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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         DECLARE_MAC_BUF(mac);
366
367         if (bss_conf->assoc) {
368                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Bss Info ASSOC %d\n",
369                         __func__,
370                         bss_conf->aid);
371
372                 avp = sc->sc_vaps[0];
373                 if (avp == NULL) {
374                         DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
375                                 __func__);
376                         return;
377                 }
378
379                 /* New association, store aid */
380                 if (avp->av_opmode == ATH9K_M_STA) {
381                         sc->sc_curaid = bss_conf->aid;
382                         ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
383                                                sc->sc_curaid);
384                 }
385
386                 /* Configure the beacon */
387                 ath_beacon_config(sc, 0);
388                 sc->sc_flags |= SC_OP_BEACONS;
389
390                 /* Reset rssi stats */
391                 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER;
392                 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER;
393                 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER;
394                 sc->sc_halstats.ns_avgtxrate = ATH_RATE_DUMMY_MARKER;
395
396                 /* Update chainmask */
397                 ath_update_chainmask(sc, bss_conf->assoc_ht);
398
399                 DPRINTF(sc, ATH_DBG_CONFIG,
400                         "%s: bssid %s aid 0x%x\n",
401                         __func__,
402                         print_mac(mac, sc->sc_curbssid), sc->sc_curaid);
403
404                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
405                         __func__,
406                         curchan->center_freq);
407
408                 pos = ath_get_channel(sc, curchan);
409                 if (pos == -1) {
410                         DPRINTF(sc, ATH_DBG_FATAL,
411                                 "%s: Invalid channel\n", __func__);
412                         return;
413                 }
414
415                 if (hw->conf.ht_conf.ht_supported)
416                         sc->sc_ah->ah_channels[pos].chanmode =
417                                 ath_get_extchanmode(sc, curchan);
418                 else
419                         sc->sc_ah->ah_channels[pos].chanmode =
420                                 (curchan->band == IEEE80211_BAND_2GHZ) ?
421                                 CHANNEL_G : CHANNEL_A;
422
423                 /* set h/w channel */
424                 if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
425                         DPRINTF(sc, ATH_DBG_FATAL,
426                                 "%s: Unable to set channel\n",
427                                 __func__);
428
429                 ath_rate_newstate(sc, avp);
430                 /* Update ratectrl about the new state */
431                 ath_rc_node_update(hw, avp->rc_node);
432
433                 /* Start ANI */
434                 mod_timer(&sc->sc_ani.timer,
435                         jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
436
437         } else {
438                 DPRINTF(sc, ATH_DBG_CONFIG,
439                 "%s: Bss Info DISSOC\n", __func__);
440                 sc->sc_curaid = 0;
441         }
442 }
443
444 void ath_get_beaconconfig(struct ath_softc *sc,
445                           int if_id,
446                           struct ath_beacon_config *conf)
447 {
448         struct ieee80211_hw *hw = sc->hw;
449
450         /* fill in beacon config data */
451
452         conf->beacon_interval = hw->conf.beacon_int;
453         conf->listen_interval = 100;
454         conf->dtim_count = 1;
455         conf->bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf->listen_interval;
456 }
457
458 void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
459                      struct ath_xmit_status *tx_status, struct ath_node *an)
460 {
461         struct ieee80211_hw *hw = sc->hw;
462         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
463
464         DPRINTF(sc, ATH_DBG_XMIT,
465                 "%s: TX complete: skb: %p\n", __func__, skb);
466
467         if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK ||
468                 tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
469                 /* free driver's private data area of tx_info */
470                 if (tx_info->driver_data[0] != NULL)
471                         kfree(tx_info->driver_data[0]);
472                         tx_info->driver_data[0] = NULL;
473         }
474
475         if (tx_status->flags & ATH_TX_BAR) {
476                 tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
477                 tx_status->flags &= ~ATH_TX_BAR;
478         }
479
480         if (tx_status->flags & (ATH_TX_ERROR | ATH_TX_XRETRY)) {
481                 if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
482                         /* Frame was not ACKed, but an ACK was expected */
483                         tx_info->status.excessive_retries = 1;
484                 }
485         } else {
486                 /* Frame was ACKed */
487                 tx_info->flags |= IEEE80211_TX_STAT_ACK;
488         }
489
490         tx_info->status.retry_count = tx_status->retries;
491
492         ieee80211_tx_status(hw, skb);
493         if (an)
494                 ath_node_put(sc, an, ATH9K_BH_STATUS_CHANGE);
495 }
496
497 int _ath_rx_indicate(struct ath_softc *sc,
498                      struct sk_buff *skb,
499                      struct ath_recv_status *status,
500                      u16 keyix)
501 {
502         struct ieee80211_hw *hw = sc->hw;
503         struct ath_node *an = NULL;
504         struct ieee80211_rx_status rx_status;
505         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
506         int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
507         int padsize;
508         enum ATH_RX_TYPE st;
509
510         /* see if any padding is done by the hw and remove it */
511         if (hdrlen & 3) {
512                 padsize = hdrlen % 4;
513                 memmove(skb->data + padsize, skb->data, hdrlen);
514                 skb_pull(skb, padsize);
515         }
516
517         /* Prepare rx status */
518         ath9k_rx_prepare(sc, skb, status, &rx_status);
519
520         if (!(keyix == ATH9K_RXKEYIX_INVALID) &&
521             !(status->flags & ATH_RX_DECRYPT_ERROR)) {
522                 rx_status.flag |= RX_FLAG_DECRYPTED;
523         } else if ((le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_PROTECTED)
524                    && !(status->flags & ATH_RX_DECRYPT_ERROR)
525                    && skb->len >= hdrlen + 4) {
526                 keyix = skb->data[hdrlen + 3] >> 6;
527
528                 if (test_bit(keyix, sc->sc_keymap))
