/*      $NetBSD: if_kue.c,v 1.119 2022/08/20 14:08:59 riastradh Exp $   */

/*
 * Copyright (c) 1997, 1998, 1999, 2000
 *      Bill Paul <wpaul@ee.columbia.edu>.  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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
 * 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.
 *
 * $FreeBSD: src/sys/dev/usb/if_kue.c,v 1.14 2000/01/14 01:36:15 wpaul Exp $
 */

/*
 * Kawasaki LSI KL5KUSB101B USB to ethernet adapter driver.
 *
 * Written by Bill Paul <wpaul@ee.columbia.edu>
 * Electrical Engineering Department
 * Columbia University, New York City
 */

/*
 * The KLSI USB to ethernet adapter chip contains an USB serial interface,
 * ethernet MAC and embedded microcontroller (called the QT Engine).
 * The chip must have firmware loaded into it before it will operate.
 * Packets are passed between the chip and host via bulk transfers.
 * There is an interrupt endpoint mentioned in the software spec, however
 * it's currently unused. This device is 10Mbps half-duplex only, hence
 * there is no media selection logic. The MAC supports a 128 entry
 * multicast filter, though the exact size of the filter can depend
 * on the firmware. Curiously, while the software spec describes various
 * ethernet statistics counters, my sample adapter and firmware combination
 * claims not to support any statistics counters at all.
 *
 * Note that once we load the firmware in the device, we have to be
 * careful not to load it again: if you restart your computer but
 * leave the adapter attached to the USB controller, it may remain
 * powered on and retain its firmware. In this case, we don't need
 * to load the firmware a second time.
 *
 * Special thanks to Rob Furr for providing an ADS Technologies
 * adapter for development and testing. No monkeys were harmed during
 * the development of this driver.
 */

/*
 * Ported to NetBSD and somewhat rewritten by Lennart Augustsson.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_kue.c,v 1.119 2022/08/20 14:08:59 riastradh Exp $");

#ifdef _KERNEL_OPT
#include "opt_inet.h"
#include "opt_usb.h"
#endif

#include <sys/param.h>
#include <sys/kmem.h>

#include <dev/usb/usbnet.h>

#ifdef INET
#include <netinet/in.h>
#include <netinet/if_inarp.h>
#endif

#include <dev/usb/if_kuereg.h>
#include <dev/usb/kue_fw.h>

#ifdef KUE_DEBUG
#define DPRINTF(x)      if (kuedebug) printf x
#define DPRINTFN(n, x)  if (kuedebug >= (n)) printf x
int     kuedebug = 0;
#else
#define DPRINTF(x)
#define DPRINTFN(n, x)
#endif

struct kue_type {
        uint16_t                kue_vid;
        uint16_t                kue_did;
};

struct kue_softc {
        struct usbnet           kue_un;

        struct kue_ether_desc   kue_desc;
        uint16_t                kue_rxfilt;
        uint8_t                 *kue_mcfilters;
};

#define KUE_MCFILT(x, y)        \
        (uint8_t *)&(sc->kue_mcfilters[y * ETHER_ADDR_LEN])

