drivers/hid/hid-roccat-pyra.c

   1 /*
   2  * Roccat Pyra driver for Linux
   3  *
   4  * Copyright (c) 2010 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 Pyra is a mobile gamer mouse which comes in wired and wireless
  16  * variant. Wireless variant is not tested.
  17  * Userland tools can be found at http://sourceforge.net/projects/roccat
  18  */
  19
  20 #include <linux/device.h>
  21 #include <linux/input.h>
  22 #include <linux/hid.h>
  23 #include <linux/module.h>
  24 #include <linux/slab.h>
  25 #include <linux/hid-roccat.h>
  26 #include "hid-ids.h"
  27 #include "hid-roccat-common.h"
  28 #include "hid-roccat-pyra.h"
  29
  30 static uint profile_numbers[5] = {0, 1, 2, 3, 4};
  31
  32 /* pyra_class is used for creating sysfs attributes via roccat char device */
  33 static struct class *pyra_class;
  34
  35 static void profile_activated(struct pyra_device *pyra,
  36                 unsigned int new_profile)
  37 {
  38         pyra->actual_profile = new_profile;
  39         pyra->actual_cpi = pyra->profile_settings[pyra->actual_profile].y_cpi;
  40 }
  41
  42 static int pyra_send_control(struct usb_device *usb_dev, int value,
  43                 enum pyra_control_requests request)
  44 {
  45         struct roccat_common2_control control;
  46
  47         if ((request == PYRA_CONTROL_REQUEST_PROFILE_SETTINGS ||
  48                         request == PYRA_CONTROL_REQUEST_PROFILE_BUTTONS) &&
  49                         (value < 0 || value > 4))
  50                 return -EINVAL;
  51
  52         control.command = ROCCAT_COMMON_COMMAND_CONTROL;
  53         control.value = value;
  54         control.request = request;
  55
  56         return roccat_common2_send(usb_dev, ROCCAT_COMMON_COMMAND_CONTROL,
  57                         &control, sizeof(struct roccat_common2_control));
  58 }
  59
  60 static int pyra_get_profile_settings(struct usb_device *usb_dev,
  61                 struct pyra_profile_settings *buf, int number)
  62 {
  63         int retval;
  64         retval = pyra_send_control(usb_dev, number,
  65                         PYRA_CONTROL_REQUEST_PROFILE_SETTINGS);
  66         if (retval)
  67                 return retval;
  68         return roccat_common2_receive(usb_dev, PYRA_COMMAND_PROFILE_SETTINGS,
  69                         buf, PYRA_SIZE_PROFILE_SETTINGS);
  70 }
  71
  72 static int pyra_get_settings(struct usb_device *usb_dev,
  73                 struct pyra_settings *buf)
  74 {
  75         return roccat_common2_receive(usb_dev, PYRA_COMMAND_SETTINGS,
  76                         buf, PYRA_SIZE_SETTINGS);
  77 }
  78
  79 static int pyra_set_settings(struct usb_device *usb_dev,
  80                 struct pyra_settings const *settings)
  81 {
  82         return roccat_common2_send_with_status(usb_dev,
  83                         PYRA_COMMAND_SETTINGS, settings,
  84                         PYRA_SIZE_SETTINGS);
  85 }
  86
  87 static ssize_t pyra_sysfs_read(struct file *fp, struct kobject *kobj,
  88                 char *buf, loff_t off, size_t count,
  89                 size_t real_size, uint command)
  90 {
  91         struct device *dev =
  92                         container_of(kobj, struct device, kobj)->parent->parent;
  93         struct pyra_device *pyra = hid_get_drvdata(dev_get_drvdata(dev));
  94         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
  95         int retval;
  96
  97         if (off >= real_size)
  98                 return 0;
  99
 100         if (off != 0 || count != real_size)
 101                 return -EINVAL;
 102
 103         mutex_lock(&pyra->pyra_lock);
 104         retval = roccat_common2_receive(usb_dev, command, buf, real_size);
 105         mutex_unlock(&pyra->pyra_lock);
 106
 107         if (retval)
 108                 return retval;
 109
 110         return real_size;
 111 }
 112
