1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Roccat Kova[+] driver for Linux
4  *
5  * Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net>
6  */
7 
8 /*
9  */
10 
11 /*
12  * Roccat Kova[+] is a bigger version of the Pyra with two more side buttons.
13  */
14 
15 #include <linux/device.h>
16 #include <linux/input.h>
17 #include <linux/hid.h>
18 #include <linux/module.h>
19 #include <linux/slab.h>
20 #include <linux/hid-roccat.h>
21 #include "hid-ids.h"
22 #include "hid-roccat-common.h"
23 #include "hid-roccat-kovaplus.h"
24 
25 static uint profile_numbers[5] = {0, 1, 2, 3, 4};
26 
27 static struct class *kovaplus_class;
28 
kovaplus_convert_event_cpi(uint value)29 static uint kovaplus_convert_event_cpi(uint value)
30 {
31 	return (value == 7 ? 4 : (value == 4 ? 3 : value));
32 }
33 
kovaplus_profile_activated(struct kovaplus_device * kovaplus,uint new_profile_index)34 static void kovaplus_profile_activated(struct kovaplus_device *kovaplus,
35 		uint new_profile_index)
36 {
37 	if (new_profile_index >= ARRAY_SIZE(kovaplus->profile_settings))
38 		return;
39 	kovaplus->actual_profile = new_profile_index;
40 	kovaplus->actual_cpi = kovaplus->profile_settings[new_profile_index].cpi_startup_level;
41 	kovaplus->actual_x_sensitivity = kovaplus->profile_settings[new_profile_index].sensitivity_x;
42 	kovaplus->actual_y_sensitivity = kovaplus->profile_settings[new_profile_index].sensitivity_y;
43 }
44 
kovaplus_send_control(struct usb_device * usb_dev,uint value,enum kovaplus_control_requests request)45 static int kovaplus_send_control(struct usb_device *usb_dev, uint value,
46 		enum kovaplus_control_requests request)
47 {
48 	int retval;
49 	struct roccat_common2_control control;
50 
51 	if ((request == KOVAPLUS_CONTROL_REQUEST_PROFILE_SETTINGS ||
52 			request == KOVAPLUS_CONTROL_REQUEST_PROFILE_BUTTONS) &&
53 			value > 4)
54 		return -EINVAL;
55 
56 	control.command = ROCCAT_COMMON_COMMAND_CONTROL;
57 	control.value = value;
58 	control.request = request;
59 
60 	retval = roccat_common2_send(usb_dev, ROCCAT_COMMON_COMMAND_CONTROL,
61 			&control, sizeof(struct roccat_common2_control));
62 
63 	return retval;
64 }
65 
kovaplus_select_profile(struct usb_device * usb_dev,uint number,enum kovaplus_control_requests request)66 static int kovaplus_select_profile(struct usb_device *usb_dev, uint number,
67 		enum kovaplus_control_requests request)
68 {
69 	return kovaplus_send_control(usb_dev, number, request);
70 }
71 
kovaplus_get_profile_settings(struct usb_device * usb_dev,struct kovaplus_profile_settings * buf,uint number)72 static int kovaplus_get_profile_settings(struct usb_device *usb_dev,
73 		struct kovaplus_profile_settings *buf, uint number)
74 {
75 	int retval;
76 
77 	retval = kovaplus_select_profile(usb_dev, number,
78 			KOVAPLUS_CONTROL_REQUEST_PROFILE_SETTINGS);
79 	if (retval)
80 		return retval;
81 
82 	return roccat_common2_receive(usb_dev, KOVAPLUS_COMMAND_PROFILE_SETTINGS,
83 			buf, KOVAPLUS_SIZE_PROFILE_SETTINGS);
84 }
85 
kovaplus_get_profile_buttons(struct usb_device * usb_dev,struct kovaplus_profile_buttons * buf,int number)86 static int kovaplus_get_profile_buttons(struct usb_device *usb_dev,
87 		struct kovaplus_profile_buttons *buf, int number)
88 {
89 	int retval;
90 
91 	retval = kovaplus_select_profile(usb_dev, number,
92 			KOVAPLUS_CONTROL_REQUEST_PROFILE_BUTTONS);
