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 void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
37 enum sta_notify_cmd notify_cmd,
38 struct ieee80211_sta *sta)
40 struct p54_common *priv = dev->priv;
43 case STA_NOTIFY_REMOVE:
45 * Notify the firmware that we don't want or we don't
46 * need to buffer frames for this station anymore.
49 p54_sta_unlock(priv, sta->addr);
51 case STA_NOTIFY_AWAKE:
52 /* update the firmware's filter table */
53 p54_sta_unlock(priv, sta->addr);
60 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
63 struct p54_common *priv = dev->priv;
65 return p54_update_beacon_tim(priv, sta->aid, set);
68 u8 *p54_find_ie(struct sk_buff *skb, u8 ie)
70 struct ieee80211_mgmt *mgmt = (void *)skb->data;
73 if (skb->len <= sizeof(mgmt))
76 pos = (u8 *)mgmt->u.beacon.variable;
77 end = skb->data + skb->len;
79 if (pos + 2 + pos[1] > end)
90 static int p54_beacon_format_ie_tim(struct sk_buff *skb)
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!
102 tim = p54_find_ie(skb, WLAN_EID_TIM);
107 dtim_period = tim[3];
108 next = tim + 2 + dtim_len;
113 memmove(tim, next, skb_tail_pointer(skb) - next);
114 tim = skb_tail_pointer(skb) - (dtim_len + 2);
116 /* add the dummy at the end */
117 tim[0] = WLAN_EID_TIM;
120 tim[3] = dtim_period;
124 skb_trim(skb, skb->len - (dtim_len - 3));
129 static int p54_beacon_update(struct p54_common *priv,
130 struct ieee80211_vif *vif)
132 struct sk_buff *beacon;
133 __le32 old_beacon_req_id;
136 beacon = ieee80211_beacon_get(priv->hw, vif);
139 ret = p54_beacon_format_ie_tim(beacon);
143 old_beacon_req_id = priv->beacon_req_id;
144 priv->beacon_req_id = GET_REQ_ID(beacon);
146 ret = p54_tx_80211(priv->hw, beacon);
148 priv->beacon_req_id = old_beacon_req_id;
152 priv->tsf_high32 = 0;
158 static int p54_start(struct ieee80211_hw *dev)
160 struct p54_common *priv = dev->priv;
163 mutex_lock(&priv->conf_mutex);
164 err = priv->open(dev);
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);
175 memset(priv->bssid, ~0, ETH_ALEN);
176 priv->mode = NL80211_IFTYPE_MONITOR;
177 err = p54_setup_mac(priv);
179 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
183 queue_delayed_work(dev->workqueue, &priv->work, 0);
185 priv->softled_state = 0;
186 err = p54_set_leds(priv);
189 mutex_unlock(&priv->conf_mutex);
193 static void p54_stop(struct ieee80211_hw *dev)
195 struct p54_common *priv = dev->priv;
198 mutex_lock(&priv->conf_mutex);
199 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
200 priv->softled_state = 0;
203 cancel_delayed_work_sync(&priv->work);
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;
213 priv->beacon_req_id = cpu_to_le32(0);
214 priv->tsf_high32 = priv->tsf_low32 = 0;
215 mutex_unlock(&priv->conf_mutex);
218 static int p54_add_interface(struct ieee80211_hw *dev,
219 struct ieee80211_if_init_conf *conf)
221 struct p54_common *priv = dev->priv;
223 mutex_lock(&priv->conf_mutex);
224 if (priv->mode != NL80211_IFTYPE_MONITOR) {
225 mutex_unlock(&priv->conf_mutex);
229 priv->vif = conf->vif;
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;
239 mutex_unlock(&priv->conf_mutex);
243 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
245 mutex_unlock(&priv->conf_mutex);
249 static void p54_remove_interface(struct ieee80211_hw *dev,
250 struct ieee80211_if_init_conf *conf)
252 struct p54_common *priv = dev->priv;
254 mutex_lock(&priv->conf_mutex);
256 if (priv->beacon_req_id) {
257 p54_tx_cancel(priv, priv->beacon_req_id);
258 priv->beacon_req_id = cpu_to_le32(0);
260 priv->mode = NL80211_IFTYPE_MONITOR;
261 memset(priv->mac_addr, 0, ETH_ALEN);
262 memset(priv->bssid, 0, ETH_ALEN);
264 mutex_unlock(&priv->conf_mutex);
267 static int p54_config(struct ieee80211_hw *dev, u32 changed)
270 struct p54_common *priv = dev->priv;
271 struct ieee80211_conf *conf = &dev->conf;
273 mutex_lock(&priv->conf_mutex);
274 if (changed & IEEE80211_CONF_CHANGE_POWER)
