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

   1 /*
   2  * Copyright (c) 2008-2009 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/nl80211.h>
  18 #include "ath9k.h"
  19 #include "btcoex.h"
  20
  21 static char *dev_info = "ath9k";
  22
  23 MODULE_AUTHOR("Atheros Communications");
  24 MODULE_DESCRIPTION("Support for Atheros 802.11n wireless LAN cards.");
  25 MODULE_SUPPORTED_DEVICE("Atheros 802.11n WLAN cards");
  26 MODULE_LICENSE("Dual BSD/GPL");
  27
  28 static int modparam_nohwcrypt;
  29 module_param_named(nohwcrypt, modparam_nohwcrypt, int, 0444);
  30 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption");
  31
  32 /* We use the hw_value as an index into our private channel structure */
  33
  34 #define CHAN2G(_freq, _idx)  { \
  35         .center_freq = (_freq), \
  36         .hw_value = (_idx), \
  37         .max_power = 20, \
  38 }
  39
  40 #define CHAN5G(_freq, _idx) { \
  41         .band = IEEE80211_BAND_5GHZ, \
  42         .center_freq = (_freq), \
  43         .hw_value = (_idx), \
  44         .max_power = 20, \
  45 }
  46
  47 /* Some 2 GHz radios are actually tunable on 2312-2732
  48  * on 5 MHz steps, we support the channels which we know
  49  * we have calibration data for all cards though to make
  50  * this static */
  51 static struct ieee80211_channel ath9k_2ghz_chantable[] = {
  52         CHAN2G(2412, 0), /* Channel 1 */
  53         CHAN2G(2417, 1), /* Channel 2 */
  54         CHAN2G(2422, 2), /* Channel 3 */
  55         CHAN2G(2427, 3), /* Channel 4 */
  56         CHAN2G(2432, 4), /* Channel 5 */
  57         CHAN2G(2437, 5), /* Channel 6 */
  58         CHAN2G(2442, 6), /* Channel 7 */
  59         CHAN2G(2447, 7), /* Channel 8 */
  60         CHAN2G(2452, 8), /* Channel 9 */
  61         CHAN2G(2457, 9), /* Channel 10 */
  62         CHAN2G(2462, 10), /* Channel 11 */
  63         CHAN2G(2467, 11), /* Channel 12 */
  64         CHAN2G(2472, 12), /* Channel 13 */
  65         CHAN2G(2484, 13), /* Channel 14 */
  66 };
  67
  68 /* Some 5 GHz radios are actually tunable on XXXX-YYYY
  69  * on 5 MHz steps, we support the channels which we know
  70  * we have calibration data for all cards though to make
  71  * this static */
  72 static struct ieee80211_channel ath9k_5ghz_chantable[] = {
  73         /* _We_ call this UNII 1 */
  74         CHAN5G(5180, 14), /* Channel 36 */
  75         CHAN5G(5200, 15), /* Channel 40 */
  76         CHAN5G(5220, 16), /* Channel 44 */
  77         CHAN5G(5240, 17), /* Channel 48 */
  78         /* _We_ call this UNII 2 */
  79         CHAN5G(5260, 18), /* Channel 52 */
  80         CHAN5G(5280, 19), /* Channel 56 */
  81         CHAN5G(5300, 20), /* Channel 60 */
  82         CHAN5G(5320, 21), /* Channel 64 */
  83         /* _We_ call this "Middle band" */
  84         CHAN5G(5500, 22), /* Channel 100 */
  85         CHAN5G(5520, 23), /* Channel 104 */
  86         CHAN5G(5540, 24), /* Channel 108 */
  87         CHAN5G(5560, 25), /* Channel 112 */
  88         CHAN5G(5580, 26), /* Channel 116 */
  89         CHAN5G(5600, 27), /* Channel 120 */
  90         CHAN5G(5620, 28), /* Channel 124 */
  91         CHAN5G(5640, 29), /* Channel 128 */
  92         CHAN5G(5660, 30), /* Channel 132 */
  93         CHAN5G(5680, 31), /* Channel 136 */
  94         CHAN5G(5700, 32), /* Channel 140 */
  95         /* _We_ call this UNII 3 */
  96         CHAN5G(5745, 33), /* Channel 149 */
  97         CHAN5G(5765, 34), /* Channel 153 */
  98         CHAN5G(5785, 35), /* Channel 157 */
  99         CHAN5G(5805, 36), /* Channel 161 */
 100         CHAN5G(5825, 37), /* Channel 165 */
 101 };
 102
 103 static void ath_cache_conf_rate(struct ath_softc *sc,
 104                                 struct ieee80211_conf *conf)
 105 {
 106         switch (conf->channel->band) {
 107         case IEEE80211_BAND_2GHZ:
 108                 if (conf_is_ht20(conf))
 109                         sc->cur_rate_table =
 110                           sc->hw_rate_table[ATH9K_MODE_11NG_HT20];
 111                 else if (conf_is_ht40_minus(conf))
 112                         sc->cur_rate_table =
 113                           sc->hw_rate_table[ATH9K_MODE_11NG_HT40MINUS];
 114                 else if (conf_is_ht40_plus(conf))
 115                         sc->cur_rate_table =
 116                           sc->hw_rate_table[ATH9K_MODE_11NG_HT40PLUS];
 117                 else
 118                         sc->cur_rate_table =
 119                           sc->hw_rate_table[ATH9K_MODE_11G];
 120                 break;
 121         case IEEE80211_BAND_5GHZ:
 122                 if (conf_is_ht20(conf))
 123                         sc->cur_rate_table =
 124                           sc->hw_rate_table[ATH9K_MODE_11NA_HT20];
 125                 else if (conf_is_ht40_minus(conf))
 126                         sc->cur_rate_table =
 127                           sc->hw_rate_table[ATH9K_MODE_11NA_HT40MINUS];
 128                 else if (conf_is_ht40_plus(conf))
 129                         sc->cur_rate_table =
 130                           sc->hw_rate_table[ATH9K_MODE_11NA_HT40PLUS];
 131                 else
 132                         sc->cur_rate_table =
 133                           sc->hw_rate_table[ATH9K_MODE_11A];
 134                 break;
 135         default:
 136                 BUG_ON(1);
 137                 break;
 138         }
 139 }
 140
 141 static void ath_update_txpow(struct ath_softc *sc)
 142 {
 143         struct ath_hw *ah = sc->sc_ah;
 144         u32 txpow;
 145
 146         if (sc->curtxpow != sc->config.txpowlimit) {
 147                 ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit);
 148                 /* read back in case value is clamped */
 149                 ath9k_hw_getcapability(ah, ATH9K_CAP_TXPOW, 1, &txpow);
 150                 sc->curtxpow = txpow;
 151         }
 152 }
 153
 154 static u8 parse_mpdudensity(u8 mpdudensity)
 155 {
 156         /*
 157          * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
 158          *   0 for no restriction
 159          *   1 for 1/4 us
 160          *   2 for 1/2 us
 161          *   3 for 1 us
 162          *   4 for 2 us
 163          *   5 for 4 us
 164          *   6 for 8 us
 165          *   7 for 16 us
 166          */
 167         switch (mpdudensity) {
 168         case 0:
 169                 return 0;
 170         case 1:
 171         case 2:
 172         case 3:
 173                 /* Our lower layer calculations limit our precision to
 174                    1 microsecond */
 175                 return 1;
 176         case 4:
 177                 return 2;
 178         case 5:
 179                 return 4;
 180         case 6:
 181                 return 8;
 182         case 7:
 183                 return 16;
 184         default:
 185                 return 0;
 186         }
 187 }
 188
 189 static void ath_setup_rates(struct ath_softc *sc, enum ieee80211_band band)
 190 {
 191         const struct ath_rate_table *rate_table = NULL;
 192         struct ieee80211_supported_band *sband;
 193         struct ieee80211_rate *rate;
 194         int i, maxrates;
 195
 196         switch (band) {
 197         case IEEE80211_BAND_2GHZ:
 198                 rate_table = sc->hw_rate_table[ATH9K_MODE_11G];
 199                 break;
 200         case IEEE80211_BAND_5GHZ:
 201                 rate_table = sc->hw_rate_table[ATH9K_MODE_11A];
 202                 break;
 203         default:
 204                 break;
 205         }
 206
 207         if (rate_table == NULL)
 208                 return;
 209
 210         sband = &sc->sbands[band];
 211         rate = sc->rates[band];
 212
 213         if (rate_table->rate_cnt > ATH_RATE_MAX)
 214                 maxrates = ATH_RATE_MAX;
 215         else
 216                 maxrates = rate_table->rate_cnt;
 217
 218         for (i = 0; i < maxrates; i++) {
 219                 rate[i].bitrate = rate_table->info[i].ratekbps / 100;
 220                 rate[i].hw_value = rate_table->info[i].ratecode;
 221                 if (rate_table->info[i].short_preamble) {
 222                         rate[i].hw_value_short = rate_table->info[i].ratecode |
 223                                 rate_table->info[i].short_preamble;
 224                         rate[i].flags = IEEE80211_RATE_SHORT_PREAMBLE;
 225                 }
 226                 sband->n_bitrates++;
 227
 228                 DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "Rate: %2dMbps, ratecode: %2d\n",
 229                         rate[i].bitrate / 10, rate[i].hw_value);
 230         }
 231 }
 232
 233 static struct ath9k_channel *ath_get_curchannel(struct ath_softc *sc,
 234                                                 struct ieee80211_hw *hw)
 235 {
 236         struct ieee80211_channel *curchan = hw->conf.channel;
 237         struct ath9k_channel *channel;
 238         u8 chan_idx;
 239
 240         chan_idx = curchan->hw_value;
 241         channel = &sc->sc_ah->channels[chan_idx];
 242         ath9k_update_ichannel(sc, hw, channel);
 243         return channel;
 244 }
 245
 246 /*
 247  * Set/change channels.  If the channel is really being changed, it's done
 248  * by reseting the chip.  To accomplish this we must first cleanup any pending
 249  * DMA, then restart stuff.
 250 */
 251 int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 252                     struct ath9k_channel *hchan)
 253 {
 254         struct ath_hw *ah = sc->sc_ah;
 255         bool fastcc = true, stopped;
 256         struct ieee80211_channel *channel = hw->conf.channel;
 257         int r;
 258
 259         if (sc->sc_flags & SC_OP_INVALID)
 260                 return -EIO;
 261
 262         ath9k_ps_wakeup(sc);
 263
 264         /*
 265          * This is only performed if the channel settings have
 266          * actually changed.
 267          *
 268          * To switch channels clear any pending DMA operations;
 269          * wait long enough for the RX fifo to drain, reset the
 270          * hardware at the new frequency, and then re-enable
 271          * the relevant bits of the h/w.
 272          */
 273         ath9k_hw_set_interrupts(ah, 0);
 274         ath_drain_all_txq(sc, false);
 275         stopped = ath_stoprecv(sc);
 276
 277         /* XXX: do not flush receive queue here. We don't want
 278          * to flush data frames already in queue because of
 279          * changing channel. */
 280
 281         if (!stopped || (sc->sc_flags & SC_OP_FULL_RESET))
 282                 fastcc = false;
 283
 284         DPRINTF(sc->sc_ah, ATH_DBG_CONFIG,
 285                 "(%u MHz) -> (%u MHz), chanwidth: %d\n",
 286                 sc->sc_ah->curchan->channel,
 287                 channel->center_freq, sc->tx_chan_width);
 288
 289         spin_lock_bh(&sc->sc_resetlock);
 290
 291         r = ath9k_hw_reset(ah, hchan, fastcc);
 292         if (r) {
 293                 DPRINTF(sc->sc_ah, ATH_DBG_FATAL,
 294                         "Unable to reset channel (%u Mhz) "
 295                         "reset status %d\n",
 296                         channel->center_freq, r);
 297                 spin_unlock_bh(&sc->sc_resetlock);
 298                 goto ps_restore;
 299         }
 300         spin_unlock_bh(&sc->sc_resetlock);
 301
 302         sc->sc_flags &= ~SC_OP_FULL_RESET;
 303
 304         if (ath_startrecv(sc) != 0) {
 305                 DPRINTF(sc->sc_ah, ATH_DBG_FATAL,
 306                         "Unable to restart recv logic\n");
 307                 r = -EIO;
 308                 goto ps_restore;
 309         }
 310
 311         ath_cache_conf_rate(sc, &hw->conf);
 312         ath_update_txpow(sc);
 313         ath9k_hw_set_interrupts(ah, sc->imask);
 314
 315  ps_restore:
 316         ath9k_ps_restore(sc);
 317         return r;
 318 }
 319
 320 /*
 321  *  This routine performs the periodic noise floor calibration function
 322  *  that is used to adjust and optimize the chip performance.  This
 323  *  takes environmental changes (location, temperature) into account.
 324  *  When the task is complete, it reschedules itself depending on the
 325  *  appropriate interval that was calculated.
 326  */
 327 static void ath_ani_calibrate(unsigned long data)
 328 {
 329         struct ath_softc *sc = (struct ath_softc *)data;
 330         struct ath_hw *ah = sc->sc_ah;
 331         bool longcal = false;
 332         bool shortcal = false;
 333         bool aniflag = false;
 334         unsigned int timestamp = jiffies_to_msecs(jiffies);
 335         u32 cal_interval, short_cal_interval;
 336
 337         short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
 338                 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
 339
 340         /*
 341         * don't calibrate when we're scanning.
 342         * we are most likely not on our home channel.
 343         */
 344         spin_lock(&sc->ani_lock);
 345         if (sc->sc_flags & SC_OP_SCANNING)
 346                 goto set_timer;
 347
 348         /* Only calibrate if awake */
 349         if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
 350                 goto set_timer;
 351
 352         ath9k_ps_wakeup(sc);
 353
 354         /* Long calibration runs independently of short calibration. */
 355         if ((timestamp - sc->ani.longcal_timer) >= ATH_LONG_CALINTERVAL) {
 356                 longcal = true;
 357                 DPRINTF(sc->sc_ah, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
 358                 sc->ani.longcal_timer = timestamp;
 359         }
 360
 361         /* Short calibration applies only while caldone is false */
 362         if (!sc->ani.caldone) {
 363                 if ((timestamp - sc->ani.shortcal_timer) >= short_cal_interval) {
 364                         shortcal = true;
 365                         DPRINTF(sc->sc_ah, ATH_DBG_ANI, "shortcal @%lu\n", jiffies);
 366                         sc->ani.shortcal_timer = timestamp;
 367                         sc->ani.resetcal_timer = timestamp;
 368                 }
 369         } else {
 370                 if ((timestamp - sc->ani.resetcal_timer) >=
 371                     ATH_RESTART_CALINTERVAL) {
 372                         sc->ani.caldone = ath9k_hw_reset_calvalid(ah);
 373                         if (sc->ani.caldone)
 374                                 sc->ani.resetcal_timer = timestamp;
 375                 }
 376         }
 377
 378         /* Verify whether we must check ANI */
 379         if ((timestamp - sc->ani.checkani_timer) >= ATH_ANI_POLLINTERVAL) {
 380                 aniflag = true;
 381                 sc->ani.checkani_timer = timestamp;
 382         }
 383
 384         /* Skip all processing if there's nothing to do. */
 385         if (longcal || shortcal || aniflag) {
 386                 /* Call ANI routine if necessary */
 387                 if (aniflag)
 388                         ath9k_hw_ani_monitor(ah, ah->curchan);
 389
 390                 /* Perform calibration if necessary */
 391                 if (longcal || shortcal) {
 392                         sc->ani.caldone = ath9k_hw_calibrate(ah, ah->curchan,
 393                                                      sc->rx_chainmask, longcal);
 394
 395                         if (longcal)
 396                                 sc->ani.noise_floor = ath9k_hw_getchan_noise(ah,
 397                                                                      ah->curchan);
 398
 399                         DPRINTF(sc->sc_ah, ATH_DBG_ANI," calibrate chan %u/%x nf: %d\n",
 400                                 ah->curchan->channel, ah->curchan->channelFlags,
 401                                 sc->ani.noise_floor);
 402                 }
 403         }
 404
 405         ath9k_ps_restore(sc);
 406
 407 set_timer:
 408         spin_unlock(&sc->ani_lock);
 409         /*
 410         * Set timer interval based on previous results.
