/*
 * axf_usbgem.c : ASIX AX88172/772 USB to Fast Ethernet Driver for Solaris
 *
 * Copyright (c) 2004-2012 Masayuki Murayama.  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. Neither the name of the author nor the names of its contributors may be
 *    used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 * COPYRIGHT OWNER 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.
 */

/*
 *  Changelog:
 */

/*
 * TODO
 * handle RXMODE_ENABLE in set_rx_filter()
 */
/* ======================================================= */

/*
 * Solaris system header files and macros
 */

/* minimum kernel headers for drivers */
#include <sys/types.h>
#include <sys/conf.h>
#include <sys/debug.h>
#include <sys/kmem.h>
#include <sys/modctl.h>
#include <sys/errno.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/byteorder.h>

/* ethernet stuff */
#include <sys/ethernet.h>

/* interface card depend stuff */
#include <sys/stropts.h>
#include <sys/stream.h>
#include <sys/strlog.h>
#include <sys/usb/usba.h>
#include "usbgem.h"

/* hardware stuff */
#include "usbgem_mii.h"
#include "ax88172reg.h"

char    ident[] = "ax88x72 usbnic driver v" VERSION;

/*
 * Useful macros
 */
#define CHECK_AND_JUMP(err, label)      if (err != USB_SUCCESS) goto label
#define LE16P(p)        ((((uint8_t *)(p))[1] << 8) | ((uint8_t *)(p))[0])

#define AX88172(dp)     \
        (((struct axf_dev *)(dp)->private)->chip->type == CHIP_TYPE_AX88172)

#define AX88772(dp)     \
        (((struct axf_dev *)(dp)->private)->chip->type == CHIP_TYPE_AX88772)

/*
 * Debugging
 */
#ifdef DEBUG_LEVEL
static int axf_debug = DEBUG_LEVEL;
#define DPRINTF(n, args)        if (axf_debug > (n)) cmn_err args
#else
#define DPRINTF(n, args)
#endif

/*
 * Our configration for ax88172
 */
/* timeouts */
#define ONESEC          (drv_usectohz(1*1000000))

/*
 * RX/TX buffer size
 */

/*
 * Local device definitions
 */
struct chip_info {
        uint16_t        vid;    /* usb vendor id */
        uint16_t        pid;    /* usb product id */
        int             type;
        uint8_t         gpio_reset[2];
        uint8_t         gpio_speed[2];
        uint8_t         gpio_duplex[2];
        char            *name;
#define CHIP_TYPE_AX88172       0
#define CHIP_TYPE_AX88772       1
#define CHIP_TYPE_AX88178       2
};

#define GPIO_DEFAULT    {0x00, 0x15}, {0, 0}, {0, 0}
struct chip_info chiptbl_88x7x[] = {
/* AX88172 */
{
        /* Planex UE2-100TX, Hawking UF200, TrendNet TU2-ET100 */
        0x07b8, 0x420a, CHIP_TYPE_AX88172,

        /*
         * the default setting covers below:
         * gpio bit2 has to be 0 and gpio bit0 has to be 1
         */
        {0, 0},
        {GPIO_EN1, GPIO_DATA1 | GPIO_EN1},
        {0, 0},
        "Planex UE2-100TX",     /* tested */
},
{
        0x2001, 0x1a00, CHIP_TYPE_AX88172,
        {0x9f, 0x9e}, {0, 0}, {0, 0},
        "D-Link dube100",       /* XXX */
},
{
        0x077b, 0x2226, CHIP_TYPE_AX88172,
        GPIO_DEFAULT,
        "Linksys USB200M",
},
{
        0x0846, 0x1040, CHIP_TYPE_AX88172,
        GPIO_DEFAULT,
        "Netgear FA120",
},
{
        0x0b95, 0x1720, CHIP_TYPE_AX88172,
        GPIO_DEFAULT,
        "Intellinet, ST Lab USB Ethernet",
},
{
        0x08dd, 0x90ff, CHIP_TYPE_AX88172,
        GPIO_DEFAULT,
        "Billionton Systems, USB2AR",
},
{
        0x0557, 0x2009, CHIP_TYPE_AX88172,
        GPIO_DEFAULT,
        "ATEN UC210T",
},
{
        0x0411, 0x003d, CHIP_TYPE_AX88172,
        GPIO_DEFAULT,
        "Buffalo LUA-U2-KTX",
},
{
        0x6189, 0x182d, CHIP_TYPE_AX88172,
        GPIO_DEFAULT,
        "Sitecom LN-029 USB 2.0 10/100 Ethernet adapter",
},
{
        0x07aa, 0x0017, CHIP_TYPE_AX88172,
        GPIO_DEFAULT,
        "corega FEther USB2-TX",
},
{
        0x1189, 0x0893, CHIP_TYPE_AX88172,
        GPIO_DEFAULT,
        "Surecom EP-1427X-2",
},
{
        0x1631, 0x6200, CHIP_TYPE_AX88172,
        GPIO_DEFAULT,
        "goodway corp usb gwusb2e",
},
/* AX88772 and AX88178 */
{
        0x13b1, 0x0018, CHIP_TYPE_AX88772,
        {0, 0}, {0, 0}, {0, 0},
        "Linksys USB200M rev.2",
},
{
        0x1557, 0x7720, CHIP_TYPE_AX88772,
        {0, 0}, {0, 0}, {0, 0},
        "0Q0 cable ethernet",
},
{
        0x07d1, 0x3c05, CHIP_TYPE_AX88772,
        {0, 0}, {0, 0}, {0, 0},
        "DLink DUB E100 ver B1",
},
{
        0x2001, 0x3c05, CHIP_TYPE_AX88772,
        {0, 0}, {0, 0}, {0, 0},
        "DLink DUB E100 ver B1(2)",
},
{
        0x05ac, 0x1402, CHIP_TYPE_AX88772,
        {0, 0}, {0, 0}, {0, 0},
        "Apple Ethernet USB Adapter",
},
{
        0x1737, 0x0039, CHIP_TYPE_AX88178,
        {0, 0}, {0, 0}, {0, 0},
        "Linksys USB1000",
},
{
        0x0411, 0x006e, CHIP_TYPE_AX88178,
        {0, 0}, {0, 0}, {0, 0},
        "Buffalo LUA-U2-KGT/LUA-U2-GT",
},
{
        0x04bb, 0x0930, CHIP_TYPE_AX88178,
        {0, 0}, {0, 0}, {0, 0},
        "I/O DATA ETG-US2",
},
{
        0x050d, 0x5055, CHIP_TYPE_AX88178,
        {0, 0}, {0, 0}, {0, 0},
        "Belkin F5D5055",
},
{
        /* generic ax88772 must be the last entry */
        /* planex UE-200TX-G */
        0x0b95, 0x7720, CHIP_TYPE_AX88772,
        {0, 0}, {0, 0}, {0, 0},
        "ASIX AX88772/AX88178", /* tested */
},
};