529                         rx_status.flag |= RX_FLAG_DECRYPTED;
530         }
531
532         spin_lock_bh(&sc->node_lock);
533         an = ath_node_find(sc, hdr->addr2);
534         spin_unlock_bh(&sc->node_lock);
535
536         if (an) {
537                 ath_rx_input(sc, an,
538                              hw->conf.ht_conf.ht_supported,
539                              skb, status, &st);
540         }
541         if (!an || (st != ATH_RX_CONSUMED))
542                 __ieee80211_rx(hw, skb, &rx_status);
543
544         return 0;
545 }
546
547 int ath_rx_subframe(struct ath_node *an,
548                     struct sk_buff *skb,
549                     struct ath_recv_status *status)
550 {
551         struct ath_softc *sc = an->an_sc;
552         struct ieee80211_hw *hw = sc->hw;
553         struct ieee80211_rx_status rx_status;
554
555         /* Prepare rx status */
556         ath9k_rx_prepare(sc, skb, status, &rx_status);
557         if (!(status->flags & ATH_RX_DECRYPT_ERROR))
558                 rx_status.flag |= RX_FLAG_DECRYPTED;
559
560         __ieee80211_rx(hw, skb, &rx_status);
561
562         return 0;
563 }
564
565 /********************************/
566 /*       LED functions          */
567 /********************************/
568
569 static void ath_led_brightness(struct led_classdev *led_cdev,
570                                enum led_brightness brightness)
571 {
572         struct ath_led *led = container_of(led_cdev, struct ath_led, led_cdev);
573         struct ath_softc *sc = led->sc;
574
575         switch (brightness) {
576         case LED_OFF:
577                 if (led->led_type == ATH_LED_ASSOC ||
578                     led->led_type == ATH_LED_RADIO)
579                         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
580                 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN,
581                                 (led->led_type == ATH_LED_RADIO) ? 1 :
582                                 !!(sc->sc_flags & SC_OP_LED_ASSOCIATED));
583                 break;
584         case LED_FULL:
585                 if (led->led_type == ATH_LED_ASSOC)
586                         sc->sc_flags |= SC_OP_LED_ASSOCIATED;
587                 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 0);
588                 break;
589         default:
590                 break;
591         }
592 }
593
594 static int ath_register_led(struct ath_softc *sc, struct ath_led *led,
595                             char *trigger)
596 {
597         int ret;
598
599         led->sc = sc;
600         led->led_cdev.name = led->name;
601         led->led_cdev.default_trigger = trigger;
602         led->led_cdev.brightness_set = ath_led_brightness;
603
604         ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->led_cdev);
605         if (ret)
606                 DPRINTF(sc, ATH_DBG_FATAL,
607                         "Failed to register led:%s", led->name);
608         else
609                 led->registered = 1;
610         return ret;
611 }
612
613 static void ath_unregister_led(struct ath_led *led)
614 {
615         if (led->registered) {
616                 led_classdev_unregister(&led->led_cdev);
617                 led->registered = 0;
618         }
619 }
620
621 static void ath_deinit_leds(struct ath_softc *sc)
622 {
623         ath_unregister_led(&sc->assoc_led);
624         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
625         ath_unregister_led(&sc->tx_led);
626         ath_unregister_led(&sc->rx_led);
627         ath_unregister_led(&sc->radio_led);
628         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
629 }
630
631 static void ath_init_leds(struct ath_softc *sc)
632 {
633         char *trigger;
634         int ret;
635
636         /* Configure gpio 1 for output */
637         ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
638                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
639         /* LED off, active low */
640         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
641
642         trigger = ieee80211_get_radio_led_name(sc->hw);
643         snprintf(sc->radio_led.name, sizeof(sc->radio_led.name),
644                 "ath9k-%s:radio", wiphy_name(sc->hw->wiphy));
645         ret = ath_register_led(sc, &sc->radio_led, trigger);
646         sc->radio_led.led_type = ATH_LED_RADIO;
647         if (ret)
648                 goto fail;
649
650         trigger = ieee80211_get_assoc_led_name(sc->hw);
651         snprintf(sc->assoc_led.name, sizeof(sc->assoc_led.name),
652                 "ath9k-%s:assoc", wiphy_name(sc->hw->wiphy));
653         ret = ath_register_led(sc, &sc->assoc_led, trigger);
654         sc->assoc_led.led_type = ATH_LED_ASSOC;
655         if (ret)
656                 goto fail;
657
658         trigger = ieee80211_get_tx_led_name(sc->hw);
659         snprintf(sc->tx_led.name, sizeof(sc->tx_led.name),
660                 "ath9k-%s:tx", wiphy_name(sc->hw->wiphy));
661         ret = ath_register_led(sc, &sc->tx_led, trigger);
662         sc->tx_led.led_type = ATH_LED_TX;
663         if (ret)
664                 goto fail;
665
666         trigger = ieee80211_get_rx_led_name(sc->hw);
667         snprintf(sc->rx_led.name, sizeof(sc->rx_led.name),
668                 "ath9k-%s:rx", wiphy_name(sc->hw->wiphy));
669         ret = ath_register_led(sc, &sc->rx_led, trigger);
670         sc->rx_led.led_type = ATH_LED_RX;
671         if (ret)
672                 goto fail;
673
674         return;
675
676 fail:
677         ath_deinit_leds(sc);
678 }
679
680 #ifdef CONFIG_RFKILL
681 /*******************/
682 /*      Rfkill     */
683 /*******************/
684
685 static void ath_radio_enable(struct ath_softc *sc)
686 {
687         struct ath_hal *ah = sc->sc_ah;
688         int status;
689
690         spin_lock_bh(&sc->sc_resetlock);
691         if (!ath9k_hw_reset(ah, ah->ah_curchan,
692                             sc->sc_ht_info.tx_chan_width,
693                             sc->sc_tx_chainmask,
694                             sc->sc_rx_chainmask,
695                             sc->sc_ht_extprotspacing,
696                             false, &status)) {
697                 DPRINTF(sc, ATH_DBG_FATAL,
698                         "%s: unable to reset channel %u (%uMhz) "
699                         "flags 0x%x hal status %u\n", __func__,
700                         ath9k_hw_mhz2ieee(ah,
701                                           ah->ah_curchan->channel,
702                                           ah->ah_curchan->channelFlags),
703                         ah->ah_curchan->channel,
704                         ah->ah_curchan->channelFlags, status);
705         }
706         spin_unlock_bh(&sc->sc_resetlock);
707
708         ath_update_txpow(sc);
709         if (ath_startrecv(sc) != 0) {
710                 DPRINTF(sc, ATH_DBG_FATAL,
711                         "%s: unable to restart recv logic\n", __func__);
712                 return;
713         }
714
