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         if (AR_SREV_9485(sc->sc_ah)) {
1046
1047                 ath9k_ps_wakeup(sc);
1048                 pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
1049                 ath9k_ps_restore(sc);
1050
1051                 ath_hw_pll_rx_hang_check(sc, pll_sqsum);
1052
1053                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
1054         }
1055 }
1056
1057 /**********************/
1058 /* mac80211 callbacks */
1059 /**********************/
1060
1061 static int ath9k_start(struct ieee80211_hw *hw)
1062 {
1063         struct ath_softc *sc = hw->priv;
1064         struct ath_hw *ah = sc->sc_ah;
1065         struct ath_common *common = ath9k_hw_common(ah);
1066         struct ieee80211_channel *curchan = hw->conf.channel;
1067         struct ath9k_channel *init_channel;
1068         int r;
1069
1070         ath_dbg(common, ATH_DBG_CONFIG,
1071                 "Starting driver with initial channel: %d MHz\n",
1072                 curchan->center_freq);
1073
1074         ath9k_ps_wakeup(sc);
1075
1076         mutex_lock(&sc->mutex);
1077
1078         /* setup initial channel */
1079         sc->chan_idx = curchan->hw_value;
1080
1081         init_channel = ath9k_cmn_get_curchannel(hw, ah);
1082
1083         /* Reset SERDES registers */
1084         ath9k_hw_configpcipowersave(ah, false);
1085
1086         /*
1087          * The basic interface to setting the hardware in a good
1088          * state is ``reset''.  On return the hardware is known to
1089          * be powered up and with interrupts disabled.  This must
1090          * be followed by initialization of the appropriate bits
1091          * and then setup of the interrupt mask.
1092          */
1093         spin_lock_bh(&sc->sc_pcu_lock);
1094         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1095         if (r) {
1096                 ath_err(common,
1097                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1098                         r, curchan->center_freq);
1099                 spin_unlock_bh(&sc->sc_pcu_lock);
1100                 goto mutex_unlock;
1101         }
1102
1103         /* Setup our intr mask. */
1104         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1105                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1106                     ATH9K_INT_GLOBAL;
1107
1108         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1109                 ah->imask |= ATH9K_INT_RXHP |
1110                              ATH9K_INT_RXLP |
1111                              ATH9K_INT_BB_WATCHDOG;
1112         else
1113                 ah->imask |= ATH9K_INT_RX;
1114
1115         ah->imask |= ATH9K_INT_GTT;
1116
1117         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1118                 ah->imask |= ATH9K_INT_CST;
1119
1120         sc->sc_flags &= ~SC_OP_INVALID;
1121         sc->sc_ah->is_monitoring = false;
1122
1123         /* Disable BMISS interrupt when we're not associated */
1124         ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1125
1126         if (!ath_complete_reset(sc, false)) {
1127                 r = -EIO;
1128                 spin_unlock_bh(&sc->sc_pcu_lock);
1129                 goto mutex_unlock;
1130         }
1131
1132         spin_unlock_bh(&sc->sc_pcu_lock);
1133
1134         if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1135             !ah->btcoex_hw.enabled) {
1136                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1137                                            AR_STOMP_LOW_WLAN_WGHT);
1138                 ath9k_hw_btcoex_enable(ah);
1139
1140                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1141                         ath9k_btcoex_timer_resume(sc);
1142         }
1143
1144         if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1145                 common->bus_ops->extn_synch_en(common);
1146
1147 mutex_unlock:
1148         mutex_unlock(&sc->mutex);
1149
1150         ath9k_ps_restore(sc);
1151
1152         return r;
1153 }
1154
1155 static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1156 {
1157         struct ath_softc *sc = hw->priv;
1158         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1159         struct ath_tx_control txctl;
1160         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1161
1162         if (sc->ps_enabled) {
1163                 /*
1164                  * mac80211 does not set PM field for normal data frames, so we
1165                  * need to update that based on the current PS mode.
1166                  */
1167                 if (ieee80211_is_data(hdr->frame_control) &&
1168                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1169                     !ieee80211_has_pm(hdr->frame_control)) {
1170                         ath_dbg(common, ATH_DBG_PS,
1171                                 "Add PM=1 for a TX frame while in PS mode\n");
1172                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1173                 }
1174         }
1175
1176         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1177                 /*
1178                  * We are using PS-Poll and mac80211 can request TX while in
1179                  * power save mode. Need to wake up hardware for the TX to be
1180                  * completed and if needed, also for RX of buffered frames.
1181                  */
1182                 ath9k_ps_wakeup(sc);
1183                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1184                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1185                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1186                         ath_dbg(common, ATH_DBG_PS,
1187                                 "Sending PS-Poll to pick a buffered frame\n");
1188                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1189                 } else {
1190                         ath_dbg(common, ATH_DBG_PS,
1191                                 "Wake up to complete TX\n");
1192                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1193                 }
1194                 /*
1195                  * The actual restore operation will happen only after
1196                  * the sc_flags bit is cleared. We are just dropping
1197                  * the ps_usecount here.
