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

   1 /*
   2  * Copyright (c) 2008-2009 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/slab.h>
  18
  19 #include "ath9k.h"
  20
  21 static char *dev_info = "ath9k";
  22
  23 MODULE_AUTHOR("Atheros Communications");
  24 MODULE_DESCRIPTION("Support for Atheros 802.11n wireless LAN cards.");
  25 MODULE_SUPPORTED_DEVICE("Atheros 802.11n WLAN cards");
  26 MODULE_LICENSE("Dual BSD/GPL");
  27
  28 static unsigned int ath9k_debug = ATH_DBG_DEFAULT;
  29 module_param_named(debug, ath9k_debug, uint, 0);
  30 MODULE_PARM_DESC(debug, "Debugging mask");
  31
  32 int ath9k_modparam_nohwcrypt;
  33 module_param_named(nohwcrypt, ath9k_modparam_nohwcrypt, int, 0444);
  34 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption");
  35
  36 int led_blink;
  37 module_param_named(blink, led_blink, int, 0444);
  38 MODULE_PARM_DESC(blink, "Enable LED blink on activity");
  39
  40 static int ath9k_btcoex_enable;
  41 module_param_named(btcoex_enable, ath9k_btcoex_enable, int, 0444);
  42 MODULE_PARM_DESC(btcoex_enable, "Enable wifi-BT coexistence");
  43
  44 int ath9k_pm_qos_value = ATH9K_PM_QOS_DEFAULT_VALUE;
  45 module_param_named(pmqos, ath9k_pm_qos_value, int, S_IRUSR | S_IRGRP | S_IROTH);
  46 MODULE_PARM_DESC(pmqos, "User specified PM-QOS value");
  47
  48 bool is_ath9k_unloaded;
  49 /* We use the hw_value as an index into our private channel structure */
  50
  51 #define CHAN2G(_freq, _idx)  { \
  52         .band = IEEE80211_BAND_2GHZ, \
  53         .center_freq = (_freq), \
  54         .hw_value = (_idx), \
  55         .max_power = 20, \
  56 }
  57
  58 #define CHAN5G(_freq, _idx) { \
  59         .band = IEEE80211_BAND_5GHZ, \
  60         .center_freq = (_freq), \
  61         .hw_value = (_idx), \
  62         .max_power = 20, \
  63 }
  64
  65 /* Some 2 GHz radios are actually tunable on 2312-2732
  66  * on 5 MHz steps, we support the channels which we know
  67  * we have calibration data for all cards though to make
  68  * this static */
  69 static const struct ieee80211_channel ath9k_2ghz_chantable[] = {
  70         CHAN2G(2412, 0), /* Channel 1 */
  71         CHAN2G(2417, 1), /* Channel 2 */
  72         CHAN2G(2422, 2), /* Channel 3 */
  73         CHAN2G(2427, 3), /* Channel 4 */
  74         CHAN2G(2432, 4), /* Channel 5 */
  75         CHAN2G(2437, 5), /* Channel 6 */
  76         CHAN2G(2442, 6), /* Channel 7 */
  77         CHAN2G(2447, 7), /* Channel 8 */
  78         CHAN2G(2452, 8), /* Channel 9 */
  79         CHAN2G(2457, 9), /* Channel 10 */
  80         CHAN2G(2462, 10), /* Channel 11 */
  81         CHAN2G(2467, 11), /* Channel 12 */
  82         CHAN2G(2472, 12), /* Channel 13 */
  83         CHAN2G(2484, 13), /* Channel 14 */
  84 };
  85
  86 /* Some 5 GHz radios are actually tunable on XXXX-YYYY
  87  * on 5 MHz steps, we support the channels which we know
  88  * we have calibration data for all cards though to make
  89  * this static */
  90 static const struct ieee80211_channel ath9k_5ghz_chantable[] = {
  91         /* _We_ call this UNII 1 */
  92         CHAN5G(5180, 14), /* Channel 36 */
  93         CHAN5G(5200, 15), /* Channel 40 */
  94         CHAN5G(5220, 16), /* Channel 44 */
  95         CHAN5G(5240, 17), /* Channel 48 */
  96         /* _We_ call this UNII 2 */
  97         CHAN5G(5260, 18), /* Channel 52 */
  98         CHAN5G(5280, 19), /* Channel 56 */
  99         CHAN5G(5300, 20), /* Channel 60 */
 100         CHAN5G(5320, 21), /* Channel 64 */
 101         /* _We_ call this "Middle band" */
 102         CHAN5G(5500, 22), /* Channel 100 */
 103         CHAN5G(5520, 23), /* Channel 104 */
 104         CHAN5G(5540, 24), /* Channel 108 */
 105         CHAN5G(5560, 25), /* Channel 112 */
 106         CHAN5G(5580, 26), /* Channel 116 */
 107         CHAN5G(5600, 27), /* Channel 120 */
 108         CHAN5G(5620, 28), /* Channel 124 */
 109         CHAN5G(5640, 29), /* Channel 128 */
 110         CHAN5G(5660, 30), /* Channel 132 */
