1/*	$NetBSD: descr.c,v 1.9 2000/09/24 02:13:24 augustss Exp $	*/
2
3/*
4 * Copyright (c) 1999 Lennart Augustsson <augustss@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/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#include <sys/types.h>
33
34#include <assert.h>
35#include <errno.h>
36#include <stdlib.h>
37#include <string.h>
38#include <unistd.h>
39#include <sys/time.h>
40#include <sys/ioctl.h>
41#include <dev/usb/usb_ioctl.h>
42
43#include "usbhid.h"
44#include "usbvar.h"
45
46int
47hid_set_immed(int fd, int enable)
48{
49	int ret;
50	ret = ioctl(fd, USB_SET_IMMED, &enable);
51#ifdef HID_COMPAT7
52	if (ret < 0)
53		ret = hid_set_immed_compat7(fd, enable);
54#endif
55	return (ret);
56}
57
58int
59hid_get_report_id(int fd)
60{
61	report_desc_t rep;
62	hid_data_t d;
63	hid_item_t h;
64	int kindset;
65	int temp = -1;
66	int ret;
67
68	if ((rep = hid_get_report_desc(fd)) == NULL)
69		goto use_ioctl;
70	kindset = 1 << hid_input | 1 << hid_output | 1 << hid_feature;
71	for (d = hid_start_parse(rep, kindset, -1); hid_get_item(d, &h); ) {
72		/* Return the first report ID we met. */
73		if (h.report_ID != 0) {
74			temp = h.report_ID;
75			break;
76		}
77	}
78	hid_end_parse(d);
79	hid_dispose_report_desc(rep);
80
81	if (temp > 0)
82		return (temp);
83
84use_ioctl:
85	ret = ioctl(fd, USB_GET_REPORT_ID, &temp);
86#ifdef HID_COMPAT7
87	if (ret < 0)
88		ret = hid_get_report_id_compat7(fd);
89	else
90#endif
91		ret = temp;
92
93	return (ret);
94}
95
96report_desc_t
97hid_get_report_desc(int fd)
98{
99	struct usb_gen_descriptor ugd;
100	report_desc_t rep;
101	void *data;
102
103	memset(&ugd, 0, sizeof(ugd));
104
105	/* get actual length first */
106	ugd.ugd_data = hid_pass_ptr(NULL);
107	ugd.ugd_maxlen = 65535;
108	if (ioctl(fd, USB_GET_REPORT_DESC, &ugd) < 0) {
109#ifdef HID_COMPAT7
110		/* could not read descriptor */
111		/* try FreeBSD 7 compat code */
112		return (hid_get_report_desc_compat7(fd));
113#else
114		return (NULL);
115#endif
116	}
117
118	/*
119	 * NOTE: The kernel will return a failure if
120	 * "ugd_actlen" is zero.
121	 */
122	data = malloc(ugd.ugd_actlen);
123	if (data == NULL)
124		return (NULL);
125
126	/* fetch actual descriptor */
127	ugd.ugd_data = hid_pass_ptr(data);
128	ugd.ugd_maxlen = ugd.ugd_actlen;
129	if (ioctl(fd, USB_GET_REPORT_DESC, &ugd) < 0) {
130		/* could not read descriptor */
131		free(data);
132		return (NULL);
133	}
134
135	/* sanity check */
136	if (ugd.ugd_actlen < 1) {
137		/* invalid report descriptor */
138		free(data);
139		return (NULL);
140	}
141
142	/* check END_COLLECTION */
143	if (((unsigned char *)data)[ugd.ugd_actlen -1] != 0xC0) {
144		/* invalid end byte */
145		free(data);
146		return (NULL);
147	}
148
149	rep = hid_use_report_desc(data, ugd.ugd_actlen);
150
151	free(data);
152
153	return (rep);
154}
155
156report_desc_t
157hid_use_report_desc(unsigned char *data, unsigned int size)
158{
159	report_desc_t r;
160
161	r = malloc(sizeof(*r) + size);
162	if (r == 0) {
163		errno = ENOMEM;
164		return (NULL);
165	}
166	r->size = size;
167	memcpy(r->data, data, size);
168	return (r);
169}
170
171void
172hid_dispose_report_desc(report_desc_t r)
173{
174
175	free(r);
176}
177