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![Tim Crawford](/assets/img/avatar_default.png)
Create the attribute groups for kb_led_color and set the `groups` field in kb_led. While touching it, also change its show method to use sysfs_emit() instead of sprintf(). Signed-off-by: Tim Crawford <tcrawford@system76.com> Link: https://lore.kernel.org/r/20211006202202.7479-5-tcrawford@system76.com Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
780 lines
18 KiB
C
780 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* System76 ACPI Driver
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*
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* Copyright (C) 2019 System76
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/acpi.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/init.h>
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#include <linux/input.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/pci_ids.h>
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#include <linux/power_supply.h>
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#include <linux/sysfs.h>
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#include <linux/types.h>
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#include <acpi/battery.h>
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struct system76_data {
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struct acpi_device *acpi_dev;
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struct led_classdev ap_led;
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struct led_classdev kb_led;
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enum led_brightness kb_brightness;
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enum led_brightness kb_toggle_brightness;
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int kb_color;
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struct device *therm;
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union acpi_object *nfan;
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union acpi_object *ntmp;
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struct input_dev *input;
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};
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static const struct acpi_device_id device_ids[] = {
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{"17761776", 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, device_ids);
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// Array of keyboard LED brightness levels
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static const enum led_brightness kb_levels[] = {
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48,
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72,
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96,
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144,
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192,
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255
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};
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// Array of keyboard LED colors in 24-bit RGB format
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static const int kb_colors[] = {
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0xFFFFFF,
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0x0000FF,
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0xFF0000,
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0xFF00FF,
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0x00FF00,
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0x00FFFF,
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0xFFFF00
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};
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// Get a System76 ACPI device value by name
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static int system76_get(struct system76_data *data, char *method)
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{
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acpi_handle handle;
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acpi_status status;
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unsigned long long ret = 0;
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handle = acpi_device_handle(data->acpi_dev);
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status = acpi_evaluate_integer(handle, method, NULL, &ret);
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if (ACPI_SUCCESS(status))
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return ret;
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return -ENODEV;
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}
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// Get a System76 ACPI device value by name with index
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static int system76_get_index(struct system76_data *data, char *method, int index)
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{
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union acpi_object obj;
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struct acpi_object_list obj_list;
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acpi_handle handle;
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acpi_status status;
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unsigned long long ret = 0;
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obj.type = ACPI_TYPE_INTEGER;
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obj.integer.value = index;
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obj_list.count = 1;
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obj_list.pointer = &obj;
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handle = acpi_device_handle(data->acpi_dev);
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status = acpi_evaluate_integer(handle, method, &obj_list, &ret);
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if (ACPI_SUCCESS(status))
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return ret;
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return -ENODEV;
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}
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// Get a System76 ACPI device object by name
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static int system76_get_object(struct system76_data *data, char *method, union acpi_object **obj)
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{
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acpi_handle handle;
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acpi_status status;
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struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
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handle = acpi_device_handle(data->acpi_dev);
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status = acpi_evaluate_object(handle, method, NULL, &buf);
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if (ACPI_SUCCESS(status)) {
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*obj = buf.pointer;
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return 0;
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}
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return -ENODEV;
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}
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// Get a name from a System76 ACPI device object
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static char *system76_name(union acpi_object *obj, int index)
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{