#define CHIPTABLESIZE   (sizeof (chiptbl_88x7x) / sizeof (struct chip_info))

struct axf_dev {
        /*
         * Misc HW information
         */
        struct chip_info        *chip;
        uint8_t                 ipg[3];
        uint8_t                 gpio;
        uint16_t                rcr;
        uint16_t                msr;
        uint8_t                 last_link_state;
        boolean_t               phy_has_reset;
};

/*
 * private functions
 */

/* mii operations */
static uint16_t axf_mii_read(struct usbgem_dev *, uint_t, int *errp);
static void axf_mii_write(struct usbgem_dev *, uint_t, uint16_t, int *errp);

/* nic operations */
static int axf_reset_chip(struct usbgem_dev *);
static int axf_init_chip(struct usbgem_dev *);
static int axf_start_chip(struct usbgem_dev *);
static int axf_stop_chip(struct usbgem_dev *);
static int axf_set_media(struct usbgem_dev *);
static int axf_set_rx_filter(struct usbgem_dev *);
static int axf_get_stats(struct usbgem_dev *);
static void  axf_interrupt(struct usbgem_dev *, mblk_t *);

/* packet operations */
static mblk_t *axf_tx_make_packet(struct usbgem_dev *, mblk_t *);
static mblk_t *axf_rx_make_packet(struct usbgem_dev *, mblk_t *);

/* =============================================================== */
/*
 * I/O functions
 */
/* =============================================================== */
/* BEGIN CSTYLED */
#define OUT(dp, req, val, ix, len, buf, errp, label)    \
        if ((*(errp) = usbgem_ctrl_out((dp),    \
        /* bmRequestType */ USB_DEV_REQ_HOST_TO_DEV     \
                    | USB_DEV_REQ_TYPE_VENDOR | USB_DEV_REQ_RCPT_DEV,   \
        /* bRequest */ (req),   \
        /* wValue */   (val),   \
        /* wIndex */   (ix),    \
        /* wLength */  (len),   \
        /* value */    (buf),   \
        /* size */     (len))) != USB_SUCCESS) goto label

#define IN(dp, req, val, ix, len, buf, errp, label)     \
        if ((*(errp) = usbgem_ctrl_in((dp),     \
        /* bmRequestType */ USB_DEV_REQ_DEV_TO_HOST     \
                    | USB_DEV_REQ_TYPE_VENDOR | USB_DEV_REQ_RCPT_DEV,   \
        /* bRequest */ (req),   \
        /* wValue */   (val),   \
        /* wIndex */   (ix),    \
        /* wLength */  (len),   \
        /* valuep */   (buf),   \
        /* size */     (len))) != USB_SUCCESS) goto label
/* END CSTYLED */

/* =============================================================== */
/*
 * Hardware manupilation
 */
/* =============================================================== */
static int
axf_reset_phy(struct usbgem_dev *dp)
{
        uint8_t phys[2];
        uint8_t val8;
        int     err;
        struct axf_dev  *lp = dp->private;

        DPRINTF(2, (CE_CONT, "!%s: %s: called", dp->name, __func__));

        if (AX88172(dp)) {
                delay(drv_usectohz(5000));
                IN(dp, VCMD_READ_GPIO, 0, 0, 1, &val8, &err, usberr);

                DPRINTF(0, (CE_CONT, "!%s: %s: gpio 0x%b",
                    dp->name, __func__, val8, GPIO_BITS));

                /* reset MII PHY */
                val8 = lp->chip->gpio_reset[1]
                    | lp->chip->gpio_speed[dp->speed]
                    | lp->chip->gpio_duplex[dp->full_duplex];

                OUT(dp, VCMD_WRITE_GPIO,
                    val8, 0, 0, NULL, &err, usberr);
                delay(drv_usectohz(5000));

                val8 = lp->chip->gpio_reset[0]
                    | lp->chip->gpio_speed[dp->speed]
                    | lp->chip->gpio_duplex[dp->full_duplex];

                OUT(dp, VCMD_WRITE_GPIO,
                    val8, 0, 0, NULL, &err, usberr);
                delay(drv_usectohz(5000));
        } else {
                lp->gpio = GPIO_RSE | GPIO_DATA2 | GPIO_EN2;
                OUT(dp, VCMD_WRITE_GPIO, lp->gpio, 0,
                    0, NULL, &err, usberr);
                drv_usecwait(1000);

                OUT(dp, VCMD_WRITE_PHY_SELECT_88772,
                    dp->mii_phy_addr == 16 ? 1 : 0, 0, 0, NULL, &err, usberr);

                OUT(dp, VCMD_SOFTWARE_RESET_88772,
                    SWRST_IPPD | SWRST_PRL, 0, 0, NULL, &err, usberr);
                delay(drv_usectohz(150*1000));
                OUT(dp, VCMD_SOFTWARE_RESET_88772,
                    0, 0, 0, NULL, &err, usberr);

                OUT(dp, VCMD_SOFTWARE_RESET_88772,
                    dp->mii_phy_addr == 16 ? SWRST_IPRL : SWRST_PRTE,
                    0, 0, NULL, &err, usberr);
                delay(drv_usectohz(150*1000));
        }


        return (USB_SUCCESS);

usberr:
        return (USB_FAILURE);
}

static int
axf_reset_chip(struct usbgem_dev *dp)
{
        int     err = USB_SUCCESS;

        if (AX88172(dp)) {
                /* there are no ways to reset nic */
                return (USB_SUCCESS);
        }
#ifdef NEVER
        OUT(dp, VCMD_SOFTWARE_RESET_88772,
            SWRST_RR | SWRST_RT, 0, 0, NULL, &err, usberr);
        OUT(dp, VCMD_SOFTWARE_RESET_88772,
            0, 0, 0, NULL, &err, usberr);
usberr:
#endif
        return (err);
}