715         if (sc->sc_flags & SC_OP_BEACONS)
716                 ath_beacon_config(sc, ATH_IF_ID_ANY);   /* restart beacons */
717
718         /* Re-Enable  interrupts */
719         ath9k_hw_set_interrupts(ah, sc->sc_imask);
720
721         /* Enable LED */
722         ath9k_hw_cfg_output(ah, ATH_LED_PIN,
723                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
724         ath9k_hw_set_gpio(ah, ATH_LED_PIN, 0);
725
726         ieee80211_wake_queues(sc->hw);
727 }
728
729 static void ath_radio_disable(struct ath_softc *sc)
730 {
731         struct ath_hal *ah = sc->sc_ah;
732         int status;
733
734
735         ieee80211_stop_queues(sc->hw);
736
737         /* Disable LED */
738         ath9k_hw_set_gpio(ah, ATH_LED_PIN, 1);
739         ath9k_hw_cfg_gpio_input(ah, ATH_LED_PIN);
740
741         /* Disable interrupts */
742         ath9k_hw_set_interrupts(ah, 0);
743
744         ath_draintxq(sc, false);        /* clear pending tx frames */
745         ath_stoprecv(sc);               /* turn off frame recv */
746         ath_flushrecv(sc);              /* flush recv queue */
747
748         spin_lock_bh(&sc->sc_resetlock);
749         if (!ath9k_hw_reset(ah, ah->ah_curchan,
750                             sc->sc_ht_info.tx_chan_width,
751                             sc->sc_tx_chainmask,
752                             sc->sc_rx_chainmask,
753                             sc->sc_ht_extprotspacing,
754                             false, &status)) {
755                 DPRINTF(sc, ATH_DBG_FATAL,
756                         "%s: unable to reset channel %u (%uMhz) "
757                         "flags 0x%x hal status %u\n", __func__,
758                         ath9k_hw_mhz2ieee(ah,
759                                 ah->ah_curchan->channel,
760                                 ah->ah_curchan->channelFlags),
761                         ah->ah_curchan->channel,
762                         ah->ah_curchan->channelFlags, status);
763         }
764         spin_unlock_bh(&sc->sc_resetlock);
765
766         ath9k_hw_phy_disable(ah);
767         ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP);
768 }
769
770 static bool ath_is_rfkill_set(struct ath_softc *sc)
771 {
772         struct ath_hal *ah = sc->sc_ah;
773
774         return ath9k_hw_gpio_get(ah, ah->ah_rfkill_gpio) ==
775                                   ah->ah_rfkill_polarity;
776 }
777
778 /* h/w rfkill poll function */
779 static void ath_rfkill_poll(struct work_struct *work)
780 {
781         struct ath_softc *sc = container_of(work, struct ath_softc,
782                                             rf_kill.rfkill_poll.work);
783         bool radio_on;
784
785         if (sc->sc_flags & SC_OP_INVALID)
786                 return;
787
788         radio_on = !ath_is_rfkill_set(sc);
789
790         /*
791          * enable/disable radio only when there is a
792          * state change in RF switch
793          */
794         if (radio_on == !!(sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED)) {
795                 enum rfkill_state state;
796
797                 if (sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED) {
798                         state = radio_on ? RFKILL_STATE_SOFT_BLOCKED
799                                 : RFKILL_STATE_HARD_BLOCKED;
800                 } else if (radio_on) {
801                         ath_radio_enable(sc);
802                         state = RFKILL_STATE_UNBLOCKED;
803                 } else {
804                         ath_radio_disable(sc);
805                         state = RFKILL_STATE_HARD_BLOCKED;
806                 }
807
808                 if (state == RFKILL_STATE_HARD_BLOCKED)
809                         sc->sc_flags |= SC_OP_RFKILL_HW_BLOCKED;
810                 else
811                         sc->sc_flags &= ~SC_OP_RFKILL_HW_BLOCKED;
812
813                 rfkill_force_state(sc->rf_kill.rfkill, state);
814         }
815
816         queue_delayed_work(sc->hw->workqueue, &sc->rf_kill.rfkill_poll,
817                            msecs_to_jiffies(ATH_RFKILL_POLL_INTERVAL));
818 }
819
820 /* s/w rfkill handler */
821 static int ath_sw_toggle_radio(void *data, enum rfkill_state state)
822 {
823         struct ath_softc *sc = data;
824
825         switch (state) {
826         case RFKILL_STATE_SOFT_BLOCKED:
827                 if (!(sc->sc_flags & (SC_OP_RFKILL_HW_BLOCKED |
828                     SC_OP_RFKILL_SW_BLOCKED)))
829                         ath_radio_disable(sc);
830                 sc->sc_flags |= SC_OP_RFKILL_SW_BLOCKED;
831                 return 0;
832         case RFKILL_STATE_UNBLOCKED:
833                 if ((sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED)) {
834                         sc->sc_flags &= ~SC_OP_RFKILL_SW_BLOCKED;
835                         if (sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED) {
836                                 DPRINTF(sc, ATH_DBG_FATAL, "Can't turn on the"
837                                         "radio as it is disabled by h/w \n");
838                                 return -EPERM;
839                         }
840                         ath_radio_enable(sc);
841                 }
842                 return 0;
843         default:
844                 return -EINVAL;
845         }
846 }
847
848 /* Init s/w rfkill */
849 static int ath_init_sw_rfkill(struct ath_softc *sc)
850 {
851         sc->rf_kill.rfkill = rfkill_allocate(wiphy_dev(sc->hw->wiphy),
852                                              RFKILL_TYPE_WLAN);
853         if (!sc->rf_kill.rfkill) {
854                 DPRINTF(sc, ATH_DBG_FATAL, "Failed to allocate rfkill\n");
855                 return -ENOMEM;
856         }
857
858         snprintf(sc->rf_kill.rfkill_name, sizeof(sc->rf_kill.rfkill_name),
859                 "ath9k-%s:rfkill", wiphy_name(sc->hw->wiphy));
860         sc->rf_kill.rfkill->name = sc->rf_kill.rfkill_name;
861         sc->rf_kill.rfkill->data = sc;
862         sc->rf_kill.rfkill->toggle_radio = ath_sw_toggle_radio;
863         sc->rf_kill.rfkill->state = RFKILL_STATE_UNBLOCKED;
864         sc->rf_kill.rfkill->user_claim_unsupported = 1;
865
866         return 0;
867 }
868
869 /* Deinitialize rfkill */
870 static void ath_deinit_rfkill(struct ath_softc *sc)
871 {
872         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
873                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
874
875         if (sc->sc_flags & SC_OP_RFKILL_REGISTERED) {
876                 rfkill_unregister(sc->rf_kill.rfkill);
877                 sc->sc_flags &= ~SC_OP_RFKILL_REGISTERED;
878                 sc->rf_kill.rfkill = NULL;
879         }
880 }
881 #endif /* CONFIG_RFKILL */
882
883 static int ath_detach(struct ath_softc *sc)
884 {
885         struct ieee80211_hw *hw = sc->hw;
886
887         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach ATH hw\n", __func__);
888
889         /* Deinit LED control */
890         ath_deinit_leds(sc);
891
892 #ifdef CONFIG_RFKILL
