if_url.c

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Author : jmatthew
Date : 2021-08-09 07:21:48
Hash : 9d477d68
Message : Fix up flags passed to usbd_open_pipe_intr() - interrupt pipes are always opened exclusively, and the flags argument is passed to usbd_setup_xfer(). USBD_EXCLUSIVE_USE has the same value as USBD_NO_COPY, which means that data transferred would not be copied to the buffer where the driver expects it. None of these drivers actually used the interrupt data for anything, and in some the interrupt pipe code was #if 0'd out, so this doesn't change anything, but fixing this up prevents unwary developers like me from copying code that doesn't work. ok mglocker@
sys/dev/usb/if_url.c
/*	$OpenBSD: if_url.c,v 1.89 2021/08/09 07:21:48 jmatthew Exp $ */
/*	$NetBSD: if_url.c,v 1.6 2002/09/29 10:19:21 martin Exp $	*/
/*
 * Copyright (c) 2001, 2002
 *     Shingo WATANABE <nabe@nabechan.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. 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 THE AUTHOR 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 AUTHOR 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.
 *
 */

/*
 * The RTL8150L(Realtek USB to fast ethernet controller) spec can be found at
 *   ftp://ftp.realtek.com.tw/lancard/data_sheet/8150/8150v14.pdf
 *   ftp://152.104.125.40/lancard/data_sheet/8150/8150v14.pdf
 */

/*
 * TODO:
 *	Interrupt Endpoint support
 *	External PHYs
 */

#include "bpfilter.h"

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

#include <sys/device.h>

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

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

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

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

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

#include <dev/usb/if_urlreg.h>

int url_match(struct device *, void *, void *);
void url_attach(struct device *, struct device *, void *);
int url_detach(struct device *, int);

struct cfdriver url_cd = {
	NULL, "url", DV_IFNET
};

const struct cfattach url_ca = {
	sizeof(struct url_softc), url_match, url_attach, url_detach
};

int url_openpipes(struct url_softc *);
int url_rx_list_init(struct url_softc *);
int url_tx_list_init(struct url_softc *);
int url_newbuf(struct url_softc *, struct url_chain *, struct mbuf *);
void url_start(struct ifnet *);
int url_send(struct url_softc *, struct mbuf *, int);
void url_txeof(struct usbd_xfer *, void *, usbd_status);
void url_rxeof(struct usbd_xfer *, void *, usbd_status);
void url_tick(void *);
void url_tick_task(void *);
int url_ioctl(struct ifnet *, u_long, caddr_t);
void url_stop_task(struct url_softc *);
void url_stop(struct ifnet *, int);
void url_watchdog(struct ifnet *);
int url_ifmedia_change(struct ifnet *);
void url_ifmedia_status(struct ifnet *, struct ifmediareq *);
void url_lock_mii(struct url_softc *);
void url_unlock_mii(struct url_softc *);
int url_int_miibus_readreg(struct device *, int, int);
void url_int_miibus_writereg(struct device *, int, int, int);
void url_miibus_statchg(struct device *);
int url_init(struct ifnet *);
void url_iff(struct url_softc *);
void url_reset(struct url_softc *);

int url_csr_read_1(struct url_softc *, int);
int url_csr_read_2(struct url_softc *, int);
int url_csr_write_1(struct url_softc *, int, int);
int url_csr_write_2(struct url_softc *, int, int);
int url_csr_write_4(struct url_softc *, int, int);
int url_mem(struct url_softc *, int, int, void *, int);

/* Macros */
#ifdef URL_DEBUG
#define DPRINTF(x)	do { if (urldebug) printf x; } while (0)
#define DPRINTFN(n,x)	do { if (urldebug >= (n)) printf x; } while (0)
int urldebug = 0;
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif

#define	URL_SETBIT(sc, reg, x)	\
	url_csr_write_1(sc, reg, url_csr_read_1(sc, reg) | (x))

#define	URL_SETBIT2(sc, reg, x)	\
	url_csr_write_2(sc, reg, url_csr_read_2(sc, reg) | (x))

#define	URL_CLRBIT(sc, reg, x)	\
	url_csr_write_1(sc, reg, url_csr_read_1(sc, reg) & ~(x))

#define	URL_CLRBIT2(sc, reg, x)	\
	url_csr_write_2(sc, reg, url_csr_read_2(sc, reg) & ~(x))

static const struct url_type {
	struct usb_devno url_dev;
	u_int16_t url_flags;
#define URL_EXT_PHY	0x0001
} url_devs [] = {
	{{ USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_LCS8138TX}, 0},
	{{ USB_VENDOR_MELCO, USB_PRODUCT_MELCO_LUAKTX }, 0},
	{{ USB_VENDOR_MICRONET, USB_PRODUCT_MICRONET_SP128AR}, 0},
	{{ USB_VENDOR_OQO, USB_PRODUCT_OQO_ETHER01}, 0},
	{{ USB_VENDOR_REALTEK, USB_PRODUCT_REALTEK_RTL8150}, 0},
	{{ USB_VENDOR_REALTEK, USB_PRODUCT_REALTEK_RTL8151}, 0},
	{{ USB_VENDOR_ZYXEL, USB_PRODUCT_ZYXEL_PRESTIGE}, 0}
};
#define url_lookup(v, p) ((struct url_type *)usb_lookup(url_devs, v, p))


/* Probe */
int
url_match(struct device *parent, void *match, void *aux)
{
	struct usb_attach_arg *uaa = aux;

