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
ks_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)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
ks_init(void)51 static int __init ks_init(void)
52 {
53 return hid_register_driver(&ks_driver);
54 }
55
ks_exit(void)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");
64