1 /* $NetBSD: videomode.c,v 1.4 1997/10/19 19:55:56 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Christian E. Hopps 5 * Copyright (c) 1994 Markus Wild 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Markus Wild 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 #include <sys/ioctl.h> 37 #include <sys/device.h> 38 #include <amiga/dev/grfioctl.h> 39 #include <amiga/dev/grfvar.h> 40 41 #include <err.h> 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 48 void dump_mode __P((int)); 49 void dump_vm __P((struct grfvideo_mode *)); 50 int get_grf __P((void)); 51 int main __P((int, char **)); 52 void set_mode __P((int)); 53 void usage __P((void)); 54 55 int 56 main(argc, argv) 57 int argc; 58 char *argv[]; 59 { 60 int m; 61 int c; 62 63 if (argc == 1) { 64 dump_mode(0); 65 return (0); 66 } 67 while ((c = getopt(argc, argv, "as:")) != -1) { 68 switch (c) { 69 case 'a': 70 if (optind < argc) 71 usage(); 72 dump_mode(-1); 73 return (0); 74 case 's': 75 m = atoi(optarg); 76 if (m == 0 || optind < argc) 77 usage(); 78 set_mode(m); 79 return (0); 80 } 81 } 82 83 argc -= optind; 84 argv += optind; 85 if (argc != 1) 86 usage(); 87 88 dump_mode(atoi(*argv)); 89 return (0); 90 } 91 92 93 int 94 get_grf() 95 { 96 struct stat stb; 97 char grfname[80]; 98 int grffd; 99 100 /* find out on which ite/grf we are */ 101 if (fstat(0, &stb) == -1) 102 err(1, "fstat 0"); 103 if (!S_ISCHR(stb.st_mode) || !isatty(0)) 104 errx(1, "stdin not a tty"); 105 if (major(stb.st_rdev) != 13) 106 errx(1, "stdin not an ite device"); 107 (void)sprintf(grfname, "/dev/grf%d", minor(stb.st_rdev) & 0x7); 108 if ((grffd = open(grfname, 2)) < 0) 109 err(1, "%s", grfname); 110 return (grffd); 111 } 112 113 void 114 dump_mode(m) 115 int m; 116 { 117 struct grfvideo_mode vm; 118 int num_vm; 119 int grffd; 120 121 grffd = get_grf(); 122 123 if (ioctl(grffd, GRFGETNUMVM, &num_vm) < 0) 124 err(1, "GRFGETNUMVM"); 125 if (m > 0 && m > num_vm) 126 errx(1, "no such mode"); 127 if (m <= 0) { 128 (void)printf("Current mode:\n"); 129 vm.mode_num = 0; 130 if (ioctl(grffd, GRFGETVMODE, &vm) == 0) 131 dump_vm(&vm); 132 (void)printf("\n"); 133 } 134 if (m >= 0) 135 return; 136 for (m = 1; m <= num_vm; m++) { 137 vm.mode_num = m; 138 if (ioctl(grffd, GRFGETVMODE, &vm) == -1) 139 break; 140 dump_vm(&vm); 141 } 142 } 143 144 void 145 set_mode(m) 146 int m; 147 { 148 int grffd; 149 150 grffd = get_grf(); 151 (void)ioctl(grffd, GRFSETVMODE, &m); 152 } 153 154 void 155 dump_vm(vm) 156 struct grfvideo_mode *vm; 157 { 158 (void)printf("%d: %s\n", vm->mode_num, vm->mode_descr); 159 (void)printf( 160 "pixel_clock = %lu, width = %d, height = %d, depth = %d\n", 161 vm->pixel_clock, vm->disp_width, vm->disp_height, vm->depth); 162 } 163 164 void 165 usage() 166 { 167 (void)fprintf(stderr, "usage: videomode [mode]\n"); 168 (void)fprintf(stderr, "usage: videomode -a\n"); 169 (void)fprintf(stderr, "usage: videomode -s mode\n"); 170 exit(0); 171 } 172