Remove compat junk.

[dragonfly/netmp.git] / sys / dev / netif / cue / if_cue.c

/*
 * Copyright (c) 1997, 1998, 1999, 2000
 *      Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD: src/sys/dev/usb/if_cue.c,v 1.45 2003/12/08 07:54:14 obrien Exp $
 * $DragonFly: src/sys/dev/netif/cue/if_cue.c,v 1.21 2005/05/25 11:59:14 joerg Exp $
 */

/*
 * CATC USB-EL1210A USB to ethernet driver. Used in the CATC Netmate
 * adapters and others.
 *
 * Written by Bill Paul <wpaul@ee.columbia.edu>
 * Electrical Engineering Department
 * Columbia University, New York City
 */

/*
 * The CATC USB-EL1210A provides USB ethernet support at 10Mbps. The
 * RX filter uses a 512-bit multicast hash table, single perfect entry
 * for the station address, and promiscuous mode. Unlike the ADMtek
 * and KLSI chips, the CATC ASIC supports read and write combining
 * mode where multiple packets can be transfered using a single bulk
 * transaction, which helps performance a great deal.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/socket.h>

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

#include <net/bpf.h>

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

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

#include "if_cuereg.h"

/*
 * Various supported device vendors/products.
 */
Static struct cue_type cue_devs[] = {
        { USB_VENDOR_CATC, USB_PRODUCT_CATC_NETMATE },
        { USB_VENDOR_CATC, USB_PRODUCT_CATC_NETMATE2 },
        { USB_VENDOR_SMARTBRIDGES, USB_PRODUCT_SMARTBRIDGES_SMARTLINK },
        { 0, 0 }
};

Static int cue_match(device_ptr_t);
Static int cue_attach(device_ptr_t);
Static int cue_detach(device_ptr_t);

Static int cue_tx_list_init(struct cue_softc *);
Static int cue_rx_list_init(struct cue_softc *);
Static int cue_newbuf(struct cue_softc *, struct cue_chain *, struct mbuf *);
Static int cue_encap(struct cue_softc *, struct mbuf *, int);
Static void cue_rxeof(usbd_xfer_handle, usbd_private_handle, usbd_status);
Static void cue_txeof(usbd_xfer_handle, usbd_private_handle, usbd_status);
Static void cue_tick(void *);
Static void cue_rxstart(struct ifnet *);
Static void cue_start(struct ifnet *);
Static int cue_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
Static void cue_init(void *);
Static void cue_stop(struct cue_softc *);
Static void cue_watchdog(struct ifnet *);
Static void cue_shutdown(device_ptr_t);

Static void cue_setmulti(struct cue_softc *);
Static void cue_reset(struct cue_softc *);

Static int cue_csr_read_1(struct cue_softc *, int);
Static int cue_csr_write_1(struct cue_softc *, int, int);
Static int cue_csr_read_2(struct cue_softc *, int);
#ifdef notdef
Static int cue_csr_write_2(struct cue_softc *, int, int);
#endif
Static int cue_mem(struct cue_softc *, int, int, void *, int);
Static int cue_getmac(struct cue_softc *, void *);

Static device_method_t cue_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,         cue_match),
        DEVMETHOD(device_attach,        cue_attach),
        DEVMETHOD(device_detach,        cue_detach),
        DEVMETHOD(device_shutdown,      cue_shutdown),

        { 0, 0 }
};

Static driver_t cue_driver = {
        "cue",
        cue_methods,
        sizeof(struct cue_softc)
};

Static devclass_t cue_devclass;

DECLARE_DUMMY_MODULE(if_cue);
DRIVER_MODULE(cue, uhub, cue_driver, cue_devclass, usbd_driver_load, 0);
MODULE_DEPEND(cue, usb, 1, 1, 1);

#define CUE_SETBIT(sc, reg, x)                          \
        cue_csr_write_1(sc, reg, cue_csr_read_1(sc, reg) | (x))

#define CUE_CLRBIT(sc, reg, x)                          \
        cue_csr_write_1(sc, reg, cue_csr_read_1(sc, reg) & ~(x))

Static int
cue_csr_read_1(struct cue_softc *sc, int reg)
{
        usb_device_request_t    req;
        usbd_status             err;
        u_int8_t                val = 0;

        if (sc->cue_dying)
                return(0);

