1 /*
2  * Roccat Kova[+] 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 Kova[+] is a bigger version of the Pyra with two more side buttons.
16  */
17 
18 #include <linux/device.h>
19 #include <linux/input.h>
20 #include <linux/hid.h>
21 #include <linux/module.h>
22 #include <linux/slab.h>
23 #include <linux/hid-roccat.h>
24 #include "hid-ids.h"
25 #include "hid-roccat-common.h"
26 #include "hid-roccat-kovaplus.h"
27 
28 static uint profile_numbers[5] = {0, 1, 2, 3, 4};
29 
30 static struct class *kovaplus_class;
31 
32 static uint kovaplus_convert_event_cpi(uint value)
33 {
34 	return (value == 7 ? 4 : (value == 4 ? 3 : value));
35 }
36 
37 static void kovaplus_profile_activated(struct kovaplus_device *kovaplus,
38 		uint new_profile_index)
39 {
40 	kovaplus->actual_profile = new_profile_index;
41 	kovaplus->actual_cpi = kovaplus->profile_settings[new_profile_index].cpi_startup_level;
42 	kovaplus->actual_x_sensitivity = kovaplus->profile_settings[new_profile_index].sensitivity_x;
43 	kovaplus->actual_y_sensitivity = kovaplus->profile_settings[new_profile_index].sensitivity_y;
44 }
45 
46 static int kovaplus_send_control(struct usb_device *usb_dev, uint value,
47 		enum kovaplus_control_requests request)
48 {
49 	int retval;
50 	struct roccat_common2_control control;
51 
52 	if ((request == KOVAPLUS_CONTROL_REQUEST_PROFILE_SETTINGS ||
53 			request == KOVAPLUS_CONTROL_REQUEST_PROFILE_BUTTONS) &&
54 			value > 4)
55 		return -EINVAL;
56 
57 	control.command = ROCCAT_COMMON_COMMAND_CONTROL;
58 	control.value = value;
59 	control.request = request;
60 
61 	retval = roccat_common2_send(usb_dev, ROCCAT_COMMON_COMMAND_CONTROL,
62 			&control, sizeof(struct roccat_common2_control));
63 
64 	return retval;
65 }
66 
67 static int kovaplus_select_profile(struct usb_device *usb_dev, uint number,
68 		enum kovaplus_control_requests request)
69 {
70 	return kovaplus_send_control(usb_dev, number, request);
71 }
72 
73 static int kovaplus_get_profile_settings(struct usb_device *usb_dev,
74 		struct kovaplus_profile_settings *buf, uint number)
75 {
76 	int retval;
77 
78 	retval = kovaplus_select_profile(usb_dev, number,
79 			KOVAPLUS_CONTROL_REQUEST_PROFILE_SETTINGS);
80 	if (retval)
81 		return retval;
82 
83 	return roccat_common2_receive(usb_dev, KOVAPLUS_COMMAND_PROFILE_SETTINGS,
84 			buf, KOVAPLUS_SIZE_PROFILE_SETTINGS);
85 }
86 
87 static int kovaplus_get_profile_buttons(struct usb_device *usb_dev,
88 		struct kovaplus_profile_buttons *buf, int number)
89 {
90 	int retval;
91 
92 	retval = kovaplus_select_profile(usb_dev, number,
93 			KOVAPLUS_CONTROL_REQUEST_PROFILE_BUTTONS);
94 	if (retval)
95 		return retval;
96 
97 	return roccat_common2_receive(usb_dev, KOVAPLUS_COMMAND_PROFILE_BUTTONS,
98 			buf, KOVAPLUS_SIZE_PROFILE_BUTTONS);
99 }
100 
101 /* retval is 0-4 on success, < 0 on error */
102 static int kovaplus_get_actual_profile(struct usb_device *usb_dev)
103 {
104 	struct kovaplus_actual_profile buf;
105 	int retval;
106 
107 	retval = roccat_common2_receive(usb_dev, KOVAPLUS_COMMAND_ACTUAL_PROFILE,
108 			&buf, sizeof(struct kovaplus_actual_profile));
109 
110 	return retval ? retval : buf.actual_profile;
111 }
112 
113 static int kovaplus_set_actual_profile(struct usb_device *usb_dev,
114 		int new_profile)
115 {
116 	struct kovaplus_actual_profile buf;
117 
118 	buf.command = KOVAPLUS_COMMAND_ACTUAL_PROFILE;
119 	buf.size = sizeof(struct kovaplus_actual_profile);
120 	buf.actual_profile = new_profile;
121 
