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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * mac80211 glue code for mac80211 Prism54 drivers4 *5 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>6 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>8 *9 * Based on:10 * - the islsm (softmac prism54) driver, which is:11 * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.12 * - stlc45xx driver13 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).14 */15 16#include <linux/slab.h>17#include <linux/firmware.h>18#include <linux/etherdevice.h>19#include <linux/module.h>20 21#include <net/mac80211.h>22 23#include "p54.h"24#include "lmac.h"25 26static bool modparam_nohwcrypt;27module_param_named(nohwcrypt, modparam_nohwcrypt, bool, 0444);28MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");29MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");30MODULE_DESCRIPTION("Softmac Prism54 common code");31MODULE_LICENSE("GPL");32MODULE_ALIAS("prism54common");33 34static int p54_sta_add_remove(struct ieee80211_hw *hw,35 struct ieee80211_vif *vif,36 struct ieee80211_sta *sta)37{38 struct p54_common *priv = hw->priv;39 40 /*41 * Notify the firmware that we don't want or we don't42 * need to buffer frames for this station anymore.43 */44 45 p54_sta_unlock(priv, sta->addr);46 47 return 0;48}49 50static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,51 enum sta_notify_cmd notify_cmd,52 struct ieee80211_sta *sta)53{54 struct p54_common *priv = dev->priv;55 56 switch (notify_cmd) {57 case STA_NOTIFY_AWAKE:58 /* update the firmware's filter table */59 p54_sta_unlock(priv, sta->addr);60 break;61 default:62 break;63 }64}65 66static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,67 bool set)68{69 struct p54_common *priv = dev->priv;70 71 return p54_update_beacon_tim(priv, sta->aid, set);72}73 74u8 *p54_find_ie(struct sk_buff *skb, u8 ie)75{76 struct ieee80211_mgmt *mgmt = (void *)skb->data;77 u8 *pos, *end;78 79 if (skb->len <= sizeof(mgmt))80 return NULL;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 NULL;87 88 if (pos[0] == ie)89 return pos;90 91 pos += 2 + pos[1];92 }93 return NULL;94}95 96static int p54_beacon_format_ie_tim(struct sk_buff *skb)97{98 /*99 * the good excuse for this mess is ... the firmware.100 * The dummy TIM MUST be at the end of the beacon frame,101 * because it'll be overwritten!102 */103 u8 *tim;104 u8 dtim_len;105 u8 dtim_period;106 u8 *next;107 108 tim = p54_find_ie(skb, WLAN_EID_TIM);109 if (!tim)110 return 0;111 112 dtim_len = tim[1];113 dtim_period = tim[3];114 next = tim + 2 + dtim_len;115 116 if (dtim_len < 3)117 return -EINVAL;118 119 memmove(tim, next, skb_tail_pointer(skb) - next);120 tim = skb_tail_pointer(skb) - (dtim_len + 2);121 122 /* add the dummy at the end */123 tim[0] = WLAN_EID_TIM;124 tim[1] = 3;125 tim[2] = 0;126 tim[3] = dtim_period;127 tim[4] = 0;128 129 if (dtim_len > 3)130 skb_trim(skb, skb->len - (dtim_len - 3));131 132 return 0;133}134 135static int p54_beacon_update(struct p54_common *priv,136 struct ieee80211_vif *vif)137{138 struct ieee80211_tx_control control = { };139 struct sk_buff *beacon;140 int ret;141 142 beacon = ieee80211_beacon_get(priv->hw, vif, 0);143 if (!beacon)144 return -ENOMEM;145 ret = p54_beacon_format_ie_tim(beacon);146 if (ret)147 return ret;148 149 /*150 * During operation, the firmware takes care of beaconing.151 * The driver only needs to upload a new beacon template, once152 * the template was changed by the