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

/*
 * Roccat Isku 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 Isku is a gamer keyboard with 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-isku.h"

static struct class *isku_class;

static void isku_profile_activated(struct isku_device *isku, uint new_profile)
{
	isku->actual_profile = new_profile;
}

static int isku_receive(struct usb_device *usb_dev, uint command,
		void *buf, uint size)
{
	return roccat_common2_receive(usb_dev, command, buf, size);
}

static int isku_get_actual_profile(struct usb_device *usb_dev)
{
	struct isku_actual_profile buf;
	int retval;

	retval = isku_receive(usb_dev, ISKU_COMMAND_ACTUAL_PROFILE,
			&buf, sizeof(struct isku_actual_profile));
	return retval ? retval : buf.actual_profile;
}

static int isku_set_actual_profile(struct usb_device *usb_dev, int new_profile)
{
	struct isku_actual_profile buf;

	buf.command = ISKU_COMMAND_ACTUAL_PROFILE;
	buf.size = sizeof(struct isku_actual_profile);
	buf.actual_profile = new_profile;
	return roccat_common2_send_with_status(usb_dev,
			ISKU_COMMAND_ACTUAL_PROFILE, &buf,
			sizeof(struct isku_actual_profile));
}

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

static ssize_t isku_sysfs_set_actual_profile(struct device *dev,
		struct device_attribute *attr, char const *buf, size_t size)
{
	struct isku_device *isku;
	struct usb_device *usb_dev;
	unsigned long profile;
	int retval;
	struct isku_roccat_report roccat_report;

	dev = dev->parent->parent;
	isku = hid_get_drvdata(dev_get_drvdata(dev));
	usb_dev = interface_to_usbdev(to_usb_interface(dev));

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

	if (profile > 4)
		return -EINVAL;

	mutex_lock(&isku->isku_lock);

	retval = isku_set_actual_profile(usb_dev, profile);
	if (retval) {
		mutex_unlock(&isku->isku_lock);
		return retval;
	}

	isku_profile_activated(isku, profile);

	roccat_report.event = ISKU_REPORT_BUTTON_EVENT_PROFILE;
	roccat_report.data1 = profile + 1;
	roccat_report.data2 = 0;
	roccat_report.profile = profile + 1;
	roccat_report_event(isku->chrdev_minor, (uint8_t const *)&roccat_report);

	mutex_unlock(&isku->isku_lock);

	return size;
}

static struct device_attribute isku_attributes[] = {
	__ATTR(actual_profile, 0660,
			isku_sysfs_show_actual_profile,
			isku_sysfs_set_actual_profile),
	__ATTR_NULL
};

static ssize_t isku_sysfs_read(struct file *fp, struct kobject *kobj,
		char *buf, loff_t off, size_t count,
		size_t real_size, uint command)
{
	struct device *dev =
			container_of(kobj, struct device, kobj)->parent->parent;
	struct isku_device *isku = 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(&isku->isku_lock);
	retval = isku_receive(usb_dev, command, buf, real_size);
	mutex_unlock(&isku->isku_lock);

	return retval ? retval : real_size;
}

static ssize_t isku_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 isku_device *isku = 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(&isku->isku_lock);
	retval = roccat_common2_send_with_status(usb_dev, command,
			(void *)buf, real_size);
	mutex_unlock(&isku->isku_lock);

	return retval ? retval : real_size;
}

#define ISKU_SYSFS_W(thingy, THINGY) \
static ssize_t isku_sysfs_write_ ## thingy(struct file *fp, struct kobject *kobj, \
		struct bin_attribute *attr, char *buf, \
		loff_t off, size_t count) \
{ \
	return isku_sysfs_write(fp, kobj, buf, off, count, \
			sizeof(struct isku_ ## thingy), ISKU_COMMAND_ ## THINGY); \
}

#define ISKU_SYSFS_R(thingy, THINGY) \
static ssize_t isku_sysfs_read_ ## thingy(struct file *fp, struct kobject *kobj, \
		struct bin_attribute *attr, char *buf, \
		loff_t off, size_t count) \
{ \
	return isku_sysfs_read(fp, kobj, buf, off, count, \
			sizeof(struct isku_ ## thingy), ISKU_COMMAND_ ## THINGY); \
}