        CUE_LOCK(sc);

        req.bmRequestType = UT_READ_VENDOR_DEVICE;
        req.bRequest = CUE_CMD_READREG;
        USETW(req.wValue, 0);
        USETW(req.wIndex, reg);
        USETW(req.wLength, 1);

        err = usbd_do_request(sc->cue_udev, &req, &val);

        CUE_UNLOCK(sc);

        if (err)
                return(0);

        return(val);
}

Static int
cue_csr_read_2(struct cue_softc *sc, int reg)
{
        usb_device_request_t    req;
        usbd_status             err;
        u_int16_t               val = 0;

        if (sc->cue_dying)
                return(0);

        CUE_LOCK(sc);

        req.bmRequestType = UT_READ_VENDOR_DEVICE;
        req.bRequest = CUE_CMD_READREG;
        USETW(req.wValue, 0);
        USETW(req.wIndex, reg);
        USETW(req.wLength, 2);

        err = usbd_do_request(sc->cue_udev, &req, &val);

        CUE_UNLOCK(sc);

        if (err)
                return(0);

        return(val);
}

Static int
cue_csr_write_1(struct cue_softc *sc, int reg, int val)
{
        usb_device_request_t    req;
        usbd_status             err;

        if (sc->cue_dying)
                return(0);

        CUE_LOCK(sc);

        req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        req.bRequest = CUE_CMD_WRITEREG;
        USETW(req.wValue, val);
        USETW(req.wIndex, reg);
        USETW(req.wLength, 0);

        err = usbd_do_request(sc->cue_udev, &req, NULL);

        CUE_UNLOCK(sc);

        if (err)
                return(-1);

        return(0);
}

#ifdef notdef
Static int
cue_csr_write_2(struct cue_softc *sc, int reg, int val)
{
        usb_device_request_t    req;
        usbd_status             err;

        if (sc->cue_dying)
                return(0);

        CUE_LOCK(sc);

        req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        req.bRequest = CUE_CMD_WRITEREG;
        USETW(req.wValue, val);
        USETW(req.wIndex, reg);
        USETW(req.wLength, 0);

        err = usbd_do_request(sc->cue_udev, &req, NULL);

        CUE_UNLOCK(sc);

        if (err)
                return(-1);

        return(0);
}
#endif

Static int
cue_mem(struct cue_softc *sc, int cmd, int addr, void *buf, int len)
{
        usb_device_request_t    req;
        usbd_status             err;

        if (sc->cue_dying)
                return(0);

        CUE_LOCK(sc);

        if (cmd == CUE_CMD_READSRAM)
                req.bmRequestType = UT_READ_VENDOR_DEVICE;
        else
                req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        req.bRequest = cmd;
        USETW(req.wValue, 0);
        USETW(req.wIndex, addr);
        USETW(req.wLength, len);

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

        CUE_UNLOCK(sc);

        if (err)
                return(-1);

        return(0);
}

Static int
cue_getmac(struct cue_softc *sc, void *buf)
{
        usb_device_request_t    req;
        usbd_status             err;

        if (sc->cue_dying)
                return(0);

        CUE_LOCK(sc);

        req.bmRequestType = UT_READ_VENDOR_DEVICE;
        req.bRequest = CUE_CMD_GET_MACADDR;
        USETW(req.wValue, 0);
        USETW(req.wIndex, 0);
        USETW(req.wLength, ETHER_ADDR_LEN);

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

        CUE_UNLOCK(sc);

        if (err) {
                if_printf(&sc->arpcom.ac_if, "read MAC address failed\n");
                return(-1);
        }

        return(0);
}

#define CUE_BITS        9

Static void
cue_setmulti(struct cue_softc *sc)
{
        struct ifnet            *ifp;
        struct ifmultiaddr      *ifma;
        u_int32_t               h = 0, i;

        ifp = &sc->arpcom.ac_if;

        if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
                for (i = 0; i < CUE_MCAST_TABLE_LEN; i++)
                        sc->cue_mctab[i] = 0xFF;
                cue_mem(sc, CUE_CMD_WRITESRAM, CUE_MCAST_TABLE_ADDR,
                    &sc->cue_mctab, CUE_MCAST_TABLE_LEN);
                return;
        }

        /* first, zot all the existing hash bits */
        for (i = 0; i < CUE_MCAST_TABLE_LEN; i++)
                sc->cue_mctab[i] = 0;

