/*      $NetBSD: if_sf_pci.c,v 1.23 2022/09/24 18:12:42 thorpej Exp $   */

/*-
 * Copyright (c) 2001 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.
 */

/*
 * PCI bus front-end for the Adaptec AIC-6915 (``Starfire'')
 * 10/100 Ethernet controller.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_sf_pci.c,v 1.23 2022/09/24 18:12:42 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/device.h>

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

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

#include <dev/mii/miivar.h>

#include <dev/ic/aic6915reg.h>
#include <dev/ic/aic6915var.h>

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

struct sf_pci_softc {
        struct sf_softc sc_starfire;    /* read Starfire softc */

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

static int      sf_pci_match(device_t, cfdata_t, void *);
static void     sf_pci_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(sf_pci, sizeof(struct sf_pci_softc),
    sf_pci_match, sf_pci_attach, NULL, NULL);

struct sf_pci_product {
        uint32_t        spp_vendor;     /* PCI vendor ID */
        uint32_t        spp_product;    /* PCI product ID */
        const char      *spp_name;      /* product name */
        const struct sf_pci_product *spp_subsys; /* subsystm IDs */
};

static const struct sf_pci_product sf_subsys_adaptec[] = {
        /* ANA-62011 (rev 0) Single port 10/100 64-bit */
        { PCI_VENDOR_ADP,                       0x0008,
          "ANA-62011 (rev 0) 10/100 Ethernet",  NULL },

        /* ANA-62011 (rev 1) Single port 10/100 64-bit */
        { PCI_VENDOR_ADP,                       0x0009,
          "ANA-62011 (rev 1) 10/100 Ethernet",  NULL },

        /* ANA-62022 Dual port 10/100 64-bit */
        { PCI_VENDOR_ADP,                       0x0010,
          "ANA-62022 10/100 Ethernet",          NULL },

        /* ANA-62044 (rev 0) Quad port 10/100 64-bit */
        { PCI_VENDOR_ADP,                       0x0018,
          "ANA-62044 (rev 0) 10/100 Ethernet",  NULL },

        /* ANA-62044 (rev 1) Quad port 10/100 64-bit */
        { PCI_VENDOR_ADP,                       0x0019,
          "ANA-62044 (rev 1) 10/100 Ethernet",  NULL },

        /* ANA-62020 Single port 100baseFX 64-bit */
        { PCI_VENDOR_ADP,                       0x0020,
          "ANA-62020 100baseFX Ethernet",       NULL },

        /* ANA-69011 Single port 10/100 32-bit */
        { PCI_VENDOR_ADP,                       0x0028,
          "ANA-69011 10/100 Ethernet",          NULL },

        { 0,                                    0,
          NULL,                                 NULL },
};

static const struct sf_pci_product sf_pci_products[] = {
        { PCI_VENDOR_ADP,                       PCI_PRODUCT_ADP_AIC6915,
          "AIC-6915 10/100 Ethernet",           sf_subsys_adaptec },

        { 0,                                    0,
          NULL,                                 NULL },
};

static const struct sf_pci_product *
sf_pci_lookup(const struct pci_attach_args *pa)
{
        const struct sf_pci_product *spp, *subspp;
        pcireg_t subsysid;

        for (spp = sf_pci_products; spp->spp_name != NULL; spp++) {
                if (PCI_VENDOR(pa->pa_id) == spp->spp_vendor &&
                    PCI_PRODUCT(pa->pa_id) == spp->spp_product) {
                        subsysid = pci_conf_read(pa->pa_pc, pa->pa_tag,
                            PCI_SUBSYS_ID_REG);
                        for (subspp = spp->spp_subsys;
                             subspp->spp_name != NULL; subspp++) {
                                if (PCI_VENDOR(subsysid) ==
                                        subspp->spp_vendor ||
                                    PCI_PRODUCT(subsysid) ==
                                        subspp->spp_product) {
                                        return (subspp);
                                }
                        }
                        return (spp);
                }
        }

        return (NULL);
}

static int
sf_pci_match(device_t parent, cfdata_t match, void *aux)
{
        struct pci_attach_args *pa = aux;

        if (sf_pci_lookup(pa) != NULL)
                return (1);

        return (0);
}

static void
sf_pci_attach(device_t parent, device_t self, void *aux)
{
        struct sf_pci_softc *psc = device_private(self);
        struct sf_softc *sc = &psc->sc_starfire;
        struct pci_attach_args *pa = aux;
        pci_intr_handle_t ih;
        const char *intrstr = NULL;
        const struct sf_pci_product *spp;
        bus_space_tag_t iot, memt;
        bus_space_handle_t ioh, memh;
        pcireg_t reg;
        int error, ioh_valid, memh_valid;
        char intrbuf[PCI_INTRSTR_LEN];

        sc->sc_dev = self;
        spp = sf_pci_lookup(pa);
        if (spp == NULL) {
                printf("\n");
                panic("sf_pci_attach: impossible");
        }

        printf(": %s, rev. %d\n", spp->spp_name, PCI_REVISION(pa->pa_class));

        /* power up chip */
        if ((error = pci_activate(pa->pa_pc, pa->pa_tag, self, NULL)) &&
            error != EOPNOTSUPP) {
                aprint_error_dev(self, "cannot activate %d\n", error);
                return;
        }

        /*
         * Map the device.
         */
        reg = pci_mapreg_type(pa->pa_pc, pa->pa_tag, SF_PCI_MEMBA);
        switch (reg) {
        case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT:
        case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT:
                memh_valid = (pci_mapreg_map(pa, SF_PCI_MEMBA,
                    reg, 0, &memt, &memh, NULL, NULL) == 0);
                break;
        default:
                memh_valid = 0;
        }

        ioh_valid = (pci_mapreg_map(pa,
            (reg == (PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT)) ?
                SF_PCI_IOBA : SF_PCI_IOBA - 0x04,
            PCI_MAPREG_TYPE_IO, 0, &iot, &ioh, NULL, NULL) == 0);

        if (memh_valid) {
                sc->sc_st = memt;
                sc->sc_sh = memh;
                sc->sc_iomapped = 0;
        } else if (ioh_valid) {
                sc->sc_st = iot;
                sc->sc_sh = ioh;
                sc->sc_iomapped = 1;
        } else {
                aprint_error_dev(self, "unable to map device registers\n");
                return;
        }

        sc->sc_dmat = pa->pa_dmat;

        /* Make sure bus mastering is enabled. */
        pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
            pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
            PCI_COMMAND_MASTER_ENABLE);

        /*
         * Map and establish our interrupt.
         */
        if (pci_intr_map(pa, &ih)) {
                aprint_error_dev(self, "unable to map interrupt\n");
                return;
        }
        intrstr = pci_intr_string(pa->pa_pc, ih, intrbuf, sizeof(intrbuf));
        psc->sc_ih = pci_intr_establish_xname(pa->pa_pc, ih, IPL_NET, sf_intr,
            sc, device_xname(self));
        if (psc->sc_ih == NULL) {
                aprint_error_dev(self, "unable to establish interrupt");
                if (intrstr != NULL)
                        aprint_error(" at %s", intrstr);
                aprint_error("\n");
                return;
        }
        aprint_normal_dev(self, "interrupting at %s\n", intrstr);

        /*
         * Finish off the attach.
         */
        sf_attach(sc);
}