drivers/net/wireless/ath/ath9k/mci.c

   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 * 1000 *
 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 = dma_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         struct ath_mci_coex *mci = &sc->mci_coex;
 478         struct ath_mci_buf *buf = &mci->sched_buf;
 479
 480         if (buf->bf_addr)
 481                 dma_free_coherent(sc->dev,
 482                                   ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
 483                                   buf->bf_addr, buf->bf_paddr);
 484
 485         ar9003_mci_cleanup(ah);
 486
 487         ath_dbg(common, MCI, "MCI De-Initialized\n");
 488 }
 489
 490 void ath_mci_intr(struct ath_softc *sc)
 491 {
 492         struct ath_mci_coex *mci = &sc->mci_coex;
 493         struct ath_hw *ah = sc->sc_ah;
 494         struct ath_common *common = ath9k_hw_common(ah);
 495         struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
 496         u32 mci_int, mci_int_rxmsg;
 497         u32 offset, subtype, opcode;
 498         u32 *pgpm;
 499         u32 more_data = MCI_GPM_MORE;
 500         bool skip_gpm = false;
 501
 502         ar9003_mci_get_interrupt(sc->sc_ah, &mci_int, &mci_int_rxmsg);
 503
 504         if (ar9003_mci_state(ah, MCI_STATE_ENABLE) == 0) {
 505                 ar9003_mci_get_next_gpm_offset(ah, true, NULL);
 506                 return;
 507         }
 508
 509         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE) {
 510                 u32 payload[4] = { 0xffffffff, 0xffffffff,
 511                                    0xffffffff, 0xffffff00};
 512
 513                 /*
 514                  * The following REMOTE_RESET and SYS_WAKING used to sent
 515                  * only when BT wake up. Now they are always sent, as a
 516                  * recovery method to reset BT MCI's RX alignment.
 517                  */
 518                 ar9003_mci_send_message(ah, MCI_REMOTE_RESET, 0,
 519                                         payload, 16, true, false);
 520                 ar9003_mci_send_message(ah, MCI_SYS_WAKING, 0,
 521                                         NULL, 0, true, false);
 522
 523                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE;
 524                 ar9003_mci_state(ah, MCI_STATE_RESET_REQ_WAKE);
 525
 526                 /*
 527                  * always do this for recovery and 2G/5G toggling and LNA_TRANS
 528                  */
 529                 ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE);
 530         }
 531
 532         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING) {
 533                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING;
 534
 535                 if ((mci_hw->bt_state == MCI_BT_SLEEP) &&
 536                     (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP) !=
 537                      MCI_BT_SLEEP))
 538                         ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE);
 539         }
 540
 541         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) {
 542                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING;
 543
 544                 if ((mci_hw->bt_state == MCI_BT_AWAKE) &&
 545                     (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP) !=
 546                      MCI_BT_AWAKE))
 547                         mci_hw->bt_state = MCI_BT_SLEEP;
 548         }
 549
 550         if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
 551             (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
 552                 ar9003_mci_state(ah, MCI_STATE_RECOVER_RX);
 553                 skip_gpm = true;
 554         }
 555
 556         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO) {
 557                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO;
 558                 offset = ar9003_mci_state(ah, MCI_STATE_LAST_SCHD_MSG_OFFSET);
 559         }
 560
 561         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_GPM) {
 562                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_GPM;
 563
 564                 while (more_data == MCI_GPM_MORE) {
 565                         if (test_bit(SC_OP_HW_RESET, &sc->sc_flags))
 566                                 return;
 567
 568                         pgpm = mci->gpm_buf.bf_addr;
 569                         offset = ar9003_mci_get_next_gpm_offset(ah, false,
 570                                                                 &more_data);
 571
 572                         if (offset == MCI_GPM_INVALID)
 573                                 break;
 574
 575                         pgpm += (offset >> 2);
 576
 577                         /*
 578                          * The first dword is timer.
 579                          * The real data starts from 2nd dword.
 580                          */
 581                         subtype = MCI_GPM_TYPE(pgpm);
 582                         opcode = MCI_GPM_OPCODE(pgpm);
 583
 584                         if (skip_gpm)
 585                                 goto recycle;
 586
 587                         if (MCI_GPM_IS_CAL_TYPE(subtype)) {
 588                                 ath_mci_cal_msg(sc, subtype, (u8 *)pgpm);
 589                         } else {
 590                                 switch (subtype) {
 591                                 case MCI_GPM_COEX_AGENT:
 592                                         ath_mci_msg(sc, opcode, (u8 *)pgpm);
 593                                         break;
 594                                 default:
 595                                         break;
 596                                 }
 597                         }
 598                 recycle:
 599                         MCI_GPM_RECYCLE(pgpm);
 600                 }
 601         }
 602
 603         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_HW_MSG_MASK) {
 604                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL)
 605                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL;
 606
 607                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_INFO)
 608                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_INFO;
 609
 610                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO) {
 611                         int value_dbm = MS(mci_hw->cont_status,
 612                                            AR_MCI_CONT_RSSI_POWER);
 613
 614                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_INFO;
 615
 616                         ath_dbg(common, MCI,
 617                                 "MCI CONT_INFO: (%s) pri = %d pwr = %d dBm\n",
