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 { \
 160         .attr = { .name = #thingy, .mode = 0660 }, \
 161         .size = PYRA_SIZE_ ## THINGY, \
 162         .read = pyra_sysfs_read_ ## thingy, \
 163         .write = pyra_sysfs_write_ ## thingy \
 164 }
 165
 166 #define PYRA_BIN_ATTRIBUTE_R(thingy, THINGY) \
 167 { \
 168         .attr = { .name = #thingy, .mode = 0440 }, \
 169         .size = PYRA_SIZE_ ## THINGY, \
 170         .read = pyra_sysfs_read_ ## thingy, \
 171 }
 172
 173 #define PYRA_BIN_ATTRIBUTE_W(thingy, THINGY) \
 174 { \
 175         .attr = { .name = #thingy, .mode = 0220 }, \
 176         .size = PYRA_SIZE_ ## THINGY, \
 177         .write = pyra_sysfs_write_ ## thingy \
 178 }
 179
 180 PYRA_SYSFS_W(control, CONTROL)
 181 PYRA_SYSFS_RW(info, INFO)
 182 PYRA_SYSFS_RW(profile_settings, PROFILE_SETTINGS)
 183 PYRA_SYSFS_RW(profile_buttons, PROFILE_BUTTONS)
 184 PYRA_SYSFS_R(settings, SETTINGS)
 185
 186 static ssize_t pyra_sysfs_read_profilex_settings(struct file *fp,
 187                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
 188                 loff_t off, size_t count)
 189 {
 190         struct device *dev =
 191                         container_of(kobj, struct device, kobj)->parent->parent;
 192         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 193         ssize_t retval;
 194
 195         retval = pyra_send_control(usb_dev, *(uint *)(attr->private),
 196                         PYRA_CONTROL_REQUEST_PROFILE_SETTINGS);
 197         if (retval)
 198                 return retval;
 199
 200         return pyra_sysfs_read(fp, kobj, buf, off, count,
 201                         PYRA_SIZE_PROFILE_SETTINGS,
 202                         PYRA_COMMAND_PROFILE_SETTINGS);
 203 }
 204
 205 static ssize_t pyra_sysfs_read_profilex_buttons(struct file *fp,
 206                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
 207                 loff_t off, size_t count)
 208 {
 209         struct device *dev =
 210                         container_of(kobj, struct device, kobj)->parent->parent;
 211         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 212         ssize_t retval;
 213
 214         retval = pyra_send_control(usb_dev, *(uint *)(attr->private),
 215                         PYRA_CONTROL_REQUEST_PROFILE_BUTTONS);
 216         if (retval)
 217                 return retval;
 218
 219         return pyra_sysfs_read(fp, kobj, buf, off, count,
 220                         PYRA_SIZE_PROFILE_BUTTONS,
 221                         PYRA_COMMAND_PROFILE_BUTTONS);
 222 }
 223
 224 static ssize_t pyra_sysfs_write_settings(struct file *fp,
 225                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
 226                 loff_t off, size_t count)
 227 {
 228         struct device *dev =
 229                         container_of(kobj, struct device, kobj)->parent->parent;
 230         struct pyra_device *pyra = hid_get_drvdata(dev_get_drvdata(dev));
 231         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 232         int retval = 0;
 233         struct pyra_roccat_report roccat_report;
 234         struct pyra_settings const *settings;
 235
 236         if (off != 0 || count != PYRA_SIZE_SETTINGS)
 237                 return -EINVAL;
 238
 239         mutex_lock(&pyra->pyra_lock);
 240
 241         settings = (struct pyra_settings const *)buf;
 242
 243         retval = pyra_set_settings(usb_dev, settings);
 244         if (retval) {
 245                 mutex_unlock(&pyra->pyra_lock);
 246                 return retval;
 247         }
 248
 249         profile_activated(pyra, settings->startup_profile);
 250
 251         roccat_report.type = PYRA_MOUSE_EVENT_BUTTON_TYPE_PROFILE_2;
 252         roccat_report.value = settings->startup_profile + 1;
 253         roccat_report.key = 0;
 254         roccat_report_event(pyra->chrdev_minor,
 255                         (uint8_t const *)&roccat_report);
 256
 257         mutex_unlock(&pyra->pyra_lock);
 258         return PYRA_SIZE_SETTINGS;
 259 }
 260
 261
 262 static ssize_t pyra_sysfs_show_actual_cpi(struct device *dev,
 263                 struct device_attribute *attr, char *buf)
 264 {
 265         struct pyra_device *pyra =
 266                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 267         return snprintf(buf, PAGE_SIZE, "%d\n", pyra->actual_cpi);
 268 }
 269
 270 static ssize_t pyra_sysfs_show_actual_profile(struct device *dev,
 271                 struct device_attribute *attr, char *buf)
 272 {
