2 * Atheros CARL9170 driver
4 * mac80211 interaction code
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, see
21 * http://www.gnu.org/licenses/.
23 * This file incorporates work covered by the following copyright and
25 * Copyright (c) 2007-2008 Atheros Communications, Inc.
27 * Permission to use, copy, modify, and/or distribute this software for any
28 * purpose with or without fee is hereby granted, provided that the above
29 * copyright notice and this permission notice appear in all copies.
31 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
32 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
33 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
34 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
35 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
36 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
37 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
40 #include <linux/init.h>
41 #include <linux/slab.h>
42 #include <linux/module.h>
43 #include <linux/etherdevice.h>
44 #include <linux/random.h>
45 #include <net/mac80211.h>
46 #include <net/cfg80211.h>
51 static int modparam_nohwcrypt;
52 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
53 MODULE_PARM_DESC(nohwcrypt, "Disable hardware crypto offload.");
56 module_param_named(noht, modparam_noht, int, S_IRUGO);
57 MODULE_PARM_DESC(noht, "Disable MPDU aggregation.");
59 #define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \
60 .bitrate = (_bitrate), \
62 .hw_value = (_hw_rate) | (_txpidx) << 4, \
65 struct ieee80211_rate __carl9170_ratetable[] = {
67 RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE),
68 RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE),
69 RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE),
81 #define carl9170_g_ratetable (__carl9170_ratetable + 0)
82 #define carl9170_g_ratetable_size 12
83 #define carl9170_a_ratetable (__carl9170_ratetable + 4)
84 #define carl9170_a_ratetable_size 8
87 * NB: The hw_value is used as an index into the carl9170_phy_freq_params
88 * array in phy.c so that we don't have to do frequency lookups!
90 #define CHAN(_freq, _idx) { \
91 .center_freq = (_freq), \
93 .max_power = 18, /* XXX */ \
96 static struct ieee80211_channel carl9170_2ghz_chantable[] = {
113 static struct ieee80211_channel carl9170_5ghz_chantable[] = {
152 #define CARL9170_HT_CAP \
154 .ht_supported = true, \
155 .cap = IEEE80211_HT_CAP_MAX_AMSDU | \
156 IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \
157 IEEE80211_HT_CAP_SGI_40 | \
158 IEEE80211_HT_CAP_DSSSCCK40 | \
159 IEEE80211_HT_CAP_SM_PS, \
160 .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K, \
161 .ampdu_density = IEEE80211_HT_MPDU_DENSITY_8, \
163 .rx_mask = { 0xff, 0xff, 0, 0, 0x1, 0, 0, 0, 0, 0, }, \
164 .rx_highest = cpu_to_le16(300), \
165 .tx_params = IEEE80211_HT_MCS_TX_DEFINED, \
169 static struct ieee80211_supported_band carl9170_band_2GHz = {
170 .channels = carl9170_2ghz_chantable,
171 .n_channels = ARRAY_SIZE(carl9170_2ghz_chantable),
172 .bitrates = carl9170_g_ratetable,
173 .n_bitrates = carl9170_g_ratetable_size,
174 .ht_cap = CARL9170_HT_CAP,
177 static struct ieee80211_supported_band carl9170_band_5GHz = {
178 .channels = carl9170_5ghz_chantable,
179 .n_channels = ARRAY_SIZE(carl9170_5ghz_chantable),
180 .bitrates = carl9170_a_ratetable,
181 .n_bitrates = carl9170_a_ratetable_size,
182 .ht_cap = CARL9170_HT_CAP,
185 static void carl9170_ampdu_gc(struct ar9170 *ar)
187 struct carl9170_sta_tid *tid_info;
191 list_for_each_entry_rcu(tid_info, &ar->tx_ampdu_list, list) {
192 spin_lock_bh(&ar->tx_ampdu_list_lock);
193 if (tid_info->state == CARL9170_TID_STATE_SHUTDOWN) {
194 tid_info->state = CARL9170_TID_STATE_KILLED;
195 list_del_rcu(&tid_info->list);
196 ar->tx_ampdu_list_len--;
197 list_add_tail(&tid_info->tmp_list, &tid_gc);
199 spin_unlock_bh(&ar->tx_ampdu_list_lock);
202 rcu_assign_pointer(ar->tx_ampdu_iter, tid_info);
207 while (!list_empty(&tid_gc)) {
209 tid_info = list_first_entry(&tid_gc, struct carl9170_sta_tid,
212 while ((skb = __skb_dequeue(&tid_info->queue)))
213 carl9170_tx_status(ar, skb, false);
215 list_del_init(&tid_info->tmp_list);
220 static void carl9170_flush(struct ar9170 *ar, bool drop_queued)
226 * We can only drop frames which have not been uploaded
230 for (i = 0; i < ar->hw->queues; i++) {
233 while ((skb = skb_dequeue(&ar->tx_pending[i]))) {
234 struct ieee80211_tx_info *info;
236 info = IEEE80211_SKB_CB(skb);
237 if (info->flags & IEEE80211_TX_CTL_AMPDU)
238 atomic_dec(&ar->tx_ampdu_upload);
240 carl9170_tx_status(ar, skb, false);
245 /* Wait for all other outstanding frames to timeout. */
246 if (atomic_read(&ar->tx_total_queued))
247 WARN_ON(wait_for_completion_timeout(&ar->tx_flush, HZ) == 0);
250 static void carl9170_flush_ba(struct ar9170 *ar)
252 struct sk_buff_head free;
253 struct carl9170_sta_tid *tid_info;
256 __skb_queue_head_init(&free);
259 spin_lock_bh(&ar->tx_ampdu_list_lock);
260 list_for_each_entry_rcu(tid_info, &ar->tx_ampdu_list, list) {
261 if (tid_info->state > CARL9170_TID_STATE_SUSPEND) {
262 tid_info->state = CARL9170_TID_STATE_SUSPEND;
264 spin_lock(&tid_info->lock);
