1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *  HID driver for some belkin "special" devices
4 *
5 *  Copyright (c) 1999 Andreas Gal
6 *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
7 *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
8 *  Copyright (c) 2006-2007 Jiri Kosina
9 *  Copyright (c) 2008 Jiri Slaby
10 */
11
12/*
13 */
14
15#include <linux/device.h>
16#include <linux/hid.h>
17#include <linux/module.h>
18
19#include "hid-ids.h"
20
21#define BELKIN_HIDDEV	0x01
22#define BELKIN_WKBD	0x02
23
24#define belkin_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, max, \
25					EV_KEY, (c))
26static int belkin_input_mapping(struct hid_device *hdev, struct hid_input *hi,
27		struct hid_field *field, struct hid_usage *usage,
28		unsigned long **bit, int *max)
29{
30	unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
31
32	if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER ||
33			!(quirks & BELKIN_WKBD))
34		return 0;
35
36	switch (usage->hid & HID_USAGE) {
37	case 0x03a: belkin_map_key_clear(KEY_SOUND);		break;
38	case 0x03b: belkin_map_key_clear(KEY_CAMERA);		break;
39	case 0x03c: belkin_map_key_clear(KEY_DOCUMENTS);	break;
40	default:
41		return 0;
42	}
43	return 1;
44}
45
46static int belkin_probe(struct hid_device *hdev, const struct hid_device_id *id)
47{
48	unsigned long quirks = id->driver_data;
49	int ret;
50
51	hid_set_drvdata(hdev, (void *)quirks);
52
53	ret = hid_parse(hdev);
54	if (ret) {
55		hid_err(hdev, "parse failed\n");
56		goto err_free;
57	}
58
59	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT |
60		((quirks & BELKIN_HIDDEV) ? HID_CONNECT_HIDDEV_FORCE : 0));
61	if (ret) {
62		hid_err(hdev, "hw start failed\n");
63		goto err_free;
64	}
65
66	return 0;
67err_free:
68	return ret;
69}
70
71static const struct hid_device_id belkin_devices[] = {
72	{ HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM),
73		.driver_data = BELKIN_HIDDEV },
74	{ HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD),
75		.driver_data = BELKIN_WKBD },
76	{ }
77};
78MODULE_DEVICE_TABLE(hid, belkin_devices);
79
80static struct hid_driver belkin_driver = {
81	.name = "belkin",
82	.id_table = belkin_devices,
83	.input_mapping = belkin_input_mapping,
84	.probe = belkin_probe,
85};
86module_hid_driver(belkin_driver);
87
88MODULE_LICENSE("GPL");
89