/*      $NetBSD: grf_nubus.c,v 1.79 2023/12/20 00:40:43 thorpej Exp $   */

/*
 * Copyright (c) 1995 Allen Briggs.  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.
 * 3. 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.
 */
/*
 * Device-specific routines for handling Nubus-based video cards.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: grf_nubus.c,v 1.79 2023/12/20 00:40:43 thorpej Exp $");

#include <sys/param.h>

#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <sys/mman.h>
#include <sys/proc.h>
#include <sys/systm.h>

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

#include <mac68k/nubus/nubus.h>
#include <mac68k/dev/grfvar.h>

static void     load_image_data(void *, struct image_data *);

static void     grfmv_intr_generic_write1(void *);
static void     grfmv_intr_generic_write4(void *);
static void     grfmv_intr_generic_or4(void *);

static void     grfmv_intr_cb264(void *);
static void     grfmv_intr_cb364(void *);
static void     grfmv_intr_cmax(void *);
static void     grfmv_intr_cti(void *);
static void     grfmv_intr_radius(void *);
static void     grfmv_intr_radius24(void *);
static void     grfmv_intr_supermacgfx(void *);
static void     grfmv_intr_lapis(void *);
static void     grfmv_intr_formac(void *);
static void     grfmv_intr_vimage(void *);
static void     grfmv_intr_gvimage(void *);
static void     grfmv_intr_radius_gsc(void *);
static void     grfmv_intr_radius_gx(void *);
static void     grfmv_intr_relax_200(void *);
static void     grfmv_intr_mvc(void *);
static void     grfmv_intr_viltro_340(void *);

static int      grfmv_mode(struct grf_softc *, int, void *);
static int      grfmv_match(device_t, cfdata_t, void *);
static void     grfmv_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(macvid, sizeof(struct grfbus_softc),
    grfmv_match, grfmv_attach, NULL, NULL);

static void
load_image_data(void *  data, struct image_data *image)
{
        char *d = (char*)data;

        memcpy(&image->size,       d     , 4);
        memcpy(&image->offset,     d +  4, 4);
        memcpy(&image->rowbytes,   d +  8, 2);
        memcpy(&image->top,        d + 10, 2);
        memcpy(&image->left,       d + 12, 2);
        memcpy(&image->bottom,     d + 14, 2);
        memcpy(&image->right,      d + 16, 2);
        memcpy(&image->version,    d + 18, 2);
        memcpy(&image->packType,   d + 20, 2);
        memcpy(&image->packSize,   d + 22, 4);
        memcpy(&image->hRes,       d + 26, 4);
        memcpy(&image->vRes,       d + 30, 4);
        memcpy(&image->pixelType,  d + 34, 2);
        memcpy(&image->pixelSize,  d + 36, 2);
        memcpy(&image->cmpCount,   d + 38, 2);
        memcpy(&image->cmpSize,    d + 40, 2);
        memcpy(&image->planeBytes, d + 42, 4);
}


static int
grfmv_match(device_t parent, cfdata_t cf, void *aux)
{
        struct nubus_attach_args *na = (struct nubus_attach_args *)aux;

        if (na->category != NUBUS_CATEGORY_DISPLAY)
                return 0;

        if (na->type != NUBUS_TYPE_VIDEO)
                return 0;

        if (na->drsw != NUBUS_DRSW_APPLE)
                return 0;

        /*
         * If we've gotten this far, then we're dealing with a real-live
         * Apple QuickDraw-compatible display card resource.  Now, how to
         * determine that this is an active resource???  Dunno.  But we'll
         * proceed like it is.
         */

        return 1;
}

static void
grfmv_attach(device_t parent, device_t self, void *aux)
{
        struct grfbus_softc *sc = device_private(self);
        struct nubus_attach_args *na = (struct nubus_attach_args *)aux;
        struct image_data image_store, image;
        struct grfmode *gm;
        char cardname[CARD_NAME_LEN];
        nubus_dirent dirent;
        nubus_dir dir, mode_dir;
        int mode;