stack or userspace.153 *154 * LMAC API 3.2.2 also specifies that the driver does not need155 * to cancel the old beacon template by hand, instead the firmware156 * will release the previous one through the feedback mechanism.157 */158 p54_tx_80211(priv->hw, &control, beacon);159 priv->tsf_high32 = 0;160 priv->tsf_low32 = 0;161 162 return 0;163}164 165static int p54_start(struct ieee80211_hw *dev)166{167 struct p54_common *priv = dev->priv;168 int err;169 170 mutex_lock(&priv->conf_mutex);171 err = priv->open(dev);172 if (err)173 goto out;174 P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);175 P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);176 P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);177 P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);178 err = p54_set_edcf(priv);179 if (err)180 goto out;181 182 eth_broadcast_addr(priv->bssid);183 priv->mode = NL80211_IFTYPE_MONITOR;184 err = p54_setup_mac(priv);185 if (err) {186 priv->mode = NL80211_IFTYPE_UNSPECIFIED;187 goto out;188 }189 190 ieee80211_queue_delayed_work(dev, &priv->work, 0);191 192 priv->softled_state = 0;193 err = p54_set_leds(priv);194 195out:196 mutex_unlock(&priv->conf_mutex);197 return err;198}199 200static void p54_stop(struct ieee80211_hw *dev, bool suspend)201{202 struct p54_common *priv = dev->priv;203 int i;204 205 priv->mode = NL80211_IFTYPE_UNSPECIFIED;206 priv->softled_state = 0;207 cancel_delayed_work_sync(&priv->work);208 mutex_lock(&priv->conf_mutex);209 p54_set_leds(priv);210 priv->stop(dev);211 skb_queue_purge(&priv->tx_pending);212 skb_queue_purge(&priv->tx_queue);213 for (i = 0; i < P54_QUEUE_NUM; i++) {214 priv->tx_stats[i].count = 0;215 priv->tx_stats[i].len = 0;216 }217 218 priv->beacon_req_id = cpu_to_le32(0);219 priv->tsf_high32 = priv->tsf_low32 = 0;220 mutex_unlock(&priv->conf_mutex);221}222 223static int p54_add_interface(struct ieee80211_hw *dev,224 struct ieee80211_vif *vif)225{226 struct p54_common *priv = dev->priv;227 int err;228 229 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;230 231 mutex_lock(&priv->conf_mutex);232 if (priv->mode != NL80211_IFTYPE_MONITOR) {233 mutex_unlock(&priv->conf_mutex);234 return -EOPNOTSUPP;235 }236 237 priv->vif = vif;238 239 switch (vif->type) {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;245 break;246 default:247 mutex_unlock(&priv->conf_mutex);248 return -EOPNOTSUPP;249 }250 251 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);252 err = p54_setup_mac(priv);253 mutex_unlock(&priv->conf_mutex);254 return err;255}256 257static void p54_remove_interface(struct ieee80211_hw *dev,258 struct ieee80211_vif *vif)259{260 struct p54_common *priv = dev->priv;261 262 mutex_lock(&priv->conf_mutex);263 priv->vif = NULL;264 265 /*266 * LMAC API 3.2.2 states that any active beacon template must be267 * canceled by the driver before attempting a mode transition.268 */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);272 }273 priv->mode = NL80211_IFTYPE_MONITOR;274 eth_zero_addr(priv->mac_addr);275 eth_zero_addr(priv->bssid);276 p54_setup_mac(priv);277 mutex_unlock(&priv->conf_mutex);278}279 280static int p54_wait_for_stats(struct ieee80211_hw *dev)281{282 struct p54_common *priv = dev->priv;283 int ret;284 285 priv->update_stats = true;286 ret = p54_fetch_statistics(priv);287 if (ret)288 return ret;289 290 ret = wait_for_completion_interruptible_timeout(&priv->stat_comp, HZ);291 if (ret == 0)292 return -ETIMEDOUT;293 294 return 0;295}296 297static void