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 int hid_generic_probe(struct hid_device *hdev,
60 const struct hid_device_id *id)
61{
62 int ret;
63
64 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
65
66 ret = hid_parse(hdev);
67 if (ret)
68 return ret;
69
70 return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
71}
72
73static const struct hid_device_id hid_table[] = {
74 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, HID_ANY_ID, HID_ANY_ID) },
75 { }
76};
77MODULE_DEVICE_TABLE(hid, hid_table);
78
79static struct hid_driver hid_generic = {
80 .name = "hid-generic",
81 .id_table = hid_table,
82 .match = hid_generic_match,
83 .probe = hid_generic_probe,
84};
85module_hid_driver(hid_generic);
86
87MODULE_AUTHOR("Henrik Rydberg");
88MODULE_DESCRIPTION("HID generic driver");
89MODULE_LICENSE("GPL");
90