893         /* deinit rfkill */
894         ath_deinit_rfkill(sc);
895 #endif
896
897         /* Unregister hw */
898
899         ieee80211_unregister_hw(hw);
900
901         /* unregister Rate control */
902         ath_rate_control_unregister();
903
904         /* tx/rx cleanup */
905
906         ath_rx_cleanup(sc);
907         ath_tx_cleanup(sc);
908
909         /* Deinit */
910
911         ath_deinit(sc);
912
913         return 0;
914 }
915
916 static int ath_attach(u16 devid,
917                       struct ath_softc *sc)
918 {
919         struct ieee80211_hw *hw = sc->hw;
920         int error = 0;
921
922         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach ATH hw\n", __func__);
923
924         error = ath_init(devid, sc);
925         if (error != 0)
926                 return error;
927
928         /* Init nodes */
929
930         INIT_LIST_HEAD(&sc->node_list);
931         spin_lock_init(&sc->node_lock);
932
933         /* get mac address from hardware and set in mac80211 */
934
935         SET_IEEE80211_PERM_ADDR(hw, sc->sc_myaddr);
936
937         /* setup channels and rates */
938
939         sc->sbands[IEEE80211_BAND_2GHZ].channels =
940                 sc->channels[IEEE80211_BAND_2GHZ];
941         sc->sbands[IEEE80211_BAND_2GHZ].bitrates =
942                 sc->rates[IEEE80211_BAND_2GHZ];
943         sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
944
945         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
946                 /* Setup HT capabilities for 2.4Ghz*/
947                 setup_ht_cap(&sc->sbands[IEEE80211_BAND_2GHZ].ht_info);
948
949         hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
950                 &sc->sbands[IEEE80211_BAND_2GHZ];
951
952         if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes)) {
953                 sc->sbands[IEEE80211_BAND_5GHZ].channels =
954                         sc->channels[IEEE80211_BAND_5GHZ];
955                 sc->sbands[IEEE80211_BAND_5GHZ].bitrates =
956                         sc->rates[IEEE80211_BAND_5GHZ];
957                 sc->sbands[IEEE80211_BAND_5GHZ].band =
958                         IEEE80211_BAND_5GHZ;
959
960                 if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
961                         /* Setup HT capabilities for 5Ghz*/
962                         setup_ht_cap(&sc->sbands[IEEE80211_BAND_5GHZ].ht_info);
963
964                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
965                         &sc->sbands[IEEE80211_BAND_5GHZ];
966         }
967
968         /* FIXME: Have to figure out proper hw init values later */
969
970         hw->queues = 4;
971         hw->ampdu_queues = 1;
972
973         /* Register rate control */
974         hw->rate_control_algorithm = "ath9k_rate_control";
975         error = ath_rate_control_register();
976         if (error != 0) {
977                 DPRINTF(sc, ATH_DBG_FATAL,
978                         "%s: Unable to register rate control "
979                         "algorithm:%d\n", __func__, error);
980                 ath_rate_control_unregister();
981                 goto bad;
982         }
983
984         error = ieee80211_register_hw(hw);
985         if (error != 0) {
986                 ath_rate_control_unregister();
987                 goto bad;
988         }
989
990         /* Initialize LED control */
991         ath_init_leds(sc);
992
993 #ifdef CONFIG_RFKILL
994         /* Initialze h/w Rfkill */
995         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
996                 INIT_DELAYED_WORK(&sc->rf_kill.rfkill_poll, ath_rfkill_poll);
997
998         /* Initialize s/w rfkill */
999         if (ath_init_sw_rfkill(sc))
1000                 goto detach;
1001 #endif
1002
1003         /* initialize tx/rx engine */
1004
1005         error = ath_tx_init(sc, ATH_TXBUF);
1006         if (error != 0)
1007                 goto detach;
1008
1009         error = ath_rx_init(sc, ATH_RXBUF);
1010         if (error != 0)
1011                 goto detach;
1012
1013         return 0;
1014 detach:
1015         ath_detach(sc);
1016 bad:
1017         return error;
1018 }
1019
1020 static int ath9k_start(struct ieee80211_hw *hw)
1021 {
1022         struct ath_softc *sc = hw->priv;
1023         struct ieee80211_channel *curchan = hw->conf.channel;
1024         int error = 0, pos;
1025
1026         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Starting driver with "
1027                 "initial channel: %d MHz\n", __func__, curchan->center_freq);
1028
1029         /* setup initial channel */
1030
1031         pos = ath_get_channel(sc, curchan);
1032         if (pos == -1) {
1033                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
1034                 return -EINVAL;
1035         }
1036
1037         sc->sc_ah->ah_channels[pos].chanmode =
1038                 (curchan->band == IEEE80211_BAND_2GHZ) ? CHANNEL_G : CHANNEL_A;
1039
1040         /* open ath_dev */
1041         error = ath_open(sc, &sc->sc_ah->ah_channels[pos]);
1042         if (error) {
1043                 DPRINTF(sc, ATH_DBG_FATAL,
1044                         "%s: Unable to complete ath_open\n", __func__);
1045                 return error;
1046         }
1047
1048 #ifdef CONFIG_RFKILL
1049         /* Start rfkill polling */
1050         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1051                 queue_delayed_work(sc->hw->workqueue,
1052                                    &sc->rf_kill.rfkill_poll, 0);
1053
1054         if (!(sc->sc_flags & SC_OP_RFKILL_REGISTERED)) {
1055                 if (rfkill_register(sc->rf_kill.rfkill)) {
1056                         DPRINTF(sc, ATH_DBG_FATAL,
1057                                         "Unable to register rfkill\n");
1058                         rfkill_free(sc->rf_kill.rfkill);
1059
1060                         /* Deinitialize the device */
1061                         if (sc->pdev->irq)
1062                                 free_irq(sc->pdev->irq, sc);
1063                         ath_detach(sc);
1064                         pci_iounmap(sc->pdev, sc->mem);
1065                         pci_release_region(sc->pdev, 0);
1066                         pci_disable_device(sc->pdev);
1067                         ieee80211_free_hw(hw);
1068                         return -EIO;
1069                 } else {
1070                         sc->sc_flags |= SC_OP_RFKILL_REGISTERED;
1071                 }
1072         }
1073 #endif
1074
1075         ieee80211_wake_queues(hw);
1076         return 0;
1077 }
1078
1079 static int ath9k_tx(struct ieee80211_hw *hw,
1080                     struct sk_buff *skb)
1081 {
1082         struct ath_softc *sc = hw->priv;
1083         int hdrlen, padsize;
1084         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1085
1086         /*
1087          * As a temporary workaround, assign seq# here; this will likely need
1088          * to be cleaned up to work better with Beacon transmission and virtual
1089          * BSSes.