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

	return (url_lookup(uaa->vendor, uaa->product) != NULL ?
		UMATCH_VENDOR_PRODUCT : UMATCH_NONE);
}
/* Attach */
void
url_attach(struct device *parent, struct device *self, void *aux)
{
	struct url_softc *sc = (struct url_softc *)self;
	struct usb_attach_arg *uaa = aux;
	struct usbd_device *dev = uaa->device;
	struct usbd_interface *iface;
	usbd_status err;
	usb_interface_descriptor_t *id;
	usb_endpoint_descriptor_t *ed;
	char *devname = sc->sc_dev.dv_xname;
	struct ifnet *ifp;
	struct mii_data *mii;
	u_char eaddr[ETHER_ADDR_LEN];
	int i, s;

	sc->sc_udev = dev;

	usb_init_task(&sc->sc_tick_task, url_tick_task, sc,
	    USB_TASK_TYPE_GENERIC);
	rw_init(&sc->sc_mii_lock, "urlmii");
	usb_init_task(&sc->sc_stop_task, (void (*)(void *)) url_stop_task, sc,
	    USB_TASK_TYPE_GENERIC);

	/* get control interface */
	err = usbd_device2interface_handle(dev, URL_IFACE_INDEX, &iface);
	if (err) {
		printf("%s: failed to get interface, err=%s\n", devname,
		       usbd_errstr(err));
		goto bad;
	}

	sc->sc_ctl_iface = iface;
	sc->sc_flags = url_lookup(uaa->vendor, uaa->product)->url_flags;

	/* get interface descriptor */
	id = usbd_get_interface_descriptor(sc->sc_ctl_iface);

	/* find endpoints */
	sc->sc_bulkin_no = sc->sc_bulkout_no = sc->sc_intrin_no = -1;
	for (i = 0; i < id->bNumEndpoints; i++) {
		ed = usbd_interface2endpoint_descriptor(sc->sc_ctl_iface, i);
		if (ed == NULL) {
			printf("%s: couldn't get endpoint %d\n", devname, i);
			goto bad;
		}
		if (UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK &&
		    UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN)
			sc->sc_bulkin_no = ed->bEndpointAddress; /* RX */
		else if (UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK &&
			 UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT)
			sc->sc_bulkout_no = ed->bEndpointAddress; /* TX */
		else if (UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT &&
			 UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN)
			sc->sc_intrin_no = ed->bEndpointAddress; /* Status */
	}

	if (sc->sc_bulkin_no == -1 || sc->sc_bulkout_no == -1 ||
	    sc->sc_intrin_no == -1) {
		printf("%s: missing endpoint\n", devname);
		goto bad;
	}

	s = splnet();

	/* reset the adapter */
	url_reset(sc);

	/* Get Ethernet Address */
	err = url_mem(sc, URL_CMD_READMEM, URL_IDR0, (void *)eaddr,
		      ETHER_ADDR_LEN);
	if (err) {
		printf("%s: read MAC address failed\n", devname);
		splx(s);
		goto bad;
	}

	/* Print Ethernet Address */
	printf("%s: address %s\n", devname, ether_sprintf(eaddr));

	bcopy(eaddr, (char *)&sc->sc_ac.ac_enaddr, ETHER_ADDR_LEN);
	/* initialize interface information */
	ifp = GET_IFP(sc);
	ifp->if_softc = sc;
	strlcpy(ifp->if_xname, devname, IFNAMSIZ);
	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
	ifp->if_start = url_start;
	ifp->if_ioctl = url_ioctl;
	ifp->if_watchdog = url_watchdog;

	ifp->if_capabilities = IFCAP_VLAN_MTU;

	/*
	 * Do ifmedia setup.
	 */
	mii = &sc->sc_mii;
	mii->mii_ifp = ifp;
	mii->mii_readreg = url_int_miibus_readreg;
	mii->mii_writereg = url_int_miibus_writereg;
#if 0
	if (sc->sc_flags & URL_EXT_PHY) {
		mii->mii_readreg = url_ext_miibus_readreg;
		mii->mii_writereg = url_ext_miibus_writereg;
	}
#endif
	mii->mii_statchg = url_miibus_statchg;
	mii->mii_flags = MIIF_AUTOTSLEEP;
	ifmedia_init(&mii->mii_media, 0,
		     url_ifmedia_change, url_ifmedia_status);
	mii_attach(self, mii, 0xffffffff, MII_PHY_ANY, MII_OFFSET_ANY, 0);
	if (LIST_FIRST(&mii->mii_phys) == NULL) {
		ifmedia_add(&mii->mii_media, IFM_ETHER | IFM_NONE, 0, NULL);
		ifmedia_set(&mii->mii_media, IFM_ETHER | IFM_NONE);
	} else
		ifmedia_set(&mii->mii_media, IFM_ETHER | IFM_AUTO);

	/* attach the interface */
	if_attach(ifp);
	ether_ifattach(ifp);

	timeout_set(&sc->sc_stat_ch, url_tick, sc);

	splx(s);

	return;

 bad:
	usbd_deactivate(sc->sc_udev);
}

/* detach */
int
url_detach(struct device *self, int flags)
{
	struct url_softc *sc = (struct url_softc *)self;
	struct ifnet *ifp = GET_IFP(sc);
	int s;

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

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

	/* Remove any pending tasks */
	usb_rem_task(sc->sc_udev, &sc->sc_tick_task);
	usb_rem_task(sc->sc_udev, &sc->sc_stop_task);

	s = splusb();