        memcpy(&sc->sc_slot, na->fmt, sizeof(nubus_slot));

        sc->sc_dev = self;
        sc->sc_tag = na->na_tag;
        sc->card_id = na->drhw;
        sc->sc_basepa = (bus_addr_t)NUBUS_SLOT2PA(na->slot);
        sc->sc_fbofs = 0;

        if (bus_space_map(sc->sc_tag, sc->sc_basepa, NBMEMSIZE,
            0, &sc->sc_handle)) {
                printf(": grfmv_attach: failed to map slot %d\n", na->slot);
                return;
        }

        nubus_get_main_dir(&sc->sc_slot, &dir);

        if (nubus_find_rsrc(sc->sc_tag, sc->sc_handle,
            &sc->sc_slot, &dir, na->rsrcid, &dirent) <= 0) {
bad:
                bus_space_unmap(sc->sc_tag, sc->sc_handle, NBMEMSIZE);
                return;
        }

        nubus_get_dir_from_rsrc(&sc->sc_slot, &dirent, &sc->board_dir);

        if (nubus_find_rsrc(sc->sc_tag, sc->sc_handle,
            &sc->sc_slot, &sc->board_dir, NUBUS_RSRC_TYPE, &dirent) <= 0)
                if ((na->rsrcid != 128) ||
                    (nubus_find_rsrc(sc->sc_tag, sc->sc_handle,
                    &sc->sc_slot, &dir, 129, &dirent) <= 0))
                        goto bad;

        mode = NUBUS_RSRC_FIRSTMODE;
        if (nubus_find_rsrc(sc->sc_tag, sc->sc_handle,
            &sc->sc_slot, &sc->board_dir, mode, &dirent) <= 0) {
                printf(": probe failed to get board rsrc.\n");
                goto bad;
        }

        nubus_get_dir_from_rsrc(&sc->sc_slot, &dirent, &mode_dir);

        if (nubus_find_rsrc(sc->sc_tag, sc->sc_handle,
            &sc->sc_slot, &mode_dir, VID_PARAMS, &dirent) <= 0) {
                printf(": probe failed to get mode dir.\n");
                goto bad;
        }

        if (nubus_get_ind_data(sc->sc_tag, sc->sc_handle, &sc->sc_slot,
            &dirent, (void *)&image_store, sizeof(struct image_data)) <= 0) {
                printf(": probe failed to get indirect mode data.\n");
                goto bad;
        }

        /* Need to load display info (and driver?), etc... (?) */

        load_image_data((void *)&image_store, &image);

        gm = &sc->curr_mode;
        gm->mode_id = mode;
        gm->ptype = image.pixelType;
        gm->psize = image.pixelSize;
        gm->width = image.right - image.left;
        gm->height = image.bottom - image.top;
        gm->rowbytes = image.rowbytes;
        gm->hres = image.hRes;
        gm->vres = image.vRes;
        gm->fbsize = gm->height * gm->rowbytes;
        gm->fbbase = (void *)(sc->sc_handle.base);      /* XXX evil hack */
        gm->fboff = image.offset;

        strncpy(cardname, nubus_get_card_name(sc->sc_tag, sc->sc_handle,
            &sc->sc_slot), CARD_NAME_LEN);
        cardname[CARD_NAME_LEN-1] = '\0';
        printf(": %s\n", cardname);

        if (sc->card_id == NUBUS_DRHW_TFB) {
                /*
                 * This is the Toby card, but apparently some manufacturers
                 * (like Cornerstone) didn't bother to get/use their own
                 * value here, even though the cards are different, so we
                 * try to differentiate here.
                 */
                if (strncmp(cardname, "Samsung 768", 11) == 0)
                        sc->card_id = NUBUS_DRHW_SAM768;
                else if (strncmp(cardname, "Toby frame", 10) != 0)
                        printf("%s: This display card pretends to be a TFB!\n",
                            device_xname(self));
        }