1090          */
1091         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1092                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1093                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
1094                         sc->seq_no += 0x10;
1095                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1096                 hdr->seq_ctrl |= cpu_to_le16(sc->seq_no);
1097         }
1098
1099         /* Add the padding after the header if this is not already done */
1100         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1101         if (hdrlen & 3) {
1102                 padsize = hdrlen % 4;
1103                 if (skb_headroom(skb) < padsize)
1104                         return -1;
1105                 skb_push(skb, padsize);
1106                 memmove(skb->data, skb->data + padsize, hdrlen);
1107         }
1108
1109         DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting packet, skb: %p\n",
1110                 __func__,
1111                 skb);
1112
1113         if (ath_tx_start(sc, skb) != 0) {
1114                 DPRINTF(sc, ATH_DBG_XMIT, "%s: TX failed\n", __func__);
1115                 dev_kfree_skb_any(skb);
1116                 /* FIXME: Check for proper return value from ATH_DEV */
1117                 return 0;
1118         }
1119
1120         return 0;
1121 }
1122
1123 static void ath9k_stop(struct ieee80211_hw *hw)
1124 {
1125         struct ath_softc *sc = hw->priv;
1126         int error;
1127
1128         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Driver halt\n", __func__);
1129
1130         error = ath_suspend(sc);
1131         if (error)
1132                 DPRINTF(sc, ATH_DBG_CONFIG,
1133                         "%s: Device is no longer present\n", __func__);
1134
1135         ieee80211_stop_queues(hw);
1136
1137 #ifdef CONFIG_RFKILL
1138         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1139                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
1140 #endif
1141 }
1142
1143 static int ath9k_add_interface(struct ieee80211_hw *hw,
1144                                struct ieee80211_if_init_conf *conf)
1145 {
1146         struct ath_softc *sc = hw->priv;
1147         int error, ic_opmode = 0;
1148
1149         /* Support only vap for now */
1150
1151         if (sc->sc_nvaps)
1152                 return -ENOBUFS;
1153
1154         switch (conf->type) {
1155         case NL80211_IFTYPE_STATION:
1156                 ic_opmode = ATH9K_M_STA;
1157                 break;
1158         case NL80211_IFTYPE_ADHOC:
1159                 ic_opmode = ATH9K_M_IBSS;
1160                 break;
1161         case NL80211_IFTYPE_AP:
1162                 ic_opmode = ATH9K_M_HOSTAP;
1163                 break;
1164         default:
1165                 DPRINTF(sc, ATH_DBG_FATAL,
1166                         "%s: Interface type %d not yet supported\n",
1167                         __func__, conf->type);
1168                 return -EOPNOTSUPP;
1169         }
1170
1171         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a VAP of type: %d\n",
1172                 __func__,
1173                 ic_opmode);
1174
1175         error = ath_vap_attach(sc, 0, conf->vif, ic_opmode);
1176         if (error) {
1177                 DPRINTF(sc, ATH_DBG_FATAL,
1178                         "%s: Unable to attach vap, error: %d\n",
1179                         __func__, error);
1180                 return error;
1181         }
1182
1183         if (conf->type == NL80211_IFTYPE_AP) {
1184                 /* TODO: is this a suitable place to start ANI for AP mode? */
1185                 /* Start ANI */
1186                 mod_timer(&sc->sc_ani.timer,
1187                           jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
1188         }
1189
1190         return 0;
1191 }
1192
1193 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1194                                    struct ieee80211_if_init_conf *conf)
1195 {
1196         struct ath_softc *sc = hw->priv;
1197         struct ath_vap *avp;
1198         int error;
1199
1200         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach VAP\n", __func__);
1201
1202         avp = sc->sc_vaps[0];
1203         if (avp == NULL) {
1204                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
1205                         __func__);
1206                 return;
1207         }
1208
1209 #ifdef CONFIG_SLOW_ANT_DIV
1210         ath_slow_ant_div_stop(&sc->sc_antdiv);
1211 #endif
1212         /* Stop ANI */
1213         del_timer_sync(&sc->sc_ani.timer);
1214
1215         /* Update ratectrl */
1216         ath_rate_newstate(sc, avp);
1217
1218         /* Reclaim beacon resources */
1219         if (sc->sc_ah->ah_opmode == ATH9K_M_HOSTAP ||
1220             sc->sc_ah->ah_opmode == ATH9K_M_IBSS) {
1221                 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
1222                 ath_beacon_return(sc, avp);
1223         }
1224
1225         /* Set interrupt mask */
1226         sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1227         ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_imask & ~ATH9K_INT_GLOBAL);
1228         sc->sc_flags &= ~SC_OP_BEACONS;
1229
1230         error = ath_vap_detach(sc, 0);
1231         if (error)
1232                 DPRINTF(sc, ATH_DBG_FATAL,
1233                         "%s: Unable to detach vap, error: %d\n",
1234                         __func__, error);
1235 }
1236
1237 static int ath9k_config(struct ieee80211_hw *hw,
1238                         struct ieee80211_conf *conf)
1239 {
1240         struct ath_softc *sc = hw->priv;
1241         struct ieee80211_channel *curchan = hw->conf.channel;
1242         int pos;
1243
1244         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
1245                 __func__,
1246                 curchan->center_freq);
1247
1248         pos = ath_get_channel(sc, curchan);
1249         if (pos == -1) {
1250                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
1251                 return -EINVAL;
1252         }
1253
1254         sc->sc_ah->ah_channels[pos].chanmode =
1255                 (curchan->band == IEEE80211_BAND_2GHZ) ?
1256                 CHANNEL_G : CHANNEL_A;
1257
1258         if (sc->sc_curaid && hw->conf.ht_conf.ht_supported)
1259                 sc->sc_ah->ah_channels[pos].chanmode =
1260                         ath_get_extchanmode(sc, curchan);
1261
1262         sc->sc_config.txpowlimit = 2 * conf->power_level;
1263
1264         /* set h/w channel */
1265         if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
1266                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Unable to set channel\n",
1267                         __func__);
1268
1269         return 0;
1270 }
1271
1272 static int ath9k_config_interface(struct ieee80211_hw *hw,
1273                                   struct ieee80211_vif *vif,
1274                                   struct ieee80211_if_conf *conf)
1275 {
1276         struct ath_softc *sc = hw->priv;
1277         struct ath_hal *ah = sc->sc_ah;
1278         struct ath_vap *avp;
1279         u32 rfilt = 0;
1280         int error, i;
1281         DECLARE_MAC_BUF(mac);
1282
1283         avp = sc->sc_vaps[0];
1284         if (avp == NULL) {
1285                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
1286                         __func__);
1287                 return -EINVAL;
1288         }
1289
1290         /* TODO: Need to decide which hw opmode to use for multi-interface
1291          * cases */
1292         if (vif->type == NL80211_IFTYPE_AP &&
1293             ah->ah_opmode != ATH9K_M_HOSTAP) {
1294                 ah->ah_opmode = ATH9K_M_HOSTAP;
1295                 ath9k_hw_setopmode(ah);
1296                 ath9k_hw_write_associd(ah, sc->sc_myaddr, 0);
1297                 /* Request full reset to get hw opmode changed properly */
1298                 sc->sc_flags |= SC_OP_FULL_RESET;
1299         }
1300
1301         if ((conf->changed & IEEE80211_IFCC_BSSID) &&
1302             !is_zero_ether_addr(conf->bssid)) {
1303                 switch (vif->type) {
1304                 case NL80211_IFTYPE_STATION:
1305                 case NL80211_IFTYPE_ADHOC:
1306                         /* Update ratectrl about the new state */
1307                         ath_rate_newstate(sc, avp);
1308
1309                         /* Set BSSID */
1310                         memcpy(sc->sc_curbssid, conf->bssid, ETH_ALEN);
1311                         sc->sc_curaid = 0;
1312                         ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
1313                                                sc->sc_curaid);
1314
1315                         /* Set aggregation protection mode parameters */
1316                         sc->sc_config.ath_aggr_prot = 0;
1317
1318                         /*
1319                          * Reset our TSF so that its value is lower than the
1320                          * beacon that we are trying to catch.
