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 "hw.h"
  19
  20 enum ath_bt_mode {
  21         ATH_BT_COEX_MODE_LEGACY,        /* legacy rx_clear mode */
  22         ATH_BT_COEX_MODE_UNSLOTTED,     /* untimed/unslotted mode */
  23         ATH_BT_COEX_MODE_SLOTTED,       /* slotted mode */
  24         ATH_BT_COEX_MODE_DISABLED,      /* coexistence disabled */
  25 };
  26
  27 struct ath_btcoex_config {
  28         u8 bt_time_extend;
  29         bool bt_txstate_extend;
  30         bool bt_txframe_extend;
  31         enum ath_bt_mode bt_mode; /* coexistence mode */
  32         bool bt_quiet_collision;
  33         bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/
  34         u8 bt_priority_time;
  35         u8 bt_first_slot_time;
  36         bool bt_hold_rx_clear;
  37 };
  38
  39 static const u32 ar9003_wlan_weights[ATH_BTCOEX_STOMP_MAX]
  40                                     [AR9300_NUM_WLAN_WEIGHTS] = {
  41         { 0xfffffff0, 0xfffffff0, 0xfffffff0, 0xfffffff0 }, /* STOMP_ALL */
  42         { 0x88888880, 0x88888880, 0x88888880, 0x88888880 }, /* STOMP_LOW */
  43         { 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* STOMP_NONE */
  44 };
  45
  46 static const u32 mci_wlan_weights[ATH_BTCOEX_STOMP_MAX]
  47                                  [AR9300_NUM_WLAN_WEIGHTS] = {
  48         { 0x01017d01, 0x41414101, 0x41414101, 0x41414141 }, /* STOMP_ALL */
  49         { 0x01017d01, 0x3b3b3b01, 0x3b3b3b01, 0x3b3b3b3b }, /* STOMP_LOW */
  50         { 0x01017d01, 0x01010101, 0x01010101, 0x01010101 }, /* STOMP_NONE */
  51         { 0x01017d01, 0x013b0101, 0x3b3b0101, 0x3b3b013b }, /* STOMP_LOW_FTP */
  52         { 0xffffff01, 0xffffffff, 0xffffff01, 0xffffffff }, /* STOMP_AUDIO */
  53 };
  54
  55 void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
  56 {
  57         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
  58         const struct ath_btcoex_config ath_bt_config = {
  59                 .bt_time_extend = 0,
  60                 .bt_txstate_extend = true,
  61                 .bt_txframe_extend = true,
  62                 .bt_mode = ATH_BT_COEX_MODE_SLOTTED,
  63                 .bt_quiet_collision = true,
  64                 .bt_rxclear_polarity = true,
  65                 .bt_priority_time = 2,
  66                 .bt_first_slot_time = 5,
  67                 .bt_hold_rx_clear = true,
  68         };
  69         u32 i, idx;
  70         bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity;
  71
  72         if (AR_SREV_9300_20_OR_LATER(ah))
  73                 rxclear_polarity = !ath_bt_config.bt_rxclear_polarity;
  74
  75         btcoex_hw->bt_coex_mode =
  76                 (btcoex_hw->bt_coex_mode & AR_BT_QCU_THRESH) |
  77                 SM(ath_bt_config.bt_time_extend, AR_BT_TIME_EXTEND) |
  78                 SM(ath_bt_config.bt_txstate_extend, AR_BT_TXSTATE_EXTEND) |
  79                 SM(ath_bt_config.bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) |
  80                 SM(ath_bt_config.bt_mode, AR_BT_MODE) |
  81                 SM(ath_bt_config.bt_quiet_collision, AR_BT_QUIET) |
  82                 SM(rxclear_polarity, AR_BT_RX_CLEAR_POLARITY) |
  83                 SM(ath_bt_config.bt_priority_time, AR_BT_PRIORITY_TIME) |
  84                 SM(ath_bt_config.bt_first_slot_time, AR_BT_FIRST_SLOT_TIME) |
  85                 SM(qnum, AR_BT_QCU_THRESH);
  86
  87         btcoex_hw->bt_coex_mode2 =
  88                 SM(ath_bt_config.bt_hold_rx_clear, AR_BT_HOLD_RX_CLEAR) |
  89                 SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) |
  90                 AR_BT_DISABLE_BT_ANT;
  91
  92         for (i = 0; i < 32; i++) {
  93                 idx = (debruijn32 << i) >> 27;
  94                 ah->hw_gen_timers.gen_timer_index[idx] = i;
  95         }
  96 }
  97 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
  98
  99 void ath9k_hw_btcoex_init_scheme(struct ath_hw *ah)
 100 {
 101         struct ath_common *common = ath9k_hw_common(ah);
 102         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 103
 104         /*
 105          * Check if BTCOEX is globally disabled.
