mirror of
https://github.com/sheumann/hush.git
synced 2024-11-05 06:07:00 +00:00
4d1d0113fd
and linux kernel 2.0.36 (though the dubious reasons why someone would want to do that defy imagination ;) -Erik
300 lines
8.8 KiB
C
300 lines
8.8 KiB
C
/*
|
|
* Mini fbset implementation for busybox
|
|
*
|
|
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* This is a from-scratch implementation of fbset; but the de facto fbset
|
|
* implementation was a good reference. fbset (original) is released under
|
|
* the GPL, and is (c) 1995-1999 by:
|
|
* Geert Uytterhoeven (Geert.Uytterhoeven@cs.kuleuven.ac.be)
|
|
*/
|
|
|
|
#include "internal.h"
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <ctype.h>
|
|
#include <sys/ioctl.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/version.h>
|
|
|
|
#define PERROR(ctx) do { perror(ctx); exit(1); } while(0)
|
|
|
|
#ifndef KERNEL_VERSION
|
|
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
|
|
#endif
|
|
|
|
#define DEFAULTFBDEV "/dev/fb0"
|
|
#define DEFAULTFBMODE "/etc/fb.modes"
|
|
|
|
#define OPT_CHANGE 1
|
|
#define OPT_INFO (1 << 1)
|
|
#define OPT_READMODE (1 << 2)
|
|
|
|
#define CMD_HELP 0
|
|
#define CMD_FB 1
|
|
#define CMD_DB 2
|
|
#define CMD_GEOMETRY 3
|
|
#define CMD_TIMING 4
|
|
#define CMD_ACCEL 5
|
|
#define CMD_HSYNC 6
|
|
#define CMD_VSYNC 7
|
|
#define CMD_LACED 8
|
|
#define CMD_DOUBLE 9
|
|
/* #define CMD_XCOMPAT 10 */
|
|
#define CMD_ALL 11
|
|
#define CMD_INFO 12
|
|
|
|
#ifdef BB_FBSET_FANCY
|
|
#define CMD_XRES 13
|
|
#define CMD_YRES 14
|
|
#define CMD_VXRES 15
|
|
#define CMD_VYRES 16
|
|
#define CMD_DEPTH 17
|
|
#define CMD_MATCH 18
|
|
#define CMD_PIXCLOCK 19
|
|
#define CMD_LEFT 20
|
|
#define CMD_RIGHT 21
|
|
#define CMD_UPPER 22
|
|
#define CMD_LOWER 23
|
|
#define CMD_HSLEN 24
|
|
#define CMD_VSLEN 25
|
|
#define CMD_CSYNC 26
|
|
#define CMD_GSYNC 27
|
|
#define CMD_EXTSYNC 28
|
|
#define CMD_BCAST 29
|
|
#define CMD_RGBA 30
|
|
#define CMD_STEP 31
|
|
#define CMD_MOVE 32
|
|
#endif
|
|
|
|
static unsigned int g_options = 0;
|
|
|
|
struct cmdoptions_t {
|
|
char *name;
|
|
unsigned char param_count;
|
|
unsigned char code;
|
|
} g_cmdoptions[] = {
|
|
{ "-h", 0, CMD_HELP },
|
|
{ "-fb", 1, CMD_FB },
|
|
{ "-db", 1, CMD_DB },
|
|
{ "-a", 0, CMD_ALL },
|
|
{ "-i", 0, CMD_INFO },
|
|
{ "-g", 5, CMD_GEOMETRY },
|
|
{ "-t", 7, CMD_TIMING },
|
|
{ "-accel", 1, CMD_ACCEL },
|
|
{ "-hsync", 1, CMD_HSYNC },
|
|
{ "-vsync", 1, CMD_VSYNC },
|
|
{ "-laced", 1, CMD_LACED },
|
|
{ "-double", 1, CMD_DOUBLE },
|
|
|
|
#ifdef BB_FBSET_FANCY
|
|
{ "--help", 0, CMD_HELP },
|
|
{ "-all", 0, CMD_ALL },
|
|
{ "-xres", 1, CMD_XRES },
|
|
{ "-yres", 1, CMD_YRES },
|
|
{ "-vxres", 1, CMD_VXRES },
|
|
{ "-vyres", 1, CMD_VYRES },
|
|
{ "-depth", 1, CMD_DEPTH },
|
|
{ "-match", 0, CMD_MATCH },
|
|
{ "--geometry", 5, CMD_GEOMETRY },
|
|
|
|
{ "-pixclock", 1, CMD_PIXCLOCK },
|
|
{ "-left", 1, CMD_LEFT },
|
|
{ "-right", 1, CMD_RIGHT },
