kernel/drivers/hid/hid-corsair.c

   1 /*
   2  * HID driver for Corsair devices
   3  *
   4  * Supported devices:
   5  *  - Vengeance K90 Keyboard
   6  *
   7  * Copyright (c) 2015 Clement Vuchener
   8  */
   9
  10 /*
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License as published by the Free
  13  * Software Foundation; either version 2 of the License, or (at your option)
  14  * any later version.
  15  */
  16
  17 #include <linux/hid.h>
  18 #include <linux/module.h>
  19 #include <linux/usb.h>
  20 #include <linux/leds.h>
  21
  22 #include "hid-ids.h"
  23
  24 #define CORSAIR_USE_K90_MACRO   (1<<0)
  25 #define CORSAIR_USE_K90_BACKLIGHT       (1<<1)
  26
  27 struct k90_led {
  28         struct led_classdev cdev;
  29         int brightness;
  30         struct work_struct work;
  31         bool removed;
  32 };
  33
  34 struct k90_drvdata {
  35         struct k90_led record_led;
  36 };
  37
  38 struct corsair_drvdata {
  39         unsigned long quirks;
  40         struct k90_drvdata *k90;
  41         struct k90_led *backlight;
  42 };
  43
  44 #define K90_GKEY_COUNT  18
  45
  46 static int corsair_usage_to_gkey(unsigned int usage)
  47 {
  48         /* G1 (0xd0) to G16 (0xdf) */
  49         if (usage >= 0xd0 && usage <= 0xdf)
  50                 return usage - 0xd0 + 1;
  51         /* G17 (0xe8) to G18 (0xe9) */
  52         if (usage >= 0xe8 && usage <= 0xe9)
  53                 return usage - 0xe8 + 17;
  54         return 0;
  55 }
  56
  57 static unsigned short corsair_gkey_map[K90_GKEY_COUNT] = {
  58         BTN_TRIGGER_HAPPY1,
  59         BTN_TRIGGER_HAPPY2,
  60         BTN_TRIGGER_HAPPY3,
  61         BTN_TRIGGER_HAPPY4,
  62         BTN_TRIGGER_HAPPY5,
  63         BTN_TRIGGER_HAPPY6,
  64         BTN_TRIGGER_HAPPY7,
  65         BTN_TRIGGER_HAPPY8,
  66         BTN_TRIGGER_HAPPY9,
  67         BTN_TRIGGER_HAPPY10,
  68         BTN_TRIGGER_HAPPY11,
  69         BTN_TRIGGER_HAPPY12,
  70         BTN_TRIGGER_HAPPY13,
  71         BTN_TRIGGER_HAPPY14,
  72         BTN_TRIGGER_HAPPY15,
  73         BTN_TRIGGER_HAPPY16,
  74         BTN_TRIGGER_HAPPY17,
  75         BTN_TRIGGER_HAPPY18,
  76 };
  77
  78 module_param_array_named(gkey_codes, corsair_gkey_map, ushort, NULL, S_IRUGO);
  79 MODULE_PARM_DESC(gkey_codes, "Key codes for the G-keys");
  80
  81 static unsigned short corsair_record_keycodes[2] = {
  82         BTN_TRIGGER_HAPPY19,
  83         BTN_TRIGGER_HAPPY20
  84 };
  85
  86 module_param_array_named(recordkey_codes, corsair_record_keycodes, ushort,
  87                          NULL, S_IRUGO);
  88 MODULE_PARM_DESC(recordkey_codes, "Key codes for the MR (start and stop record) button");
  89
  90 static unsigned short corsair_profile_keycodes[3] = {
  91         BTN_TRIGGER_HAPPY21,
  92         BTN_TRIGGER_HAPPY22,
  93         BTN_TRIGGER_HAPPY23
  94 };
  95
  96 module_param_array_named(profilekey_codes, corsair_profile_keycodes, ushort,
  97                          NULL, S_IRUGO);
  98 MODULE_PARM_DESC(profilekey_codes, "Key codes for the profile buttons");
  99
 100 #define CORSAIR_USAGE_SPECIAL_MIN 0xf0
 101 #define CORSAIR_USAGE_SPECIAL_MAX 0xff
 102
 103 #define CORSAIR_USAGE_MACRO_RECORD_START 0xf6
 104 #define CORSAIR_USAGE_MACRO_RECORD_STOP 0xf7
 105
 106 #define CORSAIR_USAGE_PROFILE 0xf1
 107 #define CORSAIR_USAGE_M1 0xf1
 108 #define CORSAIR_USAGE_M2 0xf2
 109 #define CORSAIR_USAGE_M3 0xf3
 110 #define CORSAIR_USAGE_PROFILE_MAX 0xf3
 111
 112 #define CORSAIR_USAGE_META_OFF 0xf4
 113 #define CORSAIR_USAGE_META_ON  0xf5
 114
 115 #define CORSAIR_USAGE_LIGHT 0xfa
 116 #define CORSAIR_USAGE_LIGHT_OFF 0xfa
 117 #define CORSAIR_USAGE_LIGHT_DIM 0xfb
 118 #define CORSAIR_USAGE_LIGHT_MEDIUM 0xfc
 119 #define CORSAIR_USAGE_LIGHT_BRIGHT 0xfd
 120 #define CORSAIR_USAGE_LIGHT_MAX 0xfd
 121
 122 /* USB control protocol */
 123
 124 #define K90_REQUEST_BRIGHTNESS 49
 125 #define K90_REQUEST_MACRO_MODE 2
 126 #define K90_REQUEST_STATUS 4
 127 #define K90_REQUEST_GET_MODE 5
 128 #define K90_REQUEST_PROFILE 20
 129
 130 #define K90_MACRO_MODE_SW 0x0030
 131 #define K90_MACRO_MODE_HW 0x0001
