aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/p54/p54common.c
blob: bac58ed03e5ca635e62b8c7522da14d05673404a (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

/*
 * Common code for mac80211 Prism54 drivers
 *
 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
 * Copyright (c) 2007, Christian Lamparter <chunkeey@web.de>
 *
 * Based on the islsm (softmac prism54) driver, which is:
 * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>

#include <net/mac80211.h>

#include "p54.h"
#include "p54common.h"

MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
MODULE_DESCRIPTION("Softmac Prism54 common code");
MODULE_LICENSE("GPL");
MODULE_ALIAS("prism54common");

static struct ieee80211_rate p54_bgrates[] = {
	{ .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
	{ .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
	{ .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
	{ .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
	{ .bitrate = 60, .hw_value = 4, },
	{ .bitrate = 90, .hw_value = 5, },
	{ .bitrate = 120, .hw_value = 6, },
	{ .bitrate = 180, .hw_value = 7, },
	{ .bitrate = 240, .hw_value = 8, },
	{ .bitrate = 360, .hw_value = 9, },
	{ .bitrate = 480, .hw_value = 10, },
	{ .bitrate = 540, .hw_value = 11, },
};

static struct ieee80211_channel p54_bgchannels[] = {
	{ .center_freq = 2412, .hw_value = 1, },
	{ .center_freq = 2417, .hw_value = 2, },
	{ .center_freq = 2422, .hw_value = 3, },
	{ .center_freq = 2427, .hw_value = 4, },
	{ .center_freq = 2432, .hw_value = 5, },
	{ .center_freq = 2437, .hw_value = 6, },
	{ .center_freq = 2442, .hw_value = 7, },
	{ .center_freq = 2447, .hw_value = 8, },
	{ .center_freq = 2452, .hw_value = 9, },
	{ .center_freq = 2457, .hw_value = 10, },
	{ .center_freq = 2462, .hw_value = 11, },
	{ .center_freq = 2467, .hw_value = 12, },
	{ .center_freq = 2472, .hw_value = 13, },
	{ .center_freq = 2484, .hw_value = 14, },
};

static struct ieee80211_supported_band band_2GHz = {
	.channels = p54_bgchannels,
	.n_channels = ARRAY_SIZE(p54_bgchannels),
	.bitrates = p54_bgrates,
	.n_bitrates = ARRAY_SIZE(p54_bgrates),
};

static struct ieee80211_rate p54_arates[] = {
	{ .bitrate = 60, .hw_value = 4, },
	{ .bitrate = 90, .hw_value = 5, },
	{ .bitrate = 120, .hw_value = 6, },
	{ .bitrate = 180, .hw_value = 7, },
	{ .bitrate = 240, .hw_value = 8, },
	{ .bitrate = 360, .hw_value = 9, },
	{ .bitrate = 480, .hw_value = 10, },
	{ .bitrate = 540, .hw_value = 11, },
};

static struct ieee80211_channel p54_achannels[] = {
	{ .center_freq = 4920 },
	{ .center_freq = 4940 },
	{ .center_freq = 4960 },
	{ .center_freq = 4980 },
	{ .center_freq = 5040 },
	{ .center_freq = 5060 },
	{ .center_freq = 5080 },
	{ .center_freq = 5170 },
	{ .center_freq = 5180 },
	{ .center_freq = 5190 },
	{ .center_freq = 5200 },
	{ .center_freq = 5210 },
	{ .center_freq = 5220 },
	{ .center_freq = 5230 },
	{ .center_freq = 5240 },
	{ .center_freq = 5260 },
	{ .center_freq = 5280 },
	{ .center_freq = 5300 },
	{ .center_freq = 5320 },
	{ .center_freq = 5500 },
	{ .center_freq = 5520 },
	{ .center_freq = 5540 },
	{ .center_freq = 5560 },
	{ .center_freq = 5580 },
	{ .center_freq = 5600 },
	{ .center_freq = 5620 },
	{ .center_freq = 5640 },
	{ .center_freq = 5660 },
	{ .center_freq = 5680 },
	{ .center_freq = 5700 },
	{ .center_freq = 5745 },
	{ .center_freq = 5765 },
	{ .center_freq = 5785 },
	{ .center_freq = 5805 },
	{ .center_freq = 5825 },
};

static struct ieee80211_supported_band band_5GHz = {
	.channels = p54_achannels,
	.n_channels = ARRAY_SIZE(p54_achannels),
	.bitrates = p54_arates,
	.n_bitrates = ARRAY_SIZE(p54_arates),
};

int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
{
	struct p54_common *priv = dev->priv;
	struct bootrec_exp_if *exp_if;
	struct bootrec *bootrec;
	u32 *data = (u32 *)fw->data;
	u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
	u8 *fw_version = NULL;
	size_t len;
	int i;

	if (priv->rx_start)
		return 0;

	while (data < end_data && *data)
		data++;

	while (data < end_data && !*data)
		data++;

	bootrec = (struct bootrec *) data;

