[mirror_ubuntu-eoan-kernel.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 "hid-ids.h"
#include "hid-roccat.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_common_receive(usb_dev, ARVO_USB_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 = strict_strtoul(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_common_send(usb_dev, ARVO_USB_COMMAND_MODE_KEY,
			&temp_buf, sizeof(struct arvo_mode_key));
	mutex_unlock(&arvo->arvo_lock);
	if (retval)
		return retval;

	return size;
}

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_common_receive(usb_dev, ARVO_USB_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 = strict_strtoul(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_common_send(usb_dev, ARVO_USB_COMMAND_KEY_MASK,
			&temp_buf, sizeof(struct arvo_key_mask));
	mutex_unlock(&arvo->arvo_lock);
	if (retval)
		return retval;

	return size;
}

/* 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_common_receive(usb_dev, ARVO_USB_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 = strict_strtoul(buf, 10, &profile);
	if (retval)
		return retval;

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

	mutex_lock(&arvo->arvo_lock);
	retval = roccat_common_send(usb_dev, ARVO_USB_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 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_common_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_common_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_USB_COMMAND_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_USB_COMMAND_INFO);
}


static struct device_attribute arvo_attributes[] = {
	__ATTR(mode_key, 0660,
			arvo_sysfs_show_mode_key, arvo_sysfs_set_mode_key),
	__ATTR(key_mask, 0660,
			arvo_sysfs_show_key_mask, arvo_sysfs_set_key_mask),
	__ATTR(actual_profile, 0660,
			arvo_sysfs_show_actual_profile,
			arvo_sysfs_set_actual_profile),
	__ATTR_NULL
};

static struct bin_attribute arvo_bin_attributes[] = {
	{
		.attr = { .name = "button", .mode = 0220 },
		.size = sizeof(struct arvo_button),
		.write = arvo_sysfs_write_button
	},
	{
		.attr = { .name = "info", .mode = 0440 },
		.size = sizeof(struct arvo_info),
		.read = arvo_sysfs_read_info
	},
	__ATTR_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);
	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,
			sizeof(struct arvo_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->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_attrs = arvo_attributes;
	arvo_class->dev_bin_attrs = arvo_bin_attributes;

