forked from Minki/linux
1c80e9603f
Bug 150611 uncovered that the WMI ID used by the toshiba-wmi driver is not Toshiba specific, and as such, the driver was being loaded on non Toshiba laptops too. This patch adds a DMI matching list checking for TOSHIBA as the vendor, refusing to load if it is not. Also the WMI GUID was renamed, dropping the TOSHIBA_ prefix, to better reflect that such GUID is not a Toshiba specific one. Cc: <stable@vger.kernel.org> # 4.4+ Signed-off-by: Azael Avalos <coproscefalo@gmail.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
151 lines
3.5 KiB
C
151 lines
3.5 KiB
C
/*
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* toshiba_wmi.c - Toshiba WMI Hotkey Driver
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*
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* Copyright (C) 2015 Azael Avalos <coproscefalo@gmail.com>
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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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/acpi.h>
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#include <linux/input.h>
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#include <linux/input/sparse-keymap.h>
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#include <linux/dmi.h>
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MODULE_AUTHOR("Azael Avalos");
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MODULE_DESCRIPTION("Toshiba WMI Hotkey Driver");
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MODULE_LICENSE("GPL");
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#define WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100"
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MODULE_ALIAS("wmi:"WMI_EVENT_GUID);
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static struct input_dev *toshiba_wmi_input_dev;
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static const struct key_entry toshiba_wmi_keymap[] __initconst = {
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/* TODO: Add keymap values once found... */
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/*{ KE_KEY, 0x00, { KEY_ } },*/
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{ KE_END, 0 }
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};
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static void toshiba_wmi_notify(u32 value, void *context)
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{
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struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *obj;
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acpi_status status;
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status = wmi_get_event_data(value, &response);
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if (ACPI_FAILURE(status)) {
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pr_err("Bad event status 0x%x\n", status);
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return;
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}
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obj = (union acpi_object *)response.pointer;
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if (!obj)
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return;
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/* TODO: Add proper checks once we have data */
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pr_debug("Unknown event received, obj type %x\n", obj->type);
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kfree(response.pointer);
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}
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static struct dmi_system_id toshiba_wmi_dmi_table[] __initdata = {
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{
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.ident = "Toshiba laptop",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
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},
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},
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{}
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};
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static int __init toshiba_wmi_input_setup(void)
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{
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acpi_status status;
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int err;
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toshiba_wmi_input_dev = input_allocate_device();
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if (!toshiba_wmi_input_dev)
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return -ENOMEM;
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toshiba_wmi_input_dev->name = "Toshiba WMI hotkeys";
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toshiba_wmi_input_dev->phys = "wmi/input0";
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toshiba_wmi_input_dev->id.bustype = BUS_HOST;
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err = sparse_keymap_setup(toshiba_wmi_input_dev,
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toshiba_wmi_keymap, NULL);
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if (err)
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goto err_free_dev;
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status = wmi_install_notify_handler(WMI_EVENT_GUID,
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toshiba_wmi_notify, NULL);
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if (ACPI_FAILURE(status)) {
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err = -EIO;
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goto err_free_keymap;
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}
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err = input_register_device(toshiba_wmi_input_dev);
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if (err)
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goto err_remove_notifier;
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return 0;
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err_remove_notifier:
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wmi_remove_notify_handler(WMI_EVENT_GUID);
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err_free_keymap:
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sparse_keymap_free(toshiba_wmi_input_dev);
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err_free_dev:
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input_free_device(toshiba_wmi_input_dev);
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return err;
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}
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static void toshiba_wmi_input_destroy(void)
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{
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wmi_remove_notify_handler(WMI_EVENT_GUID);
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sparse_keymap_free(toshiba_wmi_input_dev);
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input_unregister_device(toshiba_wmi_input_dev);
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}
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static int __init toshiba_wmi_init(void)
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{
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int ret;
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if (!wmi_has_guid(WMI_EVENT_GUID) ||
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!dmi_check_system(toshiba_wmi_dmi_table))
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return -ENODEV;
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ret = toshiba_wmi_input_setup();
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if (ret) {
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pr_err("Failed to setup input device\n");
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return ret;
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}
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pr_info("Toshiba WMI Hotkey Driver\n");
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return 0;
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}
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static void __exit toshiba_wmi_exit(void)
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{
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if (wmi_has_guid(WMI_EVENT_GUID))
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toshiba_wmi_input_destroy();
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}
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module_init(toshiba_wmi_init);
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module_exit(toshiba_wmi_exit);
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