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authorleo <leo@NetBSD.org>1995-03-26 07:12:03 +0000
committerleo <leo@NetBSD.org>1995-03-26 07:12:03 +0000
commit8b0113cfceadf3ee3bc427c4680b6b46bb57ceea (patch)
tree2a5b7db0400149a733175c4b1a56774b2d4c1eb7 /sys/arch/atari/dev/view.c
parent282052c7a8346370f47965457329f3b0b3fa01b7 (diff)
NetBSD/Atari, port by Leo Weppelman.
Diffstat (limited to 'sys/arch/atari/dev/view.c')
-rw-r--r--sys/arch/atari/dev/view.c407
1 files changed, 407 insertions, 0 deletions
diff --git a/sys/arch/atari/dev/view.c b/sys/arch/atari/dev/view.c
new file mode 100644
index 00000000000..3b469d3c5ea
--- /dev/null
+++ b/sys/arch/atari/dev/view.c
@@ -0,0 +1,407 @@
+/* $NetBSD: view.c,v 1.1.1.1 1995/03/26 07:12:14 leo Exp $ */
+
+/*
+ * Copyright (c) 1994 Christian E. Hopps
+ * All rights reserved.
+ *
+ * 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 Christian E. Hopps.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+/* The view major device is a placeholder device. It serves
+ * simply to map the semantics of a graphics dipslay to
+ * the semantics of a character block device. In other
+ * words the graphics system as currently built does not like to be
+ * refered to by open/close/ioctl. This device serves as
+ * a interface to graphics. */
+
+#include <sys/param.h>
+#include <sys/proc.h>
+#include <sys/ioctl.h>
+#include <sys/file.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+#include <sys/queue.h>
+#include <machine/cpu.h>
+#include <atari/dev/grfabs_reg.h>
+#include <atari/dev/viewioctl.h>
+#include <atari/dev/viewvar.h>
+#include "view.h"
+
+static void view_display __P((struct view_softc *));
+static void view_remove __P((struct view_softc *));
+static int view_setsize __P((struct view_softc *, struct view_size *));
+
+void viewclose __P((dev_t, int));
+int viewioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
+int viewopen __P((dev_t, int));
+int viewmap __P((dev_t, int, int));
+
+int view_get_colormap __P((struct view_softc *, colormap_t *));
+int view_set_colormap __P((struct view_softc *, colormap_t *));
+
+int viewprobe ();
+
+struct view_softc views[NVIEW];
+static int view_inited;
+
+int view_default_x;
+int view_default_y;
+int view_default_width = 640;
+int view_default_height = 400;
+int view_default_depth = 1;
+
+/*
+ * functions for probeing.
+ */
+viewattach(cnt)
+ int cnt;
+{
+ viewprobe();
+ printf("%d view%s configured\n", NVIEW, NVIEW > 1 ? "s" : "");
+}
+
+/* this function is called early to set up a display. */
+viewprobe()
+{
+ int i;
+
+ if(view_inited)
+ return(1);
+
+ view_inited = 1;
+
+ for(i=0; i<NVIEW; i++) {
+ views[i].view = NULL;
+ views[i].flags = 0;
+ }
+ return(1);
+}
+
+
+/*
+ * Internal functions.
+ */
+
+static void
+view_display (vu)
+ struct view_softc *vu;
+{
+ int s, i;
+
+ if (vu == NULL)
+ return;
+
+ s = spltty ();
+
+ /*
+ * mark views that share this monitor as not displaying
+ */
+ for (i=0; i<NVIEW; i++) {
+ if(views[i].flags & VUF_DISPLAY)
+ views[i].flags &= ~VUF_DISPLAY;
+ }
+
+ vu->flags |= VUF_ADDED;
+ if (vu->view) {
+ vu->view->display.x = vu->size.x;
+ vu->view->display.y = vu->size.y;
+
+ grf_display_view(vu->view);
+
+ vu->size.x = vu->view->display.x;
+ vu->size.y = vu->view->display.y;
+ vu->flags |= VUF_DISPLAY;
+ }
+ splx(s);
+}
+
+/*
+ * remove a view from our added list if it is marked as displaying
+ * switch to a new display.
