[linux-2.6-block.git] / drivers / hid / hid-roccat-arvo.c

/*
 * Roccat Arvo 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 Arvo is a gamer keyboard with 5 macro keys that can be configured in
 * 5 profiles.
 */

#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-arvo.h"

static struct class *arvo_class;

static ssize_t arvo_sysfs_show_mode_key(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct arvo_device *arvo =
			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	struct usb_device *usb_dev =
			interface_to_usbdev(to_usb_interface(dev->parent->parent));
	struct arvo_mode_key temp_buf;
	int retval;

	mutex_lock(&arvo->arvo_lock);
	retval = roccat_common2_receive(usb_dev, ARVO_COMMAND_MODE_KEY,
			&temp_buf, sizeof(struct arvo_mode_key));
	mutex_unlock(&arvo->arvo_lock);
	if (retval)
		return retval;

	return snprintf(buf, PAGE_SIZE, "%d\n", temp_buf.state);
}

static ssize_t arvo_sysfs_set_mode_key(struct device *dev,
		struct device_attribute *attr, char const *buf, size_t size)
{
	struct arvo_device *arvo =
			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	struct usb_device *usb_dev =
			interface_to_usbdev(to_usb_interface(dev->parent->parent));
	struct arvo_mode_key temp_buf;
	unsigned long state;
	int retval;

	retval = kstrtoul(buf, 10, &state);
	if (retval)
		return retval;

	temp_buf.command = ARVO_COMMAND_MODE_KEY;
	temp_buf.state = state;

	mutex_lock(&arvo->arvo_lock);
	retval = roccat_common2_send(usb_dev, ARVO_COMMAND_MODE_KEY,
			&temp_buf, sizeof(struct arvo_mode_key));
	mutex_unlock(&arvo->arvo_lock);
	if (retval)
		return retval;

	return size;
}
static DEVICE_ATTR(mode_key, 0660,
		   arvo_sysfs_show_mode_key, arvo_sysfs_set_mode_key);

static ssize_t arvo_sysfs_show_key_mask(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct arvo_device *arvo =
			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	struct usb_device *usb_dev =
			interface_to_usbdev(to_usb_interface(dev->parent->parent));
	struct arvo_key_mask temp_buf;
	int retval;

	mutex_lock(&arvo->arvo_lock);
	retval = roccat_common2_receive(usb_dev, ARVO_COMMAND_KEY_MASK,
			&temp_buf, sizeof(struct arvo_key_mask));
	mutex_unlock(&arvo->arvo_lock);
	if (retval)
		return retval;

	return snprintf(buf, PAGE_SIZE, "%d\n", temp_buf.key_mask);
}

static ssize_t arvo_sysfs_set_key_mask(struct device *dev,
		struct device_attribute *attr, char const *buf, size_t size)
{
	struct arvo_device *arvo =
			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	struct usb_device *usb_dev =
			interface_to_usbdev(to_usb_interface(dev->parent->parent));
	struct arvo_key_mask temp_buf;
	unsigned long key_mask;
	int retval;

	retval = kstrtoul(buf, 10, &key_mask);
	if (retval)
		return retval;

	temp_buf.command = ARVO_COMMAND_KEY_MASK;
	temp_buf.key_mask = key_mask;

	mutex_lock(&arvo->arvo_lock);
	retval = roccat_common2_send(usb_dev, ARVO_COMMAND_KEY_MASK,
			&temp_buf, sizeof(struct arvo_key_mask));
	mutex_unlock(&arvo->arvo_lock);
	if (retval)
		return retval;

	return size;
}
static DEVICE_ATTR(key_mask, 0660,
		   arvo_sysfs_show_key_mask, arvo_sysfs_set_key_mask);