	while (bootrec->data <= end_data &&
	       (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
		u32 code = le32_to_cpu(bootrec->code);
		switch (code) {
		case BR_CODE_COMPONENT_ID:
			priv->fw_interface = be32_to_cpup(bootrec->data);
			switch (priv->fw_interface) {
			case FW_FMAC:
				printk(KERN_INFO "p54: FreeMAC firmware\n");
				break;
			case FW_LM20:
				printk(KERN_INFO "p54: LM20 firmware\n");
				break;
			case FW_LM86:
				printk(KERN_INFO "p54: LM86 firmware\n");
				break;
			case FW_LM87:
				printk(KERN_INFO "p54: LM87 firmware\n");
				break;
			default:
				printk(KERN_INFO "p54: unknown firmware\n");
				break;
			}
			break;
		case BR_CODE_COMPONENT_VERSION:
			/* 24 bytes should be enough for all firmwares */
			if (strnlen((unsigned char*)bootrec->data, 24) < 24)
				fw_version = (unsigned char*)bootrec->data;
			break;
		case BR_CODE_DESCR: {
			struct bootrec_desc *desc =
				(struct bootrec_desc *)bootrec->data;
			priv->rx_start = le32_to_cpu(desc->rx_start);
			/* FIXME add sanity checking */
			priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
			priv->headroom = desc->headroom;
			priv->tailroom = desc->tailroom;
			if (bootrec->len == 11)
				priv->rx_mtu = (size_t) le16_to_cpu(
					(__le16)bootrec->data[10]);
			else
				priv->rx_mtu = (size_t)
					0x620 - priv->tx_hdr_len;
			break;
			}
		case BR_CODE_EXPOSED_IF:
			exp_if = (struct bootrec_exp_if *) bootrec->data;
			for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
				if (exp_if[i].if_id == cpu_to_le16(0x1a))
					priv->fw_var = le16_to_cpu(exp_if[i].variant);
			break;
		case BR_CODE_DEPENDENT_IF:
			break;
		case BR_CODE_END_OF_BRA:
		case LEGACY_BR_CODE_END_OF_BRA:
			end_data = NULL;
			break;
		default:
			break;
		}
		bootrec = (struct bootrec *)&bootrec->data[len];
	}

	if (fw_version)
		printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
			fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);

	if (priv->fw_var >= 0x300) {
		/* Firmware supports QoS, use it! */
		priv->tx_stats[4].limit = 3;
		priv->tx_stats[5].limit = 4;
		priv->tx_stats[6].limit = 3;
		priv->tx_stats[7].limit = 1;
		dev->queues = 4;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(p54_parse_firmware);

static int p54_convert_rev0(struct ieee80211_hw *dev,
			    struct pda_pa_curve_data *curve_data)
{
	struct p54_common *priv = dev->priv;
	struct p54_pa_curve_data_sample *dst;
	struct pda_pa_curve_data_sample_rev0 *src;
	size_t cd_len = sizeof(*curve_data) +
		(curve_data->points_per_channel*sizeof(*dst) + 2) *
		 curve_data->channels;
	unsigned int i, j;
	void *source, *target;

	priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
	if (!priv->curve_data)
		return -ENOMEM;

	memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
	source = curve_data->data;
	target = priv->curve_data->data;
	for (i = 0; i < curve_data->channels; i++) {
		__le16 *freq = source;
		source += sizeof(__le16);
		*((__le16 *)target) = *freq;
		target += sizeof(__le16);
		for (j = 0; j < curve_data->points_per_channel; j++) {
			dst = target;
			src = source;

			dst->rf_power = src->rf_power;
			dst->pa_detector = src->pa_detector;
			dst->data_64qam = src->pcv;
			/* "invent" the points for the other modulations */
#define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
			dst->data_16qam = SUB(src->pcv, 12);
			dst->data_qpsk = SUB(dst->data_16qam, 12);
			dst->data_bpsk = SUB(dst->data_qpsk, 12);
			dst->data_barker = SUB(dst->data_bpsk, 14);
#undef SUB
			target += sizeof(*dst);
			source += sizeof(*src);
		}
	}

	return 0;
}

static int p54_convert_rev1(struct ieee80211_hw *dev,
			    struct pda_pa_curve_data *curve_data)
{
	struct p54_common *priv = dev->priv;
	struct p54_pa_curve_data_sample *dst;
	struct pda_pa_curve_data_sample_rev1 *src;
	size_t cd_len = sizeof(*curve_data) +
		(curve_data->points_per_channel*sizeof(*dst) + 2) *
		 curve_data->channels;
	unsigned int i, j;
	void *source, *target;

	priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
	if (!priv->curve_data)
		return -ENOMEM;

	memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
	source = curve_data->data;
	target = priv->curve_data->data;
	for (i = 0; i < curve_data->channels; i++) {
		__le16 *freq = source;
		source += sizeof(__le16);
		*((__le16 *)target) = *freq;
		target += sizeof(__le16);
		for (j = 0; j < curve_data->points_per_channel; j++) {
			memcpy(target, source, sizeof(*src));

			target += sizeof(*dst);
			source += sizeof(*src);
		}
		source++;
	}

	return 0;
}

const char* p54_rf_chips[] = { "NULL", "Indigo?", "Duette",
                              "Frisbee", "Xbow", "Longbow" };
static int p54_init_xbow_synth(struct ieee80211_hw *dev);

int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
{
	struct p54_common *priv = dev->priv;
	struct eeprom_pda_wrap *wrap = NULL;
	struct pda_entry *entry;
	unsigned int data_len, entry_len;
	void *tmp;
	int err;
	u8 *end = (u8 *)eeprom + len;
	DECLARE_MAC_BUF(mac);

	wrap = (struct eeprom_pda_wrap *) eeprom;
	entry = (void *)wrap->data + le16_to_cpu(wrap->len);

	/* verify that at least the entry length/code fits */
	while ((u8 *)entry <= end - sizeof(*entry)) {
		entry_len = le16_to_cpu(entry->len);
		data_len = ((entry_len - 1) << 1);

		/* abort if entry exceeds whole structure */
		if ((u8 *)entry + sizeof(*entry) + data_len > end)
			break;

		switch (le16_to_cpu(entry->code)) {
		case PDR_MAC_ADDRESS:
			SET_IEEE80211_PERM_ADDR(dev, entry->data);
			break;
		case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
			if (data_len < 2) {
				err = -EINVAL;
				goto err;
			}

			if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
				err = -EINVAL;
				goto err;
			}

			priv->output_limit = kmalloc(entry->data[1] *
				sizeof(*priv->output_limit), GFP_KERNEL);

			if (!priv->output_limit) {
				err = -ENOMEM;
				goto err;
			}

			memcpy(priv->output_limit, &entry->data[2],
			       entry->data[1]*sizeof(*priv->output_limit));
			priv->output_limit_len = entry->data[1];
			break;
		case PDR_PRISM_PA_CAL_CURVE_DATA: {
			struct pda_pa_curve_data *curve_data =
				(struct pda_pa_curve_data *)entry->data;
			if (data_len < sizeof(*curve_data)) {
				err = -EINVAL;
				goto err;
			}

			switch (curve_data->cal_method_rev) {
			case 0:
				err = p54_convert_rev0(dev, curve_data);
				break;
			case 1:
				err = p54_convert_rev1(dev, curve_data);
				break;
			default:
				printk(KERN_ERR "p54: unknown curve data "
						"revision %d\n",
						curve_data->cal_method_rev);
				err = -ENODEV;
				break;
			}
			if (err)
				goto err;

