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

   1 /*
   2  * Copyright (c) 2008-2011 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 <linux/delay.h>
  19 #include "ath9k.h"
  20 #include "btcoex.h"
  21
  22 static u8 parse_mpdudensity(u8 mpdudensity)
  23 {
  24         /*
  25          * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
  26          *   0 for no restriction
  27          *   1 for 1/4 us
  28          *   2 for 1/2 us
  29          *   3 for 1 us
  30          *   4 for 2 us
  31          *   5 for 4 us
  32          *   6 for 8 us
  33          *   7 for 16 us
  34          */
  35         switch (mpdudensity) {
  36         case 0:
  37                 return 0;
  38         case 1:
  39         case 2:
  40         case 3:
  41                 /* Our lower layer calculations limit our precision to
  42                    1 microsecond */
  43                 return 1;
  44         case 4:
  45                 return 2;
  46         case 5:
  47                 return 4;
  48         case 6:
  49                 return 8;
  50         case 7:
  51                 return 16;
  52         default:
  53                 return 0;
  54         }
  55 }
  56
  57 static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq)
  58 {
  59         bool pending = false;
  60
  61         spin_lock_bh(&txq->axq_lock);
  62
  63         if (txq->axq_depth || !list_empty(&txq->axq_acq))
  64                 pending = true;
  65
  66         spin_unlock_bh(&txq->axq_lock);
  67         return pending;
  68 }
  69
  70 static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
  71 {
  72         unsigned long flags;
  73         bool ret;
  74
  75         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  76         ret = ath9k_hw_setpower(sc->sc_ah, mode);
  77         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
  78
  79         return ret;
  80 }
  81
  82 void ath9k_ps_wakeup(struct ath_softc *sc)
  83 {
  84         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
  85         unsigned long flags;
  86         enum ath9k_power_mode power_mode;
  87
  88         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  89         if (++sc->ps_usecount != 1)
  90                 goto unlock;
  91
  92         power_mode = sc->sc_ah->power_mode;
  93         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
  94
  95         /*
  96          * While the hardware is asleep, the cycle counters contain no
  97          * useful data. Better clear them now so that they don't mess up
  98          * survey data results.
  99          */
 100         if (power_mode != ATH9K_PM_AWAKE) {
 101                 spin_lock(&common->cc_lock);
 102                 ath_hw_cycle_counters_update(common);
 103                 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
 104                 spin_unlock(&common->cc_lock);
 105         }
 106
 107  unlock:
 108         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 109 }
 110
 111 void ath9k_ps_restore(struct ath_softc *sc)
 112 {
 113         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 114         enum ath9k_power_mode mode;
 115         unsigned long flags;
 116
 117         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 118         if (--sc->ps_usecount != 0)
 119                 goto unlock;
 120
 121         if (sc->ps_idle)
 122                 mode = ATH9K_PM_FULL_SLEEP;
 123         else if (sc->ps_enabled &&
 124                  !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
 125                               PS_WAIT_FOR_CAB |
 126                               PS_WAIT_FOR_PSPOLL_DATA |
 127                               PS_WAIT_FOR_TX_ACK)))
 128                 mode = ATH9K_PM_NETWORK_SLEEP;
 129         else
 130                 goto unlock;
 131
 132         spin_lock(&common->cc_lock);
 133         ath_hw_cycle_counters_update(common);
 134         spin_unlock(&common->cc_lock);
 135
 136         ath9k_hw_setpower(sc->sc_ah, mode);
 137
 138  unlock:
 139         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 140 }
 141
 142 void ath_start_ani(struct ath_common *common)
 143 {
 144         struct ath_hw *ah = common->ah;
 145         unsigned long timestamp = jiffies_to_msecs(jiffies);
 146         struct ath_softc *sc = (struct ath_softc *) common->priv;
 147
 148         if (!(sc->sc_flags & SC_OP_ANI_RUN))
 149                 return;
 150
 151         if (sc->sc_flags & SC_OP_OFFCHANNEL)
 152                 return;
 153
 154         common->ani.longcal_timer = timestamp;
 155         common->ani.shortcal_timer = timestamp;
 156         common->ani.checkani_timer = timestamp;
 157
 158         mod_timer(&common->ani.timer,
 159                   jiffies +
 160                         msecs_to_jiffies((u32)ah->config.ani_poll_interval));
 161 }
 162
 163 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
 164 {
 165         struct ath_hw *ah = sc->sc_ah;
 166         struct ath9k_channel *chan = &ah->channels[channel];
 167         struct survey_info *survey = &sc->survey[channel];
 168
 169         if (chan->noisefloor) {
 170                 survey->filled |= SURVEY_INFO_NOISE_DBM;
 171                 survey->noise = ath9k_hw_getchan_noise(ah, chan);
 172         }
 173 }
 174
 175 /*
 176  * Updates the survey statistics and returns the busy time since last
 177  * update in %, if the measurement duration was long enough for the
 178  * result to be useful, -1 otherwise.
 179  */
 180 static int 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         int ret = 0;
 189
 190         if (!ah->curchan)
 191                 return -1;
 192
 193         if (ah->power_mode == ATH9K_PM_AWAKE)
 194                 ath_hw_cycle_counters_update(common);
 195
 196         if (cc->cycles > 0) {
 197                 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
 198                         SURVEY_INFO_CHANNEL_TIME_BUSY |
 199                         SURVEY_INFO_CHANNEL_TIME_RX |
 200                         SURVEY_INFO_CHANNEL_TIME_TX;
 201                 survey->channel_time += cc->cycles / div;
 202                 survey->channel_time_busy += cc->rx_busy / div;
 203                 survey->channel_time_rx += cc->rx_frame / div;
 204                 survey->channel_time_tx += cc->tx_frame / div;
 205         }
 206
 207         if (cc->cycles < div)
 208                 return -1;
 209
 210         if (cc->cycles > 0)
 211                 ret = cc->rx_busy * 100 / cc->cycles;
 212
 213         memset(cc, 0, sizeof(*cc));
 214
 215         ath_update_survey_nf(sc, pos);
 216
 217         return ret;
 218 }
 219
 220 static void __ath_cancel_work(struct ath_softc *sc)
 221 {
 222         cancel_work_sync(&sc->paprd_work);
 223         cancel_work_sync(&sc->hw_check_work);
 224         cancel_delayed_work_sync(&sc->tx_complete_work);
 225         cancel_delayed_work_sync(&sc->hw_pll_work);
 226 }
 227
 228 static void ath_cancel_work(struct ath_softc *sc)
 229 {
 230         __ath_cancel_work(sc);
 231         cancel_work_sync(&sc->hw_reset_work);
 232 }
 233
 234 static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
 235 {
 236         struct ath_hw *ah = sc->sc_ah;
 237         struct ath_common *common = ath9k_hw_common(ah);
 238         bool ret;
 239
 240         ieee80211_stop_queues(sc->hw);
 241
 242         sc->hw_busy_count = 0;
 243         del_timer_sync(&common->ani.timer);
 244
 245         ath9k_debug_samp_bb_mac(sc);
 246         ath9k_hw_disable_interrupts(ah);
 247
 248         ret = ath_drain_all_txq(sc, retry_tx);
 249
 250         if (!ath_stoprecv(sc))
 251                 ret = false;
 252
 253         if (!flush) {
 254                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 255                         ath_rx_tasklet(sc, 1, true);
 256                 ath_rx_tasklet(sc, 1, false);
 257         } else {
 258                 ath_flushrecv(sc);
 259         }
 260
 261         return ret;
 262 }
 263
 264 static bool ath_complete_reset(struct ath_softc *sc, bool start)
 265 {
 266         struct ath_hw *ah = sc->sc_ah;
 267         struct ath_common *common = ath9k_hw_common(ah);
 268
 269         if (ath_startrecv(sc) != 0) {
 270                 ath_err(common, "Unable to restart recv logic\n");
 271                 return false;
 272         }
 273
 274         ath9k_cmn_update_txpow(ah, sc->curtxpow,
 275                                sc->config.txpowlimit, &sc->curtxpow);
 276         ath9k_hw_set_interrupts(ah, ah->imask);
 277         ath9k_hw_enable_interrupts(ah);
 278
 279         if (!(sc->sc_flags & (SC_OP_OFFCHANNEL)) && start) {
 280                 if (sc->sc_flags & SC_OP_BEACONS)
 281                         ath_set_beacon(sc);
 282
 283                 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 284                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
 285                 if (!common->disable_ani)
 286                         ath_start_ani(common);
 287         }
 288
 289         if (ath9k_hw_ops(ah)->antdiv_comb_conf_get && sc->ant_rx != 3) {
 290                 struct ath_hw_antcomb_conf div_ant_conf;
 291                 u8 lna_conf;
 292
 293                 ath9k_hw_antdiv_comb_conf_get(ah, &div_ant_conf);
 294
 295                 if (sc->ant_rx == 1)
 296                         lna_conf = ATH_ANT_DIV_COMB_LNA1;
 297                 else
 298                         lna_conf = ATH_ANT_DIV_COMB_LNA2;
 299                 div_ant_conf.main_lna_conf = lna_conf;
 300                 div_ant_conf.alt_lna_conf = lna_conf;
 301
 302                 ath9k_hw_antdiv_comb_conf_set(ah, &div_ant_conf);
 303         }
 304
 305         ieee80211_wake_queues(sc->hw);
 306
 307         return true;
 308 }
 309
 310 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan,
 311                               bool retry_tx)
 312 {
 313         struct ath_hw *ah = sc->sc_ah;
 314         struct ath_common *common = ath9k_hw_common(ah);
 315         struct ath9k_hw_cal_data *caldata = NULL;
 316         bool fastcc = true;
 317         bool flush = false;
 318         int r;
 319
 320         __ath_cancel_work(sc);
 321
 322         spin_lock_bh(&sc->sc_pcu_lock);
 323
 324         if (!(sc->sc_flags & SC_OP_OFFCHANNEL)) {
 325                 fastcc = false;
 326                 caldata = &sc->caldata;
 327         }
 328
 329         if (!hchan) {
 330                 fastcc = false;
 331                 flush = true;
 332                 hchan = ah->curchan;
 333         }
 334
 335         if (fastcc && !ath9k_hw_check_alive(ah))
 336                 fastcc = false;
 337
 338         if (!ath_prepare_reset(sc, retry_tx, flush))
 339                 fastcc = false;
 340
 341         ath_dbg(common, ATH_DBG_CONFIG,
 342                 "Reset to %u MHz, HT40: %d fastcc: %d\n",
 343                 hchan->channel, !!(hchan->channelFlags & (CHANNEL_HT40MINUS |
 344                                                           CHANNEL_HT40PLUS)),
 345                 fastcc);
 346
 347         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 348         if (r) {
 349                 ath_err(common,
 350                         "Unable to reset channel, reset status %d\n", r);
 351                 goto out;
 352         }
 353
 354         if (!ath_complete_reset(sc, true))
 355                 r = -EIO;
 356
 357 out:
 358         spin_unlock_bh(&sc->sc_pcu_lock);
 359         return r;
 360 }
 361
 362
 363 /*
 364  * Set/change channels.  If the channel is really being changed, it's done
 365  * by reseting the chip.  To accomplish this we must first cleanup any pending
 366  * DMA, then restart stuff.