 411         * The interval must be the shortest necessary to satisfy ANI,
 412         * short calibration and long calibration.
 413         */
 414         cal_interval = ATH_LONG_CALINTERVAL;
 415         if (sc->sc_ah->config.enable_ani)
 416                 cal_interval = min(cal_interval, (u32)ATH_ANI_POLLINTERVAL);
 417         if (!sc->ani.caldone)
 418                 cal_interval = min(cal_interval, (u32)short_cal_interval);
 419
 420         mod_timer(&sc->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
 421 }
 422
 423 static void ath_start_ani(struct ath_softc *sc)
 424 {
 425         unsigned long timestamp = jiffies_to_msecs(jiffies);
 426
 427         sc->ani.longcal_timer = timestamp;
 428         sc->ani.shortcal_timer = timestamp;
 429         sc->ani.checkani_timer = timestamp;
 430
 431         mod_timer(&sc->ani.timer,
 432                   jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
 433 }
 434
 435 /*
 436  * Update tx/rx chainmask. For legacy association,
 437  * hard code chainmask to 1x1, for 11n association, use
 438  * the chainmask configuration, for bt coexistence, use
 439  * the chainmask configuration even in legacy mode.
 440  */
 441 void ath_update_chainmask(struct ath_softc *sc, int is_ht)
 442 {
 443         struct ath_hw *ah = sc->sc_ah;
 444
 445         if ((sc->sc_flags & SC_OP_SCANNING) || is_ht ||
 446             (ah->btcoex_info.btcoex_scheme != ATH_BTCOEX_CFG_NONE)) {
 447                 sc->tx_chainmask = sc->sc_ah->caps.tx_chainmask;
 448                 sc->rx_chainmask = sc->sc_ah->caps.rx_chainmask;
 449         } else {
 450                 sc->tx_chainmask = 1;
 451                 sc->rx_chainmask = 1;
 452         }
 453
 454         DPRINTF(ah, ATH_DBG_CONFIG, "tx chmask: %d, rx chmask: %d\n",
 455                 sc->tx_chainmask, sc->rx_chainmask);
 456 }
 457
 458 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
 459 {
 460         struct ath_node *an;
 461
 462         an = (struct ath_node *)sta->drv_priv;
 463
 464         if (sc->sc_flags & SC_OP_TXAGGR) {
 465                 ath_tx_node_init(sc, an);
 466                 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
 467                                      sta->ht_cap.ampdu_factor);
 468                 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
 469                 an->last_rssi = ATH_RSSI_DUMMY_MARKER;
 470         }
 471 }
 472
 473 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 474 {
 475         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 476
 477         if (sc->sc_flags & SC_OP_TXAGGR)
 478                 ath_tx_node_cleanup(sc, an);
 479 }
 480
 481 static void ath9k_tasklet(unsigned long data)
 482 {
 483         struct ath_softc *sc = (struct ath_softc *)data;
 484         struct ath_hw *ah = sc->sc_ah;
 485
 486         u32 status = sc->intrstatus;
 487
 488         ath9k_ps_wakeup(sc);
 489
 490         if (status & ATH9K_INT_FATAL) {
 491                 ath_reset(sc, false);
 492                 ath9k_ps_restore(sc);
 493                 return;
 494         }
 495
 496         if (status & (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN)) {
 497                 spin_lock_bh(&sc->rx.rxflushlock);
 498                 ath_rx_tasklet(sc, 0);
 499                 spin_unlock_bh(&sc->rx.rxflushlock);
 500         }
 501
 502         if (status & ATH9K_INT_TX)
 503                 ath_tx_tasklet(sc);
 504
 505         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 506                 /*
 507                  * TSF sync does not look correct; remain awake to sync with
 508                  * the next Beacon.
 509                  */
 510                 DPRINTF(ah, ATH_DBG_PS, "TSFOOR - Sync with next Beacon\n");
 511                 sc->sc_flags |= SC_OP_WAIT_FOR_BEACON | SC_OP_BEACON_SYNC;
 512         }
 513
 514         if (ah->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_3WIRE)
 515                 if (status & ATH9K_INT_GENTIMER)
 516                         ath_gen_timer_isr(sc->sc_ah);
 517
 518         /* re-enable hardware interrupt */
 519         ath9k_hw_set_interrupts(ah, sc->imask);
 520         ath9k_ps_restore(sc);
 521 }
 522
 523 irqreturn_t ath_isr(int irq, void *dev)
 524 {
 525 #define SCHED_INTR (                            \
 526                 ATH9K_INT_FATAL |               \
 527                 ATH9K_INT_RXORN |               \
 528                 ATH9K_INT_RXEOL |               \
 529                 ATH9K_INT_RX |                  \
 530                 ATH9K_INT_TX |                  \
 531                 ATH9K_INT_BMISS |               \
 532                 ATH9K_INT_CST |                 \
 533                 ATH9K_INT_TSFOOR |              \
 534                 ATH9K_INT_GENTIMER)
 535
 536         struct ath_softc *sc = dev;
 537         struct ath_hw *ah = sc->sc_ah;
 538         enum ath9k_int status;
 539         bool sched = false;
 540
 541         /*
 542          * The hardware is not ready/present, don't
 543          * touch anything. Note this can happen early
 544          * on if the IRQ is shared.
 545          */
 546         if (sc->sc_flags & SC_OP_INVALID)
 547                 return IRQ_NONE;
 548
 549
 550         /* shared irq, not for us */
 551
 552         if (!ath9k_hw_intrpend(ah))
 553                 return IRQ_NONE;
 554
 555         /*
 556          * Figure out the reason(s) for the interrupt.  Note
 557          * that the hal returns a pseudo-ISR that may include
 558          * bits we haven't explicitly enabled so we mask the
 559          * value to insure we only process bits we requested.
 560          */
 561         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
 562         status &= sc->imask;    /* discard unasked-for bits */
 563
 564         /*
 565          * If there are no status bits set, then this interrupt was not
 566          * for me (should have been caught above).
 567          */
 568         if (!status)
 569                 return IRQ_NONE;
 570
 571         /* Cache the status */
 572         sc->intrstatus = status;
 573
 574         if (status & SCHED_INTR)
 575                 sched = true;
 576
 577         /*
 578          * If a FATAL or RXORN interrupt is received, we have to reset the
 579          * chip immediately.
 580          */
 581         if (status & (ATH9K_INT_FATAL | ATH9K_INT_RXORN))
 582                 goto chip_reset;
 583
 584         if (status & ATH9K_INT_SWBA)
 585                 tasklet_schedule(&sc->bcon_tasklet);
 586
 587         if (status & ATH9K_INT_TXURN)
 588                 ath9k_hw_updatetxtriglevel(ah, true);
 589
 590         if (status & ATH9K_INT_MIB) {
 591                 /*
 592                  * Disable interrupts until we service the MIB
 593                  * interrupt; otherwise it will continue to
 594                  * fire.
 595                  */
 596                 ath9k_hw_set_interrupts(ah, 0);
 597                 /*
 598                  * Let the hal handle the event. We assume
 599                  * it will clear whatever condition caused
 600                  * the interrupt.
 601                  */
 602                 ath9k_hw_procmibevent(ah);
 603                 ath9k_hw_set_interrupts(ah, sc->imask);
 604         }
 605
 606         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 607                 if (status & ATH9K_INT_TIM_TIMER) {
 608                         /* Clear RxAbort bit so that we can
 609                          * receive frames */
 610                         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
 611                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 612                         sc->sc_flags |= SC_OP_WAIT_FOR_BEACON;
 613                 }
 614
 615 chip_reset:
 616
 617         ath_debug_stat_interrupt(sc, status);
 618
 619         if (sched) {
 620                 /* turn off every interrupt except SWBA */
 621                 ath9k_hw_set_interrupts(ah, (sc->imask & ATH9K_INT_SWBA));
 622                 tasklet_schedule(&sc->intr_tq);
 623         }
 624
 625         return IRQ_HANDLED;
 626
 627 #undef SCHED_INTR
 628 }
 629
 630 static u32 ath_get_extchanmode(struct ath_softc *sc,
 631                                struct ieee80211_channel *chan,
 632                                enum nl80211_channel_type channel_type)
 633 {
 634         u32 chanmode = 0;
 635
 636         switch (chan->band) {
 637         case IEEE80211_BAND_2GHZ:
 638                 switch(channel_type) {
 639                 case NL80211_CHAN_NO_HT:
 640                 case NL80211_CHAN_HT20:
 641                         chanmode = CHANNEL_G_HT20;
 642                         break;
 643                 case NL80211_CHAN_HT40PLUS:
 644                         chanmode = CHANNEL_G_HT40PLUS;
 645                         break;
 646                 case NL80211_CHAN_HT40MINUS:
 647                         chanmode = CHANNEL_G_HT40MINUS;
 648                         break;
 649                 }
 650                 break;
 651         case IEEE80211_BAND_5GHZ:
 652                 switch(channel_type) {
 653                 case NL80211_CHAN_NO_HT:
 654                 case NL80211_CHAN_HT20:
 655                         chanmode = CHANNEL_A_HT20;
 656                         break;
 657                 case NL80211_CHAN_HT40PLUS:
 658                         chanmode = CHANNEL_A_HT40PLUS;
 659                         break;
 660                 case NL80211_CHAN_HT40MINUS:
 661                         chanmode = CHANNEL_A_HT40MINUS;
 662                         break;
 663                 }
 664                 break;
 665         default:
 666                 break;
 667         }
 668
 669         return chanmode;
 670 }
 671
 672 static int ath_setkey_tkip(struct ath_softc *sc, u16 keyix, const u8 *key,
 673                            struct ath9k_keyval *hk, const u8 *addr,
 674                            bool authenticator)
 675 {
 676         const u8 *key_rxmic;
 677         const u8 *key_txmic;
 678
 679         key_txmic = key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY;
 680         key_rxmic = key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY;
 681
 682         if (addr == NULL) {
 683                 /*
 684                  * Group key installation - only two key cache entries are used
 685                  * regardless of splitmic capability since group key is only
 686                  * used either for TX or RX.
