NetBSD/sys/arch/hp300/stand/sd.c

150 lines
4.2 KiB
C

/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Van Jacobson of Lawrence Berkeley Laboratory and the Systems
* Programming Group of the University of Utah Computer Science Department.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* from: Utah Hdr: sd.c 1.2 90/01/23
* from: @(#)sd.c 7.4 (Berkeley) 5/5/91
* $Id: sd.c,v 1.3 1993/08/01 19:25:21 mycroft Exp $
*/
/*
* SCSI CCS disk driver
*/
#include <sys/param.h>
#include "saio.h"
#include "samachdep.h"
#include "../dev/scsireg.h"
struct sd_softc {
char sc_retry;
char sc_alive;
short sc_blkshift;
} sd_softc[NSD];
int sdpartoff[] = {
1024, 17408, 0, 17408,
115712, 218112, 82944, 0
};
#define SDRETRY 2
sdinit(unit)
register int unit;
{
register struct sd_softc *ss;
u_char stat;
int capbuf[2];
if (unit > NSD)
return (0);
ss = &sd_softc[unit];
/* NB: HP6300 won't boot if next printf is removed (???) - vj */
printf("sd%d: ", unit);
if ((stat = scsi_test_unit_rdy(unit)) == 0) {
/* drive may be doing RTZ - wait a bit */
printf("not ready - retrying ... ");
if (stat == STS_CHECKCOND) {
DELAY(1000000);
if (scsi_test_unit_rdy(unit) == 0) {
printf("giving up.\n");
return (0);
}
}
}
printf("unit ready.\n");
/*
* try to get the drive block size.
*/
capbuf[0] = 0;
capbuf[1] = 0;
if (scsi_read_capacity(unit, (u_char *)capbuf, sizeof(capbuf)) != 0) {
if (capbuf[1] > DEV_BSIZE)
for (; capbuf[1] > DEV_BSIZE; capbuf[1] >>= 1)
++ss->sc_blkshift;
}
ss->sc_alive = 1;
return (1);
}
sdreset(unit)
{
}
sdopen(io)
struct iob *io;
{
register int unit = io->i_unit;
register struct sd_softc *ss = &sd_softc[unit];
struct sdinfo *ri;
if (scsialive(unit) == 0)
_stop("scsi controller not configured");
if (ss->sc_alive == 0)
if (sdinit(unit) == 0)
_stop("sd init failed");
if (io->i_boff < 0 || io->i_boff > 7)
_stop("sd bad minor");
io->i_boff = sdpartoff[io->i_boff];
}
sdstrategy(io, func)
register struct iob *io;
register int func;
{
register int unit = io->i_unit;
register struct sd_softc *ss = &sd_softc[unit];
char stat;
daddr_t blk = io->i_bn >> ss->sc_blkshift;
u_int nblk = io->i_cc >> ss->sc_blkshift;
ss->sc_retry = 0;
retry:
if (func == F_READ)
stat = scsi_tt_read(unit, io->i_ma, io->i_cc, blk, nblk);
else
stat = scsi_tt_write(unit, io->i_ma, io->i_cc, blk, nblk);
if (stat) {
printf("sd(%d,?) err: 0x%x\n", unit, stat);
if (++ss->sc_retry > SDRETRY)
return(-1);
else
goto retry;
}
return(io->i_cc);
}