NetBSD/sys/arch/sparc64/dev/ffb.c

/*	$NetBSD: ffb.c,v 1.36 2008/11/16 05:10:46 macallan Exp $	*/
/*	$OpenBSD: creator.c,v 1.20 2002/07/30 19:48:15 jason Exp $	*/

/*
 * Copyright (c) 2002 Jason L. Wright (jason@thought.net)
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Jason L. Wright
 * 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: ffb.c,v 1.36 2008/11/16 05:10:46 macallan Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/mman.h>

#include <machine/bus.h>
#include <machine/autoconf.h>
#include <machine/openfirm.h>
#include <machine/vmparam.h>

#include <dev/wscons/wsconsio.h>
#include <dev/sun/fbio.h>
#include <dev/sun/fbvar.h>

#include <dev/wsfont/wsfont.h>
#include <dev/wscons/wsdisplay_vconsvar.h>

#include <sparc64/dev/ffbreg.h>
#include <sparc64/dev/ffbvar.h>

#ifndef WS_DEFAULT_BG
/* Sun -> background should be white */
#define WS_DEFAULT_BG 0xf
#endif

extern struct cfdriver ffb_cd;

struct wsscreen_descr ffb_stdscreen = {
	"sunffb",
	0, 0,	/* will be filled in -- XXX shouldn't, it's global. */
	0,
	0, 0,
	WSSCREEN_REVERSE | WSSCREEN_WSCOLORS,
	NULL	/* modecookie */
};

const struct wsscreen_descr *ffb_scrlist[] = {
	&ffb_stdscreen,
	/* XXX other formats? */
};

struct wsscreen_list ffb_screenlist = {
	sizeof(ffb_scrlist) / sizeof(struct wsscreen_descr *),
	    ffb_scrlist
};

static struct vcons_screen ffb_console_screen;

int	ffb_ioctl(void *, void *, u_long, void *, int, struct lwp *);
static int ffb_blank(struct ffb_softc *, u_long, u_int *);
paddr_t ffb_mmap(void *, void *, off_t, int);
void	ffb_ras_fifo_wait(struct ffb_softc *, int);
void	ffb_ras_wait(struct ffb_softc *);
void	ffb_ras_init(struct ffb_softc *);
void	ffb_ras_copyrows(void *, int, int, int);
void	ffb_ras_erasecols(void *, int, int, int, long int);
void	ffb_ras_eraserows(void *, int, int, long int);
void	ffb_ras_do_cursor(struct rasops_info *);
void	ffb_ras_fill(struct ffb_softc *);
void	ffb_ras_setfg(struct ffb_softc *, int32_t);

void	ffb_clearscreen(struct ffb_softc *);
int	ffb_load_font(void *, void *, struct wsdisplay_font *);
void	ffb_init_screen(void *, struct vcons_screen *, int, 
	    long *);
int	ffb_allocattr(void *, int, int, int, long *);
void	ffb_putchar(void *, int, int, u_int, long);
void	ffb_cursor(void *, int, int, int);

/* frame buffer generic driver */   
static void ffbfb_unblank(struct device*);
dev_type_open(ffbfb_open);
dev_type_close(ffbfb_close);
dev_type_ioctl(ffbfb_ioctl);
dev_type_mmap(ffbfb_mmap);

static struct fbdriver ffb_fbdriver = {
        ffbfb_unblank, ffbfb_open, ffbfb_close, ffbfb_ioctl, nopoll,
	ffbfb_mmap, nokqfilter
};

struct wsdisplay_accessops ffb_accessops = {
	.ioctl = ffb_ioctl,
	.mmap = ffb_mmap,
};

void
ffb_attach(struct ffb_softc *sc)
{
	struct wsemuldisplaydev_attach_args waa;
	struct rasops_info *ri;
	long defattr;
	const char *model;
	int btype;
	uint32_t dac;
	int maxrow, maxcol;
	u_int blank = WSDISPLAYIO_VIDEO_ON;
	char buf[6+1];

	printf(":");
	
	sc->putchar = NULL;
	
	if (sc->sc_type == FFB_CREATOR) {
		btype = prom_getpropint(sc->sc_node, "board_type", 0);
		if ((btype & 7) == 3)
			printf(" Creator3D");
		else
			printf(" Creator");
	} else
		printf(" Elite3D");

