/*      $NetBSD: if_ze.c,v 1.18 2017/05/22 17:02:41 ragge Exp $ */
/*
* Copyright (c) 1999 Ludd, University of Lule}, Sweden. 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.
*
* 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_ze.c,v 1.18 2017/05/22 17:02:41 ragge Exp $");

#include "opt_cputype.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <sys/device.h>

#include <net/if.h>
#include <net/if_ether.h>
#include <net/if_dl.h>

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

#include <machine/nexus.h>
#include <machine/scb.h>
#include <machine/sid.h>
#include <machine/mainbus.h>

#include <dev/ic/sgecreg.h>
#include <dev/ic/sgecvar.h>

#include "ioconf.h"

/*
* Addresses.
*/
#define SGECADDR        0x20008000
#define NISA_ROM        0x20084000
#define NISA_ROM_VXT    0x200c4000
#define NISA_ROM_VSBUS  0x27800000
#define SGECVEC         0x108

static int      ze_mainbus_match(device_t, cfdata_t, void *);
static void     ze_mainbus_attach(device_t, device_t, void *);

static const struct sgec_data {
       uint32_t sd_boardtype;
       bus_addr_t sd_addr;
       bus_addr_t sd_rom;
       uint16_t sd_intvec;
       uint8_t sd_romshift;
} sgec_data[] = {
       { VAX_BTYP_660, SGECADDR, NISA_ROM, SGECVEC, 24, },
#if VXT2000 || VAXANY
       { VAX_BTYP_VXT, SGECADDR, NISA_ROM_VXT, 0x200, 0, },
#endif
       { VAX_BTYP_670, SGECADDR, NISA_ROM, SGECVEC, 8, },
       { VAX_BTYP_680, SGECADDR, NISA_ROM, SGECVEC, 8, },
       { VAX_BTYP_681, SGECADDR, NISA_ROM, SGECVEC, 8, },
       { VAX_BTYP_48, SGECADDR, NISA_ROM_VSBUS, SGECVEC, 0, },
       { VAX_BTYP_49, SGECADDR, NISA_ROM_VSBUS, SGECVEC, 0, },
       { VAX_BTYP_53, SGECADDR, NISA_ROM, SGECVEC, 8, },
};

static const struct sgec_data *
ze_find(void)
{
       size_t i;
       const struct sgec_data *sd;
       for (i = 0, sd = sgec_data; i < __arraycount(sgec_data); i++, sd++) {
               if (vax_boardtype == sd->sd_boardtype)
                       return sd;
       }

       return NULL;
}

CFATTACH_DECL_NEW(ze_mainbus, sizeof(struct ze_softc),
   ze_mainbus_match, ze_mainbus_attach, NULL, NULL);

/*
* Check for present SGEC.
*/
int
ze_mainbus_match(device_t parent, cfdata_t cf, void *aux)
{
       struct mainbus_attach_args * const ma = aux;

       /*
        * Should some more intelligent checking be done???
        */
       if (strcmp(ma->ma_type, "sgec"))
               return 0;

       return ze_find() != NULL;
}

/*
* Interface exists: make available by filling in network interface
* record.  System will initialize the interface when it is ready
* to accept packets.
*/
void
ze_mainbus_attach(device_t parent, device_t self, void *aux)
{
       struct mainbus_attach_args * const ma = aux;
       struct ze_softc * const sc = device_private(self);
       const struct sgec_data * const sd = ze_find();
       const uint32_t *ea;
       size_t i;
       int error;

       sc->sc_dev = self;

       /*
        * Map in SGEC registers.
        */
       sc->sc_dmat = ma->ma_dmat;
       sc->sc_iot = ma->ma_iot;
       sc->sc_intvec = sd->sd_intvec;
       error = bus_space_map(sc->sc_iot, sd->sd_addr, PAGE_SIZE, 0,
           &sc->sc_ioh);
       if (error) {
               aprint_error(": failed to map %#lx: %d\n", sd->sd_addr, error);
               return;
       }

       /*
        * Map in, read and release ethernet rom address.
        */
       ea = (uint32_t *)vax_map_physmem(sd->sd_rom, 1);
       for (i = 0; i < ETHER_ADDR_LEN; i++)
               sc->sc_enaddr[i] = (ea[i] >> sd->sd_romshift) & 0377;
       vax_unmap_physmem((vaddr_t)ea, 1);

       scb_vecalloc(sc->sc_intvec, (void (*)(void *)) sgec_intr, sc,
           SCB_ISTACK, &sc->sc_intrcnt);

       sgec_attach(sc);
}