Vivek Natarajan | 21cb987 | 2010-08-18 19:57:49 +0530 | [diff] [blame] | 1 | #include "htc.h" |
| 2 | |
| 3 | /******************/ |
| 4 | /* BTCOEX */ |
| 5 | /******************/ |
| 6 | |
| 7 | /* |
| 8 | * Detects if there is any priority bt traffic |
| 9 | */ |
| 10 | static void ath_detect_bt_priority(struct ath9k_htc_priv *priv) |
| 11 | { |
| 12 | struct ath_btcoex *btcoex = &priv->btcoex; |
| 13 | struct ath_hw *ah = priv->ah; |
| 14 | |
| 15 | if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio)) |
| 16 | btcoex->bt_priority_cnt++; |
| 17 | |
| 18 | if (time_after(jiffies, btcoex->bt_priority_time + |
| 19 | msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) { |
| 20 | priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN); |
| 21 | /* Detect if colocated bt started scanning */ |
| 22 | if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { |
Joe Perches | 226afe6 | 2010-12-02 19:12:37 -0800 | [diff] [blame] | 23 | ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX, |
| 24 | "BT scan detected\n"); |
Vivek Natarajan | 21cb987 | 2010-08-18 19:57:49 +0530 | [diff] [blame] | 25 | priv->op_flags |= (OP_BT_SCAN | |
| 26 | OP_BT_PRIORITY_DETECTED); |
| 27 | } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { |
Joe Perches | 226afe6 | 2010-12-02 19:12:37 -0800 | [diff] [blame] | 28 | ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX, |
| 29 | "BT priority traffic detected\n"); |
Vivek Natarajan | 21cb987 | 2010-08-18 19:57:49 +0530 | [diff] [blame] | 30 | priv->op_flags |= OP_BT_PRIORITY_DETECTED; |
| 31 | } |
| 32 | |
| 33 | btcoex->bt_priority_cnt = 0; |
| 34 | btcoex->bt_priority_time = jiffies; |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | /* |
| 39 | * This is the master bt coex work which runs for every |
| 40 | * 45ms, bt traffic will be given priority during 55% of this |
| 41 | * period while wlan gets remaining 45% |
| 42 | */ |
| 43 | static void ath_btcoex_period_work(struct work_struct *work) |
| 44 | { |
| 45 | struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, |
| 46 | coex_period_work.work); |
| 47 | struct ath_btcoex *btcoex = &priv->btcoex; |
| 48 | struct ath_common *common = ath9k_hw_common(priv->ah); |
| 49 | u32 timer_period; |
| 50 | bool is_btscan; |
| 51 | int ret; |
| 52 | u8 cmd_rsp, aggr; |
| 53 | |
| 54 | ath_detect_bt_priority(priv); |
| 55 | |
| 56 | is_btscan = !!(priv->op_flags & OP_BT_SCAN); |
| 57 | |
| 58 | aggr = priv->op_flags & OP_BT_PRIORITY_DETECTED; |
| 59 | |
| 60 | WMI_CMD_BUF(WMI_AGGR_LIMIT_CMD, &aggr); |
| 61 | |
| 62 | ath9k_cmn_btcoex_bt_stomp(common, is_btscan ? ATH_BTCOEX_STOMP_ALL : |
| 63 | btcoex->bt_stomp_type); |
| 64 | |
| 65 | timer_period = is_btscan ? btcoex->btscan_no_stomp : |
| 66 | btcoex->btcoex_no_stomp; |
| 67 | ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work, |
| 68 | msecs_to_jiffies(timer_period)); |
| 69 | ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, |
| 70 | msecs_to_jiffies(btcoex->btcoex_period)); |
| 71 | } |
| 72 | |
| 73 | /* |
| 74 | * Work to time slice between wlan and bt traffic and |
| 75 | * configure weight registers |
| 76 | */ |
| 77 | static void ath_btcoex_duty_cycle_work(struct work_struct *work) |
| 78 | { |
| 79 | struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, |
| 80 | duty_cycle_work.work); |
| 81 | struct ath_hw *ah = priv->ah; |
| 82 | struct ath_btcoex *btcoex = &priv->btcoex; |
| 83 | struct ath_common *common = ath9k_hw_common(ah); |
| 84 | bool is_btscan = priv->op_flags & OP_BT_SCAN; |
| 85 | |
Joe Perches | 226afe6 | 2010-12-02 19:12:37 -0800 | [diff] [blame] | 86 | ath_dbg(common, ATH_DBG_BTCOEX, |
| 87 | "time slice work for bt and wlan\n"); |
Vivek Natarajan | 21cb987 | 2010-08-18 19:57:49 +0530 | [diff] [blame] | 88 | |
| 89 | if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan) |
| 90 | ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_NONE); |
| 91 | else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) |
| 92 | ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_LOW); |
| 93 | } |
| 94 | |
| 95 | void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv) |
| 96 | { |
| 97 | struct ath_btcoex *btcoex = &priv->btcoex; |
| 98 | |
| 99 | btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD; |
| 100 | btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * |
| 101 | btcoex->btcoex_period / 100; |
| 102 | btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * |
| 103 | btcoex->btcoex_period / 100; |
| 104 | INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work); |
| 105 | INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work); |
| 106 | } |
| 107 | |
| 108 | /* |
| 109 | * (Re)start btcoex work |
| 110 | */ |
| 111 | |
| 112 | void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv) |
| 113 | { |
| 114 | struct ath_btcoex *btcoex = &priv->btcoex; |
| 115 | struct ath_hw *ah = priv->ah; |
| 116 | |
Joe Perches | 226afe6 | 2010-12-02 19:12:37 -0800 | [diff] [blame] | 117 | ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX, "Starting btcoex work\n"); |
Vivek Natarajan | 21cb987 | 2010-08-18 19:57:49 +0530 | [diff] [blame] | 118 | |
| 119 | btcoex->bt_priority_cnt = 0; |
| 120 | btcoex->bt_priority_time = jiffies; |
| 121 | priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN); |
| 122 | ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0); |
| 123 | } |
| 124 | |
| 125 | |
| 126 | /* |
| 127 | * Cancel btcoex and bt duty cycle work. |
| 128 | */ |
| 129 | void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv) |
| 130 | { |
| 131 | cancel_delayed_work_sync(&priv->coex_period_work); |
| 132 | cancel_delayed_work_sync(&priv->duty_cycle_work); |
| 133 | } |