#define KUE_BUFSZ               1536
#define KUE_MIN_FRAMELEN        60

#define KUE_RX_LIST_CNT         1
#define KUE_TX_LIST_CNT         1

/*
 * Various supported device vendors/products.
 */
static const struct usb_devno kue_devs[] = {
        { USB_VENDOR_3COM, USB_PRODUCT_3COM_3C19250 },
        { USB_VENDOR_3COM, USB_PRODUCT_3COM_3C460 },
        { USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_URE450 },
        { USB_VENDOR_ADS, USB_PRODUCT_ADS_UBS10BT },
        { USB_VENDOR_ADS, USB_PRODUCT_ADS_UBS10BTX },
        { USB_VENDOR_ACTIONTEC, USB_PRODUCT_ACTIONTEC_AR9287 },
        { USB_VENDOR_ALLIEDTELESYN, USB_PRODUCT_ALLIEDTELESYN_AT_USB10 },
        { USB_VENDOR_AOX, USB_PRODUCT_AOX_USB101 },
        { USB_VENDOR_ASANTE, USB_PRODUCT_ASANTE_EA },
        { USB_VENDOR_ATEN, USB_PRODUCT_ATEN_UC10T },
        { USB_VENDOR_ATEN, USB_PRODUCT_ATEN_DSB650C },
        { USB_VENDOR_COREGA, USB_PRODUCT_COREGA_ETHER_USB_T },
        { USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DSB650C },
        { USB_VENDOR_ENTREGA, USB_PRODUCT_ENTREGA_E45 },
        { USB_VENDOR_ENTREGA, USB_PRODUCT_ENTREGA_XX1 },
        { USB_VENDOR_ENTREGA, USB_PRODUCT_ENTREGA_XX2 },
        { USB_VENDOR_IODATA, USB_PRODUCT_IODATA_USBETT },
        { USB_VENDOR_JATON, USB_PRODUCT_JATON_EDA },
        { USB_VENDOR_KINGSTON, USB_PRODUCT_KINGSTON_XX1 },
        { USB_VENDOR_KLSI, USB_PRODUCT_KLSI_DUH3E10BT },
        { USB_VENDOR_KLSI, USB_PRODUCT_KLSI_DUH3E10BTN },
        { USB_VENDOR_LINKSYS, USB_PRODUCT_LINKSYS_USB10T },
        { USB_VENDOR_MOBILITY, USB_PRODUCT_MOBILITY_EA },
        { USB_VENDOR_NETGEAR, USB_PRODUCT_NETGEAR_EA101 },
        { USB_VENDOR_NETGEAR, USB_PRODUCT_NETGEAR_EA101X },
        { USB_VENDOR_PERACOM, USB_PRODUCT_PERACOM_ENET },
        { USB_VENDOR_PERACOM, USB_PRODUCT_PERACOM_ENET2 },
        { USB_VENDOR_PERACOM, USB_PRODUCT_PERACOM_ENET3 },
        { USB_VENDOR_PORTGEAR, USB_PRODUCT_PORTGEAR_EA8 },
        { USB_VENDOR_PORTGEAR, USB_PRODUCT_PORTGEAR_EA9 },
        { USB_VENDOR_PORTSMITH, USB_PRODUCT_PORTSMITH_EEA },
        { USB_VENDOR_SHARK, USB_PRODUCT_SHARK_PA },
        { USB_VENDOR_SILICOM, USB_PRODUCT_SILICOM_U2E },
        { USB_VENDOR_SILICOM, USB_PRODUCT_SILICOM_GPE },
        { USB_VENDOR_SMC, USB_PRODUCT_SMC_2102USB },
};
#define kue_lookup(v, p) (usb_lookup(kue_devs, v, p))

static int kue_match(device_t, cfdata_t, void *);
static void kue_attach(device_t, device_t, void *);
static int kue_detach(device_t, int);

CFATTACH_DECL_NEW(kue, sizeof(struct kue_softc), kue_match, kue_attach,
    kue_detach, usbnet_activate);

static void kue_uno_rx_loop(struct usbnet *, struct usbnet_chain *, uint32_t);
static unsigned kue_uno_tx_prepare(struct usbnet *, struct mbuf *,
                                   struct usbnet_chain *);
static void kue_uno_mcast(struct ifnet *);
static int kue_uno_init(struct ifnet *);

static const struct usbnet_ops kue_ops = {
        .uno_mcast = kue_uno_mcast,
        .uno_tx_prepare = kue_uno_tx_prepare,
        .uno_rx_loop = kue_uno_rx_loop,
        .uno_init = kue_uno_init,
};

static void kue_reset(struct usbnet *);

static usbd_status kue_ctl(struct usbnet *, int, uint8_t,
                           uint16_t, void *, uint32_t);
static int kue_load_fw(struct usbnet *);

static usbd_status
kue_setword(struct usbnet *un, uint8_t breq, uint16_t word)
{
        usb_device_request_t    req;

