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_IE_CHA_SEC_NONE) &&
  65                     (tx_chan_width == ATH9K_HT_MACMODE_20))
  66                         chanmode = CHANNEL_G_HT20;
  67                 if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_ABOVE) &&
  68                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
  69                         chanmode = CHANNEL_G_HT40PLUS;
  70                 if ((ext_chan_offset == IEEE80211_HT_IE_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_IE_CHA_SEC_NONE) &&
  76                     (tx_chan_width == ATH9K_HT_MACMODE_20))
  77                         chanmode = CHANNEL_A_HT20;
  78                 if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_ABOVE) &&
  79                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
  80                         chanmode = CHANNEL_A_HT40PLUS;
  81                 if ((ext_chan_offset == IEEE80211_HT_IE_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_ht_info *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 = 1;
 224         ht_info->cap = (u16)IEEE80211_HT_CAP_SUP_WIDTH
 225                         |(u16)IEEE80211_HT_CAP_SM_PS
 226                         |(u16)IEEE80211_HT_CAP_SGI_40
 227                         |(u16)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         /* setup supported mcs set */
 232         memset(ht_info->supp_mcs_set, 0, 16);
 233         ht_info->supp_mcs_set[0] = 0xff;
 234         ht_info->supp_mcs_set[1] = 0xff;
 235         ht_info->supp_mcs_set[12] = IEEE80211_HT_CAP_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 #define IEEE80211_HT_CAP_40MHZ_INTOLERANT BIT(14)
 332         struct ath_ht_info *ht_info = &sc->sc_ht_info;
 333
 334         if (bss_conf->assoc_ht) {
 335                 ht_info->ext_chan_offset =
 336                         bss_conf->ht_bss_conf->bss_cap &
 337                                 IEEE80211_HT_IE_CHA_SEC_OFFSET;
 338
 339                 if (!(bss_conf->ht_conf->cap &
 340                         IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
 341                             (bss_conf->ht_bss_conf->bss_cap &
 342                                 IEEE80211_HT_IE_CHA_WIDTH))
 343                         ht_info->tx_chan_width = ATH9K_HT_MACMODE_2040;
 344                 else
 345                         ht_info->tx_chan_width = ATH9K_HT_MACMODE_20;
 346
 347                 ath9k_hw_set11nmac2040(sc->sc_ah, ht_info->tx_chan_width);
 348                 ht_info->maxampdu = 1 << (IEEE80211_HTCAP_MAXRXAMPDU_FACTOR +
 349                                         bss_conf->ht_conf->ampdu_factor);
 350                 ht_info->mpdudensity =
 351                         parse_mpdudensity(bss_conf->ht_conf->ampdu_density);
 352
 353         }
 354
 355 #undef IEEE80211_HT_CAP_40MHZ_INTOLERANT
 356 }
 357
 358 static void ath9k_bss_assoc_info(struct ath_softc *sc,
 359                                  struct ieee80211_bss_conf *bss_conf)
 360 {
 361         struct ieee80211_hw *hw = sc->hw;
 362         struct ieee80211_channel *curchan = hw->conf.channel;
 363         struct ath_vap *avp;
 364         int pos;
 365
 366         if (bss_conf->assoc) {
 367                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Bss Info ASSOC %d\n",
 368                         __func__,
 369                         bss_conf->aid);
 370
 371                 avp = sc->sc_vaps[0];
 372                 if (avp == NULL) {
 373                         DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
 374                                 __func__);
 375                         return;
 376                 }
 377
 378                 /* New association, store aid */
 379                 if (avp->av_opmode == ATH9K_M_STA) {
 380                         sc->sc_curaid = bss_conf->aid;
 381                         ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
 382                                                sc->sc_curaid);
 383                 }
 384
 385                 /* Configure the beacon */
 386                 ath_beacon_config(sc, 0);
 387                 sc->sc_flags |= SC_OP_BEACONS;
 388
 389                 /* Reset rssi stats */
 390                 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER;
 391                 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER;
 392                 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER;
 393                 sc->sc_halstats.ns_avgtxrate = ATH_RATE_DUMMY_MARKER;
 394
 395                 /* Update chainmask */
 396                 ath_update_chainmask(sc, bss_conf->assoc_ht);
 397
 398                 DPRINTF(sc, ATH_DBG_CONFIG,
 399                         "%s: bssid %pM aid 0x%x\n",
 400                         __func__,
 401                         sc->sc_curbssid, sc->sc_curaid);
 402
 403                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
 404                         __func__,
 405                         curchan->center_freq);
 406
 407                 pos = ath_get_channel(sc, curchan);
 408                 if (pos == -1) {
 409                         DPRINTF(sc, ATH_DBG_FATAL,
 410                                 "%s: Invalid channel\n", __func__);
 411                         return;
 412                 }
 413
 414                 if (hw->conf.ht_conf.ht_supported)
 415                         sc->sc_ah->ah_channels[pos].chanmode =
 416                                 ath_get_extchanmode(sc, curchan);
 417                 else
 418                         sc->sc_ah->ah_channels[pos].chanmode =
 419                                 (curchan->band == IEEE80211_BAND_2GHZ) ?
 420                                 CHANNEL_G : CHANNEL_A;
 421
 422                 /* set h/w channel */
 423                 if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
 424                         DPRINTF(sc, ATH_DBG_FATAL,
 425                                 "%s: Unable to set channel\n",
 426                                 __func__);
 427
 428                 ath_rate_newstate(sc, avp);
 429                 /* Update ratectrl about the new state */
 430                 ath_rc_node_update(hw, avp->rc_node);
 431
 432                 /* Start ANI */
 433                 mod_timer(&sc->sc_ani.timer,
 434                         jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
 435
 436         } else {
 437                 DPRINTF(sc, ATH_DBG_CONFIG,
 438                 "%s: Bss Info DISSOC\n", __func__);
 439                 sc->sc_curaid = 0;
 440         }
 441 }
 442
 443 void ath_get_beaconconfig(struct ath_softc *sc,
 444                           int if_id,
 445                           struct ath_beacon_config *conf)
 446 {
 447         struct ieee80211_hw *hw = sc->hw;
 448
 449         /* fill in beacon config data */
 450
 451         conf->beacon_interval = hw->conf.beacon_int;
 452         conf->listen_interval = 100;
 453         conf->dtim_count = 1;
 454         conf->bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf->listen_interval;
 455 }
 456
 457 void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
 458                      struct ath_xmit_status *tx_status, struct ath_node *an)
 459 {
 460         struct ieee80211_hw *hw = sc->hw;
 461         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 462
 463         DPRINTF(sc, ATH_DBG_XMIT,
 464                 "%s: TX complete: skb: %p\n", __func__, skb);
 465
 466         if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK ||
 467                 tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
 468                 /* free driver's private data area of tx_info */
 469                 if (tx_info->driver_data[0] != NULL)
 470                         kfree(tx_info->driver_data[0]);
 471                         tx_info->driver_data[0] = NULL;
 472         }