 132
 133 #define K90_MACRO_LED_ON  0x0020
 134 #define K90_MACRO_LED_OFF 0x0040
 135
 136 /*
 137  * LED class devices
 138  */
 139
 140 #define K90_BACKLIGHT_LED_SUFFIX "::backlight"
 141 #define K90_RECORD_LED_SUFFIX "::record"
 142
 143 static enum led_brightness k90_backlight_get(struct led_classdev *led_cdev)
 144 {
 145         int ret;
 146         struct k90_led *led = container_of(led_cdev, struct k90_led, cdev);
 147         struct device *dev = led->cdev.dev->parent;
 148         struct usb_interface *usbif = to_usb_interface(dev->parent);
 149         struct usb_device *usbdev = interface_to_usbdev(usbif);
 150         int brightness;
 151         char data[8];
 152
 153         ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
 154                               K90_REQUEST_STATUS,
 155                               USB_DIR_IN | USB_TYPE_VENDOR |
 156                               USB_RECIP_DEVICE, 0, 0, data, 8,
 157                               USB_CTRL_SET_TIMEOUT);
 158         if (ret < 0) {
 159                 dev_warn(dev, "Failed to get K90 initial state (error %d).\n",
 160                          ret);
 161                 return -EIO;
 162         }
 163         brightness = data[4];
 164         if (brightness < 0 || brightness > 3) {
 165                 dev_warn(dev,
 166                          "Read invalid backlight brightness: %02hhx.\n",
 167                          data[4]);
 168                 return -EIO;
 169         }
 170         return brightness;
 171 }
 172
 173 static enum led_brightness k90_record_led_get(struct led_classdev *led_cdev)
 174 {
 175         struct k90_led *led = container_of(led_cdev, struct k90_led, cdev);
 176
 177         return led->brightness;
 178 }
 179
 180 static void k90_brightness_set(struct led_classdev *led_cdev,
 181                                enum led_brightness brightness)
 182 {
 183         struct k90_led *led = container_of(led_cdev, struct k90_led, cdev);
 184
 185         led->brightness = brightness;
 186         schedule_work(&led->work);
 187 }
 188
 189 static void k90_backlight_work(struct work_struct *work)
 190 {
 191         int ret;
 192         struct k90_led *led = container_of(work, struct k90_led, work);
 193         struct device *dev;
 194         struct usb_interface *usbif;
 195         struct usb_device *usbdev;
 196
 197         if (led->removed)
 198                 return;
 199
 200         dev = led->cdev.dev->parent;
 201         usbif = to_usb_interface(dev->parent);
 202         usbdev = interface_to_usbdev(usbif);
 203
 204         ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
 205                               K90_REQUEST_BRIGHTNESS,
 206                               USB_DIR_OUT | USB_TYPE_VENDOR |
 207                               USB_RECIP_DEVICE, led->brightness, 0,
 208                               NULL, 0, USB_CTRL_SET_TIMEOUT);
 209         if (ret != 0)
 210                 dev_warn(dev, "Failed to set backlight brightness (error: %d).\n",
 211                          ret);
 212 }
 213
 214 static void k90_record_led_work(struct work_struct *work)
 215 {
 216         int ret;
 217         struct k90_led *led = container_of(work, struct k90_led, work);
 218         struct device *dev;
 219         struct usb_interface *usbif;
 220         struct usb_device *usbdev;
 221         int value;
 222
 223         if (led->removed)
 224                 return;
 225
 226         dev = led->cdev.dev->parent;
 227         usbif = to_usb_interface(dev->parent);
 228         usbdev = interface_to_usbdev(usbif);
 229
 230         if (led->brightness > 0)
 231                 value = K90_MACRO_LED_ON;
 232         else
 233                 value = K90_MACRO_LED_OFF;
 234
 235         ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
 236                               K90_REQUEST_MACRO_MODE,
 237                               USB_DIR_OUT | USB_TYPE_VENDOR |
 238                               USB_RECIP_DEVICE, value, 0, NULL, 0,
 239                               USB_CTRL_SET_TIMEOUT);
 240         if (ret != 0)