 367 */
 368 static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 369                     struct ath9k_channel *hchan)
 370 {
 371         int r;
 372
 373         if (sc->sc_flags & SC_OP_INVALID)
 374                 return -EIO;
 375
 376         ath9k_ps_wakeup(sc);
 377
 378         r = ath_reset_internal(sc, hchan, false);
 379
 380         ath9k_ps_restore(sc);
 381
 382         return r;
 383 }
 384
 385 static void ath_paprd_activate(struct ath_softc *sc)
 386 {
 387         struct ath_hw *ah = sc->sc_ah;
 388         struct ath9k_hw_cal_data *caldata = ah->caldata;
 389         int chain;
 390
 391         if (!caldata || !caldata->paprd_done)
 392                 return;
 393
 394         ath9k_ps_wakeup(sc);
 395         ar9003_paprd_enable(ah, false);
 396         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 397                 if (!(ah->txchainmask & BIT(chain)))
 398                         continue;
 399
 400                 ar9003_paprd_populate_single_table(ah, caldata, chain);
 401         }
 402
 403         ar9003_paprd_enable(ah, true);
 404         ath9k_ps_restore(sc);
 405 }
 406
 407 static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
 408 {
 409         struct ieee80211_hw *hw = sc->hw;
 410         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 411         struct ath_hw *ah = sc->sc_ah;
 412         struct ath_common *common = ath9k_hw_common(ah);
 413         struct ath_tx_control txctl;
 414         int time_left;
 415
 416         memset(&txctl, 0, sizeof(txctl));
 417         txctl.txq = sc->tx.txq_map[WME_AC_BE];
 418
 419         memset(tx_info, 0, sizeof(*tx_info));
 420         tx_info->band = hw->conf.channel->band;
 421         tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
 422         tx_info->control.rates[0].idx = 0;
 423         tx_info->control.rates[0].count = 1;
 424         tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
 425         tx_info->control.rates[1].idx = -1;
 426
 427         init_completion(&sc->paprd_complete);
 428         txctl.paprd = BIT(chain);
 429
 430         if (ath_tx_start(hw, skb, &txctl) != 0) {
 431                 ath_dbg(common, ATH_DBG_CALIBRATE, "PAPRD TX failed\n");
 432                 dev_kfree_skb_any(skb);
 433                 return false;
 434         }
 435
 436         time_left = wait_for_completion_timeout(&sc->paprd_complete,
 437                         msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
 438
 439         if (!time_left)
 440                 ath_dbg(common, ATH_DBG_CALIBRATE,
 441                         "Timeout waiting for paprd training on TX chain %d\n",
 442                         chain);
 443
 444         return !!time_left;
 445 }
 446
 447 void ath_paprd_calibrate(struct work_struct *work)
 448 {
 449         struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
 450         struct ieee80211_hw *hw = sc->hw;
 451         struct ath_hw *ah = sc->sc_ah;
 452         struct ieee80211_hdr *hdr;
 453         struct sk_buff *skb = NULL;
 454         struct ath9k_hw_cal_data *caldata = ah->caldata;
 455         struct ath_common *common = ath9k_hw_common(ah);
 456         int ftype;
 457         int chain_ok = 0;
 458         int chain;
 459         int len = 1800;
 460
 461         if (!caldata)
 462                 return;
 463
 464         ath9k_ps_wakeup(sc);
 465
 466         if (ar9003_paprd_init_table(ah) < 0)
 467                 goto fail_paprd;
 468
 469         skb = alloc_skb(len, GFP_KERNEL);
 470         if (!skb)
 471                 goto fail_paprd;
 472
 473         skb_put(skb, len);
 474         memset(skb->data, 0, len);
 475         hdr = (struct ieee80211_hdr *)skb->data;
 476         ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
 477         hdr->frame_control = cpu_to_le16(ftype);
 478         hdr->duration_id = cpu_to_le16(10);
 479         memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
 480         memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
 481         memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
 482
 483         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 484                 if (!(ah->txchainmask & BIT(chain)))
 485                         continue;
 486
 487                 chain_ok = 0;
 488
 489                 ath_dbg(common, ATH_DBG_CALIBRATE,
 490                         "Sending PAPRD frame for thermal measurement "
 491                         "on chain %d\n", chain);
 492                 if (!ath_paprd_send_frame(sc, skb, chain))
 493                         goto fail_paprd;
 494
 495                 ar9003_paprd_setup_gain_table(ah, chain);
 496
 497                 ath_dbg(common, ATH_DBG_CALIBRATE,
 498                         "Sending PAPRD training frame on chain %d\n", chain);
 499                 if (!ath_paprd_send_frame(sc, skb, chain))
 500                         goto fail_paprd;
 501
 502                 if (!ar9003_paprd_is_done(ah)) {
 503                         ath_dbg(common, ATH_DBG_CALIBRATE,
 504                                 "PAPRD not yet done on chain %d\n", chain);
 505                         break;
 506                 }
 507
 508                 if (ar9003_paprd_create_curve(ah, caldata, chain)) {
 509                         ath_dbg(common, ATH_DBG_CALIBRATE,
 510                                 "PAPRD create curve failed on chain %d\n",
 511                                                                    chain);
 512                         break;
 513                 }
 514
 515                 chain_ok = 1;
 516         }
 517         kfree_skb(skb);
 518
 519         if (chain_ok) {
 520                 caldata->paprd_done = true;
 521                 ath_paprd_activate(sc);
 522         }
 523
 524 fail_paprd:
 525         ath9k_ps_restore(sc);
 526 }
 527
 528 /*
 529  *  This routine performs the periodic noise floor calibration function
 530  *  that is used to adjust and optimize the chip performance.  This
 531  *  takes environmental changes (location, temperature) into account.
 532  *  When the task is complete, it reschedules itself depending on the
 533  *  appropriate interval that was calculated.
 534  */
 535 void ath_ani_calibrate(unsigned long data)
 536 {
 537         struct ath_softc *sc = (struct ath_softc *)data;
 538         struct ath_hw *ah = sc->sc_ah;
 539         struct ath_common *common = ath9k_hw_common(ah);
 540         bool longcal = false;
 541         bool shortcal = false;
 542         bool aniflag = false;
 543         unsigned int timestamp = jiffies_to_msecs(jiffies);
 544         u32 cal_interval, short_cal_interval, long_cal_interval;
 545         unsigned long flags;
 546
 547         if (ah->caldata && ah->caldata->nfcal_interference)
 548                 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
 549         else
 550                 long_cal_interval = ATH_LONG_CALINTERVAL;
 551
 552         short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
 553                 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
 554
 555         /* Only calibrate if awake */
 556         if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
 557                 goto set_timer;
 558
 559         ath9k_ps_wakeup(sc);
 560
 561         /* Long calibration runs independently of short calibration. */
 562         if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
 563                 longcal = true;
 564                 ath_dbg(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
 565                 common->ani.longcal_timer = timestamp;
 566         }
 567
 568         /* Short calibration applies only while caldone is false */
 569         if (!common->ani.caldone) {
 570                 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
 571                         shortcal = true;
 572                         ath_dbg(common, ATH_DBG_ANI,
 573                                 "shortcal @%lu\n", jiffies);
 574                         common->ani.shortcal_timer = timestamp;
 575                         common->ani.resetcal_timer = timestamp;
 576                 }
 577         } else {
 578                 if ((timestamp - common->ani.resetcal_timer) >=
 579                     ATH_RESTART_CALINTERVAL) {
 580                         common->ani.caldone = ath9k_hw_reset_calvalid(ah);
 581                         if (common->ani.caldone)
 582                                 common->ani.resetcal_timer = timestamp;
 583                 }
 584         }
 585
 586         /* Verify whether we must check ANI */
 587         if ((timestamp - common->ani.checkani_timer) >=
 588              ah->config.ani_poll_interval) {
 589                 aniflag = true;
 590                 common->ani.checkani_timer = timestamp;
 591         }
 592
 593         /* Call ANI routine if necessary */
 594         if (aniflag) {
 595                 spin_lock_irqsave(&common->cc_lock, flags);
 596                 ath9k_hw_ani_monitor(ah, ah->curchan);
 597                 ath_update_survey_stats(sc);
 598                 spin_unlock_irqrestore(&common->cc_lock, flags);
 599         }
 600
 601         /* Perform calibration if necessary */
 602         if (longcal || shortcal) {
 603                 common->ani.caldone =
 604                         ath9k_hw_calibrate(ah, ah->curchan,
 605                                                 ah->rxchainmask, longcal);
 606         }
 607
 608         ath9k_ps_restore(sc);
 609
 610 set_timer:
 611         /*
 612         * Set timer interval based on previous results.
 613         * The interval must be the shortest necessary to satisfy ANI,
 614         * short calibration and long calibration.
