335 lines
9.2 KiB
C
335 lines
9.2 KiB
C
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/*
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* Copyright (c) 2010-2011 Atheros Communications Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "htc.h"
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/******************/
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/* BTCOEX */
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/******************/
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#define ATH_HTC_BTCOEX_PRODUCT_ID "wb193"
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#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
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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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clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
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clear_bit(OP_BT_SCAN, &priv->op_flags);
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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_dbg(ath9k_hw_common(ah), BTCOEX,
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"BT scan detected\n");
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set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
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set_bit(OP_BT_SCAN, &priv->op_flags);
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} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
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ath_dbg(ath9k_hw_common(ah), BTCOEX,
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"BT priority traffic detected\n");
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set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
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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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int ret;
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ath_detect_bt_priority(priv);
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ret = ath9k_htc_update_cap_target(priv,
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test_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags));
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if (ret) {
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ath_err(common, "Unable to set BTCOEX parameters\n");
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return;
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}
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ath9k_hw_btcoex_bt_stomp(priv->ah, test_bit(OP_BT_SCAN, &priv->op_flags) ?
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ATH_BTCOEX_STOMP_ALL : btcoex->bt_stomp_type);
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ath9k_hw_btcoex_enable(priv->ah);
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timer_period = test_bit(OP_BT_SCAN, &priv->op_flags) ?
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btcoex->btscan_no_stomp : 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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ath_dbg(common, BTCOEX, "time slice work for bt and wlan\n");
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if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW ||
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test_bit(OP_BT_SCAN, &priv->op_flags))
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ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
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else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
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ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);
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ath9k_hw_btcoex_enable(priv->ah);
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}
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static 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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static 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_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex work\n");
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btcoex->bt_priority_cnt = 0;
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btcoex->bt_priority_time = jiffies;
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clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
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clear_bit(OP_BT_SCAN, &priv->op_flags);
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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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static 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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void ath9k_htc_start_btcoex(struct ath9k_htc_priv *priv)
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{
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struct ath_hw *ah = priv->ah;
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if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) {
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ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
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AR_STOMP_LOW_WLAN_WGHT, 0);
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ath9k_hw_btcoex_enable(ah);
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ath_htc_resume_btcoex_work(priv);
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}
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}
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void ath9k_htc_stop_btcoex(struct ath9k_htc_priv *priv)
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{
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struct ath_hw *ah = priv->ah;
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if (ah->btcoex_hw.enabled &&
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ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
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if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
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ath_htc_cancel_btcoex_work(priv);
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ath9k_hw_btcoex_disable(ah);
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}
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}
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void ath9k_htc_init_btcoex(struct ath9k_htc_priv *priv, char *product)
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{
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struct ath_hw *ah = priv->ah;
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struct ath_common *common = ath9k_hw_common(ah);
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int qnum;
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/*
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* Check if BTCOEX is globally disabled.
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*/
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if (!common->btcoex_enabled) {
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ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_NONE;
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return;
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}
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if (product && strncmp(product, ATH_HTC_BTCOEX_PRODUCT_ID, 5) == 0) {
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ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_3WIRE;
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}
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switch (ath9k_hw_get_btcoex_scheme(priv->ah)) {
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case ATH_BTCOEX_CFG_NONE:
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break;
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case ATH_BTCOEX_CFG_3WIRE:
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priv->ah->btcoex_hw.btactive_gpio = 7;
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priv->ah->btcoex_hw.btpriority_gpio = 6;
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priv->ah->btcoex_hw.wlanactive_gpio = 8;
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priv->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
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ath9k_hw_btcoex_init_3wire(priv->ah);
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ath_htc_init_btcoex_work(priv);
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qnum = priv->hwq_map[IEEE80211_AC_BE];
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ath9k_hw_init_btcoex_hw(priv->ah, qnum);
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break;
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default:
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WARN_ON(1);
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break;
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}
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}
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#endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */
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/*******/
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/* LED */
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/*******/
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#ifdef CONFIG_MAC80211_LEDS
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void ath9k_led_work(struct work_struct *work)
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{
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struct ath9k_htc_priv *priv = container_of(work,
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struct ath9k_htc_priv,
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led_work);
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ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin,
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(priv->brightness == LED_OFF));
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}
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static void ath9k_led_brightness(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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struct ath9k_htc_priv *priv = container_of(led_cdev,
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struct ath9k_htc_priv,
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led_cdev);
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/* Not locked, but it's just a tiny green light..*/
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priv->brightness = brightness;
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ieee80211_queue_work(priv->hw, &priv->led_work);
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}
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void ath9k_deinit_leds(struct ath9k_htc_priv *priv)
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{
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if (!priv->led_registered)
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return;
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ath9k_led_brightness(&priv->led_cdev, LED_OFF);
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led_classdev_unregister(&priv->led_cdev);
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cancel_work_sync(&priv->led_work);
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ath9k_hw_gpio_free(priv->ah, priv->ah->led_pin);
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}
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void ath9k_configure_leds(struct ath9k_htc_priv *priv)
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{
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/* Configure gpio 1 for output */
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ath9k_hw_gpio_request_out(priv->ah, priv->ah->led_pin,
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"ath9k-led",
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AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
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/* LED off, active low */
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ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1);
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}
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void ath9k_init_leds(struct ath9k_htc_priv *priv)
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{
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int ret;
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if (AR_SREV_9287(priv->ah))
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priv->ah->led_pin = ATH_LED_PIN_9287;
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else if (AR_SREV_9271(priv->ah))
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priv->ah->led_pin = ATH_LED_PIN_9271;
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else if (AR_DEVID_7010(priv->ah))
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priv->ah->led_pin = ATH_LED_PIN_7010;
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else
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priv->ah->led_pin = ATH_LED_PIN_DEF;
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if (!ath9k_htc_led_blink)
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priv->led_cdev.default_trigger =
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ieee80211_get_radio_led_name(priv->hw);
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ath9k_configure_leds(priv);
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snprintf(priv->led_name, sizeof(priv->led_name),
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"ath9k_htc-%s", wiphy_name(priv->hw->wiphy));
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priv->led_cdev.name = priv->led_name;
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priv->led_cdev.brightness_set = ath9k_led_brightness;
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ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &priv->led_cdev);
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if (ret < 0)
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return;
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INIT_WORK(&priv->led_work, ath9k_led_work);
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priv->led_registered = true;
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return;
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}
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#endif
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/*******************/
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/* Rfkill */
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/*******************/
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static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv)
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{
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bool is_blocked;
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ath9k_htc_ps_wakeup(priv);
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is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) ==
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priv->ah->rfkill_polarity;
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ath9k_htc_ps_restore(priv);
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return is_blocked;
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}
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void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw)
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{
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struct ath9k_htc_priv *priv = hw->priv;
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bool blocked = !!ath_is_rfkill_set(priv);
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wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
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}
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void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv)
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{
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if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
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wiphy_rfkill_start_polling(priv->hw->wiphy);
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}
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