/* $NetBSD: smc91cxx.c,v 1.108 2022/09/25 18:43:32 thorpej 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.
*
* 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 <
[email protected]>
* 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 derived from an SMC 91C90 driver
* written for NetBSD/amiga by Michael Hitch.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: smc91cxx.c,v 1.108 2022/09/25 18:43:32 thorpej Exp $");
#include "opt_inet.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/ioctl.h>
#include <sys/errno.h>
#include <sys/rndsource.h>
#include <sys/bus.h>
#include <sys/intr.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_ether.h>
#include <net/if_media.h>
#include <net/bpf.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
#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. */
static const int smc91cxx_media[] = {
IFM_ETHER | IFM_10_T,
IFM_ETHER | IFM_10_5,
};
#define NSMC91CxxMEDIA __arraycount(smc91cxx_media)
/*
* MII bit-bang glue.
*/
static uint32_t smc91cxx_mii_bitbang_read(device_t);
static void smc91cxx_mii_bitbang_write(device_t, uint32_t);
static 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 */
static int smc91cxx_mii_readreg(device_t, int, int, uint16_t *);
static int smc91cxx_mii_writereg(device_t, int, int, uint16_t);
static void smc91cxx_statchg(struct ifnet *);
static void smc91cxx_tick(void *);
static int smc91cxx_mediachange(struct ifnet *);
static void smc91cxx_mediastatus(struct ifnet *, struct ifmediareq *);
static int smc91cxx_set_media(struct smc91cxx_softc *, int);
static void smc91cxx_init(struct smc91cxx_softc *);
static void smc91cxx_read(struct smc91cxx_softc *);
static void smc91cxx_reset(struct smc91cxx_softc *);
static void smc91cxx_start(struct ifnet *);
static uint8_t smc91cxx_copy_tx_frame(struct smc91cxx_softc *, struct mbuf *);
static void smc91cxx_stop(struct smc91cxx_softc *);
static void smc91cxx_watchdog(struct ifnet *);
static int smc91cxx_ioctl(struct ifnet *, u_long, void *);
static int smc91cxx_enable(struct smc91cxx_softc *);
static void smc91cxx_disable(struct smc91cxx_softc *);
static inline int ether_cmp(const void *, const void *);
static inline int
ether_cmp(const void *va, const void *vb)
{
const uint8_t *a = va;
const uint8_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]));
}
static inline void
smc91cxx_intr_mask_write(bus_space_tag_t bst, bus_space_handle_t bsh,
uint8_t mask)
{
KDASSERT((mask & IM_ERCV_INT) == 0);
#ifdef SMC91CXX_NO_BYTE_WRITE
bus_space_write_2(bst, bsh, INTR_STAT_REG_B, mask << 8);
#else
bus_space_write_1(bst, bsh, INTR_MASK_REG_B, mask);
#endif
KDASSERT(!(bus_space_read_1(bst, bsh, INTR_MASK_REG_B) & IM_ERCV_INT));
}
static inline void
smc91cxx_intr_ack_write(bus_space_tag_t bst, bus_space_handle_t bsh,
uint8_t ack, uint8_t mask)
{
#ifdef SMC91CXX_NO_BYTE_WRITE
bus_space_write_2(bst, bsh, INTR_ACK_REG_B, ack | (mask << 8));
#else
bus_space_write_1(bst, bsh, INTR_ACK_REG_B, ack);
#endif
KDASSERT(!(bus_space_read_1(bst, bsh, INTR_MASK_REG_B) & IM_ERCV_INT));
}
void
smc91cxx_attach(struct smc91cxx_softc *sc, uint8_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 mii_data *mii = &sc->sc_mii;
struct ifmedia *ifm = &mii->mii_media;
const char *idstr;
uint32_t miicapabilities;
uint16_t tmp;
uint8_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_dev(sc->sc_dev,
"failed to detect chip, bsr=%04x\n", 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_dev(sc->sc_dev, "");
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_dev(sc->sc_dev, "MAC address %s, ",
ether_sprintf(myea));
/* Initialize the ifnet structure. */
strlcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ);
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_MULTICAST;
IFQ_SET_READY(&ifp->if_snd);
/* Attach the interface. */
if_attach(ifp);
if_deferred_start_init(ifp, NULL);
ether_ifattach(ifp, myea);
/*
* Initialize our media structures and MII info. We will
* probe the MII if we are on the SMC91Cxx
*/
mii->mii_ifp = ifp;
mii->mii_readreg = smc91cxx_mii_readreg;
mii->mii_writereg = smc91cxx_mii_writereg;
mii->mii_statchg = smc91cxx_statchg;
sc->sc_ec.ec_mii = mii;
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);
/*FALLTHROUGH*/
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, mii, miicapabilities,
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);
}
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;
}
rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev),
RND_TYPE_NET, RND_FLAG_DEFAULT);
callout_init(&sc->sc_mii_callout, 0);
callout_setfunc(&sc->sc_mii_callout, smc91cxx_tick, sc);
/* The attach is successful. */
sc->sc_flags |= SMC_FLAGS_ATTACHED;
}
/*
* Change media according to request.
