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: stable/9/lib/libusbhid/descr.c 243058 2012-11-15 05:44:44Z mav $");
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
46 int
hid_set_immed(int fd,int enable)47 hid_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
58 int
hid_get_report_id(int fd)59 hid_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
84 use_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
96 report_desc_t
hid_get_report_desc(int fd)97 hid_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
156 report_desc_t
hid_use_report_desc(unsigned char * data,unsigned int size)157 hid_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
171 void
hid_dispose_report_desc(report_desc_t r)172 hid_dispose_report_desc(report_desc_t r)
173 {
174
175 free(r);
176 }
177