        /* now program new ones */
        LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
        {
                if (ifma->ifma_addr->sa_family != AF_LINK)
                        continue;
                h = ether_crc32_le(
                    LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
                    ETHER_ADDR_LEN) & ((1 << CUE_BITS) - 1);
                sc->cue_mctab[h >> 3] |= 1 << (h & 0x7);
        }

        /*
         * Also include the broadcast address in the filter
         * so we can receive broadcast frames.
         */
        if (ifp->if_flags & IFF_BROADCAST) {
                h = ether_crc32_le(ifp->if_broadcastaddr, ETHER_ADDR_LEN) &
                    ((1 << CUE_BITS) - 1);
                sc->cue_mctab[h >> 3] |= 1 << (h & 0x7);
        }

        cue_mem(sc, CUE_CMD_WRITESRAM, CUE_MCAST_TABLE_ADDR,
            &sc->cue_mctab, CUE_MCAST_TABLE_LEN);

        return;
}

Static void
cue_reset(struct cue_softc *sc)
{
        usb_device_request_t    req;
        usbd_status             err;

        if (sc->cue_dying)
                return;

        req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        req.bRequest = CUE_CMD_RESET;
        USETW(req.wValue, 0);
        USETW(req.wIndex, 0);
        USETW(req.wLength, 0);
        err = usbd_do_request(sc->cue_udev, &req, NULL);
        if (err)
                if_printf(&sc->arpcom.ac_if, "reset failed\n");

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

/*
 * Probe for a Pegasus chip.
 */
USB_MATCH(cue)
{
        USB_MATCH_START(cue, uaa);
        struct cue_type                 *t;

        if (!uaa->iface)
                return(UMATCH_NONE);

        t = cue_devs;
        while(t->cue_vid) {
                if (uaa->vendor == t->cue_vid &&
                    uaa->product == t->cue_did) {
                        return(UMATCH_VENDOR_PRODUCT);
                }
                t++;
        }

        return(UMATCH_NONE);
}

/*
 * Attach the interface. Allocate softc structures, do ifmedia
 * setup and ethernet/BPF attach.
 */
USB_ATTACH(cue)
{
        USB_ATTACH_START(cue, sc, uaa);
        char                    devinfo[1024];
        u_char                  eaddr[ETHER_ADDR_LEN];
        struct ifnet            *ifp;
        usb_interface_descriptor_t      *id;
        usb_endpoint_descriptor_t       *ed;
        int                     i;

        bzero(sc, sizeof(struct cue_softc));
        sc->cue_iface = uaa->iface;
        sc->cue_udev = uaa->device;
        callout_init(&sc->cue_stat_timer);

        if (usbd_set_config_no(sc->cue_udev, CUE_CONFIG_NO, 0)) {
                device_printf(self, "setting config no %d failed\n",
                              CUE_CONFIG_NO);
                USB_ATTACH_ERROR_RETURN;
        }

        id = usbd_get_interface_descriptor(uaa->iface);

        usbd_devinfo(uaa->device, 0, devinfo);
        device_set_desc_copy(self, devinfo);
        device_printf(self, "%s\n", devinfo);

        /* Find endpoints. */
        for (i = 0; i < id->bNumEndpoints; i++) {
                ed = usbd_interface2endpoint_descriptor(uaa->iface, i);
                if (!ed) {
                        device_printf(self, "couldn't get ep %d\n", i);
                        USB_ATTACH_ERROR_RETURN;
                }
                if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
                    UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
                        sc->cue_ed[CUE_ENDPT_RX] = ed->bEndpointAddress;
                } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
                           UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
                        sc->cue_ed[CUE_ENDPT_TX] = ed->bEndpointAddress;
                } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
                           UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
                        sc->cue_ed[CUE_ENDPT_INTR] = ed->bEndpointAddress;
                }
        }

        CUE_LOCK(sc);

        ifp = &sc->arpcom.ac_if;
        if_initname(ifp, device_get_name(self), device_get_unit(self));

#ifdef notdef
        /* Reset the adapter. */
        cue_reset(sc);
#endif
        /*
         * Get station address.
         */
        cue_getmac(sc, &eaddr);

        ifp->if_softc = sc;
        ifp->if_mtu = ETHERMTU;
        ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
        ifp->if_ioctl = cue_ioctl;
        ifp->if_start = cue_start;
        ifp->if_watchdog = cue_watchdog;
        ifp->if_init = cue_init;
        ifp->if_baudrate = 10000000;
        ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
        ifq_set_ready(&ifp->if_snd);

