137 lines
3.2 KiB
C
Executable file
137 lines
3.2 KiB
C
Executable file
/*
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* drivers/debug/sec_key_notifier.c
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*
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* COPYRIGHT(C) 2016 Samsung Electronics Co., Ltd. All Right Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#define pr_fmg(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/notifier.h>
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#include <linux/slab.h>
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#include <linux/sec_debug.h>
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#include "sec_key_notifier.h"
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static DEFINE_SPINLOCK(sec_kn_event_lock);
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static ATOMIC_NOTIFIER_HEAD(sec_kn_notifier_list);
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int sec_kn_register_notifier(struct notifier_block *nb)
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{
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return atomic_notifier_chain_register(&sec_kn_notifier_list, nb);
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}
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int sec_kn_unregister_notifier(struct notifier_block *nb)
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{
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return atomic_notifier_chain_unregister(&sec_kn_notifier_list, nb);
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}
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static void sec_kn_event(struct input_handle *handle, unsigned int event_type,
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unsigned int event_code, int value)
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{
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struct sec_key_notifier_param param = {
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.keycode = event_code,
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.down = value,
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};
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int rc;
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spin_lock(&sec_kn_event_lock);
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/* BTN : 0x100 ~ 0x151, 0x2c0 ~ 0x2e7 */
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if (event_type != EV_KEY || (event_code >= 0x100 && event_code <= 0x151) || (event_code >= 0x2c0 && event_code <= 0x2e7))
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goto out;
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rc = atomic_notifier_call_chain(&sec_kn_notifier_list, 0, ¶m);
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out:
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spin_unlock(&sec_kn_event_lock);
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}
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static int sec_kn_connect(struct input_handler *handler, 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 = "sec_key_notifier";
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error = input_register_handle(handle);
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if (error)
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goto err_free_handle;
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error = input_open_device(handle);
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if (error)
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goto err_unregister_handle;
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return 0;
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err_unregister_handle:
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input_unregister_handle(handle);
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err_free_handle:
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kfree(handle);
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return error;
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}
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static void sec_kn_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 sec_kn_ids[] = {
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{
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.flags = INPUT_DEVICE_ID_MATCH_EVBIT,
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.evbit = { BIT_MASK(EV_KEY) },
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},
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{},
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};
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static struct input_handler sec_kn_handler = {
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.event = sec_kn_event,
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.connect = sec_kn_connect,
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.disconnect = sec_kn_disconnect,
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.name = "sec_key_notifier",
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.id_table = sec_kn_ids,
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};
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static int __init sec_kn_init(void)
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{
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int err;
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err = input_register_handler(&sec_kn_handler);
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return err;
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}
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static void __exit sec_kn_exit(void)
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{
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input_unregister_handler(&sec_kn_handler);
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}
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arch_initcall(sec_kn_init);
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module_exit(sec_kn_exit);
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