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         if (new_profile >= ARRAY_SIZE(pyra->profile_settings))
  39                 return;
  40         pyra->actual_profile = new_profile;
  41         pyra->actual_cpi = pyra->profile_settings[pyra->actual_profile].y_cpi;
  42 }
  43
  44 static int pyra_send_control(struct usb_device *usb_dev, int value,
  45                 enum pyra_control_requests request)
  46 {
  47         struct roccat_common2_control control;
  48
  49         if ((request == PYRA_CONTROL_REQUEST_PROFILE_SETTINGS ||
  50                         request == PYRA_CONTROL_REQUEST_PROFILE_BUTTONS) &&
  51                         (value < 0 || value > 4))
  52                 return -EINVAL;
  53
  54         control.command = ROCCAT_COMMON_COMMAND_CONTROL;
  55         control.value = value;
  56         control.request = request;
  57
  58         return roccat_common2_send(usb_dev, ROCCAT_COMMON_COMMAND_CONTROL,
  59                         &control, sizeof(struct roccat_common2_control));
  60 }
  61
  62 static int pyra_get_profile_settings(struct usb_device *usb_dev,
  63                 struct pyra_profile_settings *buf, int number)
  64 {
  65         int retval;
  66         retval = pyra_send_control(usb_dev, number,
  67                         PYRA_CONTROL_REQUEST_PROFILE_SETTINGS);
  68         if (retval)
  69                 return retval;
  70         return roccat_common2_receive(usb_dev, PYRA_COMMAND_PROFILE_SETTINGS,
  71                         buf, PYRA_SIZE_PROFILE_SETTINGS);
  72 }
  73
  74 static int pyra_get_settings(struct usb_device *usb_dev,
  75                 struct pyra_settings *buf)
  76 {
  77         return roccat_common2_receive(usb_dev, PYRA_COMMAND_SETTINGS,
  78                         buf, PYRA_SIZE_SETTINGS);
  79 }
  80
  81 static int pyra_set_settings(struct usb_device *usb_dev,
  82                 struct pyra_settings const *settings)
  83 {
  84         return roccat_common2_send_with_status(usb_dev,
  85                         PYRA_COMMAND_SETTINGS, settings,
  86                         PYRA_SIZE_SETTINGS);
  87 }
  88
  89 static ssize_t pyra_sysfs_read(struct file *fp, struct kobject *kobj,
  90                 char *buf, loff_t off, size_t count,
  91                 size_t real_size, uint command)
  92 {
  93         struct device *dev =
  94                         container_of(kobj, struct device, kobj)->parent->parent;
  95         struct pyra_device *pyra = hid_get_drvdata(dev_get_drvdata(dev));
  96         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
  97         int retval;
  98
  99         if (off >= real_size)
 100                 return 0;
 101
 102         if (off != 0 || count != real_size)
 103                 return -EINVAL;
 104
 105         mutex_lock(&pyra->pyra_lock);
 106         retval = roccat_common2_receive(usb_dev, command, buf, real_size);
 107         mutex_unlock(&pyra->pyra_lock);
 108
 109         if (retval)
 110                 return retval;
 111
 112         return real_size;
 113 }
 114
 115 static ssize_t pyra_sysfs_write(struct file *fp, struct kobject *kobj,
 116                 void const *buf, loff_t off, size_t count,
 117                 size_t real_size, uint command)
 118 {
 119         struct device *dev =
 120                         container_of(kobj, struct device, kobj)->parent->parent;
 121         struct pyra_device *pyra = hid_get_drvdata(dev_get_drvdata(dev));
 122         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 123         int retval;
 124
 125         if (off != 0 || count != real_size)
 126                 return -EINVAL;
 127
 128         mutex_lock(&pyra->pyra_lock);
 129         retval = roccat_common2_send_with_status(usb_dev, command, (void *)buf, real_size);
