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diff --git a/sys/dev/ic/ne2000.c b/sys/dev/ic/ne2000.c
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+/* $OpenBSD: ne2000.c,v 1.1 1998/09/22 06:38:03 fgsch Exp $ */
+/* $NetBSD: ne2000.c,v 1.12 1998/06/10 01:15:50 thorpej 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.
+ */
+
+/*
+ * Common code shared by all NE2000-compatible Ethernet interfaces.
+ */
+
+#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>
+#else
+#include <netinet/in.h>
+#include <netinet/if_ether.h>
+#endif
+
+#include <machine/bus.h>
+
+#ifndef __BUS_SPACE_HAS_STREAM_METHODS
+#define bus_space_write_stream_2 bus_space_write_2
+#define bus_space_write_multi_stream_2 bus_space_write_multi_2
+#define bus_space_read_multi_stream_2 bus_space_read_multi_2
+#endif /* __BUS_SPACE_HAS_STREAM_METHODS */
+
+#include <dev/ic/dp8390reg.h>
+#include <dev/ic/dp8390var.h>
+
+#include <dev/ic/ne2000reg.h>
+#include <dev/ic/ne2000var.h>
+
+int ne2000_write_mbuf __P((struct dp8390_softc *, struct mbuf *, int));
+int ne2000_ring_copy __P((struct dp8390_softc *, int, caddr_t, u_short));
+void ne2000_read_hdr __P((struct dp8390_softc *, int, struct dp8390_ring *));
+int ne2000_test_mem __P((struct dp8390_softc *));
+
+void ne2000_writemem __P((bus_space_tag_t, bus_space_handle_t,
+ bus_space_tag_t, bus_space_handle_t, u_int8_t *, int, size_t, int));
+void ne2000_readmem __P((bus_space_tag_t, bus_space_handle_t,
+ bus_space_tag_t, bus_space_handle_t, int, u_int8_t *, size_t, int));
+
+struct cfdriver ne_cd = {
+ NULL, "ne", DV_IFNET
+};
+
+void
+ne2000_attach(nsc, myea)
+ struct ne2000_softc *nsc;
+ u_int8_t *myea;
+{
+ struct dp8390_softc *dsc = &nsc->sc_dp8390;
+ bus_space_tag_t nict = dsc->sc_regt;
+ bus_space_handle_t nich = dsc->sc_regh;
+ bus_space_tag_t asict = nsc->sc_asict;
+ bus_space_handle_t asich = nsc->sc_asich;
+ u_int8_t romdata[16];
+ int memsize, i, useword;
+
+ /*
+ * Detect it again; this gives us the memory size.
+ */
+ nsc->sc_type = ne2000_detect(nict, nich, asict, asich);
+ if (nsc->sc_type == 0) {
+ printf("%s: where did the card go?\n", dsc->sc_dev.dv_xname);
+ return;
+ }
+
+ useword = (nsc->sc_type == NE2000_TYPE_NE2000);
+
+ dsc->cr_proto = ED_CR_RD2;
+
+ /*
+ * DCR gets:
+ *
+ * FIFO threshold to 8, No auto-init Remote DMA,
+ * byte order=80x86.
+ *
+ * NE1000 gets byte-wide DMA, NE2000 gets word-wide DMA.
+ */
+ dsc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS |
+ (nsc->sc_type == NE2000_TYPE_NE2000 ? ED_DCR_WTS : 0);
+
+ dsc->test_mem = ne2000_test_mem;
+ dsc->ring_copy = ne2000_ring_copy;
+ dsc->write_mbuf = ne2000_write_mbuf;
+ dsc->read_hdr = ne2000_read_hdr;
+
+ /* Registers are linear. */
+ for (i = 0; i < 16; i++)
+ dsc->sc_reg_map[i] = i;
+
+ /*
+ * 8k of memory plus an additional 8k if an NE2000.
+ */
+ memsize = 8192 + (nsc->sc_type == NE2000_TYPE_NE2000 ? 8192 : 0);
+
+ /*
+ * NIC memory doens't start at zero on an NE board.
+ * The start address is tied to the bus width.
+ * (It happens to be computed the same way as mem size.)
