NetBSD/sys/dev/ata/sata_subr.c

79 lines
2.6 KiB
C

/* $NetBSD: sata_subr.c,v 1.2 2005/12/11 12:21:14 christos 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]);
}