/*      $OpenBSD: if_axe.c,v 1.144 2024/09/04 07:54:52 mglocker Exp $   */

/*
 * Copyright (c) 2005, 2006, 2007 Jonathan Gray <jsg@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * Copyright (c) 1997, 1998, 1999, 2000-2003
 *      Bill Paul <wpaul@windriver.com>.  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.
 */

/*
 * ASIX Electronics AX88172 USB 2.0 ethernet driver. Used in the
 * LinkSys USB200M and various other adapters.
 *
 * Manuals available from:
 * http://www.asix.com.tw/datasheet/mac/Ax88172.PDF
 * Note: you need the manual for the AX88170 chip (USB 1.x ethernet
 * controller) to find the definitions for the RX control register.
 * http://www.asix.com.tw/datasheet/mac/Ax88170.PDF
 *
 * Written by Bill Paul <wpaul@windriver.com>
 * Senior Engineer
 * Wind River Systems
 */

/*
 * The AX88172 provides USB ethernet supports at 10 and 100Mbps.
 * It uses an external PHY (reference designs use a Realtek chip),
 * and has a 64-bit multicast hash filter. There is some information
 * missing from the manual which one needs to know in order to make
 * the chip function:
 *
 * - You must set bit 7 in the RX control register, otherwise the
 *   chip won't receive any packets.
 * - You must initialize all 3 IPG registers, or you won't be able
 *   to send any packets.
 *
 * Note that this device appears to only support loading the station
 * address via autoload from the EEPROM (i.e. there's no way to manually
 * set it).
 *
 * (Adam Weinberger wanted me to name this driver if_gir.c.)
 */

/*
 * Ported to OpenBSD 3/28/2004 by Greg Taleck <taleck@oz.net>
 * with bits and pieces from the aue and url drivers.
 */

#include "bpfilter.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/rwlock.h>
#include <sys/mbuf.h>

#include <sys/device.h>

#include <machine/bus.h>

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

#if NBPFILTER > 0
#include <net/bpf.h>
#endif

#include <netinet/in.h>
#include <netinet/if_ether.h>

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

#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdivar.h>
#include <dev/usb/usbdevs.h>

#include <dev/usb/if_axereg.h>

#ifdef AXE_DEBUG
#define DPRINTF(x)      do { if (axedebug) printf x; } while (0)
#define DPRINTFN(n,x)   do { if (axedebug >= (n)) printf x; } while (0)
int     axedebug = 0;
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif

/*
 * Various supported device vendors/products.
 */
const struct axe_type axe_devs[] = {
        { { USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_UF200}, 0 },
        { { USB_VENDOR_ACERCM, USB_PRODUCT_ACERCM_EP1427X2}, 0 },
        { { USB_VENDOR_APPLE, USB_PRODUCT_APPLE_ETHERNET }, AX772 },
        { { USB_VENDOR_ASIX, USB_PRODUCT_ASIX_AX88172}, 0 },
        { { USB_VENDOR_ASIX, USB_PRODUCT_ASIX_AX88772}, AX772 },
        { { USB_VENDOR_ASIX, USB_PRODUCT_ASIX_AX88772A}, AX772 },
        { { USB_VENDOR_ASIX, USB_PRODUCT_ASIX_AX88772B}, AX772 | AX772B },
        { { USB_VENDOR_ASIX, USB_PRODUCT_ASIX_AX88772B_1}, AX772 | AX772B },
        { { USB_VENDOR_ASIX, USB_PRODUCT_ASIX_AX88178}, AX178 },
        { { USB_VENDOR_ATEN, USB_PRODUCT_ATEN_UC210T}, 0 },
        { { USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5D5055 }, AX178 },
        { { USB_VENDOR_BILLIONTON, USB_PRODUCT_BILLIONTON_USB2AR}, 0},
        { { USB_VENDOR_CISCOLINKSYS, USB_PRODUCT_CISCOLINKSYS_USB200MV2}, AX772 },
        { { USB_VENDOR_COREGA, USB_PRODUCT_COREGA_FETHER_USB2_TX }, 0},
        { { USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DUBE100}, 0 },
        { { USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DUBE100B1 }, AX772 },
        { { USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DUBE100C1 }, AX772 | AX772B },
        { { USB_VENDOR_GOODWAY, USB_PRODUCT_GOODWAY_GWUSB2E}, 0 },
        { { USB_VENDOR_IODATA, USB_PRODUCT_IODATA_ETGUS2 }, AX178 },
        { { USB_VENDOR_JVC, USB_PRODUCT_JVC_MP_PRX1}, 0 },
        { { USB_VENDOR_LENOVO, USB_PRODUCT_LENOVO_ETHERNET }, AX772 | AX772B },
        { { USB_VENDOR_LINKSYS, USB_PRODUCT_LINKSYS_HG20F9}, AX772 | AX772B },
        { { USB_VENDOR_LINKSYS2, USB_PRODUCT_LINKSYS2_USB200M}, 0 },
        { { USB_VENDOR_LINKSYS4, USB_PRODUCT_LINKSYS4_USB1000 }, AX178 },
        { { USB_VENDOR_LOGITEC, USB_PRODUCT_LOGITEC_LAN_GTJU2}, AX178 },
        { { USB_VENDOR_MELCO, USB_PRODUCT_MELCO_LUAU2GT}, AX178 },
        { { USB_VENDOR_MELCO, USB_PRODUCT_MELCO_LUAU2KTX}, 0 },
        { { USB_VENDOR_MSI, USB_PRODUCT_MSI_AX88772A}, AX772 },
        { { USB_VENDOR_NETGEAR, USB_PRODUCT_NETGEAR_FA120}, 0 },
        { { USB_VENDOR_OQO, USB_PRODUCT_OQO_ETHER01PLUS }, AX772 },
        { { USB_VENDOR_PLANEX3, USB_PRODUCT_PLANEX3_GU1000T }, AX178 },
        { { USB_VENDOR_SYSTEMTALKS, USB_PRODUCT_SYSTEMTALKS_SGCX2UL}, 0 },
        { { USB_VENDOR_SITECOM, USB_PRODUCT_SITECOM_LN029}, 0 },
        { { USB_VENDOR_SITECOMEU, USB_PRODUCT_SITECOMEU_LN028 }, AX178 }
};

