drivers/net/wireless/ath/ath9k/main.c

   1 /*
   2  * Copyright (c) 2008-2009 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/nl80211.h>
  18 #include "ath9k.h"
  19 #include "btcoex.h"
  20
  21 static void ath_update_txpow(struct ath_softc *sc)
  22 {
  23         struct ath_hw *ah = sc->sc_ah;
  24
  25         if (sc->curtxpow != sc->config.txpowlimit) {
  26                 ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit);
  27                 /* read back in case value is clamped */
  28                 sc->curtxpow = ath9k_hw_regulatory(ah)->power_limit;
  29         }
  30 }
  31
  32 static u8 parse_mpdudensity(u8 mpdudensity)
  33 {
  34         /*
  35          * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
  36          *   0 for no restriction
  37          *   1 for 1/4 us
  38          *   2 for 1/2 us
  39          *   3 for 1 us
  40          *   4 for 2 us
  41          *   5 for 4 us
  42          *   6 for 8 us
  43          *   7 for 16 us
  44          */
  45         switch (mpdudensity) {
  46         case 0:
  47                 return 0;
  48         case 1:
  49         case 2:
  50         case 3:
  51                 /* Our lower layer calculations limit our precision to
  52                    1 microsecond */
  53                 return 1;
  54         case 4:
  55                 return 2;
  56         case 5:
  57                 return 4;
  58         case 6:
  59                 return 8;
  60         case 7:
  61                 return 16;
  62         default:
  63                 return 0;
  64         }
  65 }
  66
  67 static struct ath9k_channel *ath_get_curchannel(struct ath_softc *sc,
  68                                                 struct ieee80211_hw *hw)
  69 {
  70         struct ieee80211_channel *curchan = hw->conf.channel;
  71         struct ath9k_channel *channel;
  72         u8 chan_idx;
  73
  74         chan_idx = curchan->hw_value;
  75         channel = &sc->sc_ah->channels[chan_idx];
  76         ath9k_update_ichannel(sc, hw, channel);
  77         return channel;
  78 }
  79
  80 bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
  81 {
  82         unsigned long flags;
  83         bool ret;
  84
  85         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  86         ret = ath9k_hw_setpower(sc->sc_ah, mode);
  87         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
  88
  89         return ret;
  90 }
  91
  92 void ath9k_ps_wakeup(struct ath_softc *sc)
  93 {
  94         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
  95         unsigned long flags;
  96         enum ath9k_power_mode power_mode;
  97
  98         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  99         if (++sc->ps_usecount != 1)
 100                 goto unlock;
 101
 102         power_mode = sc->sc_ah->power_mode;
 103         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
 104
 105         /*
 106          * While the hardware is asleep, the cycle counters contain no
 107          * useful data. Better clear them now so that they don't mess up
 108          * survey data results.
 109          */
 110         if (power_mode != ATH9K_PM_AWAKE) {
 111                 spin_lock(&common->cc_lock);
 112                 ath_hw_cycle_counters_update(common);
 113                 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
 114                 spin_unlock(&common->cc_lock);
 115         }
 116
 117  unlock:
 118         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 119 }
 120
 121 void ath9k_ps_restore(struct ath_softc *sc)
 122 {
 123         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 124         unsigned long flags;
 125
 126         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 127         if (--sc->ps_usecount != 0)
 128                 goto unlock;
 129
 130         spin_lock(&common->cc_lock);
 131         ath_hw_cycle_counters_update(common);
 132         spin_unlock(&common->cc_lock);
 133
 134         if (sc->ps_idle)
 135                 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
 136         else if (sc->ps_enabled &&
 137                  !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
 138                               PS_WAIT_FOR_CAB |
 139                               PS_WAIT_FOR_PSPOLL_DATA |
 140                               PS_WAIT_FOR_TX_ACK)))
 141                 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
 142
 143  unlock:
 144         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 145 }
 146
 147 static void ath_start_ani(struct ath_common *common)
 148 {
 149         struct ath_hw *ah = common->ah;
 150         unsigned long timestamp = jiffies_to_msecs(jiffies);
 151         struct ath_softc *sc = (struct ath_softc *) common->priv;
 152
 153         if (!(sc->sc_flags & SC_OP_ANI_RUN))
 154                 return;
 155
 156         if (sc->sc_flags & SC_OP_OFFCHANNEL)
 157                 return;
 158
 159         common->ani.longcal_timer = timestamp;
 160         common->ani.shortcal_timer = timestamp;
 161         common->ani.checkani_timer = timestamp;
 162
 163         mod_timer(&common->ani.timer,
 164                   jiffies +
 165                         msecs_to_jiffies((u32)ah->config.ani_poll_interval));
 166 }
 167
 168 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
 169 {
 170         struct ath_hw *ah = sc->sc_ah;
 171         struct ath9k_channel *chan = &ah->channels[channel];
 172         struct survey_info *survey = &sc->survey[channel];
 173
 174         if (chan->noisefloor) {
 175                 survey->filled |= SURVEY_INFO_NOISE_DBM;
 176                 survey->noise = chan->noisefloor;
 177         }
 178 }
 179
 180 static void ath_update_survey_stats(struct ath_softc *sc)
 181 {
 182         struct ath_hw *ah = sc->sc_ah;
 183         struct ath_common *common = ath9k_hw_common(ah);
 184         int pos = ah->curchan - &ah->channels[0];
 185         struct survey_info *survey = &sc->survey[pos];
 186         struct ath_cycle_counters *cc = &common->cc_survey;
 187         unsigned int div = common->clockrate * 1000;
 188
 189         if (!ah->curchan)
 190                 return;
 191
 192         if (ah->power_mode == ATH9K_PM_AWAKE)
 193                 ath_hw_cycle_counters_update(common);
 194
 195         if (cc->cycles > 0) {
 196                 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
 197                         SURVEY_INFO_CHANNEL_TIME_BUSY |
 198                         SURVEY_INFO_CHANNEL_TIME_RX |
 199                         SURVEY_INFO_CHANNEL_TIME_TX;
 200                 survey->channel_time += cc->cycles / div;
 201                 survey->channel_time_busy += cc->rx_busy / div;
 202                 survey->channel_time_rx += cc->rx_frame / div;
 203                 survey->channel_time_tx += cc->tx_frame / div;
 204         }
 205         memset(cc, 0, sizeof(*cc));
 206
 207         ath_update_survey_nf(sc, pos);
 208 }
 209
 210 /*
 211  * Set/change channels.  If the channel is really being changed, it's done
 212  * by reseting the chip.  To accomplish this we must first cleanup any pending
 213  * DMA, then restart stuff.
 214 */
 215 int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 216                     struct ath9k_channel *hchan)
 217 {
 218         struct ath_wiphy *aphy = hw->priv;
 219         struct ath_hw *ah = sc->sc_ah;
 220         struct ath_common *common = ath9k_hw_common(ah);
 221         struct ieee80211_conf *conf = &common->hw->conf;
 222         bool fastcc = true, stopped;
 223         struct ieee80211_channel *channel = hw->conf.channel;
 224         struct ath9k_hw_cal_data *caldata = NULL;
 225         int r;
 226
 227         if (sc->sc_flags & SC_OP_INVALID)
 228                 return -EIO;
 229
 230         del_timer_sync(&common->ani.timer);
 231         cancel_work_sync(&sc->paprd_work);
 232         cancel_work_sync(&sc->hw_check_work);
 233         cancel_delayed_work_sync(&sc->tx_complete_work);
 234
 235         ath9k_ps_wakeup(sc);
 236
 237         /*
 238          * This is only performed if the channel settings have
 239          * actually changed.
 240          *
 241          * To switch channels clear any pending DMA operations;
 242          * wait long enough for the RX fifo to drain, reset the
 243          * hardware at the new frequency, and then re-enable
 244          * the relevant bits of the h/w.
