Commit | Line | Data |
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74bc6953 SK |
1 | /* |
2 | * HID driver for Speedlink Vicious and Divine Cezanne (USB mouse). | |
3 | * Fixes "jumpy" cursor and removes nonexistent keyboard LEDS from | |
4 | * the HID descriptor. | |
5 | * | |
6 | * Copyright (c) 2011 Stefan Kriwanek <mail@stefankriwanek.de> | |
7 | */ | |
8 | ||
9 | /* | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License as published by the Free | |
12 | * Software Foundation; either version 2 of the License, or (at your option) | |
13 | * any later version. | |
14 | */ | |
15 | ||
16 | #include <linux/device.h> | |
17 | #include <linux/hid.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/usb.h> | |
20 | ||
21 | #include "hid-ids.h" | |
22 | #include "usbhid/usbhid.h" | |
23 | ||
24 | static const struct hid_device_id speedlink_devices[] = { | |
25 | { HID_USB_DEVICE(USB_VENDOR_ID_X_TENSIONS, USB_DEVICE_ID_SPEEDLINK_VAD_CEZANNE)}, | |
26 | { } | |
27 | }; | |
28 | ||
29 | static int speedlink_input_mapping(struct hid_device *hdev, | |
30 | struct hid_input *hi, | |
31 | struct hid_field *field, struct hid_usage *usage, | |
32 | unsigned long **bit, int *max) | |
33 | { | |
34 | /* | |
35 | * The Cezanne mouse has a second "keyboard" USB endpoint for it is | |
36 | * able to map keyboard events to the button presses. | |
37 | * It sends a standard keyboard report descriptor, though, whose | |
38 | * LEDs we ignore. | |
39 | */ | |
40 | switch (usage->hid & HID_USAGE_PAGE) { | |
41 | case HID_UP_LED: | |
42 | return -1; | |
43 | } | |
44 | return 0; | |
45 | } | |
46 | ||
47 | static int speedlink_event(struct hid_device *hdev, struct hid_field *field, | |
48 | struct hid_usage *usage, __s32 value) | |
49 | { | |
50 | /* No other conditions due to usage_table. */ | |
51 | /* Fix "jumpy" cursor (invalid events sent by device). */ | |
52 | if (value == 256) | |
53 | return 1; | |
54 | /* Drop useless distance 0 events (on button clicks etc.) as well */ | |
55 | if (value == 0) | |
56 | return 1; | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
61 | MODULE_DEVICE_TABLE(hid, speedlink_devices); | |
62 | ||
63 | static const struct hid_usage_id speedlink_grabbed_usages[] = { | |
64 | { HID_GD_X, EV_REL, 0 }, | |
65 | { HID_GD_Y, EV_REL, 1 }, | |
66 | { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1} | |
67 | }; | |
68 | ||
69 | static struct hid_driver speedlink_driver = { | |
70 | .name = "speedlink", | |
71 | .id_table = speedlink_devices, | |
72 | .usage_table = speedlink_grabbed_usages, | |
73 | .input_mapping = speedlink_input_mapping, | |
74 | .event = speedlink_event, | |
75 | }; | |
76 | ||
77 | static int __init speedlink_init(void) | |
78 | { | |
79 | return hid_register_driver(&speedlink_driver); | |
80 | } | |
81 | ||
82 | static void __exit speedlink_exit(void) | |
83 | { | |
84 | hid_unregister_driver(&speedlink_driver); | |
85 | } | |
86 | ||
87 | module_init(speedlink_init); | |
88 | module_exit(speedlink_exit); | |
89 | MODULE_LICENSE("GPL"); |