git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/ath9k/main.c

   1 /*
   2  * Copyright (c) 2008 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 "core.h"
  19 #include "reg.h"
  20 #include "hw.h"
  21
  22 #define ATH_PCI_VERSION "0.1"
  23
  24 static char *dev_info = "ath9k";
  25
  26 MODULE_AUTHOR("Atheros Communications");
  27 MODULE_DESCRIPTION("Support for Atheros 802.11n wireless LAN cards.");
  28 MODULE_SUPPORTED_DEVICE("Atheros 802.11n WLAN cards");
  29 MODULE_LICENSE("Dual BSD/GPL");
  30
  31 /* We use the hw_value as an index into our private channel structure */
  32
  33 #define CHAN2G(_freq, _idx)  { \
  34         .center_freq = (_freq), \
  35         .hw_value = (_idx), \
  36         .max_power = 30, \
  37 }
  38
  39 #define CHAN5G(_freq, _idx) { \
  40         .band = IEEE80211_BAND_5GHZ, \
  41         .center_freq = (_freq), \
  42         .hw_value = (_idx), \
  43         .max_power = 30, \
  44 }
  45
  46 /* Some 2 GHz radios are actually tunable on 2312-2732
  47  * on 5 MHz steps, we support the channels which we know
  48  * we have calibration data for all cards though to make
  49  * this static */
  50 static struct ieee80211_channel ath9k_2ghz_chantable[] = {
  51         CHAN2G(2412, 0), /* Channel 1 */
  52         CHAN2G(2417, 1), /* Channel 2 */
  53         CHAN2G(2422, 2), /* Channel 3 */
  54         CHAN2G(2427, 3), /* Channel 4 */
  55         CHAN2G(2432, 4), /* Channel 5 */
  56         CHAN2G(2437, 5), /* Channel 6 */
  57         CHAN2G(2442, 6), /* Channel 7 */
  58         CHAN2G(2447, 7), /* Channel 8 */
  59         CHAN2G(2452, 8), /* Channel 9 */
  60         CHAN2G(2457, 9), /* Channel 10 */
  61         CHAN2G(2462, 10), /* Channel 11 */
  62         CHAN2G(2467, 11), /* Channel 12 */
  63         CHAN2G(2472, 12), /* Channel 13 */
  64         CHAN2G(2484, 13), /* Channel 14 */
  65 };
  66
  67 /* Some 5 GHz radios are actually tunable on XXXX-YYYY
  68  * on 5 MHz steps, we support the channels which we know
  69  * we have calibration data for all cards though to make
  70  * this static */
  71 static struct ieee80211_channel ath9k_5ghz_chantable[] = {
  72         /* _We_ call this UNII 1 */
  73         CHAN5G(5180, 14), /* Channel 36 */
  74         CHAN5G(5200, 15), /* Channel 40 */
  75         CHAN5G(5220, 16), /* Channel 44 */
  76         CHAN5G(5240, 17), /* Channel 48 */
  77         /* _We_ call this UNII 2 */
  78         CHAN5G(5260, 18), /* Channel 52 */
  79         CHAN5G(5280, 19), /* Channel 56 */
  80         CHAN5G(5300, 20), /* Channel 60 */
  81         CHAN5G(5320, 21), /* Channel 64 */
  82         /* _We_ call this "Middle band" */
  83         CHAN5G(5500, 22), /* Channel 100 */
  84         CHAN5G(5520, 23), /* Channel 104 */
  85         CHAN5G(5540, 24), /* Channel 108 */
  86         CHAN5G(5560, 25), /* Channel 112 */
  87         CHAN5G(5580, 26), /* Channel 116 */
  88         CHAN5G(5600, 27), /* Channel 120 */
  89         CHAN5G(5620, 28), /* Channel 124 */
  90         CHAN5G(5640, 29), /* Channel 128 */
  91         CHAN5G(5660, 30), /* Channel 132 */
  92         CHAN5G(5680, 31), /* Channel 136 */
  93         CHAN5G(5700, 32), /* Channel 140 */
  94         /* _We_ call this UNII 3 */
  95         CHAN5G(5745, 33), /* Channel 149 */
  96         CHAN5G(5765, 34), /* Channel 153 */
  97         CHAN5G(5785, 35), /* Channel 157 */
  98         CHAN5G(5805, 36), /* Channel 161 */
  99         CHAN5G(5825, 37), /* Channel 165 */
 100 };
 101
 102 static void ath_cache_conf_rate(struct ath_softc *sc,
 103                                 struct ieee80211_conf *conf)
 104 {
 105         switch (conf->channel->band) {
 106         case IEEE80211_BAND_2GHZ:
 107                 if (conf_is_ht20(conf))
 108                         sc->cur_rate_table =
 109                           sc->hw_rate_table[ATH9K_MODE_11NG_HT20];
 110                 else if (conf_is_ht40_minus(conf))
 111                         sc->cur_rate_table =
 112                           sc->hw_rate_table[ATH9K_MODE_11NG_HT40MINUS];
 113                 else if (conf_is_ht40_plus(conf))
 114                         sc->cur_rate_table =
 115                           sc->hw_rate_table[ATH9K_MODE_11NG_HT40PLUS];
 116                 else
 117                         sc->cur_rate_table =
 118                           sc->hw_rate_table[ATH9K_MODE_11G];
 119                 break;
 120         case IEEE80211_BAND_5GHZ:
 121                 if (conf_is_ht20(conf))
 122                         sc->cur_rate_table =
 123                           sc->hw_rate_table[ATH9K_MODE_11NA_HT20];
 124                 else if (conf_is_ht40_minus(conf))
 125                         sc->cur_rate_table =
 126                           sc->hw_rate_table[ATH9K_MODE_11NA_HT40MINUS];
 127                 else if (conf_is_ht40_plus(conf))
 128                         sc->cur_rate_table =
 129                           sc->hw_rate_table[ATH9K_MODE_11NA_HT40PLUS];
 130                 else
 131                         sc->cur_rate_table =
 132                           sc->hw_rate_table[ATH9K_MODE_11A];
 133                 break;
 134         default:
 135                 BUG_ON(1);
 136                 break;
 137         }
 138 }
 139
 140 static void ath_update_txpow(struct ath_softc *sc)
 141 {
 142         struct ath_hal *ah = sc->sc_ah;
 143         u32 txpow;
 144
 145         if (sc->sc_curtxpow != sc->sc_config.txpowlimit) {
 146                 ath9k_hw_set_txpowerlimit(ah, sc->sc_config.txpowlimit);
 147                 /* read back in case value is clamped */
 148                 ath9k_hw_getcapability(ah, ATH9K_CAP_TXPOW, 1, &txpow);
 149                 sc->sc_curtxpow = txpow;
 150         }
 151 }
 152
 153 static u8 parse_mpdudensity(u8 mpdudensity)
 154 {
 155         /*
 156          * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
 157          *   0 for no restriction
 158          *   1 for 1/4 us
 159          *   2 for 1/2 us
 160          *   3 for 1 us
 161          *   4 for 2 us
 162          *   5 for 4 us
 163          *   6 for 8 us
 164          *   7 for 16 us
 165          */
 166         switch (mpdudensity) {
 167         case 0:
 168                 return 0;
 169         case 1:
 170         case 2:
 171         case 3:
 172                 /* Our lower layer calculations limit our precision to
 173                    1 microsecond */
 174                 return 1;
 175         case 4:
 176                 return 2;
 177         case 5:
 178                 return 4;
 179         case 6:
 180                 return 8;
 181         case 7:
 182                 return 16;
 183         default:
 184                 return 0;
 185         }
 186 }
 187
 188 static void ath_setup_rates(struct ath_softc *sc, enum ieee80211_band band)
 189 {
 190         struct ath_rate_table *rate_table = NULL;
 191         struct ieee80211_supported_band *sband;
 192         struct ieee80211_rate *rate;
 193         int i, maxrates;
 194
 195         switch (band) {
 196         case IEEE80211_BAND_2GHZ:
 197                 rate_table = sc->hw_rate_table[ATH9K_MODE_11G];
 198                 break;
 199         case IEEE80211_BAND_5GHZ:
 200                 rate_table = sc->hw_rate_table[ATH9K_MODE_11A];
 201                 break;
 202         default:
 203                 break;
 204         }
 205
 206         if (rate_table == NULL)
 207                 return;
 208
 209         sband = &sc->sbands[band];
 210         rate = sc->rates[band];
 211
 212         if (rate_table->rate_cnt > ATH_RATE_MAX)
 213                 maxrates = ATH_RATE_MAX;
 214         else
 215                 maxrates = rate_table->rate_cnt;
 216
 217         for (i = 0; i < maxrates; i++) {
 218                 rate[i].bitrate = rate_table->info[i].ratekbps / 100;
 219                 rate[i].hw_value = rate_table->info[i].ratecode;
 220                 if (rate_table->info[i].short_preamble) {
 221                         rate[i].hw_value_short = rate_table->info[i].ratecode |
 222                                 rate_table->info[i].short_preamble;
 223                         rate[i].flags = IEEE80211_RATE_SHORT_PREAMBLE;
 224                 }
 225                 sband->n_bitrates++;
 226
 227                 DPRINTF(sc, ATH_DBG_CONFIG, "Rate: %2dMbps, ratecode: %2d\n",
 228                         rate[i].bitrate / 10, rate[i].hw_value);
 229         }
 230 }
 231
 232 /*
 233  * Set/change channels.  If the channel is really being changed, it's done
 234  * by reseting the chip.  To accomplish this we must first cleanup any pending
 235  * DMA, then restart stuff.
 236 */
 237 static int ath_set_channel(struct ath_softc *sc, struct ath9k_channel *hchan)
 238 {
 239         struct ath_hal *ah = sc->sc_ah;
 240         bool fastcc = true, stopped;
 241         struct ieee80211_hw *hw = sc->hw;
 242         struct ieee80211_channel *channel = hw->conf.channel;
 243         int r;
 244
 245         if (sc->sc_flags & SC_OP_INVALID)
 246                 return -EIO;
 247
 248         ath9k_ps_wakeup(sc);
 249
 250         /*
 251          * This is only performed if the channel settings have
 252          * actually changed.
 253          *
 254          * To switch channels clear any pending DMA operations;
 255          * wait long enough for the RX fifo to drain, reset the
 256          * hardware at the new frequency, and then re-enable
 257          * the relevant bits of the h/w.
 258          */
 259         ath9k_hw_set_interrupts(ah, 0);
 260         ath_drain_all_txq(sc, false);
 261         stopped = ath_stoprecv(sc);
 262
 263         /* XXX: do not flush receive queue here. We don't want
 264          * to flush data frames already in queue because of
 265          * changing channel. */
 266
 267         if (!stopped || (sc->sc_flags & SC_OP_FULL_RESET))
 268                 fastcc = false;
 269
 270         DPRINTF(sc, ATH_DBG_CONFIG,
 271                 "(%u MHz) -> (%u MHz), chanwidth: %d\n",
 272                 sc->sc_ah->ah_curchan->channel,
 273                 channel->center_freq, sc->tx_chan_width);
 274
 275         spin_lock_bh(&sc->sc_resetlock);
 276
 277         r = ath9k_hw_reset(ah, hchan, fastcc);
 278         if (r) {
 279                 DPRINTF(sc, ATH_DBG_FATAL,
 280                         "Unable to reset channel (%u Mhz) "
 281                         "reset status %u\n",
 282                         channel->center_freq, r);
 283                 spin_unlock_bh(&sc->sc_resetlock);
 284                 return r;
 285         }
 286         spin_unlock_bh(&sc->sc_resetlock);
 287
 288         sc->sc_flags &= ~SC_OP_CHAINMASK_UPDATE;
 289         sc->sc_flags &= ~SC_OP_FULL_RESET;
 290
 291         if (ath_startrecv(sc) != 0) {
 292                 DPRINTF(sc, ATH_DBG_FATAL,
 293                         "Unable to restart recv logic\n");
 294                 return -EIO;
 295         }
 296
 297         ath_cache_conf_rate(sc, &hw->conf);
 298         ath_update_txpow(sc);
 299         ath9k_hw_set_interrupts(ah, sc->sc_imask);
 300         ath9k_ps_restore(sc);
 301         return 0;
 302 }
 303
 304 /*
 305  *  This routine performs the periodic noise floor calibration function
 306  *  that is used to adjust and optimize the chip performance.  This
 307  *  takes environmental changes (location, temperature) into account.
 308  *  When the task is complete, it reschedules itself depending on the
 309  *  appropriate interval that was calculated.
 310  */
 311 static void ath_ani_calibrate(unsigned long data)
 312 {
 313         struct ath_softc *sc;
 314         struct ath_hal *ah;
 315         bool longcal = false;
 316         bool shortcal = false;
 317         bool aniflag = false;
 318         unsigned int timestamp = jiffies_to_msecs(jiffies);
 319         u32 cal_interval;
 320
 321         sc = (struct ath_softc *)data;
 322         ah = sc->sc_ah;
 323
 324         /*
 325         * don't calibrate when we're scanning.
