1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Firmware I/O code for mac80211 Prism54 drivers
4  *
5  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
6  * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
7  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
8  *
9  * Based on:
10  * - the islsm (softmac prism54) driver, which is:
11  *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
12  * - stlc45xx driver
13  *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
14  */
15 
16 #include <linux/slab.h>
17 #include <linux/firmware.h>
18 #include <linux/etherdevice.h>
19 #include <linux/export.h>
20 
21 #include <net/mac80211.h>
22 
23 #include "p54.h"
24 #include "eeprom.h"
25 #include "lmac.h"
26 
27 int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
28 {
29 	struct p54_common *priv = dev->priv;
30 	struct exp_if *exp_if;
31 	struct bootrec *bootrec;
32 	u32 *data = (u32 *)fw->data;
33 	u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
34 	u8 *fw_version = NULL;
35 	size_t len;
36 	int i;
37 	int maxlen;
38 
39 	if (priv->rx_start)
40 		return 0;
41 
42 	while (data < end_data && *data)
43 		data++;
44 
45 	while (data < end_data && !*data)
46 		data++;
47 
48 	bootrec = (struct bootrec *) data;
49 
50 	while (bootrec->data <= end_data && (bootrec->data +
51 	       (len = le32_to_cpu(bootrec->len))) <= end_data) {
52 		u32 code = le32_to_cpu(bootrec->code);
53 		switch (code) {
54 		case BR_CODE_COMPONENT_ID:
55 			priv->fw_interface = be32_to_cpup((__be32 *)
56 					     bootrec->data);
57 			switch (priv->fw_interface) {
58 			case FW_LM86:
59 			case FW_LM20:
60 			case FW_LM87: {
61 				char *iftype = (char *)bootrec->data;
62 				wiphy_info(priv->hw->wiphy,
63 					   "p54 detected a LM%c%c firmware\n",
64 					   iftype[2], iftype[3]);
65 				break;
66 				}
67 			case FW_FMAC:
68 			default:
69 				wiphy_err(priv->hw->wiphy,
70 					  "unsupported firmware\n");
71 				return -ENODEV;
72 			}
73 			break;
74 		case BR_CODE_COMPONENT_VERSION:
75 			/* 24 bytes should be enough for all firmwares */
76 			if (strnlen((unsigned char *) bootrec->data, 24) < 24)
77 				fw_version = (unsigned char *) bootrec->data;
78 			break;
79 		case BR_CODE_DESCR: {
80 			struct bootrec_desc *desc =
81 				(struct bootrec_desc *)bootrec->data;
82 			priv->rx_start = le32_to_cpu(desc->rx_start);
83 			/* FIXME add sanity checking */
84 			priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
85 			priv->headroom = desc->headroom;
86 			priv->tailroom = desc->tailroom;
87 			priv->privacy_caps = desc->privacy_caps;
88 			priv->rx_keycache_size = desc->rx_keycache_size;
89 			if (le32_to_cpu(bootrec->len) == 11)
90 				priv->rx_mtu = le16_to_cpu(desc->rx_mtu);
91 			else
92 				priv->rx_mtu = (size_t)
93 					0x620 - priv->tx_hdr_len;
94 			maxlen = priv->tx_hdr_len + /* USB devices */
