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NetBSD/sys/dev/ic/smc91cxx.c

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/* $NetBSD: smc91cxx.c,v 1.58 2006/11/16 01:32:52 christos Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Copyright (c) 1996 Gardner Buchanan <gbuchanan@shl.com>
* 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 Gardner Buchanan.
* 4. The name of Gardner Buchanan may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*
* from FreeBSD Id: if_sn.c,v 1.4 1996/03/18 15:47:16 gardner Exp
*/
/*
* Core driver for the SMC 91Cxx family of Ethernet chips.
*
* Memory allocation interrupt logic is drived from an SMC 91C90 driver
* written for NetBSD/amiga by Michael Hitch.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: smc91cxx.c,v 1.58 2006/11/16 01:32:52 christos Exp $");
#include "opt_inet.h"
#include "bpfilter.h"
#include "rnd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#include <machine/bus.h>
#include <machine/intr.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_ether.h>
#include <net/if_media.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_inarp.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#endif
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/mii/mii_bitbang.h>
#include <dev/ic/smc91cxxreg.h>
#include <dev/ic/smc91cxxvar.h>
#ifndef __BUS_SPACE_HAS_STREAM_METHODS
#define bus_space_write_multi_stream_2 bus_space_write_multi_2
#define bus_space_write_multi_stream_4 bus_space_write_multi_4
#define bus_space_read_multi_stream_2 bus_space_read_multi_2
#define bus_space_read_multi_stream_4 bus_space_read_multi_4
#define bus_space_write_stream_4 bus_space_write_4
#define bus_space_read_stream_4 bus_space_read_4
#endif /* __BUS_SPACE_HAS_STREAM_METHODS */
/* XXX Hardware padding doesn't work yet(?) */
#define SMC91CXX_SW_PAD
const char *smc91cxx_idstrs[] = {
NULL, /* 0 */
NULL, /* 1 */
NULL, /* 2 */
"SMC91C90/91C92", /* 3 */
"SMC91C94/91C96", /* 4 */
"SMC91C95", /* 5 */
NULL, /* 6 */
"SMC91C100", /* 7 */
"SMC91C100FD", /* 8 */
"SMC91C111", /* 9 */
NULL, /* 10 */
NULL, /* 11 */
NULL, /* 12 */
NULL, /* 13 */
NULL, /* 14 */
NULL, /* 15 */
};
/* Supported media types. */
const int smc91cxx_media[] = {
IFM_ETHER|IFM_10_T,
IFM_ETHER|IFM_10_5,
};
#define NSMC91CxxMEDIA (sizeof(smc91cxx_media) / sizeof(smc91cxx_media[0]))
/*
* MII bit-bang glue.
*/
u_int32_t smc91cxx_mii_bitbang_read(struct device *);
void smc91cxx_mii_bitbang_write(struct device *, u_int32_t);
const struct mii_bitbang_ops smc91cxx_mii_bitbang_ops = {
smc91cxx_mii_bitbang_read,
smc91cxx_mii_bitbang_write,
{
MR_MDO, /* MII_BIT_MDO */
MR_MDI, /* MII_BIT_MDI */
MR_MCLK, /* MII_BIT_MDC */
MR_MDOE, /* MII_BIT_DIR_HOST_PHY */
0, /* MII_BIT_DIR_PHY_HOST */
}
};
/* MII callbacks */
int smc91cxx_mii_readreg(struct device *, int, int);
void smc91cxx_mii_writereg(struct device *, int, int, int);
void smc91cxx_statchg(struct device *);
void smc91cxx_tick(void *);
int smc91cxx_mediachange(struct ifnet *);
void smc91cxx_mediastatus(struct ifnet *, struct ifmediareq *);
int smc91cxx_set_media(struct smc91cxx_softc *, int);
void smc91cxx_init(struct smc91cxx_softc *);
void smc91cxx_read(struct smc91cxx_softc *);
void smc91cxx_reset(struct smc91cxx_softc *);
void smc91cxx_start(struct ifnet *);
void smc91cxx_copy_tx_frame(struct smc91cxx_softc *, struct mbuf *);
void smc91cxx_resume(struct smc91cxx_softc *);
void smc91cxx_stop(struct smc91cxx_softc *);
void smc91cxx_watchdog(struct ifnet *);
int smc91cxx_ioctl(struct ifnet *, u_long, caddr_t);
static inline int ether_cmp(void *, void *);
static inline int
ether_cmp(va, vb)
void *va, *vb;
{
u_int8_t *a = va;
u_int8_t *b = vb;
return ((a[5] != b[5]) || (a[4] != b[4]) || (a[3] != b[3]) ||
(a[2] != b[2]) || (a[1] != b[1]) || (a[0] != b[0]));
}
void
smc91cxx_attach(sc, myea)
struct smc91cxx_softc *sc;
u_int8_t *myea;
{
struct ifnet *ifp = &sc->sc_ec.ec_if;
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
