HID: hidraw, fix a NULL pointer dereference in hidraw_ioctl
[linux-2.6.git] / drivers / hid / hid-chicony.c
1 /*
2  *  HID driver for some chicony "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 ch_map_key_clear(c)     hid_map_usage_clear(hi, usage, bit, max, \
27                                         EV_KEY, (c))
28 static int ch_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_MSVENDOR)
33                 return 0;
34
35         set_bit(EV_REP, hi->input->evbit);
36         switch (usage->hid & HID_USAGE) {
37         case 0xff01: ch_map_key_clear(BTN_1);   break;
38         case 0xff02: ch_map_key_clear(BTN_2);   break;
39         case 0xff03: ch_map_key_clear(BTN_3);   break;
40         case 0xff04: ch_map_key_clear(BTN_4);   break;
41         case 0xff05: ch_map_key_clear(BTN_5);   break;
42         case 0xff06: ch_map_key_clear(BTN_6);   break;
43         case 0xff07: ch_map_key_clear(BTN_7);   break;
44         case 0xff08: ch_map_key_clear(BTN_8);   break;
45         case 0xff09: ch_map_key_clear(BTN_9);   break;
46         case 0xff0a: ch_map_key_clear(BTN_A);   break;
47         case 0xff0b: ch_map_key_clear(BTN_B);   break;
48         default:
49                 return 0;
50         }
51         return 1;
52 }
53
54 static const struct hid_device_id ch_devices[] = {
55         { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
56         { }
57 };
58 MODULE_DEVICE_TABLE(hid, ch_devices);
59
60 static struct hid_driver ch_driver = {
61         .name = "chicony",
62         .id_table = ch_devices,
63         .input_mapping = ch_input_mapping,
64 };
65
66 static int __init ch_init(void)
67 {
68         return hid_register_driver(&ch_driver);
69 }
70
71 static void __exit ch_exit(void)
72 {
73         hid_unregister_driver(&ch_driver);
74 }
75
76 module_init(ch_init);
77 module_exit(ch_exit);
78 MODULE_LICENSE("GPL");