 326         * we are most likely not on our home channel.
 327         */
 328         if (sc->rx.rxfilter & FIF_BCN_PRBRESP_PROMISC)
 329                 return;
 330
 331         /* Long calibration runs independently of short calibration. */
 332         if ((timestamp - sc->sc_ani.sc_longcal_timer) >= ATH_LONG_CALINTERVAL) {
 333                 longcal = true;
 334                 DPRINTF(sc, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
 335                 sc->sc_ani.sc_longcal_timer = timestamp;
 336         }
 337
 338         /* Short calibration applies only while sc_caldone is false */
 339         if (!sc->sc_ani.sc_caldone) {
 340                 if ((timestamp - sc->sc_ani.sc_shortcal_timer) >=
 341                     ATH_SHORT_CALINTERVAL) {
 342                         shortcal = true;
 343                         DPRINTF(sc, ATH_DBG_ANI, "shortcal @%lu\n", jiffies);
 344                         sc->sc_ani.sc_shortcal_timer = timestamp;
 345                         sc->sc_ani.sc_resetcal_timer = timestamp;
 346                 }
 347         } else {
 348                 if ((timestamp - sc->sc_ani.sc_resetcal_timer) >=
 349                     ATH_RESTART_CALINTERVAL) {
 350                         sc->sc_ani.sc_caldone = ath9k_hw_reset_calvalid(ah);
 351                         if (sc->sc_ani.sc_caldone)
 352                                 sc->sc_ani.sc_resetcal_timer = timestamp;
 353                 }
 354         }
 355
 356         /* Verify whether we must check ANI */
 357         if ((timestamp - sc->sc_ani.sc_checkani_timer) >=
 358            ATH_ANI_POLLINTERVAL) {
 359                 aniflag = true;
 360                 sc->sc_ani.sc_checkani_timer = timestamp;
 361         }
 362
 363         /* Skip all processing if there's nothing to do. */
 364         if (longcal || shortcal || aniflag) {
 365                 /* Call ANI routine if necessary */
 366                 if (aniflag)
 367                         ath9k_hw_ani_monitor(ah, &sc->sc_halstats,
 368                                              ah->ah_curchan);
 369
 370                 /* Perform calibration if necessary */
 371                 if (longcal || shortcal) {
 372                         bool iscaldone = false;
 373
 374                         if (ath9k_hw_calibrate(ah, ah->ah_curchan,
 375                                                sc->sc_rx_chainmask, longcal,
 376                                                &iscaldone)) {
 377                                 if (longcal)
 378                                         sc->sc_ani.sc_noise_floor =
 379                                                 ath9k_hw_getchan_noise(ah,
 380                                                                ah->ah_curchan);
 381
 382                                 DPRINTF(sc, ATH_DBG_ANI,
 383                                         "calibrate chan %u/%x nf: %d\n",
 384                                         ah->ah_curchan->channel,
 385                                         ah->ah_curchan->channelFlags,
 386                                         sc->sc_ani.sc_noise_floor);
 387                         } else {
 388                                 DPRINTF(sc, ATH_DBG_ANY,
 389                                         "calibrate chan %u/%x failed\n",
 390                                         ah->ah_curchan->channel,
 391                                         ah->ah_curchan->channelFlags);
 392                         }
 393                         sc->sc_ani.sc_caldone = iscaldone;
 394                 }
 395         }
 396
 397         /*
 398         * Set timer interval based on previous results.
 399         * The interval must be the shortest necessary to satisfy ANI,
 400         * short calibration and long calibration.
 401         */
 402         cal_interval = ATH_LONG_CALINTERVAL;
 403         if (sc->sc_ah->ah_config.enable_ani)
 404                 cal_interval = min(cal_interval, (u32)ATH_ANI_POLLINTERVAL);
 405         if (!sc->sc_ani.sc_caldone)
 406                 cal_interval = min(cal_interval, (u32)ATH_SHORT_CALINTERVAL);
 407
 408         mod_timer(&sc->sc_ani.timer, jiffies + msecs_to_jiffies(cal_interval));
 409 }
 410
 411 /*
 412  * Update tx/rx chainmask. For legacy association,
 413  * hard code chainmask to 1x1, for 11n association, use
 414  * the chainmask configuration, for bt coexistence, use
 415  * the chainmask configuration even in legacy mode.
 416  */
 417 static void ath_update_chainmask(struct ath_softc *sc, int is_ht)
 418 {
 419         sc->sc_flags |= SC_OP_CHAINMASK_UPDATE;
 420         if (is_ht ||
 421             (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_BT_COEX)) {
 422                 sc->sc_tx_chainmask = sc->sc_ah->ah_caps.tx_chainmask;
 423                 sc->sc_rx_chainmask = sc->sc_ah->ah_caps.rx_chainmask;
 424         } else {
 425                 sc->sc_tx_chainmask = 1;
 426                 sc->sc_rx_chainmask = 1;
 427         }
 428
 429         DPRINTF(sc, ATH_DBG_CONFIG, "tx chmask: %d, rx chmask: %d\n",
 430                 sc->sc_tx_chainmask, sc->sc_rx_chainmask);
 431 }
 432
 433 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
 434 {
 435         struct ath_node *an;
 436
 437         an = (struct ath_node *)sta->drv_priv;
 438
 439         if (sc->sc_flags & SC_OP_TXAGGR)
 440                 ath_tx_node_init(sc, an);
 441
 442         an->maxampdu = 1 << (IEEE80211_HTCAP_MAXRXAMPDU_FACTOR +
 443                              sta->ht_cap.ampdu_factor);
 444         an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
 445 }
 446
 447 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 448 {
 449         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 450
 451         if (sc->sc_flags & SC_OP_TXAGGR)
 452                 ath_tx_node_cleanup(sc, an);
 453 }
 454
 455 static void ath9k_tasklet(unsigned long data)
 456 {
 457         struct ath_softc *sc = (struct ath_softc *)data;
 458         u32 status = sc->sc_intrstatus;
 459
 460         if (status & ATH9K_INT_FATAL) {
 461                 /* need a chip reset */
 462                 ath_reset(sc, false);
 463                 return;
 464         } else {
 465
 466                 if (status &
 467                     (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN)) {
 468                         spin_lock_bh(&sc->rx.rxflushlock);
 469                         ath_rx_tasklet(sc, 0);
 470                         spin_unlock_bh(&sc->rx.rxflushlock);
 471                 }
 472                 /* XXX: optimize this */
 473                 if (status & ATH9K_INT_TX)
 474                         ath_tx_tasklet(sc);
 475         }
 476
 477         /* re-enable hardware interrupt */
 478         ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_imask);
 479 }
 480
 481 irqreturn_t ath_isr(int irq, void *dev)
 482 {
 483         struct ath_softc *sc = dev;
 484         struct ath_hal *ah = sc->sc_ah;
 485         enum ath9k_int status;
 486         bool sched = false;
 487
 488         do {
 489                 if (sc->sc_flags & SC_OP_INVALID) {
 490                         /*
 491                          * The hardware is not ready/present, don't
 492                          * touch anything. Note this can happen early
 493                          * on if the IRQ is shared.
 494                          */
 495                         return IRQ_NONE;
 496                 }
 497                 if (!ath9k_hw_intrpend(ah)) {   /* shared irq, not for us */
 498                         return IRQ_NONE;
 499                 }
 500
 501                 /*
 502                  * Figure out the reason(s) for the interrupt.  Note
 503                  * that the hal returns a pseudo-ISR that may include
 504                  * bits we haven't explicitly enabled so we mask the
 505                  * value to insure we only process bits we requested.
 506                  */
 507                 ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
 508
 509                 status &= sc->sc_imask; /* discard unasked-for bits */
 510
 511                 /*
 512                  * If there are no status bits set, then this interrupt was not
 513                  * for me (should have been caught above).
 514                  */
 515                 if (!status)
 516                         return IRQ_NONE;
 517
 518                 sc->sc_intrstatus = status;
 519
 520                 if (status & ATH9K_INT_FATAL) {
 521                         /* need a chip reset */
 522                         sched = true;
 523                 } else if (status & ATH9K_INT_RXORN) {
 524                         /* need a chip reset */
 525                         sched = true;
 526                 } else {
 527                         if (status & ATH9K_INT_SWBA) {
 528                                 /* schedule a tasklet for beacon handling */
 529                                 tasklet_schedule(&sc->bcon_tasklet);
 530                         }
 531                         if (status & ATH9K_INT_RXEOL) {
 532                                 /*
 533                                  * NB: the hardware should re-read the link when
 534                                  *     RXE bit is written, but it doesn't work
 535                                  *     at least on older hardware revs.
 536                                  */
 537                                 sched = true;
 538                         }
 539
 540                         if (status & ATH9K_INT_TXURN)
 541                                 /* bump tx trigger level */
 542                                 ath9k_hw_updatetxtriglevel(ah, true);
 543                         /* XXX: optimize this */
 544                         if (status & ATH9K_INT_RX)
 545                                 sched = true;
 546                         if (status & ATH9K_INT_TX)
 547                                 sched = true;
 548                         if (status & ATH9K_INT_BMISS)
 549                                 sched = true;
 550                         /* carrier sense timeout */
 551                         if (status & ATH9K_INT_CST)
 552                                 sched = true;
 553                         if (status & ATH9K_INT_MIB) {
 554                                 /*
 555                                  * Disable interrupts until we service the MIB
 556                                  * interrupt; otherwise it will continue to
 557                                  * fire.
 558                                  */
 559                                 ath9k_hw_set_interrupts(ah, 0);
 560                                 /*
 561                                  * Let the hal handle the event. We assume
 562                                  * it will clear whatever condition caused
 563                                  * the interrupt.
 564                                  */
 565                                 ath9k_hw_procmibevent(ah, &sc->sc_halstats);
 566                                 ath9k_hw_set_interrupts(ah, sc->sc_imask);
 567                         }
 568                         if (status & ATH9K_INT_TIM_TIMER) {
 569                                 if (!(ah->ah_caps.hw_caps &
 570                                       ATH9K_HW_CAP_AUTOSLEEP)) {
 571                                         /* Clear RxAbort bit so that we can
 572                                          * receive frames */
 573                                         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
 574                                         ath9k_hw_setrxabort(ah, 0);
 575                                         sched = true;
 576                                         sc->sc_flags |= SC_OP_WAIT_FOR_BEACON;
 577                                 }
 578                         }
 579                 }
 580         } while (0);
 581
 582         ath_debug_stat_interrupt(sc, status);
 583
 584         if (sched) {
 585                 /* turn off every interrupt except SWBA */
 586                 ath9k_hw_set_interrupts(ah, (sc->sc_imask & ATH9K_INT_SWBA));
 587                 tasklet_schedule(&sc->intr_tq);
 588         }
 589
 590         return IRQ_HANDLED;
 591 }
 592
 593 static u32 ath_get_extchanmode(struct ath_softc *sc,
 594                                struct ieee80211_channel *chan,
 595                                enum nl80211_channel_type channel_type)
 596 {
 597         u32 chanmode = 0;
 598
 599         switch (chan->band) {
 600         case IEEE80211_BAND_2GHZ:
 601                 switch(channel_type) {
 602                 case NL80211_CHAN_NO_HT:
 603                 case NL80211_CHAN_HT20:
 604                         chanmode = CHANNEL_G_HT20;
 605                         break;
 606                 case NL80211_CHAN_HT40PLUS:
 607                         chanmode = CHANNEL_G_HT40PLUS;
 608                         break;
 609                 case NL80211_CHAN_HT40MINUS:
 610                         chanmode = CHANNEL_G_HT40MINUS;
 611                         break;
 612                 }
 613                 break;
 614         case IEEE80211_BAND_5GHZ:
 615                 switch(channel_type) {
 616                 case NL80211_CHAN_NO_HT:
 617                 case NL80211_CHAN_HT20:
 618                         chanmode = CHANNEL_A_HT20;
 619                         break;
 620                 case NL80211_CHAN_HT40PLUS:
 621                         chanmode = CHANNEL_A_HT40PLUS;
 622                         break;
 623                 case NL80211_CHAN_HT40MINUS:
 624                         chanmode = CHANNEL_A_HT40MINUS;
 625                         break;
 626                 }
 627                 break;
 628         default:
 629                 break;
 630         }
 631
 632         return chanmode;
 633 }
 634
 635 static int ath_keyset(struct ath_softc *sc, u16 keyix,
 636                struct ath9k_keyval *hk, const u8 mac[ETH_ALEN])
 637 {
 638         bool status;
 639
 640         status = ath9k_hw_set_keycache_entry(sc->sc_ah,
 641                 keyix, hk, mac, false);
 642
 643         return status != false;
 644 }
 645
 646 static int ath_setkey_tkip(struct ath_softc *sc, u16 keyix, const u8 *key,
 647                            struct ath9k_keyval *hk,
 648                            const u8 *addr)
 649 {
 650         const u8 *key_rxmic;
 651         const u8 *key_txmic;
 652
 653         key_txmic = key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY;
 654         key_rxmic = key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY;
 655
 656         if (addr == NULL) {
 657                 /* Group key installation */
 658                 memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
 659                 return ath_keyset(sc, keyix, hk, addr);
 660         }
 661         if (!sc->sc_splitmic) {
 662                 /*
 663                  * data key goes at first index,
 664                  * the hal handles the MIC keys at index+64.