93 	if (retval)
94 		return retval;
95 
96 	return roccat_common2_receive(usb_dev, KOVAPLUS_COMMAND_PROFILE_BUTTONS,
97 			buf, KOVAPLUS_SIZE_PROFILE_BUTTONS);
98 }
99 
100 /* retval is 0-4 on success, < 0 on error */
kovaplus_get_actual_profile(struct usb_device * usb_dev)101 static int kovaplus_get_actual_profile(struct usb_device *usb_dev)
102 {
103 	struct kovaplus_actual_profile buf;
104 	int retval;
105 
106 	retval = roccat_common2_receive(usb_dev, KOVAPLUS_COMMAND_ACTUAL_PROFILE,
107 			&buf, sizeof(struct kovaplus_actual_profile));
108 
109 	return retval ? retval : buf.actual_profile;
110 }
111 
kovaplus_set_actual_profile(struct usb_device * usb_dev,int new_profile)112 static int kovaplus_set_actual_profile(struct usb_device *usb_dev,
113 		int new_profile)
114 {
115 	struct kovaplus_actual_profile buf;
116 
117 	buf.command = KOVAPLUS_COMMAND_ACTUAL_PROFILE;
118 	buf.size = sizeof(struct kovaplus_actual_profile);
119 	buf.actual_profile = new_profile;
120 
121 	return roccat_common2_send_with_status(usb_dev,
122 			KOVAPLUS_COMMAND_ACTUAL_PROFILE,
123 			&buf, sizeof(struct kovaplus_actual_profile));
124 }
125 
kovaplus_sysfs_read(struct file * fp,struct kobject * kobj,char * buf,loff_t off,size_t count,size_t real_size,uint command)126 static ssize_t kovaplus_sysfs_read(struct file *fp, struct kobject *kobj,
127 		char *buf, loff_t off, size_t count,
128 		size_t real_size, uint command)
129 {
130 	struct device *dev = kobj_to_dev(kobj)->parent->parent;
131 	struct kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
132 	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
133 	int retval;
134 
135 	if (off >= real_size)
136 		return 0;
137 
138 	if (off != 0 || count != real_size)
139 		return -EINVAL;
140 
141 	mutex_lock(&kovaplus->kovaplus_lock);
142 	retval = roccat_common2_receive(usb_dev, command, buf, real_size);
143 	mutex_unlock(&kovaplus->kovaplus_lock);
144 
145 	if (retval)
146 		return retval;
147 
148 	return real_size;
149 }
150 
kovaplus_sysfs_write(struct file * fp,struct kobject * kobj,void const * buf,loff_t off,size_t count,size_t real_size,uint command)151 static ssize_t kovaplus_sysfs_write(struct file *fp, struct kobject *kobj,
152 		void const *buf, loff_t off, size_t count,
153 		size_t real_size, uint command)
154 {
155 	struct device *dev = kobj_to_dev(kobj)->parent->parent;
156 	struct kovaplus_device *kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
157 	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
158 	int retval;
159 
160 	if (off != 0 || count != real_size)
161 		return -EINVAL;
162 
163 	mutex_lock(&kovaplus->kovaplus_lock);
164 	retval = roccat_common2_send_with_status(usb_dev, command,
165 			buf, real_size);
166 	mutex_unlock(&kovaplus->kovaplus_lock);
167 
168 	if (retval)
169 		return retval;
170 
171 	return real_size;
172 }
173 
174 #define KOVAPLUS_SYSFS_W(thingy, THINGY) \
175 static ssize_t kovaplus_sysfs_write_ ## thingy(struct file *fp, \
176 		struct kobject *kobj, struct bin_attribute *attr, char *buf, \
177 		loff_t off, size_t count) \
178 { \
179 	return kovaplus_sysfs_write(fp, kobj, buf, off, count, \
180 			KOVAPLUS_SIZE_ ## THINGY, KOVAPLUS_COMMAND_ ## THINGY); \
181 }
182 
183 #define KOVAPLUS_SYSFS_R(thingy, THINGY) \
184 static ssize_t kovaplus_sysfs_read_ ## thingy(struct file *fp, \
