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descr.c revision 1.2 
      1 /*	$NetBSD: descr.c,v 1.2 2002/02/20 20:31:07 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1999 Lennart Augustsson <augustss (at) netbsd.org>
      5  * 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 #include <sys/types.h>
     30 
     31 #include <assert.h>
     32 #include <errno.h>
     33 #include <stdlib.h>
     34 #include <string.h>
     35 #include <unistd.h>
     36 #include <sys/time.h>
     37 
     38 #include <dev/usb/usb.h>
     39 
     40 #include "usbhid.h"
     41 #include "usbvar.h"
     42 
     43 report_desc_t
     44 hid_get_report_desc(int fd)
     45 {
     46 	struct usb_ctl_report_desc rep;
     47 
     48 	_DIAGASSERT(fd != -1);
     49 
     50 	rep.ucrd_size = 0;
     51 	if (ioctl(fd, USB_GET_REPORT_DESC, &rep) < 0)
     52 		return (NULL);
     53 
     54 	return hid_use_report_desc(rep.ucrd_data, (unsigned int)rep.ucrd_size);
     55 }
     56 
     57 report_desc_t
     58 hid_use_report_desc(unsigned char *data, unsigned int size)
     59 {
     60 	report_desc_t r;
     61 
     62 	r = malloc(sizeof(*r) + size);
     63 	if (r == 0) {
     64 		errno = ENOMEM;
     65 		return (NULL);
     66 	}
     67 	r->size = size;
     68 	memcpy(r->data, data, size);
     69 	return (r);
     70 }
     71 
     72 void
     73 hid_dispose_report_desc(report_desc_t r)
     74 {
     75 
     76 	free(r);
     77 }
     78