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 "hw.h"
  18
  19 enum ath_bt_mode {
  20         ATH_BT_COEX_MODE_LEGACY,        /* legacy rx_clear mode */
  21         ATH_BT_COEX_MODE_UNSLOTTED,     /* untimed/unslotted mode */
  22         ATH_BT_COEX_MODE_SLOTTED,       /* slotted mode */
  23         ATH_BT_COEX_MODE_DISALBED,      /* coexistence disabled */
  24 };
  25
  26 struct ath_btcoex_config {
  27         u8 bt_time_extend;
  28         bool bt_txstate_extend;
  29         bool bt_txframe_extend;
  30         enum ath_bt_mode bt_mode; /* coexistence mode */
  31         bool bt_quiet_collision;
  32         bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/
  33         u8 bt_priority_time;
  34         u8 bt_first_slot_time;
  35         bool bt_hold_rx_clear;
  36 };
  37
  38
  39 void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
  40 {
  41         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
  42         const struct ath_btcoex_config ath_bt_config = {
  43                 .bt_time_extend = 0,
  44                 .bt_txstate_extend = true,
  45                 .bt_txframe_extend = true,
  46                 .bt_mode = ATH_BT_COEX_MODE_SLOTTED,
  47                 .bt_quiet_collision = true,
  48                 .bt_rxclear_polarity = true,
  49                 .bt_priority_time = 2,
  50                 .bt_first_slot_time = 5,
  51                 .bt_hold_rx_clear = true,
  52         };
  53         u32 i, idx;
  54         bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity;
  55
  56         if (AR_SREV_9300_20_OR_LATER(ah))
  57                 rxclear_polarity = !ath_bt_config.bt_rxclear_polarity;
  58
  59         btcoex_hw->bt_coex_mode =
  60                 (btcoex_hw->bt_coex_mode & AR_BT_QCU_THRESH) |
  61                 SM(ath_bt_config.bt_time_extend, AR_BT_TIME_EXTEND) |
  62                 SM(ath_bt_config.bt_txstate_extend, AR_BT_TXSTATE_EXTEND) |
  63                 SM(ath_bt_config.bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) |
  64                 SM(ath_bt_config.bt_mode, AR_BT_MODE) |
  65                 SM(ath_bt_config.bt_quiet_collision, AR_BT_QUIET) |
  66                 SM(rxclear_polarity, AR_BT_RX_CLEAR_POLARITY) |
  67                 SM(ath_bt_config.bt_priority_time, AR_BT_PRIORITY_TIME) |
  68                 SM(ath_bt_config.bt_first_slot_time, AR_BT_FIRST_SLOT_TIME) |
  69                 SM(qnum, AR_BT_QCU_THRESH);
  70
  71         btcoex_hw->bt_coex_mode2 =
  72                 SM(ath_bt_config.bt_hold_rx_clear, AR_BT_HOLD_RX_CLEAR) |
  73                 SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) |
  74                 AR_BT_DISABLE_BT_ANT;
  75
  76         for (i = 0; i < 32; i++) {
  77                 idx = (debruijn32 << i) >> 27;
  78                 ah->hw_gen_timers.gen_timer_index[idx] = i;
  79         }
  80 }
  81 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
  82
  83 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
  84 {
  85         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
  86
  87         /* connect bt_active to baseband */
  88         REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
  89                     (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
  90                      AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
  91
  92         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
  93                     AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
  94
  95         /* Set input mux for bt_active to gpio pin */
  96         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
  97                       AR_GPIO_INPUT_MUX1_BT_ACTIVE,
  98                       btcoex_hw->btactive_gpio);
  99
 100         /* Configure the desired gpio port for input */
 101         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
 102 }
 103 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
 104
 105 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
 106 {
 107         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 108
 109         /* btcoex 3-wire */
 110         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 111                         (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
 112                          AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
 113
 114         /* Set input mux for bt_prority_async and
 115          *                  bt_active_async to GPIO pins */
 116         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 117                         AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 118                         btcoex_hw->btactive_gpio);
 119
 120         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 121                         AR_GPIO_INPUT_MUX1_BT_PRIORITY,
 122                         btcoex_hw->btpriority_gpio);
 123
 124         /* Configure the desired GPIO ports for input */
 125
 126         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
 127         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btpriority_gpio);
 128 }
 129 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
 130
 131 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
 132 {
 133         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 134
 135         /* Configure the desired GPIO port for TX_FRAME output */
 136         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 137                             AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
 138 }
 139
 140 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
 141                                 u32 bt_weight,
 142                                 u32 wlan_weight)
 143 {
 144         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 145
 146         btcoex_hw->bt_coex_weights = SM(bt_weight, AR_BTCOEX_BT_WGHT) |
 147                                      SM(wlan_weight, AR_BTCOEX_WL_WGHT);
 148 }
 149 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
 150
 151
 152 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
 153 {
 154         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 155         u32  val;
 156
 157         /*
 158          * Program coex mode and weight registers to
 159          * enable coex 3-wire
 160          */
