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#include <linux/module.h> 13#include <linux/input.h> 14#include <linux/slab.h> 15#include <linux/init.h> 16#include <linux/tty.h> 17#include <linux/delay.h> 18#include <linux/pm.h> 19#include <linux/apm-emulation.h> 20 21static void system_power_event(unsigned int keycode) 22{ 23 switch (keycode) { 24 case KEY_SUSPEND: 25 apm_queue_event(APM_USER_SUSPEND); 26 27 printk(KERN_INFO "apm-power: Requesting system suspend...\n"); 28 break; 29 default: 30 break; 31 } 32} 33 34static void apmpower_event(struct input_handle *handle, unsigned int type, 35 unsigned int code, int value) 36{ 37 /* only react on key down events */ 38 if (value != 1) 39 return; 40 41 switch (type) { 42 case EV_PWR: 43 system_power_event(code); 44 break; 45 46 default: 47 break; 48 } 49} 50 51static int apmpower_connect(struct input_handler *handler, 52 struct input_dev *dev, 53 const struct input_device_id *id) 54{ 55 struct input_handle *handle; 56 int error; 57 58 handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL); 59 if (!handle) 60 return -ENOMEM; 61 62 handle->dev = dev; 63 handle->handler = handler; 64 handle->name = "apm-power"; 65 66 error = input_register_handle(handle); 67 if (error) { 68 printk(KERN_ERR 69 "apm-power: Failed to register input power handler, " 70 "error %d\n", error); 71 kfree(handle); 72 return error; 73 } 74 75 error = input_open_device(handle); 76 if (error) { 77 printk(KERN_ERR 78 "apm-power: Failed to open input power device, " 79 "error %d\n", error); 80 input_unregister_handle(handle); 81 kfree(handle); 82 return error; 83 } 84 85 return 0; 86} 87 88static void apmpower_disconnect(struct input_handle *handle) 89{ 90 input_close_device(handle); 91 input_unregister_handle(handle); 92 kfree(handle); 93} 94 95static const struct input_device_id apmpower_ids[] = { 96 { 97 .flags = INPUT_DEVICE_ID_MATCH_EVBIT, 98 .evbit = { BIT_MASK(EV_PWR) }, 99 }, 100 { }, 101}; 102 103MODULE_DEVICE_TABLE(input, apmpower_ids); 104 105static struct input_handler apmpower_handler = { 106 .event = apmpower_event, 107 .connect = apmpower_connect, 108 .disconnect = apmpower_disconnect, 109 .name = "apm-power", 110 .id_table = apmpower_ids, 111}; 112 113static int __init apmpower_init(void) 114{ 115 return input_register_handler(&apmpower_handler); 116} 117 118static void __exit apmpower_exit(void) 119{ 120 input_unregister_handler(&apmpower_handler); 121} 122 123module_init(apmpower_init); 124module_exit(apmpower_exit); 125 126MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>"); 127MODULE_DESCRIPTION("Input Power Event -> APM Bridge"); 128MODULE_LICENSE("GPL"); 129