 687                  */
 688                 if (authenticator) {
 689                         memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
 690                         memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_mic));
 691                 } else {
 692                         memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
 693                         memcpy(hk->kv_txmic, key_rxmic, sizeof(hk->kv_mic));
 694                 }
 695                 return ath9k_hw_set_keycache_entry(sc->sc_ah, keyix, hk, addr);
 696         }
 697         if (!sc->splitmic) {
 698                 /* TX and RX keys share the same key cache entry. */
 699                 memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
 700                 memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic));
 701                 return ath9k_hw_set_keycache_entry(sc->sc_ah, keyix, hk, addr);
 702         }
 703
 704         /* Separate key cache entries for TX and RX */
 705
 706         /* TX key goes at first index, RX key at +32. */
 707         memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
 708         if (!ath9k_hw_set_keycache_entry(sc->sc_ah, keyix, hk, NULL)) {
 709                 /* TX MIC entry failed. No need to proceed further */
 710                 DPRINTF(sc->sc_ah, ATH_DBG_FATAL,
 711                         "Setting TX MIC Key Failed\n");
 712                 return 0;
 713         }
 714
 715         memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
 716         /* XXX delete tx key on failure? */
 717         return ath9k_hw_set_keycache_entry(sc->sc_ah, keyix + 32, hk, addr);
 718 }
 719
 720 static int ath_reserve_key_cache_slot_tkip(struct ath_softc *sc)
 721 {
 722         int i;
 723
 724         for (i = IEEE80211_WEP_NKID; i < sc->keymax / 2; i++) {
 725                 if (test_bit(i, sc->keymap) ||
 726                     test_bit(i + 64, sc->keymap))
 727                         continue; /* At least one part of TKIP key allocated */
 728                 if (sc->splitmic &&
 729                     (test_bit(i + 32, sc->keymap) ||
 730                      test_bit(i + 64 + 32, sc->keymap)))
 731                         continue; /* At least one part of TKIP key allocated */
 732
 733                 /* Found a free slot for a TKIP key */
 734                 return i;
 735         }
 736         return -1;
 737 }
 738
 739 static int ath_reserve_key_cache_slot(struct ath_softc *sc)
 740 {
 741         int i;
 742
 743         /* First, try to find slots that would not be available for TKIP. */
 744         if (sc->splitmic) {
 745                 for (i = IEEE80211_WEP_NKID; i < sc->keymax / 4; i++) {
 746                         if (!test_bit(i, sc->keymap) &&
 747                             (test_bit(i + 32, sc->keymap) ||
 748                              test_bit(i + 64, sc->keymap) ||
 749                              test_bit(i + 64 + 32, sc->keymap)))
 750                                 return i;
 751                         if (!test_bit(i + 32, sc->keymap) &&
 752                             (test_bit(i, sc->keymap) ||
 753                              test_bit(i + 64, sc->keymap) ||
 754                              test_bit(i + 64 + 32, sc->keymap)))
 755                                 return i + 32;
 756                         if (!test_bit(i + 64, sc->keymap) &&
 757                             (test_bit(i , sc->keymap) ||
 758                              test_bit(i + 32, sc->keymap) ||
 759                              test_bit(i + 64 + 32, sc->keymap)))
 760                                 return i + 64;
 761                         if (!test_bit(i + 64 + 32, sc->keymap) &&
 762                             (test_bit(i, sc->keymap) ||
 763                              test_bit(i + 32, sc->keymap) ||
 764                              test_bit(i + 64, sc->keymap)))
 765                                 return i + 64 + 32;
 766                 }
 767         } else {
 768                 for (i = IEEE80211_WEP_NKID; i < sc->keymax / 2; i++) {
 769                         if (!test_bit(i, sc->keymap) &&
 770                             test_bit(i + 64, sc->keymap))
 771                                 return i;
 772                         if (test_bit(i, sc->keymap) &&
 773                             !test_bit(i + 64, sc->keymap))
 774                                 return i + 64;
 775                 }
 776         }
 777
 778         /* No partially used TKIP slots, pick any available slot */
 779         for (i = IEEE80211_WEP_NKID; i < sc->keymax; i++) {
 780                 /* Do not allow slots that could be needed for TKIP group keys
 781                  * to be used. This limitation could be removed if we know that
 782                  * TKIP will not be used. */
 783                 if (i >= 64 && i < 64 + IEEE80211_WEP_NKID)
 784                         continue;
 785                 if (sc->splitmic) {
 786                         if (i >= 32 && i < 32 + IEEE80211_WEP_NKID)
 787                                 continue;
 788                         if (i >= 64 + 32 && i < 64 + 32 + IEEE80211_WEP_NKID)
 789                                 continue;
 790                 }
 791
 792                 if (!test_bit(i, sc->keymap))
 793                         return i; /* Found a free slot for a key */
 794         }
 795
 796         /* No free slot found */
 797         return -1;
 798 }
 799
 800 static int ath_key_config(struct ath_softc *sc,
 801                           struct ieee80211_vif *vif,
 802                           struct ieee80211_sta *sta,
 803                           struct ieee80211_key_conf *key)
 804 {
 805         struct ath9k_keyval hk;
 806         const u8 *mac = NULL;
 807         int ret = 0;
 808         int idx;
 809
 810         memset(&hk, 0, sizeof(hk));
 811
 812         switch (key->alg) {
 813         case ALG_WEP:
 814                 hk.kv_type = ATH9K_CIPHER_WEP;
 815                 break;
 816         case ALG_TKIP:
 817                 hk.kv_type = ATH9K_CIPHER_TKIP;
 818                 break;
 819         case ALG_CCMP:
 820                 hk.kv_type = ATH9K_CIPHER_AES_CCM;
 821                 break;
 822         default:
 823                 return -EOPNOTSUPP;
 824         }
 825
 826         hk.kv_len = key->keylen;
 827         memcpy(hk.kv_val, key->key, key->keylen);
 828
 829         if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 830                 /* For now, use the default keys for broadcast keys. This may
 831                  * need to change with virtual interfaces. */
 832                 idx = key->keyidx;
 833         } else if (key->keyidx) {
 834                 if (WARN_ON(!sta))
 835                         return -EOPNOTSUPP;
 836                 mac = sta->addr;
 837
 838                 if (vif->type != NL80211_IFTYPE_AP) {
 839                         /* Only keyidx 0 should be used with unicast key, but
 840                          * allow this for client mode for now. */
 841                         idx = key->keyidx;
 842                 } else
 843                         return -EIO;
 844         } else {
 845                 if (WARN_ON(!sta))
 846                         return -EOPNOTSUPP;
 847                 mac = sta->addr;
 848
 849                 if (key->alg == ALG_TKIP)
 850                         idx = ath_reserve_key_cache_slot_tkip(sc);
 851                 else
 852                         idx = ath_reserve_key_cache_slot(sc);
 853                 if (idx < 0)
 854                         return -ENOSPC; /* no free key cache entries */
 855         }
 856
 857         if (key->alg == ALG_TKIP)
 858                 ret = ath_setkey_tkip(sc, idx, key->key, &hk, mac,
 859                                       vif->type == NL80211_IFTYPE_AP);
 860         else
 861                 ret = ath9k_hw_set_keycache_entry(sc->sc_ah, idx, &hk, mac);
 862
 863         if (!ret)
 864                 return -EIO;
 865
 866         set_bit(idx, sc->keymap);
 867         if (key->alg == ALG_TKIP) {
 868                 set_bit(idx + 64, sc->keymap);
 869                 if (sc->splitmic) {
 870                         set_bit(idx + 32, sc->keymap);
 871                         set_bit(idx + 64 + 32, sc->keymap);
 872                 }
 873         }
 874
 875         return idx;
 876 }
 877
 878 static void ath_key_delete(struct ath_softc *sc, struct ieee80211_key_conf *key)
 879 {
 880         ath9k_hw_keyreset(sc->sc_ah, key->hw_key_idx);
 881         if (key->hw_key_idx < IEEE80211_WEP_NKID)
 882                 return;
 883
 884         clear_bit(key->hw_key_idx, sc->keymap);
 885         if (key->alg != ALG_TKIP)
 886                 return;
 887
 888         clear_bit(key->hw_key_idx + 64, sc->keymap);
 889         if (sc->splitmic) {
 890                 clear_bit(key->hw_key_idx + 32, sc->keymap);
 891                 clear_bit(key->hw_key_idx + 64 + 32, sc->keymap);
 892         }
 893 }
 894
 895 static void setup_ht_cap(struct ath_softc *sc,
 896                          struct ieee80211_sta_ht_cap *ht_info)
 897 {
 898         u8 tx_streams, rx_streams;
 899
 900         ht_info->ht_supported = true;
 901         ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 902                        IEEE80211_HT_CAP_SM_PS |
 903                        IEEE80211_HT_CAP_SGI_40 |
 904                        IEEE80211_HT_CAP_DSSSCCK40;
 905
 906         ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
 907         ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_8;
 908
 909         /* set up supported mcs set */
 910         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 911         tx_streams = !(sc->tx_chainmask & (sc->tx_chainmask - 1)) ? 1 : 2;
 912         rx_streams = !(sc->rx_chainmask & (sc->rx_chainmask - 1)) ? 1 : 2;
 913
 914         if (tx_streams != rx_streams) {
 915                 DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "TX streams %d, RX streams: %d\n",
 916                         tx_streams, rx_streams);
 917                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 918                 ht_info->mcs.tx_params |= ((tx_streams - 1) <<
 919                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 920         }
 921
 922         ht_info->mcs.rx_mask[0] = 0xff;
 923         if (rx_streams >= 2)
 924                 ht_info->mcs.rx_mask[1] = 0xff;
 925
 926         ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_DEFINED;
 927 }
 928
 929 static void ath9k_bss_assoc_info(struct ath_softc *sc,
 930                                  struct ieee80211_vif *vif,
 931                                  struct ieee80211_bss_conf *bss_conf)
 932 {
 933
 934         if (bss_conf->assoc) {
 935                 DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "Bss Info ASSOC %d, bssid: %pM\n",
 936                         bss_conf->aid, sc->curbssid);
 937
 938                 /* New association, store aid */
 939                 sc->curaid = bss_conf->aid;
 940                 ath9k_hw_write_associd(sc);
 941
 942                 /*
 943                  * Request a re-configuration of Beacon related timers
 944                  * on the receipt of the first Beacon frame (i.e.,
 945                  * after time sync with the AP).
 946                  */
 947                 sc->sc_flags |= SC_OP_BEACON_SYNC;
 948
 949                 /* Configure the beacon */
 950                 ath_beacon_config(sc, vif);
 951
 952                 /* Reset rssi stats */
 953                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
 954
 955                 ath_start_ani(sc);
 956         } else {
 957                 DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "Bss Info DISASSOC\n");
 958                 sc->curaid = 0;
 959                 /* Stop ANI */
 960                 del_timer_sync(&sc->ani.timer);
 961         }
 962 }
 963
 964 /********************************/
 965 /*       LED functions          */
 966 /********************************/
 967
 968 static void ath_led_blink_work(struct work_struct *work)
 969 {
 970         struct ath_softc *sc = container_of(work, struct ath_softc,
 971                                             ath_led_blink_work.work);
 972
 973         if (!(sc->sc_flags & SC_OP_LED_ASSOCIATED))
 974                 return;
 975
 976         if ((sc->led_on_duration == ATH_LED_ON_DURATION_IDLE) ||
 977             (sc->led_off_duration == ATH_LED_OFF_DURATION_IDLE))
 978                 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 0);
 979         else
 980                 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin,
 981                                   (sc->sc_flags & SC_OP_LED_ON) ? 1 : 0);
 982
 983         ieee80211_queue_delayed_work(sc->hw,
 984                                      &sc->ath_led_blink_work,
 985                                      (sc->sc_flags & SC_OP_LED_ON) ?
 986                                         msecs_to_jiffies(sc->led_off_duration) :
 987                                         msecs_to_jiffies(sc->led_on_duration));
 988
 989         sc->led_on_duration = sc->led_on_cnt ?
 990                         max((ATH_LED_ON_DURATION_IDLE - sc->led_on_cnt), 25) :
 991                         ATH_LED_ON_DURATION_IDLE;
 992         sc->led_off_duration = sc->led_off_cnt ?
 993                         max((ATH_LED_OFF_DURATION_IDLE - sc->led_off_cnt), 10) :
 994                         ATH_LED_OFF_DURATION_IDLE;
 995         sc->led_on_cnt = sc->led_off_cnt = 0;
 996         if (sc->sc_flags & SC_OP_LED_ON)
 997                 sc->sc_flags &= ~SC_OP_LED_ON;
 998         else
 999                 sc->sc_flags |= SC_OP_LED_ON;
1000 }
1001
1002 static void ath_led_brightness(struct led_classdev *led_cdev,
1003                                enum led_brightness brightness)
1004 {
1005         struct ath_led *led = container_of(led_cdev, struct ath_led, led_cdev);
1006         struct ath_softc *sc = led->sc;
1007
1008         switch (brightness) {
1009         case LED_OFF:
1010                 if (led->led_type == ATH_LED_ASSOC ||
1011                     led->led_type == ATH_LED_RADIO) {
1012                         ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin,
1013                                 (led->led_type == ATH_LED_RADIO));
1014                         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
1015                         if (led->led_type == ATH_LED_RADIO)
1016                                 sc->sc_flags &= ~SC_OP_LED_ON;
1017                 } else {
1018                         sc->led_off_cnt++;
1019                 }
1020                 break;
1021         case LED_FULL:
1022                 if (led->led_type == ATH_LED_ASSOC) {
1023                         sc->sc_flags |= SC_OP_LED_ASSOCIATED;
1024                         ieee80211_queue_delayed_work(sc->hw,
1025                                                      &sc->ath_led_blink_work, 0);
1026                 } else if (led->led_type == ATH_LED_RADIO) {
1027                         ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 0);
1028                         sc->sc_flags |= SC_OP_LED_ON;
1029                 } else {
1030                         sc->led_on_cnt++;
1031                 }
1032                 break;
1033         default:
1034                 break;
1035         }
1036 }
1037
1038 static int ath_register_led(struct ath_softc *sc, struct ath_led *led,
1039                             char *trigger)
1040 {
1041         int ret;
1042
1043         led->sc = sc;
1044         led->led_cdev.name = led->name;
1045         led->led_cdev.default_trigger = trigger;
1046         led->led_cdev.brightness_set = ath_led_brightness;
1047
1048         ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->led_cdev);
1049         if (ret)
1050                 DPRINTF(sc->sc_ah, ATH_DBG_FATAL,
1051                         "Failed to register led:%s", led->name);
1052         else
1053                 led->registered = 1;
1054         return ret;
1055 }
1056
1057 static void ath_unregister_led(struct ath_led *led)
1058 {
1059         if (led->registered) {
1060                 led_classdev_unregister(&led->led_cdev);
1061                 led->registered = 0;
1062         }
1063 }
1064
1065 static void ath_deinit_leds(struct ath_softc *sc)
1066 {
1067         ath_unregister_led(&sc->assoc_led);
1068         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
1069         ath_unregister_led(&sc->tx_led);
1070         ath_unregister_led(&sc->rx_led);
1071         ath_unregister_led(&sc->radio_led);
1072         ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
1073 }
1074
1075 static void ath_init_leds(struct ath_softc *sc)
1076 {
1077         char *trigger;
1078         int ret;
1079
1080         if (AR_SREV_9287(sc->sc_ah))
1081                 sc->sc_ah->led_pin = ATH_LED_PIN_9287;
1082         else
1083                 sc->sc_ah->led_pin = ATH_LED_PIN_DEF;
1084
1085         /* Configure gpio 1 for output */
1086         ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin,
1087                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1088         /* LED off, active low */
