drivers/hid/hid-roccat-kovaplus.c - fp2-dev/kernel/msm - Gitiles

 /*
  * 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 kovaplus_control control;

 	if ((request == KOVAPLUS_CONTROL_REQUEST_PROFILE_SETTINGS ||
 			request == KOVAPLUS_CONTROL_REQUEST_PROFILE_BUTTONS) &&
 			value > 4)
 		return -EINVAL;

 	control.command = KOVAPLUS_COMMAND_CONTROL;
 	control.value = value;
 	control.request = request;

 	retval = roccat_common_send(usb_dev, KOVAPLUS_USB_COMMAND_CONTROL,
 			&control, sizeof(struct kovaplus_control));

 	return retval;
 }

 static int kovaplus_receive_control_status(struct usb_device *usb_dev)
 {
 	int retval;
 	struct kovaplus_control control;

 	do {
 		retval = roccat_common_receive(usb_dev, KOVAPLUS_USB_COMMAND_CONTROL,
 				&control, sizeof(struct kovaplus_control));

 		/* check if we get a completely wrong answer */
 		if (retval)
 			return retval;

 		if (control.value == KOVAPLUS_CONTROL_REQUEST_STATUS_OK)
 			return 0;

 		/* indicates that hardware needs some more time to complete action */
 		if (control.value == KOVAPLUS_CONTROL_REQUEST_STATUS_WAIT) {
 			msleep(500); /* windows driver uses 1000 */
 			continue;
 		}

 		/* seems to be critical - replug necessary */
 		if (control.value == KOVAPLUS_CONTROL_REQUEST_STATUS_OVERLOAD)
 			return -EINVAL;

 		hid_err(usb_dev, "kovaplus_receive_control_status: "
 				"unknown response value 0x%x\n", control.value);
 		return -EINVAL;
 	} while (1);
 }

 static int kovaplus_send(struct usb_device *usb_dev, uint command,
 		void const *buf, uint size)
 {
 	int retval;

 	retval = roccat_common_send(usb_dev, command, buf, size);
 	if (retval)
 		return retval;

 	msleep(100);

 	return kovaplus_receive_control_status(usb_dev);
 }

 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_info(struct usb_device *usb_dev,
 		struct kovaplus_info *buf)
 {
 	return roccat_common_receive(usb_dev, KOVAPLUS_USB_COMMAND_INFO,
 			buf, sizeof(struct kovaplus_info));
 }

 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_common_receive(usb_dev, KOVAPLUS_USB_COMMAND_PROFILE_SETTINGS,
 			buf, sizeof(struct kovaplus_profile_settings));
 }

 static int kovaplus_set_profile_settings(struct usb_device *usb_dev,
 		struct kovaplus_profile_settings const *settings)
 {
 	return kovaplus_send(usb_dev, KOVAPLUS_USB_COMMAND_PROFILE_SETTINGS,
 			settings, sizeof(struct kovaplus_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_common_receive(usb_dev, KOVAPLUS_USB_COMMAND_PROFILE_BUTTONS,
 			buf, sizeof(struct kovaplus_profile_buttons));
 }

 static int kovaplus_set_profile_buttons(struct usb_device *usb_dev,
 		struct kovaplus_profile_buttons const *buttons)
 {
 	return kovaplus_send(usb_dev, KOVAPLUS_USB_COMMAND_PROFILE_BUTTONS,
 			buttons, sizeof(struct kovaplus_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_common_receive(usb_dev, KOVAPLUS_USB_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 kovaplus_send(usb_dev, KOVAPLUS_USB_COMMAND_ACTUAL_PROFILE,
 			&buf, sizeof(struct kovaplus_actual_profile));
 }