 273         struct pyra_device *pyra =
 274                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 275         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 276         struct pyra_settings settings;
 277
 278         mutex_lock(&pyra->pyra_lock);
 279         roccat_common2_receive(usb_dev, PYRA_COMMAND_SETTINGS,
 280                         &settings, PYRA_SIZE_SETTINGS);
 281         mutex_unlock(&pyra->pyra_lock);
 282
 283         return snprintf(buf, PAGE_SIZE, "%d\n", settings.startup_profile);
 284 }
 285
 286 static ssize_t pyra_sysfs_show_firmware_version(struct device *dev,
 287                 struct device_attribute *attr, char *buf)
 288 {
 289         struct pyra_device *pyra;
 290         struct usb_device *usb_dev;
 291         struct pyra_info info;
 292
 293         dev = dev->parent->parent;
 294         pyra = hid_get_drvdata(dev_get_drvdata(dev));
 295         usb_dev = interface_to_usbdev(to_usb_interface(dev));
 296
 297         mutex_lock(&pyra->pyra_lock);
 298         roccat_common2_receive(usb_dev, PYRA_COMMAND_INFO,
 299                         &info, PYRA_SIZE_INFO);
 300         mutex_unlock(&pyra->pyra_lock);
 301
 302         return snprintf(buf, PAGE_SIZE, "%d\n", info.firmware_version);
 303 }
 304
 305 static struct device_attribute pyra_attributes[] = {
 306         __ATTR(actual_cpi, 0440, pyra_sysfs_show_actual_cpi, NULL),
 307         __ATTR(actual_profile, 0440, pyra_sysfs_show_actual_profile, NULL),
 308         __ATTR(firmware_version, 0440,
 309                         pyra_sysfs_show_firmware_version, NULL),
 310         __ATTR(startup_profile, 0440,
 311                         pyra_sysfs_show_actual_profile, NULL),
 312         __ATTR_NULL
 313 };
 314
 315 static struct bin_attribute pyra_bin_attributes[] = {
 316         PYRA_BIN_ATTRIBUTE_W(control, CONTROL),
 317         PYRA_BIN_ATTRIBUTE_RW(info, INFO),
 318         PYRA_BIN_ATTRIBUTE_RW(profile_settings, PROFILE_SETTINGS),
 319         PYRA_BIN_ATTRIBUTE_RW(profile_buttons, PROFILE_BUTTONS),
 320         PYRA_BIN_ATTRIBUTE_RW(settings, SETTINGS),
 321         {
 322                 .attr = { .name = "profile1_settings", .mode = 0440 },
 323                 .size = PYRA_SIZE_PROFILE_SETTINGS,
 324                 .read = pyra_sysfs_read_profilex_settings,
 325                 .private = &profile_numbers[0]
 326         },
 327         {
 328                 .attr = { .name = "profile2_settings", .mode = 0440 },
 329                 .size = PYRA_SIZE_PROFILE_SETTINGS,
 330                 .read = pyra_sysfs_read_profilex_settings,
 331                 .private = &profile_numbers[1]
 332         },
 333         {
 334                 .attr = { .name = "profile3_settings", .mode = 0440 },
 335                 .size = PYRA_SIZE_PROFILE_SETTINGS,
 336                 .read = pyra_sysfs_read_profilex_settings,
 337                 .private = &profile_numbers[2]
 338         },
 339         {
 340                 .attr = { .name = "profile4_settings", .mode = 0440 },
 341                 .size = PYRA_SIZE_PROFILE_SETTINGS,
 342                 .read = pyra_sysfs_read_profilex_settings,
 343                 .private = &profile_numbers[3]
 344         },
 345         {
 346                 .attr = { .name = "profile5_settings", .mode = 0440 },
 347                 .size = PYRA_SIZE_PROFILE_SETTINGS,
 348                 .read = pyra_sysfs_read_profilex_settings,
 349                 .private = &profile_numbers[4]
 350         },
 351         {
 352                 .attr = { .name = "profile1_buttons", .mode = 0440 },
 353                 .size = PYRA_SIZE_PROFILE_BUTTONS,
 354                 .read = pyra_sysfs_read_profilex_buttons,
 355                 .private = &profile_numbers[0]
 356         },
 357         {
 358                 .attr = { .name = "profile2_buttons", .mode = 0440 },
 359                 .size = PYRA_SIZE_PROFILE_BUTTONS,
 360                 .read = pyra_sysfs_read_profilex_buttons,
 361                 .private = &profile_numbers[1]
 362         },
 363         {
 364                 .attr = { .name = "profile3_buttons", .mode = 0440 },
 365                 .size = PYRA_SIZE_PROFILE_BUTTONS,
 366                 .read = pyra_sysfs_read_profilex_buttons,
 367                 .private = &profile_numbers[2]
 368         },
 369         {
 370                 .attr = { .name = "profile4_buttons", .mode = 0440 },
 371                 .size = PYRA_SIZE_PROFILE_BUTTONS,
 372                 .read = pyra_sysfs_read_profilex_buttons,
