xref: /src/sys/arch/sparc64/dev/com_ebus.c

/*	$NetBSD: com_ebus.c,v 1.1 2000/09/21 22:25:08 eeh Exp $	*/

/*
 * Copyright (c) 1999, 2000 Matthew R. Green
 * 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. 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.
 */

/*
 * NS Super I/O PC87332VLJ "com" to ebus attachment
 */

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

#include <machine/bus.h>
#include <machine/autoconf.h>
#include <machine/openfirm.h>

#include <sparc64/dev/ebusreg.h>
#include <sparc64/dev/ebusvar.h>

#include <dev/cons.h>
#include <dev/ic/comvar.h>
#include <dev/sun/kbd_ms_ttyvar.h>

#include "kbd.h"
#include "ms.h"

cdev_decl(com); /* XXX this belongs elsewhere */

int	com_ebus_match __P((struct device *, struct cfdata *, void *));
void	com_ebus_attach __P((struct device *, struct device *, void *));
int	com_ebus_isconsole __P((int node));

struct cfattach com_ebus_ca = {
	sizeof(struct com_softc), com_ebus_match, com_ebus_attach
};

static char *com_names[] = {
	"su",
	"su_pnp",
	NULL
};

int
com_ebus_match(parent, match, aux)
	struct device *parent;
	struct cfdata *match;
	void *aux;
{
	struct ebus_attach_args *ea = aux;
	int i;

	for (i=0; com_names[i]; i++)
		if (strcmp(ea->ea_name, com_names[i]) == 0)
			return (1);

	return (0);
}

int
com_ebus_isconsole(node)
	int node;
{
	u_int chosen;

	/*
	 * We'll just to the OBP grovelling down here since that's
	 * the only type of firmware we support.
	 */
	chosen = OF_finddevice("/chosen");

	if (node == OF_instance_to_package(OF_stdin())) {
		return (1);
	}

	if (node == OF_instance_to_package(OF_stdout())) {
		return (1);
	}

	return (0);
}

#define BAUD_BASE       (1846200)

void
com_ebus_attach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	struct com_softc *sc = (void *)self;
	struct ebus_attach_args *ea = aux;
	struct kbd_ms_tty_attach_args kma;
	struct consdev *old_cn = cn_tab;
#if (NKBD > 0) || (NMS > 0)
	int maj;
#endif
	int i;

	sc->sc_iot = ea->ea_bustag;
	sc->sc_iobase = EBUS_PADDR_FROM_REG(&ea->ea_regs[0]);
	/*
	 * Addresses that shoud be supplied by the prom:
	 *	- normal com registers
	 *	- ns873xx configuration registers
	 *	- DMA space
	 * The `com' driver does not use DMA accesses, so we can
	 * ignore that for now.  We should enable the com port in
	 * the ns873xx registers here. XXX
	 *
	 * Use the prom address if there.
	 */
	if (ea->ea_nvaddrs)
		sc->sc_ioh = (bus_space_handle_t)ea->ea_vaddrs[0];
	else if (ebus_bus_map(sc->sc_iot, 0,
			      EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
			      ea->ea_regs[0].size,
			      BUS_SPACE_MAP_LINEAR,
			      0, &sc->sc_ioh) != 0) {
		printf(": can't map register space\n");
                return;
	}
	sc->sc_hwflags = 0;
	sc->sc_frequency = BAUD_BASE;

	for (i = 0; i < ea->ea_nintrs; i++)
		bus_intr_establish(ea->ea_bustag, ea->ea_intrs[i], 0,
		    IPL_SERIAL, comintr, sc);
	printf("\n");

	com_attach_subr(sc);

printf("com_ebus: orig cn_tab %p\n", cn_tab);
	kma.kmta_consdev = NULL;
	if (com_ebus_isconsole(ea->ea_node)) {
		extern struct consdev comcons;

		/* Record some info to attach console. */
		kma.kmta_baud = 9600;
		kma.kmta_cflag = (CREAD | CS8 | HUPCL);
		kma.kmta_consdev = &comcons;
printf("com_ebus: reverted cn_tab %p\n", cn_tab);
	}

#if (NKBD > 0) || (NMS > 0)
	kma.kmta_tp = sc->sc_tty;
/* If we figure out we're the console we should point this to our consdev */

	/* locate the major number */
	for (maj = 0; maj < nchrdev; maj++)
		if (cdevsw[maj].d_open == comopen)
			break;

	kma.kmta_dev = makedev(maj, sc->sc_dev.dv_unit);

/* Attach 'em if we got 'em. */
#if (NKBD > 0)
	kma.kmta_name = "keyboard";
	if (getproplen(ea->ea_node, kma.kmta_name) == 0) {
		config_found(self, (void *)&kma, NULL);
	}
#endif
#if (NMS > 0)
	kma.kmta_name = "mouse";
	if (getproplen(ea->ea_node, kma.kmta_name) == 0) {
		config_found(self, (void *)&kma, NULL);
	}
#endif
#endif
	if (kma.kmta_consdev) {
		/* Attach com as the console. */
printf("com_ebus: comcnattach at %d baud\n", kma.kmta_baud);
		if (comcnattach(sc->sc_iot, sc->sc_iobase, kma.kmta_baud,
			sc->sc_frequency, kma.kmta_cflag)) {
			printf("Error: comcnattach failed\n");
		}
printf("com_ebus: setting cn_tab %p to %p\n", cn_tab, kma.kmta_consdev);
		/*
		 * If we're the keyboard then we need the original
		 * cn_tab w/prom I/O, which sunkbd copied into kma.
		 * Otherwise we want conscom which we copied into
		 * kma.kmta_consdev.
		 */
		cn_tab = kma.kmta_consdev;
	}
}