Replace the ed driver.

ec is used for 3c503 cards, we for SMC/WD 80x3 series and ne for ne[12]00.
This also adds ne2k pnp support.

1 files changed, 819 insertions, 0 deletions

diff --git a/sys/dev/isa/if_ec.c b/sys/dev/isa/if_ec.c
new file mode 100644
index 00000000000..0cf18c389cf
--- /dev/null
+++ b/sys/dev/isa/if_ec.c
@@ -0,0 +1,819 @@
+/*	$OpenBSD: if_ec.c,v 1.1 1998/09/22 06:33:18 fgsch Exp $	*/
+/*	$NetBSD: if_ec.c,v 1.9 1998/07/05 06:49:12 jonathan Exp $	*/
+
+/*-
+ * Copyright (c) 1997, 1998 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.
+ */
+
+/*
+ * Device driver for National Semiconductor DS8390/WD83C690 based ethernet
+ * adapters.
+ *
+ * Copyright (c) 1994, 1995 Charles M. Hannum.  All rights reserved.
+ *
+ * Copyright (C) 1993, David Greenman.  This software may be used, modified,
+ * copied, distributed, and sold, in both source and binary form provided that
+ * the above copyright and these terms are retained.  Under no circumstances is
+ * the author responsible for the proper functioning of this software, nor does
+ * the author assume any responsibility for damages incurred with its use.
+ */
+
+/*
+ * Device driver for the 3Com Etherlink II (3c503).
+ */
+
+#include "bpfilter.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/socket.h>
+#include <sys/mbuf.h>
+#include <sys/syslog.h>
+
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <net/if_types.h>
+#include <net/if_media.h>
+
+#ifdef __NetBSD__
+#include <net/if_ether.h>
+#endif
+
+#ifdef INET
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h> 
+#include <netinet/ip.h>
+#ifdef __NetBSD__
+#include <netinet/if_inarp.h> 
+#else
+#include <netinet/if_ether.h>
+#endif
+#endif 
+
+#ifdef NS
+#include <netns/ns.h>
+#include <netns/ns_if.h>
+#endif
+
+#if NBPFILTER > 0
+#include <net/bpf.h>
+#include <net/bpfdesc.h>
+#endif
+
+#include <machine/bus.h>
+#include <machine/intr.h>
+
+#include <dev/isa/isareg.h>
+#include <dev/isa/isavar.h>
+
+#include <dev/ic/dp8390reg.h>
+#include <dev/ic/dp8390var.h>
+
+#include <dev/isa/if_ecreg.h>
+
+struct ec_softc {
+	struct dp8390_softc sc_dp8390;
+
+	bus_space_tag_t sc_asict;	/* space tag for ASIC */
+	bus_space_handle_t sc_asich;	/* space handle for ASIC */
+
+	int sc_16bitp;			/* are we 16 bit? */
+
+	void *sc_ih;			/* interrupt handle */
+};
+
+int	ec_probe __P((struct device *, void *, void *));
+void	ec_attach __P((struct device *, struct device *, void *));
+
+struct cfattach ec_ca = {
+	sizeof(struct ec_softc), ec_probe, ec_attach
+};
+
+int	ec_set_media __P((struct ec_softc *, int));
+
+int	ec_mediachange __P((struct dp8390_softc *));
+void	ec_mediastatus __P((struct dp8390_softc *, struct ifmediareq *));
+
+void	ec_init_card __P((struct dp8390_softc *));
+int	ec_write_mbuf __P((struct dp8390_softc *, struct mbuf *, int));
+int	ec_ring_copy __P((struct dp8390_softc *, int, caddr_t, u_short));