        /*
         * Call MI attach routine.
         */
        ether_ifattach(ifp, eaddr);
        usb_register_netisr();
        sc->cue_dying = 0;

        CUE_UNLOCK(sc);
        USB_ATTACH_SUCCESS_RETURN;
}

Static int
cue_detach(device_ptr_t dev)
{
        struct cue_softc        *sc;
        struct ifnet            *ifp;

        sc = device_get_softc(dev);
        CUE_LOCK(sc);
        ifp = &sc->arpcom.ac_if;

        sc->cue_dying = 1;
        callout_stop(&sc->cue_stat_timer);
        ether_ifdetach(ifp);

        if (sc->cue_ep[CUE_ENDPT_TX] != NULL)
                usbd_abort_pipe(sc->cue_ep[CUE_ENDPT_TX]);
        if (sc->cue_ep[CUE_ENDPT_RX] != NULL)
                usbd_abort_pipe(sc->cue_ep[CUE_ENDPT_RX]);
        if (sc->cue_ep[CUE_ENDPT_INTR] != NULL)
                usbd_abort_pipe(sc->cue_ep[CUE_ENDPT_INTR]);

        CUE_UNLOCK(sc);

        return(0);
}

/*
 * Initialize an RX descriptor and attach an MBUF cluster.
 */
Static int
cue_newbuf(struct cue_softc *sc, struct cue_chain *c, struct mbuf *m)
{
        struct mbuf             *m_new = NULL;

        if (m == NULL) {
                MGETHDR(m_new, MB_DONTWAIT, MT_DATA);
                if (m_new == NULL) {
                        if_printf(&sc->arpcom.ac_if, "no memory for rx list "
                                  "-- packet dropped!\n");
                        return(ENOBUFS);
                }

                MCLGET(m_new, MB_DONTWAIT);
                if (!(m_new->m_flags & M_EXT)) {
                        if_printf(&sc->arpcom.ac_if, "no memory for rx list "
                                  "-- packet dropped!\n");
                        m_freem(m_new);
                        return(ENOBUFS);
                }
                m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
        } else {
                m_new = m;
                m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
                m_new->m_data = m_new->m_ext.ext_buf;
        }

        m_adj(m_new, ETHER_ALIGN);
        c->cue_mbuf = m_new;

        return(0);
}

Static int
cue_rx_list_init(struct cue_softc *sc)
{
        struct cue_cdata        *cd;
        struct cue_chain        *c;
        int                     i;

        cd = &sc->cue_cdata;
        for (i = 0; i < CUE_RX_LIST_CNT; i++) {
                c = &cd->cue_rx_chain[i];
                c->cue_sc = sc;
                c->cue_idx = i;
                if (cue_newbuf(sc, c, NULL) == ENOBUFS)
                        return(ENOBUFS);
                if (c->cue_xfer == NULL) {
                        c->cue_xfer = usbd_alloc_xfer(sc->cue_udev);
                        if (c->cue_xfer == NULL)
                                return(ENOBUFS);
                }
        }

        return(0);
}

Static int
cue_tx_list_init(struct cue_softc *sc)
{
        struct cue_cdata        *cd;
        struct cue_chain        *c;
        int                     i;

        cd = &sc->cue_cdata;
        for (i = 0; i < CUE_TX_LIST_CNT; i++) {
                c = &cd->cue_tx_chain[i];
                c->cue_sc = sc;
                c->cue_idx = i;
                c->cue_mbuf = NULL;
                if (c->cue_xfer == NULL) {
                        c->cue_xfer = usbd_alloc_xfer(sc->cue_udev);
                        if (c->cue_xfer == NULL)
                                return(ENOBUFS);
                }
                c->cue_buf = malloc(CUE_BUFSZ, M_USBDEV, M_WAITOK);
        }

        return(0);
}

Static void
cue_rxstart(struct ifnet *ifp)
{
        struct cue_softc        *sc;
        struct cue_chain        *c;

        sc = ifp->if_softc;
        CUE_LOCK(sc);
        c = &sc->cue_cdata.cue_rx_chain[sc->cue_cdata.cue_rx_prod];

        if (cue_newbuf(sc, c, NULL) == ENOBUFS) {
                ifp->if_ierrors++;
                CUE_UNLOCK(sc);
                return;
        }