struct ifmedia *ifm = &sc->sc_mii.mii_media;
const char *idstr;
u_int32_t miicapabilities;
u_int16_t tmp;
u_int8_t enaddr[ETHER_ADDR_LEN];
int i, aui, mult, scale, memsize;
char pbuf[9];
tmp = bus_space_read_2(bst, bsh, BANK_SELECT_REG_W);
/* check magic number */
if ((tmp & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
aprint_error("%s: failed to detect chip, bsr=%04x\n",
sc->sc_dev.dv_xname, tmp);
return;
}
/* Make sure the chip is stopped. */
smc91cxx_stop(sc);
SMC_SELECT_BANK(sc, 3);
tmp = bus_space_read_2(bst, bsh, REVISION_REG_W);
sc->sc_chipid = RR_ID(tmp);
idstr = smc91cxx_idstrs[sc->sc_chipid];
aprint_normal("%s: ", sc->sc_dev.dv_xname);
if (idstr != NULL)
aprint_normal("%s, ", idstr);
else
aprint_normal("unknown chip id %d, ", sc->sc_chipid);
aprint_normal("revision %d, ", RR_REV(tmp));
SMC_SELECT_BANK(sc, 0);
switch (sc->sc_chipid) {
default:
mult = MCR_MEM_MULT(bus_space_read_2(bst, bsh, MEM_CFG_REG_W));
scale = MIR_SCALE_91C9x;
break;
case CHIP_91C111:
mult = MIR_MULT_91C111;
scale = MIR_SCALE_91C111;
}
memsize = bus_space_read_2(bst, bsh, MEM_INFO_REG_W) & MIR_TOTAL_MASK;
if (memsize == 255) memsize++;
memsize *= scale * mult;
format_bytes(pbuf, sizeof(pbuf), memsize);
aprint_normal("buffer size: %s\n", pbuf);
/* Read the station address from the chip. */
SMC_SELECT_BANK(sc, 1);
if (myea == NULL) {
myea = enaddr;
for (i = 0; i < ETHER_ADDR_LEN; i += 2) {
tmp = bus_space_read_2(bst, bsh, IAR_ADDR0_REG_W + i);
myea[i + 1] = (tmp >> 8) & 0xff;
myea[i] = tmp & 0xff;
}
}
aprint_normal("%s: MAC address %s, ", sc->sc_dev.dv_xname,
ether_sprintf(myea));
/* Initialize the ifnet structure. */
strcpy(ifp->if_xname, sc->sc_dev.dv_xname);
ifp->if_softc = sc;
ifp->if_start = smc91cxx_start;
ifp->if_ioctl = smc91cxx_ioctl;
ifp->if_watchdog = smc91cxx_watchdog;
ifp->if_flags =
IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST;
IFQ_SET_READY(&ifp->if_snd);
/* Attach the interface. */
if_attach(ifp);
ether_ifattach(ifp, myea);
/*
* Initialize our media structures and MII info. We will
* probe the MII if we are on the SMC91Cxx
*/
sc->sc_mii.mii_ifp = ifp;
sc->sc_mii.mii_readreg = smc91cxx_mii_readreg;
sc->sc_mii.mii_writereg = smc91cxx_mii_writereg;
sc->sc_mii.mii_statchg = smc91cxx_statchg;
ifmedia_init(ifm, IFM_IMASK, smc91cxx_mediachange, smc91cxx_mediastatus);
SMC_SELECT_BANK(sc, 1);
tmp = bus_space_read_2(bst, bsh, CONFIG_REG_W);
miicapabilities = BMSR_MEDIAMASK|BMSR_ANEG;
switch (sc->sc_chipid) {
case CHIP_91100:
/*
* The 91100 does not have full-duplex capabilities,
* even if the PHY does.
*/
miicapabilities &= ~(BMSR_100TXFDX | BMSR_10TFDX);
case CHIP_91100FD:
case CHIP_91C111:
if (tmp & CR_MII_SELECT) {
aprint_normal("default media MII");
if (sc->sc_chipid == CHIP_91C111) {
aprint_normal(" (%s PHY)\n", (tmp & CR_AUI_SELECT) ?
"external" : "internal");
sc->sc_internal_phy = !(tmp & CR_AUI_SELECT);
} else
aprint_normal("\n");
mii_attach(&sc->sc_dev, &sc->sc_mii, miicapabilities,
MII_PHY_ANY, MII_OFFSET_ANY, 0);
if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) {
ifmedia_add(&sc->sc_mii.mii_media,
IFM_ETHER|IFM_NONE, 0, NULL);
ifmedia_set(&sc->sc_mii.mii_media,
IFM_ETHER|IFM_NONE);
} else {
ifmedia_set(&sc->sc_mii.mii_media,
IFM_ETHER|IFM_AUTO);
}
sc->sc_flags |= SMC_FLAGS_HAS_MII;
break;
} else
if (sc->sc_chipid == CHIP_91C111) {
/*
* XXX: Should bring it out of low-power mode
*/
aprint_normal("EPH interface in low power mode\n");
sc->sc_internal_phy = 0;
return;
}
/*FALLTHROUGH*/
default:
aprint_normal("default media %s\n", (aui = (tmp & CR_AUI_SELECT)) ?
"AUI" : "UTP");
for (i = 0; i < NSMC91CxxMEDIA; i++)
ifmedia_add(ifm, smc91cxx_media[i], 0, NULL);
ifmedia_set(ifm, IFM_ETHER | (aui ? IFM_10_5 : IFM_10_T));
break;
}
#if NRND > 0
rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname,
RND_TYPE_NET, 0);
#endif
/* The attach is successful. */
sc->sc_flags |= SMC_FLAGS_ATTACHED;
}
/*
* Change media according to request.