1198                  */
1199                 ath9k_ps_restore(sc);
1200         }
1201
1202         memset(&txctl, 0, sizeof(struct ath_tx_control));
1203         txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1204
1205         ath_dbg(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1206
1207         if (ath_tx_start(hw, skb, &txctl) != 0) {
1208                 ath_dbg(common, ATH_DBG_XMIT, "TX failed\n");
1209                 goto exit;
1210         }
1211
1212         return;
1213 exit:
1214         dev_kfree_skb_any(skb);
1215 }
1216
1217 static void ath9k_stop(struct ieee80211_hw *hw)
1218 {
1219         struct ath_softc *sc = hw->priv;
1220         struct ath_hw *ah = sc->sc_ah;
1221         struct ath_common *common = ath9k_hw_common(ah);
1222
1223         mutex_lock(&sc->mutex);
1224
1225         ath_cancel_work(sc);
1226
1227         if (sc->sc_flags & SC_OP_INVALID) {
1228                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
1229                 mutex_unlock(&sc->mutex);
1230                 return;
1231         }
1232
1233         /* Ensure HW is awake when we try to shut it down. */
1234         ath9k_ps_wakeup(sc);
1235
1236         if (ah->btcoex_hw.enabled) {
1237                 ath9k_hw_btcoex_disable(ah);
1238                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1239                         ath9k_btcoex_timer_pause(sc);
1240         }
1241
1242         spin_lock_bh(&sc->sc_pcu_lock);
1243
1244         /* prevent tasklets to enable interrupts once we disable them */
1245         ah->imask &= ~ATH9K_INT_GLOBAL;
1246
1247         /* make sure h/w will not generate any interrupt
1248          * before setting the invalid flag. */
1249         ath9k_hw_disable_interrupts(ah);
1250
1251         if (!(sc->sc_flags & SC_OP_INVALID)) {
1252                 ath_drain_all_txq(sc, false);
1253                 ath_stoprecv(sc);
1254                 ath9k_hw_phy_disable(ah);
1255         } else
1256                 sc->rx.rxlink = NULL;
1257
1258         if (sc->rx.frag) {
1259                 dev_kfree_skb_any(sc->rx.frag);
1260                 sc->rx.frag = NULL;
1261         }
1262
1263         /* disable HAL and put h/w to sleep */
1264         ath9k_hw_disable(ah);
1265
1266         spin_unlock_bh(&sc->sc_pcu_lock);
1267
1268         /* we can now sync irq and kill any running tasklets, since we already
1269          * disabled interrupts and not holding a spin lock */
1270         synchronize_irq(sc->irq);
1271         tasklet_kill(&sc->intr_tq);
1272         tasklet_kill(&sc->bcon_tasklet);
1273
1274         ath9k_ps_restore(sc);
1275
1276         sc->ps_idle = true;
1277         ath_radio_disable(sc, hw);
1278
1279         sc->sc_flags |= SC_OP_INVALID;
1280
1281         mutex_unlock(&sc->mutex);
1282
1283         ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n");
1284 }
1285
1286 bool ath9k_uses_beacons(int type)
1287 {
1288         switch (type) {
1289         case NL80211_IFTYPE_AP:
1290         case NL80211_IFTYPE_ADHOC:
1291         case NL80211_IFTYPE_MESH_POINT:
1292                 return true;
1293         default:
1294                 return false;
1295         }
1296 }
1297
1298 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1299                                  struct ieee80211_vif *vif)
1300 {
1301         struct ath_vif *avp = (void *)vif->drv_priv;
1302
1303         ath9k_set_beaconing_status(sc, false);
1304         ath_beacon_return(sc, avp);
1305         ath9k_set_beaconing_status(sc, true);
1306         sc->sc_flags &= ~SC_OP_BEACONS;
1307 }
1308
1309 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1310 {
1311         struct ath9k_vif_iter_data *iter_data = data;
1312         int i;
1313
1314         if (iter_data->hw_macaddr)
1315                 for (i = 0; i < ETH_ALEN; i++)
1316                         iter_data->mask[i] &=
1317                                 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1318
1319         switch (vif->type) {
1320         case NL80211_IFTYPE_AP:
1321                 iter_data->naps++;
1322                 break;
1323         case NL80211_IFTYPE_STATION:
1324                 iter_data->nstations++;
1325                 break;
1326         case NL80211_IFTYPE_ADHOC:
1327                 iter_data->nadhocs++;
1328                 break;
1329         case NL80211_IFTYPE_MESH_POINT:
1330                 iter_data->nmeshes++;
1331                 break;
1332         case NL80211_IFTYPE_WDS:
1333                 iter_data->nwds++;
1334                 break;
1335         default:
1336                 iter_data->nothers++;
1337                 break;
1338         }
1339 }
1340
1341 /* Called with sc->mutex held. */
1342 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1343                                struct ieee80211_vif *vif,
1344                                struct ath9k_vif_iter_data *iter_data)
1345 {
1346         struct ath_softc *sc = hw->priv;
1347         struct ath_hw *ah = sc->sc_ah;
1348         struct ath_common *common = ath9k_hw_common(ah);
1349
1350         /*
1351          * Use the hardware MAC address as reference, the hardware uses it
1352          * together with the BSSID mask when matching addresses.
