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
  47         if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
  48             (info->type == MCI_GPM_COEX_PROFILE_VOICE))
  49                 return false;
  50
  51         if (((NUM_PROF(mci) - mci->num_sco) == ATH_MCI_MAX_ACL_PROFILE) &&
  52             (info->type != MCI_GPM_COEX_PROFILE_VOICE))
  53                 return false;
  54
  55         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
  56         if (!entry)
  57                 return false;
  58
  59         memcpy(entry, info, 10);
  60         INC_PROF(mci, info);
  61         list_add_tail(&entry->list, &mci->info);
  62
  63         return true;
  64 }
  65
  66 static void ath_mci_del_profile(struct ath_common *common,
  67                                 struct ath_mci_profile *mci,
  68                                 struct ath_mci_profile_info *entry)
  69 {
  70         if (!entry)
  71                 return;
  72
  73         DEC_PROF(mci, entry);
  74         list_del(&entry->list);
  75         kfree(entry);
  76 }
  77
  78 void ath_mci_flush_profile(struct ath_mci_profile *mci)
  79 {
  80         struct ath_mci_profile_info *info, *tinfo;
  81
  82         mci->aggr_limit = 0;
  83         mci->num_mgmt = 0;
  84
  85         if (list_empty(&mci->info))
  86                 return;
  87
  88         list_for_each_entry_safe(info, tinfo, &mci->info, list) {
  89                 list_del(&info->list);
  90                 DEC_PROF(mci, info);
  91                 kfree(info);
  92         }
  93 }
  94
  95 static void ath_mci_adjust_aggr_limit(struct ath_btcoex *btcoex)
  96 {
  97         struct ath_mci_profile *mci = &btcoex->mci;
  98         u32 wlan_airtime = btcoex->btcoex_period *
  99                                 (100 - btcoex->duty_cycle) / 100;
 100
 101         /*
 102          * Scale: wlan_airtime is in ms, aggr_limit is in 0.25 ms.
 103          * When wlan_airtime is less than 4ms, aggregation limit has to be
 104          * adjusted half of wlan_airtime to ensure that the aggregation can fit
 105          * without collision with BT traffic.
 106          */
 107         if ((wlan_airtime <= 4) &&
 108             (!mci->aggr_limit || (mci->aggr_limit > (2 * wlan_airtime))))
 109                 mci->aggr_limit = 2 * wlan_airtime;
 110 }
 111
 112 static void ath_mci_update_scheme(struct ath_softc *sc)
 113 {
 114         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 115         struct ath_btcoex *btcoex = &sc->btcoex;
 116         struct ath_mci_profile *mci = &btcoex->mci;
 117         struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
 118         struct ath_mci_profile_info *info;
 119         u32 num_profile = NUM_PROF(mci);
 120
 121         if (mci_hw->config & ATH_MCI_CONFIG_DISABLE_TUNING)
 122                 goto skip_tuning;
 123
 124         mci->aggr_limit = 0;
 125         btcoex->duty_cycle = ath_mci_duty_cycle[num_profile];
 126         btcoex->btcoex_period = ATH_MCI_DEF_BT_PERIOD;
 127         if (NUM_PROF(mci))
 128                 btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
 129         else
 130                 btcoex->bt_stomp_type = mci->num_mgmt ? ATH_BTCOEX_STOMP_ALL :
 131                                                         ATH_BTCOEX_STOMP_LOW;
 132
 133         if (num_profile == 1) {
 134                 info = list_first_entry(&mci->info,
 135                                         struct ath_mci_profile_info,
 136                                         list);
 137                 if (mci->num_sco) {
 138                         if (info->T == 12)
 139                                 mci->aggr_limit = 8;
 140                         else if (info->T == 6) {
 141                                 mci->aggr_limit = 6;
 142                                 btcoex->duty_cycle = 30;
 143                         } else
 144                                 mci->aggr_limit = 6;
 145                         ath_dbg(common, MCI,
 146                                 "Single SCO, aggregation limit %d 1/4 ms\n",
 147                                 mci->aggr_limit);
 148                 } else if (mci->num_pan || mci->num_other_acl) {
 149                         /*
 150                          * For single PAN/FTP profile, allocate 35% for BT
 151                          * to improve WLAN throughput.