185 		struct kobject *kobj, struct bin_attribute *attr, char *buf, \
186 		loff_t off, size_t count) \
187 { \
188 	return kovaplus_sysfs_read(fp, kobj, buf, off, count, \
189 			KOVAPLUS_SIZE_ ## THINGY, KOVAPLUS_COMMAND_ ## THINGY); \
190 }
191 
192 #define KOVAPLUS_SYSFS_RW(thingy, THINGY) \
193 KOVAPLUS_SYSFS_W(thingy, THINGY) \
194 KOVAPLUS_SYSFS_R(thingy, THINGY)
195 
196 #define KOVAPLUS_BIN_ATTRIBUTE_RW(thingy, THINGY) \
197 KOVAPLUS_SYSFS_RW(thingy, THINGY); \
198 static struct bin_attribute bin_attr_##thingy = { \
199 	.attr = { .name = #thingy, .mode = 0660 }, \
200 	.size = KOVAPLUS_SIZE_ ## THINGY, \
201 	.read = kovaplus_sysfs_read_ ## thingy, \
202 	.write = kovaplus_sysfs_write_ ## thingy \
203 }
204 
205 #define KOVAPLUS_BIN_ATTRIBUTE_W(thingy, THINGY) \
206 KOVAPLUS_SYSFS_W(thingy, THINGY); \
207 static struct bin_attribute bin_attr_##thingy = { \
208 	.attr = { .name = #thingy, .mode = 0220 }, \
209 	.size = KOVAPLUS_SIZE_ ## THINGY, \
210 	.write = kovaplus_sysfs_write_ ## thingy \
211 }
212 KOVAPLUS_BIN_ATTRIBUTE_W(control, CONTROL);
213 KOVAPLUS_BIN_ATTRIBUTE_RW(info, INFO);
214 KOVAPLUS_BIN_ATTRIBUTE_RW(profile_settings, PROFILE_SETTINGS);
215 KOVAPLUS_BIN_ATTRIBUTE_RW(profile_buttons, PROFILE_BUTTONS);
216 
kovaplus_sysfs_read_profilex_settings(struct file * fp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)217 static ssize_t kovaplus_sysfs_read_profilex_settings(struct file *fp,
218 		struct kobject *kobj, struct bin_attribute *attr, char *buf,
219 		loff_t off, size_t count)
220 {
221 	struct device *dev = kobj_to_dev(kobj)->parent->parent;
222 	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
223 	ssize_t retval;
224 
225 	retval = kovaplus_select_profile(usb_dev, *(uint *)(attr->private),
226 			KOVAPLUS_CONTROL_REQUEST_PROFILE_SETTINGS);
227 	if (retval)
228 		return retval;
229 
230 	return kovaplus_sysfs_read(fp, kobj, buf, off, count,
231 			KOVAPLUS_SIZE_PROFILE_SETTINGS,
232 			KOVAPLUS_COMMAND_PROFILE_SETTINGS);
233 }
234 
kovaplus_sysfs_read_profilex_buttons(struct file * fp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)235 static ssize_t kovaplus_sysfs_read_profilex_buttons(struct file *fp,
236 		struct kobject *kobj, struct bin_attribute *attr, char *buf,
237 		loff_t off, size_t count)
238 {
239 	struct device *dev = kobj_to_dev(kobj)->parent->parent;
240 	struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
241 	ssize_t retval;
242 
243 	retval = kovaplus_select_profile(usb_dev, *(uint *)(attr->private),
244 			KOVAPLUS_CONTROL_REQUEST_PROFILE_BUTTONS);
245 	if (retval)
246 		return retval;
247 
248 	return kovaplus_sysfs_read(fp, kobj, buf, off, count,
249 			KOVAPLUS_SIZE_PROFILE_BUTTONS,
250 			KOVAPLUS_COMMAND_PROFILE_BUTTONS);
251 }
252 
253 #define PROFILE_ATTR(number)						\
254 static struct bin_attribute bin_attr_profile##number##_settings = {	\
255 	.attr = { .name = "profile" #number "_settings", .mode = 0440 },	\
256 	.size = KOVAPLUS_SIZE_PROFILE_SETTINGS,				\
257 	.read = kovaplus_sysfs_read_profilex_settings,			\
258 	.private = &profile_numbers[number-1],				\
259 };									\
260 static struct bin_attribute bin_attr_profile##number##_buttons = {	\
261 	.attr = { .name = "profile" #number "_buttons", .mode = 0440 },	\
262 	.size = KOVAPLUS_SIZE_PROFILE_BUTTONS,				\
263 	.read = kovaplus_sysfs_read_profilex_buttons,			\
