1 files changed, 428 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/gpio.c b/drivers/net/wireless/ath/ath9k/gpio.c
new file mode 100644
index 000000000000..e204bd25ff65
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/gpio.c
@@ -0,0 +1,428 @@
+/*
+ * Copyright (c) 2008-2009 Atheros Communications Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "ath9k.h"
+
+/********************************/
+/*       LED functions          */
+/********************************/
+
+static void ath_led_blink_work(struct work_struct *work)
+{
+        struct ath_softc *sc = container_of(work, struct ath_softc,
+                                            ath_led_blink_work.work);
+
+        if (!(sc->sc_flags & SC_OP_LED_ASSOCIATED))
+                return;
+
+        if ((sc->led_on_duration == ATH_LED_ON_DURATION_IDLE) ||
+            (sc->led_off_duration == ATH_LED_OFF_DURATION_IDLE))
+                ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 0);
+        else
+                ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin,
+                                  (sc->sc_flags & SC_OP_LED_ON) ? 1 : 0);
+
+        ieee80211_queue_delayed_work(sc->hw,
+                                     &sc->ath_led_blink_work,
+                                     (sc->sc_flags & SC_OP_LED_ON) ?
+                                        msecs_to_jiffies(sc->led_off_duration) :
+                                        msecs_to_jiffies(sc->led_on_duration));
+
+        sc->led_on_duration = sc->led_on_cnt ?
+                        max((ATH_LED_ON_DURATION_IDLE - sc->led_on_cnt), 25) :
+                        ATH_LED_ON_DURATION_IDLE;
+        sc->led_off_duration = sc->led_off_cnt ?
+                        max((ATH_LED_OFF_DURATION_IDLE - sc->led_off_cnt), 10) :
+                        ATH_LED_OFF_DURATION_IDLE;
+        sc->led_on_cnt = sc->led_off_cnt = 0;
+        if (sc->sc_flags & SC_OP_LED_ON)
+                sc->sc_flags &= ~SC_OP_LED_ON;
+        else
+                sc->sc_flags |= SC_OP_LED_ON;
+}
+
+static void ath_led_brightness(struct led_classdev *led_cdev,
+                               enum led_brightness brightness)
+{
+        struct ath_led *led = container_of(led_cdev, struct ath_led, led_cdev);
+        struct ath_softc *sc = led->sc;
+
+        switch (brightness) {
+        case LED_OFF:
+                if (led->led_type == ATH_LED_ASSOC ||
+                    led->led_type == ATH_LED_RADIO) {
+                        ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin,
+                                (led->led_type == ATH_LED_RADIO));
+                        sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
+                        if (led->led_type == ATH_LED_RADIO)
+                                sc->sc_flags &= ~SC_OP_LED_ON;
+                } else {
+                        sc->led_off_cnt++;
+                }
+                break;
+        case LED_FULL:
+                if (led->led_type == ATH_LED_ASSOC) {
+                        sc->sc_flags |= SC_OP_LED_ASSOCIATED;
+                        ieee80211_queue_delayed_work(sc->hw,
+                                                     &sc->ath_led_blink_work, 0);
+                } else if (led->led_type == ATH_LED_RADIO) {
+                        ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 0);
+                        sc->sc_flags |= SC_OP_LED_ON;
+                } else {
+                        sc->led_on_cnt++;
+                }
+                break;
+        default:
+                break;
+        }
+}
+
+static int ath_register_led(struct ath_softc *sc, struct ath_led *led,
+                            char *trigger)
+{
+        int ret;
+
+        led->sc = sc;
+        led->led_cdev.name = led->name;
+        led->led_cdev.default_trigger = trigger;
+        led->led_cdev.brightness_set = ath_led_brightness;
+
+        ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->led_cdev);
+        if (ret)
+                ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
+                          "Failed to register led:%s", led->name);
+        else
+                led->registered = 1;
+        return ret;
+}
+
+static void ath_unregister_led(struct ath_led *led)
+{
+        if (led->registered) {