 473
 474         if (tx_status->flags & ATH_TX_BAR) {
 475                 tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
 476                 tx_status->flags &= ~ATH_TX_BAR;
 477         }
 478
 479         if (tx_status->flags & (ATH_TX_ERROR | ATH_TX_XRETRY)) {
 480                 if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 481                         /* Frame was not ACKed, but an ACK was expected */
 482                         tx_info->status.excessive_retries = 1;
 483                 }
 484         } else {
 485                 /* Frame was ACKed */
 486                 tx_info->flags |= IEEE80211_TX_STAT_ACK;
 487         }
 488
 489         tx_info->status.retry_count = tx_status->retries;
 490
 491         ieee80211_tx_status(hw, skb);
 492         if (an)
 493                 ath_node_put(sc, an, ATH9K_BH_STATUS_CHANGE);
 494 }
 495
 496 int _ath_rx_indicate(struct ath_softc *sc,
 497                      struct sk_buff *skb,
 498                      struct ath_recv_status *status,
 499                      u16 keyix)
 500 {
 501         struct ieee80211_hw *hw = sc->hw;
 502         struct ath_node *an = NULL;
 503         struct ieee80211_rx_status rx_status;
 504         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 505         int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 506         int padsize;
 507         enum ATH_RX_TYPE st;
 508
 509         /* see if any padding is done by the hw and remove it */
 510         if (hdrlen & 3) {
 511                 padsize = hdrlen % 4;
 512                 memmove(skb->data + padsize, skb->data, hdrlen);
 513                 skb_pull(skb, padsize);
 514         }
 515
 516         /* Prepare rx status */
 517         ath9k_rx_prepare(sc, skb, status, &rx_status);
 518
 519         if (!(keyix == ATH9K_RXKEYIX_INVALID) &&
 520             !(status->flags & ATH_RX_DECRYPT_ERROR)) {
 521                 rx_status.flag |= RX_FLAG_DECRYPTED;
 522         } else if ((le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_PROTECTED)
 523                    && !(status->flags & ATH_RX_DECRYPT_ERROR)
 524                    && skb->len >= hdrlen + 4) {
 525                 keyix = skb->data[hdrlen + 3] >> 6;
 526
 527                 if (test_bit(keyix, sc->sc_keymap))
 528                         rx_status.flag |= RX_FLAG_DECRYPTED;
 529         }
 530
 531         spin_lock_bh(&sc->node_lock);
 532         an = ath_node_find(sc, hdr->addr2);
 533         spin_unlock_bh(&sc->node_lock);
 534
 535         if (an) {
 536                 ath_rx_input(sc, an,
 537                              hw->conf.ht_conf.ht_supported,
 538                              skb, status, &st);
 539         }
 540         if (!an || (st != ATH_RX_CONSUMED))
 541                 __ieee80211_rx(hw, skb, &rx_status);
 542
 543         return 0;
 544 }
 545
 546 int ath_rx_subframe(struct ath_node *an,
 547                     struct sk_buff *skb,
 548                     struct ath_recv_status *status)
 549 {
 550         struct ath_softc *sc = an->an_sc;
 551         struct ieee80211_hw *hw = sc->hw;
 552         struct ieee80211_rx_status rx_status;
 553
 554         /* Prepare rx status */
 555         ath9k_rx_prepare(sc, skb, status, &rx_status);
 556         if (!(status->flags & ATH_RX_DECRYPT_ERROR))
 557                 rx_status.flag |= RX_FLAG_DECRYPTED;
 558
 559         __ieee80211_rx(hw, skb, &rx_status);
 560
 561         return 0;
 562 }
 563
 564 /********************************/
 565 /*       LED functions          */
 566 /********************************/
 567
 568 static void ath_led_brightness(struct led_classdev *led_cdev,
 569                                enum led_brightness brightness)
 570 {
 571         struct ath_led *led = container_of(led_cdev, struct ath_led, led_cdev);
 572         struct ath_softc *sc = led->sc;
 573
 574         switch (brightness) {
 575         case LED_OFF:
 576                 if (led->led_type == ATH_LED_ASSOC ||
 577                     led->led_type == ATH_LED_RADIO)
 578                         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
 579                 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN,
 580                                 (led->led_type == ATH_LED_RADIO) ? 1 :
 581                                 !!(sc->sc_flags & SC_OP_LED_ASSOCIATED));
 582                 break;
 583         case LED_FULL:
 584                 if (led->led_type == ATH_LED_ASSOC)
 585                         sc->sc_flags |= SC_OP_LED_ASSOCIATED;
 586                 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 0);
 587                 break;
 588         default:
 589                 break;
 590         }
 591 }
 592
 593 static int ath_register_led(struct ath_softc *sc, struct ath_led *led,
 594                             char *trigger)
 595 {
 596         int ret;
 597
 598         led->sc = sc;
 599         led->led_cdev.name = led->name;
 600         led->led_cdev.default_trigger = trigger;
 601         led->led_cdev.brightness_set = ath_led_brightness;
 602
 603         ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->led_cdev);
 604         if (ret)
 605                 DPRINTF(sc, ATH_DBG_FATAL,
 606                         "Failed to register led:%s", led->name);
 607         else
 608                 led->registered = 1;
 609         return ret;
 610 }
 611
 612 static void ath_unregister_led(struct ath_led *led)
 613 {
 614         if (led->registered) {
 615                 led_classdev_unregister(&led->led_cdev);
 616                 led->registered = 0;
 617         }
 618 }
 619
 620 static void ath_deinit_leds(struct ath_softc *sc)
 621 {
 622         ath_unregister_led(&sc->assoc_led);
 623         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
 624         ath_unregister_led(&sc->tx_led);
 625         ath_unregister_led(&sc->rx_led);
 626         ath_unregister_led(&sc->radio_led);
 627         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
 628 }
 629
 630 static void ath_init_leds(struct ath_softc *sc)
 631 {
 632         char *trigger;
 633         int ret;
 634
 635         /* Configure gpio 1 for output */
 636         ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
 637                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 638         /* LED off, active low */
 639         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
 640
 641         trigger = ieee80211_get_radio_led_name(sc->hw);
 642         snprintf(sc->radio_led.name, sizeof(sc->radio_led.name),
 643                 "ath9k-%s:radio", wiphy_name(sc->hw->wiphy));
 644         ret = ath_register_led(sc, &sc->radio_led, trigger);
 645         sc->radio_led.led_type = ATH_LED_RADIO;
 646         if (ret)
 647                 goto fail;
 648
 649         trigger = ieee80211_get_assoc_led_name(sc->hw);
 650         snprintf(sc->assoc_led.name, sizeof(sc->assoc_led.name),
 651                 "ath9k-%s:assoc", wiphy_name(sc->hw->wiphy));
 652         ret = ath_register_led(sc, &sc->assoc_led, trigger);
 653         sc->assoc_led.led_type = ATH_LED_ASSOC;
 654         if (ret)
 655                 goto fail;
 656
 657         trigger = ieee80211_get_tx_led_name(sc->hw);
 658         snprintf(sc->tx_led.name, sizeof(sc->tx_led.name),
 659                 "ath9k-%s:tx", wiphy_name(sc->hw->wiphy));
 660         ret = ath_register_led(sc, &sc->tx_led, trigger);
 661         sc->tx_led.led_type = ATH_LED_TX;
 662         if (ret)
 663                 goto fail;
 664
 665         trigger = ieee80211_get_rx_led_name(sc->hw);
 666         snprintf(sc->rx_led.name, sizeof(sc->rx_led.name),
 667                 "ath9k-%s:rx", wiphy_name(sc->hw->wiphy));
 668         ret = ath_register_led(sc, &sc->rx_led, trigger);
 669         sc->rx_led.led_type = ATH_LED_RX;
 670         if (ret)
 671                 goto fail;
 672
