		      { REG_DOMAIN_SPAIN, 10, 11, "Spain" },
		      { REG_DOMAIN_FRANCE, 10, 13, "France" },
		      { REG_DOMAIN_MKK, 14, 14, "MKK" },
		      { REG_DOMAIN_MKK1, 1, 14, "MKK1" },
		      { REG_DOMAIN_ISRAEL, 3, 9, "Israel"} };

static void build_wpa_mib(struct atmel_private *priv);
static int atmel_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static void atmel_copy_to_card(struct net_device *dev, u16 dest,
			       unsigned char *src, u16 len);
static void atmel_copy_to_host(struct net_device *dev, unsigned char *dest,
			       u16 src, u16 len);
static void atmel_set_gcr(struct net_device *dev, u16 mask);
static void atmel_clear_gcr(struct net_device *dev, u16 mask);
static int atmel_lock_mac(struct atmel_private *priv);
static void atmel_wmem32(struct atmel_private *priv, u16 pos, u32 data);
static void atmel_command_irq(struct atmel_private *priv);
static int atmel_validate_channel(struct atmel_private *priv, int channel);
static void atmel_management_frame(struct atmel_private *priv,
				   struct ieee80211_hdr_4addr *header,
				   u16 frame_len, u8 rssi);
static void atmel_management_timer(u_long a);
static void atmel_send_command(struct atmel_private *priv, int command,
			       void *cmd, int cmd_size);
static int atmel_send_command_wait(struct atmel_private *priv, int command,
				   void *cmd, int cmd_size);
static void atmel_transmit_management_frame(struct atmel_private *priv,
					    struct ieee80211_hdr_4addr *header,
					    u8 *body, int body_len);

static u8 atmel_get_mib8(struct atmel_private *priv, u8 type, u8 index);
static void atmel_set_mib8(struct atmel_private *priv, u8 type, u8 index,
			   u8 data);
static void atmel_set_mib16(struct atmel_private *priv, u8 type, u8 index,
			    u16 data);
static void atmel_set_mib(struct atmel_private *priv, u8 type, u8 index,
			  u8 *data, int data_len);
static void atmel_get_mib(struct atmel_private *priv, u8 type, u8 index,
			  u8 *data, int data_len);
static void atmel_scan(struct atmel_private *priv, int specific_ssid);
static void atmel_join_bss(struct atmel_private *priv, int bss_index);
static void atmel_smooth_qual(struct atmel_private *priv);
static void atmel_writeAR(struct net_device *dev, u16 data);
static int probe_atmel_card(struct net_device *dev);
static int reset_atmel_card(struct net_device *dev );
static void atmel_enter_state(struct atmel_private *priv, int new_state);
int atmel_open (struct net_device *dev);

static inline u16 atmel_hi(struct atmel_private *priv, u16 offset)
{
	return priv->host_info_base + offset;
}

static inline u16 atmel_co(struct atmel_private *priv, u16 offset)
{
	return priv->host_info.command_pos + offset;
}

static inline u16 atmel_rx(struct atmel_private *priv, u16 offset, u16 desc)
{
	return priv->host_info.rx_desc_pos + (sizeof(struct rx_desc) * desc) + offset;
}

static inline u16 atmel_tx(struct atmel_private *priv, u16 offset, u16 desc)
{
	return priv->host_info.tx_desc_pos + (sizeof(struct tx_desc) * desc) + offset;
}

static inline u8 atmel_read8(struct net_device *dev, u16 offset)
{
	return inb(dev->base_addr + offset);
}

static inline void atmel_write8(struct net_device *dev, u16 offset, u8 data)
{
	outb(data, dev->base_addr + offset);
}

static inline u16 atmel_read16(struct net_device *dev, u16 offset)
{
	return inw(dev->base_addr + offset);
}

static inline void atmel_write16(struct net_device *dev, u16 offset, u16 data)
{
	outw(data, dev->base_addr + offset);
}

static inline u8 atmel_rmem8(struct atmel_private *priv, u16 pos)
{
	atmel_writeAR(priv->dev, pos);
	return atmel_read8(priv->dev, DR);
}

static inline void atmel_wmem8(struct atmel_private *priv, u16 pos, u16 data)
{
	atmel_writeAR(priv->dev, pos);
	atmel_write8(priv->dev, DR, data);
}

static inline u16 atmel_rmem16(struct atmel_private *priv, u16 pos)
{
	atmel_writeAR(priv->dev, pos);
	return atmel_read16(priv->dev, DR);
}

static inline void atmel_wmem16(struct atmel_private *priv, u16 pos, u16 data)
{
	atmel_writeAR(priv->dev, pos);
	atmel_write16(priv->dev, DR, data);
}

static const struct iw_handler_def atmel_handler_def;

static void tx_done_irq(struct atmel_private *priv)
{
	int i;

	for (i = 0;
	     atmel_rmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, priv->tx_desc_head)) == TX_DONE &&
		     i < priv->host_info.tx_desc_count;
	     i++) {
		u8 status = atmel_rmem8(priv, atmel_tx(priv, TX_DESC_STATUS_OFFSET, priv->tx_desc_head));
		u16 msdu_size = atmel_rmem16(priv, atmel_tx(priv, TX_DESC_SIZE_OFFSET, priv->tx_desc_head));
		u8 type = atmel_rmem8(priv, atmel_tx(priv, TX_DESC_PACKET_TYPE_OFFSET, priv->tx_desc_head));

		atmel_wmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, priv->tx_desc_head), 0);

		priv->tx_free_mem += msdu_size;
		priv->tx_desc_free++;

		if (priv->tx_buff_head + msdu_size > (priv->host_info.tx_buff_pos + priv->host_info.tx_buff_size))
			priv->tx_buff_head = 0;
		else
			priv->tx_buff_head += msdu_size;

		if (priv->tx_desc_head < (priv->host_info.tx_desc_count - 1))
			priv->tx_desc_head++ ;
		else
			priv->tx_desc_head = 0;

		if (type == TX_PACKET_TYPE_DATA) {
			if (status == TX_STATUS_SUCCESS)
				priv->stats.tx_packets++;
			else
				priv->stats.tx_errors++;
			netif_wake_queue(priv->dev);
		}
	}
}

static u16 find_tx_buff(struct atmel_private *priv, u16 len)
{
	u16 bottom_free = priv->host_info.tx_buff_size - priv->tx_buff_tail;

	if (priv->tx_desc_free == 3 || priv->tx_free_mem < len)
		return 0;

	if (bottom_free >= len)
		return priv->host_info.tx_buff_pos + priv->tx_buff_tail;

	if (priv->tx_free_mem - bottom_free >= len) {
		priv->tx_buff_tail = 0;
		return priv->host_info.tx_buff_pos;
	}

	return 0;
}

static void tx_update_descriptor(struct atmel_private *priv, int is_bcast,
				 u16 len, u16 buff, u8 type)
{
	atmel_wmem16(priv, atmel_tx(priv, TX_DESC_POS_OFFSET, priv->tx_desc_tail), buff);
	atmel_wmem16(priv, atmel_tx(priv, TX_DESC_SIZE_OFFSET, priv->tx_desc_tail), len);
	if (!priv->use_wpa)
		atmel_wmem16(priv, atmel_tx(priv, TX_DESC_HOST_LENGTH_OFFSET, priv->tx_desc_tail), len);
	atmel_wmem8(priv, atmel_tx(priv, TX_DESC_PACKET_TYPE_OFFSET, priv->tx_desc_tail), type);
	atmel_wmem8(priv, atmel_tx(priv, TX_DESC_RATE_OFFSET, priv->tx_desc_tail), priv->tx_rate);
	atmel_wmem8(priv, atmel_tx(priv, TX_DESC_RETRY_OFFSET, priv->tx_desc_tail), 0);
	if (priv->use_wpa) {
		int cipher_type, cipher_length;
		if (is_bcast) {
			cipher_type = priv->group_cipher_suite;
			if (cipher_type == CIPHER_SUITE_WEP_64 ||
			    cipher_type == CIPHER_SUITE_WEP_128)
				cipher_length = 8;
			else if (cipher_type == CIPHER_SUITE_TKIP)
				cipher_length = 12;
			else if (priv->pairwise_cipher_suite == CIPHER_SUITE_WEP_64 ||
				 priv->pairwise_cipher_suite == CIPHER_SUITE_WEP_128) {
				cipher_type = priv->pairwise_cipher_suite;
				cipher_length = 8;
			} else {
				cipher_type = CIPHER_SUITE_NONE;
				cipher_length = 0;
			}
		} else {
			cipher_type = priv->pairwise_cipher_suite;
			if (cipher_type == CIPHER_SUITE_WEP_64 ||
			    cipher_type == CIPHER_SUITE_WEP_128)
				cipher_length = 8;
			else if (cipher_type == CIPHER_SUITE_TKIP)
				cipher_length = 12;
			else if (priv->group_cipher_suite == CIPHER_SUITE_WEP_64 ||
				 priv->group_cipher_suite == CIPHER_SUITE_WEP_128) {
				cipher_type = priv->group_cipher_suite;
				cipher_length = 8;
			} else {
				cipher_type = CIPHER_SUITE_NONE;
				cipher_length = 0;
			}
		}

		atmel_wmem8(priv, atmel_tx(priv, TX_DESC_CIPHER_TYPE_OFFSET, priv->tx_desc_tail),
			    cipher_type);
		atmel_wmem8(priv, atmel_tx(priv, TX_DESC_CIPHER_LENGTH_OFFSET, priv->tx_desc_tail),
			    cipher_length);
	}
	atmel_wmem32(priv, atmel_tx(priv, TX_DESC_NEXT_OFFSET, priv->tx_desc_tail), 0x80000000L);
	atmel_wmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, priv->tx_desc_tail), TX_FIRM_OWN);
	if (priv->tx_desc_previous != priv->tx_desc_tail)
		atmel_wmem32(priv, atmel_tx(priv, TX_DESC_NEXT_OFFSET, priv->tx_desc_previous), 0);
	priv->tx_desc_previous = priv->tx_desc_tail;
	if (priv->tx_desc_tail < (priv->host_info.tx_desc_count - 1))
		priv->tx_desc_tail++;
	else
		priv->tx_desc_tail = 0;
	priv->tx_desc_free--;
	priv->tx_free_mem -= len;
}

static int start_tx(struct sk_buff *skb, struct net_device *dev)
{
	struct atmel_private *priv = netdev_priv(dev);
	struct ieee80211_hdr_4addr header;
	unsigned long flags;
	u16 buff, frame_ctl, len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
	u8 SNAP_RFC1024[6] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};

	if (priv->card && priv->present_callback &&
	    !(*priv->present_callback)(priv->card)) {
		priv->stats.tx_errors++;
		dev_kfree_skb(skb);
		return 0;
	}

	if (priv->station_state != STATION_STATE_READY) {
		priv->stats.tx_errors++;
		dev_kfree_skb(skb);
		return 0;
	}

	/* first ensure the timer func cannot run */
	spin_lock_bh(&priv->timerlock);
	/* then stop the hardware ISR */
	spin_lock_irqsave(&priv->irqlock, flags);
	/* nb doing the above in the opposite order will deadlock */

	/* The Wireless Header is 30 bytes. In the Ethernet packet we "cut" the
	   12 first bytes (containing DA/SA) and put them in the appropriate
	   fields of the Wireless Header. Thus the packet length is then the
	   initial + 18 (+30-12) */

	if (!(buff = find_tx_buff(priv, len + 18))) {
		priv->stats.tx_dropped++;
		spin_unlock_irqrestore(&priv->irqlock, flags);
		spin_unlock_bh(&priv->timerlock);
		netif_stop_queue(dev);
		return 1;
	}

	frame_ctl = IEEE80211_FTYPE_DATA;
	header.duration_id = 0;
	header.seq_ctl = 0;
	if (priv->wep_is_on)
		frame_ctl |= IEEE80211_FCTL_PROTECTED;
	if (priv->operating_mode == IW_MODE_ADHOC) {
		memcpy(&header.addr1, skb->data, 6);
		memcpy(&header.addr2, dev->dev_addr, 6);
		memcpy(&header.addr3, priv->BSSID, 6);
	} else {
		frame_ctl |= IEEE80211_FCTL_TODS;
		memcpy(&header.addr1, priv->CurrentBSSID, 6);
		memcpy(&header.addr2, dev->dev_addr, 6);
		memcpy(&header.addr3, skb->data, 6);
	}

	if (priv->use_wpa)
		memcpy(&header.addr4, SNAP_RFC1024, 6);

	header.frame_ctl = cpu_to_le16(frame_ctl);
	/* Copy the wireless header into the card */
	atmel_copy_to_card(dev, buff, (unsigned char *)&header, DATA_FRAME_WS_HEADER_SIZE);
	/* Copy the packet sans its 802.3 header addresses which have been replaced */
	atmel_copy_to_card(dev, buff + DATA_FRAME_WS_HEADER_SIZE, skb->data + 12, len - 12);
	priv->tx_buff_tail += len - 12 + DATA_FRAME_WS_HEADER_SIZE;

	/* low bit of first byte of destination tells us if broadcast */
	tx_update_descriptor(priv, *(skb->data) & 0x01, len + 18, buff, TX_PACKET_TYPE_DATA);
	dev->trans_start = jiffies;
	priv->stats.tx_bytes += len;

	spin_unlock_irqrestore(&priv->irqlock, flags);
	spin_unlock_bh(&priv->timerlock);
	dev_kfree_skb(skb);

	return 0;
}

static void atmel_transmit_management_frame(struct atmel_private *priv,
					    struct ieee80211_hdr_4addr *header,
					    u8 *body, int body_len)
{
	u16 buff;
	int len = MGMT_FRAME_BODY_OFFSET + body_len;

	if (!(buff = find_tx_buff(priv, len)))
		return;

	atmel_copy_to_card(priv->dev, buff, (u8 *)header, MGMT_FRAME_BODY_OFFSET);
	atmel_copy_to_card(priv->dev, buff + MGMT_FRAME_BODY_OFFSET, body, body_len);
	priv->tx_buff_tail += len;
	tx_update_descriptor(priv, header->addr1[0] & 0x01, len, buff, TX_PACKET_TYPE_MGMT);
}

static void fast_rx_path(struct atmel_private *priv,
			 struct ieee80211_hdr_4addr *header,
			 u16 msdu_size, u16 rx_packet_loc, u32 crc)
{
	/* fast path: unfragmented packet copy directly into skbuf */
	u8 mac4[6];
	struct sk_buff	*skb;
	unsigned char *skbp;

	/* get the final, mac 4 header field, this tells us encapsulation */
	atmel_copy_to_host(priv->dev, mac4, rx_packet_loc + 24, 6);
	msdu_size -= 6;

	if (priv->do_rx_crc) {
		crc = crc32_le(crc, mac4, 6);
		msdu_size -= 4;
	}

	if (!(skb = dev_alloc_skb(msdu_size + 14))) {
		priv->stats.rx_dropped++;
		return;
	}

	skb_reserve(skb, 2);
	skbp = skb_put(skb, msdu_size + 12);
	atmel_copy_to_host(priv->dev, skbp + 12, rx_packet_loc + 30, msdu_size);

	if (priv->do_rx_crc) {
		u32 netcrc;
		crc = crc32_le(crc, skbp + 12, msdu_size);
		atmel_copy_to_host(priv->dev, (void *)&netcrc, rx_packet_loc + 30 + msdu_size, 4);
		if ((crc ^ 0xffffffff) != netcrc) {
			priv->stats.rx_crc_errors++;
			dev_kfree_skb(skb);
			return;
		}
	}

	memcpy(skbp, header->addr1, 6); /* destination address */
	if (le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_FROMDS)
		memcpy(&skbp[6], header->addr3, 6);
	else
		memcpy(&skbp[6], header->addr2, 6); /* source address */

	priv->dev->last_rx = jiffies;
	skb->dev = priv->dev;
	skb->protocol = eth_type_trans(skb, priv->dev);
	skb->ip_summed = CHECKSUM_NONE;
	netif_rx(skb);
	priv->stats.rx_bytes += 12 + msdu_size;
	priv->stats.rx_packets++;
}

/* Test to see if the packet in card memory at packet_loc has a valid CRC
   It doesn't matter that this is slow: it is only used to proble the first few
   packets. */
static int probe_crc(struct atmel_private *priv, u16 packet_loc, u16 msdu_size)
{
	int i = msdu_size - 4;
	u32 netcrc, crc = 0xffffffff;

	if (msdu_size < 4)
		return 0;

	atmel_copy_to_host(priv->dev, (void *)&netcrc, packet_loc + i, 4);

	atmel_writeAR(priv->dev, packet_loc);
	while (i--) {
		u8 octet = atmel_read8(priv->dev, DR);
		crc = crc32_le(crc, &octet, 1);
	}

	return (crc ^ 0xffffffff) == netcrc;
}

static void frag_rx_path(struct atmel_private *priv,
			 struct ieee80211_hdr_4addr *header,
			 u16 msdu_size, u16 rx_packet_loc, u32 crc, u16 seq_no,
			 u8 frag_no, int more_frags)
{
	u8 mac4[6];
	u8 source[6];
	struct sk_buff *skb;

	if (le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_FROMDS)
		memcpy(source, header->addr3, 6);
	else
		memcpy(source, header->addr2, 6);

	rx_packet_loc += 24; /* skip header */

	if (priv->do_rx_crc)
		msdu_size -= 4;

	if (frag_no == 0) { /* first fragment */
		atmel_copy_to_host(priv->dev, mac4, rx_packet_loc, 6);
		msdu_size -= 6;
		rx_packet_loc += 6;

		if (priv->do_rx_crc)
			crc = crc32_le(crc, mac4, 6);

		priv->frag_seq = seq_no;
		priv->frag_no = 1;
		priv->frag_len = msdu_size;
		memcpy(priv->frag_source, source, 6);
		memcpy(&priv->rx_buf[6], source, 6);
		memcpy(priv->rx_buf, header->addr1, 6);

		atmel_copy_to_host(priv->dev, &priv->rx_buf[12], rx_packet_loc, msdu_size);

		if (priv->do_rx_crc) {
			u32 netcrc;
			crc = crc32_le(crc, &priv->rx_buf[12], msdu_size);
			atmel_copy_to_host(priv->dev, (void *)&netcrc, rx_packet_loc + msdu_size, 4);
			if ((crc ^ 0xffffffff) != netcrc) {
				priv->stats.rx_crc_errors++;
				memset(priv->frag_source, 0xff, 6);
			}
		}

