HID: hid-elecom: extend to fix descriptor for HUGE trackball
[sfrench/cifs-2.6.git] / 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) 2008 Jiri Slaby
9  */
10
11 /*
12  * This program is free software; you can redistribute it and/or modify it
13  * under the terms of the GNU General Public License as published by the Free
14  * Software Foundation; either version 2 of the License, or (at your option)
15  * any later version.
16  */
17
18 #include <linux/device.h>
19 #include <linux/input.h>
20 #include <linux/hid.h>
21 #include <linux/module.h>
22
23 #include "hid-ids.h"
24
25 #define ez_map_rel(c)   hid_map_usage(hi, usage, bit, max, EV_REL, (c))
26 #define ez_map_key(c)   hid_map_usage(hi, usage, bit, max, EV_KEY, (c))
27
28 static int ez_input_mapping(struct hid_device *hdev, struct hid_input *hi,
29                 struct hid_field *field, struct hid_usage *usage,
30                 unsigned long **bit, int *max)
31 {
32         if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
33                 return 0;
34
35         switch (usage->hid & HID_USAGE) {
36         case 0x230: ez_map_key(BTN_MOUSE);      break;
37         case 0x231: ez_map_rel(REL_WHEEL);      break;
38         /*
39          * this keyboard has a scrollwheel implemented in
40          * totally broken way. We map this usage temporarily
41          * to HWHEEL and handle it in the event quirk handler
42          */
43         case 0x232: ez_map_rel(REL_HWHEEL);     break;
44         default:
45                 return 0;
46         }
47         return 1;
48 }
49
50 static int ez_event(struct hid_device *hdev, struct hid_field *field,
51                 struct hid_usage *usage, __s32 value)
52 {
53         if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
54                         !usage->type)
55                 return 0;
56
57         /* handle the temporary quirky mapping to HWHEEL */
58         if (usage->type == EV_REL && usage->code == REL_HWHEEL) {
59                 struct input_dev *input = field->hidinput->input;
60                 input_event(input, usage->type, REL_WHEEL, -value);
61                 return 1;
62         }
63
64         return 0;
65 }
66
67 static const struct hid_device_id ez_devices[] = {
68         { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
69         { }
70 };
71 MODULE_DEVICE_TABLE(hid, ez_devices);
72
73 static struct hid_driver ez_driver = {
74         .name = "ezkey",
75         .id_table = ez_devices,
76         .input_mapping = ez_input_mapping,
77         .event = ez_event,
78 };
79 module_hid_driver(ez_driver);
80
81 MODULE_LICENSE("GPL");