+void	ec_read_hdr __P((struct dp8390_softc *, int, struct dp8390_ring *));
+int	ec_fake_test_mem __P((struct dp8390_softc *));
+int	ec_test_mem __P((struct dp8390_softc *));
+
+__inline void ec_readmem __P((struct ec_softc *, int, u_int8_t *, int));
+
+static const int ec_iobase[] = {
+	0x2e0, 0x2a0, 0x280, 0x250, 0x350, 0x330, 0x310, 0x300,
+};
+#define	NEC_IOBASE	(sizeof(ec_iobase) / sizeof(ec_iobase[0]))
+
+static const int ec_membase[] = {
+	MADDRUNK, MADDRUNK, MADDRUNK, MADDRUNK, 0xc8000, 0xcc000,
+	0xd8000, 0xdc000,
+};
+#define	NEC_MEMBASE	(sizeof(ec_membase) / sizeof(ec_membase[0]))
+
+int ec_media[] = {
+	IFM_ETHER|IFM_10_2,
+	IFM_ETHER|IFM_10_5,
+};
+#define	NEC_MEDIA	(sizeof(ec_media) / sizeof(ec_media[0]))
+#define	EC_DEFMEDIA	(IFM_ETHER|IFM_10_2)
+
+struct cfdriver ec_cd = {
+	NULL, "ec", DV_IFNET
+};
+
+int
+ec_probe(parent, match, aux)
+	struct device *parent;
+	void *match, *aux;
+{
+	struct isa_attach_args *ia = aux;
+	bus_space_tag_t nict, asict, memt;
+	bus_space_handle_t nich, asich, memh;
+	bus_size_t memsize;
+	int nich_valid, asich_valid, memh_valid;
+	int i, rv = 0;
+	u_int8_t x;
+
+	nict = asict = ia->ia_iot;
+	memt = ia->ia_memt;
+
+	nich_valid = asich_valid = memh_valid = 0;
+
+	/*
+	 * Hmm, a 16-bit card has 16k of memory, but only an 8k window
+	 * to it.
+	 */
+	memsize = 8192;
+
+	/* Disallow wildcarded i/o addresses. */
+	if (ia->ia_iobase == -1 /* ISACF_PORT_DEFAULT */)
+		return (0);
+
+	/* Disallow wildcarded mem address. */
+	if (ia->ia_maddr == -1 /* ISACF_IOMEM_DEFAULT */)
+		return (0);
+
+	/* Validate the i/o base. */
+	for (i = 0; i < NEC_IOBASE; i++)
+		if (ia->ia_iobase == ec_iobase[i])
+			break;
+	if (i == NEC_IOBASE)
+		return (0);
+
+	/* Validate the mem base. */
+	for (i = 0; i < NEC_MEMBASE; i++) {
+		if (ec_membase[i] == MADDRUNK)
+			continue;
+		if (ia->ia_maddr == ec_membase[i])
+			break;
+	}
+	if (i == NEC_MEMBASE)
+		return (0);
+
+	/* Attempt to map the NIC space. */
+	if (bus_space_map(nict, ia->ia_iobase + ELINK2_NIC_OFFSET,
+	    ELINK2_NIC_PORTS, 0, &nich))
+		goto out;
+	nich_valid = 1;
+
+	/* Attempt to map the ASIC space. */
+	if (bus_space_map(asict, ia->ia_iobase + ELINK2_ASIC_OFFSET,
+	    ELINK2_ASIC_PORTS, 0, &asich))
+		goto out;
+	asich_valid = 1;
+
+	/* Attempt to map the memory space. */
+	if (bus_space_map(memt, ia->ia_maddr, memsize, 0, &memh))
+		goto out;
+	memh_valid = 1;
+
+	/*
+	 * Verify that the kernel configured I/O address matches the
+	 * board configured I/O address.
+	 *
+	 * This is really only useful to see if something that looks like
+	 * the board is there; after all, we're already talking to it at
+	 * this point.
+	 */
+	x = bus_space_read_1(asict, asich, ELINK2_BCFR);
+	if (x == 0 || (x & (x - 1)) != 0)
+		goto out;
+	i = ffs(x) - 1;
+	if (ia->ia_iobase != ec_iobase[i])
+		goto out;
+
+	/*
+	 * ...and for the memory address.  Note we do not support
+	 * cards configured with shared memory disabled.
