/*
   * Roccat Kova[+] driver for Linux
   *
   * Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net>
   */
  
  /*
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License as published by the Free
   * Software Foundation; either version 2 of the License, or (at your option)
   * any later version.
   */
  
  /*
   * Roccat Kova[+] is a bigger version of the Pyra with two more side buttons.
   */
  
  #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"
  #include "hid-roccat-kovaplus.h"
  
  static uint profile_numbers[5] = {0, 1, 2, 3, 4};
  
  static struct class *kovaplus_class;
  
  static uint kovaplus_convert_event_cpi(uint value)
  {
  	return (value == 7 ? 4 : (value == 4 ? 3 : value));
  }
  
  static void kovaplus_profile_activated(struct kovaplus_device *kovaplus,
  		uint new_profile_index)
  {
  	kovaplus->actual_profile = new_profile_index;
  	kovaplus->actual_cpi = kovaplus->profile_settings[new_profile_index].cpi_startup_level;
  	kovaplus->actual_x_sensitivity = kovaplus->profile_settings[new_profile_index].sensitivity_x;
  	kovaplus->actual_y_sensitivity = kovaplus->profile_settings[new_profile_index].sensitivity_y;
  }
  
  static int kovaplus_send_control(struct usb_device *usb_dev, uint value,
  		enum kovaplus_control_requests request)
  {
  	int retval;
  	struct roccat_common2_control control;
  
  	if ((request == KOVAPLUS_CONTROL_REQUEST_PROFILE_SETTINGS ||
  			request == KOVAPLUS_CONTROL_REQUEST_PROFILE_BUTTONS) &&
  			value > 4)
  		return -EINVAL;
  
  	control.command = ROCCAT_COMMON_COMMAND_CONTROL;
  	control.value = value;
  	control.request = request;
  
  	retval = roccat_common2_send(usb_dev, ROCCAT_COMMON_COMMAND_CONTROL,
  			&control, sizeof(struct roccat_common2_control));
  
  	return retval;
  }
  
  static int kovaplus_select_profile(struct usb_device *usb_dev, uint number,
  		enum kovaplus_control_requests request)
  {
  	return kovaplus_send_control(usb_dev, number, request);
  }
  
  static int kovaplus_get_profile_settings(struct usb_device *usb_dev,
  		struct kovaplus_profile_settings *buf, uint number)
  {
  	int retval;
  
  	retval = kovaplus_select_profile(usb_dev, number,
  			KOVAPLUS_CONTROL_REQUEST_PROFILE_SETTINGS);
  	if (retval)
  		return retval;
  
  	return roccat_common2_receive(usb_dev, KOVAPLUS_COMMAND_PROFILE_SETTINGS,
  			buf, KOVAPLUS_SIZE_PROFILE_SETTINGS);
  }
  
  static int kovaplus_get_profile_buttons(struct usb_device *usb_dev,
  		struct kovaplus_profile_buttons *buf, int number)
  {
  	int retval;
  
  	retval = kovaplus_select_profile(usb_dev, number,
  			KOVAPLUS_CONTROL_REQUEST_PROFILE_BUTTONS);
  	if (retval)
  		return retval;
  
  	return roccat_common2_receive(usb_dev, KOVAPLUS_COMMAND_PROFILE_BUTTONS,
  			buf, KOVAPLUS_SIZE_PROFILE_BUTTONS);
  }
  
  /* retval is 0-4 on success, < 0 on error */
  static int kovaplus_get_actual_profile(struct usb_device *usb_dev)
  {
  	struct kovaplus_actual_profile buf;
  	int retval;
  
  	retval = roccat_common2_receive(usb_dev, KOVAPLUS_COMMAND_ACTUAL_PROFILE,
  			&buf, sizeof(struct kovaplus_actual_profile));
  
  	return retval ? retval : buf.actual_profile;
  }
  
  static int kovaplus_set_actual_profile(struct usb_device *usb_dev,
  		int new_profile)
  {
  	struct kovaplus_actual_profile buf;
  
