NetBSD/sys/arch/mac68k/dev/grf.c

/*	$NetBSD: grf.c,v 1.20 1995/04/21 03:44:13 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	matchvideocard __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));
static int	grfprobe __P((struct nubus_hw *nu, int unit));
static int	macvideo_init __P((struct grf_softc *gp, struct nubus_hw *nu));
static int	macvideo_mode __P((struct grf_softc *gp, int cmd, void *arg));

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

struct grfdev grfdev[] = {
	GID_MAC, GRFMAC, macvideo_init, macvideo_mode, "MacVideo",
};

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

static int gNumGrfDev=0;

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

/*
 * Normal init routine called by configure() code
 */
grfprobe(nu, unit)
	struct nubus_hw *nu;
	int     unit;
{
	struct grf_softc *gp;

	gp = grfcd.cd_devs[unit];

	if ((gp->g_flags & GF_ALIVE) == 0 && !grfinit(nu, unit)) {
		printf("\n");
		return (0);
	}
	printf(": %d x %d ",
		gp->g_display.gd_dwidth, gp->g_display.gd_dheight);

	if (gp->g_display.gd_colors == 2)
		printf("monochrome");
	else
		printf("%d color", gp->g_display.gd_colors);

	printf(" %s (%s) display\n",
		grfdev[gp->g_type].gd_desc, nu->slot.name);

	gp->g_data = (void *) &nu->slot;

	return (1);
}

static int
matchvideocard(parent, cf, aux)
	struct device *parent;
	struct device *cf;
	void   *aux;
{
	struct nubus_hw *nu = (struct nubus_hw *) aux;

	return (nu->slot.type == NUBUS_VIDEO);
}

static void
grf_attach(parent, dev, aux)
	struct device *parent, *dev;
	void   *aux;
{
	struct nubus_hw *nu = (struct nubus_hw *) aux;

	grfprobe(nu, dev->dv_unit);
}

int
grfinit(nu, unit)
	struct nubus_hw *nu;
	int unit;
{
	struct grf_softc *gp;
	struct grfreg *gr;
	register struct grfdev *gd;

	gp = grfcd.cd_devs[unit];

	for (gd = grfdev; gd < &grfdev[ngrfdev]; gd++)
		/* if (gd->gd_hardid == gr->gr_id2) */
		break;
	if (gd < &grfdev[ngrfdev] && (*gd->gd_init) (gp, nu)) {
		gp->g_display.gd_id = gd->gd_softid;
		gp->g_type = gd - grfdev;
		gp->g_flags = GF_ALIVE;
		return (1);
	}
	return (0);
}

static void 
fake_internal()
{
	extern unsigned long int_video_start;
	struct grf_softc *gp;
	struct grfinfo *gi;
	struct grfterm *gt;
	struct grfmouse *gm;
	int i, j;

	if (int_video_start == 0) {
		return;
	}
	for (i = 0; i < NGRF; i++) {
		gp = grfcd.cd_devs[i];
		if ((gp->g_flags & GF_ALIVE) == 0) {
			break;
		}
	}

	if (i == NGRF) {
		printf("grf: not enough grf's to map internal video.\n");
		return;
	}
	gp->g_type = 0;
	gp->g_flags = GF_ALIVE;

	gi = &(gp->g_display);
	gi->gd_id = GRFMAC;
	gi->gd_regsize = 0;
	gi->gd_colors = 1;
	gi->gd_planes = 1;
	gi->gd_dwidth = gi->gd_fbwidth = 640;	/* XXX */
	gi->gd_dheight = gi->gd_fbheight = 480;	/* XXX */
	gi->gd_fbsize = gi->gd_dwidth * gi->gd_dheight;
	gi->gd_fbrowbytes = 80;	/* XXX Hack */
	gi->gd_fbaddr = (caddr_t) 0;
	gp->g_fbkva = gi->gd_fbaddr;
}

/*ARGSUSED*/
int
grfopen(dev, flag, mode, p)
	dev_t dev;
	int flag;
	int mode;
	struct proc *p;
{
	static int faked;	/* Whether we've faked internal video yet */
	register struct grf_softc *gp;
	int unit;
	int error;

	unit = GRFUNIT(dev);
	gp = grfcd.cd_devs[unit];
	if (!faked) {
		fake_internal();
		faked = 1;
	}

	if (unit >= NGRF || (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);
	(void) grfunlock(gp);
	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;

	gp = grfcd.cd_devs[GRFUNIT(dev)];
	error = 0;

	switch (cmd) {
	case OGRFIOCGINFO:
		bcopy((caddr_t) & gp->g_display, data, sizeof(struct ogrfinfo));
		break;
	case GRFIOCGINFO:
		bcopy((caddr_t) & gp->g_display, data, sizeof(struct grfinfo));
		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;
	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);
}

int
grflock(gp, block)
	register struct grf_softc *gp;
	int block;
{
	extern char devioc[];
	struct proc *p = curproc;	/* XXX */
	int error;

