/*-
 * Copyright (c) 2011-2012 Semihalf.
 * All rights reserved.
 *
 * 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 AUTHOR 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 AUTHOR 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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/sockio.h>

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

#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_arp.h>

#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/openfirm.h>

#include "miibus_if.h"

#include <contrib/ncsw/inc/integrations/dpaa_integration_ext.h>
#include <contrib/ncsw/inc/Peripherals/fm_mac_ext.h>
#include <contrib/ncsw/inc/Peripherals/fm_port_ext.h>
#include <contrib/ncsw/inc/flib/fsl_fman_dtsec.h>
#include <contrib/ncsw/inc/xx_ext.h>

#include "fman.h"
#include "if_dtsec.h"
#include "if_dtsec_im.h"
#include "if_dtsec_rm.h"

#define DTSEC_MIN_FRAME_SIZE    64
#define DTSEC_MAX_FRAME_SIZE    9600

#define DTSEC_REG_MAXFRM        0x110
#define DTSEC_REG_GADDR(i)      (0x0a0 + 4*(i))

/**
 * @group dTSEC private defines.
 * @{
 */
/**
 * dTSEC FMan MAC exceptions info struct.
 */
struct dtsec_fm_mac_ex_str {
        const int num;
        const char *str;
};
/** @} */


/**
 * @group FMan MAC routines.
 * @{
 */
#define DTSEC_MAC_EXCEPTIONS_END        (-1)

/**
 * FMan MAC exceptions.
 */
static const struct dtsec_fm_mac_ex_str dtsec_fm_mac_exceptions[] = {
        { e_FM_MAC_EX_10G_MDIO_SCAN_EVENTMDIO, "MDIO scan event" },
        { e_FM_MAC_EX_10G_MDIO_CMD_CMPL, "MDIO command completion" },
        { e_FM_MAC_EX_10G_REM_FAULT, "Remote fault" },
        { e_FM_MAC_EX_10G_LOC_FAULT, "Local fault" },
        { e_FM_MAC_EX_10G_1TX_ECC_ER, "Transmit frame ECC error" },
        { e_FM_MAC_EX_10G_TX_FIFO_UNFL, "Transmit FIFO underflow" },
        { e_FM_MAC_EX_10G_TX_FIFO_OVFL, "Receive FIFO overflow" },
        { e_FM_MAC_EX_10G_TX_ER, "Transmit frame error" },
        { e_FM_MAC_EX_10G_RX_FIFO_OVFL, "Receive FIFO overflow" },
        { e_FM_MAC_EX_10G_RX_ECC_ER, "Receive frame ECC error" },
        { e_FM_MAC_EX_10G_RX_JAB_FRM, "Receive jabber frame" },
        { e_FM_MAC_EX_10G_RX_OVRSZ_FRM, "Receive oversized frame" },
        { e_FM_MAC_EX_10G_RX_RUNT_FRM, "Receive runt frame" },
        { e_FM_MAC_EX_10G_RX_FRAG_FRM, "Receive fragment frame" },
        { e_FM_MAC_EX_10G_RX_LEN_ER, "Receive payload length error" },
        { e_FM_MAC_EX_10G_RX_CRC_ER, "Receive CRC error" },
        { e_FM_MAC_EX_10G_RX_ALIGN_ER, "Receive alignment error" },
        { e_FM_MAC_EX_1G_BAB_RX, "Babbling receive error" },
        { e_FM_MAC_EX_1G_RX_CTL, "Receive control (pause frame) interrupt" },
        { e_FM_MAC_EX_1G_GRATEFUL_TX_STP_COMPLET, "Graceful transmit stop "
            "complete" },
        { e_FM_MAC_EX_1G_BAB_TX, "Babbling transmit error" },
        { e_FM_MAC_EX_1G_TX_CTL, "Transmit control (pause frame) interrupt" },
        { e_FM_MAC_EX_1G_TX_ERR, "Transmit error" },
        { e_FM_MAC_EX_1G_LATE_COL, "Late collision" },
        { e_FM_MAC_EX_1G_COL_RET_LMT, "Collision retry limit" },
        { e_FM_MAC_EX_1G_TX_FIFO_UNDRN, "Transmit FIFO underrun" },
        { e_FM_MAC_EX_1G_MAG_PCKT, "Magic Packet detected when dTSEC is in "
            "Magic Packet detection mode" },
        { e_FM_MAC_EX_1G_MII_MNG_RD_COMPLET, "MII management read completion" },
        { e_FM_MAC_EX_1G_MII_MNG_WR_COMPLET, "MII management write completion" },
        { e_FM_MAC_EX_1G_GRATEFUL_RX_STP_COMPLET, "Graceful receive stop "
            "complete" },
        { e_FM_MAC_EX_1G_TX_DATA_ERR, "Internal data error on transmit" },
        { e_FM_MAC_EX_1G_RX_DATA_ERR, "Internal data error on receive" },
        { e_FM_MAC_EX_1G_1588_TS_RX_ERR, "Time-Stamp Receive Error" },
        { e_FM_MAC_EX_1G_RX_MIB_CNT_OVFL, "MIB counter overflow" },
        { DTSEC_MAC_EXCEPTIONS_END, "" }
};

