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 };
  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 /*
 212  * For AR9002, bt_weight/wlan_weight are used.
 213  * For AR9003 and above, stomp_type is used.
 214  */
 215 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
 216                                 u32 bt_weight,
 217                                 u32 wlan_weight,
 218                                 enum ath_stomp_type stomp_type)
 219 {
 220         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 221
 222         if (AR_SREV_9300_20_OR_LATER(ah)) {
 223                 const u32 *weight = ar9003_wlan_weights[stomp_type];
 224                 int i;
 225
 226                 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
 227                         if ((stomp_type == ATH_BTCOEX_STOMP_LOW) &&
 228                             btcoex_hw->mci.stomp_ftp)
 229                                 stomp_type = ATH_BTCOEX_STOMP_LOW_FTP;
 230                         weight = mci_wlan_weights[stomp_type];
 231                 }
 232
 233                 for (i = 0; i < AR9300_NUM_WLAN_WEIGHTS; i++) {
 234                         btcoex_hw->bt_weight[i] = AR9300_BT_WGHT;
 235                         btcoex_hw->wlan_weight[i] = weight[i];
 236                 }
 237         } else {
 238                 btcoex_hw->bt_coex_weights =
 239                         SM(bt_weight, AR_BTCOEX_BT_WGHT) |
 240                         SM(wlan_weight, AR_BTCOEX_WL_WGHT);
 241         }
 242 }
 243 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
 244
 245
 246 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
 247 {
 248         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 249         u32  val;
 250         int i;
 251
 252         /*
 253          * Program coex mode and weight registers to
 254          * enable coex 3-wire
 255          */
 256         REG_WRITE(ah, AR_BT_COEX_MODE, btcoex->bt_coex_mode);
 257         REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
 258
 259
 260         if (AR_SREV_9300_20_OR_LATER(ah)) {
 261                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, btcoex->wlan_weight[0]);
 262                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, btcoex->wlan_weight[1]);
 263                 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 264                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i),
 265                                   btcoex->bt_weight[i]);
 266         } else
 267                 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex->bt_coex_weights);
 268
 269
 270
 271         if (AR_SREV_9271(ah)) {
 272                 val = REG_READ(ah, 0x50040);
 273                 val &= 0xFFFFFEFF;
 274                 REG_WRITE(ah, 0x50040, val);
 275         }
 276
 277         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 278         REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
 279
 280         ath9k_hw_cfg_output(ah, btcoex->wlanactive_gpio,
 281                             AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
 282 }
 283
 284 static void ath9k_hw_btcoex_enable_mci(struct ath_hw *ah)
 285 {
 286         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 287         int i;
 288
 289         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 290                 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 291                           btcoex->wlan_weight[i]);
 292
 293         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 294         btcoex->enabled = true;
 295 }
 296
 297 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 298 {
 299         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 300
 301         switch (ath9k_hw_get_btcoex_scheme(ah)) {
 302         case ATH_BTCOEX_CFG_NONE:
 303                 return;
 304         case ATH_BTCOEX_CFG_2WIRE:
 305                 ath9k_hw_btcoex_enable_2wire(ah);
 306                 break;
 307         case ATH_BTCOEX_CFG_3WIRE:
 308                 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
 309                         ath9k_hw_btcoex_enable_mci(ah);
 310                         return;
 311                 }
 312                 ath9k_hw_btcoex_enable_3wire(ah);
 313                 break;
 314         }
 315
 316         REG_RMW(ah, AR_GPIO_PDPU,
 317                 (0x2 << (btcoex_hw->btactive_gpio * 2)),
 318                 (0x3 << (btcoex_hw->btactive_gpio * 2)));
 319
 320         ah->btcoex_hw.enabled = true;
 321 }
 322 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
 323
 324 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 325 {
 326         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 327         int i;
 328
 329         btcoex_hw->enabled = false;
 330         if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
 331                 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
 332                 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 333                         REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 334                                   btcoex_hw->wlan_weight[i]);
 335                 return;
 336         }
 337         ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
 338
 339         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 340                         AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 341
 342         if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
 343                 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
 344                 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
 345
 346                 if (AR_SREV_9300_20_OR_LATER(ah)) {
 347                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
 348                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
 349                         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 350                                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 0);
 351                 } else
 352                         REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
 353
 354         }
 355 }
 356 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
 357
 358 /*
 359  * Configures appropriate weight based on stomp type.
 360  */
 361 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
 362                               enum ath_stomp_type stomp_type)
 363 {
 364         if (AR_SREV_9300_20_OR_LATER(ah)) {
 365                 ath9k_hw_btcoex_set_weight(ah, 0, 0, stomp_type);
 366                 return;
 367         }
 368
 369         switch (stomp_type) {
 370         case ATH_BTCOEX_STOMP_ALL:
 371                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 372                                            AR_STOMP_ALL_WLAN_WGHT, 0);
 373                 break;
 374         case ATH_BTCOEX_STOMP_LOW:
 375                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 376                                            AR_STOMP_LOW_WLAN_WGHT, 0);
 377                 break;
 378         case ATH_BTCOEX_STOMP_NONE:
 379                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 380                                            AR_STOMP_NONE_WLAN_WGHT, 0);
 381                 break;
 382         default:
 383                 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Invalid Stomptype\n");
 384                 break;
 385         }
 386 }
 387 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);