drivers/net/wireless/realtek/rtl818x/rtl8187/leds.c - kernel/quantenna - Git at Google

 /*
  * Linux LED driver for RTL8187
  *
  * Copyright 2009 Larry Finger <Larry.Finger@lwfinger.net>
  *
  * Based on the LED handling in the r8187 driver, which is:
  * Copyright (c) Realtek Semiconductor Corp. All rights reserved.
  *
  * Thanks to Realtek for their support!
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */

 #ifdef CONFIG_RTL8187_LEDS

 #include <net/mac80211.h>
 #include <linux/usb.h>
 #include <linux/eeprom_93cx6.h>

 #include "rtl8187.h"
 #include "leds.h"

 static void led_turn_on(struct work_struct *work)
 {
 	/* As this routine does read/write operations on the hardware, it must
 	 * be run from a work queue.
 	 */
 	u8 reg;
 	struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv,
 				    led_on.work);
 	struct rtl8187_led *led = &priv->led_tx;

 	/* Don't change the LED, when the device is down. */
 	if (!priv->vif || priv->vif->type == NL80211_IFTYPE_UNSPECIFIED)
 		return ;

 	/* Skip if the LED is not registered. */
 	if (!led->dev)
 		return;
 	mutex_lock(&priv->conf_mutex);
 	switch (led->ledpin) {
 	case LED_PIN_GPIO0:
 		rtl818x_iowrite8(priv, &priv->map->GPIO0, 0x01);
 		rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0x00);
 		break;
 	case LED_PIN_LED0:
 		reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~(1 << 4);
 		rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
 		break;
 	case LED_PIN_LED1:
 		reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~(1 << 5);
 		rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
 		break;
 	case LED_PIN_HW:
 	default:
 		break;
 	}
 	mutex_unlock(&priv->conf_mutex);
 }

 static void led_turn_off(struct work_struct *work)
 {
 	/* As this routine does read/write operations on the hardware, it must
 	 * be run from a work queue.
 	 */
 	u8 reg;
 	struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv,
 				    led_off.work);
 	struct rtl8187_led *led = &priv->led_tx;

 	/* Don't change the LED, when the device is down. */
 	if (!priv->vif || priv->vif->type == NL80211_IFTYPE_UNSPECIFIED)
 		return ;

 	/* Skip if the LED is not registered. */
 	if (!led->dev)
 		return;
 	mutex_lock(&priv->conf_mutex);
 	switch (led->ledpin) {
 	case LED_PIN_GPIO0:
 		rtl818x_iowrite8(priv, &priv->map->GPIO0, 0x01);
 		rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0x01);
 		break;
 	case LED_PIN_LED0:
 		reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) | (1 << 4);
 		rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
 		break;
 	case LED_PIN_LED1:
 		reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) | (1 << 5);
 		rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
 		break;
 	case LED_PIN_HW:
 	default:
 		break;
 	}
 	mutex_unlock(&priv->conf_mutex);
 }

 /* Callback from the LED subsystem. */
 static void rtl8187_led_brightness_set(struct led_classdev *led_dev,
 				   enum led_brightness brightness)
 {
 	struct rtl8187_led *led = container_of(led_dev, struct rtl8187_led,
 					       led_dev);
 	struct ieee80211_hw *hw = led->dev;
 	struct rtl8187_priv *priv;
 	static bool radio_on;

 	if (!hw)
 		return;
 	priv = hw->priv;
 	if (led->is_radio) {
 		if (brightness == LED_FULL) {
 			ieee80211_queue_delayed_work(hw, &priv->led_on, 0);
 			radio_on = true;
 		} else if (radio_on) {
 			radio_on = false;
 			cancel_delayed_work(&priv->led_on);
 			ieee80211_queue_delayed_work(hw, &priv->led_off, 0);
 		}
 	} else if (radio_on) {
 		if (brightness == LED_OFF) {
 			ieee80211_queue_delayed_work(hw, &priv->led_off, 0);
 			/* The LED is off for 1/20 sec - it just blinks. */
 			ieee80211_queue_delayed_work(hw, &priv->led_on,
 						     HZ / 20);
 		} else
 			ieee80211_queue_delayed_work(hw, &priv->led_on, 0);
 	}
 }

