drivers/hid/hid-kensington.c

   1 /*
   2  *  HID driver for Kensigton Slimblade Trackball
   3  *
   4  *  Copyright (c) 2009 Jiri Kosina
   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 #include <linux/device.h>
  15 #include <linux/input.h>
  16 #include <linux/hid.h>
  17 #include <linux/module.h>
  18
  19 #include "hid-ids.h"
  20
  21 #define ks_map_key(c)   hid_map_usage(hi, usage, bit, max, EV_KEY, (c))
  22
  23 static int ks_input_mapping(struct hid_device *hdev, struct hid_input *hi,
  24                 struct hid_field *field, struct hid_usage *usage,
  25                 unsigned long **bit, int *max)
  26 {
  27         if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)
  28                 return 0;
  29
  30         switch (usage->hid & HID_USAGE) {
  31         case 0x01: ks_map_key(BTN_MIDDLE);      break;
  32         case 0x02: ks_map_key(BTN_SIDE);        break;
  33         default:
  34                 return 0;
  35         }
  36         return 1;
  37 }
  38
  39 static const struct hid_device_id ks_devices[] = {
  40         { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
  41         { }
  42 };
  43 MODULE_DEVICE_TABLE(hid, ks_devices);
  44
  45 static struct hid_driver ks_driver = {
  46         .name = "kensington",
  47         .id_table = ks_devices,
  48         .input_mapping = ks_input_mapping,
  49 };
  50
  51 static int __init ks_init(void)
  52 {
  53         return hid_register_driver(&ks_driver);
  54 }
  55
  56 static void __exit ks_exit(void)
  57 {
  58         hid_unregister_driver(&ks_driver);
  59 }
  60
  61 module_init(ks_init);
  62 module_exit(ks_exit);
  63 MODULE_LICENSE("GPL");