/*      $NetBSD: dl10019.c,v 1.17 2021/07/01 20:39:15 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: dl10019.c,v 1.17 2021/07/01 20:39:15 thorpej Exp $");

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

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

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

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

#include <dev/ic/dp8390reg.h>
#include <dev/ic/dp8390var.h>

#include <dev/ic/ne2000reg.h>
#include <dev/ic/ne2000var.h>

#include <dev/ic/dl10019reg.h>
#include <dev/ic/dl10019var.h>

int     dl10019_mii_readreg(device_t, int, int, uint16_t *);
int     dl10019_mii_writereg(device_t, int, int, uint16_t);
void    dl10019_mii_statchg(struct ifnet *);

/*
* MII bit-bang glue.
*/
u_int32_t dl10019_mii_bitbang_read(device_t);
void dl10019_mii_bitbang_write(device_t, u_int32_t);

const struct mii_bitbang_ops dl10019_mii_bitbang_ops = {
       dl10019_mii_bitbang_read,
       dl10019_mii_bitbang_write,
       {
               DL0_GPIO_MII_DATAOUT,   /* MII_BIT_MDO */
               DL0_GPIO_MII_DATAIN,    /* MII_BIT_MDI */
               DL0_GPIO_MII_CLK,       /* MII_BIT_MDC */
               DL0_19_GPIO_MII_DIROUT, /* MII_BIT_DIR_HOST_PHY */
               0,                      /* MII_BIT_DIR_PHY_HOST */
       }
};

const struct mii_bitbang_ops dl10022_mii_bitbang_ops = {
       dl10019_mii_bitbang_read,
       dl10019_mii_bitbang_write,
       {
               DL0_GPIO_MII_DATAOUT,   /* MII_BIT_MDO */
               DL0_GPIO_MII_DATAIN,    /* MII_BIT_MDI */
               DL0_GPIO_MII_CLK,       /* MII_BIT_MDC */
               DL0_22_GPIO_MII_DIROUT, /* MII_BIT_DIR_HOST_PHY */
               0,                      /* MII_BIT_DIR_PHY_HOST */
       }
};

static void
dl10019_mii_reset(struct dp8390_softc *sc)
{
       struct ne2000_softc *nsc = (void *) sc;
       int i;

       if (nsc->sc_type != NE2000_TYPE_DL10022)
               return;

       for (i = 0; i < 2; i++) {
               bus_space_write_1(sc->sc_regt, sc->sc_regh, NEDL_DL0_GPIO,
                   0x08);
               delay(1);
               bus_space_write_1(sc->sc_regt, sc->sc_regh, NEDL_DL0_GPIO,
                   0x0c);
               delay(1);
       }
       bus_space_write_1(sc->sc_regt, sc->sc_regh, NEDL_DL0_GPIO, 0x00);
}

static void
dl10019_tick(void *arg)
{
       struct dp8390_softc *sc = arg;
       int s;

       s = splnet();
       mii_tick(&sc->sc_mii);
       splx(s);

       callout_schedule(&sc->sc_tick_ch, hz);
}

void
dl10019_media_init(struct dp8390_softc *sc)
{
       struct ifnet *ifp = &sc->sc_ec.ec_if;
       struct mii_data *mii = &sc->sc_mii;

       callout_setfunc(&sc->sc_tick_ch, dl10019_tick, sc);

       sc->sc_ec.ec_mii = mii;

       mii->mii_ifp = ifp;
       mii->mii_readreg = dl10019_mii_readreg;
       mii->mii_writereg = dl10019_mii_writereg;
       mii->mii_statchg = dl10019_mii_statchg;
       ifmedia_init(&mii->mii_media, IFM_IMASK, dp8390_mediachange,
           dp8390_mediastatus);

       dl10019_mii_reset(sc);

       mii_attach(sc->sc_dev, mii, 0xffffffff, MII_PHY_ANY,
           MII_OFFSET_ANY, 0);

