424 lines
11 KiB
C
424 lines
11 KiB
C
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/*
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* Copyright (c) 2008-2011 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 "ath9k.h"
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/********************************/
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/* LED functions */
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/********************************/
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#ifdef CONFIG_MAC80211_LEDS
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static void ath_led_brightness(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev);
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ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, (brightness == LED_OFF));
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}
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void ath_deinit_leds(struct ath_softc *sc)
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{
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if (!sc->led_registered)
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return;
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ath_led_brightness(&sc->led_cdev, LED_OFF);
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led_classdev_unregister(&sc->led_cdev);
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}
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void ath_init_leds(struct ath_softc *sc)
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{
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int ret;
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if (sc->sc_ah->led_pin < 0) {
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if (AR_SREV_9287(sc->sc_ah))
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sc->sc_ah->led_pin = ATH_LED_PIN_9287;
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else if (AR_SREV_9485(sc->sc_ah))
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sc->sc_ah->led_pin = ATH_LED_PIN_9485;
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else if (AR_SREV_9300(sc->sc_ah))
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sc->sc_ah->led_pin = ATH_LED_PIN_9300;
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else if (AR_SREV_9462(sc->sc_ah))
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sc->sc_ah->led_pin = ATH_LED_PIN_9462;
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else
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sc->sc_ah->led_pin = ATH_LED_PIN_DEF;
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}
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/* Configure gpio 1 for output */
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ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin,
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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(sc->sc_ah, sc->sc_ah->led_pin, 1);
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if (!led_blink)
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sc->led_cdev.default_trigger =
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ieee80211_get_radio_led_name(sc->hw);
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snprintf(sc->led_name, sizeof(sc->led_name),
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"ath9k-%s", wiphy_name(sc->hw->wiphy));
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sc->led_cdev.name = sc->led_name;
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sc->led_cdev.brightness_set = ath_led_brightness;
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ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev);
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if (ret < 0)
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return;
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sc->led_registered = true;
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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 ath_softc *sc)
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{
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struct ath_hw *ah = sc->sc_ah;
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bool is_blocked;
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ath9k_ps_wakeup(sc);
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is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
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ah->rfkill_polarity;
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ath9k_ps_restore(sc);
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return is_blocked;
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}
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void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
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{
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struct ath_softc *sc = hw->priv;
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bool blocked = !!ath_is_rfkill_set(sc);
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wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
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}
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void ath_start_rfkill_poll(struct ath_softc *sc)
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{
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struct ath_hw *ah = sc->sc_ah;
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if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
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wiphy_rfkill_start_polling(sc->hw->wiphy);
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}
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#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
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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 ath_softc *sc)
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{
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struct ath_btcoex *btcoex = &sc->btcoex;
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struct ath_hw *ah = sc->sc_ah;
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if (ath9k_hw_gpio_get(sc->sc_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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sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_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_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
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"BT scan detected\n");
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sc->sc_flags |= (SC_OP_BT_SCAN |
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SC_OP_BT_PRIORITY_DETECTED);
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} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
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ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
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"BT priority traffic detected\n");
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sc->sc_flags |= SC_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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static void ath9k_gen_timer_start(struct ath_hw *ah,
