mirror of
https://github.com/torvalds/linux.git
synced 2024-11-17 01:22:07 +00:00
platform/x86: Add System76 ACPI driver
Add System76 ACPI driver, which adds support for Fn-Fx key combinations, keyboard backlight, and airplane mode LEDs on System76 laptops running open source firmware. Signed-off-by: Jeremy Soller <jeremy@system76.com> Cc: platform-driver-x86@vger.kernel.org Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Jeremy Soller
Andy Shevchenko
parent
2a43c9fc87
commit
fd13c8622a
@ -15753,6 +15753,13 @@ F: drivers/hwtracing/stm/
|
||||
F: include/linux/stm.h
|
||||
F: include/uapi/linux/stm.h
|
||||
|
||||
SYSTEM76 ACPI DRIVER
|
||||
M: Jeremy Soller <jeremy@system76.com>
|
||||
M: System76 Product Development <productdev@system76.com>
|
||||
L: platform-driver-x86@vger.kernel.org
|
||||
S: Maintained
|
||||
F: drivers/platform/x86/system76_acpi.c
|
||||
|
||||
SYSV FILESYSTEM
|
||||
M: Christoph Hellwig <hch@infradead.org>
|
||||
S: Maintained
|
||||
|
||||
@ -1339,6 +1339,19 @@ config PCENGINES_APU2
|
||||
|
||||
source "drivers/platform/x86/intel_speed_select_if/Kconfig"
|
||||
|
||||
config SYSTEM76_ACPI
|
||||
tristate "System76 ACPI Driver"
|
||||
depends on ACPI
|
||||
select NEW_LEDS
|
||||
select LEDS_CLASS
|
||||
select LEDS_TRIGGERS
|
||||
help
|
||||
This is a driver for System76 laptops running open firmware. It adds
|
||||
support for Fn-Fx key combinations, keyboard backlight, and airplane mode
|
||||
LEDs.
|
||||
|
||||
If you have a System76 laptop running open firmware, say Y or M here.
|
||||
|
||||
endif # X86_PLATFORM_DEVICES
|
||||
|
||||
config PMC_ATOM
|
||||
|
||||
@ -104,3 +104,4 @@ obj-$(CONFIG_I2C_MULTI_INSTANTIATE) += i2c-multi-instantiate.o
|
||||
obj-$(CONFIG_INTEL_ATOMISP2_PM) += intel_atomisp2_pm.o
|
||||
obj-$(CONFIG_PCENGINES_APU2) += pcengines-apuv2.o
|
||||
obj-$(CONFIG_INTEL_SPEED_SELECT_INTERFACE) += intel_speed_select_if/
|
||||
obj-$(CONFIG_SYSTEM76_ACPI) += system76_acpi.o
|
||||
|
||||
384
drivers/platform/x86/system76_acpi.c
Normal file
384
drivers/platform/x86/system76_acpi.c
Normal file
@ -0,0 +1,384 @@
|
||||
// SPDX-License-Identifier: GPL-2.0+
|
||||
/*
|
||||
* System76 ACPI Driver
|
||||
*
|
||||
* Copyright (C) 2019 System76
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#include <linux/acpi.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/leds.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/pci_ids.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
struct system76_data {
|
||||
struct acpi_device *acpi_dev;
|
||||
struct led_classdev ap_led;
|
||||
struct led_classdev kb_led;
|
||||
enum led_brightness kb_brightness;
|
||||
enum led_brightness kb_toggle_brightness;
|
||||
int kb_color;
|
||||
};
|
||||
|
||||
static const struct acpi_device_id device_ids[] = {
|
||||
{"17761776", 0},
|
||||
{"", 0},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(acpi, device_ids);
|
||||
|
||||
// Array of keyboard LED brightness levels
|
||||
static const enum led_brightness kb_levels[] = {
|
||||
48,
|
||||
72,
|
||||
96,
|
||||
144,
|
||||
192,
|
||||
255
|
||||
};
|
||||
|
||||
// Array of keyboard LED colors in 24-bit RGB format
|
||||
static const int kb_colors[] = {
|
||||
0xFFFFFF,
|
||||
0x0000FF,
|
||||
0xFF0000,
|
||||
0xFF00FF,
|
||||
