1 /* $NetBSD: data.c,v 1.8 2000/04/02 11:10:53 augustss Exp $ */
4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
6 * Copyright (c) 1999 Lennart Augustsson <augustss@netbsd.org>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
38 #include <dev/usb/usb_ioctl.h>
43 hid_get_data(const void *p, const hid_item_t *h)
53 /* Skip report ID byte. */
57 hpos = h->pos; /* bit position of data */
58 hsize = h->report_size; /* bit length of data */
60 /* Range check and limit */
67 end = (hpos + hsize) / 8 - offs;
69 for (i = 0; i <= end; i++)
70 data |= buf[offs + i] << (i*8);
72 /* Correctly shift down data */
76 /* Mask and sign extend in one */
77 if ((h->logical_minimum < 0) || (h->logical_maximum < 0))
78 data = (int32_t)((int32_t)data << hsize) >> hsize;
80 data = (uint32_t)((uint32_t)data << hsize) >> hsize;
86 hid_set_data(void *p, const hid_item_t *h, int32_t data)
98 /* Set report ID byte. */
100 *buf++ = h->report_ID & 0xff;
102 hpos = h->pos; /* bit position of data */
103 hsize = h->report_size; /* bit length of data */
106 mask = (1 << hsize) - 1;
116 end = (hpos + hsize) / 8 - offs;
118 for (i = 0; i <= end; i++)
119 buf[offs + i] = (buf[offs + i] & (mask >> (i*8))) |
120 ((data >> (i*8)) & 0xff);
124 hid_get_report(int fd, enum hid_kind k, unsigned char *data, unsigned int size)
126 struct usb_gen_descriptor ugd;
128 memset(&ugd, 0, sizeof(ugd));
129 ugd.ugd_data = hid_pass_ptr(data);
130 ugd.ugd_maxlen = size;
131 ugd.ugd_report_type = k + 1;
132 return (ioctl(fd, USB_GET_REPORT, &ugd));
136 hid_set_report(int fd, enum hid_kind k, unsigned char *data, unsigned int size)
138 struct usb_gen_descriptor ugd;
140 memset(&ugd, 0, sizeof(ugd));
141 ugd.ugd_data = hid_pass_ptr(data);
142 ugd.ugd_maxlen = size;
143 ugd.ugd_report_type = k + 1;
144 return (ioctl(fd, USB_SET_REPORT, &ugd));