p54_reset_stats(struct p54_common *priv)298{299 struct ieee80211_channel *chan = priv->curchan;300 301 if (chan) {302 struct survey_info *info = &priv->survey[chan->hw_value];303 304 /* only reset channel statistics, don't touch .filled, etc. */305 info->time = 0;306 info->time_busy = 0;307 info->time_tx = 0;308 }309 310 priv->update_stats = true;311 priv->survey_raw.active = 0;312 priv->survey_raw.cca = 0;313 priv->survey_raw.tx = 0;314}315 316static int p54_config(struct ieee80211_hw *dev, u32 changed)317{318 int ret = 0;319 struct p54_common *priv = dev->priv;320 struct ieee80211_conf *conf = &dev->conf;321 322 mutex_lock(&priv->conf_mutex);323 if (changed & IEEE80211_CONF_CHANGE_POWER)324 priv->output_power = conf->power_level << 2;325 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {326 struct ieee80211_channel *oldchan;327 WARN_ON(p54_wait_for_stats(dev));328 oldchan = priv->curchan;329 priv->curchan = NULL;330 ret = p54_scan(priv, P54_SCAN_EXIT, 0);331 if (ret) {332 priv->curchan = oldchan;333 goto out;334 }335 /*336 * TODO: Use the LM_SCAN_TRAP to determine the current337 * operating channel.338 */339 priv->curchan = priv->hw->conf.chandef.chan;340 p54_reset_stats(priv);341 WARN_ON(p54_fetch_statistics(priv));342 }343 if (changed & IEEE80211_CONF_CHANGE_PS) {344 WARN_ON(p54_wait_for_stats(dev));345 ret = p54_set_ps(priv);346 if (ret)347 goto out;348 WARN_ON(p54_wait_for_stats(dev));349 }350 if (changed & IEEE80211_CONF_CHANGE_IDLE) {351 WARN_ON(p54_wait_for_stats(dev));352 ret = p54_setup_mac(priv);353 if (ret)354 goto out;355 WARN_ON(p54_wait_for_stats(dev));356 }357 358out:359 mutex_unlock(&priv->conf_mutex);360 return ret;361}362 363static u64 p54_prepare_multicast(struct ieee80211_hw *dev,364 struct netdev_hw_addr_list *mc_list)365{366 struct p54_common *priv = dev->priv;367 struct netdev_hw_addr *ha;368 int i;369 370 BUILD_BUG_ON(ARRAY_SIZE(priv->mc_maclist) !=371 ARRAY_SIZE(((struct p54_group_address_table *)NULL)->mac_list));372 /*373 * The first entry is reserved for the global broadcast MAC.374 * Otherwise the firmware will drop it and ARP will no longer work.375 */376 i = 1;377 priv->mc_maclist_num = netdev_hw_addr_list_count(mc_list) + i;378 netdev_hw_addr_list_for_each(ha, mc_list) {379 memcpy(&priv->mc_maclist[i], ha->addr, ETH_ALEN);380 i++;381 if (i >= ARRAY_SIZE(priv->mc_maclist))382 break;383 }384 385 return 1; /* update */386}387 388static void p54_configure_filter(struct ieee80211_hw *dev,389 unsigned int changed_flags,390 unsigned int *total_flags,391 u64 multicast)392{393 struct p54_common *priv = dev->priv;394 395 *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS;396 397 priv->filter_flags = *total_flags;398 399 if (changed_flags & FIF_OTHER_BSS)400 p54_setup_mac(priv);401 402 if (changed_flags & FIF_ALLMULTI || multicast)403 p54_set_groupfilter(priv);404}405 406static int p54_conf_tx(struct ieee80211_hw *dev,407 struct ieee80211_vif *vif,408 unsigned int link_id, u16 queue,409 const struct ieee80211_tx_queue_params *params)410{411 struct p54_common *priv = dev->priv;412 int ret;413 414 mutex_lock(&priv->conf_mutex);415 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,416 params->cw_min, params->cw_max, params->txop);417 ret = p54_set_edcf(priv);418 mutex_unlock(&priv->conf_mutex);419 return ret;420}421 422static void p54_work(struct work_struct *work)423{424 struct p54_common *priv = container_of(work, struct p54_common,425 work.work);426 427 