/* $NetBSD: fb.c,v 1.1.1.1 1997/01/14 20:57:02 gwr 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 #include #include #include #include #include #include #include "fbvar.h" cdev_decl(fb); 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)); } /* * Common fb ioctl function */ int fbioctlfb(fb, cmd, data) struct fbdevice *fb; u_long cmd; caddr_t data; { struct fbdriver *fbd = fb->fb_driver; void *vp = (void *)data; int error; switch (cmd) { case FBIOGTYPE: *(struct fbtype *)vp = fb->fb_fbtype; error = 0; break; case FBIOGATTR: error = (*fbd->fbd_gattr)(fb, vp); break; case FBIOGVIDEO: error = (*fbd->fbd_gvideo)(fb, vp); break; case FBIOSVIDEO: error = (*fbd->fbd_svideo)(fb, vp); break; case FBIOGETCMAP: error = (*fbd->fbd_getcmap)(fb, vp); break; case FBIOPUTCMAP: error = (*fbd->fbd_putcmap)(fb, vp); break; default: error = ENOTTY; } return (error); } void fb_unblank() { int on = 1; if (devfb == NULL) return; (*devfb->fb_driver->fbd_svideo)(devfb, (void *)&on); } /* * Default ioctl function to put in struct fbdriver * for functions that are not supported. */ int fb_noioctl(fbd, vp) struct fbdevice *fbd; void *vp; { return ENOTTY; }