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 /* mac80211 and PCI callbacks */
  18
  19 #include <linux/nl80211.h>
  20 #include "core.h"
  21 #include "reg.h"
  22
  23 #define ATH_PCI_VERSION "0.1"
  24
  25 static char *dev_info = "ath9k";
  26
  27 MODULE_AUTHOR("Atheros Communications");
  28 MODULE_DESCRIPTION("Support for Atheros 802.11n wireless LAN cards.");
  29 MODULE_SUPPORTED_DEVICE("Atheros 802.11n WLAN cards");
  30 MODULE_LICENSE("Dual BSD/GPL");
  31
  32 static struct pci_device_id ath_pci_id_table[] __devinitdata = {
  33         { PCI_VDEVICE(ATHEROS, 0x0023) }, /* PCI   */
  34         { PCI_VDEVICE(ATHEROS, 0x0024) }, /* PCI-E */
  35         { PCI_VDEVICE(ATHEROS, 0x0027) }, /* PCI   */
  36         { PCI_VDEVICE(ATHEROS, 0x0029) }, /* PCI   */
  37         { PCI_VDEVICE(ATHEROS, 0x002A) }, /* PCI-E */
  38         { 0 }
  39 };
  40
  41 static void ath_detach(struct ath_softc *sc);
  42
  43 static int ath_get_channel(struct ath_softc *sc,
  44                            struct ieee80211_channel *chan)
  45 {
  46         int i;
  47
  48         for (i = 0; i < sc->sc_ah->ah_nchan; i++) {
  49                 if (sc->sc_ah->ah_channels[i].channel == chan->center_freq)
  50                         return i;
  51         }
  52
  53         return -1;
  54 }
  55
  56 static u32 ath_get_extchanmode(struct ath_softc *sc,
  57                                      struct ieee80211_channel *chan)
  58 {
  59         u32 chanmode = 0;
  60         u8 ext_chan_offset = sc->sc_ht_info.ext_chan_offset;
  61         enum ath9k_ht_macmode tx_chan_width = sc->sc_ht_info.tx_chan_width;
  62
  63         switch (chan->band) {
  64         case IEEE80211_BAND_2GHZ:
  65                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE) &&
  66                     (tx_chan_width == ATH9K_HT_MACMODE_20))
  67                         chanmode = CHANNEL_G_HT20;
  68                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) &&
  69                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
  70                         chanmode = CHANNEL_G_HT40PLUS;
  71                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) &&
  72                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
  73                         chanmode = CHANNEL_G_HT40MINUS;
  74                 break;
  75         case IEEE80211_BAND_5GHZ:
  76                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE) &&
  77                     (tx_chan_width == ATH9K_HT_MACMODE_20))
  78                         chanmode = CHANNEL_A_HT20;
  79                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) &&
  80                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
  81                         chanmode = CHANNEL_A_HT40PLUS;
  82                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) &&
  83                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
  84                         chanmode = CHANNEL_A_HT40MINUS;
  85                 break;
  86         default:
  87                 break;
  88         }
  89
  90         return chanmode;
  91 }
  92
  93
  94 static int ath_setkey_tkip(struct ath_softc *sc,
  95                            struct ieee80211_key_conf *key,
  96                            struct ath9k_keyval *hk,
  97                            const u8 *addr)
  98 {
  99         u8 *key_rxmic = NULL;
 100         u8 *key_txmic = NULL;
 101
 102         key_txmic = key->key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY;
 103         key_rxmic = key->key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY;
 104
 105         if (addr == NULL) {
 106                 /* Group key installation */
 107                 memcpy(hk->kv_mic,  key_rxmic, sizeof(hk->kv_mic));
 108                 return ath_keyset(sc, key->keyidx, hk, addr);
 109         }
 110         if (!sc->sc_splitmic) {
 111                 /*
 112                  * data key goes at first index,
 113                  * the hal handles the MIC keys at index+64.
 114                  */
 115                 memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
 116                 memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic));
 117                 return ath_keyset(sc, key->keyidx, hk, addr);
 118         }
 119         /*
 120          * TX key goes at first index, RX key at +32.
 121          * The hal handles the MIC keys at index+64.
 122          */
 123         memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
 124         if (!ath_keyset(sc, key->keyidx, hk, NULL)) {
 125                 /* Txmic entry failed. No need to proceed further */
 126                 DPRINTF(sc, ATH_DBG_KEYCACHE,
 127                         "%s Setting TX MIC Key Failed\n", __func__);
 128                 return 0;
 129         }
 130
 131         memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
 132         /* XXX delete tx key on failure? */
 133         return ath_keyset(sc, key->keyidx+32, hk, addr);
 134 }
 135
 136 static int ath_key_config(struct ath_softc *sc,
 137                           const u8 *addr,
 138                           struct ieee80211_key_conf *key)
 139 {
 140         struct ieee80211_vif *vif;
 141         struct ath9k_keyval hk;
 142         const u8 *mac = NULL;
 143         int ret = 0;
 144         enum nl80211_iftype opmode;
 145
 146         memset(&hk, 0, sizeof(hk));
 147
 148         switch (key->alg) {
 149         case ALG_WEP:
 150                 hk.kv_type = ATH9K_CIPHER_WEP;
 151                 break;
 152         case ALG_TKIP:
 153                 hk.kv_type = ATH9K_CIPHER_TKIP;
 154                 break;
 155         case ALG_CCMP:
 156                 hk.kv_type = ATH9K_CIPHER_AES_CCM;
 157                 break;
 158         default:
 159                 return -EINVAL;
 160         }
 161
 162         hk.kv_len  = key->keylen;
 163         memcpy(hk.kv_val, key->key, key->keylen);
 164
 165         if (!sc->sc_vaps[0])
 166                 return -EIO;
 167
 168         vif = sc->sc_vaps[0];
 169         opmode = vif->type;
 170
 171         /*
 172          *  Strategy:
 173          *   For _M_STA mc tx, we will not setup a key at all since we never
 174          *   tx mc.
 175          *   _M_STA mc rx, we will use the keyID.
 176          *   for _M_IBSS mc tx, we will use the keyID, and no macaddr.
 177          *   for _M_IBSS mc rx, we will alloc a slot and plumb the mac of the
 178          *   peer node. BUT we will plumb a cleartext key so that we can do
 179          *   perSta default key table lookup in software.
 180          */
 181         if (is_broadcast_ether_addr(addr)) {
 182                 switch (opmode) {
 183                 case NL80211_IFTYPE_STATION:
 184                         /* default key:  could be group WPA key
 185                          * or could be static WEP key */
 186                         mac = NULL;
 187                         break;
 188                 case NL80211_IFTYPE_ADHOC:
 189                         break;
 190                 case NL80211_IFTYPE_AP:
 191                         break;
 192                 default:
 193                         ASSERT(0);
 194                         break;
 195                 }
 196         } else {
 197                 mac = addr;
 198         }
 199
 200         if (key->alg == ALG_TKIP)
 201                 ret = ath_setkey_tkip(sc, key, &hk, mac);
 202         else
 203                 ret = ath_keyset(sc, key->keyidx, &hk, mac);
 204
 205         if (!ret)
 206                 return -EIO;
 207
 208         return 0;
 209 }
 210
 211 static void ath_key_delete(struct ath_softc *sc, struct ieee80211_key_conf *key)
 212 {
 213         int freeslot;
 214
 215         freeslot = (key->keyidx >= 4) ? 1 : 0;
 216         ath_key_reset(sc, key->keyidx, freeslot);
 217 }
 218
 219 static void setup_ht_cap(struct ieee80211_sta_ht_cap *ht_info)
 220 {
 221 #define ATH9K_HT_CAP_MAXRXAMPDU_65536 0x3       /* 2 ^ 16 */
 222 #define ATH9K_HT_CAP_MPDUDENSITY_8 0x6          /* 8 usec */
 223
 224         ht_info->ht_supported = true;
 225         ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 226                        IEEE80211_HT_CAP_SM_PS |
 227                        IEEE80211_HT_CAP_SGI_40 |
 228                        IEEE80211_HT_CAP_DSSSCCK40;
 229
 230         ht_info->ampdu_factor = ATH9K_HT_CAP_MAXRXAMPDU_65536;
 231         ht_info->ampdu_density = ATH9K_HT_CAP_MPDUDENSITY_8;
 232         /* set up supported mcs set */
 233         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 234         ht_info->mcs.rx_mask[0] = 0xff;
 235         ht_info->mcs.rx_mask[1] = 0xff;
 236         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 237 }
 238
 239 static int ath_rate2idx(struct ath_softc *sc, int rate)
 240 {
 241         int i = 0, cur_band, n_rates;
 242         struct ieee80211_hw *hw = sc->hw;
 243
 244         cur_band = hw->conf.channel->band;
 245         n_rates = sc->sbands[cur_band].n_bitrates;
 246
 247         for (i = 0; i < n_rates; i++) {
 248                 if (sc->sbands[cur_band].bitrates[i].bitrate == rate)
 249                         break;
 250         }
 251
 252         /*
 253          * NB:mac80211 validates rx rate index against the supported legacy rate
 254          * index only (should be done against ht rates also), return the highest
 255          * legacy rate index for rx rate which does not match any one of the
 256          * supported basic and extended rates to make mac80211 happy.
