aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/iwlwifi/iwl3945-base.c
blob: 465da4f67ce73d0fcfb9b1b9c7440d1b131dd2af (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
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
5901
5902
5903
5904
5905
5906
5907
5908
5909
5910
5911
5912
5913
5914
5915
5916
5917
5918
5919
5920
5921
5922
5923
5924
5925
5926
5927
5928
5929
5930
5931
5932
5933
5934
5935
5936
5937
5938
5939
5940
5941
5942
5943
5944
5945
5946
5947
5948
5949
5950
5951
5952
5953
5954
5955
5956
5957
5958
5959
5960
5961
5962
5963
5964
5965
5966
5967
5968
5969
5970
5971
5972
5973
5974
5975
5976
5977
5978
5979
5980
5981
5982
5983
5984
5985
5986
5987
5988
5989
5990
5991
5992
5993
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6016
6017
6018
6019
6020
6021
6022
6023
6024
6025
6026
6027
6028
6029
6030
6031
6032
6033
6034
6035
6036
6037
6038
6039
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
6092
6093
6094
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501
6502
6503
6504
6505
6506
6507
6508
6509
6510
6511
6512
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
6576
6577
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
6595
6596
6597
6598
6599
6600
6601
6602
6603
6604
6605
6606
6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627
6628
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
6644
6645
6646
6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
6663
6664
6665
6666
6667
6668
6669
6670
6671
6672
6673
6674
6675
6676
6677
6678
6679
6680
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
6711
6712
6713
6714
6715
6716
6717
6718
6719
6720
6721
6722
6723
6724
6725
6726
6727
6728
6729
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
6766
6767
6768
6769
6770
6771
6772
6773
6774
6775
6776
6777
6778
6779
6780
6781
6782
6783
6784
6785
6786
6787
6788
6789
6790
6791
6792
6793
6794
6795
6796
6797
6798
6799
6800
6801
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
6835
6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
6846
6847
6848
6849
6850
6851
6852
6853
6854
6855
6856
6857
6858
6859
6860
6861
6862
6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879
6880
6881
6882
6883
6884
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
6914
6915
6916
6917
6918
6919
6920
6921
6922
6923
6924
6925
6926
6927
6928
6929
6930
6931
6932
6933
6934
6935
6936
6937
6938
6939
6940
6941
6942
6943
6944
6945
6946
6947
6948
6949
6950
6951
6952
6953
6954
6955
6956
6957
6958
6959
6960
6961
6962
6963
6964
6965
6966
6967
6968
6969
6970
6971
6972
6973
6974
6975
6976
6977
6978
6979
6980
6981
6982
6983
6984
6985
6986
6987
6988
6989
6990
6991
6992
6993
6994
6995
6996
6997
6998
6999
7000
7001
7002
7003
7004
7005
7006
7007
7008
7009
7010
7011
7012
7013
7014
7015
7016
7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079
7080
7081
7082
7083
7084
7085
7086
7087
7088
7089
7090
7091
7092
7093
7094
7095
7096
7097
7098
7099
7100
7101
7102
7103
7104
7105
7106
7107
7108
7109
7110
7111
7112
7113
7114
7115
7116
7117
7118
7119
7120
7121
7122
7123
7124
7125
7126
7127
7128
7129
7130
7131
7132
7133
7134
7135
7136
7137
7138
7139
7140
7141
7142
7143
7144
7145
7146
7147
7148
7149
7150
7151
7152
7153
7154
7155
7156
7157
7158
7159
7160
7161
7162
7163
7164
7165
7166
7167
7168
7169
7170
7171
7172
7173
7174
7175
7176
7177
7178
7179
7180
7181
7182
7183
7184
7185
7186
7187
7188
7189
7190
7191
7192
7193
7194
7195
7196
7197
7198
7199
7200
7201
7202
7203
7204
7205
7206
7207
7208
7209
7210
7211
7212
7213
7214
7215
7216
7217
7218
7219
7220
7221
7222
7223
7224
7225
7226
7227
7228
7229
7230
7231
7232
7233
7234
7235
7236
7237
7238
7239
7240
7241
7242
7243
7244
7245
7246
7247
7248
7249
7250
7251
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
7266
7267
7268
7269
7270
7271
7272
7273
7274
7275
7276
7277
7278
7279
7280
7281
7282
7283
7284
7285
7286
7287
7288
7289
7290
7291
7292
7293
7294
7295
7296
7297
7298
7299
7300
7301
7302
7303
7304
7305
7306
7307
7308
7309
7310
7311
7312
7313
7314
7315
7316
7317
7318
7319
7320
7321
7322
7323
7324
7325
7326
7327
7328
7329
7330
7331
7332
7333
7334
7335
7336
7337
7338
7339
7340
7341
7342
7343
7344
7345
7346
7347
7348
7349
7350
7351
7352
7353
7354
7355
7356
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
7369
7370
7371
7372
7373
7374
7375
7376
7377
7378
7379
7380
7381
7382
7383
7384
7385
7386
7387
7388
7389
7390
7391
7392
7393
7394
7395
7396
7397
7398
7399
7400
7401
7402
7403
7404
7405
7406
7407
7408
7409
7410
7411
7412
7413
7414
7415
7416
7417
7418
7419
7420
7421
7422
7423
7424
7425
7426
7427
7428
7429
7430
7431
7432
7433
7434
7435
7436
7437
7438
7439
7440
7441
7442
7443
7444
7445
7446
7447
7448
7449
7450
7451
7452
7453
7454
7455
7456
7457
7458
7459
7460
7461
7462
7463
7464
7465
7466
7467
7468
7469
7470
7471
7472
7473
7474
7475
7476
7477
7478
7479
7480
7481
7482
7483
7484
7485
7486
7487
7488
7489
7490
7491
7492
7493
7494
7495
7496
7497
7498
7499
7500
7501
7502
7503
7504
7505
7506
7507
7508
7509
7510
7511
7512
7513
7514
7515
7516
7517
7518
7519
7520
7521
7522
7523
7524
7525
7526
7527
7528
7529
7530
7531
7532
7533
7534
7535
7536
7537
7538
7539
7540
7541
7542
7543
7544
7545
7546
7547
7548
7549
7550
7551
7552
7553
7554
7555
7556
7557
7558
7559
7560
7561
7562
7563
7564
7565
7566
7567
7568
7569
7570
7571
7572
7573
7574
7575
7576
7577
7578
7579
7580
7581
7582
7583
7584
7585
7586
7587
7588
7589
7590
7591
7592
7593
7594
7595
7596
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609
7610
7611
7612
7613
7614
7615
7616
7617
7618
7619
7620
7621
7622
7623
7624
7625
7626
7627
7628
7629
7630
7631
7632
7633
7634
7635
7636
7637
7638
7639
7640
7641
7642
7643
7644
7645
7646
7647
7648
7649
7650
7651
7652
7653
7654
7655
7656
7657
7658
7659
7660
7661
7662
7663
7664
7665
7666
7667
7668
7669
7670
7671
7672
7673
7674
7675
7676
7677
7678
7679
7680
7681
7682
7683
7684
7685
7686
7687
7688
7689
7690
7691
7692
7693
7694
7695
7696
7697
7698
7699
7700
7701
7702
7703
7704
7705
7706
7707
7708
7709
7710
7711
7712
7713
7714
7715
7716
7717
7718
7719
7720
7721
7722
7723
7724
7725
7726
7727
7728
7729
7730
7731
7732
7733
7734
7735
7736
7737
7738
7739
7740
7741
7742
7743
7744
7745
7746
7747
7748
7749
7750
7751
7752
7753
7754
7755
7756
7757
7758
7759
7760
7761
7762
7763
7764
7765
7766
7767
7768
7769
7770
7771
7772
7773
7774
7775
7776
7777
7778
7779
7780
7781
7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
7793
7794
7795
7796
7797
7798
7799
7800
7801
7802
7803
7804
7805
7806
7807
7808
7809
7810
7811
7812
7813
7814
7815
7816
7817
7818
7819
7820
7821
7822
7823
7824
7825
7826
7827
7828
7829
7830
7831
7832
7833
7834
7835
7836
7837
7838
7839
7840
7841
7842
7843
7844
7845
7846
7847
7848
7849
7850
7851
7852
7853
7854
7855
7856
7857
7858
7859
7860
7861
7862
7863
7864
7865
7866
7867
7868
7869
7870
7871
7872
7873
7874
7875
7876
7877
7878
7879
7880
7881
7882
7883
7884
7885
7886
7887
7888
7889
7890
7891
7892
7893
7894
7895
7896
7897
7898
7899
7900
7901
7902
7903
7904
7905
7906
7907
7908
7909
7910
7911
7912
7913
7914
7915
7916
7917
7918
7919
7920
7921
7922
7923
7924
7925
7926
7927
7928
7929
7930
7931
7932
7933
7934
7935
7936
7937
7938
7939
7940
7941
7942
7943
7944
7945
7946
7947
7948
7949
7950
7951
7952
7953
7954
7955
7956
7957
7958
7959
7960
7961
7962
7963
7964
7965
7966
7967
7968
7969
7970
7971
7972
7973
7974
7975
7976
7977
7978
7979
7980
7981
7982
7983
7984
7985
7986
7987
7988
7989
7990
7991
7992
7993
7994
7995
7996
7997
7998
7999
8000
8001
8002
8003
8004
8005
8006
8007
8008
8009
8010
8011
8012
8013
8014
8015
8016
8017
8018
8019
8020
8021
8022
8023
8024
8025
8026
8027
8028
8029
8030
8031
8032
8033
8034
8035
8036
8037
8038
8039
8040
8041
8042
8043
8044
8045
8046
8047
8048
8049
8050
8051
8052
8053
8054
8055
8056
8057
8058
8059
8060
8061
8062
8063
8064
8065
8066
8067
8068
8069
8070
8071
8072
8073
8074
8075
8076
8077
8078
8079
8080
8081
8082
8083
8084
8085
8086
8087
8088
8089
8090
8091
8092
8093
8094
8095
8096
8097
8098
8099
8100
8101
8102
8103
8104
8105
8106
8107
8108
8109
8110
8111
8112
8113
8114
8115
8116
8117
8118
8119
8120
8121
8122
8123
8124
8125
8126
8127
8128
8129
8130
8131
8132
8133
8134
8135
8136
8137
8138
8139
8140
8141
8142
8143
8144
8145
8146
8147
8148
8149
8150
8151
8152
8153
8154
8155
8156
8157
8158
8159
8160
8161
8162
8163
8164
8165
8166
8167
8168
8169
8170
8171
8172
8173
8174
8175
8176
8177
8178
8179
8180
8181
8182
8183
8184
8185
8186
8187
8188
8189
8190
8191
8192
8193
8194
8195
8196
8197
8198
8199
8200
8201
8202
8203
8204
8205
8206
8207
8208
8209
8210
8211
8212
8213
8214
8215
8216
8217
8218
8219
8220
8221
8222
8223
8224
8225
8226
8227
8228
8229
8230
8231
8232
8233
8234
8235
8236
8237
8238
8239
8240
8241
8242
8243
8244
8245
8246
8247
8248
8249
8250
8251
8252
8253
8254
8255
8256
8257
8258
8259
8260
8261
8262
8263
8264
8265
8266
8267
8268
8269
8270
8271
8272
8273
8274
8275
8276
8277
8278
8279
8280
8281
8282
8283
8284
8285
8286
8287
8288
8289
8290
8291
8292
8293
8294
8295
8296
8297
8298
8299
8300
8301
8302
8303
8304
8305
8306
8307
8308
8309
8310
8311
8312
8313
8314
8315
8316
8317
8318
8319
8320
8321
8322
8323
8324
8325
8326
8327
8328
8329
8330
8331
8332
8333
8334
8335
8336
8337
8338
8339
8340
8341
8342
8343
8344
8345
8346
8347
8348
8349
8350
8351
8352
8353
8354
8355
8356
8357
8358
8359
8360
8361
8362
8363
8364
8365
8366
8367
8368
8369
8370
8371
8372
8373
8374
8375
8376
8377
8378
8379
8380
8381
8382
8383
8384
8385
8386
8387
8388
8389
8390
8391
8392
8393
8394
8395
8396
8397
8398
8399
8400
8401
8402
8403
8404
8405
8406
8407
8408
8409
8410
8411
8412
8413
8414
8415
8416
8417
8418
8419
8420
8421
8422
8423
8424
8425
8426
8427
8428
8429
8430
8431
8432
8433
8434
8435
8436
8437
8438
8439
8440
8441
8442
8443
8444
8445
8446
8447
8448
8449
8450
8451
8452
8453
8454
8455
8456
8457
8458
8459
8460
8461
8462
8463
8464
8465
8466
8467
8468
8469
8470
8471
8472
8473
8474
8475
8476
8477
8478
8479
8480
8481
8482
8483
8484
8485
8486
8487
8488
8489
8490
8491
8492
8493
8494
8495
8496
8497
8498
8499
8500
8501
8502
8503
8504
8505
8506
8507
8508
8509
8510
8511
8512
8513
8514
8515
8516
8517
8518
8519
8520
8521
8522
8523
8524
8525
8526
8527
8528
8529
8530
8531
8532
8533
8534
8535
8536
8537
8538
8539
8540
8541
8542
8543
8544
8545
8546
8547
8548
8549
8550
8551
8552
8553
8554
8555
8556
8557
8558
8559
8560
8561
8562
8563
8564
8565
8566
8567
8568
8569
8570
8571
8572
8573
8574
8575
8576
8577
8578
8579
8580
8581
8582
8583
8584
8585
8586
8587
8588
8589
8590
8591
8592
8593
8594
8595
8596
8597
8598
8599
8600
8601
8602
8603
8604
8605
8606
8607
8608
8609
8610
8611
8612
8613
8614
8615
8616
8617
8618
8619
8620
8621
8622
8623
8624
8625
8626
8627
8628
8629
8630
8631
8632
8633
8634
8635
8636
8637
8638
8639
8640
8641
8642
8643
8644
8645
8646
8647
8648
8649
8650
8651
8652
8653
8654
8655
8656
8657
8658
8659
8660
8661
8662
8663
8664
8665
8666
8667
8668
8669
8670
8671
8672
8673
8674
8675
8676
8677
8678
8679
8680
8681
8682
8683
8684
8685
8686
8687
8688
8689
8690
8691
8692
8693
8694
8695
8696
8697
8698
8699
8700
8701
8702
8703
8704
8705
8706
8707
8708
8709
8710
8711
8712
8713
8714
8715
8716
8717
8718
8719
8720
8721
8722
8723
8724
8725
8726
8727
8728
8729
8730
8731
8732
8733
8734
8735
8736
8737
8738
8739
8740
8741
8742
8743
8744
8745
8746
8747
8748
8749
8750
8751
8752
8753
8754
8755
8756
8757
8758
8759
8760
8761
8762
8763
8764
8765
8766
8767
8768
8769
8770
8771
8772
8773
8774
8775
8776
8777
8778
8779
8780
8781
8782
8783
8784
8785
8786
8787
8788
8789
8790
8791
8792
8793
8794
8795
8796
8797
/******************************************************************************
 *
 * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
 *
 * Portions of this file are derived from the ipw3945 project, as well
 * as portions of the ieee80211 subsystem header files.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/

/*
 * NOTE:  This file (iwl-base.c) is used to build to multiple hardware targets
 * by defining IWL to either 3945 or 4965.  The Makefile used when building
 * the base targets will create base-3945.o and base-4965.o
 *
 * The eventual goal is to move as many of the #if IWL / #endif blocks out of
 * this file and into the hardware specific implementation files (iwl-XXXX.c)
 * and leave only the common (non #ifdef sprinkled) code in this file
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/wireless.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>

#include <net/ieee80211_radiotap.h>
#include <net/mac80211.h>

#include <asm/div64.h>

#define IWL 3945

#include "iwlwifi.h"
#include "iwl-3945.h"
#include "iwl-helpers.h"

#ifdef CONFIG_IWLWIFI_DEBUG
u32 iwl_debug_level;
#endif

/******************************************************************************
 *
 * module boiler plate
 *
 ******************************************************************************/

/* module parameters */
int iwl_param_disable_hw_scan;
int iwl_param_debug;
int iwl_param_disable;      /* def: enable radio */
int iwl_param_antenna;      /* def: 0 = both antennas (use diversity) */
int iwl_param_hwcrypto;     /* def: using software encryption */
int iwl_param_qos_enable = 1;
int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;

/*
 * module name, copyright, version, etc.
 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
 */

#define DRV_DESCRIPTION	\
"Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"

#ifdef CONFIG_IWLWIFI_DEBUG
#define VD "d"
#else
#define VD
#endif

#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
#define VS "s"
#else
#define VS
#endif

#define IWLWIFI_VERSION "1.1.17k" VD VS
#define DRV_COPYRIGHT	"Copyright(c) 2003-2007 Intel Corporation"
#define DRV_VERSION     IWLWIFI_VERSION

/* Change firmware file name, using "-" and incrementing number,
 *   *only* when uCode interface or architecture changes so that it
 *   is not compatible with earlier drivers.
 * This number will also appear in << 8 position of 1st dword of uCode file */
#define IWL3945_UCODE_API "-1"

MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT);
MODULE_LICENSE("GPL");

__le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
{
	u16 fc = le16_to_cpu(hdr->frame_control);
	int hdr_len = ieee80211_get_hdrlen(fc);

	if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
		return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
	return NULL;
}

static const struct ieee80211_hw_mode *iwl_get_hw_mode(
		struct iwl_priv *priv, int mode)
{
	int i;

	for (i = 0; i < 3; i++)
		if (priv->modes[i].mode == mode)
			return &priv->modes[i];

	return NULL;
}

static int iwl_is_empty_essid(const char *essid, int essid_len)
{
	/* Single white space is for Linksys APs */
	if (essid_len == 1 && essid[0] == ' ')
		return 1;

	/* Otherwise, if the entire essid is 0, we assume it is hidden */
	while (essid_len) {
		essid_len--;
		if (essid[essid_len] != '\0')
			return 0;
	}

	return 1;
}

static const char *iwl_escape_essid(const char *essid, u8 essid_len)
{
	static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
	const char *s = essid;
	char *d = escaped;

	if (iwl_is_empty_essid(essid, essid_len)) {
		memcpy(escaped, "<hidden>", sizeof("<hidden>"));
		return escaped;
	}

	essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
	while (essid_len--) {
		if (*s == '\0') {
			*d++ = '\\';
			*d++ = '0';
			s++;
		} else
			*d++ = *s++;
	}
	*d = '\0';
	return escaped;
}

static void iwl_print_hex_dump(int level, void *p, u32 len)
{
#ifdef CONFIG_IWLWIFI_DEBUG
	if (!(iwl_debug_level & level))
		return;

	print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
			p, len, 1);
#endif
}

/*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 * DMA services
 *
 * Theory of operation
 *
 * A queue is a circular buffers with 'Read' and 'Write' pointers.
 * 2 empty entries always kept in the buffer to protect from overflow.
 *
 * For Tx queue, there are low mark and high mark limits. If, after queuing
 * the packet for Tx, free space become < low mark, Tx queue stopped. When
 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 * Tx queue resumed.
 *
 * The IWL operates with six queues, one receive queue in the device's
 * sram, one transmit queue for sending commands to the device firmware,
 * and four transmit queues for data.
 ***************************************************/

static int iwl_queue_space(const struct iwl_queue *q)
{
	int s = q->last_used - q->first_empty;

	if (q->last_used > q->first_empty)
		s -= q->n_bd;

	if (s <= 0)
		s += q->n_window;
	/* keep some reserve to not confuse empty and full situations */
	s -= 2;
	if (s < 0)
		s = 0;
	return s;
}

/* XXX: n_bd must be power-of-two size */
static inline int iwl_queue_inc_wrap(int index, int n_bd)
{
	return ++index & (n_bd - 1);
}

/* XXX: n_bd must be power-of-two size */
static inline int iwl_queue_dec_wrap(int index, int n_bd)
{
	return --index & (n_bd - 1);
}

static inline int x2_queue_used(const struct iwl_queue *q, int i)
{
	return q->first_empty > q->last_used ?
		(i >= q->last_used && i < q->first_empty) :
		!(i < q->last_used && i >= q->first_empty);
}

static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
{
	if (is_huge)
		return q->n_window;

	return index & (q->n_window - 1);
}

static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
			  int count, int slots_num, u32 id)
{
	q->n_bd = count;
	q->n_window = slots_num;
	q->id = id;

	/* count must be power-of-two size, otherwise iwl_queue_inc_wrap
	 * and iwl_queue_dec_wrap are broken. */
	BUG_ON(!is_power_of_2(count));

	/* slots_num must be power-of-two size, otherwise
	 * get_cmd_index is broken. */
	BUG_ON(!is_power_of_2(slots_num));

	q->low_mark = q->n_window / 4;
	if (q->low_mark < 4)
		q->low_mark = 4;

	q->high_mark = q->n_window / 8;
	if (q->high_mark < 2)
		q->high_mark = 2;

	q->first_empty = q->last_used = 0;

	return 0;
}

static int iwl_tx_queue_alloc(struct iwl_priv *priv,
			      struct iwl_tx_queue *txq, u32 id)
{
	struct pci_dev *dev = priv->pci_dev;

	if (id != IWL_CMD_QUEUE_NUM) {
		txq->txb = kmalloc(sizeof(txq->txb[0]) *
				   TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
		if (!txq->txb) {
			IWL_ERROR("kmalloc for auxilary BD "
				  "structures failed\n");
			goto error;
		}
	} else
		txq->txb = NULL;

	txq->bd = pci_alloc_consistent(dev,
			sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
			&txq->q.dma_addr);

	if (!txq->bd) {
		IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
			  sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
		goto error;
	}
	txq->q.id = id;

	return 0;

 error:
	if (txq->txb) {
		kfree(txq->txb);
		txq->txb = NULL;
	}

	return -ENOMEM;
}

int iwl_tx_queue_init(struct iwl_priv *priv,
		      struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
{
	struct pci_dev *dev = priv->pci_dev;
	int len;
	int rc = 0;

	/* alocate command space + one big command for scan since scan
	 * command is very huge the system will not have two scan at the
	 * same time */
	len = sizeof(struct iwl_cmd) * slots_num;
	if (txq_id == IWL_CMD_QUEUE_NUM)
		len +=  IWL_MAX_SCAN_SIZE;
	txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
	if (!txq->cmd)
		return -ENOMEM;

	rc = iwl_tx_queue_alloc(priv, txq, txq_id);
	if (rc) {
		pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);

		return -ENOMEM;
	}
	txq->need_update = 0;

	/* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
	 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
	BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
	iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);

	iwl_hw_tx_queue_init(priv, txq);

	return 0;
}

/**
 * iwl_tx_queue_free - Deallocate DMA queue.
 * @txq: Transmit queue to deallocate.
 *
 * Empty queue by removing and destroying all BD's.
 * Free all buffers.  txq itself is not freed.
 *
 */
void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
{
	struct iwl_queue *q = &txq->q;
	struct pci_dev *dev = priv->pci_dev;
	int len;

	if (q->n_bd == 0)
		return;

	/* first, empty all BD's */
	for (; q->first_empty != q->last_used;
	     q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
		iwl_hw_txq_free_tfd(priv, txq);

	len = sizeof(struct iwl_cmd) * q->n_window;
	if (q->id == IWL_CMD_QUEUE_NUM)
		len += IWL_MAX_SCAN_SIZE;

	pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);

	/* free buffers belonging to queue itself */
	if (txq->q.n_bd)
		pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
				    txq->q.n_bd, txq->bd, txq->q.dma_addr);

	if (txq->txb) {
		kfree(txq->txb);
		txq->txb = NULL;
	}

	/* 0 fill whole structure */
	memset(txq, 0, sizeof(*txq));
}

const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };

/*************** STATION TABLE MANAGEMENT ****
 *
 * NOTE:  This needs to be overhauled to better synchronize between
 * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
 *
 * mac80211 should also be examined to determine if sta_info is duplicating
 * the functionality provided here
 */

/**************************************************************/
#if 0 /* temparary disable till we add real remove station */
static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
{
	int index = IWL_INVALID_STATION;
	int i;
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_lock, flags);

	if (is_ap)
		index = IWL_AP_ID;
	else if (is_broadcast_ether_addr(addr))
		index = priv->hw_setting.bcast_sta_id;
	else
		for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
			if (priv->stations[i].used &&
			    !compare_ether_addr(priv->stations[i].sta.sta.addr,
						addr)) {
				index = i;
				break;
			}

	if (unlikely(index == IWL_INVALID_STATION))
		goto out;

	if (priv->stations[index].used) {
		priv->stations[index].used = 0;
		priv->num_stations--;
	}

	BUG_ON(priv->num_stations < 0);

out:
	spin_unlock_irqrestore(&priv->sta_lock, flags);
	return 0;
}
#endif
static void iwl_clear_stations_table(struct iwl_priv *priv)
{
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_lock, flags);

	priv->num_stations = 0;
	memset(priv->stations, 0, sizeof(priv->stations));

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


u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
{
	int i;
	int index = IWL_INVALID_STATION;
	struct iwl_station_entry *station;
	unsigned long flags_spin;
	DECLARE_MAC_BUF(mac);
	u8 rate;

	spin_lock_irqsave(&priv->sta_lock, flags_spin);
	if (is_ap)
		index = IWL_AP_ID;
	else if (is_broadcast_ether_addr(addr))
		index = priv->hw_setting.bcast_sta_id;
	else
		for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
			if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
						addr)) {
				index = i;
				break;
			}

			if (!priv->stations[i].used &&
			    index == IWL_INVALID_STATION)
				index = i;
		}

	/* These twh conditions has the same outcome but keep them separate
	  since they have different meaning */
	if (unlikely(index == IWL_INVALID_STATION)) {
		spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
		return index;
	}

	if (priv->stations[index].used &&
	   !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
		spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
		return index;
	}

	IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
	station = &priv->stations[index];
	station->used = 1;
	priv->num_stations++;

	memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
	memcpy(station->sta.sta.addr, addr, ETH_ALEN);
	station->sta.mode = 0;
	station->sta.sta.sta_id = index;
	station->sta.station_flags = 0;

	rate = (priv->phymode == MODE_IEEE80211A) ? IWL_RATE_6M_PLCP :
				IWL_RATE_1M_PLCP | priv->hw_setting.cck_flag;

	/* Turn on both antennas for the station... */
	station->sta.rate_n_flags =
			iwl_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
	station->current_rate.rate_n_flags =
			le16_to_cpu(station->sta.rate_n_flags);

	spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
	iwl_send_add_station(priv, &station->sta, flags);
	return index;

}

/*************** DRIVER STATUS FUNCTIONS   *****/

static inline int iwl_is_ready(struct iwl_priv *priv)
{
	/* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
	 * set but EXIT_PENDING is not */
	return test_bit(STATUS_READY, &priv->status) &&
	       test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
	       !test_bit(STATUS_EXIT_PENDING, &priv->status);
}

static inline int iwl_is_alive(struct iwl_priv *priv)
{
	return test_bit(STATUS_ALIVE, &priv->status);
}

static inline int iwl_is_init(struct iwl_priv *priv)
{
	return test_bit(STATUS_INIT, &priv->status);
}

static inline int iwl_is_rfkill(struct iwl_priv *priv)
{
	return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
	       test_bit(STATUS_RF_KILL_SW, &priv->status);
}

static inline int iwl_is_ready_rf(struct iwl_priv *priv)
{

	if (iwl_is_rfkill(priv))
		return 0;

	return iwl_is_ready(priv);
}

/*************** HOST COMMAND QUEUE FUNCTIONS   *****/

#define IWL_CMD(x) case x : return #x

static const char *get_cmd_string(u8 cmd)
{
	switch (cmd) {
		IWL_CMD(REPLY_ALIVE);
		IWL_CMD(REPLY_ERROR);
		IWL_CMD(REPLY_RXON);
		IWL_CMD(REPLY_RXON_ASSOC);
		IWL_CMD(REPLY_QOS_PARAM);
		IWL_CMD(REPLY_RXON_TIMING);
		IWL_CMD(REPLY_ADD_STA);
		IWL_CMD(REPLY_REMOVE_STA);
		IWL_CMD(REPLY_REMOVE_ALL_STA);
		IWL_CMD(REPLY_3945_RX);
		IWL_CMD(REPLY_TX);
		IWL_CMD(REPLY_RATE_SCALE);
		IWL_CMD(REPLY_LEDS_CMD);
		IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
		IWL_CMD(RADAR_NOTIFICATION);
		IWL_CMD(REPLY_QUIET_CMD);
		IWL_CMD(REPLY_CHANNEL_SWITCH);
		IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
		IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
		IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
		IWL_CMD(POWER_TABLE_CMD);
		IWL_CMD(PM_SLEEP_NOTIFICATION);
		IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
		IWL_CMD(REPLY_SCAN_CMD);
		IWL_CMD(REPLY_SCAN_ABORT_CMD);
		IWL_CMD(SCAN_START_NOTIFICATION);
		IWL_CMD(SCAN_RESULTS_NOTIFICATION);
		IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
		IWL_CMD(BEACON_NOTIFICATION);
		IWL_CMD(REPLY_TX_BEACON);
		IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
		IWL_CMD(QUIET_NOTIFICATION);
		IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
		IWL_CMD(MEASURE_ABORT_NOTIFICATION);
		IWL_CMD(REPLY_BT_CONFIG);
		IWL_CMD(REPLY_STATISTICS_CMD);
		IWL_CMD(STATISTICS_NOTIFICATION);
		IWL_CMD(REPLY_CARD_STATE_CMD);
		IWL_CMD(CARD_STATE_NOTIFICATION);
		IWL_CMD(MISSED_BEACONS_NOTIFICATION);
	default:
		return "UNKNOWN";

	}
}

#define HOST_COMPLETE_TIMEOUT (HZ / 2)

/**
 * iwl_enqueue_hcmd - enqueue a uCode command
 * @priv: device private data point
 * @cmd: a point to the ucode command structure
 *
 * The function returns < 0 values to indicate the operation is
 * failed. On success, it turns the index (> 0) of command in the
 * command queue.
 */
static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
	struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
	struct iwl_queue *q = &txq->q;
	struct iwl_tfd_frame *tfd;
	u32 *control_flags;
	struct iwl_cmd *out_cmd;
	u32 idx;
	u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
	dma_addr_t phys_addr;
	int pad;
	u16 count;
	int ret;
	unsigned long flags;

	/* If any of the command structures end up being larger than
	 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
	 * we will need to increase the size of the TFD entries */
	BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
	       !(cmd->meta.flags & CMD_SIZE_HUGE));

	if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
		IWL_ERROR("No space for Tx\n");
		return -ENOSPC;
	}

	spin_lock_irqsave(&priv->hcmd_lock, flags);

	tfd = &txq->bd[q->first_empty];
	memset(tfd, 0, sizeof(*tfd));

	control_flags = (u32 *) tfd;

	idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
	out_cmd = &txq->cmd[idx];

	out_cmd->hdr.cmd = cmd->id;
	memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
	memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);