        DPRINTFN(10,("%s: %s: enter\n", device_xname(un->un_dev),__func__));

        req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        req.bRequest = breq;
        USETW(req.wValue, word);
        USETW(req.wIndex, 0);
        USETW(req.wLength, 0);

        return usbd_do_request(un->un_udev, &req, NULL);
}

static usbd_status
kue_ctl(struct usbnet *un, int rw, uint8_t breq, uint16_t val,
        void *data, uint32_t len)
{
        usb_device_request_t    req;

        DPRINTFN(10,("%s: %s: enter, len=%d\n", device_xname(un->un_dev),
                     __func__, len));

        if (rw == KUE_CTL_WRITE)
                req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        else
                req.bmRequestType = UT_READ_VENDOR_DEVICE;

        req.bRequest = breq;
        USETW(req.wValue, val);
        USETW(req.wIndex, 0);
        USETW(req.wLength, len);

        return usbd_do_request(un->un_udev, &req, data);
}

static int
kue_load_fw(struct usbnet *un)
{
        usb_device_descriptor_t dd;
        usbd_status             err;

        DPRINTFN(1,("%s: %s: enter\n", device_xname(un->un_dev), __func__));

        /*
         * First, check if we even need to load the firmware.
         * If the device was still attached when the system was
         * rebooted, it may already have firmware loaded in it.
         * If this is the case, we don't need to do it again.
         * And in fact, if we try to load it again, we'll hang,
         * so we have to avoid this condition if we don't want
         * to look stupid.
         *
         * We can test this quickly by checking the bcdRevision
         * code. The NIC will return a different revision code if
         * it's probed while the firmware is still loaded and
         * running.
         */
        if (usbd_get_device_desc(un->un_udev, &dd))
                return EIO;
        if (UGETW(dd.bcdDevice) == KUE_WARM_REV) {
                printf("%s: warm boot, no firmware download\n",
                       device_xname(un->un_dev));
                return 0;
        }

        printf("%s: cold boot, downloading firmware\n",
               device_xname(un->un_dev));

        /* Load code segment */
        DPRINTFN(1,("%s: kue_load_fw: download code_seg\n",
                    device_xname(un->un_dev)));
        /*XXXUNCONST*/
        err = kue_ctl(un, KUE_CTL_WRITE, KUE_CMD_SEND_SCAN,
            0, __UNCONST(kue_code_seg), sizeof(kue_code_seg));
        if (err) {
                printf("%s: failed to load code segment: %s\n",
                    device_xname(un->un_dev), usbd_errstr(err));
                        return EIO;
        }

        /* Load fixup segment */
        DPRINTFN(1,("%s: kue_load_fw: download fix_seg\n",
                    device_xname(un->un_dev)));
        /*XXXUNCONST*/
        err = kue_ctl(un, KUE_CTL_WRITE, KUE_CMD_SEND_SCAN,
            0, __UNCONST(kue_fix_seg), sizeof(kue_fix_seg));
        if (err) {
                printf("%s: failed to load fixup segment: %s\n",
                    device_xname(un->un_dev), usbd_errstr(err));
                        return EIO;
        }

        /* Send trigger command. */
        DPRINTFN(1,("%s: kue_load_fw: download trig_seg\n",
                    device_xname(un->un_dev)));
        /*XXXUNCONST*/
        err = kue_ctl(un, KUE_CTL_WRITE, KUE_CMD_SEND_SCAN,
            0, __UNCONST(kue_trig_seg), sizeof(kue_trig_seg));
        if (err) {
                printf("%s: failed to load trigger segment: %s\n",
                    device_xname(un->un_dev), usbd_errstr(err));
                        return EIO;
        }

        usbd_delay_ms(un->un_udev, 10);

