dev/isa/fdc_isa.c

/*	$NetBSD: fdc_isa.c,v 1.3 2001/11/13 08:01:14 lukem Exp $	*/

/*-
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum.
 *
 * 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 NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Don Ahn.
 *
 * 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.
 *
 *	@(#)fd.c	7.4 (Berkeley) 5/25/91
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: fdc_isa.c,v 1.3 2001/11/13 08:01:14 lukem Exp $");

#include "rnd.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/queue.h>
#if NRND > 0
#include <sys/rnd.h>
#endif

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

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

#include <dev/isa/fdreg.h>
#include <dev/isa/fdcvar.h>

int	fdc_isa_probe(struct device *, struct cfdata *, void *);
void	fdc_isa_attach(struct device *, struct device *, void *);

struct fdc_isa_softc {
	struct fdc_softc sc_fdc;	/* base fdc device */

	bus_space_handle_t sc_baseioh;	/* base I/O handle */
};

struct cfattach fdc_isa_ca = {
	sizeof(struct fdc_isa_softc), fdc_isa_probe, fdc_isa_attach
};

#ifdef NEWCONFIG
void	fdc_isa_forceintr(void *);
#endif

int
fdc_isa_probe(struct device *parent,
    struct cfdata *match,
    void *aux)
{
	struct isa_attach_args *ia = aux;
	bus_space_tag_t iot;
	bus_space_handle_t ioh, ctl_ioh, base_ioh;
	int rv;

	iot = ia->ia_iot;
	rv = 0;

	/* Disallow wildcarded I/O addresses. */
	if (ia->ia_iobase == IOBASEUNK)
		return (0);

	/* Map the I/O space. */
	if (bus_space_map(iot, ia->ia_iobase, 6 /* FDC_NPORT */, 0, &base_ioh))
		return (0);

	if (bus_space_subregion(iot, base_ioh, 2, 4, &ioh)) {
		bus_space_unmap(iot, base_ioh, 6);
		return (0);
	}

	if (bus_space_map(iot, ia->ia_iobase + fdctl + 2, 1, 0, &ctl_ioh)) {
		bus_space_unmap(iot, base_ioh, 6);
		return (0);
	}

	/* Not needed for the rest of the probe. */
	bus_space_unmap(iot, ctl_ioh, 1);

	/* reset */
	bus_space_write_1(iot, ioh, fdout, 0);
	delay(100);
	bus_space_write_1(iot, ioh, fdout, FDO_FRST);

	/* see if it can handle a command */
	if (out_fdc(iot, ioh, NE7CMD_SPECIFY) < 0)
		goto out;
	out_fdc(iot, ioh, 0xdf);
	out_fdc(iot, ioh, 2);

#ifdef NEWCONFIG
	if (ia->ia_iobase = IOBASEUNK || ia->ia_drq == DRQUNK)
		return (0);

	if (ia->ia_irq == IRQUNK) {
		ia->ia_irq = isa_discoverintr(fdc_isa_forceintr, aux);
		if (ia->ia_irq == IRQNONE)
			goto out;

		/* reset it again */
		bus_space_write_1(iot, ioh, fdout, 0);
		delay(100);
		bus_space_write_1(iot, ioh, fdout, FDO_FRST);
	}
#endif

	rv = 1;
	ia->ia_iosize = FDC_NPORT;
	ia->ia_msize = 0;

 out:
	bus_space_unmap(iot, base_ioh, 6 /* FDC_NPORT */);
	return (rv);
}

#ifdef NEWCONFIG
/*
 * XXX This is broken, and needs fixing.  In general, the interface needs
 * XXX to change.
 */
void
fdc_isa_forceintr(void *aux)
{
	struct isa_attach_args *ia = aux;
	int iobase = ia->ia_iobase;

	/*
	 * The motor is off; this should generate an error with or
	 * without a disk drive present.
	 */
	out_fdc(iot, ioh, NE7CMD_SEEK);
	out_fdc(iot, ioh, 0);
	out_fdc(iot, ioh, 0);
}
#endif

void
fdc_isa_attach(struct device *parent,
    struct device *self,
    void *aux)
{
	struct fdc_softc *fdc = (void *) self;
	struct fdc_isa_softc *isc = (void *) self;
	struct isa_attach_args *ia = aux;

	printf("\n");

	fdc->sc_iot = ia->ia_iot;
	fdc->sc_ic = ia->ia_ic;
	fdc->sc_drq = ia->ia_drq;

	if (bus_space_map(fdc->sc_iot, ia->ia_iobase, 6 /* FDC_NPORT */, 0,
	    &isc->sc_baseioh)) {
		printf("%s: unable to map I/O space\n", fdc->sc_dev.dv_xname);
		return;
	}

	if (bus_space_subregion(fdc->sc_iot, isc->sc_baseioh, 2, 4,
	    &fdc->sc_ioh)) {
		printf("%s: unable to subregion I/O space\n",
		    fdc->sc_dev.dv_xname);
		return;
	}

	if (bus_space_map(fdc->sc_iot, ia->ia_iobase + fdctl + 2, 1, 0,
	    &fdc->sc_fdctlioh)) {
		printf("%s: unable to map CTL I/O space\n",
		    fdc->sc_dev.dv_xname);
		return;
	}

	fdc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
	    IPL_BIO, fdcintr, fdc);

	fdcattach(fdc);
}