summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/p54/fwio.c
blob: 0d3d108f6fe2368af5cd0a042948558e348419af (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
/*
 * Firmware I/O code for mac80211 Prism54 drivers
 *
 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
 *
 * Based on:
 * - the islsm (softmac prism54) driver, which is:
 *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
 * - stlc45xx driver
 *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
 *
 * 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/slab.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>

#include <net/mac80211.h>

#include "p54.h"
#include "eeprom.h"
#include "lmac.h"

int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
{
	struct p54_common *priv = dev->priv;
	struct 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;
	int maxlen;

	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((__be32 *)
					     bootrec->data);
			switch (priv->fw_interface) {
			case FW_LM86:
			case FW_LM20:
			case FW_LM87: {
				char *iftype = (char *)bootrec->data;
				wiphy_info(priv->hw->wiphy,
					   "p54 detected a LM%c%c firmware\n",
					   iftype[2], iftype[3]);
				break;
				}
			case FW_FMAC:
			default:
				wiphy_err(priv->hw->wiphy,
					  "unsupported firmware\n");
				return -ENODEV;
			}
			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;
			priv->privacy_caps = desc->privacy_caps;
			priv->rx_keycache_size = desc->rx_keycache_size;
			if (le32_to_cpu(bootrec->len) == 11)
				priv->rx_mtu = le16_to_cpu(desc->rx_mtu);
			else
				priv->rx_mtu = (size_t)
					0x620 - priv->tx_hdr_len;
			maxlen = priv->tx_hdr_len + /* USB devices */
				 sizeof(struct p54_rx_data) +
				 4 + /* rx alignment */
				 IEEE80211_MAX_FRAG_THRESHOLD;
			if (priv->rx_mtu > maxlen && PAGE_SIZE == 4096) {
				printk(KERN_INFO "p54: rx_mtu reduced from %d "
				       "to %d\n", priv->rx_mtu, maxlen);
				priv->rx_mtu = maxlen;
			}
			break;
			}
		case BR_CODE_EXPOSED_IF:
			exp_if = (struct exp_if *) bootrec->data;
			for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
				if (exp_if[i].if_id == cpu_to_le16(IF_ID_LMAC))
					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) {
		wiphy_info(priv->hw->wiphy,
			   "FW rev %s - Softmac protocol %x.%x\n",
			   fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
		snprintf(dev->wiphy->fw_version, sizeof(dev->wiphy->fw_version),
				"%s - %x.%x", fw_version,
				priv->fw_var >> 8, priv->fw_var & 0xff);
	}

	if (priv->fw_var < 0x500)
		wiphy_info(priv->hw->wiphy,
			   "you are using an obsolete firmware. "
			   "visit http://wireless.kernel.org/en/users/Drivers/p54 "
			   "and grab one for \"kernel >= 2.6.28\"!\n");

	if (priv->fw_var >= 0x300) {
		/* Firmware supports QoS, use it! */

		if (priv->fw_var >= 0x500) {
			priv->tx_stats[P54_QUEUE_AC_VO].limit = 16;
			priv->tx_stats[P54_QUEUE_AC_VI].limit = 16;
			priv->tx_stats[P54_QUEUE_AC_BE].limit = 16;
			priv->tx_stats[P54_QUEUE_AC_BK].limit = 16;
		} else {
			priv->tx_stats[P54_QUEUE_AC_VO].limit = 3;
			priv->tx_stats[P54_QUEUE_AC_VI].limit = 4;
			priv->tx_stats[P54_QUEUE_AC_BE].limit = 3;
			priv->tx_stats[P54_QUEUE_AC_BK].limit = 2;
		}
		priv->hw->queues = P54_QUEUE_AC_NUM;
	}

	wiphy_info(priv->hw->wiphy,
		   "cryptographic accelerator WEP:%s, TKIP:%s, CCMP:%s\n",
		   (priv->privacy_caps & BR_DESC_PRIV_CAP_WEP) ? "YES" : "no",
		   (priv->privacy_caps &
		    (BR_DESC_PRIV_CAP_TKIP | BR_DESC_PRIV_CAP_MICHAEL))
		   ? "YES" : "no",
		   (priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)
		   ? "YES" : "no");