/* retval is 1-5 on success, < 0 on error */
static int arvo_get_actual_profile(struct usb_device *usb_dev)
{
	struct arvo_actual_profile temp_buf;
	int retval;

	retval = roccat_common2_receive(usb_dev, ARVO_COMMAND_ACTUAL_PROFILE,
			&temp_buf, sizeof(struct arvo_actual_profile));

	if (retval)
		return retval;

	return temp_buf.actual_profile;
}

static ssize_t arvo_sysfs_show_actual_profile(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct arvo_device *arvo =
			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));

	return snprintf(buf, PAGE_SIZE, "%d\n", arvo->actual_profile);
}

static ssize_t arvo_sysfs_set_actual_profile(struct device *dev,
		struct device_attribute *attr, char const *buf, size_t size)
{
	struct arvo_device *arvo =
			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	struct usb_device *usb_dev =
			interface_to_usbdev(to_usb_interface(dev->parent->parent));
	struct arvo_actual_profile temp_buf;
	unsigned long profile;
	int retval;

	retval = kstrtoul(buf, 10, &profile);
	if (retval)
		return retval;

	if (profile < 1 || profile > 5)
		return -EINVAL;

	temp_buf.command = ARVO_COMMAND_ACTUAL_PROFILE;
	temp_buf.actual_profile = profile;

	mutex_lock(&arvo->arvo_lock);
	retval = roccat_common2_send(usb_dev, ARVO_COMMAND_ACTUAL_PROFILE,
			&temp_buf, sizeof(struct arvo_actual_profile));
	if (!retval) {
		arvo->actual_profile = profile;
		retval = size;
	}
	mutex_unlock(&arvo->arvo_lock);
	return retval;
}
static DEVICE_ATTR(actual_profile, 0660,
		   arvo_sysfs_show_actual_profile,
		   arvo_sysfs_set_actual_profile);

static ssize_t arvo_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 arvo_device *arvo = 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(&arvo->arvo_lock);
	retval = roccat_common2_send(usb_dev, command, buf, real_size);
	mutex_unlock(&arvo->arvo_lock);

	return (retval ? retval : real_size);
}

static ssize_t arvo_sysfs_read(struct file *fp,
		struct kobject *kobj, void *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 arvo_device *arvo = 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(&arvo->arvo_lock);
	retval = roccat_common2_receive(usb_dev, command, buf, real_size);
	mutex_unlock(&arvo->arvo_lock);

	return (retval ? retval : real_size);
}

static ssize_t arvo_sysfs_write_button(struct file *fp,
		struct kobject *kobj, struct bin_attribute *attr, char *buf,
		loff_t off, size_t count)
{
	return arvo_sysfs_write(fp, kobj, buf, off, count,
			sizeof(struct arvo_button), ARVO_COMMAND_BUTTON);
}
static BIN_ATTR(button, 0220, NULL, arvo_sysfs_write_button,
		sizeof(struct arvo_button));

static ssize_t arvo_sysfs_read_info(struct file *fp,
		struct kobject *kobj, struct bin_attribute *attr, char *buf,
		loff_t off, size_t count)
{
	return arvo_sysfs_read(fp, kobj, buf, off, count,
			sizeof(struct arvo_info), ARVO_COMMAND_INFO);
}
static BIN_ATTR(info, 0440, arvo_sysfs_read_info, NULL,
		sizeof(struct arvo_info));

static struct attribute *arvo_attrs[] = {
	&dev_attr_mode_key.attr,
	&dev_attr_key_mask.attr,
	&dev_attr_actual_profile.attr,
	NULL,
};

static struct bin_attribute *arvo_bin_attributes[] = {
	&bin_attr_button,
	&bin_attr_info,
	NULL,
};

static const struct attribute_group arvo_group = {
	.attrs = arvo_attrs,
	.bin_attrs = arvo_bin_attributes,
};

static const struct attribute_group *arvo_groups[] = {
	&arvo_group,
	NULL,
};

static int arvo_init_arvo_device_struct(struct usb_device *usb_dev,
		struct arvo_device *arvo)
{
	int retval;

	mutex_init(&arvo->arvo_lock);

	retval = arvo_get_actual_profile(usb_dev);
	if (retval < 0)
		return retval;
	arvo->actual_profile = retval;

	return 0;
}

static int arvo_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 arvo_device *arvo;
	int retval;

