/*      $NetBSD: gbox.c,v 1.4 2025/05/27 18:44:31 tsutsui Exp $ */
/*      $OpenBSD: gbox.c,v 1.15 2007/01/07 15:13:52 miod Exp $  */

/*
 * Copyright (c) 2005, Miodrag Vallat
 *
 * 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.
 */
/*-
 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe.
 *
 * 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) 1988 University of Utah.
 * Copyright (c) 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * 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. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 * from: Utah $Hdr: grf_gb.c 1.18 93/08/13$
 *
 *      @(#)grf_gb.c    8.4 (Berkeley) 1/12/94
 */

/*
 * Graphics routines for the Gatorbox.
 *
 * Note: In the context of this system, "gator" and "gatorbox" both refer to
 *       HP 987x0 graphics systems.  "Gator" is not used for high res mono.
 *       (as in 9837 Gator systems)
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/ioctl.h>
#include <sys/bus.h>
#include <sys/cpu.h>

#include <machine/autoconf.h>

#include <hp300/dev/dioreg.h>
#include <hp300/dev/diovar.h>
#include <hp300/dev/diodevs.h>
#include <hp300/dev/intiovar.h>

#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/rasops/rasops.h>

#include <hp300/dev/diofbreg.h>
#include <hp300/dev/diofbvar.h>
#include <hp300/dev/gboxreg.h>

struct  gbox_softc {
        device_t        sc_dev;
        struct diofb    *sc_fb;
        struct diofb    sc_fb_store;
        int             sc_scode;
};

static int      gbox_dio_match(device_t, cfdata_t, void *);
static void     gbox_dio_attach(device_t, device_t, void *);
static int      gbox_intio_match(device_t, cfdata_t, void *);
static void     gbox_intio_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(gbox_dio, sizeof(struct gbox_softc),
    gbox_dio_match, gbox_dio_attach, NULL, NULL);

CFATTACH_DECL_NEW(gbox_intio, sizeof(struct gbox_softc),
    gbox_intio_match, gbox_intio_attach, NULL, NULL);

static int      gbox_reset(struct diofb *, int, struct diofbreg *);
static void     gbox_restore(struct diofb *);
static int      gbox_setcmap(struct diofb *, struct wsdisplay_cmap *);
static void     gbox_setcolor(struct diofb *, u_int);
static int      gbox_windowmove(struct diofb *, uint16_t, uint16_t, uint16_t,
                    uint16_t, uint16_t, uint16_t, int16_t, int16_t);

static int      gbox_ioctl(void *, void *, u_long, void *, int, struct lwp *);

static struct wsdisplay_accessops gbox_accessops = {
        .ioctl        = gbox_ioctl,
        .mmap         = diofb_mmap,
        .alloc_screen = diofb_alloc_screen,
        .free_screen  = diofb_free_screen,
        .show_screen  = diofb_show_screen,
        .load_font    = NULL,
};

/*
 * Attachment glue
 */
int
gbox_intio_match(device_t parent, cfdata_t cf, void *aux)
{
        struct intio_attach_args *ia = aux;
        struct diofbreg *fbr;

        if (strcmp("fb", ia->ia_modname) != 0)
                return 0;

        fbr = (struct diofbreg *)ia->ia_addr;

        if (badaddr((void *)fbr))
                return 0;

        if (fbr->id == GRFHWID && fbr->fbid == GID_GATORBOX) {
                return 1;
        }

        return 0;
}

void
gbox_intio_attach(device_t parent, device_t self, void *aux)
{
        struct gbox_softc *sc = device_private(self);
        struct intio_attach_args *ia = aux;
        struct diofbreg *fbr;

        sc->sc_dev = self;
        fbr = (struct diofbreg *)ia->ia_addr;
        sc->sc_scode = CONSCODE_INTERNAL;

        if (sc->sc_scode == conscode) {
                sc->sc_fb = &diofb_cn;
        } else {
                sc->sc_fb = &sc->sc_fb_store;
                gbox_reset(sc->sc_fb, sc->sc_scode, fbr);
        }

        diofb_end_attach(self, &gbox_accessops, sc->sc_fb,
            sc->sc_scode == conscode, NULL);
}

int
gbox_dio_match(device_t parent, cfdata_t cf, void *aux)
{
        struct dio_attach_args *da = aux;