 113 static ssize_t pyra_sysfs_write(struct file *fp, struct kobject *kobj,
 114                 void const *buf, loff_t off, size_t count,
 115                 size_t real_size, uint command)
 116 {
 117         struct device *dev =
 118                         container_of(kobj, struct device, kobj)->parent->parent;
 119         struct pyra_device *pyra = hid_get_drvdata(dev_get_drvdata(dev));
 120         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 121         int retval;
 122
 123         if (off != 0 || count != real_size)
 124                 return -EINVAL;
 125
 126         mutex_lock(&pyra->pyra_lock);
 127         retval = roccat_common2_send_with_status(usb_dev, command, (void *)buf, real_size);
 128         mutex_unlock(&pyra->pyra_lock);
 129
 130         if (retval)
 131                 return retval;
 132
 133         return real_size;
 134 }
 135
 136 #define PYRA_SYSFS_W(thingy, THINGY) \
 137 static ssize_t pyra_sysfs_write_ ## thingy(struct file *fp, \
 138                 struct kobject *kobj, struct bin_attribute *attr, char *buf, \
 139                 loff_t off, size_t count) \
 140 { \
 141         return pyra_sysfs_write(fp, kobj, buf, off, count, \
 142                         PYRA_SIZE_ ## THINGY, PYRA_COMMAND_ ## THINGY); \
 143 }
 144
 145 #define PYRA_SYSFS_R(thingy, THINGY) \
 146 static ssize_t pyra_sysfs_read_ ## thingy(struct file *fp, \
 147                 struct kobject *kobj, struct bin_attribute *attr, char *buf, \
 148                 loff_t off, size_t count) \
 149 { \
 150         return pyra_sysfs_read(fp, kobj, buf, off, count, \
 151                         PYRA_SIZE_ ## THINGY, PYRA_COMMAND_ ## THINGY); \
 152 }
 153
 154 #define PYRA_SYSFS_RW(thingy, THINGY) \
 155 PYRA_SYSFS_W(thingy, THINGY) \
 156 PYRA_SYSFS_R(thingy, THINGY)
 157
 158 #define PYRA_BIN_ATTRIBUTE_RW(thingy, THINGY) \
 159 PYRA_SYSFS_RW(thingy, THINGY); \
 160 static struct bin_attribute bin_attr_##thingy = { \
 161         .attr = { .name = #thingy, .mode = 0660 }, \
 162         .size = PYRA_SIZE_ ## THINGY, \
 163         .read = pyra_sysfs_read_ ## thingy, \
 164         .write = pyra_sysfs_write_ ## thingy \
 165 }
 166
 167 #define PYRA_BIN_ATTRIBUTE_R(thingy, THINGY) \
 168 PYRA_SYSFS_R(thingy, THINGY); \
 169 static struct bin_attribute bin_attr_##thingy = { \
 170         .attr = { .name = #thingy, .mode = 0440 }, \
 171         .size = PYRA_SIZE_ ## THINGY, \
 172         .read = pyra_sysfs_read_ ## thingy, \
 173 }
 174
 175 #define PYRA_BIN_ATTRIBUTE_W(thingy, THINGY) \
 176 PYRA_SYSFS_W(thingy, THINGY); \
 177 static struct bin_attribute bin_attr_##thingy = { \
 178         .attr = { .name = #thingy, .mode = 0220 }, \
 179         .size = PYRA_SIZE_ ## THINGY, \
 180         .write = pyra_sysfs_write_ ## thingy \
 181 }
 182
 183 PYRA_BIN_ATTRIBUTE_W(control, CONTROL);
 184 PYRA_BIN_ATTRIBUTE_RW(info, INFO);
 185 PYRA_BIN_ATTRIBUTE_RW(profile_settings, PROFILE_SETTINGS);
 186 PYRA_BIN_ATTRIBUTE_RW(profile_buttons, PROFILE_BUTTONS);
 187
 188 static ssize_t pyra_sysfs_read_profilex_settings(struct file *fp,
 189                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
 190                 loff_t off, size_t count)
 191 {
 192         struct device *dev =
 193                         container_of(kobj, struct device, kobj)->parent->parent;
 194         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 195         ssize_t retval;
 196
 197         retval = pyra_send_control(usb_dev, *(uint *)(attr->private),
 198                         PYRA_CONTROL_REQUEST_PROFILE_SETTINGS);
 199         if (retval)
 200                 return retval;
 201
 202         return pyra_sysfs_read(fp, kobj, buf, off, count,
 203                         PYRA_SIZE_PROFILE_SETTINGS,
 204                         PYRA_COMMAND_PROFILE_SETTINGS);
 205 }
 206
 207 static ssize_t pyra_sysfs_read_profilex_buttons(struct file *fp,