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

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

	retval = arvo_init_arvo_device_struct(usb_dev, arvo);
	if (retval) {
		hid_err(hdev, "couldn't init struct arvo_device\n");
		goto exit_free;
	}

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

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

static void arvo_remove_specials(struct hid_device *hdev)
{
	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	struct arvo_device *arvo;

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

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

static int arvo_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 = arvo_init_specials(hdev);
	if (retval) {
		hid_err(hdev, "couldn't install keyboard\n");
		goto exit_stop;
	}

	return 0;

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

static void arvo_remove(struct hid_device *hdev)
{
	arvo_remove_specials(hdev);
	hid_hw_stop(hdev);
}

static void arvo_report_to_chrdev(struct arvo_device const *arvo,
		u8 const *data)
{
	struct arvo_special_report const *special_report;
	struct arvo_roccat_report roccat_report;

	special_report = (struct arvo_special_report const *)data;

	roccat_report.profile = arvo->actual_profile;
	roccat_report.button = special_report->event &
			ARVO_SPECIAL_REPORT_EVENT_MASK_BUTTON;
	if ((special_report->event & ARVO_SPECIAL_REPORT_EVENT_MASK_ACTION) ==
			ARVO_SPECIAL_REPORT_EVENT_ACTION_PRESS)
		roccat_report.action = ARVO_ROCCAT_REPORT_ACTION_PRESS;
	else
		roccat_report.action = ARVO_ROCCAT_REPORT_ACTION_RELEASE;

	roccat_report_event(arvo->chrdev_minor,
			(uint8_t const *)&roccat_report);
}

static int arvo_raw_event(struct hid_device *hdev,
		struct hid_report *report, u8 *data, int size)
{
	struct arvo_device *arvo = hid_get_drvdata(hdev);

	if (size != 3)
		return 0;

	if (arvo && arvo->roccat_claimed)
		arvo_report_to_chrdev(arvo, data);

	return 0;
}

static const struct hid_device_id arvo_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ARVO) },
	{ }
};

MODULE_DEVICE_TABLE(hid, arvo_devices);

static struct hid_driver arvo_driver = {
	.name = "arvo",
	.id_table = arvo_devices,
	.probe = arvo_probe,
	.remove = arvo_remove,
	.raw_event = arvo_raw_event
};

static int __init arvo_init(void)
{
	int retval;

	arvo_class = class_create(THIS_MODULE, "arvo");
	if (IS_ERR(arvo_class))
		return PTR_ERR(arvo_class);
	arvo_class->dev_groups = arvo_groups;

	retval = hid_register_driver(&arvo_driver);
	if (retval)
		class_destroy(arvo_class);
	return retval;
}

static void __exit arvo_exit(void)
{
	hid_unregister_driver(&arvo_driver);
	class_destroy(arvo_class);
}

module_init(arvo_init);
module_exit(arvo_exit);

