67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/* $NetBSD: usbroothub_subr.c,v 1.1 2008/02/03 10:57:13 drochner Exp $ */
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/*
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* Copyright (c) 2008
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* Matthias Drochner. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <dev/usb/usb.h>
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#include <dev/usb/usbroothub_subr.h>
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/* helper functions for USB root hub emulation */
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int
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usb_makestrdesc(usb_string_descriptor_t *p, int l, const char *s)
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{
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int i;
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if (l == 0)
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return (0);
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p->bLength = 2 * strlen(s) + 2;
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if (l == 1)
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return (1);
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p->bDescriptorType = UDESC_STRING;
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l -= 2;
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/* poor man's utf-16le conversion */
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for (i = 0; s[i] && l > 1; i++, l -= 2)
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USETW2(p->bString[i], 0, s[i]);
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return (2 * i + 2);
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}
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int
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usb_makelangtbl(usb_string_descriptor_t *p, int l)
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{
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if (l == 0)
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return (0);
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p->bLength = 4;
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if (l == 1)
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return (1);
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p->bDescriptorType = UDESC_STRING;
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if (l < 4)
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return (2);
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USETW(p->bString[0], 0x0409); /* english/US */
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return (4);
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}
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