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 = (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 } 472 473 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_get_next_gpm_offset(ah, true, NULL); 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, false, 563 &more_data); 564 565 if (offset == MCI_GPM_INVALID) 566 break; 567 568 pgpm += (offset >> 2); 569 570 /* 571 * The first dword is timer. 572 * The real data starts from 2nd dword. 573 */ 574 subtype = MCI_GPM_TYPE(pgpm); 575 opcode = MCI_GPM_OPCODE(pgpm); 576 577 if (skip_gpm) 578 goto recycle; 579 580 if (MCI_GPM_IS_CAL_TYPE(subtype)) { 581 ath_mci_cal_msg(sc, subtype, (u8 *)pgpm); 582 } else { 583 switch (subtype) { 584 case MCI_GPM_COEX_AGENT: 585 ath_mci_msg(sc, opcode, (u8 *)pgpm); 586 break; 587 default: 588 break; 589 } 590 } 591 recycle: 592 MCI_GPM_RECYCLE(pgpm); 593 } 594 } 595 596 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_HW_MSG_MASK) { 597 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL) 598 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL; 599 600 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_INFO) 601 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_INFO; 602 603 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO) { 604 int value_dbm = MS(mci_hw->cont_status, 605 AR_MCI_CONT_RSSI_POWER); 606 607 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_INFO; 608 609 ath_dbg(common, MCI, 610 "MCI CONT_INFO: (%s) pri = %d pwr = %d dBm\n", 611 MS(mci_hw->cont_status, AR_MCI_CONT_TXRX) ? 612 "tx" : "rx", 613 MS(mci_hw->cont_status, AR_MCI_CONT_PRIORITY), 614 value_dbm); 615 } 616 617 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_NACK) 618 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_NACK; 619 620 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_RST) 621 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_RST; 622 } 623 624 if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) || 625 (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) { 626 mci_int &= ~(AR_MCI_INTERRUPT_RX_INVALID_HDR | 627 AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT); 628 ath_mci_msg(sc, MCI_GPM_COEX_NOOP, NULL); 629 } 630 } 631 632 void ath_mci_enable(struct ath_softc *sc) 633 { 634 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 635 636 if (!common->btcoex_enabled) 637 return; 638 639 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) 640 sc->sc_ah->imask |= ATH9K_INT_MCI; 641 } 642 643 void ath9k_mci_update_wlan_channels(struct ath_softc *sc, bool allow_all) 644 { 645 struct ath_hw *ah = sc->sc_ah; 646 struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci; 647 struct ath9k_channel *chan = ah->curchan; 648 u32 channelmap[] = {0x00000000, 0xffff0000, 0xffffffff, 0x7fffffff}; 649 int i; 650 s16 chan_start, chan_end; 651 u16 wlan_chan; 652 653 if (!chan || !IS_CHAN_2GHZ(chan)) 654 return; 655 656 if (allow_all) 657 goto send_wlan_chan; 658 659 wlan_chan = chan->channel - 2402; 660 661 chan_start = wlan_chan - 10; 662 chan_end = wlan_chan + 10; 663 664 if (IS_CHAN_HT40PLUS(chan)) 665 chan_end += 20; 666 else if (IS_CHAN_HT40MINUS(chan)) 667 chan_start -= 20; 668 669 /* adjust side band */ 670 chan_start -= 7; 671 chan_end += 7; 672 673 if (chan_start <= 0) 674 chan_start = 0; 675 if (chan_end >= ATH_MCI_NUM_BT_CHANNELS) 676 chan_end = ATH_MCI_NUM_BT_CHANNELS - 1; 677 678 ath_dbg(ath9k_hw_common(ah), MCI, 679 "WLAN current channel %d mask BT channel %d - %d\n", 680 wlan_chan, chan_start, chan_end); 681 682 for (i = chan_start; i < chan_end; i++) 683 MCI_GPM_CLR_CHANNEL_BIT(&channelmap, i); 684 685 send_wlan_chan: 686 /* update and send wlan channels info to BT */ 687 for (i = 0; i < 4; i++) 688 mci->wlan_channels[i] = channelmap[i]; 689 ar9003_mci_send_wlan_channels(ah); 690 ar9003_mci_state(ah, MCI_STATE_SEND_VERSION_QUERY); 691 } 692 693 void ath9k_mci_set_txpower(struct ath_softc *sc, bool setchannel, 694 bool concur_tx) 695 { 696 struct ath_hw *ah = sc->sc_ah; 697 struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci; 698 bool old_concur_tx = mci_hw->concur_tx; 699 700 if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX)) { 701 mci_hw->concur_tx = false; 702 return; 703 } 704 705 if (!IS_CHAN_2GHZ(ah->curchan)) 706 return; 707 708 if (setchannel) { 709 struct ath9k_hw_cal_data *caldata = &sc->cur_chan->caldata; 710 if (IS_CHAN_HT40PLUS(ah->curchan) && 711 (ah->curchan->channel > caldata->channel) && 712 (ah->curchan->channel <= caldata->channel + 20)) 713 return; 714 if (IS_CHAN_HT40MINUS(ah->curchan) && 715 (ah->curchan->channel < caldata->channel) && 716 (ah->curchan->channel >= caldata->channel - 20)) 717 return; 718 mci_hw->concur_tx = false; 719 } else 720 mci_hw->concur_tx = concur_tx; 721 722 if (old_concur_tx != mci_hw->concur_tx) 723 ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false); 724 } 725 726 static void ath9k_mci_stomp_audio(struct ath_softc *sc) 727 { 728 struct ath_hw *ah = sc->sc_ah; 729 struct ath_btcoex *btcoex = &sc->btcoex; 730 struct ath_mci_profile *mci = &btcoex->mci; 731 732 if (!mci->num_sco && !mci->num_a2dp) 733 return; 734 735 if (ah->stats.avgbrssi > 25) { 736 btcoex->stomp_audio = 0; 737 return; 738 } 739 740 btcoex->stomp_audio++; 741 } 742 void ath9k_mci_update_rssi(struct ath_softc *sc) 743 { 744 struct ath_hw *ah = sc->sc_ah; 745 struct ath_btcoex *btcoex = &sc->btcoex; 746 struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci; 747 748 ath9k_mci_stomp_audio(sc); 749 750 if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX)) 751 return; 752 753 if (ah->stats.avgbrssi >= 40) { 754 if (btcoex->rssi_count < 0) 755 btcoex->rssi_count = 0; 756 if (++btcoex->rssi_count >= ATH_MCI_CONCUR_TX_SWITCH) { 757 btcoex->rssi_count = 0; 758 ath9k_mci_set_txpower(sc, false, true); 759 } 760 } else { 761 if (btcoex->rssi_count > 0) 762 btcoex->rssi_count = 0; 763 if (--btcoex->rssi_count <= -ATH_MCI_CONCUR_TX_SWITCH) { 764 btcoex->rssi_count = 0; 765 ath9k_mci_set_txpower(sc, false, false); 766 } 767 } 768 } 769