135 lines
4.2 KiB
C
135 lines
4.2 KiB
C
/* $FreeBSD$ */
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/*-
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* Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <dev/usb/usb_core.h>
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#include <dev/usb/usb_lookup.h>
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/*------------------------------------------------------------------------*
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* usb2_lookup_id_by_info
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*
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* This functions takes an array of "struct usb_device_id" and tries
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* to match the entries with the information in "struct usb_lookup_info".
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*
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* NOTE: The "sizeof_id" parameter must be a multiple of the
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* usb_device_id structure size. Else the behaviour of this function
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* is undefined.
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*
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* Return values:
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* NULL: No match found.
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* Else: Pointer to matching entry.
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*------------------------------------------------------------------------*/
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const struct usb_device_id *
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usb2_lookup_id_by_info(const struct usb_device_id *id, usb_size_t sizeof_id,
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const struct usb_lookup_info *info)
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{
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const struct usb_device_id *id_end;
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if (id == NULL) {
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goto done;
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}
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id_end = (const void *)(((const uint8_t *)id) + sizeof_id);
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/*
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* Keep on matching array entries until we find a match or
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* until we reach the end of the matching array:
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*/
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for (; id != id_end; id++) {
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if ((id->match_flag_vendor) &&
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(id->idVendor != info->idVendor)) {
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continue;
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}
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if ((id->match_flag_product) &&
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(id->idProduct != info->idProduct)) {
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continue;
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}
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if ((id->match_flag_dev_lo) &&
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(id->bcdDevice_lo > info->bcdDevice)) {
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continue;
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}
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if ((id->match_flag_dev_hi) &&
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(id->bcdDevice_hi < info->bcdDevice)) {
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continue;
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}
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if ((id->match_flag_dev_class) &&
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(id->bDeviceClass != info->bDeviceClass)) {
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continue;
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}
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if ((id->match_flag_dev_subclass) &&
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(id->bDeviceSubClass != info->bDeviceSubClass)) {
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continue;
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}
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if ((id->match_flag_dev_protocol) &&
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(id->bDeviceProtocol != info->bDeviceProtocol)) {
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continue;
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}
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if ((info->bDeviceClass == 0xFF) &&
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(!(id->match_flag_vendor)) &&
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((id->match_flag_int_class) ||
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(id->match_flag_int_subclass) ||
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(id->match_flag_int_protocol))) {
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continue;
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}
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if ((id->match_flag_int_class) &&
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(id->bInterfaceClass != info->bInterfaceClass)) {
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continue;
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}
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if ((id->match_flag_int_subclass) &&
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(id->bInterfaceSubClass != info->bInterfaceSubClass)) {
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continue;
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}
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if ((id->match_flag_int_protocol) &&
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(id->bInterfaceProtocol != info->bInterfaceProtocol)) {
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continue;
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}
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/* We found a match! */
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return (id);
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}
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done:
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return (NULL);
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}
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/*------------------------------------------------------------------------*
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* usb2_lookup_id_by_uaa - factored out code
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*
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* Return values:
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* 0: Success
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* Else: Failure
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*------------------------------------------------------------------------*/
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int
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usb2_lookup_id_by_uaa(const struct usb_device_id *id, usb_size_t sizeof_id,
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struct usb_attach_arg *uaa)
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{
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id = usb2_lookup_id_by_info(id, sizeof_id, &uaa->info);
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if (id) {
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/* copy driver info */
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uaa->driver_info = id->driver_info;
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return (0);
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}
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return (ENXIO);
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}
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