/*      $OpenBSD: irongate.c,v 1.13 2025/06/28 16:04:09 miod Exp $      */
/* $NetBSD: irongate.c,v 1.3 2000/11/29 06:29:10 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.
 *
 * 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>

#include <machine/autoconf.h>
#include <machine/rpb.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 *, void *, void *);
void    irongate_attach(struct device *, struct device *, void *);

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

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

struct cfdriver irongate_cd = {
        NULL, "irongate", DV_DULL,
};

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

/*
 * 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;
        alpha_pci_chipset->pc_name = "irongate";
        alpha_pci_chipset->pc_mem = IRONGATE_MEM_BASE;
        alpha_pci_chipset->pc_mem = IRONGATE_MEM_BASE;
        alpha_pci_chipset->pc_bwx = 1;

        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);
        }

        icp->ic_initted = 1;
}

int
irongate_match(struct device *parent, void *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_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 = &irongate_configuration;
        irongate_init(icp, 1);

        printf(": rev. %d\n", icp->ic_rev);

        irongate_dma_init(icp);

        /*
         * Do PCI memory initialization that needs to be deferred until
         * malloc is safe.
         */
        irongate_bus_mem_init2(&icp->ic_memt, 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...");
        }

        bzero(&pba, sizeof(pba));
        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_domain = pci_ndomains++;
        pba.pba_bus = 0;
#ifdef notyet
        pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED |
            PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY;
#endif
        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);
}