+	 */
+	x = bus_space_read_1(asict, asich, ELINK2_PCFR);
+	if (x == 0 || (x & (x - 1)) != 0)
+		goto out;
+	i = ffs(x) - 1;
+	if (ia->ia_maddr != ec_membase[i])
+		goto out;
+
+	/* So, we say we've found it! */
+	ia->ia_iosize = ELINK2_NIC_PORTS;
+	ia->ia_msize = memsize;
+	rv = 1;
+
+ out:
+	if (nich_valid)
+		bus_space_unmap(nict, nich, ELINK2_NIC_PORTS);
+	if (asich_valid)
+		bus_space_unmap(asict, asich, ELINK2_ASIC_PORTS);
+	if (memh_valid)
+		bus_space_unmap(memt, memh, memsize);
+	return (rv);
+}
+
+void
+ec_attach(parent, self, aux)
+	struct device *parent, *self;
+	void *aux;
+{
+	struct ec_softc *esc = (struct ec_softc *)self;
+	struct dp8390_softc *sc = &esc->sc_dp8390;
+	struct isa_attach_args *ia = aux;
+	bus_space_tag_t nict, asict, memt;
+	bus_space_handle_t nich, asich, memh;
+	bus_size_t memsize;
+	u_int8_t tmp;
+	int i;
+
+	printf("\n");
+
+	nict = asict = ia->ia_iot;
+	memt = ia->ia_memt;
+
+	/*
+	 * Hmm, a 16-bit card has 16k of memory, but only an 8k window
+	 * to it.
+	 */
+	memsize = 8192;
+
+	/* Map the NIC space. */
+	if (bus_space_map(nict, ia->ia_iobase + ELINK2_NIC_OFFSET,
+	    ELINK2_NIC_PORTS, 0, &nich)) {
+		printf("%s: can't map nic i/o space\n",
+		    sc->sc_dev.dv_xname);
+		return;
+	}
+
+	/* Map the ASIC space. */
+	if (bus_space_map(asict, ia->ia_iobase + ELINK2_ASIC_OFFSET,
+	    ELINK2_ASIC_PORTS, 0, &asich)) {
+		printf("%s: can't map asic i/o space\n",
+		    sc->sc_dev.dv_xname);
+		return;
+	}
+
+	/* Map the memory space. */
+	if (bus_space_map(memt, ia->ia_maddr, memsize, 0, &memh)) {
+		printf("%s: can't map shared memory\n",
+		    sc->sc_dev.dv_xname);
+		return;
+	}
+
+	esc->sc_asict = asict;
+	esc->sc_asich = asich;
+
+	sc->sc_regt = nict;
+	sc->sc_regh = nich;
+
+	sc->sc_buft = memt;
+	sc->sc_bufh = memh;
+
+	/* Interface is always enabled. */
+	sc->sc_enabled = 1;
+
+	/* Registers are linear. */
+	for (i = 0; i < 16; i++)
+		sc->sc_reg_map[i] = i;
+
+	/* Now we can use the NIC_{GET,PUT}() macros. */
+
+	/*
+	 * Reset NIC and ASIC.  Enable on-board transeiver throughout
+	 * reset sequence since it will lock up if the cable isn't
+	 * connected if we don't.
+	 */
+	bus_space_write_1(asict, asich, ELINK2_CR,
+	    ELINK2_CR_RST | ELINK2_CR_XSEL);
+
+	/* Wait for a while, then un-reset it. */
+	delay(50);
+
+	/*
+	 * The 3Com ASIC defaults to rather strange settings for the CR
+	 * after a reset.  It's important to set it again after the
+	 * following write (this is done when we map the PROM below).
+	 */
+	bus_space_write_1(asict, asich, ELINK2_CR, ELINK2_CR_XSEL);
+
+	/* Wait a bit for the NIC to recover from the reset. */
+	delay(5000);
+
+	/*
+	 * Get the station address from on-board ROM.
+	 *
+	 * First, map Ethernet address PROM over the top of where the NIC
+	 * registers normally appear.
