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![Andy Shevchenko](/assets/img/avatar_default.png)
led_classdev_unregister() already has the similar check, so, drop a duplicate in the driver. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
694 lines
15 KiB
C
694 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* lg-laptop.c - LG Gram ACPI features and hotkeys Driver
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*
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* Copyright (C) 2018 Matan Ziv-Av <matan@svgalib.org>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/acpi.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/kernel.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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#define LED_DEVICE(_name, max) struct led_classdev _name = { \
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.name = __stringify(_name), \
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.max_brightness = max, \
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.brightness_set = _name##_set, \
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.brightness_get = _name##_get, \
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}
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MODULE_AUTHOR("Matan Ziv-Av");
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MODULE_DESCRIPTION("LG WMI Hotkey Driver");
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MODULE_LICENSE("GPL");
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#define WMI_EVENT_GUID0 "E4FB94F9-7F2B-4173-AD1A-CD1D95086248"
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#define WMI_EVENT_GUID1 "023B133E-49D1-4E10-B313-698220140DC2"
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#define WMI_EVENT_GUID2 "37BE1AC0-C3F2-4B1F-BFBE-8FDEAF2814D6"
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#define WMI_EVENT_GUID3 "911BAD44-7DF8-4FBB-9319-BABA1C4B293B"
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#define WMI_METHOD_WMAB "C3A72B38-D3EF-42D3-8CBB-D5A57049F66D"
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#define WMI_METHOD_WMBB "2B4F501A-BD3C-4394-8DCF-00A7D2BC8210"
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#define WMI_EVENT_GUID WMI_EVENT_GUID0
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#define WMAB_METHOD "\\XINI.WMAB"
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#define WMBB_METHOD "\\XINI.WMBB"
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#define SB_GGOV_METHOD "\\_SB.GGOV"
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#define GOV_TLED 0x2020008
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#define WM_GET 1
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#define WM_SET 2
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#define WM_KEY_LIGHT 0x400
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#define WM_TLED 0x404
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#define WM_FN_LOCK 0x407
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#define WM_BATT_LIMIT 0x61
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#define WM_READER_MODE 0xBF
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#define WM_FAN_MODE 0x33
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#define WMBB_USB_CHARGE 0x10B
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#define WMBB_BATT_LIMIT 0x10C
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#define PLATFORM_NAME "lg-laptop"
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MODULE_ALIAS("wmi:" WMI_EVENT_GUID0);
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MODULE_ALIAS("wmi:" WMI_EVENT_GUID1);
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MODULE_ALIAS("wmi:" WMI_EVENT_GUID2);
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MODULE_ALIAS("wmi:" WMI_EVENT_GUID3);
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MODULE_ALIAS("wmi:" WMI_METHOD_WMAB);
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MODULE_ALIAS("wmi:" WMI_METHOD_WMBB);
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MODULE_ALIAS("acpi*:LGEX0815:*");
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static struct platform_device *pf_device;
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static struct input_dev *wmi_input_dev;
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static u32 inited;
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#define INIT_INPUT_WMI_0 0x01
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#define INIT_INPUT_WMI_2 0x02
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#define INIT_INPUT_ACPI 0x04
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#define INIT_SPARSE_KEYMAP 0x80
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static const struct key_entry wmi_keymap[] = {
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{KE_KEY, 0x70, {KEY_F15} }, /* LG control panel (F1) */
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{KE_KEY, 0x74, {KEY_F13} }, /* Touchpad toggle (F5) */
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{KE_KEY, 0xf020000, {KEY_F14} }, /* Read mode (F9) */
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{KE_KEY, 0x10000000, {KEY_F16} },/* Keyboard backlight (F8) - pressing
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* this key both sends an event and
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* changes backlight level.
