drivers/net/wireless/p54/main.c

   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/slab.h>
  21 #include <linux/firmware.h>
  22 #include <linux/etherdevice.h>
  23
  24 #include <net/mac80211.h>
  25
  26 #include "p54.h"
  27 #include "lmac.h"
  28
  29 static int modparam_nohwcrypt;
  30 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
  31 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
  32 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
  33 MODULE_DESCRIPTION("Softmac Prism54 common code");
  34 MODULE_LICENSE("GPL");
  35 MODULE_ALIAS("prism54common");
  36
  37 static int p54_sta_add_remove(struct ieee80211_hw *hw,
  38                               struct ieee80211_vif *vif,
  39                               struct ieee80211_sta *sta)
  40 {
  41         struct p54_common *priv = hw->priv;
  42
  43         /*
  44          * Notify the firmware that we don't want or we don't
  45          * need to buffer frames for this station anymore.
  46          */
  47
  48         p54_sta_unlock(priv, sta->addr);
  49
  50         return 0;
  51 }
  52
  53 static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
  54                               enum sta_notify_cmd notify_cmd,
  55                               struct ieee80211_sta *sta)
  56 {
  57         struct p54_common *priv = dev->priv;
  58
  59         switch (notify_cmd) {
  60         case STA_NOTIFY_AWAKE:
  61                 /* update the firmware's filter table */
  62                 p54_sta_unlock(priv, sta->addr);
  63                 break;
  64         default:
  65                 break;
  66         }
  67 }
  68
  69 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
  70                         bool set)
  71 {
  72         struct p54_common *priv = dev->priv;
  73
  74         return p54_update_beacon_tim(priv, sta->aid, set);
  75 }
  76
  77 u8 *p54_find_ie(struct sk_buff *skb, u8 ie)
  78 {
  79         struct ieee80211_mgmt *mgmt = (void *)skb->data;
  80         u8 *pos, *end;
  81
  82         if (skb->len <= sizeof(mgmt))
  83                 return NULL;
  84
  85         pos = (u8 *)mgmt->u.beacon.variable;
  86         end = skb->data + skb->len;
  87         while (pos < end) {
  88                 if (pos + 2 + pos[1] > end)
  89                         return NULL;
  90
  91                 if (pos[0] == ie)
  92                         return pos;
  93
  94                 pos += 2 + pos[1];
  95         }
  96         return NULL;
  97 }
  98
  99 static int p54_beacon_format_ie_tim(struct sk_buff *skb)
 100 {
 101         /*
 102          * the good excuse for this mess is ... the firmware.
 103          * The dummy TIM MUST be at the end of the beacon frame,
 104          * because it'll be overwritten!
 105          */
 106         u8 *tim;
 107         u8 dtim_len;
 108         u8 dtim_period;
 109         u8 *next;
 110
 111         tim = p54_find_ie(skb, WLAN_EID_TIM);
 112         if (!tim)
 113                 return 0;
 114
 115         dtim_len = tim[1];
 116         dtim_period = tim[3];
 117         next = tim + 2 + dtim_len;
 118
 119         if (dtim_len < 3)
 120                 return -EINVAL;
 121
 122         memmove(tim, next, skb_tail_pointer(skb) - next);
 123         tim = skb_tail_pointer(skb) - (dtim_len + 2);
 124
 125         /* add the dummy at the end */
 126         tim[0] = WLAN_EID_TIM;
 127         tim[1] = 3;
 128         tim[2] = 0;
 129         tim[3] = dtim_period;
 130         tim[4] = 0;
 131
 132         if (dtim_len > 3)
 133                 skb_trim(skb, skb->len - (dtim_len - 3));
 134
 135         return 0;
 136 }
 137
 138 static int p54_beacon_update(struct p54_common *priv,
 139                         struct ieee80211_vif *vif)
 140 {
 141         struct sk_buff *beacon;
 142         int ret;
 143
 144         beacon = ieee80211_beacon_get(priv->hw, vif);
 145         if (!beacon)
 146                 return -ENOMEM;
 147         ret = p54_beacon_format_ie_tim(beacon);
 148         if (ret)
 149                 return ret;
 150
 151         /*
 152          * During operation, the firmware takes care of beaconing.
 153          * The driver only needs to upload a new beacon template, once
 154          * the template was changed by the stack or userspace.
