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;
 152
 153         data = kmalloc(8, GFP_KERNEL);
 154         if (!data)
 155                 return -ENOMEM;
 156
 157         ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
 158                               K90_REQUEST_STATUS,
 159                               USB_DIR_IN | USB_TYPE_VENDOR |
 160                               USB_RECIP_DEVICE, 0, 0, data, 8,
 161                               USB_CTRL_SET_TIMEOUT);
 162         if (ret < 5) {
 163                 dev_warn(dev, "Failed to get K90 initial state (error %d).\n",
 164                          ret);
 165                 ret = -EIO;
 166                 goto out;
 167         }
 168         brightness = data[4];
 169         if (brightness < 0 || brightness > 3) {
 170                 dev_warn(dev,
 171                          "Read invalid backlight brightness: %02hhx.\n",
 172                          data[4]);
 173                 ret = -EIO;
 174                 goto out;
 175         }
 176         ret = brightness;
 177 out:
 178         kfree(data);
 179
 180         return ret;
 181 }
 182
 183 static enum led_brightness k90_record_led_get(struct led_classdev *led_cdev)
 184 {
 185         struct k90_led *led = container_of(led_cdev, struct k90_led, cdev);
 186
 187         return led->brightness;
 188 }
 189
 190 static void k90_brightness_set(struct led_classdev *led_cdev,
 191                                enum led_brightness brightness)
 192 {
 193         struct k90_led *led = container_of(led_cdev, struct k90_led, cdev);
 194
 195         led->brightness = brightness;
 196         schedule_work(&led->work);
 197 }
 198
 199 static void k90_backlight_work(struct work_struct *work)
 200 {
 201         int ret;
 202         struct k90_led *led = container_of(work, struct k90_led, work);
 203         struct device *dev;
 204         struct usb_interface *usbif;
 205         struct usb_device *usbdev;
 206
 207         if (led->removed)
 208                 return;
 209
 210         dev = led->cdev.dev->parent;
 211         usbif = to_usb_interface(dev->parent);
 212         usbdev = interface_to_usbdev(usbif);
 213
 214         ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
 215                               K90_REQUEST_BRIGHTNESS,
 216                               USB_DIR_OUT | USB_TYPE_VENDOR |
 217                               USB_RECIP_DEVICE, led->brightness, 0,
 218                               NULL, 0, USB_CTRL_SET_TIMEOUT);
 219         if (ret != 0)
 220                 dev_warn(dev, "Failed to set backlight brightness (error: %d).\n",
 221                          ret);
 222 }
 223
 224 static void k90_record_led_work(struct work_struct *work)
 225 {
 226         int ret;
 227         struct k90_led *led = container_of(work, struct k90_led, work);
 228         struct device *dev;
 229         struct usb_interface *usbif;
 230         struct usb_device *usbdev;
 231         int value;
 232
 233         if (led->removed)
 234                 return;
 235
 236         dev = led->cdev.dev->parent;
 237         usbif = to_usb_interface(dev->parent);
 238         usbdev = interface_to_usbdev(usbif);
 239
 240         if (led->brightness > 0)
 241                 value = K90_MACRO_LED_ON;
 242         else
 243                 value = K90_MACRO_LED_OFF;
 244
 245         ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
 246                               K90_REQUEST_MACRO_MODE,
 247                               USB_DIR_OUT | USB_TYPE_VENDOR |
 248                               USB_RECIP_DEVICE, value, 0, NULL, 0,
 249                               USB_CTRL_SET_TIMEOUT);
 250         if (ret != 0)
 251                 dev_warn(dev, "Failed to set record LED state (error: %d).\n",
 252                          ret);
 253 }
 254
 255 /*
 256  * Keyboard attributes
 257  */
 258
 259 static ssize_t k90_show_macro_mode(struct device *dev,
 260                                    struct device_attribute *attr, char *buf)
 261 {
 262         int ret;
 263         struct usb_interface *usbif = to_usb_interface(dev->parent);