  	buf.command = KOVAPLUS_COMMAND_ACTUAL_PROFILE;
  	buf.size = sizeof(struct kovaplus_actual_profile);
  	buf.actual_profile = new_profile;
  
  	return roccat_common2_send_with_status(usb_dev,
  			KOVAPLUS_COMMAND_ACTUAL_PROFILE,
  			&buf, sizeof(struct kovaplus_actual_profile));
  }
  
  static ssize_t kovaplus_sysfs_read(struct file *fp, struct kobject *kobj,
  		char *buf, loff_t off, size_t count,
  		size_t real_size, uint command)
  {
  	struct device *dev =
  			container_of(kobj, struct device, kobj)->parent->parent;
  	struct kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
  	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
  	int retval;
  
  	if (off >= real_size)
  		return 0;
  
  	if (off != 0 || count != real_size)
  		return -EINVAL;
  
  	mutex_lock(&kovaplus->kovaplus_lock);
  	retval = roccat_common2_receive(usb_dev, command, buf, real_size);
  	mutex_unlock(&kovaplus->kovaplus_lock);
  
  	if (retval)
  		return retval;
  
  	return real_size;
  }
  
  static ssize_t kovaplus_sysfs_write(struct file *fp, struct kobject *kobj,
  		void const *buf, loff_t off, size_t count,
  		size_t real_size, uint command)
  {
  	struct device *dev =
  			container_of(kobj, struct device, kobj)->parent->parent;
  	struct kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
  	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
  	int retval;
  
  	if (off != 0 || count != real_size)
  		return -EINVAL;
  
  	mutex_lock(&kovaplus->kovaplus_lock);
  	retval = roccat_common2_send_with_status(usb_dev, command,
  			buf, real_size);
  	mutex_unlock(&kovaplus->kovaplus_lock);
  
  	if (retval)
  		return retval;
  
  	return real_size;
  }
  
  #define KOVAPLUS_SYSFS_W(thingy, THINGY) \
  static ssize_t kovaplus_sysfs_write_ ## thingy(struct file *fp, \
  		struct kobject *kobj, struct bin_attribute *attr, char *buf, \
  		loff_t off, size_t count) \
  { \
  	return kovaplus_sysfs_write(fp, kobj, buf, off, count, \
  			KOVAPLUS_SIZE_ ## THINGY, KOVAPLUS_COMMAND_ ## THINGY); \
  }
  
  #define KOVAPLUS_SYSFS_R(thingy, THINGY) \
  static ssize_t kovaplus_sysfs_read_ ## thingy(struct file *fp, \
  		struct kobject *kobj, struct bin_attribute *attr, char *buf, \
  		loff_t off, size_t count) \
  { \
  	return kovaplus_sysfs_read(fp, kobj, buf, off, count, \
  			KOVAPLUS_SIZE_ ## THINGY, KOVAPLUS_COMMAND_ ## THINGY); \
  }
  
  #define KOVAPLUS_SYSFS_RW(thingy, THINGY) \
  KOVAPLUS_SYSFS_W(thingy, THINGY) \
  KOVAPLUS_SYSFS_R(thingy, THINGY)
  
  #define KOVAPLUS_BIN_ATTRIBUTE_RW(thingy, THINGY) \
  KOVAPLUS_SYSFS_RW(thingy, THINGY); \
  static struct bin_attribute bin_attr_##thingy = { \
  	.attr = { .name = #thingy, .mode = 0660 }, \
  	.size = KOVAPLUS_SIZE_ ## THINGY, \
  	.read = kovaplus_sysfs_read_ ## thingy, \
  	.write = kovaplus_sysfs_write_ ## thingy \
  }
  
