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);
 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 ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && 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 #ifdef CONFIG_ATH9K_DEBUGFS
 683                 enum ath_reset_type type;
 684
 685                 if (status & ATH9K_INT_FATAL)
 686                         type = RESET_TYPE_FATAL_INT;
 687                 else
 688                         type = RESET_TYPE_BB_WATCHDOG;
 689
 690                 RESET_STAT_INC(sc, type);
 691 #endif
 692                 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 693                 goto out;
 694         }
 695
 696         /*
 697          * Only run the baseband hang check if beacons stop working in AP or
 698          * IBSS mode, because it has a high false positive rate. For station
 699          * mode it should not be necessary, since the upper layers will detect
 700          * this through a beacon miss automatically and the following channel
 701          * change will trigger a hardware reset anyway
 702          */
 703         if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 &&
 704             !ath9k_hw_check_alive(ah))
 705                 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
 706
 707         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 708                 /*
 709                  * TSF sync does not look correct; remain awake to sync with
 710                  * the next Beacon.
 711                  */
 712                 ath_dbg(common, ATH_DBG_PS,
 713                         "TSFOOR - Sync with next Beacon\n");
 714                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
 715         }
 716
 717         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 718                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
 719                           ATH9K_INT_RXORN);
 720         else
 721                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 722
 723         if (status & rxmask) {
 724                 /* Check for high priority Rx first */
 725                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 726                     (status & ATH9K_INT_RXHP))
 727                         ath_rx_tasklet(sc, 0, true);
 728
 729                 ath_rx_tasklet(sc, 0, false);
 730         }
 731
 732         if (status & ATH9K_INT_TX) {
 733                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 734                         ath_tx_edma_tasklet(sc);
 735                 else
 736                         ath_tx_tasklet(sc);
 737         }
 738
 739         if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
 740                 if (status & ATH9K_INT_GENTIMER)
 741                         ath_gen_timer_isr(sc->sc_ah);
 742
 743 out:
 744         /* re-enable hardware interrupt */
 745         ath9k_hw_enable_interrupts(ah);
 746
 747         spin_unlock(&sc->sc_pcu_lock);
 748         ath9k_ps_restore(sc);
 749 }
 750
 751 irqreturn_t ath_isr(int irq, void *dev)
 752 {
 753 #define SCHED_INTR (                            \
 754                 ATH9K_INT_FATAL |               \
 755                 ATH9K_INT_BB_WATCHDOG |         \
 756                 ATH9K_INT_RXORN |               \
 757                 ATH9K_INT_RXEOL |               \
 758                 ATH9K_INT_RX |                  \
 759                 ATH9K_INT_RXLP |                \
 760                 ATH9K_INT_RXHP |                \
 761                 ATH9K_INT_TX |                  \
 762                 ATH9K_INT_BMISS |               \
 763                 ATH9K_INT_CST |                 \
 764                 ATH9K_INT_TSFOOR |              \
 765                 ATH9K_INT_GENTIMER)
 766
 767         struct ath_softc *sc = dev;
 768         struct ath_hw *ah = sc->sc_ah;
 769         struct ath_common *common = ath9k_hw_common(ah);
 770         enum ath9k_int status;
 771         bool sched = false;
 772
 773         /*
 774          * The hardware is not ready/present, don't
 775          * touch anything. Note this can happen early
 776          * on if the IRQ is shared.
 777          */
 778         if (sc->sc_flags & SC_OP_INVALID)
 779                 return IRQ_NONE;
 780
 781
 782         /* shared irq, not for us */
 783
 784         if (!ath9k_hw_intrpend(ah))
 785                 return IRQ_NONE;
 786
 787         /*
 788          * Figure out the reason(s) for the interrupt.  Note
 789          * that the hal returns a pseudo-ISR that may include
 790          * bits we haven't explicitly enabled so we mask the
 791          * value to insure we only process bits we requested.
 792          */
 793         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
 794         status &= ah->imask;    /* discard unasked-for bits */
 795
 796         /*
 797          * If there are no status bits set, then this interrupt was not
 798          * for me (should have been caught above).
 799          */
 800         if (!status)
 801                 return IRQ_NONE;
 802
 803         /* Cache the status */
 804         sc->intrstatus = status;
 805
 806         if (status & SCHED_INTR)
 807                 sched = true;
 808
 809         /*
 810          * If a FATAL or RXORN interrupt is received, we have to reset the
 811          * chip immediately.
 812          */
 813         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
 814             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
 815                 goto chip_reset;
 816
 817         if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 818             (status & ATH9K_INT_BB_WATCHDOG)) {
 819
 820                 spin_lock(&common->cc_lock);
 821                 ath_hw_cycle_counters_update(common);
 822                 ar9003_hw_bb_watchdog_dbg_info(ah);
 823                 spin_unlock(&common->cc_lock);
 824
 825                 goto chip_reset;
 826         }
 827
 828         if (status & ATH9K_INT_SWBA)
 829                 tasklet_schedule(&sc->bcon_tasklet);
 830
 831         if (status & ATH9K_INT_TXURN)
 832                 ath9k_hw_updatetxtriglevel(ah, true);
 833
 834         if (status & ATH9K_INT_RXEOL) {
 835                 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 836                 ath9k_hw_set_interrupts(ah);
 837         }
 838
 839         if (status & ATH9K_INT_MIB) {
 840                 /*
 841                  * Disable interrupts until we service the MIB
 842                  * interrupt; otherwise it will continue to
 843                  * fire.
 844                  */
 845                 ath9k_hw_disable_interrupts(ah);
 846                 /*
 847                  * Let the hal handle the event. We assume
 848                  * it will clear whatever condition caused
 849                  * the interrupt.
 850                  */
 851                 spin_lock(&common->cc_lock);
 852                 ath9k_hw_proc_mib_event(ah);
 853                 spin_unlock(&common->cc_lock);
 854                 ath9k_hw_enable_interrupts(ah);
 855         }
 856
 857         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 858                 if (status & ATH9K_INT_TIM_TIMER) {
 859                         if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
 860                                 goto chip_reset;
 861                         /* Clear RxAbort bit so that we can
 862                          * receive frames */
 863                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
 864                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 865                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
 866                 }
 867
 868 chip_reset:
 869
 870         ath_debug_stat_interrupt(sc, status);
 871
 872         if (sched) {
 873                 /* turn off every interrupt */
 874                 ath9k_hw_disable_interrupts(ah);
 875                 tasklet_schedule(&sc->intr_tq);
 876         }
 877
 878         return IRQ_HANDLED;
 879
 880 #undef SCHED_INTR
 881 }
 882
 883 static void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
 884 {
 885         struct ath_hw *ah = sc->sc_ah;
 886         struct ath_common *common = ath9k_hw_common(ah);
 887         struct ieee80211_channel *channel = hw->conf.channel;
 888         int r;
 889
 890         ath9k_ps_wakeup(sc);
 891         spin_lock_bh(&sc->sc_pcu_lock);
 892         atomic_set(&ah->intr_ref_cnt, -1);
 893
 894         ath9k_hw_configpcipowersave(ah, false);
 895
 896         if (!ah->curchan)
 897                 ah->curchan = ath9k_cmn_get_curchannel(sc->hw, ah);
 898
 899         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 900         if (r) {
 901                 ath_err(common,
 902                         "Unable to reset channel (%u MHz), reset status %d\n",
 903                         channel->center_freq, r);
 904         }
 905
 906         ath_complete_reset(sc, true);
 907
 908         /* Enable LED */
 909         ath9k_hw_cfg_output(ah, ah->led_pin,
 910                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 911         ath9k_hw_set_gpio(ah, ah->led_pin, 0);
 912
 913         spin_unlock_bh(&sc->sc_pcu_lock);
 914
 915         ath9k_ps_restore(sc);
 916 }
 917
 918 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
 919 {
 920         struct ath_hw *ah = sc->sc_ah;
 921         struct ieee80211_channel *channel = hw->conf.channel;
 922         int r;
 923
 924         ath9k_ps_wakeup(sc);
 925
 926         ath_cancel_work(sc);
 927
 928         spin_lock_bh(&sc->sc_pcu_lock);
 929
 930         /*
 931          * Keep the LED on when the radio is disabled
 932          * during idle unassociated state.