        switch (sc->card_id) {
        case NUBUS_DRHW_TFB:
        case NUBUS_DRHW_M2HRVC:
        case NUBUS_DRHW_PVC:
                sc->cli_offset = 0xa0000;
                sc->cli_value = 0;
                add_nubus_intr(na->slot, grfmv_intr_generic_write1, sc);
                break;
        case NUBUS_DRHW_WVC:
                sc->cli_offset = 0xa00000;
                sc->cli_value = 0;
                add_nubus_intr(na->slot, grfmv_intr_generic_write1, sc);
                break;
        case NUBUS_DRHW_COLORMAX:
                add_nubus_intr(na->slot, grfmv_intr_cmax, sc);
                break;
        case NUBUS_DRHW_SE30:
                /* Do nothing--SE/30 interrupts are disabled */
                break;
        case NUBUS_DRHW_MDC:
                sc->cli_offset = 0x200148;
                sc->cli_value = 1;
                add_nubus_intr(na->slot, grfmv_intr_generic_write4, sc);

                /* Enable interrupts; to disable, write 0x7 to this location */
                bus_space_write_4(sc->sc_tag, sc->sc_handle, 0x20013C, 5);
                break;
        case NUBUS_DRHW_CB264:
                add_nubus_intr(na->slot, grfmv_intr_cb264, sc);
                break;
        case NUBUS_DRHW_CB364:
                add_nubus_intr(na->slot, grfmv_intr_cb364, sc);
                break;
        case NUBUS_DRHW_RPC8:
                sc->cli_offset = 0xfdff8f;
                sc->cli_value = 0xff;
                add_nubus_intr(na->slot, grfmv_intr_generic_write1, sc);
                break;
        case NUBUS_DRHW_RPC8XJ:
                sc->cli_value = 0x66;
                add_nubus_intr(na->slot, grfmv_intr_radius, sc);
                break;
        case NUBUS_DRHW_RPC24X:
        case NUBUS_DRHW_BOOGIE:
                sc->cli_value = 0x64;
                add_nubus_intr(na->slot, grfmv_intr_radius, sc);
                break;
        case NUBUS_DRHW_RPC24XP:
                add_nubus_intr(na->slot, grfmv_intr_radius24, sc);
                break;
        case NUBUS_DRHW_RADGSC:
                add_nubus_intr(na->slot, grfmv_intr_radius_gsc, sc);
                break;
        case NUBUS_DRHW_RDCGX:
                add_nubus_intr(na->slot, grfmv_intr_radius_gx, sc);
                break;
        case NUBUS_DRHW_FIILX:
        case NUBUS_DRHW_FIISXDSP:
        case NUBUS_DRHW_FUTURASX:
                sc->cli_offset = 0xf05000;
                sc->cli_value = 0x80;
                add_nubus_intr(na->slot, grfmv_intr_generic_write1, sc);
                break;
        case NUBUS_DRHW_SAM768:
                add_nubus_intr(na->slot, grfmv_intr_cti, sc);
                break;
        case NUBUS_DRHW_SUPRGFX:
                add_nubus_intr(na->slot, grfmv_intr_supermacgfx, sc);
                break;
        case NUBUS_DRHW_SPECTRM8:
                sc->cli_offset = 0x0de178;
                sc->cli_value = 0x80;
                add_nubus_intr(na->slot, grfmv_intr_generic_or4, sc);
                break;
        case NUBUS_DRHW_LAPIS:
                add_nubus_intr(na->slot, grfmv_intr_lapis, sc);
                break;
        case NUBUS_DRHW_RELAX200:
                add_nubus_intr(na->slot, grfmv_intr_relax_200, sc);
                break;
        case NUBUS_DRHW_BAER:
        case NUBUS_DRHW_FORMAC:
                add_nubus_intr(na->slot, grfmv_intr_formac, sc);
                break;
        case NUBUS_DRHW_ROPS24LXI:
        case NUBUS_DRHW_ROPS24XLTV:
        case NUBUS_DRHW_ROPS24MXTV:
                sc->cli_offset = 0xfb0010;
                sc->cli_value = 0x00;
                add_nubus_intr(na->slot, grfmv_intr_generic_write4, sc);
                break;
        case NUBUS_DRHW_ROPSPPGT:
                sc->cli_offset = 0xf50010;
                sc->cli_value = 0x02;
                add_nubus_intr(na->slot, grfmv_intr_generic_write4, sc);
                break;
        case NUBUS_DRHW_VIMAGE:
                add_nubus_intr(na->slot, grfmv_intr_vimage, sc);
                break;
        case NUBUS_DRHW_GVIMAGE:
                add_nubus_intr(na->slot, grfmv_intr_gvimage, sc);
                break;
        case NUBUS_DRHW_MC2124NB:
                sc->cli_offset = 0xfd1000;
                sc->cli_value = 0x00;
                add_nubus_intr(na->slot, grfmv_intr_generic_write4, sc);
                break;
        case NUBUS_DRHW_MICRON:
                sc->cli_offset = 0xa00014;
                sc->cli_value = 0;
                add_nubus_intr(na->slot, grfmv_intr_generic_write4, sc);
                break;
        case NUBUS_DRHW_MVC:
                add_nubus_intr(na->slot, grfmv_intr_mvc, sc);
                break;
        case NUBUS_DRHW_VILTRO340:
                add_nubus_intr(na->slot, grfmv_intr_viltro_340, sc);
                break;
        default:
                printf("%s: Unknown video card ID 0x%x --",
                    device_xname(self), sc->card_id);
                printf(" Not installing interrupt routine.\n");
                break;
        }