 152                          */
 153                         btcoex->duty_cycle = 35;
 154                         btcoex->btcoex_period = 53;
 155                         ath_dbg(common, MCI,
 156                                 "Single PAN/FTP bt period %d ms dutycycle %d\n",
 157                                 btcoex->duty_cycle, btcoex->btcoex_period);
 158                 } else if (mci->num_hid) {
 159                         btcoex->duty_cycle = 30;
 160                         mci->aggr_limit = 6;
 161                         ath_dbg(common, MCI,
 162                                 "Multiple attempt/timeout single HID "
 163                                 "aggregation limit 1.5 ms dutycycle 30%%\n");
 164                 }
 165         } else if (num_profile == 2) {
 166                 if (mci->num_hid == 2)
 167                         btcoex->duty_cycle = 30;
 168                 mci->aggr_limit = 6;
 169                 ath_dbg(common, MCI,
 170                         "Two BT profiles aggr limit 1.5 ms dutycycle %d%%\n",
 171                         btcoex->duty_cycle);
 172         } else if (num_profile >= 3) {
 173                 mci->aggr_limit = 4;
 174                 ath_dbg(common, MCI,
 175                         "Three or more profiles aggregation limit 1 ms\n");
 176         }
 177
 178 skip_tuning:
 179         if (IS_CHAN_2GHZ(sc->sc_ah->curchan)) {
 180                 if (IS_CHAN_HT(sc->sc_ah->curchan))
 181                         ath_mci_adjust_aggr_limit(btcoex);
 182                 else
 183                         btcoex->btcoex_period >>= 1;
 184         }
 185
 186         ath9k_btcoex_timer_pause(sc);
 187         ath9k_hw_btcoex_disable(sc->sc_ah);
 188
 189         if (IS_CHAN_5GHZ(sc->sc_ah->curchan))
 190                 return;
 191
 192         btcoex->duty_cycle += (mci->num_bdr ? ATH_MCI_BDR_DUTY_CYCLE : 0);
 193         if (btcoex->duty_cycle > ATH_MCI_MAX_DUTY_CYCLE)
 194                 btcoex->duty_cycle = ATH_MCI_MAX_DUTY_CYCLE;
 195
 196         btcoex->btcoex_no_stomp =  btcoex->btcoex_period * 1000 *
 197                 (100 - btcoex->duty_cycle) / 100;
 198
 199         ath9k_hw_btcoex_enable(sc->sc_ah);
 200         ath9k_btcoex_timer_resume(sc);
 201 }
 202
 203 static void ath_mci_wait_btcal_done(struct ath_softc *sc)
 204 {
 205         struct ath_hw *ah = sc->sc_ah;
 206
 207         /* Stop tx & rx */
 208         ieee80211_stop_queues(sc->hw);
 209         ath_stoprecv(sc);
 210         ath_drain_all_txq(sc, false);
 211
 212         /* Wait for cal done */
 213         ar9003_mci_start_reset(ah, ah->curchan);
 214
 215         /* Resume tx & rx */
 216         ath_startrecv(sc);
 217         ieee80211_wake_queues(sc->hw);
 218 }
 219
 220 static void ath_mci_cal_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
 221 {
 222         struct ath_hw *ah = sc->sc_ah;
 223         struct ath_common *common = ath9k_hw_common(ah);
 224         struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
 225         u32 payload[4] = {0, 0, 0, 0};
 226
 227         switch (opcode) {
 228         case MCI_GPM_BT_CAL_REQ:
 229                 if (mci_hw->bt_state == MCI_BT_AWAKE) {
 230                         mci_hw->bt_state = MCI_BT_CAL_START;
 231                         ath_mci_wait_btcal_done(sc);
 232                 }
 233                 ath_dbg(common, MCI, "MCI State : %d\n", mci_hw->bt_state);
 234                 break;
 235         case MCI_GPM_BT_CAL_GRANT:
 236                 MCI_GPM_SET_CAL_TYPE(payload, MCI_GPM_WLAN_CAL_DONE);
 237                 ar9003_mci_send_message(sc->sc_ah, MCI_GPM, 0, payload,
 238                                         16, false, true);
 239                 break;
 240         default:
 241                 ath_dbg(common, MCI, "Unknown GPM CAL message\n");
 242                 break;
 243         }
 244 }
 245
 246 static void ath9k_mci_work(struct work_struct *work)
 247 {
 248         struct ath_softc *sc = container_of(work, struct ath_softc, mci_work);
 249
 250         ath_mci_update_scheme(sc);
 251 }
 252
 253 static u8 ath_mci_process_profile(struct ath_softc *sc,
 254                                   struct ath_mci_profile_info *info)
 255 {
 256         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 257         struct ath_btcoex *btcoex = &sc->btcoex;
 258         struct ath_mci_profile *mci = &btcoex->mci;
 259         struct ath_mci_profile_info *entry = NULL;
 260
 261         entry = ath_mci_find_profile(mci, info);
 262         if (entry) {
 263                 /*
 264                  * Two MCI interrupts are generated while connecting to
 265                  * headset and A2DP profile, but only one MCI interrupt
 266                  * is generated with last added profile type while disconnecting
 267                  * both profiles.
