/*      $NetBSD: wdc_amiga.c,v 1.41 2023/12/20 00:40:42 thorpej Exp $ */

/*-
 * Copyright (c) 2000, 2003 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Michael L. Hitch.
 *
 * 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wdc_amiga.c,v 1.41 2023/12/20 00:40:42 thorpej Exp $");

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

#include <machine/cpu.h>
#include <machine/intr.h>
#include <sys/bswap.h>

#include <amiga/amiga/cia.h>
#include <amiga/amiga/custom.h>
#include <amiga/amiga/device.h>
#include <amiga/amiga/gayle.h>
#include <amiga/dev/zbusvar.h>

#include <dev/ata/atavar.h>
#include <dev/ic/wdcvar.h>

struct wdc_amiga_softc {
        struct wdc_softc sc_wdcdev;
        struct  ata_channel *sc_chanlist[1];
        struct  ata_channel sc_channel;
        struct wdc_regs sc_wdc_regs;
        struct isr sc_isr;
        struct bus_space_tag cmd_iot;
        struct bus_space_tag ctl_iot;
        bool gayle_intr;
};

int     wdc_amiga_probe(device_t, cfdata_t, void *);
void    wdc_amiga_attach(device_t, device_t, void *);
int     wdc_amiga_intr(void *);

CFATTACH_DECL_NEW(wdc_amiga, sizeof(struct wdc_amiga_softc),
    wdc_amiga_probe, wdc_amiga_attach, NULL, NULL);

int
wdc_amiga_probe(device_t parent, cfdata_t cfp, void *aux)
{
        if ((!is_a4000() && !is_a1200() && !is_a600()) ||
            !matchname(aux, "wdc"))
                return(0);
        return 1;
}

void
wdc_amiga_attach(device_t parent, device_t self, void *aux)
{
        struct wdc_amiga_softc *sc = device_private(self);
        struct wdc_regs *wdr;
        int i;

        aprint_normal("\n");

        sc->sc_wdcdev.sc_atac.atac_dev = self;
        sc->sc_wdcdev.regs = wdr = &sc->sc_wdc_regs;

        gayle_init();

        if (is_a4000()) {
                sc->cmd_iot.base = (bus_addr_t) ztwomap(GAYLE_IDE_BASE_A4000 + 2);
                sc->gayle_intr = false;
        } else {
                sc->cmd_iot.base = (bus_addr_t) ztwomap(GAYLE_IDE_BASE + 2);
                sc->gayle_intr = true;
        }

        sc->cmd_iot.absm = sc->ctl_iot.absm = &amiga_bus_stride_4swap;
        wdr->cmd_iot = &sc->cmd_iot;
        wdr->ctl_iot = &sc->ctl_iot;

        if (bus_space_map(wdr->cmd_iot, 0, 0x40, 0,
                          &wdr->cmd_baseioh)) {
                aprint_error_dev(self, "couldn't map registers\n");
                return;
        }

        for (i = 0; i < WDC_NREG; i++) {
                if (bus_space_subregion(wdr->cmd_iot,
                    wdr->cmd_baseioh, i, i == 0 ? 4 : 1,
                    &wdr->cmd_iohs[i]) != 0) {

                        bus_space_unmap(wdr->cmd_iot,
                            wdr->cmd_baseioh, 0x40);
                        aprint_error_dev(self, "couldn't map registers\n");
                        return;
                }
        }

        if (bus_space_subregion(wdr->cmd_iot,
            wdr->cmd_baseioh, 0x406, 1, &wdr->ctl_ioh))
                return;

        sc->sc_wdcdev.sc_atac.atac_cap = ATAC_CAP_DATA16;
        sc->sc_wdcdev.sc_atac.atac_pio_cap = 0;
        sc->sc_chanlist[0] = &sc->sc_channel;
        sc->sc_wdcdev.sc_atac.atac_channels = sc->sc_chanlist;
        sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
        sc->sc_wdcdev.wdc_maxdrives = 2;
        sc->sc_channel.ch_channel = 0;
        sc->sc_channel.ch_atac = &sc->sc_wdcdev.sc_atac;

        wdc_init_shadow_regs(wdr);

        sc->sc_isr.isr_intr = wdc_amiga_intr;
        sc->sc_isr.isr_arg = sc;
        sc->sc_isr.isr_ipl = 2;
        add_isr (&sc->sc_isr);

        if (sc->gayle_intr)
                gayle_intr_enable_set(GAYLE_INT_IDE);

        wdcattach(&sc->sc_channel);
}

int
wdc_amiga_intr(void *arg)
{
        struct wdc_amiga_softc *sc;
        uint8_t intreq;
        int ret;

        sc = (struct wdc_amiga_softc *)arg;
        ret = 0;
        intreq = gayle_intr_status();

        if (intreq & GAYLE_INT_IDE) {
                if (sc->gayle_intr)
                        gayle_intr_ack(0x7C | (intreq & GAYLE_INT_IDEACK));
                ret = wdcintr(&sc->sc_channel);
        }

        return ret;
}