 264         struct usb_device *usbdev = interface_to_usbdev(usbif);
 265         const char *macro_mode;
 266         char *data;
 267
 268         data = kmalloc(2, GFP_KERNEL);
 269         if (!data)
 270                 return -ENOMEM;
 271
 272         ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
 273                               K90_REQUEST_GET_MODE,
 274                               USB_DIR_IN | USB_TYPE_VENDOR |
 275                               USB_RECIP_DEVICE, 0, 0, data, 2,
 276                               USB_CTRL_SET_TIMEOUT);
 277         if (ret < 1) {
 278                 dev_warn(dev, "Failed to get K90 initial mode (error %d).\n",
 279                          ret);
 280                 ret = -EIO;
 281                 goto out;
 282         }
 283
 284         switch (data[0]) {
 285         case K90_MACRO_MODE_HW:
 286                 macro_mode = "HW";
 287                 break;
 288
 289         case K90_MACRO_MODE_SW:
 290                 macro_mode = "SW";
 291                 break;
 292         default:
 293                 dev_warn(dev, "K90 in unknown mode: %02hhx.\n",
 294                          data[0]);
 295                 ret = -EIO;
 296                 goto out;
 297         }
 298
 299         ret = snprintf(buf, PAGE_SIZE, "%s\n", macro_mode);
 300 out:
 301         kfree(data);
 302
 303         return ret;
 304 }
 305
 306 static ssize_t k90_store_macro_mode(struct device *dev,
 307                                     struct device_attribute *attr,
 308                                     const char *buf, size_t count)
 309 {
 310         int ret;
 311         struct usb_interface *usbif = to_usb_interface(dev->parent);
 312         struct usb_device *usbdev = interface_to_usbdev(usbif);
 313         __u16 value;
 314
 315         if (strncmp(buf, "SW", 2) == 0)
 316                 value = K90_MACRO_MODE_SW;
 317         else if (strncmp(buf, "HW", 2) == 0)
 318                 value = K90_MACRO_MODE_HW;
 319         else
 320                 return -EINVAL;
 321
 322         ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
 323                               K90_REQUEST_MACRO_MODE,
 324                               USB_DIR_OUT | USB_TYPE_VENDOR |
 325                               USB_RECIP_DEVICE, value, 0, NULL, 0,
 326                               USB_CTRL_SET_TIMEOUT);
 327         if (ret != 0) {
 328                 dev_warn(dev, "Failed to set macro mode.\n");
 329                 return ret;
 330         }
 331
 332         return count;
 333 }
 334
 335 static ssize_t k90_show_current_profile(struct device *dev,
 336                                         struct device_attribute *attr,
 337                                         char *buf)
 338 {
 339         int ret;
 340         struct usb_interface *usbif = to_usb_interface(dev->parent);
 341         struct usb_device *usbdev = interface_to_usbdev(usbif);
 342         int current_profile;
 343         char *data;
 344
 345         data = kmalloc(8, GFP_KERNEL);
 346         if (!data)
 347                 return -ENOMEM;
 348
 349         ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
 350                               K90_REQUEST_STATUS,
 351                               USB_DIR_IN | USB_TYPE_VENDOR |
 352                               USB_RECIP_DEVICE, 0, 0, data, 8,
 353                               USB_CTRL_SET_TIMEOUT);
 354         if (ret < 8) {
 355                 dev_warn(dev, "Failed to get K90 initial state (error %d).\n",
 356                          ret);
 357                 ret = -EIO;
 358                 goto out;
 359         }
 360         current_profile = data[7];
 361         if (current_profile < 1 || current_profile > 3) {
 362                 dev_warn(dev, "Read invalid current profile: %02hhx.\n",
 363                          data[7]);
 364                 ret = -EIO;
 365                 goto out;
 366         }
 367
 368         ret = snprintf(buf, PAGE_SIZE, "%d\n", current_profile);
 369 out:
 370         kfree(data);
 371
 372         return ret;
 373 }
 374