MODULE_AUTHOR("Stefan Achatz");
MODULE_DESCRIPTION("USB Roccat Arvo driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
	1	/*
	2	* Roccat Arvo driver for Linux
	3	*
	4	* Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net>
	5	*/
	6
	7	/*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the Free
	10	* Software Foundation; either version 2 of the License, or (at your option)
	11	* any later version.
	12	*/
	13
	14	/*
	15	* Roccat Arvo is a gamer keyboard with 5 macro keys that can be configured in
	16	* 5 profiles.
	17	*/
	18
	19	#include <linux/device.h>
	20	#include <linux/input.h>
	21	#include <linux/hid.h>
	22	#include <linux/module.h>
	23	#include <linux/slab.h>
	24	#include <linux/hid-roccat.h>
	25	#include "hid-ids.h"
	26	#include "hid-roccat-common.h"
	27	#include "hid-roccat-arvo.h"
	28
	29	static struct class *arvo_class;
	30
	31	static ssize_t arvo_sysfs_show_mode_key(struct device *dev,
	32	struct device_attribute attr, char buf)
	33	{
	34	struct arvo_device *arvo =
	35	hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	36	struct usb_device *usb_dev =
	37	interface_to_usbdev(to_usb_interface(dev->parent->parent));
	38	struct arvo_mode_key temp_buf;
	39	int retval;
	40
	41	mutex_lock(&arvo->arvo_lock);
	42	retval = roccat_common2_receive(usb_dev, ARVO_COMMAND_MODE_KEY,
	43	&temp_buf, sizeof(struct arvo_mode_key));
	44	mutex_unlock(&arvo->arvo_lock);
	45	if (retval)
	46	return retval;
	47
	48	return snprintf(buf, PAGE_SIZE, "%d\n", temp_buf.state);
	49	}
	50
	51	static ssize_t arvo_sysfs_set_mode_key(struct device *dev,
	52	struct device_attribute attr, char const buf, size_t size)
	53	{
	54	struct arvo_device *arvo =
	55	hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	56	struct usb_device *usb_dev =
	57	interface_to_usbdev(to_usb_interface(dev->parent->parent));
	58	struct arvo_mode_key temp_buf;
	59	unsigned long state;
	60	int retval;
	61
	62	retval = kstrtoul(buf, 10, &state);
	63	if (retval)
	64	return retval;
	65
	66	temp_buf.command = ARVO_COMMAND_MODE_KEY;
	67	temp_buf.state = state;
	68
	69	mutex_lock(&arvo->arvo_lock);
	70	retval = roccat_common2_send(usb_dev, ARVO_COMMAND_MODE_KEY,
	71	&temp_buf, sizeof(struct arvo_mode_key));
	72	mutex_unlock(&arvo->arvo_lock);
	73	if (retval)
	74	return retval;
	75
	76	return size;
	77	}
	78	static DEVICE_ATTR(mode_key, 0660,
	79	arvo_sysfs_show_mode_key, arvo_sysfs_set_mode_key);
	80
	81	static ssize_t arvo_sysfs_show_key_mask(struct device *dev,
	82	struct device_attribute attr, char buf)
	83	{
	84	struct arvo_device *arvo =
	85	hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	86	struct usb_device *usb_dev =
	87	interface_to_usbdev(to_usb_interface(dev->parent->parent));
	88	struct arvo_key_mask temp_buf;
	89	int retval;
	90
	91	mutex_lock(&arvo->arvo_lock);
	92	retval = roccat_common2_receive(usb_dev, ARVO_COMMAND_KEY_MASK,
	93	&temp_buf, sizeof(struct arvo_key_mask));
	94	mutex_unlock(&arvo->arvo_lock);
	95	if (retval)
	96	return retval;
	97
	98	return snprintf(buf, PAGE_SIZE, "%d\n", temp_buf.key_mask);
	99	}
	100
	101	static ssize_t arvo_sysfs_set_key_mask(struct device *dev,
	102	struct device_attribute attr, char const buf, size_t size)
	103	{
	104	struct arvo_device *arvo =
	105	hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	106	struct usb_device *usb_dev =
