1 /*- 2 * Copyright (c) 1995-1997 S�ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software withough specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $Id: fade_saver.c,v 1.10 1997/04/06 10:48:18 dufault Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/exec.h> 34 #include <sys/sysent.h> 35 #include <sys/lkm.h> 36 37 #include <i386/isa/isa.h> 38 39 #include <saver.h> 40 41 MOD_MISC(fade_saver); 42 43 static void 44 fade_saver(int blank) 45 { 46 static int count = 0; 47 int i; 48 49 if (blank) { 50 scrn_blanked = 1; 51 if (count < 64) { 52 outb(PIXMASK, 0xFF); /* no pixelmask */ 53 outb(PALWADR, 0x00); 54 outb(PALDATA, 0); 55 outb(PALDATA, 0); 56 outb(PALDATA, 0); 57 for (i = 3; i < 768; i++) { 58 if (palette[i] - count > 15) 59 outb(PALDATA, palette[i]-count); 60 else 61 outb(PALDATA, 15); 62 } 63 inb(crtc_addr+6); /* reset flip/flop */ 64 outb(ATC, 0x20); /* enable palette */ 65 count++; 66 } 67 } 68 else { 69 load_palette(palette); 70 count = scrn_blanked = 0; 71 } 72 } 73 74 static int 75 fade_saver_load(struct lkm_table *lkmtp, int cmd) 76 { 77 if (!crtc_vga) 78 return EINVAL; 79 return add_scrn_saver(fade_saver); 80 } 81 82 static int 83 fade_saver_unload(struct lkm_table *lkmtp, int cmd) 84 { 85 return remove_scrn_saver(fade_saver); 86 } 87 88 int 89 fade_saver_mod(struct lkm_table *lkmtp, int cmd, int ver) 90 { 91 MOD_DISPATCH(fade_saver, lkmtp, cmd, ver, 92 fade_saver_load, fade_saver_unload, lkm_nullcmd); 93 } 94