 130         mutex_unlock(&pyra->pyra_lock);
 131
 132         if (retval)
 133                 return retval;
 134
 135         return real_size;
 136 }
 137
 138 #define PYRA_SYSFS_W(thingy, THINGY) \
 139 static ssize_t pyra_sysfs_write_ ## thingy(struct file *fp, \
 140                 struct kobject *kobj, struct bin_attribute *attr, char *buf, \
 141                 loff_t off, size_t count) \
 142 { \
 143         return pyra_sysfs_write(fp, kobj, buf, off, count, \
 144                         PYRA_SIZE_ ## THINGY, PYRA_COMMAND_ ## THINGY); \
 145 }
 146
 147 #define PYRA_SYSFS_R(thingy, THINGY) \
 148 static ssize_t pyra_sysfs_read_ ## thingy(struct file *fp, \
 149                 struct kobject *kobj, struct bin_attribute *attr, char *buf, \
 150                 loff_t off, size_t count) \
 151 { \
 152         return pyra_sysfs_read(fp, kobj, buf, off, count, \
 153                         PYRA_SIZE_ ## THINGY, PYRA_COMMAND_ ## THINGY); \
 154 }
 155
 156 #define PYRA_SYSFS_RW(thingy, THINGY) \
 157 PYRA_SYSFS_W(thingy, THINGY) \
 158 PYRA_SYSFS_R(thingy, THINGY)
 159
 160 #define PYRA_BIN_ATTRIBUTE_RW(thingy, THINGY) \
 161 PYRA_SYSFS_RW(thingy, THINGY); \
 162 static struct bin_attribute bin_attr_##thingy = { \
 163         .attr = { .name = #thingy, .mode = 0660 }, \
 164         .size = PYRA_SIZE_ ## THINGY, \
 165         .read = pyra_sysfs_read_ ## thingy, \
 166         .write = pyra_sysfs_write_ ## thingy \
 167 }
 168
 169 #define PYRA_BIN_ATTRIBUTE_R(thingy, THINGY) \
 170 PYRA_SYSFS_R(thingy, THINGY); \
 171 static struct bin_attribute bin_attr_##thingy = { \
 172         .attr = { .name = #thingy, .mode = 0440 }, \
 173         .size = PYRA_SIZE_ ## THINGY, \
 174         .read = pyra_sysfs_read_ ## thingy, \
 175 }
 176
 177 #define PYRA_BIN_ATTRIBUTE_W(thingy, THINGY) \
 178 PYRA_SYSFS_W(thingy, THINGY); \
 179 static struct bin_attribute bin_attr_##thingy = { \
 180         .attr = { .name = #thingy, .mode = 0220 }, \
 181         .size = PYRA_SIZE_ ## THINGY, \
 182         .write = pyra_sysfs_write_ ## thingy \
 183 }
 184
 185 PYRA_BIN_ATTRIBUTE_W(control, CONTROL);
 186 PYRA_BIN_ATTRIBUTE_RW(info, INFO);
 187 PYRA_BIN_ATTRIBUTE_RW(profile_settings, PROFILE_SETTINGS);
 188 PYRA_BIN_ATTRIBUTE_RW(profile_buttons, PROFILE_BUTTONS);
 189
 190 static ssize_t pyra_sysfs_read_profilex_settings(struct file *fp,
 191                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
 192                 loff_t off, size_t count)
 193 {
 194         struct device *dev =
 195                         container_of(kobj, struct device, kobj)->parent->parent;
 196         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 197         ssize_t retval;
 198
 199         retval = pyra_send_control(usb_dev, *(uint *)(attr->private),
 200                         PYRA_CONTROL_REQUEST_PROFILE_SETTINGS);
 201         if (retval)
 202                 return retval;
 203
 204         return pyra_sysfs_read(fp, kobj, buf, off, count,
 205                         PYRA_SIZE_PROFILE_SETTINGS,
 206                         PYRA_COMMAND_PROFILE_SETTINGS);
 207 }
 208
 209 static ssize_t pyra_sysfs_read_profilex_buttons(struct file *fp,
 210                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
 211                 loff_t off, size_t count)
 212 {
 213         struct device *dev =
 214                         container_of(kobj, struct device, kobj)->parent->parent;
 215         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 216         ssize_t retval;
 217
 218         retval = pyra_send_control(usb_dev, *(uint *)(attr->private),
 219                         PYRA_CONTROL_REQUEST_PROFILE_BUTTONS);
 220         if (retval)
 221                 return retval;
 222
