1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * HID driver for some sunplus "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
21static const __u8 *sp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
22 unsigned int *rsize)
23{
24 if (*rsize >= 112 && rdesc[104] == 0x26 && rdesc[105] == 0x80 &&
25 rdesc[106] == 0x03) {
26 hid_info(hdev, "fixing up Sunplus Wireless Desktop report descriptor\n");
27 rdesc[105] = rdesc[110] = 0x03;
28 rdesc[106] = rdesc[111] = 0x21;
29 }
30 return rdesc;
31}
32
33#define sp_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
34 EV_KEY, (c))
35static int sp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
36 struct hid_field *field, struct hid_usage *usage,
37 unsigned long **bit, int *max)
38{
39 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
40 return 0;
41
42 switch (usage->hid & HID_USAGE) {
43 case 0x2003: sp_map_key_clear(KEY_ZOOMIN); break;
44 case 0x2103: sp_map_key_clear(KEY_ZOOMOUT); break;
45 default:
46 return 0;
47 }
48 return 1;
49}
50
51static const struct hid_device_id sp_devices[] = {
52 { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
53 { }
54};
55MODULE_DEVICE_TABLE(hid, sp_devices);
56
57static struct hid_driver sp_driver = {
58 .name = "sunplus",
59 .id_table = sp_devices,
60 .report_fixup = sp_report_fixup,
61 .input_mapping = sp_input_mapping,
62};
63module_hid_driver(sp_driver);
64
65MODULE_DESCRIPTION("HID driver for some sunplus \"special\" devices");
66MODULE_LICENSE("GPL");
67