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if (obj && obj->type == ACPI_TYPE_PACKAGE && index <= obj->package.count) {
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if (obj->package.elements[index].type == ACPI_TYPE_STRING)
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return obj->package.elements[index].string.pointer;
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}
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return NULL;
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}
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// Set a System76 ACPI device value by name
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static int system76_set(struct system76_data *data, char *method, int value)
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{
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union acpi_object obj;
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struct acpi_object_list obj_list;
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acpi_handle handle;
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acpi_status status;
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obj.type = ACPI_TYPE_INTEGER;
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obj.integer.value = value;
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obj_list.count = 1;
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obj_list.pointer = &obj;
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handle = acpi_device_handle(data->acpi_dev);
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status = acpi_evaluate_object(handle, method, &obj_list, NULL);
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if (ACPI_SUCCESS(status))
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return 0;
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else
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return -1;
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}
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#define BATTERY_THRESHOLD_INVALID 0xFF
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enum {
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THRESHOLD_START,
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THRESHOLD_END,
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};
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static ssize_t battery_get_threshold(int which, char *buf)
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{
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struct acpi_object_list input;
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union acpi_object param;
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acpi_handle handle;
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acpi_status status;
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unsigned long long ret = BATTERY_THRESHOLD_INVALID;
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handle = ec_get_handle();
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if (!handle)
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return -ENODEV;
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input.count = 1;
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input.pointer = ¶m;
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// Start/stop selection
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param.type = ACPI_TYPE_INTEGER;
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param.integer.value = which;
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status = acpi_evaluate_integer(handle, "GBCT", &input, &ret);
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if (ACPI_FAILURE(status))
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return -EIO;
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if (ret == BATTERY_THRESHOLD_INVALID)
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return -EINVAL;
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return sysfs_emit(buf, "%d\n", (int)ret);
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}
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static ssize_t battery_set_threshold(int which, const char *buf, size_t count)
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{
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struct acpi_object_list input;
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union acpi_object params[2];
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acpi_handle handle;
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acpi_status status;
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unsigned int value;
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int ret;
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handle = ec_get_handle();
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if (!handle)
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return -ENODEV;
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ret = kstrtouint(buf, 10, &value);
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if (ret)
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return ret;
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if (value > 100)
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return -EINVAL;
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input.count = 2;
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input.pointer = params;
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// Start/stop selection
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params[0].type = ACPI_TYPE_INTEGER;
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params[0].integer.value = which;
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// Threshold value
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params[1].type = ACPI_TYPE_INTEGER;
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params[1].integer.value = value;
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status = acpi_evaluate_object(handle, "SBCT", &input, NULL);
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if (ACPI_FAILURE(status))
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return -EIO;
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return count;
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}
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static ssize_t charge_control_start_threshold_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return battery_get_threshold(THRESHOLD_START, buf);
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}
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static ssize_t charge_control_start_threshold_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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return battery_set_threshold(THRESHOLD_START, buf, count);
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}
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static DEVICE_ATTR_RW(charge_control_start_threshold);
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static ssize_t charge_control_end_threshold_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return battery_get_threshold(THRESHOLD_END, buf);
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}
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static ssize_t charge_control_end_threshold_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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return battery_set_threshold(THRESHOLD_END, buf, count);
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}
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static DEVICE_ATTR_RW(charge_control_end_threshold);
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static struct attribute *system76_battery_attrs[] = {
