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

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DEFINITIONS

This source file includes following definitions.
  1. ath9k_hw_init_btcoex_hw
  2. ath9k_hw_btcoex_pin_init
  3. ath9k_hw_btcoex_init_scheme
  4. ath9k_hw_btcoex_init_2wire
  5. ath9k_hw_btcoex_init_3wire
  6. ath9k_hw_btcoex_deinit
  7. ath9k_hw_btcoex_init_mci
  8. ath9k_hw_btcoex_enable_2wire
  9. ath9k_hw_btcoex_set_weight
  10. ath9k_hw_btcoex_enable_3wire
  11. ath9k_hw_btcoex_enable_mci
  12. ath9k_hw_btcoex_disable_mci
  13. ath9k_hw_btcoex_enable
  14. ath9k_hw_btcoex_disable
  15. ath9k_hw_btcoex_bt_stomp
  16. ath9k_hw_btcoex_set_concur_txprio
   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 <linux/ath9k_platform.h>
  20 #include "hw.h"
  21 
  22 enum ath_bt_mode {
  23         ATH_BT_COEX_MODE_LEGACY,        /* legacy rx_clear mode */
  24         ATH_BT_COEX_MODE_UNSLOTTED,     /* untimed/unslotted mode */
  25         ATH_BT_COEX_MODE_SLOTTED,       /* slotted mode */
  26         ATH_BT_COEX_MODE_DISABLED,      /* coexistence disabled */
  27 };
  28 
  29 struct ath_btcoex_config {
  30         u8 bt_time_extend;
  31         bool bt_txstate_extend;
  32         bool bt_txframe_extend;
  33         enum ath_bt_mode bt_mode; /* coexistence mode */
  34         bool bt_quiet_collision;
  35         bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/
  36         u8 bt_priority_time;
  37         u8 bt_first_slot_time;
  38         bool bt_hold_rx_clear;
  39         u8 wl_active_time;
  40         u8 wl_qc_time;
  41 };
  42 
  43 static const u32 ar9003_wlan_weights[ATH_BTCOEX_STOMP_MAX]
  44                                     [AR9300_NUM_WLAN_WEIGHTS] = {
  45         { 0xfffffff0, 0xfffffff0, 0xfffffff0, 0xfffffff0 }, /* STOMP_ALL */
  46         { 0x88888880, 0x88888880, 0x88888880, 0x88888880 }, /* STOMP_LOW */
  47         { 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* STOMP_NONE */
  48 };
  49 
  50 static const u32 mci_wlan_weights[ATH_BTCOEX_STOMP_MAX]
  51                                  [AR9300_NUM_WLAN_WEIGHTS] = {
  52         { 0x01017d01, 0x41414101, 0x41414101, 0x41414141 }, /* STOMP_ALL */
  53         { 0x01017d01, 0x3b3b3b01, 0x3b3b3b01, 0x3b3b3b3b }, /* STOMP_LOW */
  54         { 0x01017d01, 0x01010101, 0x01010101, 0x01010101 }, /* STOMP_NONE */
  55         { 0x01017d01, 0x013b0101, 0x3b3b0101, 0x3b3b013b }, /* STOMP_LOW_FTP */
  56         { 0xffffff01, 0xffffffff, 0xffffff01, 0xffffffff }, /* STOMP_AUDIO */
  57 };
  58 
  59 void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
  60 {
  61         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
  62         const struct ath_btcoex_config ath_bt_config = {
  63                 .bt_time_extend = 0,
  64                 .bt_txstate_extend = true,
  65                 .bt_txframe_extend = true,
  66                 .bt_mode = ATH_BT_COEX_MODE_SLOTTED,
  67                 .bt_quiet_collision = true,
  68                 .bt_rxclear_polarity = true,
  69                 .bt_priority_time = 2,
  70                 .bt_first_slot_time = 5,
  71                 .bt_hold_rx_clear = true,
  72                 .wl_active_time = 0x20,
  73                 .wl_qc_time = 0x20,
  74         };