 665                  */
 666                 memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
 667                 memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic));
 668                 return ath_keyset(sc, keyix, hk, addr);
 669         }
 670         /*
 671          * TX key goes at first index, RX key at +32.
 672          * The hal handles the MIC keys at index+64.
 673          */
 674         memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
 675         if (!ath_keyset(sc, keyix, hk, NULL)) {
 676                 /* Txmic entry failed. No need to proceed further */
 677                 DPRINTF(sc, ATH_DBG_KEYCACHE,
 678                         "Setting TX MIC Key Failed\n");
 679                 return 0;
 680         }
 681
 682         memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
 683         /* XXX delete tx key on failure? */
 684         return ath_keyset(sc, keyix + 32, hk, addr);
 685 }
 686
 687 static int ath_reserve_key_cache_slot_tkip(struct ath_softc *sc)
 688 {
 689         int i;
 690
 691         for (i = IEEE80211_WEP_NKID; i < sc->sc_keymax / 2; i++) {
 692                 if (test_bit(i, sc->sc_keymap) ||
 693                     test_bit(i + 64, sc->sc_keymap))
 694                         continue; /* At least one part of TKIP key allocated */
 695                 if (sc->sc_splitmic &&
 696                     (test_bit(i + 32, sc->sc_keymap) ||
 697                      test_bit(i + 64 + 32, sc->sc_keymap)))
 698                         continue; /* At least one part of TKIP key allocated */
 699
 700                 /* Found a free slot for a TKIP key */
 701                 return i;
 702         }
 703         return -1;
 704 }
 705
 706 static int ath_reserve_key_cache_slot(struct ath_softc *sc)
 707 {
 708         int i;
 709
 710         /* First, try to find slots that would not be available for TKIP. */
 711         if (sc->sc_splitmic) {
 712                 for (i = IEEE80211_WEP_NKID; i < sc->sc_keymax / 4; i++) {
 713                         if (!test_bit(i, sc->sc_keymap) &&
 714                             (test_bit(i + 32, sc->sc_keymap) ||
 715                              test_bit(i + 64, sc->sc_keymap) ||
 716                              test_bit(i + 64 + 32, sc->sc_keymap)))
 717                                 return i;
 718                         if (!test_bit(i + 32, sc->sc_keymap) &&
 719                             (test_bit(i, sc->sc_keymap) ||
 720                              test_bit(i + 64, sc->sc_keymap) ||
 721                              test_bit(i + 64 + 32, sc->sc_keymap)))
 722                                 return i + 32;
 723                         if (!test_bit(i + 64, sc->sc_keymap) &&
 724                             (test_bit(i , sc->sc_keymap) ||
 725                              test_bit(i + 32, sc->sc_keymap) ||
 726                              test_bit(i + 64 + 32, sc->sc_keymap)))
 727                                 return i + 64;
 728                         if (!test_bit(i + 64 + 32, sc->sc_keymap) &&
 729                             (test_bit(i, sc->sc_keymap) ||
 730                              test_bit(i + 32, sc->sc_keymap) ||
 731                              test_bit(i + 64, sc->sc_keymap)))
 732                                 return i + 64 + 32;
 733                 }
 734         } else {
 735                 for (i = IEEE80211_WEP_NKID; i < sc->sc_keymax / 2; i++) {
 736                         if (!test_bit(i, sc->sc_keymap) &&
 737                             test_bit(i + 64, sc->sc_keymap))
 738                                 return i;
 739                         if (test_bit(i, sc->sc_keymap) &&
 740                             !test_bit(i + 64, sc->sc_keymap))
 741                                 return i + 64;
 742                 }
 743         }
 744
 745         /* No partially used TKIP slots, pick any available slot */
 746         for (i = IEEE80211_WEP_NKID; i < sc->sc_keymax; i++) {
 747                 /* Do not allow slots that could be needed for TKIP group keys
 748                  * to be used. This limitation could be removed if we know that
 749                  * TKIP will not be used. */
 750                 if (i >= 64 && i < 64 + IEEE80211_WEP_NKID)
 751                         continue;
 752                 if (sc->sc_splitmic) {
 753                         if (i >= 32 && i < 32 + IEEE80211_WEP_NKID)
 754                                 continue;
 755                         if (i >= 64 + 32 && i < 64 + 32 + IEEE80211_WEP_NKID)
 756                                 continue;
 757                 }
 758
 759                 if (!test_bit(i, sc->sc_keymap))
 760                         return i; /* Found a free slot for a key */
 761         }
 762
 763         /* No free slot found */
 764         return -1;
 765 }
 766
 767 static int ath_key_config(struct ath_softc *sc,
 768                           struct ieee80211_sta *sta,
 769                           struct ieee80211_key_conf *key)
 770 {
 771         struct ath9k_keyval hk;
 772         const u8 *mac = NULL;
 773         int ret = 0;
 774         int idx;
 775
 776         memset(&hk, 0, sizeof(hk));
 777
 778         switch (key->alg) {
 779         case ALG_WEP:
 780                 hk.kv_type = ATH9K_CIPHER_WEP;
 781                 break;
 782         case ALG_TKIP:
 783                 hk.kv_type = ATH9K_CIPHER_TKIP;
 784                 break;
 785         case ALG_CCMP:
 786                 hk.kv_type = ATH9K_CIPHER_AES_CCM;
 787                 break;
 788         default:
 789                 return -EOPNOTSUPP;
 790         }
 791
 792         hk.kv_len = key->keylen;
 793         memcpy(hk.kv_val, key->key, key->keylen);
 794
 795         if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 796                 /* For now, use the default keys for broadcast keys. This may
 797                  * need to change with virtual interfaces. */
 798                 idx = key->keyidx;
 799         } else if (key->keyidx) {
 800                 struct ieee80211_vif *vif;
 801
 802                 if (WARN_ON(!sta))
 803                         return -EOPNOTSUPP;
 804                 mac = sta->addr;
 805
 806                 vif = sc->sc_vaps[0];
 807                 if (vif->type != NL80211_IFTYPE_AP) {
 808                         /* Only keyidx 0 should be used with unicast key, but
 809                          * allow this for client mode for now. */
 810                         idx = key->keyidx;
 811                 } else
 812                         return -EIO;
 813         } else {
 814                 if (WARN_ON(!sta))
 815                         return -EOPNOTSUPP;
 816                 mac = sta->addr;
 817
 818                 if (key->alg == ALG_TKIP)
 819                         idx = ath_reserve_key_cache_slot_tkip(sc);
 820                 else
 821                         idx = ath_reserve_key_cache_slot(sc);
 822                 if (idx < 0)
 823                         return -ENOSPC; /* no free key cache entries */
 824         }
 825
 826         if (key->alg == ALG_TKIP)
 827                 ret = ath_setkey_tkip(sc, idx, key->key, &hk, mac);
 828         else
 829                 ret = ath_keyset(sc, idx, &hk, mac);
 830
 831         if (!ret)
 832                 return -EIO;
 833
 834         set_bit(idx, sc->sc_keymap);
 835         if (key->alg == ALG_TKIP) {
 836                 set_bit(idx + 64, sc->sc_keymap);
 837                 if (sc->sc_splitmic) {
 838                         set_bit(idx + 32, sc->sc_keymap);
 839                         set_bit(idx + 64 + 32, sc->sc_keymap);
 840                 }
 841         }
 842
 843         return idx;
 844 }
 845
 846 static void ath_key_delete(struct ath_softc *sc, struct ieee80211_key_conf *key)
 847 {
 848         ath9k_hw_keyreset(sc->sc_ah, key->hw_key_idx);
 849         if (key->hw_key_idx < IEEE80211_WEP_NKID)
 850                 return;
 851
 852         clear_bit(key->hw_key_idx, sc->sc_keymap);
 853         if (key->alg != ALG_TKIP)
 854                 return;
 855
 856         clear_bit(key->hw_key_idx + 64, sc->sc_keymap);
 857         if (sc->sc_splitmic) {
 858                 clear_bit(key->hw_key_idx + 32, sc->sc_keymap);
 859                 clear_bit(key->hw_key_idx + 64 + 32, sc->sc_keymap);
 860         }
 861 }
 862
 863 static void setup_ht_cap(struct ath_softc *sc,
 864                          struct ieee80211_sta_ht_cap *ht_info)
 865 {
 866 #define ATH9K_HT_CAP_MAXRXAMPDU_65536 0x3       /* 2 ^ 16 */
 867 #define ATH9K_HT_CAP_MPDUDENSITY_8 0x6          /* 8 usec */
 868
 869         ht_info->ht_supported = true;
 870         ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 871                        IEEE80211_HT_CAP_SM_PS |
 872                        IEEE80211_HT_CAP_SGI_40 |
 873                        IEEE80211_HT_CAP_DSSSCCK40;
 874
 875         ht_info->ampdu_factor = ATH9K_HT_CAP_MAXRXAMPDU_65536;
 876         ht_info->ampdu_density = ATH9K_HT_CAP_MPDUDENSITY_8;
 877
 878         /* set up supported mcs set */
 879         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 880
 881         switch(sc->sc_rx_chainmask) {
 882         case 1:
 883                 ht_info->mcs.rx_mask[0] = 0xff;
 884                 break;
 885         case 3:
 886         case 5:
 887         case 7:
 888         default:
 889                 ht_info->mcs.rx_mask[0] = 0xff;
 890                 ht_info->mcs.rx_mask[1] = 0xff;
 891                 break;
 892         }
 893
 894         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 895 }
 896
 897 static void ath9k_bss_assoc_info(struct ath_softc *sc,
 898                                  struct ieee80211_vif *vif,
 899                                  struct ieee80211_bss_conf *bss_conf)
 900 {
 901         struct ath_vap *avp = (void *)vif->drv_priv;
 902
 903         if (bss_conf->assoc) {
 904                 DPRINTF(sc, ATH_DBG_CONFIG, "Bss Info ASSOC %d, bssid: %pM\n",
 905                         bss_conf->aid, sc->sc_curbssid);
 906
 907                 /* New association, store aid */
 908                 if (avp->av_opmode == NL80211_IFTYPE_STATION) {
 909                         sc->sc_curaid = bss_conf->aid;
 910                         ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
 911                                                sc->sc_curaid);
 912                 }
 913
 914                 /* Configure the beacon */
 915                 ath_beacon_config(sc, 0);
 916                 sc->sc_flags |= SC_OP_BEACONS;
 917
 918                 /* Reset rssi stats */
 919                 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER;
 920                 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER;
 921                 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER;
 922                 sc->sc_halstats.ns_avgtxrate = ATH_RATE_DUMMY_MARKER;
 923
 924                 /* Start ANI */
 925                 mod_timer(&sc->sc_ani.timer,
 926                         jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
 927
 928         } else {
 929                 DPRINTF(sc, ATH_DBG_CONFIG, "Bss Info DISSOC\n");
 930                 sc->sc_curaid = 0;
 931         }
 932 }
 933
 934 /********************************/
 935 /*       LED functions          */
 936 /********************************/
 937
 938 static void ath_led_brightness(struct led_classdev *led_cdev,
 939                                enum led_brightness brightness)
 940 {
 941         struct ath_led *led = container_of(led_cdev, struct ath_led, led_cdev);
 942         struct ath_softc *sc = led->sc;
 943
 944         switch (brightness) {
 945         case LED_OFF:
 946                 if (led->led_type == ATH_LED_ASSOC ||
 947                     led->led_type == ATH_LED_RADIO)
 948                         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
 949                 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN,
 950                                 (led->led_type == ATH_LED_RADIO) ? 1 :
 951                                 !!(sc->sc_flags & SC_OP_LED_ASSOCIATED));
 952                 break;
 953         case LED_FULL:
 954                 if (led->led_type == ATH_LED_ASSOC)
 955                         sc->sc_flags |= SC_OP_LED_ASSOCIATED;
 956                 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 0);
 957                 break;
 958         default:
 959                 break;
 960         }
 961 }
 962
 963 static int ath_register_led(struct ath_softc *sc, struct ath_led *led,
 964                             char *trigger)
 965 {
 966         int ret;
 967
 968         led->sc = sc;
 969         led->led_cdev.name = led->name;
 970         led->led_cdev.default_trigger = trigger;
 971         led->led_cdev.brightness_set = ath_led_brightness;
 972
 973         ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->led_cdev);
 974         if (ret)
 975                 DPRINTF(sc, ATH_DBG_FATAL,
 976                         "Failed to register led:%s", led->name);
 977         else
 978                 led->registered = 1;