1089         ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
1090
1091         INIT_DELAYED_WORK(&sc->ath_led_blink_work, ath_led_blink_work);
1092
1093         trigger = ieee80211_get_radio_led_name(sc->hw);
1094         snprintf(sc->radio_led.name, sizeof(sc->radio_led.name),
1095                 "ath9k-%s::radio", wiphy_name(sc->hw->wiphy));
1096         ret = ath_register_led(sc, &sc->radio_led, trigger);
1097         sc->radio_led.led_type = ATH_LED_RADIO;
1098         if (ret)
1099                 goto fail;
1100
1101         trigger = ieee80211_get_assoc_led_name(sc->hw);
1102         snprintf(sc->assoc_led.name, sizeof(sc->assoc_led.name),
1103                 "ath9k-%s::assoc", wiphy_name(sc->hw->wiphy));
1104         ret = ath_register_led(sc, &sc->assoc_led, trigger);
1105         sc->assoc_led.led_type = ATH_LED_ASSOC;
1106         if (ret)
1107                 goto fail;
1108
1109         trigger = ieee80211_get_tx_led_name(sc->hw);
1110         snprintf(sc->tx_led.name, sizeof(sc->tx_led.name),
1111                 "ath9k-%s::tx", wiphy_name(sc->hw->wiphy));
1112         ret = ath_register_led(sc, &sc->tx_led, trigger);
1113         sc->tx_led.led_type = ATH_LED_TX;
1114         if (ret)
1115                 goto fail;
1116
1117         trigger = ieee80211_get_rx_led_name(sc->hw);
1118         snprintf(sc->rx_led.name, sizeof(sc->rx_led.name),
1119                 "ath9k-%s::rx", wiphy_name(sc->hw->wiphy));
1120         ret = ath_register_led(sc, &sc->rx_led, trigger);
1121         sc->rx_led.led_type = ATH_LED_RX;
1122         if (ret)
1123                 goto fail;
1124
1125         return;
1126
1127 fail:
1128         cancel_delayed_work_sync(&sc->ath_led_blink_work);
1129         ath_deinit_leds(sc);
1130 }
1131
1132 void ath_radio_enable(struct ath_softc *sc)
1133 {
1134         struct ath_hw *ah = sc->sc_ah;
1135         struct ieee80211_channel *channel = sc->hw->conf.channel;
1136         int r;
1137
1138         ath9k_ps_wakeup(sc);
1139         ath9k_hw_configpcipowersave(ah, 0, 0);
1140
1141         if (!ah->curchan)
1142                 ah->curchan = ath_get_curchannel(sc, sc->hw);
1143
1144         spin_lock_bh(&sc->sc_resetlock);
1145         r = ath9k_hw_reset(ah, ah->curchan, false);
1146         if (r) {
1147                 DPRINTF(sc->sc_ah, ATH_DBG_FATAL,
1148                         "Unable to reset channel %u (%uMhz) ",
1149                         "reset status %d\n",
1150                         channel->center_freq, r);
1151         }
1152         spin_unlock_bh(&sc->sc_resetlock);
1153
1154         ath_update_txpow(sc);
1155         if (ath_startrecv(sc) != 0) {
1156                 DPRINTF(sc->sc_ah, ATH_DBG_FATAL,
1157                         "Unable to restart recv logic\n");
1158                 return;
1159         }
1160
1161         if (sc->sc_flags & SC_OP_BEACONS)
1162                 ath_beacon_config(sc, NULL);    /* restart beacons */
1163
1164         /* Re-Enable  interrupts */
1165         ath9k_hw_set_interrupts(ah, sc->imask);
1166
1167         /* Enable LED */
1168         ath9k_hw_cfg_output(ah, ah->led_pin,
1169                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1170         ath9k_hw_set_gpio(ah, ah->led_pin, 0);
1171
1172         ieee80211_wake_queues(sc->hw);
1173         ath9k_ps_restore(sc);
1174 }
1175
1176 void ath_radio_disable(struct ath_softc *sc)
1177 {
1178         struct ath_hw *ah = sc->sc_ah;
1179         struct ieee80211_channel *channel = sc->hw->conf.channel;
1180         int r;
1181
1182         ath9k_ps_wakeup(sc);
1183         ieee80211_stop_queues(sc->hw);
1184
1185         /* Disable LED */
1186         ath9k_hw_set_gpio(ah, ah->led_pin, 1);
1187         ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
1188
1189         /* Disable interrupts */
1190         ath9k_hw_set_interrupts(ah, 0);
1191
1192         ath_drain_all_txq(sc, false);   /* clear pending tx frames */
1193         ath_stoprecv(sc);               /* turn off frame recv */
1194         ath_flushrecv(sc);              /* flush recv queue */
1195
1196         if (!ah->curchan)
1197                 ah->curchan = ath_get_curchannel(sc, sc->hw);
1198
1199         spin_lock_bh(&sc->sc_resetlock);
1200         r = ath9k_hw_reset(ah, ah->curchan, false);
1201         if (r) {
1202                 DPRINTF(sc->sc_ah, ATH_DBG_FATAL,
1203                         "Unable to reset channel %u (%uMhz) "
1204                         "reset status %d\n",
1205                         channel->center_freq, r);
1206         }
1207         spin_unlock_bh(&sc->sc_resetlock);
1208
1209         ath9k_hw_phy_disable(ah);
1210         ath9k_hw_configpcipowersave(ah, 1, 1);
1211         ath9k_ps_restore(sc);
1212         ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP);
1213 }
1214
1215 /*******************/
1216 /*      Rfkill     */
1217 /*******************/
1218
1219 static bool ath_is_rfkill_set(struct ath_softc *sc)
1220 {
1221         struct ath_hw *ah = sc->sc_ah;
1222
1223         return ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
1224                                   ah->rfkill_polarity;
1225 }
1226
1227 static void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
1228 {
1229         struct ath_wiphy *aphy = hw->priv;
1230         struct ath_softc *sc = aphy->sc;
1231         bool blocked = !!ath_is_rfkill_set(sc);
1232
1233         wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
1234 }
1235
1236 static void ath_start_rfkill_poll(struct ath_softc *sc)
1237 {
1238         struct ath_hw *ah = sc->sc_ah;
1239
1240         if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1241                 wiphy_rfkill_start_polling(sc->hw->wiphy);
1242 }
1243
1244 void ath_cleanup(struct ath_softc *sc)
1245 {
1246         ath_detach(sc);
1247         free_irq(sc->irq, sc);
1248         ath_bus_cleanup(sc);
1249         kfree(sc->sec_wiphy);
1250         ieee80211_free_hw(sc->hw);
1251 }
1252
1253 void ath_detach(struct ath_softc *sc)
1254 {
1255         struct ieee80211_hw *hw = sc->hw;
1256         struct ath_hw *ah = sc->sc_ah;
1257         int i = 0;
1258
1259         ath9k_ps_wakeup(sc);
1260
1261         dev_dbg(sc->dev, "Detach ATH hw\n");
1262
1263         ath_deinit_leds(sc);
1264         wiphy_rfkill_stop_polling(sc->hw->wiphy);
1265
1266         for (i = 0; i < sc->num_sec_wiphy; i++) {
1267                 struct ath_wiphy *aphy = sc->sec_wiphy[i];
1268                 if (aphy == NULL)
1269                         continue;
1270                 sc->sec_wiphy[i] = NULL;
1271                 ieee80211_unregister_hw(aphy->hw);
1272                 ieee80211_free_hw(aphy->hw);
1273         }
1274         ieee80211_unregister_hw(hw);
1275         ath_rx_cleanup(sc);
1276         ath_tx_cleanup(sc);
1277
1278         tasklet_kill(&sc->intr_tq);
1279         tasklet_kill(&sc->bcon_tasklet);
1280
1281         if (!(sc->sc_flags & SC_OP_INVALID))
1282                 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1283
1284         /* cleanup tx queues */
1285         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
1286                 if (ATH_TXQ_SETUP(sc, i))
1287                         ath_tx_cleanupq(sc, &sc->tx.txq[i]);
1288
1289         if ((sc->btcoex.no_stomp_timer) &&
1290             ah->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_3WIRE)
1291                 ath_gen_timer_free(ah, sc->btcoex.no_stomp_timer);
1292
1293         ath9k_hw_detach(ah);
1294         ath9k_exit_debug(ah);
1295         sc->sc_ah = NULL;
1296 }
1297
1298 static int ath9k_reg_notifier(struct wiphy *wiphy,
1299                               struct regulatory_request *request)
1300 {
1301         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1302         struct ath_wiphy *aphy = hw->priv;
1303         struct ath_softc *sc = aphy->sc;
1304         struct ath_regulatory *reg = &sc->common.regulatory;
1305
1306         return ath_reg_notifier_apply(wiphy, request, reg);
1307 }
1308
1309 /*
1310  * Detects if there is any priority bt traffic
1311  */
1312 static void ath_detect_bt_priority(struct ath_softc *sc)
1313 {
1314         struct ath_btcoex *btcoex = &sc->btcoex;
1315         struct ath_hw *ah = sc->sc_ah;
1316
1317         if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_info.btpriority_gpio))
1318                 btcoex->bt_priority_cnt++;
1319
1320         if (time_after(jiffies, btcoex->bt_priority_time +
1321                         msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
1322                 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
1323                         DPRINTF(sc->sc_ah, ATH_DBG_BTCOEX,
1324                                 "BT priority traffic detected");
1325                         sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED;
1326                 } else {
1327                         sc->sc_flags &= ~SC_OP_BT_PRIORITY_DETECTED;
1328                 }
1329
1330                 btcoex->bt_priority_cnt = 0;
1331                 btcoex->bt_priority_time = jiffies;
1332         }
1333 }
1334
1335 static void ath_btcoex_set_weight(struct ath_btcoex_info *btcoex_info,
1336                                   u32 bt_weight,
1337                                   u32 wlan_weight)
1338 {
1339         btcoex_info->bt_coex_weights = SM(bt_weight, AR_BTCOEX_BT_WGHT) |
1340                                        SM(wlan_weight, AR_BTCOEX_WL_WGHT);
1341 }
1342
1343 static void ath9k_hw_btcoex_init_weight(struct ath_hw *ah)
1344 {
1345         ath_btcoex_set_weight(&ah->btcoex_info, AR_BT_COEX_WGHT,
1346                               AR_STOMP_LOW_WLAN_WGHT);
1347 }
1348
1349 /*
1350  * Configures appropriate weight based on stomp type.
1351  */
1352 static void ath_btcoex_bt_stomp(struct ath_softc *sc,
1353                                 struct ath_btcoex_info *btinfo,
1354                                 int stomp_type)
1355 {
1356
1357         switch (stomp_type) {
1358         case ATH_BTCOEX_STOMP_ALL:
1359                 ath_btcoex_set_weight(btinfo, AR_BT_COEX_WGHT,
1360                                       AR_STOMP_ALL_WLAN_WGHT);
1361                 break;
1362         case ATH_BTCOEX_STOMP_LOW:
1363                 ath_btcoex_set_weight(btinfo, AR_BT_COEX_WGHT,
1364                                       AR_STOMP_LOW_WLAN_WGHT);
1365                 break;
1366         case ATH_BTCOEX_STOMP_NONE:
1367                 ath_btcoex_set_weight(btinfo, AR_BT_COEX_WGHT,
1368                                       AR_STOMP_NONE_WLAN_WGHT);
1369                 break;
1370         default:
1371                 DPRINTF(sc->sc_ah, ATH_DBG_BTCOEX, "Invalid Stomptype\n");
1372                 break;
1373         }
1374
1375         ath9k_hw_btcoex_enable(sc->sc_ah);
1376 }
1377
1378 /*
1379  * This is the master bt coex timer which runs for every
1380  * 45ms, bt traffic will be given priority during 55% of this
1381  * period while wlan gets remaining 45%
1382  */
1383 static void ath_btcoex_period_timer(unsigned long data)
1384 {
1385         struct ath_softc *sc = (struct ath_softc *) data;
1386         struct ath_hw *ah = sc->sc_ah;
1387         struct ath_btcoex *btcoex = &sc->btcoex;
1388         struct ath_btcoex_info *btinfo = &ah->btcoex_info;
1389
1390         ath_detect_bt_priority(sc);
1391
1392         spin_lock_bh(&btcoex->btcoex_lock);
1393
1394         ath_btcoex_bt_stomp(sc, btinfo, btcoex->bt_stomp_type);
1395
1396         spin_unlock_bh(&btcoex->btcoex_lock);
1397
1398         if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) {
1399                 if (btcoex->hw_timer_enabled)
1400                         ath_gen_timer_stop(ah, btcoex->no_stomp_timer);
1401
1402                 ath_gen_timer_start(ah,
1403                         btcoex->no_stomp_timer,
1404                         (ath9k_hw_gettsf32(ah) +
1405                                 btcoex->btcoex_no_stomp),
1406                                 btcoex->btcoex_no_stomp * 10);
1407                 btcoex->hw_timer_enabled = true;
1408         }
1409
1410         mod_timer(&btcoex->period_timer, jiffies +
1411                                   msecs_to_jiffies(ATH_BTCOEX_DEF_BT_PERIOD));
1412 }
1413
1414 /*
1415  * Generic tsf based hw timer which configures weight
1416  * registers to time slice between wlan and bt traffic
1417  */
1418 static void ath_btcoex_no_stomp_timer(void *arg)
1419 {
1420         struct ath_softc *sc = (struct ath_softc *)arg;
1421         struct ath_hw *ah = sc->sc_ah;
1422         struct ath_btcoex *btcoex = &sc->btcoex;
1423         struct ath_btcoex_info *btinfo = &ah->btcoex_info;
1424
1425         DPRINTF(ah, ATH_DBG_BTCOEX, "no stomp timer running \n");
1426
1427         spin_lock_bh(&btcoex->btcoex_lock);
1428
1429         if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW)
1430                 ath_btcoex_bt_stomp(sc, btinfo, ATH_BTCOEX_STOMP_NONE);
1431          else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
1432                 ath_btcoex_bt_stomp(sc, btinfo, ATH_BTCOEX_STOMP_LOW);
1433
1434         spin_unlock_bh(&btcoex->btcoex_lock);
1435 }
1436
1437 static int ath_init_btcoex_timer(struct ath_softc *sc)
1438 {
1439         struct ath_btcoex *btcoex = &sc->btcoex;
1440
1441         btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000;
1442         btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
1443                 btcoex->btcoex_period / 100;
1444
1445         setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
1446                         (unsigned long) sc);
1447
1448         spin_lock_init(&btcoex->btcoex_lock);
1449
1450         btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah,
1451                         ath_btcoex_no_stomp_timer,
1452                         ath_btcoex_no_stomp_timer,
1453                         (void *) sc, AR_FIRST_NDP_TIMER);
1454
1455         if (!btcoex->no_stomp_timer)
1456                 return -ENOMEM;
1457
1458         return 0;
1459 }
1460
1461 /*
1462  * Initialize and fill ath_softc, ath_sofct is the
1463  * "Software Carrier" struct. Historically it has existed
1464  * to allow the separation between hardware specific
1465  * variables (now in ath_hw) and driver specific variables.
1466  */
1467 static int ath_init_softc(u16 devid, struct ath_softc *sc, u16 subsysid)
1468 {
1469         struct ath_hw *ah = NULL;
1470         int r = 0, i;
1471         int csz = 0;
1472         int qnum;
1473
1474         /* XXX: hardware will not be ready until ath_open() being called */
1475         sc->sc_flags |= SC_OP_INVALID;
1476
1477         spin_lock_init(&sc->wiphy_lock);
1478         spin_lock_init(&sc->sc_resetlock);
1479         spin_lock_init(&sc->sc_serial_rw);
1480         spin_lock_init(&sc->ani_lock);
1481         spin_lock_init(&sc->sc_pm_lock);
1482         mutex_init(&sc->mutex);
1483         tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);
1484         tasklet_init(&sc->bcon_tasklet, ath_beacon_tasklet,
1485                      (unsigned long)sc);
1486
1487         /*
1488          * Cache line size is used to size and align various
1489          * structures used to communicate with the hardware.
1490          */
1491         ath_read_cachesize(sc, &csz);
1492         /* XXX assert csz is non-zero */
1493         sc->common.cachelsz = csz << 2; /* convert to bytes */
1494
1495         ah = kzalloc(sizeof(struct ath_hw), GFP_KERNEL);
1496         if (!ah) {
1497                 r = -ENOMEM;
1498                 goto bad_no_ah;
1499         }
1500
1501         ah->ah_sc = sc;
1502         ah->hw_version.devid = devid;
1503         ah->hw_version.subsysid = subsysid;
1504         sc->sc_ah = ah;
1505
1506         if (ath9k_init_debug(ah) < 0)
1507                 dev_err(sc->dev, "Unable to create debugfs files\n");
1508
1509         r = ath9k_hw_init(ah);
1510         if (r) {
1511                 DPRINTF(ah, ATH_DBG_FATAL,
1512                         "Unable to initialize hardware; "
1513                         "initialization status: %d\n", r);
1514                 goto bad;
1515         }
1516
1517         /* Get the hardware key cache size. */
1518         sc->keymax = ah->caps.keycache_size;
1519         if (sc->keymax > ATH_KEYMAX) {
1520                 DPRINTF(ah, ATH_DBG_ANY,
1521                         "Warning, using only %u entries in %u key cache\n",
1522                         ATH_KEYMAX, sc->keymax);
1523                 sc->keymax = ATH_KEYMAX;
1524         }
1525
1526         /*
1527          * Reset the key cache since some parts do not
1528          * reset the contents on initial power up.
1529          */
1530         for (i = 0; i < sc->keymax; i++)
1531                 ath9k_hw_keyreset(ah, (u16) i);
1532
1533         /* default to MONITOR mode */
1534         sc->sc_ah->opmode = NL80211_IFTYPE_MONITOR;
1535
1536         /* Setup rate tables */
1537
1538         ath_rate_attach(sc);
1539         ath_setup_rates(sc, IEEE80211_BAND_2GHZ);
1540         ath_setup_rates(sc, IEEE80211_BAND_5GHZ);
1541
1542         /*
1543          * Allocate hardware transmit queues: one queue for
1544          * beacon frames and one data queue for each QoS
1545          * priority.  Note that the hal handles reseting
1546          * these queues at the needed time.