	model = prom_getpropstring(sc->sc_node, "model");
	if (model == NULL || strlen(model) == 0)
		model = "unknown";

	sc->sc_depth = 24;
	sc->sc_linebytes = 8192;
	sc->sc_height = prom_getpropint(sc->sc_node, "height", 0);
	sc->sc_width = prom_getpropint(sc->sc_node, "width", 0);
	
	sc->sc_locked = 0;
	sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
	
	maxcol = (prom_getoption("screen-#columns", buf, sizeof buf) == 0)
		? strtoul(buf, NULL, 10)
		: 80;

	maxrow = (prom_getoption("screen-#rows", buf, sizeof buf) != 0)
		? strtoul(buf, NULL, 10)
		: 34;

	ffb_ras_init(sc);

	/* collect DAC version, as Elite3D cursor enable bit is reversed */
	DAC_WRITE(sc, FFB_DAC_TYPE, FFB_DAC_GVERS);
	dac = DAC_READ(sc, FFB_DAC_VALUE);
	sc->sc_dacrev = (dac >> 28) & 0xf;

	if (sc->sc_type == FFB_AFB) {
		sc->sc_dacrev = 10;
		sc->sc_needredraw = 0;
	} else {
		/* see what kind of DAC we have */
		int pnum = (dac & 0x0ffff000) >> 12;
		if (pnum == 0x236e) {
			sc->sc_needredraw = 0;
		} else {
			sc->sc_needredraw = 1;
		}
	}
	printf(", model %s, dac %u\n", model, sc->sc_dacrev);
	if (sc->sc_needredraw) 
		printf("%s: found old DAC, enabling redraw on unblank\n", 
		    device_xname(&sc->sc_dv));

	ffb_blank(sc, WSDISPLAYIO_SVIDEO, &blank);

	sc->sc_accel = ((device_cfdata(&sc->sc_dv)->cf_flags &
	    FFB_CFFLAG_NOACCEL) == 0);
		
	wsfont_init();

	vcons_init(&sc->vd, sc, &ffb_stdscreen, &ffb_accessops);
	sc->vd.init_screen = ffb_init_screen;

	/* we mess with ffb_console_screen only once */
	if (sc->sc_console) {
		vcons_init_screen(&sc->vd, &ffb_console_screen, 1, &defattr);
		SCREEN_VISIBLE((&ffb_console_screen));
		/* 
		 * XXX we shouldn't use a global variable for the console
		 * screen
		 */
		sc->vd.active = &ffb_console_screen;
		ffb_console_screen.scr_flags = VCONS_SCREEN_IS_STATIC;
	} else {
		if (ffb_console_screen.scr_ri.ri_rows == 0) {
			/* do some minimal setup to avoid weirdnesses later */
			vcons_init_screen(&sc->vd, &ffb_console_screen, 1, &defattr);
		}
	}
	ri = &ffb_console_screen.scr_ri;

	ffb_stdscreen.nrows = ri->ri_rows;
	ffb_stdscreen.ncols = ri->ri_cols;
	ffb_stdscreen.textops = &ri->ri_ops;
	ffb_stdscreen.capabilities = ri->ri_caps;
	
	sc->sc_fb.fb_driver = &ffb_fbdriver;
	sc->sc_fb.fb_type.fb_cmsize = 0;
	sc->sc_fb.fb_type.fb_size = maxrow * sc->sc_linebytes;
	sc->sc_fb.fb_type.fb_type = FBTYPE_CREATOR;
	sc->sc_fb.fb_type.fb_width = sc->sc_width;
	sc->sc_fb.fb_type.fb_depth = sc->sc_depth;
	sc->sc_fb.fb_type.fb_height = sc->sc_height;
	sc->sc_fb.fb_device = &sc->sc_dv;
	fb_attach(&sc->sc_fb, sc->sc_console);

	if (sc->sc_console) {
		wsdisplay_cnattach(&ffb_stdscreen, ri, 0, 0, defattr);
	}

	ffb_clearscreen(sc);
	
	waa.console = sc->sc_console;
	waa.scrdata = &ffb_screenlist;
	waa.accessops = &ffb_accessops;
	waa.accesscookie = &sc->vd;
	config_found(&sc->sc_dv, &waa, wsemuldisplaydevprint);
}

int
ffb_ioctl(void *v, void *vs, u_long cmd, void *data, int flags, struct lwp *l)
{
	struct vcons_data *vd = v;
	struct ffb_softc *sc = vd->cookie;
	struct wsdisplay_fbinfo *wdf;
	struct vcons_screen *ms = vd->active;
	