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

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

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
e68cc603 SA	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>
e68cc603 SA	22	#include <linux/module.h>
	23	#include <linux/slab.h>
	24	#include "hid-ids.h"
	25	#include "hid-roccat.h"
5772f636	26	#include "hid-roccat-common.h"
e68cc603 SA	27	#include "hid-roccat-arvo.h"
	28
	29	static struct class *arvo_class;
	30
e68cc603 SA	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));
5772f636	38	struct arvo_mode_key temp_buf;
e68cc603 SA	39	int retval;
e68cc603 SA	40
e68cc603	41	mutex_lock(&arvo->arvo_lock);
5772f636 SA	42	retval = roccat_common_receive(usb_dev, ARVO_USB_COMMAND_MODE_KEY,
5772f636 SA	43	&temp_buf, sizeof(struct arvo_mode_key));
e68cc603 SA	44	mutex_unlock(&arvo->arvo_lock);
e68cc603 SA	45	if (retval)
5772f636	46	return retval;
e68cc603	47
5772f636	48	return snprintf(buf, PAGE_SIZE, "%d\n", temp_buf.state);
e68cc603 SA	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));
5772f636	58	struct arvo_mode_key temp_buf;
e68cc603 SA	59	unsigned long state;
	60	int retval;
	61
e68cc603 SA	62	retval = strict_strtoul(buf, 10, &state);
e68cc603 SA	63	if (retval)
5772f636	64	return retval;
e68cc603	65
5772f636 SA	66	temp_buf.command = ARVO_COMMAND_MODE_KEY;
5772f636 SA	67	temp_buf.state = state;
e68cc603 SA	68
e68cc603 SA	69	mutex_lock(&arvo->arvo_lock);
5772f636 SA	70	retval = roccat_common_send(usb_dev, ARVO_USB_COMMAND_MODE_KEY,
5772f636 SA	71	&temp_buf, sizeof(struct arvo_mode_key));
e68cc603 SA	72	mutex_unlock(&arvo->arvo_lock);
e68cc603 SA	73	if (retval)
5772f636	74	return retval;
e68cc603	75
5772f636	76	return size;
e68cc603 SA	77	}
	78
	79	static ssize_t arvo_sysfs_show_key_mask(struct device *dev,
	80	struct device_attribute attr, char buf)
	81	{
	82	struct arvo_device *arvo =
	83	hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	84	struct usb_device *usb_dev =
	85	interface_to_usbdev(to_usb_interface(dev->parent->parent));
5772f636	86	struct arvo_key_mask temp_buf;
e68cc603 SA	87	int retval;
e68cc603 SA	88
e68cc603	89	mutex_lock(&arvo->arvo_lock);
5772f636 SA	90	retval = roccat_common_receive(usb_dev, ARVO_USB_COMMAND_KEY_MASK,
5772f636 SA	91	&temp_buf, sizeof(struct arvo_key_mask));
e68cc603 SA	92	mutex_unlock(&arvo->arvo_lock);
e68cc603 SA	93	if (retval)
5772f636	94	return retval;
e68cc603	95
5772f636	96	return snprintf(buf, PAGE_SIZE, "%d\n", temp_buf.key_mask);
e68cc603 SA	97	}
	98
	99	static ssize_t arvo_sysfs_set_key_mask(struct device *dev,
	100	struct device_attribute attr, char const buf, size_t size)
	101	{
	102	struct arvo_device *arvo =
	103	hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	104	struct usb_device *usb_dev =
	105	interface_to_usbdev(to_usb_interface(dev->parent->parent));
5772f636	106	struct arvo_key_mask temp_buf;
e68cc603 SA	107	unsigned long key_mask;
	108	int retval;
	109
e68cc603 SA	110	retval = strict_strtoul(buf, 10, &key_mask);
e68cc603 SA	111	if (retval)
5772f636	112	return retval;
e68cc603	113
5772f636 SA	114	temp_buf.command = ARVO_COMMAND_KEY_MASK;
5772f636 SA	115	temp_buf.key_mask = key_mask;
e68cc603 SA	116
e68cc603 SA	117	mutex_lock(&arvo->arvo_lock);
5772f636 SA	118	retval = roccat_common_send(usb_dev, ARVO_USB_COMMAND_KEY_MASK,
5772f636 SA	119	&temp_buf, sizeof(struct arvo_key_mask));
e68cc603 SA	120	mutex_unlock(&arvo->arvo_lock);
e68cc603 SA	121	if (retval)
5772f636	122	return retval;
e68cc603	123
5772f636	124	return size;
e68cc603 SA	125	}
	126
	127	/* retval is 1-5 on success, < 0 on error */
	128	static int arvo_get_actual_profile(struct usb_device *usb_dev)
	129	{
5772f636	130	struct arvo_actual_profile temp_buf;
e68cc603 SA	131	int retval;
e68cc603 SA	132
5772f636 SA	133	retval = roccat_common_receive(usb_dev, ARVO_USB_COMMAND_ACTUAL_PROFILE,
5772f636 SA	134	&temp_buf, sizeof(struct arvo_actual_profile));
e68cc603	135
5772f636 SA	136	if (retval)
5772f636 SA	137	return retval;
e68cc603	138
5772f636	139	return temp_buf.actual_profile;
e68cc603 SA	140	}
	141
	142	static ssize_t arvo_sysfs_show_actual_profile(struct device *dev,
	143	struct device_attribute attr, char buf)
	144	{
	145	struct arvo_device *arvo =
	146	hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	147
	148	return snprintf(buf, PAGE_SIZE, "%d\n", arvo->actual_profile);