 241                 dev_warn(dev, "Failed to set record LED state (error: %d).\n",
 242                          ret);
 243 }
 244
 245 /*
 246  * Keyboard attributes
 247  */
 248
 249 static ssize_t k90_show_macro_mode(struct device *dev,
 250                                    struct device_attribute *attr, char *buf)
 251 {
 252         int ret;
 253         struct usb_interface *usbif = to_usb_interface(dev->parent);
 254         struct usb_device *usbdev = interface_to_usbdev(usbif);
 255         const char *macro_mode;
 256         char data[8];
 257
 258         ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
 259                               K90_REQUEST_GET_MODE,
 260                               USB_DIR_IN | USB_TYPE_VENDOR |
 261                               USB_RECIP_DEVICE, 0, 0, data, 2,
 262                               USB_CTRL_SET_TIMEOUT);
 263         if (ret < 0) {
 264                 dev_warn(dev, "Failed to get K90 initial mode (error %d).\n",
 265                          ret);
 266                 return -EIO;
 267         }
 268
 269         switch (data[0]) {
 270         case K90_MACRO_MODE_HW:
 271                 macro_mode = "HW";
 272                 break;
 273
 274         case K90_MACRO_MODE_SW:
 275                 macro_mode = "SW";
 276                 break;
 277         default:
 278                 dev_warn(dev, "K90 in unknown mode: %02hhx.\n",
 279                          data[0]);
 280                 return -EIO;
 281         }
 282
 283         return snprintf(buf, PAGE_SIZE, "%s\n", macro_mode);
 284 }
 285
 286 static ssize_t k90_store_macro_mode(struct device *dev,
 287                                     struct device_attribute *attr,
 288                                     const char *buf, size_t count)
 289 {
 290         int ret;
 291         struct usb_interface *usbif = to_usb_interface(dev->parent);
 292         struct usb_device *usbdev = interface_to_usbdev(usbif);
 293         __u16 value;
 294
 295         if (strncmp(buf, "SW", 2) == 0)
 296                 value = K90_MACRO_MODE_SW;
 297         else if (strncmp(buf, "HW", 2) == 0)
 298                 value = K90_MACRO_MODE_HW;
 299         else
 300                 return -EINVAL;
 301
 302         ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
 303                               K90_REQUEST_MACRO_MODE,
 304                               USB_DIR_OUT | USB_TYPE_VENDOR |
 305                               USB_RECIP_DEVICE, value, 0, NULL, 0,
 306                               USB_CTRL_SET_TIMEOUT);
 307         if (ret != 0) {
 308                 dev_warn(dev, "Failed to set macro mode.\n");
 309                 return ret;
 310         }
 311
 312         return count;
 313 }
 314
 315 static ssize_t k90_show_current_profile(struct device *dev,
 316                                         struct device_attribute *attr,
 317                                         char *buf)
 318 {
 319         int ret;
 320         struct usb_interface *usbif = to_usb_interface(dev->parent);
 321         struct usb_device *usbdev = interface_to_usbdev(usbif);
 322         int current_profile;
 323         char data[8];
 324
 325         ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
 326                               K90_REQUEST_STATUS,
 327                               USB_DIR_IN | USB_TYPE_VENDOR |
 328                               USB_RECIP_DEVICE, 0, 0, data, 8,
 329                               USB_CTRL_SET_TIMEOUT);
 330         if (ret < 0) {
 331                 dev_warn(dev, "Failed to get K90 initial state (error %d).\n",
 332                          ret);
 333                 return -EIO;
 334         }
 335         current_profile = data[7];
 336         if (current_profile < 1 || current_profile > 3) {
 337                 dev_warn(dev, "Read invalid current profile: %02hhx.\n",
 338                          data[7]);
 339                 return -EIO;
 340         }
 341
 342         return snprintf(buf, PAGE_SIZE, "%d\n", current_profile);
 343 }
 344
 345 static ssize_t k90_store_current_profile(struct device *dev,