#ifdef FFBDEBUG
	printf("ffb_ioctl: %s cmd _IO%s%s('%c', %lu)\n",
	       device_xname(&sc->sc_dv),
	       (cmd & IOC_IN) ? "W" : "", (cmd & IOC_OUT) ? "R" : "",
	       (char)IOCGROUP(cmd), cmd & 0xff);
#endif

	switch (cmd) {
	case FBIOGTYPE:
		*(struct fbtype *)data = sc->sc_fb.fb_type;
		break;
	case FBIOGATTR:
#define fba ((struct fbgattr *)data)
		fba->real_type = sc->sc_fb.fb_type.fb_type;
		fba->owner = 0; 	/* XXX ??? */
		fba->fbtype = sc->sc_fb.fb_type;
		fba->sattr.flags = 0;
		fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type;
		fba->sattr.dev_specific[0] = -1;
		fba->emu_types[0] = sc->sc_fb.fb_type.fb_type;
		fba->emu_types[1] = -1;
#undef fba
		break; 

	case FBIOGETCMAP:
	case FBIOPUTCMAP:
		return EIO;

	case FBIOGVIDEO:
	case FBIOSVIDEO:
		return ffb_blank(sc, cmd == FBIOGVIDEO?
		    WSDISPLAYIO_GVIDEO : WSDISPLAYIO_SVIDEO,
		    (u_int *)data);
		break;
	case FBIOGCURSOR:
	case FBIOSCURSOR:
		/* the console driver is not using the hardware cursor */
		break;
	case FBIOGCURPOS:
		printf("%s: FBIOGCURPOS not implemented\n", device_xname(&sc->sc_dv));
		return EIO;
	case FBIOSCURPOS:
		printf("%s: FBIOSCURPOS not implemented\n", device_xname(&sc->sc_dv));
		return EIO;
	case FBIOGCURMAX:
		printf("%s: FBIOGCURMAX not implemented\n", device_xname(&sc->sc_dv));
		return EIO;

	case WSDISPLAYIO_GTYPE:
		*(u_int *)data = WSDISPLAY_TYPE_SUNFFB;
		break;
	case WSDISPLAYIO_SMODE:
		{ 
			if (sc->sc_mode != *(u_int *)data) {
				sc->sc_mode = *(u_int *)data;
				if ((sc->sc_mode == WSDISPLAYIO_MODE_EMUL) &&
				    (sc->sc_locked == 0)) {
					ffb_ras_init(sc);		
					vcons_redraw_screen(ms);
				}
			}
		}		
		break;
	case WSDISPLAYIO_GINFO:
		wdf = (void *)data;
		wdf->height = sc->sc_height;
		wdf->width  = sc->sc_width;
		wdf->depth  = 32;
		wdf->cmsize = 256; /* XXX */
		break;
#ifdef WSDISPLAYIO_LINEBYTES
	case WSDISPLAYIO_LINEBYTES:
		*(u_int *)data = sc->sc_linebytes;
		break;
#endif
	case WSDISPLAYIO_GETCMAP:
		break;/* XXX */

	case WSDISPLAYIO_PUTCMAP:
		break;/* XXX */

	case WSDISPLAYIO_SVIDEO:
	case WSDISPLAYIO_GVIDEO:
		return(ffb_blank(sc, cmd, (u_int *)data));
		break;
	case WSDISPLAYIO_GCURPOS:
	case WSDISPLAYIO_SCURPOS:
	case WSDISPLAYIO_GCURMAX:
	case WSDISPLAYIO_GCURSOR:
	case WSDISPLAYIO_SCURSOR:
		return EIO; /* not supported yet */
	default:
		return EPASSTHROUGH;
        }

	return (0);
}

/* blank/unblank the screen */
static int
ffb_blank(struct ffb_softc *sc, u_long cmd, u_int *data)
{
	struct vcons_screen *ms = sc->vd.active;
	u_int val;
	
