SAFE public projects git trees. - safe/jmp/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
  22 #define ATH_PCI_VERSION "0.1"
  23
  24 #define IEEE80211_HTCAP_MAXRXAMPDU_FACTOR       13
  25
  26 static char *dev_info = "ath9k";
  27
  28 MODULE_AUTHOR("Atheros Communications");
  29 MODULE_DESCRIPTION("Support for Atheros 802.11n wireless LAN cards.");
  30 MODULE_SUPPORTED_DEVICE("Atheros 802.11n WLAN cards");
  31 MODULE_LICENSE("Dual BSD/GPL");
  32
  33 static struct pci_device_id ath_pci_id_table[] __devinitdata = {
  34         { PCI_VDEVICE(ATHEROS, 0x0023) }, /* PCI   */
  35         { PCI_VDEVICE(ATHEROS, 0x0024) }, /* PCI-E */
  36         { PCI_VDEVICE(ATHEROS, 0x0027) }, /* PCI   */
  37         { PCI_VDEVICE(ATHEROS, 0x0029) }, /* PCI   */
  38         { PCI_VDEVICE(ATHEROS, 0x002A) }, /* PCI-E */
  39         { 0 }
  40 };
  41
  42 static int ath_get_channel(struct ath_softc *sc,
  43                            struct ieee80211_channel *chan)
  44 {
  45         int i;
  46
  47         for (i = 0; i < sc->sc_ah->ah_nchan; i++) {
  48                 if (sc->sc_ah->ah_channels[i].channel == chan->center_freq)
  49                         return i;
  50         }
  51
  52         return -1;
  53 }
  54
  55 static u32 ath_get_extchanmode(struct ath_softc *sc,
  56                                      struct ieee80211_channel *chan)
  57 {
  58         u32 chanmode = 0;
  59         u8 ext_chan_offset = sc->sc_ht_info.ext_chan_offset;
  60         enum ath9k_ht_macmode tx_chan_width = sc->sc_ht_info.tx_chan_width;
  61
  62         switch (chan->band) {
  63         case IEEE80211_BAND_2GHZ:
  64                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE) &&
  65                     (tx_chan_width == ATH9K_HT_MACMODE_20))
  66                         chanmode = CHANNEL_G_HT20;
  67                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) &&
  68                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
  69                         chanmode = CHANNEL_G_HT40PLUS;
  70                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) &&
  71                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
  72                         chanmode = CHANNEL_G_HT40MINUS;
  73                 break;
  74         case IEEE80211_BAND_5GHZ:
  75                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE) &&
  76                     (tx_chan_width == ATH9K_HT_MACMODE_20))
  77                         chanmode = CHANNEL_A_HT20;
  78                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) &&
  79                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
  80                         chanmode = CHANNEL_A_HT40PLUS;
  81                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) &&
  82                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
  83                         chanmode = CHANNEL_A_HT40MINUS;
  84                 break;
  85         default:
  86                 break;
  87         }
  88
  89         return chanmode;
  90 }
  91
  92
  93 static int ath_setkey_tkip(struct ath_softc *sc,
  94                            struct ieee80211_key_conf *key,
  95                            struct ath9k_keyval *hk,
  96                            const u8 *addr)
  97 {
  98         u8 *key_rxmic = NULL;
  99         u8 *key_txmic = NULL;
 100
 101         key_txmic = key->key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY;
 102         key_rxmic = key->key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY;
 103
 104         if (addr == NULL) {
 105                 /* Group key installation */
 106                 memcpy(hk->kv_mic,  key_rxmic, sizeof(hk->kv_mic));
 107                 return ath_keyset(sc, key->keyidx, hk, addr);
 108         }
 109         if (!sc->sc_splitmic) {
 110                 /*
 111                  * data key goes at first index,
 112                  * the hal handles the MIC keys at index+64.
 113                  */
 114                 memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
 115                 memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic));
 116                 return ath_keyset(sc, key->keyidx, hk, addr);
 117         }
 118         /*
 119          * TX key goes at first index, RX key at +32.
 120          * The hal handles the MIC keys at index+64.
 121          */
 122         memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
 123         if (!ath_keyset(sc, key->keyidx, hk, NULL)) {
 124                 /* Txmic entry failed. No need to proceed further */
 125                 DPRINTF(sc, ATH_DBG_KEYCACHE,
 126                         "%s Setting TX MIC Key Failed\n", __func__);
 127                 return 0;
 128         }
 129
 130         memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
 131         /* XXX delete tx key on failure? */
 132         return ath_keyset(sc, key->keyidx+32, hk, addr);
 133 }
 134
 135 static int ath_key_config(struct ath_softc *sc,
 136                           const u8 *addr,
 137                           struct ieee80211_key_conf *key)
 138 {
 139         struct ieee80211_vif *vif;
 140         struct ath9k_keyval hk;
 141         const u8 *mac = NULL;
 142         int ret = 0;
 143         enum nl80211_iftype opmode;
 144
 145         memset(&hk, 0, sizeof(hk));
 146
 147         switch (key->alg) {
 148         case ALG_WEP:
 149                 hk.kv_type = ATH9K_CIPHER_WEP;
 150                 break;
 151         case ALG_TKIP:
 152                 hk.kv_type = ATH9K_CIPHER_TKIP;
 153                 break;
 154         case ALG_CCMP:
 155                 hk.kv_type = ATH9K_CIPHER_AES_CCM;
 156                 break;
 157         default:
 158                 return -EINVAL;
 159         }
 160
 161         hk.kv_len  = key->keylen;
 162         memcpy(hk.kv_val, key->key, key->keylen);
 163
 164         if (!sc->sc_vaps[0])
 165                 return -EIO;
 166
 167         vif = sc->sc_vaps[0]->av_if_data;
 168         opmode = vif->type;
 169
 170         /*
 171          *  Strategy:
 172          *   For _M_STA mc tx, we will not setup a key at all since we never
 173          *   tx mc.
 174          *   _M_STA mc rx, we will use the keyID.
 175          *   for _M_IBSS mc tx, we will use the keyID, and no macaddr.
 176          *   for _M_IBSS mc rx, we will alloc a slot and plumb the mac of the
 177          *   peer node. BUT we will plumb a cleartext key so that we can do
 178          *   perSta default key table lookup in software.
 179          */
 180         if (is_broadcast_ether_addr(addr)) {
 181                 switch (opmode) {
 182                 case NL80211_IFTYPE_STATION:
 183                         /* default key:  could be group WPA key
 184                          * or could be static WEP key */
 185                         mac = NULL;
 186                         break;
 187                 case NL80211_IFTYPE_ADHOC:
 188                         break;
 189                 case NL80211_IFTYPE_AP:
 190                         break;
 191                 default:
 192                         ASSERT(0);
 193                         break;
 194                 }
 195         } else {
 196                 mac = addr;
 197         }
 198
 199         if (key->alg == ALG_TKIP)
 200                 ret = ath_setkey_tkip(sc, key, &hk, mac);
 201         else
 202                 ret = ath_keyset(sc, key->keyidx, &hk, mac);
 203
 204         if (!ret)
 205                 return -EIO;
 206
 207         return 0;
 208 }
 209
 210 static void ath_key_delete(struct ath_softc *sc, struct ieee80211_key_conf *key)
 211 {
 212         int freeslot;
 213
 214         freeslot = (key->keyidx >= 4) ? 1 : 0;
 215         ath_key_reset(sc, key->keyidx, freeslot);
 216 }
 217
 218 static void setup_ht_cap(struct ieee80211_sta_ht_cap *ht_info)
 219 {
 220 #define ATH9K_HT_CAP_MAXRXAMPDU_65536 0x3       /* 2 ^ 16 */
 221 #define ATH9K_HT_CAP_MPDUDENSITY_8 0x6          /* 8 usec */
 222
 223         ht_info->ht_supported = true;
 224         ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 225                        IEEE80211_HT_CAP_SM_PS |
 226                        IEEE80211_HT_CAP_SGI_40 |
 227                        IEEE80211_HT_CAP_DSSSCCK40;
 228
 229         ht_info->ampdu_factor = ATH9K_HT_CAP_MAXRXAMPDU_65536;
 230         ht_info->ampdu_density = ATH9K_HT_CAP_MPDUDENSITY_8;
 231         /* set up supported mcs set */
 232         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 233         ht_info->mcs.rx_mask[0] = 0xff;
 234         ht_info->mcs.rx_mask[1] = 0xff;
 235         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 236 }
 237
 238 static int ath_rate2idx(struct ath_softc *sc, int rate)
 239 {
 240         int i = 0, cur_band, n_rates;
 241         struct ieee80211_hw *hw = sc->hw;
 242
 243         cur_band = hw->conf.channel->band;
 244         n_rates = sc->sbands[cur_band].n_bitrates;
 245
 246         for (i = 0; i < n_rates; i++) {
 247                 if (sc->sbands[cur_band].bitrates[i].bitrate == rate)
 248                         break;
 249         }
 250
 251         /*
 252          * NB:mac80211 validates rx rate index against the supported legacy rate
 253          * index only (should be done against ht rates also), return the highest
 254          * legacy rate index for rx rate which does not match any one of the
 255          * supported basic and extended rates to make mac80211 happy.
