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

/*
 * Roccat Arvo driver for Linux
 *
 * Copyright (c) 2011 Stefan Achatz <[email protected]>
 */

/*
 * 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 = kobj_to_dev(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 = kobj_to_dev(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
e68cc603 SA	1	/*
	2	* Roccat Arvo driver for Linux
	3	*
	4	* Copyright (c) 2011 Stefan Achatz <[email protected]>
	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>
e68cc603 SA	23	#include <linux/slab.h>
5dc0c983	24	#include <linux/hid-roccat.h>
e68cc603	25	#include "hid-ids.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);
7392d73b	42	retval = roccat_common2_receive(usb_dev, ARVO_COMMAND_MODE_KEY,
5772f636	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
dfc450b5	62	retval = kstrtoul(buf, 10, &state);
e68cc603	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);
7392d73b	70	retval = roccat_common2_send(usb_dev, ARVO_COMMAND_MODE_KEY,
5772f636	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	77	}
46a58c44 GKH	78	static DEVICE_ATTR(mode_key, 0660,
46a58c44 GKH	79	arvo_sysfs_show_mode_key, arvo_sysfs_set_mode_key);
e68cc603 SA	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));
5772f636	88	struct arvo_key_mask temp_buf;
e68cc603 SA	89	int retval;
e68cc603 SA	90
e68cc603	91	mutex_lock(&arvo->arvo_lock);
7392d73b	92	retval = roccat_common2_receive(usb_dev, ARVO_COMMAND_KEY_MASK,
5772f636	93	&temp_buf, sizeof(struct arvo_key_mask));
e68cc603 SA	94	mutex_unlock(&arvo->arvo_lock);
e68cc603 SA	95	if (retval)
5772f636	96	return retval;
e68cc603	97
5772f636	98	return snprintf(buf, PAGE_SIZE, "%d\n", temp_buf.key_mask);
e68cc603 SA	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));
5772f636	108	struct arvo_key_mask temp_buf;
e68cc603 SA	109	unsigned long key_mask;
	110	int retval;
	111
dfc450b5	112	retval = kstrtoul(buf, 10, &key_mask);
e68cc603	113	if (retval)
5772f636	114	return retval;
e68cc603	115
5772f636 SA	116	temp_buf.command = ARVO_COMMAND_KEY_MASK;
5772f636 SA	117	temp_buf.key_mask = key_mask;
e68cc603 SA	118
e68cc603 SA	119	mutex_lock(&arvo->arvo_lock);
7392d73b	120	retval = roccat_common2_send(usb_dev, ARVO_COMMAND_KEY_MASK,
5772f636	121	&temp_buf, sizeof(struct arvo_key_mask));
e68cc603 SA	122	mutex_unlock(&arvo->arvo_lock);
e68cc603 SA	123	if (retval)
5772f636	124	return retval;
e68cc603	125
5772f636	126	return size;
e68cc603	127	}
46a58c44 GKH	128	static DEVICE_ATTR(key_mask, 0660,
46a58c44 GKH	129	arvo_sysfs_show_key_mask, arvo_sysfs_set_key_mask);
e68cc603 SA	130
	131	/* retval is 1-5 on success, < 0 on error */
	132	static int arvo_get_actual_profile(struct usb_device *usb_dev)
	133	{
5772f636	134	struct arvo_actual_profile temp_buf;
e68cc603 SA	135	int retval;
e68cc603 SA	136
7392d73b	137	retval = roccat_common2_receive(usb_dev, ARVO_COMMAND_ACTUAL_PROFILE,
5772f636	138	&temp_buf, sizeof(struct arvo_actual_profile));
e68cc603	139
5772f636 SA	140	if (retval)
5772f636 SA	141	return retval;
e68cc603	142
5772f636	143	return temp_buf.actual_profile;
e68cc603 SA	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));
5772f636	162	struct arvo_actual_profile temp_buf;
e68cc603 SA	163	unsigned long profile;
	164	int retval;
	165
dfc450b5	166	retval = kstrtoul(buf, 10, &profile);
e68cc603	167	if (retval)
5772f636	168	return retval;
e68cc603	169
901e64db SA	170	if (profile < 1 \|\| profile > 5)
	171	return -EINVAL;
	172
5772f636 SA	173	temp_buf.command = ARVO_COMMAND_ACTUAL_PROFILE;
5772f636 SA	174	temp_buf.actual_profile = profile;
e68cc603 SA	175
e68cc603 SA	176	mutex_lock(&arvo->arvo_lock);
7392d73b	177	retval = roccat_common2_send(usb_dev, ARVO_COMMAND_ACTUAL_PROFILE,
5772f636	178	&temp_buf, sizeof(struct arvo_actual_profile));
e68cc603 SA	179	if (!retval) {
	180	arvo->actual_profile = profile;
	181	retval = size;
	182	}
	183	mutex_unlock(&arvo->arvo_lock);