 257          * The following hack will be cleaned up once the issue with
 258          * the rx rate index validation in mac80211 is fixed.
 259          */
 260         if (i == n_rates)
 261                 return n_rates - 1;
 262         return i;
 263 }
 264
 265 static void ath9k_rx_prepare(struct ath_softc *sc,
 266                              struct sk_buff *skb,
 267                              struct ath_recv_status *status,
 268                              struct ieee80211_rx_status *rx_status)
 269 {
 270         struct ieee80211_hw *hw = sc->hw;
 271         struct ieee80211_channel *curchan = hw->conf.channel;
 272
 273         memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
 274
 275         rx_status->mactime = status->tsf;
 276         rx_status->band = curchan->band;
 277         rx_status->freq =  curchan->center_freq;
 278         rx_status->noise = sc->sc_ani.sc_noise_floor;
 279         rx_status->signal = rx_status->noise + status->rssi;
 280         rx_status->rate_idx = ath_rate2idx(sc, (status->rateKbps / 100));
 281         rx_status->antenna = status->antenna;
 282
 283         /* at 45 you will be able to use MCS 15 reliably. A more elaborate
 284          * scheme can be used here but it requires tables of SNR/throughput for
 285          * each possible mode used. */
 286         rx_status->qual = status->rssi * 100 / 45;
 287
 288         /* rssi can be more than 45 though, anything above that
 289          * should be considered at 100% */
 290         if (rx_status->qual > 100)
 291                 rx_status->qual = 100;
 292
 293         if (status->flags & ATH_RX_MIC_ERROR)
 294                 rx_status->flag |= RX_FLAG_MMIC_ERROR;
 295         if (status->flags & ATH_RX_FCS_ERROR)
 296                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
 297
 298         rx_status->flag |= RX_FLAG_TSFT;
 299 }
 300
 301 static void ath9k_ht_conf(struct ath_softc *sc,
 302                           struct ieee80211_bss_conf *bss_conf)
 303 {
 304         struct ath_ht_info *ht_info = &sc->sc_ht_info;
 305
 306         if (sc->hw->conf.ht.enabled) {
 307                 ht_info->ext_chan_offset = bss_conf->ht.secondary_channel_offset;
 308
 309                 if (bss_conf->ht.width_40_ok)
 310                         ht_info->tx_chan_width = ATH9K_HT_MACMODE_2040;
 311                 else
 312                         ht_info->tx_chan_width = ATH9K_HT_MACMODE_20;
 313
 314                 ath9k_hw_set11nmac2040(sc->sc_ah, ht_info->tx_chan_width);
 315         }
 316 }
 317
 318 static void ath9k_bss_assoc_info(struct ath_softc *sc,
 319                                  struct ieee80211_vif *vif,
 320                                  struct ieee80211_bss_conf *bss_conf)
 321 {
 322         struct ieee80211_hw *hw = sc->hw;
 323         struct ieee80211_channel *curchan = hw->conf.channel;
 324         struct ath_vap *avp = (void *)vif->drv_priv;
 325         int pos;
 326
 327         if (bss_conf->assoc) {
 328                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Bss Info ASSOC %d\n",
 329                         __func__,
 330                         bss_conf->aid);
 331
 332                 /* New association, store aid */
 333                 if (avp->av_opmode == ATH9K_M_STA) {
 334                         sc->sc_curaid = bss_conf->aid;
 335                         ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
 336                                                sc->sc_curaid);
 337                 }
 338
 339                 /* Configure the beacon */
 340                 ath_beacon_config(sc, 0);
 341                 sc->sc_flags |= SC_OP_BEACONS;
 342
 343                 /* Reset rssi stats */
 344                 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER;
 345                 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER;
 346                 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER;
 347                 sc->sc_halstats.ns_avgtxrate = ATH_RATE_DUMMY_MARKER;
 348
 349                 /* Update chainmask */
 350                 ath_update_chainmask(sc, hw->conf.ht.enabled);
 351
 352                 DPRINTF(sc, ATH_DBG_CONFIG,
 353                         "%s: bssid %pM aid 0x%x\n",
 354                         __func__,
 355                         sc->sc_curbssid, sc->sc_curaid);
 356
 357                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
 358                         __func__,
 359                         curchan->center_freq);
 360
 361                 pos = ath_get_channel(sc, curchan);
 362                 if (pos == -1) {
 363                         DPRINTF(sc, ATH_DBG_FATAL,
 364                                 "%s: Invalid channel\n", __func__);
 365                         return;
 366                 }
 367
 368                 if (hw->conf.ht.enabled)
 369                         sc->sc_ah->ah_channels[pos].chanmode =
 370                                 ath_get_extchanmode(sc, curchan);
 371                 else
 372                         sc->sc_ah->ah_channels[pos].chanmode =
 373                                 (curchan->band == IEEE80211_BAND_2GHZ) ?