 106          */
 107         if (!common->btcoex_enabled) {
 108                 btcoex_hw->scheme = ATH_BTCOEX_CFG_NONE;
 109                 return;
 110         }
 111
 112         if (AR_SREV_9300_20_OR_LATER(ah)) {
 113                 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
 114                 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9300;
 115                 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9300;
 116                 btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9300;
 117         } else if (AR_SREV_9280_20_OR_LATER(ah)) {
 118                 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9280;
 119                 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9280;
 120
 121                 if (AR_SREV_9285(ah)) {
 122                         btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
 123                         btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9285;
 124                 } else {
 125                         btcoex_hw->scheme = ATH_BTCOEX_CFG_2WIRE;
 126                 }
 127         }
 128 }
 129 EXPORT_SYMBOL(ath9k_hw_btcoex_init_scheme);
 130
 131 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
 132 {
 133         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 134
 135         /* connect bt_active to baseband */
 136         REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 137                     (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
 138                      AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
 139
 140         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 141                     AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
 142
 143         /* Set input mux for bt_active to gpio pin */
 144         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 145                       AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 146                       btcoex_hw->btactive_gpio);
 147
 148         /* Configure the desired gpio port for input */
 149         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
 150 }
 151 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
 152
 153 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
 154 {
 155         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 156
 157         /* btcoex 3-wire */
 158         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 159                         (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
 160                          AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
 161
 162         /* Set input mux for bt_prority_async and
 163          *                  bt_active_async to GPIO pins */
 164         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 165                         AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 166                         btcoex_hw->btactive_gpio);
 167
 168         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 169                         AR_GPIO_INPUT_MUX1_BT_PRIORITY,
 170                         btcoex_hw->btpriority_gpio);
 171
 172         /* Configure the desired GPIO ports for input */
 173
 174         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
 175         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btpriority_gpio);
 176 }
 177 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
 178
 179 void ath9k_hw_btcoex_init_mci(struct ath_hw *ah)
 180 {
 181         ah->btcoex_hw.mci.ready = false;
 182         ah->btcoex_hw.mci.bt_state = 0;
 183         ah->btcoex_hw.mci.bt_ver_major = 3;
 184         ah->btcoex_hw.mci.bt_ver_minor = 0;
 185         ah->btcoex_hw.mci.bt_version_known = false;
 186         ah->btcoex_hw.mci.update_2g5g = true;
 187         ah->btcoex_hw.mci.is_2g = true;
 188         ah->btcoex_hw.mci.wlan_channels_update = false;
 189         ah->btcoex_hw.mci.wlan_channels[0] = 0x00000000;
 190         ah->btcoex_hw.mci.wlan_channels[1] = 0xffffffff;
 191         ah->btcoex_hw.mci.wlan_channels[2] = 0xffffffff;
 192         ah->btcoex_hw.mci.wlan_channels[3] = 0x7fffffff;
 193         ah->btcoex_hw.mci.query_bt = true;
 194         ah->btcoex_hw.mci.unhalt_bt_gpm = true;
 195         ah->btcoex_hw.mci.halted_bt_gpm = false;
 196         ah->btcoex_hw.mci.need_flush_btinfo = false;
 197         ah->btcoex_hw.mci.wlan_cal_seq = 0;
 198         ah->btcoex_hw.mci.wlan_cal_done = 0;
 199         ah->btcoex_hw.mci.config = (AR_SREV_9462(ah)) ? 0x2201 : 0xa4c1;
 200 }
 201 EXPORT_SYMBOL(ath9k_hw_btcoex_init_mci);
 202
 203 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
 204 {
 205         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 206
 207         /* Configure the desired GPIO port for TX_FRAME output */
 208         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 209                             AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
 210 }
 211
 212 /*
 213  * For AR9002, bt_weight/wlan_weight are used.
 214  * For AR9003 and above, stomp_type is used.
 215  */
 216 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
 217                                 u32 bt_weight,
 218                                 u32 wlan_weight,
 219                                 enum ath_stomp_type stomp_type)
 220 {
 221         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 222         struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
 223         u8 txprio_shift[] = { 24, 16, 16, 0 }; /* tx priority weight */
 224         bool concur_tx = (mci_hw->concur_tx && btcoex_hw->tx_prio[stomp_type]);
 225         const u32 *weight = ar9003_wlan_weights[stomp_type];
 226         int i;
 227
 228         if (!AR_SREV_9300_20_OR_LATER(ah)) {
 229                 btcoex_hw->bt_coex_weights =
 230                         SM(bt_weight, AR_BTCOEX_BT_WGHT) |
 231                         SM(wlan_weight, AR_BTCOEX_WL_WGHT);
 232                 return;
 233         }
 234
 235         if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
 236                 enum ath_stomp_type stype =
 237                         ((stomp_type == ATH_BTCOEX_STOMP_LOW) &&
 238                          btcoex_hw->mci.stomp_ftp) ?
