summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/iwlwifi/iwl-3945.c
blob: 63f20370032dd0dd7480865e99f33293a25bbe6e (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
/******************************************************************************
 *
 * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
 *
 * 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
 *
 *****************************************************************************/

#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 <asm/unaligned.h>
#include <net/mac80211.h>

#include "iwl-3945-core.h"
#include "iwl-3945.h"
#include "iwl-helpers.h"
#include "iwl-3945-rs.h"

#define IWL_DECLARE_RATE_INFO(r, ip, in, rp, rn, pp, np)    \
	[IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,   \
				    IWL_RATE_##r##M_IEEE,   \
				    IWL_RATE_##ip##M_INDEX, \
				    IWL_RATE_##in##M_INDEX, \
				    IWL_RATE_##rp##M_INDEX, \
				    IWL_RATE_##rn##M_INDEX, \
				    IWL_RATE_##pp##M_INDEX, \
				    IWL_RATE_##np##M_INDEX, \
				    IWL_RATE_##r##M_INDEX_TABLE, \
				    IWL_RATE_##ip##M_INDEX_TABLE }

/*
 * Parameter order:
 *   rate, prev rate, next rate, prev tgg rate, next tgg rate
 *
 * If there isn't a valid next or previous rate then INV is used which
 * maps to IWL_RATE_INVALID
 *
 */
const struct iwl3945_rate_info iwl3945_rates[IWL_RATE_COUNT] = {
	IWL_DECLARE_RATE_INFO(1, INV, 2, INV, 2, INV, 2),    /*  1mbps */
	IWL_DECLARE_RATE_INFO(2, 1, 5, 1, 5, 1, 5),          /*  2mbps */
	IWL_DECLARE_RATE_INFO(5, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
	IWL_DECLARE_RATE_INFO(11, 9, 12, 5, 12, 5, 18),      /* 11mbps */
	IWL_DECLARE_RATE_INFO(6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
	IWL_DECLARE_RATE_INFO(9, 6, 11, 5, 11, 5, 11),       /*  9mbps */
	IWL_DECLARE_RATE_INFO(12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
	IWL_DECLARE_RATE_INFO(18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
	IWL_DECLARE_RATE_INFO(24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
	IWL_DECLARE_RATE_INFO(36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
	IWL_DECLARE_RATE_INFO(48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
	IWL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),/* 54mbps */
};

/* 1 = enable the iwl3945_disable_events() function */
#define IWL_EVT_DISABLE (0)
#define IWL_EVT_DISABLE_SIZE (1532/32)

/**
 * iwl3945_disable_events - Disable selected events in uCode event log
 *
 * Disable an event by writing "1"s into "disable"
 *   bitmap in SRAM.  Bit position corresponds to Event # (id/type).
 *   Default values of 0 enable uCode events to be logged.
 * Use for only special debugging.  This function is just a placeholder as-is,
 *   you'll need to provide the special bits! ...
 *   ... and set IWL_EVT_DISABLE to 1. */
void iwl3945_disable_events(struct iwl3945_priv *priv)
{
	int ret;
	int i;
	u32 base;		/* SRAM address of event log header */
	u32 disable_ptr;	/* SRAM address of event-disable bitmap array */
	u32 array_size;		/* # of u32 entries in array */
	u32 evt_disable[IWL_EVT_DISABLE_SIZE] = {
		0x00000000,	/*   31 -    0  Event id numbers */
		0x00000000,	/*   63 -   32 */
		0x00000000,	/*   95 -   64 */
		0x00000000,	/*  127 -   96 */
		0x00000000,	/*  159 -  128 */
		0x00000000,	/*  191 -  160 */
		0x00000000,	/*  223 -  192 */
		0x00000000,	/*  255 -  224 */
		0x00000000,	/*  287 -  256 */
		0x00000000,	/*  319 -  288 */
		0x00000000,	/*  351 -  320 */
		0x00000000,	/*  383 -  352 */
		0x00000000,	/*  415 -  384 */
		0x00000000,	/*  447 -  416 */
		0x00000000,	/*  479 -  448 */
		0x00000000,	/*  511 -  480 */
		0x00000000,	/*  543 -  512 */
		0x00000000,	/*  575 -  544 */
		0x00000000,	/*  607 -  576 */
		0x00000000,	/*  639 -  608 */
		0x00000000,	/*  671 -  640 */
		0x00000000,	/*  703 -  672 */
		0x00000000,	/*  735 -  704 */
		0x00000000,	/*  767 -  736 */
		0x00000000,	/*  799 -  768 */
		0x00000000,	/*  831 -  800 */
		0x00000000,	/*  863 -  832 */
		0x00000000,	/*  895 -  864 */
		0x00000000,	/*  927 -  896 */
		0x00000000,	/*  959 -  928 */
		0x00000000,	/*  991 -  960 */
		0x00000000,	/* 1023 -  992 */
		0x00000000,	/* 1055 - 1024 */
		0x00000000,	/* 1087 - 1056 */
		0x00000000,	/* 1119 - 1088 */
		0x00000000,	/* 1151 - 1120 */
		0x00000000,	/* 1183 - 1152 */
		0x00000000,	/* 1215 - 1184 */
		0x00000000,	/* 1247 - 1216 */
		0x00000000,	/* 1279 - 1248 */
		0x00000000,	/* 1311 - 1280 */
		0x00000000,	/* 1343 - 1312 */
		0x00000000,	/* 1375 - 1344 */
		0x00000000,	/* 1407 - 1376 */
		0x00000000,	/* 1439 - 1408 */
		0x00000000,	/* 1471 - 1440 */
		0x00000000,	/* 1503 - 1472 */
	};

	base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
	if (!iwl3945_hw_valid_rtc_data_addr(base)) {
		IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
		return;
	}

	ret = iwl3945_grab_nic_access(priv);
	if (ret) {
		IWL_WARNING("Can not read from adapter at this time.\n");
		return;
	}

	disable_ptr = iwl3945_read_targ_mem(priv, base + (4 * sizeof(u32)));
	array_size = iwl3945_read_targ_mem(priv, base + (5 * sizeof(u32)));
	iwl3945_release_nic_access(priv);

	if (IWL_EVT_DISABLE && (array_size == IWL_EVT_DISABLE_SIZE)) {
		IWL_DEBUG_INFO("Disabling selected uCode log events at 0x%x\n",
			       disable_ptr);
		ret = iwl3945_grab_nic_access(priv);
		for (i = 0; i < IWL_EVT_DISABLE_SIZE; i++)
			iwl3945_write_targ_mem(priv,
					   disable_ptr + (i * sizeof(u32)),
					   evt_disable[i]);

		iwl3945_release_nic_access(priv);
	} else {
		IWL_DEBUG_INFO("Selected uCode log events may be disabled\n");
		IWL_DEBUG_INFO("  by writing \"1\"s into disable bitmap\n");
		IWL_DEBUG_INFO("  in SRAM at 0x%x, size %d u32s\n",
			       disable_ptr, array_size);
	}

}

static int iwl3945_hwrate_to_plcp_idx(u8 plcp)
{
	int idx;

	for (idx = 0; idx < IWL_RATE_COUNT; idx++)
		if (iwl3945_rates[idx].plcp == plcp)
			return idx;
	return -1;
}

/**
 * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 * @priv: eeprom and antenna fields are used to determine antenna flags
 *
 * priv->eeprom  is used to determine if antenna AUX/MAIN are reversed
 * priv->antenna specifies the antenna diversity mode:
 *
 * IWL_ANTENNA_DIVERISTY - NIC selects best antenna by itself
 * IWL_ANTENNA_MAIN      - Force MAIN antenna
 * IWL_ANTENNA_AUX       - Force AUX antenna
 */
__le32 iwl3945_get_antenna_flags(const struct iwl3945_priv *priv)
{
	switch (priv->antenna) {
	case IWL_ANTENNA_DIVERSITY:
		return 0;

	case IWL_ANTENNA_MAIN:
		if (priv->eeprom.antenna_switch_type)
			return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
		return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;

	case IWL_ANTENNA_AUX:
		if (priv->eeprom.antenna_switch_type)
			return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
		return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
	}

	/* bad antenna selector value */
	IWL_ERROR("Bad antenna selector value (0x%x)\n", priv->antenna);
	return 0;		/* "diversity" is default if error */
}

#ifdef CONFIG_IWL3945_DEBUG
#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x

static const char *iwl3945_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";
}
#else
static inline const char *iwl3945_get_tx_fail_reason(u32 status)
{
	return "";
}
#endif


/**
 * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
 *
 * 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 the stack that feeds us.
 */
static void iwl3945_tx_queue_reclaim(struct iwl3945_priv *priv,
				     int txq_id, int index)
{
	struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
	struct iwl3945_queue *q = &txq->q;
	struct iwl3945_tx_info *tx_info;

	BUG_ON(txq_id == IWL_CMD_QUEUE_NUM);

	for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
		q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {

		tx_info = &txq->txb[txq->q.read_ptr];
		ieee80211_tx_status_irqsafe(priv->hw, tx_info->skb[0]);
		tx_info->skb[0] = NULL;
		iwl3945_hw_txq_free_tfd(priv, txq);
	}

	if (iwl3945_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);
}

/**
 * iwl3945_rx_reply_tx - Handle Tx response
 */
static void iwl3945_rx_reply_tx(struct iwl3945_priv *priv,
			    struct iwl3945_rx_mem_buffer *rxb)
{
	struct iwl3945_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 iwl3945_tx_queue *txq = &priv->txq[txq_id];
	struct ieee80211_tx_info *info;
	struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
	u32  status = le32_to_cpu(tx_resp->status);
	int rate_idx;

	if ((index >= txq->q.n_bd) || (iwl3945_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.write_ptr,
			  txq->q.read_ptr);
		return;
	}

	info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
	memset(&info->status, 0, sizeof(info->status));

	info->status.retry_count = tx_resp->failure_frame;
	/* tx_status->rts_retry_count = tx_resp->failure_rts; */
	info->flags |= ((status & TX_STATUS_MSK) == TX_STATUS_SUCCESS) ?
				IEEE80211_TX_STAT_ACK : 0;

	IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
			txq_id, iwl3945_get_tx_fail_reason(status), status,
			tx_resp->rate, tx_resp->failure_frame);

	rate_idx = iwl3945_hwrate_to_plcp_idx(tx_resp->rate);
	if (info->band == IEEE80211_BAND_5GHZ)
		rate_idx -= IWL_FIRST_OFDM_RATE;
	info->tx_rate_idx = rate_idx;
	IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
	iwl3945_tx_queue_reclaim(priv, txq_id, index);

