/* $OpenBSD: if_bm.c,v 1.22 2007/04/22 22:31:14 deraadt Exp $ */
/* $NetBSD: if_bm.c,v 1.1 1999/01/01 01:27:52 tsubai Exp $ */
/*-
* Copyright (C) 1998, 1999 Tsubai Masanari. 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. The name of the author 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.
*/
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/timeout.h>
#include <sys/kernel.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <net/if_media.h>
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
#include <uvm/uvm_extern.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/mii/mii_bitbang.h>
#include <dev/ofw/openfirm.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <macppc/dev/dbdma.h>
#include <macppc/dev/if_bmreg.h>
#define BMAC_TXBUFS 2
#define BMAC_RXBUFS 16
#define BMAC_BUFLEN 2048
#define BMAC_BUFSZ ((BMAC_RXBUFS + BMAC_TXBUFS + 2) * BMAC_BUFLEN)
struct bmac_softc {
struct device sc_dev;
struct arpcom arpcom; /* per-instance network data */
struct timeout sc_tick_ch;
vaddr_t sc_regs;
bus_dma_tag_t sc_dmat;
bus_dmamap_t sc_bufmap;
bus_dma_segment_t sc_bufseg[1];
dbdma_regmap_t *sc_txdma, *sc_rxdma;
dbdma_command_t *sc_txcmd, *sc_rxcmd;
dbdma_t sc_rxdbdma, sc_txdbdma;
caddr_t sc_txbuf;
paddr_t sc_txbuf_pa;
caddr_t sc_rxbuf;
paddr_t sc_rxbuf_pa;
int sc_rxlast;
int sc_flags;
int sc_debug;
int txcnt_outstanding;
struct mii_data sc_mii;
};
#define BMAC_BMACPLUS 0x01
extern u_int *heathrow_FCR;
static __inline int bmac_read_reg(struct bmac_softc *, int);
static __inline void bmac_write_reg(struct bmac_softc *, int, int);
static __inline void bmac_set_bits(struct bmac_softc *, int, int);
static __inline void bmac_reset_bits(struct bmac_softc *, int, int);
static int bmac_match(struct device *, void *, void *);
static void bmac_attach(struct device *, struct device *, void *);
static void bmac_reset_chip(struct bmac_softc *);
static void bmac_init(struct bmac_softc *);
static void bmac_init_dma(struct bmac_softc *);
static int bmac_intr(void *);
static int bmac_rint(void *);
static void bmac_reset(struct bmac_softc *);
static void bmac_stop(struct bmac_softc *);
static void bmac_start(struct ifnet *);
static void bmac_transmit_packet(struct bmac_softc *, paddr_t, int);
static int bmac_put(struct bmac_softc *, caddr_t, struct mbuf *);
static struct mbuf *bmac_get(struct bmac_softc *, caddr_t, int);
static void bmac_watchdog(struct ifnet *);
static int bmac_ioctl(struct ifnet *, u_long, caddr_t);
static int bmac_mediachange(struct ifnet *);
static void bmac_mediastatus(struct ifnet *, struct ifmediareq *);
static void bmac_setladrf(struct bmac_softc *);
int bmac_mii_readreg(struct device *, int, int);
void bmac_mii_writereg(struct device *, int, int, int);
void bmac_mii_statchg(struct device *);
void bmac_mii_tick(void *);
