fb.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
 * Sony Corp. and Kazumasa Utashiro of Software Research Associates, Inc.
 *
 * 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: $Hdr: fb.c,v 4.300 91/06/27 20:43:06 root Rel41 $ SONY
 *
 *	@(#)fb.c	8.1 (Berkeley) 6/11/93
 */

#include "fb.h"
#if NFB > 0
/*
 * Frame buffer driver
 */

#include <sys/types.h>
#include <machine/pte.h>
#include <machine/cpu.h>

#include <sys/param.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/buf.h>
#include <vm/vm.h>
#include <sys/systm.h>
#include <sys/map.h>
#include <sys/uio.h>
#include <sys/kernel.h>

#include <news3400/iop/framebuf.h>
#include <news3400/iop/fbreg.h>
#include <news3400/iodev/ioptohb.h>

#ifdef CPU_SINGLE
#include <news3400/hbdev/hbvar.h>

#define ipc_phys(x)	(caddr_t)((int)(x))
#define ipc_log(x)	(caddr_t)((int)(x) | 0x80000000)

#define iop_driver	hb_driver
#define iop_device	hb_device

extern rop_xint();
#else /* CPU_SINGLE */
#include <news3400/iop/iopvar.h>

#ifdef IPC_MRX
#include "../ipc/newsipc.h"

#ifdef mips
#define ipc_phys(x)	K0_TT0(x)
#define ipc_log(x)	TT0_K0(x)
#else
#define	ipc_phys(x)	(caddr_t)((int)(x) & ~0x80000000)
#define	ipc_log(x)	(caddr_t)((int)(x) | 0x80000000)
#endif

static int port_fb, port_fb_iop;
#endif /* IPC_MRX */
#endif /* CPU_SINGLE */

#define FB_USED		1
#define VIDEO_USED	2

/*
 * driver definition
 */
int fbprobe(), fbattach();

struct iop_device *fbinfo[NFB];
struct iop_driver fbdriver =
#ifdef CPU_SINGLE
	{ fbprobe, 0, fbattach, 0, 0, "fb", fbinfo, "fbc", 0, 0 };
#else
	{ fbprobe, 0, fbattach, 0, "fb", fbinfo };
#endif

/* static */
static struct fb_softc fb_softc[NFB];
static struct fbreg	fbreg[NFB];
static int fbstate;
static struct fbreg	*last_fb;

static char *devname[] = {
/* 0*/	"",
/* 1*/	"NWB-512",
/* 2*/	"NWB-225",
/* 3*/	"POP-MONO",
/* 4*/	"POP-COLOR",
/* 5*/	"NWB-514",
/* 6*/	"NWB-251",
/* 7*/	"LCD-MONO",
/* 8*/	"LDC-COLOR",
/* 9*/	"NWB-518",
/*10*/	"NWB-252",
/*11*/	"NWB-253",
/*12*/	"NWB-254",
/*13*/	"NWB-255",
/*14*/	"SLB-101",
/*15*/	"NWB-256",
/*16*/	"NWB-257",
};

static void	fblock(), fbunlock(), fbreset();
static int	fbinit();

#ifdef CPU_DOUBLE
#ifdef USE_RAW_INTR

#include "../mrx/h/ipc.h"

#ifdef mips
# define	FB_ADDR		&IPC_ARG(&ipc_block, ARG_CPU, 4)
#else
# define	FB_ADDR		&IPC_ARG(&ipc_block, ARG_CPU0, 4)
# define	volatile
#endif

typedef struct fbreg *fbregp;
int fb_waiting;

Xfb_intr(chan, arg)
	int chan;
	int arg;
{

	intrcnt[INTR_BITMAP]++;
	if (fb_waiting) {
		fb_waiting = 0;
		wakeup((caddr_t)&fb_waiting);
	}
}

static void
fbwait()
{
	int s = splfb();

	while (*(volatile fbregp *)FB_ADDR) {
		fb_waiting = 1;
		sleep((caddr_t)&fb_waiting, FBPRI);
	}
	(void) splx(s);
}

void
fbstart(fbp, wait)
	struct fbreg *fbp;
	int wait;
{

	fbwait();
	*(volatile fbregp *)FB_ADDR =
#ifdef mips
	    (volatile fbregp)ipc_phys(MACH_UNCACHED_TO_CACHED(fbp));
#else
	    (volatile fbregp)ipc_phys(fbp);
#endif
	if (wait)
		fbwait();
}

#else /* USE_RAW_INTR */

void
fbstart(fbp, wait)
	register struct fbreg *fbp;
	int wait;
{
	int s = splfb();

