1/*
2 * Copyright (c) 2010-2011 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#include <linux/dma-mapping.h>
18#include <linux/slab.h>
19
20#include "ath9k.h"
21#include "mci.h"
22
23static const u8 ath_mci_duty_cycle[] = { 55, 50, 60, 70, 80, 85, 90, 95, 98 };
24
25static struct ath_mci_profile_info*
26ath_mci_find_profile(struct ath_mci_profile *mci,
27		     struct ath_mci_profile_info *info)
28{
29	struct ath_mci_profile_info *entry;
30
31	if (list_empty(&mci->info))
32		return NULL;
33
34	list_for_each_entry(entry, &mci->info, list) {
35		if (entry->conn_handle == info->conn_handle)
36			return entry;
37	}
38	return NULL;
39}
40
41static bool ath_mci_add_profile(struct ath_common *common,
42				struct ath_mci_profile *mci,
43				struct ath_mci_profile_info *info)
44{
45	struct ath_mci_profile_info *entry;
46	u8 voice_priority[] = { 110, 110, 110, 112, 110, 110, 114, 116, 118 };
47
48	if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
49	    (info->type == MCI_GPM_COEX_PROFILE_VOICE))
50		return false;
51
52	if (((NUM_PROF(mci) - mci->num_sco) == ATH_MCI_MAX_ACL_PROFILE) &&
53	    (info->type != MCI_GPM_COEX_PROFILE_VOICE))
54		return false;
55
56	entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
57	if (!entry)
58		return false;
59
60	memcpy(entry, info, 10);
61	INC_PROF(mci, info);
62	list_add_tail(&entry->list, &mci->info);
63	if (info->type == MCI_GPM_COEX_PROFILE_VOICE) {
64		if (info->voice_type < sizeof(voice_priority))
65			mci->voice_priority = voice_priority[info->voice_type];
66		else
67			mci->voice_priority = 110;
68	}
69
70	return true;
71}
72
73static void ath_mci_del_profile(struct ath_common *common,
74				struct ath_mci_profile *mci,
75				struct ath_mci_profile_info *entry)
76{
77	if (!entry)
78		return;
79
80	DEC_PROF(mci, entry);
81	list_del(&entry->list);
82	kfree(entry);
83}
84
85void ath_mci_flush_profile(struct ath_mci_profile *mci)
86{
87	struct ath_mci_profile_info *info, *tinfo;
88
89	mci->aggr_limit = 0;
90	mci->num_mgmt = 0;
91
92	if (list_empty(&mci->info))
93		return;
94
95	list_for_each_entry_safe(info, tinfo, &mci->info, list) {
96		list_del(&info->list);
97		DEC_PROF(mci, info);
98		kfree(info);
99	}
100}
101
102static void ath_mci_adjust_aggr_limit(struct ath_btcoex *btcoex)
103{
104	struct ath_mci_profile *mci = &btcoex->mci;
105	u32 wlan_airtime = btcoex->btcoex_period *
106				(100 - btcoex->duty_cycle) / 100;
107
108	/*
109	 * Scale: wlan_airtime is in ms, aggr_limit is in 0.25 ms.
110	 * When wlan_airtime is less than 4ms, aggregation limit has to be
111	 * adjusted half of wlan_airtime to ensure that the aggregation can fit
112	 * without collision with BT traffic.
