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Linux/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 module_hid_driver(ks_driver);
 51 
 52 MODULE_LICENSE("GPL");
 53 

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