122 	return roccat_common2_send_with_status(usb_dev,
123 			KOVAPLUS_COMMAND_ACTUAL_PROFILE,
124 			&buf, sizeof(struct kovaplus_actual_profile));
125 }
126 
127 static ssize_t kovaplus_sysfs_read(struct file *fp, struct kobject *kobj,
128 		char *buf, loff_t off, size_t count,
129 		size_t real_size, uint command)
130 {
131 	struct device *dev = kobj_to_dev(kobj)->parent->parent;
132 	struct kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
133 	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
134 	int retval;
135 
136 	if (off >= real_size)
137 		return 0;
138 
139 	if (off != 0 || count != real_size)
140 		return -EINVAL;
141 
142 	mutex_lock(&kovaplus->kovaplus_lock);
143 	retval = roccat_common2_receive(usb_dev, command, buf, real_size);
144 	mutex_unlock(&kovaplus->kovaplus_lock);
145 
146 	if (retval)
147 		return retval;
148 
149 	return real_size;
150 }
151 
152 static ssize_t kovaplus_sysfs_write(struct file *fp, struct kobject *kobj,
153 		void const *buf, loff_t off, size_t count,
154 		size_t real_size, uint command)
155 {
156 	struct device *dev = kobj_to_dev(kobj)->parent->parent;
157 	struct kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
158 	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
159 	int retval;
160 
161 	if (off != 0 || count != real_size)
162 		return -EINVAL;
163 
164 	mutex_lock(&kovaplus->kovaplus_lock);
165 	retval = roccat_common2_send_with_status(usb_dev, command,
166 			buf, real_size);
167 	mutex_unlock(&kovaplus->kovaplus_lock);
168 
169 	if (retval)
170 		return retval;
171 
172 	return real_size;
173 }
174 
175 #define KOVAPLUS_SYSFS_W(thingy, THINGY) \
176 static ssize_t kovaplus_sysfs_write_ ## thingy(struct file *fp, \
177 		struct kobject *kobj, struct bin_attribute *attr, char *buf, \
178 		loff_t off, size_t count) \
179 { \
180 	return kovaplus_sysfs_write(fp, kobj, buf, off, count, \
181 			KOVAPLUS_SIZE_ ## THINGY, KOVAPLUS_COMMAND_ ## THINGY); \
182 }
183 
184 #define KOVAPLUS_SYSFS_R(thingy, THINGY) \
185 static ssize_t kovaplus_sysfs_read_ ## thingy(struct file *fp, \
186 		struct kobject *kobj, struct bin_attribute *attr, char *buf, \
187 		loff_t off, size_t count) \
188 { \
189 	return kovaplus_sysfs_read(fp, kobj, buf, off, count, \
190 			KOVAPLUS_SIZE_ ## THINGY, KOVAPLUS_COMMAND_ ## THINGY); \
191 }
192 
193 #define KOVAPLUS_SYSFS_RW(thingy, THINGY) \
194 KOVAPLUS_SYSFS_W(thingy, THINGY) \
195 KOVAPLUS_SYSFS_R(thingy, THINGY)
196 
197 #define KOVAPLUS_BIN_ATTRIBUTE_RW(thingy, THINGY) \
198 KOVAPLUS_SYSFS_RW(thingy, THINGY); \
199 static struct bin_attribute bin_attr_##thingy = { \
200 	.attr = { .name = #thingy, .mode = 0660 }, \
201 	.size = KOVAPLUS_SIZE_ ## THINGY, \
202 	.read = kovaplus_sysfs_read_ ## thingy, \
203 	.write = kovaplus_sysfs_write_ ## thingy \
204 }
205 
206 #define KOVAPLUS_BIN_ATTRIBUTE_W(thingy, THINGY) \
207 KOVAPLUS_SYSFS_W(thingy, THINGY); \
208 static struct bin_attribute bin_attr_##thingy = { \
209 	.attr = { .name = #thingy, .mode = 0220 }, \
210 	.size = KOVAPLUS_SIZE_ ## THINGY, \
211 	.write = kovaplus_sysfs_write_ ## thingy \
212 }
213 KOVAPLUS_BIN_ATTRIBUTE_W(control, CONTROL);
214 KOVAPLUS_BIN_ATTRIBUTE_RW(info, INFO);
215 KOVAPLUS_BIN_ATTRIBUTE_RW(profile_settings, PROFILE_SETTINGS);
216 KOVAPLUS_BIN_ATTRIBUTE_RW(profile_buttons, PROFILE_BUTTONS);
217 
218 static ssize_t kovaplus_sysfs_read_profilex_settings(struct file *fp,
219 		struct kobject *kobj, struct bin_attribute *attr, char *buf,
220 		loff_t off, size_t count)
