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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1f243e30 JS |
2 | /* |
3 | * HID driver for some ezkey "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 | |
1f243e30 JS |
9 | * Copyright (c) 2008 Jiri Slaby |
10 | */ | |
11 | ||
12 | /* | |
1f243e30 JS |
13 | */ |
14 | ||
15 | #include <linux/device.h> | |
16 | #include <linux/input.h> | |
17 | #include <linux/hid.h> | |
18 | #include <linux/module.h> | |
19 | ||
20 | #include "hid-ids.h" | |
21 | ||
22 | #define ez_map_rel(c) hid_map_usage(hi, usage, bit, max, EV_REL, (c)) | |
23 | #define ez_map_key(c) hid_map_usage(hi, usage, bit, max, EV_KEY, (c)) | |
24 | ||
25 | static int ez_input_mapping(struct hid_device *hdev, struct hid_input *hi, | |
26 | struct hid_field *field, struct hid_usage *usage, | |
27 | unsigned long **bit, int *max) | |
28 | { | |
29 | if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER) | |
30 | return 0; | |
31 | ||
32 | switch (usage->hid & HID_USAGE) { | |
33 | case 0x230: ez_map_key(BTN_MOUSE); break; | |
34 | case 0x231: ez_map_rel(REL_WHEEL); break; | |
35 | /* | |
36 | * this keyboard has a scrollwheel implemented in | |
37 | * totally broken way. We map this usage temporarily | |
38 | * to HWHEEL and handle it in the event quirk handler | |
39 | */ | |
40 | case 0x232: ez_map_rel(REL_HWHEEL); break; | |
41 | default: | |
42 | return 0; | |
43 | } | |
44 | return 1; | |
45 | } | |
46 | ||
47 | static int ez_event(struct hid_device *hdev, struct hid_field *field, | |
48 | struct hid_usage *usage, __s32 value) | |
49 | { | |
50 | if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || | |
51 | !usage->type) | |
52 | return 0; | |
53 | ||
54 | /* handle the temporary quirky mapping to HWHEEL */ | |
55 | if (usage->type == EV_REL && usage->code == REL_HWHEEL) { | |
56 | struct input_dev *input = field->hidinput->input; | |
57 | input_event(input, usage->type, REL_WHEEL, -value); | |
58 | return 1; | |
59 | } | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
64 | static const struct hid_device_id ez_devices[] = { | |
65 | { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) }, | |
66 | { } | |
67 | }; | |
68 | MODULE_DEVICE_TABLE(hid, ez_devices); | |
69 | ||
70 | static struct hid_driver ez_driver = { | |
71 | .name = "ezkey", | |
72 | .id_table = ez_devices, | |
73 | .input_mapping = ez_input_mapping, | |
74 | .event = ez_event, | |
75 | }; | |
f425458e | 76 | module_hid_driver(ez_driver); |
1f243e30 | 77 | |
1f243e30 | 78 | MODULE_LICENSE("GPL"); |