        /* Setup new transfer. */
        usbd_setup_xfer(c->cue_xfer, sc->cue_ep[CUE_ENDPT_RX],
            c, mtod(c->cue_mbuf, char *), CUE_BUFSZ, USBD_SHORT_XFER_OK,
            USBD_NO_TIMEOUT, cue_rxeof);
        usbd_transfer(c->cue_xfer);
        CUE_UNLOCK(sc);

        return;
}

/*
 * A frame has been uploaded: pass the resulting mbuf chain up to
 * the higher level protocols.
 */
Static void
cue_rxeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
{
        struct cue_softc        *sc;
        struct cue_chain        *c;
        struct mbuf             *m;
        struct ifnet            *ifp;
        int                     total_len = 0;
        u_int16_t               len;

        c = priv;
        sc = c->cue_sc;
        CUE_LOCK(sc);
        ifp = &sc->arpcom.ac_if;

        if (!(ifp->if_flags & IFF_RUNNING)) {
                CUE_UNLOCK(sc);
                return;
        }

        if (status != USBD_NORMAL_COMPLETION) {
                if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) {
                        CUE_UNLOCK(sc);
                        return;
                }
                if (usbd_ratecheck(&sc->cue_rx_notice)) {
                        if_printf(ifp, "usb error on rx: %s\n",
                                  usbd_errstr(status));
                }
                if (status == USBD_STALLED)
                        usbd_clear_endpoint_stall(sc->cue_ep[CUE_ENDPT_RX]);
                goto done;
        }

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

        m = c->cue_mbuf;
        len = *mtod(m, u_int16_t *);

        /* No errors; receive the packet. */
        total_len = len;

        if (len < sizeof(struct ether_header)) {
                ifp->if_ierrors++;
                goto done;
        }

        ifp->if_ipackets++;
        m_adj(m, sizeof(u_int16_t));
        m->m_pkthdr.rcvif = ifp;
        m->m_pkthdr.len = m->m_len = total_len;

        /* Put the packet on the special USB input queue. */
        usb_ether_input(m);
        cue_rxstart(ifp);

        CUE_UNLOCK(sc);

        return;
done:
        /* Setup new transfer. */
        usbd_setup_xfer(c->cue_xfer, sc->cue_ep[CUE_ENDPT_RX],
            c, mtod(c->cue_mbuf, char *), CUE_BUFSZ, USBD_SHORT_XFER_OK,
            USBD_NO_TIMEOUT, cue_rxeof);
        usbd_transfer(c->cue_xfer);
        CUE_UNLOCK(sc);

        return;
}

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

Static void
cue_txeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
{
        struct cue_softc        *sc;
        struct cue_chain        *c;
        struct ifnet            *ifp;
        usbd_status             err;

        c = priv;
        sc = c->cue_sc;
        CUE_LOCK(sc);
        ifp = &sc->arpcom.ac_if;

        if (status != USBD_NORMAL_COMPLETION) {
                if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) {
                        CUE_UNLOCK(sc);
                        return;
                }
                if_printf(ifp, "usb error on tx: %s\n", usbd_errstr(status));
                if (status == USBD_STALLED)
                        usbd_clear_endpoint_stall(sc->cue_ep[CUE_ENDPT_TX]);
                CUE_UNLOCK(sc);
                return;
        }

        ifp->if_timer = 0;
        ifp->if_flags &= ~IFF_OACTIVE;
        usbd_get_xfer_status(c->cue_xfer, NULL, NULL, NULL, &err);

        if (c->cue_mbuf != NULL) {
                m_freem(c->cue_mbuf);
                c->cue_mbuf = NULL;
        }

        if (err)
                ifp->if_oerrors++;
        else
                ifp->if_opackets++;

        if (!ifq_is_empty(&ifp->if_snd))
                (*ifp->if_start)(ifp);

        CUE_UNLOCK(sc);

        return;
}

Static void
cue_tick(void *xsc)
{
        struct cue_softc        *sc;
        struct ifnet            *ifp;

        sc = xsc;

        if (sc == NULL)
                return;

        CUE_LOCK(sc);

        ifp = &sc->arpcom.ac_if;

        ifp->if_collisions += cue_csr_read_2(sc, CUE_TX_SINGLECOLL);
        ifp->if_collisions += cue_csr_read_2(sc, CUE_TX_MULTICOLL);
        ifp->if_collisions += cue_csr_read_2(sc, CUE_TX_EXCESSCOLL);

        if (cue_csr_read_2(sc, CUE_RX_FRAMEERR))
                ifp->if_ierrors++;

        callout_reset(&sc->cue_stat_timer, hz, cue_tick, sc);