275 priv->output_power = conf->power_level << 2;
276 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
277 ret = p54_scan(priv, P54_SCAN_EXIT, 0);
281 if (changed & IEEE80211_CONF_CHANGE_PS) {
282 ret = p54_set_ps(priv);
288 mutex_unlock(&priv->conf_mutex);
292 static void p54_configure_filter(struct ieee80211_hw *dev,
293 unsigned int changed_flags,
294 unsigned int *total_flags,
295 int mc_count, struct dev_mc_list *mclist)
297 struct p54_common *priv = dev->priv;
299 *total_flags &= FIF_PROMISC_IN_BSS |
302 priv->filter_flags = *total_flags;
304 if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS))
308 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
309 const struct ieee80211_tx_queue_params *params)
311 struct p54_common *priv = dev->priv;
314 mutex_lock(&priv->conf_mutex);
315 if ((params) && !(queue > 4)) {
316 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
317 params->cw_min, params->cw_max, params->txop);
318 ret = p54_set_edcf(priv);
321 mutex_unlock(&priv->conf_mutex);
325 static void p54_work(struct work_struct *work)
327 struct p54_common *priv = container_of(work, struct p54_common,
330 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
334 * TODO: walk through tx_queue and do the following tasks
335 * 1. initiate bursts.
336 * 2. cancel stuck frames / reset the device if necessary.
339 p54_fetch_statistics(priv);
342 static int p54_get_stats(struct ieee80211_hw *dev,
343 struct ieee80211_low_level_stats *stats)
345 struct p54_common *priv = dev->priv;
347 memcpy(stats, &priv->stats, sizeof(*stats));
351 static int p54_get_tx_stats(struct ieee80211_hw *dev,
352 struct ieee80211_tx_queue_stats *stats)
354 struct p54_common *priv = dev->priv;
356 memcpy(stats, &priv->tx_stats[P54_QUEUE_DATA],
357 sizeof(stats[0]) * dev->queues);
361 static void p54_bss_info_changed(struct ieee80211_hw *dev,
362 struct ieee80211_vif *vif,
363 struct ieee80211_bss_conf *info,
366 struct p54_common *priv = dev->priv;
368 mutex_lock(&priv->conf_mutex);
369 if (changed & BSS_CHANGED_BSSID) {
370 memcpy(priv->bssid, info->bssid, ETH_ALEN);
374 if (changed & BSS_CHANGED_BEACON) {
375 p54_scan(priv, P54_SCAN_EXIT, 0);
377 p54_beacon_update(priv, vif);
381 if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {
382 priv->use_short_slot = info->use_short_slot;
385 if (changed & BSS_CHANGED_BASIC_RATES) {
386 if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
387 priv->basic_rate_mask = (info->basic_rates << 4);
389 priv->basic_rate_mask = info->basic_rates;
391 if (priv->fw_var >= 0x500)
392 p54_scan(priv, P54_SCAN_EXIT, 0);
394 if (changed & BSS_CHANGED_ASSOC) {
396 priv->aid = info->aid;
397 priv->wakeup_timer = info->beacon_int *
398 info->dtim_period * 5;
401 priv->wakeup_timer = 500;
406 mutex_unlock(&priv->conf_mutex);
409 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
410 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
411 struct ieee80211_key_conf *key)
413 struct p54_common *priv = dev->priv;
418 if (modparam_nohwcrypt)
421 mutex_lock(&priv->conf_mutex);
422 if (cmd == SET_KEY) {
425 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
426 BR_DESC_PRIV_CAP_TKIP))) {
430 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
431 algo = P54_CRYPTO_TKIPMICHAEL;
434 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {
438 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
439 algo = P54_CRYPTO_WEP;
442 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {
446 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
447 algo = P54_CRYPTO_AESCCMP;
453 slot = bitmap_find_free_region(priv->used_rxkeys,
454 priv->rx_keycache_size, 0);
458 * The device supports the choosen algorithm, but the
459 * firmware does not provide enough key slots to store
461 * But encryption offload for outgoing frames is always
462 * possible, so we just pretend that the upload was
463 * successful and do the decryption in software.
