1 /* $NetBSD: data.c,v 1.8 2000/04/02 11:10:53 augustss Exp $ */
4 * Copyright (c) 1999 Lennart Augustsson <augustss@netbsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
28 * $FreeBSD: head/lib/libusbhid/data.c 225839 2011-09-28 14:52:25Z mav $
31 #include <sys/param.h>
35 #include <bus/u4b/usb_ioctl.h>
40 hid_get_data(const void *p, const hid_item_t *h)
50 /* Skip report ID byte. */
54 hpos = h->pos; /* bit position of data */
55 hsize = h->report_size; /* bit length of data */
57 /* Range check and limit */
64 end = (hpos + hsize) / 8 - offs;
66 for (i = 0; i <= end; i++)
67 data |= buf[offs + i] << (i*8);
69 /* Correctly shift down data */
73 /* Mask and sign extend in one */
74 if ((h->logical_minimum < 0) || (h->logical_maximum < 0))
75 data = (int32_t)((int32_t)data << hsize) >> hsize;
77 data = (uint32_t)((uint32_t)data << hsize) >> hsize;
83 hid_set_data(void *p, const hid_item_t *h, int32_t data)
95 /* Set report ID byte. */
97 *buf++ = h->report_ID & 0xff;
99 hpos = h->pos; /* bit position of data */
100 hsize = h->report_size; /* bit length of data */
103 mask = (1 << hsize) - 1;
113 end = (hpos + hsize) / 8 - offs;
115 for (i = 0; i <= end; i++)
116 buf[offs + i] = (buf[offs + i] & (mask >> (i*8))) |
117 ((data >> (i*8)) & 0xff);
121 hid_get_report(int fd, enum hid_kind k, unsigned char *data, unsigned int size)
123 struct usb_gen_descriptor ugd;
125 memset(&ugd, 0, sizeof(ugd));
126 ugd.ugd_data = hid_pass_ptr(data);
127 ugd.ugd_maxlen = size;
128 ugd.ugd_report_type = k + 1;
129 return (ioctl(fd, USB_GET_REPORT, &ugd));
133 hid_set_report(int fd, enum hid_kind k, unsigned char *data, unsigned int size)
135 struct usb_gen_descriptor ugd;
137 memset(&ugd, 0, sizeof(ugd));
138 ugd.ugd_data = hid_pass_ptr(data);
139 ugd.ugd_maxlen = size;
140 ugd.ugd_report_type = k + 1;
141 return (ioctl(fd, USB_SET_REPORT, &ugd));