+	 */
+	bus_space_write_1(asict, asich, ELINK2_CR,
+	    ELINK2_CR_XSEL | ELINK2_CR_EALO);
+
+	for (i = 0; i < ETHER_ADDR_LEN; i++)
+#ifdef __NetBSD__
+		sc->sc_enaddr[i] = NIC_GET(nict, nich, i);
+#else
+		sc->sc_arpcom.ac_enaddr[i] = NIC_GET(nict, nich, i);
+#endif
+
+	/*
+	 * Unmap PROM - select NIC registers.  The proper setting of the
+	 * transciever is set in later in ec_init_card() via dp8390_init().
+	 */
+	bus_space_write_1(asict, asich, ELINK2_CR, ELINK2_CR_XSEL);
+
+	/* Determine if this is an 8-bit or 16-bit board. */
+
+	/* Select page 0 registers. */
+	NIC_PUT(nict, nich, ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
+
+	/*
+	 * Attempt to clear WTS.  If it doesn't clear, then this is a
+	 * 16-bit board.
+	 */
+	NIC_PUT(nict, nich, ED_P0_DCR, 0);
+
+	/* Select page 2 registers. */
+	NIC_PUT(nict, nich, ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_2 | ED_CR_STP);
+
+	/* The 3c503 forces the WTS bit to a one if this is a 16-bit board. */
+	if (NIC_GET(nict, nich, ED_P2_DCR) & ED_DCR_WTS)
+		esc->sc_16bitp = 1;
+	else
+		esc->sc_16bitp = 0;
+
+	printf("%s: 3Com 3c503 Ethernet (%s-bit)\n",
+	    sc->sc_dev.dv_xname, esc->sc_16bitp ? "16" : "8");
+
+	/* Select page 0 registers. */
+	NIC_PUT(nict, nich, ED_P2_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
+
+	sc->cr_proto = ED_CR_RD2;
+
+	/*
+	 * DCR gets:
+	 *
+	 *	FIFO threshold to 8, No auto-init Remote DMA,
+	 *	byte order=80x86.
+	 *
+	 * 16-bit cards also get word-wide DMA transfers.
+	 */
+	sc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS |
+	    (esc->sc_16bitp ? ED_DCR_WTS : 0);
+
+	sc->test_mem = ec_fake_test_mem;
+	sc->ring_copy = ec_ring_copy;
+	sc->write_mbuf = ec_write_mbuf;
+	sc->read_hdr = ec_read_hdr;
+
+	sc->sc_mediachange = ec_mediachange;
+	sc->sc_mediastatus = ec_mediastatus;
+
+	sc->mem_start = 0;
+	sc->mem_size = memsize;
+
+	/* Do generic parts of attach. */
+	if (dp8390_config(sc, ec_media, NEC_MEDIA, EC_DEFMEDIA)) {
+		printf("%s: configuration failed\n", sc->sc_dev.dv_xname);
+		return;
+	}
+
+	/*
+	 * We need to override the way dp8390_config() set up our
+	 * shared memory.
+	 *
+	 * We have an entire 8k window to put the transmit buffers on the
+	 * 16-bit boards.  But since the 16bit 3c503's shared memory is only
+	 * fast enough to overlap the loading of one full-size packet, trying
+	 * to load more than 2 buffers can actually leave the transmitter idle
+	 * during the load.  So 2 seems the best value.  (Although a mix of
+	 * variable-sized packets might change this assumption.  Nonetheless,
+	 * we optimize for linear transfers of same-size packets.)
