765 строки
20 KiB
C
765 строки
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Dell WMI hotkeys
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*
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* Copyright (C) 2008 Red Hat <mjg@redhat.com>
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* Copyright (C) 2014-2015 Pali Rohár <pali@kernel.org>
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*
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* Portions based on wistron_btns.c:
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* Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
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* Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
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* Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
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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/slab.h>
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#include <linux/types.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/acpi.h>
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#include <linux/string.h>
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#include <linux/dmi.h>
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#include <linux/wmi.h>
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#include <acpi/video.h>
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#include "dell-smbios.h"
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#include "dell-wmi-descriptor.h"
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MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
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MODULE_AUTHOR("Pali Rohár <pali@kernel.org>");
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MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver");
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MODULE_LICENSE("GPL");
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#define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492"
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static bool wmi_requires_smbios_request;
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struct dell_wmi_priv {
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struct input_dev *input_dev;
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u32 interface_version;
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};
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static int __init dmi_matched(const struct dmi_system_id *dmi)
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{
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wmi_requires_smbios_request = 1;
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return 1;
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}
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static const struct dmi_system_id dell_wmi_smbios_list[] __initconst = {
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{
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.callback = dmi_matched,
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.ident = "Dell Inspiron M5110",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
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},
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Vostro V131",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
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},
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},
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{ }
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};
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/*
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* Keymap for WMI events of type 0x0000
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*
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* Certain keys are flagged as KE_IGNORE. All of these are either
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* notifications (rather than requests for change) or are also sent
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* via the keyboard controller so should not be sent again.
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*/
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static const struct key_entry dell_wmi_keymap_type_0000[] = {
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{ KE_IGNORE, 0x003a, { KEY_CAPSLOCK } },
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/* Key code is followed by brightness level */
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{ KE_KEY, 0xe005, { KEY_BRIGHTNESSDOWN } },
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{ KE_KEY, 0xe006, { KEY_BRIGHTNESSUP } },
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/* Battery health status button */
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{ KE_KEY, 0xe007, { KEY_BATTERY } },
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/* Radio devices state change, key code is followed by other values */
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{ KE_IGNORE, 0xe008, { KEY_RFKILL } },
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{ KE_KEY, 0xe009, { KEY_EJECTCD } },
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/* Key code is followed by: next, active and attached devices */
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{ KE_KEY, 0xe00b, { KEY_SWITCHVIDEOMODE } },
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/* Key code is followed by keyboard illumination level */
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{ KE_IGNORE, 0xe00c, { KEY_KBDILLUMTOGGLE } },
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/* BIOS error detected */
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{ KE_IGNORE, 0xe00d, { KEY_RESERVED } },
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/* Battery was removed or inserted */
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{ KE_IGNORE, 0xe00e, { KEY_RESERVED } },
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/* Wifi Catcher */
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{ KE_KEY, 0xe011, { KEY_WLAN } },
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/* Ambient light sensor toggle */
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{ KE_IGNORE, 0xe013, { KEY_RESERVED } },
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{ KE_IGNORE, 0xe020, { KEY_MUTE } },
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/* Unknown, defined in ACPI DSDT */
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/* { KE_IGNORE, 0xe023, { KEY_RESERVED } }, */
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/* Untested, Dell Instant Launch key on Inspiron 7520 */
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/* { KE_IGNORE, 0xe024, { KEY_RESERVED } }, */
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/* Dell Instant Launch key */
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{ KE_KEY, 0xe025, { KEY_PROG4 } },
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/* Audio panel key */
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{ KE_IGNORE, 0xe026, { KEY_RESERVED } },
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/* LCD Display On/Off Control key */
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{ KE_KEY, 0xe027, { KEY_DISPLAYTOGGLE } },
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/* Untested, Multimedia key on Dell Vostro 3560 */
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/* { KE_IGNORE, 0xe028, { KEY_RESERVED } }, */
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/* Dell Instant Launch key */
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{ KE_KEY, 0xe029, { KEY_PROG4 } },
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/* Untested, Windows Mobility Center button on Inspiron 7520 */
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/* { KE_IGNORE, 0xe02a, { KEY_RESERVED } }, */
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/* Unknown, defined in ACPI DSDT */
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/* { KE_IGNORE, 0xe02b, { KEY_RESERVED } }, */
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/* Untested, Dell Audio With Preset Switch button on Inspiron 7520 */
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/* { KE_IGNORE, 0xe02c, { KEY_RESERVED } }, */
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{ KE_IGNORE, 0xe02e, { KEY_VOLUMEDOWN } },
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{ KE_IGNORE, 0xe030, { KEY_VOLUMEUP } },
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{ KE_IGNORE, 0xe033, { KEY_KBDILLUMUP } },
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{ KE_IGNORE, 0xe034, { KEY_KBDILLUMDOWN } },
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{ KE_IGNORE, 0xe03a, { KEY_CAPSLOCK } },
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/* NIC Link is Up */
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{ KE_IGNORE, 0xe043, { KEY_RESERVED } },
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/* NIC Link is Down */
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{ KE_IGNORE, 0xe044, { KEY_RESERVED } },
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/*
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* This entry is very suspicious!