 673         return;
 674
 675 fail:
 676         ath_deinit_leds(sc);
 677 }
 678
 679 #ifdef CONFIG_RFKILL
 680 /*******************/
 681 /*      Rfkill     */
 682 /*******************/
 683
 684 static void ath_radio_enable(struct ath_softc *sc)
 685 {
 686         struct ath_hal *ah = sc->sc_ah;
 687         int status;
 688
 689         spin_lock_bh(&sc->sc_resetlock);
 690         if (!ath9k_hw_reset(ah, ah->ah_curchan,
 691                             sc->sc_ht_info.tx_chan_width,
 692                             sc->sc_tx_chainmask,
 693                             sc->sc_rx_chainmask,
 694                             sc->sc_ht_extprotspacing,
 695                             false, &status)) {
 696                 DPRINTF(sc, ATH_DBG_FATAL,
 697                         "%s: unable to reset channel %u (%uMhz) "
 698                         "flags 0x%x hal status %u\n", __func__,
 699                         ath9k_hw_mhz2ieee(ah,
 700                                           ah->ah_curchan->channel,
 701                                           ah->ah_curchan->channelFlags),
 702                         ah->ah_curchan->channel,
 703                         ah->ah_curchan->channelFlags, status);
 704         }
 705         spin_unlock_bh(&sc->sc_resetlock);
 706
 707         ath_update_txpow(sc);
 708         if (ath_startrecv(sc) != 0) {
 709                 DPRINTF(sc, ATH_DBG_FATAL,
 710                         "%s: unable to restart recv logic\n", __func__);
 711                 return;
 712         }
 713
 714         if (sc->sc_flags & SC_OP_BEACONS)
 715                 ath_beacon_config(sc, ATH_IF_ID_ANY);   /* restart beacons */
 716
 717         /* Re-Enable  interrupts */
 718         ath9k_hw_set_interrupts(ah, sc->sc_imask);
 719
 720         /* Enable LED */
 721         ath9k_hw_cfg_output(ah, ATH_LED_PIN,
 722                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 723         ath9k_hw_set_gpio(ah, ATH_LED_PIN, 0);
 724
 725         ieee80211_wake_queues(sc->hw);
 726 }
 727
 728 static void ath_radio_disable(struct ath_softc *sc)
 729 {
 730         struct ath_hal *ah = sc->sc_ah;
 731         int status;
 732
 733
 734         ieee80211_stop_queues(sc->hw);
 735
 736         /* Disable LED */
 737         ath9k_hw_set_gpio(ah, ATH_LED_PIN, 1);
 738         ath9k_hw_cfg_gpio_input(ah, ATH_LED_PIN);
 739
 740         /* Disable interrupts */
 741         ath9k_hw_set_interrupts(ah, 0);
 742
 743         ath_draintxq(sc, false);        /* clear pending tx frames */
 744         ath_stoprecv(sc);               /* turn off frame recv */
 745         ath_flushrecv(sc);              /* flush recv queue */
 746
 747         spin_lock_bh(&sc->sc_resetlock);
 748         if (!ath9k_hw_reset(ah, ah->ah_curchan,
 749                             sc->sc_ht_info.tx_chan_width,
 750                             sc->sc_tx_chainmask,
 751                             sc->sc_rx_chainmask,
 752                             sc->sc_ht_extprotspacing,
 753                             false, &status)) {
 754                 DPRINTF(sc, ATH_DBG_FATAL,
 755                         "%s: unable to reset channel %u (%uMhz) "
 756                         "flags 0x%x hal status %u\n", __func__,
 757                         ath9k_hw_mhz2ieee(ah,
 758                                 ah->ah_curchan->channel,
 759                                 ah->ah_curchan->channelFlags),
 760                         ah->ah_curchan->channel,
 761                         ah->ah_curchan->channelFlags, status);
 762         }
 763         spin_unlock_bh(&sc->sc_resetlock);
 764
 765         ath9k_hw_phy_disable(ah);
 766         ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP);
 767 }
 768
 769 static bool ath_is_rfkill_set(struct ath_softc *sc)
 770 {
 771         struct ath_hal *ah = sc->sc_ah;
 772
 773         return ath9k_hw_gpio_get(ah, ah->ah_rfkill_gpio) ==
 774                                   ah->ah_rfkill_polarity;
 775 }
 776
 777 /* h/w rfkill poll function */
 778 static void ath_rfkill_poll(struct work_struct *work)
 779 {
 780         struct ath_softc *sc = container_of(work, struct ath_softc,
 781                                             rf_kill.rfkill_poll.work);
 782         bool radio_on;
 783
 784         if (sc->sc_flags & SC_OP_INVALID)
 785                 return;
 786
 787         radio_on = !ath_is_rfkill_set(sc);
 788
 789         /*
 790          * enable/disable radio only when there is a
 791          * state change in RF switch
 792          */
 793         if (radio_on == !!(sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED)) {
 794                 enum rfkill_state state;
 795
 796                 if (sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED) {
 797                         state = radio_on ? RFKILL_STATE_SOFT_BLOCKED
 798                                 : RFKILL_STATE_HARD_BLOCKED;
 799                 } else if (radio_on) {
 800                         ath_radio_enable(sc);
 801                         state = RFKILL_STATE_UNBLOCKED;
 802                 } else {
 803                         ath_radio_disable(sc);
 804                         state = RFKILL_STATE_HARD_BLOCKED;
 805                 }
 806
 807                 if (state == RFKILL_STATE_HARD_BLOCKED)
 808                         sc->sc_flags |= SC_OP_RFKILL_HW_BLOCKED;
 809                 else
 810                         sc->sc_flags &= ~SC_OP_RFKILL_HW_BLOCKED;
 811
 812                 rfkill_force_state(sc->rf_kill.rfkill, state);
 813         }
 814
 815         queue_delayed_work(sc->hw->workqueue, &sc->rf_kill.rfkill_poll,
 816                            msecs_to_jiffies(ATH_RFKILL_POLL_INTERVAL));
 817 }
 818
 819 /* s/w rfkill handler */
 820 static int ath_sw_toggle_radio(void *data, enum rfkill_state state)
 821 {
 822         struct ath_softc *sc = data;
 823
 824         switch (state) {
 825         case RFKILL_STATE_SOFT_BLOCKED:
 826                 if (!(sc->sc_flags & (SC_OP_RFKILL_HW_BLOCKED |
 827                     SC_OP_RFKILL_SW_BLOCKED)))
 828                         ath_radio_disable(sc);
 829                 sc->sc_flags |= SC_OP_RFKILL_SW_BLOCKED;
 830                 return 0;
 831         case RFKILL_STATE_UNBLOCKED:
 832                 if ((sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED)) {
 833                         sc->sc_flags &= ~SC_OP_RFKILL_SW_BLOCKED;
 834                         if (sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED) {
 835                                 DPRINTF(sc, ATH_DBG_FATAL, "Can't turn on the"
 836                                         "radio as it is disabled by h/w \n");
 837                                 return -EPERM;
 838                         }
 839                         ath_radio_enable(sc);
 840                 }
 841                 return 0;
 842         default:
 843                 return -EINVAL;
 844         }
 845 }
 846
 847 /* Init s/w rfkill */
 848 static int ath_init_sw_rfkill(struct ath_softc *sc)
 849 {
 850         sc->rf_kill.rfkill = rfkill_allocate(wiphy_dev(sc->hw->wiphy),
 851                                              RFKILL_TYPE_WLAN);
 852         if (!sc->rf_kill.rfkill) {
 853                 DPRINTF(sc, ATH_DBG_FATAL, "Failed to allocate rfkill\n");
 854                 return -ENOMEM;
 855         }
 856
 857         snprintf(sc->rf_kill.rfkill_name, sizeof(sc->rf_kill.rfkill_name),
 858                 "ath9k-%s:rfkill", wiphy_name(sc->hw->wiphy));
 859         sc->rf_kill.rfkill->name = sc->rf_kill.rfkill_name;
 860         sc->rf_kill.rfkill->data = sc;
 861         sc->rf_kill.rfkill->toggle_radio = ath_sw_toggle_radio;
 862         sc->rf_kill.rfkill->state = RFKILL_STATE_UNBLOCKED;
 863         sc->rf_kill.rfkill->user_claim_unsupported = 1;
 864
 865         return 0;
 866 }
 867
 868 /* Deinitialize rfkill */