#define ISKU_SYSFS_RW(thingy, THINGY) \
ISKU_SYSFS_R(thingy, THINGY) \
ISKU_SYSFS_W(thingy, THINGY)

#define ISKU_BIN_ATTR_RW(thingy) \
{ \
	.attr = { .name = #thingy, .mode = 0660 }, \
	.size = sizeof(struct isku_ ## thingy), \
	.read = isku_sysfs_read_ ## thingy, \
	.write = isku_sysfs_write_ ## thingy \
}

#define ISKU_BIN_ATTR_R(thingy) \
{ \
	.attr = { .name = #thingy, .mode = 0440 }, \
	.size = sizeof(struct isku_ ## thingy), \
	.read = isku_sysfs_read_ ## thingy, \
}

#define ISKU_BIN_ATTR_W(thingy) \
{ \
	.attr = { .name = #thingy, .mode = 0220 }, \
	.size = sizeof(struct isku_ ## thingy), \
	.write = isku_sysfs_write_ ## thingy \
}

ISKU_SYSFS_RW(macro, MACRO)
ISKU_SYSFS_RW(keys_function, KEYS_FUNCTION)
ISKU_SYSFS_RW(keys_easyzone, KEYS_EASYZONE)
ISKU_SYSFS_RW(keys_media, KEYS_MEDIA)
ISKU_SYSFS_RW(keys_thumbster, KEYS_THUMBSTER)
ISKU_SYSFS_RW(keys_macro, KEYS_MACRO)
ISKU_SYSFS_RW(keys_capslock, KEYS_CAPSLOCK)
ISKU_SYSFS_RW(light, LIGHT)
ISKU_SYSFS_RW(key_mask, KEY_MASK)
ISKU_SYSFS_RW(last_set, LAST_SET)
ISKU_SYSFS_W(talk, TALK)
ISKU_SYSFS_R(info, INFO)
ISKU_SYSFS_W(control, CONTROL)

static struct bin_attribute isku_bin_attributes[] = {
	ISKU_BIN_ATTR_RW(macro),
	ISKU_BIN_ATTR_RW(keys_function),
	ISKU_BIN_ATTR_RW(keys_easyzone),
	ISKU_BIN_ATTR_RW(keys_media),
	ISKU_BIN_ATTR_RW(keys_thumbster),
	ISKU_BIN_ATTR_RW(keys_macro),
	ISKU_BIN_ATTR_RW(keys_capslock),
	ISKU_BIN_ATTR_RW(light),
	ISKU_BIN_ATTR_RW(key_mask),
	ISKU_BIN_ATTR_RW(last_set),
	ISKU_BIN_ATTR_W(talk),
	ISKU_BIN_ATTR_R(info),
	ISKU_BIN_ATTR_W(control),
	__ATTR_NULL
};

static int isku_init_isku_device_struct(struct usb_device *usb_dev,
		struct isku_device *isku)
{
	int retval;

	mutex_init(&isku->isku_lock);

	retval = isku_get_actual_profile(usb_dev);
	if (retval < 0)
		return retval;
	isku_profile_activated(isku, retval);

	return 0;
}

static int isku_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 isku_device *isku;
	int retval;

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

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

	retval = isku_init_isku_device_struct(usb_dev, isku);
	if (retval) {
		hid_err(hdev, "couldn't init struct isku_device\n");
		goto exit_free;
	}

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

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

static void isku_remove_specials(struct hid_device *hdev)
{
	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	struct isku_device *isku;

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

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

static int isku_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 = isku_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 isku_remove(struct hid_device *hdev)
{
	isku_remove_specials(hdev);
	hid_hw_stop(hdev);
}

static void isku_keep_values_up_to_date(struct isku_device *isku,
		u8 const *data)
{
	struct isku_report_button const *button_report;

	switch (data[0]) {
	case ISKU_REPORT_NUMBER_BUTTON:
		button_report = (struct isku_report_button const *)data;
		switch (button_report->event) {
		case ISKU_REPORT_BUTTON_EVENT_PROFILE:
			isku_profile_activated(isku, button_report->data1 - 1);
			break;
		}
		break;
	}
}

static void isku_report_to_chrdev(struct isku_device const *isku,
		u8 const *data)
{
	struct isku_roccat_report roccat_report;
	struct isku_report_button const *button_report;