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



/*****************************************************************************
 *
 * Intel PRO/Wireless 3945ABG/BG Network Connection
 *
 *  RX handler implementations
 *
 *****************************************************************************/

void iwl3945_hw_rx_statistics(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
{
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
	IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
		     (int)sizeof(struct iwl3945_notif_statistics),
		     le32_to_cpu(pkt->len));

	memcpy(&priv->statistics, pkt->u.raw, sizeof(priv->statistics));

	iwl3945_led_background(priv);

	priv->last_statistics_time = jiffies;
}

/******************************************************************************
 *
 * Misc. internal state and helper functions
 *
 ******************************************************************************/
#ifdef CONFIG_IWL3945_DEBUG

/**
 * iwl3945_report_frame - dump frame to syslog during debug sessions
 *
 * You may 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.
 */
static void iwl3945_dbg_report_frame(struct iwl3945_priv *priv,
		      struct iwl3945_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;
	__le16 fc;
	u16 seq_ctl;
	u16 channel;
	u16 phy_flags;
	u16 length;
	u16 status;
	u16 bcn_tmr;
	u32 tsf_low;
	u64 tsf;
	u8 rssi;
	u8 agc;
	u16 sig_avg;
	u16 noise_diff;
	struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
	struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
	struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
	u8 *data = IWL_RX_DATA(pkt);

	/* MAC header */
	fc = 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);
	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 & ~cpu_to_le16(IEEE80211_FCTL_PROTECTED)) ==
	    cpu_to_le16(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 (ieee80211_has_retry(fc))
			title = "Retry";
		else if (ieee80211_is_assoc_resp(fc))
			title = "AscRsp";
		else if (ieee80211_is_reassoc_resp(fc))
			title = "RasRsp";
		else if (ieee80211_is_probe_resp(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 = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
		if (rate == -1)
			rate = 0;
		else
			rate = iwl3945_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, le16_to_cpu(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, le16_to_cpu(fc), header->addr1[5],
				     header->addr3[5], rssi,
				     tsf_low - priv->scan_start_tsf,
				     phy_flags, channel);
		}
	}
	if (print_dump)
		iwl3945_print_hex_dump(IWL_DL_RX, data, length);
}
#else
static inline void iwl3945_dbg_report_frame(struct iwl3945_priv *priv,
		      struct iwl3945_rx_packet *pkt,
		      struct ieee80211_hdr *header, int group100)
{
}
#endif


static void iwl3945_add_radiotap(struct iwl3945_priv *priv,
				 struct sk_buff *skb,
				 struct iwl3945_rx_frame_hdr *rx_hdr,
				 struct ieee80211_rx_status *stats)
{
	/* First cache any information we need before we overwrite
	 * the information provided in the skb from the hardware */
	s8 signal = stats->signal;
	s8 noise = 0;
	int rate = stats->rate_idx;
	u64 tsf = stats->mactime;
	__le16 phy_flags_hw = rx_hdr->phy_flags, antenna;

	struct iwl3945_rt_rx_hdr {
		struct ieee80211_radiotap_header rt_hdr;
		__le64 rt_tsf;		/* TSF */
		u8 rt_flags;		/* radiotap packet flags */
		u8 rt_rate;		/* rate in 500kb/s */
		__le16 rt_channelMHz;	/* channel in MHz */
		__le16 rt_chbitmask;	/* channel bitfield */
		s8 rt_dbmsignal;	/* signal in dBm, kluged to signed */
		s8 rt_dbmnoise;
		u8 rt_antenna;		/* antenna number */
	} __attribute__ ((packed)) *iwl3945_rt;

	if (skb_headroom(skb) < sizeof(*iwl3945_rt)) {
		if (net_ratelimit())
			printk(KERN_ERR "not enough headroom [%d] for "
			       "radiotap head [%zd]\n",
			       skb_headroom(skb), sizeof(*iwl3945_rt));
		return;
	}

	/* put radiotap header in front of 802.11 header and data */
	iwl3945_rt = (void *)skb_push(skb, sizeof(*iwl3945_rt));

	/* initialise radiotap header */
	iwl3945_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
	iwl3945_rt->rt_hdr.it_pad = 0;

	/* total header + data */
	put_unaligned_le16(sizeof(*iwl3945_rt), &iwl3945_rt->rt_hdr.it_len);

	/* Indicate all the fields we add to the radiotap header */
	put_unaligned_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),
			&iwl3945_rt->rt_hdr.it_present);

	/* Zero the flags, we'll add to them as we go */
	iwl3945_rt->rt_flags = 0;

	put_unaligned_le64(tsf, &iwl3945_rt->rt_tsf);

	iwl3945_rt->rt_dbmsignal = signal;
	iwl3945_rt->rt_dbmnoise = noise;

	/* Convert the channel frequency and set the flags */
	put_unaligned_le16(stats->freq, &iwl3945_rt->rt_channelMHz);
	if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
		put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ,
			      &iwl3945_rt->rt_chbitmask);
	else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
		put_unaligned_le16(IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ,
			      &iwl3945_rt->rt_chbitmask);
	else	/* 802.11g */
		put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ,
			      &iwl3945_rt->rt_chbitmask);

	if (rate == -1)
		iwl3945_rt->rt_rate = 0;
	else
		iwl3945_rt->rt_rate = iwl3945_rates[rate].ieee;

	/* antenna number */
	antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK;
	iwl3945_rt->rt_antenna = le16_to_cpu(antenna) >> 4;

	/* set the preamble flag if we have it */
	if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
		iwl3945_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;

	stats->flag |= RX_FLAG_RADIOTAP;
}

static void iwl3945_handle_data_packet(struct iwl3945_priv *priv, int is_data,
				   struct iwl3945_rx_mem_buffer *rxb,
				   struct ieee80211_rx_status *stats)
{
	struct ieee80211_hdr *hdr;
	struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
	struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
	struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
	short len = le16_to_cpu(rx_hdr->len);

	/* We received data from the HW, so stop the watchdog */
	if (unlikely((len + IWL_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
		IWL_DEBUG_DROP("Corruption detected!\n");
		return;
	}

	/* We only process data packets if the interface is open */
	if (unlikely(!priv->is_open)) {
		IWL_DEBUG_DROP_LIMIT
		    ("Dropping packet while interface is not open.\n");
		return;
	}

	skb_reserve(rxb->skb, (void *)rx_hdr->payload - (void *)pkt);
	/* Set the size of the skb to the size of the frame */
	skb_put(rxb->skb, le16_to_cpu(rx_hdr->len));

	hdr = (void *)rxb->skb->data;

	if (iwl3945_param_hwcrypto)
		iwl3945_set_decrypted_flag(priv, rxb->skb,
				       le32_to_cpu(rx_end->status), stats);

	if (priv->add_radiotap)
		iwl3945_add_radiotap(priv, rxb->skb, rx_hdr, stats);

#ifdef CONFIG_IWL3945_LEDS
	if (is_data)
		priv->rxtxpackets += len;
#endif
	ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
	rxb->skb = NULL;
}

#define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)

static void iwl3945_rx_reply_rx(struct iwl3945_priv *priv,
				struct iwl3945_rx_mem_buffer *rxb)
{
	struct ieee80211_hdr *header;
	struct ieee80211_rx_status rx_status;
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
	struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
	struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
	int snr;
	u16 rx_stats_sig_avg = le16_to_cpu(rx_stats->sig_avg);
	u16 rx_stats_noise_diff = le16_to_cpu(rx_stats->noise_diff);
	u8 network_packet;

	rx_status.antenna = 0;
	rx_status.flag = 0;
	rx_status.mactime = le64_to_cpu(rx_end->timestamp);
	rx_status.freq =
		ieee80211_channel_to_frequency(le16_to_cpu(rx_hdr->channel));
	rx_status.band = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
				IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;

	rx_status.rate_idx = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
	if (rx_status.band == IEEE80211_BAND_5GHZ)
		rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;

	if ((unlikely(rx_stats->phy_count > 20))) {
		IWL_DEBUG_DROP
		    ("dsp size out of range [0,20]: "
		     "%d/n", rx_stats->phy_count);
		return;
	}

	if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR)
	    || !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
		IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
		return;
	}

	if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
		iwl3945_handle_data_packet(priv, 1, rxb, &rx_status);
		return;
	}

	/* Convert 3945's rssi indicator to dBm */
	rx_status.signal = rx_stats->rssi - IWL_RSSI_OFFSET;

	/* Set default noise value to -127 */
	if (priv->last_rx_noise == 0)
		priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;

	/* 3945 provides noise info for OFDM frames only.
	 * sig_avg and noise_diff are measured by the 3945's digital signal
	 *   processor (DSP), and indicate linear levels of signal level and
	 *   distortion/noise within the packet preamble after
	 *   automatic gain control (AGC).  sig_avg should stay fairly
	 *   constant if the radio's AGC is working well.
	 * Since these values are linear (not dB or dBm), linear
	 *   signal-to-noise ratio (SNR) is (sig_avg / noise_diff).
	 * Convert linear SNR to dB SNR, then subtract that from rssi dBm
	 *   to obtain noise level in dBm.
	 * Calculate rx_status.signal (quality indicator in %) based on SNR. */
	if (rx_stats_noise_diff) {
		snr = rx_stats_sig_avg / rx_stats_noise_diff;
		rx_status.noise = rx_status.signal -
					iwl3945_calc_db_from_ratio(snr);
		rx_status.qual = iwl3945_calc_sig_qual(rx_status.signal,
							 rx_status.noise);

	/* If noise info not available, calculate signal quality indicator (%)
	 *   using just the dBm signal level. */
	} else {
		rx_status.noise = priv->last_rx_noise;
		rx_status.qual = iwl3945_calc_sig_qual(rx_status.signal, 0);
	}


	IWL_DEBUG_STATS("Rssi %d noise %d qual %d sig_avg %d noise_diff %d\n",
			rx_status.signal, rx_status.noise, rx_status.qual,
			rx_stats_sig_avg, rx_stats_noise_diff);

	header = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);

	network_packet = iwl3945_is_network_packet(priv, header);