 223         return pyra_sysfs_read(fp, kobj, buf, off, count,
 224                         PYRA_SIZE_PROFILE_BUTTONS,
 225                         PYRA_COMMAND_PROFILE_BUTTONS);
 226 }
 227
 228 #define PROFILE_ATTR(number)                                            \
 229 static struct bin_attribute bin_attr_profile##number##_settings = {     \
 230         .attr = { .name = "profile" #number "_settings", .mode = 0440 },        \
 231         .size = PYRA_SIZE_PROFILE_SETTINGS,                             \
 232         .read = pyra_sysfs_read_profilex_settings,                      \
 233         .private = &profile_numbers[number-1],                          \
 234 };                                                                      \
 235 static struct bin_attribute bin_attr_profile##number##_buttons = {      \
 236         .attr = { .name = "profile" #number "_buttons", .mode = 0440 }, \
 237         .size = PYRA_SIZE_PROFILE_BUTTONS,                              \
 238         .read = pyra_sysfs_read_profilex_buttons,                       \
 239         .private = &profile_numbers[number-1],                          \
 240 };
 241 PROFILE_ATTR(1);
 242 PROFILE_ATTR(2);
 243 PROFILE_ATTR(3);
 244 PROFILE_ATTR(4);
 245 PROFILE_ATTR(5);
 246
 247 static ssize_t pyra_sysfs_write_settings(struct file *fp,
 248                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
 249                 loff_t off, size_t count)
 250 {
 251         struct device *dev =
 252                         container_of(kobj, struct device, kobj)->parent->parent;
 253         struct pyra_device *pyra = hid_get_drvdata(dev_get_drvdata(dev));
 254         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 255         int retval = 0;
 256         struct pyra_roccat_report roccat_report;
 257         struct pyra_settings const *settings;
 258
 259         if (off != 0 || count != PYRA_SIZE_SETTINGS)
 260                 return -EINVAL;
 261
 262         settings = (struct pyra_settings const *)buf;
 263         if (settings->startup_profile >= ARRAY_SIZE(pyra->profile_settings))
 264                 return -EINVAL;
 265
 266         mutex_lock(&pyra->pyra_lock);
 267
 268         retval = pyra_set_settings(usb_dev, settings);
 269         if (retval) {
 270                 mutex_unlock(&pyra->pyra_lock);
 271                 return retval;
 272         }
 273
 274         profile_activated(pyra, settings->startup_profile);
 275
 276         roccat_report.type = PYRA_MOUSE_EVENT_BUTTON_TYPE_PROFILE_2;
 277         roccat_report.value = settings->startup_profile + 1;
 278         roccat_report.key = 0;
 279         roccat_report_event(pyra->chrdev_minor,
 280                         (uint8_t const *)&roccat_report);
 281
 282         mutex_unlock(&pyra->pyra_lock);
 283         return PYRA_SIZE_SETTINGS;
 284 }
 285
 286 PYRA_SYSFS_R(settings, SETTINGS);
 287 static struct bin_attribute bin_attr_settings =
 288         __BIN_ATTR(settings, (S_IWUSR | S_IRUGO),
 289                    pyra_sysfs_read_settings, pyra_sysfs_write_settings,
 290                    PYRA_SIZE_SETTINGS);
 291
 292 static ssize_t pyra_sysfs_show_actual_cpi(struct device *dev,
 293                 struct device_attribute *attr, char *buf)
 294 {
 295         struct pyra_device *pyra =
 296                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 297         return snprintf(buf, PAGE_SIZE, "%d\n", pyra->actual_cpi);
 298 }
 299 static DEVICE_ATTR(actual_cpi, 0440, pyra_sysfs_show_actual_cpi, NULL);
 300
 301 static ssize_t pyra_sysfs_show_actual_profile(struct device *dev,
 302                 struct device_attribute *attr, char *buf)
 303 {
 304         struct pyra_device *pyra =
