/*
* Atheros CARL9170 driver
*
* LED handling
*
* Copyright 2008 , Johannes Berg < johannes @ sipsolutions . net >
* Copyright 2009 , 2010 , Christian Lamparer < chunkeey @ googlemail . 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 ; 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 "carl9170.h"
#include "cmd.h"
int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state)
{
return carl9170_write_reg(ar, AR9170_GPIO_REG_PORT_DATA, led_state);
}
int carl9170_led_init(struct ar9170 *ar)
{
int err;
/* disable LEDs */
/* GPIO [0/1 mode: output, 2/3: input] */
err = carl9170_write_reg(ar, AR9170_GPIO_REG_PORT_TYPE, 3 );
if (err)
goto out;
/* GPIO 0/1 value: off */
err = carl9170_led_set_state(ar, 0 );
out:
return err;
}
#ifdef CONFIG_CARL9170_LEDS
static void carl9170_led_update(struct work_struct *work)
{
struct ar9170 *ar = container_of(work, struct ar9170, led_work.work);
int i, tmp = 300 , blink_delay = 1000 ;
u32 led_val = 0 ;
bool rerun = false ;
if (!IS_ACCEPTING_CMD(ar))
return ;
mutex_lock(&ar->mutex);
for (i = 0 ; i < AR9170_NUM_LEDS; i++) {
if (ar->leds[i].registered) {
if (ar->leds[i].last_state ||
ar->leds[i].toggled) {
if (ar->leds[i].toggled)
tmp = 70 + 200 / (ar->leds[i].toggled);
if (tmp < blink_delay)
blink_delay = tmp;
led_val |= 1 << i;
ar->leds[i].toggled = 0 ;
rerun = true ;
}
}
}
carl9170_led_set_state(ar, led_val);
mutex_unlock(&ar->mutex);
if (!rerun)
return ;
ieee80211_queue_delayed_work(ar->hw,
&ar->led_work,
msecs_to_jiffies(blink_delay));
}
static void carl9170_led_set_brightness(struct led_classdev *led,
enum led_brightness brightness)
{
struct carl9170_led *arl = container_of(led, struct carl9170_led, l);
struct ar9170 *ar = arl->ar;
if (!arl->registered)
return ;
if (arl->last_state != !!brightness) {
arl->toggled++;
arl->last_state = !!brightness;
}
if (likely(IS_ACCEPTING_CMD(ar) && arl->toggled))
ieee80211_queue_delayed_work(ar->hw, &ar->led_work, HZ / 10 );
}
static int carl9170_led_register_led(struct ar9170 *ar, int i, char *name,
const char *trigger)
{
int err;
snprintf(ar->leds[i].name, sizeof (ar->leds[i].name),
"carl9170-%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 = carl9170_led_set_brightness;
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) {
wiphy_err(ar->hw->wiphy, "failed to register %s LED (%d).\n" ,
ar->leds[i].name, err);
} else {
ar->leds[i].registered = true ;
}
return err;
}
void carl9170_led_unregister(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 carl9170_led_register(struct ar9170 *ar)
{
int err;
INIT_DELAYED_WORK(&ar->led_work, carl9170_led_update);
err = carl9170_led_register_led(ar, 0 , "tx" ,
ieee80211_get_tx_led_name(ar->hw));
if (err)
goto fail;
if (ar->features & CARL9170_ONE_LED)
return 0 ;
err = carl9170_led_register_led(ar, 1 , "assoc" ,
ieee80211_get_assoc_led_name(ar->hw));
if (err)
goto fail;
return 0 ;
fail:
carl9170_led_unregister(ar);
return err;
}
#endif /* CONFIG_CARL9170_LEDS */
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