  75         bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity;
  76         u8 time_extend = ath_bt_config.bt_time_extend;
  77         u8 first_slot_time = ath_bt_config.bt_first_slot_time;
  78 
  79         if (AR_SREV_9300_20_OR_LATER(ah))
  80                 rxclear_polarity = !ath_bt_config.bt_rxclear_polarity;
  81 
  82         if (AR_SREV_SOC(ah)) {
  83                 first_slot_time = 0x1d;
  84                 time_extend = 0xa;
  85 
  86                 btcoex_hw->bt_coex_mode3 =
  87                         SM(ath_bt_config.wl_active_time, AR_BT_WL_ACTIVE_TIME) |
  88                         SM(ath_bt_config.wl_qc_time, AR_BT_WL_QC_TIME);
  89 
  90                 btcoex_hw->bt_coex_mode2 =
  91                         AR_BT_PROTECT_BT_AFTER_WAKEUP |
  92                         AR_BT_PHY_ERR_BT_COLL_ENABLE;
  93         }
  94 
  95         btcoex_hw->bt_coex_mode =
  96                 (btcoex_hw->bt_coex_mode & AR_BT_QCU_THRESH) |
  97                 SM(time_extend, AR_BT_TIME_EXTEND) |
  98                 SM(ath_bt_config.bt_txstate_extend, AR_BT_TXSTATE_EXTEND) |
  99                 SM(ath_bt_config.bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) |
 100                 SM(ath_bt_config.bt_mode, AR_BT_MODE) |
 101                 SM(ath_bt_config.bt_quiet_collision, AR_BT_QUIET) |
 102                 SM(rxclear_polarity, AR_BT_RX_CLEAR_POLARITY) |
 103                 SM(ath_bt_config.bt_priority_time, AR_BT_PRIORITY_TIME) |
 104                 SM(first_slot_time, AR_BT_FIRST_SLOT_TIME) |
 105                 SM(qnum, AR_BT_QCU_THRESH);
 106 
 107         btcoex_hw->bt_coex_mode2 |=
 108                 SM(ath_bt_config.bt_hold_rx_clear, AR_BT_HOLD_RX_CLEAR) |
 109                 SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) |
 110                 AR_BT_DISABLE_BT_ANT;
 111 }
 112 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
 113 
 114 static void ath9k_hw_btcoex_pin_init(struct ath_hw *ah, u8 wlanactive_gpio,
 115                                      u8 btactive_gpio, u8 btpriority_gpio)
 116 {
 117         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 118         struct ath9k_platform_data *pdata = ah->dev->platform_data;
 119 
 120         if (btcoex_hw->scheme != ATH_BTCOEX_CFG_2WIRE &&
 121             btcoex_hw->scheme != ATH_BTCOEX_CFG_3WIRE)
 122                 return;
 123 
 124         /* bt priority GPIO will be ignored by 2 wire scheme */
 125         if (pdata && (pdata->bt_active_pin || pdata->bt_priority_pin ||
 126                       pdata->wlan_active_pin)) {
 127                 btcoex_hw->btactive_gpio = pdata->bt_active_pin;
 128                 btcoex_hw->wlanactive_gpio = pdata->wlan_active_pin;
 129                 btcoex_hw->btpriority_gpio = pdata->bt_priority_pin;
 130         } else {
 131                 btcoex_hw->btactive_gpio = btactive_gpio;
 132                 btcoex_hw->wlanactive_gpio = wlanactive_gpio;
 133                 btcoex_hw->btpriority_gpio = btpriority_gpio;
 134         }
 135 }
 136 
 137 void ath9k_hw_btcoex_init_scheme(struct ath_hw *ah)
 138 {
 139         struct ath_common *common = ath9k_hw_common(ah);
 140         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 141 
 142         /*
 143          * Check if BTCOEX is globally disabled.