*/
int
smc91cxx_mediachange(ifp)
struct ifnet *ifp;
{
struct smc91cxx_softc *sc = ifp->if_softc;
return (smc91cxx_set_media(sc, sc->sc_mii.mii_media.ifm_media));
}
int
smc91cxx_set_media(sc, media)
struct smc91cxx_softc *sc;
int media;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
u_int16_t tmp;
/*
* If the interface is not currently powered on, just return.
* When it is enabled later, smc91cxx_init() will properly set
* up the media for us.
*/
if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0)
return (0);
if (IFM_TYPE(media) != IFM_ETHER)
return (EINVAL);
if (sc->sc_flags & SMC_FLAGS_HAS_MII)
return (mii_mediachg(&sc->sc_mii));
switch (IFM_SUBTYPE(media)) {
case IFM_10_T:
case IFM_10_5:
SMC_SELECT_BANK(sc, 1);
tmp = bus_space_read_2(bst, bsh, CONFIG_REG_W);
if (IFM_SUBTYPE(media) == IFM_10_5)
tmp |= CR_AUI_SELECT;
else
tmp &= ~CR_AUI_SELECT;
bus_space_write_2(bst, bsh, CONFIG_REG_W, tmp);
delay(20000); /* XXX is this needed? */
break;
default:
return (EINVAL);
}
return (0);
}
/*
* Notify the world which media we're using.
*/
void
smc91cxx_mediastatus(ifp, ifmr)
struct ifnet *ifp;
struct ifmediareq *ifmr;
{
struct smc91cxx_softc *sc = ifp->if_softc;
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
u_int16_t tmp;
if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0) {
ifmr->ifm_active = IFM_ETHER | IFM_NONE;
ifmr->ifm_status = 0;
return;
}
/*
* If we have MII, go ask the PHY what's going on.
*/
if (sc->sc_flags & SMC_FLAGS_HAS_MII) {
mii_pollstat(&sc->sc_mii);
ifmr->ifm_active = sc->sc_mii.mii_media_active;
ifmr->ifm_status = sc->sc_mii.mii_media_status;
return;
}
SMC_SELECT_BANK(sc, 1);
tmp = bus_space_read_2(bst, bsh, CONFIG_REG_W);
ifmr->ifm_active =
IFM_ETHER | ((tmp & CR_AUI_SELECT) ? IFM_10_5 : IFM_10_T);
}
/*
* Reset and initialize the chip.
*/
void
smc91cxx_init(sc)
struct smc91cxx_softc *sc;
{
struct ifnet *ifp = &sc->sc_ec.ec_if;
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
u_int16_t tmp;
u_int8_t *enaddr;
int s, i;
s = splnet();
/*
* This resets the registers mostly to defaults, but doesn't
* affect the EEPROM. After the reset cycle, we pause briefly
* for the chip to recover.
*
* XXX how long are we really supposed to delay? --thorpej
*/
SMC_SELECT_BANK(sc, 0);
bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, RCR_SOFTRESET);
delay(100);
bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, 0);
delay(200);
bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, 0);
/* Set the Ethernet address. */
SMC_SELECT_BANK(sc, 1);
enaddr = (u_int8_t *)LLADDR(ifp->if_sadl);
for (i = 0; i < ETHER_ADDR_LEN; i += 2) {
tmp = enaddr[i + 1] << 8 | enaddr[i];
bus_space_write_2(bst, bsh, IAR_ADDR0_REG_W + i, tmp);
}
/*
* Set the control register to automatically release successfully
* transmitted packets (making the best use of our limited memory)
* and enable the EPH interrupt on certain TX errors.
*/
bus_space_write_2(bst, bsh, CONTROL_REG_W, (CTR_AUTO_RELEASE |
CTR_TE_ENABLE | CTR_CR_ENABLE | CTR_LE_ENABLE));
/*
* Reset the MMU and wait for it to be un-busy.
*/
SMC_SELECT_BANK(sc, 2);
bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_RESET);
for (;;) {
tmp = bus_space_read_2(bst, bsh, MMU_CMD_REG_W);
if (tmp == 0xffff) /* card went away! */
return;
if ((tmp & MMUCR_BUSY) == 0)
break;
}
/*
* Disable all interrupts.
*/
bus_space_write_1(bst, bsh, INTR_MASK_REG_B, 0);
/*
* On the 91c111, enable auto-negotiation, and set the LED
* status pins to something sane.
* XXX: Should be some way for MD code to decide the latter.
*/
SMC_SELECT_BANK(sc, 0);
if (sc->sc_chipid == CHIP_91C111) {
bus_space_write_2(bst, bsh, RX_PHY_CONTROL_REG_W,
RPC_ANEG |
(RPC_LS_LINK_DETECT << RPC_LSA_SHIFT) |
(RPC_LS_TXRX << RPC_LSB_SHIFT));
}
/*
* Set current media.
*/
smc91cxx_set_media(sc, sc->sc_mii.mii_media.ifm_cur->ifm_media);
/*
* Set the receive filter. We want receive enable and auto
* strip of CRC from received packet. If we are in promisc. mode,
* then set that bit as well.
