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

   1 /*
   2  * Copyright (c) 2009-2011 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/export.h>
  18 #include <linux/types.h>
  19 #include "hw.h"
  20
  21 enum ath_bt_mode {
  22         ATH_BT_COEX_MODE_LEGACY,        /* legacy rx_clear mode */
  23         ATH_BT_COEX_MODE_UNSLOTTED,     /* untimed/unslotted mode */
  24         ATH_BT_COEX_MODE_SLOTTED,       /* slotted mode */
  25         ATH_BT_COEX_MODE_DISABLED,      /* coexistence disabled */
  26 };
  27
  28 struct ath_btcoex_config {
  29         u8 bt_time_extend;
  30         bool bt_txstate_extend;
  31         bool bt_txframe_extend;
  32         enum ath_bt_mode bt_mode; /* coexistence mode */
  33         bool bt_quiet_collision;
  34         bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/
  35         u8 bt_priority_time;
  36         u8 bt_first_slot_time;
  37         bool bt_hold_rx_clear;
  38         u8 wl_active_time;
  39         u8 wl_qc_time;
  40 };
  41
  42 static const u32 ar9003_wlan_weights[ATH_BTCOEX_STOMP_MAX]
  43                                     [AR9300_NUM_WLAN_WEIGHTS] = {
  44         { 0xfffffff0, 0xfffffff0, 0xfffffff0, 0xfffffff0 }, /* STOMP_ALL */
  45         { 0x88888880, 0x88888880, 0x88888880, 0x88888880 }, /* STOMP_LOW */
  46         { 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* STOMP_NONE */
  47 };
  48
  49 static const u32 mci_wlan_weights[ATH_BTCOEX_STOMP_MAX]
  50                                  [AR9300_NUM_WLAN_WEIGHTS] = {
  51         { 0x01017d01, 0x41414101, 0x41414101, 0x41414141 }, /* STOMP_ALL */
  52         { 0x01017d01, 0x3b3b3b01, 0x3b3b3b01, 0x3b3b3b3b }, /* STOMP_LOW */
  53         { 0x01017d01, 0x01010101, 0x01010101, 0x01010101 }, /* STOMP_NONE */
  54         { 0x01017d01, 0x013b0101, 0x3b3b0101, 0x3b3b013b }, /* STOMP_LOW_FTP */
  55         { 0xffffff01, 0xffffffff, 0xffffff01, 0xffffffff }, /* STOMP_AUDIO */
  56 };
  57
  58 void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
  59 {
  60         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
  61         const struct ath_btcoex_config ath_bt_config = {
  62                 .bt_time_extend = 0,
  63                 .bt_txstate_extend = true,
  64                 .bt_txframe_extend = true,
  65                 .bt_mode = ATH_BT_COEX_MODE_SLOTTED,
  66                 .bt_quiet_collision = true,
  67                 .bt_rxclear_polarity = true,
  68                 .bt_priority_time = 2,
  69                 .bt_first_slot_time = 5,
  70                 .bt_hold_rx_clear = true,
  71                 .wl_active_time = 0x20,
  72                 .wl_qc_time = 0x20,
  73         };
  74         bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity;
  75         u8 time_extend = ath_bt_config.bt_time_extend;
  76         u8 first_slot_time = ath_bt_config.bt_first_slot_time;
  77
  78         if (AR_SREV_9300_20_OR_LATER(ah))
  79                 rxclear_polarity = !ath_bt_config.bt_rxclear_polarity;
  80
  81         if (AR_SREV_SOC(ah)) {
  82                 first_slot_time = 0x1d;
  83                 time_extend = 0xa;
  84
  85                 btcoex_hw->bt_coex_mode3 =
  86                         SM(ath_bt_config.wl_active_time, AR_BT_WL_ACTIVE_TIME) |
  87                         SM(ath_bt_config.wl_qc_time, AR_BT_WL_QC_TIME);
  88
  89                 btcoex_hw->bt_coex_mode2 =
  90                         AR_BT_PROTECT_BT_AFTER_WAKEUP |
  91                         AR_BT_PHY_ERR_BT_COLL_ENABLE;
  92         }
  93
  94         btcoex_hw->bt_coex_mode =
  95                 (btcoex_hw->bt_coex_mode & AR_BT_QCU_THRESH) |
  96                 SM(time_extend, AR_BT_TIME_EXTEND) |
  97                 SM(ath_bt_config.bt_txstate_extend, AR_BT_TXSTATE_EXTEND) |
