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spi-topcliff-pch: add recovery processing in case wait-event timeout
[zen-stable.git] / drivers / net / wireless / p54 / main.c
blobaf2ca1a9c7d32ed014f11d1390e5c1d8bcf09fb6
1 /*
2 * mac80211 glue code for mac80211 Prism54 drivers
3 *
4 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
5 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7 *
8 * Based on:
9 * - the islsm (softmac prism54) driver, which is:
10 * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
11 * - stlc45xx driver
12 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 */
18
19 #include <linux/init.h>
20 #include <linux/slab.h>
21 #include <linux/firmware.h>
22 #include <linux/etherdevice.h>
23 #include <linux/module.h>
24
25 #include <net/mac80211.h>
26
27 #include "p54.h"
28 #include "lmac.h"
29
30 static bool modparam_nohwcrypt;
31 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
32 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
33 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
34 MODULE_DESCRIPTION("Softmac Prism54 common code");
35 MODULE_LICENSE("GPL");
36 MODULE_ALIAS("prism54common");
37
38 static int p54_sta_add_remove(struct ieee80211_hw *hw,
39 struct ieee80211_vif *vif,
40 struct ieee80211_sta *sta)
41 {
42 struct p54_common *priv = hw->priv;
43
44 /*
45 * Notify the firmware that we don't want or we don't
46 * need to buffer frames for this station anymore.
47 */
48
49 p54_sta_unlock(priv, sta->addr);
50
51 return 0;
52 }
53
54 static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
55 enum sta_notify_cmd notify_cmd,
56 struct ieee80211_sta *sta)
57 {
58 struct p54_common *priv = dev->priv;
59
60 switch (notify_cmd) {
61 case STA_NOTIFY_AWAKE:
62 /* update the firmware's filter table */
63 p54_sta_unlock(priv, sta->addr);
64 break;
65 default:
66 break;
67 }
68 }
69
70 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
71 bool set)
72 {
73 struct p54_common *priv = dev->priv;
74
75 return p54_update_beacon_tim(priv, sta->aid, set);
76 }
77
78 u8 *p54_find_ie(struct sk_buff *skb, u8 ie)
79 {
80 struct ieee80211_mgmt *mgmt = (void *)skb->data;
81 u8 *pos, *end;
82
83 if (skb->len <= sizeof(mgmt))
84 return NULL;
85
86 pos = (u8 *)mgmt->u.beacon.variable;
87 end = skb->data + skb->len;
88 while (pos < end) {
89 if (pos + 2 + pos[1] > end)
90 return NULL;
91
92 if (pos[0] == ie)
93 return pos;
94
95 pos += 2 + pos[1];
96 }
97 return NULL;
98 }
99
100 static int p54_beacon_format_ie_tim(struct sk_buff *skb)
101 {
102 /*
103 * the good excuse for this mess is ... the firmware.
104 * The dummy TIM MUST be at the end of the beacon frame,
105 * because it'll be overwritten!
106 */
107 u8 *tim;
108 u8 dtim_len;
109 u8 dtim_period;
110 u8 *next;
111
112 tim = p54_find_ie(skb, WLAN_EID_TIM);
113 if (!tim)
114 return 0;
115
116 dtim_len = tim[1];
117 dtim_period = tim[3];
118 next = tim + 2 + dtim_len;
119
120 if (dtim_len < 3)
121 return -EINVAL;
122
123 memmove(tim, next, skb_tail_pointer(skb) - next);
124 tim = skb_tail_pointer(skb) - (dtim_len + 2);
125
126 /* add the dummy at the end */
127 tim[0] = WLAN_EID_TIM;
128 tim[1] = 3;
129 tim[2] = 0;
130 tim[3] = dtim_period;
131 tim[4] = 0;
132
133 if (dtim_len > 3)
134 skb_trim(skb, skb->len - (dtim_len - 3));
135
136 return 0;
137 }
138
139 static int p54_beacon_update(struct p54_common *priv,
140 struct ieee80211_vif *vif)
141 {
142 struct sk_buff *beacon;
143 int ret;
144
145 beacon = ieee80211_beacon_get(priv->hw, vif);
146 if (!beacon)
147 return -ENOMEM;
148 ret = p54_beacon_format_ie_tim(beacon);
149 if (ret)
150 return ret;
151
152 /*
153 * During operation, the firmware takes care of beaconing.