*
* XXX Initialize multicast filter. For now, we just accept
* XXX all multicast.
*/
SMC_SELECT_BANK(sc, 0);
tmp = RCR_ENABLE | RCR_STRIP_CRC | RCR_ALMUL;
if (ifp->if_flags & IFF_PROMISC)
tmp |= RCR_PROMISC;
bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, tmp);
/*
* Set transmitter control to "enabled".
*/
tmp = TCR_ENABLE;
#ifndef SMC91CXX_SW_PAD
/*
* Enable hardware padding of transmitted packets.
* XXX doesn't work?
*/
tmp |= TCR_PAD_ENABLE;
#endif
bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, tmp);
/*
* Now, enable interrupts.
*/
SMC_SELECT_BANK(sc, 2);
if (sc->sc_chipid == CHIP_91C111 && sc->sc_internal_phy) {
bus_space_write_1(bst, bsh, INTR_MASK_REG_B,
IM_EPH_INT | IM_RX_OVRN_INT |
IM_RCV_INT | IM_TX_INT | IM_MD_INT);
} else {
bus_space_write_1(bst, bsh, INTR_MASK_REG_B,
IM_EPH_INT | IM_RX_OVRN_INT | IM_RCV_INT | IM_TX_INT);
}
/* Interface is now running, with no output active. */
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
if (sc->sc_flags & SMC_FLAGS_HAS_MII) {
/* Start the one second clock. */
callout_reset(&sc->sc_mii_callout, hz, smc91cxx_tick, sc);
}
/*
* Attempt to start any pending transmission.
*/
smc91cxx_start(ifp);
splx(s);
}
/*
* Start output on an interface.
* Must be called at splnet or interrupt level.
*/
void
smc91cxx_start(ifp)
struct ifnet *ifp;
{
struct smc91cxx_softc *sc = ifp->if_softc;
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
u_int len;
struct mbuf *m;
u_int16_t length, npages;
u_int8_t packetno;
int timo, pad;
if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING)
return;
again:
/*
* Peek at the next packet.
*/
IFQ_POLL(&ifp->if_snd, m);
if (m == NULL)
return;
/*
* Compute the frame length and set pad to give an overall even
* number of bytes. Below, we assume that the packet length
* is even.
*/
for (len = 0; m != NULL; m = m->m_next)
len += m->m_len;
pad = (len & 1);
/*
* We drop packets that are too large. Perhaps we should
* truncate them instead?
*/
if ((len + pad) > (ETHER_MAX_LEN - ETHER_CRC_LEN)) {
printf("%s: large packet discarded\n", sc->sc_dev.dv_xname);
ifp->if_oerrors++;
IFQ_DEQUEUE(&ifp->if_snd, m);
m_freem(m);
goto readcheck;
}
#ifdef SMC91CXX_SW_PAD
/*
* Not using hardware padding; pad to ETHER_MIN_LEN.
*/
if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN))
pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
#endif
length = pad + len;
/*
* The MMU has a 256 byte page size. The MMU expects us to
* ask for "npages - 1". We include space for the status word,
* byte count, and control bytes in the allocation request.
*/
npages = (length + 6) >> 8;
/*
* Now allocate the memory.
*/
SMC_SELECT_BANK(sc, 2);
bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_ALLOC | npages);
timo = MEMORY_WAIT_TIME;
do {
if (bus_space_read_1(bst, bsh, INTR_STAT_REG_B) & IM_ALLOC_INT)
break;
delay(1);
} while (--timo);
packetno = bus_space_read_1(bst, bsh, ALLOC_RESULT_REG_B);
if (packetno & ARR_FAILED || timo == 0) {
/*
* No transmit memory is available. Record the number
* of requestd pages and enable the allocation completion
* interrupt. Set up the watchdog timer in case we miss
* the interrupt. Mark the interface as active so that
* no one else attempts to transmit while we're allocating
* memory.
*/
bus_space_write_1(bst, bsh, INTR_MASK_REG_B,
bus_space_read_1(bst, bsh, INTR_MASK_REG_B) | IM_ALLOC_INT);
ifp->if_timer = 5;
ifp->if_flags |= IFF_OACTIVE;
return;
}
/*
* We have a packet number - set the data window.
*/
bus_space_write_1(bst, bsh, PACKET_NUM_REG_B, packetno);
/*
* Point to the beginning of the packet.
*/
bus_space_write_2(bst, bsh, POINTER_REG_W, PTR_AUTOINC /* | 0x0000 */);
/*
* Send the packet length (+6 for stats, length, and control bytes)
* and the status word (set to zeros).
*/
bus_space_write_2(bst, bsh, DATA_REG_W, 0);
bus_space_write_2(bst, bsh, DATA_REG_W, (length + 6) & 0x7ff);
/*
* Get the packet from the kernel. This will include the Ethernet
* frame header, MAC address, etc.
*/
IFQ_DEQUEUE(&ifp->if_snd, m);
/*
* Push the packet out to the card.
*/
smc91cxx_copy_tx_frame(sc, m);
#ifdef SMC91CXX_SW_PAD
/*
* Push out padding.