 245          */
 246         ath9k_hw_set_interrupts(ah, 0);
 247         stopped = ath_drain_all_txq(sc, false);
 248
 249         spin_lock_bh(&sc->rx.pcu_lock);
 250
 251         if (!ath_stoprecv(sc))
 252                 stopped = false;
 253
 254         /* XXX: do not flush receive queue here. We don't want
 255          * to flush data frames already in queue because of
 256          * changing channel. */
 257
 258         if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
 259                 fastcc = false;
 260
 261         if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
 262                 caldata = &aphy->caldata;
 263
 264         ath_print(common, ATH_DBG_CONFIG,
 265                   "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
 266                   sc->sc_ah->curchan->channel,
 267                   channel->center_freq, conf_is_ht40(conf),
 268                   fastcc);
 269
 270         spin_lock_bh(&sc->sc_resetlock);
 271
 272         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 273         if (r) {
 274                 ath_print(common, ATH_DBG_FATAL,
 275                           "Unable to reset channel (%u MHz), "
 276                           "reset status %d\n",
 277                           channel->center_freq, r);
 278                 spin_unlock_bh(&sc->sc_resetlock);
 279                 spin_unlock_bh(&sc->rx.pcu_lock);
 280                 goto ps_restore;
 281         }
 282         spin_unlock_bh(&sc->sc_resetlock);
 283
 284         if (ath_startrecv(sc) != 0) {
 285                 ath_print(common, ATH_DBG_FATAL,
 286                           "Unable to restart recv logic\n");
 287                 r = -EIO;
 288                 spin_unlock_bh(&sc->rx.pcu_lock);
 289                 goto ps_restore;
 290         }
 291
 292         spin_unlock_bh(&sc->rx.pcu_lock);
 293
 294         ath_update_txpow(sc);
 295         ath9k_hw_set_interrupts(ah, ah->imask);
 296
 297         if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
 298                 ath_beacon_config(sc, NULL);
 299                 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 300                 ath_start_ani(common);
 301         }
 302
 303  ps_restore:
 304         ath9k_ps_restore(sc);
 305         return r;
 306 }
 307
 308 static void ath_paprd_activate(struct ath_softc *sc)
 309 {
 310         struct ath_hw *ah = sc->sc_ah;
 311         struct ath9k_hw_cal_data *caldata = ah->caldata;
 312         struct ath_common *common = ath9k_hw_common(ah);
 313         int chain;
 314
 315         if (!caldata || !caldata->paprd_done)
 316                 return;
 317
 318         ath9k_ps_wakeup(sc);
 319         ar9003_paprd_enable(ah, false);
 320         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 321                 if (!(common->tx_chainmask & BIT(chain)))
 322                         continue;
 323
 324                 ar9003_paprd_populate_single_table(ah, caldata, chain);
 325         }
 326
 327         ar9003_paprd_enable(ah, true);
 328         ath9k_ps_restore(sc);
 329 }
 330
 331 void ath_paprd_calibrate(struct work_struct *work)
 332 {
 333         struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
 334         struct ieee80211_hw *hw = sc->hw;
 335         struct ath_hw *ah = sc->sc_ah;
 336         struct ieee80211_hdr *hdr;
 337         struct sk_buff *skb = NULL;
 338         struct ieee80211_tx_info *tx_info;
 339         int band = hw->conf.channel->band;
 340         struct ieee80211_supported_band *sband = &sc->sbands[band];
 341         struct ath_tx_control txctl;
 342         struct ath9k_hw_cal_data *caldata = ah->caldata;
 343         struct ath_common *common = ath9k_hw_common(ah);
 344         int qnum, ftype;
 345         int chain_ok = 0;
 346         int chain;
 347         int len = 1800;
 348         int time_left;
 349         int i;
 350
 351         if (!caldata)
 352                 return;
 353
 354         skb = alloc_skb(len, GFP_KERNEL);
 355         if (!skb)
 356                 return;
 357
 358         tx_info = IEEE80211_SKB_CB(skb);
 359
 360         skb_put(skb, len);
 361         memset(skb->data, 0, len);
 362         hdr = (struct ieee80211_hdr *)skb->data;
 363         ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
 364         hdr->frame_control = cpu_to_le16(ftype);
 365         hdr->duration_id = cpu_to_le16(10);
 366         memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
 367         memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
 368         memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
 369
 370         memset(&txctl, 0, sizeof(txctl));
 371         qnum = sc->tx.hwq_map[WME_AC_BE];
 372         txctl.txq = &sc->tx.txq[qnum];
 373
 374         ath9k_ps_wakeup(sc);
 375         ar9003_paprd_init_table(ah);
 376         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 377                 if (!(common->tx_chainmask & BIT(chain)))
 378                         continue;
 379
 380                 chain_ok = 0;
 381                 memset(tx_info, 0, sizeof(*tx_info));
 382                 tx_info->band = band;
 383
 384                 for (i = 0; i < 4; i++) {
 385                         tx_info->control.rates[i].idx = sband->n_bitrates - 1;
 386                         tx_info->control.rates[i].count = 6;
 387                 }
 388
 389                 init_completion(&sc->paprd_complete);
 390                 ar9003_paprd_setup_gain_table(ah, chain);
 391                 txctl.paprd = BIT(chain);
 392                 if (ath_tx_start(hw, skb, &txctl) != 0)
 393                         break;
 394
 395                 time_left = wait_for_completion_timeout(&sc->paprd_complete,
 396                                 msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
 397                 if (!time_left) {
 398                         ath_print(ath9k_hw_common(ah), ATH_DBG_CALIBRATE,
 399                                   "Timeout waiting for paprd training on "
 400                                   "TX chain %d\n",
 401                                   chain);
 402                         goto fail_paprd;
 403                 }
 404
 405                 if (!ar9003_paprd_is_done(ah))
 406                         break;
 407
 408                 if (ar9003_paprd_create_curve(ah, caldata, chain) != 0)
 409                         break;
 410
 411                 chain_ok = 1;
 412         }
 413         kfree_skb(skb);
 414
 415         if (chain_ok) {
 416                 caldata->paprd_done = true;
 417                 ath_paprd_activate(sc);
 418         }
 419
 420 fail_paprd:
 421         ath9k_ps_restore(sc);
 422 }
 423
 424 /*
 425  *  This routine performs the periodic noise floor calibration function
 426  *  that is used to adjust and optimize the chip performance.  This
 427  *  takes environmental changes (location, temperature) into account.
 428  *  When the task is complete, it reschedules itself depending on the
 429  *  appropriate interval that was calculated.
 430  */
 431 void ath_ani_calibrate(unsigned long data)
 432 {
 433         struct ath_softc *sc = (struct ath_softc *)data;
 434         struct ath_hw *ah = sc->sc_ah;
 435         struct ath_common *common = ath9k_hw_common(ah);
 436         bool longcal = false;
 437         bool shortcal = false;
 438         bool aniflag = false;
 439         unsigned int timestamp = jiffies_to_msecs(jiffies);
 440         u32 cal_interval, short_cal_interval, long_cal_interval;
 441         unsigned long flags;
 442
 443         if (ah->caldata && ah->caldata->nfcal_interference)
 444                 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
 445         else
 446                 long_cal_interval = ATH_LONG_CALINTERVAL;
 447
 448         short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
 449                 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
 450
 451         /* Only calibrate if awake */
 452         if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
 453                 goto set_timer;
 454
 455         ath9k_ps_wakeup(sc);
 456
 457         /* Long calibration runs independently of short calibration. */
 458         if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
 459                 longcal = true;
 460                 ath_print(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
 461                 common->ani.longcal_timer = timestamp;
 462         }
 463
 464         /* Short calibration applies only while caldone is false */
 465         if (!common->ani.caldone) {
 466                 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
 467                         shortcal = true;
 468                         ath_print(common, ATH_DBG_ANI,
 469                                   "shortcal @%lu\n", jiffies);
 470                         common->ani.shortcal_timer = timestamp;
 471                         common->ani.resetcal_timer = timestamp;
 472                 }
 473         } else {
 474                 if ((timestamp - common->ani.resetcal_timer) >=
 475                     ATH_RESTART_CALINTERVAL) {
 476                         common->ani.caldone = ath9k_hw_reset_calvalid(ah);
 477                         if (common->ani.caldone)
 478                                 common->ani.resetcal_timer = timestamp;
 479                 }
 480         }
 481
 482         /* Verify whether we must check ANI */
 483         if ((timestamp - common->ani.checkani_timer) >=
 484              ah->config.ani_poll_interval) {
 485                 aniflag = true;
 486                 common->ani.checkani_timer = timestamp;
 487         }
 488
 489         /* Skip all processing if there's nothing to do. */
 490         if (longcal || shortcal || aniflag) {
 491                 /* Call ANI routine if necessary */
 492                 if (aniflag) {
 493                         spin_lock_irqsave(&common->cc_lock, flags);
 494                         ath9k_hw_ani_monitor(ah, ah->curchan);
 495                         ath_update_survey_stats(sc);
 496                         spin_unlock_irqrestore(&common->cc_lock, flags);
 497                 }
 498
 499                 /* Perform calibration if necessary */
 500                 if (longcal || shortcal) {
 501                         common->ani.caldone =
 502                                 ath9k_hw_calibrate(ah,
 503                                                    ah->curchan,
 504                                                    common->rx_chainmask,
 505                                                    longcal);
 506                 }
 507         }
 508
 509         ath9k_ps_restore(sc);
 510
 511 set_timer:
 512         /*
 513         * Set timer interval based on previous results.
 514         * The interval must be the shortest necessary to satisfy ANI,
 515         * short calibration and long calibration.
 516         */
 517         cal_interval = ATH_LONG_CALINTERVAL;
 518         if (sc->sc_ah->config.enable_ani)
 519                 cal_interval = min(cal_interval,
 520                                    (u32)ah->config.ani_poll_interval);
 521         if (!common->ani.caldone)
 522                 cal_interval = min(cal_interval, (u32)short_cal_interval);
 523
 524         mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
 525         if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
 526                 if (!ah->caldata->paprd_done)
 527                         ieee80211_queue_work(sc->hw, &sc->paprd_work);
 528                 else
 529                         ath_paprd_activate(sc);
 530         }
 531 }
 532
 533 /*
 534  * Update tx/rx chainmask. For legacy association,
 535  * hard code chainmask to 1x1, for 11n association, use
 536  * the chainmask configuration, for bt coexistence, use
 537  * the chainmask configuration even in legacy mode.
