1/*
2 * Copyright 2006 - Florian Fainelli <florian@openwrt.org>
3 *
4 * Control the Cobalt Qube/RaQ front LED
5 */
6#include <linux/io.h>
7#include <linux/ioport.h>
8#include <linux/leds.h>
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/types.h>
12
13#define LED_FRONT_LEFT	0x01
14#define LED_FRONT_RIGHT	0x02
15
16static void __iomem *led_port;
17static u8 led_value;
18
19static void qube_front_led_set(struct led_classdev *led_cdev,
20			       enum led_brightness brightness)
21{
22	if (brightness)
23		led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
24	else
25		led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT);
26	writeb(led_value, led_port);
27}
28
29static struct led_classdev qube_front_led = {
30	.name			= "qube::front",
31	.brightness		= LED_FULL,
32	.brightness_set		= qube_front_led_set,
33	.default_trigger	= "default-on",
34};
35
36static int cobalt_qube_led_probe(struct platform_device *pdev)
37{
38	struct resource *res;
39	int retval;
40
41	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
42	if (!res)
43		return -EBUSY;
44
45	led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
46	if (!led_port)
47		return -ENOMEM;
48
49	led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
50	writeb(led_value, led_port);
51
52	retval = led_classdev_register(&pdev->dev, &qube_front_led);
53	if (retval)
54		goto err_null;
55
56	return 0;
57
58err_null:
59	led_port = NULL;
60
61	return retval;
62}
63
64static int cobalt_qube_led_remove(struct platform_device *pdev)
65{
66	led_classdev_unregister(&qube_front_led);
67
68	if (led_port)
69		led_port = NULL;
70
71	return 0;
72}
73
74static struct platform_driver cobalt_qube_led_driver = {
75	.probe	= cobalt_qube_led_probe,
76	.remove	= cobalt_qube_led_remove,
77	.driver	= {
78		.name	= "cobalt-qube-leds",
79	},
80};
81
82module_platform_driver(cobalt_qube_led_driver);
83
84MODULE_LICENSE("GPL");
85MODULE_DESCRIPTION("Front LED support for Cobalt Server");
86MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
87MODULE_ALIAS("platform:cobalt-qube-leds");
88