221 {
222 	struct device *dev = kobj_to_dev(kobj)->parent->parent;
223 	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
224 	ssize_t retval;
225 
226 	retval = kovaplus_select_profile(usb_dev, *(uint *)(attr->private),
227 			KOVAPLUS_CONTROL_REQUEST_PROFILE_SETTINGS);
228 	if (retval)
229 		return retval;
230 
231 	return kovaplus_sysfs_read(fp, kobj, buf, off, count,
232 			KOVAPLUS_SIZE_PROFILE_SETTINGS,
233 			KOVAPLUS_COMMAND_PROFILE_SETTINGS);
234 }
235 
236 static ssize_t kovaplus_sysfs_read_profilex_buttons(struct file *fp,
237 		struct kobject *kobj, struct bin_attribute *attr, char *buf,
238 		loff_t off, size_t count)
239 {
240 	struct device *dev = kobj_to_dev(kobj)->parent->parent;
241 	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
242 	ssize_t retval;
243 
244 	retval = kovaplus_select_profile(usb_dev, *(uint *)(attr->private),
245 			KOVAPLUS_CONTROL_REQUEST_PROFILE_BUTTONS);
246 	if (retval)
247 		return retval;
248 
249 	return kovaplus_sysfs_read(fp, kobj, buf, off, count,
250 			KOVAPLUS_SIZE_PROFILE_BUTTONS,
251 			KOVAPLUS_COMMAND_PROFILE_BUTTONS);
252 }
253 
254 #define PROFILE_ATTR(number)						\
255 static struct bin_attribute bin_attr_profile##number##_settings = {	\
256 	.attr = { .name = "profile" #number "_settings", .mode = 0440 },	\
257 	.size = KOVAPLUS_SIZE_PROFILE_SETTINGS,				\
258 	.read = kovaplus_sysfs_read_profilex_settings,			\
259 	.private = &profile_numbers[number-1],				\
260 };									\
261 static struct bin_attribute bin_attr_profile##number##_buttons = {	\
262 	.attr = { .name = "profile" #number "_buttons", .mode = 0440 },	\
263 	.size = KOVAPLUS_SIZE_PROFILE_BUTTONS,				\
264 	.read = kovaplus_sysfs_read_profilex_buttons,			\
265 	.private = &profile_numbers[number-1],				\
266 };
267 PROFILE_ATTR(1);
268 PROFILE_ATTR(2);
269 PROFILE_ATTR(3);
270 PROFILE_ATTR(4);
271 PROFILE_ATTR(5);
272 
273 static ssize_t kovaplus_sysfs_show_actual_profile(struct device *dev,
274 		struct device_attribute *attr, char *buf)
275 {
276 	struct kovaplus_device *kovaplus =
277 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
278 	return snprintf(buf, PAGE_SIZE, "%d\n", kovaplus->actual_profile);
279 }
280 
281 static ssize_t kovaplus_sysfs_set_actual_profile(struct device *dev,
282 		struct device_attribute *attr, char const *buf, size_t size)
283 {
284 	struct kovaplus_device *kovaplus;
285 	struct usb_device *usb_dev;
286 	unsigned long profile;
287 	int retval;
288 	struct kovaplus_roccat_report roccat_report;
289 
290 	dev = dev->parent->parent;
291 	kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
292 	usb_dev = interface_to_usbdev(to_usb_interface(dev));
293 
294 	retval = kstrtoul(buf, 10, &profile);
295 	if (retval)
296 		return retval;
297 
298 	if (profile >= 5)
299 		return -EINVAL;
300 
301 	mutex_lock(&kovaplus->kovaplus_lock);
302 	retval = kovaplus_set_actual_profile(usb_dev, profile);
303 	if (retval) {
304 		mutex_unlock(&kovaplus->kovaplus_lock);
305 		return retval;
306 	}
307 
308 	kovaplus_profile_activated(kovaplus, profile);
309 
310 	roccat_report.type = KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_PROFILE_1;
311 	roccat_report.profile = profile + 1;
312 	roccat_report.button = 0;
313 	roccat_report.data1 = profile + 1;
314 	roccat_report.data2 = 0;
315 	roccat_report_event(kovaplus->chrdev_minor,
316 			(uint8_t const *)&roccat_report);
317 
318 	mutex_unlock(&kovaplus->kovaplus_lock);
319 
320 	return size;
321 }