/*
 * Setup ax88172
 */
static int
axf_init_chip(struct usbgem_dev *dp)
{
        int             i;
        uint32_t        val;
        int             err = USB_SUCCESS;
        uint16_t        reg;
        uint8_t         buf[2];
        uint16_t        tmp16;
        struct axf_dev  *lp = dp->private;

        DPRINTF(2, (CE_CONT, "!%s: %s: called", dp->name, __func__));

        /* rx conrol register: read default value */
        if (!AX88172(dp)) {
                /* clear rx control */
                OUT(dp, VCMD_WRITE_RXCTRL, 0, 0, 0, NULL, &err, usberr);
        }

        IN(dp, VCMD_READ_RXCTRL, 0, 0, 2, buf, &err, usberr);
        lp->rcr = LE16P(buf);
        DPRINTF(0, (CE_CONT, "!%s: %s: rcr(default):%b",
            dp->name, __func__, lp->rcr, RCR_BITS));

        lp->rcr &= ~RCR_SO;

        /* Media status register */
        if (AX88172(dp)) {
#ifdef notdef
                lp->msr = MSR_TXABT;
#else
                lp->msr = 0;
#endif
        } else {
                lp->msr = MSR_RE | MSR_TXABT;
        }
        DPRINTF(0, (CE_CONT, "!%s: %s: msr:%b",
            dp->name, __func__, lp->msr, MSR_BITS));
        err = axf_set_media(dp);
        CHECK_AND_JUMP(err, usberr);

        /* write IPG0-2 registers */
        if (AX88172(dp)) {
                OUT(dp, VCMD_WRITE_IPG, lp->ipg[0], 0, 0, NULL, &err, usberr);
                OUT(dp, VCMD_WRITE_IPG1, lp->ipg[1], 0, 0, NULL, &err, usberr);
                OUT(dp, VCMD_WRITE_IPG2, lp->ipg[2], 0, 0, NULL, &err, usberr);
        } else {
                /* EMPTY */
        }
#ifdef ENABLE_RX_IN_INIT_CHIP
        /* enable Rx */
        lp->rcr |= RCR_SO;
        OUT(dp, VCMD_WRITE_RXCTRL, lp->rcr, 0, 0, NULL, &err, usberr);
#endif
usberr:
        DPRINTF(2, (CE_CONT, "!%s: %s: end (%s)",
            dp->name, __func__,
            err, err == USB_SUCCESS ? "success" : "error"));
        return (err);
}

static int
axf_start_chip(struct usbgem_dev *dp)
{
        int     err = USB_SUCCESS;
        struct axf_dev  *lp = dp->private;
#ifndef ENABLE_RX_IN_INIT_CHIP
        /* enable Rx */
        lp->rcr |= RCR_SO;
        OUT(dp, VCMD_WRITE_RXCTRL, lp->rcr, 0, 0, NULL, &err, usberr);

usberr:
        DPRINTF(2, (CE_CONT, "!%s: %s: end (%s)",
            dp->name, __func__,
            err, err == USB_SUCCESS ? "success" : "error"));
#endif
        return (err);
}

static int
axf_stop_chip(struct usbgem_dev *dp)
{
        int     err = USB_SUCCESS;
        struct axf_dev  *lp = dp->private;

        /* Disable Rx */
        lp->rcr &= ~RCR_SO;
        OUT(dp, VCMD_WRITE_RXCTRL, lp->rcr, 0, 0, NULL, &err, usberr);

        /*
         * Restore factory mac address
         * if we have changed current mac address
         */
        if (!AX88172(dp) &&
            bcmp(dp->dev_addr.ether_addr_octet,
            dp->cur_addr.ether_addr_octet,
            ETHERADDRL) != 0) {
                OUT(dp, VCMD_WRITE_NODE_ID_88772, 0, 0,
                    ETHERADDRL, dp->cur_addr.ether_addr_octet, &err, usberr);
        }
usberr:
        return (axf_reset_chip(dp));
}

static int
axf_get_stats(struct usbgem_dev *dp)
{
        /* empty */
        return (USB_SUCCESS);
}

static uint_t
axf_mcast_hash(struct usbgem_dev *dp, const uint8_t *addr)
{
        return (usbgem_ether_crc_be(addr) >> (32 - 6));
}

static int
axf_set_rx_filter(struct usbgem_dev *dp)
{
        int             i;
        uint8_t         mode;
        uint8_t         mhash[8];
        uint8_t         buf[2];
        uint_t          h;
        int             err = USB_SUCCESS;
        struct axf_dev  *lp = dp->private;

        DPRINTF(2, (CE_CONT, "!%s: %s: called, rxmode:%x",
            dp->name, __func__, dp->rxmode));

        if (lp->rcr & RCR_SO) {
                /* set promiscuous mode  before changing it. */
                OUT(dp, VCMD_WRITE_RXCTRL,
                    lp->rcr | RCR_PRO, 0, 0, NULL, &err, usberr);
        }

        lp->rcr &= ~(RCR_AP_88772 | RCR_AM | RCR_SEP | RCR_AMALL | RCR_PRO);
        mode = RCR_AB;  /* accept broadcast packets */

        bzero(mhash, sizeof (mhash));

        if (dp->rxmode & RXMODE_PROMISC) {
                /* promiscious mode implies all multicast and all physical */
                mode |= RCR_PRO;
        } else if ((dp->rxmode & RXMODE_ALLMULTI) || dp->mc_count > 32) {
                /* accept all multicast packets */
                mode |= RCR_AMALL;
        } else if (dp->mc_count > 0) {
                /*
                 * make hash table to select interresting
                 * multicast address only.
                 */
                mode |= RCR_AM;
                for (i = 0; i < dp->mc_count; i++) {
                        h = dp->mc_list[i].hash;
                        mhash[h / 8] |= 1 << (h % 8);
                }
        }
        if (AX88172(dp)) {
                if (bcmp(dp->dev_addr.ether_addr_octet,
                    dp->cur_addr.ether_addr_octet, ETHERADDRL) != 0) {
                        /*
                         * we use promiscious mode instead of changing the
                         * mac address in ax88172
                         */
                        mode |= RCR_PRO;
                }
        } else {
                OUT(dp, VCMD_WRITE_NODE_ID_88772, 0, 0,
                    ETHERADDRL, dp->cur_addr.ether_addr_octet, &err, usberr);
        }
        lp->rcr |= mode;

