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/*
* Atheros AR9170 driver
*
* LED handling
*
* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
*
* 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; see the file COPYING. If not, see
* http://www.gnu.org/licenses/.
*
* This file incorporates work covered by the following copyright and
* permission notice:
* Copyright (c) 2007-2008 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 "ar9170.h"
#include "cmd.h"
int ar9170_set_leds_state(struct ar9170 *ar, u32 led_state)
{
return ar9170_write_reg(ar, AR9170_GPIO_REG_DATA, led_state);
}
int ar9170_init_leds(struct ar9170 *ar)
{
int err;
/* disable LEDs */
/* GPIO [0/1 mode: output, 2/3: input] */
err = ar9170_write_reg(ar, AR9170_GPIO_REG_PORT_TYPE, 3);
if (err)
goto out;
/* GPIO 0/1 value: off */
err = ar9170_set_leds_state(ar, 0);
out:
return err;
}
#ifdef CONFIG_AR9170_LEDS
static void ar9170_update_leds(struct work_struct *work)
{
struct ar9170 *ar = container_of(work, struct ar9170, led_work.work);
int i, tmp, blink_delay = 1000;
u32 led_val = 0;
bool rerun = false;
if (unlikely(!IS_ACCEPTING_CMD(ar)))
return ;
mutex_lock(&ar->mutex);
for (i = 0; i < AR9170_NUM_LEDS; i++)
if (ar->leds[i].registered && ar->leds[i].toggled) {
led_val |= 1 << i;
tmp = 70 + 200 / (ar->leds[i].toggled);
if (tmp < blink_delay)
blink_delay = tmp;
if (ar->leds[i].toggled > 1)
ar->leds[i].toggled = 0;
rerun = true;
}
ar9170_set_leds_state(ar, led_val);
mutex_unlock(&ar->mutex);
if (rerun)
queue_delayed_work(ar->hw->workqueue, &ar->led_work,
msecs_to_jiffies(blink_delay));
}
static void ar9170_led_brightness_set(struct led_classdev *led,
enum led_brightness brightness)
{
struct ar9170_led *arl = container_of(led, struct ar9170_led, l);
struct ar9170 *ar = arl->ar;
if (unlikely(!arl->registered))
return ;
if (arl->last_state != !!brightness) {
arl->toggled++;
arl->last_state = !!brightness;
}
if (likely(IS_ACCEPTING_CMD(ar) && arl->toggled))
queue_delayed_work(ar->hw->workqueue, &ar->led_work, HZ/10);
}
static int ar9170_register_led(struct ar9170 *ar, int i, char *name,
char *trigger)
{
int err;
snprintf(ar->leds[i].name, sizeof(ar->leds[i].name),
"ar9170-%s::%s", wiphy_name(ar->hw->wiphy), name);
ar->leds[i].ar = ar;
ar->leds[i].l.name = ar->leds[i].name;
ar->leds[i].l.brightness_set = ar9170_led_brightness_set;
ar->leds[i].l.brightness = 0;
ar->leds[i].l.default_trigger = trigger;
err = led_classdev_register(wiphy_dev(ar->hw->wiphy),
&ar->leds[i].l);
if (err)
printk(KERN_ERR "%s: failed to register %s LED (%d).\n",
wiphy_name(ar->hw->wiphy), ar->leds[i].name, err);
else
ar->leds[i].registered = true;
return err;
}
void ar9170_unregister_leds(struct ar9170 *ar)
{
int i;
for (i = 0; i < AR9170_NUM_LEDS; i++)
if (ar->leds[i].registered) {
led_classdev_unregister(&ar->leds[i].l);
ar->leds[i].registered = false;
ar->leds[i].toggled = 0;
}
cancel_delayed_work_sync(&ar->led_work);
}
int ar9170_register_leds(struct ar9170 *ar)
{
int err;
INIT_DELAYED_WORK(&ar->led_work, ar9170_update_leds);
err = ar9170_register_led(ar, 0, "tx",
ieee80211_get_tx_led_name(ar->hw));
if (err)
goto fail;
err = ar9170_register_led(ar, 1, "assoc",
ieee80211_get_assoc_led_name(ar->hw));
if (err)
goto fail;
return 0;
fail:
ar9170_unregister_leds(ar);
return err;
}
#endif /* CONFIG_AR9170_LEDS */
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