        /* We can not appear in DIO-II space */
        if (DIO_ISDIOII(da->da_scode))
                return 0;

        if (da->da_id == DIO_DEVICE_ID_FRAMEBUFFER &&
            da->da_secid == DIO_DEVICE_SECID_GATORBOX)
                return 1;

        return 0;
}

void
gbox_dio_attach(device_t parent, device_t self, void *aux)
{
        struct gbox_softc *sc = device_private(self);
        struct dio_attach_args *da = aux;
        bus_space_handle_t bsh;
        struct diofbreg * fbr;

        sc->sc_dev = self;
        sc->sc_scode = da->da_scode;
        if (sc->sc_scode == conscode) {
                fbr = (struct diofbreg *)conaddr;       /* already mapped */
                sc->sc_fb = &diofb_cn;
        } else {
                sc->sc_fb = &sc->sc_fb_store;
                if (bus_space_map(da->da_bst, da->da_addr, da->da_size, 0,
                    &bsh)) {
                        aprint_error(": can't map framebuffer\n");
                        return;
                }
                fbr = bus_space_vaddr(da->da_bst, bsh);
                if (gbox_reset(sc->sc_fb, sc->sc_scode, fbr) != 0) {
                        aprint_error(": can't reset framebuffer\n");
                        return;
                }
        }

        diofb_end_attach(self, &gbox_accessops, sc->sc_fb,
            sc->sc_scode == conscode, NULL);
}

/*
 * Initialize hardware and display routines.
 */

const uint8_t crtc_init_data[] = {
    0x29, 0x20, 0x23, 0x04, 0x30, 0x0b, 0x30,
    0x30, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00
};

int
gbox_reset(struct diofb *fb, int scode, struct diofbreg *fbr)
{
        int rc;
        u_int i;

        /* XXX don't trust hardware, force defaults */
        fb->fbwidth = 1024;
        fb->fbheight = 1024;
        fb->dwidth = 1024;
        fb->dheight = 768;
        if ((rc = diofb_fbinquire(fb, scode, fbr)) != 0)
                return rc;

        fb->bmv = gbox_windowmove;
        gbox_restore(fb);

        /*
         * Find out how many colors are available by determining
         * which planes are installed.  That is, write all ones to
         * a frame buffer location, see how many ones are read back.
         */
        if (1 /* fb->planes == 0 */) {
                volatile uint8_t *fbp;
                uint8_t save;

                fbp = (uint8_t *)fb->fbkva;
                save = *fbp;
                *fbp = 0xff;
                fb->planemask = *fbp;
                *fbp = save;

                for (fb->planes = 1; fb->planemask >= (1 << fb->planes);
                    fb->planes++);
                if (fb->planes > 8)
                        fb->planes = 8;
                fb->planemask = (1 << fb->planes) - 1;
        }

        diofb_fbsetup(fb);
        for (i = 0; i <= fb->planemask; i++)
                gbox_setcolor(fb, i);

        return 0;
}

void
gbox_restore(struct diofb *fb)
{
        volatile struct gboxfb *gb = (struct gboxfb *)fb->regkva;
        u_int i;

        /*
         * The minimal info here is from the Gatorbox X driver.
         */
        gb->write_protect = 0x0;
        gb->regs.interrupt = 0x4;
        gb->rep_rule = RR_COPY;
        gb->blink1 = 0xff;
        gb->blink2 = 0xff;

        /*
         * Program the 6845.
         */
        for (i = 0; i < sizeof(crtc_init_data); i++) {
                gb->crtc_address = i;
                gb->crtc_data = crtc_init_data[i];
        }

        tile_mover_waitbusy(gb);

        /* Enable display */
        gb->regs.sec_interrupt = 0x01;
}

int
gbox_ioctl(void *v, void *vs, u_long cmd, void *data, int flags, struct lwp *l)
{
        struct diofb *fb = v;
        struct wsdisplay_fbinfo *wdf;
        u_int i;

