Line data    Source code

       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           0 : static int __check_hid_generic(struct device_driver *drv, void *data)
      27             : {
      28           0 :         struct hid_driver *hdrv = to_hid_driver(drv);
      29           0 :         struct hid_device *hdev = data;
      30             : 
      31           0 :         if (hdrv == &hid_generic)
      32             :                 return 0;
      33             : 
      34           0 :         return hid_match_device(hdev, hdrv) != NULL;
      35             : }
      36             : 
      37           0 : static bool hid_generic_match(struct hid_device *hdev,
      38             :                               bool ignore_special_driver)
      39             : {
      40           0 :         if (ignore_special_driver)
      41             :                 return true;
      42             : 
      43           0 :         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           0 :         if (bus_for_each_drv(&hid_bus_type, NULL, hdev, __check_hid_generic))
      51             :                 return false;
      52             : 
      53           0 :         return true;
      54             : }
      55             : 
      56           0 : static int hid_generic_probe(struct hid_device *hdev,
      57             :                              const struct hid_device_id *id)
      58             : {
      59             :         int ret;
      60             : 
      61           0 :         hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
      62             : 
      63           0 :         ret = hid_parse(hdev);
      64           0 :         if (ret)
      65             :                 return ret;
      66             : 
      67           0 :         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           1 : module_hid_driver(hid_generic);
      83             : 
      84             : MODULE_AUTHOR("Henrik Rydberg");
      85             : MODULE_DESCRIPTION("HID generic driver");
      86             : MODULE_LICENSE("GPL");