113	 */
114	if ((wlan_airtime <= 4) &&
115	    (!mci->aggr_limit || (mci->aggr_limit > (2 * wlan_airtime))))
116		mci->aggr_limit = 2 * wlan_airtime;
117}
118
119static void ath_mci_update_scheme(struct ath_softc *sc)
120{
121	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
122	struct ath_btcoex *btcoex = &sc->btcoex;
123	struct ath_mci_profile *mci = &btcoex->mci;
124	struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
125	struct ath_mci_profile_info *info;
126	u32 num_profile = NUM_PROF(mci);
127
128	if (mci_hw->config & ATH_MCI_CONFIG_DISABLE_TUNING)
129		goto skip_tuning;
130
131	mci->aggr_limit = 0;
132	btcoex->duty_cycle = ath_mci_duty_cycle[num_profile];
133	btcoex->btcoex_period = ATH_MCI_DEF_BT_PERIOD;
134	if (NUM_PROF(mci))
135		btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
136	else
137		btcoex->bt_stomp_type = mci->num_mgmt ? ATH_BTCOEX_STOMP_ALL :
138							ATH_BTCOEX_STOMP_LOW;
139
140	if (num_profile == 1) {
141		info = list_first_entry(&mci->info,
142					struct ath_mci_profile_info,
143					list);
144		if (mci->num_sco) {
145			if (info->T == 12)
146				mci->aggr_limit = 8;
147			else if (info->T == 6) {
148				mci->aggr_limit = 6;
149				btcoex->duty_cycle = 30;
150			} else
151				mci->aggr_limit = 6;
152			ath_dbg(common, MCI,
153				"Single SCO, aggregation limit %d 1/4 ms\n",
154				mci->aggr_limit);
155		} else if (mci->num_pan || mci->num_other_acl) {
156			/*
157			 * For single PAN/FTP profile, allocate 35% for BT
158			 * to improve WLAN throughput.
159			 */
160			btcoex->duty_cycle = AR_SREV_9565(sc->sc_ah) ? 40 : 35;
161			btcoex->btcoex_period = 53;
162			ath_dbg(common, MCI,
163				"Single PAN/FTP bt period %d ms dutycycle %d\n",
164				btcoex->duty_cycle, btcoex->btcoex_period);
165		} else if (mci->num_hid) {
166			btcoex->duty_cycle = 30;
167			mci->aggr_limit = 6;
168			ath_dbg(common, MCI,
169				"Multiple attempt/timeout single HID "
170				"aggregation limit 1.5 ms dutycycle 30%%\n");
171		}
172	} else if (num_profile == 2) {
173		if (mci->num_hid == 2)
174			btcoex->duty_cycle = 30;
175		mci->aggr_limit = 6;
176		ath_dbg(common, MCI,
177			"Two BT profiles aggr limit 1.5 ms dutycycle %d%%\n",
178			btcoex->duty_cycle);
179	} else if (num_profile >= 3) {
180		mci->aggr_limit = 4;
181		ath_dbg(common, MCI,
182			"Three or more profiles aggregation limit 1 ms\n");
183	}
184
185skip_tuning:
186	if (IS_CHAN_2GHZ(sc->sc_ah->curchan)) {
187		if (IS_CHAN_HT(sc->sc_ah->curchan))
188			ath_mci_adjust_aggr_limit(btcoex);
189		else
190			btcoex->btcoex_period >>= 1;
191	}
192
193	ath9k_btcoex_timer_pause(sc);
194	ath9k_hw_btcoex_disable(sc->sc_ah);
195
196	if (IS_CHAN_5GHZ(sc->sc_ah->curchan))
197		return;
198
199	btcoex->duty_cycle += (mci->num_bdr ? ATH_MCI_BDR_DUTY_CYCLE : 0);
200	if (btcoex->duty_cycle > ATH_MCI_MAX_DUTY_CYCLE)
201		btcoex->duty_cycle = ATH_MCI_MAX_DUTY_CYCLE;
202
203	btcoex->btcoex_no_stomp =  btcoex->btcoex_period *
204		(100 - btcoex->duty_cycle) / 100;
205
206	ath9k_hw_btcoex_enable(sc->sc_ah);
207	ath9k_btcoex_timer_resume(sc);
208}
209
210static void ath_mci_cal_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
211{
212	struct ath_hw *ah = sc->sc_ah;
213	struct ath_common *common = ath9k_hw_common(ah);