*/
static int
smc91cxx_mediachange(struct ifnet *ifp)
{
struct smc91cxx_softc *sc = ifp->if_softc;
return smc91cxx_set_media(sc, sc->sc_mii.mii_media.ifm_media);
}
static int
smc91cxx_set_media(struct smc91cxx_softc *sc, int media)
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
uint16_t tmp;
int rc;
/*
* 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) == 0 ||
(rc = mii_mediachg(&sc->sc_mii)) == ENXIO)
rc = 0;
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 rc;
}
/*
* Notify the world which media we're using.
*/
static void
smc91cxx_mediastatus(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;
uint16_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.
*/
static void
smc91cxx_init(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;
uint16_t tmp;
const uint8_t *enaddr;
int s, i;
s = splnet();
/*
* This resets the registers mostly to defaults, but doesn't
* affect the EEPROM. The longest reset recovery time of those devices
* supported is the 91C111. Section 7.8 of its datasheet asks for 50ms.
*/
SMC_SELECT_BANK(sc, 0);
bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, RCR_SOFTRESET);
delay(5);
bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, 0);
delay(50000);
bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, 0);
/* Set the Ethernet address. */
SMC_SELECT_BANK(sc, 1);
enaddr = (const uint8_t *)CLLADDR(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);
sc->sc_txpacketno = ARR_FAILED;
for (;;) {
tmp = bus_space_read_2(bst, bsh, MMU_CMD_REG_W);
if (tmp == 0xffff) {
/* Card went away! */
splx(s);
return;
}
if ((tmp & MMUCR_BUSY) == 0)
break;
}
/* Disable all interrupts. */
smc91cxx_intr_mask_write(bst, bsh, 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);
sc->sc_intmask = IM_EPH_INT | IM_RX_OVRN_INT | IM_RCV_INT;
if (sc->sc_chipid == CHIP_91C111 && sc->sc_internal_phy) {
sc->sc_intmask |= IM_MD_INT;
}
smc91cxx_intr_mask_write(bst, bsh, sc->sc_intmask);
/* 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_schedule(&sc->sc_mii_callout, hz);
}
/* Attempt to start any pending transmission. */
smc91cxx_start(ifp);
splx(s);
}
/*
* Start output on an interface.
* Must be called at splnet or interrupt level.
*/
static void
smc91cxx_start(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;
uint16_t length, npages;
uint16_t oddbyte;
uint8_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;
/*
* We drop packets that are too large. Perhaps we should
* truncate them instead?
*/
if (len > (ETHER_MAX_LEN - ETHER_CRC_LEN)) {
printf("%s: large packet discarded\n",
device_xname(sc->sc_dev));
if_statinc(ifp, if_oerrors);
IFQ_DEQUEUE(&ifp->if_snd, m);
m_freem(m);
goto readcheck;
}
pad = 0;
#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 & ~1) + 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;
if (__predict_false((sc->sc_txpacketno & ARR_FAILED) == 0)) {
packetno = sc->sc_txpacketno;
sc->sc_txpacketno = ARR_FAILED;
} else {
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 requested 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.
*/
sc->sc_intmask |= IM_ALLOC_INT;
smc91cxx_intr_mask_write(bst, bsh, sc->sc_intmask);
ifp->if_timer = 5;
ifp->if_flags |= IFF_OACTIVE;
return;
}
/* We have a packet number - set the data window. */
bus_space_write_2(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. The copying function only does
* whole words and returns the straggling byte (if any).
