clocks: tegra12: Use static CPU-EMC co-relation
[linux-3.10.git] / drivers / net / wireless / p54 / main.c
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 ieee80211_tx_control control = { };
143         struct sk_buff *beacon;
144         int ret;
145
146         beacon = ieee80211_beacon_get(priv->hw, vif);
147         if (!beacon)
148                 return -ENOMEM;
149         ret = p54_beacon_format_ie_tim(beacon);
150         if (ret)
151                 return ret;
152
153         /*
154          * During operation, the firmware takes care of beaconing.
155          * The driver only needs to upload a new beacon template, once
156          * the template was changed by the stack or userspace.
157          *
158          * LMAC API 3.2.2 also specifies that the driver does not need
159          * to cancel the old beacon template by hand, instead the firmware
160          * will release the previous one through the feedback mechanism.
161          */
162         p54_tx_80211(priv->hw, &control, beacon);
163         priv->tsf_high32 = 0;
164         priv->tsf_low32 = 0;
165
166         return 0;
167 }
168
169 static int p54_start(struct ieee80211_hw *dev)
170 {
171         struct p54_common *priv = dev->priv;
172         int err;
173
174         mutex_lock(&priv->conf_mutex);
175         err = priv->open(dev);
176         if (err)
177                 goto out;
178         P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
179         P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
180         P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
181         P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
182         err = p54_set_edcf(priv);
183         if (err)
184                 goto out;
185
186         memset(priv->bssid, ~0, ETH_ALEN);
187         priv->mode = NL80211_IFTYPE_MONITOR;
188         err = p54_setup_mac(priv);
189         if (err) {
190                 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
191                 goto out;
192         }
193
194         ieee80211_queue_delayed_work(dev, &priv->work, 0);
195
196         priv->softled_state = 0;
197         err = p54_set_leds(priv);
198
199 out:
200         mutex_unlock(&priv->conf_mutex);
201         return err;
202 }
203
204 static void p54_stop(struct ieee80211_hw *dev)
205 {
206         struct p54_common *priv = dev->priv;
207         int i;
208
209         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
210         priv->softled_state = 0;
211         cancel_delayed_work_sync(&priv->work);
212         mutex_lock(&priv->conf_mutex);
213         p54_set_leds(priv);
214         priv->stop(dev);
215         skb_queue_purge(&priv->tx_pending);
216         skb_queue_purge(&priv->tx_queue);
217         for (i = 0; i < P54_QUEUE_NUM; i++) {
218                 priv->tx_stats[i].count = 0;
219                 priv->tx_stats[i].len = 0;
220         }
221
222         priv->beacon_req_id = cpu_to_le32(0);
223         priv->tsf_high32 = priv->tsf_low32 = 0;
224         mutex_unlock(&priv->conf_mutex);
225 }
226
227 static int p54_add_interface(struct ieee80211_hw *dev,
228                              struct ieee80211_vif *vif)
229 {
230         struct p54_common *priv = dev->priv;
231         int err;
232
233         vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
234
235         mutex_lock(&priv->conf_mutex);
236         if (priv->mode != NL80211_IFTYPE_MONITOR) {
237                 mutex_unlock(&priv->conf_mutex);
238                 return -EOPNOTSUPP;
239         }
240
241         priv->vif = vif;
242
243         switch (vif->type) {
244         case NL80211_IFTYPE_STATION:
245         case NL80211_IFTYPE_ADHOC:
246         case NL80211_IFTYPE_AP:
247         case NL80211_IFTYPE_MESH_POINT:
248                 priv->mode = vif->type;
249                 break;
250         default:
251                 mutex_unlock(&priv->conf_mutex);
252                 return -EOPNOTSUPP;
253         }
254
255         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
256         err = p54_setup_mac(priv);
257         mutex_unlock(&priv->conf_mutex);
258         return err;
259 }
260
261 static void p54_remove_interface(struct ieee80211_hw *dev,
262                                  struct ieee80211_vif *vif)
263 {
264         struct p54_common *priv = dev->priv;
265
266         mutex_lock(&priv->conf_mutex);
267         priv->vif = NULL;
268
269         /*
270          * LMAC API 3.2.2 states that any active beacon template must be
271          * canceled by the driver before attempting a mode transition.