	IWL_DEBUG_STATS_LIMIT("[%c] %d RSSI:%d Signal:%u, Noise:%u, Rate:%u\n",
			      network_packet ? '*' : ' ',
			      le16_to_cpu(rx_hdr->channel),
			      rx_status.signal, rx_status.signal,
			      rx_status.noise, rx_status.rate_idx);

#ifdef CONFIG_IWL3945_DEBUG
	if (iwl3945_debug_level & (IWL_DL_RX))
		/* Set "1" to report good data frames in groups of 100 */
		iwl3945_dbg_report_frame(priv, pkt, header, 1);
#endif

	if (network_packet) {
		priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
		priv->last_tsf = le64_to_cpu(rx_end->timestamp);
		priv->last_rx_rssi = rx_status.signal;
		priv->last_rx_noise = rx_status.noise;
	}

	switch (le16_to_cpu(header->frame_control) & IEEE80211_FCTL_FTYPE) {
	case IEEE80211_FTYPE_MGMT:
		switch (le16_to_cpu(header->frame_control) &
			IEEE80211_FCTL_STYPE) {
		case IEEE80211_STYPE_PROBE_RESP:
		case IEEE80211_STYPE_BEACON:{
				/* If this is a beacon or probe response for
				 * our network then cache the beacon
				 * timestamp */
				if ((((priv->iw_mode == IEEE80211_IF_TYPE_STA)
				      && !compare_ether_addr(header->addr2,
							     priv->bssid)) ||
				     ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
				      && !compare_ether_addr(header->addr3,
							     priv->bssid)))) {
					struct ieee80211_mgmt *mgmt =
					    (struct ieee80211_mgmt *)header;
					__le32 *pos;
					pos =
					    (__le32 *) & mgmt->u.beacon.
					    timestamp;
					priv->timestamp0 = le32_to_cpu(pos[0]);
					priv->timestamp1 = le32_to_cpu(pos[1]);
					priv->beacon_int = le16_to_cpu(
					    mgmt->u.beacon.beacon_int);
					if (priv->call_post_assoc_from_beacon &&
					    (priv->iw_mode ==
						IEEE80211_IF_TYPE_STA))
						queue_work(priv->workqueue,
						    &priv->post_associate.work);

					priv->call_post_assoc_from_beacon = 0;
				}

				break;
			}

		case IEEE80211_STYPE_ACTION:
			/* TODO: Parse 802.11h frames for CSA... */
			break;

			/*
			 * TODO: Use the new callback function from
			 * mac80211 instead of sniffing these packets.
			 */
		case IEEE80211_STYPE_ASSOC_RESP:
		case IEEE80211_STYPE_REASSOC_RESP:{
				struct ieee80211_mgmt *mgnt =
				    (struct ieee80211_mgmt *)header;

				/* We have just associated, give some
				 * time for the 4-way handshake if
				 * any. Don't start scan too early. */
				priv->next_scan_jiffies = jiffies +
					IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;

				priv->assoc_id = (~((1 << 15) | (1 << 14)) &
						  le16_to_cpu(mgnt->u.
							      assoc_resp.aid));
				priv->assoc_capability =
				    le16_to_cpu(mgnt->u.assoc_resp.capab_info);
				if (priv->beacon_int)
					queue_work(priv->workqueue,
					    &priv->post_associate.work);
				else
					priv->call_post_assoc_from_beacon = 1;
				break;
			}

		case IEEE80211_STYPE_PROBE_REQ:{
				DECLARE_MAC_BUF(mac1);
				DECLARE_MAC_BUF(mac2);
				DECLARE_MAC_BUF(mac3);
				if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
					IWL_DEBUG_DROP
					    ("Dropping (non network): %s"
					     ", %s, %s\n",
					     print_mac(mac1, header->addr1),
					     print_mac(mac2, header->addr2),
					     print_mac(mac3, header->addr3));
				return;
			}
		}

		iwl3945_handle_data_packet(priv, 0, rxb, &rx_status);
		break;

	case IEEE80211_FTYPE_CTL:
		break;

	case IEEE80211_FTYPE_DATA: {
		DECLARE_MAC_BUF(mac1);
		DECLARE_MAC_BUF(mac2);
		DECLARE_MAC_BUF(mac3);

		if (unlikely(iwl3945_is_duplicate_packet(priv, header)))
			IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
				       print_mac(mac1, header->addr1),
				       print_mac(mac2, header->addr2),
				       print_mac(mac3, header->addr3));
		else
			iwl3945_handle_data_packet(priv, 1, rxb, &rx_status);
		break;
	}
	}
}

int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl3945_priv *priv, void *ptr,
				 dma_addr_t addr, u16 len)
{
	int count;
	u32 pad;
	struct iwl3945_tfd_frame *tfd = (struct iwl3945_tfd_frame *)ptr;

	count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
	pad = TFD_CTL_PAD_GET(le32_to_cpu(tfd->control_flags));

	if ((count >= NUM_TFD_CHUNKS) || (count < 0)) {
		IWL_ERROR("Error can not send more than %d chunks\n",
			  NUM_TFD_CHUNKS);
		return -EINVAL;
	}

	tfd->pa[count].addr = cpu_to_le32(addr);
	tfd->pa[count].len = cpu_to_le32(len);

	count++;

	tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(count) |
					 TFD_CTL_PAD_SET(pad));

	return 0;
}

/**
 * iwl3945_hw_txq_free_tfd - Free one TFD, those at index [txq->q.read_ptr]
 *
 * Does NOT advance any indexes
 */
int iwl3945_hw_txq_free_tfd(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
{
	struct iwl3945_tfd_frame *bd_tmp = (struct iwl3945_tfd_frame *)&txq->bd[0];
	struct iwl3945_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
	struct pci_dev *dev = priv->pci_dev;
	int i;
	int counter;

	/* classify bd */
	if (txq->q.id == IWL_CMD_QUEUE_NUM)
		/* nothing to cleanup after for host commands */
		return 0;

	/* sanity check */
	counter = TFD_CTL_COUNT_GET(le32_to_cpu(bd->control_flags));
	if (counter > NUM_TFD_CHUNKS) {
		IWL_ERROR("Too many chunks: %i\n", counter);
		/* @todo issue fatal error, it is quite serious situation */
		return 0;
	}

	/* unmap chunks if any */

	for (i = 1; i < counter; i++) {
		pci_unmap_single(dev, le32_to_cpu(bd->pa[i].addr),
				 le32_to_cpu(bd->pa[i].len), PCI_DMA_TODEVICE);
		if (txq->txb[txq->q.read_ptr].skb[0]) {
			struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[0];
			if (txq->txb[txq->q.read_ptr].skb[0]) {
				/* Can be called from interrupt context */
				dev_kfree_skb_any(skb);
				txq->txb[txq->q.read_ptr].skb[0] = NULL;
			}
		}
	}
	return 0;
}

u8 iwl3945_hw_find_station(struct iwl3945_priv *priv, const u8 *addr)
{
	int i;
	int ret = IWL_INVALID_STATION;
	unsigned long flags;
	DECLARE_MAC_BUF(mac);

	spin_lock_irqsave(&priv->sta_lock, flags);
	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))) {
			ret = i;
			goto out;
		}

	IWL_DEBUG_INFO("can not find STA %s (total %d)\n",
		       print_mac(mac, addr), priv->num_stations);
 out:
	spin_unlock_irqrestore(&priv->sta_lock, flags);
	return ret;
}

/**
 * iwl3945_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
 *
*/
void iwl3945_hw_build_tx_cmd_rate(struct iwl3945_priv *priv,
			      struct iwl3945_cmd *cmd,
			      struct ieee80211_tx_info *info,
			      struct ieee80211_hdr *hdr, int sta_id, int tx_id)
{
	unsigned long flags;
	u16 hw_value = ieee80211_get_tx_rate(priv->hw, info)->hw_value;
	u16 rate_index = min(hw_value & 0xffff, IWL_RATE_COUNT - 1);
	u16 rate_mask;
	int rate;
	u8 rts_retry_limit;
	u8 data_retry_limit;
	__le32 tx_flags;
	__le16 fc = hdr->frame_control;

	rate = iwl3945_rates[rate_index].plcp;
	tx_flags = cmd->cmd.tx.tx_flags;

	/* We need to figure out how to get the sta->supp_rates while
	 * in this running context */
	rate_mask = IWL_RATES_MASK;

	spin_lock_irqsave(&priv->sta_lock, flags);

	priv->stations[sta_id].current_rate.rate_n_flags = rate;

	if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
	    (sta_id != priv->hw_setting.bcast_sta_id) &&
		(sta_id != IWL_MULTICAST_ID))
		priv->stations[IWL_STA_ID].current_rate.rate_n_flags = rate;

	spin_unlock_irqrestore(&priv->sta_lock, flags);

	if (tx_id >= IWL_CMD_QUEUE_NUM)
		rts_retry_limit = 3;
	else
		rts_retry_limit = 7;

	if (ieee80211_is_probe_resp(fc)) {
		data_retry_limit = 3;
		if (data_retry_limit < rts_retry_limit)
			rts_retry_limit = data_retry_limit;
	} else
		data_retry_limit = IWL_DEFAULT_TX_RETRY;

	if (priv->data_retry_limit != -1)
		data_retry_limit = priv->data_retry_limit;

	if (ieee80211_is_mgmt(fc)) {
		switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
		case cpu_to_le16(IEEE80211_STYPE_AUTH):
		case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
		case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
		case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
			if (tx_flags & TX_CMD_FLG_RTS_MSK) {
				tx_flags &= ~TX_CMD_FLG_RTS_MSK;
				tx_flags |= TX_CMD_FLG_CTS_MSK;
			}
			break;
		default:
			break;
		}
	}

	cmd->cmd.tx.rts_retry_limit = rts_retry_limit;
	cmd->cmd.tx.data_retry_limit = data_retry_limit;
	cmd->cmd.tx.rate = rate;
	cmd->cmd.tx.tx_flags = tx_flags;

	/* OFDM */
	cmd->cmd.tx.supp_rates[0] =
	   ((rate_mask & IWL_OFDM_RATES_MASK) >> IWL_FIRST_OFDM_RATE) & 0xFF;

	/* CCK */
	cmd->cmd.tx.supp_rates[1] = (rate_mask & 0xF);

