diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/htc_drv_gpio.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/htc_drv_gpio.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c b/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c new file mode 100644 index 00000000000..50eec9a3b88 --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c @@ -0,0 +1,134 @@ +#include "htc.h" + +/******************/ +/* BTCOEX */ +/******************/ + +/* + * Detects if there is any priority bt traffic + */ +static void ath_detect_bt_priority(struct ath9k_htc_priv *priv) +{ + struct ath_btcoex *btcoex = &priv->btcoex; + struct ath_hw *ah = priv->ah; + + if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio)) + btcoex->bt_priority_cnt++; + + if (time_after(jiffies, btcoex->bt_priority_time + + msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) { + priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN); + /* Detect if colocated bt started scanning */ + if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { + ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX, + "BT scan detected"); + priv->op_flags |= (OP_BT_SCAN | + OP_BT_PRIORITY_DETECTED); + } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { + ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX, + "BT priority traffic detected"); + priv->op_flags |= OP_BT_PRIORITY_DETECTED; + } + + btcoex->bt_priority_cnt = 0; + btcoex->bt_priority_time = jiffies; + } +} + +/* + * This is the master bt coex work which runs for every + * 45ms, bt traffic will be given priority during 55% of this + * period while wlan gets remaining 45% + */ +static void ath_btcoex_period_work(struct work_struct *work) +{ + struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, + coex_period_work.work); + struct ath_btcoex *btcoex = &priv->btcoex; + struct ath_common *common = ath9k_hw_common(priv->ah); + u32 timer_period; + bool is_btscan; + int ret; + u8 cmd_rsp, aggr; + + ath_detect_bt_priority(priv); + + is_btscan = !!(priv->op_flags & OP_BT_SCAN); + + aggr = priv->op_flags & OP_BT_PRIORITY_DETECTED; + + WMI_CMD_BUF(WMI_AGGR_LIMIT_CMD, &aggr); + + ath9k_cmn_btcoex_bt_stomp(common, is_btscan ? ATH_BTCOEX_STOMP_ALL : + btcoex->bt_stomp_type); + + timer_period = is_btscan ? btcoex->btscan_no_stomp : + btcoex->btcoex_no_stomp; + ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work, + msecs_to_jiffies(timer_period)); + ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, + msecs_to_jiffies(btcoex->btcoex_period)); +} + +/* + * Work to time slice between wlan and bt traffic and + * configure weight registers + */ +static void ath_btcoex_duty_cycle_work(struct work_struct *work) +{ + struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, + duty_cycle_work.work); + struct ath_hw *ah = priv->ah; + struct ath_btcoex *btcoex = &priv->btcoex; + struct ath_common *common = ath9k_hw_common(ah); + bool is_btscan = priv->op_flags & OP_BT_SCAN; + + ath_print(common, ATH_DBG_BTCOEX, + "time slice work for bt and wlan\n"); + + if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan) + ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_NONE); + else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) + ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_LOW); +} + +void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv) +{ + struct ath_btcoex *btcoex = &priv->btcoex; + + btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD; + btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * + btcoex->btcoex_period / 100; + btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * + btcoex->btcoex_period / 100; + INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work); + INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work); +} + +/* + * (Re)start btcoex work + */ + +void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv) +{ + struct ath_btcoex *btcoex = &priv->btcoex; + struct ath_hw *ah = priv->ah; + + ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX, + "Starting btcoex work"); + + btcoex->bt_priority_cnt = 0; + btcoex->bt_priority_time = jiffies; + priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN); + ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0); +} + + +/* + * Cancel btcoex and bt duty cycle work. + */ +void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv) +{ + cancel_delayed_work_sync(&priv->coex_period_work); + cancel_delayed_work_sync(&priv->duty_cycle_work); +} |