 538  */
 539 void ath_update_chainmask(struct ath_softc *sc, int is_ht)
 540 {
 541         struct ath_hw *ah = sc->sc_ah;
 542         struct ath_common *common = ath9k_hw_common(ah);
 543
 544         if ((sc->sc_flags & SC_OP_OFFCHANNEL) || is_ht ||
 545             (ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE)) {
 546                 common->tx_chainmask = ah->caps.tx_chainmask;
 547                 common->rx_chainmask = ah->caps.rx_chainmask;
 548         } else {
 549                 common->tx_chainmask = 1;
 550                 common->rx_chainmask = 1;
 551         }
 552
 553         ath_print(common, ATH_DBG_CONFIG,
 554                   "tx chmask: %d, rx chmask: %d\n",
 555                   common->tx_chainmask,
 556                   common->rx_chainmask);
 557 }
 558
 559 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
 560 {
 561         struct ath_node *an;
 562
 563         an = (struct ath_node *)sta->drv_priv;
 564
 565         if (sc->sc_flags & SC_OP_TXAGGR) {
 566                 ath_tx_node_init(sc, an);
 567                 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
 568                                      sta->ht_cap.ampdu_factor);
 569                 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
 570                 an->last_rssi = ATH_RSSI_DUMMY_MARKER;
 571         }
 572 }
 573
 574 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 575 {
 576         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 577
 578         if (sc->sc_flags & SC_OP_TXAGGR)
 579                 ath_tx_node_cleanup(sc, an);
 580 }
 581
 582 void ath_hw_check(struct work_struct *work)
 583 {
 584         struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
 585         int i;
 586
 587         ath9k_ps_wakeup(sc);
 588
 589         for (i = 0; i < 3; i++) {
 590                 if (ath9k_hw_check_alive(sc->sc_ah))
 591                         goto out;
 592
 593                 msleep(1);
 594         }
 595         ath_reset(sc, true);
 596
 597 out:
 598         ath9k_ps_restore(sc);
 599 }
 600
 601 void ath9k_tasklet(unsigned long data)
 602 {
 603         struct ath_softc *sc = (struct ath_softc *)data;
 604         struct ath_hw *ah = sc->sc_ah;
 605         struct ath_common *common = ath9k_hw_common(ah);
 606
 607         u32 status = sc->intrstatus;
 608         u32 rxmask;
 609
 610         ath9k_ps_wakeup(sc);
 611
 612         if (status & ATH9K_INT_FATAL) {
 613                 ath_reset(sc, true);
 614                 ath9k_ps_restore(sc);
 615                 return;
 616         }
 617
 618         if (!ath9k_hw_check_alive(ah))
 619                 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
 620
 621         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 622                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
 623                           ATH9K_INT_RXORN);
 624         else
 625                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 626
 627         if (status & rxmask) {
 628                 spin_lock_bh(&sc->rx.pcu_lock);
 629
 630                 /* Check for high priority Rx first */
 631                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 632                     (status & ATH9K_INT_RXHP))
 633                         ath_rx_tasklet(sc, 0, true);
 634
 635                 ath_rx_tasklet(sc, 0, false);
 636                 spin_unlock_bh(&sc->rx.pcu_lock);
 637         }
 638
 639         if (status & ATH9K_INT_TX) {
 640                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 641                         ath_tx_edma_tasklet(sc);
 642                 else
 643                         ath_tx_tasklet(sc);
 644         }
 645
 646         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 647                 /*
 648                  * TSF sync does not look correct; remain awake to sync with
 649                  * the next Beacon.
 650                  */
 651                 ath_print(common, ATH_DBG_PS,
 652                           "TSFOOR - Sync with next Beacon\n");
 653                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
 654         }
 655
 656         if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
 657                 if (status & ATH9K_INT_GENTIMER)
 658                         ath_gen_timer_isr(sc->sc_ah);
 659
 660         /* re-enable hardware interrupt */
 661         ath9k_hw_set_interrupts(ah, ah->imask);
 662         ath9k_ps_restore(sc);
 663 }
 664
 665 irqreturn_t ath_isr(int irq, void *dev)
 666 {
 667 #define SCHED_INTR (                            \
 668                 ATH9K_INT_FATAL |               \
 669                 ATH9K_INT_RXORN |               \
 670                 ATH9K_INT_RXEOL |               \
 671                 ATH9K_INT_RX |                  \
 672                 ATH9K_INT_RXLP |                \
 673                 ATH9K_INT_RXHP |                \
 674                 ATH9K_INT_TX |                  \
 675                 ATH9K_INT_BMISS |               \
 676                 ATH9K_INT_CST |                 \
 677                 ATH9K_INT_TSFOOR |              \
 678                 ATH9K_INT_GENTIMER)
 679
 680         struct ath_softc *sc = dev;
 681         struct ath_hw *ah = sc->sc_ah;
 682         struct ath_common *common = ath9k_hw_common(ah);
 683         enum ath9k_int status;
 684         bool sched = false;
 685
 686         /*
 687          * The hardware is not ready/present, don't
 688          * touch anything. Note this can happen early
 689          * on if the IRQ is shared.
 690          */
 691         if (sc->sc_flags & SC_OP_INVALID)
 692                 return IRQ_NONE;
 693
 694
 695         /* shared irq, not for us */
 696
 697         if (!ath9k_hw_intrpend(ah))
 698                 return IRQ_NONE;
 699
 700         /*
 701          * Figure out the reason(s) for the interrupt.  Note
 702          * that the hal returns a pseudo-ISR that may include
 703          * bits we haven't explicitly enabled so we mask the
 704          * value to insure we only process bits we requested.
 705          */
 706         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
 707         status &= ah->imask;    /* discard unasked-for bits */
 708
 709         /*
 710          * If there are no status bits set, then this interrupt was not
 711          * for me (should have been caught above).
 712          */
 713         if (!status)
 714                 return IRQ_NONE;
 715
 716         /* Cache the status */
 717         sc->intrstatus = status;
 718
 719         if (status & SCHED_INTR)
 720                 sched = true;
 721
 722         /*
 723          * If a FATAL or RXORN interrupt is received, we have to reset the
 724          * chip immediately.
 725          */
 726         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
 727             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
 728                 goto chip_reset;
 729
 730         if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 731             (status & ATH9K_INT_BB_WATCHDOG)) {
 732
 733                 spin_lock(&common->cc_lock);
 734                 ath_hw_cycle_counters_update(common);
 735                 ar9003_hw_bb_watchdog_dbg_info(ah);
 736                 spin_unlock(&common->cc_lock);
 737
 738                 goto chip_reset;
 739         }
 740
 741         if (status & ATH9K_INT_SWBA)
 742                 tasklet_schedule(&sc->bcon_tasklet);
 743
 744         if (status & ATH9K_INT_TXURN)
 745                 ath9k_hw_updatetxtriglevel(ah, true);
 746
 747         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
 748                 if (status & ATH9K_INT_RXEOL) {
 749                         ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 750                         ath9k_hw_set_interrupts(ah, ah->imask);
 751                 }
 752         }
 753
 754         if (status & ATH9K_INT_MIB) {
 755                 /*
 756                  * Disable interrupts until we service the MIB
 757                  * interrupt; otherwise it will continue to
 758                  * fire.
 759                  */
 760                 ath9k_hw_set_interrupts(ah, 0);
 761                 /*
 762                  * Let the hal handle the event. We assume
 763                  * it will clear whatever condition caused
 764                  * the interrupt.
 765                  */
 766                 spin_lock(&common->cc_lock);
 767                 ath9k_hw_proc_mib_event(ah);
 768                 spin_unlock(&common->cc_lock);
 769                 ath9k_hw_set_interrupts(ah, ah->imask);
 770         }
 771
 772         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 773                 if (status & ATH9K_INT_TIM_TIMER) {
 774                         /* Clear RxAbort bit so that we can
 775                          * receive frames */
 776                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
 777                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 778                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
 779                 }
 780
 781 chip_reset:
 782
 783         ath_debug_stat_interrupt(sc, status);
 784
 785         if (sched) {
 786                 /* turn off every interrupt except SWBA */
 787                 ath9k_hw_set_interrupts(ah, (ah->imask & ATH9K_INT_SWBA));
 788                 tasklet_schedule(&sc->intr_tq);
 789         }
 790
 791         return IRQ_HANDLED;
 792
 793 #undef SCHED_INTR
 794 }
 795
 796 static u32 ath_get_extchanmode(struct ath_softc *sc,
 797                                struct ieee80211_channel *chan,
 798                                enum nl80211_channel_type channel_type)
 799 {
 800         u32 chanmode = 0;
 801
 802         switch (chan->band) {
 803         case IEEE80211_BAND_2GHZ:
 804                 switch(channel_type) {
 805                 case NL80211_CHAN_NO_HT:
 806                 case NL80211_CHAN_HT20:
 807                         chanmode = CHANNEL_G_HT20;
 808                         break;
 809                 case NL80211_CHAN_HT40PLUS:
 810                         chanmode = CHANNEL_G_HT40PLUS;
 811                         break;
 812                 case NL80211_CHAN_HT40MINUS:
 813                         chanmode = CHANNEL_G_HT40MINUS;
 814                         break;
 815                 }
 816                 break;
 817         case IEEE80211_BAND_5GHZ:
 818                 switch(channel_type) {
 819                 case NL80211_CHAN_NO_HT:
 820                 case NL80211_CHAN_HT20:
 821                         chanmode = CHANNEL_A_HT20;
 822                         break;
 823                 case NL80211_CHAN_HT40PLUS:
 824                         chanmode = CHANNEL_A_HT40PLUS;
 825                         break;
 826                 case NL80211_CHAN_HT40MINUS:
 827                         chanmode = CHANNEL_A_HT40MINUS;
 828                         break;
 829                 }
 830                 break;
 831         default:
 832                 break;
 833         }
 834
 835         return chanmode;
 836 }
 837
 838 static void ath9k_bss_assoc_info(struct ath_softc *sc,
 839                                  struct ieee80211_vif *vif,
 840                                  struct ieee80211_bss_conf *bss_conf)
 841 {
 842         struct ath_hw *ah = sc->sc_ah;
 843         struct ath_common *common = ath9k_hw_common(ah);
 844
 845         if (bss_conf->assoc) {
 846                 ath_print(common, ATH_DBG_CONFIG,
 847                           "Bss Info ASSOC %d, bssid: %pM\n",
 848                            bss_conf->aid, common->curbssid);
 849
 850                 /* New association, store aid */
 851                 common->curaid = bss_conf->aid;
 852                 ath9k_hw_write_associd(ah);
 853
 854                 /*
 855                  * Request a re-configuration of Beacon related timers
 856                  * on the receipt of the first Beacon frame (i.e.,
 857                  * after time sync with the AP).