	} else if (priv->frag_no == frag_no &&
		   priv->frag_seq == seq_no &&
		   memcmp(priv->frag_source, source, 6) == 0) {

		atmel_copy_to_host(priv->dev, &priv->rx_buf[12 + priv->frag_len],
				   rx_packet_loc, msdu_size);
		if (priv->do_rx_crc) {
			u32 netcrc;
			crc = crc32_le(crc,
				       &priv->rx_buf[12 + priv->frag_len],
				       msdu_size);
			atmel_copy_to_host(priv->dev, (void *)&netcrc, rx_packet_loc + msdu_size, 4);
			if ((crc ^ 0xffffffff) != netcrc) {
				priv->stats.rx_crc_errors++;
				memset(priv->frag_source, 0xff, 6);
				more_frags = 1; /* don't send broken assembly */
			}
		}

		priv->frag_len += msdu_size;
		priv->frag_no++;

		if (!more_frags) { /* last one */
			memset(priv->frag_source, 0xff, 6);
			if (!(skb = dev_alloc_skb(priv->frag_len + 14))) {
				priv->stats.rx_dropped++;
			} else {
				skb_reserve(skb, 2);
				memcpy(skb_put(skb, priv->frag_len + 12),
				       priv->rx_buf,
				       priv->frag_len + 12);
				priv->dev->last_rx = jiffies;
				skb->dev = priv->dev;
				skb->protocol = eth_type_trans(skb, priv->dev);
				skb->ip_summed = CHECKSUM_NONE;
				netif_rx(skb);
				priv->stats.rx_bytes += priv->frag_len + 12;
				priv->stats.rx_packets++;
			}
		}
	} else
		priv->wstats.discard.fragment++;
}

static void rx_done_irq(struct atmel_private *priv)
{
	int i;
	struct ieee80211_hdr_4addr header;

	for (i = 0;
	     atmel_rmem8(priv, atmel_rx(priv, RX_DESC_FLAGS_OFFSET, priv->rx_desc_head)) == RX_DESC_FLAG_VALID &&
		     i < priv->host_info.rx_desc_count;
	     i++) {

		u16 msdu_size, rx_packet_loc, frame_ctl, seq_control;
		u8 status = atmel_rmem8(priv, atmel_rx(priv, RX_DESC_STATUS_OFFSET, priv->rx_desc_head));
		u32 crc = 0xffffffff;

		if (status != RX_STATUS_SUCCESS) {
			if (status == 0xc1) /* determined by experiment */
				priv->wstats.discard.nwid++;
			else
				priv->stats.rx_errors++;
			goto next;
		}

		msdu_size = atmel_rmem16(priv, atmel_rx(priv, RX_DESC_MSDU_SIZE_OFFSET, priv->rx_desc_head));
		rx_packet_loc = atmel_rmem16(priv, atmel_rx(priv, RX_DESC_MSDU_POS_OFFSET, priv->rx_desc_head));

		if (msdu_size < 30) {
			priv->stats.rx_errors++;
			goto next;
		}

		/* Get header as far as end of seq_ctl */
		atmel_copy_to_host(priv->dev, (char *)&header, rx_packet_loc, 24);
		frame_ctl = le16_to_cpu(header.frame_ctl);
		seq_control = le16_to_cpu(header.seq_ctl);

		/* probe for CRC use here if needed  once five packets have
		   arrived with the same crc status, we assume we know what's
		   happening and stop probing */
		if (priv->probe_crc) {
			if (!priv->wep_is_on || !(frame_ctl & IEEE80211_FCTL_PROTECTED)) {
				priv->do_rx_crc = probe_crc(priv, rx_packet_loc, msdu_size);
			} else {
				priv->do_rx_crc = probe_crc(priv, rx_packet_loc + 24, msdu_size - 24);
			}
			if (priv->do_rx_crc) {
				if (priv->crc_ok_cnt++ > 5)
					priv->probe_crc = 0;
			} else {
				if (priv->crc_ko_cnt++ > 5)
					priv->probe_crc = 0;
			}
		}

		/* don't CRC header when WEP in use */
		if (priv->do_rx_crc && (!priv->wep_is_on || !(frame_ctl & IEEE80211_FCTL_PROTECTED))) {
			crc = crc32_le(0xffffffff, (unsigned char *)&header, 24);
		}
		msdu_size -= 24; /* header */

		if ((frame_ctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) {
			int more_fragments = frame_ctl & IEEE80211_FCTL_MOREFRAGS;
			u8 packet_fragment_no = seq_control & IEEE80211_SCTL_FRAG;
			u16 packet_sequence_no = (seq_control & IEEE80211_SCTL_SEQ) >> 4;

			if (!more_fragments && packet_fragment_no == 0) {
				fast_rx_path(priv, &header, msdu_size, rx_packet_loc, crc);
			} else {
				frag_rx_path(priv, &header, msdu_size, rx_packet_loc, crc,
					     packet_sequence_no, packet_fragment_no, more_fragments);
			}
		}

		if ((frame_ctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
			/* copy rest of packet into buffer */
			atmel_copy_to_host(priv->dev, (unsigned char *)&priv->rx_buf, rx_packet_loc + 24, msdu_size);

			/* we use the same buffer for frag reassembly and control packets */
			memset(priv->frag_source, 0xff, 6);

			if (priv->do_rx_crc) {
				/* last 4 octets is crc */
				msdu_size -= 4;
				crc = crc32_le(crc, (unsigned char *)&priv->rx_buf, msdu_size);
				if ((crc ^ 0xffffffff) != (*((u32 *)&priv->rx_buf[msdu_size]))) {
					priv->stats.rx_crc_errors++;
					goto next;
				}
			}

			atmel_management_frame(priv, &header, msdu_size,
					       atmel_rmem8(priv, atmel_rx(priv, RX_DESC_RSSI_OFFSET, priv->rx_desc_head)));
		}

next:
		/* release descriptor */
		atmel_wmem8(priv, atmel_rx(priv, RX_DESC_FLAGS_OFFSET, priv->rx_desc_head), RX_DESC_FLAG_CONSUMED);

		if (priv->rx_desc_head < (priv->host_info.rx_desc_count - 1))
			priv->rx_desc_head++;
		else
			priv->rx_desc_head = 0;
	}
}

static irqreturn_t service_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	struct net_device *dev = (struct net_device *) dev_id;
	struct atmel_private *priv = netdev_priv(dev);
	u8 isr;
	int i = -1;
	static u8 irq_order[] = {
		ISR_OUT_OF_RANGE,
		ISR_RxCOMPLETE,
		ISR_TxCOMPLETE,
		ISR_RxFRAMELOST,
		ISR_FATAL_ERROR,
		ISR_COMMAND_COMPLETE,
		ISR_IBSS_MERGE,
		ISR_GENERIC_IRQ
	};

	if (priv->card && priv->present_callback &&
	    !(*priv->present_callback)(priv->card))
		return IRQ_HANDLED;

	/* In this state upper-level code assumes it can mess with
	   the card unhampered by interrupts which may change register state.
	   Note that even though the card shouldn't generate interrupts
	   the inturrupt line may be shared. This allows card setup
	   to go on without disabling interrupts for a long time. */
	if (priv->station_state == STATION_STATE_DOWN)
		return IRQ_NONE;

	atmel_clear_gcr(dev, GCR_ENINT); /* disable interrupts */

	while (1) {
		if (!atmel_lock_mac(priv)) {
			/* failed to contact card */
			printk(KERN_ALERT "%s: failed to contact MAC.\n", dev->name);
			return IRQ_HANDLED;
		}

		isr = atmel_rmem8(priv, atmel_hi(priv, IFACE_INT_STATUS_OFFSET));
		atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 0);

		if (!isr) {
			atmel_set_gcr(dev, GCR_ENINT); /* enable interrupts */
			return i == -1 ? IRQ_NONE : IRQ_HANDLED;
		}

		atmel_set_gcr(dev, GCR_ACKINT); /* acknowledge interrupt */

		for (i = 0; i < sizeof(irq_order)/sizeof(u8); i++)
			if (isr & irq_order[i])
				break;

		if (!atmel_lock_mac(priv)) {
			/* failed to contact card */
			printk(KERN_ALERT "%s: failed to contact MAC.\n", dev->name);
			return IRQ_HANDLED;
		}

		isr = atmel_rmem8(priv, atmel_hi(priv, IFACE_INT_STATUS_OFFSET));
		isr ^= irq_order[i];
		atmel_wmem8(priv, atmel_hi(priv, IFACE_INT_STATUS_OFFSET), isr);
		atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 0);

		switch (irq_order[i]) {

		case ISR_OUT_OF_RANGE:
			if (priv->operating_mode == IW_MODE_INFRA &&
			    priv->station_state == STATION_STATE_READY) {
				priv->station_is_associated = 0;
				atmel_scan(priv, 1);
			}
			break;

		case ISR_RxFRAMELOST:
			priv->wstats.discard.misc++;
			/* fall through */
		case ISR_RxCOMPLETE:
			rx_done_irq(priv);
			break;

		case ISR_TxCOMPLETE:
			tx_done_irq(priv);
			break;

		case ISR_FATAL_ERROR:
			printk(KERN_ALERT "%s: *** FATAL error interrupt ***\n", dev->name);
			atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
			break;

		case ISR_COMMAND_COMPLETE:
			atmel_command_irq(priv);
			break;

		case ISR_IBSS_MERGE:
			atmel_get_mib(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_CUR_BSSID_POS,
				      priv->CurrentBSSID, 6);
			/* The WPA stuff cares about the current AP address */
			if (priv->use_wpa)
				build_wpa_mib(priv);
			break;
		case ISR_GENERIC_IRQ:
			printk(KERN_INFO "%s: Generic_irq received.\n", dev->name);
			break;
		}
	}
}

static struct net_device_stats *atmel_get_stats(struct net_device *dev)
{
	struct atmel_private *priv = netdev_priv(dev);
	return &priv->stats;
}

static struct iw_statistics *atmel_get_wireless_stats(struct net_device *dev)
{
	struct atmel_private *priv = netdev_priv(dev);

	/* update the link quality here in case we are seeing no beacons
	   at all to drive the process */
	atmel_smooth_qual(priv);

	priv->wstats.status = priv->station_state;

	if (priv->operating_mode == IW_MODE_INFRA) {
		if (priv->station_state != STATION_STATE_READY) {
			priv->wstats.qual.qual = 0;
			priv->wstats.qual.level = 0;
			priv->wstats.qual.updated = (IW_QUAL_QUAL_INVALID
					| IW_QUAL_LEVEL_INVALID);
		}
		priv->wstats.qual.noise = 0;
		priv->wstats.qual.updated |= IW_QUAL_NOISE_INVALID;
	} else {
		/* Quality levels cannot be determined in ad-hoc mode,
		   because we can 'hear' more that one remote station. */
		priv->wstats.qual.qual = 0;
		priv->wstats.qual.level	= 0;
		priv->wstats.qual.noise	= 0;
		priv->wstats.qual.updated = IW_QUAL_QUAL_INVALID
					| IW_QUAL_LEVEL_INVALID
					| IW_QUAL_NOISE_INVALID;
		priv->wstats.miss.beacon = 0;
	}

	return &priv->wstats;
}

static int atmel_change_mtu(struct net_device *dev, int new_mtu)
{
        if ((new_mtu < 68) || (new_mtu > 2312))
                return -EINVAL;
        dev->mtu = new_mtu;
        return 0;
}

static int atmel_set_mac_address(struct net_device *dev, void *p)
{
	struct sockaddr *addr = p;

        memcpy (dev->dev_addr, addr->sa_data, dev->addr_len);
	return atmel_open(dev);
}

EXPORT_SYMBOL(atmel_open);

int atmel_open(struct net_device *dev)
{
	struct atmel_private *priv = netdev_priv(dev);
	int i, channel;

	/* any scheduled timer is no longer needed and might screw things up.. */
	del_timer_sync(&priv->management_timer);

	/* Interrupts will not touch the card once in this state... */
	priv->station_state = STATION_STATE_DOWN;

	if (priv->new_SSID_size) {
		memcpy(priv->SSID, priv->new_SSID, priv->new_SSID_size);
		priv->SSID_size = priv->new_SSID_size;
		priv->new_SSID_size = 0;
	}
	priv->BSS_list_entries = 0;

	priv->AuthenticationRequestRetryCnt = 0;
	priv->AssociationRequestRetryCnt = 0;
	priv->ReAssociationRequestRetryCnt = 0;
	priv->CurrentAuthentTransactionSeqNum = 0x0001;
	priv->ExpectedAuthentTransactionSeqNum = 0x0002;

	priv->site_survey_state = SITE_SURVEY_IDLE;
	priv->station_is_associated = 0;

	if (!reset_atmel_card(dev))
		return -EAGAIN;

	if (priv->config_reg_domain) {
		priv->reg_domain = priv->config_reg_domain;
		atmel_set_mib8(priv, Phy_Mib_Type, PHY_MIB_REG_DOMAIN_POS, priv->reg_domain);
	} else {
		priv->reg_domain = atmel_get_mib8(priv, Phy_Mib_Type, PHY_MIB_REG_DOMAIN_POS);
		for (i = 0; i < sizeof(channel_table)/sizeof(channel_table[0]); i++)
			if (priv->reg_domain == channel_table[i].reg_domain)
				break;
		if (i == sizeof(channel_table)/sizeof(channel_table[0])) {
			priv->reg_domain = REG_DOMAIN_MKK1;
			printk(KERN_ALERT "%s: failed to get regulatory domain: assuming MKK1.\n", dev->name);
		}
	}

	if ((channel = atmel_validate_channel(priv, priv->channel)))
		priv->channel = channel;

	/* this moves station_state on.... */
	atmel_scan(priv, 1);

	atmel_set_gcr(priv->dev, GCR_ENINT); /* enable interrupts */
	return 0;
}

static int atmel_close(struct net_device *dev)
{
	struct atmel_private *priv = netdev_priv(dev);

	/* Send event to userspace that we are disassociating */
	if (priv->station_state == STATION_STATE_READY) {
		union iwreq_data wrqu;

		wrqu.data.length = 0;
		wrqu.data.flags = 0;
		wrqu.ap_addr.sa_family = ARPHRD_ETHER;
		memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
		wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
	}

	atmel_enter_state(priv, STATION_STATE_DOWN);

	if (priv->bus_type == BUS_TYPE_PCCARD)
		atmel_write16(dev, GCR, 0x0060);
	atmel_write16(dev, GCR, 0x0040);
	return 0;
}

static int atmel_validate_channel(struct atmel_private *priv, int channel)
{
	/* check that channel is OK, if so return zero,
	   else return suitable default channel */
	int i;

	for (i = 0; i < sizeof(channel_table)/sizeof(channel_table[0]); i++)
		if (priv->reg_domain == channel_table[i].reg_domain) {
			if (channel >= channel_table[i].min &&
			    channel <= channel_table[i].max)
				return 0;
			else
				return channel_table[i].min;
		}
	return 0;
}

static int atmel_proc_output (char *buf, struct atmel_private *priv)
{
	int i;
	char *p = buf;
	char *s, *r, *c;

	p += sprintf(p, "Driver version:\t\t%d.%d\n",
		     DRIVER_MAJOR, DRIVER_MINOR);

	if (priv->station_state != STATION_STATE_DOWN) {
		p += sprintf(p, "Firmware version:\t%d.%d build %d\n"
				"Firmware location:\t",
			     priv->host_info.major_version,
			     priv->host_info.minor_version,
			     priv->host_info.build_version);

		if (priv->card_type != CARD_TYPE_EEPROM)
			p += sprintf(p, "on card\n");
		else if (priv->firmware)
			p += sprintf(p, "%s loaded by host\n",
				     priv->firmware_id);
		else
			p += sprintf(p, "%s loaded by hotplug\n",
				     priv->firmware_id);

		switch (priv->card_type) {
		case CARD_TYPE_PARALLEL_FLASH: c = "Parallel flash"; break;
		case CARD_TYPE_SPI_FLASH: c = "SPI flash\n"; break;
		case CARD_TYPE_EEPROM: c = "EEPROM"; break;
		default: c = "<unknown>";
		}

		r = "<unknown>";
		for (i = 0; i < sizeof(channel_table)/sizeof(channel_table[0]); i++)
			if (priv->reg_domain == channel_table[i].reg_domain)
				r = channel_table[i].name;

		p += sprintf(p, "MAC memory type:\t%s\n", c);
		p += sprintf(p, "Regulatory domain:\t%s\n", r);
		p += sprintf(p, "Host CRC checking:\t%s\n",
			     priv->do_rx_crc ? "On" : "Off");
		p += sprintf(p, "WPA-capable firmware:\t%s\n",
			     priv->use_wpa ? "Yes" : "No");
	}

	switch(priv->station_state) {
	case STATION_STATE_SCANNING: s = "Scanning"; break;
	case STATION_STATE_JOINNING: s = "Joining"; break;
	case STATION_STATE_AUTHENTICATING: s = "Authenticating"; break;
	case STATION_STATE_ASSOCIATING: s = "Associating"; break;
	case STATION_STATE_READY: s = "Ready"; break;
	case STATION_STATE_REASSOCIATING: s = "Reassociating"; break;
	case STATION_STATE_MGMT_ERROR: s = "Management error"; break;
	case STATION_STATE_DOWN: s = "Down"; break;
	default: s = "<unknown>";
	}

	p += sprintf(p, "Current state:\t\t%s\n", s);
	return p - buf;
}

static int atmel_read_proc(char *page, char **start, off_t off,
			   int count, int *eof, void *data)
{
        struct atmel_private *priv = data;
	int len = atmel_proc_output (page, priv);
        if (len <= off+count) *eof = 1;
        *start = page + off;
        len -= off;
        if (len>count) len = count;
        if (len<0) len = 0;
        return len;
}

struct net_device *init_atmel_card(unsigned short irq, unsigned long port,
				   const AtmelFWType fw_type,
				   struct device *sys_dev,
				   int (*card_present)(void *), void *card)
{
	struct proc_dir_entry *ent;
	struct net_device *dev;
	struct atmel_private *priv;
	int rc;