95 				 sizeof(struct p54_rx_data) +
96 				 4 + /* rx alignment */
97 				 IEEE80211_MAX_FRAG_THRESHOLD;
98 			if (priv->rx_mtu > maxlen && PAGE_SIZE == 4096) {
99 				printk(KERN_INFO "p54: rx_mtu reduced from %d "
100 				       "to %d\n", priv->rx_mtu, maxlen);
101 				priv->rx_mtu = maxlen;
102 			}
103 			break;
104 			}
105 		case BR_CODE_EXPOSED_IF:
106 			exp_if = (struct exp_if *) bootrec->data;
107 			for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
108 				if (exp_if[i].if_id == cpu_to_le16(IF_ID_LMAC))
109 					priv->fw_var = le16_to_cpu(exp_if[i].variant);
110 			break;
111 		case BR_CODE_DEPENDENT_IF:
112 			break;
113 		case BR_CODE_END_OF_BRA:
114 		case LEGACY_BR_CODE_END_OF_BRA:
115 			end_data = NULL;
116 			break;
117 		default:
118 			break;
119 		}
120 		bootrec = (struct bootrec *)&bootrec->data[len];
121 	}
122 
123 	if (fw_version) {
124 		wiphy_info(priv->hw->wiphy,
125 			   "FW rev %s - Softmac protocol %x.%x\n",
126 			   fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
127 		snprintf(dev->wiphy->fw_version, sizeof(dev->wiphy->fw_version),
128 				"%s - %x.%x", fw_version,
129 				priv->fw_var >> 8, priv->fw_var & 0xff);
130 	}
131 
132 	if (priv->fw_var < 0x500)
133 		wiphy_info(priv->hw->wiphy,
134 			   "you are using an obsolete firmware. "
135 			   "visit http://wireless.wiki.kernel.org/en/users/Drivers/p54 "
136 			   "and grab one for \"kernel >= 2.6.28\"!\n");
137 
138 	if (priv->fw_var >= 0x300) {
139 		/* Firmware supports QoS, use it! */
140 
141 		if (priv->fw_var >= 0x500) {
142 			priv->tx_stats[P54_QUEUE_AC_VO].limit = 16;
143 			priv->tx_stats[P54_QUEUE_AC_VI].limit = 16;
144 			priv->tx_stats[P54_QUEUE_AC_BE].limit = 16;
145 			priv->tx_stats[P54_QUEUE_AC_BK].limit = 16;
146 		} else {
147 			priv->tx_stats[P54_QUEUE_AC_VO].limit = 3;
148 			priv->tx_stats[P54_QUEUE_AC_VI].limit = 4;
149 			priv->tx_stats[P54_QUEUE_AC_BE].limit = 3;
150 			priv->tx_stats[P54_QUEUE_AC_BK].limit = 2;
151 		}
152 		priv->hw->queues = P54_QUEUE_AC_NUM;
153 	}
154 
155 	wiphy_info(priv->hw->wiphy,
156 		   "cryptographic accelerator WEP:%s, TKIP:%s, CCMP:%s\n",
157 		   (priv->privacy_caps & BR_DESC_PRIV_CAP_WEP) ? "YES" : "no",
158 		   (priv->privacy_caps &
159 		    (BR_DESC_PRIV_CAP_TKIP | BR_DESC_PRIV_CAP_MICHAEL))
160 		   ? "YES" : "no",
161 		   (priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)
162 		   ? "YES" : "no");
163 
164 	if (priv->rx_keycache_size) {
165 		/*
166 		 * NOTE:
167 		 *
168 		 * The firmware provides at most 255 (0 - 254) slots
169 		 * for keys which are then used to offload decryption.
170 		 * As a result the 255 entry (aka 0xff) can be used
171 		 * safely by the driver to mark keys that didn't fit
172 		 * into the full cache. This trick saves us from
173 		 * keeping a extra list for uploaded keys.