 374                                 CHANNEL_G : CHANNEL_A;
 375
 376                 /* set h/w channel */
 377                 if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
 378                         DPRINTF(sc, ATH_DBG_FATAL,
 379                                 "%s: Unable to set channel\n",
 380                                 __func__);
 381
 382                 ath_rate_newstate(sc, avp);
 383                 /* Update ratectrl about the new state */
 384                 ath_rc_node_update(hw, avp->rc_node);
 385
 386                 /* Start ANI */
 387                 mod_timer(&sc->sc_ani.timer,
 388                         jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
 389
 390         } else {
 391                 DPRINTF(sc, ATH_DBG_CONFIG,
 392                 "%s: Bss Info DISSOC\n", __func__);
 393                 sc->sc_curaid = 0;
 394         }
 395 }
 396
 397 void ath_get_beaconconfig(struct ath_softc *sc,
 398                           int if_id,
 399                           struct ath_beacon_config *conf)
 400 {
 401         struct ieee80211_hw *hw = sc->hw;
 402
 403         /* fill in beacon config data */
 404
 405         conf->beacon_interval = hw->conf.beacon_int;
 406         conf->listen_interval = 100;
 407         conf->dtim_count = 1;
 408         conf->bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf->listen_interval;
 409 }
 410
 411 void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
 412                      struct ath_xmit_status *tx_status)
 413 {
 414         struct ieee80211_hw *hw = sc->hw;
 415         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 416
 417         DPRINTF(sc, ATH_DBG_XMIT,
 418                 "%s: TX complete: skb: %p\n", __func__, skb);
 419
 420         ieee80211_tx_info_clear_status(tx_info);
 421         if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK ||
 422                 tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
 423                 /* free driver's private data area of tx_info, XXX: HACK! */
 424                 if (tx_info->control.vif != NULL)
 425                         kfree(tx_info->control.vif);
 426                         tx_info->control.vif = NULL;
 427         }
 428
 429         if (tx_status->flags & ATH_TX_BAR) {
 430                 tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
 431                 tx_status->flags &= ~ATH_TX_BAR;
 432         }
 433
 434         if (!(tx_status->flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) {
 435                 /* Frame was ACKed */
 436                 tx_info->flags |= IEEE80211_TX_STAT_ACK;
 437         }
 438
 439         tx_info->status.rates[0].count = tx_status->retries + 1;
 440
 441         ieee80211_tx_status(hw, skb);
 442 }
 443
 444 int _ath_rx_indicate(struct ath_softc *sc,
 445                      struct sk_buff *skb,
 446                      struct ath_recv_status *status,
 447                      u16 keyix)
 448 {
 449         struct ieee80211_hw *hw = sc->hw;
 450         struct ieee80211_rx_status rx_status;
 451         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 452         int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 453         int padsize;
 454
 455         /* see if any padding is done by the hw and remove it */
 456         if (hdrlen & 3) {
 457                 padsize = hdrlen % 4;
 458                 memmove(skb->data + padsize, skb->data, hdrlen);
 459                 skb_pull(skb, padsize);
 460         }
 461
 462         /* Prepare rx status */
 463         ath9k_rx_prepare(sc, skb, status, &rx_status);
 464
 465         if (!(keyix == ATH9K_RXKEYIX_INVALID) &&
 466             !(status->flags & ATH_RX_DECRYPT_ERROR)) {
 467                 rx_status.flag |= RX_FLAG_DECRYPTED;
 468         } else if ((le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_PROTECTED)
 469                    && !(status->flags & ATH_RX_DECRYPT_ERROR)
 470                    && skb->len >= hdrlen + 4) {
 471                 keyix = skb->data[hdrlen + 3] >> 6;
 472
 473                 if (test_bit(keyix, sc->sc_keymap))
 474                         rx_status.flag |= RX_FLAG_DECRYPTED;
 475         }
 476
 477         __ieee80211_rx(hw, skb, &rx_status);
 478
 479         return 0;
 480 }
 481
 482 /********************************/
 483 /*       LED functions          */
 484 /********************************/
 485
 486 static void ath_led_brightness(struct led_classdev *led_cdev,
 487                                enum led_brightness brightness)
 488 {
 489         struct ath_led *led = container_of(led_cdev, struct ath_led, led_cdev);
 490         struct ath_softc *sc = led->sc;
 491
 492         switch (brightness) {
 493         case LED_OFF:
 494                 if (led->led_type == ATH_LED_ASSOC ||
 495                     led->led_type == ATH_LED_RADIO)
 496                         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
 497                 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN,
 498                                 (led->led_type == ATH_LED_RADIO) ? 1 :
 499                                 !!(sc->sc_flags & SC_OP_LED_ASSOCIATED));
 500                 break;
 501         case LED_FULL:
 502                 if (led->led_type == ATH_LED_ASSOC)
 503                         sc->sc_flags |= SC_OP_LED_ASSOCIATED;
 504                 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 0);
 505                 break;
 506         default:
 507                 break;
 508         }
 509 }
 510
 511 static int ath_register_led(struct ath_softc *sc, struct ath_led *led,
 512                             char *trigger)
 513 {
 514         int ret;
 515
 516         led->sc = sc;
 517         led->led_cdev.name = led->name;
 518         led->led_cdev.default_trigger = trigger;
 519         led->led_cdev.brightness_set = ath_led_brightness;
 520
 521         ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->led_cdev);
 522         if (ret)
 523                 DPRINTF(sc, ATH_DBG_FATAL,
 524                         "Failed to register led:%s", led->name);
 525         else
 526                 led->registered = 1;
 527         return ret;
 528 }
 529
 530 static void ath_unregister_led(struct ath_led *led)
 531 {
 532         if (led->registered) {
 533                 led_classdev_unregister(&led->led_cdev);
 534                 led->registered = 0;
 535         }
 536 }
 537
 538 static void ath_deinit_leds(struct ath_softc *sc)
 539 {
 540         ath_unregister_led(&sc->assoc_led);
 541         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
 542         ath_unregister_led(&sc->tx_led);
 543         ath_unregister_led(&sc->rx_led);
 544         ath_unregister_led(&sc->radio_led);
 545         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
 546 }
 547
 548 static void ath_init_leds(struct ath_softc *sc)
 549 {
 550         char *trigger;
 551         int ret;
 552
 553         /* Configure gpio 1 for output */
 554         ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
 555                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 556         /* LED off, active low */
 557         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
 558
 559         trigger = ieee80211_get_radio_led_name(sc->hw);
 560         snprintf(sc->radio_led.name, sizeof(sc->radio_led.name),
 561                 "ath9k-%s:radio", wiphy_name(sc->hw->wiphy));
 562         ret = ath_register_led(sc, &sc->radio_led, trigger);
 563         sc->radio_led.led_type = ATH_LED_RADIO;
 564         if (ret)
 565                 goto fail;
 566
 567         trigger = ieee80211_get_assoc_led_name(sc->hw);
 568         snprintf(sc->assoc_led.name, sizeof(sc->assoc_led.name),
 569                 "ath9k-%s:assoc", wiphy_name(sc->hw->wiphy));
 570         ret = ath_register_led(sc, &sc->assoc_led, trigger);
 571         sc->assoc_led.led_type = ATH_LED_ASSOC;
 572         if (ret)
 573                 goto fail;
 574
 575         trigger = ieee80211_get_tx_led_name(sc->hw);
 576         snprintf(sc->tx_led.name, sizeof(sc->tx_led.name),
 577                 "ath9k-%s:tx", wiphy_name(sc->hw->wiphy));
 578         ret = ath_register_led(sc, &sc->tx_led, trigger);
 579         sc->tx_led.led_type = ATH_LED_TX;
 580         if (ret)
 581                 goto fail;
 582
 583         trigger = ieee80211_get_rx_led_name(sc->hw);
 584         snprintf(sc->rx_led.name, sizeof(sc->rx_led.name),