*/
oddbyte = smc91cxx_copy_tx_frame(sc, m);
#ifdef SMC91CXX_SW_PAD
if (pad > 1 && (pad & 1)) {
bus_space_write_2(bst, bsh, DATA_REG_W, oddbyte);
oddbyte = 0;
pad -= 1;
}
/* Push out padding. */
while (pad > 1) {
bus_space_write_2(bst, bsh, DATA_REG_W, 0);
pad -= 2;
}
#endif
/*
* Push out control byte and unused packet byte. The control byte
* denotes whether this is an odd or even length packet, and that
* no special CRC handling is necessary.
*/
bus_space_write_2(bst, bsh, DATA_REG_W,
oddbyte | ((length & 1) ? (CTLB_ODD << 8) : 0));
/*
* Enable transmit interrupts and let the chip go. Set a watchdog
* in case we miss the interrupt.
*/
sc->sc_intmask |= IM_TX_INT | IM_TX_EMPTY_INT;
smc91cxx_intr_mask_write(bst, bsh, sc->sc_intmask);
bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_ENQUEUE);
ifp->if_timer = 5;
/* Hand off a copy to the bpf. */
bpf_mtap(ifp, m, BPF_D_OUT);
if_statinc(ifp, if_opackets);
m_freem(m);
readcheck:
/*
* Check for incoming packets. 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
*/
static uint8_t
smc91cxx_copy_tx_frame(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;
uint16_t dbuf;
uint8_t *p;
#ifdef DIAGNOSTIC
uint8_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, uint8_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, (uint16_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
}
return dbuf;
}
/*
* Interrupt service routine.
*/
int
smc91cxx_intr(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;
uint8_t mask, interrupts, status;
uint16_t packetno, tx_status, card_stats;
uint16_t v;
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 status and mask. */
v = bus_space_read_2(bst, bsh, INTR_STAT_REG_B);
/*
* Get the set of interrupt which occurred and eliminate any
* which are not enabled.
*/
mask = v >> 8;
interrupts = v & 0xff;
KDASSERT(mask == sc->sc_intmask);
status = interrupts & mask;
/* Ours? */
if (status == 0)
return 0;
/* It's ours; disable all interrupts while we process them. */
smc91cxx_intr_mask_write(bst, bsh, 0);
/* Receive overrun interrupts. */
if (status & IM_RX_OVRN_INT) {
smc91cxx_intr_ack_write(bst, bsh, IM_RX_OVRN_INT, 0);
if_statinc(ifp, if_ierrors);
}
/* Receive interrupts. */
if (status & IM_RCV_INT) {
smc91cxx_read(sc);
}
/* Memory allocation interrupts. */
if (status & IM_ALLOC_INT) {
/* Disable this interrupt. */
mask &= ~IM_ALLOC_INT;
sc->sc_intmask &= ~IM_ALLOC_INT;
/* Save allocated packet number for use in start */
packetno = bus_space_read_1(bst, bsh, ALLOC_RESULT_REG_B);
KASSERT(sc->sc_txpacketno & ARR_FAILED);
sc->sc_txpacketno = packetno;
/* We can transmit again! */
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) {
smc91cxx_intr_ack_write(bst, bsh, IM_TX_INT, 0);
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_2(bst, bsh, PACKET_NUM_REG_B, packetno);
/*
* Position the pointer to the beginning of the packet, wait
* for preload.
*/
bus_space_write_2(bst, bsh, POINTER_REG_W,
PTR_AUTOINC | PTR_READ /* | 0x0000 */);
delay(1);
/*
* 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) {
static struct timeval txsuc_last;
static int txsuc_count;
if (ppsratecheck(&txsuc_last, &txsuc_count, 1))
printf("%s: successful packet caused TX"
" interrupt?!\n", device_xname(sc->sc_dev));
} else
if_statinc(ifp, if_oerrors);
if (tx_status & EPHSR_LATCOL)
if_statinc(ifp, if_collisions);
/* Disable this interrupt (start will reenable if needed). */
mask &= ~IM_TX_INT;
sc->sc_intmask &= ~IM_TX_INT;
/*
* 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) {
smc91cxx_intr_ack_write(bst, bsh, IM_TX_EMPTY_INT, 0);
/* Disable this interrupt. */
mask &= ~IM_TX_EMPTY_INT;
sc->sc_intmask &= ~IM_TX_EMPTY_INT;
SMC_SELECT_BANK(sc, 0);
card_stats = bus_space_read_2(bst, bsh, COUNTER_REG_W);
/* Single collisions. */
if (card_stats & ECR_COLN_MASK)
if_statadd(ifp, if_collisions,
card_stats & ECR_COLN_MASK);
/* Multiple collisions. */
if ((card_stats & ECR_MCOLN_MASK) >> 4)
if_statadd(ifp, if_collisions,
(card_stats & ECR_MCOLN_MASK) >> 4);
SMC_SELECT_BANK(sc, 2);
ifp->if_timer = 0;
}
/* Internal PHY status change */
if (sc->sc_chipid == CHIP_91C111 && sc->sc_internal_phy &&
(status & IM_MD_INT)) {
/* Internal PHY status change */
smc91cxx_intr_ack_write(bst, bsh, IM_MD_INT, 0);
mii_pollstat(&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. */
if_schedule_deferred_start(ifp);
/*
* Reenable the interrupts we wish to receive now that processing
* is complete.