 155          *
 156          * LMAC API 3.2.2 also specifies that the driver does not need
 157          * to cancel the old beacon template by hand, instead the firmware
 158          * will release the previous one through the feedback mechanism.
 159          */
 160         p54_tx_80211(priv->hw, beacon);
 161         priv->tsf_high32 = 0;
 162         priv->tsf_low32 = 0;
 163
 164         return 0;
 165 }
 166
 167 static int p54_start(struct ieee80211_hw *dev)
 168 {
 169         struct p54_common *priv = dev->priv;
 170         int err;
 171
 172         mutex_lock(&priv->conf_mutex);
 173         err = priv->open(dev);
 174         if (err)
 175                 goto out;
 176         P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
 177         P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
 178         P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
 179         P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
 180         err = p54_set_edcf(priv);
 181         if (err)
 182                 goto out;
 183
 184         memset(priv->bssid, ~0, ETH_ALEN);
 185         priv->mode = NL80211_IFTYPE_MONITOR;
 186         err = p54_setup_mac(priv);
 187         if (err) {
 188                 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
 189                 goto out;
 190         }
 191
 192         ieee80211_queue_delayed_work(dev, &priv->work, 0);
 193
 194         priv->softled_state = 0;
 195         err = p54_set_leds(priv);
 196
 197 out:
 198         mutex_unlock(&priv->conf_mutex);
 199         return err;
 200 }
 201
 202 static void p54_stop(struct ieee80211_hw *dev)
 203 {
 204         struct p54_common *priv = dev->priv;
 205         int i;
 206
 207         mutex_lock(&priv->conf_mutex);
 208         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
 209         priv->softled_state = 0;
 210         p54_set_leds(priv);
 211
 212         cancel_delayed_work_sync(&priv->work);
 213
 214         priv->stop(dev);
 215         skb_queue_purge(&priv->tx_pending);
 216         skb_queue_purge(&priv->tx_queue);
 217         for (i = 0; i < P54_QUEUE_NUM; i++) {
 218                 priv->tx_stats[i].count = 0;
 219                 priv->tx_stats[i].len = 0;
 220         }
 221
 222         priv->beacon_req_id = cpu_to_le32(0);
 223         priv->tsf_high32 = priv->tsf_low32 = 0;
 224         mutex_unlock(&priv->conf_mutex);
 225 }
 226
 227 static int p54_add_interface(struct ieee80211_hw *dev,
 228                              struct ieee80211_vif *vif)
 229 {
 230         struct p54_common *priv = dev->priv;
 231
 232         mutex_lock(&priv->conf_mutex);
 233         if (priv->mode != NL80211_IFTYPE_MONITOR) {
 234                 mutex_unlock(&priv->conf_mutex);
 235                 return -EOPNOTSUPP;
 236         }
 237
 238         priv->vif = vif;
 239
 240         switch (vif->type) {
 241         case NL80211_IFTYPE_STATION:
 242         case NL80211_IFTYPE_ADHOC:
 243         case NL80211_IFTYPE_AP:
 244         case NL80211_IFTYPE_MESH_POINT:
 245                 priv->mode = vif->type;
 246                 break;
 247         default:
 248                 mutex_unlock(&priv->conf_mutex);
 249                 return -EOPNOTSUPP;
 250         }
 251
 252         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
 253         p54_setup_mac(priv);
 254         mutex_unlock(&priv->conf_mutex);
 255         return 0;
 256 }
 257
 258 static void p54_remove_interface(struct ieee80211_hw *dev,
 259                                  struct ieee80211_vif *vif)
 260 {
 261         struct p54_common *priv = dev->priv;
 262
 263         mutex_lock(&priv->conf_mutex);
 264         priv->vif = NULL;
 265
 266         /*
 267          * LMAC API 3.2.2 states that any active beacon template must be
 268          * canceled by the driver before attempting a mode transition.