        /* set multicast hash table */
        if (mode & RCR_AM) {
                /* need to set up multicast hash table */
                OUT(dp, VCMD_WRITE_MCAST_FILTER, 0, 0,
                    sizeof (mhash), mhash, &err, usberr);
        }

        /* update rcr */
        OUT(dp, VCMD_WRITE_RXCTRL, lp->rcr, 0,
            0, NULL, &err, usberr);

#if DEBUG_LEVEL > 1
        /* verify rxctrl reg */
        IN(dp, VCMD_READ_RXCTRL, 0, 0, 2, buf, &err, usberr);
        cmn_err(CE_CONT, "!%s: %s: rcr:%b returned",
            dp->name, __func__, LE16P(buf), RCR_BITS);
#endif
usberr:
        DPRINTF(2, (CE_CONT, "!%s: %s: end (%s)",
            dp->name, __func__,
            err, err == USB_SUCCESS ? "success" : "error"));
        return (err);
}

static int
axf_set_media(struct usbgem_dev *dp)
{
        uint8_t val8;
        uint8_t gpio;
        uint8_t gpio_old;
        int     err = USB_SUCCESS;
        uint16_t        msr;
        struct axf_dev  *lp = dp->private;

        IN(dp, VCMD_READ_GPIO, 0, 0, 1, &gpio, &err, usberr);

        DPRINTF(0, (CE_CONT, "!%s: %s: called, gpio:%b",
            dp->name, __func__, gpio, GPIO_BITS));

        msr = lp->msr;
        gpio_old = gpio;
        gpio = lp->chip->gpio_reset[0];

        /* setup speed */
        if (AX88172(dp)) {
                /* EMPTY */
        } else {
                msr &= ~(MSR_PS | MSR_GM | MSR_ENCK);

                switch (dp->speed) {
                case USBGEM_SPD_1000:
                        msr |= MSR_GM | MSR_ENCK;
                        break;

                case USBGEM_SPD_100:
                        msr |= MSR_PS;
                        break;

                case USBGEM_SPD_10:
                        break;
                }
        }
        gpio |= lp->chip->gpio_speed[dp->speed == USBGEM_SPD_100 ? 1 : 0];

        /* select duplex */
        msr &= ~MSR_FDPX;
        if (dp->full_duplex) {
                msr |= MSR_FDPX;

                /* select flow control */
                if (AX88172(dp)) {
                        msr &= ~MSR_FCEN;
                        switch (dp->flow_control) {
                        case FLOW_CONTROL_TX_PAUSE:
                        case FLOW_CONTROL_SYMMETRIC:
                        case FLOW_CONTROL_RX_PAUSE:
                                msr |= MSR_FCEN;
                                break;
                        }
                } else {
                        msr &= ~(MSR_RFC | MSR_TFC);
                        switch (dp->flow_control) {
                        case FLOW_CONTROL_TX_PAUSE:
                                msr |= MSR_TFC;
                                break;

                        case FLOW_CONTROL_SYMMETRIC:
                                msr |= MSR_TFC | MSR_RFC;
                                break;

                        case FLOW_CONTROL_RX_PAUSE:
                                msr |= MSR_RFC;
                                break;
                        }
                }
        }
        gpio |= lp->chip->gpio_duplex[dp->full_duplex ? 1 : 0];

        /* update medium status register */
        lp->msr = msr;
        OUT(dp, VCMD_WRITE_MEDIUM_STATUS, lp->msr, 0,
            0, NULL, &err, usberr);

        if (gpio != gpio_old) {
                /* LED control required for some products */
                OUT(dp, VCMD_WRITE_GPIO,
                    gpio, 0, 0, NULL, &err, usberr);
        }

usberr:
        DPRINTF(2, (CE_CONT, "!%s: %s: end (%s)",
            dp->name, __func__,
            err, err == USB_SUCCESS ? "success" : "error"));
        return (err);
}

#define FILL_PKT_HEADER(bp, len)        {       \
        (bp)[0] = (uint8_t)(len);       \
        (bp)[1] = (uint8_t)((len) >> 8);        \
        (bp)[2] = (uint8_t)(~(len));    \
        (bp)[3] = (uint8_t)((~(len)) >> 8);     \
}

#define PKT_HEADER_SIZE 4

/*
 * send/receive packet check
 */
static mblk_t *
axf_tx_make_packet(struct usbgem_dev *dp, mblk_t *mp)
{
        int             n;
        size_t          len;
        size_t          pkt_size;
        mblk_t          *new;
        mblk_t          *tp;
        uint8_t         *bp;
        uint8_t         *last_pos;
        uint_t          align_mask;
        size_t          header_size;
        int             pad_size;

        len = msgdsize(mp);

        if (AX88172(dp)) {
#ifdef notdef
                align_mask = 63;
#else
                align_mask = 511;
#endif
                header_size = 0;

                if (len >= ETHERMIN && mp->b_cont == NULL &&
                    (len & align_mask) != 0) {
                        /* use the mp "as is" */
                        return (mp);
                }
        } else {
                align_mask = 511;
                header_size = PKT_HEADER_SIZE;
        }

        /*
         * re-allocate the mp
         */
        /* minimum ethernet packet size of ETHERMIN */
        pkt_size = max(len, ETHERMIN);

        if (((pkt_size + header_size) & align_mask) == 0) {
                /* padding is required in usb communication */
                pad_size = PKT_HEADER_SIZE;
        } else {
                pad_size = 0;
        }

        if ((new = allocb(header_size + pkt_size + pad_size, 0)) == NULL) {
                return (NULL);
        }

        bp = new->b_rptr;
        if (header_size) {
                uint16_t        tmp;

