2 * mac80211 glue code for mac80211 Prism54 drivers
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>
9 * - the islsm (softmac prism54) driver, which is:
10 * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
12 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
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.
19 #include <linux/init.h>
20 #include <linux/firmware.h>
21 #include <linux/etherdevice.h>
23 #include <net/mac80211.h>
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");
36 static int p54_sta_add_remove(struct ieee80211_hw *hw,
37 struct ieee80211_vif *vif,
38 struct ieee80211_sta *sta)
40 struct p54_common *priv = hw->priv;
43 * Notify the firmware that we don't want or we don't
44 * need to buffer frames for this station anymore.
47 p54_sta_unlock(priv, sta->addr);
52 static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
53 enum sta_notify_cmd notify_cmd,
54 struct ieee80211_sta *sta)
56 struct p54_common *priv = dev->priv;
59 case STA_NOTIFY_AWAKE:
60 /* update the firmware's filter table */
61 p54_sta_unlock(priv, sta->addr);
68 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
71 struct p54_common *priv = dev->priv;
73 return p54_update_beacon_tim(priv, sta->aid, set);
76 u8 *p54_find_ie(struct sk_buff *skb, u8 ie)
78 struct ieee80211_mgmt *mgmt = (void *)skb->data;
81 if (skb->len <= sizeof(mgmt))
84 pos = (u8 *)mgmt->u.beacon.variable;
85 end = skb->data + skb->len;
87 if (pos + 2 + pos[1] > end)
98 static int p54_beacon_format_ie_tim(struct sk_buff *skb)
101 * the good excuse for this mess is ... the firmware.
102 * The dummy TIM MUST be at the end of the beacon frame,
103 * because it'll be overwritten!
110 tim = p54_find_ie(skb, WLAN_EID_TIM);
115 dtim_period = tim[3];
116 next = tim + 2 + dtim_len;
121 memmove(tim, next, skb_tail_pointer(skb) - next);
122 tim = skb_tail_pointer(skb) - (dtim_len + 2);
124 /* add the dummy at the end */
125 tim[0] = WLAN_EID_TIM;
128 tim[3] = dtim_period;
132 skb_trim(skb, skb->len - (dtim_len - 3));
137 static int p54_beacon_update(struct p54_common *priv,
138 struct ieee80211_vif *vif)
140 struct sk_buff *beacon;
143 beacon = ieee80211_beacon_get(priv->hw, vif);
146 ret = p54_beacon_format_ie_tim(beacon);
151 * During operation, the firmware takes care of beaconing.
152 * The driver only needs to upload a new beacon template, once
153 * the template was changed by the stack or userspace.
155 * LMAC API 3.2.2 also specifies that the driver does not need
156 * to cancel the old beacon template by hand, instead the firmware
157 * will release the previous one through the feedback mechanism.
159 WARN_ON(p54_tx_80211(priv->hw, beacon));
160 priv->tsf_high32 = 0;
166 static int p54_start(struct ieee80211_hw *dev)
168 struct p54_common *priv = dev->priv;
171 mutex_lock(&priv->conf_mutex);
172 err = priv->open(dev);
175 P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
176 P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
177 P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
178 P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
179 err = p54_set_edcf(priv);
183 memset(priv->bssid, ~0, ETH_ALEN);
184 priv->mode = NL80211_IFTYPE_MONITOR;
185 err = p54_setup_mac(priv);
187 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
191 ieee80211_queue_delayed_work(dev, &priv->work, 0);
193 priv->softled_state = 0;
194 err = p54_set_leds(priv);
197 mutex_unlock(&priv->conf_mutex);
201 static void p54_stop(struct ieee80211_hw *dev)
203 struct p54_common *priv = dev->priv;
206 mutex_lock(&priv->conf_mutex);
207 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
208 priv->softled_state = 0;
211 cancel_delayed_work_sync(&priv->work);
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;
221 priv->beacon_req_id = cpu_to_le32(0);
222 priv->tsf_high32 = priv->tsf_low32 = 0;
223 mutex_unlock(&priv->conf_mutex);
226 static int p54_add_interface(struct ieee80211_hw *dev,
227 struct ieee80211_vif *vif)
229 struct p54_common *priv = dev->priv;
231 mutex_lock(&priv->conf_mutex);
232 if (priv->mode != NL80211_IFTYPE_MONITOR) {
233 mutex_unlock(&priv->conf_mutex);
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;
247 mutex_unlock(&priv->conf_mutex);
251 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
253 mutex_unlock(&priv->conf_mutex);
257 static void p54_remove_interface(struct ieee80211_hw *dev,
258 struct ieee80211_vif *vif)
260 struct p54_common *priv = dev->priv;
262 mutex_lock(&priv->conf_mutex);
266 * LMAC API 3.2.2 states that any active beacon template must be
267 * canceled by the driver before attempting a mode transition.