 111         CHAN5G(5680, 31), /* Channel 136 */
 112         CHAN5G(5700, 32), /* Channel 140 */
 113         /* _We_ call this UNII 3 */
 114         CHAN5G(5745, 33), /* Channel 149 */
 115         CHAN5G(5765, 34), /* Channel 153 */
 116         CHAN5G(5785, 35), /* Channel 157 */
 117         CHAN5G(5805, 36), /* Channel 161 */
 118         CHAN5G(5825, 37), /* Channel 165 */
 119 };
 120
 121 /* Atheros hardware rate code addition for short premble */
 122 #define SHPCHECK(__hw_rate, __flags) \
 123         ((__flags & IEEE80211_RATE_SHORT_PREAMBLE) ? (__hw_rate | 0x04 ) : 0)
 124
 125 #define RATE(_bitrate, _hw_rate, _flags) {              \
 126         .bitrate        = (_bitrate),                   \
 127         .flags          = (_flags),                     \
 128         .hw_value       = (_hw_rate),                   \
 129         .hw_value_short = (SHPCHECK(_hw_rate, _flags))  \
 130 }
 131
 132 static struct ieee80211_rate ath9k_legacy_rates[] = {
 133         RATE(10, 0x1b, 0),
 134         RATE(20, 0x1a, IEEE80211_RATE_SHORT_PREAMBLE),
 135         RATE(55, 0x19, IEEE80211_RATE_SHORT_PREAMBLE),
 136         RATE(110, 0x18, IEEE80211_RATE_SHORT_PREAMBLE),
 137         RATE(60, 0x0b, 0),
 138         RATE(90, 0x0f, 0),
 139         RATE(120, 0x0a, 0),
 140         RATE(180, 0x0e, 0),
 141         RATE(240, 0x09, 0),
 142         RATE(360, 0x0d, 0),
 143         RATE(480, 0x08, 0),
 144         RATE(540, 0x0c, 0),
 145 };
 146
 147 static void ath9k_deinit_softc(struct ath_softc *sc);
 148
 149 /*
 150  * Read and write, they both share the same lock. We do this to serialize
 151  * reads and writes on Atheros 802.11n PCI devices only. This is required
 152  * as the FIFO on these devices can only accept sanely 2 requests.
 153  */
 154
 155 static void ath9k_iowrite32(void *hw_priv, u32 val, u32 reg_offset)
 156 {
 157         struct ath_hw *ah = (struct ath_hw *) hw_priv;
 158         struct ath_common *common = ath9k_hw_common(ah);
 159         struct ath_softc *sc = (struct ath_softc *) common->priv;
 160
 161         if (ah->config.serialize_regmode == SER_REG_MODE_ON) {
 162                 unsigned long flags;
 163                 spin_lock_irqsave(&sc->sc_serial_rw, flags);
 164                 iowrite32(val, sc->mem + reg_offset);
 165                 spin_unlock_irqrestore(&sc->sc_serial_rw, flags);
 166         } else
 167                 iowrite32(val, sc->mem + reg_offset);
 168 }
 169
 170 static unsigned int ath9k_ioread32(void *hw_priv, u32 reg_offset)
 171 {
 172         struct ath_hw *ah = (struct ath_hw *) hw_priv;
 173         struct ath_common *common = ath9k_hw_common(ah);
 174         struct ath_softc *sc = (struct ath_softc *) common->priv;
 175         u32 val;
 176
 177         if (ah->config.serialize_regmode == SER_REG_MODE_ON) {
 178                 unsigned long flags;
 179                 spin_lock_irqsave(&sc->sc_serial_rw, flags);
 180                 val = ioread32(sc->mem + reg_offset);
 181                 spin_unlock_irqrestore(&sc->sc_serial_rw, flags);
 182         } else
 183                 val = ioread32(sc->mem + reg_offset);
 184         return val;
 185 }
 186
 187 static const struct ath_ops ath9k_common_ops = {
 188         .read = ath9k_ioread32,
 189         .write = ath9k_iowrite32,
 190 };
 191
 192 /**************************/
 193 /*     Initialization     */
 194 /**************************/
 195
 196 static void setup_ht_cap(struct ath_softc *sc,
 197                          struct ieee80211_sta_ht_cap *ht_info)
 198 {
 199         struct ath_hw *ah = sc->sc_ah;
 200         struct ath_common *common = ath9k_hw_common(ah);
 201         u8 tx_streams, rx_streams;
 202         int i, max_streams;
 203
 204         ht_info->ht_supported = true;
 205         ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 206                        IEEE80211_HT_CAP_SM_PS |
 207                        IEEE80211_HT_CAP_SGI_40 |
 208                        IEEE80211_HT_CAP_DSSSCCK40;
 209