 375 static ssize_t k90_store_current_profile(struct device *dev,
 376                                          struct device_attribute *attr,
 377                                          const char *buf, size_t count)
 378 {
 379         int ret;
 380         struct usb_interface *usbif = to_usb_interface(dev->parent);
 381         struct usb_device *usbdev = interface_to_usbdev(usbif);
 382         int profile;
 383
 384         if (kstrtoint(buf, 10, &profile))
 385                 return -EINVAL;
 386         if (profile < 1 || profile > 3)
 387                 return -EINVAL;
 388
 389         ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
 390                               K90_REQUEST_PROFILE,
 391                               USB_DIR_OUT | USB_TYPE_VENDOR |
 392                               USB_RECIP_DEVICE, profile, 0, NULL, 0,
 393                               USB_CTRL_SET_TIMEOUT);
 394         if (ret != 0) {
 395                 dev_warn(dev, "Failed to change current profile (error %d).\n",
 396                          ret);
 397                 return ret;
 398         }
 399
 400         return count;
 401 }
 402
 403 static DEVICE_ATTR(macro_mode, 0644, k90_show_macro_mode, k90_store_macro_mode);
 404 static DEVICE_ATTR(current_profile, 0644, k90_show_current_profile,
 405                    k90_store_current_profile);
 406
 407 static struct attribute *k90_attrs[] = {
 408         &dev_attr_macro_mode.attr,
 409         &dev_attr_current_profile.attr,
 410         NULL
 411 };
 412
 413 static const struct attribute_group k90_attr_group = {
 414         .attrs = k90_attrs,
 415 };
 416
 417 /*
 418  * Driver functions
 419  */
 420
 421 static int k90_init_backlight(struct hid_device *dev)
 422 {
 423         int ret;
 424         struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
 425         size_t name_sz;
 426         char *name;
 427
 428         drvdata->backlight = kzalloc(sizeof(struct k90_led), GFP_KERNEL);
 429         if (!drvdata->backlight) {
 430                 ret = -ENOMEM;
 431                 goto fail_backlight_alloc;
 432         }
 433
 434         name_sz =
 435             strlen(dev_name(&dev->dev)) + sizeof(K90_BACKLIGHT_LED_SUFFIX);
 436         name = kzalloc(name_sz, GFP_KERNEL);
 437         if (!name) {
 438                 ret = -ENOMEM;
 439                 goto fail_name_alloc;
 440         }
 441         snprintf(name, name_sz, "%s" K90_BACKLIGHT_LED_SUFFIX,
 442                  dev_name(&dev->dev));
 443         drvdata->backlight->removed = false;
 444         drvdata->backlight->cdev.name = name;
 445         drvdata->backlight->cdev.max_brightness = 3;
 446         drvdata->backlight->cdev.brightness_set = k90_brightness_set;
 447         drvdata->backlight->cdev.brightness_get = k90_backlight_get;
 448         INIT_WORK(&drvdata->backlight->work, k90_backlight_work);
 449         ret = led_classdev_register(&dev->dev, &drvdata->backlight->cdev);
 450         if (ret != 0)
 451                 goto fail_register_cdev;
 452
 453         return 0;
 454
 455 fail_register_cdev:
 456         kfree(drvdata->backlight->cdev.name);
 457 fail_name_alloc:
 458         kfree(drvdata->backlight);
 459         drvdata->backlight = NULL;
 460 fail_backlight_alloc:
 461         return ret;
 462 }
 463
 464 static int k90_init_macro_functions(struct hid_device *dev)
 465 {
 466         int ret;
 467         struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
 468         struct k90_drvdata *k90;
 469         size_t name_sz;
 470         char *name;
 471
 472         k90 = kzalloc(sizeof(struct k90_drvdata), GFP_KERNEL);
 473         if (!k90) {
 474                 ret = -ENOMEM;
 475                 goto fail_drvdata;
 476         }
 477         drvdata->k90 = k90;
 478
 479         /* Init LED device for record LED */
 480         name_sz = strlen(dev_name(&dev->dev)) + sizeof(K90_RECORD_LED_SUFFIX);
 481         name = kzalloc(name_sz, GFP_KERNEL);
 482         if (!name) {
 483                 ret = -ENOMEM;
 484                 goto fail_record_led_alloc;
 485         }
