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 (AR_SREV_9300_20_OR_LATER(ah)) {
 107                 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
 108                 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9300;
 109                 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9300;
 110                 btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9300;
 111         } else if (AR_SREV_9280_20_OR_LATER(ah)) {
 112                 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9280;
 113                 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9280;
 114
 115                 if (AR_SREV_9285(ah)) {
 116                         btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
 117                         btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9285;
 118                 } else {
 119                         btcoex_hw->scheme = ATH_BTCOEX_CFG_2WIRE;
 120                 }
 121         }
 122 }
 123 EXPORT_SYMBOL(ath9k_hw_btcoex_init_scheme);
 124
 125 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
 126 {
 127         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 128
 129         /* connect bt_active to baseband */
 130         REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 131                     (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
 132                      AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
 133
 134         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 135                     AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
 136
 137         /* Set input mux for bt_active to gpio pin */
 138         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 139                       AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 140                       btcoex_hw->btactive_gpio);
 141
 142         /* Configure the desired gpio port for input */
 143         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
 144 }
 145 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
 146
 147 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
 148 {
 149         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 150
 151         /* btcoex 3-wire */
 152         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 153                         (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
 154                          AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
 155
 156         /* Set input mux for bt_prority_async and
 157          *                  bt_active_async to GPIO pins */
 158         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 159                         AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 160                         btcoex_hw->btactive_gpio);
 161
 162         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 163                         AR_GPIO_INPUT_MUX1_BT_PRIORITY,
 164                         btcoex_hw->btpriority_gpio);
 165
 166         /* Configure the desired GPIO ports for input */
 167
 168         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
 169         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btpriority_gpio);
 170 }
 171 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
 172
 173 void ath9k_hw_btcoex_init_mci(struct ath_hw *ah)
 174 {
 175         ah->btcoex_hw.mci.ready = false;
 176         ah->btcoex_hw.mci.bt_state = 0;
 177         ah->btcoex_hw.mci.bt_ver_major = 3;
 178         ah->btcoex_hw.mci.bt_ver_minor = 0;
 179         ah->btcoex_hw.mci.bt_version_known = false;
 180         ah->btcoex_hw.mci.update_2g5g = true;
 181         ah->btcoex_hw.mci.is_2g = true;
 182         ah->btcoex_hw.mci.wlan_channels_update = false;
 183         ah->btcoex_hw.mci.wlan_channels[0] = 0x00000000;
 184         ah->btcoex_hw.mci.wlan_channels[1] = 0xffffffff;
 185         ah->btcoex_hw.mci.wlan_channels[2] = 0xffffffff;
 186         ah->btcoex_hw.mci.wlan_channels[3] = 0x7fffffff;
 187         ah->btcoex_hw.mci.query_bt = true;
 188         ah->btcoex_hw.mci.unhalt_bt_gpm = true;
 189         ah->btcoex_hw.mci.halted_bt_gpm = false;
 190         ah->btcoex_hw.mci.need_flush_btinfo = false;
 191         ah->btcoex_hw.mci.wlan_cal_seq = 0;
 192         ah->btcoex_hw.mci.wlan_cal_done = 0;
 193         ah->btcoex_hw.mci.config = (AR_SREV_9462(ah)) ? 0x2201 : 0xa4c1;
 194 }
 195 EXPORT_SYMBOL(ath9k_hw_btcoex_init_mci);
 196
 197 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
 198 {
 199         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 200
 201         /* Configure the desired GPIO port for TX_FRAME output */
 202         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 203                             AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
 204 }
 205
 206 /*
 207  * For AR9002, bt_weight/wlan_weight are used.
 208  * For AR9003 and above, stomp_type is used.
 209  */
 210 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
 211                                 u32 bt_weight,
 212                                 u32 wlan_weight,
 213                                 enum ath_stomp_type stomp_type)
 214 {
 215         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 216         struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
 217         u8 txprio_shift[] = { 24, 16, 16, 0 }; /* tx priority weight */
 218         bool concur_tx = (mci_hw->concur_tx && btcoex_hw->tx_prio[stomp_type]);
 219         const u32 *weight = ar9003_wlan_weights[stomp_type];
 220         int i;
 221
 222         if (!AR_SREV_9300_20_OR_LATER(ah)) {
 223                 btcoex_hw->bt_coex_weights =
 224                         SM(bt_weight, AR_BTCOEX_BT_WGHT) |
 225                         SM(wlan_weight, AR_BTCOEX_WL_WGHT);
 226                 return;
 227         }
 228
 229         if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
 230                 enum ath_stomp_type stype =
 231                         ((stomp_type == ATH_BTCOEX_STOMP_LOW) &&
 232                          btcoex_hw->mci.stomp_ftp) ?
