V4L/DVB (9759): em28xx: move gpio tables to the top of em28xx-cards
[linux-2.6] / drivers / hid / hid-ezkey.c
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
95 HID_COMPAT_LOAD_DRIVER(ezkey);