*/
mask |= sc->sc_intmask;
smc91cxx_intr_mask_write(bst, bsh, mask);
if (status)
rnd_add_uint32(&sc->rnd_source, status);
return 1;
}
/*
* Read a packet from the card and pass it up to the kernel.
* NOTE! WE EXPECT TO BE IN REGISTER WINDOW 2!
*/
static void
smc91cxx_read(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;
uint16_t status, packetno, packetlen;
uint8_t *data;
uint32_t dr;
bool first = true;
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.
*/
packetno = bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W);
if (packetno & FIFO_REMPTY) {
if (first) {
aprint_error_dev(sc->sc_dev,
"receive interrupt on empty fifo\n");
}
return;
}
first = false;
bus_space_write_2(bst, bsh, POINTER_REG_W,
PTR_READ | PTR_RCV | PTR_AUTOINC /* | 0x0000 */);
delay(1);
/* First two words are status and packet length. */
dr = bus_space_read_4(bst, bsh, DATA_REG_W);
status = (uint16_t)dr;
packetlen = (uint16_t)(dr >> 16);
packetlen &= RLEN_MASK;
if (packetlen < ETHER_MIN_LEN - ETHER_CRC_LEN + 6 || packetlen > 1534) {
if_statinc(ifp, if_ierrors);
goto out;
}
/*
* 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) {
if_statinc(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_set_rcvif(m, 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);
if_statinc(ifp, if_ierrors);
aprint_error_dev(sc->sc_dev,
"can't allocate cluster for incoming packet\n");
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 = (char *)ALIGN(mtod(m, char *) +
sizeof(struct ether_header)) - sizeof(struct ether_header);
eh = mtod(m, struct ether_header *);
data = mtod(m, uint8_t *);
KASSERT(trunc_page((uintptr_t)data) ==
trunc_page((uintptr_t)data + packetlen - 1));
if (packetlen > 1)
bus_space_read_multi_stream_2(bst, bsh, DATA_REG_W,
(uint16_t *)data, packetlen >> 1);
if (packetlen & 1) {
data += packetlen & ~1;
*data = bus_space_read_1(bst, bsh, DATA_REG_B);
}
} else {
m->m_data = (void *)ALIGN(mtod(m, void *));
eh = mtod(m, struct ether_header *);
data = mtod(m, uint8_t *);
KASSERT(trunc_page((uintptr_t)data) ==
trunc_page((uintptr_t)data + packetlen - 1));
if (packetlen > 3)
bus_space_read_multi_stream_4(bst, bsh, DATA_REG_W,
(uint32_t *)data, packetlen >> 2);
if (packetlen & 3) {
data += packetlen & ~3;
*((uint32_t *)data) =
bus_space_read_stream_4(bst, bsh, DATA_REG_W);
}
}
/*
* 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, CLLADDR(ifp->if_sadl)) == 0) {
m_freem(m);
goto out;
}
}
m->m_pkthdr.len = m->m_len = packetlen;
if_percpuq_enqueue(ifp->if_percpuq, 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. */
goto again;
}
/*
* Process an ioctl request.
*/
static int
smc91cxx_ioctl(struct ifnet *ifp, u_long cmd, void *data)
{
struct smc91cxx_softc *sc = ifp->if_softc;
struct ifaddr *ifa = (struct ifaddr *)data;
int s, error = 0;
s = splnet();
switch (cmd) {
case SIOCINITIFADDR:
if ((error = smc91cxx_enable(sc)) != 0)
break;
ifp->if_flags |= IFF_UP;
smc91cxx_init(sc);
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
arp_ifinit(ifp, ifa);
break;
#endif
default:
break;
}
break;
case SIOCSIFFLAGS:
if ((error = ifioctl_common(ifp, cmd, data)) != 0)
break;
/* XXX re-use ether_ioctl() */
switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) {
case IFF_RUNNING:
/*
* If interface is marked down and it is running,
* stop it.
