/*      $OpenBSD: if_pgt_pci.c,v 1.20 2024/05/24 06:02:56 jsg Exp $  */

/*
 * Copyright (c) 2006 Marcus Glocker <mglocker@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * PCI front-end for the PrismGT
 */

#include "bpfilter.h"

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

#include <machine/bus.h>

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

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

#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>

#include <dev/ic/pgtreg.h>
#include <dev/ic/pgtvar.h>

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

/* Base Address Register */
#define PGT_PCI_BAR0    0x10

int     pgt_pci_match(struct device *, void *, void *);
void    pgt_pci_attach(struct device *, struct device *, void *);
int     pgt_pci_detach(struct device *, int);

struct pgt_pci_softc {
        struct pgt_softc        sc_pgt;

        pci_chipset_tag_t       sc_pc;
        void                    *sc_ih;
        bus_size_t              sc_mapsize;
};

const struct cfattach pgt_pci_ca = {
        sizeof(struct pgt_pci_softc), pgt_pci_match, pgt_pci_attach,
        pgt_pci_detach, pgt_activate
};

const struct pci_matchid pgt_pci_devices[] = {
        { PCI_VENDOR_INTERSIL, PCI_PRODUCT_INTERSIL_ISL3877 },
        { PCI_VENDOR_INTERSIL, PCI_PRODUCT_INTERSIL_ISL3890 },
        { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3CRWE154G72 }
};

int
pgt_pci_match(struct device *parent, void *match, void *aux)
{
        return (pci_matchbyid((struct pci_attach_args *)aux, pgt_pci_devices,
            sizeof(pgt_pci_devices) / sizeof(pgt_pci_devices[0])));
}

void
pgt_pci_attach(struct device *parent, struct device *self, void *aux)
{
        struct pgt_pci_softc *psc = (struct pgt_pci_softc *)self;
        struct pgt_softc *sc = &psc->sc_pgt;
        struct pci_attach_args *pa = aux;
        const char *intrstr = NULL;
        pci_intr_handle_t ih;
        int error;

        sc->sc_dmat = pa->pa_dmat;
        psc->sc_pc = pa->pa_pc;

        /* remember chipset */
        if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTERSIL_ISL3877)
                sc->sc_flags |= SC_ISL3877;

        /* map control / status registers */
        error = pci_mapreg_map(pa, PGT_PCI_BAR0,
            PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT, 0,
            &sc->sc_iotag, &sc->sc_iohandle, NULL, &psc->sc_mapsize, 0);
        if (error != 0) {
                printf(": can't map mem space\n");
                return;
        }

        /* map interrupt */
        if (pci_intr_map(pa, &ih) != 0) {
                printf(": can't map interrupt\n");
                return;
        }

        /* disable all interrupts */
        bus_space_write_4(sc->sc_iotag, sc->sc_iohandle, PGT_REG_INT_EN, 0);
        (void)bus_space_read_4(sc->sc_iotag, sc->sc_iohandle, PGT_REG_INT_EN);
        DELAY(PGT_WRITEIO_DELAY);

        /* establish interrupt */
        intrstr = pci_intr_string(psc->sc_pc, ih);
        psc->sc_ih = pci_intr_establish(psc->sc_pc, ih, IPL_NET, pgt_intr, sc,
            sc->sc_dev.dv_xname);
        if (psc->sc_ih == NULL) {
                printf(": can't establish interrupt");
                if (intrstr != NULL)
                        printf(" at %s", intrstr);
                printf("\n");
                return;
        }
        printf(": %s\n", intrstr);

        config_mountroot(self, pgt_attach);
}

int
pgt_pci_detach(struct device *self, int flags)
{
        struct pgt_pci_softc *psc = (struct pgt_pci_softc *)self;
        struct pgt_softc *sc = &psc->sc_pgt;

        if (psc->sc_ih != NULL) {
                pgt_detach(sc);
                pci_intr_disestablish(psc->sc_pc, psc->sc_ih);
        }
        if (psc->sc_mapsize > 0)
                bus_space_unmap(sc->sc_iotag, sc->sc_iohandle,
                    psc->sc_mapsize);

        return (0);
}