	IWL_DEBUG_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
		       "cck/ofdm mask: 0x%x/0x%x\n", sta_id,
		       cmd->cmd.tx.rate, le32_to_cpu(cmd->cmd.tx.tx_flags),
		       cmd->cmd.tx.supp_rates[1], cmd->cmd.tx.supp_rates[0]);
}

u8 iwl3945_sync_sta(struct iwl3945_priv *priv, int sta_id, u16 tx_rate, u8 flags)
{
	unsigned long flags_spin;
	struct iwl3945_station_entry *station;

	if (sta_id == IWL_INVALID_STATION)
		return IWL_INVALID_STATION;

	spin_lock_irqsave(&priv->sta_lock, flags_spin);
	station = &priv->stations[sta_id];

	station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
	station->sta.rate_n_flags = cpu_to_le16(tx_rate);
	station->current_rate.rate_n_flags = tx_rate;
	station->sta.mode = STA_CONTROL_MODIFY_MSK;

	spin_unlock_irqrestore(&priv->sta_lock, flags_spin);

	iwl3945_send_add_station(priv, &station->sta, flags);
	IWL_DEBUG_RATE("SCALE sync station %d to rate %d\n",
			sta_id, tx_rate);
	return sta_id;
}

static int iwl3945_nic_set_pwr_src(struct iwl3945_priv *priv, int pwr_max)
{
	int rc;
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);
	rc = iwl3945_grab_nic_access(priv);
	if (rc) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return rc;
	}

	if (!pwr_max) {
		u32 val;

		rc = pci_read_config_dword(priv->pci_dev,
				PCI_POWER_SOURCE, &val);
		if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
			iwl3945_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
					APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
					~APMG_PS_CTRL_MSK_PWR_SRC);
			iwl3945_release_nic_access(priv);

			iwl3945_poll_bit(priv, CSR_GPIO_IN,
				     CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
				     CSR_GPIO_IN_BIT_AUX_POWER, 5000);
		} else
			iwl3945_release_nic_access(priv);
	} else {
		iwl3945_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
				APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
				~APMG_PS_CTRL_MSK_PWR_SRC);

		iwl3945_release_nic_access(priv);
		iwl3945_poll_bit(priv, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
			     CSR_GPIO_IN_BIT_AUX_POWER, 5000);	/* uS */
	}
	spin_unlock_irqrestore(&priv->lock, flags);

	return rc;
}

static int iwl3945_rx_init(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
{
	int rc;
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);
	rc = iwl3945_grab_nic_access(priv);
	if (rc) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return rc;
	}

	iwl3945_write_direct32(priv, FH_RCSR_RBD_BASE(0), rxq->dma_addr);
	iwl3945_write_direct32(priv, FH_RCSR_RPTR_ADDR(0),
			     priv->hw_setting.shared_phys +
			     offsetof(struct iwl3945_shared, rx_read_ptr[0]));
	iwl3945_write_direct32(priv, FH_RCSR_WPTR(0), 0);
	iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0),
		ALM_FH_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
		ALM_FH_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
		ALM_FH_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
		ALM_FH_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 |
		(RX_QUEUE_SIZE_LOG << ALM_FH_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE) |
		ALM_FH_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST |
		(1 << ALM_FH_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH) |
		ALM_FH_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);

	/* fake read to flush all prev I/O */
	iwl3945_read_direct32(priv, FH_RSSR_CTRL);

	iwl3945_release_nic_access(priv);
	spin_unlock_irqrestore(&priv->lock, flags);

	return 0;
}

static int iwl3945_tx_reset(struct iwl3945_priv *priv)
{
	int rc;
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);
	rc = iwl3945_grab_nic_access(priv);
	if (rc) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return rc;
	}

	/* bypass mode */
	iwl3945_write_prph(priv, ALM_SCD_MODE_REG, 0x2);

	/* RA 0 is active */
	iwl3945_write_prph(priv, ALM_SCD_ARASTAT_REG, 0x01);

	/* all 6 fifo are active */
	iwl3945_write_prph(priv, ALM_SCD_TXFACT_REG, 0x3f);

	iwl3945_write_prph(priv, ALM_SCD_SBYP_MODE_1_REG, 0x010000);
	iwl3945_write_prph(priv, ALM_SCD_SBYP_MODE_2_REG, 0x030002);
	iwl3945_write_prph(priv, ALM_SCD_TXF4MF_REG, 0x000004);
	iwl3945_write_prph(priv, ALM_SCD_TXF5MF_REG, 0x000005);

	iwl3945_write_direct32(priv, FH_TSSR_CBB_BASE,
			     priv->hw_setting.shared_phys);

	iwl3945_write_direct32(priv, FH_TSSR_MSG_CONFIG,
		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);

	iwl3945_release_nic_access(priv);
	spin_unlock_irqrestore(&priv->lock, flags);

	return 0;
}

/**
 * iwl3945_txq_ctx_reset - Reset TX queue context
 *
 * Destroys all DMA structures and initialize them again
 */
static int iwl3945_txq_ctx_reset(struct iwl3945_priv *priv)
{
	int rc;
	int txq_id, slots_num;

	iwl3945_hw_txq_ctx_free(priv);

	/* Tx CMD queue */
	rc = iwl3945_tx_reset(priv);
	if (rc)
		goto error;

	/* Tx queue(s) */
	for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++) {
		slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
				TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
		rc = iwl3945_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
				txq_id);
		if (rc) {
			IWL_ERROR("Tx %d queue init failed\n", txq_id);
			goto error;
		}
	}

	return rc;

 error:
	iwl3945_hw_txq_ctx_free(priv);
	return rc;
}

int iwl3945_hw_nic_init(struct iwl3945_priv *priv)
{
	u8 rev_id;
	int rc;
	unsigned long flags;
	struct iwl3945_rx_queue *rxq = &priv->rxq;

	iwl3945_power_init_handle(priv);

	spin_lock_irqsave(&priv->lock, flags);
	iwl3945_set_bit(priv, CSR_ANA_PLL_CFG, CSR39_ANA_PLL_CFG_VAL);
	iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
		    CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);

	iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
	rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
	if (rc < 0) {
		spin_unlock_irqrestore(&priv->lock, flags);
		IWL_DEBUG_INFO("Failed to init the card\n");
		return rc;
	}

	rc = iwl3945_grab_nic_access(priv);
	if (rc) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return rc;
	}
	iwl3945_write_prph(priv, APMG_CLK_EN_REG,
				 APMG_CLK_VAL_DMA_CLK_RQT |
				 APMG_CLK_VAL_BSM_CLK_RQT);
	udelay(20);
	iwl3945_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
				    APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
	iwl3945_release_nic_access(priv);
	spin_unlock_irqrestore(&priv->lock, flags);

	/* Determine HW type */
	rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
	if (rc)
		return rc;
	IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);

	iwl3945_nic_set_pwr_src(priv, 1);
	spin_lock_irqsave(&priv->lock, flags);

	if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
		IWL_DEBUG_INFO("RTP type \n");
	else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
		IWL_DEBUG_INFO("3945 RADIO-MB type\n");
		iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
			    CSR39_HW_IF_CONFIG_REG_BIT_3945_MB);
	} else {
		IWL_DEBUG_INFO("3945 RADIO-MM type\n");
		iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
			    CSR39_HW_IF_CONFIG_REG_BIT_3945_MM);
	}

	if (EEPROM_SKU_CAP_OP_MODE_MRC == priv->eeprom.sku_cap) {
		IWL_DEBUG_INFO("SKU OP mode is mrc\n");
		iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
			    CSR39_HW_IF_CONFIG_REG_BIT_SKU_MRC);
	} else
		IWL_DEBUG_INFO("SKU OP mode is basic\n");

	if ((priv->eeprom.board_revision & 0xF0) == 0xD0) {
		IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
			       priv->eeprom.board_revision);
		iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
			    CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
	} else {
		IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
			       priv->eeprom.board_revision);
		iwl3945_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
			      CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
	}

	if (priv->eeprom.almgor_m_version <= 1) {
		iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
			    CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
		IWL_DEBUG_INFO("Card M type A version is 0x%X\n",
			       priv->eeprom.almgor_m_version);
	} else {
		IWL_DEBUG_INFO("Card M type B version is 0x%X\n",
			       priv->eeprom.almgor_m_version);
		iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
			    CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
	}
	spin_unlock_irqrestore(&priv->lock, flags);

	if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
		IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");

	if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
		IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");

	/* Allocate the RX queue, or reset if it is already allocated */
	if (!rxq->bd) {
		rc = iwl3945_rx_queue_alloc(priv);
		if (rc) {
			IWL_ERROR("Unable to initialize Rx queue\n");
			return -ENOMEM;
		}
	} else
		iwl3945_rx_queue_reset(priv, rxq);

	iwl3945_rx_replenish(priv);

	iwl3945_rx_init(priv, rxq);

	spin_lock_irqsave(&priv->lock, flags);

	/* Look at using this instead:
	rxq->need_update = 1;
	iwl3945_rx_queue_update_write_ptr(priv, rxq);
	*/

	rc = iwl3945_grab_nic_access(priv);
	if (rc) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return rc;
	}
	iwl3945_write_direct32(priv, FH_RCSR_WPTR(0), rxq->write & ~7);
	iwl3945_release_nic_access(priv);

	spin_unlock_irqrestore(&priv->lock, flags);

	rc = iwl3945_txq_ctx_reset(priv);
	if (rc)
		return rc;

	set_bit(STATUS_INIT, &priv->status);

	return 0;
}

/**
 * iwl3945_hw_txq_ctx_free - Free TXQ Context
 *
 * Destroy all TX DMA queues and structures
 */
void iwl3945_hw_txq_ctx_free(struct iwl3945_priv *priv)
{
	int txq_id;

	/* Tx queues */
	for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++)
		iwl3945_tx_queue_free(priv, &priv->txq[txq_id]);
}

void iwl3945_hw_txq_ctx_stop(struct iwl3945_priv *priv)
{
	int queue;
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);
	if (iwl3945_grab_nic_access(priv)) {
		spin_unlock_irqrestore(&priv->lock, flags);
		iwl3945_hw_txq_ctx_free(priv);
		return;
	}

	/* stop SCD */
	iwl3945_write_prph(priv, ALM_SCD_MODE_REG, 0);

	/* reset TFD queues */
	for (queue = TFD_QUEUE_MIN; queue < TFD_QUEUE_MAX; queue++) {
		iwl3945_write_direct32(priv, FH_TCSR_CONFIG(queue), 0x0);
		iwl3945_poll_direct_bit(priv, FH_TSSR_TX_STATUS,
				ALM_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(queue),
				1000);
	}

	iwl3945_release_nic_access(priv);
	spin_unlock_irqrestore(&priv->lock, flags);

	iwl3945_hw_txq_ctx_free(priv);
}

int iwl3945_hw_nic_stop_master(struct iwl3945_priv *priv)
{
	int rc = 0;
	u32 reg_val;
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);