 256          * The following hack will be cleaned up once the issue with
 257          * the rx rate index validation in mac80211 is fixed.
 258          */
 259         if (i == n_rates)
 260                 return n_rates - 1;
 261         return i;
 262 }
 263
 264 static void ath9k_rx_prepare(struct ath_softc *sc,
 265                              struct sk_buff *skb,
 266                              struct ath_recv_status *status,
 267                              struct ieee80211_rx_status *rx_status)
 268 {
 269         struct ieee80211_hw *hw = sc->hw;
 270         struct ieee80211_channel *curchan = hw->conf.channel;
 271
 272         memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
 273
 274         rx_status->mactime = status->tsf;
 275         rx_status->band = curchan->band;
 276         rx_status->freq =  curchan->center_freq;
 277         rx_status->noise = sc->sc_ani.sc_noise_floor;
 278         rx_status->signal = rx_status->noise + status->rssi;
 279         rx_status->rate_idx = ath_rate2idx(sc, (status->rateKbps / 100));
 280         rx_status->antenna = status->antenna;
 281
 282         /* XXX Fix me, 64 cannot be the max rssi value, rigure it out */
 283         rx_status->qual = status->rssi * 100 / 64;
 284
 285         if (status->flags & ATH_RX_MIC_ERROR)
 286                 rx_status->flag |= RX_FLAG_MMIC_ERROR;
 287         if (status->flags & ATH_RX_FCS_ERROR)
 288                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
 289
 290         rx_status->flag |= RX_FLAG_TSFT;
 291 }
 292
 293 static u8 parse_mpdudensity(u8 mpdudensity)
 294 {
 295         /*
 296          * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
 297          *   0 for no restriction
 298          *   1 for 1/4 us
 299          *   2 for 1/2 us
 300          *   3 for 1 us
 301          *   4 for 2 us
 302          *   5 for 4 us
 303          *   6 for 8 us
 304          *   7 for 16 us
 305          */
 306         switch (mpdudensity) {
 307         case 0:
 308                 return 0;
 309         case 1:
 310         case 2:
 311         case 3:
 312                 /* Our lower layer calculations limit our precision to
 313                    1 microsecond */
 314                 return 1;
 315         case 4:
 316                 return 2;
 317         case 5:
 318                 return 4;
 319         case 6:
 320                 return 8;
 321         case 7:
 322                 return 16;
 323         default:
 324                 return 0;
 325         }
 326 }
 327
 328 static void ath9k_ht_conf(struct ath_softc *sc,
 329                           struct ieee80211_bss_conf *bss_conf)
 330 {
 331         struct ath_ht_info *ht_info = &sc->sc_ht_info;
 332
 333         if (bss_conf->assoc_ht) {
 334                 ht_info->ext_chan_offset =
 335                         bss_conf->ht_bss_conf->bss_cap &
 336                                 IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
 337
 338                 if (!(bss_conf->ht_cap->cap &
 339                         IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
 340                             (bss_conf->ht_bss_conf->bss_cap &
 341                                 IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
 342                         ht_info->tx_chan_width = ATH9K_HT_MACMODE_2040;
 343                 else
 344                         ht_info->tx_chan_width = ATH9K_HT_MACMODE_20;
 345
 346                 ath9k_hw_set11nmac2040(sc->sc_ah, ht_info->tx_chan_width);
 347                 ht_info->maxampdu = 1 << (IEEE80211_HTCAP_MAXRXAMPDU_FACTOR +
 348                                         bss_conf->ht_cap->ampdu_factor);
 349                 ht_info->mpdudensity =
 350                         parse_mpdudensity(bss_conf->ht_cap->ampdu_density);
 351
 352         }
 353 }
 354
 355 static void ath9k_bss_assoc_info(struct ath_softc *sc,
 356                                  struct ieee80211_bss_conf *bss_conf)
 357 {
 358         struct ieee80211_hw *hw = sc->hw;
 359         struct ieee80211_channel *curchan = hw->conf.channel;
 360         struct ath_vap *avp;
 361         int pos;
 362
 363         if (bss_conf->assoc) {
 364                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Bss Info ASSOC %d\n",
 365                         __func__,
 366                         bss_conf->aid);
 367
 368                 avp = sc->sc_vaps[0];
 369                 if (avp == NULL) {
 370                         DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
 371                                 __func__);
 372                         return;
 373                 }
 374
 375                 /* New association, store aid */
 376                 if (avp->av_opmode == ATH9K_M_STA) {
 377                         sc->sc_curaid = bss_conf->aid;
 378                         ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
 379                                                sc->sc_curaid);
 380                 }
 381
 382                 /* Configure the beacon */
 383                 ath_beacon_config(sc, 0);
 384                 sc->sc_flags |= SC_OP_BEACONS;
 385
 386                 /* Reset rssi stats */
 387                 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER;
 388                 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER;
 389                 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER;
 390                 sc->sc_halstats.ns_avgtxrate = ATH_RATE_DUMMY_MARKER;
 391
 392                 /* Update chainmask */
 393                 ath_update_chainmask(sc, bss_conf->assoc_ht);
 394
 395                 DPRINTF(sc, ATH_DBG_CONFIG,
 396                         "%s: bssid %pM aid 0x%x\n",
 397                         __func__,
 398                         sc->sc_curbssid, sc->sc_curaid);
 399
 400                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
 401                         __func__,
 402                         curchan->center_freq);
 403
 404                 pos = ath_get_channel(sc, curchan);
 405                 if (pos == -1) {
 406                         DPRINTF(sc, ATH_DBG_FATAL,
 407                                 "%s: Invalid channel\n", __func__);
 408                         return;
 409                 }
 410
 411                 if (hw->conf.ht_cap.ht_supported)
 412                         sc->sc_ah->ah_channels[pos].chanmode =
 413                                 ath_get_extchanmode(sc, curchan);
 414                 else
 415                         sc->sc_ah->ah_channels[pos].chanmode =
 416                                 (curchan->band == IEEE80211_BAND_2GHZ) ?