 979         return ret;
 980 }
 981
 982 static void ath_unregister_led(struct ath_led *led)
 983 {
 984         if (led->registered) {
 985                 led_classdev_unregister(&led->led_cdev);
 986                 led->registered = 0;
 987         }
 988 }
 989
 990 static void ath_deinit_leds(struct ath_softc *sc)
 991 {
 992         ath_unregister_led(&sc->assoc_led);
 993         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
 994         ath_unregister_led(&sc->tx_led);
 995         ath_unregister_led(&sc->rx_led);
 996         ath_unregister_led(&sc->radio_led);
 997         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
 998 }
 999
1000 static void ath_init_leds(struct ath_softc *sc)
1001 {
1002         char *trigger;
1003         int ret;
1004
1005         /* Configure gpio 1 for output */
1006         ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
1007                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1008         /* LED off, active low */
1009         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
1010
1011         trigger = ieee80211_get_radio_led_name(sc->hw);
1012         snprintf(sc->radio_led.name, sizeof(sc->radio_led.name),
1013                 "ath9k-%s:radio", wiphy_name(sc->hw->wiphy));
1014         ret = ath_register_led(sc, &sc->radio_led, trigger);
1015         sc->radio_led.led_type = ATH_LED_RADIO;
1016         if (ret)
1017                 goto fail;
1018
1019         trigger = ieee80211_get_assoc_led_name(sc->hw);
1020         snprintf(sc->assoc_led.name, sizeof(sc->assoc_led.name),
1021                 "ath9k-%s:assoc", wiphy_name(sc->hw->wiphy));
1022         ret = ath_register_led(sc, &sc->assoc_led, trigger);
1023         sc->assoc_led.led_type = ATH_LED_ASSOC;
1024         if (ret)
1025                 goto fail;
1026
1027         trigger = ieee80211_get_tx_led_name(sc->hw);
1028         snprintf(sc->tx_led.name, sizeof(sc->tx_led.name),
1029                 "ath9k-%s:tx", wiphy_name(sc->hw->wiphy));
1030         ret = ath_register_led(sc, &sc->tx_led, trigger);
1031         sc->tx_led.led_type = ATH_LED_TX;
1032         if (ret)
1033                 goto fail;
1034
1035         trigger = ieee80211_get_rx_led_name(sc->hw);
1036         snprintf(sc->rx_led.name, sizeof(sc->rx_led.name),
1037                 "ath9k-%s:rx", wiphy_name(sc->hw->wiphy));
1038         ret = ath_register_led(sc, &sc->rx_led, trigger);
1039         sc->rx_led.led_type = ATH_LED_RX;
1040         if (ret)
1041                 goto fail;
1042
1043         return;
1044
1045 fail:
1046         ath_deinit_leds(sc);
1047 }
1048
1049 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
1050
1051 /*******************/
1052 /*      Rfkill     */
1053 /*******************/
1054
1055 static void ath_radio_enable(struct ath_softc *sc)
1056 {
1057         struct ath_hal *ah = sc->sc_ah;
1058         struct ieee80211_channel *channel = sc->hw->conf.channel;
1059         int r;
1060
1061         ath9k_ps_wakeup(sc);
1062         spin_lock_bh(&sc->sc_resetlock);
1063
1064         r = ath9k_hw_reset(ah, ah->ah_curchan, false);
1065
1066         if (r) {
1067                 DPRINTF(sc, ATH_DBG_FATAL,
1068                         "Unable to reset channel %u (%uMhz) ",
1069                         "reset status %u\n",
1070                         channel->center_freq, r);
1071         }
1072         spin_unlock_bh(&sc->sc_resetlock);
1073
1074         ath_update_txpow(sc);
1075         if (ath_startrecv(sc) != 0) {
1076                 DPRINTF(sc, ATH_DBG_FATAL,
1077                         "Unable to restart recv logic\n");
1078                 return;
1079         }
1080
1081         if (sc->sc_flags & SC_OP_BEACONS)
1082                 ath_beacon_config(sc, ATH_IF_ID_ANY);   /* restart beacons */
1083
1084         /* Re-Enable  interrupts */
1085         ath9k_hw_set_interrupts(ah, sc->sc_imask);
1086
1087         /* Enable LED */
1088         ath9k_hw_cfg_output(ah, ATH_LED_PIN,
1089                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1090         ath9k_hw_set_gpio(ah, ATH_LED_PIN, 0);
1091
1092         ieee80211_wake_queues(sc->hw);
1093         ath9k_ps_restore(sc);
1094 }
1095
1096 static void ath_radio_disable(struct ath_softc *sc)
1097 {
1098         struct ath_hal *ah = sc->sc_ah;
1099         struct ieee80211_channel *channel = sc->hw->conf.channel;
1100         int r;
1101
1102         ath9k_ps_wakeup(sc);
1103         ieee80211_stop_queues(sc->hw);
1104
1105         /* Disable LED */
1106         ath9k_hw_set_gpio(ah, ATH_LED_PIN, 1);
1107         ath9k_hw_cfg_gpio_input(ah, ATH_LED_PIN);
1108
1109         /* Disable interrupts */
1110         ath9k_hw_set_interrupts(ah, 0);
1111
1112         ath_drain_all_txq(sc, false);   /* clear pending tx frames */
1113         ath_stoprecv(sc);               /* turn off frame recv */
1114         ath_flushrecv(sc);              /* flush recv queue */
1115
1116         spin_lock_bh(&sc->sc_resetlock);
1117         r = ath9k_hw_reset(ah, ah->ah_curchan, false);
1118         if (r) {
1119                 DPRINTF(sc, ATH_DBG_FATAL,
1120                         "Unable to reset channel %u (%uMhz) "
1121                         "reset status %u\n",
1122                         channel->center_freq, r);
1123         }
1124         spin_unlock_bh(&sc->sc_resetlock);
1125
1126         ath9k_hw_phy_disable(ah);
1127         ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP);
1128         ath9k_ps_restore(sc);
1129 }
1130
1131 static bool ath_is_rfkill_set(struct ath_softc *sc)
1132 {
1133         struct ath_hal *ah = sc->sc_ah;
1134
1135         return ath9k_hw_gpio_get(ah, ah->ah_rfkill_gpio) ==
1136                                   ah->ah_rfkill_polarity;
1137 }
1138
1139 /* h/w rfkill poll function */
1140 static void ath_rfkill_poll(struct work_struct *work)
1141 {
1142         struct ath_softc *sc = container_of(work, struct ath_softc,
1143                                             rf_kill.rfkill_poll.work);
1144         bool radio_on;
1145
1146         if (sc->sc_flags & SC_OP_INVALID)
1147                 return;
1148
1149         radio_on = !ath_is_rfkill_set(sc);
1150
1151         /*
1152          * enable/disable radio only when there is a
1153          * state change in RF switch
1154          */
1155         if (radio_on == !!(sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED)) {
1156                 enum rfkill_state state;
1157
1158                 if (sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED) {
1159                         state = radio_on ? RFKILL_STATE_SOFT_BLOCKED
1160                                 : RFKILL_STATE_HARD_BLOCKED;
1161                 } else if (radio_on) {
1162                         ath_radio_enable(sc);
1163                         state = RFKILL_STATE_UNBLOCKED;
1164                 } else {
1165                         ath_radio_disable(sc);
1166                         state = RFKILL_STATE_HARD_BLOCKED;
1167                 }
1168
1169                 if (state == RFKILL_STATE_HARD_BLOCKED)
1170                         sc->sc_flags |= SC_OP_RFKILL_HW_BLOCKED;
1171                 else
1172                         sc->sc_flags &= ~SC_OP_RFKILL_HW_BLOCKED;
1173
1174                 rfkill_force_state(sc->rf_kill.rfkill, state);
1175         }
1176
1177         queue_delayed_work(sc->hw->workqueue, &sc->rf_kill.rfkill_poll,
1178                            msecs_to_jiffies(ATH_RFKILL_POLL_INTERVAL));
1179 }
1180
1181 /* s/w rfkill handler */
1182 static int ath_sw_toggle_radio(void *data, enum rfkill_state state)
1183 {
1184         struct ath_softc *sc = data;
1185
1186         switch (state) {
1187         case RFKILL_STATE_SOFT_BLOCKED:
1188                 if (!(sc->sc_flags & (SC_OP_RFKILL_HW_BLOCKED |
1189                     SC_OP_RFKILL_SW_BLOCKED)))
1190                         ath_radio_disable(sc);
1191                 sc->sc_flags |= SC_OP_RFKILL_SW_BLOCKED;
1192                 return 0;
1193         case RFKILL_STATE_UNBLOCKED:
1194                 if ((sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED)) {
1195                         sc->sc_flags &= ~SC_OP_RFKILL_SW_BLOCKED;
1196                         if (sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED) {
1197                                 DPRINTF(sc, ATH_DBG_FATAL, "Can't turn on the"
1198                                         "radio as it is disabled by h/w\n");
1199                                 return -EPERM;
1200                         }
1201                         ath_radio_enable(sc);
1202                 }
1203                 return 0;
1204         default:
1205                 return -EINVAL;
1206         }
1207 }
1208
1209 /* Init s/w rfkill */
1210 static int ath_init_sw_rfkill(struct ath_softc *sc)
1211 {
1212         sc->rf_kill.rfkill = rfkill_allocate(wiphy_dev(sc->hw->wiphy),
1213                                              RFKILL_TYPE_WLAN);
1214         if (!sc->rf_kill.rfkill) {
1215                 DPRINTF(sc, ATH_DBG_FATAL, "Failed to allocate rfkill\n");
1216                 return -ENOMEM;
1217         }
1218
1219         snprintf(sc->rf_kill.rfkill_name, sizeof(sc->rf_kill.rfkill_name),
1220                 "ath9k-%s:rfkill", wiphy_name(sc->hw->wiphy));
1221         sc->rf_kill.rfkill->name = sc->rf_kill.rfkill_name;
1222         sc->rf_kill.rfkill->data = sc;
1223         sc->rf_kill.rfkill->toggle_radio = ath_sw_toggle_radio;
1224         sc->rf_kill.rfkill->state = RFKILL_STATE_UNBLOCKED;
1225         sc->rf_kill.rfkill->user_claim_unsupported = 1;
1226
1227         return 0;
1228 }
1229
1230 /* Deinitialize rfkill */
1231 static void ath_deinit_rfkill(struct ath_softc *sc)
1232 {
1233         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1234                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
1235
1236         if (sc->sc_flags & SC_OP_RFKILL_REGISTERED) {
1237                 rfkill_unregister(sc->rf_kill.rfkill);
1238                 sc->sc_flags &= ~SC_OP_RFKILL_REGISTERED;
1239                 sc->rf_kill.rfkill = NULL;
1240         }
1241 }
1242
1243 static int ath_start_rfkill_poll(struct ath_softc *sc)
1244 {
1245         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1246                 queue_delayed_work(sc->hw->workqueue,
1247                                    &sc->rf_kill.rfkill_poll, 0);
1248
1249         if (!(sc->sc_flags & SC_OP_RFKILL_REGISTERED)) {
1250                 if (rfkill_register(sc->rf_kill.rfkill)) {
1251                         DPRINTF(sc, ATH_DBG_FATAL,
1252                                 "Unable to register rfkill\n");
1253                         rfkill_free(sc->rf_kill.rfkill);
1254
1255                         /* Deinitialize the device */
1256                         ath_cleanup(sc);
1257                         return -EIO;
1258                 } else {
1259                         sc->sc_flags |= SC_OP_RFKILL_REGISTERED;
1260                 }
1261         }
1262
1263         return 0;
1264 }
1265 #endif /* CONFIG_RFKILL */
1266
1267 void ath_cleanup(struct ath_softc *sc)
1268 {
1269         ath_detach(sc);
1270         free_irq(sc->irq, sc);
1271         ath_bus_cleanup(sc);
1272         ieee80211_free_hw(sc->hw);
1273 }
1274
1275 void ath_detach(struct ath_softc *sc)
1276 {
1277         struct ieee80211_hw *hw = sc->hw;
1278         int i = 0;
1279
1280         ath9k_ps_wakeup(sc);
1281
1282         DPRINTF(sc, ATH_DBG_CONFIG, "Detach ATH hw\n");
1283
1284 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
1285         ath_deinit_rfkill(sc);
1286 #endif
1287         ath_deinit_leds(sc);
1288
1289         ieee80211_unregister_hw(hw);
1290         ath_rx_cleanup(sc);
1291         ath_tx_cleanup(sc);
1292
1293         tasklet_kill(&sc->intr_tq);
1294         tasklet_kill(&sc->bcon_tasklet);
1295
1296         if (!(sc->sc_flags & SC_OP_INVALID))
1297                 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
1298
1299         /* cleanup tx queues */
1300         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
1301                 if (ATH_TXQ_SETUP(sc, i))
1302                         ath_tx_cleanupq(sc, &sc->tx.txq[i]);
1303
1304         ath9k_hw_detach(sc->sc_ah);
1305         ath9k_exit_debug(sc);
1306         ath9k_ps_restore(sc);
1307 }
1308
1309 static int ath_init(u16 devid, struct ath_softc *sc)
1310 {
1311         struct ath_hal *ah = NULL;
1312         int status;
1313         int error = 0, i;
1314         int csz = 0;
1315
1316         /* XXX: hardware will not be ready until ath_open() being called */
1317         sc->sc_flags |= SC_OP_INVALID;
1318
1319         if (ath9k_init_debug(sc) < 0)
1320                 printk(KERN_ERR "Unable to create debugfs files\n");
1321
1322         spin_lock_init(&sc->sc_resetlock);
1323         mutex_init(&sc->mutex);
1324         tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);
1325         tasklet_init(&sc->bcon_tasklet, ath9k_beacon_tasklet,
1326                      (unsigned long)sc);
1327
1328         /*
1329          * Cache line size is used to size and align various
1330          * structures used to communicate with the hardware.