+ */
+static void
+view_remove(vu)
+ struct view_softc *vu;
+{
+ int i;
+
+ if ((vu->flags & VUF_ADDED) == 0)
+ return;
+
+ vu->flags &= ~VUF_ADDED;
+ if (vu->flags & VUF_DISPLAY) {
+ for (i = 0; i < NVIEW; i++) {
+ if((views[i].flags & VUF_ADDED) && &views[i] != vu) {
+ view_display(&views[i]);
+ break;
+ }
+ }
+ }
+ vu->flags &= ~VUF_DISPLAY;
+ grf_remove_view(vu->view);
+}
+
+static int
+view_setsize(vu, vs)
+ struct view_softc *vu;
+ struct view_size *vs;
+{
+ view_t *new, *old;
+ dimen_t ns;
+ int co, cs;
+
+ co = 0;
+ cs = 0;
+ if (vs->x != vu->size.x || vs->y != vu->size.y)
+ co = 1;
+
+ if (vs->width != vu->size.width || vs->height != vu->size.height ||
+ vs->depth != vu->size.depth)
+ cs = 1;
+
+ if (cs == 0 && co == 0)
+ return(0);
+
+ ns.width = vs->width;
+ ns.height = vs->height;
+
+ new = grf_alloc_view(NULL, &ns, vs->depth);
+ if (new == NULL)
+ return(ENOMEM);
+
+ old = vu->view;
+ vu->view = new;
+ vu->size.x = new->display.x;
+ vu->size.y = new->display.y;
+ vu->size.width = new->display.width;
+ vu->size.height = new->display.height;
+ vu->size.depth = new->bitmap->depth;
+ vu->size.x = vs->x;
+ vu->size.y = vs->y;
+
+ /*
+ * we need a custom remove here to avoid letting
+ * another view display mark as not added or displayed
+ */
+ if (vu->flags & VUF_DISPLAY) {
+ vu->flags &= ~(VUF_ADDED|VUF_DISPLAY);
+ view_display(vu);
+ }
+ grf_free_view(old);
+ return(0);
+}
+
+/*
+ * functions made available by conf.c
+ */
+
+/*ARGSUSED*/
+int viewopen(dev, flags)
+dev_t dev;
+int flags;
+{
+ dimen_t size;
+ struct view_softc *vu;
+
+ vu = &views[minor(dev)];
+
+ if(minor(dev) >= NVIEW)
+ return(EXDEV);
+ if(vu->flags & VUF_OPEN)
+ return(EBUSY);
+
+ vu->size.x = view_default_x;
+ vu->size.y = view_default_y;
+ size.width = vu->size.width = view_default_width;
+ size.height = vu->size.height = view_default_height;
+ vu->size.depth = view_default_depth;
+
+ vu->view = grf_alloc_view(NULL, &size, vu->size.depth);
+ if (vu->view == NULL)
+ return(ENOMEM);
+
+ vu->size.x = vu->view->display.x;
+ vu->size.y = vu->view->display.y;
+ vu->size.width = vu->view->display.width;
+ vu->size.height = vu->view->display.height;
+ vu->size.depth = vu->view->bitmap->depth;
+ vu->flags |= VUF_OPEN;
+ return(0);
+}
+
+/*ARGSUSED*/
+void
+viewclose (dev, flags)
+ dev_t dev;
+ int flags;
+{
+ struct view_softc *vu;
+
+ vu = &views[minor(dev)];
+
+ if ((vu->flags & VUF_OPEN) == 0)
+ return;
+ view_remove (vu);
+ grf_free_view (vu->view);
+ vu->flags = 0;
+ vu->view = NULL;
+}
+
+
+/*ARGSUSED*/
+int
+viewioctl (dev, cmd, data, flag, p)
+dev_t dev;
