1/*
2 * LEDs driver for Amstrad Delta (E3)
3 *
4 * Copyright (C) 2006 Jonathan McDowell <noodles@earth.li>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/kernel.h>
12#include <linux/init.h>
13#include <linux/platform_device.h>
14#include <linux/leds.h>
15#include <asm/arch/board-ams-delta.h>
16
17/*
18 * Our context
19 */
20struct ams_delta_led {
21	struct led_classdev	cdev;
22	u8			bitmask;
23};
24
25static void ams_delta_led_set(struct led_classdev *led_cdev,
26		enum led_brightness value)
27{
28	struct ams_delta_led *led_dev =
29		container_of(led_cdev, struct ams_delta_led, cdev);
30
31	if (value)
32		ams_delta_latch1_write(led_dev->bitmask, led_dev->bitmask);
33	else
34		ams_delta_latch1_write(led_dev->bitmask, 0);
35}
36
37static struct ams_delta_led ams_delta_leds[] = {
38	{
39		.cdev		= {
40			.name		= "ams-delta:camera",
41			.brightness_set = ams_delta_led_set,
42		},
43		.bitmask	= AMS_DELTA_LATCH1_LED_CAMERA,
44	},
45	{
46		.cdev		= {
47			.name		= "ams-delta:advert",
48			.brightness_set = ams_delta_led_set,
49		},
50		.bitmask	= AMS_DELTA_LATCH1_LED_ADVERT,
51	},
52	{
53		.cdev		= {
54			.name		= "ams-delta:email",
55			.brightness_set = ams_delta_led_set,
56		},
57		.bitmask	= AMS_DELTA_LATCH1_LED_EMAIL,
58	},
59	{
60		.cdev		= {
61			.name		= "ams-delta:handsfree",
62			.brightness_set = ams_delta_led_set,
63		},
64		.bitmask	= AMS_DELTA_LATCH1_LED_HANDSFREE,
65	},
66	{
67		.cdev		= {
68			.name		= "ams-delta:voicemail",
69			.brightness_set = ams_delta_led_set,
70		},
71		.bitmask	= AMS_DELTA_LATCH1_LED_VOICEMAIL,
72	},
73	{
74		.cdev		= {
75			.name		= "ams-delta:voice",
76			.brightness_set = ams_delta_led_set,
77		},
78		.bitmask	= AMS_DELTA_LATCH1_LED_VOICE,
79	},
80};
81
82#ifdef CONFIG_PM
83static int ams_delta_led_suspend(struct platform_device *dev,
84		pm_message_t state)
85{
86	int i;
87
88	for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++)
89		led_classdev_suspend(&ams_delta_leds[i].cdev);
90
91	return 0;
92}
93
94static int ams_delta_led_resume(struct platform_device *dev)
95{
96	int i;
97
98	for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++)
99		led_classdev_resume(&ams_delta_leds[i].cdev);
100
101	return 0;
102}
103#else
104#define ams_delta_led_suspend NULL
105#define ams_delta_led_resume NULL
106#endif
107
108static int ams_delta_led_probe(struct platform_device *pdev)
109{
110	int i;
111	int ret;
112
113	for (i = ret = 0; ret >= 0 && i < ARRAY_SIZE(ams_delta_leds); i++) {
114		ret = led_classdev_register(&pdev->dev,
115				&ams_delta_leds[i].cdev);
116	}
117
118	if (ret < 0 && i > 1) {
119		for (i = i - 2; i >= 0; i--)
120			led_classdev_unregister(&ams_delta_leds[i].cdev);
121	}
122
123	return ret;
124}
125
126static int ams_delta_led_remove(struct platform_device *pdev)
127{
128	int i;
129
130	for (i = ARRAY_SIZE(ams_delta_leds) - 1; i >= 0; i--)
131		led_classdev_unregister(&ams_delta_leds[i].cdev);
132
133	return 0;
134}
135
136static struct platform_driver ams_delta_led_driver = {
137	.probe		= ams_delta_led_probe,
138	.remove		= ams_delta_led_remove,
139	.suspend	= ams_delta_led_suspend,
140	.resume		= ams_delta_led_resume,
141	.driver		= {
142		.name = "ams-delta-led",
143	},
144};
145
146static int __init ams_delta_led_init(void)
147{
148	return platform_driver_register(&ams_delta_led_driver);
149}
150
151static void __exit ams_delta_led_exit(void)
152{
153	return platform_driver_unregister(&ams_delta_led_driver);
154}
155
156module_init(ams_delta_led_init);
157module_exit(ams_delta_led_exit);
158
159MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>");
160MODULE_DESCRIPTION("Amstrad Delta LED driver");
161MODULE_LICENSE("GPL");
162