 486         snprintf(name, name_sz, "%s" K90_RECORD_LED_SUFFIX,
 487                  dev_name(&dev->dev));
 488         k90->record_led.removed = false;
 489         k90->record_led.cdev.name = name;
 490         k90->record_led.cdev.max_brightness = 1;
 491         k90->record_led.cdev.brightness_set = k90_brightness_set;
 492         k90->record_led.cdev.brightness_get = k90_record_led_get;
 493         INIT_WORK(&k90->record_led.work, k90_record_led_work);
 494         k90->record_led.brightness = 0;
 495         ret = led_classdev_register(&dev->dev, &k90->record_led.cdev);
 496         if (ret != 0)
 497                 goto fail_record_led;
 498
 499         /* Init attributes */
 500         ret = sysfs_create_group(&dev->dev.kobj, &k90_attr_group);
 501         if (ret != 0)
 502                 goto fail_sysfs;
 503
 504         return 0;
 505
 506 fail_sysfs:
 507         k90->record_led.removed = true;
 508         led_classdev_unregister(&k90->record_led.cdev);
 509         cancel_work_sync(&k90->record_led.work);
 510 fail_record_led:
 511         kfree(k90->record_led.cdev.name);
 512 fail_record_led_alloc:
 513         kfree(k90);
 514 fail_drvdata:
 515         drvdata->k90 = NULL;
 516         return ret;
 517 }
 518
 519 static void k90_cleanup_backlight(struct hid_device *dev)
 520 {
 521         struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
 522
 523         if (drvdata->backlight) {
 524                 drvdata->backlight->removed = true;
 525                 led_classdev_unregister(&drvdata->backlight->cdev);
 526                 cancel_work_sync(&drvdata->backlight->work);
 527                 kfree(drvdata->backlight->cdev.name);
 528                 kfree(drvdata->backlight);
 529         }
 530 }
 531
 532 static void k90_cleanup_macro_functions(struct hid_device *dev)
 533 {
 534         struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
 535         struct k90_drvdata *k90 = drvdata->k90;
 536
 537         if (k90) {
 538                 sysfs_remove_group(&dev->dev.kobj, &k90_attr_group);
 539
 540                 k90->record_led.removed = true;
 541                 led_classdev_unregister(&k90->record_led.cdev);
 542                 cancel_work_sync(&k90->record_led.work);
 543                 kfree(k90->record_led.cdev.name);
 544
 545                 kfree(k90);
 546         }
 547 }
 548
 549 static int corsair_probe(struct hid_device *dev, const struct hid_device_id *id)
 550 {
 551         int ret;
 552         unsigned long quirks = id->driver_data;
 553         struct corsair_drvdata *drvdata;
 554         struct usb_interface *usbif = to_usb_interface(dev->dev.parent);
 555
 556         drvdata = devm_kzalloc(&dev->dev, sizeof(struct corsair_drvdata),
 557                                GFP_KERNEL);
 558         if (drvdata == NULL)
 559                 return -ENOMEM;
 560         drvdata->quirks = quirks;
 561         hid_set_drvdata(dev, drvdata);
 562
 563         ret = hid_parse(dev);
 564         if (ret != 0) {
 565                 hid_err(dev, "parse failed\n");
 566                 return ret;
 567         }
 568         ret = hid_hw_start(dev, HID_CONNECT_DEFAULT);
 569         if (ret != 0) {
 570                 hid_err(dev, "hw start failed\n");
 571                 return ret;
 572         }
 573
 574         if (usbif->cur_altsetting->desc.bInterfaceNumber == 0) {
 575                 if (quirks & CORSAIR_USE_K90_MACRO) {
 576                         ret = k90_init_macro_functions(dev);
 577                         if (ret != 0)
 578                                 hid_warn(dev, "Failed to initialize K90 macro functions.\n");
 579                 }
 580                 if (quirks & CORSAIR_USE_K90_BACKLIGHT) {
 581                         ret = k90_init_backlight(dev);
 582                         if (ret != 0)
 583                                 hid_warn(dev, "Failed to initialize K90 backlight.\n");
 584                 }
 585         }
 586
 587         return 0;
 588 }
 589
 590 static void corsair_remove(struct hid_device *dev)
 591 {
 592         k90_cleanup_macro_functions(dev);
 593         k90_cleanup_backlight(dev);