 585                 "ath9k-%s:rx", wiphy_name(sc->hw->wiphy));
 586         ret = ath_register_led(sc, &sc->rx_led, trigger);
 587         sc->rx_led.led_type = ATH_LED_RX;
 588         if (ret)
 589                 goto fail;
 590
 591         return;
 592
 593 fail:
 594         ath_deinit_leds(sc);
 595 }
 596
 597 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
 598
 599 /*******************/
 600 /*      Rfkill     */
 601 /*******************/
 602
 603 static void ath_radio_enable(struct ath_softc *sc)
 604 {
 605         struct ath_hal *ah = sc->sc_ah;
 606         int status;
 607
 608         spin_lock_bh(&sc->sc_resetlock);
 609         if (!ath9k_hw_reset(ah, ah->ah_curchan,
 610                             sc->sc_ht_info.tx_chan_width,
 611                             sc->sc_tx_chainmask,
 612                             sc->sc_rx_chainmask,
 613                             sc->sc_ht_extprotspacing,
 614                             false, &status)) {
 615                 DPRINTF(sc, ATH_DBG_FATAL,
 616                         "%s: unable to reset channel %u (%uMhz) "
 617                         "flags 0x%x hal status %u\n", __func__,
 618                         ath9k_hw_mhz2ieee(ah,
 619                                           ah->ah_curchan->channel,
 620                                           ah->ah_curchan->channelFlags),
 621                         ah->ah_curchan->channel,
 622                         ah->ah_curchan->channelFlags, status);
 623         }
 624         spin_unlock_bh(&sc->sc_resetlock);
 625
 626         ath_update_txpow(sc);
 627         if (ath_startrecv(sc) != 0) {
 628                 DPRINTF(sc, ATH_DBG_FATAL,
 629                         "%s: unable to restart recv logic\n", __func__);
 630                 return;
 631         }
 632
 633         if (sc->sc_flags & SC_OP_BEACONS)
 634                 ath_beacon_config(sc, ATH_IF_ID_ANY);   /* restart beacons */
 635
 636         /* Re-Enable  interrupts */
 637         ath9k_hw_set_interrupts(ah, sc->sc_imask);
 638
 639         /* Enable LED */
 640         ath9k_hw_cfg_output(ah, ATH_LED_PIN,
 641                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 642         ath9k_hw_set_gpio(ah, ATH_LED_PIN, 0);
 643
 644         ieee80211_wake_queues(sc->hw);
 645 }
 646
 647 static void ath_radio_disable(struct ath_softc *sc)
 648 {
 649         struct ath_hal *ah = sc->sc_ah;
 650         int status;
 651
 652
 653         ieee80211_stop_queues(sc->hw);
 654
 655         /* Disable LED */
 656         ath9k_hw_set_gpio(ah, ATH_LED_PIN, 1);
 657         ath9k_hw_cfg_gpio_input(ah, ATH_LED_PIN);
 658
 659         /* Disable interrupts */
 660         ath9k_hw_set_interrupts(ah, 0);
 661
 662         ath_draintxq(sc, false);        /* clear pending tx frames */
 663         ath_stoprecv(sc);               /* turn off frame recv */
 664         ath_flushrecv(sc);              /* flush recv queue */
 665
 666         spin_lock_bh(&sc->sc_resetlock);
 667         if (!ath9k_hw_reset(ah, ah->ah_curchan,
 668                             sc->sc_ht_info.tx_chan_width,
 669                             sc->sc_tx_chainmask,
 670                             sc->sc_rx_chainmask,
 671                             sc->sc_ht_extprotspacing,
 672                             false, &status)) {
 673                 DPRINTF(sc, ATH_DBG_FATAL,
 674                         "%s: unable to reset channel %u (%uMhz) "
 675                         "flags 0x%x hal status %u\n", __func__,
 676                         ath9k_hw_mhz2ieee(ah,
 677                                 ah->ah_curchan->channel,
 678                                 ah->ah_curchan->channelFlags),
 679                         ah->ah_curchan->channel,
 680                         ah->ah_curchan->channelFlags, status);
 681         }
 682         spin_unlock_bh(&sc->sc_resetlock);
 683
 684         ath9k_hw_phy_disable(ah);
 685         ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP);
 686 }
 687
 688 static bool ath_is_rfkill_set(struct ath_softc *sc)
 689 {
 690         struct ath_hal *ah = sc->sc_ah;
 691
 692         return ath9k_hw_gpio_get(ah, ah->ah_rfkill_gpio) ==
 693                                   ah->ah_rfkill_polarity;
 694 }
 695
 696 /* h/w rfkill poll function */
 697 static void ath_rfkill_poll(struct work_struct *work)
 698 {
 699         struct ath_softc *sc = container_of(work, struct ath_softc,
 700                                             rf_kill.rfkill_poll.work);
 701         bool radio_on;
 702
 703         if (sc->sc_flags & SC_OP_INVALID)
 704                 return;
 705
 706         radio_on = !ath_is_rfkill_set(sc);
 707
 708         /*
 709          * enable/disable radio only when there is a
 710          * state change in RF switch
 711          */
 712         if (radio_on == !!(sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED)) {
 713                 enum rfkill_state state;
 714
 715                 if (sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED) {
 716                         state = radio_on ? RFKILL_STATE_SOFT_BLOCKED
 717                                 : RFKILL_STATE_HARD_BLOCKED;
 718                 } else if (radio_on) {
 719                         ath_radio_enable(sc);
 720                         state = RFKILL_STATE_UNBLOCKED;
 721                 } else {
 722                         ath_radio_disable(sc);
 723                         state = RFKILL_STATE_HARD_BLOCKED;
 724                 }
 725
 726                 if (state == RFKILL_STATE_HARD_BLOCKED)
 727                         sc->sc_flags |= SC_OP_RFKILL_HW_BLOCKED;
 728                 else
 729                         sc->sc_flags &= ~SC_OP_RFKILL_HW_BLOCKED;
 730
 731                 rfkill_force_state(sc->rf_kill.rfkill, state);
 732         }
 733
 734         queue_delayed_work(sc->hw->workqueue, &sc->rf_kill.rfkill_poll,
 735                            msecs_to_jiffies(ATH_RFKILL_POLL_INTERVAL));
 736 }
 737
 738 /* s/w rfkill handler */
 739 static int ath_sw_toggle_radio(void *data, enum rfkill_state state)
 740 {
 741         struct ath_softc *sc = data;
 742
 743         switch (state) {
 744         case RFKILL_STATE_SOFT_BLOCKED:
 745                 if (!(sc->sc_flags & (SC_OP_RFKILL_HW_BLOCKED |
 746                     SC_OP_RFKILL_SW_BLOCKED)))
 747                         ath_radio_disable(sc);
 748                 sc->sc_flags |= SC_OP_RFKILL_SW_BLOCKED;
 749                 return 0;
 750         case RFKILL_STATE_UNBLOCKED:
 751                 if ((sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED)) {
 752                         sc->sc_flags &= ~SC_OP_RFKILL_SW_BLOCKED;
 753                         if (sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED) {
 754                                 DPRINTF(sc, ATH_DBG_FATAL, "Can't turn on the"
 755                                         "radio as it is disabled by h/w \n");
 756                                 return -EPERM;
 757                         }
 758                         ath_radio_enable(sc);
 759                 }
 760                 return 0;
 761         default:
 762                 return -EINVAL;
 763         }
 764 }
 765
 766 /* Init s/w rfkill */
 767 static int ath_init_sw_rfkill(struct ath_softc *sc)
 768 {
 769         sc->rf_kill.rfkill = rfkill_allocate(wiphy_dev(sc->hw->wiphy),
 770                                              RFKILL_TYPE_WLAN);
 771         if (!sc->rf_kill.rfkill) {
 772                 DPRINTF(sc, ATH_DBG_FATAL, "Failed to allocate rfkill\n");
 773                 return -ENOMEM;
 774         }
 775
 776         snprintf(sc->rf_kill.rfkill_name, sizeof(sc->rf_kill.rfkill_name),
 777                 "ath9k-%s:rfkill", wiphy_name(sc->hw->wiphy));
 778         sc->rf_kill.rfkill->name = sc->rf_kill.rfkill_name;
 779         sc->rf_kill.rfkill->data = sc;
 780         sc->rf_kill.rfkill->toggle_radio = ath_sw_toggle_radio;
 781         sc->rf_kill.rfkill->state = RFKILL_STATE_UNBLOCKED;
 782         sc->rf_kill.rfkill->user_claim_unsupported = 1;
 783
 784         return 0;
 785 }
 786
 787 /* Deinitialize rfkill */
 788 static void ath_deinit_rfkill(struct ath_softc *sc)
 789 {
 790         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
 791                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
 792
 793         if (sc->sc_flags & SC_OP_RFKILL_REGISTERED) {
 794                 rfkill_unregister(sc->rf_kill.rfkill);