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struct ath_gen_timer *timer,
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u32 trig_timeout,
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u32 timer_period)
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{
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ath9k_hw_gen_timer_start(ah, timer, trig_timeout, timer_period);
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if ((ah->imask & ATH9K_INT_GENTIMER) == 0) {
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ath9k_hw_disable_interrupts(ah);
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ah->imask |= ATH9K_INT_GENTIMER;
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ath9k_hw_set_interrupts(ah);
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ath9k_hw_enable_interrupts(ah);
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}
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}
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static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer)
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{
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struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
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ath9k_hw_gen_timer_stop(ah, timer);
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/* if no timer is enabled, turn off interrupt mask */
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if (timer_table->timer_mask.val == 0) {
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ath9k_hw_disable_interrupts(ah);
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ah->imask &= ~ATH9K_INT_GENTIMER;
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ath9k_hw_set_interrupts(ah);
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ath9k_hw_enable_interrupts(ah);
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}
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}
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/*
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* This is the master bt coex timer 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_timer(unsigned long data)
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{
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struct ath_softc *sc = (struct ath_softc *) data;
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struct ath_hw *ah = sc->sc_ah;
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struct ath_btcoex *btcoex = &sc->btcoex;
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u32 timer_period;
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bool is_btscan;
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ath9k_ps_wakeup(sc);
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if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
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ath_detect_bt_priority(sc);
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is_btscan = sc->sc_flags & SC_OP_BT_SCAN;
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spin_lock_bh(&btcoex->btcoex_lock);
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ath9k_hw_btcoex_bt_stomp(ah, is_btscan ? ATH_BTCOEX_STOMP_ALL :
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btcoex->bt_stomp_type);
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ath9k_hw_btcoex_enable(ah);
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spin_unlock_bh(&btcoex->btcoex_lock);
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if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) {
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if (btcoex->hw_timer_enabled)
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ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
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timer_period = is_btscan ? btcoex->btscan_no_stomp :
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btcoex->btcoex_no_stomp;
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ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, timer_period,
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timer_period * 10);
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btcoex->hw_timer_enabled = true;
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}
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ath9k_ps_restore(sc);
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timer_period = btcoex->btcoex_period / 1000;
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mod_timer(&btcoex->period_timer, jiffies +
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msecs_to_jiffies(timer_period));
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}
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/*
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* Generic tsf based hw timer which configures weight
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* registers to time slice between wlan and bt traffic
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*/
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static void ath_btcoex_no_stomp_timer(void *arg)
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{
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struct ath_softc *sc = (struct ath_softc *)arg;
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struct ath_hw *ah = sc->sc_ah;
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struct ath_btcoex *btcoex = &sc->btcoex;
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struct ath_common *common = ath9k_hw_common(ah);
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bool is_btscan = sc->sc_flags & SC_OP_BT_SCAN;
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ath_dbg(common, BTCOEX, "no stomp timer running\n");
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ath9k_ps_wakeup(sc);
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spin_lock_bh(&btcoex->btcoex_lock);
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if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan)
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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(ah);
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spin_unlock_bh(&btcoex->btcoex_lock);
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ath9k_ps_restore(sc);
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}
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static int ath_init_btcoex_timer(struct ath_softc *sc)
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{
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struct ath_btcoex *btcoex = &sc->btcoex;
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btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000;
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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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setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
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(unsigned long) sc);
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spin_lock_init(&btcoex->btcoex_lock);
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btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah,
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ath_btcoex_no_stomp_timer,