 269          */
 270         if (le32_to_cpu(priv->beacon_req_id) != 0) {
 271                 p54_tx_cancel(priv, priv->beacon_req_id);
 272                 wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ);
 273         }
 274         priv->mode = NL80211_IFTYPE_MONITOR;
 275         memset(priv->mac_addr, 0, ETH_ALEN);
 276         memset(priv->bssid, 0, ETH_ALEN);
 277         p54_setup_mac(priv);
 278         mutex_unlock(&priv->conf_mutex);
 279 }
 280
 281 static int p54_config(struct ieee80211_hw *dev, u32 changed)
 282 {
 283         int ret = 0;
 284         struct p54_common *priv = dev->priv;
 285         struct ieee80211_conf *conf = &dev->conf;
 286
 287         mutex_lock(&priv->conf_mutex);
 288         if (changed & IEEE80211_CONF_CHANGE_POWER)
 289                 priv->output_power = conf->power_level << 2;
 290         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
 291                 ret = p54_scan(priv, P54_SCAN_EXIT, 0);
 292                 if (ret)
 293                         goto out;
 294         }
 295         if (changed & IEEE80211_CONF_CHANGE_PS) {
 296                 ret = p54_set_ps(priv);
 297                 if (ret)
 298                         goto out;
 299         }
 300         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 301                 ret = p54_setup_mac(priv);
 302                 if (ret)
 303                         goto out;
 304         }
 305
 306 out:
 307         mutex_unlock(&priv->conf_mutex);
 308         return ret;
 309 }
 310
 311 static u64 p54_prepare_multicast(struct ieee80211_hw *dev,
 312                                  struct netdev_hw_addr_list *mc_list)
 313 {
 314         struct p54_common *priv = dev->priv;
 315         struct netdev_hw_addr *ha;
 316         int i;
 317
 318         BUILD_BUG_ON(ARRAY_SIZE(priv->mc_maclist) !=
 319                 ARRAY_SIZE(((struct p54_group_address_table *)NULL)->mac_list));
 320         /*
 321          * The first entry is reserved for the global broadcast MAC.
 322          * Otherwise the firmware will drop it and ARP will no longer work.
 323          */
 324         i = 1;
 325         priv->mc_maclist_num = netdev_hw_addr_list_count(mc_list) + i;
 326         netdev_hw_addr_list_for_each(ha, mc_list) {
 327                 memcpy(&priv->mc_maclist[i], ha->addr, ETH_ALEN);
 328                 i++;
 329                 if (i >= ARRAY_SIZE(priv->mc_maclist))
 330                         break;
 331         }
 332
 333         return 1; /* update */
 334 }
 335
 336 static void p54_configure_filter(struct ieee80211_hw *dev,
 337                                  unsigned int changed_flags,
 338                                  unsigned int *total_flags,
 339                                  u64 multicast)
 340 {
 341         struct p54_common *priv = dev->priv;
 342
 343         *total_flags &= FIF_PROMISC_IN_BSS |
 344                         FIF_ALLMULTI |
 345                         FIF_OTHER_BSS;
 346
 347         priv->filter_flags = *total_flags;
 348
 349         if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS))
 350                 p54_setup_mac(priv);
 351
 352         if (changed_flags & FIF_ALLMULTI || multicast)
 353                 p54_set_groupfilter(priv);
 354 }
 355
 356 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
 357                        const struct ieee80211_tx_queue_params *params)
 358 {
 359         struct p54_common *priv = dev->priv;
 360         int ret;
 361
 362         mutex_lock(&priv->conf_mutex);
 363         if (queue < dev->queues) {
 364                 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
 365                         params->cw_min, params->cw_max, params->txop);
 366                 ret = p54_set_edcf(priv);
 367         } else
 368                 ret = -EINVAL;
 369         mutex_unlock(&priv->conf_mutex);
 370         return ret;
 371 }
 372
 373 static void p54_work(struct work_struct *work)
 374 {
 375         struct p54_common *priv = container_of(work, struct p54_common,
 376                                                work.work);
 377
 378         if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
 379                 return ;
 380
 381         /*
 382          * TODO: walk through tx_queue and do the following tasks
 383          *      1. initiate bursts.
 384          *      2. cancel stuck frames / reset the device if necessary.