 858                  */
 859                 sc->ps_flags |= PS_BEACON_SYNC;
 860
 861                 /* Configure the beacon */
 862                 ath_beacon_config(sc, vif);
 863
 864                 /* Reset rssi stats */
 865                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
 866
 867                 sc->sc_flags |= SC_OP_ANI_RUN;
 868                 ath_start_ani(common);
 869         } else {
 870                 ath_print(common, ATH_DBG_CONFIG, "Bss Info DISASSOC\n");
 871                 common->curaid = 0;
 872                 /* Stop ANI */
 873                 sc->sc_flags &= ~SC_OP_ANI_RUN;
 874                 del_timer_sync(&common->ani.timer);
 875         }
 876 }
 877
 878 void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
 879 {
 880         struct ath_hw *ah = sc->sc_ah;
 881         struct ath_common *common = ath9k_hw_common(ah);
 882         struct ieee80211_channel *channel = hw->conf.channel;
 883         int r;
 884
 885         ath9k_ps_wakeup(sc);
 886         ath9k_hw_configpcipowersave(ah, 0, 0);
 887
 888         if (!ah->curchan)
 889                 ah->curchan = ath_get_curchannel(sc, sc->hw);
 890
 891         spin_lock_bh(&sc->rx.pcu_lock);
 892         spin_lock_bh(&sc->sc_resetlock);
 893         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 894         if (r) {
 895                 ath_print(common, ATH_DBG_FATAL,
 896                           "Unable to reset channel (%u MHz), "
 897                           "reset status %d\n",
 898                           channel->center_freq, r);
 899         }
 900         spin_unlock_bh(&sc->sc_resetlock);
 901
 902         ath_update_txpow(sc);
 903         if (ath_startrecv(sc) != 0) {
 904                 ath_print(common, ATH_DBG_FATAL,
 905                           "Unable to restart recv logic\n");
 906                 spin_unlock_bh(&sc->rx.pcu_lock);
 907                 return;
 908         }
 909         spin_unlock_bh(&sc->rx.pcu_lock);
 910
 911         if (sc->sc_flags & SC_OP_BEACONS)
 912                 ath_beacon_config(sc, NULL);    /* restart beacons */
 913
 914         /* Re-Enable  interrupts */
 915         ath9k_hw_set_interrupts(ah, ah->imask);
 916
 917         /* Enable LED */
 918         ath9k_hw_cfg_output(ah, ah->led_pin,
 919                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 920         ath9k_hw_set_gpio(ah, ah->led_pin, 0);
 921
 922         ieee80211_wake_queues(hw);
 923         ath9k_ps_restore(sc);
 924 }
 925
 926 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
 927 {
 928         struct ath_hw *ah = sc->sc_ah;
 929         struct ieee80211_channel *channel = hw->conf.channel;
 930         int r;
 931
 932         ath9k_ps_wakeup(sc);
 933         ieee80211_stop_queues(hw);
 934
 935         /*
 936          * Keep the LED on when the radio is disabled
 937          * during idle unassociated state.
 938          */
 939         if (!sc->ps_idle) {
 940                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
 941                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
 942         }
 943
 944         /* Disable interrupts */
 945         ath9k_hw_set_interrupts(ah, 0);
 946
 947         ath_drain_all_txq(sc, false);   /* clear pending tx frames */
 948
 949         spin_lock_bh(&sc->rx.pcu_lock);
 950
 951         ath_stoprecv(sc);               /* turn off frame recv */
 952         ath_flushrecv(sc);              /* flush recv queue */
 953
 954         if (!ah->curchan)
 955                 ah->curchan = ath_get_curchannel(sc, hw);
 956
 957         spin_lock_bh(&sc->sc_resetlock);
 958         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 959         if (r) {
 960                 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
 961                           "Unable to reset channel (%u MHz), "
 962                           "reset status %d\n",
 963                           channel->center_freq, r);
 964         }
 965         spin_unlock_bh(&sc->sc_resetlock);
 966
 967         ath9k_hw_phy_disable(ah);
 968
 969         spin_unlock_bh(&sc->rx.pcu_lock);
 970
 971         ath9k_hw_configpcipowersave(ah, 1, 1);
 972         ath9k_ps_restore(sc);
 973         ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
 974 }
 975
 976 int ath_reset(struct ath_softc *sc, bool retry_tx)
 977 {
 978         struct ath_hw *ah = sc->sc_ah;
 979         struct ath_common *common = ath9k_hw_common(ah);
 980         struct ieee80211_hw *hw = sc->hw;
 981         int r;
 982
 983         /* Stop ANI */
 984         del_timer_sync(&common->ani.timer);
 985
 986         ieee80211_stop_queues(hw);
 987
 988         ath9k_hw_set_interrupts(ah, 0);
 989         ath_drain_all_txq(sc, retry_tx);
 990
 991         spin_lock_bh(&sc->rx.pcu_lock);
 992
 993         ath_stoprecv(sc);
 994         ath_flushrecv(sc);
 995
 996         spin_lock_bh(&sc->sc_resetlock);
 997         r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
 998         if (r)
 999                 ath_print(common, ATH_DBG_FATAL,
1000                           "Unable to reset hardware; reset status %d\n", r);
1001         spin_unlock_bh(&sc->sc_resetlock);
1002
1003         if (ath_startrecv(sc) != 0)
1004                 ath_print(common, ATH_DBG_FATAL,
1005                           "Unable to start recv logic\n");
1006
1007         spin_unlock_bh(&sc->rx.pcu_lock);
1008
1009         /*
1010          * We may be doing a reset in response to a request
1011          * that changes the channel so update any state that
1012          * might change as a result.
1013          */
1014         ath_update_txpow(sc);
1015
1016         if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
1017                 ath_beacon_config(sc, NULL);    /* restart beacons */
1018
1019         ath9k_hw_set_interrupts(ah, ah->imask);
1020
1021         if (retry_tx) {
1022                 int i;
1023                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1024                         if (ATH_TXQ_SETUP(sc, i)) {
1025                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
1026                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
1027                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
1028                         }
1029                 }
1030         }
1031
1032         ieee80211_wake_queues(hw);
1033
1034         /* Start ANI */
1035         ath_start_ani(common);
1036
1037         return r;
1038 }
1039
1040 static int ath_get_hal_qnum(u16 queue, struct ath_softc *sc)
1041 {
1042         int qnum;
1043
1044         switch (queue) {
1045         case 0:
1046                 qnum = sc->tx.hwq_map[WME_AC_VO];
1047                 break;
1048         case 1:
1049                 qnum = sc->tx.hwq_map[WME_AC_VI];
1050                 break;
1051         case 2:
1052                 qnum = sc->tx.hwq_map[WME_AC_BE];
1053                 break;
1054         case 3:
1055                 qnum = sc->tx.hwq_map[WME_AC_BK];
1056                 break;
1057         default:
1058                 qnum = sc->tx.hwq_map[WME_AC_BE];
1059                 break;
1060         }
1061
1062         return qnum;
1063 }
1064
1065 int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc)
1066 {
1067         int qnum;
1068
1069         switch (queue) {
1070         case WME_AC_VO:
1071                 qnum = 0;
1072                 break;
1073         case WME_AC_VI:
1074                 qnum = 1;
1075                 break;
1076         case WME_AC_BE:
1077                 qnum = 2;
1078                 break;
1079         case WME_AC_BK:
1080                 qnum = 3;
1081                 break;
1082         default:
1083                 qnum = -1;
1084                 break;
1085         }
1086
1087         return qnum;
1088 }
1089
1090 /* XXX: Remove me once we don't depend on ath9k_channel for all
1091  * this redundant data */
1092 void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
1093                            struct ath9k_channel *ichan)
1094 {
1095         struct ieee80211_channel *chan = hw->conf.channel;
1096         struct ieee80211_conf *conf = &hw->conf;
1097
1098         ichan->channel = chan->center_freq;
1099         ichan->chan = chan;
1100
1101         if (chan->band == IEEE80211_BAND_2GHZ) {
1102                 ichan->chanmode = CHANNEL_G;
1103                 ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G;
1104         } else {
1105                 ichan->chanmode = CHANNEL_A;
1106                 ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
1107         }
1108
1109         if (conf_is_ht(conf))
1110                 ichan->chanmode = ath_get_extchanmode(sc, chan,
1111                                             conf->channel_type);
1112 }
1113
1114 /**********************/
1115 /* mac80211 callbacks */
1116 /**********************/
1117
1118 static int ath9k_start(struct ieee80211_hw *hw)
1119 {
1120         struct ath_wiphy *aphy = hw->priv;
1121         struct ath_softc *sc = aphy->sc;
1122         struct ath_hw *ah = sc->sc_ah;
1123         struct ath_common *common = ath9k_hw_common(ah);
1124         struct ieee80211_channel *curchan = hw->conf.channel;
1125         struct ath9k_channel *init_channel;
1126         int r;
1127
1128         ath_print(common, ATH_DBG_CONFIG,
1129                   "Starting driver with initial channel: %d MHz\n",
1130                   curchan->center_freq);
1131
1132         mutex_lock(&sc->mutex);
1133
1134         if (ath9k_wiphy_started(sc)) {
1135                 if (sc->chan_idx == curchan->hw_value) {
1136                         /*
1137                          * Already on the operational channel, the new wiphy
1138                          * can be marked active.
