// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  HID driver for Retrode 2 controller adapter and plug-in extensions
 *
 *  Copyright (c) 2017 Bastien Nocera <hadess@hadess.net>
 */

/*
 */

#include <linux/input.h>
#include <linux/slab.h>
#include <linux/hid.h>
#include <linux/module.h>
#include "hid-ids.h"

#define CONTROLLER_NAME_BASE "Retrode"

static int retrode_input_configured(struct hid_device *hdev,
                                        struct hid_input *hi)
{
        struct hid_field *field = hi->report->field[0];
        const char *suffix;
        int number = 0;
        char *name;

        switch (field->report->id) {
        case 0:
                suffix = "SNES Mouse";
                break;
        case 1:
        case 2:
                suffix = "SNES / N64";
                number = field->report->id;
                break;
        case 3:
        case 4:
                suffix = "Mega Drive";
                number = field->report->id - 2;
                break;
        default:
                hid_err(hdev, "Got unhandled report id %d\n", field->report->id);
                suffix = "Unknown";
        }

        if (number)
                name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
                                "%s %s #%d", CONTROLLER_NAME_BASE,
                                suffix, number);
        else
                name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
                                "%s %s", CONTROLLER_NAME_BASE, suffix);

        if (!name)
                return -ENOMEM;

        hi->input->name = name;

        return 0;
}

static int retrode_probe(struct hid_device *hdev,
                        const struct hid_device_id *id)
{

        int ret;

        /* Has no effect on the mouse device */
        hdev->quirks |= HID_QUIRK_MULTI_INPUT;

        ret = hid_parse(hdev);
        if (ret)
                return ret;

        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
        if (ret)
                return ret;

        return 0;
}

static const struct hid_device_id retrode_devices[] = {
        { HID_USB_DEVICE(USB_VENDOR_ID_FUTURE_TECHNOLOGY, USB_DEVICE_ID_RETRODE2) },
        { }
};
MODULE_DEVICE_TABLE(hid, retrode_devices);

static struct hid_driver retrode_driver = {
        .name             = "hid-retrode",
        .id_table         = retrode_devices,
        .input_configured = retrode_input_configured,
        .probe            = retrode_probe,
};

module_hid_driver(retrode_driver);

MODULE_DESCRIPTION("HID driver for Retrode 2 controller adapter and plug-in extensions");
MODULE_LICENSE("GPL");