214	struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
215	u32 payload[4] = {0, 0, 0, 0};
216
217	switch (opcode) {
218	case MCI_GPM_BT_CAL_REQ:
219		if (mci_hw->bt_state == MCI_BT_AWAKE) {
220			mci_hw->bt_state = MCI_BT_CAL_START;
221			ath9k_queue_reset(sc, RESET_TYPE_MCI);
222		}
223		ath_dbg(common, MCI, "MCI State : %d\n", mci_hw->bt_state);
224		break;
225	case MCI_GPM_BT_CAL_GRANT:
226		MCI_GPM_SET_CAL_TYPE(payload, MCI_GPM_WLAN_CAL_DONE);
227		ar9003_mci_send_message(sc->sc_ah, MCI_GPM, 0, payload,
228					16, false, true);
229		break;
230	default:
231		ath_dbg(common, MCI, "Unknown GPM CAL message\n");
232		break;
233	}
234}
235
236static void ath9k_mci_work(struct work_struct *work)
237{
238	struct ath_softc *sc = container_of(work, struct ath_softc, mci_work);
239
240	ath_mci_update_scheme(sc);
241}
242
243static void ath_mci_update_stomp_txprio(u8 cur_txprio, u8 *stomp_prio)
244{
245	if (cur_txprio < stomp_prio[ATH_BTCOEX_STOMP_NONE])
246		stomp_prio[ATH_BTCOEX_STOMP_NONE] = cur_txprio;
247
248	if (cur_txprio > stomp_prio[ATH_BTCOEX_STOMP_ALL])
249		stomp_prio[ATH_BTCOEX_STOMP_ALL] = cur_txprio;
250
251	if ((cur_txprio > ATH_MCI_HI_PRIO) &&
252	    (cur_txprio < stomp_prio[ATH_BTCOEX_STOMP_LOW]))
253		stomp_prio[ATH_BTCOEX_STOMP_LOW] = cur_txprio;
254}
255
256static void ath_mci_set_concur_txprio(struct ath_softc *sc)
257{
258	struct ath_btcoex *btcoex = &sc->btcoex;
259	struct ath_mci_profile *mci = &btcoex->mci;
260	u8 stomp_txprio[ATH_BTCOEX_STOMP_MAX];
261
262	memset(stomp_txprio, 0, sizeof(stomp_txprio));
263	if (mci->num_mgmt) {
264		stomp_txprio[ATH_BTCOEX_STOMP_ALL] = ATH_MCI_INQUIRY_PRIO;
265		if (!mci->num_pan && !mci->num_other_acl)
266			stomp_txprio[ATH_BTCOEX_STOMP_NONE] =
267				ATH_MCI_INQUIRY_PRIO;
268	} else {
269		u8 prof_prio[] = { 50, 90, 94, 52 };/* RFCOMM, A2DP, HID, PAN */
270
271		stomp_txprio[ATH_BTCOEX_STOMP_LOW] =
272		stomp_txprio[ATH_BTCOEX_STOMP_NONE] = 0xff;
273
274		if (mci->num_sco)
275			ath_mci_update_stomp_txprio(mci->voice_priority,
276						    stomp_txprio);
277		if (mci->num_other_acl)
278			ath_mci_update_stomp_txprio(prof_prio[0], stomp_txprio);
279		if (mci->num_a2dp)
280			ath_mci_update_stomp_txprio(prof_prio[1], stomp_txprio);
281		if (mci->num_hid)
282			ath_mci_update_stomp_txprio(prof_prio[2], stomp_txprio);
283		if (mci->num_pan)
284			ath_mci_update_stomp_txprio(prof_prio[3], stomp_txprio);
285
286		if (stomp_txprio[ATH_BTCOEX_STOMP_NONE] == 0xff)
287			stomp_txprio[ATH_BTCOEX_STOMP_NONE] = 0;
288
289		if (stomp_txprio[ATH_BTCOEX_STOMP_LOW] == 0xff)
290			stomp_txprio[ATH_BTCOEX_STOMP_LOW] = 0;
291	}
292	ath9k_hw_btcoex_set_concur_txprio(sc->sc_ah, stomp_txprio);
293}
294
295static u8 ath_mci_process_profile(struct ath_softc *sc,
296				  struct ath_mci_profile_info *info)
297{
298	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
299	struct ath_btcoex *btcoex = &sc->btcoex;
300	struct ath_mci_profile *mci = &btcoex->mci;
301	struct ath_mci_profile_info *entry = NULL;
302
303	entry = ath_mci_find_profile(mci, info);
304	if (entry) {
305		/*
306		 * Two MCI interrupts are generated while connecting to
307		 * headset and A2DP profile, but only one MCI interrupt
308		 * is generated with last added profile type while disconnecting
309		 * both profiles.
