2 * Copyright (c) 2010-2011 Atheros Communications Inc.
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.
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.
17 #include <linux/dma-mapping.h>
18 #include <linux/slab.h>
23 static const u8 ath_mci_duty_cycle[] = { 55, 50, 60, 70, 80, 85, 90, 95, 98 };
25 static struct ath_mci_profile_info*
26 ath_mci_find_profile(struct ath_mci_profile *mci,
27 struct ath_mci_profile_info *info)
29 struct ath_mci_profile_info *entry;
31 if (list_empty(&mci->info))
34 list_for_each_entry(entry, &mci->info, list) {
35 if (entry->conn_handle == info->conn_handle)
41 static bool ath_mci_add_profile(struct ath_common *common,
42 struct ath_mci_profile *mci,
43 struct ath_mci_profile_info *info)
45 struct ath_mci_profile_info *entry;
47 if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
48 (info->type == MCI_GPM_COEX_PROFILE_VOICE))
51 if (((NUM_PROF(mci) - mci->num_sco) == ATH_MCI_MAX_ACL_PROFILE) &&
52 (info->type != MCI_GPM_COEX_PROFILE_VOICE))
55 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
59 memcpy(entry, info, 10);
61 list_add_tail(&entry->list, &mci->info);
66 static void ath_mci_del_profile(struct ath_common *common,
67 struct ath_mci_profile *mci,
68 struct ath_mci_profile_info *entry)
74 list_del(&entry->list);
78 void ath_mci_flush_profile(struct ath_mci_profile *mci)
80 struct ath_mci_profile_info *info, *tinfo;
84 if (list_empty(&mci->info))
87 list_for_each_entry_safe(info, tinfo, &mci->info, list) {
88 list_del(&info->list);
94 static void ath_mci_adjust_aggr_limit(struct ath_btcoex *btcoex)
96 struct ath_mci_profile *mci = &btcoex->mci;
97 u32 wlan_airtime = btcoex->btcoex_period *
98 (100 - btcoex->duty_cycle) / 100;
101 * Scale: wlan_airtime is in ms, aggr_limit is in 0.25 ms.
102 * When wlan_airtime is less than 4ms, aggregation limit has to be
103 * adjusted half of wlan_airtime to ensure that the aggregation can fit
104 * without collision with BT traffic.
106 if ((wlan_airtime <= 4) &&
107 (!mci->aggr_limit || (mci->aggr_limit > (2 * wlan_airtime))))
108 mci->aggr_limit = 2 * wlan_airtime;
111 static void ath_mci_update_scheme(struct ath_softc *sc)
113 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
114 struct ath_btcoex *btcoex = &sc->btcoex;
115 struct ath_mci_profile *mci = &btcoex->mci;
116 struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
117 struct ath_mci_profile_info *info;
118 u32 num_profile = NUM_PROF(mci);
120 if (mci_hw->config & ATH_MCI_CONFIG_DISABLE_TUNING)
123 btcoex->duty_cycle = ath_mci_duty_cycle[num_profile];
125 if (num_profile == 1) {
126 info = list_first_entry(&mci->info,
127 struct ath_mci_profile_info,
132 else if (info->T == 6) {
134 btcoex->duty_cycle = 30;
137 "Single SCO, aggregation limit %d 1/4 ms\n",
139 } else if (mci->num_pan || mci->num_other_acl) {
141 * For single PAN/FTP profile, allocate 35% for BT
142 * to improve WLAN throughput.