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ath_btcoex_no_stomp_timer,
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(void *) sc, AR_FIRST_NDP_TIMER);
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if (!btcoex->no_stomp_timer)
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return -ENOMEM;
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return 0;
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}
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/*
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* (Re)start btcoex timers
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*/
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void ath9k_btcoex_timer_resume(struct ath_softc *sc)
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{
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struct ath_btcoex *btcoex = &sc->btcoex;
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struct ath_hw *ah = sc->sc_ah;
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ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n");
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/* make sure duty cycle timer is also stopped when resuming */
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if (btcoex->hw_timer_enabled)
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ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
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btcoex->bt_priority_cnt = 0;
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btcoex->bt_priority_time = jiffies;
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sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN);
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mod_timer(&btcoex->period_timer, jiffies);
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}
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/*
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* Pause btcoex timer and bt duty cycle timer
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*/
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void ath9k_btcoex_timer_pause(struct ath_softc *sc)
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{
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struct ath_btcoex *btcoex = &sc->btcoex;
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struct ath_hw *ah = sc->sc_ah;
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del_timer_sync(&btcoex->period_timer);
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if (btcoex->hw_timer_enabled)
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ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
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btcoex->hw_timer_enabled = false;
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}
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u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen)
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{
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struct ath_mci_profile *mci = &sc->btcoex.mci;
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u16 aggr_limit = 0;
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if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit)
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aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4;
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else if (sc->sc_flags & SC_OP_BT_PRIORITY_DETECTED)
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aggr_limit = min((max_4ms_framelen * 3) / 8,
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(u32)ATH_AMPDU_LIMIT_MAX);
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return aggr_limit;
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}
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void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status)
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{
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struct ath_hw *ah = sc->sc_ah;
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if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
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if (status & ATH9K_INT_GENTIMER)
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ath_gen_timer_isr(sc->sc_ah);
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if (status & ATH9K_INT_MCI)
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ath_mci_intr(sc);
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}
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void ath9k_start_btcoex(struct ath_softc *sc)
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|
|
{
|
||
|
|
struct ath_hw *ah = sc->sc_ah;
|
||
|
|
|
||
|
|
if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) &&
|
||
|
|
!ah->btcoex_hw.enabled) {
|
||
|
|
if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
|
||
|
|
ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
|
||
|
|
AR_STOMP_LOW_WLAN_WGHT);
|
||
|
|
ath9k_hw_btcoex_enable(ah);
|
||
|
|
|
||
|
|
if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
|
||
|
|
ath9k_btcoex_timer_resume(sc);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void ath9k_stop_btcoex(struct ath_softc *sc)
|
||
|
|
{
|
||
|
|
struct ath_hw *ah = sc->sc_ah;
|
||
|
|
|
||
|
|
if (ah->btcoex_hw.enabled &&
|
||
|
|
ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
|
||
|
|
ath9k_hw_btcoex_disable(ah);
|
||
|
|
if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
|
||
|
|
ath9k_btcoex_timer_pause(sc);
|
||
|
|
if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_MCI)
|
||
|
|
ath_mci_flush_profile(&sc->btcoex.mci);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void ath9k_deinit_btcoex(struct ath_softc *sc)
|
||
|
|
{
|
||
|
|
if ((sc->btcoex.no_stomp_timer) &&
|
||
|
|
ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_3WIRE)
|
||
|
|
ath_gen_timer_free(sc->sc_ah, sc->btcoex.no_stomp_timer);
|
||
|
|
|
||
|
|
if (ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_MCI)
|
||
|
|
ath_mci_cleanup(sc);
|
||
|
|
}
|
||
|
|
|
||
|
|
int ath9k_init_btcoex(struct ath_softc *sc)
|
||
|
|
{
|
||
|
|
struct ath_txq *txq;
|
||
|
|
struct ath_hw *ah = sc->sc_ah;
|
||
|
|
int r;
|
||
|
|
|
||
|
|
ath9k_hw_btcoex_init_scheme(ah);
|
||
|
|
|
||
|
|
switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) {
|
||
|
|
case ATH_BTCOEX_CFG_NONE:
|
||
|
|
break;
|
||
|
|
case ATH_BTCOEX_CFG_2WIRE:
|
||
|
|
ath9k_hw_btcoex_init_2wire(sc->sc_ah);
|
||
|
|
break;
|
||
|
|
case ATH_BTCOEX_CFG_3WIRE:
|
||
|
|
ath9k_hw_btcoex_init_3wire(sc->sc_ah);
|
||
|
|
r = ath_init_btcoex_timer(sc);
|
||
|
|
if (r)
|
||
|
|
return -1;
|
||
|
|
txq = sc->tx.txq_map[WME_AC_BE];
|
||
|
|
ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum);
|
||
|
|
sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
|
||
|
|
break;
|
||
|
|
case ATH_BTCOEX_CFG_MCI:
|
||
|
|
sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
|
||
|
|
sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
|
||
|
|
INIT_LIST_HEAD(&sc->btcoex.mci.info);
|
||
|
|
|
||
|
|
r = ath_mci_setup(sc);
|
||
|
|
if (r)
|
||
|
|
return r;
|
||
|
|
|
||
|
|
ath9k_hw_btcoex_init_mci(ah);
|
||
|
|
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
WARN_ON(1);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */
|