84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*-
|
|
* Copyright (c) 1995 Søren Schmidt
|
|
* 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
|
|
* in this position and unchanged.
|
|
* 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. The name of the author may not be used to endorse or promote products
|
|
* derived from this software withough 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.
|
|
*
|
|
* $Id: blank_saver.c,v 1.5 1995/11/14 07:34:34 bde Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/lkm.h>
|
|
#include <sys/errno.h>
|
|
#include <saver.h>
|
|
|
|
MOD_MISC(blank_saver);
|
|
|
|
void (*current_saver)(int blank);
|
|
void (*old_saver)(int blank);
|
|
|
|
static void
|
|
blank_saver(int blank)
|
|
{
|
|
u_char val;
|
|
if (blank) {
|
|
scrn_blanked = 1;
|
|
outb(TSIDX, 0x01); val = inb(TSREG);
|
|
outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
|
|
}
|
|
else {
|
|
outb(TSIDX, 0x01); val = inb(TSREG);
|
|
outb(TSIDX, 0x01); outb(TSREG, val & 0xDF);
|
|
scrn_blanked = 0;
|
|
}
|
|
}
|
|
|
|
static int
|
|
blank_saver_load(struct lkm_table *lkmtp, int cmd)
|
|
{
|
|
(*current_saver)(0);
|
|
old_saver = current_saver;
|
|
current_saver = blank_saver;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
blank_saver_unload(struct lkm_table *lkmtp, int cmd)
|
|
{
|
|
(*current_saver)(0);
|
|
current_saver = old_saver;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
blank_saver_mod(struct lkm_table *lkmtp, int cmd, int ver)
|
|
{
|
|
DISPATCH(lkmtp, cmd, ver, blank_saver_load, blank_saver_unload,
|
|
lkm_nullcmd);
|
|
}
|