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*/
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{KE_KEY, 0x80, {KEY_RFKILL} },
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{KE_END, 0}
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};
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static int ggov(u32 arg0)
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{
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union acpi_object args[1];
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union acpi_object *r;
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acpi_status status;
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acpi_handle handle;
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struct acpi_object_list arg;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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int res;
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args[0].type = ACPI_TYPE_INTEGER;
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args[0].integer.value = arg0;
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status = acpi_get_handle(NULL, (acpi_string) SB_GGOV_METHOD, &handle);
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if (ACPI_FAILURE(status)) {
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pr_err("Cannot get handle");
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return -ENODEV;
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}
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arg.count = 1;
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arg.pointer = args;
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status = acpi_evaluate_object(handle, NULL, &arg, &buffer);
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if (ACPI_FAILURE(status)) {
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acpi_handle_err(handle, "GGOV: call failed.\n");
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return -EINVAL;
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}
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r = buffer.pointer;
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if (r->type != ACPI_TYPE_INTEGER) {
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kfree(r);
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return -EINVAL;
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}
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res = r->integer.value;
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kfree(r);
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return res;
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}
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static union acpi_object *lg_wmab(u32 method, u32 arg1, u32 arg2)
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{
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union acpi_object args[3];
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acpi_status status;
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acpi_handle handle;
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struct acpi_object_list arg;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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args[0].type = ACPI_TYPE_INTEGER;
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args[0].integer.value = method;
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args[1].type = ACPI_TYPE_INTEGER;
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args[1].integer.value = arg1;
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args[2].type = ACPI_TYPE_INTEGER;
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args[2].integer.value = arg2;
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status = acpi_get_handle(NULL, (acpi_string) WMAB_METHOD, &handle);
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if (ACPI_FAILURE(status)) {
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pr_err("Cannot get handle");
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return NULL;
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}
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arg.count = 3;
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arg.pointer = args;
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status = acpi_evaluate_object(handle, NULL, &arg, &buffer);
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if (ACPI_FAILURE(status)) {
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acpi_handle_err(handle, "WMAB: call failed.\n");
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return NULL;
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}
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return buffer.pointer;
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}
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static union acpi_object *lg_wmbb(u32 method_id, u32 arg1, u32 arg2)
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{
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union acpi_object args[3];
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acpi_status status;
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acpi_handle handle;
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struct acpi_object_list arg;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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u8 buf[32];
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*(u32 *)buf = method_id;
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*(u32 *)(buf + 4) = arg1;
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*(u32 *)(buf + 16) = arg2;
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args[0].type = ACPI_TYPE_INTEGER;
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args[0].integer.value = 0; /* ignored */
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args[1].type = ACPI_TYPE_INTEGER;
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args[1].integer.value = 1; /* Must be 1 or 2. Does not matter which */
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args[2].type = ACPI_TYPE_BUFFER;
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args[2].buffer.length = 32;
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args[2].buffer.pointer = buf;
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status = acpi_get_handle(NULL, (acpi_string)WMBB_METHOD, &handle);
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if (ACPI_FAILURE(status)) {
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pr_err("Cannot get handle");
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return NULL;
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}
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arg.count = 3;
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arg.pointer = args;
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status = acpi_evaluate_object(handle, NULL, &arg, &buffer);
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if (ACPI_FAILURE(status)) {
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acpi_handle_err(handle, "WMAB: call failed.\n");
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return NULL;
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}
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return (union acpi_object *)buffer.pointer;
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}
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static void 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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union acpi_object *obj;
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acpi_status status;