 346                                          struct device_attribute *attr,
 347                                          const char *buf, size_t count)
 348 {
 349         int ret;
 350         struct usb_interface *usbif = to_usb_interface(dev->parent);
 351         struct usb_device *usbdev = interface_to_usbdev(usbif);
 352         int profile;
 353
 354         if (kstrtoint(buf, 10, &profile))
 355                 return -EINVAL;
 356         if (profile < 1 || profile > 3)
 357                 return -EINVAL;
 358
 359         ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
 360                               K90_REQUEST_PROFILE,
 361                               USB_DIR_OUT | USB_TYPE_VENDOR |
 362                               USB_RECIP_DEVICE, profile, 0, NULL, 0,
 363                               USB_CTRL_SET_TIMEOUT);
 364         if (ret != 0) {
 365                 dev_warn(dev, "Failed to change current profile (error %d).\n",
 366                          ret);
 367                 return ret;
 368         }
 369
 370         return count;
 371 }
 372
 373 static DEVICE_ATTR(macro_mode, 0644, k90_show_macro_mode, k90_store_macro_mode);
 374 static DEVICE_ATTR(current_profile, 0644, k90_show_current_profile,
 375                    k90_store_current_profile);
 376
 377 static struct attribute *k90_attrs[] = {
 378         &dev_attr_macro_mode.attr,
 379         &dev_attr_current_profile.attr,
 380         NULL
 381 };
 382
 383 static const struct attribute_group k90_attr_group = {
 384         .attrs = k90_attrs,
 385 };
 386
 387 /*
 388  * Driver functions
 389  */
 390
 391 static int k90_init_backlight(struct hid_device *dev)
 392 {
 393         int ret;
 394         struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
 395         size_t name_sz;
 396         char *name;
 397
 398         drvdata->backlight = kzalloc(sizeof(struct k90_led), GFP_KERNEL);
 399         if (!drvdata->backlight) {
 400                 ret = -ENOMEM;
 401                 goto fail_backlight_alloc;
 402         }
 403
 404         name_sz =
 405             strlen(dev_name(&dev->dev)) + sizeof(K90_BACKLIGHT_LED_SUFFIX);
 406         name = kzalloc(name_sz, GFP_KERNEL);
 407         if (!name) {
 408                 ret = -ENOMEM;
 409                 goto fail_name_alloc;
 410         }
 411         snprintf(name, name_sz, "%s" K90_BACKLIGHT_LED_SUFFIX,
 412                  dev_name(&dev->dev));
 413         drvdata->backlight->removed = false;
 414         drvdata->backlight->cdev.name = name;
 415         drvdata->backlight->cdev.max_brightness = 3;
 416         drvdata->backlight->cdev.brightness_set = k90_brightness_set;
 417         drvdata->backlight->cdev.brightness_get = k90_backlight_get;
 418         INIT_WORK(&drvdata->backlight->work, k90_backlight_work);
 419         ret = led_classdev_register(&dev->dev, &drvdata->backlight->cdev);
 420         if (ret != 0)
 421                 goto fail_register_cdev;
 422
 423         return 0;
 424
 425 fail_register_cdev:
 426         kfree(drvdata->backlight->cdev.name);
 427 fail_name_alloc:
 428         kfree(drvdata->backlight);
 429         drvdata->backlight = NULL;
 430 fail_backlight_alloc:
 431         return ret;
 432 }
 433
 434 static int k90_init_macro_functions(struct hid_device *dev)
 435 {
 436         int ret;
 437         struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
 438         struct k90_drvdata *k90;
 439         size_t name_sz;
 440         char *name;
 441
 442         k90 = kzalloc(sizeof(struct k90_drvdata), GFP_KERNEL);
 443         if (!k90) {
 444                 ret = -ENOMEM;
 445                 goto fail_drvdata;
 446         }
 447         drvdata->k90 = k90;
 448
 449         /* Init LED device for record LED */
 450         name_sz = strlen(dev_name(&dev->dev)) + sizeof(K90_RECORD_LED_SUFFIX);
 451         name = kzalloc(name_sz, GFP_KERNEL);
 452         if (!name) {
 453                 ret = -ENOMEM;
 454                 goto fail_record_led_alloc;
 455         }
 456         snprintf(name, name_sz, "%s" K90_RECORD_LED_SUFFIX,