static const char *
dtsec_fm_mac_ex_to_str(e_FmMacExceptions exception)
{
        int i;

        for (i = 0; dtsec_fm_mac_exceptions[i].num != exception &&
            dtsec_fm_mac_exceptions[i].num != DTSEC_MAC_EXCEPTIONS_END; ++i)
                ;

        if (dtsec_fm_mac_exceptions[i].num == DTSEC_MAC_EXCEPTIONS_END)
                return ("<Unknown Exception>");

        return (dtsec_fm_mac_exceptions[i].str);
}

static void
dtsec_fm_mac_mdio_event_callback(t_Handle h_App,
    e_FmMacExceptions exception)
{
        struct dtsec_softc *sc;

        sc = h_App;
        device_printf(sc->sc_dev, "MDIO event %i: %s.\n", exception,
            dtsec_fm_mac_ex_to_str(exception));
}

static void
dtsec_fm_mac_exception_callback(t_Handle app, e_FmMacExceptions exception)
{
        struct dtsec_softc *sc;

        sc = app;
        device_printf(sc->sc_dev, "MAC exception %i: %s.\n", exception,
            dtsec_fm_mac_ex_to_str(exception));
}

static void
dtsec_fm_mac_free(struct dtsec_softc *sc)
{
        if (sc->sc_mach == NULL)
                return;

        FM_MAC_Disable(sc->sc_mach, e_COMM_MODE_RX_AND_TX);
        FM_MAC_Free(sc->sc_mach);
        sc->sc_mach = NULL;
}

static int
dtsec_fm_mac_init(struct dtsec_softc *sc, uint8_t *mac)
{
        t_FmMacParams params;
        t_Error error;

        memset(&params, 0, sizeof(params));
        memcpy(&params.addr, mac, sizeof(params.addr));

        params.baseAddr = rman_get_bushandle(sc->sc_mem);
        params.enetMode = sc->sc_mac_enet_mode;
        params.macId = sc->sc_eth_id;
        params.mdioIrq = sc->sc_mac_mdio_irq;
        params.f_Event = dtsec_fm_mac_mdio_event_callback;
        params.f_Exception = dtsec_fm_mac_exception_callback;
        params.h_App = sc;
        params.h_Fm = sc->sc_fmh;

        sc->sc_mach = FM_MAC_Config(&params);
        if (sc->sc_mach == NULL) {
                device_printf(sc->sc_dev, "couldn't configure FM_MAC module.\n"
                    );
                return (ENXIO);
        }

        error = FM_MAC_ConfigResetOnInit(sc->sc_mach, TRUE);
        if (error != E_OK) {
                device_printf(sc->sc_dev, "couldn't enable reset on init "
                    "feature.\n");
                dtsec_fm_mac_free(sc);
                return (ENXIO);
        }

        /* Do not inform about pause frames */
        error = FM_MAC_ConfigException(sc->sc_mach, e_FM_MAC_EX_1G_RX_CTL,
            FALSE);
        if (error != E_OK) {
                device_printf(sc->sc_dev, "couldn't disable pause frames "
                        "exception.\n");
                dtsec_fm_mac_free(sc);
                return (ENXIO);
        }

        error = FM_MAC_Init(sc->sc_mach);
        if (error != E_OK) {
                device_printf(sc->sc_dev, "couldn't initialize FM_MAC module."
                    "\n");
                dtsec_fm_mac_free(sc);
                return (ENXIO);
        }

        return (0);
}
/** @} */


/**
 * @group FMan PORT routines.
 * @{
 */
static const char *
dtsec_fm_port_ex_to_str(e_FmPortExceptions exception)
{

