/*      $NetBSD: if_tlp_ap.c,v 1.16 2023/12/20 04:30:27 thorpej Exp $   */

/*
 * Copyright (c) 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Atsushi Onoe.
 *
 * 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_tlp_ap.c,v 1.16 2023/12/20 04:30:27 thorpej Exp $");

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

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

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

#include <mips/cache.h>

#include <dev/mii/miivar.h>
#include <dev/mii/mii_bitbang.h>

#include <dev/ic/tulipreg.h>
#include <dev/ic/tulipvar.h>

#include <newsmips/apbus/apbusvar.h>

#define TLP_AP_ROM      0x00000000      /* AProm entry address */
#define TLP_AP_CFG      0x00040000      /* PCI configuration registers */
#define         TLP_AP_CFG_CFID 0x00            /* Identification */
#define         TLP_AP_CFG_CFCS 0x04            /* Command and status */
#define         TLP_AP_CFG_CFRV 0x08            /* Revision */
#define         TLP_AP_CFG_CFLT 0x0c            /* Latency timer */
#define         TLP_AP_CFG_CBIO 0x10            /* Base I/O address */
#define         TLP_AP_CFG_CBMA 0x14            /* Base memory address */
#define         TLP_AP_CFG_CFIT 0x3c            /* Interrupt */
#define TLP_AP_CSR      0x00080000      /* CSR base address */
#define TLP_AP_RST      0x00100000      /* Board Reset */


struct tulip_ap_softc {
        struct tulip_softc sc_tulip;    /* real Tulip softc */
        bus_space_tag_t sc_cfst;
        bus_space_handle_t sc_cfsh;
};

static int      tlp_ap_match(device_t, cfdata_t, void *);
static void     tlp_ap_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(tlp_ap, sizeof(struct tulip_ap_softc),
    tlp_ap_match, tlp_ap_attach, NULL, NULL);

static void tlp_ap_preinit(struct tulip_softc *);
static void tlp_ap_tmsw_init(struct tulip_softc *);
static void tlp_ap_getmedia(struct tulip_softc *, struct ifmediareq *);
static int tlp_ap_setmedia(struct tulip_softc *);

const struct tulip_mediasw tlp_ap_mediasw = {
        tlp_ap_tmsw_init, tlp_ap_getmedia, tlp_ap_setmedia
};

static int
tlp_ap_match(device_t parent, cfdata_t cf, void *aux)
{
        struct apbus_attach_args *apa = aux;

        if (strcmp(apa->apa_name, "cbasetx") != 0)
                return 0;

        return 1;
}

/*
 * Install interface into kernel networking data structures
 */
static void
tlp_ap_attach(device_t parent, device_t self, void *aux)
{
        struct tulip_ap_softc *psc = device_private(self);
        struct tulip_softc *sc = &psc->sc_tulip;
        struct apbus_attach_args *apa = aux;
        uint8_t enaddr[ETHER_ADDR_LEN];
        u_int intrmask;
        int i;

        sc->sc_dev = self;

        aprint_normal(" slot%d addr 0x%lx", apa->apa_slotno, apa->apa_hwbase);

        /* PCI configuration register */
        psc->sc_cfst = 0;
        psc->sc_cfsh = apa->apa_hwbase + TLP_AP_CFG;
        sc->sc_devno = apa->apa_slotno;
        sc->sc_rev = bus_space_read_4(psc->sc_cfst, psc->sc_cfsh,
            TLP_AP_CFG_CFRV);
        switch (bus_space_read_4(psc->sc_cfst, psc->sc_cfsh, TLP_AP_CFG_CFID)) {
        case 0x00091011:
                if (sc->sc_rev >= 0x20)
                        sc->sc_chip = TULIP_CHIP_21140A;
                else
                        sc->sc_chip = TULIP_CHIP_21140;
                break;
        default:
                aprint_error(": unable to handle your board\n");
                return;
        }

        aprint_normal(": %s Ethernet, pass %d.%d\n",
            tlp_chip_name(sc->sc_chip),
            (sc->sc_rev >> 4) & 0xf, sc->sc_rev & 0xf);

        /* CSR */
        sc->sc_st = 0;
        sc->sc_sh = apa->apa_hwbase + TLP_AP_CSR;
        sc->sc_dmat = apbus_dmatag_init(apa);
        if (sc->sc_dmat == NULL) {
                aprint_error_dev(self, "cannot allocate memory\n");
                return;
        }

        /*
         * Initialize bus specific parameters.
         */
        if (mips_cache_info.mci_sdcache_line_size > 0)
                sc->sc_cacheline = mips_cache_info.mci_sdcache_line_size / 4;
        else if (mips_cache_info.mci_pdcache_line_size > 0)
                sc->sc_cacheline = mips_cache_info.mci_pdcache_line_size / 4;
        else
                sc->sc_cacheline = 4;
        sc->sc_maxburst = sc->sc_cacheline;             /* XXX */
        sc->sc_regshift = 3;
        sc->sc_flags |= TULIPF_DBO | TULIPF_BLE;        /* Big Endian BUS */
        sc->sc_flags |= TULIPF_ENABLED;                 /* No Power Mgmt */

