ath9k: Race condition in accessing TX and RX buffers.
[linux-2.6.git] / drivers / net / wireless / ath9k / main.c
1 /*
2  * Copyright (c) 2008 Atheros Communications Inc.
3  *
4  * Permission to use, copy, modify, and/or distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16
17 /* mac80211 and PCI callbacks */
18
19 #include <linux/nl80211.h>
20 #include "core.h"
21 #include "reg.h"
22
23 #define ATH_PCI_VERSION "0.1"
24
25 static char *dev_info = "ath9k";
26
27 MODULE_AUTHOR("Atheros Communications");
28 MODULE_DESCRIPTION("Support for Atheros 802.11n wireless LAN cards.");
29 MODULE_SUPPORTED_DEVICE("Atheros 802.11n WLAN cards");
30 MODULE_LICENSE("Dual BSD/GPL");
31
32 static struct pci_device_id ath_pci_id_table[] __devinitdata = {
33         { PCI_VDEVICE(ATHEROS, 0x0023) }, /* PCI   */
34         { PCI_VDEVICE(ATHEROS, 0x0024) }, /* PCI-E */
35         { PCI_VDEVICE(ATHEROS, 0x0027) }, /* PCI   */
36         { PCI_VDEVICE(ATHEROS, 0x0029) }, /* PCI   */
37         { PCI_VDEVICE(ATHEROS, 0x002A) }, /* PCI-E */
38         { 0 }
39 };
40
41 static void ath_detach(struct ath_softc *sc);
42
43 static int ath_get_channel(struct ath_softc *sc,
44                            struct ieee80211_channel *chan)
45 {
46         int i;
47
48         for (i = 0; i < sc->sc_ah->ah_nchan; i++) {
49                 if (sc->sc_ah->ah_channels[i].channel == chan->center_freq)
50                         return i;
51         }
52
53         return -1;
54 }
55
56 static u32 ath_get_extchanmode(struct ath_softc *sc,
57                                      struct ieee80211_channel *chan)
58 {
59         u32 chanmode = 0;
60         u8 ext_chan_offset = sc->sc_ht_info.ext_chan_offset;
61         enum ath9k_ht_macmode tx_chan_width = sc->sc_ht_info.tx_chan_width;
62
63         switch (chan->band) {
64         case IEEE80211_BAND_2GHZ:
65                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE) &&
66                     (tx_chan_width == ATH9K_HT_MACMODE_20))
67                         chanmode = CHANNEL_G_HT20;
68                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) &&
69                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
70                         chanmode = CHANNEL_G_HT40PLUS;
71                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) &&
72                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
73                         chanmode = CHANNEL_G_HT40MINUS;
74                 break;
75         case IEEE80211_BAND_5GHZ:
76                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE) &&
77                     (tx_chan_width == ATH9K_HT_MACMODE_20))
78                         chanmode = CHANNEL_A_HT20;
79                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) &&
80                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
81                         chanmode = CHANNEL_A_HT40PLUS;
82                 if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) &&
83                     (tx_chan_width == ATH9K_HT_MACMODE_2040))
84                         chanmode = CHANNEL_A_HT40MINUS;
85                 break;
86         default:
87                 break;
88         }
89
90         return chanmode;
91 }
92
93
94 static int ath_setkey_tkip(struct ath_softc *sc,
95                            struct ieee80211_key_conf *key,
96                            struct ath9k_keyval *hk,
97                            const u8 *addr)
98 {
99         u8 *key_rxmic = NULL;
100         u8 *key_txmic = NULL;
101
102         key_txmic = key->key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY;
103         key_rxmic = key->key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY;
104
105         if (addr == NULL) {
106                 /* Group key installation */
107                 memcpy(hk->kv_mic,  key_rxmic, sizeof(hk->kv_mic));
108                 return ath_keyset(sc, key->keyidx, hk, addr);
109         }
110         if (!sc->sc_splitmic) {
111                 /*
112                  * data key goes at first index,
113                  * the hal handles the MIC keys at index+64.
114                  */
115                 memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
116                 memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic));
117                 return ath_keyset(sc, key->keyidx, hk, addr);
118         }
119         /*
120          * TX key goes at first index, RX key at +32.
121          * The hal handles the MIC keys at index+64.
122          */
123         memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
124         if (!ath_keyset(sc, key->keyidx, hk, NULL)) {
125                 /* Txmic entry failed. No need to proceed further */
126                 DPRINTF(sc, ATH_DBG_KEYCACHE,
127                         "%s Setting TX MIC Key Failed\n", __func__);
128                 return 0;
129         }
130
131         memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
132         /* XXX delete tx key on failure? */
133         return ath_keyset(sc, key->keyidx+32, hk, addr);
134 }
135
136 static int ath_key_config(struct ath_softc *sc,
137                           const u8 *addr,
138                           struct ieee80211_key_conf *key)
139 {
140         struct ieee80211_vif *vif;
141         struct ath9k_keyval hk;
142         const u8 *mac = NULL;
143         int ret = 0;
144         enum nl80211_iftype opmode;
145
146         memset(&hk, 0, sizeof(hk));
147
148         switch (key->alg) {
149         case ALG_WEP:
150                 hk.kv_type = ATH9K_CIPHER_WEP;
151                 break;
152         case ALG_TKIP:
153                 hk.kv_type = ATH9K_CIPHER_TKIP;
154                 break;
155         case ALG_CCMP:
156                 hk.kv_type = ATH9K_CIPHER_AES_CCM;
157                 break;
158         default:
159                 return -EINVAL;
160         }
161
162         hk.kv_len  = key->keylen;
163         memcpy(hk.kv_val, key->key, key->keylen);
164
165         if (!sc->sc_vaps[0])
166                 return -EIO;
167
168         vif = sc->sc_vaps[0];
169         opmode = vif->type;
170
171         /*
172          *  Strategy:
173          *   For _M_STA mc tx, we will not setup a key at all since we never
174          *   tx mc.
175          *   _M_STA mc rx, we will use the keyID.
176          *   for _M_IBSS mc tx, we will use the keyID, and no macaddr.
177          *   for _M_IBSS mc rx, we will alloc a slot and plumb the mac of the
178          *   peer node. BUT we will plumb a cleartext key so that we can do
179          *   perSta default key table lookup in software.
180          */
181         if (is_broadcast_ether_addr(addr)) {
182                 switch (opmode) {
183                 case NL80211_IFTYPE_STATION:
184                         /* default key:  could be group WPA key
185                          * or could be static WEP key */
186                         mac = NULL;
187                         break;
188                 case NL80211_IFTYPE_ADHOC:
189                         break;
190                 case NL80211_IFTYPE_AP:
191                         break;
192                 default:
193                         ASSERT(0);
194                         break;
195                 }
196         } else {
197                 mac = addr;
198         }
199
200         if (key->alg == ALG_TKIP)
201                 ret = ath_setkey_tkip(sc, key, &hk, mac);
202         else
203                 ret = ath_keyset(sc, key->keyidx, &hk, mac);
204
205         if (!ret)
206                 return -EIO;
207
208         return 0;
209 }
210
211 static void ath_key_delete(struct ath_softc *sc, struct ieee80211_key_conf *key)
212 {
213         int freeslot;
214
215         freeslot = (key->keyidx >= 4) ? 1 : 0;
216         ath_key_reset(sc, key->keyidx, freeslot);
217 }
218
219 static void setup_ht_cap(struct ieee80211_sta_ht_cap *ht_info)
220 {
221 #define ATH9K_HT_CAP_MAXRXAMPDU_65536 0x3       /* 2 ^ 16 */
222 #define ATH9K_HT_CAP_MPDUDENSITY_8 0x6          /* 8 usec */
223
224         ht_info->ht_supported = true;
225         ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
226                        IEEE80211_HT_CAP_SM_PS |
227                        IEEE80211_HT_CAP_SGI_40 |
228                        IEEE80211_HT_CAP_DSSSCCK40;
229
230         ht_info->ampdu_factor = ATH9K_HT_CAP_MAXRXAMPDU_65536;
231         ht_info->ampdu_density = ATH9K_HT_CAP_MPDUDENSITY_8;
232         /* set up supported mcs set */
233         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
234         ht_info->mcs.rx_mask[0] = 0xff;
235         ht_info->mcs.rx_mask[1] = 0xff;
236         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
237 }
238
239 static int ath_rate2idx(struct ath_softc *sc, int rate)
240 {
241         int i = 0, cur_band, n_rates;
242         struct ieee80211_hw *hw = sc->hw;
243
244         cur_band = hw->conf.channel->band;
245         n_rates = sc->sbands[cur_band].n_bitrates;
246
247         for (i = 0; i < n_rates; i++) {
248                 if (sc->sbands[cur_band].bitrates[i].bitrate == rate)
249                         break;
250         }
251
252         /*
253          * NB:mac80211 validates rx rate index against the supported legacy rate
254          * index only (should be done against ht rates also), return the highest
255          * legacy rate index for rx rate which does not match any one of the
256          * supported basic and extended rates to make mac80211 happy.