 210         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_LDPC)
 211                 ht_info->cap |= IEEE80211_HT_CAP_LDPC_CODING;
 212
 213         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20)
 214                 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 215
 216         ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
 217         ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_8;
 218
 219         if (AR_SREV_9485(ah))
 220                 max_streams = 1;
 221         else if (AR_SREV_9300_20_OR_LATER(ah))
 222                 max_streams = 3;
 223         else
 224                 max_streams = 2;
 225
 226         if (AR_SREV_9280_20_OR_LATER(ah)) {
 227                 if (max_streams >= 2)
 228                         ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
 229                 ht_info->cap |= (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
 230         }
 231
 232         /* set up supported mcs set */
 233         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 234         tx_streams = ath9k_cmn_count_streams(common->tx_chainmask, max_streams);
 235         rx_streams = ath9k_cmn_count_streams(common->rx_chainmask, max_streams);
 236
 237         ath_dbg(common, ATH_DBG_CONFIG,
 238                 "TX streams %d, RX streams: %d\n",
 239                 tx_streams, rx_streams);
 240
 241         if (tx_streams != rx_streams) {
 242                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 243                 ht_info->mcs.tx_params |= ((tx_streams - 1) <<
 244                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 245         }
 246
 247         for (i = 0; i < rx_streams; i++)
 248                 ht_info->mcs.rx_mask[i] = 0xff;
 249
 250         ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_DEFINED;
 251 }
 252
 253 static int ath9k_reg_notifier(struct wiphy *wiphy,
 254                               struct regulatory_request *request)
 255 {
 256         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 257         struct ath_wiphy *aphy = hw->priv;
 258         struct ath_softc *sc = aphy->sc;
 259         struct ath_regulatory *reg = ath9k_hw_regulatory(sc->sc_ah);
 260
 261         return ath_reg_notifier_apply(wiphy, request, reg);
 262 }
 263
 264 /*
 265  *  This function will allocate both the DMA descriptor structure, and the
 266  *  buffers it contains.  These are used to contain the descriptors used
 267  *  by the system.
 268 */
 269 int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
 270                       struct list_head *head, const char *name,
 271                       int nbuf, int ndesc, bool is_tx)
 272 {
 273 #define DS2PHYS(_dd, _ds)                                               \
 274         ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
 275 #define ATH_DESC_4KB_BOUND_CHECK(_daddr) ((((_daddr) & 0xFFF) > 0xF7F) ? 1 : 0)
 276 #define ATH_DESC_4KB_BOUND_NUM_SKIPPED(_len) ((_len) / 4096)
 277         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 278         u8 *ds;
 279         struct ath_buf *bf;
 280         int i, bsize, error, desc_len;
 281
 282         ath_dbg(common, ATH_DBG_CONFIG, "%s DMA: %u buffers %u desc/buf\n",
 283                 name, nbuf, ndesc);
 284
 285         INIT_LIST_HEAD(head);
 286
 287         if (is_tx)
 288                 desc_len = sc->sc_ah->caps.tx_desc_len;
 289         else
 290                 desc_len = sizeof(struct ath_desc);
 291
 292         /* ath_desc must be a multiple of DWORDs */
 293         if ((desc_len % 4) != 0) {
 294                 ath_err(common, "ath_desc not DWORD aligned\n");
 295                 BUG_ON((desc_len % 4) != 0);
 296                 error = -ENOMEM;
 297                 goto fail;
 298         }
 299
 300         dd->dd_desc_len = desc_len * nbuf * ndesc;
 301
 302         /*
 303          * Need additional DMA memory because we can't use
 304          * descriptors that cross the 4K page boundary. Assume
 305          * one skipped descriptor per 4K page.
