xref: /src/sys/arch/evbarm/iq80310/obio.c

/*	$NetBSD: obio.c,v 1.22 2021/08/07 16:18:49 thorpej Exp $	*/

/*
 * Copyright (c) 2001, 2002, 2003  Wasabi Systems, Inc.
 * All rights reserved.
 *
 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
 *
 * 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 for the NetBSD Project by
 *	Wasabi Systems, Inc.
 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
 *    or promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
 * 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.
 */

/*
 * On-board device autoconfiguration support for Intel IQ80310
 * evaluation boards.
 *
 * The "obio" device node handles all of the CPLD functions,
 * as well ... timer, interrupts, etc.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: obio.c,v 1.22 2021/08/07 16:18:49 thorpej Exp $");

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

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

#include <evbarm/iq80310/iq80310reg.h>
#include <evbarm/iq80310/iq80310var.h>
#include <evbarm/iq80310/obiovar.h>

#include "locators.h"

int	obio_match(device_t, cfdata_t, void *);
void	obio_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(obio, 0,
    obio_match, obio_attach, NULL, NULL);

int	obio_print(void *, const char *);
int	obio_search(device_t, cfdata_t, const int *, void *);

/* there can be only one */
bool	obio_found;

int
obio_match(device_t parent, cfdata_t cf, void *aux)
{
#if 0
	struct mainbus_attach_args *ma = aux;
#endif

	if (obio_found)
		return (0);

#if 1
	/* XXX Shoot arch/arm/mainbus in the head. */
	return (1);
#else
	if (strcmp(cf->cf_name, ma->ma_name) == 0)
		return (1);

	return (0);
#endif
}

void
obio_attach(device_t parent, device_t self, void *aux)
{

	obio_found = true;

#if defined(IOP310_TEAMASA_NPWR)
	/*
	 * These boards don't have revision/backplane detect registers.
	 * Just ignore it.
	 */
	printf("\n");
#else /* Default to stock IQ80310 */
    {
	/*
	 * Yes, we're using knowledge of the obio bus space internals,
	 * here.
	 */
	uint8_t board_rev = CPLD_READ(IQ80310_BOARD_REV);
	uint8_t cpld_rev = CPLD_READ(IQ80310_CPLD_REV);
	uint8_t backplane = CPLD_READ(IQ80310_BACKPLANE_DET);

	printf(": board rev. %c, CPLD rev. %c, backplane %spresent\n",
	    BOARD_REV(board_rev), CPLD_REV(cpld_rev),
	    (backplane & 1) ? "" : "not ");
    }
#endif /* list of IQ80310-based designs */

	/*
	 * Attach all the on-board devices as described in the kernel
	 * configuration file.
	 */
	config_search(self, NULL,
	    CFARGS(.search = obio_search));
}

int
obio_print(void *aux, const char *pnp)
{
	struct obio_attach_args *oba = aux;

	aprint_normal(" addr 0x%08lx", oba->oba_addr);
	if (oba->oba_size != OBIOCF_SIZE_DEFAULT)
		aprint_normal("-0x%08lx", oba->oba_addr + (oba->oba_size - 1));
	if (oba->oba_width != OBIOCF_WIDTH_DEFAULT)
		aprint_normal(" width %d", oba->oba_width);
	if (oba->oba_irq != -1)
		aprint_normal(" xint3 %d", IRQ_XINT3(oba->oba_irq));

	return (UNCONF);
}

int
obio_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
	struct obio_attach_args oba;

	oba.oba_st = &obio_bs_tag;
	oba.oba_addr = cf->cf_loc[OBIOCF_ADDR];
	oba.oba_size = cf->cf_loc[OBIOCF_SIZE];
	oba.oba_width = cf->cf_loc[OBIOCF_WIDTH];
	if (cf->cf_loc[OBIOCF_XINT3] != OBIOCF_XINT3_DEFAULT)
		oba.oba_irq = XINT3_IRQ(cf->cf_loc[OBIOCF_XINT3]);
	else
		oba.oba_irq = -1;

	if (config_probe(parent, cf, &oba))
		config_attach(parent, cf, &oba, obio_print, CFARGS_NONE);

	return (0);
}