264 	.private = &profile_numbers[number-1],				\
265 };
266 PROFILE_ATTR(1);
267 PROFILE_ATTR(2);
268 PROFILE_ATTR(3);
269 PROFILE_ATTR(4);
270 PROFILE_ATTR(5);
271 
kovaplus_sysfs_show_actual_profile(struct device * dev,struct device_attribute * attr,char * buf)272 static ssize_t kovaplus_sysfs_show_actual_profile(struct device *dev,
273 		struct device_attribute *attr, char *buf)
274 {
275 	struct kovaplus_device *kovaplus =
276 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
277 	return snprintf(buf, PAGE_SIZE, "%d\n", kovaplus->actual_profile);
278 }
279 
kovaplus_sysfs_set_actual_profile(struct device * dev,struct device_attribute * attr,char const * buf,size_t size)280 static ssize_t kovaplus_sysfs_set_actual_profile(struct device *dev,
281 		struct device_attribute *attr, char const *buf, size_t size)
282 {
283 	struct kovaplus_device *kovaplus;
284 	struct usb_device *usb_dev;
285 	unsigned long profile;
286 	int retval;
287 	struct kovaplus_roccat_report roccat_report;
288 
289 	dev = dev->parent->parent;
290 	kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
291 	usb_dev = interface_to_usbdev(to_usb_interface(dev));
292 
293 	retval = kstrtoul(buf, 10, &profile);
294 	if (retval)
295 		return retval;
296 
297 	if (profile >= 5)
298 		return -EINVAL;
299 
300 	mutex_lock(&kovaplus->kovaplus_lock);
301 	retval = kovaplus_set_actual_profile(usb_dev, profile);
302 	if (retval) {
303 		mutex_unlock(&kovaplus->kovaplus_lock);
304 		return retval;
305 	}
306 
307 	kovaplus_profile_activated(kovaplus, profile);
308 
309 	roccat_report.type = KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_PROFILE_1;
310 	roccat_report.profile = profile + 1;
311 	roccat_report.button = 0;
312 	roccat_report.data1 = profile + 1;
313 	roccat_report.data2 = 0;
314 	roccat_report_event(kovaplus->chrdev_minor,
315 			(uint8_t const *)&roccat_report);
316 
317 	mutex_unlock(&kovaplus->kovaplus_lock);
318 
319 	return size;
320 }
321 static DEVICE_ATTR(actual_profile, 0660,
322 		   kovaplus_sysfs_show_actual_profile,
323 		   kovaplus_sysfs_set_actual_profile);
324 
kovaplus_sysfs_show_actual_cpi(struct device * dev,struct device_attribute * attr,char * buf)325 static ssize_t kovaplus_sysfs_show_actual_cpi(struct device *dev,
326 		struct device_attribute *attr, char *buf)
327 {
328 	struct kovaplus_device *kovaplus =
329 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
330 	return snprintf(buf, PAGE_SIZE, "%d\n", kovaplus->actual_cpi);
331 }
332 static DEVICE_ATTR(actual_cpi, 0440, kovaplus_sysfs_show_actual_cpi, NULL);
333 
kovaplus_sysfs_show_actual_sensitivity_x(struct device * dev,struct device_attribute * attr,char * buf)334 static ssize_t kovaplus_sysfs_show_actual_sensitivity_x(struct device *dev,
335 		struct device_attribute *attr, char *buf)
336 {
337 	struct kovaplus_device *kovaplus =
338 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
339 	return snprintf(buf, PAGE_SIZE, "%d\n", kovaplus->actual_x_sensitivity);
340 }
341 static DEVICE_ATTR(actual_sensitivity_x, 0440,
342 		   kovaplus_sysfs_show_actual_sensitivity_x, NULL);
343 
kovaplus_sysfs_show_actual_sensitivity_y(struct device * dev,struct device_attribute * attr,char * buf)344 static ssize_t kovaplus_sysfs_show_actual_sensitivity_y(struct device *dev,
345 		struct device_attribute *attr, char *buf)
346 {