        CUE_UNLOCK(sc);

        return;
}

Static int
cue_encap(struct cue_softc *sc, struct mbuf *m, int idx)
{
        int                     total_len;
        struct cue_chain        *c;
        usbd_status             err;

        c = &sc->cue_cdata.cue_tx_chain[idx];

        /*
         * Copy the mbuf data into a contiguous buffer, leaving two
         * bytes at the beginning to hold the frame length.
         */
        m_copydata(m, 0, m->m_pkthdr.len, c->cue_buf + 2);
        c->cue_mbuf = m;

        total_len = m->m_pkthdr.len + 2;

        /* The first two bytes are the frame length */
        c->cue_buf[0] = (u_int8_t)m->m_pkthdr.len;
        c->cue_buf[1] = (u_int8_t)(m->m_pkthdr.len >> 8);

        usbd_setup_xfer(c->cue_xfer, sc->cue_ep[CUE_ENDPT_TX],
            c, c->cue_buf, total_len, 0, 10000, cue_txeof);

        /* Transmit */
        err = usbd_transfer(c->cue_xfer);
        if (err != USBD_IN_PROGRESS) {
                cue_stop(sc);
                return(EIO);
        }

        sc->cue_cdata.cue_tx_cnt++;

        return(0);
}

Static void
cue_start(struct ifnet *ifp)
{
        struct cue_softc        *sc;
        struct mbuf             *m_head = NULL;

        sc = ifp->if_softc;
        CUE_LOCK(sc);

        if (ifp->if_flags & IFF_OACTIVE) {
                CUE_UNLOCK(sc);
                return;
        }

        m_head = ifq_poll(&ifp->if_snd);
        if (m_head == NULL) {
                CUE_UNLOCK(sc);
                return;
        }

        if (cue_encap(sc, m_head, 0)) {
                ifp->if_flags |= IFF_OACTIVE;
                CUE_UNLOCK(sc);
                return;
        }
        m_head = ifq_dequeue(&ifp->if_snd);

        /*
         * If there's a BPF listener, bounce a copy of this frame
         * to him.
         */
        BPF_MTAP(ifp, m_head);

        ifp->if_flags |= IFF_OACTIVE;

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

        return;
}

Static void
cue_init(void *xsc)
{
        struct cue_softc        *sc = xsc;
        struct ifnet            *ifp = &sc->arpcom.ac_if;
        struct cue_chain        *c;
        usbd_status             err;
        int                     i;

        if (ifp->if_flags & IFF_RUNNING)
                return;

        CUE_LOCK(sc);

        /*
         * Cancel pending I/O and free all RX/TX buffers.
         */
#ifdef foo
        cue_reset(sc);
#endif

        /* Set MAC address */
        for (i = 0; i < ETHER_ADDR_LEN; i++)
                cue_csr_write_1(sc, CUE_PAR0 - i, sc->arpcom.ac_enaddr[i]);

        /* Enable RX logic. */
        cue_csr_write_1(sc, CUE_ETHCTL, CUE_ETHCTL_RX_ON|CUE_ETHCTL_MCAST_ON);

         /* If we want promiscuous mode, set the allframes bit. */
        if (ifp->if_flags & IFF_PROMISC) {
                CUE_SETBIT(sc, CUE_ETHCTL, CUE_ETHCTL_PROMISC);
        } else {
                CUE_CLRBIT(sc, CUE_ETHCTL, CUE_ETHCTL_PROMISC);
        }

        /* Init TX ring. */
        if (cue_tx_list_init(sc) == ENOBUFS) {
                if_printf(ifp, "tx list init failed\n");
                CUE_UNLOCK(sc);
                return;
        }

        /* Init RX ring. */
        if (cue_rx_list_init(sc) == ENOBUFS) {
                if_printf(ifp, "rx list init failed\n");
                CUE_UNLOCK(sc);
                return;
        }

        /* Load the multicast filter. */
        cue_setmulti(sc);

        /*
         * Set the number of RX and TX buffers that we want
         * to reserve inside the ASIC.
         */
        cue_csr_write_1(sc, CUE_RX_BUFPKTS, CUE_RX_FRAMES);
        cue_csr_write_1(sc, CUE_TX_BUFPKTS, CUE_TX_FRAMES);

