ath9k_htc: Move LED/RFKILL code to htc_drv_gpio.c

And add the copyright/license header.

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 327 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
index 283ff97ed44..fe70f67aa08 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c
@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) 2010 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 "htc.h"
 
 /******************/
@@ -131,3 +147,314 @@ 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);
 }
+
+/*******/
+/* LED */
+/*******/
+
+static void ath9k_led_blink_work(struct work_struct *work)
+{
+        struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
+                                                   ath9k_led_blink_work.work);
+
+        if (!(priv->op_flags & OP_LED_ASSOCIATED))
+                return;
+
+        if ((priv->led_on_duration == ATH_LED_ON_DURATION_IDLE) ||
+            (priv->led_off_duration == ATH_LED_OFF_DURATION_IDLE))
+                ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 0);
+        else
+                ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin,
+                                  (priv->op_flags & OP_LED_ON) ? 1 : 0);
+
+        ieee80211_queue_delayed_work(priv->hw,
+                                     &priv->ath9k_led_blink_work,
+                                     (priv->op_flags & OP_LED_ON) ?
+                                     msecs_to_jiffies(priv->led_off_duration) :
+                                     msecs_to_jiffies(priv->led_on_duration));
+
+        priv->led_on_duration = priv->led_on_cnt ?
+                max((ATH_LED_ON_DURATION_IDLE - priv->led_on_cnt), 25) :
+                ATH_LED_ON_DURATION_IDLE;
+        priv->led_off_duration = priv->led_off_cnt ?
+                max((ATH_LED_OFF_DURATION_IDLE - priv->led_off_cnt), 10) :
+                ATH_LED_OFF_DURATION_IDLE;
+        priv->led_on_cnt = priv->led_off_cnt = 0;
+
+        if (priv->op_flags & OP_LED_ON)
+                priv->op_flags &= ~OP_LED_ON;
+        else
+                priv->op_flags |= OP_LED_ON;
+}
+
+static void ath9k_led_brightness_work(struct work_struct *work)
+{
+        struct ath_led *led = container_of(work, struct ath_led,
+                                           brightness_work.work);
+        struct ath9k_htc_priv *priv = led->priv;
+
+        switch (led->brightness) {
+        case LED_OFF:
+                if (led->led_type == ATH_LED_ASSOC ||
+                    led->led_type == ATH_LED_RADIO) {
+                        ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin,
+                                          (led->led_type == ATH_LED_RADIO));
+                        priv->op_flags &= ~OP_LED_ASSOCIATED;
+                        if (led->led_type == ATH_LED_RADIO)
+                                priv->op_flags &= ~OP_LED_ON;
+                } else {
+                        priv->led_off_cnt++;
+                }
+                break;
+        case LED_FULL:
+                if (led->led_type == ATH_LED_ASSOC) {
+                        priv->op_flags |= OP_LED_ASSOCIATED;
+                        ieee80211_queue_delayed_work(priv->hw,
+                                             &priv->ath9k_led_blink_work, 0);
+                } else if (led->led_type == ATH_LED_RADIO) {
+                        ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 0);
+                        priv->op_flags |= OP_LED_ON;
+                } else {
+                        priv->led_on_cnt++;
+                }
+                break;
+        default:
+                break;
+        }
+}
+
+static void ath9k_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 ath9k_htc_priv *priv = led->priv;
+