		}
		case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
			priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
			if (!priv->iq_autocal) {
				err = -ENOMEM;
				goto err;
			}

			memcpy(priv->iq_autocal, entry->data, data_len);
			priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
			break;
		case PDR_INTERFACE_LIST:
			tmp = entry->data;
			while ((u8 *)tmp < entry->data + data_len) {
				struct bootrec_exp_if *exp_if = tmp;
				if (le16_to_cpu(exp_if->if_id) == 0xF)
					priv->rxhw = le16_to_cpu(exp_if->variant) & 0x07;
				tmp += sizeof(struct bootrec_exp_if);
			}
			break;
		case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
			priv->version = *(u8 *)(entry->data + 1);
			break;
		case PDR_END:
			/* make it overrun */
			entry_len = len;
			break;
		default:
			printk(KERN_INFO "p54: unknown eeprom code : 0x%x\n",
				le16_to_cpu(entry->code));
			break;
		}

		entry = (void *)entry + (entry_len + 1)*2;
	}

	if (!priv->iq_autocal || !priv->output_limit || !priv->curve_data) {
		printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
		err = -EINVAL;
		goto err;
	}

	switch (priv->rxhw) {
	case 4: /* XBow */
		p54_init_xbow_synth(dev);
	case 1: /* Indigo? */
	case 2: /* Duette */
		dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;
	case 3: /* Frisbee */
	case 5: /* Longbow */
		dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
		break;
	default:
		printk(KERN_ERR "%s: unsupported RF-Chip\n",
			wiphy_name(dev->wiphy));
		err = -EINVAL;
		goto err;
	}

	if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
		u8 perm_addr[ETH_ALEN];

		printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
			wiphy_name(dev->wiphy));
		random_ether_addr(perm_addr);
		SET_IEEE80211_PERM_ADDR(dev, perm_addr);
	}

	printk(KERN_INFO "%s: hwaddr %s, MAC:isl38%02x RF:%s\n",
		wiphy_name(dev->wiphy),
		print_mac(mac, dev->wiphy->perm_addr),
		priv->version, p54_rf_chips[priv->rxhw]);

	return 0;

  err:
	if (priv->iq_autocal) {
		kfree(priv->iq_autocal);
		priv->iq_autocal = NULL;
	}

	if (priv->output_limit) {
		kfree(priv->output_limit);
		priv->output_limit = NULL;
	}

	if (priv->curve_data) {
		kfree(priv->curve_data);
		priv->curve_data = NULL;
	}

	printk(KERN_ERR "p54: eeprom parse failed!\n");
	return err;
}
EXPORT_SYMBOL_GPL(p54_parse_eeprom);

static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi)
{
	/* TODO: get the rssi_add & rssi_mul data from the eeprom */
	return ((rssi * 0x83) / 64 - 400) / 4;
}

static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
{
	struct p54_common *priv = dev->priv;
	struct p54_rx_hdr *hdr = (struct p54_rx_hdr *) skb->data;
	struct ieee80211_rx_status rx_status = {0};
	u16 freq = le16_to_cpu(hdr->freq);
	size_t header_len = sizeof(*hdr);
	u32 tsf32;

	if (!(hdr->magic & cpu_to_le16(0x0001))) {
		if (priv->filter_flags & FIF_FCSFAIL)
			rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
		else
			return 0;
	}

	rx_status.signal = p54_rssi_to_dbm(dev, hdr->rssi);
	rx_status.noise = priv->noise;
	/* XX correct? */
	rx_status.qual = (100 * hdr->rssi) / 127;
	rx_status.rate_idx = hdr->rate & 0xf;
	rx_status.freq = freq;
	rx_status.band = IEEE80211_BAND_2GHZ;
	rx_status.antenna = hdr->antenna;

	tsf32 = le32_to_cpu(hdr->tsf32);
	if (tsf32 < priv->tsf_low32)
		priv->tsf_high32++;
	rx_status.mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
	priv->tsf_low32 = tsf32;

	rx_status.flag |= RX_FLAG_TSFT;

	if (hdr->magic & cpu_to_le16(0x4000))
		header_len += hdr->align[0];

	skb_pull(skb, header_len);
	skb_trim(skb, le16_to_cpu(hdr->len));

	ieee80211_rx_irqsafe(dev, skb, &rx_status);

	return -1;
}

static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
{
	struct p54_common *priv = dev->priv;
	int i;

	for (i = 0; i < dev->queues; i++)
		if (priv->tx_stats[i + 4].len < priv->tx_stats[i + 4].limit)
			ieee80211_wake_queue(dev, i);
}

static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
{
	struct p54_common *priv = dev->priv;
	struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
	struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
	struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
	u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom;
	struct memrecord *range = NULL;
	u32 freed = 0;
	u32 last_addr = priv->rx_start;
	unsigned long flags;

	spin_lock_irqsave(&priv->tx_queue.lock, flags);
	while (entry != (struct sk_buff *)&priv->tx_queue) {
		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
		range = (void *)info->driver_data;
		if (range->start_addr == addr) {
			struct p54_control_hdr *entry_hdr;
			struct p54_tx_control_allocdata *entry_data;
			int pad = 0;