 161         REG_WRITE(ah, AR_BT_COEX_MODE, btcoex_hw->bt_coex_mode);
 162         REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex_hw->bt_coex_mode2);
 163
 164
 165         if (AR_SREV_9300_20_OR_LATER(ah)) {
 166                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, ah->bt_coex_wlan_weight[0]);
 167                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, ah->bt_coex_wlan_weight[1]);
 168                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS0, ah->bt_coex_bt_weight[0]);
 169                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS1, ah->bt_coex_bt_weight[1]);
 170                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS2, ah->bt_coex_bt_weight[2]);
 171                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS3, ah->bt_coex_bt_weight[3]);
 172
 173         } else
 174                 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex_hw->bt_coex_weights);
 175
 176
 177
 178         if (AR_SREV_9271(ah)) {
 179                 val = REG_READ(ah, 0x50040);
 180                 val &= 0xFFFFFEFF;
 181                 REG_WRITE(ah, 0x50040, val);
 182         }
 183
 184         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 185         REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
 186
 187         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 188                             AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
 189 }
 190
 191 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 192 {
 193         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 194
 195         switch (btcoex_hw->scheme) {
 196         case ATH_BTCOEX_CFG_NONE:
 197                 break;
 198         case ATH_BTCOEX_CFG_2WIRE:
 199                 ath9k_hw_btcoex_enable_2wire(ah);
 200                 break;
 201         case ATH_BTCOEX_CFG_3WIRE:
 202                 ath9k_hw_btcoex_enable_3wire(ah);
 203                 break;
 204         }
 205
 206         REG_RMW(ah, AR_GPIO_PDPU,
 207                 (0x2 << (btcoex_hw->btactive_gpio * 2)),
 208                 (0x3 << (btcoex_hw->btactive_gpio * 2)));
 209
 210         ah->btcoex_hw.enabled = true;
 211 }
 212 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
 213
 214 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 215 {
 216         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 217
 218         ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
 219
 220         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 221                         AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 222
 223         if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
 224                 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
 225                 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
 226
 227                 if (AR_SREV_9300_20_OR_LATER(ah)) {
 228                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
 229                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
 230                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS0, 0);
 231                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS1, 0);
 232                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS2, 0);
 233                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS3, 0);
 234                 } else
 235                         REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
 236
 237         }
 238
 239         ah->btcoex_hw.enabled = false;
 240 }
 241 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
 242
 243 static void ar9003_btcoex_bt_stomp(struct ath_hw *ah,
 244                          enum ath_stomp_type stomp_type)
 245 {
 246         ah->bt_coex_bt_weight[0] = AR9300_BT_WGHT;
 247         ah->bt_coex_bt_weight[1] = AR9300_BT_WGHT;
 248         ah->bt_coex_bt_weight[2] = AR9300_BT_WGHT;
 249         ah->bt_coex_bt_weight[3] = AR9300_BT_WGHT;
 250
 251
 252         switch (stomp_type) {
 253         case ATH_BTCOEX_STOMP_ALL:
 254                 ah->bt_coex_wlan_weight[0] = AR9300_STOMP_ALL_WLAN_WGHT0;
 255                 ah->bt_coex_wlan_weight[1] = AR9300_STOMP_ALL_WLAN_WGHT1;
 256                 break;
 257         case ATH_BTCOEX_STOMP_LOW:
 258                 ah->bt_coex_wlan_weight[0] = AR9300_STOMP_LOW_WLAN_WGHT0;
 259                 ah->bt_coex_wlan_weight[1] = AR9300_STOMP_LOW_WLAN_WGHT1;
 260                 break;
 261         case ATH_BTCOEX_STOMP_NONE:
 262                 ah->bt_coex_wlan_weight[0] = AR9300_STOMP_NONE_WLAN_WGHT0;
 263                 ah->bt_coex_wlan_weight[1] = AR9300_STOMP_NONE_WLAN_WGHT1;
 264                 break;
 265
 266         default:
 267                 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
 268                                 "Invalid Stomptype\n");
 269                 break;
 270         }
 271
 272         ath9k_hw_btcoex_enable(ah);
 273 }
 274
 275 /*
 276  * Configures appropriate weight based on stomp type.
 277  */
 278 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
 279                               enum ath_stomp_type stomp_type)
 280 {
 281         if (AR_SREV_9300_20_OR_LATER(ah)) {
 282                 ar9003_btcoex_bt_stomp(ah, stomp_type);
 283                 return;
 284         }
 285
 286         switch (stomp_type) {
 287         case ATH_BTCOEX_STOMP_ALL:
 288                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 289                                 AR_STOMP_ALL_WLAN_WGHT);
 290                 break;
 291         case ATH_BTCOEX_STOMP_LOW:
 292                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 293                                 AR_STOMP_LOW_WLAN_WGHT);
 294                 break;
 295         case ATH_BTCOEX_STOMP_NONE:
 296                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 297                                 AR_STOMP_NONE_WLAN_WGHT);
 298                 break;
 299         default:
 300                 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
 301                                 "Invalid Stomptype\n");
 302                 break;
 303         }
 304
 305         ath9k_hw_btcoex_enable(ah);
 306 }
 307 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);