174 		 */
175 
176 		priv->used_rxkeys = bitmap_zalloc(priv->rx_keycache_size,
177 						  GFP_KERNEL);
178 		if (!priv->used_rxkeys)
179 			return -ENOMEM;
180 	}
181 
182 	return 0;
183 }
184 EXPORT_SYMBOL_GPL(p54_parse_firmware);
185 
186 static struct sk_buff *p54_alloc_skb(struct p54_common *priv, u16 hdr_flags,
187 				     u16 payload_len, u16 type, gfp_t memflags)
188 {
189 	struct p54_hdr *hdr;
190 	struct sk_buff *skb;
191 	size_t frame_len = sizeof(*hdr) + payload_len;
192 
193 	if (frame_len > P54_MAX_CTRL_FRAME_LEN)
194 		return NULL;
195 
196 	if (unlikely(skb_queue_len(&priv->tx_pending) > 64))
197 		return NULL;
198 
199 	skb = __dev_alloc_skb(priv->tx_hdr_len + frame_len, memflags);
200 	if (!skb)
201 		return NULL;
202 	skb_reserve(skb, priv->tx_hdr_len);
203 
204 	hdr = skb_put(skb, sizeof(*hdr));
205 	hdr->flags = cpu_to_le16(hdr_flags);
206 	hdr->len = cpu_to_le16(payload_len);
207 	hdr->type = cpu_to_le16(type);
208 	hdr->tries = hdr->rts_tries = 0;
209 	return skb;
210 }
211 
212 int p54_download_eeprom(struct p54_common *priv, void *buf,
213 			u16 offset, u16 len)
214 {
215 	struct p54_eeprom_lm86 *eeprom_hdr;
216 	struct sk_buff *skb;
217 	size_t eeprom_hdr_size;
218 	int ret = 0;
219 	long timeout;
220 
221 	if (priv->fw_var >= 0x509)
222 		eeprom_hdr_size = sizeof(*eeprom_hdr);
223 	else
224 		eeprom_hdr_size = 0x4;
225 
226 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL, eeprom_hdr_size +
227 			    len, P54_CONTROL_TYPE_EEPROM_READBACK,
228 			    GFP_KERNEL);
229 	if (unlikely(!skb))
230 		return -ENOMEM;
231 
232 	mutex_lock(&priv->eeprom_mutex);
233 	priv->eeprom = buf;
234 	eeprom_hdr = skb_put(skb, eeprom_hdr_size + len);
235 
236 	if (priv->fw_var < 0x509) {
237 		eeprom_hdr->v1.offset = cpu_to_le16(offset);
238 		eeprom_hdr->v1.len = cpu_to_le16(len);
239 	} else {
240 		eeprom_hdr->v2.offset = cpu_to_le32(offset);
241 		eeprom_hdr->v2.len = cpu_to_le16(len);
242 		eeprom_hdr->v2.magic2 = 0xf;
243 		memcpy(eeprom_hdr->v2.magic, (const char *)"LOCK", 4);
244 	}
245 
246 	p54_tx(priv, skb);
247 
248 	timeout = wait_for_completion_interruptible_timeout(
249 			&priv->eeprom_comp, HZ);
250 	if (timeout <= 0) {
251 		wiphy_err(priv->hw->wiphy,
252 			"device does not respond or signal received!\n");
253 		ret = -EBUSY;
254 	}
255 	priv->eeprom = NULL;
256 	mutex_unlock(&priv->eeprom_mutex);
257 	return ret;
258 }
259 
260 int p54_update_beacon_tim(struct p54_common *priv, u16 aid, bool set)
261 {
262 	struct sk_buff *skb;
263 	struct p54_tim *tim;
264 
265 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*tim),
266 			    P54_CONTROL_TYPE_TIM, GFP_ATOMIC);
267 	if (unlikely(!skb))
268 		return -ENOMEM;
269 
270 	tim = skb_put(skb, sizeof(*tim));
271 	tim->count = 1;
272 	tim->entry[0] = cpu_to_le16(set ? (aid | 0x8000) : aid);
273 	p54_tx(priv, skb);
274 	return 0;
275 }
276 
277 int p54_sta_unlock(struct p54_common *priv, u8 *addr)
278 {
279 	struct sk_buff *skb;
280 	struct p54_sta_unlock *sta;
281 
282 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*sta),
283 			    P54_CONTROL_TYPE_PSM_STA_UNLOCK, GFP_ATOMIC);
284 	if (unlikely(!skb))
285 		return -ENOMEM;