+	 */
+	if (esc->sc_16bitp) {
+		if (sc->sc_dev.dv_cfdata->cf_flags & DP8390_NO_MULTI_BUFFERING)
+			sc->txb_cnt = 1;
+		else
+			sc->txb_cnt = 2;
+
+		sc->tx_page_start = ELINK2_TX_PAGE_OFFSET_16BIT;
+		sc->rec_page_start = ELINK2_RX_PAGE_OFFSET_16BIT;
+		sc->rec_page_stop = (memsize >> ED_PAGE_SHIFT) + 
+		    sc->rec_page_start;
+		sc->mem_ring = sc->mem_start;
+	} else {
+		sc->txb_cnt = 1;
+		sc->tx_page_start = ELINK2_TX_PAGE_OFFSET_8BIT;
+		sc->rec_page_start = sc->tx_page_start + ED_TXBUF_SIZE;
+		sc->rec_page_stop = (memsize >> ED_PAGE_SHIFT) +
+		    sc->tx_page_start;
+		sc->mem_ring = sc->mem_start +
+		    (ED_TXBUF_SIZE << ED_PAGE_SHIFT);
+	}
+
+	/*
+	 * Initialize CA page start/stop registers.  Probably only needed
+	 * if doing DMA, but what the Hell.
+	 */
+	bus_space_write_1(asict, asich, ELINK2_PSTR, sc->rec_page_start);
+	bus_space_write_1(asict, asich, ELINK2_PSPR, sc->rec_page_stop);
+
+	/*
+	 * Program the IRQ.
+	 */
+	switch (ia->ia_irq) {
+	case 9:	tmp = ELINK2_IDCFR_IRQ2; break;
+	case 3:	tmp = ELINK2_IDCFR_IRQ3; break;
+	case 4:	tmp = ELINK2_IDCFR_IRQ4; break;
+	case 5:	tmp = ELINK2_IDCFR_IRQ5; break;
+		break;
+
+	case IRQUNK:
+		printf("%s: wildcarded IRQ is not allowed\n",
+		    sc->sc_dev.dv_xname);
+		return;
+
+	default:
+		printf("%s: invalid IRQ %d, must be 3, 4, 5, or 9\n",
+		    sc->sc_dev.dv_xname, ia->ia_irq);
+		return;
+	}
+
+	bus_space_write_1(asict, asich, ELINK2_IDCFR, tmp);
+
+	/*
+	 * Initialize the GA configuration register.  Set bank and enable
+	 * shared memory.
+	 */
+	bus_space_write_1(asict, asich, ELINK2_GACFR,
+	    ELINK2_GACFR_RSEL | ELINK2_GACFR_MBS0);
+
+	/*
+	 * Intialize "Vector Pointer" registers.  These gawd-awful things
+	 * are compared to 20 bits of the address on the ISA, and if they
+	 * match, the shared memory is disabled.  We se them to 0xffff0...
+	 * allegedly the reset vector.
+	 */
+	bus_space_write_1(asict, asich, ELINK2_VPTR2, 0xff);
+	bus_space_write_1(asict, asich, ELINK2_VPTR1, 0xff);
+	bus_space_write_1(asict, asich, ELINK2_VPTR0, 0x00);
+
+	/*
+	 * Now run the real memory test.
+	 */
+	if (ec_test_mem(sc)) {
+		printf("%s: memory test failed\n", sc->sc_dev.dv_xname);
+		return;
+	}
+
+	/* Establish interrupt handler. */
+	esc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
+	    IPL_NET, dp8390_intr, sc, sc->sc_dev.dv_xname);
+	if (esc->sc_ih == NULL)
+		printf("%s: can't establish interrupt\n", sc->sc_dev.dv_xname);
+}
+
+int
+ec_fake_test_mem(sc)
+	struct dp8390_softc *sc;
+{
+
+	/*
+	 * We have to do this after we initialize the GA, but we
+	 * have to do that after calling dp8390_config(), which
+	 * wants to test memory.  Put this noop here, and then
+	 * actually test memory later.