310		 * So while adding second profile type decrement
311		 * the first one.
312		 */
313		if (entry->type != info->type) {
314			DEC_PROF(mci, entry);
315			INC_PROF(mci, info);
316		}
317		memcpy(entry, info, 10);
318	}
319
320	if (info->start) {
321		if (!entry && !ath_mci_add_profile(common, mci, info))
322			return 0;
323	} else
324		ath_mci_del_profile(common, mci, entry);
325
326	ath_mci_set_concur_txprio(sc);
327	return 1;
328}
329
330static u8 ath_mci_process_status(struct ath_softc *sc,
331				 struct ath_mci_profile_status *status)
332{
333	struct ath_btcoex *btcoex = &sc->btcoex;
334	struct ath_mci_profile *mci = &btcoex->mci;
335	struct ath_mci_profile_info info;
336	int i = 0, old_num_mgmt = mci->num_mgmt;
337
338	/* Link status type are not handled */
339	if (status->is_link)
340		return 0;
341
342	info.conn_handle = status->conn_handle;
343	if (ath_mci_find_profile(mci, &info))
344		return 0;
345
346	if (status->conn_handle >= ATH_MCI_MAX_PROFILE)
347		return 0;
348
349	if (status->is_critical)
350		__set_bit(status->conn_handle, mci->status);
351	else
352		__clear_bit(status->conn_handle, mci->status);
353
354	mci->num_mgmt = 0;
355	do {
356		if (test_bit(i, mci->status))
357			mci->num_mgmt++;
358	} while (++i < ATH_MCI_MAX_PROFILE);
359
360	ath_mci_set_concur_txprio(sc);
361	if (old_num_mgmt != mci->num_mgmt)
362		return 1;
363
364	return 0;
365}
366
367static void ath_mci_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
368{
369	struct ath_hw *ah = sc->sc_ah;
370	struct ath_mci_profile_info profile_info;
371	struct ath_mci_profile_status profile_status;
372	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
373	u8 major, minor, update_scheme = 0;
374	u32 seq_num;
375
376	if (ar9003_mci_state(ah, MCI_STATE_NEED_FLUSH_BT_INFO) &&
377	    ar9003_mci_state(ah, MCI_STATE_ENABLE)) {
378		ath_dbg(common, MCI, "(MCI) Need to flush BT profiles\n");
379		ath_mci_flush_profile(&sc->btcoex.mci);
380		ar9003_mci_state(ah, MCI_STATE_SEND_STATUS_QUERY);
381	}
382
383	switch (opcode) {
384	case MCI_GPM_COEX_VERSION_QUERY:
385		ar9003_mci_state(ah, MCI_STATE_SEND_WLAN_COEX_VERSION);
386		break;
387	case MCI_GPM_COEX_VERSION_RESPONSE:
388		major = *(rx_payload + MCI_GPM_COEX_B_MAJOR_VERSION);
389		minor = *(rx_payload + MCI_GPM_COEX_B_MINOR_VERSION);
390		ar9003_mci_set_bt_version(ah, major, minor);
391		break;
392	case MCI_GPM_COEX_STATUS_QUERY:
393		ar9003_mci_send_wlan_channels(ah);
394		break;
395	case MCI_GPM_COEX_BT_PROFILE_INFO:
396		memcpy(&profile_info,
397		       (rx_payload + MCI_GPM_COEX_B_PROFILE_TYPE), 10);
398
399		if ((profile_info.type == MCI_GPM_COEX_PROFILE_UNKNOWN) ||
400		    (profile_info.type >= MCI_GPM_COEX_PROFILE_MAX)) {
401			ath_dbg(common, MCI,
402				"Illegal profile type = %d, state = %d\n",
403				profile_info.type,
404				profile_info.start);
405			break;
406		}
407
408		update_scheme += ath_mci_process_profile(sc, &profile_info);
409		break;
410	case MCI_GPM_COEX_BT_STATUS_UPDATE:
411		profile_status.is_link = *(rx_payload +
412					   MCI_GPM_COEX_B_STATUS_TYPE);
413		profile_status.conn_handle = *(rx_payload +