 static int rtl8187_register_led(struct ieee80211_hw *dev,
 				struct rtl8187_led *led, const char *name,
 				const char *default_trigger, u8 ledpin,
 				bool is_radio)
 {
 	int err;
 	struct rtl8187_priv *priv = dev->priv;

 	if (led->dev)
 		return -EEXIST;
 	if (!default_trigger)
 		return -EINVAL;
 	led->dev = dev;
 	led->ledpin = ledpin;
 	led->is_radio = is_radio;
 	strncpy(led->name, name, sizeof(led->name));

 	led->led_dev.name = led->name;
 	led->led_dev.default_trigger = default_trigger;
 	led->led_dev.brightness_set = rtl8187_led_brightness_set;

 	err = led_classdev_register(&priv->udev->dev, &led->led_dev);
 	if (err) {
 		printk(KERN_INFO "LEDs: Failed to register %s\n", name);
 		led->dev = NULL;
 		return err;
 	}
 	return 0;
 }

 static void rtl8187_unregister_led(struct rtl8187_led *led)
 {
 	struct ieee80211_hw *hw = led->dev;
 	struct rtl8187_priv *priv = hw->priv;

 	led_classdev_unregister(&led->led_dev);
 	flush_delayed_work(&priv->led_off);
 	led->dev = NULL;
 }

 void rtl8187_leds_init(struct ieee80211_hw *dev, u16 custid)
 {
 	struct rtl8187_priv *priv = dev->priv;
 	char name[RTL8187_LED_MAX_NAME_LEN + 1];
 	u8 ledpin;
 	int err;

 	/* According to the vendor driver, the LED operation depends on the
 	 * customer ID encoded in the EEPROM
 	 */
 	printk(KERN_INFO "rtl8187: Customer ID is 0x%02X\n", custid);
 	switch (custid) {
 	case EEPROM_CID_RSVD0:
 	case EEPROM_CID_RSVD1:
 	case EEPROM_CID_SERCOMM_PS:
 	case EEPROM_CID_QMI:
 	case EEPROM_CID_DELL:
 	case EEPROM_CID_TOSHIBA:
 		ledpin = LED_PIN_GPIO0;
 		break;
 	case EEPROM_CID_ALPHA0:
 		ledpin = LED_PIN_LED0;
 		break;
 	case EEPROM_CID_HW:
 		ledpin = LED_PIN_HW;
 		break;
 	default:
 		ledpin = LED_PIN_GPIO0;
 	}

 	INIT_DELAYED_WORK(&priv->led_on, led_turn_on);
 	INIT_DELAYED_WORK(&priv->led_off, led_turn_off);

 	snprintf(name, sizeof(name),
 		 "rtl8187-%s::radio", wiphy_name(dev->wiphy));
 	err = rtl8187_register_led(dev, &priv->led_radio, name,
 			 ieee80211_get_radio_led_name(dev), ledpin, true);
 	if (err)
 		return;

 	snprintf(name, sizeof(name),
 		 "rtl8187-%s::tx", wiphy_name(dev->wiphy));
 	err = rtl8187_register_led(dev, &priv->led_tx, name,
 			 ieee80211_get_tx_led_name(dev), ledpin, false);
 	if (err)
 		goto err_tx;

 	snprintf(name, sizeof(name),
 		 "rtl8187-%s::rx", wiphy_name(dev->wiphy));
 	err = rtl8187_register_led(dev, &priv->led_rx, name,
 			 ieee80211_get_rx_led_name(dev), ledpin, false);
 	if (!err)
 		return;

