xref: /openbmc/linux/drivers/hid/hid-kensington.c (revision 2874c5fd)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  HID driver for Kensigton Slimblade Trackball
4  *
5  *  Copyright (c) 2009 Jiri Kosina
6  */
7 
8 /*
9  */
10 
11 #include <linux/device.h>
12 #include <linux/input.h>
13 #include <linux/hid.h>
14 #include <linux/module.h>
15 
16 #include "hid-ids.h"
17 
18 #define ks_map_key(c)	hid_map_usage(hi, usage, bit, max, EV_KEY, (c))
19 
ks_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)20 static int ks_input_mapping(struct hid_device *hdev, struct hid_input *hi,
21 		struct hid_field *field, struct hid_usage *usage,
22 		unsigned long **bit, int *max)
23 {
24 	if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)
25 		return 0;
26 
27 	switch (usage->hid & HID_USAGE) {
28 	case 0x01: ks_map_key(BTN_MIDDLE);	break;
29 	case 0x02: ks_map_key(BTN_SIDE);	break;
30 	default:
31 		return 0;
32 	}
33 	return 1;
34 }
35 
36 static const struct hid_device_id ks_devices[] = {
37 	{ HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
38 	{ }
39 };
40 MODULE_DEVICE_TABLE(hid, ks_devices);
41 
42 static struct hid_driver ks_driver = {
43 	.name = "kensington",
44 	.id_table = ks_devices,
45 	.input_mapping = ks_input_mapping,
46 };
47 module_hid_driver(ks_driver);
48 
49 MODULE_LICENSE("GPL");
50