/*      $OpenBSD: dma_sbus.c,v 1.19 2022/10/16 01:22:40 jsg Exp $       */
/*      $NetBSD: dma_sbus.c,v 1.5 2000/07/09 20:57:42 pk Exp $ */

/*-
 * Copyright (c) 1998 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.
 */

/*
 * Copyright (c) 1994 Peter Galbavy.  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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/malloc.h>

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

#include <dev/sbus/sbusvar.h>

#include <dev/ic/lsi64854reg.h>
#include <dev/ic/lsi64854var.h>

#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>

#include <dev/ic/ncr53c9xreg.h>
#include <dev/ic/ncr53c9xvar.h>

struct dma_softc {
        struct lsi64854_softc   sc_lsi64854;    /* base device */
};

int     dmamatch_sbus(struct device *, void *, void *);
void    dmaattach_sbus(struct device *, struct device *, void *);

int     dmaprint_sbus(void *, const char *);

void    *dmabus_intr_establish(
                bus_space_tag_t,
                bus_space_tag_t,
                int,                    /*bus interrupt priority*/
                int,                    /*`device class' level*/
                int,                    /*flags*/
                int (*)(void *),        /*handler*/
                void *,                 /*handler arg*/
                const char *);          /*what*/

static  bus_space_tag_t dma_alloc_bustag(struct dma_softc *sc);

const struct cfattach dma_sbus_ca = {
        sizeof(struct dma_softc), dmamatch_sbus, dmaattach_sbus
};

const struct cfattach ledma_ca = {
        sizeof(struct dma_softc), dmamatch_sbus, dmaattach_sbus
};

struct cfdriver ledma_cd = {
        NULL, "ledma", DV_DULL
};

struct cfdriver dma_cd = {
        NULL, "dma", DV_DULL
};

int
dmaprint_sbus(void *aux, const char *busname)
{
        struct sbus_attach_args *sa = aux;
        bus_space_tag_t t = sa->sa_bustag;
        struct dma_softc *sc = t->cookie;

        sa->sa_bustag = sc->sc_lsi64854.sc_bustag;      /* XXX */
        sbus_print(aux, busname);       /* XXX */
        sa->sa_bustag = t;              /* XXX */
        return (UNCONF);
}

int
dmamatch_sbus(struct device *parent, void *vcf, void *aux)
{
        struct cfdata *cf = vcf;
        struct sbus_attach_args *sa = aux;

        return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0 ||
                strcmp("espdma", sa->sa_name) == 0);
}

void
dmaattach_sbus(struct device *parent, struct device *self, void *aux)
{
        struct sbus_attach_args *sa = aux;
        struct dma_softc *dsc = (void *)self;
        struct lsi64854_softc *sc = &dsc->sc_lsi64854;
        bus_space_handle_t bh;
        bus_space_tag_t sbt;
        int sbusburst, burst;
        int node;

        node = sa->sa_node;

        sc->sc_bustag = sa->sa_bustag;
        sc->sc_dmatag = sa->sa_dmatag;

        /* Map registers */
        if (sa->sa_npromvaddrs != 0) {
                if (sbus_bus_map(sa->sa_bustag, 0, 
                    sa->sa_promvaddrs[0],
                    sa->sa_size,                /* ???? */
                    BUS_SPACE_MAP_PROMADDRESS,
                    0, &bh) != 0) {
                        printf("%s: cannot map registers\n", self->dv_xname);
                        return;
                }
        } else if (sbus_bus_map(sa->sa_bustag, sa->sa_slot,
            sa->sa_offset,
            sa->sa_size,
            0, 0, &bh) != 0) {
                printf("%s: cannot map registers\n", self->dv_xname);
                return;
        }
        sc->sc_regs = bh;

        /*
         * Get transfer burst size from PROM and plug it into the
         * controller registers. This is needed on the Sun4m; do
         * others need it too?
         */
        sbusburst = ((struct sbus_softc *)parent)->sc_burst;
        if (sbusburst == 0)
                sbusburst = SBUS_BURST_32 - 1; /* 1->16 */

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

        /* Clamp at parent's burst sizes */
        burst &= sbusburst;
        sc->sc_burst = (burst & SBUS_BURST_32) ? 32 :
                       (burst & SBUS_BURST_16) ? 16 : 0;

        if (sc->sc_dev.dv_cfdata->cf_attach == &ledma_ca) {
                char *cabletype;
                u_int32_t csr;
                /*
                 * Check to see which cable type is currently active and
                 * set the appropriate bit in the ledma csr so that it
                 * gets used. If we didn't netboot, the PROM won't have
                 * the "cable-selection" property; default to TP and then
                 * the user can change it via a "media" option to ifconfig.
                 */
                cabletype = getpropstring(node, "cable-selection");
                csr = L64854_GCSR(sc);
                if (strcmp(cabletype, "tpe") == 0) {
                        csr |= E_TP_AUI;
                } else if (strcmp(cabletype, "aui") == 0) {
                        csr &= ~E_TP_AUI;
                } else {
                        /* assume TP if nothing there */
                        csr |= E_TP_AUI;
                }
                L64854_SCSR(sc, csr);
                delay(20000);   /* manual says we need a 20ms delay */
                sc->sc_channel = L64854_CHANNEL_ENET;
        } else {
                sc->sc_channel = L64854_CHANNEL_SCSI;
        }

        sbt = dma_alloc_bustag(dsc);
        if (lsi64854_attach(sc) != 0)
                return;

        /* Attach children */
        for (node = firstchild(sa->sa_node); node; node = nextsibling(node)) {
                struct sbus_attach_args sa;
                sbus_setup_attach_args((struct sbus_softc *)parent,
                                       sbt, sc->sc_dmatag, node, &sa);
                (void) config_found(&sc->sc_dev, (void *)&sa, dmaprint_sbus);
                sbus_destroy_attach_args(&sa);
        }
}

void *
dmabus_intr_establish(
        bus_space_tag_t t,
        bus_space_tag_t t0,
        int pri,
        int level,
        int flags,
        int (*handler)(void *),
        void *arg,
        const char *what)
{
        struct lsi64854_softc *sc = t->cookie;

        /* XXX - for now only le; do esp later */
        if (sc->sc_channel == L64854_CHANNEL_ENET) {
                sc->sc_intrchain = handler;
                sc->sc_intrchainarg = arg;
                handler = lsi64854_enet_intr;
                arg = sc;
        }

        for (t = t->parent; t; t = t->parent) {
                if (t->sparc_intr_establish != NULL)
                        return ((*t->sparc_intr_establish)
                                (t, t0, pri, level, flags, handler, arg, what));

        }

        panic("dmabus_intr_establish: no handler found");

        return (NULL);
}

bus_space_tag_t
dma_alloc_bustag(struct dma_softc *sc)
{
        struct sparc_bus_space_tag *sbt;

        sbt = malloc(sizeof(*sbt), M_DEVBUF, M_NOWAIT | M_ZERO);
        if (sbt == NULL)
                return (NULL);

        sbt->cookie = sc;
        sbt->parent = sc->sc_lsi64854.sc_bustag;
        sbt->asi = sbt->parent->asi;
        sbt->sasi = sbt->parent->sasi;
        sbt->sparc_intr_establish = dmabus_intr_establish;
        return (sbt);
}