        /*
         * Reload device descriptor.
         * Why? The chip without the firmware loaded returns
         * one revision code. The chip with the firmware
         * loaded and running returns a *different* revision
         * code. This confuses the quirk mechanism, which is
         * dependent on the revision data.
         */
        (void)usbd_reload_device_desc(un->un_udev);

        DPRINTFN(1,("%s: %s: done\n", device_xname(un->un_dev), __func__));

        /* Reset the adapter. */
        kue_reset(un);

        return 0;
}

static void
kue_uno_mcast(struct ifnet *ifp)
{
        struct usbnet *         un = ifp->if_softc;
        struct ethercom *       ec = usbnet_ec(un);
        struct kue_softc *      sc = usbnet_softc(un);
        struct ether_multi      *enm;
        struct ether_multistep  step;
        int                     i;

        DPRINTFN(5,("%s: %s: enter\n", device_xname(un->un_dev), __func__));

         /* If we want promiscuous mode, set the allframes bit. */
        if (usbnet_ispromisc(un))
                sc->kue_rxfilt |= KUE_RXFILT_PROMISC;
        else
                sc->kue_rxfilt &= ~KUE_RXFILT_PROMISC;

        if (usbnet_ispromisc(un)) {
                ETHER_LOCK(ec);
allmulti:
                ec->ec_flags |= ETHER_F_ALLMULTI;
                ETHER_UNLOCK(ec);
                sc->kue_rxfilt |= KUE_RXFILT_ALLMULTI|KUE_RXFILT_PROMISC;
                sc->kue_rxfilt &= ~KUE_RXFILT_MULTICAST;
                kue_setword(un, KUE_CMD_SET_PKT_FILTER, sc->kue_rxfilt);
                return;
        }

        sc->kue_rxfilt &= ~(KUE_RXFILT_ALLMULTI|KUE_RXFILT_PROMISC);

        i = 0;
        ETHER_LOCK(ec);
        ETHER_FIRST_MULTI(step, ec, enm);
        while (enm != NULL) {
                if (i == KUE_MCFILTCNT(sc) ||
                    memcmp(enm->enm_addrlo, enm->enm_addrhi,
                    ETHER_ADDR_LEN) != 0) {
                        goto allmulti;
                }

                memcpy(KUE_MCFILT(sc, i), enm->enm_addrlo, ETHER_ADDR_LEN);
                ETHER_NEXT_MULTI(step, enm);
                i++;
        }
        ec->ec_flags &= ~ETHER_F_ALLMULTI;
        ETHER_UNLOCK(ec);

        sc->kue_rxfilt |= KUE_RXFILT_MULTICAST;
        kue_ctl(un, KUE_CTL_WRITE, KUE_CMD_SET_MCAST_FILTERS,
            i, sc->kue_mcfilters, i * ETHER_ADDR_LEN);

        kue_setword(un, KUE_CMD_SET_PKT_FILTER, sc->kue_rxfilt);
}

/*
 * Issue a SET_CONFIGURATION command to reset the MAC. This should be
 * done after the firmware is loaded into the adapter in order to
 * bring it into proper operation.
 */
static void
kue_reset(struct usbnet *un)
{
        DPRINTFN(5,("%s: %s: enter\n", device_xname(un->un_dev), __func__));

        if (usbd_set_config_no(un->un_udev, KUE_CONFIG_NO, 1) ||
            usbd_device2interface_handle(un->un_udev, KUE_IFACE_IDX,
                                         &un->un_iface))
                printf("%s: reset failed\n", device_xname(un->un_dev));

        /* Wait a little while for the chip to get its brains in order. */
        usbd_delay_ms(un->un_udev, 10);
}

/*
 * Probe for a KLSI chip.
 */
static int
kue_match(device_t parent, cfdata_t match, void *aux)
{
        struct usb_attach_arg *uaa = aux;

        DPRINTFN(25,("kue_match: enter\n"));

        return kue_lookup(uaa->uaa_vendor, uaa->uaa_product) != NULL ?
                UMATCH_VENDOR_PRODUCT : UMATCH_NONE;
}