272          */
273         if (le32_to_cpu(priv->beacon_req_id) != 0) {
274                 p54_tx_cancel(priv, priv->beacon_req_id);
275                 wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ);
276         }
277         priv->mode = NL80211_IFTYPE_MONITOR;
278         memset(priv->mac_addr, 0, ETH_ALEN);
279         memset(priv->bssid, 0, ETH_ALEN);
280         p54_setup_mac(priv);
281         mutex_unlock(&priv->conf_mutex);
282 }
283
284 static int p54_wait_for_stats(struct ieee80211_hw *dev)
285 {
286         struct p54_common *priv = dev->priv;
287         int ret;
288
289         priv->update_stats = true;
290         ret = p54_fetch_statistics(priv);
291         if (ret)
292                 return ret;
293
294         ret = wait_for_completion_interruptible_timeout(&priv->stat_comp, HZ);
295         if (ret == 0)
296                 return -ETIMEDOUT;
297
298         return 0;
299 }
300
301 static void p54_reset_stats(struct p54_common *priv)
302 {
303         struct ieee80211_channel *chan = priv->curchan;
304
305         if (chan) {
306                 struct survey_info *info = &priv->survey[chan->hw_value];
307
308                 /* only reset channel statistics, don't touch .filled, etc. */
309                 info->channel_time = 0;
310                 info->channel_time_busy = 0;
311                 info->channel_time_tx = 0;
312         }
313
314         priv->update_stats = true;
315         priv->survey_raw.active = 0;
316         priv->survey_raw.cca = 0;
317         priv->survey_raw.tx = 0;
318 }
319
320 static int p54_config(struct ieee80211_hw *dev, u32 changed)
321 {
322         int ret = 0;
323         struct p54_common *priv = dev->priv;
324         struct ieee80211_conf *conf = &dev->conf;
325
326         mutex_lock(&priv->conf_mutex);
327         if (changed & IEEE80211_CONF_CHANGE_POWER)
328                 priv->output_power = conf->power_level << 2;
329         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
330                 struct ieee80211_channel *oldchan;
331                 WARN_ON(p54_wait_for_stats(dev));
332                 oldchan = priv->curchan;
333                 priv->curchan = NULL;
334                 ret = p54_scan(priv, P54_SCAN_EXIT, 0);
335                 if (ret) {
336                         priv->curchan = oldchan;
337                         goto out;
338                 }
339                 /*
340                  * TODO: Use the LM_SCAN_TRAP to determine the current
341                  * operating channel.
342                  */
343                 priv->curchan = priv->hw->conf.chandef.chan;
344                 p54_reset_stats(priv);
345                 WARN_ON(p54_fetch_statistics(priv));
346         }
347         if (changed & IEEE80211_CONF_CHANGE_PS) {
348                 WARN_ON(p54_wait_for_stats(dev));
349                 ret = p54_set_ps(priv);
350                 if (ret)
351                         goto out;
352                 WARN_ON(p54_wait_for_stats(dev));
353         }
354         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
355                 WARN_ON(p54_wait_for_stats(dev));
356                 ret = p54_setup_mac(priv);
357                 if (ret)
358                         goto out;
359                 WARN_ON(p54_wait_for_stats(dev));
360         }
361
362 out:
363         mutex_unlock(&priv->conf_mutex);
364         return ret;
365 }
366
367 static u64 p54_prepare_multicast(struct ieee80211_hw *dev,
368                                  struct netdev_hw_addr_list *mc_list)
369 {
370         struct p54_common *priv = dev->priv;
371         struct netdev_hw_addr *ha;
372         int i;
373
374         BUILD_BUG_ON(ARRAY_SIZE(priv->mc_maclist) !=
375                 ARRAY_SIZE(((struct p54_group_address_table *)NULL)->mac_list));
376         /*
377          * The first entry is reserved for the global broadcast MAC.
378          * Otherwise the firmware will drop it and ARP will no longer work.
