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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
36 #include <dev/usb/usb_ioctl.h>
41 hid_get_data(const void *p, const hid_item_t *h)
51 /* Skip report ID byte. */
55 hpos = h->pos; /* bit position of data */
56 hsize = h->report_size; /* bit length of data */
58 /* Range check and limit */
65 end = (hpos + hsize) / 8 - offs;
67 for (i = 0; i <= end; i++)
68 data |= buf[offs + i] << (i*8);
70 /* Correctly shift down data */
74 /* Mask and sign extend in one */
75 if ((h->logical_minimum < 0) || (h->logical_maximum < 0))
76 data = (int32_t)((int32_t)data << hsize) >> hsize;
78 data = (uint32_t)((uint32_t)data << hsize) >> hsize;
84 hid_set_data(void *p, const hid_item_t *h, int32_t data)
96 /* Set report ID byte. */
98 *buf++ = h->report_ID & 0xff;
100 hpos = h->pos; /* bit position of data */
101 hsize = h->report_size; /* bit length of data */
104 mask = (1 << hsize) - 1;
114 end = (hpos + hsize) / 8 - offs;
116 for (i = 0; i <= end; i++)
117 buf[offs + i] = (buf[offs + i] & (mask >> (i*8))) |
118 ((data >> (i*8)) & 0xff);
122 hid_get_report(int fd, enum hid_kind k, unsigned char *data, unsigned int size)
124 struct usb_gen_descriptor ugd;
126 memset(&ugd, 0, sizeof(ugd));
127 ugd.ugd_data = hid_pass_ptr(data);
128 ugd.ugd_maxlen = size;
129 ugd.ugd_report_type = k + 1;
130 return (ioctl(fd, USB_GET_REPORT, &ugd));
134 hid_set_report(int fd, enum hid_kind k, unsigned char *data, unsigned int size)
136 struct usb_gen_descriptor ugd;
138 memset(&ugd, 0, sizeof(ugd));
139 ugd.ugd_data = hid_pass_ptr(data);
140 ugd.ugd_maxlen = size;
141 ugd.ugd_report_type = k + 1;
142 return (ioctl(fd, USB_SET_REPORT, &ugd));