u_int32_t bmac_mbo_read(struct device *);
void bmac_mbo_write(struct device *, u_int32_t);
struct cfattach bm_ca = {
sizeof(struct bmac_softc), bmac_match, bmac_attach
};
struct mii_bitbang_ops bmac_mbo = {
bmac_mbo_read, bmac_mbo_write,
{ MIFDO, MIFDI, MIFDC, MIFDIR, 0 }
};
struct cfdriver bm_cd = {
NULL, "bm", DV_IFNET
};
int
bmac_read_reg(struct bmac_softc *sc, int off)
{
return in16rb(sc->sc_regs + off);
}
void
bmac_write_reg(struct bmac_softc *sc, int off, int val)
{
out16rb(sc->sc_regs + off, val);
}
void
bmac_set_bits(struct bmac_softc *sc, int off, int val)
{
val |= bmac_read_reg(sc, off);
bmac_write_reg(sc, off, val);
}
void
bmac_reset_bits(struct bmac_softc *sc, int off, int val)
{
bmac_write_reg(sc, off, bmac_read_reg(sc, off) & ~val);
}
int
bmac_match(struct device *parent, void *cf, void *aux)
{
struct confargs *ca = aux;
if (ca->ca_nreg < 24 || ca->ca_nintr < 12)
return (0);
if (strcmp(ca->ca_name, "bmac") == 0) /* bmac */
return (1);
if (strcmp(ca->ca_name, "ethernet") == 0) /* bmac+ */
return (1);
return (0);
}
void
bmac_attach(struct device *parent, struct device *self, void *aux)
{
struct confargs *ca = aux;
struct bmac_softc *sc = (void *)self;
struct ifnet *ifp = &sc->arpcom.ac_if;
struct mii_data *mii = &sc->sc_mii;
u_char laddr[6];
int nseg, error;
timeout_set(&sc->sc_tick_ch, bmac_mii_tick, sc);
sc->sc_flags =0;
if (strcmp(ca->ca_name, "ethernet") == 0) {
sc->sc_flags |= BMAC_BMACPLUS;
}
ca->ca_reg[0] += ca->ca_baseaddr;
ca->ca_reg[2] += ca->ca_baseaddr;
ca->ca_reg[4] += ca->ca_baseaddr;
sc->sc_regs = (vaddr_t)mapiodev(ca->ca_reg[0], NBPG);
bmac_write_reg(sc, INTDISABLE, NoEventsMask);
if (OF_getprop(ca->ca_node, "local-mac-address", laddr, 6) == -1 &&
OF_getprop(ca->ca_node, "mac-address", laddr, 6) == -1) {
printf(": cannot get mac-address\n");
return;
}
bcopy(laddr, sc->arpcom.ac_enaddr, 6);
sc->sc_dmat = ca->ca_dmat;
sc->sc_txdma = mapiodev(ca->ca_reg[2], 0x100);
sc->sc_rxdma = mapiodev(ca->ca_reg[4], 0x100);
sc->sc_txdbdma = dbdma_alloc(sc->sc_dmat, BMAC_TXBUFS);
sc->sc_txcmd = sc->sc_txdbdma->d_addr;
sc->sc_rxdbdma = dbdma_alloc(sc->sc_dmat, BMAC_RXBUFS + 1);
sc->sc_rxcmd = sc->sc_rxdbdma->d_addr;
error = bus_dmamem_alloc(sc->sc_dmat, BMAC_BUFSZ,
PAGE_SIZE, 0, sc->sc_bufseg, 1, &nseg, BUS_DMA_NOWAIT);
if (error) {
printf(": cannot allocate buffers (%d)\n", error);
return;
}
error = bus_dmamem_map(sc->sc_dmat, sc->sc_bufseg, nseg,
BMAC_BUFSZ, &sc->sc_txbuf, BUS_DMA_NOWAIT);
if (error) {
printf(": cannot map buffers (%d)\n", error);
bus_dmamem_free(sc->sc_dmat, sc->sc_bufseg, 1);
return;
}
error = bus_dmamap_create(sc->sc_dmat, BMAC_BUFSZ, 1, BMAC_BUFSZ, 0,
BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &sc->sc_bufmap);
if (error) {
printf(": cannot create buffer dmamap (%d)\n", error);
bus_dmamem_unmap(sc->sc_dmat, sc->sc_txbuf, BMAC_BUFSZ);
