| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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"); |