 306          */
 307         if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_4KB_SPLITTRANS)) {
 308                 u32 ndesc_skipped =
 309                         ATH_DESC_4KB_BOUND_NUM_SKIPPED(dd->dd_desc_len);
 310                 u32 dma_len;
 311
 312                 while (ndesc_skipped) {
 313                         dma_len = ndesc_skipped * desc_len;
 314                         dd->dd_desc_len += dma_len;
 315
 316                         ndesc_skipped = ATH_DESC_4KB_BOUND_NUM_SKIPPED(dma_len);
 317                 }
 318         }
 319
 320         /* allocate descriptors */
 321         dd->dd_desc = dma_alloc_coherent(sc->dev, dd->dd_desc_len,
 322                                          &dd->dd_desc_paddr, GFP_KERNEL);
 323         if (dd->dd_desc == NULL) {
 324                 error = -ENOMEM;
 325                 goto fail;
 326         }
 327         ds = (u8 *) dd->dd_desc;
 328         ath_dbg(common, ATH_DBG_CONFIG, "%s DMA map: %p (%u) -> %llx (%u)\n",
 329                 name, ds, (u32) dd->dd_desc_len,
 330                 ito64(dd->dd_desc_paddr), /*XXX*/(u32) dd->dd_desc_len);
 331
 332         /* allocate buffers */
 333         bsize = sizeof(struct ath_buf) * nbuf;
 334         bf = kzalloc(bsize, GFP_KERNEL);
 335         if (bf == NULL) {
 336                 error = -ENOMEM;
 337                 goto fail2;
 338         }
 339         dd->dd_bufptr = bf;
 340
 341         for (i = 0; i < nbuf; i++, bf++, ds += (desc_len * ndesc)) {
 342                 bf->bf_desc = ds;
 343                 bf->bf_daddr = DS2PHYS(dd, ds);
 344
 345                 if (!(sc->sc_ah->caps.hw_caps &
 346                       ATH9K_HW_CAP_4KB_SPLITTRANS)) {
 347                         /*
 348                          * Skip descriptor addresses which can cause 4KB
 349                          * boundary crossing (addr + length) with a 32 dword
 350                          * descriptor fetch.
 351                          */
 352                         while (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr)) {
 353                                 BUG_ON((caddr_t) bf->bf_desc >=
 354                                        ((caddr_t) dd->dd_desc +
 355                                         dd->dd_desc_len));
 356
 357                                 ds += (desc_len * ndesc);
 358                                 bf->bf_desc = ds;
 359                                 bf->bf_daddr = DS2PHYS(dd, ds);
 360                         }
 361                 }
 362                 list_add_tail(&bf->list, head);
 363         }
 364         return 0;
 365 fail2:
 366         dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
 367                           dd->dd_desc_paddr);
 368 fail:
 369         memset(dd, 0, sizeof(*dd));
 370         return error;
 371 #undef ATH_DESC_4KB_BOUND_CHECK
 372 #undef ATH_DESC_4KB_BOUND_NUM_SKIPPED
 373 #undef DS2PHYS
 374 }
 375
 376 void ath9k_init_crypto(struct ath_softc *sc)
 377 {
 378         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 379         int i = 0;
 380
 381         /* Get the hardware key cache size. */
 382         common->keymax = sc->sc_ah->caps.keycache_size;
 383         if (common->keymax > ATH_KEYMAX) {
 384                 ath_dbg(common, ATH_DBG_ANY,
 385                         "Warning, using only %u entries in %u key cache\n",
 386                         ATH_KEYMAX, common->keymax);
 387                 common->keymax = ATH_KEYMAX;
 388         }
 389
 390         /*
 391          * Reset the key cache since some parts do not
 392          * reset the contents on initial power up.
 393          */
 394         for (i = 0; i < common->keymax; i++)
 395                 ath_hw_keyreset(common, (u16) i);
 396
 397         /*
 398          * Check whether the separate key cache entries
 399          * are required to handle both tx+rx MIC keys.
 400          * With split mic keys the number of stations is limited
 401          * to 27 otherwise 59.
