NetBSD/sys/arch/mac68k/dev/if_ae.c

162 lines
3.9 KiB
C

/* $NetBSD: if_ae.c,v 1.64 1997/04/29 04:40:22 scottr Exp $ */
/*
* 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.
*/
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_ether.h>
#include <machine/bus.h>
#include <dev/ic/dp8390reg.h>
#include <dev/ic/dp8390var.h>
#include <arch/mac68k/dev/if_aevar.h>
struct cfdriver ae_cd = {
NULL, "ae", DV_IFNET
};
int
ae_size_card_memory(bst, bsh, ofs)
bus_space_tag_t bst;
bus_space_handle_t bsh;
int ofs;
{
int i1, i2, i3, i4;
/*
* banks; also assume it will generally mirror in upper banks
* if not installed.
*/
i1 = (8192 * 0);
i2 = (8192 * 1);
i3 = (8192 * 2);
i4 = (8192 * 3);
bus_space_write_2(bst, bsh, ofs + i1, 0x1111);
bus_space_write_2(bst, bsh, ofs + i2, 0x2222);
bus_space_write_2(bst, bsh, ofs + i3, 0x3333);
bus_space_write_2(bst, bsh, ofs + i4, 0x4444);
if (bus_space_read_2(bst, bsh, ofs + i1) == 0x1111 &&
bus_space_read_2(bst, bsh, ofs + i2) == 0x2222 &&
bus_space_read_2(bst, bsh, ofs + i3) == 0x3333 &&
bus_space_read_2(bst, bsh, ofs + i4) == 0x4444)
return 8192 * 4;
if ((bus_space_read_2(bst, bsh, ofs + i1) == 0x1111 &&
bus_space_read_2(bst, bsh, ofs + i2) == 0x2222) ||
(bus_space_read_2(bst, bsh, ofs + i1) == 0x3333 &&
bus_space_read_2(bst, bsh, ofs + i2) == 0x4444))
return 8192 * 2;
if (bus_space_read_2(bst, bsh, ofs + i1) == 0x1111 ||
bus_space_read_2(bst, bsh, ofs + i1) == 0x4444)
return 8192;
return 0;
}
/*
* Zero memory and verify that it is clear. The only difference between
* this and the default test_mem function is that the DP8390-based NuBus
* cards * apparently require word-wide writes and byte-wide reads, an
* `interesting' combination.
*/
int
ae_test_mem(sc)
struct dp8390_softc *sc;
{
bus_space_tag_t buft = sc->sc_buft;
bus_space_handle_t bufh = sc->sc_bufh;
int i;
bus_space_set_region_2(buft, bufh, sc->mem_start, 0,
sc->mem_size / 2);
for (i = 0; i < sc->mem_size; ++i) {
if (bus_space_read_1(sc->sc_buft, sc->sc_bufh, i)) {
printf(": failed to clear NIC buffer at offset %x - "
"check configuration\n", (sc->mem_start + i));
return 1;
}
}
return 0;
}
/*
* Copy packet from mbuf to the board memory Currently uses an extra
* buffer/extra memory copy, unless the whole packet fits in one mbuf.
*
* As in the test_mem function, we use word-wide writes.
*/
int
ae_write_mbuf(sc, m, buf)
struct dp8390_softc *sc;
struct mbuf *m;
int buf;
{
u_char *data, savebyte[2];
int len, wantbyte;
u_short totlen = 0;
wantbyte = 0;
for (; m ; m = m->m_next) {
data = mtod(m, u_char *);
len = m->m_len;
totlen += len;
if (len > 0) {
/* Finish the last word. */
if (wantbyte) {
savebyte[1] = *data;
bus_space_write_region_2(sc->sc_buft,
sc->sc_bufh, buf, savebyte, 1);
buf += 2;
data++;
len--;
wantbyte = 0;
}
/* Output contiguous words. */
if (len > 1) {
bus_space_write_region_2(sc->sc_buft,
sc->sc_bufh, buf, data, len >> 1);
buf += len & ~1;
data += len & ~1;
len &= 1;
}
/* Save last byte, if necessary. */
if (len == 1) {
savebyte[0] = *data;
wantbyte = 1;
}
}
}
if (wantbyte) {
savebyte[1] = 0;
bus_space_write_region_2(sc->sc_buft, sc->sc_bufh,
buf, savebyte, 1);
}
return (totlen);
}