458 lines
9.9 KiB
C
458 lines
9.9 KiB
C
/* $NetBSD: view.c,v 1.16 1998/12/20 14:32:53 thomas Exp $ */
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/*
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* Copyright (c) 1994 Christian E. Hopps
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* All rights reserved.
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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 Christian E. Hopps.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* The view major device is a placeholder device. It serves
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* simply to map the semantics of a graphics dipslay to
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* the semantics of a character block device. In other
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* words the graphics system as currently built does not like to be
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* refered to by open/close/ioctl. This device serves as
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* a interface to graphics. */
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/ioctl.h>
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#include <sys/file.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <sys/queue.h>
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#include <sys/conf.h>
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#include <sys/poll.h>
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#include <machine/cpu.h>
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#include <atari/dev/grfabs_reg.h>
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#include <atari/dev/viewioctl.h>
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#include <atari/dev/viewvar.h>
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#include "view.h"
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static void view_display __P((struct view_softc *));
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static void view_remove __P((struct view_softc *));
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static int view_setsize __P((struct view_softc *, struct view_size *));
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static int view_get_colormap __P((struct view_softc *, colormap_t *));
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static int view_set_colormap __P((struct view_softc *, colormap_t *));
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struct view_softc views[NVIEW];
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static int view_inited;
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int view_default_x;
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int view_default_y;
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int view_default_width = 640;
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int view_default_height = 400;
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int view_default_depth = 1;
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/*
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* functions for probeing.
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*/
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void viewattach __P((int));
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void
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viewattach(cnt)
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int cnt;
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{
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viewprobe();
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printf("%d view%s configured\n", NVIEW, NVIEW > 1 ? "s" : "");
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}
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/* this function is called early to set up a display. */
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int
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viewprobe()
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{
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int i;
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if(view_inited)
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return(1);
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view_inited = 1;
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for(i=0; i<NVIEW; i++) {
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views[i].view = NULL;
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views[i].flags = 0;
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}
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return(1);
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}
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/*
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* Internal functions.
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*/
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static void
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view_display (vu)
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struct view_softc *vu;
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{
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int s, i;
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if (vu == NULL)
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return;
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s = spltty();
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/*
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* mark views that share this monitor as not displaying
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*/
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for (i = 0; i < NVIEW; i++) {
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if(views[i].flags & VUF_DISPLAY) {
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if (vu->view && (vu->view == views[i].view)) {
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splx(s);
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return;
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}
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if (views[i].view) {
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grf_save_view(views[i].view);
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views[i].view->flags &= ~VF_DISPLAY;
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}
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views[i].flags &= ~VUF_DISPLAY;
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}
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}
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vu->flags |= VUF_ADDED;
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if (vu->view) {
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vu->view->display.x = vu->size.x;
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vu->view->display.y = vu->size.y;
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grf_display_view(vu->view);
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vu->view->flags |= VF_DISPLAY;
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vu->size.x = vu->view->display.x;
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vu->size.y = vu->view->display.y;
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vu->flags |= VUF_DISPLAY;
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}
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splx(s);
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}
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/*
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* remove a view from our added list if it is marked as displaying
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* switch to a new display.
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*/
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static void
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view_remove(vu)
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struct view_softc *vu;
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{
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int i;
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if ((vu->flags & VUF_ADDED) == 0)
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return;
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vu->flags &= ~VUF_ADDED;
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if (vu->flags & VUF_DISPLAY) {
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for (i = 0; i < NVIEW; i++) {
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if((views[i].flags & VUF_ADDED) && &views[i] != vu) {
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view_display(&views[i]);
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break;
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}
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}
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}
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vu->flags &= ~VUF_DISPLAY;
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grf_remove_view(vu->view);
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}
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static int
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view_setsize(vu, vs)
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struct view_softc *vu;
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struct view_size *vs;
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{
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view_t *new, *old;
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dmode_t *dmode;
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dimen_t ns;
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int co, cs;
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co = 0;
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cs = 0;
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if (vs->x != vu->size.x || vs->y != vu->size.y)
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co = 1;
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if (vs->width != vu->size.width || vs->height != vu->size.height ||
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vs->depth != vu->size.depth)
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cs = 1;
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if (cs == 0 && co == 0)
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return(0);
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ns.width = vs->width;
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ns.height = vs->height;
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if((dmode = grf_get_best_mode(&ns, vs->depth)) != NULL) {
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/*
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* If we can't do better, leave it
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*/
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if(dmode == vu->view->mode)
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return(0);
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}
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new = grf_alloc_view(dmode, &ns, vs->depth);
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if (new == NULL)
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return(ENOMEM);
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old = vu->view;
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vu->view = new;
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vu->size.x = new->display.x;
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vu->size.y = new->display.y;
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vu->size.width = new->display.width;
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vu->size.height = new->display.height;
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vu->size.depth = new->bitmap->depth;
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/*
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* we need a custom remove here to avoid letting
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* another view display mark as not added or displayed
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*/
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if (vu->flags & VUF_DISPLAY) {
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vu->flags &= ~(VUF_ADDED|VUF_DISPLAY);
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view_display(vu);
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}
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grf_free_view(old);
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return(0);
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}
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static int
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view_get_colormap (vu, ucm)
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struct view_softc *vu;
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colormap_t *ucm;
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{
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int error;
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long *cme;
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long *uep;
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if(ucm->size > MAX_CENTRIES)
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return(EINVAL);