 457                  dev_name(&dev->dev));
 458         k90->record_led.removed = false;
 459         k90->record_led.cdev.name = name;
 460         k90->record_led.cdev.max_brightness = 1;
 461         k90->record_led.cdev.brightness_set = k90_brightness_set;
 462         k90->record_led.cdev.brightness_get = k90_record_led_get;
 463         INIT_WORK(&k90->record_led.work, k90_record_led_work);
 464         k90->record_led.brightness = 0;
 465         ret = led_classdev_register(&dev->dev, &k90->record_led.cdev);
 466         if (ret != 0)
 467                 goto fail_record_led;
 468
 469         /* Init attributes */
 470         ret = sysfs_create_group(&dev->dev.kobj, &k90_attr_group);
 471         if (ret != 0)
 472                 goto fail_sysfs;
 473
 474         return 0;
 475
 476 fail_sysfs:
 477         k90->record_led.removed = true;
 478         led_classdev_unregister(&k90->record_led.cdev);
 479         cancel_work_sync(&k90->record_led.work);
 480 fail_record_led:
 481         kfree(k90->record_led.cdev.name);
 482 fail_record_led_alloc:
 483         kfree(k90);
 484 fail_drvdata:
 485         drvdata->k90 = NULL;
 486         return ret;
 487 }
 488
 489 static void k90_cleanup_backlight(struct hid_device *dev)
 490 {
 491         struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
 492
 493         if (drvdata->backlight) {
 494                 drvdata->backlight->removed = true;
 495                 led_classdev_unregister(&drvdata->backlight->cdev);
 496                 cancel_work_sync(&drvdata->backlight->work);
 497                 kfree(drvdata->backlight->cdev.name);
 498                 kfree(drvdata->backlight);
 499         }
 500 }
 501
 502 static void k90_cleanup_macro_functions(struct hid_device *dev)
 503 {
 504         struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
 505         struct k90_drvdata *k90 = drvdata->k90;
 506
 507         if (k90) {
 508                 sysfs_remove_group(&dev->dev.kobj, &k90_attr_group);
 509
 510                 k90->record_led.removed = true;
 511                 led_classdev_unregister(&k90->record_led.cdev);
 512                 cancel_work_sync(&k90->record_led.work);
 513                 kfree(k90->record_led.cdev.name);
 514
 515                 kfree(k90);
 516         }
 517 }
 518
 519 static int corsair_probe(struct hid_device *dev, const struct hid_device_id *id)
 520 {
 521         int ret;
 522         unsigned long quirks = id->driver_data;
 523         struct corsair_drvdata *drvdata;
 524         struct usb_interface *usbif = to_usb_interface(dev->dev.parent);
 525
 526         drvdata = devm_kzalloc(&dev->dev, sizeof(struct corsair_drvdata),
 527                                GFP_KERNEL);
 528         if (drvdata == NULL)
 529                 return -ENOMEM;
 530         drvdata->quirks = quirks;
 531         hid_set_drvdata(dev, drvdata);
 532
 533         ret = hid_parse(dev);
 534         if (ret != 0) {
 535                 hid_err(dev, "parse failed\n");
 536                 return ret;
 537         }
 538         ret = hid_hw_start(dev, HID_CONNECT_DEFAULT);
 539         if (ret != 0) {
 540                 hid_err(dev, "hw start failed\n");
 541                 return ret;
 542         }
 543
 544         if (usbif->cur_altsetting->desc.bInterfaceNumber == 0) {
 545                 if (quirks & CORSAIR_USE_K90_MACRO) {
 546                         ret = k90_init_macro_functions(dev);
 547                         if (ret != 0)
 548                                 hid_warn(dev, "Failed to initialize K90 macro functions.\n");
 549                 }
 550                 if (quirks & CORSAIR_USE_K90_BACKLIGHT) {
 551                         ret = k90_init_backlight(dev);
 552                         if (ret != 0)
 553                                 hid_warn(dev, "Failed to initialize K90 backlight.\n");
 554                 }
 555         }
 556
 557         return 0;
 558 }
 559
 560 static void corsair_remove(struct hid_device *dev)
 561 {
 562         k90_cleanup_macro_functions(dev);
 563         k90_cleanup_backlight(dev);