 373                 .private = &profile_numbers[3]
 374         },
 375         {
 376                 .attr = { .name = "profile5_buttons", .mode = 0440 },
 377                 .size = PYRA_SIZE_PROFILE_BUTTONS,
 378                 .read = pyra_sysfs_read_profilex_buttons,
 379                 .private = &profile_numbers[4]
 380         },
 381         __ATTR_NULL
 382 };
 383
 384 static int pyra_init_pyra_device_struct(struct usb_device *usb_dev,
 385                 struct pyra_device *pyra)
 386 {
 387         struct pyra_settings settings;
 388         int retval, i;
 389
 390         mutex_init(&pyra->pyra_lock);
 391
 392         retval = pyra_get_settings(usb_dev, &settings);
 393         if (retval)
 394                 return retval;
 395
 396         for (i = 0; i < 5; ++i) {
 397                 retval = pyra_get_profile_settings(usb_dev,
 398                                 &pyra->profile_settings[i], i);
 399                 if (retval)
 400                         return retval;
 401         }
 402
 403         profile_activated(pyra, settings.startup_profile);
 404
 405         return 0;
 406 }
 407
 408 static int pyra_init_specials(struct hid_device *hdev)
 409 {
 410         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 411         struct usb_device *usb_dev = interface_to_usbdev(intf);
 412         struct pyra_device *pyra;
 413         int retval;
 414
 415         if (intf->cur_altsetting->desc.bInterfaceProtocol
 416                         == USB_INTERFACE_PROTOCOL_MOUSE) {
 417
 418                 pyra = kzalloc(sizeof(*pyra), GFP_KERNEL);
 419                 if (!pyra) {
 420                         hid_err(hdev, "can't alloc device descriptor\n");
 421                         return -ENOMEM;
 422                 }
 423                 hid_set_drvdata(hdev, pyra);
 424
 425                 retval = pyra_init_pyra_device_struct(usb_dev, pyra);
 426                 if (retval) {
 427                         hid_err(hdev, "couldn't init struct pyra_device\n");
 428                         goto exit_free;
 429                 }
 430
 431                 retval = roccat_connect(pyra_class, hdev,
 432                                 sizeof(struct pyra_roccat_report));
 433                 if (retval < 0) {
 434                         hid_err(hdev, "couldn't init char dev\n");
 435                 } else {
 436                         pyra->chrdev_minor = retval;
 437                         pyra->roccat_claimed = 1;
 438                 }
 439         } else {
 440                 hid_set_drvdata(hdev, NULL);
 441         }
 442
 443         return 0;
 444 exit_free:
 445         kfree(pyra);
 446         return retval;
 447 }
 448
 449 static void pyra_remove_specials(struct hid_device *hdev)
 450 {
 451         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 452         struct pyra_device *pyra;
 453
 454         if (intf->cur_altsetting->desc.bInterfaceProtocol
 455                         == USB_INTERFACE_PROTOCOL_MOUSE) {
 456                 pyra = hid_get_drvdata(hdev);
 457                 if (pyra->roccat_claimed)
 458                         roccat_disconnect(pyra->chrdev_minor);
 459                 kfree(hid_get_drvdata(hdev));
 460         }
 461 }
 462
 463 static int pyra_probe(struct hid_device *hdev, const struct hid_device_id *id)
 464 {
 465         int retval;
 466
 467         retval = hid_parse(hdev);
 468         if (retval) {
 469                 hid_err(hdev, "parse failed\n");
 470                 goto exit;
 471         }
 472
 473         retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 474         if (retval) {
 475                 hid_err(hdev, "hw start failed\n");
 476                 goto exit;
 477         }
 478
 479         retval = pyra_init_specials(hdev);
 480         if (retval) {
 481                 hid_err(hdev, "couldn't install mouse\n");
 482                 goto exit_stop;
 483         }
 484         return 0;
 485
 486 exit_stop:
 487         hid_hw_stop(hdev);
 488 exit:
 489         return retval;
 490 }
 491
 492 static void pyra_remove(struct hid_device *hdev)
 493 {
 494         pyra_remove_specials(hdev);
 495         hid_hw_stop(hdev);
 496 }
 497
 498 static void pyra_keep_values_up_to_date(struct pyra_device *pyra,
 499                 u8 const *data)
 500 {
 501         struct pyra_mouse_event_button const *button_event;
 502
 503         switch (data[0]) {
 504         case PYRA_MOUSE_REPORT_NUMBER_BUTTON:
 505                 button_event = (struct pyra_mouse_event_button const *)data;