 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 kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));

 	if (off >= sizeof(struct kovaplus_profile_settings))
 		return 0;

 	if (off + count > sizeof(struct kovaplus_profile_settings))
 		count = sizeof(struct kovaplus_profile_settings) - off;

 	mutex_lock(&kovaplus->kovaplus_lock);
 	memcpy(buf, ((char const *)&kovaplus->profile_settings[*(uint *)(attr->private)]) + off,
 			count);
 	mutex_unlock(&kovaplus->kovaplus_lock);

 	return count;
 }

 static ssize_t kovaplus_sysfs_write_profile_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 kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
 	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 	int retval = 0;
 	int difference;
 	int profile_index;
 	struct kovaplus_profile_settings *profile_settings;

 	if (off != 0 || count != sizeof(struct kovaplus_profile_settings))
 		return -EINVAL;

 	profile_index = ((struct kovaplus_profile_settings const *)buf)->profile_index;
 	profile_settings = &kovaplus->profile_settings[profile_index];

 	mutex_lock(&kovaplus->kovaplus_lock);
 	difference = memcmp(buf, profile_settings,
 			sizeof(struct kovaplus_profile_settings));
 	if (difference) {
 		retval = kovaplus_set_profile_settings(usb_dev,
 				(struct kovaplus_profile_settings const *)buf);
 		if (!retval)
 			memcpy(profile_settings, buf,
 					sizeof(struct kovaplus_profile_settings));
 	}
 	mutex_unlock(&kovaplus->kovaplus_lock);

 	if (retval)
 		return retval;

 	return sizeof(struct kovaplus_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 kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));

 	if (off >= sizeof(struct kovaplus_profile_buttons))
 		return 0;

 	if (off + count > sizeof(struct kovaplus_profile_buttons))
 		count = sizeof(struct kovaplus_profile_buttons) - off;

 	mutex_lock(&kovaplus->kovaplus_lock);
 	memcpy(buf, ((char const *)&kovaplus->profile_buttons[*(uint *)(attr->private)]) + off,
 			count);
 	mutex_unlock(&kovaplus->kovaplus_lock);

 	return count;
 }

 static ssize_t kovaplus_sysfs_write_profile_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 kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
 	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 	int retval = 0;
 	int difference;
 	uint profile_index;
 	struct kovaplus_profile_buttons *profile_buttons;

 	if (off != 0 || count != sizeof(struct kovaplus_profile_buttons))
 		return -EINVAL;

 	profile_index = ((struct kovaplus_profile_buttons const *)buf)->profile_index;
 	profile_buttons = &kovaplus->profile_buttons[profile_index];

 	mutex_lock(&kovaplus->kovaplus_lock);
 	difference = memcmp(buf, profile_buttons,
 			sizeof(struct kovaplus_profile_buttons));
 	if (difference) {
 		retval = kovaplus_set_profile_buttons(usb_dev,
 				(struct kovaplus_profile_buttons const *)buf);
 		if (!retval)
 			memcpy(profile_buttons, buf,
 					sizeof(struct kovaplus_profile_buttons));
 	}
 	mutex_unlock(&kovaplus->kovaplus_lock);

 	if (retval)
 		return retval;

 	return sizeof(struct kovaplus_profile_buttons);
 }

 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\n", 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;

 	dev = dev->parent->parent;
 	kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
 	usb_dev = interface_to_usbdev(to_usb_interface(dev));

 	retval = strict_strtoul(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);
 	kovaplus->actual_profile = profile;
 	mutex_unlock(&kovaplus->kovaplus_lock);
 	if (retval)
 		return retval;

 	return size;
 }

 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\n", kovaplus->actual_cpi);
 }

 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\n", kovaplus->actual_x_sensitivity);
 }