+                led_classdev_unregister(&led->led_cdev);
+                led->registered = 0;
+        }
+}
+
+void ath_deinit_leds(struct ath_softc *sc)
+{
+        ath_unregister_led(&sc->assoc_led);
+        sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
+        ath_unregister_led(&sc->tx_led);
+        ath_unregister_led(&sc->rx_led);
+        ath_unregister_led(&sc->radio_led);
+        ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
+}
+
+void ath_init_leds(struct ath_softc *sc)
+{
+        char *trigger;
+        int ret;
+
+        if (AR_SREV_9287(sc->sc_ah))
+                sc->sc_ah->led_pin = ATH_LED_PIN_9287;
+        else
+                sc->sc_ah->led_pin = ATH_LED_PIN_DEF;
+
+        /* Configure gpio 1 for output */
+        ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin,
+                            AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+        /* LED off, active low */
+        ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
+
+        INIT_DELAYED_WORK(&sc->ath_led_blink_work, ath_led_blink_work);
+
+        trigger = ieee80211_get_radio_led_name(sc->hw);
+        snprintf(sc->radio_led.name, sizeof(sc->radio_led.name),
+                "ath9k-%s::radio", wiphy_name(sc->hw->wiphy));
+        ret = ath_register_led(sc, &sc->radio_led, trigger);
+        sc->radio_led.led_type = ATH_LED_RADIO;
+        if (ret)
+                goto fail;
+
+        trigger = ieee80211_get_assoc_led_name(sc->hw);
+        snprintf(sc->assoc_led.name, sizeof(sc->assoc_led.name),
+                "ath9k-%s::assoc", wiphy_name(sc->hw->wiphy));
+        ret = ath_register_led(sc, &sc->assoc_led, trigger);
+        sc->assoc_led.led_type = ATH_LED_ASSOC;
+        if (ret)
+                goto fail;
+
+        trigger = ieee80211_get_tx_led_name(sc->hw);
+        snprintf(sc->tx_led.name, sizeof(sc->tx_led.name),
+                "ath9k-%s::tx", wiphy_name(sc->hw->wiphy));
+        ret = ath_register_led(sc, &sc->tx_led, trigger);
+        sc->tx_led.led_type = ATH_LED_TX;
+        if (ret)
+                goto fail;
+
+        trigger = ieee80211_get_rx_led_name(sc->hw);
+        snprintf(sc->rx_led.name, sizeof(sc->rx_led.name),
+                "ath9k-%s::rx", wiphy_name(sc->hw->wiphy));
+        ret = ath_register_led(sc, &sc->rx_led, trigger);
+        sc->rx_led.led_type = ATH_LED_RX;
+        if (ret)
+                goto fail;
+
+        return;
+
+fail:
+        cancel_delayed_work_sync(&sc->ath_led_blink_work);
+        ath_deinit_leds(sc);
+}
+
+/*******************/
+/*      Rfkill     */
+/*******************/
+
+static bool ath_is_rfkill_set(struct ath_softc *sc)
+{
+        struct ath_hw *ah = sc->sc_ah;
+
+        return ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
+                                  ah->rfkill_polarity;
+}
+
+void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
+{
+        struct ath_wiphy *aphy = hw->priv;
+        struct ath_softc *sc = aphy->sc;
+        bool blocked = !!ath_is_rfkill_set(sc);
+
+        wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
+}
+
+void ath_start_rfkill_poll(struct ath_softc *sc)
+{
+        struct ath_hw *ah = sc->sc_ah;
+
+        if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
+                wiphy_rfkill_start_polling(sc->hw->wiphy);
+}
+
+/******************/
+/*     BTCOEX     */
+/******************/
+
+/*
+ * Detects if there is any priority bt traffic
+ */
+static void ath_detect_bt_priority(struct ath_softc *sc)
+{
+        struct ath_btcoex *btcoex = &sc->btcoex;
+        struct ath_hw *ah = sc->sc_ah;
+
+        if (ath9k_hw_gpio_get(sc->sc_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))) {
+                if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
+                        ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX,
+                                  "BT priority traffic detected");
+                        sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED;
+                } else {
+                        sc->sc_flags &= ~SC_OP_BT_PRIORITY_DETECTED;
+                }
+
+                btcoex->bt_priority_cnt = 0;
+                btcoex->bt_priority_time = jiffies;
+        }
+}
+
+/*
+ * Configures appropriate weight based on stomp type.
