if_aue.c

Go to the documentation of this file.

/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright (c) 1997, 1998, 1999, 2000
 *      Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
 *
 * Copyright (c) 2006
 *      Alfred Perlstein <alfred@FreeBSD.org>. 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.
 */
 
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
 
/*
 * ADMtek AN986 Pegasus and AN8511 Pegasus II USB to ethernet driver.
 * Datasheet is available from http://www.admtek.com.tw.
 *
 * Written by Bill Paul <wpaul@ee.columbia.edu>
 * Electrical Engineering Department
 * Columbia University, New York City
 *
 * SMP locking by Alfred Perlstein <alfred@FreeBSD.org>.
 * RED Inc.
 */
 
/*
 * The Pegasus chip uses four USB "endpoints" to provide 10/100 ethernet
 * support: the control endpoint for reading/writing registers, burst
 * read endpoint for packet reception, burst write for packet transmission
 * and one for "interrupts." The chip uses the same RX filter scheme
 * as the other ADMtek ethernet parts: one perfect filter entry for the
 * the station address and a 64-bit multicast hash table. The chip supports
 * both MII and HomePNA attachments.
 *
 * Since the maximum data transfer speed of USB is supposed to be 12Mbps,
 * you're never really going to get 100Mbps speeds from this device. I
 * think the idea is to allow the device to connect to 10 or 100Mbps
 * networks, not necessarily to provide 100Mbps performance. Also, since
 * the controller uses an external PHY chip, it's possible that board
 * designers might simply choose a 10Mbps PHY.
 *
 * Registers are accessed using uether_do_request(). Packet
 * transfers are done using usbd_transfer() and friends.
 */
 
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
 
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_media.h>
 
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
 
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include "usbdevs.h"
 
#define USB_DEBUG_VAR aue_debug
#include <dev/usb/usb_debug.h>
#include <dev/usb/usb_process.h>
 
#include <dev/usb/net/usb_ethernet.h>
#include <dev/usb/net/if_auereg.h>
 
#include "miibus_if.h"
 
#ifdef USB_DEBUG
static int aue_debug = 0;
 
static SYSCTL_NODE(_hw_usb, OID_AUTO, aue, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
    "USB aue");
SYSCTL_INT(_hw_usb_aue, OID_AUTO, debug, CTLFLAG_RWTUN, &aue_debug, 0,
    "Debug level");
#endif
 