  98                 SM(ath_bt_config.bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) |
  99                 SM(ath_bt_config.bt_mode, AR_BT_MODE) |
 100                 SM(ath_bt_config.bt_quiet_collision, AR_BT_QUIET) |
 101                 SM(rxclear_polarity, AR_BT_RX_CLEAR_POLARITY) |
 102                 SM(ath_bt_config.bt_priority_time, AR_BT_PRIORITY_TIME) |
 103                 SM(first_slot_time, AR_BT_FIRST_SLOT_TIME) |
 104                 SM(qnum, AR_BT_QCU_THRESH);
 105
 106         btcoex_hw->bt_coex_mode2 |=
 107                 SM(ath_bt_config.bt_hold_rx_clear, AR_BT_HOLD_RX_CLEAR) |
 108                 SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) |
 109                 AR_BT_DISABLE_BT_ANT;
 110 }
 111 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
 112
 113 static void ath9k_hw_btcoex_pin_init(struct ath_hw *ah, u8 wlanactive_gpio,
 114                                      u8 btactive_gpio, u8 btpriority_gpio)
 115 {
 116         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 117
 118         if (btcoex_hw->scheme != ATH_BTCOEX_CFG_2WIRE &&
 119             btcoex_hw->scheme != ATH_BTCOEX_CFG_3WIRE)
 120                 return;
 121
 122         btcoex_hw->btactive_gpio = btactive_gpio;
 123         btcoex_hw->wlanactive_gpio = wlanactive_gpio;
 124         btcoex_hw->btpriority_gpio = btpriority_gpio;
 125 }
 126
 127 void ath9k_hw_btcoex_init_scheme(struct ath_hw *ah)
 128 {
 129         struct ath_common *common = ath9k_hw_common(ah);
 130         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 131
 132         /*
 133          * Check if BTCOEX is globally disabled.
 134          */
 135         if (!common->btcoex_enabled) {
 136                 btcoex_hw->scheme = ATH_BTCOEX_CFG_NONE;
 137                 return;
 138         }
 139
 140         if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) {
 141                 btcoex_hw->scheme = ATH_BTCOEX_CFG_MCI;
 142         } else if (AR_SREV_9300_20_OR_LATER(ah)) {
 143                 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
 144
 145                 ath9k_hw_btcoex_pin_init(ah, ATH_WLANACTIVE_GPIO_9300,
 146                                          ATH_BTACTIVE_GPIO_9300,
 147                                          ATH_BTPRIORITY_GPIO_9300);
 148         } else if (AR_SREV_9280_20_OR_LATER(ah)) {
 149                 if (AR_SREV_9285(ah))
 150                         btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
 151                 else
 152                         btcoex_hw->scheme = ATH_BTCOEX_CFG_2WIRE;
 153
 154                 ath9k_hw_btcoex_pin_init(ah, ATH_WLANACTIVE_GPIO_9280,
 155                                          ATH_BTACTIVE_GPIO_9280,
 156                                          ATH_BTPRIORITY_GPIO_9285);
 157         }
 158 }
 159 EXPORT_SYMBOL(ath9k_hw_btcoex_init_scheme);
 160
 161 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
 162 {
 163         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 164
 165         /* connect bt_active to baseband */
 166         REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL(ah),
 167                     (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
 168                      AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
 169
 170         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL(ah),
 171                     AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
 172
 173         /* Set input mux for bt_active to gpio pin */
 174         if (!AR_SREV_SOC(ah))
 175                 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1(ah),
 176                               AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 177                               btcoex_hw->btactive_gpio);
