/*	$OpenBSD: if_sn_obio.c,v 1.13 1997/04/22 13:37:56 briggs Exp $	*/

/*
 * Copyright (C) 1997 Allen Briggs
 * All rights reserved.
 *
 * 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 Allen Briggs
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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/param.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/systm.h>

#include <net/if.h>

#include <netinet/in.h>
#include <netinet/if_ether.h>

#include <machine/bus.h>
#include <machine/macinfo.h>
#include <machine/viareg.h>

#include "obiovar.h"
#include "if_snreg.h"
#include "if_snvar.h"

#define SONIC_REG_BASE	0x50F0A000
#define SONIC_PROM_BASE	0x50F08000

static int	sn_obio_match __P((struct device *, void *, void *));
static void	sn_obio_attach __P((struct device *, struct device *, void *));
static int	sn_obio_getaddr __P((struct sn_softc *));
static int	sn_obio_getaddr_kludge __P((struct sn_softc *));

struct cfattach sn_obio_ca = {
	sizeof(struct sn_softc), sn_obio_match, sn_obio_attach
};

static int
sn_obio_match(parent, vcf, aux)
	struct device *parent;
	void *vcf;
	void *aux;
{
	if (mac68k_machine.sonic)
		return 1;

	return 0;
}

/*
 * Install interface into kernel networking data structures
 */
static void
sn_obio_attach(parent, self, aux)
	struct device *parent, *self;
	void   *aux;
{
	struct obio_attach_args *oa = (struct obio_attach_args *) aux;
        struct sn_softc *sc = (void *)self;
	int i;

	sc->snr_dcr = DCR_WAIT0 | DCR_DMABLOCK |
			DCR_RFT16 | DCR_TFT16;
	sc->snr_dcr2 = 0;

	switch (current_mac_model->machineid) {
	case MACH_MACQ700: case MACH_MACQ900: case MACH_MACQ950:
	case MACH_MACQ800: case MACH_MACQ650: case MACH_MACC650:
	case MACH_MACC610: case MACH_MACQ610:
		sc->snr_dcr |= DCR_EXBUS | DCR_DW32;
		sc->bitmode = 1;
		break;

	case MACH_MACPB500:
		sc->snr_dcr |= DCR_SYNC | DCR_LBR | DCR_DW16;
  		sc->bitmode = 0;
		break;
        }

	sc->sc_regt = oa->oa_tag;

	if (bus_space_map(sc->sc_regt, SONIC_REG_BASE, SN_REGSIZE,
				0, &sc->sc_regh)) {
		panic("failed to map space for SONIC regs.\n");
	}

	sc->slotno = 9;

	/* regs are addressed as words, big-endian. */
	for (i = 0; i < SN_NREGS; i++) {
		sc->sc_reg_map[i] = (bus_size_t)((i * 4) + 2);
	}

	if (sn_obio_getaddr(sc)) {
		printf(": Failed to get MAC address.  Trying kludge.\n");
		if (sn_obio_getaddr_kludge(sc)) {
			printf("Kludge failed, too.  Attachment failed.\n");
			bus_space_unmap(sc->sc_regt, sc->sc_regh, SN_REGSIZE);
			return;
		}
	}

	/* snsetup returns 1 if something fails */
	if (snsetup(sc)) {
		bus_space_unmap(sc->sc_regt, sc->sc_regh, SN_REGSIZE);
		return;
	}

	add_nubus_intr(sc->slotno, snintr, (void *)sc);
}

static int
sn_obio_getaddr(sc)
	struct sn_softc	*sc;
{
	bus_space_handle_t	bsh;

	if (bus_space_map(sc->sc_regt, SONIC_PROM_BASE, NBPG, 0, &bsh)) {
		panic("failed to map space to read SONIC address.\n");
	}

	if (!bus_probe(sc->sc_regt, bsh, 0, 1)) {
		bus_space_unmap(sc->sc_regt, bsh, NBPG);
		return -1;
	}

	sn_get_enaddr(sc->sc_regt, bsh, 0, sc->sc_arpcom.ac_enaddr);

	bus_space_unmap(sc->sc_regt, bsh, NBPG);

	return 0;
}

/*
 * Assume that the SONIC was initialized in MacOS.  This should go away
 * when we can properly get the MAC address on the PBs.
 */
static int
sn_obio_getaddr_kludge(sc)
	struct sn_softc	*sc;
{
	int			i, ors=0;

	/* Shut down NIC */
	NIC_PUT(sc, SNR_CR, CR_STP);
	wbflush();
	NIC_PUT(sc, SNR_CR, CR_RST);
	wbflush();
	NIC_PUT(sc, SNR_IMR, 0);
	wbflush();
	NIC_PUT(sc, SNR_ISR, ISR_ALL);
	wbflush();

	NIC_PUT(sc, SNR_CR, CR_RST);
	wbflush();
	NIC_PUT(sc, SNR_CEP, 15); /* For some reason, Apple fills top first. */
	wbflush();
	i = NIC_GET(sc, SNR_CAP2);
	wbflush();

	ors |= i;
	sc->sc_enaddr[5] = i >> 8;
	sc->sc_enaddr[4] = i;

	i = NIC_GET(sc, SNR_CAP1);
	wbflush();

	ors |= i;
	sc->sc_enaddr[3] = i >> 8;
	sc->sc_enaddr[2] = i;

	i = NIC_GET(sc, SNR_CAP0);
	wbflush();

	ors |= i;
	sc->sc_enaddr[1] = i >> 8;
	sc->sc_enaddr[0] = i;

	NIC_PUT(sc, SNR_CR, 0);
	wbflush();

	if (ors == 0) return -1;
	return (0);
}