 233                         ATH_BTCOEX_STOMP_LOW_FTP : stomp_type;
 234                 weight = mci_wlan_weights[stype];
 235         }
 236
 237         for (i = 0; i < AR9300_NUM_WLAN_WEIGHTS; i++) {
 238                 btcoex_hw->bt_weight[i] = AR9300_BT_WGHT;
 239                 btcoex_hw->wlan_weight[i] = weight[i];
 240                 if (concur_tx && i) {
 241                         btcoex_hw->wlan_weight[i] &=
 242                                 ~(0xff << txprio_shift[i-1]);
 243                         btcoex_hw->wlan_weight[i] |=
 244                                 (btcoex_hw->tx_prio[stomp_type] <<
 245                                  txprio_shift[i-1]);
 246                 }
 247         }
 248         /* Last WLAN weight has to be adjusted wrt tx priority */
 249         if (concur_tx) {
 250                 btcoex_hw->wlan_weight[i-1] &= ~(0xff << txprio_shift[i-1]);
 251                 btcoex_hw->wlan_weight[i-1] |= (btcoex_hw->tx_prio[stomp_type]
 252                                                       << txprio_shift[i-1]);
 253         }
 254
 255 }
 256 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
 257
 258
 259 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
 260 {
 261         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 262         u32  val;
 263         int i;
 264
 265         /*
 266          * Program coex mode and weight registers to
 267          * enable coex 3-wire
 268          */
 269         REG_WRITE(ah, AR_BT_COEX_MODE, btcoex->bt_coex_mode);
 270         REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
 271
 272
 273         if (AR_SREV_9300_20_OR_LATER(ah)) {
 274                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, btcoex->wlan_weight[0]);
 275                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, btcoex->wlan_weight[1]);
 276                 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 277                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i),
 278                                   btcoex->bt_weight[i]);
 279         } else
 280                 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex->bt_coex_weights);
 281
 282
 283
 284         if (AR_SREV_9271(ah)) {
 285                 val = REG_READ(ah, 0x50040);
 286                 val &= 0xFFFFFEFF;
 287                 REG_WRITE(ah, 0x50040, val);
 288         }
 289
 290         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 291         REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
 292
 293         ath9k_hw_cfg_output(ah, btcoex->wlanactive_gpio,
 294                             AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
 295 }
 296
 297 static void ath9k_hw_btcoex_enable_mci(struct ath_hw *ah)
 298 {
 299         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 300         int i;
 301
 302         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 303                 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 304                           btcoex->wlan_weight[i]);
 305
 306         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 307         btcoex->enabled = true;
 308 }
 309
 310 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 311 {
 312         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 313
 314         switch (ath9k_hw_get_btcoex_scheme(ah)) {
 315         case ATH_BTCOEX_CFG_NONE:
 316                 return;
 317         case ATH_BTCOEX_CFG_2WIRE:
 318                 ath9k_hw_btcoex_enable_2wire(ah);
 319                 break;
 320         case ATH_BTCOEX_CFG_3WIRE:
 321                 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
 322                         ath9k_hw_btcoex_enable_mci(ah);
 323                         return;
 324                 }
 325                 ath9k_hw_btcoex_enable_3wire(ah);
 326                 break;
 327         }
 328
 329         REG_RMW(ah, AR_GPIO_PDPU,
 330                 (0x2 << (btcoex_hw->btactive_gpio * 2)),
 331                 (0x3 << (btcoex_hw->btactive_gpio * 2)));
 332
 333         ah->btcoex_hw.enabled = true;
 334 }
 335 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
 336
 337 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 338 {
 339         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 340         int i;
 341
 342         btcoex_hw->enabled = false;
 343         if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
 344                 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
 345                 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 346                         REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
 347                                   btcoex_hw->wlan_weight[i]);
 348                 return;
 349         }
 350         ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
 351
 352         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 353                         AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 354
 355         if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
 356                 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
 357                 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
 358
 359                 if (AR_SREV_9300_20_OR_LATER(ah)) {
 360                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
 361                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
 362                         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 363                                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 0);
 364                 } else
 365                         REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
 366
 367         }
 368 }
 369 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
 370
 371 /*
 372  * Configures appropriate weight based on stomp type.
 373  */
 374 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
 375                               enum ath_stomp_type stomp_type)
 376 {
 377         if (AR_SREV_9300_20_OR_LATER(ah)) {
 378                 ath9k_hw_btcoex_set_weight(ah, 0, 0, stomp_type);
 379                 return;
 380         }
 381
 382         switch (stomp_type) {
 383         case ATH_BTCOEX_STOMP_ALL:
 384                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 385                                            AR_STOMP_ALL_WLAN_WGHT, 0);
 386                 break;
 387         case ATH_BTCOEX_STOMP_LOW:
 388                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 389                                            AR_STOMP_LOW_WLAN_WGHT, 0);
 390                 break;
 391         case ATH_BTCOEX_STOMP_NONE:
 392                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 393                                            AR_STOMP_NONE_WLAN_WGHT, 0);
 394                 break;
 395         default:
 396                 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Invalid Stomptype\n");
 397                 break;
 398         }
 399 }
 400 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);
 401
 402 void ath9k_hw_btcoex_set_concur_txprio(struct ath_hw *ah, u8 *stomp_txprio)
 403 {
 404         struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 405         int i;
 406
 407         for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++)
 408                 btcoex->tx_prio[i] = stomp_txprio[i];
 409 }
 410 EXPORT_SYMBOL(ath9k_hw_btcoex_set_concur_txprio);