	149	}
	150
	151	static ssize_t arvo_sysfs_set_actual_profile(struct device *dev,
	152	struct device_attribute attr, char const buf, size_t size)
	153	{
	154	struct arvo_device *arvo =
	155	hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	156	struct usb_device *usb_dev =
	157	interface_to_usbdev(to_usb_interface(dev->parent->parent));
5772f636	158	struct arvo_actual_profile temp_buf;
e68cc603 SA	159	unsigned long profile;
	160	int retval;
	161
e68cc603 SA	162	retval = strict_strtoul(buf, 10, &profile);
e68cc603 SA	163	if (retval)
5772f636	164	return retval;
e68cc603	165
5772f636 SA	166	temp_buf.command = ARVO_COMMAND_ACTUAL_PROFILE;
5772f636 SA	167	temp_buf.actual_profile = profile;
e68cc603 SA	168
e68cc603 SA	169	mutex_lock(&arvo->arvo_lock);
5772f636 SA	170	retval = roccat_common_send(usb_dev, ARVO_USB_COMMAND_ACTUAL_PROFILE,
5772f636 SA	171	&temp_buf, sizeof(struct arvo_actual_profile));
e68cc603 SA	172	if (!retval) {
	173	arvo->actual_profile = profile;
	174	retval = size;
	175	}
	176	mutex_unlock(&arvo->arvo_lock);
e68cc603 SA	177	return retval;
	178	}
	179
	180	static ssize_t arvo_sysfs_write(struct file *fp,
	181	struct kobject kobj, void const buf,
	182	loff_t off, size_t count, size_t real_size, uint command)
	183	{
	184	struct device *dev =
	185	container_of(kobj, struct device, kobj)->parent->parent;
	186	struct arvo_device *arvo = hid_get_drvdata(dev_get_drvdata(dev));
	187	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
	188	int retval;
	189
	190	if (off != 0 \|\| count != real_size)
	191	return -EINVAL;
	192
	193	mutex_lock(&arvo->arvo_lock);
5772f636	194	retval = roccat_common_send(usb_dev, command, buf, real_size);
e68cc603 SA	195	mutex_unlock(&arvo->arvo_lock);
	196
	197	return (retval ? retval : real_size);
	198	}
	199
	200	static ssize_t arvo_sysfs_read(struct file *fp,
	201	struct kobject kobj, void buf, loff_t off,
	202	size_t count, size_t real_size, uint command)
	203	{
	204	struct device *dev =
	205	container_of(kobj, struct device, kobj)->parent->parent;
	206	struct arvo_device *arvo = hid_get_drvdata(dev_get_drvdata(dev));
	207	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
	208	int retval;
	209
	210	if (off >= real_size)
	211	return 0;
	212
	213	if (off != 0 \|\| count != real_size)
	214	return -EINVAL;
	215
	216	mutex_lock(&arvo->arvo_lock);
5772f636	217	retval = roccat_common_receive(usb_dev, command, buf, real_size);
e68cc603 SA	218	mutex_unlock(&arvo->arvo_lock);
	219
	220	return (retval ? retval : real_size);
	221	}
	222
	223	static ssize_t arvo_sysfs_write_button(struct file *fp,
	224	struct kobject kobj, struct bin_attribute attr, char *buf,
	225	loff_t off, size_t count)
	226	{
	227	return arvo_sysfs_write(fp, kobj, buf, off, count,
	228	sizeof(struct arvo_button), ARVO_USB_COMMAND_BUTTON);
	229	}
	230
	231	static ssize_t arvo_sysfs_read_info(struct file *fp,
	232	struct kobject kobj, struct bin_attribute attr, char *buf,
	233	loff_t off, size_t count)
	234	{
	235	return arvo_sysfs_read(fp, kobj, buf, off, count,
	236	sizeof(struct arvo_info), ARVO_USB_COMMAND_INFO);
	237	}
	238
	239
	240	static struct device_attribute arvo_attributes[] = {
	241	__ATTR(mode_key, 0660,
	242	arvo_sysfs_show_mode_key, arvo_sysfs_set_mode_key),
	243	__ATTR(key_mask, 0660,
	244	arvo_sysfs_show_key_mask, arvo_sysfs_set_key_mask),
	245	__ATTR(actual_profile, 0660,
	246	arvo_sysfs_show_actual_profile,
	247	arvo_sysfs_set_actual_profile),
	248	__ATTR_NULL
	249	};
	250
	251	static struct bin_attribute arvo_bin_attributes[] = {
	252	{
	253	.attr = { .name = "button", .mode = 0220 },
	254	.size = sizeof(struct arvo_button),
	255	.write = arvo_sysfs_write_button
	256	},
	257	{
	258	.attr = { .name = "info", .mode = 0440 },
	259	.size = sizeof(struct arvo_info),
	260	.read = arvo_sysfs_read_info
	261	},
	262	__ATTR_NULL
	263	};
	264
	265	static int arvo_init_arvo_device_struct(struct usb_device *usb_dev,
	266	struct arvo_device *arvo)
	267	{
	268	int retval;
	269
	270	mutex_init(&arvo->arvo_lock);
	271
	272	retval = arvo_get_actual_profile(usb_dev);
	273	if (retval < 0)
	274	return retval;
	275	arvo->actual_profile = retval;
	276
	277	return 0;
	278	}
	279
	280	static int arvo_init_specials(struct hid_device *hdev)
	281	{
282	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
283	struct usb_device *usb_dev = interface_to_usbdev(intf);
