sys/dev/usb/usb_lookup.c

   1 /* $FreeBSD$ */
   2 /*-
   3  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   4  *
   5  * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #ifdef USB_GLOBAL_INCLUDE_FILE
  30 #include USB_GLOBAL_INCLUDE_FILE
  31 #else
  32 #include <sys/stdint.h>
  33 #include <sys/stddef.h>
  34 #include <sys/param.h>
  35 #include <sys/queue.h>
  36 #include <sys/types.h>
  37 #include <sys/systm.h>
  38 #include <sys/kernel.h>
  39 #include <sys/bus.h>
  40 #include <sys/module.h>
  41 #include <sys/lock.h>
  42 #include <sys/mutex.h>
  43 #include <sys/condvar.h>
  44 #include <sys/sysctl.h>
  45 #include <sys/sx.h>
  46 #include <sys/unistd.h>
  47 #include <sys/callout.h>
  48 #include <sys/malloc.h>
  49 #include <sys/priv.h>
  50 #include <sys/limits.h>
  51 #include <sys/endian.h>
  52
  53 #include <dev/usb/usb.h>
  54 #include <dev/usb/usbdi.h>
  55 #endif                  /* USB_GLOBAL_INCLUDE_FILE */
  56
  57 /*------------------------------------------------------------------------*
  58  *      usbd_lookup_id_by_info
  59  *
  60  * This functions takes an array of "struct usb_device_id" and tries
  61  * to match the entries with the information in "struct usbd_lookup_info".
  62  *
  63  * NOTE: The "sizeof_id" parameter must be a multiple of the
  64  * usb_device_id structure size. Else the behaviour of this function
  65  * is undefined.
  66  *
  67  * Return values:
  68  * NULL: No match found.
  69  * Else: Pointer to matching entry.
  70  *------------------------------------------------------------------------*/
  71 const struct usb_device_id *
  72 usbd_lookup_id_by_info(const struct usb_device_id *id, usb_size_t sizeof_id,
  73     const struct usbd_lookup_info *info)
  74 {
  75         const struct usb_device_id *id_end;
  76
  77         if (id == NULL) {
  78                 goto done;
  79         }
  80         id_end = (const void *)(((const uint8_t *)id) + sizeof_id);
  81
  82         /*
  83          * Keep on matching array entries until we find a match or
  84          * until we reach the end of the matching array:
  85          */
  86         for (; id != id_end; id++) {
  87
  88                 if ((id->match_flag_vendor) &&
  89                     (id->idVendor != info->idVendor)) {
  90                         continue;
  91                 }
  92                 if ((id->match_flag_product) &&
  93                     (id->idProduct != info->idProduct)) {
  94                         continue;
  95                 }
  96                 if ((id->match_flag_dev_lo) &&
  97                     (id->bcdDevice_lo > info->bcdDevice)) {
  98                         continue;
  99                 }
 100                 if ((id->match_flag_dev_hi) &&
 101                     (id->bcdDevice_hi < info->bcdDevice)) {
 102                         continue;
 103                 }
 104                 if ((id->match_flag_dev_class) &&
 105                     (id->bDeviceClass != info->bDeviceClass)) {
 106                         continue;
 107                 }
 108                 if ((id->match_flag_dev_subclass) &&
 109                     (id->bDeviceSubClass != info->bDeviceSubClass)) {
 110                         continue;
 111                 }
 112                 if ((id->match_flag_dev_protocol) &&
 113                     (id->bDeviceProtocol != info->bDeviceProtocol)) {
 114                         continue;
 115                 }
 116                 if ((id->match_flag_int_class) &&
 117                     (id->bInterfaceClass != info->bInterfaceClass)) {
 118                         continue;
 119                 }
 120                 if ((id->match_flag_int_subclass) &&
 121                     (id->bInterfaceSubClass != info->bInterfaceSubClass)) {
 122                         continue;
 123                 }
 124                 if ((id->match_flag_int_protocol) &&
 125                     (id->bInterfaceProtocol != info->bInterfaceProtocol)) {
 126                         continue;
 127                 }
 128                 /* We found a match! */
 129                 return (id);
 130         }
 131
 132 done:
 133         return (NULL);
 134 }
 135
 136 /*------------------------------------------------------------------------*
 137  *      usbd_lookup_id_by_uaa - factored out code
 138  *
 139  * Return values:
 140  *    0: Success
 141  * Else: Failure
 142  *------------------------------------------------------------------------*/
 143 int
 144 usbd_lookup_id_by_uaa(const struct usb_device_id *id, usb_size_t sizeof_id,
 145     struct usb_attach_arg *uaa)
 146 {
 147         id = usbd_lookup_id_by_info(id, sizeof_id, &uaa->info);
 148         if (id) {
 149                 /* copy driver info */
 150                 uaa->driver_info = id->driver_info;
 151                 return (0);
 152         }
 153         return (ENXIO);
 154 }
 155