Merge tag 'nfs-for-3.6-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / input / apm-power.c
1 /*
2  *  Input Power Event -> APM Bridge
3  *
4  *  Copyright (c) 2007 Richard Purdie
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
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
14 #include <linux/module.h>
15 #include <linux/input.h>
16 #include <linux/slab.h>
17 #include <linux/init.h>
18 #include <linux/tty.h>
19 #include <linux/delay.h>
20 #include <linux/pm.h>
21 #include <linux/apm-emulation.h>
22
23 static void system_power_event(unsigned int keycode)
24 {
25         switch (keycode) {
26         case KEY_SUSPEND:
27                 apm_queue_event(APM_USER_SUSPEND);
28                 pr_info("Requesting system suspend...\n");
29                 break;
30         default:
31                 break;
32         }
33 }
34
35 static void apmpower_event(struct input_handle *handle, unsigned int type,
36                         unsigned int code, int value)
37 {
38         /* only react on key down events */
39         if (value != 1)
40                 return;
41
42         switch (type) {
43         case EV_PWR:
44                 system_power_event(code);
45                 break;
46
47         default:
48                 break;
49         }
50 }
51
52 static int apmpower_connect(struct input_handler *handler,
53                                           struct input_dev *dev,
54                                           const struct input_device_id *id)
55 {
56         struct input_handle *handle;
57         int error;
58
59         handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
60         if (!handle)
61                 return -ENOMEM;
62
63         handle->dev = dev;
64         handle->handler = handler;
65         handle->name = "apm-power";
66
67         error = input_register_handle(handle);
68         if (error) {
69                 pr_err("Failed to register input power handler, error %d\n",
70                        error);
71                 kfree(handle);
72                 return error;
73         }
74
75         error = input_open_device(handle);
76         if (error) {
77                 pr_err("Failed to open input power device, error %d\n", error);
78                 input_unregister_handle(handle);
79                 kfree(handle);
80                 return error;
81         }
82
83         return 0;
84 }
85
86 static void apmpower_disconnect(struct input_handle *handle)
87 {
88         input_close_device(handle);
89         input_unregister_handle(handle);
90         kfree(handle);
91 }
92
93 static const struct input_device_id apmpower_ids[] = {
94         {
95                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
96                 .evbit = { BIT_MASK(EV_PWR) },
97         },
98         { },
99 };
100
101 MODULE_DEVICE_TABLE(input, apmpower_ids);
102
103 static struct input_handler apmpower_handler = {
104         .event =        apmpower_event,
105         .connect =      apmpower_connect,
106         .disconnect =   apmpower_disconnect,
107         .name =         "apm-power",
108         .id_table =     apmpower_ids,
109 };
110
111 static int __init apmpower_init(void)
112 {
113         return input_register_handler(&apmpower_handler);
114 }
115
116 static void __exit apmpower_exit(void)
117 {
118         input_unregister_handler(&apmpower_handler);
119 }
120
121 module_init(apmpower_init);
122 module_exit(apmpower_exit);
123
124 MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
125 MODULE_DESCRIPTION("Input Power Event -> APM Bridge");
126 MODULE_LICENSE("GPL");