/*      $OpenBSD: stp_sbus.c,v 1.13 2022/10/16 01:22:39 jsg Exp $       */
/*      $NetBSD: stp4020.c,v 1.23 2002/06/01 23:51:03 lukem 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.
 */

/*
 * STP4020: SBus/PCMCIA bridge supporting one Type-3 PCMCIA card, or up to
 * two Type-1 and Type-2 PCMCIA cards..
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/extent.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/device.h>

#include <dev/pcmcia/pcmciareg.h>
#include <dev/pcmcia/pcmciavar.h>
#include <dev/pcmcia/pcmciachip.h>

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

#include <dev/sbus/sbusvar.h>
#include <dev/sbus/stp4020reg.h>
#include <dev/sbus/stp4020var.h>

struct stp4020_sbus_softc {
        struct stp4020_softc stp;
        struct sparc_bus_space_tag *sc_bustag_le;
};

int     stpmatch(struct device *, void *, void *);
void    stpattach(struct device *, struct device *, void *);

const struct cfattach stp_sbus_ca = {
        sizeof(struct stp4020_sbus_softc), stpmatch, stpattach
};

int
stpmatch(struct device *parent, void *match, void *aux)
{
        struct sbus_attach_args *sa = aux;

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

/*
 * Attach all the sub-devices we can find
 */
void
stpattach(struct device *parent, struct device *self, void *aux)
{
        struct sbus_attach_args *sa = aux;
        struct stp4020_sbus_softc *ssc = (void *)self;
        struct stp4020_softc *sc = (void *)self;
        int node;
        int i;
        bus_space_tag_t bt;
        bus_space_handle_t bh;

        node = sa->sa_node;

        /* Allocate little-endian bus tag */
        ssc->sc_bustag_le = malloc(sizeof(*sa->sa_bustag), M_DEVBUF, M_NOWAIT);
        if (ssc->sc_bustag_le == NULL)
                panic("could not allocate stp bus tag");
        *ssc->sc_bustag_le = *sa->sa_bustag;
        ssc->sc_bustag_le->asi = ASI_PRIMARY_LITTLE;

        /* Transfer bus tags */
        sc->sc_bustag = sa->sa_bustag;

        /* Set up per-socket static initialization */
        sc->sc_socks[0].sc = sc->sc_socks[1].sc = sc;
        sc->sc_socks[0].tag = sc->sc_socks[1].tag = sa->sa_bustag;

        if (sa->sa_nreg < 8) {
                printf(": only %d register sets\n", sa->sa_nreg);
                return;
        }

        if (sa->sa_nintr != 2) {
                printf(": expect 2 interrupt SBus levels; got %d\n",
                    sa->sa_nintr);
                return;
        }

#define STP4020_BANK_PROM       0
#define STP4020_BANK_CTRL       4
        for (i = 0; i < 8; i++) {

                /*
                 * STP4020 Register address map:
                 *      bank  0:   Forth PROM
                 *      banks 1-3: socket 0, windows 0-2
                 *      bank  4:   control registers
                 *      banks 5-7: socket 1, windows 0-2
                 */

                if (i == STP4020_BANK_PROM)
                        /* Skip the PROM */
                        continue;

                if (i == STP4020_BANK_CTRL)
                        bt = sc->sc_bustag;
                else
                        bt = ssc->sc_bustag_le;

                if (sbus_bus_map(bt, sa->sa_reg[i].sbr_slot,
                    sa->sa_reg[i].sbr_offset, sa->sa_reg[i].sbr_size, 0, 0,
                    &bh) != 0) {
                        printf(": attach: cannot map registers\n");
                        return;
                }

                if (i == STP4020_BANK_CTRL) {
                        /*
                         * Copy tag and handle to both socket structures
                         * for easy access in control/status IO functions.
                         */
                        sc->sc_socks[0].regs = sc->sc_socks[1].regs = bh;
                } else if (i < STP4020_BANK_CTRL) {
                        /* banks 1-3 */
                        sc->sc_socks[0].windows[i-1].winaddr = bh;
                        sc->sc_socks[0].wintag = bt;
                } else {
                        /* banks 5-7 */
                        sc->sc_socks[1].windows[i-5].winaddr = bh;
                        sc->sc_socks[1].wintag = bt;
                }
        }

        /*
         * We get to use two SBus interrupt levels.
         * The higher level we use for status change interrupts;
         * the lower level for PC card I/O.
         */
        bus_intr_establish(sa->sa_bustag, sa->sa_intr[1].sbi_pri,
            IPL_NONE, 0, stp4020_statintr, sc, self->dv_xname);

        bus_intr_establish(sa->sa_bustag, sa->sa_intr[0].sbi_pri,
            IPL_NONE, 0, stp4020_iointr, sc, self->dv_xname);

        stpattach_common(sc, sa->sa_frequency);
}