usb4bsd: Adjust header paths in libusbhid, usbhidctl, and public headers.
[dragonfly.git] / lib / libu4bhid / data.c
CommitLineData
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1/* $NetBSD: data.c,v 1.8 2000/04/02 11:10:53 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
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29#include <sys/param.h>
30#include <assert.h>
31#include <stdlib.h>
32#include <string.h>
3186c89e 33#include <bus/u4b/usb_ioctl.h>
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34#include "usbhid.h"
35#include "usbvar.h"
36
37int32_t
38hid_get_data(const void *p, const hid_item_t *h)
39{
40 const uint8_t *buf;
41 uint32_t hpos;
42 uint32_t hsize;
43 uint32_t data;
44 int i, end, offs;
45
46 buf = p;
47
48 /* Skip report ID byte. */
49 if (h->report_ID > 0)
50 buf++;
51
52 hpos = h->pos; /* bit position of data */
53 hsize = h->report_size; /* bit length of data */
54
55 /* Range check and limit */
56 if (hsize == 0)
57 return (0);
58 if (hsize > 32)
59 hsize = 32;
60
61 offs = hpos / 8;
62 end = (hpos + hsize) / 8 - offs;
63 data = 0;
64 for (i = 0; i <= end; i++)
65 data |= buf[offs + i] << (i*8);
66
67 /* Correctly shift down data */
68 data >>= hpos % 8;
69 hsize = 32 - hsize;
70
71 /* Mask and sign extend in one */
72 if ((h->logical_minimum < 0) || (h->logical_maximum < 0))
73 data = (int32_t)((int32_t)data << hsize) >> hsize;
74 else
75 data = (uint32_t)((uint32_t)data << hsize) >> hsize;
76
77 return (data);
78}
79
80void
81hid_set_data(void *p, const hid_item_t *h, int32_t data)
82{
83 uint8_t *buf;
84 uint32_t hpos;
85 uint32_t hsize;
86 uint32_t mask;
87 int i;
88 int end;
89 int offs;
90
91 buf = p;
92
93 /* Set report ID byte. */
94 if (h->report_ID > 0)
95 *buf++ = h->report_ID & 0xff;
96
97 hpos = h->pos; /* bit position of data */
98 hsize = h->report_size; /* bit length of data */
99
100 if (hsize != 32) {
101 mask = (1 << hsize) - 1;
102 data &= mask;
103 } else
104 mask = ~0;
105
106 data <<= (hpos % 8);
107 mask <<= (hpos % 8);
108 mask = ~mask;
109
110 offs = hpos / 8;
111 end = (hpos + hsize) / 8 - offs;
112
113 for (i = 0; i <= end; i++)
114 buf[offs + i] = (buf[offs + i] & (mask >> (i*8))) |
115 ((data >> (i*8)) & 0xff);
116}
117
118int
119hid_get_report(int fd, enum hid_kind k, unsigned char *data, unsigned int size)
120{
121 struct usb_gen_descriptor ugd;
122
123 memset(&ugd, 0, sizeof(ugd));
124 ugd.ugd_data = hid_pass_ptr(data);
125 ugd.ugd_maxlen = size;
126 ugd.ugd_report_type = k + 1;
127 return (ioctl(fd, USB_GET_REPORT, &ugd));
128}
129
130int
131hid_set_report(int fd, enum hid_kind k, unsigned char *data, unsigned int size)
132{
133 struct usb_gen_descriptor ugd;
134
135 memset(&ugd, 0, sizeof(ugd));
136 ugd.ugd_data = hid_pass_ptr(data);
137 ugd.ugd_maxlen = size;
138 ugd.ugd_report_type = k + 1;
139 return (ioctl(fd, USB_SET_REPORT, &ugd));
140}