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         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 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
  92
  93 void ath9k_hw_btcoex_init_scheme(struct ath_hw *ah)
  94 {
  95         struct ath_common *common = ath9k_hw_common(ah);
  96         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
  97
  98         /*
  99          * Check if BTCOEX is globally disabled.
 100          */
 101         if (!common->btcoex_enabled) {
 102                 btcoex_hw->scheme = ATH_BTCOEX_CFG_NONE;
 103                 return;
 104         }
 105
 106         if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) {
 107                 btcoex_hw->scheme = ATH_BTCOEX_CFG_MCI;
 108         } else if (AR_SREV_9300_20_OR_LATER(ah)) {
 109                 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
 110                 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9300;
 111                 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9300;
 112                 btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9300;
 113         } else if (AR_SREV_9280_20_OR_LATER(ah)) {
 114                 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9280;
 115                 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9280;
 116
 117                 if (AR_SREV_9285(ah)) {
 118                         btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
 119                         btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9285;
 120                 } else {
 121                         btcoex_hw->scheme = ATH_BTCOEX_CFG_2WIRE;
 122                 }
 123         }
 124 }
 125 EXPORT_SYMBOL(ath9k_hw_btcoex_init_scheme);
 126
 127 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
 128 {
 129         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 130
 131         /* connect bt_active to baseband */
 132         REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 133                     (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
 134                      AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
 135
 136         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 137                     AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
 138
 139         /* Set input mux for bt_active to gpio pin */
 140         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 141                       AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 142                       btcoex_hw->btactive_gpio);
 143
 144         /* Configure the desired gpio port for input */
 145         ath9k_hw_gpio_request_in(ah, btcoex_hw->btactive_gpio,
 146                                  "ath9k-btactive");
 147 }
 148 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
 149
 150 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
 151 {
 152         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 153
 154         /* btcoex 3-wire */
 155         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 156                         (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
 157                          AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
 158
 159         /* Set input mux for bt_prority_async and
 160          *                  bt_active_async to GPIO pins */
 161         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 162                         AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 163                         btcoex_hw->btactive_gpio);
 164
 165         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 166                         AR_GPIO_INPUT_MUX1_BT_PRIORITY,
 167                         btcoex_hw->btpriority_gpio);
 168
 169         /* Configure the desired GPIO ports for input */
 170         ath9k_hw_gpio_request_in(ah, btcoex_hw->btactive_gpio,
 171                                  "ath9k-btactive");
 172         ath9k_hw_gpio_request_in(ah, btcoex_hw->btpriority_gpio,
 173                                  "ath9k-btpriority");
 174 }
 175 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
 176
 177 void ath9k_hw_btcoex_deinit(struct ath_hw *ah)
 178 {
 179         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 180
 181         ath9k_hw_gpio_free(ah, btcoex_hw->btactive_gpio);
 182         ath9k_hw_gpio_free(ah, btcoex_hw->btpriority_gpio);
 183         ath9k_hw_gpio_free(ah, btcoex_hw->wlanactive_gpio);
 184 }
 185 EXPORT_SYMBOL(ath9k_hw_btcoex_deinit);
 186
 187 void ath9k_hw_btcoex_init_mci(struct ath_hw *ah)
 188 {
 189         ah->btcoex_hw.mci.ready = false;
 190         ah->btcoex_hw.mci.bt_state = 0;
 191         ah->btcoex_hw.mci.bt_ver_major = 3;
 192         ah->btcoex_hw.mci.bt_ver_minor = 0;
 193         ah->btcoex_hw.mci.bt_version_known = false;
 194         ah->btcoex_hw.mci.update_2g5g = true;
 195         ah->btcoex_hw.mci.is_2g = true;
 196         ah->btcoex_hw.mci.wlan_channels_update = false;
 197         ah->btcoex_hw.mci.wlan_channels[0] = 0x00000000;
 198         ah->btcoex_hw.mci.wlan_channels[1] = 0xffffffff;
 199         ah->btcoex_hw.mci.wlan_channels[2] = 0xffffffff;
 200         ah->btcoex_hw.mci.wlan_channels[3] = 0x7fffffff;
 201         ah->btcoex_hw.mci.query_bt = true;
 202         ah->btcoex_hw.mci.unhalt_bt_gpm = true;
 203         ah->btcoex_hw.mci.halted_bt_gpm = false;
 204         ah->btcoex_hw.mci.need_flush_btinfo = false;
 205         ah->btcoex_hw.mci.wlan_cal_seq = 0;
 206         ah->btcoex_hw.mci.wlan_cal_done = 0;
 207         ah->btcoex_hw.mci.config = (AR_SREV_9462(ah)) ? 0x2201 : 0xa4c1;
 208 }
 209 EXPORT_SYMBOL(ath9k_hw_btcoex_init_mci);
 210
 211 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
 212 {
 213         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 214
 215         /* Configure the desired GPIO port for TX_FRAME output */
 216         ath9k_hw_gpio_request_out(ah, btcoex_hw->wlanactive_gpio,
 217                                   "ath9k-wlanactive",
 218                                   AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
 219 }
 220
 221 /*
 222  * For AR9002, bt_weight/wlan_weight are used.
