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122 lines
2.4 KiB
122 lines
2.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Input Power Event -> APM Bridge |
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* |
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* Copyright (c) 2007 Richard Purdie |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/module.h> |
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#include <linux/input.h> |
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#include <linux/slab.h> |
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#include <linux/init.h> |
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#include <linux/tty.h> |
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#include <linux/delay.h> |
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#include <linux/pm.h> |
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#include <linux/apm-emulation.h> |
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static void system_power_event(unsigned int keycode) |
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{ |
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switch (keycode) { |
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case KEY_SUSPEND: |
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apm_queue_event(APM_USER_SUSPEND); |
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pr_info("Requesting system suspend...\n"); |
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break; |
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default: |
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break; |
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} |
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} |
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static void apmpower_event(struct input_handle *handle, unsigned int type, |
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unsigned int code, int value) |
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{ |
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/* only react on key down events */ |
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if (value != 1) |
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return; |
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switch (type) { |
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case EV_PWR: |
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system_power_event(code); |
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break; |
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default: |
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break; |
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} |
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} |
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static int apmpower_connect(struct input_handler *handler, |
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struct input_dev *dev, |
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const struct input_device_id *id) |
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{ |
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struct input_handle *handle; |
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int error; |
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handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL); |
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if (!handle) |
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return -ENOMEM; |
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handle->dev = dev; |
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handle->handler = handler; |
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handle->name = "apm-power"; |
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error = input_register_handle(handle); |
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if (error) { |
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pr_err("Failed to register input power handler, error %d\n", |
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error); |
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kfree(handle); |
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return error; |
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} |
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error = input_open_device(handle); |
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if (error) { |
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pr_err("Failed to open input power device, error %d\n", error); |
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input_unregister_handle(handle); |
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kfree(handle); |
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return error; |
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} |
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return 0; |
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} |
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static void apmpower_disconnect(struct input_handle *handle) |
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{ |
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input_close_device(handle); |
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input_unregister_handle(handle); |
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kfree(handle); |
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} |
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static const struct input_device_id apmpower_ids[] = { |
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{ |
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.flags = INPUT_DEVICE_ID_MATCH_EVBIT, |
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.evbit = { BIT_MASK(EV_PWR) }, |
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}, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(input, apmpower_ids); |
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static struct input_handler apmpower_handler = { |
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.event = apmpower_event, |
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.connect = apmpower_connect, |
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.disconnect = apmpower_disconnect, |
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.name = "apm-power", |
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.id_table = apmpower_ids, |
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}; |
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static int __init apmpower_init(void) |
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{ |
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return input_register_handler(&apmpower_handler); |
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} |
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static void __exit apmpower_exit(void) |
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{ |
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input_unregister_handler(&apmpower_handler); |
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} |
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module_init(apmpower_init); |
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module_exit(apmpower_exit); |
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MODULE_AUTHOR("Richard Purdie <[email protected]>"); |
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MODULE_DESCRIPTION("Input Power Event -> APM Bridge"); |
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MODULE_LICENSE("GPL");
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