1/*-
  2 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
  3 * Copyright (c) 2004-2005 Atheros Communications, Inc.
  4 * Copyright (c) 2006 Devicescape Software, Inc.
  5 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
  6 * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
  7 * Copyright (c) 2010 Bruno Randolf <br1@einfach.org>
  8 *
  9 * All rights reserved.
 10 *
 11 * Redistribution and use in source and binary forms, with or without
 12 * modification, are permitted provided that the following conditions
 13 * are met:
 14 * 1. Redistributions of source code must retain the above copyright
 15 *    notice, this list of conditions and the following disclaimer,
 16 *    without modification.
 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 18 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
 19 *    redistribution must be conditioned upon including a substantially
 20 *    similar Disclaimer requirement for further binary redistribution.
 21 * 3. Neither the names of the above-listed copyright holders nor the names
 22 *    of any contributors may be used to endorse or promote products derived
 23 *    from this software without specific prior written permission.
 24 *
 25 * Alternatively, this software may be distributed under the terms of the
 26 * GNU General Public License ("GPL") version 2 as published by the Free
 27 * Software Foundation.
 28 *
 29 * NO WARRANTY
 30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 31 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 32 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
 33 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 34 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
 35 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 38 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 40 * THE POSSIBILITY OF SUCH DAMAGES.
 41 *
 42 */
 43
 44#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 45
 46#include <net/mac80211.h>
 47#include <asm/unaligned.h>
 48
 49#include "ath5k.h"
 50#include "base.h"
 51#include "reg.h"
 52
 53/********************\
 54* Mac80211 functions *
 55\********************/
 56
 57static void
 58ath5k_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
 59	 struct sk_buff *skb)
 60{
 61	struct ath5k_hw *ah = hw->priv;
 62	u16 qnum = skb_get_queue_mapping(skb);
 63
 64	if (WARN_ON(qnum >= ah->ah_capabilities.cap_queues.q_tx_num)) {
 65		ieee80211_free_txskb(hw, skb);
 66		return;
 67	}
 68
 69	ath5k_tx_queue(hw, skb, &ah->txqs[qnum], control);
 70}
 71
 72
 73static int
 74ath5k_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 75{
 76	struct ath5k_hw *ah = hw->priv;
 77	int ret;
 78	struct ath5k_vif *avf = (void *)vif->drv_priv;
 79
 80	mutex_lock(&ah->lock);
 81
 82	if ((vif->type == NL80211_IFTYPE_AP ||
 83	     vif->type == NL80211_IFTYPE_ADHOC)
 84	    && (ah->num_ap_vifs + ah->num_adhoc_vifs) >= ATH_BCBUF) {
 85		ret = -ELNRNG;
 86		goto end;
 87	}
 88
 89	/* Don't allow other interfaces if one ad-hoc is configured.
 90	 * TODO: Fix the problems with ad-hoc and multiple other interfaces.
 91	 * We would need to operate the HW in ad-hoc mode to allow TSF updates
 92	 * for the IBSS, but this breaks with additional AP or STA interfaces
 93	 * at the moment. */
 94	if (ah->num_adhoc_vifs ||
 95	    (ah->nvifs && vif->type == NL80211_IFTYPE_ADHOC)) {
 96		ATH5K_ERR(ah, "Only one single ad-hoc interface is allowed.\n");
 97		ret = -ELNRNG;
 98		goto end;
 99	}
100
101	switch (vif->type) {
102	case NL80211_IFTYPE_AP:
103	case NL80211_IFTYPE_STATION:
104	case NL80211_IFTYPE_ADHOC:
105	case NL80211_IFTYPE_MESH_POINT:
106		avf->opmode = vif->type;
107		break;
108	default:
109		ret = -EOPNOTSUPP;
110		goto end;
111	}
112
113	ah->nvifs++;
114	ATH5K_DBG(ah, ATH5K_DEBUG_MODE, "add interface mode %d\n", avf->opmode);
115
116	/* Assign the vap/adhoc to a beacon xmit slot. */
117	if ((avf->opmode == NL80211_IFTYPE_AP) ||
118	    (avf->opmode == NL80211_IFTYPE_ADHOC) ||
119	    (avf->opmode == NL80211_IFTYPE_MESH_POINT)) {
120		int slot;
121
122		WARN_ON(list_empty(&ah->bcbuf));
123		avf->bbuf = list_first_entry(&ah->bcbuf, struct ath5k_buf,
124					     list);
125		list_del(&avf->bbuf->list);
126
127		avf->bslot = 0;
128		for (slot = 0; slot < ATH_BCBUF; slot++) {
129			if (!ah->bslot[slot]) {
130				avf->bslot = slot;
131				break;
132			}
133		}
134		BUG_ON(ah->bslot[avf->bslot] != NULL);
135		ah->bslot[avf->bslot] = vif;
136		if (avf->opmode == NL80211_IFTYPE_AP)
137			ah->num_ap_vifs++;
138		else if (avf->opmode == NL80211_IFTYPE_ADHOC)
139			ah->num_adhoc_vifs++;
140		else if (avf->opmode == NL80211_IFTYPE_MESH_POINT)
141			ah->num_mesh_vifs++;
142	}
143
144	/* Any MAC address is fine, all others are included through the
145	 * filter.
