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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / wireless / ath / ath9k / mci.c
blob39d46c203f6b78c1d9197887c09fc43950869b5f
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
23 static const u8 ath_mci_duty_cycle[] = { 55, 50, 60, 70, 80, 85, 90, 95, 98 };
24
25 static struct ath_mci_profile_info*
26 ath_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
41 static 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
73 static 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
85 void 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
102 static 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
119 static 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
185 skip_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
210 static 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
236 static 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
243 static 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
256 static 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
295 static 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
330 static 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
367 static 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
434 int 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 = 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
473 void 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
483 void 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 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
631 void 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
642 void 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
684 send_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
692 void 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
725 static 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 }
741 void 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 }
Linux with added FPC-III support