xref: /src/sys/arch/luna68k/stand/boot/sd.c

/*	$NetBSD: sd.c,v 1.8 2014/01/03 07:17:19 tsutsui Exp $	*/

/*
 * Copyright (c) 1992 OMRON Corporation.
 *
 * This code is derived from software contributed to Berkeley by
 * OMRON Corporation.
 *
 * 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
 */
/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * OMRON Corporation.
 *
 * 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. 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
 */

/*
 * sd.c -- SCSI DISK device driver
 * by A.Fujita, FEB-26-1992
 */


/*
 * SCSI CCS (Command Command Set) disk driver.
 */
#include <sys/param.h>
#include <sys/disklabel.h>
#include <luna68k/stand/boot/samachdep.h>
#include <luna68k/stand/boot/scsireg.h>
#include <luna68k/stand/boot/device.h>

struct	disklabel sdlabel[NSD];

struct	sd_softc {
	struct	hp_device *sc_hd;
	short	sc_flags;
	short	sc_type;	/* drive type */
	short	sc_punit;	/* physical unit (scsi lun) */
	u_short	sc_bshift;	/* convert device blocks to DEV_BSIZE blks */
	u_int	sc_blks;	/* number of blocks on device */
	int	sc_blksize;	/* device block size in bytes */
};

struct sd_devdata {
	int	unit;		/* drive number */
	int	part;		/* partition */
};

static int sdinit(void *);
static int sdident(struct sd_softc *, struct hp_device *);

struct	driver sddriver = {
	sdinit, "sd", NULL,
};

struct sd_softc sd_softc[NSD];
struct sd_devdata sd_devdata[NSD];

/* sc_flags values */
#define	SDF_ALIVE	0x1

#define	sdunit(x)	((minor(x) >> 3) & 0x7)
#define sdpart(x)	(minor(x) & 0x7)

static struct scsi_inquiry inqbuf;
static struct scsi_generic_cdb inq = {
	6,
	{ CMD_INQUIRY, 0, 0, 0, sizeof(inqbuf), 0 }
};

static u_long capbuf[2];
struct scsi_generic_cdb cap = {
	10,
	{ CMD_READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
};

int
sdident(struct sd_softc *sc, struct hp_device *hd)
{
	char idstr[32];
	int unit;
	int ctlr, slave;
	int i;
	int tries = 10;

	ctlr = hd->hpd_ctlr;
	slave = hd->hpd_slave;
	unit = sc->sc_punit;

	/*
	 * See if unit exists and is a disk then read block size & nblocks.
	 */
	while ((i = scsi_test_unit_rdy(ctlr, slave, unit)) != 0) {
		if (i < 0 || --tries < 0)
			return (-1);
		if (i == STS_CHECKCOND) {
			u_char sensebuf[8];
			struct scsi_xsense *sp = (struct scsi_xsense *)sensebuf;

			scsi_request_sense(ctlr, slave, unit, sensebuf, 8);
			if (sp->class == 7 && sp->key == 6)
				/* drive doing an RTZ -- give it a while */
				DELAY(1000000);
		}
		DELAY(1000);
	}
	if (scsi_immed_command(ctlr, slave, unit, &inq, (u_char *)&inqbuf,
			       sizeof(inqbuf)) ||
	    scsi_immed_command(ctlr, slave, unit, &cap, (u_char *)&capbuf,
			       sizeof(capbuf)))
		/* doesn't exist or not a CCS device */
		return (-1);

	switch (inqbuf.type) {
	case 0:		/* disk */
	case 4:		/* WORM */
	case 5:		/* CD-ROM */
	case 7:		/* Magneto-optical */
		break;
	default:	/* not a disk */
		return (-1);
	}
	sc->sc_blks    = capbuf[0];
	sc->sc_blksize = capbuf[1];

	memcpy(idstr, &inqbuf.vendor_id, 28);
	for (i = 27; i > 23; --i)
		if (idstr[i] != ' ')
			break;
	idstr[i+1] = 0;
	for (i = 23; i > 7; --i)
		if (idstr[i] != ' ')
			break;
	idstr[i+1] = 0;
	for (i = 7; i >= 0; --i)
		if (idstr[i] != ' ')
			break;
	idstr[i+1] = 0;
	printf("sd%d: %s %s rev %s", hd->hpd_unit, idstr, &idstr[8],
	       &idstr[24]);

	printf(", %d bytes/sect x %d sectors\n", sc->sc_blksize, sc->sc_blks);
	if (sc->sc_blksize != DEV_BSIZE) {
		if (sc->sc_blksize < DEV_BSIZE) {
			printf("sd%d: need %d byte blocks - drive ignored\n",
				unit, DEV_BSIZE);
			return (-1);
		}
		for (i = sc->sc_blksize; i > DEV_BSIZE; i >>= 1)
			++sc->sc_bshift;
		sc->sc_blks <<= sc->sc_bshift;
	}
	return(inqbuf.type);
}

int
sdinit(void *arg)
{
	struct hp_device *hd = arg;
	struct sd_softc *sc = &sd_softc[hd->hpd_unit];
	struct disklabel *lp;
	char *msg;