/*
 * Various supported device vendors/products.
 */
static const STRUCT_USB_HOST_ID aue_devs[] = {
#define AUE_DEV(v,p,i) { USB_VPI(USB_VENDOR_##v, USB_PRODUCT_##v##_##p, i) }
    AUE_DEV(3COM, 3C460B, AUE_FLAG_PII),
    AUE_DEV(ABOCOM, DSB650TX_PNA, 0),
    AUE_DEV(ABOCOM, UFE1000, AUE_FLAG_LSYS),
    AUE_DEV(ABOCOM, XX10, 0),
    AUE_DEV(ABOCOM, XX1, AUE_FLAG_PNA | AUE_FLAG_PII),
    AUE_DEV(ABOCOM, XX2, AUE_FLAG_PII),
    AUE_DEV(ABOCOM, XX4, AUE_FLAG_PNA),
    AUE_DEV(ABOCOM, XX5, AUE_FLAG_PNA),
    AUE_DEV(ABOCOM, XX6, AUE_FLAG_PII),
    AUE_DEV(ABOCOM, XX7, AUE_FLAG_PII),
    AUE_DEV(ABOCOM, XX8, AUE_FLAG_PII),
    AUE_DEV(ABOCOM, XX9, AUE_FLAG_PNA),
    AUE_DEV(ACCTON, SS1001, AUE_FLAG_PII),
    AUE_DEV(ACCTON, USB320_EC, 0),
    AUE_DEV(ADMTEK, PEGASUSII_2, AUE_FLAG_PII),
    AUE_DEV(ADMTEK, PEGASUSII_3, AUE_FLAG_PII),
    AUE_DEV(ADMTEK, PEGASUSII_4, AUE_FLAG_PII),
    AUE_DEV(ADMTEK, PEGASUSII, AUE_FLAG_PII),
    AUE_DEV(ADMTEK, PEGASUS, AUE_FLAG_PNA | AUE_FLAG_DUAL_PHY),
    AUE_DEV(AEI, FASTETHERNET, AUE_FLAG_PII),
    AUE_DEV(ALLIEDTELESYN, ATUSB100, AUE_FLAG_PII),
    AUE_DEV(ATEN, UC110T, AUE_FLAG_PII),
    AUE_DEV(BELKIN, USB2LAN, AUE_FLAG_PII),
    AUE_DEV(BILLIONTON, USB100, 0),
    AUE_DEV(BILLIONTON, USBE100, AUE_FLAG_PII),
    AUE_DEV(BILLIONTON, USBEL100, 0),
    AUE_DEV(BILLIONTON, USBLP100, AUE_FLAG_PNA),
    AUE_DEV(COREGA, FETHER_USB_TXS, AUE_FLAG_PII),
    AUE_DEV(COREGA, FETHER_USB_TX, 0),
    AUE_DEV(DLINK, DSB650TX1, AUE_FLAG_LSYS),
    AUE_DEV(DLINK, DSB650TX2, AUE_FLAG_LSYS | AUE_FLAG_PII),
    AUE_DEV(DLINK, DSB650TX3, AUE_FLAG_LSYS | AUE_FLAG_PII),
    AUE_DEV(DLINK, DSB650TX4, AUE_FLAG_LSYS | AUE_FLAG_PII),
    AUE_DEV(DLINK, DSB650TX_PNA, AUE_FLAG_PNA),
    AUE_DEV(DLINK, DSB650TX, AUE_FLAG_LSYS),
    AUE_DEV(DLINK, DSB650, AUE_FLAG_LSYS),
    AUE_DEV(ELCON, PLAN, AUE_FLAG_PNA | AUE_FLAG_PII),
    AUE_DEV(ELECOM, LDUSB20, AUE_FLAG_PII),
    AUE_DEV(ELECOM, LDUSBLTX, AUE_FLAG_PII),
    AUE_DEV(ELECOM, LDUSBTX0, 0),
    AUE_DEV(ELECOM, LDUSBTX1, AUE_FLAG_LSYS),
    AUE_DEV(ELECOM, LDUSBTX2, 0),
    AUE_DEV(ELECOM, LDUSBTX3, AUE_FLAG_LSYS),
    AUE_DEV(ELSA, USB2ETHERNET, 0),
    AUE_DEV(GIGABYTE, GNBR402W, 0),
    AUE_DEV(HAWKING, UF100, AUE_FLAG_PII),
    AUE_DEV(HP, HN210E, AUE_FLAG_PII),
    AUE_DEV(IODATA, USBETTXS, AUE_FLAG_PII),
    AUE_DEV(IODATA, USBETTX, 0),
    AUE_DEV(KINGSTON, KNU101TX, 0),
    AUE_DEV(LINKSYS, USB100H1, AUE_FLAG_LSYS | AUE_FLAG_PNA),
    AUE_DEV(LINKSYS, USB100TX, AUE_FLAG_LSYS),
    AUE_DEV(LINKSYS, USB10TA, AUE_FLAG_LSYS),
    AUE_DEV(LINKSYS, USB10TX1, AUE_FLAG_LSYS | AUE_FLAG_PII),
    AUE_DEV(LINKSYS, USB10TX2, AUE_FLAG_LSYS | AUE_FLAG_PII),
    AUE_DEV(LINKSYS, USB10T, AUE_FLAG_LSYS),
    AUE_DEV(MELCO, LUA2TX5, AUE_FLAG_PII),
    AUE_DEV(MELCO, LUATX1, 0),
    AUE_DEV(MELCO, LUATX5, 0),
    AUE_DEV(MICROSOFT, MN110, AUE_FLAG_PII),
    AUE_DEV(NETGEAR, FA101, AUE_FLAG_PII),
    AUE_DEV(SIEMENS, SPEEDSTREAM, AUE_FLAG_PII),
    AUE_DEV(SIIG2, USBTOETHER, AUE_FLAG_PII),
    AUE_DEV(SMARTBRIDGES, SMARTNIC, AUE_FLAG_PII),
    AUE_DEV(SMC, 2202USB, 0),
    AUE_DEV(SMC, 2206USB, AUE_FLAG_PII),
    AUE_DEV(SOHOWARE, NUB100, 0),
    AUE_DEV(SOHOWARE, NUB110, AUE_FLAG_PII),
#undef AUE_DEV
};
 
/* prototypes */
 
static device_probe_t aue_probe;
static device_attach_t aue_attach;
static device_detach_t aue_detach;
static miibus_readreg_t aue_miibus_readreg;
static miibus_writereg_t aue_miibus_writereg;
static miibus_statchg_t aue_miibus_statchg;
 
static usb_callback_t aue_intr_callback;
static usb_callback_t aue_bulk_read_callback;
static usb_callback_t aue_bulk_write_callback;
 
static uether_fn_t aue_attach_post;
static uether_fn_t aue_init;
static uether_fn_t aue_stop;
static uether_fn_t aue_start;
static uether_fn_t aue_tick;
static uether_fn_t aue_setmulti;
static uether_fn_t aue_setpromisc;
 
static uint8_t  aue_csr_read_1(struct aue_softc *, uint16_t);
static uint16_t aue_csr_read_2(struct aue_softc *, uint16_t);
static void     aue_csr_write_1(struct aue_softc *, uint16_t, uint8_t);
static void     aue_csr_write_2(struct aue_softc *, uint16_t, uint16_t);
static uint16_t aue_eeprom_getword(struct aue_softc *, int);
static void     aue_reset(struct aue_softc *);
static void     aue_reset_pegasus_II(struct aue_softc *);
 