414					       MCI_GPM_COEX_B_STATUS_LINKID);
415		profile_status.is_critical = *(rx_payload +
416					       MCI_GPM_COEX_B_STATUS_STATE);
417
418		seq_num = *((u32 *)(rx_payload + 12));
419		ath_dbg(common, MCI,
420			"BT_Status_Update: is_link=%d, linkId=%d, state=%d, SEQ=%u\n",
421			profile_status.is_link, profile_status.conn_handle,
422			profile_status.is_critical, seq_num);
423
424		update_scheme += ath_mci_process_status(sc, &profile_status);
425		break;
426	default:
427		ath_dbg(common, MCI, "Unknown GPM COEX message = 0x%02x\n", opcode);
428		break;
429	}
430	if (update_scheme)
431		ieee80211_queue_work(sc->hw, &sc->mci_work);
432}
433
434int ath_mci_setup(struct ath_softc *sc)
435{
436	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
437	struct ath_mci_coex *mci = &sc->mci_coex;
438	struct ath_mci_buf *buf = &mci->sched_buf;
439	int ret;
440
441	buf->bf_addr = dmam_alloc_coherent(sc->dev,
442				  ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
443				  &buf->bf_paddr, GFP_KERNEL);
444
445	if (buf->bf_addr == NULL) {
446		ath_dbg(common, FATAL, "MCI buffer alloc failed\n");
447		return -ENOMEM;
448	}
449
450	memset(buf->bf_addr, MCI_GPM_RSVD_PATTERN,
451	       ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE);
452
453	mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE;
454
455	mci->gpm_buf.bf_len = ATH_MCI_GPM_BUF_SIZE;
456	mci->gpm_buf.bf_addr = (u8 *)mci->sched_buf.bf_addr + mci->sched_buf.bf_len;
457	mci->gpm_buf.bf_paddr = mci->sched_buf.bf_paddr + mci->sched_buf.bf_len;
458
459	ret = ar9003_mci_setup(sc->sc_ah, mci->gpm_buf.bf_paddr,
460			       mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4),
461			       mci->sched_buf.bf_paddr);
462	if (ret) {
463		ath_err(common, "Failed to initialize MCI\n");
464		return ret;
465	}
466
467	INIT_WORK(&sc->mci_work, ath9k_mci_work);
468	ath_dbg(common, MCI, "MCI Initialized\n");
469
470	return 0;
471}
472
473void ath_mci_cleanup(struct ath_softc *sc)
474{
475	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
476	struct ath_hw *ah = sc->sc_ah;
477
478	ar9003_mci_cleanup(ah);
479
480	ath_dbg(common, MCI, "MCI De-Initialized\n");
481}
482
483void ath_mci_intr(struct ath_softc *sc)
484{
485	struct ath_mci_coex *mci = &sc->mci_coex;
486	struct ath_hw *ah = sc->sc_ah;
487	struct ath_common *common = ath9k_hw_common(ah);
488	struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
489	u32 mci_int, mci_int_rxmsg;
490	u32 offset, subtype, opcode;
491	u32 *pgpm;
492	u32 more_data = MCI_GPM_MORE;
493	bool skip_gpm = false;
494
495	ar9003_mci_get_interrupt(sc->sc_ah, &mci_int, &mci_int_rxmsg);
496
497	if (ar9003_mci_state(ah, MCI_STATE_ENABLE) == 0) {
498		ar9003_mci_state(ah, MCI_STATE_INIT_GPM_OFFSET);
499		return;
500	}
501
502	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE) {
503		u32 payload[4] = { 0xffffffff, 0xffffffff,
504				   0xffffffff, 0xffffff00};
505
506		/*
507		 * The following REMOTE_RESET and SYS_WAKING used to sent
508		 * only when BT wake up. Now they are always sent, as a
509		 * recovery method to reset BT MCI's RX alignment.
