xcfb.c

早期freebsd实现

/*-
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ralph Campbell and Rick Macklem.
 *
 * 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.
 *
 *	@(#)xcfb.c	8.1 (Berkeley) 6/10/93
 */

/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  [e-mail]
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */
/*
 *  devGraphics.c --
 *
 *     	This file contains machine-dependent routines for the graphics device.
 *
 *	Copyright (C) 1989 Digital Equipment Corporation.
 *	Permission to use, copy, modify, and distribute this software and
 *	its documentation for any purpose and without fee is hereby granted,
 *	provided that the above copyright notice appears in all copies.  
 *	Digital Equipment Corporation makes no representations about the
 *	suitability of this software for any purpose.  It is provided "as is"
 *	without express or implied warranty.
 *
 * from: $Header: /sprite/src/kernel/dev/ds3100.md/RCS/devGraphics.c,
 *	v 9.2 90/02/13 22:16:24 shirriff Exp $ SPRITE (DECWRL)";
 */

#include <xcfb.h>
#include <dtop.h>
#if NXCFB > 0
#if NDTOP == 0
xcfb needs dtop device
#else

#include <sys/param.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <sys/errno.h>
#include <sys/proc.h>
#include <sys/mman.h>

#include <vm/vm.h>

#include <machine/machConst.h>
#include <machine/pmioctl.h>

#include <pmax/pmax/maxine.h>
#include <pmax/pmax/cons.h>
#include <pmax/pmax/pmaxtype.h>

#include <pmax/dev/device.h>
#include <pmax/dev/xcfbreg.h>
#include <pmax/dev/dtopreg.h>
#include <pmax/dev/fbreg.h>

/*
 * These need to be mapped into user space.
 */
struct fbuaccess xcfbu;
struct pmax_fb xcfbfb;

/*
 * Forward references.
 */
static void xcfbScreenInit();
static void xcfbLoadCursor();
static void xcfbRestoreCursorColor();
static void xcfbCursorColor();
void xcfbPosCursor();
static void xcfbInitColorMap();
static void xcfbLoadColorMap();
static u_int ims332_read_register();
static void ims332_write_register();
static void ims332_load_colormap_entry();
static void ims332_video_off();
static void ims332_video_on();

void xcfbKbdEvent(), xcfbMouseEvent(), xcfbMouseButtons();
extern void dtopKBDPutc();
extern void (*dtopDivertXInput)();
extern void (*dtopMouseEvent)();
extern void (*dtopMouseButtons)();
extern int pmax_boardtype;
extern u_short defCursor[32];
extern struct consdev cn_tab;

int	xcfbprobe();
struct	driver xcfbdriver = {
	"xcfb", xcfbprobe, 0, 0,
};

/*
 * Test to see if device is present.
 * Return true if found and initialized ok.
 */
/*ARGSUSED*/
xcfbprobe(cp)
	register struct pmax_ctlr *cp;
{
	register struct pmax_fb *fp = &xcfbfb;

	if (pmax_boardtype != DS_MAXINE)
		return (0);
	if (!fp->initialized && !xcfbinit())
		return (0);
	printf("xcfb0 (color display)\n");
	return (1);
}

/*ARGSUSED*/
xcfbopen(dev, flag)
	dev_t dev;
	int flag;
{
	register struct pmax_fb *fp = &xcfbfb;
	int s;

	if (!fp->initialized)
		return (ENXIO);
	if (fp->GraphicsOpen)
		return (EBUSY);

	fp->GraphicsOpen = 1;
	xcfbInitColorMap();
	/*
	 * Set up event queue for later
	 */
	fp->fbu->scrInfo.qe.eSize = PM_MAXEVQ;
	fp->fbu->scrInfo.qe.eHead = fp->fbu->scrInfo.qe.eTail = 0;
	fp->fbu->scrInfo.qe.tcSize = MOTION_BUFFER_SIZE;
	fp->fbu->scrInfo.qe.tcNext = 0;
	fp->fbu->scrInfo.qe.timestamp_ms = TO_MS(time);
	s = spltty();
	dtopDivertXInput = xcfbKbdEvent;
	dtopMouseEvent = xcfbMouseEvent;
	dtopMouseButtons = xcfbMouseButtons;
	splx(s);
	return (0);
}

/*ARGSUSED*/
xcfbclose(dev, flag)
	dev_t dev;
	int flag;
{
	register struct pmax_fb *fp = &xcfbfb;
	int s;

	if (!fp->GraphicsOpen)
		return (EBADF);

	fp->GraphicsOpen = 0;
	xcfbInitColorMap();
	s = spltty();
	dtopDivertXInput = (void (*)())0;
	dtopMouseEvent = (void (*)())0;
	dtopMouseButtons = (void (*)())0;
	splx(s);
	xcfbScreenInit();
	bzero((caddr_t)fp->fr_addr, 1024 * 768);
	xcfbPosCursor(fp->col * 8, fp->row * 15);
	return (0);
}

