tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * HID driver for some ntrig "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 * Copyright (c) 2008 Rafi Rubin
11 *
12 */
13
14/*
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the Free
17 * Software Foundation; either version 2 of the License, or (at your option)
18 * any later version.
19 */
20
21#include <linux/device.h>
22#include <linux/hid.h>
23#include <linux/module.h>
24
25#include "hid-ids.h"
26
27#define NTRIG_DUPLICATE_USAGES 0x001
28
29#define nt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
30 EV_KEY, (c))
31
32static int ntrig_input_mapping(struct hid_device *hdev, struct hid_input *hi,
33 struct hid_field *field, struct hid_usage *usage,
34 unsigned long **bit, int *max)
35{
36 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_DIGITIZER &&
37 (usage->hid & 0xff) == 0x47) {
38 nt_map_key_clear(BTN_TOOL_DOUBLETAP);
39 return 1;
40 }
41 return 0;
42}
43
44static int ntrig_input_mapped(struct hid_device *hdev, struct hid_input *hi,
45 struct hid_field *field, struct hid_usage *usage,
46 unsigned long **bit, int *max)
47{
48 if (usage->type == EV_KEY || usage->type == EV_REL
49 || usage->type == EV_ABS)
50 clear_bit(usage->code, *bit);
51
52 return 0;
53}
54static const struct hid_device_id ntrig_devices[] = {
55 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN),
56 .driver_data = NTRIG_DUPLICATE_USAGES },
57 { }
58};
59MODULE_DEVICE_TABLE(hid, ntrig_devices);
60
61static struct hid_driver ntrig_driver = {
62 .name = "ntrig",
63 .id_table = ntrig_devices,
64 .input_mapping = ntrig_input_mapping,
65 .input_mapped = ntrig_input_mapped,
66};
67
68static int ntrig_init(void)
69{
70 return hid_register_driver(&ntrig_driver);
71}
72
73static void ntrig_exit(void)
74{
75 hid_unregister_driver(&ntrig_driver);
76}
77
78module_init(ntrig_init);
79module_exit(ntrig_exit);
80MODULE_LICENSE("GPL");