154 * The driver only needs to upload a new beacon template, once
155 * the template was changed by the stack or userspace.
156 *
157 * LMAC API 3.2.2 also specifies that the driver does not need
158 * to cancel the old beacon template by hand, instead the firmware
159 * will release the previous one through the feedback mechanism.
160 */
161 p54_tx_80211(priv->hw, beacon);
162 priv->tsf_high32 = 0;
163 priv->tsf_low32 = 0;
164
165 return 0;
166 }
167
168 static int p54_start(struct ieee80211_hw *dev)
169 {
170 struct p54_common *priv = dev->priv;
171 int err;
172
173 mutex_lock(&priv->conf_mutex);
174 err = priv->open(dev);
175 if (err)
176 goto out;
177 P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
178 P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
179 P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
180 P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
181 err = p54_set_edcf(priv);
182 if (err)
183 goto out;
184
185 memset(priv->bssid, ~0, ETH_ALEN);
186 priv->mode = NL80211_IFTYPE_MONITOR;
187 err = p54_setup_mac(priv);
188 if (err) {
189 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
190 goto out;
191 }
192
193 ieee80211_queue_delayed_work(dev, &priv->work, 0);
194
195 priv->softled_state = 0;
196 err = p54_set_leds(priv);
197
198 out:
199 mutex_unlock(&priv->conf_mutex);
200 return err;
201 }
202
203 static void p54_stop(struct ieee80211_hw *dev)
204 {
205 struct p54_common *priv = dev->priv;
206 int i;
207
208 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
209 priv->softled_state = 0;
210 cancel_delayed_work_sync(&priv->work);
211 mutex_lock(&priv->conf_mutex);
212 p54_set_leds(priv);
213 priv->stop(dev);
214 skb_queue_purge(&priv->tx_pending);
215 skb_queue_purge(&priv->tx_queue);
216 for (i = 0; i < P54_QUEUE_NUM; i++) {
217 priv->tx_stats[i].count = 0;
218 priv->tx_stats[i].len = 0;
219 }
220
221 priv->beacon_req_id = cpu_to_le32(0);
222 priv->tsf_high32 = priv->tsf_low32 = 0;
223 mutex_unlock(&priv->conf_mutex);
224 }
225
226 static int p54_add_interface(struct ieee80211_hw *dev,
227 struct ieee80211_vif *vif)
228 {
229 struct p54_common *priv = dev->priv;
230
231 mutex_lock(&priv->conf_mutex);
232 if (priv->mode != NL80211_IFTYPE_MONITOR) {
233 mutex_unlock(&priv->conf_mutex);
234 return -EOPNOTSUPP;
235 }
236
237 priv->vif = vif;
238
239 switch (vif->type) {
240 case NL80211_IFTYPE_STATION:
241 case NL80211_IFTYPE_ADHOC:
242 case NL80211_IFTYPE_AP:
243 case NL80211_IFTYPE_MESH_POINT:
244 priv->mode = vif->type;
245 break;
246 default:
247 mutex_unlock(&priv->conf_mutex);
248 return -EOPNOTSUPP;
249 }
250
251 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
252 p54_setup_mac(priv);
253 mutex_unlock(&priv->conf_mutex);
254 return 0;
255 }
256
257 static void p54_remove_interface(struct ieee80211_hw *dev,
258 struct ieee80211_vif *vif)
259 {
260 struct p54_common *priv = dev->priv;
261
262 mutex_lock(&priv->conf_mutex);
263 priv->vif = NULL;
264
265 /*
266 * LMAC API 3.2.2 states that any active beacon template must be
267 * canceled by the driver before attempting a mode transition.