379          */
380         i = 1;
381         priv->mc_maclist_num = netdev_hw_addr_list_count(mc_list) + i;
382         netdev_hw_addr_list_for_each(ha, mc_list) {
383                 memcpy(&priv->mc_maclist[i], ha->addr, ETH_ALEN);
384                 i++;
385                 if (i >= ARRAY_SIZE(priv->mc_maclist))
386                         break;
387         }
388
389         return 1; /* update */
390 }
391
392 static void p54_configure_filter(struct ieee80211_hw *dev,
393                                  unsigned int changed_flags,
394                                  unsigned int *total_flags,
395                                  u64 multicast)
396 {
397         struct p54_common *priv = dev->priv;
398
399         *total_flags &= FIF_PROMISC_IN_BSS |
400                         FIF_ALLMULTI |
401                         FIF_OTHER_BSS;
402
403         priv->filter_flags = *total_flags;
404
405         if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS))
406                 p54_setup_mac(priv);
407
408         if (changed_flags & FIF_ALLMULTI || multicast)
409                 p54_set_groupfilter(priv);
410 }
411
412 static int p54_conf_tx(struct ieee80211_hw *dev,
413                        struct ieee80211_vif *vif, u16 queue,
414                        const struct ieee80211_tx_queue_params *params)
415 {
416         struct p54_common *priv = dev->priv;
417         int ret;
418
419         mutex_lock(&priv->conf_mutex);
420         if (queue < dev->queues) {
421                 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
422                         params->cw_min, params->cw_max, params->txop);
423                 ret = p54_set_edcf(priv);
424         } else
425                 ret = -EINVAL;
426         mutex_unlock(&priv->conf_mutex);
427         return ret;
428 }
429
430 static void p54_work(struct work_struct *work)
431 {
432         struct p54_common *priv = container_of(work, struct p54_common,
433                                                work.work);
434
435         if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
436                 return ;
437
438         /*
439          * TODO: walk through tx_queue and do the following tasks
440          *      1. initiate bursts.
441          *      2. cancel stuck frames / reset the device if necessary.
442          */
443
444         mutex_lock(&priv->conf_mutex);
445         WARN_ON_ONCE(p54_fetch_statistics(priv));
446         mutex_unlock(&priv->conf_mutex);
447 }
448
449 static int p54_get_stats(struct ieee80211_hw *dev,
450                          struct ieee80211_low_level_stats *stats)
451 {
452         struct p54_common *priv = dev->priv;
453
454         memcpy(stats, &priv->stats, sizeof(*stats));
455         return 0;
456 }
457
458 static void p54_bss_info_changed(struct ieee80211_hw *dev,
459                                  struct ieee80211_vif *vif,
460                                  struct ieee80211_bss_conf *info,
461                                  u32 changed)
462 {
463         struct p54_common *priv = dev->priv;
464
465         mutex_lock(&priv->conf_mutex);
466         if (changed & BSS_CHANGED_BSSID) {
467                 memcpy(priv->bssid, info->bssid, ETH_ALEN);
468                 p54_setup_mac(priv);
469         }
470
471         if (changed & BSS_CHANGED_BEACON) {
472                 p54_scan(priv, P54_SCAN_EXIT, 0);
473                 p54_setup_mac(priv);
474                 p54_beacon_update(priv, vif);
475                 p54_set_edcf(priv);
476         }
477
478         if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {
479                 priv->use_short_slot = info->use_short_slot;
480                 p54_set_edcf(priv);
481         }
482         if (changed & BSS_CHANGED_BASIC_RATES) {
483                 if (dev->conf.chandef.chan->band == IEEE80211_BAND_5GHZ)
484                         priv->basic_rate_mask = (info->basic_rates << 4);
485                 else
486                         priv->basic_rate_mask = info->basic_rates;
487                 p54_setup_mac(priv);
488                 if (priv->fw_var >= 0x500)
489                         p54_scan(priv, P54_SCAN_EXIT, 0);
490         }
491         if (changed & BSS_CHANGED_ASSOC) {
492                 if (info->assoc) {
493                         priv->aid = info->aid;
494                         priv->wakeup_timer = info->beacon_int *
495                                              info->dtim_period * 5;
496                         p54_setup_mac(priv);
497                 } else {
498                         priv->wakeup_timer = 500;
499                         priv->aid = 0;
500                 }
501         }
502
503         mutex_unlock(&priv->conf_mutex);
504 }
505
506 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
507                        struct ieee80211_vif *vif, struct ieee80211_sta *sta,
508                        struct ieee80211_key_conf *key)
509 {
510         struct p54_common *priv = dev->priv;
511         int slot, ret = 0;
512         u8 algo = 0;
513         u8 *addr = NULL;
514
515         if (modparam_nohwcrypt)
516                 return -EOPNOTSUPP;
517
518         if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) {
519                 /*
520                  * Unfortunately most/all firmwares are trying to decrypt
521                  * incoming management frames if a suitable key can be found.