 268                  * So while adding second profile type decrement
 269                  * the first one.
 270                  */
 271                 if (entry->type != info->type) {
 272                         DEC_PROF(mci, entry);
 273                         INC_PROF(mci, info);
 274                 }
 275                 memcpy(entry, info, 10);
 276         }
 277
 278         if (info->start) {
 279                 if (!entry && !ath_mci_add_profile(common, mci, info))
 280                         return 0;
 281         } else
 282                 ath_mci_del_profile(common, mci, entry);
 283
 284         return 1;
 285 }
 286
 287 static u8 ath_mci_process_status(struct ath_softc *sc,
 288                                  struct ath_mci_profile_status *status)
 289 {
 290         struct ath_btcoex *btcoex = &sc->btcoex;
 291         struct ath_mci_profile *mci = &btcoex->mci;
 292         struct ath_mci_profile_info info;
 293         int i = 0, old_num_mgmt = mci->num_mgmt;
 294
 295         /* Link status type are not handled */
 296         if (status->is_link)
 297                 return 0;
 298
 299         info.conn_handle = status->conn_handle;
 300         if (ath_mci_find_profile(mci, &info))
 301                 return 0;
 302
 303         if (status->conn_handle >= ATH_MCI_MAX_PROFILE)
 304                 return 0;
 305
 306         if (status->is_critical)
 307                 __set_bit(status->conn_handle, mci->status);
 308         else
 309                 __clear_bit(status->conn_handle, mci->status);
 310
 311         mci->num_mgmt = 0;
 312         do {
 313                 if (test_bit(i, mci->status))
 314                         mci->num_mgmt++;
 315         } while (++i < ATH_MCI_MAX_PROFILE);
 316
 317         if (old_num_mgmt != mci->num_mgmt)
 318                 return 1;
 319
 320         return 0;
 321 }
 322
 323 static void ath_mci_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
 324 {
 325         struct ath_hw *ah = sc->sc_ah;
 326         struct ath_mci_profile_info profile_info;
 327         struct ath_mci_profile_status profile_status;
 328         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 329         u8 major, minor, update_scheme = 0;
 330         u32 seq_num;
 331
 332         if (ar9003_mci_state(ah, MCI_STATE_NEED_FLUSH_BT_INFO) &&
 333             ar9003_mci_state(ah, MCI_STATE_ENABLE)) {
 334                 ath_dbg(common, MCI, "(MCI) Need to flush BT profiles\n");
 335                 ath_mci_flush_profile(&sc->btcoex.mci);
 336                 ar9003_mci_state(ah, MCI_STATE_SEND_STATUS_QUERY);
 337         }
 338
 339         switch (opcode) {
 340         case MCI_GPM_COEX_VERSION_QUERY:
 341                 ar9003_mci_state(ah, MCI_STATE_SEND_WLAN_COEX_VERSION);
 342                 break;
 343         case MCI_GPM_COEX_VERSION_RESPONSE:
 344                 major = *(rx_payload + MCI_GPM_COEX_B_MAJOR_VERSION);
 345                 minor = *(rx_payload + MCI_GPM_COEX_B_MINOR_VERSION);
 346                 ar9003_mci_set_bt_version(ah, major, minor);
 347                 break;
 348         case MCI_GPM_COEX_STATUS_QUERY:
 349                 ar9003_mci_send_wlan_channels(ah);
 350                 break;
 351         case MCI_GPM_COEX_BT_PROFILE_INFO:
 352                 memcpy(&profile_info,
 353                        (rx_payload + MCI_GPM_COEX_B_PROFILE_TYPE), 10);
 354
 355                 if ((profile_info.type == MCI_GPM_COEX_PROFILE_UNKNOWN) ||
 356                     (profile_info.type >= MCI_GPM_COEX_PROFILE_MAX)) {
 357                         ath_dbg(common, MCI,
 358                                 "Illegal profile type = %d, state = %d\n",
 359                                 profile_info.type,
 360                                 profile_info.start);
 361                         break;
 362                 }
 363
 364                 update_scheme += ath_mci_process_profile(sc, &profile_info);
 365                 break;
 366         case MCI_GPM_COEX_BT_STATUS_UPDATE:
 367                 profile_status.is_link = *(rx_payload +
 368                                            MCI_GPM_COEX_B_STATUS_TYPE);
 369                 profile_status.conn_handle = *(rx_payload +
 370                                                MCI_GPM_COEX_B_STATUS_LINKID);
