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Release 4.7 drivers/hid/hid-speedlink.c

Directory: drivers/hid
/*
 *  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 "hid-ids.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; }

Contributors

PersonTokensPropCommitsCommitProp
stefan kriwanekstefan kriwanek57100.00%1100.00%
Total57100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
stefan kriwanekstefan kriwanek51100.00%2100.00%
Total51100.00%2100.00%

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, }; module_hid_driver(speedlink_driver); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
stefan kriwanekstefan kriwanek22899.13%266.67%
h hartley sweetenh hartley sweeten20.87%133.33%
Total230100.00%3100.00%
Directory: drivers/hid
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