drivers/hid/hid-roccat-pyra.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Roccat Pyra driver for Linux
   4  *
   5  * Copyright (c) 2010 Stefan Achatz <erazor_de@users.sourceforge.net>
   6  */
   7
   8 /*
   9  */
  10
  11 /*
  12  * Roccat Pyra is a mobile gamer mouse which comes in wired and wireless
  13  * variant. Wireless variant is not tested.
  14  * Userland tools can be found at http://sourceforge.net/projects/roccat
  15  */
  16
  17 #include <linux/device.h>
  18 #include <linux/input.h>
  19 #include <linux/hid.h>
  20 #include <linux/module.h>
  21 #include <linux/slab.h>
  22 #include <linux/hid-roccat.h>
  23 #include "hid-ids.h"
  24 #include "hid-roccat-common.h"
  25 #include "hid-roccat-pyra.h"
  26
  27 static uint profile_numbers[5] = {0, 1, 2, 3, 4};
  28
  29 /* pyra_class is used for creating sysfs attributes via roccat char device */
  30 static struct class *pyra_class;
  31
  32 static void profile_activated(struct pyra_device *pyra,
  33                 unsigned int new_profile)
  34 {
  35         if (new_profile >= ARRAY_SIZE(pyra->profile_settings))
  36                 return;
  37         pyra->actual_profile = new_profile;
  38         pyra->actual_cpi = pyra->profile_settings[pyra->actual_profile].y_cpi;
  39 }
  40
  41 static int pyra_send_control(struct usb_device *usb_dev, int value,
  42                 enum pyra_control_requests request)
  43 {
  44         struct roccat_common2_control control;
  45
  46         if ((request == PYRA_CONTROL_REQUEST_PROFILE_SETTINGS ||
  47                         request == PYRA_CONTROL_REQUEST_PROFILE_BUTTONS) &&
  48                         (value < 0 || value > 4))
  49                 return -EINVAL;
  50
  51         control.command = ROCCAT_COMMON_COMMAND_CONTROL;
  52         control.value = value;
  53         control.request = request;
  54
  55         return roccat_common2_send(usb_dev, ROCCAT_COMMON_COMMAND_CONTROL,
  56                         &control, sizeof(struct roccat_common2_control));
  57 }
  58
  59 static int pyra_get_profile_settings(struct usb_device *usb_dev,
  60                 struct pyra_profile_settings *buf, int number)
  61 {
  62         int retval;
  63         retval = pyra_send_control(usb_dev, number,
  64                         PYRA_CONTROL_REQUEST_PROFILE_SETTINGS);
  65         if (retval)
  66                 return retval;
  67         return roccat_common2_receive(usb_dev, PYRA_COMMAND_PROFILE_SETTINGS,
  68                         buf, PYRA_SIZE_PROFILE_SETTINGS);
  69 }
  70
  71 static int pyra_get_settings(struct usb_device *usb_dev,
  72                 struct pyra_settings *buf)
  73 {
  74         return roccat_common2_receive(usb_dev, PYRA_COMMAND_SETTINGS,
  75                         buf, PYRA_SIZE_SETTINGS);
  76 }
  77
  78 static int pyra_set_settings(struct usb_device *usb_dev,
  79                 struct pyra_settings const *settings)
  80 {
  81         return roccat_common2_send_with_status(usb_dev,
  82                         PYRA_COMMAND_SETTINGS, settings,
  83                         PYRA_SIZE_SETTINGS);
  84 }
  85
  86 static ssize_t pyra_sysfs_read(struct file *fp, struct kobject *kobj,
  87                 char *buf, loff_t off, size_t count,
  88                 size_t real_size, uint command)
  89 {
  90         struct device *dev = kobj_to_dev(kobj)->parent->parent;
  91         struct pyra_device *pyra = hid_get_drvdata(dev_get_drvdata(dev));
  92         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
  93         int retval;
  94
  95         if (off >= real_size)
  96                 return 0;
  97
  98         if (off != 0 || count != real_size)
  99                 return -EINVAL;
 100
 101         mutex_lock(&pyra->pyra_lock);
 102         retval = roccat_common2_receive(usb_dev, command, buf, real_size);
 103         mutex_unlock(&pyra->pyra_lock);
 104
