/*	$NetBSD: st_atapi.c,v 1.3 2001/06/18 09:41:06 bouyer Exp $ */

/*
 * Copyright (c) 2001 Manuel Bouyer.
 *
 * 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 AUTHOR ``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 AUTHOR 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.
 *
 */


#include "opt_scsi.h"
#include "rnd.h"

#include <sys/types.h>
#include <sys/param.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/systm.h>

#include <dev/scsipi/stvar.h>
#include <dev/scsipi/atapi_tape.h>

int	st_atapibus_match __P((struct device *, struct cfdata *, void *));
void	st_atapibus_attach __P((struct device *, struct device *, void *));
int	st_atapibus_ops __P((struct st_softc *, int, int));
int	st_atapibus_mode_sense __P((struct st_softc *, int));
int	st_atapibus_mode_select __P((struct st_softc *, int));
int	st_atapibus_do_ms __P((struct st_softc *, int, void *, int, int));

struct cfattach st_atapibus_ca = {
	sizeof(struct st_softc), st_atapibus_match, st_atapibus_attach
};

const struct scsipi_inquiry_pattern st_atapibus_patterns[] = {
	{T_SEQUENTIAL, T_REMOV,
	 "",	 "",		 ""},
};

int
st_atapibus_match(parent, match, aux)
	struct device *parent;
	struct cfdata *match;
	void *aux;
{
	struct scsipibus_attach_args *sa = aux;
	int priority;

	if (scsipi_periph_bustype(sa->sa_periph) != SCSIPI_BUSTYPE_ATAPI)
		return (0);

	(void)scsipi_inqmatch(&sa->sa_inqbuf,
	    (caddr_t)st_atapibus_patterns,
	    sizeof(st_atapibus_patterns)/sizeof(st_atapibus_patterns[0]),
	    sizeof(st_atapibus_patterns[0]), &priority);
	return (priority);
}

void
st_atapibus_attach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	struct st_softc *st = (void *)self;

	st->ops = st_atapibus_ops;
	stattach(parent, st, aux);
}

int
st_atapibus_ops(st, op, flags)
	struct st_softc *st;
	int op;
	int flags;
{
	switch(op) {
	case ST_OPS_RBL:
		/* done in mode_sense */
		return 0;
	case ST_OPS_MODESENSE:
		return st_atapibus_mode_sense(st, flags);
	case ST_OPS_MODESELECT:
		return st_atapibus_mode_select(st, flags);
	case ST_OPS_CMPRSS_ON:
	case ST_OPS_CMPRSS_OFF:       
		return ENODEV;
	default:
		panic("st_scsibus_ops: invalid op");
		/* NOTREACHED */      
	}
}

int
st_atapibus_mode_sense(st, flags)
	struct st_softc *st;
	int flags;
{
	int count, error;
	struct atapi_cappage cappage;
	struct scsipi_periph *periph = st->sc_periph;

	/* get drive capabilities, some drives needs this repeated */
	for (count = 0 ; count < 5 ; count++) {
		error = scsipi_mode_sense(periph, SMS_DBD,
		    ATAPI_TAPE_CAP_PAGE, &cappage.header, sizeof(cappage),
		    flags | XS_CTL_DATA_ONSTACK, ST_RETRIES, ST_CTL_TIME);
		if (error == 0) {
			st->numblks = 0; /* unused anyway */
			if (cappage.cap4 & ATAPI_TAPE_CAP_PAGE_BLK32K)
				st->media_blksize = 32768;
			else if (cappage.cap4 & ATAPI_TAPE_CAP_PAGE_BLK1K)
				st->media_blksize = 1024;
			else if (cappage.cap4 & ATAPI_TAPE_CAP_PAGE_BLK512)
				st->media_blksize = 512;
			else {
				error = ENODEV;
				continue;
			}
			st->blkmin = st->blkmax = st->media_blksize;
			st->media_density = 0;
			if (cappage.header.dev_spec & SMH_DSP_WRITE_PROT)
				st->flags |= ST_READONLY;
			else
				st->flags &= ~ST_READONLY;
			SC_DEBUG(periph, SCSIPI_DB3,
			    ("density code %d, %d-byte blocks, write-%s, ",
			    st->media_density, st->media_blksize,
			    st->flags & ST_READONLY ? "protected" : "enabled"));
			SC_DEBUG(periph, SCSIPI_DB3,
			    ("%sbuffered\n",
			    cappage.header.dev_spec & SMH_DSP_BUFF_MODE ?
			    "" : "un"));
			periph->periph_flags |= PERIPH_MEDIA_LOADED;
			return 0;
		}
	}
	return error;
}

int
st_atapibus_mode_select(st, flags)
	struct st_softc *st;
	int flags;
{
	return ENODEV; /* for now ... */
}