/*
 * Attach the interface. Allocate softc structures, do
 * setup and ethernet/BPF attach.
 */
static void
kue_attach(device_t parent, device_t self, void *aux)
{
        struct kue_softc *sc = device_private(self);
        struct usbnet * const un = &sc->kue_un;
        struct usb_attach_arg *uaa = aux;
        char                    *devinfop;
        struct usbd_device *    dev = uaa->uaa_device;
        usbd_status             err;
        usb_interface_descriptor_t      *id;
        usb_endpoint_descriptor_t       *ed;
        int                     i;

        KASSERT((void *)sc == un);

        DPRINTFN(5,(" : kue_attach: sc=%p, dev=%p", sc, dev));

        aprint_naive("\n");
        aprint_normal("\n");
        devinfop = usbd_devinfo_alloc(dev, 0);
        aprint_normal_dev(self, "%s\n", devinfop);
        usbd_devinfo_free(devinfop);

        un->un_dev = self;
        un->un_udev = dev;
        un->un_sc = sc;
        un->un_ops = &kue_ops;
        un->un_rx_xfer_flags = USBD_SHORT_XFER_OK;
        un->un_tx_xfer_flags = 0;
        un->un_rx_list_cnt = KUE_RX_LIST_CNT;
        un->un_tx_list_cnt = KUE_TX_LIST_CNT;
        un->un_rx_bufsz = KUE_BUFSZ;
        un->un_tx_bufsz = KUE_BUFSZ;

        err = usbd_set_config_no(dev, KUE_CONFIG_NO, 1);
        if (err) {
                aprint_error_dev(self, "failed to set configuration"
                    ", err=%s\n", usbd_errstr(err));
                return;
        }

        /* Load the firmware into the NIC. */
        if (kue_load_fw(un)) {
                aprint_error_dev(self, "loading firmware failed\n");
                return;
        }

        err = usbd_device2interface_handle(dev, KUE_IFACE_IDX, &un->un_iface);
        if (err) {
                aprint_error_dev(self, "getting interface handle failed\n");
                return;
        }

        id = usbd_get_interface_descriptor(un->un_iface);

        /* Find endpoints. */
        for (i = 0; i < id->bNumEndpoints; i++) {
                ed = usbd_interface2endpoint_descriptor(un->un_iface, i);
                if (ed == NULL) {
                        aprint_error_dev(self, "couldn't get ep %d\n", i);
                        return;
                }
                if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
                    UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
                        un->un_ed[USBNET_ENDPT_RX] = ed->bEndpointAddress;
                } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
                           UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
                        un->un_ed[USBNET_ENDPT_TX] = ed->bEndpointAddress;
                } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
                           UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
                        /*
                         * The interrupt endpoint is currently unused by the
                         * KLSI part.
                         */
                        un->un_ed[USBNET_ENDPT_INTR] = ed->bEndpointAddress;
                }
        }

        if (un->un_ed[USBNET_ENDPT_RX] == 0 ||
            un->un_ed[USBNET_ENDPT_TX] == 0) {
                aprint_error_dev(self, "missing endpoint\n");
                return;
        }

        /* First level attach, so kue_ctl() works. */
        usbnet_attach(un);

        /* Read ethernet descriptor */
        err = kue_ctl(un, KUE_CTL_READ, KUE_CMD_GET_ETHER_DESCRIPTOR,
            0, &sc->kue_desc, sizeof(sc->kue_desc));
        if (err) {
                aprint_error_dev(self, "could not read Ethernet descriptor\n");
                return;
        }
        memcpy(un->un_eaddr, sc->kue_desc.kue_macaddr, sizeof(un->un_eaddr));

        sc->kue_mcfilters = kmem_alloc(KUE_MCFILTCNT(sc) * ETHER_ADDR_LEN,
            KM_SLEEP);

        usbnet_attach_ifp(un, IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST,
            0, NULL);
}