 615         */
 616         ath9k_debug_samp_bb_mac(sc);
 617         cal_interval = ATH_LONG_CALINTERVAL;
 618         if (sc->sc_ah->config.enable_ani)
 619                 cal_interval = min(cal_interval,
 620                                    (u32)ah->config.ani_poll_interval);
 621         if (!common->ani.caldone)
 622                 cal_interval = min(cal_interval, (u32)short_cal_interval);
 623
 624         mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
 625         if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
 626                 if (!ah->caldata->paprd_done)
 627                         ieee80211_queue_work(sc->hw, &sc->paprd_work);
 628                 else if (!ah->paprd_table_write_done)
 629                         ath_paprd_activate(sc);
 630         }
 631 }
 632
 633 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
 634 {
 635         struct ath_node *an;
 636         an = (struct ath_node *)sta->drv_priv;
 637
 638 #ifdef CONFIG_ATH9K_DEBUGFS
 639         spin_lock(&sc->nodes_lock);
 640         list_add(&an->list, &sc->nodes);
 641         spin_unlock(&sc->nodes_lock);
 642         an->sta = sta;
 643 #endif
 644         if (sc->sc_flags & SC_OP_TXAGGR) {
 645                 ath_tx_node_init(sc, an);
 646                 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
 647                                      sta->ht_cap.ampdu_factor);
 648                 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
 649         }
 650 }
 651
 652 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 653 {
 654         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 655
 656 #ifdef CONFIG_ATH9K_DEBUGFS
 657         spin_lock(&sc->nodes_lock);
 658         list_del(&an->list);
 659         spin_unlock(&sc->nodes_lock);
 660         an->sta = NULL;
 661 #endif
 662
 663         if (sc->sc_flags & SC_OP_TXAGGR)
 664                 ath_tx_node_cleanup(sc, an);
 665 }
 666
 667
 668 void ath9k_tasklet(unsigned long data)
 669 {
 670         struct ath_softc *sc = (struct ath_softc *)data;
 671         struct ath_hw *ah = sc->sc_ah;
 672         struct ath_common *common = ath9k_hw_common(ah);
 673
 674         u32 status = sc->intrstatus;
 675         u32 rxmask;
 676
 677         ath9k_ps_wakeup(sc);
 678         spin_lock(&sc->sc_pcu_lock);
 679
 680         if ((status & ATH9K_INT_FATAL) ||
 681             (status & ATH9K_INT_BB_WATCHDOG)) {
 682                 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 683                 goto out;
 684         }
 685
 686         /*
 687          * Only run the baseband hang check if beacons stop working in AP or
 688          * IBSS mode, because it has a high false positive rate. For station
 689          * mode it should not be necessary, since the upper layers will detect
 690          * this through a beacon miss automatically and the following channel
 691          * change will trigger a hardware reset anyway
 692          */
 693         if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 &&
 694             !ath9k_hw_check_alive(ah))
 695                 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
 696
 697         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 698                 /*
 699                  * TSF sync does not look correct; remain awake to sync with
 700                  * the next Beacon.
 701                  */
 702                 ath_dbg(common, ATH_DBG_PS,
 703                         "TSFOOR - Sync with next Beacon\n");
 704                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
 705         }
 706
 707         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 708                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
 709                           ATH9K_INT_RXORN);
 710         else
 711                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 712
 713         if (status & rxmask) {
 714                 /* Check for high priority Rx first */
 715                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 716                     (status & ATH9K_INT_RXHP))
 717                         ath_rx_tasklet(sc, 0, true);
 718
 719                 ath_rx_tasklet(sc, 0, false);
 720         }
 721
 722         if (status & ATH9K_INT_TX) {
 723                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 724                         ath_tx_edma_tasklet(sc);
 725                 else
 726                         ath_tx_tasklet(sc);
 727         }
 728
 729         if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
 730                 if (status & ATH9K_INT_GENTIMER)
 731                         ath_gen_timer_isr(sc->sc_ah);
 732
 733 out:
 734         /* re-enable hardware interrupt */
 735         ath9k_hw_enable_interrupts(ah);
 736
 737         spin_unlock(&sc->sc_pcu_lock);
 738         ath9k_ps_restore(sc);
 739 }
 740
 741 irqreturn_t ath_isr(int irq, void *dev)
 742 {
 743 #define SCHED_INTR (                            \
 744                 ATH9K_INT_FATAL |               \
 745                 ATH9K_INT_BB_WATCHDOG |         \
 746                 ATH9K_INT_RXORN |               \
 747                 ATH9K_INT_RXEOL |               \
 748                 ATH9K_INT_RX |                  \
 749                 ATH9K_INT_RXLP |                \
 750                 ATH9K_INT_RXHP |                \
 751                 ATH9K_INT_TX |                  \
 752                 ATH9K_INT_BMISS |               \
 753                 ATH9K_INT_CST |                 \
 754                 ATH9K_INT_TSFOOR |              \
 755                 ATH9K_INT_GENTIMER)
 756
 757         struct ath_softc *sc = dev;
 758         struct ath_hw *ah = sc->sc_ah;
 759         struct ath_common *common = ath9k_hw_common(ah);
 760         enum ath9k_int status;
 761         bool sched = false;
 762
 763         /*
 764          * The hardware is not ready/present, don't
 765          * touch anything. Note this can happen early
 766          * on if the IRQ is shared.
 767          */
 768         if (sc->sc_flags & SC_OP_INVALID)
 769                 return IRQ_NONE;
 770
 771
 772         /* shared irq, not for us */
 773
 774         if (!ath9k_hw_intrpend(ah))
 775                 return IRQ_NONE;
 776
 777         /*
 778          * Figure out the reason(s) for the interrupt.  Note
 779          * that the hal returns a pseudo-ISR that may include
 780          * bits we haven't explicitly enabled so we mask the
 781          * value to insure we only process bits we requested.
 782          */
 783         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
 784         status &= ah->imask;    /* discard unasked-for bits */
 785
 786         /*
 787          * If there are no status bits set, then this interrupt was not
 788          * for me (should have been caught above).
 789          */
 790         if (!status)
 791                 return IRQ_NONE;
 792
 793         /* Cache the status */
 794         sc->intrstatus = status;
 795
 796         if (status & SCHED_INTR)
 797                 sched = true;
 798
 799         /*
 800          * If a FATAL or RXORN interrupt is received, we have to reset the
 801          * chip immediately.
 802          */
 803         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
 804             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
 805                 goto chip_reset;
 806
 807         if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 808             (status & ATH9K_INT_BB_WATCHDOG)) {
 809
 810                 spin_lock(&common->cc_lock);
 811                 ath_hw_cycle_counters_update(common);
 812                 ar9003_hw_bb_watchdog_dbg_info(ah);
 813                 spin_unlock(&common->cc_lock);
 814
 815                 goto chip_reset;
 816         }
 817
 818         if (status & ATH9K_INT_SWBA)
 819                 tasklet_schedule(&sc->bcon_tasklet);
 820
 821         if (status & ATH9K_INT_TXURN)
 822                 ath9k_hw_updatetxtriglevel(ah, true);
 823
 824         if (status & ATH9K_INT_RXEOL) {
 825                 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 826                 ath9k_hw_set_interrupts(ah, ah->imask);
 827         }
 828
 829         if (status & ATH9K_INT_MIB) {
 830                 /*
 831                  * Disable interrupts until we service the MIB
 832                  * interrupt; otherwise it will continue to
 833                  * fire.
 834                  */
 835                 ath9k_hw_disable_interrupts(ah);
 836                 /*
 837                  * Let the hal handle the event. We assume
 838                  * it will clear whatever condition caused
 839                  * the interrupt.
 840                  */
 841                 spin_lock(&common->cc_lock);
 842                 ath9k_hw_proc_mib_event(ah);
 843                 spin_unlock(&common->cc_lock);
 844                 ath9k_hw_enable_interrupts(ah);
 845         }
 846
 847         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 848                 if (status & ATH9K_INT_TIM_TIMER) {
 849                         if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
 850                                 goto chip_reset;
 851                         /* Clear RxAbort bit so that we can
 852                          * receive frames */
 853                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
 854                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 855                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
 856                 }
 857
 858 chip_reset:
 859
 860         ath_debug_stat_interrupt(sc, status);
 861
 862         if (sched) {
 863                 /* turn off every interrupt */
 864                 ath9k_hw_disable_interrupts(ah);
 865                 tasklet_schedule(&sc->intr_tq);
 866         }
 867
 868         return IRQ_HANDLED;
 869
 870 #undef SCHED_INTR
 871 }
 872
 873 static void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
 874 {
 875         struct ath_hw *ah = sc->sc_ah;
 876         struct ath_common *common = ath9k_hw_common(ah);
 877         struct ieee80211_channel *channel = hw->conf.channel;
 878         int r;
 879
 880         ath9k_ps_wakeup(sc);
 881         spin_lock_bh(&sc->sc_pcu_lock);
 882         atomic_set(&ah->intr_ref_cnt, -1);
 883
 884         ath9k_hw_configpcipowersave(ah, false);
 885
 886         if (!ah->curchan)
 887                 ah->curchan = ath9k_cmn_get_curchannel(sc->hw, ah);
 888
 889         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 890         if (r) {
 891                 ath_err(common,
 892                         "Unable to reset channel (%u MHz), reset status %d\n",
 893                         channel->center_freq, r);
 894         }
 895
 896         ath_complete_reset(sc, true);
 897
 898         /* Enable LED */
 899         ath9k_hw_cfg_output(ah, ah->led_pin,
 900                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 901         ath9k_hw_set_gpio(ah, ah->led_pin, 0);
 902
 903         spin_unlock_bh(&sc->sc_pcu_lock);
 904
 905         ath9k_ps_restore(sc);
 906 }
 907
 908 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
 909 {
 910         struct ath_hw *ah = sc->sc_ah;
 911         struct ieee80211_channel *channel = hw->conf.channel;
 912         int r;
 913
 914         ath9k_ps_wakeup(sc);
 915
 916         ath_cancel_work(sc);
 917
 918         spin_lock_bh(&sc->sc_pcu_lock);
 919
 920         /*
 921          * Keep the LED on when the radio is disabled
 922          * during idle unassociated state.
