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// SPDX-License-Identifier: GPL-2.0+
/*
* lg-laptop.c - LG Gram ACPI features and hotkeys Driver
*
* Copyright (C) 2018 Matan Ziv-Av <matan@svgalib.org>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/acpi.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/types.h>
#define LED_DEVICE(_name, max) struct led_classdev _name = { \
.name = __stringify(_name), \
.max_brightness = max, \
.brightness_set = _name##_set, \
.brightness_get = _name##_get, \
}
MODULE_AUTHOR("Matan Ziv-Av");
MODULE_DESCRIPTION("LG WMI Hotkey Driver");
MODULE_LICENSE("GPL");
#define WMI_EVENT_GUID0 "E4FB94F9-7F2B-4173-AD1A-CD1D95086248"
#define WMI_EVENT_GUID1 "023B133E-49D1-4E10-B313-698220140DC2"
#define WMI_EVENT_GUID2 "37BE1AC0-C3F2-4B1F-BFBE-8FDEAF2814D6"
#define WMI_EVENT_GUID3 "911BAD44-7DF8-4FBB-9319-BABA1C4B293B"
#define WMI_METHOD_WMAB "C3A72B38-D3EF-42D3-8CBB-D5A57049F66D"
#define WMI_METHOD_WMBB "2B4F501A-BD3C-4394-8DCF-00A7D2BC8210"
#define WMI_EVENT_GUID WMI_EVENT_GUID0
#define WMAB_METHOD "\\XINI.WMAB"
#define WMBB_METHOD "\\XINI.WMBB"
#define SB_GGOV_METHOD "\\_SB.GGOV"
#define GOV_TLED 0x2020008
#define WM_GET 1
#define WM_SET 2
#define WM_KEY_LIGHT 0x400
#define WM_TLED 0x404
#define WM_FN_LOCK 0x407
#define WM_BATT_LIMIT 0x61
#define WM_READER_MODE 0xBF
#define WM_FAN_MODE 0x33
#define WMBB_USB_CHARGE 0x10B
#define WMBB_BATT_LIMIT 0x10C
#define PLATFORM_NAME "lg-laptop"
MODULE_ALIAS("wmi:" WMI_EVENT_GUID0);
MODULE_ALIAS("wmi:" WMI_EVENT_GUID1);
MODULE_ALIAS("wmi:" WMI_EVENT_GUID2);
MODULE_ALIAS("wmi:" WMI_EVENT_GUID3);
MODULE_ALIAS("wmi:" WMI_METHOD_WMAB);
MODULE_ALIAS("wmi:" WMI_METHOD_WMBB);
MODULE_ALIAS("acpi*:LGEX0815:*");
static struct platform_device *pf_device;
static struct input_dev *wmi_input_dev;
static u32 inited;
#define INIT_INPUT_WMI_0 0x01
#define INIT_INPUT_WMI_2 0x02
#define INIT_INPUT_ACPI 0x04
#define INIT_SPARSE_KEYMAP 0x80
static const struct key_entry wmi_keymap[] = {
{KE_KEY, 0x70, {KEY_F15} }, /* LG control panel (F1) */
{KE_KEY, 0x74, {KEY_F13} }, /* Touchpad toggle (F5) */
{KE_KEY, 0xf020000, {KEY_F14} }, /* Read mode (F9) */
{KE_KEY, 0x10000000, {KEY_F16} },/* Keyboard backlight (F8) - pressing
* this key both sends an event and
* changes backlight level.
*/
{KE_KEY, 0x80, {KEY_RFKILL} },
{KE_END, 0}
};
static int ggov(u32 arg0)
{
union acpi_object args[1];
union acpi_object *r;
acpi_status status;
acpi_handle handle;
struct acpi_object_list arg;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
int res;
args[0].type = ACPI_TYPE_INTEGER;
args[0].integer.value = arg0;
status = acpi_get_handle(NULL, (acpi_string) SB_GGOV_METHOD, &handle);
if (ACPI_FAILURE(status)) {
pr_err("Cannot get handle");
return -ENODEV;
}
arg.count = 1;
arg.pointer = args;
status = acpi_evaluate_object(handle, NULL, &arg, &buffer);
if (ACPI_FAILURE(status)) {
acpi_handle_err(handle, "GGOV: call failed.\n");
return -EINVAL;
}
r = buffer.pointer;
if (r->type != ACPI_TYPE_INTEGER) {
kfree(r);
return -EINVAL;
}
res = r->integer.value;
kfree(r);
return res;
}
static union acpi_object *lg_wmab(u32 method, u32 arg1, u32 arg2)
{
union acpi_object args[3];
acpi_status status;
acpi_handle handle;
struct acpi_object_list arg;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
args[0].type = ACPI_TYPE_INTEGER;
args[0].integer.value = method;
args[1].type = ACPI_TYPE_INTEGER;
args[1].integer.value = arg1;
args[2].type = ACPI_TYPE_INTEGER;
args[2].integer.value = arg2;
status = acpi_get_handle(NULL, (acpi_string) WMAB_METHOD, &handle);
if (ACPI_FAILURE(status)) {
pr_err("Cannot get handle");
return NULL;
}
arg.count = 3;
arg.pointer = args;
status = acpi_evaluate_object(handle, NULL, &arg, &buffer);
if (ACPI_FAILURE(status)) {
acpi_handle_err(handle, "WMAB: call failed.\n");
return NULL;
}
return buffer.pointer;
}
static union acpi_object *lg_wmbb(u32 method_id, u32 arg1, u32 arg2)
{
union acpi_object args[3];
acpi_status status;
acpi_handle handle;
struct acpi_object_list arg;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
u8 buf[32];
*(u32 *)buf = method_id;
*(u32 *)(buf + 4) = arg1;
*(u32 *)(buf + 16) = arg2;
args[0].type = ACPI_TYPE_INTEGER;
args[0].integer.value = 0; /* ignored */
args[1].type = ACPI_TYPE_INTEGER;
args[1].integer.value = 1; /* Must be 1 or 2. Does not matter which */
args[2].type = ACPI_TYPE_BUFFER;
args[2].buffer.length = 32;
args[2].buffer.pointer = buf;
status = acpi_get_handle(NULL, (acpi_string)WMBB_METHOD, &handle);
if (ACPI_FAILURE(status)) {
pr_err("Cannot get handle");
return NULL;
}
arg.count = 3;
arg.pointer = args;
status = acpi_evaluate_object(handle, NULL, &arg, &buffer);
if (ACPI_FAILURE(status)) {
acpi_handle_err(handle, "WMAB: call failed.\n");
return NULL;
}
return (union acpi_object *)buffer.pointer;
}
static void wmi_notify(u32 value, void *context)
{
struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
acpi_status status;
long data = (long)context;
pr_debug("event guid %li\n", data);
status = wmi_get_event_data(value, &response);
if (ACPI_FAILURE(status)) {
pr_err("Bad event status 0x%x\n", status);
return;
}
obj = (union acpi_object *)response.pointer;
if
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