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 42 #include <dev/usb/usb_ioctl.h> 43 44 #include "usbhid.h" 45 #include "usbvar.h" 46 47 int 48 hid_set_immed(int fd, int enable) 49 { 50 int ret; 51 ret = ioctl(fd, USB_SET_IMMED, &enable); 52 #ifdef HID_COMPAT7 53 if (ret < 0) 54 ret = hid_set_immed_compat7(fd, enable); 55 #endif 56 return (ret); 57 } 58 59 int 60 hid_get_report_id(int fd) 61 { 62 int temp = -1; 63 int ret; 64 65 ret = ioctl(fd, USB_GET_REPORT_ID, &temp); 66 #ifdef HID_COMPAT7 67 if (ret < 0) 68 ret = hid_get_report_id_compat7(fd); 69 else 70 #endif 71 ret = temp; 72 73 return (ret); 74 } 75 76 report_desc_t 77 hid_get_report_desc(int fd) 78 { 79 struct usb2_gen_descriptor ugd; 80 report_desc_t rep; 81 void *data; 82 83 memset(&ugd, 0, sizeof(ugd)); 84 85 /* get actual length first */ 86 ugd.ugd_data = NULL; 87 ugd.ugd_maxlen = 65535; 88 if (ioctl(fd, USB_GET_REPORT_DESC, &ugd) < 0) { 89 #ifdef HID_COMPAT7 90 /* could not read descriptor */ 91 /* try FreeBSD 7 compat code */ 92 return (hid_get_report_desc_compat7(fd)); 93 #else 94 return (NULL); 95 #endif 96 } 97 98 /* 99 * NOTE: The kernel will return a failure if 100 * "ugd_actlen" is zero. 101 */ 102 data = malloc(ugd.ugd_actlen); 103 if (data == NULL) 104 return (NULL); 105 106 /* fetch actual descriptor */ 107 ugd.ugd_data = data; 108 ugd.ugd_maxlen = ugd.ugd_actlen; 109 if (ioctl(fd, USB_GET_REPORT_DESC, &ugd) < 0) { 110 /* could not read descriptor */ 111 free(data); 112 return (NULL); 113 } 114 115 /* check END_COLLECTION */ 116 if (((unsigned char *)ugd.ugd_data)[ugd.ugd_actlen -1] != 0xC0) { 117 /* invalid end byte */ 118 free(data); 119 return (NULL); 120 } 121 122 rep = hid_use_report_desc(data, ugd.ugd_actlen); 123 124 free(data); 125 126 return (rep); 127 } 128 129 report_desc_t 130 hid_use_report_desc(unsigned char *data, unsigned int size) 131 { 132 report_desc_t r; 133 134 r = malloc(sizeof(*r) + size); 135 if (r == 0) { 136 errno = ENOMEM; 137 return (NULL); 138 } 139 r->size = size; 140 memcpy(r->data, data, size); 141 return (r); 142 } 143 144 void 145 hid_dispose_report_desc(report_desc_t r) 146 { 147 148 free(r); 149 } 150