1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Input Power Event -> APM Bridge
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (c) 2007 Richard Purdie
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/module.h>
11*4882a593Smuzhiyun #include <linux/input.h>
12*4882a593Smuzhiyun #include <linux/slab.h>
13*4882a593Smuzhiyun #include <linux/init.h>
14*4882a593Smuzhiyun #include <linux/tty.h>
15*4882a593Smuzhiyun #include <linux/delay.h>
16*4882a593Smuzhiyun #include <linux/pm.h>
17*4882a593Smuzhiyun #include <linux/apm-emulation.h>
18*4882a593Smuzhiyun
system_power_event(unsigned int keycode)19*4882a593Smuzhiyun static void system_power_event(unsigned int keycode)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun switch (keycode) {
22*4882a593Smuzhiyun case KEY_SUSPEND:
23*4882a593Smuzhiyun apm_queue_event(APM_USER_SUSPEND);
24*4882a593Smuzhiyun pr_info("Requesting system suspend...\n");
25*4882a593Smuzhiyun break;
26*4882a593Smuzhiyun default:
27*4882a593Smuzhiyun break;
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
apmpower_event(struct input_handle * handle,unsigned int type,unsigned int code,int value)31*4882a593Smuzhiyun static void apmpower_event(struct input_handle *handle, unsigned int type,
32*4882a593Smuzhiyun unsigned int code, int value)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun /* only react on key down events */
35*4882a593Smuzhiyun if (value != 1)
36*4882a593Smuzhiyun return;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun switch (type) {
39*4882a593Smuzhiyun case EV_PWR:
40*4882a593Smuzhiyun system_power_event(code);
41*4882a593Smuzhiyun break;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun default:
44*4882a593Smuzhiyun break;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
apmpower_connect(struct input_handler * handler,struct input_dev * dev,const struct input_device_id * id)48*4882a593Smuzhiyun static int apmpower_connect(struct input_handler *handler,
49*4882a593Smuzhiyun struct input_dev *dev,
50*4882a593Smuzhiyun const struct input_device_id *id)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun struct input_handle *handle;
53*4882a593Smuzhiyun int error;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
56*4882a593Smuzhiyun if (!handle)
57*4882a593Smuzhiyun return -ENOMEM;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun handle->dev = dev;
60*4882a593Smuzhiyun handle->handler = handler;
61*4882a593Smuzhiyun handle->name = "apm-power";
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun error = input_register_handle(handle);
64*4882a593Smuzhiyun if (error) {
65*4882a593Smuzhiyun pr_err("Failed to register input power handler, error %d\n",
66*4882a593Smuzhiyun error);
67*4882a593Smuzhiyun kfree(handle);
68*4882a593Smuzhiyun return error;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun error = input_open_device(handle);
72*4882a593Smuzhiyun if (error) {
73*4882a593Smuzhiyun pr_err("Failed to open input power device, error %d\n", error);
74*4882a593Smuzhiyun input_unregister_handle(handle);
75*4882a593Smuzhiyun kfree(handle);
76*4882a593Smuzhiyun return error;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun return 0;
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
apmpower_disconnect(struct input_handle * handle)82*4882a593Smuzhiyun static void apmpower_disconnect(struct input_handle *handle)
83*4882a593Smuzhiyun {
84*4882a593Smuzhiyun input_close_device(handle);
85*4882a593Smuzhiyun input_unregister_handle(handle);
86*4882a593Smuzhiyun kfree(handle);
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun static const struct input_device_id apmpower_ids[] = {
90*4882a593Smuzhiyun {
91*4882a593Smuzhiyun .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
92*4882a593Smuzhiyun .evbit = { BIT_MASK(EV_PWR) },
93*4882a593Smuzhiyun },
94*4882a593Smuzhiyun { },
95*4882a593Smuzhiyun };
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun MODULE_DEVICE_TABLE(input, apmpower_ids);
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun static struct input_handler apmpower_handler = {
100*4882a593Smuzhiyun .event = apmpower_event,
101*4882a593Smuzhiyun .connect = apmpower_connect,
102*4882a593Smuzhiyun .disconnect = apmpower_disconnect,
103*4882a593Smuzhiyun .name = "apm-power",
104*4882a593Smuzhiyun .id_table = apmpower_ids,
105*4882a593Smuzhiyun };
106*4882a593Smuzhiyun
apmpower_init(void)107*4882a593Smuzhiyun static int __init apmpower_init(void)
108*4882a593Smuzhiyun {
109*4882a593Smuzhiyun return input_register_handler(&apmpower_handler);
110*4882a593Smuzhiyun }
111*4882a593Smuzhiyun
apmpower_exit(void)112*4882a593Smuzhiyun static void __exit apmpower_exit(void)
113*4882a593Smuzhiyun {
114*4882a593Smuzhiyun input_unregister_handler(&apmpower_handler);
115*4882a593Smuzhiyun }
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun module_init(apmpower_init);
118*4882a593Smuzhiyun module_exit(apmpower_exit);
119*4882a593Smuzhiyun
120*4882a593Smuzhiyun MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
121*4882a593Smuzhiyun MODULE_DESCRIPTION("Input Power Event -> APM Bridge");
122*4882a593Smuzhiyun MODULE_LICENSE("GPL");
123