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* Originally Matthew Garrett created this dell-wmi driver specially for
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* "button with a picture of a battery" which has event code 0xe045.
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* Later Mario Limonciello from Dell told us that event code 0xe045 is
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* reported by Num Lock and should be ignored because key is send also
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* by keyboard controller.
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* So for now we will ignore this event to prevent potential double
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* Num Lock key press.
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*/
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{ KE_IGNORE, 0xe045, { KEY_NUMLOCK } },
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/* Scroll lock and also going to tablet mode on portable devices */
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{ KE_IGNORE, 0xe046, { KEY_SCROLLLOCK } },
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/* Untested, going from tablet mode on portable devices */
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/* { KE_IGNORE, 0xe047, { KEY_RESERVED } }, */
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/* Dell Support Center key */
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{ KE_IGNORE, 0xe06e, { KEY_RESERVED } },
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{ KE_IGNORE, 0xe0f7, { KEY_MUTE } },
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{ KE_IGNORE, 0xe0f8, { KEY_VOLUMEDOWN } },
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{ KE_IGNORE, 0xe0f9, { KEY_VOLUMEUP } },
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};
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struct dell_bios_keymap_entry {
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u16 scancode;
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u16 keycode;
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};
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struct dell_bios_hotkey_table {
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struct dmi_header header;
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struct dell_bios_keymap_entry keymap[];
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};
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struct dell_dmi_results {
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int err;
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int keymap_size;
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struct key_entry *keymap;
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};
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/* Uninitialized entries here are KEY_RESERVED == 0. */
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static const u16 bios_to_linux_keycode[256] = {
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[0] = KEY_MEDIA,
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[1] = KEY_NEXTSONG,
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[2] = KEY_PLAYPAUSE,
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[3] = KEY_PREVIOUSSONG,
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[4] = KEY_STOPCD,
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[5] = KEY_UNKNOWN,
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[6] = KEY_UNKNOWN,
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[7] = KEY_UNKNOWN,
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[8] = KEY_WWW,
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[9] = KEY_UNKNOWN,
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[10] = KEY_VOLUMEDOWN,
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[11] = KEY_MUTE,
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[12] = KEY_VOLUMEUP,
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[13] = KEY_UNKNOWN,
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[14] = KEY_BATTERY,
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[15] = KEY_EJECTCD,
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[16] = KEY_UNKNOWN,
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[17] = KEY_SLEEP,
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[18] = KEY_PROG1,
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[19] = KEY_BRIGHTNESSDOWN,
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[20] = KEY_BRIGHTNESSUP,
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[21] = KEY_BRIGHTNESS_AUTO,
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[22] = KEY_KBDILLUMTOGGLE,
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[23] = KEY_UNKNOWN,
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[24] = KEY_SWITCHVIDEOMODE,
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[25] = KEY_UNKNOWN,
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[26] = KEY_UNKNOWN,
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[27] = KEY_SWITCHVIDEOMODE,
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[28] = KEY_UNKNOWN,
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[29] = KEY_UNKNOWN,
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[30] = KEY_PROG2,
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[31] = KEY_UNKNOWN,
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[32] = KEY_UNKNOWN,
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[33] = KEY_UNKNOWN,
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[34] = KEY_UNKNOWN,
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[35] = KEY_UNKNOWN,
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[36] = KEY_UNKNOWN,
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[37] = KEY_UNKNOWN,
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[38] = KEY_MICMUTE,
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[255] = KEY_PROG3,
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};
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/*
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* Keymap for WMI events of type 0x0010
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*
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* These are applied if the 0xB2 DMI hotkey table is present and doesn't
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* override them.
