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path: root/drivers/net/wireless/p54/main.c
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Diffstat (limited to 'drivers/net/wireless/p54/main.c')
-rw-r--r--drivers/net/wireless/p54/main.c607
1 files changed, 607 insertions, 0 deletions
diff --git a/drivers/net/wireless/p54/main.c b/drivers/net/wireless/p54/main.c
new file mode 100644
index 000000000000..f9b4f6a238ea
--- /dev/null
+++ b/drivers/net/wireless/p54/main.c
@@ -0,0 +1,607 @@
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
28static int modparam_nohwcrypt;
29module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
30MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
31MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
32MODULE_DESCRIPTION("Softmac Prism54 common code");
33MODULE_LICENSE("GPL");
34MODULE_ALIAS("prism54common");
35
36static 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
60static 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
68static int p54_beacon_format_ie_tim(struct sk_buff *skb)
69{
70 /*
71 * the good excuse for this mess is ... the firmware.
72 * The dummy TIM MUST be at the end of the beacon frame,
73 * because it'll be overwritten!
74 */
75
76 struct ieee80211_mgmt *mgmt = (void *)skb->data;
77 u8 *pos, *end;
78
79 if (skb->len <= sizeof(mgmt))
80 return -EINVAL;
81
82 pos = (u8 *)mgmt->u.beacon.variable;
83 end = skb->data + skb->len;
84 while (pos < end) {
85 if (pos + 2 + pos[1] > end)
86 return -EINVAL;
87
88 if (pos[0] == WLAN_EID_TIM) {
89 u8 dtim_len = pos[1];
90 u8 dtim_period = pos[3];
91 u8 *next = pos + 2 + dtim_len;
92
93 if (dtim_len < 3)
94 return -EINVAL;
95
96 memmove(pos, next, end - next);
97
98 if (dtim_len > 3)
99 skb_trim(skb, skb->len - (dtim_len - 3));
100
101 pos = end - (dtim_len + 2);
102
103 /* add the dummy at the end */
104 pos[0] = WLAN_EID_TIM;
105 pos[1] = 3;
106 pos[2] = 0;
107 pos[3] = dtim_period;
108 pos[4] = 0;
109 return 0;
110 }
111 pos += 2 + pos[1];
112 }
113 return 0;
114}
115
116static int p54_beacon_update(struct p54_common *priv,
117 struct ieee80211_vif *vif)
118{
119 struct sk_buff *beacon;
120 __le32 old_beacon_req_id;
121 int ret;
122
123 beacon = ieee80211_beacon_get(priv->hw, vif);
124 if (!beacon)
125 return -ENOMEM;
126 ret = p54_beacon_format_ie_tim(beacon);
127 if (ret)
128 return ret;
129
130 old_beacon_req_id = priv->beacon_req_id;
131 priv->beacon_req_id = GET_REQ_ID(beacon);
132
133 ret = p54_tx_80211(priv->hw, beacon);
134 if (ret) {
135 priv->beacon_req_id = old_beacon_req_id;
136 return -ENOSPC;
137 }
138
139 priv->tsf_high32 = 0;
140 priv->tsf_low32 = 0;
141
142 return 0;
143}
144
145static int p54_start(struct ieee80211_hw *dev)
146{
147 struct p54_common *priv = dev->priv;
148 int err;
149
150 mutex_lock(&priv->conf_mutex);
151 err = priv->open(dev);
152 if (err)
153 goto out;
154 P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
155 P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
156 P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
157 P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
158 err = p54_set_edcf(priv);
159 if (err)
160 goto out;
161
162 memset(priv->bssid, ~0, ETH_ALEN);
163 priv->mode = NL80211_IFTYPE_MONITOR;
164 err = p54_setup_mac(priv);
165 if (err) {
166 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
167 goto out;
168 }
169
170 queue_delayed_work(dev->workqueue, &priv->work, 0);
171
172 priv->softled_state = 0;
173 err = p54_set_leds(priv);
174
175out:
176 mutex_unlock(&priv->conf_mutex);
177 return err;
178}
179
180static void p54_stop(struct ieee80211_hw *dev)
181{
182 struct p54_common *priv = dev->priv;
183 int i;
184
185 mutex_lock(&priv->conf_mutex);