	/* Create the network device object. */
        dev = alloc_etherdev(sizeof(*priv));
        if (!dev) {
		printk(KERN_ERR "atmel: Couldn't alloc_etherdev\n");
		return NULL;
        }
	if (dev_alloc_name(dev, dev->name) < 0) {
		printk(KERN_ERR "atmel: Couldn't get name!\n");
		goto err_out_free;
	}

	priv = netdev_priv(dev);
	priv->dev = dev;
	priv->sys_dev = sys_dev;
	priv->present_callback = card_present;
	priv->card = card;
	priv->firmware = NULL;
	priv->firmware_id[0] = '\0';
	priv->firmware_type = fw_type;
	if (firmware) /* module parameter */
		strcpy(priv->firmware_id, firmware);
	priv->bus_type = card_present ? BUS_TYPE_PCCARD : BUS_TYPE_PCI;
	priv->station_state = STATION_STATE_DOWN;
	priv->do_rx_crc = 0;
	/* For PCMCIA cards, some chips need CRC, some don't
	   so we have to probe. */
	if (priv->bus_type == BUS_TYPE_PCCARD) {
		priv->probe_crc = 1;
		priv->crc_ok_cnt = priv->crc_ko_cnt = 0;
	} else
		priv->probe_crc = 0;
	memset(&priv->stats, 0, sizeof(priv->stats));
	memset(&priv->wstats, 0, sizeof(priv->wstats));
	priv->last_qual = jiffies;
	priv->last_beacon_timestamp = 0;
	memset(priv->frag_source, 0xff, sizeof(priv->frag_source));
	memset(priv->BSSID, 0, 6);
	priv->CurrentBSSID[0] = 0xFF; /* Initialize to something invalid.... */
	priv->station_was_associated = 0;

	priv->last_survey = jiffies;
	priv->preamble = LONG_PREAMBLE;
	priv->operating_mode = IW_MODE_INFRA;
	priv->connect_to_any_BSS = 0;
	priv->config_reg_domain = 0;
	priv->reg_domain = 0;
	priv->tx_rate = 3;
	priv->auto_tx_rate = 1;
	priv->channel = 4;
	priv->power_mode = 0;
	priv->SSID[0] = '\0';
	priv->SSID_size = 0;
	priv->new_SSID_size = 0;
	priv->frag_threshold = 2346;
	priv->rts_threshold = 2347;
	priv->short_retry = 7;
	priv->long_retry = 4;

	priv->wep_is_on = 0;
	priv->default_key = 0;
	priv->encryption_level = 0;
	priv->exclude_unencrypted = 0;
	priv->group_cipher_suite = priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
	priv->use_wpa = 0;
	memset(priv->wep_keys, 0, sizeof(priv->wep_keys));
	memset(priv->wep_key_len, 0, sizeof(priv->wep_key_len));

	priv->default_beacon_period = priv->beacon_period = 100;
	priv->listen_interval = 1;

	init_timer(&priv->management_timer);
	spin_lock_init(&priv->irqlock);
	spin_lock_init(&priv->timerlock);
	priv->management_timer.function = atmel_management_timer;
	priv->management_timer.data = (unsigned long) dev;

	dev->open = atmel_open;
	dev->stop = atmel_close;
	dev->change_mtu = atmel_change_mtu;
	dev->set_mac_address = atmel_set_mac_address;
	dev->hard_start_xmit = start_tx;
	dev->get_stats = atmel_get_stats;
	dev->wireless_handlers = (struct iw_handler_def *)&atmel_handler_def;
	dev->do_ioctl = atmel_ioctl;
	dev->irq = irq;
	dev->base_addr = port;

	SET_NETDEV_DEV(dev, sys_dev);

	if ((rc = request_irq(dev->irq, service_interrupt, SA_SHIRQ, dev->name, dev))) {
		printk(KERN_ERR "%s: register interrupt %d failed, rc %d\n", dev->name, irq, rc);
		goto err_out_free;
	}

	if (!request_region(dev->base_addr, 32,
			    priv->bus_type == BUS_TYPE_PCCARD ?  "atmel_cs" : "atmel_pci")) {
		goto err_out_irq;
	}

	if (register_netdev(dev))
		goto err_out_res;

	if (!probe_atmel_card(dev)){
		unregister_netdev(dev);
		goto err_out_res;
	}

	netif_carrier_off(dev);

	ent = create_proc_read_entry ("driver/atmel", 0, NULL, atmel_read_proc, priv);
	if (!ent)
		printk(KERN_WARNING "atmel: unable to create /proc entry.\n");

	printk(KERN_INFO "%s: Atmel at76c50x. Version %d.%d. MAC %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
	       dev->name, DRIVER_MAJOR, DRIVER_MINOR,
	       dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
	       dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5] );

	SET_MODULE_OWNER(dev);
	return dev;

err_out_res:
	release_region( dev->base_addr, 32);
err_out_irq:
	free_irq(dev->irq, dev);
err_out_free:
	free_netdev(dev);
	return NULL;
}

EXPORT_SYMBOL(init_atmel_card);

void stop_atmel_card(struct net_device *dev)
{
	struct atmel_private *priv = netdev_priv(dev);

	/* put a brick on it... */
	if (priv->bus_type == BUS_TYPE_PCCARD)
		atmel_write16(dev, GCR, 0x0060);
	atmel_write16(dev, GCR, 0x0040);

	del_timer_sync(&priv->management_timer);
	unregister_netdev(dev);
	remove_proc_entry("driver/atmel", NULL);
	free_irq(dev->irq, dev);
	kfree(priv->firmware);
	release_region(dev->base_addr, 32);
	free_netdev(dev);
}

EXPORT_SYMBOL(stop_atmel_card);

static int atmel_set_essid(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_point *dwrq,
			   char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	/* Check if we asked for `any' */
	if(dwrq->flags == 0) {
		priv->connect_to_any_BSS = 1;
	} else {
		int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;

		priv->connect_to_any_BSS = 0;

		/* Check the size of the string */
		if (dwrq->length > MAX_SSID_LENGTH + 1)
			 return -E2BIG;
		if (index != 0)
			return -EINVAL;

		memcpy(priv->new_SSID, extra, dwrq->length - 1);
		priv->new_SSID_size = dwrq->length - 1;
	}

	return -EINPROGRESS;
}

static int atmel_get_essid(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_point *dwrq,
			   char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	/* Get the current SSID */
	if (priv->new_SSID_size != 0) {
		memcpy(extra, priv->new_SSID, priv->new_SSID_size);
		extra[priv->new_SSID_size] = '\0';
		dwrq->length = priv->new_SSID_size;
	} else {
		memcpy(extra, priv->SSID, priv->SSID_size);
		extra[priv->SSID_size] = '\0';
		dwrq->length = priv->SSID_size;
	}

	dwrq->flags = !priv->connect_to_any_BSS; /* active */

	return 0;
}

static int atmel_get_wap(struct net_device *dev,
			 struct iw_request_info *info,
			 struct sockaddr *awrq,
			 char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	memcpy(awrq->sa_data, priv->CurrentBSSID, 6);
	awrq->sa_family = ARPHRD_ETHER;

	return 0;
}

static int atmel_set_encode(struct net_device *dev,
			    struct iw_request_info *info,
			    struct iw_point *dwrq,
			    char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	/* Basic checking: do we have a key to set ?
	 * Note : with the new API, it's impossible to get a NULL pointer.
	 * Therefore, we need to check a key size == 0 instead.
	 * New version of iwconfig properly set the IW_ENCODE_NOKEY flag
	 * when no key is present (only change flags), but older versions
	 * don't do it. - Jean II */
	if (dwrq->length > 0) {
		int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
		int current_index = priv->default_key;
		/* Check the size of the key */
		if (dwrq->length > 13) {
			return -EINVAL;
		}
		/* Check the index (none -> use current) */
		if (index < 0 || index >= 4)
			index = current_index;
		else
			priv->default_key = index;
		/* Set the length */
		if (dwrq->length > 5)
			priv->wep_key_len[index] = 13;
		else
			if (dwrq->length > 0)
				priv->wep_key_len[index] = 5;
			else
				/* Disable the key */
				priv->wep_key_len[index] = 0;
		/* Check if the key is not marked as invalid */
		if(!(dwrq->flags & IW_ENCODE_NOKEY)) {
			/* Cleanup */
			memset(priv->wep_keys[index], 0, 13);
			/* Copy the key in the driver */
			memcpy(priv->wep_keys[index], extra, dwrq->length);
		}
		/* WE specify that if a valid key is set, encryption
		 * should be enabled (user may turn it off later)
		 * This is also how "iwconfig ethX key on" works */
		if (index == current_index &&
		    priv->wep_key_len[index] > 0) {
			priv->wep_is_on = 1;
			priv->exclude_unencrypted = 1;
			if (priv->wep_key_len[index] > 5) {
				priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
				priv->encryption_level = 2;
			} else {
				priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
				priv->encryption_level = 1;
			}
		}
	} else {
		/* Do we want to just set the transmit key index ? */
		int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
		if (index >= 0 && index < 4) {
			priv->default_key = index;
		} else
			/* Don't complain if only change the mode */
			if (!dwrq->flags & IW_ENCODE_MODE) {
				return -EINVAL;
			}
	}
	/* Read the flags */
	if (dwrq->flags & IW_ENCODE_DISABLED) {
		priv->wep_is_on = 0;
		priv->encryption_level = 0;
		priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
	} else {
		priv->wep_is_on = 1;
		if (priv->wep_key_len[priv->default_key] > 5) {
			priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
			priv->encryption_level = 2;
		} else {
			priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
			priv->encryption_level = 1;
		}
	}
	if (dwrq->flags & IW_ENCODE_RESTRICTED)
		priv->exclude_unencrypted = 1;
	if(dwrq->flags & IW_ENCODE_OPEN)
		priv->exclude_unencrypted = 0;

	return -EINPROGRESS;		/* Call commit handler */
}

static int atmel_get_encode(struct net_device *dev,
			    struct iw_request_info *info,
			    struct iw_point *dwrq,
			    char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;

	if (!priv->wep_is_on)
		dwrq->flags = IW_ENCODE_DISABLED;
	else {
		if (priv->exclude_unencrypted)
			dwrq->flags = IW_ENCODE_RESTRICTED;
		else
			dwrq->flags = IW_ENCODE_OPEN;
	}
		/* Which key do we want ? -1 -> tx index */
	if (index < 0 || index >= 4)
		index = priv->default_key;
	dwrq->flags |= index + 1;
	/* Copy the key to the user buffer */
	dwrq->length = priv->wep_key_len[index];
	if (dwrq->length > 16) {
		dwrq->length=0;
	} else {
		memset(extra, 0, 16);
		memcpy(extra, priv->wep_keys[index], dwrq->length);
	}

	return 0;
}

static int atmel_set_encodeext(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	struct iw_point *encoding = &wrqu->encoding;
	struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
	int idx, key_len, alg = ext->alg, set_key = 1;

	/* Determine and validate the key index */
	idx = encoding->flags & IW_ENCODE_INDEX;
	if (idx) {
		if (idx < 1 || idx > WEP_KEYS)
			return -EINVAL;
		idx--;
	} else
		idx = priv->default_key;

	if (encoding->flags & IW_ENCODE_DISABLED)
	    alg = IW_ENCODE_ALG_NONE;

	if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
		priv->default_key = idx;
		set_key = ext->key_len > 0 ? 1 : 0;
	}

	if (set_key) {
		/* Set the requested key first */
		switch (alg) {
		case IW_ENCODE_ALG_NONE:
			priv->wep_is_on = 0;
			priv->encryption_level = 0;
			priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
			break;
		case IW_ENCODE_ALG_WEP:
			if (ext->key_len > 5) {
				priv->wep_key_len[idx] = 13;
				priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
				priv->encryption_level = 2;
			} else if (ext->key_len > 0) {
				priv->wep_key_len[idx] = 5;
				priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
				priv->encryption_level = 1;
			} else {
				return -EINVAL;
			}
			priv->wep_is_on = 1;
			memset(priv->wep_keys[idx], 0, 13);
			key_len = min ((int)ext->key_len, priv->wep_key_len[idx]);
			memcpy(priv->wep_keys[idx], ext->key, key_len);
			break;
		default:
			return -EINVAL;
		}
	}

	return -EINPROGRESS;
}

static int atmel_get_encodeext(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	struct iw_point *encoding = &wrqu->encoding;
	struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
	int idx, max_key_len;

	max_key_len = encoding->length - sizeof(*ext);
	if (max_key_len < 0)
		return -EINVAL;

	idx = encoding->flags & IW_ENCODE_INDEX;
	if (idx) {
		if (idx < 1 || idx > WEP_KEYS)
			return -EINVAL;
		idx--;
	} else
		idx = priv->default_key;

	encoding->flags = idx + 1;
	memset(ext, 0, sizeof(*ext));
	
	if (!priv->wep_is_on) {
		ext->alg = IW_ENCODE_ALG_NONE;
		ext->key_len = 0;
		encoding->flags |= IW_ENCODE_DISABLED;
	} else {
		if (priv->encryption_level > 0)
			ext->alg = IW_ENCODE_ALG_WEP;
		else
			return -EINVAL;

		ext->key_len = priv->wep_key_len[idx];
		memcpy(ext->key, priv->wep_keys[idx], ext->key_len);
		encoding->flags |= IW_ENCODE_ENABLED;
	}

	return 0;
}

static int atmel_set_auth(struct net_device *dev,
			       struct iw_request_info *info,
			       union iwreq_data *wrqu, char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	struct iw_param *param = &wrqu->param;

	switch (param->flags & IW_AUTH_INDEX) {
	case IW_AUTH_WPA_VERSION:
	case IW_AUTH_CIPHER_PAIRWISE:
	case IW_AUTH_CIPHER_GROUP:
	case IW_AUTH_KEY_MGMT:
	case IW_AUTH_RX_UNENCRYPTED_EAPOL:
	case IW_AUTH_PRIVACY_INVOKED:
		/*
		 * atmel does not use these parameters
		 */
		break;

	case IW_AUTH_DROP_UNENCRYPTED:
		priv->exclude_unencrypted = param->value ? 1 : 0;
		break;

	case IW_AUTH_80211_AUTH_ALG: {
			if (param->value & IW_AUTH_ALG_SHARED_KEY) {
				priv->exclude_unencrypted = 1;
			} else if (param->value & IW_AUTH_ALG_OPEN_SYSTEM) {
				priv->exclude_unencrypted = 0;
			} else
				return -EINVAL;
			break;
		}

	case IW_AUTH_WPA_ENABLED:
		/* Silently accept disable of WPA */
		if (param->value > 0)
			return -EOPNOTSUPP;
		break;

	default:
		return -EOPNOTSUPP;
	}
	return -EINPROGRESS;
}

static int atmel_get_auth(struct net_device *dev,
			       struct iw_request_info *info,
			       union iwreq_data *wrqu, char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	struct iw_param *param = &wrqu->param;

	switch (param->flags & IW_AUTH_INDEX) {
	case IW_AUTH_DROP_UNENCRYPTED:
		param->value = priv->exclude_unencrypted;
		break;

	case IW_AUTH_80211_AUTH_ALG:
		if (priv->exclude_unencrypted == 1)
			param->value = IW_AUTH_ALG_SHARED_KEY;
		else
			param->value = IW_AUTH_ALG_OPEN_SYSTEM;
		break;

	case IW_AUTH_WPA_ENABLED:
		param->value = 0;
		break;

	default:
		return -EOPNOTSUPP;
	}
	return 0;
}


static int atmel_get_name(struct net_device *dev,
			  struct iw_request_info *info,
			  char *cwrq,
			  char *extra)
{
	strcpy(cwrq, "IEEE 802.11-DS");
	return 0;
}

static int atmel_set_rate(struct net_device *dev,
			  struct iw_request_info *info,
			  struct iw_param *vwrq,
			  char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	if (vwrq->fixed == 0) {
		priv->tx_rate = 3;
		priv->auto_tx_rate = 1;
	} else {
		priv->auto_tx_rate = 0;