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))428 return ;429 430 /*431 * TODO: walk through tx_queue and do the following tasks432 * 1. initiate bursts.433 * 2. cancel stuck frames / reset the device if necessary.434 */435 436 mutex_lock(&priv->conf_mutex);437 WARN_ON_ONCE(p54_fetch_statistics(priv));438 mutex_unlock(&priv->conf_mutex);439}440 441static int p54_get_stats(struct ieee80211_hw *dev,442 struct ieee80211_low_level_stats *stats)443{444 struct p54_common *priv = dev->priv;445 446 memcpy(stats, &priv->stats, sizeof(*stats));447 return 0;448}449 450static void p54_bss_info_changed(struct ieee80211_hw *dev,451 struct ieee80211_vif *vif,452 struct ieee80211_bss_conf *info,453 u64 changed)454{455 struct p54_common *priv = dev->priv;456 457 mutex_lock(&priv->conf_mutex);458 if (changed & BSS_CHANGED_BSSID) {459 memcpy(priv->bssid, info->bssid, ETH_ALEN);460 p54_setup_mac(priv);461 }462 463 if (changed & BSS_CHANGED_BEACON) {464 p54_scan(priv, P54_SCAN_EXIT, 0);465 p54_setup_mac(priv);466 p54_beacon_update(priv, vif);467 p54_set_edcf(priv);468 }469 470 if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {471 priv->use_short_slot = info->use_short_slot;472 p54_set_edcf(priv);473 }474 if (changed & BSS_CHANGED_BASIC_RATES) {475 if (dev->conf.chandef.chan->band == NL80211_BAND_5GHZ)476 priv->basic_rate_mask = (info->basic_rates << 4);477 else478 priv->basic_rate_mask = info->basic_rates;479 p54_setup_mac(priv);480 if (priv->fw_var >= 0x500)481 p54_scan(priv, P54_SCAN_EXIT, 0);482 }483 if (changed & BSS_CHANGED_ASSOC) {484 if (vif->cfg.assoc) {485 priv->aid = vif->cfg.aid;486 priv->wakeup_timer = info->beacon_int *487 info->dtim_period * 5;488 p54_setup_mac(priv);489 } else {490 priv->wakeup_timer = 500;491 priv->aid = 0;492 }493 }494 495 mutex_unlock(&priv->conf_mutex);496}497 498static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,499 struct ieee80211_vif *vif, struct ieee80211_sta *sta,500 struct ieee80211_key_conf *key)501{502 struct p54_common *priv = dev->priv;503 int slot, ret = 0;504 u8 algo = 0;505 u8 *addr = NULL;506 507 if (modparam_nohwcrypt)508 return -EOPNOTSUPP;509 510 if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) {511 /*512 * Unfortunately most/all firmwares are trying to decrypt513 * incoming management frames if a suitable key can be found.514 * However, in doing so the data in these frames gets515 * corrupted. So, we can't have firmware supported crypto516 * offload in this case.517 */518 return -EOPNOTSUPP;519 }520 521 mutex_lock(&priv->conf_mutex);522 if (cmd == SET_KEY) {523 switch (key->cipher) {524 case WLAN_CIPHER_SUITE_TKIP:525 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |526 BR_DESC_PRIV_CAP_TKIP))) {527 ret = -EOPNOTSUPP;528 goto out_unlock;529 }530 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;531 algo = P54_CRYPTO_TKIPMICHAEL;532 break;533 case WLAN_CIPHER_SUITE_WEP40:534 case WLAN_CIPHER_SUITE_WEP104:535 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {536 ret = -EOPNOTSUPP;537 goto out_unlock;538 }539 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;540 algo = P54_CRYPTO_WEP;541 break;542 case WLAN_CIPHER_SUITE_CCMP:543 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {544 ret = -EOPNOTSUPP;545 goto out_unlock;546 }547 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;548 algo = P54_CRYPTO_AESCCMP;549 break;550 default:551 ret = -EOPNOTSUPP;552 goto out_unlock;553 }554 slot = bitmap_find_free_region(priv->used_rxkeys,555 priv->rx_keycache_size, 0);556 