       if (LIST_FIRST(&mii->mii_phys) == NULL) {
               ifmedia_add(&mii->mii_media, IFM_ETHER | IFM_NONE, 0, NULL);
               ifmedia_set(&mii->mii_media, IFM_ETHER | IFM_NONE);
       } else
               ifmedia_set(&mii->mii_media, IFM_ETHER | IFM_AUTO);
}

void
dl10019_media_fini(struct dp8390_softc *sc)
{

       callout_stop(&sc->sc_tick_ch);
       mii_detach(&sc->sc_mii, MII_PHY_ANY, MII_OFFSET_ANY);
       /* dp8390_detach() will call ifmedia_fini(). */
}

int
dl10019_mediachange(struct dp8390_softc *sc)
{
       int rc;

       if ((rc = mii_mediachg(&sc->sc_mii)) == ENXIO)
               return 0;
       return rc;
}

void
dl10019_mediastatus(struct dp8390_softc *sc, struct ifmediareq *ifmr)
{

       mii_pollstat(&sc->sc_mii);
       ifmr->ifm_status = sc->sc_mii.mii_media_status;
       ifmr->ifm_active = sc->sc_mii.mii_media_active;
}

void
dl10019_init_card(struct dp8390_softc *sc)
{

       dl10019_mii_reset(sc);
       mii_mediachg(&sc->sc_mii);
       callout_schedule(&sc->sc_tick_ch, hz);
}

void
dl10019_stop_card(struct dp8390_softc *sc)
{

       callout_stop(&sc->sc_tick_ch);
       mii_down(&sc->sc_mii);
}

u_int32_t
dl10019_mii_bitbang_read(device_t self)
{
       struct dp8390_softc *sc = device_private(self);

       /* We're already in Page 0. */
       return (bus_space_read_1(sc->sc_regt, sc->sc_regh, NEDL_DL0_GPIO) &
           ~DL0_GPIO_PRESERVE);
}

void
dl10019_mii_bitbang_write(device_t self, u_int32_t val)
{
       struct dp8390_softc *sc = device_private(self);
       u_int8_t gpio;

       /* We're already in Page 0. */
       gpio = bus_space_read_1(sc->sc_regt, sc->sc_regh, NEDL_DL0_GPIO);
       bus_space_write_1(sc->sc_regt, sc->sc_regh, NEDL_DL0_GPIO,
           (val & ~DL0_GPIO_PRESERVE) | (gpio & DL0_GPIO_PRESERVE));
}

int
dl10019_mii_readreg(device_t self, int phy, int reg, uint16_t *val)
{
       struct ne2000_softc *nsc = device_private(self);
       const struct mii_bitbang_ops *ops;

       ops = (nsc->sc_type == NE2000_TYPE_DL10022) ?
           &dl10022_mii_bitbang_ops : &dl10019_mii_bitbang_ops;

       return mii_bitbang_readreg(self, ops, phy, reg, val);
}

int
dl10019_mii_writereg(device_t self, int phy, int reg, uint16_t val)
{
       struct ne2000_softc *nsc = device_private(self);
       const struct mii_bitbang_ops *ops;

       ops = (nsc->sc_type == NE2000_TYPE_DL10022) ?
           &dl10022_mii_bitbang_ops : &dl10019_mii_bitbang_ops;

       return mii_bitbang_writereg(self, ops, phy, reg, val);
}

void
dl10019_mii_statchg(struct ifnet *ifp)
{
       struct ne2000_softc *nsc = ifp->if_softc;
       struct dp8390_softc *sc = &nsc->sc_dp8390;

       /*
        * Disable collision detection on the DL10022 if
        * we are on a full-duplex link.
        */
       if (nsc->sc_type == NE2000_TYPE_DL10022) {
               u_int8_t diag;

               if (sc->sc_mii.mii_media_active & IFM_FDX)
                       diag = DL0_DIAG_NOCOLLDETECT;
               else
                       diag = 0;
               bus_space_write_1(sc->sc_regt, sc->sc_regh,
                   NEDL_DL0_DIAG, diag);
       }
}

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