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*/
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static const struct key_entry dell_wmi_keymap_type_0010[] = {
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/* Fn-lock switched to function keys */
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{ KE_IGNORE, 0x0, { KEY_RESERVED } },
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/* Fn-lock switched to multimedia keys */
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{ KE_IGNORE, 0x1, { KEY_RESERVED } },
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/* Keyboard backlight change notification */
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{ KE_IGNORE, 0x3f, { KEY_RESERVED } },
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/* Backlight brightness level */
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{ KE_KEY, 0x57, { KEY_BRIGHTNESSDOWN } },
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{ KE_KEY, 0x58, { KEY_BRIGHTNESSUP } },
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/* Mic mute */
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{ KE_KEY, 0x150, { KEY_MICMUTE } },
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/* Fn-lock */
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{ KE_IGNORE, 0x151, { KEY_RESERVED } },
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/* Change keyboard illumination */
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{ KE_IGNORE, 0x152, { KEY_KBDILLUMTOGGLE } },
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/*
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* Radio disable (notify only -- there is no model for which the
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* WMI event is supposed to trigger an action).
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*/
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{ KE_IGNORE, 0x153, { KEY_RFKILL } },
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/* RGB keyboard backlight control */
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{ KE_IGNORE, 0x154, { KEY_RESERVED } },
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/*
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* Stealth mode toggle. This will "disable all lights and sounds".
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* The action is performed by the BIOS and EC; the WMI event is just
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* a notification. On the XPS 13 9350, this is Fn+F7, and there's
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* a BIOS setting to enable and disable the hotkey.
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*/
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{ KE_IGNORE, 0x155, { KEY_RESERVED } },
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/* Rugged magnetic dock attach/detach events */
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{ KE_IGNORE, 0x156, { KEY_RESERVED } },
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{ KE_IGNORE, 0x157, { KEY_RESERVED } },
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/* Rugged programmable (P1/P2/P3 keys) */
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{ KE_KEY, 0x850, { KEY_PROG1 } },
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{ KE_KEY, 0x851, { KEY_PROG2 } },
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{ KE_KEY, 0x852, { KEY_PROG3 } },
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/*
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* Radio disable (notify only -- there is no model for which the
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* WMI event is supposed to trigger an action).
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*/
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{ KE_IGNORE, 0xe008, { KEY_RFKILL } },
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/* Fn-lock */
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{ KE_IGNORE, 0xe035, { KEY_RESERVED } },
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};
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/*
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* Keymap for WMI events of type 0x0011
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*/
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static const struct key_entry dell_wmi_keymap_type_0011[] = {
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/* Battery unplugged */
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{ KE_IGNORE, 0xfff0, { KEY_RESERVED } },
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/* Battery inserted */
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{ KE_IGNORE, 0xfff1, { KEY_RESERVED } },
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/*
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* Detachable keyboard detached / undocked
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* Note SW_TABLET_MODE is already reported through the intel_vbtn
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* driver for this, so we ignore it.