        /*
         * Reset hardware.
         */
        bus_space_write_4(0, apa->apa_hwbase + TLP_AP_RST, 0, 1);
        delay(100);

        /*
         * Initialize PCI configuration register
         */
        bus_space_write_4(psc->sc_cfst, psc->sc_cfsh,
            TLP_AP_CFG_CFCS, 0x00000005);       /* Master, IO */
        bus_space_write_4(psc->sc_cfst, psc->sc_cfsh,
            TLP_AP_CFG_CFLT, 0x00000100);
        bus_space_write_4(psc->sc_cfst, psc->sc_cfsh,
            TLP_AP_CFG_CBIO, MIPS_KSEG1_TO_PHYS(sc->sc_sh));
        bus_space_write_4(psc->sc_cfst, psc->sc_cfsh,
            TLP_AP_CFG_CFIT, 0x00000101);

        /*
         * Initialize general purpose port register.
         */
        TULIP_WRITE(sc, CSR_GPP, GPP_GPC | 0xc0);       /* read */
        TULIP_WRITE(sc, CSR_GPP, 0x40);                 /* dipsw port on */
        i = TULIP_READ(sc, CSR_GPP) & GPP_MD;           /* dipsw contents */
        TULIP_WRITE(sc, CSR_GPP, 0xc0);                 /* dipsw port off */
        TULIP_WRITE(sc, CSR_GPP, GPP_GPC | 0xcf);       /* read write */
        if (sc->sc_maxburst == 16) {
                TULIP_WRITE(sc, CSR_GPP, 0x8f);         /* 16word burst */
                TULIP_WRITE(sc, CSR_GPP, 0xcf);
        } else {
                TULIP_WRITE(sc, CSR_GPP, 0x8e);         /* 8word burst */
                TULIP_WRITE(sc, CSR_GPP, 0xce);
        }
        TULIP_WRITE(sc, CSR_GPP, GPP_GPC | 0xcf);       /* read write */
        TULIP_WRITE(sc, CSR_GPP, 0xc3);                 /* mask abort/DMA err */
        TULIP_WRITE(sc, CSR_GPP, 0xcf);                 /* mask abort/DMA err */

        if (tlp_read_srom(sc) == 0) {
                aprint_error_dev(self, "srom read failed\n");
                free(sc->sc_dmat, M_DEVBUF);
                return;
        }
        for (i = 0; i < ETHER_ADDR_LEN; i++)
                enaddr[i] = sc->sc_srom[0x11 + i * 2];

        sc->sc_mediasw = &tlp_ap_mediasw;

        /*
         * Finish off the attach.
         */
        tlp_attach(sc, enaddr);

        intrmask = SLOTTOMASK(apa->apa_slotno);
        apbus_intr_establish(0, /* interrupt level (0 or 1) */
            intrmask,
            0, /* priority */
            tlp_intr, sc, device_xname(self), apa->apa_ctlnum);
}

static void
tlp_ap_preinit(struct tulip_softc *sc)
{

        sc->sc_opmode |= OPMODE_MBO | OPMODE_SCR | OPMODE_PCS | OPMODE_HBD |
            OPMODE_PS;
        TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
}

static void
tlp_ap_tmsw_init(struct tulip_softc *sc)
{
        struct ifnet *ifp = &sc->sc_ethercom.ec_if;
        struct mii_data *mii = &sc->sc_mii;

        sc->sc_preinit = tlp_ap_preinit;

        mii->mii_ifp = ifp;
        mii->mii_readreg = NULL;
        mii->mii_writereg = NULL;
        mii->mii_statchg = sc->sc_statchg;
        ifmedia_init(&mii->mii_media, 0, tlp_mediachange, tlp_mediastatus);
        ifmedia_add(&mii->mii_media, IFM_ETHER | IFM_100_TX, 0, NULL);
        ifmedia_add(&mii->mii_media, IFM_ETHER | IFM_100_TX | IFM_FDX, 0,
            NULL);
        ifmedia_set(&mii->mii_media, IFM_ETHER | IFM_100_TX);
}

static void
tlp_ap_getmedia(struct tulip_softc *sc, struct ifmediareq *ifmr)
{
        struct ifnet *ifp = &sc->sc_ethercom.ec_if;

        ifmr->ifm_status = IFM_AVALID;
        if (ifp->if_flags & IFF_RUNNING)
                ifmr->ifm_status |= IFM_ACTIVE;
        ifmr->ifm_active = sc->sc_mii.mii_media_active;
}

static int
tlp_ap_setmedia(struct tulip_softc *sc)
{
        struct ifnet *ifp = &sc->sc_ethercom.ec_if;

        sc->sc_mii.mii_media_active = sc->sc_mii.mii_media.ifm_cur->ifm_media;

        if (ifp->if_flags & IFF_UP)
                tlp_idle(sc, OPMODE_ST | OPMODE_SR);
        if (sc->sc_mii.mii_media_active & IFM_FDX)
                sc->sc_opmode |= OPMODE_FD;
        else
                sc->sc_opmode &= ~OPMODE_FD;
        if (ifp->if_flags & IFF_UP)
                TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
        return 0;
}