 208                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
 209                 loff_t off, size_t count)
 210 {
 211         struct device *dev =
 212                         container_of(kobj, struct device, kobj)->parent->parent;
 213         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 214         ssize_t retval;
 215
 216         retval = pyra_send_control(usb_dev, *(uint *)(attr->private),
 217                         PYRA_CONTROL_REQUEST_PROFILE_BUTTONS);
 218         if (retval)
 219                 return retval;
 220
 221         return pyra_sysfs_read(fp, kobj, buf, off, count,
 222                         PYRA_SIZE_PROFILE_BUTTONS,
 223                         PYRA_COMMAND_PROFILE_BUTTONS);
 224 }
 225
 226 #define PROFILE_ATTR(number)                                            \
 227 static struct bin_attribute bin_attr_profile##number##_settings = {     \
 228         .attr = { .name = "profile" #number "_settings", .mode = 0440 },        \
 229         .size = PYRA_SIZE_PROFILE_SETTINGS,                             \
 230         .read = pyra_sysfs_read_profilex_settings,                      \
 231         .private = &profile_numbers[number-1],                          \
 232 };                                                                      \
 233 static struct bin_attribute bin_attr_profile##number##_buttons = {      \
 234         .attr = { .name = "profile" #number "_buttons", .mode = 0440 }, \
 235         .size = PYRA_SIZE_PROFILE_BUTTONS,                              \
 236         .read = pyra_sysfs_read_profilex_buttons,                       \
 237         .private = &profile_numbers[number-1],                          \
 238 };
 239 PROFILE_ATTR(1);
 240 PROFILE_ATTR(2);
 241 PROFILE_ATTR(3);
 242 PROFILE_ATTR(4);
 243 PROFILE_ATTR(5);
 244
 245 static ssize_t pyra_sysfs_write_settings(struct file *fp,
 246                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
 247                 loff_t off, size_t count)
 248 {
 249         struct device *dev =
 250                         container_of(kobj, struct device, kobj)->parent->parent;
 251         struct pyra_device *pyra = hid_get_drvdata(dev_get_drvdata(dev));
 252         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 253         int retval = 0;
 254         struct pyra_roccat_report roccat_report;
 255         struct pyra_settings const *settings;
 256
 257         if (off != 0 || count != PYRA_SIZE_SETTINGS)
 258                 return -EINVAL;
 259
 260         mutex_lock(&pyra->pyra_lock);
 261
 262         settings = (struct pyra_settings const *)buf;
 263
 264         retval = pyra_set_settings(usb_dev, settings);
 265         if (retval) {
 266                 mutex_unlock(&pyra->pyra_lock);
 267                 return retval;
 268         }
 269
 270         profile_activated(pyra, settings->startup_profile);
 271
 272         roccat_report.type = PYRA_MOUSE_EVENT_BUTTON_TYPE_PROFILE_2;
 273         roccat_report.value = settings->startup_profile + 1;
 274         roccat_report.key = 0;
 275         roccat_report_event(pyra->chrdev_minor,
 276                         (uint8_t const *)&roccat_report);
 277
 278         mutex_unlock(&pyra->pyra_lock);
 279         return PYRA_SIZE_SETTINGS;
 280 }
 281
 282 PYRA_SYSFS_R(settings, SETTINGS);
 283 static struct bin_attribute bin_attr_settings =
 284         __BIN_ATTR(settings, (S_IWUSR | S_IRUGO),
 285                    pyra_sysfs_read_settings, pyra_sysfs_write_settings,
 286                    PYRA_SIZE_SETTINGS);
 287
 288 static ssize_t pyra_sysfs_show_actual_cpi(struct device *dev,
 289                 struct device_attribute *attr, char *buf)
 290 {
 291         struct pyra_device *pyra =
 292                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 293         return snprintf(buf, PAGE_SIZE, "%d\n", pyra->actual_cpi);
