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/*
Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
<http://rt2x00.serialmonkey.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the
Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
Module: rt2x00lib
Abstract: rt2x00 led specific routines.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include "rt2x00.h"
#include "rt2x00lib.h"
void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev, int rssi)
{
if (!rt2x00dev->trigger_qual.registered)
return;
/*
* Led handling requires a positive value for the rssi,
* to do that correctly we need to add the correction.
*/
rssi += rt2x00dev->rssi_offset;
/*
* Get the rssi level, this is used to convert the rssi
* to a LED value inside the range LED_OFF - LED_FULL.
*/
if (rssi <= 30)
rssi = 0;
else if (rssi <= 39)
rssi = 1;
else if (rssi <= 49)
rssi = 2;
else if (rssi <= 53)
rssi = 3;
else if (rssi <= 63)
rssi = 4;
else
rssi = 5;
/*
* Note that we must _not_ send LED_OFF since the driver
* is going to calculate the value and might use it in a
* division.
*/
led_trigger_event(&rt2x00dev->trigger_qual.trigger,
((LED_FULL / 6) * rssi) + 1);
}
static int rt2x00leds_register_trigger(struct rt2x00_dev *rt2x00dev,
struct rt2x00_trigger *trigger,
const char *name)
{
int retval;
trigger->trigger.name = name;
retval = led_trigger_register(&trigger->trigger);
if (retval) {
ERROR(rt2x00dev, "Failed to register led trigger.\n");
return retval;
}
trigger->registered = 1;
return 0;
}
static int rt2x00leds_register_led(struct rt2x00_dev *rt2x00dev,
struct rt2x00_led *led,
enum led_type type,
const char *name, char *trigger)
{
struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);
int retval;
led->led_dev.name = name;
led->led_dev.brightness_set = rt2x00dev->ops->lib->led_brightness;
led->led_dev.default_trigger = trigger;
retval = led_classdev_register(device, &led->led_dev);
if (retval) {
ERROR(rt2x00dev, "Failed to register led handler.\n");
return retval;
}
led->rt2x00dev = rt2x00dev;
led->type = type;
led->registered = 1;
return 0;
}
int rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
{
char *trigger;
char dev_name[16];
char name[32];
int retval;
if (!rt2x00dev->ops->lib->led_brightness)
return 0;
snprintf(dev_name, sizeof(dev_name), "%s-%s",
rt2x00dev->ops->name, wiphy_name(rt2x00dev->hw->wiphy));
if (rt2x00dev->led_flags & LED_SUPPORT_RADIO) {
trigger = ieee80211_get_radio_led_name(rt2x00dev->hw);
snprintf(name, sizeof(name), "%s:radio", dev_name);
retval = rt2x00leds_register_led(rt2x00dev,
&rt2x00dev->led_radio,
LED_TYPE_RADIO,
name, trigger);
if (retval)
goto exit_fail;
}
if (rt2x00dev->led_flags & LED_SUPPORT_ASSOC) {
trigger = ieee80211_get_assoc_led_name(rt2x00dev->hw);
snprintf(name, sizeof(name), "%s:assoc", dev_name);
retval = rt2x00leds_register_led(rt2x00dev,
&rt2x00dev->led_assoc,
LED_TYPE_ASSOC,
name, trigger);
if (retval)
goto exit_fail;
}
if (rt2x00dev->led_flags & LED_SUPPORT_QUALITY) {
snprintf(name, sizeof(name), "%s:quality", dev_name);
retval = rt2x00leds_register_trigger(rt2x00dev,
&rt2x00dev->trigger_qual,
name);
retval = rt2x00leds_register_led(rt2x00dev,
&rt2x00dev->led_qual,
LED_TYPE_QUALITY,
name, name);
if (retval)
goto exit_fail;
}
return 0;
exit_fail:
rt2x00leds_unregister(rt2x00dev);
return retval;
}
static void rt2x00leds_unregister_trigger(struct rt2x00_trigger *trigger)
{
if (!trigger->registered)
return;
led_trigger_unregister(&trigger->trigger);
trigger->registered = 0;
}
static void rt2x00leds_unregister_led(struct rt2x00_led *led)
{
if (!led->registered)
return;
led_classdev_unregister(&led->led_dev);
led->led_dev.brightness_set(&led->led_dev, LED_OFF);
led->registered = 0;
}
void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev)
{
rt2x00leds_unregister_trigger(&rt2x00dev->trigger_qual);
rt2x00leds_unregister_led(&rt2x00dev->led_qual);
rt2x00leds_unregister_led(&rt2x00dev->led_assoc);
rt2x00leds_unregister_led(&rt2x00dev->led_radio);
}
void rt2x00leds_suspend(struct rt2x00_dev *rt2x00dev)
{
if (rt2x00dev->led_qual.registered)
led_classdev_suspend(&rt2x00dev->led_qual.led_dev);
if (rt2x00dev->led_assoc.registered)
led_classdev_suspend(&rt2x00dev->led_assoc.led_dev);
if (rt2x00dev->led_radio.registered)
led_classdev_suspend(&rt2x00dev->led_radio.led_dev);
}
void rt2x00leds_resume(struct rt2x00_dev *rt2x00dev)
{
if (rt2x00dev->led_radio.registered)
led_classdev_resume(&rt2x00dev->led_radio.led_dev);
if (rt2x00dev->led_assoc.registered)
led_classdev_resume(&rt2x00dev->led_assoc.led_dev);
if (rt2x00dev->led_qual.registered)
led_classdev_resume(&rt2x00dev->led_qual.led_dev);
}
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