                /* add a header */
                tmp = (uint16_t)pkt_size;
                FILL_PKT_HEADER(bp, tmp);
                bp += header_size;
        }

        /* copy contents of the buffer */
        for (tp = mp; tp; tp = tp->b_cont) {
                n = (uintptr_t)tp->b_wptr - (uintptr_t)tp->b_rptr;
                bcopy(tp->b_rptr, bp, n);
                bp += n;
        }

        /* add pads for ethernet packets */
        last_pos = new->b_rptr + header_size + pkt_size;
        while (bp < last_pos) {
                *bp++ = 0;
        }

        /* add a zero-length pad segment for usb communications */
        if (pad_size) {
                /* add a dummy header for zero-length packet */
                FILL_PKT_HEADER(bp, 0);
                bp += pad_size;
        }

        /* close the payload of the packet */
        new->b_wptr = bp;

        return (new);
}

#if DEBUG_LEVEL > 10
static void
axf_dump_packet(struct usbgem_dev *dp, uint8_t *bp, int n)
{
        int     i;

        for (i = 0; i < n; i += 8, bp += 8) {
                cmn_err(CE_CONT, "%02x %02x %02x %02x %02x %02x %02x %02x",
                    bp[0], bp[1], bp[2], bp[3], bp[4], bp[5], bp[6], bp[7]);
        }
}
#endif

static mblk_t *
axf_rx_make_packet(struct usbgem_dev *dp, mblk_t *mp)
{
        mblk_t  *tp;
        uintptr_t rest;

        if (AX88172(dp)) {
                return (mp);
        }

        tp = mp;
        rest = (uintptr_t)tp->b_wptr - (uintptr_t)tp->b_rptr;

        if (rest <= PKT_HEADER_SIZE) {
                /*
                 * the usb bulk-in frame doesn't include any valid
                 * ethernet packets.
                 */
                return (NULL);
        }

        for (; ; ) {
                uint16_t        len;
                uint16_t        cksum;

                /* analyse the header of the received usb frame */
                len = LE16P(tp->b_rptr + 0);
                cksum = LE16P(tp->b_rptr + 2);

                /* test if the header is valid */
                if (len + cksum != 0xffff) {
                        /* discard whole the packet */
                        cmn_err(CE_WARN,
                            "!%s: %s: corrupted header:%04x %04x",
                            dp->name, __func__, len, cksum);
                        return (NULL);
                }
#if DEBUG_LEVEL > 0
                if (len < ETHERMIN || len > ETHERMAX) {
                        cmn_err(CE_NOTE,
                            "!%s: %s: incorrect pktsize:%d",
                            dp->name, __func__, len);
                }
#endif
                /* extract a ethernet packet from the bulk-in frame */
                tp->b_rptr += PKT_HEADER_SIZE;
                tp->b_wptr = tp->b_rptr + len;

                if (len & 1) {
                        /*
                         * skip a tailing pad byte if the packet
                         * length is odd
                         */
                        len++;
                }
                rest -= len + PKT_HEADER_SIZE;

                if (rest <= PKT_HEADER_SIZE) {
                        /* no more vaild ethernet packets */
                        break;
                }

#if DEBUG_LEVEL > 10
                axf_dump_packet(dp, tp->b_wptr, 18);
#endif
                /* allocate a mblk_t header for the next ethernet packet */
                tp->b_next = dupb(mp);
                tp->b_next->b_rptr = tp->b_rptr + len;
                tp = tp->b_next;
        }

        return (mp);
}

/*
 * MII Interfaces
 */
static uint16_t
axf_mii_read(struct usbgem_dev *dp, uint_t index, int *errp)
{
        uint8_t         buf[2];
        uint16_t        val;

        DPRINTF(4, (CE_CONT, "!%s: %s: called, ix:%d",
            dp->name, __func__, index));

        /* switch to software MII operation mode */
        OUT(dp, VCMD_SOFTWARE_MII_OP, 0, 0, 0, NULL, errp, usberr);

        /* Read MII register */
        IN(dp, VCMD_READ_MII_REG, dp->mii_phy_addr, index,
            2, buf, errp, usberr);

        /* switch to hardware MII operation mode */
        OUT(dp, VCMD_HARDWARE_MII_OP, 0, 0, 0, NULL, errp, usberr);

        return (LE16P(buf));

usberr:
        cmn_err(CE_CONT,
            "!%s: %s: usberr(%d) detected", dp->name, __func__, *errp);
        return (0);
}

static void
axf_mii_write(struct usbgem_dev *dp, uint_t index, uint16_t val, int *errp)
{
        uint8_t         buf[2];

        DPRINTF(4, (CE_CONT, "!%s: %s called, reg:%x val:%x",
            dp->name, __func__, index, val));

        /* switch software MII operation mode */
        OUT(dp, VCMD_SOFTWARE_MII_OP, 0, 0, 0, NULL, errp, usberr);

        /* Write to the specified MII register */
        buf[0] = (uint8_t)val;
        buf[1] = (uint8_t)(val >> 8);
        OUT(dp, VCMD_WRITE_MII_REG, dp->mii_phy_addr, index,
            2, buf, errp, usberr);

        /* switch to hardware MII operation mode */
        OUT(dp, VCMD_HARDWARE_MII_OP, 0, 0, 0, NULL, errp, usberr);

usberr:
        ;
}

static void
axf_interrupt(struct usbgem_dev *dp, mblk_t *mp)
{
        uint8_t *bp;
        struct axf_dev  *lp = dp->private;

        bp = mp->b_rptr;

