drivers/hid/hid-ortek.c

   1 /*
   2  *  HID driver for various devices which are apparently based on the same chipset
   3  *  from certain vendor which produces chips that contain wrong LogicalMaximum
   4  *  value in their HID report descriptor. Currently supported devices are:
   5  *
   6  *    Ortek PKB-1700
   7  *    Ortek WKB-2000
   8  *    Skycable wireless presenter
   9  *
  10  *  Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
  11  *  Copyright (c) 2011 Jiri Kosina
  12  */
  13
  14 /*
  15  * This program is free software; you can redistribute it and/or modify it
  16  * under the terms of the GNU General Public License as published by the Free
  17  * Software Foundation; either version 2 of the License, or (at your option)
  18  * any later version.
  19  */
  20
  21 #include <linux/device.h>
  22 #include <linux/hid.h>
  23 #include <linux/module.h>
  24
  25 #include "hid-ids.h"
  26
  27 static __u8 *ortek_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  28                 unsigned int *rsize)
  29 {
  30         if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) {
  31                 hid_info(hdev, "Fixing up logical minimum in report descriptor (Ortek)\n");
  32                 rdesc[55] = 0x92;
  33         } else if (*rsize >= 54 && rdesc[52] == 0x25 && rdesc[53] == 0x01) {
  34                 hid_info(hdev, "Fixing up logical minimum in report descriptor (Skycable)\n");
  35                 rdesc[53] = 0x65;
  36         }
  37         return rdesc;
  38 }
  39
  40 static const struct hid_device_id ortek_devices[] = {
  41         { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
  42         { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
  43         { HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) },
  44         { }
  45 };
  46 MODULE_DEVICE_TABLE(hid, ortek_devices);
  47
  48 static struct hid_driver ortek_driver = {
  49         .name = "ortek",
  50         .id_table = ortek_devices,
  51         .report_fixup = ortek_report_fixup
  52 };
  53
  54 static int __init ortek_init(void)
  55 {
  56         return hid_register_driver(&ortek_driver);
  57 }
  58
  59 static void __exit ortek_exit(void)
  60 {
  61         hid_unregister_driver(&ortek_driver);
  62 }
  63
  64 module_init(ortek_init);
  65 module_exit(ortek_exit);
  66 MODULE_LICENSE("GPL");