 933          */
 934         if (!sc->ps_idle) {
 935                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
 936                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
 937         }
 938
 939         ath_prepare_reset(sc, false, true);
 940
 941         if (!ah->curchan)
 942                 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
 943
 944         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 945         if (r) {
 946                 ath_err(ath9k_hw_common(sc->sc_ah),
 947                         "Unable to reset channel (%u MHz), reset status %d\n",
 948                         channel->center_freq, r);
 949         }
 950
 951         ath9k_hw_phy_disable(ah);
 952
 953         ath9k_hw_configpcipowersave(ah, true);
 954
 955         spin_unlock_bh(&sc->sc_pcu_lock);
 956         ath9k_ps_restore(sc);
 957 }
 958
 959 static int ath_reset(struct ath_softc *sc, bool retry_tx)
 960 {
 961         int r;
 962
 963         ath9k_ps_wakeup(sc);
 964
 965         r = ath_reset_internal(sc, NULL, retry_tx);
 966
 967         if (retry_tx) {
 968                 int i;
 969                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
 970                         if (ATH_TXQ_SETUP(sc, i)) {
 971                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
 972                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
 973                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
 974                         }
 975                 }
 976         }
 977
 978         ath9k_ps_restore(sc);
 979
 980         return r;
 981 }
 982
 983 void ath_reset_work(struct work_struct *work)
 984 {
 985         struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
 986
 987         ath_reset(sc, true);
 988 }
 989
 990 void ath_hw_check(struct work_struct *work)
 991 {
 992         struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
 993         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 994         unsigned long flags;
 995         int busy;
 996
 997         ath9k_ps_wakeup(sc);
 998         if (ath9k_hw_check_alive(sc->sc_ah))
 999                 goto out;
1000
1001         spin_lock_irqsave(&common->cc_lock, flags);
1002         busy = ath_update_survey_stats(sc);
1003         spin_unlock_irqrestore(&common->cc_lock, flags);
1004
1005         ath_dbg(common, ATH_DBG_RESET, "Possible baseband hang, "
1006                 "busy=%d (try %d)\n", busy, sc->hw_busy_count + 1);
1007         if (busy >= 99) {
1008                 if (++sc->hw_busy_count >= 3) {
1009                         RESET_STAT_INC(sc, RESET_TYPE_BB_HANG);
1010                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
1011                 }
1012
1013         } else if (busy >= 0)
1014                 sc->hw_busy_count = 0;
1015
1016 out:
1017         ath9k_ps_restore(sc);
1018 }
1019
1020 static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
1021 {
1022         static int count;
1023         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1024
1025         if (pll_sqsum >= 0x40000) {
1026                 count++;
1027                 if (count == 3) {
1028                         /* Rx is hung for more than 500ms. Reset it */
1029                         ath_dbg(common, ATH_DBG_RESET,
1030                                 "Possible RX hang, resetting");
1031                         RESET_STAT_INC(sc, RESET_TYPE_PLL_HANG);
1032                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
1033                         count = 0;
1034                 }
1035         } else
1036                 count = 0;
1037 }
1038
1039 void ath_hw_pll_work(struct work_struct *work)
1040 {
1041         struct ath_softc *sc = container_of(work, struct ath_softc,
1042                                             hw_pll_work.work);
1043         u32 pll_sqsum;
1044
1045         /*
1046          * ensure that the PLL WAR is executed only
1047          * after the STA is associated (or) if the
1048          * beaconing had started in interfaces that
1049          * uses beacons.
1050          */
1051         if (!(sc->sc_flags & SC_OP_BEACONS))
1052                 return;
1053
1054         if (AR_SREV_9485(sc->sc_ah)) {
1055
1056                 ath9k_ps_wakeup(sc);
1057                 pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
1058                 ath9k_ps_restore(sc);
1059
1060                 ath_hw_pll_rx_hang_check(sc, pll_sqsum);
1061
1062                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
1063         }
1064 }
1065
1066 /**********************/
1067 /* mac80211 callbacks */
1068 /**********************/
1069
1070 static int ath9k_start(struct ieee80211_hw *hw)
1071 {
1072         struct ath_softc *sc = hw->priv;
1073         struct ath_hw *ah = sc->sc_ah;
1074         struct ath_common *common = ath9k_hw_common(ah);
1075         struct ieee80211_channel *curchan = hw->conf.channel;
1076         struct ath9k_channel *init_channel;
1077         int r;
1078
1079         ath_dbg(common, ATH_DBG_CONFIG,
1080                 "Starting driver with initial channel: %d MHz\n",
1081                 curchan->center_freq);
1082
1083         ath9k_ps_wakeup(sc);
1084
1085         mutex_lock(&sc->mutex);
1086
1087         /* setup initial channel */
1088         sc->chan_idx = curchan->hw_value;
1089
1090         init_channel = ath9k_cmn_get_curchannel(hw, ah);
1091
1092         /* Reset SERDES registers */
1093         ath9k_hw_configpcipowersave(ah, false);
1094
1095         /*
1096          * The basic interface to setting the hardware in a good
1097          * state is ``reset''.  On return the hardware is known to
1098          * be powered up and with interrupts disabled.  This must
1099          * be followed by initialization of the appropriate bits
1100          * and then setup of the interrupt mask.
1101          */
1102         spin_lock_bh(&sc->sc_pcu_lock);
1103         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1104         if (r) {
1105                 ath_err(common,
1106                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1107                         r, curchan->center_freq);
1108                 spin_unlock_bh(&sc->sc_pcu_lock);
1109                 goto mutex_unlock;
1110         }
1111
1112         /* Setup our intr mask. */
1113         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1114                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1115                     ATH9K_INT_GLOBAL;
1116
1117         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1118                 ah->imask |= ATH9K_INT_RXHP |
1119                              ATH9K_INT_RXLP |
1120                              ATH9K_INT_BB_WATCHDOG;
1121         else
1122                 ah->imask |= ATH9K_INT_RX;
1123
1124         ah->imask |= ATH9K_INT_GTT;
1125
1126         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1127                 ah->imask |= ATH9K_INT_CST;
1128
1129         sc->sc_flags &= ~SC_OP_INVALID;
1130         sc->sc_ah->is_monitoring = false;
1131
1132         /* Disable BMISS interrupt when we're not associated */
1133         ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1134
1135         if (!ath_complete_reset(sc, false)) {
1136                 r = -EIO;
1137                 spin_unlock_bh(&sc->sc_pcu_lock);
1138                 goto mutex_unlock;
1139         }
1140
1141         spin_unlock_bh(&sc->sc_pcu_lock);
1142
1143         if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1144             !ah->btcoex_hw.enabled) {
1145                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1146                                            AR_STOMP_LOW_WLAN_WGHT);
1147                 ath9k_hw_btcoex_enable(ah);
1148
1149                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1150                         ath9k_btcoex_timer_resume(sc);
1151         }
1152
1153         if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1154                 common->bus_ops->extn_synch_en(common);
1155
1156 mutex_unlock:
1157         mutex_unlock(&sc->mutex);
1158
1159         ath9k_ps_restore(sc);
1160
1161         return r;
1162 }
1163
1164 static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1165 {
1166         struct ath_softc *sc = hw->priv;
1167         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1168         struct ath_tx_control txctl;
1169         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1170
1171         if (sc->ps_enabled) {
1172                 /*
1173                  * mac80211 does not set PM field for normal data frames, so we
1174                  * need to update that based on the current PS mode.