        switch (exception) {
        case e_FM_PORT_EXCEPTION_IM_BUSY:
                return ("IM: RX busy");
        default:
                return ("<Unknown Exception>");
        }
}

void
dtsec_fm_port_rx_exception_callback(t_Handle app,
    e_FmPortExceptions exception)
{
        struct dtsec_softc *sc;

        sc = app;
        device_printf(sc->sc_dev, "RX exception: %i: %s.\n", exception,
            dtsec_fm_port_ex_to_str(exception));
}

void
dtsec_fm_port_tx_exception_callback(t_Handle app,
    e_FmPortExceptions exception)
{
        struct dtsec_softc *sc;

        sc = app;
        device_printf(sc->sc_dev, "TX exception: %i: %s.\n", exception,
            dtsec_fm_port_ex_to_str(exception));
}

e_FmPortType
dtsec_fm_port_rx_type(enum eth_dev_type type)
{
        switch (type) {
        case ETH_DTSEC:
                return (e_FM_PORT_TYPE_RX);
        case ETH_10GSEC:
                return (e_FM_PORT_TYPE_RX_10G);
        default:
                return (e_FM_PORT_TYPE_DUMMY);
        }
}

e_FmPortType
dtsec_fm_port_tx_type(enum eth_dev_type type)
{

        switch (type) {
        case ETH_DTSEC:
                return (e_FM_PORT_TYPE_TX);
        case ETH_10GSEC:
                return (e_FM_PORT_TYPE_TX_10G);
        default:
                return (e_FM_PORT_TYPE_DUMMY);
        }
}

static void
dtsec_fm_port_free_both(struct dtsec_softc *sc)
{
        if (sc->sc_rxph) {
                FM_PORT_Free(sc->sc_rxph);
                sc->sc_rxph = NULL;
        }

        if (sc->sc_txph) {
                FM_PORT_Free(sc->sc_txph);
                sc->sc_txph = NULL;
        }
}
/** @} */


/**
 * @group IFnet routines.
 * @{
 */
static int
dtsec_set_mtu(struct dtsec_softc *sc, unsigned int mtu)
{

        mtu += ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN + ETHER_CRC_LEN;

        DTSEC_LOCK_ASSERT(sc);

        if (mtu >= DTSEC_MIN_FRAME_SIZE && mtu <= DTSEC_MAX_FRAME_SIZE) {
                bus_write_4(sc->sc_mem, DTSEC_REG_MAXFRM, mtu);
                return (mtu);
        }

        return (0);
}

static u_int
dtsec_hash_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt)
{
        struct dtsec_softc *sc = arg;

        FM_MAC_AddHashMacAddr(sc->sc_mach, (t_EnetAddr *)LLADDR(sdl));

        return (1);
}

static void
dtsec_setup_multicast(struct dtsec_softc *sc)
{
        int i;

        if (if_getflags(sc->sc_ifnet) & IFF_ALLMULTI) {
                for (i = 0; i < 8; i++)
                        bus_write_4(sc->sc_mem, DTSEC_REG_GADDR(i), 0xFFFFFFFF);

                return;
        }

        fman_dtsec_reset_filter_table(rman_get_virtual(sc->sc_mem),
            true, false);
        if_foreach_llmaddr(sc->sc_ifnet, dtsec_hash_maddr, sc);
}

static int
dtsec_if_enable_locked(struct dtsec_softc *sc)
{
        int error;

        DTSEC_LOCK_ASSERT(sc);

        error = FM_MAC_Enable(sc->sc_mach, e_COMM_MODE_RX_AND_TX);
        if (error != E_OK)
                return (EIO);

        error = FM_PORT_Enable(sc->sc_rxph);
        if (error != E_OK)
                return (EIO);

        error = FM_PORT_Enable(sc->sc_txph);
        if (error != E_OK)
                return (EIO);

        dtsec_setup_multicast(sc);

        if_setdrvflagbits(sc->sc_ifnet, IFF_DRV_RUNNING, 0);

        /* Refresh link state */
        dtsec_miibus_statchg(sc->sc_dev);

        return (0);
}

static int
dtsec_if_disable_locked(struct dtsec_softc *sc)
{
        int error;