 305                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 306         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 307         struct pyra_settings settings;
 308
 309         mutex_lock(&pyra->pyra_lock);
 310         roccat_common2_receive(usb_dev, PYRA_COMMAND_SETTINGS,
 311                         &settings, PYRA_SIZE_SETTINGS);
 312         mutex_unlock(&pyra->pyra_lock);
 313
 314         return snprintf(buf, PAGE_SIZE, "%d\n", settings.startup_profile);
 315 }
 316 static DEVICE_ATTR(actual_profile, 0440, pyra_sysfs_show_actual_profile, NULL);
 317 static DEVICE_ATTR(startup_profile, 0440, pyra_sysfs_show_actual_profile, NULL);
 318
 319 static ssize_t pyra_sysfs_show_firmware_version(struct device *dev,
 320                 struct device_attribute *attr, char *buf)
 321 {
 322         struct pyra_device *pyra;
 323         struct usb_device *usb_dev;
 324         struct pyra_info info;
 325
 326         dev = dev->parent->parent;
 327         pyra = hid_get_drvdata(dev_get_drvdata(dev));
 328         usb_dev = interface_to_usbdev(to_usb_interface(dev));
 329
 330         mutex_lock(&pyra->pyra_lock);
 331         roccat_common2_receive(usb_dev, PYRA_COMMAND_INFO,
 332                         &info, PYRA_SIZE_INFO);
 333         mutex_unlock(&pyra->pyra_lock);
 334
 335         return snprintf(buf, PAGE_SIZE, "%d\n", info.firmware_version);
 336 }
 337 static DEVICE_ATTR(firmware_version, 0440, pyra_sysfs_show_firmware_version,
 338                    NULL);
 339
 340 static struct attribute *pyra_attrs[] = {
 341         &dev_attr_actual_cpi.attr,
 342         &dev_attr_actual_profile.attr,
 343         &dev_attr_firmware_version.attr,
 344         &dev_attr_startup_profile.attr,
 345         NULL,
 346 };
 347
 348 static struct bin_attribute *pyra_bin_attributes[] = {
 349         &bin_attr_control,
 350         &bin_attr_info,
 351         &bin_attr_profile_settings,
 352         &bin_attr_profile_buttons,
 353         &bin_attr_settings,
 354         &bin_attr_profile1_settings,
 355         &bin_attr_profile2_settings,
 356         &bin_attr_profile3_settings,
 357         &bin_attr_profile4_settings,
 358         &bin_attr_profile5_settings,
 359         &bin_attr_profile1_buttons,
 360         &bin_attr_profile2_buttons,
 361         &bin_attr_profile3_buttons,
 362         &bin_attr_profile4_buttons,
 363         &bin_attr_profile5_buttons,
 364         NULL,
 365 };
 366
 367 static const struct attribute_group pyra_group = {
 368         .attrs = pyra_attrs,
 369         .bin_attrs = pyra_bin_attributes,
 370 };
 371
 372 static const struct attribute_group *pyra_groups[] = {
 373         &pyra_group,
 374         NULL,
 375 };
 376
 377 static int pyra_init_pyra_device_struct(struct usb_device *usb_dev,
 378                 struct pyra_device *pyra)
 379 {
 380         struct pyra_settings settings;
 381         int retval, i;
 382
 383         mutex_init(&pyra->pyra_lock);
 384
 385         retval = pyra_get_settings(usb_dev, &settings);
 386         if (retval)
 387                 return retval;
 388
 389         for (i = 0; i < 5; ++i) {
 390                 retval = pyra_get_profile_settings(usb_dev,
 391                                 &pyra->profile_settings[i], i);
 392                 if (retval)
 393                         return retval;
 394         }
 395
 396         profile_activated(pyra, settings.startup_profile);
 397
 398         return 0;
 399 }
 400
 401 static int pyra_init_specials(struct hid_device *hdev)
 402 {
 403         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 404         struct usb_device *usb_dev = interface_to_usbdev(intf);
 405         struct pyra_device *pyra;
 406         int retval;
 407
 408         if (intf->cur_altsetting->desc.bInterfaceProtocol