257          * The following hack will be cleaned up once the issue with
258          * the rx rate index validation in mac80211 is fixed.
259          */
260         if (i == n_rates)
261                 return n_rates - 1;
262         return i;
263 }
264
265 static void ath9k_rx_prepare(struct ath_softc *sc,
266                              struct sk_buff *skb,
267                              struct ath_recv_status *status,
268                              struct ieee80211_rx_status *rx_status)
269 {
270         struct ieee80211_hw *hw = sc->hw;
271         struct ieee80211_channel *curchan = hw->conf.channel;
272
273         memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
274
275         rx_status->mactime = status->tsf;
276         rx_status->band = curchan->band;
277         rx_status->freq =  curchan->center_freq;
278         rx_status->noise = sc->sc_ani.sc_noise_floor;
279         rx_status->signal = rx_status->noise + status->rssi;
280         rx_status->rate_idx = ath_rate2idx(sc, (status->rateKbps / 100));
281         rx_status->antenna = status->antenna;
282
283         /* at 45 you will be able to use MCS 15 reliably. A more elaborate
284          * scheme can be used here but it requires tables of SNR/throughput for
285          * each possible mode used. */
286         rx_status->qual = status->rssi * 100 / 45;
287
288         /* rssi can be more than 45 though, anything above that
289          * should be considered at 100% */
290         if (rx_status->qual > 100)
291                 rx_status->qual = 100;
292
293         if (status->flags & ATH_RX_MIC_ERROR)
294                 rx_status->flag |= RX_FLAG_MMIC_ERROR;
295         if (status->flags & ATH_RX_FCS_ERROR)
296                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
297
298         rx_status->flag |= RX_FLAG_TSFT;
299 }
300
301 static void ath9k_ht_conf(struct ath_softc *sc,
302                           struct ieee80211_bss_conf *bss_conf)
303 {
304         struct ath_ht_info *ht_info = &sc->sc_ht_info;
305
306         if (sc->hw->conf.ht.enabled) {
307                 ht_info->ext_chan_offset = bss_conf->ht.secondary_channel_offset;
308
309                 if (bss_conf->ht.width_40_ok)
310                         ht_info->tx_chan_width = ATH9K_HT_MACMODE_2040;
311                 else
312                         ht_info->tx_chan_width = ATH9K_HT_MACMODE_20;
313
314                 ath9k_hw_set11nmac2040(sc->sc_ah, ht_info->tx_chan_width);
315         }
316 }
317
318 static void ath9k_bss_assoc_info(struct ath_softc *sc,
319                                  struct ieee80211_vif *vif,
320                                  struct ieee80211_bss_conf *bss_conf)
321 {
322         struct ieee80211_hw *hw = sc->hw;
323         struct ieee80211_channel *curchan = hw->conf.channel;
324         struct ath_vap *avp = (void *)vif->drv_priv;
325         int pos;
326
327         if (bss_conf->assoc) {
328                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Bss Info ASSOC %d\n",
329                         __func__,
330                         bss_conf->aid);
331
332                 /* New association, store aid */
333                 if (avp->av_opmode == ATH9K_M_STA) {
334                         sc->sc_curaid = bss_conf->aid;
335                         ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
336                                                sc->sc_curaid);
337                 }
338
339                 /* Configure the beacon */
340                 ath_beacon_config(sc, 0);
341                 sc->sc_flags |= SC_OP_BEACONS;
342
343                 /* Reset rssi stats */
344                 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER;
345                 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER;
346                 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER;
347                 sc->sc_halstats.ns_avgtxrate = ATH_RATE_DUMMY_MARKER;
348
349                 /* Update chainmask */
350                 ath_update_chainmask(sc, hw->conf.ht.enabled);
351
352                 DPRINTF(sc, ATH_DBG_CONFIG,
353                         "%s: bssid %pM aid 0x%x\n",
354                         __func__,
355                         sc->sc_curbssid, sc->sc_curaid);
356
357                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
358                         __func__,
359                         curchan->center_freq);
360
361                 pos = ath_get_channel(sc, curchan);
362                 if (pos == -1) {
363                         DPRINTF(sc, ATH_DBG_FATAL,
364                                 "%s: Invalid channel\n", __func__);
365                         return;
366                 }
367
368                 if (hw->conf.ht.enabled)
369                         sc->sc_ah->ah_channels[pos].chanmode =
370                                 ath_get_extchanmode(sc, curchan);
371                 else
372                         sc->sc_ah->ah_channels[pos].chanmode =
373                                 (curchan->band == IEEE80211_BAND_2GHZ) ?
374                                 CHANNEL_G : CHANNEL_A;
375
376                 /* set h/w channel */
377                 if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
378                         DPRINTF(sc, ATH_DBG_FATAL,
379                                 "%s: Unable to set channel\n",
380                                 __func__);
381
382                 ath_rate_newstate(sc, avp);
383                 /* Update ratectrl about the new state */
384                 ath_rc_node_update(hw, avp->rc_node);
385
386                 /* Start ANI */
387                 mod_timer(&sc->sc_ani.timer,
388                         jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
389
390         } else {
391                 DPRINTF(sc, ATH_DBG_CONFIG,
392                 "%s: Bss Info DISSOC\n", __func__);
393                 sc->sc_curaid = 0;
394         }
395 }
396
397 void ath_get_beaconconfig(struct ath_softc *sc,
398                           int if_id,
399                           struct ath_beacon_config *conf)
400 {
401         struct ieee80211_hw *hw = sc->hw;
402
403         /* fill in beacon config data */
404
405         conf->beacon_interval = hw->conf.beacon_int;
406         conf->listen_interval = 100;
407         conf->dtim_count = 1;
408         conf->bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf->listen_interval;
409 }
410
411 void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
412                      struct ath_xmit_status *tx_status)
413 {
414         struct ieee80211_hw *hw = sc->hw;
415         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
416
417         DPRINTF(sc, ATH_DBG_XMIT,
418                 "%s: TX complete: skb: %p\n", __func__, skb);
419
420         ieee80211_tx_info_clear_status(tx_info);
421         if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK ||
422                 tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
423                 /* free driver's private data area of tx_info, XXX: HACK! */
424                 if (tx_info->control.vif != NULL)
425                         kfree(tx_info->control.vif);
426                         tx_info->control.vif = NULL;
427         }
428
429         if (tx_status->flags & ATH_TX_BAR) {
430                 tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
431                 tx_status->flags &= ~ATH_TX_BAR;
432         }
433
434         if (!(tx_status->flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) {
435                 /* Frame was ACKed */
436                 tx_info->flags |= IEEE80211_TX_STAT_ACK;
437         }
438
439         tx_info->status.rates[0].count = tx_status->retries + 1;
440
441         ieee80211_tx_status(hw, skb);
442 }
443
444 int _ath_rx_indicate(struct ath_softc *sc,
445                      struct sk_buff *skb,
446                      struct ath_recv_status *status,
447                      u16 keyix)
448 {
449         struct ieee80211_hw *hw = sc->hw;
450         struct ieee80211_rx_status rx_status;
451         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
452         int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
453         int padsize;
454
455         /* see if any padding is done by the hw and remove it */
456         if (hdrlen & 3) {
457                 padsize = hdrlen % 4;
458                 memmove(skb->data + padsize, skb->data, hdrlen);
459                 skb_pull(skb, padsize);
460         }
461
462         /* Prepare rx status */
463         ath9k_rx_prepare(sc, skb, status, &rx_status);
464
465         if (!(keyix == ATH9K_RXKEYIX_INVALID) &&
466             !(status->flags & ATH_RX_DECRYPT_ERROR)) {