        /* Set advanced operation modes. */
        cue_csr_write_1(sc, CUE_ADVANCED_OPMODES,
            CUE_AOP_EMBED_RXLEN|0x01); /* 1 wait state */

        /* Program the LED operation. */
        cue_csr_write_1(sc, CUE_LEDCTL, CUE_LEDCTL_FOLLOW_LINK);

        /* Open RX and TX pipes. */
        err = usbd_open_pipe(sc->cue_iface, sc->cue_ed[CUE_ENDPT_RX],
            USBD_EXCLUSIVE_USE, &sc->cue_ep[CUE_ENDPT_RX]);
        if (err) {
                if_printf(ifp, "open rx pipe failed: %s\n", usbd_errstr(err));
                CUE_UNLOCK(sc);
                return;
        }
        err = usbd_open_pipe(sc->cue_iface, sc->cue_ed[CUE_ENDPT_TX],
            USBD_EXCLUSIVE_USE, &sc->cue_ep[CUE_ENDPT_TX]);
        if (err) {
                if_printf(ifp, "open tx pipe failed: %s\n", usbd_errstr(err));
                CUE_UNLOCK(sc);
                return;
        }

        /* Start up the receive pipe. */
        for (i = 0; i < CUE_RX_LIST_CNT; i++) {
                c = &sc->cue_cdata.cue_rx_chain[i];
                usbd_setup_xfer(c->cue_xfer, sc->cue_ep[CUE_ENDPT_RX],
                    c, mtod(c->cue_mbuf, char *), CUE_BUFSZ,
                    USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, cue_rxeof);
                usbd_transfer(c->cue_xfer);
        }

        ifp->if_flags |= IFF_RUNNING;
        ifp->if_flags &= ~IFF_OACTIVE;

        CUE_UNLOCK(sc);

        callout_reset(&sc->cue_stat_timer, hz, cue_tick, sc);
}

Static int
cue_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
{
        struct cue_softc        *sc = ifp->if_softc;
        int                     error = 0;

        CUE_LOCK(sc);

        switch(command) {
        case SIOCSIFFLAGS:
                if (ifp->if_flags & IFF_UP) {
                        if (ifp->if_flags & IFF_RUNNING &&
                            ifp->if_flags & IFF_PROMISC &&
                            !(sc->cue_if_flags & IFF_PROMISC)) {
                                CUE_SETBIT(sc, CUE_ETHCTL, CUE_ETHCTL_PROMISC);
                                cue_setmulti(sc);
                        } else if (ifp->if_flags & IFF_RUNNING &&
                            !(ifp->if_flags & IFF_PROMISC) &&
                            sc->cue_if_flags & IFF_PROMISC) {
                                CUE_CLRBIT(sc, CUE_ETHCTL, CUE_ETHCTL_PROMISC);
                                cue_setmulti(sc);
                        } else if (!(ifp->if_flags & IFF_RUNNING))
                                cue_init(sc);
                } else {
                        if (ifp->if_flags & IFF_RUNNING)
                                cue_stop(sc);
                }
                sc->cue_if_flags = ifp->if_flags;
                error = 0;
                break;
        case SIOCADDMULTI:
        case SIOCDELMULTI:
                cue_setmulti(sc);
                error = 0;
                break;
        default:
                error = ether_ioctl(ifp, command, data);
                break;
        }

        CUE_UNLOCK(sc);

        return(error);
}

Static void
cue_watchdog(struct ifnet *ifp)
{
        struct cue_softc        *sc;
        struct cue_chain        *c;
        usbd_status             stat;

        sc = ifp->if_softc;
        CUE_LOCK(sc);

        ifp->if_oerrors++;
        if_printf(ifp, "watchdog timeout\n");

        c = &sc->cue_cdata.cue_tx_chain[0];
        usbd_get_xfer_status(c->cue_xfer, NULL, NULL, NULL, &stat);
        cue_txeof(c->cue_xfer, c, stat);

        if (!ifq_is_empty(&ifp->if_snd))
                cue_start(ifp);
        CUE_UNLOCK(sc);

        return;
}

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

        CUE_LOCK(sc);

        ifp = &sc->arpcom.ac_if;
        ifp->if_timer = 0;

        cue_csr_write_1(sc, CUE_ETHCTL, 0);
        cue_reset(sc);
        callout_stop(&sc->cue_stat_timer);

