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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 | /* vi: set sw=4 ts=4: */ /* * Mini fbset implementation for busybox * * Copyright (C) 1999 by Randolph Chung <tausq@debian.org> * * Licensed under GPLv2 or later, see file LICENSE in this source tree. * * 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 "libbb.h" #define DEFAULTFBDEV FB_0 #define DEFAULTFBMODE "/etc/fb.modes" /* Stuff stolen from the kernel's fb.h */ #define FB_ACTIVATE_ALL 64 enum { FBIOGET_VSCREENINFO = 0x4600, FBIOPUT_VSCREENINFO = 0x4601 }; struct fb_bitfield { uint32_t offset; /* beginning of bitfield */ uint32_t length; /* length of bitfield */ uint32_t msb_right; /* !=0: Most significant bit is right */ }; struct fb_var_screeninfo { uint32_t xres; /* visible resolution */ uint32_t yres; uint32_t xres_virtual; /* virtual resolution */ uint32_t yres_virtual; uint32_t xoffset; /* offset from virtual to visible */ uint32_t yoffset; /* resolution */ uint32_t bits_per_pixel; uint32_t 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 */ uint32_t nonstd; /* !=0 Non standard pixel format */ uint32_t activate; /* see FB_ACTIVATE_x */ uint32_t height; /* height of picture in mm */ uint32_t width; /* width of picture in mm */ uint32_t accel_flags; /* acceleration flags (hints) */ /* Timing: All values in pixclocks, except pixclock (of course) */ uint32_t pixclock; /* pixel clock in ps (pico seconds) */ uint32_t left_margin; /* time from sync to picture */ uint32_t right_margin; /* time from picture to sync */ uint32_t upper_margin; /* time from sync to picture */ uint32_t lower_margin; uint32_t hsync_len; /* length of horizontal sync */ uint32_t vsync_len; /* length of vertical sync */ uint32_t sync; /* see FB_SYNC_x */ uint32_t vmode; /* see FB_VMODE_x */ uint32_t reserved[6]; /* Reserved for future compatibility */ }; static void copy_if_gt0(uint32_t *src, uint32_t *dst, unsigned cnt) { do { if ((int32_t) *src > 0) *dst = *src; src++; dst++; } while (--cnt); } static NOINLINE void copy_changed_values( struct fb_var_screeninfo *base, struct fb_var_screeninfo *set) { //if ((int32_t) set->xres > 0) base->xres = set->xres; //if ((int32_t) set->yres > 0) base->yres = set->yres; //if ((int32_t) set->xres_virtual > 0) base->xres_virtual = set->xres_virtual; //if ((int32_t) set->yres_virtual > 0) base->yres_virtual = set->yres_virtual; copy_if_gt0(&set->xres, &base->xres, 4); if ((int32_t) set->bits_per_pixel > 0) base->bits_per_pixel = set->bits_per_pixel; //copy_if_gt0(&set->bits_per_pixel, &base->bits_per_pixel, 1); //if ((int32_t) set->pixclock > 0) base->pixclock = set->pixclock; //if ((int32_t) set->left_margin > 0) base->left_margin = set->left_margin; //if ((int32_t) set->right_margin > 0) base->right_margin = set->right_margin; //if ((int32_t) set->upper_margin > 0) base->upper_margin = set->upper_margin; //if ((int32_t) set->lower_margin > 0) base->lower_margin = set->lower_margin; //if ((int32_t) set->hsync_len > 0) base->hsync_len = set->hsync_len; //if ((int32_t) set->vsync_len > 0) base->vsync_len = set->vsync_len; //if ((int32_t) set->sync > 0) base->sync = set->sync; //if ((int32_t) set->vmode > 0) base->vmode = set->vmode; copy_if_gt0(&set->pixclock, &base->pixclock, 9); } 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_SHOW = 13, CMD_CHANGE = 14, #if ENABLE_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 const struct cmdoptions_t { const char name[9]; const unsigned char param_count; const unsigned char code; } g_cmdoptions[] = { /*"12345678" + NUL */ { "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 }, { "show" , 0, CMD_SHOW }, { "s" , 0, CMD_SHOW }, #if ENABLE_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 }; /* taken from linux/fb.h */ enum { FB_SYNC_HOR_HIGH_ACT = 1, /* horizontal sync high active */ FB_SYNC_VERT_HIGH_ACT = 2, /* vertical sync high active */ #if ENABLE_FEATURE_FBSET_READMODE FB_VMODE_INTERLACED = 1, /* interlaced */ FB_VMODE_DOUBLE = 2, /* double scan */ FB_SYNC_EXT = 4, /* external sync */ FB_SYNC_COMP_HIGH_ACT = 8, /* composite sync high active */ #endif }; #if ENABLE_FEATURE_FBSET_READMODE static void ss(uint32_t *x, uint32_t flag, char *buf, const char *what) { if (strcmp(buf, what) == 0) *x &= ~flag; else *x |= flag; } /* Mode db file contains mode definitions like this: * mode "800x600-48-lace" * # D: 36.00 MHz, H: 33.835 kHz, V: 96.39 Hz * geometry 800 600 800 600 8 * timings 27778 56 80 79 11 128 12 * laced true * hsync high * vsync high * endmode */ static int read_mode_db(struct fb_var_screeninfo *base, const char *fn, const char *mode) { char *token[2], *p, *s; parser_t *parser = config_open(fn); while (config_read(parser, token, 2, 1, "# \t\r", PARSE_NORMAL)) { if (strcmp(token[0], "mode") != 0 || !token[1]) continue; p = strstr(token[1], mode); if (!p) continue; s = p + strlen(mode); //bb_info_msg("CHECK[%s][%s][%d]", mode, p-1, *s); /* exact match? */ if (((!*s || isspace(*s)) && '"' != s[-1]) /* end-of-token */ || ('"' == *s && '"' == p[-1]) /* ends with " but starts with " too! */ ) { //bb_info_msg("FOUND[%s][%s][%s][%d]", token[1], p, mode, isspace(*s)); break; } } if (!token[0]) return 0; while (config_read(parser, token, 2, 1, "# \t", PARSE_NORMAL)) { int i; //bb_info_msg("???[%s][%s]", token[0], token[1]); if (strcmp(token[0], "endmode") == 0) { //bb_info_msg("OK[%s]", mode); return 1; } p = token[1]; i = index_in_strings( "geometry\0timings\0interlaced\0double\0vsync\0hsync\0csync\0extsync\0", token[0]); switch (i) { case 0: if (sizeof(int) == sizeof(base->xres)) { sscanf(p, "%d %d %d %d %d", &base->xres, &base->yres, &base->xres_virtual, &base->yres_virtual, &base->bits_per_pixel); } else { int base_xres, base_yres; int base_xres_virtual, base_yres_virtual; int base_bits_per_pixel; sscanf(p, "%d %d %d %d %d", &base_xres, &base_yres, &base_xres_virtual, &base_yres_virtual, &base_bits_per_pixel); base->xres = base_xres; base->yres = base_yres; base->xres_virtual = base_xres_virtual; base->yres_virtual = base_yres_virtual; base->bits_per_pixel = base_bits_per_pixel; } //bb_info_msg("GEO[%s]", p); break; case 1: if (sizeof(int) == sizeof(base->xres)) { 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 { int base_pixclock; int base_left_margin, base_right_margin; int base_upper_margin, base_lower_margin; int base_hsync_len, base_vsync_len; 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); base->pixclock = base_pixclock; base->left_margin = base_left_margin; base->right_margin = base_right_margin; base->upper_margin = base_upper_margin; base->lower_margin = base_lower_margin; base->hsync_len = base_hsync_len; base->vsync_len = base_vsync_len; } //bb_info_msg("TIM[%s]", p); break; case 2: case 3: { static const uint32_t syncs[] = {FB_VMODE_INTERLACED, FB_VMODE_DOUBLE}; ss(&base->vmode, syncs[i-2], p, "false"); //bb_info_msg("VMODE[%s]", p); break; } case 4: case 5: case 6: { static const uint32_t syncs[] = {FB_SYNC_VERT_HIGH_ACT, FB_SYNC_HOR_HIGH_ACT, FB_SYNC_COMP_HIGH_ACT}; ss(&base->sync, syncs[i-4], p, "low"); //bb_info_msg("SYNC[%s]", p); break; } case 7: ss(&base->sync, FB_SYNC_EXT, p, "false"); //bb_info_msg("EXTSYNC[%s]", p); break; } } return 