1331          */
1332         ath_read_cachesize(sc, &csz);
1333         /* XXX assert csz is non-zero */
1334         sc->sc_cachelsz = csz << 2;     /* convert to bytes */
1335
1336         ah = ath9k_hw_attach(devid, sc, sc->mem, &status);
1337         if (ah == NULL) {
1338                 DPRINTF(sc, ATH_DBG_FATAL,
1339                         "Unable to attach hardware; HAL status %d\n", status);
1340                 error = -ENXIO;
1341                 goto bad;
1342         }
1343         sc->sc_ah = ah;
1344
1345         /* Get the hardware key cache size. */
1346         sc->sc_keymax = ah->ah_caps.keycache_size;
1347         if (sc->sc_keymax > ATH_KEYMAX) {
1348                 DPRINTF(sc, ATH_DBG_KEYCACHE,
1349                         "Warning, using only %u entries in %u key cache\n",
1350                         ATH_KEYMAX, sc->sc_keymax);
1351                 sc->sc_keymax = ATH_KEYMAX;
1352         }
1353
1354         /*
1355          * Reset the key cache since some parts do not
1356          * reset the contents on initial power up.
1357          */
1358         for (i = 0; i < sc->sc_keymax; i++)
1359                 ath9k_hw_keyreset(ah, (u16) i);
1360
1361         if (ath9k_regd_init(sc->sc_ah))
1362                 goto bad;
1363
1364         /* default to MONITOR mode */
1365         sc->sc_ah->ah_opmode = NL80211_IFTYPE_MONITOR;
1366
1367         /* Setup rate tables */
1368
1369         ath_rate_attach(sc);
1370         ath_setup_rates(sc, IEEE80211_BAND_2GHZ);
1371         ath_setup_rates(sc, IEEE80211_BAND_5GHZ);
1372
1373         /*
1374          * Allocate hardware transmit queues: one queue for
1375          * beacon frames and one data queue for each QoS
1376          * priority.  Note that the hal handles reseting
1377          * these queues at the needed time.
1378          */
1379         sc->beacon.beaconq = ath_beaconq_setup(ah);
1380         if (sc->beacon.beaconq == -1) {
1381                 DPRINTF(sc, ATH_DBG_FATAL,
1382                         "Unable to setup a beacon xmit queue\n");
1383                 error = -EIO;
1384                 goto bad2;
1385         }
1386         sc->beacon.cabq = ath_txq_setup(sc, ATH9K_TX_QUEUE_CAB, 0);
1387         if (sc->beacon.cabq == NULL) {
1388                 DPRINTF(sc, ATH_DBG_FATAL,
1389                         "Unable to setup CAB xmit queue\n");
1390                 error = -EIO;
1391                 goto bad2;
1392         }
1393
1394         sc->sc_config.cabqReadytime = ATH_CABQ_READY_TIME;
1395         ath_cabq_update(sc);
1396
1397         for (i = 0; i < ARRAY_SIZE(sc->tx.hwq_map); i++)
1398                 sc->tx.hwq_map[i] = -1;
1399
1400         /* Setup data queues */
1401         /* NB: ensure BK queue is the lowest priority h/w queue */
1402         if (!ath_tx_setup(sc, ATH9K_WME_AC_BK)) {
1403                 DPRINTF(sc, ATH_DBG_FATAL,
1404                         "Unable to setup xmit queue for BK traffic\n");
1405                 error = -EIO;
1406                 goto bad2;
1407         }
1408
1409         if (!ath_tx_setup(sc, ATH9K_WME_AC_BE)) {
1410                 DPRINTF(sc, ATH_DBG_FATAL,
1411                         "Unable to setup xmit queue for BE traffic\n");
1412                 error = -EIO;
1413                 goto bad2;
1414         }
1415         if (!ath_tx_setup(sc, ATH9K_WME_AC_VI)) {
1416                 DPRINTF(sc, ATH_DBG_FATAL,
1417                         "Unable to setup xmit queue for VI traffic\n");
1418                 error = -EIO;
1419                 goto bad2;
1420         }
1421         if (!ath_tx_setup(sc, ATH9K_WME_AC_VO)) {
1422                 DPRINTF(sc, ATH_DBG_FATAL,
1423                         "Unable to setup xmit queue for VO traffic\n");
1424                 error = -EIO;
1425                 goto bad2;
1426         }
1427
1428         /* Initializes the noise floor to a reasonable default value.
1429          * Later on this will be updated during ANI processing. */
1430
1431         sc->sc_ani.sc_noise_floor = ATH_DEFAULT_NOISE_FLOOR;
1432         setup_timer(&sc->sc_ani.timer, ath_ani_calibrate, (unsigned long)sc);
1433
1434         if (ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
1435                                    ATH9K_CIPHER_TKIP, NULL)) {
1436                 /*
1437                  * Whether we should enable h/w TKIP MIC.
1438                  * XXX: if we don't support WME TKIP MIC, then we wouldn't
1439                  * report WMM capable, so it's always safe to turn on
1440                  * TKIP MIC in this case.
1441                  */
1442                 ath9k_hw_setcapability(sc->sc_ah, ATH9K_CAP_TKIP_MIC,
1443                                        0, 1, NULL);
1444         }
1445
1446         /*
1447          * Check whether the separate key cache entries
1448          * are required to handle both tx+rx MIC keys.
1449          * With split mic keys the number of stations is limited
1450          * to 27 otherwise 59.
1451          */
1452         if (ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
1453                                    ATH9K_CIPHER_TKIP, NULL)
1454             && ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
1455                                       ATH9K_CIPHER_MIC, NULL)
1456             && ath9k_hw_getcapability(ah, ATH9K_CAP_TKIP_SPLIT,
1457                                       0, NULL))
1458                 sc->sc_splitmic = 1;
1459
1460         /* turn on mcast key search if possible */
1461         if (!ath9k_hw_getcapability(ah, ATH9K_CAP_MCAST_KEYSRCH, 0, NULL))
1462                 (void)ath9k_hw_setcapability(ah, ATH9K_CAP_MCAST_KEYSRCH, 1,
1463                                              1, NULL);
1464
1465         sc->sc_config.txpowlimit = ATH_TXPOWER_MAX;
1466         sc->sc_config.txpowlimit_override = 0;
1467
1468         /* 11n Capabilities */
1469         if (ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) {
1470                 sc->sc_flags |= SC_OP_TXAGGR;
1471                 sc->sc_flags |= SC_OP_RXAGGR;
1472         }
1473
1474         sc->sc_tx_chainmask = ah->ah_caps.tx_chainmask;
1475         sc->sc_rx_chainmask = ah->ah_caps.rx_chainmask;
1476
1477         ath9k_hw_setcapability(ah, ATH9K_CAP_DIVERSITY, 1, true, NULL);
1478         sc->rx.defant = ath9k_hw_getdefantenna(ah);
1479
1480         ath9k_hw_getmac(ah, sc->sc_myaddr);
1481         if (ah->ah_caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK) {
1482                 ath9k_hw_getbssidmask(ah, sc->sc_bssidmask);
1483                 ATH_SET_VAP_BSSID_MASK(sc->sc_bssidmask);
1484                 ath9k_hw_setbssidmask(ah, sc->sc_bssidmask);
1485         }
1486
1487         sc->beacon.slottime = ATH9K_SLOT_TIME_9;        /* default to short slot time */
1488
1489         /* initialize beacon slots */
1490         for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++)
1491                 sc->beacon.bslot[i] = ATH_IF_ID_ANY;
1492
1493         /* save MISC configurations */
1494         sc->sc_config.swBeaconProcess = 1;
1495
1496         /* setup channels and rates */
1497
1498         sc->sbands[IEEE80211_BAND_2GHZ].channels = ath9k_2ghz_chantable;
1499         sc->sbands[IEEE80211_BAND_2GHZ].bitrates =
1500                 sc->rates[IEEE80211_BAND_2GHZ];
1501         sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
1502         sc->sbands[IEEE80211_BAND_2GHZ].n_channels =
1503                 ARRAY_SIZE(ath9k_2ghz_chantable);
1504
1505         if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes)) {
1506                 sc->sbands[IEEE80211_BAND_5GHZ].channels = ath9k_5ghz_chantable;
1507                 sc->sbands[IEEE80211_BAND_5GHZ].bitrates =
1508                         sc->rates[IEEE80211_BAND_5GHZ];
1509                 sc->sbands[IEEE80211_BAND_5GHZ].band = IEEE80211_BAND_5GHZ;
1510                 sc->sbands[IEEE80211_BAND_5GHZ].n_channels =
1511                         ARRAY_SIZE(ath9k_5ghz_chantable);
1512         }
1513
1514         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_BT_COEX)
1515                 ath9k_hw_btcoex_enable(sc->sc_ah);
1516
1517         return 0;
1518 bad2:
1519         /* cleanup tx queues */
1520         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
1521                 if (ATH_TXQ_SETUP(sc, i))
1522                         ath_tx_cleanupq(sc, &sc->tx.txq[i]);
1523 bad:
1524         if (ah)
1525                 ath9k_hw_detach(ah);
1526
1527         return error;
1528 }
1529
1530 int ath_attach(u16 devid, struct ath_softc *sc)
1531 {
1532         struct ieee80211_hw *hw = sc->hw;
1533         int error = 0;
1534
1535         DPRINTF(sc, ATH_DBG_CONFIG, "Attach ATH hw\n");
1536
1537         error = ath_init(devid, sc);
1538         if (error != 0)
1539                 return error;
1540
1541         /* get mac address from hardware and set in mac80211 */
1542
1543         SET_IEEE80211_PERM_ADDR(hw, sc->sc_myaddr);
1544
1545         hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
1546                 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
1547                 IEEE80211_HW_SIGNAL_DBM |
1548                 IEEE80211_HW_AMPDU_AGGREGATION |
1549                 IEEE80211_HW_SUPPORTS_PS |
1550                 IEEE80211_HW_PS_NULLFUNC_STACK;
1551
1552         if (AR_SREV_9160_10_OR_LATER(sc->sc_ah))
1553                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
1554
1555         hw->wiphy->interface_modes =
1556                 BIT(NL80211_IFTYPE_AP) |
1557                 BIT(NL80211_IFTYPE_STATION) |
1558                 BIT(NL80211_IFTYPE_ADHOC);
1559
1560         hw->wiphy->reg_notifier = ath9k_reg_notifier;
1561         hw->wiphy->strict_regulatory = true;
1562
1563         hw->queues = 4;
1564         hw->max_rates = 4;
1565         hw->max_rate_tries = ATH_11N_TXMAXTRY;
1566         hw->sta_data_size = sizeof(struct ath_node);
1567         hw->vif_data_size = sizeof(struct ath_vap);
1568
1569         hw->rate_control_algorithm = "ath9k_rate_control";
1570
1571         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) {
1572                 setup_ht_cap(sc, &sc->sbands[IEEE80211_BAND_2GHZ].ht_cap);
1573                 if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes))
1574                         setup_ht_cap(sc, &sc->sbands[IEEE80211_BAND_5GHZ].ht_cap);
1575         }
1576
1577         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &sc->sbands[IEEE80211_BAND_2GHZ];
1578         if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes))
1579                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1580                         &sc->sbands[IEEE80211_BAND_5GHZ];
1581
1582         /* initialize tx/rx engine */
1583         error = ath_tx_init(sc, ATH_TXBUF);
1584         if (error != 0)
1585                 goto detach;
1586
1587         error = ath_rx_init(sc, ATH_RXBUF);
1588         if (error != 0)
1589                 goto detach;
1590
1591 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
1592         /* Initialze h/w Rfkill */
1593         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1594                 INIT_DELAYED_WORK(&sc->rf_kill.rfkill_poll, ath_rfkill_poll);
1595
1596         /* Initialize s/w rfkill */
1597         if (ath_init_sw_rfkill(sc))
1598                 goto detach;
1599 #endif
1600
1601         if (ath9k_is_world_regd(sc->sc_ah)) {
1602                 /* Anything applied here (prior to wiphy registratoin) gets
1603                  * saved on the wiphy orig_* parameters */
1604                 const struct ieee80211_regdomain *regd =
1605                         ath9k_world_regdomain(sc->sc_ah);
1606                 hw->wiphy->custom_regulatory = true;
1607                 hw->wiphy->strict_regulatory = false;
1608                 wiphy_apply_custom_regulatory(sc->hw->wiphy, regd);
1609                 ath9k_reg_apply_radar_flags(hw->wiphy);
1610                 ath9k_reg_apply_world_flags(hw->wiphy, REGDOM_SET_BY_INIT);
1611         } else {
1612                 /* This gets applied in the case of the absense of CRDA,
1613                  * its our own custom world regulatory domain, similar to
1614                  * cfg80211's but we enable passive scanning */
1615                 const struct ieee80211_regdomain *regd =
1616                         ath9k_default_world_regdomain();
1617                 wiphy_apply_custom_regulatory(sc->hw->wiphy, regd);
1618                 ath9k_reg_apply_radar_flags(hw->wiphy);
1619                 ath9k_reg_apply_world_flags(hw->wiphy, REGDOM_SET_BY_INIT);
1620         }
1621
1622         error = ieee80211_register_hw(hw);
1623
1624         if (!ath9k_is_world_regd(sc->sc_ah))
1625                 regulatory_hint(hw->wiphy, sc->sc_ah->alpha2);
1626
1627         /* Initialize LED control */
1628         ath_init_leds(sc);
1629
1630
1631         return 0;
1632 detach:
1633         ath_detach(sc);
1634         return error;
1635 }
1636
1637 int ath_reset(struct ath_softc *sc, bool retry_tx)
1638 {
1639         struct ath_hal *ah = sc->sc_ah;
1640         struct ieee80211_hw *hw = sc->hw;
1641         int r;
1642
1643         ath9k_hw_set_interrupts(ah, 0);
1644         ath_drain_all_txq(sc, retry_tx);
1645         ath_stoprecv(sc);
1646         ath_flushrecv(sc);
1647
1648         spin_lock_bh(&sc->sc_resetlock);
1649         r = ath9k_hw_reset(ah, sc->sc_ah->ah_curchan, false);
1650         if (r)
1651                 DPRINTF(sc, ATH_DBG_FATAL,
1652                         "Unable to reset hardware; reset status %u\n", r);
1653         spin_unlock_bh(&sc->sc_resetlock);
1654
1655         if (ath_startrecv(sc) != 0)
1656                 DPRINTF(sc, ATH_DBG_FATAL, "Unable to start recv logic\n");
1657
1658         /*
1659          * We may be doing a reset in response to a request
1660          * that changes the channel so update any state that
1661          * might change as a result.