+ */
+ dsc->mem_start = memsize;
+
+#ifdef GWETHER
+ {
+ int x, mstart = 0;
+ int8_t pbuf0[ED_PAGE_SIZE], pbuf[ED_PAGE_SIZE],
+ tbuf[ED_PAGE_SIZE];
+
+ for (i = 0; i < ED_PAGE_SIZE; i++)
+ pbuf0[i] = 0;
+
+ /* Search for the start of RAM. */
+ for (x = 1; x < 256; x++) {
+ ne2000_writemem(nict, nich, asict, asich, pbuf0,
+ x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword);
+ ne2000_readmem(nict, nich, asict, asich,
+ x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword);
+ if (bcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) {
+ for (i = 0; i < ED_PAGE_SIZE; i++)
+ pbuf[i] = 255 - x;
+ ne2000_writemem(nict, nich, asict, asich,
+ pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE,
+ useword);
+ ne2000_readmem(nict, nich, asict, asich,
+ x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE,
+ useword);
+ if (bcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) {
+ mstart = x << ED_PAGE_SHIFT;
+ memsize = ED_PAGE_SIZE;
+ break;
+ }
+ }
+ }
+
+ if (mstart == 0) {
+ printf("%s: cannot find start of RAM\n",
+ dsc->sc_dev.dv_xname);
+ return;
+ }
+
+ /* Search for the end of RAM. */
+ for (++x; x < 256; x++) {
+ ne2000_writemem(nict, nich, asict, asich, pbuf0,
+ x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword);
+ ne2000_readmem(nict, nich, asict, asich,
+ x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword);
+ if (bcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) {
+ for (i = 0; i < ED_PAGE_SIZE; i++)
+ pbuf[i] = 255 - x;
+ ne2000_writemem(nict, nich, asict, asich,
+ pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE,
+ useword);
+ ne2000_readmem(nict, nich, asict, asich,
+ x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE
+ useword);
+ if (bcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0)
+ memsize += ED_PAGE_SIZE;
+ else
+ break;
+ } else
+ break;
+ }
+
+ printf("%s: RAM start 0x%x, size %d\n",
+ dsc->sc_dev.dv_xname, mstart, msize);
+
+ dsc->mem_start = mstart;
+ }
+#endif /* GWETHER */
+
+ dsc->mem_size = memsize;
+
+ if (myea == NULL) {
+ /* Read the station address. */
+ ne2000_readmem(nict, nich, asict, asich, 0, romdata,
+ sizeof(romdata), useword);
+ for (i = 0; i < ETHER_ADDR_LEN; i++)
+#ifdef __NetBSD__
+ dsc->sc_enaddr[i] = romdata[i * (useword ? 2 : 1)];
+#else
+ dsc->sc_arpcom.ac_enaddr[i] =
+ romdata[i * (useword ? 2 : 1)];
+#endif
+ } else
+#ifdef __NetBSD__
+ bcopy(myea, dsc->sc_enaddr, sizeof(dsc->sc_enaddr));
+#else
+ bcopy(myea, dsc->sc_arpcom.ac_enaddr,
+ sizeof(dsc->sc_arpcom.ac_enaddr));
+#endif
+
+ /* Clear any pending interrupts that might have occurred above. */
+ bus_space_write_1(nict, nich, ED_P0_ISR, 0xff);
+
+ if (dp8390_config(dsc, NULL, 0, 0)) {
+ printf("%s: setup failed\n", dsc->sc_dev.dv_xname);
+ return;
+ }
+
+ /*
+ * We need to compute mem_ring a bit differently; override the
+ * value set up in dp8390_config().
+ */
+ dsc->mem_ring =
+ dsc->mem_start + ((dsc->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT);
+}
+
+/*
+ * Detect an NE-2000 or compatible. Returns a model code.
+ */
+int
+ne2000_detect(nict, nich, asict, asich)
+ bus_space_tag_t nict;
+ bus_space_handle_t nich;
+ bus_space_tag_t asict;
+ bus_space_handle_t asich;
+{
+ static u_int8_t test_pattern[32] = "THIS is A memory TEST pattern";
+ u_int8_t test_buffer[32], tmp;
+ int i, rv = 0;
+
+ /* Reset the board. */
+#ifdef GWETHER
+ bus_space_write_1(asict, asich, NE2000_ASIC_RESET, 0);
+ delay(200);
+#endif /* GWETHER */
+ tmp = bus_space_read_1(asict, asich, NE2000_ASIC_RESET);
+ delay(10000);
+
+ /*
+ * I don't know if this is necessary; probably cruft leftover from
+ * Clarkson packet driver code. Doesn't do a thing on the boards I've
+ * tested. -DG [note that a outb(0x84, 0) seems to work here, and is
+ * non-invasive...but some boards don't seem to reset and I don't have
+ * complete documentation on what the 'right' thing to do is...so we do
+ * the invasive thing for now. Yuck.]
+ */
+ bus_space_write_1(asict, asich, NE2000_ASIC_RESET, tmp);
+ delay(5000);
+
+ /*
+ * This is needed because some NE clones apparently don't reset the
+ * NIC properly (or the NIC chip doesn't reset fully on power-up).
