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authorbjh21 <bjh21@NetBSD.org>2001-12-15 17:47:34 +0000
committerbjh21 <bjh21@NetBSD.org>2001-12-15 17:47:34 +0000
commitc72d5d40dd8ace970ccddd2114740469c9026557 (patch)
tree59ad00305f8be7db157f605184a48eeca9f933e9 /sys/dev
parentf589c8c881abcb5d86ceda6893867debb12d68d4 (diff)
Add code to support the bugged Macronix MX98905 chip, as used in several
podulebus Ethernet cards. This replaces the NE2000 memory-access routines with ones that don't try to transfer more than 255 bytes at a time. This code should perhaps be merged into ne2000.c, but presumably most NE2000 clones won't need it.
Diffstat (limited to 'sys/dev')
-rw-r--r--sys/dev/ic/mx98905.c404
-rw-r--r--sys/dev/ic/mx98905var.h58
2 files changed, 462 insertions, 0 deletions
diff --git a/sys/dev/ic/mx98905.c b/sys/dev/ic/mx98905.c
new file mode 100644
index 00000000000..4af4ceba12c
--- /dev/null
+++ b/sys/dev/ic/mx98905.c
@@ -0,0 +1,404 @@
+/* $NetBSD: mx98905.c,v 1.1 2001/12/15 17:47:35 bjh21 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.
+ */
+
+/*
+ * Special routines for the Macronix MX 98905. For use with the "ne" driver.
+ */
+
+/*
+ * <URL:http://mail-index.netbsd.org/port-arm32/1996/06/23/0005.html>:
+ * There are 2 types of etherh card. One uses the macronics chipset MX98905
+ * and that chipset has a bug in it, in that it the MSB remote dma
+ * register does not work. There is a workaround for this which
+ * should be around soon. In fact, I think only the buffer ram test
+ * ever transfers more than 256 bytes across the dma channel, so diabling
+ * it will make the mx stuff work.
+ */
+
+#include <sys/param.h>
+
+__KERNEL_RCSID(0, "$NetBSD: mx98905.c,v 1.1 2001/12/15 17:47:35 bjh21 Exp $");
+
+#include <sys/device.h>
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <sys/syslog.h>
+#include <sys/systm.h>
+
+#include <net/if.h>
+#include <net/if_ether.h>
+#include <net/if_media.h>
+
+#include <machine/bus.h>
+
+#include <dev/ic/dp8390reg.h>
+#include <dev/ic/dp8390var.h>
+#include <dev/ic/ne2000reg.h>
+#include <dev/ic/ne2000var.h>
+#include <dev/ic/mx98905var.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 */
+
+void
+mx98905_attach(struct dp8390_softc *sc)
+{
+
+ sc->ring_copy = mx98905_ring_copy;
+ sc->write_mbuf = mx98905_write_mbuf;
+ sc->read_hdr = mx98905_read_hdr;
+}
+
+static __inline void
+mx98905_write_setup(sc, len, buf)
+ struct dp8390_softc *sc;
+ int len, buf;
+{
+ bus_space_tag_t nict = sc->sc_regt;
+ bus_space_handle_t nich = sc->sc_regh;
+
+ /* Select page 0 registers. */
+ NIC_BARRIER(nict, nich);
+ bus_space_write_1(nict, nich, ED_P0_CR,
+ ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
+ NIC_BARRIER(nict, nich);
+
+ /* Reset remote DMA complete flag. */
+ bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC);
+ NIC_BARRIER(nict, nich);
+
+ /* 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, buf);
+ bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8);
+
+ /* Set remote DMA write. */
+ NIC_BARRIER(nict, nich);
+ bus_space_write_1(nict, nich,
+ ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
+ NIC_BARRIER(nict, nich);
+}
+
+
+static __inline void
+mx98905_write_wait(sc)
+ struct dp8390_softc *sc;
+{
+ int maxwait = 100; /* about 120us */
+ bus_space_tag_t nict = sc->sc_regt;
+ bus_space_handle_t nich = sc->sc_regh;
+
+ /*
+ * 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) {
+ bus_space_read_1(nict, nich, ED_P0_CRDA1);
+ bus_space_read_1(nict, nich, ED_P0_CRDA0);
+ NIC_BARRIER(nict, nich);
+ DELAY(1);
+ }
+
+ if (maxwait == 0) {
+ log(LOG_WARNING,
+ "%s: remote transmit DMA failed to complete\n",
+ sc->sc_dev.dv_xname);
+ dp8390_reset(sc);
+ }
+}
+
+/*
+ * Write an mbuf chain to the destination NIC memory address using programmed
+ * I/O.