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

	button_report = (struct isku_report_button const *)data;

	roccat_report.event = button_report->event;
	roccat_report.data1 = button_report->data1;
	roccat_report.data2 = button_report->data2;
	roccat_report.profile = isku->actual_profile + 1;
	roccat_report_event(isku->chrdev_minor,
			(uint8_t const *)&roccat_report);
}

static int isku_raw_event(struct hid_device *hdev,
		struct hid_report *report, u8 *data, int size)
{
	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	struct isku_device *isku = hid_get_drvdata(hdev);

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

	if (isku == NULL)
		return 0;

	isku_keep_values_up_to_date(isku, data);

	if (isku->roccat_claimed)
		isku_report_to_chrdev(isku, data);

	return 0;
}

static const struct hid_device_id isku_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ISKU) },
	{ }
};

MODULE_DEVICE_TABLE(hid, isku_devices);

static struct hid_driver isku_driver = {
		.name = "isku",
		.id_table = isku_devices,
		.probe = isku_probe,
		.remove = isku_remove,
		.raw_event = isku_raw_event
};

static int __init isku_init(void)
{
	int retval;
	isku_class = class_create(THIS_MODULE, "isku");
	if (IS_ERR(isku_class))
		return PTR_ERR(isku_class);
	isku_class->dev_attrs = isku_attributes;
	isku_class->dev_bin_attrs = isku_bin_attributes;

	retval = hid_register_driver(&isku_driver);
	if (retval)
		class_destroy(isku_class);
	return retval;
}

static void __exit isku_exit(void)
{
	hid_unregister_driver(&isku_driver);
	class_destroy(isku_class);
}

module_init(isku_init);
module_exit(isku_exit);

