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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* HID driver for Speedlink Vicious and Divine Cezanne (USB mouse).
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* Fixes "jumpy" cursor and removes nonexistent keyboard LEDS from
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* the HID descriptor.
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*
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* Copyright (c) 2011, 2013 Stefan Kriwanek <dev@stefankriwanek.de>
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*/
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/*
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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static const struct hid_device_id speedlink_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_X_TENSIONS, USB_DEVICE_ID_SPEEDLINK_VAD_CEZANNE)},
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{ }
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};
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static int speedlink_input_mapping(struct hid_device *hdev,
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struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max)
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{
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/*
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* The Cezanne mouse has a second "keyboard" USB endpoint for it is
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* able to map keyboard events to the button presses.
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* It sends a standard keyboard report descriptor, though, whose
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* LEDs we ignore.
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*/
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switch (usage->hid & HID_USAGE_PAGE) {
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case HID_UP_LED:
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return -1;
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}
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return 0;
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}
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static int speedlink_event(struct hid_device *hdev, struct hid_field *field,
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struct hid_usage *usage, __s32 value)
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{
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/* No other conditions due to usage_table. */
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/* This fixes the "jumpy" cursor occuring due to invalid events sent
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* by the device. Some devices only send them with value==+256, others
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* don't. However, catching abs(value)>=256 is restrictive enough not
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* to interfere with devices that were bug-free (has been tested).
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*/
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if (abs(value) >= 256)
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return 1;
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/* Drop useless distance 0 events (on button clicks etc.) as well */
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if (value == 0)
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return 1;
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return 0;
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}
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MODULE_DEVICE_TABLE(hid, speedlink_devices);
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static const struct hid_usage_id speedlink_grabbed_usages[] = {
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{ HID_GD_X, EV_REL, 0 },
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{ HID_GD_Y, EV_REL, 1 },
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{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
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};
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static struct hid_driver speedlink_driver = {
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.name = "speedlink",
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.id_table = speedlink_devices,
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.usage_table = speedlink_grabbed_usages,
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.input_mapping = speedlink_input_mapping,
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.event = speedlink_event,
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};
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module_hid_driver(speedlink_driver);
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MODULE_LICENSE("GPL");
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