1/*
 2 *  HID driver for some cherry "special" devices
 3 *
 4 *  Copyright (c) 1999 Andreas Gal
 5 *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
 6 *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
 7 *  Copyright (c) 2006-2007 Jiri Kosina
 8 *  Copyright (c) 2008 Jiri Slaby
 9 */
10
11/*
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the Free
14 * Software Foundation; either version 2 of the License, or (at your option)
15 * any later version.
16 */
17
18#include <linux/device.h>
19#include <linux/hid.h>
20#include <linux/module.h>
21
22#include "hid-ids.h"
23
24/*
25 * Cherry Cymotion keyboard have an invalid HID report descriptor,
26 * that needs fixing before we can parse it.
27 */
28static __u8 *ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
29		unsigned int *rsize)
30{
31	if (*rsize >= 18 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
32		hid_info(hdev, "fixing up Cherry Cymotion report descriptor\n");
33		rdesc[11] = rdesc[16] = 0xff;
34		rdesc[12] = rdesc[17] = 0x03;
35	}
36	return rdesc;
37}
38
39#define ch_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, max, \
40					EV_KEY, (c))
41static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
42		struct hid_field *field, struct hid_usage *usage,
43		unsigned long **bit, int *max)
44{
45	if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
46		return 0;
47
48	switch (usage->hid & HID_USAGE) {
49	case 0x301: ch_map_key_clear(KEY_PROG1);	break;
50	case 0x302: ch_map_key_clear(KEY_PROG2);	break;
51	case 0x303: ch_map_key_clear(KEY_PROG3);	break;
52	default:
53		return 0;
54	}
55
56	return 1;
57}
58
59static const struct hid_device_id ch_devices[] = {
60	{ HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
61	{ HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },
62	{ }
63};
64MODULE_DEVICE_TABLE(hid, ch_devices);
65
66static struct hid_driver ch_driver = {
67	.name = "cherry",
68	.id_table = ch_devices,
69	.report_fixup = ch_report_fixup,
70	.input_mapping = ch_input_mapping,
71};
72module_hid_driver(ch_driver);
73
74MODULE_LICENSE("GPL");

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 *  HID driver for some cherry "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/*
22 * Cherry Cymotion keyboard have an invalid HID report descriptor,
23 * that needs fixing before we can parse it.
24 */
25static __u8 *ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
26		unsigned int *rsize)
27{
28	if (*rsize >= 18 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
29		hid_info(hdev, "fixing up Cherry Cymotion report descriptor\n");
30		rdesc[11] = rdesc[16] = 0xff;
31		rdesc[12] = rdesc[17] = 0x03;
32	}
33	return rdesc;
34}
35
36#define ch_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, max, \
37					EV_KEY, (c))
38static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
39		struct hid_field *field, struct hid_usage *usage,
40		unsigned long **bit, int *max)
41{
42	if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
43		return 0;
44
45	switch (usage->hid & HID_USAGE) {
46	case 0x301: ch_map_key_clear(KEY_PROG1);	break;
47	case 0x302: ch_map_key_clear(KEY_PROG2);	break;
48	case 0x303: ch_map_key_clear(KEY_PROG3);	break;
49	default:
50		return 0;
51	}
52
53	return 1;
54}
55
56static const struct hid_device_id ch_devices[] = {
57	{ HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
58	{ HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },
59	{ }
60};
61MODULE_DEVICE_TABLE(hid, ch_devices);
62
63static struct hid_driver ch_driver = {
64	.name = "cherry",
65	.id_table = ch_devices,
66	.report_fixup = ch_report_fixup,
67	.input_mapping = ch_input_mapping,
68};
69module_hid_driver(ch_driver);
70
71MODULE_LICENSE("GPL");