1547          */
1548         sc->beacon.beaconq = ath_beaconq_setup(ah);
1549         if (sc->beacon.beaconq == -1) {
1550                 DPRINTF(ah, ATH_DBG_FATAL,
1551                         "Unable to setup a beacon xmit queue\n");
1552                 r = -EIO;
1553                 goto bad2;
1554         }
1555         sc->beacon.cabq = ath_txq_setup(sc, ATH9K_TX_QUEUE_CAB, 0);
1556         if (sc->beacon.cabq == NULL) {
1557                 DPRINTF(ah, ATH_DBG_FATAL,
1558                         "Unable to setup CAB xmit queue\n");
1559                 r = -EIO;
1560                 goto bad2;
1561         }
1562
1563         sc->config.cabqReadytime = ATH_CABQ_READY_TIME;
1564         ath_cabq_update(sc);
1565
1566         for (i = 0; i < ARRAY_SIZE(sc->tx.hwq_map); i++)
1567                 sc->tx.hwq_map[i] = -1;
1568
1569         /* Setup data queues */
1570         /* NB: ensure BK queue is the lowest priority h/w queue */
1571         if (!ath_tx_setup(sc, ATH9K_WME_AC_BK)) {
1572                 DPRINTF(ah, ATH_DBG_FATAL,
1573                         "Unable to setup xmit queue for BK traffic\n");
1574                 r = -EIO;
1575                 goto bad2;
1576         }
1577
1578         if (!ath_tx_setup(sc, ATH9K_WME_AC_BE)) {
1579                 DPRINTF(ah, ATH_DBG_FATAL,
1580                         "Unable to setup xmit queue for BE traffic\n");
1581                 r = -EIO;
1582                 goto bad2;
1583         }
1584         if (!ath_tx_setup(sc, ATH9K_WME_AC_VI)) {
1585                 DPRINTF(ah, ATH_DBG_FATAL,
1586                         "Unable to setup xmit queue for VI traffic\n");
1587                 r = -EIO;
1588                 goto bad2;
1589         }
1590         if (!ath_tx_setup(sc, ATH9K_WME_AC_VO)) {
1591                 DPRINTF(ah, ATH_DBG_FATAL,
1592                         "Unable to setup xmit queue for VO traffic\n");
1593                 r = -EIO;
1594                 goto bad2;
1595         }
1596
1597         /* Initializes the noise floor to a reasonable default value.
1598          * Later on this will be updated during ANI processing. */
1599
1600         sc->ani.noise_floor = ATH_DEFAULT_NOISE_FLOOR;
1601         setup_timer(&sc->ani.timer, ath_ani_calibrate, (unsigned long)sc);
1602
1603         if (ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
1604                                    ATH9K_CIPHER_TKIP, NULL)) {
1605                 /*
1606                  * Whether we should enable h/w TKIP MIC.
1607                  * XXX: if we don't support WME TKIP MIC, then we wouldn't
1608                  * report WMM capable, so it's always safe to turn on
1609                  * TKIP MIC in this case.
1610                  */
1611                 ath9k_hw_setcapability(sc->sc_ah, ATH9K_CAP_TKIP_MIC,
1612                                        0, 1, NULL);
1613         }
1614
1615         /*
1616          * Check whether the separate key cache entries
1617          * are required to handle both tx+rx MIC keys.
1618          * With split mic keys the number of stations is limited
1619          * to 27 otherwise 59.
1620          */
1621         if (ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
1622                                    ATH9K_CIPHER_TKIP, NULL)
1623             && ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
1624                                       ATH9K_CIPHER_MIC, NULL)
1625             && ath9k_hw_getcapability(ah, ATH9K_CAP_TKIP_SPLIT,
1626                                       0, NULL))
1627                 sc->splitmic = 1;
1628
1629         /* turn on mcast key search if possible */
1630         if (!ath9k_hw_getcapability(ah, ATH9K_CAP_MCAST_KEYSRCH, 0, NULL))
1631                 (void)ath9k_hw_setcapability(ah, ATH9K_CAP_MCAST_KEYSRCH, 1,
1632                                              1, NULL);
1633
1634         sc->config.txpowlimit = ATH_TXPOWER_MAX;
1635
1636         /* 11n Capabilities */
1637         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
1638                 sc->sc_flags |= SC_OP_TXAGGR;
1639                 sc->sc_flags |= SC_OP_RXAGGR;
1640         }
1641
1642         sc->tx_chainmask = ah->caps.tx_chainmask;
1643         sc->rx_chainmask = ah->caps.rx_chainmask;
1644
1645         ath9k_hw_setcapability(ah, ATH9K_CAP_DIVERSITY, 1, true, NULL);
1646         sc->rx.defant = ath9k_hw_getdefantenna(ah);
1647
1648         if (ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK)
1649                 memcpy(sc->bssidmask, ath_bcast_mac, ETH_ALEN);
1650
1651         sc->beacon.slottime = ATH9K_SLOT_TIME_9;        /* default to short slot time */
1652
1653         /* initialize beacon slots */
1654         for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {
1655                 sc->beacon.bslot[i] = NULL;
1656                 sc->beacon.bslot_aphy[i] = NULL;
1657         }
1658
1659         /* setup channels and rates */
1660
1661         sc->sbands[IEEE80211_BAND_2GHZ].channels = ath9k_2ghz_chantable;
1662         sc->sbands[IEEE80211_BAND_2GHZ].bitrates =
1663                 sc->rates[IEEE80211_BAND_2GHZ];
1664         sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
1665         sc->sbands[IEEE80211_BAND_2GHZ].n_channels =
1666                 ARRAY_SIZE(ath9k_2ghz_chantable);
1667
1668         if (test_bit(ATH9K_MODE_11A, sc->sc_ah->caps.wireless_modes)) {
1669                 sc->sbands[IEEE80211_BAND_5GHZ].channels = ath9k_5ghz_chantable;
1670                 sc->sbands[IEEE80211_BAND_5GHZ].bitrates =
1671                         sc->rates[IEEE80211_BAND_5GHZ];
1672                 sc->sbands[IEEE80211_BAND_5GHZ].band = IEEE80211_BAND_5GHZ;
1673                 sc->sbands[IEEE80211_BAND_5GHZ].n_channels =
1674                         ARRAY_SIZE(ath9k_5ghz_chantable);
1675         }
1676
1677         switch (ah->btcoex_info.btcoex_scheme) {
1678         case ATH_BTCOEX_CFG_NONE:
1679                 break;
1680         case ATH_BTCOEX_CFG_2WIRE:
1681                 ath9k_hw_btcoex_init_2wire(ah);
1682                 break;
1683         case ATH_BTCOEX_CFG_3WIRE:
1684                 ath9k_hw_btcoex_init_3wire(ah);
1685                 r = ath_init_btcoex_timer(sc);
1686                 if (r)
1687                         goto bad2;
1688                 qnum = ath_tx_get_qnum(sc, ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BE);
1689                 ath9k_hw_init_btcoex_hw_info(ah, qnum);
1690                 sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
1691                 break;
1692         default:
1693                 WARN_ON(1);
1694                 break;
1695         }
1696
1697         return 0;
1698 bad2:
1699         /* cleanup tx queues */
1700         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
1701                 if (ATH_TXQ_SETUP(sc, i))
1702                         ath_tx_cleanupq(sc, &sc->tx.txq[i]);
1703 bad:
1704         ath9k_hw_detach(ah);
1705 bad_no_ah:
1706         ath9k_exit_debug(sc->sc_ah);
1707         sc->sc_ah = NULL;
1708
1709         return r;
1710 }
1711
1712 void ath_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
1713 {
1714         hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
1715                 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
1716                 IEEE80211_HW_SIGNAL_DBM |
1717                 IEEE80211_HW_AMPDU_AGGREGATION |
1718                 IEEE80211_HW_SUPPORTS_PS |
1719                 IEEE80211_HW_PS_NULLFUNC_STACK |
1720                 IEEE80211_HW_SPECTRUM_MGMT;
1721
1722         if (AR_SREV_9160_10_OR_LATER(sc->sc_ah) || modparam_nohwcrypt)
1723                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
1724
1725         hw->wiphy->interface_modes =
1726                 BIT(NL80211_IFTYPE_AP) |
1727                 BIT(NL80211_IFTYPE_STATION) |
1728                 BIT(NL80211_IFTYPE_ADHOC) |
1729                 BIT(NL80211_IFTYPE_MESH_POINT);
1730
1731         hw->queues = 4;
1732         hw->max_rates = 4;
1733         hw->channel_change_time = 5000;
1734         hw->max_listen_interval = 10;
1735         /* Hardware supports 10 but we use 4 */
1736         hw->max_rate_tries = 4;
1737         hw->sta_data_size = sizeof(struct ath_node);
1738         hw->vif_data_size = sizeof(struct ath_vif);
1739
1740         hw->rate_control_algorithm = "ath9k_rate_control";
1741
1742         hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1743                 &sc->sbands[IEEE80211_BAND_2GHZ];
1744         if (test_bit(ATH9K_MODE_11A, sc->sc_ah->caps.wireless_modes))
1745                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1746                         &sc->sbands[IEEE80211_BAND_5GHZ];
1747 }
1748
1749 /* Device driver core initialization */
1750 int ath_init_device(u16 devid, struct ath_softc *sc, u16 subsysid)
1751 {
1752         struct ieee80211_hw *hw = sc->hw;
1753         struct ath_hw *ah;
1754         int error = 0, i;
1755         struct ath_regulatory *reg;
1756
1757         dev_dbg(sc->dev, "Attach ATH hw\n");
1758
1759         error = ath_init_softc(devid, sc, subsysid);
1760         if (error != 0)
1761                 return error;
1762
1763         ah = sc->sc_ah;
1764
1765         /* get mac address from hardware and set in mac80211 */
1766
1767         SET_IEEE80211_PERM_ADDR(hw, ah->macaddr);
1768
1769         ath_set_hw_capab(sc, hw);
1770
1771         error = ath_regd_init(&sc->common.regulatory, sc->hw->wiphy,
1772                               ath9k_reg_notifier);
1773         if (error)
1774                 return error;
1775
1776         reg = &sc->common.regulatory;
1777
1778         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
1779                 setup_ht_cap(sc, &sc->sbands[IEEE80211_BAND_2GHZ].ht_cap);
1780                 if (test_bit(ATH9K_MODE_11A, ah->caps.wireless_modes))
1781                         setup_ht_cap(sc, &sc->sbands[IEEE80211_BAND_5GHZ].ht_cap);
1782         }
1783
1784         /* initialize tx/rx engine */
1785         error = ath_tx_init(sc, ATH_TXBUF);
1786         if (error != 0)
1787                 goto error_attach;
1788
1789         error = ath_rx_init(sc, ATH_RXBUF);
1790         if (error != 0)
1791                 goto error_attach;
1792
1793         INIT_WORK(&sc->chan_work, ath9k_wiphy_chan_work);
1794         INIT_DELAYED_WORK(&sc->wiphy_work, ath9k_wiphy_work);
1795         sc->wiphy_scheduler_int = msecs_to_jiffies(500);
1796
1797         error = ieee80211_register_hw(hw);
1798
1799         if (!ath_is_world_regd(reg)) {
1800                 error = regulatory_hint(hw->wiphy, reg->alpha2);
1801                 if (error)
1802                         goto error_attach;
1803         }
1804
1805         /* Initialize LED control */
1806         ath_init_leds(sc);
1807
1808         ath_start_rfkill_poll(sc);
1809
1810         return 0;
1811
1812 error_attach:
1813         /* cleanup tx queues */
1814         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
1815                 if (ATH_TXQ_SETUP(sc, i))
1816                         ath_tx_cleanupq(sc, &sc->tx.txq[i]);
1817
1818         ath9k_hw_detach(ah);
1819         ath9k_exit_debug(ah);
1820         sc->sc_ah = NULL;
1821
1822         return error;
1823 }
1824
1825 int ath_reset(struct ath_softc *sc, bool retry_tx)
1826 {
1827         struct ath_hw *ah = sc->sc_ah;
1828         struct ieee80211_hw *hw = sc->hw;
1829         int r;
1830
1831         ath9k_hw_set_interrupts(ah, 0);
1832         ath_drain_all_txq(sc, retry_tx);
1833         ath_stoprecv(sc);
1834         ath_flushrecv(sc);
1835
1836         spin_lock_bh(&sc->sc_resetlock);
1837         r = ath9k_hw_reset(ah, sc->sc_ah->curchan, false);
1838         if (r)
1839                 DPRINTF(ah, ATH_DBG_FATAL,
1840                         "Unable to reset hardware; reset status %d\n", r);
1841         spin_unlock_bh(&sc->sc_resetlock);
1842
1843         if (ath_startrecv(sc) != 0)
1844                 DPRINTF(ah, ATH_DBG_FATAL, "Unable to start recv logic\n");
1845
1846         /*
1847          * We may be doing a reset in response to a request
1848          * that changes the channel so update any state that
1849          * might change as a result.
1850          */
1851         ath_cache_conf_rate(sc, &hw->conf);
1852
1853         ath_update_txpow(sc);
1854
1855         if (sc->sc_flags & SC_OP_BEACONS)
1856                 ath_beacon_config(sc, NULL);    /* restart beacons */
1857
1858         ath9k_hw_set_interrupts(ah, sc->imask);
1859
1860         if (retry_tx) {
1861                 int i;
1862                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1863                         if (ATH_TXQ_SETUP(sc, i)) {
1864                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
1865                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
1866                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
1867                         }
1868                 }
1869         }
1870
1871         return r;
1872 }
1873
1874 /*
1875  *  This function will allocate both the DMA descriptor structure, and the
1876  *  buffers it contains.  These are used to contain the descriptors used
1877  *  by the system.
1878 */
1879 int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
1880                       struct list_head *head, const char *name,
1881                       int nbuf, int ndesc)
1882 {
1883 #define DS2PHYS(_dd, _ds)                                               \
1884         ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
1885 #define ATH_DESC_4KB_BOUND_CHECK(_daddr) ((((_daddr) & 0xFFF) > 0xF7F) ? 1 : 0)
1886 #define ATH_DESC_4KB_BOUND_NUM_SKIPPED(_len) ((_len) / 4096)
1887
1888         struct ath_desc *ds;
1889         struct ath_buf *bf;
1890         int i, bsize, error;
1891
1892         DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "%s DMA: %u buffers %u desc/buf\n",
1893                 name, nbuf, ndesc);
1894
1895         INIT_LIST_HEAD(head);
1896         /* ath_desc must be a multiple of DWORDs */
1897         if ((sizeof(struct ath_desc) % 4) != 0) {
1898                 DPRINTF(sc->sc_ah, ATH_DBG_FATAL, "ath_desc not DWORD aligned\n");
1899                 ASSERT((sizeof(struct ath_desc) % 4) == 0);
1900                 error = -ENOMEM;
1901                 goto fail;
1902         }
1903
1904         dd->dd_desc_len = sizeof(struct ath_desc) * nbuf * ndesc;
1905
1906         /*
1907          * Need additional DMA memory because we can't use
1908          * descriptors that cross the 4K page boundary. Assume
1909          * one skipped descriptor per 4K page.