 239                         ATH_BTCOEX_STOMP_LOW_FTP : stomp_type;
 240                 weight = mci_wlan_weights[stype];
 241         }
 242
 243         for (i = 0; i < AR9300_NUM_WLAN_WEIGHTS; i++) {
 244                 btcoex_hw->bt_weight[i] = AR9300_BT_WGHT;
 245                 btcoex_hw->wlan_weight[i] = weight[i];
 246                 if (concur_tx && i) {
 247                         btcoex_hw->wlan_weight[i] &=
 248                                 ~(0xff << txprio_shift[i-1]);
 249                         btcoex_hw->wlan_weight[i] |=
 250                                 (btcoex_hw->tx_prio[stomp_type] <<
 251                                  txprio_shift[i-1]);
 252                 }
 253         }
 254         /* Last WLAN weight has to be adjusted wrt tx priority */
 255         if (concur_tx) {
 256                 btcoex_hw->wlan_weight[i-1] &= ~(0xff << txprio_shift[i-1]);
 257                 btcoex_hw->wlan_weight[i-1] |= (btcoex_hw->tx_prio[stomp_type]
 258                                                       << txprio_shift[i-1]);
 259         }
 260
 261 }
 262 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
 263
 264
 265 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
 266 {
 267         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 268         u32  val;
 269         int i;
 270
 271         /*
 272          * Program coex mode and weight registers to
 273          * enable coex 3-wire
 274          */
 275         REG_WRITE(ah, AR_BT_COEX_MODE, btcoex->bt_coex_mode);
 276         REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
 277
 278
 279         if (AR_SREV_9300_20_OR_LATER(ah)) {
 280                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, btcoex->wlan_weight[0]);
 281                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, btcoex->wlan_weight[1]);
 282                 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 283                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i),
 284                                   btcoex->bt_weight[i]);
 285         } else
 286                 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex->bt_coex_weights);
 287
 288
 289
 290         if (AR_SREV_9271(ah)) {
 291                 val = REG_READ(ah, 0x50040);
 292                 val &= 0xFFFFFEFF;
 293                 REG_WRITE(ah, 0x50040, val);
 294         }
 295
 296         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 297         REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
 298
 299         ath9k_hw_cfg_output(ah, btcoex->wlanactive_gpio,
 300                             AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
 301 }
 302
 303 static void ath9k_hw_btcoex_enable_mci(struct ath_hw *ah)
 304 {
 305         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 306         int i;
 307
 308         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 309                 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 310                           btcoex->wlan_weight[i]);
 311
 312         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 313         btcoex->enabled = true;
 314 }
 315
 316 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 317 {
 318         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 319
 320         switch (ath9k_hw_get_btcoex_scheme(ah)) {
 321         case ATH_BTCOEX_CFG_NONE:
 322                 return;
 323         case ATH_BTCOEX_CFG_2WIRE:
 324                 ath9k_hw_btcoex_enable_2wire(ah);
 325                 break;
 326         case ATH_BTCOEX_CFG_3WIRE:
 327                 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
 328                         ath9k_hw_btcoex_enable_mci(ah);
 329                         return;
 330                 }
 331                 ath9k_hw_btcoex_enable_3wire(ah);
 332                 break;
 333         }
 334
 335         REG_RMW(ah, AR_GPIO_PDPU,
 336                 (0x2 << (btcoex_hw->btactive_gpio * 2)),
 337                 (0x3 << (btcoex_hw->btactive_gpio * 2)));
 338
 339         ah->btcoex_hw.enabled = true;
 340 }
 341 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
 342
 343 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 344 {
 345         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 346         int i;
 347
 348         btcoex_hw->enabled = false;
 349         if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
 350                 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
 351                 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 352                         REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 353                                   btcoex_hw->wlan_weight[i]);
 354                 return;
 355         }
 356         ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
 357
 358         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 359                         AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 360
 361         if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
 362                 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
 363                 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
 364
 365                 if (AR_SREV_9300_20_OR_LATER(ah)) {
 366                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
 367                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
 368                         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 369                                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 0);
 370                 } else
 371                         REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
 372
 373         }
 374 }
 375 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
 376
 377 /*
 378  * Configures appropriate weight based on stomp type.
 379  */
 380 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
 381                               enum ath_stomp_type stomp_type)
 382 {
 383         if (AR_SREV_9300_20_OR_LATER(ah)) {
 384                 ath9k_hw_btcoex_set_weight(ah, 0, 0, stomp_type);
 385                 return;
 386         }
 387
 388         switch (stomp_type) {
 389         case ATH_BTCOEX_STOMP_ALL:
 390                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 391                                            AR_STOMP_ALL_WLAN_WGHT, 0);
 392                 break;
 393         case ATH_BTCOEX_STOMP_LOW:
 394                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 395                                            AR_STOMP_LOW_WLAN_WGHT, 0);
 396                 break;
 397         case ATH_BTCOEX_STOMP_NONE:
 398                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 399                                            AR_STOMP_NONE_WLAN_WGHT, 0);
 400                 break;
 401         default:
 402                 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Invalid Stomptype\n");
 403                 break;
 404         }
 405 }
 406 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);
 407
 408 void ath9k_hw_btcoex_set_concur_txprio(struct ath_hw *ah, u8 *stomp_txprio)
 409 {
 410         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 411         int i;
 412
 413         for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++)
 414                 btcoex->tx_prio[i] = stomp_txprio[i];
 415 }
 416 EXPORT_SYMBOL(ath9k_hw_btcoex_set_concur_txprio);