drivers/net/wireless/ath/ath9k/btcoex.h

   1 /*
   2  * Copyright (c) 2009 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 #ifndef BTCOEX_H
  18 #define BTCOEX_H
  19
  20 #define ATH_WLANACTIVE_GPIO     5
  21 #define ATH_BTACTIVE_GPIO       6
  22 #define ATH_BTPRIORITY_GPIO     7
  23
  24 #define ATH_BTCOEX_DEF_BT_PERIOD  45
  25 #define ATH_BTCOEX_DEF_DUTY_CYCLE 55
  26 #define ATH_BTCOEX_BMISS_THRESH   50
  27
  28 #define ATH_BT_PRIORITY_TIME_THRESHOLD 1000 /* ms */
  29 #define ATH_BT_CNT_THRESHOLD           3
  30
  31 enum ath_btcoex_scheme {
  32         ATH_BTCOEX_CFG_NONE,
  33         ATH_BTCOEX_CFG_2WIRE,
  34         ATH_BTCOEX_CFG_3WIRE,
  35 };
  36
  37 enum ath_stomp_type {
  38         ATH_BTCOEX_NO_STOMP,
  39         ATH_BTCOEX_STOMP_ALL,
  40         ATH_BTCOEX_STOMP_LOW,
  41         ATH_BTCOEX_STOMP_NONE
  42 };
  43
  44 enum ath_bt_mode {
  45         ATH_BT_COEX_MODE_LEGACY,        /* legacy rx_clear mode */
  46         ATH_BT_COEX_MODE_UNSLOTTED,     /* untimed/unslotted mode */
  47         ATH_BT_COEX_MODE_SLOTTED,       /* slotted mode */
  48         ATH_BT_COEX_MODE_DISALBED,      /* coexistence disabled */
  49 };
  50
  51 struct ath_btcoex_config {
  52         u8 bt_time_extend;
  53         bool bt_txstate_extend;
  54         bool bt_txframe_extend;
  55         enum ath_bt_mode bt_mode; /* coexistence mode */
  56         bool bt_quiet_collision;
  57         bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/
  58         u8 bt_priority_time;
  59         u8 bt_first_slot_time;
  60         bool bt_hold_rx_clear;
  61 };
  62
  63 struct ath_btcoex_info {
  64         enum ath_btcoex_scheme btcoex_scheme;
  65         u8 wlanactive_gpio;
  66         u8 btactive_gpio;
  67         u8 btpriority_gpio;
  68         u8 bt_duty_cycle;       /* BT duty cycle in percentage */
  69         int bt_stomp_type;      /* Types of BT stomping */
  70         u32 bt_coex_mode;       /* Register setting for AR_BT_COEX_MODE */
  71         u32 bt_coex_weights;    /* Register setting for AR_BT_COEX_WEIGHT */
  72         u32 bt_coex_mode2;      /* Register setting for AR_BT_COEX_MODE2 */
  73         u32 btcoex_no_stomp;   /* in usec */
  74         u32 btcoex_period;      /* in usec */
  75         u32 bt_priority_cnt;
  76         unsigned long bt_priority_time;
  77         bool hw_timer_enabled;
  78         spinlock_t btcoex_lock;
  79         struct timer_list period_timer;      /* Timer for BT period */
  80         struct ath_gen_timer *no_stomp_timer; /*Timer for no BT stomping*/
  81 };
  82
  83 bool ath_btcoex_supported(u16 subsysid);
  84 int ath9k_hw_btcoex_init(struct ath_hw *ah);
  85 void ath9k_hw_btcoex_enable(struct ath_hw *ah);
  86 void ath9k_hw_btcoex_disable(struct ath_hw *ah);
  87 void ath_btcoex_timer_resume(struct ath_softc *sc,
  88                              struct ath_btcoex_info *btinfo);
  89 void ath_btcoex_timer_pause(struct ath_softc *sc,
  90                             struct ath_btcoex_info *btinfo);
  91
  92 static inline void ath_btcoex_set_weight(struct ath_btcoex_info *btcoex_info,
  93                                          u32 bt_weight,
  94                                          u32 wlan_weight)
  95 {
  96         btcoex_info->bt_coex_weights = SM(bt_weight, AR_BTCOEX_BT_WGHT) |
  97                                        SM(wlan_weight, AR_BTCOEX_WL_WGHT);
  98 }
  99
 100 #endif