 144          */
 145         if (!common->btcoex_enabled) {
 146                 btcoex_hw->scheme = ATH_BTCOEX_CFG_NONE;
 147                 return;
 148         }
 149 
 150         if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) {
 151                 btcoex_hw->scheme = ATH_BTCOEX_CFG_MCI;
 152         } else if (AR_SREV_9300_20_OR_LATER(ah)) {
 153                 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
 154 
 155                 ath9k_hw_btcoex_pin_init(ah, ATH_WLANACTIVE_GPIO_9300,
 156                                          ATH_BTACTIVE_GPIO_9300,
 157                                          ATH_BTPRIORITY_GPIO_9300);
 158         } else if (AR_SREV_9280_20_OR_LATER(ah)) {
 159                 if (AR_SREV_9285(ah))
 160                         btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
 161                 else
 162                         btcoex_hw->scheme = ATH_BTCOEX_CFG_2WIRE;
 163 
 164                 ath9k_hw_btcoex_pin_init(ah, ATH_WLANACTIVE_GPIO_9280,
 165                                          ATH_BTACTIVE_GPIO_9280,
 166                                          ATH_BTPRIORITY_GPIO_9285);
 167         }
 168 }
 169 EXPORT_SYMBOL(ath9k_hw_btcoex_init_scheme);
 170 
 171 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
 172 {
 173         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 174 
 175         /* connect bt_active to baseband */
 176         REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 177                     (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
 178                      AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
 179 
 180         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 181                     AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
 182 
 183         /* Set input mux for bt_active to gpio pin */
 184         if (!AR_SREV_SOC(ah))
 185                 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 186                               AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 187                               btcoex_hw->btactive_gpio);
 188 
 189         /* Configure the desired gpio port for input */
 190         ath9k_hw_gpio_request_in(ah, btcoex_hw->btactive_gpio,
 191                                  "ath9k-btactive");
 192 }
 193 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
 194 
 195 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
 196 {
 197         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 198 
 199         /* btcoex 3-wire */
 200         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 201                         (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
 202                          AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
 203 
 204         /* Set input mux for bt_prority_async and
 205          *                  bt_active_async to GPIO pins */
 206         if (!AR_SREV_SOC(ah)) {
 207                 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 208                               AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 209                               btcoex_hw->btactive_gpio);
 210                 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 211                               AR_GPIO_INPUT_MUX1_BT_PRIORITY,
 212                               btcoex_hw->btpriority_gpio);
 213         }
 214 
 215         /* Configure the desired GPIO ports for input */
 216         ath9k_hw_gpio_request_in(ah, btcoex_hw->btactive_gpio,
 217                                  "ath9k-btactive");
 218         ath9k_hw_gpio_request_in(ah, btcoex_hw->btpriority_gpio,
 219                                  "ath9k-btpriority");
 220 }
 221 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
 222 
 223 void ath9k_hw_btcoex_deinit(struct ath_hw *ah)
 224 {
 225         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 226 
 227         ath9k_hw_gpio_free(ah, btcoex_hw->btactive_gpio);
 228         ath9k_hw_gpio_free(ah, btcoex_hw->btpriority_gpio);
 229         ath9k_hw_gpio_free(ah, btcoex_hw->wlanactive_gpio);
 230 }
 231 EXPORT_SYMBOL(ath9k_hw_btcoex_deinit);
 232 
 233 void ath9k_hw_btcoex_init_mci(struct ath_hw *ah)
 234 {
 235         ah->btcoex_hw.mci.ready = false;
 236         ah->btcoex_hw.mci.bt_state = 0;
 237         ah->btcoex_hw.mci.bt_ver_major = 3;
 238         ah->btcoex_hw.mci.bt_ver_minor = 0;
 239         ah->btcoex_hw.mci.bt_version_known = false;
 240         ah->btcoex_hw.mci.update_2g5g = true;
 241         ah->btcoex_hw.mci.is_2g = true;
 242         ah->btcoex_hw.mci.wlan_channels_update = false;
 243         ah->btcoex_hw.mci.wlan_channels[0] = 0x00000000;
 244         ah->btcoex_hw.mci.wlan_channels[1] = 0xffffffff;
 245         ah->btcoex_hw.mci.wlan_channels[2] = 0xffffffff;
 246         ah->btcoex_hw.mci.wlan_channels[3] = 0x7fffffff;
 247         ah->btcoex_hw.mci.query_bt = true;
 248         ah->btcoex_hw.mci.unhalt_bt_gpm = true;
 249         ah->btcoex_hw.mci.halted_bt_gpm = false;
 250         ah->btcoex_hw.mci.need_flush_btinfo = false;
 251         ah->btcoex_hw.mci.wlan_cal_seq = 0;
 252         ah->btcoex_hw.mci.wlan_cal_done = 0;
 253         ah->btcoex_hw.mci.config = (AR_SREV_9462(ah)) ? 0x2201 : 0xa4c1;
 254 }
 255 EXPORT_SYMBOL(ath9k_hw_btcoex_init_mci);
 256 
 257 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
 258 {
 259         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 260 
 261         /* Configure the desired GPIO port for TX_FRAME output */
 262         ath9k_hw_gpio_request_out(ah, btcoex_hw->wlanactive_gpio,
 263                                   "ath9k-wlanactive",
 264                                   AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
 265 }
 266 
 267 /*
 268  * For AR9002, bt_weight/wlan_weight are used.