	if (priv->rx_keycache_size) {
		/*
		 * NOTE:
		 *
		 * The firmware provides at most 255 (0 - 254) slots
		 * for keys which are then used to offload decryption.
		 * As a result the 255 entry (aka 0xff) can be used
		 * safely by the driver to mark keys that didn't fit
		 * into the full cache. This trick saves us from
		 * keeping a extra list for uploaded keys.
		 */

		priv->used_rxkeys = kzalloc(BITS_TO_LONGS(
			priv->rx_keycache_size), GFP_KERNEL);

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

	return 0;
}
EXPORT_SYMBOL_GPL(p54_parse_firmware);

static struct sk_buff *p54_alloc_skb(struct p54_common *priv, u16 hdr_flags,
				     u16 payload_len, u16 type, gfp_t memflags)
{
	struct p54_hdr *hdr;
	struct sk_buff *skb;
	size_t frame_len = sizeof(*hdr) + payload_len;

	if (frame_len > P54_MAX_CTRL_FRAME_LEN)
		return NULL;

	if (unlikely(skb_queue_len(&priv->tx_pending) > 64))
		return NULL;

	skb = __dev_alloc_skb(priv->tx_hdr_len + frame_len, memflags);
	if (!skb)
		return NULL;
	skb_reserve(skb, priv->tx_hdr_len);

	hdr = (struct p54_hdr *) skb_put(skb, sizeof(*hdr));
	hdr->flags = cpu_to_le16(hdr_flags);
	hdr->len = cpu_to_le16(payload_len);
	hdr->type = cpu_to_le16(type);
	hdr->tries = hdr->rts_tries = 0;
	return skb;
}

int p54_download_eeprom(struct p54_common *priv, void *buf,
			u16 offset, u16 len)
{
	struct p54_eeprom_lm86 *eeprom_hdr;
	struct sk_buff *skb;
	size_t eeprom_hdr_size;
	int ret = 0;

	if (priv->fw_var >= 0x509)
		eeprom_hdr_size = sizeof(*eeprom_hdr);
	else
		eeprom_hdr_size = 0x4;

	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL, eeprom_hdr_size +
			    len, P54_CONTROL_TYPE_EEPROM_READBACK,
			    GFP_KERNEL);
	if (unlikely(!skb))
		return -ENOMEM;

	mutex_lock(&priv->eeprom_mutex);
	priv->eeprom = buf;
	eeprom_hdr = (struct p54_eeprom_lm86 *) skb_put(skb,
		eeprom_hdr_size + len);

	if (priv->fw_var < 0x509) {
		eeprom_hdr->v1.offset = cpu_to_le16(offset);
		eeprom_hdr->v1.len = cpu_to_le16(len);
	} else {
		eeprom_hdr->v2.offset = cpu_to_le32(offset);
		eeprom_hdr->v2.len = cpu_to_le16(len);
		eeprom_hdr->v2.magic2 = 0xf;
		memcpy(eeprom_hdr->v2.magic, (const char *)"LOCK", 4);
	}

	p54_tx(priv, skb);

	if (!wait_for_completion_interruptible_timeout(
	     &priv->eeprom_comp, HZ)) {
		wiphy_err(priv->hw->wiphy, "device does not respond!\n");
		ret = -EBUSY;
	}
	priv->eeprom = NULL;
	mutex_unlock(&priv->eeprom_mutex);
	return ret;
}

int p54_update_beacon_tim(struct p54_common *priv, u16 aid, bool set)
{
	struct sk_buff *skb;
	struct p54_tim *tim;

	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*tim),
			    P54_CONTROL_TYPE_TIM, GFP_ATOMIC);
	if (unlikely(!skb))
		return -ENOMEM;

	tim = (struct p54_tim *) skb_put(skb, sizeof(*tim));
	tim->count = 1;
	tim->entry[0] = cpu_to_le16(set ? (aid | 0x8000) : aid);
	p54_tx(priv, skb);
	return 0;
}

int p54_sta_unlock(struct p54_common *priv, u8 *addr)
{
	struct sk_buff *skb;
	struct p54_sta_unlock *sta;