510		 */
511		ar9003_mci_send_message(ah, MCI_REMOTE_RESET, 0,
512					payload, 16, true, false);
513		ar9003_mci_send_message(ah, MCI_SYS_WAKING, 0,
514					NULL, 0, true, false);
515
516		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE;
517		ar9003_mci_state(ah, MCI_STATE_RESET_REQ_WAKE);
518
519		/*
520		 * always do this for recovery and 2G/5G toggling and LNA_TRANS
521		 */
522		ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE);
523	}
524
525	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING) {
526		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING;
527
528		if ((mci_hw->bt_state == MCI_BT_SLEEP) &&
529		    (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP) !=
530		     MCI_BT_SLEEP))
531			ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE);
532	}
533
534	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) {
535		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING;
536
537		if ((mci_hw->bt_state == MCI_BT_AWAKE) &&
538		    (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP) !=
539		     MCI_BT_AWAKE))
540			mci_hw->bt_state = MCI_BT_SLEEP;
541	}
542
543	if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
544	    (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
545		ar9003_mci_state(ah, MCI_STATE_RECOVER_RX);
546		skip_gpm = true;
547	}
548
549	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO) {
550		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO;
551		offset = ar9003_mci_state(ah, MCI_STATE_LAST_SCHD_MSG_OFFSET);
552	}
553
554	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_GPM) {
555		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_GPM;
556
557		while (more_data == MCI_GPM_MORE) {
558			if (test_bit(ATH_OP_HW_RESET, &common->op_flags))
559				return;
560
561			pgpm = mci->gpm_buf.bf_addr;
562			offset = ar9003_mci_get_next_gpm_offset(ah, &more_data);
563
564			if (offset == MCI_GPM_INVALID)
565				break;
566
567			pgpm += (offset >> 2);
568
569			/*
570			 * The first dword is timer.
571			 * The real data starts from 2nd dword.
572			 */
573			subtype = MCI_GPM_TYPE(pgpm);
574			opcode = MCI_GPM_OPCODE(pgpm);
575
576			if (skip_gpm)
577				goto recycle;
578
579			if (MCI_GPM_IS_CAL_TYPE(subtype)) {
580				ath_mci_cal_msg(sc, subtype, (u8 *)pgpm);
581			} else {
582				switch (subtype) {
583				case MCI_GPM_COEX_AGENT:
584					ath_mci_msg(sc, opcode, (u8 *)pgpm);
585					break;
586				default:
587					break;
588				}
589			}
590		recycle:
591			MCI_GPM_RECYCLE(pgpm);
592		}
593	}
594
595	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_HW_MSG_MASK) {
596		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL)
597			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL;
598
599		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_INFO)
600			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_INFO;
601
602		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO) {
603			int value_dbm = MS(mci_hw->cont_status,
604					   AR_MCI_CONT_RSSI_POWER);
605
606			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_INFO;
607
608			ath_dbg(common, MCI,
609				"MCI CONT_INFO: (%s) pri = %d pwr = %d dBm\n",
610				MS(mci_hw->cont_status, AR_MCI_CONT_TXRX) ?
611				"tx" : "rx",
612				MS(mci_hw->cont_status, AR_MCI_CONT_PRIORITY),
613				value_dbm);
614		}
615
616		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_NACK)
617			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_NACK;
618
619		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_RST)
620			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_RST;
621	}
622
623	if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
624	    (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
625		mci_int &= ~(AR_MCI_INTERRUPT_RX_INVALID_HDR |
626			     AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT);
627		ath_mci_msg(sc, MCI_GPM_COEX_NOOP, NULL);