	107	interface_to_usbdev(to_usb_interface(dev->parent->parent));
	108	struct arvo_key_mask temp_buf;
	109	unsigned long key_mask;
	110	int retval;
	111
	112	retval = kstrtoul(buf, 10, &key_mask);
	113	if (retval)
	114	return retval;
	115
	116	temp_buf.command = ARVO_COMMAND_KEY_MASK;
	117	temp_buf.key_mask = key_mask;
	118
	119	mutex_lock(&arvo->arvo_lock);
	120	retval = roccat_common2_send(usb_dev, ARVO_COMMAND_KEY_MASK,
	121	&temp_buf, sizeof(struct arvo_key_mask));
	122	mutex_unlock(&arvo->arvo_lock);
	123	if (retval)
	124	return retval;
	125
	126	return size;
	127	}
	128	static DEVICE_ATTR(key_mask, 0660,
	129	arvo_sysfs_show_key_mask, arvo_sysfs_set_key_mask);
	130
	131	/* retval is 1-5 on success, < 0 on error */
	132	static int arvo_get_actual_profile(struct usb_device *usb_dev)
	133	{
	134	struct arvo_actual_profile temp_buf;
	135	int retval;
	136
	137	retval = roccat_common2_receive(usb_dev, ARVO_COMMAND_ACTUAL_PROFILE,
	138	&temp_buf, sizeof(struct arvo_actual_profile));
	139
	140	if (retval)
	141	return retval;
	142
	143	return temp_buf.actual_profile;
	144	}
	145
	146	static ssize_t arvo_sysfs_show_actual_profile(struct device *dev,
	147	struct device_attribute attr, char buf)
	148	{
	149	struct arvo_device *arvo =
	150	hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	151
	152	return snprintf(buf, PAGE_SIZE, "%d\n", arvo->actual_profile);
	153	}
	154
	155	static ssize_t arvo_sysfs_set_actual_profile(struct device *dev,
	156	struct device_attribute attr, char const buf, size_t size)
	157	{
	158	struct arvo_device *arvo =
	159	hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	160	struct usb_device *usb_dev =
	161	interface_to_usbdev(to_usb_interface(dev->parent->parent));
	162	struct arvo_actual_profile temp_buf;
	163	unsigned long profile;
	164	int retval;
	165
	166	retval = kstrtoul(buf, 10, &profile);
	167	if (retval)
	168	return retval;
	169
	170	if (profile < 1 \|\| profile > 5)
	171	return -EINVAL;
	172
	173	temp_buf.command = ARVO_COMMAND_ACTUAL_PROFILE;
	174	temp_buf.actual_profile = profile;
	175
	176	mutex_lock(&arvo->arvo_lock);
	177	retval = roccat_common2_send(usb_dev, ARVO_COMMAND_ACTUAL_PROFILE,
	178	&temp_buf, sizeof(struct arvo_actual_profile));
	179	if (!retval) {
	180	arvo->actual_profile = profile;
	181	retval = size;
	182	}
	183	mutex_unlock(&arvo->arvo_lock);
	184	return retval;
	185	}
	186	static DEVICE_ATTR(actual_profile, 0660,
	187	arvo_sysfs_show_actual_profile,
	188	arvo_sysfs_set_actual_profile);
	189
	190	static ssize_t arvo_sysfs_write(struct file *fp,
	191	struct kobject kobj, void const buf,
	192	loff_t off, size_t count, size_t real_size, uint command)
	193	{
	194	struct device *dev =
	195	container_of(kobj, struct device, kobj)->parent->parent;
	196	struct arvo_device *arvo = hid_get_drvdata(dev_get_drvdata(dev));
	197	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
	198	int retval;
	199
	200	if (off != 0 \|\| count != real_size)
	201	return -EINVAL;
	202
	203	mutex_lock(&arvo->arvo_lock);
	204	retval = roccat_common2_send(usb_dev, command, buf, real_size);
	205	mutex_unlock(&arvo->arvo_lock);
	206
	207	return (retval ? retval : real_size);
	208	}
	209
	210	static ssize_t arvo_sysfs_read(struct file *fp,
	211	struct kobject kobj, void buf, loff_t off,
	212	size_t count, size_t real_size, uint command)