 371                 profile_status.is_critical = *(rx_payload +
 372                                                MCI_GPM_COEX_B_STATUS_STATE);
 373
 374                 seq_num = *((u32 *)(rx_payload + 12));
 375                 ath_dbg(common, MCI,
 376                         "BT_Status_Update: is_link=%d, linkId=%d, state=%d, SEQ=%u\n",
 377                         profile_status.is_link, profile_status.conn_handle,
 378                         profile_status.is_critical, seq_num);
 379
 380                 update_scheme += ath_mci_process_status(sc, &profile_status);
 381                 break;
 382         default:
 383                 ath_dbg(common, MCI, "Unknown GPM COEX message = 0x%02x\n", opcode);
 384                 break;
 385         }
 386         if (update_scheme)
 387                 ieee80211_queue_work(sc->hw, &sc->mci_work);
 388 }
 389
 390 int ath_mci_setup(struct ath_softc *sc)
 391 {
 392         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 393         struct ath_mci_coex *mci = &sc->mci_coex;
 394         struct ath_mci_buf *buf = &mci->sched_buf;
 395         int ret;
 396
 397         buf->bf_addr = dma_alloc_coherent(sc->dev,
 398                                   ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
 399                                   &buf->bf_paddr, GFP_KERNEL);
 400
 401         if (buf->bf_addr == NULL) {
 402                 ath_dbg(common, FATAL, "MCI buffer alloc failed\n");
 403                 return -ENOMEM;
 404         }
 405
 406         memset(buf->bf_addr, MCI_GPM_RSVD_PATTERN,
 407                ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE);
 408
 409         mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE;
 410
 411         mci->gpm_buf.bf_len = ATH_MCI_GPM_BUF_SIZE;
 412         mci->gpm_buf.bf_addr = (u8 *)mci->sched_buf.bf_addr + mci->sched_buf.bf_len;
 413         mci->gpm_buf.bf_paddr = mci->sched_buf.bf_paddr + mci->sched_buf.bf_len;
 414
 415         ret = ar9003_mci_setup(sc->sc_ah, mci->gpm_buf.bf_paddr,
 416                                mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4),
 417                                mci->sched_buf.bf_paddr);
 418         if (ret) {
 419                 ath_err(common, "Failed to initialize MCI\n");
 420                 return ret;
 421         }
 422
 423         INIT_WORK(&sc->mci_work, ath9k_mci_work);
 424         ath_dbg(common, MCI, "MCI Initialized\n");
 425
 426         return 0;
 427 }
 428
 429 void ath_mci_cleanup(struct ath_softc *sc)
 430 {
 431         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 432         struct ath_hw *ah = sc->sc_ah;
 433         struct ath_mci_coex *mci = &sc->mci_coex;
 434         struct ath_mci_buf *buf = &mci->sched_buf;
 435
 436         if (buf->bf_addr)
 437                 dma_free_coherent(sc->dev,
 438                                   ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
 439                                   buf->bf_addr, buf->bf_paddr);
 440
 441         ar9003_mci_cleanup(ah);
 442
 443         ath_dbg(common, MCI, "MCI De-Initialized\n");
 444 }
 445
 446 void ath_mci_intr(struct ath_softc *sc)
 447 {
 448         struct ath_mci_coex *mci = &sc->mci_coex;
 449         struct ath_hw *ah = sc->sc_ah;
 450         struct ath_common *common = ath9k_hw_common(ah);
 451         struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
 452         u32 mci_int, mci_int_rxmsg;
 453         u32 offset, subtype, opcode;
 454         u32 *pgpm;
 455         u32 more_data = MCI_GPM_MORE;
 456         bool skip_gpm = false;
 457
 458         ar9003_mci_get_interrupt(sc->sc_ah, &mci_int, &mci_int_rxmsg);
 459
 460         if (ar9003_mci_state(ah, MCI_STATE_ENABLE) == 0) {
 461                 ar9003_mci_get_next_gpm_offset(ah, true, NULL);
 462                 return;
 463         }
 464
 465         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE) {
 466                 u32 payload[4] = { 0xffffffff, 0xffffffff,
 467                                    0xffffffff, 0xffffff00};
 468
 469                 /*
 470                  * The following REMOTE_RESET and SYS_WAKING used to sent
 471                  * only when BT wake up. Now they are always sent, as a
 472                  * recovery method to reset BT MCI's RX alignment.