#ifdef DEBUG
	printf("sdinit: hd->hpd_unit = %d\n", hd->hpd_unit);
	printf("sdinit: hd->hpd_ctlr = %d, hd->hpd_slave = %d\n",
	       hd->hpd_ctlr, hd->hpd_slave);
#endif
	sc->sc_hd = hd;
	sc->sc_punit = 0;	/* XXX no LUN support yet */
	sc->sc_type = sdident(sc, hd);
	if (sc->sc_type < 0)
		return(0);

	/*
	 * Use the default sizes until we've read the label,
	 * or longer if there isn't one there.
	 */
	lp = &sdlabel[hd->hpd_unit];

	if (lp->d_secpercyl == 0) {
		lp->d_secsize = DEV_BSIZE;
		lp->d_nsectors = 32;
		lp->d_ntracks = 20;
		lp->d_secpercyl = 32*20;
		lp->d_npartitions = 1;
		lp->d_partitions[0].p_offset = 0;
		lp->d_partitions[0].p_size = LABELSECTOR + 1;
	}

	/*
	 * read disklabel
	 */
	msg = readdisklabel(hd->hpd_ctlr, hd->hpd_slave, lp);
	if (msg != NULL)
		printf("sd%d: %s\n", hd->hpd_unit, msg);

	sc->sc_flags = SDF_ALIVE;
	return(1);
}

int
sdopen(struct open_file *f, ...)
{
	va_list ap;
	struct sd_devdata *sd;
	int unit, part;

	va_start(ap, f);
	unit = va_arg(ap, int);
	part = va_arg(ap, int);
	va_end(ap);

	if (unit < 0 || unit >= NSD)
		return(-1);
	if (part < 0 || part >= 8)
		return(-1);

	sd = &sd_devdata[unit];
	sd->unit = unit;
	sd->part = part;
	f->f_devdata = (void *)sd;

	return 0;
}

int
sdclose(struct open_file *f)
{
	struct sd_devdata *sd = f->f_devdata;

	sd->unit = -1;
	sd->part = -1;
	f->f_devdata = NULL;

	return 0;
}

static struct scsi_generic_cdb cdb_read = {
	10,
	{ CMD_READ_EXT,  0, 0, 0, 0, 0, 0, 0, 0, 0 }
};

static struct scsi_generic_cdb cdb_write = {
	6,
	{ CMD_WRITE_EXT, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
};

int
sdstrategy(void *devdata, int func, daddr_t dblk, size_t size, void *v_buf,
    size_t *rsize)
{
	struct sd_devdata *sd = devdata;
	struct disklabel *lp;
	uint8_t *buf = v_buf;
	int unit = sd->unit;
	int part = sd->part;
	struct sd_softc *sc = &sd_softc[unit];
	struct scsi_generic_cdb *cdb;
	daddr_t blk;
	u_int nblk  = size >> sc->sc_bshift;
	int stat, ctlr, slave;
#ifdef DEBUG
	int i;
#endif

	if (unit < 0 || unit >= NSD)
		return(-1);

	ctlr  = sc->sc_hd->hpd_ctlr;
	slave = sc->sc_hd->hpd_slave;

	lp = &sdlabel[unit];
	blk = dblk + (lp->d_partitions[part].p_offset >> sc->sc_bshift);

	if (func == F_READ)
		cdb = &cdb_read;
	else
		cdb = &cdb_write;

	cdb->cdb[2] = (blk & 0xff000000) >> 24;
	cdb->cdb[3] = (blk & 0x00ff0000) >> 16;
	cdb->cdb[4] = (blk & 0x0000ff00) >>  8;
	cdb->cdb[5] = (blk & 0x000000ff);

	cdb->cdb[7] = ((nblk >> DEV_BSHIFT) & 0xff00) >> 8;
	cdb->cdb[8] = ((nblk >> DEV_BSHIFT) & 0x00ff);

#ifdef DEBUG
	printf("sdstrategy: unit = %d\n", unit);
	printf("sdstrategy: blk = %lu (0x%lx), nblk = %u (0x%x)\n", (u_long)blk, (long)blk, nblk, nblk);
	for (i = 0; i < 10; i++)
		printf("sdstrategy: cdb[%d] = 0x%x\n", i, cdb->cdb[i]);
	printf("sdstrategy: ctlr = %d, slave = %d\n", ctlr, slave);
#endif
	stat = scsi_immed_command(ctlr, slave, sc->sc_punit, cdb, buf, size);
	if (rsize)
		*rsize = size;

	return 0;
}