1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * HID support for Linux
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (c) 1999 Andreas Gal
6*4882a593Smuzhiyun * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
7*4882a593Smuzhiyun * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
8*4882a593Smuzhiyun * Copyright (c) 2007-2008 Oliver Neukum
9*4882a593Smuzhiyun * Copyright (c) 2006-2012 Jiri Kosina
10*4882a593Smuzhiyun * Copyright (c) 2012 Henrik Rydberg
11*4882a593Smuzhiyun */
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun /*
14*4882a593Smuzhiyun */
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <linux/module.h>
17*4882a593Smuzhiyun #include <linux/slab.h>
18*4882a593Smuzhiyun #include <linux/kernel.h>
19*4882a593Smuzhiyun #include <asm/unaligned.h>
20*4882a593Smuzhiyun #include <asm/byteorder.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #include <linux/hid.h>
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun static struct hid_driver hid_generic;
25*4882a593Smuzhiyun
__check_hid_generic(struct device_driver * drv,void * data)26*4882a593Smuzhiyun static int __check_hid_generic(struct device_driver *drv, void *data)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun struct hid_driver *hdrv = to_hid_driver(drv);
29*4882a593Smuzhiyun struct hid_device *hdev = data;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun if (hdrv == &hid_generic)
32*4882a593Smuzhiyun return 0;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun return hid_match_device(hdev, hdrv) != NULL;
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun
hid_generic_match(struct hid_device * hdev,bool ignore_special_driver)37*4882a593Smuzhiyun static bool hid_generic_match(struct hid_device *hdev,
38*4882a593Smuzhiyun bool ignore_special_driver)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun if (ignore_special_driver)
41*4882a593Smuzhiyun return true;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun if (hdev->quirks & HID_QUIRK_HAVE_SPECIAL_DRIVER)
44*4882a593Smuzhiyun return false;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun /*
47*4882a593Smuzhiyun * If any other driver wants the device, leave the device to this other
48*4882a593Smuzhiyun * driver.
49*4882a593Smuzhiyun */
50*4882a593Smuzhiyun if (bus_for_each_drv(&hid_bus_type, NULL, hdev, __check_hid_generic))
51*4882a593Smuzhiyun return false;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun return true;
54*4882a593Smuzhiyun }
55*4882a593Smuzhiyun
hid_generic_probe(struct hid_device * hdev,const struct hid_device_id * id)56*4882a593Smuzhiyun static int hid_generic_probe(struct hid_device *hdev,
57*4882a593Smuzhiyun const struct hid_device_id *id)
58*4882a593Smuzhiyun {
59*4882a593Smuzhiyun int ret;
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun ret = hid_parse(hdev);
64*4882a593Smuzhiyun if (ret)
65*4882a593Smuzhiyun return ret;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun static const struct hid_device_id hid_table[] = {
71*4882a593Smuzhiyun { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, HID_ANY_ID, HID_ANY_ID) },
72*4882a593Smuzhiyun { }
73*4882a593Smuzhiyun };
74*4882a593Smuzhiyun MODULE_DEVICE_TABLE(hid, hid_table);
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun static struct hid_driver hid_generic = {
77*4882a593Smuzhiyun .name = "hid-generic",
78*4882a593Smuzhiyun .id_table = hid_table,
79*4882a593Smuzhiyun .match = hid_generic_match,
80*4882a593Smuzhiyun .probe = hid_generic_probe,
81*4882a593Smuzhiyun };
82*4882a593Smuzhiyun module_hid_driver(hid_generic);
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun MODULE_AUTHOR("Henrik Rydberg");
85*4882a593Smuzhiyun MODULE_DESCRIPTION("HID generic driver");
86*4882a593Smuzhiyun MODULE_LICENSE("GPL");
87