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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
345 lines
8.5 KiB
C
345 lines
8.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* MSI WMI hotkeys
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*
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* Copyright (C) 2009 Novell <trenn@suse.de>
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*
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* Most stuff taken over from hp-wmi
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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/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/backlight.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <acpi/video.h>
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MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>");
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MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver");
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MODULE_LICENSE("GPL");
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#define DRV_NAME "msi-wmi"
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#define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45"
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#define MSIWMI_MSI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"
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#define MSIWMI_WIND_EVENT_GUID "5B3CC38A-40D9-7245-8AE6-1145B751BE3F"
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MODULE_ALIAS("wmi:" MSIWMI_BIOS_GUID);
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MODULE_ALIAS("wmi:" MSIWMI_MSI_EVENT_GUID);
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MODULE_ALIAS("wmi:" MSIWMI_WIND_EVENT_GUID);
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enum msi_scancodes {
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/* Generic MSI keys (not present on MSI Wind) */
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MSI_KEY_BRIGHTNESSUP = 0xD0,
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MSI_KEY_BRIGHTNESSDOWN,
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MSI_KEY_VOLUMEUP,
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MSI_KEY_VOLUMEDOWN,
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MSI_KEY_MUTE,
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/* MSI Wind keys */
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WIND_KEY_TOUCHPAD = 0x08, /* Fn+F3 touchpad toggle */
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WIND_KEY_BLUETOOTH = 0x56, /* Fn+F11 Bluetooth toggle */
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WIND_KEY_CAMERA, /* Fn+F6 webcam toggle */
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WIND_KEY_WLAN = 0x5f, /* Fn+F11 Wi-Fi toggle */
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WIND_KEY_TURBO, /* Fn+F10 turbo mode toggle */
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WIND_KEY_ECO = 0x69, /* Fn+F10 ECO mode toggle */
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};
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static struct key_entry msi_wmi_keymap[] = {
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{ KE_KEY, MSI_KEY_BRIGHTNESSUP, {KEY_BRIGHTNESSUP} },
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{ KE_KEY, MSI_KEY_BRIGHTNESSDOWN, {KEY_BRIGHTNESSDOWN} },
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{ KE_KEY, MSI_KEY_VOLUMEUP, {KEY_VOLUMEUP} },
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{ KE_KEY, MSI_KEY_VOLUMEDOWN, {KEY_VOLUMEDOWN} },
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{ KE_KEY, MSI_KEY_MUTE, {KEY_MUTE} },
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/* These keys work without WMI. Ignore them to avoid double keycodes */
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{ KE_IGNORE, WIND_KEY_TOUCHPAD, {KEY_TOUCHPAD_TOGGLE} },
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{ KE_IGNORE, WIND_KEY_BLUETOOTH, {KEY_BLUETOOTH} },
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{ KE_IGNORE, WIND_KEY_CAMERA, {KEY_CAMERA} },
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{ KE_IGNORE, WIND_KEY_WLAN, {KEY_WLAN} },
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/* These are unknown WMI events found on MSI Wind */
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{ KE_IGNORE, 0x00 },
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{ KE_IGNORE, 0x62 },
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{ KE_IGNORE, 0x63 },
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/* These are MSI Wind keys that should be handled via WMI */
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{ KE_KEY, WIND_KEY_TURBO, {KEY_PROG1} },
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{ KE_KEY, WIND_KEY_ECO, {KEY_PROG2} },
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{ KE_END, 0 }
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};
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static ktime_t last_pressed;
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static const struct {
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const char *guid;
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bool quirk_last_pressed;
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} *event_wmi, event_wmis[] = {
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{ MSIWMI_MSI_EVENT_GUID, true },
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{ MSIWMI_WIND_EVENT_GUID, false },
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};
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static struct backlight_device *backlight;
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static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF };
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static struct input_dev *msi_wmi_input_dev;
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static int msi_wmi_query_block(int instance, int *ret)
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{
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acpi_status status;
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union acpi_object *obj;
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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status = wmi_query_block(MSIWMI_BIOS_GUID, instance, &output);
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obj = output.pointer;
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if (!obj || obj->type != ACPI_TYPE_INTEGER) {
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if (obj) {
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pr_err("query block returned object "
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"type: %d - buffer length:%d\n", obj->type,
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obj->type == ACPI_TYPE_BUFFER ?