1353          */
1354         memset(iter_data, 0, sizeof(*iter_data));
1355         iter_data->hw_macaddr = common->macaddr;
1356         memset(&iter_data->mask, 0xff, ETH_ALEN);
1357
1358         if (vif)
1359                 ath9k_vif_iter(iter_data, vif->addr, vif);
1360
1361         /* Get list of all active MAC addresses */
1362         ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1363                                                    iter_data);
1364 }
1365
1366 /* Called with sc->mutex held. */
1367 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1368                                           struct ieee80211_vif *vif)
1369 {
1370         struct ath_softc *sc = hw->priv;
1371         struct ath_hw *ah = sc->sc_ah;
1372         struct ath_common *common = ath9k_hw_common(ah);
1373         struct ath9k_vif_iter_data iter_data;
1374
1375         ath9k_calculate_iter_data(hw, vif, &iter_data);
1376
1377         /* Set BSSID mask. */
1378         memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1379         ath_hw_setbssidmask(common);
1380
1381         /* Set op-mode & TSF */
1382         if (iter_data.naps > 0) {
1383                 ath9k_hw_set_tsfadjust(ah, 1);
1384                 sc->sc_flags |= SC_OP_TSF_RESET;
1385                 ah->opmode = NL80211_IFTYPE_AP;
1386         } else {
1387                 ath9k_hw_set_tsfadjust(ah, 0);
1388                 sc->sc_flags &= ~SC_OP_TSF_RESET;
1389
1390                 if (iter_data.nmeshes)
1391                         ah->opmode = NL80211_IFTYPE_MESH_POINT;
1392                 else if (iter_data.nwds)
1393                         ah->opmode = NL80211_IFTYPE_AP;
1394                 else if (iter_data.nadhocs)
1395                         ah->opmode = NL80211_IFTYPE_ADHOC;
1396                 else
1397                         ah->opmode = NL80211_IFTYPE_STATION;
1398         }
1399
1400         /*
1401          * Enable MIB interrupts when there are hardware phy counters.
1402          */
1403         if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1404                 if (ah->config.enable_ani)
1405                         ah->imask |= ATH9K_INT_MIB;
1406                 ah->imask |= ATH9K_INT_TSFOOR;
1407         } else {
1408                 ah->imask &= ~ATH9K_INT_MIB;
1409                 ah->imask &= ~ATH9K_INT_TSFOOR;
1410         }
1411
1412         ath9k_hw_set_interrupts(ah);
1413
1414         /* Set up ANI */
1415         if (iter_data.naps > 0) {
1416                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1417
1418                 if (!common->disable_ani) {
1419                         sc->sc_flags |= SC_OP_ANI_RUN;
1420                         ath_start_ani(common);
1421                 }
1422
1423         } else {
1424                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1425                 del_timer_sync(&common->ani.timer);
1426         }
1427 }
1428
1429 /* Called with sc->mutex held, vif counts set up properly. */
1430 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1431                                    struct ieee80211_vif *vif)
1432 {
1433         struct ath_softc *sc = hw->priv;
1434
1435         ath9k_calculate_summary_state(hw, vif);
1436
1437         if (ath9k_uses_beacons(vif->type)) {
1438                 int error;
1439                 /* This may fail because upper levels do not have beacons
1440                  * properly configured yet.  That's OK, we assume it
1441                  * will be properly configured and then we will be notified
1442                  * in the info_changed method and set up beacons properly
1443                  * there.
1444                  */
1445                 ath9k_set_beaconing_status(sc, false);
1446                 error = ath_beacon_alloc(sc, vif);
1447                 if (!error)
1448                         ath_beacon_config(sc, vif);
1449                 ath9k_set_beaconing_status(sc, true);
1450         }
1451 }
1452
1453
1454 static int ath9k_add_interface(struct ieee80211_hw *hw,
1455                                struct ieee80211_vif *vif)
1456 {
1457         struct ath_softc *sc = hw->priv;
1458         struct ath_hw *ah = sc->sc_ah;
1459         struct ath_common *common = ath9k_hw_common(ah);
1460         int ret = 0;
1461
1462         ath9k_ps_wakeup(sc);
1463         mutex_lock(&sc->mutex);
1464
1465         switch (vif->type) {
1466         case NL80211_IFTYPE_STATION:
1467         case NL80211_IFTYPE_WDS:
1468         case NL80211_IFTYPE_ADHOC:
1469         case NL80211_IFTYPE_AP:
1470         case NL80211_IFTYPE_MESH_POINT:
1471                 break;
1472         default:
1473                 ath_err(common, "Interface type %d not yet supported\n",
1474                         vif->type);
1475                 ret = -EOPNOTSUPP;
1476                 goto out;
1477         }
1478
1479         if (ath9k_uses_beacons(vif->type)) {
1480                 if (sc->nbcnvifs >= ATH_BCBUF) {
1481                         ath_err(common, "Not enough beacon buffers when adding"
1482                                 " new interface of type: %i\n",
1483                                 vif->type);
1484                         ret = -ENOBUFS;
1485                         goto out;
1486                 }
1487         }
1488
1489         if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
1490             ((vif->type == NL80211_IFTYPE_ADHOC) &&
1491              sc->nvifs > 0)) {
1492                 ath_err(common, "Cannot create ADHOC interface when other"
1493                         " interfaces already exist.\n");
1494                 ret = -EINVAL;
1495                 goto out;
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                 struct ath9k_channel old_chan;
1671                 int pos = curchan->hw_value;
1672                 int old_pos = -1;
1673                 unsigned long flags;
1674
1675                 if (ah->curchan)
1676                         old_pos = ah->curchan - &ah->channels[0];
1677
1678                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1679                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1680                 else
1681                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1682
1683                 ath_dbg(common, ATH_DBG_CONFIG,
1684                         "Set channel: %d MHz type: %d\n",
1685                         curchan->center_freq, conf->channel_type);
1686
1687                 /* update survey stats for the old channel before switching */
1688                 spin_lock_irqsave(&common->cc_lock, flags);
1689                 ath_update_survey_stats(sc);
1690                 spin_unlock_irqrestore(&common->cc_lock, flags);
1691
1692                 /*
1693                  * Preserve the current channel values, before updating
1694                  * the same channel
1695                  */
1696                 if (old_pos == pos) {
1697                         memcpy(&old_chan, &sc->sc_ah->channels[pos],
1698                                 sizeof(struct ath9k_channel));
1699                         ah->curchan = &old_chan;
1700                 }
1701
1702                 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1703                                           curchan, conf->channel_type);
1704
1705                 /*
1706                  * If the operating channel changes, change the survey in-use flags
1707                  * along with it.
