125 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * toshiba_wmi.c - Toshiba WMI Hotkey Driver4 *5 * Copyright (C) 2015 Azael Avalos <coproscefalo@gmail.com>6 */7 8#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt9 10#include <linux/kernel.h>11#include <linux/module.h>12#include <linux/init.h>13#include <linux/types.h>14#include <linux/acpi.h>15#include <linux/input.h>16#include <linux/input/sparse-keymap.h>17#include <linux/dmi.h>18 19MODULE_AUTHOR("Azael Avalos");20MODULE_DESCRIPTION("Toshiba WMI Hotkey Driver");21MODULE_LICENSE("GPL");22 23#define WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100"24 25MODULE_ALIAS("wmi:"WMI_EVENT_GUID);26 27static struct input_dev *toshiba_wmi_input_dev;28 29static const struct key_entry toshiba_wmi_keymap[] __initconst = {30 /* TODO: Add keymap values once found... */31 /*{ KE_KEY, 0x00, { KEY_ } },*/32 { KE_END, 0 }33};34 35static void toshiba_wmi_notify(union acpi_object *obj, void *context)36{37 if (!obj)38 return;39 40 /* TODO: Add proper checks once we have data */41 pr_debug("Unknown event received, obj type %x\n", obj->type);42}43 44static const struct dmi_system_id toshiba_wmi_dmi_table[] __initconst = {45 {46 .ident = "Toshiba laptop",47 .matches = {48 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),49 },50 },51 {}52};53 54static int __init toshiba_wmi_input_setup(void)55{56 acpi_status status;57 int err;58 59 toshiba_wmi_input_dev = input_allocate_device();60 if (!toshiba_wmi_input_dev)61 return -ENOMEM;62 63 toshiba_wmi_input_dev->name = "Toshiba WMI hotkeys";64 toshiba_wmi_input_dev->phys = "wmi/input0";65 toshiba_wmi_input_dev->id.bustype = BUS_HOST;66 67 err = sparse_keymap_setup(toshiba_wmi_input_dev,68 toshiba_wmi_keymap, NULL);69 if (err)70 goto err_free_dev;71 72 status = wmi_install_notify_handler(WMI_EVENT_GUID,73 toshiba_wmi_notify, NULL);74 if (ACPI_FAILURE(status)) {75 err = -EIO;76 goto err_free_dev;77 }78 79 err = input_register_device(toshiba_wmi_input_dev);80 if (err)81 goto err_remove_notifier;82 83 return 0;84 85 err_remove_notifier:86 wmi_remove_notify_handler(WMI_EVENT_GUID);87 err_free_dev:88 input_free_device(toshiba_wmi_input_dev);89 return err;90}91 92static void toshiba_wmi_input_destroy(void)93{94 wmi_remove_notify_handler(WMI_EVENT_GUID);95 input_unregister_device(toshiba_wmi_input_dev);96}97 98static int __init toshiba_wmi_init(void)99{100 int ret;101 102 if (!wmi_has_guid(WMI_EVENT_GUID) ||103 !dmi_check_system(toshiba_wmi_dmi_table))104 return -ENODEV;105 106 ret = toshiba_wmi_input_setup();107 if (ret) {108 pr_err("Failed to setup input device\n");109 return ret;110 }111 112 pr_info("Toshiba WMI Hotkey Driver\n");113 114 return 0;115}116 117static void __exit toshiba_wmi_exit(void)118{119 if (wmi_has_guid(WMI_EVENT_GUID))120 toshiba_wmi_input_destroy();121}122 123module_init(toshiba_wmi_init);124module_exit(toshiba_wmi_exit);125