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*/
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{ KE_IGNORE, 0xfff2, { KEY_RESERVED } },
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/* Detachable keyboard attached / docked */
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{ KE_IGNORE, 0xfff3, { KEY_RESERVED } },
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/* Keyboard backlight level changed */
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{ KE_IGNORE, KBD_LED_OFF_TOKEN, { KEY_RESERVED } },
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{ KE_IGNORE, KBD_LED_ON_TOKEN, { KEY_RESERVED } },
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{ KE_IGNORE, KBD_LED_AUTO_TOKEN, { KEY_RESERVED } },
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{ KE_IGNORE, KBD_LED_AUTO_25_TOKEN, { KEY_RESERVED } },
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{ KE_IGNORE, KBD_LED_AUTO_50_TOKEN, { KEY_RESERVED } },
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{ KE_IGNORE, KBD_LED_AUTO_75_TOKEN, { KEY_RESERVED } },
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{ KE_IGNORE, KBD_LED_AUTO_100_TOKEN, { KEY_RESERVED } },
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};
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/*
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* Keymap for WMI events of type 0x0012
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* They are events with extended data
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*/
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static const struct key_entry dell_wmi_keymap_type_0012[] = {
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/* Fn-lock button pressed */
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{ KE_IGNORE, 0xe035, { KEY_RESERVED } },
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};
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static void dell_wmi_process_key(struct wmi_device *wdev, int type, int code)
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{
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struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
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const struct key_entry *key;
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key = sparse_keymap_entry_from_scancode(priv->input_dev,
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(type << 16) | code);
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if (!key) {
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pr_info("Unknown key with type 0x%04x and code 0x%04x pressed\n",
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type, code);
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return;
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}
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pr_debug("Key with type 0x%04x and code 0x%04x pressed\n", type, code);
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/* Don't report brightness notifications that will also come via ACPI */
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if ((key->keycode == KEY_BRIGHTNESSUP ||
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key->keycode == KEY_BRIGHTNESSDOWN) &&
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acpi_video_handles_brightness_key_presses())
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return;
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if (type == 0x0000 && code == 0xe025 && !wmi_requires_smbios_request)
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return;
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if (key->keycode == KEY_KBDILLUMTOGGLE)
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dell_laptop_call_notifier(
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DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED, NULL);
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sparse_keymap_report_entry(priv->input_dev, key, 1, true);
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}
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static void dell_wmi_notify(struct wmi_device *wdev,
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union acpi_object *obj)
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{
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struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
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u16 *buffer_entry, *buffer_end;
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acpi_size buffer_size;
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int len, i;
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if (obj->type != ACPI_TYPE_BUFFER) {
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pr_warn("bad response type %x\n", obj->type);
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return;
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}
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pr_debug("Received WMI event (%*ph)\n",
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obj->buffer.length, obj->buffer.pointer);
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buffer_entry = (u16 *)obj->buffer.pointer;
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buffer_size = obj->buffer.length/2;
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buffer_end = buffer_entry + buffer_size;
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/*
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* BIOS/ACPI on devices with WMI interface version 0 does not clear
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* buffer before filling it. So next time when BIOS/ACPI send WMI event
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* which is smaller as previous then it contains garbage in buffer from
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* previous event.
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*
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* BIOS/ACPI on devices with WMI interface version 1 clears buffer and
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* sometimes send more events in buffer at one call.
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*
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* So to prevent reading garbage from buffer we will process only first
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* one event on devices with WMI interface version 0.