			if (entry->next != (struct sk_buff *)&priv->tx_queue) {
				struct ieee80211_tx_info *ni;
				struct memrecord *mr;

				ni = IEEE80211_SKB_CB(entry->next);
				mr = (struct memrecord *)ni->driver_data;
				freed = mr->start_addr - last_addr;
			} else
				freed = priv->rx_end - last_addr;

			last_addr = range->end_addr;
			__skb_unlink(entry, &priv->tx_queue);
			spin_unlock_irqrestore(&priv->tx_queue.lock, flags);

			memset(&info->status, 0, sizeof(info->status));
			entry_hdr = (struct p54_control_hdr *) entry->data;
			entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
			if ((entry_hdr->magic1 & cpu_to_le16(0x4000)) != 0)
				pad = entry_data->align[0];

			priv->tx_stats[entry_data->hw_queue].len--;
			if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
				if (!(payload->status & 0x01))
					info->flags |= IEEE80211_TX_STAT_ACK;
				else
					info->status.excessive_retries = 1;
			}
			info->status.retry_count = payload->retries - 1;
			info->status.ack_signal = p54_rssi_to_dbm(dev,
					le16_to_cpu(payload->ack_rssi));
			skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
			ieee80211_tx_status_irqsafe(dev, entry);
			goto out;
		} else
			last_addr = range->end_addr;
		entry = entry->next;
	}
	spin_unlock_irqrestore(&priv->tx_queue.lock, flags);

out:
	if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
	    sizeof(struct p54_control_hdr))
		p54_wake_free_queues(dev);
}

static void p54_rx_eeprom_readback(struct ieee80211_hw *dev,
				   struct sk_buff *skb)
{
	struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
	struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
	struct p54_common *priv = dev->priv;

	if (!priv->eeprom)
		return ;

	memcpy(priv->eeprom, eeprom->data, eeprom->len);

	complete(&priv->eeprom_comp);
}

static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb)
{
	struct p54_common *priv = dev->priv;
	struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
	struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
	u32 tsf32 = le32_to_cpu(stats->tsf32);

	if (tsf32 < priv->tsf_low32)
		priv->tsf_high32++;
	priv->tsf_low32 = tsf32;

	priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
	priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
	priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);

	priv->noise = p54_rssi_to_dbm(dev, le32_to_cpu(stats->noise));
	complete(&priv->stats_comp);

	mod_timer(&priv->stats_timer, jiffies + 5 * HZ);
}

static int p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
{
	struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;

	switch (le16_to_cpu(hdr->type)) {
	case P54_CONTROL_TYPE_TXDONE:
		p54_rx_frame_sent(dev, skb);
		break;
	case P54_CONTROL_TYPE_BBP:
		break;
	case P54_CONTROL_TYPE_STAT_READBACK:
		p54_rx_stats(dev, skb);
		break;
	case P54_CONTROL_TYPE_EEPROM_READBACK:
		p54_rx_eeprom_readback(dev, skb);
		break;
	default:
		printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
		       wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
		break;
	}

	return 0;
}

/* returns zero if skb can be reused */
int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
{
	u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;

	if (type == 0x80)
		return p54_rx_control(dev, skb);
	else
		return p54_rx_data(dev, skb);
}
EXPORT_SYMBOL_GPL(p54_rx);

/*
 * So, the firmware is somewhat stupid and doesn't know what places in its
 * memory incoming data should go to. By poking around in the firmware, we
 * can find some unused memory to upload our packets to. However, data that we
 * want the card to TX needs to stay intact until the card has told us that
 * it is done with it. This function finds empty places we can upload to and
 * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
 * allocated areas.
 */
static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
			       struct p54_control_hdr *data, u32 len)
{
	struct p54_common *priv = dev->priv;
	struct sk_buff *entry = priv->tx_queue.next;
	struct sk_buff *target_skb = NULL;
	u32 last_addr = priv->rx_start;
	u32 largest_hole = 0;
	u32 target_addr = priv->rx_start;
	unsigned long flags;
	unsigned int left;
	len = (len + priv->headroom + priv->tailroom + 3) & ~0x3;

	spin_lock_irqsave(&priv->tx_queue.lock, flags);
	left = skb_queue_len(&priv->tx_queue);
	while (left--) {
		u32 hole_size;
		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
		struct memrecord *range = (void *)info->driver_data;
		hole_size = range->start_addr - last_addr;
		if (!target_skb && hole_size >= len) {
			target_skb = entry->prev;
			hole_size -= len;
			target_addr = last_addr;
		}
		largest_hole = max(largest_hole, hole_size);
		last_addr = range->end_addr;
		entry = entry->next;
	}
	if (!target_skb && priv->rx_end - last_addr >= len) {
		target_skb = priv->tx_queue.prev;
		largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
		if (!skb_queue_empty(&priv->tx_queue)) {
			struct ieee80211_tx_info *info = IEEE80211_SKB_CB(target_skb);
			struct memrecord *range = (void *)info->driver_data;
			target_addr = range->end_addr;
		}
	} else
		largest_hole = max(largest_hole, priv->rx_end - last_addr);

	if (skb) {
		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
		struct memrecord *range = (void *)info->driver_data;
		range->start_addr = target_addr;
		range->end_addr = target_addr + len;
		__skb_queue_after(&priv->tx_queue, target_skb, skb);
		if (largest_hole < priv->rx_mtu + priv->headroom +
				   priv->tailroom +
				   sizeof(struct p54_control_hdr))
			ieee80211_stop_queues(dev);
	}
	spin_unlock_irqrestore(&priv->tx_queue.lock, flags);

	data->req_id = cpu_to_le32(target_addr + priv->headroom);
}

int p54_read_eeprom(struct ieee80211_hw *dev)
{
	struct p54_common *priv = dev->priv;
	struct p54_control_hdr *hdr = NULL;
	struct p54_eeprom_lm86 *eeprom_hdr;
	size_t eeprom_size = 0x2020, offset = 0, blocksize;
	int ret = -ENOMEM;
	void *eeprom = NULL;