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long data = (long)context;
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pr_debug("event guid %li\n", data);
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status = wmi_get_event_data(value, &response);
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if (ACPI_FAILURE(status)) {
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pr_err("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)
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return;
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if (obj->type == ACPI_TYPE_INTEGER) {
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int eventcode = obj->integer.value;
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struct key_entry *key;
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key =
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sparse_keymap_entry_from_scancode(wmi_input_dev, eventcode);
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if (key && key->type == KE_KEY)
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sparse_keymap_report_entry(wmi_input_dev, key, 1, true);
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}
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pr_debug("Type: %i Eventcode: 0x%llx\n", obj->type,
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obj->integer.value);
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kfree(response.pointer);
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}
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static void wmi_input_setup(void)
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{
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acpi_status status;
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wmi_input_dev = input_allocate_device();
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if (wmi_input_dev) {
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wmi_input_dev->name = "LG WMI hotkeys";
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wmi_input_dev->phys = "wmi/input0";
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wmi_input_dev->id.bustype = BUS_HOST;
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if (sparse_keymap_setup(wmi_input_dev, wmi_keymap, NULL) ||
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input_register_device(wmi_input_dev)) {
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pr_info("Cannot initialize input device");
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input_free_device(wmi_input_dev);
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return;
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}
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inited |= INIT_SPARSE_KEYMAP;
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status = wmi_install_notify_handler(WMI_EVENT_GUID0, wmi_notify,
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(void *)0);
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if (ACPI_SUCCESS(status))
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inited |= INIT_INPUT_WMI_0;
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status = wmi_install_notify_handler(WMI_EVENT_GUID2, wmi_notify,
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(void *)2);
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if (ACPI_SUCCESS(status))
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inited |= INIT_INPUT_WMI_2;
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} else {
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pr_info("Cannot allocate input device");
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}
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}
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static void acpi_notify(struct acpi_device *device, u32 event)
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{
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struct key_entry *key;
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acpi_handle_debug(device->handle, "notify: %d\n", event);
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if (inited & INIT_SPARSE_KEYMAP) {
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key = sparse_keymap_entry_from_scancode(wmi_input_dev, 0x80);
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if (key && key->type == KE_KEY)
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sparse_keymap_report_entry(wmi_input_dev, key, 1, true);
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}
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}
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static ssize_t fan_mode_store(struct device *dev,
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struct device_attribute *attr,
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const char *buffer, size_t count)
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{
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bool value;
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union acpi_object *r;
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u32 m;
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int ret;
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ret = kstrtobool(buffer, &value);
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if (ret)
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return ret;
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r = lg_wmab(WM_FAN_MODE, WM_GET, 0);
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if (!r)
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return -EIO;
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if (r->type != ACPI_TYPE_INTEGER) {
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kfree(r);
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return -EIO;
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}
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m = r->integer.value;
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kfree(r);
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r = lg_wmab(WM_FAN_MODE, WM_SET, (m & 0xffffff0f) | (value << 4));
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kfree(r);
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r = lg_wmab(WM_FAN_MODE, WM_SET, (m & 0xfffffff0) | value);
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kfree(r);
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return count;
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}
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static ssize_t fan_mode_show(struct device *dev,
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struct device_attribute *attr, char *buffer)
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{
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unsigned int status;
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union acpi_object *r;
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r = lg_wmab(WM_FAN_MODE, WM_GET, 0);
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if (!r)
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return -EIO;
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if (r->type != ACPI_TYPE_INTEGER) {
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kfree(r);
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return -EIO;
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}
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status = r->integer.value & 0x01;
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kfree(r);
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return snprintf(buffer, PAGE_SIZE, "%d\n", status);