 402          */
 403         if (sc->sc_ah->misc_mode & AR_PCU_MIC_NEW_LOC_ENA)
 404                 common->crypt_caps |= ATH_CRYPT_CAP_MIC_COMBINED;
 405 }
 406
 407 static int ath9k_init_btcoex(struct ath_softc *sc)
 408 {
 409         struct ath_txq *txq;
 410         int r;
 411
 412         switch (sc->sc_ah->btcoex_hw.scheme) {
 413         case ATH_BTCOEX_CFG_NONE:
 414                 break;
 415         case ATH_BTCOEX_CFG_2WIRE:
 416                 ath9k_hw_btcoex_init_2wire(sc->sc_ah);
 417                 break;
 418         case ATH_BTCOEX_CFG_3WIRE:
 419                 ath9k_hw_btcoex_init_3wire(sc->sc_ah);
 420                 r = ath_init_btcoex_timer(sc);
 421                 if (r)
 422                         return -1;
 423                 txq = sc->tx.txq_map[WME_AC_BE];
 424                 ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum);
 425                 sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
 426                 break;
 427         default:
 428                 WARN_ON(1);
 429                 break;
 430         }
 431
 432         return 0;
 433 }
 434
 435 static int ath9k_init_queues(struct ath_softc *sc)
 436 {
 437         int i = 0;
 438
 439         sc->beacon.beaconq = ath9k_hw_beaconq_setup(sc->sc_ah);
 440         sc->beacon.cabq = ath_txq_setup(sc, ATH9K_TX_QUEUE_CAB, 0);
 441
 442         sc->config.cabqReadytime = ATH_CABQ_READY_TIME;
 443         ath_cabq_update(sc);
 444
 445         for (i = 0; i < WME_NUM_AC; i++)
 446                 sc->tx.txq_map[i] = ath_txq_setup(sc, ATH9K_TX_QUEUE_DATA, i);
 447
 448         return 0;
 449 }
 450
 451 static int ath9k_init_channels_rates(struct ath_softc *sc)
 452 {
 453         void *channels;
 454
 455         BUILD_BUG_ON(ARRAY_SIZE(ath9k_2ghz_chantable) +
 456                      ARRAY_SIZE(ath9k_5ghz_chantable) !=
 457                      ATH9K_NUM_CHANNELS);
 458
 459         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ) {
 460                 channels = kmemdup(ath9k_2ghz_chantable,
 461                         sizeof(ath9k_2ghz_chantable), GFP_KERNEL);
 462                 if (!channels)
 463                     return -ENOMEM;
 464
 465                 sc->sbands[IEEE80211_BAND_2GHZ].channels = channels;
 466                 sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
 467                 sc->sbands[IEEE80211_BAND_2GHZ].n_channels =
 468                         ARRAY_SIZE(ath9k_2ghz_chantable);
 469                 sc->sbands[IEEE80211_BAND_2GHZ].bitrates = ath9k_legacy_rates;
 470                 sc->sbands[IEEE80211_BAND_2GHZ].n_bitrates =
 471                         ARRAY_SIZE(ath9k_legacy_rates);
 472         }
 473
 474         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ) {
 475                 channels = kmemdup(ath9k_5ghz_chantable,
 476                         sizeof(ath9k_5ghz_chantable), GFP_KERNEL);
 477                 if (!channels) {
 478                         if (sc->sbands[IEEE80211_BAND_2GHZ].channels)
 479                                 kfree(sc->sbands[IEEE80211_BAND_2GHZ].channels);
 480                         return -ENOMEM;
 481                 }
 482
 483                 sc->sbands[IEEE80211_BAND_5GHZ].channels = channels;
 484                 sc->sbands[IEEE80211_BAND_5GHZ].band = IEEE80211_BAND_5GHZ;
 485                 sc->sbands[IEEE80211_BAND_5GHZ].n_channels =
 486                         ARRAY_SIZE(ath9k_5ghz_chantable);
 487                 sc->sbands[IEEE80211_BAND_5GHZ].bitrates =
 488                         ath9k_legacy_rates + 4;
 489                 sc->sbands[IEEE80211_BAND_5GHZ].n_bitrates =
 490                         ARRAY_SIZE(ath9k_legacy_rates) - 4;
 491         }
 492         return 0;
 493 }
 494
 495 static void ath9k_init_misc(struct ath_softc *sc)
 496 {
 497         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 498         int i = 0;
 499
 500         setup_timer(&common->ani.timer, ath_ani_calibrate, (unsigned long)sc);
 501
 502         sc->config.txpowlimit = ATH_TXPOWER_MAX;
 503
 504         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
 505                 sc->sc_flags |= SC_OP_TXAGGR;
 506                 sc->sc_flags |= SC_OP_RXAGGR;
 507         }
 508
 509         common->tx_chainmask = sc->sc_ah->caps.tx_chainmask;
 510         common->rx_chainmask = sc->sc_ah->caps.rx_chainmask;
 511
 512         ath9k_hw_set_diversity(sc->sc_ah, true);
 513         sc->rx.defant = ath9k_hw_getdefantenna(sc->sc_ah);
 514
 515         memcpy(common->bssidmask, ath_bcast_mac, ETH_ALEN);
 516
 517         sc->beacon.slottime = ATH9K_SLOT_TIME_9;
