/*      $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 */
}