		/* Which type of value ? */
		if ((vwrq->value < 4) && (vwrq->value >= 0)) {
			/* Setting by rate index */
			priv->tx_rate = vwrq->value;
		} else {
		/* Setting by frequency value */
			switch (vwrq->value) {
			case  1000000: priv->tx_rate = 0; break;
			case  2000000: priv->tx_rate = 1; break;
			case  5500000: priv->tx_rate = 2; break;
			case 11000000: priv->tx_rate = 3; break;
			default: return -EINVAL;
			}
		}
	}

	return -EINPROGRESS;
}

static int atmel_set_mode(struct net_device *dev,
			  struct iw_request_info *info,
			  __u32 *uwrq,
			  char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	if (*uwrq != IW_MODE_ADHOC && *uwrq != IW_MODE_INFRA)
		return -EINVAL;

	priv->operating_mode = *uwrq;
	return -EINPROGRESS;
}

static int atmel_get_mode(struct net_device *dev,
			  struct iw_request_info *info,
			  __u32 *uwrq,
			  char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	*uwrq = priv->operating_mode;
	return 0;
}

static int atmel_get_rate(struct net_device *dev,
			 struct iw_request_info *info,
			 struct iw_param *vwrq,
			 char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	if (priv->auto_tx_rate) {
		vwrq->fixed = 0;
		vwrq->value = 11000000;
	} else {
		vwrq->fixed = 1;
		switch(priv->tx_rate) {
		case 0: vwrq->value =  1000000; break;
		case 1: vwrq->value =  2000000; break;
		case 2: vwrq->value =  5500000; break;
		case 3: vwrq->value = 11000000; break;
		}
	}
	return 0;
}

static int atmel_set_power(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_param *vwrq,
			   char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	priv->power_mode = vwrq->disabled ? 0 : 1;
	return -EINPROGRESS;
}

static int atmel_get_power(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_param *vwrq,
			   char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	vwrq->disabled = priv->power_mode ? 0 : 1;
	vwrq->flags = IW_POWER_ON;
	return 0;
}

static int atmel_set_retry(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_param *vwrq,
			   char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	if (!vwrq->disabled && (vwrq->flags & IW_RETRY_LIMIT)) {
		if (vwrq->flags & IW_RETRY_MAX)
			priv->long_retry = vwrq->value;
		else if (vwrq->flags & IW_RETRY_MIN)
			priv->short_retry = vwrq->value;
		else {
			/* No modifier : set both */
			priv->long_retry = vwrq->value;
			priv->short_retry = vwrq->value;
		}
		return -EINPROGRESS;
	}

	return -EINVAL;
}

static int atmel_get_retry(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_param *vwrq,
			   char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	vwrq->disabled = 0;      /* Can't be disabled */

	/* Note : by default, display the min retry number */
	if (vwrq->flags & IW_RETRY_MAX) {
		vwrq->flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
		vwrq->value = priv->long_retry;
	} else {
		vwrq->flags = IW_RETRY_LIMIT;
		vwrq->value = priv->short_retry;
		if (priv->long_retry != priv->short_retry)
			vwrq->flags |= IW_RETRY_MIN;
	}

	return 0;
}

static int atmel_set_rts(struct net_device *dev,
			 struct iw_request_info *info,
			 struct iw_param *vwrq,
			 char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	int rthr = vwrq->value;

	if (vwrq->disabled)
		rthr = 2347;
	if ((rthr < 0) || (rthr > 2347)) {
		return -EINVAL;
	}
	priv->rts_threshold = rthr;

	return -EINPROGRESS;		/* Call commit handler */
}

static int atmel_get_rts(struct net_device *dev,
			 struct iw_request_info *info,
			 struct iw_param *vwrq,
			 char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	vwrq->value = priv->rts_threshold;
	vwrq->disabled = (vwrq->value >= 2347);
	vwrq->fixed = 1;

	return 0;
}

static int atmel_set_frag(struct net_device *dev,
			  struct iw_request_info *info,
			  struct iw_param *vwrq,
			  char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	int fthr = vwrq->value;

	if (vwrq->disabled)
		fthr = 2346;
	if ((fthr < 256) || (fthr > 2346)) {
		return -EINVAL;
	}
	fthr &= ~0x1;	/* Get an even value - is it really needed ??? */
	priv->frag_threshold = fthr;

	return -EINPROGRESS;		/* Call commit handler */
}

static int atmel_get_frag(struct net_device *dev,
			  struct iw_request_info *info,
			  struct iw_param *vwrq,
			  char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	vwrq->value = priv->frag_threshold;
	vwrq->disabled = (vwrq->value >= 2346);
	vwrq->fixed = 1;

	return 0;
}

static const long frequency_list[] = { 2412, 2417, 2422, 2427, 2432, 2437, 2442,
				2447, 2452, 2457, 2462, 2467, 2472, 2484 };

static int atmel_set_freq(struct net_device *dev,
			  struct iw_request_info *info,
			  struct iw_freq *fwrq,
			  char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	int rc = -EINPROGRESS;		/* Call commit handler */

	/* If setting by frequency, convert to a channel */
	if ((fwrq->e == 1) &&
	    (fwrq->m >= (int) 241200000) &&
	    (fwrq->m <= (int) 248700000)) {
		int f = fwrq->m / 100000;
		int c = 0;
		while ((c < 14) && (f != frequency_list[c]))
			c++;
		/* Hack to fall through... */
		fwrq->e = 0;
		fwrq->m = c + 1;
	}
	/* Setting by channel number */
	if ((fwrq->m > 1000) || (fwrq->e > 0))
		rc = -EOPNOTSUPP;
	else {
		int channel = fwrq->m;
		if (atmel_validate_channel(priv, channel) == 0) {
			priv->channel = channel;
		} else {
			rc = -EINVAL;
		}
	}
	return rc;
}

static int atmel_get_freq(struct net_device *dev,
			  struct iw_request_info *info,
			  struct iw_freq *fwrq,
			  char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	fwrq->m = priv->channel;
	fwrq->e = 0;
	return 0;
}

static int atmel_set_scan(struct net_device *dev,
			  struct iw_request_info *info,
			  struct iw_param *vwrq,
			  char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	unsigned long flags;

	/* Note : you may have realised that, as this is a SET operation,
	 * this is privileged and therefore a normal user can't
	 * perform scanning.
	 * This is not an error, while the device perform scanning,
	 * traffic doesn't flow, so it's a perfect DoS...
	 * Jean II */

	if (priv->station_state == STATION_STATE_DOWN)
		return -EAGAIN;

	/* Timeout old surveys. */
	if ((jiffies - priv->last_survey) > (20 * HZ))
		priv->site_survey_state = SITE_SURVEY_IDLE;
	priv->last_survey = jiffies;

	/* Initiate a scan command */
	if (priv->site_survey_state == SITE_SURVEY_IN_PROGRESS)
		return -EBUSY;

	del_timer_sync(&priv->management_timer);
	spin_lock_irqsave(&priv->irqlock, flags);

	priv->site_survey_state = SITE_SURVEY_IN_PROGRESS;
	priv->fast_scan = 0;
	atmel_scan(priv, 0);
	spin_unlock_irqrestore(&priv->irqlock, flags);

	return 0;
}

static int atmel_get_scan(struct net_device *dev,
			  struct iw_request_info *info,
			  struct iw_point *dwrq,
			  char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	int i;
	char *current_ev = extra;
	struct iw_event	iwe;

	if (priv->site_survey_state != SITE_SURVEY_COMPLETED)
		return -EAGAIN;

	for (i = 0; i < priv->BSS_list_entries; i++) {
		iwe.cmd = SIOCGIWAP;
		iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
		memcpy(iwe.u.ap_addr.sa_data, priv->BSSinfo[i].BSSID, 6);
		current_ev = iwe_stream_add_event(current_ev, extra + IW_SCAN_MAX_DATA, &iwe, IW_EV_ADDR_LEN);

		iwe.u.data.length =  priv->BSSinfo[i].SSIDsize;
		if (iwe.u.data.length > 32)
			iwe.u.data.length = 32;
		iwe.cmd = SIOCGIWESSID;
		iwe.u.data.flags = 1;
		current_ev = iwe_stream_add_point(current_ev, extra + IW_SCAN_MAX_DATA, &iwe, priv->BSSinfo[i].SSID);

		iwe.cmd = SIOCGIWMODE;
		iwe.u.mode = priv->BSSinfo[i].BSStype;
		current_ev = iwe_stream_add_event(current_ev, extra + IW_SCAN_MAX_DATA, &iwe, IW_EV_UINT_LEN);

		iwe.cmd = SIOCGIWFREQ;
		iwe.u.freq.m = priv->BSSinfo[i].channel;
		iwe.u.freq.e = 0;
		current_ev = iwe_stream_add_event(current_ev, extra + IW_SCAN_MAX_DATA, &iwe, IW_EV_FREQ_LEN);

		iwe.cmd = SIOCGIWENCODE;
		if (priv->BSSinfo[i].UsingWEP)
			iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
		else
			iwe.u.data.flags = IW_ENCODE_DISABLED;
		iwe.u.data.length = 0;
		current_ev = iwe_stream_add_point(current_ev, extra + IW_SCAN_MAX_DATA, &iwe, NULL);
	}

	/* Length of data */
	dwrq->length = (current_ev - extra);
	dwrq->flags = 0;

	return 0;
}

static int atmel_get_range(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_point *dwrq,
			   char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	struct iw_range *range = (struct iw_range *) extra;
	int k, i, j;

	dwrq->length = sizeof(struct iw_range);
	memset(range, 0, sizeof(struct iw_range));
	range->min_nwid = 0x0000;
	range->max_nwid = 0x0000;
	range->num_channels = 0;
	for (j = 0; j < sizeof(channel_table)/sizeof(channel_table[0]); j++)
		if (priv->reg_domain == channel_table[j].reg_domain) {
			range->num_channels = channel_table[j].max - channel_table[j].min + 1;
			break;
		}
	if (range->num_channels != 0) {
		for (k = 0, i = channel_table[j].min; i <= channel_table[j].max; i++) {
			range->freq[k].i = i; /* List index */
			range->freq[k].m = frequency_list[i - 1] * 100000;
			range->freq[k++].e = 1;	/* Values in table in MHz -> * 10^5 * 10 */
		}
		range->num_frequency = k;
	}

	range->max_qual.qual = 100;
	range->max_qual.level = 100;
	range->max_qual.noise = 0;
	range->max_qual.updated = IW_QUAL_NOISE_INVALID;

	range->avg_qual.qual = 50;
	range->avg_qual.level = 50;
	range->avg_qual.noise = 0;
	range->avg_qual.updated = IW_QUAL_NOISE_INVALID;

	range->sensitivity = 0;

	range->bitrate[0] =  1000000;
	range->bitrate[1] =  2000000;
	range->bitrate[2] =  5500000;
	range->bitrate[3] = 11000000;
	range->num_bitrates = 4;

	range->min_rts = 0;
	range->max_rts = 2347;
	range->min_frag = 256;
	range->max_frag = 2346;

	range->encoding_size[0] = 5;
	range->encoding_size[1] = 13;
	range->num_encoding_sizes = 2;
	range->max_encoding_tokens = 4;

	range->pmp_flags = IW_POWER_ON;
	range->pmt_flags = IW_POWER_ON;
	range->pm_capa = 0;

	range->we_version_source = WIRELESS_EXT;
	range->we_version_compiled = WIRELESS_EXT;
	range->retry_capa = IW_RETRY_LIMIT ;
	range->retry_flags = IW_RETRY_LIMIT;
	range->r_time_flags = 0;
	range->min_retry = 1;
	range->max_retry = 65535;

	return 0;
}

static int atmel_set_wap(struct net_device *dev,
			 struct iw_request_info *info,
			 struct sockaddr *awrq,
			 char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	int i;
	static const u8 any[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
	static const u8 off[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
	unsigned long flags;

	if (awrq->sa_family != ARPHRD_ETHER)
		return -EINVAL;

	if (!memcmp(any, awrq->sa_data, 6) ||
	    !memcmp(off, awrq->sa_data, 6)) {
		del_timer_sync(&priv->management_timer);
		spin_lock_irqsave(&priv->irqlock, flags);
		atmel_scan(priv, 1);
		spin_unlock_irqrestore(&priv->irqlock, flags);
		return 0;
	}

	for (i = 0; i < priv->BSS_list_entries; i++) {
		if (memcmp(priv->BSSinfo[i].BSSID, awrq->sa_data, 6) == 0) {
			if (!priv->wep_is_on && priv->BSSinfo[i].UsingWEP) {
				return -EINVAL;
			} else if  (priv->wep_is_on && !priv->BSSinfo[i].UsingWEP) {
				return -EINVAL;
			} else {
				del_timer_sync(&priv->management_timer);
				spin_lock_irqsave(&priv->irqlock, flags);
				atmel_join_bss(priv, i);
				spin_unlock_irqrestore(&priv->irqlock, flags);
				return 0;
			}
		}
	}

	return -EINVAL;
}

static int atmel_config_commit(struct net_device *dev,
			       struct iw_request_info *info,	/* NULL */
			       void *zwrq,			/* NULL */
			       char *extra)			/* NULL */
{
	return atmel_open(dev);
}

static const iw_handler atmel_handler[] =
{
	(iw_handler) atmel_config_commit,	/* SIOCSIWCOMMIT */
	(iw_handler) atmel_get_name,		/* SIOCGIWNAME */
	(iw_handler) NULL,			/* SIOCSIWNWID */
	(iw_handler) NULL,			/* SIOCGIWNWID */
	(iw_handler) atmel_set_freq,		/* SIOCSIWFREQ */
	(iw_handler) atmel_get_freq,		/* SIOCGIWFREQ */
	(iw_handler) atmel_set_mode,		/* SIOCSIWMODE */
	(iw_handler) atmel_get_mode,		/* SIOCGIWMODE */
	(iw_handler) NULL,			/* SIOCSIWSENS */
	(iw_handler) NULL,			/* SIOCGIWSENS */
	(iw_handler) NULL,			/* SIOCSIWRANGE */
	(iw_handler) atmel_get_range,           /* SIOCGIWRANGE */
	(iw_handler) NULL,			/* SIOCSIWPRIV */
	(iw_handler) NULL,			/* SIOCGIWPRIV */
	(iw_handler) NULL,			/* SIOCSIWSTATS */
	(iw_handler) NULL,			/* SIOCGIWSTATS */
	(iw_handler) NULL,			/* SIOCSIWSPY */
	(iw_handler) NULL,			/* SIOCGIWSPY */
	(iw_handler) NULL,			/* -- hole -- */
	(iw_handler) NULL,			/* -- hole -- */
	(iw_handler) atmel_set_wap,		/* SIOCSIWAP */
	(iw_handler) atmel_get_wap,		/* SIOCGIWAP */
	(iw_handler) NULL,			/* -- hole -- */
	(iw_handler) NULL,			/* SIOCGIWAPLIST */
	(iw_handler) atmel_set_scan,		/* SIOCSIWSCAN */
	(iw_handler) atmel_get_scan,		/* SIOCGIWSCAN */
	(iw_handler) atmel_set_essid,		/* SIOCSIWESSID */
	(iw_handler) atmel_get_essid,		/* SIOCGIWESSID */
	(iw_handler) NULL,			/* SIOCSIWNICKN */
	(iw_handler) NULL,			/* SIOCGIWNICKN */
	(iw_handler) NULL,			/* -- hole -- */
	(iw_handler) NULL,			/* -- hole -- */
	(iw_handler) atmel_set_rate,		/* SIOCSIWRATE */
	(iw_handler) atmel_get_rate,		/* SIOCGIWRATE */
	(iw_handler) atmel_set_rts,		/* SIOCSIWRTS */
	(iw_handler) atmel_get_rts,		/* SIOCGIWRTS */
	(iw_handler) atmel_set_frag,		/* SIOCSIWFRAG */
	(iw_handler) atmel_get_frag,		/* SIOCGIWFRAG */
	(iw_handler) NULL,			/* SIOCSIWTXPOW */
	(iw_handler) NULL,			/* SIOCGIWTXPOW */
	(iw_handler) atmel_set_retry,		/* SIOCSIWRETRY */
	(iw_handler) atmel_get_retry,		/* SIOCGIWRETRY */
	(iw_handler) atmel_set_encode,		/* SIOCSIWENCODE */
	(iw_handler) atmel_get_encode,		/* SIOCGIWENCODE */
	(iw_handler) atmel_set_power,		/* SIOCSIWPOWER */
	(iw_handler) atmel_get_power,		/* SIOCGIWPOWER */
	(iw_handler) NULL,			/* -- hole -- */
	(iw_handler) NULL,			/* -- hole -- */
	(iw_handler) NULL,			/* SIOCSIWGENIE */
	(iw_handler) NULL,			/* SIOCGIWGENIE */
	(iw_handler) atmel_set_auth,		/* SIOCSIWAUTH */
	(iw_handler) atmel_get_auth,		/* SIOCGIWAUTH */
	(iw_handler) atmel_set_encodeext,	/* SIOCSIWENCODEEXT */
	(iw_handler) atmel_get_encodeext,	/* SIOCGIWENCODEEXT */
	(iw_handler) NULL,			/* SIOCSIWPMKSA */
};

static const iw_handler atmel_private_handler[] =
{
	NULL,				/* SIOCIWFIRSTPRIV */
};

typedef struct atmel_priv_ioctl {
	char id[32];
	unsigned char __user *data;
	unsigned short len;
} atmel_priv_ioctl;

