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                 dev_info(&hdev->dev, "Fixing up Elecom BM084 "
  28                                 "report descriptor.\n");
  29                 rdesc[47] = 0x00;
  30         }
  31     return rdesc;
  32 }
  33
  34 static const struct hid_device_id elecom_devices[] = {
  35         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084)},
  36         { }
  37 };
  38 MODULE_DEVICE_TABLE(hid, elecom_devices);
  39
  40 static struct hid_driver elecom_driver = {
  41         .name = "elecom",
  42         .id_table = elecom_devices,
  43         .report_fixup = elecom_report_fixup
  44 };
  45
  46 static int __init elecom_init(void)
  47 {
  48         return hid_register_driver(&elecom_driver);
  49 }
  50
  51 static void __exit elecom_exit(void)
  52 {
  53         hid_unregister_driver(&elecom_driver);
  54 }
  55
  56 module_init(elecom_init);
  57 module_exit(elecom_exit);
  58 MODULE_LICENSE("GPL");