        /* Stop transfers. */
        if (sc->cue_ep[CUE_ENDPT_RX] != NULL) {
                err = usbd_abort_pipe(sc->cue_ep[CUE_ENDPT_RX]);
                if (err) {
                        if_printf(ifp, "abort rx pipe failed: %s\n",
                                  usbd_errstr(err));
                }
                err = usbd_close_pipe(sc->cue_ep[CUE_ENDPT_RX]);
                if (err) {
                        if_printf(ifp, "close rx pipe failed: %s\n",
                                  usbd_errstr(err));
                }
                sc->cue_ep[CUE_ENDPT_RX] = NULL;
        }

        if (sc->cue_ep[CUE_ENDPT_TX] != NULL) {
                err = usbd_abort_pipe(sc->cue_ep[CUE_ENDPT_TX]);
                if (err) {
                        if_printf(ifp, "abort tx pipe failed: %s\n",
                                  usbd_errstr(err));
                }
                err = usbd_close_pipe(sc->cue_ep[CUE_ENDPT_TX]);
                if (err) {
                        if_printf(ifp, "close tx pipe failed: %s\n",
                                  usbd_errstr(err));
                }
                sc->cue_ep[CUE_ENDPT_TX] = NULL;
        }

        if (sc->cue_ep[CUE_ENDPT_INTR] != NULL) {
                err = usbd_abort_pipe(sc->cue_ep[CUE_ENDPT_INTR]);
                if (err) {
                        if_printf(ifp, "abort intr pipe failed: %s\n",
                                  usbd_errstr(err));
                }
                err = usbd_close_pipe(sc->cue_ep[CUE_ENDPT_INTR]);
                if (err) {
                        if_printf(ifp, "close intr pipe failed: %s\n",
                                  usbd_errstr(err));
                }
                sc->cue_ep[CUE_ENDPT_INTR] = NULL;
        }

        /* Free RX resources. */
        for (i = 0; i < CUE_RX_LIST_CNT; i++) {
                if (sc->cue_cdata.cue_rx_chain[i].cue_buf != NULL) {
                        free(sc->cue_cdata.cue_rx_chain[i].cue_buf, M_USBDEV);
                        sc->cue_cdata.cue_rx_chain[i].cue_buf = NULL;
                }
                if (sc->cue_cdata.cue_rx_chain[i].cue_mbuf != NULL) {
                        m_freem(sc->cue_cdata.cue_rx_chain[i].cue_mbuf);
                        sc->cue_cdata.cue_rx_chain[i].cue_mbuf = NULL;
                }
                if (sc->cue_cdata.cue_rx_chain[i].cue_xfer != NULL) {
                        usbd_free_xfer(sc->cue_cdata.cue_rx_chain[i].cue_xfer);
                        sc->cue_cdata.cue_rx_chain[i].cue_xfer = NULL;
                }
        }

        /* Free TX resources. */
        for (i = 0; i < CUE_TX_LIST_CNT; i++) {
                if (sc->cue_cdata.cue_tx_chain[i].cue_buf != NULL) {
                        free(sc->cue_cdata.cue_tx_chain[i].cue_buf, M_USBDEV);
                        sc->cue_cdata.cue_tx_chain[i].cue_buf = NULL;
                }
                if (sc->cue_cdata.cue_tx_chain[i].cue_mbuf != NULL) {
                        m_freem(sc->cue_cdata.cue_tx_chain[i].cue_mbuf);
                        sc->cue_cdata.cue_tx_chain[i].cue_mbuf = NULL;
                }
                if (sc->cue_cdata.cue_tx_chain[i].cue_xfer != NULL) {
                        usbd_free_xfer(sc->cue_cdata.cue_tx_chain[i].cue_xfer);
                        sc->cue_cdata.cue_tx_chain[i].cue_xfer = NULL;
                }
        }

        ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
        CUE_UNLOCK(sc);

        return;
}

/*
 * Stop all chip I/O so that the kernel's probe routines don't
 * get confused by errant DMAs when rebooting.
 */
Static void
cue_shutdown(device_ptr_t dev)
{
        struct cue_softc        *sc;

        sc = device_get_softc(dev);

        CUE_LOCK(sc);
        cue_reset(sc);
        cue_stop(sc);
        CUE_UNLOCK(sc);

        return;
}