1139                          */
1140                         aphy->state = ATH_WIPHY_ACTIVE;
1141                         ieee80211_wake_queues(hw);
1142                 } else {
1143                         /*
1144                          * Another wiphy is on another channel, start the new
1145                          * wiphy in paused state.
1146                          */
1147                         aphy->state = ATH_WIPHY_PAUSED;
1148                         ieee80211_stop_queues(hw);
1149                 }
1150                 mutex_unlock(&sc->mutex);
1151                 return 0;
1152         }
1153         aphy->state = ATH_WIPHY_ACTIVE;
1154
1155         /* setup initial channel */
1156
1157         sc->chan_idx = curchan->hw_value;
1158
1159         init_channel = ath_get_curchannel(sc, hw);
1160
1161         /* Reset SERDES registers */
1162         ath9k_hw_configpcipowersave(ah, 0, 0);
1163
1164         /*
1165          * The basic interface to setting the hardware in a good
1166          * state is ``reset''.  On return the hardware is known to
1167          * be powered up and with interrupts disabled.  This must
1168          * be followed by initialization of the appropriate bits
1169          * and then setup of the interrupt mask.
1170          */
1171         spin_lock_bh(&sc->rx.pcu_lock);
1172         spin_lock_bh(&sc->sc_resetlock);
1173         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1174         if (r) {
1175                 ath_print(common, ATH_DBG_FATAL,
1176                           "Unable to reset hardware; reset status %d "
1177                           "(freq %u MHz)\n", r,
1178                           curchan->center_freq);
1179                 spin_unlock_bh(&sc->sc_resetlock);
1180                 spin_unlock_bh(&sc->rx.pcu_lock);
1181                 goto mutex_unlock;
1182         }
1183         spin_unlock_bh(&sc->sc_resetlock);
1184
1185         /*
1186          * This is needed only to setup initial state
1187          * but it's best done after a reset.
1188          */
1189         ath_update_txpow(sc);
1190
1191         /*
1192          * Setup the hardware after reset:
1193          * The receive engine is set going.
1194          * Frame transmit is handled entirely
1195          * in the frame output path; there's nothing to do
1196          * here except setup the interrupt mask.
1197          */
1198         if (ath_startrecv(sc) != 0) {
1199                 ath_print(common, ATH_DBG_FATAL,
1200                           "Unable to start recv logic\n");
1201                 r = -EIO;
1202                 spin_unlock_bh(&sc->rx.pcu_lock);
1203                 goto mutex_unlock;
1204         }
1205         spin_unlock_bh(&sc->rx.pcu_lock);
1206
1207         /* Setup our intr mask. */
1208         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1209                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1210                     ATH9K_INT_GLOBAL;
1211
1212         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1213                 ah->imask |= ATH9K_INT_RXHP |
1214                              ATH9K_INT_RXLP |
1215                              ATH9K_INT_BB_WATCHDOG;
1216         else
1217                 ah->imask |= ATH9K_INT_RX;
1218
1219         ah->imask |= ATH9K_INT_GTT;
1220
1221         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1222                 ah->imask |= ATH9K_INT_CST;
1223
1224         sc->sc_flags &= ~SC_OP_INVALID;
1225         sc->sc_ah->is_monitoring = false;
1226
1227         /* Disable BMISS interrupt when we're not associated */
1228         ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1229         ath9k_hw_set_interrupts(ah, ah->imask);
1230
1231         ieee80211_wake_queues(hw);
1232
1233         ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
1234
1235         if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1236             !ah->btcoex_hw.enabled) {
1237                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1238                                            AR_STOMP_LOW_WLAN_WGHT);
1239                 ath9k_hw_btcoex_enable(ah);
1240
1241                 if (common->bus_ops->bt_coex_prep)
1242                         common->bus_ops->bt_coex_prep(common);
1243                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1244                         ath9k_btcoex_timer_resume(sc);
1245         }
1246
1247         pm_qos_update_request(&sc->pm_qos_req, 55);
1248
1249 mutex_unlock:
1250         mutex_unlock(&sc->mutex);
1251
1252         return r;
1253 }
1254
1255 static int ath9k_tx(struct ieee80211_hw *hw,
1256                     struct sk_buff *skb)
1257 {
1258         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1259         struct ath_wiphy *aphy = hw->priv;
1260         struct ath_softc *sc = aphy->sc;
1261         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1262         struct ath_tx_control txctl;
1263         int padpos, padsize;
1264         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1265         int qnum;
1266
1267         if (aphy->state != ATH_WIPHY_ACTIVE && aphy->state != ATH_WIPHY_SCAN) {
1268                 ath_print(common, ATH_DBG_XMIT,
1269                           "ath9k: %s: TX in unexpected wiphy state "
1270                           "%d\n", wiphy_name(hw->wiphy), aphy->state);
1271                 goto exit;
1272         }
1273
1274         if (sc->ps_enabled) {
1275                 /*
1276                  * mac80211 does not set PM field for normal data frames, so we
1277                  * need to update that based on the current PS mode.
1278                  */
1279                 if (ieee80211_is_data(hdr->frame_control) &&
1280                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1281                     !ieee80211_has_pm(hdr->frame_control)) {
1282                         ath_print(common, ATH_DBG_PS, "Add PM=1 for a TX frame "
1283                                   "while in PS mode\n");
1284                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1285                 }
1286         }
1287
1288         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1289                 /*
1290                  * We are using PS-Poll and mac80211 can request TX while in
1291                  * power save mode. Need to wake up hardware for the TX to be
1292                  * completed and if needed, also for RX of buffered frames.
1293                  */
1294                 ath9k_ps_wakeup(sc);
1295                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1296                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1297                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1298                         ath_print(common, ATH_DBG_PS,
1299                                   "Sending PS-Poll to pick a buffered frame\n");
1300                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1301                 } else {
1302                         ath_print(common, ATH_DBG_PS,
1303                                   "Wake up to complete TX\n");
1304                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1305                 }
1306                 /*
1307                  * The actual restore operation will happen only after
1308                  * the sc_flags bit is cleared. We are just dropping
1309                  * the ps_usecount here.
1310                  */
1311                 ath9k_ps_restore(sc);
1312         }
1313
1314         memset(&txctl, 0, sizeof(struct ath_tx_control));
1315
1316         /*
1317          * As a temporary workaround, assign seq# here; this will likely need
1318          * to be cleaned up to work better with Beacon transmission and virtual
1319          * BSSes.
1320          */
1321         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1322                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
1323                         sc->tx.seq_no += 0x10;
1324                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1325                 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
1326         }
1327
1328         /* Add the padding after the header if this is not already done */
1329         padpos = ath9k_cmn_padpos(hdr->frame_control);
1330         padsize = padpos & 3;
1331         if (padsize && skb->len>padpos) {
1332                 if (skb_headroom(skb) < padsize)
1333                         return -1;
1334                 skb_push(skb, padsize);
1335                 memmove(skb->data, skb->data + padsize, padpos);
1336         }
1337
1338         qnum = ath_get_hal_qnum(skb_get_queue_mapping(skb), sc);
1339         txctl.txq = &sc->tx.txq[qnum];
1340
1341         ath_print(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1342
1343         if (ath_tx_start(hw, skb, &txctl) != 0) {
1344                 ath_print(common, ATH_DBG_XMIT, "TX failed\n");
1345                 goto exit;
1346         }
1347
1348         return 0;
1349 exit:
1350         dev_kfree_skb_any(skb);
1351         return 0;
1352 }
1353
1354 static void ath9k_stop(struct ieee80211_hw *hw)
1355 {
1356         struct ath_wiphy *aphy = hw->priv;
1357         struct ath_softc *sc = aphy->sc;
1358         struct ath_hw *ah = sc->sc_ah;
1359         struct ath_common *common = ath9k_hw_common(ah);
1360         int i;
1361
1362         mutex_lock(&sc->mutex);
1363
1364         aphy->state = ATH_WIPHY_INACTIVE;
1365
1366         if (led_blink)
1367                 cancel_delayed_work_sync(&sc->ath_led_blink_work);
1368
1369         cancel_delayed_work_sync(&sc->tx_complete_work);
1370         cancel_work_sync(&sc->paprd_work);
1371         cancel_work_sync(&sc->hw_check_work);
1372
1373         for (i = 0; i < sc->num_sec_wiphy; i++) {
1374                 if (sc->sec_wiphy[i])
1375                         break;
1376         }
1377
1378         if (i == sc->num_sec_wiphy) {
1379                 cancel_delayed_work_sync(&sc->wiphy_work);
1380                 cancel_work_sync(&sc->chan_work);
1381         }
