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@@ -0,0 +1,134 @@
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+#include "htc.h"
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+
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+/******************/
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+/* BTCOEX */
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+/******************/
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+
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+/*
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+ * Detects if there is any priority bt traffic
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+ */
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+static void ath_detect_bt_priority(struct ath9k_htc_priv *priv)
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+{
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+ struct ath_btcoex *btcoex = &priv->btcoex;
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+ struct ath_hw *ah = priv->ah;
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+
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+ if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio))
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+ btcoex->bt_priority_cnt++;
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+
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+ if (time_after(jiffies, btcoex->bt_priority_time +
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+ msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
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+ priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN);
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+ /* Detect if colocated bt started scanning */
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+ if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
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+ ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
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+ "BT scan detected");
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+ priv->op_flags |= (OP_BT_SCAN |
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+ OP_BT_PRIORITY_DETECTED);
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+ } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
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+ ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
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+ "BT priority traffic detected");
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+ priv->op_flags |= OP_BT_PRIORITY_DETECTED;
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+ }
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+
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+ btcoex->bt_priority_cnt = 0;
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+ btcoex->bt_priority_time = jiffies;
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+ }
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+}
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+
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+/*
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+ * This is the master bt coex work which runs for every
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+ * 45ms, bt traffic will be given priority during 55% of this
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+ * period while wlan gets remaining 45%
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+ */
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+static void ath_btcoex_period_work(struct work_struct *work)
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+{
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+ struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
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+ coex_period_work.work);
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+ struct ath_btcoex *btcoex = &priv->btcoex;
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+ struct ath_common *common = ath9k_hw_common(priv->ah);
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+ u32 timer_period;
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+ bool is_btscan;
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+ int ret;
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+ u8 cmd_rsp, aggr;
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+
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+ ath_detect_bt_priority(priv);
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+
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+ is_btscan = !!(priv->op_flags & OP_BT_SCAN);
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+
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+ aggr = priv->op_flags & OP_BT_PRIORITY_DETECTED;
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+
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+ WMI_CMD_BUF(WMI_AGGR_LIMIT_CMD, &aggr);
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+
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+ ath9k_cmn_btcoex_bt_stomp(common, is_btscan ? ATH_BTCOEX_STOMP_ALL :
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+ btcoex->bt_stomp_type);
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+
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+ timer_period = is_btscan ? btcoex->btscan_no_stomp :
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+ btcoex->btcoex_no_stomp;
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+ ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work,
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+ msecs_to_jiffies(timer_period));
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+ ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work,
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+ msecs_to_jiffies(btcoex->btcoex_period));
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+}
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+
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+/*
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+ * Work to time slice between wlan and bt traffic and
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+ * configure weight registers
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+ */
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+static void ath_btcoex_duty_cycle_work(struct work_struct *work)
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+{
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+ struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
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+ duty_cycle_work.work);
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+ struct ath_hw *ah = priv->ah;
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+ struct ath_btcoex *btcoex = &priv->btcoex;
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+ struct ath_common *common = ath9k_hw_common(ah);
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+ bool is_btscan = priv->op_flags & OP_BT_SCAN;
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+
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+ ath_print(common, ATH_DBG_BTCOEX,
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+ "time slice work for bt and wlan\n");
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+
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+ if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan)
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+ ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_NONE);
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+ else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
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+ ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_LOW);
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+}
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+
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+void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv)
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+{
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+ struct ath_btcoex *btcoex = &priv->btcoex;
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+
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+ btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
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+ btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
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+ btcoex->btcoex_period / 100;
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+ btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
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+ btcoex->btcoex_period / 100;
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+ INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work);
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+ INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work);
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+}
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+
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+/*
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+ * (Re)start btcoex work
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+ */
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+
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+void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv)
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+{
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+ struct ath_btcoex *btcoex = &priv->btcoex;
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+ struct ath_hw *ah = priv->ah;
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+
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+ ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
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+ "Starting btcoex work");
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+
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+ btcoex->bt_priority_cnt = 0;
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+ btcoex->bt_priority_time = jiffies;
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+ priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN);
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+ ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0);
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+}
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+
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+
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+/*
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+ * Cancel btcoex and bt duty cycle work.
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+ */
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+void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv)
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+{
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+ cancel_delayed_work_sync(&priv->coex_period_work);
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+ cancel_delayed_work_sync(&priv->duty_cycle_work);
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+}
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Vivek Natarajan