	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*sta),
			    P54_CONTROL_TYPE_PSM_STA_UNLOCK, GFP_ATOMIC);
	if (unlikely(!skb))
		return -ENOMEM;

	sta = (struct p54_sta_unlock *)skb_put(skb, sizeof(*sta));
	memcpy(sta->addr, addr, ETH_ALEN);
	p54_tx(priv, skb);
	return 0;
}

int p54_tx_cancel(struct p54_common *priv, __le32 req_id)
{
	struct sk_buff *skb;
	struct p54_txcancel *cancel;
	u32 _req_id = le32_to_cpu(req_id);

	if (unlikely(_req_id < priv->rx_start || _req_id > priv->rx_end))
		return -EINVAL;

	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*cancel),
			    P54_CONTROL_TYPE_TXCANCEL, GFP_ATOMIC);
	if (unlikely(!skb))
		return -ENOMEM;

	cancel = (struct p54_txcancel *)skb_put(skb, sizeof(*cancel));
	cancel->req_id = req_id;
	p54_tx(priv, skb);
	return 0;
}

int p54_setup_mac(struct p54_common *priv)
{
	struct sk_buff *skb;
	struct p54_setup_mac *setup;
	u16 mode;

	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup),
			    P54_CONTROL_TYPE_SETUP, GFP_ATOMIC);
	if (!skb)
		return -ENOMEM;

	setup = (struct p54_setup_mac *) skb_put(skb, sizeof(*setup));
	if (!(priv->hw->conf.flags & IEEE80211_CONF_IDLE)) {
		switch (priv->mode) {
		case NL80211_IFTYPE_STATION:
			mode = P54_FILTER_TYPE_STATION;
			break;
		case NL80211_IFTYPE_AP:
			mode = P54_FILTER_TYPE_AP;
			break;
		case NL80211_IFTYPE_ADHOC:
		case NL80211_IFTYPE_MESH_POINT:
			mode = P54_FILTER_TYPE_IBSS;
			break;
		case NL80211_IFTYPE_MONITOR:
			mode = P54_FILTER_TYPE_PROMISCUOUS;
			break;
		default:
			mode = P54_FILTER_TYPE_HIBERNATE;
			break;
		}

		/*
		 * "TRANSPARENT and PROMISCUOUS are mutually exclusive"
		 * STSW45X0C LMAC API - page 12
		 */
		if (((priv->filter_flags & FIF_PROMISC_IN_BSS) ||
		     (priv->filter_flags & FIF_OTHER_BSS)) &&
		    (mode != P54_FILTER_TYPE_PROMISCUOUS))
			mode |= P54_FILTER_TYPE_TRANSPARENT;
	} else {
		mode = P54_FILTER_TYPE_HIBERNATE;
	}

	setup->mac_mode = cpu_to_le16(mode);
	memcpy(setup->mac_addr, priv->mac_addr, ETH_ALEN);
	memcpy(setup->bssid, priv->bssid, ETH_ALEN);
	setup->rx_antenna = 2 & priv->rx_diversity_mask; /* automatic */
	setup->rx_align = 0;
	if (priv->fw_var < 0x500) {
		setup->v1.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
		memset(setup->v1.rts_rates, 0, 8);
		setup->v1.rx_addr = cpu_to_le32(priv->rx_end);
		setup->v1.max_rx = cpu_to_le16(priv->rx_mtu);
		setup->v1.rxhw = cpu_to_le16(priv->rxhw);
		setup->v1.wakeup_timer = cpu_to_le16(priv->wakeup_timer);
		setup->v1.unalloc0 = cpu_to_le16(0);
	} else {
		setup->v2.rx_addr = cpu_to_le32(priv->rx_end);
		setup->v2.max_rx = cpu_to_le16(priv->rx_mtu);
		setup->v2.rxhw = cpu_to_le16(priv->rxhw);
		setup->v2.timer = cpu_to_le16(priv->wakeup_timer);
		setup->v2.truncate = cpu_to_le16(48896);
		setup->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
		setup->v2.sbss_offset = 0;
		setup->v2.mcast_window = 0;
		setup->v2.rx_rssi_threshold = 0;
		setup->v2.rx_ed_threshold = 0;
		setup->v2.ref_clock = cpu_to_le32(644245094);
		setup->v2.lpf_bandwidth = cpu_to_le16(65535);
		setup->v2.osc_start_delay = cpu_to_le16(65535);
	}
	p54_tx(priv, skb);
	return 0;
}

