1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * HID driver for some cherry "special" devices
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (c) 1999 Andreas Gal
6*4882a593Smuzhiyun * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
7*4882a593Smuzhiyun * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
8*4882a593Smuzhiyun * Copyright (c) 2006-2007 Jiri Kosina
9*4882a593Smuzhiyun * Copyright (c) 2008 Jiri Slaby
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun /*
13*4882a593Smuzhiyun */
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include <linux/device.h>
16*4882a593Smuzhiyun #include <linux/hid.h>
17*4882a593Smuzhiyun #include <linux/module.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #include "hid-ids.h"
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun /*
22*4882a593Smuzhiyun * Cherry Cymotion keyboard have an invalid HID report descriptor,
23*4882a593Smuzhiyun * that needs fixing before we can parse it.
24*4882a593Smuzhiyun */
ch_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * rsize)25*4882a593Smuzhiyun static __u8 *ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
26*4882a593Smuzhiyun unsigned int *rsize)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun if (*rsize >= 18 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
29*4882a593Smuzhiyun hid_info(hdev, "fixing up Cherry Cymotion report descriptor\n");
30*4882a593Smuzhiyun rdesc[11] = rdesc[16] = 0xff;
31*4882a593Smuzhiyun rdesc[12] = rdesc[17] = 0x03;
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun return rdesc;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun #define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
37*4882a593Smuzhiyun EV_KEY, (c))
ch_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)38*4882a593Smuzhiyun static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
39*4882a593Smuzhiyun struct hid_field *field, struct hid_usage *usage,
40*4882a593Smuzhiyun unsigned long **bit, int *max)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
43*4882a593Smuzhiyun return 0;
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun switch (usage->hid & HID_USAGE) {
46*4882a593Smuzhiyun case 0x301: ch_map_key_clear(KEY_PROG1); break;
47*4882a593Smuzhiyun case 0x302: ch_map_key_clear(KEY_PROG2); break;
48*4882a593Smuzhiyun case 0x303: ch_map_key_clear(KEY_PROG3); break;
49*4882a593Smuzhiyun default:
50*4882a593Smuzhiyun return 0;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun return 1;
54*4882a593Smuzhiyun }
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun static const struct hid_device_id ch_devices[] = {
57*4882a593Smuzhiyun { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
58*4882a593Smuzhiyun { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },
59*4882a593Smuzhiyun { }
60*4882a593Smuzhiyun };
61*4882a593Smuzhiyun MODULE_DEVICE_TABLE(hid, ch_devices);
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun static struct hid_driver ch_driver = {
64*4882a593Smuzhiyun .name = "cherry",
65*4882a593Smuzhiyun .id_table = ch_devices,
66*4882a593Smuzhiyun .report_fixup = ch_report_fixup,
67*4882a593Smuzhiyun .input_mapping = ch_input_mapping,
68*4882a593Smuzhiyun };
69*4882a593Smuzhiyun module_hid_driver(ch_driver);
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun MODULE_LICENSE("GPL");
72