	213	{
	214	struct device *dev =
	215	container_of(kobj, struct device, kobj)->parent->parent;
	216	struct arvo_device *arvo = hid_get_drvdata(dev_get_drvdata(dev));
	217	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
	218	int retval;
	219
	220	if (off >= real_size)
	221	return 0;
	222
	223	if (off != 0 \|\| count != real_size)
	224	return -EINVAL;
	225
	226	mutex_lock(&arvo->arvo_lock);
	227	retval = roccat_common2_receive(usb_dev, command, buf, real_size);
	228	mutex_unlock(&arvo->arvo_lock);
	229
	230	return (retval ? retval : real_size);
	231	}
	232
	233	static ssize_t arvo_sysfs_write_button(struct file *fp,
	234	struct kobject kobj, struct bin_attribute attr, char *buf,
	235	loff_t off, size_t count)
	236	{
	237	return arvo_sysfs_write(fp, kobj, buf, off, count,
	238	sizeof(struct arvo_button), ARVO_COMMAND_BUTTON);
	239	}
	240	static BIN_ATTR(button, 0220, NULL, arvo_sysfs_write_button,
	241	sizeof(struct arvo_button));
	242
	243	static ssize_t arvo_sysfs_read_info(struct file *fp,
	244	struct kobject kobj, struct bin_attribute attr, char *buf,
	245	loff_t off, size_t count)
	246	{
	247	return arvo_sysfs_read(fp, kobj, buf, off, count,
	248	sizeof(struct arvo_info), ARVO_COMMAND_INFO);
	249	}
	250	static BIN_ATTR(info, 0440, arvo_sysfs_read_info, NULL,
	251	sizeof(struct arvo_info));
	252
	253	static struct attribute *arvo_attrs[] = {
	254	&dev_attr_mode_key.attr,
	255	&dev_attr_key_mask.attr,
	256	&dev_attr_actual_profile.attr,
	257	NULL,
	258	};
	259
	260	static struct bin_attribute *arvo_bin_attributes[] = {
	261	&bin_attr_button,
	262	&bin_attr_info,
	263	NULL,
	264	};
	265
	266	static const struct attribute_group arvo_group = {
	267	.attrs = arvo_attrs,
	268	.bin_attrs = arvo_bin_attributes,
	269	};
	270
	271	static const struct attribute_group *arvo_groups[] = {
	272	&arvo_group,
	273	NULL,
	274	};
	275
	276	static int arvo_init_arvo_device_struct(struct usb_device *usb_dev,
	277	struct arvo_device *arvo)
	278	{
	279	int retval;
	280
	281	mutex_init(&arvo->arvo_lock);
	282
	283	retval = arvo_get_actual_profile(usb_dev);
	284	if (retval < 0)
	285	return retval;
	286	arvo->actual_profile = retval;
	287
	288	return 0;
	289	}
	290
	291	static int arvo_init_specials(struct hid_device *hdev)
	292	{
	293	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	294	struct usb_device *usb_dev = interface_to_usbdev(intf);
	295	struct arvo_device *arvo;
	296	int retval;
	297
	298	if (intf->cur_altsetting->desc.bInterfaceProtocol
	299	== USB_INTERFACE_PROTOCOL_KEYBOARD) {
	300	hid_set_drvdata(hdev, NULL);
	301	return 0;
	302	}
	303
	304	arvo = kzalloc(sizeof(*arvo), GFP_KERNEL);
	305	if (!arvo) {
	306	hid_err(hdev, "can't alloc device descriptor\n");
	307	return -ENOMEM;
	308	}
	309	hid_set_drvdata(hdev, arvo);
	310
	311	retval = arvo_init_arvo_device_struct(usb_dev, arvo);
	312	if (retval) {
	313	hid_err(hdev, "couldn't init struct arvo_device\n");
	314	goto exit_free;
	315	}
	316
	317	retval = roccat_connect(arvo_class, hdev,
	318	sizeof(struct arvo_roccat_report));
	319	if (retval < 0) {
	320	hid_err(hdev, "couldn't init char dev\n");
	321	} else {
	322	arvo->chrdev_minor = retval;
	323	arvo->roccat_claimed = 1;
	324	}
	325
	326	return 0;
	327	exit_free:
	328	kfree(arvo);
	329	return retval;
	330	}
	331
	332	static void arvo_remove_specials(struct hid_device *hdev)