522                  * However, in doing so the data in these frames gets
523                  * corrupted. So, we can't have firmware supported crypto
524                  * offload in this case.
525                  */
526                 return -EOPNOTSUPP;
527         }
528
529         mutex_lock(&priv->conf_mutex);
530         if (cmd == SET_KEY) {
531                 switch (key->cipher) {
532                 case WLAN_CIPHER_SUITE_TKIP:
533                         if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
534                               BR_DESC_PRIV_CAP_TKIP))) {
535                                 ret = -EOPNOTSUPP;
536                                 goto out_unlock;
537                         }
538                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
539                         algo = P54_CRYPTO_TKIPMICHAEL;
540                         break;
541                 case WLAN_CIPHER_SUITE_WEP40:
542                 case WLAN_CIPHER_SUITE_WEP104:
543                         if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {
544                                 ret = -EOPNOTSUPP;
545                                 goto out_unlock;
546                         }
547                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
548                         algo = P54_CRYPTO_WEP;
549                         break;
550                 case WLAN_CIPHER_SUITE_CCMP:
551                         if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {
552                                 ret = -EOPNOTSUPP;
553                                 goto out_unlock;
554                         }
555                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
556                         algo = P54_CRYPTO_AESCCMP;
557                         break;
558                 default:
559                         ret = -EOPNOTSUPP;
560                         goto out_unlock;
561                 }
562                 slot = bitmap_find_free_region(priv->used_rxkeys,
563                                                priv->rx_keycache_size, 0);
564
565                 if (slot < 0) {
566                         /*
567                          * The device supports the chosen algorithm, but the
568                          * firmware does not provide enough key slots to store
569                          * all of them.
570                          * But encryption offload for outgoing frames is always
571                          * possible, so we just pretend that the upload was
572                          * successful and do the decryption in software.
573                          */
574
575                         /* mark the key as invalid. */
576                         key->hw_key_idx = 0xff;
577                         goto out_unlock;
578                 }
579         } else {
580                 slot = key->hw_key_idx;
581
582                 if (slot == 0xff) {
583                         /* This key was not uploaded into the rx key cache. */
584
585                         goto out_unlock;
586                 }
587
588                 bitmap_release_region(priv->used_rxkeys, slot, 0);
589                 algo = 0;
590         }
591
592         if (sta)
593                 addr = sta->addr;
594
595         ret = p54_upload_key(priv, algo, slot, key->keyidx,
596                              key->keylen, addr, key->key);
597         if (ret) {
598                 bitmap_release_region(priv->used_rxkeys, slot, 0);
599                 ret = -EOPNOTSUPP;
600                 goto out_unlock;
601         }
602
603         key->hw_key_idx = slot;
604
605 out_unlock:
606         mutex_unlock(&priv->conf_mutex);
607         return ret;
608 }
609
610 static int p54_get_survey(struct ieee80211_hw *dev, int idx,
611                                 struct survey_info *survey)
612 {
613         struct p54_common *priv = dev->priv;
614         struct ieee80211_channel *chan;
615         int err, tries;
616         bool in_use = false;
617
618         if (idx >= priv->chan_num)
619                 return -ENOENT;
620
621 #define MAX_TRIES 1
622         for (tries = 0; tries < MAX_TRIES; tries++) {
623                 chan = priv->curchan;
624                 if (chan && chan->hw_value == idx) {
625                         mutex_lock(&priv->conf_mutex);
626                         err = p54_wait_for_stats(dev);
627                         mutex_unlock(&priv->conf_mutex);
628                         if (err)
629                                 return err;
630
631                         in_use = true;
632                 }
633
634                 memcpy(survey, &priv->survey[idx], sizeof(*survey));
635
636                 if (in_use) {
637                         /* test if the reported statistics are valid. */
638                         if  (survey->channel_time != 0) {
639                                 survey->filled |= SURVEY_INFO_IN_USE;
640                         } else {
641                                 /*
642                                  * hw/fw has not accumulated enough sample sets.