 618                                 MS(mci_hw->cont_status, AR_MCI_CONT_TXRX) ?
 619                                 "tx" : "rx",
 620                                 MS(mci_hw->cont_status, AR_MCI_CONT_PRIORITY),
 621                                 value_dbm);
 622                 }
 623
 624                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_NACK)
 625                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_NACK;
 626
 627                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_RST)
 628                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_RST;
 629         }
 630
 631         if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
 632             (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
 633                 mci_int &= ~(AR_MCI_INTERRUPT_RX_INVALID_HDR |
 634                              AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT);
 635                 ath_mci_msg(sc, MCI_GPM_COEX_NOOP, NULL);
 636         }
 637 }
 638
 639 void ath_mci_enable(struct ath_softc *sc)
 640 {
 641         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 642
 643         if (!common->btcoex_enabled)
 644                 return;
 645
 646         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
 647                 sc->sc_ah->imask |= ATH9K_INT_MCI;
 648 }
 649
 650 void ath9k_mci_update_wlan_channels(struct ath_softc *sc, bool allow_all)
 651 {
 652         struct ath_hw *ah = sc->sc_ah;
 653         struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
 654         struct ath9k_channel *chan = ah->curchan;
 655         u32 channelmap[] = {0x00000000, 0xffff0000, 0xffffffff, 0x7fffffff};
 656         int i;
 657         s16 chan_start, chan_end;
 658         u16 wlan_chan;
 659
 660         if (!chan || !IS_CHAN_2GHZ(chan))
 661                 return;
 662
 663         if (allow_all)
 664                 goto send_wlan_chan;
 665
 666         wlan_chan = chan->channel - 2402;
 667
 668         chan_start = wlan_chan - 10;
 669         chan_end = wlan_chan + 10;
 670
 671         if (chan->chanmode == CHANNEL_G_HT40PLUS)
 672                 chan_end += 20;
 673         else if (chan->chanmode == CHANNEL_G_HT40MINUS)
 674                 chan_start -= 20;
 675
 676         /* adjust side band */
 677         chan_start -= 7;
 678         chan_end += 7;
 679
 680         if (chan_start <= 0)
 681                 chan_start = 0;
 682         if (chan_end >= ATH_MCI_NUM_BT_CHANNELS)
 683                 chan_end = ATH_MCI_NUM_BT_CHANNELS - 1;
 684
 685         ath_dbg(ath9k_hw_common(ah), MCI,
 686                 "WLAN current channel %d mask BT channel %d - %d\n",
 687                 wlan_chan, chan_start, chan_end);
 688
 689         for (i = chan_start; i < chan_end; i++)
 690                 MCI_GPM_CLR_CHANNEL_BIT(&channelmap, i);
 691
 692 send_wlan_chan:
 693         /* update and send wlan channels info to BT */
 694         for (i = 0; i < 4; i++)
 695                 mci->wlan_channels[i] = channelmap[i];
 696         ar9003_mci_send_wlan_channels(ah);
 697         ar9003_mci_state(ah, MCI_STATE_SEND_VERSION_QUERY);
 698 }
 699
 700 void ath9k_mci_set_txpower(struct ath_softc *sc, bool setchannel,
 701                            bool concur_tx)
 702 {
 703         struct ath_hw *ah = sc->sc_ah;
 704         struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
 705         bool old_concur_tx = mci_hw->concur_tx;
 706
 707         if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX)) {
 708                 mci_hw->concur_tx = false;
 709                 return;
 710         }
 711
 712         if (!IS_CHAN_2GHZ(ah->curchan))
 713                 return;
 714
 715         if (setchannel) {
 716                 struct ath9k_hw_cal_data *caldata = &sc->caldata;
 717                 if ((caldata->chanmode == CHANNEL_G_HT40PLUS) &&
 718                     (ah->curchan->channel > caldata->channel) &&
 719                     (ah->curchan->channel <= caldata->channel + 20))
 720                         return;
 721                 if ((caldata->chanmode == CHANNEL_G_HT40MINUS) &&
 722                     (ah->curchan->channel < caldata->channel) &&
 723                     (ah->curchan->channel >= caldata->channel - 20))
 724                         return;
 725                 mci_hw->concur_tx = false;
 726         } else
 727                 mci_hw->concur_tx = concur_tx;
 728
 729         if (old_concur_tx != mci_hw->concur_tx)
 730                 ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit, false);
 731 }
 732
 733 static void ath9k_mci_stomp_audio(struct ath_softc *sc)
 734 {
 735         struct ath_hw *ah = sc->sc_ah;
 736         struct ath_btcoex *btcoex = &sc->btcoex;
 737         struct ath_mci_profile *mci = &btcoex->mci;
 738
 739         if (!mci->num_sco && !mci->num_a2dp)
 740                 return;
 741
 742         if (ah->stats.avgbrssi > 25) {
 743                 btcoex->stomp_audio = 0;
 744                 return;
 745         }
 746
 747         btcoex->stomp_audio++;
 748 }
 749 void ath9k_mci_update_rssi(struct ath_softc *sc)
 750 {
 751         struct ath_hw *ah = sc->sc_ah;
 752         struct ath_btcoex *btcoex = &sc->btcoex;
 753         struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
 754
 755         ath9k_mci_stomp_audio(sc);
 756
 757         if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX))
 758                 return;
 759
 760         if (ah->stats.avgbrssi >= 40) {
 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, true);
 766                 }
 767         } else {
 768                 if (btcoex->rssi_count > 0)
 769                         btcoex->rssi_count = 0;
 770                 if (--btcoex->rssi_count <= -ATH_MCI_CONCUR_TX_SWITCH) {
 771                         btcoex->rssi_count = 0;
 772                         ath9k_mci_set_txpower(sc, false, false);
 773                 }
 774         }
 775 }