467                 rx_status.flag |= RX_FLAG_DECRYPTED;
468         } else if ((le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_PROTECTED)
469                    && !(status->flags & ATH_RX_DECRYPT_ERROR)
470                    && skb->len >= hdrlen + 4) {
471                 keyix = skb->data[hdrlen + 3] >> 6;
472
473                 if (test_bit(keyix, sc->sc_keymap))
474                         rx_status.flag |= RX_FLAG_DECRYPTED;
475         }
476
477         __ieee80211_rx(hw, skb, &rx_status);
478
479         return 0;
480 }
481
482 /********************************/
483 /*       LED functions          */
484 /********************************/
485
486 static void ath_led_brightness(struct led_classdev *led_cdev,
487                                enum led_brightness brightness)
488 {
489         struct ath_led *led = container_of(led_cdev, struct ath_led, led_cdev);
490         struct ath_softc *sc = led->sc;
491
492         switch (brightness) {
493         case LED_OFF:
494                 if (led->led_type == ATH_LED_ASSOC ||
495                     led->led_type == ATH_LED_RADIO)
496                         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
497                 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN,
498                                 (led->led_type == ATH_LED_RADIO) ? 1 :
499                                 !!(sc->sc_flags & SC_OP_LED_ASSOCIATED));
500                 break;
501         case LED_FULL:
502                 if (led->led_type == ATH_LED_ASSOC)
503                         sc->sc_flags |= SC_OP_LED_ASSOCIATED;
504                 ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 0);
505                 break;
506         default:
507                 break;
508         }
509 }
510
511 static int ath_register_led(struct ath_softc *sc, struct ath_led *led,
512                             char *trigger)
513 {
514         int ret;
515
516         led->sc = sc;
517         led->led_cdev.name = led->name;
518         led->led_cdev.default_trigger = trigger;
519         led->led_cdev.brightness_set = ath_led_brightness;
520
521         ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->led_cdev);
522         if (ret)
523                 DPRINTF(sc, ATH_DBG_FATAL,
524                         "Failed to register led:%s", led->name);
525         else
526                 led->registered = 1;
527         return ret;
528 }
529
530 static void ath_unregister_led(struct ath_led *led)
531 {
532         if (led->registered) {
533                 led_classdev_unregister(&led->led_cdev);
534                 led->registered = 0;
535         }
536 }
537
538 static void ath_deinit_leds(struct ath_softc *sc)
539 {
540         ath_unregister_led(&sc->assoc_led);
541         sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
542         ath_unregister_led(&sc->tx_led);
543         ath_unregister_led(&sc->rx_led);
544         ath_unregister_led(&sc->radio_led);
545         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
546 }
547
548 static void ath_init_leds(struct ath_softc *sc)
549 {
550         char *trigger;
551         int ret;
552
553         /* Configure gpio 1 for output */
554         ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
555                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
556         /* LED off, active low */
557         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
558
559         trigger = ieee80211_get_radio_led_name(sc->hw);
560         snprintf(sc->radio_led.name, sizeof(sc->radio_led.name),
561                 "ath9k-%s:radio", wiphy_name(sc->hw->wiphy));
562         ret = ath_register_led(sc, &sc->radio_led, trigger);
563         sc->radio_led.led_type = ATH_LED_RADIO;
564         if (ret)
565                 goto fail;
566
567         trigger = ieee80211_get_assoc_led_name(sc->hw);
568         snprintf(sc->assoc_led.name, sizeof(sc->assoc_led.name),
569                 "ath9k-%s:assoc", wiphy_name(sc->hw->wiphy));
570         ret = ath_register_led(sc, &sc->assoc_led, trigger);
571         sc->assoc_led.led_type = ATH_LED_ASSOC;
572         if (ret)
573                 goto fail;
574
575         trigger = ieee80211_get_tx_led_name(sc->hw);
576         snprintf(sc->tx_led.name, sizeof(sc->tx_led.name),
577                 "ath9k-%s:tx", wiphy_name(sc->hw->wiphy));
578         ret = ath_register_led(sc, &sc->tx_led, trigger);
579         sc->tx_led.led_type = ATH_LED_TX;
580         if (ret)
581                 goto fail;
582
583         trigger = ieee80211_get_rx_led_name(sc->hw);
584         snprintf(sc->rx_led.name, sizeof(sc->rx_led.name),
585                 "ath9k-%s:rx", wiphy_name(sc->hw->wiphy));
586         ret = ath_register_led(sc, &sc->rx_led, trigger);
587         sc->rx_led.led_type = ATH_LED_RX;
588         if (ret)
589                 goto fail;
590
591         return;
592
593 fail:
594         ath_deinit_leds(sc);
595 }
596
597 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
598
599 /*******************/
600 /*      Rfkill     */
601 /*******************/
602
603 static void ath_radio_enable(struct ath_softc *sc)
604 {
605         struct ath_hal *ah = sc->sc_ah;
606         int status;
607
608         spin_lock_bh(&sc->sc_resetlock);
609         if (!ath9k_hw_reset(ah, ah->ah_curchan,
610                             sc->sc_ht_info.tx_chan_width,
611                             sc->sc_tx_chainmask,
612                             sc->sc_rx_chainmask,
613                             sc->sc_ht_extprotspacing,
614                             false, &status)) {
615                 DPRINTF(sc, ATH_DBG_FATAL,
616                         "%s: unable to reset channel %u (%uMhz) "
617                         "flags 0x%x hal status %u\n", __func__,
618                         ath9k_hw_mhz2ieee(ah,
619                                           ah->ah_curchan->channel,
620                                           ah->ah_curchan->channelFlags),
621                         ah->ah_curchan->channel,
622                         ah->ah_curchan->channelFlags, status);
623         }
624         spin_unlock_bh(&sc->sc_resetlock);
625
626         ath_update_txpow(sc);
627         if (ath_startrecv(sc) != 0) {
628                 DPRINTF(sc, ATH_DBG_FATAL,
629                         "%s: unable to restart recv logic\n", __func__);
630                 return;
631         }
632
633         if (sc->sc_flags & SC_OP_BEACONS)
634                 ath_beacon_config(sc, ATH_IF_ID_ANY);   /* restart beacons */
635
636         /* Re-Enable  interrupts */
637         ath9k_hw_set_interrupts(ah, sc->sc_imask);
638
639         /* Enable LED */
640         ath9k_hw_cfg_output(ah, ATH_LED_PIN,
641                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
642         ath9k_hw_set_gpio(ah, ATH_LED_PIN, 0);
643
644         ieee80211_wake_queues(sc->hw);
645 }
646
647 static void ath_radio_disable(struct ath_softc *sc)
648 {
649         struct ath_hal *ah = sc->sc_ah;
650         int status;
651
652
653         ieee80211_stop_queues(sc->hw);
654
655         /* Disable LED */
656         ath9k_hw_set_gpio(ah, ATH_LED_PIN, 1);
657         ath9k_hw_cfg_gpio_input(ah, ATH_LED_PIN);
658
659         /* Disable interrupts */
660         ath9k_hw_set_interrupts(ah, 0);
661
662         ath_draintxq(sc, false);        /* clear pending tx frames */
663         ath_stoprecv(sc);               /* turn off frame recv */
664         ath_flushrecv(sc);              /* flush recv queue */
665
666         spin_lock_bh(&sc->sc_resetlock);
667         if (!ath9k_hw_reset(ah, ah->ah_curchan,
668                             sc->sc_ht_info.tx_chan_width,
669                             sc->sc_tx_chainmask,
670                             sc->sc_rx_chainmask,
671                             sc->sc_ht_extprotspacing,
672                             false, &status)) {
673                 DPRINTF(sc, ATH_DBG_FATAL,
674                         "%s: unable to reset channel %u (%uMhz) "
675                         "flags 0x%x hal status %u\n", __func__,
676                         ath9k_hw_mhz2ieee(ah,
677                                 ah->ah_curchan->channel,
678                                 ah->ah_curchan->channelFlags),
679                         ah->ah_curchan->channel,
680                         ah->ah_curchan->channelFlags, status);
681         }
682         spin_unlock_bh(&sc->sc_resetlock);
683
684         ath9k_hw_phy_disable(ah);
685         ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP);
686 }
687
688 static bool ath_is_rfkill_set(struct ath_softc *sc)
689 {
690         struct ath_hal *ah = sc->sc_ah;
691
692         return ath9k_hw_gpio_get(ah, ah->ah_rfkill_gpio) ==
