// SPDX-License-Identifier: GPL-2.0
/*
 * Device physical location support
 *
 * Author: Won Chung <wonchung@google.com>
 */

#include <linux/acpi.h>
#include <linux/sysfs.h>
#include <linux/string_choices.h>

#include "physical_location.h"

bool dev_add_physical_location(struct device *dev)
{
        struct acpi_pld_info *pld;

        if (!has_acpi_companion(dev))
                return false;

        if (!acpi_get_physical_device_location(ACPI_HANDLE(dev), &pld))
                return false;

        dev->physical_location = kzalloc_obj(*dev->physical_location);
        if (!dev->physical_location) {
                ACPI_FREE(pld);
                return false;
        }

        dev->physical_location->panel = pld->panel;
        dev->physical_location->vertical_position = pld->vertical_position;
        dev->physical_location->horizontal_position = pld->horizontal_position;
        dev->physical_location->dock = pld->dock;
        dev->physical_location->lid = pld->lid;

        ACPI_FREE(pld);
        return true;
}

static ssize_t panel_show(struct device *dev, struct device_attribute *attr,
        char *buf)
{
        const char *panel;

        switch (dev->physical_location->panel) {
        case DEVICE_PANEL_TOP:
                panel = "top";
                break;
        case DEVICE_PANEL_BOTTOM:
                panel = "bottom";
                break;
        case DEVICE_PANEL_LEFT:
                panel = "left";
                break;
        case DEVICE_PANEL_RIGHT:
                panel = "right";
                break;
        case DEVICE_PANEL_FRONT:
                panel = "front";
                break;
        case DEVICE_PANEL_BACK:
                panel = "back";
                break;
        default:
                panel = "unknown";
        }
        return sysfs_emit(buf, "%s\n", panel);
}
static DEVICE_ATTR_RO(panel);

static ssize_t vertical_position_show(struct device *dev,
        struct device_attribute *attr, char *buf)
{
        const char *vertical_position;

        switch (dev->physical_location->vertical_position) {
        case DEVICE_VERT_POS_UPPER:
                vertical_position = "upper";
                break;
        case DEVICE_VERT_POS_CENTER:
                vertical_position = "center";
                break;
        case DEVICE_VERT_POS_LOWER:
                vertical_position = "lower";
                break;
        default:
                vertical_position = "unknown";
        }
        return sysfs_emit(buf, "%s\n", vertical_position);
}
static DEVICE_ATTR_RO(vertical_position);

static ssize_t horizontal_position_show(struct device *dev,
        struct device_attribute *attr, char *buf)
{
        const char *horizontal_position;

        switch (dev->physical_location->horizontal_position) {
        case DEVICE_HORI_POS_LEFT:
                horizontal_position = "left";
                break;
        case DEVICE_HORI_POS_CENTER:
                horizontal_position = "center";
                break;
        case DEVICE_HORI_POS_RIGHT:
                horizontal_position = "right";
                break;
        default:
                horizontal_position = "unknown";
        }
        return sysfs_emit(buf, "%s\n", horizontal_position);
}
static DEVICE_ATTR_RO(horizontal_position);

static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
        char *buf)
{
        return sysfs_emit(buf, "%s\n",
                str_yes_no(dev->physical_location->dock));
}
static DEVICE_ATTR_RO(dock);

static ssize_t lid_show(struct device *dev, struct device_attribute *attr,
        char *buf)
{
        return sysfs_emit(buf, "%s\n",
                str_yes_no(dev->physical_location->lid));
}
static DEVICE_ATTR_RO(lid);

static struct attribute *dev_attr_physical_location[] = {
        &dev_attr_panel.attr,
        &dev_attr_vertical_position.attr,
        &dev_attr_horizontal_position.attr,
        &dev_attr_dock.attr,
        &dev_attr_lid.attr,
        NULL,
};

const struct attribute_group dev_attr_physical_location_group = {
        .name = "physical_location",
        .attrs = dev_attr_physical_location,
};