 869 static void ath_deinit_rfkill(struct ath_softc *sc)
 870 {
 871         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
 872                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
 873
 874         if (sc->sc_flags & SC_OP_RFKILL_REGISTERED) {
 875                 rfkill_unregister(sc->rf_kill.rfkill);
 876                 sc->sc_flags &= ~SC_OP_RFKILL_REGISTERED;
 877                 sc->rf_kill.rfkill = NULL;
 878         }
 879 }
 880 #endif /* CONFIG_RFKILL */
 881
 882 static int ath_detach(struct ath_softc *sc)
 883 {
 884         struct ieee80211_hw *hw = sc->hw;
 885
 886         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach ATH hw\n", __func__);
 887
 888         /* Deinit LED control */
 889         ath_deinit_leds(sc);
 890
 891 #ifdef CONFIG_RFKILL
 892         /* deinit rfkill */
 893         ath_deinit_rfkill(sc);
 894 #endif
 895
 896         /* Unregister hw */
 897
 898         ieee80211_unregister_hw(hw);
 899
 900         /* unregister Rate control */
 901         ath_rate_control_unregister();
 902
 903         /* tx/rx cleanup */
 904
 905         ath_rx_cleanup(sc);
 906         ath_tx_cleanup(sc);
 907
 908         /* Deinit */
 909
 910         ath_deinit(sc);
 911
 912         return 0;
 913 }
 914
 915 static int ath_attach(u16 devid,
 916                       struct ath_softc *sc)
 917 {
 918         struct ieee80211_hw *hw = sc->hw;
 919         int error = 0;
 920
 921         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach ATH hw\n", __func__);
 922
 923         error = ath_init(devid, sc);
 924         if (error != 0)
 925                 return error;
 926
 927         /* Init nodes */
 928
 929         INIT_LIST_HEAD(&sc->node_list);
 930         spin_lock_init(&sc->node_lock);
 931
 932         /* get mac address from hardware and set in mac80211 */
 933
 934         SET_IEEE80211_PERM_ADDR(hw, sc->sc_myaddr);
 935
 936         /* setup channels and rates */
 937
 938         sc->sbands[IEEE80211_BAND_2GHZ].channels =
 939                 sc->channels[IEEE80211_BAND_2GHZ];
 940         sc->sbands[IEEE80211_BAND_2GHZ].bitrates =
 941                 sc->rates[IEEE80211_BAND_2GHZ];
 942         sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
 943
 944         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
 945                 /* Setup HT capabilities for 2.4Ghz*/
 946                 setup_ht_cap(&sc->sbands[IEEE80211_BAND_2GHZ].ht_info);
 947
 948         hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 949                 &sc->sbands[IEEE80211_BAND_2GHZ];
 950
 951         if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes)) {
 952                 sc->sbands[IEEE80211_BAND_5GHZ].channels =
 953                         sc->channels[IEEE80211_BAND_5GHZ];
 954                 sc->sbands[IEEE80211_BAND_5GHZ].bitrates =
 955                         sc->rates[IEEE80211_BAND_5GHZ];
 956                 sc->sbands[IEEE80211_BAND_5GHZ].band =
 957                         IEEE80211_BAND_5GHZ;
 958
 959                 if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
 960                         /* Setup HT capabilities for 5Ghz*/
 961                         setup_ht_cap(&sc->sbands[IEEE80211_BAND_5GHZ].ht_info);
 962
 963                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 964                         &sc->sbands[IEEE80211_BAND_5GHZ];
 965         }
 966
 967         /* FIXME: Have to figure out proper hw init values later */
 968
 969         hw->queues = 4;
 970         hw->ampdu_queues = 1;
 971
 972         /* Register rate control */
 973         hw->rate_control_algorithm = "ath9k_rate_control";
 974         error = ath_rate_control_register();
 975         if (error != 0) {
 976                 DPRINTF(sc, ATH_DBG_FATAL,
 977                         "%s: Unable to register rate control "
 978                         "algorithm:%d\n", __func__, error);
 979                 ath_rate_control_unregister();
 980                 goto bad;
 981         }
 982
 983         error = ieee80211_register_hw(hw);
 984         if (error != 0) {
 985                 ath_rate_control_unregister();
 986                 goto bad;
 987         }
 988
 989         /* Initialize LED control */
 990         ath_init_leds(sc);
 991
 992 #ifdef CONFIG_RFKILL
 993         /* Initialze h/w Rfkill */
 994         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
 995                 INIT_DELAYED_WORK(&sc->rf_kill.rfkill_poll, ath_rfkill_poll);
 996
 997         /* Initialize s/w rfkill */
 998         if (ath_init_sw_rfkill(sc))
 999                 goto detach;
1000 #endif
1001
1002         /* initialize tx/rx engine */
1003
1004         error = ath_tx_init(sc, ATH_TXBUF);
1005         if (error != 0)
1006                 goto detach;
1007
1008         error = ath_rx_init(sc, ATH_RXBUF);
1009         if (error != 0)
1010                 goto detach;
1011
1012         return 0;
1013 detach:
1014         ath_detach(sc);
1015 bad:
1016         return error;
1017 }
1018
1019 static int ath9k_start(struct ieee80211_hw *hw)
1020 {
1021         struct ath_softc *sc = hw->priv;
1022         struct ieee80211_channel *curchan = hw->conf.channel;
1023         int error = 0, pos;
1024
1025         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Starting driver with "
1026                 "initial channel: %d MHz\n", __func__, curchan->center_freq);
1027
1028         /* setup initial channel */
1029
1030         pos = ath_get_channel(sc, curchan);
1031         if (pos == -1) {
1032                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
1033                 return -EINVAL;
1034         }
1035
1036         sc->sc_ah->ah_channels[pos].chanmode =
1037                 (curchan->band == IEEE80211_BAND_2GHZ) ? CHANNEL_G : CHANNEL_A;
1038
1039         /* open ath_dev */
1040         error = ath_open(sc, &sc->sc_ah->ah_channels[pos]);
1041         if (error) {
1042                 DPRINTF(sc, ATH_DBG_FATAL,
1043                         "%s: Unable to complete ath_open\n", __func__);
1044                 return error;
1045         }
1046
1047 #ifdef CONFIG_RFKILL
1048         /* Start rfkill polling */
1049         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1050                 queue_delayed_work(sc->hw->workqueue,
1051                                    &sc->rf_kill.rfkill_poll, 0);
1052
1053         if (!(sc->sc_flags & SC_OP_RFKILL_REGISTERED)) {
1054                 if (rfkill_register(sc->rf_kill.rfkill)) {
1055                         DPRINTF(sc, ATH_DBG_FATAL,
1056                                         "Unable to register rfkill\n");
1057                         rfkill_free(sc->rf_kill.rfkill);
1058
1059                         /* Deinitialize the device */
1060                         if (sc->pdev->irq)
1061                                 free_irq(sc->pdev->irq, sc);
1062                         ath_detach(sc);
1063                         pci_iounmap(sc->pdev, sc->mem);
1064                         pci_release_region(sc->pdev, 0);
1065                         pci_disable_device(sc->pdev);
1066                         ieee80211_free_hw(hw);
1067                         return -EIO;
1068                 } else {
1069                         sc->sc_flags |= SC_OP_RFKILL_REGISTERED;
1070                 }
1071         }
1072 #endif
1073
1074         ieee80211_wake_queues(hw);
1075         return 0;
1076 }
1077
1078 static int ath9k_tx(struct ieee80211_hw *hw,
1079                     struct sk_buff *skb)
1080 {
1081         struct ath_softc *sc = hw->priv;
1082         int hdrlen, padsize;
1083         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1084
1085         /*
1086          * As a temporary workaround, assign seq# here; this will likely need
1087          * to be cleaned up to work better with Beacon transmission and virtual
1088          * BSSes.