	/* At this point, the out_cmd now has all of the incoming cmd
	 * information */

	out_cmd->hdr.flags = 0;
	out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
			INDEX_TO_SEQ(q->first_empty));
	if (out_cmd->meta.flags & CMD_SIZE_HUGE)
		out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);

	phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
			offsetof(struct iwl_cmd, hdr);
	iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);

	pad = U32_PAD(cmd->len);
	count = TFD_CTL_COUNT_GET(*control_flags);
	*control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);

	IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
		     "%d bytes at %d[%d]:%d\n",
		     get_cmd_string(out_cmd->hdr.cmd),
		     out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
		     fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);

	txq->need_update = 1;
	q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
	ret = iwl_tx_queue_update_write_ptr(priv, txq);

	spin_unlock_irqrestore(&priv->hcmd_lock, flags);
	return ret ? ret : idx;
}

int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
	int ret;

	BUG_ON(!(cmd->meta.flags & CMD_ASYNC));

	/* An asynchronous command can not expect an SKB to be set. */
	BUG_ON(cmd->meta.flags & CMD_WANT_SKB);

	/* An asynchronous command MUST have a callback. */
	BUG_ON(!cmd->meta.u.callback);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return -EBUSY;

	ret = iwl_enqueue_hcmd(priv, cmd);
	if (ret < 0) {
		IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
			  get_cmd_string(cmd->id), ret);
		return ret;
	}
	return 0;
}

int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
	int cmd_idx;
	int ret;
	static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */

	BUG_ON(cmd->meta.flags & CMD_ASYNC);

	 /* A synchronous command can not have a callback set. */
	BUG_ON(cmd->meta.u.callback != NULL);

	if (atomic_xchg(&entry, 1)) {
		IWL_ERROR("Error sending %s: Already sending a host command\n",
			  get_cmd_string(cmd->id));
		return -EBUSY;
	}

	set_bit(STATUS_HCMD_ACTIVE, &priv->status);

	if (cmd->meta.flags & CMD_WANT_SKB)
		cmd->meta.source = &cmd->meta;

	cmd_idx = iwl_enqueue_hcmd(priv, cmd);
	if (cmd_idx < 0) {
		ret = cmd_idx;
		IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
			  get_cmd_string(cmd->id), ret);
		goto out;
	}

	ret = wait_event_interruptible_timeout(priv->wait_command_queue,
			!test_bit(STATUS_HCMD_ACTIVE, &priv->status),
			HOST_COMPLETE_TIMEOUT);
	if (!ret) {
		if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
			IWL_ERROR("Error sending %s: time out after %dms.\n",
				  get_cmd_string(cmd->id),
				  jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));

			clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
			ret = -ETIMEDOUT;
			goto cancel;
		}
	}

	if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
		IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
			       get_cmd_string(cmd->id));
		ret = -ECANCELED;
		goto fail;
	}
	if (test_bit(STATUS_FW_ERROR, &priv->status)) {
		IWL_DEBUG_INFO("Command %s failed: FW Error\n",
			       get_cmd_string(cmd->id));
		ret = -EIO;
		goto fail;
	}
	if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
		IWL_ERROR("Error: Response NULL in '%s'\n",
			  get_cmd_string(cmd->id));
		ret = -EIO;
		goto out;
	}

	ret = 0;
	goto out;

cancel:
	if (cmd->meta.flags & CMD_WANT_SKB) {
		struct iwl_cmd *qcmd;

		/* Cancel the CMD_WANT_SKB flag for the cmd in the
		 * TX cmd queue. Otherwise in case the cmd comes
		 * in later, it will possibly set an invalid
		 * address (cmd->meta.source). */
		qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
		qcmd->meta.flags &= ~CMD_WANT_SKB;
	}
fail:
	if (cmd->meta.u.skb) {
		dev_kfree_skb_any(cmd->meta.u.skb);
		cmd->meta.u.skb = NULL;
	}
out:
	atomic_set(&entry, 0);
	return ret;
}

int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
	/* A command can not be asynchronous AND expect an SKB to be set. */
	BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
	       (cmd->meta.flags & CMD_WANT_SKB));

	if (cmd->meta.flags & CMD_ASYNC)
		return iwl_send_cmd_async(priv, cmd);

	return iwl_send_cmd_sync(priv, cmd);
}

int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
{
	struct iwl_host_cmd cmd = {
		.id = id,
		.len = len,
		.data = data,
	};

	return iwl_send_cmd_sync(priv, &cmd);
}

static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
{
	struct iwl_host_cmd cmd = {
		.id = id,
		.len = sizeof(val),
		.data = &val,
	};

	return iwl_send_cmd_sync(priv, &cmd);
}

int iwl_send_statistics_request(struct iwl_priv *priv)
{
	return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
}

/**
 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 * @channel: Any channel valid for the requested phymode

 * In addition to setting the staging RXON, priv->phymode is also set.
 *
 * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 * in the staging RXON flag structure based on the phymode
 */
static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
{
	if (!iwl_get_channel_info(priv, phymode, channel)) {
		IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
			       channel, phymode);
		return -EINVAL;
	}

	if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
	    (priv->phymode == phymode))
		return 0;

	priv->staging_rxon.channel = cpu_to_le16(channel);
	if (phymode == MODE_IEEE80211A)
		priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
	else
		priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;

	priv->phymode = phymode;

	IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);

	return 0;
}

/**
 * iwl_check_rxon_cmd - validate RXON structure is valid
 *
 * NOTE:  This is really only useful during development and can eventually
 * be #ifdef'd out once the driver is stable and folks aren't actively
 * making changes
 */
static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
{
	int error = 0;
	int counter = 1;

	if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
		error |= le32_to_cpu(rxon->flags &
				(RXON_FLG_TGJ_NARROW_BAND_MSK |
				 RXON_FLG_RADAR_DETECT_MSK));
		if (error)
			IWL_WARNING("check 24G fields %d | %d\n",
				    counter++, error);
	} else {
		error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
				0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
		if (error)
			IWL_WARNING("check 52 fields %d | %d\n",
				    counter++, error);
		error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
		if (error)
			IWL_WARNING("check 52 CCK %d | %d\n",
				    counter++, error);
	}
	error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
	if (error)
		IWL_WARNING("check mac addr %d | %d\n", counter++, error);

	/* make sure basic rates 6Mbps and 1Mbps are supported */
	error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
		  ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
	if (error)
		IWL_WARNING("check basic rate %d | %d\n", counter++, error);

	error |= (le16_to_cpu(rxon->assoc_id) > 2007);
	if (error)
		IWL_WARNING("check assoc id %d | %d\n", counter++, error);

	error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
			== (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
	if (error)
		IWL_WARNING("check CCK and short slot %d | %d\n",
			    counter++, error);

	error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
			== (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
	if (error)
		IWL_WARNING("check CCK & auto detect %d | %d\n",
			    counter++, error);

	error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
			RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
	if (error)
		IWL_WARNING("check TGG and auto detect %d | %d\n",
			    counter++, error);

	if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
		error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
				RXON_FLG_ANT_A_MSK)) == 0);
	if (error)
		IWL_WARNING("check antenna %d %d\n", counter++, error);

	if (error)
		IWL_WARNING("Tuning to channel %d\n",
			    le16_to_cpu(rxon->channel));

	if (error) {
		IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
		return -1;
	}
	return 0;
}

/**
 * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
 * @priv: staging_rxon is comapred to active_rxon
 *
 * If the RXON structure is changing sufficient to require a new
 * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
 * to indicate a new tune is required.
 */
static int iwl_full_rxon_required(struct iwl_priv *priv)
{

	/* These items are only settable from the full RXON command */
	if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
	    compare_ether_addr(priv->staging_rxon.bssid_addr,
			       priv->active_rxon.bssid_addr) ||
	    compare_ether_addr(priv->staging_rxon.node_addr,
			       priv->active_rxon.node_addr) ||
	    compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
			       priv->active_rxon.wlap_bssid_addr) ||
	    (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
	    (priv->staging_rxon.channel != priv->active_rxon.channel) ||
	    (priv->staging_rxon.air_propagation !=
	     priv->active_rxon.air_propagation) ||
	    (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
		return 1;

	/* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
	 * be updated with the RXON_ASSOC command -- however only some
	 * flag transitions are allowed using RXON_ASSOC */

	/* Check if we are not switching bands */
	if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
	    (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
		return 1;

	/* Check if we are switching association toggle */
	if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
		(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
		return 1;

	return 0;
}

static int iwl_send_rxon_assoc(struct iwl_priv *priv)
{
	int rc = 0;
	struct iwl_rx_packet *res = NULL;
	struct iwl_rxon_assoc_cmd rxon_assoc;
	struct iwl_host_cmd cmd = {
		.id = REPLY_RXON_ASSOC,
		.len = sizeof(rxon_assoc),
		.meta.flags = CMD_WANT_SKB,
		.data = &rxon_assoc,
	};
	const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
	const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;

	if ((rxon1->flags == rxon2->flags) &&
	    (rxon1->filter_flags == rxon2->filter_flags) &&
	    (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
	    (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
		IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
		return 0;
	}

	rxon_assoc.flags = priv->staging_rxon.flags;
	rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
	rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
	rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
	rxon_assoc.reserved = 0;

	rc = iwl_send_cmd_sync(priv, &cmd);
	if (rc)
		return rc;

	res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
		rc = -EIO;
	}

	priv->alloc_rxb_skb--;
	dev_kfree_skb_any(cmd.meta.u.skb);

	return rc;
}

/**
 * iwl_commit_rxon - commit staging_rxon to hardware
 *
 * The RXON command in staging_rxon is commited to the hardware and
 * the active_rxon structure is updated with the new data.  This
 * function correctly transitions out of the RXON_ASSOC_MSK state if
 * a HW tune is required based on the RXON structure changes.
 */
static int iwl_commit_rxon(struct iwl_priv *priv)
{
	/* cast away the const for active_rxon in this function */
	struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
	int rc = 0;
	DECLARE_MAC_BUF(mac);

	if (!iwl_is_alive(priv))
		return -1;

	/* always get timestamp with Rx frame */
	priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;

	/* select antenna */
	priv->staging_rxon.flags &=
	    ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
	priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);

	rc = iwl_check_rxon_cmd(&priv->staging_rxon);
	if (rc) {
		IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
		return -EINVAL;
	}

	/* If we don't need to send a full RXON, we can use
	 * iwl_rxon_assoc_cmd which is used to reconfigure filter
	 * and other flags for the current radio configuration. */
	if (!iwl_full_rxon_required(priv)) {
		rc = iwl_send_rxon_assoc(priv);
		if (rc) {
			IWL_ERROR("Error setting RXON_ASSOC "
				  "configuration (%d).\n", rc);
			return rc;
		}

		memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));

		return 0;
	}

	/* If we are currently associated and the new config requires
	 * an RXON_ASSOC and the new config wants the associated mask enabled,
	 * we must clear the associated from the active configuration
	 * before we apply the new config */
	if (iwl_is_associated(priv) &&
	    (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
		IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
		active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;

		rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
				      sizeof(struct iwl_rxon_cmd),
				      &priv->active_rxon);

		/* If the mask clearing failed then we set
		 * active_rxon back to what it was previously */
		if (rc) {
			active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
			IWL_ERROR("Error clearing ASSOC_MSK on current "
				  "configuration (%d).\n", rc);
			return rc;
		}
	}

	IWL_DEBUG_INFO("Sending RXON\n"
		       "* with%s RXON_FILTER_ASSOC_MSK\n"
		       "* channel = %d\n"
		       "* bssid = %s\n",
		       ((priv->staging_rxon.filter_flags &
			 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
		       le16_to_cpu(priv->staging_rxon.channel),
		       print_mac(mac, priv->staging_rxon.bssid_addr));

	/* Apply the new configuration */
	rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
			      sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
	if (rc) {
		IWL_ERROR("Error setting new configuration (%d).\n", rc);
		return rc;
	}

	memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));

	iwl_clear_stations_table(priv);

	/* If we issue a new RXON command which required a tune then we must
	 * send a new TXPOWER command or we won't be able to Tx any frames */
	rc = iwl_hw_reg_send_txpower(priv);
	if (rc) {
		IWL_ERROR("Error setting Tx power (%d).\n", rc);
		return rc;
	}

	/* Add the broadcast address so we can send broadcast frames */
	if (iwl_add_station(priv, BROADCAST_ADDR, 0, 0) ==
	    IWL_INVALID_STATION) {
		IWL_ERROR("Error adding BROADCAST address for transmit.\n");
		return -EIO;
	}

	/* If we have set the ASSOC_MSK and we are in BSS mode then
	 * add the IWL_AP_ID to the station rate table */
	if (iwl_is_associated(priv) &&
	    (priv->iw_mode == IEEE80211_IF_TYPE_STA))
		if (iwl_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
		    == IWL_INVALID_STATION) {
			IWL_ERROR("Error adding AP address for transmit.\n");
			return -EIO;
		}

	/* Init the hardware's rate fallback order based on the
	 * phymode */
	rc = iwl3945_init_hw_rate_table(priv);
	if (rc) {
		IWL_ERROR("Error setting HW rate table: %02X\n", rc);
		return -EIO;
	}

	return 0;
}

static int iwl_send_bt_config(struct iwl_priv *priv)
{
	struct iwl_bt_cmd bt_cmd = {
		.flags = 3,
		.lead_time = 0xAA,
		.max_kill = 1,
		.kill_ack_mask = 0,
		.kill_cts_mask = 0,
	};

	return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
				sizeof(struct iwl_bt_cmd), &bt_cmd);
}

static int iwl_send_scan_abort(struct iwl_priv *priv)
{
	int rc = 0;
	struct iwl_rx_packet *res;
	struct iwl_host_cmd cmd = {
		.id = REPLY_SCAN_ABORT_CMD,
		.meta.flags = CMD_WANT_SKB,
	};

	/* If there isn't a scan actively going on in the hardware
	 * then we are in between scan bands and not actually
	 * actively scanning, so don't send the abort command */
	if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
		return 0;
	}

	rc = iwl_send_cmd_sync(priv, &cmd);
	if (rc) {
		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
		return rc;
	}

	res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
	if (res->u.status != CAN_ABORT_STATUS) {
		/* The scan abort will return 1 for success or
		 * 2 for "failure".  A failure condition can be
		 * due to simply not being in an active scan which
		 * can occur if we send the scan abort before we
		 * the microcode has notified us that a scan is
		 * completed. */
		IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
		clear_bit(STATUS_SCAN_HW, &priv->status);
	}

	dev_kfree_skb_any(cmd.meta.u.skb);

	return rc;
}

static int iwl_card_state_sync_callback(struct iwl_priv *priv,
					struct iwl_cmd *cmd,
					struct sk_buff *skb)
{
	return 1;
}

/*
 * CARD_STATE_CMD
 *
 * Use: Sets the internal card state to enable, disable, or halt
 *
 * When in the 'enable' state the card operates as normal.
 * When in the 'disable' state, the card enters into a low power mode.
 * When in the 'halt' state, the card is shut down and must be fully
 * restarted to come back on.
 */
static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
{
	struct iwl_host_cmd cmd = {
		.id = REPLY_CARD_STATE_CMD,
		.len = sizeof(u32),
		.data = &flags,
		.meta.flags = meta_flag,
	};

	if (meta_flag & CMD_ASYNC)
		cmd.meta.u.callback = iwl_card_state_sync_callback;

	return iwl_send_cmd(priv, &cmd);
}

static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
				     struct iwl_cmd *cmd, struct sk_buff *skb)
{
	struct iwl_rx_packet *res = NULL;

	if (!skb) {
		IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
		return 1;
	}

	res = (struct iwl_rx_packet *)skb->data;
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
			  res->hdr.flags);
		return 1;
	}

	switch (res->u.add_sta.status) {
	case ADD_STA_SUCCESS_MSK:
		break;
	default:
		break;
	}

	/* We didn't cache the SKB; let the caller free it */
	return 1;
}

int iwl_send_add_station(struct iwl_priv *priv,
			 struct iwl_addsta_cmd *sta, u8 flags)
{
	struct iwl_rx_packet *res = NULL;
	int rc = 0;
	struct iwl_host_cmd cmd = {
		.id = REPLY_ADD_STA,
		.len = sizeof(struct iwl_addsta_cmd),
		.meta.flags = flags,
		.data = sta,
	};

	if (flags & CMD_ASYNC)
		cmd.meta.u.callback = iwl_add_sta_sync_callback;
	else
		cmd.meta.flags |= CMD_WANT_SKB;

	rc = iwl_send_cmd(priv, &cmd);

	if (rc || (flags & CMD_ASYNC))
		return rc;

	res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
			  res->hdr.flags);
		rc = -EIO;
	}

	if (rc == 0) {
		switch (res->u.add_sta.status) {
		case ADD_STA_SUCCESS_MSK:
			IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
			break;
		default:
			rc = -EIO;
			IWL_WARNING("REPLY_ADD_STA failed\n");
			break;
		}
	}

	priv->alloc_rxb_skb--;
	dev_kfree_skb_any(cmd.meta.u.skb);

	return rc;
}

static int iwl_update_sta_key_info(struct iwl_priv *priv,
				   struct ieee80211_key_conf *keyconf,
				   u8 sta_id)
{
	unsigned long flags;
	__le16 key_flags = 0;

	switch (keyconf->alg) {
	case ALG_CCMP:
		key_flags |= STA_KEY_FLG_CCMP;
		key_flags |= cpu_to_le16(
				keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
		key_flags &= ~STA_KEY_FLG_INVALID;
		break;
	case ALG_TKIP:
	case ALG_WEP:
		return -EINVAL;
	default:
		return -EINVAL;
	}
	spin_lock_irqsave(&priv->sta_lock, flags);
	priv->stations[sta_id].keyinfo.alg = keyconf->alg;
	priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
	memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
	       keyconf->keylen);

	memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
	       keyconf->keylen);
	priv->stations[sta_id].sta.key.key_flags = key_flags;
	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;

	spin_unlock_irqrestore(&priv->sta_lock, flags);

	IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
	iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
	return 0;
}

static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
{
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_lock, flags);
	memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
	memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
	priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
	spin_unlock_irqrestore(&priv->sta_lock, flags);

	IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
	iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
	return 0;
}

static void iwl_clear_free_frames(struct iwl_priv *priv)
{
	struct list_head *element;

	IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
		       priv->frames_count);

	while (!list_empty(&priv->free_frames)) {
		element = priv->free_frames.next;
		list_del(element);
		kfree(list_entry(element, struct iwl_frame, list));
		priv->frames_count--;
	}

	if (priv->frames_count) {
		IWL_WARNING("%d frames still in use.  Did we lose one?\n",
			    priv->frames_count);
		priv->frames_count = 0;
	}
}

static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
{
	struct iwl_frame *frame;
	struct list_head *element;
	if (list_empty(&priv->free_frames)) {
		frame = kzalloc(sizeof(*frame), GFP_KERNEL);
		if (!frame) {
			IWL_ERROR("Could not allocate frame!\n");
			return NULL;
		}

		priv->frames_count++;
		return frame;
	}

	element = priv->free_frames.next;
	list_del(element);
	return list_entry(element, struct iwl_frame, list);
}

static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
{
	memset(frame, 0, sizeof(*frame));
	list_add(&frame->list, &priv->free_frames);
}

unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
				struct ieee80211_hdr *hdr,
				const u8 *dest, int left)
{

	if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
	    ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
	     (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
		return 0;

	if (priv->ibss_beacon->len > left)
		return 0;

	memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);

	return priv->ibss_beacon->len;
}

static int iwl_rate_index_from_plcp(int plcp)
{
	int i = 0;

	for (i = 0; i < IWL_RATE_COUNT; i++)
		if (iwl_rates[i].plcp == plcp)
			return i;
	return -1;
}

static u8 iwl_rate_get_lowest_plcp(int rate_mask)
{
	u8 i;

	for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
	     i = iwl_rates[i].next_ieee) {
		if (rate_mask & (1 << i))
			return iwl_rates[i].plcp;
	}

	return IWL_RATE_INVALID;
}

static int iwl_send_beacon_cmd(struct iwl_priv *priv)
{
	struct iwl_frame *frame;
	unsigned int frame_size;
	int rc;
	u8 rate;

	frame = iwl_get_free_frame(priv);

	if (!frame) {
		IWL_ERROR("Could not obtain free frame buffer for beacon "
			  "command.\n");
		return -ENOMEM;
	}

	if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
		rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
						0xFF0);
		if (rate == IWL_INVALID_RATE)
			rate = IWL_RATE_6M_PLCP;
	} else {
		rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
		if (rate == IWL_INVALID_RATE)
			rate = IWL_RATE_1M_PLCP;
	}

	frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);

	rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
			      &frame->u.cmd[0]);

	iwl_free_frame(priv, frame);

	return rc;
}

/******************************************************************************
 *
 * EEPROM related functions
 *
 ******************************************************************************/

static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
{
	memcpy(mac, priv->eeprom.mac_address, 6);
}

/**
 * iwl_eeprom_init - read EEPROM contents
 *
 * Load the EEPROM from adapter into priv->eeprom
 *
 * NOTE:  This routine uses the non-debug IO access functions.
 */
int iwl_eeprom_init(struct iwl_priv *priv)
{
	u16 *e = (u16 *)&priv->eeprom;
	u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
	u32 r;
	int sz = sizeof(priv->eeprom);
	int rc;
	int i;
	u16 addr;

	/* The EEPROM structure has several padding buffers within it
	 * and when adding new EEPROM maps is subject to programmer errors
	 * which may be very difficult to identify without explicitly
	 * checking the resulting size of the eeprom map. */
	BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);

	if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
		IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
		return -ENOENT;
	}

	rc = iwl_eeprom_aqcuire_semaphore(priv);
	if (rc < 0) {
		IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
		return -ENOENT;
	}

	/* eeprom is an array of 16bit values */
	for (addr = 0; addr < sz; addr += sizeof(u16)) {
		_iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
		_iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);

		for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
					i += IWL_EEPROM_ACCESS_DELAY) {
			r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
			if (r & CSR_EEPROM_REG_READ_VALID_MSK)
				break;
			udelay(IWL_EEPROM_ACCESS_DELAY);
		}

		if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
			IWL_ERROR("Time out reading EEPROM[%d]", addr);
			return -ETIMEDOUT;
		}
		e[addr / 2] = le16_to_cpu(r >> 16);
	}

	return 0;
}

/******************************************************************************
 *
 * Misc. internal state and helper functions
 *
 ******************************************************************************/
#ifdef CONFIG_IWLWIFI_DEBUG

/**
 * iwl_report_frame - dump frame to syslog during debug sessions
 *
 * hack this function to show different aspects of received frames,
 * including selective frame dumps.
 * group100 parameter selects whether to show 1 out of 100 good frames.
 *
 * TODO:  ieee80211_hdr stuff is common to 3945 and 4965, so frame type
 *        info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
 *        is 3945-specific and gives bad output for 4965.  Need to split the
 *        functionality, keep common stuff here.
 */
void iwl_report_frame(struct iwl_priv *priv,
		      struct iwl_rx_packet *pkt,
		      struct ieee80211_hdr *header, int group100)
{
	u32 to_us;
	u32 print_summary = 0;
	u32 print_dump = 0;	/* set to 1 to dump all frames' contents */
	u32 hundred = 0;
	u32 dataframe = 0;
	u16 fc;
	u16 seq_ctl;
	u16 channel;
	u16 phy_flags;
	int rate_sym;
	u16 length;
	u16 status;
	u16 bcn_tmr;
	u32 tsf_low;
	u64 tsf;
	u8 rssi;
	u8 agc;
	u16 sig_avg;
	u16 noise_diff;
	struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
	struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
	struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
	u8 *data = IWL_RX_DATA(pkt);

	/* MAC header */
	fc = le16_to_cpu(header->frame_control);
	seq_ctl = le16_to_cpu(header->seq_ctrl);

	/* metadata */
	channel = le16_to_cpu(rx_hdr->channel);
	phy_flags = le16_to_cpu(rx_hdr->phy_flags);
	rate_sym = rx_hdr->rate;
	length = le16_to_cpu(rx_hdr->len);

	/* end-of-frame status and timestamp */
	status = le32_to_cpu(rx_end->status);
	bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
	tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
	tsf = le64_to_cpu(rx_end->timestamp);

	/* signal statistics */
	rssi = rx_stats->rssi;
	agc = rx_stats->agc;
	sig_avg = le16_to_cpu(rx_stats->sig_avg);
	noise_diff = le16_to_cpu(rx_stats->noise_diff);

	to_us = !compare_ether_addr(header->addr1, priv->mac_addr);

	/* if data frame is to us and all is good,
	 *   (optionally) print summary for only 1 out of every 100 */
	if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
	    (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
		dataframe = 1;
		if (!group100)
			print_summary = 1;	/* print each frame */
		else if (priv->framecnt_to_us < 100) {
			priv->framecnt_to_us++;
			print_summary = 0;
		} else {
			priv->framecnt_to_us = 0;
			print_summary = 1;
			hundred = 1;
		}
	} else {
		/* print summary for all other frames */
		print_summary = 1;
	}

	if (print_summary) {
		char *title;
		u32 rate;

		if (hundred)
			title = "100Frames";
		else if (fc & IEEE80211_FCTL_RETRY)
			title = "Retry";
		else if (ieee80211_is_assoc_response(fc))
			title = "AscRsp";
		else if (ieee80211_is_reassoc_response(fc))
			title = "RasRsp";
		else if (ieee80211_is_probe_response(fc)) {
			title = "PrbRsp";
			print_dump = 1;	/* dump frame contents */
		} else if (ieee80211_is_beacon(fc)) {
			title = "Beacon";
			print_dump = 1;	/* dump frame contents */
		} else if (ieee80211_is_atim(fc))
			title = "ATIM";
		else if (ieee80211_is_auth(fc))
			title = "Auth";
		else if (ieee80211_is_deauth(fc))
			title = "DeAuth";
		else if (ieee80211_is_disassoc(fc))
			title = "DisAssoc";
		else
			title = "Frame";

		rate = iwl_rate_index_from_plcp(rate_sym);
		if (rate == -1)
			rate = 0;
		else
			rate = iwl_rates[rate].ieee / 2;

		/* print frame summary.
		 * MAC addresses show just the last byte (for brevity),
		 *    but you can hack it to show more, if you'd like to. */
		if (dataframe)
			IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
				     "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
				     title, fc, header->addr1[5],
				     length, rssi, channel, rate);
		else {
			/* src/dst addresses assume managed mode */
			IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
				     "src=0x%02x, rssi=%u, tim=%lu usec, "
				     "phy=0x%02x, chnl=%d\n",
				     title, fc, header->addr1[5],
				     header->addr3[5], rssi,
				     tsf_low - priv->scan_start_tsf,
				     phy_flags, channel);
		}
	}
	if (print_dump)
		iwl_print_hex_dump(IWL_DL_RX, data, length);
}
#endif

static void iwl_unset_hw_setting(struct iwl_priv *priv)
{
	if (priv->hw_setting.shared_virt)
		pci_free_consistent(priv->pci_dev,
				    sizeof(struct iwl_shared),
				    priv->hw_setting.shared_virt,
				    priv->hw_setting.shared_phys);
}

/**
 * iwl_supported_rate_to_ie - fill in the supported rate in IE field
 *
 * return : set the bit for each supported rate insert in ie
 */
static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
				    u16 basic_rate, int *left)
{
	u16 ret_rates = 0, bit;
	int i;
	u8 *cnt = ie;
	u8 *rates = ie + 1;

	for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
		if (bit & supported_rate) {
			ret_rates |= bit;
			rates[*cnt] = iwl_rates[i].ieee |
				((bit & basic_rate) ? 0x80 : 0x00);
			(*cnt)++;
			(*left)--;
			if ((*left <= 0) ||
			    (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
				break;
		}
	}

	return ret_rates;
}

/**
 * iwl_fill_probe_req - fill in all required fields and IE for probe request
 */
static u16 iwl_fill_probe_req(struct iwl_priv *priv,
			      struct ieee80211_mgmt *frame,
			      int left, int is_direct)
{
	int len = 0;
	u8 *pos = NULL;
	u16 active_rates, ret_rates, cck_rates;

	/* Make sure there is enough space for the probe request,
	 * two mandatory IEs and the data */
	left -= 24;
	if (left < 0)
		return 0;
	len += 24;

	frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
	memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
	memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
	memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
	frame->seq_ctrl = 0;

	/* fill in our indirect SSID IE */
	/* ...next IE... */

	left -= 2;
	if (left < 0)
		return 0;
	len += 2;
	pos = &(frame->u.probe_req.variable[0]);
	*pos++ = WLAN_EID_SSID;
	*pos++ = 0;

	/* fill in our direct SSID IE... */
	if (is_direct) {
		/* ...next IE... */
		left -= 2 + priv->essid_len;
		if (left < 0)
			return 0;
		/* ... fill it in... */
		*pos++ = WLAN_EID_SSID;
		*pos++ = priv->essid_len;
		memcpy(pos, priv->essid, priv->essid_len);
		pos += priv->essid_len;
		len += 2 + priv->essid_len;
	}

	/* fill in supported rate */
	/* ...next IE... */
	left -= 2;
	if (left < 0)
		return 0;

	/* ... fill it in... */
	*pos++ = WLAN_EID_SUPP_RATES;
	*pos = 0;

	priv->active_rate = priv->rates_mask;
	active_rates = priv->active_rate;
	priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;

	cck_rates = IWL_CCK_RATES_MASK & active_rates;
	ret_rates = iwl_supported_rate_to_ie(pos, cck_rates,
			priv->active_rate_basic, &left);
	active_rates &= ~ret_rates;

	ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
				 priv->active_rate_basic, &left);
	active_rates &= ~ret_rates;

	len += 2 + *pos;
	pos += (*pos) + 1;
	if (active_rates == 0)
		goto fill_end;