#define axe_lookup(v, p) ((struct axe_type *)usb_lookup(axe_devs, v, p))

int axe_match(struct device *, void *, void *);
void axe_attach(struct device *, struct device *, void *);
int axe_detach(struct device *, int);

struct cfdriver axe_cd = {
        NULL, "axe", DV_IFNET
};

const struct cfattach axe_ca = {
        sizeof(struct axe_softc), axe_match, axe_attach, axe_detach
};

int axe_tx_list_init(struct axe_softc *);
int axe_rx_list_init(struct axe_softc *);
struct mbuf *axe_newbuf(void);
int axe_encap(struct axe_softc *, struct mbuf *, int);
void axe_rxeof(struct usbd_xfer *, void *, usbd_status);
void axe_txeof(struct usbd_xfer *, void *, usbd_status);
void axe_tick(void *);
void axe_tick_task(void *);
void axe_start(struct ifnet *);
int axe_ioctl(struct ifnet *, u_long, caddr_t);
void axe_init(void *);
void axe_stop(struct axe_softc *);
void axe_watchdog(struct ifnet *);
int axe_miibus_readreg(struct device *, int, int);
void axe_miibus_writereg(struct device *, int, int, int);
void axe_miibus_statchg(struct device *);
int axe_cmd(struct axe_softc *, int, int, int, void *);
int axe_ifmedia_upd(struct ifnet *);
void axe_ifmedia_sts(struct ifnet *, struct ifmediareq *);
void axe_reset(struct axe_softc *sc);

void axe_iff(struct axe_softc *);
void axe_lock_mii(struct axe_softc *sc);
void axe_unlock_mii(struct axe_softc *sc);

void axe_ax88178_init(struct axe_softc *);
void axe_ax88772_init(struct axe_softc *);

/* Get exclusive access to the MII registers */
void
axe_lock_mii(struct axe_softc *sc)
{
        sc->axe_refcnt++;
        rw_enter_write(&sc->axe_mii_lock);
}

void
axe_unlock_mii(struct axe_softc *sc)
{
        rw_exit_write(&sc->axe_mii_lock);
        if (--sc->axe_refcnt < 0)
                usb_detach_wakeup(&sc->axe_dev);
}

int
axe_cmd(struct axe_softc *sc, int cmd, int index, int val, void *buf)
{
        usb_device_request_t    req;
        usbd_status             err;

        if (usbd_is_dying(sc->axe_udev))
                return(0);

        if (AXE_CMD_DIR(cmd))
                req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        else
                req.bmRequestType = UT_READ_VENDOR_DEVICE;
        req.bRequest = AXE_CMD_CMD(cmd);
        USETW(req.wValue, val);
        USETW(req.wIndex, index);
        USETW(req.wLength, AXE_CMD_LEN(cmd));

        err = usbd_do_request(sc->axe_udev, &req, buf);

        if (err) {
                DPRINTF(("axe_cmd err: cmd: %d\n", cmd));
                return(-1);
        }

        return(0);
}

int
axe_miibus_readreg(struct device *dev, int phy, int reg)
{
        struct axe_softc        *sc = (void *)dev;
        usbd_status             err;
        uWord                   val;
        int                     ival;

        if (usbd_is_dying(sc->axe_udev)) {
                DPRINTF(("axe: dying\n"));
                return(0);
        }

#ifdef notdef
        /*
         * The chip tells us the MII address of any supported
         * PHYs attached to the chip, so only read from those.
         */

        DPRINTF(("axe_miibus_readreg: phy 0x%x reg 0x%x\n", phy, reg));

        if (sc->axe_phyaddrs[0] != AXE_NOPHY && phy != sc->axe_phyaddrs[0])
                return (0);

        if (sc->axe_phyaddrs[1] != AXE_NOPHY && phy != sc->axe_phyaddrs[1])
                return (0);
#endif
        if (sc->axe_phyno != phy)
                return (0);

        USETW(val, 0);

        axe_lock_mii(sc);
        axe_cmd(sc, AXE_CMD_MII_OPMODE_SW, 0, 0, NULL);
        err = axe_cmd(sc, AXE_CMD_MII_READ_REG, reg, phy, val);
        axe_cmd(sc, AXE_CMD_MII_OPMODE_HW, 0, 0, NULL);
        axe_unlock_mii(sc);

        if (err) {
                printf("axe%d: read PHY failed\n", sc->axe_unit);
                return(-1);
        }
        DPRINTF(("axe_miibus_readreg: phy 0x%x reg 0x%x val 0x%x\n",
            phy, reg, UGETW(val)));

        ival = UGETW(val);
        if ((sc->axe_flags & AX772) != 0 && reg == MII_BMSR) {
                /*
                * BMSR of AX88772 indicates that it supports extended
                * capability but the extended status register is
                * reserved for embedded ethernet PHY. So clear the
                * extended capability bit of BMSR.
                */
                ival &= ~BMSR_EXTCAP;
        }

        return (ival);
}

void
axe_miibus_writereg(struct device *dev, int phy, int reg, int val)
{
        struct axe_softc        *sc = (void *)dev;
        usbd_status             err;
        uWord                   uval;

        if (usbd_is_dying(sc->axe_udev))
                return;
        if (sc->axe_phyno != phy)
                return;

        USETW(uval, val);

        axe_lock_mii(sc);
        axe_cmd(sc, AXE_CMD_MII_OPMODE_SW, 0, 0, NULL);
        err = axe_cmd(sc, AXE_CMD_MII_WRITE_REG, reg, phy, uval);
        axe_cmd(sc, AXE_CMD_MII_OPMODE_HW, 0, 0, NULL);
        axe_unlock_mii(sc);

        if (err) {
                printf("axe%d: write PHY failed\n", sc->axe_unit);
                return;
        }
}

void
axe_miibus_statchg(struct device *dev)
{
        struct axe_softc        *sc = (void *)dev;
        struct mii_data         *mii = GET_MII(sc);
        struct ifnet            *ifp;
        int                     val, err;

        ifp = GET_IFP(sc);
        if (mii == NULL || ifp == NULL ||
            (ifp->if_flags & IFF_RUNNING) == 0)
                return;

        sc->axe_link = 0;
        if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) ==
            (IFM_ACTIVE | IFM_AVALID)) {
                switch (IFM_SUBTYPE(mii->mii_media_active)) {
                    case IFM_10_T:
                    case IFM_100_TX:
                        sc->axe_link++;
                        break;
                    case IFM_1000_T:
                        if ((sc->axe_flags & AX178) == 0)
                            break;
                        sc->axe_link++;
                        break;
                    default:
                        break;
                }
        }