	DAC_WRITE(sc, FFB_DAC_TYPE, FFB_DAC_GSBLANK);
	val = DAC_READ(sc, FFB_DAC_VALUE);

	switch (cmd) {
	case WSDISPLAYIO_GVIDEO:
		*data = val & 1;
		return(0);
		break;
	case WSDISPLAYIO_SVIDEO:
		if (*data == WSDISPLAYIO_VIDEO_OFF)
			val &= ~1;
		else if (*data == WSDISPLAYIO_VIDEO_ON)
			val |= 1;
		else
			return(EINVAL);
		break;
	default:
		return(EINVAL);
	}

	DAC_WRITE(sc, FFB_DAC_TYPE, FFB_DAC_GSBLANK);
	DAC_WRITE(sc, FFB_DAC_VALUE, val);
	
	if ((val & 1) && sc->sc_needredraw) {
		if (ms != NULL) {
			if ((sc->sc_mode == WSDISPLAYIO_MODE_EMUL) && 
			    (sc->sc_locked == 0)) {
				ffb_ras_init(sc);		
				vcons_redraw_screen(ms);
			}
		}
	}

	return(0);
}

paddr_t
ffb_mmap(void *vsc, void *vs, off_t off, int prot)
{
	struct vcons_data *vd = vsc;
	struct ffb_softc *sc = vd->cookie;
	int i;

	switch (sc->sc_mode) {
	case WSDISPLAYIO_MODE_MAPPED:
		for (i = 0; i < sc->sc_nreg; i++) {
			/* Before this set? */
			if (off < sc->sc_addrs[i])
				continue;
			/* After this set? */
			if (off >= (sc->sc_addrs[i] + sc->sc_sizes[i]))
				continue;

			return (bus_space_mmap(sc->sc_bt, sc->sc_addrs[i],
			    off - sc->sc_addrs[i], prot, BUS_SPACE_MAP_LINEAR));
		}
		break;
#ifdef WSDISPLAYIO_MODE_DUMBFB
	case WSDISPLAYIO_MODE_DUMBFB:
		if (sc->sc_nreg < FFB_REG_DFB24)
			break;
		if (off >= 0 && off < sc->sc_sizes[FFB_REG_DFB24])
			return (bus_space_mmap(sc->sc_bt,
			    sc->sc_addrs[FFB_REG_DFB24], off, prot,
			    BUS_SPACE_MAP_LINEAR));
		break;
#endif
	}

	return (-1);
}

void
ffb_ras_fifo_wait(struct ffb_softc *sc, int n)
{
	int32_t cache = sc->sc_fifo_cache;

	if (cache < n) {
		do {
			cache = FBC_READ(sc, FFB_FBC_UCSR);
			cache = (cache & FBC_UCSR_FIFO_MASK) - 8;
		} while (cache < n);
	}
	sc->sc_fifo_cache = cache - n;
}

void
ffb_ras_wait(struct ffb_softc *sc)
{
	uint32_t ucsr, r;

	while (1) {
		ucsr = FBC_READ(sc, FFB_FBC_UCSR);
		if ((ucsr & (FBC_UCSR_FB_BUSY|FBC_UCSR_RP_BUSY)) == 0)
			break;
		r = ucsr & (FBC_UCSR_READ_ERR | FBC_UCSR_FIFO_OVFL);
		if (r != 0)
			FBC_WRITE(sc, FFB_FBC_UCSR, r);
	}
}