MODULE_AUTHOR("Stefan Achatz");
MODULE_DESCRIPTION("USB Roccat Isku driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
d41c2a70 SA	1	/*
	2	* Roccat Isku 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 Isku is a gamer keyboard with 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-isku.h"
	28
	29	static struct class *isku_class;
	30
	31	static void isku_profile_activated(struct isku_device *isku, uint new_profile)
	32	{
	33	isku->actual_profile = new_profile;
	34	}
	35
	36	static int isku_receive(struct usb_device *usb_dev, uint command,
	37	void *buf, uint size)
	38	{
7392d73b	39	return roccat_common2_receive(usb_dev, command, buf, size);
d41c2a70 SA	40	}
d41c2a70 SA	41
d41c2a70 SA	42	static int isku_get_actual_profile(struct usb_device *usb_dev)
	43	{
	44	struct isku_actual_profile buf;
	45	int retval;
	46
	47	retval = isku_receive(usb_dev, ISKU_COMMAND_ACTUAL_PROFILE,
	48	&buf, sizeof(struct isku_actual_profile));
	49	return retval ? retval : buf.actual_profile;
	50	}
	51
	52	static int isku_set_actual_profile(struct usb_device *usb_dev, int new_profile)
	53	{
	54	struct isku_actual_profile buf;
	55
	56	buf.command = ISKU_COMMAND_ACTUAL_PROFILE;
	57	buf.size = sizeof(struct isku_actual_profile);
	58	buf.actual_profile = new_profile;
7392d73b	59	return roccat_common2_send_with_status(usb_dev,
4728f2dc	60	ISKU_COMMAND_ACTUAL_PROFILE, &buf,
d41c2a70 SA	61	sizeof(struct isku_actual_profile));
	62	}
	63
	64	static ssize_t isku_sysfs_show_actual_profile(struct device *dev,
	65	struct device_attribute attr, char buf)
	66	{
	67	struct isku_device *isku =
	68	hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
	69	return snprintf(buf, PAGE_SIZE, "%d\n", isku->actual_profile);
	70	}
	71
	72	static ssize_t isku_sysfs_set_actual_profile(struct device *dev,
	73	struct device_attribute attr, char const buf, size_t size)
	74	{
	75	struct isku_device *isku;
	76	struct usb_device *usb_dev;
	77	unsigned long profile;
	78	int retval;
	79	struct isku_roccat_report roccat_report;
	80
	81	dev = dev->parent->parent;
	82	isku = hid_get_drvdata(dev_get_drvdata(dev));
	83	usb_dev = interface_to_usbdev(to_usb_interface(dev));
	84
	85	retval = strict_strtoul(buf, 10, &profile);
	86	if (retval)
	87	return retval;
	88
	89	if (profile > 4)
	90	return -EINVAL;
	91
	92	mutex_lock(&isku->isku_lock);
	93
	94	retval = isku_set_actual_profile(usb_dev, profile);
	95	if (retval) {
	96	mutex_unlock(&isku->isku_lock);
	97	return retval;
	98	}
	99
	100	isku_profile_activated(isku, profile);
	101
	102	roccat_report.event = ISKU_REPORT_BUTTON_EVENT_PROFILE;
	103	roccat_report.data1 = profile + 1;
	104	roccat_report.data2 = 0;
	105	roccat_report.profile = profile + 1;
	106	roccat_report_event(isku->chrdev_minor, (uint8_t const *)&roccat_report);
	107
	108	mutex_unlock(&isku->isku_lock);
	109
	110	return size;
	111	}
	112
	113	static struct device_attribute isku_attributes[] = {
	114	__ATTR(actual_profile, 0660,
	115	isku_sysfs_show_actual_profile,
	116	isku_sysfs_set_actual_profile),
	117	__ATTR_NULL
	118	};
	119
	120	static ssize_t isku_sysfs_read(struct file fp, struct kobject kobj,
	121	char *buf, loff_t off, size_t count,
	122	size_t real_size, uint command)
	123	{
	124	struct device *dev =
125	container_of(kobj, struct device, kobj)->parent->parent;
126	struct isku_device *isku = hid_get_drvdata(dev_get_drvdata(dev));
127	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
128	int retval;
129
130	if (off >= real_size)
131	return 0;
132
133	if (off != 0 \|\| count != real_size)
134	return -EINVAL;
135
136	mutex_lock(&isku->isku_lock);
137	retval = isku_receive(usb_dev, command, buf, real_size);
138	mutex_unlock(&isku->isku_lock);
139
140	return retval ? retval : real_size;
141	}
142
143	static ssize_t isku_sysfs_write(struct file fp, struct kobject kobj,
144	void const *buf, loff_t off, size_t count,
145	size_t real_size, uint command)
146	{
147	struct device *dev =
148	container_of(kobj, struct device, kobj)->parent->parent;
149	struct isku_device *isku = hid_get_drvdata(dev_get_drvdata(dev));
