LXR 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
  23static 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
  39static const struct hid_device_id ks_devices[] = {
  40        { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
  41        { }
  42};
  43MODULE_DEVICE_TABLE(hid, ks_devices);
  44
  45static struct hid_driver ks_driver = {
  46        .name = "kensington",
  47        .id_table = ks_devices,
  48        .input_mapping = ks_input_mapping,
  49};
  50module_hid_driver(ks_driver);
  51
  52MODULE_LICENSE("GPL");
  53