 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\n", kovaplus->actual_y_sensitivity);
 }

 static ssize_t kovaplus_sysfs_show_firmware_version(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\n", kovaplus->info.firmware_version);
 }

 static struct device_attribute kovaplus_attributes[] = {
 	__ATTR(actual_cpi, 0440,
 		kovaplus_sysfs_show_actual_cpi, NULL),
 	__ATTR(firmware_version, 0440,
 		kovaplus_sysfs_show_firmware_version, NULL),
 	__ATTR(actual_profile, 0660,
 		kovaplus_sysfs_show_actual_profile,
 		kovaplus_sysfs_set_actual_profile),
 	__ATTR(actual_sensitivity_x, 0440,
 		kovaplus_sysfs_show_actual_sensitivity_x, NULL),
 	__ATTR(actual_sensitivity_y, 0440,
 		kovaplus_sysfs_show_actual_sensitivity_y, NULL),
 	__ATTR_NULL
 };

 static struct bin_attribute kovaplus_bin_attributes[] = {
 	{
 		.attr = { .name = "profile_settings", .mode = 0220 },
 		.size = sizeof(struct kovaplus_profile_settings),
 		.write = kovaplus_sysfs_write_profile_settings
 	},
 	{
 		.attr = { .name = "profile1_settings", .mode = 0440 },
 		.size = sizeof(struct kovaplus_profile_settings),
 		.read = kovaplus_sysfs_read_profilex_settings,
 		.private = &profile_numbers[0]
 	},
 	{
 		.attr = { .name = "profile2_settings", .mode = 0440 },
 		.size = sizeof(struct kovaplus_profile_settings),
 		.read = kovaplus_sysfs_read_profilex_settings,
 		.private = &profile_numbers[1]
 	},
 	{
 		.attr = { .name = "profile3_settings", .mode = 0440 },
 		.size = sizeof(struct kovaplus_profile_settings),
 		.read = kovaplus_sysfs_read_profilex_settings,
 		.private = &profile_numbers[2]
 	},
 	{
 		.attr = { .name = "profile4_settings", .mode = 0440 },
 		.size = sizeof(struct kovaplus_profile_settings),
 		.read = kovaplus_sysfs_read_profilex_settings,
 		.private = &profile_numbers[3]
 	},
 	{
 		.attr = { .name = "profile5_settings", .mode = 0440 },
 		.size = sizeof(struct kovaplus_profile_settings),
 		.read = kovaplus_sysfs_read_profilex_settings,
 		.private = &profile_numbers[4]
 	},
 	{
 		.attr = { .name = "profile_buttons", .mode = 0220 },
 		.size = sizeof(struct kovaplus_profile_buttons),
 		.write = kovaplus_sysfs_write_profile_buttons
 	},
 	{
 		.attr = { .name = "profile1_buttons", .mode = 0440 },
 		.size = sizeof(struct kovaplus_profile_buttons),
 		.read = kovaplus_sysfs_read_profilex_buttons,
 		.private = &profile_numbers[0]
 	},
 	{
 		.attr = { .name = "profile2_buttons", .mode = 0440 },
 		.size = sizeof(struct kovaplus_profile_buttons),
 		.read = kovaplus_sysfs_read_profilex_buttons,
 		.private = &profile_numbers[1]
 	},
 	{
 		.attr = { .name = "profile3_buttons", .mode = 0440 },
 		.size = sizeof(struct kovaplus_profile_buttons),
 		.read = kovaplus_sysfs_read_profilex_buttons,
 		.private = &profile_numbers[2]
 	},
 	{
 		.attr = { .name = "profile4_buttons", .mode = 0440 },
 		.size = sizeof(struct kovaplus_profile_buttons),
 		.read = kovaplus_sysfs_read_profilex_buttons,
 		.private = &profile_numbers[3]
 	},
 	{
 		.attr = { .name = "profile5_buttons", .mode = 0440 },
 		.size = sizeof(struct kovaplus_profile_buttons),
 		.read = kovaplus_sysfs_read_profilex_buttons,
 		.private = &profile_numbers[4]
 	},
 	__ATTR_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);

 	retval = kovaplus_get_info(usb_dev, &kovaplus->info);
 	if (retval)
 		return retval;

 	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\n");
 			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\n");
 			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\n");
 		} 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\n");
 		goto exit;
 	}

