[linux.git] / drivers / leds / leds-cobalt-raq.c

/*
 *  LEDs driver for the Cobalt Raq series.
 *
 *  Copyright (C) 2007  Yoichi Yuasa <[email protected]>
 *
 *  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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
#include <linux/init.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/export.h>

#define LED_WEB		0x04
#define LED_POWER_OFF	0x08

static void __iomem *led_port;
static u8 led_value;
static DEFINE_SPINLOCK(led_value_lock);

static void raq_web_led_set(struct led_classdev *led_cdev,
			    enum led_brightness brightness)
{
	unsigned long flags;

	spin_lock_irqsave(&led_value_lock, flags);

	if (brightness)
		led_value |= LED_WEB;
	else
		led_value &= ~LED_WEB;
	writeb(led_value, led_port);

	spin_unlock_irqrestore(&led_value_lock, flags);
}

static struct led_classdev raq_web_led = {
	.name		= "raq::web",
	.brightness_set	= raq_web_led_set,
};

static void raq_power_off_led_set(struct led_classdev *led_cdev,
				  enum led_brightness brightness)
{
	unsigned long flags;

	spin_lock_irqsave(&led_value_lock, flags);

	if (brightness)
		led_value |= LED_POWER_OFF;
	else
		led_value &= ~LED_POWER_OFF;
	writeb(led_value, led_port);

	spin_unlock_irqrestore(&led_value_lock, flags);
}

static struct led_classdev raq_power_off_led = {
	.name			= "raq::power-off",
	.brightness_set		= raq_power_off_led_set,
	.default_trigger	= "power-off",
};

static int cobalt_raq_led_probe(struct platform_device *pdev)
{
	struct resource *res;
	int retval;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
		return -EBUSY;

	led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
	if (!led_port)
		return -ENOMEM;

	retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
	if (retval)
		goto err_null;

	retval = led_classdev_register(&pdev->dev, &raq_web_led);
	if (retval)
		goto err_unregister;

	return 0;

err_unregister:
	led_classdev_unregister(&raq_power_off_led);

err_null:
	led_port = NULL;

	return retval;
}

static int cobalt_raq_led_remove(struct platform_device *pdev)
{
	led_classdev_unregister(&raq_power_off_led);
	led_classdev_unregister(&raq_web_led);

	if (led_port)
		led_port = NULL;

	return 0;
}

static struct platform_driver cobalt_raq_led_driver = {
	.probe	= cobalt_raq_led_probe,
	.remove	= cobalt_raq_led_remove,
	.driver = {
		.name	= "cobalt-raq-leds",
		.owner	= THIS_MODULE,
	},
};

static int __init cobalt_raq_led_init(void)
{
	return platform_driver_register(&cobalt_raq_led_driver);
}

module_init(cobalt_raq_led_init);
Commit	Line	Data
97da7aaf YY	1	/*
	2	* LEDs driver for the Cobalt Raq series.
	3	*
ada8e951	4	* Copyright (C) 2007 Yoichi Yuasa <[email protected]>
97da7aaf YY	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
4d404fd5	18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
97da7aaf YY	19	*/
	20	#include <linux/init.h>
	21	#include <linux/io.h>
	22	#include <linux/ioport.h>
	23	#include <linux/leds.h>
	24	#include <linux/platform_device.h>
	25	#include <linux/spinlock.h>
	26	#include <linux/types.h>
d131c496	27	#include <linux/export.h>
97da7aaf YY	28
	29	#define LED_WEB 0x04
	30	#define LED_POWER_OFF 0x08
	31
	32	static void __iomem *led_port;
	33	static u8 led_value;
	34	static DEFINE_SPINLOCK(led_value_lock);
	35
	36	static void raq_web_led_set(struct led_classdev *led_cdev,
4d404fd5	37	enum led_brightness brightness)
97da7aaf YY	38	{
	39	unsigned long flags;
	40
	41	spin_lock_irqsave(&led_value_lock, flags);
	42
	43	if (brightness)
	44	led_value \|= LED_WEB;
	45	else
	46	led_value &= ~LED_WEB;
	47	writeb(led_value, led_port);
	48
	49	spin_unlock_irqrestore(&led_value_lock, flags);
	50	}
	51
	52	static struct led_classdev raq_web_led = {
db3f5207	53	.name = "raq::web",
97da7aaf YY	54	.brightness_set = raq_web_led_set,
	55	};
	56
	57	static void raq_power_off_led_set(struct led_classdev *led_cdev,
4d404fd5	58	enum led_brightness brightness)
97da7aaf YY	59	{
	60	unsigned long flags;
	61
	62	spin_lock_irqsave(&led_value_lock, flags);
	63
	64	if (brightness)
	65	led_value \|= LED_POWER_OFF;
	66	else
	67	led_value &= ~LED_POWER_OFF;
	68	writeb(led_value, led_port);
	69
	70	spin_unlock_irqrestore(&led_value_lock, flags);
	71	}
	72
	73	static struct led_classdev raq_power_off_led = {
db3f5207	74	.name = "raq::power-off",
97da7aaf YY	75	.brightness_set = raq_power_off_led_set,
	76	.default_trigger = "power-off",
	77	};
	78
98ea1ea2	79	static int cobalt_raq_led_probe(struct platform_device *pdev)
97da7aaf YY	80	{
	81	struct resource *res;
	82	int retval;
	83
	84	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	85	if (!res)
	86	return -EBUSY;
	87
50e51943	88	led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
97da7aaf YY	89	if (!led_port)
	90	return -ENOMEM;
	91
	92	retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
	93	if (retval)
50e51943	94	goto err_null;
97da7aaf YY	95
	96	retval = led_classdev_register(&pdev->dev, &raq_web_led);
	97	if (retval)
	98	goto err_unregister;
	99
	100	return 0;
	101
	102	err_unregister:
	103	led_classdev_unregister(&raq_power_off_led);
	104
50e51943	105	err_null:
97da7aaf YY	106	led_port = NULL;
	107
	108	return retval;
	109	}
	110
678e8a6b	111	static int cobalt_raq_led_remove(struct platform_device *pdev)
97da7aaf YY	112	{
	113	led_classdev_unregister(&raq_power_off_led);
	114	led_classdev_unregister(&raq_web_led);
	115
50e51943	116	if (led_port)
97da7aaf	117	led_port = NULL;
97da7aaf YY	118
	119	return 0;
	120	}
	121
	122	static struct platform_driver cobalt_raq_led_driver = {
	123	.probe = cobalt_raq_led_probe,
df07cf81	124	.remove = cobalt_raq_led_remove,
97da7aaf YY	125	.driver = {
	126	.name = "cobalt-raq-leds",
	127	.owner = THIS_MODULE,
	128	},
	129	};
	130
	131	static int __init cobalt_raq_led_init(void)
	132	{
	133	return platform_driver_register(&cobalt_raq_led_driver);
	134	}
	135
	136	module_init(cobalt_raq_led_init);