466 /* mark the key as invalid. */
467 key->hw_key_idx = 0xff;
471 slot = key->hw_key_idx;
474 /* This key was not uploaded into the rx key cache. */
479 bitmap_release_region(priv->used_rxkeys, slot, 0);
486 ret = p54_upload_key(priv, algo, slot, key->keyidx,
487 key->keylen, addr, key->key);
489 bitmap_release_region(priv->used_rxkeys, slot, 0);
494 key->hw_key_idx = slot;
497 mutex_unlock(&priv->conf_mutex);
501 static const struct ieee80211_ops p54_ops = {
505 .add_interface = p54_add_interface,
506 .remove_interface = p54_remove_interface,
507 .set_tim = p54_set_tim,
508 .sta_notify = p54_sta_notify,
509 .set_key = p54_set_key,
510 .config = p54_config,
511 .bss_info_changed = p54_bss_info_changed,
512 .configure_filter = p54_configure_filter,
513 .conf_tx = p54_conf_tx,
514 .get_stats = p54_get_stats,
515 .get_tx_stats = p54_get_tx_stats
518 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
520 struct ieee80211_hw *dev;
521 struct p54_common *priv;
523 dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
529 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
530 priv->basic_rate_mask = 0x15f;
531 spin_lock_init(&priv->tx_stats_lock);
532 skb_queue_head_init(&priv->tx_queue);
533 skb_queue_head_init(&priv->tx_pending);
534 dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
535 IEEE80211_HW_SIGNAL_DBM |
536 IEEE80211_HW_SUPPORTS_PS |
537 IEEE80211_HW_PS_NULLFUNC_STACK |
538 IEEE80211_HW_BEACON_FILTER |
539 IEEE80211_HW_NOISE_DBM;
541 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
542 BIT(NL80211_IFTYPE_ADHOC) |
543 BIT(NL80211_IFTYPE_AP) |
544 BIT(NL80211_IFTYPE_MESH_POINT);
546 dev->channel_change_time = 1000; /* TODO: find actual value */
547 priv->tx_stats[P54_QUEUE_BEACON].limit = 1;
548 priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1;
549 priv->tx_stats[P54_QUEUE_MGMT].limit = 3;
550 priv->tx_stats[P54_QUEUE_CAB].limit = 3;
551 priv->tx_stats[P54_QUEUE_DATA].limit = 5;
555 * We support at most 8 tries no matter which rate they're at,
556 * we cannot support max_rates * max_rate_tries as we set it
557 * here, but setting it correctly to 4/2 or so would limit us
558 * artificially if the RC algorithm wants just two rates, so
559 * let's say 4/7, we'll redistribute it at TX time, see the
563 dev->max_rate_tries = 7;
564 dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
565 sizeof(struct p54_tx_data);
567 mutex_init(&priv->conf_mutex);
568 mutex_init(&priv->eeprom_mutex);
569 init_completion(&priv->eeprom_comp);
570 INIT_DELAYED_WORK(&priv->work, p54_work);
574 EXPORT_SYMBOL_GPL(p54_init_common);
576 int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
578 struct p54_common *priv = dev->priv;
581 err = ieee80211_register_hw(dev);
583 dev_err(pdev, "Cannot register device (%d).\n", err);
587 #ifdef CONFIG_P54_LEDS
588 err = p54_init_leds(priv);
591 #endif /* CONFIG_P54_LEDS */
593 dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
596 EXPORT_SYMBOL_GPL(p54_register_common);
598 void p54_free_common(struct ieee80211_hw *dev)
600 struct p54_common *priv = dev->priv;
603 for (i = 0; i < IEEE80211_NUM_BANDS; i++)
604 kfree(priv->band_table[i]);
606 kfree(priv->iq_autocal);
607 kfree(priv->output_limit);
608 kfree(priv->curve_data);
609 kfree(priv->used_rxkeys);
610 priv->iq_autocal = NULL;
611 priv->output_limit = NULL;
612 priv->curve_data = NULL;
613 priv->used_rxkeys = NULL;
614 ieee80211_free_hw(dev);
616 EXPORT_SYMBOL_GPL(p54_free_common);
618 void p54_unregister_common(struct ieee80211_hw *dev)
620 struct p54_common *priv = dev->priv;
622 #ifdef CONFIG_P54_LEDS
623 p54_unregister_leds(priv);
624 #endif /* CONFIG_P54_LEDS */
626 ieee80211_unregister_hw(dev);
627 mutex_destroy(&priv->conf_mutex);
628 mutex_destroy(&priv->eeprom_mutex);
630 EXPORT_SYMBOL_GPL(p54_unregister_common);