265 while ((skb = __skb_dequeue(&tid_info->queue)))
266 __skb_queue_tail(&free, skb);
267 spin_unlock(&tid_info->lock);
270 spin_unlock_bh(&ar->tx_ampdu_list_lock);
273 while ((skb = __skb_dequeue(&free)))
274 carl9170_tx_status(ar, skb, false);
277 static void carl9170_zap_queues(struct ar9170 *ar)
279 struct carl9170_vif_info *cvif;
282 carl9170_ampdu_gc(ar);
284 carl9170_flush_ba(ar);
285 carl9170_flush(ar, true);
287 for (i = 0; i < ar->hw->queues; i++) {
288 spin_lock_bh(&ar->tx_status[i].lock);
289 while (!skb_queue_empty(&ar->tx_status[i])) {
292 skb = skb_peek(&ar->tx_status[i]);
293 carl9170_tx_get_skb(skb);
294 spin_unlock_bh(&ar->tx_status[i].lock);
295 carl9170_tx_drop(ar, skb);
296 spin_lock_bh(&ar->tx_status[i].lock);
297 carl9170_tx_put_skb(skb);
299 spin_unlock_bh(&ar->tx_status[i].lock);
302 BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_SOFT < 1);
303 BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_HARD < CARL9170_NUM_TX_LIMIT_SOFT);
304 BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_HARD >= CARL9170_BAW_BITS);
306 /* reinitialize queues statistics */
307 memset(&ar->tx_stats, 0, sizeof(ar->tx_stats));
308 for (i = 0; i < ar->hw->queues; i++)
309 ar->tx_stats[i].limit = CARL9170_NUM_TX_LIMIT_HARD;
311 for (i = 0; i < DIV_ROUND_UP(ar->fw.mem_blocks, BITS_PER_LONG); i++)
312 ar->mem_bitmap[i] = 0;
315 list_for_each_entry_rcu(cvif, &ar->vif_list, list) {
316 spin_lock_bh(&ar->beacon_lock);
317 dev_kfree_skb_any(cvif->beacon);
319 spin_unlock_bh(&ar->beacon_lock);
323 atomic_set(&ar->tx_ampdu_upload, 0);
324 atomic_set(&ar->tx_ampdu_scheduler, 0);
325 atomic_set(&ar->tx_total_pending, 0);
326 atomic_set(&ar->tx_total_queued, 0);
327 atomic_set(&ar->mem_free_blocks, ar->fw.mem_blocks);
330 #define CARL9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \
332 queue.aifs = ai_fs; \
333 queue.cw_min = cwmin; \
334 queue.cw_max = cwmax; \
335 queue.txop = _txop; \
338 static int carl9170_op_start(struct ieee80211_hw *hw)
340 struct ar9170 *ar = hw->priv;
343 mutex_lock(&ar->mutex);
345 carl9170_zap_queues(ar);
347 /* reset QoS defaults */
348 CARL9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT */
349 CARL9170_FILL_QUEUE(ar->edcf[1], 2, 7, 15, 94); /* VIDEO */
350 CARL9170_FILL_QUEUE(ar->edcf[2], 2, 3, 7, 47); /* VOICE */
351 CARL9170_FILL_QUEUE(ar->edcf[3], 7, 15, 1023, 0); /* BACKGROUND */
352 CARL9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */
354 ar->current_factor = ar->current_density = -1;
355 /* "The first key is unique." */
357 ar->filter_state = 0;
358 ar->ps.last_action = jiffies;
359 ar->ps.last_slept = jiffies;
360 ar->erp_mode = CARL9170_ERP_AUTO;
361 ar->rx_software_decryption = false;
362 ar->disable_offload = false;
364 for (i = 0; i < ar->hw->queues; i++) {
365 ar->queue_stop_timeout[i] = jiffies;
366 ar->max_queue_stop_timeout[i] = 0;
369 atomic_set(&ar->mem_allocs, 0);
371 err = carl9170_usb_open(ar);
375 err = carl9170_init_mac(ar);
379 err = carl9170_set_qos(ar);
383 if (ar->fw.rx_filter) {
384 err = carl9170_rx_filter(ar, CARL9170_RX_FILTER_OTHER_RA |
385 CARL9170_RX_FILTER_CTL_OTHER | CARL9170_RX_FILTER_BAD);
390 err = carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER,
391 AR9170_DMA_TRIGGER_RXQ);
395 /* Clear key-cache */
396 for (i = 0; i < AR9170_CAM_MAX_USER + 4; i++) {
397 err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE,
402 err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE,
407 if (i < AR9170_CAM_MAX_USER) {
408 err = carl9170_disable_key(ar, i);
414 carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STARTED);
416 ieee80211_wake_queues(ar->hw);
420 mutex_unlock(&ar->mutex);
424 static void carl9170_cancel_worker(struct ar9170 *ar)
426 cancel_delayed_work_sync(&ar->tx_janitor);
427 #ifdef CONFIG_CARL9170_LEDS
428 cancel_delayed_work_sync(&ar->led_work);
429 #endif /* CONFIG_CARL9170_LEDS */
430 cancel_work_sync(&ar->ps_work);
431 cancel_work_sync(&ar->ampdu_work);
434 static void carl9170_op_stop(struct ieee80211_hw *hw)
436 struct ar9170 *ar = hw->priv;
438 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
440 ieee80211_stop_queues(ar->hw);
442 mutex_lock(&ar->mutex);
443 if (IS_ACCEPTING_CMD(ar)) {
444 rcu_assign_pointer(ar->beacon_iter, NULL);
446 carl9170_led_set_state(ar, 0);
449 carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, 0);
450 carl9170_usb_stop(ar);
453 carl9170_zap_queues(ar);
454 mutex_unlock(&ar->mutex);
456 carl9170_cancel_worker(ar);
459 static void carl9170_restart_work(struct work_struct *work)
461 struct ar9170 *ar = container_of(work, struct ar9170,
466 ar->filter_state = 0;
467 carl9170_cancel_worker(ar);
469 mutex_lock(&ar->mutex);
470 err = carl9170_usb_restart(ar);
471 if (net_ratelimit()) {
473 dev_err(&ar->udev->dev, "Failed to restart device "
476 dev_info(&ar->udev->dev, "device restarted "
481 carl9170_zap_queues(ar);
482 mutex_unlock(&ar->mutex);
484 ar->restart_counter++;
485 atomic_set(&ar->pending_restarts, 0);
487 ieee80211_restart_hw(ar->hw);
490 * The reset was unsuccessful and the device seems to
491 * be dead. But there's still one option: a low-level
492 * usb subsystem reset...