 564
 565         hid_hw_stop(dev);
 566 }
 567
 568 static int corsair_event(struct hid_device *dev, struct hid_field *field,
 569                          struct hid_usage *usage, __s32 value)
 570 {
 571         struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
 572
 573         if (!drvdata->k90)
 574                 return 0;
 575
 576         switch (usage->hid & HID_USAGE) {
 577         case CORSAIR_USAGE_MACRO_RECORD_START:
 578                 drvdata->k90->record_led.brightness = 1;
 579                 break;
 580         case CORSAIR_USAGE_MACRO_RECORD_STOP:
 581                 drvdata->k90->record_led.brightness = 0;
 582                 break;
 583         default:
 584                 break;
 585         }
 586
 587         return 0;
 588 }
 589
 590 static int corsair_input_mapping(struct hid_device *dev,
 591                                  struct hid_input *input,
 592                                  struct hid_field *field,
 593                                  struct hid_usage *usage, unsigned long **bit,
 594                                  int *max)
 595 {
 596         int gkey;
 597
 598         gkey = corsair_usage_to_gkey(usage->hid & HID_USAGE);
 599         if (gkey != 0) {
 600                 hid_map_usage_clear(input, usage, bit, max, EV_KEY,
 601                                     corsair_gkey_map[gkey - 1]);
 602                 return 1;
 603         }
 604         if ((usage->hid & HID_USAGE) >= CORSAIR_USAGE_SPECIAL_MIN &&
 605             (usage->hid & HID_USAGE) <= CORSAIR_USAGE_SPECIAL_MAX) {
 606                 switch (usage->hid & HID_USAGE) {
 607                 case CORSAIR_USAGE_MACRO_RECORD_START:
 608                         hid_map_usage_clear(input, usage, bit, max, EV_KEY,
 609                                             corsair_record_keycodes[0]);
 610                         return 1;
 611
 612                 case CORSAIR_USAGE_MACRO_RECORD_STOP:
 613                         hid_map_usage_clear(input, usage, bit, max, EV_KEY,
 614                                             corsair_record_keycodes[1]);
 615                         return 1;
 616
 617                 case CORSAIR_USAGE_M1:
 618                         hid_map_usage_clear(input, usage, bit, max, EV_KEY,
 619                                             corsair_profile_keycodes[0]);
 620                         return 1;
 621
 622                 case CORSAIR_USAGE_M2:
 623                         hid_map_usage_clear(input, usage, bit, max, EV_KEY,
 624                                             corsair_profile_keycodes[1]);
 625                         return 1;
 626
 627                 case CORSAIR_USAGE_M3:
 628                         hid_map_usage_clear(input, usage, bit, max, EV_KEY,
 629                                             corsair_profile_keycodes[2]);
 630                         return 1;
 631
 632                 default:
 633                         return -1;
 634                 }
 635         }
 636
 637         return 0;
 638 }
 639
 640 static const struct hid_device_id corsair_devices[] = {
 641         { HID_USB_DEVICE(USB_VENDOR_ID_CORSAIR, USB_DEVICE_ID_CORSAIR_K90),
 642                 .driver_data = CORSAIR_USE_K90_MACRO |
 643                                CORSAIR_USE_K90_BACKLIGHT },
 644         {}
 645 };
 646
 647 MODULE_DEVICE_TABLE(hid, corsair_devices);
 648
 649 static struct hid_driver corsair_driver = {
 650         .name = "corsair",
 651         .id_table = corsair_devices,
 652         .probe = corsair_probe,
 653         .event = corsair_event,
 654         .remove = corsair_remove,
 655         .input_mapping = corsair_input_mapping,
 656 };
 657
 658 static int __init corsair_init(void)
 659 {
 660         return hid_register_driver(&corsair_driver);
 661 }
 662
 663 static void corsair_exit(void)
 664 {
 665         hid_unregister_driver(&corsair_driver);
 666 }
 667
 668 module_init(corsair_init);
 669 module_exit(corsair_exit);
 670
 671 MODULE_LICENSE("GPL");
 672 MODULE_AUTHOR("Clement Vuchener");
 673 MODULE_DESCRIPTION("HID driver for Corsair devices");