bus_dmamem_free(sc->sc_dmat, sc->sc_bufseg, 1);
return;
}
error = bus_dmamap_load(sc->sc_dmat, sc->sc_bufmap, sc->sc_txbuf,
BMAC_BUFSZ, NULL, BUS_DMA_NOWAIT);
if (error) {
printf(": cannot load buffers dmamap (%d)\n", error);
bus_dmamap_destroy(sc->sc_dmat, sc->sc_bufmap);
bus_dmamem_unmap(sc->sc_dmat, sc->sc_txbuf, BMAC_BUFSZ);
bus_dmamem_free(sc->sc_dmat, sc->sc_bufseg, nseg);
return;
}
sc->sc_txbuf_pa = sc->sc_bufmap->dm_segs->ds_addr;
sc->sc_rxbuf = sc->sc_txbuf + BMAC_BUFLEN * BMAC_TXBUFS;
sc->sc_rxbuf_pa = sc->sc_txbuf_pa + BMAC_BUFLEN * BMAC_TXBUFS;
printf(" irq %d,%d: address %s\n", ca->ca_intr[0], ca->ca_intr[2],
ether_sprintf(laddr));
mac_intr_establish(parent, ca->ca_intr[0], IST_LEVEL, IPL_NET,
bmac_intr, sc, sc->sc_dev.dv_xname);
mac_intr_establish(parent, ca->ca_intr[2], IST_LEVEL, IPL_NET,
bmac_rint, sc, sc->sc_dev.dv_xname);
bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ);
ifp->if_softc = sc;
ifp->if_ioctl = bmac_ioctl;
ifp->if_start = bmac_start;
ifp->if_flags =
IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST;
ifp->if_watchdog = bmac_watchdog;
IFQ_SET_READY(&ifp->if_snd);
mii->mii_ifp = ifp;
mii->mii_readreg = bmac_mii_readreg;
mii->mii_writereg = bmac_mii_writereg;
mii->mii_statchg = bmac_mii_statchg;
ifmedia_init(&mii->mii_media, 0, bmac_mediachange, bmac_mediastatus);
mii_attach(&sc->sc_dev, mii, 0xffffffff, MII_PHY_ANY,
MII_OFFSET_ANY, 0);
/* Choose a default media. */
if (LIST_FIRST(&mii->mii_phys) == NULL) {
ifmedia_add(&mii->mii_media, IFM_ETHER|IFM_10_T, 0, NULL);
ifmedia_set(&mii->mii_media, IFM_ETHER|IFM_10_T);
} else
ifmedia_set(&mii->mii_media, IFM_ETHER|IFM_AUTO);
bmac_reset_chip(sc);
if_attach(ifp);
ether_ifattach(ifp);
}
/*
* Reset and enable bmac by heathrow FCR.
*/
void
bmac_reset_chip(struct bmac_softc *sc)
{
u_int v;
dbdma_reset(sc->sc_txdma);
dbdma_reset(sc->sc_rxdma);
v = in32rb(heathrow_FCR);
v |= EnetEnable;
out32rb(heathrow_FCR, v);
delay(50000);
/* assert reset */
v |= ResetEnetCell;
out32rb(heathrow_FCR, v);
delay(50000);
/* deassert reset */
v &= ~ResetEnetCell;
out32rb(heathrow_FCR, v);
delay(50000);
/* enable */
v |= EnetEnable;
out32rb(heathrow_FCR, v);
delay(50000);
/* make certain they stay set? */
out32rb(heathrow_FCR, v);
v = in32rb(heathrow_FCR);
}
void
bmac_init(struct bmac_softc *sc)
{
struct ifnet *ifp = &sc->arpcom.ac_if;
struct ether_header *eh;
caddr_t data;
int tb;
int i, bmcr;
u_short *p;
bmac_reset_chip(sc);
/* XXX */
bmcr = bmac_mii_readreg((struct device *)sc, 0, MII_BMCR);
bmcr &= ~BMCR_ISO;
bmac_mii_writereg((struct device *)sc, 0, MII_BMCR, bmcr);
bmac_write_reg(sc, RXRST, RxResetValue);
bmac_write_reg(sc, TXRST, TxResetBit);
/* Wait for reset completion. */
for (i = 1000; i > 0; i -= 10) {
if ((bmac_read_reg(sc, TXRST) & TxResetBit) == 0)
break;
delay(10);
}
if (i <= 0)