	/* fill in supported extended rate */
	/* ...next IE... */
	left -= 2;
	if (left < 0)
		return 0;
	/* ... fill it in... */
	*pos++ = WLAN_EID_EXT_SUPP_RATES;
	*pos = 0;
	iwl_supported_rate_to_ie(pos, active_rates,
				 priv->active_rate_basic, &left);
	if (*pos > 0)
		len += 2 + *pos;

 fill_end:
	return (u16)len;
}

/*
 * QoS  support
*/
#ifdef CONFIG_IWLWIFI_QOS
static int iwl_send_qos_params_command(struct iwl_priv *priv,
				       struct iwl_qosparam_cmd *qos)
{

	return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
				sizeof(struct iwl_qosparam_cmd), qos);
}

static void iwl_reset_qos(struct iwl_priv *priv)
{
	u16 cw_min = 15;
	u16 cw_max = 1023;
	u8 aifs = 2;
	u8 is_legacy = 0;
	unsigned long flags;
	int i;

	spin_lock_irqsave(&priv->lock, flags);
	priv->qos_data.qos_active = 0;

	if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
		if (priv->qos_data.qos_enable)
			priv->qos_data.qos_active = 1;
		if (!(priv->active_rate & 0xfff0)) {
			cw_min = 31;
			is_legacy = 1;
		}
	} else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
		if (priv->qos_data.qos_enable)
			priv->qos_data.qos_active = 1;
	} else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
		cw_min = 31;
		is_legacy = 1;
	}

	if (priv->qos_data.qos_active)
		aifs = 3;

	priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
	priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
	priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
	priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
	priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;

	if (priv->qos_data.qos_active) {
		i = 1;
		priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
		priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
		priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
		priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
		priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;

		i = 2;
		priv->qos_data.def_qos_parm.ac[i].cw_min =
			cpu_to_le16((cw_min + 1) / 2 - 1);
		priv->qos_data.def_qos_parm.ac[i].cw_max =
			cpu_to_le16(cw_max);
		priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
		if (is_legacy)
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(6016);
		else
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(3008);
		priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;

		i = 3;
		priv->qos_data.def_qos_parm.ac[i].cw_min =
			cpu_to_le16((cw_min + 1) / 4 - 1);
		priv->qos_data.def_qos_parm.ac[i].cw_max =
			cpu_to_le16((cw_max + 1) / 2 - 1);
		priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
		priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
		if (is_legacy)
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(3264);
		else
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(1504);
	} else {
		for (i = 1; i < 4; i++) {
			priv->qos_data.def_qos_parm.ac[i].cw_min =
				cpu_to_le16(cw_min);
			priv->qos_data.def_qos_parm.ac[i].cw_max =
				cpu_to_le16(cw_max);
			priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
			priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
			priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
		}
	}
	IWL_DEBUG_QOS("set QoS to default \n");

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

static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
{
	unsigned long flags;

	if (priv == NULL)
		return;

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	if (!priv->qos_data.qos_enable)
		return;

	spin_lock_irqsave(&priv->lock, flags);
	priv->qos_data.def_qos_parm.qos_flags = 0;

	if (priv->qos_data.qos_cap.q_AP.queue_request &&
	    !priv->qos_data.qos_cap.q_AP.txop_request)
		priv->qos_data.def_qos_parm.qos_flags |=
			QOS_PARAM_FLG_TXOP_TYPE_MSK;

	if (priv->qos_data.qos_active)
		priv->qos_data.def_qos_parm.qos_flags |=
			QOS_PARAM_FLG_UPDATE_EDCA_MSK;

	spin_unlock_irqrestore(&priv->lock, flags);

	if (force || iwl_is_associated(priv)) {
		IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
			      priv->qos_data.qos_active);

		iwl_send_qos_params_command(priv,
				&(priv->qos_data.def_qos_parm));
	}
}

#endif /* CONFIG_IWLWIFI_QOS */
/*
 * Power management (not Tx power!) functions
 */
#define MSEC_TO_USEC 1024

#define NOSLP __constant_cpu_to_le32(0)
#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
#define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
#define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
				     __constant_cpu_to_le32(X1), \
				     __constant_cpu_to_le32(X2), \
				     __constant_cpu_to_le32(X3), \
				     __constant_cpu_to_le32(X4)}


/* default power management (not Tx power) table values */
/* for tim  0-10 */
static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
	{{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	{{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
	{{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
	{{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
	{{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
	{{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
};

/* for tim > 10 */
static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
	{{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	{{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
		 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
	{{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
		 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
	{{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
		 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
	{{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
	{{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
		 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
};

int iwl_power_init_handle(struct iwl_priv *priv)
{
	int rc = 0, i;
	struct iwl_power_mgr *pow_data;
	int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
	u16 pci_pm;

	IWL_DEBUG_POWER("Initialize power \n");

	pow_data = &(priv->power_data);

	memset(pow_data, 0, sizeof(*pow_data));

	pow_data->active_index = IWL_POWER_RANGE_0;
	pow_data->dtim_val = 0xffff;

	memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
	memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);

	rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
	if (rc != 0)
		return 0;
	else {
		struct iwl_powertable_cmd *cmd;

		IWL_DEBUG_POWER("adjust power command flags\n");

		for (i = 0; i < IWL_POWER_AC; i++) {
			cmd = &pow_data->pwr_range_0[i].cmd;

			if (pci_pm & 0x1)
				cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
			else
				cmd->flags |= IWL_POWER_PCI_PM_MSK;
		}
	}
	return rc;
}

static int iwl_update_power_cmd(struct iwl_priv *priv,
				struct iwl_powertable_cmd *cmd, u32 mode)
{
	int rc = 0, i;
	u8 skip;
	u32 max_sleep = 0;
	struct iwl_power_vec_entry *range;
	u8 period = 0;
	struct iwl_power_mgr *pow_data;

	if (mode > IWL_POWER_INDEX_5) {
		IWL_DEBUG_POWER("Error invalid power mode \n");
		return -1;
	}
	pow_data = &(priv->power_data);

	if (pow_data->active_index == IWL_POWER_RANGE_0)
		range = &pow_data->pwr_range_0[0];
	else
		range = &pow_data->pwr_range_1[1];

	memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));

#ifdef IWL_MAC80211_DISABLE
	if (priv->assoc_network != NULL) {
		unsigned long flags;

		period = priv->assoc_network->tim.tim_period;
	}
#endif	/*IWL_MAC80211_DISABLE */
	skip = range[mode].no_dtim;

	if (period == 0) {
		period = 1;
		skip = 0;
	}

	if (skip == 0) {
		max_sleep = period;
		cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
	} else {
		__le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
		max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
		cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
	}

	for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
		if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
			cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
	}

	IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
	IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
	IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
	IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
			le32_to_cpu(cmd->sleep_interval[0]),
			le32_to_cpu(cmd->sleep_interval[1]),
			le32_to_cpu(cmd->sleep_interval[2]),
			le32_to_cpu(cmd->sleep_interval[3]),
			le32_to_cpu(cmd->sleep_interval[4]));

	return rc;
}

static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
{
	u32 final_mode = mode;
	int rc;
	struct iwl_powertable_cmd cmd;

	/* If on battery, set to 3,
	 * if plugged into AC power, set to CAM ("continuosly aware mode"),
	 * else user level */
	switch (mode) {
	case IWL_POWER_BATTERY:
		final_mode = IWL_POWER_INDEX_3;
		break;
	case IWL_POWER_AC:
		final_mode = IWL_POWER_MODE_CAM;
		break;
	default:
		final_mode = mode;
		break;
	}

	iwl_update_power_cmd(priv, &cmd, final_mode);

	rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);

	if (final_mode == IWL_POWER_MODE_CAM)
		clear_bit(STATUS_POWER_PMI, &priv->status);
	else
		set_bit(STATUS_POWER_PMI, &priv->status);

	return rc;
}

int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
{
	/* Filter incoming packets to determine if they are targeted toward
	 * this network, discarding packets coming from ourselves */
	switch (priv->iw_mode) {
	case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
		/* packets from our adapter are dropped (echo) */
		if (!compare_ether_addr(header->addr2, priv->mac_addr))
			return 0;
		/* {broad,multi}cast packets to our IBSS go through */
		if (is_multicast_ether_addr(header->addr1))
			return !compare_ether_addr(header->addr3, priv->bssid);
		/* packets to our adapter go through */
		return !compare_ether_addr(header->addr1, priv->mac_addr);
	case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
		/* packets from our adapter are dropped (echo) */
		if (!compare_ether_addr(header->addr3, priv->mac_addr))
			return 0;
		/* {broad,multi}cast packets to our BSS go through */
		if (is_multicast_ether_addr(header->addr1))
			return !compare_ether_addr(header->addr2, priv->bssid);
		/* packets to our adapter go through */
		return !compare_ether_addr(header->addr1, priv->mac_addr);
	}

	return 1;
}

#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x

const char *iwl_get_tx_fail_reason(u32 status)
{
	switch (status & TX_STATUS_MSK) {
	case TX_STATUS_SUCCESS:
		return "SUCCESS";
		TX_STATUS_ENTRY(SHORT_LIMIT);
		TX_STATUS_ENTRY(LONG_LIMIT);
		TX_STATUS_ENTRY(FIFO_UNDERRUN);
		TX_STATUS_ENTRY(MGMNT_ABORT);
		TX_STATUS_ENTRY(NEXT_FRAG);
		TX_STATUS_ENTRY(LIFE_EXPIRE);
		TX_STATUS_ENTRY(DEST_PS);
		TX_STATUS_ENTRY(ABORTED);
		TX_STATUS_ENTRY(BT_RETRY);
		TX_STATUS_ENTRY(STA_INVALID);
		TX_STATUS_ENTRY(FRAG_DROPPED);
		TX_STATUS_ENTRY(TID_DISABLE);
		TX_STATUS_ENTRY(FRAME_FLUSHED);
		TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
		TX_STATUS_ENTRY(TX_LOCKED);
		TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
	}

	return "UNKNOWN";
}

/**
 * iwl_scan_cancel - Cancel any currently executing HW scan
 *
 * NOTE: priv->mutex is not required before calling this function
 */
static int iwl_scan_cancel(struct iwl_priv *priv)
{
	if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
		clear_bit(STATUS_SCANNING, &priv->status);
		return 0;
	}

	if (test_bit(STATUS_SCANNING, &priv->status)) {
		if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
			IWL_DEBUG_SCAN("Queuing scan abort.\n");
			set_bit(STATUS_SCAN_ABORTING, &priv->status);
			queue_work(priv->workqueue, &priv->abort_scan);

		} else
			IWL_DEBUG_SCAN("Scan abort already in progress.\n");

		return test_bit(STATUS_SCANNING, &priv->status);
	}

	return 0;
}

/**
 * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
 * @ms: amount of time to wait (in milliseconds) for scan to abort
 *
 * NOTE: priv->mutex must be held before calling this function
 */
static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
{
	unsigned long now = jiffies;
	int ret;

	ret = iwl_scan_cancel(priv);
	if (ret && ms) {
		mutex_unlock(&priv->mutex);
		while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
				test_bit(STATUS_SCANNING, &priv->status))
			msleep(1);
		mutex_lock(&priv->mutex);

		return test_bit(STATUS_SCANNING, &priv->status);
	}

	return ret;
}

static void iwl_sequence_reset(struct iwl_priv *priv)
{
	/* Reset ieee stats */

	/* We don't reset the net_device_stats (ieee->stats) on
	 * re-association */

	priv->last_seq_num = -1;
	priv->last_frag_num = -1;
	priv->last_packet_time = 0;

	iwl_scan_cancel(priv);
}

#define MAX_UCODE_BEACON_INTERVAL	1024
#define INTEL_CONN_LISTEN_INTERVAL	__constant_cpu_to_le16(0xA)

static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
{
	u16 new_val = 0;
	u16 beacon_factor = 0;

	beacon_factor =
	    (beacon_val + MAX_UCODE_BEACON_INTERVAL)
		/ MAX_UCODE_BEACON_INTERVAL;
	new_val = beacon_val / beacon_factor;

	return cpu_to_le16(new_val);
}

static void iwl_setup_rxon_timing(struct iwl_priv *priv)
{
	u64 interval_tm_unit;
	u64 tsf, result;
	unsigned long flags;
	struct ieee80211_conf *conf = NULL;
	u16 beacon_int = 0;

	conf = ieee80211_get_hw_conf(priv->hw);

	spin_lock_irqsave(&priv->lock, flags);
	priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
	priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);

	priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;

	tsf = priv->timestamp1;
	tsf = ((tsf << 32) | priv->timestamp0);

	beacon_int = priv->beacon_int;
	spin_unlock_irqrestore(&priv->lock, flags);

	if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
		if (beacon_int == 0) {
			priv->rxon_timing.beacon_interval = cpu_to_le16(100);
			priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
		} else {
			priv->rxon_timing.beacon_interval =
				cpu_to_le16(beacon_int);
			priv->rxon_timing.beacon_interval =
			    iwl_adjust_beacon_interval(
				le16_to_cpu(priv->rxon_timing.beacon_interval));
		}

		priv->rxon_timing.atim_window = 0;
	} else {
		priv->rxon_timing.beacon_interval =
			iwl_adjust_beacon_interval(conf->beacon_int);
		/* TODO: we need to get atim_window from upper stack
		 * for now we set to 0 */
		priv->rxon_timing.atim_window = 0;
	}

	interval_tm_unit =
		(le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
	result = do_div(tsf, interval_tm_unit);
	priv->rxon_timing.beacon_init_val =
	    cpu_to_le32((u32) ((u64) interval_tm_unit - result));

	IWL_DEBUG_ASSOC
	    ("beacon interval %d beacon timer %d beacon tim %d\n",
		le16_to_cpu(priv->rxon_timing.beacon_interval),
		le32_to_cpu(priv->rxon_timing.beacon_init_val),
		le16_to_cpu(priv->rxon_timing.atim_window));
}

static int iwl_scan_initiate(struct iwl_priv *priv)
{
	if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
		IWL_ERROR("APs don't scan.\n");
		return 0;
	}

	if (!iwl_is_ready_rf(priv)) {
		IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
		return -EIO;
	}

	if (test_bit(STATUS_SCANNING, &priv->status)) {
		IWL_DEBUG_SCAN("Scan already in progress.\n");
		return -EAGAIN;
	}

	if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
		IWL_DEBUG_SCAN("Scan request while abort pending.  "
			       "Queuing.\n");
		return -EAGAIN;
	}

	IWL_DEBUG_INFO("Starting scan...\n");
	priv->scan_bands = 2;
	set_bit(STATUS_SCANNING, &priv->status);
	priv->scan_start = jiffies;
	priv->scan_pass_start = priv->scan_start;

	queue_work(priv->workqueue, &priv->request_scan);

	return 0;
}

static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
{
	struct iwl_rxon_cmd *rxon = &priv->staging_rxon;

	if (hw_decrypt)
		rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
	else
		rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;

	return 0;
}

static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
{
	if (phymode == MODE_IEEE80211A) {
		priv->staging_rxon.flags &=
		    ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
		      | RXON_FLG_CCK_MSK);
		priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
	} else {
		/* Copied from iwl_bg_post_associate() */
		if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
			priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
		else
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

		if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

		priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
		priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
		priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
	}
}

/*
 * initilize rxon structure with default values fromm eeprom
 */
static void iwl_connection_init_rx_config(struct iwl_priv *priv)
{
	const struct iwl_channel_info *ch_info;

	memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));

	switch (priv->iw_mode) {
	case IEEE80211_IF_TYPE_AP:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
		break;

	case IEEE80211_IF_TYPE_STA:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
		priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
		break;

	case IEEE80211_IF_TYPE_IBSS:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
		priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
		priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
						  RXON_FILTER_ACCEPT_GRP_MSK;
		break;

	case IEEE80211_IF_TYPE_MNTR:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
		priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
		    RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
		break;
	}

#if 0
	/* TODO:  Figure out when short_preamble would be set and cache from
	 * that */
	if (!hw_to_local(priv->hw)->short_preamble)
		priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
	else
		priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
#endif

	ch_info = iwl_get_channel_info(priv, priv->phymode,
				       le16_to_cpu(priv->staging_rxon.channel));

	if (!ch_info)
		ch_info = &priv->channel_info[0];

	/*
	 * in some case A channels are all non IBSS
	 * in this case force B/G channel
	 */
	if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
	    !(is_channel_ibss(ch_info)))
		ch_info = &priv->channel_info[0];

	priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
	if (is_channel_a_band(ch_info))
		priv->phymode = MODE_IEEE80211A;
	else
		priv->phymode = MODE_IEEE80211G;

	iwl_set_flags_for_phymode(priv, priv->phymode);

	priv->staging_rxon.ofdm_basic_rates =
	    (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
	priv->staging_rxon.cck_basic_rates =
	    (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
}

static int iwl_set_mode(struct iwl_priv *priv, int mode)
{
	if (!iwl_is_ready_rf(priv))
		return -EAGAIN;

	if (mode == IEEE80211_IF_TYPE_IBSS) {
		const struct iwl_channel_info *ch_info;

		ch_info = iwl_get_channel_info(priv,
			priv->phymode,
			le16_to_cpu(priv->staging_rxon.channel));

		if (!ch_info || !is_channel_ibss(ch_info)) {
			IWL_ERROR("channel %d not IBSS channel\n",
				  le16_to_cpu(priv->staging_rxon.channel));
			return -EINVAL;
		}
	}

	cancel_delayed_work(&priv->scan_check);
	if (iwl_scan_cancel_timeout(priv, 100)) {
		IWL_WARNING("Aborted scan still in progress after 100ms\n");
		IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
		return -EAGAIN;
	}

	priv->iw_mode = mode;

	iwl_connection_init_rx_config(priv);
	memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);

	iwl_clear_stations_table(priv);

	iwl_commit_rxon(priv);

	return 0;
}

static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
				      struct ieee80211_tx_control *ctl,
				      struct iwl_cmd *cmd,
				      struct sk_buff *skb_frag,
				      int last_frag)
{
	struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;

	switch (keyinfo->alg) {
	case ALG_CCMP:
		cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
		memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
		IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
		break;

	case ALG_TKIP:
#if 0
		cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;

		if (last_frag)
			memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
			       8);
		else
			memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
#endif
		break;

	case ALG_WEP:
		cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
		    (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;

		if (keyinfo->keylen == 13)
			cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;

		memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);

		IWL_DEBUG_TX("Configuring packet for WEP encryption "
			     "with key %d\n", ctl->key_idx);
		break;

	default:
		printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
		break;
	}
}

/*
 * handle build REPLY_TX command notification.
 */
static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
				  struct iwl_cmd *cmd,
				  struct ieee80211_tx_control *ctrl,
				  struct ieee80211_hdr *hdr,
				  int is_unicast, u8 std_id)
{
	__le16 *qc;
	u16 fc = le16_to_cpu(hdr->frame_control);
	__le32 tx_flags = cmd->cmd.tx.tx_flags;

	cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
	if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
		tx_flags |= TX_CMD_FLG_ACK_MSK;
		if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
			tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
		if (ieee80211_is_probe_response(fc) &&
		    !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
			tx_flags |= TX_CMD_FLG_TSF_MSK;
	} else {
		tx_flags &= (~TX_CMD_FLG_ACK_MSK);
		tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
	}

	cmd->cmd.tx.sta_id = std_id;
	if (ieee80211_get_morefrag(hdr))
		tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;

	qc = ieee80211_get_qos_ctrl(hdr);
	if (qc) {
		cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
		tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
	} else
		tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;

	if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
		tx_flags |= TX_CMD_FLG_RTS_MSK;
		tx_flags &= ~TX_CMD_FLG_CTS_MSK;
	} else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
		tx_flags &= ~TX_CMD_FLG_RTS_MSK;
		tx_flags |= TX_CMD_FLG_CTS_MSK;
	}

	if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
		tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;

	tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
	if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
		if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
		    (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
			cmd->cmd.tx.timeout.pm_frame_timeout =
				cpu_to_le16(3);
		else
			cmd->cmd.tx.timeout.pm_frame_timeout =
				cpu_to_le16(2);
	} else
		cmd->cmd.tx.timeout.pm_frame_timeout = 0;

	cmd->cmd.tx.driver_txop = 0;
	cmd->cmd.tx.tx_flags = tx_flags;
	cmd->cmd.tx.next_frame_len = 0;
}

static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
{
	int sta_id;
	u16 fc = le16_to_cpu(hdr->frame_control);

	/* If this frame is broadcast or not data then use the broadcast
	 * station id */
	if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
	    is_multicast_ether_addr(hdr->addr1))
		return priv->hw_setting.bcast_sta_id;

	switch (priv->iw_mode) {

	/* If this frame is part of a BSS network (we're a station), then
	 * we use the AP's station id */
	case IEEE80211_IF_TYPE_STA:
		return IWL_AP_ID;

	/* If we are an AP, then find the station, or use BCAST */
	case IEEE80211_IF_TYPE_AP:
		sta_id = iwl_hw_find_station(priv, hdr->addr1);
		if (sta_id != IWL_INVALID_STATION)
			return sta_id;
		return priv->hw_setting.bcast_sta_id;

	/* If this frame is part of a IBSS network, then we use the
	 * target specific station id */
	case IEEE80211_IF_TYPE_IBSS: {
		DECLARE_MAC_BUF(mac);

		sta_id = iwl_hw_find_station(priv, hdr->addr1);
		if (sta_id != IWL_INVALID_STATION)
			return sta_id;

		sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);

		if (sta_id != IWL_INVALID_STATION)
			return sta_id;

		IWL_DEBUG_DROP("Station %s not in station map. "
			       "Defaulting to broadcast...\n",
			       print_mac(mac, hdr->addr1));
		iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
		return priv->hw_setting.bcast_sta_id;
	}
	default:
		IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
		return priv->hw_setting.bcast_sta_id;
	}
}

/*
 * start REPLY_TX command process
 */
static int iwl_tx_skb(struct iwl_priv *priv,
		      struct sk_buff *skb, struct ieee80211_tx_control *ctl)
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
	struct iwl_tfd_frame *tfd;
	u32 *control_flags;
	int txq_id = ctl->queue;
	struct iwl_tx_queue *txq = NULL;
	struct iwl_queue *q = NULL;
	dma_addr_t phys_addr;
	dma_addr_t txcmd_phys;
	struct iwl_cmd *out_cmd = NULL;
	u16 len, idx, len_org;
	u8 id, hdr_len, unicast;
	u8 sta_id;
	u16 seq_number = 0;
	u16 fc;
	__le16 *qc;
	u8 wait_write_ptr = 0;
	unsigned long flags;
	int rc;

	spin_lock_irqsave(&priv->lock, flags);
	if (iwl_is_rfkill(priv)) {
		IWL_DEBUG_DROP("Dropping - RF KILL\n");
		goto drop_unlock;
	}

	if (!priv->interface_id) {
		IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
		goto drop_unlock;
	}

	if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
		IWL_ERROR("ERROR: No TX rate available.\n");
		goto drop_unlock;
	}

	unicast = !is_multicast_ether_addr(hdr->addr1);
	id = 0;

	fc = le16_to_cpu(hdr->frame_control);

#ifdef CONFIG_IWLWIFI_DEBUG
	if (ieee80211_is_auth(fc))
		IWL_DEBUG_TX("Sending AUTH frame\n");
	else if (ieee80211_is_assoc_request(fc))
		IWL_DEBUG_TX("Sending ASSOC frame\n");
	else if (ieee80211_is_reassoc_request(fc))
		IWL_DEBUG_TX("Sending REASSOC frame\n");
#endif

	if (!iwl_is_associated(priv) &&
	    ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
		IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
		goto drop_unlock;
	}

	spin_unlock_irqrestore(&priv->lock, flags);

	hdr_len = ieee80211_get_hdrlen(fc);
	sta_id = iwl_get_sta_id(priv, hdr);
	if (sta_id == IWL_INVALID_STATION) {
		DECLARE_MAC_BUF(mac);

		IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
			       print_mac(mac, hdr->addr1));
		goto drop;
	}

	IWL_DEBUG_RATE("station Id %d\n", sta_id);

	qc = ieee80211_get_qos_ctrl(hdr);
	if (qc) {
		u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
		seq_number = priv->stations[sta_id].tid[tid].seq_number &
				IEEE80211_SCTL_SEQ;
		hdr->seq_ctrl = cpu_to_le16(seq_number) |
			(hdr->seq_ctrl &
				__constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
		seq_number += 0x10;
	}
	txq = &priv->txq[txq_id];
	q = &txq->q;

	spin_lock_irqsave(&priv->lock, flags);

	tfd = &txq->bd[q->first_empty];
	memset(tfd, 0, sizeof(*tfd));
	control_flags = (u32 *) tfd;
	idx = get_cmd_index(q, q->first_empty, 0);

	memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
	txq->txb[q->first_empty].skb[0] = skb;
	memcpy(&(txq->txb[q->first_empty].status.control),
	       ctl, sizeof(struct ieee80211_tx_control));
	out_cmd = &txq->cmd[idx];
	memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
	memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
	out_cmd->hdr.cmd = REPLY_TX;
	out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
				INDEX_TO_SEQ(q->first_empty)));
	/* copy frags header */
	memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);

	/* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
	len = priv->hw_setting.tx_cmd_len +
		sizeof(struct iwl_cmd_header) + hdr_len;

	len_org = len;
	len = (len + 3) & ~3;

	if (len_org != len)
		len_org = 1;
	else
		len_org = 0;

	txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
		     offsetof(struct iwl_cmd, hdr);

	iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);

	if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
		iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);

	/* 802.11 null functions have no payload... */
	len = skb->len - hdr_len;
	if (len) {
		phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
					   len, PCI_DMA_TODEVICE);
		iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
	}

	/* If there is no payload, then only one TFD is used */
	if (!len)
		*control_flags = TFD_CTL_COUNT_SET(1);
	else
		*control_flags = TFD_CTL_COUNT_SET(2) |
			TFD_CTL_PAD_SET(U32_PAD(len));

	len = (u16)skb->len;
	out_cmd->cmd.tx.len = cpu_to_le16(len);

	/* TODO need this for burst mode later on */
	iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);

	/* set is_hcca to 0; it probably will never be implemented */
	iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);

	out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
	out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;

	if (!ieee80211_get_morefrag(hdr)) {
		txq->need_update = 1;
		if (qc) {
			u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
			priv->stations[sta_id].tid[tid].seq_number = seq_number;
		}
	} else {
		wait_write_ptr = 1;
		txq->need_update = 0;
	}

	iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
			   sizeof(out_cmd->cmd.tx));

	iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
			   ieee80211_get_hdrlen(fc));

	q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
	rc = iwl_tx_queue_update_write_ptr(priv, txq);
	spin_unlock_irqrestore(&priv->lock, flags);

	if (rc)
		return rc;

	if ((iwl_queue_space(q) < q->high_mark)
	    && priv->mac80211_registered) {
		if (wait_write_ptr) {
			spin_lock_irqsave(&priv->lock, flags);
			txq->need_update = 1;
			iwl_tx_queue_update_write_ptr(priv, txq);
			spin_unlock_irqrestore(&priv->lock, flags);
		}

		ieee80211_stop_queue(priv->hw, ctl->queue);
	}

	return 0;

drop_unlock:
	spin_unlock_irqrestore(&priv->lock, flags);
drop:
	return -1;
}

static void iwl_set_rate(struct iwl_priv *priv)
{
	const struct ieee80211_hw_mode *hw = NULL;
	struct ieee80211_rate *rate;
	int i;

	hw = iwl_get_hw_mode(priv, priv->phymode);

	priv->active_rate = 0;
	priv->active_rate_basic = 0;

	IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
		       hw->mode == MODE_IEEE80211A ?
		       'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));

	for (i = 0; i < hw->num_rates; i++) {
		rate = &(hw->rates[i]);
		if ((rate->val < IWL_RATE_COUNT) &&
		    (rate->flags & IEEE80211_RATE_SUPPORTED)) {
			IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
				       rate->val, iwl_rates[rate->val].plcp,
				       (rate->flags & IEEE80211_RATE_BASIC) ?
				       "*" : "");
			priv->active_rate |= (1 << rate->val);
			if (rate->flags & IEEE80211_RATE_BASIC)
				priv->active_rate_basic |= (1 << rate->val);
		} else
			IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
				       rate->val, iwl_rates[rate->val].plcp);
	}

	IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
		       priv->active_rate, priv->active_rate_basic);

	/*
	 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
	 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
	 * OFDM
	 */
	if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
		priv->staging_rxon.cck_basic_rates =
		    ((priv->active_rate_basic &
		      IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
	else
		priv->staging_rxon.cck_basic_rates =
		    (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;

	if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
		priv->staging_rxon.ofdm_basic_rates =
		    ((priv->active_rate_basic &
		      (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
		      IWL_FIRST_OFDM_RATE) & 0xFF;
	else
		priv->staging_rxon.ofdm_basic_rates =
		   (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
}

static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
{
	unsigned long flags;

	if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
		return;

	IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
			  disable_radio ? "OFF" : "ON");

	if (disable_radio) {
		iwl_scan_cancel(priv);
		/* FIXME: This is a workaround for AP */
		if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
			spin_lock_irqsave(&priv->lock, flags);
			iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
				    CSR_UCODE_SW_BIT_RFKILL);
			spin_unlock_irqrestore(&priv->lock, flags);
			iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
			set_bit(STATUS_RF_KILL_SW, &priv->status);
		}
		return;
	}

	spin_lock_irqsave(&priv->lock, flags);
	iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);

	clear_bit(STATUS_RF_KILL_SW, &priv->status);
	spin_unlock_irqrestore(&priv->lock, flags);

	/* wake up ucode */
	msleep(10);

	spin_lock_irqsave(&priv->lock, flags);
	iwl_read32(priv, CSR_UCODE_DRV_GP1);
	if (!iwl_grab_restricted_access(priv))
		iwl_release_restricted_access(priv);
	spin_unlock_irqrestore(&priv->lock, flags);

	if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
		IWL_DEBUG_RF_KILL("Can not turn radio back on - "
				  "disabled by HW switch\n");
		return;
	}

	queue_work(priv->workqueue, &priv->restart);
	return;
}

void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
			    u32 decrypt_res, struct ieee80211_rx_status *stats)
{
	u16 fc =
	    le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);

	if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
		return;

	if (!(fc & IEEE80211_FCTL_PROTECTED))
		return;

	IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
	switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
	case RX_RES_STATUS_SEC_TYPE_TKIP:
		if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
		    RX_RES_STATUS_BAD_ICV_MIC)
			stats->flag |= RX_FLAG_MMIC_ERROR;
	case RX_RES_STATUS_SEC_TYPE_WEP:
	case RX_RES_STATUS_SEC_TYPE_CCMP:
		if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
		    RX_RES_STATUS_DECRYPT_OK) {
			IWL_DEBUG_RX("hw decrypt successfully!!!\n");
			stats->flag |= RX_FLAG_DECRYPTED;
		}
		break;

	default:
		break;
	}
}

void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
				    struct iwl_rx_mem_buffer *rxb,
				    void *data, short len,
				    struct ieee80211_rx_status *stats,
				    u16 phy_flags)
{
	struct iwl_rt_rx_hdr *iwl_rt;

	/* First cache any information we need before we overwrite
	 * the information provided in the skb from the hardware */
	s8 signal = stats->ssi;
	s8 noise = 0;
	int rate = stats->rate;
	u64 tsf = stats->mactime;
	__le16 phy_flags_hw = cpu_to_le16(phy_flags);

	/* We received data from the HW, so stop the watchdog */
	if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
		IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
		return;
	}

	/* copy the frame data to write after where the radiotap header goes */
	iwl_rt = (void *)rxb->skb->data;
	memmove(iwl_rt->payload, data, len);

	iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
	iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */

	/* total header + data */
	iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));

	/* Set the size of the skb to the size of the frame */
	skb_put(rxb->skb, sizeof(*iwl_rt) + len);