286 
287 	sta = skb_put(skb, sizeof(*sta));
288 	memcpy(sta->addr, addr, ETH_ALEN);
289 	p54_tx(priv, skb);
290 	return 0;
291 }
292 
293 int p54_tx_cancel(struct p54_common *priv, __le32 req_id)
294 {
295 	struct sk_buff *skb;
296 	struct p54_txcancel *cancel;
297 	u32 _req_id = le32_to_cpu(req_id);
298 
299 	if (unlikely(_req_id < priv->rx_start || _req_id > priv->rx_end))
300 		return -EINVAL;
301 
302 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*cancel),
303 			    P54_CONTROL_TYPE_TXCANCEL, GFP_ATOMIC);
304 	if (unlikely(!skb))
305 		return -ENOMEM;
306 
307 	cancel = skb_put(skb, sizeof(*cancel));
308 	cancel->req_id = req_id;
309 	p54_tx(priv, skb);
310 	return 0;
311 }
312 
313 int p54_setup_mac(struct p54_common *priv)
314 {
315 	struct sk_buff *skb;
316 	struct p54_setup_mac *setup;
317 	u16 mode;
318 
319 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup),
320 			    P54_CONTROL_TYPE_SETUP, GFP_ATOMIC);
321 	if (!skb)
322 		return -ENOMEM;
323 
324 	setup = skb_put(skb, sizeof(*setup));
325 	if (!(priv->hw->conf.flags & IEEE80211_CONF_IDLE)) {
326 		switch (priv->mode) {
327 		case NL80211_IFTYPE_STATION:
328 			mode = P54_FILTER_TYPE_STATION;
329 			break;
330 		case NL80211_IFTYPE_AP:
331 			mode = P54_FILTER_TYPE_AP;
332 			break;
333 		case NL80211_IFTYPE_ADHOC:
334 		case NL80211_IFTYPE_MESH_POINT:
335 			mode = P54_FILTER_TYPE_IBSS;
336 			break;
337 		case NL80211_IFTYPE_MONITOR:
338 			mode = P54_FILTER_TYPE_PROMISCUOUS;
339 			break;
340 		default:
341 			mode = P54_FILTER_TYPE_HIBERNATE;
342 			break;
343 		}
344 
345 		/*
346 		 * "TRANSPARENT and PROMISCUOUS are mutually exclusive"
347 		 * STSW45X0C LMAC API - page 12
348 		 */
349 		if (priv->filter_flags & FIF_OTHER_BSS &&
350 		    (mode != P54_FILTER_TYPE_PROMISCUOUS))
351 			mode |= P54_FILTER_TYPE_TRANSPARENT;
352 	} else {
353 		mode = P54_FILTER_TYPE_HIBERNATE;
354 	}
355 
356 	setup->mac_mode = cpu_to_le16(mode);
357 	memcpy(setup->mac_addr, priv->mac_addr, ETH_ALEN);
358 	memcpy(setup->bssid, priv->bssid, ETH_ALEN);
359 	setup->rx_antenna = 2 & priv->rx_diversity_mask; /* automatic */
360 	setup->rx_align = 0;
361 	if (priv->fw_var < 0x500) {
362 		setup->v1.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
363 		memset(setup->v1.rts_rates, 0, 8);
364 		setup->v1.rx_addr = cpu_to_le32(priv->rx_end);
365 		setup->v1.max_rx = cpu_to_le16(priv->rx_mtu);
366 		setup->v1.rxhw = cpu_to_le16(priv->rxhw);
367 		setup->v1.wakeup_timer = cpu_to_le16(priv->wakeup_timer);
368 		setup->v1.unalloc0 = cpu_to_le16(0);
369 	} else {
370 		setup->v2.rx_addr = cpu_to_le32(priv->rx_end);
371 		setup->v2.max_rx = cpu_to_le16(priv->rx_mtu);
372 		setup->v2.rxhw = cpu_to_le16(priv->rxhw);
373 		setup->v2.timer = cpu_to_le16(priv->wakeup_timer);
374 		setup->v2.truncate = cpu_to_le16(48896);
375 		setup->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
376 		setup->v2.sbss_offset = 0;
377 		setup->v2.mcast_window = 0;
378 		setup->v2.rx_rssi_threshold = 0;
379 		setup->v2.rx_ed_threshold = 0;
380 		setup->v2.ref_clock = cpu_to_le32(644245094);
381 		setup->v2.lpf_bandwidth = cpu_to_le16(65535);