        /* Perform common video attachment. */
        grf_establish(sc, &sc->sc_slot, grfmv_mode);
}

static int
grfmv_mode(struct grf_softc *gp, int cmd, void *arg)
{
        switch (cmd) {
        case GM_GRFON:
        case GM_GRFOFF:
                return 0;
        case GM_CURRMODE:
                break;
        case GM_NEWMODE:
                break;
        case GM_LISTMODES:
                break;
        }
        return EINVAL;
}

/* Interrupt handlers... */
/*
 * Generic routine to clear interrupts for cards where it simply takes
 * a MOV.B to clear the interrupt.  The offset and value of this byte
 * varies between cards.
 */
/*ARGSUSED*/
static void
grfmv_intr_generic_write1(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        bus_space_write_1(sc->sc_tag, sc->sc_handle,
            sc->cli_offset, (u_int8_t)sc->cli_value);
}

/*
 * Generic routine to clear interrupts for cards where it simply takes
 * a MOV.L to clear the interrupt.  The offset and value of this byte
 * varies between cards.
 */
/*ARGSUSED*/
static void
grfmv_intr_generic_write4(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        bus_space_write_4(sc->sc_tag, sc->sc_handle,
            sc->cli_offset, sc->cli_value);
}

/*
 * Generic routine to clear interrupts for cards where it simply takes
 * an OR.L to clear the interrupt.  The offset and value of this byte
 * varies between cards.
 */
/*ARGSUSED*/
static void
grfmv_intr_generic_or4(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;
        unsigned long   scratch;

        scratch = bus_space_read_4(sc->sc_tag, sc->sc_handle, sc->cli_offset);
        scratch |= 0x80;
        bus_space_write_4(sc->sc_tag, sc->sc_handle, sc->cli_offset, scratch);
}

/*
 * Routine to clear interrupts for the Radius PrecisionColor 8xj card.
 */
/*ARGSUSED*/
static void
grfmv_intr_radius(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;
        u_int8_t c;

        c = sc->cli_value;

        c |= 0x80;
        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0xd00403, c);
        c &= 0x7f;
        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0xd00403, c);
}

/*
 * Routine to clear interrupts for the Radius PrecisionColor 24Xp card.
 * Is this what the 8xj routine is doing, too?
 */
/*ARGSUSED*/
static void
grfmv_intr_radius24(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;
        u_int8_t c;

        c = 0x80 | bus_space_read_1(sc->sc_tag, sc->sc_handle, 0xfffd8);
        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0xd00403, c);
        c &= 0x7f;
        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0xd00403, c);
}

