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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"); |
127 |
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Tags:
od-2011-09-04
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v2.6.34-rc5
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