 506                 switch (button_event->type) {
 507                 case PYRA_MOUSE_EVENT_BUTTON_TYPE_PROFILE_2:
 508                         profile_activated(pyra, button_event->data1 - 1);
 509                         break;
 510                 case PYRA_MOUSE_EVENT_BUTTON_TYPE_CPI:
 511                         pyra->actual_cpi = button_event->data1;
 512                         break;
 513                 }
 514                 break;
 515         }
 516 }
 517
 518 static void pyra_report_to_chrdev(struct pyra_device const *pyra,
 519                 u8 const *data)
 520 {
 521         struct pyra_roccat_report roccat_report;
 522         struct pyra_mouse_event_button const *button_event;
 523
 524         if (data[0] != PYRA_MOUSE_REPORT_NUMBER_BUTTON)
 525                 return;
 526
 527         button_event = (struct pyra_mouse_event_button const *)data;
 528
 529         switch (button_event->type) {
 530         case PYRA_MOUSE_EVENT_BUTTON_TYPE_PROFILE_2:
 531         case PYRA_MOUSE_EVENT_BUTTON_TYPE_CPI:
 532                 roccat_report.type = button_event->type;
 533                 roccat_report.value = button_event->data1;
 534                 roccat_report.key = 0;
 535                 roccat_report_event(pyra->chrdev_minor,
 536                                 (uint8_t const *)&roccat_report);
 537                 break;
 538         case PYRA_MOUSE_EVENT_BUTTON_TYPE_MACRO:
 539         case PYRA_MOUSE_EVENT_BUTTON_TYPE_SHORTCUT:
 540         case PYRA_MOUSE_EVENT_BUTTON_TYPE_QUICKLAUNCH:
 541                 if (button_event->data2 == PYRA_MOUSE_EVENT_BUTTON_PRESS) {
 542                         roccat_report.type = button_event->type;
 543                         roccat_report.key = button_event->data1;
 544                         /*
 545                          * pyra reports profile numbers with range 1-5.
 546                          * Keeping this behaviour.
 547                          */
 548                         roccat_report.value = pyra->actual_profile + 1;
 549                         roccat_report_event(pyra->chrdev_minor,
 550                                         (uint8_t const *)&roccat_report);
 551                 }
 552                 break;
 553         }
 554 }
 555
 556 static int pyra_raw_event(struct hid_device *hdev, struct hid_report *report,
 557                 u8 *data, int size)
 558 {
 559         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 560         struct pyra_device *pyra = hid_get_drvdata(hdev);
 561
 562         if (intf->cur_altsetting->desc.bInterfaceProtocol
 563                         != USB_INTERFACE_PROTOCOL_MOUSE)
 564                 return 0;
 565
 566         if (pyra == NULL)
 567                 return 0;
 568
 569         pyra_keep_values_up_to_date(pyra, data);
 570
 571         if (pyra->roccat_claimed)
 572                 pyra_report_to_chrdev(pyra, data);
 573
 574         return 0;
 575 }
 576
 577 static const struct hid_device_id pyra_devices[] = {
 578         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT,
 579                         USB_DEVICE_ID_ROCCAT_PYRA_WIRED) },
 580         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT,
 581                         USB_DEVICE_ID_ROCCAT_PYRA_WIRELESS) },
 582         { }
 583 };
 584
 585 MODULE_DEVICE_TABLE(hid, pyra_devices);
 586
 587 static struct hid_driver pyra_driver = {
 588                 .name = "pyra",
 589                 .id_table = pyra_devices,
 590                 .probe = pyra_probe,
 591                 .remove = pyra_remove,
 592                 .raw_event = pyra_raw_event
 593 };
 594
 595 static int __init pyra_init(void)
 596 {
 597         int retval;
 598
 599         /* class name has to be same as driver name */
 600         pyra_class = class_create(THIS_MODULE, "pyra");
 601         if (IS_ERR(pyra_class))
 602                 return PTR_ERR(pyra_class);
 603         pyra_class->dev_attrs = pyra_attributes;
 604         pyra_class->dev_bin_attrs = pyra_bin_attributes;
 605
 606         retval = hid_register_driver(&pyra_driver);
 607         if (retval)
 608                 class_destroy(pyra_class);
 609         return retval;
 610 }
 611
 612 static void __exit pyra_exit(void)
 613 {
 614         hid_unregister_driver(&pyra_driver);
 615         class_destroy(pyra_class);
 616 }
 617
 618 module_init(pyra_init);
 619 module_exit(pyra_exit);
 620
 621 MODULE_AUTHOR("Stefan Achatz");
 622 MODULE_DESCRIPTION("USB Roccat Pyra driver");
 623 MODULE_LICENSE("GPL v2");