 417                                 CHANNEL_G : CHANNEL_A;
 418
 419                 /* set h/w channel */
 420                 if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
 421                         DPRINTF(sc, ATH_DBG_FATAL,
 422                                 "%s: Unable to set channel\n",
 423                                 __func__);
 424
 425                 ath_rate_newstate(sc, avp);
 426                 /* Update ratectrl about the new state */
 427                 ath_rc_node_update(hw, avp->rc_node);
 428
 429                 /* Start ANI */
 430                 mod_timer(&sc->sc_ani.timer,
 431                         jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
 432
 433         } else {
 434                 DPRINTF(sc, ATH_DBG_CONFIG,
 435                 "%s: Bss Info DISSOC\n", __func__);
 436                 sc->sc_curaid = 0;
 437         }
 438 }
 439
 440 void ath_get_beaconconfig(struct ath_softc *sc,
 441                           int if_id,
 442                           struct ath_beacon_config *conf)
 443 {
 444         struct ieee80211_hw *hw = sc->hw;
 445
 446         /* fill in beacon config data */
 447
 448         conf->beacon_interval = hw->conf.beacon_int;
 449         conf->listen_interval = 100;
 450         conf->dtim_count = 1;
 451         conf->bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf->listen_interval;
 452 }
 453
 454 void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
 455                      struct ath_xmit_status *tx_status, struct ath_node *an)
 456 {
 457         struct ieee80211_hw *hw = sc->hw;
 458         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 459
 460         DPRINTF(sc, ATH_DBG_XMIT,
 461                 "%s: TX complete: skb: %p\n", __func__, skb);
 462
 463         if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK ||
 464                 tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
 465                 /* free driver's private data area of tx_info */
 466                 if (tx_info->driver_data[0] != NULL)
 467                         kfree(tx_info->driver_data[0]);
 468                         tx_info->driver_data[0] = NULL;
 469         }
 470
 471         if (tx_status->flags & ATH_TX_BAR) {
 472                 tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
 473                 tx_status->flags &= ~ATH_TX_BAR;
 474         }
 475
 476         if (tx_status->flags & (ATH_TX_ERROR | ATH_TX_XRETRY)) {
 477                 if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 478                         /* Frame was not ACKed, but an ACK was expected */
 479                         tx_info->status.excessive_retries = 1;
 480                 }
 481         } else {
 482                 /* Frame was ACKed */
 483                 tx_info->flags |= IEEE80211_TX_STAT_ACK;
 484         }
 485
 486         tx_info->status.retry_count = tx_status->retries;
 487
 488         ieee80211_tx_status(hw, skb);
 489         if (an)
 490                 ath_node_put(sc, an, ATH9K_BH_STATUS_CHANGE);
 491 }
 492
 493 int _ath_rx_indicate(struct ath_softc *sc,
 494                      struct sk_buff *skb,
 495                      struct ath_recv_status *status,
 496                      u16 keyix)
 497 {
 498         struct ieee80211_hw *hw = sc->hw;
 499         struct ath_node *an = NULL;
 500         struct ieee80211_rx_status rx_status;
 501         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 502         int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 503         int padsize;
 504         enum ATH_RX_TYPE st;
 505
 506         /* see if any padding is done by the hw and remove it */
 507         if (hdrlen & 3) {
 508                 padsize = hdrlen % 4;
 509                 memmove(skb->data + padsize, skb->data, hdrlen);
 510                 skb_pull(skb, padsize);
 511         }
 512
 513         /* Prepare rx status */
 514         ath9k_rx_prepare(sc, skb, status, &rx_status);
 515
 516         if (!(keyix == ATH9K_RXKEYIX_INVALID) &&
 517             !(status->flags & ATH_RX_DECRYPT_ERROR)) {
 518                 rx_status.flag |= RX_FLAG_DECRYPTED;
 519         } else if ((le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_PROTECTED)
 520                    && !(status->flags & ATH_RX_DECRYPT_ERROR)
 521                    && skb->len >= hdrlen + 4) {
 522                 keyix = skb->data[hdrlen + 3] >> 6;
 523
 524                 if (test_bit(keyix, sc->sc_keymap))
 525                         rx_status.flag |= RX_FLAG_DECRYPTED;
 526         }
 527
 528         spin_lock_bh(&sc->node_lock);
 529         an = ath_node_find(sc, hdr->addr2);
 530         spin_unlock_bh(&sc->node_lock);
 531
 532         if (an) {
 533                 ath_rx_input(sc, an,
 534                              hw->conf.ht_cap.ht_supported,
 535                              skb, status, &st);
 536         }
 537         if (!an || (st != ATH_RX_CONSUMED))
 538                 __ieee80211_rx(hw, skb, &rx_status);
 539
 540         return 0;
 541 }
 542
 543 int ath_rx_subframe(struct ath_node *an,
 544                     struct sk_buff *skb,
 545                     struct ath_recv_status *status)
 546 {
 547         struct ath_softc *sc = an->an_sc;
 548         struct ieee80211_hw *hw = sc->hw;
 549         struct ieee80211_rx_status rx_status;
 550
 551         /* Prepare rx status */
 552         ath9k_rx_prepare(sc, skb, status, &rx_status);
 553         if (!(status->flags & ATH_RX_DECRYPT_ERROR))
 554                 rx_status.flag |= RX_FLAG_DECRYPTED;
 555
 556         __ieee80211_rx(hw, skb, &rx_status);
 557
 558         return 0;
 559 }
 560
 561 /********************************/
 562 /*       LED functions          */
 563 /********************************/
 564
 565 static void ath_led_brightness(struct led_classdev *led_cdev,
 566                                enum led_brightness brightness)
 567 {
 568         struct ath_led *led = container_of(led_cdev, struct ath_led, led_cdev);
 569         struct ath_softc *sc = led->sc;
 570
 571         switch (brightness) {
 572         case LED_OFF:
 573                 if (led->led_type == ATH_LED_ASSOC ||
 574                     led->led_type == ATH_LED_RADIO)
 575                         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
 576                 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN,
 577                                 (led->led_type == ATH_LED_RADIO) ? 1 :
 578                                 !!(sc->sc_flags & SC_OP_LED_ASSOCIATED));
 579                 break;
 580         case LED_FULL:
 581                 if (led->led_type == ATH_LED_ASSOC)
 582                         sc->sc_flags |= SC_OP_LED_ASSOCIATED;
 583                 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 0);
 584                 break;
 585         default:
 586                 break;
 587         }
 588 }
 589
 590 static int ath_register_led(struct ath_softc *sc, struct ath_led *led,
 591                             char *trigger)
 592 {
 593         int ret;
 594
 595         led->sc = sc;
 596         led->led_cdev.name = led->name;
 597         led->led_cdev.default_trigger = trigger;
 598         led->led_cdev.brightness_set = ath_led_brightness;
 599
 600         ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->led_cdev);
 601         if (ret)
 602                 DPRINTF(sc, ATH_DBG_FATAL,
 603                         "Failed to register led:%s", led->name);
 604         else
 605                 led->registered = 1;
 606         return ret;
 607 }
 608
 609 static void ath_unregister_led(struct ath_led *led)
 610 {
 611         if (led->registered) {
 612                 led_classdev_unregister(&led->led_cdev);
 613                 led->registered = 0;
 614         }
 615 }
 616
 617 static void ath_deinit_leds(struct ath_softc *sc)
 618 {
 619         ath_unregister_led(&sc->assoc_led);
 620         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
 621         ath_unregister_led(&sc->tx_led);
 622         ath_unregister_led(&sc->rx_led);
 623         ath_unregister_led(&sc->radio_led);
 624         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
 625 }
 626
 627 static void ath_init_leds(struct ath_softc *sc)
 628 {
 629         char *trigger;
 630         int ret;
 631
 632         /* Configure gpio 1 for output */
 633         ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
 634                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 635         /* LED off, active low */
 636         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