1175                  */
1176                 if (ieee80211_is_data(hdr->frame_control) &&
1177                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1178                     !ieee80211_has_pm(hdr->frame_control)) {
1179                         ath_dbg(common, ATH_DBG_PS,
1180                                 "Add PM=1 for a TX frame while in PS mode\n");
1181                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1182                 }
1183         }
1184
1185         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1186                 /*
1187                  * We are using PS-Poll and mac80211 can request TX while in
1188                  * power save mode. Need to wake up hardware for the TX to be
1189                  * completed and if needed, also for RX of buffered frames.
1190                  */
1191                 ath9k_ps_wakeup(sc);
1192                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1193                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1194                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1195                         ath_dbg(common, ATH_DBG_PS,
1196                                 "Sending PS-Poll to pick a buffered frame\n");
1197                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1198                 } else {
1199                         ath_dbg(common, ATH_DBG_PS,
1200                                 "Wake up to complete TX\n");
1201                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1202                 }
1203                 /*
1204                  * The actual restore operation will happen only after
1205                  * the sc_flags bit is cleared. We are just dropping
1206                  * the ps_usecount here.
1207                  */
1208                 ath9k_ps_restore(sc);
1209         }
1210
1211         memset(&txctl, 0, sizeof(struct ath_tx_control));
1212         txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1213
1214         ath_dbg(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1215
1216         if (ath_tx_start(hw, skb, &txctl) != 0) {
1217                 ath_dbg(common, ATH_DBG_XMIT, "TX failed\n");
1218                 goto exit;
1219         }
1220
1221         return;
1222 exit:
1223         dev_kfree_skb_any(skb);
1224 }
1225
1226 static void ath9k_stop(struct ieee80211_hw *hw)
1227 {
1228         struct ath_softc *sc = hw->priv;
1229         struct ath_hw *ah = sc->sc_ah;
1230         struct ath_common *common = ath9k_hw_common(ah);
1231
1232         mutex_lock(&sc->mutex);
1233
1234         ath_cancel_work(sc);
1235
1236         if (sc->sc_flags & SC_OP_INVALID) {
1237                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
1238                 mutex_unlock(&sc->mutex);
1239                 return;
1240         }
1241
1242         /* Ensure HW is awake when we try to shut it down. */
1243         ath9k_ps_wakeup(sc);
1244
1245         if (ah->btcoex_hw.enabled) {
1246                 ath9k_hw_btcoex_disable(ah);
1247                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1248                         ath9k_btcoex_timer_pause(sc);
1249         }
1250
1251         spin_lock_bh(&sc->sc_pcu_lock);
1252
1253         /* prevent tasklets to enable interrupts once we disable them */
1254         ah->imask &= ~ATH9K_INT_GLOBAL;
1255
1256         /* make sure h/w will not generate any interrupt
1257          * before setting the invalid flag. */
1258         ath9k_hw_disable_interrupts(ah);
1259
1260         if (!(sc->sc_flags & SC_OP_INVALID)) {
1261                 ath_drain_all_txq(sc, false);
1262                 ath_stoprecv(sc);
1263                 ath9k_hw_phy_disable(ah);
1264         } else
1265                 sc->rx.rxlink = NULL;
1266
1267         if (sc->rx.frag) {
1268                 dev_kfree_skb_any(sc->rx.frag);
1269                 sc->rx.frag = NULL;
1270         }
1271
1272         /* disable HAL and put h/w to sleep */
1273         ath9k_hw_disable(ah);
1274
1275         spin_unlock_bh(&sc->sc_pcu_lock);
1276
1277         /* we can now sync irq and kill any running tasklets, since we already
1278          * disabled interrupts and not holding a spin lock */
1279         synchronize_irq(sc->irq);
1280         tasklet_kill(&sc->intr_tq);
1281         tasklet_kill(&sc->bcon_tasklet);
1282
1283         ath9k_ps_restore(sc);
1284
1285         sc->ps_idle = true;
1286         ath_radio_disable(sc, hw);
1287
1288         sc->sc_flags |= SC_OP_INVALID;
1289
1290         mutex_unlock(&sc->mutex);
1291
1292         ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n");
1293 }
1294
1295 bool ath9k_uses_beacons(int type)
1296 {
1297         switch (type) {
1298         case NL80211_IFTYPE_AP:
1299         case NL80211_IFTYPE_ADHOC:
1300         case NL80211_IFTYPE_MESH_POINT:
1301                 return true;
1302         default:
1303                 return false;
1304         }
1305 }
1306
1307 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1308                                  struct ieee80211_vif *vif)
1309 {
1310         struct ath_vif *avp = (void *)vif->drv_priv;
1311
1312         ath9k_set_beaconing_status(sc, false);
1313         ath_beacon_return(sc, avp);
1314         ath9k_set_beaconing_status(sc, true);
1315         sc->sc_flags &= ~SC_OP_BEACONS;
1316 }
1317
1318 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1319 {
1320         struct ath9k_vif_iter_data *iter_data = data;
1321         int i;
1322
1323         if (iter_data->hw_macaddr)
1324                 for (i = 0; i < ETH_ALEN; i++)
1325                         iter_data->mask[i] &=
1326                                 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1327
1328         switch (vif->type) {
1329         case NL80211_IFTYPE_AP:
1330                 iter_data->naps++;
1331                 break;
1332         case NL80211_IFTYPE_STATION:
1333                 iter_data->nstations++;
1334                 break;
1335         case NL80211_IFTYPE_ADHOC:
1336                 iter_data->nadhocs++;
1337                 break;
1338         case NL80211_IFTYPE_MESH_POINT:
1339                 iter_data->nmeshes++;
1340                 break;
1341         case NL80211_IFTYPE_WDS:
1342                 iter_data->nwds++;
1343                 break;
1344         default:
1345                 iter_data->nothers++;
1346                 break;
1347         }
1348 }
1349
1350 /* Called with sc->mutex held. */
1351 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1352                                struct ieee80211_vif *vif,
1353                                struct ath9k_vif_iter_data *iter_data)
1354 {
1355         struct ath_softc *sc = hw->priv;
1356         struct ath_hw *ah = sc->sc_ah;
1357         struct ath_common *common = ath9k_hw_common(ah);
1358
1359         /*
1360          * Use the hardware MAC address as reference, the hardware uses it
1361          * together with the BSSID mask when matching addresses.
