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

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DEFINITIONS

This source file includes following definitions.
  1. ath_mci_find_profile
  2. ath_mci_add_profile
  3. ath_mci_del_profile
  4. ath_mci_flush_profile
  5. ath_mci_adjust_aggr_limit
  6. ath_mci_update_scheme
  7. ath_mci_cal_msg
  8. ath9k_mci_work
  9. ath_mci_update_stomp_txprio
  10. ath_mci_set_concur_txprio
  11. ath_mci_process_profile
  12. ath_mci_process_status
  13. ath_mci_msg
  14. ath_mci_setup
  15. ath_mci_cleanup
  16. ath_mci_intr
  17. ath_mci_enable
  18. ath9k_mci_update_wlan_channels
  19. ath9k_mci_set_txpower
  20. ath9k_mci_stomp_audio
  21. ath9k_mci_update_rssi

   1 /*
   2  * Copyright (c) 2010-2011 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16 
  17 #include <linux/dma-mapping.h>
  18 #include <linux/slab.h>
  19 
  20 #include "ath9k.h"
  21 #include "mci.h"
  22 
  23 static const u8 ath_mci_duty_cycle[] = { 55, 50, 60, 70, 80, 85, 90, 95, 98 };
  24 
  25 static struct ath_mci_profile_info*
  26 ath_mci_find_profile(struct ath_mci_profile *mci,
  27                      struct ath_mci_profile_info *info)
  28 {
  29         struct ath_mci_profile_info *entry;
  30 
  31         if (list_empty(&mci->info))
  32                 return NULL;
  33 
  34         list_for_each_entry(entry, &mci->info, list) {
  35                 if (entry->conn_handle == info->conn_handle)
  36                         return entry;
  37         }
  38         return NULL;
  39 }
  40 
  41 static bool ath_mci_add_profile(struct ath_common *common,
  42                                 struct ath_mci_profile *mci,
  43                                 struct ath_mci_profile_info *info)
  44 {
  45         struct ath_mci_profile_info *entry;
  46         u8 voice_priority[] = { 110, 110, 110, 112, 110, 110, 114, 116, 118 };
  47 
  48         if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
  49             (info->type == MCI_GPM_COEX_PROFILE_VOICE))
  50                 return false;
  51 
  52         if (((NUM_PROF(mci) - mci->num_sco) == ATH_MCI_MAX_ACL_PROFILE) &&
  53             (info->type != MCI_GPM_COEX_PROFILE_VOICE))
  54                 return false;
  55 
  56         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
  57         if (!entry)
  58                 return false;
  59 
  60         memcpy(entry, info, 10);
  61         INC_PROF(mci, info);
  62         list_add_tail(&entry->list, &mci->info);
  63         if (info->type == MCI_GPM_COEX_PROFILE_VOICE) {
  64                 if (info->voice_type < sizeof(voice_priority))
  65                         mci->voice_priority = voice_priority[info->voice_type];
  66                 else
  67                         mci->voice_priority = 110;
  68         }
  69 
  70         return true;
  71 }
  72 
  73 static void ath_mci_del_profile(struct ath_common *common,
  74                                 struct ath_mci_profile *mci,
  75                                 struct ath_mci_profile_info *entry)
  76 {
  77         if (!entry)
  78                 return;
  79 
  80         DEC_PROF(mci, entry);
  81         list_del(&entry->list);
  82         kfree(entry);
  83 }
  84 
  85 void ath_mci_flush_profile(struct ath_mci_profile *mci)
  86 {
  87         struct ath_mci_profile_info *info, *tinfo;
  88 
  89         mci->aggr_limit = 0;
  90         mci->num_mgmt = 0;
  91 
  92         if (list_empty(&mci->info))
  93                 return;
  94 
  95         list_for_each_entry_safe(info, tinfo, &mci->info, list) {
  96                 list_del(&info->list);
  97                 DEC_PROF(mci, info);
  98                 kfree(info);
  99         }
 100 }
 101 
 102 static void ath_mci_adjust_aggr_limit(struct ath_btcoex *btcoex)
 103 {
 104         struct ath_mci_profile *mci = &btcoex->mci;
 105         u32 wlan_airtime = btcoex->btcoex_period *
 106                                 (100 - btcoex->duty_cycle) / 100;
 107 
 108         /*
 109          * Scale: wlan_airtime is in ms, aggr_limit is in 0.25 ms.