	/* set stop master bit */
	iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);

	reg_val = iwl3945_read32(priv, CSR_GP_CNTRL);

	if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
	    (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
		IWL_DEBUG_INFO("Card in power save, master is already "
			       "stopped\n");
	else {
		rc = iwl3945_poll_bit(priv, CSR_RESET,
				  CSR_RESET_REG_FLAG_MASTER_DISABLED,
				  CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
		if (rc < 0) {
			spin_unlock_irqrestore(&priv->lock, flags);
			return rc;
		}
	}

	spin_unlock_irqrestore(&priv->lock, flags);
	IWL_DEBUG_INFO("stop master\n");

	return rc;
}

int iwl3945_hw_nic_reset(struct iwl3945_priv *priv)
{
	int rc;
	unsigned long flags;

	iwl3945_hw_nic_stop_master(priv);

	spin_lock_irqsave(&priv->lock, flags);

	iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);

	rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);

	rc = iwl3945_grab_nic_access(priv);
	if (!rc) {
		iwl3945_write_prph(priv, APMG_CLK_CTRL_REG,
					 APMG_CLK_VAL_BSM_CLK_RQT);

		udelay(10);

		iwl3945_set_bit(priv, CSR_GP_CNTRL,
			    CSR_GP_CNTRL_REG_FLAG_INIT_DONE);

		iwl3945_write_prph(priv, APMG_RTC_INT_MSK_REG, 0x0);
		iwl3945_write_prph(priv, APMG_RTC_INT_STT_REG,
					0xFFFFFFFF);

		/* enable DMA */
		iwl3945_write_prph(priv, APMG_CLK_EN_REG,
					 APMG_CLK_VAL_DMA_CLK_RQT |
					 APMG_CLK_VAL_BSM_CLK_RQT);
		udelay(10);

		iwl3945_set_bits_prph(priv, APMG_PS_CTRL_REG,
				APMG_PS_CTRL_VAL_RESET_REQ);
		udelay(5);
		iwl3945_clear_bits_prph(priv, APMG_PS_CTRL_REG,
				APMG_PS_CTRL_VAL_RESET_REQ);
		iwl3945_release_nic_access(priv);
	}

	/* Clear the 'host command active' bit... */
	clear_bit(STATUS_HCMD_ACTIVE, &priv->status);

	wake_up_interruptible(&priv->wait_command_queue);
	spin_unlock_irqrestore(&priv->lock, flags);

	return rc;
}

/**
 * iwl3945_hw_reg_adjust_power_by_temp
 * return index delta into power gain settings table
*/
static int iwl3945_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
{
	return (new_reading - old_reading) * (-11) / 100;
}

/**
 * iwl3945_hw_reg_temp_out_of_range - Keep temperature in sane range
 */
static inline int iwl3945_hw_reg_temp_out_of_range(int temperature)
{
	return (((temperature < -260) || (temperature > 25)) ? 1 : 0);
}

int iwl3945_hw_get_temperature(struct iwl3945_priv *priv)
{
	return iwl3945_read32(priv, CSR_UCODE_DRV_GP2);
}

/**
 * iwl3945_hw_reg_txpower_get_temperature
 * get the current temperature by reading from NIC
*/
static int iwl3945_hw_reg_txpower_get_temperature(struct iwl3945_priv *priv)
{
	int temperature;

	temperature = iwl3945_hw_get_temperature(priv);

	/* driver's okay range is -260 to +25.
	 *   human readable okay range is 0 to +285 */
	IWL_DEBUG_INFO("Temperature: %d\n", temperature + IWL_TEMP_CONVERT);

	/* handle insane temp reading */
	if (iwl3945_hw_reg_temp_out_of_range(temperature)) {
		IWL_ERROR("Error bad temperature value  %d\n", temperature);

		/* if really really hot(?),
		 *   substitute the 3rd band/group's temp measured at factory */
		if (priv->last_temperature > 100)
			temperature = priv->eeprom.groups[2].temperature;
		else /* else use most recent "sane" value from driver */
			temperature = priv->last_temperature;
	}

	return temperature;	/* raw, not "human readable" */
}

/* Adjust Txpower only if temperature variance is greater than threshold.
 *
 * Both are lower than older versions' 9 degrees */
#define IWL_TEMPERATURE_LIMIT_TIMER   6

/**
 * is_temp_calib_needed - determines if new calibration is needed
 *
 * records new temperature in tx_mgr->temperature.
 * replaces tx_mgr->last_temperature *only* if calib needed
 *    (assumes caller will actually do the calibration!). */
static int is_temp_calib_needed(struct iwl3945_priv *priv)
{
	int temp_diff;

	priv->temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
	temp_diff = priv->temperature - priv->last_temperature;

	/* get absolute value */
	if (temp_diff < 0) {
		IWL_DEBUG_POWER("Getting cooler, delta %d,\n", temp_diff);
		temp_diff = -temp_diff;
	} else if (temp_diff == 0)
		IWL_DEBUG_POWER("Same temp,\n");
	else
		IWL_DEBUG_POWER("Getting warmer, delta %d,\n", temp_diff);

	/* if we don't need calibration, *don't* update last_temperature */
	if (temp_diff < IWL_TEMPERATURE_LIMIT_TIMER) {
		IWL_DEBUG_POWER("Timed thermal calib not needed\n");
		return 0;
	}

	IWL_DEBUG_POWER("Timed thermal calib needed\n");

	/* assume that caller will actually do calib ...
	 *   update the "last temperature" value */
	priv->last_temperature = priv->temperature;
	return 1;
}

#define IWL_MAX_GAIN_ENTRIES 78
#define IWL_CCK_FROM_OFDM_POWER_DIFF  -5
#define IWL_CCK_FROM_OFDM_INDEX_DIFF (10)

/* radio and DSP power table, each step is 1/2 dB.
 * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
static struct iwl3945_tx_power power_gain_table[2][IWL_MAX_GAIN_ENTRIES] = {
	{
	 {251, 127},		/* 2.4 GHz, highest power */
	 {251, 127},
	 {251, 127},
	 {251, 127},
	 {251, 125},
	 {251, 110},
	 {251, 105},
	 {251, 98},
	 {187, 125},
	 {187, 115},
	 {187, 108},
	 {187, 99},
	 {243, 119},
	 {243, 111},
	 {243, 105},
	 {243, 97},
	 {243, 92},
	 {211, 106},
	 {211, 100},
	 {179, 120},
	 {179, 113},
	 {179, 107},
	 {147, 125},
	 {147, 119},
	 {147, 112},
	 {147, 106},
	 {147, 101},
	 {147, 97},
	 {147, 91},
	 {115, 107},
	 {235, 121},
	 {235, 115},
	 {235, 109},
	 {203, 127},
	 {203, 121},
	 {203, 115},
	 {203, 108},
	 {203, 102},
	 {203, 96},
	 {203, 92},
	 {171, 110},
	 {171, 104},
	 {171, 98},
	 {139, 116},
	 {227, 125},
	 {227, 119},
	 {227, 113},
	 {227, 107},
	 {227, 101},
	 {227, 96},
	 {195, 113},
	 {195, 106},
	 {195, 102},
	 {195, 95},
	 {163, 113},
	 {163, 106},
	 {163, 102},
	 {163, 95},
	 {131, 113},
	 {131, 106},
	 {131, 102},
	 {131, 95},
	 {99, 113},
	 {99, 106},
	 {99, 102},
	 {99, 95},
	 {67, 113},
	 {67, 106},
	 {67, 102},
	 {67, 95},
	 {35, 113},
	 {35, 106},
	 {35, 102},
	 {35, 95},
	 {3, 113},
	 {3, 106},
	 {3, 102},
	 {3, 95} },		/* 2.4 GHz, lowest power */
	{
	 {251, 127},		/* 5.x GHz, highest power */
	 {251, 120},
	 {251, 114},
	 {219, 119},
	 {219, 101},
	 {187, 113},
	 {187, 102},
	 {155, 114},
	 {155, 103},
	 {123, 117},
	 {123, 107},
	 {123, 99},
	 {123, 92},
	 {91, 108},
	 {59, 125},
	 {59, 118},
	 {59, 109},
	 {59, 102},
	 {59, 96},
	 {59, 90},
	 {27, 104},
	 {27, 98},
	 {27, 92},
	 {115, 118},
	 {115, 111},
	 {115, 104},
	 {83, 126},
	 {83, 121},
	 {83, 113},
	 {83, 105},
	 {83, 99},
	 {51, 118},
	 {51, 111},
	 {51, 104},
	 {51, 98},
	 {19, 116},
	 {19, 109},
	 {19, 102},
	 {19, 98},
	 {19, 93},
	 {171, 113},
	 {171, 107},
	 {171, 99},
	 {139, 120},
	 {139, 113},
	 {139, 107},
	 {139, 99},
	 {107, 120},
	 {107, 113},
	 {107, 107},
	 {107, 99},
	 {75, 120},
	 {75, 113},
	 {75, 107},
	 {75, 99},
	 {43, 120},
	 {43, 113},
	 {43, 107},
	 {43, 99},
	 {11, 120},
	 {11, 113},
	 {11, 107},
	 {11, 99},
	 {131, 107},
	 {131, 99},
	 {99, 120},
	 {99, 113},
	 {99, 107},
	 {99, 99},
	 {67, 120},
	 {67, 113},
	 {67, 107},
	 {67, 99},
	 {35, 120},
	 {35, 113},
	 {35, 107},
	 {35, 99},
	 {3, 120} }		/* 5.x GHz, lowest power */
};

static inline u8 iwl3945_hw_reg_fix_power_index(int index)
{
	if (index < 0)
		return 0;
	if (index >= IWL_MAX_GAIN_ENTRIES)
		return IWL_MAX_GAIN_ENTRIES - 1;
	return (u8) index;
}

/* Kick off thermal recalibration check every 60 seconds */
#define REG_RECALIB_PERIOD (60)