+        led->brightness = brightness;
+        if (!(priv->op_flags & OP_LED_DEINIT))
+                ieee80211_queue_delayed_work(priv->hw,
+                                             &led->brightness_work, 0);
+}
+
+void ath9k_led_stop_brightness(struct ath9k_htc_priv *priv)
+{
+        cancel_delayed_work_sync(&priv->radio_led.brightness_work);
+        cancel_delayed_work_sync(&priv->assoc_led.brightness_work);
+        cancel_delayed_work_sync(&priv->tx_led.brightness_work);
+        cancel_delayed_work_sync(&priv->rx_led.brightness_work);
+}
+
+static int ath9k_register_led(struct ath9k_htc_priv *priv, struct ath_led *led,
+                              char *trigger)
+{
+        int ret;
+
+        led->priv = priv;
+        led->led_cdev.name = led->name;
+        led->led_cdev.default_trigger = trigger;
+        led->led_cdev.brightness_set = ath9k_led_brightness;
+
+        ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &led->led_cdev);
+        if (ret)
+                ath_err(ath9k_hw_common(priv->ah),
+                        "Failed to register led:%s", led->name);
+        else
+                led->registered = 1;
+
+        INIT_DELAYED_WORK(&led->brightness_work, ath9k_led_brightness_work);
+
+        return ret;
+}
+
+static void ath9k_unregister_led(struct ath_led *led)
+{
+        if (led->registered) {
+                led_classdev_unregister(&led->led_cdev);
+                led->registered = 0;
+        }
+}
+
+void ath9k_deinit_leds(struct ath9k_htc_priv *priv)
+{
+        priv->op_flags |= OP_LED_DEINIT;
+        ath9k_unregister_led(&priv->assoc_led);
+        priv->op_flags &= ~OP_LED_ASSOCIATED;
+        ath9k_unregister_led(&priv->tx_led);
+        ath9k_unregister_led(&priv->rx_led);
+        ath9k_unregister_led(&priv->radio_led);
+}
+
+void ath9k_init_leds(struct ath9k_htc_priv *priv)
+{
+        char *trigger;
+        int ret;
+
+        if (AR_SREV_9287(priv->ah))
+                priv->ah->led_pin = ATH_LED_PIN_9287;
+        else if (AR_SREV_9271(priv->ah))
+                priv->ah->led_pin = ATH_LED_PIN_9271;
+        else if (AR_DEVID_7010(priv->ah))
+                priv->ah->led_pin = ATH_LED_PIN_7010;
+        else
+                priv->ah->led_pin = ATH_LED_PIN_DEF;
+
+        /* Configure gpio 1 for output */
+        ath9k_hw_cfg_output(priv->ah, priv->ah->led_pin,
+                            AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+        /* LED off, active low */
+        ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1);
+
+        INIT_DELAYED_WORK(&priv->ath9k_led_blink_work, ath9k_led_blink_work);
+
+        trigger = ieee80211_get_radio_led_name(priv->hw);
+        snprintf(priv->radio_led.name, sizeof(priv->radio_led.name),
+                "ath9k-%s::radio", wiphy_name(priv->hw->wiphy));
+        ret = ath9k_register_led(priv, &priv->radio_led, trigger);
+        priv->radio_led.led_type = ATH_LED_RADIO;
+        if (ret)
+                goto fail;
+
+        trigger = ieee80211_get_assoc_led_name(priv->hw);
+        snprintf(priv->assoc_led.name, sizeof(priv->assoc_led.name),
+                "ath9k-%s::assoc", wiphy_name(priv->hw->wiphy));
+        ret = ath9k_register_led(priv, &priv->assoc_led, trigger);
+        priv->assoc_led.led_type = ATH_LED_ASSOC;
+        if (ret)
+                goto fail;
+
+        trigger = ieee80211_get_tx_led_name(priv->hw);
+        snprintf(priv->tx_led.name, sizeof(priv->tx_led.name),
+                "ath9k-%s::tx", wiphy_name(priv->hw->wiphy));
+        ret = ath9k_register_led(priv, &priv->tx_led, trigger);
+        priv->tx_led.led_type = ATH_LED_TX;
+        if (ret)
+                goto fail;
+
+        trigger = ieee80211_get_rx_led_name(priv->hw);
+        snprintf(priv->rx_led.name, sizeof(priv->rx_led.name),
