| /* |
| * HID driver for Speedlink Vicious and Divine Cezanne (USB mouse). |
| * Fixes "jumpy" cursor and removes nonexistent keyboard LEDS from |
| * the HID descriptor. |
| * |
| * Copyright (c) 2011, 2013 Stefan Kriwanek <dev@stefankriwanek.de> |
| */ |
| |
| /* |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the Free |
| * Software Foundation; either version 2 of the License, or (at your option) |
| * any later version. |
| */ |
| |
| #include <linux/device.h> |
| #include <linux/hid.h> |
| #include <linux/module.h> |
| #include <linux/usb.h> |
| |
| #include "hid-ids.h" |
| #include "usbhid/usbhid.h" |
| |
| static const struct hid_device_id speedlink_devices[] = { |
| { HID_USB_DEVICE(USB_VENDOR_ID_X_TENSIONS, USB_DEVICE_ID_SPEEDLINK_VAD_CEZANNE)}, |
| { } |
| }; |
| |
| static int speedlink_input_mapping(struct hid_device *hdev, |
| struct hid_input *hi, |
| struct hid_field *field, struct hid_usage *usage, |
| unsigned long **bit, int *max) |
| { |
| /* |
| * The Cezanne mouse has a second "keyboard" USB endpoint for it is |
| * able to map keyboard events to the button presses. |
| * It sends a standard keyboard report descriptor, though, whose |
| * LEDs we ignore. |
| */ |
| switch (usage->hid & HID_USAGE_PAGE) { |
| case HID_UP_LED: |
| return -1; |
| } |
| return 0; |
| } |
| |
| static int speedlink_event(struct hid_device *hdev, struct hid_field *field, |
| struct hid_usage *usage, __s32 value) |
| { |
| /* No other conditions due to usage_table. */ |
| |
| /* This fixes the "jumpy" cursor occuring due to invalid events sent |
| * by the device. Some devices only send them with value==+256, others |
| * don't. However, catching abs(value)>=256 is restrictive enough not |
| * to interfere with devices that were bug-free (has been tested). |
| */ |
| if (abs(value) >= 256) |
| return 1; |
| /* Drop useless distance 0 events (on button clicks etc.) as well */ |
| if (value == 0) |
| return 1; |
| |
| return 0; |
| } |
| |
| MODULE_DEVICE_TABLE(hid, speedlink_devices); |
| |
| static const struct hid_usage_id speedlink_grabbed_usages[] = { |
| { HID_GD_X, EV_REL, 0 }, |
| { HID_GD_Y, EV_REL, 1 }, |
| { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1} |
| }; |
| |
| static struct hid_driver speedlink_driver = { |
| .name = "speedlink", |
| .id_table = speedlink_devices, |
| .usage_table = speedlink_grabbed_usages, |
| .input_mapping = speedlink_input_mapping, |
| .event = speedlink_event, |
| }; |
| |
| static int __init speedlink_init(void) |
| { |
| return hid_register_driver(&speedlink_driver); |
| } |
| |
| static void __exit speedlink_exit(void) |
| { |
| hid_unregister_driver(&speedlink_driver); |
| } |
| |
| module_init(speedlink_init); |
| module_exit(speedlink_exit); |
| MODULE_LICENSE("GPL"); |