| /* 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 "busybox.h" |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <ctype.h> |
| #include <sys/ioctl.h> |
| |
| #define PERROR(ctx) do { perror(ctx); exit(1); } while(0) |
| |
| #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 |
| #define CMD_CHANGE 13 |
| |
| #ifdef BB_FEATURE_FBSET_FANCY |
| #define CMD_XRES 100 |
| #define CMD_YRES 101 |
| #define CMD_VXRES 102 |
| #define CMD_VYRES 103 |
| #define CMD_DEPTH 104 |
| #define CMD_MATCH 105 |
| #define CMD_PIXCLOCK 106 |
| #define CMD_LEFT 107 |
| #define CMD_RIGHT 108 |
| #define CMD_UPPER 109 |
| #define CMD_LOWER 110 |
| #define CMD_HSLEN 111 |
| #define CMD_VSLEN 112 |
| #define CMD_CSYNC 113 |
| #define CMD_GSYNC 114 |
| #define CMD_EXTSYNC 115 |
| #define CMD_BCAST 116 |
| #define CMD_RGBA 117 |
| #define CMD_STEP 118 |
| #define CMD_MOVE 119 |
| #endif |
| |
| static unsigned int g_options = 0; |
| |
| /* Stuff stolen from the kernel's fb.h */ |
| #define FBIOGET_VSCREENINFO 0x4600 |
| #define FBIOPUT_VSCREENINFO 0x4601 |
| #define __u32 unsigned int |
| 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 */ |
| }; |
| |
| |
| 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}, { |
| "-help", 0, CMD_HELP}, { |
| "-n", 0, CMD_CHANGE}, { |
| #ifdef BB_FEATURE_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_FEATURE_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 ((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 |
| errorMsg( "mode reading not compiled in\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_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"); |
| } |
| |
| static void fbset_usage(void) |
| { |
| #ifndef BB_FEATURE_TRIVIAL_HELP |
| int i; |
| #endif |
| |
| #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"); |
| #ifndef BB_FEATURE_TRIVIAL_HELP |
| fprintf(stderr, "\nShows and modifies frame buffer device settings\n\n"); |
| fprintf(stderr, "The following options are recognized:\n"); |
| for (i = 0; g_cmdoptions[i].name; i++) |
| fprintf(stderr, "\t%s\n", g_cmdoptions[i].name); |
| #endif |
| 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; |
| 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 { |
| 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)) { |
| errorMsg("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); |
| /* Don't close the file, as exiting will take care of that */ |
| /* close(fh); */ |
| |
| return (TRUE); |
| } |