static int      aue_ifmedia_upd(struct ifnet *);
static void     aue_ifmedia_sts(struct ifnet *, struct ifmediareq *);
 
static const struct usb_config aue_config[AUE_N_TRANSFER] = {
        [AUE_BULK_DT_WR] = {
                .type = UE_BULK,
                .endpoint = UE_ADDR_ANY,
                .direction = UE_DIR_OUT,
                .bufsize = (MCLBYTES + 2),
                .flags = {.pipe_bof = 1,.force_short_xfer = 1,},
                .callback = aue_bulk_write_callback,
                .timeout = 10000,       /* 10 seconds */
        },
 
        [AUE_BULK_DT_RD] = {
                .type = UE_BULK,
                .endpoint = UE_ADDR_ANY,
                .direction = UE_DIR_IN,
                .bufsize = (MCLBYTES + 4 + ETHER_CRC_LEN),
                .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
                .callback = aue_bulk_read_callback,
        },
 
        [AUE_INTR_DT_RD] = {
                .type = UE_INTERRUPT,
                .endpoint = UE_ADDR_ANY,
                .direction = UE_DIR_IN,
                .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
                .bufsize = 0,   /* use wMaxPacketSize */
                .callback = aue_intr_callback,
        },
};
 
static device_method_t aue_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe, aue_probe),
        DEVMETHOD(device_attach, aue_attach),
        DEVMETHOD(device_detach, aue_detach),
 
        /* MII interface */
        DEVMETHOD(miibus_readreg, aue_miibus_readreg),
        DEVMETHOD(miibus_writereg, aue_miibus_writereg),
        DEVMETHOD(miibus_statchg, aue_miibus_statchg),
 
        DEVMETHOD_END
};
 
static driver_t aue_driver = {
        .name = "aue",
        .methods = aue_methods,
        .size = sizeof(struct aue_softc)
};
 
static devclass_t aue_devclass;
 
DRIVER_MODULE(aue, uhub, aue_driver, aue_devclass, NULL, 0);
DRIVER_MODULE(miibus, aue, miibus_driver, miibus_devclass, 0, 0);
MODULE_DEPEND(aue, uether, 1, 1, 1);
MODULE_DEPEND(aue, usb, 1, 1, 1);
MODULE_DEPEND(aue, ether, 1, 1, 1);
MODULE_DEPEND(aue, miibus, 1, 1, 1);
MODULE_VERSION(aue, 1);
USB_PNP_HOST_INFO(aue_devs);
 
static const struct usb_ether_methods aue_ue_methods = {
        .ue_attach_post = aue_attach_post,
        .ue_start = aue_start,
        .ue_init = aue_init,
        .ue_stop = aue_stop,
        .ue_tick = aue_tick,
        .ue_setmulti = aue_setmulti,
        .ue_setpromisc = aue_setpromisc,
        .ue_mii_upd = aue_ifmedia_upd,
        .ue_mii_sts = aue_ifmedia_sts,
};
 
#define AUE_SETBIT(sc, reg, x) \
        aue_csr_write_1(sc, reg, aue_csr_read_1(sc, reg) | (x))
 
#define AUE_CLRBIT(sc, reg, x) \
        aue_csr_write_1(sc, reg, aue_csr_read_1(sc, reg) & ~(x))
 
static uint8_t
aue_csr_read_1(struct aue_softc *sc, uint16_t reg)
{
        struct usb_device_request req;
        usb_error_t err;
        uint8_t val;
 
        req.bmRequestType = UT_READ_VENDOR_DEVICE;
        req.bRequest = AUE_UR_READREG;
        USETW(req.wValue, 0);
        USETW(req.wIndex, reg);
        USETW(req.wLength, 1);
 
        err = uether_do_request(&sc->sc_ue, &req, &val, 1000);
        if (err)
                return (0);
        return (val);
}
 
static uint16_t
aue_csr_read_2(struct aue_softc *sc, uint16_t reg)
{
        struct usb_device_request req;
        usb_error_t err;
        uint16_t val;
 
        req.bmRequestType = UT_READ_VENDOR_DEVICE;
        req.bRequest = AUE_UR_READREG;
        USETW(req.wValue, 0);
        USETW(req.wIndex, reg);
        USETW(req.wLength, 2);
 
        err = uether_do_request(&sc->sc_ue, &req, &val, 1000);
        if (err)
                return (0);
        return (le16toh(val));
}
 
static void
aue_csr_write_1(struct aue_softc *sc, uint16_t reg, uint8_t val)
{
        struct usb_device_request req;
 
        req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        req.bRequest = AUE_UR_WRITEREG;
        req.wValue[0] = val;
        req.wValue[1] = 0;
        USETW(req.wIndex, reg);
        USETW(req.wLength, 1);
 
        if (uether_do_request(&sc->sc_ue, &req, &val, 1000)) {
                /* error ignored */
        }
}
 
static void
aue_csr_write_2(struct aue_softc *sc, uint16_t reg, uint16_t val)
{
        struct usb_device_request req;
 
        req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        req.bRequest = AUE_UR_WRITEREG;
        USETW(req.wValue, val);
        USETW(req.wIndex, reg);
        USETW(req.wLength, 2);
 
        val = htole16(val);
 
        if (uether_do_request(&sc->sc_ue, &req, &val, 1000)) {
                /* error ignored */
        }
}
 