1089          */
1090         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1091                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1092                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
1093                         sc->seq_no += 0x10;
1094                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1095                 hdr->seq_ctrl |= cpu_to_le16(sc->seq_no);
1096         }
1097
1098         /* Add the padding after the header if this is not already done */
1099         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1100         if (hdrlen & 3) {
1101                 padsize = hdrlen % 4;
1102                 if (skb_headroom(skb) < padsize)
1103                         return -1;
1104                 skb_push(skb, padsize);
1105                 memmove(skb->data, skb->data + padsize, hdrlen);
1106         }
1107
1108         DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting packet, skb: %p\n",
1109                 __func__,
1110                 skb);
1111
1112         if (ath_tx_start(sc, skb) != 0) {
1113                 DPRINTF(sc, ATH_DBG_XMIT, "%s: TX failed\n", __func__);
1114                 dev_kfree_skb_any(skb);
1115                 /* FIXME: Check for proper return value from ATH_DEV */
1116                 return 0;
1117         }
1118
1119         return 0;
1120 }
1121
1122 static void ath9k_stop(struct ieee80211_hw *hw)
1123 {
1124         struct ath_softc *sc = hw->priv;
1125         int error;
1126
1127         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Driver halt\n", __func__);
1128
1129         error = ath_suspend(sc);
1130         if (error)
1131                 DPRINTF(sc, ATH_DBG_CONFIG,
1132                         "%s: Device is no longer present\n", __func__);
1133
1134         ieee80211_stop_queues(hw);
1135
1136 #ifdef CONFIG_RFKILL
1137         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1138                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
1139 #endif
1140 }
1141
1142 static int ath9k_add_interface(struct ieee80211_hw *hw,
1143                                struct ieee80211_if_init_conf *conf)
1144 {
1145         struct ath_softc *sc = hw->priv;
1146         int error, ic_opmode = 0;
1147
1148         /* Support only vap for now */
1149
1150         if (sc->sc_nvaps)
1151                 return -ENOBUFS;
1152
1153         switch (conf->type) {
1154         case NL80211_IFTYPE_STATION:
1155                 ic_opmode = ATH9K_M_STA;
1156                 break;
1157         case NL80211_IFTYPE_ADHOC:
1158                 ic_opmode = ATH9K_M_IBSS;
1159                 break;
1160         case NL80211_IFTYPE_AP:
1161                 ic_opmode = ATH9K_M_HOSTAP;
1162                 break;
1163         default:
1164                 DPRINTF(sc, ATH_DBG_FATAL,
1165                         "%s: Interface type %d not yet supported\n",
1166                         __func__, conf->type);
1167                 return -EOPNOTSUPP;
1168         }
1169
1170         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a VAP of type: %d\n",
1171                 __func__,
1172                 ic_opmode);
1173
1174         error = ath_vap_attach(sc, 0, conf->vif, ic_opmode);
1175         if (error) {
1176                 DPRINTF(sc, ATH_DBG_FATAL,
1177                         "%s: Unable to attach vap, error: %d\n",
1178                         __func__, error);
1179                 return error;
1180         }
1181
1182         if (conf->type == NL80211_IFTYPE_AP) {
1183                 /* TODO: is this a suitable place to start ANI for AP mode? */
1184                 /* Start ANI */
1185                 mod_timer(&sc->sc_ani.timer,
1186                           jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
1187         }
1188
1189         return 0;
1190 }
1191
1192 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1193                                    struct ieee80211_if_init_conf *conf)
1194 {
1195         struct ath_softc *sc = hw->priv;
1196         struct ath_vap *avp;
1197         int error;
1198
1199         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach VAP\n", __func__);
1200
1201         avp = sc->sc_vaps[0];
1202         if (avp == NULL) {
1203                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
1204                         __func__);
1205                 return;
1206         }
1207
1208 #ifdef CONFIG_SLOW_ANT_DIV
1209         ath_slow_ant_div_stop(&sc->sc_antdiv);
1210 #endif
1211         /* Stop ANI */
1212         del_timer_sync(&sc->sc_ani.timer);
1213
1214         /* Update ratectrl */
1215         ath_rate_newstate(sc, avp);
1216
1217         /* Reclaim beacon resources */
1218         if (sc->sc_ah->ah_opmode == ATH9K_M_HOSTAP ||
1219             sc->sc_ah->ah_opmode == ATH9K_M_IBSS) {
1220                 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
1221                 ath_beacon_return(sc, avp);
1222         }
1223
1224         /* Set interrupt mask */
1225         sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1226         ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_imask & ~ATH9K_INT_GLOBAL);
1227         sc->sc_flags &= ~SC_OP_BEACONS;
1228
1229         error = ath_vap_detach(sc, 0);
1230         if (error)
1231                 DPRINTF(sc, ATH_DBG_FATAL,
1232                         "%s: Unable to detach vap, error: %d\n",
1233                         __func__, error);
1234 }
1235
1236 static int ath9k_config(struct ieee80211_hw *hw,
1237                         struct ieee80211_conf *conf)
1238 {
1239         struct ath_softc *sc = hw->priv;
1240         struct ieee80211_channel *curchan = hw->conf.channel;
1241         int pos;
1242
1243         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
1244                 __func__,
1245                 curchan->center_freq);
1246
1247         pos = ath_get_channel(sc, curchan);
1248         if (pos == -1) {
1249                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
1250                 return -EINVAL;
1251         }
1252
1253         sc->sc_ah->ah_channels[pos].chanmode =
1254                 (curchan->band == IEEE80211_BAND_2GHZ) ?