 385          */
 386
 387         p54_fetch_statistics(priv);
 388 }
 389
 390 static int p54_get_stats(struct ieee80211_hw *dev,
 391                          struct ieee80211_low_level_stats *stats)
 392 {
 393         struct p54_common *priv = dev->priv;
 394
 395         memcpy(stats, &priv->stats, sizeof(*stats));
 396         return 0;
 397 }
 398
 399 static void p54_bss_info_changed(struct ieee80211_hw *dev,
 400                                  struct ieee80211_vif *vif,
 401                                  struct ieee80211_bss_conf *info,
 402                                  u32 changed)
 403 {
 404         struct p54_common *priv = dev->priv;
 405
 406         mutex_lock(&priv->conf_mutex);
 407         if (changed & BSS_CHANGED_BSSID) {
 408                 memcpy(priv->bssid, info->bssid, ETH_ALEN);
 409                 p54_setup_mac(priv);
 410         }
 411
 412         if (changed & BSS_CHANGED_BEACON) {
 413                 p54_scan(priv, P54_SCAN_EXIT, 0);
 414                 p54_setup_mac(priv);
 415                 p54_beacon_update(priv, vif);
 416                 p54_set_edcf(priv);
 417         }
 418
 419         if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {
 420                 priv->use_short_slot = info->use_short_slot;
 421                 p54_set_edcf(priv);
 422         }
 423         if (changed & BSS_CHANGED_BASIC_RATES) {
 424                 if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
 425                         priv->basic_rate_mask = (info->basic_rates << 4);
 426                 else
 427                         priv->basic_rate_mask = info->basic_rates;
 428                 p54_setup_mac(priv);
 429                 if (priv->fw_var >= 0x500)
 430                         p54_scan(priv, P54_SCAN_EXIT, 0);
 431         }
 432         if (changed & BSS_CHANGED_ASSOC) {
 433                 if (info->assoc) {
 434                         priv->aid = info->aid;
 435                         priv->wakeup_timer = info->beacon_int *
 436                                              info->dtim_period * 5;
 437                         p54_setup_mac(priv);
 438                 } else {
 439                         priv->wakeup_timer = 500;
 440                         priv->aid = 0;
 441                 }
 442         }
 443
 444         mutex_unlock(&priv->conf_mutex);
 445 }
 446
 447 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
 448                        struct ieee80211_vif *vif, struct ieee80211_sta *sta,
 449                        struct ieee80211_key_conf *key)
 450 {
 451         struct p54_common *priv = dev->priv;
 452         int slot, ret = 0;
 453         u8 algo = 0;
 454         u8 *addr = NULL;
 455
 456         if (modparam_nohwcrypt)
 457                 return -EOPNOTSUPP;
 458
 459         mutex_lock(&priv->conf_mutex);
 460         if (cmd == SET_KEY) {
 461                 switch (key->cipher) {
 462                 case WLAN_CIPHER_SUITE_TKIP:
 463                         if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
 464                               BR_DESC_PRIV_CAP_TKIP))) {
 465                                 ret = -EOPNOTSUPP;
 466                                 goto out_unlock;
 467                         }
 468                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 469                         algo = P54_CRYPTO_TKIPMICHAEL;
 470                         break;
 471                 case WLAN_CIPHER_SUITE_WEP40:
 472                 case WLAN_CIPHER_SUITE_WEP104:
 473                         if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {
 474                                 ret = -EOPNOTSUPP;
 475                                 goto out_unlock;
 476                         }
 477                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 478                         algo = P54_CRYPTO_WEP;
 479                         break;
 480                 case WLAN_CIPHER_SUITE_CCMP:
 481                         if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {
 482                                 ret = -EOPNOTSUPP;
 483                                 goto out_unlock;
 484                         }
 485                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 486                         algo = P54_CRYPTO_AESCCMP;
 487                         break;
 488                 default:
 489                         ret = -EOPNOTSUPP;
 490                         goto out_unlock;
 491                 }
 492                 slot = bitmap_find_free_region(priv->used_rxkeys,
 493                                                priv->rx_keycache_size, 0);
 494
 495                 if (slot < 0) {
 496                         /*
 497                          * The device supports the chosen algorithm, but the
 498                          * firmware does not provide enough key slots to store
 499                          * all of them.
 500                          * But encryption offload for outgoing frames is always
 501                          * possible, so we just pretend that the upload was
 502                          * successful and do the decryption in software.