 	/* registration of RX LED failed - unregister */
 	rtl8187_unregister_led(&priv->led_tx);
 err_tx:
 	rtl8187_unregister_led(&priv->led_radio);
 }

 void rtl8187_leds_exit(struct ieee80211_hw *dev)
 {
 	struct rtl8187_priv *priv = dev->priv;

 	rtl8187_unregister_led(&priv->led_radio);
 	rtl8187_unregister_led(&priv->led_rx);
 	rtl8187_unregister_led(&priv->led_tx);
 	cancel_delayed_work_sync(&priv->led_off);
 	cancel_delayed_work_sync(&priv->led_on);
 }
 #endif /* def CONFIG_RTL8187_LEDS */
	/*
	* Linux LED driver for RTL8187
	*
	* Copyright 2009 Larry Finger <Larry.Finger@lwfinger.net>
	*
	* Based on the LED handling in the r8187 driver, which is:
	* Copyright (c) Realtek Semiconductor Corp. All rights reserved.
	*
	* Thanks to Realtek for their support!
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*/

	#ifdef CONFIG_RTL8187_LEDS

	#include <net/mac80211.h>
	#include <linux/usb.h>
	#include <linux/eeprom_93cx6.h>

	#include "rtl8187.h"
	#include "leds.h"

	static void led_turn_on(struct work_struct *work)
	{
	/* As this routine does read/write operations on the hardware, it must
	* be run from a work queue.
	*/
	u8 reg;
	struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv,
	led_on.work);
	struct rtl8187_led *led = &priv->led_tx;

	/* Don't change the LED, when the device is down. */
	if (!priv->vif \|\| priv->vif->type == NL80211_IFTYPE_UNSPECIFIED)
	return ;

	/* Skip if the LED is not registered. */
	if (!led->dev)
	return;
	mutex_lock(&priv->conf_mutex);
	switch (led->ledpin) {
	case LED_PIN_GPIO0:
	rtl818x_iowrite8(priv, &priv->map->GPIO0, 0x01);
	rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0x00);
	break;
	case LED_PIN_LED0:
	reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~(1 << 4);
	rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
	break;
	case LED_PIN_LED1:
	reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~(1 << 5);
	rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
	break;
	case LED_PIN_HW:
	default:
	break;
	}
	mutex_unlock(&priv->conf_mutex);
	}

	static void led_turn_off(struct work_struct *work)
	{
	/* As this routine does read/write operations on the hardware, it must
	* be run from a work queue.
	*/
	u8 reg;
	struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv,
	led_off.work);
	struct rtl8187_led *led = &priv->led_tx;

	/* Don't change the LED, when the device is down. */
	if (!priv->vif \|\| priv->vif->type == NL80211_IFTYPE_UNSPECIFIED)
	return ;

	/* Skip if the LED is not registered. */
	if (!led->dev)
	return;
	mutex_lock(&priv->conf_mutex);
	switch (led->ledpin) {
	case LED_PIN_GPIO0:
	rtl818x_iowrite8(priv, &priv->map->GPIO0, 0x01);
	rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0x01);
	break;
	case LED_PIN_LED0:
	reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) \| (1 << 4);
	rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
	break;
	case LED_PIN_LED1:
	reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) \| (1 << 5);
	rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
	break;
	case LED_PIN_HW:
	default:
	break;
	}
	mutex_unlock(&priv->conf_mutex);
	}

	/* Callback from the LED subsystem. */
	static void rtl8187_led_brightness_set(struct led_classdev *led_dev,
	enum led_brightness brightness)
	{
	struct rtl8187_led *led = container_of(led_dev, struct rtl8187_led,
	led_dev);
	struct ieee80211_hw *hw = led->dev;
	struct rtl8187_priv *priv;
	static bool radio_on;

	if (!hw)
	return;
	priv = hw->priv;
	if (led->is_radio) {
	if (brightness == LED_FULL) {
	ieee80211_queue_delayed_work(hw, &priv->led_on, 0);
	radio_on = true;
	} else if (radio_on) {
	radio_on = false;
	cancel_delayed_work(&priv->led_on);
	ieee80211_queue_delayed_work(hw, &priv->led_off, 0);
	}
	} else if (radio_on) {
	if (brightness == LED_OFF) {
	ieee80211_queue_delayed_work(hw, &priv->led_off, 0);
	/* The LED is off for 1/20 sec - it just blinks. */
	ieee80211_queue_delayed_work(hw, &priv->led_on,
	HZ / 20);
	} else
	ieee80211_queue_delayed_work(hw, &priv->led_on, 0);
	}
	}

