[GitHub/mt8127/android_kernel_alcatel_ttab.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 = 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_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 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 = 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_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;
}

/* 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 = strict_strtoul(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 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 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 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,
			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_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)
{
	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 <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>
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
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);
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 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);
7392d73b	90	retval = roccat_common2_receive(usb_dev, ARVO_COMMAND_KEY_MASK,
5772f636	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);
7392d73b	118	retval = roccat_common2_send(usb_dev, ARVO_COMMAND_KEY_MASK,
5772f636	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
7392d73b	133	retval = roccat_common2_receive(usb_dev, ARVO_COMMAND_ACTUAL_PROFILE,
5772f636	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
901e64db SA	166	if (profile < 1 \|\| profile > 5)
	167	return -EINVAL;
	168
5772f636 SA	169	temp_buf.command = ARVO_COMMAND_ACTUAL_PROFILE;
5772f636 SA	170	temp_buf.actual_profile = profile;
e68cc603 SA	171
e68cc603 SA	172	mutex_lock(&arvo->arvo_lock);
7392d73b	173	retval = roccat_common2_send(usb_dev, ARVO_COMMAND_ACTUAL_PROFILE,
5772f636	174	&temp_buf, sizeof(struct arvo_actual_profile));
e68cc603 SA	175	if (!retval) {
	176	arvo->actual_profile = profile;
	177	retval = size;
	178	}
	179	mutex_unlock(&arvo->arvo_lock);
e68cc603 SA	180	return retval;
	181	}
	182
	183	static ssize_t arvo_sysfs_write(struct file *fp,
	184	struct kobject kobj, void const buf,
	185	loff_t off, size_t count, size_t real_size, uint command)
	186	{
	187	struct device *dev =
	188	container_of(kobj, struct device, kobj)->parent->parent;
	189	struct arvo_device *arvo = hid_get_drvdata(dev_get_drvdata(dev));
	190	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
	191	int retval;
	192
	193	if (off != 0 \|\| count != real_size)
	194	return -EINVAL;
	195
	196	mutex_lock(&arvo->arvo_lock);
7392d73b	197	retval = roccat_common2_send(usb_dev, command, buf, real_size);
e68cc603 SA	198	mutex_unlock(&arvo->arvo_lock);
	199
	200	return (retval ? retval : real_size);
	201	}
	202
	203	static ssize_t arvo_sysfs_read(struct file *fp,
	204	struct kobject kobj, void buf, loff_t off,
	205	size_t count, size_t real_size, uint command)
	206	{
	207	struct device *dev =
	208	container_of(kobj, struct device, kobj)->parent->parent;
	209	struct arvo_device *arvo = hid_get_drvdata(dev_get_drvdata(dev));
	210	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
	211	int retval;
	212
	213	if (off >= real_size)
	214	return 0;
	215
	216	if (off != 0 \|\| count != real_size)
	217	return -EINVAL;
