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 #include <linux/usb.h> 20 21 #include "hid-ids.h" 22 #include "usbhid/usbhid.h" 23 24 static const struct hid_device_id speedlink_devices[] = { 25 { HID_USB_DEVICE(USB_VENDOR_ID_X_TENSIONS, USB_DEVICE_ID_SPEEDLINK_VAD_CEZANNE)}, 26 { } 27 }; 28 29 static int speedlink_input_mapping(struct hid_device *hdev, 30 struct hid_input *hi, 31 struct hid_field *field, struct hid_usage *usage, 32 unsigned long **bit, int *max) 33 { 34 /* 35 * The Cezanne mouse has a second "keyboard" USB endpoint for it is 36 * able to map keyboard events to the button presses. 37 * It sends a standard keyboard report descriptor, though, whose 38 * LEDs we ignore. 39 */ 40 switch (usage->hid & HID_USAGE_PAGE) { 41 case HID_UP_LED: 42 return -1; 43 } 44 return 0; 45 } 46 47 static int speedlink_event(struct hid_device *hdev, struct hid_field *field, 48 struct hid_usage *usage, __s32 value) 49 { 50 /* No other conditions due to usage_table. */ 51 /* Fix "jumpy" cursor (invalid events sent by device). */ 52 if (value == 256) 53 return 1; 54 /* Drop useless distance 0 events (on button clicks etc.) as well */ 55 if (value == 0) 56 return 1; 57 58 return 0; 59 } 60 61 MODULE_DEVICE_TABLE(hid, speedlink_devices); 62 63 static const struct hid_usage_id speedlink_grabbed_usages[] = { 64 { HID_GD_X, EV_REL, 0 }, 65 { HID_GD_Y, EV_REL, 1 }, 66 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1} 67 }; 68 69 static struct hid_driver speedlink_driver = { 70 .name = "speedlink", 71 .id_table = speedlink_devices, 72 .usage_table = speedlink_grabbed_usages, 73 .input_mapping = speedlink_input_mapping, 74 .event = speedlink_event, 75 }; 76 77 static int __init speedlink_init(void) 78 { 79 return hid_register_driver(&speedlink_driver); 80 } 81 82 static void __exit speedlink_exit(void) 83 { 84 hid_unregister_driver(&speedlink_driver); 85 } 86 87 module_init(speedlink_init); 88 module_exit(speedlink_exit); 89 MODULE_LICENSE("GPL"); 90