        DPRINTF(2, (CE_CONT,
            "!%s: %s: size:%d, %02x %02x %02x %02x %02x %02x %02x %02x",
            dp->name, __func__, mp->b_wptr - mp->b_rptr,
            bp[0], bp[1], bp[2], bp[3], bp[4], bp[5], bp[6], bp[7]));

        if (lp->last_link_state ^ bp[2]) {
                usbgem_mii_update_link(dp);
        }

        lp->last_link_state = bp[2];
}

/* ======================================================== */
/*
 * OS depend (device driver DKI) routine
 */
/* ======================================================== */
#ifdef DEBUG_LEVEL
static void
axf_eeprom_dump(struct usbgem_dev *dp, int size)
{
        int     i;
        int     err;
        uint8_t w0[2], w1[2], w2[2], w3[2];

        cmn_err(CE_CONT, "!%s: eeprom dump:", dp->name);

        err = USB_SUCCESS;

        for (i = 0; i < size; i += 4) {
                IN(dp, VCMD_READ_SROM, i + 0, 0, 2, w0, &err, usberr);
                IN(dp, VCMD_READ_SROM, i + 1, 0, 2, w1, &err, usberr);
                IN(dp, VCMD_READ_SROM, i + 2, 0, 2, w2, &err, usberr);
                IN(dp, VCMD_READ_SROM, i + 3, 0, 2, w3, &err, usberr);
                cmn_err(CE_CONT, "!0x%02x: 0x%04x 0x%04x 0x%04x 0x%04x",
                    i,
                    (w0[1] << 8) | w0[0],
                    (w1[1] << 8) | w1[0],
                    (w2[1] << 8) | w2[0],
                    (w3[1] << 8) | w3[0]);
        }
usberr:
        ;
}
#endif

static int
axf_attach_chip(struct usbgem_dev *dp)
{
        uint8_t phys[2];
        int     err;
        uint_t  vcmd;
        int     ret;
#ifdef CONFIG_FULLSIZE_VLAN
        uint8_t maxpktsize[2];
        uint16_t        vlan_pktsize;
#endif
#ifdef DEBUG_LEVEL
        uint8_t val8;
#endif
        struct axf_dev  *lp = dp->private;

        DPRINTF(0, (CE_CONT, "!%s: %s enter", dp->name, __func__));

        ret = USB_SUCCESS;
        /*
         * mac address in EEPROM has loaded to ID registers.
         */
        vcmd = AX88172(dp) ? VCMD_READ_NODE_ID : VCMD_READ_NODE_ID_88772;
        IN(dp, vcmd, 0, 0,
            ETHERADDRL, dp->dev_addr.ether_addr_octet, &err, usberr);

        /*
         * setup IPG values
         */
        lp->ipg[0] = 0x15;
        lp->ipg[1] = 0x0c;
        lp->ipg[2] = 0x12;

        /*
         * We cannot scan phy because the nic returns undefined
         * value, i.e. remained garbage, when MII phy is not at the
         * specified index.
         */
#ifdef DEBUG_LEVELx
        if (lp->chip->vid == 0x07b8 && lp->chip->pid == 0x420a) {
                /*
                 * restore the original phy address of brain
                 * damaged Planex UE2-100TX
                 */
                OUT(dp, VCMD_WRITE_SROM_ENABLE, 0, 0, 0, NULL, &err, usberr);
                OUT(dp, VCMD_WRITE_SROM, 0x11, 0xe004, 0, NULL, &err, usberr);
                OUT(dp, VCMD_WRITE_SROM_DISABLE, 0, 0, 0, NULL, &err, usberr);
        }
#endif
        if (AX88172(dp)) {
                IN(dp, VCMD_READ_PHY_IDS, 0, 0, 2, &phys, &err, usberr);
                dp->mii_phy_addr = phys[1];
                DPRINTF(0, (CE_CONT, "!%s: %s: phys_addr:%d %d",
                    dp->name, __func__, phys[0], phys[1]));
        } else {
                /* use built-in phy */
                dp->mii_phy_addr = 0x10;
        }

        dp->misc_flag |= USBGEM_VLAN;
#ifdef CONFIG_FULLSIZE_VLAN
        if (AX88172(dp) || AX88772(dp)) {
                /* check max packet size in srom */
                IN(dp, VCMD_READ_SROM, 0x10, 0, 2, maxpktsize, &err, usberr);
                vlan_pktsize = ETHERMAX + ETHERFCSL + 4 /* VTAG_SIZE */;

                if (LE16P(maxpktsize) < vlan_pktsize) {
                        cmn_err(CE_CONT,
                            "!%s: %s: max packet size in srom is too small, "
                            "changing %d -> %d, do power cycle for the device",
                            dp->name, __func__,
                            LE16P(maxpktsize), vlan_pktsize);
                        OUT(dp, VCMD_WRITE_SROM_ENABLE,
                            0, 0, 0, NULL, &err, usberr);
                        OUT(dp, VCMD_WRITE_SROM, 0x10,
                            vlan_pktsize, 0, NULL, &err, usberr);
                        OUT(dp, VCMD_WRITE_SROM_DISABLE,
                            0, 0, 0, NULL, &err, usberr);

                        /* need to power off the device */
                        ret = USB_FAILURE;
                }
        }
#endif
#ifdef DEBUG_LEVEL
        IN(dp, VCMD_READ_GPIO, 0, 0, 1, &val8, &err, usberr);
        cmn_err(CE_CONT,
            "!%s: %s: ipg 0x%02x 0x%02x 0x%02x, gpio 0x%b",
            dp->name, __func__, lp->ipg[0], lp->ipg[1], lp->ipg[2],
            val8, GPIO_BITS);
#endif
        /* fix rx buffer size */
        if (!AX88172(dp)) {
                dp->rx_buf_len = 2048;
        }

#if DEBUG_LEVEL > 0
        axf_eeprom_dump(dp, 0x20);
#endif
        return (ret);

usberr:
        cmn_err(CE_WARN, "%s: %s: usb error detected (%d)",
            dp->name, __func__, err);
        return (USB_FAILURE);
}

static boolean_t
axf_scan_phy(struct usbgem_dev *dp)
{
        int     i;
        int     err;
        uint16_t        val;
        int     phy_addr_saved;
        struct axf_dev  *lp = dp->private;

        DPRINTF(0, (CE_CONT, "!%s: %s: called", dp->name, __func__));

        phy_addr_saved = dp->mii_phy_addr;

