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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 | /* 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 <string.h> #include <sys/ioctl.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_HELP = 0, 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 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} }; #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; if ((f = fopen(fn, "r")) == NULL) perror_msg_and_die("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 error_msg( "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_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'\n", 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; } |