#define ATMELFWL	SIOCIWFIRSTPRIV
#define ATMELIDIFC	ATMELFWL + 1
#define ATMELRD		ATMELFWL + 2
#define ATMELMAGIC 0x51807
#define REGDOMAINSZ 20

static const struct iw_priv_args atmel_private_args[] = {
	{
		.cmd = ATMELFWL,
		.set_args = IW_PRIV_TYPE_BYTE
				| IW_PRIV_SIZE_FIXED
				| sizeof (atmel_priv_ioctl),
		.get_args = IW_PRIV_TYPE_NONE,
		.name = "atmelfwl"
	}, {
		.cmd = ATMELIDIFC,
		.set_args = IW_PRIV_TYPE_NONE,
		.get_args = IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1,
		.name = "atmelidifc"
	}, {
		.cmd = ATMELRD,
		.set_args = IW_PRIV_TYPE_CHAR | REGDOMAINSZ,
		.get_args = IW_PRIV_TYPE_NONE,
		.name = "regdomain"
	},
};

static const struct iw_handler_def atmel_handler_def =
{
	.num_standard	= sizeof(atmel_handler)/sizeof(iw_handler),
	.num_private	= sizeof(atmel_private_handler)/sizeof(iw_handler),
	.num_private_args = sizeof(atmel_private_args)/sizeof(struct iw_priv_args),
	.standard	= (iw_handler *) atmel_handler,
	.private	= (iw_handler *) atmel_private_handler,
	.private_args	= (struct iw_priv_args *) atmel_private_args,
	.get_wireless_stats = atmel_get_wireless_stats
};

static int atmel_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	int i, rc = 0;
	struct atmel_private *priv = netdev_priv(dev);
	atmel_priv_ioctl com;
	struct iwreq *wrq = (struct iwreq *) rq;
	unsigned char *new_firmware;
	char domain[REGDOMAINSZ + 1];

	switch (cmd) {
	case ATMELIDIFC:
		wrq->u.param.value = ATMELMAGIC;
		break;

	case ATMELFWL:
		if (copy_from_user(&com, rq->ifr_data, sizeof(com))) {
			rc = -EFAULT;
			break;
		}

		if (!capable(CAP_NET_ADMIN)) {
			rc = -EPERM;
			break;
		}

		if (!(new_firmware = kmalloc(com.len, GFP_KERNEL))) {
			rc = -ENOMEM;
			break;
		}

		if (copy_from_user(new_firmware, com.data, com.len)) {
			kfree(new_firmware);
			rc = -EFAULT;
			break;
		}

		kfree(priv->firmware);

		priv->firmware = new_firmware;
		priv->firmware_length = com.len;
		strncpy(priv->firmware_id, com.id, 31);
		priv->firmware_id[31] = '\0';
		break;

	case ATMELRD:
		if (copy_from_user(domain, rq->ifr_data, REGDOMAINSZ)) {
			rc = -EFAULT;
			break;
		}

		if (!capable(CAP_NET_ADMIN)) {
			rc = -EPERM;
			break;
		}

		domain[REGDOMAINSZ] = 0;
		rc = -EINVAL;
		for (i = 0; i < sizeof(channel_table)/sizeof(channel_table[0]); i++) {
			/* strcasecmp doesn't exist in the library */
			char *a = channel_table[i].name;
			char *b = domain;
			while (*a) {
				char c1 = *a++;
				char c2 = *b++;
				if (tolower(c1) != tolower(c2))
					break;
			}
			if (!*a && !*b) {
				priv->config_reg_domain = channel_table[i].reg_domain;
				rc = 0;
			}
		}

		if (rc == 0 &&  priv->station_state != STATION_STATE_DOWN)
			rc = atmel_open(dev);
		break;

	default:
		rc = -EOPNOTSUPP;
	}

	return rc;
}

struct auth_body {
	u16 alg;
	u16 trans_seq;
	u16 status;
	u8 el_id;
	u8 chall_text_len;
	u8 chall_text[253];
};

static void atmel_enter_state(struct atmel_private *priv, int new_state)
{
	int old_state = priv->station_state;

	if (new_state == old_state)
		return;

	priv->station_state = new_state;

	if (new_state == STATION_STATE_READY) {
		netif_start_queue(priv->dev);
		netif_carrier_on(priv->dev);
	}

	if (old_state == STATION_STATE_READY) {
		netif_carrier_off(priv->dev);
		if (netif_running(priv->dev))
			netif_stop_queue(priv->dev);
		priv->last_beacon_timestamp = 0;
	}
}

static void atmel_scan(struct atmel_private *priv, int specific_ssid)
{
	struct {
		u8 BSSID[6];
		u8 SSID[MAX_SSID_LENGTH];
		u8 scan_type;
		u8 channel;
		u16 BSS_type;
		u16 min_channel_time;
		u16 max_channel_time;
		u8 options;
		u8 SSID_size;
	} cmd;

	memset(cmd.BSSID, 0xff, 6);

	if (priv->fast_scan) {
		cmd.SSID_size = priv->SSID_size;
		memcpy(cmd.SSID, priv->SSID, priv->SSID_size);
		cmd.min_channel_time = cpu_to_le16(10);
		cmd.max_channel_time = cpu_to_le16(50);
	} else {
		priv->BSS_list_entries = 0;
		cmd.SSID_size = 0;
		cmd.min_channel_time = cpu_to_le16(10);
		cmd.max_channel_time = cpu_to_le16(120);
	}

	cmd.options = 0;

	if (!specific_ssid)
		cmd.options |= SCAN_OPTIONS_SITE_SURVEY;

	cmd.channel = (priv->channel & 0x7f);
	cmd.scan_type = SCAN_TYPE_ACTIVE;
	cmd.BSS_type = cpu_to_le16(priv->operating_mode == IW_MODE_ADHOC ?
		BSS_TYPE_AD_HOC : BSS_TYPE_INFRASTRUCTURE);

	atmel_send_command(priv, CMD_Scan, &cmd, sizeof(cmd));

	/* This must come after all hardware access to avoid being messed up
	   by stuff happening in interrupt context after we leave STATE_DOWN */
	atmel_enter_state(priv, STATION_STATE_SCANNING);
}

static void join(struct atmel_private *priv, int type)
{
	struct {
		u8 BSSID[6];
		u8 SSID[MAX_SSID_LENGTH];
		u8 BSS_type; /* this is a short in a scan command - weird */
		u8 channel;
		u16 timeout;
		u8 SSID_size;
		u8 reserved;
	} cmd;

	cmd.SSID_size = priv->SSID_size;
	memcpy(cmd.SSID, priv->SSID, priv->SSID_size);
	memcpy(cmd.BSSID, priv->CurrentBSSID, 6);
	cmd.channel = (priv->channel & 0x7f);
	cmd.BSS_type = type;
	cmd.timeout = cpu_to_le16(2000);

	atmel_send_command(priv, CMD_Join, &cmd, sizeof(cmd));
}

static void start(struct atmel_private *priv, int type)
{
	struct {
		u8 BSSID[6];
		u8 SSID[MAX_SSID_LENGTH];
		u8 BSS_type;
		u8 channel;
		u8 SSID_size;
		u8 reserved[3];
	} cmd;

	cmd.SSID_size = priv->SSID_size;
	memcpy(cmd.SSID, priv->SSID, priv->SSID_size);
	memcpy(cmd.BSSID, priv->BSSID, 6);
	cmd.BSS_type = type;
	cmd.channel = (priv->channel & 0x7f);

	atmel_send_command(priv, CMD_Start, &cmd, sizeof(cmd));
}

static void handle_beacon_probe(struct atmel_private *priv, u16 capability,
				u8 channel)
{
	int rejoin = 0;
	int new = capability  & C80211_MGMT_CAPABILITY_ShortPreamble ?
		SHORT_PREAMBLE : LONG_PREAMBLE;

	if (priv->preamble != new) {
		priv->preamble = new;
		rejoin = 1;
		atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_PREAMBLE_TYPE, new);
	}

	if (priv->channel != channel) {
		priv->channel = channel;
		rejoin = 1;
		atmel_set_mib8(priv, Phy_Mib_Type, PHY_MIB_CHANNEL_POS, channel);
	}

	if (rejoin) {
		priv->station_is_associated = 0;
		atmel_enter_state(priv, STATION_STATE_JOINNING);

		if (priv->operating_mode == IW_MODE_INFRA)
			join(priv, BSS_TYPE_INFRASTRUCTURE);
		else
			join(priv, BSS_TYPE_AD_HOC);
	}
}

static void send_authentication_request(struct atmel_private *priv, u16 system,
					u8 *challenge, int challenge_len)
{
	struct ieee80211_hdr_4addr header;
	struct auth_body auth;

	header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
	header.duration_id = cpu_to_le16(0x8000);
	header.seq_ctl = 0;
	memcpy(header.addr1, priv->CurrentBSSID, 6);
	memcpy(header.addr2, priv->dev->dev_addr, 6);
	memcpy(header.addr3, priv->CurrentBSSID, 6);

	if (priv->wep_is_on && priv->CurrentAuthentTransactionSeqNum != 1)
		/* no WEP for authentication frames with TrSeqNo 1 */
                header.frame_ctl |=  cpu_to_le16(IEEE80211_FCTL_PROTECTED);

	auth.alg = cpu_to_le16(system);

	auth.status = 0;
	auth.trans_seq = cpu_to_le16(priv->CurrentAuthentTransactionSeqNum);
	priv->ExpectedAuthentTransactionSeqNum = priv->CurrentAuthentTransactionSeqNum+1;
	priv->CurrentAuthentTransactionSeqNum += 2;

	if (challenge_len != 0)	{
		auth.el_id = 16; /* challenge_text */
		auth.chall_text_len = challenge_len;
		memcpy(auth.chall_text, challenge, challenge_len);
		atmel_transmit_management_frame(priv, &header, (u8 *)&auth, 8 + challenge_len);
	} else {
		atmel_transmit_management_frame(priv, &header, (u8 *)&auth, 6);
	}
}

static void send_association_request(struct atmel_private *priv, int is_reassoc)
{
	u8 *ssid_el_p;
	int bodysize;
	struct ieee80211_hdr_4addr header;
	struct ass_req_format {
		u16 capability;
		u16 listen_interval;
		u8 ap[6]; /* nothing after here directly accessible */
		u8 ssid_el_id;
		u8 ssid_len;
		u8 ssid[MAX_SSID_LENGTH];
		u8 sup_rates_el_id;
		u8 sup_rates_len;
		u8 rates[4];
	} body;

	header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_MGMT |
		(is_reassoc ? IEEE80211_STYPE_REASSOC_REQ : IEEE80211_STYPE_ASSOC_REQ));
	header.duration_id = cpu_to_le16(0x8000);
	header.seq_ctl = 0;

	memcpy(header.addr1, priv->CurrentBSSID, 6);
	memcpy(header.addr2, priv->dev->dev_addr, 6);
	memcpy(header.addr3, priv->CurrentBSSID, 6);

	body.capability = cpu_to_le16(C80211_MGMT_CAPABILITY_ESS);
	if (priv->wep_is_on)
		body.capability |= cpu_to_le16(C80211_MGMT_CAPABILITY_Privacy);
	if (priv->preamble == SHORT_PREAMBLE)
		body.capability |= cpu_to_le16(C80211_MGMT_CAPABILITY_ShortPreamble);

	body.listen_interval = cpu_to_le16(priv->listen_interval * priv->beacon_period);

	/* current AP address - only in reassoc frame */
	if (is_reassoc) {
		memcpy(body.ap, priv->CurrentBSSID, 6);
		ssid_el_p = (u8 *)&body.ssid_el_id;
		bodysize = 18 + priv->SSID_size;
	} else {
		ssid_el_p = (u8 *)&body.ap[0];
		bodysize = 12 + priv->SSID_size;
	}

	ssid_el_p[0] = C80211_MGMT_ElementID_SSID;
	ssid_el_p[1] = priv->SSID_size;
	memcpy(ssid_el_p + 2, priv->SSID, priv->SSID_size);
	ssid_el_p[2 + priv->SSID_size] = C80211_MGMT_ElementID_SupportedRates;
	ssid_el_p[3 + priv->SSID_size] = 4; /* len of suported rates */
	memcpy(ssid_el_p + 4 + priv->SSID_size, atmel_basic_rates, 4);

	atmel_transmit_management_frame(priv, &header, (void *)&body, bodysize);
}

static int is_frame_from_current_bss(struct atmel_private *priv,
				     struct ieee80211_hdr_4addr *header)
{
	if (le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_FROMDS)
		return memcmp(header->addr3, priv->CurrentBSSID, 6) == 0;
	else
		return memcmp(header->addr2, priv->CurrentBSSID, 6) == 0;
}

static int retrieve_bss(struct atmel_private *priv)
{
	int i;
	int max_rssi = -128;
	int max_index = -1;

	if (priv->BSS_list_entries == 0)
		return -1;

	if (priv->connect_to_any_BSS) {
		/* Select a BSS with the max-RSSI but of the same type and of
		   the same WEP mode and that it is not marked as 'bad' (i.e.
		   we had previously failed to connect to this BSS with the
		   settings that we currently use) */
		priv->current_BSS = 0;
		for (i = 0; i < priv->BSS_list_entries; i++) {
			if (priv->operating_mode == priv->BSSinfo[i].BSStype &&
			    ((!priv->wep_is_on && !priv->BSSinfo[i].UsingWEP) ||
			     (priv->wep_is_on && priv->BSSinfo[i].UsingWEP)) &&
			    !(priv->BSSinfo[i].channel & 0x80)) {
				max_rssi = priv->BSSinfo[i].RSSI;
				priv->current_BSS = max_index = i;
			}
		}
		return max_index;
	}

	for (i = 0; i < priv->BSS_list_entries; i++) {
		if (priv->SSID_size == priv->BSSinfo[i].SSIDsize &&
		    memcmp(priv->SSID, priv->BSSinfo[i].SSID, priv->SSID_size) == 0 &&
		    priv->operating_mode == priv->BSSinfo[i].BSStype &&
		    atmel_validate_channel(priv, priv->BSSinfo[i].channel) == 0) {
			if (priv->BSSinfo[i].RSSI >= max_rssi) {
				max_rssi = priv->BSSinfo[i].RSSI;
				max_index = i;
			}
		}
	}
	return max_index;
}

static void store_bss_info(struct atmel_private *priv,
			   struct ieee80211_hdr_4addr *header, u16 capability,
			   u16 beacon_period, u8 channel, u8 rssi, u8 ssid_len,
			   u8 *ssid, int is_beacon)
{
	u8 *bss = capability & C80211_MGMT_CAPABILITY_ESS ? header->addr2 : header->addr3;
	int i, index;

	for (index = -1, i = 0; i < priv->BSS_list_entries; i++)
		if (memcmp(bss, priv->BSSinfo[i].BSSID, 6) == 0)
			index = i;

        /* If we process a probe and an entry from this BSS exists
	   we will update the BSS entry with the info from this BSS.
	   If we process a beacon we will only update RSSI */

	if (index == -1) {
		if (priv->BSS_list_entries == MAX_BSS_ENTRIES)
			return;
		index = priv->BSS_list_entries++;
		memcpy(priv->BSSinfo[index].BSSID, bss, 6);
		priv->BSSinfo[index].RSSI = rssi;
	} else {
		if (rssi > priv->BSSinfo[index].RSSI)
			priv->BSSinfo[index].RSSI = rssi;
		if (is_beacon)
			return;
	}

	priv->BSSinfo[index].channel = channel;
	priv->BSSinfo[index].beacon_period = beacon_period;
	priv->BSSinfo[index].UsingWEP = capability & C80211_MGMT_CAPABILITY_Privacy;
	memcpy(priv->BSSinfo[index].SSID, ssid, ssid_len);
	priv->BSSinfo[index].SSIDsize = ssid_len;

	if (capability & C80211_MGMT_CAPABILITY_IBSS)
		priv->BSSinfo[index].BSStype = IW_MODE_ADHOC;
	else if (capability & C80211_MGMT_CAPABILITY_ESS)
		priv->BSSinfo[index].BSStype =IW_MODE_INFRA;

	priv->BSSinfo[index].preamble = capability & C80211_MGMT_CAPABILITY_ShortPreamble ?
		SHORT_PREAMBLE : LONG_PREAMBLE;
}

static void authenticate(struct atmel_private *priv, u16 frame_len)
{
	struct auth_body *auth = (struct auth_body *)priv->rx_buf;
	u16 status = le16_to_cpu(auth->status);
	u16 trans_seq_no = le16_to_cpu(auth->trans_seq);
	u16 system = le16_to_cpu(auth->alg);

	if (status == C80211_MGMT_SC_Success && !priv->wep_is_on) {
		/* no WEP */
		if (priv->station_was_associated) {
			atmel_enter_state(priv, STATION_STATE_REASSOCIATING);
			send_association_request(priv, 1);
			return;
		} else {
			atmel_enter_state(priv, STATION_STATE_ASSOCIATING);
			send_association_request(priv, 0);
			return;
		}
	}

	if (status == C80211_MGMT_SC_Success && priv->wep_is_on) {
		int should_associate = 0;
		/* WEP */
		if (trans_seq_no != priv->ExpectedAuthentTransactionSeqNum)
			return;

		if (system == C80211_MGMT_AAN_OPENSYSTEM) {
			if (trans_seq_no == 0x0002) {
				should_associate = 1;
			}
		} else if (system == C80211_MGMT_AAN_SHAREDKEY) {
			if (trans_seq_no == 0x0002 &&
			    auth->el_id == C80211_MGMT_ElementID_ChallengeText) {
				send_authentication_request(priv, system, auth->chall_text, auth->chall_text_len);
				return;
			} else if (trans_seq_no == 0x0004) {
				should_associate = 1;
			}
		}

		if (should_associate) {
			if(priv->station_was_associated) {
				atmel_enter_state(priv, STATION_STATE_REASSOCIATING);
				send_association_request(priv, 1);
				return;
			} else {
				atmel_enter_state(priv, STATION_STATE_ASSOCIATING);
				send_association_request(priv, 0);
				return;
			}
		}
	}

