1 /* $FreeBSD$ */ 2 /*- 3 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <dev/usb/usb_core.h> 28 #include <dev/usb/usb_lookup.h> 29 30 /*------------------------------------------------------------------------* 31 * usb2_lookup_id_by_info 32 * 33 * This functions takes an array of "struct usb2_device_id" and tries 34 * to match the entries with the information in "struct usb2_lookup_info". 35 * 36 * NOTE: The "sizeof_id" parameter must be a multiple of the 37 * usb2_device_id structure size. Else the behaviour of this function 38 * is undefined. 39 * 40 * Return values: 41 * NULL: No match found. 42 * Else: Pointer to matching entry. 43 *------------------------------------------------------------------------*/ 44 const struct usb2_device_id * 45 usb2_lookup_id_by_info(const struct usb2_device_id *id, uint32_t sizeof_id, 46 const struct usb2_lookup_info *info) 47 { 48 const struct usb2_device_id *id_end; 49 50 if (id == NULL) { 51 goto done; 52 } 53 id_end = (const void *)(((const uint8_t *)id) + sizeof_id); 54 55 /* 56 * Keep on matching array entries until we find a match or 57 * until we reach the end of the matching array: 58 */ 59 for (; id != id_end; id++) { 60 61 if ((id->match_flag_vendor) && 62 (id->idVendor != info->idVendor)) { 63 continue; 64 } 65 if ((id->match_flag_product) && 66 (id->idProduct != info->idProduct)) { 67 continue; 68 } 69 if ((id->match_flag_dev_lo) && 70 (id->bcdDevice_lo > info->bcdDevice)) { 71 continue; 72 } 73 if ((id->match_flag_dev_hi) && 74 (id->bcdDevice_hi < info->bcdDevice)) { 75 continue; 76 } 77 if ((id->match_flag_dev_class) && 78 (id->bDeviceClass != info->bDeviceClass)) { 79 continue; 80 } 81 if ((id->match_flag_dev_subclass) && 82 (id->bDeviceSubClass != info->bDeviceSubClass)) { 83 continue; 84 } 85 if ((id->match_flag_dev_protocol) && 86 (id->bDeviceProtocol != info->bDeviceProtocol)) { 87 continue; 88 } 89 if ((info->bDeviceClass == 0xFF) && 90 (!(id->match_flag_vendor)) && 91 ((id->match_flag_int_class) || 92 (id->match_flag_int_subclass) || 93 (id->match_flag_int_protocol))) { 94 continue; 95 } 96 if ((id->match_flag_int_class) && 97 (id->bInterfaceClass != info->bInterfaceClass)) { 98 continue; 99 } 100 if ((id->match_flag_int_subclass) && 101 (id->bInterfaceSubClass != info->bInterfaceSubClass)) { 102 continue; 103 } 104 if ((id->match_flag_int_protocol) && 105 (id->bInterfaceProtocol != info->bInterfaceProtocol)) { 106 continue; 107 } 108 /* We found a match! */ 109 return (id); 110 } 111 112 done: 113 return (NULL); 114 } 115 116 /*------------------------------------------------------------------------* 117 * usb2_lookup_id_by_uaa - factored out code 118 * 119 * Return values: 120 * 0: Success 121 * Else: Failure 122 *------------------------------------------------------------------------*/ 123 int 124 usb2_lookup_id_by_uaa(const struct usb2_device_id *id, uint32_t sizeof_id, 125 struct usb2_attach_arg *uaa) 126 { 127 id = usb2_lookup_id_by_info(id, sizeof_id, &uaa->info); 128 if (id) { 129 /* copy driver info */ 130 uaa->driver_info = id->driver_info; 131 return (0); 132 } 133 return (ENXIO); 134 } 135