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p54: implement rfkill
[linux/fpc-iii.git] / drivers / net / wireless / p54 / main.c
blob4a741df9c081e08efeec3c1e9bb917716bcbebec
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/firmware.h>
21 #include <linux/etherdevice.h>
22
23 #include <net/mac80211.h>
24
25 #include "p54.h"
26 #include "lmac.h"
27
28 static int modparam_nohwcrypt;
29 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
30 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
31 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
32 MODULE_DESCRIPTION("Softmac Prism54 common code");
33 MODULE_LICENSE("GPL");
34 MODULE_ALIAS("prism54common");
35
36 static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
37 enum sta_notify_cmd notify_cmd,
38 struct ieee80211_sta *sta)
39 {
40 struct p54_common *priv = dev->priv;
41 switch (notify_cmd) {
42 case STA_NOTIFY_ADD:
43 case STA_NOTIFY_REMOVE:
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 break;
51 case STA_NOTIFY_AWAKE:
52 /* update the firmware's filter table */
53 p54_sta_unlock(priv, sta->addr);
54 break;
55 default:
56 break;
57 }
58 }
59
60 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
61 bool set)
62 {
63 struct p54_common *priv = dev->priv;
64
65 return p54_update_beacon_tim(priv, sta->aid, set);
66 }
67
68 u8 *p54_find_ie(struct sk_buff *skb, u8 ie)
69 {
70 struct ieee80211_mgmt *mgmt = (void *)skb->data;
71 u8 *pos, *end;
72
73 if (skb->len <= sizeof(mgmt))
74 return NULL;
75
76 pos = (u8 *)mgmt->u.beacon.variable;
77 end = skb->data + skb->len;
78 while (pos < end) {
79 if (pos + 2 + pos[1] > end)
80 return NULL;
81
82 if (pos[0] == ie)
83 return pos;
84
85 pos += 2 + pos[1];
86 }
87 return NULL;
88 }
89
90 static int p54_beacon_format_ie_tim(struct sk_buff *skb)
91 {
92 /*
93 * the good excuse for this mess is ... the firmware.
94 * The dummy TIM MUST be at the end of the beacon frame,
95 * because it'll be overwritten!
96 */
97 u8 *tim;
98 u8 dtim_len;
99 u8 dtim_period;
100 u8 *next;
101
102 tim = p54_find_ie(skb, WLAN_EID_TIM);
103 if (!tim)
104 return 0;
105
106 dtim_len = tim[1];
107 dtim_period = tim[3];
108 next = tim + 2 + dtim_len;
109
110 if (dtim_len < 3)
111 return -EINVAL;
112
113 memmove(tim, next, skb_tail_pointer(skb) - next);
114 tim = skb_tail_pointer(skb) - (dtim_len + 2);
115
116 /* add the dummy at the end */
117 tim[0] = WLAN_EID_TIM;
118 tim[1] = 3;
119 tim[2] = 0;
120 tim[3] = dtim_period;
121 tim[4] = 0;
122
123 if (dtim_len > 3)
124 skb_trim(skb, skb->len - (dtim_len - 3));
125
126 return 0;
127 }
128
129 static int p54_beacon_update(struct p54_common *priv,
130 struct ieee80211_vif *vif)
131 {
132 struct sk_buff *beacon;
133 int ret;
134
135 beacon = ieee80211_beacon_get(priv->hw, vif);
136 if (!beacon)
137 return -ENOMEM;
138 ret = p54_beacon_format_ie_tim(beacon);
139 if (ret)
140 return ret;
141
142 /*
143 * During operation, the firmware takes care of beaconing.
144 * The driver only needs to upload a new beacon template, once
145 * the template was changed by the stack or userspace.
146 *
147 * LMAC API 3.2.2 also specifies that the driver does not need
148 * to cancel the old beacon template by hand, instead the firmware
149 * will release the previous one through the feedback mechanism.