693                                   ah->ah_rfkill_polarity;
694 }
695
696 /* h/w rfkill poll function */
697 static void ath_rfkill_poll(struct work_struct *work)
698 {
699         struct ath_softc *sc = container_of(work, struct ath_softc,
700                                             rf_kill.rfkill_poll.work);
701         bool radio_on;
702
703         if (sc->sc_flags & SC_OP_INVALID)
704                 return;
705
706         radio_on = !ath_is_rfkill_set(sc);
707
708         /*
709          * enable/disable radio only when there is a
710          * state change in RF switch
711          */
712         if (radio_on == !!(sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED)) {
713                 enum rfkill_state state;
714
715                 if (sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED) {
716                         state = radio_on ? RFKILL_STATE_SOFT_BLOCKED
717                                 : RFKILL_STATE_HARD_BLOCKED;
718                 } else if (radio_on) {
719                         ath_radio_enable(sc);
720                         state = RFKILL_STATE_UNBLOCKED;
721                 } else {
722                         ath_radio_disable(sc);
723                         state = RFKILL_STATE_HARD_BLOCKED;
724                 }
725
726                 if (state == RFKILL_STATE_HARD_BLOCKED)
727                         sc->sc_flags |= SC_OP_RFKILL_HW_BLOCKED;
728                 else
729                         sc->sc_flags &= ~SC_OP_RFKILL_HW_BLOCKED;
730
731                 rfkill_force_state(sc->rf_kill.rfkill, state);
732         }
733
734         queue_delayed_work(sc->hw->workqueue, &sc->rf_kill.rfkill_poll,
735                            msecs_to_jiffies(ATH_RFKILL_POLL_INTERVAL));
736 }
737
738 /* s/w rfkill handler */
739 static int ath_sw_toggle_radio(void *data, enum rfkill_state state)
740 {
741         struct ath_softc *sc = data;
742
743         switch (state) {
744         case RFKILL_STATE_SOFT_BLOCKED:
745                 if (!(sc->sc_flags & (SC_OP_RFKILL_HW_BLOCKED |
746                     SC_OP_RFKILL_SW_BLOCKED)))
747                         ath_radio_disable(sc);
748                 sc->sc_flags |= SC_OP_RFKILL_SW_BLOCKED;
749                 return 0;
750         case RFKILL_STATE_UNBLOCKED:
751                 if ((sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED)) {
752                         sc->sc_flags &= ~SC_OP_RFKILL_SW_BLOCKED;
753                         if (sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED) {
754                                 DPRINTF(sc, ATH_DBG_FATAL, "Can't turn on the"
755                                         "radio as it is disabled by h/w \n");
756                                 return -EPERM;
757                         }
758                         ath_radio_enable(sc);
759                 }
760                 return 0;
761         default:
762                 return -EINVAL;
763         }
764 }
765
766 /* Init s/w rfkill */
767 static int ath_init_sw_rfkill(struct ath_softc *sc)
768 {
769         sc->rf_kill.rfkill = rfkill_allocate(wiphy_dev(sc->hw->wiphy),
770                                              RFKILL_TYPE_WLAN);
771         if (!sc->rf_kill.rfkill) {
772                 DPRINTF(sc, ATH_DBG_FATAL, "Failed to allocate rfkill\n");
773                 return -ENOMEM;
774         }
775
776         snprintf(sc->rf_kill.rfkill_name, sizeof(sc->rf_kill.rfkill_name),
777                 "ath9k-%s:rfkill", wiphy_name(sc->hw->wiphy));
778         sc->rf_kill.rfkill->name = sc->rf_kill.rfkill_name;
779         sc->rf_kill.rfkill->data = sc;
780         sc->rf_kill.rfkill->toggle_radio = ath_sw_toggle_radio;
781         sc->rf_kill.rfkill->state = RFKILL_STATE_UNBLOCKED;
782         sc->rf_kill.rfkill->user_claim_unsupported = 1;
783
784         return 0;
785 }
786
787 /* Deinitialize rfkill */
788 static void ath_deinit_rfkill(struct ath_softc *sc)
789 {
790         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
791                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
792
793         if (sc->sc_flags & SC_OP_RFKILL_REGISTERED) {
794                 rfkill_unregister(sc->rf_kill.rfkill);
795                 sc->sc_flags &= ~SC_OP_RFKILL_REGISTERED;
796                 sc->rf_kill.rfkill = NULL;
797         }
798 }
799
800 static int ath_start_rfkill_poll(struct ath_softc *sc)
801 {
802         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
803                 queue_delayed_work(sc->hw->workqueue,
804                                    &sc->rf_kill.rfkill_poll, 0);
805
806         if (!(sc->sc_flags & SC_OP_RFKILL_REGISTERED)) {
807                 if (rfkill_register(sc->rf_kill.rfkill)) {
808                         DPRINTF(sc, ATH_DBG_FATAL,
809                                 "Unable to register rfkill\n");
810                         rfkill_free(sc->rf_kill.rfkill);
811
812                         /* Deinitialize the device */
813                         ath_detach(sc);
814                         if (sc->pdev->irq)
815                                 free_irq(sc->pdev->irq, sc);
816                         pci_iounmap(sc->pdev, sc->mem);
817                         pci_release_region(sc->pdev, 0);
818                         pci_disable_device(sc->pdev);
819                         ieee80211_free_hw(sc->hw);
820                         return -EIO;
821                 } else {
822                         sc->sc_flags |= SC_OP_RFKILL_REGISTERED;
823                 }
824         }
825
826         return 0;
827 }
828 #endif /* CONFIG_RFKILL */
829
830 static void ath_detach(struct ath_softc *sc)
831 {
832         struct ieee80211_hw *hw = sc->hw;
833         int i = 0;
834
835         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach ATH hw\n", __func__);
836
837         ieee80211_unregister_hw(hw);
838
839         ath_deinit_leds(sc);
840
841 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
842         ath_deinit_rfkill(sc);
843 #endif
844         ath_rate_control_unregister();
845         ath_rate_detach(sc->sc_rc);
846
847         ath_rx_cleanup(sc);
848         ath_tx_cleanup(sc);
849
850         tasklet_kill(&sc->intr_tq);
851         tasklet_kill(&sc->bcon_tasklet);
852
853         if (!(sc->sc_flags & SC_OP_INVALID))
854                 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
855
856         /* cleanup tx queues */
857         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
858                 if (ATH_TXQ_SETUP(sc, i))
859                         ath_tx_cleanupq(sc, &sc->sc_txq[i]);
860
861         ath9k_hw_detach(sc->sc_ah);
862 }
863
864 static int ath_attach(u16 devid, struct ath_softc *sc)
865 {
866         struct ieee80211_hw *hw = sc->hw;
867         int error = 0;
868
869         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach ATH hw\n", __func__);
870
871         error = ath_init(devid, sc);
872         if (error != 0)
873                 return error;
874
875         /* get mac address from hardware and set in mac80211 */
876
877         SET_IEEE80211_PERM_ADDR(hw, sc->sc_myaddr);
878
879         hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
880                 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
881                 IEEE80211_HW_SIGNAL_DBM |
882                 IEEE80211_HW_AMPDU_AGGREGATION;
883
884         hw->wiphy->interface_modes =
885                 BIT(NL80211_IFTYPE_AP) |
886                 BIT(NL80211_IFTYPE_STATION) |
887                 BIT(NL80211_IFTYPE_ADHOC);
888
889         hw->queues = 4;
890         hw->sta_data_size = sizeof(struct ath_node);
891         hw->vif_data_size = sizeof(struct ath_vap);
892
893         /* Register rate control */
894         hw->rate_control_algorithm = "ath9k_rate_control";
895         error = ath_rate_control_register();
896         if (error != 0) {
897                 DPRINTF(sc, ATH_DBG_FATAL,
898                         "%s: Unable to register rate control "
899                         "algorithm:%d\n", __func__, error);
900                 ath_rate_control_unregister();
901                 goto bad;
902         }
903
904         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) {
905                 setup_ht_cap(&sc->sbands[IEEE80211_BAND_2GHZ].ht_cap);
906                 if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes))
907                         setup_ht_cap(&sc->sbands[IEEE80211_BAND_5GHZ].ht_cap);
908         }
909
910         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &sc->sbands[IEEE80211_BAND_2GHZ];
911         if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes))
912                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
913                         &sc->sbands[IEEE80211_BAND_5GHZ];