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}
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static ssize_t usb_charge_store(struct device *dev,
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struct device_attribute *attr,
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const char *buffer, size_t count)
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{
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bool value;
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union acpi_object *r;
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int ret;
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ret = kstrtobool(buffer, &value);
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if (ret)
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return ret;
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r = lg_wmbb(WMBB_USB_CHARGE, WM_SET, value);
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if (!r)
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return -EIO;
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kfree(r);
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return count;
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}
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static ssize_t usb_charge_show(struct device *dev,
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struct device_attribute *attr, char *buffer)
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{
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unsigned int status;
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union acpi_object *r;
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r = lg_wmbb(WMBB_USB_CHARGE, WM_GET, 0);
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if (!r)
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return -EIO;
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if (r->type != ACPI_TYPE_BUFFER) {
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kfree(r);
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return -EIO;
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}
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status = !!r->buffer.pointer[0x10];
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kfree(r);
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return snprintf(buffer, PAGE_SIZE, "%d\n", status);
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}
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static ssize_t reader_mode_store(struct device *dev,
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struct device_attribute *attr,
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const char *buffer, size_t count)
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{
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bool value;
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union acpi_object *r;
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int ret;
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ret = kstrtobool(buffer, &value);
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if (ret)
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return ret;
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r = lg_wmab(WM_READER_MODE, WM_SET, value);
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if (!r)
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return -EIO;
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kfree(r);
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return count;
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}
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static ssize_t reader_mode_show(struct device *dev,
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struct device_attribute *attr, char *buffer)
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{
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unsigned int status;
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union acpi_object *r;
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r = lg_wmab(WM_READER_MODE, WM_GET, 0);
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if (!r)
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return -EIO;
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if (r->type != ACPI_TYPE_INTEGER) {
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kfree(r);
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return -EIO;
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}
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status = !!r->integer.value;
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kfree(r);
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return snprintf(buffer, PAGE_SIZE, "%d\n", status);
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}
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static ssize_t fn_lock_store(struct device *dev,
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struct device_attribute *attr,
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const char *buffer, size_t count)
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{
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bool value;
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union acpi_object *r;
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int ret;
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ret = kstrtobool(buffer, &value);
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if (ret)
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return ret;
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r = lg_wmab(WM_FN_LOCK, WM_SET, value);
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if (!r)
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return -EIO;
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kfree(r);
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return count;
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}
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static ssize_t fn_lock_show(struct device *dev,
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struct device_attribute *attr, char *buffer)
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{
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unsigned int status;
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union acpi_object *r;
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r = lg_wmab(WM_FN_LOCK, WM_GET, 0);
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if (!r)
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return -EIO;
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if (r->type != ACPI_TYPE_BUFFER) {
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kfree(r);
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return -EIO;
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}
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status = !!r->buffer.pointer[0];
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kfree(r);
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return snprintf(buffer, PAGE_SIZE, "%d\n", status);
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}
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static ssize_t battery_care_limit_store(struct device *dev,
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struct device_attribute *attr,
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const char *buffer, size_t count)
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{
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unsigned long value;
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int ret;
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ret = kstrtoul(buffer, 10, &value);