e68cc603 SA	184	return retval;
e68cc603 SA	185	}
46a58c44 GKH	186	static DEVICE_ATTR(actual_profile, 0660,
	187	arvo_sysfs_show_actual_profile,
	188	arvo_sysfs_set_actual_profile);
e68cc603 SA	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	{
2cf83833	194	struct device *dev = kobj_to_dev(kobj)->parent->parent;
e68cc603 SA	195	struct arvo_device *arvo = hid_get_drvdata(dev_get_drvdata(dev));
	196	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
	197	int retval;
	198
	199	if (off != 0 \|\| count != real_size)
	200	return -EINVAL;
	201
	202	mutex_lock(&arvo->arvo_lock);
7392d73b	203	retval = roccat_common2_send(usb_dev, command, buf, real_size);
e68cc603 SA	204	mutex_unlock(&arvo->arvo_lock);
	205
	206	return (retval ? retval : real_size);
	207	}
	208
	209	static ssize_t arvo_sysfs_read(struct file *fp,
	210	struct kobject kobj, void buf, loff_t off,
	211	size_t count, size_t real_size, uint command)
	212	{
2cf83833	213	struct device *dev = kobj_to_dev(kobj)->parent->parent;
e68cc603 SA	214	struct arvo_device *arvo = hid_get_drvdata(dev_get_drvdata(dev));
	215	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
	216	int retval;
	217
	218	if (off >= real_size)
	219	return 0;
	220
	221	if (off != 0 \|\| count != real_size)
	222	return -EINVAL;
	223
	224	mutex_lock(&arvo->arvo_lock);
7392d73b	225	retval = roccat_common2_receive(usb_dev, command, buf, real_size);
e68cc603 SA	226	mutex_unlock(&arvo->arvo_lock);
	227
	228	return (retval ? retval : real_size);
	229	}
	230
	231	static ssize_t arvo_sysfs_write_button(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_write(fp, kobj, buf, off, count,
1edd5b42	236	sizeof(struct arvo_button), ARVO_COMMAND_BUTTON);
e68cc603	237	}
e0a00d86 GKH	238	static BIN_ATTR(button, 0220, NULL, arvo_sysfs_write_button,
e0a00d86 GKH	239	sizeof(struct arvo_button));
e68cc603 SA	240
	241	static ssize_t arvo_sysfs_read_info(struct file *fp,
	242	struct kobject kobj, struct bin_attribute attr, char *buf,
	243	loff_t off, size_t count)
	244	{
	245	return arvo_sysfs_read(fp, kobj, buf, off, count,
1edd5b42	246	sizeof(struct arvo_info), ARVO_COMMAND_INFO);
e68cc603	247	}
e0a00d86 GKH	248	static BIN_ATTR(info, 0440, arvo_sysfs_read_info, NULL,
e0a00d86 GKH	249	sizeof(struct arvo_info));
e68cc603	250
46a58c44 GKH	251	static struct attribute *arvo_attrs[] = {
	252	&dev_attr_mode_key.attr,
	253	&dev_attr_key_mask.attr,
	254	&dev_attr_actual_profile.attr,
	255	NULL,
e68cc603	256	};
e0a00d86 GKH	257
	258	static struct bin_attribute *arvo_bin_attributes[] = {
	259	&bin_attr_button,
	260	&bin_attr_info,
	261	NULL,
	262	};
	263
	264	static const struct attribute_group arvo_group = {
	265	.attrs = arvo_attrs,
	266	.bin_attrs = arvo_bin_attributes,
	267	};
	268
	269	static const struct attribute_group *arvo_groups[] = {
	270	&arvo_group,
	271	NULL,
e68cc603 SA	272	};
	273
	274	static int arvo_init_arvo_device_struct(struct usb_device *usb_dev,
	275	struct arvo_device *arvo)
	276	{
	277	int retval;
	278
	279	mutex_init(&arvo->arvo_lock);
	280
	281	retval = arvo_get_actual_profile(usb_dev);
	282	if (retval < 0)
	283	return retval;
	284	arvo->actual_profile = retval;
	285
	286	return 0;
	287	}
	288
	289	static int arvo_init_specials(struct hid_device *hdev)
	290	{
	291	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	292	struct usb_device *usb_dev = interface_to_usbdev(intf);
	293	struct arvo_device *arvo;
	294	int retval;
	295
	296	if (intf->cur_altsetting->desc.bInterfaceProtocol
	297	== USB_INTERFACE_PROTOCOL_KEYBOARD) {
	298	hid_set_drvdata(hdev, NULL);
	299	return 0;
	300	}
	301
	302	arvo = kzalloc(sizeof(*arvo), GFP_KERNEL);
	303	if (!arvo) {
a28764ef	304	hid_err(hdev, "can't alloc device descriptor\n");
e68cc603 SA	305	return -ENOMEM;
	306	}
	307	hid_set_drvdata(hdev, arvo);
	308
	309	retval = arvo_init_arvo_device_struct(usb_dev, arvo);
	310	if (retval) {
a28764ef	311	hid_err(hdev, "couldn't init struct arvo_device\n");