268 */
269 if (le32_to_cpu(priv->beacon_req_id) != 0) {
270 p54_tx_cancel(priv, priv->beacon_req_id);
271 wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ);
272 }
273 priv->mode = NL80211_IFTYPE_MONITOR;
274 memset(priv->mac_addr, 0, ETH_ALEN);
275 memset(priv->bssid, 0, ETH_ALEN);
276 p54_setup_mac(priv);
277 mutex_unlock(&priv->conf_mutex);
278 }
279
280 static int p54_wait_for_stats(struct ieee80211_hw *dev)
281 {
282 struct p54_common *priv = dev->priv;
283 int ret;
284
285 priv->update_stats = true;
286 ret = p54_fetch_statistics(priv);
287 if (ret)
288 return ret;
289
290 ret = wait_for_completion_interruptible_timeout(&priv->stat_comp, HZ);
291 if (ret == 0)
292 return -ETIMEDOUT;
293
294 return 0;
295 }
296
297 static void p54_reset_stats(struct p54_common *priv)
298 {
299 struct ieee80211_channel *chan = priv->curchan;
300
301 if (chan) {
302 struct survey_info *info = &priv->survey[chan->hw_value];
303
304 /* only reset channel statistics, don't touch .filled, etc. */
305 info->channel_time = 0;
306 info->channel_time_busy = 0;
307 info->channel_time_tx = 0;
308 }
309
310 priv->update_stats = true;
311 priv->survey_raw.active = 0;
312 priv->survey_raw.cca = 0;
313 priv->survey_raw.tx = 0;
314 }
315
316 static int p54_config(struct ieee80211_hw *dev, u32 changed)
317 {
318 int ret = 0;
319 struct p54_common *priv = dev->priv;
320 struct ieee80211_conf *conf = &dev->conf;
321
322 mutex_lock(&priv->conf_mutex);
323 if (changed & IEEE80211_CONF_CHANGE_POWER)
324 priv->output_power = conf->power_level << 2;
325 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
326 struct ieee80211_channel *oldchan;
327 WARN_ON(p54_wait_for_stats(dev));
328 oldchan = priv->curchan;
329 priv->curchan = NULL;
330 ret = p54_scan(priv, P54_SCAN_EXIT, 0);
331 if (ret) {
332 priv->curchan = oldchan;
333 goto out;
334 }
335 /*
336 * TODO: Use the LM_SCAN_TRAP to determine the current
337 * operating channel.
338 */
339 priv->curchan = priv->hw->conf.channel;
340 p54_reset_stats(priv);
341 WARN_ON(p54_fetch_statistics(priv));
342 }
343 if (changed & IEEE80211_CONF_CHANGE_PS) {
344 WARN_ON(p54_wait_for_stats(dev));
345 ret = p54_set_ps(priv);
346 if (ret)
347 goto out;
348 WARN_ON(p54_wait_for_stats(dev));
349 }
350 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
351 WARN_ON(p54_wait_for_stats(dev));
352 ret = p54_setup_mac(priv);
353 if (ret)
354 goto out;
355 WARN_ON(p54_wait_for_stats(dev));
356 }
357
358 out:
359 mutex_unlock(&priv->conf_mutex);
360 return ret;
361 }
362
363 static u64 p54_prepare_multicast(struct ieee80211_hw *dev,
364 struct netdev_hw_addr_list *mc_list)
365 {
366 struct p54_common *priv = dev->priv;
367 struct netdev_hw_addr *ha;
368 int i;
369
370 BUILD_BUG_ON(ARRAY_SIZE(priv->mc_maclist) !=
371 ARRAY_SIZE(((struct p54_group_address_table *)NULL)->mac_list));
372 /*
373 * The first entry is reserved for the global broadcast MAC.