186 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
187 priv->softled_state = 0;
188 p54_set_leds(priv);
189
190 cancel_delayed_work_sync(&priv->work);
191
192 priv->stop(dev);
193 skb_queue_purge(&priv->tx_pending);
194 skb_queue_purge(&priv->tx_queue);
195 for (i = 0; i < P54_QUEUE_NUM; i++) {
196 priv->tx_stats[i].count = 0;
197 priv->tx_stats[i].len = 0;
198 }
199
200 priv->beacon_req_id = cpu_to_le32(0);
201 priv->tsf_high32 = priv->tsf_low32 = 0;
202 mutex_unlock(&priv->conf_mutex);
203}
204
205static int p54_add_interface(struct ieee80211_hw *dev,
206 struct ieee80211_if_init_conf *conf)
207{
208 struct p54_common *priv = dev->priv;
209
210 mutex_lock(&priv->conf_mutex);
211 if (priv->mode != NL80211_IFTYPE_MONITOR) {
212 mutex_unlock(&priv->conf_mutex);
213 return -EOPNOTSUPP;
214 }
215
216 priv->vif = conf->vif;
217
218 switch (conf->type) {
219 case NL80211_IFTYPE_STATION:
220 case NL80211_IFTYPE_ADHOC:
221 case NL80211_IFTYPE_AP:
222 case NL80211_IFTYPE_MESH_POINT:
223 priv->mode = conf->type;
224 break;
225 default:
226 mutex_unlock(&priv->conf_mutex);
227 return -EOPNOTSUPP;
228 }
229
230 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
231 p54_setup_mac(priv);
232 mutex_unlock(&priv->conf_mutex);
233 return 0;
234}
235
236static void p54_remove_interface(struct ieee80211_hw *dev,
237 struct ieee80211_if_init_conf *conf)
238{
239 struct p54_common *priv = dev->priv;
240
241 mutex_lock(&priv->conf_mutex);
242 priv->vif = NULL;
243 if (priv->beacon_req_id) {
244 p54_tx_cancel(priv, priv->beacon_req_id);
245 priv->beacon_req_id = cpu_to_le32(0);
246 }
247 priv->mode = NL80211_IFTYPE_MONITOR;
248 memset(priv->mac_addr, 0, ETH_ALEN);
249 memset(priv->bssid, 0, ETH_ALEN);
250 p54_setup_mac(priv);
251 mutex_unlock(&priv->conf_mutex);
252}
253
254static int p54_config(struct ieee80211_hw *dev, u32 changed)
255{
256 int ret = 0;
257 struct p54_common *priv = dev->priv;
258 struct ieee80211_conf *conf = &dev->conf;
259
260 mutex_lock(&priv->conf_mutex);
261 if (changed & IEEE80211_CONF_CHANGE_POWER)
262 priv->output_power = conf->power_level << 2;
263 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
264 ret = p54_scan(priv, P54_SCAN_EXIT, 0);
265 if (ret)
266 goto out;
267 }
268 if (changed & IEEE80211_CONF_CHANGE_PS) {
269 ret = p54_set_ps(priv);
270 if (ret)
271 goto out;
272 }
273
274out:
275 mutex_unlock(&priv->conf_mutex);
276 return ret;
277}
278
279static void p54_configure_filter(struct ieee80211_hw *dev,
280 unsigned int changed_flags,
281 unsigned int *total_flags,
282 int mc_count, struct dev_mc_list *mclist)
283{
284 struct p54_common *priv = dev->priv;
285
286 *total_flags &= FIF_PROMISC_IN_BSS |
287 FIF_OTHER_BSS;
288
289 priv->filter_flags = *total_flags;
290
291 if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS))
292 p54_setup_mac(priv);
293}
294
295static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
296 const struct ieee80211_tx_queue_params *params)
297{
298 struct p54_common *priv = dev->priv;
299 int ret;
300
301 mutex_lock(&priv->conf_mutex);
302 if ((params) && !(queue > 4)) {
303 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
304 params->cw_min, params->cw_max, params->txop);
305 ret = p54_set_edcf(priv);
306 } else
307 ret = -EINVAL;
308 mutex_unlock(&priv->conf_mutex);
309 return ret;
310}
311
312static void p54_work(struct work_struct *work)
313{
314 struct p54_common *priv = container_of(work, struct p54_common,
315 work.work);
316
317 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
318 return ;
319
320 /*
321 * TODO: walk through tx_queue and do the following tasks
322 * 1. initiate bursts.
323 * 2. cancel stuck frames / reset the device if necessary.