1255                 CHANNEL_G : CHANNEL_A;
1256
1257         if (sc->sc_curaid && hw->conf.ht_conf.ht_supported)
1258                 sc->sc_ah->ah_channels[pos].chanmode =
1259                         ath_get_extchanmode(sc, curchan);
1260
1261         sc->sc_config.txpowlimit = 2 * conf->power_level;
1262
1263         /* set h/w channel */
1264         if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
1265                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Unable to set channel\n",
1266                         __func__);
1267
1268         return 0;
1269 }
1270
1271 static int ath9k_config_interface(struct ieee80211_hw *hw,
1272                                   struct ieee80211_vif *vif,
1273                                   struct ieee80211_if_conf *conf)
1274 {
1275         struct ath_softc *sc = hw->priv;
1276         struct ath_hal *ah = sc->sc_ah;
1277         struct ath_vap *avp;
1278         u32 rfilt = 0;
1279         int error, i;
1280
1281         avp = sc->sc_vaps[0];
1282         if (avp == NULL) {
1283                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
1284                         __func__);
1285                 return -EINVAL;
1286         }
1287
1288         /* TODO: Need to decide which hw opmode to use for multi-interface
1289          * cases */
1290         if (vif->type == NL80211_IFTYPE_AP &&
1291             ah->ah_opmode != ATH9K_M_HOSTAP) {
1292                 ah->ah_opmode = ATH9K_M_HOSTAP;
1293                 ath9k_hw_setopmode(ah);
1294                 ath9k_hw_write_associd(ah, sc->sc_myaddr, 0);
1295                 /* Request full reset to get hw opmode changed properly */
1296                 sc->sc_flags |= SC_OP_FULL_RESET;
1297         }
1298
1299         if ((conf->changed & IEEE80211_IFCC_BSSID) &&
1300             !is_zero_ether_addr(conf->bssid)) {
1301                 switch (vif->type) {
1302                 case NL80211_IFTYPE_STATION:
1303                 case NL80211_IFTYPE_ADHOC:
1304                         /* Update ratectrl about the new state */
1305                         ath_rate_newstate(sc, avp);
1306
1307                         /* Set BSSID */
1308                         memcpy(sc->sc_curbssid, conf->bssid, ETH_ALEN);
1309                         sc->sc_curaid = 0;
1310                         ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
1311                                                sc->sc_curaid);
1312
1313                         /* Set aggregation protection mode parameters */
1314                         sc->sc_config.ath_aggr_prot = 0;
1315
1316                         /*
1317                          * Reset our TSF so that its value is lower than the
1318                          * beacon that we are trying to catch.
1319                          * Only then hw will update its TSF register with the
1320                          * new beacon. Reset the TSF before setting the BSSID
1321                          * to avoid allowing in any frames that would update
1322                          * our TSF only to have us clear it
1323                          * immediately thereafter.
1324                          */
1325                         ath9k_hw_reset_tsf(sc->sc_ah);
1326
1327                         /* Disable BMISS interrupt when we're not associated */
1328                         ath9k_hw_set_interrupts(sc->sc_ah,
1329                                         sc->sc_imask &
1330                                         ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS));
1331                         sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1332
1333                         DPRINTF(sc, ATH_DBG_CONFIG,
1334                                 "%s: RX filter 0x%x bssid %pM aid 0x%x\n",
1335                                 __func__, rfilt,
1336                                 sc->sc_curbssid, sc->sc_curaid);
1337
1338                         /* need to reconfigure the beacon */
1339                         sc->sc_flags &= ~SC_OP_BEACONS ;
1340
1341                         break;
1342                 default:
1343                         break;
1344                 }
1345         }
1346
1347         if ((conf->changed & IEEE80211_IFCC_BEACON) &&
1348             ((vif->type == NL80211_IFTYPE_ADHOC) ||
1349              (vif->type == NL80211_IFTYPE_AP))) {
1350                 /*
1351                  * Allocate and setup the beacon frame.
1352                  *
1353                  * Stop any previous beacon DMA.  This may be
1354                  * necessary, for example, when an ibss merge
1355                  * causes reconfiguration; we may be called
1356                  * with beacon transmission active.
1357                  */
1358                 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
1359
1360                 error = ath_beacon_alloc(sc, 0);
1361                 if (error != 0)
1362                         return error;
1363
1364                 ath_beacon_sync(sc, 0);
1365         }
1366
1367         /* Check for WLAN_CAPABILITY_PRIVACY ? */
1368         if ((avp->av_opmode != NL80211_IFTYPE_STATION)) {
1369                 for (i = 0; i < IEEE80211_WEP_NKID; i++)
1370                         if (ath9k_hw_keyisvalid(sc->sc_ah, (u16)i))
1371                                 ath9k_hw_keysetmac(sc->sc_ah,
1372                                                    (u16)i,
1373                                                    sc->sc_curbssid);
1374         }
1375
1376         /* Only legacy IBSS for now */
1377         if (vif->type == NL80211_IFTYPE_ADHOC)
1378                 ath_update_chainmask(sc, 0);
1379
1380         return 0;
1381 }
1382
1383 #define SUPPORTED_FILTERS                       \
1384         (FIF_PROMISC_IN_BSS |                   \
1385         FIF_ALLMULTI |                          \
1386         FIF_CONTROL |                           \
1387         FIF_OTHER_BSS |                         \
1388         FIF_BCN_PRBRESP_PROMISC |               \
1389         FIF_FCSFAIL)
1390
1391 /* FIXME: sc->sc_full_reset ? */
1392 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1393                                    unsigned int changed_flags,
1394                                    unsigned int *total_flags,
1395                                    int mc_count,
1396                                    struct dev_mc_list *mclist)
1397 {
1398         struct ath_softc *sc = hw->priv;
1399         u32 rfilt;
1400
1401         changed_flags &= SUPPORTED_FILTERS;
1402         *total_flags &= SUPPORTED_FILTERS;
1403
1404         sc->rx_filter = *total_flags;
1405         rfilt = ath_calcrxfilter(sc);
1406         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1407
1408         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1409                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1410                         ath9k_hw_write_associd(sc->sc_ah, ath_bcast_mac, 0);
1411         }
1412
1413         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set HW RX filter: 0x%x\n",
1414                 __func__, sc->rx_filter);
1415 }
1416
1417 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1418                              struct ieee80211_vif *vif,
1419                              enum sta_notify_cmd cmd,
1420                              struct ieee80211_sta *sta)
1421 {
1422         struct ath_softc *sc = hw->priv;
1423         struct ath_node *an;
1424         unsigned long flags;
1425
1426         spin_lock_irqsave(&sc->node_lock, flags);
1427         an = ath_node_find(sc, sta->addr);
1428         spin_unlock_irqrestore(&sc->node_lock, flags);
1429
1430         switch (cmd) {
1431         case STA_NOTIFY_ADD:
1432                 spin_lock_irqsave(&sc->node_lock, flags);
1433                 if (!an) {
1434                         ath_node_attach(sc, sta->addr, 0);
1435                         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a node: %pM\n",
1436                                 __func__, sta->addr);
1437                 } else {
1438                         ath_node_get(sc, sta->addr);
1439                 }
1440                 spin_unlock_irqrestore(&sc->node_lock, flags);
1441                 break;
1442         case STA_NOTIFY_REMOVE:
1443                 if (!an)
1444                         DPRINTF(sc, ATH_DBG_FATAL,
1445                                 "%s: Removal of a non-existent node\n",
1446                                 __func__);
1447                 else {
1448                         ath_node_put(sc, an, ATH9K_BH_STATUS_INTACT);
1449                         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Put a node: %pM\n",
1450                                 __func__,
1451                                 sta->addr);
1452                 }
1453                 break;
1454         default:
1455                 break;
1456         }
1457 }
1458
1459 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1460                          u16 queue,
1461                          const struct ieee80211_tx_queue_params *params)
1462 {
