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 20 #include "hid-ids.h" 21 22 static const struct hid_device_id speedlink_devices[] = { 23 { HID_USB_DEVICE(USB_VENDOR_ID_X_TENSIONS, USB_DEVICE_ID_SPEEDLINK_VAD_CEZANNE)}, 24 { } 25 }; 26 27 static int speedlink_input_mapping(struct hid_device *hdev, 28 struct hid_input *hi, 29 struct hid_field *field, struct hid_usage *usage, 30 unsigned long **bit, int *max) 31 { 32 /* 33 * The Cezanne mouse has a second "keyboard" USB endpoint for it is 34 * able to map keyboard events to the button presses. 35 * It sends a standard keyboard report descriptor, though, whose 36 * LEDs we ignore. 37 */ 38 switch (usage->hid & HID_USAGE_PAGE) { 39 case HID_UP_LED: 40 return -1; 41 } 42 return 0; 43 } 44 45 static int speedlink_event(struct hid_device *hdev, struct hid_field *field, 46 struct hid_usage *usage, __s32 value) 47 { 48 /* No other conditions due to usage_table. */ 49 /* Fix "jumpy" cursor (invalid events sent by device). */ 50 if (value == 256) 51 return 1; 52 /* Drop useless distance 0 events (on button clicks etc.) as well */ 53 if (value == 0) 54 return 1; 55 56 return 0; 57 } 58 59 MODULE_DEVICE_TABLE(hid, speedlink_devices); 60 61 static const struct hid_usage_id speedlink_grabbed_usages[] = { 62 { HID_GD_X, EV_REL, 0 }, 63 { HID_GD_Y, EV_REL, 1 }, 64 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1} 65 }; 66 67 static struct hid_driver speedlink_driver = { 68 .name = "speedlink", 69 .id_table = speedlink_devices, 70 .usage_table = speedlink_grabbed_usages, 71 .input_mapping = speedlink_input_mapping, 72 .event = speedlink_event, 73 }; 74 module_hid_driver(speedlink_driver); 75 76 MODULE_LICENSE("GPL"); 77