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

 	retval = kovaplus_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 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);
 	case KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_SENSITIVITY:
 		kovaplus->actual_x_sensitivity = button_report->data1;
 		kovaplus->actual_y_sensitivity = button_report->data2;
 	}
 }

 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;

 	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_attrs = kovaplus_attributes;
 	kovaplus_class->dev_bin_attrs = kovaplus_bin_attributes;

 	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");
	/*
	* 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 kovaplus_control control;

	if ((request == KOVAPLUS_CONTROL_REQUEST_PROFILE_SETTINGS \|\|
	request == KOVAPLUS_CONTROL_REQUEST_PROFILE_BUTTONS) &&
	value > 4)
	return -EINVAL;

	control.command = KOVAPLUS_COMMAND_CONTROL;
	control.value = value;
	control.request = request;

	retval = roccat_common_send(usb_dev, KOVAPLUS_USB_COMMAND_CONTROL,
	&control, sizeof(struct kovaplus_control));

	return retval;
	}

	static int kovaplus_receive_control_status(struct usb_device *usb_dev)
	{
	int retval;
	struct kovaplus_control control;

	do {
	retval = roccat_common_receive(usb_dev, KOVAPLUS_USB_COMMAND_CONTROL,
	&control, sizeof(struct kovaplus_control));

	/* check if we get a completely wrong answer */
	if (retval)
	return retval;

	if (control.value == KOVAPLUS_CONTROL_REQUEST_STATUS_OK)
	return 0;

	/* indicates that hardware needs some more time to complete action */
	if (control.value == KOVAPLUS_CONTROL_REQUEST_STATUS_WAIT) {
	msleep(500); /* windows driver uses 1000 */
	continue;
	}

	/* seems to be critical - replug necessary */
	if (control.value == KOVAPLUS_CONTROL_REQUEST_STATUS_OVERLOAD)
	return -EINVAL;

	hid_err(usb_dev, "kovaplus_receive_control_status: "
	"unknown response value 0x%x\n", control.value);
	return -EINVAL;
	} while (1);
	}

	static int kovaplus_send(struct usb_device *usb_dev, uint command,
	void const *buf, uint size)
	{
	int retval;

	retval = roccat_common_send(usb_dev, command, buf, size);
	if (retval)
	return retval;

	msleep(100);

	return kovaplus_receive_control_status(usb_dev);
	}

	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_info(struct usb_device *usb_dev,
	struct kovaplus_info *buf)
	{
	return roccat_common_receive(usb_dev, KOVAPLUS_USB_COMMAND_INFO,
	buf, sizeof(struct kovaplus_info));
	}

	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_common_receive(usb_dev, KOVAPLUS_USB_COMMAND_PROFILE_SETTINGS,
	buf, sizeof(struct kovaplus_profile_settings));
	}

	static int kovaplus_set_profile_settings(struct usb_device *usb_dev,
	struct kovaplus_profile_settings const *settings)
	{
	return kovaplus_send(usb_dev, KOVAPLUS_USB_COMMAND_PROFILE_SETTINGS,
	settings, sizeof(struct kovaplus_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_common_receive(usb_dev, KOVAPLUS_USB_COMMAND_PROFILE_BUTTONS,
	buf, sizeof(struct kovaplus_profile_buttons));
	}

	static int kovaplus_set_profile_buttons(struct usb_device *usb_dev,
	struct kovaplus_profile_buttons const *buttons)
	{
	return kovaplus_send(usb_dev, KOVAPLUS_USB_COMMAND_PROFILE_BUTTONS,
	buttons, sizeof(struct kovaplus_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_common_receive(usb_dev, KOVAPLUS_USB_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 kovaplus_send(usb_dev, KOVAPLUS_USB_COMMAND_ACTUAL_PROFILE,
	&buf, sizeof(struct kovaplus_actual_profile));
	}