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

	if (ifp->if_flags & IFF_RUNNING)
		url_stop(GET_IFP(sc), 1);

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

#ifdef DIAGNOSTIC
	if (sc->sc_pipe_tx != NULL)
		printf("%s: detach has active tx endpoint.\n",
		       sc->sc_dev.dv_xname);
	if (sc->sc_pipe_rx != NULL)
		printf("%s: detach has active rx endpoint.\n",
		       sc->sc_dev.dv_xname);
	if (sc->sc_pipe_intr != NULL)
		printf("%s: detach has active intr endpoint.\n",
		       sc->sc_dev.dv_xname);
#endif

	splx(s);

	return (0);
}

/* read/write memory */
int
url_mem(struct url_softc *sc, int cmd, int offset, void *buf, int len)
{
	usb_device_request_t req;
	usbd_status err;

	if (sc == NULL)
		return (0);

	DPRINTFN(0x200,
		("%s: %s: enter\n", sc->sc_dev.dv_xname, __func__));

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

	if (cmd == URL_CMD_READMEM)
		req.bmRequestType = UT_READ_VENDOR_DEVICE;
	else
		req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
	req.bRequest = URL_REQ_MEM;
	USETW(req.wValue, offset);
	USETW(req.wIndex, 0x0000);
	USETW(req.wLength, len);

	sc->sc_refcnt++;
	err = usbd_do_request(sc->sc_udev, &req, buf);
	if (--sc->sc_refcnt < 0)
		usb_detach_wakeup(&sc->sc_dev);
	if (err) {
		DPRINTF(("%s: url_mem(): %s failed. off=%04x, err=%d\n",
			 sc->sc_dev.dv_xname,
			 cmd == URL_CMD_READMEM ? "read" : "write",
			 offset, err));
	}

	return (err);
}

/* read 1byte from register */
int
url_csr_read_1(struct url_softc *sc, int reg)
{
	u_int8_t val = 0;

	DPRINTFN(0x100,
		 ("%s: %s: enter\n", sc->sc_dev.dv_xname, __func__));

	return (url_mem(sc, URL_CMD_READMEM, reg, &val, 1) ? 0 : val);
}

/* read 2bytes from register */
int
url_csr_read_2(struct url_softc *sc, int reg)
{
	uWord val;

	DPRINTFN(0x100,
		 ("%s: %s: enter\n", sc->sc_dev.dv_xname, __func__));

	USETW(val, 0);
	return (url_mem(sc, URL_CMD_READMEM, reg, &val, 2) ? 0 : UGETW(val));
}

/* write 1byte to register */
int
url_csr_write_1(struct url_softc *sc, int reg, int aval)
{
	u_int8_t val = aval;

	DPRINTFN(0x100,
		 ("%s: %s: enter\n", sc->sc_dev.dv_xname, __func__));

	return (url_mem(sc, URL_CMD_WRITEMEM, reg, &val, 1) ? -1 : 0);
}

/* write 2bytes to register */
int
url_csr_write_2(struct url_softc *sc, int reg, int aval)
{
	uWord val;

	DPRINTFN(0x100,
		 ("%s: %s: enter\n", sc->sc_dev.dv_xname, __func__));

	USETW(val, aval);

	return (url_mem(sc, URL_CMD_WRITEMEM, reg, &val, 2) ? -1 : 0);
}

/* write 4bytes to register */
int
url_csr_write_4(struct url_softc *sc, int reg, int aval)
{
	uDWord val;

	DPRINTFN(0x100,
		 ("%s: %s: enter\n", sc->sc_dev.dv_xname, __func__));

	USETDW(val, aval);

	return (url_mem(sc, URL_CMD_WRITEMEM, reg, &val, 4) ? -1 : 0);
}

int
url_init(struct ifnet *ifp)
{
	struct url_softc *sc = ifp->if_softc;
	struct mii_data *mii = GET_MII(sc);
	u_char *eaddr;
	int i, s;

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

	s = splnet();

	/* Cancel pending I/O and free all TX/RX buffers */
	url_stop(ifp, 1);

	eaddr = sc->sc_ac.ac_enaddr;
	for (i = 0; i < ETHER_ADDR_LEN; i++)
		url_csr_write_1(sc, URL_IDR0 + i, eaddr[i]);

	/* Init transmission control register */
	URL_CLRBIT(sc, URL_TCR,
		   URL_TCR_TXRR1 | URL_TCR_TXRR0 |
		   URL_TCR_IFG1 | URL_TCR_IFG0 |
		   URL_TCR_NOCRC);

	/* Init receive control register */
	URL_SETBIT2(sc, URL_RCR, URL_RCR_TAIL);

	/* Initialize transmit ring */
	if (url_tx_list_init(sc) == ENOBUFS) {
		printf("%s: tx list init failed\n", sc->sc_dev.dv_xname);
		splx(s);
		return (EIO);
	}

	/* Initialize receive ring */
	if (url_rx_list_init(sc) == ENOBUFS) {
		printf("%s: rx list init failed\n", sc->sc_dev.dv_xname);
		splx(s);
		return (EIO);
	}

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

	/* Enable RX and TX */
	URL_SETBIT(sc, URL_CR, URL_CR_TE | URL_CR_RE);

	mii_mediachg(mii);

	if (sc->sc_pipe_tx == NULL || sc->sc_pipe_rx == NULL) {
		if (url_openpipes(sc)) {
			splx(s);
			return (EIO);
		}
	}

