/*      $NetBSD: if_hme_sbus.c,v 1.34 2022/09/25 18:03:04 thorpej Exp $ */

/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* 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 device driver for the HME ethernet device.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_hme_sbus.c,v 1.34 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/hmevar.h>

struct hmesbus_softc {
       struct  hme_softc       hsc_hme;        /* HME device */
       /* sbus specific stuff here */
};

int     hmematch_sbus(device_t, cfdata_t, void *);
void    hmeattach_sbus(device_t, device_t, void *);

CFATTACH_DECL_NEW(hme_sbus, sizeof(struct hmesbus_softc),
   hmematch_sbus, hmeattach_sbus, NULL, NULL);

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

       return (strcmp(cf->cf_name, sa->sa_name) == 0 ||
           strcmp("SUNW,qfe", sa->sa_name) == 0 ||
           strcmp("SUNW,hme", sa->sa_name) == 0);
}

void
hmeattach_sbus(device_t parent, device_t self, void *aux)
{
       struct sbus_attach_args *sa = aux;
       struct hmesbus_softc *hsc = device_private(self);
       struct hme_softc *sc = &hsc->hsc_hme;
       struct sbus_softc *sbsc = device_private(parent);
       uint32_t burst, sbusburst;
       int node;

       sc->sc_dev = self;
       node = sa->sa_node;

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

       aprint_normal(": Sun Happy Meal Ethernet (%s)\n",
           sa->sa_name);

       if (sa->sa_nreg < 5) {
               aprint_error_dev(self, "only %d register sets\n",
                   sa->sa_nreg);
               return;
       }

       /*
        * Map five register banks:
        *
        *      bank 0: HME SEB registers
        *      bank 1: HME ETX registers
        *      bank 2: HME ERX registers
        *      bank 3: HME MAC registers
        *      bank 4: HME MIF registers
        *
        */
       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_seb) != 0) {
               aprint_error_dev(self, "cannot map SEB 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_etx) != 0) {
               aprint_error_dev(self, "cannot map ETX registers\n");
               return;
       }
       if (sbus_bus_map(sa->sa_bustag,
                        sa->sa_reg[2].oa_space,
                        sa->sa_reg[2].oa_base,
                        (bus_size_t)sa->sa_reg[2].oa_size,
                        0, &sc->sc_erx) != 0) {
               aprint_error_dev(self, "cannot map ERX registers\n");
               return;
       }
       if (sbus_bus_map(sa->sa_bustag,
                        sa->sa_reg[3].oa_space,
                        sa->sa_reg[3].oa_base,
                        (bus_size_t)sa->sa_reg[3].oa_size,
                        0, &sc->sc_mac) != 0) {
               aprint_error_dev(self, "cannot map MAC registers\n");
               return;
       }
       if (sbus_bus_map(sa->sa_bustag,
                        sa->sa_reg[4].oa_space,
                        sa->sa_reg[4].oa_base,
                        (bus_size_t)sa->sa_reg[4].oa_size,
                        0, &sc->sc_mif) != 0) {
               aprint_error_dev(self, "cannot map MIF registers\n");
               return;
       }

       prom_getether(node, sc->sc_enaddr);

       /*
        * Get transfer burst size from PROM and pass it on
        * to the back-end driver.
        */
       sbusburst = sbsc->sc_burst;
       if (sbusburst == 0)
               sbusburst = SBUS_BURST_32 - 1; /* 1->16 */

       burst = prom_getpropint(node, "burst-sizes", -1);
       if (burst == -1)
               /* take SBus burst sizes */
               burst = sbusburst;

       /* Clamp at parent's burst sizes */
       burst &= sbusburst;

       /* Translate into plain numerical format */
       sc->sc_burst =  (burst & SBUS_BURST_32) ? 32 :
                       (burst & SBUS_BURST_16) ? 16 : 0;

       sc->sc_pci = 0; /* XXXXX should all be done in bus_dma. */
       hme_config(sc);

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

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