1/* $NetBSD$ */
2
3/*
4 * Copyright (c) 2008
5 *	Matthias Drochner.  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 ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 */
28
29#include <dev/usb/usb.h>
30#include <dev/usb/usbroothub_subr.h>
31
32/* helper functions for USB root hub emulation */
33
34int
35usb_makestrdesc(usb_string_descriptor_t *p, int l, const char *s)
36{
37	int i;
38
39	if (l == 0)
40		return (0);
41	p->bLength = 2 * strlen(s) + 2;
42	if (l == 1)
43		return (1);
44	p->bDescriptorType = UDESC_STRING;
45	l -= 2;
46	/* poor man's utf-16le conversion */
47	for (i = 0; s[i] && l > 1; i++, l -= 2)
48		USETW2(p->bString[i], 0, s[i]);
49	return (2 * i + 2);
50}
51
52int
53usb_makelangtbl(usb_string_descriptor_t *p, int l)
54{
55
56	if (l == 0)
57		return (0);
58	p->bLength = 4;
59	if (l == 1)
60		return (1);
61	p->bDescriptorType = UDESC_STRING;
62	if (l <  4)
63		return (2);
64	USETW(p->bString[0], 0x0409); /* english/US */
65	return (4);
66}
67