xref: /netbsd-src/sys/arch/hppa/gsc/gscbus.c (revision ec6aa33e7a2f3f2be898b76a82d820ece4871c14)

/*	$NetBSD: gscbus.c,v 1.4 2022/09/29 06:39:58 skrll Exp $	*/

/*	$OpenBSD: gscbus.c,v 1.13 2001/08/01 20:32:04 miod Exp $	*/

/*
 * Copyright (c) 1998 Michael Shalayeff
 * 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 OR HIS RELATIVES 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 MIND, 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.
 */

/*
 * Sample IO layouts:
 * 712:
 *
 * f0100000 -- lasi0
 * f0102000 -- lpt0
 * f0104000 -- audio0
 * f0105000 -- com0
 * f0106000 -- siop0
 * f0107000 -- ie0
 * f0108000 -- kbd0
 * f0108100 -- pms0
 * f010a000 -- fdc0
 * f010c000 -- *lasi0
 * f0200000 -- wax0
 * f8000000 -- sti0
 * fffbe000 -- cpu0
 * fffbf000 -- mem0
 *
 * 725/50:
 *
 * f0820000 -- dma
 * f0821000 -- hil
 * f0822000 -- com1
 * f0823000 -- com0
 * f0824000 -- lpt0
 * f0825000 -- siop0
 * f0826000 -- ie0
 * f0827000 -- dma reset
 * f0828000 -- timers
 * f0829000 -- domain kbd
 * f082f000 -- asp0
 * f1000000 -- audio0
 * fc000000 -- eisa0
 * fffbe000 -- cpu0
 * fffbf000 -- mem0
 *
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: gscbus.c,v 1.4 2022/09/29 06:39:58 skrll Exp $");

#define GSCDEBUG

#include "opt_kgdb.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/mbuf.h>
#include <sys/reboot.h>

#include <machine/iomod.h>
#include <machine/autoconf.h>
#include <machine/cpufunc.h>

#include <hppa/gsc/gscbusvar.h>
#include <hppa/hppa/machdep.h>

int	gscmatch(device_t, cfdata_t, void *);
void	gscattach(device_t, device_t, void *);

struct gsc_softc {
	device_t sc_dev;
	struct gsc_attach_args sc_ga;
	void *sc_ih;
};

CFATTACH_DECL_NEW(gsc, sizeof(struct gsc_softc),
    gscmatch, gscattach, NULL, NULL);

/*
 * pdc_scanbus calls this function back with each module
 * it finds on the GSC bus.  We call the IC-specific function
 * to fix up the module's attach arguments, then we match
 * and attach it.
 */
static device_t gsc_module_callback(device_t, struct confargs *);
static device_t
gsc_module_callback(device_t self, struct confargs *ca)
{
	struct gsc_softc *sc = device_private(self);
	struct gsc_attach_args ga;

	/* Make the GSC attach args. */
	ga = sc->sc_ga;
	ga.ga_ca = *ca;
	ga.ga_iot = sc->sc_ga.ga_iot;
	ga.ga_dmatag = sc->sc_ga.ga_dmatag;
	(*sc->sc_ga.ga_fix_args)(sc->sc_ga.ga_fix_args_cookie, &ga);

	return config_found(self, &ga, mbprint,
	    CFARGS(.submatch = mbsubmatch));
}

int
gscmatch(device_t parent, cfdata_t cf, void *aux)
{
	struct gsc_attach_args *ga = aux;

	return !strcmp(ga->ga_name, "gsc");
}

void
gscattach(device_t parent, device_t self, void *aux)
{
	struct gsc_softc *sc = device_private(self);
	struct gsc_attach_args *ga = aux;
	struct cpu_info *ci = &cpus[0];

	sc->sc_dev = self;
	sc->sc_ga = *ga;

#ifdef USELEDS
	if (machine_ledaddr)
		aprint_normal(": %sleds", machine_ledword? "word" : "");
#endif

	aprint_normal("\n");

	/* Add the I/O subsystem's interrupt register. */
	ga->ga_ir->ir_name = device_xname(self);
	sc->sc_ih = hppa_intr_establish(IPL_NONE, NULL, ga->ga_ir,
	    &ci->ci_ir, ga->ga_irq);

	ga->ga_ca.ca_nmodules = MAXMODBUS;
	ga->ga_ca.ca_hpabase = 0;
	pdc_scanbus(self, &ga->ga_ca, gsc_module_callback);
}

int
gscprint(void *aux, const char *pnp)
{

	return (UNCONF);
}