146	 */
147	ath5k_hw_set_lladdr(ah, vif->addr);
148
149	ath5k_update_bssid_mask_and_opmode(ah, vif);
150	ret = 0;
151end:
152	mutex_unlock(&ah->lock);
153	return ret;
154}
155
156
157static void
158ath5k_remove_interface(struct ieee80211_hw *hw,
159		       struct ieee80211_vif *vif)
160{
161	struct ath5k_hw *ah = hw->priv;
162	struct ath5k_vif *avf = (void *)vif->drv_priv;
163	unsigned int i;
164
165	mutex_lock(&ah->lock);
166	ah->nvifs--;
167
168	if (avf->bbuf) {
169		ath5k_txbuf_free_skb(ah, avf->bbuf);
170		list_add_tail(&avf->bbuf->list, &ah->bcbuf);
171		for (i = 0; i < ATH_BCBUF; i++) {
172			if (ah->bslot[i] == vif) {
173				ah->bslot[i] = NULL;
174				break;
175			}
176		}
177		avf->bbuf = NULL;
178	}
179	if (avf->opmode == NL80211_IFTYPE_AP)
180		ah->num_ap_vifs--;
181	else if (avf->opmode == NL80211_IFTYPE_ADHOC)
182		ah->num_adhoc_vifs--;
183	else if (avf->opmode == NL80211_IFTYPE_MESH_POINT)
184		ah->num_mesh_vifs--;
185
186	ath5k_update_bssid_mask_and_opmode(ah, NULL);
187	mutex_unlock(&ah->lock);
188}
189
190
191/*
192 * TODO: Phy disable/diversity etc
193 */
194static int
195ath5k_config(struct ieee80211_hw *hw, u32 changed)
196{
197	struct ath5k_hw *ah = hw->priv;
198	struct ieee80211_conf *conf = &hw->conf;
199	int ret = 0;
200	int i;
201
202	mutex_lock(&ah->lock);
203
204	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
205		ret = ath5k_chan_set(ah, &conf->chandef);
206		if (ret < 0)
207			goto unlock;
208	}
209
210	if ((changed & IEEE80211_CONF_CHANGE_POWER) &&
211	(ah->ah_txpower.txp_requested != conf->power_level)) {
212		ah->ah_txpower.txp_requested = conf->power_level;
213
214		/* Half dB steps */
215		ath5k_hw_set_txpower_limit(ah, (conf->power_level * 2));
216	}
217
218	if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
219		ah->ah_retry_long = conf->long_frame_max_tx_count;
220		ah->ah_retry_short = conf->short_frame_max_tx_count;
221
222		for (i = 0; i < ah->ah_capabilities.cap_queues.q_tx_num; i++)
223			ath5k_hw_set_tx_retry_limits(ah, i);
224	}
225
226	/* TODO:
227	 * 1) Move this on config_interface and handle each case
228	 * separately eg. when we have only one STA vif, use
229	 * AR5K_ANTMODE_SINGLE_AP
230	 *
231	 * 2) Allow the user to change antenna mode eg. when only
232	 * one antenna is present
233	 *
234	 * 3) Allow the user to set default/tx antenna when possible
235	 *
236	 * 4) Default mode should handle 90% of the cases, together
237	 * with fixed a/b and single AP modes we should be able to
238	 * handle 99%. Sectored modes are extreme cases and i still
239	 * haven't found a usage for them. If we decide to support them,
240	 * then we must allow the user to set how many tx antennas we
241	 * have available
242	 */
243	ath5k_hw_set_antenna_mode(ah, ah->ah_ant_mode);
244
245unlock:
246	mutex_unlock(&ah->lock);
247	return ret;
248}
249
250
251static void
252ath5k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
253		       struct ieee80211_bss_conf *bss_conf, u64 changes)
