/*      $NetBSD: if_gem_sbus.c,v 1.14 2022/09/25 18:03:04 thorpej Exp $ */

/*-
* Copyright (c) 2006 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Martin Husemann.
*
* 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.
*/

/*
* SBus front-end for the GEM network driver
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_gem_sbus.c,v 1.14 2022/09/25 18:03:04 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <sys/socket.h>

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

#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>

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

#include <dev/sbus/sbusvar.h>

#include <dev/ic/gemreg.h>
#include <dev/ic/gemvar.h>

struct gem_sbus_softc {
       struct  gem_softc       gsc_gem;        /* GEM device */
       void                    *gsc_ih;
       bus_space_handle_t      gsc_sbus_regs_h;
};

int     gemmatch_sbus(device_t, cfdata_t, void *);
void    gemattach_sbus(device_t, device_t, void *);

CFATTACH_DECL3_NEW(gem_sbus, sizeof(struct gem_sbus_softc),
   gemmatch_sbus, gemattach_sbus, NULL, NULL, NULL, NULL, 0);

int
gemmatch_sbus(device_t parent, cfdata_t cf, void *aux)
{
       struct sbus_attach_args *sa = aux;

       return (strcmp("network", sa->sa_name) == 0);
}

void
gemattach_sbus(device_t parent, device_t self, void *aux)
{
       struct sbus_attach_args *sa = aux;
       struct gem_sbus_softc *gsc = device_private(self);
       struct gem_softc *sc = &gsc->gsc_gem;
       uint8_t enaddr[ETHER_ADDR_LEN];

       sc->sc_dev = self;

       /* Pass on the bus tags */
       sc->sc_bustag = sa->sa_bustag;
       sc->sc_dmatag = sa->sa_dmatag;

       if (sa->sa_nreg < 2) {
               printf("%s: only %d register sets\n",
                       device_xname(self), sa->sa_nreg);
               return;
       }

       /*
        * Map two register banks:
        *
        *      bank 0: status, config, reset
        *      bank 1: various gem parts
        *
        */
       if (sbus_bus_map(sa->sa_bustag,
                        sa->sa_reg[0].oa_space,
                        sa->sa_reg[0].oa_base,
                        (bus_size_t)sa->sa_reg[0].oa_size,
                        0, &sc->sc_h2) != 0) {
               aprint_error_dev(self, "cannot map registers\n");
               return;
       }
       if (sbus_bus_map(sa->sa_bustag,
                        sa->sa_reg[1].oa_space,
                        sa->sa_reg[1].oa_base,
                        (bus_size_t)sa->sa_reg[1].oa_size,
                        0, &sc->sc_h1) != 0) {
               aprint_error_dev(self, "cannot map registers\n");
               return;
       }
       prom_getether(sa->sa_node, enaddr);

       if (!strcmp("serdes", prom_getpropstring(sa->sa_node, "shared-pins")))
               sc->sc_flags |= GEM_SERDES;
       sc->sc_variant = GEM_SUN_GEM;
       sc->sc_flags &= ~GEM_PCI;

       /*
        * SBUS config
        */
       (void) bus_space_read_4(sa->sa_bustag, sc->sc_h2, GEM_SBUS_RESET);
       delay(100);
       bus_space_write_4(sa->sa_bustag, sc->sc_h2, GEM_SBUS_CONFIG,
           GEM_SBUS_CFG_BSIZE128|GEM_SBUS_CFG_PARITY|GEM_SBUS_CFG_BMODE64);
       sc->sc_chiprev = bus_space_read_4(sa->sa_bustag, sc->sc_h2,
           GEM_SBUS_REVISION);

       printf(": GEM Ethernet controller (%s), version %s (rev 0x%02x)\n",
           sa->sa_name, prom_getpropstring(sa->sa_node, "version"),
           sc->sc_chiprev);

       gem_attach(sc, enaddr);

       /* Establish interrupt handler */
       if (sa->sa_nintr != 0)
               gsc->gsc_ih = bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_NET,
                                       gem_intr, sc);
}