1708                  * Reset the survey data for the new channel, unless we're switching
1709                  * back to the operating channel from an off-channel operation.
1710                  */
1711                 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1712                     sc->cur_survey != &sc->survey[pos]) {
1713
1714                         if (sc->cur_survey)
1715                                 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1716
1717                         sc->cur_survey = &sc->survey[pos];
1718
1719                         memset(sc->cur_survey, 0, sizeof(struct survey_info));
1720                         sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1721                 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1722                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1723                 }
1724
1725                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1726                         ath_err(common, "Unable to set channel\n");
1727                         mutex_unlock(&sc->mutex);
1728                         return -EINVAL;
1729                 }
1730
1731                 /*
1732                  * The most recent snapshot of channel->noisefloor for the old
1733                  * channel is only available after the hardware reset. Copy it to
1734                  * the survey stats now.
1735                  */
1736                 if (old_pos >= 0)
1737                         ath_update_survey_nf(sc, old_pos);
1738         }
1739
1740         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1741                 ath_dbg(common, ATH_DBG_CONFIG,
1742                         "Set power: %d\n", conf->power_level);
1743                 sc->config.txpowlimit = 2 * conf->power_level;
1744                 ath9k_ps_wakeup(sc);
1745                 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1746                                        sc->config.txpowlimit, &sc->curtxpow);
1747                 ath9k_ps_restore(sc);
1748         }
1749
1750         if (disable_radio) {
1751                 ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1752                 ath_radio_disable(sc, hw);
1753         }
1754
1755         mutex_unlock(&sc->mutex);
1756
1757         return 0;
1758 }
1759
1760 #define SUPPORTED_FILTERS                       \
1761         (FIF_PROMISC_IN_BSS |                   \
1762         FIF_ALLMULTI |                          \
1763         FIF_CONTROL |                           \
1764         FIF_PSPOLL |                            \
1765         FIF_OTHER_BSS |                         \
1766         FIF_BCN_PRBRESP_PROMISC |               \
1767         FIF_PROBE_REQ |                         \
1768         FIF_FCSFAIL)
1769
1770 /* FIXME: sc->sc_full_reset ? */
1771 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1772                                    unsigned int changed_flags,
1773                                    unsigned int *total_flags,
1774                                    u64 multicast)
1775 {
1776         struct ath_softc *sc = hw->priv;
1777         u32 rfilt;
1778
1779         changed_flags &= SUPPORTED_FILTERS;
1780         *total_flags &= SUPPORTED_FILTERS;
1781
1782         sc->rx.rxfilter = *total_flags;
1783         ath9k_ps_wakeup(sc);
1784         rfilt = ath_calcrxfilter(sc);
1785         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1786         ath9k_ps_restore(sc);
1787
1788         ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1789                 "Set HW RX filter: 0x%x\n", rfilt);
1790 }
1791
1792 static int ath9k_sta_add(struct ieee80211_hw *hw,
1793                          struct ieee80211_vif *vif,
1794                          struct ieee80211_sta *sta)
1795 {
1796         struct ath_softc *sc = hw->priv;
1797         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1798         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1799         struct ieee80211_key_conf ps_key = { };
1800
1801         ath_node_attach(sc, sta);
1802
1803         if (vif->type != NL80211_IFTYPE_AP &&
1804             vif->type != NL80211_IFTYPE_AP_VLAN)
1805                 return 0;
1806
1807         an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1808
1809         return 0;
1810 }
1811
1812 static void ath9k_del_ps_key(struct ath_softc *sc,
1813                              struct ieee80211_vif *vif,
1814                              struct ieee80211_sta *sta)
1815 {
1816         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1817         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1818         struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1819
1820         if (!an->ps_key)
1821             return;
1822
1823         ath_key_delete(common, &ps_key);
1824 }
1825
1826 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1827                             struct ieee80211_vif *vif,
1828                             struct ieee80211_sta *sta)
1829 {
1830         struct ath_softc *sc = hw->priv;
1831
1832         ath9k_del_ps_key(sc, vif, sta);
1833         ath_node_detach(sc, sta);
1834
1835         return 0;
1836 }
1837
1838 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1839                          struct ieee80211_vif *vif,
1840                          enum sta_notify_cmd cmd,
1841                          struct ieee80211_sta *sta)
1842 {
1843         struct ath_softc *sc = hw->priv;
1844         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1845
1846         switch (cmd) {
1847         case STA_NOTIFY_SLEEP:
1848                 an->sleeping = true;
1849                 ath_tx_aggr_sleep(sta, sc, an);
1850                 break;
1851         case STA_NOTIFY_AWAKE:
1852                 an->sleeping = false;
1853                 ath_tx_aggr_wakeup(sc, an);
1854                 break;
1855         }
1856 }
1857
1858 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1859                          struct ieee80211_vif *vif, u16 queue,
1860                          const struct ieee80211_tx_queue_params *params)
1861 {
1862         struct ath_softc *sc = hw->priv;
1863         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1864         struct ath_txq *txq;
1865         struct ath9k_tx_queue_info qi;
1866         int ret = 0;
1867
1868         if (queue >= WME_NUM_AC)
1869                 return 0;
1870
1871         txq = sc->tx.txq_map[queue];
1872
1873         ath9k_ps_wakeup(sc);
1874         mutex_lock(&sc->mutex);