324 */
325
326 p54_fetch_statistics(priv);
327}
328
329static int p54_get_stats(struct ieee80211_hw *dev,
330 struct ieee80211_low_level_stats *stats)
331{
332 struct p54_common *priv = dev->priv;
333
334 memcpy(stats, &priv->stats, sizeof(*stats));
335 return 0;
336}
337
338static int p54_get_tx_stats(struct ieee80211_hw *dev,
339 struct ieee80211_tx_queue_stats *stats)
340{
341 struct p54_common *priv = dev->priv;
342
343 memcpy(stats, &priv->tx_stats[P54_QUEUE_DATA],
344 sizeof(stats[0]) * dev->queues);
345 return 0;
346}
347
348static void p54_bss_info_changed(struct ieee80211_hw *dev,
349 struct ieee80211_vif *vif,
350 struct ieee80211_bss_conf *info,
351 u32 changed)
352{
353 struct p54_common *priv = dev->priv;
354
355 mutex_lock(&priv->conf_mutex);
356 if (changed & BSS_CHANGED_BSSID) {
357 memcpy(priv->bssid, info->bssid, ETH_ALEN);
358 p54_setup_mac(priv);
359 }
360
361 if (changed & BSS_CHANGED_BEACON) {
362 p54_scan(priv, P54_SCAN_EXIT, 0);
363 p54_setup_mac(priv);
364 p54_beacon_update(priv, vif);
365 p54_set_edcf(priv);
366 }
367
368 if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {
369 priv->use_short_slot = info->use_short_slot;
370 p54_set_edcf(priv);
371 }
372 if (changed & BSS_CHANGED_BASIC_RATES) {
373 if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
374 priv->basic_rate_mask = (info->basic_rates << 4);
375 else
376 priv->basic_rate_mask = info->basic_rates;
377 p54_setup_mac(priv);
378 if (priv->fw_var >= 0x500)
379 p54_scan(priv, P54_SCAN_EXIT, 0);
380 }
381 if (changed & BSS_CHANGED_ASSOC) {
382 if (info->assoc) {
383 priv->aid = info->aid;
384 priv->wakeup_timer = info->beacon_int *
385 info->dtim_period * 5;
386 p54_setup_mac(priv);
387 }
388 }
389
390 mutex_unlock(&priv->conf_mutex);
391}
392
393static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
394 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
395 struct ieee80211_key_conf *key)
396{
397 struct p54_common *priv = dev->priv;
398 int slot, ret = 0;
399 u8 algo = 0;
400 u8 *addr = NULL;
401
402 if (modparam_nohwcrypt)
403 return -EOPNOTSUPP;
404
405 mutex_lock(&priv->conf_mutex);
406 if (cmd == SET_KEY) {
407 switch (key->alg) {
408 case ALG_TKIP:
409 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
410 BR_DESC_PRIV_CAP_TKIP))) {
411 ret = -EOPNOTSUPP;
412 goto out_unlock;
413 }
414 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
415 algo = P54_CRYPTO_TKIPMICHAEL;
416 break;
417 case ALG_WEP:
418 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {
419 ret = -EOPNOTSUPP;
420 goto out_unlock;
421 }
422 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
423 algo = P54_CRYPTO_WEP;
424 break;
425 case ALG_CCMP:
426 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {
427 ret = -EOPNOTSUPP;
428 goto out_unlock;
429 }
430 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
431 algo = P54_CRYPTO_AESCCMP;
432 break;
433 default:
434 ret = -EOPNOTSUPP;
435 goto out_unlock;
436 }
437 slot = bitmap_find_free_region(priv->used_rxkeys,
438 priv->rx_keycache_size, 0);
439
440 if (slot < 0) {
441 /*
442 * The device supports the choosen algorithm, but the
443 * firmware does not provide enough key slots to store
444 * all of them.
445 * But encryption offload for outgoing frames is always
446 * possible, so we just pretend that the upload was
447 * successful and do the decryption in software.
