106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
/*
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* Copyright 2006 - Florian Fainelli <florian@openwrt.org>
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*
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* Control the Cobalt Qube/RaQ front LED
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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#define LED_FRONT_LEFT 0x01
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#define LED_FRONT_RIGHT 0x02
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static void __iomem *led_port;
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static u8 led_value;
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static void qube_front_led_set(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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if (brightness)
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led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
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else
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led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT);
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writeb(led_value, led_port);
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}
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static struct led_classdev qube_front_led = {
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.name = "qube::front",
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.brightness = LED_FULL,
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.brightness_set = qube_front_led_set,
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.default_trigger = "default-on",
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};
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static int __devinit cobalt_qube_led_probe(struct platform_device *pdev)
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{
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struct resource *res;
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int retval;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -EBUSY;
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led_port = ioremap(res->start, resource_size(res));
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if (!led_port)
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return -ENOMEM;
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led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
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writeb(led_value, led_port);
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retval = led_classdev_register(&pdev->dev, &qube_front_led);
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if (retval)
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goto err_iounmap;
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return 0;
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err_iounmap:
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iounmap(led_port);
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led_port = NULL;
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return retval;
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}
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static int __devexit cobalt_qube_led_remove(struct platform_device *pdev)
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{
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led_classdev_unregister(&qube_front_led);
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if (led_port) {
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iounmap(led_port);
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led_port = NULL;
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}
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return 0;
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}
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/* work with hotplug and coldplug */
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MODULE_ALIAS("platform:cobalt-qube-leds");
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static struct platform_driver cobalt_qube_led_driver = {
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.probe = cobalt_qube_led_probe,
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.remove = __devexit_p(cobalt_qube_led_remove),
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.driver = {
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.name = "cobalt-qube-leds",
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.owner = THIS_MODULE,
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},
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};
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static int __init cobalt_qube_led_init(void)
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{
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return platform_driver_register(&cobalt_qube_led_driver);
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}
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static void __exit cobalt_qube_led_exit(void)
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{
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platform_driver_unregister(&cobalt_qube_led_driver);
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}
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module_init(cobalt_qube_led_init);
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module_exit(cobalt_qube_led_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Front LED support for Cobalt Server");
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MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
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