/*
 * Read a word of data stored in the EEPROM at address 'addr.'
 */
static uint16_t
aue_eeprom_getword(struct aue_softc *sc, int addr)
{
        int i;
 
        aue_csr_write_1(sc, AUE_EE_REG, addr);
        aue_csr_write_1(sc, AUE_EE_CTL, AUE_EECTL_READ);
 
        for (i = 0; i != AUE_TIMEOUT; i++) {
                if (aue_csr_read_1(sc, AUE_EE_CTL) & AUE_EECTL_DONE)
                        break;
                if (uether_pause(&sc->sc_ue, hz / 100))
                        break;
        }
 
        if (i == AUE_TIMEOUT)
                device_printf(sc->sc_ue.ue_dev, "EEPROM read timed out\n");
 
        return (aue_csr_read_2(sc, AUE_EE_DATA));
}
 
/*
 * Read station address(offset 0) from the EEPROM.
 */
static void
aue_read_mac(struct aue_softc *sc, uint8_t *eaddr)
{
        int i, offset;
        uint16_t word;
 
        for (i = 0, offset = 0; i < ETHER_ADDR_LEN / 2; i++) {
                word = aue_eeprom_getword(sc, offset + i);
                eaddr[i * 2] = (uint8_t)word;
                eaddr[i * 2 + 1] = (uint8_t)(word >> 8);
        }
}
 
static int
aue_miibus_readreg(device_t dev, int phy, int reg)
{
        struct aue_softc *sc = device_get_softc(dev);
        int i, locked;
        uint16_t val = 0;
 
        locked = mtx_owned(&sc->sc_mtx);
        if (!locked)
                AUE_LOCK(sc);
 
        /*
         * The Am79C901 HomePNA PHY actually contains two transceivers: a 1Mbps
         * HomePNA PHY and a 10Mbps full/half duplex ethernet PHY with NWAY
         * autoneg. However in the ADMtek adapter, only the 1Mbps PHY is
         * actually connected to anything, so we ignore the 10Mbps one. It
         * happens to be configured for MII address 3, so we filter that out.
         */
        if (sc->sc_flags & AUE_FLAG_DUAL_PHY) {
                if (phy == 3)
                        goto done;
#if 0
                if (phy != 1)
                        goto done;
#endif
        }
        aue_csr_write_1(sc, AUE_PHY_ADDR, phy);
        aue_csr_write_1(sc, AUE_PHY_CTL, reg | AUE_PHYCTL_READ);
 
        for (i = 0; i != AUE_TIMEOUT; i++) {
                if (aue_csr_read_1(sc, AUE_PHY_CTL) & AUE_PHYCTL_DONE)
                        break;
                if (uether_pause(&sc->sc_ue, hz / 100))
                        break;
        }
 
        if (i == AUE_TIMEOUT)
                device_printf(sc->sc_ue.ue_dev, "MII read timed out\n");
 
        val = aue_csr_read_2(sc, AUE_PHY_DATA);
 
done:
        if (!locked)
                AUE_UNLOCK(sc);
        return (val);
}
 
static int
aue_miibus_writereg(device_t dev, int phy, int reg, int data)
{
        struct aue_softc *sc = device_get_softc(dev);
        int i;
        int locked;
 
        if (phy == 3)
                return (0);
 
        locked = mtx_owned(&sc->sc_mtx);
        if (!locked)
                AUE_LOCK(sc);
 
        aue_csr_write_2(sc, AUE_PHY_DATA, data);
        aue_csr_write_1(sc, AUE_PHY_ADDR, phy);
        aue_csr_write_1(sc, AUE_PHY_CTL, reg | AUE_PHYCTL_WRITE);
 
        for (i = 0; i != AUE_TIMEOUT; i++) {
                if (aue_csr_read_1(sc, AUE_PHY_CTL) & AUE_PHYCTL_DONE)
                        break;
                if (uether_pause(&sc->sc_ue, hz / 100))
                        break;
        }
 
        if (i == AUE_TIMEOUT)
                device_printf(sc->sc_ue.ue_dev, "MII write timed out\n");
 
        if (!locked)
                AUE_UNLOCK(sc);
        return (0);
}
 
static void
aue_miibus_statchg(device_t dev)
{
        struct aue_softc *sc = device_get_softc(dev);
        struct mii_data *mii = GET_MII(sc);
        int locked;
 
        locked = mtx_owned(&sc->sc_mtx);
        if (!locked)
                AUE_LOCK(sc);
 
