[linux-2.6-block.git] / drivers / leds / leds-cobalt-qube.c

/*
 * Copyright 2006 - Florian Fainelli <florian@openwrt.org>
 *
 * Control the Cobalt Qube/RaQ front LED
 */
#include <linux/init.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/types.h>

#define LED_FRONT_LEFT	0x01
#define LED_FRONT_RIGHT	0x02

static void __iomem *led_port;
static u8 led_value;

static void qube_front_led_set(struct led_classdev *led_cdev,
			       enum led_brightness brightness)
{
	if (brightness)
		led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
	else
		led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT);
	writeb(led_value, led_port);
}

static struct led_classdev qube_front_led = {
	.name			= "qube::front",
	.brightness		= LED_FULL,
	.brightness_set		= qube_front_led_set,
	.default_trigger	= "default-on",
};

static int __devinit cobalt_qube_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;

	led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
	writeb(led_value, led_port);

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

	return 0;

err_iounmap:
	iounmap(led_port);
	led_port = NULL;

	return retval;
}

static int __devexit cobalt_qube_led_remove(struct platform_device *pdev)
{
	led_classdev_unregister(&qube_front_led);

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

	return 0;
}

/* work with hotplug and coldplug */
MODULE_ALIAS("platform:cobalt-qube-leds");

static struct platform_driver cobalt_qube_led_driver = {
	.probe	= cobalt_qube_led_probe,
	.remove	= __devexit_p(cobalt_qube_led_remove),
	.driver	= {
		.name	= "cobalt-qube-leds",
		.owner	= THIS_MODULE,
	},
};

static int __init cobalt_qube_led_init(void)
{
	return platform_driver_register(&cobalt_qube_led_driver);
}

static void __exit cobalt_qube_led_exit(void)
{
	platform_driver_unregister(&cobalt_qube_led_driver);
}

module_init(cobalt_qube_led_init);
module_exit(cobalt_qube_led_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Front LED support for Cobalt Server");
MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
Commit	Line	Data
2fea6f35 FF	1	/*
	2	* Copyright 2006 - Florian Fainelli <florian@openwrt.org>
	3	*
	4	* Control the Cobalt Qube/RaQ front LED
	5	*/
4276fd73 YY	6	#include <linux/init.h>
	7	#include <linux/io.h>
	8	#include <linux/ioport.h>
	9	#include <linux/leds.h>
2fea6f35	10	#include <linux/module.h>
4276fd73	11	#include <linux/platform_device.h>
2fea6f35	12	#include <linux/types.h>
2fea6f35	13
4276fd73 YY	14	#define LED_FRONT_LEFT 0x01
	15	#define LED_FRONT_RIGHT 0x02
	16
	17	static void __iomem *led_port;
	18	static u8 led_value;
	19
	20	static void qube_front_led_set(struct led_classdev *led_cdev,
4d404fd5	21	enum led_brightness brightness)
2fea6f35 FF	22	{
2fea6f35 FF	23	if (brightness)
4276fd73	24	led_value = LED_FRONT_LEFT \| LED_FRONT_RIGHT;
2fea6f35	25	else
4276fd73 YY	26	led_value = ~(LED_FRONT_LEFT \| LED_FRONT_RIGHT);
	27	writeb(led_value, led_port);
	28	}
	29
	30	static struct led_classdev qube_front_led = {
db3f5207	31	.name = "qube::front",
4276fd73 YY	32	.brightness = LED_FULL,
4276fd73 YY	33	.brightness_set = qube_front_led_set,
51de036b	34	.default_trigger = "default-on",
4276fd73 YY	35	};
	36
	37	static int __devinit cobalt_qube_led_probe(struct platform_device *pdev)
	38	{
	39	struct resource *res;
	40	int retval;
	41
	42	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	43	if (!res)
	44	return -EBUSY;
	45
3c0f6e1e	46	led_port = ioremap(res->start, resource_size(res));
4276fd73 YY	47	if (!led_port)
	48	return -ENOMEM;
	49
	50	led_value = LED_FRONT_LEFT \| LED_FRONT_RIGHT;
	51	writeb(led_value, led_port);
	52
	53	retval = led_classdev_register(&pdev->dev, &qube_front_led);
	54	if (retval)
	55	goto err_iounmap;
	56
	57	return 0;
	58
	59	err_iounmap:
	60	iounmap(led_port);
	61	led_port = NULL;
	62
	63	return retval;
	64	}
	65
	66	static int __devexit cobalt_qube_led_remove(struct platform_device *pdev)
	67	{
	68	led_classdev_unregister(&qube_front_led);
	69
	70	if (led_port) {
	71	iounmap(led_port);
	72	led_port = NULL;
	73	}
	74
	75	return 0;
2fea6f35 FF	76	}
2fea6f35 FF	77
3c4ded97 KS	78	/* work with hotplug and coldplug */
	79	MODULE_ALIAS("platform:cobalt-qube-leds");
	80
4276fd73 YY	81	static struct platform_driver cobalt_qube_led_driver = {
	82	.probe = cobalt_qube_led_probe,
	83	.remove = __devexit_p(cobalt_qube_led_remove),
	84	.driver = {
	85	.name = "cobalt-qube-leds",
	86	.owner = THIS_MODULE,
	87	},
2fea6f35 FF	88	};
2fea6f35 FF	89
4276fd73	90	static int __init cobalt_qube_led_init(void)
2fea6f35	91	{
4276fd73	92	return platform_driver_register(&cobalt_qube_led_driver);
2fea6f35 FF	93	}
2fea6f35 FF	94
4276fd73	95	static void __exit cobalt_qube_led_exit(void)
2fea6f35	96	{
4276fd73	97	platform_driver_unregister(&cobalt_qube_led_driver);
2fea6f35 FF	98	}
2fea6f35 FF	99
4276fd73 YY	100	module_init(cobalt_qube_led_init);
4276fd73 YY	101	module_exit(cobalt_qube_led_exit);
2fea6f35 FF	102
	103	MODULE_LICENSE("GPL");
	104	MODULE_DESCRIPTION("Front LED support for Cobalt Server");
	105	MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");