printf("%s: reset timeout\n", ifp->if_xname);
if (! (sc->sc_flags & BMAC_BMACPLUS))
bmac_set_bits(sc, XCVRIF, ClkBit|SerialMode|COLActiveLow);
tb = ppc_mftbl();
bmac_write_reg(sc, RSEED, tb);
bmac_set_bits(sc, XIFC, TxOutputEnable);
bmac_read_reg(sc, PAREG);
/* Reset various counters. */
bmac_write_reg(sc, NCCNT, 0);
bmac_write_reg(sc, NTCNT, 0);
bmac_write_reg(sc, EXCNT, 0);
bmac_write_reg(sc, LTCNT, 0);
bmac_write_reg(sc, FRCNT, 0);
bmac_write_reg(sc, LECNT, 0);
bmac_write_reg(sc, AECNT, 0);
bmac_write_reg(sc, FECNT, 0);
bmac_write_reg(sc, RXCV, 0);
/* Set tx fifo information. */
bmac_write_reg(sc, TXTH, 4); /* 4 octets before tx starts */
bmac_write_reg(sc, TXFIFOCSR, 0);
bmac_write_reg(sc, TXFIFOCSR, TxFIFOEnable);
/* Set rx fifo information. */
bmac_write_reg(sc, RXFIFOCSR, 0);
bmac_write_reg(sc, RXFIFOCSR, RxFIFOEnable);
/* Clear status register. */
bmac_read_reg(sc, STATUS);
bmac_write_reg(sc, HASH3, 0);
bmac_write_reg(sc, HASH2, 0);
bmac_write_reg(sc, HASH1, 0);
bmac_write_reg(sc, HASH0, 0);
/* Set MAC address. */
p = (u_short *)sc->arpcom.ac_enaddr;
bmac_write_reg(sc, MADD0, *p++);
bmac_write_reg(sc, MADD1, *p++);
bmac_write_reg(sc, MADD2, *p);
bmac_write_reg(sc, RXCFG,
RxCRCEnable | RxHashFilterEnable | RxRejectOwnPackets);
if (ifp->if_flags & IFF_PROMISC)
bmac_set_bits(sc, RXCFG, RxPromiscEnable);
bmac_init_dma(sc);
/* Configure Media. */
mii_mediachg(&sc->sc_mii);
/* Enable TX/RX */
bmac_set_bits(sc, RXCFG, RxMACEnable);
bmac_set_bits(sc, TXCFG, TxMACEnable);
bmac_write_reg(sc, INTDISABLE, NormalIntEvents);
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_timer = 0;
data = sc->sc_txbuf;
eh = (struct ether_header *)data;
bzero(data, sizeof(*eh) + ETHERMIN);
bcopy(sc->arpcom.ac_enaddr, eh->ether_dhost, ETHER_ADDR_LEN);
bcopy(sc->arpcom.ac_enaddr, eh->ether_shost, ETHER_ADDR_LEN);
bmac_transmit_packet(sc, sc->sc_txbuf_pa, sizeof(eh) + ETHERMIN);
bmac_start(ifp);
timeout_add(&sc->sc_tick_ch, hz);
}
void
bmac_init_dma(struct bmac_softc *sc)
{
dbdma_command_t *cmd = sc->sc_rxcmd;
int i;
dbdma_reset(sc->sc_txdma);
dbdma_reset(sc->sc_rxdma);
bzero(sc->sc_txcmd, BMAC_TXBUFS * sizeof(dbdma_command_t));
bzero(sc->sc_rxcmd, (BMAC_RXBUFS + 1) * sizeof(dbdma_command_t));
for (i = 0; i < BMAC_RXBUFS; i++) {
DBDMA_BUILD(cmd, DBDMA_CMD_IN_LAST, 0, BMAC_BUFLEN,
sc->sc_rxbuf_pa + BMAC_BUFLEN * i,
DBDMA_INT_ALWAYS, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER);
cmd++;
}
DBDMA_BUILD(cmd, DBDMA_CMD_NOP, 0, 0, 0,
DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_ALWAYS);
dbdma_st32(&cmd->d_cmddep, sc->sc_rxdbdma->d_paddr);
sc->sc_rxlast = 0;
dbdma_start(sc->sc_rxdma, sc->sc_rxdbdma);
}
int
bmac_intr(void *v)
{
struct bmac_softc *sc = v;
struct ifnet *ifp = &sc->arpcom.ac_if;
int stat;
#ifdef BMAC_DEBUG
printf("bmac_intr called\n");
#endif
stat = bmac_read_reg(sc, STATUS);