	hdr = (struct p54_control_hdr *)kzalloc(sizeof(*hdr) +
		sizeof(*eeprom_hdr) + EEPROM_READBACK_LEN, GFP_KERNEL);
	if (!hdr)
		goto free;

	priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL);
	if (!priv->eeprom)
		goto free;

	eeprom = kzalloc(eeprom_size, GFP_KERNEL);
	if (!eeprom)
		goto free;

	hdr->magic1 = cpu_to_le16(0x8000);
	hdr->type = cpu_to_le16(P54_CONTROL_TYPE_EEPROM_READBACK);
	hdr->retry1 = hdr->retry2 = 0;
	eeprom_hdr = (struct p54_eeprom_lm86 *) hdr->data;

	while (eeprom_size) {
		blocksize = min(eeprom_size, (size_t)EEPROM_READBACK_LEN);
		hdr->len = cpu_to_le16(blocksize + sizeof(*eeprom_hdr));
		eeprom_hdr->offset = cpu_to_le16(offset);
		eeprom_hdr->len = cpu_to_le16(blocksize);
		p54_assign_address(dev, NULL, hdr, hdr->len + sizeof(*hdr));
	        priv->tx(dev, hdr, hdr->len + sizeof(*hdr), 0);

		if (!wait_for_completion_interruptible_timeout(&priv->eeprom_comp, HZ)) {
			printk(KERN_ERR "%s: device does not respond!\n",
				wiphy_name(dev->wiphy));
			ret = -EBUSY;
			goto free;
	        }

		memcpy(eeprom + offset, priv->eeprom, blocksize);
		offset += blocksize;
		eeprom_size -= blocksize;
	}

	ret = p54_parse_eeprom(dev, eeprom, offset);
free:
	kfree(priv->eeprom);
	priv->eeprom = NULL;
	kfree(hdr);
	kfree(eeprom);

	return ret;
}
EXPORT_SYMBOL_GPL(p54_read_eeprom);

static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
{
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct ieee80211_tx_queue_stats *current_queue;
	struct p54_common *priv = dev->priv;
	struct p54_control_hdr *hdr;
	struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data;
	struct p54_tx_control_allocdata *txhdr;
	size_t padding, len;
	u8 rate;
	u8 cts_rate = 0x20;

	current_queue = &priv->tx_stats[skb_get_queue_mapping(skb) + 4];
	if (unlikely(current_queue->len > current_queue->limit))
		return NETDEV_TX_BUSY;
	current_queue->len++;
	current_queue->count++;
	if (current_queue->len == current_queue->limit)
		ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));

	padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
	len = skb->len;

	txhdr = (struct p54_tx_control_allocdata *)
			skb_push(skb, sizeof(*txhdr) + padding);
	hdr = (struct p54_control_hdr *) skb_push(skb, sizeof(*hdr));

	if (padding)
		hdr->magic1 = cpu_to_le16(0x4010);
	else
		hdr->magic1 = cpu_to_le16(0x0010);
	hdr->len = cpu_to_le16(len);
	hdr->type = (info->flags & IEEE80211_TX_CTL_NO_ACK) ? 0 : cpu_to_le16(1);
	hdr->retry1 = hdr->retry2 = info->control.retry_limit;

	/* TODO: add support for alternate retry TX rates */
	rate = ieee80211_get_tx_rate(dev, info)->hw_value;
	if (info->flags & IEEE80211_TX_CTL_SHORT_PREAMBLE) {
		rate |= 0x10;
		cts_rate |= 0x10;
	}
	if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
		rate |= 0x40;
		cts_rate |= ieee80211_get_rts_cts_rate(dev, info)->hw_value;
	} else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
		rate |= 0x20;
		cts_rate |= ieee80211_get_rts_cts_rate(dev, info)->hw_value;
	}
	memset(txhdr->rateset, rate, 8);
	txhdr->key_type = 0;
	txhdr->key_len = 0;
	txhdr->hw_queue = skb_get_queue_mapping(skb) + 4;
	txhdr->tx_antenna = (info->antenna_sel_tx == 0) ?
		2 : info->antenna_sel_tx - 1;
	txhdr->output_power = priv->output_power;
	txhdr->cts_rate = (info->flags & IEEE80211_TX_CTL_NO_ACK) ?
			  0 : cts_rate;
	if (padding)
		txhdr->align[0] = padding;

	/* FIXME: The sequence that follows is needed for this driver to
	 * work with mac80211 since "mac80211: fix TX sequence numbers".
	 * As with the temporary code in rt2x00, changes will be needed
	 * to get proper sequence numbers on beacons. In addition, this
	 * patch places the sequence number in the hardware state, which
	 * limits us to a single virtual state.
	 */
	if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
		if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
			priv->seqno += 0x10;
		ieee80211hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
		ieee80211hdr->seq_ctrl |= cpu_to_le16(priv->seqno);
	}
	/* modifies skb->cb and with it info, so must be last! */
	p54_assign_address(dev, skb, hdr, skb->len);

	priv->tx(dev, hdr, skb->len, 0);
	return 0;
}

static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
			  const u8 *bssid)
{
	struct p54_common *priv = dev->priv;
	struct p54_control_hdr *hdr;
	struct p54_tx_control_filter *filter;
	size_t data_len;

	hdr = kzalloc(sizeof(*hdr) + sizeof(*filter) +
		      priv->tx_hdr_len, GFP_ATOMIC);
	if (!hdr)
		return -ENOMEM;

	hdr = (void *)hdr + priv->tx_hdr_len;

	filter = (struct p54_tx_control_filter *) hdr->data;
	hdr->magic1 = cpu_to_le16(0x8001);
	hdr->type = cpu_to_le16(P54_CONTROL_TYPE_FILTER_SET);