150 */
151 WARN_ON(p54_tx_80211(priv->hw, beacon));
152 priv->tsf_high32 = 0;
153 priv->tsf_low32 = 0;
154
155 return 0;
156 }
157
158 static int p54_start(struct ieee80211_hw *dev)
159 {
160 struct p54_common *priv = dev->priv;
161 int err;
162
163 mutex_lock(&priv->conf_mutex);
164 err = priv->open(dev);
165 if (err)
166 goto out;
167 P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
168 P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
169 P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
170 P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
171 err = p54_set_edcf(priv);
172 if (err)
173 goto out;
174
175 memset(priv->bssid, ~0, ETH_ALEN);
176 priv->mode = NL80211_IFTYPE_MONITOR;
177 err = p54_setup_mac(priv);
178 if (err) {
179 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
180 goto out;
181 }
182
183 ieee80211_queue_delayed_work(dev, &priv->work, 0);
184
185 priv->softled_state = 0;
186 err = p54_set_leds(priv);
187
188 out:
189 mutex_unlock(&priv->conf_mutex);
190 return err;
191 }
192
193 static void p54_stop(struct ieee80211_hw *dev)
194 {
195 struct p54_common *priv = dev->priv;
196 int i;
197
198 mutex_lock(&priv->conf_mutex);
199 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
200 priv->softled_state = 0;
201 p54_set_leds(priv);
202
203 cancel_delayed_work_sync(&priv->work);
204
205 priv->stop(dev);
206 skb_queue_purge(&priv->tx_pending);
207 skb_queue_purge(&priv->tx_queue);
208 for (i = 0; i < P54_QUEUE_NUM; i++) {
209 priv->tx_stats[i].count = 0;
210 priv->tx_stats[i].len = 0;
211 }
212
213 priv->beacon_req_id = cpu_to_le32(0);
214 priv->tsf_high32 = priv->tsf_low32 = 0;
215 mutex_unlock(&priv->conf_mutex);
216 }
217
218 static int p54_add_interface(struct ieee80211_hw *dev,
219 struct ieee80211_if_init_conf *conf)
220 {
221 struct p54_common *priv = dev->priv;
222
223 mutex_lock(&priv->conf_mutex);
224 if (priv->mode != NL80211_IFTYPE_MONITOR) {
225 mutex_unlock(&priv->conf_mutex);
226 return -EOPNOTSUPP;
227 }
228
229 priv->vif = conf->vif;
230
231 switch (conf->type) {
232 case NL80211_IFTYPE_STATION:
233 case NL80211_IFTYPE_ADHOC:
234 case NL80211_IFTYPE_AP:
235 case NL80211_IFTYPE_MESH_POINT:
236 priv->mode = conf->type;
237 break;
238 default:
239 mutex_unlock(&priv->conf_mutex);
240 return -EOPNOTSUPP;
241 }
242
243 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
244 p54_setup_mac(priv);
245 mutex_unlock(&priv->conf_mutex);
246 return 0;
247 }
248
249 static void p54_remove_interface(struct ieee80211_hw *dev,
250 struct ieee80211_if_init_conf *conf)
251 {
252 struct p54_common *priv = dev->priv;
253
254 mutex_lock(&priv->conf_mutex);
255 priv->vif = NULL;
256
257 /*
258 * LMAC API 3.2.2 states that any active beacon template must be
259 * canceled by the driver before attempting a mode transition.
