/*      $OpenBSD: if_epic_pci.c,v 1.18 2024/05/24 06:02:53 jsg Exp $    */
/*      $NetBSD: if_epic_pci.c,v 1.28 2005/02/27 00:27:32 perry Exp $   */

/*-
 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
 * NASA Ames Research Center.
 *
 * 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.
 */

/*
 * PCI bus front-end for the Standard Microsystems Corp. 83C170
 * Ethernet PCI Integrated Controller (EPIC/100) driver.
 */

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

#include <net/if.h>
#include <net/if_media.h>

#include <netinet/in.h>
#include <netinet/if_ether.h>

#include <machine/bus.h>
#include <machine/intr.h>

#include <dev/mii/miivar.h>

#include <dev/ic/smc83c170reg.h>
#include <dev/ic/smc83c170var.h>

#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>

/*
 * PCI configuration space registers used by the EPIC.
 */
#define EPIC_PCI_IOBA           0x10    /* i/o mapped base */
#define EPIC_PCI_MMBA           0x14    /* memory mapped base */

struct epic_pci_softc {
        struct epic_softc sc_epic;      /* real EPIC softc */

        /* PCI-specific goo. */
        void    *sc_ih;                 /* interrupt handle */
};

int     epic_pci_match(struct device *, void *, void *);
void    epic_pci_attach(struct device *, struct device *, void *);

const struct cfattach epic_pci_ca = {
        sizeof(struct epic_pci_softc), epic_pci_match, epic_pci_attach
};

const struct pci_matchid epic_pci_devices[] = {
        { PCI_VENDOR_SMC, PCI_PRODUCT_SMC_83C170 },
        { PCI_VENDOR_SMC, PCI_PRODUCT_SMC_83C175 },
};

static const struct epic_pci_subsys_info {
        pcireg_t subsysid;
        int flags;
} epic_pci_subsys_info[] = {
        { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa015), /* SMC9432BTX */
          EPIC_HAS_BNC },
        { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa024), /* SMC9432BTX1 */
          EPIC_HAS_BNC },
        { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa016), /* SMC9432FTX */
          EPIC_HAS_MII_FIBER | EPIC_DUPLEXLED_ON_694 },
        { 0xffffffff,
          0 }
};

static const struct epic_pci_subsys_info *
epic_pci_subsys_lookup(const struct pci_attach_args *pa)
{
        pci_chipset_tag_t pc = pa->pa_pc;
        pcireg_t reg;
        const struct epic_pci_subsys_info *esp;

        reg = pci_conf_read(pc, pa->pa_tag, PCI_SUBSYS_ID_REG);

        for (esp = epic_pci_subsys_info; esp->subsysid != 0xffffffff; esp++)
                if (esp->subsysid == reg)
                        return (esp);

        return (NULL);
}

int
epic_pci_match(struct device *parent, void *match, void *aux)
{
        return (pci_matchbyid((struct pci_attach_args *)aux, epic_pci_devices,
            nitems(epic_pci_devices)));
}

void
epic_pci_attach(struct device *parent, struct device *self, void *aux)
{
        struct epic_pci_softc *psc = (struct epic_pci_softc *)self;
        struct epic_softc *sc = &psc->sc_epic;
        struct pci_attach_args *pa = aux;
        pci_chipset_tag_t pc = pa->pa_pc;
        pci_intr_handle_t ih;
        const char *intrstr = NULL;
        const struct epic_pci_subsys_info *esp;
        bus_space_tag_t iot, memt;
        bus_space_handle_t ioh, memh;
        int ioh_valid, memh_valid;

        pci_set_powerstate(pc, pa->pa_tag, PCI_PMCSR_STATE_D0);

        /*
         * Map the device.
         */
        ioh_valid = (pci_mapreg_map(pa, EPIC_PCI_IOBA,
            PCI_MAPREG_TYPE_IO, 0,
            &iot, &ioh, NULL, NULL, 0) == 0);
        memh_valid = (pci_mapreg_map(pa, EPIC_PCI_MMBA,
            PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0,
            &memt, &memh, NULL, NULL, 0) == 0);

        if (memh_valid) {
                sc->sc_st = memt;
                sc->sc_sh = memh;
        } else if (ioh_valid) {
                sc->sc_st = iot;
                sc->sc_sh = ioh;
        } else {
                printf(": unable to map device registers\n");
                return;
        }

        sc->sc_dmat = pa->pa_dmat;

        /*
         * Map and establish our interrupt.
         */
        if (pci_intr_map(pa, &ih)) {
                printf(": unable to map interrupt\n");
                return;
        }
        intrstr = pci_intr_string(pc, ih);
        psc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, epic_intr, sc,
            self->dv_xname);
        if (psc->sc_ih == NULL) {
                printf(": unable to establish interrupt");
                if (intrstr != NULL)
                        printf(" at %s", intrstr);
                printf("\n");
                return;
        }

        esp = epic_pci_subsys_lookup(pa);
        if (esp)
                sc->sc_hwflags = esp->flags;

        /*
         * Finish off the attach.
         */
        epic_attach(sc, intrstr);
}