*/
while (pad > 1) {
bus_space_write_2(bst, bsh, DATA_REG_W, 0);
pad -= 2;
}
if (pad)
bus_space_write_1(bst, bsh, DATA_REG_B, 0);
#endif
/*
* Push out control byte and unused packet byte. The control byte
* is 0, meaning the packet is even lengthed and no special
* CRC handling is necessary.
*/
bus_space_write_2(bst, bsh, DATA_REG_W, 0);
/*
* Enable transmit interrupts and let the chip go. Set a watchdog
* in case we miss the interrupt.
*/
bus_space_write_1(bst, bsh, INTR_MASK_REG_B,
bus_space_read_1(bst, bsh, INTR_MASK_REG_B) |
IM_TX_INT | IM_TX_EMPTY_INT);
bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_ENQUEUE);
ifp->if_timer = 5;
#if NBPFILTER > 0
/* Hand off a copy to the bpf. */
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m);
#endif
ifp->if_opackets++;
m_freem(m);
readcheck:
/*
* Check for incoming pcakets. We don't want to overflow the small
* RX FIFO. If nothing has arrived, attempt to queue another
* transmit packet.
*/
if (bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W) & FIFO_REMPTY)
goto again;
}
/*
* Squirt a (possibly misaligned) mbuf to the device
*/
void
smc91cxx_copy_tx_frame(sc, m0)
struct smc91cxx_softc *sc;
struct mbuf *m0;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
struct mbuf *m;
int len, leftover;
u_int16_t dbuf;
u_int8_t *p;
#ifdef DIAGNOSTIC
u_int8_t *lim;
#endif
/* start out with no leftover data */
leftover = 0;
dbuf = 0;
/* Process the chain of mbufs */
for (m = m0; m != NULL; m = m->m_next) {
/*
* Process all of the data in a single mbuf.
*/
p = mtod(m, u_int8_t *);
len = m->m_len;
#ifdef DIAGNOSTIC
lim = p + len;
#endif
while (len > 0) {
if (leftover) {
/*
* Data left over (from mbuf or realignment).
* Buffer the next byte, and write it and
* the leftover data out.
*/
dbuf |= *p++ << 8;
len--;
bus_space_write_2(bst, bsh, DATA_REG_W, dbuf);
leftover = 0;
} else if ((long) p & 1) {
/*
* Misaligned data. Buffer the next byte.
*/
dbuf = *p++;
len--;
leftover = 1;
} else {
/*
* Aligned data. This is the case we like.
*
* Write-region out as much as we can, then
* buffer the remaining byte (if any).
*/
leftover = len & 1;
len &= ~1;
bus_space_write_multi_stream_2(bst, bsh,
DATA_REG_W, (u_int16_t *)p, len >> 1);
p += len;
if (leftover)
dbuf = *p++;
len = 0;
}
}
if (len < 0)
panic("smc91cxx_copy_tx_frame: negative len");
#ifdef DIAGNOSTIC
if (p != lim)
panic("smc91cxx_copy_tx_frame: p != lim");
#endif
}
if (leftover)
bus_space_write_1(bst, bsh, DATA_REG_B, dbuf);
}
/*
* Interrupt service routine.
*/
int
smc91cxx_intr(arg)
void *arg;
{
struct smc91cxx_softc *sc = arg;
struct ifnet *ifp = &sc->sc_ec.ec_if;
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
u_int8_t mask, interrupts, status;
u_int16_t packetno, tx_status, card_stats;
if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0 ||
!device_is_active(&sc->sc_dev))
return (0);
SMC_SELECT_BANK(sc, 2);
/*
* Obtain the current interrupt mask.
*/
mask = bus_space_read_1(bst, bsh, INTR_MASK_REG_B);
/*
* Get the set of interrupt which occurred and eliminate any
* which are not enabled.
*/
interrupts = bus_space_read_1(bst, bsh, INTR_STAT_REG_B);
status = interrupts & mask;
/* Ours? */
if (status == 0)
return (0);
/*
* It's ours; disable all interrupts while we process them.
*/
bus_space_write_1(bst, bsh, INTR_MASK_REG_B, 0);
/*
* Receive overrun interrupts.
*/
if (status & IM_RX_OVRN_INT) {
bus_space_write_1(bst, bsh, INTR_ACK_REG_B, IM_RX_OVRN_INT);
ifp->if_ierrors++;
}
/*
* Receive interrupts.
*/
if (status & IM_RCV_INT) {
#if 1 /* DIAGNOSTIC */
packetno = bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W);
if (packetno & FIFO_REMPTY) {
printf("%s: receive interrupt on empty fifo\n",
sc->sc_dev.dv_xname);
goto out;
} else
#endif
smc91cxx_read(sc);
}
/*
* Memory allocation interrupts.
*/
if (status & IM_ALLOC_INT) {
/* Disable this interrupt. */
mask &= ~IM_ALLOC_INT;
/*
* Release the just-allocated memory. We will reallocate
* it through the normal start logic.
*/
while (bus_space_read_2(bst, bsh, MMU_CMD_REG_W) & MMUCR_BUSY)
/* XXX bound this loop! */ ;
bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_FREEPKT);
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_timer = 0;
}
/*
* Transmit complete interrupt. Handle transmission error messages.