 637
 638         trigger = ieee80211_get_radio_led_name(sc->hw);
 639         snprintf(sc->radio_led.name, sizeof(sc->radio_led.name),
 640                 "ath9k-%s:radio", wiphy_name(sc->hw->wiphy));
 641         ret = ath_register_led(sc, &sc->radio_led, trigger);
 642         sc->radio_led.led_type = ATH_LED_RADIO;
 643         if (ret)
 644                 goto fail;
 645
 646         trigger = ieee80211_get_assoc_led_name(sc->hw);
 647         snprintf(sc->assoc_led.name, sizeof(sc->assoc_led.name),
 648                 "ath9k-%s:assoc", wiphy_name(sc->hw->wiphy));
 649         ret = ath_register_led(sc, &sc->assoc_led, trigger);
 650         sc->assoc_led.led_type = ATH_LED_ASSOC;
 651         if (ret)
 652                 goto fail;
 653
 654         trigger = ieee80211_get_tx_led_name(sc->hw);
 655         snprintf(sc->tx_led.name, sizeof(sc->tx_led.name),
 656                 "ath9k-%s:tx", wiphy_name(sc->hw->wiphy));
 657         ret = ath_register_led(sc, &sc->tx_led, trigger);
 658         sc->tx_led.led_type = ATH_LED_TX;
 659         if (ret)
 660                 goto fail;
 661
 662         trigger = ieee80211_get_rx_led_name(sc->hw);
 663         snprintf(sc->rx_led.name, sizeof(sc->rx_led.name),
 664                 "ath9k-%s:rx", wiphy_name(sc->hw->wiphy));
 665         ret = ath_register_led(sc, &sc->rx_led, trigger);
 666         sc->rx_led.led_type = ATH_LED_RX;
 667         if (ret)
 668                 goto fail;
 669
 670         return;
 671
 672 fail:
 673         ath_deinit_leds(sc);
 674 }
 675
 676 #ifdef CONFIG_RFKILL
 677 /*******************/
 678 /*      Rfkill     */
 679 /*******************/
 680
 681 static void ath_radio_enable(struct ath_softc *sc)
 682 {
 683         struct ath_hal *ah = sc->sc_ah;
 684         int status;
 685
 686         spin_lock_bh(&sc->sc_resetlock);
 687         if (!ath9k_hw_reset(ah, ah->ah_curchan,
 688                             sc->sc_ht_info.tx_chan_width,
 689                             sc->sc_tx_chainmask,
 690                             sc->sc_rx_chainmask,
 691                             sc->sc_ht_extprotspacing,
 692                             false, &status)) {
 693                 DPRINTF(sc, ATH_DBG_FATAL,
 694                         "%s: unable to reset channel %u (%uMhz) "
 695                         "flags 0x%x hal status %u\n", __func__,
 696                         ath9k_hw_mhz2ieee(ah,
 697                                           ah->ah_curchan->channel,
 698                                           ah->ah_curchan->channelFlags),
 699                         ah->ah_curchan->channel,
 700                         ah->ah_curchan->channelFlags, status);
 701         }
 702         spin_unlock_bh(&sc->sc_resetlock);
 703
 704         ath_update_txpow(sc);
 705         if (ath_startrecv(sc) != 0) {
 706                 DPRINTF(sc, ATH_DBG_FATAL,
 707                         "%s: unable to restart recv logic\n", __func__);
 708                 return;
 709         }
 710
 711         if (sc->sc_flags & SC_OP_BEACONS)
 712                 ath_beacon_config(sc, ATH_IF_ID_ANY);   /* restart beacons */
 713
 714         /* Re-Enable  interrupts */
 715         ath9k_hw_set_interrupts(ah, sc->sc_imask);
 716
 717         /* Enable LED */
 718         ath9k_hw_cfg_output(ah, ATH_LED_PIN,
 719                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 720         ath9k_hw_set_gpio(ah, ATH_LED_PIN, 0);
 721
 722         ieee80211_wake_queues(sc->hw);
 723 }
 724
 725 static void ath_radio_disable(struct ath_softc *sc)
 726 {
 727         struct ath_hal *ah = sc->sc_ah;
 728         int status;
 729
 730
 731         ieee80211_stop_queues(sc->hw);
 732
 733         /* Disable LED */
 734         ath9k_hw_set_gpio(ah, ATH_LED_PIN, 1);
 735         ath9k_hw_cfg_gpio_input(ah, ATH_LED_PIN);
 736
 737         /* Disable interrupts */
 738         ath9k_hw_set_interrupts(ah, 0);
 739
 740         ath_draintxq(sc, false);        /* clear pending tx frames */
 741         ath_stoprecv(sc);               /* turn off frame recv */
 742         ath_flushrecv(sc);              /* flush recv queue */
 743
 744         spin_lock_bh(&sc->sc_resetlock);
 745         if (!ath9k_hw_reset(ah, ah->ah_curchan,
 746                             sc->sc_ht_info.tx_chan_width,
 747                             sc->sc_tx_chainmask,
 748                             sc->sc_rx_chainmask,
 749                             sc->sc_ht_extprotspacing,
 750                             false, &status)) {
 751                 DPRINTF(sc, ATH_DBG_FATAL,
 752                         "%s: unable to reset channel %u (%uMhz) "
 753                         "flags 0x%x hal status %u\n", __func__,
 754                         ath9k_hw_mhz2ieee(ah,
 755                                 ah->ah_curchan->channel,
 756                                 ah->ah_curchan->channelFlags),
 757                         ah->ah_curchan->channel,
 758                         ah->ah_curchan->channelFlags, status);
 759         }
 760         spin_unlock_bh(&sc->sc_resetlock);
 761
 762         ath9k_hw_phy_disable(ah);
 763         ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP);
 764 }
 765
 766 static bool ath_is_rfkill_set(struct ath_softc *sc)
 767 {
 768         struct ath_hal *ah = sc->sc_ah;
 769
 770         return ath9k_hw_gpio_get(ah, ah->ah_rfkill_gpio) ==
 771                                   ah->ah_rfkill_polarity;
 772 }
 773
 774 /* h/w rfkill poll function */
 775 static void ath_rfkill_poll(struct work_struct *work)
 776 {
 777         struct ath_softc *sc = container_of(work, struct ath_softc,
 778                                             rf_kill.rfkill_poll.work);
 779         bool radio_on;
 780
 781         if (sc->sc_flags & SC_OP_INVALID)
 782                 return;
 783
 784         radio_on = !ath_is_rfkill_set(sc);
 785
 786         /*
 787          * enable/disable radio only when there is a
 788          * state change in RF switch
 789          */
 790         if (radio_on == !!(sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED)) {
 791                 enum rfkill_state state;
 792
 793                 if (sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED) {
 794                         state = radio_on ? RFKILL_STATE_SOFT_BLOCKED
 795                                 : RFKILL_STATE_HARD_BLOCKED;
 796                 } else if (radio_on) {
 797                         ath_radio_enable(sc);
 798                         state = RFKILL_STATE_UNBLOCKED;
 799                 } else {
 800                         ath_radio_disable(sc);
 801                         state = RFKILL_STATE_HARD_BLOCKED;
 802                 }
 803
 804                 if (state == RFKILL_STATE_HARD_BLOCKED)
 805                         sc->sc_flags |= SC_OP_RFKILL_HW_BLOCKED;
 806                 else
 807                         sc->sc_flags &= ~SC_OP_RFKILL_HW_BLOCKED;
 808
 809                 rfkill_force_state(sc->rf_kill.rfkill, state);
 810         }
 811
 812         queue_delayed_work(sc->hw->workqueue, &sc->rf_kill.rfkill_poll,
 813                            msecs_to_jiffies(ATH_RFKILL_POLL_INTERVAL));
 814 }
 815
 816 /* s/w rfkill handler */
 817 static int ath_sw_toggle_radio(void *data, enum rfkill_state state)
 818 {
 819         struct ath_softc *sc = data;
 820
 821         switch (state) {
 822         case RFKILL_STATE_SOFT_BLOCKED:
 823                 if (!(sc->sc_flags & (SC_OP_RFKILL_HW_BLOCKED |
 824                     SC_OP_RFKILL_SW_BLOCKED)))
 825                         ath_radio_disable(sc);
 826                 sc->sc_flags |= SC_OP_RFKILL_SW_BLOCKED;
 827                 return 0;
 828         case RFKILL_STATE_UNBLOCKED:
 829                 if ((sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED)) {
 830                         sc->sc_flags &= ~SC_OP_RFKILL_SW_BLOCKED;
 831                         if (sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED) {
 832                                 DPRINTF(sc, ATH_DBG_FATAL, "Can't turn on the"
 833                                         "radio as it is disabled by h/w \n");
 834                                 return -EPERM;
 835                         }
 836                         ath_radio_enable(sc);
 837                 }
 838                 return 0;
 839         default:
 840                 return -EINVAL;
 841         }
 842 }
 843
 844 /* Init s/w rfkill */
 845 static int ath_init_sw_rfkill(struct ath_softc *sc)
 846 {
 847         sc->rf_kill.rfkill = rfkill_allocate(wiphy_dev(sc->hw->wiphy),
 848                                              RFKILL_TYPE_WLAN);