/**
 * iwl3945_hw_reg_set_scan_power - Set Tx power for scan probe requests
 *
 * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
 * or 6 Mbit (OFDM) rates.
 */
static void iwl3945_hw_reg_set_scan_power(struct iwl3945_priv *priv, u32 scan_tbl_index,
			       s32 rate_index, const s8 *clip_pwrs,
			       struct iwl3945_channel_info *ch_info,
			       int band_index)
{
	struct iwl3945_scan_power_info *scan_power_info;
	s8 power;
	u8 power_index;

	scan_power_info = &ch_info->scan_pwr_info[scan_tbl_index];

	/* use this channel group's 6Mbit clipping/saturation pwr,
	 *   but cap at regulatory scan power restriction (set during init
	 *   based on eeprom channel data) for this channel.  */
	power = min(ch_info->scan_power, clip_pwrs[IWL_RATE_6M_INDEX_TABLE]);

	/* further limit to user's max power preference.
	 * FIXME:  Other spectrum management power limitations do not
	 *   seem to apply?? */
	power = min(power, priv->user_txpower_limit);
	scan_power_info->requested_power = power;

	/* find difference between new scan *power* and current "normal"
	 *   Tx *power* for 6Mb.  Use this difference (x2) to adjust the
	 *   current "normal" temperature-compensated Tx power *index* for
	 *   this rate (1Mb or 6Mb) to yield new temp-compensated scan power
	 *   *index*. */
	power_index = ch_info->power_info[rate_index].power_table_index
	    - (power - ch_info->power_info
	       [IWL_RATE_6M_INDEX_TABLE].requested_power) * 2;

	/* store reference index that we use when adjusting *all* scan
	 *   powers.  So we can accommodate user (all channel) or spectrum
	 *   management (single channel) power changes "between" temperature
	 *   feedback compensation procedures.
	 * don't force fit this reference index into gain table; it may be a
	 *   negative number.  This will help avoid errors when we're at
	 *   the lower bounds (highest gains, for warmest temperatures)
	 *   of the table. */

	/* don't exceed table bounds for "real" setting */
	power_index = iwl3945_hw_reg_fix_power_index(power_index);

	scan_power_info->power_table_index = power_index;
	scan_power_info->tpc.tx_gain =
	    power_gain_table[band_index][power_index].tx_gain;
	scan_power_info->tpc.dsp_atten =
	    power_gain_table[band_index][power_index].dsp_atten;
}

/**
 * iwl3945_hw_reg_send_txpower - fill in Tx Power command with gain settings
 *
 * Configures power settings for all rates for the current channel,
 * using values from channel info struct, and send to NIC
 */
int iwl3945_hw_reg_send_txpower(struct iwl3945_priv *priv)
{
	int rate_idx, i;
	const struct iwl3945_channel_info *ch_info = NULL;
	struct iwl3945_txpowertable_cmd txpower = {
		.channel = priv->active_rxon.channel,
	};

	txpower.band = (priv->band == IEEE80211_BAND_5GHZ) ? 0 : 1;
	ch_info = iwl3945_get_channel_info(priv,
				       priv->band,
				       le16_to_cpu(priv->active_rxon.channel));
	if (!ch_info) {
		IWL_ERROR
		    ("Failed to get channel info for channel %d [%d]\n",
		     le16_to_cpu(priv->active_rxon.channel), priv->band);
		return -EINVAL;
	}

	if (!is_channel_valid(ch_info)) {
		IWL_DEBUG_POWER("Not calling TX_PWR_TABLE_CMD on "
				"non-Tx channel.\n");
		return 0;
	}

	/* fill cmd with power settings for all rates for current channel */
	/* Fill OFDM rate */
	for (rate_idx = IWL_FIRST_OFDM_RATE, i = 0;
	     rate_idx <= IWL_LAST_OFDM_RATE; rate_idx++, i++) {

		txpower.power[i].tpc = ch_info->power_info[i].tpc;
		txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;

		IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
				le16_to_cpu(txpower.channel),
				txpower.band,
				txpower.power[i].tpc.tx_gain,
				txpower.power[i].tpc.dsp_atten,
				txpower.power[i].rate);
	}
	/* Fill CCK rates */
	for (rate_idx = IWL_FIRST_CCK_RATE;
	     rate_idx <= IWL_LAST_CCK_RATE; rate_idx++, i++) {
		txpower.power[i].tpc = ch_info->power_info[i].tpc;
		txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;

		IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
				le16_to_cpu(txpower.channel),
				txpower.band,
				txpower.power[i].tpc.tx_gain,
				txpower.power[i].tpc.dsp_atten,
				txpower.power[i].rate);
	}

	return iwl3945_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD,
			sizeof(struct iwl3945_txpowertable_cmd), &txpower);

}

/**
 * iwl3945_hw_reg_set_new_power - Configures power tables at new levels
 * @ch_info: Channel to update.  Uses power_info.requested_power.
 *
 * Replace requested_power and base_power_index ch_info fields for
 * one channel.
 *
 * Called if user or spectrum management changes power preferences.
 * Takes into account h/w and modulation limitations (clip power).
 *
 * This does *not* send anything to NIC, just sets up ch_info for one channel.
 *
 * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
 *	 properly fill out the scan powers, and actual h/w gain settings,
 *	 and send changes to NIC
 */
static int iwl3945_hw_reg_set_new_power(struct iwl3945_priv *priv,
			     struct iwl3945_channel_info *ch_info)
{
	struct iwl3945_channel_power_info *power_info;
	int power_changed = 0;
	int i;
	const s8 *clip_pwrs;
	int power;

	/* Get this chnlgrp's rate-to-max/clip-powers table */
	clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;

	/* Get this channel's rate-to-current-power settings table */
	power_info = ch_info->power_info;

	/* update OFDM Txpower settings */
	for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE;
	     i++, ++power_info) {
		int delta_idx;

		/* limit new power to be no more than h/w capability */
		power = min(ch_info->curr_txpow, clip_pwrs[i]);
		if (power == power_info->requested_power)
			continue;

		/* find difference between old and new requested powers,
		 *    update base (non-temp-compensated) power index */
		delta_idx = (power - power_info->requested_power) * 2;
		power_info->base_power_index -= delta_idx;

		/* save new requested power value */
		power_info->requested_power = power;

		power_changed = 1;
	}

	/* update CCK Txpower settings, based on OFDM 12M setting ...
	 *    ... all CCK power settings for a given channel are the *same*. */
	if (power_changed) {
		power =
		    ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
		    requested_power + IWL_CCK_FROM_OFDM_POWER_DIFF;

		/* do all CCK rates' iwl3945_channel_power_info structures */
		for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++) {
			power_info->requested_power = power;
			power_info->base_power_index =
			    ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
			    base_power_index + IWL_CCK_FROM_OFDM_INDEX_DIFF;
			++power_info;
		}
	}

	return 0;
}

/**
 * iwl3945_hw_reg_get_ch_txpower_limit - returns new power limit for channel
 *
 * NOTE: Returned power limit may be less (but not more) than requested,
 *	 based strictly on regulatory (eeprom and spectrum mgt) limitations
 *	 (no consideration for h/w clipping limitations).
 */
static int iwl3945_hw_reg_get_ch_txpower_limit(struct iwl3945_channel_info *ch_info)
{
	s8 max_power;

#if 0
	/* if we're using TGd limits, use lower of TGd or EEPROM */
	if (ch_info->tgd_data.max_power != 0)
		max_power = min(ch_info->tgd_data.max_power,
				ch_info->eeprom.max_power_avg);

	/* else just use EEPROM limits */
	else
#endif
		max_power = ch_info->eeprom.max_power_avg;

	return min(max_power, ch_info->max_power_avg);
}

/**
 * iwl3945_hw_reg_comp_txpower_temp - Compensate for temperature
 *
 * Compensate txpower settings of *all* channels for temperature.
 * This only accounts for the difference between current temperature
 *   and the factory calibration temperatures, and bases the new settings
 *   on the channel's base_power_index.
 *
 * If RxOn is "associated", this sends the new Txpower to NIC!
 */
static int iwl3945_hw_reg_comp_txpower_temp(struct iwl3945_priv *priv)
{
	struct iwl3945_channel_info *ch_info = NULL;
	int delta_index;
	const s8 *clip_pwrs; /* array of h/w max power levels for each rate */
	u8 a_band;
	u8 rate_index;
	u8 scan_tbl_index;
	u8 i;
	int ref_temp;
	int temperature = priv->temperature;

	/* set up new Tx power info for each and every channel, 2.4 and 5.x */
	for (i = 0; i < priv->channel_count; i++) {
		ch_info = &priv->channel_info[i];
		a_band = is_channel_a_band(ch_info);

		/* Get this chnlgrp's factory calibration temperature */
		ref_temp = (s16)priv->eeprom.groups[ch_info->group_index].
		    temperature;

		/* get power index adjustment based on curr and factory
		 * temps */
		delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
							      ref_temp);

		/* set tx power value for all rates, OFDM and CCK */
		for (rate_index = 0; rate_index < IWL_RATE_COUNT;
		     rate_index++) {
			int power_idx =
			    ch_info->power_info[rate_index].base_power_index;

			/* temperature compensate */
			power_idx += delta_index;

			/* stay within table range */
			power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
			ch_info->power_info[rate_index].
			    power_table_index = (u8) power_idx;
			ch_info->power_info[rate_index].tpc =
			    power_gain_table[a_band][power_idx];
		}

		/* Get this chnlgrp's rate-to-max/clip-powers table */
		clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;

		/* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
		for (scan_tbl_index = 0;
		     scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
			s32 actual_index = (scan_tbl_index == 0) ?
			    IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
			iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
					   actual_index, clip_pwrs,
					   ch_info, a_band);
		}
	}

	/* send Txpower command for current channel to ucode */
	return iwl3945_hw_reg_send_txpower(priv);
}

int iwl3945_hw_reg_set_txpower(struct iwl3945_priv *priv, s8 power)
{
	struct iwl3945_channel_info *ch_info;
	s8 max_power;
	u8 a_band;
	u8 i;

	if (priv->user_txpower_limit == power) {
		IWL_DEBUG_POWER("Requested Tx power same as current "
				"limit: %ddBm.\n", power);
		return 0;
	}

	IWL_DEBUG_POWER("Setting upper limit clamp to %ddBm.\n", power);
	priv->user_txpower_limit = power;

	/* set up new Tx powers for each and every channel, 2.4 and 5.x */

	for (i = 0; i < priv->channel_count; i++) {
		ch_info = &priv->channel_info[i];
		a_band = is_channel_a_band(ch_info);