 110          * When wlan_airtime is less than 4ms, aggregation limit has to be
 111          * adjusted half of wlan_airtime to ensure that the aggregation can fit
 112          * without collision with BT traffic.
 113          */
 114         if ((wlan_airtime <= 4) &&
 115             (!mci->aggr_limit || (mci->aggr_limit > (2 * wlan_airtime))))
 116                 mci->aggr_limit = 2 * wlan_airtime;
 117 }
 118 
 119 static void ath_mci_update_scheme(struct ath_softc *sc)
 120 {
 121         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 122         struct ath_btcoex *btcoex = &sc->btcoex;
 123         struct ath_mci_profile *mci = &btcoex->mci;
 124         struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
 125         struct ath_mci_profile_info *info;
 126         u32 num_profile = NUM_PROF(mci);
 127 
 128         if (mci_hw->config & ATH_MCI_CONFIG_DISABLE_TUNING)
 129                 goto skip_tuning;
 130 
 131         mci->aggr_limit = 0;
 132         btcoex->duty_cycle = ath_mci_duty_cycle[num_profile];
 133         btcoex->btcoex_period = ATH_MCI_DEF_BT_PERIOD;
 134         if (NUM_PROF(mci))
 135                 btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
 136         else
 137                 btcoex->bt_stomp_type = mci->num_mgmt ? ATH_BTCOEX_STOMP_ALL :
 138                                                         ATH_BTCOEX_STOMP_LOW;
 139 
 140         if (num_profile == 1) {
 141                 info = list_first_entry(&mci->info,
 142                                         struct ath_mci_profile_info,
 143                                         list);
 144                 if (mci->num_sco) {
 145                         if (info->T == 12)
 146                                 mci->aggr_limit = 8;
 147                         else if (info->T == 6) {
 148                                 mci->aggr_limit = 6;
 149                                 btcoex->duty_cycle = 30;
 150                         } else
 151                                 mci->aggr_limit = 6;
 152                         ath_dbg(common, MCI,
 153                                 "Single SCO, aggregation limit %d 1/4 ms\n",
 154                                 mci->aggr_limit);
 155                 } else if (mci->num_pan || mci->num_other_acl) {
 156                         /*
 157                          * For single PAN/FTP profile, allocate 35% for BT
 158                          * to improve WLAN throughput.
 159                          */
 160                         btcoex->duty_cycle = AR_SREV_9565(sc->sc_ah) ? 40 : 35;
 161                         btcoex->btcoex_period = 53;
 162                         ath_dbg(common, MCI,
 163                                 "Single PAN/FTP bt period %d ms dutycycle %d\n",
 164                                 btcoex->duty_cycle, btcoex->btcoex_period);
 165                 } else if (mci->num_hid) {
 166                         btcoex->duty_cycle = 30;
 167                         mci->aggr_limit = 6;
 168                         ath_dbg(common, MCI,
 169                                 "Multiple attempt/timeout single HID "
 170                                 "aggregation limit 1.5 ms dutycycle 30%%\n");
 171                 }
 172         } else if (num_profile == 2) {
 173                 if (mci->num_hid == 2)
 174                         btcoex->duty_cycle = 30;
 175                 mci->aggr_limit = 6;
 176                 ath_dbg(common, MCI,
 177                         "Two BT profiles aggr limit 1.5 ms dutycycle %d%%\n",
 178                         btcoex->duty_cycle);
 179         } else if (num_profile >= 3) {
 180                 mci->aggr_limit = 4;
 181                 ath_dbg(common, MCI,
 182                         "Three or more profiles aggregation limit 1 ms\n");
 183         }
 184 
 185 skip_tuning:
 186         if (IS_CHAN_2GHZ(sc->sc_ah->curchan)) {
 187                 if (IS_CHAN_HT(sc->sc_ah->curchan))
 188                         ath_mci_adjust_aggr_limit(btcoex);
 189                 else
 190                         btcoex->btcoex_period >>= 1;
 191         }
