linux/drivers/hid/hid-keytouch.c
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   1/*
   2 *  HID driver for Keytouch devices not fully compliant with HID standard
   3 *
   4 *  Copyright (c) 2011 Jiri Kosina
   5 */
   6
   7/*
   8 * This program is free software; you can redistribute it and/or modify it
   9 * under the terms of the GNU General Public License as published by the Free
  10 * Software Foundation; either version 2 of the License, or (at your option)
  11 * any later version.
  12 */
  13
  14#include <linux/device.h>
  15#include <linux/hid.h>
  16#include <linux/module.h>
  17
  18#include "hid-ids.h"
  19
  20/* Replace the broken report descriptor of this device with rather
  21 * a default one */
  22static __u8 keytouch_fixed_rdesc[] = {
  230x05, 0x01, 0x09, 0x06, 0xa1, 0x01, 0x05, 0x07, 0x19, 0xe0, 0x29, 0xe7, 0x15,
  240x00, 0x25, 0x01, 0x75, 0x01, 0x95, 0x08, 0x81, 0x02, 0x95, 0x01, 0x75, 0x08,
  250x81, 0x01, 0x95, 0x03, 0x75, 0x01, 0x05, 0x08, 0x19, 0x01, 0x29, 0x03, 0x91,
  260x02, 0x95, 0x05, 0x75, 0x01, 0x91, 0x01, 0x95, 0x06, 0x75, 0x08, 0x15, 0x00,
  270x26, 0xff, 0x00, 0x05, 0x07, 0x19, 0x00, 0x2a, 0xff, 0x00, 0x81, 0x00, 0xc0
  28};
  29
  30static __u8 *keytouch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  31                unsigned int *rsize)
  32{
  33        hid_info(hdev, "fixing up Keytouch IEC report descriptor\n");
  34
  35        rdesc = keytouch_fixed_rdesc;
  36        *rsize = sizeof(keytouch_fixed_rdesc);
  37
  38        return rdesc;
  39}
  40
  41static const struct hid_device_id keytouch_devices[] = {
  42        { HID_USB_DEVICE(USB_VENDOR_ID_KEYTOUCH, USB_DEVICE_ID_KEYTOUCH_IEC) },
  43        { }
  44};
  45MODULE_DEVICE_TABLE(hid, keytouch_devices);
  46
  47static struct hid_driver keytouch_driver = {
  48        .name = "keytouch",
  49        .id_table = keytouch_devices,
  50        .report_fixup = keytouch_report_fixup,
  51};
  52
  53static int __init keytouch_init(void)
  54{
  55        return hid_register_driver(&keytouch_driver);
  56}
  57
  58static void __exit keytouch_exit(void)
  59{
  60        hid_unregister_driver(&keytouch_driver);
  61}
  62
  63module_init(keytouch_init);
  64module_exit(keytouch_exit);
  65MODULE_LICENSE("GPL");
  66MODULE_AUTHOR("Jiri Kosina");
  67
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