0; } #endif static NOINLINE 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" #if ENABLE_FEATURE_FBSET_FANCY "\t# D: %.3f MHz, H: %.3f kHz, V: %.3f Hz\n" #endif "\tgeometry %u %u %u %u %u\n" "\ttimings %u %u %u %u %u %u %u\n" "\taccel %s\n" "\trgba %u/%u,%u/%u,%u/%u,%u/%u\n" "endmode\n\n", v->xres, v->yres, (int) (vrate + 0.5), #if ENABLE_FEATURE_FBSET_FANCY drate / 1e6, hrate / 1e3, vrate, #endif v->xres, v->yres, v->xres_virtual, v->yres_virtual, v->bits_per_pixel, v->pixclock, v->left_margin, v->right_margin, v->upper_margin, v->lower_margin, v->hsync_len, v->vsync_len, (v->accel_flags > 0 ? "true" : "false"), v->red.length, v->red.offset, v->green.length, v->green.offset, v->blue.length, v->blue.offset, v->transp.length, v->transp.offset); } int fbset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int fbset_main(int argc, char **argv) { enum { OPT_CHANGE = (1 << 0), OPT_SHOW = (1 << 1), OPT_READMODE = (1 << 2), OPT_ALL = (1 << 9), }; struct fb_var_screeninfo var_old, var_set; int fh, i; unsigned options = 0; const char *fbdev = DEFAULTFBDEV; const char *modefile = DEFAULTFBMODE; char *thisarg; char *mode = mode; /* for compiler */ memset(&var_set, 0xff, sizeof(var_set)); /* set all to -1 */ /* parse cmd args.... why do they have to make things so difficult? */ argv++; argc--; for (; argc > 0 && (thisarg = *argv) != NULL; argc--, argv++) { if (thisarg[0] == '-') for (i = 0; i < ARRAY_SIZE(g_cmdoptions); i++) { if (strcmp(thisarg + 1, g_cmdoptions[i].name) != 0) continue; if (argc <= g_cmdoptions[i].param_count) bb_show_usage(); switch (g_cmdoptions[i].code) { case CMD_FB: fbdev = argv[1]; break; case CMD_DB: modefile = argv[1]; break; case CMD_ALL: options |= OPT_ALL; break; case CMD_SHOW: options |= OPT_SHOW; break; case CMD_GEOMETRY: var_set.xres = xatou32(argv[1]); var_set.yres = xatou32(argv[2]); var_set.xres_virtual = xatou32(argv[3]); var_set.yres_virtual = xatou32(argv[4]); var_set.bits_per_pixel = xatou32(argv[5]); break; case CMD_TIMING: var_set.pixclock = xatou32(argv[1]); var_set.left_margin = xatou32(argv[2]); var_set.right_margin = xatou32(argv[3]); var_set.upper_margin = xatou32(argv[4]); var_set.lower_margin = xatou32(argv[5]); var_set.hsync_len = xatou32(argv[6]); var_set.vsync_len = xatou32(argv[7]); break; case CMD_ACCEL: break; case CMD_HSYNC: var_set.sync |= FB_SYNC_HOR_HIGH_ACT; break; case CMD_VSYNC: var_set.sync |= FB_SYNC_VERT_HIGH_ACT; break; #if ENABLE_FEATURE_FBSET_FANCY case CMD_XRES: var_set.xres = xatou32(argv[1]); break; case CMD_YRES: var_set.yres = xatou32(argv[1]); break; case CMD_DEPTH: var_set.bits_per_pixel = xatou32(argv[1]); break; #endif } switch (g_cmdoptions[i].code) { case CMD_FB: case CMD_DB: case CMD_ALL: case CMD_SHOW: break; default: /* other commands imply changes */ options |= OPT_CHANGE; } argc -= g_cmdoptions[i].param_count; argv += g_cmdoptions[i].param_count; goto contin; } if (!ENABLE_FEATURE_FBSET_READMODE || argc != 1) bb_show_usage(); mode = *argv; options |= OPT_READMODE; contin: ; } fh = xopen(fbdev, O_RDONLY); xioctl(fh, FBIOGET_VSCREENINFO, &var_old); if (options & OPT_READMODE) { #if ENABLE_FEATURE_FBSET_READMODE if (!read_mode_db(&var_old, modefile, mode)) { bb_error_msg_and_die("unknown video mode '%s'", mode); } #endif } if (options & OPT_CHANGE) { copy_changed_values(&var_old, &var_set); if (options & OPT_ALL) var_old.activate = FB_ACTIVATE_ALL; xioctl(fh, FBIOPUT_VSCREENINFO, &var_old); } if (options == 0 || (options & OPT_SHOW)) showmode(&var_old); if (ENABLE_FEATURE_CLEAN_UP) close(fh); return EXIT_SUCCESS; } |