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347 lines
8.5 KiB
347 lines
8.5 KiB
// 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 <[email protected]> |
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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 <[email protected]>"); |
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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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if (ACPI_FAILURE(status)) |
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return -EIO; |
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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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