io/axf/axf_usbgem.c

/*
 * 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.
 */

#pragma ident "@(#)axf_usbgem.c 1.3 12/02/09"

/*
 *  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);
}

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]);
    }
}

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);
        }

err_free_mem:
        kmem_free(lp, sizeof (struct axf_dev));
err_close_pipe:
err:
        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
 */
/* ======================================================== */
#ifdef USBGEM_CONFIG_GLDv3
USBGEM_STREAM_OPS(axf_ops, axfattach, axfdetach);
#else
static  struct module_info axfminfo = {
    0,          /* mi_idnum */
    "axf",          /* mi_idname */
    0,          /* mi_minpsz */
    ETHERMTU,       /* mi_maxpsz */
    ETHERMTU*128,       /* mi_hiwat */
    1,          /* mi_lowat */
};

static  struct qinit axfrinit = {
    (int (*)()) NULL,   /* qi_putp */
    usbgem_rsrv,        /* qi_srvp */
    usbgem_open,        /* qi_qopen */
    usbgem_close,       /* qi_qclose */
    (int (*)()) NULL,   /* qi_qadmin */
    &axfminfo,      /* qi_minfo */
    NULL            /* qi_mstat */
};

static  struct qinit axfwinit = {
    usbgem_wput,        /* qi_putp */
    usbgem_wsrv,        /* qi_srvp */
    (int (*)()) NULL,   /* qi_qopen */
    (int (*)()) NULL,   /* qi_qclose */
    (int (*)()) NULL,   /* qi_qadmin */
    &axfminfo,      /* qi_minfo */
    NULL            /* qi_mstat */
};

static struct streamtab axf_info = {
    &axfrinit,  /* st_rdinit */
    &axfwinit,  /* st_wrinit */
    NULL,       /* st_muxrinit */
    NULL        /* st_muxwrinit */
};

static  struct cb_ops cb_axf_ops = {
    nulldev,    /* cb_open */
    nulldev,    /* cb_close */
    nodev,      /* cb_strategy */
    nodev,      /* cb_print */
    nodev,      /* cb_dump */
    nodev,      /* cb_read */
    nodev,      /* cb_write */
    nodev,      /* cb_ioctl */
    nodev,      /* cb_devmap */
    nodev,      /* cb_mmap */
    nodev,      /* cb_segmap */
    nochpoll,   /* cb_chpoll */
    ddi_prop_op,    /* cb_prop_op */
    &axf_info,  /* cb_stream */
    D_NEW|D_MP  /* cb_flag */
};

static  struct dev_ops axf_ops = {
    DEVO_REV,   /* devo_rev */
    0,      /* devo_refcnt */
    usbgem_getinfo, /* devo_getinfo */
    nulldev,    /* devo_identify */
    nulldev,    /* devo_probe */
    axfattach,  /* devo_attach */
    axfdetach,  /* devo_detach */
    nodev,      /* devo_reset */
    &cb_axf_ops,    /* devo_cb_ops */
    NULL,       /* devo_bus_ops */
    usbgem_power,   /* devo_power */
#if DEVO_REV >= 4
    usbgem_quiesce, /* devo_quiesce */
#endif
};
#endif

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));
}