* This will only be called on error condition because of AUTO RELEASE
* mode.
*/
if (status & IM_TX_INT) {
bus_space_write_1(bst, bsh, INTR_ACK_REG_B, IM_TX_INT);
packetno = bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W) &
FIFO_TX_MASK;
/*
* Select this as the packet to read from.
*/
bus_space_write_1(bst, bsh, PACKET_NUM_REG_B, packetno);
/*
* Position the pointer to the beginning of the packet.
*/
bus_space_write_2(bst, bsh, POINTER_REG_W,
PTR_AUTOINC | PTR_READ /* | 0x0000 */);
/*
* Fetch the TX status word. This will be a copy of
* the EPH_STATUS_REG_W at the time of the transmission
* failure.
*/
tx_status = bus_space_read_2(bst, bsh, DATA_REG_W);
if (tx_status & EPHSR_TX_SUC)
printf("%s: successful packet caused TX interrupt?!\n",
sc->sc_dev.dv_xname);
else
ifp->if_oerrors++;
if (tx_status & EPHSR_LATCOL)
ifp->if_collisions++;
/*
* Some of these errors disable the transmitter; reenable it.
*/
SMC_SELECT_BANK(sc, 0);
#ifdef SMC91CXX_SW_PAD
bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, TCR_ENABLE);
#else
bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W,
TCR_ENABLE | TCR_PAD_ENABLE);
#endif
/*
* Kill the failed packet and wait for the MMU to unbusy.
*/
SMC_SELECT_BANK(sc, 2);
while (bus_space_read_2(bst, bsh, MMU_CMD_REG_W) & MMUCR_BUSY)
/* XXX bound this loop! */ ;
bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_FREEPKT);
ifp->if_timer = 0;
}
/*
* Transmit underrun interrupts. We use this opportunity to
* update transmit statistics from the card.
*/
if (status & IM_TX_EMPTY_INT) {
bus_space_write_1(bst, bsh, INTR_ACK_REG_B, IM_TX_EMPTY_INT);
/* Disable this interrupt. */
mask &= ~IM_TX_EMPTY_INT;
SMC_SELECT_BANK(sc, 0);
card_stats = bus_space_read_2(bst, bsh, COUNTER_REG_W);
/* Single collisions. */
ifp->if_collisions += card_stats & ECR_COLN_MASK;
/* Multiple collisions. */
ifp->if_collisions += (card_stats & ECR_MCOLN_MASK) >> 4;
SMC_SELECT_BANK(sc, 2);
ifp->if_timer = 0;
}
if (sc->sc_chipid == CHIP_91C111 && sc->sc_internal_phy &&
(status & IM_MD_INT)) {
/*
* Internal PHY status change
*/
mii_tick(&sc->sc_mii);
}
/*
* Other errors. Reset the interface.
*/
if (status & IM_EPH_INT) {
smc91cxx_stop(sc);
smc91cxx_init(sc);
}
/*
* Attempt to queue more packets for transmission.
*/
smc91cxx_start(ifp);
out:
/*
* Reenable the interrupts we wish to receive now that processing
* is complete.
*/
mask |= bus_space_read_1(bst, bsh, INTR_MASK_REG_B);
bus_space_write_1(bst, bsh, INTR_MASK_REG_B, mask);
#if NRND > 0
if (status)
rnd_add_uint32(&sc->rnd_source, status);
#endif
return (1);
}
/*
* Read a packet from the card and pass it up to the kernel.
* NOTE! WE EXPECT TO BE IN REGISTER WINDOW 2!
*/
void
smc91cxx_read(sc)
struct smc91cxx_softc *sc;
{
struct ifnet *ifp = &sc->sc_ec.ec_if;
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
struct ether_header *eh;
struct mbuf *m;
u_int16_t status, packetno, packetlen;
u_int8_t *data;
u_int32_t dr;
again:
/*
* Set data pointer to the beginning of the packet. Since
* PTR_RCV is set, the packet number will be found automatically
* in FIFO_PORTS_REG_W, FIFO_RX_MASK.
*/
bus_space_write_2(bst, bsh, POINTER_REG_W,
PTR_READ | PTR_RCV | PTR_AUTOINC /* | 0x0000 */);
/*
* First two words are status and packet length.
*/
if ((sc->sc_flags & SMC_FLAGS_32BIT_READ) == 0) {
status = bus_space_read_2(bst, bsh, DATA_REG_W);
packetlen = bus_space_read_2(bst, bsh, DATA_REG_W);
} else {
dr = bus_space_read_4(bst, bsh, DATA_REG_W);
#if BYTE_ORDER == LITTLE_ENDIAN
status = (u_int16_t)dr;
packetlen = (u_int16_t)(dr >> 16);
#else
packetlen = (u_int16_t)dr;
status = (u_int16_t)(dr >> 16);
#endif
}
packetlen &= RLEN_MASK;
/*
* The packet length includes 3 extra words: status, length,
* and an extra word that includes the control byte.
*/
packetlen -= 6;
/*
* Account for receive errors and discard.
*/
if (status & RS_ERRORS) {
ifp->if_ierrors++;
goto out;
}
/*
* Adjust for odd-length packet.