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

	splx(s);

	timeout_add_sec(&sc->sc_stat_ch, 1);

	return (0);
}

void
url_reset(struct url_softc *sc)
{
	int i;

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

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

	URL_SETBIT(sc, URL_CR, URL_CR_SOFT_RST);

	for (i = 0; i < URL_TX_TIMEOUT; i++) {
		if (!(url_csr_read_1(sc, URL_CR) & URL_CR_SOFT_RST))
			break;
		delay(10);	/* XXX */
	}

	delay(10000);		/* XXX */
}

void
url_iff(struct url_softc *sc)
{
	struct ifnet *ifp = GET_IFP(sc);
	struct arpcom *ac = &sc->sc_ac;
	struct ether_multi *enm;
	struct ether_multistep step;
	u_int32_t hashes[2];
	u_int16_t rcr;
	int h = 0;

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

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

	rcr = url_csr_read_2(sc, URL_RCR);
	rcr &= ~(URL_RCR_AAM | URL_RCR_AAP | URL_RCR_AB | URL_RCR_AD |
	    URL_RCR_AM);
	bzero(hashes, sizeof(hashes));
	ifp->if_flags &= ~IFF_ALLMULTI;

	/*
	 * Always accept broadcast frames.
	 * Always accept frames destined to our station address.
	 */
	rcr |= URL_RCR_AB | URL_RCR_AD;

	if (ifp->if_flags & IFF_PROMISC || ac->ac_multirangecnt > 0) {
		ifp->if_flags |= IFF_ALLMULTI;
		rcr |= URL_RCR_AAM;
		if (ifp->if_flags & IFF_PROMISC)
			rcr |= URL_RCR_AAP;
	} else {
		rcr |= URL_RCR_AM;

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

			if (h < 32)
				hashes[0] |= (1 << h);
			else
				hashes[1] |= (1 << (h - 32));

			ETHER_NEXT_MULTI(step, enm);
		}
	}

	url_csr_write_4(sc, URL_MAR0, hashes[0]);
	url_csr_write_4(sc, URL_MAR4, hashes[1]);
	url_csr_write_2(sc, URL_RCR, rcr);
}

int
url_openpipes(struct url_softc *sc)
{
	struct url_chain *c;
	usbd_status err;
	int i;
	int error = 0;

	if (usbd_is_dying(sc->sc_udev))
		return (EIO);

	sc->sc_refcnt++;

	/* Open RX pipe */
	err = usbd_open_pipe(sc->sc_ctl_iface, sc->sc_bulkin_no,
			     USBD_EXCLUSIVE_USE, &sc->sc_pipe_rx);
	if (err) {
		printf("%s: open rx pipe failed: %s\n",
		       sc->sc_dev.dv_xname, usbd_errstr(err));
		error = EIO;
		goto done;
	}

	/* Open TX pipe */
	err = usbd_open_pipe(sc->sc_ctl_iface, sc->sc_bulkout_no,
			     USBD_EXCLUSIVE_USE, &sc->sc_pipe_tx);
	if (err) {
		printf("%s: open tx pipe failed: %s\n",
		       sc->sc_dev.dv_xname, usbd_errstr(err));
		error = EIO;
		goto done;
	}

#if 0
	/* XXX: interrupt endpoint is not yet supported */
	/* Open Interrupt pipe */
	err = usbd_open_pipe_intr(sc->sc_ctl_iface, sc->sc_intrin_no,
				  0, &sc->sc_pipe_intr, sc,
				  &sc->sc_cdata.url_ibuf, URL_INTR_PKGLEN,
				  url_intr, URL_INTR_INTERVAL);
	if (err) {
		printf("%s: open intr pipe failed: %s\n",
		       sc->sc_dev.dv_xname, usbd_errstr(err));
		error = EIO;
		goto done;
	}
#endif


	/* Start up the receive pipe. */
	for (i = 0; i < URL_RX_LIST_CNT; i++) {
		c = &sc->sc_cdata.url_rx_chain[i];
		usbd_setup_xfer(c->url_xfer, sc->sc_pipe_rx,
				c, c->url_buf, URL_BUFSZ,
				USBD_SHORT_XFER_OK | USBD_NO_COPY,
				USBD_NO_TIMEOUT, url_rxeof);
		(void)usbd_transfer(c->url_xfer);
		DPRINTF(("%s: %s: start read\n", sc->sc_dev.dv_xname,
			 __func__));
	}

 done:
	if (--sc->sc_refcnt < 0)
		usb_detach_wakeup(&sc->sc_dev);

	return (error);
}

int
url_newbuf(struct url_softc *sc, struct url_chain *c, struct mbuf *m)
{
	struct mbuf *m_new = NULL;

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

	if (m == NULL) {
		MGETHDR(m_new, M_DONTWAIT, MT_DATA);
		if (m_new == NULL) {
			printf("%s: no memory for rx list "
			       "-- packet dropped!\n", sc->sc_dev.dv_xname);
			return (ENOBUFS);
		}
		MCLGET(m_new, M_DONTWAIT);
		if (!(m_new->m_flags & M_EXT)) {
			printf("%s: no memory for rx list "
			       "-- packet dropped!\n", sc->sc_dev.dv_xname);
			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->url_mbuf = m_new;

	return (0);
}


int
url_rx_list_init(struct url_softc *sc)
{
	struct url_cdata *cd;
	struct url_chain *c;
	int i;