 192 
 193         ath9k_btcoex_timer_pause(sc);
 194         ath9k_hw_btcoex_disable(sc->sc_ah);
 195 
 196         if (IS_CHAN_5GHZ(sc->sc_ah->curchan))
 197                 return;
 198 
 199         btcoex->duty_cycle += (mci->num_bdr ? ATH_MCI_BDR_DUTY_CYCLE : 0);
 200         if (btcoex->duty_cycle > ATH_MCI_MAX_DUTY_CYCLE)
 201                 btcoex->duty_cycle = ATH_MCI_MAX_DUTY_CYCLE;
 202 
 203         btcoex->btcoex_no_stomp =  btcoex->btcoex_period *
 204                 (100 - btcoex->duty_cycle) / 100;
 205 
 206         ath9k_hw_btcoex_enable(sc->sc_ah);
 207         ath9k_btcoex_timer_resume(sc);
 208 }
 209 
 210 static void ath_mci_cal_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
 211 {
 212         struct ath_hw *ah = sc->sc_ah;
 213         struct ath_common *common = ath9k_hw_common(ah);
 214         struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
 215         u32 payload[4] = {0, 0, 0, 0};
 216 
 217         switch (opcode) {
 218         case MCI_GPM_BT_CAL_REQ:
 219                 if (mci_hw->bt_state == MCI_BT_AWAKE) {
 220                         mci_hw->bt_state = MCI_BT_CAL_START;
 221                         ath9k_queue_reset(sc, RESET_TYPE_MCI);
 222                 }
 223                 ath_dbg(common, MCI, "MCI State : %d\n", mci_hw->bt_state);
 224                 break;
 225         case MCI_GPM_BT_CAL_GRANT:
 226                 MCI_GPM_SET_CAL_TYPE(payload, MCI_GPM_WLAN_CAL_DONE);
 227                 ar9003_mci_send_message(sc->sc_ah, MCI_GPM, 0, payload,
 228                                         16, false, true);
 229                 break;
 230         default:
 231                 ath_dbg(common, MCI, "Unknown GPM CAL message\n");
 232                 break;
 233         }
 234 }
 235 
 236 static void ath9k_mci_work(struct work_struct *work)
 237 {
 238         struct ath_softc *sc = container_of(work, struct ath_softc, mci_work);
 239 
 240         ath_mci_update_scheme(sc);
 241 }
 242 
 243 static void ath_mci_update_stomp_txprio(u8 cur_txprio, u8 *stomp_prio)
 244 {
 245         if (cur_txprio < stomp_prio[ATH_BTCOEX_STOMP_NONE])
 246                 stomp_prio[ATH_BTCOEX_STOMP_NONE] = cur_txprio;
 247 
 248         if (cur_txprio > stomp_prio[ATH_BTCOEX_STOMP_ALL])
 249                 stomp_prio[ATH_BTCOEX_STOMP_ALL] = cur_txprio;
 250 
 251         if ((cur_txprio > ATH_MCI_HI_PRIO) &&
 252             (cur_txprio < stomp_prio[ATH_BTCOEX_STOMP_LOW]))
 253                 stomp_prio[ATH_BTCOEX_STOMP_LOW] = cur_txprio;
 254 }
 255 
 256 static void ath_mci_set_concur_txprio(struct ath_softc *sc)
 257 {
 258         struct ath_btcoex *btcoex = &sc->btcoex;
 259         struct ath_mci_profile *mci = &btcoex->mci;
 260         u8 stomp_txprio[ATH_BTCOEX_STOMP_MAX];
 261 
 262         memset(stomp_txprio, 0, sizeof(stomp_txprio));
 263         if (mci->num_mgmt) {
 264                 stomp_txprio[ATH_BTCOEX_STOMP_ALL] = ATH_MCI_INQUIRY_PRIO;
 265                 if (!mci->num_pan && !mci->num_other_acl)
 266                         stomp_txprio[ATH_BTCOEX_STOMP_NONE] =
 267                                 ATH_MCI_INQUIRY_PRIO;
 268         } else {
 269                 u8 prof_prio[] = { 50, 90, 94, 52 };/* RFCOMM, A2DP, HID, PAN */
 270 
 271                 stomp_txprio[ATH_BTCOEX_STOMP_LOW] =
 272                 stomp_txprio[ATH_BTCOEX_STOMP_NONE] = 0xff;
 273 
 274                 if (mci->num_sco)
 275                         ath_mci_update_stomp_txprio(mci->voice_priority,
 276                                                     stomp_txprio);
 277                 if (mci->num_other_acl)
 278                         ath_mci_update_stomp_txprio(prof_prio[0], stomp_txprio);
 279                 if (mci->num_a2dp)
 280                         ath_mci_update_stomp_txprio(prof_prio[1], stomp_txprio);
 281                 if (mci->num_hid)
 282                         ath_mci_update_stomp_txprio(prof_prio[2], stomp_txprio);
 283                 if (mci->num_pan)
 284                         ath_mci_update_stomp_txprio(prof_prio[3], stomp_txprio);
 285 