1362          */
1363         memset(iter_data, 0, sizeof(*iter_data));
1364         iter_data->hw_macaddr = common->macaddr;
1365         memset(&iter_data->mask, 0xff, ETH_ALEN);
1366
1367         if (vif)
1368                 ath9k_vif_iter(iter_data, vif->addr, vif);
1369
1370         /* Get list of all active MAC addresses */
1371         ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1372                                                    iter_data);
1373 }
1374
1375 /* Called with sc->mutex held. */
1376 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1377                                           struct ieee80211_vif *vif)
1378 {
1379         struct ath_softc *sc = hw->priv;
1380         struct ath_hw *ah = sc->sc_ah;
1381         struct ath_common *common = ath9k_hw_common(ah);
1382         struct ath9k_vif_iter_data iter_data;
1383
1384         ath9k_calculate_iter_data(hw, vif, &iter_data);
1385
1386         /* Set BSSID mask. */
1387         memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1388         ath_hw_setbssidmask(common);
1389
1390         /* Set op-mode & TSF */
1391         if (iter_data.naps > 0) {
1392                 ath9k_hw_set_tsfadjust(ah, 1);
1393                 sc->sc_flags |= SC_OP_TSF_RESET;
1394                 ah->opmode = NL80211_IFTYPE_AP;
1395         } else {
1396                 ath9k_hw_set_tsfadjust(ah, 0);
1397                 sc->sc_flags &= ~SC_OP_TSF_RESET;
1398
1399                 if (iter_data.nmeshes)
1400                         ah->opmode = NL80211_IFTYPE_MESH_POINT;
1401                 else if (iter_data.nwds)
1402                         ah->opmode = NL80211_IFTYPE_AP;
1403                 else if (iter_data.nadhocs)
1404                         ah->opmode = NL80211_IFTYPE_ADHOC;
1405                 else
1406                         ah->opmode = NL80211_IFTYPE_STATION;
1407         }
1408
1409         /*
1410          * Enable MIB interrupts when there are hardware phy counters.
1411          */
1412         if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1413                 if (ah->config.enable_ani)
1414                         ah->imask |= ATH9K_INT_MIB;
1415                 ah->imask |= ATH9K_INT_TSFOOR;
1416         } else {
1417                 ah->imask &= ~ATH9K_INT_MIB;
1418                 ah->imask &= ~ATH9K_INT_TSFOOR;
1419         }
1420
1421         ath9k_hw_set_interrupts(ah);
1422
1423         /* Set up ANI */
1424         if (iter_data.naps > 0) {
1425                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1426
1427                 if (!common->disable_ani) {
1428                         sc->sc_flags |= SC_OP_ANI_RUN;
1429                         ath_start_ani(common);
1430                 }
1431
1432         } else {
1433                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1434                 del_timer_sync(&common->ani.timer);
1435         }
1436 }
1437
1438 /* Called with sc->mutex held, vif counts set up properly. */
1439 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1440                                    struct ieee80211_vif *vif)
1441 {
1442         struct ath_softc *sc = hw->priv;
1443
1444         ath9k_calculate_summary_state(hw, vif);
1445
1446         if (ath9k_uses_beacons(vif->type)) {
1447                 int error;
1448                 /* This may fail because upper levels do not have beacons
1449                  * properly configured yet.  That's OK, we assume it
1450                  * will be properly configured and then we will be notified
1451                  * in the info_changed method and set up beacons properly
1452                  * there.
1453                  */
1454                 ath9k_set_beaconing_status(sc, false);
1455                 error = ath_beacon_alloc(sc, vif);
1456                 if (!error)
1457                         ath_beacon_config(sc, vif);
1458                 ath9k_set_beaconing_status(sc, true);
1459         }
1460 }
1461
1462
1463 static int ath9k_add_interface(struct ieee80211_hw *hw,
1464                                struct ieee80211_vif *vif)
1465 {
1466         struct ath_softc *sc = hw->priv;
1467         struct ath_hw *ah = sc->sc_ah;
1468         struct ath_common *common = ath9k_hw_common(ah);
1469         int ret = 0;
1470
1471         ath9k_ps_wakeup(sc);
1472         mutex_lock(&sc->mutex);
1473
1474         switch (vif->type) {
1475         case NL80211_IFTYPE_STATION:
1476         case NL80211_IFTYPE_WDS:
1477         case NL80211_IFTYPE_ADHOC:
1478         case NL80211_IFTYPE_AP:
1479         case NL80211_IFTYPE_MESH_POINT:
1480                 break;
1481         default:
1482                 ath_err(common, "Interface type %d not yet supported\n",
1483                         vif->type);
1484                 ret = -EOPNOTSUPP;
1485                 goto out;
1486         }
1487
1488         if (ath9k_uses_beacons(vif->type)) {
1489                 if (sc->nbcnvifs >= ATH_BCBUF) {
1490                         ath_err(common, "Not enough beacon buffers when adding"
1491                                 " new interface of type: %i\n",
1492                                 vif->type);
1493                         ret = -ENOBUFS;
1494                         goto out;
1495                 }
1496         }
1497
1498         ath_dbg(common, ATH_DBG_CONFIG,
1499                 "Attach a VIF of type: %d\n", vif->type);
1500
1501         sc->nvifs++;
1502
1503         ath9k_do_vif_add_setup(hw, vif);
1504 out:
1505         mutex_unlock(&sc->mutex);
1506         ath9k_ps_restore(sc);
1507         return ret;
1508 }
1509
1510 static int ath9k_change_interface(struct ieee80211_hw *hw,
1511                                   struct ieee80211_vif *vif,
1512                                   enum nl80211_iftype new_type,
1513                                   bool p2p)
1514 {
1515         struct ath_softc *sc = hw->priv;
1516         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1517         int ret = 0;
1518
1519         ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");
1520         mutex_lock(&sc->mutex);
1521         ath9k_ps_wakeup(sc);
1522
1523         /* See if new interface type is valid. */
1524         if ((new_type == NL80211_IFTYPE_ADHOC) &&
1525             (sc->nvifs > 1)) {
1526                 ath_err(common, "When using ADHOC, it must be the only"
1527                         " interface.\n");
1528                 ret = -EINVAL;
1529                 goto out;
1530         }
1531
1532         if (ath9k_uses_beacons(new_type) &&
1533             !ath9k_uses_beacons(vif->type)) {
1534                 if (sc->nbcnvifs >= ATH_BCBUF) {
1535                         ath_err(common, "No beacon slot available\n");
1536                         ret = -ENOBUFS;
1537                         goto out;
1538                 }
1539         }
1540
1541         /* Clean up old vif stuff */
1542         if (ath9k_uses_beacons(vif->type))
1543                 ath9k_reclaim_beacon(sc, vif);
1544
1545         /* Add new settings */
1546         vif->type = new_type;
1547         vif->p2p = p2p;
1548
1549         ath9k_do_vif_add_setup(hw, vif);
1550 out:
1551         ath9k_ps_restore(sc);
1552         mutex_unlock(&sc->mutex);
1553         return ret;
1554 }
1555
1556 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1557                                    struct ieee80211_vif *vif)
1558 {
1559         struct ath_softc *sc = hw->priv;
1560         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1561
1562         ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
1563
1564         ath9k_ps_wakeup(sc);
1565         mutex_lock(&sc->mutex);
1566
1567         sc->nvifs--;
1568
1569         /* Reclaim beacon resources */
1570         if (ath9k_uses_beacons(vif->type))
1571                 ath9k_reclaim_beacon(sc, vif);
1572
1573         ath9k_calculate_summary_state(hw, NULL);
1574
1575         mutex_unlock(&sc->mutex);
1576         ath9k_ps_restore(sc);
1577 }
1578
1579 static void ath9k_enable_ps(struct ath_softc *sc)
1580 {
1581         struct ath_hw *ah = sc->sc_ah;
1582
1583         sc->ps_enabled = true;
1584         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1585                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1586                         ah->imask |= ATH9K_INT_TIM_TIMER;
1587                         ath9k_hw_set_interrupts(ah);
1588                 }
1589                 ath9k_hw_setrxabort(ah, 1);
1590         }
1591 }
1592
1593 static void ath9k_disable_ps(struct ath_softc *sc)
1594 {
1595         struct ath_hw *ah = sc->sc_ah;
1596
1597         sc->ps_enabled = false;
1598         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1599         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1600                 ath9k_hw_setrxabort(ah, 0);
1601                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1602                                   PS_WAIT_FOR_CAB |
1603                                   PS_WAIT_FOR_PSPOLL_DATA |
1604                                   PS_WAIT_FOR_TX_ACK);
1605                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1606                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1607                         ath9k_hw_set_interrupts(ah);
1608                 }
1609         }
1610
1611 }
1612
1613 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1614 {
1615         struct ath_softc *sc = hw->priv;
1616         struct ath_hw *ah = sc->sc_ah;
1617         struct ath_common *common = ath9k_hw_common(ah);
1618         struct ieee80211_conf *conf = &hw->conf;
1619         bool disable_radio = false;
1620
1621         mutex_lock(&sc->mutex);
1622
1623         /*
1624          * Leave this as the first check because we need to turn on the
1625          * radio if it was disabled before prior to processing the rest
1626          * of the changes. Likewise we must only disable the radio towards
1627          * the end.