1910          */
1911         if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_4KB_SPLITTRANS)) {
1912                 u32 ndesc_skipped =
1913                         ATH_DESC_4KB_BOUND_NUM_SKIPPED(dd->dd_desc_len);
1914                 u32 dma_len;
1915
1916                 while (ndesc_skipped) {
1917                         dma_len = ndesc_skipped * sizeof(struct ath_desc);
1918                         dd->dd_desc_len += dma_len;
1919
1920                         ndesc_skipped = ATH_DESC_4KB_BOUND_NUM_SKIPPED(dma_len);
1921                 };
1922         }
1923
1924         /* allocate descriptors */
1925         dd->dd_desc = dma_alloc_coherent(sc->dev, dd->dd_desc_len,
1926                                          &dd->dd_desc_paddr, GFP_KERNEL);
1927         if (dd->dd_desc == NULL) {
1928                 error = -ENOMEM;
1929                 goto fail;
1930         }
1931         ds = dd->dd_desc;
1932         DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "%s DMA map: %p (%u) -> %llx (%u)\n",
1933                 name, ds, (u32) dd->dd_desc_len,
1934                 ito64(dd->dd_desc_paddr), /*XXX*/(u32) dd->dd_desc_len);
1935
1936         /* allocate buffers */
1937         bsize = sizeof(struct ath_buf) * nbuf;
1938         bf = kzalloc(bsize, GFP_KERNEL);
1939         if (bf == NULL) {
1940                 error = -ENOMEM;
1941                 goto fail2;
1942         }
1943         dd->dd_bufptr = bf;
1944
1945         for (i = 0; i < nbuf; i++, bf++, ds += ndesc) {
1946                 bf->bf_desc = ds;
1947                 bf->bf_daddr = DS2PHYS(dd, ds);
1948
1949                 if (!(sc->sc_ah->caps.hw_caps &
1950                       ATH9K_HW_CAP_4KB_SPLITTRANS)) {
1951                         /*
1952                          * Skip descriptor addresses which can cause 4KB
1953                          * boundary crossing (addr + length) with a 32 dword
1954                          * descriptor fetch.
1955                          */
1956                         while (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr)) {
1957                                 ASSERT((caddr_t) bf->bf_desc <
1958                                        ((caddr_t) dd->dd_desc +
1959                                         dd->dd_desc_len));
1960
1961                                 ds += ndesc;
1962                                 bf->bf_desc = ds;
1963                                 bf->bf_daddr = DS2PHYS(dd, ds);
1964                         }
1965                 }
1966                 list_add_tail(&bf->list, head);
1967         }
1968         return 0;
1969 fail2:
1970         dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
1971                           dd->dd_desc_paddr);
1972 fail:
1973         memset(dd, 0, sizeof(*dd));
1974         return error;
1975 #undef ATH_DESC_4KB_BOUND_CHECK
1976 #undef ATH_DESC_4KB_BOUND_NUM_SKIPPED
1977 #undef DS2PHYS
1978 }
1979
1980 void ath_descdma_cleanup(struct ath_softc *sc,
1981                          struct ath_descdma *dd,
1982                          struct list_head *head)
1983 {
1984         dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
1985                           dd->dd_desc_paddr);
1986
1987         INIT_LIST_HEAD(head);
1988         kfree(dd->dd_bufptr);
1989         memset(dd, 0, sizeof(*dd));
1990 }
1991
1992 int ath_get_hal_qnum(u16 queue, struct ath_softc *sc)
1993 {
1994         int qnum;
1995
1996         switch (queue) {
1997         case 0:
1998                 qnum = sc->tx.hwq_map[ATH9K_WME_AC_VO];
1999                 break;
2000         case 1:
2001                 qnum = sc->tx.hwq_map[ATH9K_WME_AC_VI];
2002                 break;
2003         case 2:
2004                 qnum = sc->tx.hwq_map[ATH9K_WME_AC_BE];
2005                 break;
2006         case 3:
2007                 qnum = sc->tx.hwq_map[ATH9K_WME_AC_BK];
2008                 break;
2009         default:
2010                 qnum = sc->tx.hwq_map[ATH9K_WME_AC_BE];
2011                 break;
2012         }
2013
2014         return qnum;
2015 }
2016
2017 int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc)
2018 {
2019         int qnum;
2020
2021         switch (queue) {
2022         case ATH9K_WME_AC_VO:
2023                 qnum = 0;
2024                 break;
2025         case ATH9K_WME_AC_VI:
2026                 qnum = 1;
2027                 break;
2028         case ATH9K_WME_AC_BE:
2029                 qnum = 2;
2030                 break;
2031         case ATH9K_WME_AC_BK:
2032                 qnum = 3;
2033                 break;
2034         default:
2035                 qnum = -1;
2036                 break;
2037         }
2038
2039         return qnum;
2040 }
2041
2042 /* XXX: Remove me once we don't depend on ath9k_channel for all
2043  * this redundant data */
2044 void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
2045                            struct ath9k_channel *ichan)
2046 {
2047         struct ieee80211_channel *chan = hw->conf.channel;
2048         struct ieee80211_conf *conf = &hw->conf;
2049
2050         ichan->channel = chan->center_freq;
2051         ichan->chan = chan;
2052
2053         if (chan->band == IEEE80211_BAND_2GHZ) {
2054                 ichan->chanmode = CHANNEL_G;
2055                 ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G;
2056         } else {
2057                 ichan->chanmode = CHANNEL_A;
2058                 ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
2059         }
2060
2061         sc->tx_chan_width = ATH9K_HT_MACMODE_20;
2062
2063         if (conf_is_ht(conf)) {
2064                 if (conf_is_ht40(conf))
2065                         sc->tx_chan_width = ATH9K_HT_MACMODE_2040;
2066
2067                 ichan->chanmode = ath_get_extchanmode(sc, chan,
2068                                             conf->channel_type);
2069         }
2070 }
2071
2072 /**********************/
2073 /* mac80211 callbacks */
2074 /**********************/
2075
2076 /*
2077  * (Re)start btcoex timers
2078  */
2079 static void ath9k_btcoex_timer_resume(struct ath_softc *sc)
2080 {
2081         struct ath_btcoex *btcoex = &sc->btcoex;
2082         struct ath_hw *ah = sc->sc_ah;
2083
2084         DPRINTF(ah, ATH_DBG_BTCOEX, "Starting btcoex timers");
2085
2086         /* make sure duty cycle timer is also stopped when resuming */
2087         if (btcoex->hw_timer_enabled)
2088                 ath_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
2089
2090         btcoex->bt_priority_cnt = 0;
2091         btcoex->bt_priority_time = jiffies;
2092         sc->sc_flags &= ~SC_OP_BT_PRIORITY_DETECTED;
2093
2094         mod_timer(&btcoex->period_timer, jiffies);
2095 }
2096
2097 static int ath9k_start(struct ieee80211_hw *hw)
2098 {
2099         struct ath_wiphy *aphy = hw->priv;
2100         struct ath_softc *sc = aphy->sc;
2101         struct ath_hw *ah = sc->sc_ah;
2102         struct ieee80211_channel *curchan = hw->conf.channel;
2103         struct ath9k_channel *init_channel;
2104         int r;
2105
2106         DPRINTF(ah, ATH_DBG_CONFIG, "Starting driver with "
2107                 "initial channel: %d MHz\n", curchan->center_freq);
2108
2109         mutex_lock(&sc->mutex);
2110
2111         if (ath9k_wiphy_started(sc)) {
2112                 if (sc->chan_idx == curchan->hw_value) {
2113                         /*
2114                          * Already on the operational channel, the new wiphy
2115                          * can be marked active.
2116                          */
2117                         aphy->state = ATH_WIPHY_ACTIVE;
2118                         ieee80211_wake_queues(hw);
2119                 } else {
2120                         /*
2121                          * Another wiphy is on another channel, start the new
2122                          * wiphy in paused state.
2123                          */
2124                         aphy->state = ATH_WIPHY_PAUSED;
2125                         ieee80211_stop_queues(hw);
2126                 }
2127                 mutex_unlock(&sc->mutex);
2128                 return 0;
2129         }
2130         aphy->state = ATH_WIPHY_ACTIVE;
2131
2132         /* setup initial channel */
2133
2134         sc->chan_idx = curchan->hw_value;
2135
2136         init_channel = ath_get_curchannel(sc, hw);
2137
2138         /* Reset SERDES registers */
2139         ath9k_hw_configpcipowersave(ah, 0, 0);
2140
2141         /*
2142          * The basic interface to setting the hardware in a good
2143          * state is ``reset''.  On return the hardware is known to
2144          * be powered up and with interrupts disabled.  This must
2145          * be followed by initialization of the appropriate bits
2146          * and then setup of the interrupt mask.
2147          */
2148         spin_lock_bh(&sc->sc_resetlock);
2149         r = ath9k_hw_reset(ah, init_channel, false);
2150         if (r) {
2151                 DPRINTF(ah, ATH_DBG_FATAL,
2152                         "Unable to reset hardware; reset status %d "
2153                         "(freq %u MHz)\n", r,
2154                         curchan->center_freq);
2155                 spin_unlock_bh(&sc->sc_resetlock);
2156                 goto mutex_unlock;
2157         }
2158         spin_unlock_bh(&sc->sc_resetlock);
2159
2160         /*
2161          * This is needed only to setup initial state
2162          * but it's best done after a reset.
2163          */
2164         ath_update_txpow(sc);
2165
2166         /*
2167          * Setup the hardware after reset:
2168          * The receive engine is set going.
2169          * Frame transmit is handled entirely
2170          * in the frame output path; there's nothing to do
2171          * here except setup the interrupt mask.
2172          */
2173         if (ath_startrecv(sc) != 0) {
2174                 DPRINTF(ah, ATH_DBG_FATAL, "Unable to start recv logic\n");
2175                 r = -EIO;
2176                 goto mutex_unlock;
2177         }
2178
2179         /* Setup our intr mask. */
2180         sc->imask = ATH9K_INT_RX | ATH9K_INT_TX
2181                 | ATH9K_INT_RXEOL | ATH9K_INT_RXORN
2182                 | ATH9K_INT_FATAL | ATH9K_INT_GLOBAL;
2183
2184         if (ah->caps.hw_caps & ATH9K_HW_CAP_GTT)
2185                 sc->imask |= ATH9K_INT_GTT;
2186
2187         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
2188                 sc->imask |= ATH9K_INT_CST;
2189
2190         ath_cache_conf_rate(sc, &hw->conf);
2191
2192         sc->sc_flags &= ~SC_OP_INVALID;
2193
2194         /* Disable BMISS interrupt when we're not associated */
2195         sc->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
2196         ath9k_hw_set_interrupts(ah, sc->imask);
2197
2198         ieee80211_wake_queues(hw);
2199
2200         ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
2201
2202         if ((ah->btcoex_info.btcoex_scheme != ATH_BTCOEX_CFG_NONE) &&
2203             !ah->btcoex_info.enabled) {
2204                 ath9k_hw_btcoex_init_weight(ah);
2205                 ath9k_hw_btcoex_enable(ah);
2206
2207                 ath_pcie_aspm_disable(sc);
2208                 if (ah->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_3WIRE)
2209                         ath9k_btcoex_timer_resume(sc);
2210         }
2211
2212 mutex_unlock:
2213         mutex_unlock(&sc->mutex);
2214
2215         return r;
2216 }
2217
2218 static int ath9k_tx(struct ieee80211_hw *hw,
2219                     struct sk_buff *skb)
2220 {
2221         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2222         struct ath_wiphy *aphy = hw->priv;
2223         struct ath_softc *sc = aphy->sc;
2224         struct ath_tx_control txctl;
2225         int hdrlen, padsize;
2226
2227         if (aphy->state != ATH_WIPHY_ACTIVE && aphy->state != ATH_WIPHY_SCAN) {
2228                 printk(KERN_DEBUG "ath9k: %s: TX in unexpected wiphy state "
2229                        "%d\n", wiphy_name(hw->wiphy), aphy->state);
2230                 goto exit;
2231         }
2232
2233         if (sc->ps_enabled) {
2234                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2235                 /*
2236                  * mac80211 does not set PM field for normal data frames, so we
2237                  * need to update that based on the current PS mode.
2238                  */
2239                 if (ieee80211_is_data(hdr->frame_control) &&
2240                     !ieee80211_is_nullfunc(hdr->frame_control) &&
2241                     !ieee80211_has_pm(hdr->frame_control)) {
2242                         DPRINTF(sc->sc_ah, ATH_DBG_PS, "Add PM=1 for a TX frame "
2243                                 "while in PS mode\n");
2244                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
2245                 }
2246         }
2247
2248         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
2249                 /*
2250                  * We are using PS-Poll and mac80211 can request TX while in
2251                  * power save mode. Need to wake up hardware for the TX to be
2252                  * completed and if needed, also for RX of buffered frames.
2253                  */
2254                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2255                 ath9k_ps_wakeup(sc);
2256                 ath9k_hw_setrxabort(sc->sc_ah, 0);
2257                 if (ieee80211_is_pspoll(hdr->frame_control)) {
2258                         DPRINTF(sc->sc_ah, ATH_DBG_PS, "Sending PS-Poll to pick a "
2259                                 "buffered frame\n");
2260                         sc->sc_flags |= SC_OP_WAIT_FOR_PSPOLL_DATA;
2261                 } else {
2262                         DPRINTF(sc->sc_ah, ATH_DBG_PS, "Wake up to complete TX\n");
2263                         sc->sc_flags |= SC_OP_WAIT_FOR_TX_ACK;
2264                 }
2265                 /*
2266                  * The actual restore operation will happen only after
2267                  * the sc_flags bit is cleared. We are just dropping
2268                  * the ps_usecount here.
2269                  */
2270                 ath9k_ps_restore(sc);
2271         }
2272
2273         memset(&txctl, 0, sizeof(struct ath_tx_control));
2274
2275         /*
2276          * As a temporary workaround, assign seq# here; this will likely need
2277          * to be cleaned up to work better with Beacon transmission and virtual
2278          * BSSes.