914
915         /* initialize tx/rx engine */
916         error = ath_tx_init(sc, ATH_TXBUF);
917         if (error != 0)
918                 goto detach;
919
920         error = ath_rx_init(sc, ATH_RXBUF);
921         if (error != 0)
922                 goto detach;
923
924 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
925         /* Initialze h/w Rfkill */
926         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
927                 INIT_DELAYED_WORK(&sc->rf_kill.rfkill_poll, ath_rfkill_poll);
928
929         /* Initialize s/w rfkill */
930         if (ath_init_sw_rfkill(sc))
931                 goto detach;
932 #endif
933
934         error = ieee80211_register_hw(hw);
935         if (error != 0) {
936                 ath_rate_control_unregister();
937                 goto bad;
938         }
939
940         /* Initialize LED control */
941         ath_init_leds(sc);
942
943         return 0;
944 detach:
945         ath_detach(sc);
946 bad:
947         return error;
948 }
949
950 static int ath9k_start(struct ieee80211_hw *hw)
951 {
952         struct ath_softc *sc = hw->priv;
953         struct ieee80211_channel *curchan = hw->conf.channel;
954         int error = 0, pos;
955
956         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Starting driver with "
957                 "initial channel: %d MHz\n", __func__, curchan->center_freq);
958
959         memset(&sc->sc_ht_info, 0, sizeof(struct ath_ht_info));
960
961         /* setup initial channel */
962
963         pos = ath_get_channel(sc, curchan);
964         if (pos == -1) {
965                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
966                 error = -EINVAL;
967                 goto exit;
968         }
969
970         sc->sc_ah->ah_channels[pos].chanmode =
971                 (curchan->band == IEEE80211_BAND_2GHZ) ? CHANNEL_G : CHANNEL_A;
972
973         error = ath_open(sc, &sc->sc_ah->ah_channels[pos]);
974         if (error) {
975                 DPRINTF(sc, ATH_DBG_FATAL,
976                         "%s: Unable to complete ath_open\n", __func__);
977                 goto exit;
978         }
979
980 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
981         error = ath_start_rfkill_poll(sc);
982 #endif
983
984 exit:
985         return error;
986 }
987
988 static int ath9k_tx(struct ieee80211_hw *hw,
989                     struct sk_buff *skb)
990 {
991         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
992         struct ath_softc *sc = hw->priv;
993         struct ath_tx_control txctl;
994         int hdrlen, padsize;
995
996         memset(&txctl, 0, sizeof(struct ath_tx_control));
997
998         /*
999          * As a temporary workaround, assign seq# here; this will likely need
1000          * to be cleaned up to work better with Beacon transmission and virtual
1001          * BSSes.
1002          */
1003         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1004                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1005                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
1006                         sc->seq_no += 0x10;
1007                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1008                 hdr->seq_ctrl |= cpu_to_le16(sc->seq_no);
1009         }
1010
1011         /* Add the padding after the header if this is not already done */
1012         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1013         if (hdrlen & 3) {
1014                 padsize = hdrlen % 4;
1015                 if (skb_headroom(skb) < padsize)
1016                         return -1;
1017                 skb_push(skb, padsize);
1018                 memmove(skb->data, skb->data + padsize, hdrlen);
1019         }
1020
1021         /* Check if a tx queue is available */
1022
1023         txctl.txq = ath_test_get_txq(sc, skb);
1024         if (!txctl.txq)
1025                 goto exit;
1026
1027         DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting packet, skb: %p\n",
1028                 __func__,
1029                 skb);
1030
1031         if (ath_tx_start(sc, skb, &txctl) != 0) {
1032                 DPRINTF(sc, ATH_DBG_XMIT, "%s: TX failed\n", __func__);
1033                 goto exit;
1034         }
1035
1036         return 0;
1037 exit:
1038         dev_kfree_skb_any(skb);
1039         return 0;
1040 }
1041
1042 static void ath9k_stop(struct ieee80211_hw *hw)
1043 {
1044         struct ath_softc *sc = hw->priv;
1045
1046         if (sc->sc_flags & SC_OP_INVALID) {
1047                 DPRINTF(sc, ATH_DBG_ANY, "%s: Device not present\n", __func__);
1048                 return;
1049         }
1050
1051         ath_stop(sc);
1052
1053         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Driver halt\n", __func__);
1054 }
1055
1056 static int ath9k_add_interface(struct ieee80211_hw *hw,
1057                                struct ieee80211_if_init_conf *conf)
1058 {
1059         struct ath_softc *sc = hw->priv;
1060         struct ath_vap *avp = (void *)conf->vif->drv_priv;
1061         int ic_opmode = 0;
1062
1063         /* Support only vap for now */
1064
1065         if (sc->sc_nvaps)
1066                 return -ENOBUFS;
1067
1068         switch (conf->type) {
1069         case NL80211_IFTYPE_STATION:
1070                 ic_opmode = ATH9K_M_STA;
1071                 break;
1072         case NL80211_IFTYPE_ADHOC:
1073                 ic_opmode = ATH9K_M_IBSS;
1074                 break;
1075         case NL80211_IFTYPE_AP:
1076                 ic_opmode = ATH9K_M_HOSTAP;
1077                 break;
1078         default:
1079                 DPRINTF(sc, ATH_DBG_FATAL,
1080                         "%s: Interface type %d not yet supported\n",
1081                         __func__, conf->type);
1082                 return -EOPNOTSUPP;
1083         }
1084
1085         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a VAP of type: %d\n",
1086                 __func__,
1087                 ic_opmode);
1088
1089         /* Set the VAP opmode */
1090         avp->av_opmode = ic_opmode;
1091         avp->av_bslot = -1;
1092
1093         if (ic_opmode == ATH9K_M_HOSTAP)
1094                 ath9k_hw_set_tsfadjust(sc->sc_ah, 1);
1095
1096         sc->sc_vaps[0] = conf->vif;
1097         sc->sc_nvaps++;
1098
1099         /* Set the device opmode */
1100         sc->sc_ah->ah_opmode = ic_opmode;
1101
1102         /* default VAP configuration */
1103         avp->av_config.av_fixed_rateset = IEEE80211_FIXED_RATE_NONE;
1104         avp->av_config.av_fixed_retryset = 0x03030303;
1105
1106         if (conf->type == NL80211_IFTYPE_AP) {
1107                 /* TODO: is this a suitable place to start ANI for AP mode? */
1108                 /* Start ANI */
1109                 mod_timer(&sc->sc_ani.timer,
1110                           jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
1111         }
1112
1113         return 0;
1114 }
1115
1116 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1117                                    struct ieee80211_if_init_conf *conf)
1118 {
1119         struct ath_softc *sc = hw->priv;
1120         struct ath_vap *avp = (void *)conf->vif->drv_priv;
1121
1122         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach VAP\n", __func__);
1123
1124 #ifdef CONFIG_SLOW_ANT_DIV
1125         ath_slow_ant_div_stop(&sc->sc_antdiv);
1126 #endif
1127         /* Stop ANI */
1128         del_timer_sync(&sc->sc_ani.timer);
1129
1130         /* Reclaim beacon resources */
1131         if (sc->sc_ah->ah_opmode == ATH9K_M_HOSTAP ||
1132             sc->sc_ah->ah_opmode == ATH9K_M_IBSS) {
1133                 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
1134                 ath_beacon_return(sc, avp);
1135         }
1136
1137         sc->sc_flags &= ~SC_OP_BEACONS;
1138
1139         sc->sc_vaps[0] = NULL;
1140         sc->sc_nvaps--;
1141 }
1142
1143 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1144 {
1145         struct ath_softc *sc = hw->priv;
1146         struct ieee80211_channel *curchan = hw->conf.channel;
1147         struct ieee80211_conf *conf = &hw->conf;
1148         int pos;
1149
1150         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
1151                 __func__,
1152                 curchan->center_freq);
1153
1154         /* Update chainmask */
1155         ath_update_chainmask(sc, conf->ht.enabled);
1156
1157         pos = ath_get_channel(sc, curchan);
1158         if (pos == -1) {
1159                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
1160                 return -EINVAL;
1161         }
1162
1163         sc->sc_ah->ah_channels[pos].chanmode =
1164                 (curchan->band == IEEE80211_BAND_2GHZ) ?