260 */
261 if (le32_to_cpu(priv->beacon_req_id) != 0) {
262 p54_tx_cancel(priv, priv->beacon_req_id);
263 wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ);
264 }
265 priv->mode = NL80211_IFTYPE_MONITOR;
266 memset(priv->mac_addr, 0, ETH_ALEN);
267 memset(priv->bssid, 0, ETH_ALEN);
268 p54_setup_mac(priv);
269 mutex_unlock(&priv->conf_mutex);
270 }
271
272 static int p54_config(struct ieee80211_hw *dev, u32 changed)
273 {
274 int ret = 0;
275 struct p54_common *priv = dev->priv;
276 struct ieee80211_conf *conf = &dev->conf;
277
278 mutex_lock(&priv->conf_mutex);
279 if (changed & IEEE80211_CONF_CHANGE_POWER)
280 priv->output_power = conf->power_level << 2;
281 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
282 ret = p54_scan(priv, P54_SCAN_EXIT, 0);
283 if (ret)
284 goto out;
285 }
286 if (changed & IEEE80211_CONF_CHANGE_PS) {
287 ret = p54_set_ps(priv);
288 if (ret)
289 goto out;
290 }
291 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
292 ret = p54_setup_mac(priv);
293 if (ret)
294 goto out;
295 }
296
297 out:
298 mutex_unlock(&priv->conf_mutex);
299 return ret;
300 }
301
302 static void p54_configure_filter(struct ieee80211_hw *dev,
303 unsigned int changed_flags,
304 unsigned int *total_flags,
305 int mc_count, struct dev_mc_list *mclist)
306 {
307 struct p54_common *priv = dev->priv;
308
309 *total_flags &= FIF_PROMISC_IN_BSS |
310 FIF_OTHER_BSS;
311
312 priv->filter_flags = *total_flags;
313
314 if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS))
315 p54_setup_mac(priv);
316 }
317
318 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
319 const struct ieee80211_tx_queue_params *params)
320 {
321 struct p54_common *priv = dev->priv;
322 int ret;
323
324 mutex_lock(&priv->conf_mutex);
325 if (queue < dev->queues) {
326 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
327 params->cw_min, params->cw_max, params->txop);
328 ret = p54_set_edcf(priv);
329 } else
330 ret = -EINVAL;
331 mutex_unlock(&priv->conf_mutex);
332 return ret;
333 }
334
335 static void p54_work(struct work_struct *work)
336 {
337 struct p54_common *priv = container_of(work, struct p54_common,
338 work.work);
339
340 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
341 return ;
342
343 /*
344 * TODO: walk through tx_queue and do the following tasks
345 * 1. initiate bursts.
346 * 2. cancel stuck frames / reset the device if necessary.
347 */
348
349 p54_fetch_statistics(priv);
350 }
351
352 static int p54_get_stats(struct ieee80211_hw *dev,
353 struct ieee80211_low_level_stats *stats)
354 {
355 struct p54_common *priv = dev->priv;
356
357 memcpy(stats, &priv->stats, sizeof(*stats));
358 return 0;
359 }
360
361 static int p54_get_tx_stats(struct ieee80211_hw *dev,
362 struct ieee80211_tx_queue_stats *stats)
363 {
364 struct p54_common *priv = dev->priv;
365
366 memcpy(stats, &priv->tx_stats[P54_QUEUE_DATA],
367 sizeof(stats[0]) * dev->queues);
368 return 0;
369 }
370
371 static void p54_bss_info_changed(struct ieee80211_hw *dev,
372 struct ieee80211_vif *vif,
373 struct ieee80211_bss_conf *info,
374 u32 changed)
375 {
376 struct p54_common *priv = dev->priv;
377
378 mutex_lock(&priv->conf_mutex);
379 if (changed & BSS_CHANGED_BSSID) {
380 memcpy(priv->bssid, info->bssid, ETH_ALEN);
381 p54_setup_mac(priv);
382 }
383
384 if (changed & BSS_CHANGED_BEACON) {
385 p54_scan(priv, P54_SCAN_EXIT, 0);
386 p54_setup_mac(priv);
387 p54_beacon_update(priv, vif);
388 p54_set_edcf(priv);
389 }
390
391 if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {
392 priv->use_short_slot = info->use_short_slot;
393 p54_set_edcf(priv);
394 }
395 if (changed & BSS_CHANGED_BASIC_RATES) {
396 if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
397 priv->basic_rate_mask = (info->basic_rates << 4);
398 else
399 priv->basic_rate_mask = info->basic_rates;
400 p54_setup_mac(priv);
401 if (priv->fw_var >= 0x500)
402 p54_scan(priv, P54_SCAN_EXIT, 0);
403 }
404 if (changed & BSS_CHANGED_ASSOC) {
405 if (info->assoc) {
406 priv->aid = info->aid;
407 priv->wakeup_timer = info->beacon_int *
408 info->dtim_period * 5;
409 p54_setup_mac(priv);
410 } else {
411 priv->wakeup_timer = 500;
412 priv->aid = 0;
413 }
414 }
415
416 mutex_unlock(&priv->conf_mutex);
417 }
418
419 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
420 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
421 struct ieee80211_key_conf *key)
422 {
423 struct p54_common *priv = dev->priv;
424 int slot, ret = 0;
425 u8 algo = 0;
426 u8 *addr = NULL;
427
428 if (modparam_nohwcrypt)
429 return -EOPNOTSUPP;
430
431 mutex_lock(&priv->conf_mutex);
432 if (cmd == SET_KEY) {
433 switch (key->alg) {
434 case ALG_TKIP:
435 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
436 BR_DESC_PRIV_CAP_TKIP))) {
437 ret = -EOPNOTSUPP;
438 goto out_unlock;
439 }
440 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
441 algo = P54_CRYPTO_TKIPMICHAEL;
442 break;
443 case ALG_WEP:
444 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {
445 ret = -EOPNOTSUPP;
446 goto out_unlock;
447 }
448 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
449 algo = P54_CRYPTO_WEP;
450 break;
451 case ALG_CCMP:
452 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {
453 ret = -EOPNOTSUPP;
454 goto out_unlock;
455 }
456 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
457 algo = P54_CRYPTO_AESCCMP;
458 break;
459 default:
460 ret = -EOPNOTSUPP;
461 goto out_unlock;
462 }
463 slot = bitmap_find_free_region(priv->used_rxkeys,
464 priv->rx_keycache_size, 0);
465
466 if (slot < 0) {
467 /*
468 * The device supports the choosen algorithm, but the
469 * firmware does not provide enough key slots to store
470 * all of them.
471 * But encryption offload for outgoing frames is always
472 * possible, so we just pretend that the upload was
473 * successful and do the decryption in software.
474 */
475
476 /* mark the key as invalid. */
477 key->hw_key_idx = 0xff;
478 goto out_unlock;
479 }
480 } else {
481 slot = key->hw_key_idx;
482
483 if (slot == 0xff) {
484 /* This key was not uploaded into the rx key cache. */
485
486 goto out_unlock;
487 }
488
489 bitmap_release_region(priv->used_rxkeys, slot, 0);
490 algo = 0;
491 }
492
493 if (sta)
494 addr = sta->addr;
495
496 ret = p54_upload_key(priv, algo, slot, key->keyidx,
497 key->keylen, addr, key->key);
498 if (ret) {
499 bitmap_release_region(priv->used_rxkeys, slot, 0);
500 ret = -EOPNOTSUPP;
501 goto out_unlock;
502 }
503
504 key->hw_key_idx = slot;
505
506 out_unlock:
507 mutex_unlock(&priv->conf_mutex);
508 return ret;
509 }
510
511 static const struct ieee80211_ops p54_ops = {
512 .tx = p54_tx_80211,
513 .start = p54_start,
514 .stop = p54_stop,
515 .add_interface = p54_add_interface,
516 .remove_interface = p54_remove_interface,
517 .set_tim = p54_set_tim,
518 .sta_notify = p54_sta_notify,
519 .set_key = p54_set_key,
520 .config = p54_config,
521 .bss_info_changed = p54_bss_info_changed,
522 .configure_filter = p54_configure_filter,
523 .conf_tx = p54_conf_tx,
524 .get_stats = p54_get_stats,