2279          */
2280         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
2281                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2282                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
2283                         sc->tx.seq_no += 0x10;
2284                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
2285                 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
2286         }
2287
2288         /* Add the padding after the header if this is not already done */
2289         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
2290         if (hdrlen & 3) {
2291                 padsize = hdrlen % 4;
2292                 if (skb_headroom(skb) < padsize)
2293                         return -1;
2294                 skb_push(skb, padsize);
2295                 memmove(skb->data, skb->data + padsize, hdrlen);
2296         }
2297
2298         /* Check if a tx queue is available */
2299
2300         txctl.txq = ath_test_get_txq(sc, skb);
2301         if (!txctl.txq)
2302                 goto exit;
2303
2304         DPRINTF(sc->sc_ah, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
2305
2306         if (ath_tx_start(hw, skb, &txctl) != 0) {
2307                 DPRINTF(sc->sc_ah, ATH_DBG_XMIT, "TX failed\n");
2308                 goto exit;
2309         }
2310
2311         return 0;
2312 exit:
2313         dev_kfree_skb_any(skb);
2314         return 0;
2315 }
2316
2317 /*
2318  * Pause btcoex timer and bt duty cycle timer
2319  */
2320 static void ath9k_btcoex_timer_pause(struct ath_softc *sc)
2321 {
2322         struct ath_btcoex *btcoex = &sc->btcoex;
2323         struct ath_hw *ah = sc->sc_ah;
2324
2325         del_timer_sync(&btcoex->period_timer);
2326
2327         if (btcoex->hw_timer_enabled)
2328                 ath_gen_timer_stop(ah, btcoex->no_stomp_timer);
2329
2330         btcoex->hw_timer_enabled = false;
2331 }
2332
2333 static void ath9k_stop(struct ieee80211_hw *hw)
2334 {
2335         struct ath_wiphy *aphy = hw->priv;
2336         struct ath_softc *sc = aphy->sc;
2337         struct ath_hw *ah = sc->sc_ah;
2338
2339         mutex_lock(&sc->mutex);
2340
2341         aphy->state = ATH_WIPHY_INACTIVE;
2342
2343         cancel_delayed_work_sync(&sc->ath_led_blink_work);
2344         cancel_delayed_work_sync(&sc->tx_complete_work);
2345
2346         if (!sc->num_sec_wiphy) {
2347                 cancel_delayed_work_sync(&sc->wiphy_work);
2348                 cancel_work_sync(&sc->chan_work);
2349         }
2350
2351         if (sc->sc_flags & SC_OP_INVALID) {
2352                 DPRINTF(ah, ATH_DBG_ANY, "Device not present\n");
2353                 mutex_unlock(&sc->mutex);
2354                 return;
2355         }
2356
2357         if (ath9k_wiphy_started(sc)) {
2358                 mutex_unlock(&sc->mutex);
2359                 return; /* another wiphy still in use */
2360         }
2361
2362         if (ah->btcoex_info.enabled) {
2363                 ath9k_hw_btcoex_disable(ah);
2364                 if (ah->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_3WIRE)
2365                         ath9k_btcoex_timer_pause(sc);
2366         }
2367
2368         /* make sure h/w will not generate any interrupt
2369          * before setting the invalid flag. */
2370         ath9k_hw_set_interrupts(ah, 0);
2371
2372         if (!(sc->sc_flags & SC_OP_INVALID)) {
2373                 ath_drain_all_txq(sc, false);
2374                 ath_stoprecv(sc);
2375                 ath9k_hw_phy_disable(ah);
2376         } else
2377                 sc->rx.rxlink = NULL;
2378
2379         /* disable HAL and put h/w to sleep */
2380         ath9k_hw_disable(ah);
2381         ath9k_hw_configpcipowersave(ah, 1, 1);
2382         ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP);
2383
2384         sc->sc_flags |= SC_OP_INVALID;
2385
2386         mutex_unlock(&sc->mutex);
2387
2388         DPRINTF(ah, ATH_DBG_CONFIG, "Driver halt\n");
2389 }
2390
2391 static int ath9k_add_interface(struct ieee80211_hw *hw,
2392                                struct ieee80211_if_init_conf *conf)
2393 {
2394         struct ath_wiphy *aphy = hw->priv;
2395         struct ath_softc *sc = aphy->sc;
2396         struct ath_vif *avp = (void *)conf->vif->drv_priv;
2397         enum nl80211_iftype ic_opmode = NL80211_IFTYPE_UNSPECIFIED;
2398         int ret = 0;
2399
2400         mutex_lock(&sc->mutex);
2401
2402         if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK) &&
2403             sc->nvifs > 0) {
2404                 ret = -ENOBUFS;
2405                 goto out;
2406         }
2407
2408         switch (conf->type) {
2409         case NL80211_IFTYPE_STATION:
2410                 ic_opmode = NL80211_IFTYPE_STATION;
2411                 break;
2412         case NL80211_IFTYPE_ADHOC:
2413         case NL80211_IFTYPE_AP:
2414         case NL80211_IFTYPE_MESH_POINT:
2415                 if (sc->nbcnvifs >= ATH_BCBUF) {
2416                         ret = -ENOBUFS;
2417                         goto out;
2418                 }
2419                 ic_opmode = conf->type;
2420                 break;
2421         default:
2422                 DPRINTF(sc->sc_ah, ATH_DBG_FATAL,
2423                         "Interface type %d not yet supported\n", conf->type);
2424                 ret = -EOPNOTSUPP;
2425                 goto out;
2426         }
2427
2428         DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "Attach a VIF of type: %d\n", ic_opmode);
2429
2430         /* Set the VIF opmode */
2431         avp->av_opmode = ic_opmode;
2432         avp->av_bslot = -1;
2433
2434         sc->nvifs++;
2435
2436         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK)
2437                 ath9k_set_bssid_mask(hw);
2438
2439         if (sc->nvifs > 1)
2440                 goto out; /* skip global settings for secondary vif */
2441
2442         if (ic_opmode == NL80211_IFTYPE_AP) {
2443                 ath9k_hw_set_tsfadjust(sc->sc_ah, 1);
2444                 sc->sc_flags |= SC_OP_TSF_RESET;
2445         }
2446
2447         /* Set the device opmode */
2448         sc->sc_ah->opmode = ic_opmode;
2449
2450         /*
2451          * Enable MIB interrupts when there are hardware phy counters.
2452          * Note we only do this (at the moment) for station mode.
2453          */
2454         if ((conf->type == NL80211_IFTYPE_STATION) ||
2455             (conf->type == NL80211_IFTYPE_ADHOC) ||
2456             (conf->type == NL80211_IFTYPE_MESH_POINT)) {
2457                 sc->imask |= ATH9K_INT_MIB;
2458                 sc->imask |= ATH9K_INT_TSFOOR;
2459         }
2460
2461         ath9k_hw_set_interrupts(sc->sc_ah, sc->imask);
2462
2463         if (conf->type == NL80211_IFTYPE_AP    ||
2464             conf->type == NL80211_IFTYPE_ADHOC ||
2465             conf->type == NL80211_IFTYPE_MONITOR)
2466                 ath_start_ani(sc);
2467
2468 out:
2469         mutex_unlock(&sc->mutex);
2470         return ret;
2471 }
2472
2473 static void ath9k_remove_interface(struct ieee80211_hw *hw,
2474                                    struct ieee80211_if_init_conf *conf)
2475 {
2476         struct ath_wiphy *aphy = hw->priv;
2477         struct ath_softc *sc = aphy->sc;
2478         struct ath_vif *avp = (void *)conf->vif->drv_priv;
2479         int i;
2480
2481         DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "Detach Interface\n");
2482
2483         mutex_lock(&sc->mutex);
2484
2485         /* Stop ANI */
2486         del_timer_sync(&sc->ani.timer);
2487
2488         /* Reclaim beacon resources */
2489         if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||
2490             (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||
2491             (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {
2492                 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
2493                 ath_beacon_return(sc, avp);
2494         }
2495
2496         sc->sc_flags &= ~SC_OP_BEACONS;
2497
2498         for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {
2499                 if (sc->beacon.bslot[i] == conf->vif) {
2500                         printk(KERN_DEBUG "%s: vif had allocated beacon "
2501                                "slot\n", __func__);
2502                         sc->beacon.bslot[i] = NULL;
2503                         sc->beacon.bslot_aphy[i] = NULL;
2504                 }
2505         }
2506
2507         sc->nvifs--;
2508
2509         mutex_unlock(&sc->mutex);
2510 }
2511
2512 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
2513 {
2514         struct ath_wiphy *aphy = hw->priv;
2515         struct ath_softc *sc = aphy->sc;
2516         struct ieee80211_conf *conf = &hw->conf;
2517         struct ath_hw *ah = sc->sc_ah;
2518         bool all_wiphys_idle = false, disable_radio = false;
2519
2520         mutex_lock(&sc->mutex);
2521
2522         /* Leave this as the first check */
2523         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
2524
2525                 spin_lock_bh(&sc->wiphy_lock);
2526                 all_wiphys_idle =  ath9k_all_wiphys_idle(sc);
2527                 spin_unlock_bh(&sc->wiphy_lock);
2528
2529                 if (conf->flags & IEEE80211_CONF_IDLE){
2530                         if (all_wiphys_idle)
2531                                 disable_radio = true;
2532                 }
2533                 else if (all_wiphys_idle) {
2534                         ath_radio_enable(sc);
2535                         DPRINTF(sc->sc_ah, ATH_DBG_CONFIG,
2536                                 "not-idle: enabling radio\n");
2537                 }
2538         }
2539
2540         if (changed & IEEE80211_CONF_CHANGE_PS) {
2541                 if (conf->flags & IEEE80211_CONF_PS) {
2542                         if (!(ah->caps.hw_caps &
2543                               ATH9K_HW_CAP_AUTOSLEEP)) {
2544                                 if ((sc->imask & ATH9K_INT_TIM_TIMER) == 0) {
2545                                         sc->imask |= ATH9K_INT_TIM_TIMER;
2546                                         ath9k_hw_set_interrupts(sc->sc_ah,
2547                                                         sc->imask);
2548                                 }
2549                                 ath9k_hw_setrxabort(sc->sc_ah, 1);
2550                         }
2551                         sc->ps_enabled = true;
2552                 } else {
2553                         sc->ps_enabled = false;
2554                         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
2555                         if (!(ah->caps.hw_caps &
2556                               ATH9K_HW_CAP_AUTOSLEEP)) {
2557                                 ath9k_hw_setrxabort(sc->sc_ah, 0);
2558                                 sc->sc_flags &= ~(SC_OP_WAIT_FOR_BEACON |
2559                                                   SC_OP_WAIT_FOR_CAB |
2560                                                   SC_OP_WAIT_FOR_PSPOLL_DATA |
2561                                                   SC_OP_WAIT_FOR_TX_ACK);
2562                                 if (sc->imask & ATH9K_INT_TIM_TIMER) {
2563                                         sc->imask &= ~ATH9K_INT_TIM_TIMER;
2564                                         ath9k_hw_set_interrupts(sc->sc_ah,
2565                                                         sc->imask);
2566                                 }
2567                         }
2568                 }
2569         }
2570
2571         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
2572                 struct ieee80211_channel *curchan = hw->conf.channel;
2573                 int pos = curchan->hw_value;
2574
2575                 aphy->chan_idx = pos;
2576                 aphy->chan_is_ht = conf_is_ht(conf);
2577
2578                 if (aphy->state == ATH_WIPHY_SCAN ||
2579                     aphy->state == ATH_WIPHY_ACTIVE)
2580                         ath9k_wiphy_pause_all_forced(sc, aphy);
2581                 else {
2582                         /*
2583                          * Do not change operational channel based on a paused
2584                          * wiphy changes.
2585                          */
2586                         goto skip_chan_change;
2587                 }
2588
2589                 DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
2590                         curchan->center_freq);
2591
2592                 /* XXX: remove me eventualy */
2593                 ath9k_update_ichannel(sc, hw, &sc->sc_ah->channels[pos]);
2594
2595                 ath_update_chainmask(sc, conf_is_ht(conf));
2596
2597                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
2598                         DPRINTF(sc->sc_ah, ATH_DBG_FATAL, "Unable to set channel\n");
2599                         mutex_unlock(&sc->mutex);
2600                         return -EINVAL;
2601                 }
2602         }
2603
2604 skip_chan_change:
2605         if (changed & IEEE80211_CONF_CHANGE_POWER)
2606                 sc->config.txpowlimit = 2 * conf->power_level;
2607
2608         if (disable_radio) {
2609                 DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "idle: disabling radio\n");
2610                 ath_radio_disable(sc);
2611         }
2612
2613         mutex_unlock(&sc->mutex);
2614
2615         return 0;
2616 }
2617
2618 #define SUPPORTED_FILTERS                       \
2619         (FIF_PROMISC_IN_BSS |                   \
2620         FIF_ALLMULTI |                          \
2621         FIF_CONTROL |                           \
2622         FIF_PSPOLL |                            \
2623         FIF_OTHER_BSS |                         \
2624         FIF_BCN_PRBRESP_PROMISC |               \
2625         FIF_FCSFAIL)
2626
2627 /* FIXME: sc->sc_full_reset ? */
2628 static void ath9k_configure_filter(struct ieee80211_hw *hw,
2629                                    unsigned int changed_flags,
2630                                    unsigned int *total_flags,
2631                                    u64 multicast)
2632 {
2633         struct ath_wiphy *aphy = hw->priv;
2634         struct ath_softc *sc = aphy->sc;
2635         u32 rfilt;
2636
2637         changed_flags &= SUPPORTED_FILTERS;
2638         *total_flags &= SUPPORTED_FILTERS;
2639
2640         sc->rx.rxfilter = *total_flags;
2641         ath9k_ps_wakeup(sc);
2642         rfilt = ath_calcrxfilter(sc);
2643         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
2644         ath9k_ps_restore(sc);
2645
2646         DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "Set HW RX filter: 0x%x\n", rfilt);
2647 }
2648
2649 static void ath9k_sta_notify(struct ieee80211_hw *hw,
2650                              struct ieee80211_vif *vif,
2651                              enum sta_notify_cmd cmd,
2652                              struct ieee80211_sta *sta)
2653 {
2654         struct ath_wiphy *aphy = hw->priv;
2655         struct ath_softc *sc = aphy->sc;
2656
2657         switch (cmd) {
2658         case STA_NOTIFY_ADD:
2659                 ath_node_attach(sc, sta);
2660                 break;
2661         case STA_NOTIFY_REMOVE:
2662                 ath_node_detach(sc, sta);
2663                 break;
2664         default:
2665                 break;
2666         }
2667 }
2668
2669 static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
2670                          const struct ieee80211_tx_queue_params *params)
2671 {
2672         struct ath_wiphy *aphy = hw->priv;
2673         struct ath_softc *sc = aphy->sc;
2674         struct ath9k_tx_queue_info qi;
2675         int ret = 0, qnum;
2676
2677         if (queue >= WME_NUM_AC)
2678                 return 0;
2679
2680         mutex_lock(&sc->mutex);
2681
2682         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
2683
2684         qi.tqi_aifs = params->aifs;
2685         qi.tqi_cwmin = params->cw_min;
2686         qi.tqi_cwmax = params->cw_max;
2687         qi.tqi_burstTime = params->txop;
2688         qnum = ath_get_hal_qnum(queue, sc);
2689
2690         DPRINTF(sc->sc_ah, ATH_DBG_CONFIG,
2691                 "Configure tx [queue/halq] [%d/%d],  "
2692                 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
2693                 queue, qnum, params->aifs, params->cw_min,
2694                 params->cw_max, params->txop);
2695
2696         ret = ath_txq_update(sc, qnum, &qi);
2697         if (ret)
2698                 DPRINTF(sc->sc_ah, ATH_DBG_FATAL, "TXQ Update failed\n");
2699
2700         mutex_unlock(&sc->mutex);
2701
2702         return ret;
2703 }
2704
2705 static int ath9k_set_key(struct ieee80211_hw *hw,
2706                          enum set_key_cmd cmd,
2707                          struct ieee80211_vif *vif,
2708                          struct ieee80211_sta *sta,
2709                          struct ieee80211_key_conf *key)
2710 {
2711         struct ath_wiphy *aphy = hw->priv;
2712         struct ath_softc *sc = aphy->sc;
2713         int ret = 0;
2714
2715         if (modparam_nohwcrypt)
2716                 return -ENOSPC;
2717
2718         mutex_lock(&sc->mutex);
2719         ath9k_ps_wakeup(sc);
2720         DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "Set HW Key\n");
2721
2722         switch (cmd) {
2723         case SET_KEY:
2724                 ret = ath_key_config(sc, vif, sta, key);
2725                 if (ret >= 0) {
2726                         key->hw_key_idx = ret;
2727                         /* push IV and Michael MIC generation to stack */
2728                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2729                         if (key->alg == ALG_TKIP)
2730                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2731                         if (sc->sc_ah->sw_mgmt_crypto && key->alg == ALG_CCMP)
2732                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
2733                         ret = 0;
2734                 }
2735                 break;
2736         case DISABLE_KEY:
2737                 ath_key_delete(sc, key);
2738                 break;
2739         default:
2740                 ret = -EINVAL;
2741         }
2742
2743         ath9k_ps_restore(sc);
2744         mutex_unlock(&sc->mutex);
2745
2746         return ret;
2747 }
2748
2749 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
2750                                    struct ieee80211_vif *vif,
2751                                    struct ieee80211_bss_conf *bss_conf,
2752                                    u32 changed)
2753 {
2754         struct ath_wiphy *aphy = hw->priv;
2755         struct ath_softc *sc = aphy->sc;
2756         struct ath_hw *ah = sc->sc_ah;
2757         struct ath_vif *avp = (void *)vif->drv_priv;
2758         u32 rfilt = 0;
2759         int error, i;
2760
2761         mutex_lock(&sc->mutex);
2762
2763         /*
2764          * TODO: Need to decide which hw opmode to use for
2765          *       multi-interface cases
2766          * XXX: This belongs into add_interface!