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if (ret)
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return ret;
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if (value == 100 || value == 80) {
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union acpi_object *r;
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r = lg_wmab(WM_BATT_LIMIT, WM_SET, value);
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if (!r)
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return -EIO;
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kfree(r);
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return count;
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}
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return -EINVAL;
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}
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static ssize_t battery_care_limit_show(struct device *dev,
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struct device_attribute *attr,
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char *buffer)
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{
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unsigned int status;
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union acpi_object *r;
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r = lg_wmab(WM_BATT_LIMIT, WM_GET, 0);
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if (!r)
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return -EIO;
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if (r->type != ACPI_TYPE_INTEGER) {
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kfree(r);
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return -EIO;
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}
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status = r->integer.value;
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kfree(r);
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if (status != 80 && status != 100)
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status = 0;
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return snprintf(buffer, PAGE_SIZE, "%d\n", status);
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}
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static DEVICE_ATTR_RW(fan_mode);
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static DEVICE_ATTR_RW(usb_charge);
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static DEVICE_ATTR_RW(reader_mode);
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static DEVICE_ATTR_RW(fn_lock);
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static DEVICE_ATTR_RW(battery_care_limit);
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static struct attribute *dev_attributes[] = {
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&dev_attr_fan_mode.attr,
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&dev_attr_usb_charge.attr,
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&dev_attr_reader_mode.attr,
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&dev_attr_fn_lock.attr,
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&dev_attr_battery_care_limit.attr,
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NULL
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};
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static const struct attribute_group dev_attribute_group = {
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.attrs = dev_attributes,
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};
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static void tpad_led_set(struct led_classdev *cdev,
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enum led_brightness brightness)
|
|
{
|
|
union acpi_object *r;
|
|
|
|
r = lg_wmab(WM_TLED, WM_SET, brightness > LED_OFF);
|
|
kfree(r);
|
|
}
|
|
|
|
static enum led_brightness tpad_led_get(struct led_classdev *cdev)
|
|
{
|
|
return ggov(GOV_TLED) > 0 ? LED_ON : LED_OFF;
|
|
}
|
|
|
|
static LED_DEVICE(tpad_led, 1);
|
|
|
|
static void kbd_backlight_set(struct led_classdev *cdev,
|
|
enum led_brightness brightness)
|
|
{
|
|
u32 val;
|
|
union acpi_object *r;
|
|
|
|
val = 0x22;
|
|
if (brightness <= LED_OFF)
|
|
val = 0;
|
|
if (brightness >= LED_FULL)
|
|
val = 0x24;
|
|
r = lg_wmab(WM_KEY_LIGHT, WM_SET, val);
|
|
kfree(r);
|
|
}
|
|
|
|
static enum led_brightness kbd_backlight_get(struct led_classdev *cdev)
|
|
{
|
|
union acpi_object *r;
|
|
int val;
|
|
|
|
r = lg_wmab(WM_KEY_LIGHT, WM_GET, 0);
|
|
|
|
if (!r)
|
|
return LED_OFF;
|
|
|
|
if (r->type != ACPI_TYPE_BUFFER || r->buffer.pointer[1] != 0x05) {
|
|
kfree(r);
|
|
return LED_OFF;
|
|
}
|
|
|
|
switch (r->buffer.pointer[0] & 0x27) {
|
|
case 0x24:
|
|
val = LED_FULL;
|
|
break;
|
|
case 0x22:
|
|
val = LED_HALF;
|
|
break;
|
|
default:
|
|
val = LED_OFF;
|
|
}
|
|
|
|
kfree(r);
|
|
|
|
return val;
|
|
}
|
|
|
|
static LED_DEVICE(kbd_backlight, 255);
|
|
|
|
static void wmi_input_destroy(void)
|
|
{
|
|
if (inited & INIT_INPUT_WMI_2)
|
|
wmi_remove_notify_handler(WMI_EVENT_GUID2);
|
|
|
|
if (inited & INIT_INPUT_WMI_0)
|
|
wmi_remove_notify_handler(WMI_EVENT_GUID0);
|
|
|
|
if (inited & INIT_SPARSE_KEYMAP)
|
|
input_unregister_device(wmi_input_dev);
|
|
|
|
inited &= ~(INIT_INPUT_WMI_0 | INIT_INPUT_WMI_2 | INIT_SPARSE_KEYMAP);
|
|
}
|
|
|
|
static struct platform_driver pf_driver = {
|
|
.driver = {
|
|
.name = PLATFORM_NAME,
|
|
}
|
|
};
|
|
|
|
static int acpi_add(struct acpi_device *device)
|
|
{
|
|
int ret;
|
|
|
|
if (pf_device)
|
|
return 0;
|
|
|
|
ret = platform_driver_register(&pf_driver);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pf_device = platform_device_register_simple(PLATFORM_NAME,
|
|
PLATFORM_DEVID_NONE,
|
|
NULL, 0);
|
|
if (IS_ERR(pf_device)) {
|
|
ret = PTR_ERR(pf_device);
|
|
pf_device = NULL;
|
|
pr_err("unable to register platform device\n");
|
|
goto out_platform_registered;
|
|
}
|
|
|
|
ret = sysfs_create_group(&pf_device->dev.kobj, &dev_attribute_group);
|
|
if (ret)
|
|
goto out_platform_device;
|
|
|
|
/* LEDs are optional */
|
|
led_classdev_register(&pf_device->dev, &kbd_backlight);
|
|
led_classdev_register(&pf_device->dev, &tpad_led);
|
|
|
|
wmi_input_setup();
|
|
|
|
return 0;
|
|
|
|
out_platform_device:
|
|
platform_device_unregister(pf_device);
|
|
out_platform_registered:
|
|
platform_driver_unregister(&pf_driver);
|
|
return ret;
|
|
}
|
|
|
|
static int acpi_remove(struct acpi_device *device)
|
|
{
|
|
sysfs_remove_group(&pf_device->dev.kobj, &dev_attribute_group);
|
|
|
|
led_classdev_unregister(&tpad_led);
|
|
led_classdev_unregister(&kbd_backlight);
|
|
|
|
wmi_input_destroy();
|
|
platform_device_unregister(pf_device);
|
|
pf_device = NULL;
|
|
platform_driver_unregister(&pf_driver);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct acpi_device_id device_ids[] = {
|
|
{"LGEX0815", 0},
|
|
{"", 0}
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, device_ids);
|
|
|
|
static struct acpi_driver acpi_driver = {
|
|
.name = "LG Gram Laptop Support",
|
|
.class = "lg-laptop",
|
|
.ids = device_ids,
|
|
.ops = {
|
|
.add = acpi_add,
|
|
.remove = acpi_remove,
|
|
.notify = acpi_notify,
|
|
},
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int __init acpi_init(void)
|
|
{
|
|
int result;
|
|
|
|
result = acpi_bus_register_driver(&acpi_driver);
|
|
if (result < 0) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error registering driver\n"));
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit acpi_exit(void)
|
|
{
|
|
acpi_bus_unregister_driver(&acpi_driver);
|
|
}
|
|
|
|
module_init(acpi_init);
|
|
module_exit(acpi_exit);
|