448 */
449
450 /* mark the key as invalid. */
451 key->hw_key_idx = 0xff;
452 goto out_unlock;
453 }
454 } else {
455 slot = key->hw_key_idx;
456
457 if (slot == 0xff) {
458 /* This key was not uploaded into the rx key cache. */
459
460 goto out_unlock;
461 }
462
463 bitmap_release_region(priv->used_rxkeys, slot, 0);
464 algo = 0;
465 }
466
467 if (sta)
468 addr = sta->addr;
469
470 ret = p54_upload_key(priv, algo, slot, key->keyidx,
471 key->keylen, addr, key->key);
472 if (ret) {
473 bitmap_release_region(priv->used_rxkeys, slot, 0);
474 ret = -EOPNOTSUPP;
475 goto out_unlock;
476 }
477
478 key->hw_key_idx = slot;
479
480out_unlock:
481 mutex_unlock(&priv->conf_mutex);
482 return ret;
483}
484
485static const struct ieee80211_ops p54_ops = {
486 .tx = p54_tx_80211,
487 .start = p54_start,
488 .stop = p54_stop,
489 .add_interface = p54_add_interface,
490 .remove_interface = p54_remove_interface,
491 .set_tim = p54_set_tim,
492 .sta_notify = p54_sta_notify,
493 .set_key = p54_set_key,
494 .config = p54_config,
495 .bss_info_changed = p54_bss_info_changed,
496 .configure_filter = p54_configure_filter,
497 .conf_tx = p54_conf_tx,
498 .get_stats = p54_get_stats,
499 .get_tx_stats = p54_get_tx_stats
500};
501
502struct ieee80211_hw *p54_init_common(size_t priv_data_len)
503{
504 struct ieee80211_hw *dev;
505 struct p54_common *priv;
506
507 dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
508 if (!dev)
509 return NULL;
510
511 priv = dev->priv;
512 priv->hw = dev;
513 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
514 priv->basic_rate_mask = 0x15f;
515 spin_lock_init(&priv->tx_stats_lock);
516 skb_queue_head_init(&priv->tx_queue);
517 skb_queue_head_init(&priv->tx_pending);
518 dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
519 IEEE80211_HW_SIGNAL_DBM |
520 IEEE80211_HW_NOISE_DBM;
521
522 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
523 BIT(NL80211_IFTYPE_ADHOC) |
524 BIT(NL80211_IFTYPE_AP) |
525 BIT(NL80211_IFTYPE_MESH_POINT);
526
527 dev->channel_change_time = 1000; /* TODO: find actual value */
528 priv->tx_stats[P54_QUEUE_BEACON].limit = 1;
529 priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1;
530 priv->tx_stats[P54_QUEUE_MGMT].limit = 3;
531 priv->tx_stats[P54_QUEUE_CAB].limit = 3;
532 priv->tx_stats[P54_QUEUE_DATA].limit = 5;
533 dev->queues = 1;
534 priv->noise = -94;
535 /*
536 * We support at most 8 tries no matter which rate they're at,
537 * we cannot support max_rates * max_rate_tries as we set it
538 * here, but setting it correctly to 4/2 or so would limit us
539 * artificially if the RC algorithm wants just two rates, so
540 * let's say 4/7, we'll redistribute it at TX time, see the
541 * comments there.
542 */
543 dev->max_rates = 4;
544 dev->max_rate_tries = 7;
545 dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
546 sizeof(struct p54_tx_data);
547
548 mutex_init(&priv->conf_mutex);
549 mutex_init(&priv->eeprom_mutex);
550 init_completion(&priv->eeprom_comp);
551 INIT_DELAYED_WORK(&priv->work, p54_work);
552
553 return dev;
554}
555EXPORT_SYMBOL_GPL(p54_init_common);
556
557int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
558{
559 struct p54_common *priv = dev->priv;
560 int err;
561
562 err = ieee80211_register_hw(dev);
563 if (err) {
564 dev_err(pdev, "Cannot register device (%d).\n", err);
565 return err;
566 }
567
568#ifdef CONFIG_P54_LEDS
569 err = p54_init_leds(priv);
570 if (err)
571 return err;
572#endif /* CONFIG_P54_LEDS */
573
574 dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
575 return 0;
576}
577EXPORT_SYMBOL_GPL(p54_register_common);
578
579void p54_free_common(struct ieee80211_hw *dev)
580{
581 struct p54_common *priv = dev->priv;
582
583 kfree(priv->iq_autocal);
584 kfree(priv->output_limit);
585 kfree(priv->curve_data);
586 kfree(priv->used_rxkeys);
587 priv->iq_autocal = NULL;
588 priv->output_limit = NULL;
589 priv->curve_data = NULL;
590 priv->used_rxkeys = NULL;
591 ieee80211_free_hw(dev);
592}
593EXPORT_SYMBOL_GPL(p54_free_common);
594
595void p54_unregister_common(struct ieee80211_hw *dev)
596{
597 struct p54_common *priv = dev->priv;
598
599#ifdef CONFIG_P54_LEDS
600 p54_unregister_leds(priv);
601#endif /* CONFIG_P54_LEDS */
602
603 ieee80211_unregister_hw(dev);
604 mutex_destroy(&priv->conf_mutex);
605 mutex_destroy(&priv->eeprom_mutex);
606}
607EXPORT_SYMBOL_GPL(p54_unregister_common);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-26 09:41:37 -0500