557 if (slot < 0) {558 /*559 * The device supports the chosen algorithm, but the560 * firmware does not provide enough key slots to store561 * all of them.562 * But encryption offload for outgoing frames is always563 * possible, so we just pretend that the upload was564 * successful and do the decryption in software.565 */566 567 /* mark the key as invalid. */568 key->hw_key_idx = 0xff;569 goto out_unlock;570 }571 572 key->flags |= IEEE80211_KEY_FLAG_RESERVE_TAILROOM;573 } else {574 slot = key->hw_key_idx;575 576 if (slot == 0xff) {577 /* This key was not uploaded into the rx key cache. */578 579 goto out_unlock;580 }581 582 bitmap_release_region(priv->used_rxkeys, slot, 0);583 algo = 0;584 }585 586 if (sta)587 addr = sta->addr;588 589 ret = p54_upload_key(priv, algo, slot, key->keyidx,590 key->keylen, addr, key->key);591 if (ret) {592 bitmap_release_region(priv->used_rxkeys, slot, 0);593 ret = -EOPNOTSUPP;594 goto out_unlock;595 }596 597 key->hw_key_idx = slot;598 599out_unlock:600 mutex_unlock(&priv->conf_mutex);601 return ret;602}603 604static int p54_get_survey(struct ieee80211_hw *dev, int idx,605 struct survey_info *survey)606{607 struct p54_common *priv = dev->priv;608 struct ieee80211_channel *chan;609 int err, tries;610 bool in_use = false;611 612 if (idx >= priv->chan_num)613 return -ENOENT;614 615#define MAX_TRIES 1616 for (tries = 0; tries < MAX_TRIES; tries++) {617 chan = priv->curchan;618 if (chan && chan->hw_value == idx) {619 mutex_lock(&priv->conf_mutex);620 err = p54_wait_for_stats(dev);621 mutex_unlock(&priv->conf_mutex);622 if (err)623 return err;624 625 in_use = true;626 }627 628 memcpy(survey, &priv->survey[idx], sizeof(*survey));629 630 if (in_use) {631 /* test if the reported statistics are valid. */632 if (survey->time != 0) {633 survey->filled |= SURVEY_INFO_IN_USE;634 } else {635 /*636 * hw/fw has not accumulated enough sample sets.637 * Wait for 100ms, this ought to be enough to638 * get at least one non-null set of channel639 * usage statistics.640 */641 msleep(100);642 continue;643 }644 }645 return 0;646 }647 return -ETIMEDOUT;648#undef MAX_TRIES649}650 651static unsigned int p54_flush_count(struct p54_common *priv)652{653 unsigned int total = 0, i;654 655 BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats));656 657 /*658 * Because the firmware has the sole control over any frames659 * in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they660 * don't really count as pending or active.661 */662 for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++)663 total += priv->tx_stats[i].len;664 return total;665}666 667static void p54_flush(struct ieee80211_hw *dev, struct ieee80211_vif *vif,668 u32 queues, bool drop)669{670 struct p54_common *priv = dev->priv;671 unsigned int total, i;672 673 /*674 * Currently, it wouldn't really matter if we wait for one second675 * or 15 minutes. But once someone gets around and completes the676 * TODOs [ancel stuck frames / reset device] in p54_work, it will677 * suddenly make sense to wait that long.678 */679 i = P54_STATISTICS_UPDATE * 2 / 20;680 681 /*682 * In this case no locking is required because as we speak the683 * queues have already been stopped and no new frames can sneak684 * up from behind.685 */686 while ((total = p54_flush_count(priv)) && i--) {687 /* waste time */688 msleep(20);689 }690 691 WARN(total, "tx flush timeout, unresponsive firmware");692}693 694static void p54_set_coverage_class(struct ieee80211_hw *dev,695 s16 