/*ARGSUSED*/
xcfbioctl(dev, cmd, data, flag, p)
	dev_t dev;
	caddr_t data;
	struct proc *p;
{
	register struct pmax_fb *fp = &xcfbfb;
	int s;

	switch (cmd) {
	case QIOCGINFO:
		return (fbmmap(fp, dev, data, p));

	case QIOCPMSTATE:
		/*
		 * Set mouse state.
		 */
		fp->fbu->scrInfo.mouse = *(pmCursor *)data;
		xcfbPosCursor(fp->fbu->scrInfo.mouse.x, fp->fbu->scrInfo.mouse.y);
		break;

	case QIOCINIT:
		/*
		 * Initialize the screen.
		 */
		xcfbScreenInit();
		break;

	case QIOCKPCMD:
	    {
		pmKpCmd *kpCmdPtr;
		unsigned char *cp;

		kpCmdPtr = (pmKpCmd *)data;
		if (kpCmdPtr->nbytes == 0)
			kpCmdPtr->cmd |= 0x80;
		if (!fp->GraphicsOpen)
			kpCmdPtr->cmd |= 1;
		(*fp->KBDPutc)(fp->kbddev, (int)kpCmdPtr->cmd);
		cp = &kpCmdPtr->par[0];
		for (; kpCmdPtr->nbytes > 0; cp++, kpCmdPtr->nbytes--) {
			if (kpCmdPtr->nbytes == 1)
				*cp |= 0x80;
			(*fp->KBDPutc)(fp->kbddev, (int)*cp);
		}
		break;
	    }

	case QIOCADDR:
		*(PM_Info **)data = &fp->fbu->scrInfo;
		break;

	case QIOWCURSOR:
		xcfbLoadCursor((unsigned short *)data);
		break;

	case QIOWCURSORCOLOR:
		xcfbCursorColor((unsigned int *)data);
		break;

	case QIOSETCMAP:
		xcfbLoadColorMap((ColorMap *)data);
		break;

	case QIOKERNLOOP:
		s = spltty();
		dtopDivertXInput = xcfbKbdEvent;
		dtopMouseEvent = xcfbMouseEvent;
		dtopMouseButtons = xcfbMouseButtons;
		splx(s);
		break;

	case QIOKERNUNLOOP:
		s = spltty();
		dtopDivertXInput = (void (*)())0;
		dtopMouseEvent = (void (*)())0;
		dtopMouseButtons = (void (*)())0;
		splx(s);
		break;

	case QIOVIDEOON:
		xcfbRestoreCursorColor();
		ims332_video_on();
		break;

	case QIOVIDEOOFF:
		ims332_video_off();
		break;

	default:
		printf("xcfb0: Unknown ioctl command %x\n", cmd);
		return (EINVAL);
	}
	return (0);
}

/*
 * Return the physical page number that corresponds to byte offset 'off'.
 */
/*ARGSUSED*/
xcfbmap(dev, off, prot)
	dev_t dev;
{
	int len;

	len = pmax_round_page(((vm_offset_t)&xcfbu & PGOFSET) + sizeof(xcfbu));
	if (off < len)
		return pmax_btop(MACH_CACHED_TO_PHYS(&xcfbu) + off);
	off -= len;
	if (off >= xcfbfb.fr_size)
		return (-1);
	return pmax_btop(MACH_UNCACHED_TO_PHYS(xcfbfb.fr_addr) + off);
}

xcfbselect(dev, flag, p)
	dev_t dev;
	int flag;
	struct proc *p;
{
	struct pmax_fb *fp = &xcfbfb;

	switch (flag) {
	case FREAD:
		if (fp->fbu->scrInfo.qe.eHead != fp->fbu->scrInfo.qe.eTail)
			return (1);
		selrecord(p, &fp->selp);
		break;
	}

	return (0);
}

static u_char	cursor_RGB[6];	/* cursor color 2 & 3 */

/*
 *	Routines for the Inmos IMS-G332 Colour video controller
 * 	Author: Alessandro Forin, Carnegie Mellon University
 */
static u_int
ims332_read_register(regno)
{
	register u_char *regs = (u_char *)IMS332_ADDRESS;
	unsigned char *rptr;
	register u_int val, v1;

	/* spec sez: */
	rptr = regs + 0x80000 + (regno << 4);
	val = *((volatile u_short *) rptr );
	v1  = *((volatile u_short *) regs );

	return (val & 0xffff) | ((v1 & 0xff00) << 8);
}

static void
ims332_write_register(regno, val)
	register unsigned int val;
{
	register u_char *regs = (u_char *)IMS332_ADDRESS;
	u_char *wptr;