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*/
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if (priv->interface_version == 0 && buffer_entry < buffer_end)
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if (buffer_end > buffer_entry + buffer_entry[0] + 1)
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buffer_end = buffer_entry + buffer_entry[0] + 1;
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while (buffer_entry < buffer_end) {
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len = buffer_entry[0];
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if (len == 0)
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break;
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len++;
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if (buffer_entry + len > buffer_end) {
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pr_warn("Invalid length of WMI event\n");
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break;
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}
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pr_debug("Process buffer (%*ph)\n", len*2, buffer_entry);
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switch (buffer_entry[1]) {
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case 0x0000: /* One key pressed or event occurred */
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case 0x0012: /* Event with extended data occurred */
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if (len > 2)
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dell_wmi_process_key(wdev, buffer_entry[1],
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buffer_entry[2]);
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/* Extended data is currently ignored */
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break;
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case 0x0010: /* Sequence of keys pressed */
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case 0x0011: /* Sequence of events occurred */
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for (i = 2; i < len; ++i)
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dell_wmi_process_key(wdev, buffer_entry[1],
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buffer_entry[i]);
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break;
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default: /* Unknown event */
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pr_info("Unknown WMI event type 0x%x\n",
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(int)buffer_entry[1]);
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break;
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}
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buffer_entry += len;
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}
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}
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static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len)
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{
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int i;
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for (i = 0; i < len; i++)
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if (keymap[i].code == scancode)
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return true;
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return false;
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}
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static void handle_dmi_entry(const struct dmi_header *dm, void *opaque)
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{
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struct dell_dmi_results *results = opaque;
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struct dell_bios_hotkey_table *table;
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int hotkey_num, i, pos = 0;
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struct key_entry *keymap;
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if (results->err || results->keymap)
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return; /* We already found the hotkey table. */
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/* The Dell hotkey table is type 0xB2. Scan until we find it. */
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if (dm->type != 0xb2)
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return;
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table = container_of(dm, struct dell_bios_hotkey_table, header);
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hotkey_num = (table->header.length -
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sizeof(struct dell_bios_hotkey_table)) /
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sizeof(struct dell_bios_keymap_entry);
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if (hotkey_num < 1) {
|
|
/*
|
|
* Historically, dell-wmi would ignore a DMI entry of
|
|
* fewer than 7 bytes. Sizes between 4 and 8 bytes are
|
|
* nonsensical (both the header and all entries are 4
|
|
* bytes), so we approximate the old behavior by
|
|
* ignoring tables with fewer than one entry.
|
|
*/
|
|
return;
|
|
}
|
|
|
|
keymap = kcalloc(hotkey_num, sizeof(struct key_entry), GFP_KERNEL);
|
|
if (!keymap) {
|
|
results->err = -ENOMEM;
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < hotkey_num; i++) {
|
|
const struct dell_bios_keymap_entry *bios_entry =
|
|
&table->keymap[i];
|
|
|
|
/* Uninitialized entries are 0 aka KEY_RESERVED. */
|
|
u16 keycode = (bios_entry->keycode <
|
|
ARRAY_SIZE(bios_to_linux_keycode)) ?
|
|
bios_to_linux_keycode[bios_entry->keycode] :
|
|
(bios_entry->keycode == 0xffff ? KEY_UNKNOWN : KEY_RESERVED);
|
|
|
|
/*
|
|
* Log if we find an entry in the DMI table that we don't
|
|
* understand. If this happens, we should figure out what
|
|
* the entry means and add it to bios_to_linux_keycode.
|
|
*/
|
|
if (keycode == KEY_RESERVED) {
|
|
pr_info("firmware scancode 0x%x maps to unrecognized keycode 0x%x\n",
|
|
bios_entry->scancode, bios_entry->keycode);
|
|
continue;
|
|
}
|
|
|
|
if (keycode == KEY_KBDILLUMTOGGLE)
|
|
keymap[pos].type = KE_IGNORE;
|
|
else
|
|
keymap[pos].type = KE_KEY;
|
|
keymap[pos].code = bios_entry->scancode;
|
|
keymap[pos].keycode = keycode;
|
|
|
|
pos++;
|
|
}
|
|
|
|
results->keymap = keymap;
|
|
results->keymap_size = pos;
|
|
}
|
|
|
|
static int dell_wmi_input_setup(struct wmi_device *wdev)
|
|
{
|
|
struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
|
|
struct dell_dmi_results dmi_results = {};
|
|
struct key_entry *keymap;
|
|
int err, i, pos = 0;
|
|
|
|
priv->input_dev = input_allocate_device();
|
|
if (!priv->input_dev)
|
|
return -ENOMEM;
|
|
|
|
priv->input_dev->name = "Dell WMI hotkeys";
|
|
priv->input_dev->id.bustype = BUS_HOST;
|
|
priv->input_dev->dev.parent = &wdev->dev;
|
|
|
|
if (dmi_walk(handle_dmi_entry, &dmi_results)) {
|
|
/*
|
|
* Historically, dell-wmi ignored dmi_walk errors. A failure
|
|
* is certainly surprising, but it probably just indicates
|
|
* a very old laptop.