 795                 sc->sc_flags &= ~SC_OP_RFKILL_REGISTERED;
 796                 sc->rf_kill.rfkill = NULL;
 797         }
 798 }
 799
 800 static int ath_start_rfkill_poll(struct ath_softc *sc)
 801 {
 802         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
 803                 queue_delayed_work(sc->hw->workqueue,
 804                                    &sc->rf_kill.rfkill_poll, 0);
 805
 806         if (!(sc->sc_flags & SC_OP_RFKILL_REGISTERED)) {
 807                 if (rfkill_register(sc->rf_kill.rfkill)) {
 808                         DPRINTF(sc, ATH_DBG_FATAL,
 809                                 "Unable to register rfkill\n");
 810                         rfkill_free(sc->rf_kill.rfkill);
 811
 812                         /* Deinitialize the device */
 813                         ath_detach(sc);
 814                         if (sc->pdev->irq)
 815                                 free_irq(sc->pdev->irq, sc);
 816                         pci_iounmap(sc->pdev, sc->mem);
 817                         pci_release_region(sc->pdev, 0);
 818                         pci_disable_device(sc->pdev);
 819                         ieee80211_free_hw(sc->hw);
 820                         return -EIO;
 821                 } else {
 822                         sc->sc_flags |= SC_OP_RFKILL_REGISTERED;
 823                 }
 824         }
 825
 826         return 0;
 827 }
 828 #endif /* CONFIG_RFKILL */
 829
 830 static void ath_detach(struct ath_softc *sc)
 831 {
 832         struct ieee80211_hw *hw = sc->hw;
 833         int i = 0;
 834
 835         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach ATH hw\n", __func__);
 836
 837 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
 838         ath_deinit_rfkill(sc);
 839 #endif
 840         ath_deinit_leds(sc);
 841
 842         ieee80211_unregister_hw(hw);
 843
 844         ath_rate_control_unregister();
 845         ath_rate_detach(sc->sc_rc);
 846
 847         ath_rx_cleanup(sc);
 848         ath_tx_cleanup(sc);
 849
 850         tasklet_kill(&sc->intr_tq);
 851         tasklet_kill(&sc->bcon_tasklet);
 852
 853         if (!(sc->sc_flags & SC_OP_INVALID))
 854                 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
 855
 856         /* cleanup tx queues */
 857         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
 858                 if (ATH_TXQ_SETUP(sc, i))
 859                         ath_tx_cleanupq(sc, &sc->sc_txq[i]);
 860
 861         ath9k_hw_detach(sc->sc_ah);
 862 }
 863
 864 static int ath_attach(u16 devid, struct ath_softc *sc)
 865 {
 866         struct ieee80211_hw *hw = sc->hw;
 867         int error = 0;
 868
 869         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach ATH hw\n", __func__);
 870
 871         error = ath_init(devid, sc);
 872         if (error != 0)
 873                 return error;
 874
 875         /* get mac address from hardware and set in mac80211 */
 876
 877         SET_IEEE80211_PERM_ADDR(hw, sc->sc_myaddr);
 878
 879         hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
 880                 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
 881                 IEEE80211_HW_SIGNAL_DBM |
 882                 IEEE80211_HW_AMPDU_AGGREGATION;
 883
 884         hw->wiphy->interface_modes =
 885                 BIT(NL80211_IFTYPE_AP) |
 886                 BIT(NL80211_IFTYPE_STATION) |
 887                 BIT(NL80211_IFTYPE_ADHOC);
 888
 889         hw->queues = 4;
 890         hw->sta_data_size = sizeof(struct ath_node);
 891         hw->vif_data_size = sizeof(struct ath_vap);
 892
 893         /* Register rate control */
 894         hw->rate_control_algorithm = "ath9k_rate_control";
 895         error = ath_rate_control_register();
 896         if (error != 0) {
 897                 DPRINTF(sc, ATH_DBG_FATAL,
 898                         "%s: Unable to register rate control "
 899                         "algorithm:%d\n", __func__, error);
 900                 ath_rate_control_unregister();
 901                 goto bad;
 902         }
 903
 904         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) {
 905                 setup_ht_cap(&sc->sbands[IEEE80211_BAND_2GHZ].ht_cap);
 906                 if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes))
 907                         setup_ht_cap(&sc->sbands[IEEE80211_BAND_5GHZ].ht_cap);
 908         }
 909
 910         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &sc->sbands[IEEE80211_BAND_2GHZ];
 911         if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes))
 912                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 913                         &sc->sbands[IEEE80211_BAND_5GHZ];
 914
 915         /* initialize tx/rx engine */
 916         error = ath_tx_init(sc, ATH_TXBUF);
 917         if (error != 0)
 918                 goto detach;
 919
 920         error = ath_rx_init(sc, ATH_RXBUF);
 921         if (error != 0)
 922                 goto detach;
 923
 924 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
 925         /* Initialze h/w Rfkill */
 926         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
 927                 INIT_DELAYED_WORK(&sc->rf_kill.rfkill_poll, ath_rfkill_poll);
 928
 929         /* Initialize s/w rfkill */
 930         if (ath_init_sw_rfkill(sc))
 931                 goto detach;
 932 #endif
 933
 934         error = ieee80211_register_hw(hw);
 935         if (error != 0) {
 936                 ath_rate_control_unregister();
 937                 goto bad;
 938         }
 939
 940         /* Initialize LED control */
 941         ath_init_leds(sc);
 942
 943         return 0;
 944 detach:
 945         ath_detach(sc);
 946 bad:
 947         return error;
 948 }
 949
 950 static int ath9k_start(struct ieee80211_hw *hw)
 951 {
 952         struct ath_softc *sc = hw->priv;
 953         struct ieee80211_channel *curchan = hw->conf.channel;
 954         int error = 0, pos;
 955
 956         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Starting driver with "
 957                 "initial channel: %d MHz\n", __func__, curchan->center_freq);
 958
 959         memset(&sc->sc_ht_info, 0, sizeof(struct ath_ht_info));
 960
 961         /* setup initial channel */
 962
 963         pos = ath_get_channel(sc, curchan);
 964         if (pos == -1) {
 965                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
 966                 error = -EINVAL;
 967                 goto exit;
 968         }
 969
 970         sc->sc_ah->ah_channels[pos].chanmode =
 971                 (curchan->band == IEEE80211_BAND_2GHZ) ? CHANNEL_G : CHANNEL_A;
 972
 973         error = ath_open(sc, &sc->sc_ah->ah_channels[pos]);
 974         if (error) {
 975                 DPRINTF(sc, ATH_DBG_FATAL,
 976                         "%s: Unable to complete ath_open\n", __func__);
 977                 goto exit;
 978         }
 979
 980 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
 981         error = ath_start_rfkill_poll(sc);
 982 #endif
 983
 984 exit:
 985         return error;
 986 }
 987
 988 static int ath9k_tx(struct ieee80211_hw *hw,
 989                     struct sk_buff *skb)
 990 {
 991         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 992         struct ath_softc *sc = hw->priv;
 993         struct ath_tx_control txctl;
 994         int hdrlen, padsize;
 995
 996         memset(&txctl, 0, sizeof(struct ath_tx_control));
 997
 998         /*
 999          * As a temporary workaround, assign seq# here; this will likely need
1000          * to be cleaned up to work better with Beacon transmission and virtual
1001          * BSSes.
1002          */
1003         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1004                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1005                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
1006                         sc->seq_no += 0x10;
1007                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1008                 hdr->seq_ctrl |= cpu_to_le16(sc->seq_no);
1009         }
1010
1011         /* Add the padding after the header if this is not already done */
1012         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1013         if (hdrlen & 3) {
1014                 padsize = hdrlen % 4;
1015                 if (skb_headroom(skb) < padsize)
1016                         return -1;
1017                 skb_push(skb, padsize);
1018                 memmove(skb->data, skb->data + padsize, hdrlen);
1019         }