	priv->filter_type = filter->filter_type = cpu_to_le16(filter_type);
	memcpy(filter->mac_addr, priv->mac_addr, ETH_ALEN);
	if (!bssid)
		memset(filter->bssid, ~0, ETH_ALEN);
	else
		memcpy(filter->bssid, bssid, ETH_ALEN);

	filter->rx_antenna = priv->rx_antenna;

	if (priv->fw_var < 0x500) {
		data_len = P54_TX_CONTROL_FILTER_V1_LEN;
		filter->v1.basic_rate_mask = cpu_to_le32(0x15F);
		filter->v1.rx_addr = cpu_to_le32(priv->rx_end);
		filter->v1.max_rx = cpu_to_le16(priv->rx_mtu);
		filter->v1.rxhw = cpu_to_le16(priv->rxhw);
		filter->v1.wakeup_timer = cpu_to_le16(500);
	} else {
		data_len = P54_TX_CONTROL_FILTER_V2_LEN;
		filter->v2.rx_addr = cpu_to_le32(priv->rx_end);
		filter->v2.max_rx = cpu_to_le16(priv->rx_mtu);
		filter->v2.rxhw = cpu_to_le16(priv->rxhw);
		filter->v2.timer = cpu_to_le16(1000);
	}

	hdr->len = cpu_to_le16(data_len);
	p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + data_len);
	priv->tx(dev, hdr, sizeof(*hdr) + data_len, 1);
	return 0;
}

static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
{
	struct p54_common *priv = dev->priv;
	struct p54_control_hdr *hdr;
	struct p54_tx_control_channel *chan;
	unsigned int i;
	size_t data_len;
	void *entry;

	hdr = kzalloc(sizeof(*hdr) + sizeof(*chan) +
		      priv->tx_hdr_len, GFP_KERNEL);
	if (!hdr)
		return -ENOMEM;

	hdr = (void *)hdr + priv->tx_hdr_len;

	chan = (struct p54_tx_control_channel *) hdr->data;

	hdr->magic1 = cpu_to_le16(0x8001);

	hdr->type = cpu_to_le16(P54_CONTROL_TYPE_CHANNEL_CHANGE);

	chan->flags = cpu_to_le16(0x1);
	chan->dwell = cpu_to_le16(0x0);

	for (i = 0; i < priv->iq_autocal_len; i++) {
		if (priv->iq_autocal[i].freq != freq)
			continue;

		memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
		       sizeof(*priv->iq_autocal));
		break;
	}
	if (i == priv->iq_autocal_len)
		goto err;

	for (i = 0; i < priv->output_limit_len; i++) {
		if (priv->output_limit[i].freq != freq)
			continue;

		chan->val_barker = 0x38;
		chan->val_bpsk = chan->dup_bpsk =
			priv->output_limit[i].val_bpsk;
		chan->val_qpsk = chan->dup_qpsk =
			priv->output_limit[i].val_qpsk;
		chan->val_16qam = chan->dup_16qam =
			priv->output_limit[i].val_16qam;
		chan->val_64qam = chan->dup_64qam =
			priv->output_limit[i].val_64qam;
		break;
	}
	if (i == priv->output_limit_len)
		goto err;

	entry = priv->curve_data->data;
	for (i = 0; i < priv->curve_data->channels; i++) {
		if (*((__le16 *)entry) != freq) {
			entry += sizeof(__le16);
			entry += sizeof(struct p54_pa_curve_data_sample) *
				 priv->curve_data->points_per_channel;
			continue;
		}

		entry += sizeof(__le16);
		chan->pa_points_per_curve =
			min(priv->curve_data->points_per_channel, (u8) 8);

		memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
		       chan->pa_points_per_curve);
		break;
	}

	if (priv->fw_var < 0x500) {
		data_len = P54_TX_CONTROL_CHANNEL_V1_LEN;
		chan->v1.rssical_mul = cpu_to_le16(130);
		chan->v1.rssical_add = cpu_to_le16(0xfe70);
	} else {
		data_len = P54_TX_CONTROL_CHANNEL_V2_LEN;
		chan->v2.rssical_mul = cpu_to_le16(130);
		chan->v2.rssical_add = cpu_to_le16(0xfe70);
		chan->v2.basic_rate_mask = cpu_to_le32(0x15f);
	}

	hdr->len = cpu_to_le16(data_len);
	p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + data_len);
	priv->tx(dev, hdr, sizeof(*hdr) + data_len, 1);
	return 0;

 err:
	printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
	kfree(hdr);
	return -EINVAL;
}

static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
{
	struct p54_common *priv = dev->priv;
	struct p54_control_hdr *hdr;
	struct p54_tx_control_led *led;

	hdr = kzalloc(sizeof(*hdr) + sizeof(*led) +
		      priv->tx_hdr_len, GFP_KERNEL);
	if (!hdr)
		return -ENOMEM;

	hdr = (void *)hdr + priv->tx_hdr_len;
	hdr->magic1 = cpu_to_le16(0x8001);
	hdr->len = cpu_to_le16(sizeof(*led));
	hdr->type = cpu_to_le16(P54_CONTROL_TYPE_LED);
	p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*led));

	led = (struct p54_tx_control_led *) hdr->data;
	led->mode = cpu_to_le16(mode);
	led->led_permanent = cpu_to_le16(link);
	led->led_temporary = cpu_to_le16(act);
	led->duration = cpu_to_le16(1000);

	priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*led), 1);

	return 0;
}

#define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop)	\
do {	 							\
	queue.aifs = cpu_to_le16(ai_fs);			\
	queue.cwmin = cpu_to_le16(cw_min);			\
	queue.cwmax = cpu_to_le16(cw_max);			\
	queue.txop = cpu_to_le16(_txop);			\
} while(0)

static void p54_init_vdcf(struct ieee80211_hw *dev)
{
	struct p54_common *priv = dev->priv;
	struct p54_control_hdr *hdr;
	struct p54_tx_control_vdcf *vdcf;