144 btcoex->duty_cycle = 35;
145 btcoex->btcoex_period = 53;
147 "Single PAN/FTP bt period %d ms dutycycle %d\n",
148 btcoex->duty_cycle, btcoex->btcoex_period);
149 } else if (mci->num_hid) {
150 btcoex->duty_cycle = 30;
153 "Multiple attempt/timeout single HID "
154 "aggregation limit 1.5 ms dutycycle 30%%\n");
156 } else if (num_profile == 2) {
157 if (mci->num_hid == 2)
158 btcoex->duty_cycle = 30;
161 "Two BT profiles aggr limit 1.5 ms dutycycle %d%%\n",
163 } else if (num_profile >= 3) {
166 "Three or more profiles aggregation limit 1 ms\n");
170 if (IS_CHAN_2GHZ(sc->sc_ah->curchan)) {
171 if (IS_CHAN_HT(sc->sc_ah->curchan))
172 ath_mci_adjust_aggr_limit(btcoex);
174 btcoex->btcoex_period >>= 1;
177 ath9k_hw_btcoex_disable(sc->sc_ah);
178 ath9k_btcoex_timer_pause(sc);
180 if (IS_CHAN_5GHZ(sc->sc_ah->curchan))
183 btcoex->duty_cycle += (mci->num_bdr ? ATH_MCI_BDR_DUTY_CYCLE : 0);
184 if (btcoex->duty_cycle > ATH_MCI_MAX_DUTY_CYCLE)
185 btcoex->duty_cycle = ATH_MCI_MAX_DUTY_CYCLE;
187 btcoex->btcoex_no_stomp = btcoex->btcoex_period * 1000 *
188 (100 - btcoex->duty_cycle) / 100;
190 ath9k_hw_btcoex_enable(sc->sc_ah);
191 ath9k_btcoex_timer_resume(sc);
194 static void ath_mci_cal_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
196 struct ath_hw *ah = sc->sc_ah;
197 struct ath_common *common = ath9k_hw_common(ah);
198 u32 payload[4] = {0, 0, 0, 0};
201 case MCI_GPM_BT_CAL_REQ:
202 if (ar9003_mci_state(ah, MCI_STATE_BT, NULL) == MCI_BT_AWAKE) {
203 ar9003_mci_state(ah, MCI_STATE_SET_BT_CAL_START, NULL);
204 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
206 ath_dbg(common, MCI, "MCI State mismatch: %d\n",
207 ar9003_mci_state(ah, MCI_STATE_BT, NULL));
210 case MCI_GPM_BT_CAL_DONE:
211 ar9003_mci_state(ah, MCI_STATE_BT, NULL);
213 case MCI_GPM_BT_CAL_GRANT:
214 MCI_GPM_SET_CAL_TYPE(payload, MCI_GPM_WLAN_CAL_DONE);
215 ar9003_mci_send_message(sc->sc_ah, MCI_GPM, 0, payload,
219 ath_dbg(common, MCI, "Unknown GPM CAL message\n");
224 static void ath9k_mci_work(struct work_struct *work)
226 struct ath_softc *sc = container_of(work, struct ath_softc, mci_work);
228 ath_mci_update_scheme(sc);
231 static void ath_mci_process_profile(struct ath_softc *sc,
232 struct ath_mci_profile_info *info)
234 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
235 struct ath_btcoex *btcoex = &sc->btcoex;
236 struct ath_mci_profile *mci = &btcoex->mci;
237 struct ath_mci_profile_info *entry = NULL;
239 entry = ath_mci_find_profile(mci, info);
241 memcpy(entry, info, 10);
244 if (!entry && !ath_mci_add_profile(common, mci, info))
247 ath_mci_del_profile(common, mci, entry);
249 btcoex->btcoex_period = ATH_MCI_DEF_BT_PERIOD;
250 mci->aggr_limit = mci->num_sco ? 6 : 0;
252 btcoex->duty_cycle = ath_mci_duty_cycle[NUM_PROF(mci)];
254 btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
256 btcoex->bt_stomp_type = mci->num_mgmt ? ATH_BTCOEX_STOMP_ALL :
257 ATH_BTCOEX_STOMP_LOW;
259 ieee80211_queue_work(sc->hw, &sc->mci_work);
262 static void ath_mci_process_status(struct ath_softc *sc,
263 struct ath_mci_profile_status *status)
265 struct ath_btcoex *btcoex = &sc->btcoex;
266 struct ath_mci_profile *mci = &btcoex->mci;
267 struct ath_mci_profile_info info;
268 int i = 0, old_num_mgmt = mci->num_mgmt;
270 /* Link status type are not handled */
274 info.conn_handle = status->conn_handle;
275 if (ath_mci_find_profile(mci, &info))
278 if (status->conn_handle >= ATH_MCI_MAX_PROFILE)
281 if (status->is_critical)
282 __set_bit(status->conn_handle, mci->status);
284 __clear_bit(status->conn_handle, mci->status);
288 if (test_bit(i, mci->status))
290 } while (++i < ATH_MCI_MAX_PROFILE);
292 if (old_num_mgmt != mci->num_mgmt)
293 ieee80211_queue_work(sc->hw, &sc->mci_work);
296 static void ath_mci_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