+ */
+static void ath9k_btcoex_bt_stomp(struct ath_softc *sc,
+                                  enum ath_stomp_type stomp_type)
+{
+        struct ath_hw *ah = sc->sc_ah;
+
+        switch (stomp_type) {
+        case ATH_BTCOEX_STOMP_ALL:
+                ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
+                                           AR_STOMP_ALL_WLAN_WGHT);
+                break;
+        case ATH_BTCOEX_STOMP_LOW:
+                ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
+                                           AR_STOMP_LOW_WLAN_WGHT);
+                break;
+        case ATH_BTCOEX_STOMP_NONE:
+                ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
+                                           AR_STOMP_NONE_WLAN_WGHT);
+                break;
+        default:
+                ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
+                          "Invalid Stomptype\n");
+                break;
+        }
+
+        ath9k_hw_btcoex_enable(ah);
+}
+
+static void ath9k_gen_timer_start(struct ath_hw *ah,
+                                  struct ath_gen_timer *timer,
+                                  u32 timer_next,
+                                  u32 timer_period)
+{
+        struct ath_common *common = ath9k_hw_common(ah);
+        struct ath_softc *sc = (struct ath_softc *) common->priv;
+
+        ath9k_hw_gen_timer_start(ah, timer, timer_next, timer_period);
+
+        if ((sc->imask & ATH9K_INT_GENTIMER) == 0) {
+                ath9k_hw_set_interrupts(ah, 0);
+                sc->imask |= ATH9K_INT_GENTIMER;
+                ath9k_hw_set_interrupts(ah, sc->imask);
+        }
+}
+
+static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer)
+{
+        struct ath_common *common = ath9k_hw_common(ah);
+        struct ath_softc *sc = (struct ath_softc *) common->priv;
+        struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
+
+        ath9k_hw_gen_timer_stop(ah, timer);
+
+        /* if no timer is enabled, turn off interrupt mask */
+        if (timer_table->timer_mask.val == 0) {
+                ath9k_hw_set_interrupts(ah, 0);
+                sc->imask &= ~ATH9K_INT_GENTIMER;
+                ath9k_hw_set_interrupts(ah, sc->imask);
+        }
+}
+
+/*
+ * This is the master bt coex timer 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_timer(unsigned long data)
+{
+        struct ath_softc *sc = (struct ath_softc *) data;
+        struct ath_hw *ah = sc->sc_ah;
+        struct ath_btcoex *btcoex = &sc->btcoex;
+
+        ath_detect_bt_priority(sc);
+
+        spin_lock_bh(&btcoex->btcoex_lock);
+
+        ath9k_btcoex_bt_stomp(sc, btcoex->bt_stomp_type);
+
+        spin_unlock_bh(&btcoex->btcoex_lock);
+
+        if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) {
+                if (btcoex->hw_timer_enabled)
+                        ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
+
+                ath9k_gen_timer_start(ah,
+                                      btcoex->no_stomp_timer,
+                                      (ath9k_hw_gettsf32(ah) +
+                                       btcoex->btcoex_no_stomp),
+                                       btcoex->btcoex_no_stomp * 10);
+                btcoex->hw_timer_enabled = true;
+        }
+
+        mod_timer(&btcoex->period_timer, jiffies +
+                                  msecs_to_jiffies(ATH_BTCOEX_DEF_BT_PERIOD));
+}
+
+/*
+ * Generic tsf based hw timer which configures weight
+ * registers to time slice between wlan and bt traffic
+ */
+static void ath_btcoex_no_stomp_timer(void *arg)
+{
+        struct ath_softc *sc = (struct ath_softc *)arg;
+        struct ath_hw *ah = sc->sc_ah;
+        struct ath_btcoex *btcoex = &sc->btcoex;
+
+        ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
+                  "no stomp timer running \n");
+
+        spin_lock_bh(&btcoex->btcoex_lock);
+
+        if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW)
+                ath9k_btcoex_bt_stomp(sc, ATH_BTCOEX_STOMP_NONE);
+         else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
+                ath9k_btcoex_bt_stomp(sc, ATH_BTCOEX_STOMP_LOW);
+
+        spin_unlock_bh(&btcoex->btcoex_lock);
+}
+
+int ath_init_btcoex_timer(struct ath_softc *sc)
+{
+        struct ath_btcoex *btcoex = &sc->btcoex;
+
+        btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000;
+        btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
+                btcoex->btcoex_period / 100;
+
+        setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
+                        (unsigned long) sc);
+
+        spin_lock_init(&btcoex->btcoex_lock);
+
+        btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah,
+                        ath_btcoex_no_stomp_timer,
+                        ath_btcoex_no_stomp_timer,
+                        (void *) sc, AR_FIRST_NDP_TIMER);
+
+        if (!btcoex->no_stomp_timer)
+                return -ENOMEM;
+
+        return 0;
+}
+
+/*
+ * (Re)start btcoex timers
+ */
+void ath9k_btcoex_timer_resume(struct ath_softc *sc)
+{
+        struct ath_btcoex *btcoex = &sc->btcoex;
+        struct ath_hw *ah = sc->sc_ah;
+
+        ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
+                  "Starting btcoex timers");
+
+        /* make sure duty cycle timer is also stopped when resuming */
+        if (btcoex->hw_timer_enabled)
+                ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
+
+        btcoex->bt_priority_cnt = 0;
+        btcoex->bt_priority_time = jiffies;
+        sc->sc_flags &= ~SC_OP_BT_PRIORITY_DETECTED;
+
+        mod_timer(&btcoex->period_timer, jiffies);
+}
+
+
+/*
+ * Pause btcoex timer and bt duty cycle timer
+ */
+void ath9k_btcoex_timer_pause(struct ath_softc *sc)
+{
+        struct ath_btcoex *btcoex = &sc->btcoex;
+        struct ath_hw *ah = sc->sc_ah;
+
+        del_timer_sync(&btcoex->period_timer);
+
+        if (btcoex->hw_timer_enabled)
+                ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
+
+        btcoex->hw_timer_enabled = false;
+}