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/* add one incase of zero, ick. */
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cme = malloc(sizeof(ucm->entry[0])*(ucm->size+1), M_IOCTLOPS,M_WAITOK);
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if (cme == NULL)
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return(ENOMEM);
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error = 0;
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uep = ucm->entry;
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ucm->entry = cme; /* set entry to out alloc. */
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if(vu->view == NULL || grf_get_colormap(vu->view, ucm))
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error = EINVAL;
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else error = copyout(cme, uep, sizeof(ucm->entry[0]) * ucm->size);
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ucm->entry = uep; /* set entry back to users. */
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free(cme, M_IOCTLOPS);
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return(error);
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}
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static int
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view_set_colormap(vu, ucm)
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struct view_softc *vu;
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colormap_t *ucm;
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{
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colormap_t *cm;
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int error = 0;
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if(ucm->size > MAX_CENTRIES)
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return(EINVAL);
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cm = malloc(sizeof(ucm->entry[0])*ucm->size + sizeof(*cm), M_IOCTLOPS,
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M_WAITOK);
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if(cm == NULL)
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return(ENOMEM);
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bcopy(ucm, cm, sizeof(colormap_t));
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cm->entry = (long *)&cm[1]; /* table directly after. */
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if (((error =
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copyin(ucm->entry,cm->entry,sizeof(ucm->entry[0])*ucm->size)) == 0)
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&& (vu->view == NULL || grf_use_colormap(vu->view, cm)))
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error = EINVAL;
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free(cm, M_IOCTLOPS);
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return(error);
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}
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/*
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* functions made available by conf.c
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*/
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/*ARGSUSED*/
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int
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viewopen(dev, flags, mode, p)
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dev_t dev;
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int flags;
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int mode;
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struct proc *p;
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{
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dimen_t size;
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struct view_softc *vu;
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vu = &views[minor(dev)];
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if(minor(dev) >= NVIEW)
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return(EXDEV);
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if(vu->flags & VUF_OPEN)
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return(EBUSY);
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vu->size.x = view_default_x;
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vu->size.y = view_default_y;
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size.width = vu->size.width = view_default_width;
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size.height = vu->size.height = view_default_height;
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vu->size.depth = view_default_depth;
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vu->view = grf_alloc_view(NULL, &size, vu->size.depth);
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if (vu->view == NULL)
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return(ENOMEM);
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vu->size.x = vu->view->display.x;
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vu->size.y = vu->view->display.y;
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vu->size.width = vu->view->display.width;
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vu->size.height = vu->view->display.height;
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vu->size.depth = vu->view->bitmap->depth;
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vu->flags |= VUF_OPEN;
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return(0);
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}
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/*ARGSUSED*/
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int
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viewclose (dev, flags, mode, p)
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dev_t dev;
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int flags;
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int mode;
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struct proc *p;
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{
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struct view_softc *vu;
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vu = &views[minor(dev)];
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if ((vu->flags & VUF_OPEN) == 0)
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return (0); /* XXX not open? */
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view_remove (vu);
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grf_free_view (vu->view);
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vu->flags = 0;
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vu->view = NULL;
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return (0);
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}
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/*ARGSUSED*/
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int
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viewioctl (dev, cmd, data, flag, 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 flag;
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struct proc *p;
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{
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struct view_softc *vu;
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bmap_t *bm;
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int error;
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vu = &views[minor(dev)];
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error = 0;
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switch (cmd) {
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case VIOCDISPLAY:
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view_display(vu);
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break;
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case VIOCREMOVE:
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view_remove(vu);
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break;
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case VIOCGSIZE:
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bcopy(&vu->size, data, sizeof (struct view_size));
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break;
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case VIOCSSIZE:
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error = view_setsize(vu, (struct view_size *)data);
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break;
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case VIOCGBMAP:
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bm = (bmap_t *)data;
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bcopy(vu->view->bitmap, bm, sizeof(bmap_t));
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if (p != NOPROC) {
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bm->plane = NULL;
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bm->hw_address = NULL;
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bm->regs = NULL;
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bm->hw_regs = NULL;
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}
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break;
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case VIOCGCMAP:
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error = view_get_colormap(vu, (colormap_t *)data);
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break;
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case VIOCSCMAP:
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error = view_set_colormap(vu, (colormap_t *)data);
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break;
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default:
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error = EINVAL;
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break;
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}
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return(error);
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}
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/*ARGSUSED*/
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int
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viewmmap(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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struct view_softc *vu;
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bmap_t *bm;
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u_char *bmd_start;
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u_long bmd_lin, bmd_vga;
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vu = &views[minor(dev)];
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bm = vu->view->bitmap;
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bmd_start = bm->hw_address;
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bmd_lin = bm->lin_base;
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bmd_vga = bm->vga_base;
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/*
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* control registers
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*/
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if (off >= 0 && off < bm->reg_size)
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return(((u_int)bm->hw_regs + off) >> PGSHIFT);
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/*
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* VGA memory
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*/
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if (off >= bmd_vga && off < (bmd_vga + bm->vga_mappable))
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return(((u_int)bm->vga_address - bmd_vga + off) >> PGSHIFT);
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/*
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* frame buffer
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*/
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if (off >= bmd_lin && off < (bmd_lin + bm->phys_mappable))
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return(((u_int)bmd_start - bmd_lin + off) >> PGSHIFT);
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return(-1);
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}
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/*ARGSUSED*/
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int
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viewpoll(dev, events, p)
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dev_t dev;
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int events;
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struct proc *p;
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{
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int revents = 0;
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if (events & (POLLOUT | POLLWRNORM))
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revents |= events & (POLLOUT | POLLWRNORM);
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return (revents);
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}
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view_t *
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viewview(dev)
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dev_t dev;
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{
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return(views[minor(dev)].view);
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}
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