 269  * For AR9003 and above, stomp_type is used.
 270  */
 271 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
 272                                 u32 bt_weight,
 273                                 u32 wlan_weight,
 274                                 enum ath_stomp_type stomp_type)
 275 {
 276         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 277         struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
 278         u8 txprio_shift[] = { 24, 16, 16, 0 }; /* tx priority weight */
 279         bool concur_tx = (mci_hw->concur_tx && btcoex_hw->tx_prio[stomp_type]);
 280         const u32 *weight = ar9003_wlan_weights[stomp_type];
 281         int i;
 282 
 283         if (!AR_SREV_9300_20_OR_LATER(ah)) {
 284                 btcoex_hw->bt_coex_weights =
 285                         SM(bt_weight, AR_BTCOEX_BT_WGHT) |
 286                         SM(wlan_weight, AR_BTCOEX_WL_WGHT);
 287                 return;
 288         }
 289 
 290         if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
 291                 enum ath_stomp_type stype =
 292                         ((stomp_type == ATH_BTCOEX_STOMP_LOW) &&
 293                          btcoex_hw->mci.stomp_ftp) ?
 294                         ATH_BTCOEX_STOMP_LOW_FTP : stomp_type;
 295                 weight = mci_wlan_weights[stype];
 296         }
 297 
 298         for (i = 0; i < AR9300_NUM_WLAN_WEIGHTS; i++) {
 299                 btcoex_hw->bt_weight[i] = AR9300_BT_WGHT;
 300                 btcoex_hw->wlan_weight[i] = weight[i];
 301                 if (concur_tx && i) {
 302                         btcoex_hw->wlan_weight[i] &=
 303                                 ~(0xff << txprio_shift[i-1]);
 304                         btcoex_hw->wlan_weight[i] |=
 305                                 (btcoex_hw->tx_prio[stomp_type] <<
 306                                  txprio_shift[i-1]);
 307                 }
 308         }
 309 
 310         /* Last WLAN weight has to be adjusted wrt tx priority */
 311         if (concur_tx) {
 312                 btcoex_hw->wlan_weight[i-1] &= ~(0xff << txprio_shift[i-1]);
 313                 btcoex_hw->wlan_weight[i-1] |= (btcoex_hw->tx_prio[stomp_type]
 314                                                       << txprio_shift[i-1]);
 315         }
 316 }
 317 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
 318 
 319 
 320 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
 321 {
 322         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 323         u32  val;
 324         int i;
 325 
 326         /*
 327          * Program coex mode and weight registers to
 328          * enable coex 3-wire
 329          */
 330         if (AR_SREV_SOC(ah))
 331                 REG_CLR_BIT(ah, AR_BT_COEX_MODE2, AR_BT_PHY_ERR_BT_COLL_ENABLE);
 332 
 333         REG_WRITE(ah, AR_BT_COEX_MODE, btcoex->bt_coex_mode);
 334         REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
 335 
 336         if (AR_SREV_SOC(ah))
 337                 REG_WRITE(ah, AR_BT_COEX_MODE3, btcoex->bt_coex_mode3);
 338 
 339         if (AR_SREV_9300_20_OR_LATER(ah)) {
 340                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, btcoex->wlan_weight[0]);
 341                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, btcoex->wlan_weight[1]);
 342                 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 343                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i),
 344                                   btcoex->bt_weight[i]);
 345         } else
 346                 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex->bt_coex_weights);
 347 
 348         if (AR_SREV_9271(ah)) {
 349                 val = REG_READ(ah, 0x50040);
 350                 val &= 0xFFFFFEFF;
 351                 REG_WRITE(ah, 0x50040, val);
 352         }
 353 
 354         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 355         REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
 356 
 357         ath9k_hw_gpio_request_out(ah, btcoex->wlanactive_gpio,
 358                                   "ath9k-wlanactive",
 359                                   AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
 360 }
 361 
 362 static void ath9k_hw_btcoex_enable_mci(struct ath_hw *ah)
 363 {
 364         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 365         int i;
 366 
 367         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 368                 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 369                           btcoex->wlan_weight[i]);
 370 
 371         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 372         btcoex->enabled = true;
 373 }
 374 