        /* Lost link, do nothing. */
        if (sc->axe_link == 0)
                return;

        val = 0;
        if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0)
                val |= AXE_MEDIA_FULL_DUPLEX;

        if (sc->axe_flags & AX178 || sc->axe_flags & AX772) {
                val |= (AXE_178_MEDIA_RX_EN | AXE_178_MEDIA_MAGIC);
                if (sc->axe_flags & AX178)
                        val |= AXE_178_MEDIA_ENCK;

                switch (IFM_SUBTYPE(mii->mii_media_active)) {
                case IFM_1000_T:
                        val |= AXE_178_MEDIA_GMII | AXE_178_MEDIA_ENCK;
                        break;
                case IFM_100_TX:
                        val |= AXE_178_MEDIA_100TX;
                        break;
                case IFM_10_T:
                        /* doesn't need to be handled */
                        break;
                }
        }

        DPRINTF(("axe_miibus_statchg: val=0x%x\n", val));
        err = axe_cmd(sc, AXE_CMD_WRITE_MEDIA, 0, val, NULL);
        if (err) {
                printf("%s: media change failed\n", sc->axe_dev.dv_xname);
                return;
        }
}

/*
 * Set media options.
 */
int
axe_ifmedia_upd(struct ifnet *ifp)
{
        struct axe_softc        *sc = ifp->if_softc;
        struct mii_data         *mii = GET_MII(sc);

        if (mii->mii_instance) {
                struct mii_softc        *miisc;
                LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
                        mii_phy_reset(miisc);
        }
        mii_mediachg(mii);

        return (0);
}

/*
 * Report current media status.
 */
void
axe_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
{
        struct axe_softc        *sc = ifp->if_softc;
        struct mii_data         *mii = GET_MII(sc);

        mii_pollstat(mii);
        ifmr->ifm_active = mii->mii_media_active;
        ifmr->ifm_status = mii->mii_media_status;
}

void
axe_iff(struct axe_softc *sc)
{
        struct ifnet            *ifp = GET_IFP(sc);
        struct arpcom           *ac = &sc->arpcom;
        struct ether_multi *enm;
        struct ether_multistep step;
        u_int32_t               h = 0;
        uWord                   urxmode;
        u_int16_t               rxmode;
        u_int8_t                hashtbl[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };

        if (usbd_is_dying(sc->axe_udev))
                return;

        axe_cmd(sc, AXE_CMD_RXCTL_READ, 0, 0, urxmode);
        rxmode = UGETW(urxmode);
        rxmode &= ~(AXE_RXCMD_ALLMULTI | AXE_RXCMD_MULTICAST |
            AXE_RXCMD_PROMISC);
        ifp->if_flags &= ~IFF_ALLMULTI;

        /*
         * Always accept broadcast frames.
         * Always accept frames destined to our station address.
         */
        rxmode |= AXE_RXCMD_BROADCAST;
        if ((sc->axe_flags & (AX178 | AX772)) == 0)
                rxmode |= AXE_172_RXCMD_UNICAST;

        if (ifp->if_flags & IFF_PROMISC || ac->ac_multirangecnt > 0) {
                ifp->if_flags |= IFF_ALLMULTI;
                rxmode |= AXE_RXCMD_ALLMULTI;
                if (ifp->if_flags & IFF_PROMISC)
                        rxmode |= AXE_RXCMD_PROMISC;
        } else {
                rxmode |= AXE_RXCMD_MULTICAST;

                /* now program new ones */
                ETHER_FIRST_MULTI(step, ac, enm);
                while (enm != NULL) {
                        h = ether_crc32_be(enm->enm_addrlo,
                            ETHER_ADDR_LEN) >> 26;

                        hashtbl[h / 8] |= 1 << (h % 8);

                        ETHER_NEXT_MULTI(step, enm);
                }
        }

        axe_cmd(sc, AXE_CMD_WRITE_MCAST, 0, 0, (void *)&hashtbl);
        axe_cmd(sc, AXE_CMD_RXCTL_WRITE, 0, rxmode, NULL);
}

void
axe_reset(struct axe_softc *sc)
{
        if (usbd_is_dying(sc->axe_udev))
                return;
        /* XXX What to reset? */

        /* Wait a little while for the chip to get its brains in order. */
        DELAY(1000);
        return;
}

#define AXE_GPIO_WRITE(x,y) do {                                \
        axe_cmd(sc, AXE_CMD_WRITE_GPIO, 0, (x), NULL);          \
        usbd_delay_ms(sc->axe_udev, (y));                       \
} while (0)

void
axe_ax88178_init(struct axe_softc *sc)
{
        int gpio0 = 0, phymode = 0, ledmode;
        u_int16_t eeprom, val;

        axe_cmd(sc, AXE_CMD_SROM_WR_ENABLE, 0, 0, NULL);
        /* XXX magic */
        axe_cmd(sc, AXE_CMD_SROM_READ, 0, 0x0017, &eeprom);
        axe_cmd(sc, AXE_CMD_SROM_WR_DISABLE, 0, 0, NULL);

        eeprom = letoh16(eeprom);

        DPRINTF((" EEPROM is 0x%x\n", eeprom));

        /* if EEPROM is invalid we have to use to GPIO0 */
        if (eeprom == 0xffff) {
                phymode = AXE_PHY_MODE_MARVELL;
                gpio0 = 1;
                ledmode = 0;
        } else {
                phymode = eeprom & 0x7f;
                gpio0 = (eeprom & 0x80) ? 0 : 1;
                ledmode = eeprom >> 8;
        }

        DPRINTF(("use gpio0: %d, phymode 0x%02x, eeprom 0x%04x\n",
            gpio0, phymode, eeprom));

        /* power up external phy */
        AXE_GPIO_WRITE(AXE_GPIO1|AXE_GPIO1_EN | AXE_GPIO_RELOAD_EEPROM, 40);
        if (ledmode == 1) {
                AXE_GPIO_WRITE(AXE_GPIO1_EN, 30);
                AXE_GPIO_WRITE(AXE_GPIO1_EN | AXE_GPIO1, 30);
        } else {
                val = gpio0 == 1 ? AXE_GPIO0 | AXE_GPIO0_EN : 
                    AXE_GPIO1 | AXE_GPIO1_EN;
                AXE_GPIO_WRITE(val | AXE_GPIO2 | AXE_GPIO2_EN, 30);
                AXE_GPIO_WRITE(val | AXE_GPIO2_EN, 300);
                AXE_GPIO_WRITE(val | AXE_GPIO2 | AXE_GPIO2_EN, 30);
        }

        /* initialize phy */
        if (phymode == AXE_PHY_MODE_REALTEK_8211CL) {
                axe_miibus_writereg(&sc->axe_dev, sc->axe_phyno, 0x1f, 0x0005);
                axe_miibus_writereg(&sc->axe_dev, sc->axe_phyno, 0x0c, 0x0000);
                val = axe_miibus_readreg(&sc->axe_dev, sc->axe_phyno, 0x0001);
                axe_miibus_writereg(&sc->axe_dev, sc->axe_phyno, 0x01,
                    val | 0x0080);
                axe_miibus_writereg(&sc->axe_dev, sc->axe_phyno, 0x1f, 0x0000);
        }

