/*	$OpenBSD: cgeight.c,v 1.23 2005/01/05 23:04:24 miod Exp $	*/
/*	$NetBSD: cgeight.c,v 1.13 1997/05/24 20:16:04 pk Exp $	*/

/*
 * Copyright (c) 2002 Miodrag Vallat.  All rights reserved.
 * Copyright (c) 1996 Jason R. Thorpe.  All rights reserved.
 * Copyright (c) 1995 Theo de Raadt
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Lawrence Berkeley Laboratory.
 *
 * 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 @(#)cgthree.c	8.2 (Berkeley) 10/30/93
 */

/*
 * color display (cgeight) driver.
 *
 * Does not handle interrupts, even though they can occur.
 *
 * XXX should defer colormap updates to vertical retrace interrupts
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/tty.h>
#include <sys/conf.h>

#include <uvm/uvm_extern.h>

#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <machine/eeprom.h>
#include <machine/conf.h>

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

#include <sparc/dev/btreg.h>
#include <sparc/dev/btvar.h>
#include <sparc/dev/pfourreg.h>

/* per-display variables */
struct cgeight_softc {
	struct	sunfb sc_sunfb;		/* common base part */
	struct	rom_reg	sc_phys;	/* display RAM (phys addr) */
	volatile struct fbcontrol *sc_fbc;	/* Brooktree registers */
	union	bt_cmap sc_cmap;	/* Brooktree color map */
	int	sc_nscreens;
};

int cgeight_ioctl(void *, u_long, caddr_t, int, struct proc *);
int cgeight_alloc_screen(void *, const struct wsscreen_descr *, void **,
    int *, int *, long *);
void cgeight_free_screen(void *, void *);
int cgeight_show_screen(void *, void *, int, void (*cb)(void *, int, int),
    void *);
paddr_t cgeight_mmap(void *, off_t, int);
void cgeight_reset(struct cgeight_softc *);
void cgeight_burner(void *, u_int, u_int);

struct wsdisplay_accessops cgeight_accessops = {
	cgeight_ioctl,
	cgeight_mmap,
	cgeight_alloc_screen,
	cgeight_free_screen,
	cgeight_show_screen,
	NULL,	/* load_font */
	NULL,	/* scrollback */
	NULL,	/* getchar */
	cgeight_burner,
};

void	cgeightattach(struct device *, struct device *, void *);
int	cgeightmatch(struct device *, void *, void *);

struct cfattach cgeight_ca = {
	sizeof(struct cgeight_softc), cgeightmatch, cgeightattach
};

struct cfdriver cgeight_cd = {
	NULL, "cgeight", DV_DULL
};

/*
 * Match a cgeight.
 */
int
cgeightmatch(parent, vcf, aux)
	struct device *parent;
	void *vcf, *aux;
{
	struct cfdata *cf = vcf;
	struct confargs *ca = aux;
	struct romaux *ra = &ca->ca_ra;

	/*
	 * Mask out invalid flags from the user.
	 */
	cf->cf_flags &= FB_USERMASK;

	if (strcmp(cf->cf_driver->cd_name, ra->ra_name))
		return (0);

	if (!CPU_ISSUN4 || ca->ca_bustype != BUS_OBIO)
		return (0);

	/*
	 * Make sure there's hardware there.
	 */
	if (probeget(ra->ra_vaddr, 4) == -1)
		return (0);

	/*
	 * Check the pfour register.
	 */
	if (fb_pfour_id(ra->ra_vaddr) == PFOUR_ID_COLOR24) {
		cf->cf_flags |= FB_PFOUR;
		return (1);
	}

	return (0);
}

/*
 * Attach a display.
 */
void
cgeightattach(parent, self, args)
	struct device *parent, *self;
	void *args;
{
	struct cgeight_softc *sc = (struct cgeight_softc *)self;
	struct confargs *ca = args;
	int node = 0, i;
	volatile struct bt_regs *bt;
	int isconsole = 0;

	sc->sc_sunfb.sf_flags = self->dv_cfdata->cf_flags;

	/* Map the pfour register. */
	sc->sc_sunfb.sf_pfour = (volatile u_int32_t *)
	    mapiodev(ca->ca_ra.ra_reg, 0, sizeof(u_int32_t));

	if (cputyp == CPU_SUN4) {
		struct eeprom *eep = (struct eeprom *)eeprom_va;

		/*
		 * Assume this is the console if there's no eeprom info
		 * to be found.
		 */
		if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT)
			isconsole = 1;
	}

	/* Map the Brooktree. */
	sc->sc_fbc = (volatile struct fbcontrol *)
	    mapiodev(ca->ca_ra.ra_reg,
		     PFOUR_COLOR_OFF_CMAP, sizeof(struct fbcontrol));

	sc->sc_phys = ca->ca_ra.ra_reg[0];