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);
273 priv->mode = NL80211_IFTYPE_MONITOR;
274 memset(priv->mac_addr, 0, ETH_ALEN);
275 memset(priv->bssid, 0, ETH_ALEN);
277 mutex_unlock(&priv->conf_mutex);
280 static int p54_config(struct ieee80211_hw *dev, u32 changed)
283 struct p54_common *priv = dev->priv;
284 struct ieee80211_conf *conf = &dev->conf;
286 mutex_lock(&priv->conf_mutex);
287 if (changed & IEEE80211_CONF_CHANGE_POWER)
288 priv->output_power = conf->power_level << 2;
289 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
290 ret = p54_scan(priv, P54_SCAN_EXIT, 0);
294 if (changed & IEEE80211_CONF_CHANGE_PS) {
295 ret = p54_set_ps(priv);
299 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
300 ret = p54_setup_mac(priv);
306 mutex_unlock(&priv->conf_mutex);
310 static void p54_configure_filter(struct ieee80211_hw *dev,
311 unsigned int changed_flags,
312 unsigned int *total_flags,
315 struct p54_common *priv = dev->priv;
317 *total_flags &= FIF_PROMISC_IN_BSS |
320 priv->filter_flags = *total_flags;
322 if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS))
326 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
327 const struct ieee80211_tx_queue_params *params)
329 struct p54_common *priv = dev->priv;
332 mutex_lock(&priv->conf_mutex);
333 if (queue < dev->queues) {
334 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
335 params->cw_min, params->cw_max, params->txop);
336 ret = p54_set_edcf(priv);
339 mutex_unlock(&priv->conf_mutex);
343 static void p54_work(struct work_struct *work)
345 struct p54_common *priv = container_of(work, struct p54_common,
348 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
352 * TODO: walk through tx_queue and do the following tasks
353 * 1. initiate bursts.
354 * 2. cancel stuck frames / reset the device if necessary.
357 p54_fetch_statistics(priv);
360 static int p54_get_stats(struct ieee80211_hw *dev,
361 struct ieee80211_low_level_stats *stats)
363 struct p54_common *priv = dev->priv;
365 memcpy(stats, &priv->stats, sizeof(*stats));
369 static void p54_bss_info_changed(struct ieee80211_hw *dev,
370 struct ieee80211_vif *vif,
371 struct ieee80211_bss_conf *info,
374 struct p54_common *priv = dev->priv;
376 mutex_lock(&priv->conf_mutex);
377 if (changed & BSS_CHANGED_BSSID) {
378 memcpy(priv->bssid, info->bssid, ETH_ALEN);
382 if (changed & BSS_CHANGED_BEACON) {
383 p54_scan(priv, P54_SCAN_EXIT, 0);
385 p54_beacon_update(priv, vif);
389 if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {
390 priv->use_short_slot = info->use_short_slot;
393 if (changed & BSS_CHANGED_BASIC_RATES) {
394 if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
395 priv->basic_rate_mask = (info->basic_rates << 4);
397 priv->basic_rate_mask = info->basic_rates;
399 if (priv->fw_var >= 0x500)
400 p54_scan(priv, P54_SCAN_EXIT, 0);
402 if (changed & BSS_CHANGED_ASSOC) {
404 priv->aid = info->aid;
405 priv->wakeup_timer = info->beacon_int *
406 info->dtim_period * 5;
409 priv->wakeup_timer = 500;
414 mutex_unlock(&priv->conf_mutex);
417 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
418 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
419 struct ieee80211_key_conf *key)
421 struct p54_common *priv = dev->priv;
426 if (modparam_nohwcrypt)
429 mutex_lock(&priv->conf_mutex);
430 if (cmd == SET_KEY) {
433 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
434 BR_DESC_PRIV_CAP_TKIP))) {
438 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
439 algo = P54_CRYPTO_TKIPMICHAEL;
442 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {
446 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
447 algo = P54_CRYPTO_WEP;
450 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {
454 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
455 algo = P54_CRYPTO_AESCCMP;
461 slot = bitmap_find_free_region(priv->used_rxkeys,
462 priv->rx_keycache_size, 0);
466 * The device supports the choosen algorithm, but the
467 * firmware does not provide enough key slots to store
469 * But encryption offload for outgoing frames is always
470 * possible, so we just pretend that the upload was
471 * successful and do the decryption in software.
