1 /* $OpenBSD: descr.c,v 1.5 2012/07/11 13:43:54 yuo Exp $ */ 2 /* $NetBSD: descr.c,v 1.2 2002/02/20 20:31:07 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1999 Lennart Augustsson <augustss@netbsd.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/types.h> 31 32 #include <errno.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <unistd.h> 36 #include <sys/time.h> 37 38 #include <dev/usb/usb.h> 39 40 #include "usbhid.h" 41 #include "usbvar.h" 42 43 int 44 hid_get_report_id(int fd) 45 { 46 report_desc_t rep; 47 hid_data_t d; 48 hid_item_t h; 49 int kindset; 50 int temp = -1; 51 int ret = -1; 52 53 if ((rep = hid_get_report_desc(fd)) == NULL) 54 goto use_ioctl; 55 kindset = 1 << hid_input | 1 << hid_output | 1 << hid_feature; 56 for (d = hid_start_parse(rep, kindset, 0); hid_get_item(d, &h); ) { 57 /* Return the first report ID we met. */ 58 if (h.report_ID != 0) { 59 temp = h.report_ID; 60 break; 61 } 62 } 63 hid_end_parse(d); 64 hid_dispose_report_desc(rep); 65 66 if (temp >0) 67 return (temp); 68 69 use_ioctl: 70 if(ioctl(fd, USB_GET_REPORT_ID, &temp) < 0) 71 return 0; 72 else 73 ret = temp; 74 75 76 return (ret); 77 } 78 79 report_desc_t 80 hid_get_report_desc(int fd) 81 { 82 struct usb_ctl_report_desc rep; 83 84 memset(&rep, 0, sizeof(rep)); 85 86 if (ioctl(fd, USB_GET_REPORT_DESC, &rep) < 0) 87 return (NULL); 88 89 /* check END_COLLECTION */ 90 if (((unsigned char *)rep.ucrd_data)[rep.ucrd_size -1] != 0xc0) { 91 return (NULL); 92 } 93 94 return hid_use_report_desc(rep.ucrd_data, (unsigned int)rep.ucrd_size); 95 } 96 97 report_desc_t 98 hid_use_report_desc(unsigned char *data, unsigned int size) 99 { 100 report_desc_t r; 101 102 r = malloc(sizeof(*r) + size); 103 if (r == NULL) 104 return (NULL); 105 r->size = size; 106 memcpy(r->data, data, size); 107 return (r); 108 } 109 110 void 111 hid_dispose_report_desc(report_desc_t r) 112 { 113 114 free(r); 115 } 116