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78 lines
2.1 KiB
78 lines
2.1 KiB
// 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 <[email protected]> |
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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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