	if (status == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
		/* Do opensystem first, then try sharedkey */
		if (system == WLAN_AUTH_OPEN) {
			priv->CurrentAuthentTransactionSeqNum = 0x001;
			priv->exclude_unencrypted = 1;
			send_authentication_request(priv, WLAN_AUTH_SHARED_KEY, NULL, 0);
			return;
		} else if (priv->connect_to_any_BSS) {
			int bss_index;

			priv->BSSinfo[(int)(priv->current_BSS)].channel |= 0x80;

			if ((bss_index  = retrieve_bss(priv)) != -1) {
				atmel_join_bss(priv, bss_index);
				return;
			}
		}
	}

	priv->AuthenticationRequestRetryCnt = 0;
	atmel_enter_state(priv,  STATION_STATE_MGMT_ERROR);
	priv->station_is_associated = 0;
}

static void associate(struct atmel_private *priv, u16 frame_len, u16 subtype)
{
	struct ass_resp_format {
		u16 capability;
		u16 status;
		u16 ass_id;
		u8 el_id;
		u8 length;
		u8 rates[4];
	} *ass_resp = (struct ass_resp_format *)priv->rx_buf;

	u16 status = le16_to_cpu(ass_resp->status);
	u16 ass_id = le16_to_cpu(ass_resp->ass_id);
	u16 rates_len = ass_resp->length > 4 ? 4 : ass_resp->length;

	union iwreq_data wrqu;

	if (frame_len < 8 + rates_len)
		return;

	if (status == C80211_MGMT_SC_Success) {
		if (subtype == C80211_SUBTYPE_MGMT_ASS_RESPONSE)
			priv->AssociationRequestRetryCnt = 0;
		else
			priv->ReAssociationRequestRetryCnt = 0;

		atmel_set_mib16(priv, Mac_Mgmt_Mib_Type,
				MAC_MGMT_MIB_STATION_ID_POS, ass_id & 0x3fff);
		atmel_set_mib(priv, Phy_Mib_Type,
			      PHY_MIB_RATE_SET_POS, ass_resp->rates, rates_len);
		if (priv->power_mode == 0) {
			priv->listen_interval = 1;
			atmel_set_mib8(priv, Mac_Mgmt_Mib_Type,
				       MAC_MGMT_MIB_PS_MODE_POS, ACTIVE_MODE);
			atmel_set_mib16(priv, Mac_Mgmt_Mib_Type,
					MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 1);
		} else {
			priv->listen_interval = 2;
			atmel_set_mib8(priv, Mac_Mgmt_Mib_Type,
				       MAC_MGMT_MIB_PS_MODE_POS,  PS_MODE);
			atmel_set_mib16(priv, Mac_Mgmt_Mib_Type,
					MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 2);
		}

		priv->station_is_associated = 1;
		priv->station_was_associated = 1;
		atmel_enter_state(priv, STATION_STATE_READY);

		/* Send association event to userspace */
		wrqu.data.length = 0;
		wrqu.data.flags = 0;
		memcpy(wrqu.ap_addr.sa_data, priv->CurrentBSSID, ETH_ALEN);
		wrqu.ap_addr.sa_family = ARPHRD_ETHER;
		wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);

		return;
	}

	if (subtype == C80211_SUBTYPE_MGMT_ASS_RESPONSE &&
	    status != C80211_MGMT_SC_AssDeniedBSSRate &&
	    status != C80211_MGMT_SC_SupportCapabilities &&
	    priv->AssociationRequestRetryCnt < MAX_ASSOCIATION_RETRIES) {
		mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
		priv->AssociationRequestRetryCnt++;
		send_association_request(priv, 0);
		return;
	}

	if (subtype == C80211_SUBTYPE_MGMT_REASS_RESPONSE &&
	    status != C80211_MGMT_SC_AssDeniedBSSRate &&
	    status != C80211_MGMT_SC_SupportCapabilities &&
	    priv->AssociationRequestRetryCnt < MAX_ASSOCIATION_RETRIES) {
		mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
		priv->ReAssociationRequestRetryCnt++;
		send_association_request(priv, 1);
		return;
	}

	atmel_enter_state(priv,  STATION_STATE_MGMT_ERROR);
	priv->station_is_associated = 0;

	if (priv->connect_to_any_BSS) {
		int bss_index;
		priv->BSSinfo[(int)(priv->current_BSS)].channel |= 0x80;

		if ((bss_index = retrieve_bss(priv)) != -1)
			atmel_join_bss(priv, bss_index);
	}
}

void atmel_join_bss(struct atmel_private *priv, int bss_index)
{
	struct bss_info *bss =  &priv->BSSinfo[bss_index];

	memcpy(priv->CurrentBSSID, bss->BSSID, 6);
	memcpy(priv->SSID, bss->SSID, priv->SSID_size = bss->SSIDsize);

	/* The WPA stuff cares about the current AP address */
	if (priv->use_wpa)
		build_wpa_mib(priv);

	/* When switching to AdHoc turn OFF Power Save if needed */

	if (bss->BSStype == IW_MODE_ADHOC &&
	    priv->operating_mode != IW_MODE_ADHOC &&
	    priv->power_mode) {
		priv->power_mode = 0;
		priv->listen_interval = 1;
		atmel_set_mib8(priv, Mac_Mgmt_Mib_Type,
			       MAC_MGMT_MIB_PS_MODE_POS,  ACTIVE_MODE);
		atmel_set_mib16(priv, Mac_Mgmt_Mib_Type,
				MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 1);
	}

	priv->operating_mode = bss->BSStype;
	priv->channel = bss->channel & 0x7f;
	priv->beacon_period = bss->beacon_period;

	if (priv->preamble != bss->preamble) {
		priv->preamble = bss->preamble;
		atmel_set_mib8(priv, Local_Mib_Type,
			       LOCAL_MIB_PREAMBLE_TYPE, bss->preamble);
	}

	if (!priv->wep_is_on && bss->UsingWEP) {
		atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
		priv->station_is_associated = 0;
		return;
	}

	if (priv->wep_is_on && !bss->UsingWEP) {
		atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
		priv->station_is_associated = 0;
		return;
	}

	atmel_enter_state(priv, STATION_STATE_JOINNING);

	if (priv->operating_mode == IW_MODE_INFRA)
		join(priv, BSS_TYPE_INFRASTRUCTURE);
	else
		join(priv, BSS_TYPE_AD_HOC);
}

static void restart_search(struct atmel_private *priv)
{
	int bss_index;

	if (!priv->connect_to_any_BSS) {
		atmel_scan(priv, 1);
	} else {
		priv->BSSinfo[(int)(priv->current_BSS)].channel |= 0x80;

		if ((bss_index = retrieve_bss(priv)) != -1)
			atmel_join_bss(priv, bss_index);
		else
			atmel_scan(priv, 0);
	}
}

static void smooth_rssi(struct atmel_private *priv, u8 rssi)
{
	u8 old = priv->wstats.qual.level;
	u8 max_rssi = 42; /* 502-rmfd-revd max by experiment, default for now */

	switch (priv->firmware_type) {
		case ATMEL_FW_TYPE_502E:
			max_rssi = 63; /* 502-rmfd-reve max by experiment */
			break;
		default:
			break;
	}

	rssi = rssi * 100 / max_rssi;
	if ((rssi + old) % 2)
		priv->wstats.qual.level = (rssi + old) / 2 + 1;
	else
		priv->wstats.qual.level = (rssi + old) / 2;
	priv->wstats.qual.updated |= IW_QUAL_LEVEL_UPDATED;
	priv->wstats.qual.updated &= ~IW_QUAL_LEVEL_INVALID;
}

static void atmel_smooth_qual(struct atmel_private *priv)
{
	unsigned long time_diff = (jiffies - priv->last_qual) / HZ;
	while (time_diff--) {
		priv->last_qual += HZ;
		priv->wstats.qual.qual = priv->wstats.qual.qual / 2;
		priv->wstats.qual.qual +=
			priv->beacons_this_sec * priv->beacon_period * (priv->wstats.qual.level + 100) / 4000;
		priv->beacons_this_sec = 0;
	}
	priv->wstats.qual.updated |= IW_QUAL_QUAL_UPDATED;
	priv->wstats.qual.updated &= ~IW_QUAL_QUAL_INVALID;
}

/* deals with incoming managment frames. */
static void atmel_management_frame(struct atmel_private *priv,
				   struct ieee80211_hdr_4addr *header,
				   u16 frame_len, u8 rssi)
{
	u16 subtype;

	subtype = le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_STYPE;
	switch (subtype) {
	case C80211_SUBTYPE_MGMT_BEACON:
	case C80211_SUBTYPE_MGMT_ProbeResponse:

		/* beacon frame has multiple variable-length fields -
		   never let an engineer loose with a data structure design. */
		{
			struct beacon_format {
				u64 timestamp;
				u16 interval;
				u16 capability;
				u8 ssid_el_id;
				u8 ssid_length;
				/* ssid here */
				u8 rates_el_id;
				u8 rates_length;
				/* rates here */
				u8 ds_el_id;
				u8 ds_length;
				/* ds here */
			} *beacon = (struct beacon_format *)priv->rx_buf;

			u8 channel, rates_length, ssid_length;
			u64 timestamp = le64_to_cpu(beacon->timestamp);
			u16 beacon_interval = le16_to_cpu(beacon->interval);
			u16 capability = le16_to_cpu(beacon->capability);
			u8 *beaconp = priv->rx_buf;
			ssid_length = beacon->ssid_length;
			/* this blows chunks. */
			if (frame_len < 14 || frame_len < ssid_length + 15)
				return;
			rates_length = beaconp[beacon->ssid_length + 15];
			if (frame_len < ssid_length + rates_length + 18)
				return;
			if (ssid_length >  MAX_SSID_LENGTH)
				return;
			channel = beaconp[ssid_length + rates_length + 18];

			if (priv->station_state == STATION_STATE_READY) {
				smooth_rssi(priv, rssi);
				if (is_frame_from_current_bss(priv, header)) {
					priv->beacons_this_sec++;
					atmel_smooth_qual(priv);
					if (priv->last_beacon_timestamp) {
						/* Note truncate this to 32 bits - kernel can't divide a long long */
						u32 beacon_delay = timestamp - priv->last_beacon_timestamp;
						int beacons = beacon_delay / (beacon_interval * 1000);
						if (beacons > 1)
							priv->wstats.miss.beacon += beacons - 1;
					}
					priv->last_beacon_timestamp = timestamp;
					handle_beacon_probe(priv, capability, channel);
				}
			}

			if (priv->station_state == STATION_STATE_SCANNING)
				store_bss_info(priv, header, capability,
					       beacon_interval, channel, rssi,
					       ssid_length,
					       &beacon->rates_el_id,
					       subtype == C80211_SUBTYPE_MGMT_BEACON);
		}
		break;

	case C80211_SUBTYPE_MGMT_Authentication:

		if (priv->station_state == STATION_STATE_AUTHENTICATING)
			authenticate(priv, frame_len);

		break;

	case C80211_SUBTYPE_MGMT_ASS_RESPONSE:
	case C80211_SUBTYPE_MGMT_REASS_RESPONSE:

		if (priv->station_state == STATION_STATE_ASSOCIATING ||
		    priv->station_state == STATION_STATE_REASSOCIATING)
			associate(priv, frame_len, subtype);

		break;

	case C80211_SUBTYPE_MGMT_DISASSOSIATION:
		if (priv->station_is_associated &&
		    priv->operating_mode == IW_MODE_INFRA &&
		    is_frame_from_current_bss(priv, header)) {
			priv->station_was_associated = 0;
			priv->station_is_associated = 0;

			atmel_enter_state(priv, STATION_STATE_JOINNING);
			join(priv, BSS_TYPE_INFRASTRUCTURE);
		}

		break;

	case C80211_SUBTYPE_MGMT_Deauthentication:
		if (priv->operating_mode == IW_MODE_INFRA &&
		    is_frame_from_current_bss(priv, header)) {
			priv->station_was_associated = 0;

			atmel_enter_state(priv, STATION_STATE_JOINNING);
			join(priv, BSS_TYPE_INFRASTRUCTURE);
		}

		break;
	}
}

/* run when timer expires */
static void atmel_management_timer(u_long a)
{
	struct net_device *dev = (struct net_device *) a;
	struct atmel_private *priv = netdev_priv(dev);
	unsigned long flags;

	/* Check if the card has been yanked. */
	if (priv->card && priv->present_callback &&
		!(*priv->present_callback)(priv->card))
		return;

	spin_lock_irqsave(&priv->irqlock, flags);

	switch (priv->station_state) {

	case STATION_STATE_AUTHENTICATING:
		if (priv->AuthenticationRequestRetryCnt >= MAX_AUTHENTICATION_RETRIES) {
			atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
			priv->station_is_associated = 0;
			priv->AuthenticationRequestRetryCnt = 0;
			restart_search(priv);
		} else {
			int auth = C80211_MGMT_AAN_OPENSYSTEM;
			priv->AuthenticationRequestRetryCnt++;
			priv->CurrentAuthentTransactionSeqNum = 0x0001;
			mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
			if (priv->wep_is_on && priv->exclude_unencrypted)
				auth = C80211_MGMT_AAN_SHAREDKEY;
			send_authentication_request(priv, auth, NULL, 0);
	  }
	  break;

	case STATION_STATE_ASSOCIATING:
		if (priv->AssociationRequestRetryCnt == MAX_ASSOCIATION_RETRIES) {
			atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
			priv->station_is_associated = 0;
			priv->AssociationRequestRetryCnt = 0;
			restart_search(priv);
		} else {
			priv->AssociationRequestRetryCnt++;
			mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
			send_association_request(priv, 0);
		}
	  break;

	case STATION_STATE_REASSOCIATING:
		if (priv->ReAssociationRequestRetryCnt == MAX_ASSOCIATION_RETRIES) {
			atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
			priv->station_is_associated = 0;
			priv->ReAssociationRequestRetryCnt = 0;
			restart_search(priv);
		} else {
			priv->ReAssociationRequestRetryCnt++;
			mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
			send_association_request(priv, 1);
		}
		break;

	default:
		break;
	}

	spin_unlock_irqrestore(&priv->irqlock, flags);
}

static void atmel_command_irq(struct atmel_private *priv)
{
	u8 status = atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_STATUS_OFFSET));
	u8 command = atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_COMMAND_OFFSET));
	int fast_scan;

	if (status == CMD_STATUS_IDLE ||
	    status == CMD_STATUS_IN_PROGRESS)
		return;

	switch (command){

	case CMD_Start:
		if (status == CMD_STATUS_COMPLETE) {
			priv->station_was_associated = priv->station_is_associated;
			atmel_get_mib(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_CUR_BSSID_POS,
				      (u8 *)priv->CurrentBSSID, 6);
			atmel_enter_state(priv, STATION_STATE_READY);
		}
		break;

	case CMD_Scan:
		fast_scan = priv->fast_scan;
		priv->fast_scan = 0;

		if (status != CMD_STATUS_COMPLETE) {
			atmel_scan(priv, 1);
		} else {
			int bss_index = retrieve_bss(priv);
			if (bss_index != -1) {
				atmel_join_bss(priv, bss_index);
			} else if (priv->operating_mode == IW_MODE_ADHOC &&
				   priv->SSID_size != 0) {
				start(priv, BSS_TYPE_AD_HOC);
			} else {
				priv->fast_scan = !fast_scan;
				atmel_scan(priv, 1);
			}
			priv->site_survey_state = SITE_SURVEY_COMPLETED;
		}
		break;

	case CMD_SiteSurvey:
		priv->fast_scan = 0;

		if (status != CMD_STATUS_COMPLETE)
			return;

		priv->site_survey_state = SITE_SURVEY_COMPLETED;
		if (priv->station_is_associated) {
			atmel_enter_state(priv, STATION_STATE_READY);
		} else {
			atmel_scan(priv, 1);
		}
		break;

	case CMD_Join:
		if (status == CMD_STATUS_COMPLETE) {
			if (priv->operating_mode == IW_MODE_ADHOC) {
				priv->station_was_associated = priv->station_is_associated;
				atmel_enter_state(priv, STATION_STATE_READY);
			} else {
				int auth = C80211_MGMT_AAN_OPENSYSTEM;
				priv->AuthenticationRequestRetryCnt = 0;
				atmel_enter_state(priv, STATION_STATE_AUTHENTICATING);

				mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
				priv->CurrentAuthentTransactionSeqNum = 0x0001;
				if (priv->wep_is_on && priv->exclude_unencrypted)
					auth = C80211_MGMT_AAN_SHAREDKEY;
				send_authentication_request(priv, auth, NULL, 0);
			}
			return;
		}

		atmel_scan(priv, 1);
	}
}

static int atmel_wakeup_firmware(struct atmel_private *priv)
{
	struct host_info_struct *iface = &priv->host_info;
	u16 mr1, mr3;
	int i;

	if (priv->card_type == CARD_TYPE_SPI_FLASH)
		atmel_set_gcr(priv->dev, GCR_REMAP);

	/* wake up on-board processor */
	atmel_clear_gcr(priv->dev, 0x0040);
	atmel_write16(priv->dev, BSR, BSS_SRAM);

	if (priv->card_type == CARD_TYPE_SPI_FLASH)
		mdelay(100);