+	 */
+	return (0);
+}
+
+int
+ec_test_mem(sc)
+	struct dp8390_softc *sc;
+{
+	struct ec_softc *esc = (struct ec_softc *)sc;
+	bus_space_tag_t memt = sc->sc_buft;
+	bus_space_handle_t memh = sc->sc_bufh;
+	bus_size_t memsize = sc->mem_size;
+	int i;
+
+	if (esc->sc_16bitp)
+		bus_space_set_region_2(memt, memh, 0, 0, memsize >> 1);
+	else
+		bus_space_set_region_1(memt, memh, 0, 0, memsize);
+
+	if (esc->sc_16bitp) {
+		for (i = 0; i < memsize; i += 2) {
+			if (bus_space_read_2(memt, memh, i) != 0)
+				goto fail;
+		}
+	} else {
+		for (i = 0; i < memsize; i++) {
+			if (bus_space_read_1(memt, memh, i) != 0)
+				goto fail;
+		}
+	}
+
+	return (0);
+
+ fail:
+	printf("%s: failed to clear shared memory at offset 0x%x\n",
+	    sc->sc_dev.dv_xname, i);
+	return (1);
+}
+
+/*
+ * Given a NIC memory source address and a host memory destination address,
+ * copy 'len' from NIC to host using shared memory.  The 'len' is rounded
+ * up to a word - ok as long as mbufs are word-sized.
+ */
+__inline void
+ec_readmem(esc, from, to, len)
+	struct ec_softc *esc;
+	int from;
+	u_int8_t *to;
+	int len;
+{
+	bus_space_tag_t memt = esc->sc_dp8390.sc_buft;
+	bus_space_handle_t memh = esc->sc_dp8390.sc_bufh;
+
+	if (len & 1)
+		++len;
+
+	if (esc->sc_16bitp)
+		bus_space_read_region_2(memt, memh, from, (u_int16_t *)to,
+		    len >> 1);
+	else
+		bus_space_read_region_1(memt, memh, from, to, len);
+}
+
+int
+ec_write_mbuf(sc, m, buf)
+	struct dp8390_softc *sc;
+	struct mbuf *m;
+	int buf;
+{
+	struct ec_softc *esc = (struct ec_softc *)sc;
+	bus_space_tag_t asict = esc->sc_asict;
+	bus_space_handle_t asich = esc->sc_asich;
+	bus_space_tag_t memt = esc->sc_dp8390.sc_buft;
+	bus_space_handle_t memh = esc->sc_dp8390.sc_bufh;
+	u_int8_t *data, savebyte[2];
+	int savelen, len, leftover;
+#ifdef DIAGNOSTIC
+	u_int8_t *lim;
+#endif
+
+	savelen = m->m_pkthdr.len;
+
+	/*
+	 * 8-bit boards are simple: we're already in the correct
+	 * page, and no alignment tricks are necessary.
+	 */
+	if (esc->sc_16bitp == 0) {
+		for (; m != NULL; buf += m->m_len, m = m->m_next)
+			bus_space_write_region_1(memt, memh, buf,
+			    mtod(m, u_int8_t *), m->m_len);
+		return (savelen);
+	}
+
+	/*
+	 * If it's a 16-bit board, we have transmit buffers
+	 * in a different page; switch to it.
+	 */
+	if (esc->sc_16bitp)
+		bus_space_write_1(asict, asich, ELINK2_GACFR,
+		    ELINK2_GACFR_RSEL);
+
+	/* Start out with no leftover data. */
+	leftover = 0;
+	savebyte[0] = savebyte[1] = 0;
+
+	for (; m != NULL; m = m->m_next) {
+		len = m->m_len;
+		if (len == 0)
+			continue;
+		data = mtod(m, u_int8_t *);
+#ifdef DIAGNOSTIC
+		lim = data + 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.
+				 */
+				savebyte[1] = *data++;
+				len--;
+				bus_space_write_2(memt, memh, buf,
+				    *(u_int16_t *)savebyte);
+				buf += 2;
+				leftover = 0;
+#ifdef i386
+#define ALIGNED_POINTER(p,t)	1
+#endif
+#ifdef alpha
+#define ALIGNED_POINTER(p,t)	((((u_long)(p)) & (sizeof(t)-1)) == 0)
+#endif
+			} else if (ALIGNED_POINTER(data, u_int16_t) == 0) {
+				/*
+				 * Unaligned data; buffer the next byte.
+				 */
+				savebyte[0] = *data++;
+				len--;
+				leftover = 1;
+			} else {
+				/*
+				 * Aligned data; output contiguous words as
+				 * much as we can, then buffer the remaining
+				 * byte, if any.