2767          */
2768         if (vif->type == NL80211_IFTYPE_AP &&
2769             ah->opmode != NL80211_IFTYPE_AP) {
2770                 ah->opmode = NL80211_IFTYPE_STATION;
2771                 ath9k_hw_setopmode(ah);
2772                 memcpy(sc->curbssid, sc->sc_ah->macaddr, ETH_ALEN);
2773                 sc->curaid = 0;
2774                 ath9k_hw_write_associd(sc);
2775                 /* Request full reset to get hw opmode changed properly */
2776                 sc->sc_flags |= SC_OP_FULL_RESET;
2777         }
2778
2779         if ((changed & BSS_CHANGED_BSSID) &&
2780             !is_zero_ether_addr(bss_conf->bssid)) {
2781                 switch (vif->type) {
2782                 case NL80211_IFTYPE_STATION:
2783                 case NL80211_IFTYPE_ADHOC:
2784                 case NL80211_IFTYPE_MESH_POINT:
2785                         /* Set BSSID */
2786                         memcpy(sc->curbssid, bss_conf->bssid, ETH_ALEN);
2787                         memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
2788                         sc->curaid = 0;
2789                         ath9k_hw_write_associd(sc);
2790
2791                         /* Set aggregation protection mode parameters */
2792                         sc->config.ath_aggr_prot = 0;
2793
2794                         DPRINTF(sc->sc_ah, ATH_DBG_CONFIG,
2795                                 "RX filter 0x%x bssid %pM aid 0x%x\n",
2796                                 rfilt, sc->curbssid, sc->curaid);
2797
2798                         /* need to reconfigure the beacon */
2799                         sc->sc_flags &= ~SC_OP_BEACONS ;
2800
2801                         break;
2802                 default:
2803                         break;
2804                 }
2805         }
2806
2807         if ((vif->type == NL80211_IFTYPE_ADHOC) ||
2808             (vif->type == NL80211_IFTYPE_AP) ||
2809             (vif->type == NL80211_IFTYPE_MESH_POINT)) {
2810                 if ((changed & BSS_CHANGED_BEACON) ||
2811                     (changed & BSS_CHANGED_BEACON_ENABLED &&
2812                      bss_conf->enable_beacon)) {
2813                         /*
2814                          * Allocate and setup the beacon frame.
2815                          *
2816                          * Stop any previous beacon DMA.  This may be
2817                          * necessary, for example, when an ibss merge
2818                          * causes reconfiguration; we may be called
2819                          * with beacon transmission active.
2820                          */
2821                         ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
2822
2823                         error = ath_beacon_alloc(aphy, vif);
2824                         if (!error)
2825                                 ath_beacon_config(sc, vif);
2826                 }
2827         }
2828
2829         /* Check for WLAN_CAPABILITY_PRIVACY ? */
2830         if ((avp->av_opmode != NL80211_IFTYPE_STATION)) {
2831                 for (i = 0; i < IEEE80211_WEP_NKID; i++)
2832                         if (ath9k_hw_keyisvalid(sc->sc_ah, (u16)i))
2833                                 ath9k_hw_keysetmac(sc->sc_ah,
2834                                                    (u16)i,
2835                                                    sc->curbssid);
2836         }
2837
2838         /* Only legacy IBSS for now */
2839         if (vif->type == NL80211_IFTYPE_ADHOC)
2840                 ath_update_chainmask(sc, 0);
2841
2842         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
2843                 DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
2844                         bss_conf->use_short_preamble);
2845                 if (bss_conf->use_short_preamble)
2846                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
2847                 else
2848                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2849         }
2850
2851         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2852                 DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
2853                         bss_conf->use_cts_prot);
2854                 if (bss_conf->use_cts_prot &&
2855                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2856                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2857                 else
2858                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2859         }
2860
2861         if (changed & BSS_CHANGED_ASSOC) {
2862                 DPRINTF(sc->sc_ah, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
2863                         bss_conf->assoc);
2864                 ath9k_bss_assoc_info(sc, vif, bss_conf);
2865         }
2866
2867         /*
2868          * The HW TSF has to be reset when the beacon interval changes.
2869          * We set the flag here, and ath_beacon_config_ap() would take this
2870          * into account when it gets called through the subsequent
2871          * config_interface() call - with IFCC_BEACON in the changed field.
2872          */
2873
2874         if (changed & BSS_CHANGED_BEACON_INT) {
2875                 sc->sc_flags |= SC_OP_TSF_RESET;
2876                 sc->beacon_interval = bss_conf->beacon_int;
2877         }
2878
2879         mutex_unlock(&sc->mutex);
2880 }
2881
2882 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
2883 {
2884         u64 tsf;
2885         struct ath_wiphy *aphy = hw->priv;
2886         struct ath_softc *sc = aphy->sc;
2887
2888         mutex_lock(&sc->mutex);
2889         tsf = ath9k_hw_gettsf64(sc->sc_ah);
2890         mutex_unlock(&sc->mutex);
2891
2892         return tsf;
2893 }
2894
2895 static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
2896 {
2897         struct ath_wiphy *aphy = hw->priv;
2898         struct ath_softc *sc = aphy->sc;
2899
2900         mutex_lock(&sc->mutex);
2901         ath9k_hw_settsf64(sc->sc_ah, tsf);
2902         mutex_unlock(&sc->mutex);
2903 }
2904
2905 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
2906 {
2907         struct ath_wiphy *aphy = hw->priv;
2908         struct ath_softc *sc = aphy->sc;
2909
2910         mutex_lock(&sc->mutex);
2911         ath9k_hw_reset_tsf(sc->sc_ah);
2912         mutex_unlock(&sc->mutex);
2913 }
2914
2915 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2916                               enum ieee80211_ampdu_mlme_action action,
2917                               struct ieee80211_sta *sta,
2918                               u16 tid, u16 *ssn)
2919 {
2920         struct ath_wiphy *aphy = hw->priv;
2921         struct ath_softc *sc = aphy->sc;
2922         int ret = 0;
2923
2924         switch (action) {
2925         case IEEE80211_AMPDU_RX_START:
2926                 if (!(sc->sc_flags & SC_OP_RXAGGR))
2927                         ret = -ENOTSUPP;
2928                 break;
2929         case IEEE80211_AMPDU_RX_STOP:
2930                 break;
2931         case IEEE80211_AMPDU_TX_START:
2932                 ath_tx_aggr_start(sc, sta, tid, ssn);
2933                 ieee80211_start_tx_ba_cb_irqsafe(hw, sta->addr, tid);
2934                 break;
2935         case IEEE80211_AMPDU_TX_STOP:
2936                 ath_tx_aggr_stop(sc, sta, tid);
2937                 ieee80211_stop_tx_ba_cb_irqsafe(hw, sta->addr, tid);
2938                 break;
2939         case IEEE80211_AMPDU_TX_OPERATIONAL:
2940                 ath_tx_aggr_resume(sc, sta, tid);
2941                 break;
2942         default:
2943                 DPRINTF(sc->sc_ah, ATH_DBG_FATAL, "Unknown AMPDU action\n");
2944         }
2945
2946         return ret;
2947 }
2948
2949 static void ath9k_sw_scan_start(struct ieee80211_hw *hw)
2950 {
2951         struct ath_wiphy *aphy = hw->priv;
2952         struct ath_softc *sc = aphy->sc;
2953
2954         mutex_lock(&sc->mutex);
2955         if (ath9k_wiphy_scanning(sc)) {
2956                 printk(KERN_DEBUG "ath9k: Two wiphys trying to scan at the "
2957                        "same time\n");
2958                 /*
2959                  * Do not allow the concurrent scanning state for now. This
2960                  * could be improved with scanning control moved into ath9k.
2961                  */
2962                 mutex_unlock(&sc->mutex);
2963                 return;
2964         }
2965
2966         aphy->state = ATH_WIPHY_SCAN;
2967         ath9k_wiphy_pause_all_forced(sc, aphy);
2968
2969         spin_lock_bh(&sc->ani_lock);
2970         sc->sc_flags |= SC_OP_SCANNING;
2971         spin_unlock_bh(&sc->ani_lock);
2972         mutex_unlock(&sc->mutex);
2973 }
2974
2975 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
2976 {
2977         struct ath_wiphy *aphy = hw->priv;
2978         struct ath_softc *sc = aphy->sc;
2979
2980         mutex_lock(&sc->mutex);
2981         spin_lock_bh(&sc->ani_lock);
2982         aphy->state = ATH_WIPHY_ACTIVE;
2983         sc->sc_flags &= ~SC_OP_SCANNING;
2984         sc->sc_flags |= SC_OP_FULL_RESET;
2985         spin_unlock_bh(&sc->ani_lock);
2986         ath_beacon_config(sc, NULL);
2987         mutex_unlock(&sc->mutex);
2988 }
2989
2990 struct ieee80211_ops ath9k_ops = {
2991         .tx                 = ath9k_tx,
2992         .start              = ath9k_start,
2993         .stop               = ath9k_stop,
2994         .add_interface      = ath9k_add_interface,
2995         .remove_interface   = ath9k_remove_interface,
2996         .config             = ath9k_config,
2997         .configure_filter   = ath9k_configure_filter,
2998         .sta_notify         = ath9k_sta_notify,
2999         .conf_tx            = ath9k_conf_tx,
3000         .bss_info_changed   = ath9k_bss_info_changed,
3001         .set_key            = ath9k_set_key,
3002         .get_tsf            = ath9k_get_tsf,
3003         .set_tsf            = ath9k_set_tsf,
3004         .reset_tsf          = ath9k_reset_tsf,
3005         .ampdu_action       = ath9k_ampdu_action,
3006         .sw_scan_start      = ath9k_sw_scan_start,
3007         .sw_scan_complete   = ath9k_sw_scan_complete,
3008         .rfkill_poll        = ath9k_rfkill_poll_state,
3009 };
3010
3011 static struct {
3012         u32 version;
3013         const char * name;
3014 } ath_mac_bb_names[] = {
3015         { AR_SREV_VERSION_5416_PCI,     "5416" },
3016         { AR_SREV_VERSION_5416_PCIE,    "5418" },
3017         { AR_SREV_VERSION_9100,         "9100" },
3018         { AR_SREV_VERSION_9160,         "9160" },
3019         { AR_SREV_VERSION_9280,         "9280" },
3020         { AR_SREV_VERSION_9285,         "9285" },
3021         { AR_SREV_VERSION_9287,         "9287" }
3022 };
3023
3024 static struct {
3025         u16 version;
3026         const char * name;
3027 } ath_rf_names[] = {
3028         { 0,                            "5133" },
3029         { AR_RAD5133_SREV_MAJOR,        "5133" },
3030         { AR_RAD5122_SREV_MAJOR,        "5122" },
3031         { AR_RAD2133_SREV_MAJOR,        "2133" },
3032         { AR_RAD2122_SREV_MAJOR,        "2122" }
3033 };
3034
3035 /*
3036  * Return the MAC/BB name. "????" is returned if the MAC/BB is unknown.
3037  */
3038 const char *
3039 ath_mac_bb_name(u32 mac_bb_version)
3040 {
3041         int i;
3042
3043         for (i=0; i<ARRAY_SIZE(ath_mac_bb_names); i++) {
3044                 if (ath_mac_bb_names[i].version == mac_bb_version) {
3045                         return ath_mac_bb_names[i].name;
3046                 }
3047         }
3048
3049         return "????";
3050 }
3051
3052 /*
3053  * Return the RF name. "????" is returned if the RF is unknown.
3054  */
3055 const char *
3056 ath_rf_name(u16 rf_version)
3057 {
3058         int i;
3059
3060         for (i=0; i<ARRAY_SIZE(ath_rf_names); i++) {
3061                 if (ath_rf_names[i].version == rf_version) {
3062                         return ath_rf_names[i].name;
3063                 }
3064         }
3065
3066         return "????";
3067 }
3068
3069 static int __init ath9k_init(void)
3070 {
3071         int error;
3072
3073         /* Register rate control algorithm */
3074         error = ath_rate_control_register();
3075         if (error != 0) {
3076                 printk(KERN_ERR
3077                         "ath9k: Unable to register rate control "
3078                         "algorithm: %d\n",
3079                         error);
3080                 goto err_out;
3081         }
3082
3083         error = ath9k_debug_create_root();
3084         if (error) {
3085                 printk(KERN_ERR
3086                         "ath9k: Unable to create debugfs root: %d\n",
3087                         error);
3088                 goto err_rate_unregister;
3089         }
3090
3091         error = ath_pci_init();
3092         if (error < 0) {
3093                 printk(KERN_ERR
3094                         "ath9k: No PCI devices found, driver not installed.\n");
3095                 error = -ENODEV;
3096                 goto err_remove_root;
3097         }
3098
3099         error = ath_ahb_init();
3100         if (error < 0) {
3101                 error = -ENODEV;
3102                 goto err_pci_exit;
3103         }
3104
3105         return 0;
3106
3107  err_pci_exit:
3108         ath_pci_exit();
3109
3110  err_remove_root:
3111         ath9k_debug_remove_root();
3112  err_rate_unregister:
3113         ath_rate_control_unregister();
3114  err_out:
3115         return error;
3116 }
3117 module_init(ath9k_init);
3118
3119 static void __exit ath9k_exit(void)
3120 {
3121         ath_ahb_exit();
3122         ath_pci_exit();
3123         ath9k_debug_remove_root();
3124         ath_rate_control_unregister();
3125         printk(KERN_INFO "%s: Driver unloaded\n", dev_info);
3126 }
3127 module_exit(ath9k_exit);