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&dev_attr_charge_control_start_threshold.attr,
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&dev_attr_charge_control_end_threshold.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(system76_battery);
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static int system76_battery_add(struct power_supply *battery)
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{
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// System76 EC only supports 1 battery
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if (strcmp(battery->desc->name, "BAT0") != 0)
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return -ENODEV;
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if (device_add_groups(&battery->dev, system76_battery_groups))
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return -ENODEV;
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return 0;
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}
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static int system76_battery_remove(struct power_supply *battery)
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{
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device_remove_groups(&battery->dev, system76_battery_groups);
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return 0;
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}
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static struct acpi_battery_hook system76_battery_hook = {
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.add_battery = system76_battery_add,
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.remove_battery = system76_battery_remove,
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.name = "System76 Battery Extension",
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};
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static void system76_battery_init(void)
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{
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acpi_handle handle;
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handle = ec_get_handle();
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if (handle && acpi_has_method(handle, "GBCT"))
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battery_hook_register(&system76_battery_hook);
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}
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static void system76_battery_exit(void)
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{
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acpi_handle handle;
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handle = ec_get_handle();
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if (handle && acpi_has_method(handle, "GBCT"))
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battery_hook_unregister(&system76_battery_hook);
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}
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// Get the airplane mode LED brightness
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static enum led_brightness ap_led_get(struct led_classdev *led)
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{
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struct system76_data *data;
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int value;
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data = container_of(led, struct system76_data, ap_led);
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value = system76_get(data, "GAPL");
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if (value > 0)
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return (enum led_brightness)value;
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else
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return LED_OFF;
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}
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// Set the airplane mode LED brightness
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static int ap_led_set(struct led_classdev *led, enum led_brightness value)
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{
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struct system76_data *data;
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data = container_of(led, struct system76_data, ap_led);
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return system76_set(data, "SAPL", value == LED_OFF ? 0 : 1);
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}
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// Get the last set keyboard LED brightness
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static enum led_brightness kb_led_get(struct led_classdev *led)
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{
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struct system76_data *data;
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data = container_of(led, struct system76_data, kb_led);
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return data->kb_brightness;
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}
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// Set the keyboard LED brightness
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static int kb_led_set(struct led_classdev *led, enum led_brightness value)
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{
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struct system76_data *data;
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data = container_of(led, struct system76_data, kb_led);
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data->kb_brightness = value;
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return system76_set(data, "SKBL", (int)data->kb_brightness);
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}
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// Get the last set keyboard LED color
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static ssize_t kb_led_color_show(
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struct device *dev,
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struct device_attribute *dev_attr,
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char *buf)
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{
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struct led_classdev *led;
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struct system76_data *data;
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led = (struct led_classdev *)dev->driver_data;
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data = container_of(led, struct system76_data, kb_led);
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return sysfs_emit(buf, "%06X\n", data->kb_color);
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}
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// Set the keyboard LED color
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static ssize_t kb_led_color_store(
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struct device *dev,
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struct device_attribute *dev_attr,
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const char *buf,
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size_t size)
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{
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struct led_classdev *led;
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struct system76_data *data;
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unsigned int val;
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int ret;