if (stat == 0)
return (0);
#ifdef BMAC_DEBUG
printf("bmac_intr status = 0x%x\n", stat);
#endif
if (stat & IntFrameSent) {
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_timer = 0;
ifp->if_opackets++;
bmac_start(ifp);
}
/* XXX should do more! */
return (1);
}
int
bmac_rint(void *v)
{
struct bmac_softc *sc = v;
struct ifnet *ifp = &sc->arpcom.ac_if;
struct mbuf *m;
dbdma_command_t *cmd;
int status, resid, count, datalen;
int i, n;
void *data;
#ifdef BMAC_DEBUG
printf("bmac_rint() called\n");
#endif
i = sc->sc_rxlast;
for (n = 0; n < BMAC_RXBUFS; n++, i++) {
if (i == BMAC_RXBUFS)
i = 0;
cmd = &sc->sc_rxcmd[i];
status = dbdma_ld16(&cmd->d_status);
resid = dbdma_ld16(&cmd->d_resid);
#ifdef BMAC_DEBUG
if (status != 0 && status != 0x8440 && status != 0x9440)
printf("bmac_rint status = 0x%x\n", status);
#endif
if ((status & DBDMA_CNTRL_ACTIVE) == 0) /* 0x9440 | 0x8440 */
continue;
count = dbdma_ld16(&cmd->d_count);
datalen = count - resid; /* 2 == framelen */
if (datalen < sizeof(struct ether_header)) {
printf("%s: short packet len = %d\n",
ifp->if_xname, datalen);
goto next;
}
DBDMA_BUILD_CMD(cmd, DBDMA_CMD_STOP, 0, 0, 0, 0);
data = sc->sc_rxbuf + BMAC_BUFLEN * i;
/* XXX Sometimes bmac reads one extra byte. */
if (datalen == ETHER_MAX_LEN + 1)
datalen--;
/* Trim the CRC. */
datalen -= ETHER_CRC_LEN;
m = bmac_get(sc, data, datalen);
if (m == NULL) {
ifp->if_ierrors++;
goto next;
}
#if NBPFILTER > 0
/*
* Check if there's a BPF listener on this interface.
* If so, hand off the raw packet to BPF.
*/
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_IN);
#endif
ether_input_mbuf(ifp, m);
ifp->if_ipackets++;
next:
DBDMA_BUILD_CMD(cmd, DBDMA_CMD_IN_LAST, 0, DBDMA_INT_ALWAYS,
DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER);
cmd->d_status = 0;
cmd->d_resid = 0;
sc->sc_rxlast = i + 1;
}
dbdma_continue(sc->sc_rxdma);
return (1);
}
void
bmac_reset(struct bmac_softc *sc)
{
int s;
s = splnet();
bmac_init(sc);
splx(s);
}
void
bmac_stop(struct bmac_softc *sc)
{
struct ifnet *ifp = &sc->arpcom.ac_if;
int s;
s = splnet();
/* timeout */
timeout_del(&sc->sc_tick_ch);
mii_down(&sc->sc_mii);
/* Disable TX/RX. */
bmac_reset_bits(sc, TXCFG, TxMACEnable);
bmac_reset_bits(sc, RXCFG, RxMACEnable);
/* Disable all interrupts. */
bmac_write_reg(sc, INTDISABLE, NoEventsMask);
dbdma_stop(sc->sc_txdma);
dbdma_stop(sc->sc_rxdma);
ifp->if_flags &= ~(IFF_UP | IFF_RUNNING);
ifp->if_timer = 0;
splx(s);
}
void
bmac_start(struct ifnet *ifp)
{
struct bmac_softc *sc = ifp->if_softc;
struct mbuf *m;
int tlen;
if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
return;
while (1) {
if (ifp->if_flags & IFF_OACTIVE)
return;
IFQ_DEQUEUE(&ifp->if_snd, m);
if (m == 0)
break;
#if NBPFILTER > 0
/*
* If BPF is listening on this interface, let it see the
* packet before we commit it to the wire.
