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763 lines
20 KiB
763 lines
20 KiB
// 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 <[email protected]> |
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* Copyright (C) 2014-2015 Pali Rohár <[email protected]> |
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* |
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* Portions based on wistron_btns.c: |
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* Copyright (C) 2005 Miloslav Trmac <[email protected]> |
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* Copyright (C) 2005 Bernhard Rosenkraenzer <[email protected]> |
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* Copyright (C) 2005 Dmitry Torokhov <[email protected]> |
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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/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 <[email protected]>"); |
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MODULE_AUTHOR("Pali Rohár <[email protected]>"); |
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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) { |
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/* |
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* Historically, dell-wmi would ignore a DMI entry of |
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* fewer than 7 bytes. Sizes between 4 and 8 bytes are |
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* nonsensical (both the header and all entries are 4 |
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* bytes), so we approximate the old behavior by |
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* ignoring tables with fewer than one entry. |
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*/ |
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return; |
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} |
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keymap = kcalloc(hotkey_num, sizeof(struct key_entry), GFP_KERNEL); |
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if (!keymap) { |
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results->err = -ENOMEM; |
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return; |
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} |
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for (i = 0; i < hotkey_num; i++) { |
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const struct dell_bios_keymap_entry *bios_entry = |
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&table->keymap[i]; |
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/* Uninitialized entries are 0 aka KEY_RESERVED. */ |
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u16 keycode = (bios_entry->keycode < |
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ARRAY_SIZE(bios_to_linux_keycode)) ? |
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bios_to_linux_keycode[bios_entry->keycode] : |
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(bios_entry->keycode == 0xffff ? KEY_UNKNOWN : KEY_RESERVED); |
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|
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/* |
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* Log if we find an entry in the DMI table that we don't |
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* understand. If this happens, we should figure out what |
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* the entry means and add it to bios_to_linux_keycode. |
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*/ |
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if (keycode == KEY_RESERVED) { |
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pr_info("firmware scancode 0x%x maps to unrecognized keycode 0x%x\n", |
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bios_entry->scancode, bios_entry->keycode); |
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continue; |
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} |
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if (keycode == KEY_KBDILLUMTOGGLE) |
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keymap[pos].type = KE_IGNORE; |
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else |
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keymap[pos].type = KE_KEY; |
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keymap[pos].code = bios_entry->scancode; |
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keymap[pos].keycode = keycode; |
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|
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pos++; |
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} |
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|
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results->keymap = keymap; |
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results->keymap_size = pos; |
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} |
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|
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static int dell_wmi_input_setup(struct wmi_device *wdev) |
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{ |
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struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev); |
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struct dell_dmi_results dmi_results = {}; |
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struct key_entry *keymap; |
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int err, i, pos = 0; |
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|
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priv->input_dev = input_allocate_device(); |
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if (!priv->input_dev) |
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return -ENOMEM; |
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|
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priv->input_dev->name = "Dell WMI hotkeys"; |
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priv->input_dev->id.bustype = BUS_HOST; |
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priv->input_dev->dev.parent = &wdev->dev; |
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|
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if (dmi_walk(handle_dmi_entry, &dmi_results)) { |
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/* |
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* Historically, dell-wmi ignored dmi_walk errors. A failure |
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* is certainly surprising, but it probably just indicates |
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* a very old laptop. |
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*/ |
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pr_warn("no DMI; using the old-style hotkey interface\n"); |
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} |
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|
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if (dmi_results.err) { |
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err = dmi_results.err; |
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goto err_free_dev; |
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} |
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|
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keymap = kcalloc(dmi_results.keymap_size + |
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ARRAY_SIZE(dell_wmi_keymap_type_0000) + |
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ARRAY_SIZE(dell_wmi_keymap_type_0010) + |
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ARRAY_SIZE(dell_wmi_keymap_type_0011) + |
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ARRAY_SIZE(dell_wmi_keymap_type_0012) + |
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1, |
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sizeof(struct key_entry), GFP_KERNEL); |
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if (!keymap) { |
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kfree(dmi_results.keymap); |
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err = -ENOMEM; |
|
goto err_free_dev; |
|
} |
|
|
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/* Append table with events of type 0x0010 which comes from DMI */ |
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for (i = 0; i < dmi_results.keymap_size; i++) { |
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keymap[pos] = dmi_results.keymap[i]; |
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keymap[pos].code |= (0x0010 << 16); |
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pos++; |
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} |
|
|
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kfree(dmi_results.keymap); |
|
|
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/* Append table with extra events of type 0x0010 which are not in DMI */ |
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for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0010); i++) { |
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const struct key_entry *entry = &dell_wmi_keymap_type_0010[i]; |
|
|
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/* |
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* Check if we've already found this scancode. This takes |
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* quadratic time, but it doesn't matter unless the list |
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* of extra keys gets very long. |
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*/ |
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if (dmi_results.keymap_size && |
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have_scancode(entry->code | (0x0010 << 16), |
|
keymap, dmi_results.keymap_size) |
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) |
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continue; |
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|
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keymap[pos] = *entry; |
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keymap[pos].code |= (0x0010 << 16); |
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pos++; |
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} |
|
|
|
/* Append table with events of type 0x0011 */ |
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for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0011); i++) { |
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keymap[pos] = dell_wmi_keymap_type_0011[i]; |
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keymap[pos].code |= (0x0011 << 16); |
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pos++; |
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} |
|
|
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/* Append table with events of type 0x0012 */ |
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for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0012); i++) { |
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keymap[pos] = dell_wmi_keymap_type_0012[i]; |
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keymap[pos].code |= (0x0012 << 16); |
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pos++; |
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} |
|
|
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/* |
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* Now append also table with "legacy" events of type 0x0000. Some of |
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* them are reported also on laptops which have scancodes in DMI. |
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*/ |
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for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0000); i++) { |
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keymap[pos] = dell_wmi_keymap_type_0000[i]; |
|
pos++; |
|
} |
|
|
|
keymap[pos].type = KE_END; |
|
|
|
err = sparse_keymap_setup(priv->input_dev, keymap, NULL); |
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/* |
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* 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 void dell_wmi_remove(struct wmi_device *wdev) |
|
{ |
|
dell_wmi_input_destroy(wdev); |
|
} |
|
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);
|
|
|