374 * Otherwise the firmware will drop it and ARP will no longer work.
375 */
376 i = 1;
377 priv->mc_maclist_num = netdev_hw_addr_list_count(mc_list) + i;
378 netdev_hw_addr_list_for_each(ha, mc_list) {
379 memcpy(&priv->mc_maclist[i], ha->addr, ETH_ALEN);
380 i++;
381 if (i >= ARRAY_SIZE(priv->mc_maclist))
382 break;
383 }
384
385 return 1; /* update */
386 }
387
388 static void p54_configure_filter(struct ieee80211_hw *dev,
389 unsigned int changed_flags,
390 unsigned int *total_flags,
391 u64 multicast)
392 {
393 struct p54_common *priv = dev->priv;
394
395 *total_flags &= FIF_PROMISC_IN_BSS |
396 FIF_ALLMULTI |
397 FIF_OTHER_BSS;
398
399 priv->filter_flags = *total_flags;
400
401 if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS))
402 p54_setup_mac(priv);
403
404 if (changed_flags & FIF_ALLMULTI || multicast)
405 p54_set_groupfilter(priv);
406 }
407
408 static int p54_conf_tx(struct ieee80211_hw *dev,
409 struct ieee80211_vif *vif, u16 queue,
410 const struct ieee80211_tx_queue_params *params)
411 {
412 struct p54_common *priv = dev->priv;
413 int ret;
414
415 mutex_lock(&priv->conf_mutex);
416 if (queue < dev->queues) {
417 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
418 params->cw_min, params->cw_max, params->txop);
419 ret = p54_set_edcf(priv);
420 } else
421 ret = -EINVAL;
422 mutex_unlock(&priv->conf_mutex);
423 return ret;
424 }
425
426 static void p54_work(struct work_struct *work)
427 {
428 struct p54_common *priv = container_of(work, struct p54_common,
429 work.work);
430
431 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
432 return ;
433
434 /*
435 * TODO: walk through tx_queue and do the following tasks
436 * 1. initiate bursts.
437 * 2. cancel stuck frames / reset the device if necessary.
438 */
439
440 mutex_lock(&priv->conf_mutex);
441 WARN_ON_ONCE(p54_fetch_statistics(priv));
442 mutex_unlock(&priv->conf_mutex);
443 }
444
445 static int p54_get_stats(struct ieee80211_hw *dev,
446 struct ieee80211_low_level_stats *stats)
447 {
448 struct p54_common *priv = dev->priv;
449
450 memcpy(stats, &priv->stats, sizeof(*stats));
451 return 0;
452 }
453
454 static void p54_bss_info_changed(struct ieee80211_hw *dev,
455 struct ieee80211_vif *vif,
456 struct ieee80211_bss_conf *info,
457 u32 changed)
458 {
459 struct p54_common *priv = dev->priv;
460
461 mutex_lock(&priv->conf_mutex);
462 if (changed & BSS_CHANGED_BSSID) {
463 memcpy(priv->bssid, info->bssid, ETH_ALEN);
464 p54_setup_mac(priv);
465 }
466
467 if (changed & BSS_CHANGED_BEACON) {
468 p54_scan(priv, P54_SCAN_EXIT, 0);
469 p54_setup_mac(priv);
470 p54_beacon_update(priv, vif);
471 p54_set_edcf(priv);
472 }
473
474 if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {
475 priv->use_short_slot = info->use_short_slot;
476 p54_set_edcf(priv);
477 }
478 if (changed & BSS_CHANGED_BASIC_RATES) {
479 if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
480 priv->basic_rate_mask = (info->basic_rates << 4);
481 else
482 priv->basic_rate_mask = info->basic_rates;
483 p54_setup_mac(priv);
484 if (priv->fw_var >= 0x500)
485 p54_scan(priv, P54_SCAN_EXIT, 0);
486 }
487 if (changed & BSS_CHANGED_ASSOC) {
488 if (info->assoc) {
489 priv->aid = info->aid;
490 priv->wakeup_timer = info->beacon_int *
491 info->dtim_period * 5;
492 p54_setup_mac(priv);
493 } else {
494 priv->wakeup_timer = 500;