  #define KOVAPLUS_BIN_ATTRIBUTE_W(thingy, THINGY) \
  KOVAPLUS_SYSFS_W(thingy, THINGY); \
  static struct bin_attribute bin_attr_##thingy = { \
  	.attr = { .name = #thingy, .mode = 0220 }, \
  	.size = KOVAPLUS_SIZE_ ## THINGY, \
  	.write = kovaplus_sysfs_write_ ## thingy \
  }
  KOVAPLUS_BIN_ATTRIBUTE_W(control, CONTROL);
  KOVAPLUS_BIN_ATTRIBUTE_RW(info, INFO);
  KOVAPLUS_BIN_ATTRIBUTE_RW(profile_settings, PROFILE_SETTINGS);
  KOVAPLUS_BIN_ATTRIBUTE_RW(profile_buttons, PROFILE_BUTTONS);
  
  static ssize_t kovaplus_sysfs_read_profilex_settings(struct file *fp,
  		struct kobject *kobj, struct bin_attribute *attr, char *buf,
  		loff_t off, size_t count)
  {
  	struct device *dev =
  			container_of(kobj, struct device, kobj)->parent->parent;
  	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
  	ssize_t retval;
  
  	retval = kovaplus_select_profile(usb_dev, *(uint *)(attr->private),
  			KOVAPLUS_CONTROL_REQUEST_PROFILE_SETTINGS);
  	if (retval)
  		return retval;
  
  	return kovaplus_sysfs_read(fp, kobj, buf, off, count,
  			KOVAPLUS_SIZE_PROFILE_SETTINGS,
  			KOVAPLUS_COMMAND_PROFILE_SETTINGS);
  }
  
  static ssize_t kovaplus_sysfs_read_profilex_buttons(struct file *fp,
  		struct kobject *kobj, struct bin_attribute *attr, char *buf,
  		loff_t off, size_t count)
  {
  	struct device *dev =
  			container_of(kobj, struct device, kobj)->parent->parent;
  	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
  	ssize_t retval;
  
  	retval = kovaplus_select_profile(usb_dev, *(uint *)(attr->private),
  			KOVAPLUS_CONTROL_REQUEST_PROFILE_BUTTONS);
  	if (retval)
  		return retval;
  
  	return kovaplus_sysfs_read(fp, kobj, buf, off, count,
  			KOVAPLUS_SIZE_PROFILE_BUTTONS,
  			KOVAPLUS_COMMAND_PROFILE_BUTTONS);
  }
  
  #define PROFILE_ATTR(number)						\
  static struct bin_attribute bin_attr_profile##number##_settings = {	\
  	.attr = { .name = "profile" #number "_settings", .mode = 0440 },	\
  	.size = KOVAPLUS_SIZE_PROFILE_SETTINGS,				\
  	.read = kovaplus_sysfs_read_profilex_settings,			\
  	.private = &profile_numbers[number-1],				\
  };									\
  static struct bin_attribute bin_attr_profile##number##_buttons = {	\
  	.attr = { .name = "profile" #number "_buttons", .mode = 0440 },	\
  	.size = KOVAPLUS_SIZE_PROFILE_BUTTONS,				\
  	.read = kovaplus_sysfs_read_profilex_buttons,			\
  	.private = &profile_numbers[number-1],				\
  };
  PROFILE_ATTR(1);
  PROFILE_ATTR(2);
  PROFILE_ATTR(3);
  PROFILE_ATTR(4);
  PROFILE_ATTR(5);
  
  static ssize_t kovaplus_sysfs_show_actual_profile(struct device *dev,
  		struct device_attribute *attr, char *buf)
  {
  	struct kovaplus_device *kovaplus =
  			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
  	return snprintf(buf, PAGE_SIZE, "%d
  ", kovaplus->actual_profile);
  }
  
  static ssize_t kovaplus_sysfs_set_actual_profile(struct device *dev,
  		struct device_attribute *attr, char const *buf, size_t size)
  {
  	struct kovaplus_device *kovaplus;
  	struct usb_device *usb_dev;
  	unsigned long profile;
  	int retval;
  	struct kovaplus_roccat_report roccat_report;
  
  	dev = dev->parent->parent;
  	kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
  	usb_dev = interface_to_usbdev(to_usb_interface(dev));
  
  	retval = kstrtoul(buf, 10, &profile);
  	if (retval)
  		return retval;
  
  	if (profile >= 5)
  		return -EINVAL;
  
  	mutex_lock(&kovaplus->kovaplus_lock);
  	retval = kovaplus_set_actual_profile(usb_dev, profile);
  	if (retval) {
  		mutex_unlock(&kovaplus->kovaplus_lock);
  		return retval;
  	}
  