1020
1021         /* Check if a tx queue is available */
1022
1023         txctl.txq = ath_test_get_txq(sc, skb);
1024         if (!txctl.txq)
1025                 goto exit;
1026
1027         DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting packet, skb: %p\n",
1028                 __func__,
1029                 skb);
1030
1031         if (ath_tx_start(sc, skb, &txctl) != 0) {
1032                 DPRINTF(sc, ATH_DBG_XMIT, "%s: TX failed\n", __func__);
1033                 goto exit;
1034         }
1035
1036         return 0;
1037 exit:
1038         dev_kfree_skb_any(skb);
1039         return 0;
1040 }
1041
1042 static void ath9k_stop(struct ieee80211_hw *hw)
1043 {
1044         struct ath_softc *sc = hw->priv;
1045
1046         if (sc->sc_flags & SC_OP_INVALID) {
1047                 DPRINTF(sc, ATH_DBG_ANY, "%s: Device not present\n", __func__);
1048                 return;
1049         }
1050
1051         ath_stop(sc);
1052
1053         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Driver halt\n", __func__);
1054 }
1055
1056 static int ath9k_add_interface(struct ieee80211_hw *hw,
1057                                struct ieee80211_if_init_conf *conf)
1058 {
1059         struct ath_softc *sc = hw->priv;
1060         struct ath_vap *avp = (void *)conf->vif->drv_priv;
1061         int ic_opmode = 0;
1062
1063         /* Support only vap for now */
1064
1065         if (sc->sc_nvaps)
1066                 return -ENOBUFS;
1067
1068         switch (conf->type) {
1069         case NL80211_IFTYPE_STATION:
1070                 ic_opmode = ATH9K_M_STA;
1071                 break;
1072         case NL80211_IFTYPE_ADHOC:
1073                 ic_opmode = ATH9K_M_IBSS;
1074                 break;
1075         case NL80211_IFTYPE_AP:
1076                 ic_opmode = ATH9K_M_HOSTAP;
1077                 break;
1078         default:
1079                 DPRINTF(sc, ATH_DBG_FATAL,
1080                         "%s: Interface type %d not yet supported\n",
1081                         __func__, conf->type);
1082                 return -EOPNOTSUPP;
1083         }
1084
1085         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a VAP of type: %d\n",
1086                 __func__,
1087                 ic_opmode);
1088
1089         /* Set the VAP opmode */
1090         avp->av_opmode = ic_opmode;
1091         avp->av_bslot = -1;
1092
1093         if (ic_opmode == ATH9K_M_HOSTAP)
1094                 ath9k_hw_set_tsfadjust(sc->sc_ah, 1);
1095
1096         sc->sc_vaps[0] = conf->vif;
1097         sc->sc_nvaps++;
1098
1099         /* Set the device opmode */
1100         sc->sc_ah->ah_opmode = ic_opmode;
1101
1102         /* default VAP configuration */
1103         avp->av_config.av_fixed_rateset = IEEE80211_FIXED_RATE_NONE;
1104         avp->av_config.av_fixed_retryset = 0x03030303;
1105
1106         if (conf->type == NL80211_IFTYPE_AP) {
1107                 /* TODO: is this a suitable place to start ANI for AP mode? */
1108                 /* Start ANI */
1109                 mod_timer(&sc->sc_ani.timer,
1110                           jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
1111         }
1112
1113         return 0;
1114 }
1115
1116 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1117                                    struct ieee80211_if_init_conf *conf)
1118 {
1119         struct ath_softc *sc = hw->priv;
1120         struct ath_vap *avp = (void *)conf->vif->drv_priv;
1121
1122         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach VAP\n", __func__);
1123
1124 #ifdef CONFIG_SLOW_ANT_DIV
1125         ath_slow_ant_div_stop(&sc->sc_antdiv);
1126 #endif
1127         /* Stop ANI */
1128         del_timer_sync(&sc->sc_ani.timer);
1129
1130         /* Reclaim beacon resources */
1131         if (sc->sc_ah->ah_opmode == ATH9K_M_HOSTAP ||
1132             sc->sc_ah->ah_opmode == ATH9K_M_IBSS) {
1133                 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
1134                 ath_beacon_return(sc, avp);
1135         }
1136
1137         sc->sc_flags &= ~SC_OP_BEACONS;
1138
1139         sc->sc_vaps[0] = NULL;
1140         sc->sc_nvaps--;
1141 }
1142
1143 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1144 {
1145         struct ath_softc *sc = hw->priv;
1146         struct ieee80211_channel *curchan = hw->conf.channel;
1147         struct ieee80211_conf *conf = &hw->conf;
1148         int pos;
1149
1150         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
1151                 __func__,
1152                 curchan->center_freq);
1153
1154         /* Update chainmask */
1155         ath_update_chainmask(sc, conf->ht.enabled);
1156
1157         pos = ath_get_channel(sc, curchan);
1158         if (pos == -1) {
1159                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
1160                 return -EINVAL;
1161         }
1162
1163         sc->sc_ah->ah_channels[pos].chanmode =
1164                 (curchan->band == IEEE80211_BAND_2GHZ) ?
1165                 CHANNEL_G : CHANNEL_A;
1166
1167         if (sc->sc_curaid && hw->conf.ht.enabled)
1168                 sc->sc_ah->ah_channels[pos].chanmode =
1169                         ath_get_extchanmode(sc, curchan);
1170
1171         if (changed & IEEE80211_CONF_CHANGE_POWER)
1172                 sc->sc_config.txpowlimit = 2 * conf->power_level;
1173
1174         /* set h/w channel */
1175         if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
1176                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Unable to set channel\n",
1177                         __func__);
1178
1179         return 0;
1180 }
1181
1182 static int ath9k_config_interface(struct ieee80211_hw *hw,
1183                                   struct ieee80211_vif *vif,
1184                                   struct ieee80211_if_conf *conf)
1185 {
1186         struct ath_softc *sc = hw->priv;
1187         struct ath_hal *ah = sc->sc_ah;
1188         struct ath_vap *avp = (void *)vif->drv_priv;
1189         u32 rfilt = 0;
1190         int error, i;
1191
1192         /* TODO: Need to decide which hw opmode to use for multi-interface
1193          * cases */
1194         if (vif->type == NL80211_IFTYPE_AP &&
1195             ah->ah_opmode != ATH9K_M_HOSTAP) {
1196                 ah->ah_opmode = ATH9K_M_HOSTAP;
1197                 ath9k_hw_setopmode(ah);
1198                 ath9k_hw_write_associd(ah, sc->sc_myaddr, 0);
1199                 /* Request full reset to get hw opmode changed properly */
1200                 sc->sc_flags |= SC_OP_FULL_RESET;
1201         }
1202
1203         if ((conf->changed & IEEE80211_IFCC_BSSID) &&
1204             !is_zero_ether_addr(conf->bssid)) {
1205                 switch (vif->type) {
1206                 case NL80211_IFTYPE_STATION:
1207                 case NL80211_IFTYPE_ADHOC:
1208                         /* Update ratectrl about the new state */
1209                         ath_rate_newstate(sc, avp);
1210
1211                         /* Set BSSID */
1212                         memcpy(sc->sc_curbssid, conf->bssid, ETH_ALEN);
1213                         sc->sc_curaid = 0;
1214                         ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
1215                                                sc->sc_curaid);
1216
1217                         /* Set aggregation protection mode parameters */
1218                         sc->sc_config.ath_aggr_prot = 0;
1219
1220                         DPRINTF(sc, ATH_DBG_CONFIG,
1221                                 "%s: RX filter 0x%x bssid %pM aid 0x%x\n",
1222                                 __func__, rfilt,
1223                                 sc->sc_curbssid, sc->sc_curaid);
1224
1225                         /* need to reconfigure the beacon */
1226                         sc->sc_flags &= ~SC_OP_BEACONS ;
1227
1228                         break;
1229                 default:
1230                         break;
1231                 }
1232         }
1233
1234         if ((conf->changed & IEEE80211_IFCC_BEACON) &&
1235             ((vif->type == NL80211_IFTYPE_ADHOC) ||
1236              (vif->type == NL80211_IFTYPE_AP))) {
1237                 /*
1238                  * Allocate and setup the beacon frame.
1239                  *
1240                  * Stop any previous beacon DMA.  This may be
1241                  * necessary, for example, when an ibss merge
1242                  * causes reconfiguration; we may be called
1243                  * with beacon transmission active.