 105         if (retval)
 106                 return retval;
 107
 108         return real_size;
 109 }
 110
 111 static ssize_t pyra_sysfs_write(struct file *fp, struct kobject *kobj,
 112                 void const *buf, loff_t off, size_t count,
 113                 size_t real_size, uint command)
 114 {
 115         struct device *dev = kobj_to_dev(kobj)->parent->parent;
 116         struct pyra_device *pyra = hid_get_drvdata(dev_get_drvdata(dev));
 117         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 118         int retval;
 119
 120         if (off != 0 || count != real_size)
 121                 return -EINVAL;
 122
 123         mutex_lock(&pyra->pyra_lock);
 124         retval = roccat_common2_send_with_status(usb_dev, command, (void *)buf, real_size);
 125         mutex_unlock(&pyra->pyra_lock);
 126
 127         if (retval)
 128                 return retval;
 129
 130         return real_size;
 131 }
 132
 133 #define PYRA_SYSFS_W(thingy, THINGY) \
 134 static ssize_t pyra_sysfs_write_ ## thingy(struct file *fp, \
 135                 struct kobject *kobj, struct bin_attribute *attr, char *buf, \
 136                 loff_t off, size_t count) \
 137 { \
 138         return pyra_sysfs_write(fp, kobj, buf, off, count, \
 139                         PYRA_SIZE_ ## THINGY, PYRA_COMMAND_ ## THINGY); \
 140 }
 141
 142 #define PYRA_SYSFS_R(thingy, THINGY) \
 143 static ssize_t pyra_sysfs_read_ ## thingy(struct file *fp, \
 144                 struct kobject *kobj, struct bin_attribute *attr, char *buf, \
 145                 loff_t off, size_t count) \
 146 { \
 147         return pyra_sysfs_read(fp, kobj, buf, off, count, \
 148                         PYRA_SIZE_ ## THINGY, PYRA_COMMAND_ ## THINGY); \
 149 }
 150
 151 #define PYRA_SYSFS_RW(thingy, THINGY) \
 152 PYRA_SYSFS_W(thingy, THINGY) \
 153 PYRA_SYSFS_R(thingy, THINGY)
 154
 155 #define PYRA_BIN_ATTRIBUTE_RW(thingy, THINGY) \
 156 PYRA_SYSFS_RW(thingy, THINGY); \
 157 static struct bin_attribute bin_attr_##thingy = { \
 158         .attr = { .name = #thingy, .mode = 0660 }, \
 159         .size = PYRA_SIZE_ ## THINGY, \
 160         .read = pyra_sysfs_read_ ## thingy, \
 161         .write = pyra_sysfs_write_ ## thingy \
 162 }
 163
 164 #define PYRA_BIN_ATTRIBUTE_R(thingy, THINGY) \
 165 PYRA_SYSFS_R(thingy, THINGY); \
 166 static struct bin_attribute bin_attr_##thingy = { \
 167         .attr = { .name = #thingy, .mode = 0440 }, \
 168         .size = PYRA_SIZE_ ## THINGY, \
 169         .read = pyra_sysfs_read_ ## thingy, \
 170 }
 171
 172 #define PYRA_BIN_ATTRIBUTE_W(thingy, THINGY) \
 173 PYRA_SYSFS_W(thingy, THINGY); \
 174 static struct bin_attribute bin_attr_##thingy = { \
 175         .attr = { .name = #thingy, .mode = 0220 }, \
 176         .size = PYRA_SIZE_ ## THINGY, \
 177         .write = pyra_sysfs_write_ ## thingy \
 178 }
 179
 180 PYRA_BIN_ATTRIBUTE_W(control, CONTROL);
 181 PYRA_BIN_ATTRIBUTE_RW(info, INFO);
 182 PYRA_BIN_ATTRIBUTE_RW(profile_settings, PROFILE_SETTINGS);
 183 PYRA_BIN_ATTRIBUTE_RW(profile_buttons, PROFILE_BUTTONS);
 184
 185 static ssize_t pyra_sysfs_read_profilex_settings(struct file *fp,
 186                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
 187                 loff_t off, size_t count)
 188 {
 189         struct device *dev = kobj_to_dev(kobj)->parent->parent;
 190         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 191         ssize_t retval;
 192
 193         retval = pyra_send_control(usb_dev, *(uint *)(attr->private),
 194                         PYRA_CONTROL_REQUEST_PROFILE_SETTINGS);
 195         if (retval)
 196                 return retval;
 197
 198         return pyra_sysfs_read(fp, kobj, buf, off, count,
 199                         PYRA_SIZE_PROFILE_SETTINGS,
 200                         PYRA_COMMAND_PROFILE_SETTINGS);
 201 }
 202
 203 static ssize_t pyra_sysfs_read_profilex_buttons(struct file *fp,