        AUE_CLRBIT(sc, AUE_CTL0, AUE_CTL0_RX_ENB | AUE_CTL0_TX_ENB);
        if (IFM_SUBTYPE(mii->mii_media_active) == IFM_100_TX)
                AUE_SETBIT(sc, AUE_CTL1, AUE_CTL1_SPEEDSEL);
        else
                AUE_CLRBIT(sc, AUE_CTL1, AUE_CTL1_SPEEDSEL);
 
        if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX)
                AUE_SETBIT(sc, AUE_CTL1, AUE_CTL1_DUPLEX);
        else
                AUE_CLRBIT(sc, AUE_CTL1, AUE_CTL1_DUPLEX);
 
        AUE_SETBIT(sc, AUE_CTL0, AUE_CTL0_RX_ENB | AUE_CTL0_TX_ENB);
 
        /*
         * Set the LED modes on the LinkSys adapter.
         * This turns on the 'dual link LED' bin in the auxmode
         * register of the Broadcom PHY.
         */
        if (sc->sc_flags & AUE_FLAG_LSYS) {
                uint16_t auxmode;
 
                auxmode = aue_miibus_readreg(dev, 0, 0x1b);
                aue_miibus_writereg(dev, 0, 0x1b, auxmode | 0x04);
        }
        if (!locked)
                AUE_UNLOCK(sc);
}
 
#define AUE_BITS        6
static u_int
aue_hash_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt)
{
        uint8_t *hashtbl = arg;
        uint32_t h;
 
        h = ether_crc32_le(LLADDR(sdl), ETHER_ADDR_LEN) & ((1 << AUE_BITS) - 1);
        hashtbl[(h >> 3)] |=  1 << (h & 0x7);
 
        return (1);
}
 
static void
aue_setmulti(struct usb_ether *ue)
{
        struct aue_softc *sc = uether_getsc(ue);
        struct ifnet *ifp = uether_getifp(ue);
        uint32_t i;
        uint8_t hashtbl[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
 
        AUE_LOCK_ASSERT(sc, MA_OWNED);
 
        if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
                AUE_SETBIT(sc, AUE_CTL0, AUE_CTL0_ALLMULTI);
                return;
        }
 
        AUE_CLRBIT(sc, AUE_CTL0, AUE_CTL0_ALLMULTI);
 
        /* now program new ones */
        if_foreach_llmaddr(ifp, aue_hash_maddr, hashtbl);
 
        /* write the hashtable */
        for (i = 0; i != 8; i++)
                aue_csr_write_1(sc, AUE_MAR0 + i, hashtbl[i]);
}
 
static void
aue_reset_pegasus_II(struct aue_softc *sc)
{
        /* Magic constants taken from Linux driver. */
        aue_csr_write_1(sc, AUE_REG_1D, 0);
        aue_csr_write_1(sc, AUE_REG_7B, 2);
#if 0
        if ((sc->sc_flags & HAS_HOME_PNA) && mii_mode)
                aue_csr_write_1(sc, AUE_REG_81, 6);
        else
#endif
                aue_csr_write_1(sc, AUE_REG_81, 2);
}
 
static void
aue_reset(struct aue_softc *sc)
{
        int i;
 
        AUE_SETBIT(sc, AUE_CTL1, AUE_CTL1_RESETMAC);
 
        for (i = 0; i != AUE_TIMEOUT; i++) {
                if (!(aue_csr_read_1(sc, AUE_CTL1) & AUE_CTL1_RESETMAC))
                        break;
                if (uether_pause(&sc->sc_ue, hz / 100))
                        break;
        }
 
        if (i == AUE_TIMEOUT)
                device_printf(sc->sc_ue.ue_dev, "reset failed\n");
 
        /*
         * The PHY(s) attached to the Pegasus chip may be held
         * in reset until we flip on the GPIO outputs. Make sure
         * to set the GPIO pins high so that the PHY(s) will
         * be enabled.
         *
         * NOTE: We used to force all of the GPIO pins low first and then
         * enable the ones we want. This has been changed to better
         * match the ADMtek's reference design to avoid setting the
         * power-down configuration line of the PHY at the same time
         * it is reset.
         */
        aue_csr_write_1(sc, AUE_GPIO0, AUE_GPIO_SEL0|AUE_GPIO_SEL1);
        aue_csr_write_1(sc, AUE_GPIO0, AUE_GPIO_SEL0|AUE_GPIO_SEL1|AUE_GPIO_OUT0);
 
        if (sc->sc_flags & AUE_FLAG_LSYS) {
                /* Grrr. LinkSys has to be different from everyone else. */
                aue_csr_write_1(sc, AUE_GPIO0, AUE_GPIO_SEL0|AUE_GPIO_SEL1);
                aue_csr_write_1(sc, AUE_GPIO0,
                    AUE_GPIO_SEL0|AUE_GPIO_SEL1|AUE_GPIO_OUT0);
        }
        if (sc->sc_flags & AUE_FLAG_PII)
                aue_reset_pegasus_II(sc);
 