coverage_class)696{697 struct p54_common *priv = dev->priv;698 699 mutex_lock(&priv->conf_mutex);700 /* support all coverage class values as in 802.11-2007 Table 7-27 */701 priv->coverage_class = clamp_t(u8, coverage_class, 0, 31);702 p54_set_edcf(priv);703 mutex_unlock(&priv->conf_mutex);704}705 706static const struct ieee80211_ops p54_ops = {707 .add_chanctx = ieee80211_emulate_add_chanctx,708 .remove_chanctx = ieee80211_emulate_remove_chanctx,709 .change_chanctx = ieee80211_emulate_change_chanctx,710 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,711 .tx = p54_tx_80211,712 .wake_tx_queue = ieee80211_handle_wake_tx_queue,713 .start = p54_start,714 .stop = p54_stop,715 .add_interface = p54_add_interface,716 .remove_interface = p54_remove_interface,717 .set_tim = p54_set_tim,718 .sta_notify = p54_sta_notify,719 .sta_add = p54_sta_add_remove,720 .sta_remove = p54_sta_add_remove,721 .set_key = p54_set_key,722 .config = p54_config,723 .flush = p54_flush,724 .bss_info_changed = p54_bss_info_changed,725 .prepare_multicast = p54_prepare_multicast,726 .configure_filter = p54_configure_filter,727 .conf_tx = p54_conf_tx,728 .get_stats = p54_get_stats,729 .get_survey = p54_get_survey,730 .set_coverage_class = p54_set_coverage_class,731};732 733struct ieee80211_hw *p54_init_common(size_t priv_data_len)734{735 struct ieee80211_hw *dev;736 struct p54_common *priv;737 738 dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);739 if (!dev)740 return NULL;741 742 priv = dev->priv;743 priv->hw = dev;744 priv->mode = NL80211_IFTYPE_UNSPECIFIED;745 priv->basic_rate_mask = 0x15f;746 spin_lock_init(&priv->tx_stats_lock);747 skb_queue_head_init(&priv->tx_queue);748 skb_queue_head_init(&priv->tx_pending);749 ieee80211_hw_set(dev, REPORTS_TX_ACK_STATUS);750 ieee80211_hw_set(dev, MFP_CAPABLE);751 ieee80211_hw_set(dev, PS_NULLFUNC_STACK);752 ieee80211_hw_set(dev, SUPPORTS_PS);753 ieee80211_hw_set(dev, RX_INCLUDES_FCS);754 ieee80211_hw_set(dev, SIGNAL_DBM);755 756 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |757 BIT(NL80211_IFTYPE_ADHOC) |758 BIT(NL80211_IFTYPE_AP) |759 BIT(NL80211_IFTYPE_MESH_POINT);760 761 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 it772 * here, but setting it correctly to 4/2 or so would limit us773 * artificially if the RC algorithm wants just two rates, so774 * let's say 4/7, we'll redistribute it at TX time, see the775 * 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 affects784 * 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 eth_broadcast_addr(priv->mc_maclist[0]);796 priv->curchan = NULL;797 p54_reset_stats(priv);798 return dev;799}800EXPORT_SYMBOL_GPL(p54_init_common);801 802int 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_LEDS815 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}825EXPORT_SYMBOL_GPL(p54_register_common);826 827void 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 < NUM_NL80211_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 bitmap_free(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}849EXPORT_SYMBOL_GPL(p54_free_common);850 851void p54_unregister_common(struct ieee80211_hw *dev)852{853 struct p54_common *priv = dev->priv;854 855 if (priv->registered) {856 priv->registered = false;857#ifdef CONFIG_P54_LEDS858 p54_unregister_leds(priv);859#endif /* CONFIG_P54_LEDS */860 ieee80211_unregister_hw(dev);861 }862 863 mutex_destroy(&priv->conf_mutex);864 mutex_destroy(&priv->eeprom_mutex);865}866EXPORT_SYMBOL_GPL(p54_unregister_common);867