254{
255	struct ath5k_vif *avf = (void *)vif->drv_priv;
256	struct ath5k_hw *ah = hw->priv;
257	struct ath_common *common = ath5k_hw_common(ah);
258
259	mutex_lock(&ah->lock);
260
261	if (changes & BSS_CHANGED_BSSID) {
262		/* Cache for later use during resets */
263		memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
264		common->curaid = 0;
265		ath5k_hw_set_bssid(ah);
 
266	}
267
268	if (changes & BSS_CHANGED_BEACON_INT)
269		ah->bintval = bss_conf->beacon_int;
270
271	if (changes & BSS_CHANGED_ERP_SLOT) {
272		int slot_time;
273
274		ah->ah_short_slot = bss_conf->use_short_slot;
275		slot_time = ath5k_hw_get_default_slottime(ah) +
276			    3 * ah->ah_coverage_class;
277		ath5k_hw_set_ifs_intervals(ah, slot_time);
278	}
279
280	if (changes & BSS_CHANGED_ASSOC) {
281		avf->assoc = vif->cfg.assoc;
282		if (vif->cfg.assoc)
283			ah->assoc = vif->cfg.assoc;
284		else
285			ah->assoc = ath5k_any_vif_assoc(ah);
286
287		if (ah->opmode == NL80211_IFTYPE_STATION)
288			ath5k_set_beacon_filter(hw, ah->assoc);
289		ath5k_hw_set_ledstate(ah, ah->assoc ?
290			AR5K_LED_ASSOC : AR5K_LED_INIT);
291		if (vif->cfg.assoc) {
292			ATH5K_DBG(ah, ATH5K_DEBUG_ANY,
293				  "Bss Info ASSOC %d, bssid: %pM\n",
294				  vif->cfg.aid, common->curbssid);
295			common->curaid = vif->cfg.aid;
296			ath5k_hw_set_bssid(ah);
297			/* Once ANI is available you would start it here */
298		}
299	}
300
301	if (changes & BSS_CHANGED_BEACON) {
302		spin_lock_bh(&ah->block);
303		ath5k_beacon_update(hw, vif);
304		spin_unlock_bh(&ah->block);
305	}
306
307	if (changes & BSS_CHANGED_BEACON_ENABLED)
308		ah->enable_beacon = bss_conf->enable_beacon;
309
310	if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED |
311		       BSS_CHANGED_BEACON_INT))
312		ath5k_beacon_config(ah);
313
314	mutex_unlock(&ah->lock);
315}
316
317
318static u64
319ath5k_prepare_multicast(struct ieee80211_hw *hw,
320			struct netdev_hw_addr_list *mc_list)
321{
322	u32 mfilt[2], val;
323	u8 pos;
324	struct netdev_hw_addr *ha;
325
326	mfilt[0] = 0;
327	mfilt[1] = 0;
328
329	netdev_hw_addr_list_for_each(ha, mc_list) {
330		/* calculate XOR of eight 6-bit values */
331		val = get_unaligned_le32(ha->addr + 0);
332		pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
333		val = get_unaligned_le32(ha->addr + 3);
334		pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
335		pos &= 0x3f;
336		mfilt[pos / 32] |= (1 << (pos % 32));
337		/* XXX: we might be able to just do this instead,
338		* but not sure, needs testing, if we do use this we'd
339		* need to inform below not to reset the mcast */
340		/* ath5k_hw_set_mcast_filterindex(ah,
341		 *      ha->addr[5]); */
342	}
343
344	return ((u64)(mfilt[1]) << 32) | mfilt[0];
345}
346
347
348/*
349 * o always accept unicast, broadcast, and multicast traffic
350 * o multicast traffic for all BSSIDs will be enabled if mac80211
351 *   says it should be
352 * o maintain current state of phy ofdm or phy cck error reception.
