NetBSD/sys/arch/sparc/dev/fb.c

124 lines
3.4 KiB
C

/* $NetBSD: fb.c,v 1.6 1995/04/10 07:04:18 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). This is gross; we should
* just build cdevsw[] dynamically.
*/
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <machine/fbio.h>
#include <machine/fbvar.h>
static struct fbdevice *devfb;
void
fb_unblank()
{
if (devfb)
(*devfb->fb_driver->fbd_unblank)(devfb->fb_device);
}
void
fb_attach(fb)
struct fbdevice *fb;
{
if (devfb) panic("multiple /dev/fb declarers");
devfb = fb;
}
int
fbopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
if (devfb == NULL)
return (ENXIO);
return (cdevsw[devfb->fb_major].d_open(dev, flags, mode, p));
}
int
fbclose(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
return (cdevsw[devfb->fb_major].d_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 (cdevsw[devfb->fb_major].d_ioctl(dev, cmd, data, flags, p));
}
int
fbmmap(dev, off, prot)
dev_t dev;
int off, prot;
{
int (*map)() = cdevsw[devfb->fb_major].d_mmap;
if (map == NULL)
return (-1);
return (map(dev, off, prot));
}