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