	/* and wait for it */
	for (i = LOOP_RETRY_LIMIT; i; i--) {
		mr1 = atmel_read16(priv->dev, MR1);
		mr3 = atmel_read16(priv->dev, MR3);

		if (mr3 & MAC_BOOT_COMPLETE)
			break;
		if (mr1 & MAC_BOOT_COMPLETE &&
		    priv->bus_type == BUS_TYPE_PCCARD)
			break;
	}

	if (i == 0) {
		printk(KERN_ALERT "%s: MAC failed to boot.\n", priv->dev->name);
		return 0;
	}

	if ((priv->host_info_base = atmel_read16(priv->dev, MR2)) == 0xffff) {
		printk(KERN_ALERT "%s: card missing.\n", priv->dev->name);
		return 0;
	}

	/* now check for completion of MAC initialization through
	   the FunCtrl field of the IFACE, poll MR1 to detect completion of
	   MAC initialization, check completion status, set interrupt mask,
	   enables interrupts and calls Tx and Rx initialization functions */

	atmel_wmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET), FUNC_CTRL_INIT_COMPLETE);

	for (i = LOOP_RETRY_LIMIT; i; i--) {
		mr1 = atmel_read16(priv->dev, MR1);
		mr3 = atmel_read16(priv->dev, MR3);

		if (mr3 & MAC_INIT_COMPLETE)
			break;
		if (mr1 & MAC_INIT_COMPLETE &&
		    priv->bus_type == BUS_TYPE_PCCARD)
			break;
	}

	if (i == 0) {
		printk(KERN_ALERT "%s: MAC failed to initialise.\n",
				priv->dev->name);
		return 0;
	}

	/* Check for MAC_INIT_OK only on the register that the MAC_INIT_OK was set */
	if ((mr3 & MAC_INIT_COMPLETE) &&
	    !(atmel_read16(priv->dev, MR3) & MAC_INIT_OK)) {
		printk(KERN_ALERT "%s: MAC failed MR3 self-test.\n", priv->dev->name);
		return 0;
	}
	if ((mr1 & MAC_INIT_COMPLETE) &&
	    !(atmel_read16(priv->dev, MR1) & MAC_INIT_OK)) {
		printk(KERN_ALERT "%s: MAC failed MR1 self-test.\n", priv->dev->name);
		return 0;
	}

	atmel_copy_to_host(priv->dev, (unsigned char *)iface,
			   priv->host_info_base, sizeof(*iface));

	iface->tx_buff_pos = le16_to_cpu(iface->tx_buff_pos);
	iface->tx_buff_size = le16_to_cpu(iface->tx_buff_size);
	iface->tx_desc_pos = le16_to_cpu(iface->tx_desc_pos);
	iface->tx_desc_count = le16_to_cpu(iface->tx_desc_count);
	iface->rx_buff_pos = le16_to_cpu(iface->rx_buff_pos);
	iface->rx_buff_size = le16_to_cpu(iface->rx_buff_size);
	iface->rx_desc_pos = le16_to_cpu(iface->rx_desc_pos);
	iface->rx_desc_count = le16_to_cpu(iface->rx_desc_count);
	iface->build_version = le16_to_cpu(iface->build_version);
	iface->command_pos = le16_to_cpu(iface->command_pos);
	iface->major_version = le16_to_cpu(iface->major_version);
	iface->minor_version = le16_to_cpu(iface->minor_version);
	iface->func_ctrl = le16_to_cpu(iface->func_ctrl);
	iface->mac_status = le16_to_cpu(iface->mac_status);

	return 1;
}

/* determine type of memory and MAC address */
static int probe_atmel_card(struct net_device *dev)
{
	int rc = 0;
	struct atmel_private *priv = netdev_priv(dev);

	/* reset pccard */
	if (priv->bus_type == BUS_TYPE_PCCARD)
		atmel_write16(dev, GCR, 0x0060);

	atmel_write16(dev, GCR, 0x0040);
	mdelay(500);

	if (atmel_read16(dev, MR2) == 0) {
		/* No stored firmware so load a small stub which just
		   tells us the MAC address */
		int i;
		priv->card_type = CARD_TYPE_EEPROM;
		atmel_write16(dev, BSR, BSS_IRAM);
		atmel_copy_to_card(dev, 0, mac_reader, sizeof(mac_reader));
		atmel_set_gcr(dev, GCR_REMAP);
		atmel_clear_gcr(priv->dev, 0x0040);
		atmel_write16(dev, BSR, BSS_SRAM);
		for (i = LOOP_RETRY_LIMIT; i; i--)
			if (atmel_read16(dev, MR3) & MAC_BOOT_COMPLETE)
				break;
		if (i == 0) {
			printk(KERN_ALERT "%s: MAC failed to boot MAC address reader.\n", dev->name);
		} else {
			atmel_copy_to_host(dev, dev->dev_addr, atmel_read16(dev, MR2), 6);
			/* got address, now squash it again until the network
			   interface is opened */
			if (priv->bus_type == BUS_TYPE_PCCARD)
				atmel_write16(dev, GCR, 0x0060);
			atmel_write16(dev, GCR, 0x0040);
			rc = 1;
		}
	} else if (atmel_read16(dev, MR4) == 0) {
		/* Mac address easy in this case. */
		priv->card_type = CARD_TYPE_PARALLEL_FLASH;
		atmel_write16(dev,  BSR, 1);
		atmel_copy_to_host(dev, dev->dev_addr, 0xc000, 6);
		atmel_write16(dev,  BSR, 0x200);
		rc = 1;
	} else {
		/* Standard firmware in flash, boot it up and ask
		   for the Mac Address */
		priv->card_type = CARD_TYPE_SPI_FLASH;
		if (atmel_wakeup_firmware(priv)) {
			atmel_get_mib(priv, Mac_Address_Mib_Type, 0, dev->dev_addr, 6);

			/* got address, now squash it again until the network
			   interface is opened */
			if (priv->bus_type == BUS_TYPE_PCCARD)
				atmel_write16(dev, GCR, 0x0060);
			atmel_write16(dev, GCR, 0x0040);
			rc = 1;
		}
	}

	if (rc) {
		if (dev->dev_addr[0] == 0xFF) {
			u8 default_mac[] = {0x00,0x04, 0x25, 0x00, 0x00, 0x00};
			printk(KERN_ALERT "%s: *** Invalid MAC address. UPGRADE Firmware ****\n", dev->name);
			memcpy(dev->dev_addr, default_mac, 6);
		}
	}

	return rc;
}

/* Move the encyption information on the MIB structure.
   This routine is for the pre-WPA firmware: later firmware has
   a different format MIB and a different routine. */
static void build_wep_mib(struct atmel_private *priv)
{
	struct { /* NB this is matched to the hardware, don't change. */
		u8 wep_is_on;
		u8 default_key; /* 0..3 */
		u8 reserved;
		u8 exclude_unencrypted;

		u32 WEPICV_error_count;
		u32 WEP_excluded_count;

		u8 wep_keys[MAX_ENCRYPTION_KEYS][13];
		u8 encryption_level; /* 0, 1, 2 */
		u8 reserved2[3];
	} mib;
	int i;

	mib.wep_is_on = priv->wep_is_on;
	if (priv->wep_is_on) {
		if (priv->wep_key_len[priv->default_key] > 5)
			mib.encryption_level = 2;
		else
			mib.encryption_level = 1;
	} else {
		mib.encryption_level = 0;
	}

	mib.default_key = priv->default_key;
	mib.exclude_unencrypted = priv->exclude_unencrypted;

	for (i = 0; i < MAX_ENCRYPTION_KEYS; i++)
		memcpy(mib.wep_keys[i], priv->wep_keys[i], 13);

	atmel_set_mib(priv, Mac_Wep_Mib_Type, 0, (u8 *)&mib, sizeof(mib));
}

static void build_wpa_mib(struct atmel_private *priv)
{
	/* This is for the later (WPA enabled) firmware. */

	struct { /* NB this is matched to the hardware, don't change. */
		u8 cipher_default_key_value[MAX_ENCRYPTION_KEYS][MAX_ENCRYPTION_KEY_SIZE];
		u8 receiver_address[6];
		u8 wep_is_on;
		u8 default_key; /* 0..3 */
		u8 group_key;
		u8 exclude_unencrypted;
		u8 encryption_type;
		u8 reserved;

		u32 WEPICV_error_count;
		u32 WEP_excluded_count;

		u8 key_RSC[4][8];
	} mib;

	int i;

	mib.wep_is_on = priv->wep_is_on;
	mib.exclude_unencrypted = priv->exclude_unencrypted;
	memcpy(mib.receiver_address, priv->CurrentBSSID, 6);

	/* zero all the keys before adding in valid ones. */
	memset(mib.cipher_default_key_value, 0, sizeof(mib.cipher_default_key_value));

	if (priv->wep_is_on) {
		/* There's a comment in the Atmel code to the effect that this
		   is only valid when still using WEP, it may need to be set to
		   something to use WPA */
		memset(mib.key_RSC, 0, sizeof(mib.key_RSC));

		mib.default_key = mib.group_key = 255;
		for (i = 0; i < MAX_ENCRYPTION_KEYS; i++) {
			if (priv->wep_key_len[i] > 0) {
				memcpy(mib.cipher_default_key_value[i], priv->wep_keys[i], MAX_ENCRYPTION_KEY_SIZE);
				if (i == priv->default_key) {
					mib.default_key = i;
					mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-1] = 7;
					mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-2] = priv->pairwise_cipher_suite;
				} else {
					mib.group_key = i;
					priv->group_cipher_suite = priv->pairwise_cipher_suite;
				        mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-1] = 1;
					mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-2] = priv->group_cipher_suite;
				}
			}
		}
		if (mib.default_key == 255)
			mib.default_key = mib.group_key != 255 ? mib.group_key : 0;
		if (mib.group_key == 255)
			mib.group_key = mib.default_key;

	}

	atmel_set_mib(priv, Mac_Wep_Mib_Type, 0, (u8 *)&mib, sizeof(mib));
}

static int reset_atmel_card(struct net_device *dev)
{
	/* do everything necessary to wake up the hardware, including
	   waiting for the lightning strike and throwing the knife switch....

	   set all the Mib values which matter in the card to match
	   their settings in the atmel_private structure. Some of these
	   can be altered on the fly, but many (WEP, infrastucture or ad-hoc)
	   can only be changed by tearing down the world and coming back through
	   here.

	   This routine is also responsible for initialising some
	   hardware-specific fields in the atmel_private structure,
	   including a copy of the firmware's hostinfo stucture
	   which is the route into the rest of the firmare datastructures. */

	struct atmel_private *priv = netdev_priv(dev);
	u8 configuration;
	int old_state = priv->station_state;

	/* data to add to the firmware names, in priority order
	   this implemenents firmware versioning */

	static char *firmware_modifier[] = {
		"-wpa",
		"",
		NULL
	};

	/* reset pccard */
	if (priv->bus_type == BUS_TYPE_PCCARD)
		atmel_write16(priv->dev, GCR, 0x0060);

	/* stop card , disable interrupts */
	atmel_write16(priv->dev, GCR, 0x0040);

	if (priv->card_type == CARD_TYPE_EEPROM) {
		/* copy in firmware if needed */
		const struct firmware *fw_entry = NULL;
		unsigned char *fw;
		int len = priv->firmware_length;
		if (!(fw = priv->firmware)) {
			if (priv->firmware_type == ATMEL_FW_TYPE_NONE) {
				if (strlen(priv->firmware_id) == 0) {
					printk(KERN_INFO
					       "%s: card type is unknown: assuming at76c502 firmware is OK.\n",
					       dev->name);
					printk(KERN_INFO
					       "%s: if not, use the firmware= module parameter.\n",
					       dev->name);
					strcpy(priv->firmware_id, "atmel_at76c502.bin");
				}
				if (request_firmware(&fw_entry, priv->firmware_id, priv->sys_dev) != 0) {
					printk(KERN_ALERT
					       "%s: firmware %s is missing, cannot continue.\n",
					       dev->name, priv->firmware_id);
					return 0;
				}
			} else {
				int fw_index = 0;
				int success = 0;

				/* get firmware filename entry based on firmware type ID */
				while (fw_table[fw_index].fw_type != priv->firmware_type
						&& fw_table[fw_index].fw_type != ATMEL_FW_TYPE_NONE)
					fw_index++;

				/* construct the actual firmware file name */
				if (fw_table[fw_index].fw_type != ATMEL_FW_TYPE_NONE) {
					int i;
					for (i = 0; firmware_modifier[i]; i++) {
						snprintf(priv->firmware_id, 32, "%s%s.%s", fw_table[fw_index].fw_file,
							firmware_modifier[i], fw_table[fw_index].fw_file_ext);
						priv->firmware_id[31] = '\0';
						if (request_firmware(&fw_entry, priv->firmware_id, priv->sys_dev) == 0) {
							success = 1;
							break;
						}
					}
				}
				if (!success) {
					printk(KERN_ALERT
					       "%s: firmware %s is missing, cannot start.\n",
					       dev->name, priv->firmware_id);
					priv->firmware_id[0] = '\0';
					return 0;
				}
			}

			fw = fw_entry->data;
			len = fw_entry->size;
		}

	        if (len <= 0x6000) {
			atmel_write16(priv->dev, BSR, BSS_IRAM);
			atmel_copy_to_card(priv->dev, 0, fw, len);
			atmel_set_gcr(priv->dev, GCR_REMAP);
		} else {
			/* Remap */
			atmel_set_gcr(priv->dev, GCR_REMAP);
			atmel_write16(priv->dev, BSR, BSS_IRAM);
			atmel_copy_to_card(priv->dev, 0, fw, 0x6000);
			atmel_write16(priv->dev, BSR, 0x2ff);
			atmel_copy_to_card(priv->dev, 0x8000, &fw[0x6000], len - 0x6000);
		}

		if (fw_entry)
			release_firmware(fw_entry);
	}

	if (!atmel_wakeup_firmware(priv))
		return 0;

	/* Check the version and set the correct flag for wpa stuff,
	   old and new firmware is incompatible.
	   The pre-wpa 3com firmware reports major version 5,
	   the wpa 3com firmware is major version 4 and doesn't need
	   the 3com broken-ness filter. */
	priv->use_wpa = (priv->host_info.major_version == 4);
	priv->radio_on_broken = (priv->host_info.major_version == 5);

        /* unmask all irq sources */
	atmel_wmem8(priv, atmel_hi(priv, IFACE_INT_MASK_OFFSET), 0xff);

	/* int Tx system and enable Tx */
	atmel_wmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, 0), 0);
	atmel_wmem32(priv, atmel_tx(priv, TX_DESC_NEXT_OFFSET, 0), 0x80000000L);
	atmel_wmem16(priv, atmel_tx(priv, TX_DESC_POS_OFFSET, 0), 0);
	atmel_wmem16(priv, atmel_tx(priv, TX_DESC_SIZE_OFFSET, 0), 0);

	priv->tx_desc_free = priv->host_info.tx_desc_count;
	priv->tx_desc_head = 0;
	priv->tx_desc_tail = 0;
	priv->tx_desc_previous = 0;
	priv->tx_free_mem = priv->host_info.tx_buff_size;
	priv->tx_buff_head = 0;
	priv->tx_buff_tail = 0;

	configuration = atmel_rmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET));
	atmel_wmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET),
				   configuration | FUNC_CTRL_TxENABLE);

	/* init Rx system and enable */
	priv->rx_desc_head = 0;

	configuration = atmel_rmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET));
	atmel_wmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET),
				   configuration | FUNC_CTRL_RxENABLE);

	if (!priv->radio_on_broken) {
		if (atmel_send_command_wait(priv, CMD_EnableRadio, NULL, 0) ==
		    CMD_STATUS_REJECTED_RADIO_OFF) {
			printk(KERN_INFO
			       "%s: cannot turn the radio on. (Hey radio, you're beautiful!)\n",
			       dev->name);
                        return 0;
		}
	}