|
|
*/
|
|
pr_warn("no DMI; using the old-style hotkey interface\n");
|
|
}
|
|
|
|
if (dmi_results.err) {
|
|
err = dmi_results.err;
|
|
goto err_free_dev;
|
|
}
|
|
|
|
keymap = kcalloc(dmi_results.keymap_size +
|
|
ARRAY_SIZE(dell_wmi_keymap_type_0000) +
|
|
ARRAY_SIZE(dell_wmi_keymap_type_0010) +
|
|
ARRAY_SIZE(dell_wmi_keymap_type_0011) +
|
|
ARRAY_SIZE(dell_wmi_keymap_type_0012) +
|
|
1,
|
|
sizeof(struct key_entry), GFP_KERNEL);
|
|
if (!keymap) {
|
|
kfree(dmi_results.keymap);
|
|
err = -ENOMEM;
|
|
goto err_free_dev;
|
|
}
|
|
|
|
/* Append table with events of type 0x0010 which comes from DMI */
|
|
for (i = 0; i < dmi_results.keymap_size; i++) {
|
|
keymap[pos] = dmi_results.keymap[i];
|
|
keymap[pos].code |= (0x0010 << 16);
|
|
pos++;
|
|
}
|
|
|
|
kfree(dmi_results.keymap);
|
|
|
|
/* Append table with extra events of type 0x0010 which are not in DMI */
|
|
for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0010); i++) {
|
|
const struct key_entry *entry = &dell_wmi_keymap_type_0010[i];
|
|
|
|
/*
|
|
* Check if we've already found this scancode. This takes
|
|
* quadratic time, but it doesn't matter unless the list
|
|
* of extra keys gets very long.
|
|
*/
|
|
if (dmi_results.keymap_size &&
|
|
have_scancode(entry->code | (0x0010 << 16),
|
|
keymap, dmi_results.keymap_size)
|
|
)
|
|
continue;
|
|
|
|
keymap[pos] = *entry;
|
|
keymap[pos].code |= (0x0010 << 16);
|
|
pos++;
|
|
}
|
|
|
|
/* Append table with events of type 0x0011 */
|
|
for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0011); i++) {
|
|
keymap[pos] = dell_wmi_keymap_type_0011[i];
|
|
keymap[pos].code |= (0x0011 << 16);
|
|
pos++;
|
|
}
|
|
|
|
/* Append table with events of type 0x0012 */
|
|
for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0012); i++) {
|
|
keymap[pos] = dell_wmi_keymap_type_0012[i];
|
|
keymap[pos].code |= (0x0012 << 16);
|
|
pos++;
|
|
}
|
|
|
|
/*
|
|
* Now append also table with "legacy" events of type 0x0000. Some of
|
|
* them are reported also on laptops which have scancodes in DMI.
|
|
*/
|
|
for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0000); i++) {
|
|
keymap[pos] = dell_wmi_keymap_type_0000[i];
|
|
pos++;
|
|
}
|
|
|
|
keymap[pos].type = KE_END;
|
|
|
|
err = sparse_keymap_setup(priv->input_dev, keymap, NULL);
|
|
/*
|
|
* Sparse keymap library makes a copy of keymap so we don't need the
|
|
* original one that was allocated.
