162 lines
3.9 KiB
C
162 lines
3.9 KiB
C
/* $NetBSD: if_ae.c,v 1.65 1997/08/11 22:53:32 scottr Exp $ */
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/*
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* Device driver for National Semiconductor DS8390/WD83C690 based ethernet
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* adapters.
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*
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* Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved.
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*
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* Copyright (C) 1993, David Greenman. This software may be used, modified,
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* copied, distributed, and sold, in both source and binary form provided that
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* the above copyright and these terms are retained. Under no circumstances is
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* the author responsible for the proper functioning of this software, nor does
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* the author assume any responsibility for damages incurred with its use.
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*/
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#include "bpfilter.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_ether.h>
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#include <machine/bus.h>
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#include <dev/ic/dp8390reg.h>
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#include <dev/ic/dp8390var.h>
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#include <mac68k/dev/if_aevar.h>
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struct cfdriver ae_cd = {
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NULL, "ae", DV_IFNET
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};
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int
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ae_size_card_memory(bst, bsh, ofs)
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bus_space_tag_t bst;
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bus_space_handle_t bsh;
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int ofs;
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{
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int i1, i2, i3, i4;
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/*
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* banks; also assume it will generally mirror in upper banks
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* if not installed.
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*/
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i1 = (8192 * 0);
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i2 = (8192 * 1);
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i3 = (8192 * 2);
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i4 = (8192 * 3);
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bus_space_write_2(bst, bsh, ofs + i1, 0x1111);
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bus_space_write_2(bst, bsh, ofs + i2, 0x2222);
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bus_space_write_2(bst, bsh, ofs + i3, 0x3333);
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bus_space_write_2(bst, bsh, ofs + i4, 0x4444);
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if (bus_space_read_2(bst, bsh, ofs + i1) == 0x1111 &&
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bus_space_read_2(bst, bsh, ofs + i2) == 0x2222 &&
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bus_space_read_2(bst, bsh, ofs + i3) == 0x3333 &&
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bus_space_read_2(bst, bsh, ofs + i4) == 0x4444)
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return 8192 * 4;
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if ((bus_space_read_2(bst, bsh, ofs + i1) == 0x1111 &&
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bus_space_read_2(bst, bsh, ofs + i2) == 0x2222) ||
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(bus_space_read_2(bst, bsh, ofs + i1) == 0x3333 &&
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bus_space_read_2(bst, bsh, ofs + i2) == 0x4444))
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return 8192 * 2;
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if (bus_space_read_2(bst, bsh, ofs + i1) == 0x1111 ||
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bus_space_read_2(bst, bsh, ofs + i1) == 0x4444)
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return 8192;
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return 0;
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}
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/*
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* Zero memory and verify that it is clear. The only difference between
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* this and the default test_mem function is that the DP8390-based NuBus
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* cards * apparently require word-wide writes and byte-wide reads, an
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* `interesting' combination.
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*/
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int
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ae_test_mem(sc)
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struct dp8390_softc *sc;
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{
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bus_space_tag_t buft = sc->sc_buft;
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bus_space_handle_t bufh = sc->sc_bufh;
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int i;
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bus_space_set_region_2(buft, bufh, sc->mem_start, 0,
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sc->mem_size / 2);
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for (i = 0; i < sc->mem_size; ++i) {
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if (bus_space_read_1(sc->sc_buft, sc->sc_bufh, i)) {
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printf(": failed to clear NIC buffer at offset %x - "
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"check configuration\n", (sc->mem_start + i));
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return 1;
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}
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}
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return 0;
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}
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/*
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* Copy packet from mbuf to the board memory Currently uses an extra
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* buffer/extra memory copy, unless the whole packet fits in one mbuf.
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*
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* As in the test_mem function, we use word-wide writes.
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*/
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int
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ae_write_mbuf(sc, m, buf)
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struct dp8390_softc *sc;
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struct mbuf *m;
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int buf;
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{
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u_char *data, savebyte[2];
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int len, wantbyte;
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u_short totlen = 0;
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wantbyte = 0;
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for (; m ; m = m->m_next) {
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data = mtod(m, u_char *);
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len = m->m_len;
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totlen += len;
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if (len > 0) {
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/* Finish the last word. */
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if (wantbyte) {
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savebyte[1] = *data;
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bus_space_write_region_2(sc->sc_buft,
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sc->sc_bufh, buf, savebyte, 1);
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buf += 2;
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data++;
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len--;
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wantbyte = 0;
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}
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/* Output contiguous words. */
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if (len > 1) {
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bus_space_write_region_2(sc->sc_buft,
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sc->sc_bufh, buf, data, len >> 1);
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buf += len & ~1;
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data += len & ~1;
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len &= 1;
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}
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/* Save last byte, if necessary. */
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if (len == 1) {
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savebyte[0] = *data;
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wantbyte = 1;
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}
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}
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}
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if (wantbyte) {
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savebyte[1] = 0;
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bus_space_write_region_2(sc->sc_buft, sc->sc_bufh,
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buf, savebyte, 1);
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}
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return (totlen);
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}
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