1/*
 2 *  HID support for Linux
 3 *
 4 *  Copyright (c) 1999 Andreas Gal
 5 *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
 6 *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
 7 *  Copyright (c) 2007-2008 Oliver Neukum
 8 *  Copyright (c) 2006-2012 Jiri Kosina
 9 *  Copyright (c) 2012 Henrik Rydberg
10 */
11
12/*
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the Free
15 * Software Foundation; either version 2 of the License, or (at your option)
16 * any later version.
17 */
18
19#include <linux/module.h>
20#include <linux/slab.h>
21#include <linux/kernel.h>
22#include <asm/unaligned.h>
23#include <asm/byteorder.h>
24
25#include <linux/hid.h>
26
27static struct hid_driver hid_generic;
28
29static int __check_hid_generic(struct device_driver *drv, void *data)
30{
31	struct hid_driver *hdrv = to_hid_driver(drv);
32	struct hid_device *hdev = data;
33
34	if (hdrv == &hid_generic)
35		return 0;
36
37	return hid_match_device(hdev, hdrv) != NULL;
38}
39
40static bool hid_generic_match(struct hid_device *hdev,
41			      bool ignore_special_driver)
42{
43	if (ignore_special_driver)
44		return true;
45
46	if (hdev->quirks & HID_QUIRK_HAVE_SPECIAL_DRIVER)
47		return false;
48
49	/*
50	 * If any other driver wants the device, leave the device to this other
51	 * driver.
52	 */
53	if (bus_for_each_drv(&hid_bus_type, NULL, hdev, __check_hid_generic))
54		return false;
55
56	return true;
57}
58
59static const struct hid_device_id hid_table[] = {
60	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, HID_ANY_ID, HID_ANY_ID) },
61	{ }
62};
63MODULE_DEVICE_TABLE(hid, hid_table);
64
65static struct hid_driver hid_generic = {
66	.name = "hid-generic",
67	.id_table = hid_table,
68	.match = hid_generic_match,
69};
70module_hid_driver(hid_generic);
71
72MODULE_AUTHOR("Henrik Rydberg");
73MODULE_DESCRIPTION("HID generic driver");
74MODULE_LICENSE("GPL");