495 carl9170_usb_reset(ar);
499 void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r)
501 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
504 * Sometimes, an error can trigger several different reset events.
505 * By ignoring these *surplus* reset events, the device won't be
506 * killed again, right after it has recovered.
508 if (atomic_inc_return(&ar->pending_restarts) > 1) {
509 dev_dbg(&ar->udev->dev, "ignoring restart (%d)\n", r);
513 ieee80211_stop_queues(ar->hw);
515 dev_err(&ar->udev->dev, "restart device (%d)\n", r);
517 if (!WARN_ON(r == CARL9170_RR_NO_REASON) ||
518 !WARN_ON(r >= __CARL9170_RR_LAST))
524 if (IS_ACCEPTING_CMD(ar) && !ar->needs_full_reset)
525 ieee80211_queue_work(ar->hw, &ar->restart_work);
527 carl9170_usb_reset(ar);
530 * At this point, the device instance might have vanished/disabled.
531 * So, don't put any code which access the ar9170 struct
532 * without proper protection.
536 static int carl9170_init_interface(struct ar9170 *ar,
537 struct ieee80211_vif *vif)
539 struct ath_common *common = &ar->common;
543 WARN_ON_ONCE(IS_STARTED(ar));
547 memcpy(common->macaddr, vif->addr, ETH_ALEN);
549 if (modparam_nohwcrypt ||
550 ((vif->type != NL80211_IFTYPE_STATION) &&
551 (vif->type != NL80211_IFTYPE_AP))) {
552 ar->rx_software_decryption = true;
553 ar->disable_offload = true;
556 err = carl9170_set_operating_mode(ar);
560 static int carl9170_op_add_interface(struct ieee80211_hw *hw,
561 struct ieee80211_vif *vif)
563 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
564 struct ieee80211_vif *main_vif;
565 struct ar9170 *ar = hw->priv;
566 int vif_id = -1, err = 0;
568 mutex_lock(&ar->mutex);
570 if (vif_priv->active) {
572 * Skip the interface structure initialization,
573 * if the vif survived the _restart call.
575 vif_id = vif_priv->id;
576 vif_priv->enable_beacon = false;
578 spin_lock_bh(&ar->beacon_lock);
579 dev_kfree_skb_any(vif_priv->beacon);
580 vif_priv->beacon = NULL;
581 spin_unlock_bh(&ar->beacon_lock);
586 main_vif = carl9170_get_main_vif(ar);
589 switch (main_vif->type) {
590 case NL80211_IFTYPE_STATION:
591 if (vif->type == NL80211_IFTYPE_STATION)
599 case NL80211_IFTYPE_AP:
600 if ((vif->type == NL80211_IFTYPE_STATION) ||
601 (vif->type == NL80211_IFTYPE_WDS) ||
602 (vif->type == NL80211_IFTYPE_AP))
615 vif_id = bitmap_find_free_region(&ar->vif_bitmap, ar->fw.vif_num, 0);
624 BUG_ON(ar->vif_priv[vif_id].id != vif_id);
626 vif_priv->active = true;
627 vif_priv->id = vif_id;
628 vif_priv->enable_beacon = false;
630 list_add_tail_rcu(&vif_priv->list, &ar->vif_list);
631 rcu_assign_pointer(ar->vif_priv[vif_id].vif, vif);
634 if (carl9170_get_main_vif(ar) == vif) {
635 rcu_assign_pointer(ar->beacon_iter, vif_priv);
638 err = carl9170_init_interface(ar, vif);
643 err = carl9170_mod_virtual_mac(ar, vif_id, vif->addr);
650 if (err && (vif_id >= 0)) {
651 vif_priv->active = false;
652 bitmap_release_region(&ar->vif_bitmap, vif_id, 0);
654 rcu_assign_pointer(ar->vif_priv[vif_id].vif, NULL);
655 list_del_rcu(&vif_priv->list);
656 mutex_unlock(&ar->mutex);
660 ar->ps.off_override |= PS_OFF_VIF;
662 mutex_unlock(&ar->mutex);
668 static void carl9170_op_remove_interface(struct ieee80211_hw *hw,
669 struct ieee80211_vif *vif)
671 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
672 struct ieee80211_vif *main_vif;
673 struct ar9170 *ar = hw->priv;
676 mutex_lock(&ar->mutex);
678 if (WARN_ON_ONCE(!vif_priv->active))
684 main_vif = carl9170_get_main_vif(ar);
688 vif_priv->active = false;
689 WARN_ON(vif_priv->enable_beacon);
690 vif_priv->enable_beacon = false;
691 list_del_rcu(&vif_priv->list);
692 rcu_assign_pointer(ar->vif_priv[id].vif, NULL);
694 if (vif == main_vif) {
698 WARN_ON(carl9170_init_interface(ar,
699 carl9170_get_main_vif(ar)));
701 carl9170_set_operating_mode(ar);
706 WARN_ON(carl9170_mod_virtual_mac(ar, id, NULL));
709 carl9170_update_beacon(ar, false);
710 carl9170_flush_cab(ar, id);
712 spin_lock_bh(&ar->beacon_lock);
713 dev_kfree_skb_any(vif_priv->beacon);
714 vif_priv->beacon = NULL;
715 spin_unlock_bh(&ar->beacon_lock);
717 bitmap_release_region(&ar->vif_bitmap, id, 0);
719 carl9170_set_beacon_timers(ar);
722 ar->ps.off_override &= ~PS_OFF_VIF;
725 mutex_unlock(&ar->mutex);