        /* soft reset */
        axe_cmd(sc, AXE_CMD_SW_RESET_REG, 0, AXE_SW_RESET_CLEAR, NULL);
        usbd_delay_ms(sc->axe_udev, 150);
        axe_cmd(sc, AXE_CMD_SW_RESET_REG, 0,
            AXE_SW_RESET_PRL | AXE_178_RESET_MAGIC, NULL);
        usbd_delay_ms(sc->axe_udev, 150);
        /* Enable MII/GMII/RGMII for external PHY */
        axe_cmd(sc, AXE_CMD_SW_PHY_SELECT, 0, 0, NULL);
        usbd_delay_ms(sc->axe_udev, 10);
        axe_cmd(sc, AXE_CMD_RXCTL_WRITE, 0, 0, NULL);
}

/* Read Ethernet Address from EEPROM if it is zero */
void
axe_ax88772b_nodeid(struct axe_softc *sc, u_char *eaddr)
{
        int i;
        uint16_t val;

        for (i = 0; i < ETHER_ADDR_LEN; i++) {
                if (eaddr[i] != 0)
                        break;
        }

        /* We already have an ethernet address */
        if (i != ETHER_ADDR_LEN)
                return;

        /* read from EEPROM */
        for (i = 0; i < ETHER_ADDR_LEN/2; i++) {
                axe_cmd(sc, AXE_CMD_SROM_READ, 0, AXE_EEPROM_772B_NODEID + i, &val);
                val = ntohs(val);
                *eaddr++ = (u_char)((val >> 8) & 0xff);
                *eaddr++ = (u_char)(val & 0xff);
        }
}

void
axe_ax88772_init(struct axe_softc *sc)
{
        axe_cmd(sc, AXE_CMD_WRITE_GPIO, 0, 0x00b0, NULL);
        usbd_delay_ms(sc->axe_udev, 40);

        if (sc->axe_phyno == AXE_PHY_NO_AX772_EPHY) {
                /* ask for the embedded PHY */
                axe_cmd(sc, AXE_CMD_SW_PHY_SELECT, 0, 0x01, NULL);
                usbd_delay_ms(sc->axe_udev, 10);

                /* power down and reset state, pin reset state */
                axe_cmd(sc, AXE_CMD_SW_RESET_REG, 0, AXE_SW_RESET_CLEAR, NULL);
                usbd_delay_ms(sc->axe_udev, 60);

                /* power down/reset state, pin operating state */
                axe_cmd(sc, AXE_CMD_SW_RESET_REG, 0,
                    AXE_SW_RESET_IPPD | AXE_SW_RESET_PRL, NULL);
                usbd_delay_ms(sc->axe_udev, 150);

                /* power up, reset */
                axe_cmd(sc, AXE_CMD_SW_RESET_REG, 0, AXE_SW_RESET_PRL, NULL);

                /* power up, operating */
                axe_cmd(sc, AXE_CMD_SW_RESET_REG, 0,
                    AXE_SW_RESET_IPRL | AXE_SW_RESET_PRL, NULL);
        } else {
                /* ask for external PHY */
                axe_cmd(sc, AXE_CMD_SW_PHY_SELECT, 0, 0x00, NULL);
                usbd_delay_ms(sc->axe_udev, 10);

                /* power down internal PHY */
                axe_cmd(sc, AXE_CMD_SW_RESET_REG, 0,
                    AXE_SW_RESET_IPPD | AXE_SW_RESET_PRL, NULL);
        }

        usbd_delay_ms(sc->axe_udev, 150);
        axe_cmd(sc, AXE_CMD_RXCTL_WRITE, 0, 0, NULL);
}

static int
axe_get_phyno(struct axe_softc *sc, int sel)
{
        int phyno = -1;

        switch (AXE_PHY_TYPE(sc->axe_phyaddrs[sel])) {
        case PHY_TYPE_100_HOME:
        case PHY_TYPE_GIG:
                phyno  = AXE_PHY_NO(sc->axe_phyaddrs[sel]);
                break;
        case PHY_TYPE_SPECIAL:
                /* FALLTHROUGH */
        case PHY_TYPE_RSVD:
                /* FALLTHROUGH */
        case PHY_TYPE_NON_SUP:
                /* FALLTHROUGH */
        default:
                break;
        }

        return (phyno);
}

/*
 * Probe for a AX88172 chip.
 */
int
axe_match(struct device *parent, void *match, void *aux)
{
        struct usb_attach_arg *uaa = aux;

        if (uaa->iface == NULL || uaa->configno != 1)
                return (UMATCH_NONE);

        return (axe_lookup(uaa->vendor, uaa->product) != NULL ?
                UMATCH_VENDOR_PRODUCT_CONF_IFACE : UMATCH_NONE);
}

/*
 * Attach the interface. Allocate softc structures, do ifmedia
 * setup and ethernet/BPF attach.
 */
void
axe_attach(struct device *parent, struct device *self, void *aux)
{
        struct axe_softc *sc = (struct axe_softc *)self;
        struct usb_attach_arg *uaa = aux;
        usb_interface_descriptor_t *id;
        usb_endpoint_descriptor_t *ed;
        struct mii_data *mii;
        u_char eaddr[ETHER_ADDR_LEN];
        char *devname = sc->axe_dev.dv_xname;
        struct ifnet *ifp;
        int i, s;

        sc->axe_unit = self->dv_unit; /*device_get_unit(self);*/
        sc->axe_udev = uaa->device;
        sc->axe_iface = uaa->iface;
        sc->axe_flags = axe_lookup(uaa->vendor, uaa->product)->axe_flags;

        usb_init_task(&sc->axe_tick_task, axe_tick_task, sc,
            USB_TASK_TYPE_GENERIC);
        rw_init(&sc->axe_mii_lock, "axemii");
        usb_init_task(&sc->axe_stop_task, (void (*)(void *))axe_stop, sc,
            USB_TASK_TYPE_GENERIC);

        sc->axe_product = uaa->product;
        sc->axe_vendor = uaa->vendor;

        id = usbd_get_interface_descriptor(sc->axe_iface);

        /* decide on what our bufsize will be */
        if (sc->axe_flags & (AX178 | AX772))
                sc->axe_bufsz = (sc->axe_udev->speed == USB_SPEED_HIGH) ?
                    AXE_178_MAX_BUFSZ : AXE_178_MIN_BUFSZ;
        else
                sc->axe_bufsz = AXE_172_BUFSZ;