 923          */
 924         if (!sc->ps_idle) {
 925                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
 926                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
 927         }
 928
 929         ath_prepare_reset(sc, false, true);
 930
 931         if (!ah->curchan)
 932                 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
 933
 934         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 935         if (r) {
 936                 ath_err(ath9k_hw_common(sc->sc_ah),
 937                         "Unable to reset channel (%u MHz), reset status %d\n",
 938                         channel->center_freq, r);
 939         }
 940
 941         ath9k_hw_phy_disable(ah);
 942
 943         ath9k_hw_configpcipowersave(ah, true);
 944
 945         spin_unlock_bh(&sc->sc_pcu_lock);
 946         ath9k_ps_restore(sc);
 947 }
 948
 949 static int ath_reset(struct ath_softc *sc, bool retry_tx)
 950 {
 951         int r;
 952
 953         ath9k_ps_wakeup(sc);
 954
 955         r = ath_reset_internal(sc, NULL, retry_tx);
 956
 957         if (retry_tx) {
 958                 int i;
 959                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
 960                         if (ATH_TXQ_SETUP(sc, i)) {
 961                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
 962                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
 963                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
 964                         }
 965                 }
 966         }
 967
 968         ath9k_ps_restore(sc);
 969
 970         return r;
 971 }
 972
 973 void ath_reset_work(struct work_struct *work)
 974 {
 975         struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
 976
 977         ath_reset(sc, true);
 978 }
 979
 980 void ath_hw_check(struct work_struct *work)
 981 {
 982         struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
 983         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 984         unsigned long flags;
 985         int busy;
 986
 987         ath9k_ps_wakeup(sc);
 988         if (ath9k_hw_check_alive(sc->sc_ah))
 989                 goto out;
 990
 991         spin_lock_irqsave(&common->cc_lock, flags);
 992         busy = ath_update_survey_stats(sc);
 993         spin_unlock_irqrestore(&common->cc_lock, flags);
 994
 995         ath_dbg(common, ATH_DBG_RESET, "Possible baseband hang, "
 996                 "busy=%d (try %d)\n", busy, sc->hw_busy_count + 1);
 997         if (busy >= 99) {
 998                 if (++sc->hw_busy_count >= 3)
 999                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
1000
1001         } else if (busy >= 0)
1002                 sc->hw_busy_count = 0;
1003
1004 out:
1005         ath9k_ps_restore(sc);
1006 }
1007
1008 static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
1009 {
1010         static int count;
1011         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1012
1013         if (pll_sqsum >= 0x40000) {
1014                 count++;
1015                 if (count == 3) {
1016                         /* Rx is hung for more than 500ms. Reset it */
1017                         ath_dbg(common, ATH_DBG_RESET,
1018                                 "Possible RX hang, resetting");
1019                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
1020                         count = 0;
1021                 }
1022         } else
1023                 count = 0;
1024 }
1025
1026 void ath_hw_pll_work(struct work_struct *work)
1027 {
1028         struct ath_softc *sc = container_of(work, struct ath_softc,
1029                                             hw_pll_work.work);
1030         u32 pll_sqsum;
1031
1032         if (AR_SREV_9485(sc->sc_ah)) {
1033
1034                 ath9k_ps_wakeup(sc);
1035                 pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
1036                 ath9k_ps_restore(sc);
1037
1038                 ath_hw_pll_rx_hang_check(sc, pll_sqsum);
1039
1040                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
1041         }
1042 }
1043
1044 /**********************/
1045 /* mac80211 callbacks */
1046 /**********************/
1047
1048 static int ath9k_start(struct ieee80211_hw *hw)
1049 {
1050         struct ath_softc *sc = hw->priv;
1051         struct ath_hw *ah = sc->sc_ah;
1052         struct ath_common *common = ath9k_hw_common(ah);
1053         struct ieee80211_channel *curchan = hw->conf.channel;
1054         struct ath9k_channel *init_channel;
1055         int r;
1056
1057         ath_dbg(common, ATH_DBG_CONFIG,
1058                 "Starting driver with initial channel: %d MHz\n",
1059                 curchan->center_freq);
1060
1061         ath9k_ps_wakeup(sc);
1062
1063         mutex_lock(&sc->mutex);
1064
1065         /* setup initial channel */
1066         sc->chan_idx = curchan->hw_value;
1067
1068         init_channel = ath9k_cmn_get_curchannel(hw, ah);
1069
1070         /* Reset SERDES registers */
1071         ath9k_hw_configpcipowersave(ah, false);
1072
1073         /*
1074          * The basic interface to setting the hardware in a good
1075          * state is ``reset''.  On return the hardware is known to
1076          * be powered up and with interrupts disabled.  This must
1077          * be followed by initialization of the appropriate bits
1078          * and then setup of the interrupt mask.
1079          */
1080         spin_lock_bh(&sc->sc_pcu_lock);
1081         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1082         if (r) {
1083                 ath_err(common,
1084                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1085                         r, curchan->center_freq);
1086                 spin_unlock_bh(&sc->sc_pcu_lock);
1087                 goto mutex_unlock;
1088         }
1089
1090         /* Setup our intr mask. */
1091         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1092                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1093                     ATH9K_INT_GLOBAL;
1094
1095         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1096                 ah->imask |= ATH9K_INT_RXHP |
1097                              ATH9K_INT_RXLP |
1098                              ATH9K_INT_BB_WATCHDOG;
1099         else
1100                 ah->imask |= ATH9K_INT_RX;
1101
1102         ah->imask |= ATH9K_INT_GTT;
1103
1104         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1105                 ah->imask |= ATH9K_INT_CST;
1106
1107         sc->sc_flags &= ~SC_OP_INVALID;
1108         sc->sc_ah->is_monitoring = false;
1109
1110         /* Disable BMISS interrupt when we're not associated */
1111         ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1112
1113         if (!ath_complete_reset(sc, false)) {
1114                 r = -EIO;
1115                 spin_unlock_bh(&sc->sc_pcu_lock);
1116                 goto mutex_unlock;
1117         }
1118
1119         spin_unlock_bh(&sc->sc_pcu_lock);
1120
1121         if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1122             !ah->btcoex_hw.enabled) {
1123                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1124                                            AR_STOMP_LOW_WLAN_WGHT);
1125                 ath9k_hw_btcoex_enable(ah);
1126
1127                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1128                         ath9k_btcoex_timer_resume(sc);
1129         }
1130
1131         if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1132                 common->bus_ops->extn_synch_en(common);
1133
1134 mutex_unlock:
1135         mutex_unlock(&sc->mutex);
1136
1137         ath9k_ps_restore(sc);
1138
1139         return r;
1140 }
1141
1142 static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1143 {
1144         struct ath_softc *sc = hw->priv;
1145         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1146         struct ath_tx_control txctl;
1147         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1148
1149         if (sc->ps_enabled) {
1150                 /*
1151                  * mac80211 does not set PM field for normal data frames, so we
1152                  * need to update that based on the current PS mode.
1153                  */
1154                 if (ieee80211_is_data(hdr->frame_control) &&
1155                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1156                     !ieee80211_has_pm(hdr->frame_control)) {
1157                         ath_dbg(common, ATH_DBG_PS,
1158                                 "Add PM=1 for a TX frame while in PS mode\n");
1159                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1160                 }
1161         }
1162
1163         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1164                 /*
1165                  * We are using PS-Poll and mac80211 can request TX while in
1166                  * power save mode. Need to wake up hardware for the TX to be
1167                  * completed and if needed, also for RX of buffered frames.
1168                  */
1169                 ath9k_ps_wakeup(sc);
1170                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1171                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1172                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1173                         ath_dbg(common, ATH_DBG_PS,
1174                                 "Sending PS-Poll to pick a buffered frame\n");
1175                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1176                 } else {
1177                         ath_dbg(common, ATH_DBG_PS,
1178                                 "Wake up to complete TX\n");
1179                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1180                 }
1181                 /*
1182                  * The actual restore operation will happen only after
1183                  * the sc_flags bit is cleared. We are just dropping
1184                  * the ps_usecount here.
