140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/*-
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* Copyright (c) 1995-1997 Søren Schmidt
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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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* in this position and unchanged.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software withough 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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* $Id: fade_saver.c,v 1.11 1997/07/15 14:49:25 yokota Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/exec.h>
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#include <sys/sysent.h>
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#include <sys/lkm.h>
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#include <i386/isa/isa.h>
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#include <saver.h>
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MOD_MISC(fade_saver);
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static void
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fade_saver(int blank)
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{
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static int count = 0;
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int i;
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if (blank) {
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scrn_blanked = 1;
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switch (crtc_type) {
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case KD_VGA:
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if (count < 64) {
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outb(PIXMASK, 0xFF); /* no pixelmask */
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outb(PALWADR, 0x00);
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outb(PALDATA, 0);
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outb(PALDATA, 0);
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outb(PALDATA, 0);
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for (i = 3; i < 768; i++) {
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if (palette[i] - count > 15)
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outb(PALDATA, palette[i]-count);
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else
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outb(PALDATA, 15);
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}
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inb(crtc_addr+6); /* reset flip/flop */
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outb(ATC, 0x20); /* enable palette */
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count++;
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}
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break;
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case KD_EGA:
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/* not yet done XXX */
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break;
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case KD_CGA:
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outb(crtc_addr + 4, 0x25);
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break;
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case KD_MONO:
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case KD_HERCULES:
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outb(crtc_addr + 4, 0x21);
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break;
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default:
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break;
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}
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}
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else {
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switch (crtc_type) {
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case KD_VGA:
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load_palette(palette);
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count = 0;
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break;
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case KD_EGA:
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/* not yet done XXX */
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break;
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case KD_CGA:
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outb(crtc_addr + 4, 0x2d);
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break;
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case KD_MONO:
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case KD_HERCULES:
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outb(crtc_addr + 4, 0x29);
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break;
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default:
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break;
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}
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scrn_blanked = 0;
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}
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}
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static int
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fade_saver_load(struct lkm_table *lkmtp, int cmd)
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{
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switch (crtc_type) {
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case KD_MONO:
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case KD_HERCULES:
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case KD_CGA:
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/*
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* `fade' saver is not fully implemented for MDA and CGA.
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* It simply blanks the display instead.
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*/
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case KD_VGA:
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break;
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case KD_EGA:
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/* EGA is yet to be supported */
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default:
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return ENODEV;
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}
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return add_scrn_saver(fade_saver);
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}
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static int
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fade_saver_unload(struct lkm_table *lkmtp, int cmd)
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{
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return remove_scrn_saver(fade_saver);
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}
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int
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fade_saver_mod(struct lkm_table *lkmtp, int cmd, int ver)
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{
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MOD_DISPATCH(fade_saver, lkmtp, cmd, ver,
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fade_saver_load, fade_saver_unload, lkm_nullcmd);
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}
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