 294 }
 295 static DEVICE_ATTR(actual_cpi, 0440, pyra_sysfs_show_actual_cpi, NULL);
 296
 297 static ssize_t pyra_sysfs_show_actual_profile(struct device *dev,
 298                 struct device_attribute *attr, char *buf)
 299 {
 300         struct pyra_device *pyra =
 301                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 302         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 303         struct pyra_settings settings;
 304
 305         mutex_lock(&pyra->pyra_lock);
 306         roccat_common2_receive(usb_dev, PYRA_COMMAND_SETTINGS,
 307                         &settings, PYRA_SIZE_SETTINGS);
 308         mutex_unlock(&pyra->pyra_lock);
 309
 310         return snprintf(buf, PAGE_SIZE, "%d\n", settings.startup_profile);
 311 }
 312 static DEVICE_ATTR(actual_profile, 0440, pyra_sysfs_show_actual_profile, NULL);
 313 static DEVICE_ATTR(startup_profile, 0440, pyra_sysfs_show_actual_profile, NULL);
 314
 315 static ssize_t pyra_sysfs_show_firmware_version(struct device *dev,
 316                 struct device_attribute *attr, char *buf)
 317 {
 318         struct pyra_device *pyra;
 319         struct usb_device *usb_dev;
 320         struct pyra_info info;
 321
 322         dev = dev->parent->parent;
 323         pyra = hid_get_drvdata(dev_get_drvdata(dev));
 324         usb_dev = interface_to_usbdev(to_usb_interface(dev));
 325
 326         mutex_lock(&pyra->pyra_lock);
 327         roccat_common2_receive(usb_dev, PYRA_COMMAND_INFO,
 328                         &info, PYRA_SIZE_INFO);
 329         mutex_unlock(&pyra->pyra_lock);
 330
 331         return snprintf(buf, PAGE_SIZE, "%d\n", info.firmware_version);
 332 }
 333 static DEVICE_ATTR(firmware_version, 0440, pyra_sysfs_show_firmware_version,
 334                    NULL);
 335
 336 static struct attribute *pyra_attrs[] = {
 337         &dev_attr_actual_cpi.attr,
 338         &dev_attr_actual_profile.attr,
 339         &dev_attr_firmware_version.attr,
 340         &dev_attr_startup_profile.attr,
 341         NULL,
 342 };
 343
 344 static struct bin_attribute *pyra_bin_attributes[] = {
 345         &bin_attr_control,
 346         &bin_attr_info,
 347         &bin_attr_profile_settings,
 348         &bin_attr_profile_buttons,
 349         &bin_attr_settings,
 350         &bin_attr_profile1_settings,
 351         &bin_attr_profile2_settings,
 352         &bin_attr_profile3_settings,
 353         &bin_attr_profile4_settings,
 354         &bin_attr_profile5_settings,
 355         &bin_attr_profile1_buttons,
 356         &bin_attr_profile2_buttons,
 357         &bin_attr_profile3_buttons,
 358         &bin_attr_profile4_buttons,
 359         &bin_attr_profile5_buttons,
 360         NULL,
 361 };
 362
 363 static const struct attribute_group pyra_group = {
 364         .attrs = pyra_attrs,
 365         .bin_attrs = pyra_bin_attributes,
 366 };
 367
 368 static const struct attribute_group *pyra_groups[] = {
 369         &pyra_group,
 370         NULL,
 371 };
 372
 373 static int pyra_init_pyra_device_struct(struct usb_device *usb_dev,
 374                 struct pyra_device *pyra)
 375 {
 376         struct pyra_settings settings;
 377         int retval, i;
 378
 379         mutex_init(&pyra->pyra_lock);
 380
 381         retval = pyra_get_settings(usb_dev, &settings);
 382         if (retval)
 383                 return retval;
 384
 385         for (i = 0; i < 5; ++i) {
 386                 retval = pyra_get_profile_settings(usb_dev,
 387                                 &pyra->profile_settings[i], i);
 388                 if (retval)
 389                         return retval;
 390         }
 391
 392         profile_activated(pyra, settings.startup_profile);
 393
 394         return 0;
 395 }
 396
 397 static int pyra_init_specials(struct hid_device *hdev)
 398 {
