/*
 * Roccat Kone[+] driver for Linux
 *
 * Copyright (c) 2010 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 Kone[+] is an updated/improved version of the Kone with more memory
 * and functionality and without the non-standard behaviours the Kone had.
 */

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

static uint profile_numbers[5] = {0, 1, 2, 3, 4};

static struct class *koneplus_class;

static void koneplus_profile_activated(struct koneplus_device *koneplus,
		uint new_profile)
{
	koneplus->actual_profile = new_profile;
}

static int koneplus_send_control(struct usb_device *usb_dev, uint value,
		enum koneplus_control_requests request)
{
	int len;
	struct koneplus_control *control;

	if ((request == KONEPLUS_CONTROL_REQUEST_PROFILE_SETTINGS ||
			request == KONEPLUS_CONTROL_REQUEST_PROFILE_BUTTONS) &&
			value > 4)
		return -EINVAL;

	control = kmalloc(sizeof(struct koneplus_control), GFP_KERNEL);
	if (!control)
		return -ENOMEM;

	control->command = KONEPLUS_COMMAND_CONTROL;
	control->value = value;
	control->request = request;

	len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
			USB_REQ_SET_CONFIGURATION,
			USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
			KONEPLUS_USB_COMMAND_CONTROL, 0, control,
			sizeof(struct koneplus_control),
			USB_CTRL_SET_TIMEOUT);

	kfree(control);

	if (len != sizeof(struct koneplus_control))
		return len;

	return 0;
}

static int koneplus_receive(struct usb_device *usb_dev, uint usb_command,
		void *buf, uint size) {
	int len;

	len = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
			USB_REQ_CLEAR_FEATURE,
			USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
			usb_command, 0, buf, size, USB_CTRL_SET_TIMEOUT);

	return (len != size) ? -EIO : 0;
}

static int koneplus_receive_control_status(struct usb_device *usb_dev)
{
	int retval;
	struct koneplus_control *control;

	control = kmalloc(sizeof(struct koneplus_control), GFP_KERNEL);
	if (!control)
		return -ENOMEM;

	do {
		retval = koneplus_receive(usb_dev, KONEPLUS_USB_COMMAND_CONTROL,
				control, sizeof(struct koneplus_control));

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

		if (control->value == KONEPLUS_CONTROL_REQUEST_STATUS_OK) {
			retval = 0;
			goto out;
		}

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

		/* seems to be critical - replug necessary */
		if (control->value == KONEPLUS_CONTROL_REQUEST_STATUS_OVERLOAD) {
			retval = -EINVAL;
			goto out;
		}

		hid_err(usb_dev, "koneplus_receive_control_status: "
				"unknown response value 0x%x\n", control->value);
		retval = -EINVAL;
		goto out;

	} while (1);
out:
	kfree(control);
	return retval;
}

static int koneplus_send(struct usb_device *usb_dev, uint command,
		void *buf, uint size) {
	int len;

	len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
			USB_REQ_SET_CONFIGURATION,
			USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
			command, 0, buf, size, USB_CTRL_SET_TIMEOUT);

	if (len != size)
		return -EIO;

	if (koneplus_receive_control_status(usb_dev))
		return -EIO;

	return 0;
}

static int koneplus_select_profile(struct usb_device *usb_dev, uint number,
		enum koneplus_control_requests request)
{
	int retval;

	retval = koneplus_send_control(usb_dev, number, request);
	if (retval)
		return retval;

	/* allow time to settle things - windows driver uses 500 */
	msleep(100);

	retval = koneplus_receive_control_status(usb_dev);
	if (retval)
		return retval;

	return 0;
}

static int koneplus_get_info(struct usb_device *usb_dev,
		struct koneplus_info *buf)
{
	return koneplus_receive(usb_dev, KONEPLUS_USB_COMMAND_INFO,
			buf, sizeof(struct koneplus_info));
}

static int koneplus_get_profile_settings(struct usb_device *usb_dev,
		struct koneplus_profile_settings *buf, uint number)
{
	int retval;

	retval = koneplus_select_profile(usb_dev, number,
			KONEPLUS_CONTROL_REQUEST_PROFILE_SETTINGS);
	if (retval)
		return retval;

	return koneplus_receive(usb_dev, KONEPLUS_USB_COMMAND_PROFILE_SETTINGS,
			buf, sizeof(struct koneplus_profile_settings));
}

