| Stefan Kriwanek | 74bc695 | 2011-05-27 18:40:29 +0200 | [diff] [blame] | 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"); |