 518
 519         for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {
 520                 sc->beacon.bslot[i] = NULL;
 521                 sc->beacon.bslot_aphy[i] = NULL;
 522         }
 523
 524         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB)
 525                 sc->ant_comb.count = ATH_ANT_DIV_COMB_INIT_COUNT;
 526 }
 527
 528 static int ath9k_init_softc(u16 devid, struct ath_softc *sc, u16 subsysid,
 529                             const struct ath_bus_ops *bus_ops)
 530 {
 531         struct ath_hw *ah = NULL;
 532         struct ath_common *common;
 533         int ret = 0, i;
 534         int csz = 0;
 535
 536         ah = kzalloc(sizeof(struct ath_hw), GFP_KERNEL);
 537         if (!ah)
 538                 return -ENOMEM;
 539
 540         ah->hw_version.devid = devid;
 541         ah->hw_version.subsysid = subsysid;
 542         sc->sc_ah = ah;
 543
 544         if (!sc->dev->platform_data)
 545                 ah->ah_flags |= AH_USE_EEPROM;
 546
 547         common = ath9k_hw_common(ah);
 548         common->ops = &ath9k_common_ops;
 549         common->bus_ops = bus_ops;
 550         common->ah = ah;
 551         common->hw = sc->hw;
 552         common->priv = sc;
 553         common->debug_mask = ath9k_debug;
 554         common->btcoex_enabled = ath9k_btcoex_enable == 1;
 555         spin_lock_init(&common->cc_lock);
 556
 557         spin_lock_init(&sc->wiphy_lock);
 558         spin_lock_init(&sc->sc_serial_rw);
 559         spin_lock_init(&sc->sc_pm_lock);
 560         mutex_init(&sc->mutex);
 561         tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);
 562         tasklet_init(&sc->bcon_tasklet, ath_beacon_tasklet,
 563                      (unsigned long)sc);
 564
 565         /*
 566          * Cache line size is used to size and align various
 567          * structures used to communicate with the hardware.
 568          */
 569         ath_read_cachesize(common, &csz);
 570         common->cachelsz = csz << 2; /* convert to bytes */
 571
 572         /* Initializes the hardware for all supported chipsets */
 573         ret = ath9k_hw_init(ah);
 574         if (ret)
 575                 goto err_hw;
 576
 577         ret = ath9k_init_queues(sc);
 578         if (ret)
 579                 goto err_queues;
 580
 581         ret =  ath9k_init_btcoex(sc);
 582         if (ret)
 583                 goto err_btcoex;
 584
 585         ret = ath9k_init_channels_rates(sc);
 586         if (ret)
 587                 goto err_btcoex;
 588
 589         ath9k_init_crypto(sc);
 590         ath9k_init_misc(sc);
 591
 592         return 0;
 593
 594 err_btcoex:
 595         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
 596                 if (ATH_TXQ_SETUP(sc, i))
 597                         ath_tx_cleanupq(sc, &sc->tx.txq[i]);
 598 err_queues:
 599         ath9k_hw_deinit(ah);
 600 err_hw:
 601         tasklet_kill(&sc->intr_tq);
 602         tasklet_kill(&sc->bcon_tasklet);
 603
 604         kfree(ah);
 605         sc->sc_ah = NULL;
 606
 607         return ret;
 608 }
 609
 610 static void ath9k_init_band_txpower(struct ath_softc *sc, int band)
 611 {
 612         struct ieee80211_supported_band *sband;
 613         struct ieee80211_channel *chan;
 614         struct ath_hw *ah = sc->sc_ah;
 615         struct ath_regulatory *reg = ath9k_hw_regulatory(ah);
 616         int i;
 617
 618         sband = &sc->sbands[band];
 619         for (i = 0; i < sband->n_channels; i++) {
 620                 chan = &sband->channels[i];
 621                 ah->curchan = &ah->channels[chan->hw_value];
 622                 ath9k_cmn_update_ichannel(ah->curchan, chan, NL80211_CHAN_HT20);
 623                 ath9k_hw_set_txpowerlimit(ah, MAX_RATE_POWER, true);
 624                 chan->max_power = reg->max_power_level / 2;
 625         }
 626 }
 627
 628 static void ath9k_init_txpower_limits(struct ath_softc *sc)
 629 {
 630         struct ath_hw *ah = sc->sc_ah;
 631         struct ath9k_channel *curchan = ah->curchan;
 632
 633         if (ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ)
 634                 ath9k_init_band_txpower(sc, IEEE80211_BAND_2GHZ);
 635         if (ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ)
 636                 ath9k_init_band_txpower(sc, IEEE80211_BAND_5GHZ);
 637
 638         ah->curchan = curchan;
 639 }
 640
 641 void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
 642 {
 643         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 644
 645         hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