1628          */
1629         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1630                 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1631                 if (!sc->ps_idle) {
1632                         ath_radio_enable(sc, hw);
1633                         ath_dbg(common, ATH_DBG_CONFIG,
1634                                 "not-idle: enabling radio\n");
1635                 } else {
1636                         disable_radio = true;
1637                 }
1638         }
1639
1640         /*
1641          * We just prepare to enable PS. We have to wait until our AP has
1642          * ACK'd our null data frame to disable RX otherwise we'll ignore
1643          * those ACKs and end up retransmitting the same null data frames.
1644          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1645          */
1646         if (changed & IEEE80211_CONF_CHANGE_PS) {
1647                 unsigned long flags;
1648                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1649                 if (conf->flags & IEEE80211_CONF_PS)
1650                         ath9k_enable_ps(sc);
1651                 else
1652                         ath9k_disable_ps(sc);
1653                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1654         }
1655
1656         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1657                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1658                         ath_dbg(common, ATH_DBG_CONFIG,
1659                                 "Monitor mode is enabled\n");
1660                         sc->sc_ah->is_monitoring = true;
1661                 } else {
1662                         ath_dbg(common, ATH_DBG_CONFIG,
1663                                 "Monitor mode is disabled\n");
1664                         sc->sc_ah->is_monitoring = false;
1665                 }
1666         }
1667
1668         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1669                 struct ieee80211_channel *curchan = hw->conf.channel;
1670                 int pos = curchan->hw_value;
1671                 int old_pos = -1;
1672                 unsigned long flags;
1673
1674                 if (ah->curchan)
1675                         old_pos = ah->curchan - &ah->channels[0];
1676
1677                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1678                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1679                 else
1680                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1681
1682                 ath_dbg(common, ATH_DBG_CONFIG,
1683                         "Set channel: %d MHz type: %d\n",
1684                         curchan->center_freq, conf->channel_type);
1685
1686                 /* update survey stats for the old channel before switching */
1687                 spin_lock_irqsave(&common->cc_lock, flags);
1688                 ath_update_survey_stats(sc);
1689                 spin_unlock_irqrestore(&common->cc_lock, flags);
1690
1691                 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1692                                           curchan, conf->channel_type);
1693
1694                 /*
1695                  * If the operating channel changes, change the survey in-use flags
1696                  * along with it.
1697                  * Reset the survey data for the new channel, unless we're switching
1698                  * back to the operating channel from an off-channel operation.
1699                  */
1700                 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1701                     sc->cur_survey != &sc->survey[pos]) {
1702
1703                         if (sc->cur_survey)
1704                                 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1705
1706                         sc->cur_survey = &sc->survey[pos];
1707
1708                         memset(sc->cur_survey, 0, sizeof(struct survey_info));
1709                         sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1710                 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1711                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1712                 }
1713
1714                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1715                         ath_err(common, "Unable to set channel\n");
1716                         mutex_unlock(&sc->mutex);
1717                         return -EINVAL;
1718                 }
1719
1720                 /*
1721                  * The most recent snapshot of channel->noisefloor for the old
1722                  * channel is only available after the hardware reset. Copy it to
1723                  * the survey stats now.
1724                  */
1725                 if (old_pos >= 0)
1726                         ath_update_survey_nf(sc, old_pos);
1727         }
1728
1729         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1730                 ath_dbg(common, ATH_DBG_CONFIG,
1731                         "Set power: %d\n", conf->power_level);
1732                 sc->config.txpowlimit = 2 * conf->power_level;
1733                 ath9k_ps_wakeup(sc);
1734                 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1735                                        sc->config.txpowlimit, &sc->curtxpow);
1736                 ath9k_ps_restore(sc);
1737         }
1738
1739         if (disable_radio) {
1740                 ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1741                 ath_radio_disable(sc, hw);
1742         }
1743
1744         mutex_unlock(&sc->mutex);
1745
1746         return 0;
1747 }
1748
1749 #define SUPPORTED_FILTERS                       \
1750         (FIF_PROMISC_IN_BSS |                   \
1751         FIF_ALLMULTI |                          \
1752         FIF_CONTROL |                           \
1753         FIF_PSPOLL |                            \
1754         FIF_OTHER_BSS |                         \
1755         FIF_BCN_PRBRESP_PROMISC |               \
1756         FIF_PROBE_REQ |                         \
1757         FIF_FCSFAIL)
1758
1759 /* FIXME: sc->sc_full_reset ? */
1760 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1761                                    unsigned int changed_flags,
1762                                    unsigned int *total_flags,
1763                                    u64 multicast)
1764 {
1765         struct ath_softc *sc = hw->priv;
1766         u32 rfilt;
1767
1768         changed_flags &= SUPPORTED_FILTERS;
1769         *total_flags &= SUPPORTED_FILTERS;
1770
1771         sc->rx.rxfilter = *total_flags;
1772         ath9k_ps_wakeup(sc);
1773         rfilt = ath_calcrxfilter(sc);
1774         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1775         ath9k_ps_restore(sc);
1776
1777         ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1778                 "Set HW RX filter: 0x%x\n", rfilt);
1779 }
1780
1781 static int ath9k_sta_add(struct ieee80211_hw *hw,
1782                          struct ieee80211_vif *vif,
1783                          struct ieee80211_sta *sta)
1784 {
1785         struct ath_softc *sc = hw->priv;
1786         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1787         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1788         struct ieee80211_key_conf ps_key = { };
1789         int key;
1790
1791         ath_node_attach(sc, sta);
1792
1793         if (vif->type != NL80211_IFTYPE_AP &&
1794             vif->type != NL80211_IFTYPE_AP_VLAN)
1795                 return 0;
1796
1797         key = ath_key_config(common, vif, sta, &ps_key);
1798         if (key > 0)
1799                 an->ps_key = key;
1800
1801         return 0;
1802 }
1803
1804 static void ath9k_del_ps_key(struct ath_softc *sc,
1805                              struct ieee80211_vif *vif,
1806                              struct ieee80211_sta *sta)
1807 {
1808         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1809         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1810         struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1811
1812         if (!an->ps_key)
1813             return;
1814
1815         ath_key_delete(common, &ps_key);
1816         an->ps_key = 0;
1817 }
1818