1321                          * Only then hw will update its TSF register with the
1322                          * new beacon. Reset the TSF before setting the BSSID
1323                          * to avoid allowing in any frames that would update
1324                          * our TSF only to have us clear it
1325                          * immediately thereafter.
1326                          */
1327                         ath9k_hw_reset_tsf(sc->sc_ah);
1328
1329                         /* Disable BMISS interrupt when we're not associated */
1330                         ath9k_hw_set_interrupts(sc->sc_ah,
1331                                         sc->sc_imask &
1332                                         ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS));
1333                         sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1334
1335                         DPRINTF(sc, ATH_DBG_CONFIG,
1336                                 "%s: RX filter 0x%x bssid %s aid 0x%x\n",
1337                                 __func__, rfilt,
1338                                 print_mac(mac, sc->sc_curbssid), sc->sc_curaid);
1339
1340                         /* need to reconfigure the beacon */
1341                         sc->sc_flags &= ~SC_OP_BEACONS ;
1342
1343                         break;
1344                 default:
1345                         break;
1346                 }
1347         }
1348
1349         if ((conf->changed & IEEE80211_IFCC_BEACON) &&
1350             ((vif->type == NL80211_IFTYPE_ADHOC) ||
1351              (vif->type == NL80211_IFTYPE_AP))) {
1352                 /*
1353                  * Allocate and setup the beacon frame.
1354                  *
1355                  * Stop any previous beacon DMA.  This may be
1356                  * necessary, for example, when an ibss merge
1357                  * causes reconfiguration; we may be called
1358                  * with beacon transmission active.
1359                  */
1360                 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
1361
1362                 error = ath_beacon_alloc(sc, 0);
1363                 if (error != 0)
1364                         return error;
1365
1366                 ath_beacon_sync(sc, 0);
1367         }
1368
1369         /* Check for WLAN_CAPABILITY_PRIVACY ? */
1370         if ((avp->av_opmode != NL80211_IFTYPE_STATION)) {
1371                 for (i = 0; i < IEEE80211_WEP_NKID; i++)
1372                         if (ath9k_hw_keyisvalid(sc->sc_ah, (u16)i))
1373                                 ath9k_hw_keysetmac(sc->sc_ah,
1374                                                    (u16)i,
1375                                                    sc->sc_curbssid);
1376         }
1377
1378         /* Only legacy IBSS for now */
1379         if (vif->type == NL80211_IFTYPE_ADHOC)
1380                 ath_update_chainmask(sc, 0);
1381
1382         return 0;
1383 }
1384
1385 #define SUPPORTED_FILTERS                       \
1386         (FIF_PROMISC_IN_BSS |                   \
1387         FIF_ALLMULTI |                          \
1388         FIF_CONTROL |                           \
1389         FIF_OTHER_BSS |                         \
1390         FIF_BCN_PRBRESP_PROMISC |               \
1391         FIF_FCSFAIL)
1392
1393 /* FIXME: sc->sc_full_reset ? */
1394 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1395                                    unsigned int changed_flags,
1396                                    unsigned int *total_flags,
1397                                    int mc_count,
1398                                    struct dev_mc_list *mclist)
1399 {
1400         struct ath_softc *sc = hw->priv;
1401         u32 rfilt;
1402
1403         changed_flags &= SUPPORTED_FILTERS;
1404         *total_flags &= SUPPORTED_FILTERS;
1405
1406         sc->rx_filter = *total_flags;
1407         rfilt = ath_calcrxfilter(sc);
1408         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1409
1410         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1411                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1412                         ath9k_hw_write_associd(sc->sc_ah, ath_bcast_mac, 0);
1413         }
1414
1415         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set HW RX filter: 0x%x\n",
1416                 __func__, sc->rx_filter);
1417 }
1418
1419 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1420                              struct ieee80211_vif *vif,
1421                              enum sta_notify_cmd cmd,
1422                              struct ieee80211_sta *sta)
1423 {
1424         struct ath_softc *sc = hw->priv;
1425         struct ath_node *an;
1426         unsigned long flags;
1427         DECLARE_MAC_BUF(mac);
1428
1429         spin_lock_irqsave(&sc->node_lock, flags);
1430         an = ath_node_find(sc, sta->addr);
1431         spin_unlock_irqrestore(&sc->node_lock, flags);
1432
1433         switch (cmd) {
1434         case STA_NOTIFY_ADD:
1435                 spin_lock_irqsave(&sc->node_lock, flags);
1436                 if (!an) {
1437                         ath_node_attach(sc, sta->addr, 0);
1438                         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a node: %s\n",
1439                                 __func__, print_mac(mac, sta->addr));
1440                 } else {
1441                         ath_node_get(sc, sta->addr);
1442                 }
1443                 spin_unlock_irqrestore(&sc->node_lock, flags);
1444                 break;
1445         case STA_NOTIFY_REMOVE:
1446                 if (!an)
1447                         DPRINTF(sc, ATH_DBG_FATAL,
1448                                 "%s: Removal of a non-existent node\n",
1449                                 __func__);
1450                 else {
1451                         ath_node_put(sc, an, ATH9K_BH_STATUS_INTACT);
1452                         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Put a node: %s\n",
1453                                 __func__,
1454                                 print_mac(mac, sta->addr));
1455                 }
1456                 break;
1457         default:
1458                 break;
1459         }
1460 }
1461
1462 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1463                          u16 queue,
1464                          const struct ieee80211_tx_queue_params *params)
1465 {
1466         struct ath_softc *sc = hw->priv;
1467         struct ath9k_tx_queue_info qi;
1468         int ret = 0, qnum;
1469
1470         if (queue >= WME_NUM_AC)
1471                 return 0;
1472
1473         qi.tqi_aifs = params->aifs;
1474         qi.tqi_cwmin = params->cw_min;
1475         qi.tqi_cwmax = params->cw_max;
1476         qi.tqi_burstTime = params->txop;
1477         qnum = ath_get_hal_qnum(queue, sc);
1478
1479         DPRINTF(sc, ATH_DBG_CONFIG,
1480                 "%s: Configure tx [queue/halq] [%d/%d],  "
1481                 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1482                 __func__,
1483                 queue,
1484                 qnum,
1485                 params->aifs,
1486                 params->cw_min,
1487                 params->cw_max,
1488                 params->txop);
1489
1490         ret = ath_txq_update(sc, qnum, &qi);
1491         if (ret)
1492                 DPRINTF(sc, ATH_DBG_FATAL,
1493                         "%s: TXQ Update failed\n", __func__);
1494
1495         return ret;
1496 }
1497
1498 static int ath9k_set_key(struct ieee80211_hw *hw,
1499                          enum set_key_cmd cmd,
1500                          const u8 *local_addr,
1501                          const u8 *addr,
1502                          struct ieee80211_key_conf *key)
1503 {
1504         struct ath_softc *sc = hw->priv;
