diff options
| author | bjh21 <bjh21@NetBSD.org> | 2001-12-15 17:47:34 +0000 |
|---|---|---|
| committer | bjh21 <bjh21@NetBSD.org> | 2001-12-15 17:47:34 +0000 |
| commit | c72d5d40dd8ace970ccddd2114740469c9026557 (patch) | |
| tree | 59ad00305f8be7db157f605184a48eeca9f933e9 /sys/dev | |
| parent | f589c8c881abcb5d86ceda6893867debb12d68d4 (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.c | 404 | ||||
| -rw-r--r-- | sys/dev/ic/mx98905var.h | 58 |
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); |