+				 */
+				leftover = len & 1;
+				len &= ~1;
+				bus_space_write_region_2(memt, memh, buf,
+				    (u_int16_t *)data, len >> 1);
+				data += len;
+				buf += len;
+				if (leftover)
+					savebyte[0] = *data++;
+				len = 0;
+			}
+		}
+		if (len < 0)
+			panic("ec_write_mbuf: negative len");
+#ifdef DIAGNOSTIC
+		if (data != lim)
+			panic("ec_write_mbuf: data != lim");
+#endif
+	}
+	if (leftover) {
+		savebyte[1] = 0;
+		bus_space_write_2(memt, memh, buf, *(u_int16_t *)savebyte);
+	}
+
+	/*
+	 * Switch back to receive page.
+	 */
+	if (esc->sc_16bitp)
+		bus_space_write_1(asict, asich, ELINK2_GACFR,
+		    ELINK2_GACFR_RSEL | ELINK2_GACFR_MBS0);
+	
+	return (savelen);
+}
+
+int
+ec_ring_copy(sc, src, dst, amount)
+	struct dp8390_softc *sc;
+	int src;
+	caddr_t dst;
+	u_short amount;
+{
+	struct ec_softc *esc = (struct ec_softc *)sc;
+	u_short tmp_amount;
+
+	/* Does copy wrap to lower addr in ring buffer? */
+	if (src + amount > sc->mem_end) {
+		tmp_amount = sc->mem_end - src;
+
+		/* Copy amount up to end of NIC memory. */
+		ec_readmem(esc, src, dst, tmp_amount);
+
+		amount -= tmp_amount;
+		src = sc->mem_ring;
+		dst += tmp_amount;
+	}
+
+	ec_readmem(esc, src, dst, amount);
+
+	return (src + amount);
+}
+
+void
+ec_read_hdr(sc, packet_ptr, packet_hdrp)
+	struct dp8390_softc *sc;
+	int packet_ptr;
+	struct dp8390_ring *packet_hdrp;
+{
+	struct ec_softc *esc = (struct ec_softc *)sc;
+
+	ec_readmem(esc, packet_ptr, (u_int8_t *)packet_hdrp,
+	    sizeof(struct dp8390_ring));
+#if BYTE_ORDER == BIG_ENDIAN
+	packet_hdrp->count = bswap16(packet_hdrp->count);
+#endif
+}
+
+int
+ec_mediachange(sc)
+	struct dp8390_softc *sc;
+{
+	struct ec_softc *esc = (struct ec_softc *)sc;
+	struct ifmedia *ifm = &sc->sc_media;
+
+	return (ec_set_media(esc, ifm->ifm_media));
+}
+
+void
+ec_mediastatus(sc, ifmr)
+	struct dp8390_softc *sc;
+	struct ifmediareq *ifmr;
+{
+	struct ifmedia *ifm = &sc->sc_media;
+
+	/*
+	 * The currently selected media is always the active media.
+	 */
+	ifmr->ifm_active = ifm->ifm_cur->ifm_media;
+}
+
+void
+ec_init_card(sc)
+	struct dp8390_softc *sc;
+{
+	struct ec_softc *esc = (struct ec_softc *)sc;
+	struct ifmedia *ifm = &sc->sc_media;
+
+	(void) ec_set_media(esc, ifm->ifm_cur->ifm_media);
+}
+
+int
+ec_set_media(esc, media)
+	struct ec_softc *esc;
+	int media;
+{
+	u_int8_t new;
+
+	if (IFM_TYPE(media) != IFM_ETHER)
+		return (EINVAL);
+
+	switch (IFM_SUBTYPE(media)) {
+	case IFM_10_2:
+		new = ELINK2_CR_XSEL;
+		break;
+
+	case IFM_10_5:
+		new = 0;
+		break;
+
+	default:
+		return (EINVAL);
+	}
+
+	bus_space_write_1(esc->sc_asict, esc->sc_asich, ELINK2_CR, new);
+	return (0);
+}