 849         if (!sc->rf_kill.rfkill) {
 850                 DPRINTF(sc, ATH_DBG_FATAL, "Failed to allocate rfkill\n");
 851                 return -ENOMEM;
 852         }
 853
 854         snprintf(sc->rf_kill.rfkill_name, sizeof(sc->rf_kill.rfkill_name),
 855                 "ath9k-%s:rfkill", wiphy_name(sc->hw->wiphy));
 856         sc->rf_kill.rfkill->name = sc->rf_kill.rfkill_name;
 857         sc->rf_kill.rfkill->data = sc;
 858         sc->rf_kill.rfkill->toggle_radio = ath_sw_toggle_radio;
 859         sc->rf_kill.rfkill->state = RFKILL_STATE_UNBLOCKED;
 860         sc->rf_kill.rfkill->user_claim_unsupported = 1;
 861
 862         return 0;
 863 }
 864
 865 /* Deinitialize rfkill */
 866 static void ath_deinit_rfkill(struct ath_softc *sc)
 867 {
 868         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
 869                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
 870
 871         if (sc->sc_flags & SC_OP_RFKILL_REGISTERED) {
 872                 rfkill_unregister(sc->rf_kill.rfkill);
 873                 sc->sc_flags &= ~SC_OP_RFKILL_REGISTERED;
 874                 sc->rf_kill.rfkill = NULL;
 875         }
 876 }
 877 #endif /* CONFIG_RFKILL */
 878
 879 static int ath_detach(struct ath_softc *sc)
 880 {
 881         struct ieee80211_hw *hw = sc->hw;
 882
 883         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach ATH hw\n", __func__);
 884
 885         /* Deinit LED control */
 886         ath_deinit_leds(sc);
 887
 888 #ifdef CONFIG_RFKILL
 889         /* deinit rfkill */
 890         ath_deinit_rfkill(sc);
 891 #endif
 892
 893         /* Unregister hw */
 894
 895         ieee80211_unregister_hw(hw);
 896
 897         /* unregister Rate control */
 898         ath_rate_control_unregister();
 899
 900         /* tx/rx cleanup */
 901
 902         ath_rx_cleanup(sc);
 903         ath_tx_cleanup(sc);
 904
 905         /* Deinit */
 906
 907         ath_deinit(sc);
 908
 909         return 0;
 910 }
 911
 912 static int ath_attach(u16 devid,
 913                       struct ath_softc *sc)
 914 {
 915         struct ieee80211_hw *hw = sc->hw;
 916         int error = 0;
 917
 918         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach ATH hw\n", __func__);
 919
 920         error = ath_init(devid, sc);
 921         if (error != 0)
 922                 return error;
 923
 924         /* Init nodes */
 925
 926         INIT_LIST_HEAD(&sc->node_list);
 927         spin_lock_init(&sc->node_lock);
 928
 929         /* get mac address from hardware and set in mac80211 */
 930
 931         SET_IEEE80211_PERM_ADDR(hw, sc->sc_myaddr);
 932
 933         /* setup channels and rates */
 934
 935         sc->sbands[IEEE80211_BAND_2GHZ].channels =
 936                 sc->channels[IEEE80211_BAND_2GHZ];
 937         sc->sbands[IEEE80211_BAND_2GHZ].bitrates =
 938                 sc->rates[IEEE80211_BAND_2GHZ];
 939         sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
 940
 941         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
 942                 /* Setup HT capabilities for 2.4Ghz*/
 943                 setup_ht_cap(&sc->sbands[IEEE80211_BAND_2GHZ].ht_cap);
 944
 945         hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 946                 &sc->sbands[IEEE80211_BAND_2GHZ];
 947
 948         if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes)) {
 949                 sc->sbands[IEEE80211_BAND_5GHZ].channels =
 950                         sc->channels[IEEE80211_BAND_5GHZ];
 951                 sc->sbands[IEEE80211_BAND_5GHZ].bitrates =
 952                         sc->rates[IEEE80211_BAND_5GHZ];
 953                 sc->sbands[IEEE80211_BAND_5GHZ].band =
 954                         IEEE80211_BAND_5GHZ;
 955
 956                 if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
 957                         /* Setup HT capabilities for 5Ghz*/
 958                         setup_ht_cap(&sc->sbands[IEEE80211_BAND_5GHZ].ht_cap);
 959
 960                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 961                         &sc->sbands[IEEE80211_BAND_5GHZ];
 962         }
 963
 964         /* FIXME: Have to figure out proper hw init values later */
 965
 966         hw->queues = 4;
 967         hw->ampdu_queues = 1;
 968
 969         /* Register rate control */
 970         hw->rate_control_algorithm = "ath9k_rate_control";
 971         error = ath_rate_control_register();
 972         if (error != 0) {
 973                 DPRINTF(sc, ATH_DBG_FATAL,
 974                         "%s: Unable to register rate control "
 975                         "algorithm:%d\n", __func__, error);
 976                 ath_rate_control_unregister();
 977                 goto bad;
 978         }
 979
 980         error = ieee80211_register_hw(hw);
 981         if (error != 0) {
 982                 ath_rate_control_unregister();
 983                 goto bad;
 984         }
 985
 986         /* Initialize LED control */
 987         ath_init_leds(sc);
 988
 989 #ifdef CONFIG_RFKILL
 990         /* Initialze h/w Rfkill */
 991         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
 992                 INIT_DELAYED_WORK(&sc->rf_kill.rfkill_poll, ath_rfkill_poll);
 993
 994         /* Initialize s/w rfkill */
 995         if (ath_init_sw_rfkill(sc))
 996                 goto detach;
 997 #endif
 998
 999         /* initialize tx/rx engine */
1000
1001         error = ath_tx_init(sc, ATH_TXBUF);
1002         if (error != 0)
1003                 goto detach;
1004
1005         error = ath_rx_init(sc, ATH_RXBUF);
1006         if (error != 0)
1007                 goto detach;
1008
1009         return 0;
1010 detach:
1011         ath_detach(sc);
1012 bad:
1013         return error;
1014 }
1015
1016 static int ath9k_start(struct ieee80211_hw *hw)
1017 {
1018         struct ath_softc *sc = hw->priv;
1019         struct ieee80211_channel *curchan = hw->conf.channel;
1020         int error = 0, pos;
1021
1022         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Starting driver with "
1023                 "initial channel: %d MHz\n", __func__, curchan->center_freq);
1024
1025         /* setup initial channel */
1026
1027         pos = ath_get_channel(sc, curchan);
1028         if (pos == -1) {
1029                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
1030                 return -EINVAL;
1031         }
1032
1033         sc->sc_ah->ah_channels[pos].chanmode =
1034                 (curchan->band == IEEE80211_BAND_2GHZ) ? CHANNEL_G : CHANNEL_A;
1035
1036         /* open ath_dev */
1037         error = ath_open(sc, &sc->sc_ah->ah_channels[pos]);
1038         if (error) {
1039                 DPRINTF(sc, ATH_DBG_FATAL,
1040                         "%s: Unable to complete ath_open\n", __func__);
1041                 return error;
1042         }
1043
1044 #ifdef CONFIG_RFKILL
1045         /* Start rfkill polling */
1046         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1047                 queue_delayed_work(sc->hw->workqueue,
1048                                    &sc->rf_kill.rfkill_poll, 0);
1049
1050         if (!(sc->sc_flags & SC_OP_RFKILL_REGISTERED)) {
1051                 if (rfkill_register(sc->rf_kill.rfkill)) {
1052                         DPRINTF(sc, ATH_DBG_FATAL,
1053                                         "Unable to register rfkill\n");
1054                         rfkill_free(sc->rf_kill.rfkill);
1055
1056                         /* Deinitialize the device */
1057                         if (sc->pdev->irq)
1058                                 free_irq(sc->pdev->irq, sc);
1059                         ath_detach(sc);
1060                         pci_iounmap(sc->pdev, sc->mem);
1061                         pci_release_region(sc->pdev, 0);
1062                         pci_disable_device(sc->pdev);
1063                         ieee80211_free_hw(hw);
1064                         return -EIO;
1065                 } else {
1066                         sc->sc_flags |= SC_OP_RFKILL_REGISTERED;
1067                 }
1068         }
1069 #endif
1070
1071         ieee80211_wake_queues(hw);
1072         return 0;
1073 }
1074
1075 static int ath9k_tx(struct ieee80211_hw *hw,
1076                     struct sk_buff *skb)
1077 {
1078         struct ath_softc *sc = hw->priv;
1079         int hdrlen, padsize;
1080         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1081
1082         /*
1083          * As a temporary workaround, assign seq# here; this will likely need
1084          * to be cleaned up to work better with Beacon transmission and virtual
1085          * BSSes.