/*
 * Routine to clear interrupts on Samsung 768x1006 video controller.
 * This controller was manufactured by Cornerstone Technology, Inc.,
 * now known as Cornerstone Imaging.
 *
 * To clear this interrupt, we apparently have to set, then clear,
 * bit 2 at byte offset 0x80000 from the card's base.
 *      Information for this provided by Brad Salai <bsalai@servtech.com>
 */
/*ARGSUSED*/
static void
grfmv_intr_cti(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;
        u_int8_t c;

        c = bus_space_read_1(sc->sc_tag, sc->sc_handle, 0x80000);
        c |= 0x02;
        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0x80000, c);
        c &= 0xfd;
        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0x80000, c);
}

/*ARGSUSED*/
static void
grfmv_intr_cb264(void *vsc)
{
        struct grfbus_softc *sc;
        volatile char *slotbase;

        sc = (struct grfbus_softc *)vsc;
        slotbase = (volatile char *)(sc->sc_handle.base); /* XXX evil hack */
        __asm volatile(
                "       movl    %0,%%a0                         \n"
                "       movl    %%a0@(0xff6028),%%d0            \n"
                "       andl    #0x2,%%d0                       \n"
                "       beq     _mv_intr0                       \n"
                "       movql   #0x3,%%d0                       \n"
                "_mv_intr0:                                     \n"
                "       movl    %%a0@(0xff600c),%%d1            \n"
                "       andl    #0x3,%%d1                       \n"
                "       cmpl    %%d1,%%d0                       \n"
                "       beq     _mv_intr_fin                    \n"
                "       movl    %%d0,%%a0@(0xff600c)            \n"
                "       nop                                     \n"
                "       tstb    %%d0                            \n"
                "       beq     _mv_intr1                       \n"
                "       movl    #0x0002,%%a0@(0xff6040)         \n"
                "       movl    #0x0102,%%a0@(0xff6044)         \n"
                "       movl    #0x0105,%%a0@(0xff6048)         \n"
                "       movl    #0x000e,%%a0@(0xff604c)         \n"
                "       movl    #0x001c,%%a0@(0xff6050)         \n"
                "       movl    #0x00bc,%%a0@(0xff6054)         \n"
                "       movl    #0x00c3,%%a0@(0xff6058)         \n"
                "       movl    #0x0061,%%a0@(0xff605c)         \n"
                "       movl    #0x0012,%%a0@(0xff6060)         \n"
                "       bra     _mv_intr_fin                    \n"
                "_mv_intr1:                                     \n"
                "       movl    #0x0002,%%a0@(0xff6040)         \n"
                "       movl    #0x0209,%%a0@(0xff6044)         \n"
                "       movl    #0x020c,%%a0@(0xff6048)         \n"
                "       movl    #0x000f,%%a0@(0xff604c)         \n"
                "       movl    #0x0027,%%a0@(0xff6050)         \n"
                "       movl    #0x00c7,%%a0@(0xff6054)         \n"
                "       movl    #0x00d7,%%a0@(0xff6058)         \n"
                "       movl    #0x006b,%%a0@(0xff605c)         \n"
                "       movl    #0x0029,%%a0@(0xff6060)         \n"
                "_mv_intr_fin:                                  \n"
                "       movl    #0x1,%%a0@(0xff6014)"
                : : "g" (slotbase) : "a0","d0","d1");
}

