drivers/hid/hid-keytouch.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  HID driver for Keytouch devices not fully compliant with HID standard
   4  *
   5  *  Copyright (c) 2011 Jiri Kosina
   6  */
   7
   8 /*
   9  */
  10
  11 #include <linux/device.h>
  12 #include <linux/hid.h>
  13 #include <linux/module.h>
  14
  15 #include "hid-ids.h"
  16
  17 /* Replace the broken report descriptor of this device with rather
  18  * a default one */
  19 static const __u8 keytouch_fixed_rdesc[] = {
  20 0x05, 0x01, 0x09, 0x06, 0xa1, 0x01, 0x05, 0x07, 0x19, 0xe0, 0x29, 0xe7, 0x15,
  21 0x00, 0x25, 0x01, 0x75, 0x01, 0x95, 0x08, 0x81, 0x02, 0x95, 0x01, 0x75, 0x08,
  22 0x81, 0x01, 0x95, 0x03, 0x75, 0x01, 0x05, 0x08, 0x19, 0x01, 0x29, 0x03, 0x91,
  23 0x02, 0x95, 0x05, 0x75, 0x01, 0x91, 0x01, 0x95, 0x06, 0x75, 0x08, 0x15, 0x00,
  24 0x26, 0xff, 0x00, 0x05, 0x07, 0x19, 0x00, 0x2a, 0xff, 0x00, 0x81, 0x00, 0xc0
  25 };
  26
  27 static const __u8 *keytouch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  28                 unsigned int *rsize)
  29 {
  30         hid_info(hdev, "fixing up Keytouch IEC report descriptor\n");
  31
  32         *rsize = sizeof(keytouch_fixed_rdesc);
  33         return keytouch_fixed_rdesc;
  34 }
  35
  36 static const struct hid_device_id keytouch_devices[] = {
  37         { HID_USB_DEVICE(USB_VENDOR_ID_KEYTOUCH, USB_DEVICE_ID_KEYTOUCH_IEC) },
  38         { }
  39 };
  40 MODULE_DEVICE_TABLE(hid, keytouch_devices);
  41
  42 static struct hid_driver keytouch_driver = {
  43         .name = "keytouch",
  44         .id_table = keytouch_devices,
  45         .report_fixup = keytouch_report_fixup,
  46 };
  47 module_hid_driver(keytouch_driver);
  48
  49 MODULE_DESCRIPTION("HID driver for Keytouch devices not fully compliant with HID standard");
  50 MODULE_LICENSE("GPL");
  51 MODULE_AUTHOR("Jiri Kosina");