1463         struct ath_softc *sc = hw->priv;
1464         struct ath9k_tx_queue_info qi;
1465         int ret = 0, qnum;
1466
1467         if (queue >= WME_NUM_AC)
1468                 return 0;
1469
1470         qi.tqi_aifs = params->aifs;
1471         qi.tqi_cwmin = params->cw_min;
1472         qi.tqi_cwmax = params->cw_max;
1473         qi.tqi_burstTime = params->txop;
1474         qnum = ath_get_hal_qnum(queue, sc);
1475
1476         DPRINTF(sc, ATH_DBG_CONFIG,
1477                 "%s: Configure tx [queue/halq] [%d/%d],  "
1478                 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1479                 __func__,
1480                 queue,
1481                 qnum,
1482                 params->aifs,
1483                 params->cw_min,
1484                 params->cw_max,
1485                 params->txop);
1486
1487         ret = ath_txq_update(sc, qnum, &qi);
1488         if (ret)
1489                 DPRINTF(sc, ATH_DBG_FATAL,
1490                         "%s: TXQ Update failed\n", __func__);
1491
1492         return ret;
1493 }
1494
1495 static int ath9k_set_key(struct ieee80211_hw *hw,
1496                          enum set_key_cmd cmd,
1497                          const u8 *local_addr,
1498                          const u8 *addr,
1499                          struct ieee80211_key_conf *key)
1500 {
1501         struct ath_softc *sc = hw->priv;
1502         int ret = 0;
1503
1504         DPRINTF(sc, ATH_DBG_KEYCACHE, " %s: Set HW Key\n", __func__);
1505
1506         switch (cmd) {
1507         case SET_KEY:
1508                 ret = ath_key_config(sc, addr, key);
1509                 if (!ret) {
1510                         set_bit(key->keyidx, sc->sc_keymap);
1511                         key->hw_key_idx = key->keyidx;
1512                         /* push IV and Michael MIC generation to stack */
1513                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1514                         if (key->alg == ALG_TKIP)
1515                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1516                 }
1517                 break;
1518         case DISABLE_KEY:
1519                 ath_key_delete(sc, key);
1520                 clear_bit(key->keyidx, sc->sc_keymap);
1521                 break;
1522         default:
1523                 ret = -EINVAL;
1524         }
1525
1526         return ret;
1527 }
1528
1529 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1530                                    struct ieee80211_vif *vif,
1531                                    struct ieee80211_bss_conf *bss_conf,
1532                                    u32 changed)
1533 {
1534         struct ath_softc *sc = hw->priv;
1535
1536         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1537                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed PREAMBLE %d\n",
1538                         __func__,
1539                         bss_conf->use_short_preamble);
1540                 if (bss_conf->use_short_preamble)
1541                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
1542                 else
1543                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
1544         }
1545
1546         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1547                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed CTS PROT %d\n",
1548                         __func__,
1549                         bss_conf->use_cts_prot);
1550                 if (bss_conf->use_cts_prot &&
1551                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
1552                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
1553                 else
1554                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
1555         }
1556
1557         if (changed & BSS_CHANGED_HT) {
1558                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed HT %d\n",
1559                         __func__,
1560                         bss_conf->assoc_ht);
1561                 ath9k_ht_conf(sc, bss_conf);
1562         }
1563
1564         if (changed & BSS_CHANGED_ASSOC) {
1565                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed ASSOC %d\n",
1566                         __func__,
1567                         bss_conf->assoc);
1568                 ath9k_bss_assoc_info(sc, bss_conf);
1569         }
1570 }
1571
1572 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
1573 {
1574         u64 tsf;
1575         struct ath_softc *sc = hw->priv;
1576         struct ath_hal *ah = sc->sc_ah;
1577
1578         tsf = ath9k_hw_gettsf64(ah);
1579
1580         return tsf;
1581 }
1582
1583 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
1584 {
1585         struct ath_softc *sc = hw->priv;
1586         struct ath_hal *ah = sc->sc_ah;
1587
1588         ath9k_hw_reset_tsf(ah);
1589 }
1590
1591 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1592                        enum ieee80211_ampdu_mlme_action action,
1593                        struct ieee80211_sta *sta,
1594                        u16 tid, u16 *ssn)
1595 {
1596         struct ath_softc *sc = hw->priv;
1597         int ret = 0;
1598
1599         switch (action) {
1600         case IEEE80211_AMPDU_RX_START:
1601                 ret = ath_rx_aggr_start(sc, sta->addr, tid, ssn);
1602                 if (ret < 0)
1603                         DPRINTF(sc, ATH_DBG_FATAL,
1604                                 "%s: Unable to start RX aggregation\n",
1605                                 __func__);
1606                 break;
1607         case IEEE80211_AMPDU_RX_STOP:
1608                 ret = ath_rx_aggr_stop(sc, sta->addr, tid);
1609                 if (ret < 0)
1610                         DPRINTF(sc, ATH_DBG_FATAL,
1611                                 "%s: Unable to stop RX aggregation\n",
1612                                 __func__);
1613                 break;
1614         case IEEE80211_AMPDU_TX_START:
1615                 ret = ath_tx_aggr_start(sc, sta->addr, tid, ssn);
1616                 if (ret < 0)
1617                         DPRINTF(sc, ATH_DBG_FATAL,
1618                                 "%s: Unable to start TX aggregation\n",
1619                                 __func__);
1620                 else
1621                         ieee80211_start_tx_ba_cb_irqsafe(hw, sta->addr, tid);
1622                 break;
1623         case IEEE80211_AMPDU_TX_STOP:
1624                 ret = ath_tx_aggr_stop(sc, sta->addr, tid);
1625                 if (ret < 0)
1626                         DPRINTF(sc, ATH_DBG_FATAL,
1627                                 "%s: Unable to stop TX aggregation\n",
1628                                 __func__);
1629
1630                 ieee80211_stop_tx_ba_cb_irqsafe(hw, sta->addr, tid);
1631                 break;
1632         default:
1633                 DPRINTF(sc, ATH_DBG_FATAL,
1634                         "%s: Unknown AMPDU action\n", __func__);
1635         }
1636
1637         return ret;
1638 }
1639
1640 static int ath9k_no_fragmentation(struct ieee80211_hw *hw, u32 value)
1641 {
1642         return -EOPNOTSUPP;
1643 }
1644
1645 static struct ieee80211_ops ath9k_ops = {
1646         .tx                 = ath9k_tx,
1647         .start              = ath9k_start,
1648         .stop               = ath9k_stop,
1649         .add_interface      = ath9k_add_interface,
1650         .remove_interface   = ath9k_remove_interface,
1651         .config             = ath9k_config,
1652         .config_interface   = ath9k_config_interface,
1653         .configure_filter   = ath9k_configure_filter,
1654         .get_stats          = NULL,
1655         .sta_notify         = ath9k_sta_notify,
1656         .conf_tx            = ath9k_conf_tx,
1657         .get_tx_stats       = NULL,
1658         .bss_info_changed   = ath9k_bss_info_changed,
1659         .set_tim            = NULL,
1660         .set_key            = ath9k_set_key,
1661         .hw_scan            = NULL,
1662         .get_tkip_seq       = NULL,
1663         .set_rts_threshold  = NULL,
1664         .set_frag_threshold = NULL,
1665         .set_retry_limit    = NULL,
1666         .get_tsf            = ath9k_get_tsf,
1667         .reset_tsf          = ath9k_reset_tsf,
1668         .tx_last_beacon     = NULL,
1669         .ampdu_action       = ath9k_ampdu_action,
1670         .set_frag_threshold = ath9k_no_fragmentation,
1671 };
1672
1673 static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1674 {
1675         void __iomem *mem;
1676         struct ath_softc *sc;
1677         struct ieee80211_hw *hw;
1678         const char *athname;
1679         u8 csz;
1680         u32 val;
1681         int ret = 0;
1682
1683         if (pci_enable_device(pdev))
1684                 return -EIO;
1685
1686         /* XXX 32-bit addressing only */
1687         if (pci_set_dma_mask(pdev, 0xffffffff)) {
1688                 printk(KERN_ERR "ath_pci: 32-bit DMA not available\n");
1689                 ret = -ENODEV;
1690                 goto bad;
1691         }
1692
1693         /*
1694          * Cache line size is used to size and align various
1695          * structures used to communicate with the hardware.