1819 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1820                             struct ieee80211_vif *vif,
1821                             struct ieee80211_sta *sta)
1822 {
1823         struct ath_softc *sc = hw->priv;
1824
1825         ath9k_del_ps_key(sc, vif, sta);
1826         ath_node_detach(sc, sta);
1827
1828         return 0;
1829 }
1830
1831 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1832                          struct ieee80211_vif *vif,
1833                          enum sta_notify_cmd cmd,
1834                          struct ieee80211_sta *sta)
1835 {
1836         struct ath_softc *sc = hw->priv;
1837         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1838
1839         if (!(sc->sc_flags & SC_OP_TXAGGR))
1840                 return;
1841
1842         switch (cmd) {
1843         case STA_NOTIFY_SLEEP:
1844                 an->sleeping = true;
1845                 ath_tx_aggr_sleep(sta, sc, an);
1846                 break;
1847         case STA_NOTIFY_AWAKE:
1848                 an->sleeping = false;
1849                 ath_tx_aggr_wakeup(sc, an);
1850                 break;
1851         }
1852 }
1853
1854 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1855                          struct ieee80211_vif *vif, u16 queue,
1856                          const struct ieee80211_tx_queue_params *params)
1857 {
1858         struct ath_softc *sc = hw->priv;
1859         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1860         struct ath_txq *txq;
1861         struct ath9k_tx_queue_info qi;
1862         int ret = 0;
1863
1864         if (queue >= WME_NUM_AC)
1865                 return 0;
1866
1867         txq = sc->tx.txq_map[queue];
1868
1869         ath9k_ps_wakeup(sc);
1870         mutex_lock(&sc->mutex);
1871
1872         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1873
1874         qi.tqi_aifs = params->aifs;
1875         qi.tqi_cwmin = params->cw_min;
1876         qi.tqi_cwmax = params->cw_max;
1877         qi.tqi_burstTime = params->txop;
1878
1879         ath_dbg(common, ATH_DBG_CONFIG,
1880                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1881                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1882                 params->cw_max, params->txop);
1883
1884         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1885         if (ret)
1886                 ath_err(common, "TXQ Update failed\n");
1887
1888         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1889                 if (queue == WME_AC_BE && !ret)
1890                         ath_beaconq_config(sc);
1891
1892         mutex_unlock(&sc->mutex);
1893         ath9k_ps_restore(sc);
1894
1895         return ret;
1896 }
1897
1898 static int ath9k_set_key(struct ieee80211_hw *hw,
1899                          enum set_key_cmd cmd,
1900                          struct ieee80211_vif *vif,
1901                          struct ieee80211_sta *sta,
1902                          struct ieee80211_key_conf *key)
1903 {
1904         struct ath_softc *sc = hw->priv;
1905         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1906         int ret = 0;
1907
1908         if (ath9k_modparam_nohwcrypt)
1909                 return -ENOSPC;
1910
1911         if (vif->type == NL80211_IFTYPE_ADHOC &&
1912             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1913              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1914             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1915                 /*
1916                  * For now, disable hw crypto for the RSN IBSS group keys. This
1917                  * could be optimized in the future to use a modified key cache
1918                  * design to support per-STA RX GTK, but until that gets
1919                  * implemented, use of software crypto for group addressed
1920                  * frames is a acceptable to allow RSN IBSS to be used.
1921                  */
1922                 return -EOPNOTSUPP;
1923         }
1924
1925         mutex_lock(&sc->mutex);
1926         ath9k_ps_wakeup(sc);
1927         ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");
1928
1929         switch (cmd) {
1930         case SET_KEY:
1931                 if (sta)
1932                         ath9k_del_ps_key(sc, vif, sta);
1933
1934                 ret = ath_key_config(common, vif, sta, key);
1935                 if (ret >= 0) {
1936                         key->hw_key_idx = ret;
1937                         /* push IV and Michael MIC generation to stack */
1938                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1939                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1940                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1941                         if (sc->sc_ah->sw_mgmt_crypto &&
1942                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1943                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1944                         ret = 0;
1945                 }
1946                 break;
1947         case DISABLE_KEY:
1948                 ath_key_delete(common, key);
1949                 break;
1950         default:
1951                 ret = -EINVAL;
1952         }
1953
1954         ath9k_ps_restore(sc);
1955         mutex_unlock(&sc->mutex);
1956
1957         return ret;
1958 }
1959 static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1960 {
1961         struct ath_softc *sc = data;
1962         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1963         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1964         struct ath_vif *avp = (void *)vif->drv_priv;
1965
1966         /*
1967          * Skip iteration if primary station vif's bss info
1968          * was not changed
1969          */
1970         if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1971                 return;
1972
1973         if (bss_conf->assoc) {
1974                 sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1975                 avp->primary_sta_vif = true;
1976                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1977                 common->curaid = bss_conf->aid;
1978                 ath9k_hw_write_associd(sc->sc_ah);
1979                 ath_dbg(common, ATH_DBG_CONFIG,
1980                                 "Bss Info ASSOC %d, bssid: %pM\n",
1981                                 bss_conf->aid, common->curbssid);
1982                 ath_beacon_config(sc, vif);
1983                 /*
1984                  * Request a re-configuration of Beacon related timers
1985                  * on the receipt of the first Beacon frame (i.e.,
1986                  * after time sync with the AP).
1987                  */
1988                 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1989                 /* Reset rssi stats */
1990                 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
1991                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1992
1993                 if (!common->disable_ani) {
1994                         sc->sc_flags |= SC_OP_ANI_RUN;
1995                         ath_start_ani(common);
1996                 }
1997
1998         }
1999 }
2000
2001 static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
2002 {
2003         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2004         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2005         struct ath_vif *avp = (void *)vif->drv_priv;
2006
2007         if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
2008                 return;
2009
2010         /* Reconfigure bss info */
2011         if (avp->primary_sta_vif && !bss_conf->assoc) {
2012                 ath_dbg(common, ATH_DBG_CONFIG,
2013                         "Bss Info DISASSOC %d, bssid %pM\n",
2014                         common->curaid, common->curbssid);
2015                 sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
2016                 avp->primary_sta_vif = false;
2017                 memset(common->curbssid, 0, ETH_ALEN);
2018                 common->curaid = 0;
2019         }
2020
2021         ieee80211_iterate_active_interfaces_atomic(
2022                         sc->hw, ath9k_bss_iter, sc);
2023
2024         /*
2025          * None of station vifs are associated.