353 *   If the hardware detects any of these type of errors then
354 *   ath5k_hw_get_rx_filter() will pass to us the respective
355 *   hardware filters to be able to receive these type of frames.
356 * o probe request frames are accepted only when operating in
357 *   hostap, adhoc, or monitor modes
358 * o enable promiscuous mode according to the interface state
359 * o accept beacons:
360 *   - when operating in adhoc mode so the 802.11 layer creates
361 *     node table entries for peers,
362 *   - when operating in station mode for collecting rssi data when
363 *     the station is otherwise quiet, or
364 *   - when scanning
365 */
366static void
367ath5k_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
368		       unsigned int *new_flags, u64 multicast)
369{
370#define SUPPORTED_FIF_FLAGS \
371	(FIF_ALLMULTI | FIF_FCSFAIL | \
372	FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \
373	FIF_BCN_PRBRESP_PROMISC)
374
375	struct ath5k_hw *ah = hw->priv;
376	u32 mfilt[2], rfilt;
377	struct ath5k_vif_iter_data iter_data; /* to count STA interfaces */
378
379	mutex_lock(&ah->lock);
380
381	mfilt[0] = multicast;
382	mfilt[1] = multicast >> 32;
383
384	/* Only deal with supported flags */
 
385	*new_flags &= SUPPORTED_FIF_FLAGS;
386
387	/* If HW detects any phy or radar errors, leave those filters on.
388	 * Also, always enable Unicast, Broadcasts and Multicast
389	 * XXX: move unicast, bssid broadcasts and multicast to mac80211 */
390	rfilt = (ath5k_hw_get_rx_filter(ah) & (AR5K_RX_FILTER_PHYERR)) |
391		(AR5K_RX_FILTER_UCAST | AR5K_RX_FILTER_BCAST |
392		AR5K_RX_FILTER_MCAST);
393
394	/* Note, AR5K_RX_FILTER_MCAST is already enabled */
395	if (*new_flags & FIF_ALLMULTI) {
396		mfilt[0] =  ~0;
397		mfilt[1] =  ~0;
398	}
399
400	/* This is the best we can do */
401	if (*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL))
402		rfilt |= AR5K_RX_FILTER_PHYERR;
403
404	/* FIF_BCN_PRBRESP_PROMISC really means to enable beacons
405	* and probes for any BSSID */
406	if ((*new_flags & FIF_BCN_PRBRESP_PROMISC) || (ah->nvifs > 1))
407		rfilt |= AR5K_RX_FILTER_BEACON;
408
409	/* FIF_CONTROL doc says we should only pass on control frames for this
410	 * station. This needs testing. I believe right now this
411	 * enables *all* control frames, which is OK.. but
412	 * we should see if we can improve on granularity */
413	if (*new_flags & FIF_CONTROL)
414		rfilt |= AR5K_RX_FILTER_CONTROL;
415
416	/* Additional settings per mode -- this is per ath5k */
417
418	/* XXX move these to mac80211, and add a beacon IFF flag to mac80211 */
419
420	switch (ah->opmode) {
421	case NL80211_IFTYPE_MESH_POINT:
422		rfilt |= AR5K_RX_FILTER_CONTROL |
423			 AR5K_RX_FILTER_BEACON |
424			 AR5K_RX_FILTER_PROBEREQ |
425			 AR5K_RX_FILTER_PROM;
426		break;
427	case NL80211_IFTYPE_AP:
428	case NL80211_IFTYPE_ADHOC:
429		rfilt |= AR5K_RX_FILTER_PROBEREQ |
430			 AR5K_RX_FILTER_BEACON;
431		break;
432	case NL80211_IFTYPE_STATION:
433		if (ah->assoc)
434			rfilt |= AR5K_RX_FILTER_BEACON;
435		break;
436	default:
437		break;
438	}
439
440	iter_data.hw_macaddr = NULL;
441	iter_data.n_stas = 0;
442	iter_data.need_set_hw_addr = false;
443	ieee80211_iterate_active_interfaces_atomic(
444		ah->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
445		ath5k_vif_iter, &iter_data);
446
447	/* Set up RX Filter */
448	if (iter_data.n_stas > 1) {
449		/* If you have multiple STA interfaces connected to
450		 * different APs, ARPs are not received (most of the time?)
451		 * Enabling PROMISC appears to fix that problem.
