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/types.h> 30 31 #include <assert.h> 32 #include <errno.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <unistd.h> 36 #include <sys/time.h> 37 #include <sys/ioctl.h> 38 #include <bus/u4b/usb_ioctl.h> 39 40 #include "usbhid.h" 41 #include "usbvar.h" 42 43 int 44 hid_set_immed(int fd, int enable) 45 { 46 int ret; 47 ret = ioctl(fd, USB_SET_IMMED, &enable); 48 #ifdef HID_COMPAT7 49 if (ret < 0) 50 ret = hid_set_immed_compat7(fd, enable); 51 #endif 52 return (ret); 53 } 54 55 int 56 hid_get_report_id(int fd) 57 { 58 report_desc_t rep; 59 hid_data_t d; 60 hid_item_t h; 61 int kindset; 62 int temp = -1; 63 int ret; 64 65 if ((rep = hid_get_report_desc(fd)) == NULL) 66 goto use_ioctl; 67 kindset = 1 << hid_input | 1 << hid_output | 1 << hid_feature; 68 for (d = hid_start_parse(rep, kindset, 0); hid_get_item(d, &h); ) { 69 /* Return the first report ID we met. */ 70 if (h.report_ID != 0) { 71 temp = h.report_ID; 72 break; 73 } 74 } 75 hid_end_parse(d); 76 hid_dispose_report_desc(rep); 77 78 if (temp > 0) 79 return (temp); 80 81 use_ioctl: 82 ret = ioctl(fd, USB_GET_REPORT_ID, &temp); 83 #ifdef HID_COMPAT7 84 if (ret < 0) 85 ret = hid_get_report_id_compat7(fd); 86 else 87 #endif 88 ret = temp; 89 90 return (ret); 91 } 92 93 report_desc_t 94 hid_get_report_desc(int fd) 95 { 96 struct usb_gen_descriptor ugd; 97 report_desc_t rep; 98 void *data; 99 100 memset(&ugd, 0, sizeof(ugd)); 101 102 /* get actual length first */ 103 ugd.ugd_data = hid_pass_ptr(NULL); 104 ugd.ugd_maxlen = 65535; 105 if (ioctl(fd, USB_GET_REPORT_DESC, &ugd) < 0) { 106 #ifdef HID_COMPAT7 107 /* could not read descriptor */ 108 /* try FreeBSD 7 compat code */ 109 return (hid_get_report_desc_compat7(fd)); 110 #else 111 return (NULL); 112 #endif 113 } 114 115 /* 116 * NOTE: The kernel will return a failure if 117 * "ugd_actlen" is zero. 118 */ 119 data = malloc(ugd.ugd_actlen); 120 if (data == NULL) 121 return (NULL); 122 123 /* fetch actual descriptor */ 124 ugd.ugd_data = hid_pass_ptr(data); 125 ugd.ugd_maxlen = ugd.ugd_actlen; 126 if (ioctl(fd, USB_GET_REPORT_DESC, &ugd) < 0) { 127 /* could not read descriptor */ 128 free(data); 129 return (NULL); 130 } 131 132 /* sanity check */ 133 if (ugd.ugd_actlen < 1) { 134 /* invalid report descriptor */ 135 free(data); 136 return (NULL); 137 } 138 139 /* check END_COLLECTION */ 140 if (((unsigned char *)data)[ugd.ugd_actlen -1] != 0xC0) { 141 /* invalid end byte */ 142 free(data); 143 return (NULL); 144 } 145 146 rep = hid_use_report_desc(data, ugd.ugd_actlen); 147 148 free(data); 149 150 return (rep); 151 } 152 153 report_desc_t 154 hid_use_report_desc(unsigned char *data, unsigned int size) 155 { 156 report_desc_t r; 157 158 r = malloc(sizeof(*r) + size); 159 if (r == 0) { 160 errno = ENOMEM; 161 return (NULL); 162 } 163 r->size = size; 164 memcpy(r->data, data, size); 165 return (r); 166 } 167 168 void 169 hid_dispose_report_desc(report_desc_t r) 170 { 171 172 free(r); 173 } 174