  	kovaplus_profile_activated(kovaplus, profile);
  
  	roccat_report.type = KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_PROFILE_1;
  	roccat_report.profile = profile + 1;
  	roccat_report.button = 0;
  	roccat_report.data1 = profile + 1;
  	roccat_report.data2 = 0;
  	roccat_report_event(kovaplus->chrdev_minor,
  			(uint8_t const *)&roccat_report);
  
  	mutex_unlock(&kovaplus->kovaplus_lock);
  
  	return size;
  }
  static DEVICE_ATTR(actual_profile, 0660,
  		   kovaplus_sysfs_show_actual_profile,
  		   kovaplus_sysfs_set_actual_profile);
  
  static ssize_t kovaplus_sysfs_show_actual_cpi(struct device *dev,
  		struct device_attribute *attr, char *buf)
  {
  	struct kovaplus_device *kovaplus =
  			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
  	return snprintf(buf, PAGE_SIZE, "%d
  ", kovaplus->actual_cpi);
  }
  static DEVICE_ATTR(actual_cpi, 0440, kovaplus_sysfs_show_actual_cpi, NULL);
  
  static ssize_t kovaplus_sysfs_show_actual_sensitivity_x(struct device *dev,
  		struct device_attribute *attr, char *buf)
  {
  	struct kovaplus_device *kovaplus =
  			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
  	return snprintf(buf, PAGE_SIZE, "%d
  ", kovaplus->actual_x_sensitivity);
  }
  static DEVICE_ATTR(actual_sensitivity_x, 0440,
  		   kovaplus_sysfs_show_actual_sensitivity_x, NULL);
  
  static ssize_t kovaplus_sysfs_show_actual_sensitivity_y(struct device *dev,
  		struct device_attribute *attr, char *buf)
  {
  	struct kovaplus_device *kovaplus =
  			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
  	return snprintf(buf, PAGE_SIZE, "%d
  ", kovaplus->actual_y_sensitivity);
  }
  static DEVICE_ATTR(actual_sensitivity_y, 0440,
  		   kovaplus_sysfs_show_actual_sensitivity_y, NULL);
  
  static ssize_t kovaplus_sysfs_show_firmware_version(struct device *dev,
  		struct device_attribute *attr, char *buf)
  {
  	struct kovaplus_device *kovaplus;
  	struct usb_device *usb_dev;
  	struct kovaplus_info info;
  
  	dev = dev->parent->parent;
  	kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
  	usb_dev = interface_to_usbdev(to_usb_interface(dev));
  
  	mutex_lock(&kovaplus->kovaplus_lock);
  	roccat_common2_receive(usb_dev, KOVAPLUS_COMMAND_INFO,
  			&info, KOVAPLUS_SIZE_INFO);
  	mutex_unlock(&kovaplus->kovaplus_lock);
  
  	return snprintf(buf, PAGE_SIZE, "%d
  ", info.firmware_version);
  }
  static DEVICE_ATTR(firmware_version, 0440,
  		   kovaplus_sysfs_show_firmware_version, NULL);
  
  static struct attribute *kovaplus_attrs[] = {
  	&dev_attr_actual_cpi.attr,
  	&dev_attr_firmware_version.attr,
  	&dev_attr_actual_profile.attr,
  	&dev_attr_actual_sensitivity_x.attr,
  	&dev_attr_actual_sensitivity_y.attr,
  	NULL,
  };
  
  static struct bin_attribute *kovaplus_bin_attributes[] = {
  	&bin_attr_control,
  	&bin_attr_info,
  	&bin_attr_profile_settings,
  	&bin_attr_profile_buttons,
  	&bin_attr_profile1_settings,
  	&bin_attr_profile2_settings,
  	&bin_attr_profile3_settings,
  	&bin_attr_profile4_settings,
  	&bin_attr_profile5_settings,
  	&bin_attr_profile1_buttons,
  	&bin_attr_profile2_buttons,
  	&bin_attr_profile3_buttons,
  	&bin_attr_profile4_buttons,
  	&bin_attr_profile5_buttons,
  	NULL,
  };
  