322 static DEVICE_ATTR(actual_profile, 0660,
323 		   kovaplus_sysfs_show_actual_profile,
324 		   kovaplus_sysfs_set_actual_profile);
325 
326 static ssize_t kovaplus_sysfs_show_actual_cpi(struct device *dev,
327 		struct device_attribute *attr, char *buf)
328 {
329 	struct kovaplus_device *kovaplus =
330 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
331 	return snprintf(buf, PAGE_SIZE, "%d\n", kovaplus->actual_cpi);
332 }
333 static DEVICE_ATTR(actual_cpi, 0440, kovaplus_sysfs_show_actual_cpi, NULL);
334 
335 static ssize_t kovaplus_sysfs_show_actual_sensitivity_x(struct device *dev,
336 		struct device_attribute *attr, char *buf)
337 {
338 	struct kovaplus_device *kovaplus =
339 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
340 	return snprintf(buf, PAGE_SIZE, "%d\n", kovaplus->actual_x_sensitivity);
341 }
342 static DEVICE_ATTR(actual_sensitivity_x, 0440,
343 		   kovaplus_sysfs_show_actual_sensitivity_x, NULL);
344 
345 static ssize_t kovaplus_sysfs_show_actual_sensitivity_y(struct device *dev,
346 		struct device_attribute *attr, char *buf)
347 {
348 	struct kovaplus_device *kovaplus =
349 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
350 	return snprintf(buf, PAGE_SIZE, "%d\n", kovaplus->actual_y_sensitivity);
351 }
352 static DEVICE_ATTR(actual_sensitivity_y, 0440,
353 		   kovaplus_sysfs_show_actual_sensitivity_y, NULL);
354 
355 static ssize_t kovaplus_sysfs_show_firmware_version(struct device *dev,
356 		struct device_attribute *attr, char *buf)
357 {
358 	struct kovaplus_device *kovaplus;
359 	struct usb_device *usb_dev;
360 	struct kovaplus_info info;
361 
362 	dev = dev->parent->parent;
363 	kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
364 	usb_dev = interface_to_usbdev(to_usb_interface(dev));
365 
366 	mutex_lock(&kovaplus->kovaplus_lock);
367 	roccat_common2_receive(usb_dev, KOVAPLUS_COMMAND_INFO,
368 			&info, KOVAPLUS_SIZE_INFO);
369 	mutex_unlock(&kovaplus->kovaplus_lock);
370 
371 	return snprintf(buf, PAGE_SIZE, "%d\n", info.firmware_version);
372 }
373 static DEVICE_ATTR(firmware_version, 0440,
374 		   kovaplus_sysfs_show_firmware_version, NULL);
375 
376 static struct attribute *kovaplus_attrs[] = {
377 	&dev_attr_actual_cpi.attr,
378 	&dev_attr_firmware_version.attr,
379 	&dev_attr_actual_profile.attr,
380 	&dev_attr_actual_sensitivity_x.attr,
381 	&dev_attr_actual_sensitivity_y.attr,
382 	NULL,
383 };
384 
385 static struct bin_attribute *kovaplus_bin_attributes[] = {
386 	&bin_attr_control,
387 	&bin_attr_info,
388 	&bin_attr_profile_settings,
389 	&bin_attr_profile_buttons,
390 	&bin_attr_profile1_settings,
391 	&bin_attr_profile2_settings,
392 	&bin_attr_profile3_settings,
393 	&bin_attr_profile4_settings,
394 	&bin_attr_profile5_settings,
395 	&bin_attr_profile1_buttons,
396 	&bin_attr_profile2_buttons,
397 	&bin_attr_profile3_buttons,
398 	&bin_attr_profile4_buttons,
399 	&bin_attr_profile5_buttons,
400 	NULL,
401 };
402 
403 static const struct attribute_group kovaplus_group = {
404 	.attrs = kovaplus_attrs,
405 	.bin_attrs = kovaplus_bin_attributes,
406 };
407 
408 static const struct attribute_group *kovaplus_groups[] = {
409 	&kovaplus_group,
410 	NULL,
411 };
412 
413 static int kovaplus_init_kovaplus_device_struct(struct usb_device *usb_dev,
414 		struct kovaplus_device *kovaplus)
415 {
416 	int retval, i;
417 	static uint wait = 70; /* device will freeze with just 60 */
418 
419 	mutex_init(&kovaplus->kovaplus_lock);
420 
421 	for (i = 0; i < 5; ++i) {