static int koneplus_set_profile_settings(struct usb_device *usb_dev,
		struct koneplus_profile_settings const *settings)
{
	return koneplus_send(usb_dev, KONEPLUS_USB_COMMAND_PROFILE_SETTINGS,
			(void *)settings, sizeof(struct koneplus_profile_settings));
}

static int koneplus_get_profile_buttons(struct usb_device *usb_dev,
		struct koneplus_profile_buttons *buf, int number)
{
	int retval;

	retval = koneplus_select_profile(usb_dev, number,
			KONEPLUS_CONTROL_REQUEST_PROFILE_BUTTONS);
	if (retval)
		return retval;

	return koneplus_receive(usb_dev, KONEPLUS_USB_COMMAND_PROFILE_BUTTONS,
			buf, sizeof(struct koneplus_profile_buttons));
}

static int koneplus_set_profile_buttons(struct usb_device *usb_dev,
		struct koneplus_profile_buttons const *buttons)
{
	return koneplus_send(usb_dev, KONEPLUS_USB_COMMAND_PROFILE_BUTTONS,
			(void *)buttons, sizeof(struct koneplus_profile_buttons));
}

/* retval is 0-4 on success, < 0 on error */
static int koneplus_get_startup_profile(struct usb_device *usb_dev)
{
	struct koneplus_startup_profile *buf;
	int retval;

	buf = kmalloc(sizeof(struct koneplus_startup_profile), GFP_KERNEL);
	if (buf == NULL)
		return -ENOMEM;

	retval = koneplus_receive(usb_dev, KONEPLUS_USB_COMMAND_STARTUP_PROFILE,
			buf, sizeof(struct koneplus_startup_profile));

	if (retval)
		goto out;

	retval = buf->startup_profile;
out:
	kfree(buf);
	return retval;
}

static int koneplus_set_startup_profile(struct usb_device *usb_dev,
		int startup_profile)
{
	struct koneplus_startup_profile buf;

	buf.command = KONEPLUS_COMMAND_STARTUP_PROFILE;
	buf.size = sizeof(struct koneplus_startup_profile);
	buf.startup_profile = startup_profile;

	return koneplus_send(usb_dev, KONEPLUS_USB_COMMAND_STARTUP_PROFILE,
			(char *)&buf, sizeof(struct koneplus_profile_buttons));
}

static ssize_t koneplus_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 koneplus_device *koneplus = 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(&koneplus->koneplus_lock);
	retval = koneplus_receive(usb_dev, command, buf, real_size);
	mutex_unlock(&koneplus->koneplus_lock);

	if (retval)
		return retval;

	return real_size;
}

static ssize_t koneplus_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 koneplus_device *koneplus = 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(&koneplus->koneplus_lock);
	retval = koneplus_send(usb_dev, command, (void *)buf, real_size);
	mutex_unlock(&koneplus->koneplus_lock);

	if (retval)
		return retval;

	return real_size;
}

static ssize_t koneplus_sysfs_write_macro(struct file *fp,
		struct kobject *kobj, struct bin_attribute *attr, char *buf,
		loff_t off, size_t count)
{
	return koneplus_sysfs_write(fp, kobj, buf, off, count,
			sizeof(struct koneplus_macro), KONEPLUS_USB_COMMAND_MACRO);
}

static ssize_t koneplus_sysfs_read_sensor(struct file *fp,
		struct kobject *kobj, struct bin_attribute *attr, char *buf,
		loff_t off, size_t count)
{
	return koneplus_sysfs_read(fp, kobj, buf, off, count,
			sizeof(struct koneplus_sensor), KONEPLUS_USB_COMMAND_SENSOR);
}

static ssize_t koneplus_sysfs_write_sensor(struct file *fp,
		struct kobject *kobj, struct bin_attribute *attr, char *buf,
		loff_t off, size_t count)
{
	return koneplus_sysfs_write(fp, kobj, buf, off, count,
			sizeof(struct koneplus_sensor), KONEPLUS_USB_COMMAND_SENSOR);
}

static ssize_t koneplus_sysfs_write_tcu(struct file *fp,
		struct kobject *kobj, struct bin_attribute *attr, char *buf,
		loff_t off, size_t count)
{
	return koneplus_sysfs_write(fp, kobj, buf, off, count,
			sizeof(struct koneplus_tcu), KONEPLUS_USB_COMMAND_TCU);
}

static ssize_t koneplus_sysfs_read_tcu_image(struct file *fp,
		struct kobject *kobj, struct bin_attribute *attr, char *buf,
		loff_t off, size_t count)
{
	return koneplus_sysfs_read(fp, kobj, buf, off, count,
			sizeof(struct koneplus_tcu_image), KONEPLUS_USB_COMMAND_TCU);
}

static ssize_t koneplus_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 koneplus_device *koneplus = hid_get_drvdata(dev_get_drvdata(dev));