1662          */
1663         ath_cache_conf_rate(sc, &hw->conf);
1664
1665         ath_update_txpow(sc);
1666
1667         if (sc->sc_flags & SC_OP_BEACONS)
1668                 ath_beacon_config(sc, ATH_IF_ID_ANY);   /* restart beacons */
1669
1670         ath9k_hw_set_interrupts(ah, sc->sc_imask);
1671
1672         if (retry_tx) {
1673                 int i;
1674                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1675                         if (ATH_TXQ_SETUP(sc, i)) {
1676                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
1677                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
1678                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
1679                         }
1680                 }
1681         }
1682
1683         return r;
1684 }
1685
1686 /*
1687  *  This function will allocate both the DMA descriptor structure, and the
1688  *  buffers it contains.  These are used to contain the descriptors used
1689  *  by the system.
1690 */
1691 int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
1692                       struct list_head *head, const char *name,
1693                       int nbuf, int ndesc)
1694 {
1695 #define DS2PHYS(_dd, _ds)                                               \
1696         ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
1697 #define ATH_DESC_4KB_BOUND_CHECK(_daddr) ((((_daddr) & 0xFFF) > 0xF7F) ? 1 : 0)
1698 #define ATH_DESC_4KB_BOUND_NUM_SKIPPED(_len) ((_len) / 4096)
1699
1700         struct ath_desc *ds;
1701         struct ath_buf *bf;
1702         int i, bsize, error;
1703
1704         DPRINTF(sc, ATH_DBG_CONFIG, "%s DMA: %u buffers %u desc/buf\n",
1705                 name, nbuf, ndesc);
1706
1707         /* ath_desc must be a multiple of DWORDs */
1708         if ((sizeof(struct ath_desc) % 4) != 0) {
1709                 DPRINTF(sc, ATH_DBG_FATAL, "ath_desc not DWORD aligned\n");
1710                 ASSERT((sizeof(struct ath_desc) % 4) == 0);
1711                 error = -ENOMEM;
1712                 goto fail;
1713         }
1714
1715         dd->dd_name = name;
1716         dd->dd_desc_len = sizeof(struct ath_desc) * nbuf * ndesc;
1717
1718         /*
1719          * Need additional DMA memory because we can't use
1720          * descriptors that cross the 4K page boundary. Assume
1721          * one skipped descriptor per 4K page.
1722          */
1723         if (!(sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_4KB_SPLITTRANS)) {
1724                 u32 ndesc_skipped =
1725                         ATH_DESC_4KB_BOUND_NUM_SKIPPED(dd->dd_desc_len);
1726                 u32 dma_len;
1727
1728                 while (ndesc_skipped) {
1729                         dma_len = ndesc_skipped * sizeof(struct ath_desc);
1730                         dd->dd_desc_len += dma_len;
1731
1732                         ndesc_skipped = ATH_DESC_4KB_BOUND_NUM_SKIPPED(dma_len);
1733                 };
1734         }
1735
1736         /* allocate descriptors */
1737         dd->dd_desc = dma_alloc_coherent(sc->dev, dd->dd_desc_len,
1738                                          &dd->dd_desc_paddr, GFP_ATOMIC);
1739         if (dd->dd_desc == NULL) {
1740                 error = -ENOMEM;
1741                 goto fail;
1742         }
1743         ds = dd->dd_desc;
1744         DPRINTF(sc, ATH_DBG_CONFIG, "%s DMA map: %p (%u) -> %llx (%u)\n",
1745                 dd->dd_name, ds, (u32) dd->dd_desc_len,
1746                 ito64(dd->dd_desc_paddr), /*XXX*/(u32) dd->dd_desc_len);
1747
1748         /* allocate buffers */
1749         bsize = sizeof(struct ath_buf) * nbuf;
1750         bf = kmalloc(bsize, GFP_KERNEL);
1751         if (bf == NULL) {
1752                 error = -ENOMEM;
1753                 goto fail2;
1754         }
1755         memset(bf, 0, bsize);
1756         dd->dd_bufptr = bf;
1757
1758         INIT_LIST_HEAD(head);
1759         for (i = 0; i < nbuf; i++, bf++, ds += ndesc) {
1760                 bf->bf_desc = ds;
1761                 bf->bf_daddr = DS2PHYS(dd, ds);
1762
1763                 if (!(sc->sc_ah->ah_caps.hw_caps &
1764                       ATH9K_HW_CAP_4KB_SPLITTRANS)) {
1765                         /*
1766                          * Skip descriptor addresses which can cause 4KB
1767                          * boundary crossing (addr + length) with a 32 dword
1768                          * descriptor fetch.
1769                          */
1770                         while (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr)) {
1771                                 ASSERT((caddr_t) bf->bf_desc <
1772                                        ((caddr_t) dd->dd_desc +
1773                                         dd->dd_desc_len));
1774
1775                                 ds += ndesc;
1776                                 bf->bf_desc = ds;
1777                                 bf->bf_daddr = DS2PHYS(dd, ds);
1778                         }
1779                 }
1780                 list_add_tail(&bf->list, head);
1781         }
1782         return 0;
1783 fail2:
1784         dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
1785                           dd->dd_desc_paddr);
1786 fail:
1787         memset(dd, 0, sizeof(*dd));
1788         return error;
1789 #undef ATH_DESC_4KB_BOUND_CHECK
1790 #undef ATH_DESC_4KB_BOUND_NUM_SKIPPED
1791 #undef DS2PHYS
1792 }
1793
1794 void ath_descdma_cleanup(struct ath_softc *sc,
1795                          struct ath_descdma *dd,
1796                          struct list_head *head)
1797 {
1798         dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
1799                           dd->dd_desc_paddr);
1800
1801         INIT_LIST_HEAD(head);
1802         kfree(dd->dd_bufptr);
1803         memset(dd, 0, sizeof(*dd));
1804 }
1805
1806 int ath_get_hal_qnum(u16 queue, struct ath_softc *sc)
1807 {
1808         int qnum;
1809
1810         switch (queue) {
1811         case 0:
1812                 qnum = sc->tx.hwq_map[ATH9K_WME_AC_VO];
1813                 break;
1814         case 1:
1815                 qnum = sc->tx.hwq_map[ATH9K_WME_AC_VI];
1816                 break;
1817         case 2:
1818                 qnum = sc->tx.hwq_map[ATH9K_WME_AC_BE];
1819                 break;
1820         case 3:
1821                 qnum = sc->tx.hwq_map[ATH9K_WME_AC_BK];
1822                 break;
1823         default:
1824                 qnum = sc->tx.hwq_map[ATH9K_WME_AC_BE];
1825                 break;
1826         }
1827
1828         return qnum;
1829 }
1830
1831 int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc)
1832 {
1833         int qnum;
1834
1835         switch (queue) {
1836         case ATH9K_WME_AC_VO:
1837                 qnum = 0;
1838                 break;
1839         case ATH9K_WME_AC_VI:
1840                 qnum = 1;
1841                 break;
1842         case ATH9K_WME_AC_BE:
1843                 qnum = 2;
1844                 break;
1845         case ATH9K_WME_AC_BK:
1846                 qnum = 3;
1847                 break;
1848         default:
1849                 qnum = -1;
1850                 break;
1851         }
1852
1853         return qnum;
1854 }
1855
1856 /* XXX: Remove me once we don't depend on ath9k_channel for all
1857  * this redundant data */
1858 static void ath9k_update_ichannel(struct ath_softc *sc,
1859                           struct ath9k_channel *ichan)
1860 {
1861         struct ieee80211_hw *hw = sc->hw;
1862         struct ieee80211_channel *chan = hw->conf.channel;
1863         struct ieee80211_conf *conf = &hw->conf;
1864
1865         ichan->channel = chan->center_freq;
1866         ichan->chan = chan;
1867
1868         if (chan->band == IEEE80211_BAND_2GHZ) {
1869                 ichan->chanmode = CHANNEL_G;
1870                 ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM;
1871         } else {
1872                 ichan->chanmode = CHANNEL_A;
1873                 ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
1874         }
1875
1876         sc->tx_chan_width = ATH9K_HT_MACMODE_20;
1877
1878         if (conf_is_ht(conf)) {
1879                 if (conf_is_ht40(conf))
1880                         sc->tx_chan_width = ATH9K_HT_MACMODE_2040;
1881
1882                 ichan->chanmode = ath_get_extchanmode(sc, chan,
1883                                             conf->channel_type);
1884         }
1885 }
1886
1887 /**********************/
1888 /* mac80211 callbacks */
1889 /**********************/
1890
1891 static int ath9k_start(struct ieee80211_hw *hw)
1892 {
1893         struct ath_softc *sc = hw->priv;
1894         struct ieee80211_channel *curchan = hw->conf.channel;
1895         struct ath9k_channel *init_channel;
1896         int r, pos;
1897
1898         DPRINTF(sc, ATH_DBG_CONFIG, "Starting driver with "
1899                 "initial channel: %d MHz\n", curchan->center_freq);
1900
1901         /* setup initial channel */
1902
1903         pos = curchan->hw_value;
1904
1905         init_channel = &sc->sc_ah->ah_channels[pos];
1906         ath9k_update_ichannel(sc, init_channel);
1907
1908         /* Reset SERDES registers */
1909         ath9k_hw_configpcipowersave(sc->sc_ah, 0);
1910
1911         /*
1912          * The basic interface to setting the hardware in a good
1913          * state is ``reset''.  On return the hardware is known to
1914          * be powered up and with interrupts disabled.  This must
1915          * be followed by initialization of the appropriate bits
1916          * and then setup of the interrupt mask.
1917          */
1918         spin_lock_bh(&sc->sc_resetlock);
1919         r = ath9k_hw_reset(sc->sc_ah, init_channel, false);
1920         if (r) {
1921                 DPRINTF(sc, ATH_DBG_FATAL,
1922                         "Unable to reset hardware; reset status %u "
1923                         "(freq %u MHz)\n", r,
1924                         curchan->center_freq);
1925                 spin_unlock_bh(&sc->sc_resetlock);
1926                 return r;
1927         }
1928         spin_unlock_bh(&sc->sc_resetlock);
1929
1930         /*
1931          * This is needed only to setup initial state
1932          * but it's best done after a reset.
1933          */
1934         ath_update_txpow(sc);
1935
1936         /*
1937          * Setup the hardware after reset:
1938          * The receive engine is set going.
1939          * Frame transmit is handled entirely
1940          * in the frame output path; there's nothing to do
1941          * here except setup the interrupt mask.