2026          * Clear bssid & aid
2027          */
2028         if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
2029                 ath9k_hw_write_associd(sc->sc_ah);
2030                 /* Stop ANI */
2031                 sc->sc_flags &= ~SC_OP_ANI_RUN;
2032                 del_timer_sync(&common->ani.timer);
2033                 memset(&sc->caldata, 0, sizeof(sc->caldata));
2034         }
2035 }
2036
2037 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
2038                                    struct ieee80211_vif *vif,
2039                                    struct ieee80211_bss_conf *bss_conf,
2040                                    u32 changed)
2041 {
2042         struct ath_softc *sc = hw->priv;
2043         struct ath_hw *ah = sc->sc_ah;
2044         struct ath_common *common = ath9k_hw_common(ah);
2045         struct ath_vif *avp = (void *)vif->drv_priv;
2046         int slottime;
2047         int error;
2048
2049         ath9k_ps_wakeup(sc);
2050         mutex_lock(&sc->mutex);
2051
2052         if (changed & BSS_CHANGED_BSSID) {
2053                 ath9k_config_bss(sc, vif);
2054
2055                 ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n",
2056                         common->curbssid, common->curaid);
2057         }
2058
2059         if (changed & BSS_CHANGED_IBSS) {
2060                 /* There can be only one vif available */
2061                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2062                 common->curaid = bss_conf->aid;
2063                 ath9k_hw_write_associd(sc->sc_ah);
2064
2065                 if (bss_conf->ibss_joined) {
2066                         sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2067
2068                         if (!common->disable_ani) {
2069                                 sc->sc_flags |= SC_OP_ANI_RUN;
2070                                 ath_start_ani(common);
2071                         }
2072
2073                 } else {
2074                         sc->sc_flags &= ~SC_OP_ANI_RUN;
2075                         del_timer_sync(&common->ani.timer);
2076                 }
2077         }
2078
2079         /* Enable transmission of beacons (AP, IBSS, MESH) */
2080         if ((changed & BSS_CHANGED_BEACON) ||
2081             ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
2082                 ath9k_set_beaconing_status(sc, false);
2083                 error = ath_beacon_alloc(sc, vif);
2084                 if (!error)
2085                         ath_beacon_config(sc, vif);
2086                 ath9k_set_beaconing_status(sc, true);
2087         }
2088
2089         if (changed & BSS_CHANGED_ERP_SLOT) {
2090                 if (bss_conf->use_short_slot)
2091                         slottime = 9;
2092                 else
2093                         slottime = 20;
2094                 if (vif->type == NL80211_IFTYPE_AP) {
2095                         /*
2096                          * Defer update, so that connected stations can adjust
2097                          * their settings at the same time.
2098                          * See beacon.c for more details
2099                          */
2100                         sc->beacon.slottime = slottime;
2101                         sc->beacon.updateslot = UPDATE;
2102                 } else {
2103                         ah->slottime = slottime;
2104                         ath9k_hw_init_global_settings(ah);
2105                 }
2106         }
2107
2108         /* Disable transmission of beacons */
2109         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
2110             !bss_conf->enable_beacon) {
2111                 ath9k_set_beaconing_status(sc, false);
2112                 avp->is_bslot_active = false;
2113                 ath9k_set_beaconing_status(sc, true);
2114         }
2115
2116         if (changed & BSS_CHANGED_BEACON_INT) {
2117                 /*
2118                  * In case of AP mode, the HW TSF has to be reset
2119                  * when the beacon interval changes.
2120                  */
2121                 if (vif->type == NL80211_IFTYPE_AP) {
2122                         sc->sc_flags |= SC_OP_TSF_RESET;
2123                         ath9k_set_beaconing_status(sc, false);
2124                         error = ath_beacon_alloc(sc, vif);
2125                         if (!error)
2126                                 ath_beacon_config(sc, vif);
2127                         ath9k_set_beaconing_status(sc, true);
2128                 } else
2129                         ath_beacon_config(sc, vif);
2130         }
2131
2132         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
2133                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
2134                         bss_conf->use_short_preamble);
2135                 if (bss_conf->use_short_preamble)
2136                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
2137                 else
2138                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2139         }
2140
2141         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2142                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
2143                         bss_conf->use_cts_prot);
2144                 if (bss_conf->use_cts_prot &&
2145                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2146                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2147                 else
2148                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2149         }
2150
2151         mutex_unlock(&sc->mutex);
2152         ath9k_ps_restore(sc);
2153 }
2154
2155 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2156 {
2157         struct ath_softc *sc = hw->priv;
2158         u64 tsf;
2159
2160         mutex_lock(&sc->mutex);
2161         ath9k_ps_wakeup(sc);
2162         tsf = ath9k_hw_gettsf64(sc->sc_ah);
2163         ath9k_ps_restore(sc);
2164         mutex_unlock(&sc->mutex);
2165
2166         return tsf;
2167 }
2168
2169 static void ath9k_set_tsf(struct ieee80211_hw *hw,
2170                           struct ieee80211_vif *vif,
2171                           u64 tsf)
2172 {
2173         struct ath_softc *sc = hw->priv;
2174
2175         mutex_lock(&sc->mutex);
2176         ath9k_ps_wakeup(sc);
2177         ath9k_hw_settsf64(sc->sc_ah, tsf);
2178         ath9k_ps_restore(sc);
2179         mutex_unlock(&sc->mutex);
2180 }
2181
2182 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2183 {
2184         struct ath_softc *sc = hw->priv;
2185
2186         mutex_lock(&sc->mutex);
2187
2188         ath9k_ps_wakeup(sc);
2189         ath9k_hw_reset_tsf(sc->sc_ah);
2190         ath9k_ps_restore(sc);
2191
2192         mutex_unlock(&sc->mutex);
2193 }
2194
2195 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2196                               struct ieee80211_vif *vif,
2197                               enum ieee80211_ampdu_mlme_action action,
2198                               struct ieee80211_sta *sta,
2199                               u16 tid, u16 *ssn, u8 buf_size)
2200 {
2201         struct ath_softc *sc = hw->priv;
2202         int ret = 0;
2203
2204         local_bh_disable();
2205
2206         switch (action) {
2207         case IEEE80211_AMPDU_RX_START:
2208                 if (!(sc->sc_flags & SC_OP_RXAGGR))
2209                         ret = -ENOTSUPP;
2210                 break;
2211         case IEEE80211_AMPDU_RX_STOP:
2212                 break;
2213         case IEEE80211_AMPDU_TX_START:
2214                 if (!(sc->sc_flags & SC_OP_TXAGGR))
2215                         return -EOPNOTSUPP;
2216
2217                 ath9k_ps_wakeup(sc);
2218                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2219                 if (!ret)
2220                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2221                 ath9k_ps_restore(sc);
2222                 break;
2223         case IEEE80211_AMPDU_TX_STOP:
2224                 ath9k_ps_wakeup(sc);
2225                 ath_tx_aggr_stop(sc, sta, tid);
2226                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2227                 ath9k_ps_restore(sc);
2228                 break;
2229         case IEEE80211_AMPDU_TX_OPERATIONAL:
2230                 ath9k_ps_wakeup(sc);
2231                 ath_tx_aggr_resume(sc, sta, tid);
2232                 ath9k_ps_restore(sc);
2233                 break;
2234         default:
2235                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2236         }
2237
2238         local_bh_enable();
2239
2240         return ret;
2241 }
2242
2243 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2244                              struct survey_info *survey)
2245 {
2246         struct ath_softc *sc = hw->priv;