1382
1383         if (sc->sc_flags & SC_OP_INVALID) {
1384                 ath_print(common, ATH_DBG_ANY, "Device not present\n");
1385                 mutex_unlock(&sc->mutex);
1386                 return;
1387         }
1388
1389         if (ath9k_wiphy_started(sc)) {
1390                 mutex_unlock(&sc->mutex);
1391                 return; /* another wiphy still in use */
1392         }
1393
1394         /* Ensure HW is awake when we try to shut it down. */
1395         ath9k_ps_wakeup(sc);
1396
1397         if (ah->btcoex_hw.enabled) {
1398                 ath9k_hw_btcoex_disable(ah);
1399                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1400                         ath9k_btcoex_timer_pause(sc);
1401         }
1402
1403         /* make sure h/w will not generate any interrupt
1404          * before setting the invalid flag. */
1405         ath9k_hw_set_interrupts(ah, 0);
1406
1407         spin_lock_bh(&sc->rx.pcu_lock);
1408         if (!(sc->sc_flags & SC_OP_INVALID)) {
1409                 ath_drain_all_txq(sc, false);
1410                 ath_stoprecv(sc);
1411                 ath9k_hw_phy_disable(ah);
1412         } else
1413                 sc->rx.rxlink = NULL;
1414         spin_unlock_bh(&sc->rx.pcu_lock);
1415
1416         /* disable HAL and put h/w to sleep */
1417         ath9k_hw_disable(ah);
1418         ath9k_hw_configpcipowersave(ah, 1, 1);
1419         ath9k_ps_restore(sc);
1420
1421         /* Finally, put the chip in FULL SLEEP mode */
1422         ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
1423
1424         sc->sc_flags |= SC_OP_INVALID;
1425
1426         pm_qos_update_request(&sc->pm_qos_req, PM_QOS_DEFAULT_VALUE);
1427
1428         mutex_unlock(&sc->mutex);
1429
1430         ath_print(common, ATH_DBG_CONFIG, "Driver halt\n");
1431 }
1432
1433 static int ath9k_add_interface(struct ieee80211_hw *hw,
1434                                struct ieee80211_vif *vif)
1435 {
1436         struct ath_wiphy *aphy = hw->priv;
1437         struct ath_softc *sc = aphy->sc;
1438         struct ath_hw *ah = sc->sc_ah;
1439         struct ath_common *common = ath9k_hw_common(ah);
1440         struct ath_vif *avp = (void *)vif->drv_priv;
1441         enum nl80211_iftype ic_opmode = NL80211_IFTYPE_UNSPECIFIED;
1442         int ret = 0;
1443
1444         mutex_lock(&sc->mutex);
1445
1446         switch (vif->type) {
1447         case NL80211_IFTYPE_STATION:
1448                 ic_opmode = NL80211_IFTYPE_STATION;
1449                 break;
1450         case NL80211_IFTYPE_WDS:
1451                 ic_opmode = NL80211_IFTYPE_WDS;
1452                 break;
1453         case NL80211_IFTYPE_ADHOC:
1454         case NL80211_IFTYPE_AP:
1455         case NL80211_IFTYPE_MESH_POINT:
1456                 if (sc->nbcnvifs >= ATH_BCBUF) {
1457                         ret = -ENOBUFS;
1458                         goto out;
1459                 }
1460                 ic_opmode = vif->type;
1461                 break;
1462         default:
1463                 ath_print(common, ATH_DBG_FATAL,
1464                         "Interface type %d not yet supported\n", vif->type);
1465                 ret = -EOPNOTSUPP;
1466                 goto out;
1467         }
1468
1469         ath_print(common, ATH_DBG_CONFIG,
1470                   "Attach a VIF of type: %d\n", ic_opmode);
1471
1472         /* Set the VIF opmode */
1473         avp->av_opmode = ic_opmode;
1474         avp->av_bslot = -1;
1475
1476         sc->nvifs++;
1477
1478         ath9k_set_bssid_mask(hw, vif);
1479
1480         if (sc->nvifs > 1)
1481                 goto out; /* skip global settings for secondary vif */
1482
1483         if (ic_opmode == NL80211_IFTYPE_AP) {
1484                 ath9k_hw_set_tsfadjust(ah, 1);
1485                 sc->sc_flags |= SC_OP_TSF_RESET;
1486         }
1487
1488         /* Set the device opmode */
1489         ah->opmode = ic_opmode;
1490
1491         /*
1492          * Enable MIB interrupts when there are hardware phy counters.
1493          * Note we only do this (at the moment) for station mode.
1494          */
1495         if ((vif->type == NL80211_IFTYPE_STATION) ||
1496             (vif->type == NL80211_IFTYPE_ADHOC) ||
1497             (vif->type == NL80211_IFTYPE_MESH_POINT)) {
1498                 if (ah->config.enable_ani)
1499                         ah->imask |= ATH9K_INT_MIB;
1500                 ah->imask |= ATH9K_INT_TSFOOR;
1501         }
1502
1503         ath9k_hw_set_interrupts(ah, ah->imask);
1504
1505         if (vif->type == NL80211_IFTYPE_AP    ||
1506             vif->type == NL80211_IFTYPE_ADHOC) {
1507                 sc->sc_flags |= SC_OP_ANI_RUN;
1508                 ath_start_ani(common);
1509         }
1510
1511 out:
1512         mutex_unlock(&sc->mutex);
1513         return ret;
1514 }
1515
1516 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1517                                    struct ieee80211_vif *vif)
1518 {
1519         struct ath_wiphy *aphy = hw->priv;
1520         struct ath_softc *sc = aphy->sc;
1521         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1522         struct ath_vif *avp = (void *)vif->drv_priv;
1523
1524         ath_print(common, ATH_DBG_CONFIG, "Detach Interface\n");
1525
1526         mutex_lock(&sc->mutex);
1527
1528         /* Stop ANI */
1529         sc->sc_flags &= ~SC_OP_ANI_RUN;
1530         del_timer_sync(&common->ani.timer);
1531
1532         /* Reclaim beacon resources */
1533         if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||
1534             (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||
1535             (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {
1536                 /* Disable SWBA interrupt */
1537                 sc->sc_ah->imask &= ~ATH9K_INT_SWBA;
1538                 ath9k_ps_wakeup(sc);
1539                 ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
1540                 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1541                 ath9k_ps_restore(sc);
1542                 tasklet_kill(&sc->bcon_tasklet);
1543         }
1544
1545         ath_beacon_return(sc, avp);
1546         sc->sc_flags &= ~SC_OP_BEACONS;
1547
1548         if (sc->nbcnvifs) {
1549                 /* Re-enable SWBA interrupt */
1550                 sc->sc_ah->imask |= ATH9K_INT_SWBA;
1551                 ath9k_ps_wakeup(sc);
1552                 ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
1553                 ath9k_ps_restore(sc);
1554         }
1555
1556         sc->nvifs--;
1557
1558         mutex_unlock(&sc->mutex);
1559 }
1560
1561 static void ath9k_enable_ps(struct ath_softc *sc)
1562 {
1563         struct ath_hw *ah = sc->sc_ah;
1564
1565         sc->ps_enabled = true;
1566         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1567                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1568                         ah->imask |= ATH9K_INT_TIM_TIMER;
1569                         ath9k_hw_set_interrupts(ah, ah->imask);
1570                 }
1571                 ath9k_hw_setrxabort(ah, 1);
1572         }
1573 }
1574
1575 static void ath9k_disable_ps(struct ath_softc *sc)
1576 {
1577         struct ath_hw *ah = sc->sc_ah;
1578
1579         sc->ps_enabled = false;
1580         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1581         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1582                 ath9k_hw_setrxabort(ah, 0);
1583                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1584                                   PS_WAIT_FOR_CAB |
1585                                   PS_WAIT_FOR_PSPOLL_DATA |
1586                                   PS_WAIT_FOR_TX_ACK);
1587                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1588                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1589                         ath9k_hw_set_interrupts(ah, ah->imask);
1590                 }
1591         }
1592
1593 }
1594
1595 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1596 {
1597         struct ath_wiphy *aphy = hw->priv;
1598         struct ath_softc *sc = aphy->sc;
1599         struct ath_hw *ah = sc->sc_ah;
1600         struct ath_common *common = ath9k_hw_common(ah);
1601         struct ieee80211_conf *conf = &hw->conf;
1602         bool disable_radio;
1603
1604         mutex_lock(&sc->mutex);
1605
1606         /*
1607          * Leave this as the first check because we need to turn on the
1608          * radio if it was disabled before prior to processing the rest
1609          * of the changes. Likewise we must only disable the radio towards
1610          * the end.
1611          */
1612         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1613                 bool enable_radio;
1614                 bool all_wiphys_idle;
1615                 bool idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1616
1617                 spin_lock_bh(&sc->wiphy_lock);
1618                 all_wiphys_idle =  ath9k_all_wiphys_idle(sc);
1619                 ath9k_set_wiphy_idle(aphy, idle);
1620
1621                 enable_radio = (!idle && all_wiphys_idle);
1622
1623                 /*
1624                  * After we unlock here its possible another wiphy
1625                  * can be re-renabled so to account for that we will
1626                  * only disable the radio toward the end of this routine
1627                  * if by then all wiphys are still idle.
1628                  */
1629                 spin_unlock_bh(&sc->wiphy_lock);
1630
1631                 if (enable_radio) {
1632                         sc->ps_idle = false;
1633                         ath_radio_enable(sc, hw);
1634                         ath_print(common, ATH_DBG_CONFIG,
1635                                   "not-idle: enabling radio\n");
1636                 }
1637         }
1638
1639         /*
1640          * We just prepare to enable PS. We have to wait until our AP has
1641          * ACK'd our null data frame to disable RX otherwise we'll ignore
1642          * those ACKs and end up retransmitting the same null data frames.
