green_saver.c revision 27427
16628Ssos/*- 26628Ssos * Copyright (c) 1995 S�ren Schmidt 36628Ssos * All rights reserved. 46628Ssos * 56628Ssos * Redistribution and use in source and binary forms, with or without 66628Ssos * modification, are permitted provided that the following conditions 76628Ssos * are met: 86628Ssos * 1. Redistributions of source code must retain the above copyright 98871Srgrimes * notice, this list of conditions and the following disclaimer 106628Ssos * in this position and unchanged. 116628Ssos * 2. Redistributions in binary form must reproduce the above copyright 126628Ssos * notice, this list of conditions and the following disclaimer in the 136628Ssos * documentation and/or other materials provided with the distribution. 146628Ssos * 3. The name of the author may not be used to endorse or promote products 156628Ssos * derived from this software withough specific prior written permission 166628Ssos * 176628Ssos * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 186628Ssos * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 196628Ssos * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 206628Ssos * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 216628Ssos * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 226628Ssos * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 236628Ssos * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 246628Ssos * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 256628Ssos * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 266628Ssos * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 276628Ssos * 2827427Syokota * $Id: green_saver.c,v 1.9 1997/04/06 10:49:13 dufault Exp $ 296628Ssos */ 306628Ssos 316628Ssos#include <sys/param.h> 326628Ssos#include <sys/systm.h> 336628Ssos#include <sys/exec.h> 346628Ssos#include <sys/sysent.h> 356628Ssos#include <sys/lkm.h> 3627427Syokota 3727427Syokota#include <i386/isa/isa.h> 3827427Syokota 396628Ssos#include <saver.h> 406628Ssos 4112276SbdeMOD_MISC(green_saver); 426628Ssos 438871Srgrimesstatic void 446628Ssosgreen_saver(int blank) 456628Ssos{ 466628Ssos u_char val; 476628Ssos if (blank) { 486628Ssos scrn_blanked = 1; 498871Srgrimes outb(TSIDX, 0x01); val = inb(TSREG); 506628Ssos outb(TSIDX, 0x01); outb(TSREG, val | 0x20); 516628Ssos outb(crtc_addr, 0x17); val = inb(crtc_addr + 1); 526628Ssos outb(crtc_addr + 1, val & ~0x80); 536628Ssos } 546628Ssos else { 558871Srgrimes outb(TSIDX, 0x01); val = inb(TSREG); 566628Ssos outb(TSIDX, 0x01); outb(TSREG, val & 0xDF); 576628Ssos outb(crtc_addr, 0x17); val = inb(crtc_addr + 1); 586628Ssos outb(crtc_addr + 1, val | 0x80); 596628Ssos scrn_blanked = 0; 606628Ssos } 616628Ssos} 626628Ssos 6312276Sbdestatic int 6411857Spetergreen_saver_load(struct lkm_table *lkmtp, int cmd) 656628Ssos{ 6627427Syokota if (!crtc_vga) 6727427Syokota return EINVAL; 6827427Syokota return add_scrn_saver(green_saver); 696628Ssos} 706628Ssos 7112276Sbdestatic int 7211857Spetergreen_saver_unload(struct lkm_table *lkmtp, int cmd) 736628Ssos{ 7427427Syokota return remove_scrn_saver(green_saver); 756628Ssos} 766628Ssos 7712276Sbdeint 7811857Spetergreen_saver_mod(struct lkm_table *lkmtp, int cmd, int ver) 796628Ssos{ 8024673Sdufault MOD_DISPATCH(green_saver, lkmtp, cmd, ver, 8124673Sdufault green_saver_load, green_saver_unload, lkm_nullcmd); 826628Ssos} 83