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obj->buffer.length : 0);
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}
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kfree(obj);
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return -EINVAL;
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}
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*ret = obj->integer.value;
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kfree(obj);
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return 0;
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}
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static int msi_wmi_set_block(int instance, int value)
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{
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acpi_status status;
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struct acpi_buffer input = { sizeof(int), &value };
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pr_debug("Going to set block of instance: %d - value: %d\n",
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instance, value);
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status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input);
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return ACPI_SUCCESS(status) ? 0 : 1;
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}
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static int bl_get(struct backlight_device *bd)
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{
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int level, err, ret;
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/* Instance 1 is "get backlight", cmp with DSDT */
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err = msi_wmi_query_block(1, &ret);
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if (err) {
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pr_err("Could not query backlight: %d\n", err);
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return -EINVAL;
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}
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pr_debug("Get: Query block returned: %d\n", ret);
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for (level = 0; level < ARRAY_SIZE(backlight_map); level++) {
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if (backlight_map[level] == ret) {
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pr_debug("Current backlight level: 0x%X - index: %d\n",
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backlight_map[level], level);
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break;
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}
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}
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if (level == ARRAY_SIZE(backlight_map)) {
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pr_err("get: Invalid brightness value: 0x%X\n", ret);
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return -EINVAL;
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}
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return level;
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}
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static int bl_set_status(struct backlight_device *bd)
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{
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int bright = bd->props.brightness;
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if (bright >= ARRAY_SIZE(backlight_map) || bright < 0)
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return -EINVAL;
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/* Instance 0 is "set backlight" */
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return msi_wmi_set_block(0, backlight_map[bright]);
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}
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static const struct backlight_ops msi_backlight_ops = {
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.get_brightness = bl_get,
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.update_status = bl_set_status,
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};
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static void msi_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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struct key_entry *key;
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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 (status != AE_OK) {
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pr_info("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 && obj->type == ACPI_TYPE_INTEGER) {
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int eventcode = obj->integer.value;
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pr_debug("Eventcode: 0x%x\n", eventcode);
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key = sparse_keymap_entry_from_scancode(msi_wmi_input_dev,
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eventcode);
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if (!key) {
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pr_info("Unknown key pressed - %x\n", eventcode);
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goto msi_wmi_notify_exit;
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}
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if (event_wmi->quirk_last_pressed) {
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ktime_t cur = ktime_get_real();
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ktime_t diff = ktime_sub(cur, last_pressed);
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/* Ignore event if any event happened in a 50 ms
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timeframe -> Key press may result in 10-20 GPEs */
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if (ktime_to_us(diff) < 1000 * 50) {
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pr_debug("Suppressed key event 0x%X - "
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"Last press was %lld us ago\n",
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key->code, ktime_to_us(diff));
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goto msi_wmi_notify_exit;
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}
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last_pressed = cur;
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}
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if (key->type == KE_KEY &&
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/* Brightness is served via acpi video driver */
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(backlight ||
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(key->code != MSI_KEY_BRIGHTNESSUP &&
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key->code != MSI_KEY_BRIGHTNESSDOWN))) {
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pr_debug("Send key: 0x%X - Input layer keycode: %d\n",
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key->code, key->keycode);
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sparse_keymap_report_entry(msi_wmi_input_dev, key, 1,
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true);
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}
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} else
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pr_info("Unknown event received\n");
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msi_wmi_notify_exit:
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kfree(response.pointer);
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}
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static int __init msi_wmi_backlight_setup(void)
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{
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int err;
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struct backlight_properties props;
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memset(&props, 0, sizeof(struct backlight_properties));
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props.type = BACKLIGHT_PLATFORM;
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props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
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backlight = backlight_device_register(DRV_NAME, NULL, NULL,
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&msi_backlight_ops,
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&props);
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if (IS_ERR(backlight))
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return PTR_ERR(backlight);
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err = bl_get(NULL);
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if (err < 0) {
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backlight_device_unregister(backlight);
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return err;
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}
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backlight->props.brightness = err;
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return 0;
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}
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static int __init msi_wmi_input_setup(void)
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{
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int err;
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msi_wmi_input_dev = input_allocate_device();
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if (!msi_wmi_input_dev)
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return -ENOMEM;
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msi_wmi_input_dev->name = "MSI WMI hotkeys";
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msi_wmi_input_dev->phys = "wmi/input0";
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msi_wmi_input_dev->id.bustype = BUS_HOST;
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err = sparse_keymap_setup(msi_wmi_input_dev, msi_wmi_keymap, NULL);
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if (err)
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goto err_free_dev;
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err = input_register_device(msi_wmi_input_dev);
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if (err)
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goto err_free_dev;
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last_pressed = 0;
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return 0;
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err_free_dev:
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input_free_device(msi_wmi_input_dev);
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return err;
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}
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static int __init msi_wmi_init(void)
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{
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int err;
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int i;
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for (i = 0; i < ARRAY_SIZE(event_wmis); i++) {
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if (!wmi_has_guid(event_wmis[i].guid))
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continue;
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err = msi_wmi_input_setup();
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if (err) {
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pr_err("Unable to setup input device\n");
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return err;
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}
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err = wmi_install_notify_handler(event_wmis[i].guid,
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msi_wmi_notify, NULL);
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if (ACPI_FAILURE(err)) {
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pr_err("Unable to setup WMI notify handler\n");
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goto err_free_input;
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}
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pr_debug("Event handler installed\n");
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event_wmi = &event_wmis[i];
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break;
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}
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if (wmi_has_guid(MSIWMI_BIOS_GUID) &&
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acpi_video_get_backlight_type() == acpi_backlight_vendor) {
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err = msi_wmi_backlight_setup();
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if (err) {
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pr_err("Unable to setup backlight device\n");
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goto err_uninstall_handler;
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}
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pr_debug("Backlight device created\n");
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}
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if (!event_wmi && !backlight) {
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pr_err("This machine doesn't have neither MSI-hotkeys nor backlight through WMI\n");
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return -ENODEV;
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}
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return 0;
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err_uninstall_handler:
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if (event_wmi)
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wmi_remove_notify_handler(event_wmi->guid);
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err_free_input:
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if (event_wmi)
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input_unregister_device(msi_wmi_input_dev);
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return err;
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}
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static void __exit msi_wmi_exit(void)
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{
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if (event_wmi) {
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wmi_remove_notify_handler(event_wmi->guid);
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input_unregister_device(msi_wmi_input_dev);
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}
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backlight_device_unregister(backlight);
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}
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module_init(msi_wmi_init);
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module_exit(msi_wmi_exit);
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