// SPDX-License-Identifier: GPL-2.0-or-later

  /*
   *  HID driver for Kensigton Slimblade Trackball
   *
   *  Copyright (c) 2009 Jiri Kosina
   */
  
  /*

   */
  
  #include <linux/device.h>
  #include <linux/input.h>
  #include <linux/hid.h>
  #include <linux/module.h>
  
  #include "hid-ids.h"
  
  #define ks_map_key(c)	hid_map_usage(hi, usage, bit, max, EV_KEY, (c))
  
  static int ks_input_mapping(struct hid_device *hdev, struct hid_input *hi,
  		struct hid_field *field, struct hid_usage *usage,
  		unsigned long **bit, int *max)
  {
  	if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)
  		return 0;
  
  	switch (usage->hid & HID_USAGE) {
  	case 0x01: ks_map_key(BTN_MIDDLE);	break;
  	case 0x02: ks_map_key(BTN_SIDE);	break;
  	default:
  		return 0;
  	}
  	return 1;
  }
  
  static const struct hid_device_id ks_devices[] = {
  	{ HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
  	{ }
  };
  MODULE_DEVICE_TABLE(hid, ks_devices);
  
  static struct hid_driver ks_driver = {
  	.name = "kensington",
  	.id_table = ks_devices,
  	.input_mapping = ks_input_mapping,
  };

  module_hid_driver(ks_driver);

  MODULE_LICENSE("GPL");