*/
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_OUT);
#endif
ifp->if_flags |= IFF_OACTIVE;
tlen = bmac_put(sc, sc->sc_txbuf, m);
/* 5 seconds to watch for failing to transmit */
ifp->if_timer = 5;
ifp->if_opackets++; /* # of pkts */
bmac_transmit_packet(sc, sc->sc_txbuf_pa, tlen);
}
}
void
bmac_transmit_packet(struct bmac_softc *sc, paddr_t pa, int len)
{
dbdma_command_t *cmd = sc->sc_txcmd;
DBDMA_BUILD(cmd, DBDMA_CMD_OUT_LAST, 0, len, pa,
DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER);
cmd++;
DBDMA_BUILD(cmd, DBDMA_CMD_STOP, 0, 0, 0,
DBDMA_INT_ALWAYS, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER);
dbdma_start(sc->sc_txdma, sc->sc_txdbdma);
}
int
bmac_put(struct bmac_softc *sc, caddr_t buff, struct mbuf *m)
{
struct mbuf *n;
int len, tlen = 0;
for (; m; m = n) {
len = m->m_len;
if (len == 0) {
MFREE(m, n);
continue;
}
bcopy(mtod(m, caddr_t), buff, len);
buff += len;
tlen += len;
MFREE(m, n);
}
if (tlen > NBPG)
panic("%s: putpacket packet overflow", sc->sc_dev.dv_xname);
return (tlen);
}
struct mbuf *
bmac_get(struct bmac_softc *sc, caddr_t pkt, int totlen)
{
struct mbuf *m;
struct mbuf *top, **mp;
int len;
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0)
return (0);
m->m_pkthdr.rcvif = &sc->arpcom.ac_if;
m->m_pkthdr.len = totlen;
len = MHLEN;
top = 0;
mp = ⊤
while (totlen > 0) {
if (top) {
MGET(m, M_DONTWAIT, MT_DATA);
if (m == 0) {
m_freem(top);
return (0);
}
len = MLEN;
}
if (totlen >= MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
m_free(m);
m_freem(top);
return (0);
}
len = MCLBYTES;
}
m->m_len = len = min(totlen, len);
bcopy(pkt, mtod(m, caddr_t), len);
pkt += len;
totlen -= len;
*mp = m;
mp = &m->m_next;
}
return (top);
}
void
bmac_watchdog(struct ifnet *ifp)
{
struct bmac_softc *sc = ifp->if_softc;
bmac_reset_bits(sc, RXCFG, RxMACEnable);
bmac_reset_bits(sc, TXCFG, TxMACEnable);
printf("%s: device timeout\n", ifp->if_xname);
ifp->if_oerrors++;
bmac_reset(sc);
}
int
bmac_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct bmac_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:
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
bmac_init(sc);
arp_ifinit(&sc->arpcom, ifa);
break;
#endif
default:
bmac_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, then
* stop it.
*/
bmac_stop(sc);
ifp->if_flags &= ~IFF_RUNNING;
} else if ((ifp->if_flags & IFF_UP) != 0 &&
(ifp->if_flags & IFF_RUNNING) == 0) {
/*
* If interface is marked up and it is stopped, then
* start it.
*/
bmac_init(sc);
} else {
/*
* Reset the interface to pick up changes in any other
* flags that affect hardware registers.
*/
/*bmac_stop(sc);*/
bmac_init(sc);
}
#ifdef BMAC_DEBUG
if (ifp->if_flags & IFF_DEBUG)
sc->sc_debug = 1;
else
sc->sc_debug = 0;
#endif
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
error = (cmd == SIOCADDMULTI) ?
ether_addmulti(ifr, &sc->arpcom) :
ether_delmulti(ifr, &sc->arpcom);
if (error == ENETRESET) {
/*
* Multicast list has changed; set the hardware filter
* accordingly.
