NetBSD/sys/arch/alpha/pci/irongate.c

/* $NetBSD: irongate.c,v 1.2 2000/06/26 18:19:26 thorpej Exp $ */

/*-
 * Copyright (c) 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe.
 *
 * 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 by the NetBSD
 *	Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 FOUNDATION OR CONTRIBUTORS
 * 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 "opt_api_up1000.h"

#include <sys/cdefs.h>

__KERNEL_RCSID(0, "$NetBSD: irongate.c,v 1.2 2000/06/26 18:19:26 thorpej Exp $");

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

#include <machine/autoconf.h>
#include <machine/rpb.h>
#include <machine/sysarch.h>

#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>

#include <alpha/pci/irongatereg.h>
#include <alpha/pci/irongatevar.h>

#ifdef API_UP1000
#include <alpha/pci/pci_up1000.h>
#endif

int	irongate_match(struct device *, struct cfdata *, void *);
void	irongate_attach(struct device *, struct device *, void *);

struct cfattach irongate_ca = {
	sizeof(struct irongate_softc), irongate_match, irongate_attach,
};

int	irongate_print(void *, const char *pnp);

extern struct cfdriver irongate_cd;

/* There can be only one. */
struct irongate_config irongate_configuration;
int	irongate_found;

int	irongate_bus_get_window(int, int,
	    struct alpha_bus_space_translation *);

/*
 * Set up the chipset's function pointers.
 */
void
irongate_init(struct irongate_config *icp, int mallocsafe)
{
	pcitag_t tag;
	pcireg_t reg;

	icp->ic_mallocsafe = mallocsafe;

	/*
	 * Set up PCI configuration space; we can only read the
	 * revision info through configuration space.
	 */
	irongate_pci_init(&icp->ic_pc, icp);
	alpha_pci_chipset = &icp->ic_pc;

	tag = pci_make_tag(&icp->ic_pc, 0, IRONGATE_PCIHOST_DEV, 0);

	/* Read the revision. */
	reg = irongate_conf_read0(icp, tag, PCI_CLASS_REG);
	icp->ic_rev = PCI_REVISION(reg);

	if (icp->ic_initted == 0) {
		/* Don't do these twice, since they set up extents. */
		irongate_bus_io_init(&icp->ic_iot, icp);
		irongate_bus_mem_init(&icp->ic_memt, icp);

		/* Only one each PCI I/O and MEM window. */
		alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 1;
		alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 1;
		
		alpha_bus_get_window = irongate_bus_get_window;
	}

	icp->ic_initted = 1;
}

int
irongate_match(struct device *parent, struct cfdata *match, void *aux)
{
	struct mainbus_attach_args *ma = aux;

	/* Make sure we're looking for an Irongate. */
	if (strcmp(ma->ma_name, irongate_cd.cd_name) != 0)
		return (0);

	if (irongate_found)
		return (0);

	return (1);
}

void
irongate_attach(struct device *parent, struct device *self, void *aux)
{
	struct irongate_softc *sc = (void *) self;
	struct irongate_config *icp;
	struct pcibus_attach_args pba;

	/* Note that we've attached the chipset; can't have 2 Irongates. */
	irongate_found = 1;

	/*
	 * Set up the chipset's info; done once at console init time
	 * (maybe), but we must do it here as well to take care of things
	 * that need to use memory allocation.
	 */
	icp = sc->sc_icp = &irongate_configuration;
	irongate_init(icp, 1);

	printf(": AMD 751 Core Logic + AGP Chipset, rev. %d\n", icp->ic_rev);

	irongate_dma_init(icp);

	switch (cputype) {
#ifdef API_UP1000
	case ST_API_NAUTILUS:
		pci_up1000_pickintr(icp);
		break;
#endif

	default:
		panic("irongate_attach: shouldn't be here, really...");
	}

	pba.pba_busname = "pci";
	pba.pba_iot = &icp->ic_iot;
	pba.pba_memt = &icp->ic_memt;
	pba.pba_dmat =
	    alphabus_dma_get_tag(&icp->ic_dmat_pci, ALPHA_BUS_PCI);
	pba.pba_pc = &icp->ic_pc;
	pba.pba_bus = 0;
	pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED |
	    PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY;
	(void) config_found(self, &pba, irongate_print);
}

int
irongate_print(void *aux, const char *pnp)
{
	struct pcibus_attach_args *pba = aux;

	/* Only PCIs can attach to Irongates; easy. */
	if (pnp != NULL)
		printf("%s at %s", pba->pba_busname, pnp);
	printf(" bus %d", pba->pba_bus);
	return (UNCONF);
}

int
irongate_bus_get_window(int type, int window,
    struct alpha_bus_space_translation *abst)
{
	struct irongate_config *icp = &irongate_configuration;
	bus_space_tag_t st;
	int error;

	switch (type) {
	case ALPHA_BUS_TYPE_PCI_IO:
		st = &icp->ic_iot;
		break;

	case ALPHA_BUS_TYPE_PCI_MEM:
		st = &icp->ic_memt;
		break;

	default:
		panic("irongate_bus_get_window");
	}

	error = alpha_bus_space_get_window(st, window, abst);
	if (error)
		return (error);

	abst->abst_sys_start = IRONGATE_PHYSADDR(abst->abst_sys_start);
	abst->abst_sys_end = IRONGATE_PHYSADDR(abst->abst_sys_end);

	return (0);
}