mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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21cb987914
Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
135 lines
4.0 KiB
C
135 lines
4.0 KiB
C
#include "htc.h"
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/******************/
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/* BTCOEX */
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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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if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio))
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btcoex->bt_priority_cnt++;
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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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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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* 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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ath_detect_bt_priority(priv);
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is_btscan = !!(priv->op_flags & OP_BT_SCAN);
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aggr = priv->op_flags & OP_BT_PRIORITY_DETECTED;
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WMI_CMD_BUF(WMI_AGGR_LIMIT_CMD, &aggr);
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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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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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* 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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ath_print(common, ATH_DBG_BTCOEX,
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"time slice work for bt and wlan\n");
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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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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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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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* (Re)start btcoex work
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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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ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
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"Starting btcoex work");
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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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* 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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