150	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
151	int retval;
152
153	if (off != 0 \|\| count != real_size)
154	return -EINVAL;
155
156	mutex_lock(&isku->isku_lock);
7392d73b	157	retval = roccat_common2_send_with_status(usb_dev, command,
4728f2dc	158	(void *)buf, real_size);
d41c2a70 SA	159	mutex_unlock(&isku->isku_lock);
	160
	161	return retval ? retval : real_size;
	162	}
	163
	164	#define ISKU_SYSFS_W(thingy, THINGY) \
	165	static ssize_t isku_sysfs_write_ ## thingy(struct file fp, struct kobject kobj, \
	166	struct bin_attribute attr, char buf, \
	167	loff_t off, size_t count) \
	168	{ \
	169	return isku_sysfs_write(fp, kobj, buf, off, count, \
	170	sizeof(struct isku_ ## thingy), ISKU_COMMAND_ ## THINGY); \
	171	}
	172
	173	#define ISKU_SYSFS_R(thingy, THINGY) \
	174	static ssize_t isku_sysfs_read_ ## thingy(struct file fp, struct kobject kobj, \
	175	struct bin_attribute attr, char buf, \
	176	loff_t off, size_t count) \
	177	{ \
	178	return isku_sysfs_read(fp, kobj, buf, off, count, \
	179	sizeof(struct isku_ ## thingy), ISKU_COMMAND_ ## THINGY); \
	180	}
	181
	182	#define ISKU_SYSFS_RW(thingy, THINGY) \
	183	ISKU_SYSFS_R(thingy, THINGY) \
	184	ISKU_SYSFS_W(thingy, THINGY)
	185
	186	#define ISKU_BIN_ATTR_RW(thingy) \
	187	{ \
	188	.attr = { .name = #thingy, .mode = 0660 }, \
	189	.size = sizeof(struct isku_ ## thingy), \
	190	.read = isku_sysfs_read_ ## thingy, \
	191	.write = isku_sysfs_write_ ## thingy \
	192	}
	193
	194	#define ISKU_BIN_ATTR_R(thingy) \
	195	{ \
	196	.attr = { .name = #thingy, .mode = 0440 }, \
	197	.size = sizeof(struct isku_ ## thingy), \
	198	.read = isku_sysfs_read_ ## thingy, \
	199	}
	200
	201	#define ISKU_BIN_ATTR_W(thingy) \
	202	{ \
	203	.attr = { .name = #thingy, .mode = 0220 }, \
	204	.size = sizeof(struct isku_ ## thingy), \
	205	.write = isku_sysfs_write_ ## thingy \
	206	}
	207
	208	ISKU_SYSFS_RW(macro, MACRO)
	209	ISKU_SYSFS_RW(keys_function, KEYS_FUNCTION)
	210	ISKU_SYSFS_RW(keys_easyzone, KEYS_EASYZONE)
	211	ISKU_SYSFS_RW(keys_media, KEYS_MEDIA)
	212	ISKU_SYSFS_RW(keys_thumbster, KEYS_THUMBSTER)
	213	ISKU_SYSFS_RW(keys_macro, KEYS_MACRO)
	214	ISKU_SYSFS_RW(keys_capslock, KEYS_CAPSLOCK)
	215	ISKU_SYSFS_RW(light, LIGHT)
	216	ISKU_SYSFS_RW(key_mask, KEY_MASK)
	217	ISKU_SYSFS_RW(last_set, LAST_SET)
	218	ISKU_SYSFS_W(talk, TALK)
	219	ISKU_SYSFS_R(info, INFO)
	220	ISKU_SYSFS_W(control, CONTROL)
	221
	222	static struct bin_attribute isku_bin_attributes[] = {
223	ISKU_BIN_ATTR_RW(macro),
224	ISKU_BIN_ATTR_RW(keys_function),
225	ISKU_BIN_ATTR_RW(keys_easyzone),
226	ISKU_BIN_ATTR_RW(keys_media),
227	ISKU_BIN_ATTR_RW(keys_thumbster),
228	ISKU_BIN_ATTR_RW(keys_macro),
229	ISKU_BIN_ATTR_RW(keys_capslock),
230	ISKU_BIN_ATTR_RW(light),
231	ISKU_BIN_ATTR_RW(key_mask),
232	ISKU_BIN_ATTR_RW(last_set),
233	ISKU_BIN_ATTR_W(talk),
234	ISKU_BIN_ATTR_R(info),
235	ISKU_BIN_ATTR_W(control),
236	__ATTR_NULL
237	};
238
239	static int isku_init_isku_device_struct(struct usb_device *usb_dev,
240	struct isku_device *isku)
241	{
242	int retval;
243
244	mutex_init(&isku->isku_lock);
245
246	retval = isku_get_actual_profile(usb_dev);
247	if (retval < 0)
248	return retval;
249	isku_profile_activated(isku, retval);
250
251	return 0;
252	}
253
254	static int isku_init_specials(struct hid_device *hdev)
255	{
256	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
257	struct usb_device *usb_dev = interface_to_usbdev(intf);
258	struct isku_device *isku;
259	int retval;
260
261	if (intf->cur_altsetting->desc.bInterfaceProtocol
262	!= ISKU_USB_INTERFACE_PROTOCOL) {
263	hid_set_drvdata(hdev, NULL);
264	return 0;
265	}
266
267	isku = kzalloc(sizeof(*isku), GFP_KERNEL);
268	if (!isku) {
269	hid_err(hdev, "can't alloc device descriptor\n");
270	return -ENOMEM;
271	}
272	hid_set_drvdata(hdev, isku);
273
274	retval = isku_init_isku_device_struct(usb_dev, isku);
275	if (retval) {
276	hid_err(hdev, "couldn't init struct isku_device\n");
277	goto exit_free;
278	}
279
280	retval = roccat_connect(isku_class, hdev,
281	sizeof(struct isku_roccat_report));
