xref: /src/sys/arch/sun3/dev/if_ie_obio.c

/*	$NetBSD: if_ie_obio.c,v 1.26 2024/12/20 23:52:00 tsutsui Exp $	*/

/*-
 * Copyright (c) 1996 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Gordon W. Ross.
 *
 * 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.
 */

/*
 * Machine-dependent glue for the Intel Ethernet (ie) driver.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_ie_obio.c,v 1.26 2024/12/20 23:52:00 tsutsui Exp $");

#include "opt_inet.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_ether.h>

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

#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <machine/dvma.h>
#include <machine/idprom.h>
#include <machine/vmparam.h>

#include "i82586.h"
#include "if_iereg.h"
#include "if_ievar.h"

static void ie_obreset(struct ie_softc *);
static void ie_obattend(struct ie_softc *);
static void ie_obrun(struct ie_softc *);

/*
 * New-style autoconfig attachment
 */

static int  ie_obio_match(device_t, cfdata_t, void *);
static void ie_obio_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(ie_obio, sizeof(struct ie_softc),
    ie_obio_match, ie_obio_attach, NULL, NULL);

static int
ie_obio_match(device_t parent, cfdata_t cf, void *args)
{
	struct confargs *ca = args;

	/* Make sure there is something there... */
	if (bus_peek(ca->ca_bustype, ca->ca_paddr, 1) == -1)
		return 0;

	/* Default interrupt priority. */
	if (ca->ca_intpri == -1)
		ca->ca_intpri = 3;

	return 1;
}

void
ie_obio_attach(device_t parent, device_t self, void *args)
{
	struct ie_softc *sc = device_private(self);
	struct confargs *ca = args;

	sc->sc_dev = self;
	sc->hard_type = IE_OBIO;
	sc->reset_586 = ie_obreset;
	sc->chan_attn = ie_obattend;
	sc->run_586 = ie_obrun;
	sc->sc_memcpy = memcpy;
	sc->sc_memset = memset;

	/* Map in the control registers. */
	sc->sc_reg = bus_mapin(ca->ca_bustype,
	    ca->ca_paddr, sizeof(struct ieob));

	/*
	 * The on-board "ie" is wired-up such that its
	 * memory access goes to the high 16 megabytes
	 * of the on-board memory space (on-board DVMA).
	 */
	sc->sc_iobase = (void *)DVMA_OBIO_SLAVE_BASE;

	/*
	 * The on-board "ie" just uses main memory, so
	 * we can choose how much memory to give it.
	 * XXX: Would like to use less than 64K...
	 */
	sc->sc_msize = 0x8000; /* MEMSIZE 32K */

	/* Allocate "shared" memory (in DVMA space). */
	sc->sc_maddr = dvma_malloc(sc->sc_msize);
	if (sc->sc_maddr == NULL)
		panic(": not enough dvma space");

	/*
	 * Set the System Configuration Pointer (SCP).
	 * Its location is system-dependent because the
	 * i82586 reads it from a fixed physical address.
	 * On this hardware, the i82586 address maps to
	 * a 24-bit offset in on-board DVMA space. The
	 * SCP happens to fall in a page used by the
	 * PROM monitor, which the PROM knows about.
	 */
	sc->scp = (volatile void *)((char *)sc->sc_iobase + IE_SCP_ADDR);

	/*
	 * The rest of ram is used for buffers.
	 */
	sc->buf_area    = sc->sc_maddr;
	sc->buf_area_sz = sc->sc_msize;

	/* Install interrupt handler. */
	isr_add_autovect(ie_intr, sc, ca->ca_intpri);

	/* Set the ethernet address. */
	idprom_etheraddr(sc->sc_addr);

	/* Do machine-independent parts of attach. */
	ie_attach(sc);
}


/*
 * onboard ie support
 */

/* Whack the "channel attetion" line. */
void
ie_obattend(struct ie_softc *sc)
{
	volatile struct ieob *ieo = (struct ieob *)sc->sc_reg;

	ieo->obctrl |= IEOB_ATTEN;	/* flag! */
	ieo->obctrl &= ~IEOB_ATTEN;	/* down. */
}

/*
 * This is called during driver attach.
 * Reset and initialize.
 */
void
ie_obreset(struct ie_softc *sc)
{
	volatile struct ieob *ieo = (struct ieob *)sc->sc_reg;
	ieo->obctrl = 0;
	delay(20);
	ieo->obctrl = (IEOB_NORSET | IEOB_ONAIR | IEOB_IENAB);
}

/*
 * This is called at the end of ieinit().
 * optional.
 */
void
ie_obrun(struct ie_softc *sc)
{

	/* do it all in reset */
}