		/* find minimum power of all user and regulatory constraints
		 *    (does not consider h/w clipping limitations) */
		max_power = iwl3945_hw_reg_get_ch_txpower_limit(ch_info);
		max_power = min(power, max_power);
		if (max_power != ch_info->curr_txpow) {
			ch_info->curr_txpow = max_power;

			/* this considers the h/w clipping limitations */
			iwl3945_hw_reg_set_new_power(priv, ch_info);
		}
	}

	/* update txpower settings for all channels,
	 *   send to NIC if associated. */
	is_temp_calib_needed(priv);
	iwl3945_hw_reg_comp_txpower_temp(priv);

	return 0;
}

/* will add 3945 channel switch cmd handling later */
int iwl3945_hw_channel_switch(struct iwl3945_priv *priv, u16 channel)
{
	return 0;
}

/**
 * iwl3945_reg_txpower_periodic -  called when time to check our temperature.
 *
 * -- reset periodic timer
 * -- see if temp has changed enough to warrant re-calibration ... if so:
 *     -- correct coeffs for temp (can reset temp timer)
 *     -- save this temp as "last",
 *     -- send new set of gain settings to NIC
 * NOTE:  This should continue working, even when we're not associated,
 *   so we can keep our internal table of scan powers current. */
void iwl3945_reg_txpower_periodic(struct iwl3945_priv *priv)
{
	/* This will kick in the "brute force"
	 * iwl3945_hw_reg_comp_txpower_temp() below */
	if (!is_temp_calib_needed(priv))
		goto reschedule;

	/* Set up a new set of temp-adjusted TxPowers, send to NIC.
	 * This is based *only* on current temperature,
	 * ignoring any previous power measurements */
	iwl3945_hw_reg_comp_txpower_temp(priv);

 reschedule:
	queue_delayed_work(priv->workqueue,
			   &priv->thermal_periodic, REG_RECALIB_PERIOD * HZ);
}

static void iwl3945_bg_reg_txpower_periodic(struct work_struct *work)
{
	struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv,
					     thermal_periodic.work);

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

	mutex_lock(&priv->mutex);
	iwl3945_reg_txpower_periodic(priv);
	mutex_unlock(&priv->mutex);
}

/**
 * iwl3945_hw_reg_get_ch_grp_index - find the channel-group index (0-4)
 * 				   for the channel.
 *
 * This function is used when initializing channel-info structs.
 *
 * NOTE: These channel groups do *NOT* match the bands above!
 *	 These channel groups are based on factory-tested channels;
 *	 on A-band, EEPROM's "group frequency" entries represent the top
 *	 channel in each group 1-4.  Group 5 All B/G channels are in group 0.
 */
static u16 iwl3945_hw_reg_get_ch_grp_index(struct iwl3945_priv *priv,
				       const struct iwl3945_channel_info *ch_info)
{
	struct iwl3945_eeprom_txpower_group *ch_grp = &priv->eeprom.groups[0];
	u8 group;
	u16 group_index = 0;	/* based on factory calib frequencies */
	u8 grp_channel;

	/* Find the group index for the channel ... don't use index 1(?) */
	if (is_channel_a_band(ch_info)) {
		for (group = 1; group < 5; group++) {
			grp_channel = ch_grp[group].group_channel;
			if (ch_info->channel <= grp_channel) {
				group_index = group;
				break;
			}
		}
		/* group 4 has a few channels *above* its factory cal freq */
		if (group == 5)
			group_index = 4;
	} else
		group_index = 0;	/* 2.4 GHz, group 0 */

	IWL_DEBUG_POWER("Chnl %d mapped to grp %d\n", ch_info->channel,
			group_index);
	return group_index;
}

/**
 * iwl3945_hw_reg_get_matched_power_index - Interpolate to get nominal index
 *
 * Interpolate to get nominal (i.e. at factory calibration temperature) index
 *   into radio/DSP gain settings table for requested power.
 */
static int iwl3945_hw_reg_get_matched_power_index(struct iwl3945_priv *priv,
				       s8 requested_power,
				       s32 setting_index, s32 *new_index)
{
	const struct iwl3945_eeprom_txpower_group *chnl_grp = NULL;
	s32 index0, index1;
	s32 power = 2 * requested_power;
	s32 i;
	const struct iwl3945_eeprom_txpower_sample *samples;
	s32 gains0, gains1;
	s32 res;
	s32 denominator;

	chnl_grp = &priv->eeprom.groups[setting_index];
	samples = chnl_grp->samples;
	for (i = 0; i < 5; i++) {
		if (power == samples[i].power) {
			*new_index = samples[i].gain_index;
			return 0;
		}
	}

	if (power > samples[1].power) {
		index0 = 0;
		index1 = 1;
	} else if (power > samples[2].power) {
		index0 = 1;
		index1 = 2;
	} else if (power > samples[3].power) {
		index0 = 2;
		index1 = 3;
	} else {
		index0 = 3;
		index1 = 4;
	}

	denominator = (s32) samples[index1].power - (s32) samples[index0].power;
	if (denominator == 0)
		return -EINVAL;
	gains0 = (s32) samples[index0].gain_index * (1 << 19);
	gains1 = (s32) samples[index1].gain_index * (1 << 19);
	res = gains0 + (gains1 - gains0) *
	    ((s32) power - (s32) samples[index0].power) / denominator +
	    (1 << 18);
	*new_index = res >> 19;
	return 0;
}

static void iwl3945_hw_reg_init_channel_groups(struct iwl3945_priv *priv)
{
	u32 i;
	s32 rate_index;
	const struct iwl3945_eeprom_txpower_group *group;

	IWL_DEBUG_POWER("Initializing factory calib info from EEPROM\n");

	for (i = 0; i < IWL_NUM_TX_CALIB_GROUPS; i++) {
		s8 *clip_pwrs;	/* table of power levels for each rate */
		s8 satur_pwr;	/* saturation power for each chnl group */
		group = &priv->eeprom.groups[i];

		/* sanity check on factory saturation power value */
		if (group->saturation_power < 40) {
			IWL_WARNING("Error: saturation power is %d, "
				    "less than minimum expected 40\n",
				    group->saturation_power);
			return;
		}

		/*
		 * Derive requested power levels for each rate, based on
		 *   hardware capabilities (saturation power for band).
		 * Basic value is 3dB down from saturation, with further
		 *   power reductions for highest 3 data rates.  These
		 *   backoffs provide headroom for high rate modulation
		 *   power peaks, without too much distortion (clipping).
		 */
		/* we'll fill in this array with h/w max power levels */
		clip_pwrs = (s8 *) priv->clip_groups[i].clip_powers;

		/* divide factory saturation power by 2 to find -3dB level */
		satur_pwr = (s8) (group->saturation_power >> 1);

		/* fill in channel group's nominal powers for each rate */
		for (rate_index = 0;
		     rate_index < IWL_RATE_COUNT; rate_index++, clip_pwrs++) {
			switch (rate_index) {
			case IWL_RATE_36M_INDEX_TABLE:
				if (i == 0)	/* B/G */
					*clip_pwrs = satur_pwr;
				else	/* A */
					*clip_pwrs = satur_pwr - 5;
				break;
			case IWL_RATE_48M_INDEX_TABLE:
				if (i == 0)
					*clip_pwrs = satur_pwr - 7;
				else
					*clip_pwrs = satur_pwr - 10;
				break;
			case IWL_RATE_54M_INDEX_TABLE:
				if (i == 0)
					*clip_pwrs = satur_pwr - 9;
				else
					*clip_pwrs = satur_pwr - 12;
				break;
			default:
				*clip_pwrs = satur_pwr;
				break;
			}
		}
	}
}

/**
 * iwl3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
 *
 * Second pass (during init) to set up priv->channel_info
 *
 * Set up Tx-power settings in our channel info database for each VALID
 * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
 * and current temperature.
 *
 * Since this is based on current temperature (at init time), these values may
 * not be valid for very long, but it gives us a starting/default point,
 * and allows us to active (i.e. using Tx) scan.
 *
 * This does *not* write values to NIC, just sets up our internal table.
 */
int iwl3945_txpower_set_from_eeprom(struct iwl3945_priv *priv)
{
	struct iwl3945_channel_info *ch_info = NULL;
	struct iwl3945_channel_power_info *pwr_info;
	int delta_index;
	u8 rate_index;
	u8 scan_tbl_index;
	const s8 *clip_pwrs;	/* array of power levels for each rate */
	u8 gain, dsp_atten;
	s8 power;
	u8 pwr_index, base_pwr_index, a_band;
	u8 i;
	int temperature;

	/* save temperature reference,
	 *   so we can determine next time to calibrate */
	temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
	priv->last_temperature = temperature;

	iwl3945_hw_reg_init_channel_groups(priv);

	/* initialize Tx power info for each and every channel, 2.4 and 5.x */
	for (i = 0, ch_info = priv->channel_info; i < priv->channel_count;
	     i++, ch_info++) {
		a_band = is_channel_a_band(ch_info);
		if (!is_channel_valid(ch_info))
			continue;

		/* find this channel's channel group (*not* "band") index */
		ch_info->group_index =
			iwl3945_hw_reg_get_ch_grp_index(priv, ch_info);

		/* Get this chnlgrp's rate->max/clip-powers table */
		clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;

		/* calculate power index *adjustment* value according to
		 *  diff between current temperature and factory temperature */
		delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
				priv->eeprom.groups[ch_info->group_index].
				temperature);

		IWL_DEBUG_POWER("Delta index for channel %d: %d [%d]\n",
				ch_info->channel, delta_index, temperature +
				IWL_TEMP_CONVERT);

		/* set tx power value for all OFDM rates */
		for (rate_index = 0; rate_index < IWL_OFDM_RATES;
		     rate_index++) {
			s32 power_idx;
			int rc;

			/* use channel group's clip-power table,
			 *   but don't exceed channel's max power */
			s8 pwr = min(ch_info->max_power_avg,
				     clip_pwrs[rate_index]);

			pwr_info = &ch_info->power_info[rate_index];

			/* get base (i.e. at factory-measured temperature)
			 *    power table index for this rate's power */
			rc = iwl3945_hw_reg_get_matched_power_index(priv, pwr,
							 ch_info->group_index,
							 &power_idx);
			if (rc) {
				IWL_ERROR("Invalid power index\n");
				return rc;
			}
			pwr_info->base_power_index = (u8) power_idx;

			/* temperature compensate */
			power_idx += delta_index;