 223  * For AR9003 and above, stomp_type is used.
 224  */
 225 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
 226                                 u32 bt_weight,
 227                                 u32 wlan_weight,
 228                                 enum ath_stomp_type stomp_type)
 229 {
 230         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 231         struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
 232         u8 txprio_shift[] = { 24, 16, 16, 0 }; /* tx priority weight */
 233         bool concur_tx = (mci_hw->concur_tx && btcoex_hw->tx_prio[stomp_type]);
 234         const u32 *weight = ar9003_wlan_weights[stomp_type];
 235         int i;
 236
 237         if (!AR_SREV_9300_20_OR_LATER(ah)) {
 238                 btcoex_hw->bt_coex_weights =
 239                         SM(bt_weight, AR_BTCOEX_BT_WGHT) |
 240                         SM(wlan_weight, AR_BTCOEX_WL_WGHT);
 241                 return;
 242         }
 243
 244         if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
 245                 enum ath_stomp_type stype =
 246                         ((stomp_type == ATH_BTCOEX_STOMP_LOW) &&
 247                          btcoex_hw->mci.stomp_ftp) ?
 248                         ATH_BTCOEX_STOMP_LOW_FTP : stomp_type;
 249                 weight = mci_wlan_weights[stype];
 250         }
 251
 252         for (i = 0; i < AR9300_NUM_WLAN_WEIGHTS; i++) {
 253                 btcoex_hw->bt_weight[i] = AR9300_BT_WGHT;
 254                 btcoex_hw->wlan_weight[i] = weight[i];
 255                 if (concur_tx && i) {
 256                         btcoex_hw->wlan_weight[i] &=
 257                                 ~(0xff << txprio_shift[i-1]);
 258                         btcoex_hw->wlan_weight[i] |=
 259                                 (btcoex_hw->tx_prio[stomp_type] <<
 260                                  txprio_shift[i-1]);
 261                 }
 262         }
 263         /* Last WLAN weight has to be adjusted wrt tx priority */
 264         if (concur_tx) {
 265                 btcoex_hw->wlan_weight[i-1] &= ~(0xff << txprio_shift[i-1]);
 266                 btcoex_hw->wlan_weight[i-1] |= (btcoex_hw->tx_prio[stomp_type]
 267                                                       << txprio_shift[i-1]);
 268         }
 269
 270 }
 271 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
 272
 273
 274 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
 275 {
 276         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 277         u32  val;
 278         int i;
 279
 280         /*
 281          * Program coex mode and weight registers to
 282          * enable coex 3-wire
 283          */
 284         REG_WRITE(ah, AR_BT_COEX_MODE, btcoex->bt_coex_mode);
 285         REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
 286
 287         if (AR_SREV_9300_20_OR_LATER(ah)) {
 288                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, btcoex->wlan_weight[0]);
 289                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, btcoex->wlan_weight[1]);
 290                 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 291                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i),
 292                                   btcoex->bt_weight[i]);
 293         } else
 294                 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex->bt_coex_weights);
 295
 296         if (AR_SREV_9271(ah)) {
 297                 val = REG_READ(ah, 0x50040);
 298                 val &= 0xFFFFFEFF;
 299                 REG_WRITE(ah, 0x50040, val);
 300         }
 301
 302         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 303         REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
 304
 305         ath9k_hw_gpio_request_out(ah, btcoex->wlanactive_gpio,
 306                                   "ath9k-wlanactive",
 307                                   AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
 308 }
 309
 310 static void ath9k_hw_btcoex_enable_mci(struct ath_hw *ah)
 311 {
 312         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 313         int i;
 314
 315         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 316                 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 317                           btcoex->wlan_weight[i]);
 318
 319         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 320         btcoex->enabled = true;
 321 }
 322
 323 static void ath9k_hw_btcoex_disable_mci(struct ath_hw *ah)
 324 {