628	}
629}
630
631void ath_mci_enable(struct ath_softc *sc)
632{
633	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
634
635	if (!common->btcoex_enabled)
636		return;
637
638	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
639		sc->sc_ah->imask |= ATH9K_INT_MCI;
640}
641
642void ath9k_mci_update_wlan_channels(struct ath_softc *sc, bool allow_all)
643{
644	struct ath_hw *ah = sc->sc_ah;
645	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
646	struct ath9k_channel *chan = ah->curchan;
647	u32 channelmap[] = {0x00000000, 0xffff0000, 0xffffffff, 0x7fffffff};
648	int i;
649	s16 chan_start, chan_end;
650	u16 wlan_chan;
651
652	if (!chan || !IS_CHAN_2GHZ(chan))
653		return;
654
655	if (allow_all)
656		goto send_wlan_chan;
657
658	wlan_chan = chan->channel - 2402;
659
660	chan_start = wlan_chan - 10;
661	chan_end = wlan_chan + 10;
662
663	if (IS_CHAN_HT40PLUS(chan))
664		chan_end += 20;
665	else if (IS_CHAN_HT40MINUS(chan))
666		chan_start -= 20;
667
668	/* adjust side band */
669	chan_start -= 7;
670	chan_end += 7;
671
672	if (chan_start <= 0)
673		chan_start = 0;
674	if (chan_end >= ATH_MCI_NUM_BT_CHANNELS)
675		chan_end = ATH_MCI_NUM_BT_CHANNELS - 1;
676
677	ath_dbg(ath9k_hw_common(ah), MCI,
678		"WLAN current channel %d mask BT channel %d - %d\n",
679		wlan_chan, chan_start, chan_end);
680
681	for (i = chan_start; i < chan_end; i++)
682		MCI_GPM_CLR_CHANNEL_BIT(&channelmap, i);
683
684send_wlan_chan:
685	/* update and send wlan channels info to BT */
686	for (i = 0; i < 4; i++)
687		mci->wlan_channels[i] = channelmap[i];
688	ar9003_mci_send_wlan_channels(ah);
689	ar9003_mci_state(ah, MCI_STATE_SEND_VERSION_QUERY);
690}
691
692void ath9k_mci_set_txpower(struct ath_softc *sc, bool setchannel,
693			   bool concur_tx)
694{
695	struct ath_hw *ah = sc->sc_ah;
696	struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
697	bool old_concur_tx = mci_hw->concur_tx;
698
699	if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX)) {
700		mci_hw->concur_tx = false;
701		return;
702	}
703
704	if (!IS_CHAN_2GHZ(ah->curchan))
705		return;
706
707	if (setchannel) {
708		struct ath9k_hw_cal_data *caldata = &sc->cur_chan->caldata;
709		if (IS_CHAN_HT40PLUS(ah->curchan) &&
710		    (ah->curchan->channel > caldata->channel) &&
711		    (ah->curchan->channel <= caldata->channel + 20))
712			return;
713		if (IS_CHAN_HT40MINUS(ah->curchan) &&
714		    (ah->curchan->channel < caldata->channel) &&
715		    (ah->curchan->channel >= caldata->channel - 20))
716			return;
717		mci_hw->concur_tx = false;
718	} else
719		mci_hw->concur_tx = concur_tx;
720
721	if (old_concur_tx != mci_hw->concur_tx)
722		ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false);
723}
724
725static void ath9k_mci_stomp_audio(struct ath_softc *sc)
726{
727	struct ath_hw *ah = sc->sc_ah;
728	struct ath_btcoex *btcoex = &sc->btcoex;
729	struct ath_mci_profile *mci = &btcoex->mci;
730
731	if (!mci->num_sco && !mci->num_a2dp)
732		return;
733
734	if (ah->stats.avgbrssi > 25) {
735		btcoex->stomp_audio = 0;
736		return;
737	}
738
739	btcoex->stomp_audio++;
740}
741void ath9k_mci_update_rssi(struct ath_softc *sc)
742{
743	struct ath_hw *ah = sc->sc_ah;
744	struct ath_btcoex *btcoex = &sc->btcoex;
745	struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
746
747	ath9k_mci_stomp_audio(sc);
748
749	if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX))
750		return;
751
752	if (ah->stats.avgbrssi >= 40) {
753		if (btcoex->rssi_count < 0)
754			btcoex->rssi_count = 0;
755		if (++btcoex->rssi_count >= ATH_MCI_CONCUR_TX_SWITCH) {
756			btcoex->rssi_count = 0;
757			ath9k_mci_set_txpower(sc, false, true);
758		}
759	} else {
760		if (btcoex->rssi_count > 0)
761			btcoex->rssi_count = 0;
762		if (--btcoex->rssi_count <= -ATH_MCI_CONCUR_TX_SWITCH) {
763			btcoex->rssi_count = 0;
764			ath9k_mci_set_txpower(sc, false, false);
765		}
766	}
767}
768