 286                 if (stomp_txprio[ATH_BTCOEX_STOMP_NONE] == 0xff)
 287                         stomp_txprio[ATH_BTCOEX_STOMP_NONE] = 0;
 288 
 289                 if (stomp_txprio[ATH_BTCOEX_STOMP_LOW] == 0xff)
 290                         stomp_txprio[ATH_BTCOEX_STOMP_LOW] = 0;
 291         }
 292         ath9k_hw_btcoex_set_concur_txprio(sc->sc_ah, stomp_txprio);
 293 }
 294 
 295 static u8 ath_mci_process_profile(struct ath_softc *sc,
 296                                   struct ath_mci_profile_info *info)
 297 {
 298         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 299         struct ath_btcoex *btcoex = &sc->btcoex;
 300         struct ath_mci_profile *mci = &btcoex->mci;
 301         struct ath_mci_profile_info *entry = NULL;
 302 
 303         entry = ath_mci_find_profile(mci, info);
 304         if (entry) {
 305                 /*
 306                  * Two MCI interrupts are generated while connecting to
 307                  * headset and A2DP profile, but only one MCI interrupt
 308                  * is generated with last added profile type while disconnecting
 309                  * both profiles.
 310                  * So while adding second profile type decrement
 311                  * the first one.
 312                  */
 313                 if (entry->type != info->type) {
 314                         DEC_PROF(mci, entry);
 315                         INC_PROF(mci, info);
 316                 }
 317                 memcpy(entry, info, 10);
 318         }
 319 
 320         if (info->start) {
 321                 if (!entry && !ath_mci_add_profile(common, mci, info))
 322                         return 0;
 323         } else
 324                 ath_mci_del_profile(common, mci, entry);
 325 
 326         ath_mci_set_concur_txprio(sc);
 327         return 1;
 328 }
 329 
 330 static u8 ath_mci_process_status(struct ath_softc *sc,
 331                                  struct ath_mci_profile_status *status)
 332 {
 333         struct ath_btcoex *btcoex = &sc->btcoex;
 334         struct ath_mci_profile *mci = &btcoex->mci;
 335         struct ath_mci_profile_info info;
 336         int i = 0, old_num_mgmt = mci->num_mgmt;
 337 
 338         /* Link status type are not handled */
 339         if (status->is_link)
 340                 return 0;
 341 
 342         info.conn_handle = status->conn_handle;
 343         if (ath_mci_find_profile(mci, &info))
 344                 return 0;
 345 
 346         if (status->conn_handle >= ATH_MCI_MAX_PROFILE)
 347                 return 0;
 348 
 349         if (status->is_critical)
 350                 __set_bit(status->conn_handle, mci->status);
 351         else
 352                 __clear_bit(status->conn_handle, mci->status);
 353 
 354         mci->num_mgmt = 0;
 355         do {
 356                 if (test_bit(i, mci->status))
 357                         mci->num_mgmt++;
 358         } while (++i < ATH_MCI_MAX_PROFILE);
 359 
 360         ath_mci_set_concur_txprio(sc);
 361         if (old_num_mgmt != mci->num_mgmt)
 362                 return 1;
 363 
 364         return 0;
 365 }
 366 
 367 static void ath_mci_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
 368 {
 369         struct ath_hw *ah = sc->sc_ah;
 370         struct ath_mci_profile_info profile_info;
 371         struct ath_mci_profile_status profile_status;
 372         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 373         u8 major, minor, update_scheme = 0;
 374         u32 seq_num;
 375 
 376         if (ar9003_mci_state(ah, MCI_STATE_NEED_FLUSH_BT_INFO) &&
 377             ar9003_mci_state(ah, MCI_STATE_ENABLE)) {
 378                 ath_dbg(common, MCI, "(MCI) Need to flush BT profiles\n");
 379                 ath_mci_flush_profile(&sc->btcoex.mci);
 380                 ar9003_mci_state(ah, MCI_STATE_SEND_STATUS_QUERY);
 381         }
 382 
 383         switch (opcode) {
 384         case MCI_GPM_COEX_VERSION_QUERY:
 385                 ar9003_mci_state(ah, MCI_STATE_SEND_WLAN_COEX_VERSION);
 386                 break;
 387         case MCI_GPM_COEX_VERSION_RESPONSE:
 388                 major = *(rx_payload + MCI_GPM_COEX_B_MAJOR_VERSION);
 389                 minor = *(rx_payload + MCI_GPM_COEX_B_MINOR_VERSION);
 390                 ar9003_mci_set_bt_version(ah, major, minor);
 391                 break;
 392         case MCI_GPM_COEX_STATUS_QUERY:
 393                 ar9003_mci_send_wlan_channels(ah);
 394                 break;
 395         case MCI_GPM_COEX_BT_PROFILE_INFO:
 396                 memcpy(&profile_info,
 397                        (rx_payload + MCI_GPM_COEX_B_PROFILE_TYPE), 10);
 398 
 399                 if ((profile_info.type == MCI_GPM_COEX_PROFILE_UNKNOWN) ||
 400                     (profile_info.type >= MCI_GPM_COEX_PROFILE_MAX)) {
 401                         ath_dbg(common, MCI,
 402                                 "Illegal profile type = %d, state = %d\n",
 403                                 profile_info.type,
 404                                 profile_info.start);
 405                         break;
 406                 }
 407 
 408                 update_scheme += ath_mci_process_profile(sc, &profile_info);
 409                 break;
 410         case MCI_GPM_COEX_BT_STATUS_UPDATE:
 411                 profile_status.is_link = *(rx_payload +
 412                                            MCI_GPM_COEX_B_STATUS_TYPE);
 413                 profile_status.conn_handle = *(rx_payload +
 414                                                MCI_GPM_COEX_B_STATUS_LINKID);
 415                 profile_status.is_critical = *(rx_payload +
 416                                                MCI_GPM_COEX_B_STATUS_STATE);
 417 
 418                 seq_num = *((u32 *)(rx_payload + 12));
 419                 ath_dbg(common, MCI,
 420                         "BT_Status_Update: is_link=%d, linkId=%d, state=%d, SEQ=%u\n",
 421                         profile_status.is_link, profile_status.conn_handle,
 422                         profile_status.is_critical, seq_num);
 423 
 424                 update_scheme += ath_mci_process_status(sc, &profile_status);
 425                 break;
 426         default:
 427                 ath_dbg(common, MCI, "Unknown GPM COEX message = 0x%02x\n", opcode);
 428                 break;
 429         }
 430         if (update_scheme)
 431                 ieee80211_queue_work(sc->hw, &sc->mci_work);
 432 }
 433 
 434 int ath_mci_setup(struct ath_softc *sc)
 435 {
 436         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 437         struct ath_mci_coex *mci = &sc->mci_coex;
 438         struct ath_mci_buf *buf = &mci->sched_buf;
 439         int ret;
 440 
 441         buf->bf_addr = dmam_alloc_coherent(sc->dev,
 442                                   ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
 443                                   &buf->bf_paddr, GFP_KERNEL);
 444 
 445         if (buf->bf_addr == NULL) {
 446                 ath_dbg(common, FATAL, "MCI buffer alloc failed\n");
 447                 return -ENOMEM;
 448         }
 449 
 450         memset(buf->bf_addr, MCI_GPM_RSVD_PATTERN,
 451                ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE);
 452 
 453         mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE;
 454 
 455         mci->gpm_buf.bf_len = ATH_MCI_GPM_BUF_SIZE;
 456         mci->gpm_buf.bf_addr = mci->sched_buf.bf_addr + mci->sched_buf.bf_len;
 457         mci->gpm_buf.bf_paddr = mci->sched_buf.bf_paddr + mci->sched_buf.bf_len;
 458 
 459         ret = ar9003_mci_setup(sc->sc_ah, mci->gpm_buf.bf_paddr,
 460                                mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4),
 461                                mci->sched_buf.bf_paddr);
 462         if (ret) {
 463                 ath_err(common, "Failed to initialize MCI\n");
 464                 return ret;
 465         }
 466 
 467         INIT_WORK(&sc->mci_work, ath9k_mci_work);
 468         ath_dbg(common, MCI, "MCI Initialized\n");
 469 
 470         return 0;
 471 }
 472 
 473 void ath_mci_cleanup(struct ath_softc *sc)
 474 {
 475         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 476         struct ath_hw *ah = sc->sc_ah;
 477 
 478         ar9003_mci_cleanup(ah);