1643          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1644          */
1645         if (changed & IEEE80211_CONF_CHANGE_PS) {
1646                 unsigned long flags;
1647                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1648                 if (conf->flags & IEEE80211_CONF_PS)
1649                         ath9k_enable_ps(sc);
1650                 else
1651                         ath9k_disable_ps(sc);
1652                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1653         }
1654
1655         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1656                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1657                         ath_print(common, ATH_DBG_CONFIG,
1658                                   "Monitor mode is enabled\n");
1659                         sc->sc_ah->is_monitoring = true;
1660                 } else {
1661                         ath_print(common, ATH_DBG_CONFIG,
1662                                   "Monitor mode is disabled\n");
1663                         sc->sc_ah->is_monitoring = false;
1664                 }
1665         }
1666
1667         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1668                 struct ieee80211_channel *curchan = hw->conf.channel;
1669                 int pos = curchan->hw_value;
1670                 int old_pos = -1;
1671                 unsigned long flags;
1672
1673                 if (ah->curchan)
1674                         old_pos = ah->curchan - &ah->channels[0];
1675
1676                 aphy->chan_idx = pos;
1677                 aphy->chan_is_ht = conf_is_ht(conf);
1678                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1679                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1680                 else
1681                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1682
1683                 if (aphy->state == ATH_WIPHY_SCAN ||
1684                     aphy->state == ATH_WIPHY_ACTIVE)
1685                         ath9k_wiphy_pause_all_forced(sc, aphy);
1686                 else {
1687                         /*
1688                          * Do not change operational channel based on a paused
1689                          * wiphy changes.
1690                          */
1691                         goto skip_chan_change;
1692                 }
1693
1694                 ath_print(common, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
1695                           curchan->center_freq);
1696
1697                 /* XXX: remove me eventualy */
1698                 ath9k_update_ichannel(sc, hw, &sc->sc_ah->channels[pos]);
1699
1700                 ath_update_chainmask(sc, conf_is_ht(conf));
1701
1702                 /* update survey stats for the old channel before switching */
1703                 spin_lock_irqsave(&common->cc_lock, flags);
1704                 ath_update_survey_stats(sc);
1705                 spin_unlock_irqrestore(&common->cc_lock, flags);
1706
1707                 /*
1708                  * If the operating channel changes, change the survey in-use flags
1709                  * along with it.
1710                  * Reset the survey data for the new channel, unless we're switching
1711                  * back to the operating channel from an off-channel operation.
1712                  */
1713                 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1714                     sc->cur_survey != &sc->survey[pos]) {
1715
1716                         if (sc->cur_survey)
1717                                 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1718
1719                         sc->cur_survey = &sc->survey[pos];
1720
1721                         memset(sc->cur_survey, 0, sizeof(struct survey_info));
1722                         sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1723                 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1724                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1725                 }
1726
1727                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1728                         ath_print(common, ATH_DBG_FATAL,
1729                                   "Unable to set channel\n");
1730                         mutex_unlock(&sc->mutex);
1731                         return -EINVAL;
1732                 }
1733
1734                 /*
1735                  * The most recent snapshot of channel->noisefloor for the old
1736                  * channel is only available after the hardware reset. Copy it to
1737                  * the survey stats now.
1738                  */
1739                 if (old_pos >= 0)
1740                         ath_update_survey_nf(sc, old_pos);
1741         }
1742
1743 skip_chan_change:
1744         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1745                 sc->config.txpowlimit = 2 * conf->power_level;
1746                 ath_update_txpow(sc);
1747         }
1748
1749         spin_lock_bh(&sc->wiphy_lock);
1750         disable_radio = ath9k_all_wiphys_idle(sc);
1751         spin_unlock_bh(&sc->wiphy_lock);
1752
1753         if (disable_radio) {
1754                 ath_print(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1755                 sc->ps_idle = true;
1756                 ath_radio_disable(sc, hw);
1757         }
1758
1759         mutex_unlock(&sc->mutex);
1760
1761         return 0;
1762 }
1763
1764 #define SUPPORTED_FILTERS                       \
1765         (FIF_PROMISC_IN_BSS |                   \
1766         FIF_ALLMULTI |                          \
1767         FIF_CONTROL |                           \
1768         FIF_PSPOLL |                            \
1769         FIF_OTHER_BSS |                         \
1770         FIF_BCN_PRBRESP_PROMISC |               \
1771         FIF_PROBE_REQ |                         \
1772         FIF_FCSFAIL)
1773
1774 /* FIXME: sc->sc_full_reset ? */
1775 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1776                                    unsigned int changed_flags,
1777                                    unsigned int *total_flags,
1778                                    u64 multicast)
1779 {
1780         struct ath_wiphy *aphy = hw->priv;
1781         struct ath_softc *sc = aphy->sc;
1782         u32 rfilt;
1783
1784         changed_flags &= SUPPORTED_FILTERS;
1785         *total_flags &= SUPPORTED_FILTERS;
1786
1787         sc->rx.rxfilter = *total_flags;
1788         ath9k_ps_wakeup(sc);
1789         rfilt = ath_calcrxfilter(sc);
1790         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1791         ath9k_ps_restore(sc);
1792
1793         ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1794                   "Set HW RX filter: 0x%x\n", rfilt);
1795 }
1796
1797 static int ath9k_sta_add(struct ieee80211_hw *hw,
1798                          struct ieee80211_vif *vif,
1799                          struct ieee80211_sta *sta)
1800 {
1801         struct ath_wiphy *aphy = hw->priv;
1802         struct ath_softc *sc = aphy->sc;
1803
1804         ath_node_attach(sc, sta);
1805
1806         return 0;
1807 }
1808
1809 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1810                             struct ieee80211_vif *vif,
1811                             struct ieee80211_sta *sta)
1812 {
1813         struct ath_wiphy *aphy = hw->priv;
1814         struct ath_softc *sc = aphy->sc;
1815
1816         ath_node_detach(sc, sta);
1817
1818         return 0;
1819 }
1820
1821 static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
1822                          const struct ieee80211_tx_queue_params *params)
1823 {
1824         struct ath_wiphy *aphy = hw->priv;
1825         struct ath_softc *sc = aphy->sc;
1826         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1827         struct ath9k_tx_queue_info qi;
1828         int ret = 0, qnum;
1829
1830         if (queue >= WME_NUM_AC)
1831                 return 0;
1832
1833         mutex_lock(&sc->mutex);
1834
1835         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1836
1837         qi.tqi_aifs = params->aifs;
1838         qi.tqi_cwmin = params->cw_min;
1839         qi.tqi_cwmax = params->cw_max;
1840         qi.tqi_burstTime = params->txop;
1841         qnum = ath_get_hal_qnum(queue, sc);
1842
1843         ath_print(common, ATH_DBG_CONFIG,
1844                   "Configure tx [queue/halq] [%d/%d],  "
1845                   "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1846                   queue, qnum, params->aifs, params->cw_min,
1847                   params->cw_max, params->txop);
1848
1849         ret = ath_txq_update(sc, qnum, &qi);
1850         if (ret)
1851                 ath_print(common, ATH_DBG_FATAL, "TXQ Update failed\n");
1852
1853         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1854                 if ((qnum == sc->tx.hwq_map[WME_AC_BE]) && !ret)
1855                         ath_beaconq_config(sc);
1856
1857         mutex_unlock(&sc->mutex);
1858
1859         return ret;
1860 }
1861
1862 static int ath9k_set_key(struct ieee80211_hw *hw,
1863                          enum set_key_cmd cmd,
1864                          struct ieee80211_vif *vif,
1865                          struct ieee80211_sta *sta,
1866                          struct ieee80211_key_conf *key)
1867 {
1868         struct ath_wiphy *aphy = hw->priv;
1869         struct ath_softc *sc = aphy->sc;
1870         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1871         int ret = 0;
1872
1873         if (modparam_nohwcrypt)
1874                 return -ENOSPC;
1875
1876         mutex_lock(&sc->mutex);
1877         ath9k_ps_wakeup(sc);
1878         ath_print(common, ATH_DBG_CONFIG, "Set HW Key\n");
1879
1880         switch (cmd) {
1881         case SET_KEY:
1882                 ret = ath_key_config(common, vif, sta, key);
1883                 if (ret >= 0) {
1884                         key->hw_key_idx = ret;
1885                         /* push IV and Michael MIC generation to stack */
1886                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1887                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1888                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1889                         if (sc->sc_ah->sw_mgmt_crypto &&
1890                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1891                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1892                         ret = 0;
1893                 }
1894                 break;
1895         case DISABLE_KEY:
1896                 ath_key_delete(common, key);
1897                 break;
1898         default:
1899                 ret = -EINVAL;
1900         }
1901
1902         ath9k_ps_restore(sc);
1903         mutex_unlock(&sc->mutex);
1904
1905         return ret;
1906 }
1907
1908 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1909                                    struct ieee80211_vif *vif,
1910                                    struct ieee80211_bss_conf *bss_conf,
1911                                    u32 changed)
1912 {
1913         struct ath_wiphy *aphy = hw->priv;
1914         struct ath_softc *sc = aphy->sc;
1915         struct ath_hw *ah = sc->sc_ah;
1916         struct ath_common *common = ath9k_hw_common(ah);
1917         struct ath_vif *avp = (void *)vif->drv_priv;
1918         int slottime;
1919         int error;
1920
1921         mutex_lock(&sc->mutex);
1922
1923         if (changed & BSS_CHANGED_BSSID) {
1924                 /* Set BSSID */
1925                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1926                 memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
1927                 common->curaid = 0;
1928                 ath9k_hw_write_associd(ah);
1929
1930                 /* Set aggregation protection mode parameters */
1931                 sc->config.ath_aggr_prot = 0;
1932
1933                 /* Only legacy IBSS for now */
1934                 if (vif->type == NL80211_IFTYPE_ADHOC)
1935                         ath_update_chainmask(sc, 0);
1936
1937                 ath_print(common, ATH_DBG_CONFIG,
1938                           "BSSID: %pM aid: 0x%x\n",
1939                           common->curbssid, common->curaid);
1940
1941                 /* need to reconfigure the beacon */
1942                 sc->sc_flags &= ~SC_OP_BEACONS ;
1943         }
1944
1945         /* Enable transmission of beacons (AP, IBSS, MESH) */
1946         if ((changed & BSS_CHANGED_BEACON) ||
1947             ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
1948                 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1949                 error = ath_beacon_alloc(aphy, vif);
1950                 if (!error)
1951                         ath_beacon_config(sc, vif);
1952         }
1953
1954         if (changed & BSS_CHANGED_ERP_SLOT) {
1955                 if (bss_conf->use_short_slot)
1956                         slottime = 9;
1957                 else
1958                         slottime = 20;
1959                 if (vif->type == NL80211_IFTYPE_AP) {
1960                         /*
1961                          * Defer update, so that connected stations can adjust
1962                          * their settings at the same time.