525 .get_tx_stats = p54_get_tx_stats
526 };
527
528 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
529 {
530 struct ieee80211_hw *dev;
531 struct p54_common *priv;
532
533 dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
534 if (!dev)
535 return NULL;
536
537 priv = dev->priv;
538 priv->hw = dev;
539 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
540 priv->basic_rate_mask = 0x15f;
541 spin_lock_init(&priv->tx_stats_lock);
542 skb_queue_head_init(&priv->tx_queue);
543 skb_queue_head_init(&priv->tx_pending);
544 dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
545 IEEE80211_HW_SIGNAL_DBM |
546 IEEE80211_HW_SUPPORTS_PS |
547 IEEE80211_HW_PS_NULLFUNC_STACK |
548 IEEE80211_HW_BEACON_FILTER |
549 IEEE80211_HW_NOISE_DBM;
550
551 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
552 BIT(NL80211_IFTYPE_ADHOC) |
553 BIT(NL80211_IFTYPE_AP) |
554 BIT(NL80211_IFTYPE_MESH_POINT);
555
556 dev->channel_change_time = 1000; /* TODO: find actual value */
557 priv->beacon_req_id = cpu_to_le32(0);
558 priv->tx_stats[P54_QUEUE_BEACON].limit = 1;
559 priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1;
560 priv->tx_stats[P54_QUEUE_MGMT].limit = 3;
561 priv->tx_stats[P54_QUEUE_CAB].limit = 3;
562 priv->tx_stats[P54_QUEUE_DATA].limit = 5;
563 dev->queues = 1;
564 priv->noise = -94;
565 /*
566 * We support at most 8 tries no matter which rate they're at,
567 * we cannot support max_rates * max_rate_tries as we set it
568 * here, but setting it correctly to 4/2 or so would limit us
569 * artificially if the RC algorithm wants just two rates, so
570 * let's say 4/7, we'll redistribute it at TX time, see the
571 * comments there.
572 */
573 dev->max_rates = 4;
574 dev->max_rate_tries = 7;
575 dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
576 sizeof(struct p54_tx_data);
577
578 mutex_init(&priv->conf_mutex);
579 mutex_init(&priv->eeprom_mutex);
580 init_completion(&priv->eeprom_comp);
581 init_completion(&priv->beacon_comp);
582 INIT_DELAYED_WORK(&priv->work, p54_work);
583
584 return dev;
585 }
586 EXPORT_SYMBOL_GPL(p54_init_common);
587
588 int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
589 {
590 struct p54_common *priv = dev->priv;
591 int err;
592
593 err = ieee80211_register_hw(dev);
594 if (err) {
595 dev_err(pdev, "Cannot register device (%d).\n", err);
596 return err;
597 }
598
599 #ifdef CONFIG_P54_LEDS
600 err = p54_init_leds(priv);
601 if (err)
602 return err;
603 #endif /* CONFIG_P54_LEDS */
604
605 dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
606 return 0;
607 }
608 EXPORT_SYMBOL_GPL(p54_register_common);
609
610 void p54_free_common(struct ieee80211_hw *dev)
611 {
612 struct p54_common *priv = dev->priv;
613 unsigned int i;
614
615 for (i = 0; i < IEEE80211_NUM_BANDS; i++)
616 kfree(priv->band_table[i]);
617
618 kfree(priv->iq_autocal);
619 kfree(priv->output_limit);
620 kfree(priv->curve_data);
621 kfree(priv->used_rxkeys);
622 priv->iq_autocal = NULL;
623 priv->output_limit = NULL;
624 priv->curve_data = NULL;
625 priv->used_rxkeys = NULL;
626 ieee80211_free_hw(dev);
627 }
628 EXPORT_SYMBOL_GPL(p54_free_common);
629
630 void p54_unregister_common(struct ieee80211_hw *dev)
631 {
632 struct p54_common *priv = dev->priv;
633
634 #ifdef CONFIG_P54_LEDS
635 p54_unregister_leds(priv);
636 #endif /* CONFIG_P54_LEDS */
637
638 ieee80211_unregister_hw(dev);
639 mutex_destroy(&priv->conf_mutex);
640 mutex_destroy(&priv->eeprom_mutex);
641 }
642 EXPORT_SYMBOL_GPL(p54_unregister_common);
Linux with added FPC-III support