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