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

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

	mutex_lock(&koneplus->koneplus_lock);
	memcpy(buf, ((void const *)&koneplus->profile_settings[*(uint *)(attr->private)]) + off,
			count);
	mutex_unlock(&koneplus->koneplus_lock);

	return count;
}

static ssize_t koneplus_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 koneplus_device *koneplus = 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_number;
	struct koneplus_profile_settings *profile_settings;

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

	profile_number = ((struct koneplus_profile_settings const *)buf)->number;
	profile_settings = &koneplus->profile_settings[profile_number];

	mutex_lock(&koneplus->koneplus_lock);
	difference = memcmp(buf, profile_settings,
			sizeof(struct koneplus_profile_settings));
	if (difference) {
		retval = koneplus_set_profile_settings(usb_dev,
				(struct koneplus_profile_settings const *)buf);
		if (!retval)
			memcpy(profile_settings, buf,
					sizeof(struct koneplus_profile_settings));
	}
	mutex_unlock(&koneplus->koneplus_lock);

	if (retval)
		return retval;

	return sizeof(struct koneplus_profile_settings);
}

static ssize_t koneplus_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 koneplus_device *koneplus = hid_get_drvdata(dev_get_drvdata(dev));

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

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

	mutex_lock(&koneplus->koneplus_lock);
	memcpy(buf, ((void const *)&koneplus->profile_buttons[*(uint *)(attr->private)]) + off,
			count);
	mutex_unlock(&koneplus->koneplus_lock);

	return count;
}

static ssize_t koneplus_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 koneplus_device *koneplus = 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_number;
	struct koneplus_profile_buttons *profile_buttons;

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

	profile_number = ((struct koneplus_profile_buttons const *)buf)->number;
	profile_buttons = &koneplus->profile_buttons[profile_number];

	mutex_lock(&koneplus->koneplus_lock);
	difference = memcmp(buf, profile_buttons,
			sizeof(struct koneplus_profile_buttons));
	if (difference) {
		retval = koneplus_set_profile_buttons(usb_dev,
				(struct koneplus_profile_buttons const *)buf);
		if (!retval)
			memcpy(profile_buttons, buf,
					sizeof(struct koneplus_profile_buttons));
	}
	mutex_unlock(&koneplus->koneplus_lock);

	if (retval)
		return retval;

	return sizeof(struct koneplus_profile_buttons);
}

static ssize_t koneplus_sysfs_show_startup_profile(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct koneplus_device *koneplus =
			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	return snprintf(buf, PAGE_SIZE, "%d\n", koneplus->startup_profile);
}

static ssize_t koneplus_sysfs_set_startup_profile(struct device *dev,
		struct device_attribute *attr, char const *buf, size_t size)
{
	struct koneplus_device *koneplus;
	struct usb_device *usb_dev;
	unsigned long profile;
	int retval;

	dev = dev->parent->parent;
	koneplus = 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;

	mutex_lock(&koneplus->koneplus_lock);
	retval = koneplus_set_startup_profile(usb_dev, profile);
	mutex_unlock(&koneplus->koneplus_lock);
	if (retval)
		return retval;

	return size;
}

static ssize_t koneplus_sysfs_show_actual_profile(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct koneplus_device *koneplus =
			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	return snprintf(buf, PAGE_SIZE, "%d\n", koneplus->actual_profile);
}

static ssize_t koneplus_sysfs_show_firmware_version(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct koneplus_device *koneplus =
			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	return snprintf(buf, PAGE_SIZE, "%d\n", koneplus->info.firmware_version);
}

static struct device_attribute koneplus_attributes[] = {
	__ATTR(startup_profile, 0660,
			koneplus_sysfs_show_startup_profile,
			koneplus_sysfs_set_startup_profile),
	__ATTR(actual_profile, 0440,
			koneplus_sysfs_show_actual_profile, NULL),
	__ATTR(firmware_version, 0440,
			koneplus_sysfs_show_firmware_version, NULL),
	__ATTR_NULL
};