474 /* mark the key as invalid. */
475 key->hw_key_idx = 0xff;
479 slot = key->hw_key_idx;
482 /* This key was not uploaded into the rx key cache. */
487 bitmap_release_region(priv->used_rxkeys, slot, 0);
494 ret = p54_upload_key(priv, algo, slot, key->keyidx,
495 key->keylen, addr, key->key);
497 bitmap_release_region(priv->used_rxkeys, slot, 0);
502 key->hw_key_idx = slot;
505 mutex_unlock(&priv->conf_mutex);
509 static const struct ieee80211_ops p54_ops = {
513 .add_interface = p54_add_interface,
514 .remove_interface = p54_remove_interface,
515 .set_tim = p54_set_tim,
516 .sta_notify = p54_sta_notify,
517 .sta_add = p54_sta_add_remove,
518 .sta_remove = p54_sta_add_remove,
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,
527 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
529 struct ieee80211_hw *dev;
530 struct p54_common *priv;
532 dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
538 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
539 priv->basic_rate_mask = 0x15f;
540 spin_lock_init(&priv->tx_stats_lock);
541 skb_queue_head_init(&priv->tx_queue);
542 skb_queue_head_init(&priv->tx_pending);
543 dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
544 IEEE80211_HW_SIGNAL_DBM |
545 IEEE80211_HW_SUPPORTS_PS |
546 IEEE80211_HW_PS_NULLFUNC_STACK |
547 IEEE80211_HW_BEACON_FILTER |
548 IEEE80211_HW_NOISE_DBM;
550 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
551 BIT(NL80211_IFTYPE_ADHOC) |
552 BIT(NL80211_IFTYPE_AP) |
553 BIT(NL80211_IFTYPE_MESH_POINT);
555 dev->channel_change_time = 1000; /* TODO: find actual value */
556 priv->beacon_req_id = cpu_to_le32(0);
557 priv->tx_stats[P54_QUEUE_BEACON].limit = 1;
558 priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1;
559 priv->tx_stats[P54_QUEUE_MGMT].limit = 3;
560 priv->tx_stats[P54_QUEUE_CAB].limit = 3;
561 priv->tx_stats[P54_QUEUE_DATA].limit = 5;
565 * We support at most 8 tries no matter which rate they're at,
566 * we cannot support max_rates * max_rate_tries as we set it
567 * here, but setting it correctly to 4/2 or so would limit us
568 * artificially if the RC algorithm wants just two rates, so
569 * let's say 4/7, we'll redistribute it at TX time, see the
573 dev->max_rate_tries = 7;
574 dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
575 sizeof(struct p54_tx_data);
578 * For now, disable PS by default because it affects
579 * link stability significantly.
581 dev->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
583 mutex_init(&priv->conf_mutex);
584 mutex_init(&priv->eeprom_mutex);
585 init_completion(&priv->eeprom_comp);
586 init_completion(&priv->beacon_comp);
587 INIT_DELAYED_WORK(&priv->work, p54_work);
591 EXPORT_SYMBOL_GPL(p54_init_common);
593 int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
595 struct p54_common *priv = dev->priv;
598 err = ieee80211_register_hw(dev);
600 dev_err(pdev, "Cannot register device (%d).\n", err);
604 #ifdef CONFIG_P54_LEDS
605 err = p54_init_leds(priv);
608 #endif /* CONFIG_P54_LEDS */
610 dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
613 EXPORT_SYMBOL_GPL(p54_register_common);
615 void p54_free_common(struct ieee80211_hw *dev)
617 struct p54_common *priv = dev->priv;
620 for (i = 0; i < IEEE80211_NUM_BANDS; i++)
621 kfree(priv->band_table[i]);
623 kfree(priv->iq_autocal);
624 kfree(priv->output_limit);
625 kfree(priv->curve_data);
626 kfree(priv->used_rxkeys);
627 priv->iq_autocal = NULL;
628 priv->output_limit = NULL;
629 priv->curve_data = NULL;
630 priv->used_rxkeys = NULL;
631 ieee80211_free_hw(dev);
633 EXPORT_SYMBOL_GPL(p54_free_common);
635 void p54_unregister_common(struct ieee80211_hw *dev)
637 struct p54_common *priv = dev->priv;
639 #ifdef CONFIG_P54_LEDS
640 p54_unregister_leds(priv);
641 #endif /* CONFIG_P54_LEDS */
643 ieee80211_unregister_hw(dev);
644 mutex_destroy(&priv->conf_mutex);
645 mutex_destroy(&priv->eeprom_mutex);
647 EXPORT_SYMBOL_GPL(p54_unregister_common);