[net-next-2.6.git] / drivers / net / wireless / ath / ar9170 / led.c

/*
 * 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)
		return;

	ieee80211_queue_delayed_work(ar->hw,
				     &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))
		ieee80211_queue_delayed_work(ar->hw, &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)
		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 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 */
Commit	Line	Data
e9348cdd CL	1	/*
	2	* Atheros AR9170 driver
	3	*
	4	* LED handling
	5	*
	6	* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; see the file COPYING. If not, see
	20	* http://www.gnu.org/licenses/.
	21	*
	22	* This file incorporates work covered by the following copyright and
	23	* permission notice:
	24	* Copyright (c) 2007-2008 Atheros Communications, Inc.
	25	*
	26	* Permission to use, copy, modify, and/or distribute this software for any
	27	* purpose with or without fee is hereby granted, provided that the above
	28	* copyright notice and this permission notice appear in all copies.
	29	*
	30	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	31	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	32	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	33	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	34	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	35	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	36	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	37	*/
	38
	39	#include "ar9170.h"
	40	#include "cmd.h"
	41
	42	int ar9170_set_leds_state(struct ar9170 *ar, u32 led_state)
	43	{
	44	return ar9170_write_reg(ar, AR9170_GPIO_REG_DATA, led_state);
	45	}
	46
	47	int ar9170_init_leds(struct ar9170 *ar)
	48	{
	49	int err;
	50
	51	/* disable LEDs */
	52	/* GPIO [0/1 mode: output, 2/3: input] */
	53	err = ar9170_write_reg(ar, AR9170_GPIO_REG_PORT_TYPE, 3);
	54	if (err)
	55	goto out;
	56
	57	/* GPIO 0/1 value: off */
	58	err = ar9170_set_leds_state(ar, 0);
	59
	60	out:
	61	return err;
	62	}
	63
	64	#ifdef CONFIG_AR9170_LEDS
65	static void ar9170_update_leds(struct work_struct *work)
66	{
67	struct ar9170 *ar = container_of(work, struct ar9170, led_work.work);
68	int i, tmp, blink_delay = 1000;
69	u32 led_val = 0;
70	bool rerun = false;
71
72	if (unlikely(!IS_ACCEPTING_CMD(ar)))
73	return ;
74
75	mutex_lock(&ar->mutex);
76	for (i = 0; i < AR9170_NUM_LEDS; i++)
6d7db193	77	if (ar->leds[i].registered && ar->leds[i].toggled) {
e9348cdd CL	78	led_val \|= 1 << i;
	79
	80	tmp = 70 + 200 / (ar->leds[i].toggled);
	81	if (tmp < blink_delay)
	82	blink_delay = tmp;
	83
	84	if (ar->leds[i].toggled > 1)
	85	ar->leds[i].toggled = 0;
	86
	87	rerun = true;
	88	}
	89
	90	ar9170_set_leds_state(ar, led_val);
	91	mutex_unlock(&ar->mutex);
	92
42935eca LR	93	if (!rerun)
	94	return;
	95
	96	ieee80211_queue_delayed_work(ar->hw,
	97	&ar->led_work,
	98	msecs_to_jiffies(blink_delay));
e9348cdd CL	99	}
	100
	101	static void ar9170_led_brightness_set(struct led_classdev *led,
	102	enum led_brightness brightness)
	103	{
	104	struct ar9170_led *arl = container_of(led, struct ar9170_led, l);
	105	struct ar9170 *ar = arl->ar;
	106
6d7db193 CL	107	if (unlikely(!arl->registered))
	108	return ;
	109
2431fe9a CL	110	if (arl->last_state != !!brightness) {
	111	arl->toggled++;
	112	arl->last_state = !!brightness;
	113	}
e9348cdd	114
2431fe9a	115	if (likely(IS_ACCEPTING_CMD(ar) && arl->toggled))
42935eca	116	ieee80211_queue_delayed_work(ar->hw, &ar->led_work, HZ/10);
e9348cdd CL	117	}
	118
	119	static int ar9170_register_led(struct ar9170 ar, int i, char name,
	120	char *trigger)
	121	{
	122	int err;
	123
	124	snprintf(ar->leds[i].name, sizeof(ar->leds[i].name),
	125	"ar9170-%s::%s", wiphy_name(ar->hw->wiphy), name);
	126
	127	ar->leds[i].ar = ar;
	128	ar->leds[i].l.name = ar->leds[i].name;
	129	ar->leds[i].l.brightness_set = ar9170_led_brightness_set;
	130	ar->leds[i].l.brightness = 0;
	131	ar->leds[i].l.default_trigger = trigger;
	132
	133	err = led_classdev_register(wiphy_dev(ar->hw->wiphy),
	134	&ar->leds[i].l);
	135	if (err)
c96c31e4 JP	136	wiphy_err(ar->hw->wiphy, "failed to register %s LED (%d).\n",
c96c31e4 JP	137	ar->leds[i].name, err);
e9348cdd CL	138	else
	139	ar->leds[i].registered = true;
	140
	141	return err;
	142	}
	143
	144	void ar9170_unregister_leds(struct ar9170 *ar)
	145	{
	146	int i;
	147
e9348cdd CL	148	for (i = 0; i < AR9170_NUM_LEDS; i++)
	149	if (ar->leds[i].registered) {
	150	led_classdev_unregister(&ar->leds[i].l);
	151	ar->leds[i].registered = false;
6d7db193	152	ar->leds[i].toggled = 0;
e9348cdd	153	}
6d7db193 CL	154
6d7db193 CL	155	cancel_delayed_work_sync(&ar->led_work);
e9348cdd CL	156	}
	157
	158	int ar9170_register_leds(struct ar9170 *ar)
	159	{
	160	int err;
	161
	162	INIT_DELAYED_WORK(&ar->led_work, ar9170_update_leds);
	163
	164	err = ar9170_register_led(ar, 0, "tx",
	165	ieee80211_get_tx_led_name(ar->hw));
	166	if (err)
	167	goto fail;
	168
	169	err = ar9170_register_led(ar, 1, "assoc",
	170	ieee80211_get_assoc_led_name(ar->hw));
	171	if (err)
	172	goto fail;
	173
	174	return 0;
	175
	176	fail:
	177	ar9170_unregister_leds(ar);
	178	return err;
	179	}
	180
	181	#endif /* CONFIG_AR9170_LEDS */