xref: /freebsd/sys/dev/scc/scc_bfe_macio.c (revision fdafd315ad0d0f28a11b9fb4476a9ab059c62b92)

/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2006 Marcel Moolenaar
 * 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.
 *
 * 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/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/module.h>

#include <dev/ofw/ofw_bus.h>

#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>

#include <dev/scc/scc_bfe.h>

#define	MACIO_REGSHFT	4
#define	MACIO_RCLK	230400

static int
scc_macio_probe(device_t dev)
{
	struct scc_softc *sc;
	const char *nm;

	sc = device_get_softc(dev);
	nm = ofw_bus_get_name(dev);
	/* Attach to modern escc (channel shift 4 bits) */
	if (!strcmp(nm, "escc")) {
		device_set_desc(dev, "Zilog Z8530 dual channel SCC");
		sc->sc_class = &scc_z8530_escc_class;
		return (scc_bfe_probe(dev, MACIO_REGSHFT, MACIO_RCLK, 0));
	}
	return (ENXIO);
}

static int
scc_macio_attach(device_t dev)
{

	return (scc_bfe_attach(dev, 3));
}

static device_method_t scc_macio_methods[] = {
	/* Device interface */
	DEVMETHOD(device_probe,		scc_macio_probe),
	DEVMETHOD(device_attach,	scc_macio_attach),
	DEVMETHOD(device_detach,	scc_bfe_detach),

	DEVMETHOD(bus_alloc_resource,	scc_bus_alloc_resource),
	DEVMETHOD(bus_release_resource,	scc_bus_release_resource),
	DEVMETHOD(bus_get_resource,	scc_bus_get_resource),
	DEVMETHOD(bus_read_ivar,	scc_bus_read_ivar),
	DEVMETHOD(bus_setup_intr,	scc_bus_setup_intr),
	DEVMETHOD(bus_teardown_intr,	scc_bus_teardown_intr),

	DEVMETHOD_END
};

static driver_t scc_macio_driver = {
	scc_driver_name,
	scc_macio_methods,
	sizeof(struct scc_softc),
};

DRIVER_MODULE(scc, macio, scc_macio_driver, NULL, NULL);