0x00FF00,
|
||||
0x00FFFF,
|
||||
0xFFFF00
|
||||
};
|
||||
|
||||
// Get a System76 ACPI device value by name
|
||||
static int system76_get(struct system76_data *data, char *method)
|
||||
{
|
||||
acpi_handle handle;
|
||||
acpi_status status;
|
||||
unsigned long long ret = 0;
|
||||
|
||||
handle = acpi_device_handle(data->acpi_dev);
|
||||
status = acpi_evaluate_integer(handle, method, NULL, &ret);
|
||||
if (ACPI_SUCCESS(status))
|
||||
return (int)ret;
|
||||
else
|
||||
return -1;
|
||||
}
|
||||
|
||||
// Set a System76 ACPI device value by name
|
||||
static int system76_set(struct system76_data *data, char *method, int value)
|
||||
{
|
||||
union acpi_object obj;
|
||||
struct acpi_object_list obj_list;
|
||||
acpi_handle handle;
|
||||
acpi_status status;
|
||||
|
||||
obj.type = ACPI_TYPE_INTEGER;
|
||||
obj.integer.value = value;
|
||||
obj_list.count = 1;
|
||||
obj_list.pointer = &obj;
|
||||
handle = acpi_device_handle(data->acpi_dev);
|
||||
status = acpi_evaluate_object(handle, method, &obj_list, NULL);
|
||||
if (ACPI_SUCCESS(status))
|
||||
return 0;
|
||||
else
|
||||
return -1;
|
||||
}
|
||||
|
||||
// Get the airplane mode LED brightness
|
||||
static enum led_brightness ap_led_get(struct led_classdev *led)
|
||||
{
|
||||
struct system76_data *data;
|
||||
int value;
|
||||
|
||||
data = container_of(led, struct system76_data, ap_led);
|
||||
value = system76_get(data, "GAPL");
|
||||
if (value > 0)
|
||||
return (enum led_brightness)value;
|
||||
else
|
||||
return LED_OFF;
|
||||
}
|
||||
|
||||
// Set the airplane mode LED brightness
|
||||
static void ap_led_set(struct led_classdev *led, enum led_brightness value)
|
||||
{
|
||||
struct system76_data *data;
|
||||
|
||||
data = container_of(led, struct system76_data, ap_led);
|
||||
system76_set(data, "SAPL", value == LED_OFF ? 0 : 1);
|
||||
}
|
||||
|
||||
// Get the last set keyboard LED brightness
|
||||
static enum led_brightness kb_led_get(struct led_classdev *led)
|
||||
{
|
||||
struct system76_data *data;
|
||||
|
||||
data = container_of(led, struct system76_data, kb_led);
|
||||
return data->kb_brightness;
|
||||
}
|
||||
|
||||
// Set the keyboard LED brightness
|
||||
static void kb_led_set(struct led_classdev *led, enum led_brightness value)
|
||||
{
|
||||
struct system76_data *data;
|
||||
|
||||
data = container_of(led, struct system76_data, kb_led);
|
||||
data->kb_brightness = value;
|
||||
system76_set(data, "SKBL", (int)data->kb_brightness);
|
||||
}
|
||||
|
||||
// Get the last set keyboard LED color
|
||||
static ssize_t kb_led_color_show(
|
||||
struct device *dev,
|
||||
struct device_attribute *dev_attr,
|
||||
char *buf)
|
||||
{
|
||||
struct led_classdev *led;
|
||||
struct system76_data *data;
|
||||
|
||||
led = (struct led_classdev *)dev->driver_data;
|
||||
data = container_of(led, struct system76_data, kb_led);
|
||||
return sprintf(buf, "%06X\n", data->kb_color);
|
||||
}
|
||||
|
||||
// Set the keyboard LED color
|
||||
static ssize_t kb_led_color_store(
|
||||
struct device *dev,
|
||||
struct device_attribute *dev_attr,
|
||||
const char *buf,
|
||||
size_t size)
|
||||
{
|
||||
struct led_classdev *led;
|
||||
struct system76_data *data;
|
||||
unsigned int val;
|
||||
int ret;
|
||||
|
||||