 204                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
 205                 loff_t off, size_t count)
 206 {
 207         struct device *dev = kobj_to_dev(kobj)->parent->parent;
 208         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 209         ssize_t retval;
 210
 211         retval = pyra_send_control(usb_dev, *(uint *)(attr->private),
 212                         PYRA_CONTROL_REQUEST_PROFILE_BUTTONS);
 213         if (retval)
 214                 return retval;
 215
 216         return pyra_sysfs_read(fp, kobj, buf, off, count,
 217                         PYRA_SIZE_PROFILE_BUTTONS,
 218                         PYRA_COMMAND_PROFILE_BUTTONS);
 219 }
 220
 221 #define PROFILE_ATTR(number)                                            \
 222 static struct bin_attribute bin_attr_profile##number##_settings = {     \
 223         .attr = { .name = "profile" #number "_settings", .mode = 0440 },        \
 224         .size = PYRA_SIZE_PROFILE_SETTINGS,                             \
 225         .read = pyra_sysfs_read_profilex_settings,                      \
 226         .private = &profile_numbers[number-1],                          \
 227 };                                                                      \
 228 static struct bin_attribute bin_attr_profile##number##_buttons = {      \
 229         .attr = { .name = "profile" #number "_buttons", .mode = 0440 }, \
 230         .size = PYRA_SIZE_PROFILE_BUTTONS,                              \
 231         .read = pyra_sysfs_read_profilex_buttons,                       \
 232         .private = &profile_numbers[number-1],                          \
 233 };
 234 PROFILE_ATTR(1);
 235 PROFILE_ATTR(2);
 236 PROFILE_ATTR(3);
 237 PROFILE_ATTR(4);
 238 PROFILE_ATTR(5);
 239
 240 static ssize_t pyra_sysfs_write_settings(struct file *fp,
 241                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
 242                 loff_t off, size_t count)
 243 {
 244         struct device *dev = kobj_to_dev(kobj)->parent->parent;
 245         struct pyra_device *pyra = hid_get_drvdata(dev_get_drvdata(dev));
 246         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 247         int retval = 0;
 248         struct pyra_roccat_report roccat_report;
 249         struct pyra_settings const *settings;
 250
 251         if (off != 0 || count != PYRA_SIZE_SETTINGS)
 252                 return -EINVAL;
 253
 254         settings = (struct pyra_settings const *)buf;
 255         if (settings->startup_profile >= ARRAY_SIZE(pyra->profile_settings))
 256                 return -EINVAL;
 257
 258         mutex_lock(&pyra->pyra_lock);
 259
 260         retval = pyra_set_settings(usb_dev, settings);
 261         if (retval) {
 262                 mutex_unlock(&pyra->pyra_lock);
 263                 return retval;
 264         }
 265
 266         profile_activated(pyra, settings->startup_profile);
 267
 268         roccat_report.type = PYRA_MOUSE_EVENT_BUTTON_TYPE_PROFILE_2;
 269         roccat_report.value = settings->startup_profile + 1;
 270         roccat_report.key = 0;
 271         roccat_report_event(pyra->chrdev_minor,
 272                         (uint8_t const *)&roccat_report);
 273
 274         mutex_unlock(&pyra->pyra_lock);
 275         return PYRA_SIZE_SETTINGS;
 276 }
 277
 278 PYRA_SYSFS_R(settings, SETTINGS);
 279 static struct bin_attribute bin_attr_settings =
 280         __BIN_ATTR(settings, (S_IWUSR | S_IRUGO),
 281                    pyra_sysfs_read_settings, pyra_sysfs_write_settings,
 282                    PYRA_SIZE_SETTINGS);
 283
 284 static ssize_t pyra_sysfs_show_actual_cpi(struct device *dev,
 285                 struct device_attribute *attr, char *buf)
 286 {
 287         struct pyra_device *pyra =
 288                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 289         return snprintf(buf, PAGE_SIZE, "%d\n", pyra->actual_cpi);