 479 
 480         ath_dbg(common, MCI, "MCI De-Initialized\n");
 481 }
 482 
 483 void ath_mci_intr(struct ath_softc *sc)
 484 {
 485         struct ath_mci_coex *mci = &sc->mci_coex;
 486         struct ath_hw *ah = sc->sc_ah;
 487         struct ath_common *common = ath9k_hw_common(ah);
 488         struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
 489         u32 mci_int, mci_int_rxmsg;
 490         u32 offset, subtype, opcode;
 491         u32 *pgpm;
 492         u32 more_data = MCI_GPM_MORE;
 493         bool skip_gpm = false;
 494 
 495         ar9003_mci_get_interrupt(sc->sc_ah, &mci_int, &mci_int_rxmsg);
 496 
 497         if (ar9003_mci_state(ah, MCI_STATE_ENABLE) == 0) {
 498                 ar9003_mci_state(ah, MCI_STATE_INIT_GPM_OFFSET);
 499                 return;
 500         }
 501 
 502         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE) {
 503                 u32 payload[4] = { 0xffffffff, 0xffffffff,
 504                                    0xffffffff, 0xffffff00};
 505 
 506                 /*
 507                  * The following REMOTE_RESET and SYS_WAKING used to sent
 508                  * only when BT wake up. Now they are always sent, as a
 509                  * recovery method to reset BT MCI's RX alignment.
 510                  */
 511                 ar9003_mci_send_message(ah, MCI_REMOTE_RESET, 0,
 512                                         payload, 16, true, false);
 513                 ar9003_mci_send_message(ah, MCI_SYS_WAKING, 0,
 514                                         NULL, 0, true, false);
 515 
 516                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE;
 517                 ar9003_mci_state(ah, MCI_STATE_RESET_REQ_WAKE);
 518 
 519                 /*
 520                  * always do this for recovery and 2G/5G toggling and LNA_TRANS
 521                  */
 522                 ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE);
 523         }
 524 
 525         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING) {
 526                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING;
 527 
 528                 if ((mci_hw->bt_state == MCI_BT_SLEEP) &&
 529                     (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP) !=
 530                      MCI_BT_SLEEP))
 531                         ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE);
 532         }
 533 
 534         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) {
 535                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING;
 536 
 537                 if ((mci_hw->bt_state == MCI_BT_AWAKE) &&
 538                     (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP) !=
 539                      MCI_BT_AWAKE))
 540                         mci_hw->bt_state = MCI_BT_SLEEP;
 541         }
 542 
 543         if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
 544             (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
 545                 ar9003_mci_state(ah, MCI_STATE_RECOVER_RX);
 546                 skip_gpm = true;
 547         }
 548 
 549         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO) {
 550                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO;
 551                 ar9003_mci_state(ah, MCI_STATE_LAST_SCHD_MSG_OFFSET);
 552         }
 553 
 554         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_GPM) {
 555                 mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_GPM;
 556 
 557                 while (more_data == MCI_GPM_MORE) {
 558                         if (test_bit(ATH_OP_HW_RESET, &common->op_flags))
 559                                 return;
 560 
 561                         pgpm = mci->gpm_buf.bf_addr;
 562                         offset = ar9003_mci_get_next_gpm_offset(ah, &more_data);
 563 
 564                         if (offset == MCI_GPM_INVALID)
 565                                 break;
 566 
 567                         pgpm += (offset >> 2);
 568 
 569                         /*
 570                          * The first dword is timer.