+                "ath9k-%s::rx", wiphy_name(priv->hw->wiphy));
+        ret = ath9k_register_led(priv, &priv->rx_led, trigger);
+        priv->rx_led.led_type = ATH_LED_RX;
+        if (ret)
+                goto fail;
+
+        priv->op_flags &= ~OP_LED_DEINIT;
+
+        return;
+
+fail:
+        cancel_delayed_work_sync(&priv->ath9k_led_blink_work);
+        ath9k_deinit_leds(priv);
+}
+
+/*******************/
+/*      Rfkill     */
+/*******************/
+
+static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv)
+{
+        return ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) ==
+                priv->ah->rfkill_polarity;
+}
+
+void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw)
+{
+        struct ath9k_htc_priv *priv = hw->priv;
+        bool blocked = !!ath_is_rfkill_set(priv);
+
+        wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
+}
+
+void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv)
+{
+        if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
+                wiphy_rfkill_start_polling(priv->hw->wiphy);
+}
+
+void ath9k_htc_radio_enable(struct ieee80211_hw *hw)
+{
+        struct ath9k_htc_priv *priv = hw->priv;
+        struct ath_hw *ah = priv->ah;
+        struct ath_common *common = ath9k_hw_common(ah);
+        int ret;
+        u8 cmd_rsp;
+
+        if (!ah->curchan)
+                ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
+
+        /* Reset the HW */
+        ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
+        if (ret) {
+                ath_err(common,
+                        "Unable to reset hardware; reset status %d (freq %u MHz)\n",
+                        ret, ah->curchan->channel);
+        }
+
+        ath_update_txpow(priv);
+
+        /* Start RX */
+        WMI_CMD(WMI_START_RECV_CMDID);
+        ath9k_host_rx_init(priv);
+
+        /* Start TX */
+        htc_start(priv->htc);
+        spin_lock_bh(&priv->tx_lock);
+        priv->tx_queues_stop = false;
+        spin_unlock_bh(&priv->tx_lock);
+        ieee80211_wake_queues(hw);
+
+        WMI_CMD(WMI_ENABLE_INTR_CMDID);
+
+        /* Enable LED */
+        ath9k_hw_cfg_output(ah, ah->led_pin,
+                            AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+        ath9k_hw_set_gpio(ah, ah->led_pin, 0);
+}
+
+void ath9k_htc_radio_disable(struct ieee80211_hw *hw)
+{
+        struct ath9k_htc_priv *priv = hw->priv;
+        struct ath_hw *ah = priv->ah;
+        struct ath_common *common = ath9k_hw_common(ah);
+        int ret;
+        u8 cmd_rsp;
+
+        ath9k_htc_ps_wakeup(priv);
+
+        /* Disable LED */
+        ath9k_hw_set_gpio(ah, ah->led_pin, 1);
+        ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
+
+        WMI_CMD(WMI_DISABLE_INTR_CMDID);
+
+        /* Stop TX */
+        ieee80211_stop_queues(hw);
+        htc_stop(priv->htc);
+        WMI_CMD(WMI_DRAIN_TXQ_ALL_CMDID);
+        skb_queue_purge(&priv->tx_queue);
+
+        /* Stop RX */
+        WMI_CMD(WMI_STOP_RECV_CMDID);
+
+        /*
+         * The MIB counters have to be disabled here,
+         * since the target doesn't do it.
+         */
+        ath9k_hw_disable_mib_counters(ah);
+
+        if (!ah->curchan)
+                ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
+
+        /* Reset the HW */
+        ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
+        if (ret) {
+                ath_err(common,
+                        "Unable to reset hardware; reset status %d (freq %u MHz)\n",
+                        ret, ah->curchan->channel);
+        }
+
+        /* Disable the PHY */
+        ath9k_hw_phy_disable(ah);
+
+        ath9k_htc_ps_restore(priv);
+        ath9k_htc_setpower(priv, ATH9K_PM_FULL_SLEEP);
+}