LXR linux/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
  28static __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
  41static 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};
  48MODULE_DEVICE_TABLE(hid, ortek_devices);
  49
  50static struct hid_driver ortek_driver = {
  51        .name = "ortek",
  52        .id_table = ortek_devices,
  53        .report_fixup = ortek_report_fixup
  54};
  55module_hid_driver(ortek_driver);
  56
  57MODULE_LICENSE("GPL");
  58