cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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hid-generic.c (1924B)

      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
     24static struct hid_driver hid_generic;
     25
     26static 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
     37static 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(&hid_bus_type, NULL, hdev, __check_hid_generic))
     51		return false;
     52
     53	return true;
     54}
     55
     56static 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
     70static const struct hid_device_id hid_table[] = {
     71	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, HID_ANY_ID, HID_ANY_ID) },
     72	{ }
     73};
     74MODULE_DEVICE_TABLE(hid, hid_table);
     75
     76static 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};
     82module_hid_driver(hid_generic);
     83
     84MODULE_AUTHOR("Henrik Rydberg");
     85MODULE_DESCRIPTION("HID generic driver");
     86MODULE_LICENSE("GPL");