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 | */ |
25 | static __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)) |
38 | static 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 | |
56 | static 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 | }; |
61 | MODULE_DEVICE_TABLE(hid, ch_devices); |
62 | |
63 | static 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 | }; |
69 | module_hid_driver(ch_driver); |
70 | |
71 | MODULE_LICENSE("GPL" ); |
72 | |