	333	{
	334	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	335	struct arvo_device *arvo;
	336
	337	if (intf->cur_altsetting->desc.bInterfaceProtocol
	338	== USB_INTERFACE_PROTOCOL_KEYBOARD)
	339	return;
	340
	341	arvo = hid_get_drvdata(hdev);
	342	if (arvo->roccat_claimed)
	343	roccat_disconnect(arvo->chrdev_minor);
	344	kfree(arvo);
	345	}
	346
	347	static int arvo_probe(struct hid_device *hdev,
	348	const struct hid_device_id *id)
	349	{
	350	int retval;
	351
	352	retval = hid_parse(hdev);
	353	if (retval) {
	354	hid_err(hdev, "parse failed\n");
	355	goto exit;
	356	}
	357
	358	retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	359	if (retval) {
	360	hid_err(hdev, "hw start failed\n");
	361	goto exit;
	362	}
	363
	364	retval = arvo_init_specials(hdev);
	365	if (retval) {
	366	hid_err(hdev, "couldn't install keyboard\n");
	367	goto exit_stop;
	368	}
	369
	370	return 0;
	371
	372	exit_stop:
	373	hid_hw_stop(hdev);
	374	exit:
	375	return retval;
	376	}
	377
	378	static void arvo_remove(struct hid_device *hdev)
	379	{
	380	arvo_remove_specials(hdev);
	381	hid_hw_stop(hdev);
	382	}
	383
	384	static void arvo_report_to_chrdev(struct arvo_device const *arvo,
	385	u8 const *data)
	386	{
	387	struct arvo_special_report const *special_report;
	388	struct arvo_roccat_report roccat_report;
	389
	390	special_report = (struct arvo_special_report const *)data;
	391
	392	roccat_report.profile = arvo->actual_profile;
	393	roccat_report.button = special_report->event &
	394	ARVO_SPECIAL_REPORT_EVENT_MASK_BUTTON;
	395	if ((special_report->event & ARVO_SPECIAL_REPORT_EVENT_MASK_ACTION) ==
	396	ARVO_SPECIAL_REPORT_EVENT_ACTION_PRESS)
	397	roccat_report.action = ARVO_ROCCAT_REPORT_ACTION_PRESS;
	398	else
	399	roccat_report.action = ARVO_ROCCAT_REPORT_ACTION_RELEASE;
	400
	401	roccat_report_event(arvo->chrdev_minor,
	402	(uint8_t const *)&roccat_report);
	403	}
	404
	405	static int arvo_raw_event(struct hid_device *hdev,
	406	struct hid_report report, u8 data, int size)
	407	{
	408	struct arvo_device *arvo = hid_get_drvdata(hdev);
	409
	410	if (size != 3)
	411	return 0;
	412
	413	if (arvo && arvo->roccat_claimed)
	414	arvo_report_to_chrdev(arvo, data);
	415
	416	return 0;
	417	}
	418
	419	static const struct hid_device_id arvo_devices[] = {
	420	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ARVO) },
	421	{ }
	422	};
	423
	424	MODULE_DEVICE_TABLE(hid, arvo_devices);
	425
	426	static struct hid_driver arvo_driver = {
	427	.name = "arvo",
	428	.id_table = arvo_devices,
	429	.probe = arvo_probe,
	430	.remove = arvo_remove,
	431	.raw_event = arvo_raw_event
	432	};
	433
	434	static int __init arvo_init(void)
	435	{
	436	int retval;
	437
	438	arvo_class = class_create(THIS_MODULE, "arvo");
	439	if (IS_ERR(arvo_class))
	440	return PTR_ERR(arvo_class);
	441	arvo_class->dev_groups = arvo_groups;
	442
	443	retval = hid_register_driver(&arvo_driver);
	444	if (retval)
	445	class_destroy(arvo_class);
	446	return retval;
	447	}
	448
	449	static void __exit arvo_exit(void)
	450	{
	451	hid_unregister_driver(&arvo_driver);
	452	class_destroy(arvo_class);
	453	}
	454
	455	module_init(arvo_init);
	456	module_exit(arvo_exit);
	457
	458	MODULE_AUTHOR("Stefan Achatz");
	459	MODULE_DESCRIPTION("USB Roccat Arvo driver");
	460	MODULE_LICENSE("GPL v2");