*/
smc91cxx_stop(sc);
ifp->if_flags &= ~IFF_RUNNING;
smc91cxx_disable(sc);
break;
case IFF_UP:
/*
* If interface is marked up and it is stopped,
* start it.
*/
if ((error = smc91cxx_enable(sc)) != 0)
break;
smc91cxx_init(sc);
break;
case IFF_UP|IFF_RUNNING:
/*
* Reset the interface to pick up changes in any
* other flags that affect hardware registers.
*/
smc91cxx_reset(sc);
break;
case 0:
break;
}
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0) {
error = EIO;
break;
}
/* FALLTHROUGH */
default:
if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) {
/*
* Multicast list has changed; set the hardware
* filter accordingly.
*/
if (ifp->if_flags & IFF_RUNNING)
smc91cxx_reset(sc);
error = 0;
}
break;
}
splx(s);
return error;
}
/*
* Reset the interface.
*/
static void
smc91cxx_reset(struct smc91cxx_softc *sc)
{
int s;
s = splnet();
smc91cxx_stop(sc);
smc91cxx_init(sc);
splx(s);
}
/*
* Watchdog timer.
*/
static void
smc91cxx_watchdog(struct ifnet *ifp)
{
struct smc91cxx_softc *sc = ifp->if_softc;
log(LOG_ERR, "%s: device timeout\n", device_xname(sc->sc_dev));
if_statinc(ifp, if_oerrors);
smc91cxx_reset(sc);
}
/*
* Stop output on the interface.
*/
static void
smc91cxx_stop(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);
smc91cxx_intr_mask_write(bst, bsh, 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.
*/
static int
smc91cxx_enable(struct smc91cxx_softc *sc)
{
if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0 && sc->sc_enable != NULL) {
if ((*sc->sc_enable)(sc) != 0) {
aprint_error_dev(sc->sc_dev, "device enable failed\n");
return EIO;
}
}
sc->sc_flags |= SMC_FLAGS_ENABLED;
return 0;
}
/*
* Disable power on the interface.
*/
static void
smc91cxx_disable(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(device_t self, enum devact act)
{
struct smc91cxx_softc *sc = device_private(self);
switch (act) {
case DVACT_DEACTIVATE:
if_deactivate(&sc->sc_ec.ec_if);
return 0;
default:
return EOPNOTSUPP;
}
}
int
smc91cxx_detach(device_t self, int flags)
{
struct smc91cxx_softc *sc = device_private(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 */
rnd_detach_source(&sc->rnd_source);
ether_ifdetach(ifp);
if_detach(ifp);
/* Delete all media. */
ifmedia_fini(&sc->sc_mii.mii_media);
return 0;
}
static uint32_t
smc91cxx_mii_bitbang_read(device_t self)
{
struct smc91cxx_softc *sc = device_private(self);
/* We're already in bank 3. */
return bus_space_read_2(sc->sc_bst, sc->sc_bsh, MGMT_REG_W);
}
static void
smc91cxx_mii_bitbang_write(device_t self, uint32_t val)
{
struct smc91cxx_softc *sc = device_private(self);
/* We're already in bank 3. */
bus_space_write_2(sc->sc_bst, sc->sc_bsh, MGMT_REG_W, val);
}
static int
smc91cxx_mii_readreg(device_t self, int phy, int reg, uint16_t *val)
{
struct smc91cxx_softc *sc = device_private(self);
int rv;
SMC_SELECT_BANK(sc, 3);
rv = mii_bitbang_readreg(self, &smc91cxx_mii_bitbang_ops, phy, reg,
val);
SMC_SELECT_BANK(sc, 2);
return rv;
}
static int
smc91cxx_mii_writereg(device_t self, int phy, int reg, uint16_t val)
{
struct smc91cxx_softc *sc = device_private(self);
int rv;
SMC_SELECT_BANK(sc, 3);
rv = mii_bitbang_writereg(self, &smc91cxx_mii_bitbang_ops, phy, reg,
val);
SMC_SELECT_BANK(sc, 2);
return rv;
}
static void
smc91cxx_statchg(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;
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.
*/
static void
smc91cxx_tick(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_schedule(&sc->sc_mii_callout, hz);
}
