/*
* 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 "rtl8187_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->mode == 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->GPIO, 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->mode == 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->GPIO, 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 = hw->priv;
if (brightness == LED_OFF) {
queue_delayed_work(hw->workqueue, &priv->led_off, 0);
/* The LED is off for 1/20 sec so that it just blinks. */
queue_delayed_work(hw->workqueue, &priv->led_on, HZ / 20);
} else
queue_delayed_work(hw->workqueue, &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)
{
int err;
struct rtl8187_priv *priv = dev->priv;
if (led->dev)
return -EEXIST;
if (!default_trigger)
return -EINVAL;
led->dev = dev;
led->ledpin = ledpin;
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)
{
led_classdev_unregister(&led->led_dev);
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::tx", wiphy_name(dev->wiphy));
err = rtl8187_register_led(dev, &priv->led_tx, name,
ieee80211_get_tx_led_name(dev), ledpin);
if (err)
goto error;
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);
if (!err) {
queue_delayed_work(dev->workqueue, &priv->led_on, 0);
return;
}
/* registration of RX LED failed - unregister TX */
rtl8187_unregister_led(&priv->led_tx);
error:
/* If registration of either failed, cancel delayed work */
cancel_delayed_work_sync(&priv->led_off);
cancel_delayed_work_sync(&priv->led_on);
}
void rtl8187_leds_exit(struct ieee80211_hw *dev)
{
struct rtl8187_priv *priv = dev->priv;
rtl8187_unregister_led(&priv->led_tx);
/* turn the LED off before exiting */
queue_delayed_work(dev->workqueue, &priv->led_off, 0);
cancel_delayed_work_sync(&priv->led_off);
rtl8187_unregister_led(&priv->led_rx);
}
#endif /* def CONFIG_RTL8187_LED */