452		 */
453		rfilt |= AR5K_RX_FILTER_PROM;
454	}
455
456	/* Set filters */
457	ath5k_hw_set_rx_filter(ah, rfilt);
458
459	/* Set multicast bits */
460	ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]);
461	/* Set the cached hw filter flags, this will later actually
462	 * be set in HW */
463	ah->filter_flags = rfilt;
464	/* Store current FIF filter flags */
465	ah->fif_filter_flags = *new_flags;
466
467	mutex_unlock(&ah->lock);
468}
469
470
471static int
472ath5k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
473	      struct ieee80211_vif *vif, struct ieee80211_sta *sta,
474	      struct ieee80211_key_conf *key)
475{
476	struct ath5k_hw *ah = hw->priv;
477	struct ath_common *common = ath5k_hw_common(ah);
478	int ret = 0;
479
480	if (ath5k_modparam_nohwcrypt)
481		return -EOPNOTSUPP;
482
483	if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT)
484		return -EOPNOTSUPP;
485
486	if (vif->type == NL80211_IFTYPE_ADHOC &&
487	    (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
488	     key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
489	    !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
490		/* don't program group keys when using IBSS_RSN */
491		return -EOPNOTSUPP;
492	}
493
494	switch (key->cipher) {
495	case WLAN_CIPHER_SUITE_WEP40:
496	case WLAN_CIPHER_SUITE_WEP104:
497	case WLAN_CIPHER_SUITE_TKIP:
498		break;
499	case WLAN_CIPHER_SUITE_CCMP:
500		if (common->crypt_caps & ATH_CRYPT_CAP_CIPHER_AESCCM)
501			break;
502		return -EOPNOTSUPP;
503	default:
504		return -EOPNOTSUPP;
505	}
506
507	mutex_lock(&ah->lock);
508
509	switch (cmd) {
510	case SET_KEY:
511		ret = ath_key_config(common, vif, sta, key);
512		if (ret >= 0) {
513			key->hw_key_idx = ret;
514			/* push IV and Michael MIC generation to stack */
515			key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
516			if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
517				key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
518			if (key->cipher == WLAN_CIPHER_SUITE_CCMP)
519				key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
520			ret = 0;
521		}
522		break;
523	case DISABLE_KEY:
524		ath_key_delete(common, key->hw_key_idx);
525		break;
526	default:
527		ret = -EINVAL;
528	}
529
 
530	mutex_unlock(&ah->lock);
531	return ret;
532}
533
534
535static void
536ath5k_sw_scan_start(struct ieee80211_hw *hw,
537		    struct ieee80211_vif *vif,
538		    const u8 *mac_addr)
539{
540	struct ath5k_hw *ah = hw->priv;
541	if (!ah->assoc)
542		ath5k_hw_set_ledstate(ah, AR5K_LED_SCAN);
543}
544
545
546static void
547ath5k_sw_scan_complete(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
548{
549	struct ath5k_hw *ah = hw->priv;
550	ath5k_hw_set_ledstate(ah, ah->assoc ?