*/
if (ifp->if_flags & IFF_RUNNING) {
bmac_init(sc);
bmac_setladrf(sc);
}
error = 0;
}
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii.mii_media, cmd);
break;
default:
error = EINVAL;
}
splx(s);
return (error);
}
int
bmac_mediachange(struct ifnet *ifp)
{
struct bmac_softc *sc = ifp->if_softc;
return mii_mediachg(&sc->sc_mii);
}
void
bmac_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct bmac_softc *sc = ifp->if_softc;
mii_pollstat(&sc->sc_mii);
ifmr->ifm_status = sc->sc_mii.mii_media_status;
ifmr->ifm_active = sc->sc_mii.mii_media_active;
}
/*
* Set up the logical address filter.
*/
void
bmac_setladrf(struct bmac_softc *sc)
{
struct ifnet *ifp = &sc->arpcom.ac_if;
struct ether_multi *enm;
struct ether_multistep step;
u_int32_t crc;
u_int16_t hash[4];
int x;
/*
* Set up multicast address filter by passing all multicast addresses
* through a crc generator, and then using the high order 6 bits as an
* index into the 64 bit logical address filter. The high order bit
* selects the word, while the rest of the bits select the bit within
* the word.
*/
if (ifp->if_flags & IFF_PROMISC) {
bmac_set_bits(sc, RXCFG, RxPromiscEnable);
return;
}
if (ifp->if_flags & IFF_ALLMULTI) {
hash[3] = hash[2] = hash[1] = hash[0] = 0xffff;
goto chipit;
}
hash[3] = hash[2] = hash[1] = hash[0] = 0;
ETHER_FIRST_MULTI(step, &sc->arpcom, enm);
while (enm != NULL) {
if (bcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) {
/*
* We must listen to a range of multicast addresses.
* For now, just accept all multicasts, rather than
* trying to set only those filter bits needed to match
* the range. (At this time, the only use of address
* ranges is for IP multicast routing, for which the
* range is big enough to require all bits set.)
*/
hash[3] = hash[2] = hash[1] = hash[0] = 0xffff;
ifp->if_flags |= IFF_ALLMULTI;
goto chipit;
}
crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN);
/* Just want the 6 most significant bits. */
crc >>= 26;
/* Set the corresponding bit in the filter. */
hash[crc >> 4] |= 1 << (crc & 0xf);
ETHER_NEXT_MULTI(step, enm);
}
ifp->if_flags &= ~IFF_ALLMULTI;
chipit:
bmac_write_reg(sc, HASH0, hash[0]);
bmac_write_reg(sc, HASH1, hash[1]);
bmac_write_reg(sc, HASH2, hash[2]);
bmac_write_reg(sc, HASH3, hash[3]);
x = bmac_read_reg(sc, RXCFG);
x &= ~RxPromiscEnable;
x |= RxHashFilterEnable;
bmac_write_reg(sc, RXCFG, x);
}
int
bmac_mii_readreg(struct device *dev, int phy, int reg)
{
return mii_bitbang_readreg(dev, &bmac_mbo, phy, reg);
}
void
bmac_mii_writereg(struct device *dev, int phy, int reg, int val)
{
mii_bitbang_writereg(dev, &bmac_mbo, phy, reg, val);
}
u_int32_t
bmac_mbo_read(struct device *dev)
{
struct bmac_softc *sc = (void *)dev;
return bmac_read_reg(sc, MIFCSR);
}
void
bmac_mbo_write(struct device *dev, u_int32_t val)
{
struct bmac_softc *sc = (void *)dev;
bmac_write_reg(sc, MIFCSR, val);
}
void
bmac_mii_statchg(struct device *dev)
{
struct bmac_softc *sc = (void *)dev;
int x;
/* Update duplex mode in TX configuration */
x = bmac_read_reg(sc, TXCFG);
if ((IFM_OPTIONS(sc->sc_mii.mii_media_active) & IFM_FDX) != 0)
x |= TxFullDuplex;
else
x &= ~TxFullDuplex;
bmac_write_reg(sc, TXCFG, x);
#ifdef BMAC_DEBUG
printf("bmac_mii_statchg 0x%x\n",
IFM_OPTIONS(sc->sc_mii.mii_media_active));
#endif
}
void
bmac_mii_tick(void *v)
{
struct bmac_softc *sc = v;
int s;
s = splnet();
mii_tick(&sc->sc_mii);
splx(s);
timeout_add(&sc->sc_tick_ch, hz);
}
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