        /* Wait a little while for the chip to get its brains in order: */
        uether_pause(&sc->sc_ue, hz / 100);
}
 
static void
aue_attach_post(struct usb_ether *ue)
{
        struct aue_softc *sc = uether_getsc(ue);
 
        /* reset the adapter */
        aue_reset(sc);
 
        /* get station address from the EEPROM */
        aue_read_mac(sc, ue->ue_eaddr);
}
 
/*
 * Probe for a Pegasus chip.
 */
static int
aue_probe(device_t dev)
{
        struct usb_attach_arg *uaa = device_get_ivars(dev);
 
        if (uaa->usb_mode != USB_MODE_HOST)
                return (ENXIO);
        if (uaa->info.bConfigIndex != AUE_CONFIG_INDEX)
                return (ENXIO);
        if (uaa->info.bIfaceIndex != AUE_IFACE_IDX)
                return (ENXIO);
        /*
         * Belkin USB Bluetooth dongles of the F8T012xx1 model series conflict
         * with older Belkin USB2LAN adapters.  Skip if_aue if we detect one of
         * the devices that look like Bluetooth adapters.
         */
        if (uaa->info.idVendor == USB_VENDOR_BELKIN &&
            uaa->info.idProduct == USB_PRODUCT_BELKIN_F8T012 &&
            uaa->info.bcdDevice == 0x0413)
                return (ENXIO);
 
        return (usbd_lookup_id_by_uaa(aue_devs, sizeof(aue_devs), uaa));
}
 
/*
 * Attach the interface. Allocate softc structures, do ifmedia
 * setup and ethernet/BPF attach.
 */
static int
aue_attach(device_t dev)
{
        struct usb_attach_arg *uaa = device_get_ivars(dev);
        struct aue_softc *sc = device_get_softc(dev);
        struct usb_ether *ue = &sc->sc_ue;
        uint8_t iface_index;
        int error;
 
        sc->sc_flags = USB_GET_DRIVER_INFO(uaa);
 
        if (uaa->info.bcdDevice >= 0x0201) {
                /* XXX currently undocumented */
                sc->sc_flags |= AUE_FLAG_VER_2;
        }
 
        device_set_usb_desc(dev);
        mtx_init(&sc->sc_mtx, device_get_nameunit(dev), NULL, MTX_DEF);
 
        iface_index = AUE_IFACE_IDX;
        error = usbd_transfer_setup(uaa->device, &iface_index,
            sc->sc_xfer, aue_config, AUE_N_TRANSFER,
            sc, &sc->sc_mtx);
        if (error) {
                device_printf(dev, "allocating USB transfers failed\n");
                goto detach;
        }
 
        ue->ue_sc = sc;
        ue->ue_dev = dev;
        ue->ue_udev = uaa->device;
        ue->ue_mtx = &sc->sc_mtx;
        ue->ue_methods = &aue_ue_methods;
 
        error = uether_ifattach(ue);
        if (error) {
                device_printf(dev, "could not attach interface\n");
                goto detach;
        }
        return (0);                     /* success */
 
detach:
        aue_detach(dev);
        return (ENXIO);                 /* failure */
}
 
static int
aue_detach(device_t dev)
{
        struct aue_softc *sc = device_get_softc(dev);
        struct usb_ether *ue = &sc->sc_ue;
 
        usbd_transfer_unsetup(sc->sc_xfer, AUE_N_TRANSFER);
        uether_ifdetach(ue);
        mtx_destroy(&sc->sc_mtx);
 
        return (0);
}
 
static void
aue_intr_callback(struct usb_xfer *xfer, usb_error_t error)
{
        struct aue_softc *sc = usbd_xfer_softc(xfer);
        struct ifnet *ifp = uether_getifp(&sc->sc_ue);
        struct aue_intrpkt pkt;
        struct usb_page_cache *pc;
        int actlen;
 
        usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
 
        switch (USB_GET_STATE(xfer)) {
        case USB_ST_TRANSFERRED:
 
                if ((ifp->if_drv_flags & IFF_DRV_RUNNING) &&
                    actlen >= (int)sizeof(pkt)) {
                        pc = usbd_xfer_get_frame(xfer, 0);
                        usbd_copy_out(pc, 0, &pkt, sizeof(pkt));
 