 399         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 400         struct usb_device *usb_dev = interface_to_usbdev(intf);
 401         struct pyra_device *pyra;
 402         int retval;
 403
 404         if (intf->cur_altsetting->desc.bInterfaceProtocol
 405                         == USB_INTERFACE_PROTOCOL_MOUSE) {
 406
 407                 pyra = kzalloc(sizeof(*pyra), GFP_KERNEL);
 408                 if (!pyra) {
 409                         hid_err(hdev, "can't alloc device descriptor\n");
 410                         return -ENOMEM;
 411                 }
 412                 hid_set_drvdata(hdev, pyra);
 413
 414                 retval = pyra_init_pyra_device_struct(usb_dev, pyra);
 415                 if (retval) {
 416                         hid_err(hdev, "couldn't init struct pyra_device\n");
 417                         goto exit_free;
 418                 }
 419
 420                 retval = roccat_connect(pyra_class, hdev,
 421                                 sizeof(struct pyra_roccat_report));
 422                 if (retval < 0) {
 423                         hid_err(hdev, "couldn't init char dev\n");
 424                 } else {
 425                         pyra->chrdev_minor = retval;
 426                         pyra->roccat_claimed = 1;
 427                 }
 428         } else {
 429                 hid_set_drvdata(hdev, NULL);
 430         }
 431
 432         return 0;
 433 exit_free:
 434         kfree(pyra);
 435         return retval;
 436 }
 437
 438 static void pyra_remove_specials(struct hid_device *hdev)
 439 {
 440         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 441         struct pyra_device *pyra;
 442
 443         if (intf->cur_altsetting->desc.bInterfaceProtocol
 444                         == USB_INTERFACE_PROTOCOL_MOUSE) {
 445                 pyra = hid_get_drvdata(hdev);
 446                 if (pyra->roccat_claimed)
 447                         roccat_disconnect(pyra->chrdev_minor);
 448                 kfree(hid_get_drvdata(hdev));
 449         }
 450 }
 451
 452 static int pyra_probe(struct hid_device *hdev, const struct hid_device_id *id)
 453 {
 454         int retval;
 455
 456         retval = hid_parse(hdev);
 457         if (retval) {
 458                 hid_err(hdev, "parse failed\n");
 459                 goto exit;
 460         }
 461
 462         retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 463         if (retval) {
 464                 hid_err(hdev, "hw start failed\n");
 465                 goto exit;
 466         }
 467
 468         retval = pyra_init_specials(hdev);
 469         if (retval) {
 470                 hid_err(hdev, "couldn't install mouse\n");
 471                 goto exit_stop;
 472         }
 473         return 0;
 474
 475 exit_stop:
 476         hid_hw_stop(hdev);
 477 exit:
 478         return retval;
 479 }
 480
 481 static void pyra_remove(struct hid_device *hdev)
 482 {
 483         pyra_remove_specials(hdev);
 484         hid_hw_stop(hdev);
 485 }
 486
 487 static void pyra_keep_values_up_to_date(struct pyra_device *pyra,
 488                 u8 const *data)
 489 {
 490         struct pyra_mouse_event_button const *button_event;
 491
 492         switch (data[0]) {
 493         case PYRA_MOUSE_REPORT_NUMBER_BUTTON:
 494                 button_event = (struct pyra_mouse_event_button const *)data;
 495                 switch (button_event->type) {
 496                 case PYRA_MOUSE_EVENT_BUTTON_TYPE_PROFILE_2:
 497                         profile_activated(pyra, button_event->data1 - 1);
 498                         break;
 499                 case PYRA_MOUSE_EVENT_BUTTON_TYPE_CPI:
 500                         pyra->actual_cpi = button_event->data1;
 501                         break;
 502                 }
 503                 break;
 504         }
 505 }
 506
 507 static void pyra_report_to_chrdev(struct pyra_device const *pyra,
 508                 u8 const *data)
