/*	$NetBSD: grf.c,v 1.21 1995/04/29 20:23:39 briggs Exp $	*/

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1990 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. 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, Berkeley and its contributors.
 * 4. 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 $Hdr: grf.c 1.31 91/01/21$
 *
 *	@(#)grf.c	7.8 (Berkeley) 5/7/91
 */

/*
 * Graphics display driver for the Macintosh.
 * This is the hardware-independent portion of the driver.
 * Hardware access is through the grfdev routines below.
 */

#include <sys/param.h>

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

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

#include <miscfs/specfs/specdev.h>

#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>

#include "nubus.h"
#include "grfvar.h"

#include "grf.h"
#include "ite.h"

#if NITE == 0
#define	iteon(u,f)
#define	iteoff(u,f)
#endif

static int	grf_match __P((/*struct device *parent, struct device *dev,
				    void *aux*/));
static void	grf_attach __P((struct device *parent, struct device *dev,
				void *aux));

static void	fake_internal __P((void));

extern int	grfmv_probe __P((struct grf_softc *gp, nubus_slot *nu));
extern int	grfmv_init __P((struct grf_softc *gp));
extern int	grfmv_mode __P((struct grf_softc *gp, int cmd, void *arg));

extern int	grfiv_probe __P((struct grf_softc *gp, nubus_slot *ignore));
extern int	grfiv_init __P((struct grf_softc *gp));
extern int	grfiv_mode __P((struct grf_softc *gp, int cmd, void *arg));

struct cfdriver grfcd = {
	NULL, "grf", grf_match, grf_attach, DV_DULL,
	sizeof(struct grf_softc)
};

struct grfdev grfdev[] = {
/* DrSW             (*gd_probe)() (*gd_init)() (*gd_mode)()  gd_desc */
   NUBUS_DRSW_APPLE,  grfmv_probe,  grfmv_init,  grfmv_mode, "QD-compatible",
               0xFF,  grfiv_probe,  grfiv_init,  grfiv_mode, "Internal video",
};

static int ngrfdev=(sizeof(grfdev) / sizeof(grfdev[0]));

#ifdef DEBUG
static int grfdebug = 0xff;
#define GDB_DEVNO	0x01
#define GDB_MMAP	0x02
#define GDB_IOMAP	0x04
#define GDB_LOCK	0x08
#endif

static int
grf_match(parent, match, aux)
	struct	device *parent;
	void	*match, *aux;
{
	struct	grf_softc *sc = match;
	nubus_slot *nu = (nubus_slot *) aux;
	int	i, r;

	for (i = 0; i < ngrfdev; i++) {
		if ((r = (*grfdev[i].gd_probe)(sc, nu)) > 0) {
			sc->g_type = i;
			bcopy(aux, &sc->sc_slot, sizeof(nubus_slot));
			return r;
		}
	}
	return 0;
}

static void
grf_attach(parent, self, aux)
	struct device *parent, *self;
	void   *aux;
{
	struct grf_softc	*sc;

	sc = (struct grf_softc *) self;

	if ((*grfdev[sc->g_type].gd_init)(sc) == 0) {
		printf("\n");
		return;
	}
	sc->g_flags = GF_ALIVE;

	printf(": %d x %d ", sc->curr_mode.width, sc->curr_mode.height);

	if (sc->curr_mode.psize == 1)
		printf("monochrome");
	else
		printf("%d color", 1 << sc->curr_mode.psize);

	printf(" %s (%s) display\n",
		grfdev[sc->g_type].gd_desc, sc->card_name);
}

/*ARGSUSED*/
int
grfopen(dev, flag, mode, p)
	dev_t dev;
	int flag;
	int mode;
	struct proc *p;
{
	register struct grf_softc *gp;
	int unit;
	int error;

	unit = GRFUNIT(dev);
	gp = grfcd.cd_devs[unit];

	if (unit >= grfcd.cd_ndevs || (gp->g_flags & GF_ALIVE) == 0)
		return (ENXIO);

	if ((gp->g_flags & (GF_OPEN | GF_EXCLUDE)) == (GF_OPEN | GF_EXCLUDE))
		return (EBUSY);

	/*
	 * First open.
	 * XXX: always put in graphics mode.
	 */
	error = 0;
	if ((gp->g_flags & GF_OPEN) == 0) {
		gp->g_flags |= GF_OPEN;
		error = grfon(dev);
	}
	return (error);
}

/*ARGSUSED*/
grfclose(dev, flag, mode, p)
	dev_t dev;
	int flag;
	int mode;
	struct proc *p;
{
	register struct grf_softc *gp;

	gp = grfcd.cd_devs[GRFUNIT(dev)];