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led = (struct led_classdev *)dev->driver_data;
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data = container_of(led, struct system76_data, kb_led);
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ret = kstrtouint(buf, 16, &val);
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if (ret)
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return ret;
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if (val > 0xFFFFFF)
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return -EINVAL;
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data->kb_color = (int)val;
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system76_set(data, "SKBC", data->kb_color);
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return size;
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}
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static struct device_attribute dev_attr_kb_led_color = {
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.attr = {
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.name = "color",
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.mode = 0644,
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},
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.show = kb_led_color_show,
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.store = kb_led_color_store,
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};
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static struct attribute *system76_kb_led_color_attrs[] = {
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&dev_attr_kb_led_color.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(system76_kb_led_color);
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// Notify that the keyboard LED was changed by hardware
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static void kb_led_notify(struct system76_data *data)
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{
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led_classdev_notify_brightness_hw_changed(
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&data->kb_led,
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data->kb_brightness
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);
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}
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// Read keyboard LED brightness as set by hardware
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static void kb_led_hotkey_hardware(struct system76_data *data)
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{
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int value;
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value = system76_get(data, "GKBL");
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if (value < 0)
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return;
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data->kb_brightness = value;
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kb_led_notify(data);
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}
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// Toggle the keyboard LED
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static void kb_led_hotkey_toggle(struct system76_data *data)
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{
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if (data->kb_brightness > 0) {
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data->kb_toggle_brightness = data->kb_brightness;
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kb_led_set(&data->kb_led, 0);
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} else {
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kb_led_set(&data->kb_led, data->kb_toggle_brightness);
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}
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kb_led_notify(data);
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}
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// Decrease the keyboard LED brightness
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static void kb_led_hotkey_down(struct system76_data *data)
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{
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int i;
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if (data->kb_brightness > 0) {
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for (i = ARRAY_SIZE(kb_levels); i > 0; i--) {
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if (kb_levels[i - 1] < data->kb_brightness) {
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kb_led_set(&data->kb_led, kb_levels[i - 1]);
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break;
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}
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}
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} else {
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kb_led_set(&data->kb_led, data->kb_toggle_brightness);
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}
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kb_led_notify(data);
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}
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// Increase the keyboard LED brightness
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static void kb_led_hotkey_up(struct system76_data *data)
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{
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int i;
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if (data->kb_brightness > 0) {
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for (i = 0; i < ARRAY_SIZE(kb_levels); i++) {
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if (kb_levels[i] > data->kb_brightness) {
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kb_led_set(&data->kb_led, kb_levels[i]);
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break;
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}
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}
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} else {
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kb_led_set(&data->kb_led, data->kb_toggle_brightness);
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}
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kb_led_notify(data);
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}
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// Cycle the keyboard LED color
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static void kb_led_hotkey_color(struct system76_data *data)
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{
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int i;
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if (data->kb_color < 0)
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return;
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if (data->kb_brightness > 0) {
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for (i = 0; i < ARRAY_SIZE(kb_colors); i++) {
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if (kb_colors[i] == data->kb_color)
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break;
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}
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i += 1;
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if (i >= ARRAY_SIZE(kb_colors))
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i = 0;
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data->kb_color = kb_colors[i];
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system76_set(data, "SKBC", data->kb_color);
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} else {