347 	struct kovaplus_device *kovaplus =
348 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
349 	return snprintf(buf, PAGE_SIZE, "%d\n", kovaplus->actual_y_sensitivity);
350 }
351 static DEVICE_ATTR(actual_sensitivity_y, 0440,
352 		   kovaplus_sysfs_show_actual_sensitivity_y, NULL);
353 
kovaplus_sysfs_show_firmware_version(struct device * dev,struct device_attribute * attr,char * buf)354 static ssize_t kovaplus_sysfs_show_firmware_version(struct device *dev,
355 		struct device_attribute *attr, char *buf)
356 {
357 	struct kovaplus_device *kovaplus;
358 	struct usb_device *usb_dev;
359 	struct kovaplus_info info;
360 
361 	dev = dev->parent->parent;
362 	kovaplus = hid_get_drvdata(dev_get_drvdata(dev));
363 	usb_dev = interface_to_usbdev(to_usb_interface(dev));
364 
365 	mutex_lock(&kovaplus->kovaplus_lock);
366 	roccat_common2_receive(usb_dev, KOVAPLUS_COMMAND_INFO,
367 			&info, KOVAPLUS_SIZE_INFO);
368 	mutex_unlock(&kovaplus->kovaplus_lock);
369 
370 	return snprintf(buf, PAGE_SIZE, "%d\n", info.firmware_version);
371 }
372 static DEVICE_ATTR(firmware_version, 0440,
373 		   kovaplus_sysfs_show_firmware_version, NULL);
374 
375 static struct attribute *kovaplus_attrs[] = {
376 	&dev_attr_actual_cpi.attr,
377 	&dev_attr_firmware_version.attr,
378 	&dev_attr_actual_profile.attr,
379 	&dev_attr_actual_sensitivity_x.attr,
380 	&dev_attr_actual_sensitivity_y.attr,
381 	NULL,
382 };
383 
384 static struct bin_attribute *kovaplus_bin_attributes[] = {
385 	&bin_attr_control,
386 	&bin_attr_info,
387 	&bin_attr_profile_settings,
388 	&bin_attr_profile_buttons,
389 	&bin_attr_profile1_settings,
390 	&bin_attr_profile2_settings,
391 	&bin_attr_profile3_settings,
392 	&bin_attr_profile4_settings,
393 	&bin_attr_profile5_settings,
394 	&bin_attr_profile1_buttons,
395 	&bin_attr_profile2_buttons,
396 	&bin_attr_profile3_buttons,
397 	&bin_attr_profile4_buttons,
398 	&bin_attr_profile5_buttons,
399 	NULL,
400 };
401 
402 static const struct attribute_group kovaplus_group = {
403 	.attrs = kovaplus_attrs,
404 	.bin_attrs = kovaplus_bin_attributes,
405 };
406 
407 static const struct attribute_group *kovaplus_groups[] = {
408 	&kovaplus_group,
409 	NULL,
410 };
411 
kovaplus_init_kovaplus_device_struct(struct usb_device * usb_dev,struct kovaplus_device * kovaplus)412 static int kovaplus_init_kovaplus_device_struct(struct usb_device *usb_dev,
413 		struct kovaplus_device *kovaplus)
414 {
415 	int retval, i;
416 	static uint wait = 70; /* device will freeze with just 60 */
417 
418 	mutex_init(&kovaplus->kovaplus_lock);
419 
420 	for (i = 0; i < 5; ++i) {
421 		msleep(wait);
422 		retval = kovaplus_get_profile_settings(usb_dev,
423 				&kovaplus->profile_settings[i], i);
424 		if (retval)
425 			return retval;
426 
427 		msleep(wait);
428 		retval = kovaplus_get_profile_buttons(usb_dev,
429 				&kovaplus->profile_buttons[i], i);
430 		if (retval)
431 			return retval;
432 	}
433 
434 	msleep(wait);
435 	retval = kovaplus_get_actual_profile(usb_dev);
436 	if (retval < 0)
437 		return retval;
438 	kovaplus_profile_activated(kovaplus, retval);
439 
440 	return 0;
441 }
442 
kovaplus_init_specials(struct hid_device * hdev)443 static int kovaplus_init_specials(struct hid_device *hdev)
444 {
445 	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
446 	struct usb_device *usb_dev = interface_to_usbdev(intf);