1875
1876         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1877
1878         qi.tqi_aifs = params->aifs;
1879         qi.tqi_cwmin = params->cw_min;
1880         qi.tqi_cwmax = params->cw_max;
1881         qi.tqi_burstTime = params->txop;
1882
1883         ath_dbg(common, ATH_DBG_CONFIG,
1884                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1885                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1886                 params->cw_max, params->txop);
1887
1888         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1889         if (ret)
1890                 ath_err(common, "TXQ Update failed\n");
1891
1892         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1893                 if (queue == WME_AC_BE && !ret)
1894                         ath_beaconq_config(sc);
1895
1896         mutex_unlock(&sc->mutex);
1897         ath9k_ps_restore(sc);
1898
1899         return ret;
1900 }
1901
1902 static int ath9k_set_key(struct ieee80211_hw *hw,
1903                          enum set_key_cmd cmd,
1904                          struct ieee80211_vif *vif,
1905                          struct ieee80211_sta *sta,
1906                          struct ieee80211_key_conf *key)
1907 {
1908         struct ath_softc *sc = hw->priv;
1909         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1910         int ret = 0;
1911
1912         if (ath9k_modparam_nohwcrypt)
1913                 return -ENOSPC;
1914
1915         if (vif->type == NL80211_IFTYPE_ADHOC &&
1916             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1917              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1918             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1919                 /*
1920                  * For now, disable hw crypto for the RSN IBSS group keys. This
1921                  * could be optimized in the future to use a modified key cache
1922                  * design to support per-STA RX GTK, but until that gets
1923                  * implemented, use of software crypto for group addressed
1924                  * frames is a acceptable to allow RSN IBSS to be used.
1925                  */
1926                 return -EOPNOTSUPP;
1927         }
1928
1929         mutex_lock(&sc->mutex);
1930         ath9k_ps_wakeup(sc);
1931         ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");
1932
1933         switch (cmd) {
1934         case SET_KEY:
1935                 if (sta)
1936                         ath9k_del_ps_key(sc, vif, sta);
1937
1938                 ret = ath_key_config(common, vif, sta, key);
1939                 if (ret >= 0) {
1940                         key->hw_key_idx = ret;
1941                         /* push IV and Michael MIC generation to stack */
1942                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1943                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1944                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1945                         if (sc->sc_ah->sw_mgmt_crypto &&
1946                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1947                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1948                         ret = 0;
1949                 }
1950                 break;
1951         case DISABLE_KEY:
1952                 ath_key_delete(common, key);
1953                 break;
1954         default:
1955                 ret = -EINVAL;
1956         }
1957
1958         ath9k_ps_restore(sc);
1959         mutex_unlock(&sc->mutex);
1960
1961         return ret;
1962 }
1963 static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1964 {
1965         struct ath_softc *sc = data;
1966         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1967         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1968         struct ath_vif *avp = (void *)vif->drv_priv;
1969
1970         /*
1971          * Skip iteration if primary station vif's bss info
1972          * was not changed
1973          */
1974         if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1975                 return;
1976
1977         if (bss_conf->assoc) {
1978                 sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1979                 avp->primary_sta_vif = true;
1980                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1981                 common->curaid = bss_conf->aid;
1982                 ath9k_hw_write_associd(sc->sc_ah);
1983                 ath_dbg(common, ATH_DBG_CONFIG,
1984                                 "Bss Info ASSOC %d, bssid: %pM\n",
1985                                 bss_conf->aid, common->curbssid);
1986                 ath_beacon_config(sc, vif);
1987                 /*
1988                  * Request a re-configuration of Beacon related timers
1989                  * on the receipt of the first Beacon frame (i.e.,
1990                  * after time sync with the AP).
1991                  */
1992                 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1993                 /* Reset rssi stats */
1994                 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
1995                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1996
1997                 if (!common->disable_ani) {
1998                         sc->sc_flags |= SC_OP_ANI_RUN;
1999                         ath_start_ani(common);
2000                 }
2001
2002         }
2003 }
2004
2005 static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
2006 {
2007         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2008         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2009         struct ath_vif *avp = (void *)vif->drv_priv;
2010
2011         if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
2012                 return;
2013
2014         /* Reconfigure bss info */
2015         if (avp->primary_sta_vif && !bss_conf->assoc) {
2016                 ath_dbg(common, ATH_DBG_CONFIG,
2017                         "Bss Info DISASSOC %d, bssid %pM\n",
2018                         common->curaid, common->curbssid);
2019                 sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
2020                 avp->primary_sta_vif = false;
2021                 memset(common->curbssid, 0, ETH_ALEN);
2022                 common->curaid = 0;
2023         }
2024
2025         ieee80211_iterate_active_interfaces_atomic(
2026                         sc->hw, ath9k_bss_iter, sc);
2027
2028         /*
2029          * None of station vifs are associated.