730 void carl9170_ps_check(struct ar9170 *ar)
732 ieee80211_queue_work(ar->hw, &ar->ps_work);
735 /* caller must hold ar->mutex */
736 static int carl9170_ps_update(struct ar9170 *ar)
741 if (!ar->ps.off_override)
742 ps = (ar->hw->conf.flags & IEEE80211_CONF_PS);
744 if (ps != ar->ps.state) {
745 err = carl9170_powersave(ar, ps);
749 if (ar->ps.state && !ps) {
750 ar->ps.sleep_ms = jiffies_to_msecs(jiffies -
755 ar->ps.last_slept = jiffies;
757 ar->ps.last_action = jiffies;
764 static void carl9170_ps_work(struct work_struct *work)
766 struct ar9170 *ar = container_of(work, struct ar9170,
768 mutex_lock(&ar->mutex);
770 WARN_ON_ONCE(carl9170_ps_update(ar) != 0);
771 mutex_unlock(&ar->mutex);
775 static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed)
777 struct ar9170 *ar = hw->priv;
780 mutex_lock(&ar->mutex);
781 if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
786 if (changed & IEEE80211_CONF_CHANGE_PS) {
787 err = carl9170_ps_update(ar);
792 if (changed & IEEE80211_CONF_CHANGE_POWER) {
797 if (changed & IEEE80211_CONF_CHANGE_SMPS) {
802 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
803 /* adjust slot time for 5 GHz */
804 err = carl9170_set_slot_time(ar);
808 err = carl9170_set_channel(ar, hw->conf.channel,
809 hw->conf.channel_type, CARL9170_RFI_NONE);
813 err = carl9170_set_dyn_sifs_ack(ar);
817 err = carl9170_set_rts_cts_rate(ar);
823 mutex_unlock(&ar->mutex);
827 static u64 carl9170_op_prepare_multicast(struct ieee80211_hw *hw,
828 struct netdev_hw_addr_list *mc_list)
830 struct netdev_hw_addr *ha;
833 /* always get broadcast frames */
834 mchash = 1ULL << (0xff >> 2);
836 netdev_hw_addr_list_for_each(ha, mc_list)
837 mchash |= 1ULL << (ha->addr[5] >> 2);
842 static void carl9170_op_configure_filter(struct ieee80211_hw *hw,
843 unsigned int changed_flags,
844 unsigned int *new_flags,
847 struct ar9170 *ar = hw->priv;
849 /* mask supported flags */
850 *new_flags &= FIF_ALLMULTI | ar->rx_filter_caps;
852 if (!IS_ACCEPTING_CMD(ar))
855 mutex_lock(&ar->mutex);
857 ar->filter_state = *new_flags;
859 * We can support more by setting the sniffer bit and
860 * then checking the error flags, later.
863 if (changed_flags & FIF_ALLMULTI && *new_flags & FIF_ALLMULTI)
866 if (multicast != ar->cur_mc_hash)
867 WARN_ON(carl9170_update_multicast(ar, multicast));
869 if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
870 ar->sniffer_enabled = !!(*new_flags &
871 (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS));
873 WARN_ON(carl9170_set_operating_mode(ar));
876 if (ar->fw.rx_filter && changed_flags & ar->rx_filter_caps) {
879 if (!(*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL)))
880 rx_filter |= CARL9170_RX_FILTER_BAD;
882 if (!(*new_flags & FIF_CONTROL))
883 rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
885 if (!(*new_flags & FIF_PSPOLL))
886 rx_filter |= CARL9170_RX_FILTER_CTL_PSPOLL;
888 if (!(*new_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))) {
889 rx_filter |= CARL9170_RX_FILTER_OTHER_RA;
890 rx_filter |= CARL9170_RX_FILTER_DECRY_FAIL;
893 WARN_ON(carl9170_rx_filter(ar, rx_filter));
896 mutex_unlock(&ar->mutex);
900 static void carl9170_op_bss_info_changed(struct ieee80211_hw *hw,
901 struct ieee80211_vif *vif,
902 struct ieee80211_bss_conf *bss_conf,
905 struct ar9170 *ar = hw->priv;
906 struct ath_common *common = &ar->common;
908 struct carl9170_vif_info *vif_priv;
909 struct ieee80211_vif *main_vif;
911 mutex_lock(&ar->mutex);
912 vif_priv = (void *) vif->drv_priv;
913 main_vif = carl9170_get_main_vif(ar);
914 if (WARN_ON(!main_vif))
917 if (changed & BSS_CHANGED_BEACON_ENABLED) {
918 struct carl9170_vif_info *iter;
921 vif_priv->enable_beacon = bss_conf->enable_beacon;
923 list_for_each_entry_rcu(iter, &ar->vif_list, list) {
924 if (iter->active && iter->enable_beacon)
930 ar->beacon_enabled = i;
933 if (changed & BSS_CHANGED_BEACON) {
934 err = carl9170_update_beacon(ar, false);
939 if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON |
940 BSS_CHANGED_BEACON_INT)) {
942 if (main_vif != vif) {
943 bss_conf->beacon_int = main_vif->bss_conf.beacon_int;
944 bss_conf->dtim_period = main_vif->bss_conf.dtim_period;
948 * Therefore a hard limit for the broadcast traffic should
949 * prevent false alarms.
