// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Roccat KonePure driver for Linux
 *
 * Copyright (c) 2012 Stefan Achatz <erazor_de@users.sourceforge.net>
 */

/*
 */

/*
 * Roccat KonePure is a smaller version of KoneXTD with less buttons and lights.
 */

#include <linux/types.h>
#include <linux/device.h>
#include <linux/input.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/hid-roccat.h>
#include "hid-ids.h"
#include "hid-roccat-common.h"

enum {
        KONEPURE_MOUSE_REPORT_NUMBER_BUTTON = 3,
};

struct konepure_mouse_report_button {
        uint8_t report_number; /* always KONEPURE_MOUSE_REPORT_NUMBER_BUTTON */
        uint8_t zero;
        uint8_t type;
        uint8_t data1;
        uint8_t data2;
        uint8_t zero2;
        uint8_t unknown[2];
} __packed;

ROCCAT_COMMON2_BIN_ATTRIBUTE_W(control, 0x04, 0x03);
ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(actual_profile, 0x05, 0x03);
ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(profile_settings, 0x06, 0x1f);
ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(profile_buttons, 0x07, 0x3b);
ROCCAT_COMMON2_BIN_ATTRIBUTE_W(macro, 0x08, 0x0822);
ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(info, 0x09, 0x06);
ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(tcu, 0x0c, 0x04);
ROCCAT_COMMON2_BIN_ATTRIBUTE_R(tcu_image, 0x0c, 0x0404);
ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(sensor, 0x0f, 0x06);
ROCCAT_COMMON2_BIN_ATTRIBUTE_W(talk, 0x10, 0x10);

static const struct bin_attribute *const konepure_bin_attrs[] = {
        &bin_attr_actual_profile,
        &bin_attr_control,
        &bin_attr_info,
        &bin_attr_talk,
        &bin_attr_macro,
        &bin_attr_sensor,
        &bin_attr_tcu,
        &bin_attr_tcu_image,
        &bin_attr_profile_settings,
        &bin_attr_profile_buttons,
        NULL,
};

static const struct attribute_group konepure_group = {
        .bin_attrs = konepure_bin_attrs,
};

static const struct attribute_group *konepure_groups[] = {
        &konepure_group,
        NULL,
};

static const struct class konepure_class = {
        .name = "konepure",
        .dev_groups = konepure_groups,
};

static int konepure_init_specials(struct hid_device *hdev)
{
        struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
        struct usb_device *usb_dev = interface_to_usbdev(intf);
        struct roccat_common2_device *konepure;
        int retval;

        if (intf->cur_altsetting->desc.bInterfaceProtocol
                        != USB_INTERFACE_PROTOCOL_MOUSE) {
                hid_set_drvdata(hdev, NULL);
                return 0;
        }

        konepure = kzalloc_obj(*konepure);
        if (!konepure) {
                hid_err(hdev, "can't alloc device descriptor\n");
                return -ENOMEM;
        }
        hid_set_drvdata(hdev, konepure);

        retval = roccat_common2_device_init_struct(usb_dev, konepure);
        if (retval) {
                hid_err(hdev, "couldn't init KonePure device\n");
                goto exit_free;
        }

        retval = roccat_connect(&konepure_class, hdev,
                                sizeof(struct konepure_mouse_report_button));
        if (retval < 0) {
                hid_err(hdev, "couldn't init char dev\n");
        } else {
                konepure->chrdev_minor = retval;
                konepure->roccat_claimed = 1;
        }

        return 0;
exit_free:
        kfree(konepure);
        return retval;
}

static void konepure_remove_specials(struct hid_device *hdev)
{
        struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
        struct roccat_common2_device *konepure;

        if (intf->cur_altsetting->desc.bInterfaceProtocol
                        != USB_INTERFACE_PROTOCOL_MOUSE)
                return;

        konepure = hid_get_drvdata(hdev);
        if (konepure->roccat_claimed)
                roccat_disconnect(konepure->chrdev_minor);
        kfree(konepure);
}

static int konepure_probe(struct hid_device *hdev,
                const struct hid_device_id *id)
{
        int retval;

        if (!hid_is_usb(hdev))
                return -EINVAL;

        retval = hid_parse(hdev);
        if (retval) {
                hid_err(hdev, "parse failed\n");
                goto exit;
        }

        retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
        if (retval) {
                hid_err(hdev, "hw start failed\n");
                goto exit;
        }

        retval = konepure_init_specials(hdev);
        if (retval) {
                hid_err(hdev, "couldn't install mouse\n");
                goto exit_stop;
        }

        return 0;

exit_stop:
        hid_hw_stop(hdev);
exit:
        return retval;
}

static void konepure_remove(struct hid_device *hdev)
{
        konepure_remove_specials(hdev);
        hid_hw_stop(hdev);
}

static int konepure_raw_event(struct hid_device *hdev,
                struct hid_report *report, u8 *data, int size)
{
        struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
        struct roccat_common2_device *konepure = hid_get_drvdata(hdev);

        if (intf->cur_altsetting->desc.bInterfaceProtocol
                        != USB_INTERFACE_PROTOCOL_MOUSE)
                return 0;

        if (data[0] != KONEPURE_MOUSE_REPORT_NUMBER_BUTTON)
                return 0;

        if (konepure != NULL && konepure->roccat_claimed)
                roccat_report_event(konepure->chrdev_minor, data);

        return 0;
}

static const struct hid_device_id konepure_devices[] = {
        { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONEPURE) },
        { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONEPURE_OPTICAL) },
        { }
};

MODULE_DEVICE_TABLE(hid, konepure_devices);

static struct hid_driver konepure_driver = {
                .name = "konepure",
                .id_table = konepure_devices,
                .probe = konepure_probe,
                .remove = konepure_remove,
                .raw_event = konepure_raw_event
};

static int __init konepure_init(void)
{
        int retval;

        retval = class_register(&konepure_class);
        if (retval)
                return retval;

        retval = hid_register_driver(&konepure_driver);
        if (retval)
                class_unregister(&konepure_class);
        return retval;
}

static void __exit konepure_exit(void)
{
        hid_unregister_driver(&konepure_driver);
        class_unregister(&konepure_class);
}

module_init(konepure_init);
module_exit(konepure_exit);

MODULE_AUTHOR("Stefan Achatz");
MODULE_DESCRIPTION("USB Roccat KonePure/Optical driver");
MODULE_LICENSE("GPL v2");