| 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 | } |