xref: /src/sys/dev/ata/sata_subr.c

/*	$NetBSD: sata_subr.c,v 1.1 2004/05/28 23:26:27 thorpej Exp $	*/

/*-
 * Copyright (c) 2004 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe of Wasabi Systems, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the NetBSD
 *	Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Common functions for Serial ATA.
 */

#include <sys/param.h>

#include <dev/ata/satareg.h>
#include <dev/ata/satavar.h>

/*
 * sata_speed:
 *
 *	Return a string describing the port speed reported by
 *	the port's SStatus register.
 */
const char *
sata_speed(uint32_t sstatus)
{
	static const char *sata_speedtab[] = {
		"no negotiated speed",
		"1.5Gb/s",
		"3.0GB/s",
		"<unknown 3>",
		"<unknown 4>",
		"<unknown 5>",
		"<unknown 6>",
		"<unknown 7>",
		"<unknown 8>",
		"<unknown 9>",
		"<unknown 10>",
		"<unknown 11>",
		"<unknown 12>",
		"<unknown 13>",
		"<unknown 14>",
		"<unknown 15>",
	};

	return (sata_speedtab[(sstatus & SStatus_SPD_mask) >>
			      SStatus_SPD_shift]);
}