/* $NetBSD: com_acpi.c,v 1.2 2002/12/28 07:30:33 matt Exp $ */

/*
 * Copyright (c) 2002 Jared D. McNeill <jmcneill@invisible.ca>
 * 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. 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: com_acpi.c,v 1.2 2002/12/28 07:30:33 matt Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/termios.h>

#include <machine/bus.h>

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

#include <dev/acpi/acpica.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>

#include <dev/ic/comvar.h>

int	com_acpi_match(struct device *, struct cfdata *, void *);
void	com_acpi_attach(struct device *, struct device *, void *);

struct com_acpi_softc {
	struct com_softc sc_com;
	void *sc_ih;
};

CFATTACH_DECL(com_acpi, sizeof(struct com_acpi_softc), com_acpi_match,
    com_acpi_attach, NULL, NULL);

/*
 * Supported device IDs
 */

static const char * const com_acpi_ids[] = {
	"PNP0500",	/* Standard PC COM port */
	"PNP0501",	/* 16550A-compatible COM port */
	"PNP0510",	/* Generic IRDA-compatible device */
	"PNP0511",	/* Generic IRDA-compatible device */
	NULL
};

/*
 * com_acpi_match: autoconf(9) match routine
 */
int
com_acpi_match(struct device *parent, struct cfdata *match, void *aux)
{
	struct acpi_attach_args *aa = aux;
	char *id;
	int i;

	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
		return 0;

	for (id = com_acpi_ids[0]; id != NULL; id = com_acpi_ids[++i]) {
		if (strcmp(aa->aa_node->ad_devinfo.HardwareId,
		    com_acpi_ids[i]) == 0)
			return 1;
	}

	/* No matches found */
	return 0;
}

/*
 * com_acpi_attach: autoconf(9) attach routine
 */
void
com_acpi_attach(struct device *parent, struct device *self, void *aux)
{
	struct com_acpi_softc *asc = (struct com_acpi_softc *)self;
	struct com_softc *sc = &asc->sc_com;
	struct acpi_attach_args *aa = aux;
	struct acpi_resources res;
	struct acpi_io *io;
	struct acpi_irq *irq;
	ACPI_STATUS rv;

	printf("\n");

	/* parse resources */
	rv = acpi_resource_parse(&sc->sc_dev, aa->aa_node, &res,
	    &acpi_resource_parse_ops_default);
	if (rv != AE_OK) {
		printf("%s: unable to parse resources\n", sc->sc_dev.dv_xname);
		return;
	}

	/* find our i/o registers */
	io = acpi_res_io(&res, 0);
	if (io == NULL) {
		printf("%s: unable to find i/o register resource\n",
		    sc->sc_dev.dv_xname);
		return;
	}

	/* find our IRQ */
	irq = acpi_res_irq(&res, 0);
	if (irq == NULL) {
		printf("%s: unable to find irq resource\n",
		    sc->sc_dev.dv_xname);
		return;
	}

	if (com_is_console(aa->aa_iot, io->ar_base, &sc->sc_ioh))
		sc->sc_iot = aa->aa_iot;
	else if (bus_space_map(sc->sc_iot, io->ar_base, io->ar_length,
		    0, &sc->sc_ioh)) {
		printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
		return;
	}
	sc->sc_iobase = io->ar_base;

	printf("%s", sc->sc_dev.dv_xname);

	if (comprobe1(sc->sc_iot, sc->sc_ioh) == 0) {
		printf(": com probe failed\n");
		return;
	}

	sc->sc_frequency = 115200 * 16;

	com_attach_subr(sc);

	asc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq, 0,
					IPL_SERIAL, comintr, sc);
}