[net-next-2.6.git] / drivers / leds / leds-cobalt-raq.c

/*
 *  LEDs driver for the Cobalt Raq series.
 *
 *  Copyright (C) 2007  Yoichi Yuasa <yuasa@linux-mips.org>
 *
 *  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>

#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 __devinit 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 = ioremap(res->start, resource_size(res));
	if (!led_port)
		return -ENOMEM;

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

	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_iounmap:
	iounmap(led_port);
	led_port = NULL;

	return retval;
}

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

	if (led_port) {
		iounmap(led_port);
		led_port = NULL;
	}

	return 0;
}

static struct platform_driver cobalt_raq_led_driver = {
	.probe	= cobalt_raq_led_probe,
	.remove	= __devexit_p(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 <yuasa@linux-mips.org>
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>
	27
	28	#define LED_WEB 0x04
	29	#define LED_POWER_OFF 0x08
	30
	31	static void __iomem *led_port;
	32	static u8 led_value;
	33	static DEFINE_SPINLOCK(led_value_lock);
	34
	35	static void raq_web_led_set(struct led_classdev *led_cdev,
4d404fd5	36	enum led_brightness brightness)
97da7aaf YY	37	{
	38	unsigned long flags;
	39
	40	spin_lock_irqsave(&led_value_lock, flags);
	41
	42	if (brightness)
	43	led_value \|= LED_WEB;
	44	else
	45	led_value &= ~LED_WEB;
	46	writeb(led_value, led_port);
	47
	48	spin_unlock_irqrestore(&led_value_lock, flags);
	49	}
	50
	51	static struct led_classdev raq_web_led = {
db3f5207	52	.name = "raq::web",
97da7aaf YY	53	.brightness_set = raq_web_led_set,
	54	};
	55
	56	static void raq_power_off_led_set(struct led_classdev *led_cdev,
4d404fd5	57	enum led_brightness brightness)
97da7aaf YY	58	{
	59	unsigned long flags;
	60
	61	spin_lock_irqsave(&led_value_lock, flags);
	62
	63	if (brightness)
	64	led_value \|= LED_POWER_OFF;
	65	else
	66	led_value &= ~LED_POWER_OFF;
	67	writeb(led_value, led_port);
	68
	69	spin_unlock_irqrestore(&led_value_lock, flags);
	70	}
	71
	72	static struct led_classdev raq_power_off_led = {
db3f5207	73	.name = "raq::power-off",
97da7aaf YY	74	.brightness_set = raq_power_off_led_set,
	75	.default_trigger = "power-off",
	76	};
	77
	78	static int __devinit cobalt_raq_led_probe(struct platform_device *pdev)
	79	{
	80	struct resource *res;
	81	int retval;
	82
	83	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	84	if (!res)
	85	return -EBUSY;
	86
d3aad639	87	led_port = ioremap(res->start, resource_size(res));
97da7aaf YY	88	if (!led_port)
	89	return -ENOMEM;
	90
	91	retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
	92	if (retval)
	93	goto err_iounmap;
	94
	95	retval = led_classdev_register(&pdev->dev, &raq_web_led);
	96	if (retval)
	97	goto err_unregister;
	98
	99	return 0;
	100
	101	err_unregister:
	102	led_classdev_unregister(&raq_power_off_led);
	103
	104	err_iounmap:
	105	iounmap(led_port);
	106	led_port = NULL;
	107
	108	return retval;
	109	}
	110
	111	static int __devexit cobalt_raq_led_remove(struct platform_device *pdev)
	112	{
	113	led_classdev_unregister(&raq_power_off_led);
	114	led_classdev_unregister(&raq_web_led);
	115
	116	if (led_port) {
	117	iounmap(led_port);
	118	led_port = NULL;
	119	}
	120
	121	return 0;
	122	}
	123
	124	static struct platform_driver cobalt_raq_led_driver = {
	125	.probe = cobalt_raq_led_probe,
	126	.remove = __devexit_p(cobalt_raq_led_remove),
	127	.driver = {
	128	.name = "cobalt-raq-leds",
	129	.owner = THIS_MODULE,
	130	},
	131	};
	132
	133	static int __init cobalt_raq_led_init(void)
	134	{
	135	return platform_driver_register(&cobalt_raq_led_driver);
	136	}
	137
	138	module_init(cobalt_raq_led_init);