1505         int ret = 0;
1506
1507         DPRINTF(sc, ATH_DBG_KEYCACHE, " %s: Set HW Key\n", __func__);
1508
1509         switch (cmd) {
1510         case SET_KEY:
1511                 ret = ath_key_config(sc, addr, key);
1512                 if (!ret) {
1513                         set_bit(key->keyidx, sc->sc_keymap);
1514                         key->hw_key_idx = key->keyidx;
1515                         /* push IV and Michael MIC generation to stack */
1516                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1517                         if (key->alg == ALG_TKIP)
1518                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1519                 }
1520                 break;
1521         case DISABLE_KEY:
1522                 ath_key_delete(sc, key);
1523                 clear_bit(key->keyidx, sc->sc_keymap);
1524                 break;
1525         default:
1526                 ret = -EINVAL;
1527         }
1528
1529         return ret;
1530 }
1531
1532 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1533                                    struct ieee80211_vif *vif,
1534                                    struct ieee80211_bss_conf *bss_conf,
1535                                    u32 changed)
1536 {
1537         struct ath_softc *sc = hw->priv;
1538
1539         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1540                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed PREAMBLE %d\n",
1541                         __func__,
1542                         bss_conf->use_short_preamble);
1543                 if (bss_conf->use_short_preamble)
1544                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
1545                 else
1546                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
1547         }
1548
1549         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1550                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed CTS PROT %d\n",
1551                         __func__,
1552                         bss_conf->use_cts_prot);
1553                 if (bss_conf->use_cts_prot &&
1554                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
1555                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
1556                 else
1557                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
1558         }
1559
1560         if (changed & BSS_CHANGED_HT) {
1561                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed HT %d\n",
1562                         __func__,
1563                         bss_conf->assoc_ht);
1564                 ath9k_ht_conf(sc, bss_conf);
1565         }
1566
1567         if (changed & BSS_CHANGED_ASSOC) {
1568                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed ASSOC %d\n",
1569                         __func__,
1570                         bss_conf->assoc);
1571                 ath9k_bss_assoc_info(sc, bss_conf);
1572         }
1573 }
1574
1575 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
1576 {
1577         u64 tsf;
1578         struct ath_softc *sc = hw->priv;
1579         struct ath_hal *ah = sc->sc_ah;
1580
1581         tsf = ath9k_hw_gettsf64(ah);
1582
1583         return tsf;
1584 }
1585
1586 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
1587 {
1588         struct ath_softc *sc = hw->priv;
1589         struct ath_hal *ah = sc->sc_ah;
1590
1591         ath9k_hw_reset_tsf(ah);
1592 }
1593
1594 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1595                        enum ieee80211_ampdu_mlme_action action,
1596                        struct ieee80211_sta *sta,
1597                        u16 tid, u16 *ssn)
1598 {
1599         struct ath_softc *sc = hw->priv;
1600         int ret = 0;
1601
1602         switch (action) {
1603         case IEEE80211_AMPDU_RX_START:
1604                 ret = ath_rx_aggr_start(sc, sta->addr, tid, ssn);
1605                 if (ret < 0)
1606                         DPRINTF(sc, ATH_DBG_FATAL,
1607                                 "%s: Unable to start RX aggregation\n",
1608                                 __func__);
1609                 break;
1610         case IEEE80211_AMPDU_RX_STOP:
1611                 ret = ath_rx_aggr_stop(sc, sta->addr, tid);
1612                 if (ret < 0)
1613                         DPRINTF(sc, ATH_DBG_FATAL,
1614                                 "%s: Unable to stop RX aggregation\n",
1615                                 __func__);
1616                 break;
1617         case IEEE80211_AMPDU_TX_START:
1618                 ret = ath_tx_aggr_start(sc, sta->addr, tid, ssn);
1619                 if (ret < 0)
1620                         DPRINTF(sc, ATH_DBG_FATAL,
1621                                 "%s: Unable to start TX aggregation\n",
1622                                 __func__);
1623                 else
1624                         ieee80211_start_tx_ba_cb_irqsafe(hw, sta->addr, tid);
1625                 break;
1626         case IEEE80211_AMPDU_TX_STOP:
1627                 ret = ath_tx_aggr_stop(sc, sta->addr, tid);
1628                 if (ret < 0)
1629                         DPRINTF(sc, ATH_DBG_FATAL,
1630                                 "%s: Unable to stop TX aggregation\n",
1631                                 __func__);
1632
1633                 ieee80211_stop_tx_ba_cb_irqsafe(hw, sta->addr, tid);
1634                 break;
1635         default:
1636                 DPRINTF(sc, ATH_DBG_FATAL,
1637                         "%s: Unknown AMPDU action\n", __func__);
1638         }
1639
1640         return ret;
1641 }
1642
1643 static int ath9k_no_fragmentation(struct ieee80211_hw *hw, u32 value)
1644 {
1645         return -EOPNOTSUPP;
1646 }
1647
1648 static struct ieee80211_ops ath9k_ops = {
1649         .tx                 = ath9k_tx,
1650         .start              = ath9k_start,
1651         .stop               = ath9k_stop,
1652         .add_interface      = ath9k_add_interface,
1653         .remove_interface   = ath9k_remove_interface,
1654         .config             = ath9k_config,
1655         .config_interface   = ath9k_config_interface,
1656         .configure_filter   = ath9k_configure_filter,
1657         .get_stats          = NULL,
1658         .sta_notify         = ath9k_sta_notify,
1659         .conf_tx            = ath9k_conf_tx,
1660         .get_tx_stats       = NULL,
1661         .bss_info_changed   = ath9k_bss_info_changed,
1662         .set_tim            = NULL,
1663         .set_key            = ath9k_set_key,
1664         .hw_scan            = NULL,
1665         .get_tkip_seq       = NULL,
1666         .set_rts_threshold  = NULL,
1667         .set_frag_threshold = NULL,
1668         .set_retry_limit    = NULL,
1669         .get_tsf            = ath9k_get_tsf,
1670         .reset_tsf          = ath9k_reset_tsf,
1671         .tx_last_beacon     = NULL,
1672         .ampdu_action       = ath9k_ampdu_action,
1673         .set_frag_threshold = ath9k_no_fragmentation,
1674 };
1675
1676 static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1677 {
1678         void __iomem *mem;
1679         struct ath_softc *sc;
1680         struct ieee80211_hw *hw;
1681         const char *athname;
1682         u8 csz;
1683         u32 val;
1684         int ret = 0;
1685
1686         if (pci_enable_device(pdev))
1687                 return -EIO;
1688
1689         /* XXX 32-bit addressing only */
1690         if (pci_set_dma_mask(pdev, 0xffffffff)) {
1691                 printk(KERN_ERR "ath_pci: 32-bit DMA not available\n");
1692                 ret = -ENODEV;
1693                 goto bad;
1694         }
1695
1696         /*
1697          * Cache line size is used to size and align various
1698          * structures used to communicate with the hardware.