|
|
{ "-upper", 1, CMD_UPPER },
|
|
{ "-lower", 1, CMD_LOWER },
|
|
{ "-hslen", 1, CMD_HSLEN },
|
|
{ "-vslen", 1, CMD_VSLEN },
|
|
{ "--timings", 7, CMD_TIMING },
|
|
|
|
{ "-csync", 1, CMD_CSYNC },
|
|
{ "-gsync", 1, CMD_GSYNC },
|
|
{ "-extsync", 1, CMD_EXTSYNC },
|
|
{ "-bcast", 1, CMD_BCAST },
|
|
{ "-rgba", 1, CMD_RGBA },
|
|
{ "-step", 1, CMD_STEP },
|
|
{ "-move", 1, CMD_MOVE },
|
|
#endif
|
|
{ 0, 0, 0 }
|
|
};
|
|
|
|
static int readmode(struct fb_var_screeninfo *base, const char *fn,
|
|
const char *mode)
|
|
{
|
|
#ifdef BB_FBSET_READMODE
|
|
FILE *f;
|
|
char buf[256];
|
|
char *p = buf;
|
|
|
|
if ((f = fopen(fn, "r")) == NULL) PERROR("readmode(fopen)");
|
|
while (!feof(f)) {
|
|
fgets(buf, sizeof(buf), f);
|
|
if ((p = strstr(buf, "mode ")) || (p = strstr(buf, "mode\t"))) {
|
|
p += 5;
|
|
if ((p = strstr(buf, mode))) {
|
|
p += strlen(mode);
|
|
if (!isspace(*p) && (*p != 0) && (*p != '"') && (*p != '\r')
|
|
&& (*p != '\n')) continue; /* almost, but not quite */
|
|
while (!feof(f)) {
|
|
fgets(buf, sizeof(buf), f);
|
|
if (!strstr(buf, "endmode")) return 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#else
|
|
fprintf(stderr, "W: mode reading was disabled on this copy of fbset; ignoring request\n");
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static void setmode(struct fb_var_screeninfo *base,
|
|
struct fb_var_screeninfo *set)
|
|
{
|
|
if ((int)set->xres > 0) base->xres = set->xres;
|
|
if ((int)set->yres > 0) base->yres = set->yres;
|
|
if ((int)set->xres_virtual > 0) base->xres_virtual = set->xres_virtual;
|
|
if ((int)set->yres_virtual > 0) base->yres_virtual = set->yres_virtual;
|
|
if ((int)set->bits_per_pixel > 0) base->bits_per_pixel = set->bits_per_pixel;
|
|
}
|
|
|
|
static void showmode(struct fb_var_screeninfo *v)
|
|
{
|
|
double drate = 0, hrate = 0, vrate = 0;
|
|
if (v->pixclock) {
|
|
drate = 1e12 / v->pixclock;
|
|
hrate = drate / (v->left_margin+v->xres+v->right_margin+v->hsync_len);
|
|
vrate = hrate / (v->upper_margin+v->yres+v->lower_margin+v->vsync_len);
|
|
}
|
|
printf("\nmode \"%ux%u-%u\"\n", v->xres, v->yres, (int)(vrate+0.5));
|
|
#ifdef BB_FBSET_FANCY
|
|
printf("\t# D: %.3f MHz, H: %.3f kHz, V: %.3f Hz\n", drate/1e6, hrate/1e3,
|
|
vrate);
|
|
#endif
|
|
printf("\tgeometry %u %u %u %u %u\n", v->xres, v->yres,
|
|
v->xres_virtual, v->yres_virtual, v->bits_per_pixel);
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
|
|
printf("\ttimings %u %u %u %u %u %u %u\n", v->pixclock, v->left_margin,
|
|
v->right_margin, v->upper_margin, v->lower_margin, v->hsync_len,
|
|
v->vsync_len);
|
|
printf("\taccel %s\n", (v->accel_flags > 0 ? "true" : "false"));
|
|
#else
|
|
printf("\ttimings %lu %lu %lu %lu %lu %lu %lu\n", v->pixclock, v->left_margin,
|
|
v->right_margin, v->upper_margin, v->lower_margin, v->hsync_len,
|
|
v->vsync_len);
|
|
#endif
|
|
printf("\trgba %u/%u,%u/%u,%u/%u,%u/%u\n", v->red.length, v->red.offset,
|
|
