1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1988 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32#pragma weak _cfsetispeed = cfsetispeed
33
34#include "lint.h"
35#include <sys/types.h>
36#include <sys/termios.h>
37
38/*
39 * sets the input baud rate stored in c_cflag to speed
40 */
41
42int
43cfsetispeed(struct termios *termios_p, speed_t speed)
44{
45	/*
46	 * If the input speed is zero, set it to output speed
47	 */
48	if (speed == 0) {
49		speed = termios_p->c_cflag & CBAUD;
50		if (termios_p->c_cflag & CBAUDEXT)
51			speed += (CBAUD + 1);
52	}
53
54	if ((speed << 16) > CIBAUD) {
55		termios_p->c_cflag |= CIBAUDEXT;
56		speed -= ((CIBAUD >> 16) + 1);
57	} else
58		termios_p->c_cflag &= ~CIBAUDEXT;
59	termios_p->c_cflag =
60	    (termios_p->c_cflag & ~CIBAUD) | ((speed << 16) & CIBAUD);
61	return (0);
62}
63