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/* $NetBSD: sd.c,v 1.6 1995/06/28 10:22:35 jonathan Exp $ */
/*
* Copyright (c) 1992, 1993
* 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 Ralph Campbell.
*
* 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.
*
* @(#)sd.c 8.1 (Berkeley) 6/10/93
*/
#include <stdarg.h>
#include <stand.h>
#include <sys/param.h>
#include <sys/disklabel.h>
int prom_seek __P((int, long, int));
int disk_read __P((int, char *, int, int));
int disk_open __P((char *, int));
struct sd_softc {
int sc_fd; /* PROM file id */
int sc_part; /* disk partition number */
struct disklabel sc_label; /* disk label for this disk */
};
int
sdstrategy(devdata, rw, bn, reqcnt, addr, cnt)
void *devdata;
int rw;
daddr_t bn;
u_int reqcnt;
char *addr;
u_int *cnt; /* out: number of bytes transfered */
{
struct sd_softc *sc = (struct sd_softc *)devdata;
struct partition *pp = &sc->sc_label.d_partitions[sc->sc_part];
int s;
long offset;
offset = (pp->p_offset + bn) * DEV_BSIZE;
s = disk_read(sc->sc_fd, addr, offset, reqcnt);
if (s < 0)
return (-s);
*cnt = s;
return (0);
}
int
sdopen(struct open_file *f, ...)
{
int ctlr, unit, part;
struct sd_softc *sc;
struct disklabel *lp;
int i, fd;
char *msg = "rd err";
char buf[DEV_BSIZE];
int cnt;
daddr_t labelsector;
static char device[] = "sd(0)";
va_list ap;
va_start(ap, f);
ctlr = va_arg(ap, int);
unit = va_arg(ap, int);
part = va_arg(ap, int);
if (unit >= 7 || part >= 16)
return (ENXIO);
device[3] = unit + '0';
fd = disk_open(device, 0);
if (fd < 0) {
return (ENXIO);
}
sc = alloc(sizeof(struct sd_softc));
bzero(sc, sizeof(struct sd_softc));
f->f_devdata = (void *)sc;
sc->sc_fd = fd;
sc->sc_part = part;
lp = &sc->sc_label;
lp->d_secsize = DEV_BSIZE;
lp->d_secpercyl = 1;
lp->d_npartitions = MAXPARTITIONS;
lp->d_partitions[part].p_offset = 0;
lp->d_partitions[part].p_size = 0x7fff0000;
labelsector = LABELSECTOR;
#ifdef USE_DOSBBSECTOR
/* First check for any DOS partition table */
i = sdstrategy(sc, F_READ, (daddr_t)DOSBBSECTOR, DEV_BSIZE, buf, &cnt);
if (!(i || cnt != DEV_BSIZE)) {
struct dos_partition dp, *dp2;
bcopy(buf + DOSPARTOFF, &dp, NDOSPART * sizeof(dp));
for (dp2=&dp, i=0; i < NDOSPART; i++, dp2++) {
if (dp2->dp_size) {
if((dp2->dp_typ == DOSPTYP_OPENBSD) ||
(dp2->dp_typ == DOSPTYP_FREEBSD)) {
labelsector += dp2->dp_start;
break;
}
}
}
}
else {
goto bad;
}
#endif
/* try to read disk label and partition table information */
i = sdstrategy(sc, F_READ, (daddr_t)labelsector, DEV_BSIZE, buf, &cnt);
if (i || cnt != DEV_BSIZE) {
goto bad;
}
msg = getdisklabel(buf, lp);
if (msg) {
goto bad;
}
if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) {
msg = "no part";
bad:
printf("sd%d: %s\n", unit, msg);
return (ENXIO);
}
return (0);
}
int
sdclose(f)
struct open_file *f;
{
#ifdef FANCY
free(f->f_devdata, sizeof(struct sd_softc));
f->f_devdata = (void *)0;
#endif
return (0);
}
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