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/*
* 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>");
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