1244                  */
1245                 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
1246
1247                 error = ath_beacon_alloc(sc, 0);
1248                 if (error != 0)
1249                         return error;
1250
1251                 ath_beacon_sync(sc, 0);
1252         }
1253
1254         /* Check for WLAN_CAPABILITY_PRIVACY ? */
1255         if ((avp->av_opmode != ATH9K_M_STA)) {
1256                 for (i = 0; i < IEEE80211_WEP_NKID; i++)
1257                         if (ath9k_hw_keyisvalid(sc->sc_ah, (u16)i))
1258                                 ath9k_hw_keysetmac(sc->sc_ah,
1259                                                    (u16)i,
1260                                                    sc->sc_curbssid);
1261         }
1262
1263         /* Only legacy IBSS for now */
1264         if (vif->type == NL80211_IFTYPE_ADHOC)
1265                 ath_update_chainmask(sc, 0);
1266
1267         return 0;
1268 }
1269
1270 #define SUPPORTED_FILTERS                       \
1271         (FIF_PROMISC_IN_BSS |                   \
1272         FIF_ALLMULTI |                          \
1273         FIF_CONTROL |                           \
1274         FIF_OTHER_BSS |                         \
1275         FIF_BCN_PRBRESP_PROMISC |               \
1276         FIF_FCSFAIL)
1277
1278 /* FIXME: sc->sc_full_reset ? */
1279 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1280                                    unsigned int changed_flags,
1281                                    unsigned int *total_flags,
1282                                    int mc_count,
1283                                    struct dev_mc_list *mclist)
1284 {
1285         struct ath_softc *sc = hw->priv;
1286         u32 rfilt;
1287
1288         changed_flags &= SUPPORTED_FILTERS;
1289         *total_flags &= SUPPORTED_FILTERS;
1290
1291         sc->rx_filter = *total_flags;
1292         rfilt = ath_calcrxfilter(sc);
1293         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1294
1295         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1296                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1297                         ath9k_hw_write_associd(sc->sc_ah, ath_bcast_mac, 0);
1298         }
1299
1300         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set HW RX filter: 0x%x\n",
1301                 __func__, sc->rx_filter);
1302 }
1303
1304 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1305                              struct ieee80211_vif *vif,
1306                              enum sta_notify_cmd cmd,
1307                              struct ieee80211_sta *sta)
1308 {
1309         struct ath_softc *sc = hw->priv;
1310
1311         switch (cmd) {
1312         case STA_NOTIFY_ADD:
1313                 ath_node_attach(sc, sta);
1314                 break;
1315         case STA_NOTIFY_REMOVE:
1316                 ath_node_detach(sc, sta);
1317                 break;
1318         default:
1319                 break;
1320         }
1321 }
1322
1323 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1324                          u16 queue,
1325                          const struct ieee80211_tx_queue_params *params)
1326 {
1327         struct ath_softc *sc = hw->priv;
1328         struct ath9k_tx_queue_info qi;
1329         int ret = 0, qnum;
1330
1331         if (queue >= WME_NUM_AC)
1332                 return 0;
1333
1334         qi.tqi_aifs = params->aifs;
1335         qi.tqi_cwmin = params->cw_min;
1336         qi.tqi_cwmax = params->cw_max;
1337         qi.tqi_burstTime = params->txop;
1338         qnum = ath_get_hal_qnum(queue, sc);
1339
1340         DPRINTF(sc, ATH_DBG_CONFIG,
1341                 "%s: Configure tx [queue/halq] [%d/%d],  "
1342                 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1343                 __func__,
1344                 queue,
1345                 qnum,
1346                 params->aifs,
1347                 params->cw_min,
1348                 params->cw_max,
1349                 params->txop);
1350
1351         ret = ath_txq_update(sc, qnum, &qi);
1352         if (ret)
1353                 DPRINTF(sc, ATH_DBG_FATAL,
1354                         "%s: TXQ Update failed\n", __func__);
1355
1356         return ret;
1357 }
1358
1359 static int ath9k_set_key(struct ieee80211_hw *hw,
1360                          enum set_key_cmd cmd,
1361                          const u8 *local_addr,
1362                          const u8 *addr,
1363                          struct ieee80211_key_conf *key)
1364 {
1365         struct ath_softc *sc = hw->priv;
1366         int ret = 0;
1367
1368         DPRINTF(sc, ATH_DBG_KEYCACHE, " %s: Set HW Key\n", __func__);
1369
1370         switch (cmd) {
1371         case SET_KEY:
1372                 ret = ath_key_config(sc, addr, key);
1373                 if (!ret) {
1374                         set_bit(key->keyidx, sc->sc_keymap);
1375                         key->hw_key_idx = key->keyidx;
1376                         /* push IV and Michael MIC generation to stack */
1377                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1378                         if (key->alg == ALG_TKIP)
1379                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1380                 }
1381                 break;
1382         case DISABLE_KEY:
1383                 ath_key_delete(sc, key);
1384                 clear_bit(key->keyidx, sc->sc_keymap);
1385                 break;
1386         default:
1387                 ret = -EINVAL;
1388         }
1389
1390         return ret;
1391 }
1392
1393 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1394                                    struct ieee80211_vif *vif,
1395                                    struct ieee80211_bss_conf *bss_conf,
1396                                    u32 changed)
1397 {
1398         struct ath_softc *sc = hw->priv;
1399
1400         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1401                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed PREAMBLE %d\n",
1402                         __func__,
1403                         bss_conf->use_short_preamble);
1404                 if (bss_conf->use_short_preamble)
1405                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
1406                 else
1407                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
1408         }
1409
1410         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1411                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed CTS PROT %d\n",
1412                         __func__,
1413                         bss_conf->use_cts_prot);
1414                 if (bss_conf->use_cts_prot &&
1415                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
1416                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
1417                 else
1418                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
1419         }
1420
1421         if (changed & BSS_CHANGED_HT) {
1422                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed HT\n",
1423                         __func__);
1424                 ath9k_ht_conf(sc, bss_conf);
1425         }
1426
1427         if (changed & BSS_CHANGED_ASSOC) {
1428                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed ASSOC %d\n",
1429                         __func__,
1430                         bss_conf->assoc);
1431                 ath9k_bss_assoc_info(sc, vif, bss_conf);
1432         }
1433 }
1434
1435 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
1436 {
1437         u64 tsf;
1438         struct ath_softc *sc = hw->priv;
1439         struct ath_hal *ah = sc->sc_ah;
1440
1441         tsf = ath9k_hw_gettsf64(ah);
1442
1443         return tsf;
1444 }
1445
1446 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
1447 {
1448         struct ath_softc *sc = hw->priv;
1449         struct ath_hal *ah = sc->sc_ah;
1450
1451         ath9k_hw_reset_tsf(ah);
1452 }
1453
1454 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1455                        enum ieee80211_ampdu_mlme_action action,
1456                        struct ieee80211_sta *sta,
1457                        u16 tid, u16 *ssn)
1458 {
1459         struct ath_softc *sc = hw->priv;
1460         int ret = 0;
1461
1462         switch (action) {
1463         case IEEE80211_AMPDU_RX_START:
1464                 if (!(sc->sc_flags & SC_OP_RXAGGR))
1465                         ret = -ENOTSUPP;
1466                 break;
1467         case IEEE80211_AMPDU_RX_STOP:
1468                 break;
1469         case IEEE80211_AMPDU_TX_START:
1470                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
1471                 if (ret < 0)
1472                         DPRINTF(sc, ATH_DBG_FATAL,
1473                                 "%s: Unable to start TX aggregation\n",
1474                                 __func__);
1475                 else
1476                         ieee80211_start_tx_ba_cb_irqsafe(hw, sta->addr, tid);
1477                 break;
1478         case IEEE80211_AMPDU_TX_STOP:
1479                 ret = ath_tx_aggr_stop(sc, sta, tid);
1480                 if (ret < 0)
1481                         DPRINTF(sc, ATH_DBG_FATAL,
1482                                 "%s: Unable to stop TX aggregation\n",
1483                                 __func__);
1484
1485                 ieee80211_stop_tx_ba_cb_irqsafe(hw, sta->addr, tid);
1486                 break;
1487         case IEEE80211_AMPDU_TX_RESUME:
1488                 ath_tx_aggr_resume(sc, sta, tid);
1489                 break;
1490         default:
1491                 DPRINTF(sc, ATH_DBG_FATAL,
1492                         "%s: Unknown AMPDU action\n", __func__);
1493         }
1494
1495         return ret;
1496 }
1497
1498 static int ath9k_no_fragmentation(struct ieee80211_hw *hw, u32 value)
1499 {
1500         return -EOPNOTSUPP;
1501 }
1502
1503 static struct ieee80211_ops ath9k_ops = {
1504         .tx                 = ath9k_tx,
1505         .start              = ath9k_start,
1506         .stop               = ath9k_stop,
1507         .add_interface      = ath9k_add_interface,
1508         .remove_interface   = ath9k_remove_interface,
1509         .config             = ath9k_config,
1510         .config_interface   = ath9k_config_interface,
1511         .configure_filter   = ath9k_configure_filter,
1512         .sta_notify         = ath9k_sta_notify,
1513         .conf_tx            = ath9k_conf_tx,
1514         .bss_info_changed   = ath9k_bss_info_changed,
1515         .set_key            = ath9k_set_key,
1516         .get_tsf            = ath9k_get_tsf,
1517         .reset_tsf          = ath9k_reset_tsf,
1518         .ampdu_action       = ath9k_ampdu_action,
1519         .set_frag_threshold = ath9k_no_fragmentation,
1520 };
1521
1522 static struct {
1523         u32 version;
1524         const char * name;
1525 } ath_mac_bb_names[] = {
1526         { AR_SREV_VERSION_5416_PCI,     "5416" },
1527         { AR_SREV_VERSION_5416_PCIE,    "5418" },
1528         { AR_SREV_VERSION_9100,         "9100" },
1529         { AR_SREV_VERSION_9160,         "9160" },
1530         { AR_SREV_VERSION_9280,         "9280" },
1531         { AR_SREV_VERSION_9285,         "9285" }
1532 };
1533
1534 static struct {
1535         u16 version;
1536         const char * name;
1537 } ath_rf_names[] = {
1538         { 0,                            "5133" },
1539         { AR_RAD5133_SREV_MAJOR,        "5133" },
1540         { AR_RAD5122_SREV_MAJOR,        "5122" },
1541         { AR_RAD2133_SREV_MAJOR,        "2133" },
1542         { AR_RAD2122_SREV_MAJOR,        "2122" }
1543 };
1544
1545 /*
1546  * Return the MAC/BB name. "????" is returned if the MAC/BB is unknown.