|
|
*/
|
|
kfree(keymap);
|
|
if (err)
|
|
goto err_free_dev;
|
|
|
|
err = input_register_device(priv->input_dev);
|
|
if (err)
|
|
goto err_free_dev;
|
|
|
|
return 0;
|
|
|
|
err_free_dev:
|
|
input_free_device(priv->input_dev);
|
|
return err;
|
|
}
|
|
|
|
static void dell_wmi_input_destroy(struct wmi_device *wdev)
|
|
{
|
|
struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
|
|
|
|
input_unregister_device(priv->input_dev);
|
|
}
|
|
|
|
/*
|
|
* According to Dell SMBIOS documentation:
|
|
*
|
|
* 17 3 Application Program Registration
|
|
*
|
|
* cbArg1 Application ID 1 = 0x00010000
|
|
* cbArg2 Application ID 2
|
|
* QUICKSET/DCP = 0x51534554 "QSET"
|
|
* ALS Driver = 0x416c7353 "AlsS"
|
|
* Latitude ON = 0x4c6f6e52 "LonR"
|
|
* cbArg3 Application version or revision number
|
|
* cbArg4 0 = Unregister application
|
|
* 1 = Register application
|
|
* cbRes1 Standard return codes (0, -1, -2)
|
|
*/
|
|
|
|
static int dell_wmi_events_set_enabled(bool enable)
|
|
{
|
|
struct calling_interface_buffer *buffer;
|
|
int ret;
|
|
|
|
buffer = kzalloc(sizeof(struct calling_interface_buffer), GFP_KERNEL);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
buffer->cmd_class = CLASS_INFO;
|
|
buffer->cmd_select = SELECT_APP_REGISTRATION;
|
|
buffer->input[0] = 0x10000;
|
|
buffer->input[1] = 0x51534554;
|
|
buffer->input[3] = enable;
|
|
ret = dell_smbios_call(buffer);
|
|
if (ret == 0)
|
|
ret = buffer->output[0];
|
|
kfree(buffer);
|
|
|
|
return dell_smbios_error(ret);
|
|
}
|
|
|
|
static int dell_wmi_probe(struct wmi_device *wdev, const void *context)
|
|
{
|
|
struct dell_wmi_priv *priv;
|
|
int ret;
|
|
|
|
ret = dell_wmi_get_descriptor_valid();
|
|
if (ret)
|
|
return ret;
|
|
|
|
priv = devm_kzalloc(
|
|
&wdev->dev, sizeof(struct dell_wmi_priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
dev_set_drvdata(&wdev->dev, priv);
|
|
|
|
if (!dell_wmi_get_interface_version(&priv->interface_version))
|
|
return -EPROBE_DEFER;
|
|
|
|
return dell_wmi_input_setup(wdev);
|
|
}
|
|
|
|
static int dell_wmi_remove(struct wmi_device *wdev)
|
|
{
|
|
dell_wmi_input_destroy(wdev);
|
|
return 0;
|
|
}
|
|
static const struct wmi_device_id dell_wmi_id_table[] = {
|
|
{ .guid_string = DELL_EVENT_GUID },
|
|
{ },
|
|
};
|
|
|
|
static struct wmi_driver dell_wmi_driver = {
|
|
.driver = {
|
|
.name = "dell-wmi",
|
|
},
|
|
.id_table = dell_wmi_id_table,
|
|
.probe = dell_wmi_probe,
|
|
.remove = dell_wmi_remove,
|
|
.notify = dell_wmi_notify,
|
|
};
|
|
|
|
static int __init dell_wmi_init(void)
|
|
{
|
|
int err;
|
|
|
|
dmi_check_system(dell_wmi_smbios_list);
|
|
|
|
if (wmi_requires_smbios_request) {
|
|
err = dell_wmi_events_set_enabled(true);
|
|
if (err) {
|
|
pr_err("Failed to enable WMI events\n");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return wmi_driver_register(&dell_wmi_driver);
|
|
}
|
|
late_initcall(dell_wmi_init);
|
|
|
|
static void __exit dell_wmi_exit(void)
|
|
{
|
|
if (wmi_requires_smbios_request)
|
|
dell_wmi_events_set_enabled(false);
|
|
|
|
wmi_driver_unregister(&dell_wmi_driver);
|
|
}
|
|
module_exit(dell_wmi_exit);
|
|
|
|
MODULE_DEVICE_TABLE(wmi, dell_wmi_id_table);
|