fbset.c - fp2-dev/platform/external/busybox - Gitiles

 /*
  * 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);
 }
	/*
	* 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);
	}