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