643                                  * Wait for 100ms, this ought to be enough to
644                                  * to get at least one non-null set of channel
645                                  * usage statistics.
646                                  */
647                                 msleep(100);
648                                 continue;
649                         }
650                 }
651                 return 0;
652         }
653         return -ETIMEDOUT;
654 #undef MAX_TRIES
655 }
656
657 static unsigned int p54_flush_count(struct p54_common *priv)
658 {
659         unsigned int total = 0, i;
660
661         BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats));
662
663         /*
664          * Because the firmware has the sole control over any frames
665          * in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they
666          * don't really count as pending or active.
667          */
668         for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++)
669                 total += priv->tx_stats[i].len;
670         return total;
671 }
672
673 static void p54_flush(struct ieee80211_hw *dev, u32 queues, bool drop)
674 {
675         struct p54_common *priv = dev->priv;
676         unsigned int total, i;
677
678         /*
679          * Currently, it wouldn't really matter if we wait for one second
680          * or 15 minutes. But once someone gets around and completes the
681          * TODOs [ancel stuck frames / reset device] in p54_work, it will
682          * suddenly make sense to wait that long.
683          */
684         i = P54_STATISTICS_UPDATE * 2 / 20;
685
686         /*
687          * In this case no locking is required because as we speak the
688          * queues have already been stopped and no new frames can sneak
689          * up from behind.
690          */
691         while ((total = p54_flush_count(priv) && i--)) {
692                 /* waste time */
693                 msleep(20);
694         }
695
696         WARN(total, "tx flush timeout, unresponsive firmware");
697 }
698
699 static void p54_set_coverage_class(struct ieee80211_hw *dev, u8 coverage_class)
700 {
701         struct p54_common *priv = dev->priv;
702
703         mutex_lock(&priv->conf_mutex);
704         /* support all coverage class values as in 802.11-2007 Table 7-27 */
705         priv->coverage_class = clamp_t(u8, coverage_class, 0, 31);
706         p54_set_edcf(priv);
707         mutex_unlock(&priv->conf_mutex);
708 }
709
710 static const struct ieee80211_ops p54_ops = {
711         .tx                     = p54_tx_80211,
712         .start                  = p54_start,
713         .stop                   = p54_stop,
714         .add_interface          = p54_add_interface,
715         .remove_interface       = p54_remove_interface,
716         .set_tim                = p54_set_tim,
717         .sta_notify             = p54_sta_notify,
718         .sta_add                = p54_sta_add_remove,
719         .sta_remove             = p54_sta_add_remove,
720         .set_key                = p54_set_key,
721         .config                 = p54_config,
722         .flush                  = p54_flush,
723         .bss_info_changed       = p54_bss_info_changed,
724         .prepare_multicast      = p54_prepare_multicast,
725         .configure_filter       = p54_configure_filter,
726         .conf_tx                = p54_conf_tx,
727         .get_stats              = p54_get_stats,
728         .get_survey             = p54_get_survey,
729         .set_coverage_class     = p54_set_coverage_class,
730 };
731
732 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
733 {
734         struct ieee80211_hw *dev;
735         struct p54_common *priv;
736
737         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
738         if (!dev)
739                 return NULL;
740
741         priv = dev->priv;
742         priv->hw = dev;
743         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
744         priv->basic_rate_mask = 0x15f;
745         spin_lock_init(&priv->tx_stats_lock);
746         skb_queue_head_init(&priv->tx_queue);
747         skb_queue_head_init(&priv->tx_pending);
748         dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
749                      IEEE80211_HW_SIGNAL_DBM |
750                      IEEE80211_HW_SUPPORTS_PS |
751                      IEEE80211_HW_PS_NULLFUNC_STACK |
752                      IEEE80211_HW_MFP_CAPABLE |
753                      IEEE80211_HW_REPORTS_TX_ACK_STATUS;
754
755         dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
756                                       BIT(NL80211_IFTYPE_ADHOC) |
757                                       BIT(NL80211_IFTYPE_AP) |
758                                       BIT(NL80211_IFTYPE_MESH_POINT);
759
760         dev->channel_change_time = 1000;        /* TODO: find actual value */
761         priv->beacon_req_id = cpu_to_le32(0);
762         priv->tx_stats[P54_QUEUE_BEACON].limit = 1;
763         priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1;
764         priv->tx_stats[P54_QUEUE_MGMT].limit = 3;
765         priv->tx_stats[P54_QUEUE_CAB].limit = 3;
766         priv->tx_stats[P54_QUEUE_DATA].limit = 5;
767         dev->queues = 1;
768         priv->noise = -94;
769         /*
770          * We support at most 8 tries no matter which rate they're at,
771          * we cannot support max_rates * max_rate_tries as we set it
772          * here, but setting it correctly to 4/2 or so would limit us
773          * artificially if the RC algorithm wants just two rates, so
774          * let's say 4/7, we'll redistribute it at TX time, see the
775          * comments there.