1185                  */
1186                 ath9k_ps_restore(sc);
1187         }
1188
1189         memset(&txctl, 0, sizeof(struct ath_tx_control));
1190         txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1191
1192         ath_dbg(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1193
1194         if (ath_tx_start(hw, skb, &txctl) != 0) {
1195                 ath_dbg(common, ATH_DBG_XMIT, "TX failed\n");
1196                 goto exit;
1197         }
1198
1199         return;
1200 exit:
1201         dev_kfree_skb_any(skb);
1202 }
1203
1204 static void ath9k_stop(struct ieee80211_hw *hw)
1205 {
1206         struct ath_softc *sc = hw->priv;
1207         struct ath_hw *ah = sc->sc_ah;
1208         struct ath_common *common = ath9k_hw_common(ah);
1209
1210         mutex_lock(&sc->mutex);
1211
1212         ath_cancel_work(sc);
1213
1214         if (sc->sc_flags & SC_OP_INVALID) {
1215                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
1216                 mutex_unlock(&sc->mutex);
1217                 return;
1218         }
1219
1220         /* Ensure HW is awake when we try to shut it down. */
1221         ath9k_ps_wakeup(sc);
1222
1223         if (ah->btcoex_hw.enabled) {
1224                 ath9k_hw_btcoex_disable(ah);
1225                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1226                         ath9k_btcoex_timer_pause(sc);
1227         }
1228
1229         spin_lock_bh(&sc->sc_pcu_lock);
1230
1231         /* prevent tasklets to enable interrupts once we disable them */
1232         ah->imask &= ~ATH9K_INT_GLOBAL;
1233
1234         /* make sure h/w will not generate any interrupt
1235          * before setting the invalid flag. */
1236         ath9k_hw_disable_interrupts(ah);
1237
1238         if (!(sc->sc_flags & SC_OP_INVALID)) {
1239                 ath_drain_all_txq(sc, false);
1240                 ath_stoprecv(sc);
1241                 ath9k_hw_phy_disable(ah);
1242         } else
1243                 sc->rx.rxlink = NULL;
1244
1245         if (sc->rx.frag) {
1246                 dev_kfree_skb_any(sc->rx.frag);
1247                 sc->rx.frag = NULL;
1248         }
1249
1250         /* disable HAL and put h/w to sleep */
1251         ath9k_hw_disable(ah);
1252
1253         spin_unlock_bh(&sc->sc_pcu_lock);
1254
1255         /* we can now sync irq and kill any running tasklets, since we already
1256          * disabled interrupts and not holding a spin lock */
1257         synchronize_irq(sc->irq);
1258         tasklet_kill(&sc->intr_tq);
1259         tasklet_kill(&sc->bcon_tasklet);
1260
1261         ath9k_ps_restore(sc);
1262
1263         sc->ps_idle = true;
1264         ath_radio_disable(sc, hw);
1265
1266         sc->sc_flags |= SC_OP_INVALID;
1267
1268         mutex_unlock(&sc->mutex);
1269
1270         ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n");
1271 }
1272
1273 bool ath9k_uses_beacons(int type)
1274 {
1275         switch (type) {
1276         case NL80211_IFTYPE_AP:
1277         case NL80211_IFTYPE_ADHOC:
1278         case NL80211_IFTYPE_MESH_POINT:
1279                 return true;
1280         default:
1281                 return false;
1282         }
1283 }
1284
1285 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1286                                  struct ieee80211_vif *vif)
1287 {
1288         struct ath_vif *avp = (void *)vif->drv_priv;
1289
1290         ath9k_set_beaconing_status(sc, false);
1291         ath_beacon_return(sc, avp);
1292         ath9k_set_beaconing_status(sc, true);
1293         sc->sc_flags &= ~SC_OP_BEACONS;
1294 }
1295
1296 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1297 {
1298         struct ath9k_vif_iter_data *iter_data = data;
1299         int i;
1300
1301         if (iter_data->hw_macaddr)
1302                 for (i = 0; i < ETH_ALEN; i++)
1303                         iter_data->mask[i] &=
1304                                 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1305
1306         switch (vif->type) {
1307         case NL80211_IFTYPE_AP:
1308                 iter_data->naps++;
1309                 break;
1310         case NL80211_IFTYPE_STATION:
1311                 iter_data->nstations++;
1312                 break;
1313         case NL80211_IFTYPE_ADHOC:
1314                 iter_data->nadhocs++;
1315                 break;
1316         case NL80211_IFTYPE_MESH_POINT:
1317                 iter_data->nmeshes++;
1318                 break;
1319         case NL80211_IFTYPE_WDS:
1320                 iter_data->nwds++;
1321                 break;
1322         default:
1323                 iter_data->nothers++;
1324                 break;
1325         }
1326 }
1327
1328 /* Called with sc->mutex held. */
1329 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1330                                struct ieee80211_vif *vif,
1331                                struct ath9k_vif_iter_data *iter_data)
1332 {
1333         struct ath_softc *sc = hw->priv;
1334         struct ath_hw *ah = sc->sc_ah;
1335         struct ath_common *common = ath9k_hw_common(ah);
1336
1337         /*
1338          * Use the hardware MAC address as reference, the hardware uses it
1339          * together with the BSSID mask when matching addresses.
1340          */
1341         memset(iter_data, 0, sizeof(*iter_data));
1342         iter_data->hw_macaddr = common->macaddr;
1343         memset(&iter_data->mask, 0xff, ETH_ALEN);
1344
1345         if (vif)
1346                 ath9k_vif_iter(iter_data, vif->addr, vif);
1347
1348         /* Get list of all active MAC addresses */
1349         ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1350                                                    iter_data);
1351 }
1352
1353 /* Called with sc->mutex held. */
1354 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1355                                           struct ieee80211_vif *vif)
1356 {
1357         struct ath_softc *sc = hw->priv;
1358         struct ath_hw *ah = sc->sc_ah;
1359         struct ath_common *common = ath9k_hw_common(ah);
1360         struct ath9k_vif_iter_data iter_data;
1361
1362         ath9k_calculate_iter_data(hw, vif, &iter_data);
1363
1364         /* Set BSSID mask. */
1365         memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1366         ath_hw_setbssidmask(common);
1367
1368         /* Set op-mode & TSF */
1369         if (iter_data.naps > 0) {
1370                 ath9k_hw_set_tsfadjust(ah, 1);
1371                 sc->sc_flags |= SC_OP_TSF_RESET;
1372                 ah->opmode = NL80211_IFTYPE_AP;
1373         } else {
1374                 ath9k_hw_set_tsfadjust(ah, 0);
1375                 sc->sc_flags &= ~SC_OP_TSF_RESET;
1376
1377                 if (iter_data.nmeshes)
1378                         ah->opmode = NL80211_IFTYPE_MESH_POINT;
1379                 else if (iter_data.nwds)
1380                         ah->opmode = NL80211_IFTYPE_AP;
1381                 else if (iter_data.nadhocs)
1382                         ah->opmode = NL80211_IFTYPE_ADHOC;
1383                 else
1384                         ah->opmode = NL80211_IFTYPE_STATION;
1385         }
1386
1387         /*
1388          * Enable MIB interrupts when there are hardware phy counters.
1389          */
1390         if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1391                 if (ah->config.enable_ani)
1392                         ah->imask |= ATH9K_INT_MIB;
1393                 ah->imask |= ATH9K_INT_TSFOOR;
1394         } else {
1395                 ah->imask &= ~ATH9K_INT_MIB;
1396                 ah->imask &= ~ATH9K_INT_TSFOOR;
1397         }
1398
1399         ath9k_hw_set_interrupts(ah, ah->imask);
1400
1401         /* Set up ANI */
1402         if (iter_data.naps > 0) {
1403                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1404
1405                 if (!common->disable_ani) {
1406                         sc->sc_flags |= SC_OP_ANI_RUN;
1407                         ath_start_ani(common);
1408                 }
1409
1410         } else {
1411                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1412                 del_timer_sync(&common->ani.timer);
1413         }
1414 }
1415
1416 /* Called with sc->mutex held, vif counts set up properly. */
1417 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1418                                    struct ieee80211_vif *vif)
1419 {
1420         struct ath_softc *sc = hw->priv;
1421
1422         ath9k_calculate_summary_state(hw, vif);
1423
1424         if (ath9k_uses_beacons(vif->type)) {
1425                 int error;
1426                 /* This may fail because upper levels do not have beacons
1427                  * properly configured yet.  That's OK, we assume it
1428                  * will be properly configured and then we will be notified
1429                  * in the info_changed method and set up beacons properly
1430                  * there.
1431                  */
1432                 ath9k_set_beaconing_status(sc, false);
1433                 error = ath_beacon_alloc(sc, vif);
1434                 if (!error)
1435                         ath_beacon_config(sc, vif);
1436                 ath9k_set_beaconing_status(sc, true);
1437         }
1438 }
1439
1440
1441 static int ath9k_add_interface(struct ieee80211_hw *hw,
1442                                struct ieee80211_vif *vif)
1443 {
1444         struct ath_softc *sc = hw->priv;
1445         struct ath_hw *ah = sc->sc_ah;
1446         struct ath_common *common = ath9k_hw_common(ah);
1447         int ret = 0;
1448
1449         ath9k_ps_wakeup(sc);
1450         mutex_lock(&sc->mutex);
1451
1452         switch (vif->type) {
1453         case NL80211_IFTYPE_STATION:
1454         case NL80211_IFTYPE_WDS:
1455         case NL80211_IFTYPE_ADHOC:
1456         case NL80211_IFTYPE_AP:
1457         case NL80211_IFTYPE_MESH_POINT:
1458                 break;
1459         default:
1460                 ath_err(common, "Interface type %d not yet supported\n",
1461                         vif->type);
1462                 ret = -EOPNOTSUPP;
1463                 goto out;
1464         }
1465
1466         if (ath9k_uses_beacons(vif->type)) {
1467                 if (sc->nbcnvifs >= ATH_BCBUF) {
1468                         ath_err(common, "Not enough beacon buffers when adding"
1469                                 " new interface of type: %i\n",
1470                                 vif->type);
1471                         ret = -ENOBUFS;
1472                         goto out;
1473                 }
1474         }
1475
1476         if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
1477             ((vif->type == NL80211_IFTYPE_ADHOC) &&
1478              sc->nvifs > 0)) {
1479                 ath_err(common, "Cannot create ADHOC interface when other"
1480                         " interfaces already exist.\n");
1481                 ret = -EINVAL;
1482                 goto out;
1483         }
1484
1485         ath_dbg(common, ATH_DBG_CONFIG,
1486                 "Attach a VIF of type: %d\n", vif->type);
1487
1488         sc->nvifs++;
1489
1490         ath9k_do_vif_add_setup(hw, vif);
1491 out:
1492         mutex_unlock(&sc->mutex);
1493         ath9k_ps_restore(sc);
1494         return ret;
1495 }
1496
1497 static int ath9k_change_interface(struct ieee80211_hw *hw,
1498                                   struct ieee80211_vif *vif,
1499                                   enum nl80211_iftype new_type,
1500                                   bool p2p)
1501 {
1502         struct ath_softc *sc = hw->priv;
1503         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1504         int ret = 0;
1505
1506         ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");
1507         mutex_lock(&sc->mutex);
1508         ath9k_ps_wakeup(sc);
1509
1510         /* See if new interface type is valid. */
1511         if ((new_type == NL80211_IFTYPE_ADHOC) &&
1512             (sc->nvifs > 1)) {
1513                 ath_err(common, "When using ADHOC, it must be the only"
1514                         " interface.\n");
1515                 ret = -EINVAL;
1516                 goto out;
1517         }
1518
1519         if (ath9k_uses_beacons(new_type) &&
1520             !ath9k_uses_beacons(vif->type)) {
1521                 if (sc->nbcnvifs >= ATH_BCBUF) {
1522                         ath_err(common, "No beacon slot available\n");
1523                         ret = -ENOBUFS;
1524                         goto out;
1525                 }
1526         }
1527
1528         /* Clean up old vif stuff */
1529         if (ath9k_uses_beacons(vif->type))
1530                 ath9k_reclaim_beacon(sc, vif);
1531
1532         /* Add new settings */
1533         vif->type = new_type;
1534         vif->p2p = p2p;
1535
1536         ath9k_do_vif_add_setup(hw, vif);
1537 out:
1538         ath9k_ps_restore(sc);
1539         mutex_unlock(&sc->mutex);
1540         return ret;
1541 }
1542
1543 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1544                                    struct ieee80211_vif *vif)
1545 {
1546         struct ath_softc *sc = hw->priv;
1547         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1548
1549         ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
1550
1551         ath9k_ps_wakeup(sc);
1552         mutex_lock(&sc->mutex);
1553
1554         sc->nvifs--;
1555
1556         /* Reclaim beacon resources */
1557         if (ath9k_uses_beacons(vif->type))
1558                 ath9k_reclaim_beacon(sc, vif);
1559
1560         ath9k_calculate_summary_state(hw, NULL);
1561
1562         mutex_unlock(&sc->mutex);
1563         ath9k_ps_restore(sc);
1564 }
1565
1566 static void ath9k_enable_ps(struct ath_softc *sc)
1567 {
1568         struct ath_hw *ah = sc->sc_ah;
1569
1570         sc->ps_enabled = true;
1571         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1572                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1573                         ah->imask |= ATH9K_INT_TIM_TIMER;
1574                         ath9k_hw_set_interrupts(ah, ah->imask);
1575                 }
1576                 ath9k_hw_setrxabort(ah, 1);
1577         }
1578 }
1579
1580 static void ath9k_disable_ps(struct ath_softc *sc)
1581 {
1582         struct ath_hw *ah = sc->sc_ah;
1583
1584         sc->ps_enabled = false;
1585         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1586         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1587                 ath9k_hw_setrxabort(ah, 0);
1588                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1589                                   PS_WAIT_FOR_CAB |
1590                                   PS_WAIT_FOR_PSPOLL_DATA |
1591                                   PS_WAIT_FOR_TX_ACK);
1592                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1593                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1594                         ath9k_hw_set_interrupts(ah, ah->imask);
1595                 }
1596         }
1597
1598 }
1599
1600 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1601 {
1602         struct ath_softc *sc = hw->priv;
1603         struct ath_hw *ah = sc->sc_ah;
1604         struct ath_common *common = ath9k_hw_common(ah);
1605         struct ieee80211_conf *conf = &hw->conf;
1606         bool disable_radio = false;
1607
1608         mutex_lock(&sc->mutex);
1609
1610         /*
1611          * Leave this as the first check because we need to turn on the
1612          * radio if it was disabled before prior to processing the rest
1613          * of the changes. Likewise we must only disable the radio towards
1614          * the end.