        /* Find endpoints. */
        for (i = 0; i < id->bNumEndpoints; i++) {
                ed = usbd_interface2endpoint_descriptor(sc->axe_iface, i);
                if (!ed) {
                        printf("%s: couldn't get ep %d\n",
                            sc->axe_dev.dv_xname, i);
                        return;
                }
                if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
                    UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
                        sc->axe_ed[AXE_ENDPT_RX] = ed->bEndpointAddress;
                } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
                           UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
                        sc->axe_ed[AXE_ENDPT_TX] = ed->bEndpointAddress;
                } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
                           UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
                        sc->axe_ed[AXE_ENDPT_INTR] = ed->bEndpointAddress;
                }
        }

        s = splnet();

        /* We need the PHYID for init dance in some cases */
        axe_cmd(sc, AXE_CMD_READ_PHYID, 0, 0, (void *)&sc->axe_phyaddrs);

        DPRINTF((" phyaddrs[0]: %x phyaddrs[1]: %x\n",
            sc->axe_phyaddrs[0], sc->axe_phyaddrs[1]));

        sc->axe_phyno = axe_get_phyno(sc, AXE_PHY_SEL_PRI);
        if (sc->axe_phyno == -1)
                sc->axe_phyno = axe_get_phyno(sc, AXE_PHY_SEL_SEC);
        if (sc->axe_phyno == -1) {
                printf("%s:", sc->axe_dev.dv_xname);
                printf(" no valid PHY address found, assuming PHY address 0\n");
                sc->axe_phyno = 0;
        }

        DPRINTF((" get_phyno %d\n", sc->axe_phyno));

        if (sc->axe_flags & AX178)
                axe_ax88178_init(sc);
        else if (sc->axe_flags & AX772)
                axe_ax88772_init(sc);

        /*
         * Get station address.
         */
        if (sc->axe_flags & (AX178 | AX772))
                axe_cmd(sc, AXE_178_CMD_READ_NODEID, 0, 0, &eaddr);
        else
                axe_cmd(sc, AXE_172_CMD_READ_NODEID, 0, 0, &eaddr);

        if (sc->axe_flags & AX772B)
                axe_ax88772b_nodeid(sc, eaddr);

        /*
         * Load IPG values
         */
        axe_cmd(sc, AXE_CMD_READ_IPG012, 0, 0, (void *)&sc->axe_ipgs);

        /*
         * An ASIX chip was detected. Inform the world.
         */
        printf("%s:", sc->axe_dev.dv_xname);
        if (sc->axe_flags & AX178)
                printf(" AX88178");
        else if (sc->axe_flags & AX772B)
                printf(" AX88772B");
        else if (sc->axe_flags & AX772)
                printf(" AX88772");
        else
                printf(" AX88172");
        printf(", address %s\n", ether_sprintf(eaddr));

        bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);

        /* Initialize interface info.*/
        ifp = &sc->arpcom.ac_if;
        ifp->if_softc = sc;
        strlcpy(ifp->if_xname, devname, IFNAMSIZ);
        ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
        ifp->if_ioctl = axe_ioctl;
        ifp->if_start = axe_start;
        ifp->if_watchdog = axe_watchdog;

        ifp->if_capabilities = IFCAP_VLAN_MTU;

        /* Initialize MII/media info. */
        mii = &sc->axe_mii;
        mii->mii_ifp = ifp;
        mii->mii_readreg = axe_miibus_readreg;
        mii->mii_writereg = axe_miibus_writereg;
        mii->mii_statchg = axe_miibus_statchg;
        mii->mii_flags = MIIF_AUTOTSLEEP;

        ifmedia_init(&mii->mii_media, 0, axe_ifmedia_upd, axe_ifmedia_sts);
        mii_attach(self, 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);

        /* Attach the interface. */
        if_attach(ifp);
        ether_ifattach(ifp);

        timeout_set(&sc->axe_stat_ch, axe_tick, sc);

        splx(s);
}

int
axe_detach(struct device *self, int flags)
{
        struct axe_softc        *sc = (struct axe_softc *)self;
        int                     s;
        struct ifnet            *ifp = GET_IFP(sc);

        DPRINTFN(2,("%s: %s: enter\n", sc->axe_dev.dv_xname, __func__));

        if (timeout_initialized(&sc->axe_stat_ch))
                timeout_del(&sc->axe_stat_ch);

        if (sc->axe_ep[AXE_ENDPT_TX] != NULL)
                usbd_abort_pipe(sc->axe_ep[AXE_ENDPT_TX]);
        if (sc->axe_ep[AXE_ENDPT_RX] != NULL)
                usbd_abort_pipe(sc->axe_ep[AXE_ENDPT_RX]);
        if (sc->axe_ep[AXE_ENDPT_INTR] != NULL)
                usbd_abort_pipe(sc->axe_ep[AXE_ENDPT_INTR]);

        /*
         * Remove any pending tasks.  They cannot be executing because they run
         * in the same thread as detach.
         */
        usb_rem_task(sc->axe_udev, &sc->axe_tick_task);
        usb_rem_task(sc->axe_udev, &sc->axe_stop_task);

        s = splusb();

        if (--sc->axe_refcnt >= 0) {
                /* Wait for processes to go away */
                usb_detach_wait(&sc->axe_dev);
        }

        if (ifp->if_flags & IFF_RUNNING)
                axe_stop(sc);

        mii_detach(&sc->axe_mii, MII_PHY_ANY, MII_OFFSET_ANY);
        ifmedia_delete_instance(&sc->axe_mii.mii_media, IFM_INST_ANY);
        if (ifp->if_softc != NULL) {
                ether_ifdetach(ifp);
                if_detach(ifp);
        }

#ifdef DIAGNOSTIC
        if (sc->axe_ep[AXE_ENDPT_TX] != NULL ||
            sc->axe_ep[AXE_ENDPT_RX] != NULL ||
            sc->axe_ep[AXE_ENDPT_INTR] != NULL)
                printf("%s: detach has active endpoints\n",
                    sc->axe_dev.dv_xname);
#endif

        splx(s);

        return (0);
}

struct mbuf *
axe_newbuf(void)
{
        struct mbuf             *m;

        MGETHDR(m, M_DONTWAIT, MT_DATA);
        if (m == NULL)
                return (NULL);

        MCLGET(m, M_DONTWAIT);
        if (!(m->m_flags & M_EXT)) {
                m_freem(m);
                return (NULL);
        }

        m->m_len = m->m_pkthdr.len = MCLBYTES;
        m_adj(m, ETHER_ALIGN);

        return (m);
}

int
axe_rx_list_init(struct axe_softc *sc)
{
        struct axe_cdata *cd;
        struct axe_chain *c;
        int i;