1165                 CHANNEL_G : CHANNEL_A;
1166
1167         if (sc->sc_curaid && hw->conf.ht.enabled)
1168                 sc->sc_ah->ah_channels[pos].chanmode =
1169                         ath_get_extchanmode(sc, curchan);
1170
1171         if (changed & IEEE80211_CONF_CHANGE_POWER)
1172                 sc->sc_config.txpowlimit = 2 * conf->power_level;
1173
1174         /* set h/w channel */
1175         if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
1176                 DPRINTF(sc, ATH_DBG_FATAL, "%s: Unable to set channel\n",
1177                         __func__);
1178
1179         return 0;
1180 }
1181
1182 static int ath9k_config_interface(struct ieee80211_hw *hw,
1183                                   struct ieee80211_vif *vif,
1184                                   struct ieee80211_if_conf *conf)
1185 {
1186         struct ath_softc *sc = hw->priv;
1187         struct ath_hal *ah = sc->sc_ah;
1188         struct ath_vap *avp = (void *)vif->drv_priv;
1189         u32 rfilt = 0;
1190         int error, i;
1191
1192         /* TODO: Need to decide which hw opmode to use for multi-interface
1193          * cases */
1194         if (vif->type == NL80211_IFTYPE_AP &&
1195             ah->ah_opmode != ATH9K_M_HOSTAP) {
1196                 ah->ah_opmode = ATH9K_M_HOSTAP;
1197                 ath9k_hw_setopmode(ah);
1198                 ath9k_hw_write_associd(ah, sc->sc_myaddr, 0);
1199                 /* Request full reset to get hw opmode changed properly */
1200                 sc->sc_flags |= SC_OP_FULL_RESET;
1201         }
1202
1203         if ((conf->changed & IEEE80211_IFCC_BSSID) &&
1204             !is_zero_ether_addr(conf->bssid)) {
1205                 switch (vif->type) {
1206                 case NL80211_IFTYPE_STATION:
1207                 case NL80211_IFTYPE_ADHOC:
1208                         /* Update ratectrl about the new state */
1209                         ath_rate_newstate(sc, avp);
1210
1211                         /* Set BSSID */
1212                         memcpy(sc->sc_curbssid, conf->bssid, ETH_ALEN);
1213                         sc->sc_curaid = 0;
1214                         ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
1215                                                sc->sc_curaid);
1216
1217                         /* Set aggregation protection mode parameters */
1218                         sc->sc_config.ath_aggr_prot = 0;
1219
1220                         DPRINTF(sc, ATH_DBG_CONFIG,
1221                                 "%s: RX filter 0x%x bssid %pM aid 0x%x\n",
1222                                 __func__, rfilt,
1223                                 sc->sc_curbssid, sc->sc_curaid);
1224
1225                         /* need to reconfigure the beacon */
1226                         sc->sc_flags &= ~SC_OP_BEACONS ;
1227
1228                         break;
1229                 default:
1230                         break;
1231                 }
1232         }
1233
1234         if ((conf->changed & IEEE80211_IFCC_BEACON) &&
1235             ((vif->type == NL80211_IFTYPE_ADHOC) ||
1236              (vif->type == NL80211_IFTYPE_AP))) {
1237                 /*
1238                  * Allocate and setup the beacon frame.
1239                  *
1240                  * Stop any previous beacon DMA.  This may be
1241                  * necessary, for example, when an ibss merge
1242                  * causes reconfiguration; we may be called
1243                  * with beacon transmission active.
1244                  */
1245                 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
1246
1247                 error = ath_beacon_alloc(sc, 0);
1248                 if (error != 0)
1249                         return error;
1250
1251                 ath_beacon_sync(sc, 0);
1252         }
1253
1254         /* Check for WLAN_CAPABILITY_PRIVACY ? */
1255         if ((avp->av_opmode != ATH9K_M_STA)) {
1256                 for (i = 0; i < IEEE80211_WEP_NKID; i++)
1257                         if (ath9k_hw_keyisvalid(sc->sc_ah, (u16)i))
1258                                 ath9k_hw_keysetmac(sc->sc_ah,
1259                                                    (u16)i,
1260                                                    sc->sc_curbssid);
1261         }
1262
1263         /* Only legacy IBSS for now */
1264         if (vif->type == NL80211_IFTYPE_ADHOC)
1265                 ath_update_chainmask(sc, 0);
1266
1267         return 0;
1268 }
1269
1270 #define SUPPORTED_FILTERS                       \
1271         (FIF_PROMISC_IN_BSS |                   \
1272         FIF_ALLMULTI |                          \
1273         FIF_CONTROL |                           \
1274         FIF_OTHER_BSS |                         \
1275         FIF_BCN_PRBRESP_PROMISC |               \
1276         FIF_FCSFAIL)
1277
1278 /* FIXME: sc->sc_full_reset ? */
1279 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1280                                    unsigned int changed_flags,
1281                                    unsigned int *total_flags,
1282                                    int mc_count,
1283                                    struct dev_mc_list *mclist)
1284 {
1285         struct ath_softc *sc = hw->priv;
1286         u32 rfilt;
1287
1288         changed_flags &= SUPPORTED_FILTERS;
1289         *total_flags &= SUPPORTED_FILTERS;
1290
1291         sc->rx_filter = *total_flags;
1292         rfilt = ath_calcrxfilter(sc);
1293         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1294
1295         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1296                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1297                         ath9k_hw_write_associd(sc->sc_ah, ath_bcast_mac, 0);
1298         }
1299
1300         DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set HW RX filter: 0x%x\n",
1301                 __func__, sc->rx_filter);
1302 }
1303
1304 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1305                              struct ieee80211_vif *vif,
1306                              enum sta_notify_cmd cmd,
1307                              struct ieee80211_sta *sta)
1308 {
1309         struct ath_softc *sc = hw->priv;
1310
1311         switch (cmd) {
1312         case STA_NOTIFY_ADD:
1313                 ath_node_attach(sc, sta);
1314                 break;
1315         case STA_NOTIFY_REMOVE:
1316                 ath_node_detach(sc, sta);
1317                 break;
1318         default:
1319                 break;
1320         }
1321 }
1322
1323 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1324                          u16 queue,
1325                          const struct ieee80211_tx_queue_params *params)
1326 {
1327         struct ath_softc *sc = hw->priv;
1328         struct ath9k_tx_queue_info qi;
1329         int ret = 0, qnum;
1330
1331         if (queue >= WME_NUM_AC)
1332                 return 0;
1333
1334         qi.tqi_aifs = params->aifs;
1335         qi.tqi_cwmin = params->cw_min;
1336         qi.tqi_cwmax = params->cw_max;
1337         qi.tqi_burstTime = params->txop;
1338         qnum = ath_get_hal_qnum(queue, sc);
1339
1340         DPRINTF(sc, ATH_DBG_CONFIG,
1341                 "%s: Configure tx [queue/halq] [%d/%d],  "
1342                 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1343                 __func__,
1344                 queue,
1345                 qnum,
1346                 params->aifs,
1347                 params->cw_min,
1348                 params->cw_max,
1349                 params->txop);
1350
1351         ret = ath_txq_update(sc, qnum, &qi);
1352         if (ret)