284	struct arvo_device *arvo;
285	int retval;
286
287	if (intf->cur_altsetting->desc.bInterfaceProtocol
288	== USB_INTERFACE_PROTOCOL_KEYBOARD) {
289	hid_set_drvdata(hdev, NULL);
290	return 0;
291	}
292
293	arvo = kzalloc(sizeof(*arvo), GFP_KERNEL);
294	if (!arvo) {
a28764ef	295	hid_err(hdev, "can't alloc device descriptor\n");
e68cc603 SA	296	return -ENOMEM;
	297	}
	298	hid_set_drvdata(hdev, arvo);
	299
	300	retval = arvo_init_arvo_device_struct(usb_dev, arvo);
	301	if (retval) {
a28764ef	302	hid_err(hdev, "couldn't init struct arvo_device\n");
e68cc603 SA	303	goto exit_free;
	304	}
	305
	306	retval = roccat_connect(arvo_class, hdev);
	307	if (retval < 0) {
a28764ef	308	hid_err(hdev, "couldn't init char dev\n");
e68cc603 SA	309	} else {
	310	arvo->chrdev_minor = retval;
	311	arvo->roccat_claimed = 1;
	312	}
	313
	314	return 0;
	315	exit_free:
	316	kfree(arvo);
	317	return retval;
	318	}
	319
	320	static void arvo_remove_specials(struct hid_device *hdev)
	321	{
	322	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	323	struct arvo_device *arvo;
	324
	325	if (intf->cur_altsetting->desc.bInterfaceProtocol
	326	== USB_INTERFACE_PROTOCOL_KEYBOARD)
	327	return;
	328
	329	arvo = hid_get_drvdata(hdev);
	330	if (arvo->roccat_claimed)
	331	roccat_disconnect(arvo->chrdev_minor);
	332	kfree(arvo);
	333	}
	334
	335	static int arvo_probe(struct hid_device *hdev,
	336	const struct hid_device_id *id)
	337	{
	338	int retval;
	339
	340	retval = hid_parse(hdev);
	341	if (retval) {
a28764ef	342	hid_err(hdev, "parse failed\n");
e68cc603 SA	343	goto exit;
	344	}
	345
	346	retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	347	if (retval) {
a28764ef	348	hid_err(hdev, "hw start failed\n");
e68cc603 SA	349	goto exit;
	350	}
	351
	352	retval = arvo_init_specials(hdev);
	353	if (retval) {
a28764ef	354	hid_err(hdev, "couldn't install keyboard\n");
e68cc603 SA	355	goto exit_stop;
	356	}
	357
	358	return 0;
	359
	360	exit_stop:
	361	hid_hw_stop(hdev);
	362	exit:
	363	return retval;
	364	}
	365
	366	static void arvo_remove(struct hid_device *hdev)
	367	{
	368	arvo_remove_specials(hdev);
	369	hid_hw_stop(hdev);
	370	}
	371
	372	static void arvo_report_to_chrdev(struct arvo_device const *arvo,
	373	u8 const *data)
	374	{
	375	struct arvo_special_report const *special_report;
	376	struct arvo_roccat_report roccat_report;
	377
	378	special_report = (struct arvo_special_report const *)data;
	379
	380	roccat_report.profile = arvo->actual_profile;
	381	roccat_report.button = special_report->event &
	382	ARVO_SPECIAL_REPORT_EVENT_MASK_BUTTON;
	383	if ((special_report->event & ARVO_SPECIAL_REPORT_EVENT_MASK_ACTION) ==
	384	ARVO_SPECIAL_REPORT_EVENT_ACTION_PRESS)
	385	roccat_report.action = ARVO_ROCCAT_REPORT_ACTION_PRESS;
	386	else
	387	roccat_report.action = ARVO_ROCCAT_REPORT_ACTION_RELEASE;
	388
	389	roccat_report_event(arvo->chrdev_minor, (uint8_t const *)&roccat_report,
	390	sizeof(struct arvo_roccat_report));
	391	}
	392
	393	static int arvo_raw_event(struct hid_device *hdev,
	394	struct hid_report report, u8 data, int size)
	395	{
	396	struct arvo_device *arvo = hid_get_drvdata(hdev);
	397
	398	if (size != 3)
	399	return 0;
	400
	401	if (arvo->roccat_claimed)
	402	arvo_report_to_chrdev(arvo, data);
	403
	404	return 0;
	405	}
	406
	407	static const struct hid_device_id arvo_devices[] = {
	408	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ARVO) },
	409	{ }
	410	};
	411
	412	MODULE_DEVICE_TABLE(hid, arvo_devices);
	413
	414	static struct hid_driver arvo_driver = {
	415	.name = "arvo",
	416	.id_table = arvo_devices,
	417	.probe = arvo_probe,
	418	.remove = arvo_remove,
419	.raw_event = arvo_raw_event
420	};
421
422	static int __init arvo_init(void)
423	{
424	int retval;
425
426	arvo_class = class_create(THIS_MODULE, "arvo");
427	if (IS_ERR(arvo_class))
428	return PTR_ERR(arvo_class);
429	arvo_class->dev_attrs = arvo_attributes;
430	arvo_class->dev_bin_attrs = arvo_bin_attributes;
431
432	retval = hid_register_driver(&arvo_driver);
433	if (retval)
434	class_destroy(arvo_class);
435	return retval;
436	}
437
438	static void __exit arvo_exit(void)
439	{
440	class_destroy(arvo_class);
441	hid_unregister_driver(&arvo_driver);
442	}
443
444	module_init(arvo_init);
445	module_exit(arvo_exit);
446
447	MODULE_AUTHOR("Stefan Achatz");
448	MODULE_DESCRIPTION("USB Roccat Arvo driver");
449	MODULE_LICENSE("GPL v2");