1942          */
1943         if (ath_startrecv(sc) != 0) {
1944                 DPRINTF(sc, ATH_DBG_FATAL,
1945                         "Unable to start recv logic\n");
1946                 return -EIO;
1947         }
1948
1949         /* Setup our intr mask. */
1950         sc->sc_imask = ATH9K_INT_RX | ATH9K_INT_TX
1951                 | ATH9K_INT_RXEOL | ATH9K_INT_RXORN
1952                 | ATH9K_INT_FATAL | ATH9K_INT_GLOBAL;
1953
1954         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_GTT)
1955                 sc->sc_imask |= ATH9K_INT_GTT;
1956
1957         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
1958                 sc->sc_imask |= ATH9K_INT_CST;
1959
1960         /*
1961          * Enable MIB interrupts when there are hardware phy counters.
1962          * Note we only do this (at the moment) for station mode.
1963          */
1964         if (ath9k_hw_phycounters(sc->sc_ah) &&
1965             ((sc->sc_ah->ah_opmode == NL80211_IFTYPE_STATION) ||
1966              (sc->sc_ah->ah_opmode == NL80211_IFTYPE_ADHOC)))
1967                 sc->sc_imask |= ATH9K_INT_MIB;
1968         /*
1969          * Some hardware processes the TIM IE and fires an
1970          * interrupt when the TIM bit is set.  For hardware
1971          * that does, if not overridden by configuration,
1972          * enable the TIM interrupt when operating as station.
1973          */
1974         if ((sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_ENHANCEDPM) &&
1975             (sc->sc_ah->ah_opmode == NL80211_IFTYPE_STATION) &&
1976             !sc->sc_config.swBeaconProcess)
1977                 sc->sc_imask |= ATH9K_INT_TIM;
1978
1979         ath_cache_conf_rate(sc, &hw->conf);
1980
1981         sc->sc_flags &= ~SC_OP_INVALID;
1982
1983         /* Disable BMISS interrupt when we're not associated */
1984         sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1985         ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_imask);
1986
1987         ieee80211_wake_queues(sc->hw);
1988
1989 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
1990         r = ath_start_rfkill_poll(sc);
1991 #endif
1992         return r;
1993 }
1994
1995 static int ath9k_tx(struct ieee80211_hw *hw,
1996                     struct sk_buff *skb)
1997 {
1998         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1999         struct ath_softc *sc = hw->priv;
2000         struct ath_tx_control txctl;
2001         int hdrlen, padsize;
2002
2003         memset(&txctl, 0, sizeof(struct ath_tx_control));
2004
2005         /*
2006          * As a temporary workaround, assign seq# here; this will likely need
2007          * to be cleaned up to work better with Beacon transmission and virtual
2008          * BSSes.
2009          */
2010         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
2011                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2012                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
2013                         sc->tx.seq_no += 0x10;
2014                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
2015                 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
2016         }
2017
2018         /* Add the padding after the header if this is not already done */
2019         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
2020         if (hdrlen & 3) {
2021                 padsize = hdrlen % 4;
2022                 if (skb_headroom(skb) < padsize)
2023                         return -1;
2024                 skb_push(skb, padsize);
2025                 memmove(skb->data, skb->data + padsize, hdrlen);
2026         }
2027
2028         /* Check if a tx queue is available */
2029
2030         txctl.txq = ath_test_get_txq(sc, skb);
2031         if (!txctl.txq)
2032                 goto exit;
2033
2034         DPRINTF(sc, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
2035
2036         if (ath_tx_start(sc, skb, &txctl) != 0) {
2037                 DPRINTF(sc, ATH_DBG_XMIT, "TX failed\n");
2038                 goto exit;
2039         }
2040
2041         return 0;
2042 exit:
2043         dev_kfree_skb_any(skb);
2044         return 0;
2045 }
2046
2047 static void ath9k_stop(struct ieee80211_hw *hw)
2048 {
2049         struct ath_softc *sc = hw->priv;
2050
2051         if (sc->sc_flags & SC_OP_INVALID) {
2052                 DPRINTF(sc, ATH_DBG_ANY, "Device not present\n");
2053                 return;
2054         }
2055
2056         DPRINTF(sc, ATH_DBG_CONFIG, "Cleaning up\n");
2057
2058         ieee80211_stop_queues(sc->hw);
2059
2060         /* make sure h/w will not generate any interrupt
2061          * before setting the invalid flag. */
2062         ath9k_hw_set_interrupts(sc->sc_ah, 0);
2063
2064         if (!(sc->sc_flags & SC_OP_INVALID)) {
2065                 ath_drain_all_txq(sc, false);
2066                 ath_stoprecv(sc);
2067                 ath9k_hw_phy_disable(sc->sc_ah);
2068         } else
2069                 sc->rx.rxlink = NULL;
2070
2071 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
2072         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
2073                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
2074 #endif
2075         /* disable HAL and put h/w to sleep */
2076         ath9k_hw_disable(sc->sc_ah);
2077         ath9k_hw_configpcipowersave(sc->sc_ah, 1);
2078
2079         sc->sc_flags |= SC_OP_INVALID;
2080
2081         DPRINTF(sc, ATH_DBG_CONFIG, "Driver halt\n");
2082 }
2083
2084 static int ath9k_add_interface(struct ieee80211_hw *hw,
2085                                struct ieee80211_if_init_conf *conf)
2086 {
2087         struct ath_softc *sc = hw->priv;
2088         struct ath_vap *avp = (void *)conf->vif->drv_priv;
2089         enum nl80211_iftype ic_opmode = NL80211_IFTYPE_UNSPECIFIED;
2090
2091         /* Support only vap for now */
2092
2093         if (sc->sc_nvaps)
2094                 return -ENOBUFS;
2095
2096         switch (conf->type) {
2097         case NL80211_IFTYPE_STATION:
2098                 ic_opmode = NL80211_IFTYPE_STATION;
2099                 break;
2100         case NL80211_IFTYPE_ADHOC:
2101                 ic_opmode = NL80211_IFTYPE_ADHOC;
2102                 break;
2103         case NL80211_IFTYPE_AP:
2104                 ic_opmode = NL80211_IFTYPE_AP;
2105                 break;
2106         default:
2107                 DPRINTF(sc, ATH_DBG_FATAL,
2108                         "Interface type %d not yet supported\n", conf->type);
2109                 return -EOPNOTSUPP;
2110         }
2111
2112         DPRINTF(sc, ATH_DBG_CONFIG, "Attach a VAP of type: %d\n", ic_opmode);
2113
2114         /* Set the VAP opmode */
2115         avp->av_opmode = ic_opmode;
2116         avp->av_bslot = -1;
2117
2118         if (ic_opmode == NL80211_IFTYPE_AP)
2119                 ath9k_hw_set_tsfadjust(sc->sc_ah, 1);
2120
2121         sc->sc_vaps[0] = conf->vif;
2122         sc->sc_nvaps++;
2123
2124         /* Set the device opmode */
2125         sc->sc_ah->ah_opmode = ic_opmode;
2126
2127         if (conf->type == NL80211_IFTYPE_AP) {
2128                 /* TODO: is this a suitable place to start ANI for AP mode? */
2129                 /* Start ANI */
2130                 mod_timer(&sc->sc_ani.timer,
2131                           jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
2132         }
2133
2134         return 0;
2135 }
2136
2137 static void ath9k_remove_interface(struct ieee80211_hw *hw,
2138                                    struct ieee80211_if_init_conf *conf)
2139 {
2140         struct ath_softc *sc = hw->priv;
2141         struct ath_vap *avp = (void *)conf->vif->drv_priv;
2142
2143         DPRINTF(sc, ATH_DBG_CONFIG, "Detach Interface\n");
2144
2145         /* Stop ANI */
2146         del_timer_sync(&sc->sc_ani.timer);
2147
2148         /* Reclaim beacon resources */
2149         if (sc->sc_ah->ah_opmode == NL80211_IFTYPE_AP ||
2150             sc->sc_ah->ah_opmode == NL80211_IFTYPE_ADHOC) {
2151                 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
2152                 ath_beacon_return(sc, avp);
2153         }
2154
2155         sc->sc_flags &= ~SC_OP_BEACONS;
2156
2157         sc->sc_vaps[0] = NULL;
2158         sc->sc_nvaps--;
2159 }
2160
2161 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
2162 {
2163         struct ath_softc *sc = hw->priv;
2164         struct ieee80211_conf *conf = &hw->conf;
2165
2166         mutex_lock(&sc->mutex);
2167         if (changed & IEEE80211_CONF_CHANGE_PS) {
2168                 if (conf->flags & IEEE80211_CONF_PS) {
2169                         if ((sc->sc_imask & ATH9K_INT_TIM_TIMER) == 0) {
2170                                 sc->sc_imask |= ATH9K_INT_TIM_TIMER;
2171                                 ath9k_hw_set_interrupts(sc->sc_ah,
2172                                                 sc->sc_imask);
2173                         }
2174                         ath9k_hw_setrxabort(sc->sc_ah, 1);
2175                         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
2176                 } else {
2177                         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
2178                         ath9k_hw_setrxabort(sc->sc_ah, 0);
2179                         sc->sc_flags &= ~SC_OP_WAIT_FOR_BEACON;
2180                         if (sc->sc_imask & ATH9K_INT_TIM_TIMER) {
2181                                 sc->sc_imask &= ~ATH9K_INT_TIM_TIMER;
2182                                 ath9k_hw_set_interrupts(sc->sc_ah,
2183                                                 sc->sc_imask);
2184                         }
2185                 }
2186         }
2187
2188         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
2189                 struct ieee80211_channel *curchan = hw->conf.channel;
2190                 int pos = curchan->hw_value;
2191
2192                 DPRINTF(sc, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
2193                         curchan->center_freq);
2194
2195                 /* XXX: remove me eventualy */
2196                 ath9k_update_ichannel(sc, &sc->sc_ah->ah_channels[pos]);
2197
2198                 ath_update_chainmask(sc, conf_is_ht(conf));
2199
2200                 if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0) {
2201                         DPRINTF(sc, ATH_DBG_FATAL, "Unable to set channel\n");
2202                         mutex_unlock(&sc->mutex);
2203                         return -EINVAL;
2204                 }
2205         }
2206
2207         if (changed & IEEE80211_CONF_CHANGE_POWER)
2208                 sc->sc_config.txpowlimit = 2 * conf->power_level;
2209
2210         mutex_unlock(&sc->mutex);
2211         return 0;
2212 }
2213
2214 static int ath9k_config_interface(struct ieee80211_hw *hw,
2215                                   struct ieee80211_vif *vif,
2216                                   struct ieee80211_if_conf *conf)
2217 {
2218         struct ath_softc *sc = hw->priv;
2219         struct ath_hal *ah = sc->sc_ah;
2220         struct ath_vap *avp = (void *)vif->drv_priv;
2221         u32 rfilt = 0;
2222         int error, i;
2223
2224         /* TODO: Need to decide which hw opmode to use for multi-interface
2225          * cases */
2226         if (vif->type == NL80211_IFTYPE_AP &&
2227             ah->ah_opmode != NL80211_IFTYPE_AP) {
2228                 ah->ah_opmode = NL80211_IFTYPE_STATION;
2229                 ath9k_hw_setopmode(ah);
2230                 ath9k_hw_write_associd(ah, sc->sc_myaddr, 0);
2231                 /* Request full reset to get hw opmode changed properly */
2232                 sc->sc_flags |= SC_OP_FULL_RESET;
2233         }
2234
2235         if ((conf->changed & IEEE80211_IFCC_BSSID) &&
2236             !is_zero_ether_addr(conf->bssid)) {
2237                 switch (vif->type) {
2238                 case NL80211_IFTYPE_STATION:
2239                 case NL80211_IFTYPE_ADHOC:
2240                         /* Set BSSID */
2241                         memcpy(sc->sc_curbssid, conf->bssid, ETH_ALEN);
2242                         sc->sc_curaid = 0;
2243                         ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
2244                                                sc->sc_curaid);
2245
2246                         /* Set aggregation protection mode parameters */
2247                         sc->sc_config.ath_aggr_prot = 0;
2248
2249                         DPRINTF(sc, ATH_DBG_CONFIG,
2250                                 "RX filter 0x%x bssid %pM aid 0x%x\n",
2251                                 rfilt, sc->sc_curbssid, sc->sc_curaid);
2252
2253                         /* need to reconfigure the beacon */
2254                         sc->sc_flags &= ~SC_OP_BEACONS ;
2255
2256                         break;
2257                 default:
2258                         break;
2259                 }
2260         }
2261
2262         if ((vif->type == NL80211_IFTYPE_ADHOC) ||
2263             (vif->type == NL80211_IFTYPE_AP)) {
2264                 if ((conf->changed & IEEE80211_IFCC_BEACON) ||
2265                     (conf->changed & IEEE80211_IFCC_BEACON_ENABLED &&
2266                      conf->enable_beacon)) {
2267                         /*
2268                          * Allocate and setup the beacon frame.
