drivers/hid/hid-elecom.c

   1 /*
   2  *  HID driver for Elecom BM084 (bluetooth mouse).
   3  *  Removes a non-existing horizontal wheel from
   4  *  the HID descriptor.
   5  *  (This module is based on "hid-ortek".)
   6  *
   7  *  Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com>
   8  */
   9
  10 /*
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License as published by the Free
  13  * Software Foundation; either version 2 of the License, or (at your option)
  14  * any later version.
  15  */
  16
  17 #include <linux/device.h>
  18 #include <linux/hid.h>
  19 #include <linux/module.h>
  20
  21 #include "hid-ids.h"
  22
  23 static __u8 *elecom_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  24                 unsigned int *rsize)
  25 {
  26         if (*rsize >= 48 && rdesc[46] == 0x05 && rdesc[47] == 0x0c) {
  27                 hid_info(hdev, "Fixing up Elecom BM084 report descriptor\n");
  28                 rdesc[47] = 0x00;
  29         }
  30     return rdesc;
  31 }
  32
  33 static const struct hid_device_id elecom_devices[] = {
  34         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084)},
  35         { }
  36 };
  37 MODULE_DEVICE_TABLE(hid, elecom_devices);
  38
  39 static struct hid_driver elecom_driver = {
  40         .name = "elecom",
  41         .id_table = elecom_devices,
  42         .report_fixup = elecom_report_fixup
  43 };
  44
  45 static int __init elecom_init(void)
  46 {
  47         return hid_register_driver(&elecom_driver);
  48 }
  49
  50 static void __exit elecom_exit(void)
  51 {
  52         hid_unregister_driver(&elecom_driver);
  53 }
  54
  55 module_init(elecom_init);
  56 module_exit(elecom_exit);
  57 MODULE_LICENSE("GPL");