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

	cd = &sc->sc_cdata;
	for (i = 0; i < URL_RX_LIST_CNT; i++) {
		c = &cd->url_rx_chain[i];
		c->url_sc = sc;
		c->url_idx = i;
		if (url_newbuf(sc, c, NULL) == ENOBUFS)
			return (ENOBUFS);
		if (c->url_xfer == NULL) {
			c->url_xfer = usbd_alloc_xfer(sc->sc_udev);
			if (c->url_xfer == NULL)
				return (ENOBUFS);
			c->url_buf = usbd_alloc_buffer(c->url_xfer, URL_BUFSZ);
			if (c->url_buf == NULL) {
				usbd_free_xfer(c->url_xfer);
				return (ENOBUFS);
			}
		}
	}

	return (0);
}

int
url_tx_list_init(struct url_softc *sc)
{
	struct url_cdata *cd;
	struct url_chain *c;
	int i;

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

	cd = &sc->sc_cdata;
	for (i = 0; i < URL_TX_LIST_CNT; i++) {
		c = &cd->url_tx_chain[i];
		c->url_sc = sc;
		c->url_idx = i;
		c->url_mbuf = NULL;
		if (c->url_xfer == NULL) {
			c->url_xfer = usbd_alloc_xfer(sc->sc_udev);
			if (c->url_xfer == NULL)
				return (ENOBUFS);
			c->url_buf = usbd_alloc_buffer(c->url_xfer, URL_BUFSZ);
			if (c->url_buf == NULL) {
				usbd_free_xfer(c->url_xfer);
				return (ENOBUFS);
			}
		}
	}

	return (0);
}

void
url_start(struct ifnet *ifp)
{
	struct url_softc *sc = ifp->if_softc;
	struct mbuf *m_head = NULL;

	DPRINTF(("%s: %s: enter, link=%d\n", sc->sc_dev.dv_xname,
		 __func__, sc->sc_link));

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

	if (!sc->sc_link)
		return;

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

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

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

	ifq_deq_commit(&ifp->if_snd, m_head);

#if NBPFILTER > 0
	if (ifp->if_bpf)
		bpf_mtap(ifp->if_bpf, m_head, BPF_DIRECTION_OUT);
#endif

	ifq_set_oactive(&ifp->if_snd);

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

int
url_send(struct url_softc *sc, struct mbuf *m, int idx)
{
	int total_len;
	struct url_chain *c;
	usbd_status err;

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

	c = &sc->sc_cdata.url_tx_chain[idx];

	/* Copy the mbuf data into a contiguous buffer */
	m_copydata(m, 0, m->m_pkthdr.len, c->url_buf);
	c->url_mbuf = m;
	total_len = m->m_pkthdr.len;

	if (total_len < URL_MIN_FRAME_LEN) {
		bzero(c->url_buf + total_len, URL_MIN_FRAME_LEN - total_len);
		total_len = URL_MIN_FRAME_LEN;
	}
	usbd_setup_xfer(c->url_xfer, sc->sc_pipe_tx, c, c->url_buf, total_len,
			USBD_FORCE_SHORT_XFER | USBD_NO_COPY,
			URL_TX_TIMEOUT, url_txeof);

	/* Transmit */
	sc->sc_refcnt++;
	err = usbd_transfer(c->url_xfer);
	if (--sc->sc_refcnt < 0)
		usb_detach_wakeup(&sc->sc_dev);
	if (err != USBD_IN_PROGRESS) {
		printf("%s: url_send error=%s\n", sc->sc_dev.dv_xname,
		       usbd_errstr(err));
		/* Stop the interface */
		usb_add_task(sc->sc_udev, &sc->sc_stop_task);
		return (EIO);
	}

	DPRINTF(("%s: %s: send %d bytes\n", sc->sc_dev.dv_xname,
		 __func__, total_len));

	sc->sc_cdata.url_tx_cnt++;

	return (0);
}

void
url_txeof(struct usbd_xfer *xfer, void *priv, usbd_status status)
{
	struct url_chain *c = priv;
	struct url_softc *sc = c->url_sc;
	struct ifnet *ifp = GET_IFP(sc);
	int s;

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

	s = splnet();

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

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

	if (status != USBD_NORMAL_COMPLETION) {
		if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) {
			splx(s);
			return;
		}
		ifp->if_oerrors++;
		printf("%s: usb error on tx: %s\n", sc->sc_dev.dv_xname,
		       usbd_errstr(status));
		if (status == USBD_STALLED) {
			sc->sc_refcnt++;
			usbd_clear_endpoint_stall_async(sc->sc_pipe_tx);
			if (--sc->sc_refcnt < 0)
				usb_detach_wakeup(&sc->sc_dev);
		}
		splx(s);
		return;
	}

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

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

	splx(s);
}

void
url_rxeof(struct usbd_xfer *xfer, void *priv, usbd_status status)
{
	struct url_chain *c = priv;
	struct url_softc *sc = c->url_sc;
	struct ifnet *ifp = GET_IFP(sc);
	struct mbuf_list ml = MBUF_LIST_INITIALIZER();
	struct mbuf *m;
	u_int32_t total_len;
	url_rxhdr_t rxhdr;
	int s;

