84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*-
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* Copyright (c) 1995 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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* $Id$
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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/conf.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 <sys/errno.h>
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#include <saver.h>
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MOD_MISC(blank_saver);
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void (*current_saver)(int blank);
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void (*old_saver)(int blank);
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static void
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blank_saver(int blank)
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{
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u_char val;
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if (blank) {
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scrn_blanked = 1;
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outb(TSIDX, 0x01); val = inb(TSREG);
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outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
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}
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else {
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outb(TSIDX, 0x01); val = inb(TSREG);
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outb(TSIDX, 0x01); outb(TSREG, val & 0xDF);
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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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blank_saver_load(struct lkm_table *lkmtp, int cmd)
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{
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(*current_saver)(0);
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old_saver = current_saver;
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current_saver = blank_saver;
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return 0;
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}
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static int
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blank_saver_unload(struct lkm_table *lkmtp, int cmd)
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{
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(*current_saver)(0);
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current_saver = old_saver;
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return 0;
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}
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int
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blank_saver_mod(struct lkm_table *lkmtp, int cmd, int ver)
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{
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DISPATCH(lkmtp, cmd, ver, blank_saver_load, blank_saver_unload,
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lkm_nullcmd);
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}
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