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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * HID support for Linux4 *5 * Copyright (c) 1999 Andreas Gal6 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>7 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc8 * Copyright (c) 2007-2008 Oliver Neukum9 * Copyright (c) 2006-2012 Jiri Kosina10 * Copyright (c) 2012 Henrik Rydberg11 */12 13/*14 */15 16#include <linux/module.h>17#include <linux/slab.h>18#include <linux/kernel.h>19#include <linux/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 other48 * 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");87