 178
 179         /* Configure the desired gpio port for input */
 180         ath9k_hw_gpio_request_in(ah, btcoex_hw->btactive_gpio,
 181                                  "ath9k-btactive");
 182 }
 183 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
 184
 185 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
 186 {
 187         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 188
 189         /* btcoex 3-wire */
 190         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL(ah),
 191                         (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
 192                          AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
 193
 194         /* Set input mux for bt_prority_async and
 195          *                  bt_active_async to GPIO pins */
 196         if (!AR_SREV_SOC(ah)) {
 197                 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1(ah),
 198                               AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 199                               btcoex_hw->btactive_gpio);
 200                 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1(ah),
 201                               AR_GPIO_INPUT_MUX1_BT_PRIORITY,
 202                               btcoex_hw->btpriority_gpio);
 203         }
 204
 205         /* Configure the desired GPIO ports for input */
 206         ath9k_hw_gpio_request_in(ah, btcoex_hw->btactive_gpio,
 207                                  "ath9k-btactive");
 208         ath9k_hw_gpio_request_in(ah, btcoex_hw->btpriority_gpio,
 209                                  "ath9k-btpriority");
 210 }
 211 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
 212
 213 void ath9k_hw_btcoex_deinit(struct ath_hw *ah)
 214 {
 215         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 216
 217         ath9k_hw_gpio_free(ah, btcoex_hw->btactive_gpio);
 218         ath9k_hw_gpio_free(ah, btcoex_hw->btpriority_gpio);
 219         ath9k_hw_gpio_free(ah, btcoex_hw->wlanactive_gpio);
 220 }
 221 EXPORT_SYMBOL(ath9k_hw_btcoex_deinit);
 222
 223 void ath9k_hw_btcoex_init_mci(struct ath_hw *ah)
 224 {
 225         ah->btcoex_hw.mci.ready = false;
 226         ah->btcoex_hw.mci.bt_state = 0;
 227         ah->btcoex_hw.mci.bt_ver_major = 3;
 228         ah->btcoex_hw.mci.bt_ver_minor = 0;
 229         ah->btcoex_hw.mci.bt_version_known = false;
 230         ah->btcoex_hw.mci.update_2g5g = true;
 231         ah->btcoex_hw.mci.is_2g = true;
 232         ah->btcoex_hw.mci.wlan_channels_update = false;
 233         ah->btcoex_hw.mci.wlan_channels[0] = 0x00000000;
 234         ah->btcoex_hw.mci.wlan_channels[1] = 0xffffffff;
 235         ah->btcoex_hw.mci.wlan_channels[2] = 0xffffffff;
 236         ah->btcoex_hw.mci.wlan_channels[3] = 0x7fffffff;
 237         ah->btcoex_hw.mci.query_bt = true;
 238         ah->btcoex_hw.mci.unhalt_bt_gpm = true;
 239         ah->btcoex_hw.mci.halted_bt_gpm = false;
 240         ah->btcoex_hw.mci.need_flush_btinfo = false;
 241         ah->btcoex_hw.mci.wlan_cal_seq = 0;
 242         ah->btcoex_hw.mci.wlan_cal_done = 0;
 243         ah->btcoex_hw.mci.config = (AR_SREV_9462(ah)) ? 0x2201 : 0xa4c1;
 244 }
 245 EXPORT_SYMBOL(ath9k_hw_btcoex_init_mci);
 246
 247 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
 248 {
 249         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 250
 251         /* Configure the desired GPIO port for TX_FRAME output */
 252         ath9k_hw_gpio_request_out(ah, btcoex_hw->wlanactive_gpio,
 253                                   "ath9k-wlanactive",
 254                                   AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
 255 }
 256
 257 /*
 258  * For AR9002, bt_weight/wlan_weight are used.