2030          * Clear bssid & aid
2031          */
2032         if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
2033                 ath9k_hw_write_associd(sc->sc_ah);
2034                 /* Stop ANI */
2035                 sc->sc_flags &= ~SC_OP_ANI_RUN;
2036                 del_timer_sync(&common->ani.timer);
2037                 memset(&sc->caldata, 0, sizeof(sc->caldata));
2038         }
2039 }
2040
2041 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
2042                                    struct ieee80211_vif *vif,
2043                                    struct ieee80211_bss_conf *bss_conf,
2044                                    u32 changed)
2045 {
2046         struct ath_softc *sc = hw->priv;
2047         struct ath_hw *ah = sc->sc_ah;
2048         struct ath_common *common = ath9k_hw_common(ah);
2049         struct ath_vif *avp = (void *)vif->drv_priv;
2050         int slottime;
2051         int error;
2052
2053         ath9k_ps_wakeup(sc);
2054         mutex_lock(&sc->mutex);
2055
2056         if (changed & BSS_CHANGED_BSSID) {
2057                 ath9k_config_bss(sc, vif);
2058
2059                 ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n",
2060                         common->curbssid, common->curaid);
2061         }
2062
2063         if (changed & BSS_CHANGED_IBSS) {
2064                 /* There can be only one vif available */
2065                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2066                 common->curaid = bss_conf->aid;
2067                 ath9k_hw_write_associd(sc->sc_ah);
2068
2069                 if (bss_conf->ibss_joined) {
2070                         sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2071
2072                         if (!common->disable_ani) {
2073                                 sc->sc_flags |= SC_OP_ANI_RUN;
2074                                 ath_start_ani(common);
2075                         }
2076
2077                 } else {
2078                         sc->sc_flags &= ~SC_OP_ANI_RUN;
2079                         del_timer_sync(&common->ani.timer);
2080                 }
2081         }
2082
2083         /* Enable transmission of beacons (AP, IBSS, MESH) */
2084         if ((changed & BSS_CHANGED_BEACON) ||
2085             ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
2086                 ath9k_set_beaconing_status(sc, false);
2087                 error = ath_beacon_alloc(sc, vif);
2088                 if (!error)
2089                         ath_beacon_config(sc, vif);
2090                 ath9k_set_beaconing_status(sc, true);
2091         }
2092
2093         if (changed & BSS_CHANGED_ERP_SLOT) {
2094                 if (bss_conf->use_short_slot)
2095                         slottime = 9;
2096                 else
2097                         slottime = 20;
2098                 if (vif->type == NL80211_IFTYPE_AP) {
2099                         /*
2100                          * Defer update, so that connected stations can adjust
2101                          * their settings at the same time.
2102                          * See beacon.c for more details
2103                          */
2104                         sc->beacon.slottime = slottime;
2105                         sc->beacon.updateslot = UPDATE;
2106                 } else {
2107                         ah->slottime = slottime;
2108                         ath9k_hw_init_global_settings(ah);
2109                 }
2110         }
2111
2112         /* Disable transmission of beacons */
2113         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
2114             !bss_conf->enable_beacon) {
2115                 ath9k_set_beaconing_status(sc, false);
2116                 avp->is_bslot_active = false;
2117                 ath9k_set_beaconing_status(sc, true);
2118         }
2119
2120         if (changed & BSS_CHANGED_BEACON_INT) {
2121                 /*
2122                  * In case of AP mode, the HW TSF has to be reset
2123                  * when the beacon interval changes.
2124                  */
2125                 if (vif->type == NL80211_IFTYPE_AP) {
2126                         sc->sc_flags |= SC_OP_TSF_RESET;
2127                         ath9k_set_beaconing_status(sc, false);
2128                         error = ath_beacon_alloc(sc, vif);
2129                         if (!error)
2130                                 ath_beacon_config(sc, vif);
2131                         ath9k_set_beaconing_status(sc, true);
2132                 } else
2133                         ath_beacon_config(sc, vif);
2134         }
2135
2136         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
2137                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
2138                         bss_conf->use_short_preamble);
2139                 if (bss_conf->use_short_preamble)
2140                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
2141                 else
2142                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2143         }
2144
2145         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2146                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
2147                         bss_conf->use_cts_prot);
2148                 if (bss_conf->use_cts_prot &&
2149                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2150                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2151                 else
2152                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2153         }
2154
2155         mutex_unlock(&sc->mutex);
2156         ath9k_ps_restore(sc);
2157 }
2158
2159 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2160 {
2161         struct ath_softc *sc = hw->priv;
2162         u64 tsf;
2163
2164         mutex_lock(&sc->mutex);
2165         ath9k_ps_wakeup(sc);
2166         tsf = ath9k_hw_gettsf64(sc->sc_ah);