 409                         == USB_INTERFACE_PROTOCOL_MOUSE) {
 410
 411                 pyra = kzalloc(sizeof(*pyra), GFP_KERNEL);
 412                 if (!pyra) {
 413                         hid_err(hdev, "can't alloc device descriptor\n");
 414                         return -ENOMEM;
 415                 }
 416                 hid_set_drvdata(hdev, pyra);
 417
 418                 retval = pyra_init_pyra_device_struct(usb_dev, pyra);
 419                 if (retval) {
 420                         hid_err(hdev, "couldn't init struct pyra_device\n");
 421                         goto exit_free;
 422                 }
 423
 424                 retval = roccat_connect(pyra_class, hdev,
 425                                 sizeof(struct pyra_roccat_report));
 426                 if (retval < 0) {
 427                         hid_err(hdev, "couldn't init char dev\n");
 428                 } else {
 429                         pyra->chrdev_minor = retval;
 430                         pyra->roccat_claimed = 1;
 431                 }
 432         } else {
 433                 hid_set_drvdata(hdev, NULL);
 434         }
 435
 436         return 0;
 437 exit_free:
 438         kfree(pyra);
 439         return retval;
 440 }
 441
 442 static void pyra_remove_specials(struct hid_device *hdev)
 443 {
 444         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 445         struct pyra_device *pyra;
 446
 447         if (intf->cur_altsetting->desc.bInterfaceProtocol
 448                         == USB_INTERFACE_PROTOCOL_MOUSE) {
 449                 pyra = hid_get_drvdata(hdev);
 450                 if (pyra->roccat_claimed)
 451                         roccat_disconnect(pyra->chrdev_minor);
 452                 kfree(hid_get_drvdata(hdev));
 453         }
 454 }
 455
 456 static int pyra_probe(struct hid_device *hdev, const struct hid_device_id *id)
 457 {
 458         int retval;
 459
 460         retval = hid_parse(hdev);
 461         if (retval) {
 462                 hid_err(hdev, "parse failed\n");
 463                 goto exit;
 464         }
 465
 466         retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 467         if (retval) {
 468                 hid_err(hdev, "hw start failed\n");
 469                 goto exit;
 470         }
 471
 472         retval = pyra_init_specials(hdev);
 473         if (retval) {
 474                 hid_err(hdev, "couldn't install mouse\n");
 475                 goto exit_stop;
 476         }
 477         return 0;
 478
 479 exit_stop:
 480         hid_hw_stop(hdev);
 481 exit:
 482         return retval;
 483 }
 484
 485 static void pyra_remove(struct hid_device *hdev)
 486 {
 487         pyra_remove_specials(hdev);
 488         hid_hw_stop(hdev);
 489 }
 490
 491 static void pyra_keep_values_up_to_date(struct pyra_device *pyra,
 492                 u8 const *data)
 493 {
 494         struct pyra_mouse_event_button const *button_event;
 495
 496         switch (data[0]) {
 497         case PYRA_MOUSE_REPORT_NUMBER_BUTTON:
 498                 button_event = (struct pyra_mouse_event_button const *)data;
 499                 switch (button_event->type) {
 500                 case PYRA_MOUSE_EVENT_BUTTON_TYPE_PROFILE_2:
 501                         profile_activated(pyra, button_event->data1 - 1);
 502                         break;
 503                 case PYRA_MOUSE_EVENT_BUTTON_TYPE_CPI:
 504                         pyra->actual_cpi = button_event->data1;
 505                         break;
 506                 }
 507                 break;
 508         }
 509 }
 510
 511 static void pyra_report_to_chrdev(struct pyra_device const *pyra,
 512                 u8 const *data)
 513 {
 514         struct pyra_roccat_report roccat_report;
 515         struct pyra_mouse_event_button const *button_event;