1086          */
1087         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1088                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1089                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
1090                         sc->seq_no += 0x10;
1091                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1092                 hdr->seq_ctrl |= cpu_to_le16(sc->seq_no);
1093         }
1094
1095         /* Add the padding after the header if this is not already done */
1096         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1097         if (hdrlen & 3) {
1098                 padsize = hdrlen % 4;
1099                 if (skb_headroom(skb) < padsize)
1100                         return -1;
1101                 skb_push(skb, padsize);
1102                 memmove(skb->data, skb->data + padsize, hdrlen);
1103         }
1104
1105         DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting packet, skb: %p\n",
1106                 __func__,
1107                 skb);
1108
1109         if (ath_tx_start(sc, skb) != 0) {
1110                 DPRINTF(sc, ATH_DBG_XMIT, "%s: TX failed\n", __func__);
1111                 dev_kfree_skb_any(skb);
1112                 /* FIXME: Check for proper return value from ATH_DEV */
1113                 return 0;
1114         }
1115
1116         return 0;
1117 }
1118
1119 static void ath9k_stop(struct ieee80211_hw *hw)
1120 {
1121         struct ath_softc *sc = hw->priv;
1122         int error;
1123
1124         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Driver halt\n", __func__);
1125
1126         error = ath_suspend(sc);
1127         if (error)
1128                 DPRINTF(sc, ATH_DBG_CONFIG,
1129                         "%s: Device is no longer present\n", __func__);
1130
1131         ieee80211_stop_queues(hw);
1132
1133 #ifdef CONFIG_RFKILL
1134         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1135                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
1136 #endif
1137 }
1138
1139 static int ath9k_add_interface(struct ieee80211_hw *hw,
1140                                struct ieee80211_if_init_conf *conf)
1141 {
1142         struct ath_softc *sc = hw->priv;
1143         int error, ic_opmode = 0;
1144
1145         /* Support only vap for now */
1146
1147         if (sc->sc_nvaps)
1148                 return -ENOBUFS;
1149
1150         switch (conf->type) {
1151         case NL80211_IFTYPE_STATION:
1152                 ic_opmode = ATH9K_M_STA;
1153                 break;
1154         case NL80211_IFTYPE_ADHOC:
1155                 ic_opmode = ATH9K_M_IBSS;
1156                 break;
1157         case NL80211_IFTYPE_AP:
1158                 ic_opmode = ATH9K_M_HOSTAP;
1159                 break;
1160         default:
1161                 DPRINTF(sc, ATH_DBG_FATAL,
1162                         "%s: Interface type %d not yet supported\n",
1163                         __func__, conf->type);
1164                 return -EOPNOTSUPP;
1165         }
1166
1167         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a VAP of type: %d\n",
1168                 __func__,
1169                 ic_opmode);
1170
1171         error = ath_vap_attach(sc, 0, conf->vif, ic_opmode);
1172         if (error) {
1173                 DPRINTF(sc, ATH_DBG_FATAL,
1174                         "%s: Unable to attach vap, error: %d\n",
1175                         __func__, error);
1176                 return error;
1177         }
1178
1179         if (conf->type == NL80211_IFTYPE_AP) {
1180                 /* TODO: is this a suitable place to start ANI for AP mode? */
1181                 /* Start ANI */
1182                 mod_timer(&sc->sc_ani.timer,
1183                           jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
1184         }
1185
1186         return 0;
1187 }
1188
1189 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1190                                    struct ieee80211_if_init_conf *conf)
1191 {
1192         struct ath_softc *sc = hw->priv;
1193         struct ath_vap *avp;
1194         int error;
1195
1196         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach VAP\n", __func__);
1197
1198         avp = sc->sc_vaps[0];
1199         if (avp == NULL) {
1200                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
1201                         __func__);
1202                 return;
1203         }
1204
1205 #ifdef CONFIG_SLOW_ANT_DIV
1206         ath_slow_ant_div_stop(&sc->sc_antdiv);
1207 #endif
1208         /* Stop ANI */
1209         del_timer_sync(&sc->sc_ani.timer);
1210
1211         /* Update ratectrl */
1212         ath_rate_newstate(sc, avp);
1213
1214         /* Reclaim beacon resources */
1215         if (sc->sc_ah->ah_opmode == ATH9K_M_HOSTAP ||
1216             sc->sc_ah->ah_opmode == ATH9K_M_IBSS) {
1217                 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
1218                 ath_beacon_return(sc, avp);
1219         }
1220
1221         /* Set interrupt mask */
1222         sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1223         ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_imask & ~ATH9K_INT_GLOBAL);
1224         sc->sc_flags &= ~SC_OP_BEACONS;
1225
1226         error = ath_vap_detach(sc, 0);
1227         if (error)
1228                 DPRINTF(sc, ATH_DBG_FATAL,
1229                         "%s: Unable to detach vap, error: %d\n",
1230                         __func__, error);
1231 }
1232
1233 static int ath9k_config(struct ieee80211_hw *hw,
1234                         struct ieee80211_conf *conf)
1235 {
1236         struct ath_softc *sc = hw->priv;
1237         struct ieee80211_channel *curchan = hw->conf.channel;
1238         int pos;
1239
1240         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
1241                 __func__,
1242                 curchan->center_freq);
1243
1244         pos = ath_get_channel(sc, curchan);
1245         if (pos == -1) {
1246                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
1247                 return -EINVAL;
1248         }
1249
1250         sc->sc_ah->ah_channels[pos].chanmode =
1251                 (curchan->band == IEEE80211_BAND_2GHZ) ?
1252                 CHANNEL_G : CHANNEL_A;
1253
1254         if (sc->sc_curaid && hw->conf.ht_cap.ht_supported)
1255                 sc->sc_ah->ah_channels[pos].chanmode =
1256                         ath_get_extchanmode(sc, curchan);
1257
1258         sc->sc_config.txpowlimit = 2 * conf->power_level;
1259
1260         /* set h/w channel */
1261         if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
1262                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Unable to set channel\n",
1263                         __func__);
1264
1265         return 0;
1266 }
1267
1268 static int ath9k_config_interface(struct ieee80211_hw *hw,
1269                                   struct ieee80211_vif *vif,
1270                                   struct ieee80211_if_conf *conf)
1271 {
1272         struct ath_softc *sc = hw->priv;
1273         struct ath_hal *ah = sc->sc_ah;
1274         struct ath_vap *avp;
1275         u32 rfilt = 0;
1276         int error, i;
1277
1278         avp = sc->sc_vaps[0];
1279         if (avp == NULL) {
1280                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
1281                         __func__);
1282                 return -EINVAL;
1283         }
1284
1285         /* TODO: Need to decide which hw opmode to use for multi-interface
1286          * cases */
1287         if (vif->type == NL80211_IFTYPE_AP &&
1288             ah->ah_opmode != ATH9K_M_HOSTAP) {
1289                 ah->ah_opmode = ATH9K_M_HOSTAP;
1290                 ath9k_hw_setopmode(ah);
1291                 ath9k_hw_write_associd(ah, sc->sc_myaddr, 0);
1292                 /* Request full reset to get hw opmode changed properly */
1293                 sc->sc_flags |= SC_OP_FULL_RESET;
1294         }
1295
1296         if ((conf->changed & IEEE80211_IFCC_BSSID) &&
1297             !is_zero_ether_addr(conf->bssid)) {
1298                 switch (vif->type) {
1299                 case NL80211_IFTYPE_STATION:
1300                 case NL80211_IFTYPE_ADHOC:
1301                         /* Update ratectrl about the new state */
1302                         ath_rate_newstate(sc, avp);
1303
1304                         /* Set BSSID */
1305                         memcpy(sc->sc_curbssid, conf->bssid, ETH_ALEN);
1306                         sc->sc_curaid = 0;
1307                         ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
1308                                                sc->sc_curaid);
1309
1310                         /* Set aggregation protection mode parameters */
1311                         sc->sc_config.ath_aggr_prot = 0;
1312
1313                         /*
1314                          * Reset our TSF so that its value is lower than the
1315                          * beacon that we are trying to catch.
1316                          * Only then hw will update its TSF register with the
1317                          * new beacon. Reset the TSF before setting the BSSID
1318                          * to avoid allowing in any frames that would update
1319                          * our TSF only to have us clear it
1320                          * immediately thereafter.
1321                          */
1322                         ath9k_hw_reset_tsf(sc->sc_ah);
1323
1324                         /* Disable BMISS interrupt when we're not associated */
1325                         ath9k_hw_set_interrupts(sc->sc_ah,
1326                                         sc->sc_imask &
1327                                         ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS));
1328                         sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1329
1330                         DPRINTF(sc, ATH_DBG_CONFIG,
1331                                 "%s: RX filter 0x%x bssid %pM aid 0x%x\n",
1332                                 __func__, rfilt,
1333                                 sc->sc_curbssid, sc->sc_curaid);
1334
1335                         /* need to reconfigure the beacon */
1336                         sc->sc_flags &= ~SC_OP_BEACONS ;
1337
1338                         break;
1339                 default:
1340                         break;
1341                 }
1342         }
1343
1344         if ((conf->changed & IEEE80211_IFCC_BEACON) &&
1345             ((vif->type == NL80211_IFTYPE_ADHOC) ||
1346              (vif->type == NL80211_IFTYPE_AP))) {
1347                 /*
1348                  * Allocate and setup the beacon frame.
1349                  *
1350                  * Stop any previous beacon DMA.  This may be
1351                  * necessary, for example, when an ibss merge
1352                  * causes reconfiguration; we may be called
1353                  * with beacon transmission active.