void
ffb_ras_init(struct ffb_softc *sc)
{
	ffb_ras_fifo_wait(sc, 7);
	FBC_WRITE(sc, FFB_FBC_PPC,
	    FBC_PPC_VCE_DIS | FBC_PPC_TBE_OPAQUE |
	    FBC_PPC_APE_DIS | FBC_PPC_CS_CONST);
	FBC_WRITE(sc, FFB_FBC_FBC,
	    FFB_FBC_WB_A | FFB_FBC_RB_A | FFB_FBC_SB_BOTH |
	    FFB_FBC_XE_OFF | FFB_FBC_RGBE_MASK);
	FBC_WRITE(sc, FFB_FBC_ROP, FBC_ROP_NEW);
	FBC_WRITE(sc, FFB_FBC_DRAWOP, FBC_DRAWOP_RECTANGLE);
	FBC_WRITE(sc, FFB_FBC_PMASK, 0xffffffff);
	FBC_WRITE(sc, FFB_FBC_FONTINC, 0x10000);
	sc->sc_fg_cache = 0;
	FBC_WRITE(sc, FFB_FBC_FG, sc->sc_fg_cache);
	ffb_ras_wait(sc);
}

void
ffb_ras_eraserows(void *cookie, int row, int n, long attr)
{
	struct rasops_info *ri = cookie;
	struct vcons_screen *scr = ri->ri_hw;
	struct ffb_softc *sc = scr->scr_cookie;

	if (row < 0) {
		n += row;
		row = 0;
	}
	if (row + n > ri->ri_rows)
		n = ri->ri_rows - row;
	if (n <= 0)
		return;
	
	ffb_ras_fill(sc);
	ffb_ras_setfg(sc, ri->ri_devcmap[(attr >> 16) & 0xf]);
	ffb_ras_fifo_wait(sc, 4);
	if ((n == ri->ri_rows) && (ri->ri_flg & RI_FULLCLEAR)) {
		FBC_WRITE(sc, FFB_FBC_BY, 0);
		FBC_WRITE(sc, FFB_FBC_BX, 0);
		FBC_WRITE(sc, FFB_FBC_BH, ri->ri_height);
		FBC_WRITE(sc, FFB_FBC_BW, ri->ri_width);
	} else {
		row *= ri->ri_font->fontheight;
		FBC_WRITE(sc, FFB_FBC_BY, ri->ri_yorigin + row);
		FBC_WRITE(sc, FFB_FBC_BX, ri->ri_xorigin);
		FBC_WRITE(sc, FFB_FBC_BH, n * ri->ri_font->fontheight);
		FBC_WRITE(sc, FFB_FBC_BW, ri->ri_emuwidth);
	}
	ffb_ras_wait(sc);
}

void
ffb_ras_erasecols(void *cookie, int row, int col, int n, long attr)
{
	struct rasops_info *ri = cookie;
	struct vcons_screen *scr = ri->ri_hw;
	struct ffb_softc *sc = scr->scr_cookie;

	if ((row < 0) || (row >= ri->ri_rows))
		return;
	if (col < 0) {
		n += col;
		col = 0;
	}
	if (col + n > ri->ri_cols)
		n = ri->ri_cols - col;
	if (n <= 0)
		return;
	n *= ri->ri_font->fontwidth;
	col *= ri->ri_font->fontwidth;
	row *= ri->ri_font->fontheight;

	ffb_ras_fill(sc);
	ffb_ras_setfg(sc, ri->ri_devcmap[(attr >> 16) & 0xf]);
	ffb_ras_fifo_wait(sc, 4);
	FBC_WRITE(sc, FFB_FBC_BY, ri->ri_yorigin + row);
	FBC_WRITE(sc, FFB_FBC_BX, ri->ri_xorigin + col);
	FBC_WRITE(sc, FFB_FBC_BH, ri->ri_font->fontheight);
	FBC_WRITE(sc, FFB_FBC_BW, n - 1);
	ffb_ras_wait(sc);
}

void
ffb_ras_fill(struct ffb_softc *sc)
{
	ffb_ras_fifo_wait(sc, 2);
	FBC_WRITE(sc, FFB_FBC_ROP, FBC_ROP_NEW);
	FBC_WRITE(sc, FFB_FBC_DRAWOP, FBC_DRAWOP_RECTANGLE);
	ffb_ras_wait(sc);
}

void
ffb_ras_copyrows(void *cookie, int src, int dst, int n)
{
	struct rasops_info *ri = cookie;
	struct vcons_screen *scr = ri->ri_hw;
	struct ffb_softc *sc = scr->scr_cookie;