551		AR5K_LED_ASSOC : AR5K_LED_INIT);
552}
553
554
555static int
556ath5k_get_stats(struct ieee80211_hw *hw,
557		struct ieee80211_low_level_stats *stats)
558{
559	struct ath5k_hw *ah = hw->priv;
560
561	/* Force update */
562	ath5k_hw_update_mib_counters(ah);
563
564	stats->dot11ACKFailureCount = ah->stats.ack_fail;
565	stats->dot11RTSFailureCount = ah->stats.rts_fail;
566	stats->dot11RTSSuccessCount = ah->stats.rts_ok;
567	stats->dot11FCSErrorCount = ah->stats.fcs_error;
568
569	return 0;
570}
571
572
573static int
574ath5k_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
575	      unsigned int link_id, u16 queue,
576	      const struct ieee80211_tx_queue_params *params)
577{
578	struct ath5k_hw *ah = hw->priv;
579	struct ath5k_txq_info qi;
580	int ret = 0;
581
582	if (queue >= ah->ah_capabilities.cap_queues.q_tx_num)
583		return 0;
584
585	mutex_lock(&ah->lock);
586
587	ath5k_hw_get_tx_queueprops(ah, queue, &qi);
588
589	qi.tqi_aifs = params->aifs;
590	qi.tqi_cw_min = params->cw_min;
591	qi.tqi_cw_max = params->cw_max;
592	qi.tqi_burst_time = params->txop * 32;
593
594	ATH5K_DBG(ah, ATH5K_DEBUG_ANY,
595		  "Configure tx [queue %d],  "
596		  "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
597		  queue, params->aifs, params->cw_min,
598		  params->cw_max, params->txop);
599
600	if (ath5k_hw_set_tx_queueprops(ah, queue, &qi)) {
601		ATH5K_ERR(ah,
602			  "Unable to update hardware queue %u!\n", queue);
603		ret = -EIO;
604	} else
605		ath5k_hw_reset_tx_queue(ah, queue);
606
607	mutex_unlock(&ah->lock);
608
609	return ret;
610}
611
612
613static u64
614ath5k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
615{
616	struct ath5k_hw *ah = hw->priv;
617
618	return ath5k_hw_get_tsf64(ah);
619}
620
621
622static void
623ath5k_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u64 tsf)
624{
625	struct ath5k_hw *ah = hw->priv;
626
627	ath5k_hw_set_tsf64(ah, tsf);
628}
629
630
631static void
632ath5k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
633{
634	struct ath5k_hw *ah = hw->priv;
635
636	/*
637	 * in IBSS mode we need to update the beacon timers too.
638	 * this will also reset the TSF if we call it with 0
639	 */
640	if (ah->opmode == NL80211_IFTYPE_ADHOC)
641		ath5k_beacon_update_timers(ah, 0);
642	else
643		ath5k_hw_reset_tsf(ah);
644}
645
646
647static int
648ath5k_get_survey(struct ieee80211_hw *hw, int idx, struct survey_info *survey)
649{
650	struct ath5k_hw *ah = hw->priv;
651	struct ieee80211_conf *conf = &hw->conf;
652	struct ath_common *common = ath5k_hw_common(ah);
653	struct ath_cycle_counters *cc = &common->cc_survey;
654	unsigned int div = common->clockrate * 1000;
655
656	if (idx != 0)
657		return -ENOENT;
658
659	spin_lock_bh(&common->cc_lock);
660	ath_hw_cycle_counters_update(common);
661	if (cc->cycles > 0) {
662		ah->survey.time += cc->cycles / div;
663		ah->survey.time_busy += cc->rx_busy / div;
664		ah->survey.time_rx += cc->rx_frame / div;
665		ah->survey.time_tx += cc->tx_frame / div;
666	}
667	memset(cc, 0, sizeof(*cc));
668	spin_unlock_bh(&common->cc_lock);
669
670	memcpy(survey, &ah->survey, sizeof(*survey));
671
672	survey->channel = conf->chandef.chan;
673	survey->noise = ah->ah_noise_floor;
674	survey->filled = SURVEY_INFO_NOISE_DBM |
675			SURVEY_INFO_IN_USE |
676			SURVEY_INFO_TIME |
677			SURVEY_INFO_TIME_BUSY |
678			SURVEY_INFO_TIME_RX |
679			SURVEY_INFO_TIME_TX;
680
681	return 0;
682}
683
684
685/**
686 * ath5k_set_coverage_class - Set IEEE 802.11 coverage class
687 *
688 * @hw: struct ieee80211_hw pointer
689 * @coverage_class: IEEE 802.11 coverage class number
690 *
691 * Mac80211 callback. Sets slot time, ACK timeout and CTS timeout for given
692 * coverage class. The values are persistent, they are restored after device
693 * reset.