2269                          *
2270                          * Stop any previous beacon DMA.  This may be
2271                          * necessary, for example, when an ibss merge
2272                          * causes reconfiguration; we may be called
2273                          * with beacon transmission active.
2274                          */
2275                         ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
2276
2277                         error = ath_beacon_alloc(sc, 0);
2278                         if (error != 0)
2279                                 return error;
2280
2281                         ath_beacon_sync(sc, 0);
2282                 }
2283         }
2284
2285         /* Check for WLAN_CAPABILITY_PRIVACY ? */
2286         if ((avp->av_opmode != NL80211_IFTYPE_STATION)) {
2287                 for (i = 0; i < IEEE80211_WEP_NKID; i++)
2288                         if (ath9k_hw_keyisvalid(sc->sc_ah, (u16)i))
2289                                 ath9k_hw_keysetmac(sc->sc_ah,
2290                                                    (u16)i,
2291                                                    sc->sc_curbssid);
2292         }
2293
2294         /* Only legacy IBSS for now */
2295         if (vif->type == NL80211_IFTYPE_ADHOC)
2296                 ath_update_chainmask(sc, 0);
2297
2298         return 0;
2299 }
2300
2301 #define SUPPORTED_FILTERS                       \
2302         (FIF_PROMISC_IN_BSS |                   \
2303         FIF_ALLMULTI |                          \
2304         FIF_CONTROL |                           \
2305         FIF_OTHER_BSS |                         \
2306         FIF_BCN_PRBRESP_PROMISC |               \
2307         FIF_FCSFAIL)
2308
2309 /* FIXME: sc->sc_full_reset ? */
2310 static void ath9k_configure_filter(struct ieee80211_hw *hw,
2311                                    unsigned int changed_flags,
2312                                    unsigned int *total_flags,
2313                                    int mc_count,
2314                                    struct dev_mc_list *mclist)
2315 {
2316         struct ath_softc *sc = hw->priv;
2317         u32 rfilt;
2318
2319         changed_flags &= SUPPORTED_FILTERS;
2320         *total_flags &= SUPPORTED_FILTERS;
2321
2322         sc->rx.rxfilter = *total_flags;
2323         rfilt = ath_calcrxfilter(sc);
2324         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
2325
2326         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
2327                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
2328                         ath9k_hw_write_associd(sc->sc_ah, ath_bcast_mac, 0);
2329         }
2330
2331         DPRINTF(sc, ATH_DBG_CONFIG, "Set HW RX filter: 0x%x\n", sc->rx.rxfilter);
2332 }
2333
2334 static void ath9k_sta_notify(struct ieee80211_hw *hw,
2335                              struct ieee80211_vif *vif,
2336                              enum sta_notify_cmd cmd,
2337                              struct ieee80211_sta *sta)
2338 {
2339         struct ath_softc *sc = hw->priv;
2340
2341         switch (cmd) {
2342         case STA_NOTIFY_ADD:
2343                 ath_node_attach(sc, sta);
2344                 break;
2345         case STA_NOTIFY_REMOVE:
2346                 ath_node_detach(sc, sta);
2347                 break;
2348         default:
2349                 break;
2350         }
2351 }
2352
2353 static int ath9k_conf_tx(struct ieee80211_hw *hw,
2354                          u16 queue,
2355                          const struct ieee80211_tx_queue_params *params)
2356 {
2357         struct ath_softc *sc = hw->priv;
2358         struct ath9k_tx_queue_info qi;
2359         int ret = 0, qnum;
2360
2361         if (queue >= WME_NUM_AC)
2362                 return 0;
2363
2364         qi.tqi_aifs = params->aifs;
2365         qi.tqi_cwmin = params->cw_min;
2366         qi.tqi_cwmax = params->cw_max;
2367         qi.tqi_burstTime = params->txop;
2368         qnum = ath_get_hal_qnum(queue, sc);
2369
2370         DPRINTF(sc, ATH_DBG_CONFIG,
2371                 "Configure tx [queue/halq] [%d/%d],  "
2372                 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
2373                 queue, qnum, params->aifs, params->cw_min,
2374                 params->cw_max, params->txop);
2375
2376         ret = ath_txq_update(sc, qnum, &qi);
2377         if (ret)
2378                 DPRINTF(sc, ATH_DBG_FATAL, "TXQ Update failed\n");
2379
2380         return ret;
2381 }
2382
2383 static int ath9k_set_key(struct ieee80211_hw *hw,
2384                          enum set_key_cmd cmd,
2385                          struct ieee80211_vif *vif,
2386                          struct ieee80211_sta *sta,
2387                          struct ieee80211_key_conf *key)
2388 {
2389         struct ath_softc *sc = hw->priv;
2390         int ret = 0;
2391
2392         ath9k_ps_wakeup(sc);
2393         DPRINTF(sc, ATH_DBG_KEYCACHE, "Set HW Key\n");
2394
2395         switch (cmd) {
2396         case SET_KEY:
2397                 ret = ath_key_config(sc, sta, key);
2398                 if (ret >= 0) {
2399                         key->hw_key_idx = ret;
2400                         /* push IV and Michael MIC generation to stack */
2401                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2402                         if (key->alg == ALG_TKIP)
2403                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2404                         if (sc->sc_ah->sw_mgmt_crypto && key->alg == ALG_CCMP)
2405                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
2406                         ret = 0;
2407                 }
2408                 break;
2409         case DISABLE_KEY:
2410                 ath_key_delete(sc, key);
2411                 break;
2412         default:
2413                 ret = -EINVAL;
2414         }
2415
2416         ath9k_ps_restore(sc);
2417         return ret;
2418 }
2419
2420 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
2421                                    struct ieee80211_vif *vif,
2422                                    struct ieee80211_bss_conf *bss_conf,
2423                                    u32 changed)
2424 {
2425         struct ath_softc *sc = hw->priv;
2426
2427         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
2428                 DPRINTF(sc, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
2429                         bss_conf->use_short_preamble);
2430                 if (bss_conf->use_short_preamble)
2431                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
2432                 else
2433                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2434         }
2435
2436         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2437                 DPRINTF(sc, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
2438                         bss_conf->use_cts_prot);
2439                 if (bss_conf->use_cts_prot &&
2440                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2441                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2442                 else
2443                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2444         }
2445
2446         if (changed & BSS_CHANGED_ASSOC) {
2447                 DPRINTF(sc, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
2448                         bss_conf->assoc);
2449                 ath9k_bss_assoc_info(sc, vif, bss_conf);
2450         }
2451 }
2452
2453 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
2454 {
2455         u64 tsf;
2456         struct ath_softc *sc = hw->priv;
2457         struct ath_hal *ah = sc->sc_ah;
2458
2459         tsf = ath9k_hw_gettsf64(ah);
2460
2461         return tsf;
2462 }
2463
2464 static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
2465 {
2466         struct ath_softc *sc = hw->priv;
2467         struct ath_hal *ah = sc->sc_ah;
2468
2469         ath9k_hw_settsf64(ah, tsf);
2470 }
2471
2472 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
2473 {
2474         struct ath_softc *sc = hw->priv;
2475         struct ath_hal *ah = sc->sc_ah;
2476
2477         ath9k_hw_reset_tsf(ah);
2478 }
2479
2480 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2481                        enum ieee80211_ampdu_mlme_action action,
2482                        struct ieee80211_sta *sta,
2483                        u16 tid, u16 *ssn)
2484 {
2485         struct ath_softc *sc = hw->priv;
2486         int ret = 0;
2487
2488         switch (action) {
2489         case IEEE80211_AMPDU_RX_START:
2490                 if (!(sc->sc_flags & SC_OP_RXAGGR))
2491                         ret = -ENOTSUPP;
2492                 break;
2493         case IEEE80211_AMPDU_RX_STOP:
2494                 break;
2495         case IEEE80211_AMPDU_TX_START:
2496                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2497                 if (ret < 0)
2498                         DPRINTF(sc, ATH_DBG_FATAL,
2499                                 "Unable to start TX aggregation\n");
2500                 else
2501                         ieee80211_start_tx_ba_cb_irqsafe(hw, sta->addr, tid);
2502                 break;
2503         case IEEE80211_AMPDU_TX_STOP:
2504                 ret = ath_tx_aggr_stop(sc, sta, tid);
2505                 if (ret < 0)
2506                         DPRINTF(sc, ATH_DBG_FATAL,
2507                                 "Unable to stop TX aggregation\n");
2508
2509                 ieee80211_stop_tx_ba_cb_irqsafe(hw, sta->addr, tid);
2510                 break;
2511         case IEEE80211_AMPDU_TX_RESUME:
2512                 ath_tx_aggr_resume(sc, sta, tid);
2513                 break;
2514         default:
2515                 DPRINTF(sc, ATH_DBG_FATAL, "Unknown AMPDU action\n");
2516         }
2517
2518         return ret;
2519 }
2520
2521 struct ieee80211_ops ath9k_ops = {
2522         .tx                 = ath9k_tx,
2523         .start              = ath9k_start,
2524         .stop               = ath9k_stop,
2525         .add_interface      = ath9k_add_interface,
2526         .remove_interface   = ath9k_remove_interface,
2527         .config             = ath9k_config,
2528         .config_interface   = ath9k_config_interface,
2529         .configure_filter   = ath9k_configure_filter,
2530         .sta_notify         = ath9k_sta_notify,
2531         .conf_tx            = ath9k_conf_tx,
2532         .bss_info_changed   = ath9k_bss_info_changed,
2533         .set_key            = ath9k_set_key,
2534         .get_tsf            = ath9k_get_tsf,
2535         .set_tsf            = ath9k_set_tsf,
2536         .reset_tsf          = ath9k_reset_tsf,
2537         .ampdu_action       = ath9k_ampdu_action,
2538 };
2539
2540 static struct {
2541         u32 version;
2542         const char * name;
2543 } ath_mac_bb_names[] = {
2544         { AR_SREV_VERSION_5416_PCI,     "5416" },
2545         { AR_SREV_VERSION_5416_PCIE,    "5418" },
2546         { AR_SREV_VERSION_9100,         "9100" },
2547         { AR_SREV_VERSION_9160,         "9160" },
2548         { AR_SREV_VERSION_9280,         "9280" },
2549         { AR_SREV_VERSION_9285,         "9285" }
2550 };
2551
2552 static struct {
2553         u16 version;
2554         const char * name;
2555 } ath_rf_names[] = {
2556         { 0,                            "5133" },
2557         { AR_RAD5133_SREV_MAJOR,        "5133" },
2558         { AR_RAD5122_SREV_MAJOR,        "5122" },
2559         { AR_RAD2133_SREV_MAJOR,        "2133" },
2560         { AR_RAD2122_SREV_MAJOR,        "2122" }
2561 };
2562
2563 /*
2564  * Return the MAC/BB name. "????" is returned if the MAC/BB is unknown.
2565  */
2566 const char *
2567 ath_mac_bb_name(u32 mac_bb_version)
2568 {
2569         int i;
2570
2571         for (i=0; i<ARRAY_SIZE(ath_mac_bb_names); i++) {
2572                 if (ath_mac_bb_names[i].version == mac_bb_version) {
2573                         return ath_mac_bb_names[i].name;
2574                 }
2575         }
2576
2577         return "????";
2578 }
2579
2580 /*
2581  * Return the RF name. "????" is returned if the RF is unknown.
2582  */
2583 const char *
2584 ath_rf_name(u16 rf_version)
2585 {
2586         int i;
2587
2588         for (i=0; i<ARRAY_SIZE(ath_rf_names); i++) {
2589                 if (ath_rf_names[i].version == rf_version) {
2590                         return ath_rf_names[i].name;
2591                 }
2592         }
2593
2594         return "????";
2595 }
2596
2597 static int __init ath9k_init(void)
2598 {
2599         int error;
2600
2601         /* Register rate control algorithm */
2602         error = ath_rate_control_register();
2603         if (error != 0) {
2604                 printk(KERN_ERR
2605                         "ath9k: Unable to register rate control "
2606                         "algorithm: %d\n",
2607                         error);
2608                 goto err_out;
2609         }
2610
2611         error = ath_pci_init();
2612         if (error < 0) {
2613                 printk(KERN_ERR
2614                         "ath9k: No PCI devices found, driver not installed.\n");
2615                 error = -ENODEV;
2616                 goto err_rate_unregister;
2617         }
2618
2619         error = ath_ahb_init();
2620         if (error < 0) {
2621                 error = -ENODEV;
2622                 goto err_pci_exit;
2623         }
2624
2625         return 0;
2626
2627  err_pci_exit:
2628         ath_pci_exit();
2629
2630  err_rate_unregister:
2631         ath_rate_control_unregister();
2632  err_out:
2633         return error;
2634 }
2635 module_init(ath9k_init);
2636
2637 static void __exit ath9k_exit(void)
2638 {
2639         ath_ahb_exit();
2640         ath_pci_exit();
2641         ath_rate_control_unregister();
2642         printk(KERN_INFO "%s: Driver unloaded\n", dev_info);
2643 }
2644 module_exit(ath9k_exit);