82d4ec38479736275150cc433a70457a5f7abc2e
[linux-2.6.git] / drivers / leds / leds-hp6xx.c
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/kernel.h>
14 #include <linux/init.h>
15 #include <linux/platform_device.h>
16 #include <linux/leds.h>
17 #include <asm/hd64461.h>
18 #include <asm/hp6xx.h>
19
20 static void hp6xxled_green_set(struct led_classdev *led_cdev, enum led_brightness value)
21 {
22         u8 v8;
23
24         v8 = inb(PKDR);
25         if (value)
26                 outb(v8 & (~PKDR_LED_GREEN), PKDR);
27         else
28                 outb(v8 | PKDR_LED_GREEN, PKDR);
29 }
30
31 static void hp6xxled_red_set(struct led_classdev *led_cdev, enum led_brightness value)
32 {
33         u16 v16;
34
35         v16 = inw(HD64461_GPBDR);
36         if (value)
37                 outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
38         else
39                 outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
40 }
41
42 static struct led_classdev hp6xx_red_led = {
43         .name                   = "hp6xx:red",
44         .default_trigger        = "hp6xx-charge",
45         .brightness_set         = hp6xxled_red_set,
46 };
47
48 static struct led_classdev hp6xx_green_led = {
49         .name                   = "hp6xx:green",
50         .default_trigger        = "ide-disk",
51         .brightness_set         = hp6xxled_green_set,
52 };
53
54 #ifdef CONFIG_PM
55 static int hp6xxled_suspend(struct platform_device *dev, pm_message_t state)
56 {
57         led_classdev_suspend(&hp6xx_red_led);
58         led_classdev_suspend(&hp6xx_green_led);
59         return 0;
60 }
61
62 static int hp6xxled_resume(struct platform_device *dev)
63 {
64         led_classdev_resume(&hp6xx_red_led);
65         led_classdev_resume(&hp6xx_green_led);
66         return 0;
67 }
68 #endif
69
70 static int hp6xxled_probe(struct platform_device *pdev)
71 {
72         int ret;
73
74         ret = led_classdev_register(&pdev->dev, &hp6xx_red_led);
75         if (ret < 0)
76                 return ret;
77
78         ret = led_classdev_register(&pdev->dev, &hp6xx_green_led);
79         if (ret < 0)
80                 led_classdev_unregister(&hp6xx_red_led);
81
82         return ret;
83 }
84
85 static int hp6xxled_remove(struct platform_device *pdev)
86 {
87         led_classdev_unregister(&hp6xx_red_led);
88         led_classdev_unregister(&hp6xx_green_led);
89
90         return 0;
91 }
92
93 static struct platform_driver hp6xxled_driver = {
94         .probe          = hp6xxled_probe,
95         .remove         = hp6xxled_remove,
96 #ifdef CONFIG_PM
97         .suspend        = hp6xxled_suspend,
98         .resume         = hp6xxled_resume,
99 #endif
100         .driver         = {
101                 .name           = "hp6xx-led",
102         },
103 };
104
105 static int __init hp6xxled_init(void)
106 {
107         return platform_driver_register(&hp6xxled_driver);
108 }
109
110 static void __exit hp6xxled_exit(void)
111 {
112         platform_driver_unregister(&hp6xxled_driver);
113 }
114
115 module_init(hp6xxled_init);
116 module_exit(hp6xxled_exit);
117
118 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
119 MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
120 MODULE_LICENSE("GPL");