 259  * For AR9003 and above, stomp_type is used.
 260  */
 261 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
 262                                 u32 bt_weight,
 263                                 u32 wlan_weight,
 264                                 enum ath_stomp_type stomp_type)
 265 {
 266         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 267         struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
 268         u8 txprio_shift[] = { 24, 16, 16, 0 }; /* tx priority weight */
 269         bool concur_tx = (mci_hw->concur_tx && btcoex_hw->tx_prio[stomp_type]);
 270         const u32 *weight = ar9003_wlan_weights[stomp_type];
 271         int i;
 272
 273         if (!AR_SREV_9300_20_OR_LATER(ah)) {
 274                 btcoex_hw->bt_coex_weights =
 275                         SM(bt_weight, AR_BTCOEX_BT_WGHT) |
 276                         SM(wlan_weight, AR_BTCOEX_WL_WGHT);
 277                 return;
 278         }
 279
 280         if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
 281                 enum ath_stomp_type stype =
 282                         ((stomp_type == ATH_BTCOEX_STOMP_LOW) &&
 283                          btcoex_hw->mci.stomp_ftp) ?
 284                         ATH_BTCOEX_STOMP_LOW_FTP : stomp_type;
 285                 weight = mci_wlan_weights[stype];
 286         }
 287
 288         for (i = 0; i < AR9300_NUM_WLAN_WEIGHTS; i++) {
 289                 btcoex_hw->bt_weight[i] = AR9300_BT_WGHT;
 290                 btcoex_hw->wlan_weight[i] = weight[i];
 291                 if (concur_tx && i) {
 292                         btcoex_hw->wlan_weight[i] &=
 293                                 ~(0xff << txprio_shift[i-1]);
 294                         btcoex_hw->wlan_weight[i] |=
 295                                 (btcoex_hw->tx_prio[stomp_type] <<
 296                                  txprio_shift[i-1]);
 297                 }
 298         }
 299
 300         /* Last WLAN weight has to be adjusted wrt tx priority */
 301         if (concur_tx) {
 302                 btcoex_hw->wlan_weight[i-1] &= ~(0xff << txprio_shift[i-1]);
 303                 btcoex_hw->wlan_weight[i-1] |= (btcoex_hw->tx_prio[stomp_type]
 304                                                       << txprio_shift[i-1]);
 305         }
 306 }
 307 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
 308
 309
 310 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
 311 {
 312         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 313         u32  val;
 314         int i;
 315
 316         /*
 317          * Program coex mode and weight registers to
 318          * enable coex 3-wire
 319          */
 320         if (AR_SREV_SOC(ah))
 321                 REG_CLR_BIT(ah, AR_BT_COEX_MODE2, AR_BT_PHY_ERR_BT_COLL_ENABLE);
 322
 323         REG_WRITE(ah, AR_BT_COEX_MODE, btcoex->bt_coex_mode);
 324         REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
 325
 326         if (AR_SREV_SOC(ah))
 327                 REG_WRITE(ah, AR_BT_COEX_MODE3, btcoex->bt_coex_mode3);
 328
 329         if (AR_SREV_9300_20_OR_LATER(ah)) {
 330                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, btcoex->wlan_weight[0]);
 331                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, btcoex->wlan_weight[1]);
 332                 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 333                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i),
 334                                   btcoex->bt_weight[i]);
 335         } else
 336                 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex->bt_coex_weights);
 337
 338         if (AR_SREV_9271(ah)) {
 339                 val = REG_READ(ah, 0x50040);
 340                 val &= 0xFFFFFEFF;
 341                 REG_WRITE(ah, 0x50040, val);
 342         }
 343
 344         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 345         REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
 346
 347         ath9k_hw_gpio_request_out(ah, btcoex->wlanactive_gpio,
 348                                   "ath9k-wlanactive",
 349                                   AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
 350 }
 351
 352 static void ath9k_hw_btcoex_enable_mci(struct ath_hw *ah)
 353 {
 354         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 355         int i;
 356
 357         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 358                 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 359                           btcoex->wlan_weight[i]);
 360
 361         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 362         btcoex->enabled = true;
 363 }