	/* grab initial (current) color map */
	bt = &sc->sc_fbc->fbc_dac;
	bt->bt_addr = 0;
	for (i = 0; i < 256 * 3 / 4; i++)
		sc->sc_cmap.cm_chip[i] = bt->bt_cmap;

	/* enable video */
	cgeight_burner(sc, 1, 0);
	BT_INIT(bt, 0);

	fb_setsize(&sc->sc_sunfb, 24, 1152, 900, node, ca->ca_bustype);
	sc->sc_sunfb.sf_ro.ri_hw = sc;
	sc->sc_sunfb.sf_ro.ri_bits =  mapiodev(ca->ca_ra.ra_reg,
	    PFOUR_COLOR_OFF_OVERLAY, round_page(sc->sc_sunfb.sf_fbsize));
	fbwscons_init(&sc->sc_sunfb, isconsole ? 0 : RI_CLEAR);

	printf(": cgeight/p4, %dx%d", sc->sc_sunfb.sf_width,
	    sc->sc_sunfb.sf_height);

	if (isconsole) {
		fbwscons_console_init(&sc->sc_sunfb, -1, cgeight_burner);
	}

	fbwscons_attach(&sc->sc_sunfb, &cgeight_accessops, isconsole);
}

int
cgeight_ioctl(v, cmd, data, flags, p)
	void *v;
	u_long cmd;
	caddr_t data;
	int flags;
	struct proc *p;
{
	struct cgeight_softc *sc = v;
	struct wsdisplay_cmap *cm;
	struct wsdisplay_fbinfo *wdf;
	int error;

	switch (cmd) {
	case WSDISPLAYIO_GTYPE:
		*(u_int *)data = WSDISPLAY_TYPE_SUNCG8;
		break;
	case WSDISPLAYIO_GINFO:
		wdf = (struct wsdisplay_fbinfo *)data;
		wdf->height = sc->sc_sunfb.sf_height;
		wdf->width = sc->sc_sunfb.sf_width;
		wdf->depth = sc->sc_sunfb.sf_depth;
		wdf->cmsize = 256;
		break;
	case WSDISPLAYIO_GETCMAP:
		cm = (struct wsdisplay_cmap *)data;
		error = bt_getcmap(&sc->sc_cmap, cm);
		if (error)
			return (error);
		break;
	case WSDISPLAYIO_PUTCMAP:
		cm = (struct wsdisplay_cmap *)data;
		error = bt_putcmap(&sc->sc_cmap, cm);
		if (error)
			return (error);
		bt_loadcmap(&sc->sc_cmap, &sc->sc_fbc->fbc_dac,
		    cm->index, cm->count, 0);
		break;

	case WSDISPLAYIO_SVIDEO:
	case WSDISPLAYIO_GVIDEO:
		break;

	case WSDISPLAYIO_GCURPOS:
	case WSDISPLAYIO_SCURPOS:
	case WSDISPLAYIO_GCURMAX:
	case WSDISPLAYIO_GCURSOR:
	case WSDISPLAYIO_SCURSOR:
	default:
		return (-1);	/* not supported yet */

	}

	return (0);
}

int
cgeight_alloc_screen(v, type, cookiep, curxp, curyp, attrp)
	void *v;
	const struct wsscreen_descr *type;
	void **cookiep;
	int *curxp, *curyp;
	long *attrp;
{
	struct cgeight_softc *sc = v;

	if (sc->sc_nscreens > 0)
		return (ENOMEM);

	*cookiep = &sc->sc_sunfb.sf_ro;
	*curyp = 0;
	*curxp = 0;
	sc->sc_sunfb.sf_ro.ri_ops.alloc_attr(&sc->sc_sunfb.sf_ro,
	    0, 0, 0, attrp);
	sc->sc_nscreens++;
	return (0);
}

void
cgeight_free_screen(v, cookie)
	void *v;
	void *cookie;
{
	struct cgeight_softc *sc = v;

	sc->sc_nscreens--;
}

int
cgeight_show_screen(v, cookie, waitok, cb, cbarg)
	void *v;
	void *cookie;
	int waitok;
	void (*cb)(void *, int, int);
	void *cbarg;
{
	return (0);
}

/*
 * Return the address that would map the given device at the given
 * offset, allowing for the given protection, or return -1 for error.
 */
paddr_t
cgeight_mmap(v, offset, prot)
	void *v;
	off_t offset;
	int prot;
{
	struct cgeight_softc *sc = v;

	if (offset & PGOFSET)
		return (-1);

	/* Allow mapping as a dumb framebuffer from offset 0 */
	if (offset >= 0 && offset < sc->sc_sunfb.sf_fbsize) {
		return (REG2PHYS(&sc->sc_phys, offset +
		    PFOUR_COLOR_OFF_OVERLAY) | PMAP_NC);
	}

	return (-1);	/* not a user-map offset */
}

void
cgeight_burner(v, on, flags)
	void *v;
	u_int on, flags;
{
	struct cgeight_softc *sc = v;

	fb_pfour_set_video(&sc->sc_sunfb, on);
}