776          */
777         dev->max_rates = 4;
778         dev->max_rate_tries = 7;
779         dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
780                                  sizeof(struct p54_tx_data);
781
782         /*
783          * For now, disable PS by default because it affects
784          * link stability significantly.
785          */
786         dev->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
787
788         mutex_init(&priv->conf_mutex);
789         mutex_init(&priv->eeprom_mutex);
790         init_completion(&priv->stat_comp);
791         init_completion(&priv->eeprom_comp);
792         init_completion(&priv->beacon_comp);
793         INIT_DELAYED_WORK(&priv->work, p54_work);
794
795         memset(&priv->mc_maclist[0], ~0, ETH_ALEN);
796         priv->curchan = NULL;
797         p54_reset_stats(priv);
798         return dev;
799 }
800 EXPORT_SYMBOL_GPL(p54_init_common);
801
802 int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
803 {
804         struct p54_common __maybe_unused *priv = dev->priv;
805         int err;
806
807         err = ieee80211_register_hw(dev);
808         if (err) {
809                 dev_err(pdev, "Cannot register device (%d).\n", err);
810                 return err;
811         }
812         priv->registered = true;
813
814 #ifdef CONFIG_P54_LEDS
815         err = p54_init_leds(priv);
816         if (err) {
817                 p54_unregister_common(dev);
818                 return err;
819         }
820 #endif /* CONFIG_P54_LEDS */
821
822         dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
823         return 0;
824 }
825 EXPORT_SYMBOL_GPL(p54_register_common);
826
827 void p54_free_common(struct ieee80211_hw *dev)
828 {
829         struct p54_common *priv = dev->priv;
830         unsigned int i;
831
832         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
833                 kfree(priv->band_table[i]);
834
835         kfree(priv->iq_autocal);
836         kfree(priv->output_limit);
837         kfree(priv->curve_data);
838         kfree(priv->rssi_db);
839         kfree(priv->used_rxkeys);
840         kfree(priv->survey);
841         priv->iq_autocal = NULL;
842         priv->output_limit = NULL;
843         priv->curve_data = NULL;
844         priv->rssi_db = NULL;
845         priv->used_rxkeys = NULL;
846         priv->survey = NULL;
847         ieee80211_free_hw(dev);
848 }
849 EXPORT_SYMBOL_GPL(p54_free_common);
850
851 void p54_unregister_common(struct ieee80211_hw *dev)
852 {
853         struct p54_common *priv = dev->priv;
854
855 #ifdef CONFIG_P54_LEDS
856         p54_unregister_leds(priv);
857 #endif /* CONFIG_P54_LEDS */
858
859         if (priv->registered) {
860                 priv->registered = false;
861                 ieee80211_unregister_hw(dev);
862         }
863
864         mutex_destroy(&priv->conf_mutex);
865         mutex_destroy(&priv->eeprom_mutex);
866 }
867 EXPORT_SYMBOL_GPL(p54_unregister_common);