int p54_scan(struct p54_common *priv, u16 mode, u16 dwell)
{
	struct sk_buff *skb;
	struct p54_hdr *hdr;
	struct p54_scan_head *head;
	struct p54_iq_autocal_entry *iq_autocal;
	union p54_scan_body_union *body;
	struct p54_scan_tail_rate *rate;
	struct pda_rssi_cal_entry *rssi;
	struct p54_rssi_db_entry *rssi_data;
	unsigned int i;
	void *entry;
	__le16 freq = cpu_to_le16(priv->hw->conf.channel->center_freq);

	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*head) +
			    2 + sizeof(*iq_autocal) + sizeof(*body) +
			    sizeof(*rate) + 2 * sizeof(*rssi),
			    P54_CONTROL_TYPE_SCAN, GFP_ATOMIC);
	if (!skb)
		return -ENOMEM;

	head = (struct p54_scan_head *) skb_put(skb, sizeof(*head));
	memset(head->scan_params, 0, sizeof(head->scan_params));
	head->mode = cpu_to_le16(mode);
	head->dwell = cpu_to_le16(dwell);
	head->freq = freq;

	if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
		__le16 *pa_power_points = (__le16 *) skb_put(skb, 2);
		*pa_power_points = cpu_to_le16(0x0c);
	}

	iq_autocal = (void *) skb_put(skb, sizeof(*iq_autocal));
	for (i = 0; i < priv->iq_autocal_len; i++) {
		if (priv->iq_autocal[i].freq != freq)
			continue;

		memcpy(iq_autocal, &priv->iq_autocal[i].params,
		       sizeof(struct p54_iq_autocal_entry));
		break;
	}
	if (i == priv->iq_autocal_len)
		goto err;

	if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW)
		body = (void *) skb_put(skb, sizeof(body->longbow));
	else
		body = (void *) skb_put(skb, sizeof(body->normal));

	for (i = 0; i < priv->output_limit->entries; i++) {
		__le16 *entry_freq = (void *) (priv->output_limit->data +
				     priv->output_limit->entry_size * i);

		if (*entry_freq != freq)
			continue;

		if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
			memcpy(&body->longbow.power_limits,
			       (void *) entry_freq + sizeof(__le16),
			       priv->output_limit->entry_size);
		} else {
			struct pda_channel_output_limit *limits =
			       (void *) entry_freq;

			body->normal.val_barker = 0x38;
			body->normal.val_bpsk = body->normal.dup_bpsk =
				limits->val_bpsk;
			body->normal.val_qpsk = body->normal.dup_qpsk =
				limits->val_qpsk;
			body->normal.val_16qam = body->normal.dup_16qam =
				limits->val_16qam;
			body->normal.val_64qam = body->normal.dup_64qam =
				limits->val_64qam;
		}
		break;
	}
	if (i == priv->output_limit->entries)
		goto err;

	entry = (void *)(priv->curve_data->data + priv->curve_data->offset);
	for (i = 0; i < priv->curve_data->entries; i++) {
		if (*((__le16 *)entry) != freq) {
			entry += priv->curve_data->entry_size;
			continue;
		}

		if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
			memcpy(&body->longbow.curve_data,
				(void *) entry + sizeof(__le16),
				priv->curve_data->entry_size);
		} else {
			struct p54_scan_body *chan = &body->normal;
			struct pda_pa_curve_data *curve_data =
				(void *) priv->curve_data->data;