 503                          */
 504
 505                         /* mark the key as invalid. */
 506                         key->hw_key_idx = 0xff;
 507                         goto out_unlock;
 508                 }
 509         } else {
 510                 slot = key->hw_key_idx;
 511
 512                 if (slot == 0xff) {
 513                         /* This key was not uploaded into the rx key cache. */
 514
 515                         goto out_unlock;
 516                 }
 517
 518                 bitmap_release_region(priv->used_rxkeys, slot, 0);
 519                 algo = 0;
 520         }
 521
 522         if (sta)
 523                 addr = sta->addr;
 524
 525         ret = p54_upload_key(priv, algo, slot, key->keyidx,
 526                              key->keylen, addr, key->key);
 527         if (ret) {
 528                 bitmap_release_region(priv->used_rxkeys, slot, 0);
 529                 ret = -EOPNOTSUPP;
 530                 goto out_unlock;
 531         }
 532
 533         key->hw_key_idx = slot;
 534
 535 out_unlock:
 536         mutex_unlock(&priv->conf_mutex);
 537         return ret;
 538 }
 539
 540 static int p54_get_survey(struct ieee80211_hw *dev, int idx,
 541                                 struct survey_info *survey)
 542 {
 543         struct p54_common *priv = dev->priv;
 544         struct ieee80211_conf *conf = &dev->conf;
 545
 546         if (idx != 0)
 547                 return -ENOENT;
 548
 549         survey->channel = conf->channel;
 550         survey->filled = SURVEY_INFO_NOISE_DBM;
 551         survey->noise = clamp_t(s8, priv->noise, -128, 127);
 552
 553         return 0;
 554 }
 555
 556 static unsigned int p54_flush_count(struct p54_common *priv)
 557 {
 558         unsigned int total = 0, i;
 559
 560         BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats));
 561
 562         /*
 563          * Because the firmware has the sole control over any frames
 564          * in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they
 565          * don't really count as pending or active.
 566          */
 567         for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++)
 568                 total += priv->tx_stats[i].len;
 569         return total;
 570 }
 571
 572 static void p54_flush(struct ieee80211_hw *dev, bool drop)
 573 {
 574         struct p54_common *priv = dev->priv;
 575         unsigned int total, i;
 576
 577         /*
 578          * Currently, it wouldn't really matter if we wait for one second
 579          * or 15 minutes. But once someone gets around and completes the
 580          * TODOs [ancel stuck frames / reset device] in p54_work, it will
 581          * suddenly make sense to wait that long.
 582          */
 583         i = P54_STATISTICS_UPDATE * 2 / 20;
 584
 585         /*
 586          * In this case no locking is required because as we speak the
 587          * queues have already been stopped and no new frames can sneak
 588          * up from behind.
 589          */
 590         while ((total = p54_flush_count(priv) && i--)) {
 591                 /* waste time */
 592                 msleep(20);
 593         }
 594
 595         WARN(total, "tx flush timeout, unresponsive firmware");
 596 }
 597
 598 static void p54_set_coverage_class(struct ieee80211_hw *dev, u8 coverage_class)
 599 {
 600         struct p54_common *priv = dev->priv;
 601
 602         mutex_lock(&priv->conf_mutex);
 603         /* support all coverage class values as in 802.11-2007 Table 7-27 */
 604         priv->coverage_class = clamp_t(u8, coverage_class, 0, 31);
 605         p54_set_edcf(priv);
 606         mutex_unlock(&priv->conf_mutex);
 607 }
 608
 609 static const struct ieee80211_ops p54_ops = {
 610         .tx                     = p54_tx_80211,
 611         .start                  = p54_start,
 612         .stop                   = p54_stop,
 613         .add_interface          = p54_add_interface,
 614         .remove_interface       = p54_remove_interface,
 615         .set_tim                = p54_set_tim,
 616         .sta_notify             = p54_sta_notify,
 617         .sta_add                = p54_sta_add_remove,
 618         .sta_remove             = p54_sta_add_remove,
 619         .set_key                = p54_set_key,
 620         .config                 = p54_config,
 621         .flush                  = p54_flush,
 622         .bss_info_changed       = p54_bss_info_changed,
 623         .prepare_multicast      = p54_prepare_multicast,
 624         .configure_filter       = p54_configure_filter,
 625         .conf_tx                = p54_conf_tx,
 626         .get_stats              = p54_get_stats,
 627         .get_survey             = p54_get_survey,
 628         .set_coverage_class     = p54_set_coverage_class,
 629 };
 630