447 	struct kovaplus_device *kovaplus;
448 	int retval;
449 
450 	if (intf->cur_altsetting->desc.bInterfaceProtocol
451 			== USB_INTERFACE_PROTOCOL_MOUSE) {
452 
453 		kovaplus = kzalloc(sizeof(*kovaplus), GFP_KERNEL);
454 		if (!kovaplus) {
455 			hid_err(hdev, "can't alloc device descriptor\n");
456 			return -ENOMEM;
457 		}
458 		hid_set_drvdata(hdev, kovaplus);
459 
460 		retval = kovaplus_init_kovaplus_device_struct(usb_dev, kovaplus);
461 		if (retval) {
462 			hid_err(hdev, "couldn't init struct kovaplus_device\n");
463 			goto exit_free;
464 		}
465 
466 		retval = roccat_connect(kovaplus_class, hdev,
467 				sizeof(struct kovaplus_roccat_report));
468 		if (retval < 0) {
469 			hid_err(hdev, "couldn't init char dev\n");
470 		} else {
471 			kovaplus->chrdev_minor = retval;
472 			kovaplus->roccat_claimed = 1;
473 		}
474 
475 	} else {
476 		hid_set_drvdata(hdev, NULL);
477 	}
478 
479 	return 0;
480 exit_free:
481 	kfree(kovaplus);
482 	return retval;
483 }
484 
kovaplus_remove_specials(struct hid_device * hdev)485 static void kovaplus_remove_specials(struct hid_device *hdev)
486 {
487 	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
488 	struct kovaplus_device *kovaplus;
489 
490 	if (intf->cur_altsetting->desc.bInterfaceProtocol
491 			== USB_INTERFACE_PROTOCOL_MOUSE) {
492 		kovaplus = hid_get_drvdata(hdev);
493 		if (kovaplus->roccat_claimed)
494 			roccat_disconnect(kovaplus->chrdev_minor);
495 		kfree(kovaplus);
496 	}
497 }
498 
kovaplus_probe(struct hid_device * hdev,const struct hid_device_id * id)499 static int kovaplus_probe(struct hid_device *hdev,
500 		const struct hid_device_id *id)
501 {
502 	int retval;
503 
504 	retval = hid_parse(hdev);
505 	if (retval) {
506 		hid_err(hdev, "parse failed\n");
507 		goto exit;
508 	}
509 
510 	retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
511 	if (retval) {
512 		hid_err(hdev, "hw start failed\n");
513 		goto exit;
514 	}
515 
516 	retval = kovaplus_init_specials(hdev);
517 	if (retval) {
518 		hid_err(hdev, "couldn't install mouse\n");
519 		goto exit_stop;
520 	}
521 
522 	return 0;
523 
524 exit_stop:
525 	hid_hw_stop(hdev);
526 exit:
527 	return retval;
528 }
529 
kovaplus_remove(struct hid_device * hdev)530 static void kovaplus_remove(struct hid_device *hdev)
531 {
532 	kovaplus_remove_specials(hdev);
533 	hid_hw_stop(hdev);
534 }
535 
kovaplus_keep_values_up_to_date(struct kovaplus_device * kovaplus,u8 const * data)536 static void kovaplus_keep_values_up_to_date(struct kovaplus_device *kovaplus,
537 		u8 const *data)
538 {
539 	struct kovaplus_mouse_report_button const *button_report;
540 
541 	if (data[0] != KOVAPLUS_MOUSE_REPORT_NUMBER_BUTTON)
542 		return;
543 
544 	button_report = (struct kovaplus_mouse_report_button const *)data;
545 
546 	switch (button_report->type) {
547 	case KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_PROFILE_1:
548 		kovaplus_profile_activated(kovaplus, button_report->data1 - 1);
549 		break;
550 	case KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_CPI:
551 		kovaplus->actual_cpi = kovaplus_convert_event_cpi(button_report->data1);
552 		break;
553 	case KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_SENSITIVITY:
554 		kovaplus->actual_x_sensitivity = button_report->data1;
555 		kovaplus->actual_y_sensitivity = button_report->data2;
556 		break;
557 	default:
558 		break;
559 	}
560 }
561 
kovaplus_report_to_chrdev(struct kovaplus_device const * kovaplus,u8 const * data)562 static void kovaplus_report_to_chrdev(struct kovaplus_device const *kovaplus,
563 		u8 const *data)
564 {
565 	struct kovaplus_roccat_report roccat_report;
566 	struct kovaplus_mouse_report_button const *button_report;
567 
568 	if (data[0] != KOVAPLUS_MOUSE_REPORT_NUMBER_BUTTON)
569 		return;
570 
571 	button_report = (struct kovaplus_mouse_report_button const *)data;
572 
573 	if (button_report->type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_PROFILE_2)
574 		return;
575 
576 	roccat_report.type = button_report->type;
577 	roccat_report.profile = kovaplus->actual_profile + 1;
578 
579 	if (roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_MACRO ||
580 			roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_SHORTCUT ||
581 			roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_QUICKLAUNCH ||
582 			roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_TIMER)
583 		roccat_report.button = button_report->data1;
584 	else
585 		roccat_report.button = 0;
586 
587 	if (roccat_report.type == KOVAPLUS_MOUSE_REPORT_BUTTON_TYPE_CPI)
588 		roccat_report.data1 = kovaplus_convert_event_cpi(button_report->data1);
589 	else
590 		roccat_report.data1 = button_report->data1;
591 
592 	roccat_report.data2 = button_report->data2;
593 
594 	roccat_report_event(kovaplus->chrdev_minor,
595 			(uint8_t const *)&roccat_report);
596 }
597 
kovaplus_raw_event(struct hid_device * hdev,struct hid_report * report,u8 * data,int size)598 static int kovaplus_raw_event(struct hid_device *hdev,
599 		struct hid_report *report, u8 *data, int size)
600 {
601 	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
602 	struct kovaplus_device *kovaplus = hid_get_drvdata(hdev);
603 
604 	if (intf->cur_altsetting->desc.bInterfaceProtocol
605 			!= USB_INTERFACE_PROTOCOL_MOUSE)
606 		return 0;
607 
608 	if (kovaplus == NULL)
609 		return 0;
610 
611 	kovaplus_keep_values_up_to_date(kovaplus, data);
612 
613 	if (kovaplus->roccat_claimed)
614 		kovaplus_report_to_chrdev(kovaplus, data);
615 
616 	return 0;
617 }
618 
619 static const struct hid_device_id kovaplus_devices[] = {
620 	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KOVAPLUS) },
621 	{ }
622 };
623 
624 MODULE_DEVICE_TABLE(hid, kovaplus_devices);
625 
626 static struct hid_driver kovaplus_driver = {
627 		.name = "kovaplus",
628 		.id_table = kovaplus_devices,
629 		.probe = kovaplus_probe,
630 		.remove = kovaplus_remove,
631 		.raw_event = kovaplus_raw_event
632 };
633 
kovaplus_init(void)634 static int __init kovaplus_init(void)
635 {
636 	int retval;
637 
638 	kovaplus_class = class_create(THIS_MODULE, "kovaplus");
639 	if (IS_ERR(kovaplus_class))
640 		return PTR_ERR(kovaplus_class);
641 	kovaplus_class->dev_groups = kovaplus_groups;
642 
643 	retval = hid_register_driver(&kovaplus_driver);
644 	if (retval)
645 		class_destroy(kovaplus_class);
646 	return retval;
647 }
648 
kovaplus_exit(void)649 static void __exit kovaplus_exit(void)
650 {
651 	hid_unregister_driver(&kovaplus_driver);
652 	class_destroy(kovaplus_class);
653 }
654 
655 module_init(kovaplus_init);
656 module_exit(kovaplus_exit);
657 
658 MODULE_AUTHOR("Stefan Achatz");
659 MODULE_DESCRIPTION("USB Roccat Kova[+] driver");
660 MODULE_LICENSE("GPL v2");
661