495 priv->aid = 0;
496 }
497 }
498
499 mutex_unlock(&priv->conf_mutex);
500 }
501
502 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
503 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
504 struct ieee80211_key_conf *key)
505 {
506 struct p54_common *priv = dev->priv;
507 int slot, ret = 0;
508 u8 algo = 0;
509 u8 *addr = NULL;
510
511 if (modparam_nohwcrypt)
512 return -EOPNOTSUPP;
513
514 mutex_lock(&priv->conf_mutex);
515 if (cmd == SET_KEY) {
516 switch (key->cipher) {
517 case WLAN_CIPHER_SUITE_TKIP:
518 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
519 BR_DESC_PRIV_CAP_TKIP))) {
520 ret = -EOPNOTSUPP;
521 goto out_unlock;
522 }
523 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
524 algo = P54_CRYPTO_TKIPMICHAEL;
525 break;
526 case WLAN_CIPHER_SUITE_WEP40:
527 case WLAN_CIPHER_SUITE_WEP104:
528 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {
529 ret = -EOPNOTSUPP;
530 goto out_unlock;
531 }
532 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
533 algo = P54_CRYPTO_WEP;
534 break;
535 case WLAN_CIPHER_SUITE_CCMP:
536 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {
537 ret = -EOPNOTSUPP;
538 goto out_unlock;
539 }
540 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
541 algo = P54_CRYPTO_AESCCMP;
542 break;
543 default:
544 ret = -EOPNOTSUPP;
545 goto out_unlock;
546 }
547 slot = bitmap_find_free_region(priv->used_rxkeys,
548 priv->rx_keycache_size, 0);
549
550 if (slot < 0) {
551 /*
552 * The device supports the chosen algorithm, but the
553 * firmware does not provide enough key slots to store
554 * all of them.
555 * But encryption offload for outgoing frames is always
556 * possible, so we just pretend that the upload was
557 * successful and do the decryption in software.
558 */
559
560 /* mark the key as invalid. */
561 key->hw_key_idx = 0xff;
562 goto out_unlock;
563 }
564 } else {
565 slot = key->hw_key_idx;
566
567 if (slot == 0xff) {
568 /* This key was not uploaded into the rx key cache. */
569
570 goto out_unlock;
571 }
572
573 bitmap_release_region(priv->used_rxkeys, slot, 0);
574 algo = 0;
575 }
576
577 if (sta)
578 addr = sta->addr;
579
580 ret = p54_upload_key(priv, algo, slot, key->keyidx,
581 key->keylen, addr, key->key);
582 if (ret) {
583 bitmap_release_region(priv->used_rxkeys, slot, 0);
584 ret = -EOPNOTSUPP;
585 goto out_unlock;
586 }
587
588 key->hw_key_idx = slot;
589
590 out_unlock:
591 mutex_unlock(&priv->conf_mutex);
592 return ret;
593 }
594
595 static int p54_get_survey(struct ieee80211_hw *dev, int idx,
596 struct survey_info *survey)
597 {
598 struct p54_common *priv = dev->priv;
599 struct ieee80211_channel *chan;
600 int err, tries;
601 bool in_use = false;
602
603 if (idx >= priv->chan_num)
604 return -ENOENT;
605
606 #define MAX_TRIES 1
607 for (tries = 0; tries < MAX_TRIES; tries++) {
608 chan = priv->curchan;
609 if (chan && chan->hw_value == idx) {
610 mutex_lock(&priv->conf_mutex);
611 err = p54_wait_for_stats(dev);
612 mutex_unlock(&priv->conf_mutex);
613 if (err)
614 return err;
615
616 in_use = true;
617 }
618
619 memcpy(survey, &priv->survey[idx], sizeof(*survey));
620
621 if (in_use) {
622 /* test if the reported statistics are valid. */
623 if (survey->channel_time != 0) {
624 survey->filled |= SURVEY_INFO_IN_USE;
625 } else {
626 /*
627 * hw/fw has not accumulated enough sample sets.