 290 }
 291 static DEVICE_ATTR(actual_cpi, 0440, pyra_sysfs_show_actual_cpi, NULL);
 292
 293 static ssize_t pyra_sysfs_show_actual_profile(struct device *dev,
 294                 struct device_attribute *attr, char *buf)
 295 {
 296         struct pyra_device *pyra =
 297                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 298         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 299         struct pyra_settings settings;
 300
 301         mutex_lock(&pyra->pyra_lock);
 302         roccat_common2_receive(usb_dev, PYRA_COMMAND_SETTINGS,
 303                         &settings, PYRA_SIZE_SETTINGS);
 304         mutex_unlock(&pyra->pyra_lock);
 305
 306         return snprintf(buf, PAGE_SIZE, "%d\n", settings.startup_profile);
 307 }
 308 static DEVICE_ATTR(actual_profile, 0440, pyra_sysfs_show_actual_profile, NULL);
 309 static DEVICE_ATTR(startup_profile, 0440, pyra_sysfs_show_actual_profile, NULL);
 310
 311 static ssize_t pyra_sysfs_show_firmware_version(struct device *dev,
 312                 struct device_attribute *attr, char *buf)
 313 {
 314         struct pyra_device *pyra;
 315         struct usb_device *usb_dev;
 316         struct pyra_info info;
 317
 318         dev = dev->parent->parent;
 319         pyra = hid_get_drvdata(dev_get_drvdata(dev));
 320         usb_dev = interface_to_usbdev(to_usb_interface(dev));
 321
 322         mutex_lock(&pyra->pyra_lock);
 323         roccat_common2_receive(usb_dev, PYRA_COMMAND_INFO,
 324                         &info, PYRA_SIZE_INFO);
 325         mutex_unlock(&pyra->pyra_lock);
 326
 327         return snprintf(buf, PAGE_SIZE, "%d\n", info.firmware_version);
 328 }
 329 static DEVICE_ATTR(firmware_version, 0440, pyra_sysfs_show_firmware_version,
 330                    NULL);
 331
 332 static struct attribute *pyra_attrs[] = {
 333         &dev_attr_actual_cpi.attr,
 334         &dev_attr_actual_profile.attr,
 335         &dev_attr_firmware_version.attr,
 336         &dev_attr_startup_profile.attr,
 337         NULL,
 338 };
 339
 340 static struct bin_attribute *pyra_bin_attributes[] = {
 341         &bin_attr_control,
 342         &bin_attr_info,
 343         &bin_attr_profile_settings,
 344         &bin_attr_profile_buttons,
 345         &bin_attr_settings,
 346         &bin_attr_profile1_settings,
 347         &bin_attr_profile2_settings,
 348         &bin_attr_profile3_settings,
 349         &bin_attr_profile4_settings,
 350         &bin_attr_profile5_settings,
 351         &bin_attr_profile1_buttons,
 352         &bin_attr_profile2_buttons,
 353         &bin_attr_profile3_buttons,
 354         &bin_attr_profile4_buttons,
 355         &bin_attr_profile5_buttons,
 356         NULL,
 357 };
 358
 359 static const struct attribute_group pyra_group = {
 360         .attrs = pyra_attrs,
 361         .bin_attrs = pyra_bin_attributes,
 362 };
 363
 364 static const struct attribute_group *pyra_groups[] = {
 365         &pyra_group,
 366         NULL,
 367 };
 368
 369 static int pyra_init_pyra_device_struct(struct usb_device *usb_dev,
 370                 struct pyra_device *pyra)
 371 {
 372         struct pyra_settings settings;
 373         int retval, i;
 374
 375         mutex_init(&pyra->pyra_lock);
 376
 377         retval = pyra_get_settings(usb_dev, &settings);
 378         if (retval)
 379                 return retval;
 380
 381         for (i = 0; i < 5; ++i) {
 382                 retval = pyra_get_profile_settings(usb_dev,
 383                                 &pyra->profile_settings[i], i);
 384                 if (retval)
 385                         return retval;
 386         }
 387
 388         profile_activated(pyra, settings.startup_profile);
 389
 390         return 0;
 391 }
 392
 393 static int pyra_init_specials(struct hid_device *hdev)
 394 {