/*
 * Support for the Colorboard 364 might be more complex than it needs to
 * be.  If we can find more information about this card, this might be
 * significantly simplified.  Contributions welcome...  :-)
 */
/*ARGSUSED*/
static void
grfmv_intr_cb364(void *vsc)
{
        struct grfbus_softc *sc;
        volatile char *slotbase;

        sc = (struct grfbus_softc *)vsc;
        slotbase = (volatile char *)(sc->sc_handle.base); /* XXX evil hack */
        __asm volatile(
                "       movl    %0,%%a0                         \n"
                "       movl    %%a0@(0xfe6028),%%d0            \n"
                "       andl    #0x2,%%d0                       \n"
                "       beq     _cb364_intr4                    \n"
                "       movql   #0x3,%%d0                       \n"
                "       movl    %%a0@(0xfe6018),%%d1            \n"
                "       movl    #0x3,%%a0@(0xfe6018)            \n"
                "       movw    %%a0@(0xfe7010),%%d2            \n"
                "       movl    %%d1,%%a0@(0xfe6018)            \n"
                "       movl    %%a0@(0xfe6020),%%d1            \n"
                "       btst    #0x06,%%d2                      \n"
                "       beq     _cb364_intr0                    \n"
                "       btst    #0x00,%%d1                      \n"
                "       beq     _cb364_intr5                    \n"
                "       bsr     _cb364_intr1                    \n"
                "       bra     _cb364_intr_out                 \n"
                "_cb364_intr0:                                  \n"
                "       btst    #0x00,%%d1                      \n"
                "       bne     _cb364_intr5                    \n"
                "       bsr     _cb364_intr1                    \n"
                "       bra     _cb364_intr_out                 \n"
                "_cb364_intr1:                                  \n"
                "       movl    %%d0,%%a0@(0xfe600c)            \n"
                "       nop                                     \n"
                "       tstb    %%d0                            \n"
                "       beq     _cb364_intr3                    \n"
                "       movl    #0x0002,%%a0@(0xfe6040)         \n"
                "       movl    #0x0105,%%a0@(0xfe6048)         \n"
                "       movl    #0x000e,%%a0@(0xfe604c)         \n"
                "       movl    #0x00c3,%%a0@(0xfe6058)         \n"
                "       movl    #0x0061,%%a0@(0xfe605c)         \n"
                "       btst    #0x06,%%d2                      \n"
                "       beq     _cb364_intr2                    \n"
                "       movl    #0x001c,%%a0@(0xfe6050)         \n"
                "       movl    #0x00bc,%%a0@(0xfe6054)         \n"
                "       movl    #0x0012,%%a0@(0xfe6060)         \n"
                "       movl    #0x000e,%%a0@(0xfe6044)         \n"
                "       movl    #0x00c3,%%a0@(0xfe6064)         \n"
                "       movl    #0x0061,%%a0@(0xfe6020)         \n"
                "       rts                                     \n"
                "_cb364_intr2:                                  \n"
                "       movl    #0x0016,%%a0@(0xfe6050)         \n"
                "       movl    #0x00b6,%%a0@(0xfe6054)         \n"
                "       movl    #0x0011,%%a0@(0xfe6060)         \n"
                "       movl    #0x0101,%%a0@(0xfe6044)         \n"
                "       movl    #0x00bf,%%a0@(0xfe6064)         \n"
                "       movl    #0x0001,%%a0@(0xfe6020)         \n"
                "       rts                                     \n"
                "_cb364_intr3:                                  \n"
                "       movl    #0x0002,%%a0@(0xfe6040)         \n"
                "       movl    #0x0209,%%a0@(0xfe6044)         \n"
                "       movl    #0x020c,%%a0@(0xfe6048)         \n"
                "       movl    #0x000f,%%a0@(0xfe604c)         \n"
                "       movl    #0x0027,%%a0@(0xfe6050)         \n"
                "       movl    #0x00c7,%%a0@(0xfe6054)         \n"
                "       movl    #0x00d7,%%a0@(0xfe6058)         \n"
                "       movl    #0x006b,%%a0@(0xfe605c)         \n"
                "       movl    #0x0029,%%a0@(0xfe6060)         \n"
                "       oril    #0x0040,%%a0@(0xfe6064)         \n"
                "       movl    #0x0000,%%a0@(0xfe6020)         \n"
                "       rts                                     \n"
                "_cb364_intr4:                                  \n"
                "       movq    #0x00,%%d0                      \n"
                "_cb364_intr5:                                  \n"
                "       movl    %%a0@(0xfe600c),%%d1            \n"
                "       andl    #0x3,%%d1                       \n"
                "       cmpl    %%d1,%%d0                       \n"
                "       beq     _cb364_intr_out                 \n"
                "       bsr     _cb364_intr1                    \n"
                "_cb364_intr_out:                               \n"
                "       movl    #0x1,%%a0@(0xfe6014)            \n"
                "_cb364_intr_quit:"
                : : "g" (slotbase) : "a0","d0","d1","d2");
}