+u_long cmd;
+caddr_t data;
+int flag;
+struct proc *p;
+{
+ struct view_softc *vu;
+ bmap_t *bm;
+ int error;
+
+ vu = &views[minor(dev)];
+ error = 0;
+
+ switch (cmd) {
+ case VIOCDISPLAY:
+ view_display(vu);
+ break;
+ case VIOCREMOVE:
+ view_remove(vu);
+ break;
+ case VIOCGSIZE:
+ bcopy(&vu->size, data, sizeof (struct view_size));
+ break;
+ case VIOCSSIZE:
+ error = view_setsize(vu, (struct view_size *)data);
+ break;
+ case VIOCGBMAP:
+ bm = (bmap_t *)data;
+ bcopy(vu->view->bitmap, bm, sizeof(bmap_t));
+ if ((int)p != -1) {
+ bm->plane = NULL;
+ bm->hw_address = NULL;
+ }
+ break;
+ case VIOCGCMAP:
+ error = view_get_colormap(vu, (colormap_t *)data);
+ break;
+ case VIOCSCMAP:
+ error = view_set_colormap(vu, (colormap_t *)data);
+ break;
+ default:
+ error = EINVAL;
+ break;
+ }
+ return(error);
+}
+
+int view_get_colormap (vu, ucm)
+struct view_softc *vu;
+colormap_t *ucm;
+{
+ int error;
+ u_short *cme;
+ u_short *uep;
+
+ if(ucm->nentries > MAX_CENTRIES)
+ return(EINVAL);
+
+ /* add one incase of zero, ick. */
+ cme = malloc(sizeof(u_short) * (ucm->nentries+1),M_IOCTLOPS,M_WAITOK);
+ if (cme == NULL)
+ return(ENOMEM);
+
+ error = 0;
+ uep = ucm->centry;
+ ucm->centry = cme; /* set entry to out alloc. */
+ if(vu->view == NULL || grf_get_colormap(vu->view, ucm))
+ error = EINVAL;
+ else error = copyout(cme, uep, sizeof(u_short) * ucm->nentries);
+ ucm->centry = uep; /* set entry back to users. */
+ free(cme, M_IOCTLOPS);
+ return(error);
+}
+
+int view_set_colormap(vu, ucm)
+struct view_softc *vu;
+colormap_t *ucm;
+{
+ colormap_t *cm;
+ int error = 0;
+
+ if(ucm->nentries > MAX_CENTRIES)
+ return(EINVAL);
+
+ cm = malloc(sizeof(u_short) * ucm->nentries + sizeof(*cm), M_IOCTLOPS,
+ M_WAITOK);
+ if(cm == NULL)
+ return(ENOMEM);
+
+ bcopy(ucm, cm, sizeof(colormap_t));
+ cm->centry = (u_short *)&cm[1]; /* table directly after. */
+ if (((error =
+ copyin(ucm->centry,cm->centry,sizeof(u_short)*ucm->nentries)) == 0)
+ && (vu->view == NULL || grf_use_colormap(vu->view, cm)))
+ error = EINVAL;
+ free(cm, M_IOCTLOPS);
+ return(error);
+}
+
+/*ARGSUSED*/
+int
+viewmap(dev, off, prot)
+dev_t dev;
+int off, prot;
+{
+ struct view_softc *vu;
+ bmap_t *bm;
+ u_char *bmd_start;
+ u_long bmd_size;
+
+ vu = &views[minor(dev)];
+ bm = vu->view->bitmap;
+ bmd_start = bm->hw_address;
+ bmd_size = bm->bytes_per_row*bm->rows*bm->depth;
+
+ if (off >= 0 && off < bmd_size)
+ return(((u_int)bmd_start + off) >> PGSHIFT);
+
+ return(-1);
+}
+
+/*ARGSUSED*/
+int
+viewselect(dev, rw)
+dev_t dev;
+int rw;
+{
+ if(rw == FREAD)
+ return(0);
+ return(1);
+}