                        if (pkt.aue_txstat0)
                                if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
                        if (pkt.aue_txstat0 & (AUE_TXSTAT0_LATECOLL |
                            AUE_TXSTAT0_EXCESSCOLL))
                                if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 1);
                }
                /* FALLTHROUGH */
        case USB_ST_SETUP:
tr_setup:
                usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
                usbd_transfer_submit(xfer);
                return;
 
        default:                        /* Error */
                if (error != USB_ERR_CANCELLED) {
                        /* try to clear stall first */
                        usbd_xfer_set_stall(xfer);
                        goto tr_setup;
                }
                return;
        }
}
 
static void
aue_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error)
{
        struct aue_softc *sc = usbd_xfer_softc(xfer);
        struct usb_ether *ue = &sc->sc_ue;
        struct ifnet *ifp = uether_getifp(ue);
        struct aue_rxpkt stat;
        struct usb_page_cache *pc;
        int actlen;
 
        usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
        pc = usbd_xfer_get_frame(xfer, 0);
 
        switch (USB_GET_STATE(xfer)) {
        case USB_ST_TRANSFERRED:
                DPRINTFN(11, "received %d bytes\n", actlen);
 
                if (sc->sc_flags & AUE_FLAG_VER_2) {
                        if (actlen == 0) {
                                if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
                                goto tr_setup;
                        }
                } else {
                        if (actlen <= (int)(sizeof(stat) + ETHER_CRC_LEN)) {
                                if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
                                goto tr_setup;
                        }
                        usbd_copy_out(pc, actlen - sizeof(stat), &stat,
                            sizeof(stat));
 
                        /*
                         * turn off all the non-error bits in the rx status
                         * word:
                         */
                        stat.aue_rxstat &= AUE_RXSTAT_MASK;
                        if (stat.aue_rxstat) {
                                if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
                                goto tr_setup;
                        }
                        /* No errors; receive the packet. */
                        actlen -= (sizeof(stat) + ETHER_CRC_LEN);
                }
                uether_rxbuf(ue, pc, 0, actlen);
 
                /* FALLTHROUGH */
        case USB_ST_SETUP:
tr_setup:
                usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
                usbd_transfer_submit(xfer);
                uether_rxflush(ue);
                return;
 
        default:                        /* Error */
                DPRINTF("bulk read error, %s\n",
                    usbd_errstr(error));
 
                if (error != USB_ERR_CANCELLED) {
                        /* try to clear stall first */
                        usbd_xfer_set_stall(xfer);
                        goto tr_setup;
                }
                return;
        }
}
 
static void
aue_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error)
{
        struct aue_softc *sc = usbd_xfer_softc(xfer);
        struct ifnet *ifp = uether_getifp(&sc->sc_ue);
        struct usb_page_cache *pc;
        struct mbuf *m;
        uint8_t buf[2];
        int actlen;
 
        usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
        pc = usbd_xfer_get_frame(xfer, 0);
 
        switch (USB_GET_STATE(xfer)) {
        case USB_ST_TRANSFERRED:
                DPRINTFN(11, "transfer of %d bytes complete\n", actlen);
                if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
 
                /* FALLTHROUGH */
        case USB_ST_SETUP:
tr_setup:
                if ((sc->sc_flags & AUE_FLAG_LINK) == 0) {
                        /*
                         * don't send anything if there is no link !
                         */
                        return;
                }
                IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
 
                if (m == NULL)
                        return;
                if (m->m_pkthdr.len > MCLBYTES)
                        m->m_pkthdr.len = MCLBYTES;
                if (sc->sc_flags & AUE_FLAG_VER_2) {
                        usbd_xfer_set_frame_len(xfer, 0, m->m_pkthdr.len);
 
                        usbd_m_copy_in(pc, 0, m, 0, m->m_pkthdr.len);
 
                } else {
                        usbd_xfer_set_frame_len(xfer, 0, (m->m_pkthdr.len + 2));
 
                        /*
                         * The ADMtek documentation says that the
                         * packet length is supposed to be specified
                         * in the first two bytes of the transfer,
                         * however it actually seems to ignore this
                         * info and base the frame size on the bulk
                         * transfer length.
                         */
                        buf[0] = (uint8_t)(m->m_pkthdr.len);
                        buf[1] = (uint8_t)(m->m_pkthdr.len >> 8);
 
                        usbd_copy_in(pc, 0, buf, 2);
                        usbd_m_copy_in(pc, 2, m, 0, m->m_pkthdr.len);
                }
 
                /*
                 * if there's a BPF listener, bounce a copy
                 * of this frame to him:
                 */
                BPF_MTAP(ifp, m);
 
                m_freem(m);
 
                usbd_transfer_submit(xfer);
                return;
 
        default:                        /* Error */
                DPRINTFN(11, "transfer error, %s\n",
                    usbd_errstr(error));
 
                if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
 
                if (error != USB_ERR_CANCELLED) {
                        /* try to clear stall first */
                        usbd_xfer_set_stall(xfer);
                        goto tr_setup;
                }
                return;
        }
}
 
static void
aue_tick(struct usb_ether *ue)
{
        struct aue_softc *sc = uether_getsc(ue);
        struct mii_data *mii = GET_MII(sc);
 
