174 lines
4.2 KiB
C
174 lines
4.2 KiB
C
/* $NetBSD: fb.c,v 1.3 1995/04/10 05:45:56 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).
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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/ioctl.h>
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#include <sys/proc.h>
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#include <machine/fbio.h>
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#include "fbvar.h"
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static struct fbdevice *devfb;
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static int fbpriority;
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/*
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* This is called by the real driver (i.e. bw2, cg3, ...)
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* to declare itself as a potential default frame buffer.
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*/
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void
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fb_attach(fb, newpri)
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struct fbdevice *fb;
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int newpri;
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{
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if (fbpriority < newpri) {
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fbpriority = newpri;
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devfb = fb;
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}
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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 ((*devfb->fb_driver->fbd_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 ((*devfb->fb_driver->fbd_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 (fbioctlfb(devfb, cmd, data));
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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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return ((*devfb->fb_driver->fbd_mmap)(dev, off, prot));
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}
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void
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fb_unblank()
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{
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int on = 1;
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if (devfb) {
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(void) fbioctlfb(devfb, FBIOSVIDEO, (caddr_t)&on);
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}
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}
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/*
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* Common fb ioctl function
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*/
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int
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fbioctlfb(fb, cmd, data)
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struct fbdevice *fb;
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u_long cmd;
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caddr_t data;
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{
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struct fbdriver *fbd = fb->fb_driver;
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int error;
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switch (cmd) {
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case FBIOGTYPE:
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*(struct fbtype *)data = fb->fb_fbtype;
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error = 0;
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break;
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case FBIOGATTR:
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error = (*fbd->fbd_gattr)(fb, (struct fbgattr *)data);
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break;
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case FBIOGVIDEO:
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error = (*fbd->fbd_gvideo)(fb, (int *)data);
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break;
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case FBIOSVIDEO:
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error = (*fbd->fbd_svideo)(fb, (int *)data);
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break;
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case FBIOGETCMAP:
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error = (*fbd->fbd_getcmap)(fb, (struct fbcmap *)data);
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break;
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case FBIOPUTCMAP:
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error = (*fbd->fbd_putcmap)(fb, (struct fbcmap *)data);
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break;
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default:
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error = ENOTTY;
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}
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return (error);
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}
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