v->green.length, v->green.offset, v->blue.length, v->blue.offset,
|
|
v->transp.length, v->transp.offset);
|
|
printf("endmode\n");
|
|
}
|
|
|
|
static void fbset_usage(void)
|
|
{
|
|
int i;
|
|
#ifndef STANDALONE
|
|
fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n", BB_VER, BB_BT);
|
|
#endif
|
|
fprintf(stderr, "Usage: fbset [options] [mode]\n");
|
|
fprintf(stderr, "\tThe following options are recognized:\n");
|
|
for (i = 0; g_cmdoptions[i].name; i++)
|
|
fprintf(stderr, "\t\t%s\n", g_cmdoptions[i].name);
|
|
exit(-1);
|
|
}
|
|
|
|
#ifdef STANDALONE
|
|
int main(int argc, char **argv)
|
|
#else
|
|
extern int fbset_main(int argc, char **argv)
|
|
#endif
|
|
{
|
|
struct fb_var_screeninfo var, varset;
|
|
int fh, i;
|
|
char *fbdev = DEFAULTFBDEV;
|
|
char *modefile = DEFAULTFBMODE;
|
|
char *thisarg, *mode = NULL;
|
|
|
|
memset(&varset, 0xFF, sizeof(varset));
|
|
|
|
/* parse cmd args.... why do they have to make things so difficult? */
|
|
argv++; argc--;
|
|
for (; argc > 0 && (thisarg = *argv); argc--, argv++) {
|
|
for (i = 0; g_cmdoptions[i].name; i++) {
|
|
if (!strcmp(thisarg, g_cmdoptions[i].name)) {
|
|
if (argc - 1 < g_cmdoptions[i].param_count) fbset_usage();
|
|
switch (g_cmdoptions[i].code) {
|
|
case CMD_HELP: fbset_usage();
|
|
case CMD_FB: fbdev = argv[1]; break;
|
|
case CMD_DB: modefile = argv[1]; break;
|
|
case CMD_GEOMETRY:
|
|
varset.xres = strtoul(argv[1],0,0);
|
|
varset.yres = strtoul(argv[2],0,0);
|
|
varset.xres_virtual = strtoul(argv[3],0,0);
|
|
varset.yres_virtual = strtoul(argv[4],0,0);
|
|
varset.bits_per_pixel = strtoul(argv[5],0,0);
|
|
break;
|
|
case CMD_TIMING:
|
|
varset.pixclock = strtoul(argv[1],0,0);
|
|
varset.left_margin = strtoul(argv[2],0,0);
|
|
varset.right_margin = strtoul(argv[3],0,0);
|
|
varset.upper_margin = strtoul(argv[4],0,0);
|
|
varset.lower_margin = strtoul(argv[5],0,0);
|
|
varset.hsync_len = strtoul(argv[6],0,0);
|
|
varset.vsync_len = strtoul(argv[7],0,0);
|
|
break;
|
|
#ifdef BB_FBSET_FANCY
|
|
case CMD_XRES: varset.xres = strtoul(argv[1],0,0); break;
|
|
case CMD_YRES: varset.yres = strtoul(argv[1],0,0); break;
|
|
#endif
|
|
}
|
|
argc -= g_cmdoptions[i].param_count;
|
|
argv += g_cmdoptions[i].param_count;
|
|
break;
|
|
}
|
|
}
|
|
if (!g_cmdoptions[i].name) {
|
|
if (argc == 1) {
|
|
mode = *argv;
|
|
g_options |= OPT_READMODE;
|
|
} else {
|
|
fbset_usage();
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((fh = open(fbdev, O_RDONLY)) < 0) PERROR("fbset(open)");
|
|
if (ioctl(fh, FBIOGET_VSCREENINFO, &var)) PERROR("fbset(ioctl)");
|
|
if (g_options & OPT_READMODE) {
|
|
if (!readmode(&var, modefile, mode)) {
|
|
fprintf(stderr, "Unknown video mode `%s'\n", mode);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
setmode(&var, &varset);
|
|
if (g_options & OPT_CHANGE)
|
|
if (ioctl(fh, FBIOPUT_VSCREENINFO, &var)) PERROR("fbset(ioctl)");
|
|
showmode(&var);
|
|
close(fh);
|
|
|
|
return(TRUE);
|
|
}
|
|
|