cgsix.c

早期freebsd实现

/*
 * Copyright (c) 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.
 *
 *	@(#)cgsix.c	8.4 (Berkeley) 1/21/94
 *
 * from: $Header: cgsix.c,v 1.2 93/10/18 00:01:51 torek Exp $
 */

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

#ifdef DEBUG
#include <sys/proc.h>
#include <sys/syslog.h>
#endif

#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <machine/fbvar.h>

#include <sparc/sbus/btreg.h>
#include <sparc/sbus/btvar.h>
#include <sparc/sbus/cgsixreg.h>
#include <sparc/sbus/sbusvar.h>

union cursor_cmap {		/* colormap, like bt_cmap, but tiny */
	u_char	cm_map[2][3];	/* 2 R/G/B entries */
	u_int	cm_chip[2];	/* 2 chip equivalents */
};

struct cg6_cursor {		/* cg6 hardware cursor status */
	short	cc_enable;		/* cursor is enabled */
	struct	fbcurpos cc_pos;	/* position */
	struct	fbcurpos cc_hot;	/* hot-spot */
	struct	fbcurpos cc_size;	/* size of mask & image fields */
	u_int	cc_bits[2][32];		/* space for mask & image bits */
	union	cursor_cmap cc_color;	/* cursor colormap */
};

/* per-display variables */
struct cgsix_softc {
	struct	device sc_dev;		/* base device */
	struct	sbusdev sc_sd;		/* sbus device */
	struct	fbdevice sc_fb;		/* frame buffer device */
	volatile struct cg6_layout *sc_physadr;	/* phys addr of h/w */
	volatile struct bt_regs *sc_bt;		/* Brooktree registers */
	volatile int *sc_fhc;			/* FHC register */
	volatile struct cg6_thc *sc_thc;	/* THC registers */
	volatile struct cg6_tec_xxx *sc_tec;	/* TEC registers */
	short	sc_fhcrev;		/* hardware rev */
	short	sc_blanked;		/* true if blanked */
	struct	cg6_cursor sc_cursor;	/* software cursor info */
	union	bt_cmap sc_cmap;	/* Brooktree color map */
};

/* autoconfiguration driver */
static void	cgsixattach(struct device *, struct device *, void *);
struct cfdriver cgsixcd =
    { NULL, "cgsix", matchbyname, cgsixattach,
      DV_DULL, sizeof(struct cgsix_softc) };

/* frame buffer generic driver */
static void	cg6_unblank(struct device *);
static struct fbdriver cg6_fbdriver = { cg6_unblank };

/*
 * Unlike the bw2 and cg3 drivers, we do not need to provide an rconsole
 * interface, as the cg6 is fast enough.
 */

extern int fbnode;

#define	CGSIX_MAJOR	67		/* XXX */

static void cg6_reset __P((struct cgsix_softc *));
static void cg6_loadcmap __P((struct cgsix_softc *, int, int));
static void cg6_loadomap __P((struct cgsix_softc *));
static void cg6_setcursor __P((struct cgsix_softc *));/* set position */
static void cg6_loadcursor __P((struct cgsix_softc *));/* set shape */

/*
 * Attach a display.
 */
void
cgsixattach(parent, self, args)
	struct device *parent, *self;
	void *args;
{
	register struct cgsix_softc *sc = (struct cgsix_softc *)self;
	register struct sbus_attach_args *sa = args;
	register int node = sa->sa_ra.ra_node, ramsize, i;
	register volatile struct bt_regs *bt;
	register volatile struct cg6_layout *p;

	sc->sc_fb.fb_major = CGSIX_MAJOR;	/* XXX to be removed */

	sc->sc_fb.fb_driver = &cg6_fbdriver;
	sc->sc_fb.fb_device = &sc->sc_dev;
	sc->sc_fb.fb_type.fb_type = FBTYPE_SUNFAST_COLOR;
	sc->sc_fb.fb_type.fb_width = getpropint(node, "width", 1152);
	sc->sc_fb.fb_type.fb_height = getpropint(node, "height", 900);
	sc->sc_fb.fb_linebytes = getpropint(node, "linebytes", 1152);
	ramsize = sc->sc_fb.fb_type.fb_height * sc->sc_fb.fb_linebytes;
	sc->sc_fb.fb_type.fb_depth = 8;
	sc->sc_fb.fb_type.fb_cmsize = 256;
	sc->sc_fb.fb_type.fb_size = ramsize;
	printf(": %s, %d x %d", getpropstring(node, "model"),
	    sc->sc_fb.fb_type.fb_width, sc->sc_fb.fb_type.fb_height);