        switch (cmd) {
        case WSDISPLAYIO_GTYPE:
                *(u_int *)data = WSDISPLAY_TYPE_GBOX;
                return 0;
        case WSDISPLAYIO_SMODE:
                fb->mapmode = *(u_int *)data;
                if (fb->mapmode == WSDISPLAYIO_MODE_EMUL) {
                        gbox_restore(fb);
                        for (i = 0; i <= fb->planemask; i++)
                                gbox_setcolor(fb, i);
                }
                return 0;
        case WSDISPLAYIO_GINFO:
                wdf = (void *)data;
                wdf->width = fb->ri.ri_width;
                wdf->height = fb->ri.ri_height;
                wdf->depth = fb->ri.ri_depth;
                wdf->cmsize = 1 << fb->planes;
                return 0;
        case WSDISPLAYIO_LINEBYTES:
                *(u_int *)data = fb->ri.ri_stride;
                return 0;
        case WSDISPLAYIO_GETCMAP:
                return diofb_getcmap(fb, (struct wsdisplay_cmap *)data);
        case WSDISPLAYIO_PUTCMAP:
                return gbox_setcmap(fb, (struct wsdisplay_cmap *)data);
        case WSDISPLAYIO_GVIDEO:
        case WSDISPLAYIO_SVIDEO:
                return EPASSTHROUGH;
        }

        return EPASSTHROUGH;
}

void
gbox_setcolor(struct diofb *fb, u_int index)
{
        volatile struct gboxfb *gb = (struct gboxfb *)fb->regkva;

        gb->creg_select = index;
        gb->cmap_red = fb->cmap.r[index];
        gb->cmap_grn = fb->cmap.g[index];
        gb->cmap_blu = fb->cmap.b[index];
        gb->cmap_write = !!index;
        gbcm_waitbusy(gb);
}

int
gbox_setcmap(struct diofb *fb, struct wsdisplay_cmap *cm)
{
        uint8_t r[256], g[256], b[256];
        u_int index = cm->index, count = cm->count;
        u_int colcount = 1 << fb->planes;
        int error;

        if (index >= colcount || count > colcount - index)
                return EINVAL;

        if ((error = copyin(cm->red, r, count)) != 0)
                return error;
        if ((error = copyin(cm->green, g, count)) != 0)
                return error;
        if ((error = copyin(cm->blue, b, count)) != 0)
                return error;

        memcpy(fb->cmap.r + index, r, count);
        memcpy(fb->cmap.g + index, g, count);
        memcpy(fb->cmap.b + index, b, count);

        while (count-- != 0)
                gbox_setcolor(fb, index++);

        return 0;
}

int
gbox_windowmove(struct diofb *fb, uint16_t sx, uint16_t sy,
    uint16_t dx, uint16_t dy, uint16_t cx, uint16_t cy, int16_t rop,
    int16_t planemask)
{
        volatile struct gboxfb *gb = (struct gboxfb *)fb->regkva;
        int src, dest;

        if (planemask != 0xff)
                return EINVAL;

        src  = (sy * 1024) + sx; /* upper left corner in pixels */
        dest = (dy * 1024) + dx;

        tile_mover_waitbusy(gb);

        gb->width = -(cx / 4);
        gb->height = -(cy / 4);
        if (src < dest)
                gb->rep_rule = MOVE_DOWN_RIGHT | rop;
        else {
                gb->rep_rule = MOVE_UP_LEFT | rop;
                /*
                 * Adjust to top of lower right tile of the block.
                 */
                src = src + ((cy - 4) * 1024) + (cx - 4);
                dest= dest + ((cy - 4) * 1024) + (cx - 4);
        }
        *(volatile uint8_t *)(fb->fbkva + dest) =
            *(volatile uint8_t *)(fb->fbkva + src);

        tile_mover_waitbusy(gb);

        return 0;
}

/*
 * Gatorbox console support
 */
int
gboxcnattach(bus_space_tag_t bst, bus_addr_t addr, int scode)
{
        bus_space_handle_t bsh;
        void *va;
        struct diofbreg *fbr;
        struct diofb *fb = &diofb_cn;
        int size;

        if (bus_space_map(bst, addr, PAGE_SIZE, 0, &bsh))
                return 1;
        va = bus_space_vaddr(bst, bsh);
        fbr = va;

        if (badaddr(va) ||
            (fbr->id != GRFHWID) || (fbr->fbid != GID_GATORBOX)) {
                bus_space_unmap(bst, bsh, PAGE_SIZE);
                return 1;
        }

        size = DIO_SIZE(scode, va);

        bus_space_unmap(bst, bsh, PAGE_SIZE);
        if (bus_space_map(bst, addr, size, 0, &bsh))
                return 1;
        va = bus_space_vaddr(bst, bsh);

        /*
         * Initialize the framebuffer hardware.
         */
        conscode = scode;
        conaddr = va;
        gbox_reset(fb, conscode, (struct diofbreg *)conaddr);

        /*
         * Initialize the terminal emulator.
         */
        diofb_cnattach(fb);
        return 0;
}