 516
 517         if (data[0] != PYRA_MOUSE_REPORT_NUMBER_BUTTON)
 518                 return;
 519
 520         button_event = (struct pyra_mouse_event_button const *)data;
 521
 522         switch (button_event->type) {
 523         case PYRA_MOUSE_EVENT_BUTTON_TYPE_PROFILE_2:
 524         case PYRA_MOUSE_EVENT_BUTTON_TYPE_CPI:
 525                 roccat_report.type = button_event->type;
 526                 roccat_report.value = button_event->data1;
 527                 roccat_report.key = 0;
 528                 roccat_report_event(pyra->chrdev_minor,
 529                                 (uint8_t const *)&roccat_report);
 530                 break;
 531         case PYRA_MOUSE_EVENT_BUTTON_TYPE_MACRO:
 532         case PYRA_MOUSE_EVENT_BUTTON_TYPE_SHORTCUT:
 533         case PYRA_MOUSE_EVENT_BUTTON_TYPE_QUICKLAUNCH:
 534                 if (button_event->data2 == PYRA_MOUSE_EVENT_BUTTON_PRESS) {
 535                         roccat_report.type = button_event->type;
 536                         roccat_report.key = button_event->data1;
 537                         /*
 538                          * pyra reports profile numbers with range 1-5.
 539                          * Keeping this behaviour.
 540                          */
 541                         roccat_report.value = pyra->actual_profile + 1;
 542                         roccat_report_event(pyra->chrdev_minor,
 543                                         (uint8_t const *)&roccat_report);
 544                 }
 545                 break;
 546         }
 547 }
 548
 549 static int pyra_raw_event(struct hid_device *hdev, struct hid_report *report,
 550                 u8 *data, int size)
 551 {
 552         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 553         struct pyra_device *pyra = hid_get_drvdata(hdev);
 554
 555         if (intf->cur_altsetting->desc.bInterfaceProtocol
 556                         != USB_INTERFACE_PROTOCOL_MOUSE)
 557                 return 0;
 558
 559         if (pyra == NULL)
 560                 return 0;
 561
 562         pyra_keep_values_up_to_date(pyra, data);
 563
 564         if (pyra->roccat_claimed)
 565                 pyra_report_to_chrdev(pyra, data);
 566
 567         return 0;
 568 }
 569
 570 static const struct hid_device_id pyra_devices[] = {
 571         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT,
 572                         USB_DEVICE_ID_ROCCAT_PYRA_WIRED) },
 573         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT,
 574                         USB_DEVICE_ID_ROCCAT_PYRA_WIRELESS) },
 575         { }
 576 };
 577
 578 MODULE_DEVICE_TABLE(hid, pyra_devices);
 579
 580 static struct hid_driver pyra_driver = {
 581                 .name = "pyra",
 582                 .id_table = pyra_devices,
 583                 .probe = pyra_probe,
 584                 .remove = pyra_remove,
 585                 .raw_event = pyra_raw_event
 586 };
 587
 588 static int __init pyra_init(void)
 589 {
 590         int retval;
 591
 592         /* class name has to be same as driver name */
 593         pyra_class = class_create(THIS_MODULE, "pyra");
 594         if (IS_ERR(pyra_class))
 595                 return PTR_ERR(pyra_class);
 596         pyra_class->dev_groups = pyra_groups;
 597
 598         retval = hid_register_driver(&pyra_driver);
 599         if (retval)
 600                 class_destroy(pyra_class);
 601         return retval;
 602 }
 603
 604 static void __exit pyra_exit(void)
 605 {
 606         hid_unregister_driver(&pyra_driver);
 607         class_destroy(pyra_class);
 608 }
 609
 610 module_init(pyra_init);
 611 module_exit(pyra_exit);
 612
 613 MODULE_AUTHOR("Stefan Achatz");
 614 MODULE_DESCRIPTION("USB Roccat Pyra driver");
 615 MODULE_LICENSE("GPL v2");