	/* all USB V1 adapters need a extra headroom */
	hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
	hdr->magic1 = cpu_to_le16(0x8001);
	hdr->len = cpu_to_le16(sizeof(*vdcf));
	hdr->type = cpu_to_le16(P54_CONTROL_TYPE_DCFINIT);
	hdr->req_id = cpu_to_le32(priv->rx_start);

	vdcf = (struct p54_tx_control_vdcf *) hdr->data;

	P54_SET_QUEUE(vdcf->queue[0], 0x0002, 0x0003, 0x0007, 47);
	P54_SET_QUEUE(vdcf->queue[1], 0x0002, 0x0007, 0x000f, 94);
	P54_SET_QUEUE(vdcf->queue[2], 0x0003, 0x000f, 0x03ff, 0);
	P54_SET_QUEUE(vdcf->queue[3], 0x0007, 0x000f, 0x03ff, 0);
}

static void p54_set_vdcf(struct ieee80211_hw *dev)
{
	struct p54_common *priv = dev->priv;
	struct p54_control_hdr *hdr;
	struct p54_tx_control_vdcf *vdcf;

	hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;

	p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*vdcf));

	vdcf = (struct p54_tx_control_vdcf *) hdr->data;

	if (dev->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
		vdcf->slottime = 9;
		vdcf->magic1 = 0x10;
		vdcf->magic2 = 0x00;
	} else {
		vdcf->slottime = 20;
		vdcf->magic1 = 0x0a;
		vdcf->magic2 = 0x06;
	}

	/* (see prism54/isl_oid.h for further details) */
	vdcf->frameburst = cpu_to_le16(0);

	priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*vdcf), 0);
}

static int p54_start(struct ieee80211_hw *dev)
{
	struct p54_common *priv = dev->priv;
	int err;

	if (!priv->cached_vdcf) {
		priv->cached_vdcf = kzalloc(sizeof(struct p54_tx_control_vdcf)+
			priv->tx_hdr_len + sizeof(struct p54_control_hdr),
			GFP_KERNEL);

		if (!priv->cached_vdcf)
			return -ENOMEM;
	}

	if (!priv->cached_stats) {
		priv->cached_stats = kzalloc(sizeof(struct p54_statistics) +
			priv->tx_hdr_len + sizeof(struct p54_control_hdr),
			GFP_KERNEL);

		if (!priv->cached_stats) {
			kfree(priv->cached_vdcf);
			priv->cached_vdcf = NULL;
			return -ENOMEM;
		}
	}

	err = priv->open(dev);
	if (!err)
		priv->mode = NL80211_IFTYPE_MONITOR;

	p54_init_vdcf(dev);

	mod_timer(&priv->stats_timer, jiffies + HZ);
	return err;
}

static void p54_stop(struct ieee80211_hw *dev)
{
	struct p54_common *priv = dev->priv;
	struct sk_buff *skb;

	del_timer(&priv->stats_timer);
	while ((skb = skb_dequeue(&priv->tx_queue)))
		kfree_skb(skb);
	priv->stop(dev);
	priv->tsf_high32 = priv->tsf_low32 = 0;
	priv->mode = NL80211_IFTYPE_UNSPECIFIED;
}

static int p54_add_interface(struct ieee80211_hw *dev,
			     struct ieee80211_if_init_conf *conf)
{
	struct p54_common *priv = dev->priv;

	if (priv->mode != NL80211_IFTYPE_MONITOR)
		return -EOPNOTSUPP;

	switch (conf->type) {
	case NL80211_IFTYPE_STATION:
		priv->mode = conf->type;
		break;
	default:
		return -EOPNOTSUPP;
	}

	memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);

	p54_set_filter(dev, 0, NULL);

	switch (conf->type) {
	case NL80211_IFTYPE_STATION:
		p54_set_filter(dev, 1, NULL);
		break;
	default:
		BUG();	/* impossible */
		break;
	}

	p54_set_leds(dev, 1, 0, 0);

	return 0;
}

static void p54_remove_interface(struct ieee80211_hw *dev,
				 struct ieee80211_if_init_conf *conf)
{
	struct p54_common *priv = dev->priv;
	priv->mode = NL80211_IFTYPE_MONITOR;
	memset(priv->mac_addr, 0, ETH_ALEN);
	p54_set_filter(dev, 0, NULL);
}

static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
{
	int ret;
	struct p54_common *priv = dev->priv;

	mutex_lock(&priv->conf_mutex);
	priv->rx_antenna = (conf->antenna_sel_rx == 0) ?
		2 : conf->antenna_sel_tx - 1;
	priv->output_power = conf->power_level << 2;
	ret = p54_set_freq(dev, cpu_to_le16(conf->channel->center_freq));
	p54_set_vdcf(dev);
	mutex_unlock(&priv->conf_mutex);
	return ret;
}

static int p54_config_interface(struct ieee80211_hw *dev,
				struct ieee80211_vif *vif,
				struct ieee80211_if_conf *conf)
{
	struct p54_common *priv = dev->priv;

	mutex_lock(&priv->conf_mutex);
	p54_set_filter(dev, 0, conf->bssid);
	p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
	memcpy(priv->bssid, conf->bssid, ETH_ALEN);
	mutex_unlock(&priv->conf_mutex);
	return 0;
}

static void p54_configure_filter(struct ieee80211_hw *dev,
				 unsigned int changed_flags,
				 unsigned int *total_flags,
				 int mc_count, struct dev_mc_list *mclist)
{
	struct p54_common *priv = dev->priv;