1354                  */
1355                 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
1356
1357                 error = ath_beacon_alloc(sc, 0);
1358                 if (error != 0)
1359                         return error;
1360
1361                 ath_beacon_sync(sc, 0);
1362         }
1363
1364         /* Check for WLAN_CAPABILITY_PRIVACY ? */
1365         if ((avp->av_opmode != NL80211_IFTYPE_STATION)) {
1366                 for (i = 0; i < IEEE80211_WEP_NKID; i++)
1367                         if (ath9k_hw_keyisvalid(sc->sc_ah, (u16)i))
1368                                 ath9k_hw_keysetmac(sc->sc_ah,
1369                                                    (u16)i,
1370                                                    sc->sc_curbssid);
1371         }
1372
1373         /* Only legacy IBSS for now */
1374         if (vif->type == NL80211_IFTYPE_ADHOC)
1375                 ath_update_chainmask(sc, 0);
1376
1377         return 0;
1378 }
1379
1380 #define SUPPORTED_FILTERS                       \
1381         (FIF_PROMISC_IN_BSS |                   \
1382         FIF_ALLMULTI |                          \
1383         FIF_CONTROL |                           \
1384         FIF_OTHER_BSS |                         \
1385         FIF_BCN_PRBRESP_PROMISC |               \
1386         FIF_FCSFAIL)
1387
1388 /* FIXME: sc->sc_full_reset ? */
1389 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1390                                    unsigned int changed_flags,
1391                                    unsigned int *total_flags,
1392                                    int mc_count,
1393                                    struct dev_mc_list *mclist)
1394 {
1395         struct ath_softc *sc = hw->priv;
1396         u32 rfilt;
1397
1398         changed_flags &= SUPPORTED_FILTERS;
1399         *total_flags &= SUPPORTED_FILTERS;
1400
1401         sc->rx_filter = *total_flags;
1402         rfilt = ath_calcrxfilter(sc);
1403         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1404
1405         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1406                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1407                         ath9k_hw_write_associd(sc->sc_ah, ath_bcast_mac, 0);
1408         }
1409
1410         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set HW RX filter: 0x%x\n",
1411                 __func__, sc->rx_filter);
1412 }
1413
1414 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1415                              struct ieee80211_vif *vif,
1416                              enum sta_notify_cmd cmd,
1417                              struct ieee80211_sta *sta)
1418 {
1419         struct ath_softc *sc = hw->priv;
1420         struct ath_node *an;
1421         unsigned long flags;
1422
1423         spin_lock_irqsave(&sc->node_lock, flags);
1424         an = ath_node_find(sc, sta->addr);
1425         spin_unlock_irqrestore(&sc->node_lock, flags);
1426
1427         switch (cmd) {
1428         case STA_NOTIFY_ADD:
1429                 spin_lock_irqsave(&sc->node_lock, flags);
1430                 if (!an) {
1431                         ath_node_attach(sc, sta->addr, 0);
1432                         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a node: %pM\n",
1433                                 __func__, sta->addr);
1434                 } else {
1435                         ath_node_get(sc, sta->addr);
1436                 }
1437                 spin_unlock_irqrestore(&sc->node_lock, flags);
1438                 break;
1439         case STA_NOTIFY_REMOVE:
1440                 if (!an)
1441                         DPRINTF(sc, ATH_DBG_FATAL,
1442                                 "%s: Removal of a non-existent node\n",
1443                                 __func__);
1444                 else {
1445                         ath_node_put(sc, an, ATH9K_BH_STATUS_INTACT);
1446                         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Put a node: %pM\n",
1447                                 __func__,
1448                                 sta->addr);
1449                 }
1450                 break;
1451         default:
1452                 break;
1453         }
1454 }
1455
1456 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1457                          u16 queue,
1458                          const struct ieee80211_tx_queue_params *params)
1459 {
1460         struct ath_softc *sc = hw->priv;
1461         struct ath9k_tx_queue_info qi;
1462         int ret = 0, qnum;
1463
1464         if (queue >= WME_NUM_AC)
1465                 return 0;
1466
1467         qi.tqi_aifs = params->aifs;
1468         qi.tqi_cwmin = params->cw_min;
1469         qi.tqi_cwmax = params->cw_max;
1470         qi.tqi_burstTime = params->txop;
1471         qnum = ath_get_hal_qnum(queue, sc);
1472
1473         DPRINTF(sc, ATH_DBG_CONFIG,
1474                 "%s: Configure tx [queue/halq] [%d/%d],  "
1475                 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1476                 __func__,
1477                 queue,
1478                 qnum,
1479                 params->aifs,
1480                 params->cw_min,
1481                 params->cw_max,
1482                 params->txop);
1483
1484         ret = ath_txq_update(sc, qnum, &qi);
1485         if (ret)
1486                 DPRINTF(sc, ATH_DBG_FATAL,
1487                         "%s: TXQ Update failed\n", __func__);
1488
1489         return ret;
1490 }
1491
1492 static int ath9k_set_key(struct ieee80211_hw *hw,
1493                          enum set_key_cmd cmd,
1494                          const u8 *local_addr,
1495                          const u8 *addr,
1496                          struct ieee80211_key_conf *key)
1497 {
1498         struct ath_softc *sc = hw->priv;
1499         int ret = 0;
1500
1501         DPRINTF(sc, ATH_DBG_KEYCACHE, " %s: Set HW Key\n", __func__);
1502
1503         switch (cmd) {
1504         case SET_KEY:
1505                 ret = ath_key_config(sc, addr, key);
1506                 if (!ret) {
1507                         set_bit(key->keyidx, sc->sc_keymap);
1508                         key->hw_key_idx = key->keyidx;
1509                         /* push IV and Michael MIC generation to stack */
1510                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1511                         if (key->alg == ALG_TKIP)
1512                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1513                 }
1514                 break;
1515         case DISABLE_KEY:
1516                 ath_key_delete(sc, key);
1517                 clear_bit(key->keyidx, sc->sc_keymap);
1518                 break;
1519         default:
1520                 ret = -EINVAL;
1521         }
1522
1523         return ret;
1524 }
1525
1526 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1527                                    struct ieee80211_vif *vif,
1528                                    struct ieee80211_bss_conf *bss_conf,
1529                                    u32 changed)
1530 {
1531         struct ath_softc *sc = hw->priv;
1532
1533         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1534                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed PREAMBLE %d\n",
1535                         __func__,
1536                         bss_conf->use_short_preamble);
1537                 if (bss_conf->use_short_preamble)
1538                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
1539                 else
1540                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
1541         }
1542
1543         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1544                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed CTS PROT %d\n",
1545                         __func__,
1546                         bss_conf->use_cts_prot);
1547                 if (bss_conf->use_cts_prot &&
1548                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
1549                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
1550                 else
1551                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
1552         }
1553
1554         if (changed & BSS_CHANGED_HT) {
1555                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed HT %d\n",
1556                         __func__,
1557                         bss_conf->assoc_ht);
1558                 ath9k_ht_conf(sc, bss_conf);
1559         }
1560
1561         if (changed & BSS_CHANGED_ASSOC) {
1562                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed ASSOC %d\n",
1563                         __func__,
1564                         bss_conf->assoc);
1565                 ath9k_bss_assoc_info(sc, bss_conf);
1566         }
1567 }
1568
1569 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
1570 {
1571         u64 tsf;
1572         struct ath_softc *sc = hw->priv;
1573         struct ath_hal *ah = sc->sc_ah;
1574
1575         tsf = ath9k_hw_gettsf64(ah);
1576
1577         return tsf;
1578 }
1579
1580 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
1581 {
1582         struct ath_softc *sc = hw->priv;
1583         struct ath_hal *ah = sc->sc_ah;
1584
1585         ath9k_hw_reset_tsf(ah);
1586 }
1587
1588 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1589                        enum ieee80211_ampdu_mlme_action action,
1590                        struct ieee80211_sta *sta,
1591                        u16 tid, u16 *ssn)
1592 {
1593         struct ath_softc *sc = hw->priv;
1594         int ret = 0;
1595
1596         switch (action) {
1597         case IEEE80211_AMPDU_RX_START:
1598                 ret = ath_rx_aggr_start(sc, sta->addr, tid, ssn);
1599                 if (ret < 0)
1600                         DPRINTF(sc, ATH_DBG_FATAL,
1601                                 "%s: Unable to start RX aggregation\n",
1602                                 __func__);
1603                 break;
1604         case IEEE80211_AMPDU_RX_STOP:
1605                 ret = ath_rx_aggr_stop(sc, sta->addr, tid);
1606                 if (ret < 0)
1607                         DPRINTF(sc, ATH_DBG_FATAL,
1608                                 "%s: Unable to stop RX aggregation\n",
1609                                 __func__);
1610                 break;
1611         case IEEE80211_AMPDU_TX_START:
1612                 ret = ath_tx_aggr_start(sc, sta->addr, tid, ssn);
1613                 if (ret < 0)
1614                         DPRINTF(sc, ATH_DBG_FATAL,
1615                                 "%s: Unable to start TX aggregation\n",
1616                                 __func__);
1617                 else
1618                         ieee80211_start_tx_ba_cb_irqsafe(hw, sta->addr, tid);
1619                 break;
1620         case IEEE80211_AMPDU_TX_STOP:
1621                 ret = ath_tx_aggr_stop(sc, sta->addr, tid);
1622                 if (ret < 0)
1623                         DPRINTF(sc, ATH_DBG_FATAL,
1624                                 "%s: Unable to stop TX aggregation\n",
1625                                 __func__);
1626
1627                 ieee80211_stop_tx_ba_cb_irqsafe(hw, sta->addr, tid);
1628                 break;
1629         default:
1630                 DPRINTF(sc, ATH_DBG_FATAL,
1631                         "%s: Unknown AMPDU action\n", __func__);
1632         }
1633
1634         return ret;
1635 }
1636
1637 static int ath9k_no_fragmentation(struct ieee80211_hw *hw, u32 value)
1638 {
1639         return -EOPNOTSUPP;
1640 }
1641
1642 static struct ieee80211_ops ath9k_ops = {
1643         .tx                 = ath9k_tx,
1644         .start              = ath9k_start,
1645         .stop               = ath9k_stop,
1646         .add_interface      = ath9k_add_interface,
1647         .remove_interface   = ath9k_remove_interface,
1648         .config             = ath9k_config,
1649         .config_interface   = ath9k_config_interface,
1650         .configure_filter   = ath9k_configure_filter,
1651         .get_stats          = NULL,
1652         .sta_notify         = ath9k_sta_notify,
1653         .conf_tx            = ath9k_conf_tx,
1654         .get_tx_stats       = NULL,
1655         .bss_info_changed   = ath9k_bss_info_changed,
1656         .set_tim            = NULL,
1657         .set_key            = ath9k_set_key,
1658         .hw_scan            = NULL,
1659         .get_tkip_seq       = NULL,
1660         .set_rts_threshold  = NULL,
1661         .set_frag_threshold = NULL,
1662         .set_retry_limit    = NULL,
1663         .get_tsf            = ath9k_get_tsf,
1664         .reset_tsf          = ath9k_reset_tsf,
1665         .tx_last_beacon     = NULL,
1666         .ampdu_action       = ath9k_ampdu_action,
1667         .set_frag_threshold = ath9k_no_fragmentation,
1668 };
1669
1670 static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1671 {
1672         void __iomem *mem;
1673         struct ath_softc *sc;
1674         struct ieee80211_hw *hw;
1675         const char *athname;
1676         u8 csz;
1677         u32 val;
1678         int ret = 0;
1679
1680         if (pci_enable_device(pdev))
1681                 return -EIO;
1682
1683         /* XXX 32-bit addressing only */
1684         if (pci_set_dma_mask(pdev, 0xffffffff)) {
1685                 printk(KERN_ERR "ath_pci: 32-bit DMA not available\n");
1686                 ret = -ENODEV;
1687                 goto bad;
1688         }
1689
1690         /*
1691          * Cache line size is used to size and align various
1692          * structures used to communicate with the hardware.