 325         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 326         int i;
 327
 328         ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
 329
 330         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 331                 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 332                           btcoex_hw->wlan_weight[i]);
 333 }
 334
 335 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 336 {
 337         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 338
 339         switch (ath9k_hw_get_btcoex_scheme(ah)) {
 340         case ATH_BTCOEX_CFG_NONE:
 341                 return;
 342         case ATH_BTCOEX_CFG_2WIRE:
 343                 ath9k_hw_btcoex_enable_2wire(ah);
 344                 break;
 345         case ATH_BTCOEX_CFG_3WIRE:
 346                 ath9k_hw_btcoex_enable_3wire(ah);
 347                 break;
 348         case ATH_BTCOEX_CFG_MCI:
 349                 ath9k_hw_btcoex_enable_mci(ah);
 350                 break;
 351         }
 352
 353         if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI) {
 354                 REG_RMW(ah, AR_GPIO_PDPU,
 355                         (0x2 << (btcoex_hw->btactive_gpio * 2)),
 356                         (0x3 << (btcoex_hw->btactive_gpio * 2)));
 357         }
 358
 359         ah->btcoex_hw.enabled = true;
 360 }
 361 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
 362
 363 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 364 {
 365         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 366         int i;
 367
 368         btcoex_hw->enabled = false;
 369
 370         if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_MCI) {
 371                 ath9k_hw_btcoex_disable_mci(ah);
 372                 return;
 373         }
 374
 375         if (!AR_SREV_9300_20_OR_LATER(ah))
 376                 ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
 377
 378         ath9k_hw_gpio_request_out(ah, btcoex_hw->wlanactive_gpio,
 379                                   NULL, AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 380
 381         if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
 382                 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
 383                 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
 384
 385                 if (AR_SREV_9300_20_OR_LATER(ah)) {
 386                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
 387                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
 388                         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 389                                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 0);
 390                 } else
 391                         REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
 392
 393         }
 394 }
 395 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
 396
 397 /*
 398  * Configures appropriate weight based on stomp type.
 399  */
 400 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
 401                               enum ath_stomp_type stomp_type)
 402 {
 403         if (AR_SREV_9300_20_OR_LATER(ah)) {
 404                 ath9k_hw_btcoex_set_weight(ah, 0, 0, stomp_type);
 405                 return;
 406         }
 407
 408         switch (stomp_type) {
 409         case ATH_BTCOEX_STOMP_ALL:
 410                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 411                                            AR_STOMP_ALL_WLAN_WGHT, 0);
 412                 break;
 413         case ATH_BTCOEX_STOMP_LOW:
 414                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 415                                            AR_STOMP_LOW_WLAN_WGHT, 0);
 416                 break;
 417         case ATH_BTCOEX_STOMP_NONE:
 418                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 419                                            AR_STOMP_NONE_WLAN_WGHT, 0);
 420                 break;
 421         default:
 422                 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Invalid Stomptype\n");
 423                 break;
 424         }
 425 }
 426 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);
 427
 428 void ath9k_hw_btcoex_set_concur_txprio(struct ath_hw *ah, u8 *stomp_txprio)
 429 {
 430         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 431         int i;
 432
 433         for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++)
 434                 btcoex->tx_prio[i] = stomp_txprio[i];
 435 }
 436 EXPORT_SYMBOL(ath9k_hw_btcoex_set_concur_txprio);