 509 {
 510         struct pyra_roccat_report roccat_report;
 511         struct pyra_mouse_event_button const *button_event;
 512
 513         if (data[0] != PYRA_MOUSE_REPORT_NUMBER_BUTTON)
 514                 return;
 515
 516         button_event = (struct pyra_mouse_event_button const *)data;
 517
 518         switch (button_event->type) {
 519         case PYRA_MOUSE_EVENT_BUTTON_TYPE_PROFILE_2:
 520         case PYRA_MOUSE_EVENT_BUTTON_TYPE_CPI:
 521                 roccat_report.type = button_event->type;
 522                 roccat_report.value = button_event->data1;
 523                 roccat_report.key = 0;
 524                 roccat_report_event(pyra->chrdev_minor,
 525                                 (uint8_t const *)&roccat_report);
 526                 break;
 527         case PYRA_MOUSE_EVENT_BUTTON_TYPE_MACRO:
 528         case PYRA_MOUSE_EVENT_BUTTON_TYPE_SHORTCUT:
 529         case PYRA_MOUSE_EVENT_BUTTON_TYPE_QUICKLAUNCH:
 530                 if (button_event->data2 == PYRA_MOUSE_EVENT_BUTTON_PRESS) {
 531                         roccat_report.type = button_event->type;
 532                         roccat_report.key = button_event->data1;
 533                         /*
 534                          * pyra reports profile numbers with range 1-5.
 535                          * Keeping this behaviour.
 536                          */
 537                         roccat_report.value = pyra->actual_profile + 1;
 538                         roccat_report_event(pyra->chrdev_minor,
 539                                         (uint8_t const *)&roccat_report);
 540                 }
 541                 break;
 542         }
 543 }
 544
 545 static int pyra_raw_event(struct hid_device *hdev, struct hid_report *report,
 546                 u8 *data, int size)
 547 {
 548         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 549         struct pyra_device *pyra = hid_get_drvdata(hdev);
 550
 551         if (intf->cur_altsetting->desc.bInterfaceProtocol
 552                         != USB_INTERFACE_PROTOCOL_MOUSE)
 553                 return 0;
 554
 555         if (pyra == NULL)
 556                 return 0;
 557
 558         pyra_keep_values_up_to_date(pyra, data);
 559
 560         if (pyra->roccat_claimed)
 561                 pyra_report_to_chrdev(pyra, data);
 562
 563         return 0;
 564 }
 565
 566 static const struct hid_device_id pyra_devices[] = {
 567         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT,
 568                         USB_DEVICE_ID_ROCCAT_PYRA_WIRED) },
 569         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT,
 570                         USB_DEVICE_ID_ROCCAT_PYRA_WIRELESS) },
 571         { }
 572 };
 573
 574 MODULE_DEVICE_TABLE(hid, pyra_devices);
 575
 576 static struct hid_driver pyra_driver = {
 577                 .name = "pyra",
 578                 .id_table = pyra_devices,
 579                 .probe = pyra_probe,
 580                 .remove = pyra_remove,
 581                 .raw_event = pyra_raw_event
 582 };
 583
 584 static int __init pyra_init(void)
 585 {
 586         int retval;
 587
 588         /* class name has to be same as driver name */
 589         pyra_class = class_create(THIS_MODULE, "pyra");
 590         if (IS_ERR(pyra_class))
 591                 return PTR_ERR(pyra_class);
 592         pyra_class->dev_groups = pyra_groups;
 593
 594         retval = hid_register_driver(&pyra_driver);
 595         if (retval)
 596                 class_destroy(pyra_class);
 597         return retval;
 598 }
 599
 600 static void __exit pyra_exit(void)
 601 {
 602         hid_unregister_driver(&pyra_driver);
 603         class_destroy(pyra_class);
 604 }
 605
 606 module_init(pyra_init);
 607 module_exit(pyra_exit);
 608
 609 MODULE_AUTHOR("Stefan Achatz");
 610 MODULE_DESCRIPTION("USB Roccat Pyra driver");
 611 MODULE_LICENSE("GPL v2");