	if (dst == src)
		return;
	if (src < 0) {
		n += src;
		src = 0;
	}
	if ((src + n) > ri->ri_rows)
		n = ri->ri_rows - src;
	if (dst < 0) {
		n += dst;
		dst = 0;
	}
	if ((dst + n) > ri->ri_rows)
		n = ri->ri_rows - dst;
	if (n <= 0)
		return;
	n *= ri->ri_font->fontheight;
	src *= ri->ri_font->fontheight;
	dst *= ri->ri_font->fontheight;

	ffb_ras_fifo_wait(sc, 8);
	FBC_WRITE(sc, FFB_FBC_ROP, FBC_ROP_OLD | (FBC_ROP_OLD << 8));
	FBC_WRITE(sc, FFB_FBC_DRAWOP, FBC_DRAWOP_VSCROLL);
	FBC_WRITE(sc, FFB_FBC_BY, ri->ri_yorigin + src);
	FBC_WRITE(sc, FFB_FBC_BX, ri->ri_xorigin);
	FBC_WRITE(sc, FFB_FBC_DY, ri->ri_yorigin + dst);
	FBC_WRITE(sc, FFB_FBC_DX, ri->ri_xorigin);
	FBC_WRITE(sc, FFB_FBC_BH, n);
	FBC_WRITE(sc, FFB_FBC_BW, ri->ri_emuwidth);
	ffb_ras_wait(sc);
}

void
ffb_ras_setfg(struct ffb_softc *sc, int32_t fg)
{
	ffb_ras_fifo_wait(sc, 1);
	if (fg == sc->sc_fg_cache)
		return;
	sc->sc_fg_cache = fg;
	FBC_WRITE(sc, FFB_FBC_FG, fg);
	ffb_ras_wait(sc);
}

/* frame buffer generic driver support functions */   
static void
ffbfb_unblank(struct device *dev)
{
	struct ffb_softc *sc = device_private(dev);
	struct vcons_screen *ms = sc->vd.active;
	u_int on = 1;
	int redraw = 0;
	
	ffb_ras_init(sc);
	if (sc->sc_locked) {
		sc->sc_locked = 0;
		redraw = 1;
	}
	
	ffb_blank(sc, WSDISPLAYIO_SVIDEO, &on);
#if 0
	if ((sc->vd.active != &ffb_console_screen) &&
	    (ffb_console_screen.scr_flags & VCONS_SCREEN_IS_STATIC)) {
		/* 
		 * force-switch to the console screen.
		 * Caveat: the higher layer will think we're still on the
		 * other screen
		 */
		
		SCREEN_INVISIBLE(sc->vd.active);
		sc->vd.active = &ffb_console_screen;
		SCREEN_VISIBLE(sc->vd.active);
		ms = sc->vd.active;
		redraw = 1;
	}
#endif	
	if (redraw) {
		vcons_redraw_screen(ms);
	}
}

int
ffbfb_open(dev_t dev, int flags, int mode, struct lwp *l)
{
	struct ffb_softc *sc;

	sc = device_lookup_private(&ffb_cd, minor(dev));
	if (sc == NULL)
		return ENXIO;
		
	sc->sc_locked = 1;
	return 0;
}

int
ffbfb_close(dev_t dev, int flags, int mode, struct lwp *l)
{
	struct ffb_softc *sc = device_lookup_private(&ffb_cd, minor(dev));
	struct vcons_screen *ms = sc->vd.active;
	
	sc->sc_locked = 0;
	if (ms != NULL) {
		if ((sc->sc_mode == WSDISPLAYIO_MODE_EMUL) &&
		    (sc->sc_locked == 0)) {
			ffb_ras_init(sc);		
			vcons_redraw_screen(ms);
		}
	}
	return 0;
}

int
ffbfb_ioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l)
{
	struct ffb_softc *sc = device_lookup_private(&ffb_cd, minor(dev));

	return ffb_ioctl(&sc->vd, NULL, cmd, data, flags, l);
}

paddr_t
ffbfb_mmap(dev_t dev, off_t off, int prot)
{
	struct ffb_softc *sc = device_lookup_private(&ffb_cd, minor(dev));
	uint64_t size;
	int i, reg;
	off_t o;