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

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

	if (status != USBD_NORMAL_COMPLETION) {
		if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
			return;
		sc->sc_rx_errs++;
		if (usbd_ratecheck(&sc->sc_rx_notice)) {
			printf("%s: %u usb errors on rx: %s\n",
			       sc->sc_dev.dv_xname, sc->sc_rx_errs,
			       usbd_errstr(status));
			sc->sc_rx_errs = 0;
		}
		if (status == USBD_STALLED) {
			sc->sc_refcnt++;
			usbd_clear_endpoint_stall_async(sc->sc_pipe_rx);
			if (--sc->sc_refcnt < 0)
				usb_detach_wakeup(&sc->sc_dev);
		}
		goto done;
	}

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

	memcpy(mtod(c->url_mbuf, char *), c->url_buf, total_len);

	if (total_len <= ETHER_CRC_LEN) {
		ifp->if_ierrors++;
		goto done;
	}

	memcpy(&rxhdr, c->url_buf + total_len - ETHER_CRC_LEN, sizeof(rxhdr));

	DPRINTF(("%s: RX Status: %dbytes%s%s%s%s packets\n",
		 sc->sc_dev.dv_xname,
		 UGETW(rxhdr) & URL_RXHDR_BYTEC_MASK,
		 UGETW(rxhdr) & URL_RXHDR_VALID_MASK ? ", Valid" : "",
		 UGETW(rxhdr) & URL_RXHDR_RUNTPKT_MASK ? ", Runt" : "",
		 UGETW(rxhdr) & URL_RXHDR_PHYPKT_MASK ? ", Physical match" : "",
		 UGETW(rxhdr) & URL_RXHDR_MCASTPKT_MASK ? ", Multicast" : ""));

	if ((UGETW(rxhdr) & URL_RXHDR_VALID_MASK) == 0) {
		ifp->if_ierrors++;
		goto done;
	}

	total_len -= ETHER_CRC_LEN;

	m = c->url_mbuf;
	m->m_pkthdr.len = m->m_len = total_len;
	ml_enqueue(&ml, m);

	if (url_newbuf(sc, c, NULL) == ENOBUFS) {
		ifp->if_ierrors++;
		goto done;
	}

	DPRINTF(("%s: %s: deliver %d\n", sc->sc_dev.dv_xname,
		 __func__, m->m_len));

	s = splnet();
	if_input(ifp, &ml);
	splx(s);

 done:
	/* Setup new transfer */
	usbd_setup_xfer(xfer, sc->sc_pipe_rx, c, c->url_buf, URL_BUFSZ,
			USBD_SHORT_XFER_OK | USBD_NO_COPY,
			USBD_NO_TIMEOUT, url_rxeof);
	sc->sc_refcnt++;
	usbd_transfer(xfer);
	if (--sc->sc_refcnt < 0)
		usb_detach_wakeup(&sc->sc_dev);

	DPRINTF(("%s: %s: start rx\n", sc->sc_dev.dv_xname, __func__));
}

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

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

	if (usbd_is_dying(sc->sc_udev))
		return ENXIO;

	s = splnet();

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

	case SIOCSIFFLAGS:
		if (ifp->if_flags & IFF_UP) {
			if (ifp->if_flags & IFF_RUNNING)
				error = ENETRESET;
			else
				url_init(ifp);
		} else {
			if (ifp->if_flags & IFF_RUNNING)
				url_stop(ifp, 1);
		}
		break;

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

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

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

	splx(s);
	return (error);
}

void
url_watchdog(struct ifnet *ifp)
{
	struct url_softc *sc = ifp->if_softc;
	struct url_chain *c;
	usbd_status stat;
	int s;

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

	ifp->if_oerrors++;
	printf("%s: watchdog timeout\n", sc->sc_dev.dv_xname);

	s = splusb();
	c = &sc->sc_cdata.url_tx_chain[0];
	usbd_get_xfer_status(c->url_xfer, NULL, NULL, NULL, &stat);
	url_txeof(c->url_xfer, c, stat);

	if (ifq_empty(&ifp->if_snd) == 0)
		url_start(ifp);
	splx(s);
}

void
url_stop_task(struct url_softc *sc)
{
	url_stop(GET_IFP(sc), 1);
}

/* Stop the adapter and free any mbufs allocated to the RX and TX lists. */
void
url_stop(struct ifnet *ifp, int disable)
{
	struct url_softc *sc = ifp->if_softc;
	usbd_status err;
	int i;

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

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

	url_reset(sc);

	timeout_del(&sc->sc_stat_ch);

	/* Stop transfers */
	/* RX endpoint */
	if (sc->sc_pipe_rx != NULL) {
		err = usbd_close_pipe(sc->sc_pipe_rx);
		if (err)
			printf("%s: close rx pipe failed: %s\n",
			       sc->sc_dev.dv_xname, usbd_errstr(err));
		sc->sc_pipe_rx = NULL;
	}

	/* TX endpoint */
	if (sc->sc_pipe_tx != NULL) {
		err = usbd_close_pipe(sc->sc_pipe_tx);
		if (err)
			printf("%s: close tx pipe failed: %s\n",
			       sc->sc_dev.dv_xname, usbd_errstr(err));
		sc->sc_pipe_tx = NULL;
	}

#if 0
	/* XXX: Interrupt endpoint is not yet supported!! */
	/* Interrupt endpoint */
	if (sc->sc_pipe_intr != NULL) {
		err = usbd_close_pipe(sc->sc_pipe_intr);
		if (err)
			printf("%s: close intr pipe failed: %s\n",
			       sc->sc_dev.dv_xname, usbd_errstr(err));
		sc->sc_pipe_intr = NULL;
	}
#endif

