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 46 int 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 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 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 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 172 hid_dispose_report_desc(report_desc_t r) 173 { 174 175 free(r); 176 } 177