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 int hid_generic_probe(struct hid_device *hdev, 60 const struct hid_device_id *id) 61 { 62 int ret; 63 64 hdev->quirks |= HID_QUIRK_INPUT_PER_APP; 65 66 ret = hid_parse(hdev); 67 if (ret) 68 return ret; 69 70 return hid_hw_start(hdev, HID_CONNECT_DEFAULT); 71 } 72 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 { } 76 }; 77 MODULE_DEVICE_TABLE(hid, hid_table); 78 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, 84 }; 85 module_hid_driver(hid_generic); 86 87 MODULE_AUTHOR("Henrik Rydberg"); 88 MODULE_DESCRIPTION("HID generic driver"); 89 MODULE_LICENSE("GPL"); 90