/*      $NetBSD: wdc_obio.c,v 1.32 2022/08/20 20:02:22 tsutsui Exp $ */

/*
 * Copyright (c) 2002 Takeshi Shibagaki  All rights reserved.
 *
 * mac68k OBIO-IDE attachment created by Takeshi Shibagaki
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Charles M. Hannum.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wdc_obio.c,v 1.32 2022/08/20 20:02:22 tsutsui Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/kmem.h>
#include <sys/callout.h>

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

#include <mac68k/obio/obiovar.h>

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

#define WDC_OBIO_REG_NPORTS     0x40
#define WDC_OBIO_AUXREG_OFFSET  0x38
#define WDC_OBIO_AUXREG_NPORTS  1
#define WDC_OBIO_ISR_OFFSET     0x101
#define WDC_OBIO_ISR_NPORTS     1

static u_long   IDEBase = 0x50f1a000;

/*
 * XXX This code currently doesn't even try to allow 32-bit data port use.
 */

struct wdc_obio_softc {
        struct  wdc_softc sc_wdcdev;
        struct  ata_channel *sc_chanlist[1];
        struct  ata_channel sc_channel;
        struct  wdc_regs sc_wdc_regs;
        void    *sc_ih;
};

int     wdc_obio_match(device_t, cfdata_t, void *);
void    wdc_obio_attach(device_t, device_t, void *);
void    wdc_obio_intr(void *);

CFATTACH_DECL_NEW(wdc_obio, sizeof(struct wdc_obio_softc),
    wdc_obio_match, wdc_obio_attach, NULL, NULL);

static bus_space_tag_t          wdc_obio_isr_tag;
static bus_space_handle_t       wdc_obio_isr_hdl;
static struct ata_channel       *ch_sc;

int
wdc_obio_match(device_t parent, cfdata_t match, void *aux)
{
        struct obio_attach_args *oa = (struct obio_attach_args *) aux;
        struct wdc_regs *wdr;
        int i, result = 0;

        wdr = kmem_alloc(sizeof(*wdr), KM_SLEEP);

        switch (current_mac_model->machineid) {
        case MACH_MACPB150:
        case MACH_MACPB190:
        case MACH_MACPB190CS:
        case MACH_MACP580:
        case MACH_MACQ630:
                wdr->cmd_iot = wdr->ctl_iot = oa->oa_tag;

                if (bus_space_map(wdr->cmd_iot, IDEBase, WDC_OBIO_REG_NPORTS,
                    0, &wdr->cmd_baseioh))
                        goto out;

                mac68k_bus_space_handle_swapped(wdr->cmd_iot,
                    &wdr->cmd_baseioh);

                for (i = 0; i < WDC_NREG; i++) {
                        if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
                            i * 4, 4, &wdr->cmd_iohs[i]) != 0)
                                goto unmap;
                }
                wdc_init_shadow_regs(wdr);

                if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
                    WDC_OBIO_AUXREG_OFFSET, WDC_OBIO_AUXREG_NPORTS,
                    &wdr->ctl_ioh))
                        goto unmap;

                result = wdcprobe(wdr);

 unmap:
                bus_space_unmap(wdr->cmd_iot, wdr->cmd_baseioh,
                    WDC_OBIO_REG_NPORTS);
        }
 out:
        kmem_free(wdr, sizeof(*wdr));
        return result;
}

void
wdc_obio_attach(device_t parent, device_t self, void *aux)
{
        struct wdc_obio_softc *sc = device_private(self);
        struct wdc_regs *wdr;
        struct obio_attach_args *oa = aux;
        struct ata_channel *chp = &sc->sc_channel;
        int i;

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

        oa->oa_addr = IDEBase;
        wdr->cmd_iot = wdr->ctl_iot = oa->oa_tag;

        if (bus_space_map(wdr->cmd_iot, oa->oa_addr, WDC_OBIO_REG_NPORTS, 0,
            &wdr->cmd_baseioh)) {
                aprint_error(": couldn't map registers\n");
                return;
        }

        mac68k_bus_space_handle_swapped(wdr->cmd_iot, &wdr->cmd_baseioh);

        for (i = 0; i < WDC_NREG; i++) {
                if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
                    i * 4, 4, &wdr->cmd_iohs[i]) != 0) {
                        aprint_error(
                            ": unable to subregion control register\n");
                        goto err;
                }
        }

        if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
            WDC_OBIO_AUXREG_OFFSET, WDC_OBIO_AUXREG_NPORTS, &wdr->ctl_ioh)) {
                aprint_error(": unable to subregion aux register\n");
                goto err;
        }

        wdc_obio_isr_tag = oa->oa_tag;

        if (bus_space_map(wdc_obio_isr_tag, oa->oa_addr + WDC_OBIO_ISR_OFFSET,
            WDC_OBIO_ISR_NPORTS, 0, &wdc_obio_isr_hdl)) {
                aprint_error(": couldn't map intr status register\n");
                goto err;
        }

        switch (current_mac_model->machineid) {
        case MACH_MACP580:
        case MACH_MACQ630:
                /*
                 * Quadra/Performa IDE generates pseudo Nubus intr at slot F
                 */
                aprint_normal(" (Quadra/Performa series IDE interface)");

                add_nubus_intr(0xf, wdc_obio_intr, sc);

                break;
        case MACH_MACPB150:
        case MACH_MACPB190:
        case MACH_MACPB190CS:
                /*
                 * PowerBook IDE generates pseudo NuBus intr at slot C
                 */
                aprint_normal(" (PowerBook series IDE interface)");

                add_nubus_intr(0xc, wdc_obio_intr, sc);

                break;
        }

        ch_sc = chp;
        if ((device_cfdata(self)->cf_flags & ATAC_CAP_NOIRQ) != 0)
                sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_NOIRQ;
        sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16;
        sc->sc_wdcdev.sc_atac.atac_pio_cap = 0;
        sc->sc_chanlist[0] = chp;
        sc->sc_wdcdev.sc_atac.atac_channels = sc->sc_chanlist;
        sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
        sc->sc_wdcdev.wdc_maxdrives = 2;
        chp->ch_channel = 0;
        chp->ch_atac = &sc->sc_wdcdev.sc_atac;

        wdc_init_shadow_regs(wdr);

        aprint_normal("\n");

        wdcattach(chp);
        return;

 err:
        bus_space_unmap(wdr->cmd_iot, wdr->cmd_baseioh, WDC_OBIO_REG_NPORTS);
}

void
wdc_obio_intr(void *arg)
{
        uint8_t status;

        status = bus_space_read_1(wdc_obio_isr_tag, wdc_obio_isr_hdl, 0);
        if ((status & 0x20) != 0) {
                wdcintr(ch_sc);
                bus_space_write_1(wdc_obio_isr_tag, wdc_obio_isr_hdl, 0,
                    status & ~0x20);
        }
}