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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* atlas_btns.c - Atlas Wallmount Touchscreen ACPI Extras
*
* Copyright (C) 2006 Jaya Kumar
* Based on Toshiba ACPI by John Belmonte and ASUS ACPI
* This work was sponsored by CIS(M) Sdn Bhd.
*
* 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/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/types.h>
#include <asm/uaccess.h>
#include <acpi/acpi_drivers.h>
#define ACPI_ATLAS_NAME "Atlas ACPI"
#define ACPI_ATLAS_CLASS "Atlas"
#define ACPI_ATLAS_BUTTON_HID "ASIM0000"
static struct input_dev *input_dev;
/* button handling code */
static acpi_status acpi_atlas_button_setup(acpi_handle region_handle,
u32 function, void *handler_context, void **return_context)
{
*return_context =
(function != ACPI_REGION_DEACTIVATE) ? handler_context : NULL;
return AE_OK;
}
static acpi_status acpi_atlas_button_handler(u32 function,
acpi_physical_address address,
u32 bit_width, acpi_integer *value,
void *handler_context, void *region_context)
{
acpi_status status;
int keycode;
if (function == ACPI_WRITE) {
keycode = KEY_F1 + (address & 0x0F);
input_report_key(input_dev, keycode, !(address & 0x10));
input_sync(input_dev);
status = 0;
} else {
printk(KERN_WARNING "atlas: shrugged on unexpected function"
":function=%x,address=%lx,value=%x\n",
function, (unsigned long)address, (u32)*value);
status = -EINVAL;
}
return status;
}
static int atlas_acpi_button_add(struct acpi_device *device)
{
acpi_status status;
int err;
input_dev = input_allocate_device();
if (!input_dev) {
printk(KERN_ERR "atlas: unable to allocate input device\n");
return -ENOMEM;
}
input_dev->name = "Atlas ACPI button driver";
input_dev->phys = "ASIM0000/atlas/input0";
input_dev->id.bustype = BUS_HOST;
input_dev->evbit[LONG(EV_KEY)] = BIT(EV_KEY);
set_bit(KEY_F1, input_dev->keybit);
set_bit(KEY_F2, input_dev->keybit);
set_bit(KEY_F3, input_dev->keybit);
set_bit(KEY_F4, input_dev->keybit);
set_bit(KEY_F5, input_dev->keybit);
set_bit(KEY_F6, input_dev->keybit);
set_bit(KEY_F7, input_dev->keybit);
set_bit(KEY_F8, input_dev->keybit);
set_bit(KEY_F9, input_dev->keybit);
err = input_register_device(input_dev);
if (err) {
printk(KERN_ERR "atlas: couldn't register input device\n");
input_free_device(input_dev);
return err;
}
/* hookup button handler */
status = acpi_install_address_space_handler(device->handle,
0x81, &acpi_atlas_button_handler,
&acpi_atlas_button_setup, device);
if (ACPI_FAILURE(status)) {
printk(KERN_ERR "Atlas: Error installing addr spc handler\n");
input_unregister_device(input_dev);
status = -EINVAL;
}
return status;
}
static int atlas_acpi_button_remove(struct acpi_device *device, int type)
{
acpi_status status;
status = acpi_remove_address_space_handler(device->handle,
0x81, &acpi_atlas_button_handler);
if (ACPI_FAILURE(status)) {
printk(KERN_ERR "Atlas: Error removing addr spc handler\n");
status = -EINVAL;
}
input_unregister_device(input_dev);
return status;
}
static struct acpi_driver atlas_acpi_driver = {
.name = ACPI_ATLAS_NAME,
.class = ACPI_ATLAS_CLASS,
.ids = ACPI_ATLAS_BUTTON_HID,
.ops = {
.add = atlas_acpi_button_add,
.remove = atlas_acpi_button_remove,
},
};
static int __init atlas_acpi_init(void)
{
int result;
if (acpi_disabled)
return -ENODEV;
result = acpi_bus_register_driver(&atlas_acpi_driver);
if (result < 0) {
printk(KERN_ERR "Atlas ACPI: Unable to register driver\n");
return -ENODEV;
}
return 0;
}
static void __exit atlas_acpi_exit(void)
{
acpi_bus_unregister_driver(&atlas_acpi_driver);
}
module_init(atlas_acpi_init);
module_exit(atlas_acpi_exit);
MODULE_AUTHOR("Jaya Kumar");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Atlas button driver");
|