951 if (vif->type != NL80211_IFTYPE_STATION &&
952 (bss_conf->beacon_int * bss_conf->dtim_period >=
953 (CARL9170_QUEUE_STUCK_TIMEOUT / 2))) {
958 err = carl9170_set_beacon_timers(ar);
963 if (changed & BSS_CHANGED_HT) {
974 * The following settings can only be changed by the
978 if (changed & BSS_CHANGED_BSSID) {
979 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
980 err = carl9170_set_operating_mode(ar);
985 if (changed & BSS_CHANGED_ASSOC) {
986 ar->common.curaid = bss_conf->aid;
987 err = carl9170_set_beacon_timers(ar);
992 if (changed & BSS_CHANGED_ERP_SLOT) {
993 err = carl9170_set_slot_time(ar);
998 if (changed & BSS_CHANGED_BASIC_RATES) {
999 err = carl9170_set_mac_rates(ar);
1005 WARN_ON_ONCE(err && IS_STARTED(ar));
1006 mutex_unlock(&ar->mutex);
1009 static u64 carl9170_op_get_tsf(struct ieee80211_hw *hw)
1011 struct ar9170 *ar = hw->priv;
1012 struct carl9170_tsf_rsp tsf;
1015 mutex_lock(&ar->mutex);
1016 err = carl9170_exec_cmd(ar, CARL9170_CMD_READ_TSF,
1017 0, NULL, sizeof(tsf), &tsf);
1018 mutex_unlock(&ar->mutex);
1022 return le64_to_cpu(tsf.tsf_64);
1025 static int carl9170_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1026 struct ieee80211_vif *vif,
1027 struct ieee80211_sta *sta,
1028 struct ieee80211_key_conf *key)
1030 struct ar9170 *ar = hw->priv;
1034 if (ar->disable_offload || !vif)
1038 * We have to fall back to software encryption, whenever
1039 * the user choose to participates in an IBSS or is connected
1040 * to more than one network.
1042 * This is very unfortunate, because some machines cannot handle
1043 * the high througput speed in 802.11n networks.
1046 if (!is_main_vif(ar, vif))
1050 * While the hardware supports *catch-all* key, for offloading
1051 * group-key en-/de-cryption. The way of how the hardware
1052 * decides which keyId maps to which key, remains a mystery...
1054 if ((vif->type != NL80211_IFTYPE_STATION &&
1055 vif->type != NL80211_IFTYPE_ADHOC) &&
1056 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1059 switch (key->cipher) {
1060 case WLAN_CIPHER_SUITE_WEP40:
1061 ktype = AR9170_ENC_ALG_WEP64;
1063 case WLAN_CIPHER_SUITE_WEP104:
1064 ktype = AR9170_ENC_ALG_WEP128;
1066 case WLAN_CIPHER_SUITE_TKIP:
1067 ktype = AR9170_ENC_ALG_TKIP;
1069 case WLAN_CIPHER_SUITE_CCMP:
1070 ktype = AR9170_ENC_ALG_AESCCMP;
1076 mutex_lock(&ar->mutex);
1077 if (cmd == SET_KEY) {
1078 if (!IS_STARTED(ar)) {
1083 if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1086 i = 64 + key->keyidx;
1088 for (i = 0; i < 64; i++)
1089 if (!(ar->usedkeys & BIT(i)))
1095 key->hw_key_idx = i;
1097 err = carl9170_upload_key(ar, i, sta ? sta->addr : NULL,
1099 min_t(u8, 16, key->keylen));
1103 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1104 err = carl9170_upload_key(ar, i, sta ? sta->addr :
1111 * hardware is not capable generating MMIC
1112 * of fragmented frames!
1114 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1118 ar->usedkeys |= BIT(i);
1120 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1122 if (!IS_STARTED(ar)) {
1123 /* The device is gone... together with the key ;-) */
1128 if (key->hw_key_idx < 64) {
1129 ar->usedkeys &= ~BIT(key->hw_key_idx);
1131 err = carl9170_upload_key(ar, key->hw_key_idx, NULL,
1132 AR9170_ENC_ALG_NONE, 0,
1137 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1138 err = carl9170_upload_key(ar, key->hw_key_idx,
1140 AR9170_ENC_ALG_NONE,
1148 err = carl9170_disable_key(ar, key->hw_key_idx);
1154 mutex_unlock(&ar->mutex);
1158 if (!ar->rx_software_decryption) {
1159 ar->rx_software_decryption = true;
1160 carl9170_set_operating_mode(ar);
1162 mutex_unlock(&ar->mutex);
1166 static int carl9170_op_sta_add(struct ieee80211_hw *hw,
1167 struct ieee80211_vif *vif,
1168 struct ieee80211_sta *sta)
1170 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1173 if (sta->ht_cap.ht_supported) {
1174 if (sta->ht_cap.ampdu_density > 6) {
1176 * HW does support 16us AMPDU density.
1177 * No HT-Xmit for station.
1183 for (i = 0; i < CARL9170_NUM_TID; i++)
1184 rcu_assign_pointer(sta_info->agg[i], NULL);
1186 sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor);
1187 sta_info->ht_sta = true;
1193 static int carl9170_op_sta_remove(struct ieee80211_hw *hw,
1194 struct ieee80211_vif *vif,
1195 struct ieee80211_sta *sta)
1197 struct ar9170 *ar = hw->priv;
1198 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1200 bool cleanup = false;
1202 if (sta->ht_cap.ht_supported) {
1204 sta_info->ht_sta = false;
1207 for (i = 0; i < CARL9170_NUM_TID; i++) {
1208 struct carl9170_sta_tid *tid_info;
1210 tid_info = rcu_dereference(sta_info->agg[i]);
1211 rcu_assign_pointer(sta_info->agg[i], NULL);
1216 spin_lock_bh(&ar->tx_ampdu_list_lock);
1217 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN)
1218 tid_info->state = CARL9170_TID_STATE_SHUTDOWN;
1219 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1225 carl9170_ampdu_gc(ar);
