blob: ab8209e7e45ca41fe691d97cd24bc8011db2179e [file] [log] [blame]
Jiri Slaby3b239cd2008-06-24 20:42:25 +02001/*
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) 2007 Paul Walmsley
9 * Copyright (c) 2008 Jiri Slaby
10 */
11
12/*
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the Free
15 * Software Foundation; either version 2 of the License, or (at your option)
16 * any later version.
17 */
18
19#include <linux/device.h>
20#include <linux/hid.h>
21#include <linux/module.h>
22
23#include "hid-ids.h"
24
25/*
26 * Cherry Cymotion keyboard have an invalid HID report descriptor,
27 * that needs fixing before we can parse it.
28 */
29static void ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
30 unsigned int rsize)
31{
32 if (rsize >= 17 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
33 dev_info(&hdev->dev, "fixing up Cherry Cymotion report "
34 "descriptor\n");
35 rdesc[11] = rdesc[16] = 0xff;
36 rdesc[12] = rdesc[17] = 0x03;
37 }
38}
39
40#define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
41 EV_KEY, (c))
42static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
43 struct hid_field *field, struct hid_usage *usage,
44 unsigned long **bit, int *max)
45{
46 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
47 return 0;
48
49 switch (usage->hid & HID_USAGE) {
50 case 0x301: ch_map_key_clear(KEY_PROG1); break;
51 case 0x302: ch_map_key_clear(KEY_PROG2); break;
52 case 0x303: ch_map_key_clear(KEY_PROG3); break;
53 default:
54 return 0;
55 }
56
57 return 1;
58}
59
60static const struct hid_device_id ch_devices[] = {
61 { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
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};
72
73static int ch_init(void)
74{
75 return hid_register_driver(&ch_driver);
76}
77
78static void ch_exit(void)
79{
80 hid_unregister_driver(&ch_driver);
81}
82
83module_init(ch_init);
84module_exit(ch_exit);
85MODULE_LICENSE("GPL");