NetBSD/sys/dev/sbus/if_le_lebuffer.c

196 lines
5.5 KiB
C

/* $NetBSD: if_le_lebuffer.c,v 1.29 2019/05/29 06:21:58 msaitoh Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace
* Simulation Facility, NASA Ames Research Center; Paul Kranenburg.
*
* 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.
*
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_le_lebuffer.c,v 1.29 2019/05/29 06:21:58 msaitoh Exp $");
#include "opt_inet.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <net/if.h>
#include <net/if_ether.h>
#include <net/if_media.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_inarp.h>
#endif
#include <sys/bus.h>
#include <sys/intr.h>
#include <machine/autoconf.h>
#include <dev/sbus/sbusvar.h>
#include <dev/sbus/lebuffervar.h>
#include <dev/ic/lancereg.h>
#include <dev/ic/lancevar.h>
#include <dev/ic/am7990reg.h>
#include <dev/ic/am7990var.h>
#include "ioconf.h"
/*
* LANCE registers.
*/
#define LEREG1_RDP 0 /* Register Data port */
#define LEREG1_RAP 2 /* Register Address port */
struct le_softc {
struct am7990_softc sc_am7990; /* glue to MI code */
bus_space_tag_t sc_bustag;
bus_dma_tag_t sc_dmatag;
bus_space_handle_t sc_reg; /* LANCE registers */
};
int lematch_lebuffer(device_t, cfdata_t, void *);
void leattach_lebuffer(device_t, device_t, void *);
/*
* Media types supported.
*/
static int lemedia[] = {
IFM_ETHER | IFM_10_T,
};
#define NLEMEDIA __arraycount(lemedia)
CFATTACH_DECL_NEW(le_lebuffer, sizeof(struct le_softc),
lematch_lebuffer, leattach_lebuffer, NULL, NULL);
#if defined(_KERNEL_OPT)
#include "opt_ddb.h"
#endif
static void lewrcsr(struct lance_softc *, uint16_t, uint16_t);
static uint16_t lerdcsr(struct lance_softc *, uint16_t);
static void
lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
{
struct le_softc *lesc = (struct le_softc *)sc;
bus_space_tag_t t = lesc->sc_bustag;
bus_space_handle_t h = lesc->sc_reg;
bus_space_write_2(t, h, LEREG1_RAP, port);
bus_space_write_2(t, h, LEREG1_RDP, val);
#if defined(SUN4M)
/*
* We need to flush the Sbus->Mbus write buffers. This can most
* easily be accomplished by reading back the register that we
* just wrote (thanks to Chris Torek for this solution).
*/
(void)bus_space_read_2(t, h, LEREG1_RDP);
#endif
}
static uint16_t
lerdcsr(struct lance_softc *sc, uint16_t port)
{
struct le_softc *lesc = (struct le_softc *)sc;
bus_space_tag_t t = lesc->sc_bustag;
bus_space_handle_t h = lesc->sc_reg;
bus_space_write_2(t, h, LEREG1_RAP, port);
return (bus_space_read_2(t, h, LEREG1_RDP));
}
int
lematch_lebuffer(device_t parent, cfdata_t cf, void *aux)
{
struct sbus_attach_args *sa = aux;
return (strcmp(cf->cf_name, sa->sa_name) == 0);
}
void
leattach_lebuffer(device_t parent, device_t self, void *aux)
{
struct le_softc *lesc = device_private(self);
struct lance_softc *sc = &lesc->sc_am7990.lsc;
struct lebuf_softc *lebuf = device_private(parent);
struct sbus_attach_args *sa = aux;
sc->sc_dev = self;
lesc->sc_bustag = sa->sa_bustag;
lesc->sc_dmatag = sa->sa_dmatag;
if (sbus_bus_map(sa->sa_bustag,
sa->sa_slot,
sa->sa_offset,
sa->sa_size,
0, &lesc->sc_reg)) {
aprint_error(": cannot map registers\n");
return;
}
sc->sc_mem = lebuf->sc_buffer;
sc->sc_memsize = lebuf->sc_bufsiz;
sc->sc_addr = 0; /* Lance view is offset by buffer location */
lebuf->attached = 1;
/* That old black magic... */
sc->sc_conf3 = prom_getpropint(sa->sa_node, "busmaster-regval",
LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON);
sc->sc_supmedia = lemedia;
sc->sc_nsupmedia = NLEMEDIA;
sc->sc_defaultmedia = lemedia[0];
prom_getether(sa->sa_node, sc->sc_enaddr);
sc->sc_copytodesc = lance_copytobuf_contig;
sc->sc_copyfromdesc = lance_copyfrombuf_contig;
sc->sc_copytobuf = lance_copytobuf_contig;
sc->sc_copyfrombuf = lance_copyfrombuf_contig;
sc->sc_zerobuf = lance_zerobuf_contig;
sc->sc_rdcsr = lerdcsr;
sc->sc_wrcsr = lewrcsr;
am7990_config(&lesc->sc_am7990);
/* Establish interrupt handler */
if (sa->sa_nintr != 0)
(void)bus_intr_establish(lesc->sc_bustag, sa->sa_pri,
IPL_NET, am7990_intr, sc);
}