 364
 365 static void ath9k_hw_btcoex_disable_mci(struct ath_hw *ah)
 366 {
 367         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 368         int i;
 369
 370         ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
 371
 372         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 373                 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 374                           btcoex_hw->wlan_weight[i]);
 375 }
 376
 377 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 378 {
 379         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 380
 381         switch (ath9k_hw_get_btcoex_scheme(ah)) {
 382         case ATH_BTCOEX_CFG_NONE:
 383                 return;
 384         case ATH_BTCOEX_CFG_2WIRE:
 385                 ath9k_hw_btcoex_enable_2wire(ah);
 386                 break;
 387         case ATH_BTCOEX_CFG_3WIRE:
 388                 ath9k_hw_btcoex_enable_3wire(ah);
 389                 break;
 390         case ATH_BTCOEX_CFG_MCI:
 391                 ath9k_hw_btcoex_enable_mci(ah);
 392                 break;
 393         }
 394
 395         if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI &&
 396             !AR_SREV_SOC(ah)) {
 397                 REG_RMW(ah, AR_GPIO_PDPU(ah),
 398                         (0x2 << (btcoex_hw->btactive_gpio * 2)),
 399                         (0x3 << (btcoex_hw->btactive_gpio * 2)));
 400         }
 401
 402         ah->btcoex_hw.enabled = true;
 403 }
 404 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
 405
 406 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 407 {
 408         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 409         int i;
 410
 411         btcoex_hw->enabled = false;
 412
 413         if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_MCI) {
 414                 ath9k_hw_btcoex_disable_mci(ah);
 415                 return;
 416         }
 417
 418         if (!AR_SREV_9300_20_OR_LATER(ah))
 419                 ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
 420
 421         ath9k_hw_gpio_request_out(ah, btcoex_hw->wlanactive_gpio,
 422                                   NULL, AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 423
 424         if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
 425                 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
 426                 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
 427
 428                 if (AR_SREV_9300_20_OR_LATER(ah)) {
 429                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
 430                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
 431                         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 432                                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 0);
 433                 } else
 434                         REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
 435
 436         }
 437 }
 438 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
 439
 440 /*
 441  * Configures appropriate weight based on stomp type.
 442  */
 443 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
 444                               enum ath_stomp_type stomp_type)
 445 {
 446         if (AR_SREV_9300_20_OR_LATER(ah)) {
 447                 ath9k_hw_btcoex_set_weight(ah, 0, 0, stomp_type);
 448                 return;
 449         }
 450
 451         switch (stomp_type) {
 452         case ATH_BTCOEX_STOMP_ALL:
 453                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 454                                            AR_STOMP_ALL_WLAN_WGHT, 0);
 455                 break;
 456         case ATH_BTCOEX_STOMP_LOW:
 457                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 458                                            AR_STOMP_LOW_WLAN_WGHT, 0);
 459                 break;
 460         case ATH_BTCOEX_STOMP_NONE:
 461                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 462                                            AR_STOMP_NONE_WLAN_WGHT, 0);
 463                 break;
 464         default:
 465                 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Invalid Stomptype\n");
 466                 break;
 467         }
 468 }
 469 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);
 470
 471 void ath9k_hw_btcoex_set_concur_txprio(struct ath_hw *ah, u8 *stomp_txprio)
 472 {
 473         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 474         int i;
 475
 476         for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++)
 477                 btcoex->tx_prio[i] = stomp_txprio[i];
 478 }
 479 EXPORT_SYMBOL(ath9k_hw_btcoex_set_concur_txprio);