382 		setup->v2.osc_start_delay = cpu_to_le16(65535);
383 	}
384 	p54_tx(priv, skb);
385 	priv->phy_idle = mode == P54_FILTER_TYPE_HIBERNATE;
386 	return 0;
387 }
388 
389 int p54_scan(struct p54_common *priv, u16 mode, u16 dwell)
390 {
391 	struct sk_buff *skb;
392 	struct p54_hdr *hdr;
393 	struct p54_scan_head *head;
394 	struct p54_iq_autocal_entry *iq_autocal;
395 	union p54_scan_body_union *body;
396 	struct p54_scan_tail_rate *rate;
397 	struct pda_rssi_cal_entry *rssi;
398 	struct p54_rssi_db_entry *rssi_data;
399 	unsigned int i;
400 	void *entry;
401 	__le16 freq = cpu_to_le16(priv->hw->conf.chandef.chan->center_freq);
402 
403 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*head) +
404 			    2 + sizeof(*iq_autocal) + sizeof(*body) +
405 			    sizeof(*rate) + 2 * sizeof(*rssi),
406 			    P54_CONTROL_TYPE_SCAN, GFP_ATOMIC);
407 	if (!skb)
408 		return -ENOMEM;
409 
410 	head = skb_put(skb, sizeof(*head));
411 	memset(head->scan_params, 0, sizeof(head->scan_params));
412 	head->mode = cpu_to_le16(mode);
413 	head->dwell = cpu_to_le16(dwell);
414 	head->freq = freq;
415 
416 	if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
417 		__le16 *pa_power_points = skb_put(skb, 2);
418 		*pa_power_points = cpu_to_le16(0x0c);
419 	}
420 
421 	iq_autocal = skb_put(skb, sizeof(*iq_autocal));
422 	for (i = 0; i < priv->iq_autocal_len; i++) {
423 		if (priv->iq_autocal[i].freq != freq)
424 			continue;
425 
426 		memcpy(iq_autocal, &priv->iq_autocal[i].params,
427 		       sizeof(struct p54_iq_autocal_entry));
428 		break;
429 	}
430 	if (i == priv->iq_autocal_len)
431 		goto err;
432 
433 	if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW)
434 		body = skb_put(skb, sizeof(body->longbow));
435 	else
436 		body = skb_put(skb, sizeof(body->normal));
437 
438 	for (i = 0; i < priv->output_limit->entries; i++) {
439 		__le16 *entry_freq = (void *) (priv->output_limit->data +
440 				     priv->output_limit->entry_size * i);
441 
442 		if (*entry_freq != freq)
443 			continue;
444 
445 		if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
446 			memcpy(&body->longbow.power_limits,
447 			       (void *) entry_freq + sizeof(__le16),
448 			       priv->output_limit->entry_size);
449 		} else {
450 			struct pda_channel_output_limit *limits =
451 			       (void *) entry_freq;
452 
453 			body->normal.val_barker = 0x38;
454 			body->normal.val_bpsk = body->normal.dup_bpsk =
455 				limits->val_bpsk;
456 			body->normal.val_qpsk = body->normal.dup_qpsk =
457 				limits->val_qpsk;
458 			body->normal.val_16qam = body->normal.dup_16qam =
459 				limits->val_16qam;
460 			body->normal.val_64qam = body->normal.dup_64qam =
461 				limits->val_64qam;
462 		}
463 		break;
464 	}
465 	if (i == priv->output_limit->entries)
466 		goto err;
467 
468 	entry = (void *)(priv->curve_data->data + priv->curve_data->offset);
469 	for (i = 0; i < priv->curve_data->entries; i++) {
470 		if (*((__le16 *)entry) != freq) {
471 			entry += priv->curve_data->entry_size;
472 			continue;
473 		}
474 
475 		if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
476 			memcpy(&body->longbow.curve_data,
477 				entry + sizeof(__le16),