628 * Wait for 100ms, this ought to be enough to
629 * to get at least one non-null set of channel
630 * usage statistics.
631 */
632 msleep(100);
633 continue;
634 }
635 }
636 return 0;
637 }
638 return -ETIMEDOUT;
639 #undef MAX_TRIES
640 }
641
642 static unsigned int p54_flush_count(struct p54_common *priv)
643 {
644 unsigned int total = 0, i;
645
646 BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats));
647
648 /*
649 * Because the firmware has the sole control over any frames
650 * in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they
651 * don't really count as pending or active.
652 */
653 for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++)
654 total += priv->tx_stats[i].len;
655 return total;
656 }
657
658 static void p54_flush(struct ieee80211_hw *dev, bool drop)
659 {
660 struct p54_common *priv = dev->priv;
661 unsigned int total, i;
662
663 /*
664 * Currently, it wouldn't really matter if we wait for one second
665 * or 15 minutes. But once someone gets around and completes the
666 * TODOs [ancel stuck frames / reset device] in p54_work, it will
667 * suddenly make sense to wait that long.
668 */
669 i = P54_STATISTICS_UPDATE * 2 / 20;
670
671 /*
672 * In this case no locking is required because as we speak the
673 * queues have already been stopped and no new frames can sneak
674 * up from behind.
675 */
676 while ((total = p54_flush_count(priv) && i--)) {
677 /* waste time */
678 msleep(20);
679 }
680
681 WARN(total, "tx flush timeout, unresponsive firmware");
682 }
683
684 static void p54_set_coverage_class(struct ieee80211_hw *dev, u8 coverage_class)
685 {
686 struct p54_common *priv = dev->priv;
687
688 mutex_lock(&priv->conf_mutex);
689 /* support all coverage class values as in 802.11-2007 Table 7-27 */
690 priv->coverage_class = clamp_t(u8, coverage_class, 0, 31);
691 p54_set_edcf(priv);
692 mutex_unlock(&priv->conf_mutex);
693 }
694
695 static const struct ieee80211_ops p54_ops = {
696 .tx = p54_tx_80211,
697 .start = p54_start,
698 .stop = p54_stop,
699 .add_interface = p54_add_interface,
700 .remove_interface = p54_remove_interface,
701 .set_tim = p54_set_tim,
702 .sta_notify = p54_sta_notify,
703 .sta_add = p54_sta_add_remove,
704 .sta_remove = p54_sta_add_remove,
705 .set_key = p54_set_key,
706 .config = p54_config,
707 .flush = p54_flush,
708 .bss_info_changed = p54_bss_info_changed,
709 .prepare_multicast = p54_prepare_multicast,
710 .configure_filter = p54_configure_filter,
711 .conf_tx = p54_conf_tx,
712 .get_stats = p54_get_stats,
713 .get_survey = p54_get_survey,
714 .set_coverage_class = p54_set_coverage_class,
715 };
716
717 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
718 {
719 struct ieee80211_hw *dev;
720 struct p54_common *priv;
721
722 dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
723 if (!dev)
724 return NULL;
725
726 priv = dev->priv;
727 priv->hw = dev;
728 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
729 priv->basic_rate_mask = 0x15f;
730 spin_lock_init(&priv->tx_stats_lock);
731 skb_queue_head_init(&priv->tx_queue);
732 skb_queue_head_init(&priv->tx_pending);
733 dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
734 IEEE80211_HW_SIGNAL_DBM |
735 IEEE80211_HW_SUPPORTS_PS |
736 IEEE80211_HW_PS_NULLFUNC_STACK |
737 IEEE80211_HW_BEACON_FILTER |
738 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
739
740 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
741 BIT(NL80211_IFTYPE_ADHOC) |
742 BIT(NL80211_IFTYPE_AP) |
743 BIT(NL80211_IFTYPE_MESH_POINT);
744
745 dev->channel_change_time = 1000; /* TODO: find actual value */
746 priv->beacon_req_id = cpu_to_le32(0);
747 priv->tx_stats[P54_QUEUE_BEACON].limit = 1;
748 priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1;
749 priv->tx_stats[P54_QUEUE_MGMT].limit = 3;
750 priv->tx_stats[P54_QUEUE_CAB].limit = 3;
751 priv->tx_stats[P54_QUEUE_DATA].limit = 5;
752 dev->queues = 1;
753 priv->noise = -94;
754 /*
755 * We support at most 8 tries no matter which rate they're at,
756 * we cannot support max_rates * max_rate_tries as we set it
757 * here, but setting it correctly to 4/2 or so would limit us
758 * artificially if the RC algorithm wants just two rates, so
759 * let's say 4/7, we'll redistribute it at TX time, see the
760 * comments there.