			entry += sizeof(__le16);
			chan->pa_points_per_curve = 8;
			memset(chan->curve_data, 0, sizeof(*chan->curve_data));
			memcpy(chan->curve_data, entry,
			       sizeof(struct p54_pa_curve_data_sample) *
			       min((u8)8, curve_data->points_per_channel));
		}
		break;
	}
	if (i == priv->curve_data->entries)
		goto err;

	if ((priv->fw_var >= 0x500) && (priv->fw_var < 0x509)) {
		rate = (void *) skb_put(skb, sizeof(*rate));
		rate->basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
		for (i = 0; i < sizeof(rate->rts_rates); i++)
			rate->rts_rates[i] = i;
	}

	rssi = (struct pda_rssi_cal_entry *) skb_put(skb, sizeof(*rssi));
	rssi_data = p54_rssi_find(priv, le16_to_cpu(freq));
	rssi->mul = cpu_to_le16(rssi_data->mul);
	rssi->add = cpu_to_le16(rssi_data->add);
	if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
		/* Longbow frontend needs ever more */
		rssi = (void *) skb_put(skb, sizeof(*rssi));
		rssi->mul = cpu_to_le16(rssi_data->longbow_unkn);
		rssi->add = cpu_to_le16(rssi_data->longbow_unk2);
	}

	if (priv->fw_var >= 0x509) {
		rate = (void *) skb_put(skb, sizeof(*rate));
		rate->basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
		for (i = 0; i < sizeof(rate->rts_rates); i++)
			rate->rts_rates[i] = i;
	}

	hdr = (struct p54_hdr *) skb->data;
	hdr->len = cpu_to_le16(skb->len - sizeof(*hdr));

	p54_tx(priv, skb);
	priv->cur_rssi = rssi_data;
	return 0;

err:
	wiphy_err(priv->hw->wiphy, "frequency change to channel %d failed.\n",
		  ieee80211_frequency_to_channel(
			  priv->hw->conf.channel->center_freq));

	dev_kfree_skb_any(skb);
	return -EINVAL;
}

int p54_set_leds(struct p54_common *priv)
{
	struct sk_buff *skb;
	struct p54_led *led;

	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led),
			    P54_CONTROL_TYPE_LED, GFP_ATOMIC);
	if (unlikely(!skb))
		return -ENOMEM;

	led = (struct p54_led *) skb_put(skb, sizeof(*led));
	led->flags = cpu_to_le16(0x0003);
	led->mask[0] = led->mask[1] = cpu_to_le16(priv->softled_state);
	led->delay[0] = cpu_to_le16(1);
	led->delay[1] = cpu_to_le16(0);
	p54_tx(priv, skb);
	return 0;
}

int p54_set_edcf(struct p54_common *priv)
{
	struct sk_buff *skb;
	struct p54_edcf *edcf;

	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf),
			    P54_CONTROL_TYPE_DCFINIT, GFP_ATOMIC);
	if (unlikely(!skb))
		return -ENOMEM;

	edcf = (struct p54_edcf *)skb_put(skb, sizeof(*edcf));
	if (priv->use_short_slot) {
		edcf->slottime = 9;
		edcf->sifs = 0x10;
		edcf->eofpad = 0x00;
	} else {
		edcf->slottime = 20;
		edcf->sifs = 0x0a;
		edcf->eofpad = 0x06;
	}
	/* (see prism54/isl_oid.h for further details) */
	edcf->frameburst = cpu_to_le16(0);
	edcf->round_trip_delay = cpu_to_le16(0);
	edcf->flags = 0;
	memset(edcf->mapping, 0, sizeof(edcf->mapping));
	memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue));
	p54_tx(priv, skb);
	return 0;
}

int p54_set_ps(struct p54_common *priv)
{
	struct sk_buff *skb;
	struct p54_psm *psm;
	unsigned int i;
	u16 mode;

	if (priv->hw->conf.flags & IEEE80211_CONF_PS &&
	    !priv->powersave_override)
		mode = P54_PSM | P54_PSM_BEACON_TIMEOUT | P54_PSM_DTIM |
		       P54_PSM_CHECKSUM | P54_PSM_MCBC;
	else
		mode = P54_PSM_CAM;

