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 ar9462_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 };
  53
  54 void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
  55 {
  56         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
  57         const struct ath_btcoex_config ath_bt_config = {
  58                 .bt_time_extend = 0,
  59                 .bt_txstate_extend = true,
  60                 .bt_txframe_extend = true,
  61                 .bt_mode = ATH_BT_COEX_MODE_SLOTTED,
  62                 .bt_quiet_collision = true,
  63                 .bt_rxclear_polarity = true,
  64                 .bt_priority_time = 2,
  65                 .bt_first_slot_time = 5,
  66                 .bt_hold_rx_clear = true,
  67         };
  68         u32 i, idx;
  69         bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity;
  70
  71         if (AR_SREV_9300_20_OR_LATER(ah))
  72                 rxclear_polarity = !ath_bt_config.bt_rxclear_polarity;
  73
  74         btcoex_hw->bt_coex_mode =
  75                 (btcoex_hw->bt_coex_mode & AR_BT_QCU_THRESH) |
  76                 SM(ath_bt_config.bt_time_extend, AR_BT_TIME_EXTEND) |
  77                 SM(ath_bt_config.bt_txstate_extend, AR_BT_TXSTATE_EXTEND) |
  78                 SM(ath_bt_config.bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) |
  79                 SM(ath_bt_config.bt_mode, AR_BT_MODE) |
  80                 SM(ath_bt_config.bt_quiet_collision, AR_BT_QUIET) |
  81                 SM(rxclear_polarity, AR_BT_RX_CLEAR_POLARITY) |
  82                 SM(ath_bt_config.bt_priority_time, AR_BT_PRIORITY_TIME) |
  83                 SM(ath_bt_config.bt_first_slot_time, AR_BT_FIRST_SLOT_TIME) |
  84                 SM(qnum, AR_BT_QCU_THRESH);
  85
  86         btcoex_hw->bt_coex_mode2 =
  87                 SM(ath_bt_config.bt_hold_rx_clear, AR_BT_HOLD_RX_CLEAR) |
  88                 SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) |
  89                 AR_BT_DISABLE_BT_ANT;
  90
  91         for (i = 0; i < 32; i++) {
  92                 idx = (debruijn32 << i) >> 27;
  93                 ah->hw_gen_timers.gen_timer_index[idx] = i;
  94         }
  95 }
  96 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
  97
  98 void ath9k_hw_btcoex_init_scheme(struct ath_hw *ah)
  99 {
 100         struct ath_common *common = ath9k_hw_common(ah);
 101         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 102
 103         /*
 104          * Check if BTCOEX is globally disabled.
 105          */
 106         if (!common->btcoex_enabled) {
 107                 btcoex_hw->scheme = ATH_BTCOEX_CFG_NONE;
 108                 return;
 109         }
 110
 111         if (AR_SREV_9300_20_OR_LATER(ah)) {
 112                 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
 113                 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9300;
 114                 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9300;
 115                 btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9300;
 116         } else if (AR_SREV_9280_20_OR_LATER(ah)) {
 117                 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9280;
 118                 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9280;
 119
 120                 if (AR_SREV_9285(ah)) {
 121                         btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
 122                         btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9285;
 123                 } else {
 124                         btcoex_hw->scheme = ATH_BTCOEX_CFG_2WIRE;
 125                 }
 126         }
 127 }
 128 EXPORT_SYMBOL(ath9k_hw_btcoex_init_scheme);
 129
 130 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
 131 {
 132         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 133
 134         /* connect bt_active to baseband */
 135         REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 136                     (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
 137                      AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
 138
 139         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 140                     AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
 141
 142         /* Set input mux for bt_active to gpio pin */
 143         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 144                       AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 145                       btcoex_hw->btactive_gpio);
 146
 147         /* Configure the desired gpio port for input */
 148         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
 149 }
 150 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
 151
 152 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
 153 {
 154         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 155
 156         /* btcoex 3-wire */
 157         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 158                         (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
 159                          AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
 160
 161         /* Set input mux for bt_prority_async and
 162          *                  bt_active_async to GPIO pins */
 163         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 164                         AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 165                         btcoex_hw->btactive_gpio);
 166
 167         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 168                         AR_GPIO_INPUT_MUX1_BT_PRIORITY,
 169                         btcoex_hw->btpriority_gpio);
 170
 171         /* Configure the desired GPIO ports for input */
 172
 173         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
 174         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btpriority_gpio);
 175 }
 176 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
 177
 178 void ath9k_hw_btcoex_init_mci(struct ath_hw *ah)
 179 {
 180         ah->btcoex_hw.mci.ready = false;
 181         ah->btcoex_hw.mci.bt_state = 0;
 182         ah->btcoex_hw.mci.bt_ver_major = 3;
 183         ah->btcoex_hw.mci.bt_ver_minor = 0;
 184         ah->btcoex_hw.mci.bt_version_known = false;
 185         ah->btcoex_hw.mci.update_2g5g = true;
 186         ah->btcoex_hw.mci.is_2g = true;
 187         ah->btcoex_hw.mci.wlan_channels_update = false;
 188         ah->btcoex_hw.mci.wlan_channels[0] = 0x00000000;
 189         ah->btcoex_hw.mci.wlan_channels[1] = 0xffffffff;
 190         ah->btcoex_hw.mci.wlan_channels[2] = 0xffffffff;
 191         ah->btcoex_hw.mci.wlan_channels[3] = 0x7fffffff;
 192         ah->btcoex_hw.mci.query_bt = true;
 193         ah->btcoex_hw.mci.unhalt_bt_gpm = true;
 194         ah->btcoex_hw.mci.halted_bt_gpm = false;
 195         ah->btcoex_hw.mci.need_flush_btinfo = false;
 196         ah->btcoex_hw.mci.wlan_cal_seq = 0;
 197         ah->btcoex_hw.mci.wlan_cal_done = 0;
 198         ah->btcoex_hw.mci.config = 0x2201;
 199 }
 200 EXPORT_SYMBOL(ath9k_hw_btcoex_init_mci);
 201
 202 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
 203 {
 204         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 205
 206         /* Configure the desired GPIO port for TX_FRAME output */