        /* special probe routine for unreliable MII addr */
#define PROBE_PAT       \
        (MII_ABILITY_100BASE_TX_FD |    \
        MII_ABILITY_100BASE_TX |        \
        MII_ABILITY_10BASE_T_FD |       \
        MII_ABILITY_10BASE_T)

        for (i = 0; i < 32; i++) {
                dp->mii_phy_addr = i;
                axf_mii_write(dp, MII_AN_ADVERT, 0, &err);
                if (err != USBGEM_SUCCESS) {
                        break;
                }
                val = axf_mii_read(dp, MII_AN_ADVERT, &err);
                if (err != USBGEM_SUCCESS) {
                        break;
                }
                if (val != 0) {
                        DPRINTF(0, (CE_CONT, "!%s: %s: index:%d,  val %b != 0",
                            dp->name, __func__, i, val, MII_ABILITY_BITS));
                        continue;
                }

                axf_mii_write(dp, MII_AN_ADVERT, PROBE_PAT, &err);
                if (err != USBGEM_SUCCESS) {
                        break;
                }
                val = axf_mii_read(dp, MII_AN_ADVERT, &err);
                if (err != USBGEM_SUCCESS) {
                        break;
                }
                if ((val & MII_ABILITY_TECH) != PROBE_PAT) {
                        DPRINTF(0, (CE_CONT, "!%s: %s: "
                            "index:%d,  pat:%x != val:%b",
                            dp->name, __func__, i,
                            PROBE_PAT, val, MII_ABILITY_BITS));
                        continue;
                }

                /* found */
                dp->mii_phy_addr = phy_addr_saved;
                return (i);
        }
#undef PROBE_PAT
        if (i == 32) {
                cmn_err(CE_CONT, "!%s: %s: no mii phy found",
                    dp->name, __func__);
        } else {
                cmn_err(CE_CONT, "!%s: %s: i/o error while scanning phy",
                    dp->name, __func__);
        }
        dp->mii_phy_addr = phy_addr_saved;
        return (-1);
}

static int
axf_mii_probe(struct usbgem_dev *dp)
{
        int     my_guess;
        int     err;
        uint8_t old_11th[2];
        uint8_t new_11th[2];
        struct axf_dev  *lp = dp->private;

        DPRINTF(0, (CE_CONT, "!%s: %s: called", dp->name, __func__));
        (void) axf_reset_phy(dp);
        lp->phy_has_reset = B_TRUE;

        if (AX88172(dp)) {
                my_guess = axf_scan_phy(dp);
                if (my_guess >= 0 && my_guess < 32 &&
                    my_guess != dp->mii_phy_addr) {
                        /*
                         * phy addr in srom is wrong, need to fix it
                         */
                        IN(dp, VCMD_READ_SROM,
                            0x11, 0, 2, old_11th, &err, usberr);

                        new_11th[0] = my_guess;
                        new_11th[1] = old_11th[1];

                        OUT(dp, VCMD_WRITE_SROM_ENABLE,
                            0, 0, 0, NULL, &err, usberr);
                        OUT(dp, VCMD_WRITE_SROM,
                            0x11, LE16P(new_11th), 0, NULL, &err, usberr);
                        OUT(dp, VCMD_WRITE_SROM_DISABLE,
                            0, 0, 0, NULL, &err, usberr);
#if 1
                        /* XXX - read back, but it doesn't work, why? */
                        delay(drv_usectohz(1000*1000));
                        IN(dp, VCMD_READ_SROM,
                            0x11, 0, 2, new_11th, &err, usberr);
#endif
                        cmn_err(CE_NOTE, "!%s: %s: phy addr in srom fixed: "
                            "%04x -> %04x",
                            dp->name, __func__,
                            LE16P(old_11th), LE16P(new_11th));
                        return (USBGEM_FAILURE);
usberr:
                        cmn_err(CE_NOTE,
                            "!%s: %s:  failed to patch phy addr, "
                            "current: %04x",
                            dp->name, __func__, LE16P(old_11th));
                        return (USBGEM_FAILURE);
                }
        }
        return (usbgem_mii_probe_default(dp));
}

static int
axf_mii_init(struct usbgem_dev *dp)
{
        struct axf_dev  *lp = dp->private;

        DPRINTF(2, (CE_CONT, "!%s: %s: called", dp->name, __func__));

        if (!lp->phy_has_reset) {
                (void) axf_reset_phy(dp);
        }

        /* prepare to reset phy on the next reconnect or resume */
        lp->phy_has_reset = B_FALSE;

        return (USB_SUCCESS);
}

static int
axfattach(dev_info_t *dip, ddi_attach_cmd_t cmd)
{
        int                     i;
        ddi_iblock_cookie_t     c;
        int                     ret;
        int                     revid;
        int                     unit;
        int                     vid;
        int                     pid;
        struct chip_info        *p;
        int                     len;
        const char              *drv_name;
        struct usbgem_dev       *dp;
        void                    *base;
        struct usbgem_conf      *ugcp;
        struct axf_dev          *lp;

        unit = ddi_get_instance(dip);
        drv_name = ddi_driver_name(dip);

        DPRINTF(3, (CE_CONT, "!%s%d: %s: called, cmd:%d",
            drv_name, unit, __func__, cmd));

        if (cmd == DDI_ATTACH) {
                /*
                 * Check if the chip is supported.
                 */
                vid = ddi_prop_get_int(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
                    "usb-vendor-id", -1);
                pid = ddi_prop_get_int(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
                    "usb-product-id", -1);
                revid = ddi_prop_get_int(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
                    "usb-revision-id", -1);

                for (i = 0, p = chiptbl_88x7x; i < CHIPTABLESIZE; i++, p++) {
                        if (p->vid == vid && p->pid == pid) {
                                /* found */
                                cmn_err(CE_CONT, "!%s%d: %s "
                                    "(vid: 0x%04x, did: 0x%04x, revid: 0x%02x)",
                                    drv_name, unit, p->name, vid, pid, revid);
                                goto chip_found;
                        }
                }

                /* Not found */
                cmn_err(CE_WARN, "!%s: %s: wrong usb venid/prodid (0x%x, 0x%x)",
                    drv_name, __func__, vid, pid);

