diff options
Diffstat (limited to 'sys/dev/usb/usb_lookup.c')
| -rw-r--r-- | sys/dev/usb/usb_lookup.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/sys/dev/usb/usb_lookup.c b/sys/dev/usb/usb_lookup.c new file mode 100644 index 000000000000..a8fa271ffb37 --- /dev/null +++ b/sys/dev/usb/usb_lookup.c @@ -0,0 +1,134 @@ +/* $FreeBSD$ */ +/*- + * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <dev/usb/usb_core.h> +#include <dev/usb/usb_lookup.h> + +/*------------------------------------------------------------------------* + * usb2_lookup_id_by_info + * + * This functions takes an array of "struct usb2_device_id" and tries + * to match the entries with the information in "struct usb2_lookup_info". + * + * NOTE: The "sizeof_id" parameter must be a multiple of the + * usb2_device_id structure size. Else the behaviour of this function + * is undefined. + * + * Return values: + * NULL: No match found. + * Else: Pointer to matching entry. + *------------------------------------------------------------------------*/ +const struct usb2_device_id * +usb2_lookup_id_by_info(const struct usb2_device_id *id, uint32_t sizeof_id, + const struct usb2_lookup_info *info) +{ + const struct usb2_device_id *id_end; + + if (id == NULL) { + goto done; + } + id_end = (const void *)(((const uint8_t *)id) + sizeof_id); + + /* + * Keep on matching array entries until we find a match or + * until we reach the end of the matching array: + */ + for (; id != id_end; id++) { + + if ((id->match_flag_vendor) && + (id->idVendor != info->idVendor)) { + continue; + } + if ((id->match_flag_product) && + (id->idProduct != info->idProduct)) { + continue; + } + if ((id->match_flag_dev_lo) && + (id->bcdDevice_lo > info->bcdDevice)) { + continue; + } + if ((id->match_flag_dev_hi) && + (id->bcdDevice_hi < info->bcdDevice)) { + continue; + } + if ((id->match_flag_dev_class) && + (id->bDeviceClass != info->bDeviceClass)) { + continue; + } + if ((id->match_flag_dev_subclass) && + (id->bDeviceSubClass != info->bDeviceSubClass)) { + continue; + } + if ((id->match_flag_dev_protocol) && + (id->bDeviceProtocol != info->bDeviceProtocol)) { + continue; + } + if ((info->bDeviceClass == 0xFF) && + (!(id->match_flag_vendor)) && + ((id->match_flag_int_class) || + (id->match_flag_int_subclass) || + (id->match_flag_int_protocol))) { + continue; + } + if ((id->match_flag_int_class) && + (id->bInterfaceClass != info->bInterfaceClass)) { + continue; + } + if ((id->match_flag_int_subclass) && + (id->bInterfaceSubClass != info->bInterfaceSubClass)) { + continue; + } + if ((id->match_flag_int_protocol) && + (id->bInterfaceProtocol != info->bInterfaceProtocol)) { + continue; + } + /* We found a match! */ + return (id); + } + +done: + return (NULL); +} + +/*------------------------------------------------------------------------* + * usb2_lookup_id_by_uaa - factored out code + * + * Return values: + * 0: Success + * Else: Failure + *------------------------------------------------------------------------*/ +int +usb2_lookup_id_by_uaa(const struct usb2_device_id *id, uint32_t sizeof_id, + struct usb2_attach_arg *uaa) +{ + id = usb2_lookup_id_by_info(id, sizeof_id, &uaa->info); + if (id) { + /* copy driver info */ + uaa->driver_info = id->driver_info; + return (0); + } + return (ENXIO); +} |