	218
	219	mutex_lock(&arvo->arvo_lock);
7392d73b	220	retval = roccat_common2_receive(usb_dev, command, buf, real_size);
e68cc603 SA	221	mutex_unlock(&arvo->arvo_lock);
	222
	223	return (retval ? retval : real_size);
	224	}
	225
	226	static ssize_t arvo_sysfs_write_button(struct file *fp,
	227	struct kobject kobj, struct bin_attribute attr, char *buf,
	228	loff_t off, size_t count)
	229	{
	230	return arvo_sysfs_write(fp, kobj, buf, off, count,
1edd5b42	231	sizeof(struct arvo_button), ARVO_COMMAND_BUTTON);
e68cc603 SA	232	}
	233
	234	static ssize_t arvo_sysfs_read_info(struct file *fp,
	235	struct kobject kobj, struct bin_attribute attr, char *buf,
	236	loff_t off, size_t count)
	237	{
	238	return arvo_sysfs_read(fp, kobj, buf, off, count,
1edd5b42	239	sizeof(struct arvo_info), ARVO_COMMAND_INFO);
e68cc603 SA	240	}
	241
	242
	243	static struct device_attribute arvo_attributes[] = {
	244	__ATTR(mode_key, 0660,
	245	arvo_sysfs_show_mode_key, arvo_sysfs_set_mode_key),
	246	__ATTR(key_mask, 0660,
	247	arvo_sysfs_show_key_mask, arvo_sysfs_set_key_mask),
	248	__ATTR(actual_profile, 0660,
	249	arvo_sysfs_show_actual_profile,
	250	arvo_sysfs_set_actual_profile),
	251	__ATTR_NULL
	252	};
	253
	254	static struct bin_attribute arvo_bin_attributes[] = {
	255	{
	256	.attr = { .name = "button", .mode = 0220 },
	257	.size = sizeof(struct arvo_button),
	258	.write = arvo_sysfs_write_button
	259	},
	260	{
	261	.attr = { .name = "info", .mode = 0440 },
	262	.size = sizeof(struct arvo_info),
	263	.read = arvo_sysfs_read_info
	264	},
	265	__ATTR_NULL
	266	};
	267
	268	static int arvo_init_arvo_device_struct(struct usb_device *usb_dev,
	269	struct arvo_device *arvo)
	270	{
	271	int retval;
	272
	273	mutex_init(&arvo->arvo_lock);
	274
	275	retval = arvo_get_actual_profile(usb_dev);
	276	if (retval < 0)
	277	return retval;
	278	arvo->actual_profile = retval;
	279
	280	return 0;
	281	}
	282
	283	static int arvo_init_specials(struct hid_device *hdev)
	284	{
	285	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	286	struct usb_device *usb_dev = interface_to_usbdev(intf);
	287	struct arvo_device *arvo;
	288	int retval;
	289
	290	if (intf->cur_altsetting->desc.bInterfaceProtocol
	291	== USB_INTERFACE_PROTOCOL_KEYBOARD) {
	292	hid_set_drvdata(hdev, NULL);
	293	return 0;
	294	}
	295
	296	arvo = kzalloc(sizeof(*arvo), GFP_KERNEL);
	297	if (!arvo) {
a28764ef	298	hid_err(hdev, "can't alloc device descriptor\n");
e68cc603 SA	299	return -ENOMEM;
	300	}
	301	hid_set_drvdata(hdev, arvo);
	302
	303	retval = arvo_init_arvo_device_struct(usb_dev, arvo);
	304	if (retval) {
a28764ef	305	hid_err(hdev, "couldn't init struct arvo_device\n");
e68cc603 SA	306	goto exit_free;
	307	}
	308
8211e460 SA	309	retval = roccat_connect(arvo_class, hdev,
8211e460 SA	310	sizeof(struct arvo_roccat_report));
e68cc603	311	if (retval < 0) {
a28764ef	312	hid_err(hdev, "couldn't init char dev\n");
e68cc603 SA	313	} else {
	314	arvo->chrdev_minor = retval;
	315	arvo->roccat_claimed = 1;
	316	}
	317
	318	return 0;
	319	exit_free:
	320	kfree(arvo);
	321	return retval;
	322	}
	323
	324	static void arvo_remove_specials(struct hid_device *hdev)
	325	{
	326	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	327	struct arvo_device *arvo;
	328
	329	if (intf->cur_altsetting->desc.bInterfaceProtocol