			/* stay within range of gain table */
			power_idx = iwl3945_hw_reg_fix_power_index(power_idx);

			/* fill 1 OFDM rate's iwl3945_channel_power_info struct */
			pwr_info->requested_power = pwr;
			pwr_info->power_table_index = (u8) power_idx;
			pwr_info->tpc.tx_gain =
			    power_gain_table[a_band][power_idx].tx_gain;
			pwr_info->tpc.dsp_atten =
			    power_gain_table[a_band][power_idx].dsp_atten;
		}

		/* set tx power for CCK rates, based on OFDM 12 Mbit settings*/
		pwr_info = &ch_info->power_info[IWL_RATE_12M_INDEX_TABLE];
		power = pwr_info->requested_power +
			IWL_CCK_FROM_OFDM_POWER_DIFF;
		pwr_index = pwr_info->power_table_index +
			IWL_CCK_FROM_OFDM_INDEX_DIFF;
		base_pwr_index = pwr_info->base_power_index +
			IWL_CCK_FROM_OFDM_INDEX_DIFF;

		/* stay within table range */
		pwr_index = iwl3945_hw_reg_fix_power_index(pwr_index);
		gain = power_gain_table[a_band][pwr_index].tx_gain;
		dsp_atten = power_gain_table[a_band][pwr_index].dsp_atten;

		/* fill each CCK rate's iwl3945_channel_power_info structure
		 * NOTE:  All CCK-rate Txpwrs are the same for a given chnl!
		 * NOTE:  CCK rates start at end of OFDM rates! */
		for (rate_index = 0;
		     rate_index < IWL_CCK_RATES; rate_index++) {
			pwr_info = &ch_info->power_info[rate_index+IWL_OFDM_RATES];
			pwr_info->requested_power = power;
			pwr_info->power_table_index = pwr_index;
			pwr_info->base_power_index = base_pwr_index;
			pwr_info->tpc.tx_gain = gain;
			pwr_info->tpc.dsp_atten = dsp_atten;
		}

		/* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
		for (scan_tbl_index = 0;
		     scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
			s32 actual_index = (scan_tbl_index == 0) ?
				IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
			iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
				actual_index, clip_pwrs, ch_info, a_band);
		}
	}

	return 0;
}

int iwl3945_hw_rxq_stop(struct iwl3945_priv *priv)
{
	int rc;
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);
	rc = iwl3945_grab_nic_access(priv);
	if (rc) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return rc;
	}

	iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0), 0);
	rc = iwl3945_poll_direct_bit(priv, FH_RSSR_STATUS, (1 << 24), 1000);
	if (rc < 0)
		IWL_ERROR("Can't stop Rx DMA.\n");

	iwl3945_release_nic_access(priv);
	spin_unlock_irqrestore(&priv->lock, flags);

	return 0;
}

int iwl3945_hw_tx_queue_init(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
{
	int rc;
	unsigned long flags;
	int txq_id = txq->q.id;

	struct iwl3945_shared *shared_data = priv->hw_setting.shared_virt;

	shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32)txq->q.dma_addr);

	spin_lock_irqsave(&priv->lock, flags);
	rc = iwl3945_grab_nic_access(priv);
	if (rc) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return rc;
	}
	iwl3945_write_direct32(priv, FH_CBCC_CTRL(txq_id), 0);
	iwl3945_write_direct32(priv, FH_CBCC_BASE(txq_id), 0);

	iwl3945_write_direct32(priv, FH_TCSR_CONFIG(txq_id),
		ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
		ALM_FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
		ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
		ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
		ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
	iwl3945_release_nic_access(priv);

	/* fake read to flush all prev. writes */
	iwl3945_read32(priv, FH_TSSR_CBB_BASE);
	spin_unlock_irqrestore(&priv->lock, flags);

	return 0;
}

int iwl3945_hw_get_rx_read(struct iwl3945_priv *priv)
{
	struct iwl3945_shared *shared_data = priv->hw_setting.shared_virt;

	return le32_to_cpu(shared_data->rx_read_ptr[0]);
}

/**
 * iwl3945_init_hw_rate_table - Initialize the hardware rate fallback table
 */
int iwl3945_init_hw_rate_table(struct iwl3945_priv *priv)
{
	int rc, i, index, prev_index;
	struct iwl3945_rate_scaling_cmd rate_cmd = {
		.reserved = {0, 0, 0},
	};
	struct iwl3945_rate_scaling_info *table = rate_cmd.table;

	for (i = 0; i < ARRAY_SIZE(iwl3945_rates); i++) {
		index = iwl3945_rates[i].table_rs_index;

		table[index].rate_n_flags =
			iwl3945_hw_set_rate_n_flags(iwl3945_rates[i].plcp, 0);
		table[index].try_cnt = priv->retry_rate;
		prev_index = iwl3945_get_prev_ieee_rate(i);
		table[index].next_rate_index = iwl3945_rates[prev_index].table_rs_index;
	}

	switch (priv->band) {
	case IEEE80211_BAND_5GHZ:
		IWL_DEBUG_RATE("Select A mode rate scale\n");
		/* If one of the following CCK rates is used,
		 * have it fall back to the 6M OFDM rate */
		for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++)
			table[i].next_rate_index = iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;

		/* Don't fall back to CCK rates */
		table[IWL_RATE_12M_INDEX_TABLE].next_rate_index = IWL_RATE_9M_INDEX_TABLE;

		/* Don't drop out of OFDM rates */
		table[IWL_RATE_6M_INDEX_TABLE].next_rate_index =
		    iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
		break;

	case IEEE80211_BAND_2GHZ:
		IWL_DEBUG_RATE("Select B/G mode rate scale\n");
		/* If an OFDM rate is used, have it fall back to the
		 * 1M CCK rates */
		for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE; i++)
			table[i].next_rate_index = iwl3945_rates[IWL_FIRST_CCK_RATE].table_rs_index;

		/* CCK shouldn't fall back to OFDM... */
		table[IWL_RATE_11M_INDEX_TABLE].next_rate_index = IWL_RATE_5M_INDEX_TABLE;
		break;

	default:
		WARN_ON(1);
		break;
	}

	/* Update the rate scaling for control frame Tx */
	rate_cmd.table_id = 0;
	rc = iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
			      &rate_cmd);
	if (rc)
		return rc;

	/* Update the rate scaling for data frame Tx */
	rate_cmd.table_id = 1;
	return iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
				&rate_cmd);
}

/* Called when initializing driver */
int iwl3945_hw_set_hw_setting(struct iwl3945_priv *priv)
{
	memset((void *)&priv->hw_setting, 0,
	       sizeof(struct iwl3945_driver_hw_info));

	priv->hw_setting.shared_virt =
	    pci_alloc_consistent(priv->pci_dev,
				 sizeof(struct iwl3945_shared),
				 &priv->hw_setting.shared_phys);

	if (!priv->hw_setting.shared_virt) {
		IWL_ERROR("failed to allocate pci memory\n");
		mutex_unlock(&priv->mutex);
		return -ENOMEM;
	}

	priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE;
	priv->hw_setting.max_pkt_size = 2342;
	priv->hw_setting.tx_cmd_len = sizeof(struct iwl3945_tx_cmd);
	priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
	priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
	priv->hw_setting.max_stations = IWL3945_STATION_COUNT;
	priv->hw_setting.bcast_sta_id = IWL3945_BROADCAST_ID;

	priv->hw_setting.tx_ant_num = 2;
	return 0;
}

unsigned int iwl3945_hw_get_beacon_cmd(struct iwl3945_priv *priv,
			  struct iwl3945_frame *frame, u8 rate)
{
	struct iwl3945_tx_beacon_cmd *tx_beacon_cmd;
	unsigned int frame_size;

	tx_beacon_cmd = (struct iwl3945_tx_beacon_cmd *)&frame->u;
	memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));

	tx_beacon_cmd->tx.sta_id = priv->hw_setting.bcast_sta_id;
	tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;

	frame_size = iwl3945_fill_beacon_frame(priv,
				tx_beacon_cmd->frame,
				iwl3945_broadcast_addr,
				sizeof(frame->u) - sizeof(*tx_beacon_cmd));

	BUG_ON(frame_size > MAX_MPDU_SIZE);
	tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);

	tx_beacon_cmd->tx.rate = rate;
	tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
				      TX_CMD_FLG_TSF_MSK);

	/* supp_rates[0] == OFDM start at IWL_FIRST_OFDM_RATE*/
	tx_beacon_cmd->tx.supp_rates[0] =
		(IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;

	tx_beacon_cmd->tx.supp_rates[1] =
		(IWL_CCK_BASIC_RATES_MASK & 0xF);

	return (sizeof(struct iwl3945_tx_beacon_cmd) + frame_size);
}

void iwl3945_hw_rx_handler_setup(struct iwl3945_priv *priv)
{
	priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
	priv->rx_handlers[REPLY_3945_RX] = iwl3945_rx_reply_rx;
}

void iwl3945_hw_setup_deferred_work(struct iwl3945_priv *priv)
{
	INIT_DELAYED_WORK(&priv->thermal_periodic,
			  iwl3945_bg_reg_txpower_periodic);
}

void iwl3945_hw_cancel_deferred_work(struct iwl3945_priv *priv)
{
	cancel_delayed_work(&priv->thermal_periodic);
}

static struct iwl_3945_cfg iwl3945_bg_cfg = {
	.name = "3945BG",
	.fw_name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode",
	.sku = IWL_SKU_G,
};

static struct iwl_3945_cfg iwl3945_abg_cfg = {
	.name = "3945ABG",
	.fw_name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode",
	.sku = IWL_SKU_A|IWL_SKU_G,
};

struct pci_device_id iwl3945_hw_card_ids[] = {
	{IWL_PCI_DEVICE(0x4222, 0x1005, iwl3945_bg_cfg)},
	{IWL_PCI_DEVICE(0x4222, 0x1034, iwl3945_bg_cfg)},
	{IWL_PCI_DEVICE(0x4222, 0x1044, iwl3945_bg_cfg)},
	{IWL_PCI_DEVICE(0x4227, 0x1014, iwl3945_bg_cfg)},
	{IWL_PCI_DEVICE(0x4222, PCI_ANY_ID, iwl3945_abg_cfg)},
	{IWL_PCI_DEVICE(0x4227, PCI_ANY_ID, iwl3945_abg_cfg)},
	{0}
};

MODULE_DEVICE_TABLE(pci, iwl3945_hw_card_ids);