1699          */
1700         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
1701         if (csz == 0) {
1702                 /*
1703                  * Linux 2.4.18 (at least) writes the cache line size
1704                  * register as a 16-bit wide register which is wrong.
1705                  * We must have this setup properly for rx buffer
1706                  * DMA to work so force a reasonable value here if it
1707                  * comes up zero.
1708                  */
1709                 csz = L1_CACHE_BYTES / sizeof(u32);
1710                 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
1711         }
1712         /*
1713          * The default setting of latency timer yields poor results,
1714          * set it to the value used by other systems. It may be worth
1715          * tweaking this setting more.
1716          */
1717         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
1718
1719         pci_set_master(pdev);
1720
1721         /*
1722          * Disable the RETRY_TIMEOUT register (0x41) to keep
1723          * PCI Tx retries from interfering with C3 CPU state.
1724          */
1725         pci_read_config_dword(pdev, 0x40, &val);
1726         if ((val & 0x0000ff00) != 0)
1727                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1728
1729         ret = pci_request_region(pdev, 0, "ath9k");
1730         if (ret) {
1731                 dev_err(&pdev->dev, "PCI memory region reserve error\n");
1732                 ret = -ENODEV;
1733                 goto bad;
1734         }
1735
1736         mem = pci_iomap(pdev, 0, 0);
1737         if (!mem) {
1738                 printk(KERN_ERR "PCI memory map error\n") ;
1739                 ret = -EIO;
1740                 goto bad1;
1741         }
1742
1743         hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
1744         if (hw == NULL) {
1745                 printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n");
1746                 goto bad2;
1747         }
1748
1749         hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
1750                 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
1751                 IEEE80211_HW_SIGNAL_DBM |
1752                 IEEE80211_HW_NOISE_DBM;
1753
1754         hw->wiphy->interface_modes =
1755                 BIT(NL80211_IFTYPE_AP) |
1756                 BIT(NL80211_IFTYPE_STATION) |
1757                 BIT(NL80211_IFTYPE_ADHOC);
1758
1759         SET_IEEE80211_DEV(hw, &pdev->dev);
1760         pci_set_drvdata(pdev, hw);
1761
1762         sc = hw->priv;
1763         sc->hw = hw;
1764         sc->pdev = pdev;
1765         sc->mem = mem;
1766
1767         if (ath_attach(id->device, sc) != 0) {
1768                 ret = -ENODEV;
1769                 goto bad3;
1770         }
1771
1772         /* setup interrupt service routine */
1773
1774         if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) {
1775                 printk(KERN_ERR "%s: request_irq failed\n",
1776                         wiphy_name(hw->wiphy));
1777                 ret = -EIO;
1778                 goto bad4;
1779         }
1780
1781         athname = ath9k_hw_probe(id->vendor, id->device);
1782
1783         printk(KERN_INFO "%s: %s: mem=0x%lx, irq=%d\n",
1784                wiphy_name(hw->wiphy),
1785                athname ? athname : "Atheros ???",
1786                (unsigned long)mem, pdev->irq);
1787
1788         return 0;
1789 bad4:
1790         ath_detach(sc);
1791 bad3:
1792         ieee80211_free_hw(hw);
1793 bad2:
1794         pci_iounmap(pdev, mem);
1795 bad1:
1796         pci_release_region(pdev, 0);
1797 bad:
1798         pci_disable_device(pdev);
1799         return ret;
1800 }
1801
1802 static void ath_pci_remove(struct pci_dev *pdev)
1803 {
1804         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1805         struct ath_softc *sc = hw->priv;
1806         enum ath9k_int status;
1807
1808         if (pdev->irq) {
1809                 ath9k_hw_set_interrupts(sc->sc_ah, 0);
1810                 /* clear the ISR */
1811                 ath9k_hw_getisr(sc->sc_ah, &status);
1812                 sc->sc_flags |= SC_OP_INVALID;
1813                 free_irq(pdev->irq, sc);
1814         }
1815         ath_detach(sc);
1816
1817         pci_iounmap(pdev, sc->mem);
1818         pci_release_region(pdev, 0);
1819         pci_disable_device(pdev);
1820         ieee80211_free_hw(hw);
1821 }
1822
1823 #ifdef CONFIG_PM
1824
1825 static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
1826 {
1827         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1828         struct ath_softc *sc = hw->priv;
1829
1830         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
1831
1832 #ifdef CONFIG_RFKILL
1833         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1834                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
1835 #endif
1836
1837         pci_save_state(pdev);
1838         pci_disable_device(pdev);
1839         pci_set_power_state(pdev, 3);
1840
1841         return 0;
1842 }
1843
1844 static int ath_pci_resume(struct pci_dev *pdev)
1845 {
1846         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1847         struct ath_softc *sc = hw->priv;
1848         u32 val;
1849         int err;
1850
1851         err = pci_enable_device(pdev);
1852         if (err)
1853                 return err;
1854         pci_restore_state(pdev);
1855         /*
1856          * Suspend/Resume resets the PCI configuration space, so we have to
1857          * re-disable the RETRY_TIMEOUT register (0x41) to keep
1858          * PCI Tx retries from interfering with C3 CPU state
1859          */
1860         pci_read_config_dword(pdev, 0x40, &val);
1861         if ((val & 0x0000ff00) != 0)
1862                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1863
1864         /* Enable LED */
1865         ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
1866                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1867         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
1868
1869 #ifdef CONFIG_RFKILL
1870         /*
1871          * check the h/w rfkill state on resume
1872          * and start the rfkill poll timer
1873          */
1874         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1875                 queue_delayed_work(sc->hw->workqueue,
1876                                    &sc->rf_kill.rfkill_poll, 0);
1877 #endif
1878
1879         return 0;
1880 }
1881
1882 #endif /* CONFIG_PM */
1883
1884 MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
1885
1886 static struct pci_driver ath_pci_driver = {
1887         .name       = "ath9k",
1888         .id_table   = ath_pci_id_table,
1889         .probe      = ath_pci_probe,
1890         .remove     = ath_pci_remove,
1891 #ifdef CONFIG_PM
1892         .suspend    = ath_pci_suspend,
1893         .resume     = ath_pci_resume,
1894 #endif /* CONFIG_PM */
1895 };
1896
1897 static int __init init_ath_pci(void)
1898 {
1899         printk(KERN_INFO "%s: %s\n", dev_info, ATH_PCI_VERSION);
1900
1901         if (pci_register_driver(&ath_pci_driver) < 0) {
1902                 printk(KERN_ERR
1903                         "ath_pci: No devices found, driver not installed.\n");
1904                 pci_unregister_driver(&ath_pci_driver);
1905                 return -ENODEV;
1906         }
1907
1908         return 0;
1909 }
1910 module_init(init_ath_pci);
1911
1912 static void __exit exit_ath_pci(void)
1913 {
1914         pci_unregister_driver(&ath_pci_driver);
1915         printk(KERN_INFO "%s: driver unloaded\n", dev_info);
1916 }
1917 module_exit(exit_ath_pci);