1 files changed, 334 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
new file mode 100644
index 000000000..ecb848b60
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c
@@ -0,0 +1,334 @@
+/*
+ * Copyright (c) 2010-2011 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"
+
+/******************/
+/*     BTCOEX     */
+/******************/
+
+#define ATH_HTC_BTCOEX_PRODUCT_ID "wb193"
+
+#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
+
+/*
+ * Detects if there is any priority bt traffic
+ */
+static void ath_detect_bt_priority(struct ath9k_htc_priv *priv)
+{
+	struct ath_btcoex *btcoex = &priv->btcoex;
+	struct ath_hw *ah = priv->ah;
+
+	if (ath9k_hw_gpio_get(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))) {
+		clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
+		clear_bit(OP_BT_SCAN, &priv->op_flags);
+		/* Detect if colocated bt started scanning */
+		if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
+			ath_dbg(ath9k_hw_common(ah), BTCOEX,
+				"BT scan detected\n");
+			set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
+			set_bit(OP_BT_SCAN, &priv->op_flags);
+		} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
+			ath_dbg(ath9k_hw_common(ah), BTCOEX,
+				"BT priority traffic detected\n");
+			set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
+		}
+
+		btcoex->bt_priority_cnt = 0;
+		btcoex->bt_priority_time = jiffies;
+	}
+}
+
+/*
+ * This is the master bt coex work 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_work(struct work_struct *work)
+{
+	struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
+						   coex_period_work.work);
+	struct ath_btcoex *btcoex = &priv->btcoex;
+	struct ath_common *common = ath9k_hw_common(priv->ah);
+	u32 timer_period;
+	int ret;
+
+	ath_detect_bt_priority(priv);
+
+	ret = ath9k_htc_update_cap_target(priv,
+			  test_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags));
+	if (ret) {
+		ath_err(common, "Unable to set BTCOEX parameters\n");
+		return;
+	}
+
+	ath9k_hw_btcoex_bt_stomp(priv->ah, test_bit(OP_BT_SCAN, &priv->op_flags) ?
+				 ATH_BTCOEX_STOMP_ALL : btcoex->bt_stomp_type);
+
+	ath9k_hw_btcoex_enable(priv->ah);
+	timer_period = test_bit(OP_BT_SCAN, &priv->op_flags) ?
+		btcoex->btscan_no_stomp : btcoex->btcoex_no_stomp;
+	ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work,
+				     msecs_to_jiffies(timer_period));
+	ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work,
+				     msecs_to_jiffies(btcoex->btcoex_period));
+}
+
+/*
+ * Work to time slice between wlan and bt traffic and
+ * configure weight registers
+ */
+static void ath_btcoex_duty_cycle_work(struct work_struct *work)
+{
+	struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
+						   duty_cycle_work.work);
+	struct ath_hw *ah = priv->ah;
+	struct ath_btcoex *btcoex = &priv->btcoex;
+	struct ath_common *common = ath9k_hw_common(ah);
+
+	ath_dbg(common, BTCOEX, "time slice work for bt and wlan\n");
+
+	if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW ||
+	    test_bit(OP_BT_SCAN, &priv->op_flags))
+		ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
+	else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
+		ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);
+
+	ath9k_hw_btcoex_enable(priv->ah);
+}
+
+static void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv)
+{
+	struct ath_btcoex *btcoex = &priv->btcoex;
+
+	btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
+	btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
+		btcoex->btcoex_period / 100;
+	btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
+				   btcoex->btcoex_period / 100;
+	INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work);
+	INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work);
+}
+
+/*
+ * (Re)start btcoex work
+ */
+
+static void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv)
+{
+	struct ath_btcoex *btcoex = &priv->btcoex;
+	struct ath_hw *ah = priv->ah;
+
+	ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex work\n");
+
+	btcoex->bt_priority_cnt = 0;
+	btcoex->bt_priority_time = jiffies;
+	clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
+	clear_bit(OP_BT_SCAN, &priv->op_flags);
+	ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0);
+}
+
+
+/*
+ * Cancel btcoex and bt duty cycle work.
