xref: /src/sys/dev/isa/bha_isa.c

/*	$NetBSD: bha_isa.c,v 1.6.2.1 1997/05/13 03:08:09 thorpej Exp $	*/

/*
 * Copyright (c) 1994, 1996, 1997 Charles M. Hannum.  All rights reserved.
 *
 * 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 Charles M. Hannum.
 * 4. The name of the author may not 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 <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <machine/bus.h>
#include <machine/intr.h>

#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>

#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>

#include <dev/ic/bhareg.h>
#include <dev/ic/bhavar.h>

#define	BHA_ISA_IOSIZE	4

int	bha_isa_probe __P((struct device *, void *, void *));
void	bha_isa_attach __P((struct device *, struct device *, void *));

struct cfattach bha_isa_ca = {
	sizeof(struct bha_softc), bha_isa_probe, bha_isa_attach
};

/*
 * Check the slots looking for a board we recognise
 * If we find one, note it's address (slot) and call
 * the actual probe routine to check it out.
 */
int
bha_isa_probe(parent, match, aux)
	struct device *parent;
	void *match, *aux;
{
	struct isa_attach_args *ia = aux;
	bus_space_tag_t iot = ia->ia_iot;
	bus_space_handle_t ioh;
	struct bha_probe_data bpd;
	int rv;

	if (bus_space_map(iot, ia->ia_iobase, BHA_ISA_IOSIZE, 0, &ioh))
		return (0);

	rv = bha_find(iot, ioh, &bpd);

	bus_space_unmap(iot, ioh, BHA_ISA_IOSIZE);

	if (rv) {
		if (ia->ia_irq != -1 && ia->ia_irq != bpd.sc_irq)
			return (0);
		if (ia->ia_drq != -1 && ia->ia_drq != bpd.sc_drq)
			return (0);
		ia->ia_irq = bpd.sc_irq;
		ia->ia_drq = bpd.sc_drq;
		ia->ia_msize = 0;
		ia->ia_iosize = BHA_ISA_IOSIZE;
	}
	return (rv);
}

/*
 * Attach all the sub-devices we can find
 */
void
bha_isa_attach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	struct isa_attach_args *ia = aux;
	struct bha_softc *sc = (void *)self;
	bus_space_tag_t iot = ia->ia_iot;
	bus_space_handle_t ioh;
	struct bha_probe_data bpd;
	isa_chipset_tag_t ic = ia->ia_ic;

	printf("\n");

	if (bus_space_map(iot, ia->ia_iobase, BHA_ISA_IOSIZE, 0, &ioh))
		panic("bha_isa_attach: bus_space_map failed");

	sc->sc_iot = iot;
	sc->sc_ioh = ioh;
	sc->sc_dmat = ia->ia_dmat;
	if (!bha_find(iot, ioh, &bpd))
		panic("bha_isa_attach: bha_find failed");

	sc->sc_dmaflags = 0;
	if (bpd.sc_drq != -1)
		isa_dmacascade(parent, bpd.sc_drq);
	else {
		/*
		 * We have a VLB controller.  If we're at least both
		 * hardware revision E and firmware revision 3.37,
		 * we can do 32-bit DMA (earlier revisions are buggy
		 * in this regard).
		 */
		bha_inquire_setup_information(sc);
		if (strcmp(sc->sc_firmware, "3.37") < 0)
		    printf("%s: buggy VLB controller, disabling 32-bit DMA\n",
		        sc->sc_dev.dv_xname);
		else
			sc->sc_dmaflags = ISABUS_DMA_32BIT;
	}

	sc->sc_ih = isa_intr_establish(ic, bpd.sc_irq, IST_EDGE, IPL_BIO,
	    bha_intr, sc);
	if (sc->sc_ih == NULL) {
		printf("%s: couldn't establish interrupt\n",
		    sc->sc_dev.dv_xname);
		return;
	}

	bha_attach(sc, &bpd);
}