1615          */
1616         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1617                 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1618                 if (!sc->ps_idle) {
1619                         ath_radio_enable(sc, hw);
1620                         ath_dbg(common, ATH_DBG_CONFIG,
1621                                 "not-idle: enabling radio\n");
1622                 } else {
1623                         disable_radio = true;
1624                 }
1625         }
1626
1627         /*
1628          * We just prepare to enable PS. We have to wait until our AP has
1629          * ACK'd our null data frame to disable RX otherwise we'll ignore
1630          * those ACKs and end up retransmitting the same null data frames.
1631          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1632          */
1633         if (changed & IEEE80211_CONF_CHANGE_PS) {
1634                 unsigned long flags;
1635                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1636                 if (conf->flags & IEEE80211_CONF_PS)
1637                         ath9k_enable_ps(sc);
1638                 else
1639                         ath9k_disable_ps(sc);
1640                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1641         }
1642
1643         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1644                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1645                         ath_dbg(common, ATH_DBG_CONFIG,
1646                                 "Monitor mode is enabled\n");
1647                         sc->sc_ah->is_monitoring = true;
1648                 } else {
1649                         ath_dbg(common, ATH_DBG_CONFIG,
1650                                 "Monitor mode is disabled\n");
1651                         sc->sc_ah->is_monitoring = false;
1652                 }
1653         }
1654
1655         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1656                 struct ieee80211_channel *curchan = hw->conf.channel;
1657                 struct ath9k_channel old_chan;
1658                 int pos = curchan->hw_value;
1659                 int old_pos = -1;
1660                 unsigned long flags;
1661
1662                 if (ah->curchan)
1663                         old_pos = ah->curchan - &ah->channels[0];
1664
1665                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1666                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1667                 else
1668                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1669
1670                 ath_dbg(common, ATH_DBG_CONFIG,
1671                         "Set channel: %d MHz type: %d\n",
1672                         curchan->center_freq, conf->channel_type);
1673
1674                 /* update survey stats for the old channel before switching */
1675                 spin_lock_irqsave(&common->cc_lock, flags);
1676                 ath_update_survey_stats(sc);
1677                 spin_unlock_irqrestore(&common->cc_lock, flags);
1678
1679                 /*
1680                  * Preserve the current channel values, before updating
1681                  * the same channel
1682                  */
1683                 if (old_pos == pos) {
1684                         memcpy(&old_chan, &sc->sc_ah->channels[pos],
1685                                 sizeof(struct ath9k_channel));
1686                         ah->curchan = &old_chan;
1687                 }
1688
1689                 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1690                                           curchan, conf->channel_type);
1691
1692                 /*
1693                  * If the operating channel changes, change the survey in-use flags
1694                  * along with it.
1695                  * Reset the survey data for the new channel, unless we're switching
1696                  * back to the operating channel from an off-channel operation.
1697                  */
1698                 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1699                     sc->cur_survey != &sc->survey[pos]) {
1700
1701                         if (sc->cur_survey)
1702                                 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1703
1704                         sc->cur_survey = &sc->survey[pos];
1705
1706                         memset(sc->cur_survey, 0, sizeof(struct survey_info));
1707                         sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1708                 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1709                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1710                 }
1711
1712                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1713                         ath_err(common, "Unable to set channel\n");
1714                         mutex_unlock(&sc->mutex);
1715                         return -EINVAL;
1716                 }
1717
1718                 /*
1719                  * The most recent snapshot of channel->noisefloor for the old
1720                  * channel is only available after the hardware reset. Copy it to
1721                  * the survey stats now.
1722                  */
1723                 if (old_pos >= 0)
1724                         ath_update_survey_nf(sc, old_pos);
1725         }
1726
1727         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1728                 ath_dbg(common, ATH_DBG_CONFIG,
1729                         "Set power: %d\n", conf->power_level);
1730                 sc->config.txpowlimit = 2 * conf->power_level;
1731                 ath9k_ps_wakeup(sc);
1732                 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1733                                        sc->config.txpowlimit, &sc->curtxpow);
1734                 ath9k_ps_restore(sc);
1735         }
1736
1737         if (disable_radio) {
1738                 ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1739                 ath_radio_disable(sc, hw);
1740         }
1741
1742         mutex_unlock(&sc->mutex);
1743
1744         return 0;
1745 }
1746
1747 #define SUPPORTED_FILTERS                       \
1748         (FIF_PROMISC_IN_BSS |                   \
1749         FIF_ALLMULTI |                          \
1750         FIF_CONTROL |                           \
1751         FIF_PSPOLL |                            \
1752         FIF_OTHER_BSS |                         \
1753         FIF_BCN_PRBRESP_PROMISC |               \
1754         FIF_PROBE_REQ |                         \
1755         FIF_FCSFAIL)
1756
1757 /* FIXME: sc->sc_full_reset ? */
1758 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1759                                    unsigned int changed_flags,
1760                                    unsigned int *total_flags,
1761                                    u64 multicast)
1762 {
1763         struct ath_softc *sc = hw->priv;
1764         u32 rfilt;
1765
1766         changed_flags &= SUPPORTED_FILTERS;
1767         *total_flags &= SUPPORTED_FILTERS;
1768
1769         sc->rx.rxfilter = *total_flags;
1770         ath9k_ps_wakeup(sc);
1771         rfilt = ath_calcrxfilter(sc);
1772         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1773         ath9k_ps_restore(sc);
1774
1775         ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1776                 "Set HW RX filter: 0x%x\n", rfilt);
1777 }
1778
1779 static int ath9k_sta_add(struct ieee80211_hw *hw,
1780                          struct ieee80211_vif *vif,
1781                          struct ieee80211_sta *sta)
1782 {
1783         struct ath_softc *sc = hw->priv;
1784         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1785         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1786         struct ieee80211_key_conf ps_key = { };
1787
1788         ath_node_attach(sc, sta);
1789
1790         if (vif->type != NL80211_IFTYPE_AP &&
1791             vif->type != NL80211_IFTYPE_AP_VLAN)
1792                 return 0;
1793
1794         an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1795
1796         return 0;
1797 }
1798
1799 static void ath9k_del_ps_key(struct ath_softc *sc,
1800                              struct ieee80211_vif *vif,
1801                              struct ieee80211_sta *sta)
1802 {
1803         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1804         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1805         struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1806
1807         if (!an->ps_key)
1808             return;
1809
1810         ath_key_delete(common, &ps_key);
1811 }
1812
1813 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1814                             struct ieee80211_vif *vif,
1815                             struct ieee80211_sta *sta)
1816 {
1817         struct ath_softc *sc = hw->priv;
1818
1819         ath9k_del_ps_key(sc, vif, sta);
1820         ath_node_detach(sc, sta);
1821
1822         return 0;
1823 }
1824
1825 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1826                          struct ieee80211_vif *vif,
1827                          enum sta_notify_cmd cmd,
1828                          struct ieee80211_sta *sta)
1829 {
1830         struct ath_softc *sc = hw->priv;
1831         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1832
1833         switch (cmd) {
1834         case STA_NOTIFY_SLEEP:
1835                 an->sleeping = true;
1836                 ath_tx_aggr_sleep(sta, sc, an);
1837                 break;
1838         case STA_NOTIFY_AWAKE:
1839                 an->sleeping = false;
1840                 ath_tx_aggr_wakeup(sc, an);
1841                 break;
1842         }
1843 }
1844
1845 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1846                          struct ieee80211_vif *vif, u16 queue,
1847                          const struct ieee80211_tx_queue_params *params)
1848 {
1849         struct ath_softc *sc = hw->priv;
1850         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1851         struct ath_txq *txq;
1852         struct ath9k_tx_queue_info qi;
1853         int ret = 0;
1854
1855         if (queue >= WME_NUM_AC)
1856                 return 0;
1857
1858         txq = sc->tx.txq_map[queue];
1859
1860         ath9k_ps_wakeup(sc);
1861         mutex_lock(&sc->mutex);
1862
1863         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1864
1865         qi.tqi_aifs = params->aifs;
1866         qi.tqi_cwmin = params->cw_min;
1867         qi.tqi_cwmax = params->cw_max;
1868         qi.tqi_burstTime = params->txop;
1869
1870         ath_dbg(common, ATH_DBG_CONFIG,
1871                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1872                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1873                 params->cw_max, params->txop);
1874
1875         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1876         if (ret)
1877                 ath_err(common, "TXQ Update failed\n");
1878
1879         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1880                 if (queue == WME_AC_BE && !ret)
1881                         ath_beaconq_config(sc);
1882
1883         mutex_unlock(&sc->mutex);
1884         ath9k_ps_restore(sc);
1885
1886         return ret;
1887 }
1888
1889 static int ath9k_set_key(struct ieee80211_hw *hw,
1890                          enum set_key_cmd cmd,
1891                          struct ieee80211_vif *vif,
1892                          struct ieee80211_sta *sta,
1893                          struct ieee80211_key_conf *key)
1894 {
1895         struct ath_softc *sc = hw->priv;
1896         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1897         int ret = 0;
1898
1899         if (ath9k_modparam_nohwcrypt)
1900                 return -ENOSPC;
1901
1902         if (vif->type == NL80211_IFTYPE_ADHOC &&
1903             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1904              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1905             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1906                 /*
1907                  * For now, disable hw crypto for the RSN IBSS group keys. This
1908                  * could be optimized in the future to use a modified key cache
1909                  * design to support per-STA RX GTK, but until that gets
1910                  * implemented, use of software crypto for group addressed
1911                  * frames is a acceptable to allow RSN IBSS to be used.