694 */
695static void
696ath5k_set_coverage_class(struct ieee80211_hw *hw, s16 coverage_class)
697{
698	struct ath5k_hw *ah = hw->priv;
699
700	mutex_lock(&ah->lock);
701	ath5k_hw_set_coverage_class(ah, coverage_class);
702	mutex_unlock(&ah->lock);
703}
704
705
706static int
707ath5k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
708{
709	struct ath5k_hw *ah = hw->priv;
710
711	if (tx_ant == 1 && rx_ant == 1)
712		ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_FIXED_A);
713	else if (tx_ant == 2 && rx_ant == 2)
714		ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_FIXED_B);
715	else if ((tx_ant & 3) == 3 && (rx_ant & 3) == 3)
716		ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_DEFAULT);
717	else
718		return -EINVAL;
719	return 0;
720}
721
722
723static int
724ath5k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
725{
726	struct ath5k_hw *ah = hw->priv;
727
728	switch (ah->ah_ant_mode) {
729	case AR5K_ANTMODE_FIXED_A:
730		*tx_ant = 1; *rx_ant = 1; break;
731	case AR5K_ANTMODE_FIXED_B:
732		*tx_ant = 2; *rx_ant = 2; break;
733	case AR5K_ANTMODE_DEFAULT:
734		*tx_ant = 3; *rx_ant = 3; break;
735	}
736	return 0;
737}
738
739
740static void ath5k_get_ringparam(struct ieee80211_hw *hw,
741				u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max)
742{
743	struct ath5k_hw *ah = hw->priv;
744
745	*tx = ah->txqs[AR5K_TX_QUEUE_ID_DATA_MIN].txq_max;
746
747	*tx_max = ATH5K_TXQ_LEN_MAX;
748	*rx = *rx_max = ATH_RXBUF;
749}
750
751
752static int ath5k_set_ringparam(struct ieee80211_hw *hw, u32 tx, u32 rx)
753{
754	struct ath5k_hw *ah = hw->priv;
755	u16 qnum;
756
757	/* only support setting tx ring size for now */
758	if (rx != ATH_RXBUF)
759		return -EINVAL;
760
761	/* restrict tx ring size min/max */
762	if (!tx || tx > ATH5K_TXQ_LEN_MAX)
763		return -EINVAL;
764
765	for (qnum = 0; qnum < ARRAY_SIZE(ah->txqs); qnum++) {
766		if (!ah->txqs[qnum].setup)
767			continue;
768		if (ah->txqs[qnum].qnum < AR5K_TX_QUEUE_ID_DATA_MIN ||
769		    ah->txqs[qnum].qnum > AR5K_TX_QUEUE_ID_DATA_MAX)
770			continue;
771
772		ah->txqs[qnum].txq_max = tx;
773		if (ah->txqs[qnum].txq_len >= ah->txqs[qnum].txq_max)
774			ieee80211_stop_queue(hw, ah->txqs[qnum].qnum);
775	}
776
777	return 0;
778}
779
780
781const struct ieee80211_ops ath5k_hw_ops = {
782	.tx			= ath5k_tx,
783	.wake_tx_queue		= ieee80211_handle_wake_tx_queue,
784	.start			= ath5k_start,
785	.stop			= ath5k_stop,
786	.add_interface		= ath5k_add_interface,
787	/* .change_interface	= not implemented */
788	.remove_interface	= ath5k_remove_interface,
789	.config			= ath5k_config,
790	.bss_info_changed	= ath5k_bss_info_changed,
791	.prepare_multicast	= ath5k_prepare_multicast,
792	.configure_filter	= ath5k_configure_filter,
793	/* .set_tim		= not implemented */
794	.set_key		= ath5k_set_key,
795	/* .update_tkip_key	= not implemented */
796	/* .hw_scan		= not implemented */
797	.sw_scan_start		= ath5k_sw_scan_start,
798	.sw_scan_complete	= ath5k_sw_scan_complete,
799	.get_stats		= ath5k_get_stats,
800	/* .set_frag_threshold	= not implemented */
801	/* .set_rts_threshold	= not implemented */
802	/* .sta_add		= not implemented */
803	/* .sta_remove		= not implemented */
804	/* .sta_notify		= not implemented */
805	.conf_tx		= ath5k_conf_tx,
806	.get_tsf		= ath5k_get_tsf,
807	.set_tsf		= ath5k_set_tsf,
808	.reset_tsf		= ath5k_reset_tsf,
809	/* .tx_last_beacon	= not implemented */
810	/* .ampdu_action	= not needed */
811	.get_survey		= ath5k_get_survey,
812	.set_coverage_class	= ath5k_set_coverage_class,
813	/* .rfkill_poll		= not implemented */
814	/* .flush		= not implemented */
815	/* .channel_switch	= not implemented */
816	/* .napi_poll		= not implemented */
817	.set_antenna		= ath5k_set_antenna,
818	.get_antenna		= ath5k_get_antenna,
819	.set_ringparam		= ath5k_set_ringparam,
820	.get_ringparam		= ath5k_get_ringparam,
821};