Linux 4.19.133
[linux/fpc-iii.git] / drivers / hid / hid-generic.c
blob3b6eccbc251980a35b0161ab723ea0456d6db2c5
1 /*
2 * HID support for Linux
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
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.
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>
25 #include <linux/hid.h>
27 static struct hid_driver hid_generic;
29 static int __check_hid_generic(struct device_driver *drv, void *data)
31 struct hid_driver *hdrv = to_hid_driver(drv);
32 struct hid_device *hdev = data;
34 if (hdrv == &hid_generic)
35 return 0;
37 return hid_match_device(hdev, hdrv) != NULL;
40 static bool hid_generic_match(struct hid_device *hdev,
41 bool ignore_special_driver)
43 if (ignore_special_driver)
44 return true;
46 if (hdev->quirks & HID_QUIRK_HAVE_SPECIAL_DRIVER)
47 return false;
50 * If any other driver wants the device, leave the device to this other
51 * driver.
53 if (bus_for_each_drv(&hid_bus_type, NULL, hdev, __check_hid_generic))
54 return false;
56 return true;
59 static int hid_generic_probe(struct hid_device *hdev,
60 const struct hid_device_id *id)
62 int ret;
64 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
66 ret = hid_parse(hdev);
67 if (ret)
68 return ret;
70 return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
73 static const struct hid_device_id hid_table[] = {
74 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, HID_ANY_ID, HID_ANY_ID) },
75 { }
77 MODULE_DEVICE_TABLE(hid, hid_table);
79 static struct hid_driver hid_generic = {
80 .name = "hid-generic",
81 .id_table = hid_table,
82 .match = hid_generic_match,
83 .probe = hid_generic_probe,
85 module_hid_driver(hid_generic);
87 MODULE_AUTHOR("Henrik Rydberg");
88 MODULE_DESCRIPTION("HID generic driver");
89 MODULE_LICENSE("GPL");