Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
[linux-2.6-block.git] / drivers / hid / hid-generic.c
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
27 static struct hid_driver hid_generic;
28
29 static 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
40 static 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
59 static const struct hid_device_id hid_table[] = {
60         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, HID_ANY_ID, HID_ANY_ID) },
61         { }
62 };
63 MODULE_DEVICE_TABLE(hid, hid_table);
64
65 static struct hid_driver hid_generic = {
66         .name = "hid-generic",
67         .id_table = hid_table,
68         .match = hid_generic_match,
69 };
70 module_hid_driver(hid_generic);
71
72 MODULE_AUTHOR("Henrik Rydberg");
73 MODULE_DESCRIPTION("HID generic driver");
74 MODULE_LICENSE("GPL");