/* $NetBSD: depca_eisa.c,v 1.17 2021/07/24 19:14:35 thorpej Exp $ */

/* $NetBSD: depca_eisa.c,v 1.17 2021/07/24 19:14:35 thorpej Exp $ */

/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*/

/*
* EISA bus front-end for the Digital DEPCA Ethernet controller.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: depca_eisa.c,v 1.17 2021/07/24 19:14:35 thorpej 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 <net/if.h>
#include <net/if_media.h>
#include <net/if_ether.h>

#ifdef INET
#include <netinet/in.h>
#include <netinet/if_inarp.h>
#endif

#include <sys/bus.h>
#include <sys/intr.h>

#include <dev/eisa/eisareg.h>
#include <dev/eisa/eisavar.h>
#include <dev/eisa/eisadevs.h>

#include <dev/ic/lancereg.h>
#include <dev/ic/lancevar.h>
#include <dev/ic/am7990reg.h>
#include <dev/ic/am7990var.h>
#include <dev/ic/depcareg.h>
#include <dev/ic/depcavar.h>

static int depca_eisa_match(device_t, cfdata_t, void *);
static void depca_eisa_attach(device_t, device_t, void *);

struct depca_eisa_softc {
struct depca_softc sc_depca;

eisa_chipset_tag_t sc_ec;
int sc_irq;
int sc_ist;
};

CFATTACH_DECL_NEW(depca_eisa, sizeof(struct depca_eisa_softc),
depca_eisa_match, depca_eisa_attach, NULL, NULL);

static void *depca_eisa_intr_establish(struct depca_softc *,
struct lance_softc *);

static int
depca_eisa_match(device_t parent, cfdata_t cf, void *aux)
{
struct eisa_attach_args *ea = aux;

return (strcmp(ea->ea_idstring, "DEC4220") == 0);
}

#define DEPCA_ECU_FUNC_NETINTR 0
#define DEPCA_ECU_FUNC_NETBUF 1

static void
depca_eisa_attach(device_t parent, device_t self, void *aux)
{
struct depca_eisa_softc *esc = device_private(self);
struct depca_softc *sc = &esc->sc_depca;
struct eisa_attach_args *ea = aux;
struct eisa_cfg_mem ecm;
struct eisa_cfg_irq eci;

sc->sc_dev = self;
aprint_naive("\n");
aprint_normal(": DEC DE422 Ethernet\n");

sc->sc_iot = ea->ea_iot;
sc->sc_memt = ea->ea_memt;

esc->sc_ec = ea->ea_ec;

sc->sc_intr_establish = depca_eisa_intr_establish;

if (eisa_conf_read_mem(ea->ea_ec, ea->ea_slot,
DEPCA_ECU_FUNC_NETBUF, 0, &ecm) != 0) {
aprint_error_dev(self, "unable to find network buffer\n");
return;
}

aprint_normal_dev(self, "shared memory at 0x%lx-0x%lx\n",
ecm.ecm_addr, ecm.ecm_addr + ecm.ecm_size - 1);

sc->sc_memsize = ecm.ecm_size;

if (bus_space_map(sc->sc_iot, EISA_SLOT_ADDR(ea->ea_slot) + 0xc00, 16,
0, &sc->sc_ioh) != 0) {
aprint_error_dev(self, "unable to map i/o space\n");
return;
}
if (bus_space_map(sc->sc_memt, ecm.ecm_addr, sc->sc_memsize,
0, &sc->sc_memh) != 0) {
aprint_error_dev(self, "unable to map memory space\n");
return;
}

if (eisa_conf_read_irq(ea->ea_ec, ea->ea_slot,
DEPCA_ECU_FUNC_NETINTR, 0, &eci) != 0) {
aprint_error_dev(self, "unable to determine IRQ\n");
return;
}

esc->sc_irq = eci.eci_irq;
esc->sc_ist = eci.eci_ist;

depca_attach(sc);
}

static void *
depca_eisa_intr_establish(struct depca_softc *sc, struct lance_softc *child)
{
struct depca_eisa_softc *esc = (struct depca_eisa_softc *)sc;
eisa_intr_handle_t ih;
const char *intrstr;
void *rv;
char intrbuf[EISA_INTRSTR_LEN];

if (eisa_intr_map(esc->sc_ec, esc->sc_irq, &ih)) {
aprint_error_dev(sc->sc_dev,
"unable to map interrupt (%d)\n", esc->sc_irq);
return (NULL);
}
intrstr = eisa_intr_string(esc->sc_ec, ih, intrbuf, sizeof(intrbuf));
rv = eisa_intr_establish(esc->sc_ec, ih, esc->sc_ist, IPL_NET,
(esc->sc_ist == IST_LEVEL) ? am7990_intr : depca_intredge, child);
if (rv == NULL) {
aprint_error_dev(sc->sc_dev,
"unable to establish interrupt");
if (intrstr != NULL)
aprint_error(" at %s", intrstr);
aprint_error("\n");
return (NULL);
}
if (intrstr != NULL) {
aprint_normal_dev(sc->sc_dev,
"interrupting at %s (%s trigger)\n",
(esc->sc_ist == IST_LEVEL) ? "level" : "edge", intrstr);
}

return (rv);
}