	*total_flags &= FIF_BCN_PRBRESP_PROMISC |
			FIF_PROMISC_IN_BSS |
			FIF_FCSFAIL;

	priv->filter_flags = *total_flags;

	if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
		if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
			p54_set_filter(dev, priv->filter_type, NULL);
		else
			p54_set_filter(dev, priv->filter_type, priv->bssid);
	}

	if (changed_flags & FIF_PROMISC_IN_BSS) {
		if (*total_flags & FIF_PROMISC_IN_BSS)
			p54_set_filter(dev, priv->filter_type |
				cpu_to_le16(0x8), NULL);
		else
			p54_set_filter(dev, priv->filter_type &
				~cpu_to_le16(0x8), priv->bssid);
	}
}

static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
		       const struct ieee80211_tx_queue_params *params)
{
	struct p54_common *priv = dev->priv;
	struct p54_tx_control_vdcf *vdcf;

	vdcf = (struct p54_tx_control_vdcf *)(((struct p54_control_hdr *)
		((void *)priv->cached_vdcf + priv->tx_hdr_len))->data);

	if ((params) && !(queue > 4)) {
		P54_SET_QUEUE(vdcf->queue[queue], params->aifs,
			params->cw_min, params->cw_max, params->txop);
	} else
		return -EINVAL;

	p54_set_vdcf(dev);

	return 0;
}

static int p54_init_xbow_synth(struct ieee80211_hw *dev)
{
	struct p54_common *priv = dev->priv;
	struct p54_control_hdr *hdr;
	struct p54_tx_control_xbow_synth *xbow;

	hdr = kzalloc(sizeof(*hdr) + sizeof(*xbow) +
		      priv->tx_hdr_len, GFP_KERNEL);
	if (!hdr)
		return -ENOMEM;

	hdr = (void *)hdr + priv->tx_hdr_len;
	hdr->magic1 = cpu_to_le16(0x8001);
	hdr->len = cpu_to_le16(sizeof(*xbow));
	hdr->type = cpu_to_le16(P54_CONTROL_TYPE_XBOW_SYNTH_CFG);
	p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*xbow));

	xbow = (struct p54_tx_control_xbow_synth *) hdr->data;
	xbow->magic1 = cpu_to_le16(0x1);
	xbow->magic2 = cpu_to_le16(0x2);
	xbow->freq = cpu_to_le16(5390);

	priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*xbow), 1);

	return 0;
}

static void p54_statistics_timer(unsigned long data)
{
	struct ieee80211_hw *dev = (struct ieee80211_hw *) data;
	struct p54_common *priv = dev->priv;
	struct p54_control_hdr *hdr;
	struct p54_statistics *stats;

	BUG_ON(!priv->cached_stats);

	hdr = (void *)priv->cached_stats + priv->tx_hdr_len;
	hdr->magic1 = cpu_to_le16(0x8000);
	hdr->len = cpu_to_le16(sizeof(*stats));
	hdr->type = cpu_to_le16(P54_CONTROL_TYPE_STAT_READBACK);
	p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*stats));

	priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*stats), 0);
}

static int p54_get_stats(struct ieee80211_hw *dev,
			 struct ieee80211_low_level_stats *stats)
{
	struct p54_common *priv = dev->priv;

	del_timer(&priv->stats_timer);
	p54_statistics_timer((unsigned long)dev);

	if (!wait_for_completion_interruptible_timeout(&priv->stats_comp, HZ)) {
		printk(KERN_ERR "%s: device does not respond!\n",
			wiphy_name(dev->wiphy));
		return -EBUSY;
	}

	memcpy(stats, &priv->stats, sizeof(*stats));

	return 0;
}

static int p54_get_tx_stats(struct ieee80211_hw *dev,
			    struct ieee80211_tx_queue_stats *stats)
{
	struct p54_common *priv = dev->priv;

	memcpy(stats, &priv->tx_stats[4], sizeof(stats[0]) * dev->queues);

	return 0;
}

static const struct ieee80211_ops p54_ops = {
	.tx			= p54_tx,
	.start			= p54_start,
	.stop			= p54_stop,
	.add_interface		= p54_add_interface,
	.remove_interface	= p54_remove_interface,
	.config			= p54_config,
	.config_interface	= p54_config_interface,
	.configure_filter	= p54_configure_filter,
	.conf_tx		= p54_conf_tx,
	.get_stats		= p54_get_stats,
	.get_tx_stats		= p54_get_tx_stats
};

struct ieee80211_hw *p54_init_common(size_t priv_data_len)
{
	struct ieee80211_hw *dev;
	struct p54_common *priv;

	dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
	if (!dev)
		return NULL;

	priv = dev->priv;
	priv->mode = NL80211_IFTYPE_UNSPECIFIED;
	skb_queue_head_init(&priv->tx_queue);
	dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
		     IEEE80211_HW_RX_INCLUDES_FCS |
		     IEEE80211_HW_SIGNAL_DBM |
		     IEEE80211_HW_NOISE_DBM;

	dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);

	dev->channel_change_time = 1000;	/* TODO: find actual value */

	priv->tx_stats[0].limit = 1;
	priv->tx_stats[1].limit = 1;
	priv->tx_stats[2].limit = 1;
	priv->tx_stats[3].limit = 1;
	priv->tx_stats[4].limit = 5;
	dev->queues = 1;
	priv->noise = -94;
	dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
				 sizeof(struct p54_tx_control_allocdata);

	mutex_init(&priv->conf_mutex);
	init_completion(&priv->eeprom_comp);
	init_completion(&priv->stats_comp);
	setup_timer(&priv->stats_timer, p54_statistics_timer,
		(unsigned long)dev);

	return dev;
}
EXPORT_SYMBOL_GPL(p54_init_common);

void p54_free_common(struct ieee80211_hw *dev)
{
	struct p54_common *priv = dev->priv;
	kfree(priv->cached_stats);
	kfree(priv->iq_autocal);
	kfree(priv->output_limit);
	kfree(priv->curve_data);
	kfree(priv->cached_vdcf);
}
EXPORT_SYMBOL_GPL(p54_free_common);

static int __init p54_init(void)
{
	return 0;
}

static void __exit p54_exit(void)
{
}

module_init(p54_init);
module_exit(p54_exit);