/*
 * Interrupt clearing routine for SuperMac GFX card.
 */
/*ARGSUSED*/
static void
grfmv_intr_supermacgfx(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        bus_space_read_1(sc->sc_tag, sc->sc_handle, 0xE70D3);
}

/*
 * Routine to clear interrupts for the Sigma Designs ColorMax card.
 */
/*ARGSUSED*/
static void
grfmv_intr_cmax(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        bus_space_read_4(sc->sc_tag, sc->sc_handle, 0xf501c);
        bus_space_read_4(sc->sc_tag, sc->sc_handle, 0xf5018);
}

/*
 * Routine to clear interrupts for the Lapis ProColorServer 8 PDS card
 * (for the SE/30).
 */
/*ARGSUSED*/
static void
grfmv_intr_lapis(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0xff7000, 0x08);
        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0xff7000, 0x0C);
}

/*
 * Routine to clear interrupts for the Formac ProNitron 80.IVb
 * and Color Card II
 */
/*ARGSUSED*/
static void
grfmv_intr_formac(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        bus_space_read_1(sc->sc_tag, sc->sc_handle, 0xde80db);
        bus_space_read_1(sc->sc_tag, sc->sc_handle, 0xde80d3);
}

/*
 * Routine to clear interrupts for the Vimage by Interware Co., Ltd.
 */
/*ARGSUSED*/
static void
grfmv_intr_vimage(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0x800000, 0x67);
        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0x800000, 0xE7);
}

/*
 * Routine to clear interrupts for the Grand Vimage by Interware Co., Ltd.
 */
/*ARGSUSED*/
static void
grfmv_intr_gvimage(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        bus_space_read_1(sc->sc_tag, sc->sc_handle, 0xf00000);
}

/*
 * Routine to clear interrupts for the Radius GS/C
 */
/*ARGSUSED*/
static void
grfmv_intr_radius_gsc(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        bus_space_read_1(sc->sc_tag, sc->sc_handle, 0xfb802);
        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0xfb802, 0xff);
}

/*
 * Routine to clear interrupts for the Radius GS/C
 */
/*ARGSUSED*/
static void
grfmv_intr_radius_gx(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0x600000, 0x00);
        bus_space_write_1(sc->sc_tag, sc->sc_handle, 0x600000, 0x20);
}

/*
 * Routine to clear interrupts for the Relax 19" model 200.
 */
/*ARGSUSED*/
static void
grfmv_intr_relax_200(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        /* The board ROM driver code has a tst.l here. */
        bus_space_read_4(sc->sc_tag, sc->sc_handle, 0x000D0040);
}

/*
 * Routine to clear interrupts for the Apple Mac II Monochrome Video Card.
 */
/*ARGSUSED*/
static void
grfmv_intr_mvc(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        bus_space_write_4(sc->sc_tag, sc->sc_handle, 0x00040000, 0);
        bus_space_write_4(sc->sc_tag, sc->sc_handle, 0x00020000, 0);    
}

/*
 * Routine to clear interrupts for the VillageTronic Mac Picasso 340.
 */
/*ARGSUSED*/
static void
grfmv_intr_viltro_340(void *vsc)
{
        struct grfbus_softc *sc = (struct grfbus_softc *)vsc;

        /* Yes, two read accesses to the same spot. */
        bus_space_read_1(sc->sc_tag, sc->sc_handle, 0x0500);
        bus_space_read_1(sc->sc_tag, sc->sc_handle, 0x0500);
}