+ */
+int
+mx98905_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, dmalen, resid, len;
+ u_int8_t *data, savebyte[2];
+ int l, leftover;
+#ifdef DIAGNOSTIC
+ u_int8_t *lim;
+#endif
+
+ resid = savelen = m->m_pkthdr.len;
+
+ dmalen = min(resid, 254);
+
+ mx98905_write_setup(sc, dmalen, buf);
+
+ buf += dmalen;
+ resid -= dmalen;
+
+ /*
+ * 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.
+ */
+ /* NE2000s are a bit trickier. */
+ /* 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);
+ dmalen -= 2;
+ leftover = 0;
+ } else if (BUS_SPACE_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.
+ */
+ len = min(l, dmalen);
+ leftover = len & 1;
+ len &= ~1;
+ bus_space_write_multi_stream_2(asict,
+ asich, NE2000_ASIC_DATA,
+ (u_int16_t *)data, len >> 1);
+ dmalen -= len;
+ data += len;
+ if (leftover)
+ savebyte[0] = *data++;
+ l -= len + leftover;
+ }
+ if (dmalen == 0 && resid > 0) {
+ mx98905_write_wait(sc);
+ dmalen = min(resid, 254);
+
+ mx98905_write_setup(sc, dmalen, buf);
+
+ buf += dmalen;
+ resid -= dmalen;
+ }
+ }
+ if (l < 0)
+ panic("mx98905_write_mbuf: negative len");
+#ifdef DIAGNOSTIC
+ if (data != lim)
+ panic("mx98905_write_mbuf: data != lim");
+#endif
+ }
+ if (leftover) {
+ savebyte[1] = 0;
+ bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA,
+ *(u_int16_t *)savebyte);
+ }
+ NIC_BARRIER(nict, nich);
+
+ mx98905_write_wait(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
+mx98905_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 = NE2000_USE_WORD(nsc);
+
+ /* 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. */
+ mx98905_readmem(nict, nich, asict, asich, src,
+ (u_int8_t *)dst, tmp_amount, useword);
+
+ amount -= tmp_amount;
+ src = sc->mem_ring;
+ dst += tmp_amount;
+ }
+
+ mx98905_readmem(nict, nich, asict, asich, src, (u_int8_t *)dst,
+ amount, useword);
+
+ return (src + amount);
+}
+
+void
+mx98905_read_hdr(sc, buf, hdr)
+ struct dp8390_softc *sc;
+ int buf;
+ struct dp8390_ring *hdr;
+{
+ struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
+
+ mx98905_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich,
+ buf, (u_int8_t *)hdr, sizeof(struct dp8390_ring),
+ NE2000_USE_WORD(nsc));
+#if BYTE_ORDER == BIG_ENDIAN
+ hdr->count = bswap16(hdr->count);
+#endif
+}
+
+static __inline void
+mx98905_read_setup(bus_space_tag_t nict, bus_space_handle_t nich,
+ int len, int buf)
+{
+
+ /* Select page 0 registers. */
+ NIC_BARRIER(nict, nich);
+ bus_space_write_1(nict, nich, ED_P0_CR,
+ ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
+ NIC_BARRIER(nict, nich);
+
+ /* 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 source 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);
+
+ NIC_BARRIER(nict, nich);
+ bus_space_write_1(nict, nich, ED_P0_CR,
+ ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA);
+
+ bus_space_barrier(nict, nich, 0, NE2000_NPORTS,
+ BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
+}
+
+/*
+ * 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
+mx98905_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;
+{
+ int len, resid;
+
+ resid = amount;
+ /* Round up to a word. */
+ if (resid & 1)
+ ++resid;
+
+ while (resid > 0) {
+ len = min(resid, 254);
+ mx98905_read_setup(nict, nich, len, src);
+ if (useword)
+ bus_space_read_multi_stream_2(asict, asich,
+ NE2000_ASIC_DATA, (u_int16_t *)dst, len >> 1);
+ else
+ bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA,
+ dst, len);
+ resid -= len;
+ src += len;
+ dst += len;
+ }
+}
diff --git a/sys/dev/ic/mx98905var.h b/sys/dev/ic/mx98905var.h
new file mode 100644
index 00000000000..24066d09205
--- /dev/null
+++ b/sys/dev/ic/mx98905var.h
@@ -0,0 +1,58 @@
+/* $NetBSD: mx98905var.h,v 1.1 2001/12/15 17:47:35 bjh21 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.
+ */
+
+void mx98905_attach(struct dp8390_softc *);
+int mx98905_write_mbuf(struct dp8390_softc *, struct mbuf *, int);
+int mx98905_ring_copy(struct dp8390_softc *, int, caddr_t, u_short);
+void mx98905_read_hdr(struct dp8390_softc *, int, struct dp8390_ring *);
+void mx98905_readmem(bus_space_tag_t, bus_space_handle_t,
+ bus_space_tag_t, bus_space_handle_t, int, u_int8_t *, size_t, int);