1353                 DPRINTF(sc, ATH_DBG_FATAL,
1354                         "%s: TXQ Update failed\n", __func__);
1355
1356         return ret;
1357 }
1358
1359 static int ath9k_set_key(struct ieee80211_hw *hw,
1360                          enum set_key_cmd cmd,
1361                          const u8 *local_addr,
1362                          const u8 *addr,
1363                          struct ieee80211_key_conf *key)
1364 {
1365         struct ath_softc *sc = hw->priv;
1366         int ret = 0;
1367
1368         DPRINTF(sc, ATH_DBG_KEYCACHE, " %s: Set HW Key\n", __func__);
1369
1370         switch (cmd) {
1371         case SET_KEY:
1372                 ret = ath_key_config(sc, addr, key);
1373                 if (!ret) {
1374                         set_bit(key->keyidx, sc->sc_keymap);
1375                         key->hw_key_idx = key->keyidx;
1376                         /* push IV and Michael MIC generation to stack */
1377                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1378                         if (key->alg == ALG_TKIP)
1379                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1380                 }
1381                 break;
1382         case DISABLE_KEY:
1383                 ath_key_delete(sc, key);
1384                 clear_bit(key->keyidx, sc->sc_keymap);
1385                 break;
1386         default:
1387                 ret = -EINVAL;
1388         }
1389
1390         return ret;
1391 }
1392
1393 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1394                                    struct ieee80211_vif *vif,
1395                                    struct ieee80211_bss_conf *bss_conf,
1396                                    u32 changed)
1397 {
1398         struct ath_softc *sc = hw->priv;
1399
1400         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1401                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed PREAMBLE %d\n",
1402                         __func__,
1403                         bss_conf->use_short_preamble);
1404                 if (bss_conf->use_short_preamble)
1405                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
1406                 else
1407                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
1408         }
1409
1410         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1411                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed CTS PROT %d\n",
1412                         __func__,
1413                         bss_conf->use_cts_prot);
1414                 if (bss_conf->use_cts_prot &&
1415                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
1416                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
1417                 else
1418                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
1419         }
1420
1421         if (changed & BSS_CHANGED_HT) {
1422                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed HT\n",
1423                         __func__);
1424                 ath9k_ht_conf(sc, bss_conf);
1425         }
1426
1427         if (changed & BSS_CHANGED_ASSOC) {
1428                 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed ASSOC %d\n",
1429                         __func__,
1430                         bss_conf->assoc);
1431                 ath9k_bss_assoc_info(sc, vif, bss_conf);
1432         }
1433 }
1434
1435 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
1436 {
1437         u64 tsf;
1438         struct ath_softc *sc = hw->priv;
1439         struct ath_hal *ah = sc->sc_ah;
1440
1441         tsf = ath9k_hw_gettsf64(ah);
1442
1443         return tsf;
1444 }
1445
1446 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
1447 {
1448         struct ath_softc *sc = hw->priv;
1449         struct ath_hal *ah = sc->sc_ah;
1450
1451         ath9k_hw_reset_tsf(ah);
1452 }
1453
1454 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1455                        enum ieee80211_ampdu_mlme_action action,
1456                        struct ieee80211_sta *sta,
1457                        u16 tid, u16 *ssn)
1458 {
1459         struct ath_softc *sc = hw->priv;
1460         int ret = 0;
1461
1462         switch (action) {
1463         case IEEE80211_AMPDU_RX_START:
1464                 if (!(sc->sc_flags & SC_OP_RXAGGR))
1465                         ret = -ENOTSUPP;
1466                 break;
1467         case IEEE80211_AMPDU_RX_STOP:
1468                 break;
1469         case IEEE80211_AMPDU_TX_START:
1470                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
1471                 if (ret < 0)
1472                         DPRINTF(sc, ATH_DBG_FATAL,
1473                                 "%s: Unable to start TX aggregation\n",
1474                                 __func__);
1475                 else
1476                         ieee80211_start_tx_ba_cb_irqsafe(hw, sta->addr, tid);
1477                 break;
1478         case IEEE80211_AMPDU_TX_STOP:
1479                 ret = ath_tx_aggr_stop(sc, sta, tid);
1480                 if (ret < 0)
1481                         DPRINTF(sc, ATH_DBG_FATAL,
1482                                 "%s: Unable to stop TX aggregation\n",
1483                                 __func__);
1484
1485                 ieee80211_stop_tx_ba_cb_irqsafe(hw, sta->addr, tid);
1486                 break;
1487         case IEEE80211_AMPDU_TX_RESUME:
1488                 ath_tx_aggr_resume(sc, sta, tid);
1489                 break;
1490         default:
1491                 DPRINTF(sc, ATH_DBG_FATAL,
1492                         "%s: Unknown AMPDU action\n", __func__);
1493         }
1494
1495         return ret;
1496 }
1497
1498 static int ath9k_no_fragmentation(struct ieee80211_hw *hw, u32 value)
1499 {
1500         return -EOPNOTSUPP;
1501 }
1502
1503 static struct ieee80211_ops ath9k_ops = {
1504         .tx                 = ath9k_tx,
1505         .start              = ath9k_start,
1506         .stop               = ath9k_stop,
1507         .add_interface      = ath9k_add_interface,
1508         .remove_interface   = ath9k_remove_interface,
1509         .config             = ath9k_config,
1510         .config_interface   = ath9k_config_interface,
1511         .configure_filter   = ath9k_configure_filter,
1512         .sta_notify         = ath9k_sta_notify,
1513         .conf_tx            = ath9k_conf_tx,
1514         .bss_info_changed   = ath9k_bss_info_changed,
1515         .set_key            = ath9k_set_key,
1516         .get_tsf            = ath9k_get_tsf,
1517         .reset_tsf          = ath9k_reset_tsf,
1518         .ampdu_action       = ath9k_ampdu_action,
1519         .set_frag_threshold = ath9k_no_fragmentation,
1520 };
1521
1522 static struct {
1523         u32 version;
1524         const char * name;
1525 } ath_mac_bb_names[] = {
1526         { AR_SREV_VERSION_5416_PCI,     "5416" },
1527         { AR_SREV_VERSION_5416_PCIE,    "5418" },
1528         { AR_SREV_VERSION_9100,         "9100" },
1529         { AR_SREV_VERSION_9160,         "9160" },
1530         { AR_SREV_VERSION_9280,         "9280" },
1531         { AR_SREV_VERSION_9285,         "9285" }
1532 };
1533
1534 static struct {
1535         u16 version;
1536         const char * name;
1537 } ath_rf_names[] = {
1538         { 0,                            "5133" },
1539         { AR_RAD5133_SREV_MAJOR,        "5133" },
1540         { AR_RAD5122_SREV_MAJOR,        "5122" },
1541         { AR_RAD2133_SREV_MAJOR,        "2133" },
1542         { AR_RAD2122_SREV_MAJOR,        "2122" }
1543 };
1544
1545 /*
1546  * Return the MAC/BB name. "????" is returned if the MAC/BB is unknown.