static struct bin_attribute koneplus_bin_attributes[] = {
	{
		.attr = { .name = "sensor", .mode = 0220 },
		.size = sizeof(struct koneplus_sensor),
		.read = koneplus_sysfs_read_sensor,
		.write = koneplus_sysfs_write_sensor
	},
	{
		.attr = { .name = "tcu", .mode = 0220 },
		.size = sizeof(struct koneplus_tcu),
		.write = koneplus_sysfs_write_tcu
	},
	{
		.attr = { .name = "tcu_image", .mode = 0440 },
		.size = sizeof(struct koneplus_tcu_image),
		.read = koneplus_sysfs_read_tcu_image
	},
	{
		.attr = { .name = "profile_settings", .mode = 0220 },
		.size = sizeof(struct koneplus_profile_settings),
		.write = koneplus_sysfs_write_profile_settings
	},
	{
		.attr = { .name = "profile1_settings", .mode = 0440 },
		.size = sizeof(struct koneplus_profile_settings),
		.read = koneplus_sysfs_read_profilex_settings,
		.private = &profile_numbers[0]
	},
	{
		.attr = { .name = "profile2_settings", .mode = 0440 },
		.size = sizeof(struct koneplus_profile_settings),
		.read = koneplus_sysfs_read_profilex_settings,
		.private = &profile_numbers[1]
	},
	{
		.attr = { .name = "profile3_settings", .mode = 0440 },
		.size = sizeof(struct koneplus_profile_settings),
		.read = koneplus_sysfs_read_profilex_settings,
		.private = &profile_numbers[2]
	},
	{
		.attr = { .name = "profile4_settings", .mode = 0440 },
		.size = sizeof(struct koneplus_profile_settings),
		.read = koneplus_sysfs_read_profilex_settings,
		.private = &profile_numbers[3]
	},
	{
		.attr = { .name = "profile5_settings", .mode = 0440 },
		.size = sizeof(struct koneplus_profile_settings),
		.read = koneplus_sysfs_read_profilex_settings,
		.private = &profile_numbers[4]
	},
	{
		.attr = { .name = "profile_buttons", .mode = 0220 },
		.size = sizeof(struct koneplus_profile_buttons),
		.write = koneplus_sysfs_write_profile_buttons
	},
	{
		.attr = { .name = "profile1_buttons", .mode = 0440 },
		.size = sizeof(struct koneplus_profile_buttons),
		.read = koneplus_sysfs_read_profilex_buttons,
		.private = &profile_numbers[0]
	},
	{
		.attr = { .name = "profile2_buttons", .mode = 0440 },
		.size = sizeof(struct koneplus_profile_buttons),
		.read = koneplus_sysfs_read_profilex_buttons,
		.private = &profile_numbers[1]
	},
	{
		.attr = { .name = "profile3_buttons", .mode = 0440 },
		.size = sizeof(struct koneplus_profile_buttons),
		.read = koneplus_sysfs_read_profilex_buttons,
		.private = &profile_numbers[2]
	},
	{
		.attr = { .name = "profile4_buttons", .mode = 0440 },
		.size = sizeof(struct koneplus_profile_buttons),
		.read = koneplus_sysfs_read_profilex_buttons,
		.private = &profile_numbers[3]
	},
	{
		.attr = { .name = "profile5_buttons", .mode = 0440 },
		.size = sizeof(struct koneplus_profile_buttons),
		.read = koneplus_sysfs_read_profilex_buttons,
		.private = &profile_numbers[4]
	},
	{
		.attr = { .name = "macro", .mode = 0220 },
		.size = sizeof(struct koneplus_macro),
		.write = koneplus_sysfs_write_macro
	},
	__ATTR_NULL
};

static int koneplus_init_koneplus_device_struct(struct usb_device *usb_dev,
		struct koneplus_device *koneplus)
{
	int retval, i;
	static uint wait = 70; /* device will freeze with just 60 */

	mutex_init(&koneplus->koneplus_lock);

	koneplus->startup_profile = koneplus_get_startup_profile(usb_dev);
	if (koneplus->startup_profile < 0)
		return koneplus->startup_profile;

	msleep(wait);
	retval = koneplus_get_info(usb_dev, &koneplus->info);
	if (retval)
		return retval;

	for (i = 0; i < 5; ++i) {
		msleep(wait);
		retval = koneplus_get_profile_settings(usb_dev,
				&koneplus->profile_settings[i], i);
		if (retval)
			return retval;

		msleep(wait);
		retval = koneplus_get_profile_buttons(usb_dev,
				&koneplus->profile_buttons[i], i);
		if (retval)
			return retval;
	}

	koneplus_profile_activated(koneplus, koneplus->startup_profile);

	return 0;
}

static int koneplus_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 koneplus_device *koneplus;
	int retval;

	if (intf->cur_altsetting->desc.bInterfaceProtocol
			== USB_INTERFACE_PROTOCOL_MOUSE) {