298 struct ath_hw *ah = sc->sc_ah;
299 struct ath_mci_profile_info profile_info;
300 struct ath_mci_profile_status profile_status;
301 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
306 case MCI_GPM_COEX_VERSION_QUERY:
307 ar9003_mci_state(ah, MCI_STATE_SEND_WLAN_COEX_VERSION, NULL);
309 case MCI_GPM_COEX_VERSION_RESPONSE:
310 major = *(rx_payload + MCI_GPM_COEX_B_MAJOR_VERSION);
311 minor = *(rx_payload + MCI_GPM_COEX_B_MINOR_VERSION);
312 ar9003_mci_set_bt_version(ah, major, minor);
314 case MCI_GPM_COEX_STATUS_QUERY:
315 ar9003_mci_state(ah, MCI_STATE_SEND_WLAN_CHANNELS, NULL);
317 case MCI_GPM_COEX_BT_PROFILE_INFO:
318 memcpy(&profile_info,
319 (rx_payload + MCI_GPM_COEX_B_PROFILE_TYPE), 10);
321 if ((profile_info.type == MCI_GPM_COEX_PROFILE_UNKNOWN) ||
322 (profile_info.type >= MCI_GPM_COEX_PROFILE_MAX)) {
324 "Illegal profile type = %d, state = %d\n",
330 ath_mci_process_profile(sc, &profile_info);
332 case MCI_GPM_COEX_BT_STATUS_UPDATE:
333 profile_status.is_link = *(rx_payload +
334 MCI_GPM_COEX_B_STATUS_TYPE);
335 profile_status.conn_handle = *(rx_payload +
336 MCI_GPM_COEX_B_STATUS_LINKID);
337 profile_status.is_critical = *(rx_payload +
338 MCI_GPM_COEX_B_STATUS_STATE);
340 seq_num = *((u32 *)(rx_payload + 12));
342 "BT_Status_Update: is_link=%d, linkId=%d, state=%d, SEQ=%d\n",
343 profile_status.is_link, profile_status.conn_handle,
344 profile_status.is_critical, seq_num);
346 ath_mci_process_status(sc, &profile_status);
349 ath_dbg(common, MCI, "Unknown GPM COEX message = 0x%02x\n", opcode);
354 int ath_mci_setup(struct ath_softc *sc)
356 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
357 struct ath_mci_coex *mci = &sc->mci_coex;
358 struct ath_mci_buf *buf = &mci->sched_buf;
360 buf->bf_addr = dma_alloc_coherent(sc->dev,
361 ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
362 &buf->bf_paddr, GFP_KERNEL);
364 if (buf->bf_addr == NULL) {
365 ath_dbg(common, FATAL, "MCI buffer alloc failed\n");
369 memset(buf->bf_addr, MCI_GPM_RSVD_PATTERN,
370 ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE);
372 mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE;
374 mci->gpm_buf.bf_len = ATH_MCI_GPM_BUF_SIZE;
375 mci->gpm_buf.bf_addr = (u8 *)mci->sched_buf.bf_addr + mci->sched_buf.bf_len;
376 mci->gpm_buf.bf_paddr = mci->sched_buf.bf_paddr + mci->sched_buf.bf_len;
378 ar9003_mci_setup(sc->sc_ah, mci->gpm_buf.bf_paddr,
379 mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4),
380 mci->sched_buf.bf_paddr);
382 INIT_WORK(&sc->mci_work, ath9k_mci_work);
383 ath_dbg(common, MCI, "MCI Initialized\n");
388 void ath_mci_cleanup(struct ath_softc *sc)
390 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
391 struct ath_hw *ah = sc->sc_ah;
392 struct ath_mci_coex *mci = &sc->mci_coex;
393 struct ath_mci_buf *buf = &mci->sched_buf;
396 dma_free_coherent(sc->dev,
397 ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
398 buf->bf_addr, buf->bf_paddr);
400 ar9003_mci_cleanup(ah);
402 ath_dbg(common, MCI, "MCI De-Initialized\n");
405 void ath_mci_intr(struct ath_softc *sc)
407 struct ath_mci_coex *mci = &sc->mci_coex;
408 struct ath_hw *ah = sc->sc_ah;
409 struct ath_common *common = ath9k_hw_common(ah);
410 u32 mci_int, mci_int_rxmsg;
411 u32 offset, subtype, opcode;
413 u32 more_data = MCI_GPM_MORE;
414 bool skip_gpm = false;
416 ar9003_mci_get_interrupt(sc->sc_ah, &mci_int, &mci_int_rxmsg);
418 if (ar9003_mci_state(ah, MCI_STATE_ENABLE, NULL) == 0) {
419 ar9003_mci_get_next_gpm_offset(ah, true, NULL);
423 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE) {
424 u32 payload[4] = { 0xffffffff, 0xffffffff,
425 0xffffffff, 0xffffff00};
428 * The following REMOTE_RESET and SYS_WAKING used to sent
429 * only when BT wake up. Now they are always sent, as a
430 * recovery method to reset BT MCI's RX alignment.