478 				priv->curve_data->entry_size);
479 		} else {
480 			struct p54_scan_body *chan = &body->normal;
481 			struct pda_pa_curve_data *curve_data =
482 				(void *) priv->curve_data->data;
483 
484 			entry += sizeof(__le16);
485 			chan->pa_points_per_curve = 8;
486 			memset(chan->curve_data, 0, sizeof(chan->curve_data));
487 			memcpy(chan->curve_data, entry,
488 			       sizeof(struct p54_pa_curve_data_sample) *
489 			       min((u8)8, curve_data->points_per_channel));
490 		}
491 		break;
492 	}
493 	if (i == priv->curve_data->entries)
494 		goto err;
495 
496 	if ((priv->fw_var >= 0x500) && (priv->fw_var < 0x509)) {
497 		rate = skb_put(skb, sizeof(*rate));
498 		rate->basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
499 		for (i = 0; i < sizeof(rate->rts_rates); i++)
500 			rate->rts_rates[i] = i;
501 	}
502 
503 	rssi = skb_put(skb, sizeof(*rssi));
504 	rssi_data = p54_rssi_find(priv, le16_to_cpu(freq));
505 	rssi->mul = cpu_to_le16(rssi_data->mul);
506 	rssi->add = cpu_to_le16(rssi_data->add);
507 	if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
508 		/* Longbow frontend needs ever more */
509 		rssi = skb_put(skb, sizeof(*rssi));
510 		rssi->mul = cpu_to_le16(rssi_data->longbow_unkn);
511 		rssi->add = cpu_to_le16(rssi_data->longbow_unk2);
512 	}
513 
514 	if (priv->fw_var >= 0x509) {
515 		rate = skb_put(skb, sizeof(*rate));
516 		rate->basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
517 		for (i = 0; i < sizeof(rate->rts_rates); i++)
518 			rate->rts_rates[i] = i;
519 	}
520 
521 	hdr = (struct p54_hdr *) skb->data;
522 	hdr->len = cpu_to_le16(skb->len - sizeof(*hdr));
523 
524 	p54_tx(priv, skb);
525 	priv->cur_rssi = rssi_data;
526 	return 0;
527 
528 err:
529 	wiphy_err(priv->hw->wiphy, "frequency change to channel %d failed.\n",
530 		  ieee80211_frequency_to_channel(
531 			  priv->hw->conf.chandef.chan->center_freq));
532 
533 	dev_kfree_skb_any(skb);
534 	return -EINVAL;
535 }
536 
537 int p54_set_leds(struct p54_common *priv)
538 {
539 	struct sk_buff *skb;
540 	struct p54_led *led;
541 
542 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led),
543 			    P54_CONTROL_TYPE_LED, GFP_ATOMIC);
544 	if (unlikely(!skb))
545 		return -ENOMEM;
546 
547 	led = skb_put(skb, sizeof(*led));
548 	led->flags = cpu_to_le16(0x0003);
549 	led->mask[0] = led->mask[1] = cpu_to_le16(priv->softled_state);
550 	led->delay[0] = cpu_to_le16(1);
551 	led->delay[1] = cpu_to_le16(0);
552 	p54_tx(priv, skb);
553 	return 0;
554 }
555 
556 int p54_set_edcf(struct p54_common *priv)
557 {
558 	struct sk_buff *skb;
559 	struct p54_edcf *edcf;
560 	u8 rtd;
561 
562 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf),
563 			    P54_CONTROL_TYPE_DCFINIT, GFP_ATOMIC);
564 	if (unlikely(!skb))
565 		return -ENOMEM;
566 
567 	edcf = skb_put(skb, sizeof(*edcf));
568 	if (priv->use_short_slot) {
569 		edcf->slottime = 9;
570 		edcf->sifs = 0x10;
571 		edcf->eofpad = 0x00;
572 	} else {
573 		edcf->slottime = 20;
574 		edcf->sifs = 0x0a;
575 		edcf->eofpad = 0x06;
576 	}
577 	/*
578 	 * calculate the extra round trip delay according to the
579 	 * formula from 802.11-2007 17.3.8.6.