1693          */
1694         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
1695         if (csz == 0) {
1696                 /*
1697                  * Linux 2.4.18 (at least) writes the cache line size
1698                  * register as a 16-bit wide register which is wrong.
1699                  * We must have this setup properly for rx buffer
1700                  * DMA to work so force a reasonable value here if it
1701                  * comes up zero.
1702                  */
1703                 csz = L1_CACHE_BYTES / sizeof(u32);
1704                 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
1705         }
1706         /*
1707          * The default setting of latency timer yields poor results,
1708          * set it to the value used by other systems. It may be worth
1709          * tweaking this setting more.
1710          */
1711         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
1712
1713         pci_set_master(pdev);
1714
1715         /*
1716          * Disable the RETRY_TIMEOUT register (0x41) to keep
1717          * PCI Tx retries from interfering with C3 CPU state.
1718          */
1719         pci_read_config_dword(pdev, 0x40, &val);
1720         if ((val & 0x0000ff00) != 0)
1721                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1722
1723         ret = pci_request_region(pdev, 0, "ath9k");
1724         if (ret) {
1725                 dev_err(&pdev->dev, "PCI memory region reserve error\n");
1726                 ret = -ENODEV;
1727                 goto bad;
1728         }
1729
1730         mem = pci_iomap(pdev, 0, 0);
1731         if (!mem) {
1732                 printk(KERN_ERR "PCI memory map error\n") ;
1733                 ret = -EIO;
1734                 goto bad1;
1735         }
1736
1737         hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
1738         if (hw == NULL) {
1739                 printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n");
1740                 goto bad2;
1741         }
1742
1743         hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
1744                 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
1745                 IEEE80211_HW_SIGNAL_DBM |
1746                 IEEE80211_HW_NOISE_DBM;
1747
1748         hw->wiphy->interface_modes =
1749                 BIT(NL80211_IFTYPE_AP) |
1750                 BIT(NL80211_IFTYPE_STATION) |
1751                 BIT(NL80211_IFTYPE_ADHOC);
1752
1753         SET_IEEE80211_DEV(hw, &pdev->dev);
1754         pci_set_drvdata(pdev, hw);
1755
1756         sc = hw->priv;
1757         sc->hw = hw;
1758         sc->pdev = pdev;
1759         sc->mem = mem;
1760
1761         if (ath_attach(id->device, sc) != 0) {
1762                 ret = -ENODEV;
1763                 goto bad3;
1764         }
1765
1766         /* setup interrupt service routine */
1767
1768         if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) {
1769                 printk(KERN_ERR "%s: request_irq failed\n",
1770                         wiphy_name(hw->wiphy));
1771                 ret = -EIO;
1772                 goto bad4;
1773         }
1774
1775         athname = ath9k_hw_probe(id->vendor, id->device);
1776
1777         printk(KERN_INFO "%s: %s: mem=0x%lx, irq=%d\n",
1778                wiphy_name(hw->wiphy),
1779                athname ? athname : "Atheros ???",
1780                (unsigned long)mem, pdev->irq);
1781
1782         return 0;
1783 bad4:
1784         ath_detach(sc);
1785 bad3:
1786         ieee80211_free_hw(hw);
1787 bad2:
1788         pci_iounmap(pdev, mem);
1789 bad1:
1790         pci_release_region(pdev, 0);
1791 bad:
1792         pci_disable_device(pdev);
1793         return ret;
1794 }
1795
1796 static void ath_pci_remove(struct pci_dev *pdev)
1797 {
1798         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1799         struct ath_softc *sc = hw->priv;
1800         enum ath9k_int status;
1801
1802         if (pdev->irq) {
1803                 ath9k_hw_set_interrupts(sc->sc_ah, 0);
1804                 /* clear the ISR */
1805                 ath9k_hw_getisr(sc->sc_ah, &status);
1806                 sc->sc_flags |= SC_OP_INVALID;
1807                 free_irq(pdev->irq, sc);
1808         }
1809         ath_detach(sc);
1810
1811         pci_iounmap(pdev, sc->mem);
1812         pci_release_region(pdev, 0);
1813         pci_disable_device(pdev);
1814         ieee80211_free_hw(hw);
1815 }
1816
1817 #ifdef CONFIG_PM
1818
1819 static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
1820 {
1821         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1822         struct ath_softc *sc = hw->priv;
1823
1824         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
1825
1826 #ifdef CONFIG_RFKILL
1827         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1828                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
1829 #endif
1830
1831         pci_save_state(pdev);
1832         pci_disable_device(pdev);
1833         pci_set_power_state(pdev, 3);
1834
1835         return 0;
1836 }
1837
1838 static int ath_pci_resume(struct pci_dev *pdev)
1839 {
1840         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1841         struct ath_softc *sc = hw->priv;
1842         u32 val;
1843         int err;
1844
1845         err = pci_enable_device(pdev);
1846         if (err)
1847                 return err;
1848         pci_restore_state(pdev);
1849         /*
1850          * Suspend/Resume resets the PCI configuration space, so we have to
1851          * re-disable the RETRY_TIMEOUT register (0x41) to keep
1852          * PCI Tx retries from interfering with C3 CPU state
1853          */
1854         pci_read_config_dword(pdev, 0x40, &val);
1855         if ((val & 0x0000ff00) != 0)
1856                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1857
1858         /* Enable LED */
1859         ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
1860                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1861         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
1862
1863 #ifdef CONFIG_RFKILL
1864         /*
1865          * check the h/w rfkill state on resume
1866          * and start the rfkill poll timer
1867          */
1868         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1869                 queue_delayed_work(sc->hw->workqueue,
1870                                    &sc->rf_kill.rfkill_poll, 0);
1871 #endif
1872
1873         return 0;
1874 }
1875
1876 #endif /* CONFIG_PM */
1877
1878 MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
1879
1880 static struct pci_driver ath_pci_driver = {
1881         .name       = "ath9k",
1882         .id_table   = ath_pci_id_table,
1883         .probe      = ath_pci_probe,
1884         .remove     = ath_pci_remove,
1885 #ifdef CONFIG_PM
1886         .suspend    = ath_pci_suspend,
1887         .resume     = ath_pci_resume,
1888 #endif /* CONFIG_PM */
1889 };
1890
1891 static int __init init_ath_pci(void)
1892 {
1893         printk(KERN_INFO "%s: %s\n", dev_info, ATH_PCI_VERSION);
1894
1895         if (pci_register_driver(&ath_pci_driver) < 0) {
1896                 printk(KERN_ERR
1897                         "ath_pci: No devices found, driver not installed.\n");
1898                 pci_unregister_driver(&ath_pci_driver);
1899                 return -ENODEV;
1900         }
1901
1902         return 0;
1903 }
1904 module_init(init_ath_pci);
1905
1906 static void __exit exit_ath_pci(void)
1907 {
1908         pci_unregister_driver(&ath_pci_driver);
1909         printk(KERN_INFO "%s: driver unloaded\n", dev_info);
1910 }
1911 module_exit(exit_ath_pci);