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