	static int rtl8187_register_led(struct ieee80211_hw *dev,
	struct rtl8187_led led, const char name,
	const char *default_trigger, u8 ledpin,
	bool is_radio)
	{
	int err;
	struct rtl8187_priv *priv = dev->priv;

	if (led->dev)
	return -EEXIST;
	if (!default_trigger)
	return -EINVAL;
	led->dev = dev;
	led->ledpin = ledpin;
	led->is_radio = is_radio;
	strncpy(led->name, name, sizeof(led->name));

	led->led_dev.name = led->name;
	led->led_dev.default_trigger = default_trigger;
	led->led_dev.brightness_set = rtl8187_led_brightness_set;

	err = led_classdev_register(&priv->udev->dev, &led->led_dev);
	if (err) {
	printk(KERN_INFO "LEDs: Failed to register %s\n", name);
	led->dev = NULL;
	return err;
	}
	return 0;
	}

	static void rtl8187_unregister_led(struct rtl8187_led *led)
	{
	struct ieee80211_hw *hw = led->dev;
	struct rtl8187_priv *priv = hw->priv;

	led_classdev_unregister(&led->led_dev);
	flush_delayed_work(&priv->led_off);
	led->dev = NULL;
	}

	void rtl8187_leds_init(struct ieee80211_hw *dev, u16 custid)
	{
	struct rtl8187_priv *priv = dev->priv;
	char name[RTL8187_LED_MAX_NAME_LEN + 1];
	u8 ledpin;
	int err;

	/* According to the vendor driver, the LED operation depends on the
	* customer ID encoded in the EEPROM
	*/
	printk(KERN_INFO "rtl8187: Customer ID is 0x%02X\n", custid);
	switch (custid) {
	case EEPROM_CID_RSVD0:
	case EEPROM_CID_RSVD1:
	case EEPROM_CID_SERCOMM_PS:
	case EEPROM_CID_QMI:
	case EEPROM_CID_DELL:
	case EEPROM_CID_TOSHIBA:
	ledpin = LED_PIN_GPIO0;
	break;
	case EEPROM_CID_ALPHA0:
	ledpin = LED_PIN_LED0;
	break;
	case EEPROM_CID_HW:
	ledpin = LED_PIN_HW;
	break;
	default:
	ledpin = LED_PIN_GPIO0;
	}

	INIT_DELAYED_WORK(&priv->led_on, led_turn_on);
	INIT_DELAYED_WORK(&priv->led_off, led_turn_off);

	snprintf(name, sizeof(name),
	"rtl8187-%s::radio", wiphy_name(dev->wiphy));
	err = rtl8187_register_led(dev, &priv->led_radio, name,
	ieee80211_get_radio_led_name(dev), ledpin, true);
	if (err)
	return;

	snprintf(name, sizeof(name),
	"rtl8187-%s::tx", wiphy_name(dev->wiphy));
	err = rtl8187_register_led(dev, &priv->led_tx, name,
	ieee80211_get_tx_led_name(dev), ledpin, false);
	if (err)
	goto err_tx;

	snprintf(name, sizeof(name),
	"rtl8187-%s::rx", wiphy_name(dev->wiphy));
	err = rtl8187_register_led(dev, &priv->led_rx, name,
	ieee80211_get_rx_led_name(dev), ledpin, false);
	if (!err)
	return;

	/* registration of RX LED failed - unregister */
	rtl8187_unregister_led(&priv->led_tx);
	err_tx:
	rtl8187_unregister_led(&priv->led_radio);
	}

	void rtl8187_leds_exit(struct ieee80211_hw *dev)
	{
	struct rtl8187_priv *priv = dev->priv;

	rtl8187_unregister_led(&priv->led_radio);
	rtl8187_unregister_led(&priv->led_rx);
	rtl8187_unregister_led(&priv->led_tx);
	cancel_delayed_work_sync(&priv->led_off);
	cancel_delayed_work_sync(&priv->led_on);
	}
	#endif /* def CONFIG_RTL8187_LEDS */