1912                  */
1913                 return -EOPNOTSUPP;
1914         }
1915
1916         mutex_lock(&sc->mutex);
1917         ath9k_ps_wakeup(sc);
1918         ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");
1919
1920         switch (cmd) {
1921         case SET_KEY:
1922                 if (sta)
1923                         ath9k_del_ps_key(sc, vif, sta);
1924
1925                 ret = ath_key_config(common, vif, sta, key);
1926                 if (ret >= 0) {
1927                         key->hw_key_idx = ret;
1928                         /* push IV and Michael MIC generation to stack */
1929                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1930                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1931                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1932                         if (sc->sc_ah->sw_mgmt_crypto &&
1933                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1934                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1935                         ret = 0;
1936                 }
1937                 break;
1938         case DISABLE_KEY:
1939                 ath_key_delete(common, key);
1940                 break;
1941         default:
1942                 ret = -EINVAL;
1943         }
1944
1945         ath9k_ps_restore(sc);
1946         mutex_unlock(&sc->mutex);
1947
1948         return ret;
1949 }
1950 static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1951 {
1952         struct ath_softc *sc = data;
1953         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1954         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1955         struct ath_vif *avp = (void *)vif->drv_priv;
1956
1957         /*
1958          * Skip iteration if primary station vif's bss info
1959          * was not changed
1960          */
1961         if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1962                 return;
1963
1964         if (bss_conf->assoc) {
1965                 sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1966                 avp->primary_sta_vif = true;
1967                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1968                 common->curaid = bss_conf->aid;
1969                 ath9k_hw_write_associd(sc->sc_ah);
1970                 ath_dbg(common, ATH_DBG_CONFIG,
1971                                 "Bss Info ASSOC %d, bssid: %pM\n",
1972                                 bss_conf->aid, common->curbssid);
1973                 ath_beacon_config(sc, vif);
1974                 /*
1975                  * Request a re-configuration of Beacon related timers
1976                  * on the receipt of the first Beacon frame (i.e.,
1977                  * after time sync with the AP).
1978                  */
1979                 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1980                 /* Reset rssi stats */
1981                 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
1982                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1983
1984                 if (!common->disable_ani) {
1985                         sc->sc_flags |= SC_OP_ANI_RUN;
1986                         ath_start_ani(common);
1987                 }
1988
1989         }
1990 }
1991
1992 static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
1993 {
1994         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1995         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1996         struct ath_vif *avp = (void *)vif->drv_priv;
1997
1998         if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1999                 return;
2000
2001         /* Reconfigure bss info */
2002         if (avp->primary_sta_vif && !bss_conf->assoc) {
2003                 ath_dbg(common, ATH_DBG_CONFIG,
2004                         "Bss Info DISASSOC %d, bssid %pM\n",
2005                         common->curaid, common->curbssid);
2006                 sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
2007                 avp->primary_sta_vif = false;
2008                 memset(common->curbssid, 0, ETH_ALEN);
2009                 common->curaid = 0;
2010         }
2011
2012         ieee80211_iterate_active_interfaces_atomic(
2013                         sc->hw, ath9k_bss_iter, sc);
2014
2015         /*
2016          * None of station vifs are associated.
2017          * Clear bssid & aid
2018          */
2019         if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
2020                 ath9k_hw_write_associd(sc->sc_ah);
2021                 /* Stop ANI */
2022                 sc->sc_flags &= ~SC_OP_ANI_RUN;
2023                 del_timer_sync(&common->ani.timer);
2024                 memset(&sc->caldata, 0, sizeof(sc->caldata));
2025         }
2026 }
2027
2028 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
2029                                    struct ieee80211_vif *vif,
2030                                    struct ieee80211_bss_conf *bss_conf,
2031                                    u32 changed)
2032 {
2033         struct ath_softc *sc = hw->priv;
2034         struct ath_hw *ah = sc->sc_ah;
2035         struct ath_common *common = ath9k_hw_common(ah);
2036         struct ath_vif *avp = (void *)vif->drv_priv;
2037         int slottime;
2038         int error;
2039
2040         ath9k_ps_wakeup(sc);
2041         mutex_lock(&sc->mutex);
2042
2043         if (changed & BSS_CHANGED_BSSID) {
2044                 ath9k_config_bss(sc, vif);
2045
2046                 ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n",
2047                         common->curbssid, common->curaid);
2048         }
2049
2050         if (changed & BSS_CHANGED_IBSS) {
2051                 /* There can be only one vif available */
2052                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2053                 common->curaid = bss_conf->aid;
2054                 ath9k_hw_write_associd(sc->sc_ah);
2055
2056                 if (bss_conf->ibss_joined) {
2057                         sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2058
2059                         if (!common->disable_ani) {
2060                                 sc->sc_flags |= SC_OP_ANI_RUN;
2061                                 ath_start_ani(common);
2062                         }
2063
2064                 } else {
2065                         sc->sc_flags &= ~SC_OP_ANI_RUN;
2066                         del_timer_sync(&common->ani.timer);
2067                 }
2068         }
2069
2070         /* Enable transmission of beacons (AP, IBSS, MESH) */
2071         if ((changed & BSS_CHANGED_BEACON) ||
2072             ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
2073                 ath9k_set_beaconing_status(sc, false);
2074                 error = ath_beacon_alloc(sc, vif);
2075                 if (!error)
2076                         ath_beacon_config(sc, vif);
2077                 ath9k_set_beaconing_status(sc, true);
2078         }
2079
2080         if (changed & BSS_CHANGED_ERP_SLOT) {
2081                 if (bss_conf->use_short_slot)
2082                         slottime = 9;
2083                 else
2084                         slottime = 20;
2085                 if (vif->type == NL80211_IFTYPE_AP) {
2086                         /*
2087                          * Defer update, so that connected stations can adjust
2088                          * their settings at the same time.
2089                          * See beacon.c for more details
2090                          */
2091                         sc->beacon.slottime = slottime;
2092                         sc->beacon.updateslot = UPDATE;
2093                 } else {
2094                         ah->slottime = slottime;
2095                         ath9k_hw_init_global_settings(ah);
2096                 }
2097         }
2098
2099         /* Disable transmission of beacons */
2100         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
2101             !bss_conf->enable_beacon) {
2102                 ath9k_set_beaconing_status(sc, false);
2103                 avp->is_bslot_active = false;
2104                 ath9k_set_beaconing_status(sc, true);
2105         }
2106
2107         if (changed & BSS_CHANGED_BEACON_INT) {
2108                 /*
2109                  * In case of AP mode, the HW TSF has to be reset
2110                  * when the beacon interval changes.
