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/* $NetBSD: fb.c,v 1.3 1995/04/10 05:45:56 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.
*
* @(#)fb.c 8.1 (Berkeley) 6/11/93
*/
/*
* /dev/fb (indirect frame buffer driver).
*/
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <machine/fbio.h>
#include "fbvar.h"
static struct fbdevice *devfb;
static int fbpriority;
/*
* This is called by the real driver (i.e. bw2, cg3, ...)
* to declare itself as a potential default frame buffer.
*/
void
fb_attach(fb, newpri)
struct fbdevice *fb;
int newpri;
{
if (fbpriority < newpri) {
fbpriority = newpri;
devfb = fb;
}
}
int
fbopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
if (devfb == NULL)
return (ENXIO);
return ((*devfb->fb_driver->fbd_open)(dev, flags, mode, p));
}
int
fbclose(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
return ((*devfb->fb_driver->fbd_close)(dev, flags, mode, p));
}
int
fbioctl(dev, cmd, data, flags, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flags;
struct proc *p;
{
return (fbioctlfb(devfb, cmd, data));
}
int
fbmmap(dev, off, prot)
dev_t dev;
int off, prot;
{
return ((*devfb->fb_driver->fbd_mmap)(dev, off, prot));
}
void
fb_unblank()
{
int on = 1;
if (devfb) {
(void) fbioctlfb(devfb, FBIOSVIDEO, (caddr_t)&on);
}
}
/*
* Common fb ioctl function
*/
int
fbioctlfb(fb, cmd, data)
struct fbdevice *fb;
u_long cmd;
caddr_t data;
{
struct fbdriver *fbd = fb->fb_driver;
int error;
switch (cmd) {
case FBIOGTYPE:
*(struct fbtype *)data = fb->fb_fbtype;
error = 0;
break;
case FBIOGATTR:
error = (*fbd->fbd_gattr)(fb, (struct fbgattr *)data);
break;
case FBIOGVIDEO:
error = (*fbd->fbd_gvideo)(fb, (int *)data);
break;
case FBIOSVIDEO:
error = (*fbd->fbd_svideo)(fb, (int *)data);
break;
case FBIOGETCMAP:
error = (*fbd->fbd_getcmap)(fb, (struct fbcmap *)data);
break;
case FBIOPUTCMAP:
error = (*fbd->fbd_putcmap)(fb, (struct fbcmap *)data);
break;
default:
error = ENOTTY;
}
return (error);
}
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