/*      $NetBSD: gendiofb.c,v 1.2 2025/05/27 18:44:31 tsutsui Exp $     */
/*      $OpenBSD: tvrx.c,v 1.1 2006/04/14 21:05:43 miod Exp $   */

/*
 * Copyright (c) 2006, Miodrag Vallat.
 * 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.
 *
 * 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.
 *
 */

/*
 * dumb graphics routines for frame buffer on HP362 and HP382 based on tvrx.c
 */

#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 <dev/cons.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>

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

static int gendiofb_match(device_t, cfdata_t, void *);
static void gendiofb_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(gendiofb, sizeof(struct gendiofb_softc),
    gendiofb_match, gendiofb_attach, NULL, NULL);

static int gendiofb_reset(struct diofb *, int, struct diofbreg *);

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

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

/*
 * Attachment glue
 */

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

        if (da->da_id == DIO_DEVICE_ID_FRAMEBUFFER) {
                switch (da->da_secid) {
                case DIO_DEVICE_SECID_A147xVGA:
                case DIO_DEVICE_SECID_A1474MID:
                        return 1;
                }
        }

        return 0;
}

static void
gendiofb_attach(device_t parent, device_t self, void *aux)
{
        struct gendiofb_softc *sc = device_private(self);
        struct dio_attach_args *da = aux;
        bus_space_handle_t bsh;
        struct diofbreg *fbr;
        bus_size_t size;

        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;
                size = da->da_size;
                if (size > DIOII_DEVSIZE)       /* XXX */
                        size = DIOII_DEVSIZE;
                if (bus_space_map(da->da_bst, da->da_addr, size, 0,
                    &bsh)) {
                        aprint_error(": can't map framebuffer\n");
                        return;
                }
                fbr = bus_space_vaddr(da->da_bst, bsh);
                if (gendiofb_reset(sc->sc_fb, sc->sc_scode, fbr) != 0) {
                        aprint_error(": failed to reset\n");
                        return;
                }
        }

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

/*
 * Initialize hardware and display routines.
 */
static int
gendiofb_reset(struct diofb *fb, int scode, struct diofbreg *fbr)
{
        int rc;
        struct rasops_info *ri = &fb->ri;

        if ((rc = diofb_fbinquire(fb, scode, fbr)) != 0)
                return (rc);

        /*
         * We rely on the PROM to initialize the frame buffer in the mode
         * we expect it: cleared, overlay plane enabled and accessible
         * at the beginning of the video memory.
         *
         * This is NOT the mode we would end up by simply resetting the
         * board.
         */

        ri->ri_depth = 8;
        ri->ri_stride = (fb->fbwidth * ri->ri_depth) / 8;

        ri->ri_flg = RI_CENTER | RI_FULLCLEAR;
        if (fb == &diofb_cn)
                ri->ri_flg |= RI_NO_AUTO;       /* XXX */
        ri->ri_bits = fb->fbkva;
        ri->ri_width = fb->dwidth;
        ri->ri_height = fb->dheight;
        ri->ri_hw = fb;

        /*
         * Ask for an unholy big display, rasops will trim this to more
         * reasonable values.
         */
        rasops_init(ri, 160, 160);
        ri->ri_flg |= RI_FORCEMONO;     /* no colormap */

        diofb_resetcmap(fb);

        fb->wsd.name = fb->wsdname;
        fb->wsd.ncols = ri->ri_cols;
        fb->wsd.nrows = ri->ri_rows;
        fb->wsd.textops = &ri->ri_ops;
        fb->wsd.fontwidth = ri->ri_font->fontwidth;
        fb->wsd.fontheight = ri->ri_font->fontheight;
        fb->wsd.capabilities = ri->ri_caps;
        strlcpy(fb->wsdname, "std", sizeof(fb->wsdname));

        return 0;
}

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

        switch (cmd) {
        case WSDISPLAYIO_GTYPE:
                *(u_int *)data = WSDISPLAY_TYPE_UNKNOWN;
                return 0;
        case WSDISPLAYIO_SMODE:
                fb->mapmode = *(u_int *)data;
                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 = 0;
                return 0;
        case WSDISPLAYIO_LINEBYTES:
                *(u_int *)data = fb->ri.ri_stride;
                return 0;
        case WSDISPLAYIO_GETCMAP:
        case WSDISPLAYIO_PUTCMAP:
                /* until color support is implemented */
                return EPASSTHROUGH;
        case WSDISPLAYIO_GVIDEO:
        case WSDISPLAYIO_SVIDEO:
                /* unsupported */
                return EPASSTHROUGH;
        }

        return EPASSTHROUGH;
}


/*
 *  Console attachment
 */

int
gendiofbcnattach(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;
        bus_size_t 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 != DIO_DEVICE_SECID_A1474MID &&
             fbr->fbid != DIO_DEVICE_SECID_A147xVGA)) {
                bus_space_unmap(bst, bsh, PAGE_SIZE);
                return 1;
        }

        size = DIO_SIZE(scode, va);
        if (size > DIOII_DEVSIZE)       /* XXX */
                size = DIOII_DEVSIZE;

        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;
        gendiofb_reset(fb, conscode, (struct diofbreg *)conaddr);

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