1547  */
1548
1549 static const char *
1550 ath_mac_bb_name(u32 mac_bb_version)
1551 {
1552         int i;
1553
1554         for (i=0; i<ARRAY_SIZE(ath_mac_bb_names); i++) {
1555                 if (ath_mac_bb_names[i].version == mac_bb_version) {
1556                         return ath_mac_bb_names[i].name;
1557                 }
1558         }
1559
1560         return "????";
1561 }
1562
1563 /*
1564  * Return the RF name. "????" is returned if the RF is unknown.
1565  */
1566
1567 static const char *
1568 ath_rf_name(u16 rf_version)
1569 {
1570         int i;
1571
1572         for (i=0; i<ARRAY_SIZE(ath_rf_names); i++) {
1573                 if (ath_rf_names[i].version == rf_version) {
1574                         return ath_rf_names[i].name;
1575                 }
1576         }
1577
1578         return "????";
1579 }
1580
1581 static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1582 {
1583         void __iomem *mem;
1584         struct ath_softc *sc;
1585         struct ieee80211_hw *hw;
1586         u8 csz;
1587         u32 val;
1588         int ret = 0;
1589         struct ath_hal *ah;
1590
1591         if (pci_enable_device(pdev))
1592                 return -EIO;
1593
1594         ret =  pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1595
1596         if (ret) {
1597                 printk(KERN_ERR "ath9k: 32-bit DMA not available\n");
1598                 goto bad;
1599         }
1600
1601         ret = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1602
1603         if (ret) {
1604                 printk(KERN_ERR "ath9k: 32-bit DMA consistent "
1605                         "DMA enable faled\n");
1606                 goto bad;
1607         }
1608
1609         /*
1610          * Cache line size is used to size and align various
1611          * structures used to communicate with the hardware.
1612          */
1613         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
1614         if (csz == 0) {
1615                 /*
1616                  * Linux 2.4.18 (at least) writes the cache line size
1617                  * register as a 16-bit wide register which is wrong.
1618                  * We must have this setup properly for rx buffer
1619                  * DMA to work so force a reasonable value here if it
1620                  * comes up zero.
1621                  */
1622                 csz = L1_CACHE_BYTES / sizeof(u32);
1623                 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
1624         }
1625         /*
1626          * The default setting of latency timer yields poor results,
1627          * set it to the value used by other systems. It may be worth
1628          * tweaking this setting more.
1629          */
1630         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
1631
1632         pci_set_master(pdev);
1633
1634         /*
1635          * Disable the RETRY_TIMEOUT register (0x41) to keep
1636          * PCI Tx retries from interfering with C3 CPU state.
1637          */
1638         pci_read_config_dword(pdev, 0x40, &val);
1639         if ((val & 0x0000ff00) != 0)
1640                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1641
1642         ret = pci_request_region(pdev, 0, "ath9k");
1643         if (ret) {
1644                 dev_err(&pdev->dev, "PCI memory region reserve error\n");
1645                 ret = -ENODEV;
1646                 goto bad;
1647         }
1648
1649         mem = pci_iomap(pdev, 0, 0);
1650         if (!mem) {
1651                 printk(KERN_ERR "PCI memory map error\n") ;
1652                 ret = -EIO;
1653                 goto bad1;
1654         }
1655
1656         hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
1657         if (hw == NULL) {
1658                 printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n");
1659                 goto bad2;
1660         }
1661
1662         SET_IEEE80211_DEV(hw, &pdev->dev);
1663         pci_set_drvdata(pdev, hw);
1664
1665         sc = hw->priv;
1666         sc->hw = hw;
1667         sc->pdev = pdev;
1668         sc->mem = mem;
1669
1670         if (ath_attach(id->device, sc) != 0) {
1671                 ret = -ENODEV;
1672                 goto bad3;
1673         }
1674
1675         /* setup interrupt service routine */
1676
1677         if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) {
1678                 printk(KERN_ERR "%s: request_irq failed\n",
1679                         wiphy_name(hw->wiphy));
1680                 ret = -EIO;
1681                 goto bad4;
1682         }
1683
1684         ah = sc->sc_ah;
1685         printk(KERN_INFO
1686                "%s: Atheros AR%s MAC/BB Rev:%x "
1687                "AR%s RF Rev:%x: mem=0x%lx, irq=%d\n",
1688                wiphy_name(hw->wiphy),
1689                ath_mac_bb_name(ah->ah_macVersion),
1690                ah->ah_macRev,
1691                ath_rf_name((ah->ah_analog5GhzRev & AR_RADIO_SREV_MAJOR)),
1692                ah->ah_phyRev,
1693                (unsigned long)mem, pdev->irq);
1694
1695         return 0;
1696 bad4:
1697         ath_detach(sc);
1698 bad3:
1699         ieee80211_free_hw(hw);
1700 bad2:
1701         pci_iounmap(pdev, mem);
1702 bad1:
1703         pci_release_region(pdev, 0);
1704 bad:
1705         pci_disable_device(pdev);
1706         return ret;
1707 }
1708
1709 static void ath_pci_remove(struct pci_dev *pdev)
1710 {
1711         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1712         struct ath_softc *sc = hw->priv;
1713
1714         ath_detach(sc);
1715         if (pdev->irq)
1716                 free_irq(pdev->irq, sc);
1717         pci_iounmap(pdev, sc->mem);
1718         pci_release_region(pdev, 0);
1719         pci_disable_device(pdev);
1720         ieee80211_free_hw(hw);
1721 }
1722
1723 #ifdef CONFIG_PM
1724
1725 static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
1726 {
1727         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1728         struct ath_softc *sc = hw->priv;
1729
1730         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
1731
1732 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
1733         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1734                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
1735 #endif
1736
1737         pci_save_state(pdev);
1738         pci_disable_device(pdev);
1739         pci_set_power_state(pdev, 3);
1740
1741         return 0;
1742 }
1743
1744 static int ath_pci_resume(struct pci_dev *pdev)
1745 {
1746         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1747         struct ath_softc *sc = hw->priv;
1748         u32 val;
1749         int err;
1750
1751         err = pci_enable_device(pdev);
1752         if (err)
1753                 return err;
1754         pci_restore_state(pdev);
1755         /*
1756          * Suspend/Resume resets the PCI configuration space, so we have to
1757          * re-disable the RETRY_TIMEOUT register (0x41) to keep
1758          * PCI Tx retries from interfering with C3 CPU state
1759          */
1760         pci_read_config_dword(pdev, 0x40, &val);
1761         if ((val & 0x0000ff00) != 0)
1762                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1763
1764         /* Enable LED */
1765         ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
1766                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1767         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
1768
1769 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
1770         /*
1771          * check the h/w rfkill state on resume
1772          * and start the rfkill poll timer
1773          */
1774         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1775                 queue_delayed_work(sc->hw->workqueue,
1776                                    &sc->rf_kill.rfkill_poll, 0);
1777 #endif
1778
1779         return 0;
1780 }
1781
1782 #endif /* CONFIG_PM */
1783
1784 MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
1785
1786 static struct pci_driver ath_pci_driver = {
1787         .name       = "ath9k",
1788         .id_table   = ath_pci_id_table,
1789         .probe      = ath_pci_probe,
1790         .remove     = ath_pci_remove,
1791 #ifdef CONFIG_PM
1792         .suspend    = ath_pci_suspend,
1793         .resume     = ath_pci_resume,
1794 #endif /* CONFIG_PM */
1795 };
1796
1797 static int __init init_ath_pci(void)
1798 {
1799         printk(KERN_INFO "%s: %s\n", dev_info, ATH_PCI_VERSION);
1800
1801         if (pci_register_driver(&ath_pci_driver) < 0) {
1802                 printk(KERN_ERR
1803                         "ath_pci: No devices found, driver not installed.\n");
1804                 pci_unregister_driver(&ath_pci_driver);
1805                 return -ENODEV;
1806         }
1807
1808         return 0;
1809 }
1810 module_init(init_ath_pci);
1811
1812 static void __exit exit_ath_pci(void)
1813 {
1814         pci_unregister_driver(&ath_pci_driver);
1815         printk(KERN_INFO "%s: driver unloaded\n", dev_info);
1816 }
1817 module_exit(exit_ath_pci);