	/* Free RX resources. */
	for (i = 0; i < URL_RX_LIST_CNT; i++) {
		if (sc->sc_cdata.url_rx_chain[i].url_mbuf != NULL) {
			m_freem(sc->sc_cdata.url_rx_chain[i].url_mbuf);
			sc->sc_cdata.url_rx_chain[i].url_mbuf = NULL;
		}
		if (sc->sc_cdata.url_rx_chain[i].url_xfer != NULL) {
			usbd_free_xfer(sc->sc_cdata.url_rx_chain[i].url_xfer);
			sc->sc_cdata.url_rx_chain[i].url_xfer = NULL;
		}
	}

	/* Free TX resources. */
	for (i = 0; i < URL_TX_LIST_CNT; i++) {
		if (sc->sc_cdata.url_tx_chain[i].url_mbuf != NULL) {
			m_freem(sc->sc_cdata.url_tx_chain[i].url_mbuf);
			sc->sc_cdata.url_tx_chain[i].url_mbuf = NULL;
		}
		if (sc->sc_cdata.url_tx_chain[i].url_xfer != NULL) {
			usbd_free_xfer(sc->sc_cdata.url_tx_chain[i].url_xfer);
			sc->sc_cdata.url_tx_chain[i].url_xfer = NULL;
		}
	}

	sc->sc_link = 0;
}

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

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

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

	sc->sc_link = 0;
	if (mii->mii_instance) {
		struct mii_softc *miisc;
		LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
			mii_phy_reset(miisc);
	}

	return (mii_mediachg(mii));
}

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

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

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

	if ((ifp->if_flags & IFF_RUNNING) == 0) {
		ifmr->ifm_active = IFM_ETHER | IFM_NONE;
		ifmr->ifm_status = 0;
		return;
	}

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

void
url_tick(void *xsc)
{
	struct url_softc *sc = xsc;

	if (sc == NULL)
		return;

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

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

	/* Perform periodic stuff in process context */
	usb_add_task(sc->sc_udev, &sc->sc_tick_task);
}

void
url_tick_task(void *xsc)
{
	struct url_softc *sc = xsc;
	struct ifnet *ifp;
	struct mii_data *mii;
	int s;

	if (sc == NULL)
		return;

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

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

	ifp = GET_IFP(sc);
	mii = GET_MII(sc);

	if (mii == NULL)
		return;

	s = splnet();

	mii_tick(mii);
	if (!sc->sc_link && mii->mii_media_status & IFM_ACTIVE &&
	    IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
		DPRINTF(("%s: %s: got link\n",
			 sc->sc_dev.dv_xname, __func__));
		sc->sc_link++;
		if (ifq_empty(&ifp->if_snd) == 0)
			   url_start(ifp);
	}

	timeout_add_sec(&sc->sc_stat_ch, 1);

	splx(s);
}

/* Get exclusive access to the MII registers */
void
url_lock_mii(struct url_softc *sc)
{
	DPRINTFN(0xff, ("%s: %s: enter\n", sc->sc_dev.dv_xname,
			__func__));

	sc->sc_refcnt++;
	rw_enter_write(&sc->sc_mii_lock);
}

void
url_unlock_mii(struct url_softc *sc)
{
	DPRINTFN(0xff, ("%s: %s: enter\n", sc->sc_dev.dv_xname,
		       __func__));

	rw_exit_write(&sc->sc_mii_lock);
	if (--sc->sc_refcnt < 0)
		usb_detach_wakeup(&sc->sc_dev);
}

int
url_int_miibus_readreg(struct device *dev, int phy, int reg)
{
	struct url_softc *sc;
	u_int16_t val;

	if (dev == NULL)
		return (0);

	sc = (void *)dev;

	DPRINTFN(0xff, ("%s: %s: enter, phy=%d reg=0x%04x\n",
		 sc->sc_dev.dv_xname, __func__, phy, reg));

	if (usbd_is_dying(sc->sc_udev)) {
#ifdef DIAGNOSTIC
		printf("%s: %s: dying\n", sc->sc_dev.dv_xname,
		       __func__);
#endif
		return (0);
	}

	/* XXX: one PHY only for the RTL8150 internal PHY */
	if (phy != 0) {
		DPRINTFN(0xff, ("%s: %s: phy=%d is not supported\n",
			 sc->sc_dev.dv_xname, __func__, phy));
		return (0);
	}

	url_lock_mii(sc);

	switch (reg) {
	case MII_BMCR:		/* Control Register */
		reg = URL_BMCR;
		break;
	case MII_BMSR:		/* Status Register */
		reg = URL_BMSR;
		break;
	case MII_PHYIDR1:
	case MII_PHYIDR2:
		val = 0;
		goto R_DONE;
		break;
	case MII_ANAR:		/* Autonegotiation advertisement */
		reg = URL_ANAR;
		break;
	case MII_ANLPAR:	/* Autonegotiation link partner abilities */
		reg = URL_ANLP;
		break;
	case URLPHY_MSR:	/* Media Status Register */
		reg = URL_MSR;
		break;
	default:
		printf("%s: %s: bad register %04x\n",
		       sc->sc_dev.dv_xname, __func__, reg);
		val = 0;
		goto R_DONE;
		break;
	}

	if (reg == URL_MSR)
		val = url_csr_read_1(sc, reg);
	else
		val = url_csr_read_2(sc, reg);