422 		msleep(wait);
423 		retval = kovaplus_get_profile_settings(usb_dev,
424 				&kovaplus->profile_settings[i], i);
425 		if (retval)
426 			return retval;
427 
428 		msleep(wait);
429 		retval = kovaplus_get_profile_buttons(usb_dev,
430 				&kovaplus->profile_buttons[i], i);
431 		if (retval)
432 			return retval;
433 	}
434 
435 	msleep(wait);
436 	retval = kovaplus_get_actual_profile(usb_dev);
437 	if (retval < 0)
438 		return retval;
439 	kovaplus_profile_activated(kovaplus, retval);
440 
441 	return 0;
442 }
443 
444 static int kovaplus_init_specials(struct hid_device *hdev)
445 {
446 	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
447 	struct usb_device *usb_dev = interface_to_usbdev(intf);
448 	struct kovaplus_device *kovaplus;
449 	int retval;
450 
451 	if (intf->cur_altsetting->desc.bInterfaceProtocol
452 			== USB_INTERFACE_PROTOCOL_MOUSE) {
453 
454 		kovaplus = kzalloc(sizeof(*kovaplus), GFP_KERNEL);
455 		if (!kovaplus) {
456 			hid_err(hdev, "can't alloc device descriptor\n");
457 			return -ENOMEM;
458 		}
459 		hid_set_drvdata(hdev, kovaplus);
460 
461 		retval = kovaplus_init_kovaplus_device_struct(usb_dev, kovaplus);
462 		if (retval) {
463 			hid_err(hdev, "couldn't init struct kovaplus_device\n");
464 			goto exit_free;
465 		}
466 
467 		retval = roccat_connect(kovaplus_class, hdev,
468 				sizeof(struct kovaplus_roccat_report));
469 		if (retval < 0) {
470 			hid_err(hdev, "couldn't init char dev\n");
471 		} else {
472 			kovaplus->chrdev_minor = retval;
473 			kovaplus->roccat_claimed = 1;
474 		}
475 
476 	} else {
477 		hid_set_drvdata(hdev, NULL);
478 	}
479 
480 	return 0;
481 exit_free:
482 	kfree(kovaplus);
483 	return retval;
484 }
485 
486 static void kovaplus_remove_specials(struct hid_device *hdev)
487 {
488 	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
489 	struct kovaplus_device *kovaplus;
490 
491 	if (intf->cur_altsetting->desc.bInterfaceProtocol
492 			== USB_INTERFACE_PROTOCOL_MOUSE) {
493 		kovaplus = hid_get_drvdata(hdev);
494 		if (kovaplus->roccat_claimed)
495 			roccat_disconnect(kovaplus->chrdev_minor);
496 		kfree(kovaplus);
497 	}
498 }
499 
500 static int kovaplus_probe(struct hid_device *hdev,
501 		const struct hid_device_id *id)
502 {
503 	int retval;
504 
505 	retval = hid_parse(hdev);
506 	if (retval) {
507 		hid_err(hdev, "parse failed\n");
508 		goto exit;
509 	}
510 
511 	retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
512 	if (retval) {
513 		hid_err(hdev, "hw start failed\n");
514 		goto exit;
515 	}
516 
517 	retval = kovaplus_init_specials(hdev);
518 	if (retval) {
519 		hid_err(hdev, "couldn't install mouse\n");
520 		goto exit_stop;
521 	}
522 
523 	return 0;
524 
525 exit_stop:
526 	hid_hw_stop(hdev);
527 exit:
528 	return retval;
529 }
530 
531 static void kovaplus_remove(struct hid_device *hdev)
532 {
533 	kovaplus_remove_specials(hdev);
534 	hid_hw_stop(hdev);
535 }
536 
537 static void kovaplus_keep_values_up_to_date(struct kovaplus_device *kovaplus,
538 		u8 const *data)
539 {
540 	struct kovaplus_mouse_report_button const *button_report;
541 
542 	if (data[0] != KOVAPLUS_MOUSE_REPORT_NUMBER_BUTTON)
543 		return;
544 
545 	button_report = (struct kovaplus_mouse_report_button const *)data;
546 
547 	switch (button_report->type) {
548 	case KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_PROFILE_1:
549 		kovaplus_profile_activated(kovaplus, button_report->data1 - 1);
550 		break;
551 	case KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_CPI:
552 		kovaplus->actual_cpi = kovaplus_convert_event_cpi(button_report->data1);
553 		break;
554 	case KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_SENSITIVITY:
555 		kovaplus->actual_x_sensitivity = button_report->data1;
556 		kovaplus->actual_y_sensitivity = button_report->data2;
557 		break;
558 	default:
559 		break;
560 	}
561 }
562 
563 static void kovaplus_report_to_chrdev(struct kovaplus_device const *kovaplus,
564 		u8 const *data)
565 {
566 	struct kovaplus_roccat_report roccat_report;
567 	struct kovaplus_mouse_report_button const *button_report;
568 
569 	if (data[0] != KOVAPLUS_MOUSE_REPORT_NUMBER_BUTTON)
570 		return;
571 
572 	button_report = (struct kovaplus_mouse_report_button const *)data;
573 
574 	if (button_report->type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_PROFILE_2)
575 		return;
576 
577 	roccat_report.type = button_report->type;
578 	roccat_report.profile = kovaplus->actual_profile + 1;
579 
580 	if (roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_MACRO ||
581 			roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_SHORTCUT ||
582 			roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_QUICKLAUNCH ||
583 			roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_TIMER)
584 		roccat_report.button = button_report->data1;
585 	else
586 		roccat_report.button = 0;
587 
588 	if (roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_CPI)
589 		roccat_report.data1 = kovaplus_convert_event_cpi(button_report->data1);
590 	else
591 		roccat_report.data1 = button_report->data1;
592 
593 	roccat_report.data2 = button_report->data2;
594 
595 	roccat_report_event(kovaplus->chrdev_minor,
596 			(uint8_t const *)&roccat_report);
597 }
598 
599 static int kovaplus_raw_event(struct hid_device *hdev,
600 		struct hid_report *report, u8 *data, int size)
601 {
602 	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
603 	struct kovaplus_device *kovaplus = hid_get_drvdata(hdev);
604 
605 	if (intf->cur_altsetting->desc.bInterfaceProtocol
606 			!= USB_INTERFACE_PROTOCOL_MOUSE)
607 		return 0;
608 
609 	if (kovaplus == NULL)
610 		return 0;
611 
612 	kovaplus_keep_values_up_to_date(kovaplus, data);
613 
614 	if (kovaplus->roccat_claimed)
615 		kovaplus_report_to_chrdev(kovaplus, data);
616 
617 	return 0;
618 }
619 
620 static const struct hid_device_id kovaplus_devices[] = {
621 	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KOVAPLUS) },
622 	{ }
623 };
624 
625 MODULE_DEVICE_TABLE(hid, kovaplus_devices);
626 
627 static struct hid_driver kovaplus_driver = {
628 		.name = "kovaplus",
629 		.id_table = kovaplus_devices,
630 		.probe = kovaplus_probe,
631 		.remove = kovaplus_remove,
632 		.raw_event = kovaplus_raw_event
633 };
634 
635 static int __init kovaplus_init(void)
636 {
637 	int retval;
638 
639 	kovaplus_class = class_create(THIS_MODULE, "kovaplus");
640 	if (IS_ERR(kovaplus_class))
641 		return PTR_ERR(kovaplus_class);
642 	kovaplus_class->dev_groups = kovaplus_groups;
643 
644 	retval = hid_register_driver(&kovaplus_driver);
645 	if (retval)
646 		class_destroy(kovaplus_class);
647 	return retval;
648 }
649 
650 static void __exit kovaplus_exit(void)
651 {
652 	hid_unregister_driver(&kovaplus_driver);
653 	class_destroy(kovaplus_class);
654 }
655 
656 module_init(kovaplus_init);
657 module_exit(kovaplus_exit);
658 
659 MODULE_AUTHOR("Stefan Achatz");
660 MODULE_DESCRIPTION("USB Roccat Kova[+] driver");
661 MODULE_LICENSE("GPL v2");
662