 646                 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
 647                 IEEE80211_HW_SIGNAL_DBM |
 648                 IEEE80211_HW_SUPPORTS_PS |
 649                 IEEE80211_HW_PS_NULLFUNC_STACK |
 650                 IEEE80211_HW_SPECTRUM_MGMT |
 651                 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 652
 653         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
 654                  hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
 655
 656         if (AR_SREV_9160_10_OR_LATER(sc->sc_ah) || ath9k_modparam_nohwcrypt)
 657                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 658
 659         hw->wiphy->interface_modes =
 660                 BIT(NL80211_IFTYPE_P2P_GO) |
 661                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 662                 BIT(NL80211_IFTYPE_AP) |
 663                 BIT(NL80211_IFTYPE_WDS) |
 664                 BIT(NL80211_IFTYPE_STATION) |
 665                 BIT(NL80211_IFTYPE_ADHOC) |
 666                 BIT(NL80211_IFTYPE_MESH_POINT);
 667
 668         if (AR_SREV_5416(sc->sc_ah))
 669                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 670
 671         hw->queues = 4;
 672         hw->max_rates = 4;
 673         hw->channel_change_time = 5000;
 674         hw->max_listen_interval = 10;
 675         hw->max_rate_tries = 10;
 676         hw->sta_data_size = sizeof(struct ath_node);
 677         hw->vif_data_size = sizeof(struct ath_vif);
 678
 679 #ifdef CONFIG_ATH9K_RATE_CONTROL
 680         hw->rate_control_algorithm = "ath9k_rate_control";
 681 #endif
 682
 683         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ)
 684                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 685                         &sc->sbands[IEEE80211_BAND_2GHZ];
 686         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ)
 687                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 688                         &sc->sbands[IEEE80211_BAND_5GHZ];
 689
 690         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
 691                 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ)
 692                         setup_ht_cap(sc, &sc->sbands[IEEE80211_BAND_2GHZ].ht_cap);
 693                 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ)
 694                         setup_ht_cap(sc, &sc->sbands[IEEE80211_BAND_5GHZ].ht_cap);
 695         }
 696
 697         SET_IEEE80211_PERM_ADDR(hw, common->macaddr);
 698 }
 699
 700 int ath9k_init_device(u16 devid, struct ath_softc *sc, u16 subsysid,
 701                     const struct ath_bus_ops *bus_ops)
 702 {
 703         struct ieee80211_hw *hw = sc->hw;
 704         struct ath_wiphy *aphy = hw->priv;
 705         struct ath_common *common;
 706         struct ath_hw *ah;
 707         int error = 0;
 708         struct ath_regulatory *reg;
 709
 710         /* Bring up device */
 711         error = ath9k_init_softc(devid, sc, subsysid, bus_ops);
 712         if (error != 0)
 713                 goto error_init;
 714
 715         ah = sc->sc_ah;
 716         common = ath9k_hw_common(ah);
 717         ath9k_set_hw_capab(sc, hw);
 718
 719         /* Initialize regulatory */
 720         error = ath_regd_init(&common->regulatory, sc->hw->wiphy,
 721                               ath9k_reg_notifier);
 722         if (error)
 723                 goto error_regd;
 724
 725         reg = &common->regulatory;
 726
 727         /* Setup TX DMA */
 728         error = ath_tx_init(sc, ATH_TXBUF);
 729         if (error != 0)
 730                 goto error_tx;
 731
 732         /* Setup RX DMA */
 733         error = ath_rx_init(sc, ATH_RXBUF);
 734         if (error != 0)
 735                 goto error_rx;
 736
 737         ath9k_init_txpower_limits(sc);
 738
 739         /* Register with mac80211 */
 740         error = ieee80211_register_hw(hw);
 741         if (error)
 742                 goto error_register;
 743
 744         error = ath9k_init_debug(ah);
 745         if (error) {
 746                 ath_err(common, "Unable to create debugfs files\n");
 747                 goto error_world;
 748         }
 749
 750         /* Handle world regulatory */
 751         if (!ath_is_world_regd(reg)) {
 752                 error = regulatory_hint(hw->wiphy, reg->alpha2);
 753                 if (error)
 754                         goto error_world;
 755         }
 756
 757         INIT_WORK(&sc->hw_check_work, ath_hw_check);
 758         INIT_WORK(&sc->paprd_work, ath_paprd_calibrate);
 759         INIT_WORK(&sc->chan_work, ath9k_wiphy_chan_work);