432 ar9003_mci_send_message(ah, MCI_REMOTE_RESET, 0,
433 payload, 16, true, false);
434 ar9003_mci_send_message(ah, MCI_SYS_WAKING, 0,
435 NULL, 0, true, false);
437 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE;
438 ar9003_mci_state(ah, MCI_STATE_RESET_REQ_WAKE, NULL);
441 * always do this for recovery and 2G/5G toggling and LNA_TRANS
443 ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE, NULL);
446 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING) {
447 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING;
449 if (ar9003_mci_state(ah, MCI_STATE_BT, NULL) == MCI_BT_SLEEP) {
450 if (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP, NULL) !=
452 ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE,
457 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) {
458 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING;
460 if (ar9003_mci_state(ah, MCI_STATE_BT, NULL) == MCI_BT_AWAKE) {
461 if (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP, NULL) !=
463 ar9003_mci_state(ah, MCI_STATE_SET_BT_SLEEP,
468 if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
469 (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
470 ar9003_mci_state(ah, MCI_STATE_RECOVER_RX, NULL);
474 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO) {
475 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO;
476 offset = ar9003_mci_state(ah, MCI_STATE_LAST_SCHD_MSG_OFFSET,
480 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_GPM) {
481 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_GPM;
483 while (more_data == MCI_GPM_MORE) {
485 pgpm = mci->gpm_buf.bf_addr;
486 offset = ar9003_mci_get_next_gpm_offset(ah, false,
489 if (offset == MCI_GPM_INVALID)
492 pgpm += (offset >> 2);
495 * The first dword is timer.
496 * The real data starts from 2nd dword.
498 subtype = MCI_GPM_TYPE(pgpm);
499 opcode = MCI_GPM_OPCODE(pgpm);
504 if (MCI_GPM_IS_CAL_TYPE(subtype)) {
505 ath_mci_cal_msg(sc, subtype, (u8 *)pgpm);
508 case MCI_GPM_COEX_AGENT:
509 ath_mci_msg(sc, opcode, (u8 *)pgpm);
516 MCI_GPM_RECYCLE(pgpm);
520 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_HW_MSG_MASK) {
521 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL)
522 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL;
524 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_INFO)
525 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_INFO;
527 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO) {
528 int value_dbm = ar9003_mci_state(ah,
529 MCI_STATE_CONT_RSSI_POWER, NULL);
531 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_INFO;
533 if (ar9003_mci_state(ah, MCI_STATE_CONT_TXRX, NULL))
535 "MCI CONT_INFO: (tx) pri = %d, pwr = %d dBm\n",
537 MCI_STATE_CONT_PRIORITY, NULL),
541 "MCI CONT_INFO: (rx) pri = %d,pwr = %d dBm\n",
543 MCI_STATE_CONT_PRIORITY, NULL),
547 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_NACK)
548 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_NACK;
550 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_RST)
551 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_RST;
554 if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
555 (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT))
556 mci_int &= ~(AR_MCI_INTERRUPT_RX_INVALID_HDR |
557 AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT);
560 void ath_mci_enable(struct ath_softc *sc)
562 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
564 if (!common->btcoex_enabled)
567 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
568 sc->sc_ah->imask |= ATH9K_INT_MCI;