drivers/hid/hid-keytouch.c

   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 */
  22 static __u8 keytouch_fixed_rdesc[] = {
  23 0x05, 0x01, 0x09, 0x06, 0xa1, 0x01, 0x05, 0x07, 0x19, 0xe0, 0x29, 0xe7, 0x15,
  24 0x00, 0x25, 0x01, 0x75, 0x01, 0x95, 0x08, 0x81, 0x02, 0x95, 0x01, 0x75, 0x08,
  25 0x81, 0x01, 0x95, 0x03, 0x75, 0x01, 0x05, 0x08, 0x19, 0x01, 0x29, 0x03, 0x91,
  26 0x02, 0x95, 0x05, 0x75, 0x01, 0x91, 0x01, 0x95, 0x06, 0x75, 0x08, 0x15, 0x00,
  27 0x26, 0xff, 0x00, 0x05, 0x07, 0x19, 0x00, 0x2a, 0xff, 0x00, 0x81, 0x00, 0xc0
  28 };
  29
  30 static __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
  41 static const struct hid_device_id keytouch_devices[] = {
  42         { HID_USB_DEVICE(USB_VENDOR_ID_KEYTOUCH, USB_DEVICE_ID_KEYTOUCH_IEC) },
  43         { }
  44 };
  45 MODULE_DEVICE_TABLE(hid, keytouch_devices);
  46
  47 static struct hid_driver keytouch_driver = {
  48         .name = "keytouch",
  49         .id_table = keytouch_devices,
  50         .report_fixup = keytouch_report_fixup,
  51 };
  52
  53 static int __init keytouch_init(void)
  54 {
  55         return hid_register_driver(&keytouch_driver);
  56 }
  57
  58 static void __exit keytouch_exit(void)
  59 {
  60         hid_unregister_driver(&keytouch_driver);
  61 }
  62
  63 module_init(keytouch_init);
  64 module_exit(keytouch_exit);
  65 MODULE_LICENSE("GPL");
  66 MODULE_AUTHOR("Jiri Kosina");