        DTSEC_LOCK_ASSERT(sc);

        error = FM_MAC_Disable(sc->sc_mach, e_COMM_MODE_RX_AND_TX);
        if (error != E_OK)
                return (EIO);

        error = FM_PORT_Disable(sc->sc_rxph);
        if (error != E_OK)
                return (EIO);

        error = FM_PORT_Disable(sc->sc_txph);
        if (error != E_OK)
                return (EIO);

        if_setdrvflagbits(sc->sc_ifnet, 0, IFF_DRV_RUNNING);

        return (0);
}

static int
dtsec_if_ioctl(if_t ifp, u_long command, caddr_t data)
{
        struct dtsec_softc *sc;
        struct ifreq *ifr;
        int error;

        sc = if_getsoftc(ifp);
        ifr = (struct ifreq *)data;
        error = 0;

        /* Basic functionality to achieve media status reports */
        switch (command) {
        case SIOCSIFMTU:
                DTSEC_LOCK(sc);
                if (dtsec_set_mtu(sc, ifr->ifr_mtu))
                        if_setmtu(ifp, ifr->ifr_mtu);
                else
                        error = EINVAL;
                DTSEC_UNLOCK(sc);
                break;
        case SIOCSIFFLAGS:
                DTSEC_LOCK(sc);

                if (if_getflags(sc->sc_ifnet) & IFF_UP)
                        error = dtsec_if_enable_locked(sc);
                else
                        error = dtsec_if_disable_locked(sc);

                DTSEC_UNLOCK(sc);
                break;

        case SIOCGIFMEDIA:
        case SIOCSIFMEDIA:
                error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii->mii_media,
                    command);
                break;

        default:
                error = ether_ioctl(ifp, command, data);
        }

        return (error);
}

static void
dtsec_if_tick(void *arg)
{
        struct dtsec_softc *sc;

        sc = arg;

        /* TODO */
        DTSEC_LOCK(sc);

        mii_tick(sc->sc_mii);
        callout_reset(&sc->sc_tick_callout, hz, dtsec_if_tick, sc);

        DTSEC_UNLOCK(sc);
}

static void
dtsec_if_deinit_locked(struct dtsec_softc *sc)
{

        DTSEC_LOCK_ASSERT(sc);

        DTSEC_UNLOCK(sc);
        callout_drain(&sc->sc_tick_callout);
        DTSEC_LOCK(sc);
}

static void
dtsec_if_init_locked(struct dtsec_softc *sc)
{
        int error;

        DTSEC_LOCK_ASSERT(sc);

        /* Set MAC address */
        error = FM_MAC_ModifyMacAddr(sc->sc_mach,
            (t_EnetAddr *)if_getlladdr(sc->sc_ifnet));
        if (error != E_OK) {
                device_printf(sc->sc_dev, "couldn't set MAC address.\n");
                goto err;
        }

        /* Start MII polling */
        if (sc->sc_mii)
                callout_reset(&sc->sc_tick_callout, hz, dtsec_if_tick, sc);

        if (if_getflags(sc->sc_ifnet) & IFF_UP) {
                error = dtsec_if_enable_locked(sc);
                if (error != 0)
                        goto err;
        } else {
                error = dtsec_if_disable_locked(sc);
                if (error != 0)
                        goto err;
        }

        return;

err:
        dtsec_if_deinit_locked(sc);
        device_printf(sc->sc_dev, "initialization error.\n");
        return;
}

static void
dtsec_if_init(void *data)
{
        struct dtsec_softc *sc;

        sc = data;

        DTSEC_LOCK(sc);
        dtsec_if_init_locked(sc);
        DTSEC_UNLOCK(sc);
}

static void
dtsec_if_start(if_t ifp)
{
        struct dtsec_softc *sc;

        sc = if_getsoftc(ifp);
        DTSEC_LOCK(sc);
        sc->sc_start_locked(sc);
        DTSEC_UNLOCK(sc);
}

static void
dtsec_if_watchdog(if_t ifp)
{
        /* TODO */
}
/** @} */


/**
 * @group IFmedia routines.
 * @{
 */
static int
dtsec_ifmedia_upd(if_t ifp)
{
        struct dtsec_softc *sc = if_getsoftc(ifp);

        DTSEC_LOCK(sc);
        mii_mediachg(sc->sc_mii);
        DTSEC_UNLOCK(sc);

        return (0);
}

static void
dtsec_ifmedia_sts(if_t ifp, struct ifmediareq *ifmr)
{
        struct dtsec_softc *sc = if_getsoftc(ifp);