	(void) grfoff(dev);
	gp->g_flags &= GF_ALIVE;

	return (0);
}

/*ARGSUSED*/
grfioctl(dev, cmd, data, flag, p)
	dev_t dev;
	int cmd;
	caddr_t data;
	int flag;
	struct proc *p;
{
	register struct grf_softc *gp;
	int     error;
	int	unit = GRFUNIT(dev);

	gp = grfcd.cd_devs[unit];
	error = 0;

	switch (cmd) {
	case GRFIOCGINFO: /* XXX - This should go away as soon as X and	*/
			  /*       dt are fixed to use GRFIOC*MODE*	*/
		{ struct grfinfo *g;
		  g = (struct grfinfo *) data;
		  bzero(data, sizeof(struct grfinfo));
		  g->gd_id = gp->curr_mode.mode_id;
		  g->gd_fbaddr = gp->curr_mode.fbbase;
		  g->gd_fbsize = gp->curr_mode.fbsize;
		  g->gd_colors = 1 << (u_int32_t) gp->curr_mode.psize;
		  g->gd_planes = gp->curr_mode.psize;
		  g->gd_fbwidth = g->gd_dwidth = gp->curr_mode.width;
		  g->gd_fbheight = g->gd_dheight = gp->curr_mode.height;
		  g->gd_fbrowbytes = gp->curr_mode.rowbytes;
		}
		break;

	case GRFIOCON:
		error = grfon(dev);
		break;
	case GRFIOCOFF:
		error = grfoff(dev);
		break;
	case GRFIOCMAP:
		error = grfmap(dev, (caddr_t *) data, p);
		break;
	case GRFIOCUNMAP:
		error = grfunmap(dev, *(caddr_t *) data, p);
		break;

	case GRFIOCGETMODE:
		error = (*grfdev[gp->g_type].gd_mode)(gp, GM_CURRMODE, data);
		break;
	case GRFIOCSETMODE:
		error = (*grfdev[gp->g_type].gd_mode)(gp, GM_NEWMODE, data);
		break;
	case GRFIOCLISTMODES:
		error = (*grfdev[gp->g_type].gd_mode)(gp, GM_LISTMODES, data);
		break;

	default:
		error = EINVAL;
		break;
	}
	return (error);
}

/*ARGSUSED*/
grfselect(dev, rw, p)
	dev_t dev;
	int rw;
	struct proc *p;
{
	if (rw == FREAD)
		return (0);
	return (1);
}

/*ARGSUSED*/
grfmmap(dev, off, prot)
	dev_t dev;
	int off;
	int prot;
{
	return (grfaddr(grfcd.cd_devs[GRFUNIT(dev)], off));
}

int
grfon(dev)
	dev_t   dev;
{
	int     unit = GRFUNIT(dev);
	struct grf_softc *gp;

	gp = grfcd.cd_devs[unit];

	/*
	 * XXX: iteoff call relies on devices being in same order
	 * as ITEs and the fact that iteoff only uses the minor part
	 * of the dev arg.
	 */
	iteoff(unit, 3);

	return (*grfdev[gp->g_type].gd_mode) (gp, GM_GRFON, NULL);
}

int
grfoff(dev)
	dev_t   dev;
{
	int     unit = GRFUNIT(dev);
	struct grf_softc *gp;
	int     error;

	gp = grfcd.cd_devs[unit];

	(void) grfunmap(dev, (caddr_t) 0, curproc);

	error = (*grfdev[gp->g_type].gd_mode) (gp, GM_GRFOFF, NULL);

	/* XXX: see comment for iteoff above */
	iteon(unit, 2);

	return (error);
}

int
grfaddr(gp, off)
	struct grf_softc *gp;
	register int off;
{
	register struct grfmode *gm = &gp->curr_mode;

	if (off < gm->fbsize) {
		return (((u_int) gm->fbbase + off) >> PGSHIFT);
	}
	/* bogus */
	return (-1);
}

int
grfmap(dev, addrp, p)
	dev_t dev;
	caddr_t *addrp;
	struct proc *p;
{
	struct grf_softc *gp;
	struct specinfo si;
	struct vnode vn;
	int len, error;
	int flags;

	gp = grfcd.cd_devs[GRFUNIT(dev)];
#ifdef DEBUG
	if (grfdebug & GDB_MMAP)
		printf("grfmap(%d): addr %x\n", p->p_pid, *addrp);
#endif
	len = gp->curr_mode.fbsize;
	flags = MAP_SHARED;
	if (*addrp)
		flags |= MAP_FIXED;
	else {
		return 12;
		*addrp = (caddr_t) 0x1000000;	/* XXX */
	}
	vn.v_type = VCHR;	/* XXX */
	vn.v_specinfo = &si;	/* XXX */
	vn.v_rdev = dev;	/* XXX */

	error = vm_mmap(&p->p_vmspace->vm_map, (vm_offset_t *) addrp,
	    (vm_size_t) len, VM_PROT_ALL, VM_PROT_ALL, flags, (caddr_t) & vn,
	    0);

	/* Offset into page: */
	*addrp += (unsigned long) gp->curr_mode.fbbase & 0xfff;

	return (error);
}

int
grfunmap(dev, addr, p)
	dev_t   dev;
	caddr_t addr;
	struct proc *p;
{
	struct grf_softc *gp;
	vm_size_t size;
	int     rv;

	gp = grfcd.cd_devs[GRFUNIT(dev)];

#ifdef DEBUG
	if (grfdebug & GDB_MMAP)
		printf("grfunmap(%d): dev %x addr %x\n", p->p_pid, dev, addr);
#endif

	if (addr == 0)
		return (EINVAL);/* XXX: how do we deal with this? */

	size = round_page(gp->curr_mode.fbsize);

	rv = vm_deallocate(&p->p_vmspace->vm_map, (vm_offset_t) addr, size);

	return (rv == KERN_SUCCESS ? 0 : EINVAL);
}