	/*
	 * off is a magic cookie (see xfree86/drivers/sunffb/ffb.h),
	 * which we map to an index into the "reg" property, and use
	 * our copy of the firmware data as arguments for the real
	 * mapping.
	 */
	static struct { unsigned long voff; int reg; } map[] = {
		{ 0x00000000, FFB_REG_SFB8R },
		{ 0x00400000, FFB_REG_SFB8G },
		{ 0x00800000, FFB_REG_SFB8B },
		{ 0x00c00000, FFB_REG_SFB8X },
		{ 0x01000000, FFB_REG_SFB32 },
		{ 0x02000000, FFB_REG_SFB64  },
		{ 0x04000000, FFB_REG_FBC },
		{ 0x04004000, FFB_REG_DFB8R },
		{ 0x04404000, FFB_REG_DFB8G },
		{ 0x04804000, FFB_REG_DFB8B },
		{ 0x04c04000, FFB_REG_DFB8X },
		{ 0x05004000, FFB_REG_DFB24 },
		{ 0x06004000, FFB_REG_DFB32 },
		{ 0x07004000, FFB_REG_DFB422A },
		{ 0x0bc06000, FFB_REG_DAC },
		{ 0x0bc08000, FFB_REG_PROM },
		{ 0x0bc18000, 0 }
	};

	/* special value "FFB_EXP_VOFF" - not backed by any "reg" entry */
	if (off == 0x0bc18000)
		return bus_space_mmap(sc->sc_bt, sc->sc_addrs[FFB_REG_PROM],
		    0x00200000, prot, BUS_SPACE_MAP_LINEAR);
		    
	/* 
	 * FFB_VOFF_FBC_KREGS - used by afbinit to upload firmware. We should 
	 * probably mmap them only on afb boards 
	 */
	if ((off >= 0x0bc04000) && (off < 0x0bc06000))
		return bus_space_mmap(sc->sc_bt, sc->sc_addrs[FFB_REG_PROM], 
		    0x00610000 + (off - 0x0bc04000), prot, 
		    BUS_SPACE_MAP_LINEAR);
		    
#define NELEMS(arr) (sizeof(arr)/sizeof((arr)[0]))

	/* the map is ordered by voff */
	for (i = 0; i < NELEMS(map)-1; i++) {
		reg = map[i].reg;
		/* the number of entries in reg seems to vary */
		if (reg < sc->sc_nreg) {
			size = min((map[i + 1].voff - map[i].voff), 
			    sc->sc_sizes[reg]);
			if ((off >= map[i].voff) && 
			    (off < (map[i].voff + size))) {
				o = off - map[i].voff;
				return bus_space_mmap(sc->sc_bt, 
				    sc->sc_addrs[reg], o, prot, 
				    BUS_SPACE_MAP_LINEAR);
			}
		}
	}

	return -1;
}

void
ffb_clearscreen(struct ffb_softc *sc)
{
	struct rasops_info *ri = &ffb_console_screen.scr_ri;
	ffb_ras_fill(sc);
	ffb_ras_setfg(sc, ri->ri_devcmap[WS_DEFAULT_BG]);
	ffb_ras_fifo_wait(sc, 4);
	FBC_WRITE(sc, FFB_FBC_BY, 0);
	FBC_WRITE(sc, FFB_FBC_BX, 0);
	FBC_WRITE(sc, FFB_FBC_BH, sc->sc_height);
	FBC_WRITE(sc, FFB_FBC_BW, sc->sc_width);
}

void
ffb_cursor(void *cookie, int on, int row, int col)
{
	struct rasops_info *ri = cookie;
	struct vcons_screen *scr;
	struct ffb_softc *sc;
	int x, y, wi, he, coffset;
	
	if (cookie != NULL) {
		scr = ri->ri_hw;
		sc = scr->scr_cookie;
	
		wi = ri->ri_font->fontwidth;
		he = ri->ri_font->fontheight;

		if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
			x = ri->ri_ccol * wi + ri->ri_xorigin;
			y = ri->ri_crow * he + ri->ri_yorigin;
	