 594
 595         hid_hw_stop(dev);
 596 }
 597
 598 static int corsair_event(struct hid_device *dev, struct hid_field *field,
 599                          struct hid_usage *usage, __s32 value)
 600 {
 601         struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
 602
 603         if (!drvdata->k90)
 604                 return 0;
 605
 606         switch (usage->hid & HID_USAGE) {
 607         case CORSAIR_USAGE_MACRO_RECORD_START:
 608                 drvdata->k90->record_led.brightness = 1;
 609                 break;
 610         case CORSAIR_USAGE_MACRO_RECORD_STOP:
 611                 drvdata->k90->record_led.brightness = 0;
 612                 break;
 613         default:
 614                 break;
 615         }
 616
 617         return 0;
 618 }
 619
 620 static int corsair_input_mapping(struct hid_device *dev,
 621                                  struct hid_input *input,
 622                                  struct hid_field *field,
 623                                  struct hid_usage *usage, unsigned long **bit,
 624                                  int *max)
 625 {
 626         int gkey;
 627
 628         gkey = corsair_usage_to_gkey(usage->hid & HID_USAGE);
 629         if (gkey != 0) {
 630                 hid_map_usage_clear(input, usage, bit, max, EV_KEY,
 631                                     corsair_gkey_map[gkey - 1]);
 632                 return 1;
 633         }
 634         if ((usage->hid & HID_USAGE) >= CORSAIR_USAGE_SPECIAL_MIN &&
 635             (usage->hid & HID_USAGE) <= CORSAIR_USAGE_SPECIAL_MAX) {
 636                 switch (usage->hid & HID_USAGE) {
 637                 case CORSAIR_USAGE_MACRO_RECORD_START:
 638                         hid_map_usage_clear(input, usage, bit, max, EV_KEY,
 639                                             corsair_record_keycodes[0]);
 640                         return 1;
 641
 642                 case CORSAIR_USAGE_MACRO_RECORD_STOP:
 643                         hid_map_usage_clear(input, usage, bit, max, EV_KEY,
 644                                             corsair_record_keycodes[1]);
 645                         return 1;
 646
 647                 case CORSAIR_USAGE_M1:
 648                         hid_map_usage_clear(input, usage, bit, max, EV_KEY,
 649                                             corsair_profile_keycodes[0]);
 650                         return 1;
 651
 652                 case CORSAIR_USAGE_M2:
 653                         hid_map_usage_clear(input, usage, bit, max, EV_KEY,
 654                                             corsair_profile_keycodes[1]);
 655                         return 1;
 656
 657                 case CORSAIR_USAGE_M3:
 658                         hid_map_usage_clear(input, usage, bit, max, EV_KEY,
 659                                             corsair_profile_keycodes[2]);
 660                         return 1;
 661
 662                 default:
 663                         return -1;
 664                 }
 665         }
 666
 667         return 0;
 668 }
 669
 670 static const struct hid_device_id corsair_devices[] = {
 671         { HID_USB_DEVICE(USB_VENDOR_ID_CORSAIR, USB_DEVICE_ID_CORSAIR_K90),
 672                 .driver_data = CORSAIR_USE_K90_MACRO |
 673                                CORSAIR_USE_K90_BACKLIGHT },
 674         {}
 675 };
 676
 677 MODULE_DEVICE_TABLE(hid, corsair_devices);
 678
 679 static struct hid_driver corsair_driver = {
 680         .name = "corsair",
 681         .id_table = corsair_devices,
 682         .probe = corsair_probe,
 683         .event = corsair_event,
 684         .remove = corsair_remove,
 685         .input_mapping = corsair_input_mapping,
 686 };
 687
 688 static int __init corsair_init(void)
 689 {
 690         return hid_register_driver(&corsair_driver);
 691 }
 692
 693 static void corsair_exit(void)
 694 {
 695         hid_unregister_driver(&corsair_driver);
 696 }
 697
 698 module_init(corsair_init);
 699 module_exit(corsair_exit);
 700
 701 MODULE_LICENSE("GPL");
 702 MODULE_AUTHOR("Clement Vuchener");
 703 MODULE_DESCRIPTION("HID driver for Corsair devices");