	/* Big bitfield of all the fields we provide in radiotap */
	iwl_rt->rt_hdr.it_present =
	    cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
			(1 << IEEE80211_RADIOTAP_FLAGS) |
			(1 << IEEE80211_RADIOTAP_RATE) |
			(1 << IEEE80211_RADIOTAP_CHANNEL) |
			(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
			(1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
			(1 << IEEE80211_RADIOTAP_ANTENNA));

	/* Zero the flags, we'll add to them as we go */
	iwl_rt->rt_flags = 0;

	iwl_rt->rt_tsf = cpu_to_le64(tsf);

	/* Convert to dBm */
	iwl_rt->rt_dbmsignal = signal;
	iwl_rt->rt_dbmnoise = noise;

	/* Convert the channel frequency and set the flags */
	iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
	if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
		iwl_rt->rt_chbitmask =
		    cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
	else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
		iwl_rt->rt_chbitmask =
		    cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
	else	/* 802.11g */
		iwl_rt->rt_chbitmask =
		    cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));

	rate = iwl_rate_index_from_plcp(rate);
	if (rate == -1)
		iwl_rt->rt_rate = 0;
	else
		iwl_rt->rt_rate = iwl_rates[rate].ieee;

	/* antenna number */
	iwl_rt->rt_antenna =
		le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;

	/* set the preamble flag if we have it */
	if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
		iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;

	IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);

	stats->flag |= RX_FLAG_RADIOTAP;
	ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
	rxb->skb = NULL;
}


#define IWL_PACKET_RETRY_TIME HZ

int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
{
	u16 sc = le16_to_cpu(header->seq_ctrl);
	u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
	u16 frag = sc & IEEE80211_SCTL_FRAG;
	u16 *last_seq, *last_frag;
	unsigned long *last_time;

	switch (priv->iw_mode) {
	case IEEE80211_IF_TYPE_IBSS:{
		struct list_head *p;
		struct iwl_ibss_seq *entry = NULL;
		u8 *mac = header->addr2;
		int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);

		__list_for_each(p, &priv->ibss_mac_hash[index]) {
			entry =
				list_entry(p, struct iwl_ibss_seq, list);
			if (!compare_ether_addr(entry->mac, mac))
				break;
		}
		if (p == &priv->ibss_mac_hash[index]) {
			entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
			if (!entry) {
				IWL_ERROR
					("Cannot malloc new mac entry\n");
				return 0;
			}
			memcpy(entry->mac, mac, ETH_ALEN);
			entry->seq_num = seq;
			entry->frag_num = frag;
			entry->packet_time = jiffies;
			list_add(&entry->list,
				 &priv->ibss_mac_hash[index]);
			return 0;
		}
		last_seq = &entry->seq_num;
		last_frag = &entry->frag_num;
		last_time = &entry->packet_time;
		break;
	}
	case IEEE80211_IF_TYPE_STA:
		last_seq = &priv->last_seq_num;
		last_frag = &priv->last_frag_num;
		last_time = &priv->last_packet_time;
		break;
	default:
		return 0;
	}
	if ((*last_seq == seq) &&
	    time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
		if (*last_frag == frag)
			goto drop;
		if (*last_frag + 1 != frag)
			/* out-of-order fragment */
			goto drop;
	} else
		*last_seq = seq;

	*last_frag = frag;
	*last_time = jiffies;
	return 0;

 drop:
	return 1;
}

#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT

#include "iwl-spectrum.h"

#define BEACON_TIME_MASK_LOW	0x00FFFFFF
#define BEACON_TIME_MASK_HIGH	0xFF000000
#define TIME_UNIT		1024

/*
 * extended beacon time format
 * time in usec will be changed into a 32-bit value in 8:24 format
 * the high 1 byte is the beacon counts
 * the lower 3 bytes is the time in usec within one beacon interval
 */

static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
{
	u32 quot;
	u32 rem;
	u32 interval = beacon_interval * 1024;

	if (!interval || !usec)
		return 0;

	quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
	rem = (usec % interval) & BEACON_TIME_MASK_LOW;

	return (quot << 24) + rem;
}

/* base is usually what we get from ucode with each received frame,
 * the same as HW timer counter counting down
 */

static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
{
	u32 base_low = base & BEACON_TIME_MASK_LOW;
	u32 addon_low = addon & BEACON_TIME_MASK_LOW;
	u32 interval = beacon_interval * TIME_UNIT;
	u32 res = (base & BEACON_TIME_MASK_HIGH) +
	    (addon & BEACON_TIME_MASK_HIGH);

	if (base_low > addon_low)
		res += base_low - addon_low;
	else if (base_low < addon_low) {
		res += interval + base_low - addon_low;
		res += (1 << 24);
	} else
		res += (1 << 24);

	return cpu_to_le32(res);
}

static int iwl_get_measurement(struct iwl_priv *priv,
			       struct ieee80211_measurement_params *params,
			       u8 type)
{
	struct iwl_spectrum_cmd spectrum;
	struct iwl_rx_packet *res;
	struct iwl_host_cmd cmd = {
		.id = REPLY_SPECTRUM_MEASUREMENT_CMD,
		.data = (void *)&spectrum,
		.meta.flags = CMD_WANT_SKB,
	};
	u32 add_time = le64_to_cpu(params->start_time);
	int rc;
	int spectrum_resp_status;
	int duration = le16_to_cpu(params->duration);

	if (iwl_is_associated(priv))
		add_time =
		    iwl_usecs_to_beacons(
			le64_to_cpu(params->start_time) - priv->last_tsf,
			le16_to_cpu(priv->rxon_timing.beacon_interval));

	memset(&spectrum, 0, sizeof(spectrum));

	spectrum.channel_count = cpu_to_le16(1);
	spectrum.flags =
	    RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
	spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
	cmd.len = sizeof(spectrum);
	spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));

	if (iwl_is_associated(priv))
		spectrum.start_time =
		    iwl_add_beacon_time(priv->last_beacon_time,
				add_time,
				le16_to_cpu(priv->rxon_timing.beacon_interval));
	else
		spectrum.start_time = 0;

	spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
	spectrum.channels[0].channel = params->channel;
	spectrum.channels[0].type = type;
	if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
		spectrum.flags |= RXON_FLG_BAND_24G_MSK |
		    RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;

	rc = iwl_send_cmd_sync(priv, &cmd);
	if (rc)
		return rc;

	res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
		rc = -EIO;
	}

	spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
	switch (spectrum_resp_status) {
	case 0:		/* Command will be handled */
		if (res->u.spectrum.id != 0xff) {
			IWL_DEBUG_INFO
			    ("Replaced existing measurement: %d\n",
			     res->u.spectrum.id);
			priv->measurement_status &= ~MEASUREMENT_READY;
		}
		priv->measurement_status |= MEASUREMENT_ACTIVE;
		rc = 0;
		break;

	case 1:		/* Command will not be handled */
		rc = -EAGAIN;
		break;
	}

	dev_kfree_skb_any(cmd.meta.u.skb);

	return rc;
}
#endif

static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
				 struct iwl_tx_info *tx_sta)
{

	tx_sta->status.ack_signal = 0;
	tx_sta->status.excessive_retries = 0;
	tx_sta->status.queue_length = 0;
	tx_sta->status.queue_number = 0;

	if (in_interrupt())
		ieee80211_tx_status_irqsafe(priv->hw,
					    tx_sta->skb[0], &(tx_sta->status));
	else
		ieee80211_tx_status(priv->hw,
				    tx_sta->skb[0], &(tx_sta->status));

	tx_sta->skb[0] = NULL;
}

/**
 * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
 *
 * When FW advances 'R' index, all entries between old and
 * new 'R' index need to be reclaimed. As result, some free space
 * forms. If there is enough free space (> low mark), wake Tx queue.
 */
int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
{
	struct iwl_tx_queue *txq = &priv->txq[txq_id];
	struct iwl_queue *q = &txq->q;
	int nfreed = 0;

	if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
		IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
			  "is out of range [0-%d] %d %d.\n", txq_id,
			  index, q->n_bd, q->first_empty, q->last_used);
		return 0;
	}

	for (index = iwl_queue_inc_wrap(index, q->n_bd);
		q->last_used != index;
		q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
		if (txq_id != IWL_CMD_QUEUE_NUM) {
			iwl_txstatus_to_ieee(priv,
					&(txq->txb[txq->q.last_used]));
			iwl_hw_txq_free_tfd(priv, txq);
		} else if (nfreed > 1) {
			IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
					q->first_empty, q->last_used);
			queue_work(priv->workqueue, &priv->restart);
		}
		nfreed++;
	}

	if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
			(txq_id != IWL_CMD_QUEUE_NUM) &&
			priv->mac80211_registered)
		ieee80211_wake_queue(priv->hw, txq_id);


	return nfreed;
}

static int iwl_is_tx_success(u32 status)
{
	return (status & 0xFF) == 0x1;
}

/******************************************************************************
 *
 * Generic RX handler implementations
 *
 ******************************************************************************/
static void iwl_rx_reply_tx(struct iwl_priv *priv,
			    struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
	int txq_id = SEQ_TO_QUEUE(sequence);
	int index = SEQ_TO_INDEX(sequence);
	struct iwl_tx_queue *txq = &priv->txq[txq_id];
	struct ieee80211_tx_status *tx_status;
	struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
	u32  status = le32_to_cpu(tx_resp->status);

	if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
		IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
			  "is out of range [0-%d] %d %d\n", txq_id,
			  index, txq->q.n_bd, txq->q.first_empty,
			  txq->q.last_used);
		return;
	}

	tx_status = &(txq->txb[txq->q.last_used].status);

	tx_status->retry_count = tx_resp->failure_frame;
	tx_status->queue_number = status;
	tx_status->queue_length = tx_resp->bt_kill_count;
	tx_status->queue_length |= tx_resp->failure_rts;

	tx_status->flags =
	    iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;

	tx_status->control.tx_rate = iwl_rate_index_from_plcp(tx_resp->rate);

	IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
			txq_id, iwl_get_tx_fail_reason(status), status,
			tx_resp->rate, tx_resp->failure_frame);

	IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
	if (index != -1)
		iwl_tx_queue_reclaim(priv, txq_id, index);

	if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
		IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
}


static void iwl_rx_reply_alive(struct iwl_priv *priv,
			       struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl_alive_resp *palive;
	struct delayed_work *pwork;

	palive = &pkt->u.alive_frame;

	IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
		       "0x%01X 0x%01X\n",
		       palive->is_valid, palive->ver_type,
		       palive->ver_subtype);

	if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
		IWL_DEBUG_INFO("Initialization Alive received.\n");
		memcpy(&priv->card_alive_init,
		       &pkt->u.alive_frame,
		       sizeof(struct iwl_init_alive_resp));
		pwork = &priv->init_alive_start;
	} else {
		IWL_DEBUG_INFO("Runtime Alive received.\n");
		memcpy(&priv->card_alive, &pkt->u.alive_frame,
		       sizeof(struct iwl_alive_resp));
		pwork = &priv->alive_start;
		iwl_disable_events(priv);
	}

	/* We delay the ALIVE response by 5ms to
	 * give the HW RF Kill time to activate... */
	if (palive->is_valid == UCODE_VALID_OK)
		queue_delayed_work(priv->workqueue, pwork,
				   msecs_to_jiffies(5));
	else
		IWL_WARNING("uCode did not respond OK.\n");
}

static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
				 struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;

	IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
	return;
}

static void iwl_rx_reply_error(struct iwl_priv *priv,
			       struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;

	IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
		"seq 0x%04X ser 0x%08X\n",
		le32_to_cpu(pkt->u.err_resp.error_type),
		get_cmd_string(pkt->u.err_resp.cmd_id),
		pkt->u.err_resp.cmd_id,
		le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
		le32_to_cpu(pkt->u.err_resp.error_info));
}

#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x

static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
	struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
	IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
		      le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
	rxon->channel = csa->channel;
	priv->staging_rxon.channel = csa->channel;
}

static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
					  struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);

	if (!report->state) {
		IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
			  "Spectrum Measure Notification: Start\n");
		return;
	}

	memcpy(&priv->measure_report, report, sizeof(*report));
	priv->measurement_status |= MEASUREMENT_READY;
#endif
}

static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
				  struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
	IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
		     sleep->pm_sleep_mode, sleep->pm_wakeup_src);
#endif
}

static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
					     struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
	IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
			"notification for %s:\n",
			le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
	iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
}

static void iwl_bg_beacon_update(struct work_struct *work)
{
	struct iwl_priv *priv =
		container_of(work, struct iwl_priv, beacon_update);
	struct sk_buff *beacon;

	/* Pull updated AP beacon from mac80211. will fail if not in AP mode */
	beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);

	if (!beacon) {
		IWL_ERROR("update beacon failed\n");
		return;
	}

	mutex_lock(&priv->mutex);
	/* new beacon skb is allocated every time; dispose previous.*/
	if (priv->ibss_beacon)
		dev_kfree_skb(priv->ibss_beacon);

	priv->ibss_beacon = beacon;
	mutex_unlock(&priv->mutex);

	iwl_send_beacon_cmd(priv);
}

static void iwl_rx_beacon_notif(struct iwl_priv *priv,
				struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
	u8 rate = beacon->beacon_notify_hdr.rate;

	IWL_DEBUG_RX("beacon status %x retries %d iss %d "
		"tsf %d %d rate %d\n",
		le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
		beacon->beacon_notify_hdr.failure_frame,
		le32_to_cpu(beacon->ibss_mgr_status),
		le32_to_cpu(beacon->high_tsf),
		le32_to_cpu(beacon->low_tsf), rate);
#endif

	if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
	    (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
		queue_work(priv->workqueue, &priv->beacon_update);
}

/* Service response to REPLY_SCAN_CMD (0x80) */
static void iwl_rx_reply_scan(struct iwl_priv *priv,
			      struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl_scanreq_notification *notif =
	    (struct iwl_scanreq_notification *)pkt->u.raw;

	IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
#endif
}

/* Service SCAN_START_NOTIFICATION (0x82) */
static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
				    struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl_scanstart_notification *notif =
	    (struct iwl_scanstart_notification *)pkt->u.raw;
	priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
	IWL_DEBUG_SCAN("Scan start: "
		       "%d [802.11%s] "
		       "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
		       notif->channel,
		       notif->band ? "bg" : "a",
		       notif->tsf_high,
		       notif->tsf_low, notif->status, notif->beacon_timer);
}

/* Service SCAN_RESULTS_NOTIFICATION (0x83) */
static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
				      struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl_scanresults_notification *notif =
	    (struct iwl_scanresults_notification *)pkt->u.raw;

	IWL_DEBUG_SCAN("Scan ch.res: "
		       "%d [802.11%s] "
		       "(TSF: 0x%08X:%08X) - %d "
		       "elapsed=%lu usec (%dms since last)\n",
		       notif->channel,
		       notif->band ? "bg" : "a",
		       le32_to_cpu(notif->tsf_high),
		       le32_to_cpu(notif->tsf_low),
		       le32_to_cpu(notif->statistics[0]),
		       le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
		       jiffies_to_msecs(elapsed_jiffies
					(priv->last_scan_jiffies, jiffies)));

	priv->last_scan_jiffies = jiffies;
}

/* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
				       struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;

	IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
		       scan_notif->scanned_channels,
		       scan_notif->tsf_low,
		       scan_notif->tsf_high, scan_notif->status);

	/* The HW is no longer scanning */
	clear_bit(STATUS_SCAN_HW, &priv->status);

	/* The scan completion notification came in, so kill that timer... */
	cancel_delayed_work(&priv->scan_check);

	IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
		       (priv->scan_bands == 2) ? "2.4" : "5.2",
		       jiffies_to_msecs(elapsed_jiffies
					(priv->scan_pass_start, jiffies)));

	/* Remove this scanned band from the list
	 * of pending bands to scan */
	priv->scan_bands--;

	/* If a request to abort was given, or the scan did not succeed
	 * then we reset the scan state machine and terminate,
	 * re-queuing another scan if one has been requested */
	if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
		IWL_DEBUG_INFO("Aborted scan completed.\n");
		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
	} else {
		/* If there are more bands on this scan pass reschedule */
		if (priv->scan_bands > 0)
			goto reschedule;
	}

	priv->last_scan_jiffies = jiffies;
	IWL_DEBUG_INFO("Setting scan to off\n");

	clear_bit(STATUS_SCANNING, &priv->status);

	IWL_DEBUG_INFO("Scan took %dms\n",
		jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));

	queue_work(priv->workqueue, &priv->scan_completed);

	return;

reschedule:
	priv->scan_pass_start = jiffies;
	queue_work(priv->workqueue, &priv->request_scan);
}

/* Handle notification from uCode that card's power state is changing
 * due to software, hardware, or critical temperature RFKILL */
static void iwl_rx_card_state_notif(struct iwl_priv *priv,
				    struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
	u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
	unsigned long status = priv->status;

	IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
			  (flags & HW_CARD_DISABLED) ? "Kill" : "On",
			  (flags & SW_CARD_DISABLED) ? "Kill" : "On");

	iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
		    CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);

	if (flags & HW_CARD_DISABLED)
		set_bit(STATUS_RF_KILL_HW, &priv->status);
	else
		clear_bit(STATUS_RF_KILL_HW, &priv->status);


	if (flags & SW_CARD_DISABLED)
		set_bit(STATUS_RF_KILL_SW, &priv->status);
	else
		clear_bit(STATUS_RF_KILL_SW, &priv->status);

	iwl_scan_cancel(priv);

	if ((test_bit(STATUS_RF_KILL_HW, &status) !=
	     test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
	    (test_bit(STATUS_RF_KILL_SW, &status) !=
	     test_bit(STATUS_RF_KILL_SW, &priv->status)))
		queue_work(priv->workqueue, &priv->rf_kill);
	else
		wake_up_interruptible(&priv->wait_command_queue);
}

/**
 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 *
 * Setup the RX handlers for each of the reply types sent from the uCode
 * to the host.
 *
 * This function chains into the hardware specific files for them to setup
 * any hardware specific handlers as well.
 */
static void iwl_setup_rx_handlers(struct iwl_priv *priv)
{
	priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
	priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
	priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
	priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
	priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
	    iwl_rx_spectrum_measure_notif;
	priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
	priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
	    iwl_rx_pm_debug_statistics_notif;
	priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;

	/* NOTE:  iwl_rx_statistics is different based on whether
	 * the build is for the 3945 or the 4965.  See the
	 * corresponding implementation in iwl-XXXX.c
	 *
	 * The same handler is used for both the REPLY to a
	 * discrete statistics request from the host as well as
	 * for the periodic statistics notification from the uCode
	 */
	priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
	priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;

	priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
	priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
	priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
	    iwl_rx_scan_results_notif;
	priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
	    iwl_rx_scan_complete_notif;
	priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
	priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;

	/* Setup hardware specific Rx handlers */
	iwl_hw_rx_handler_setup(priv);
}

/**
 * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
 * @rxb: Rx buffer to reclaim
 *
 * If an Rx buffer has an async callback associated with it the callback
 * will be executed.  The attached skb (if present) will only be freed
 * if the callback returns 1
 */
static void iwl_tx_cmd_complete(struct iwl_priv *priv,
				struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
	int txq_id = SEQ_TO_QUEUE(sequence);
	int index = SEQ_TO_INDEX(sequence);
	int huge = sequence & SEQ_HUGE_FRAME;
	int cmd_index;
	struct iwl_cmd *cmd;

	/* If a Tx command is being handled and it isn't in the actual
	 * command queue then there a command routing bug has been introduced
	 * in the queue management code. */
	if (txq_id != IWL_CMD_QUEUE_NUM)
		IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
			  txq_id, pkt->hdr.cmd);
	BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);

	cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
	cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];

	/* Input error checking is done when commands are added to queue. */
	if (cmd->meta.flags & CMD_WANT_SKB) {
		cmd->meta.source->u.skb = rxb->skb;
		rxb->skb = NULL;
	} else if (cmd->meta.u.callback &&
		   !cmd->meta.u.callback(priv, cmd, rxb->skb))
		rxb->skb = NULL;

	iwl_tx_queue_reclaim(priv, txq_id, index);

	if (!(cmd->meta.flags & CMD_ASYNC)) {
		clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
		wake_up_interruptible(&priv->wait_command_queue);
	}
}

/************************** RX-FUNCTIONS ****************************/
/*
 * Rx theory of operation
 *
 * The host allocates 32 DMA target addresses and passes the host address
 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 * 0 to 31
 *
 * Rx Queue Indexes
 * The host/firmware share two index registers for managing the Rx buffers.
 *
 * The READ index maps to the first position that the firmware may be writing
 * to -- the driver can read up to (but not including) this position and get
 * good data.
 * The READ index is managed by the firmware once the card is enabled.
 *
 * The WRITE index maps to the last position the driver has read from -- the
 * position preceding WRITE is the last slot the firmware can place a packet.
 *
 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 * WRITE = READ.
 *
 * During initialization the host sets up the READ queue position to the first
 * INDEX position, and WRITE to the last (READ - 1 wrapped)
 *
 * When the firmware places a packet in a buffer it will advance the READ index
 * and fire the RX interrupt.  The driver can then query the READ index and
 * process as many packets as possible, moving the WRITE index forward as it
 * resets the Rx queue buffers with new memory.
 *
 * The management in the driver is as follows:
 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 *   to replensish the iwl->rxq->rx_free.
 * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
 *   iwl->rxq is replenished and the READ INDEX is updated (updating the
 *   'processed' and 'read' driver indexes as well)
 * + A received packet is processed and handed to the kernel network stack,
 *   detached from the iwl->rxq.  The driver 'processed' index is updated.
 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
 *   were enough free buffers and RX_STALLED is set it is cleared.
 *
 *
 * Driver sequence:
 *
 * iwl_rx_queue_alloc()       Allocates rx_free
 * iwl_rx_replenish()         Replenishes rx_free list from rx_used, and calls
 *                            iwl_rx_queue_restock
 * iwl_rx_queue_restock()     Moves available buffers from rx_free into Rx
 *                            queue, updates firmware pointers, and updates
 *                            the WRITE index.  If insufficient rx_free buffers
 *                            are available, schedules iwl_rx_replenish
 *
 * -- enable interrupts --
 * ISR - iwl_rx()             Detach iwl_rx_mem_buffers from pool up to the
 *                            READ INDEX, detaching the SKB from the pool.
 *                            Moves the packet buffer from queue to rx_used.
 *                            Calls iwl_rx_queue_restock to refill any empty
 *                            slots.
 * ...
 *
 */

/**
 * iwl_rx_queue_space - Return number of free slots available in queue.
 */
static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
{
	int s = q->read - q->write;
	if (s <= 0)
		s += RX_QUEUE_SIZE;
	/* keep some buffer to not confuse full and empty queue */
	s -= 2;
	if (s < 0)
		s = 0;
	return s;
}

/**
 * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
 *
 * NOTE: This function has 3945 and 4965 specific code sections
 * but is declared in base due to the majority of the
 * implementation being the same (only a numeric constant is
 * different)
 *
 */
int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
{
	u32 reg = 0;
	int rc = 0;
	unsigned long flags;

	spin_lock_irqsave(&q->lock, flags);

	if (q->need_update == 0)
		goto exit_unlock;

	if (test_bit(STATUS_POWER_PMI, &priv->status)) {
		reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);

		if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
			iwl_set_bit(priv, CSR_GP_CNTRL,
				    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
			goto exit_unlock;
		}

		rc = iwl_grab_restricted_access(priv);
		if (rc)
			goto exit_unlock;

		iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
				     q->write & ~0x7);
		iwl_release_restricted_access(priv);
	} else
		iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);


	q->need_update = 0;

 exit_unlock:
	spin_unlock_irqrestore(&q->lock, flags);
	return rc;
}

/**
 * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
 *
 * NOTE: This function has 3945 and 4965 specific code paths in it.
 */
static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
					  dma_addr_t dma_addr)
{
	return cpu_to_le32((u32)dma_addr);
}

/**
 * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
 *
 * If there are slots in the RX queue that  need to be restocked,
 * and we have free pre-allocated buffers, fill the ranks as much
 * as we can pulling from rx_free.
 *
 * This moves the 'write' index forward to catch up with 'processed', and
 * also updates the memory address in the firmware to reference the new
 * target buffer.
 */
int iwl_rx_queue_restock(struct iwl_priv *priv)
{
	struct iwl_rx_queue *rxq = &priv->rxq;
	struct list_head *element;
	struct iwl_rx_mem_buffer *rxb;
	unsigned long flags;
	int write, rc;

	spin_lock_irqsave(&rxq->lock, flags);
	write = rxq->write & ~0x7;
	while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
		element = rxq->rx_free.next;
		rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
		list_del(element);
		rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
		rxq->queue[rxq->write] = rxb;
		rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
		rxq->free_count--;
	}
	spin_unlock_irqrestore(&rxq->lock, flags);
	/* If the pre-allocated buffer pool is dropping low, schedule to
	 * refill it */
	if (rxq->free_count <= RX_LOW_WATERMARK)
		queue_work(priv->workqueue, &priv->rx_replenish);


	/* If we've added more space for the firmware to place data, tell it */
	if ((write != (rxq->write & ~0x7))
	    || (abs(rxq->write - rxq->read) > 7)) {
		spin_lock_irqsave(&rxq->lock, flags);
		rxq->need_update = 1;
		spin_unlock_irqrestore(&rxq->lock, flags);
		rc = iwl_rx_queue_update_write_ptr(priv, rxq);
		if (rc)
			return rc;
	}

	return 0;
}

/**
 * iwl_rx_replensih - Move all used packet from rx_used to rx_free
 *
 * When moving to rx_free an SKB is allocated for the slot.
 *
 * Also restock the Rx queue via iwl_rx_queue_restock.
 * This is called as a scheduled work item (except for during intialization)
 */
void iwl_rx_replenish(void *data)
{
	struct iwl_priv *priv = data;
	struct iwl_rx_queue *rxq = &priv->rxq;
	struct list_head *element;
	struct iwl_rx_mem_buffer *rxb;
	unsigned long flags;
	spin_lock_irqsave(&rxq->lock, flags);
	while (!list_empty(&rxq->rx_used)) {
		element = rxq->rx_used.next;
		rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
		rxb->skb =
		    alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
		if (!rxb->skb) {
			if (net_ratelimit())
				printk(KERN_CRIT DRV_NAME
				       ": Can not allocate SKB buffers\n");
			/* We don't reschedule replenish work here -- we will
			 * call the restock method and if it still needs
			 * more buffers it will schedule replenish */
			break;
		}
		priv->alloc_rxb_skb++;
		list_del(element);
		rxb->dma_addr =
		    pci_map_single(priv->pci_dev, rxb->skb->data,
				   IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
		list_add_tail(&rxb->list, &rxq->rx_free);
		rxq->free_count++;
	}
	spin_unlock_irqrestore(&rxq->lock, flags);

	spin_lock_irqsave(&priv->lock, flags);
	iwl_rx_queue_restock(priv);
	spin_unlock_irqrestore(&priv->lock, flags);
}

/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
 * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
 * This free routine walks the list of POOL entries and if SKB is set to
 * non NULL it is unmapped and freed
 */
void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
{
	int i;
	for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
		if (rxq->pool[i].skb != NULL) {
			pci_unmap_single(priv->pci_dev,
					 rxq->pool[i].dma_addr,
					 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
			dev_kfree_skb(rxq->pool[i].skb);
		}
	}

	pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
			    rxq->dma_addr);
	rxq->bd = NULL;
}

int iwl_rx_queue_alloc(struct iwl_priv *priv)
{
	struct iwl_rx_queue *rxq = &priv->rxq;
	struct pci_dev *dev = priv->pci_dev;
	int i;

	spin_lock_init(&rxq->lock);
	INIT_LIST_HEAD(&rxq->rx_free);
	INIT_LIST_HEAD(&rxq->rx_used);
	rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
	if (!rxq->bd)
		return -ENOMEM;
	/* Fill the rx_used queue with _all_ of the Rx buffers */
	for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
		list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
	/* Set us so that we have processed and used all buffers, but have
	 * not restocked the Rx queue with fresh buffers */
	rxq->read = rxq->write = 0;
	rxq->free_count = 0;
	rxq->need_update = 0;
	return 0;
}

void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
{
	unsigned long flags;
	int i;
	spin_lock_irqsave(&rxq->lock, flags);
	INIT_LIST_HEAD(&rxq->rx_free);
	INIT_LIST_HEAD(&rxq->rx_used);
	/* Fill the rx_used queue with _all_ of the Rx buffers */
	for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
		/* In the reset function, these buffers may have been allocated
		 * to an SKB, so we need to unmap and free potential storage */
		if (rxq->pool[i].skb != NULL) {
			pci_unmap_single(priv->pci_dev,
					 rxq->pool[i].dma_addr,
					 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
			priv->alloc_rxb_skb--;
			dev_kfree_skb(rxq->pool[i].skb);
			rxq->pool[i].skb = NULL;
		}
		list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
	}

	/* Set us so that we have processed and used all buffers, but have
	 * not restocked the Rx queue with fresh buffers */
	rxq->read = rxq->write = 0;
	rxq->free_count = 0;
	spin_unlock_irqrestore(&rxq->lock, flags);
}

/* Convert linear signal-to-noise ratio into dB */
static u8 ratio2dB[100] = {
/*	 0   1   2   3   4   5   6   7   8   9 */
	 0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
	20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
	26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
	29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
	32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
	34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
	36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
	37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
	38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
	39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
};

/* Calculates a relative dB value from a ratio of linear
 *   (i.e. not dB) signal levels.
 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
int iwl_calc_db_from_ratio(int sig_ratio)
{
	/* Anything above 1000:1 just report as 60 dB */
	if (sig_ratio > 1000)
		return 60;

	/* Above 100:1, divide by 10 and use table,
	 *   add 20 dB to make up for divide by 10 */
	if (sig_ratio > 100)
		return (20 + (int)ratio2dB[sig_ratio/10]);

	/* We shouldn't see this */
	if (sig_ratio < 1)
		return 0;

	/* Use table for ratios 1:1 - 99:1 */
	return (int)ratio2dB[sig_ratio];
}

#define PERFECT_RSSI (-20) /* dBm */
#define WORST_RSSI (-95)   /* dBm */
#define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)

/* Calculate an indication of rx signal quality (a percentage, not dBm!).
 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
 *   about formulas used below. */
int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
{
	int sig_qual;
	int degradation = PERFECT_RSSI - rssi_dbm;

	/* If we get a noise measurement, use signal-to-noise ratio (SNR)
	 * as indicator; formula is (signal dbm - noise dbm).
	 * SNR at or above 40 is a great signal (100%).
	 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
	 * Weakest usable signal is usually 10 - 15 dB SNR. */
	if (noise_dbm) {
		if (rssi_dbm - noise_dbm >= 40)
			return 100;
		else if (rssi_dbm < noise_dbm)
			return 0;
		sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;

