1/*	$NetBSD: descr.c,v 1.9 2000/09/24 02:13:24 augustss Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
5 *
6 * Copyright (c) 1999 Lennart Augustsson <augustss@netbsd.org>
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD$");
33
34#include <sys/types.h>
35
36#include <assert.h>
37#include <errno.h>
38#include <stdlib.h>
39#include <string.h>
40#include <unistd.h>
41#include <sys/time.h>
42#include <sys/ioctl.h>
43#include <dev/usb/usb_ioctl.h>
44
45#include "usbhid.h"
46#include "usbvar.h"
47
48int
49hid_set_immed(int fd, int enable)
50{
51	int ret;
52	ret = ioctl(fd, USB_SET_IMMED, &enable);
53#ifdef HID_COMPAT7
54	if (ret < 0)
55		ret = hid_set_immed_compat7(fd, enable);
56#endif
57	return (ret);
58}
59
60int
61hid_get_report_id(int fd)
62{
63	report_desc_t rep;
64	hid_data_t d;
65	hid_item_t h;
66	int kindset;
67	int temp = -1;
68	int ret;
69
70	if ((rep = hid_get_report_desc(fd)) == NULL)
71		goto use_ioctl;
72	kindset = 1 << hid_input | 1 << hid_output | 1 << hid_feature;
73	for (d = hid_start_parse(rep, kindset, -1); hid_get_item(d, &h); ) {
74		/* Return the first report ID we met. */
75		if (h.report_ID != 0) {
76			temp = h.report_ID;
77			break;
78		}
79	}
80	hid_end_parse(d);
81	hid_dispose_report_desc(rep);
82
83	if (temp > 0)
84		return (temp);
85
86use_ioctl:
87	ret = ioctl(fd, USB_GET_REPORT_ID, &temp);
88#ifdef HID_COMPAT7
89	if (ret < 0)
90		ret = hid_get_report_id_compat7(fd);
91	else
92#endif
93		ret = temp;
94
95	return (ret);
96}
97
98report_desc_t
99hid_get_report_desc(int fd)
100{
101	struct usb_gen_descriptor ugd;
102	report_desc_t rep;
103	void *data;
104
105	memset(&ugd, 0, sizeof(ugd));
106
107	/* get actual length first */
108	ugd.ugd_data = hid_pass_ptr(NULL);
109	ugd.ugd_maxlen = 65535;
110	if (ioctl(fd, USB_GET_REPORT_DESC, &ugd) < 0) {
111#ifdef HID_COMPAT7
112		/* could not read descriptor */
113		/* try FreeBSD 7 compat code */
114		return (hid_get_report_desc_compat7(fd));
115#else
116		return (NULL);
117#endif
118	}
119
120	/*
121	 * NOTE: The kernel will return a failure if
122	 * "ugd_actlen" is zero.
123	 */
124	data = malloc(ugd.ugd_actlen);
125	if (data == NULL)
126		return (NULL);
127
128	/* fetch actual descriptor */
129	ugd.ugd_data = hid_pass_ptr(data);
130	ugd.ugd_maxlen = ugd.ugd_actlen;
131	if (ioctl(fd, USB_GET_REPORT_DESC, &ugd) < 0) {
132		/* could not read descriptor */
133		free(data);
134		return (NULL);
135	}
136
137	/* sanity check */
138	if (ugd.ugd_actlen < 1) {
139		/* invalid report descriptor */
140		free(data);
141		return (NULL);
142	}
143
144	/* check END_COLLECTION */
145	if (((unsigned char *)data)[ugd.ugd_actlen -1] != 0xC0) {
146		/* invalid end byte */
147		free(data);
148		return (NULL);
149	}
150
151	rep = hid_use_report_desc(data, ugd.ugd_actlen);
152
153	free(data);
154
155	return (rep);
156}
157
158report_desc_t
159hid_use_report_desc(unsigned char *data, unsigned int size)
160{
161	report_desc_t r;
162
163	r = malloc(sizeof(*r) + size);
164	if (r == NULL) {
165		errno = ENOMEM;
166		return (NULL);
167	}
168	r->size = size;
169	memcpy(r->data, data, size);
170	return (r);
171}
172
173void
174hid_dispose_report_desc(report_desc_t r)
175{
176
177	free(r);
178}
179