1/*
 2 * LED Triggers Core
 3 * For the HP Jornada 620/660/680/690 handhelds
 4 *
 5 * Copyright 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
 6 *     this driver is based on leds-spitz.c by Richard Purdie.
 7 *
 8 * This program is free software; you can redistribute it and/or modify
 9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/platform_device.h>
16#include <linux/leds.h>
17#include <asm/hd64461.h>
18#include <mach/hp6xx.h>
19
20static void hp6xxled_green_set(struct led_classdev *led_cdev,
21			       enum led_brightness value)
22{
23	u8 v8;
24
25	v8 = inb(PKDR);
26	if (value)
27		outb(v8 & (~PKDR_LED_GREEN), PKDR);
28	else
29		outb(v8 | PKDR_LED_GREEN, PKDR);
30}
31
32static void hp6xxled_red_set(struct led_classdev *led_cdev,
33			     enum led_brightness value)
34{
35	u16 v16;
36
37	v16 = inw(HD64461_GPBDR);
38	if (value)
39		outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
40	else
41		outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
42}
43
44static struct led_classdev hp6xx_red_led = {
45	.name			= "hp6xx:red",
46	.default_trigger	= "hp6xx-charge",
47	.brightness_set		= hp6xxled_red_set,
48	.flags			= LED_CORE_SUSPENDRESUME,
49};
50
51static struct led_classdev hp6xx_green_led = {
52	.name			= "hp6xx:green",
53	.default_trigger	= "ide-disk",
54	.brightness_set		= hp6xxled_green_set,
55	.flags			= LED_CORE_SUSPENDRESUME,
56};
57
58static int hp6xxled_probe(struct platform_device *pdev)
59{
60	int ret;
61
62	ret = led_classdev_register(&pdev->dev, &hp6xx_red_led);
63	if (ret < 0)
64		return ret;
65
66	ret = led_classdev_register(&pdev->dev, &hp6xx_green_led);
67	if (ret < 0)
68		led_classdev_unregister(&hp6xx_red_led);
69
70	return ret;
71}
72
73static int hp6xxled_remove(struct platform_device *pdev)
74{
75	led_classdev_unregister(&hp6xx_red_led);
76	led_classdev_unregister(&hp6xx_green_led);
77
78	return 0;
79}
80
81static struct platform_driver hp6xxled_driver = {
82	.probe		= hp6xxled_probe,
83	.remove		= hp6xxled_remove,
84	.driver		= {
85		.name		= "hp6xx-led",
86		.owner		= THIS_MODULE,
87	},
88};
89
90module_platform_driver(hp6xxled_driver);
91
92MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
93MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
94MODULE_LICENSE("GPL");
95MODULE_ALIAS("platform:hp6xx-led");