 571                          * The real data starts from 2nd dword.
 572                          */
 573                         subtype = MCI_GPM_TYPE(pgpm);
 574                         opcode = MCI_GPM_OPCODE(pgpm);
 575 
 576                         if (skip_gpm)
 577                                 goto recycle;
 578 
 579                         if (MCI_GPM_IS_CAL_TYPE(subtype)) {
 580                                 ath_mci_cal_msg(sc, subtype, (u8 *)pgpm);
 581                         } else {
 582                                 switch (subtype) {
 583                                 case MCI_GPM_COEX_AGENT:
 584                                         ath_mci_msg(sc, opcode, (u8 *)pgpm);
 585                                         break;
 586                                 default:
 587                                         break;
 588                                 }
 589                         }
 590                 recycle:
 591                         MCI_GPM_RECYCLE(pgpm);
 592                 }
 593         }
 594 
 595         if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_HW_MSG_MASK) {
 596                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL)
 597                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL;
 598 
 599                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_INFO)
 600                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_INFO;
 601 
 602                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO) {
 603                         int value_dbm = MS(mci_hw->cont_status,
 604                                            AR_MCI_CONT_RSSI_POWER);
 605 
 606                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_INFO;
 607 
 608                         ath_dbg(common, MCI,
 609                                 "MCI CONT_INFO: (%s) pri = %d pwr = %d dBm\n",
 610                                 MS(mci_hw->cont_status, AR_MCI_CONT_TXRX) ?
 611                                 "tx" : "rx",
 612                                 MS(mci_hw->cont_status, AR_MCI_CONT_PRIORITY),
 613                                 value_dbm);
 614                 }
 615 
 616                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_NACK)
 617                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_NACK;
 618 
 619                 if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_RST)
 620                         mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_RST;
 621         }
 622 
 623         if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
 624             (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
 625                 mci_int &= ~(AR_MCI_INTERRUPT_RX_INVALID_HDR |
 626                              AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT);
 627                 ath_mci_msg(sc, MCI_GPM_COEX_NOOP, NULL);
 628         }
 629 }
 630 
 631 void ath_mci_enable(struct ath_softc *sc)
 632 {
 633         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 634 
 635         if (!common->btcoex_enabled)
 636                 return;
 637 
 638         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
 639                 sc->sc_ah->imask |= ATH9K_INT_MCI;
 640 }
 641 
 642 void ath9k_mci_update_wlan_channels(struct ath_softc *sc, bool allow_all)
 643 {
 644         struct ath_hw *ah = sc->sc_ah;
 645         struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
 646         struct ath9k_channel *chan = ah->curchan;
 647         u32 channelmap[] = {0x00000000, 0xffff0000, 0xffffffff, 0x7fffffff};
 648         int i;
 649         s16 chan_start, chan_end;
 650         u16 wlan_chan;
 651 
 652         if (!chan || !IS_CHAN_2GHZ(chan))
 653                 return;
 654 
 655         if (allow_all)
 656                 goto send_wlan_chan;
 657 
 658         wlan_chan = chan->channel - 2402;
 659 
 660         chan_start = wlan_chan - 10;
 661         chan_end = wlan_chan + 10;
 662 
 663         if (IS_CHAN_HT40PLUS(chan))
 664                 chan_end += 20;