282	if (retval < 0) {
283	hid_err(hdev, "couldn't init char dev\n");
284	} else {
285	isku->chrdev_minor = retval;
286	isku->roccat_claimed = 1;
287	}
288
289	return 0;
290	exit_free:
291	kfree(isku);
292	return retval;
293	}
294
295	static void isku_remove_specials(struct hid_device *hdev)
296	{
297	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
298	struct isku_device *isku;
299
300	if (intf->cur_altsetting->desc.bInterfaceProtocol
301	!= ISKU_USB_INTERFACE_PROTOCOL)
302	return;
303
304	isku = hid_get_drvdata(hdev);
305	if (isku->roccat_claimed)
306	roccat_disconnect(isku->chrdev_minor);
307	kfree(isku);
308	}
309
310	static int isku_probe(struct hid_device *hdev,
311	const struct hid_device_id *id)
312	{
313	int retval;
314
315	retval = hid_parse(hdev);
316	if (retval) {
317	hid_err(hdev, "parse failed\n");
318	goto exit;
319	}
320
321	retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
322	if (retval) {
323	hid_err(hdev, "hw start failed\n");
324	goto exit;
325	}
326
327	retval = isku_init_specials(hdev);
328	if (retval) {
329	hid_err(hdev, "couldn't install keyboard\n");
330	goto exit_stop;
331	}
332
333	return 0;
334
335	exit_stop:
336	hid_hw_stop(hdev);
337	exit:
338	return retval;
339	}
340
341	static void isku_remove(struct hid_device *hdev)
342	{
343	isku_remove_specials(hdev);
344	hid_hw_stop(hdev);
345	}
346
347	static void isku_keep_values_up_to_date(struct isku_device *isku,
348	u8 const *data)
349	{
350	struct isku_report_button const *button_report;
351
352	switch (data[0]) {
353	case ISKU_REPORT_NUMBER_BUTTON:
354	button_report = (struct isku_report_button const *)data;
355	switch (button_report->event) {
356	case ISKU_REPORT_BUTTON_EVENT_PROFILE:
357	isku_profile_activated(isku, button_report->data1 - 1);
358	break;
359	}
360	break;
361	}
362	}
363
364	static void isku_report_to_chrdev(struct isku_device const *isku,
365	u8 const *data)
366	{
367	struct isku_roccat_report roccat_report;
368	struct isku_report_button const *button_report;
369
370	if (data[0] != ISKU_REPORT_NUMBER_BUTTON)
371	return;
372
373	button_report = (struct isku_report_button const *)data;
374
375	roccat_report.event = button_report->event;
376	roccat_report.data1 = button_report->data1;
377	roccat_report.data2 = button_report->data2;
378	roccat_report.profile = isku->actual_profile + 1;
379	roccat_report_event(isku->chrdev_minor,
380	(uint8_t const *)&roccat_report);
381	}
382
383	static int isku_raw_event(struct hid_device *hdev,
384	struct hid_report report, u8 data, int size)
385	{
386	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
387	struct isku_device *isku = hid_get_drvdata(hdev);
388
389	if (intf->cur_altsetting->desc.bInterfaceProtocol
390	!= ISKU_USB_INTERFACE_PROTOCOL)
391	return 0;
392
393	if (isku == NULL)
394	return 0;
395
396	isku_keep_values_up_to_date(isku, data);
397
398	if (isku->roccat_claimed)
399	isku_report_to_chrdev(isku, data);
400
401	return 0;
402	}
403
404	static const struct hid_device_id isku_devices[] = {
405	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ISKU) },
406	{ }
407	};
408
409	MODULE_DEVICE_TABLE(hid, isku_devices);
410
411	static struct hid_driver isku_driver = {
412	.name = "isku",
413	.id_table = isku_devices,
414	.probe = isku_probe,
415	.remove = isku_remove,
416	.raw_event = isku_raw_event
417	};
418
419	static int __init isku_init(void)
420	{
421	int retval;
422	isku_class = class_create(THIS_MODULE, "isku");
423	if (IS_ERR(isku_class))
424	return PTR_ERR(isku_class);
425	isku_class->dev_attrs = isku_attributes;
426	isku_class->dev_bin_attrs = isku_bin_attributes;
427
428	retval = hid_register_driver(&isku_driver);
429	if (retval)
430	class_destroy(isku_class);
431	return retval;
432	}
433
434	static void __exit isku_exit(void)
435	{
436	hid_unregister_driver(&isku_driver);
437	class_destroy(isku_class);
438	}
439
440	module_init(isku_init);
441	module_exit(isku_exit);
442
443	MODULE_AUTHOR("Stefan Achatz");
444	MODULE_DESCRIPTION("USB Roccat Isku driver");
445	MODULE_LICENSE("GPL v2");