	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*psm),
			    P54_CONTROL_TYPE_PSM, GFP_ATOMIC);
	if (!skb)
		return -ENOMEM;

	psm = (struct p54_psm *)skb_put(skb, sizeof(*psm));
	psm->mode = cpu_to_le16(mode);
	psm->aid = cpu_to_le16(priv->aid);
	for (i = 0; i < ARRAY_SIZE(psm->intervals); i++) {
		psm->intervals[i].interval =
			cpu_to_le16(priv->hw->conf.listen_interval);
		psm->intervals[i].periods = cpu_to_le16(1);
	}

	psm->beacon_rssi_skip_max = 200;
	psm->rssi_delta_threshold = 0;
	psm->nr = 1;
	psm->exclude[0] = WLAN_EID_TIM;

	p54_tx(priv, skb);
	return 0;
}

int p54_init_xbow_synth(struct p54_common *priv)
{
	struct sk_buff *skb;
	struct p54_xbow_synth *xbow;

	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow),
			    P54_CONTROL_TYPE_XBOW_SYNTH_CFG, GFP_KERNEL);
	if (unlikely(!skb))
		return -ENOMEM;

	xbow = (struct p54_xbow_synth *)skb_put(skb, sizeof(*xbow));
	xbow->magic1 = cpu_to_le16(0x1);
	xbow->magic2 = cpu_to_le16(0x2);
	xbow->freq = cpu_to_le16(5390);
	memset(xbow->padding, 0, sizeof(xbow->padding));
	p54_tx(priv, skb);
	return 0;
}

int p54_upload_key(struct p54_common *priv, u8 algo, int slot, u8 idx, u8 len,
		   u8 *addr, u8* key)
{
	struct sk_buff *skb;
	struct p54_keycache *rxkey;

	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*rxkey),
			    P54_CONTROL_TYPE_RX_KEYCACHE, GFP_KERNEL);
	if (unlikely(!skb))
		return -ENOMEM;

	rxkey = (struct p54_keycache *)skb_put(skb, sizeof(*rxkey));
	rxkey->entry = slot;
	rxkey->key_id = idx;
	rxkey->key_type = algo;
	if (addr)
		memcpy(rxkey->mac, addr, ETH_ALEN);
	else
		memset(rxkey->mac, ~0, ETH_ALEN);

	switch (algo) {
	case P54_CRYPTO_WEP:
	case P54_CRYPTO_AESCCMP:
		rxkey->key_len = min_t(u8, 16, len);
		memcpy(rxkey->key, key, rxkey->key_len);
		break;

	case P54_CRYPTO_TKIPMICHAEL:
		rxkey->key_len = 24;
		memcpy(rxkey->key, key, 16);
		memcpy(&(rxkey->key[16]), &(key
			[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY]), 8);
		break;

	case P54_CRYPTO_NONE:
		rxkey->key_len = 0;
		memset(rxkey->key, 0, sizeof(rxkey->key));
		break;

	default:
		wiphy_err(priv->hw->wiphy,
			  "invalid cryptographic algorithm: %d\n", algo);
		dev_kfree_skb(skb);
		return -EINVAL;
	}

	p54_tx(priv, skb);
	return 0;
}

int p54_fetch_statistics(struct p54_common *priv)
{
	struct ieee80211_tx_info *txinfo;
	struct p54_tx_info *p54info;
	struct sk_buff *skb;

	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL,
			    sizeof(struct p54_statistics),
			    P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL);
	if (!skb)
		return -ENOMEM;

	/*
	 * The statistic feedback causes some extra headaches here, if it
	 * is not to crash/corrupt the firmware data structures.
	 *
	 * Unlike all other Control Get OIDs we can not use helpers like
	 * skb_put to reserve the space for the data we're requesting.
	 * Instead the extra frame length -which will hold the results later-
	 * will only be told to the p54_assign_address, so that following
	 * frames won't be placed into the  allegedly empty area.
	 */
	txinfo = IEEE80211_SKB_CB(skb);
	p54info = (void *) txinfo->rate_driver_data;
	p54info->extra_len = sizeof(struct p54_statistics);

	p54_tx(priv, skb);
	return 0;
}