1696          */
1697         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
1698         if (csz == 0) {
1699                 /*
1700                  * Linux 2.4.18 (at least) writes the cache line size
1701                  * register as a 16-bit wide register which is wrong.
1702                  * We must have this setup properly for rx buffer
1703                  * DMA to work so force a reasonable value here if it
1704                  * comes up zero.
1705                  */
1706                 csz = L1_CACHE_BYTES / sizeof(u32);
1707                 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
1708         }
1709         /*
1710          * The default setting of latency timer yields poor results,
1711          * set it to the value used by other systems. It may be worth
1712          * tweaking this setting more.
1713          */
1714         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
1715
1716         pci_set_master(pdev);
1717
1718         /*
1719          * Disable the RETRY_TIMEOUT register (0x41) to keep
1720          * PCI Tx retries from interfering with C3 CPU state.
1721          */
1722         pci_read_config_dword(pdev, 0x40, &val);
1723         if ((val & 0x0000ff00) != 0)
1724                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1725
1726         ret = pci_request_region(pdev, 0, "ath9k");
1727         if (ret) {
1728                 dev_err(&pdev->dev, "PCI memory region reserve error\n");
1729                 ret = -ENODEV;
1730                 goto bad;
1731         }
1732
1733         mem = pci_iomap(pdev, 0, 0);
1734         if (!mem) {
1735                 printk(KERN_ERR "PCI memory map error\n") ;
1736                 ret = -EIO;
1737                 goto bad1;
1738         }
1739
1740         hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
1741         if (hw == NULL) {
1742                 printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n");
1743                 goto bad2;
1744         }
1745
1746         hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
1747                 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
1748                 IEEE80211_HW_SIGNAL_DBM |
1749                 IEEE80211_HW_NOISE_DBM;
1750
1751         hw->wiphy->interface_modes =
1752                 BIT(NL80211_IFTYPE_AP) |
1753                 BIT(NL80211_IFTYPE_STATION) |
1754                 BIT(NL80211_IFTYPE_ADHOC);
1755
1756         SET_IEEE80211_DEV(hw, &pdev->dev);
1757         pci_set_drvdata(pdev, hw);
1758
1759         sc = hw->priv;
1760         sc->hw = hw;
1761         sc->pdev = pdev;
1762         sc->mem = mem;
1763
1764         if (ath_attach(id->device, sc) != 0) {
1765                 ret = -ENODEV;
1766                 goto bad3;
1767         }
1768
1769         /* setup interrupt service routine */
1770
1771         if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) {
1772                 printk(KERN_ERR "%s: request_irq failed\n",
1773                         wiphy_name(hw->wiphy));
1774                 ret = -EIO;
1775                 goto bad4;
1776         }
1777
1778         athname = ath9k_hw_probe(id->vendor, id->device);
1779
1780         printk(KERN_INFO "%s: %s: mem=0x%lx, irq=%d\n",
1781                wiphy_name(hw->wiphy),
1782                athname ? athname : "Atheros ???",
1783                (unsigned long)mem, pdev->irq);
1784
1785         return 0;
1786 bad4:
1787         ath_detach(sc);
1788 bad3:
1789         ieee80211_free_hw(hw);
1790 bad2:
1791         pci_iounmap(pdev, mem);
1792 bad1:
1793         pci_release_region(pdev, 0);
1794 bad:
1795         pci_disable_device(pdev);
1796         return ret;
1797 }
1798
1799 static void ath_pci_remove(struct pci_dev *pdev)
1800 {
1801         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1802         struct ath_softc *sc = hw->priv;
1803         enum ath9k_int status;
1804
1805         if (pdev->irq) {
1806                 ath9k_hw_set_interrupts(sc->sc_ah, 0);
1807                 /* clear the ISR */
1808                 ath9k_hw_getisr(sc->sc_ah, &status);
1809                 sc->sc_flags |= SC_OP_INVALID;
1810                 free_irq(pdev->irq, sc);
1811         }
1812         ath_detach(sc);
1813
1814         pci_iounmap(pdev, sc->mem);
1815         pci_release_region(pdev, 0);
1816         pci_disable_device(pdev);
1817         ieee80211_free_hw(hw);
1818 }
1819
1820 #ifdef CONFIG_PM
1821
1822 static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
1823 {
1824         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1825         struct ath_softc *sc = hw->priv;
1826
1827         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
1828
1829 #ifdef CONFIG_RFKILL
1830         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1831                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
1832 #endif
1833
1834         pci_save_state(pdev);
1835         pci_disable_device(pdev);
1836         pci_set_power_state(pdev, 3);
1837
1838         return 0;
1839 }
1840
1841 static int ath_pci_resume(struct pci_dev *pdev)
1842 {
1843         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1844         struct ath_softc *sc = hw->priv;
1845         u32 val;
1846         int err;
1847
1848         err = pci_enable_device(pdev);
1849         if (err)
1850                 return err;
1851         pci_restore_state(pdev);
1852         /*
1853          * Suspend/Resume resets the PCI configuration space, so we have to
1854          * re-disable the RETRY_TIMEOUT register (0x41) to keep
1855          * PCI Tx retries from interfering with C3 CPU state
1856          */
1857         pci_read_config_dword(pdev, 0x40, &val);
1858         if ((val & 0x0000ff00) != 0)
1859                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1860
1861         /* Enable LED */
1862         ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
1863                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1864         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
1865
1866 #ifdef CONFIG_RFKILL
1867         /*
1868          * check the h/w rfkill state on resume
1869          * and start the rfkill poll timer
1870          */
1871         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1872                 queue_delayed_work(sc->hw->workqueue,
1873                                    &sc->rf_kill.rfkill_poll, 0);
1874 #endif
1875
1876         return 0;
1877 }
1878
1879 #endif /* CONFIG_PM */
1880
1881 MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
1882
1883 static struct pci_driver ath_pci_driver = {
1884         .name       = "ath9k",
1885         .id_table   = ath_pci_id_table,
1886         .probe      = ath_pci_probe,
1887         .remove     = ath_pci_remove,
1888 #ifdef CONFIG_PM
1889         .suspend    = ath_pci_suspend,
1890         .resume     = ath_pci_resume,
1891 #endif /* CONFIG_PM */
1892 };
1893
1894 static int __init init_ath_pci(void)
1895 {
1896         printk(KERN_INFO "%s: %s\n", dev_info, ATH_PCI_VERSION);
1897
1898         if (pci_register_driver(&ath_pci_driver) < 0) {
1899                 printk(KERN_ERR
1900                         "ath_pci: No devices found, driver not installed.\n");
1901                 pci_unregister_driver(&ath_pci_driver);
1902                 return -ENODEV;
1903         }
1904
1905         return 0;
1906 }
1907 module_init(init_ath_pci);
1908
1909 static void __exit exit_ath_pci(void)
1910 {
1911         pci_unregister_driver(&ath_pci_driver);
1912         printk(KERN_INFO "%s: driver unloaded\n", dev_info);
1913 }
1914 module_exit(exit_ath_pci);