  static const struct attribute_group kovaplus_group = {
  	.attrs = kovaplus_attrs,
  	.bin_attrs = kovaplus_bin_attributes,
  };
  
  static const struct attribute_group *kovaplus_groups[] = {
  	&kovaplus_group,
  	NULL,
  };
  
  static int kovaplus_init_kovaplus_device_struct(struct usb_device *usb_dev,
  		struct kovaplus_device *kovaplus)
  {
  	int retval, i;
  	static uint wait = 70; /* device will freeze with just 60 */
  
  	mutex_init(&kovaplus->kovaplus_lock);
  
  	for (i = 0; i < 5; ++i) {
  		msleep(wait);
  		retval = kovaplus_get_profile_settings(usb_dev,
  				&kovaplus->profile_settings[i], i);
  		if (retval)
  			return retval;
  
  		msleep(wait);
  		retval = kovaplus_get_profile_buttons(usb_dev,
  				&kovaplus->profile_buttons[i], i);
  		if (retval)
  			return retval;
  	}
  
  	msleep(wait);
  	retval = kovaplus_get_actual_profile(usb_dev);
  	if (retval < 0)
  		return retval;
  	kovaplus_profile_activated(kovaplus, retval);
  
  	return 0;
  }
  
  static int kovaplus_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 kovaplus_device *kovaplus;
  	int retval;
  
  	if (intf->cur_altsetting->desc.bInterfaceProtocol
  			== USB_INTERFACE_PROTOCOL_MOUSE) {
  
  		kovaplus = kzalloc(sizeof(*kovaplus), GFP_KERNEL);
  		if (!kovaplus) {
  			hid_err(hdev, "can't alloc device descriptor
  ");
  			return -ENOMEM;
  		}
  		hid_set_drvdata(hdev, kovaplus);
  
  		retval = kovaplus_init_kovaplus_device_struct(usb_dev, kovaplus);
  		if (retval) {
  			hid_err(hdev, "couldn't init struct kovaplus_device
  ");
  			goto exit_free;
  		}
  
  		retval = roccat_connect(kovaplus_class, hdev,
  				sizeof(struct kovaplus_roccat_report));
  		if (retval < 0) {
  			hid_err(hdev, "couldn't init char dev
  ");
  		} else {
  			kovaplus->chrdev_minor = retval;
  			kovaplus->roccat_claimed = 1;
  		}
  
  	} else {
  		hid_set_drvdata(hdev, NULL);
  	}
  
  	return 0;
  exit_free:
  	kfree(kovaplus);
  	return retval;
  }
  
  static void kovaplus_remove_specials(struct hid_device *hdev)
  {
  	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
  	struct kovaplus_device *kovaplus;
  
  	if (intf->cur_altsetting->desc.bInterfaceProtocol
  			== USB_INTERFACE_PROTOCOL_MOUSE) {
  		kovaplus = hid_get_drvdata(hdev);
  		if (kovaplus->roccat_claimed)
  			roccat_disconnect(kovaplus->chrdev_minor);
  		kfree(kovaplus);
  	}
  }
  
  static int kovaplus_probe(struct hid_device *hdev,
  		const struct hid_device_id *id)
  {
  	int retval;
  
  	retval = hid_parse(hdev);
  	if (retval) {
  		hid_err(hdev, "parse failed
  ");
  		goto exit;
  	}
  
  	retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
  	if (retval) {
  		hid_err(hdev, "hw start failed
  ");
  		goto exit;
  	}
  
  	retval = kovaplus_init_specials(hdev);
  	if (retval) {
  		hid_err(hdev, "couldn't install mouse
  ");
  		goto exit_stop;
  	}
  
  	return 0;
  
  exit_stop:
  	hid_hw_stop(hdev);
  exit:
  	return retval;
  }
  
  static void kovaplus_remove(struct hid_device *hdev)
  {
  	kovaplus_remove_specials(hdev);
  	hid_hw_stop(hdev);
  }
  
