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;
  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                 ah->hw_gen_timers.gen_timer_index[(debruijn32 << i) >> 27] = i;
  78 }
  79 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
  80
  81 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
  82 {
  83         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
  84
  85         /* connect bt_active to baseband */
  86         REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
  87                     (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
  88                      AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
  89
  90         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
  91                     AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
  92
  93         /* Set input mux for bt_active to gpio pin */
  94         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
  95                       AR_GPIO_INPUT_MUX1_BT_ACTIVE,
  96                       btcoex_hw->btactive_gpio);
  97
  98         /* Configure the desired gpio port for input */
  99         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
 100 }
 101 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
 102
 103 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
 104 {
 105         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 106
 107         /* btcoex 3-wire */
 108         REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 109                         (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
 110                          AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
 111
 112         /* Set input mux for bt_prority_async and
 113          *                  bt_active_async to GPIO pins */
 114         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 115                         AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 116                         btcoex_hw->btactive_gpio);
 117
 118         REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 119                         AR_GPIO_INPUT_MUX1_BT_PRIORITY,
 120                         btcoex_hw->btpriority_gpio);
 121
 122         /* Configure the desired GPIO ports for input */
 123
 124         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
 125         ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btpriority_gpio);
 126 }
 127 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
 128
 129 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
 130 {
 131         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 132
 133         /* Configure the desired GPIO port for TX_FRAME output */
 134         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 135                             AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
 136 }
 137
 138 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
 139                                 u32 bt_weight,
 140                                 u32 wlan_weight)
 141 {
 142         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 143
 144         btcoex_hw->bt_coex_weights = SM(bt_weight, AR_BTCOEX_BT_WGHT) |
 145                                      SM(wlan_weight, AR_BTCOEX_WL_WGHT);
 146 }
 147 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
 148
 149
 150 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
 151 {
 152         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 153         u32  val;
 154
 155         /*
 156          * Program coex mode and weight registers to
 157          * enable coex 3-wire
 158          */
 159         REG_WRITE(ah, AR_BT_COEX_MODE, btcoex_hw->bt_coex_mode);
 160         REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex_hw->bt_coex_mode2);
 161
 162
 163         if (AR_SREV_9300_20_OR_LATER(ah)) {
 164                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, ah->bt_coex_wlan_weight[0]);
 165                 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, ah->bt_coex_wlan_weight[1]);
 166                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS0, ah->bt_coex_bt_weight[0]);
 167                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS1, ah->bt_coex_bt_weight[1]);
 168                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS2, ah->bt_coex_bt_weight[2]);
 169                 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS3, ah->bt_coex_bt_weight[3]);
 170
 171         } else
 172                 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex_hw->bt_coex_weights);
 173
 174
 175
 176         if (AR_SREV_9271(ah)) {
 177                 val = REG_READ(ah, 0x50040);
 178                 val &= 0xFFFFFEFF;
 179                 REG_WRITE(ah, 0x50040, val);
 180         }
 181
 182         REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 183         REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
 184
 185         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 186                             AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
 187 }
 188
 189 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 190 {
 191         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 192
 193         switch (btcoex_hw->scheme) {
 194         case ATH_BTCOEX_CFG_NONE:
 195                 break;
 196         case ATH_BTCOEX_CFG_2WIRE:
 197                 ath9k_hw_btcoex_enable_2wire(ah);
 198                 break;
 199         case ATH_BTCOEX_CFG_3WIRE:
 200                 ath9k_hw_btcoex_enable_3wire(ah);
 201                 break;
 202         }
 203
 204         REG_RMW(ah, AR_GPIO_PDPU,
 205                 (0x2 << (btcoex_hw->btactive_gpio * 2)),
 206                 (0x3 << (btcoex_hw->btactive_gpio * 2)));
 207
 208         ah->btcoex_hw.enabled = true;
 209 }
 210 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
 211
 212 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 213 {
 214         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 215
 216         ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
 217
 218         ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 219                         AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 220
 221         if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
 222                 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
 223                 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
 224
 225                 if (AR_SREV_9300_20_OR_LATER(ah)) {
 226                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
 227                         REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
 228                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS0, 0);
 229                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS1, 0);
 230                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS2, 0);
 231                         REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS3, 0);
 232                 } else
 233                         REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
 234
 235         }
 236
 237         ah->btcoex_hw.enabled = false;
 238 }
 239 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
 240
 241 static void ar9003_btcoex_bt_stomp(struct ath_hw *ah,
 242                          enum ath_stomp_type stomp_type)
 243 {
 244         ah->bt_coex_bt_weight[0] = AR9300_BT_WGHT;
 245         ah->bt_coex_bt_weight[1] = AR9300_BT_WGHT;
 246         ah->bt_coex_bt_weight[2] = AR9300_BT_WGHT;
 247         ah->bt_coex_bt_weight[3] = AR9300_BT_WGHT;
 248
 249
 250         switch (stomp_type) {
 251         case ATH_BTCOEX_STOMP_ALL:
 252                 ah->bt_coex_wlan_weight[0] = AR9300_STOMP_ALL_WLAN_WGHT0;
 253                 ah->bt_coex_wlan_weight[1] = AR9300_STOMP_ALL_WLAN_WGHT1;
 254                 break;
 255         case ATH_BTCOEX_STOMP_LOW:
 256                 ah->bt_coex_wlan_weight[0] = AR9300_STOMP_LOW_WLAN_WGHT0;
 257                 ah->bt_coex_wlan_weight[1] = AR9300_STOMP_LOW_WLAN_WGHT1;
 258                 break;
 259         case ATH_BTCOEX_STOMP_NONE:
 260                 ah->bt_coex_wlan_weight[0] = AR9300_STOMP_NONE_WLAN_WGHT0;
 261                 ah->bt_coex_wlan_weight[1] = AR9300_STOMP_NONE_WLAN_WGHT1;
 262                 break;
 263
 264         default:
 265                 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
 266                                 "Invalid Stomptype\n");
 267                 break;
 268         }
 269
 270         ath9k_hw_btcoex_enable(ah);
 271 }
 272
 273 /*
 274  * Configures appropriate weight based on stomp type.
 275  */
 276 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
 277                               enum ath_stomp_type stomp_type)
 278 {
 279         if (AR_SREV_9300_20_OR_LATER(ah)) {
 280                 ar9003_btcoex_bt_stomp(ah, stomp_type);
 281                 return;
 282         }
 283
 284         switch (stomp_type) {
 285         case ATH_BTCOEX_STOMP_ALL:
 286                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 287                                 AR_STOMP_ALL_WLAN_WGHT);
 288                 break;
 289         case ATH_BTCOEX_STOMP_LOW:
 290                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 291                                 AR_STOMP_LOW_WLAN_WGHT);
 292                 break;
 293         case ATH_BTCOEX_STOMP_NONE:
 294                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 295                                 AR_STOMP_NONE_WLAN_WGHT);
 296                 break;
 297         default:
 298                 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
 299                                 "Invalid Stomptype\n");
 300                 break;
 301         }
 302
 303         ath9k_hw_btcoex_enable(ah);
 304 }
 305 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);