#ifdef IPC_MRX
	msg_send(port_fb_iop, port_fb, fbp, sizeof(*fbp), MSG_INDIRECT);
#endif

	last_fb = fbp;
	if (wait) {
		fbstate |= FB_WAIT;
		sleep((caddr_t)fbreg, FBPRI);
	} else {
		fbstate |= FB_DELAY;
	}
	splx(s);
}

void
fbcint(arg)
	int arg;
{

	intrcnt[INTR_BITMAP]++;

#ifdef IPC_MRX
	msg_recv(arg, NULL, NULL, NULL, 0);
#ifdef mips
	clean_dcache((caddr_t)last_fb, sizeof(struct fbreg));
#endif
#endif /* IPC_MRX */

	if (fbstate & FB_WAIT) {
		fbstate &= ~FB_WAIT;
		wakeup((caddr_t)fbreg);
	} else if (fbstate & FB_DELAY) {
		fbstate &= ~FB_DELAY;
	} else if (fbstate & FB_DELAY2) {
		fbstate &= ~(FB_BUSY|FB_DELAY2);
		if (fbstate & FB_WANTED) {
			fbstate &= ~FB_WANTED;
			wakeup((caddr_t)&fbstate);
		}
	}
	return;
}
#endif /* USE_RAW_INTR */
#endif /* CPU_DOUBLE */

/* ARGSUSED */
fbprobe(ii)
	struct iop_device *ii;
{
	register int unit = ii->ii_unit;
	register struct fb_softc *fb = &fb_softc[unit];
#if defined(IPC_MRX) && defined(mips)
	register struct fbreg *fbp =
	    (struct fbreg *)MACH_CACHED_TO_UNCACHED(&fbreg[unit]);
#else
	register struct fbreg *fbp = &fbreg[unit];
#endif

#ifdef CPU_SINGLE
	if (unit == 0)
		register_hb_intr2(rop_xint, ii->ii_unit, ii->ii_intr);
#endif

#ifdef IPC_MRX
	if (port_fb_iop <= 0) {
#ifdef USE_RAW_INTR
		register_ipcintr(4, Xfb_intr);
#endif
		port_fb_iop = object_query("framebuf");
		if (port_fb_iop <= 0) {
			return (0);
		}
#ifndef USE_RAW_INTR
		port_fb = port_create("@port_fb", fbcint, -1);
#endif
	}
#endif /* IPC_MRX */

	fbp->fb_command = FB_CPROBE;
	fbp->fb_device = 0;
	fbp->fb_unit = unit;
	fbp->fb_data = -1;
	fbstart(fbp, 1);

	if ((fb->fbs_device = fbp->fb_data) == -1)
		return (0);
	else
		return (-1);
}

/* ARGSUSED */
fbattach(ii)
	struct iop_device *ii;
{
	register int unit = ii->ii_unit;
	register struct fb_softc *fb = &fb_softc[unit];
#if defined(IPC_MRX) && defined(mips)
	register struct fbreg *fbp =
	    (struct fbreg *)MACH_CACHED_TO_UNCACHED(&fbreg[unit]);
#else
	register struct fbreg *fbp = &fbreg[unit];
#endif

	fbp->fb_command = FB_CATTACH;
	fbp->fb_device = fb->fbs_device;
	fbstart(fbp, 1);
	fb->fbs_type = fbp->fb_scrtype;

	if (fb->fbs_type.type) {
		fb->fbs_state = 0;
		fb->fbs_flag = 0;
		printf("fb%d: %s", unit,
			(fb->fbs_type.type < sizeof(devname)/sizeof(*devname))
				? devname[fb->fbs_type.type] : "UNKNOWN");
		printf(" (%d x %d %d plane)\n",
				fb->fbs_type.visiblerect.extent.x,
				fb->fbs_type.visiblerect.extent.y,
				fb->fbs_type.plane);
	}
}

/*ARGSUSED*/
fbopen(dev, flag)
	dev_t dev;
	int flag;
{
	register int unit = FBUNIT(dev);
	register struct fb_softc *fb = &fb_softc[unit];
	register struct iop_device *ii;
#if defined(IPC_MRX) && defined(mips)
	register struct fbreg *fbp =
	    (struct fbreg *)MACH_CACHED_TO_UNCACHED(&fbreg[unit]);
#else
	register struct fbreg *fbp = &fbreg[unit];
#endif

	if (unit >= NFB || (ii = fbinfo[unit]) == 0 || ii->ii_alive == 0)
		return (ENXIO);
	if (fb->fbs_flag && !FBVIDEO(dev))
		return (EBUSY);

	if (fb->fbs_state == 0) {
		fbp->fb_device = fb->fbs_device;
		if(fbinit(fbp))
			return (EBUSY);
	}

        fb->fbs_state |= FBVIDEO(dev) ? VIDEO_USED : FB_USED;

	return (0);
}

/*ARGSUSED*/
fbclose(dev, flag)
	dev_t dev;
	int flag;
{
	register int unit = FBUNIT(dev);
	register struct fb_softc *fb = &fb_softc[unit];