+ */
+static 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);
+}
+
+void ath9k_htc_start_btcoex(struct ath9k_htc_priv *priv)
+{
+	struct ath_hw *ah = priv->ah;
+
+	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) {
+		ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
+					   AR_STOMP_LOW_WLAN_WGHT, 0);
+		ath9k_hw_btcoex_enable(ah);
+		ath_htc_resume_btcoex_work(priv);
+	}
+}
+
+void ath9k_htc_stop_btcoex(struct ath9k_htc_priv *priv)
+{
+	struct ath_hw *ah = priv->ah;
+
+	if (ah->btcoex_hw.enabled &&
+	    ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
+		if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
+			ath_htc_cancel_btcoex_work(priv);
+		ath9k_hw_btcoex_disable(ah);
+	}
+}
+
+void ath9k_htc_init_btcoex(struct ath9k_htc_priv *priv, char *product)
+{
+	struct ath_hw *ah = priv->ah;
+	struct ath_common *common = ath9k_hw_common(ah);
+	int qnum;
+
+	/*
+	 * Check if BTCOEX is globally disabled.
+	 */
+	if (!common->btcoex_enabled) {
+		ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_NONE;
+		return;
+	}
+
+	if (product && strncmp(product, ATH_HTC_BTCOEX_PRODUCT_ID, 5) == 0) {
+		ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_3WIRE;
+	}
+
+	switch (ath9k_hw_get_btcoex_scheme(priv->ah)) {
+	case ATH_BTCOEX_CFG_NONE:
+		break;
+	case ATH_BTCOEX_CFG_3WIRE:
+		priv->ah->btcoex_hw.btactive_gpio = 7;
+		priv->ah->btcoex_hw.btpriority_gpio = 6;
+		priv->ah->btcoex_hw.wlanactive_gpio = 8;
+		priv->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
+		ath9k_hw_btcoex_init_3wire(priv->ah);
+		ath_htc_init_btcoex_work(priv);
+		qnum = priv->hwq_map[IEEE80211_AC_BE];
+		ath9k_hw_init_btcoex_hw(priv->ah, qnum);
+		break;
+	default:
+		WARN_ON(1);
+		break;
+	}
+}
+
+#endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */
+
+/*******/
+/* LED */
+/*******/
+
+#ifdef CONFIG_MAC80211_LEDS
+void ath9k_led_work(struct work_struct *work)
+{
+	struct ath9k_htc_priv *priv = container_of(work,
+						   struct ath9k_htc_priv,
+						   led_work);
+
+	ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin,
+			  (priv->brightness == LED_OFF));
+}
+
+static void ath9k_led_brightness(struct led_classdev *led_cdev,
+				 enum led_brightness brightness)
+{
+	struct ath9k_htc_priv *priv = container_of(led_cdev,
+						   struct ath9k_htc_priv,
+						   led_cdev);
+
+	/* Not locked, but it's just a tiny green light..*/
+	priv->brightness = brightness;
+	ieee80211_queue_work(priv->hw, &priv->led_work);
+}
+
+void ath9k_deinit_leds(struct ath9k_htc_priv *priv)
+{
+	if (!priv->led_registered)
+		return;
+
+	ath9k_led_brightness(&priv->led_cdev, LED_OFF);
+	led_classdev_unregister(&priv->led_cdev);
+	cancel_work_sync(&priv->led_work);
+
+	ath9k_hw_gpio_free(priv->ah, priv->ah->led_pin);
+}
+
+
+void ath9k_configure_leds(struct ath9k_htc_priv *priv)
+{
+	/* Configure gpio 1 for output */
+	ath9k_hw_gpio_request_out(priv->ah, priv->ah->led_pin,
+				  "ath9k-led",
+				  AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+	/* LED off, active low */
+	ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1);
+}
+
+void ath9k_init_leds(struct ath9k_htc_priv *priv)
+{
+	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;
+
+	if (!ath9k_htc_led_blink)
+		priv->led_cdev.default_trigger =
+			ieee80211_get_radio_led_name(priv->hw);
+
+	ath9k_configure_leds(priv);
+
+	snprintf(priv->led_name, sizeof(priv->led_name),
+		"ath9k_htc-%s", wiphy_name(priv->hw->wiphy));
+	priv->led_cdev.name = priv->led_name;
+	priv->led_cdev.brightness_set = ath9k_led_brightness;
+
+	ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &priv->led_cdev);
+	if (ret < 0)
+		return;
+
+	INIT_WORK(&priv->led_work, ath9k_led_work);
+	priv->led_registered = true;
+
+	return;
+}
+#endif
+
+/*******************/
+/*	Rfkill	   */
+/*******************/
+
+static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv)
+{
+	bool is_blocked;
+
+	ath9k_htc_ps_wakeup(priv);
+	is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) ==
+						 priv->ah->rfkill_polarity;
+	ath9k_htc_ps_restore(priv);
+
+	return is_blocked;
+}
+
+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);
+}