                /* assume 88772 */
                p = &chiptbl_88x7x[CHIPTABLESIZE - 1];
chip_found:
                /*
                 * construct usbgem configration
                 */
                ugcp = kmem_zalloc(sizeof (*ugcp), KM_SLEEP);

                /* name */
                /*
                 * softmac requires that ppa is the instance number
                 * of the device, otherwise it hangs in seaching the device.
                 */
                (void) sprintf(ugcp->usbgc_name, "%s%d", drv_name, unit);
                ugcp->usbgc_ppa = unit;

                ugcp->usbgc_ifnum = 0;
                ugcp->usbgc_alt = 0;

                ugcp->usbgc_tx_list_max = 64;

                ugcp->usbgc_rx_header_len = 0;
                ugcp->usbgc_rx_list_max = 64;

                /* time out parameters */
                ugcp->usbgc_tx_timeout = USBGEM_TX_TIMEOUT;
                ugcp->usbgc_tx_timeout_interval = USBGEM_TX_TIMEOUT_INTERVAL;

                /* flow control */
                /*
                 * XXX - flow control caused link down frequently under
                 * heavy traffic
                 */
                ugcp->usbgc_flow_control = FLOW_CONTROL_RX_PAUSE;

                /* MII timeout parameters */
                ugcp->usbgc_mii_link_watch_interval = ONESEC;
                ugcp->usbgc_mii_an_watch_interval = ONESEC/5;
                ugcp->usbgc_mii_reset_timeout = MII_RESET_TIMEOUT; /* 1 sec */
                ugcp->usbgc_mii_an_timeout = MII_AN_TIMEOUT;    /* 5 sec */
                ugcp->usbgc_mii_an_wait = 0;
                ugcp->usbgc_mii_linkdown_timeout = MII_LINKDOWN_TIMEOUT;

                ugcp->usbgc_mii_an_delay = ONESEC/10;
                ugcp->usbgc_mii_linkdown_action = MII_ACTION_RSA;
                ugcp->usbgc_mii_linkdown_timeout_action = MII_ACTION_RESET;
                ugcp->usbgc_mii_dont_reset = B_FALSE;
                ugcp->usbgc_mii_hw_link_detection = B_TRUE;
                ugcp->usbgc_mii_stop_mac_on_linkdown = B_FALSE;

                /* I/O methods */

                /* mac operation */
                ugcp->usbgc_attach_chip = &axf_attach_chip;
                ugcp->usbgc_reset_chip = &axf_reset_chip;
                ugcp->usbgc_init_chip = &axf_init_chip;
                ugcp->usbgc_start_chip = &axf_start_chip;
                ugcp->usbgc_stop_chip = &axf_stop_chip;
                ugcp->usbgc_multicast_hash = &axf_mcast_hash;

                ugcp->usbgc_set_rx_filter = &axf_set_rx_filter;
                ugcp->usbgc_set_media = &axf_set_media;
                ugcp->usbgc_get_stats = &axf_get_stats;
                ugcp->usbgc_interrupt = &axf_interrupt;

                /* packet operation */
                ugcp->usbgc_tx_make_packet = &axf_tx_make_packet;
                ugcp->usbgc_rx_make_packet = &axf_rx_make_packet;

                /* mii operations */
                ugcp->usbgc_mii_probe = &axf_mii_probe;
                ugcp->usbgc_mii_init = &axf_mii_init;
                ugcp->usbgc_mii_config = &usbgem_mii_config_default;
                ugcp->usbgc_mii_read = &axf_mii_read;
                ugcp->usbgc_mii_write = &axf_mii_write;

                /* mtu */
                ugcp->usbgc_min_mtu = ETHERMTU;
                ugcp->usbgc_max_mtu = ETHERMTU;
                ugcp->usbgc_default_mtu = ETHERMTU;

                lp = kmem_zalloc(sizeof (struct axf_dev), KM_SLEEP);
                lp->chip = p;
                lp->last_link_state = 0;
                lp->phy_has_reset = B_FALSE;

                dp = usbgem_do_attach(dip, ugcp, lp, sizeof (struct axf_dev));

                kmem_free(ugcp, sizeof (*ugcp));

                if (dp != NULL) {
                        return (DDI_SUCCESS);
                }

                kmem_free(lp, sizeof (struct axf_dev));
                return (DDI_FAILURE);
        }

        if (cmd == DDI_RESUME) {
                return (usbgem_resume(dip));
        }

        return (DDI_FAILURE);
}

static int
axfdetach(dev_info_t *dip, ddi_detach_cmd_t cmd)
{
        int     ret;

        if (cmd == DDI_DETACH) {
                ret = usbgem_do_detach(dip);
                if (ret != DDI_SUCCESS) {
                        return (DDI_FAILURE);
                }
                return (DDI_SUCCESS);
        }
        if (cmd == DDI_SUSPEND) {
                return (usbgem_suspend(dip));
        }
        return (DDI_FAILURE);
}

/* ======================================================== */
/*
 * OS depend (loadable streams driver) routine
 */
/* ======================================================== */
USBGEM_STREAM_OPS(axf_ops, axfattach, axfdetach);

static struct modldrv modldrv = {
        &mod_driverops, /* Type of module.  This one is a driver */
        ident,
        &axf_ops,       /* driver ops */
};

static struct modlinkage modlinkage = {
        MODREV_1, &modldrv, NULL
};

/* ======================================================== */
/*
 * _init : done
 */
/* ======================================================== */
int
_init(void)
{
        int     status;

        DPRINTF(2, (CE_CONT, "!axf: _init: called"));

        status = usbgem_mod_init(&axf_ops, "axf");
        if (status != DDI_SUCCESS) {
                return (status);
        }
        status = mod_install(&modlinkage);
        if (status != DDI_SUCCESS) {
                usbgem_mod_fini(&axf_ops);
        }
        return (status);
}

/*
 * _fini : done
 */
int
_fini(void)
{
        int     status;

        DPRINTF(2, (CE_CONT, "!axf: _fini: called"));
        status = mod_remove(&modlinkage);
        if (status == DDI_SUCCESS) {
                usbgem_mod_fini(&axf_ops);
        }
        return (status);
}

int
_info(struct modinfo *modinfop)
{
        return (mod_info(&modlinkage, modinfop));
}