	/* Else use just the signal level.
	 * This formula is a least squares fit of data points collected and
	 *   compared with a reference system that had a percentage (%) display
	 *   for signal quality. */
	} else
		sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
			    (15 * RSSI_RANGE + 62 * degradation)) /
			   (RSSI_RANGE * RSSI_RANGE);

	if (sig_qual > 100)
		sig_qual = 100;
	else if (sig_qual < 1)
		sig_qual = 0;

	return sig_qual;
}

/**
 * iwl_rx_handle - Main entry function for receiving responses from the uCode
 *
 * Uses the priv->rx_handlers callback function array to invoke
 * the appropriate handlers, including command responses,
 * frame-received notifications, and other notifications.
 */
static void iwl_rx_handle(struct iwl_priv *priv)
{
	struct iwl_rx_mem_buffer *rxb;
	struct iwl_rx_packet *pkt;
	struct iwl_rx_queue *rxq = &priv->rxq;
	u32 r, i;
	int reclaim;
	unsigned long flags;

	r = iwl_hw_get_rx_read(priv);
	i = rxq->read;

	/* Rx interrupt, but nothing sent from uCode */
	if (i == r)
		IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);

	while (i != r) {
		rxb = rxq->queue[i];

		/* If an RXB doesn't have a queue slot associated with it
		 * then a bug has been introduced in the queue refilling
		 * routines -- catch it here */
		BUG_ON(rxb == NULL);

		rxq->queue[i] = NULL;

		pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
					    IWL_RX_BUF_SIZE,
					    PCI_DMA_FROMDEVICE);
		pkt = (struct iwl_rx_packet *)rxb->skb->data;

		/* Reclaim a command buffer only if this packet is a response
		 *   to a (driver-originated) command.
		 * If the packet (e.g. Rx frame) originated from uCode,
		 *   there is no command buffer to reclaim.
		 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
		 *   but apparently a few don't get set; catch them here. */
		reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
			(pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
			(pkt->hdr.cmd != REPLY_TX);

		/* Based on type of command response or notification,
		 *   handle those that need handling via function in
		 *   rx_handlers table.  See iwl_setup_rx_handlers() */
		if (priv->rx_handlers[pkt->hdr.cmd]) {
			IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
				"r = %d, i = %d, %s, 0x%02x\n", r, i,
				get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
			priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
		} else {
			/* No handling needed */
			IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
				"r %d i %d No handler needed for %s, 0x%02x\n",
				r, i, get_cmd_string(pkt->hdr.cmd),
				pkt->hdr.cmd);
		}

		if (reclaim) {
			/* Invoke any callbacks, transfer the skb to caller,
			 * and fire off the (possibly) blocking iwl_send_cmd()
			 * as we reclaim the driver command queue */
			if (rxb && rxb->skb)
				iwl_tx_cmd_complete(priv, rxb);
			else
				IWL_WARNING("Claim null rxb?\n");
		}

		/* For now we just don't re-use anything.  We can tweak this
		 * later to try and re-use notification packets and SKBs that
		 * fail to Rx correctly */
		if (rxb->skb != NULL) {
			priv->alloc_rxb_skb--;
			dev_kfree_skb_any(rxb->skb);
			rxb->skb = NULL;
		}

		pci_unmap_single(priv->pci_dev, rxb->dma_addr,
				 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
		spin_lock_irqsave(&rxq->lock, flags);
		list_add_tail(&rxb->list, &priv->rxq.rx_used);
		spin_unlock_irqrestore(&rxq->lock, flags);
		i = (i + 1) & RX_QUEUE_MASK;
	}

	/* Backtrack one entry */
	priv->rxq.read = i;
	iwl_rx_queue_restock(priv);
}

int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
				  struct iwl_tx_queue *txq)
{
	u32 reg = 0;
	int rc = 0;
	int txq_id = txq->q.id;

	if (txq->need_update == 0)
		return rc;

	/* if we're trying to save power */
	if (test_bit(STATUS_POWER_PMI, &priv->status)) {
		/* wake up nic if it's powered down ...
		 * uCode will wake up, and interrupt us again, so next
		 * time we'll skip this part. */
		reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);

		if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
			IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
			iwl_set_bit(priv, CSR_GP_CNTRL,
				    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
			return rc;
		}

		/* restore this queue's parameters in nic hardware. */
		rc = iwl_grab_restricted_access(priv);
		if (rc)
			return rc;
		iwl_write_restricted(priv, HBUS_TARG_WRPTR,
				     txq->q.first_empty | (txq_id << 8));
		iwl_release_restricted_access(priv);

	/* else not in power-save mode, uCode will never sleep when we're
	 * trying to tx (during RFKILL, we're not trying to tx). */
	} else
		iwl_write32(priv, HBUS_TARG_WRPTR,
			    txq->q.first_empty | (txq_id << 8));

	txq->need_update = 0;

	return rc;
}

#ifdef CONFIG_IWLWIFI_DEBUG
static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
{
	DECLARE_MAC_BUF(mac);

	IWL_DEBUG_RADIO("RX CONFIG:\n");
	iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
	IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
	IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
	IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
			le32_to_cpu(rxon->filter_flags));
	IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
	IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
			rxon->ofdm_basic_rates);
	IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
	IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
			print_mac(mac, rxon->node_addr));
	IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
			print_mac(mac, rxon->bssid_addr));
	IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
}
#endif

static void iwl_enable_interrupts(struct iwl_priv *priv)
{
	IWL_DEBUG_ISR("Enabling interrupts\n");
	set_bit(STATUS_INT_ENABLED, &priv->status);
	iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
}

static inline void iwl_disable_interrupts(struct iwl_priv *priv)
{
	clear_bit(STATUS_INT_ENABLED, &priv->status);

	/* disable interrupts from uCode/NIC to host */
	iwl_write32(priv, CSR_INT_MASK, 0x00000000);

	/* acknowledge/clear/reset any interrupts still pending
	 * from uCode or flow handler (Rx/Tx DMA) */
	iwl_write32(priv, CSR_INT, 0xffffffff);
	iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
	IWL_DEBUG_ISR("Disabled interrupts\n");
}

static const char *desc_lookup(int i)
{
	switch (i) {
	case 1:
		return "FAIL";
	case 2:
		return "BAD_PARAM";
	case 3:
		return "BAD_CHECKSUM";
	case 4:
		return "NMI_INTERRUPT";
	case 5:
		return "SYSASSERT";
	case 6:
		return "FATAL_ERROR";
	}

	return "UNKNOWN";
}

#define ERROR_START_OFFSET  (1 * sizeof(u32))
#define ERROR_ELEM_SIZE     (7 * sizeof(u32))

static void iwl_dump_nic_error_log(struct iwl_priv *priv)
{
	u32 i;
	u32 desc, time, count, base, data1;
	u32 blink1, blink2, ilink1, ilink2;
	int rc;

	base = le32_to_cpu(priv->card_alive.error_event_table_ptr);

	if (!iwl_hw_valid_rtc_data_addr(base)) {
		IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
		return;
	}

	rc = iwl_grab_restricted_access(priv);
	if (rc) {
		IWL_WARNING("Can not read from adapter at this time.\n");
		return;
	}

	count = iwl_read_restricted_mem(priv, base);

	if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
		IWL_ERROR("Start IWL Error Log Dump:\n");
		IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
			  priv->status, priv->config, count);
	}

	IWL_ERROR("Desc       Time       asrtPC  blink2 "
		  "ilink1  nmiPC   Line\n");
	for (i = ERROR_START_OFFSET;
	     i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
	     i += ERROR_ELEM_SIZE) {
		desc = iwl_read_restricted_mem(priv, base + i);
		time =
		    iwl_read_restricted_mem(priv, base + i + 1 * sizeof(u32));
		blink1 =
		    iwl_read_restricted_mem(priv, base + i + 2 * sizeof(u32));
		blink2 =
		    iwl_read_restricted_mem(priv, base + i + 3 * sizeof(u32));
		ilink1 =
		    iwl_read_restricted_mem(priv, base + i + 4 * sizeof(u32));
		ilink2 =
		    iwl_read_restricted_mem(priv, base + i + 5 * sizeof(u32));
		data1 =
		    iwl_read_restricted_mem(priv, base + i + 6 * sizeof(u32));

		IWL_ERROR
		    ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
		     desc_lookup(desc), desc, time, blink1, blink2,
		     ilink1, ilink2, data1);
	}

	iwl_release_restricted_access(priv);

}

#define EVENT_START_OFFSET  (4 * sizeof(u32))

/**
 * iwl_print_event_log - Dump error event log to syslog
 *
 * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
 */
static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
				u32 num_events, u32 mode)
{
	u32 i;
	u32 base;       /* SRAM byte address of event log header */
	u32 event_size;	/* 2 u32s, or 3 u32s if timestamp recorded */
	u32 ptr;        /* SRAM byte address of log data */
	u32 ev, time, data; /* event log data */

	if (num_events == 0)
		return;

	base = le32_to_cpu(priv->card_alive.log_event_table_ptr);

	if (mode == 0)
		event_size = 2 * sizeof(u32);
	else
		event_size = 3 * sizeof(u32);

	ptr = base + EVENT_START_OFFSET + (start_idx * event_size);

	/* "time" is actually "data" for mode 0 (no timestamp).
	 * place event id # at far right for easier visual parsing. */
	for (i = 0; i < num_events; i++) {
		ev = iwl_read_restricted_mem(priv, ptr);
		ptr += sizeof(u32);
		time = iwl_read_restricted_mem(priv, ptr);
		ptr += sizeof(u32);
		if (mode == 0)
			IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
		else {
			data = iwl_read_restricted_mem(priv, ptr);
			ptr += sizeof(u32);
			IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
		}
	}
}

static void iwl_dump_nic_event_log(struct iwl_priv *priv)
{
	int rc;
	u32 base;       /* SRAM byte address of event log header */
	u32 capacity;   /* event log capacity in # entries */
	u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
	u32 num_wraps;  /* # times uCode wrapped to top of log */
	u32 next_entry; /* index of next entry to be written by uCode */
	u32 size;       /* # entries that we'll print */

	base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
	if (!iwl_hw_valid_rtc_data_addr(base)) {
		IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
		return;
	}

	rc = iwl_grab_restricted_access(priv);
	if (rc) {
		IWL_WARNING("Can not read from adapter at this time.\n");
		return;
	}

	/* event log header */
	capacity = iwl_read_restricted_mem(priv, base);
	mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
	num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
	next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));

	size = num_wraps ? capacity : next_entry;

	/* bail out if nothing in log */
	if (size == 0) {
		IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
		iwl_release_restricted_access(priv);
		return;
	}

	IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
		  size, num_wraps);

	/* if uCode has wrapped back to top of log, start at the oldest entry,
	 * i.e the next one that uCode would fill. */
	if (num_wraps)
		iwl_print_event_log(priv, next_entry,
				    capacity - next_entry, mode);

	/* (then/else) start at top of log */
	iwl_print_event_log(priv, 0, next_entry, mode);

	iwl_release_restricted_access(priv);
}

/**
 * iwl_irq_handle_error - called for HW or SW error interrupt from card
 */
static void iwl_irq_handle_error(struct iwl_priv *priv)
{
	/* Set the FW error flag -- cleared on iwl_down */
	set_bit(STATUS_FW_ERROR, &priv->status);

	/* Cancel currently queued command. */
	clear_bit(STATUS_HCMD_ACTIVE, &priv->status);

#ifdef CONFIG_IWLWIFI_DEBUG
	if (iwl_debug_level & IWL_DL_FW_ERRORS) {
		iwl_dump_nic_error_log(priv);
		iwl_dump_nic_event_log(priv);
		iwl_print_rx_config_cmd(&priv->staging_rxon);
	}
#endif

	wake_up_interruptible(&priv->wait_command_queue);

	/* Keep the restart process from trying to send host
	 * commands by clearing the INIT status bit */
	clear_bit(STATUS_READY, &priv->status);

	if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
		IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
			  "Restarting adapter due to uCode error.\n");

		if (iwl_is_associated(priv)) {
			memcpy(&priv->recovery_rxon, &priv->active_rxon,
			       sizeof(priv->recovery_rxon));
			priv->error_recovering = 1;
		}
		queue_work(priv->workqueue, &priv->restart);
	}
}

static void iwl_error_recovery(struct iwl_priv *priv)
{
	unsigned long flags;

	memcpy(&priv->staging_rxon, &priv->recovery_rxon,
	       sizeof(priv->staging_rxon));
	priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
	iwl_commit_rxon(priv);

	iwl_add_station(priv, priv->bssid, 1, 0);

	spin_lock_irqsave(&priv->lock, flags);
	priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
	priv->error_recovering = 0;
	spin_unlock_irqrestore(&priv->lock, flags);
}

static void iwl_irq_tasklet(struct iwl_priv *priv)
{
	u32 inta, handled = 0;
	u32 inta_fh;
	unsigned long flags;
#ifdef CONFIG_IWLWIFI_DEBUG
	u32 inta_mask;
#endif

	spin_lock_irqsave(&priv->lock, flags);

	/* Ack/clear/reset pending uCode interrupts.
	 * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
	 *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
	inta = iwl_read32(priv, CSR_INT);
	iwl_write32(priv, CSR_INT, inta);

	/* Ack/clear/reset pending flow-handler (DMA) interrupts.
	 * Any new interrupts that happen after this, either while we're
	 * in this tasklet, or later, will show up in next ISR/tasklet. */
	inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
	iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);

#ifdef CONFIG_IWLWIFI_DEBUG
	if (iwl_debug_level & IWL_DL_ISR) {
		inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
		IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
			      inta, inta_mask, inta_fh);
	}
#endif

	/* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
	 * atomic, make sure that inta covers all the interrupts that
	 * we've discovered, even if FH interrupt came in just after
	 * reading CSR_INT. */
	if (inta_fh & CSR_FH_INT_RX_MASK)
		inta |= CSR_INT_BIT_FH_RX;
	if (inta_fh & CSR_FH_INT_TX_MASK)
		inta |= CSR_INT_BIT_FH_TX;

	/* Now service all interrupt bits discovered above. */
	if (inta & CSR_INT_BIT_HW_ERR) {
		IWL_ERROR("Microcode HW error detected.  Restarting.\n");

		/* Tell the device to stop sending interrupts */
		iwl_disable_interrupts(priv);

		iwl_irq_handle_error(priv);

		handled |= CSR_INT_BIT_HW_ERR;

		spin_unlock_irqrestore(&priv->lock, flags);

		return;
	}

#ifdef CONFIG_IWLWIFI_DEBUG
	if (iwl_debug_level & (IWL_DL_ISR)) {
		/* NIC fires this, but we don't use it, redundant with WAKEUP */
		if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
			IWL_DEBUG_ISR("Microcode started or stopped.\n");

		/* Alive notification via Rx interrupt will do the real work */
		if (inta & CSR_INT_BIT_ALIVE)
			IWL_DEBUG_ISR("Alive interrupt\n");
	}
#endif
	/* Safely ignore these bits for debug checks below */
	inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);

	/* HW RF KILL switch toggled (4965 only) */
	if (inta & CSR_INT_BIT_RF_KILL) {
		int hw_rf_kill = 0;
		if (!(iwl_read32(priv, CSR_GP_CNTRL) &
				CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
			hw_rf_kill = 1;

		IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
				"RF_KILL bit toggled to %s.\n",
				hw_rf_kill ? "disable radio":"enable radio");

		/* Queue restart only if RF_KILL switch was set to "kill"
		 *   when we loaded driver, and is now set to "enable".
		 * After we're Alive, RF_KILL gets handled by
		 *   iwl_rx_card_state_notif() */
		if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
			queue_work(priv->workqueue, &priv->restart);

		handled |= CSR_INT_BIT_RF_KILL;
	}

	/* Chip got too hot and stopped itself (4965 only) */
	if (inta & CSR_INT_BIT_CT_KILL) {
		IWL_ERROR("Microcode CT kill error detected.\n");
		handled |= CSR_INT_BIT_CT_KILL;
	}

	/* Error detected by uCode */
	if (inta & CSR_INT_BIT_SW_ERR) {
		IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
			  inta);
		iwl_irq_handle_error(priv);
		handled |= CSR_INT_BIT_SW_ERR;
	}

	/* uCode wakes up after power-down sleep */
	if (inta & CSR_INT_BIT_WAKEUP) {
		IWL_DEBUG_ISR("Wakeup interrupt\n");
		iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
		iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
		iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
		iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
		iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
		iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
		iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);

		handled |= CSR_INT_BIT_WAKEUP;
	}

	/* All uCode command responses, including Tx command responses,
	 * Rx "responses" (frame-received notification), and other
	 * notifications from uCode come through here*/
	if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
		iwl_rx_handle(priv);
		handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
	}

	if (inta & CSR_INT_BIT_FH_TX) {
		IWL_DEBUG_ISR("Tx interrupt\n");

		iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
		if (!iwl_grab_restricted_access(priv)) {
			iwl_write_restricted(priv,
					     FH_TCSR_CREDIT
					     (ALM_FH_SRVC_CHNL), 0x0);
			iwl_release_restricted_access(priv);
		}
		handled |= CSR_INT_BIT_FH_TX;
	}

	if (inta & ~handled)
		IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);

	if (inta & ~CSR_INI_SET_MASK) {
		IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
			 inta & ~CSR_INI_SET_MASK);
		IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
	}

	/* Re-enable all interrupts */
	iwl_enable_interrupts(priv);

#ifdef CONFIG_IWLWIFI_DEBUG
	if (iwl_debug_level & (IWL_DL_ISR)) {
		inta = iwl_read32(priv, CSR_INT);
		inta_mask = iwl_read32(priv, CSR_INT_MASK);
		inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
		IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
			"flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
	}
#endif
	spin_unlock_irqrestore(&priv->lock, flags);
}

static irqreturn_t iwl_isr(int irq, void *data)
{
	struct iwl_priv *priv = data;
	u32 inta, inta_mask;
	u32 inta_fh;
	if (!priv)
		return IRQ_NONE;

	spin_lock(&priv->lock);

	/* Disable (but don't clear!) interrupts here to avoid
	 *    back-to-back ISRs and sporadic interrupts from our NIC.
	 * If we have something to service, the tasklet will re-enable ints.
	 * If we *don't* have something, we'll re-enable before leaving here. */
	inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
	iwl_write32(priv, CSR_INT_MASK, 0x00000000);

	/* Discover which interrupts are active/pending */
	inta = iwl_read32(priv, CSR_INT);
	inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);

	/* Ignore interrupt if there's nothing in NIC to service.
	 * This may be due to IRQ shared with another device,
	 * or due to sporadic interrupts thrown from our NIC. */
	if (!inta && !inta_fh) {
		IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
		goto none;
	}

	if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
		/* Hardware disappeared */
		IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
		goto unplugged;
	}

	IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
		      inta, inta_mask, inta_fh);

	/* iwl_irq_tasklet() will service interrupts and re-enable them */
	tasklet_schedule(&priv->irq_tasklet);
unplugged:
	spin_unlock(&priv->lock);

	return IRQ_HANDLED;

 none:
	/* re-enable interrupts here since we don't have anything to service. */
	iwl_enable_interrupts(priv);
	spin_unlock(&priv->lock);
	return IRQ_NONE;
}

/************************** EEPROM BANDS ****************************
 *
 * The iwl_eeprom_band definitions below provide the mapping from the
 * EEPROM contents to the specific channel number supported for each
 * band.
 *
 * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
 * The specific geography and calibration information for that channel
 * is contained in the eeprom map itself.
 *
 * During init, we copy the eeprom information and channel map
 * information into priv->channel_info_24/52 and priv->channel_map_24/52
 *
 * channel_map_24/52 provides the index in the channel_info array for a
 * given channel.  We have to have two separate maps as there is channel
 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
 * band_2
 *
 * A value of 0xff stored in the channel_map indicates that the channel
 * is not supported by the hardware at all.
 *
 * A value of 0xfe in the channel_map indicates that the channel is not
 * valid for Tx with the current hardware.  This means that
 * while the system can tune and receive on a given channel, it may not
 * be able to associate or transmit any frames on that
 * channel.  There is no corresponding channel information for that
 * entry.
 *
 *********************************************************************/

/* 2.4 GHz */
static const u8 iwl_eeprom_band_1[14] = {
	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
};

/* 5.2 GHz bands */
static const u8 iwl_eeprom_band_2[] = {
	183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
};

static const u8 iwl_eeprom_band_3[] = {	/* 5205-5320MHz */
	34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
};

static const u8 iwl_eeprom_band_4[] = {	/* 5500-5700MHz */
	100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
};

static const u8 iwl_eeprom_band_5[] = {	/* 5725-5825MHz */
	145, 149, 153, 157, 161, 165
};

static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
				    int *eeprom_ch_count,
				    const struct iwl_eeprom_channel
				    **eeprom_ch_info,
				    const u8 **eeprom_ch_index)
{
	switch (band) {
	case 1:		/* 2.4GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
		*eeprom_ch_info = priv->eeprom.band_1_channels;
		*eeprom_ch_index = iwl_eeprom_band_1;
		break;
	case 2:		/* 5.2GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
		*eeprom_ch_info = priv->eeprom.band_2_channels;
		*eeprom_ch_index = iwl_eeprom_band_2;
		break;
	case 3:		/* 5.2GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
		*eeprom_ch_info = priv->eeprom.band_3_channels;
		*eeprom_ch_index = iwl_eeprom_band_3;
		break;
	case 4:		/* 5.2GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
		*eeprom_ch_info = priv->eeprom.band_4_channels;
		*eeprom_ch_index = iwl_eeprom_band_4;
		break;
	case 5:		/* 5.2GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
		*eeprom_ch_info = priv->eeprom.band_5_channels;
		*eeprom_ch_index = iwl_eeprom_band_5;
		break;
	default:
		BUG();
		return;
	}
}

const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
						    int phymode, u16 channel)
{
	int i;

	switch (phymode) {
	case MODE_IEEE80211A:
		for (i = 14; i < priv->channel_count; i++) {
			if (priv->channel_info[i].channel == channel)
				return &priv->channel_info[i];
		}
		break;

	case MODE_IEEE80211B:
	case MODE_IEEE80211G:
		if (channel >= 1 && channel <= 14)
			return &priv->channel_info[channel - 1];
		break;

	}

	return NULL;
}

#define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
			    ? # x " " : "")

static int iwl_init_channel_map(struct iwl_priv *priv)
{
	int eeprom_ch_count = 0;
	const u8 *eeprom_ch_index = NULL;
	const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
	int band, ch;
	struct iwl_channel_info *ch_info;

	if (priv->channel_count) {
		IWL_DEBUG_INFO("Channel map already initialized.\n");
		return 0;
	}

	if (priv->eeprom.version < 0x2f) {
		IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
			    priv->eeprom.version);
		return -EINVAL;
	}

	IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");

	priv->channel_count =
	    ARRAY_SIZE(iwl_eeprom_band_1) +
	    ARRAY_SIZE(iwl_eeprom_band_2) +
	    ARRAY_SIZE(iwl_eeprom_band_3) +
	    ARRAY_SIZE(iwl_eeprom_band_4) +
	    ARRAY_SIZE(iwl_eeprom_band_5);

	IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);

	priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
				     priv->channel_count, GFP_KERNEL);
	if (!priv->channel_info) {
		IWL_ERROR("Could not allocate channel_info\n");
		priv->channel_count = 0;
		return -ENOMEM;
	}

	ch_info = priv->channel_info;

	/* Loop through the 5 EEPROM bands adding them in order to the
	 * channel map we maintain (that contains additional information than
	 * what just in the EEPROM) */
	for (band = 1; band <= 5; band++) {

		iwl_init_band_reference(priv, band, &eeprom_ch_count,
					&eeprom_ch_info, &eeprom_ch_index);

		/* Loop through each band adding each of the channels */
		for (ch = 0; ch < eeprom_ch_count; ch++) {
			ch_info->channel = eeprom_ch_index[ch];
			ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
			    MODE_IEEE80211A;

			/* permanently store EEPROM's channel regulatory flags
			 *   and max power in channel info database. */
			ch_info->eeprom = eeprom_ch_info[ch];

			/* Copy the run-time flags so they are there even on
			 * invalid channels */
			ch_info->flags = eeprom_ch_info[ch].flags;

			if (!(is_channel_valid(ch_info))) {
				IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
					       "No traffic\n",
					       ch_info->channel,
					       ch_info->flags,
					       is_channel_a_band(ch_info) ?
					       "5.2" : "2.4");
				ch_info++;
				continue;
			}

			/* Initialize regulatory-based run-time data */
			ch_info->max_power_avg = ch_info->curr_txpow =
			    eeprom_ch_info[ch].max_power_avg;
			ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
			ch_info->min_power = 0;

			IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
				       " %ddBm): Ad-Hoc %ssupported\n",
				       ch_info->channel,
				       is_channel_a_band(ch_info) ?
				       "5.2" : "2.4",
				       CHECK_AND_PRINT(IBSS),
				       CHECK_AND_PRINT(ACTIVE),
				       CHECK_AND_PRINT(RADAR),
				       CHECK_AND_PRINT(WIDE),
				       CHECK_AND_PRINT(NARROW),
				       CHECK_AND_PRINT(DFS),
				       eeprom_ch_info[ch].flags,
				       eeprom_ch_info[ch].max_power_avg,
				       ((eeprom_ch_info[ch].
					 flags & EEPROM_CHANNEL_IBSS)
					&& !(eeprom_ch_info[ch].
					     flags & EEPROM_CHANNEL_RADAR))
				       ? "" : "not ");

			/* Set the user_txpower_limit to the highest power
			 * supported by any channel */
			if (eeprom_ch_info[ch].max_power_avg >
			    priv->user_txpower_limit)
				priv->user_txpower_limit =
				    eeprom_ch_info[ch].max_power_avg;

			ch_info++;
		}
	}

	if (iwl3945_txpower_set_from_eeprom(priv))
		return -EIO;

	return 0;
}

/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
 * sending probe req.  This should be set long enough to hear probe responses
 * from more than one AP.  */
#define IWL_ACTIVE_DWELL_TIME_24    (20)	/* all times in msec */
#define IWL_ACTIVE_DWELL_TIME_52    (10)

/* For faster active scanning, scan will move to the next channel if fewer than
 * PLCP_QUIET_THRESH packets are heard on this channel within
 * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
 * time if it's a quiet channel (nothing responded to our probe, and there's
 * no other traffic).
 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
#define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)	/* packets */
#define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)	/* msec */

/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
 * Must be set longer than active dwell time.
 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
#define IWL_PASSIVE_DWELL_TIME_24   (20)	/* all times in msec */
#define IWL_PASSIVE_DWELL_TIME_52   (10)
#define IWL_PASSIVE_DWELL_BASE      (100)
#define IWL_CHANNEL_TUNE_TIME       5

static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
{
	if (phymode == MODE_IEEE80211A)
		return IWL_ACTIVE_DWELL_TIME_52;
	else
		return IWL_ACTIVE_DWELL_TIME_24;
}

static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
{
	u16 active = iwl_get_active_dwell_time(priv, phymode);
	u16 passive = (phymode != MODE_IEEE80211A) ?
	    IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
	    IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;

	if (iwl_is_associated(priv)) {
		/* If we're associated, we clamp the maximum passive
		 * dwell time to be 98% of the beacon interval (minus
		 * 2 * channel tune time) */
		passive = priv->beacon_int;
		if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
			passive = IWL_PASSIVE_DWELL_BASE;
		passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
	}

	if (passive <= active)
		passive = active + 1;

	return passive;
}

static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
				     u8 is_active, u8 direct_mask,
				     struct iwl_scan_channel *scan_ch)
{
	const struct ieee80211_channel *channels = NULL;
	const struct ieee80211_hw_mode *hw_mode;
	const struct iwl_channel_info *ch_info;
	u16 passive_dwell = 0;
	u16 active_dwell = 0;
	int added, i;

	hw_mode = iwl_get_hw_mode(priv, phymode);
	if (!hw_mode)
		return 0;

	channels = hw_mode->channels;

	active_dwell = iwl_get_active_dwell_time(priv, phymode);
	passive_dwell = iwl_get_passive_dwell_time(priv, phymode);

	for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
		if (channels[i].chan ==
		    le16_to_cpu(priv->active_rxon.channel)) {
			if (iwl_is_associated(priv)) {
				IWL_DEBUG_SCAN
				    ("Skipping current channel %d\n",
				     le16_to_cpu(priv->active_rxon.channel));
				continue;
			}
		} else if (priv->only_active_channel)
			continue;

		scan_ch->channel = channels[i].chan;

		ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
		if (!is_channel_valid(ch_info)) {
			IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
				       scan_ch->channel);
			continue;
		}

		if (!is_active || is_channel_passive(ch_info) ||
		    !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
			scan_ch->type = 0;	/* passive */
		else
			scan_ch->type = 1;	/* active */

		if (scan_ch->type & 1)
			scan_ch->type |= (direct_mask << 1);

		if (is_channel_narrow(ch_info))
			scan_ch->type |= (1 << 7);

		scan_ch->active_dwell = cpu_to_le16(active_dwell);
		scan_ch->passive_dwell = cpu_to_le16(passive_dwell);

		/* Set power levels to defaults */
		scan_ch->tpc.dsp_atten = 110;
		/* scan_pwr_info->tpc.dsp_atten; */

		/*scan_pwr_info->tpc.tx_gain; */
		if (phymode == MODE_IEEE80211A)
			scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
		else {
			scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
			/* NOTE: if we were doing 6Mb OFDM for scans we'd use
			 * power level
			 scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
			 */
		}

		IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
			       scan_ch->channel,
			       (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
			       (scan_ch->type & 1) ?
			       active_dwell : passive_dwell);

		scan_ch++;
		added++;
	}

	IWL_DEBUG_SCAN("total channels to scan %d \n", added);
	return added;
}

static void iwl_reset_channel_flag(struct iwl_priv *priv)
{
	int i, j;
	for (i = 0; i < 3; i++) {
		struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
		for (j = 0; j < hw_mode->num_channels; j++)
			hw_mode->channels[j].flag = hw_mode->channels[j].val;
	}
}

static void iwl_init_hw_rates(struct iwl_priv *priv,
			      struct ieee80211_rate *rates)
{
	int i;

	for (i = 0; i < IWL_RATE_COUNT; i++) {
		rates[i].rate = iwl_rates[i].ieee * 5;
		rates[i].val = i; /* Rate scaling will work on indexes */
		rates[i].val2 = i;
		rates[i].flags = IEEE80211_RATE_SUPPORTED;
		/* Only OFDM have the bits-per-symbol set */
		if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
			rates[i].flags |= IEEE80211_RATE_OFDM;
		else {
			/*
			 * If CCK 1M then set rate flag to CCK else CCK_2
			 * which is CCK | PREAMBLE2
			 */
			rates[i].flags |= (iwl_rates[i].plcp == 10) ?
				IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
		}