        DPRINTF(("%s: %s: enter\n", sc->axe_dev.dv_xname, __func__));

        cd = &sc->axe_cdata;
        for (i = 0; i < AXE_RX_LIST_CNT; i++) {
                c = &cd->axe_rx_chain[i];
                c->axe_sc = sc;
                c->axe_idx = i;
                c->axe_mbuf = NULL;
                if (c->axe_xfer == NULL) {
                        c->axe_xfer = usbd_alloc_xfer(sc->axe_udev);
                        if (c->axe_xfer == NULL)
                                return (ENOBUFS);
                        c->axe_buf = usbd_alloc_buffer(c->axe_xfer,
                            sc->axe_bufsz);
                        if (c->axe_buf == NULL) {
                                usbd_free_xfer(c->axe_xfer);
                                return (ENOBUFS);
                        }
                }
        }

        return (0);
}

int
axe_tx_list_init(struct axe_softc *sc)
{
        struct axe_cdata *cd;
        struct axe_chain *c;
        int i;

        DPRINTF(("%s: %s: enter\n", sc->axe_dev.dv_xname, __func__));

        cd = &sc->axe_cdata;
        for (i = 0; i < AXE_TX_LIST_CNT; i++) {
                c = &cd->axe_tx_chain[i];
                c->axe_sc = sc;
                c->axe_idx = i;
                c->axe_mbuf = NULL;
                if (c->axe_xfer == NULL) {
                        c->axe_xfer = usbd_alloc_xfer(sc->axe_udev);
                        if (c->axe_xfer == NULL)
                                return (ENOBUFS);
                        c->axe_buf = usbd_alloc_buffer(c->axe_xfer,
                            sc->axe_bufsz);
                        if (c->axe_buf == NULL) {
                                usbd_free_xfer(c->axe_xfer);
                                return (ENOBUFS);
                        }
                }
        }

        return (0);
}

/*
 * A frame has been uploaded: pass the resulting mbuf chain up to
 * the higher level protocols.
 */
void
axe_rxeof(struct usbd_xfer *xfer, void *priv, usbd_status status)
{
        struct axe_chain        *c = (struct axe_chain *)priv;
        struct axe_softc        *sc = c->axe_sc;
        struct ifnet            *ifp = GET_IFP(sc);
        struct mbuf_list        ml = MBUF_LIST_INITIALIZER();
        u_char                  *buf = c->axe_buf;
        u_int32_t               total_len;
        u_int16_t               pktlen = 0;
        struct mbuf             *m;
        struct axe_sframe_hdr   hdr;
        int                     s;

        DPRINTFN(10,("%s: %s: enter\n", sc->axe_dev.dv_xname,__func__));

        if (usbd_is_dying(sc->axe_udev))
                return;

        if (!(ifp->if_flags & IFF_RUNNING))
                return;

        if (status != USBD_NORMAL_COMPLETION) {
                if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
                        return;
                if (usbd_ratecheck(&sc->axe_rx_notice)) {
                        printf("%s: usb errors on rx: %s\n",
                            sc->axe_dev.dv_xname, usbd_errstr(status));
                }
                if (status == USBD_STALLED)
                        usbd_clear_endpoint_stall_async(sc->axe_ep[AXE_ENDPT_RX]);
                goto done;
        }

        usbd_get_xfer_status(xfer, NULL, NULL, &total_len, NULL);

        do {
                if (sc->axe_flags & (AX178 | AX772)) {
                        if (total_len < sizeof(hdr)) {
                                ifp->if_ierrors++;
                                goto done;
                        }

                        buf += pktlen;

                        memcpy(&hdr, buf, sizeof(hdr));
                        total_len -= sizeof(hdr);

                        if (((letoh16(hdr.len) & AXE_RH1M_RXLEN_MASK) ^
                            (letoh16(hdr.ilen) & AXE_RH1M_RXLEN_MASK)) !=
                            AXE_RH1M_RXLEN_MASK) {
                                ifp->if_ierrors++;
                                goto done;
                        }
                        pktlen = letoh16(hdr.len) & AXE_RH1M_RXLEN_MASK;
                        if (pktlen > total_len) {
                                ifp->if_ierrors++;
                                goto done;
                        }

                        buf += sizeof(hdr);

                        if ((pktlen % 2) != 0)
                                pktlen++;

                        if (total_len < pktlen)
                                total_len = 0;
                        else
                                total_len -= pktlen;
                } else {
                        pktlen = total_len; /* crc on the end? */
                        total_len = 0;
                }

                m = axe_newbuf();
                if (m == NULL) {
                        ifp->if_ierrors++;
                        goto done;
                }

                m->m_pkthdr.len = m->m_len = pktlen;

                memcpy(mtod(m, char *), buf, pktlen);

                ml_enqueue(&ml, m);

        } while (total_len > 0);

done:
        /* push the packet up */
        s = splnet();
        if_input(ifp, &ml);
        splx(s);

        memset(c->axe_buf, 0, sc->axe_bufsz);

        /* Setup new transfer. */
        usbd_setup_xfer(xfer, sc->axe_ep[AXE_ENDPT_RX],
            c, c->axe_buf, sc->axe_bufsz,
            USBD_SHORT_XFER_OK | USBD_NO_COPY,
            USBD_NO_TIMEOUT, axe_rxeof);
        usbd_transfer(xfer);

        DPRINTFN(10,("%s: %s: start rx\n", sc->axe_dev.dv_xname, __func__));

        return;
}

/*
 * A frame was downloaded to the chip. It's safe for us to clean up
 * the list buffers.
 */

void
axe_txeof(struct usbd_xfer *xfer, void *priv, usbd_status status)
{
        struct axe_softc        *sc;
        struct axe_chain        *c;
        struct ifnet            *ifp;
        int                     s;

        c = priv;
        sc = c->axe_sc;
        ifp = &sc->arpcom.ac_if;

        if (usbd_is_dying(sc->axe_udev))
                return;

        s = splnet();

        if (status != USBD_NORMAL_COMPLETION) {
                if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) {
                        splx(s);
                        return;
                }
                ifp->if_oerrors++;
                printf("axe%d: usb error on tx: %s\n", sc->axe_unit,
                    usbd_errstr(status));
                if (status == USBD_STALLED)
                        usbd_clear_endpoint_stall_async(sc->axe_ep[AXE_ENDPT_TX]);
                splx(s);
                return;
        }

        ifp->if_timer = 0;
        ifq_clr_oactive(&ifp->if_snd);

        m_freem(c->axe_mbuf);
        c->axe_mbuf = NULL;

        if (ifq_empty(&ifp->if_snd) == 0)
                axe_start(ifp);

        splx(s);
        return;
}

void
axe_tick(void *xsc)
{
        struct axe_softc *sc = xsc;

        if (sc == NULL)
                return;