e68cc603 SA	312	goto exit_free;
	313	}
	314
8211e460 SA	315	retval = roccat_connect(arvo_class, hdev,
8211e460 SA	316	sizeof(struct arvo_roccat_report));
e68cc603	317	if (retval < 0) {
a28764ef	318	hid_err(hdev, "couldn't init char dev\n");
e68cc603 SA	319	} else {
	320	arvo->chrdev_minor = retval;
	321	arvo->roccat_claimed = 1;
	322	}
	323
	324	return 0;
	325	exit_free:
	326	kfree(arvo);
	327	return retval;
	328	}
	329
	330	static void arvo_remove_specials(struct hid_device *hdev)
	331	{
	332	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	333	struct arvo_device *arvo;
	334
	335	if (intf->cur_altsetting->desc.bInterfaceProtocol
	336	== USB_INTERFACE_PROTOCOL_KEYBOARD)
	337	return;
	338
	339	arvo = hid_get_drvdata(hdev);
	340	if (arvo->roccat_claimed)
	341	roccat_disconnect(arvo->chrdev_minor);
	342	kfree(arvo);
	343	}
	344
	345	static int arvo_probe(struct hid_device *hdev,
	346	const struct hid_device_id *id)
	347	{
	348	int retval;
	349
	350	retval = hid_parse(hdev);
	351	if (retval) {
a28764ef	352	hid_err(hdev, "parse failed\n");
e68cc603 SA	353	goto exit;
	354	}
	355
	356	retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	357	if (retval) {
a28764ef	358	hid_err(hdev, "hw start failed\n");
e68cc603 SA	359	goto exit;
	360	}
	361
	362	retval = arvo_init_specials(hdev);
	363	if (retval) {
a28764ef	364	hid_err(hdev, "couldn't install keyboard\n");
e68cc603 SA	365	goto exit_stop;
	366	}
	367
	368	return 0;
	369
	370	exit_stop:
	371	hid_hw_stop(hdev);
	372	exit:
	373	return retval;
	374	}
	375
	376	static void arvo_remove(struct hid_device *hdev)
	377	{
	378	arvo_remove_specials(hdev);
	379	hid_hw_stop(hdev);
	380	}
	381
	382	static void arvo_report_to_chrdev(struct arvo_device const *arvo,
	383	u8 const *data)
	384	{
	385	struct arvo_special_report const *special_report;
	386	struct arvo_roccat_report roccat_report;
	387
	388	special_report = (struct arvo_special_report const *)data;
	389
	390	roccat_report.profile = arvo->actual_profile;
	391	roccat_report.button = special_report->event &
	392	ARVO_SPECIAL_REPORT_EVENT_MASK_BUTTON;
	393	if ((special_report->event & ARVO_SPECIAL_REPORT_EVENT_MASK_ACTION) ==
	394	ARVO_SPECIAL_REPORT_EVENT_ACTION_PRESS)
	395	roccat_report.action = ARVO_ROCCAT_REPORT_ACTION_PRESS;
	396	else
	397	roccat_report.action = ARVO_ROCCAT_REPORT_ACTION_RELEASE;
	398
8211e460 SA	399	roccat_report_event(arvo->chrdev_minor,
8211e460 SA	400	(uint8_t const *)&roccat_report);
e68cc603 SA	401	}
	402
	403	static int arvo_raw_event(struct hid_device *hdev,
	404	struct hid_report report, u8 data, int size)
	405	{
	406	struct arvo_device *arvo = hid_get_drvdata(hdev);
	407
	408	if (size != 3)
	409	return 0;
	410
901e64db	411	if (arvo && arvo->roccat_claimed)
e68cc603 SA	412	arvo_report_to_chrdev(arvo, data);
	413
	414	return 0;
	415	}
	416
	417	static const struct hid_device_id arvo_devices[] = {
	418	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ARVO) },
	419	{ }
	420	};
	421
	422	MODULE_DEVICE_TABLE(hid, arvo_devices);
	423
	424	static struct hid_driver arvo_driver = {
	425	.name = "arvo",
	426	.id_table = arvo_devices,
	427	.probe = arvo_probe,
	428	.remove = arvo_remove,
	429	.raw_event = arvo_raw_event
	430	};
	431
	432	static int __init arvo_init(void)
	433	{
	434	int retval;
	435
	436	arvo_class = class_create(THIS_MODULE, "arvo");
	437	if (IS_ERR(arvo_class))
	438	return PTR_ERR(arvo_class);
46a58c44	439	arvo_class->dev_groups = arvo_groups;
e68cc603 SA	440
	441	retval = hid_register_driver(&arvo_driver);
	442	if (retval)
	443	class_destroy(arvo_class);
	444	return retval;
	445	}
	446
	447	static void __exit arvo_exit(void)
	448	{
e68cc603	449	hid_unregister_driver(&arvo_driver);
74b643da	450	class_destroy(arvo_class);
e68cc603 SA	451	}
	452
	453	module_init(arvo_init);
	454	module_exit(arvo_exit);
	455
	456	MODULE_AUTHOR("Stefan Achatz");
	457	MODULE_DESCRIPTION("USB Roccat Arvo driver");
	458	MODULE_LICENSE("GPL v2");