+ * XXX - this makes the probe invasive! Done against my better
+ * judgement. -DLG
+ */
+ bus_space_write_1(nict, nich, ED_P0_CR,
+ ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
+
+ delay(5000);
+
+ /*
+ * Generic probe routine for testing for the existance of a DS8390.
+ * Must be performed after the NIC has just been reset. This
+ * works by looking at certain register values that are guaranteed
+ * to be initialized a certain way after power-up or reset.
+ *
+ * Specifically:
+ *
+ * Register reset bits set bits
+ * -------- ---------- --------
+ * CR TXP, STA RD2, STP
+ * ISR RST
+ * IMR <all>
+ * DCR LAS
+ * TCR LB1, LB0
+ *
+ * We only look at CR and ISR, however, since looking at the others
+ * would require changing register pages, which would be intrusive
+ * if this isn't an 8390.
+ */
+
+ tmp = bus_space_read_1(nict, nich, ED_P0_CR);
+ if ((tmp & (ED_CR_RD2 | ED_CR_TXP | ED_CR_STA | ED_CR_STP)) !=
+ (ED_CR_RD2 | ED_CR_STP))
+ goto out;
+
+ tmp = bus_space_read_1(nict, nich, ED_P0_ISR);
+ if ((tmp & ED_ISR_RST) != ED_ISR_RST)
+ goto out;
+
+ bus_space_write_1(nict, nich,
+ ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
+
+ for (i = 0; i < 100; i++) {
+ if ((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RST) ==
+ ED_ISR_RST) {
+ /* Ack the reset bit. */
+ bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RST);
+ break;
+ }
+ delay(100);
+ }
+
+#if 0
+ /* XXX */
+ if (i == 100)
+ goto out;
+#endif
+
+ /*
+ * Test the ability to read and write to the NIC memory. This has
+ * the side effect of determining if this is an NE1000 or an NE2000.
+ */
+
+ /*
+ * This prevents packets from being stored in the NIC memory when
+ * the readmem routine turns on the start bit in the CR.
+ */
+ bus_space_write_1(nict, nich, ED_P0_RCR, ED_RCR_MON);
+
+ /* Temporarily initialize DCR for byte operations. */
+ bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS);
+
+ bus_space_write_1(nict, nich, ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT);
+ bus_space_write_1(nict, nich, ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT);
+
+ /*
+ * Write a test pattern in byte mode. If this fails, then there
+ * probably isn't any memory at 8k - which likely means that the
+ * board is an NE2000.
+ */
+ ne2000_writemem(nict, nich, asict, asich, test_pattern, 8192,
+ sizeof(test_pattern), 0);
+ ne2000_readmem(nict, nich, asict, asich, 8192, test_buffer,
+ sizeof(test_buffer), 0);
+
+ if (bcmp(test_pattern, test_buffer, sizeof(test_pattern))) {
+ /* not an NE1000 - try NE2000 */
+ bus_space_write_1(nict, nich, ED_P0_DCR,
+ ED_DCR_WTS | ED_DCR_FT1 | ED_DCR_LS);
+ bus_space_write_1(nict, nich, ED_P0_PSTART,
+ 16384 >> ED_PAGE_SHIFT);
+ bus_space_write_1(nict, nich, ED_P0_PSTOP,
+ 32768 >> ED_PAGE_SHIFT);
+
+ /*
+ * Write the test pattern in word mode. If this also fails,
+ * then we don't know what this board is.
+ */
+ ne2000_writemem(nict, nich, asict, asich, test_pattern, 16384,
+ sizeof(test_pattern), 1);
+ ne2000_readmem(nict, nich, asict, asich, 16384, test_buffer,
+ sizeof(test_buffer), 1);
+
+ if (bcmp(test_pattern, test_buffer, sizeof(test_pattern)))
+ goto out; /* not an NE2000 either */
+
+ rv = NE2000_TYPE_NE2000;
+ } else {
+ /* We're an NE1000. */
+ rv = NE2000_TYPE_NE1000;
+ }
+
+ /* Clear any pending interrupts that might have occurred above. */
+ bus_space_write_1(nict, nich, ED_P0_ISR, 0xff);
+
+ out:
+ return (rv);
+}
+
+/*
+ * Write an mbuf chain to the destination NIC memory address using programmed
+ * I/O.