*/
if (status & RS_ODDFRAME)
packetlen++;
/*
* Allocate a header mbuf.
*/
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL)
goto out;
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = packetlen;
/*
* Always put the packet in a cluster.
* XXX should chain small mbufs if less than threshold.
*/
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
m_freem(m);
ifp->if_ierrors++;
printf("%s: can't allocate cluster for incoming packet\n",
sc->sc_dev.dv_xname);
goto out;
}
/*
* Pull the packet off the interface. Make sure the payload
* is aligned.
*/
if ((sc->sc_flags & SMC_FLAGS_32BIT_READ) == 0) {
m->m_data = (caddr_t) ALIGN(mtod(m, caddr_t) +
sizeof(struct ether_header)) - sizeof(struct ether_header);
eh = mtod(m, struct ether_header *);
data = mtod(m, u_int8_t *);
if (packetlen > 1)
bus_space_read_multi_stream_2(bst, bsh, DATA_REG_W,
(u_int16_t *)data, packetlen >> 1);
if (packetlen & 1) {
data += packetlen & ~1;
*data = bus_space_read_1(bst, bsh, DATA_REG_B);
}
} else {
u_int8_t *dp;
m->m_data = (caddr_t) ALIGN(mtod(m, caddr_t));
eh = mtod(m, struct ether_header *);
dp = data = mtod(m, u_int8_t *);
if (packetlen > 3)
bus_space_read_multi_stream_4(bst, bsh, DATA_REG_W,
(u_int32_t *)data, packetlen >> 2);
if (packetlen & 3) {
data += packetlen & ~3;
*((u_int32_t *)data) =
bus_space_read_stream_4(bst, bsh, DATA_REG_W);
}
}
ifp->if_ipackets++;
/*
* Make sure to behave as IFF_SIMPLEX in all cases.
* This is to cope with SMC91C92 (Megahertz XJ10BT), which
* loops back packets to itself on promiscuous mode.
* (should be ensured by chipset configuration)
*/
if ((ifp->if_flags & IFF_PROMISC) != 0) {
/*
* Drop packet looped back from myself.
*/
if (ether_cmp(eh->ether_shost, LLADDR(ifp->if_sadl)) == 0) {
m_freem(m);
goto out;
}
}
m->m_pkthdr.len = m->m_len = packetlen;
#if NBPFILTER > 0
/*
* Hand the packet off to bpf listeners.
*/
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m);
#endif
(*ifp->if_input)(ifp, m);
out:
/*
* Tell the card to free the memory occupied by this packet.
*/
while (bus_space_read_2(bst, bsh, MMU_CMD_REG_W) & MMUCR_BUSY)
/* XXX bound this loop! */ ;
bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_RELEASE);
/*
* Check for another packet.
*/
packetno = bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W);
if (packetno & FIFO_REMPTY)
return;
goto again;
}
/*
* Process an ioctl request.
*/
int
smc91cxx_ioctl(ifp, cmd, data)
struct ifnet *ifp;
u_long cmd;
caddr_t data;
{
struct smc91cxx_softc *sc = ifp->if_softc;
struct ifaddr *ifa = (struct ifaddr *)data;
struct ifreq *ifr = (struct ifreq *)data;
int s, error = 0;
s = splnet();
switch (cmd) {
case SIOCSIFADDR:
if ((error = smc91cxx_enable(sc)) != 0)
break;
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
smc91cxx_init(sc);
arp_ifinit(ifp, ifa);
break;
#endif
default:
smc91cxx_init(sc);
break;
}
break;
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_UP) == 0 &&
(ifp->if_flags & IFF_RUNNING) != 0) {
/*
* If interface is marked down and it is running,
* stop it.
*/
smc91cxx_stop(sc);
ifp->if_flags &= ~IFF_RUNNING;
smc91cxx_disable(sc);
} else if ((ifp->if_flags & IFF_UP) != 0 &&
(ifp->if_flags & IFF_RUNNING) == 0) {
/*
* If interface is marked up and it is stopped,
* start it.
*/
if ((error = smc91cxx_enable(sc)) != 0)
break;
smc91cxx_init(sc);
} else if ((ifp->if_flags & IFF_UP) != 0) {
/*
* Reset the interface to pick up changes in any
* other flags that affect hardware registers.
*/
smc91cxx_reset(sc);
}
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0) {
error = EIO;
break;
}
error = (cmd == SIOCADDMULTI) ?
ether_addmulti(ifr, &sc->sc_ec) :
ether_delmulti(ifr, &sc->sc_ec);
if (error == ENETRESET) {
/*
* Multicast list has changed; set the hardware
* filter accordingly.
*/
if (ifp->if_flags & IFF_RUNNING)
smc91cxx_reset(sc);
error = 0;
}
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii.mii_media, cmd);
break;
default:
error = EINVAL;
break;
}
splx(s);
return (error);
}
/*
* Reset the interface.
*/
void
smc91cxx_reset(sc)
struct smc91cxx_softc *sc;
{
int s;
s = splnet();
smc91cxx_stop(sc);
smc91cxx_init(sc);
splx(s);
}
/*
* Watchdog timer.