	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 kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));

	if (off >= sizeof(struct kovaplus_profile_settings))
	return 0;

	if (off + count > sizeof(struct kovaplus_profile_settings))
	count = sizeof(struct kovaplus_profile_settings) - off;

	mutex_lock(&kovaplus->kovaplus_lock);
	memcpy(buf, ((char const )&kovaplus->profile_settings[(uint *)(attr->private)]) + off,
	count);
	mutex_unlock(&kovaplus->kovaplus_lock);

	return count;
	}

	static ssize_t kovaplus_sysfs_write_profile_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 kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
	int retval = 0;
	int difference;
	int profile_index;
	struct kovaplus_profile_settings *profile_settings;

	if (off != 0 \|\| count != sizeof(struct kovaplus_profile_settings))
	return -EINVAL;

	profile_index = ((struct kovaplus_profile_settings const *)buf)->profile_index;
	profile_settings = &kovaplus->profile_settings[profile_index];

	mutex_lock(&kovaplus->kovaplus_lock);
	difference = memcmp(buf, profile_settings,
	sizeof(struct kovaplus_profile_settings));
	if (difference) {
	retval = kovaplus_set_profile_settings(usb_dev,
	(struct kovaplus_profile_settings const *)buf);
	if (!retval)
	memcpy(profile_settings, buf,
	sizeof(struct kovaplus_profile_settings));
	}
	mutex_unlock(&kovaplus->kovaplus_lock);

	if (retval)
	return retval;

	return sizeof(struct kovaplus_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 kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));

	if (off >= sizeof(struct kovaplus_profile_buttons))
	return 0;

	if (off + count > sizeof(struct kovaplus_profile_buttons))
	count = sizeof(struct kovaplus_profile_buttons) - off;

	mutex_lock(&kovaplus->kovaplus_lock);
	memcpy(buf, ((char const )&kovaplus->profile_buttons[(uint *)(attr->private)]) + off,
	count);
	mutex_unlock(&kovaplus->kovaplus_lock);

	return count;
	}

	static ssize_t kovaplus_sysfs_write_profile_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 kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
	int retval = 0;
	int difference;
	uint profile_index;
	struct kovaplus_profile_buttons *profile_buttons;

	if (off != 0 \|\| count != sizeof(struct kovaplus_profile_buttons))
	return -EINVAL;

	profile_index = ((struct kovaplus_profile_buttons const *)buf)->profile_index;
	profile_buttons = &kovaplus->profile_buttons[profile_index];

	mutex_lock(&kovaplus->kovaplus_lock);
	difference = memcmp(buf, profile_buttons,
	sizeof(struct kovaplus_profile_buttons));
	if (difference) {
	retval = kovaplus_set_profile_buttons(usb_dev,
	(struct kovaplus_profile_buttons const *)buf);
	if (!retval)
	memcpy(profile_buttons, buf,
	sizeof(struct kovaplus_profile_buttons));
	}
	mutex_unlock(&kovaplus->kovaplus_lock);

	if (retval)
	return retval;

	return sizeof(struct kovaplus_profile_buttons);
	}

	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\n", 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;

	dev = dev->parent->parent;
	kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
	usb_dev = interface_to_usbdev(to_usb_interface(dev));

	retval = strict_strtoul(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);
	kovaplus->actual_profile = profile;
	mutex_unlock(&kovaplus->kovaplus_lock);
	if (retval)
	return retval;

	return size;
	}

	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\n", kovaplus->actual_cpi);
	}

	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\n", kovaplus->actual_x_sensitivity);
	}