        DTSEC_LOCK(sc);

        mii_pollstat(sc->sc_mii);

        ifmr->ifm_active = sc->sc_mii->mii_media_active;
        ifmr->ifm_status = sc->sc_mii->mii_media_status;

        DTSEC_UNLOCK(sc);
}
/** @} */


/**
 * @group dTSEC bus interface.
 * @{
 */
static void
dtsec_configure_mode(struct dtsec_softc *sc)
{
        char tunable[64];

        snprintf(tunable, sizeof(tunable), "%s.independent_mode",
            device_get_nameunit(sc->sc_dev));

        sc->sc_mode = DTSEC_MODE_REGULAR;
        TUNABLE_INT_FETCH(tunable, &sc->sc_mode);

        if (sc->sc_mode == DTSEC_MODE_REGULAR) {
                sc->sc_port_rx_init = dtsec_rm_fm_port_rx_init;
                sc->sc_port_tx_init = dtsec_rm_fm_port_tx_init;
                sc->sc_start_locked = dtsec_rm_if_start_locked;
        } else {
                sc->sc_port_rx_init = dtsec_im_fm_port_rx_init;
                sc->sc_port_tx_init = dtsec_im_fm_port_tx_init;
                sc->sc_start_locked = dtsec_im_if_start_locked;
        }

        device_printf(sc->sc_dev, "Configured for %s mode.\n",
            (sc->sc_mode == DTSEC_MODE_REGULAR) ? "regular" : "independent");
}

int
dtsec_attach(device_t dev)
{
        struct dtsec_softc *sc;
        device_t parent;
        int error;
        if_t ifp;

        sc = device_get_softc(dev);

        parent = device_get_parent(dev);
        sc->sc_dev = dev;
        sc->sc_mac_mdio_irq = NO_IRQ;

        /* Check if MallocSmart allocator is ready */
        if (XX_MallocSmartInit() != E_OK)
                return (ENXIO);

        /* Init locks */
        mtx_init(&sc->sc_lock, device_get_nameunit(dev),
            "DTSEC Global Lock", MTX_DEF);

        mtx_init(&sc->sc_mii_lock, device_get_nameunit(dev),
            "DTSEC MII Lock", MTX_DEF);

        /* Init callouts */
        callout_init(&sc->sc_tick_callout, CALLOUT_MPSAFE);

        /* Read configuraton */
        if ((error = fman_get_handle(parent, &sc->sc_fmh)) != 0)
                return (error);

        if ((error = fman_get_muram_handle(parent, &sc->sc_muramh)) != 0)
                return (error);

        if ((error = fman_get_bushandle(parent, &sc->sc_fm_base)) != 0)
                return (error);

        /* Configure working mode */
        dtsec_configure_mode(sc);

        /* If we are working in regular mode configure BMAN and QMAN */
        if (sc->sc_mode == DTSEC_MODE_REGULAR) {
                /* Create RX buffer pool */
                error = dtsec_rm_pool_rx_init(sc);
                if (error != 0)
                        return (EIO);

                /* Create RX frame queue range */
                error = dtsec_rm_fqr_rx_init(sc);
                if (error != 0)
                        return (EIO);

                /* Create frame info pool */
                error = dtsec_rm_fi_pool_init(sc);
                if (error != 0)
                        return (EIO);

                /* Create TX frame queue range */
                error = dtsec_rm_fqr_tx_init(sc);
                if (error != 0)
                        return (EIO);
        }

        /* Init FMan MAC module. */
        error = dtsec_fm_mac_init(sc, sc->sc_mac_addr);
        if (error != 0) {
                dtsec_detach(dev);
                return (ENXIO);
        }

        /* Init FMan TX port */
        error = sc->sc_port_tx_init(sc, device_get_unit(sc->sc_dev));
        if (error != 0) {
                dtsec_detach(dev);
                return (ENXIO);
        }

        /* Init FMan RX port */
        error = sc->sc_port_rx_init(sc, device_get_unit(sc->sc_dev));
        if (error != 0) {
                dtsec_detach(dev);
                return (ENXIO);
        }