		/* Set up which ones are basic rates... */
		if (IWL_BASIC_RATES_MASK & (1 << i))
			rates[i].flags |= IEEE80211_RATE_BASIC;
	}
}

/**
 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
 */
static int iwl_init_geos(struct iwl_priv *priv)
{
	struct iwl_channel_info *ch;
	struct ieee80211_hw_mode *modes;
	struct ieee80211_channel *channels;
	struct ieee80211_channel *geo_ch;
	struct ieee80211_rate *rates;
	int i = 0;
	enum {
		A = 0,
		B = 1,
		G = 2,
	};
	int mode_count = 3;

	if (priv->modes) {
		IWL_DEBUG_INFO("Geography modes already initialized.\n");
		set_bit(STATUS_GEO_CONFIGURED, &priv->status);
		return 0;
	}

	modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
			GFP_KERNEL);
	if (!modes)
		return -ENOMEM;

	channels = kzalloc(sizeof(struct ieee80211_channel) *
			   priv->channel_count, GFP_KERNEL);
	if (!channels) {
		kfree(modes);
		return -ENOMEM;
	}

	rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
			GFP_KERNEL);
	if (!rates) {
		kfree(modes);
		kfree(channels);
		return -ENOMEM;
	}

	/* 0 = 802.11a
	 * 1 = 802.11b
	 * 2 = 802.11g
	 */

	/* 5.2GHz channels start after the 2.4GHz channels */
	modes[A].mode = MODE_IEEE80211A;
	modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
	modes[A].rates = &rates[4];
	modes[A].num_rates = 8;	/* just OFDM */
	modes[A].num_channels = 0;

	modes[B].mode = MODE_IEEE80211B;
	modes[B].channels = channels;
	modes[B].rates = rates;
	modes[B].num_rates = 4;	/* just CCK */
	modes[B].num_channels = 0;

	modes[G].mode = MODE_IEEE80211G;
	modes[G].channels = channels;
	modes[G].rates = rates;
	modes[G].num_rates = 12;	/* OFDM & CCK */
	modes[G].num_channels = 0;

	priv->ieee_channels = channels;
	priv->ieee_rates = rates;

	iwl_init_hw_rates(priv, rates);

	for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
		ch = &priv->channel_info[i];

		if (!is_channel_valid(ch)) {
			IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
				    "skipping.\n",
				    ch->channel, is_channel_a_band(ch) ?
				    "5.2" : "2.4");
			continue;
		}

		if (is_channel_a_band(ch))
			geo_ch = &modes[A].channels[modes[A].num_channels++];
		else {
			geo_ch = &modes[B].channels[modes[B].num_channels++];
			modes[G].num_channels++;
		}

		geo_ch->freq = ieee80211chan2mhz(ch->channel);
		geo_ch->chan = ch->channel;
		geo_ch->power_level = ch->max_power_avg;
		geo_ch->antenna_max = 0xff;

		if (is_channel_valid(ch)) {
			geo_ch->flag = IEEE80211_CHAN_W_SCAN;
			if (ch->flags & EEPROM_CHANNEL_IBSS)
				geo_ch->flag |= IEEE80211_CHAN_W_IBSS;

			if (ch->flags & EEPROM_CHANNEL_ACTIVE)
				geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;

			if (ch->flags & EEPROM_CHANNEL_RADAR)
				geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;

			if (ch->max_power_avg > priv->max_channel_txpower_limit)
				priv->max_channel_txpower_limit =
				    ch->max_power_avg;
		}

		geo_ch->val = geo_ch->flag;
	}

	if ((modes[A].num_channels == 0) && priv->is_abg) {
		printk(KERN_INFO DRV_NAME
		       ": Incorrectly detected BG card as ABG.  Please send "
		       "your PCI ID 0x%04X:0x%04X to maintainer.\n",
		       priv->pci_dev->device, priv->pci_dev->subsystem_device);
		priv->is_abg = 0;
	}

	printk(KERN_INFO DRV_NAME
	       ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
	       modes[G].num_channels, modes[A].num_channels);

	/*
	 * NOTE:  We register these in preference of order -- the
	 * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
	 * a phymode based on rates or AP capabilities but seems to
	 * configure it purely on if the channel being configured
	 * is supported by a mode -- and the first match is taken
	 */

	if (modes[G].num_channels)
		ieee80211_register_hwmode(priv->hw, &modes[G]);
	if (modes[B].num_channels)
		ieee80211_register_hwmode(priv->hw, &modes[B]);
	if (modes[A].num_channels)
		ieee80211_register_hwmode(priv->hw, &modes[A]);

	priv->modes = modes;
	set_bit(STATUS_GEO_CONFIGURED, &priv->status);

	return 0;
}

/******************************************************************************
 *
 * uCode download functions
 *
 ******************************************************************************/

static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
{
	if (priv->ucode_code.v_addr != NULL) {
		pci_free_consistent(priv->pci_dev,
				    priv->ucode_code.len,
				    priv->ucode_code.v_addr,
				    priv->ucode_code.p_addr);
		priv->ucode_code.v_addr = NULL;
	}
	if (priv->ucode_data.v_addr != NULL) {
		pci_free_consistent(priv->pci_dev,
				    priv->ucode_data.len,
				    priv->ucode_data.v_addr,
				    priv->ucode_data.p_addr);
		priv->ucode_data.v_addr = NULL;
	}
	if (priv->ucode_data_backup.v_addr != NULL) {
		pci_free_consistent(priv->pci_dev,
				    priv->ucode_data_backup.len,
				    priv->ucode_data_backup.v_addr,
				    priv->ucode_data_backup.p_addr);
		priv->ucode_data_backup.v_addr = NULL;
	}
	if (priv->ucode_init.v_addr != NULL) {
		pci_free_consistent(priv->pci_dev,
				    priv->ucode_init.len,
				    priv->ucode_init.v_addr,
				    priv->ucode_init.p_addr);
		priv->ucode_init.v_addr = NULL;
	}
	if (priv->ucode_init_data.v_addr != NULL) {
		pci_free_consistent(priv->pci_dev,
				    priv->ucode_init_data.len,
				    priv->ucode_init_data.v_addr,
				    priv->ucode_init_data.p_addr);
		priv->ucode_init_data.v_addr = NULL;
	}
	if (priv->ucode_boot.v_addr != NULL) {
		pci_free_consistent(priv->pci_dev,
				    priv->ucode_boot.len,
				    priv->ucode_boot.v_addr,
				    priv->ucode_boot.p_addr);
		priv->ucode_boot.v_addr = NULL;
	}
}

/**
 * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
 *     looking at all data.
 */
static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
{
	u32 val;
	u32 save_len = len;
	int rc = 0;
	u32 errcnt;

	IWL_DEBUG_INFO("ucode inst image size is %u\n", len);

	rc = iwl_grab_restricted_access(priv);
	if (rc)
		return rc;

	iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);

	errcnt = 0;
	for (; len > 0; len -= sizeof(u32), image++) {
		/* read data comes through single port, auto-incr addr */
		/* NOTE: Use the debugless read so we don't flood kernel log
		 * if IWL_DL_IO is set */
		val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
		if (val != le32_to_cpu(*image)) {
			IWL_ERROR("uCode INST section is invalid at "
				  "offset 0x%x, is 0x%x, s/b 0x%x\n",
				  save_len - len, val, le32_to_cpu(*image));
			rc = -EIO;
			errcnt++;
			if (errcnt >= 20)
				break;
		}
	}

	iwl_release_restricted_access(priv);

	if (!errcnt)
		IWL_DEBUG_INFO
		    ("ucode image in INSTRUCTION memory is good\n");

	return rc;
}


/**
 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
 *   using sample data 100 bytes apart.  If these sample points are good,
 *   it's a pretty good bet that everything between them is good, too.
 */
static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
{
	u32 val;
	int rc = 0;
	u32 errcnt = 0;
	u32 i;

	IWL_DEBUG_INFO("ucode inst image size is %u\n", len);

	rc = iwl_grab_restricted_access(priv);
	if (rc)
		return rc;

	for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
		/* read data comes through single port, auto-incr addr */
		/* NOTE: Use the debugless read so we don't flood kernel log
		 * if IWL_DL_IO is set */
		iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
			i + RTC_INST_LOWER_BOUND);
		val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
		if (val != le32_to_cpu(*image)) {
#if 0 /* Enable this if you want to see details */
			IWL_ERROR("uCode INST section is invalid at "
				  "offset 0x%x, is 0x%x, s/b 0x%x\n",
				  i, val, *image);
#endif
			rc = -EIO;
			errcnt++;
			if (errcnt >= 3)
				break;
		}
	}

	iwl_release_restricted_access(priv);

	return rc;
}


/**
 * iwl_verify_ucode - determine which instruction image is in SRAM,
 *    and verify its contents
 */
static int iwl_verify_ucode(struct iwl_priv *priv)
{
	__le32 *image;
	u32 len;
	int rc = 0;

	/* Try bootstrap */
	image = (__le32 *)priv->ucode_boot.v_addr;
	len = priv->ucode_boot.len;
	rc = iwl_verify_inst_sparse(priv, image, len);
	if (rc == 0) {
		IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
		return 0;
	}

	/* Try initialize */
	image = (__le32 *)priv->ucode_init.v_addr;
	len = priv->ucode_init.len;
	rc = iwl_verify_inst_sparse(priv, image, len);
	if (rc == 0) {
		IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
		return 0;
	}

	/* Try runtime/protocol */
	image = (__le32 *)priv->ucode_code.v_addr;
	len = priv->ucode_code.len;
	rc = iwl_verify_inst_sparse(priv, image, len);
	if (rc == 0) {
		IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
		return 0;
	}

	IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");

	/* Show first several data entries in instruction SRAM.
	 * Selection of bootstrap image is arbitrary. */
	image = (__le32 *)priv->ucode_boot.v_addr;
	len = priv->ucode_boot.len;
	rc = iwl_verify_inst_full(priv, image, len);

	return rc;
}


/* check contents of special bootstrap uCode SRAM */
static int iwl_verify_bsm(struct iwl_priv *priv)
{
	__le32 *image = priv->ucode_boot.v_addr;
	u32 len = priv->ucode_boot.len;
	u32 reg;
	u32 val;

	IWL_DEBUG_INFO("Begin verify bsm\n");

	/* verify BSM SRAM contents */
	val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
	for (reg = BSM_SRAM_LOWER_BOUND;
	     reg < BSM_SRAM_LOWER_BOUND + len;
	     reg += sizeof(u32), image ++) {
		val = iwl_read_restricted_reg(priv, reg);
		if (val != le32_to_cpu(*image)) {
			IWL_ERROR("BSM uCode verification failed at "
				  "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
				  BSM_SRAM_LOWER_BOUND,
				  reg - BSM_SRAM_LOWER_BOUND, len,
				  val, le32_to_cpu(*image));
			return -EIO;
		}
	}

	IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");

	return 0;
}

/**
 * iwl_load_bsm - Load bootstrap instructions
 *
 * BSM operation:
 *
 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
 * in special SRAM that does not power down during RFKILL.  When powering back
 * up after power-saving sleeps (or during initial uCode load), the BSM loads
 * the bootstrap program into the on-board processor, and starts it.
 *
 * The bootstrap program loads (via DMA) instructions and data for a new
 * program from host DRAM locations indicated by the host driver in the
 * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 * automatically.
 *
 * When initializing the NIC, the host driver points the BSM to the
 * "initialize" uCode image.  This uCode sets up some internal data, then
 * notifies host via "initialize alive" that it is complete.
 *
 * The host then replaces the BSM_DRAM_* pointer values to point to the
 * normal runtime uCode instructions and a backup uCode data cache buffer
 * (filled initially with starting data values for the on-board processor),
 * then triggers the "initialize" uCode to load and launch the runtime uCode,
 * which begins normal operation.
 *
 * When doing a power-save shutdown, runtime uCode saves data SRAM into
 * the backup data cache in DRAM before SRAM is powered down.
 *
 * When powering back up, the BSM loads the bootstrap program.  This reloads
 * the runtime uCode instructions and the backup data cache into SRAM,
 * and re-launches the runtime uCode from where it left off.
 */
static int iwl_load_bsm(struct iwl_priv *priv)
{
	__le32 *image = priv->ucode_boot.v_addr;
	u32 len = priv->ucode_boot.len;
	dma_addr_t pinst;
	dma_addr_t pdata;
	u32 inst_len;
	u32 data_len;
	int rc;
	int i;
	u32 done;
	u32 reg_offset;

	IWL_DEBUG_INFO("Begin load bsm\n");

	/* make sure bootstrap program is no larger than BSM's SRAM size */
	if (len > IWL_MAX_BSM_SIZE)
		return -EINVAL;

	/* Tell bootstrap uCode where to find the "Initialize" uCode
	 *   in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
	 * NOTE:  iwl_initialize_alive_start() will replace these values,
	 *        after the "initialize" uCode has run, to point to
	 *        runtime/protocol instructions and backup data cache. */
	pinst = priv->ucode_init.p_addr;
	pdata = priv->ucode_init_data.p_addr;
	inst_len = priv->ucode_init.len;
	data_len = priv->ucode_init_data.len;

	rc = iwl_grab_restricted_access(priv);
	if (rc)
		return rc;

	iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
	iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
	iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
	iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);

	/* Fill BSM memory with bootstrap instructions */
	for (reg_offset = BSM_SRAM_LOWER_BOUND;
	     reg_offset < BSM_SRAM_LOWER_BOUND + len;
	     reg_offset += sizeof(u32), image++)
		_iwl_write_restricted_reg(priv, reg_offset,
					  le32_to_cpu(*image));

	rc = iwl_verify_bsm(priv);
	if (rc) {
		iwl_release_restricted_access(priv);
		return rc;
	}

	/* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
	iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
	iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
				 RTC_INST_LOWER_BOUND);
	iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));

	/* Load bootstrap code into instruction SRAM now,
	 *   to prepare to load "initialize" uCode */
	iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
		BSM_WR_CTRL_REG_BIT_START);

	/* Wait for load of bootstrap uCode to finish */
	for (i = 0; i < 100; i++) {
		done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
		if (!(done & BSM_WR_CTRL_REG_BIT_START))
			break;
		udelay(10);
	}
	if (i < 100)
		IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
	else {
		IWL_ERROR("BSM write did not complete!\n");
		return -EIO;
	}

	/* Enable future boot loads whenever power management unit triggers it
	 *   (e.g. when powering back up after power-save shutdown) */
	iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
		BSM_WR_CTRL_REG_BIT_START_EN);

	iwl_release_restricted_access(priv);

	return 0;
}

static void iwl_nic_start(struct iwl_priv *priv)
{
	/* Remove all resets to allow NIC to operate */
	iwl_write32(priv, CSR_RESET, 0);
}

/**
 * iwl_read_ucode - Read uCode images from disk file.
 *
 * Copy into buffers for card to fetch via bus-mastering
 */
static int iwl_read_ucode(struct iwl_priv *priv)
{
	struct iwl_ucode *ucode;
	int rc = 0;
	const struct firmware *ucode_raw;
	/* firmware file name contains uCode/driver compatibility version */
	const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
	u8 *src;
	size_t len;
	u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;

	/* Ask kernel firmware_class module to get the boot firmware off disk.
	 * request_firmware() is synchronous, file is in memory on return. */
	rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
	if (rc < 0) {
		IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
		goto error;
	}

	IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
		       name, ucode_raw->size);

	/* Make sure that we got at least our header! */
	if (ucode_raw->size < sizeof(*ucode)) {
		IWL_ERROR("File size way too small!\n");
		rc = -EINVAL;
		goto err_release;
	}

	/* Data from ucode file:  header followed by uCode images */
	ucode = (void *)ucode_raw->data;

	ver = le32_to_cpu(ucode->ver);
	inst_size = le32_to_cpu(ucode->inst_size);
	data_size = le32_to_cpu(ucode->data_size);
	init_size = le32_to_cpu(ucode->init_size);
	init_data_size = le32_to_cpu(ucode->init_data_size);
	boot_size = le32_to_cpu(ucode->boot_size);

	IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
	IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
		       inst_size);
	IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
		       data_size);
	IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
		       init_size);
	IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
		       init_data_size);
	IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
		       boot_size);

	/* Verify size of file vs. image size info in file's header */
	if (ucode_raw->size < sizeof(*ucode) +
		inst_size + data_size + init_size +
		init_data_size + boot_size) {

		IWL_DEBUG_INFO("uCode file size %d too small\n",
			       (int)ucode_raw->size);
		rc = -EINVAL;
		goto err_release;
	}

	/* Verify that uCode images will fit in card's SRAM */
	if (inst_size > IWL_MAX_INST_SIZE) {
		IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
			       (int)inst_size);
		rc = -EINVAL;
		goto err_release;
	}

	if (data_size > IWL_MAX_DATA_SIZE) {
		IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
			       (int)data_size);
		rc = -EINVAL;
		goto err_release;
	}
	if (init_size > IWL_MAX_INST_SIZE) {
		IWL_DEBUG_INFO
		    ("uCode init instr len %d too large to fit in card\n",
		     (int)init_size);
		rc = -EINVAL;
		goto err_release;
	}
	if (init_data_size > IWL_MAX_DATA_SIZE) {
		IWL_DEBUG_INFO
		    ("uCode init data len %d too large to fit in card\n",
		     (int)init_data_size);
		rc = -EINVAL;
		goto err_release;
	}
	if (boot_size > IWL_MAX_BSM_SIZE) {
		IWL_DEBUG_INFO
		    ("uCode boot instr len %d too large to fit in bsm\n",
		     (int)boot_size);
		rc = -EINVAL;
		goto err_release;
	}

	/* Allocate ucode buffers for card's bus-master loading ... */

	/* Runtime instructions and 2 copies of data:
	 * 1) unmodified from disk
	 * 2) backup cache for save/restore during power-downs */
	priv->ucode_code.len = inst_size;
	priv->ucode_code.v_addr =
	    pci_alloc_consistent(priv->pci_dev,
				 priv->ucode_code.len,
				 &(priv->ucode_code.p_addr));

	priv->ucode_data.len = data_size;
	priv->ucode_data.v_addr =
	    pci_alloc_consistent(priv->pci_dev,
				 priv->ucode_data.len,
				 &(priv->ucode_data.p_addr));

	priv->ucode_data_backup.len = data_size;
	priv->ucode_data_backup.v_addr =
	    pci_alloc_consistent(priv->pci_dev,
				 priv->ucode_data_backup.len,
				 &(priv->ucode_data_backup.p_addr));


	/* Initialization instructions and data */
	priv->ucode_init.len = init_size;
	priv->ucode_init.v_addr =
	    pci_alloc_consistent(priv->pci_dev,
				 priv->ucode_init.len,
				 &(priv->ucode_init.p_addr));

	priv->ucode_init_data.len = init_data_size;
	priv->ucode_init_data.v_addr =
	    pci_alloc_consistent(priv->pci_dev,
				 priv->ucode_init_data.len,
				 &(priv->ucode_init_data.p_addr));

	/* Bootstrap (instructions only, no data) */
	priv->ucode_boot.len = boot_size;
	priv->ucode_boot.v_addr =
	    pci_alloc_consistent(priv->pci_dev,
				 priv->ucode_boot.len,
				 &(priv->ucode_boot.p_addr));

	if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
	    !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
	    !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
		goto err_pci_alloc;

	/* Copy images into buffers for card's bus-master reads ... */

	/* Runtime instructions (first block of data in file) */
	src = &ucode->data[0];
	len = priv->ucode_code.len;
	IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
		       (int)len);
	memcpy(priv->ucode_code.v_addr, src, len);
	IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
		priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);

	/* Runtime data (2nd block)
	 * NOTE:  Copy into backup buffer will be done in iwl_up()  */
	src = &ucode->data[inst_size];
	len = priv->ucode_data.len;
	IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
		       (int)len);
	memcpy(priv->ucode_data.v_addr, src, len);
	memcpy(priv->ucode_data_backup.v_addr, src, len);

	/* Initialization instructions (3rd block) */
	if (init_size) {
		src = &ucode->data[inst_size + data_size];
		len = priv->ucode_init.len;
		IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
			       (int)len);
		memcpy(priv->ucode_init.v_addr, src, len);
	}

	/* Initialization data (4th block) */
	if (init_data_size) {
		src = &ucode->data[inst_size + data_size + init_size];
		len = priv->ucode_init_data.len;
		IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
			       (int)len);
		memcpy(priv->ucode_init_data.v_addr, src, len);
	}

	/* Bootstrap instructions (5th block) */
	src = &ucode->data[inst_size + data_size + init_size + init_data_size];
	len = priv->ucode_boot.len;
	IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
		       (int)len);
	memcpy(priv->ucode_boot.v_addr, src, len);

	/* We have our copies now, allow OS release its copies */
	release_firmware(ucode_raw);
	return 0;

 err_pci_alloc:
	IWL_ERROR("failed to allocate pci memory\n");
	rc = -ENOMEM;
	iwl_dealloc_ucode_pci(priv);

 err_release:
	release_firmware(ucode_raw);

 error:
	return rc;
}


/**
 * iwl_set_ucode_ptrs - Set uCode address location
 *
 * Tell initialization uCode where to find runtime uCode.
 *
 * BSM registers initially contain pointers to initialization uCode.
 * We need to replace them to load runtime uCode inst and data,
 * and to save runtime data when powering down.
 */
static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
{
	dma_addr_t pinst;
	dma_addr_t pdata;
	int rc = 0;
	unsigned long flags;

	/* bits 31:0 for 3945 */
	pinst = priv->ucode_code.p_addr;
	pdata = priv->ucode_data_backup.p_addr;

	spin_lock_irqsave(&priv->lock, flags);
	rc = iwl_grab_restricted_access(priv);
	if (rc) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return rc;
	}

	/* Tell bootstrap uCode where to find image to load */
	iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
	iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
	iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
				 priv->ucode_data.len);

	/* Inst bytecount must be last to set up, bit 31 signals uCode
	 *   that all new ptr/size info is in place */
	iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
				 priv->ucode_code.len | BSM_DRAM_INST_LOAD);

	iwl_release_restricted_access(priv);

	spin_unlock_irqrestore(&priv->lock, flags);

	IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");

	return rc;
}

/**
 * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
 *
 * Called after REPLY_ALIVE notification received from "initialize" uCode.
 *
 * The 4965 "initialize" ALIVE reply contains calibration data for:
 *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
 *   (3945 does not contain this data).
 *
 * Tell "initialize" uCode to go ahead and load the runtime uCode.
*/
static void iwl_init_alive_start(struct iwl_priv *priv)
{
	/* Check alive response for "valid" sign from uCode */
	if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
		/* We had an error bringing up the hardware, so take it
		 * all the way back down so we can try again */
		IWL_DEBUG_INFO("Initialize Alive failed.\n");
		goto restart;
	}

	/* Bootstrap uCode has loaded initialize uCode ... verify inst image.
	 * This is a paranoid check, because we would not have gotten the
	 * "initialize" alive if code weren't properly loaded.  */
	if (iwl_verify_ucode(priv)) {
		/* Runtime instruction load was bad;
		 * take it all the way back down so we can try again */
		IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
		goto restart;
	}

	/* Send pointers to protocol/runtime uCode image ... init code will
	 * load and launch runtime uCode, which will send us another "Alive"
	 * notification. */
	IWL_DEBUG_INFO("Initialization Alive received.\n");
	if (iwl_set_ucode_ptrs(priv)) {
		/* Runtime instruction load won't happen;
		 * take it all the way back down so we can try again */
		IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
		goto restart;
	}
	return;

 restart:
	queue_work(priv->workqueue, &priv->restart);
}


/**
 * iwl_alive_start - called after REPLY_ALIVE notification received
 *                   from protocol/runtime uCode (initialization uCode's
 *                   Alive gets handled by iwl_init_alive_start()).
 */
static void iwl_alive_start(struct iwl_priv *priv)
{
	int rc = 0;
	int thermal_spin = 0;
	u32 rfkill;

	IWL_DEBUG_INFO("Runtime Alive received.\n");

	if (priv->card_alive.is_valid != UCODE_VALID_OK) {
		/* We had an error bringing up the hardware, so take it
		 * all the way back down so we can try again */
		IWL_DEBUG_INFO("Alive failed.\n");
		goto restart;
	}

	/* Initialize uCode has loaded Runtime uCode ... verify inst image.
	 * This is a paranoid check, because we would not have gotten the
	 * "runtime" alive if code weren't properly loaded.  */
	if (iwl_verify_ucode(priv)) {
		/* Runtime instruction load was bad;
		 * take it all the way back down so we can try again */
		IWL_DEBUG_INFO("Bad runtime uCode load.\n");
		goto restart;
	}

	iwl_clear_stations_table(priv);

	rc = iwl_grab_restricted_access(priv);
	if (rc) {
		IWL_WARNING("Can not read rfkill status from adapter\n");
		return;
	}

	rfkill = iwl_read_restricted_reg(priv, APMG_RFKILL_REG);
	IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
	iwl_release_restricted_access(priv);

	if (rfkill & 0x1) {
		clear_bit(STATUS_RF_KILL_HW, &priv->status);
		/* if rfkill is not on, then wait for thermal
		 * sensor in adapter to kick in */
		while (iwl_hw_get_temperature(priv) == 0) {
			thermal_spin++;
			udelay(10);
		}

		if (thermal_spin)
			IWL_DEBUG_INFO("Thermal calibration took %dus\n",
				       thermal_spin * 10);
	} else
		set_bit(STATUS_RF_KILL_HW, &priv->status);

	/* After the ALIVE response, we can process host commands */
	set_bit(STATUS_ALIVE, &priv->status);

	/* Clear out the uCode error bit if it is set */
	clear_bit(STATUS_FW_ERROR, &priv->status);

	rc = iwl_init_channel_map(priv);
	if (rc) {
		IWL_ERROR("initializing regulatory failed: %d\n", rc);
		return;
	}

	iwl_init_geos(priv);

	if (iwl_is_rfkill(priv))
		return;

	if (!priv->mac80211_registered) {
		/* Unlock so any user space entry points can call back into
		 * the driver without a deadlock... */
		mutex_unlock(&priv->mutex);
		iwl_rate_control_register(priv->hw);
		rc = ieee80211_register_hw(priv->hw);
		priv->hw->conf.beacon_int = 100;
		mutex_lock(&priv->mutex);

		if (rc) {
			IWL_ERROR("Failed to register network "
				  "device (error %d)\n", rc);
			return;
		}

		priv->mac80211_registered = 1;

		iwl_reset_channel_flag(priv);
	} else
		ieee80211_start_queues(priv->hw);

	priv->active_rate = priv->rates_mask;
	priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;

	iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));

	if (iwl_is_associated(priv)) {
		struct iwl_rxon_cmd *active_rxon =
				(struct iwl_rxon_cmd *)(&priv->active_rxon);

		memcpy(&priv->staging_rxon, &priv->active_rxon,
		       sizeof(priv->staging_rxon));
		active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
	} else {
		/* Initialize our rx_config data */
		iwl_connection_init_rx_config(priv);
		memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
	}

	/* Configure BT coexistence */
	iwl_send_bt_config(priv);

	/* Configure the adapter for unassociated operation */
	iwl_commit_rxon(priv);

	/* At this point, the NIC is initialized and operational */
	priv->notif_missed_beacons = 0;
	set_bit(STATUS_READY, &priv->status);

	iwl3945_reg_txpower_periodic(priv);

	IWL_DEBUG_INFO("ALIVE processing complete.\n");

	if (priv->error_recovering)
		iwl_error_recovery(priv);

	return;

 restart:
	queue_work(priv->workqueue, &priv->restart);
}

static void iwl_cancel_deferred_work(struct iwl_priv *priv);

static void __iwl_down(struct iwl_priv *priv)
{
	unsigned long flags;
	int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
	struct ieee80211_conf *conf = NULL;

	IWL_DEBUG_INFO(DRV_NAME " is going down\n");

	conf = ieee80211_get_hw_conf(priv->hw);

	if (!exit_pending)
		set_bit(STATUS_EXIT_PENDING, &priv->status);

	iwl_clear_stations_table(priv);

	/* Unblock any waiting calls */
	wake_up_interruptible_all(&priv->wait_command_queue);

	iwl_cancel_deferred_work(priv);

	/* Wipe out the EXIT_PENDING status bit if we are not actually
	 * exiting the module */
	if (!exit_pending)
		clear_bit(STATUS_EXIT_PENDING, &priv->status);

	/* stop and reset the on-board processor */
	iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);

	/* tell the device to stop sending interrupts */
	iwl_disable_interrupts(priv);

	if (priv->mac80211_registered)
		ieee80211_stop_queues(priv->hw);

	/* If we have not previously called iwl_init() then
	 * clear all bits but the RF Kill and SUSPEND bits and return */
	if (!iwl_is_init(priv)) {
		priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
					STATUS_RF_KILL_HW |
			       test_bit(STATUS_RF_KILL_SW, &priv->status) <<
					STATUS_RF_KILL_SW |
			       test_bit(STATUS_IN_SUSPEND, &priv->status) <<
					STATUS_IN_SUSPEND;
		goto exit;
	}

	/* ...otherwise clear out all the status bits but the RF Kill and
	 * SUSPEND bits and continue taking the NIC down. */
	priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
				STATUS_RF_KILL_HW |
			test_bit(STATUS_RF_KILL_SW, &priv->status) <<
				STATUS_RF_KILL_SW |
			test_bit(STATUS_IN_SUSPEND, &priv->status) <<
				STATUS_IN_SUSPEND |
			test_bit(STATUS_FW_ERROR, &priv->status) <<
				STATUS_FW_ERROR;

	spin_lock_irqsave(&priv->lock, flags);
	iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
	spin_unlock_irqrestore(&priv->lock, flags);

	iwl_hw_txq_ctx_stop(priv);
	iwl_hw_rxq_stop(priv);

	spin_lock_irqsave(&priv->lock, flags);
	if (!iwl_grab_restricted_access(priv)) {
		iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
					 APMG_CLK_VAL_DMA_CLK_RQT);
		iwl_release_restricted_access(priv);
	}
	spin_unlock_irqrestore(&priv->lock, flags);

	udelay(5);

	iwl_hw_nic_stop_master(priv);
	iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
	iwl_hw_nic_reset(priv);

 exit:
	memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));

	if (priv->ibss_beacon)
		dev_kfree_skb(priv->ibss_beacon);
	priv->ibss_beacon = NULL;

	/* clear out any free frames */
	iwl_clear_free_frames(priv);
}

static void iwl_down(struct iwl_priv *priv)
{
	mutex_lock(&priv->mutex);
	__iwl_down(priv);
	mutex_unlock(&priv->mutex);
}

#define MAX_HW_RESTARTS 5

static int __iwl_up(struct iwl_priv *priv)
{
	DECLARE_MAC_BUF(mac);
	int rc, i;

	if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
		IWL_WARNING("Exit pending; will not bring the NIC up\n");
		return -EIO;
	}

	if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
		IWL_WARNING("Radio disabled by SW RF kill (module "
			    "parameter)\n");
		return 0;
	}

	iwl_write32(priv, CSR_INT, 0xFFFFFFFF);

	rc = iwl_hw_nic_init(priv);
	if (rc) {
		IWL_ERROR("Unable to int nic\n");
		return rc;
	}

