148 lines
3.4 KiB
C
148 lines
3.4 KiB
C
/*
|
|
* toshiba_wmi.c - Toshiba WMI Hotkey Driver
|
|
*
|
|
* Copyright (C) 2015 Azael Avalos <coproscefalo@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/input.h>
|
|
#include <linux/input/sparse-keymap.h>
|
|
#include <linux/dmi.h>
|
|
|
|
MODULE_AUTHOR("Azael Avalos");
|
|
MODULE_DESCRIPTION("Toshiba WMI Hotkey Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#define WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100"
|
|
|
|
MODULE_ALIAS("wmi:"WMI_EVENT_GUID);
|
|
|
|
static struct input_dev *toshiba_wmi_input_dev;
|
|
|
|
static const struct key_entry toshiba_wmi_keymap[] __initconst = {
|
|
/* TODO: Add keymap values once found... */
|
|
/*{ KE_KEY, 0x00, { KEY_ } },*/
|
|
{ KE_END, 0 }
|
|
};
|
|
|
|
static void toshiba_wmi_notify(u32 value, void *context)
|
|
{
|
|
struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
union acpi_object *obj;
|
|
acpi_status status;
|
|
|
|
status = wmi_get_event_data(value, &response);
|
|
if (ACPI_FAILURE(status)) {
|
|
pr_err("Bad event status 0x%x\n", status);
|
|
return;
|
|
}
|
|
|
|
obj = (union acpi_object *)response.pointer;
|
|
if (!obj)
|
|
return;
|
|
|
|
/* TODO: Add proper checks once we have data */
|
|
pr_debug("Unknown event received, obj type %x\n", obj->type);
|
|
|
|
kfree(response.pointer);
|
|
}
|
|
|
|
static const struct dmi_system_id toshiba_wmi_dmi_table[] __initconst = {
|
|
{
|
|
.ident = "Toshiba laptop",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
|
|
},
|
|
},
|
|
{}
|
|
};
|
|
|
|
static int __init toshiba_wmi_input_setup(void)
|
|
{
|
|
acpi_status status;
|
|
int err;
|
|
|
|
toshiba_wmi_input_dev = input_allocate_device();
|
|
if (!toshiba_wmi_input_dev)
|
|
return -ENOMEM;
|
|
|
|
toshiba_wmi_input_dev->name = "Toshiba WMI hotkeys";
|
|
toshiba_wmi_input_dev->phys = "wmi/input0";
|
|
toshiba_wmi_input_dev->id.bustype = BUS_HOST;
|
|
|
|
err = sparse_keymap_setup(toshiba_wmi_input_dev,
|
|
toshiba_wmi_keymap, NULL);
|
|
if (err)
|
|
goto err_free_dev;
|
|
|
|
status = wmi_install_notify_handler(WMI_EVENT_GUID,
|
|
toshiba_wmi_notify, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
err = -EIO;
|
|
goto err_free_dev;
|
|
}
|
|
|
|
err = input_register_device(toshiba_wmi_input_dev);
|
|
if (err)
|
|
goto err_remove_notifier;
|
|
|
|
return 0;
|
|
|
|
err_remove_notifier:
|
|
wmi_remove_notify_handler(WMI_EVENT_GUID);
|
|
err_free_dev:
|
|
input_free_device(toshiba_wmi_input_dev);
|
|
return err;
|
|
}
|
|
|
|
static void toshiba_wmi_input_destroy(void)
|
|
{
|
|
wmi_remove_notify_handler(WMI_EVENT_GUID);
|
|
input_unregister_device(toshiba_wmi_input_dev);
|
|
}
|
|
|
|
static int __init toshiba_wmi_init(void)
|
|
{
|
|
int ret;
|
|
|
|
if (!wmi_has_guid(WMI_EVENT_GUID) ||
|
|
!dmi_check_system(toshiba_wmi_dmi_table))
|
|
return -ENODEV;
|
|
|
|
ret = toshiba_wmi_input_setup();
|
|
if (ret) {
|
|
pr_err("Failed to setup input device\n");
|
|
return ret;
|
|
}
|
|
|
|
pr_info("Toshiba WMI Hotkey Driver\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit toshiba_wmi_exit(void)
|
|
{
|
|
if (wmi_has_guid(WMI_EVENT_GUID))
|
|
toshiba_wmi_input_destroy();
|
|
}
|
|
|
|
module_init(toshiba_wmi_init);
|
|
module_exit(toshiba_wmi_exit);
|