1231 static int carl9170_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1232 const struct ieee80211_tx_queue_params *param)
1234 struct ar9170 *ar = hw->priv;
1237 mutex_lock(&ar->mutex);
1238 if (queue < ar->hw->queues) {
1239 memcpy(&ar->edcf[ar9170_qmap[queue]], param, sizeof(*param));
1240 ret = carl9170_set_qos(ar);
1245 mutex_unlock(&ar->mutex);
1249 static void carl9170_ampdu_work(struct work_struct *work)
1251 struct ar9170 *ar = container_of(work, struct ar9170,
1254 if (!IS_STARTED(ar))
1257 mutex_lock(&ar->mutex);
1258 carl9170_ampdu_gc(ar);
1259 mutex_unlock(&ar->mutex);
1262 static int carl9170_op_ampdu_action(struct ieee80211_hw *hw,
1263 struct ieee80211_vif *vif,
1264 enum ieee80211_ampdu_mlme_action action,
1265 struct ieee80211_sta *sta,
1268 struct ar9170 *ar = hw->priv;
1269 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1270 struct carl9170_sta_tid *tid_info;
1276 case IEEE80211_AMPDU_TX_START:
1277 if (!sta_info->ht_sta)
1281 if (rcu_dereference(sta_info->agg[tid])) {
1286 tid_info = kzalloc(sizeof(struct carl9170_sta_tid),
1293 tid_info->hsn = tid_info->bsn = tid_info->snx = (*ssn);
1294 tid_info->state = CARL9170_TID_STATE_PROGRESS;
1295 tid_info->tid = tid;
1296 tid_info->max = sta_info->ampdu_max_len;
1298 INIT_LIST_HEAD(&tid_info->list);
1299 INIT_LIST_HEAD(&tid_info->tmp_list);
1300 skb_queue_head_init(&tid_info->queue);
1301 spin_lock_init(&tid_info->lock);
1303 spin_lock_bh(&ar->tx_ampdu_list_lock);
1304 ar->tx_ampdu_list_len++;
1305 list_add_tail_rcu(&tid_info->list, &ar->tx_ampdu_list);
1306 rcu_assign_pointer(sta_info->agg[tid], tid_info);
1307 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1310 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1313 case IEEE80211_AMPDU_TX_STOP:
1315 tid_info = rcu_dereference(sta_info->agg[tid]);
1317 spin_lock_bh(&ar->tx_ampdu_list_lock);
1318 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN)
1319 tid_info->state = CARL9170_TID_STATE_SHUTDOWN;
1320 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1323 rcu_assign_pointer(sta_info->agg[tid], NULL);
1326 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1327 ieee80211_queue_work(ar->hw, &ar->ampdu_work);
1330 case IEEE80211_AMPDU_TX_OPERATIONAL:
1332 tid_info = rcu_dereference(sta_info->agg[tid]);
1334 sta_info->stats[tid].clear = true;
1337 bitmap_zero(tid_info->bitmap, CARL9170_BAW_SIZE);
1338 tid_info->state = CARL9170_TID_STATE_IDLE;
1342 if (WARN_ON_ONCE(!tid_info))
1347 case IEEE80211_AMPDU_RX_START:
1348 case IEEE80211_AMPDU_RX_STOP:
1349 /* Handled by hardware */
1359 #ifdef CONFIG_CARL9170_WPC
1360 static int carl9170_register_wps_button(struct ar9170 *ar)
1362 struct input_dev *input;
1365 if (!(ar->features & CARL9170_WPS_BUTTON))
1368 input = input_allocate_device();
1372 snprintf(ar->wps.name, sizeof(ar->wps.name), "%s WPS Button",
1373 wiphy_name(ar->hw->wiphy));
1375 snprintf(ar->wps.phys, sizeof(ar->wps.phys),
1376 "ieee80211/%s/input0", wiphy_name(ar->hw->wiphy));
1378 input->name = ar->wps.name;
1379 input->phys = ar->wps.phys;
1380 input->id.bustype = BUS_USB;
1381 input->dev.parent = &ar->hw->wiphy->dev;
1383 input_set_capability(input, EV_KEY, KEY_WPS_BUTTON);
1385 err = input_register_device(input);
1387 input_free_device(input);
1391 ar->wps.pbc = input;
1394 #endif /* CONFIG_CARL9170_WPC */
1396 static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx,
1397 struct survey_info *survey)
1399 struct ar9170 *ar = hw->priv;
1405 mutex_lock(&ar->mutex);
1406 err = carl9170_get_noisefloor(ar);
1407 mutex_unlock(&ar->mutex);
1411 survey->channel = ar->channel;
1412 survey->filled = SURVEY_INFO_NOISE_DBM;
1413 survey->noise = ar->noise[0];
1417 static void carl9170_op_flush(struct ieee80211_hw *hw, bool drop)
1419 struct ar9170 *ar = hw->priv;
1422 mutex_lock(&ar->mutex);
1423 for_each_set_bit(vid, &ar->vif_bitmap, ar->fw.vif_num)
1424 carl9170_flush_cab(ar, vid);
1426 carl9170_flush(ar, drop);
1427 mutex_unlock(&ar->mutex);
1430 static int carl9170_op_get_stats(struct ieee80211_hw *hw,
1431 struct ieee80211_low_level_stats *stats)
1433 struct ar9170 *ar = hw->priv;
1435 memset(stats, 0, sizeof(*stats));
1436 stats->dot11ACKFailureCount = ar->tx_ack_failures;
1437 stats->dot11FCSErrorCount = ar->tx_fcs_errors;
1441 static void carl9170_op_sta_notify(struct ieee80211_hw *hw,
1442 struct ieee80211_vif *vif,
1443 enum sta_notify_cmd cmd,
1444 struct ieee80211_sta *sta)
1446 struct ar9170 *ar = hw->priv;
1447 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1448 struct sk_buff *skb, *tmp;
1449 struct sk_buff_head free;
1453 case STA_NOTIFY_SLEEP:
1455 * Since the peer is no longer listening, we have to return
1456 * as many SKBs as possible back to the mac80211 stack.
1457 * It will deal with the retry procedure, once the peer
1458 * has become available again.