2167         ath9k_ps_restore(sc);
2168         mutex_unlock(&sc->mutex);
2169
2170         return tsf;
2171 }
2172
2173 static void ath9k_set_tsf(struct ieee80211_hw *hw,
2174                           struct ieee80211_vif *vif,
2175                           u64 tsf)
2176 {
2177         struct ath_softc *sc = hw->priv;
2178
2179         mutex_lock(&sc->mutex);
2180         ath9k_ps_wakeup(sc);
2181         ath9k_hw_settsf64(sc->sc_ah, tsf);
2182         ath9k_ps_restore(sc);
2183         mutex_unlock(&sc->mutex);
2184 }
2185
2186 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2187 {
2188         struct ath_softc *sc = hw->priv;
2189
2190         mutex_lock(&sc->mutex);
2191
2192         ath9k_ps_wakeup(sc);
2193         ath9k_hw_reset_tsf(sc->sc_ah);
2194         ath9k_ps_restore(sc);
2195
2196         mutex_unlock(&sc->mutex);
2197 }
2198
2199 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2200                               struct ieee80211_vif *vif,
2201                               enum ieee80211_ampdu_mlme_action action,
2202                               struct ieee80211_sta *sta,
2203                               u16 tid, u16 *ssn, u8 buf_size)
2204 {
2205         struct ath_softc *sc = hw->priv;
2206         int ret = 0;
2207
2208         local_bh_disable();
2209
2210         switch (action) {
2211         case IEEE80211_AMPDU_RX_START:
2212                 if (!(sc->sc_flags & SC_OP_RXAGGR))
2213                         ret = -ENOTSUPP;
2214                 break;
2215         case IEEE80211_AMPDU_RX_STOP:
2216                 break;
2217         case IEEE80211_AMPDU_TX_START:
2218                 if (!(sc->sc_flags & SC_OP_TXAGGR))
2219                         return -EOPNOTSUPP;
2220
2221                 ath9k_ps_wakeup(sc);
2222                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2223                 if (!ret)
2224                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2225                 ath9k_ps_restore(sc);
2226                 break;
2227         case IEEE80211_AMPDU_TX_STOP:
2228                 ath9k_ps_wakeup(sc);
2229                 ath_tx_aggr_stop(sc, sta, tid);
2230                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2231                 ath9k_ps_restore(sc);
2232                 break;
2233         case IEEE80211_AMPDU_TX_OPERATIONAL:
2234                 ath9k_ps_wakeup(sc);
2235                 ath_tx_aggr_resume(sc, sta, tid);
2236                 ath9k_ps_restore(sc);
2237                 break;
2238         default:
2239                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2240         }
2241
2242         local_bh_enable();
2243
2244         return ret;
2245 }
2246
2247 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2248                              struct survey_info *survey)
2249 {
2250         struct ath_softc *sc = hw->priv;
2251         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2252         struct ieee80211_supported_band *sband;
2253         struct ieee80211_channel *chan;
2254         unsigned long flags;
2255         int pos;
2256
2257         spin_lock_irqsave(&common->cc_lock, flags);
2258         if (idx == 0)
2259                 ath_update_survey_stats(sc);
2260
2261         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2262         if (sband && idx >= sband->n_channels) {
2263                 idx -= sband->n_channels;
2264                 sband = NULL;
2265         }
2266
2267         if (!sband)
2268                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2269
2270         if (!sband || idx >= sband->n_channels) {
2271                 spin_unlock_irqrestore(&common->cc_lock, flags);
2272                 return -ENOENT;
2273         }
2274
2275         chan = &sband->channels[idx];
2276         pos = chan->hw_value;
2277         memcpy(survey, &sc->survey[pos], sizeof(*survey));
2278         survey->channel = chan;
2279         spin_unlock_irqrestore(&common->cc_lock, flags);
2280
2281         return 0;
2282 }
2283
2284 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2285 {
2286         struct ath_softc *sc = hw->priv;
2287         struct ath_hw *ah = sc->sc_ah;
2288
2289         mutex_lock(&sc->mutex);
2290         ah->coverage_class = coverage_class;
2291
2292         ath9k_ps_wakeup(sc);
2293         ath9k_hw_init_global_settings(ah);
2294         ath9k_ps_restore(sc);
2295
2296         mutex_unlock(&sc->mutex);
2297 }
2298
2299 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
2300 {
2301         struct ath_softc *sc = hw->priv;
2302         struct ath_hw *ah = sc->sc_ah;
2303         struct ath_common *common = ath9k_hw_common(ah);
2304         int timeout = 200; /* ms */
2305         int i, j;
2306         bool drain_txq;
2307
2308         mutex_lock(&sc->mutex);
2309         cancel_delayed_work_sync(&sc->tx_complete_work);
2310
2311         if (ah->ah_flags & AH_UNPLUGGED) {
2312                 ath_dbg(common, ATH_DBG_ANY, "Device has been unplugged!\n");
2313                 mutex_unlock(&sc->mutex);
2314                 return;
2315         }
2316
2317         if (sc->sc_flags & SC_OP_INVALID) {
2318                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
2319                 mutex_unlock(&sc->mutex);
2320                 return;
2321         }
2322
2323         if (drop)
2324                 timeout = 1;
2325
2326         for (j = 0; j < timeout; j++) {
2327                 bool npend = false;
2328
2329                 if (j)
2330                         usleep_range(1000, 2000);
2331
2332                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2333                         if (!ATH_TXQ_SETUP(sc, i))
2334                                 continue;
2335
2336                         npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2337
2338                         if (npend)