2111                  */
2112                 if (vif->type == NL80211_IFTYPE_AP) {
2113                         sc->sc_flags |= SC_OP_TSF_RESET;
2114                         ath9k_set_beaconing_status(sc, false);
2115                         error = ath_beacon_alloc(sc, vif);
2116                         if (!error)
2117                                 ath_beacon_config(sc, vif);
2118                         ath9k_set_beaconing_status(sc, true);
2119                 } else
2120                         ath_beacon_config(sc, vif);
2121         }
2122
2123         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
2124                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
2125                         bss_conf->use_short_preamble);
2126                 if (bss_conf->use_short_preamble)
2127                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
2128                 else
2129                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2130         }
2131
2132         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2133                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
2134                         bss_conf->use_cts_prot);
2135                 if (bss_conf->use_cts_prot &&
2136                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2137                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2138                 else
2139                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2140         }
2141
2142         mutex_unlock(&sc->mutex);
2143         ath9k_ps_restore(sc);
2144 }
2145
2146 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2147 {
2148         struct ath_softc *sc = hw->priv;
2149         u64 tsf;
2150
2151         mutex_lock(&sc->mutex);
2152         ath9k_ps_wakeup(sc);
2153         tsf = ath9k_hw_gettsf64(sc->sc_ah);
2154         ath9k_ps_restore(sc);
2155         mutex_unlock(&sc->mutex);
2156
2157         return tsf;
2158 }
2159
2160 static void ath9k_set_tsf(struct ieee80211_hw *hw,
2161                           struct ieee80211_vif *vif,
2162                           u64 tsf)
2163 {
2164         struct ath_softc *sc = hw->priv;
2165
2166         mutex_lock(&sc->mutex);
2167         ath9k_ps_wakeup(sc);
2168         ath9k_hw_settsf64(sc->sc_ah, tsf);
2169         ath9k_ps_restore(sc);
2170         mutex_unlock(&sc->mutex);
2171 }
2172
2173 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2174 {
2175         struct ath_softc *sc = hw->priv;
2176
2177         mutex_lock(&sc->mutex);
2178
2179         ath9k_ps_wakeup(sc);
2180         ath9k_hw_reset_tsf(sc->sc_ah);
2181         ath9k_ps_restore(sc);
2182
2183         mutex_unlock(&sc->mutex);
2184 }
2185
2186 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2187                               struct ieee80211_vif *vif,
2188                               enum ieee80211_ampdu_mlme_action action,
2189                               struct ieee80211_sta *sta,
2190                               u16 tid, u16 *ssn, u8 buf_size)
2191 {
2192         struct ath_softc *sc = hw->priv;
2193         int ret = 0;
2194
2195         local_bh_disable();
2196
2197         switch (action) {
2198         case IEEE80211_AMPDU_RX_START:
2199                 if (!(sc->sc_flags & SC_OP_RXAGGR))
2200                         ret = -ENOTSUPP;
2201                 break;
2202         case IEEE80211_AMPDU_RX_STOP:
2203                 break;
2204         case IEEE80211_AMPDU_TX_START:
2205                 if (!(sc->sc_flags & SC_OP_TXAGGR))
2206                         return -EOPNOTSUPP;
2207
2208                 ath9k_ps_wakeup(sc);
2209                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2210                 if (!ret)
2211                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2212                 ath9k_ps_restore(sc);
2213                 break;
2214         case IEEE80211_AMPDU_TX_STOP:
2215                 ath9k_ps_wakeup(sc);
2216                 ath_tx_aggr_stop(sc, sta, tid);
2217                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2218                 ath9k_ps_restore(sc);
2219                 break;
2220         case IEEE80211_AMPDU_TX_OPERATIONAL:
2221                 ath9k_ps_wakeup(sc);
2222                 ath_tx_aggr_resume(sc, sta, tid);
2223                 ath9k_ps_restore(sc);
2224                 break;
2225         default:
2226                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2227         }
2228
2229         local_bh_enable();
2230
2231         return ret;
2232 }
2233
2234 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2235                              struct survey_info *survey)
2236 {
2237         struct ath_softc *sc = hw->priv;
2238         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2239         struct ieee80211_supported_band *sband;
2240         struct ieee80211_channel *chan;
2241         unsigned long flags;
2242         int pos;
2243
2244         spin_lock_irqsave(&common->cc_lock, flags);
2245         if (idx == 0)
2246                 ath_update_survey_stats(sc);
2247
2248         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2249         if (sband && idx >= sband->n_channels) {
2250                 idx -= sband->n_channels;
2251                 sband = NULL;
2252         }
2253
2254         if (!sband)
2255                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2256
2257         if (!sband || idx >= sband->n_channels) {
2258                 spin_unlock_irqrestore(&common->cc_lock, flags);
2259                 return -ENOENT;
2260         }
2261
2262         chan = &sband->channels[idx];
2263         pos = chan->hw_value;
2264         memcpy(survey, &sc->survey[pos], sizeof(*survey));
2265         survey->channel = chan;
2266         spin_unlock_irqrestore(&common->cc_lock, flags);
2267
2268         return 0;
2269 }
2270
2271 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2272 {
2273         struct ath_softc *sc = hw->priv;
2274         struct ath_hw *ah = sc->sc_ah;
2275
2276         mutex_lock(&sc->mutex);
2277         ah->coverage_class = coverage_class;
2278
2279         ath9k_ps_wakeup(sc);
2280         ath9k_hw_init_global_settings(ah);
2281         ath9k_ps_restore(sc);
2282
2283         mutex_unlock(&sc->mutex);
2284 }
2285
2286 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
2287 {
2288         struct ath_softc *sc = hw->priv;
2289         struct ath_hw *ah = sc->sc_ah;
2290         struct ath_common *common = ath9k_hw_common(ah);
2291         int timeout = 200; /* ms */
2292         int i, j;
2293         bool drain_txq;
2294
2295         mutex_lock(&sc->mutex);
2296         cancel_delayed_work_sync(&sc->tx_complete_work);
2297
2298         if (ah->ah_flags & AH_UNPLUGGED) {
2299                 ath_dbg(common, ATH_DBG_ANY, "Device has been unplugged!\n");
2300                 mutex_unlock(&sc->mutex);
2301                 return;
2302         }
2303
2304         if (sc->sc_flags & SC_OP_INVALID) {
2305                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
2306                 mutex_unlock(&sc->mutex);
2307                 return;
2308         }
2309
2310         if (drop)
2311                 timeout = 1;
2312
2313         for (j = 0; j < timeout; j++) {
2314                 bool npend = false;
2315
2316                 if (j)
2317                         usleep_range(1000, 2000);
2318
2319                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2320                         if (!ATH_TXQ_SETUP(sc, i))
2321                                 continue;
2322
2323                         npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2324
2325                         if (npend)
2326                                 break;
2327                 }
2328
2329                 if (!npend)
2330                     goto out;
2331         }
2332
2333         ath9k_ps_wakeup(sc);
2334         spin_lock_bh(&sc->sc_pcu_lock);
2335         drain_txq = ath_drain_all_txq(sc, false);
2336         spin_unlock_bh(&sc->sc_pcu_lock);
2337
2338         if (!drain_txq)
2339                 ath_reset(sc, false);
2340
2341         ath9k_ps_restore(sc);
2342         ieee80211_wake_queues(hw);
2343
2344 out:
2345         ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2346         mutex_unlock(&sc->mutex);
2347 }
2348
2349 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2350 {
2351         struct ath_softc *sc = hw->priv;
2352         int i;
2353
2354         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2355                 if (!ATH_TXQ_SETUP(sc, i))
2356                         continue;
2357
2358                 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2359                         return true;
2360         }
2361         return false;
2362 }
2363
2364 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2365 {
2366         struct ath_softc *sc = hw->priv;
2367         struct ath_hw *ah = sc->sc_ah;
2368         struct ieee80211_vif *vif;
2369         struct ath_vif *avp;
2370         struct ath_buf *bf;
2371         struct ath_tx_status ts;
2372         int status;
2373
2374         vif = sc->beacon.bslot[0];
2375         if (!vif)
2376                 return 0;
2377
2378         avp = (void *)vif->drv_priv;
2379         if (!avp->is_bslot_active)
2380                 return 0;
2381
2382         if (!sc->beacon.tx_processed) {
2383                 tasklet_disable(&sc->bcon_tasklet);
2384
2385                 bf = avp->av_bcbuf;
2386                 if (!bf || !bf->bf_mpdu)
2387                         goto skip;
2388
2389                 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2390                 if (status == -EINPROGRESS)
2391                         goto skip;
2392
2393                 sc->beacon.tx_processed = true;
2394                 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2395
2396 skip:
2397                 tasklet_enable(&sc->bcon_tasklet);
2398         }
2399
2400         return sc->beacon.tx_last;
2401 }
2402
2403 static int ath9k_get_stats(struct ieee80211_hw *hw,
2404                            struct ieee80211_low_level_stats *stats)
2405 {
2406         struct ath_softc *sc = hw->priv;
2407         struct ath_hw *ah = sc->sc_ah;
2408         struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2409
2410         stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2411         stats->dot11RTSFailureCount = mib_stats->rts_bad;
2412         stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2413         stats->dot11RTSSuccessCount = mib_stats->rts_good;
2414         return 0;
2415 }
2416
2417 static u32 fill_chainmask(u32 cap, u32 new)
2418 {
2419         u32 filled = 0;
2420         int i;
2421
2422         for (i = 0; cap && new; i++, cap >>= 1) {
2423                 if (!(cap & BIT(0)))
2424                         continue;
2425
2426                 if (new & BIT(0))
2427                         filled |= BIT(i);
2428
2429                 new >>= 1;
2430         }
2431
2432         return filled;
2433 }
2434
2435 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2436 {
2437         struct ath_softc *sc = hw->priv;
2438         struct ath_hw *ah = sc->sc_ah;
2439
2440         if (!rx_ant || !tx_ant)
2441                 return -EINVAL;
2442
2443         sc->ant_rx = rx_ant;
2444         sc->ant_tx = tx_ant;
2445
2446         if (ah->caps.rx_chainmask == 1)
2447                 return 0;
2448
2449         /* AR9100 runs into calibration issues if not all rx chains are enabled */
2450         if (AR_SREV_9100(ah))
2451                 ah->rxchainmask = 0x7;
2452         else
2453                 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2454
2455         ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2456         ath9k_reload_chainmask_settings(sc);
2457
2458         return 0;
2459 }
2460
2461 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2462 {
2463         struct ath_softc *sc = hw->priv;
2464
2465         *tx_ant = sc->ant_tx;
2466         *rx_ant = sc->ant_rx;
2467         return 0;
2468 }
2469
2470 struct ieee80211_ops ath9k_ops = {
2471         .tx                 = ath9k_tx,
2472         .start              = ath9k_start,
2473         .stop               = ath9k_stop,
2474         .add_interface      = ath9k_add_interface,
2475         .change_interface   = ath9k_change_interface,
2476         .remove_interface   = ath9k_remove_interface,
2477         .config             = ath9k_config,
2478         .configure_filter   = ath9k_configure_filter,
2479         .sta_add            = ath9k_sta_add,
2480         .sta_remove         = ath9k_sta_remove,
2481         .sta_notify         = ath9k_sta_notify,
2482         .conf_tx            = ath9k_conf_tx,
2483         .bss_info_changed   = ath9k_bss_info_changed,
2484         .set_key            = ath9k_set_key,
2485         .get_tsf            = ath9k_get_tsf,
2486         .set_tsf            = ath9k_set_tsf,
2487         .reset_tsf          = ath9k_reset_tsf,
2488         .ampdu_action       = ath9k_ampdu_action,
2489         .get_survey         = ath9k_get_survey,
2490         .rfkill_poll        = ath9k_rfkill_poll_state,
2491         .set_coverage_class = ath9k_set_coverage_class,
2492         .flush              = ath9k_flush,
2493         .tx_frames_pending  = ath9k_tx_frames_pending,
2494         .tx_last_beacon     = ath9k_tx_last_beacon,
2495         .get_stats          = ath9k_get_stats,
2496         .set_antenna        = ath9k_set_antenna,
2497         .get_antenna        = ath9k_get_antenna,
2498 };