1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
* leds-hp-disk.c - driver for HP "hard disk protection" LED
*
* Copyright (C) 2008 Pavel Machek
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/dmi.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/kthread.h>
#include <linux/leds.h>
#include <acpi/acpi_drivers.h>
#define DRIVER_NAME "leds-hp-disk"
#define ACPI_MDPS_CLASS "led"
/* For automatic insertion of the module */
static struct acpi_device_id hpled_device_ids[] = {
{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, hpled_device_ids);
struct acpi_hpled {
struct acpi_device *device; /* The ACPI device */
};
static struct acpi_hpled adev;
static acpi_status hpled_acpi_write(acpi_handle handle, int reg)
{
unsigned long long ret; /* Not used when writing */
union acpi_object in_obj[1];
struct acpi_object_list args = { 1, in_obj };
in_obj[0].type = ACPI_TYPE_INTEGER;
in_obj[0].integer.value = reg;
return acpi_evaluate_integer(handle, "ALED", &args, &ret);
}
static void hpled_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
hpled_acpi_write(adev.device->handle, !!value);
}
static struct led_classdev hpled_led = {
.name = "hp:red:hddprotection",
.default_trigger = "heartbeat",
.brightness_set = hpled_set,
};
#ifdef CONFIG_PM
static int hpled_suspend(struct acpi_device *dev, pm_message_t state)
{
led_classdev_suspend(&hpled_led);
return 0;
}
static int hpled_resume(struct acpi_device *dev)
{
led_classdev_resume(&hpled_led);
return 0;
}
#else
#define hpled_suspend NULL
#define hpled_resume NULL
#endif
static int hpled_add(struct acpi_device *device)
{
int ret;
if (!device)
return -EINVAL;
adev.device = device;
strcpy(acpi_device_name(device), DRIVER_NAME);
strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
device->driver_data = &adev;
ret = led_classdev_register(NULL, &hpled_led);
return ret;
}
static int hpled_remove(struct acpi_device *device, int type)
{
if (!device)
return -EINVAL;
led_classdev_unregister(&hpled_led);
return 0;
}
static struct acpi_driver leds_hp_driver = {
.name = DRIVER_NAME,
.class = ACPI_MDPS_CLASS,
.ids = hpled_device_ids,
.ops = {
.add = hpled_add,
.remove = hpled_remove,
.suspend = hpled_suspend,
.resume = hpled_resume,
}
};
static int __init hpled_init_module(void)
{
int ret;
if (acpi_disabled)
return -ENODEV;
ret = acpi_bus_register_driver(&leds_hp_driver);
if (ret < 0)
return ret;
printk(KERN_INFO DRIVER_NAME " driver loaded.\n");
return 0;
}
static void __exit hpled_exit_module(void)
{
acpi_bus_unregister_driver(&leds_hp_driver);
}
MODULE_DESCRIPTION("Driver for HP disk protection LED");
MODULE_AUTHOR("Pavel Machek <pavel@suse.cz>");
MODULE_LICENSE("GPL");
module_init(hpled_init_module);
module_exit(hpled_exit_module);
|