+ */
+int
+ne2000_write_mbuf(sc, m, buf)
+ struct dp8390_softc *sc;
+ struct mbuf *m;
+ int buf;
+{
+ struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
+ bus_space_tag_t nict = sc->sc_regt;
+ bus_space_handle_t nich = sc->sc_regh;
+ bus_space_tag_t asict = nsc->sc_asict;
+ bus_space_handle_t asich = nsc->sc_asich;
+ int savelen;
+ int maxwait = 100; /* about 120us */
+
+ savelen = m->m_pkthdr.len;
+
+ /* Select page 0 registers. */
+ bus_space_write_1(nict, nich, ED_P0_CR,
+ ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
+
+ /* Reset remote DMA complete flag. */
+ bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC);
+
+ /* Set up DMA byte count. */
+ bus_space_write_1(nict, nich, ED_P0_RBCR0, savelen);
+ bus_space_write_1(nict, nich, ED_P0_RBCR1, savelen >> 8);
+
+ /* Set up destination address in NIC mem. */
+ bus_space_write_1(nict, nich, ED_P0_RSAR0, buf);
+ bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8);
+
+ /* Set remote DMA write. */
+ bus_space_write_1(nict, nich,
+ ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
+
+ /*
+ * Transfer the mbuf chain to the NIC memory. NE2000 cards
+ * require that data be transferred as words, and only words,
+ * so that case requires some extra code to patch over odd-length
+ * mbufs.
+ */
+ if (nsc->sc_type == NE2000_TYPE_NE1000) {
+ /* NE1000s are easy. */
+ for (; m != 0; m = m->m_next) {
+ if (m->m_len) {
+ bus_space_write_multi_1(asict, asich,
+ NE2000_ASIC_DATA, mtod(m, u_int8_t *),
+ m->m_len);
+ }
+ }
+ } else {
+ /* NE2000s are a bit trickier. */
+ u_int8_t *data, savebyte[2];
+ int l, leftover;
+#ifdef DIAGNOSTIC
+ u_int8_t *lim;
+#endif
+ /* Start out with no leftover data. */
+ leftover = 0;
+ savebyte[0] = savebyte[1] = 0;
+
+ for (; m != 0; m = m->m_next) {
+ l = m->m_len;
+ if (l == 0)
+ continue;
+ data = mtod(m, u_int8_t *);
+#ifdef DIAGNOSTIC
+ lim = data + l;
+#endif
+ while (l > 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++;
+ l--;
+ bus_space_write_stream_2(asict, asich,
+ NE2000_ASIC_DATA,
+ *(u_int16_t *)savebyte);
+ 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++;
+ l--;
+ leftover = 1;
+ } else {
+ /*
+ * Aligned data; output contiguous
+ * words as much as we can, then
+ * buffer the remaining byte, if any.
+ */
+ leftover = l & 1;
+ l &= ~1;
+ bus_space_write_multi_stream_2(asict,
+ asich, NE2000_ASIC_DATA,
+ (u_int16_t *)data, l >> 1);
+ data += l;
+ if (leftover)
+ savebyte[0] = *data++;
+ l = 0;
+ }
+ }
+ if (l < 0)
+ panic("ne2000_write_mbuf: negative len");
+#ifdef DIAGNOSTIC
+ if (data != lim)
+ panic("ne2000_write_mbuf: data != lim");
+#endif
+ }
+ if (leftover) {
+ savebyte[1] = 0;
+ bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA,
+ *(u_int16_t *)savebyte);
+ }
+ }
+
+ /*
+ * Wait for remote DMA to complete. This is necessary because on the
+ * transmit side, data is handled internally by the NIC in bursts, and
+ * we can't start another remote DMA until this one completes. Not
+ * waiting causes really bad things to happen - like the NIC wedging
+ * the bus.
+ */
+ while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) !=
+ ED_ISR_RDC) && --maxwait);
+
+ if (maxwait == 0) {
+ log(LOG_WARNING,
+ "%s: remote transmit DMA failed to complete\n",
+ sc->sc_dev.dv_xname);
+ dp8390_reset(sc);
+ }
+
+ return (savelen);
+}
+
+/*
+ * Given a source and destination address, copy 'amout' of a packet from
+ * the ring buffer into a linear destination buffer. Takes into account
+ * ring-wrap.
