xref: /src/sys/arch/sun3/dev/cg2.c

/*	$NetBSD: cg2.c,v 1.4 1995/04/10 07:05:57 mycroft Exp $	*/

/*
 * 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. 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: @(#)cgthree.c	8.2 (Berkeley) 10/30/93
 */

/*
 * color display (cg2) 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/device.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/tty.h>

#include <vm/vm.h>

#include <machine/fbio.h>
#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <machine/cg2reg.h>

#include "fbvar.h"

#define	CMSIZE 256

/* offset to and size of mapped part of frame buffer */
#define PLANEMAP_SIZE		0x100000
#define PIXELMAP_SIZE		0x100000
#define ROWOPMAP_SIZE		0x100000

#define	CTLREGS_OFF 		0x300000
#define	CTLREGS_SIZE		 0x10600

#define	CG2_MAPPED_OFFSET	(PLANEMAP_SIZE + PIXELMAP_SIZE)
#define	CG2_MAPPED_SIZE 	(CTLREGS_OFF + CTLREGS_SIZE)

/* per-display variables */
struct cg2_softc {
	struct	device sc_dev;		/* base device */
	struct	fbdevice sc_fb;		/* frame buffer device */
	int 	sc_phys;		/* display RAM (phys addr) */
	int 	sc_pmtype;		/* pmap type bits */
	struct	cg2fb *sc_ctlreg;	/* control registers */
};

/* autoconfiguration driver */
static void	cg2attach __P((struct device *, struct device *, void *));
static int	cg2match __P((struct device *, void *, void *));

struct cfdriver cgtwocd = {
	NULL, "cgtwo", cg2match, cg2attach,
	DV_DULL, sizeof(struct cg2_softc) };

/* frame buffer generic driver */
int cg2open(), cg2close(), cg2mmap();

static int  cg2gattr __P((struct fbdevice *, struct fbgattr *));
static int  cg2gvideo __P((struct fbdevice *, int *));
static int	cg2svideo __P((struct fbdevice *, int *));
static int	cg2getcmap __P((struct fbdevice *, struct fbcmap *));
static int	cg2putcmap __P((struct fbdevice *, struct fbcmap *));

static struct fbdriver cg2fbdriver = {
	cg2open, cg2close, cg2mmap, cg2gattr,
	cg2gvideo, cg2svideo,
	cg2getcmap, cg2putcmap };

static void cg2loadcmap __P((struct cg2_softc *, int, int));
static int cg2intr __P((void*));

/*
 * Match a cg2.
 */
static int
cg2match(parent, vcf, args)
	struct device *parent;
	void *vcf, *args;
{
	struct confargs *ca = args;
	int x;

	if (ca->ca_paddr == -1)
		return (0);

	if (ca->ca_bustype != BUS_VME16)
		return (0);

	x = bus_peek(ca->ca_bustype, ca->ca_paddr + CTLREGS_OFF, 1);
	if (x == -1)
		return (0);

	/* XXX */
	/* printf("cg2: id=0x%x\n", x); */

	return (1);
}

/*
 * Attach a display.  We need to notice if it is the console, too.
 */
static void
cg2attach(parent, self, args)
	struct device *parent, *self;
	void *args;
{
	struct cg2_softc *sc = (struct cg2_softc *)self;
	struct fbdevice *fb = &sc->sc_fb;
	struct confargs *ca = args;
	struct fbtype *fbt;
	int i, ramsize, pa;

	sc->sc_phys = ca->ca_paddr;
	sc->sc_pmtype = PMAP_NC | PMAP_VME16;

	sc->sc_ctlreg = (struct cg2fb *) bus_mapin(ca->ca_bustype,
			ca->ca_paddr + CTLREGS_OFF, CTLREGS_SIZE);

	isr_add_vectored(cg2intr, (void*)sc,
					 ca->ca_intpri, ca->ca_intvec);

	/*
	 * XXX - Initialize?  Determine type?
	 */
	sc->sc_ctlreg->intrptvec.reg = ca->ca_intvec;
	sc->sc_ctlreg->status.word = 1;

	fb->fb_driver = &cg2fbdriver;
	fb->fb_private = sc;
	fb->fb_name = sc->sc_dev.dv_xname;

	fbt = &fb->fb_fbtype;
	fbt->fb_type = FBTYPE_SUN2COLOR;
	fbt->fb_depth = 8;
	fbt->fb_cmsize = CMSIZE;

	fbt->fb_width = 1152;
	fbt->fb_height = 900;
	fbt->fb_size = CG2_MAPPED_SIZE;

	printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height);
	fb_attach(fb, 2);
}

int
cg2open(dev, flags, mode, p)
	dev_t dev;
	int flags, mode;
	struct proc *p;
{
	int unit = minor(dev);

	if (unit >= cgtwocd.cd_ndevs || cgtwocd.cd_devs[unit] == NULL)
		return (ENXIO);
	return (0);
}

int
cg2close(dev, flags, mode, p)
	dev_t dev;
	int flags, mode;
	struct proc *p;
{

	return (0);
}

int
cg2ioctl(dev, cmd, data, flags, p)
	dev_t dev;
	u_long cmd;
	caddr_t data;
	int flags;
	struct proc *p;
{
	struct cg2_softc *sc = cgtwocd.cd_devs[minor(dev)];

	return (fbioctlfb(&sc->sc_fb, cmd, data));
}

/*
 * Return the address that would map the given device at the given
 * offset, allowing for the given protection, or return -1 for error.
 */
int
cg2mmap(dev, off, prot)
	dev_t dev;
	int off, prot;
{
	struct cg2_softc *sc = cgtwocd.cd_devs[minor(dev)];
	int realoff;

	if (off & PGOFSET)
		panic("cg2mmap");

	if ((unsigned)off >= CG2_MAPPED_SIZE)
		return (-1);