	/* make sure rfkill handshake bits are cleared */
	iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
	iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
		    CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);

	/* clear (again), then enable host interrupts */
	iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
	iwl_enable_interrupts(priv);

	/* really make sure rfkill handshake bits are cleared */
	iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
	iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);

	/* Copy original ucode data image from disk into backup cache.
	 * This will be used to initialize the on-board processor's
	 * data SRAM for a clean start when the runtime program first loads. */
	memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
			priv->ucode_data.len);

	for (i = 0; i < MAX_HW_RESTARTS; i++) {

		iwl_clear_stations_table(priv);

		/* load bootstrap state machine,
		 * load bootstrap program into processor's memory,
		 * prepare to load the "initialize" uCode */
		rc = iwl_load_bsm(priv);

		if (rc) {
			IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
			continue;
		}

		/* start card; "initialize" will load runtime ucode */
		iwl_nic_start(priv);

		/* MAC Address location in EEPROM same for 3945/4965 */
		get_eeprom_mac(priv, priv->mac_addr);
		IWL_DEBUG_INFO("MAC address: %s\n",
			       print_mac(mac, priv->mac_addr));

		SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);

		IWL_DEBUG_INFO(DRV_NAME " is coming up\n");

		return 0;
	}

	set_bit(STATUS_EXIT_PENDING, &priv->status);
	__iwl_down(priv);

	/* tried to restart and config the device for as long as our
	 * patience could withstand */
	IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
	return -EIO;
}


/*****************************************************************************
 *
 * Workqueue callbacks
 *
 *****************************************************************************/

static void iwl_bg_init_alive_start(struct work_struct *data)
{
	struct iwl_priv *priv =
	    container_of(data, struct iwl_priv, init_alive_start.work);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);
	iwl_init_alive_start(priv);
	mutex_unlock(&priv->mutex);
}

static void iwl_bg_alive_start(struct work_struct *data)
{
	struct iwl_priv *priv =
	    container_of(data, struct iwl_priv, alive_start.work);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);
	iwl_alive_start(priv);
	mutex_unlock(&priv->mutex);
}

static void iwl_bg_rf_kill(struct work_struct *work)
{
	struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);

	wake_up_interruptible(&priv->wait_command_queue);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);

	if (!iwl_is_rfkill(priv)) {
		IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
			  "HW and/or SW RF Kill no longer active, restarting "
			  "device\n");
		if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
			queue_work(priv->workqueue, &priv->restart);
	} else {

		if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
			IWL_DEBUG_RF_KILL("Can not turn radio back on - "
					  "disabled by SW switch\n");
		else
			IWL_WARNING("Radio Frequency Kill Switch is On:\n"
				    "Kill switch must be turned off for "
				    "wireless networking to work.\n");
	}
	mutex_unlock(&priv->mutex);
}

#define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)

static void iwl_bg_scan_check(struct work_struct *data)
{
	struct iwl_priv *priv =
	    container_of(data, struct iwl_priv, scan_check.work);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);
	if (test_bit(STATUS_SCANNING, &priv->status) ||
	    test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
		IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
			  "Scan completion watchdog resetting adapter (%dms)\n",
			  jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));

		if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
			iwl_send_scan_abort(priv);
	}
	mutex_unlock(&priv->mutex);
}

static void iwl_bg_request_scan(struct work_struct *data)
{
	struct iwl_priv *priv =
	    container_of(data, struct iwl_priv, request_scan);
	struct iwl_host_cmd cmd = {
		.id = REPLY_SCAN_CMD,
		.len = sizeof(struct iwl_scan_cmd),
		.meta.flags = CMD_SIZE_HUGE,
	};
	int rc = 0;
	struct iwl_scan_cmd *scan;
	struct ieee80211_conf *conf = NULL;
	u8 direct_mask;
	int phymode;

	conf = ieee80211_get_hw_conf(priv->hw);

	mutex_lock(&priv->mutex);

	if (!iwl_is_ready(priv)) {
		IWL_WARNING("request scan called when driver not ready.\n");
		goto done;
	}

	/* Make sure the scan wasn't cancelled before this queued work
	 * was given the chance to run... */
	if (!test_bit(STATUS_SCANNING, &priv->status))
		goto done;

	/* This should never be called or scheduled if there is currently
	 * a scan active in the hardware. */
	if (test_bit(STATUS_SCAN_HW, &priv->status)) {
		IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
			       "Ignoring second request.\n");
		rc = -EIO;
		goto done;
	}

	if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
		IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
		goto done;
	}

	if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
		IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
		goto done;
	}

	if (iwl_is_rfkill(priv)) {
		IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
		goto done;
	}

	if (!test_bit(STATUS_READY, &priv->status)) {
		IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
		goto done;
	}

	if (!priv->scan_bands) {
		IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
		goto done;
	}

	if (!priv->scan) {
		priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
				     IWL_MAX_SCAN_SIZE, GFP_KERNEL);
		if (!priv->scan) {
			rc = -ENOMEM;
			goto done;
		}
	}
	scan = priv->scan;
	memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);

	scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
	scan->quiet_time = IWL_ACTIVE_QUIET_TIME;

	if (iwl_is_associated(priv)) {
		u16 interval = 0;
		u32 extra;
		u32 suspend_time = 100;
		u32 scan_suspend_time = 100;
		unsigned long flags;

		IWL_DEBUG_INFO("Scanning while associated...\n");

		spin_lock_irqsave(&priv->lock, flags);
		interval = priv->beacon_int;
		spin_unlock_irqrestore(&priv->lock, flags);

		scan->suspend_time = 0;
		scan->max_out_time = cpu_to_le32(200 * 1024);
		if (!interval)
			interval = suspend_time;
		/*
		 * suspend time format:
		 *  0-19: beacon interval in usec (time before exec.)
		 * 20-23: 0
		 * 24-31: number of beacons (suspend between channels)
		 */

		extra = (suspend_time / interval) << 24;
		scan_suspend_time = 0xFF0FFFFF &
		    (extra | ((suspend_time % interval) * 1024));

		scan->suspend_time = cpu_to_le32(scan_suspend_time);
		IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
			       scan_suspend_time, interval);
	}

	/* We should add the ability for user to lock to PASSIVE ONLY */
	if (priv->one_direct_scan) {
		IWL_DEBUG_SCAN
		    ("Kicking off one direct scan for '%s'\n",
		     iwl_escape_essid(priv->direct_ssid,
				      priv->direct_ssid_len));
		scan->direct_scan[0].id = WLAN_EID_SSID;
		scan->direct_scan[0].len = priv->direct_ssid_len;
		memcpy(scan->direct_scan[0].ssid,
		       priv->direct_ssid, priv->direct_ssid_len);
		direct_mask = 1;
	} else if (!iwl_is_associated(priv) && priv->essid_len) {
		scan->direct_scan[0].id = WLAN_EID_SSID;
		scan->direct_scan[0].len = priv->essid_len;
		memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
		direct_mask = 1;
	} else
		direct_mask = 0;

	/* We don't build a direct scan probe request; the uCode will do
	 * that based on the direct_mask added to each channel entry */
	scan->tx_cmd.len = cpu_to_le16(
		iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
			IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
	scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
	scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
	scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;

	/* flags + rate selection */

	switch (priv->scan_bands) {
	case 2:
		scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
		scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
		scan->good_CRC_th = 0;
		phymode = MODE_IEEE80211G;
		break;

	case 1:
		scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
		scan->good_CRC_th = IWL_GOOD_CRC_TH;
		phymode = MODE_IEEE80211A;
		break;

	default:
		IWL_WARNING("Invalid scan band count\n");
		goto done;
	}

	/* select Rx antennas */
	scan->flags |= iwl3945_get_antenna_flags(priv);

	if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
		scan->filter_flags = RXON_FILTER_PROMISC_MSK;

	if (direct_mask)
		IWL_DEBUG_SCAN
		    ("Initiating direct scan for %s.\n",
		     iwl_escape_essid(priv->essid, priv->essid_len));
	else
		IWL_DEBUG_SCAN("Initiating indirect scan.\n");

	scan->channel_count =
		iwl_get_channels_for_scan(
			priv, phymode, 1, /* active */
			direct_mask,
			(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);

	cmd.len += le16_to_cpu(scan->tx_cmd.len) +
	    scan->channel_count * sizeof(struct iwl_scan_channel);
	cmd.data = scan;
	scan->len = cpu_to_le16(cmd.len);

	set_bit(STATUS_SCAN_HW, &priv->status);
	rc = iwl_send_cmd_sync(priv, &cmd);
	if (rc)
		goto done;

	queue_delayed_work(priv->workqueue, &priv->scan_check,
			   IWL_SCAN_CHECK_WATCHDOG);

	mutex_unlock(&priv->mutex);
	return;

 done:
	/* inform mac80211 sacn aborted */
	queue_work(priv->workqueue, &priv->scan_completed);
	mutex_unlock(&priv->mutex);
}

static void iwl_bg_up(struct work_struct *data)
{
	struct iwl_priv *priv = container_of(data, struct iwl_priv, up);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);
	__iwl_up(priv);
	mutex_unlock(&priv->mutex);
}

static void iwl_bg_restart(struct work_struct *data)
{
	struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	iwl_down(priv);
	queue_work(priv->workqueue, &priv->up);
}

static void iwl_bg_rx_replenish(struct work_struct *data)
{
	struct iwl_priv *priv =
	    container_of(data, struct iwl_priv, rx_replenish);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);
	iwl_rx_replenish(priv);
	mutex_unlock(&priv->mutex);
}

static void iwl_bg_post_associate(struct work_struct *data)
{
	struct iwl_priv *priv = container_of(data, struct iwl_priv,
					     post_associate.work);

	int rc = 0;
	struct ieee80211_conf *conf = NULL;
	DECLARE_MAC_BUF(mac);

	if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
		IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
		return;
	}


	IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
			priv->assoc_id,
			print_mac(mac, priv->active_rxon.bssid_addr));

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);

	if (!priv->interface_id || !priv->is_open) {
		mutex_unlock(&priv->mutex);
		return;
	}
	iwl_scan_cancel_timeout(priv, 200);

	conf = ieee80211_get_hw_conf(priv->hw);

	priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
	iwl_commit_rxon(priv);

	memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
	iwl_setup_rxon_timing(priv);
	rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
			      sizeof(priv->rxon_timing), &priv->rxon_timing);
	if (rc)
		IWL_WARNING("REPLY_RXON_TIMING failed - "
			    "Attempting to continue.\n");

	priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;

	priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);

	IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
			priv->assoc_id, priv->beacon_int);

	if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
		priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
	else
		priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;

	if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
		if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
			priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
		else
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

		if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

	}

	iwl_commit_rxon(priv);

	switch (priv->iw_mode) {
	case IEEE80211_IF_TYPE_STA:
		iwl_rate_scale_init(priv->hw, IWL_AP_ID);
		break;

	case IEEE80211_IF_TYPE_IBSS:

		/* clear out the station table */
		iwl_clear_stations_table(priv);

		iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
		iwl_add_station(priv, priv->bssid, 0, 0);
		iwl3945_sync_sta(priv, IWL_STA_ID,
				 (priv->phymode == MODE_IEEE80211A)?
				 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
				 CMD_ASYNC);
		iwl_rate_scale_init(priv->hw, IWL_STA_ID);
		iwl_send_beacon_cmd(priv);

		break;

	default:
		 IWL_ERROR("%s Should not be called in %d mode\n",
				__FUNCTION__, priv->iw_mode);
		break;
	}

	iwl_sequence_reset(priv);

#ifdef CONFIG_IWLWIFI_QOS
	iwl_activate_qos(priv, 0);
#endif /* CONFIG_IWLWIFI_QOS */
	mutex_unlock(&priv->mutex);
}

static void iwl_bg_abort_scan(struct work_struct *work)
{
	struct iwl_priv *priv = container_of(work, struct iwl_priv,
					     abort_scan);

	if (!iwl_is_ready(priv))
		return;

	mutex_lock(&priv->mutex);

	set_bit(STATUS_SCAN_ABORTING, &priv->status);
	iwl_send_scan_abort(priv);

	mutex_unlock(&priv->mutex);
}

static void iwl_bg_scan_completed(struct work_struct *work)
{
	struct iwl_priv *priv =
	    container_of(work, struct iwl_priv, scan_completed);

	IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	ieee80211_scan_completed(priv->hw);

	/* Since setting the TXPOWER may have been deferred while
	 * performing the scan, fire one off */
	mutex_lock(&priv->mutex);
	iwl_hw_reg_send_txpower(priv);
	mutex_unlock(&priv->mutex);
}

/*****************************************************************************
 *
 * mac80211 entry point functions
 *
 *****************************************************************************/

static int iwl_mac_start(struct ieee80211_hw *hw)
{
	struct iwl_priv *priv = hw->priv;

	IWL_DEBUG_MAC80211("enter\n");

	/* we should be verifying the device is ready to be opened */
	mutex_lock(&priv->mutex);

	priv->is_open = 1;

	if (!iwl_is_rfkill(priv))
		ieee80211_start_queues(priv->hw);

	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211("leave\n");
	return 0;
}

static void iwl_mac_stop(struct ieee80211_hw *hw)
{
	struct iwl_priv *priv = hw->priv;

	IWL_DEBUG_MAC80211("enter\n");


	mutex_lock(&priv->mutex);
	/* stop mac, cancel any scan request and clear
	 * RXON_FILTER_ASSOC_MSK BIT
	 */
	priv->is_open = 0;
	iwl_scan_cancel_timeout(priv, 100);
	cancel_delayed_work(&priv->post_associate);
	priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
	iwl_commit_rxon(priv);
	mutex_unlock(&priv->mutex);

	IWL_DEBUG_MAC80211("leave\n");
}

static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
		      struct ieee80211_tx_control *ctl)
{
	struct iwl_priv *priv = hw->priv;

	IWL_DEBUG_MAC80211("enter\n");

	if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
		IWL_DEBUG_MAC80211("leave - monitor\n");
		return -1;
	}

	IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
		     ctl->tx_rate);

	if (iwl_tx_skb(priv, skb, ctl))
		dev_kfree_skb_any(skb);

	IWL_DEBUG_MAC80211("leave\n");
	return 0;
}

static int iwl_mac_add_interface(struct ieee80211_hw *hw,
				 struct ieee80211_if_init_conf *conf)
{
	struct iwl_priv *priv = hw->priv;
	unsigned long flags;
	DECLARE_MAC_BUF(mac);

	IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
	if (conf->mac_addr)
		IWL_DEBUG_MAC80211("enter: MAC %s\n",
				   print_mac(mac, conf->mac_addr));

	if (priv->interface_id) {
		IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
		return 0;
	}

	spin_lock_irqsave(&priv->lock, flags);
	priv->interface_id = conf->if_id;

	spin_unlock_irqrestore(&priv->lock, flags);

	mutex_lock(&priv->mutex);
	iwl_set_mode(priv, conf->type);

	IWL_DEBUG_MAC80211("leave\n");
	mutex_unlock(&priv->mutex);

	return 0;
}

/**
 * iwl_mac_config - mac80211 config callback
 *
 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
 * be set inappropriately and the driver currently sets the hardware up to
 * use it whenever needed.
 */
static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
{
	struct iwl_priv *priv = hw->priv;
	const struct iwl_channel_info *ch_info;
	unsigned long flags;

	mutex_lock(&priv->mutex);
	IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);

	if (!iwl_is_ready(priv)) {
		IWL_DEBUG_MAC80211("leave - not ready\n");
		mutex_unlock(&priv->mutex);
		return -EIO;
	}

	/* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
	 * what is exposed through include/ declrations */
	if (unlikely(!iwl_param_disable_hw_scan &&
		     test_bit(STATUS_SCANNING, &priv->status))) {
		IWL_DEBUG_MAC80211("leave - scanning\n");
		mutex_unlock(&priv->mutex);
		return 0;
	}

	spin_lock_irqsave(&priv->lock, flags);

	ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
	if (!is_channel_valid(ch_info)) {
		IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
			       conf->channel, conf->phymode);
		IWL_DEBUG_MAC80211("leave - invalid channel\n");
		spin_unlock_irqrestore(&priv->lock, flags);
		mutex_unlock(&priv->mutex);
		return -EINVAL;
	}

	iwl_set_rxon_channel(priv, conf->phymode, conf->channel);

	iwl_set_flags_for_phymode(priv, conf->phymode);

	/* The list of supported rates and rate mask can be different
	 * for each phymode; since the phymode may have changed, reset
	 * the rate mask to what mac80211 lists */
	iwl_set_rate(priv);

	spin_unlock_irqrestore(&priv->lock, flags);

#ifdef IEEE80211_CONF_CHANNEL_SWITCH
	if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
		iwl_hw_channel_switch(priv, conf->channel);
		mutex_unlock(&priv->mutex);
		return 0;
	}
#endif

	iwl_radio_kill_sw(priv, !conf->radio_enabled);

	if (!conf->radio_enabled) {
		IWL_DEBUG_MAC80211("leave - radio disabled\n");
		mutex_unlock(&priv->mutex);
		return 0;
	}

	if (iwl_is_rfkill(priv)) {
		IWL_DEBUG_MAC80211("leave - RF kill\n");
		mutex_unlock(&priv->mutex);
		return -EIO;
	}

	iwl_set_rate(priv);

	if (memcmp(&priv->active_rxon,
		   &priv->staging_rxon, sizeof(priv->staging_rxon)))
		iwl_commit_rxon(priv);
	else
		IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");

	IWL_DEBUG_MAC80211("leave\n");

	mutex_unlock(&priv->mutex);

	return 0;
}

static void iwl_config_ap(struct iwl_priv *priv)
{
	int rc = 0;

	if (priv->status & STATUS_EXIT_PENDING)
		return;

	/* The following should be done only at AP bring up */
	if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {

		/* RXON - unassoc (to set timing command) */
		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
		iwl_commit_rxon(priv);

		/* RXON Timing */
		memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
		iwl_setup_rxon_timing(priv);
		rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
				sizeof(priv->rxon_timing), &priv->rxon_timing);
		if (rc)
			IWL_WARNING("REPLY_RXON_TIMING failed - "
					"Attempting to continue.\n");

		/* FIXME: what should be the assoc_id for AP? */
		priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
		if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
			priv->staging_rxon.flags |=
				RXON_FLG_SHORT_PREAMBLE_MSK;
		else
			priv->staging_rxon.flags &=
				~RXON_FLG_SHORT_PREAMBLE_MSK;

		if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
			if (priv->assoc_capability &
				WLAN_CAPABILITY_SHORT_SLOT_TIME)
				priv->staging_rxon.flags |=
					RXON_FLG_SHORT_SLOT_MSK;
			else
				priv->staging_rxon.flags &=
					~RXON_FLG_SHORT_SLOT_MSK;

			if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
				priv->staging_rxon.flags &=
					~RXON_FLG_SHORT_SLOT_MSK;
		}
		/* restore RXON assoc */
		priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
		iwl_commit_rxon(priv);
		iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
	}
	iwl_send_beacon_cmd(priv);

	/* FIXME - we need to add code here to detect a totally new
	 * configuration, reset the AP, unassoc, rxon timing, assoc,
	 * clear sta table, add BCAST sta... */
}

static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
				    struct ieee80211_if_conf *conf)
{
	struct iwl_priv *priv = hw->priv;
	DECLARE_MAC_BUF(mac);
	unsigned long flags;
	int rc;

	if (conf == NULL)
		return -EIO;

	/* XXX: this MUST use conf->mac_addr */

	if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
	    (!conf->beacon || !conf->ssid_len)) {
		IWL_DEBUG_MAC80211
		    ("Leaving in AP mode because HostAPD is not ready.\n");
		return 0;
	}

	mutex_lock(&priv->mutex);

	IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
	if (conf->bssid)
		IWL_DEBUG_MAC80211("bssid: %s\n",
				   print_mac(mac, conf->bssid));

/*
 * very dubious code was here; the probe filtering flag is never set:
 *
	if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
	    !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
 */
	if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
		IWL_DEBUG_MAC80211("leave - scanning\n");
		mutex_unlock(&priv->mutex);
		return 0;
	}

	if (priv->interface_id != if_id) {
		IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
		mutex_unlock(&priv->mutex);
		return 0;
	}

	if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
		if (!conf->bssid) {
			conf->bssid = priv->mac_addr;
			memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
			IWL_DEBUG_MAC80211("bssid was set to: %s\n",
					   print_mac(mac, conf->bssid));
		}
		if (priv->ibss_beacon)
			dev_kfree_skb(priv->ibss_beacon);

		priv->ibss_beacon = conf->beacon;
	}

	if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
	    !is_multicast_ether_addr(conf->bssid)) {
		/* If there is currently a HW scan going on in the background
		 * then we need to cancel it else the RXON below will fail. */
		if (iwl_scan_cancel_timeout(priv, 100)) {
			IWL_WARNING("Aborted scan still in progress "
				    "after 100ms\n");
			IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
			mutex_unlock(&priv->mutex);
			return -EAGAIN;
		}
		memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);

		/* TODO: Audit driver for usage of these members and see
		 * if mac80211 deprecates them (priv->bssid looks like it
		 * shouldn't be there, but I haven't scanned the IBSS code
		 * to verify) - jpk */
		memcpy(priv->bssid, conf->bssid, ETH_ALEN);

		if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
			iwl_config_ap(priv);
		else {
			rc = iwl_commit_rxon(priv);
			if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
				iwl_add_station(priv,
					priv->active_rxon.bssid_addr, 1, 0);
		}

	} else {
		iwl_scan_cancel_timeout(priv, 100);
		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
		iwl_commit_rxon(priv);
	}

	spin_lock_irqsave(&priv->lock, flags);
	if (!conf->ssid_len)
		memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
	else
		memcpy(priv->essid, conf->ssid, conf->ssid_len);

	priv->essid_len = conf->ssid_len;
	spin_unlock_irqrestore(&priv->lock, flags);

	IWL_DEBUG_MAC80211("leave\n");
	mutex_unlock(&priv->mutex);

	return 0;
}

static void iwl_configure_filter(struct ieee80211_hw *hw,
				 unsigned int changed_flags,
				 unsigned int *total_flags,
				 int mc_count, struct dev_addr_list *mc_list)
{
	/*
	 * XXX: dummy
	 * see also iwl_connection_init_rx_config
	 */
	*total_flags = 0;
}

static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
				     struct ieee80211_if_init_conf *conf)
{
	struct iwl_priv *priv = hw->priv;

	IWL_DEBUG_MAC80211("enter\n");

	mutex_lock(&priv->mutex);

	iwl_scan_cancel_timeout(priv, 100);
	cancel_delayed_work(&priv->post_associate);
	priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
	iwl_commit_rxon(priv);

	if (priv->interface_id == conf->if_id) {
		priv->interface_id = 0;
		memset(priv->bssid, 0, ETH_ALEN);
		memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
		priv->essid_len = 0;
	}
	mutex_unlock(&priv->mutex);

	IWL_DEBUG_MAC80211("leave\n");

}

#define IWL_DELAY_NEXT_SCAN (HZ*2)
static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
{
	int rc = 0;
	unsigned long flags;
	struct iwl_priv *priv = hw->priv;

	IWL_DEBUG_MAC80211("enter\n");

	mutex_lock(&priv->mutex);
	spin_lock_irqsave(&priv->lock, flags);

	if (!iwl_is_ready_rf(priv)) {
		rc = -EIO;
		IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
		goto out_unlock;
	}

	if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {	/* APs don't scan */
		rc = -EIO;
		IWL_ERROR("ERROR: APs don't scan\n");
		goto out_unlock;
	}

	/* if we just finished scan ask for delay */
	if (priv->last_scan_jiffies &&
	    time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
		       jiffies)) {
		rc = -EAGAIN;
		goto out_unlock;
	}
	if (len) {
		IWL_DEBUG_SCAN("direct scan for  "
			       "%s [%d]\n ",
			       iwl_escape_essid(ssid, len), (int)len);

		priv->one_direct_scan = 1;
		priv->direct_ssid_len = (u8)
		    min((u8) len, (u8) IW_ESSID_MAX_SIZE);
		memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
	} else
		priv->one_direct_scan = 0;

	rc = iwl_scan_initiate(priv);

	IWL_DEBUG_MAC80211("leave\n");

out_unlock:
	spin_unlock_irqrestore(&priv->lock, flags);
	mutex_unlock(&priv->mutex);

	return rc;
}

static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
			   const u8 *local_addr, const u8 *addr,
			   struct ieee80211_key_conf *key)
{
	struct iwl_priv *priv = hw->priv;
	int rc = 0;
	u8 sta_id;

	IWL_DEBUG_MAC80211("enter\n");

	if (!iwl_param_hwcrypto) {
		IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
		return -EOPNOTSUPP;
	}

	if (is_zero_ether_addr(addr))
		/* only support pairwise keys */
		return -EOPNOTSUPP;

	sta_id = iwl_hw_find_station(priv, addr);
	if (sta_id == IWL_INVALID_STATION) {
		DECLARE_MAC_BUF(mac);

		IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
				   print_mac(mac, addr));
		return -EINVAL;
	}

	mutex_lock(&priv->mutex);

	iwl_scan_cancel_timeout(priv, 100);

	switch (cmd) {
	case  SET_KEY:
		rc = iwl_update_sta_key_info(priv, key, sta_id);
		if (!rc) {
			iwl_set_rxon_hwcrypto(priv, 1);
			iwl_commit_rxon(priv);
			key->hw_key_idx = sta_id;
			IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
			key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
		}
		break;
	case DISABLE_KEY:
		rc = iwl_clear_sta_key_info(priv, sta_id);
		if (!rc) {
			iwl_set_rxon_hwcrypto(priv, 0);
			iwl_commit_rxon(priv);
			IWL_DEBUG_MAC80211("disable hwcrypto key\n");
		}
		break;
	default:
		rc = -EINVAL;
	}

	IWL_DEBUG_MAC80211("leave\n");
	mutex_unlock(&priv->mutex);

	return rc;
}

static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
			   const struct ieee80211_tx_queue_params *params)
{
	struct iwl_priv *priv = hw->priv;
#ifdef CONFIG_IWLWIFI_QOS
	unsigned long flags;
	int q;
#endif /* CONFIG_IWL_QOS */

	IWL_DEBUG_MAC80211("enter\n");

	if (!iwl_is_ready_rf(priv)) {
		IWL_DEBUG_MAC80211("leave - RF not ready\n");
		return -EIO;
	}

	if (queue >= AC_NUM) {
		IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
		return 0;
	}

#ifdef CONFIG_IWLWIFI_QOS
	if (!priv->qos_data.qos_enable) {
		priv->qos_data.qos_active = 0;
		IWL_DEBUG_MAC80211("leave - qos not enabled\n");
		return 0;
	}
	q = AC_NUM - 1 - queue;

	spin_lock_irqsave(&priv->lock, flags);

	priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
	priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
	priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
	priv->qos_data.def_qos_parm.ac[q].edca_txop =
			cpu_to_le16((params->burst_time * 100));

	priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
	priv->qos_data.qos_active = 1;

	spin_unlock_irqrestore(&priv->lock, flags);

	mutex_lock(&priv->mutex);
	if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
		iwl_activate_qos(priv, 1);
	else if (priv->assoc_id && iwl_is_associated(priv))
		iwl_activate_qos(priv, 0);

	mutex_unlock(&priv->mutex);

#endif /*CONFIG_IWLWIFI_QOS */

	IWL_DEBUG_MAC80211("leave\n");
	return 0;
}

static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
				struct ieee80211_tx_queue_stats *stats)
{
	struct iwl_priv *priv = hw->priv;
	int i, avail;
	struct iwl_tx_queue *txq;
	struct iwl_queue *q;
	unsigned long flags;

	IWL_DEBUG_MAC80211("enter\n");

	if (!iwl_is_ready_rf(priv)) {
		IWL_DEBUG_MAC80211("leave - RF not ready\n");
		return -EIO;
	}

	spin_lock_irqsave(&priv->lock, flags);

	for (i = 0; i < AC_NUM; i++) {
		txq = &priv->txq[i];
		q = &txq->q;
		avail = iwl_queue_space(q);

		stats->data[i].len = q->n_window - avail;
		stats->data[i].limit = q->n_window - q->high_mark;
		stats->data[i].count = q->n_window;

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

	IWL_DEBUG_MAC80211("leave\n");

	return 0;
}

static int iwl_mac_get_stats(struct ieee80211_hw *hw,
			     struct ieee80211_low_level_stats *stats)
{
	IWL_DEBUG_MAC80211("enter\n");
	IWL_DEBUG_MAC80211("leave\n");

	return 0;
}

static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
{
	IWL_DEBUG_MAC80211("enter\n");
	IWL_DEBUG_MAC80211("leave\n");

	return 0;
}

static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
{
	struct iwl_priv *priv = hw->priv;
	unsigned long flags;

	mutex_lock(&priv->mutex);
	IWL_DEBUG_MAC80211("enter\n");

#ifdef CONFIG_IWLWIFI_QOS
	iwl_reset_qos(priv);
#endif
	cancel_delayed_work(&priv->post_associate);

	spin_lock_irqsave(&priv->lock, flags);
	priv->assoc_id = 0;
	priv->assoc_capability = 0;
	priv->call_post_assoc_from_beacon = 0;

	/* new association get rid of ibss beacon skb */
	if (priv->ibss_beacon)
		dev_kfree_skb(priv->ibss_beacon);

	priv->ibss_beacon = NULL;

	priv->beacon_int = priv->hw->conf.beacon_int;
	priv->timestamp1 = 0;
	priv->timestamp0 = 0;
	if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
		priv->beacon_int = 0;

	spin_unlock_irqrestore(&priv->lock, flags);

	/* we are restarting association process
	 * clear RXON_FILTER_ASSOC_MSK bit
	*/
	if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
		iwl_scan_cancel_timeout(priv, 100);
		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
		iwl_commit_rxon(priv);
	}

	/* Per mac80211.h: This is only used in IBSS mode... */
	if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {

		IWL_DEBUG_MAC80211("leave - not in IBSS\n");
		mutex_unlock(&priv->mutex);
		return;
	}

	if (!iwl_is_ready_rf(priv)) {
		IWL_DEBUG_MAC80211("leave - not ready\n");
		mutex_unlock(&priv->mutex);
		return;
	}

	priv->only_active_channel = 0;

	iwl_set_rate(priv);

	mutex_unlock(&priv->mutex);

	IWL_DEBUG_MAC80211("leave\n");