	/*
	 * Dunno what the PROM has mapped, though obviously it must have
	 * the video RAM mapped.  Just map what we care about for ourselves
	 * (the FHC, THC, and Brooktree registers).
	 */
	sc->sc_physadr = p = (struct cg6_layout *)sa->sa_ra.ra_paddr;
	sc->sc_bt = bt = (volatile struct bt_regs *)
	    mapiodev((caddr_t)&p->cg6_bt_un.un_btregs, sizeof *sc->sc_bt);
	sc->sc_fhc = (volatile int *)
	    mapiodev((caddr_t)&p->cg6_fhc_un.un_fhc, sizeof *sc->sc_fhc);
	sc->sc_thc = (volatile struct cg6_thc *)
	    mapiodev((caddr_t)&p->cg6_thc_un.un_thc, sizeof *sc->sc_thc);
	sc->sc_tec = (volatile struct cg6_tec_xxx *)
	    mapiodev((caddr_t)&p->cg6_tec_un.un_tec, sizeof *sc->sc_tec);

	sc->sc_fhcrev = (*sc->sc_fhc >> FHC_REV_SHIFT) &
	    (FHC_REV_MASK >> FHC_REV_SHIFT);
	printf(", rev %d", sc->sc_fhcrev);

	/* reset cursor & frame buffer controls */
	cg6_reset(sc);

	/* grab initial (current) color map (DOES THIS WORK?) */
	bt->bt_addr = 0;
	for (i = 0; i < 256 * 3; i++)
		((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24;

	/* enable video */
	sc->sc_thc->thc_misc |= THC_MISC_VIDEN;

	printf("\n");
	sbus_establish(&sc->sc_sd, &sc->sc_dev);
	if (node == fbnode)
		fb_attach(&sc->sc_fb);
}

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

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

int
cgsixclose(dev, flags, mode, p)
	dev_t dev;
	int flags, mode;
	struct proc *p;
{
	struct cgsix_softc *sc = cgsixcd.cd_devs[minor(dev)];

	cg6_reset(sc);
	return (0);
}

int
cgsixioctl(dev, cmd, data, flags, p)
	dev_t dev;
	int cmd;
	register caddr_t data;
	int flags;
	struct proc *p;
{
	register struct cgsix_softc *sc = cgsixcd.cd_devs[minor(dev)];
	u_int count;
	int i, v, error;
	union cursor_cmap tcm;

	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:
		return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256));

	case FBIOPUTCMAP:
		/* copy to software map */
#define	p ((struct fbcmap *)data)
		error = bt_putcmap(p, &sc->sc_cmap, 256);
		if (error)
			return (error);
		/* now blast them into the chip */
		/* XXX should use retrace interrupt */
		cg6_loadcmap(sc, p->index, p->count);
#undef p
		break;

	case FBIOGVIDEO:
		*(int *)data = sc->sc_blanked;
		break;

	case FBIOSVIDEO:
		if (*(int *)data)
			cg6_unblank(&sc->sc_dev);
		else if (!sc->sc_blanked) {
			sc->sc_blanked = 1;
			sc->sc_thc->thc_misc &= ~THC_MISC_VIDEN;
		}
		break;

/* these are for both FBIOSCURSOR and FBIOGCURSOR */
#define p ((struct fbcursor *)data)
#define cc (&sc->sc_cursor)

	case FBIOGCURSOR:
		/* do not quite want everything here... */
		p->set = FB_CUR_SETALL;	/* close enough, anyway */
		p->enable = cc->cc_enable;
		p->pos = cc->cc_pos;
		p->hot = cc->cc_hot;
		p->size = cc->cc_size;

		/* begin ugh ... can we lose some of this crap?? */
		if (p->image != NULL) {
			count = cc->cc_size.y * 32 / NBBY;
			error = copyout((caddr_t)cc->cc_bits[1],
			    (caddr_t)p->image, count);
			if (error)
				return (error);
			error = copyout((caddr_t)cc->cc_bits[0],
			    (caddr_t)p->mask, count);
			if (error)
				return (error);
		}
		if (p->cmap.red != NULL) {
			error = bt_getcmap(&p->cmap,
			    (union bt_cmap *)&cc->cc_color, 2);