        AUE_LOCK_ASSERT(sc, MA_OWNED);
 
        mii_tick(mii);
        if ((sc->sc_flags & AUE_FLAG_LINK) == 0
            && mii->mii_media_status & IFM_ACTIVE &&
            IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
                sc->sc_flags |= AUE_FLAG_LINK;
                aue_start(ue);
        }
}
 
static void
aue_start(struct usb_ether *ue)
{
        struct aue_softc *sc = uether_getsc(ue);
 
        /*
         * start the USB transfers, if not already started:
         */
        usbd_transfer_start(sc->sc_xfer[AUE_INTR_DT_RD]);
        usbd_transfer_start(sc->sc_xfer[AUE_BULK_DT_RD]);
        usbd_transfer_start(sc->sc_xfer[AUE_BULK_DT_WR]);
}
 
static void
aue_init(struct usb_ether *ue)
{
        struct aue_softc *sc = uether_getsc(ue);
        struct ifnet *ifp = uether_getifp(ue);
        int i;
 
        AUE_LOCK_ASSERT(sc, MA_OWNED);
 
        /*
         * Cancel pending I/O
         */
        aue_reset(sc);
 
        /* Set MAC address */
        for (i = 0; i != ETHER_ADDR_LEN; i++)
                aue_csr_write_1(sc, AUE_PAR0 + i, IF_LLADDR(ifp)[i]);
 
        /* update promiscuous setting */
        aue_setpromisc(ue);
 
        /* Load the multicast filter. */
        aue_setmulti(ue);
 
        /* Enable RX and TX */
        aue_csr_write_1(sc, AUE_CTL0, AUE_CTL0_RXSTAT_APPEND | AUE_CTL0_RX_ENB);
        AUE_SETBIT(sc, AUE_CTL0, AUE_CTL0_TX_ENB);
        AUE_SETBIT(sc, AUE_CTL2, AUE_CTL2_EP3_CLR);
 
        usbd_xfer_set_stall(sc->sc_xfer[AUE_BULK_DT_WR]);
 
        ifp->if_drv_flags |= IFF_DRV_RUNNING;
        aue_start(ue);
}
 
static void
aue_setpromisc(struct usb_ether *ue)
{
        struct aue_softc *sc = uether_getsc(ue);
        struct ifnet *ifp = uether_getifp(ue);
 
        AUE_LOCK_ASSERT(sc, MA_OWNED);
 
        /* if we want promiscuous mode, set the allframes bit: */
        if (ifp->if_flags & IFF_PROMISC)
                AUE_SETBIT(sc, AUE_CTL2, AUE_CTL2_RX_PROMISC);
        else
                AUE_CLRBIT(sc, AUE_CTL2, AUE_CTL2_RX_PROMISC);
}
 
/*
 * Set media options.
 */
static int
aue_ifmedia_upd(struct ifnet *ifp)
{
        struct aue_softc *sc = ifp->if_softc;
        struct mii_data *mii = GET_MII(sc);
        struct mii_softc *miisc;
        int error;
 
        AUE_LOCK_ASSERT(sc, MA_OWNED);
 
        sc->sc_flags &= ~AUE_FLAG_LINK;
        LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
                PHY_RESET(miisc);
        error = mii_mediachg(mii);
        return (error);
}
 
/*
 * Report current media status.
 */
static void
aue_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
{
        struct aue_softc *sc = ifp->if_softc;
        struct mii_data *mii = GET_MII(sc);
 
        AUE_LOCK(sc);
        mii_pollstat(mii);
        ifmr->ifm_active = mii->mii_media_active;
        ifmr->ifm_status = mii->mii_media_status;
        AUE_UNLOCK(sc);
}
 
/*
 * Stop the adapter and free any mbufs allocated to the
 * RX and TX lists.
 */
static void
aue_stop(struct usb_ether *ue)
{
        struct aue_softc *sc = uether_getsc(ue);
        struct ifnet *ifp = uether_getifp(ue);
 
        AUE_LOCK_ASSERT(sc, MA_OWNED);
 
        ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
        sc->sc_flags &= ~AUE_FLAG_LINK;
 
        /*
         * stop all the transfers, if not already stopped:
         */
        usbd_transfer_stop(sc->sc_xfer[AUE_BULK_DT_WR]);
        usbd_transfer_stop(sc->sc_xfer[AUE_BULK_DT_RD]);
        usbd_transfer_stop(sc->sc_xfer[AUE_INTR_DT_RD]);
 
        aue_csr_write_1(sc, AUE_CTL0, 0);
        aue_csr_write_1(sc, AUE_CTL1, 0);
        aue_reset(sc);
}