 R_DONE:
	DPRINTFN(0xff, ("%s: %s: phy=%d reg=0x%04x => 0x%04x\n",
		 sc->sc_dev.dv_xname, __func__, phy, reg, val));

	url_unlock_mii(sc);
	return (val);
}

void
url_int_miibus_writereg(struct device *dev, int phy, int reg, int data)
{
	struct url_softc *sc;

	if (dev == NULL)
		return;

	sc = (void *)dev;

	DPRINTFN(0xff, ("%s: %s: enter, phy=%d reg=0x%04x data=0x%04x\n",
		 sc->sc_dev.dv_xname, __func__, phy, reg, data));

	if (usbd_is_dying(sc->sc_udev)) {
#ifdef DIAGNOSTIC
		printf("%s: %s: dying\n", sc->sc_dev.dv_xname,
		       __func__);
#endif
		return;
	}

	/* XXX: one PHY only for the RTL8150 internal PHY */
	if (phy != 0) {
		DPRINTFN(0xff, ("%s: %s: phy=%d is not supported\n",
			 sc->sc_dev.dv_xname, __func__, phy));
		return;
	}

	url_lock_mii(sc);

	switch (reg) {
	case MII_BMCR:		/* Control Register */
		reg = URL_BMCR;
		break;
	case MII_BMSR:		/* Status Register */
		reg = URL_BMSR;
		break;
	case MII_PHYIDR1:
	case MII_PHYIDR2:
		goto W_DONE;
		break;
	case MII_ANAR:		/* Autonegotiation advertisement */
		reg = URL_ANAR;
		break;
	case MII_ANLPAR:	/* Autonegotiation link partner abilities */
		reg = URL_ANLP;
		break;
	case URLPHY_MSR:	/* Media Status Register */
		reg = URL_MSR;
		break;
	default:
		printf("%s: %s: bad register %04x\n",
		       sc->sc_dev.dv_xname, __func__, reg);
		goto W_DONE;
		break;
	}

	if (reg == URL_MSR)
		url_csr_write_1(sc, reg, data);
	else
		url_csr_write_2(sc, reg, data);
 W_DONE:

	url_unlock_mii(sc);
	return;
}

void
url_miibus_statchg(struct device *dev)
{
#ifdef URL_DEBUG
	struct url_softc *sc;

	if (dev == NULL)
		return;

	sc = (void *)dev;
	DPRINTF(("%s: %s: enter\n", sc->sc_dev.dv_xname, __func__));
#endif
	/* Nothing to do */
}

#if 0
/*
 * external PHYs support, but not test.
 */
int
url_ext_miibus_redreg(struct device *dev, int phy, int reg)
{
	struct url_softc *sc = (void *)dev;
	u_int16_t val;

	DPRINTF(("%s: %s: enter, phy=%d reg=0x%04x\n",
		 sc->sc_dev.dv_xname, __func__, phy, reg));

	if (usbd_is_dying(sc->sc_udev)) {
#ifdef DIAGNOSTIC
		printf("%s: %s: dying\n", sc->sc_dev.dv_xname,
		       __func__);
#endif
		return (0);
	}

	url_lock_mii(sc);

	url_csr_write_1(sc, URL_PHYADD, phy & URL_PHYADD_MASK);
	/*
	 * RTL8150L will initiate a MII management data transaction
	 * if PHYCNT_OWN bit is set 1 by software. After transaction,
	 * this bit is auto cleared by TRL8150L.
	 */
	url_csr_write_1(sc, URL_PHYCNT,
			(reg | URL_PHYCNT_PHYOWN) & ~URL_PHYCNT_RWCR);
	for (i = 0; i < URL_TIMEOUT; i++) {
		if ((url_csr_read_1(sc, URL_PHYCNT) & URL_PHYCNT_PHYOWN) == 0)
			break;
	}
	if (i == URL_TIMEOUT) {
		printf("%s: MII read timed out\n", sc->sc_dev.dv_xname);
	}

	val = url_csr_read_2(sc, URL_PHYDAT);

	DPRINTF(("%s: %s: phy=%d reg=0x%04x => 0x%04x\n",
		 sc->sc_dev.dv_xname, __func__, phy, reg, val));

	url_unlock_mii(sc);
	return (val);
}

void
url_ext_miibus_writereg(struct device *dev, int phy, int reg, int data)
{
	struct url_softc *sc = (void *)dev;

	DPRINTF(("%s: %s: enter, phy=%d reg=0x%04x data=0x%04x\n",
		 sc->sc_dev.dv_xname, __func__, phy, reg, data));

	if (usbd_is_dying(sc->sc_udev)) {
#ifdef DIAGNOSTIC
		printf("%s: %s: dying\n", sc->sc_dev.dv_xname,
		       __func__);
#endif
		return;
	}

	url_lock_mii(sc);

	url_csr_write_2(sc, URL_PHYDAT, data);
	url_csr_write_1(sc, URL_PHYADD, phy);
	url_csr_write_1(sc, URL_PHYCNT, reg | URL_PHYCNT_RWCR);	/* Write */

	for (i=0; i < URL_TIMEOUT; i++) {
		if (url_csr_read_1(sc, URL_PHYCNT) & URL_PHYCNT_PHYOWN)
			break;
	}

	if (i == URL_TIMEOUT) {
		printf("%s: MII write timed out\n",
		       sc->sc_dev.dv_xname);
	}

	url_unlock_mii(sc);
	return;
}
#endif
IABSD.fr/src/sys/dev/usb/if_url.c

Commit

IABSD.fr/src /sys/dev/usb/if_url.c