2247         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2248         struct ieee80211_supported_band *sband;
2249         struct ieee80211_channel *chan;
2250         unsigned long flags;
2251         int pos;
2252
2253         spin_lock_irqsave(&common->cc_lock, flags);
2254         if (idx == 0)
2255                 ath_update_survey_stats(sc);
2256
2257         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2258         if (sband && idx >= sband->n_channels) {
2259                 idx -= sband->n_channels;
2260                 sband = NULL;
2261         }
2262
2263         if (!sband)
2264                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2265
2266         if (!sband || idx >= sband->n_channels) {
2267                 spin_unlock_irqrestore(&common->cc_lock, flags);
2268                 return -ENOENT;
2269         }
2270
2271         chan = &sband->channels[idx];
2272         pos = chan->hw_value;
2273         memcpy(survey, &sc->survey[pos], sizeof(*survey));
2274         survey->channel = chan;
2275         spin_unlock_irqrestore(&common->cc_lock, flags);
2276
2277         return 0;
2278 }
2279
2280 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2281 {
2282         struct ath_softc *sc = hw->priv;
2283         struct ath_hw *ah = sc->sc_ah;
2284
2285         mutex_lock(&sc->mutex);
2286         ah->coverage_class = coverage_class;
2287
2288         ath9k_ps_wakeup(sc);
2289         ath9k_hw_init_global_settings(ah);
2290         ath9k_ps_restore(sc);
2291
2292         mutex_unlock(&sc->mutex);
2293 }
2294
2295 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
2296 {
2297         struct ath_softc *sc = hw->priv;
2298         struct ath_hw *ah = sc->sc_ah;
2299         struct ath_common *common = ath9k_hw_common(ah);
2300         int timeout = 200; /* ms */
2301         int i, j;
2302         bool drain_txq;
2303
2304         mutex_lock(&sc->mutex);
2305         cancel_delayed_work_sync(&sc->tx_complete_work);
2306
2307         if (ah->ah_flags & AH_UNPLUGGED) {
2308                 ath_dbg(common, ATH_DBG_ANY, "Device has been unplugged!\n");
2309                 mutex_unlock(&sc->mutex);
2310                 return;
2311         }
2312
2313         if (sc->sc_flags & SC_OP_INVALID) {
2314                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
2315                 mutex_unlock(&sc->mutex);
2316                 return;
2317         }
2318
2319         if (drop)
2320                 timeout = 1;
2321
2322         for (j = 0; j < timeout; j++) {
2323                 bool npend = false;
2324
2325                 if (j)
2326                         usleep_range(1000, 2000);
2327
2328                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2329                         if (!ATH_TXQ_SETUP(sc, i))
2330                                 continue;
2331
2332                         npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2333
2334                         if (npend)
2335                                 break;
2336                 }
2337
2338                 if (!npend)
2339                     goto out;
2340         }
2341
2342         ath9k_ps_wakeup(sc);
2343         spin_lock_bh(&sc->sc_pcu_lock);
2344         drain_txq = ath_drain_all_txq(sc, false);
2345         spin_unlock_bh(&sc->sc_pcu_lock);
2346
2347         if (!drain_txq)
2348                 ath_reset(sc, false);
2349
2350         ath9k_ps_restore(sc);
2351         ieee80211_wake_queues(hw);
2352
2353 out:
2354         ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2355         mutex_unlock(&sc->mutex);
2356 }
2357
2358 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2359 {
2360         struct ath_softc *sc = hw->priv;
2361         int i;
2362
2363         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2364                 if (!ATH_TXQ_SETUP(sc, i))
2365                         continue;
2366
2367                 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2368                         return true;
2369         }
2370         return false;
2371 }
2372
2373 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2374 {
2375         struct ath_softc *sc = hw->priv;
2376         struct ath_hw *ah = sc->sc_ah;
2377         struct ieee80211_vif *vif;
2378         struct ath_vif *avp;
2379         struct ath_buf *bf;
2380         struct ath_tx_status ts;
2381         int status;
2382
2383         vif = sc->beacon.bslot[0];
2384         if (!vif)
2385                 return 0;
2386
2387         avp = (void *)vif->drv_priv;
2388         if (!avp->is_bslot_active)
2389                 return 0;
2390
2391         if (!sc->beacon.tx_processed) {
2392                 tasklet_disable(&sc->bcon_tasklet);
2393
2394                 bf = avp->av_bcbuf;
2395                 if (!bf || !bf->bf_mpdu)
2396                         goto skip;
2397
2398                 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2399                 if (status == -EINPROGRESS)
2400                         goto skip;
2401
2402                 sc->beacon.tx_processed = true;
2403                 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2404
2405 skip:
2406                 tasklet_enable(&sc->bcon_tasklet);
2407         }
2408
2409         return sc->beacon.tx_last;
2410 }
2411
2412 static int ath9k_get_stats(struct ieee80211_hw *hw,
2413                            struct ieee80211_low_level_stats *stats)
2414 {
2415         struct ath_softc *sc = hw->priv;
2416         struct ath_hw *ah = sc->sc_ah;
2417         struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2418
2419         stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2420         stats->dot11RTSFailureCount = mib_stats->rts_bad;
2421         stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2422         stats->dot11RTSSuccessCount = mib_stats->rts_good;
2423         return 0;
2424 }
2425
2426 static u32 fill_chainmask(u32 cap, u32 new)
2427 {
2428         u32 filled = 0;
2429         int i;
2430
2431         for (i = 0; cap && new; i++, cap >>= 1) {
2432                 if (!(cap & BIT(0)))
2433                         continue;
2434
2435                 if (new & BIT(0))
2436                         filled |= BIT(i);
2437
2438                 new >>= 1;
2439         }
2440
2441         return filled;
2442 }
2443
2444 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2445 {
2446         struct ath_softc *sc = hw->priv;
2447         struct ath_hw *ah = sc->sc_ah;
2448
2449         if (!rx_ant || !tx_ant)
2450                 return -EINVAL;
2451
2452         sc->ant_rx = rx_ant;
2453         sc->ant_tx = tx_ant;
2454
2455         if (ah->caps.rx_chainmask == 1)
2456                 return 0;
2457
2458         /* AR9100 runs into calibration issues if not all rx chains are enabled */
2459         if (AR_SREV_9100(ah))
2460                 ah->rxchainmask = 0x7;
2461         else
2462                 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2463
2464         ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2465         ath9k_reload_chainmask_settings(sc);
2466
2467         return 0;
2468 }
2469
2470 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2471 {
2472         struct ath_softc *sc = hw->priv;
2473
2474         *tx_ant = sc->ant_tx;
2475         *rx_ant = sc->ant_rx;
2476         return 0;
2477 }
2478
2479 struct ieee80211_ops ath9k_ops = {
2480         .tx                 = ath9k_tx,
2481         .start              = ath9k_start,
2482         .stop               = ath9k_stop,
2483         .add_interface      = ath9k_add_interface,
2484         .change_interface   = ath9k_change_interface,
2485         .remove_interface   = ath9k_remove_interface,
2486         .config             = ath9k_config,
2487         .configure_filter   = ath9k_configure_filter,
2488         .sta_add            = ath9k_sta_add,
2489         .sta_remove         = ath9k_sta_remove,
2490         .sta_notify         = ath9k_sta_notify,
2491         .conf_tx            = ath9k_conf_tx,
2492         .bss_info_changed   = ath9k_bss_info_changed,
2493         .set_key            = ath9k_set_key,
2494         .get_tsf            = ath9k_get_tsf,
2495         .set_tsf            = ath9k_set_tsf,
2496         .reset_tsf          = ath9k_reset_tsf,
2497         .ampdu_action       = ath9k_ampdu_action,
2498         .get_survey         = ath9k_get_survey,
2499         .rfkill_poll        = ath9k_rfkill_poll_state,
2500         .set_coverage_class = ath9k_set_coverage_class,
2501         .flush              = ath9k_flush,
2502         .tx_frames_pending  = ath9k_tx_frames_pending,
2503         .tx_last_beacon     = ath9k_tx_last_beacon,
2504         .get_stats          = ath9k_get_stats,
2505         .set_antenna        = ath9k_set_antenna,
2506         .get_antenna        = ath9k_get_antenna,
2507 };