  static void kovaplus_keep_values_up_to_date(struct kovaplus_device *kovaplus,
  		u8 const *data)
  {
  	struct kovaplus_mouse_report_button const *button_report;
  
  	if (data[0] != KOVAPLUS_MOUSE_REPORT_NUMBER_BUTTON)
  		return;
  
  	button_report = (struct kovaplus_mouse_report_button const *)data;
  
  	switch (button_report->type) {
  	case KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_PROFILE_1:
  		kovaplus_profile_activated(kovaplus, button_report->data1 - 1);
  		break;
  	case KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_CPI:
  		kovaplus->actual_cpi = kovaplus_convert_event_cpi(button_report->data1);
  		break;
  	case KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_SENSITIVITY:
  		kovaplus->actual_x_sensitivity = button_report->data1;
  		kovaplus->actual_y_sensitivity = button_report->data2;
  		break;
  	default:
  		break;
  	}
  }
  
  static void kovaplus_report_to_chrdev(struct kovaplus_device const *kovaplus,
  		u8 const *data)
  {
  	struct kovaplus_roccat_report roccat_report;
  	struct kovaplus_mouse_report_button const *button_report;
  
  	if (data[0] != KOVAPLUS_MOUSE_REPORT_NUMBER_BUTTON)
  		return;
  
  	button_report = (struct kovaplus_mouse_report_button const *)data;
  
  	if (button_report->type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_PROFILE_2)
  		return;
  
  	roccat_report.type = button_report->type;
  	roccat_report.profile = kovaplus->actual_profile + 1;
  
  	if (roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_MACRO ||
  			roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_SHORTCUT ||
  			roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_QUICKLAUNCH ||
  			roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_TIMER)
  		roccat_report.button = button_report->data1;
  	else
  		roccat_report.button = 0;
  
  	if (roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_CPI)
  		roccat_report.data1 = kovaplus_convert_event_cpi(button_report->data1);
  	else
  		roccat_report.data1 = button_report->data1;
  
  	roccat_report.data2 = button_report->data2;
  
  	roccat_report_event(kovaplus->chrdev_minor,
  			(uint8_t const *)&roccat_report);
  }
  
  static int kovaplus_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 kovaplus_device *kovaplus = hid_get_drvdata(hdev);
  
  	if (intf->cur_altsetting->desc.bInterfaceProtocol
  			!= USB_INTERFACE_PROTOCOL_MOUSE)
  		return 0;
  
  	if (kovaplus == NULL)
  		return 0;
  
  	kovaplus_keep_values_up_to_date(kovaplus, data);
  
  	if (kovaplus->roccat_claimed)
  		kovaplus_report_to_chrdev(kovaplus, data);
  
  	return 0;
  }
  
  static const struct hid_device_id kovaplus_devices[] = {
  	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KOVAPLUS) },
  	{ }
  };
  
  MODULE_DEVICE_TABLE(hid, kovaplus_devices);
  
  static struct hid_driver kovaplus_driver = {
  		.name = "kovaplus",
  		.id_table = kovaplus_devices,
  		.probe = kovaplus_probe,
  		.remove = kovaplus_remove,
  		.raw_event = kovaplus_raw_event
  };
  
  static int __init kovaplus_init(void)
  {
  	int retval;
  
  	kovaplus_class = class_create(THIS_MODULE, "kovaplus");
  	if (IS_ERR(kovaplus_class))
  		return PTR_ERR(kovaplus_class);
  	kovaplus_class->dev_groups = kovaplus_groups;
  
  	retval = hid_register_driver(&kovaplus_driver);
  	if (retval)
  		class_destroy(kovaplus_class);
  	return retval;
  }
  
  static void __exit kovaplus_exit(void)
  {
  	hid_unregister_driver(&kovaplus_driver);
  	class_destroy(kovaplus_class);
  }
  
  module_init(kovaplus_init);
  module_exit(kovaplus_exit);
  
  MODULE_AUTHOR("Stefan Achatz");
  MODULE_DESCRIPTION("USB Roccat Kova[+] driver");
  MODULE_LICENSE("GPL v2");