}

static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
				 struct ieee80211_tx_control *control)
{
	struct iwl_priv *priv = hw->priv;
	unsigned long flags;

	mutex_lock(&priv->mutex);
	IWL_DEBUG_MAC80211("enter\n");

	if (!iwl_is_ready_rf(priv)) {
		IWL_DEBUG_MAC80211("leave - RF not ready\n");
		mutex_unlock(&priv->mutex);
		return -EIO;
	}

	if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
		IWL_DEBUG_MAC80211("leave - not IBSS\n");
		mutex_unlock(&priv->mutex);
		return -EIO;
	}

	spin_lock_irqsave(&priv->lock, flags);

	if (priv->ibss_beacon)
		dev_kfree_skb(priv->ibss_beacon);

	priv->ibss_beacon = skb;

	priv->assoc_id = 0;

	IWL_DEBUG_MAC80211("leave\n");
	spin_unlock_irqrestore(&priv->lock, flags);

#ifdef CONFIG_IWLWIFI_QOS
	iwl_reset_qos(priv);
#endif

	queue_work(priv->workqueue, &priv->post_associate.work);

	mutex_unlock(&priv->mutex);

	return 0;
}

/*****************************************************************************
 *
 * sysfs attributes
 *
 *****************************************************************************/

#ifdef CONFIG_IWLWIFI_DEBUG

/*
 * The following adds a new attribute to the sysfs representation
 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
 * used for controlling the debug level.
 *
 * See the level definitions in iwl for details.
 */

static ssize_t show_debug_level(struct device_driver *d, char *buf)
{
	return sprintf(buf, "0x%08X\n", iwl_debug_level);
}
static ssize_t store_debug_level(struct device_driver *d,
				 const char *buf, size_t count)
{
	char *p = (char *)buf;
	u32 val;

	val = simple_strtoul(p, &p, 0);
	if (p == buf)
		printk(KERN_INFO DRV_NAME
		       ": %s is not in hex or decimal form.\n", buf);
	else
		iwl_debug_level = val;

	return strnlen(buf, count);
}

static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
		   show_debug_level, store_debug_level);

#endif /* CONFIG_IWLWIFI_DEBUG */

static ssize_t show_rf_kill(struct device *d,
			    struct device_attribute *attr, char *buf)
{
	/*
	 * 0 - RF kill not enabled
	 * 1 - SW based RF kill active (sysfs)
	 * 2 - HW based RF kill active
	 * 3 - Both HW and SW based RF kill active
	 */
	struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
	int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
		  (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);

	return sprintf(buf, "%i\n", val);
}

static ssize_t store_rf_kill(struct device *d,
			     struct device_attribute *attr,
			     const char *buf, size_t count)
{
	struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;

	mutex_lock(&priv->mutex);
	iwl_radio_kill_sw(priv, buf[0] == '1');
	mutex_unlock(&priv->mutex);

	return count;
}

static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);

static ssize_t show_temperature(struct device *d,
				struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;

	if (!iwl_is_alive(priv))
		return -EAGAIN;

	return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
}

static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);

static ssize_t show_rs_window(struct device *d,
			      struct device_attribute *attr,
			      char *buf)
{
	struct iwl_priv *priv = d->driver_data;
	return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
}
static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);

static ssize_t show_tx_power(struct device *d,
			     struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
	return sprintf(buf, "%d\n", priv->user_txpower_limit);
}

static ssize_t store_tx_power(struct device *d,
			      struct device_attribute *attr,
			      const char *buf, size_t count)
{
	struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
	char *p = (char *)buf;
	u32 val;

	val = simple_strtoul(p, &p, 10);
	if (p == buf)
		printk(KERN_INFO DRV_NAME
		       ": %s is not in decimal form.\n", buf);
	else
		iwl_hw_reg_set_txpower(priv, val);

	return count;
}

static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);

static ssize_t show_flags(struct device *d,
			  struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;

	return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
}

static ssize_t store_flags(struct device *d,
			   struct device_attribute *attr,
			   const char *buf, size_t count)
{
	struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
	u32 flags = simple_strtoul(buf, NULL, 0);

	mutex_lock(&priv->mutex);
	if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
		/* Cancel any currently running scans... */
		if (iwl_scan_cancel_timeout(priv, 100))
			IWL_WARNING("Could not cancel scan.\n");
		else {
			IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
				       flags);
			priv->staging_rxon.flags = cpu_to_le32(flags);
			iwl_commit_rxon(priv);
		}
	}
	mutex_unlock(&priv->mutex);

	return count;
}

static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);

static ssize_t show_filter_flags(struct device *d,
				 struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;

	return sprintf(buf, "0x%04X\n",
		le32_to_cpu(priv->active_rxon.filter_flags));
}

static ssize_t store_filter_flags(struct device *d,
				  struct device_attribute *attr,
				  const char *buf, size_t count)
{
	struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
	u32 filter_flags = simple_strtoul(buf, NULL, 0);

	mutex_lock(&priv->mutex);
	if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
		/* Cancel any currently running scans... */
		if (iwl_scan_cancel_timeout(priv, 100))
			IWL_WARNING("Could not cancel scan.\n");
		else {
			IWL_DEBUG_INFO("Committing rxon.filter_flags = "
				       "0x%04X\n", filter_flags);
			priv->staging_rxon.filter_flags =
				cpu_to_le32(filter_flags);
			iwl_commit_rxon(priv);
		}
	}
	mutex_unlock(&priv->mutex);

	return count;
}

static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
		   store_filter_flags);

static ssize_t show_tune(struct device *d,
			 struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;

	return sprintf(buf, "0x%04X\n",
		       (priv->phymode << 8) |
			le16_to_cpu(priv->active_rxon.channel));
}

static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);

static ssize_t store_tune(struct device *d,
			  struct device_attribute *attr,
			  const char *buf, size_t count)
{
	struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
	char *p = (char *)buf;
	u16 tune = simple_strtoul(p, &p, 0);
	u8 phymode = (tune >> 8) & 0xff;
	u16 channel = tune & 0xff;

	IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);

	mutex_lock(&priv->mutex);
	if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
	    (priv->phymode != phymode)) {
		const struct iwl_channel_info *ch_info;

		ch_info = iwl_get_channel_info(priv, phymode, channel);
		if (!ch_info) {
			IWL_WARNING("Requested invalid phymode/channel "
				    "combination: %d %d\n", phymode, channel);
			mutex_unlock(&priv->mutex);
			return -EINVAL;
		}

		/* Cancel any currently running scans... */
		if (iwl_scan_cancel_timeout(priv, 100))
			IWL_WARNING("Could not cancel scan.\n");
		else {
			IWL_DEBUG_INFO("Committing phymode and "
				       "rxon.channel = %d %d\n",
				       phymode, channel);

			iwl_set_rxon_channel(priv, phymode, channel);
			iwl_set_flags_for_phymode(priv, phymode);

			iwl_set_rate(priv);
			iwl_commit_rxon(priv);
		}
	}
	mutex_unlock(&priv->mutex);

	return count;
}

static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);

#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT

static ssize_t show_measurement(struct device *d,
				struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = dev_get_drvdata(d);
	struct iwl_spectrum_notification measure_report;
	u32 size = sizeof(measure_report), len = 0, ofs = 0;
	u8 *data = (u8 *) & measure_report;
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);
	if (!(priv->measurement_status & MEASUREMENT_READY)) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return 0;
	}
	memcpy(&measure_report, &priv->measure_report, size);
	priv->measurement_status = 0;
	spin_unlock_irqrestore(&priv->lock, flags);

	while (size && (PAGE_SIZE - len)) {
		hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
				   PAGE_SIZE - len, 1);
		len = strlen(buf);
		if (PAGE_SIZE - len)
			buf[len++] = '\n';

		ofs += 16;
		size -= min(size, 16U);
	}

	return len;
}

static ssize_t store_measurement(struct device *d,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
	struct iwl_priv *priv = dev_get_drvdata(d);
	struct ieee80211_measurement_params params = {
		.channel = le16_to_cpu(priv->active_rxon.channel),
		.start_time = cpu_to_le64(priv->last_tsf),
		.duration = cpu_to_le16(1),
	};
	u8 type = IWL_MEASURE_BASIC;
	u8 buffer[32];
	u8 channel;

	if (count) {
		char *p = buffer;
		strncpy(buffer, buf, min(sizeof(buffer), count));
		channel = simple_strtoul(p, NULL, 0);
		if (channel)
			params.channel = channel;

		p = buffer;
		while (*p && *p != ' ')
			p++;
		if (*p)
			type = simple_strtoul(p + 1, NULL, 0);
	}

	IWL_DEBUG_INFO("Invoking measurement of type %d on "
		       "channel %d (for '%s')\n", type, params.channel, buf);
	iwl_get_measurement(priv, &params, type);

	return count;
}

static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
		   show_measurement, store_measurement);
#endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */

static ssize_t show_rate(struct device *d,
			 struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = dev_get_drvdata(d);
	unsigned long flags;
	int i;

	spin_lock_irqsave(&priv->sta_lock, flags);
	if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
		i = priv->stations[IWL_AP_ID].current_rate.s.rate;
	else
		i = priv->stations[IWL_STA_ID].current_rate.s.rate;
	spin_unlock_irqrestore(&priv->sta_lock, flags);

	i = iwl_rate_index_from_plcp(i);
	if (i == -1)
		return sprintf(buf, "0\n");

	return sprintf(buf, "%d%s\n",
		       (iwl_rates[i].ieee >> 1),
		       (iwl_rates[i].ieee & 0x1) ? ".5" : "");
}

static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);

static ssize_t store_retry_rate(struct device *d,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct iwl_priv *priv = dev_get_drvdata(d);

	priv->retry_rate = simple_strtoul(buf, NULL, 0);
	if (priv->retry_rate <= 0)
		priv->retry_rate = 1;

	return count;
}

static ssize_t show_retry_rate(struct device *d,
			       struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = dev_get_drvdata(d);
	return sprintf(buf, "%d", priv->retry_rate);
}

static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
		   store_retry_rate);

static ssize_t store_power_level(struct device *d,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
	struct iwl_priv *priv = dev_get_drvdata(d);
	int rc;
	int mode;

	mode = simple_strtoul(buf, NULL, 0);
	mutex_lock(&priv->mutex);

	if (!iwl_is_ready(priv)) {
		rc = -EAGAIN;
		goto out;
	}

	if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
		mode = IWL_POWER_AC;
	else
		mode |= IWL_POWER_ENABLED;

	if (mode != priv->power_mode) {
		rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
		if (rc) {
			IWL_DEBUG_MAC80211("failed setting power mode.\n");
			goto out;
		}
		priv->power_mode = mode;
	}

	rc = count;

 out:
	mutex_unlock(&priv->mutex);
	return rc;
}

#define MAX_WX_STRING 80

/* Values are in microsecond */
static const s32 timeout_duration[] = {
	350000,
	250000,
	75000,
	37000,
	25000,
};
static const s32 period_duration[] = {
	400000,
	700000,
	1000000,
	1000000,
	1000000
};

static ssize_t show_power_level(struct device *d,
				struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = dev_get_drvdata(d);
	int level = IWL_POWER_LEVEL(priv->power_mode);
	char *p = buf;

	p += sprintf(p, "%d ", level);
	switch (level) {
	case IWL_POWER_MODE_CAM:
	case IWL_POWER_AC:
		p += sprintf(p, "(AC)");
		break;
	case IWL_POWER_BATTERY:
		p += sprintf(p, "(BATTERY)");
		break;
	default:
		p += sprintf(p,
			     "(Timeout %dms, Period %dms)",
			     timeout_duration[level - 1] / 1000,
			     period_duration[level - 1] / 1000);
	}

	if (!(priv->power_mode & IWL_POWER_ENABLED))
		p += sprintf(p, " OFF\n");
	else
		p += sprintf(p, " \n");

	return (p - buf + 1);

}

static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
		   store_power_level);

static ssize_t show_channels(struct device *d,
			     struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = dev_get_drvdata(d);
	int len = 0, i;
	struct ieee80211_channel *channels = NULL;
	const struct ieee80211_hw_mode *hw_mode = NULL;
	int count = 0;

	if (!iwl_is_ready(priv))
		return -EAGAIN;

	hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
	if (!hw_mode)
		hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
	if (hw_mode) {
		channels = hw_mode->channels;
		count = hw_mode->num_channels;
	}

	len +=
	    sprintf(&buf[len],
		    "Displaying %d channels in 2.4GHz band "
		    "(802.11bg):\n", count);

	for (i = 0; i < count; i++)
		len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
			       channels[i].chan,
			       channels[i].power_level,
			       channels[i].
			       flag & IEEE80211_CHAN_W_RADAR_DETECT ?
			       " (IEEE 802.11h required)" : "",
			       (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
				|| (channels[i].
				    flag &
				    IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
			       ", IBSS",
			       channels[i].
			       flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
			       "active/passive" : "passive only");

	hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
	if (hw_mode) {
		channels = hw_mode->channels;
		count = hw_mode->num_channels;
	} else {
		channels = NULL;
		count = 0;
	}

	len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
		       "(802.11a):\n", count);

	for (i = 0; i < count; i++)
		len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
			       channels[i].chan,
			       channels[i].power_level,
			       channels[i].
			       flag & IEEE80211_CHAN_W_RADAR_DETECT ?
			       " (IEEE 802.11h required)" : "",
			       (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
				|| (channels[i].
				    flag &
				    IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
			       ", IBSS",
			       channels[i].
			       flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
			       "active/passive" : "passive only");

	return len;
}

static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);

static ssize_t show_statistics(struct device *d,
			       struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = dev_get_drvdata(d);
	u32 size = sizeof(struct iwl_notif_statistics);
	u32 len = 0, ofs = 0;
	u8 *data = (u8 *) & priv->statistics;
	int rc = 0;

	if (!iwl_is_alive(priv))
		return -EAGAIN;

	mutex_lock(&priv->mutex);
	rc = iwl_send_statistics_request(priv);
	mutex_unlock(&priv->mutex);

	if (rc) {
		len = sprintf(buf,
			      "Error sending statistics request: 0x%08X\n", rc);
		return len;
	}

	while (size && (PAGE_SIZE - len)) {
		hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
				   PAGE_SIZE - len, 1);
		len = strlen(buf);
		if (PAGE_SIZE - len)
			buf[len++] = '\n';

		ofs += 16;
		size -= min(size, 16U);
	}

	return len;
}

static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);

static ssize_t show_antenna(struct device *d,
			    struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = dev_get_drvdata(d);

	if (!iwl_is_alive(priv))
		return -EAGAIN;

	return sprintf(buf, "%d\n", priv->antenna);
}

static ssize_t store_antenna(struct device *d,
			     struct device_attribute *attr,
			     const char *buf, size_t count)
{
	int ant;
	struct iwl_priv *priv = dev_get_drvdata(d);

	if (count == 0)
		return 0;

	if (sscanf(buf, "%1i", &ant) != 1) {
		IWL_DEBUG_INFO("not in hex or decimal form.\n");
		return count;
	}

	if ((ant >= 0) && (ant <= 2)) {
		IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
		priv->antenna = (enum iwl_antenna)ant;
	} else
		IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);


	return count;
}

static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);

static ssize_t show_status(struct device *d,
			   struct device_attribute *attr, char *buf)
{
	struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
	if (!iwl_is_alive(priv))
		return -EAGAIN;
	return sprintf(buf, "0x%08x\n", (int)priv->status);
}

static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);

static ssize_t dump_error_log(struct device *d,
			      struct device_attribute *attr,
			      const char *buf, size_t count)
{
	char *p = (char *)buf;

	if (p[0] == '1')
		iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);

	return strnlen(buf, count);
}

static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);

static ssize_t dump_event_log(struct device *d,
			      struct device_attribute *attr,
			      const char *buf, size_t count)
{
	char *p = (char *)buf;

	if (p[0] == '1')
		iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);

	return strnlen(buf, count);
}

static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);

/*****************************************************************************
 *
 * driver setup and teardown
 *
 *****************************************************************************/

static void iwl_setup_deferred_work(struct iwl_priv *priv)
{
	priv->workqueue = create_workqueue(DRV_NAME);

	init_waitqueue_head(&priv->wait_command_queue);

	INIT_WORK(&priv->up, iwl_bg_up);
	INIT_WORK(&priv->restart, iwl_bg_restart);
	INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
	INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
	INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
	INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
	INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
	INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
	INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
	INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
	INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
	INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);

	iwl_hw_setup_deferred_work(priv);

	tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
		     iwl_irq_tasklet, (unsigned long)priv);
}

static void iwl_cancel_deferred_work(struct iwl_priv *priv)
{
	iwl_hw_cancel_deferred_work(priv);

	cancel_delayed_work(&priv->scan_check);
	cancel_delayed_work(&priv->alive_start);
	cancel_delayed_work(&priv->post_associate);
	cancel_work_sync(&priv->beacon_update);
}

static struct attribute *iwl_sysfs_entries[] = {
	&dev_attr_antenna.attr,
	&dev_attr_channels.attr,
	&dev_attr_dump_errors.attr,
	&dev_attr_dump_events.attr,
	&dev_attr_flags.attr,
	&dev_attr_filter_flags.attr,
#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
	&dev_attr_measurement.attr,
#endif
	&dev_attr_power_level.attr,
	&dev_attr_rate.attr,
	&dev_attr_retry_rate.attr,
	&dev_attr_rf_kill.attr,
	&dev_attr_rs_window.attr,
	&dev_attr_statistics.attr,
	&dev_attr_status.attr,
	&dev_attr_temperature.attr,
	&dev_attr_tune.attr,
	&dev_attr_tx_power.attr,

	NULL
};

static struct attribute_group iwl_attribute_group = {
	.name = NULL,		/* put in device directory */
	.attrs = iwl_sysfs_entries,
};

static struct ieee80211_ops iwl_hw_ops = {
	.tx = iwl_mac_tx,
	.start = iwl_mac_start,
	.stop = iwl_mac_stop,
	.add_interface = iwl_mac_add_interface,
	.remove_interface = iwl_mac_remove_interface,
	.config = iwl_mac_config,
	.config_interface = iwl_mac_config_interface,
	.configure_filter = iwl_configure_filter,
	.set_key = iwl_mac_set_key,
	.get_stats = iwl_mac_get_stats,
	.get_tx_stats = iwl_mac_get_tx_stats,
	.conf_tx = iwl_mac_conf_tx,
	.get_tsf = iwl_mac_get_tsf,
	.reset_tsf = iwl_mac_reset_tsf,
	.beacon_update = iwl_mac_beacon_update,
	.hw_scan = iwl_mac_hw_scan
};

static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	int err = 0;
	u32 pci_id;
	struct iwl_priv *priv;
	struct ieee80211_hw *hw;
	int i;

	if (iwl_param_disable_hw_scan) {
		IWL_DEBUG_INFO("Disabling hw_scan\n");
		iwl_hw_ops.hw_scan = NULL;
	}

	if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
	    (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
		IWL_ERROR("invalid queues_num, should be between %d and %d\n",
			  IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
		err = -EINVAL;
		goto out;
	}

	/* mac80211 allocates memory for this device instance, including
	 *   space for this driver's private structure */
	hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
	if (hw == NULL) {
		IWL_ERROR("Can not allocate network device\n");
		err = -ENOMEM;
		goto out;
	}
	SET_IEEE80211_DEV(hw, &pdev->dev);

	hw->rate_control_algorithm = "iwl-3945-rs";

	IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
	priv = hw->priv;
	priv->hw = hw;

	priv->pci_dev = pdev;
	priv->antenna = (enum iwl_antenna)iwl_param_antenna;
#ifdef CONFIG_IWLWIFI_DEBUG
	iwl_debug_level = iwl_param_debug;
	atomic_set(&priv->restrict_refcnt, 0);
#endif
	priv->retry_rate = 1;

	priv->ibss_beacon = NULL;

	/* Tell mac80211 and its clients (e.g. Wireless Extensions)
	 *   the range of signal quality values that we'll provide.
	 * Negative values for level/noise indicate that we'll provide dBm.
	 * For WE, at least, non-0 values here *enable* display of values
	 *   in app (iwconfig). */
	hw->max_rssi = -20;	/* signal level, negative indicates dBm */
	hw->max_noise = -20;	/* noise level, negative indicates dBm */
	hw->max_signal = 100;	/* link quality indication (%) */

	/* Tell mac80211 our Tx characteristics */
	hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;

	hw->queues = 4;

	spin_lock_init(&priv->lock);
	spin_lock_init(&priv->power_data.lock);
	spin_lock_init(&priv->sta_lock);
	spin_lock_init(&priv->hcmd_lock);

	for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
		INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);

	INIT_LIST_HEAD(&priv->free_frames);

	mutex_init(&priv->mutex);
	if (pci_enable_device(pdev)) {
		err = -ENODEV;
		goto out_ieee80211_free_hw;
	}

	pci_set_master(pdev);

	iwl_clear_stations_table(priv);

	priv->data_retry_limit = -1;
	priv->ieee_channels = NULL;
	priv->ieee_rates = NULL;
	priv->phymode = -1;

	err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
	if (!err)
		err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
	if (err) {
		printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
		goto out_pci_disable_device;
	}

	pci_set_drvdata(pdev, priv);
	err = pci_request_regions(pdev, DRV_NAME);
	if (err)
		goto out_pci_disable_device;
	/* We disable the RETRY_TIMEOUT register (0x41) to keep
	 * PCI Tx retries from interfering with C3 CPU state */
	pci_write_config_byte(pdev, 0x41, 0x00);
	priv->hw_base = pci_iomap(pdev, 0, 0);
	if (!priv->hw_base) {
		err = -ENODEV;
		goto out_pci_release_regions;
	}

	IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
			(unsigned long long) pci_resource_len(pdev, 0));
	IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);

	/* Initialize module parameter values here */

	if (iwl_param_disable) {
		set_bit(STATUS_RF_KILL_SW, &priv->status);
		IWL_DEBUG_INFO("Radio disabled.\n");
	}

	priv->iw_mode = IEEE80211_IF_TYPE_STA;

	pci_id =
	    (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;

	switch (pci_id) {
	case 0x42221005:	/* 0x4222 0x8086 0x1005 is BG SKU */
	case 0x42221034:	/* 0x4222 0x8086 0x1034 is BG SKU */
	case 0x42271014:	/* 0x4227 0x8086 0x1014 is BG SKU */
	case 0x42221044:	/* 0x4222 0x8086 0x1044 is BG SKU */
		priv->is_abg = 0;
		break;

	/*
	 * Rest are assumed ABG SKU -- if this is not the
	 * case then the card will get the wrong 'Detected'
	 * line in the kernel log however the code that
	 * initializes the GEO table will detect no A-band
	 * channels and remove the is_abg mask.
	 */
	default:
		priv->is_abg = 1;
		break;
	}

	printk(KERN_INFO DRV_NAME
	       ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
	       priv->is_abg ? "A" : "");

	/* Device-specific setup */
	if (iwl_hw_set_hw_setting(priv)) {
		IWL_ERROR("failed to set hw settings\n");
		mutex_unlock(&priv->mutex);
		goto out_iounmap;
	}

#ifdef CONFIG_IWLWIFI_QOS
	if (iwl_param_qos_enable)
		priv->qos_data.qos_enable = 1;

	iwl_reset_qos(priv);

	priv->qos_data.qos_active = 0;
	priv->qos_data.qos_cap.val = 0;
#endif /* CONFIG_IWLWIFI_QOS */

	iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
	iwl_setup_deferred_work(priv);
	iwl_setup_rx_handlers(priv);

	priv->rates_mask = IWL_RATES_MASK;
	/* If power management is turned on, default to AC mode */
	priv->power_mode = IWL_POWER_AC;
	priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;

	pci_enable_msi(pdev);

	err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
	if (err) {
		IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
		goto out_disable_msi;
	}

	mutex_lock(&priv->mutex);

	err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
	if (err) {
		IWL_ERROR("failed to create sysfs device attributes\n");
		mutex_unlock(&priv->mutex);
		goto out_release_irq;
	}

	/* fetch ucode file from disk, alloc and copy to bus-master buffers ...
	 * ucode filename and max sizes are card-specific. */
	err = iwl_read_ucode(priv);
	if (err) {
		IWL_ERROR("Could not read microcode: %d\n", err);
		mutex_unlock(&priv->mutex);
		goto out_pci_alloc;
	}

	mutex_unlock(&priv->mutex);

	IWL_DEBUG_INFO("Queing UP work.\n");

	queue_work(priv->workqueue, &priv->up);

	return 0;

 out_pci_alloc:
	iwl_dealloc_ucode_pci(priv);

	sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);

 out_release_irq:
	free_irq(pdev->irq, priv);

 out_disable_msi:
	pci_disable_msi(pdev);
	destroy_workqueue(priv->workqueue);
	priv->workqueue = NULL;
	iwl_unset_hw_setting(priv);

 out_iounmap:
	pci_iounmap(pdev, priv->hw_base);
 out_pci_release_regions:
	pci_release_regions(pdev);
 out_pci_disable_device:
	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);
 out_ieee80211_free_hw:
	ieee80211_free_hw(priv->hw);
 out:
	return err;
}

static void iwl_pci_remove(struct pci_dev *pdev)
{
	struct iwl_priv *priv = pci_get_drvdata(pdev);
	struct list_head *p, *q;
	int i;

	if (!priv)
		return;

	IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");

	mutex_lock(&priv->mutex);
	set_bit(STATUS_EXIT_PENDING, &priv->status);
	__iwl_down(priv);
	mutex_unlock(&priv->mutex);

	/* Free MAC hash list for ADHOC */
	for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
		list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
			list_del(p);
			kfree(list_entry(p, struct iwl_ibss_seq, list));
		}
	}

	sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);

	iwl_dealloc_ucode_pci(priv);

	if (priv->rxq.bd)
		iwl_rx_queue_free(priv, &priv->rxq);
	iwl_hw_txq_ctx_free(priv);

	iwl_unset_hw_setting(priv);
	iwl_clear_stations_table(priv);

	if (priv->mac80211_registered) {
		ieee80211_unregister_hw(priv->hw);
		iwl_rate_control_unregister(priv->hw);
	}

	/*netif_stop_queue(dev); */
	flush_workqueue(priv->workqueue);

	/* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
	 * priv->workqueue... so we can't take down the workqueue
	 * until now... */
	destroy_workqueue(priv->workqueue);
	priv->workqueue = NULL;

	free_irq(pdev->irq, priv);
	pci_disable_msi(pdev);
	pci_iounmap(pdev, priv->hw_base);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);

	kfree(priv->channel_info);

	kfree(priv->ieee_channels);
	kfree(priv->ieee_rates);

	if (priv->ibss_beacon)
		dev_kfree_skb(priv->ibss_beacon);

	ieee80211_free_hw(priv->hw);
}

#ifdef CONFIG_PM

static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct iwl_priv *priv = pci_get_drvdata(pdev);

	mutex_lock(&priv->mutex);

	set_bit(STATUS_IN_SUSPEND, &priv->status);

	/* Take down the device; powers it off, etc. */
	__iwl_down(priv);

	if (priv->mac80211_registered)
		ieee80211_stop_queues(priv->hw);

	pci_save_state(pdev);
	pci_disable_device(pdev);
	pci_set_power_state(pdev, PCI_D3hot);

	mutex_unlock(&priv->mutex);

	return 0;
}

static void iwl_resume(struct iwl_priv *priv)
{
	unsigned long flags;

	/* The following it a temporary work around due to the
	 * suspend / resume not fully initializing the NIC correctly.
	 * Without all of the following, resume will not attempt to take
	 * down the NIC (it shouldn't really need to) and will just try
	 * and bring the NIC back up.  However that fails during the
	 * ucode verification process.  This then causes iwl_down to be
	 * called *after* iwl_hw_nic_init() has succeeded -- which
	 * then lets the next init sequence succeed.  So, we've
	 * replicated all of that NIC init code here... */

	iwl_write32(priv, CSR_INT, 0xFFFFFFFF);

	iwl_hw_nic_init(priv);

	iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
	iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
		    CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
	iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
	iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
	iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);

	/* tell the device to stop sending interrupts */
	iwl_disable_interrupts(priv);

	spin_lock_irqsave(&priv->lock, flags);
	iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);

	if (!iwl_grab_restricted_access(priv)) {
		iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
					 APMG_CLK_VAL_DMA_CLK_RQT);
		iwl_release_restricted_access(priv);
	}
	spin_unlock_irqrestore(&priv->lock, flags);

	udelay(5);

	iwl_hw_nic_reset(priv);

	/* Bring the device back up */
	clear_bit(STATUS_IN_SUSPEND, &priv->status);
	queue_work(priv->workqueue, &priv->up);
}

static int iwl_pci_resume(struct pci_dev *pdev)
{
	struct iwl_priv *priv = pci_get_drvdata(pdev);
	int err;

	printk(KERN_INFO "Coming out of suspend...\n");

	mutex_lock(&priv->mutex);

	pci_set_power_state(pdev, PCI_D0);
	err = pci_enable_device(pdev);
	pci_restore_state(pdev);

	/*
	 * Suspend/Resume resets the PCI configuration space, so we have to
	 * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
	 * from interfering with C3 CPU state. pci_restore_state won't help
	 * here since it only restores the first 64 bytes pci config header.
	 */
	pci_write_config_byte(pdev, 0x41, 0x00);

	iwl_resume(priv);
	mutex_unlock(&priv->mutex);

	return 0;
}

#endif /* CONFIG_PM */

/*****************************************************************************
 *
 * driver and module entry point
 *
 *****************************************************************************/

static struct pci_driver iwl_driver = {
	.name = DRV_NAME,
	.id_table = iwl_hw_card_ids,
	.probe = iwl_pci_probe,
	.remove = __devexit_p(iwl_pci_remove),
#ifdef CONFIG_PM
	.suspend = iwl_pci_suspend,
	.resume = iwl_pci_resume,
#endif
};

static int __init iwl_init(void)
{

	int ret;
	printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
	printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
	ret = pci_register_driver(&iwl_driver);
	if (ret) {
		IWL_ERROR("Unable to initialize PCI module\n");
		return ret;
	}
#ifdef CONFIG_IWLWIFI_DEBUG
	ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
	if (ret) {
		IWL_ERROR("Unable to create driver sysfs file\n");
		pci_unregister_driver(&iwl_driver);
		return ret;
	}
#endif

	return ret;
}

static void __exit iwl_exit(void)
{
#ifdef CONFIG_IWLWIFI_DEBUG
	driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
#endif
	pci_unregister_driver(&iwl_driver);
}

module_param_named(antenna, iwl_param_antenna, int, 0444);
MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
module_param_named(disable, iwl_param_disable, int, 0444);
MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
MODULE_PARM_DESC(hwcrypto,
		 "using hardware crypto engine (default 0 [software])\n");
module_param_named(debug, iwl_param_debug, int, 0444);
MODULE_PARM_DESC(debug, "debug output mask");
module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");

module_param_named(queues_num, iwl_param_queues_num, int, 0444);
MODULE_PARM_DESC(queues_num, "number of hw queues.");

/* QoS */
module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");

module_exit(iwl_exit);
module_init(iwl_init);