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  *    iHome IMAC-A210S
   9  *    Skycable wireless presenter
  10  *
  11  *  Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
  12  *  Copyright (c) 2011 Jiri Kosina
  13  */
  14
  15 /*
  16  * This program is free software; you can redistribute it and/or modify it
  17  * under the terms of the GNU General Public License as published by the Free
  18  * Software Foundation; either version 2 of the License, or (at your option)
  19  * any later version.
  20  */
  21
  22 #include <linux/device.h>
  23 #include <linux/hid.h>
  24 #include <linux/module.h>
  25
  26 #include "hid-ids.h"
  27
  28 static __u8 *ortek_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  29                 unsigned int *rsize)
  30 {
  31         if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) {
  32                 hid_info(hdev, "Fixing up logical maximum in report descriptor (Ortek)\n");
  33                 rdesc[55] = 0x92;
  34         } else if (*rsize >= 54 && rdesc[52] == 0x25 && rdesc[53] == 0x01) {
  35                 hid_info(hdev, "Fixing up logical maximum in report descriptor (Skycable)\n");
  36                 rdesc[53] = 0x65;
  37         }
  38         return rdesc;
  39 }
  40
  41 static const struct hid_device_id ortek_devices[] = {
  42         { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
  43         { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
  44         { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_IHOME_IMAC_A210S) },
  45         { HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) },
  46         { }
  47 };
  48 MODULE_DEVICE_TABLE(hid, ortek_devices);
  49
  50 static struct hid_driver ortek_driver = {
  51         .name = "ortek",
  52         .id_table = ortek_devices,
  53         .report_fixup = ortek_report_fixup
  54 };
  55 module_hid_driver(ortek_driver);
  56
  57 MODULE_LICENSE("GPL");