diff options
Diffstat (limited to 'fbset.c')
| -rw-r--r-- | fbset.c | 424 |
1 files changed, 0 insertions, 424 deletions
diff --git a/fbset.c b/fbset.c deleted file mode 100644 index 5ccd80e..0000000 --- a/fbset.c +++ /dev/null @@ -1,424 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * 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 <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <fcntl.h> -#include <errno.h> -#include <ctype.h> -#include <string.h> -#include <sys/ioctl.h> -#include "busybox.h" - -#define DEFAULTFBDEV "/dev/fb0" -#define DEFAULTFBMODE "/etc/fb.modes" - -static const int OPT_CHANGE = (1 << 0); -static const int OPT_INFO = (1 << 1); -static const int OPT_READMODE = (1 << 2); - -enum { - CMD_FB = 1, - CMD_DB = 2, - CMD_GEOMETRY = 3, - CMD_TIMING = 4, - CMD_ACCEL = 5, - CMD_HSYNC = 6, - CMD_VSYNC = 7, - CMD_LACED = 8, - CMD_DOUBLE = 9, -/* CMD_XCOMPAT = 10, */ - CMD_ALL = 11, - CMD_INFO = 12, - CMD_CHANGE = 13, - -#ifdef BB_FEATURE_FBSET_FANCY - CMD_XRES = 100, - CMD_YRES = 101, - CMD_VXRES = 102, - CMD_VYRES = 103, - CMD_DEPTH = 104, - CMD_MATCH = 105, - CMD_PIXCLOCK = 106, - CMD_LEFT = 107, - CMD_RIGHT = 108, - CMD_UPPER = 109, - CMD_LOWER = 110, - CMD_HSLEN = 111, - CMD_VSLEN = 112, - CMD_CSYNC = 113, - CMD_GSYNC = 114, - CMD_EXTSYNC = 115, - CMD_BCAST = 116, - CMD_RGBA = 117, - CMD_STEP = 118, - CMD_MOVE = 119, -#endif -}; - -static unsigned int g_options = 0; - -/* Stuff stolen from the kernel's fb.h */ -static const int FBIOGET_VSCREENINFO = 0x4600; -static const int FBIOPUT_VSCREENINFO = 0x4601; -#define __u32 u_int32_t -struct fb_bitfield { - __u32 offset; /* beginning of bitfield */ - __u32 length; /* length of bitfield */ - __u32 msb_right; /* != 0 : Most significant bit is */ - /* right */ -}; -struct fb_var_screeninfo { - __u32 xres; /* visible resolution */ - __u32 yres; - __u32 xres_virtual; /* virtual resolution */ - __u32 yres_virtual; - __u32 xoffset; /* offset from virtual to visible */ - __u32 yoffset; /* resolution */ - - __u32 bits_per_pixel; /* guess what */ - __u32 grayscale; /* != 0 Graylevels instead of colors */ - - struct fb_bitfield red; /* bitfield in fb mem if true color, */ - struct fb_bitfield green; /* else only length is significant */ - struct fb_bitfield blue; - struct fb_bitfield transp; /* transparency */ - - __u32 nonstd; /* != 0 Non standard pixel format */ - - __u32 activate; /* see FB_ACTIVATE_* */ - - __u32 height; /* height of picture in mm */ - __u32 width; /* width of picture in mm */ - - __u32 accel_flags; /* acceleration flags (hints) */ - - /* Timing: All values in pixclocks, except pixclock (of course) */ - __u32 pixclock; /* pixel clock in ps (pico seconds) */ - __u32 left_margin; /* time from sync to picture */ - __u32 right_margin; /* time from picture to sync */ - __u32 upper_margin; /* time from sync to picture */ - __u32 lower_margin; - __u32 hsync_len; /* length of horizontal sync */ - __u32 vsync_len; /* length of vertical sync */ - __u32 sync; /* see FB_SYNC_* */ - __u32 vmode; /* see FB_VMODE_* */ - __u32 reserved[6]; /* Reserved for future compatibility */ -}; - - -static struct cmdoptions_t { - char *name; - unsigned char param_count; - unsigned char code; -} g_cmdoptions[] = { - { - "-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}, { - "-n", 0, CMD_CHANGE}, { -#ifdef BB_FEATURE_FBSET_FANCY - "-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} -}; - -#ifdef BB_FEATURE_FBSET_READMODE -/* taken from linux/fb.h */ -static const int FB_VMODE_INTERLACED = 1; /* interlaced */ -static const int FB_VMODE_DOUBLE = 2; /* double scan */ -static const int FB_SYNC_HOR_HIGH_ACT = 1; /* horizontal sync high active */ -static const int FB_SYNC_VERT_HIGH_ACT = 2; /* vertical sync high active */ -static const int FB_SYNC_EXT = 4; /* external sync */ -static const int FB_SYNC_COMP_HIGH_ACT = 8; /* composite sync high active */ -#endif -static int readmode(struct fb_var_screeninfo *base, const char *fn, - const char *mode) -{ -#ifdef BB_FEATURE_FBSET_READMODE - FILE *f; - char buf[256]; - char *p = buf; - - f = xfopen(fn, "r"); - 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 ((p = strstr(buf, "geometry "))) { - p += 9; - - sscanf(p, "%d %d %d %d %d", - &(base->xres), &(base->yres), - &(base->xres_virtual), &(base->yres_virtual), - &(base->bits_per_pixel)); - } else if ((p = strstr(buf, "timings "))) { - p += 8; - - sscanf(p, "%d %d %d %d %d %d %d", - &(base->pixclock), - &(base->left_margin), &(base->right_margin), - &(base->upper_margin), &(base->lower_margin), - &(base->hsync_len), &(base->vsync_len)); - } else if ((p = strstr(buf, "laced "))) { - p += 6; - - if (strstr(buf, "false")) { - base->vmode &= ~FB_VMODE_INTERLACED; - } else { - base->vmode |= FB_VMODE_INTERLACED; - } - } else if ((p = strstr(buf, "double "))) { - p += 7; - - if (strstr(buf, "false")) { - base->vmode &= ~FB_VMODE_DOUBLE; - } else { - base->vmode |= FB_VMODE_DOUBLE; - } - } else if ((p = strstr(buf, "vsync "))) { - p += 6; - - if (strstr(buf, "low")) { - base->sync &= ~FB_SYNC_VERT_HIGH_ACT; - } else { - base->sync |= FB_SYNC_VERT_HIGH_ACT; - } - } else if ((p = strstr(buf, "hsync "))) { - p += 6; - - if (strstr(buf, "low")) { - base->sync &= ~FB_SYNC_HOR_HIGH_ACT; - } else { - base->sync |= FB_SYNC_HOR_HIGH_ACT; - } - } else if ((p = strstr(buf, "csync "))) { - p += 6; - - if (strstr(buf, "low")) { - base->sync &= ~FB_SYNC_COMP_HIGH_ACT; - } else { - base->sync |= FB_SYNC_COMP_HIGH_ACT; - } - } else if ((p = strstr(buf, "extsync "))) { - p += 8; - - if (strstr(buf, "false")) { - base->sync &= ~FB_SYNC_EXT; - } else { - base->sync |= FB_SYNC_EXT; - } - } - - if (strstr(buf, "endmode")) - return 1; - } - } - } - } -#else - error_msg( "mode reading not compiled in"); -#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_FEATURE_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); - 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")); - 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\n"); -} - -#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) - show_usage(); - switch (g_cmdoptions[i].code) { - 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; - case CMD_CHANGE: - g_options |= OPT_CHANGE; - break; -#ifdef BB_FEATURE_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 { - show_usage(); - } - } - } - - if ((fh = open(fbdev, O_RDONLY)) < 0) - perror_msg_and_die("fbset(open)"); - if (ioctl(fh, FBIOGET_VSCREENINFO, &var)) - perror_msg_and_die("fbset(ioctl)"); - if (g_options & OPT_READMODE) { - if (!readmode(&var, modefile, mode)) { - error_msg("Unknown video mode `%s'", mode); - return EXIT_FAILURE; - } - } - - setmode(&var, &varset); - if (g_options & OPT_CHANGE) - if (ioctl(fh, FBIOPUT_VSCREENINFO, &var)) - perror_msg_and_die("fbset(ioctl)"); - showmode(&var); - /* Don't close the file, as exiting will take care of that */ - /* close(fh); */ - - return EXIT_SUCCESS; -} |