1460 * NB: Ideally, the driver should return the all frames in
1461 * the correct, ascending order. However, I think that this
1462 * functionality should be implemented in the stack and not
1466 __skb_queue_head_init(&free);
1468 if (sta->ht_cap.ht_supported) {
1470 for (i = 0; i < CARL9170_NUM_TID; i++) {
1471 struct carl9170_sta_tid *tid_info;
1473 tid_info = rcu_dereference(sta_info->agg[i]);
1478 spin_lock_bh(&ar->tx_ampdu_list_lock);
1479 if (tid_info->state >
1480 CARL9170_TID_STATE_SUSPEND)
1482 CARL9170_TID_STATE_SUSPEND;
1483 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1485 spin_lock_bh(&tid_info->lock);
1486 while ((skb = __skb_dequeue(&tid_info->queue)))
1487 __skb_queue_tail(&free, skb);
1488 spin_unlock_bh(&tid_info->lock);
1493 for (i = 0; i < ar->hw->queues; i++) {
1494 spin_lock_bh(&ar->tx_pending[i].lock);
1495 skb_queue_walk_safe(&ar->tx_pending[i], skb, tmp) {
1496 struct _carl9170_tx_superframe *super;
1497 struct ieee80211_hdr *hdr;
1498 struct ieee80211_tx_info *info;
1500 super = (void *) skb->data;
1501 hdr = (void *) super->frame_data;
1503 if (compare_ether_addr(hdr->addr1, sta->addr))
1506 __skb_unlink(skb, &ar->tx_pending[i]);
1508 info = IEEE80211_SKB_CB(skb);
1509 if (info->flags & IEEE80211_TX_CTL_AMPDU)
1510 atomic_dec(&ar->tx_ampdu_upload);
1512 carl9170_tx_status(ar, skb, false);
1514 spin_unlock_bh(&ar->tx_pending[i].lock);
1517 while ((skb = __skb_dequeue(&free)))
1518 carl9170_tx_status(ar, skb, false);
1522 case STA_NOTIFY_AWAKE:
1523 if (!sta->ht_cap.ht_supported)
1527 for (i = 0; i < CARL9170_NUM_TID; i++) {
1528 struct carl9170_sta_tid *tid_info;
1530 tid_info = rcu_dereference(sta_info->agg[i]);
1535 if ((tid_info->state == CARL9170_TID_STATE_SUSPEND))
1536 tid_info->state = CARL9170_TID_STATE_IDLE;
1543 static const struct ieee80211_ops carl9170_ops = {
1544 .start = carl9170_op_start,
1545 .stop = carl9170_op_stop,
1546 .tx = carl9170_op_tx,
1547 .flush = carl9170_op_flush,
1548 .add_interface = carl9170_op_add_interface,
1549 .remove_interface = carl9170_op_remove_interface,
1550 .config = carl9170_op_config,
1551 .prepare_multicast = carl9170_op_prepare_multicast,
1552 .configure_filter = carl9170_op_configure_filter,
1553 .conf_tx = carl9170_op_conf_tx,
1554 .bss_info_changed = carl9170_op_bss_info_changed,
1555 .get_tsf = carl9170_op_get_tsf,
1556 .set_key = carl9170_op_set_key,
1557 .sta_add = carl9170_op_sta_add,
1558 .sta_remove = carl9170_op_sta_remove,
1559 .sta_notify = carl9170_op_sta_notify,
1560 .get_survey = carl9170_op_get_survey,
1561 .get_stats = carl9170_op_get_stats,
1562 .ampdu_action = carl9170_op_ampdu_action,
1565 void *carl9170_alloc(size_t priv_size)
1567 struct ieee80211_hw *hw;
1569 struct sk_buff *skb;
1573 * this buffer is used for rx stream reconstruction.
1574 * Under heavy load this device (or the transport layer?)
1575 * tends to split the streams into separate rx descriptors.
1578 skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL);
1582 hw = ieee80211_alloc_hw(priv_size, &carl9170_ops);
1588 ar->rx_failover = skb;
1590 memset(&ar->rx_plcp, 0, sizeof(struct ar9170_rx_head));
1591 ar->rx_has_plcp = false;
1594 * Here's a hidden pitfall!
1596 * All 4 AC queues work perfectly well under _legacy_ operation.
1597 * However as soon as aggregation is enabled, the traffic flow
1598 * gets very bumpy. Therefore we have to _switch_ to a
1599 * software AC with a single HW queue.
1601 hw->queues = __AR9170_NUM_TXQ;
1603 mutex_init(&ar->mutex);
1604 spin_lock_init(&ar->beacon_lock);
1605 spin_lock_init(&ar->cmd_lock);
1606 spin_lock_init(&ar->tx_stats_lock);
1607 spin_lock_init(&ar->tx_ampdu_list_lock);
1608 spin_lock_init(&ar->mem_lock);
1609 spin_lock_init(&ar->state_lock);
1610 atomic_set(&ar->pending_restarts, 0);
1612 for (i = 0; i < ar->hw->queues; i++) {
1613 skb_queue_head_init(&ar->tx_status[i]);
1614 skb_queue_head_init(&ar->tx_pending[i]);
1616 INIT_WORK(&ar->ps_work, carl9170_ps_work);
1617 INIT_WORK(&ar->restart_work, carl9170_restart_work);
1618 INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work);
1619 INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor);
1620 INIT_LIST_HEAD(&ar->tx_ampdu_list);
1621 rcu_assign_pointer(ar->tx_ampdu_iter,
1622 (struct carl9170_sta_tid *) &ar->tx_ampdu_list);
1624 bitmap_zero(&ar->vif_bitmap, ar->fw.vif_num);
1625 INIT_LIST_HEAD(&ar->vif_list);
1626 init_completion(&ar->tx_flush);
1630 * IBSS/ADHOC and AP mode are only enabled, if the firmware
1631 * supports these modes. The code which will add the
1632 * additional interface_modes is in fw.c.
1634 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1636 hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS |
1637 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
1638 IEEE80211_HW_SUPPORTS_PS |
1639 IEEE80211_HW_PS_NULLFUNC_STACK |
1640 IEEE80211_HW_SIGNAL_DBM;
1642 if (!modparam_noht) {
1644 * see the comment above, why we allow the user
1645 * to disable HT by a module parameter.