	/*
	 * I turned on PMAP_NC here to disable the cache as I was
	 * getting horribly broken behaviour with it on.
	 */
	return ((sc->sc_phys + off) | sc->sc_pmtype);
}

/*
 * Internal ioctl functions.
 */

/* FBIOGATTR: */
static int  cg2gattr(fb, fba)
	struct fbdevice *fb;
	struct fbgattr *fba;
{

	fba->real_type = fb->fb_fbtype.fb_type;
	fba->owner = 0;		/* XXX - TIOCCONS stuff? */
	fba->fbtype = fb->fb_fbtype;
	fba->sattr.flags = 0;
	fba->sattr.emu_type = fb->fb_fbtype.fb_type;
	fba->sattr.dev_specific[0] = -1;
	fba->emu_types[0] = fb->fb_fbtype.fb_type;
	fba->emu_types[1] = -1;
	return (0);
}

/* FBIOGVIDEO: */
static int  cg2gvideo(fb, on)
	struct fbdevice *fb;
	int *on;
{
	struct cg2_softc *sc = fb->fb_private;

	*on = sc->sc_ctlreg->status.reg.video_enab;
	return (0);
}

/* FBIOSVIDEO: */
static int cg2svideo(fb, on)
	struct fbdevice *fb;
	int *on;
{
	struct cg2_softc *sc = fb->fb_private;

	sc->sc_ctlreg->status.reg.video_enab = (*on) & 1;

	return (0);
}

/* FBIOGETCMAP: */
static int cg2getcmap(fb, cmap)
	struct fbdevice *fb;
	struct fbcmap *cmap;
{
	struct cg2_softc *sc = fb->fb_private;
	u_char red[CMSIZE], green[CMSIZE], blue[CMSIZE];
	int error, start, count, ecount;
	register u_int i;
	register u_short *p;

	start = cmap->index;
	count = cmap->count;
	ecount = start + count;
	if (start >= CMSIZE || ecount > CMSIZE)
		return (EINVAL);

	/* XXX - Wait for retrace? */

	/* Copy hardware to local arrays. */
	p = &sc->sc_ctlreg->redmap[start];
	for (i = start; i < ecount; i++)
		red[i] = *p++;
	p = &sc->sc_ctlreg->greenmap[start];
	for (i = start; i < ecount; i++)
		green[i] = *p++;
	p = &sc->sc_ctlreg->bluemap[start];
	for (i = start; i < ecount; i++)
		blue[i] = *p++;

	/* Copy local arrays to user space. */
	if ((error = copyout(red + start, cmap->red, count)) != 0)
		return (error);
	if ((error = copyout(green + start, cmap->green, count)) != 0)
		return (error);
	if ((error = copyout(blue + start, cmap->blue, count)) != 0)
		return (error);

	return (0);
}

/* FBIOPUTCMAP: */
static int cg2putcmap(fb, cmap)
	struct fbdevice *fb;
	struct fbcmap *cmap;
{
	struct cg2_softc *sc = fb->fb_private;
	u_char red[CMSIZE], green[CMSIZE], blue[CMSIZE];
	int error, start, count, ecount;
	register u_int i;
	register u_short *p;

	start = cmap->index;
	count = cmap->count;
	ecount = start + count;
	if (start >= CMSIZE || ecount > CMSIZE)
		return (EINVAL);

	/* Copy from user space to local arrays. */
	if ((error = copyin(cmap->red, red + start, count)) != 0)
		return (error);
	if ((error = copyin(cmap->green, green + start, count)) != 0)
		return (error);
	if ((error = copyin(cmap->blue, blue + start, count)) != 0)
		return (error);

	/* XXX - Wait for retrace? */

	/* Copy from local arrays to hardware. */
	p = &sc->sc_ctlreg->redmap[start];
	for (i = start; i < ecount; i++)
		*p++ = red[i];
	p = &sc->sc_ctlreg->greenmap[start];
	for (i = start; i < ecount; i++)
		*p++ = green[i];
	p = &sc->sc_ctlreg->bluemap[start];
	for (i = start; i < ecount; i++)
		*p++ = blue[i];

	return (0);

}

static int
cg2intr(vsc)
	void *vsc;
{
	struct cg2_softc *sc = vsc;

	/* XXX - Just disable interrupts for now. */
	sc->sc_ctlreg->status.reg.inten = 0;

	printf("cg2intr\n");
	return (1);
}