1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * HID driver for some ezkey "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/input.h>
17*4882a593Smuzhiyun #include <linux/hid.h>
18*4882a593Smuzhiyun #include <linux/module.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #include "hid-ids.h"
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #define ez_map_rel(c) hid_map_usage(hi, usage, bit, max, EV_REL, (c))
23*4882a593Smuzhiyun #define ez_map_key(c) hid_map_usage(hi, usage, bit, max, EV_KEY, (c))
24*4882a593Smuzhiyun
ez_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)25*4882a593Smuzhiyun static int ez_input_mapping(struct hid_device *hdev, struct hid_input *hi,
26*4882a593Smuzhiyun struct hid_field *field, struct hid_usage *usage,
27*4882a593Smuzhiyun unsigned long **bit, int *max)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
30*4882a593Smuzhiyun return 0;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun switch (usage->hid & HID_USAGE) {
33*4882a593Smuzhiyun case 0x230: ez_map_key(BTN_MOUSE); break;
34*4882a593Smuzhiyun case 0x231: ez_map_rel(REL_WHEEL); break;
35*4882a593Smuzhiyun /*
36*4882a593Smuzhiyun * this keyboard has a scrollwheel implemented in
37*4882a593Smuzhiyun * totally broken way. We map this usage temporarily
38*4882a593Smuzhiyun * to HWHEEL and handle it in the event quirk handler
39*4882a593Smuzhiyun */
40*4882a593Smuzhiyun case 0x232: ez_map_rel(REL_HWHEEL); break;
41*4882a593Smuzhiyun default:
42*4882a593Smuzhiyun return 0;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun return 1;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
ez_event(struct hid_device * hdev,struct hid_field * field,struct hid_usage * usage,__s32 value)47*4882a593Smuzhiyun static int ez_event(struct hid_device *hdev, struct hid_field *field,
48*4882a593Smuzhiyun struct hid_usage *usage, __s32 value)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
51*4882a593Smuzhiyun !usage->type)
52*4882a593Smuzhiyun return 0;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun /* handle the temporary quirky mapping to HWHEEL */
55*4882a593Smuzhiyun if (usage->type == EV_REL && usage->code == REL_HWHEEL) {
56*4882a593Smuzhiyun struct input_dev *input = field->hidinput->input;
57*4882a593Smuzhiyun input_event(input, usage->type, REL_WHEEL, -value);
58*4882a593Smuzhiyun return 1;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun return 0;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun static const struct hid_device_id ez_devices[] = {
65*4882a593Smuzhiyun { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
66*4882a593Smuzhiyun { }
67*4882a593Smuzhiyun };
68*4882a593Smuzhiyun MODULE_DEVICE_TABLE(hid, ez_devices);
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun static struct hid_driver ez_driver = {
71*4882a593Smuzhiyun .name = "ezkey",
72*4882a593Smuzhiyun .id_table = ez_devices,
73*4882a593Smuzhiyun .input_mapping = ez_input_mapping,
74*4882a593Smuzhiyun .event = ez_event,
75*4882a593Smuzhiyun };
76*4882a593Smuzhiyun module_hid_driver(ez_driver);
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun MODULE_LICENSE("GPL");
79