static int
kue_detach(device_t self, int flags)
{
        struct kue_softc *sc = device_private(self);

        if (sc->kue_mcfilters != NULL) {
                kmem_free(sc->kue_mcfilters,
                    KUE_MCFILTCNT(sc) * ETHER_ADDR_LEN);
                sc->kue_mcfilters = NULL;
        }

        return usbnet_detach(self, flags);
}

/*
 * A frame has been uploaded: pass the resulting mbuf chain up to
 * the higher level protocols.
 */
static void
kue_uno_rx_loop(struct usbnet *un, struct usbnet_chain *c, uint32_t total_len)
{
        struct ifnet            *ifp = usbnet_ifp(un);
        uint8_t                 *buf = c->unc_buf;
        unsigned                pktlen;

        if (total_len <= 1)
                return;

        DPRINTFN(10,("%s: %s: total_len=%d len=%d\n",
                     device_xname(un->un_dev), __func__,
                     total_len, le16dec(buf)));

        pktlen = le16dec(buf);
        if (pktlen > total_len - ETHER_ALIGN)
                pktlen = total_len - ETHER_ALIGN;

        if (pktlen < ETHER_MIN_LEN - ETHER_CRC_LEN ||
            pktlen > MCLBYTES - ETHER_ALIGN) {
                if_statinc(ifp, if_ierrors);
                return;
        }

        DPRINTFN(10,("%s: %s: deliver %d\n", device_xname(un->un_dev),
                    __func__, pktlen));
        usbnet_enqueue(un, buf + 2, pktlen, 0, 0, 0);
}

static unsigned
kue_uno_tx_prepare(struct usbnet *un, struct mbuf *m, struct usbnet_chain *c)
{
        unsigned                total_len, pkt_len;

        pkt_len = m->m_pkthdr.len + 2;
        total_len = roundup2(pkt_len, 64);

        if ((unsigned)total_len > un->un_tx_bufsz) {
                DPRINTFN(10,("%s: %s: too big pktlen %u total %u\n",
                    device_xname(un->un_dev), __func__, pkt_len, total_len));
                return 0;
        }

        /* Frame length is specified in the first 2 bytes of the buffer. */
        le16enc(c->unc_buf, (uint16_t)m->m_pkthdr.len);

        /*
         * Copy the mbuf data into a contiguous buffer after the frame length,
         * possibly zeroing the rest of the buffer.
         */
        m_copydata(m, 0, m->m_pkthdr.len, c->unc_buf + 2);
        if (total_len - pkt_len > 0)
                memset(c->unc_buf + pkt_len, 0, total_len - pkt_len);

        DPRINTFN(10,("%s: %s: enter pktlen %u total %u\n",
            device_xname(un->un_dev), __func__, pkt_len, total_len));

        return total_len;
}

static int
kue_uno_init(struct ifnet *ifp)
{
        struct usbnet * const   un = ifp->if_softc;
        struct kue_softc        *sc = usbnet_softc(un);
        uint8_t                 eaddr[ETHER_ADDR_LEN];

        DPRINTFN(5,("%s: %s: enter\n", device_xname(un->un_dev),__func__));

        memcpy(eaddr, CLLADDR(ifp->if_sadl), sizeof(eaddr));
        /* Set MAC address */
        kue_ctl(un, KUE_CTL_WRITE, KUE_CMD_SET_MAC, 0, eaddr, ETHER_ADDR_LEN);

        sc->kue_rxfilt = KUE_RXFILT_UNICAST | KUE_RXFILT_BROADCAST;

        /* I'm not sure how to tune these. */
#if 0
        /*
         * Leave this one alone for now; setting it
         * wrong causes lockups on some machines/controllers.
         */
        kue_setword(un, KUE_CMD_SET_SOFS, 1);
#endif
        kue_setword(un, KUE_CMD_SET_URB_SIZE, 64);

        return 0;
}

#ifdef _MODULE
#include "ioconf.c"
#endif

USBNET_MODULE(kue)