 395         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 396         struct usb_device *usb_dev = interface_to_usbdev(intf);
 397         struct pyra_device *pyra;
 398         int retval;
 399
 400         if (intf->cur_altsetting->desc.bInterfaceProtocol
 401                         == USB_INTERFACE_PROTOCOL_MOUSE) {
 402
 403                 pyra = kzalloc(sizeof(*pyra), GFP_KERNEL);
 404                 if (!pyra) {
 405                         hid_err(hdev, "can't alloc device descriptor\n");
 406                         return -ENOMEM;
 407                 }
 408                 hid_set_drvdata(hdev, pyra);
 409
 410                 retval = pyra_init_pyra_device_struct(usb_dev, pyra);
 411                 if (retval) {
 412                         hid_err(hdev, "couldn't init struct pyra_device\n");
 413                         goto exit_free;
 414                 }
 415
 416                 retval = roccat_connect(pyra_class, hdev,
 417                                 sizeof(struct pyra_roccat_report));
 418                 if (retval < 0) {
 419                         hid_err(hdev, "couldn't init char dev\n");
 420                 } else {
 421                         pyra->chrdev_minor = retval;
 422                         pyra->roccat_claimed = 1;
 423                 }
 424         } else {
 425                 hid_set_drvdata(hdev, NULL);
 426         }
 427
 428         return 0;
 429 exit_free:
 430         kfree(pyra);
 431         return retval;
 432 }
 433
 434 static void pyra_remove_specials(struct hid_device *hdev)
 435 {
 436         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 437         struct pyra_device *pyra;
 438
 439         if (intf->cur_altsetting->desc.bInterfaceProtocol
 440                         == USB_INTERFACE_PROTOCOL_MOUSE) {
 441                 pyra = hid_get_drvdata(hdev);
 442                 if (pyra->roccat_claimed)
 443                         roccat_disconnect(pyra->chrdev_minor);
 444                 kfree(hid_get_drvdata(hdev));
 445         }
 446 }
 447
 448 static int pyra_probe(struct hid_device *hdev, const struct hid_device_id *id)
 449 {
 450         int retval;
 451
 452         retval = hid_parse(hdev);
 453         if (retval) {
 454                 hid_err(hdev, "parse failed\n");
 455                 goto exit;
 456         }
 457
 458         retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 459         if (retval) {
 460                 hid_err(hdev, "hw start failed\n");
 461                 goto exit;
 462         }
 463
 464         retval = pyra_init_specials(hdev);
 465         if (retval) {
 466                 hid_err(hdev, "couldn't install mouse\n");
 467                 goto exit_stop;
 468         }
 469         return 0;
 470
 471 exit_stop:
 472         hid_hw_stop(hdev);
 473 exit:
 474         return retval;
 475 }
 476
 477 static void pyra_remove(struct hid_device *hdev)
 478 {
 479         pyra_remove_specials(hdev);
 480         hid_hw_stop(hdev);
 481 }
 482
 483 static void pyra_keep_values_up_to_date(struct pyra_device *pyra,
 484                 u8 const *data)
 485 {
 486         struct pyra_mouse_event_button const *button_event;
 487
 488         switch (data[0]) {
 489         case PYRA_MOUSE_REPORT_NUMBER_BUTTON:
 490                 button_event = (struct pyra_mouse_event_button const *)data;
 491                 switch (button_event->type) {
 492                 case PYRA_MOUSE_EVENT_BUTTON_TYPE_PROFILE_2:
 493                         profile_activated(pyra, button_event->data1 - 1);
 494                         break;
 495                 case PYRA_MOUSE_EVENT_BUTTON_TYPE_CPI:
 496                         pyra->actual_cpi = button_event->data1;
 497                         break;
 498                 }
 499                 break;
 500         }
 501 }
 502
 503 static void pyra_report_to_chrdev(struct pyra_device const *pyra,
 504                 u8 const *data)