			if (ri->ri_flg & RI_CURSOR) {
				/* remove cursor */
				coffset = ri->ri_ccol + (ri->ri_crow *
				    ri->ri_cols);
#ifdef WSDISPLAY_SCROLLSUPPORT
				coffset += scr->scr_offset_to_zero;
#endif
				ffb_ras_wait(sc);
				sc->putchar(cookie, ri->ri_crow, 
				    ri->ri_ccol, scr->scr_chars[coffset], 
				    scr->scr_attrs[coffset]);
				ri->ri_flg &= ~RI_CURSOR;
			}
			ri->ri_crow = row;
			ri->ri_ccol = col;
			if (on)
			{
				long attr, revattr;
				x = ri->ri_ccol * wi + ri->ri_xorigin;
				y = ri->ri_crow * he + ri->ri_yorigin;
				coffset = col + (row * ri->ri_cols);
#ifdef WSDISPLAY_SCROLLSUPPORT
				coffset += scr->scr_offset_to_zero;
#endif
				attr = scr->scr_attrs[coffset];
#ifdef FFB_CURSOR_SWAP_COLOURS
				revattr=((attr >> 8 ) & 0x000f0000) | ((attr & 
				    0x000f0000)<<8) | (attr & 0x0000ffff);
#else
				revattr = attr ^ 0xffff0000;
#endif
				ffb_ras_wait(sc);
				sc->putchar(cookie, ri->ri_crow, ri->ri_ccol,
				    scr->scr_chars[coffset], revattr);
				ri->ri_flg |= RI_CURSOR;
			}
		} else {
			ri->ri_crow = row;
			ri->ri_ccol = col;
			ri->ri_flg &= ~RI_CURSOR;
		}
	}
}

void
ffb_putchar(void *cookie, int row, int col, u_int c, long attr)
{
	struct rasops_info *ri = cookie;
	struct vcons_screen *scr = ri->ri_hw;
	struct ffb_softc *sc = scr->scr_cookie;
	
	if (sc->putchar != NULL) {
		/* 
		 * the only reason why we need to hook putchar - wait for
		 * the drawing engine to be idle so we don't interfere
		 * ( and we should really use the colour expansion hardware )
		 */
		ffb_ras_wait(sc);
		sc->putchar(cookie, row, col, c, attr);
	}
}

int
ffb_allocattr(void *cookie, int fg, int bg, int flags, long *attrp)
{
	if ((fg == 0) && (bg == 0))
	{
		fg = WS_DEFAULT_FG;
		bg = WS_DEFAULT_BG;
	}
	if (flags & WSATTR_REVERSE) {
		*attrp = (bg & 0xff) << 24 | (fg & 0xff) << 16 | 
		    (flags & 0xff);
	} else
		*attrp = (fg & 0xff) << 24 | (bg & 0xff) << 16 | 
		    (flags & 0xff);
	return 0;
}

void
ffb_init_screen(void *cookie, struct vcons_screen *scr,
    int existing, long *defattr)
{
	struct ffb_softc *sc = cookie;
	struct rasops_info *ri = &scr->scr_ri;

	ri->ri_depth = 32;
	ri->ri_width = sc->sc_width;
	ri->ri_height = sc->sc_height;
	ri->ri_stride = sc->sc_linebytes;
	ri->ri_flg = RI_CENTER;

	ri->ri_bits = bus_space_vaddr(sc->sc_bt, sc->sc_pixel_h);
	
#ifdef FFBDEBUG
	printf("addr: %08lx\n",(ulong)ri->ri_bits);
#endif
	rasops_init(ri, sc->sc_height/8, sc->sc_width/8);
	ri->ri_caps = WSSCREEN_WSCOLORS;
	rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight,
		    sc->sc_width / ri->ri_font->fontwidth);

	/* enable acceleration */
	ri->ri_ops.copyrows = ffb_ras_copyrows;
	ri->ri_ops.eraserows = ffb_ras_eraserows;
	ri->ri_ops.erasecols = ffb_ras_erasecols;
	ri->ri_ops.cursor = ffb_cursor;
	ri->ri_ops.allocattr = ffb_allocattr;
	if (sc->putchar == NULL)
		sc->putchar = ri->ri_ops.putchar;
	ri->ri_ops.putchar = ffb_putchar;
}