124 lines
3.4 KiB
C
124 lines
3.4 KiB
C
/* $NetBSD: fb.c,v 1.6 1995/04/10 07:04:18 mycroft Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)fb.c 8.1 (Berkeley) 6/11/93
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*/
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/*
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* /dev/fb (indirect frame buffer driver). This is gross; we should
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* just build cdevsw[] dynamically.
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*/
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <machine/fbio.h>
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#include <machine/fbvar.h>
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static struct fbdevice *devfb;
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void
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fb_unblank()
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{
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if (devfb)
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(*devfb->fb_driver->fbd_unblank)(devfb->fb_device);
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}
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void
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fb_attach(fb)
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struct fbdevice *fb;
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{
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if (devfb) panic("multiple /dev/fb declarers");
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devfb = fb;
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}
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int
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fbopen(dev, flags, mode, p)
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dev_t dev;
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int flags, mode;
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struct proc *p;
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{
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if (devfb == NULL)
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return (ENXIO);
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return (cdevsw[devfb->fb_major].d_open(dev, flags, mode, p));
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}
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int
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fbclose(dev, flags, mode, p)
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dev_t dev;
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int flags, mode;
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struct proc *p;
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{
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return (cdevsw[devfb->fb_major].d_close(dev, flags, mode, p));
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}
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int
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fbioctl(dev, cmd, data, flags, p)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flags;
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struct proc *p;
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{
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return (cdevsw[devfb->fb_major].d_ioctl(dev, cmd, data, flags, p));
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}
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int
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fbmmap(dev, off, prot)
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dev_t dev;
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int off, prot;
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{
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int (*map)() = cdevsw[devfb->fb_major].d_mmap;
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if (map == NULL)
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return (-1);
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return (map(dev, off, prot));
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}
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