580 	 */
581 	rtd = 3 * priv->coverage_class;
582 	edcf->slottime += rtd;
583 	edcf->round_trip_delay = cpu_to_le16(rtd);
584 	/* (see prism54/isl_oid.h for further details) */
585 	edcf->frameburst = cpu_to_le16(0);
586 	edcf->flags = 0;
587 	memset(edcf->mapping, 0, sizeof(edcf->mapping));
588 	memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue));
589 	p54_tx(priv, skb);
590 	return 0;
591 }
592 
593 int p54_set_ps(struct p54_common *priv)
594 {
595 	struct sk_buff *skb;
596 	struct p54_psm *psm;
597 	unsigned int i;
598 	u16 mode;
599 
600 	if (priv->hw->conf.flags & IEEE80211_CONF_PS &&
601 	    !priv->powersave_override)
602 		mode = P54_PSM | P54_PSM_BEACON_TIMEOUT | P54_PSM_DTIM |
603 		       P54_PSM_CHECKSUM | P54_PSM_MCBC;
604 	else
605 		mode = P54_PSM_CAM;
606 
607 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*psm),
608 			    P54_CONTROL_TYPE_PSM, GFP_ATOMIC);
609 	if (!skb)
610 		return -ENOMEM;
611 
612 	psm = skb_put(skb, sizeof(*psm));
613 	psm->mode = cpu_to_le16(mode);
614 	psm->aid = cpu_to_le16(priv->aid);
615 	for (i = 0; i < ARRAY_SIZE(psm->intervals); i++) {
616 		psm->intervals[i].interval =
617 			cpu_to_le16(priv->hw->conf.listen_interval);
618 		psm->intervals[i].periods = cpu_to_le16(1);
619 	}
620 
621 	psm->beacon_rssi_skip_max = 200;
622 	psm->rssi_delta_threshold = 0;
623 	psm->nr = 1;
624 	psm->exclude[0] = WLAN_EID_TIM;
625 
626 	p54_tx(priv, skb);
627 	priv->phy_ps = mode != P54_PSM_CAM;
628 	return 0;
629 }
630 
631 int p54_init_xbow_synth(struct p54_common *priv)
632 {
633 	struct sk_buff *skb;
634 	struct p54_xbow_synth *xbow;
635 
636 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow),
637 			    P54_CONTROL_TYPE_XBOW_SYNTH_CFG, GFP_KERNEL);
638 	if (unlikely(!skb))
639 		return -ENOMEM;
640 
641 	xbow = skb_put(skb, sizeof(*xbow));
642 	xbow->magic1 = cpu_to_le16(0x1);
643 	xbow->magic2 = cpu_to_le16(0x2);
644 	xbow->freq = cpu_to_le16(5390);
645 	memset(xbow->padding, 0, sizeof(xbow->padding));
646 	p54_tx(priv, skb);
647 	return 0;
648 }
649 
650 int p54_upload_key(struct p54_common *priv, u8 algo, int slot, u8 idx, u8 len,
651 		   u8 *addr, u8* key)
652 {
653 	struct sk_buff *skb;
654 	struct p54_keycache *rxkey;
655 
656 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*rxkey),
657 			    P54_CONTROL_TYPE_RX_KEYCACHE, GFP_KERNEL);
658 	if (unlikely(!skb))
659 		return -ENOMEM;
660 
661 	rxkey = skb_put(skb, sizeof(*rxkey));
662 	rxkey->entry = slot;
663 	rxkey->key_id = idx;
664 	rxkey->key_type = algo;
665 	if (addr)
666 		memcpy(rxkey->mac, addr, ETH_ALEN);
667 	else
668 		eth_broadcast_addr(rxkey->mac);
669 
670 	switch (algo) {
671 	case P54_CRYPTO_WEP:
672 	case P54_CRYPTO_AESCCMP:
673 		rxkey->key_len = min_t(u8, 16, len);
674 		memcpy(rxkey->key, key, rxkey->key_len);
675 		break;
676 
677 	case P54_CRYPTO_TKIPMICHAEL:
678 		rxkey->key_len = 24;
679 		memcpy(rxkey->key, key, 16);
680 		memcpy(&(rxkey->key[16]), &(key
681 			[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY]), 8);
682 		break;
683 
684 	case P54_CRYPTO_NONE:
685 		rxkey->key_len = 0;
686 		memset(rxkey->key, 0, sizeof(rxkey->key));
687 		break;
688 
689 	default:
690 		wiphy_err(priv->hw->wiphy,
691 			  "invalid cryptographic algorithm: %d\n", algo);
692 		dev_kfree_skb(skb);
693 		return -EINVAL;
694 	}
695 
696 	p54_tx(priv, skb);
697 	return 0;
698 }
699 
700 int p54_fetch_statistics(struct p54_common *priv)
701 {
702 	struct ieee80211_tx_info *txinfo;
703 	struct p54_tx_info *p54info;
704 	struct sk_buff *skb;
705 
706 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL,
707 			    sizeof(struct p54_statistics),
708 			    P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL);
709 	if (!skb)
710 		return -ENOMEM;
711 
712 	/*
713 	 * The statistic feedback causes some extra headaches here, if it
714 	 * is not to crash/corrupt the firmware data structures.
715 	 *
716 	 * Unlike all other Control Get OIDs we can not use helpers like
717 	 * skb_put to reserve the space for the data we're requesting.
718 	 * Instead the extra frame length -which will hold the results later-
719 	 * will only be told to the p54_assign_address, so that following
720 	 * frames won't be placed into the  allegedly empty area.
721 	 */
722 	txinfo = IEEE80211_SKB_CB(skb);
723 	p54info = (void *) txinfo->rate_driver_data;
724 	p54info->extra_len = sizeof(struct p54_statistics);
725 
726 	p54_tx(priv, skb);
727 	return 0;
728 }
729 
730 int p54_set_groupfilter(struct p54_common *priv)
731 {
732 	struct p54_group_address_table *grp;
733 	struct sk_buff *skb;
734 	bool on = false;
735 
736 	skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*grp),
737 			    P54_CONTROL_TYPE_GROUP_ADDRESS_TABLE, GFP_KERNEL);
738 	if (!skb)
739 		return -ENOMEM;
740 
741 	grp = skb_put(skb, sizeof(*grp));
742 
743 	on = !(priv->filter_flags & FIF_ALLMULTI) &&
744 	     (priv->mc_maclist_num > 0 &&
745 	      priv->mc_maclist_num <= MC_FILTER_ADDRESS_NUM);
746 
747 	if (on) {
748 		grp->filter_enable = cpu_to_le16(1);
749 		grp->num_address = cpu_to_le16(priv->mc_maclist_num);
750 		memcpy(grp->mac_list, priv->mc_maclist, sizeof(grp->mac_list));
751 	} else {
752 		grp->filter_enable = cpu_to_le16(0);
753 		grp->num_address = cpu_to_le16(0);
754 		memset(grp->mac_list, 0, sizeof(grp->mac_list));
755 	}
756 
757 	p54_tx(priv, skb);
758 	return 0;
759 }
760