        DPRINTFN(0xff, ("%s: %s: enter\n", sc->axe_dev.dv_xname,
                        __func__));

        if (usbd_is_dying(sc->axe_udev))
                return;

        /* Perform periodic stuff in process context */
        usb_add_task(sc->axe_udev, &sc->axe_tick_task);

}

void
axe_tick_task(void *xsc)
{
        int                     s;
        struct axe_softc        *sc;
        struct ifnet            *ifp;
        struct mii_data         *mii;

        sc = xsc;

        if (sc == NULL)
                return;

        if (usbd_is_dying(sc->axe_udev))
                return;

        ifp = GET_IFP(sc);
        mii = GET_MII(sc);
        if (mii == NULL)
                return;

        s = splnet();

        mii_tick(mii);
        if (sc->axe_link == 0)
                axe_miibus_statchg(&sc->axe_dev);
        timeout_add_sec(&sc->axe_stat_ch, 1);

        splx(s);
}

int
axe_encap(struct axe_softc *sc, struct mbuf *m, int idx)
{
        struct axe_chain        *c;
        usbd_status             err;
        struct axe_sframe_hdr   hdr;
        int                     length, boundary;

        c = &sc->axe_cdata.axe_tx_chain[idx];

        if (sc->axe_flags & (AX178 | AX772)) {
                boundary = (sc->axe_udev->speed == USB_SPEED_HIGH) ? 512 : 64;

                hdr.len = htole16(m->m_pkthdr.len);
                hdr.ilen = ~hdr.len;

                memcpy(c->axe_buf, &hdr, sizeof(hdr));
                length = sizeof(hdr);

                m_copydata(m, 0, m->m_pkthdr.len, c->axe_buf + length);
                length += m->m_pkthdr.len;

                if ((length % boundary) == 0) {
                        hdr.len = 0x0000;
                        hdr.ilen = 0xffff;
                        memcpy(c->axe_buf + length, &hdr, sizeof(hdr));
                        length += sizeof(hdr);
                }

        } else {
                m_copydata(m, 0, m->m_pkthdr.len, c->axe_buf);
                length = m->m_pkthdr.len;
        }

        c->axe_mbuf = m;

        usbd_setup_xfer(c->axe_xfer, sc->axe_ep[AXE_ENDPT_TX],
            c, c->axe_buf, length, USBD_FORCE_SHORT_XFER | USBD_NO_COPY,
            10000, axe_txeof);

        /* Transmit */
        err = usbd_transfer(c->axe_xfer);
        if (err != USBD_IN_PROGRESS) {
                c->axe_mbuf = NULL;
                axe_stop(sc);
                return(EIO);
        }

        sc->axe_cdata.axe_tx_cnt++;

        return(0);
}

void
axe_start(struct ifnet *ifp)
{
        struct axe_softc        *sc;
        struct mbuf             *m_head = NULL;

        sc = ifp->if_softc;

        if (!sc->axe_link)
                return;

        if (ifq_is_oactive(&ifp->if_snd))
                return;

        m_head = ifq_dequeue(&ifp->if_snd);
        if (m_head == NULL)
                return;

        if (axe_encap(sc, m_head, 0)) {
                m_freem(m_head);
                ifq_set_oactive(&ifp->if_snd);
                return;
        }

        /*
         * If there's a BPF listener, bounce a copy of this frame
         * to him.
         */
#if NBPFILTER > 0
        if (ifp->if_bpf)
                bpf_mtap(ifp->if_bpf, m_head, BPF_DIRECTION_OUT);
#endif

        ifq_set_oactive(&ifp->if_snd);

        /*
         * Set a timeout in case the chip goes out to lunch.
         */
        ifp->if_timer = 5;

        return;
}

void
axe_init(void *xsc)
{
        struct axe_softc        *sc = xsc;
        struct ifnet            *ifp = &sc->arpcom.ac_if;
        struct axe_chain        *c;
        usbd_status             err;
        uWord                   urxmode;
        int                     rxmode;
        int                     i, s;

        s = splnet();

        /*
         * Cancel pending I/O and free all RX/TX buffers.
         */
        axe_reset(sc);

        /* set MAC address */
        if (sc->axe_flags & (AX178 | AX772))
                axe_cmd(sc, AXE_178_CMD_WRITE_NODEID, 0, 0,
                    &sc->arpcom.ac_enaddr);

        /* Enable RX logic. */

        /* Init RX ring. */
        if (axe_rx_list_init(sc) == ENOBUFS) {
                printf("axe%d: rx list init failed\n", sc->axe_unit);
                splx(s);
                return;
        }

        /* Init TX ring. */
        if (axe_tx_list_init(sc) == ENOBUFS) {
                printf("axe%d: tx list init failed\n", sc->axe_unit);
                splx(s);
                return;
        }

        /* Set transmitter IPG values */
        if (sc->axe_flags & (AX178 | AX772))
                axe_cmd(sc, AXE_178_CMD_WRITE_IPG012, sc->axe_ipgs[2],
                    (sc->axe_ipgs[1] << 8) | (sc->axe_ipgs[0]), NULL);
        else {
                axe_cmd(sc, AXE_172_CMD_WRITE_IPG0, 0, sc->axe_ipgs[0], NULL);
                axe_cmd(sc, AXE_172_CMD_WRITE_IPG1, 0, sc->axe_ipgs[1], NULL);
                axe_cmd(sc, AXE_172_CMD_WRITE_IPG2, 0, sc->axe_ipgs[2], NULL);
        }

        /* Program promiscuous mode and multicast filters. */
        axe_iff(sc);

        /* Enable receiver, set RX mode */
        axe_cmd(sc, AXE_CMD_RXCTL_READ, 0, 0, urxmode);
        rxmode = UGETW(urxmode);
        rxmode |= AXE_RXCMD_ENABLE;
        if (sc->axe_flags & AX772B)
                rxmode |= AXE_772B_RXCMD_RH1M;
        else if (sc->axe_flags & (AX178 | AX772)) {
                if (sc->axe_udev->speed == USB_SPEED_HIGH) {
                        /* largest possible USB buffer size for AX88178 */
                        rxmode |= AXE_178_RXCMD_MFB;
                }
        }
        axe_cmd(sc, AXE_CMD_RXCTL_WRITE, 0, rxmode, NULL);