	/* set up enough MIB values to run. */
	atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_AUTO_TX_RATE_POS, priv->auto_tx_rate);
	atmel_set_mib8(priv, Local_Mib_Type,  LOCAL_MIB_TX_PROMISCUOUS_POS,  PROM_MODE_OFF);
	atmel_set_mib16(priv, Mac_Mib_Type, MAC_MIB_RTS_THRESHOLD_POS, priv->rts_threshold);
	atmel_set_mib16(priv, Mac_Mib_Type, MAC_MIB_FRAG_THRESHOLD_POS, priv->frag_threshold);
	atmel_set_mib8(priv, Mac_Mib_Type, MAC_MIB_SHORT_RETRY_POS, priv->short_retry);
	atmel_set_mib8(priv, Mac_Mib_Type, MAC_MIB_LONG_RETRY_POS, priv->long_retry);
	atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_PREAMBLE_TYPE, priv->preamble);
	atmel_set_mib(priv, Mac_Address_Mib_Type, MAC_ADDR_MIB_MAC_ADDR_POS,
		      priv->dev->dev_addr, 6);
	atmel_set_mib8(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_PS_MODE_POS, ACTIVE_MODE);
	atmel_set_mib16(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 1);
	atmel_set_mib16(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_BEACON_PER_POS, priv->default_beacon_period);
	atmel_set_mib(priv, Phy_Mib_Type, PHY_MIB_RATE_SET_POS, atmel_basic_rates, 4);
	atmel_set_mib8(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_CUR_PRIVACY_POS, priv->wep_is_on);
	if (priv->use_wpa)
		build_wpa_mib(priv);
	else
		build_wep_mib(priv);

	if (old_state == STATION_STATE_READY)
	{
		union iwreq_data wrqu;

		wrqu.data.length = 0;
		wrqu.data.flags = 0;
		wrqu.ap_addr.sa_family = ARPHRD_ETHER;
		memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
		wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
	}

	return 1;
}

static void atmel_send_command(struct atmel_private *priv, int command,
			       void *cmd, int cmd_size)
{
	if (cmd)
		atmel_copy_to_card(priv->dev, atmel_co(priv, CMD_BLOCK_PARAMETERS_OFFSET),
				   cmd, cmd_size);

	atmel_wmem8(priv, atmel_co(priv, CMD_BLOCK_COMMAND_OFFSET), command);
	atmel_wmem8(priv, atmel_co(priv, CMD_BLOCK_STATUS_OFFSET), 0);
}

static int atmel_send_command_wait(struct atmel_private *priv, int command,
				   void *cmd, int cmd_size)
{
	int i, status;

	atmel_send_command(priv, command, cmd, cmd_size);

	for (i = 5000; i; i--) {
		status = atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_STATUS_OFFSET));
		if (status != CMD_STATUS_IDLE &&
		    status != CMD_STATUS_IN_PROGRESS)
			break;
		udelay(20);
	}

	if (i == 0) {
		printk(KERN_ALERT "%s: failed to contact MAC.\n", priv->dev->name);
		status =  CMD_STATUS_HOST_ERROR;
	} else {
		if (command != CMD_EnableRadio)
			status = CMD_STATUS_COMPLETE;
	}

	return status;
}

static u8 atmel_get_mib8(struct atmel_private *priv, u8 type, u8 index)
{
	struct get_set_mib m;
	m.type = type;
	m.size = 1;
	m.index = index;

	atmel_send_command_wait(priv, CMD_Get_MIB_Vars, &m, MIB_HEADER_SIZE + 1);
	return atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_PARAMETERS_OFFSET + MIB_HEADER_SIZE));
}

static void atmel_set_mib8(struct atmel_private *priv, u8 type, u8 index, u8 data)
{
	struct get_set_mib m;
	m.type = type;
	m.size = 1;
	m.index = index;
	m.data[0] = data;

	atmel_send_command_wait(priv, CMD_Set_MIB_Vars, &m, MIB_HEADER_SIZE + 1);
}

static void atmel_set_mib16(struct atmel_private *priv, u8 type, u8 index,
			    u16 data)
{
	struct get_set_mib m;
	m.type = type;
	m.size = 2;
	m.index = index;
	m.data[0] = data;
	m.data[1] = data >> 8;

	atmel_send_command_wait(priv, CMD_Set_MIB_Vars, &m, MIB_HEADER_SIZE + 2);
}

static void atmel_set_mib(struct atmel_private *priv, u8 type, u8 index,
			  u8 *data, int data_len)
{
	struct get_set_mib m;
	m.type = type;
	m.size = data_len;
	m.index = index;

	if (data_len > MIB_MAX_DATA_BYTES)
		printk(KERN_ALERT "%s: MIB buffer too small.\n", priv->dev->name);

	memcpy(m.data, data, data_len);
	atmel_send_command_wait(priv, CMD_Set_MIB_Vars, &m, MIB_HEADER_SIZE + data_len);
}

static void atmel_get_mib(struct atmel_private *priv, u8 type, u8 index,
			  u8 *data, int data_len)
{
	struct get_set_mib m;
	m.type = type;
	m.size = data_len;
	m.index = index;

	if (data_len > MIB_MAX_DATA_BYTES)
		printk(KERN_ALERT "%s: MIB buffer too small.\n", priv->dev->name);

	atmel_send_command_wait(priv, CMD_Get_MIB_Vars, &m, MIB_HEADER_SIZE + data_len);
	atmel_copy_to_host(priv->dev, data,
			   atmel_co(priv, CMD_BLOCK_PARAMETERS_OFFSET + MIB_HEADER_SIZE), data_len);
}

static void atmel_writeAR(struct net_device *dev, u16 data)
{
	int i;
	outw(data, dev->base_addr + AR);
	/* Address register appears to need some convincing..... */
	for (i = 0; data != inw(dev->base_addr + AR) && i < 10; i++)
		outw(data, dev->base_addr + AR);
}

static void atmel_copy_to_card(struct net_device *dev, u16 dest,
			       unsigned char *src, u16 len)
{
	int i;
	atmel_writeAR(dev, dest);
	if (dest % 2) {
		atmel_write8(dev, DR, *src);
		src++; len--;
	}
	for (i = len; i > 1 ; i -= 2) {
		u8 lb = *src++;
		u8 hb = *src++;
		atmel_write16(dev, DR, lb | (hb << 8));
	}
	if (i)
		atmel_write8(dev, DR, *src);
}

static void atmel_copy_to_host(struct net_device *dev, unsigned char *dest,
			       u16 src, u16 len)
{
	int i;
	atmel_writeAR(dev, src);
	if (src % 2) {
		*dest = atmel_read8(dev, DR);
		dest++; len--;
	}
	for (i = len; i > 1 ; i -= 2) {
		u16 hw = atmel_read16(dev, DR);
		*dest++ = hw;
		*dest++ = hw >> 8;
	}
	if (i)
		*dest = atmel_read8(dev, DR);
}

static void atmel_set_gcr(struct net_device *dev, u16 mask)
{
	outw(inw(dev->base_addr + GCR) | mask, dev->base_addr + GCR);
}

static void atmel_clear_gcr(struct net_device *dev, u16 mask)
{
	outw(inw(dev->base_addr + GCR) & ~mask, dev->base_addr + GCR);
}

static int atmel_lock_mac(struct atmel_private *priv)
{
	int i, j = 20;
 retry:
	for (i = 5000; i; i--) {
		if (!atmel_rmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_HOST_OFFSET)))
			break;
		udelay(20);
	}

	if (!i)
		return 0; /* timed out */

	atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 1);
	if (atmel_rmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_HOST_OFFSET))) {
		atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 0);
		if (!j--)
			return 0; /* timed out */
		goto retry;
	}

	return 1;
}

static void atmel_wmem32(struct atmel_private *priv, u16 pos, u32 data)
{
	atmel_writeAR(priv->dev, pos);
	atmel_write16(priv->dev, DR, data); /* card is little-endian */
	atmel_write16(priv->dev, DR, data >> 16);
}

/***************************************************************************/
/* There follows the source form of the MAC address reading firmware       */
/***************************************************************************/
#if 0

/* Copyright 2003 Matthew T. Russotto                                      */
/* But derived from the Atmel 76C502 firmware written by Atmel and         */
/* included in "atmel wireless lan drivers" package                        */
/**
    This file is part of net.russotto.AtmelMACFW, hereto referred to
    as AtmelMACFW

    AtmelMACFW is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License version 2
    as published by the Free Software Foundation.

    AtmelMACFW 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 AtmelMACFW; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

****************************************************************************/
/* This firmware should work on the 76C502 RFMD, RFMD_D, and RFMD_E        */
/* It will probably work on the 76C504 and 76C502 RFMD_3COM                */
/* It only works on SPI EEPROM versions of the card.                       */

/* This firmware initializes the SPI controller and clock, reads the MAC   */
/* address from the EEPROM into SRAM, and puts the SRAM offset of the MAC  */
/* address in MR2, and sets MR3 to 0x10 to indicate it is done             */
/* It also puts a complete copy of the EEPROM in SRAM with the offset in   */
/* MR4, for investigational purposes (maybe we can determine chip type     */
/* from that?)                                                             */

	.org 0
    .set MRBASE, 0x8000000
	.set CPSR_INITIAL, 0xD3 /* IRQ/FIQ disabled, ARM mode, Supervisor state */
	.set CPSR_USER, 0xD1 /* IRQ/FIQ disabled, ARM mode, USER state */
	.set SRAM_BASE,  0x02000000
	.set SP_BASE,    0x0F300000
	.set UNK_BASE,   0x0F000000 /* Some internal device, but which one? */
	.set SPI_CGEN_BASE,  0x0E000000 /* Some internal device, but which one? */
	.set UNK3_BASE,  0x02014000 /* Some internal device, but which one? */
	.set STACK_BASE, 0x5600
	.set SP_SR, 0x10
	.set SP_TDRE, 2 /* status register bit -- TDR empty */
	.set SP_RDRF, 1 /* status register bit -- RDR full */
	.set SP_SWRST, 0x80
	.set SP_SPIEN, 0x1
	.set SP_CR, 0   /* control register */
	.set SP_MR, 4   /* mode register */
	.set SP_RDR, 0x08 /* Read Data Register */
	.set SP_TDR, 0x0C /* Transmit Data Register */
	.set SP_CSR0, 0x30 /* chip select registers */
	.set SP_CSR1, 0x34
	.set SP_CSR2, 0x38
	.set SP_CSR3, 0x3C
	.set NVRAM_CMD_RDSR, 5 /* read status register */
	.set NVRAM_CMD_READ, 3 /* read data */
	.set NVRAM_SR_RDY, 1 /* RDY bit.  This bit is inverted */
	.set SPI_8CLOCKS, 0xFF /* Writing this to the TDR doesn't do anything to the
				  serial output, since SO is normally high.  But it
				  does cause 8 clock cycles and thus 8 bits to be
				  clocked in to the chip.  See Atmel's SPI
				  controller (e.g. AT91M55800) timing and 4K
				  SPI EEPROM manuals */

	.set NVRAM_SCRATCH, 0x02000100  /* arbitrary area for scratchpad memory */
	.set NVRAM_IMAGE, 0x02000200
	.set NVRAM_LENGTH, 0x0200
	.set MAC_ADDRESS_MIB, SRAM_BASE
	.set MAC_ADDRESS_LENGTH, 6
        .set MAC_BOOT_FLAG, 0x10
	.set MR1, 0
	.set MR2, 4
	.set MR3, 8
	.set MR4, 0xC
RESET_VECTOR:
        b RESET_HANDLER
UNDEF_VECTOR:
        b HALT1
SWI_VECTOR:
        b HALT1
IABORT_VECTOR:
        b HALT1
DABORT_VECTOR:
RESERVED_VECTOR:
        b HALT1
IRQ_VECTOR:
        b HALT1
FIQ_VECTOR:
	b HALT1
HALT1:	b HALT1
RESET_HANDLER:
	mov     r0, #CPSR_INITIAL
	msr	CPSR_c, r0	/* This is probably unnecessary */

/* I'm guessing this is initializing clock generator electronics for SPI */
	ldr	r0, =SPI_CGEN_BASE
	mov	r1, #0
	mov	r1, r1, lsl #3
	orr	r1,r1, #0
	str	r1, [r0]
	ldr	r1, [r0, #28]
	bic	r1, r1, #16
	str	r1, [r0, #28]
	mov	r1, #1
	str	r1, [r0, #8]

	ldr	r0, =MRBASE
	mov	r1, #0
	strh	r1, [r0, #MR1]
	strh	r1, [r0, #MR2]
	strh	r1, [r0, #MR3]
	strh	r1, [r0, #MR4]

	mov	sp, #STACK_BASE
	bl	SP_INIT
	mov	r0, #10
	bl	DELAY9
	bl	GET_MAC_ADDR
	bl	GET_WHOLE_NVRAM
	ldr	r0, =MRBASE
	ldr	r1, =MAC_ADDRESS_MIB
	strh	r1, [r0, #MR2]
	ldr	r1, =NVRAM_IMAGE
	strh	r1, [r0, #MR4]
	mov	r1, #MAC_BOOT_FLAG
	strh	r1, [r0, #MR3]
HALT2:	b HALT2
.func Get_Whole_NVRAM, GET_WHOLE_NVRAM
GET_WHOLE_NVRAM:
	stmdb	sp!, {lr}
	mov	r2, #0 /* 0th bytes of NVRAM */
	mov	r3, #NVRAM_LENGTH
	mov	r1, #0		/* not used in routine */
	ldr	r0, =NVRAM_IMAGE
	bl	NVRAM_XFER
	ldmia	sp!, {lr}
	bx	lr
.endfunc

.func Get_MAC_Addr, GET_MAC_ADDR
GET_MAC_ADDR:
	stmdb	sp!, {lr}
	mov	r2, #0x120	/* address of MAC Address within NVRAM */
	mov	r3, #MAC_ADDRESS_LENGTH
	mov	r1, #0		/* not used in routine */
	ldr	r0, =MAC_ADDRESS_MIB
	bl	NVRAM_XFER
	ldmia	sp!, {lr}
	bx	lr
.endfunc
.ltorg
.func Delay9, DELAY9
DELAY9:
	adds	r0, r0, r0, LSL #3   /* r0 = r0 * 9 */
DELAYLOOP:
	beq	DELAY9_done
	subs	r0, r0, #1
	b	DELAYLOOP
DELAY9_done:
	bx	lr
.endfunc

.func SP_Init, SP_INIT
SP_INIT:
	mov	r1, #SP_SWRST
	ldr	r0, =SP_BASE
	str	r1, [r0, #SP_CR] /* reset the SPI */
	mov	r1, #0
	str	r1, [r0, #SP_CR] /* release SPI from reset state */
	mov	r1, #SP_SPIEN
	str	r1, [r0, #SP_MR] /* set the SPI to MASTER mode*/
	str	r1, [r0, #SP_CR] /* enable the SPI */

/*  My guess would be this turns on the SPI clock */
	ldr	r3, =SPI_CGEN_BASE
	ldr	r1, [r3, #28]
	orr	r1, r1, #0x2000
	str	r1, [r3, #28]

	ldr	r1, =0x2000c01
	str	r1, [r0, #SP_CSR0]
	ldr	r1, =0x2000201
	str	r1, [r0, #SP_CSR1]
	str	r1, [r0, #SP_CSR2]
	str	r1, [r0, #SP_CSR3]
	ldr	r1, [r0, #SP_SR]
	ldr	r0, [r0, #SP_RDR]
	bx	lr
.endfunc
.func NVRAM_Init, NVRAM_INIT
NVRAM_INIT:
	ldr	r1, =SP_BASE
	ldr	r0, [r1, #SP_RDR]
	mov	r0, #NVRAM_CMD_RDSR
	str	r0, [r1, #SP_TDR]
SP_loop1:
	ldr	r0, [r1, #SP_SR]
	tst	r0, #SP_TDRE
	beq	SP_loop1

	mov	r0, #SPI_8CLOCKS
	str	r0, [r1, #SP_TDR]
SP_loop2:
	ldr	r0, [r1, #SP_SR]
	tst	r0, #SP_TDRE
	beq	SP_loop2

	ldr	r0, [r1, #SP_RDR]
SP_loop3:
	ldr	r0, [r1, #SP_SR]
	tst	r0, #SP_RDRF
	beq	SP_loop3

	ldr	r0, [r1, #SP_RDR]
	and	r0, r0, #255
	bx	lr
.endfunc

.func NVRAM_Xfer, NVRAM_XFER
	/* r0 = dest address */
	/* r1 = not used */
	/* r2 = src address within NVRAM */
	/* r3 = length */
NVRAM_XFER:
	stmdb	sp!, {r4, r5, lr}
	mov	r5, r0		/* save r0 (dest address) */
	mov	r4, r3		/* save r3 (length) */
	mov	r0, r2, LSR #5 /*  SPI memories put A8 in the command field */
	and	r0, r0, #8
	add	r0, r0, #NVRAM_CMD_READ
	ldr	r1, =NVRAM_SCRATCH
	strb	r0, [r1, #0]	/* save command in NVRAM_SCRATCH[0] */
	strb	r2, [r1, #1]    /* save low byte of source address in NVRAM_SCRATCH[1] */
_local1:
	bl	NVRAM_INIT
	tst	r0, #NVRAM_SR_RDY
	bne	_local1
	mov	r0, #20
	bl	DELAY9
	mov	r2, r4		/* length */
	mov	r1, r5		/* dest address */
	mov	r0, #2		/* bytes to transfer in command */
	bl	NVRAM_XFER2
	ldmia	sp!, {r4, r5, lr}
	bx	lr
.endfunc

.func NVRAM_Xfer2, NVRAM_XFER2
NVRAM_XFER2:
	stmdb	sp!, {r4, r5, r6, lr}
	ldr	r4, =SP_BASE
	mov	r3, #0
	cmp	r0, #0
	bls	_local2
	ldr	r5, =NVRAM_SCRATCH
_local4:
	ldrb	r6, [r5, r3]
	str	r6, [r4, #SP_TDR]
_local3:
	ldr	r6, [r4, #SP_SR]
	tst	r6, #SP_TDRE
	beq	_local3
	add	r3, r3, #1
	cmp	r3, r0 /* r0 is # of bytes to send out (command+addr) */
	blo	_local4
_local2:
	mov	r3, #SPI_8CLOCKS
	str	r3, [r4, #SP_TDR]
	ldr	r0, [r4, #SP_RDR]
_local5:
	ldr	r0, [r4, #SP_SR]
	tst	r0, #SP_RDRF
	beq	_local5
	ldr	r0, [r4, #SP_RDR] /* what's this byte?  It's the byte read while writing the TDR -- nonsense, because the NVRAM doesn't read and write at the same time */
	mov	r0, #0
	cmp	r2, #0  /* r2 is # of bytes to copy in */
	bls	_local6
_local7:
	ldr	r5, [r4, #SP_SR]
	tst	r5, #SP_TDRE
	beq	_local7
	str	r3, [r4, #SP_TDR]  /* r3 has SPI_8CLOCKS */
_local8:
	ldr	r5, [r4, #SP_SR]
	tst	r5, #SP_RDRF
	beq	_local8
	ldr	r5, [r4, #SP_RDR] /* but didn't we read this byte above? */
	strb	r5, [r1], #1 /* postindexed */
	add	r0, r0, #1
	cmp	r0, r2
	blo	_local7 /* since we don't send another address, the NVRAM must be capable of sequential reads */
_local6:
	mov	r0, #200
	bl	DELAY9
	ldmia	sp!, {r4, r5, r6, lr}
	bx	lr
#endif