        /* Create network interface for upper layers */
        ifp = sc->sc_ifnet = if_alloc(IFT_ETHER);
        if_setsoftc(ifp, sc);

        if_setflags(ifp, IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST);
        if_setinitfn(ifp, dtsec_if_init);
        if_setstartfn(ifp, dtsec_if_start);
        if_setioctlfn(ifp, dtsec_if_ioctl);
        if_setsendqlen(ifp, IFQ_MAXLEN);

        if (sc->sc_phy_addr >= 0)
                if_initname(ifp, device_get_name(sc->sc_dev),
                    device_get_unit(sc->sc_dev));
        else
                if_initname(ifp, "dtsec_phy", device_get_unit(sc->sc_dev));

        /* TODO */
#if 0
        if_setsendqlen(ifp, TSEC_TX_NUM_DESC - 1);
        if_setsendqready(ifp);
#endif

        if_setcapabilities(ifp, IFCAP_JUMBO_MTU | IFCAP_VLAN_MTU);
        if_setcapenable(ifp, if_getcapabilities(ifp));

        /* Attach PHY(s) */
        error = mii_attach(sc->sc_dev, &sc->sc_mii_dev, ifp, dtsec_ifmedia_upd,
            dtsec_ifmedia_sts, BMSR_DEFCAPMASK, sc->sc_phy_addr,
            MII_OFFSET_ANY, 0);
        if (error) {
                device_printf(sc->sc_dev, "attaching PHYs failed: %d\n", error);
                dtsec_detach(sc->sc_dev);
                return (error);
        }
        sc->sc_mii = device_get_softc(sc->sc_mii_dev);

        /* Attach to stack */
        ether_ifattach(ifp, sc->sc_mac_addr);

        return (0);
}

int
dtsec_detach(device_t dev)
{
        struct dtsec_softc *sc;
        if_t ifp;

        sc = device_get_softc(dev);
        ifp = sc->sc_ifnet;

        if (device_is_attached(dev)) {
                ether_ifdetach(ifp);
                /* Shutdown interface */
                DTSEC_LOCK(sc);
                dtsec_if_deinit_locked(sc);
                DTSEC_UNLOCK(sc);
        }

        if (sc->sc_ifnet) {
                if_free(sc->sc_ifnet);
                sc->sc_ifnet = NULL;
        }

        if (sc->sc_mode == DTSEC_MODE_REGULAR) {
                /* Free RX/TX FQRs */
                dtsec_rm_fqr_rx_free(sc);
                dtsec_rm_fqr_tx_free(sc);

                /* Free frame info pool */
                dtsec_rm_fi_pool_free(sc);

                /* Free RX buffer pool */
                dtsec_rm_pool_rx_free(sc);
        }

        dtsec_fm_mac_free(sc);
        dtsec_fm_port_free_both(sc);

        /* Destroy lock */
        mtx_destroy(&sc->sc_lock);

        return (0);
}

int
dtsec_suspend(device_t dev)
{

        return (0);
}

int
dtsec_resume(device_t dev)
{

        return (0);
}

int
dtsec_shutdown(device_t dev)
{

        return (0);
}
/** @} */


/**
 * @group MII bus interface.
 * @{
 */
int
dtsec_miibus_readreg(device_t dev, int phy, int reg)
{
        struct dtsec_softc *sc;

        sc = device_get_softc(dev);

        return (MIIBUS_READREG(sc->sc_mdio, phy, reg));
}

int
dtsec_miibus_writereg(device_t dev, int phy, int reg, int value)
{

        struct dtsec_softc *sc;

        sc = device_get_softc(dev);

        return (MIIBUS_WRITEREG(sc->sc_mdio, phy, reg, value));
}

void
dtsec_miibus_statchg(device_t dev)
{
        struct dtsec_softc *sc;
        e_EnetSpeed speed;
        bool duplex;
        int error;

        sc = device_get_softc(dev);

        DTSEC_LOCK_ASSERT(sc);

        duplex = ((sc->sc_mii->mii_media_active & IFM_GMASK) == IFM_FDX);

        switch (IFM_SUBTYPE(sc->sc_mii->mii_media_active)) {
        case IFM_1000_T:
        case IFM_1000_SX:
                speed = e_ENET_SPEED_1000;
                break;

        case IFM_100_TX:
                speed = e_ENET_SPEED_100;
                break;

        case IFM_10_T:
                speed = e_ENET_SPEED_10;
                break;

        default:
                speed = e_ENET_SPEED_10;
        }

        error = FM_MAC_AdjustLink(sc->sc_mach, speed, duplex);
        if (error != E_OK)
                device_printf(sc->sc_dev, "error while adjusting MAC speed.\n");
}
/** @} */