761 */
762 dev->max_rates = 4;
763 dev->max_rate_tries = 7;
764 dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
765 sizeof(struct p54_tx_data);
766
767 /*
768 * For now, disable PS by default because it affects
769 * link stability significantly.
770 */
771 dev->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
772
773 mutex_init(&priv->conf_mutex);
774 mutex_init(&priv->eeprom_mutex);
775 init_completion(&priv->stat_comp);
776 init_completion(&priv->eeprom_comp);
777 init_completion(&priv->beacon_comp);
778 INIT_DELAYED_WORK(&priv->work, p54_work);
779
780 memset(&priv->mc_maclist[0], ~0, ETH_ALEN);
781 priv->curchan = NULL;
782 p54_reset_stats(priv);
783 return dev;
784 }
785 EXPORT_SYMBOL_GPL(p54_init_common);
786
787 int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
788 {
789 struct p54_common __maybe_unused *priv = dev->priv;
790 int err;
791
792 err = ieee80211_register_hw(dev);
793 if (err) {
794 dev_err(pdev, "Cannot register device (%d).\n", err);
795 return err;
796 }
797
798 #ifdef CONFIG_P54_LEDS
799 err = p54_init_leds(priv);
800 if (err)
801 return err;
802 #endif /* CONFIG_P54_LEDS */
803
804 dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
805 return 0;
806 }
807 EXPORT_SYMBOL_GPL(p54_register_common);
808
809 void p54_free_common(struct ieee80211_hw *dev)
810 {
811 struct p54_common *priv = dev->priv;
812 unsigned int i;
813
814 for (i = 0; i < IEEE80211_NUM_BANDS; i++)
815 kfree(priv->band_table[i]);
816
817 kfree(priv->iq_autocal);
818 kfree(priv->output_limit);
819 kfree(priv->curve_data);
820 kfree(priv->rssi_db);
821 kfree(priv->used_rxkeys);
822 kfree(priv->survey);
823 priv->iq_autocal = NULL;
824 priv->output_limit = NULL;
825 priv->curve_data = NULL;
826 priv->rssi_db = NULL;
827 priv->used_rxkeys = NULL;
828 priv->survey = NULL;
829 ieee80211_free_hw(dev);
830 }
831 EXPORT_SYMBOL_GPL(p54_free_common);
832
833 void p54_unregister_common(struct ieee80211_hw *dev)
834 {
835 struct p54_common *priv = dev->priv;
836
837 #ifdef CONFIG_P54_LEDS
838 p54_unregister_leds(priv);
839 #endif /* CONFIG_P54_LEDS */
840
841 ieee80211_unregister_hw(dev);
842 mutex_destroy(&priv->conf_mutex);
843 mutex_destroy(&priv->eeprom_mutex);
844 }
845 EXPORT_SYMBOL_GPL(p54_unregister_common);