 473                  */
 474                 ar9003_mci_send_message(ah, MCI_REMOTE_RESET, 0,
 475                                         payload, 16, true, false);
 476                 ar9003_mci_send_message(ah, MCI_SYS_WAKING, 0,
 477                                         NULL, 0, true, false);
 478
 479                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE;
 480                 ar9003_mci_state(ah, MCI_STATE_RESET_REQ_WAKE);
 481
 482                 /*
 483                  * always do this for recovery and 2G/5G toggling and LNA_TRANS
 484                  */
 485                 ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE);
 486         }
 487
 488         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING) {
 489                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING;
 490
 491                 if ((mci_hw->bt_state == MCI_BT_SLEEP) &&
 492                     (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP) !=
 493                      MCI_BT_SLEEP))
 494                         ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE);
 495         }
 496
 497         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) {
 498                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING;
 499
 500                 if ((mci_hw->bt_state == MCI_BT_AWAKE) &&
 501                     (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP) !=
 502                      MCI_BT_AWAKE))
 503                         mci_hw->bt_state = MCI_BT_SLEEP;
 504         }
 505
 506         if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
 507             (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
 508                 ar9003_mci_state(ah, MCI_STATE_RECOVER_RX);
 509                 skip_gpm = true;
 510         }
 511
 512         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO) {
 513                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO;
 514                 offset = ar9003_mci_state(ah, MCI_STATE_LAST_SCHD_MSG_OFFSET);
 515         }
 516
 517         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_GPM) {
 518                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_GPM;
 519
 520                 while (more_data == MCI_GPM_MORE) {
 521
 522                         pgpm = mci->gpm_buf.bf_addr;
 523                         offset = ar9003_mci_get_next_gpm_offset(ah, false,
 524                                                                 &more_data);
 525
 526                         if (offset == MCI_GPM_INVALID)
 527                                 break;
 528
 529                         pgpm += (offset >> 2);
 530
 531                         /*
 532                          * The first dword is timer.
 533                          * The real data starts from 2nd dword.
 534                          */
 535                         subtype = MCI_GPM_TYPE(pgpm);
 536                         opcode = MCI_GPM_OPCODE(pgpm);
 537
 538                         if (skip_gpm)
 539                                 goto recycle;
 540
 541                         if (MCI_GPM_IS_CAL_TYPE(subtype)) {
 542                                 ath_mci_cal_msg(sc, subtype, (u8 *)pgpm);
 543                         } else {
 544                                 switch (subtype) {
 545                                 case MCI_GPM_COEX_AGENT:
 546                                         ath_mci_msg(sc, opcode, (u8 *)pgpm);
 547                                         break;
 548                                 default:
 549                                         break;
 550                                 }
 551                         }
 552                 recycle:
 553                         MCI_GPM_RECYCLE(pgpm);
 554                 }
 555         }
 556
 557         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_HW_MSG_MASK) {
 558                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL)
 559                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL;
 560
 561                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_INFO)
 562                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_INFO;
 563
 564                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO) {
 565                         int value_dbm = MS(mci_hw->cont_status,
 566                                            AR_MCI_CONT_RSSI_POWER);
 567
 568                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_INFO;
 569
 570                         ath_dbg(common, MCI,
 571                                 "MCI CONT_INFO: (%s) pri = %d pwr = %d dBm\n",
 572                                 MS(mci_hw->cont_status, AR_MCI_CONT_TXRX) ?
 573                                 "tx" : "rx",
 574                                 MS(mci_hw->cont_status, AR_MCI_CONT_PRIORITY),
 575                                 value_dbm);
 576                 }
 577
 578                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_NACK)
 579                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_NACK;
 580
 581                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_RST)
 582                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_RST;
 583         }
 584
 585         if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
 586             (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
 587                 mci_int &= ~(AR_MCI_INTERRUPT_RX_INVALID_HDR |
 588                              AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT);
 589                 ath_mci_msg(sc, MCI_GPM_COEX_NOOP, NULL);
 590         }
 591 }
 592
 593 void ath_mci_enable(struct ath_softc *sc)
 594 {
 595         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 596
 597         if (!common->btcoex_enabled)
 598                 return;
 599
 600         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
 601                 sc->sc_ah->imask |= ATH9K_INT_MCI;
 602 }