#ifdef DEBUG
	if (grfdebug & GDB_LOCK)
		printf("grflock(%d): dev %x flags %x lockpid %x\n",
		    p->p_pid, gp->sc_dev.dv_unit, gp->g_flags,
		    gp->g_lockp ? gp->g_lockp->p_pid : -1);
#endif
	if (gp->g_lockp) {
		if (gp->g_lockp == p)
			return (EBUSY);
		if (!block)
			return (EAGAIN);
		do {
			gp->g_flags |= GF_WANTED;
			if (error = tsleep((caddr_t) & gp->g_flags,
					   (PZERO + 1) | PCATCH, devioc, 0))
				return (error);
		} while (gp->g_lockp);
	}
	gp->g_lockp = p;
	return (0);
}

int
grfunlock(gp)
	register struct grf_softc *gp;
{
#ifdef DEBUG
	if (grfdebug & GDB_LOCK)
		printf("grfunlock(%d): dev %x flags %x lockpid %d\n",
		    curproc->p_pid, gp->sc_dev.dv_unit, gp->g_flags,
		    gp->g_lockp ? gp->g_lockp->p_pid : -1);
#endif
	if (gp->g_lockp != curproc)
		return (EBUSY);

	if (gp->g_flags & GF_WANTED) {
		wakeup((caddr_t) & gp->g_flags);
		gp->g_flags &= ~GF_WANTED;
	}
	gp->g_lockp = NULL;

	return (0);
}

/*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, (dev & GRFOVDEV) ? GM_GRFOVON : GM_GRFON));
}

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, (dev & GRFOVDEV) ? GM_GRFOVOFF : GM_GRFOFF);
	/* XXX: see comment for iteoff above */
	iteon(unit, 2);
	return (error);
}

int
grfaddr(gp, off)
	struct grf_softc *gp;
	register int off;
{
	register struct grfinfo *gi = &gp->g_display;

	/* control registers */
	if (off >= 0 && off < gi->gd_regsize)
		return (((u_int) gi->gd_regaddr + off) >> PGSHIFT);

	/* frame buffer */
	if (off >= gi->gd_regsize && off < gi->gd_regsize + gi->gd_fbsize) {
		off -= gi->gd_regsize;
		return (((u_int) gi->gd_fbaddr + off) >> PGSHIFT);
	}
	/* bogus */
	return (-1);
}

int
grfmap(dev, addrp, p)
	dev_t dev;
	caddr_t *addrp;
	struct proc *p;
{
	struct grf_softc *gp;
	int     len, error;
	struct vnode vn;
	struct specinfo si;
	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->g_display.gd_regsize + gp->g_display.gd_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->g_display.gd_fbaddr & 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->g_display.gd_regsize + gp->g_display.gd_fbsize);
	rv = vm_deallocate(&p->p_vmspace->vm_map, (vm_offset_t) addr, size);
	return (rv == KERN_SUCCESS ? 0 : EINVAL);
}

static char zero = 0;

static void
macvideo_intr(unit, slot)
	int unit, slot;
{
	struct grf_softc *gp;

	((char *) (0xf0000000 | ((long) slot << 24)))[0xa0000] = zero;
}

static int
macvideo_init(gp, nu)
	struct grf_softc *gp;
	struct nubus_hw *nu;
{
	struct grfinfo *gi;
	struct imagedata *image;
	struct imagedata imageSpace;
	int i = 0;

	/*
	 * find out which nubus slot this guy is in, then get the video params
	 */
	image = (struct imagedata *) NUBUS_GetImageData(&(nu->slot), &imageSpace);

	gi = &(gp->g_display);
	gi->gd_regsize = 0;
	gi->gd_colors = 1;
	gi->gd_planes = 1;
	gi->gd_dwidth = gi->gd_fbwidth = image->right;
	gi->gd_dheight = gi->gd_fbheight = image->bottom;
	gi->gd_fbsize = image->rowbytes * image->bottom;
	gi->gd_fbrowbytes = image->rowbytes;
	gi->gd_fbaddr = (caddr_t) ((u_long) image->offset + (u_long) nu->addr);
	gp->g_fbkva = gi->gd_fbaddr;

	add_nubus_intr((unsigned int) nu->addr & 0xFF000000, macvideo_intr,
	    (gp->sc_dev.dv_unit));

	gNumGrfDev++;

	return 1;
}

static int
macvideo_mode(gp, cmd, arg)
	struct grf_softc *gp;
	int cmd;
	void *arg;
{
	return 0;
}