 505 {
 506         struct pyra_roccat_report roccat_report;
 507         struct pyra_mouse_event_button const *button_event;
 508
 509         if (data[0] != PYRA_MOUSE_REPORT_NUMBER_BUTTON)
 510                 return;
 511
 512         button_event = (struct pyra_mouse_event_button const *)data;
 513
 514         switch (button_event->type) {
 515         case PYRA_MOUSE_EVENT_BUTTON_TYPE_PROFILE_2:
 516         case PYRA_MOUSE_EVENT_BUTTON_TYPE_CPI:
 517                 roccat_report.type = button_event->type;
 518                 roccat_report.value = button_event->data1;
 519                 roccat_report.key = 0;
 520                 roccat_report_event(pyra->chrdev_minor,
 521                                 (uint8_t const *)&roccat_report);
 522                 break;
 523         case PYRA_MOUSE_EVENT_BUTTON_TYPE_MACRO:
 524         case PYRA_MOUSE_EVENT_BUTTON_TYPE_SHORTCUT:
 525         case PYRA_MOUSE_EVENT_BUTTON_TYPE_QUICKLAUNCH:
 526                 if (button_event->data2 == PYRA_MOUSE_EVENT_BUTTON_PRESS) {
 527                         roccat_report.type = button_event->type;
 528                         roccat_report.key = button_event->data1;
 529                         /*
 530                          * pyra reports profile numbers with range 1-5.
 531                          * Keeping this behaviour.
 532                          */
 533                         roccat_report.value = pyra->actual_profile + 1;
 534                         roccat_report_event(pyra->chrdev_minor,
 535                                         (uint8_t const *)&roccat_report);
 536                 }
 537                 break;
 538         }
 539 }
 540
 541 static int pyra_raw_event(struct hid_device *hdev, struct hid_report *report,
 542                 u8 *data, int size)
 543 {
 544         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 545         struct pyra_device *pyra = hid_get_drvdata(hdev);
 546
 547         if (intf->cur_altsetting->desc.bInterfaceProtocol
 548                         != USB_INTERFACE_PROTOCOL_MOUSE)
 549                 return 0;
 550
 551         if (pyra == NULL)
 552                 return 0;
 553
 554         pyra_keep_values_up_to_date(pyra, data);
 555
 556         if (pyra->roccat_claimed)
 557                 pyra_report_to_chrdev(pyra, data);
 558
 559         return 0;
 560 }
 561
 562 static const struct hid_device_id pyra_devices[] = {
 563         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT,
 564                         USB_DEVICE_ID_ROCCAT_PYRA_WIRED) },
 565         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT,
 566                         USB_DEVICE_ID_ROCCAT_PYRA_WIRELESS) },
 567         { }
 568 };
 569
 570 MODULE_DEVICE_TABLE(hid, pyra_devices);
 571
 572 static struct hid_driver pyra_driver = {
 573                 .name = "pyra",
 574                 .id_table = pyra_devices,
 575                 .probe = pyra_probe,
 576                 .remove = pyra_remove,
 577                 .raw_event = pyra_raw_event
 578 };
 579
 580 static int __init pyra_init(void)
 581 {
 582         int retval;
 583
 584         /* class name has to be same as driver name */
 585         pyra_class = class_create(THIS_MODULE, "pyra");
 586         if (IS_ERR(pyra_class))
 587                 return PTR_ERR(pyra_class);
 588         pyra_class->dev_groups = pyra_groups;
 589
 590         retval = hid_register_driver(&pyra_driver);
 591         if (retval)
 592                 class_destroy(pyra_class);
 593         return retval;
 594 }
 595
 596 static void __exit pyra_exit(void)
 597 {
 598         hid_unregister_driver(&pyra_driver);
 599         class_destroy(pyra_class);
 600 }
 601
 602 module_init(pyra_init);
 603 module_exit(pyra_exit);
 604
 605 MODULE_AUTHOR("Stefan Achatz");
 606 MODULE_DESCRIPTION("USB Roccat Pyra driver");
 607 MODULE_LICENSE("GPL v2");