led.c
3.95 KB
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/*
* Common code for mac80211 Prism54 drivers
*
* Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
* Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
*
* Based on:
* - the islsm (softmac prism54) driver, which is:
* Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
* - stlc45xx driver
* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
*
* 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.
*/
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <net/mac80211.h>
#ifdef CONFIG_P54_LEDS
#include <linux/leds.h>
#endif /* CONFIG_P54_LEDS */
#include "p54.h"
#include "lmac.h"
static void p54_update_leds(struct work_struct *work)
{
struct p54_common *priv = container_of(work, struct p54_common,
led_work.work);
int err, i, tmp, blink_delay = 400;
bool rerun = false;
/* Don't toggle the LED, when the device is down. */
if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
return ;
for (i = 0; i < ARRAY_SIZE(priv->leds); i++)
if (priv->leds[i].toggled) {
priv->softled_state |= BIT(i);
tmp = 70 + 200 / (priv->leds[i].toggled);
if (tmp < blink_delay)
blink_delay = tmp;
if (priv->leds[i].led_dev.brightness == LED_OFF)
rerun = true;
priv->leds[i].toggled =
!!priv->leds[i].led_dev.brightness;
} else
priv->softled_state &= ~BIT(i);
err = p54_set_leds(priv);
if (err && net_ratelimit())
wiphy_err(priv->hw->wiphy,
"failed to update LEDs (%d).\n", err);
if (rerun)
ieee80211_queue_delayed_work(priv->hw, &priv->led_work,
msecs_to_jiffies(blink_delay));
}
static void p54_led_brightness_set(struct led_classdev *led_dev,
enum led_brightness brightness)
{
struct p54_led_dev *led = container_of(led_dev, struct p54_led_dev,
led_dev);
struct ieee80211_hw *dev = led->hw_dev;
struct p54_common *priv = dev->priv;
if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
return ;
if ((brightness) && (led->registered)) {
led->toggled++;
ieee80211_queue_delayed_work(priv->hw, &priv->led_work, HZ/10);
}
}
static int p54_register_led(struct p54_common *priv,
unsigned int led_index,
char *name, const char *trigger)
{
struct p54_led_dev *led = &priv->leds[led_index];
int err;
if (led->registered)
return -EEXIST;
snprintf(led->name, sizeof(led->name), "p54-%s::%s",
wiphy_name(priv->hw->wiphy), name);
led->hw_dev = priv->hw;
led->index = led_index;
led->led_dev.name = led->name;
led->led_dev.default_trigger = trigger;
led->led_dev.brightness_set = p54_led_brightness_set;
err = led_classdev_register(wiphy_dev(priv->hw->wiphy), &led->led_dev);
if (err)
wiphy_err(priv->hw->wiphy,
"Failed to register %s LED.\n", name);
else
led->registered = 1;
return err;
}
int p54_init_leds(struct p54_common *priv)
{
int err;
/*
* TODO:
* Figure out if the EEPROM contains some hints about the number
* of available/programmable LEDs of the device.
*/
INIT_DELAYED_WORK(&priv->led_work, p54_update_leds);
err = p54_register_led(priv, 0, "assoc",
ieee80211_get_assoc_led_name(priv->hw));
if (err)
return err;
err = p54_register_led(priv, 1, "tx",
ieee80211_get_tx_led_name(priv->hw));
if (err)
return err;
err = p54_register_led(priv, 2, "rx",
ieee80211_get_rx_led_name(priv->hw));
if (err)
return err;
err = p54_register_led(priv, 3, "radio",
ieee80211_get_radio_led_name(priv->hw));
if (err)
return err;
err = p54_set_leds(priv);
return err;
}
void p54_unregister_leds(struct p54_common *priv)
{
int i;
for (i = 0; i < ARRAY_SIZE(priv->leds); i++) {
if (priv->leds[i].registered) {
priv->leds[i].registered = false;
priv->leds[i].toggled = 0;
led_classdev_unregister(&priv->leds[i].led_dev);
}
}
cancel_delayed_work_sync(&priv->led_work);
}