1 /*
2 * HID driver for some ezkey "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/input.h>
21 #include <linux/hid.h>
22 #include <linux/module.h>
23
24 #include "hid-ids.h"
25
26 #define ez_map_rel(c) hid_map_usage(hi, usage, bit, max, EV_REL, (c))
27 #define ez_map_key(c) hid_map_usage(hi, usage, bit, max, EV_KEY, (c))
28
29 static int ez_input_mapping(struct hid_device *hdev, struct hid_input *hi,
30 struct hid_field *field, struct hid_usage *usage,
31 unsigned long **bit, int *max)
32 {
33 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
34 return 0;
35
36 switch (usage->hid & HID_USAGE) {
37 case 0x230: ez_map_key(BTN_MOUSE); break;
38 case 0x231: ez_map_rel(REL_WHEEL); break;
39 /*
40 * this keyboard has a scrollwheel implemented in
41 * totally broken way. We map this usage temporarily
42 * to HWHEEL and handle it in the event quirk handler
43 */
44 case 0x232: ez_map_rel(REL_HWHEEL); break;
45 default:
46 return 0;
47 }
48 return 1;
49 }
50
51 static int ez_event(struct hid_device *hdev, struct hid_field *field,
52 struct hid_usage *usage, __s32 value)
53 {
54 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
55 !usage->type)
56 return 0;
57
58 /* handle the temporary quirky mapping to HWHEEL */
59 if (usage->type == EV_REL && usage->code == REL_HWHEEL) {
60 struct input_dev *input = field->hidinput->input;
61 input_event(input, usage->type, REL_WHEEL, -value);
62 return 1;
63 }
64
65 return 0;
66 }
67
68 static const struct hid_device_id ez_devices[] = {
69 { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
70 { }
71 };
72 MODULE_DEVICE_TABLE(hid, ez_devices);
73
74 static struct hid_driver ez_driver = {
75 .name = "ezkey",
76 .id_table = ez_devices,
77 .input_mapping = ez_input_mapping,
78 .event = ez_event,
79 };
80
81 static int ez_init(void)
82 {
83 return hid_register_driver(&ez_driver);
84 }
85
86 static void ez_exit(void)
87 {
88 hid_unregister_driver(&ez_driver);
89 }
90
91 module_init(ez_init);
92 module_exit(ez_exit);
93 MODULE_LICENSE("GPL");
94
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