1547  */
1548
1549 static const char *
1550 ath_mac_bb_name(u32 mac_bb_version)
1551 {
1552         int i;
1553
1554         for (i=0; i<ARRAY_SIZE(ath_mac_bb_names); i++) {
1555                 if (ath_mac_bb_names[i].version == mac_bb_version) {
1556                         return ath_mac_bb_names[i].name;
1557                 }
1558         }
1559
1560         return "????";
1561 }
1562
1563 /*
1564  * Return the RF name. "????" is returned if the RF is unknown.
1565  */
1566
1567 static const char *
1568 ath_rf_name(u16 rf_version)
1569 {
1570         int i;
1571
1572         for (i=0; i<ARRAY_SIZE(ath_rf_names); i++) {
1573                 if (ath_rf_names[i].version == rf_version) {
1574                         return ath_rf_names[i].name;
1575                 }
1576         }
1577
1578         return "????";
1579 }
1580
1581 static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1582 {
1583         void __iomem *mem;
1584         struct ath_softc *sc;
1585         struct ieee80211_hw *hw;
1586         u8 csz;
1587         u32 val;
1588         int ret = 0;
1589         struct ath_hal *ah;
1590
1591         if (pci_enable_device(pdev))
1592                 return -EIO;
1593
1594         /* XXX 32-bit addressing only */
1595         if (pci_set_dma_mask(pdev, 0xffffffff)) {
1596                 printk(KERN_ERR "ath_pci: 32-bit DMA not available\n");
1597                 ret = -ENODEV;
1598                 goto bad;
1599         }
1600
1601         /*
1602          * Cache line size is used to size and align various
1603          * structures used to communicate with the hardware.
1604          */
1605         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
1606         if (csz == 0) {
1607                 /*
1608                  * Linux 2.4.18 (at least) writes the cache line size
1609                  * register as a 16-bit wide register which is wrong.
1610                  * We must have this setup properly for rx buffer
1611                  * DMA to work so force a reasonable value here if it
1612                  * comes up zero.
1613                  */
1614                 csz = L1_CACHE_BYTES / sizeof(u32);
1615                 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
1616         }
1617         /*
1618          * The default setting of latency timer yields poor results,
1619          * set it to the value used by other systems. It may be worth
1620          * tweaking this setting more.
1621          */
1622         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
1623
1624         pci_set_master(pdev);
1625
1626         /*
1627          * Disable the RETRY_TIMEOUT register (0x41) to keep
1628          * PCI Tx retries from interfering with C3 CPU state.
1629          */
1630         pci_read_config_dword(pdev, 0x40, &val);
1631         if ((val & 0x0000ff00) != 0)
1632                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1633
1634         ret = pci_request_region(pdev, 0, "ath9k");
1635         if (ret) {
1636                 dev_err(&pdev->dev, "PCI memory region reserve error\n");
1637                 ret = -ENODEV;
1638                 goto bad;
1639         }
1640
1641         mem = pci_iomap(pdev, 0, 0);
1642         if (!mem) {
1643                 printk(KERN_ERR "PCI memory map error\n") ;
1644                 ret = -EIO;
1645                 goto bad1;
1646         }
1647
1648         hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
1649         if (hw == NULL) {
1650                 printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n");
1651                 goto bad2;
1652         }
1653
1654         SET_IEEE80211_DEV(hw, &pdev->dev);
1655         pci_set_drvdata(pdev, hw);
1656
1657         sc = hw->priv;
1658         sc->hw = hw;
1659         sc->pdev = pdev;
1660         sc->mem = mem;
1661
1662         if (ath_attach(id->device, sc) != 0) {
1663                 ret = -ENODEV;
1664                 goto bad3;
1665         }
1666
1667         /* setup interrupt service routine */
1668
1669         if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) {
1670                 printk(KERN_ERR "%s: request_irq failed\n",
1671                         wiphy_name(hw->wiphy));
1672                 ret = -EIO;
1673                 goto bad4;
1674         }
1675
1676         ah = sc->sc_ah;
1677         printk(KERN_INFO
1678                "%s: Atheros AR%s MAC/BB Rev:%x "
1679                "AR%s RF Rev:%x: mem=0x%lx, irq=%d\n",
1680                wiphy_name(hw->wiphy),
1681                ath_mac_bb_name(ah->ah_macVersion),
1682                ah->ah_macRev,
1683                ath_rf_name((ah->ah_analog5GhzRev & AR_RADIO_SREV_MAJOR)),
1684                ah->ah_phyRev,
1685                (unsigned long)mem, pdev->irq);
1686
1687         return 0;
1688 bad4:
1689         ath_detach(sc);
1690 bad3:
1691         ieee80211_free_hw(hw);
1692 bad2:
1693         pci_iounmap(pdev, mem);
1694 bad1:
1695         pci_release_region(pdev, 0);
1696 bad:
1697         pci_disable_device(pdev);
1698         return ret;
1699 }
1700
1701 static void ath_pci_remove(struct pci_dev *pdev)
1702 {
1703         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1704         struct ath_softc *sc = hw->priv;
1705
1706         ath_detach(sc);
1707         if (pdev->irq)
1708                 free_irq(pdev->irq, sc);
1709         pci_iounmap(pdev, sc->mem);
1710         pci_release_region(pdev, 0);
1711         pci_disable_device(pdev);
1712         ieee80211_free_hw(hw);
1713 }
1714
1715 #ifdef CONFIG_PM
1716
1717 static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
1718 {
1719         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1720         struct ath_softc *sc = hw->priv;
1721
1722         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
1723
1724 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
1725         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1726                 cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
1727 #endif
1728
1729         pci_save_state(pdev);
1730         pci_disable_device(pdev);
1731         pci_set_power_state(pdev, 3);
1732
1733         return 0;
1734 }
1735
1736 static int ath_pci_resume(struct pci_dev *pdev)
1737 {
1738         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1739         struct ath_softc *sc = hw->priv;
1740         u32 val;
1741         int err;
1742
1743         err = pci_enable_device(pdev);
1744         if (err)
1745                 return err;
1746         pci_restore_state(pdev);
1747         /*
1748          * Suspend/Resume resets the PCI configuration space, so we have to
1749          * re-disable the RETRY_TIMEOUT register (0x41) to keep
1750          * PCI Tx retries from interfering with C3 CPU state
1751          */
1752         pci_read_config_dword(pdev, 0x40, &val);
1753         if ((val & 0x0000ff00) != 0)
1754                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1755
1756         /* Enable LED */
1757         ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
1758                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1759         ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
1760
1761 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
1762         /*
1763          * check the h/w rfkill state on resume
1764          * and start the rfkill poll timer
1765          */
1766         if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
1767                 queue_delayed_work(sc->hw->workqueue,
1768                                    &sc->rf_kill.rfkill_poll, 0);
1769 #endif
1770
1771         return 0;
1772 }
1773
1774 #endif /* CONFIG_PM */
1775
1776 MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
1777
1778 static struct pci_driver ath_pci_driver = {
1779         .name       = "ath9k",
1780         .id_table   = ath_pci_id_table,
1781         .probe      = ath_pci_probe,
1782         .remove     = ath_pci_remove,
1783 #ifdef CONFIG_PM
1784         .suspend    = ath_pci_suspend,
1785         .resume     = ath_pci_resume,
1786 #endif /* CONFIG_PM */
1787 };
1788
1789 static int __init init_ath_pci(void)
1790 {
1791         printk(KERN_INFO "%s: %s\n", dev_info, ATH_PCI_VERSION);
1792
1793         if (pci_register_driver(&ath_pci_driver) < 0) {
1794                 printk(KERN_ERR
1795                         "ath_pci: No devices found, driver not installed.\n");
1796                 pci_unregister_driver(&ath_pci_driver);
1797                 return -ENODEV;
1798         }
1799
1800         return 0;
1801 }
1802 module_init(init_ath_pci);
1803
1804 static void __exit exit_ath_pci(void)
1805 {
1806         pci_unregister_driver(&ath_pci_driver);
1807         printk(KERN_INFO "%s: driver unloaded\n", dev_info);
1808 }
1809 module_exit(exit_ath_pci);