 760         INIT_DELAYED_WORK(&sc->wiphy_work, ath9k_wiphy_work);
 761         sc->wiphy_scheduler_int = msecs_to_jiffies(500);
 762         aphy->last_rssi = ATH_RSSI_DUMMY_MARKER;
 763
 764         ath_init_leds(sc);
 765         ath_start_rfkill_poll(sc);
 766
 767         pm_qos_add_request(&sc->pm_qos_req, PM_QOS_CPU_DMA_LATENCY,
 768                            PM_QOS_DEFAULT_VALUE);
 769
 770         return 0;
 771
 772 error_world:
 773         ieee80211_unregister_hw(hw);
 774 error_register:
 775         ath_rx_cleanup(sc);
 776 error_rx:
 777         ath_tx_cleanup(sc);
 778 error_tx:
 779         /* Nothing */
 780 error_regd:
 781         ath9k_deinit_softc(sc);
 782 error_init:
 783         return error;
 784 }
 785
 786 /*****************************/
 787 /*     De-Initialization     */
 788 /*****************************/
 789
 790 static void ath9k_deinit_softc(struct ath_softc *sc)
 791 {
 792         int i = 0;
 793
 794         if (sc->sbands[IEEE80211_BAND_2GHZ].channels)
 795                 kfree(sc->sbands[IEEE80211_BAND_2GHZ].channels);
 796
 797         if (sc->sbands[IEEE80211_BAND_5GHZ].channels)
 798                 kfree(sc->sbands[IEEE80211_BAND_5GHZ].channels);
 799
 800         if ((sc->btcoex.no_stomp_timer) &&
 801             sc->sc_ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
 802                 ath_gen_timer_free(sc->sc_ah, sc->btcoex.no_stomp_timer);
 803
 804         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
 805                 if (ATH_TXQ_SETUP(sc, i))
 806                         ath_tx_cleanupq(sc, &sc->tx.txq[i]);
 807
 808         ath9k_hw_deinit(sc->sc_ah);
 809
 810         tasklet_kill(&sc->intr_tq);
 811         tasklet_kill(&sc->bcon_tasklet);
 812
 813         kfree(sc->sc_ah);
 814         sc->sc_ah = NULL;
 815 }
 816
 817 void ath9k_deinit_device(struct ath_softc *sc)
 818 {
 819         struct ieee80211_hw *hw = sc->hw;
 820         int i = 0;
 821
 822         ath9k_ps_wakeup(sc);
 823
 824         wiphy_rfkill_stop_polling(sc->hw->wiphy);
 825         ath_deinit_leds(sc);
 826
 827         for (i = 0; i < sc->num_sec_wiphy; i++) {
 828                 struct ath_wiphy *aphy = sc->sec_wiphy[i];
 829                 if (aphy == NULL)
 830                         continue;
 831                 sc->sec_wiphy[i] = NULL;
 832                 ieee80211_unregister_hw(aphy->hw);
 833                 ieee80211_free_hw(aphy->hw);
 834         }
 835
 836         ieee80211_unregister_hw(hw);
 837         pm_qos_remove_request(&sc->pm_qos_req);
 838         ath_rx_cleanup(sc);
 839         ath_tx_cleanup(sc);
 840         ath9k_deinit_softc(sc);
 841         kfree(sc->sec_wiphy);
 842 }
 843
 844 void ath_descdma_cleanup(struct ath_softc *sc,
 845                          struct ath_descdma *dd,
 846                          struct list_head *head)
 847 {
 848         dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
 849                           dd->dd_desc_paddr);
 850
 851         INIT_LIST_HEAD(head);
 852         kfree(dd->dd_bufptr);
 853         memset(dd, 0, sizeof(*dd));
 854 }
 855
 856 /************************/
 857 /*     Module Hooks     */
 858 /************************/
 859
 860 static int __init ath9k_init(void)
 861 {
 862         int error;
 863
 864         /* Register rate control algorithm */
 865         error = ath_rate_control_register();
 866         if (error != 0) {
 867                 printk(KERN_ERR
 868                         "ath9k: Unable to register rate control "
 869                         "algorithm: %d\n",
 870                         error);
 871                 goto err_out;
 872         }
 873
 874         error = ath_pci_init();
 875         if (error < 0) {
 876                 printk(KERN_ERR
 877                         "ath9k: No PCI devices found, driver not installed.\n");
 878                 error = -ENODEV;
 879                 goto err_rate_unregister;
 880         }
 881
 882         error = ath_ahb_init();
 883         if (error < 0) {
 884                 error = -ENODEV;
 885                 goto err_pci_exit;
 886         }
 887
 888         return 0;
 889
 890  err_pci_exit:
 891         ath_pci_exit();
 892
 893  err_rate_unregister:
 894         ath_rate_control_unregister();
 895  err_out:
 896         return error;
 897 }
 898 module_init(ath9k_init);
 899
 900 static void __exit ath9k_exit(void)
 901 {
 902         is_ath9k_unloaded = true;
 903         ath_ahb_exit();
 904         ath_pci_exit();
 905         ath_rate_control_unregister();
 906         printk(KERN_INFO "%s: Driver unloaded\n", dev_info);
 907 }
 908 module_exit(ath9k_exit);