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kb_led_set(&data->kb_led, data->kb_toggle_brightness);
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}
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kb_led_notify(data);
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}
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static umode_t thermal_is_visible(const void *drvdata, enum hwmon_sensor_types type,
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u32 attr, int channel)
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{
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const struct system76_data *data = drvdata;
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switch (type) {
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case hwmon_fan:
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case hwmon_pwm:
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if (system76_name(data->nfan, channel))
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return 0444;
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break;
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case hwmon_temp:
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if (system76_name(data->ntmp, channel))
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return 0444;
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break;
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default:
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return 0;
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}
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return 0;
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}
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static int thermal_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
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int channel, long *val)
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{
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struct system76_data *data = dev_get_drvdata(dev);
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int raw;
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switch (type) {
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case hwmon_fan:
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if (attr == hwmon_fan_input) {
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raw = system76_get_index(data, "GFAN", channel);
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if (raw < 0)
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return raw;
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*val = (raw >> 8) & 0xFFFF;
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return 0;
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}
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break;
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case hwmon_pwm:
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if (attr == hwmon_pwm_input) {
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raw = system76_get_index(data, "GFAN", channel);
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if (raw < 0)
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return raw;
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*val = raw & 0xFF;
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return 0;
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}
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break;
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case hwmon_temp:
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if (attr == hwmon_temp_input) {
|
|
raw = system76_get_index(data, "GTMP", channel);
|
|
if (raw < 0)
|
|
return raw;
|
|
*val = raw * 1000;
|
|
return 0;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int thermal_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
|
|
int channel, const char **str)
|
|
{
|
|
struct system76_data *data = dev_get_drvdata(dev);
|
|
|
|
switch (type) {
|
|
case hwmon_fan:
|
|
if (attr == hwmon_fan_label) {
|
|
*str = system76_name(data->nfan, channel);
|
|
if (*str)
|
|
return 0;
|
|
}
|
|
break;
|
|
|
|
case hwmon_temp:
|
|
if (attr == hwmon_temp_label) {
|
|
*str = system76_name(data->ntmp, channel);
|
|
if (*str)
|
|
return 0;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static const struct hwmon_ops thermal_ops = {
|
|
.is_visible = thermal_is_visible,
|
|
.read = thermal_read,
|
|
.read_string = thermal_read_string,
|
|
};
|
|
|
|
// Allocate up to 8 fans and temperatures
|
|
static const struct hwmon_channel_info *thermal_channel_info[] = {
|
|
HWMON_CHANNEL_INFO(fan,
|
|
HWMON_F_INPUT | HWMON_F_LABEL,
|
|
HWMON_F_INPUT | HWMON_F_LABEL,
|
|
HWMON_F_INPUT | HWMON_F_LABEL,
|
|
HWMON_F_INPUT | HWMON_F_LABEL,
|
|
HWMON_F_INPUT | HWMON_F_LABEL,
|
|
HWMON_F_INPUT | HWMON_F_LABEL,
|
|
HWMON_F_INPUT | HWMON_F_LABEL,
|
|
HWMON_F_INPUT | HWMON_F_LABEL),
|
|
HWMON_CHANNEL_INFO(pwm,
|
|
HWMON_PWM_INPUT,
|
|
HWMON_PWM_INPUT,
|
|
HWMON_PWM_INPUT,
|
|
HWMON_PWM_INPUT,
|
|
HWMON_PWM_INPUT,
|
|
HWMON_PWM_INPUT,
|
|
HWMON_PWM_INPUT,
|
|
HWMON_PWM_INPUT),
|
|
HWMON_CHANNEL_INFO(temp,
|
|
HWMON_T_INPUT | HWMON_T_LABEL,
|
|
HWMON_T_INPUT | HWMON_T_LABEL,
|
|
HWMON_T_INPUT | HWMON_T_LABEL,
|
|
HWMON_T_INPUT | HWMON_T_LABEL,
|
|
HWMON_T_INPUT | HWMON_T_LABEL,
|
|
HWMON_T_INPUT | HWMON_T_LABEL,
|
|
HWMON_T_INPUT | HWMON_T_LABEL,
|
|
HWMON_T_INPUT | HWMON_T_LABEL),
|
|
NULL
|
|
};
|
|
|
|
static const struct hwmon_chip_info thermal_chip_info = {
|
|
.ops = &thermal_ops,
|
|
.info = thermal_channel_info,
|
|
};
|
|
|
|
static void input_key(struct system76_data *data, unsigned int code)
|
|
{
|
|
input_report_key(data->input, code, 1);
|
|
input_sync(data->input);
|
|
|
|
input_report_key(data->input, code, 0);
|
|
input_sync(data->input);
|
|
}
|
|
|
|
// 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;
|
|
case 0x85:
|
|
input_key(data, KEY_SCREENLOCK);
|
|
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_blocking = 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_blocking = kb_led_set;
|
|
if (acpi_has_method(acpi_device_handle(data->acpi_dev), "SKBC")) {
|
|
data->kb_led.max_brightness = 255;
|
|
data->kb_led.groups = system76_kb_led_color_groups;
|
|
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;
|
|
|
|
data->input = devm_input_allocate_device(&acpi_dev->dev);
|
|
if (!data->input)
|
|
return -ENOMEM;
|
|
|
|
data->input->name = "System76 ACPI Hotkeys";
|
|
data->input->phys = "system76_acpi/input0";
|
|
data->input->id.bustype = BUS_HOST;
|
|
data->input->dev.parent = &acpi_dev->dev;
|
|
input_set_capability(data->input, EV_KEY, KEY_SCREENLOCK);
|
|
|
|
err = input_register_device(data->input);
|
|
if (err)
|
|
goto error;
|
|
|
|
err = system76_get_object(data, "NFAN", &data->nfan);
|
|
if (err)
|
|
goto error;
|
|
|
|
err = system76_get_object(data, "NTMP", &data->ntmp);
|
|
if (err)
|
|
goto error;
|
|
|
|
data->therm = devm_hwmon_device_register_with_info(&acpi_dev->dev,
|
|
"system76_acpi", data, &thermal_chip_info, NULL);
|
|
err = PTR_ERR_OR_ZERO(data->therm);
|
|
if (err)
|
|
goto error;
|
|
|
|
system76_battery_init();
|
|
|
|
return 0;
|
|
|
|
error:
|
|
kfree(data->ntmp);
|
|
kfree(data->nfan);
|
|
input_free_device(data->input);
|
|
return err;
|
|
}
|
|
|
|
// Remove a System76 ACPI device
|
|
static int system76_remove(struct acpi_device *acpi_dev)
|
|
{
|
|
struct system76_data *data;
|
|
|
|
data = acpi_driver_data(acpi_dev);
|
|
|
|
system76_battery_exit();
|
|
|
|
devm_led_classdev_unregister(&acpi_dev->dev, &data->ap_led);
|
|
devm_led_classdev_unregister(&acpi_dev->dev, &data->kb_led);
|
|
|
|
kfree(data->nfan);
|
|
kfree(data->ntmp);
|
|
|
|
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");
|