1 /* $NetBSD: videomode.c,v 1.9 2018/01/23 21:06:26 sevan 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(int);
49 void dump_vm(struct grfvideo_mode *);
50 int get_grf(void);
51 void set_mode(int);
52 void usage(void) __dead;
53
54 int
main(int argc,char * argv[])55 main(int argc, char *argv[])
56 {
57 int m;
58 int c;
59
60 if (argc == 1) {
61 dump_mode(0);
62 return (0);
63 }
64 while ((c = getopt(argc, argv, "as:")) != -1) {
65 switch (c) {
66 case 'a':
67 if (optind < argc)
68 usage();
69 dump_mode(-1);
70 return (0);
71 case 's':
72 m = atoi(optarg);
73 if (m == 0 || optind < argc)
74 usage();
75 set_mode(m);
76 return (0);
77 }
78 }
79
80 argc -= optind;
81 argv += optind;
82 if (argc != 1)
83 usage();
84
85 dump_mode(atoi(*argv));
86 return (0);
87 }
88
89
90 int
get_grf()91 get_grf()
92 {
93 struct stat stb;
94 char grfname[80];
95 int grffd;
96
97 /* find out on which ite/grf we are */
98 if (fstat(0, &stb) == -1)
99 err(1, "fstat 0");
100 if (!S_ISCHR(stb.st_mode) || !isatty(0))
101 errx(1, "stdin not a tty");
102 if (major(stb.st_rdev) != 13)
103 errx(1, "stdin not an ite device");
104 (void)snprintf(grfname, sizeof(grfname), "/dev/grf%u",
105 (u_int)minor(stb.st_rdev) & 0x7);
106 if ((grffd = open(grfname, 2)) < 0)
107 err(1, "%s", grfname);
108 return (grffd);
109 }
110
111 void
dump_mode(int m)112 dump_mode(int m)
113 {
114 struct grfvideo_mode vm;
115 int num_vm;
116 int grffd;
117
118 grffd = get_grf();
119
120 if (ioctl(grffd, GRFGETNUMVM, &num_vm) < 0)
121 err(1, "GRFGETNUMVM");
122 if (m > 0 && m > num_vm)
123 errx(1, "no such mode");
124 if (m <= 0) {
125 (void)printf("Current mode:\n");
126 vm.mode_num = 0;
127 if (ioctl(grffd, GRFGETVMODE, &vm) == 0)
128 dump_vm(&vm);
129 (void)printf("\n");
130 }
131 if (m >= 0) {
132 (void)close(grffd);
133 return;
134 }
135 for (m = 1; m <= num_vm; m++) {
136 vm.mode_num = m;
137 if (ioctl(grffd, GRFGETVMODE, &vm) == -1)
138 break;
139 dump_vm(&vm);
140 }
141 (void)close(grffd);
142 }
143
144 void
set_mode(int m)145 set_mode(int m)
146 {
147 int grffd;
148
149 grffd = get_grf();
150 (void)ioctl(grffd, GRFSETVMODE, &m);
151 (void)close(grffd);
152 }
153
154 void
dump_vm(struct grfvideo_mode * vm)155 dump_vm(struct grfvideo_mode *vm)
156 {
157 (void)printf("%d: %s\n", vm->mode_num, vm->mode_descr);
158 (void)printf(
159 "pixel_clock = %lu, width = %d, height = %d, depth = %d\n",
160 vm->pixel_clock, vm->disp_width, vm->disp_height, vm->depth);
161 }
162
163 void
usage()164 usage()
165 {
166 (void)fprintf(stderr, "usage: videomode [mode]\n");
167 (void)fprintf(stderr, "usage: videomode -a\n");
168 (void)fprintf(stderr, "usage: videomode -s mode\n");
169 exit(0);
170 }
171