led = (struct led_classdev *)dev->driver_data;
|
||||
data = container_of(led, struct system76_data, kb_led);
|
||||
ret = kstrtouint(buf, 16, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
if (val > 0xFFFFFF)
|
||||
return -EINVAL;
|
||||
data->kb_color = (int)val;
|
||||
system76_set(data, "SKBC", data->kb_color);
|
||||
|
||||
return size;
|
||||
}
|
||||
|
||||
static const struct device_attribute kb_led_color_dev_attr = {
|
||||
.attr = {
|
||||
.name = "color",
|
||||
.mode = 0644,
|
||||
},
|
||||
.show = kb_led_color_show,
|
||||
.store = kb_led_color_store,
|
||||
};
|
||||
|
||||
// Notify that the keyboard LED was changed by hardware
|
||||
static void kb_led_notify(struct system76_data *data)
|
||||
{
|
||||
led_classdev_notify_brightness_hw_changed(
|
||||
&data->kb_led,
|
||||
data->kb_brightness
|
||||
);
|
||||
}
|
||||
|
||||
// Read keyboard LED brightness as set by hardware
|
||||
static void kb_led_hotkey_hardware(struct system76_data *data)
|
||||
{
|
||||
int value;
|
||||
|
||||
value = system76_get(data, "GKBL");
|
||||
if (value < 0)
|
||||
return;
|
||||
data->kb_brightness = value;
|
||||
kb_led_notify(data);
|
||||
}
|
||||
|
||||
// Toggle the keyboard LED
|
||||
static void kb_led_hotkey_toggle(struct system76_data *data)
|
||||
{
|
||||
if (data->kb_brightness > 0) {
|
||||
data->kb_toggle_brightness = data->kb_brightness;
|
||||
kb_led_set(&data->kb_led, 0);
|
||||
} else {
|
||||
kb_led_set(&data->kb_led, data->kb_toggle_brightness);
|
||||
}
|
||||
kb_led_notify(data);
|
||||
}
|
||||
|
||||
// Decrease the keyboard LED brightness
|
||||
static void kb_led_hotkey_down(struct system76_data *data)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (data->kb_brightness > 0) {
|
||||
for (i = ARRAY_SIZE(kb_levels); i > 0; i--) {
|
||||
if (kb_levels[i - 1] < data->kb_brightness) {
|
||||
kb_led_set(&data->kb_led, kb_levels[i - 1]);
|
||||
break;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
kb_led_set(&data->kb_led, data->kb_toggle_brightness);
|
||||
}
|
||||
kb_led_notify(data);
|
||||
}
|
||||
|
||||
// Increase the keyboard LED brightness
|
||||
static void kb_led_hotkey_up(struct system76_data *data)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (data->kb_brightness > 0) {
|
||||
for (i = 0; i < ARRAY_SIZE(kb_levels); i++) {
|
||||
if (kb_levels[i] > data->kb_brightness) {
|
||||
kb_led_set(&data->kb_led, kb_levels[i]);
|
||||
break;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
kb_led_set(&data->kb_led, data->kb_toggle_brightness);
|
||||
}
|
||||
kb_led_notify(data);
|
||||
}
|
||||
|
||||
// Cycle the keyboard LED color
|
||||
static void kb_led_hotkey_color(struct system76_data *data)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (data->kb_color < 0)
|
||||
return;
|
||||
if (data->kb_brightness > 0) {
|
||||
for (i = 0; i < ARRAY_SIZE(kb_colors); i++) {
|
||||
if (kb_colors[i] == data->kb_color)
|
||||
break;
|
||||
}
|
||||
i += 1;
|
||||
if (i >= ARRAY_SIZE(kb_colors))
|
||||
i = 0;
|
||||
data->kb_color = kb_colors[i];
|
||||
system76_set(data, "SKBC", data->kb_color);
|
||||
} else {
|
||||
kb_led_set(&data->kb_led, data->kb_toggle_brightness);
|
||||
}
|
||||
kb_led_notify(data);
|
||||
}
|
||||
|
||||
// Handle ACPI notification
|
||||