 375 static void ath9k_hw_btcoex_disable_mci(struct ath_hw *ah)
 376 {
 377         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 378         int i;
 379 
 380         ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
 381 
 382         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 383                 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 384                           btcoex_hw->wlan_weight[i]);
 385 }
 386 
 387 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 388 {
 389         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 390 
 391         switch (ath9k_hw_get_btcoex_scheme(ah)) {
 392         case ATH_BTCOEX_CFG_NONE:
 393                 return;
 394         case ATH_BTCOEX_CFG_2WIRE:
 395                 ath9k_hw_btcoex_enable_2wire(ah);
 396                 break;
 397         case ATH_BTCOEX_CFG_3WIRE:
 398                 ath9k_hw_btcoex_enable_3wire(ah);
 399                 break;
 400         case ATH_BTCOEX_CFG_MCI:
 401                 ath9k_hw_btcoex_enable_mci(ah);
 402                 break;
 403         }
 404 
 405         if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI &&
 406             !AR_SREV_SOC(ah)) {
 407                 REG_RMW(ah, AR_GPIO_PDPU,
 408                         (0x2 << (btcoex_hw->btactive_gpio * 2)),
 409                         (0x3 << (btcoex_hw->btactive_gpio * 2)));
 410         }
 411 
 412         ah->btcoex_hw.enabled = true;
 413 }
 414 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
 415 
 416 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 417 {
 418         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 419         int i;
 420 
 421         btcoex_hw->enabled = false;
 422 
 423         if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_MCI) {
 424                 ath9k_hw_btcoex_disable_mci(ah);
 425                 return;
 426         }
 427 
 428         if (!AR_SREV_9300_20_OR_LATER(ah))
 429                 ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
 430 
 431         ath9k_hw_gpio_request_out(ah, btcoex_hw->wlanactive_gpio,
 432                                   NULL, AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 433 
 434         if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
 435                 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
 436                 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
 437 
 438                 if (AR_SREV_9300_20_OR_LATER(ah)) {
 439                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
 440                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
 441                         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 442                                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 0);
 443                 } else
 444                         REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
 445 
 446         }
 447 }
 448 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
 449 
 450 /*
 451  * Configures appropriate weight based on stomp type.
 452  */
 453 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
 454                               enum ath_stomp_type stomp_type)
 455 {
 456         if (AR_SREV_9300_20_OR_LATER(ah)) {
 457                 ath9k_hw_btcoex_set_weight(ah, 0, 0, stomp_type);
 458                 return;
 459         }
 460 
 461         switch (stomp_type) {
 462         case ATH_BTCOEX_STOMP_ALL:
 463                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 464                                            AR_STOMP_ALL_WLAN_WGHT, 0);
 465                 break;
 466         case ATH_BTCOEX_STOMP_LOW:
 467                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 468                                            AR_STOMP_LOW_WLAN_WGHT, 0);
 469                 break;
 470         case ATH_BTCOEX_STOMP_NONE:
 471                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 472                                            AR_STOMP_NONE_WLAN_WGHT, 0);
 473                 break;
 474         default:
 475                 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Invalid Stomptype\n");
 476                 break;
 477         }
 478 }
 479 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);
 480 
 481 void ath9k_hw_btcoex_set_concur_txprio(struct ath_hw *ah, u8 *stomp_txprio)
 482 {
 483         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 484         int i;
 485 
 486         for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++)
 487                 btcoex->tx_prio[i] = stomp_txprio[i];
 488 }
 489 EXPORT_SYMBOL(ath9k_hw_btcoex_set_concur_txprio);
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