 631 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
 632 {
 633         struct ieee80211_hw *dev;
 634         struct p54_common *priv;
 635
 636         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
 637         if (!dev)
 638                 return NULL;
 639
 640         priv = dev->priv;
 641         priv->hw = dev;
 642         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
 643         priv->basic_rate_mask = 0x15f;
 644         spin_lock_init(&priv->tx_stats_lock);
 645         skb_queue_head_init(&priv->tx_queue);
 646         skb_queue_head_init(&priv->tx_pending);
 647         dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
 648                      IEEE80211_HW_SIGNAL_DBM |
 649                      IEEE80211_HW_SUPPORTS_PS |
 650                      IEEE80211_HW_PS_NULLFUNC_STACK |
 651                      IEEE80211_HW_BEACON_FILTER |
 652                      IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 653
 654         dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 655                                       BIT(NL80211_IFTYPE_ADHOC) |
 656                                       BIT(NL80211_IFTYPE_AP) |
 657                                       BIT(NL80211_IFTYPE_MESH_POINT);
 658
 659         dev->channel_change_time = 1000;        /* TODO: find actual value */
 660         priv->beacon_req_id = cpu_to_le32(0);
 661         priv->tx_stats[P54_QUEUE_BEACON].limit = 1;
 662         priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1;
 663         priv->tx_stats[P54_QUEUE_MGMT].limit = 3;
 664         priv->tx_stats[P54_QUEUE_CAB].limit = 3;
 665         priv->tx_stats[P54_QUEUE_DATA].limit = 5;
 666         dev->queues = 1;
 667         priv->noise = -94;
 668         /*
 669          * We support at most 8 tries no matter which rate they're at,
 670          * we cannot support max_rates * max_rate_tries as we set it
 671          * here, but setting it correctly to 4/2 or so would limit us
 672          * artificially if the RC algorithm wants just two rates, so
 673          * let's say 4/7, we'll redistribute it at TX time, see the
 674          * comments there.
 675          */
 676         dev->max_rates = 4;
 677         dev->max_rate_tries = 7;
 678         dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
 679                                  sizeof(struct p54_tx_data);
 680
 681         /*
 682          * For now, disable PS by default because it affects
 683          * link stability significantly.
 684          */
 685         dev->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 686
 687         mutex_init(&priv->conf_mutex);
 688         mutex_init(&priv->eeprom_mutex);
 689         init_completion(&priv->eeprom_comp);
 690         init_completion(&priv->beacon_comp);
 691         INIT_DELAYED_WORK(&priv->work, p54_work);
 692
 693         memset(&priv->mc_maclist[0], ~0, ETH_ALEN);
 694         return dev;
 695 }
 696 EXPORT_SYMBOL_GPL(p54_init_common);
 697
 698 int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
 699 {
 700         struct p54_common __maybe_unused *priv = dev->priv;
 701         int err;
 702
 703         err = ieee80211_register_hw(dev);
 704         if (err) {
 705                 dev_err(pdev, "Cannot register device (%d).\n", err);
 706                 return err;
 707         }
 708
 709 #ifdef CONFIG_P54_LEDS
 710         err = p54_init_leds(priv);
 711         if (err)
 712                 return err;
 713 #endif /* CONFIG_P54_LEDS */
 714
 715         dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
 716         return 0;
 717 }
 718 EXPORT_SYMBOL_GPL(p54_register_common);
 719
 720 void p54_free_common(struct ieee80211_hw *dev)
 721 {
 722         struct p54_common *priv = dev->priv;
 723         unsigned int i;
 724
 725         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
 726                 kfree(priv->band_table[i]);
 727
 728         kfree(priv->iq_autocal);
 729         kfree(priv->output_limit);
 730         kfree(priv->curve_data);
 731         kfree(priv->rssi_db);
 732         kfree(priv->used_rxkeys);
 733         priv->iq_autocal = NULL;
 734         priv->output_limit = NULL;
 735         priv->curve_data = NULL;
 736         priv->rssi_db = NULL;
 737         priv->used_rxkeys = NULL;
 738         ieee80211_free_hw(dev);
 739 }
 740 EXPORT_SYMBOL_GPL(p54_free_common);
 741
 742 void p54_unregister_common(struct ieee80211_hw *dev)
 743 {
 744         struct p54_common *priv = dev->priv;
 745
 746 #ifdef CONFIG_P54_LEDS
 747         p54_unregister_leds(priv);
 748 #endif /* CONFIG_P54_LEDS */
 749
 750         ieee80211_unregister_hw(dev);
 751         mutex_destroy(&priv->conf_mutex);
 752         mutex_destroy(&priv->eeprom_mutex);
 753 }
 754 EXPORT_SYMBOL_GPL(p54_unregister_common);