1963                          * See beacon.c for more details
1964                          */
1965                         sc->beacon.slottime = slottime;
1966                         sc->beacon.updateslot = UPDATE;
1967                 } else {
1968                         ah->slottime = slottime;
1969                         ath9k_hw_init_global_settings(ah);
1970                 }
1971         }
1972
1973         /* Disable transmission of beacons */
1974         if ((changed & BSS_CHANGED_BEACON_ENABLED) && !bss_conf->enable_beacon)
1975                 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1976
1977         if (changed & BSS_CHANGED_BEACON_INT) {
1978                 sc->beacon_interval = bss_conf->beacon_int;
1979                 /*
1980                  * In case of AP mode, the HW TSF has to be reset
1981                  * when the beacon interval changes.
1982                  */
1983                 if (vif->type == NL80211_IFTYPE_AP) {
1984                         sc->sc_flags |= SC_OP_TSF_RESET;
1985                         ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1986                         error = ath_beacon_alloc(aphy, vif);
1987                         if (!error)
1988                                 ath_beacon_config(sc, vif);
1989                 } else {
1990                         ath_beacon_config(sc, vif);
1991                 }
1992         }
1993
1994         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1995                 ath_print(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
1996                           bss_conf->use_short_preamble);
1997                 if (bss_conf->use_short_preamble)
1998                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
1999                 else
2000                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2001         }
2002
2003         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2004                 ath_print(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
2005                           bss_conf->use_cts_prot);
2006                 if (bss_conf->use_cts_prot &&
2007                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2008                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2009                 else
2010                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2011         }
2012
2013         if (changed & BSS_CHANGED_ASSOC) {
2014                 ath_print(common, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
2015                         bss_conf->assoc);
2016                 ath9k_bss_assoc_info(sc, vif, bss_conf);
2017         }
2018
2019         mutex_unlock(&sc->mutex);
2020 }
2021
2022 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
2023 {
2024         u64 tsf;
2025         struct ath_wiphy *aphy = hw->priv;
2026         struct ath_softc *sc = aphy->sc;
2027
2028         mutex_lock(&sc->mutex);
2029         tsf = ath9k_hw_gettsf64(sc->sc_ah);
2030         mutex_unlock(&sc->mutex);
2031
2032         return tsf;
2033 }
2034
2035 static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
2036 {
2037         struct ath_wiphy *aphy = hw->priv;
2038         struct ath_softc *sc = aphy->sc;
2039
2040         mutex_lock(&sc->mutex);
2041         ath9k_hw_settsf64(sc->sc_ah, tsf);
2042         mutex_unlock(&sc->mutex);
2043 }
2044
2045 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
2046 {
2047         struct ath_wiphy *aphy = hw->priv;
2048         struct ath_softc *sc = aphy->sc;
2049
2050         mutex_lock(&sc->mutex);
2051
2052         ath9k_ps_wakeup(sc);
2053         ath9k_hw_reset_tsf(sc->sc_ah);
2054         ath9k_ps_restore(sc);
2055
2056         mutex_unlock(&sc->mutex);
2057 }
2058
2059 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2060                               struct ieee80211_vif *vif,
2061                               enum ieee80211_ampdu_mlme_action action,
2062                               struct ieee80211_sta *sta,
2063                               u16 tid, u16 *ssn)
2064 {
2065         struct ath_wiphy *aphy = hw->priv;
2066         struct ath_softc *sc = aphy->sc;
2067         int ret = 0;
2068
2069         local_bh_disable();
2070
2071         switch (action) {
2072         case IEEE80211_AMPDU_RX_START:
2073                 if (!(sc->sc_flags & SC_OP_RXAGGR))
2074                         ret = -ENOTSUPP;
2075                 break;
2076         case IEEE80211_AMPDU_RX_STOP:
2077                 break;
2078         case IEEE80211_AMPDU_TX_START:
2079                 ath9k_ps_wakeup(sc);
2080                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2081                 if (!ret)
2082                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2083                 ath9k_ps_restore(sc);
2084                 break;
2085         case IEEE80211_AMPDU_TX_STOP:
2086                 ath9k_ps_wakeup(sc);
2087                 ath_tx_aggr_stop(sc, sta, tid);
2088                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2089                 ath9k_ps_restore(sc);
2090                 break;
2091         case IEEE80211_AMPDU_TX_OPERATIONAL:
2092                 ath9k_ps_wakeup(sc);
2093                 ath_tx_aggr_resume(sc, sta, tid);
2094                 ath9k_ps_restore(sc);
2095                 break;
2096         default:
2097                 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
2098                           "Unknown AMPDU action\n");
2099         }
2100
2101         local_bh_enable();
2102
2103         return ret;
2104 }
2105
2106 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2107                              struct survey_info *survey)
2108 {
2109         struct ath_wiphy *aphy = hw->priv;
2110         struct ath_softc *sc = aphy->sc;
2111         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2112         struct ieee80211_supported_band *sband;
2113         struct ieee80211_channel *chan;
2114         unsigned long flags;
2115         int pos;
2116
2117         spin_lock_irqsave(&common->cc_lock, flags);
2118         if (idx == 0)
2119                 ath_update_survey_stats(sc);
2120
2121         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2122         if (sband && idx >= sband->n_channels) {
2123                 idx -= sband->n_channels;
2124                 sband = NULL;
2125         }
2126
2127         if (!sband)
2128                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2129
2130         if (!sband || idx >= sband->n_channels) {
2131                 spin_unlock_irqrestore(&common->cc_lock, flags);
2132                 return -ENOENT;
2133         }
2134
2135         chan = &sband->channels[idx];
2136         pos = chan->hw_value;
2137         memcpy(survey, &sc->survey[pos], sizeof(*survey));
2138         survey->channel = chan;
2139         spin_unlock_irqrestore(&common->cc_lock, flags);
2140
2141         return 0;
2142 }
2143
2144 static void ath9k_sw_scan_start(struct ieee80211_hw *hw)
2145 {
2146         struct ath_wiphy *aphy = hw->priv;
2147         struct ath_softc *sc = aphy->sc;
2148
2149         mutex_lock(&sc->mutex);
2150         if (ath9k_wiphy_scanning(sc)) {
2151                 /*
2152                  * There is a race here in mac80211 but fixing it requires
2153                  * we revisit how we handle the scan complete callback.
2154                  * After mac80211 fixes we will not have configured hardware
2155                  * to the home channel nor would we have configured the RX
2156                  * filter yet.
2157                  */
2158                 mutex_unlock(&sc->mutex);
2159                 return;
2160         }
2161
2162         aphy->state = ATH_WIPHY_SCAN;
2163         ath9k_wiphy_pause_all_forced(sc, aphy);
2164         mutex_unlock(&sc->mutex);
2165 }
2166
2167 /*
2168  * XXX: this requires a revisit after the driver
2169  * scan_complete gets moved to another place/removed in mac80211.
2170  */
2171 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
2172 {
2173         struct ath_wiphy *aphy = hw->priv;
2174         struct ath_softc *sc = aphy->sc;
2175
2176         mutex_lock(&sc->mutex);
2177         aphy->state = ATH_WIPHY_ACTIVE;
2178         mutex_unlock(&sc->mutex);
2179 }
2180
2181 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2182 {
2183         struct ath_wiphy *aphy = hw->priv;
2184         struct ath_softc *sc = aphy->sc;
2185         struct ath_hw *ah = sc->sc_ah;
2186
2187         mutex_lock(&sc->mutex);
2188         ah->coverage_class = coverage_class;
2189         ath9k_hw_init_global_settings(ah);
2190         mutex_unlock(&sc->mutex);
2191 }
2192
2193 struct ieee80211_ops ath9k_ops = {
2194         .tx                 = ath9k_tx,
2195         .start              = ath9k_start,
2196         .stop               = ath9k_stop,
2197         .add_interface      = ath9k_add_interface,
2198         .remove_interface   = ath9k_remove_interface,
2199         .config             = ath9k_config,
2200         .configure_filter   = ath9k_configure_filter,
2201         .sta_add            = ath9k_sta_add,
2202         .sta_remove         = ath9k_sta_remove,
2203         .conf_tx            = ath9k_conf_tx,
2204         .bss_info_changed   = ath9k_bss_info_changed,
2205         .set_key            = ath9k_set_key,
2206         .get_tsf            = ath9k_get_tsf,
2207         .set_tsf            = ath9k_set_tsf,
2208         .reset_tsf          = ath9k_reset_tsf,
2209         .ampdu_action       = ath9k_ampdu_action,
2210         .get_survey         = ath9k_get_survey,
2211         .sw_scan_start      = ath9k_sw_scan_start,
2212         .sw_scan_complete   = ath9k_sw_scan_complete,
2213         .rfkill_poll        = ath9k_rfkill_poll_state,
2214         .set_coverage_class = ath9k_set_coverage_class,
2215 };