 207         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 208                             AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
 209 }
 210
 211 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
 212                                 u32 bt_weight,
 213                                 u32 wlan_weight)
 214 {
 215         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 216
 217         btcoex_hw->bt_coex_weights = SM(bt_weight, AR_BTCOEX_BT_WGHT) |
 218                                      SM(wlan_weight, AR_BTCOEX_WL_WGHT);
 219 }
 220 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
 221
 222
 223 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
 224 {
 225         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 226         u32  val;
 227         int i;
 228
 229         /*
 230          * Program coex mode and weight registers to
 231          * enable coex 3-wire
 232          */
 233         REG_WRITE(ah, AR_BT_COEX_MODE, btcoex->bt_coex_mode);
 234         REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
 235
 236
 237         if (AR_SREV_9300_20_OR_LATER(ah)) {
 238                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, btcoex->wlan_weight[0]);
 239                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, btcoex->wlan_weight[1]);
 240                 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 241                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i),
 242                                   btcoex->bt_weight[i]);
 243         } else
 244                 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex->bt_coex_weights);
 245
 246
 247
 248         if (AR_SREV_9271(ah)) {
 249                 val = REG_READ(ah, 0x50040);
 250                 val &= 0xFFFFFEFF;
 251                 REG_WRITE(ah, 0x50040, val);
 252         }
 253
 254         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 255         REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
 256
 257         ath9k_hw_cfg_output(ah, btcoex->wlanactive_gpio,
 258                             AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
 259 }
 260
 261 static void ath9k_hw_btcoex_enable_mci(struct ath_hw *ah)
 262 {
 263         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 264         int i;
 265
 266         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 267                 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 268                           btcoex->wlan_weight[i]);
 269
 270         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 271         btcoex->enabled = true;
 272 }
 273
 274 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 275 {
 276         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 277
 278         switch (ath9k_hw_get_btcoex_scheme(ah)) {
 279         case ATH_BTCOEX_CFG_NONE:
 280                 return;
 281         case ATH_BTCOEX_CFG_2WIRE:
 282                 ath9k_hw_btcoex_enable_2wire(ah);
 283                 break;
 284         case ATH_BTCOEX_CFG_3WIRE:
 285                 if (AR_SREV_9462(ah)) {
 286                         ath9k_hw_btcoex_enable_mci(ah);
 287                         return;
 288                 }
 289                 ath9k_hw_btcoex_enable_3wire(ah);
 290                 break;
 291         }
 292
 293         REG_RMW(ah, AR_GPIO_PDPU,
 294                 (0x2 << (btcoex_hw->btactive_gpio * 2)),
 295                 (0x3 << (btcoex_hw->btactive_gpio * 2)));
 296
 297         ah->btcoex_hw.enabled = true;
 298 }
 299 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
 300
 301 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 302 {
 303         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 304         int i;
 305
 306         btcoex_hw->enabled = false;
 307         if (AR_SREV_9462(ah)) {
 308                 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
 309                 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 310                         REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 311                                   btcoex_hw->wlan_weight[i]);
 312                 return;
 313         }
 314         ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
 315
 316         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 317                         AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 318
 319         if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
 320                 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
 321                 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
 322
 323                 if (AR_SREV_9300_20_OR_LATER(ah)) {
 324                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
 325                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
 326                         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 327                                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 0);
 328                 } else
 329                         REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
 330
 331         }
 332 }
 333 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
 334
 335 static void ar9003_btcoex_bt_stomp(struct ath_hw *ah,
 336                          enum ath_stomp_type stomp_type)
 337 {
 338         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 339         const u32 *weight = ar9003_wlan_weights[stomp_type];
 340         int i;
 341
 342         if (AR_SREV_9462(ah)) {
 343                 if ((stomp_type == ATH_BTCOEX_STOMP_LOW) &&
 344                     btcoex->mci.stomp_ftp)
 345                         stomp_type = ATH_BTCOEX_STOMP_LOW_FTP;
 346                 weight = ar9462_wlan_weights[stomp_type];
 347         }
 348
 349         for (i = 0; i < AR9300_NUM_WLAN_WEIGHTS; i++) {
 350                 btcoex->bt_weight[i] = AR9300_BT_WGHT;
 351                 btcoex->wlan_weight[i] = weight[i];
 352         }
 353 }
 354
 355 /*
 356  * Configures appropriate weight based on stomp type.
 357  */
 358 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
 359                               enum ath_stomp_type stomp_type)
 360 {
 361         if (AR_SREV_9300_20_OR_LATER(ah)) {
 362                 ar9003_btcoex_bt_stomp(ah, stomp_type);
 363                 return;
 364         }
 365
 366         switch (stomp_type) {
 367         case ATH_BTCOEX_STOMP_ALL:
 368                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 369                                 AR_STOMP_ALL_WLAN_WGHT);
 370                 break;
 371         case ATH_BTCOEX_STOMP_LOW:
 372                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 373                                 AR_STOMP_LOW_WLAN_WGHT);
 374                 break;
 375         case ATH_BTCOEX_STOMP_NONE:
 376                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 377                                 AR_STOMP_NONE_WLAN_WGHT);
 378                 break;
 379         default:
 380                 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Invalid Stomptype\n");
 381                 break;
 382         }
 383 }
 384 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);