        /* Open RX and TX pipes. */
        err = usbd_open_pipe(sc->axe_iface, sc->axe_ed[AXE_ENDPT_RX],
            USBD_EXCLUSIVE_USE, &sc->axe_ep[AXE_ENDPT_RX]);
        if (err) {
                printf("axe%d: open rx pipe failed: %s\n",
                    sc->axe_unit, usbd_errstr(err));
                splx(s);
                return;
        }

        err = usbd_open_pipe(sc->axe_iface, sc->axe_ed[AXE_ENDPT_TX],
            USBD_EXCLUSIVE_USE, &sc->axe_ep[AXE_ENDPT_TX]);
        if (err) {
                printf("axe%d: open tx pipe failed: %s\n",
                    sc->axe_unit, usbd_errstr(err));
                splx(s);
                return;
        }

        /* Start up the receive pipe. */
        for (i = 0; i < AXE_RX_LIST_CNT; i++) {
                c = &sc->axe_cdata.axe_rx_chain[i];
                usbd_setup_xfer(c->axe_xfer, sc->axe_ep[AXE_ENDPT_RX],
                    c, c->axe_buf, sc->axe_bufsz,
                    USBD_SHORT_XFER_OK | USBD_NO_COPY,
                    USBD_NO_TIMEOUT, axe_rxeof);
                usbd_transfer(c->axe_xfer);
        }

        sc->axe_link = 0;
        ifp->if_flags |= IFF_RUNNING;
        ifq_clr_oactive(&ifp->if_snd);

        splx(s);

        timeout_add_sec(&sc->axe_stat_ch, 1);
        return;
}

int
axe_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
        struct axe_softc        *sc = ifp->if_softc;
        struct ifreq            *ifr = (struct ifreq *)data;
        int                     s, error = 0;

        s = splnet();

        switch(cmd) {
        case SIOCSIFADDR:
                ifp->if_flags |= IFF_UP;
                if (!(ifp->if_flags & IFF_RUNNING))
                        axe_init(sc);
                break;

        case SIOCSIFFLAGS:
                if (ifp->if_flags & IFF_UP) {
                        if (ifp->if_flags & IFF_RUNNING)
                                error = ENETRESET;
                        else
                                axe_init(sc);
                } else {
                        if (ifp->if_flags & IFF_RUNNING)
                                axe_stop(sc);
                }
                break;

        case SIOCGIFMEDIA:
        case SIOCSIFMEDIA:
                error = ifmedia_ioctl(ifp, ifr, &sc->axe_mii.mii_media, cmd);
                break;

        default:
                error = ether_ioctl(ifp, &sc->arpcom, cmd, data);
        }

        if (error == ENETRESET) {
                if (ifp->if_flags & IFF_RUNNING)
                        axe_iff(sc);
                error = 0;
        }

        splx(s);
        return(error);
}

void
axe_watchdog(struct ifnet *ifp)
{
        struct axe_softc        *sc;
        struct axe_chain        *c;
        usbd_status             stat;
        int                     s;

        sc = ifp->if_softc;

        ifp->if_oerrors++;
        printf("axe%d: watchdog timeout\n", sc->axe_unit);

        s = splusb();
        c = &sc->axe_cdata.axe_tx_chain[0];
        usbd_get_xfer_status(c->axe_xfer, NULL, NULL, NULL, &stat);
        axe_txeof(c->axe_xfer, c, stat);

        if (!ifq_empty(&ifp->if_snd))
                axe_start(ifp);
        splx(s);
}

/*
 * Stop the adapter and free any mbufs allocated to the
 * RX and TX lists.
 */
void
axe_stop(struct axe_softc *sc)
{
        usbd_status             err;
        struct ifnet            *ifp;
        int                     i;

        axe_reset(sc);

        ifp = &sc->arpcom.ac_if;
        ifp->if_timer = 0;
        ifp->if_flags &= ~IFF_RUNNING;
        ifq_clr_oactive(&ifp->if_snd);

        timeout_del(&sc->axe_stat_ch);

        /* Stop transfers. */
        if (sc->axe_ep[AXE_ENDPT_RX] != NULL) {
                err = usbd_close_pipe(sc->axe_ep[AXE_ENDPT_RX]);
                if (err) {
                        printf("axe%d: close rx pipe failed: %s\n",
                            sc->axe_unit, usbd_errstr(err));
                }
                sc->axe_ep[AXE_ENDPT_RX] = NULL;
        }

        if (sc->axe_ep[AXE_ENDPT_TX] != NULL) {
                err = usbd_close_pipe(sc->axe_ep[AXE_ENDPT_TX]);
                if (err) {
                        printf("axe%d: close tx pipe failed: %s\n",
                            sc->axe_unit, usbd_errstr(err));
                }
                sc->axe_ep[AXE_ENDPT_TX] = NULL;
        }

        if (sc->axe_ep[AXE_ENDPT_INTR] != NULL) {
                err = usbd_close_pipe(sc->axe_ep[AXE_ENDPT_INTR]);
                if (err) {
                        printf("axe%d: close intr pipe failed: %s\n",
                            sc->axe_unit, usbd_errstr(err));
                }
                sc->axe_ep[AXE_ENDPT_INTR] = NULL;
        }

        /* Free RX resources. */
        for (i = 0; i < AXE_RX_LIST_CNT; i++) {
                if (sc->axe_cdata.axe_rx_chain[i].axe_mbuf != NULL) {
                        m_freem(sc->axe_cdata.axe_rx_chain[i].axe_mbuf);
                        sc->axe_cdata.axe_rx_chain[i].axe_mbuf = NULL;
                }
                if (sc->axe_cdata.axe_rx_chain[i].axe_xfer != NULL) {
                        usbd_free_xfer(sc->axe_cdata.axe_rx_chain[i].axe_xfer);
                        sc->axe_cdata.axe_rx_chain[i].axe_xfer = NULL;
                }
        }

        /* Free TX resources. */
        for (i = 0; i < AXE_TX_LIST_CNT; i++) {
                if (sc->axe_cdata.axe_tx_chain[i].axe_mbuf != NULL) {
                        m_freem(sc->axe_cdata.axe_tx_chain[i].axe_mbuf);
                        sc->axe_cdata.axe_tx_chain[i].axe_mbuf = NULL;
                }
                if (sc->axe_cdata.axe_tx_chain[i].axe_xfer != NULL) {
                        usbd_free_xfer(sc->axe_cdata.axe_tx_chain[i].axe_xfer);
                        sc->axe_cdata.axe_tx_chain[i].axe_xfer = NULL;
                }
        }

        sc->axe_link = 0;
}