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/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 48 int 49 hid_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 60 int 61 hid_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 86 use_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 98 report_desc_t 99 hid_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 = 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 = 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 } 157 158 report_desc_t 159 hid_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 } 172 173 void 174 hid_dispose_report_desc(report_desc_t r) 175 { 176 177 free(r); 178 } 179