static void system76_notify(struct acpi_device *acpi_dev, u32 event)
|
||||
{
|
||||
struct system76_data *data;
|
||||
|
||||
data = acpi_driver_data(acpi_dev);
|
||||
switch (event) {
|
||||
case 0x80:
|
||||
kb_led_hotkey_hardware(data);
|
||||
break;
|
||||
case 0x81:
|
||||
kb_led_hotkey_toggle(data);
|
||||
break;
|
||||
case 0x82:
|
||||
kb_led_hotkey_down(data);
|
||||
break;
|
||||
case 0x83:
|
||||
kb_led_hotkey_up(data);
|
||||
break;
|
||||
case 0x84:
|
||||
kb_led_hotkey_color(data);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// Add a System76 ACPI device
|
||||
static int system76_add(struct acpi_device *acpi_dev)
|
||||
{
|
||||
struct system76_data *data;
|
||||
int err;
|
||||
|
||||
data = devm_kzalloc(&acpi_dev->dev, sizeof(*data), GFP_KERNEL);
|
||||
if (!data)
|
||||
return -ENOMEM;
|
||||
acpi_dev->driver_data = data;
|
||||
data->acpi_dev = acpi_dev;
|
||||
|
||||
err = system76_get(data, "INIT");
|
||||
if (err)
|
||||
return err;
|
||||
data->ap_led.name = "system76_acpi::airplane";
|
||||
data->ap_led.flags = LED_CORE_SUSPENDRESUME;
|
||||
data->ap_led.brightness_get = ap_led_get;
|
||||
data->ap_led.brightness_set = ap_led_set;
|
||||
data->ap_led.max_brightness = 1;
|
||||
data->ap_led.default_trigger = "rfkill-none";
|
||||
err = devm_led_classdev_register(&acpi_dev->dev, &data->ap_led);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
data->kb_led.name = "system76_acpi::kbd_backlight";
|
||||
data->kb_led.flags = LED_BRIGHT_HW_CHANGED | LED_CORE_SUSPENDRESUME;
|
||||
data->kb_led.brightness_get = kb_led_get;
|
||||
data->kb_led.brightness_set = kb_led_set;
|
||||
if (acpi_has_method(acpi_device_handle(data->acpi_dev), "SKBC")) {
|
||||
data->kb_led.max_brightness = 255;
|
||||
data->kb_toggle_brightness = 72;
|
||||
data->kb_color = 0xffffff;
|
||||
system76_set(data, "SKBC", data->kb_color);
|
||||
} else {
|
||||
data->kb_led.max_brightness = 5;
|
||||
data->kb_color = -1;
|
||||
}
|
||||
err = devm_led_classdev_register(&acpi_dev->dev, &data->kb_led);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
if (data->kb_color >= 0) {
|
||||
err = device_create_file(
|
||||
data->kb_led.dev,
|
||||
&kb_led_color_dev_attr
|
||||
);
|
||||
if (err)
|
||||
return err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Remove a System76 ACPI device
|
||||
static int system76_remove(struct acpi_device *acpi_dev)
|
||||
{
|
||||
struct system76_data *data;
|
||||
|
||||
data = acpi_driver_data(acpi_dev);
|
||||
if (data->kb_color >= 0)
|
||||
device_remove_file(data->kb_led.dev, &kb_led_color_dev_attr);
|
||||
|
||||
devm_led_classdev_unregister(&acpi_dev->dev, &data->ap_led);
|
||||
|
||||
devm_led_classdev_unregister(&acpi_dev->dev, &data->kb_led);
|
||||
|
||||
system76_get(data, "FINI");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct acpi_driver system76_driver = {
|
||||
.name = "System76 ACPI Driver",
|
||||
.class = "hotkey",
|
||||
.ids = device_ids,
|
||||
.ops = {
|
||||
.add = system76_add,
|
||||
.remove = system76_remove,
|
||||
.notify = system76_notify,
|
||||
},
|
||||
};
|
||||
module_acpi_driver(system76_driver);
|
||||
|
||||
MODULE_DESCRIPTION("System76 ACPI Driver");
|
||||
MODULE_AUTHOR("Jeremy Soller <jeremy@system76.com>");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user