+ */
+int
+ne2000_ring_copy(sc, src, dst, amount)
+ struct dp8390_softc *sc;
+ int src;
+ caddr_t dst;
+ u_short amount;
+{
+ struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
+ bus_space_tag_t nict = sc->sc_regt;
+ bus_space_handle_t nich = sc->sc_regh;
+ bus_space_tag_t asict = nsc->sc_asict;
+ bus_space_handle_t asich = nsc->sc_asich;
+ u_short tmp_amount;
+ int useword = (nsc->sc_type == NE2000_TYPE_NE2000);
+
+ /* 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. */
+ ne2000_readmem(nict, nich, asict, asich, src,
+ (u_int8_t *)dst, tmp_amount, useword);
+
+ amount -= tmp_amount;
+ src = sc->mem_ring;
+ dst += tmp_amount;
+ }
+
+ ne2000_readmem(nict, nich, asict, asich, src, (u_int8_t *)dst,
+ amount, useword);
+
+ return (src + amount);
+}
+
+void
+ne2000_read_hdr(sc, buf, hdr)
+ struct dp8390_softc *sc;
+ int buf;
+ struct dp8390_ring *hdr;
+{
+ struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
+
+ ne2000_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich,
+ buf, (u_int8_t *)hdr, sizeof(struct dp8390_ring),
+ (nsc->sc_type == NE2000_TYPE_NE2000));
+#if BYTE_ORDER == BIG_ENDIAN
+ hdr->count = bswap16(hdr->count);
+#endif
+}
+
+int
+ne2000_test_mem(sc)
+ struct dp8390_softc *sc;
+{
+
+ /* Noop. */
+ return (0);
+}
+
+/*
+ * Given a NIC memory source address and a host memory destination address,
+ * copy 'amount' from NIC to host using programmed i/o. The 'amount' is
+ * rounded up to a word - ok as long as mbufs are word sized.
+ */
+void
+ne2000_readmem(nict, nich, asict, asich, src, dst, amount, useword)
+ bus_space_tag_t nict;
+ bus_space_handle_t nich;
+ bus_space_tag_t asict;
+ bus_space_handle_t asich;
+ int src;
+ u_int8_t *dst;
+ size_t amount;
+ int useword;
+{
+
+ /* Select page 0 registers. */
+ bus_space_write_1(nict, nich, ED_P0_CR,
+ ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
+
+ /* Round up to a word. */
+ if (amount & 1)
+ ++amount;
+
+ /* Set up DMA byte count. */
+ bus_space_write_1(nict, nich, ED_P0_RBCR0, amount);
+ bus_space_write_1(nict, nich, ED_P0_RBCR1, amount >> 8);
+
+ /* Set up source address in NIC mem. */
+ bus_space_write_1(nict, nich, ED_P0_RSAR0, src);
+ bus_space_write_1(nict, nich, ED_P0_RSAR1, src >> 8);
+
+ bus_space_write_1(nict, nich, ED_P0_CR,
+ ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA);
+
+ if (useword)
+ bus_space_read_multi_stream_2(asict, asich, NE2000_ASIC_DATA,
+ (u_int16_t *)dst, amount >> 1);
+ else
+ bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA,
+ dst, amount);
+}
+
+/*
+ * Stripped down routine for writing a linear buffer to NIC memory. Only
+ * used in the probe routine to test the memory. 'len' must be even.
+ */
+void
+ne2000_writemem(nict, nich, asict, asich, src, dst, len, useword)
+ bus_space_tag_t nict;
+ bus_space_handle_t nich;
+ bus_space_tag_t asict;
+ bus_space_handle_t asich;
+ u_int8_t *src;
+ int dst;
+ size_t len;
+ int useword;
+{
+ int maxwait = 100; /* about 120us */
+
+ /* Select page 0 registers. */
+ bus_space_write_1(nict, nich, ED_P0_CR,
+ ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
+
+ /* Reset remote DMA complete flag. */
+ bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC);
+
+ /* Set up DMA byte count. */
+ bus_space_write_1(nict, nich, ED_P0_RBCR0, len);
+ bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8);
+
+ /* Set up destination address in NIC mem. */
+ bus_space_write_1(nict, nich, ED_P0_RSAR0, dst);
+ bus_space_write_1(nict, nich, ED_P0_RSAR1, dst >> 8);
+
+ /* Set remote DMA write. */
+ bus_space_write_1(nict, nich, ED_P0_CR,
+ ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
+
+ if (useword)
+ bus_space_write_multi_stream_2(asict, asich, NE2000_ASIC_DATA,
+ (u_int16_t *)src, len >> 1);
+ else
+ bus_space_write_multi_1(asict, asich, NE2000_ASIC_DATA,
+ src, len);
+
+ /*
+ * Wait for remote DMA to complete. This is necessary because on the
+ * transmit side, data is handled internally by the NIC in bursts, and
+ * we can't start another remote DMA until this one completes. Not
+ * waiting causes really bad things to happen - like the NIC wedging
+ * the bus.
+ */
+ while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) !=
+ ED_ISR_RDC) && --maxwait);
+
+ if (maxwait == 0)
+ printf("ne2000_writemem: failed to complete\n");
+}