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

		retval = koneplus_init_koneplus_device_struct(usb_dev, koneplus);
		if (retval) {
			hid_err(hdev, "couldn't init struct koneplus_device\n");
			goto exit_free;
		}

		retval = roccat_connect(koneplus_class, hdev);
		if (retval < 0) {
			hid_err(hdev, "couldn't init char dev\n");
		} else {
			koneplus->chrdev_minor = retval;
			koneplus->roccat_claimed = 1;
		}
	} else {
		hid_set_drvdata(hdev, NULL);
	}

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

static void koneplus_remove_specials(struct hid_device *hdev)
{
	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	struct koneplus_device *koneplus;

	if (intf->cur_altsetting->desc.bInterfaceProtocol
			== USB_INTERFACE_PROTOCOL_MOUSE) {
		koneplus = hid_get_drvdata(hdev);
		if (koneplus->roccat_claimed)
			roccat_disconnect(koneplus->chrdev_minor);
		kfree(koneplus);
	}
}

static int koneplus_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 = koneplus_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 koneplus_remove(struct hid_device *hdev)
{
	koneplus_remove_specials(hdev);
	hid_hw_stop(hdev);
}

static void koneplus_keep_values_up_to_date(struct koneplus_device *koneplus,
		u8 const *data)
{
	struct koneplus_mouse_report_button const *button_report;

	switch (data[0]) {
	case KONEPLUS_MOUSE_REPORT_NUMBER_BUTTON:
		button_report = (struct koneplus_mouse_report_button const *)data;
		switch (button_report->type) {
		case KONEPLUS_MOUSE_REPORT_BUTTON_TYPE_PROFILE:
			koneplus_profile_activated(koneplus, button_report->data1 - 1);
			break;
		}
		break;
	}
}

static void koneplus_report_to_chrdev(struct koneplus_device const *koneplus,
		u8 const *data)
{
	struct koneplus_roccat_report roccat_report;
	struct koneplus_mouse_report_button const *button_report;

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

	button_report = (struct koneplus_mouse_report_button const *)data;

	if ((button_report->type == KONEPLUS_MOUSE_REPORT_BUTTON_TYPE_QUICKLAUNCH ||
			button_report->type == KONEPLUS_MOUSE_REPORT_BUTTON_TYPE_TIMER) &&
			button_report->data2 != KONEPLUS_MOUSE_REPORT_BUTTON_ACTION_PRESS)
		return;

	roccat_report.type = button_report->type;
	roccat_report.data1 = button_report->data1;
	roccat_report.data2 = button_report->data2;
	roccat_report.profile = koneplus->actual_profile + 1;
	roccat_report_event(koneplus->chrdev_minor,
			(uint8_t const *)&roccat_report,
			sizeof(struct koneplus_roccat_report));
}

static int koneplus_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 koneplus_device *koneplus = hid_get_drvdata(hdev);

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

	koneplus_keep_values_up_to_date(koneplus, data);

	if (koneplus->roccat_claimed)
		koneplus_report_to_chrdev(koneplus, data);

	return 0;
}

static const struct hid_device_id koneplus_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONEPLUS) },
	{ }
};

MODULE_DEVICE_TABLE(hid, koneplus_devices);

static struct hid_driver koneplus_driver = {
		.name = "koneplus",
		.id_table = koneplus_devices,
		.probe = koneplus_probe,
		.remove = koneplus_remove,
		.raw_event = koneplus_raw_event
};

static int __init koneplus_init(void)
{
	int retval;

	/* class name has to be same as driver name */
	koneplus_class = class_create(THIS_MODULE, "koneplus");
	if (IS_ERR(koneplus_class))
		return PTR_ERR(koneplus_class);
	koneplus_class->dev_attrs = koneplus_attributes;
	koneplus_class->dev_bin_attrs = koneplus_bin_attributes;

	retval = hid_register_driver(&koneplus_driver);
	if (retval)
		class_destroy(koneplus_class);
	return retval;
}

static void __exit koneplus_exit(void)
{
	class_destroy(koneplus_class);
	hid_unregister_driver(&koneplus_driver);
}

module_init(koneplus_init);
module_exit(koneplus_exit);

MODULE_AUTHOR("Stefan Achatz");
MODULE_DESCRIPTION("USB Roccat Kone[+] driver");
MODULE_LICENSE("GPL v2");