2339                                 break;
2340                 }
2341
2342                 if (!npend)
2343                     goto out;
2344         }
2345
2346         ath9k_ps_wakeup(sc);
2347         spin_lock_bh(&sc->sc_pcu_lock);
2348         drain_txq = ath_drain_all_txq(sc, false);
2349         spin_unlock_bh(&sc->sc_pcu_lock);
2350
2351         if (!drain_txq)
2352                 ath_reset(sc, false);
2353
2354         ath9k_ps_restore(sc);
2355         ieee80211_wake_queues(hw);
2356
2357 out:
2358         ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2359         mutex_unlock(&sc->mutex);
2360 }
2361
2362 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2363 {
2364         struct ath_softc *sc = hw->priv;
2365         int i;
2366
2367         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2368                 if (!ATH_TXQ_SETUP(sc, i))
2369                         continue;
2370
2371                 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2372                         return true;
2373         }
2374         return false;
2375 }
2376
2377 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2378 {
2379         struct ath_softc *sc = hw->priv;
2380         struct ath_hw *ah = sc->sc_ah;
2381         struct ieee80211_vif *vif;
2382         struct ath_vif *avp;
2383         struct ath_buf *bf;
2384         struct ath_tx_status ts;
2385         int status;
2386
2387         vif = sc->beacon.bslot[0];
2388         if (!vif)
2389                 return 0;
2390
2391         avp = (void *)vif->drv_priv;
2392         if (!avp->is_bslot_active)
2393                 return 0;
2394
2395         if (!sc->beacon.tx_processed) {
2396                 tasklet_disable(&sc->bcon_tasklet);
2397
2398                 bf = avp->av_bcbuf;
2399                 if (!bf || !bf->bf_mpdu)
2400                         goto skip;
2401
2402                 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2403                 if (status == -EINPROGRESS)
2404                         goto skip;
2405
2406                 sc->beacon.tx_processed = true;
2407                 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2408
2409 skip:
2410                 tasklet_enable(&sc->bcon_tasklet);
2411         }
2412
2413         return sc->beacon.tx_last;
2414 }
2415
2416 static int ath9k_get_stats(struct ieee80211_hw *hw,
2417                            struct ieee80211_low_level_stats *stats)
2418 {
2419         struct ath_softc *sc = hw->priv;
2420         struct ath_hw *ah = sc->sc_ah;
2421         struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2422
2423         stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2424         stats->dot11RTSFailureCount = mib_stats->rts_bad;
2425         stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2426         stats->dot11RTSSuccessCount = mib_stats->rts_good;
2427         return 0;
2428 }
2429
2430 static u32 fill_chainmask(u32 cap, u32 new)
2431 {
2432         u32 filled = 0;
2433         int i;
2434
2435         for (i = 0; cap && new; i++, cap >>= 1) {
2436                 if (!(cap & BIT(0)))
2437                         continue;
2438
2439                 if (new & BIT(0))
2440                         filled |= BIT(i);
2441
2442                 new >>= 1;
2443         }
2444
2445         return filled;
2446 }
2447
2448 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2449 {
2450         struct ath_softc *sc = hw->priv;
2451         struct ath_hw *ah = sc->sc_ah;
2452
2453         if (!rx_ant || !tx_ant)
2454                 return -EINVAL;
2455
2456         sc->ant_rx = rx_ant;
2457         sc->ant_tx = tx_ant;
2458
2459         if (ah->caps.rx_chainmask == 1)
2460                 return 0;
2461
2462         /* AR9100 runs into calibration issues if not all rx chains are enabled */
2463         if (AR_SREV_9100(ah))
2464                 ah->rxchainmask = 0x7;
2465         else
2466                 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2467
2468         ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2469         ath9k_reload_chainmask_settings(sc);
2470
2471         return 0;
2472 }
2473
2474 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2475 {
2476         struct ath_softc *sc = hw->priv;
2477
2478         *tx_ant = sc->ant_tx;
2479         *rx_ant = sc->ant_rx;
2480         return 0;
2481 }
2482
2483 struct ieee80211_ops ath9k_ops = {
2484         .tx                 = ath9k_tx,
2485         .start              = ath9k_start,
2486         .stop               = ath9k_stop,
2487         .add_interface      = ath9k_add_interface,
2488         .change_interface   = ath9k_change_interface,
2489         .remove_interface   = ath9k_remove_interface,
2490         .config             = ath9k_config,
2491         .configure_filter   = ath9k_configure_filter,
2492         .sta_add            = ath9k_sta_add,
2493         .sta_remove         = ath9k_sta_remove,
2494         .sta_notify         = ath9k_sta_notify,
2495         .conf_tx            = ath9k_conf_tx,
2496         .bss_info_changed   = ath9k_bss_info_changed,
2497         .set_key            = ath9k_set_key,
2498         .get_tsf            = ath9k_get_tsf,
2499         .set_tsf            = ath9k_set_tsf,
2500         .reset_tsf          = ath9k_reset_tsf,
2501         .ampdu_action       = ath9k_ampdu_action,
2502         .get_survey         = ath9k_get_survey,
2503         .rfkill_poll        = ath9k_rfkill_poll_state,
2504         .set_coverage_class = ath9k_set_coverage_class,
2505         .flush              = ath9k_flush,
2506         .tx_frames_pending  = ath9k_tx_frames_pending,
2507         .tx_last_beacon     = ath9k_tx_last_beacon,
2508         .get_stats          = ath9k_get_stats,
2509         .set_antenna        = ath9k_set_antenna,
2510         .get_antenna        = ath9k_get_antenna,
2511 };