	330	== USB_INTERFACE_PROTOCOL_KEYBOARD)
	331	return;
	332
	333	arvo = hid_get_drvdata(hdev);
	334	if (arvo->roccat_claimed)
	335	roccat_disconnect(arvo->chrdev_minor);
	336	kfree(arvo);
	337	}
	338
	339	static int arvo_probe(struct hid_device *hdev,
	340	const struct hid_device_id *id)
	341	{
	342	int retval;
	343
	344	retval = hid_parse(hdev);
	345	if (retval) {
a28764ef	346	hid_err(hdev, "parse failed\n");
e68cc603 SA	347	goto exit;
	348	}
	349
	350	retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	351	if (retval) {
a28764ef	352	hid_err(hdev, "hw start failed\n");
e68cc603 SA	353	goto exit;
	354	}
	355
	356	retval = arvo_init_specials(hdev);
	357	if (retval) {
a28764ef	358	hid_err(hdev, "couldn't install keyboard\n");
e68cc603 SA	359	goto exit_stop;
	360	}
	361
	362	return 0;
	363
	364	exit_stop:
	365	hid_hw_stop(hdev);
	366	exit:
	367	return retval;
	368	}
	369
	370	static void arvo_remove(struct hid_device *hdev)
	371	{
	372	arvo_remove_specials(hdev);
	373	hid_hw_stop(hdev);
	374	}
	375
	376	static void arvo_report_to_chrdev(struct arvo_device const *arvo,
	377	u8 const *data)
	378	{
	379	struct arvo_special_report const *special_report;
	380	struct arvo_roccat_report roccat_report;
	381
	382	special_report = (struct arvo_special_report const *)data;
	383
	384	roccat_report.profile = arvo->actual_profile;
	385	roccat_report.button = special_report->event &
	386	ARVO_SPECIAL_REPORT_EVENT_MASK_BUTTON;
	387	if ((special_report->event & ARVO_SPECIAL_REPORT_EVENT_MASK_ACTION) ==
	388	ARVO_SPECIAL_REPORT_EVENT_ACTION_PRESS)
	389	roccat_report.action = ARVO_ROCCAT_REPORT_ACTION_PRESS;
	390	else
	391	roccat_report.action = ARVO_ROCCAT_REPORT_ACTION_RELEASE;
	392
8211e460 SA	393	roccat_report_event(arvo->chrdev_minor,
8211e460 SA	394	(uint8_t const *)&roccat_report);
e68cc603 SA	395	}
	396
	397	static int arvo_raw_event(struct hid_device *hdev,
	398	struct hid_report report, u8 data, int size)
	399	{
	400	struct arvo_device *arvo = hid_get_drvdata(hdev);
	401
	402	if (size != 3)
	403	return 0;
	404
901e64db	405	if (arvo && arvo->roccat_claimed)
e68cc603 SA	406	arvo_report_to_chrdev(arvo, data);
	407
	408	return 0;
	409	}
	410
	411	static const struct hid_device_id arvo_devices[] = {
	412	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ARVO) },
	413	{ }
	414	};
	415
	416	MODULE_DEVICE_TABLE(hid, arvo_devices);
	417
	418	static struct hid_driver arvo_driver = {
	419	.name = "arvo",
	420	.id_table = arvo_devices,
	421	.probe = arvo_probe,
	422	.remove = arvo_remove,
	423	.raw_event = arvo_raw_event
	424	};
	425
	426	static int __init arvo_init(void)
	427	{
	428	int retval;
	429
	430	arvo_class = class_create(THIS_MODULE, "arvo");
	431	if (IS_ERR(arvo_class))
	432	return PTR_ERR(arvo_class);
	433	arvo_class->dev_attrs = arvo_attributes;
	434	arvo_class->dev_bin_attrs = arvo_bin_attributes;
	435
	436	retval = hid_register_driver(&arvo_driver);
	437	if (retval)
	438	class_destroy(arvo_class);
	439	return retval;
	440	}
	441
	442	static void __exit arvo_exit(void)
	443	{
e68cc603	444	hid_unregister_driver(&arvo_driver);
74b643da	445	class_destroy(arvo_class);
e68cc603 SA	446	}
	447
	448	module_init(arvo_init);
	449	module_exit(arvo_exit);
	450
	451	MODULE_AUTHOR("Stefan Achatz");
	452	MODULE_DESCRIPTION("USB Roccat Arvo driver");
	453	MODULE_LICENSE("GPL v2");