	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\n", kovaplus->actual_y_sensitivity);
	}

	static ssize_t kovaplus_sysfs_show_firmware_version(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\n", kovaplus->info.firmware_version);
	}

	static struct device_attribute kovaplus_attributes[] = {
	__ATTR(actual_cpi, 0440,
	kovaplus_sysfs_show_actual_cpi, NULL),
	__ATTR(firmware_version, 0440,
	kovaplus_sysfs_show_firmware_version, NULL),
	__ATTR(actual_profile, 0660,
	kovaplus_sysfs_show_actual_profile,
	kovaplus_sysfs_set_actual_profile),
	__ATTR(actual_sensitivity_x, 0440,
	kovaplus_sysfs_show_actual_sensitivity_x, NULL),
	__ATTR(actual_sensitivity_y, 0440,
	kovaplus_sysfs_show_actual_sensitivity_y, NULL),
	__ATTR_NULL
	};

	static struct bin_attribute kovaplus_bin_attributes[] = {
	{
	.attr = { .name = "profile_settings", .mode = 0220 },
	.size = sizeof(struct kovaplus_profile_settings),
	.write = kovaplus_sysfs_write_profile_settings
	},
	{
	.attr = { .name = "profile1_settings", .mode = 0440 },
	.size = sizeof(struct kovaplus_profile_settings),
	.read = kovaplus_sysfs_read_profilex_settings,
	.private = &profile_numbers[0]
	},
	{
	.attr = { .name = "profile2_settings", .mode = 0440 },
	.size = sizeof(struct kovaplus_profile_settings),
	.read = kovaplus_sysfs_read_profilex_settings,
	.private = &profile_numbers[1]
	},
	{
	.attr = { .name = "profile3_settings", .mode = 0440 },
	.size = sizeof(struct kovaplus_profile_settings),
	.read = kovaplus_sysfs_read_profilex_settings,
	.private = &profile_numbers[2]
	},
	{
	.attr = { .name = "profile4_settings", .mode = 0440 },
	.size = sizeof(struct kovaplus_profile_settings),
	.read = kovaplus_sysfs_read_profilex_settings,
	.private = &profile_numbers[3]
	},
	{
	.attr = { .name = "profile5_settings", .mode = 0440 },
	.size = sizeof(struct kovaplus_profile_settings),
	.read = kovaplus_sysfs_read_profilex_settings,
	.private = &profile_numbers[4]
	},
	{
	.attr = { .name = "profile_buttons", .mode = 0220 },
	.size = sizeof(struct kovaplus_profile_buttons),
	.write = kovaplus_sysfs_write_profile_buttons
	},
	{
	.attr = { .name = "profile1_buttons", .mode = 0440 },
	.size = sizeof(struct kovaplus_profile_buttons),
	.read = kovaplus_sysfs_read_profilex_buttons,
	.private = &profile_numbers[0]
	},
	{
	.attr = { .name = "profile2_buttons", .mode = 0440 },
	.size = sizeof(struct kovaplus_profile_buttons),
	.read = kovaplus_sysfs_read_profilex_buttons,
	.private = &profile_numbers[1]
	},
	{
	.attr = { .name = "profile3_buttons", .mode = 0440 },
	.size = sizeof(struct kovaplus_profile_buttons),
	.read = kovaplus_sysfs_read_profilex_buttons,
	.private = &profile_numbers[2]
	},
	{
	.attr = { .name = "profile4_buttons", .mode = 0440 },
	.size = sizeof(struct kovaplus_profile_buttons),
	.read = kovaplus_sysfs_read_profilex_buttons,
	.private = &profile_numbers[3]
	},
	{
	.attr = { .name = "profile5_buttons", .mode = 0440 },
	.size = sizeof(struct kovaplus_profile_buttons),
	.read = kovaplus_sysfs_read_profilex_buttons,
	.private = &profile_numbers[4]
	},
	__ATTR_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);

	retval = kovaplus_get_info(usb_dev, &kovaplus->info);
	if (retval)
	return retval;

	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\n");
	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\n");
	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\n");
	} 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\n");
	goto exit;
	}

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

	retval = kovaplus_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 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);
	case KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_SENSITIVITY:
	kovaplus->actual_x_sensitivity = button_report->data1;
	kovaplus->actual_y_sensitivity = button_report->data2;
	}
	}

	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;

	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_attrs = kovaplus_attributes;
	kovaplus_class->dev_bin_attrs = kovaplus_bin_attributes;

	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");