*/
void
smc91cxx_watchdog(ifp)
struct ifnet *ifp;
{
struct smc91cxx_softc *sc = ifp->if_softc;
log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname);
ifp->if_oerrors++;
smc91cxx_reset(sc);
}
/*
* Stop output on the interface.
*/
void
smc91cxx_stop(sc)
struct smc91cxx_softc *sc;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
/*
* Clear interrupt mask; disable all interrupts.
*/
SMC_SELECT_BANK(sc, 2);
bus_space_write_1(bst, bsh, INTR_MASK_REG_B, 0);
/*
* Disable transmitter and receiver.
*/
SMC_SELECT_BANK(sc, 0);
bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, 0);
bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, 0);
/*
* Cancel watchdog timer.
*/
sc->sc_ec.ec_if.if_timer = 0;
}
/*
* Enable power on the interface.
*/
int
smc91cxx_enable(sc)
struct smc91cxx_softc *sc;
{
if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0 && sc->sc_enable != NULL) {
if ((*sc->sc_enable)(sc) != 0) {
printf("%s: device enable failed\n",
sc->sc_dev.dv_xname);
return (EIO);
}
}
sc->sc_flags |= SMC_FLAGS_ENABLED;
return (0);
}
/*
* Disable power on the interface.
*/
void
smc91cxx_disable(sc)
struct smc91cxx_softc *sc;
{
if ((sc->sc_flags & SMC_FLAGS_ENABLED) != 0 && sc->sc_disable != NULL) {
(*sc->sc_disable)(sc);
sc->sc_flags &= ~SMC_FLAGS_ENABLED;
}
}
int
smc91cxx_activate(self, act)
struct device *self;
enum devact act;
{
struct smc91cxx_softc *sc = (struct smc91cxx_softc *)self;
int rv = 0, s;
s = splnet();
switch (act) {
case DVACT_ACTIVATE:
rv = EOPNOTSUPP;
break;
case DVACT_DEACTIVATE:
if_deactivate(&sc->sc_ec.ec_if);
break;
}
splx(s);
return (rv);
}
int
smc91cxx_detach(struct device *self, int flags)
{
struct smc91cxx_softc *sc = (struct smc91cxx_softc *)self;
struct ifnet *ifp = &sc->sc_ec.ec_if;
/* Succeed now if there's no work to do. */
if ((sc->sc_flags & SMC_FLAGS_ATTACHED) == 0)
return (0);
/* smc91cxx_disable() checks SMC_FLAGS_ENABLED */
smc91cxx_disable(sc);
/* smc91cxx_attach() never fails */
/* Delete all media. */
ifmedia_delete_instance(&sc->sc_mii.mii_media, IFM_INST_ANY);
#if NRND > 0
rnd_detach_source(&sc->rnd_source);
#endif
ether_ifdetach(ifp);
if_detach(ifp);
return (0);
}
u_int32_t
smc91cxx_mii_bitbang_read(self)
struct device *self;
{
struct smc91cxx_softc *sc = (void *) self;
/* We're already in bank 3. */
return (bus_space_read_2(sc->sc_bst, sc->sc_bsh, MGMT_REG_W));
}
void
smc91cxx_mii_bitbang_write(self, val)
struct device *self;
u_int32_t val;
{
struct smc91cxx_softc *sc = (void *) self;
/* We're already in bank 3. */
bus_space_write_2(sc->sc_bst, sc->sc_bsh, MGMT_REG_W, val);
}
int
smc91cxx_mii_readreg(self, phy, reg)
struct device *self;
int phy, reg;
{
struct smc91cxx_softc *sc = (void *) self;
int val;
SMC_SELECT_BANK(sc, 3);
val = mii_bitbang_readreg(self, &smc91cxx_mii_bitbang_ops, phy, reg);
SMC_SELECT_BANK(sc, 2);
return (val);
}
void
smc91cxx_mii_writereg(self, phy, reg, val)
struct device *self;
int phy, reg, val;
{
struct smc91cxx_softc *sc = (void *) self;
SMC_SELECT_BANK(sc, 3);
mii_bitbang_writereg(self, &smc91cxx_mii_bitbang_ops, phy, reg, val);
SMC_SELECT_BANK(sc, 2);
}
void
smc91cxx_statchg(self)
struct device *self;
{
struct smc91cxx_softc *sc = (struct smc91cxx_softc *)self;
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
int mctl;
SMC_SELECT_BANK(sc, 0);
mctl = bus_space_read_2(bst, bsh, TXMIT_CONTROL_REG_W);
if (sc->sc_mii.mii_media_active & IFM_FDX)
mctl |= TCR_SWFDUP;
else
mctl &= ~TCR_SWFDUP;
bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, mctl);
SMC_SELECT_BANK(sc, 2); /* back to operating window */
}
/*
* One second timer, used to tick the MII.
*/
void
smc91cxx_tick(arg)
void *arg;
{
struct smc91cxx_softc *sc = arg;
int s;
#ifdef DIAGNOSTIC
if ((sc->sc_flags & SMC_FLAGS_HAS_MII) == 0)
panic("smc91cxx_tick");
#endif
if (!device_is_active(&sc->sc_dev))
return;
s = splnet();
mii_tick(&sc->sc_mii);
splx(s);
callout_reset(&sc->sc_mii_callout, hz, smc91cxx_tick, sc);
}
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