1647 hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
1650 hw->extra_tx_headroom = sizeof(struct _carl9170_tx_superframe);
1651 hw->sta_data_size = sizeof(struct carl9170_sta_info);
1652 hw->vif_data_size = sizeof(struct carl9170_vif_info);
1654 hw->max_rates = CARL9170_TX_MAX_RATES;
1655 hw->max_rate_tries = CARL9170_TX_USER_RATE_TRIES;
1657 for (i = 0; i < ARRAY_SIZE(ar->noise); i++)
1658 ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
1660 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
1665 return ERR_PTR(-ENOMEM);
1668 static int carl9170_read_eeprom(struct ar9170 *ar)
1670 #define RW 8 /* number of words to read at once */
1671 #define RB (sizeof(u32) * RW)
1672 u8 *eeprom = (void *)&ar->eeprom;
1676 BUILD_BUG_ON(sizeof(ar->eeprom) & 3);
1678 BUILD_BUG_ON(RB > CARL9170_MAX_CMD_LEN - 4);
1680 /* don't want to handle trailing remains */
1681 BUILD_BUG_ON(sizeof(ar->eeprom) % RB);
1684 for (i = 0; i < sizeof(ar->eeprom)/RB; i++) {
1685 for (j = 0; j < RW; j++)
1686 offsets[j] = cpu_to_le32(AR9170_EEPROM_START +
1689 err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
1690 RB, (u8 *) &offsets,
1691 RB, eeprom + RB * i);
1701 static int carl9170_parse_eeprom(struct ar9170 *ar)
1703 struct ath_regulatory *regulatory = &ar->common.regulatory;
1704 unsigned int rx_streams, tx_streams, tx_params = 0;
1707 if (ar->eeprom.length == cpu_to_le16(0xffff))
1710 rx_streams = hweight8(ar->eeprom.rx_mask);
1711 tx_streams = hweight8(ar->eeprom.tx_mask);
1713 if (rx_streams != tx_streams) {
1714 tx_params = IEEE80211_HT_MCS_TX_RX_DIFF;
1716 WARN_ON(!(tx_streams >= 1 && tx_streams <=
1717 IEEE80211_HT_MCS_TX_MAX_STREAMS));
1719 tx_params = (tx_streams - 1) <<
1720 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1722 carl9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params;
1723 carl9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params;
1726 if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
1727 ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1728 &carl9170_band_2GHz;
1731 if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
1732 ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1733 &carl9170_band_5GHz;
1738 * I measured this, a bandswitch takes roughly
1739 * 135 ms and a frequency switch about 80.
1741 * FIXME: measure these values again once EEPROM settings
1742 * are used, that will influence them!
1745 ar->hw->channel_change_time = 135 * 1000;
1747 ar->hw->channel_change_time = 80 * 1000;
1749 regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
1750 regulatory->current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]);
1752 /* second part of wiphy init */
1753 SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address);
1755 return bands ? 0 : -EINVAL;
1758 static int carl9170_reg_notifier(struct wiphy *wiphy,
1759 struct regulatory_request *request)
1761 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1762 struct ar9170 *ar = hw->priv;
1764 return ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory);
1767 int carl9170_register(struct ar9170 *ar)
1769 struct ath_regulatory *regulatory = &ar->common.regulatory;
1772 if (WARN_ON(ar->mem_bitmap))
1775 ar->mem_bitmap = kzalloc(roundup(ar->fw.mem_blocks, BITS_PER_LONG) *
1776 sizeof(unsigned long), GFP_KERNEL);
1778 if (!ar->mem_bitmap)
1781 /* try to read EEPROM, init MAC addr */
1782 err = carl9170_read_eeprom(ar);
1786 err = carl9170_fw_fix_eeprom(ar);
1790 err = carl9170_parse_eeprom(ar);
1794 err = ath_regd_init(regulatory, ar->hw->wiphy,
1795 carl9170_reg_notifier);
1799 if (modparam_noht) {
1800 carl9170_band_2GHz.ht_cap.ht_supported = false;
1801 carl9170_band_5GHz.ht_cap.ht_supported = false;
1804 for (i = 0; i < ar->fw.vif_num; i++) {
1805 ar->vif_priv[i].id = i;
1806 ar->vif_priv[i].vif = NULL;
1809 err = ieee80211_register_hw(ar->hw);
1813 /* mac80211 interface is now registered */
1814 ar->registered = true;
1816 if (!ath_is_world_regd(regulatory))
1817 regulatory_hint(ar->hw->wiphy, regulatory->alpha2);
1819 #ifdef CONFIG_CARL9170_DEBUGFS
1820 carl9170_debugfs_register(ar);
1821 #endif /* CONFIG_CARL9170_DEBUGFS */
1823 err = carl9170_led_init(ar);
1827 #ifdef CONFIG_CARL9170_LEDS
1828 err = carl9170_led_register(ar);
1831 #endif /* CONFIG_CAR9L170_LEDS */
1833 #ifdef CONFIG_CARL9170_WPC
1834 err = carl9170_register_wps_button(ar);
1837 #endif /* CONFIG_CARL9170_WPC */
1839 dev_info(&ar->udev->dev, "Atheros AR9170 is registered as '%s'\n",
1840 wiphy_name(ar->hw->wiphy));
1845 carl9170_unregister(ar);
1849 void carl9170_unregister(struct ar9170 *ar)
1851 if (!ar->registered)
1854 ar->registered = false;
1856 #ifdef CONFIG_CARL9170_LEDS
1857 carl9170_led_unregister(ar);
1858 #endif /* CONFIG_CARL9170_LEDS */
1860 #ifdef CONFIG_CARL9170_DEBUGFS
1861 carl9170_debugfs_unregister(ar);
1862 #endif /* CONFIG_CARL9170_DEBUGFS */
1864 #ifdef CONFIG_CARL9170_WPC
1866 input_unregister_device(ar->wps.pbc);
1869 #endif /* CONFIG_CARL9170_WPC */
1871 carl9170_cancel_worker(ar);
1872 cancel_work_sync(&ar->restart_work);
1874 ieee80211_unregister_hw(ar->hw);
1877 void carl9170_free(struct ar9170 *ar)
1879 WARN_ON(ar->registered);
1880 WARN_ON(IS_INITIALIZED(ar));
1882 kfree_skb(ar->rx_failover);
1883 ar->rx_failover = NULL;
1885 kfree(ar->mem_bitmap);
1886 ar->mem_bitmap = NULL;
1888 mutex_destroy(&ar->mutex);
1890 ieee80211_free_hw(ar->hw);