freebsd-skq/sys/dev/syscons/apm/apm_saver.c
Nick Sayer 472a4993b0 Add the apm_saver syscons screen saver module.
apm_saver uses the apm_display() routine from the apm system to
"suspend" the "display" part of the machine.

This is beneficial for some laptops (or other machines with
non-traditional displays) that choke on the 'green' saver's
effect.

Another way of looking at this is that it's the same as a screen
saver that does an 'apm -d 0' to blank the display and an 'apm -d 1'
to bring it back. One probably ought to use these commands to make
sure the effect will be correct before using it unattended.
1999-10-02 03:56:42 +00:00

92 lines
2.7 KiB
C

/*-
* Copyright (c) 1999 Nick Sayer (who stole shamelessly from blank_saver)
* 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,
* without modification, immediately at the beginning of the file.
* 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 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/consio.h>
#include <sys/fbio.h>
#include <dev/fb/fbreg.h>
#include <dev/fb/splashreg.h>
#include <dev/syscons/syscons.h>
#include <sys/select.h>
#include <machine/apm_bios.h>
#include <machine/pc/bios.h>
#include <i386/apm/apm.h>
extern int apm_display __P((int newstate));
extern struct apm_softc apm_softc;
static int blanked=0;
static int
apm_saver(video_adapter_t *adp, int blank)
{
struct apm_softc *sc = &apm_softc;
if (!sc->initialized || !sc->active)
return 0;
if (blank==blanked)
return 0;
blanked=blank;
apm_display(!blanked);
return 0;
}
static int
apm_init(video_adapter_t *adp)
{
struct apm_softc *sc = &apm_softc;
if (!sc->initialized || !sc->active)
printf("WARNING: apm_saver module requires apm enabled\n");
return 0;
}
static int
apm_term(video_adapter_t *adp)
{
return 0;
}
static scrn_saver_t apm_module = {
"apm_saver", apm_init, apm_term, apm_saver, NULL,
};
SAVER_MODULE(apm_saver, apm_module);