Date: Tue, 29 Apr 1997 03:18:09 PDT From: Craig Leres <leres@ee.lbl.gov> To: freebsd-mobile@freebsd.org Subject: blacklight blanking syscons module for the Butterfly Message-ID: <199704291018.DAA13110@hot.ee.lbl.gov>
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Ever since I switched my IBM 701 to FreeBSD, it's annoyed me that the
"green" screen saver didn't turn off the backlight. I took a look at
this tonight and found some code I wrote for BSD/OS once upon a time.
It was easily adapted as the appended loadable kernel module and works
great! It will probably work with any Chips & Technologies 65545/65540
based notebook/laptop (and falls back to the normal "green" behavior
when using something else).
The easiest way to build it is to unpack the appended sharchive in
/sys/syscons/lcd, build and install it (in /lkm) and change
/etc/sysconfig to use saver=lcd (and set blanktime to some non-zero
number of seconds).
(It would be really cool if this got picked up and incorporated back
into the official source tree.)
Craig
- ------
#! /bin/sh
# This is a shell archive, meaning:
# 1. Remove everything above the #! /bin/sh line.
# 2. Save the resulting text in a file.
# 3. Execute the file with /bin/sh (not csh) to create the files:
# lcd_saver.c
# Makefile
# This archive created: Tue Apr 29 03:08:48 1997
export PATH; PATH=/bin:$PATH
echo shar: extracting "'lcd_saver.c'" '(4192 characters)'
if test -f 'lcd_saver.c'
then
echo shar: will not over-write existing file "'lcd_saver.c'"
else
sed 's/^X//' << \SHAR_EOF > 'lcd_saver.c'
X/*-
X * Copyright (c) 1995, 1997 Sxren Schmidt
X * All rights reserved.
X *
X *
X * Redistribution and use in source and binary forms, with or without
X * modification, are permitted provided that the following conditions
X * are met:
X * 1. Redistributions of source code must retain the above copyright
X * notice, this list of conditions and the following disclaimer
X * in this position and unchanged.
X * 2. Redistributions in binary form must reproduce the above copyright
X * notice, this list of conditions and the following disclaimer in the
X * documentation and/or other materials provided with the distribution.
X * 3. The name of the author may not be used to endorse or promote products
X * derived from this software withough specific prior written permission
X *
X * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
X * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
X * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
X * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
X * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
X * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
X * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
X * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
X * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
X * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
X *
X * CT65545 backlight hacks by Craig Leres
X * Network Research Group, Lawrence Berkeley National Laboratory, April 1997
X *
X * @(#) $Header: lcd_saver.c,v 1.1 97/04/29 03:02:14 leres Exp $ (LBL)
X */
X
X#include <sys/param.h>
X#include <sys/systm.h>
X#include <sys/conf.h>
X#include <sys/exec.h>
X#include <sys/sysent.h>
X#include <sys/lkm.h>
X#include <sys/errno.h>
X#include <saver.h>
X
X/* Chips & Technologies 65545 extension registers */
X#define CT_XRI 0x3d6 /* extension index */
X#define CT_XRD 0x3d7 /* extension data */
X
X#define XR_CHPVER 0x00 /* (XR00) chip version */
X#define XR_CHPVER_MSK 0x07 /* chip version mask */
X#define XR_CHPVER_545 0xd8 /* 65545 version base */
X#define XR_CHPVER_540 0xd0 /* 65540 version base */
X#define XR_PWRCTL 0x52 /* (XR52) power down control */
X#define XR_PWRCTL_PANOFF 0x08 /* panel off mode */
X#ifdef notdef
X#define XR_TMRCTL 0x5c /* (XR5C) activity timer ctl */
X#define XR_TMRCTL_MSK 0x1f /* activity timer count mask */
X#define XR_TMRCTL_ENA 0x80 /* enable activity timer */
X#endif
X
XMOD_MISC(lcd_saver);
X
Xvoid (*current_saver)(int blank);
Xvoid (*old_saver)(int blank);
X
Xstatic void
Xlcd_saver(int blank)
X{
X u_char val;
X register u_int chipver;
X
X if (blank) {
X scrn_blanked = 1;
X
X /* Special panel backlight blanking for the CT 65545/65540 */
X outb(CT_XRI, XR_CHPVER);
X chipver = inb(CT_XRD);
X chipver &= ~XR_CHPVER_MSK;
X if (chipver == XR_CHPVER_545 || chipver == XR_CHPVER_540) {
X outb(CT_XRI, XR_PWRCTL);
X outb(CT_XRD, inb(CT_XRD) | XR_PWRCTL_PANOFF);
X } else {
X /* blank stuff */
X outb(TSIDX, 0x01); val = inb(TSREG);
X outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
X
X /* green stuff */
X outb(crtc_addr, 0x17); val = inb(crtc_addr + 1);
X outb(crtc_addr + 1, val & ~0x80);
X }
X }
X else {
X outb(CT_XRI, XR_CHPVER);
X chipver = inb(CT_XRD);
X chipver &= ~XR_CHPVER_MSK;
X if (chipver == XR_CHPVER_545 || chipver == XR_CHPVER_540) {
X outb(CT_XRI, XR_PWRCTL);
X outb(CT_XRD, inb(CT_XRD) & ~XR_PWRCTL_PANOFF);
X } else {
X /* blank stuff */
X outb(TSIDX, 0x01); val = inb(TSREG);
X outb(TSIDX, 0x01); outb(TSREG, val & 0xDF);
X
X /* green stuff */
X outb(crtc_addr, 0x17); val = inb(crtc_addr + 1);
X outb(crtc_addr + 1, val | 0x80);
X }
X
X scrn_blanked = 0;
X }
X}
X
Xstatic int
Xlcd_saver_load(struct lkm_table *lkmtp, int cmd)
X{
X (*current_saver)(0);
X old_saver = current_saver;
X current_saver = lcd_saver;
X return 0;
X}
X
Xstatic int
Xlcd_saver_unload(struct lkm_table *lkmtp, int cmd)
X{
X (*current_saver)(0);
X current_saver = old_saver;
X return 0;
X}
X
Xint
Xlcd_saver_mod(struct lkm_table *lkmtp, int cmd, int ver)
X{
X DISPATCH(lkmtp, cmd, ver, lcd_saver_load, lcd_saver_unload,
X lkm_nullcmd);
X}
SHAR_EOF
if test 4192 -ne "`wc -c < 'lcd_saver.c'`"
then
echo shar: error transmitting "'lcd_saver.c'" '(should have been 4192 characters)'
fi
fi # end of overwriting check
echo shar: extracting "'Makefile'" '(196 characters)'
if test -f 'Makefile'
then
echo shar: will not over-write existing file "'Makefile'"
else
sed 's/^X//' << \SHAR_EOF > 'Makefile'
X# @(#) $Header: Makefile,v 1.1 97/04/29 03:08:08 leres Exp $ (LBL)
X
XKMOD= lcd_saver_mod
XSRCS= lcd_saver.c
X
XNOMAN=
XCFLAGS+= -DLKM -I${.CURDIR}/.. -I${.CURDIR}/../../../sys
X
X.include <bsd.kmod.mk>
SHAR_EOF
if test 196 -ne "`wc -c < 'Makefile'`"
then
echo shar: error transmitting "'Makefile'" '(should have been 196 characters)'
fi
fi # end of overwriting check
# End of shell archive
exit 0
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