 665         else if (IS_CHAN_HT40MINUS(chan))
 666                 chan_start -= 20;
 667 
 668         /* adjust side band */
 669         chan_start -= 7;
 670         chan_end += 7;
 671 
 672         if (chan_start <= 0)
 673                 chan_start = 0;
 674         if (chan_end >= ATH_MCI_NUM_BT_CHANNELS)
 675                 chan_end = ATH_MCI_NUM_BT_CHANNELS - 1;
 676 
 677         ath_dbg(ath9k_hw_common(ah), MCI,
 678                 "WLAN current channel %d mask BT channel %d - %d\n",
 679                 wlan_chan, chan_start, chan_end);
 680 
 681         for (i = chan_start; i < chan_end; i++)
 682                 MCI_GPM_CLR_CHANNEL_BIT(&channelmap, i);
 683 
 684 send_wlan_chan:
 685         /* update and send wlan channels info to BT */
 686         for (i = 0; i < 4; i++)
 687                 mci->wlan_channels[i] = channelmap[i];
 688         ar9003_mci_send_wlan_channels(ah);
 689         ar9003_mci_state(ah, MCI_STATE_SEND_VERSION_QUERY);
 690 }
 691 
 692 void ath9k_mci_set_txpower(struct ath_softc *sc, bool setchannel,
 693                            bool concur_tx)
 694 {
 695         struct ath_hw *ah = sc->sc_ah;
 696         struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
 697         bool old_concur_tx = mci_hw->concur_tx;
 698 
 699         if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX)) {
 700                 mci_hw->concur_tx = false;
 701                 return;
 702         }
 703 
 704         if (!IS_CHAN_2GHZ(ah->curchan))
 705                 return;
 706 
 707         if (setchannel) {
 708                 struct ath9k_hw_cal_data *caldata = &sc->cur_chan->caldata;
 709                 if (IS_CHAN_HT40PLUS(ah->curchan) &&
 710                     (ah->curchan->channel > caldata->channel) &&
 711                     (ah->curchan->channel <= caldata->channel + 20))
 712                         return;
 713                 if (IS_CHAN_HT40MINUS(ah->curchan) &&
 714                     (ah->curchan->channel < caldata->channel) &&
 715                     (ah->curchan->channel >= caldata->channel - 20))
 716                         return;
 717                 mci_hw->concur_tx = false;
 718         } else
 719                 mci_hw->concur_tx = concur_tx;
 720 
 721         if (old_concur_tx != mci_hw->concur_tx)
 722                 ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false);
 723 }
 724 
 725 static void ath9k_mci_stomp_audio(struct ath_softc *sc)
 726 {
 727         struct ath_hw *ah = sc->sc_ah;
 728         struct ath_btcoex *btcoex = &sc->btcoex;
 729         struct ath_mci_profile *mci = &btcoex->mci;
 730 
 731         if (!mci->num_sco && !mci->num_a2dp)
 732                 return;
 733 
 734         if (ah->stats.avgbrssi > 25) {
 735                 btcoex->stomp_audio = 0;
 736                 return;
 737         }
 738 
 739         btcoex->stomp_audio++;
 740 }
 741 void ath9k_mci_update_rssi(struct ath_softc *sc)
 742 {
 743         struct ath_hw *ah = sc->sc_ah;
 744         struct ath_btcoex *btcoex = &sc->btcoex;
 745         struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
 746 
 747         ath9k_mci_stomp_audio(sc);
 748 
 749         if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX))
 750                 return;
 751 
 752         if (ah->stats.avgbrssi >= 40) {
 753                 if (btcoex->rssi_count < 0)
 754                         btcoex->rssi_count = 0;
 755                 if (++btcoex->rssi_count >= ATH_MCI_CONCUR_TX_SWITCH) {
 756                         btcoex->rssi_count = 0;
 757                         ath9k_mci_set_txpower(sc, false, true);
 758                 }
 759         } else {
 760                 if (btcoex->rssi_count > 0)
 761                         btcoex->rssi_count = 0;
 762                 if (--btcoex->rssi_count <= -ATH_MCI_CONCUR_TX_SWITCH) {
 763                         btcoex->rssi_count = 0;
 764                         ath9k_mci_set_txpower(sc, false, false);
 765                 }
 766         }
 767 }

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