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Changes for kernel and Busybox
[tomato.git] / release / src / router / busybox / util-linux / fbset.c
blob196c2aa24ba662db631d14ca13a4a85daea6a161
1 /* vi: set sw=4 ts=4: */
2 /*
3 * Mini fbset implementation for busybox
4 *
5 * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
8 *
9 * This is a from-scratch implementation of fbset; but the de facto fbset
10 * implementation was a good reference. fbset (original) is released under
11 * the GPL, and is (c) 1995-1999 by:
12 * Geert Uytterhoeven (Geert.Uytterhoeven@cs.kuleuven.ac.be)
13 */
14
15 //usage:#define fbset_trivial_usage
16 //usage: "[OPTIONS] [MODE]"
17 //usage:#define fbset_full_usage "\n\n"
18 //usage: "Show and modify frame buffer settings"
19 //usage:
20 //usage:#define fbset_example_usage
21 //usage: "$ fbset\n"
22 //usage: "mode \"1024x768-76\"\n"
23 //usage: " # D: 78.653 MHz, H: 59.949 kHz, V: 75.694 Hz\n"
24 //usage: " geometry 1024 768 1024 768 16\n"
25 //usage: " timings 12714 128 32 16 4 128 4\n"
26 //usage: " accel false\n"
27 //usage: " rgba 5/11,6/5,5/0,0/0\n"
28 //usage: "endmode\n"
29
30 #include "libbb.h"
31
32 #define DEFAULTFBDEV FB_0
33 #define DEFAULTFBMODE "/etc/fb.modes"
34
35 /* Stuff stolen from the kernel's fb.h */
36 #define FB_ACTIVATE_ALL 64
37 enum {
38 FBIOGET_VSCREENINFO = 0x4600,
39 FBIOPUT_VSCREENINFO = 0x4601
40 };
41
42 struct fb_bitfield {
43 uint32_t offset; /* beginning of bitfield */
44 uint32_t length; /* length of bitfield */
45 uint32_t msb_right; /* !=0: Most significant bit is right */
46 };
47 struct fb_var_screeninfo {
48 uint32_t xres; /* visible resolution */
49 uint32_t yres;
50 uint32_t xres_virtual; /* virtual resolution */
51 uint32_t yres_virtual;
52 uint32_t xoffset; /* offset from virtual to visible */
53 uint32_t yoffset; /* resolution */
54
55 uint32_t bits_per_pixel;
56 uint32_t grayscale; /* !=0 Graylevels instead of colors */
57
58 struct fb_bitfield red; /* bitfield in fb mem if true color, */
59 struct fb_bitfield green; /* else only length is significant */
60 struct fb_bitfield blue;
61 struct fb_bitfield transp; /* transparency */
62
63 uint32_t nonstd; /* !=0 Non standard pixel format */
64
65 uint32_t activate; /* see FB_ACTIVATE_x */
66
67 uint32_t height; /* height of picture in mm */
68 uint32_t width; /* width of picture in mm */
69
70 uint32_t accel_flags; /* acceleration flags (hints) */
71
72 /* Timing: All values in pixclocks, except pixclock (of course) */
73 uint32_t pixclock; /* pixel clock in ps (pico seconds) */
74 uint32_t left_margin; /* time from sync to picture */
75 uint32_t right_margin; /* time from picture to sync */
76 uint32_t upper_margin; /* time from sync to picture */
77 uint32_t lower_margin;
78 uint32_t hsync_len; /* length of horizontal sync */
79 uint32_t vsync_len; /* length of vertical sync */
80 uint32_t sync; /* see FB_SYNC_x */
81 uint32_t vmode; /* see FB_VMODE_x */
82 uint32_t reserved[6]; /* Reserved for future compatibility */
83 };
84
85 static void copy_if_gt0(uint32_t *src, uint32_t *dst, unsigned cnt)
86 {
87 do {
88 if ((int32_t) *src > 0)
89 *dst = *src;
90 src++;
91 dst++;
92 } while (--cnt);
93 }
94
95 static NOINLINE void copy_changed_values(
96 struct fb_var_screeninfo *base,
97 struct fb_var_screeninfo *set)
98 {
99 //if ((int32_t) set->xres > 0) base->xres = set->xres;
100 //if ((int32_t) set->yres > 0) base->yres = set->yres;
101 //if ((int32_t) set->xres_virtual > 0) base->xres_virtual = set->xres_virtual;
102 //if ((int32_t) set->yres_virtual > 0) base->yres_virtual = set->yres_virtual;
103 copy_if_gt0(&set->xres, &base->xres, 4);
104
105 if ((int32_t) set->bits_per_pixel > 0) base->bits_per_pixel = set->bits_per_pixel;
106 //copy_if_gt0(&set->bits_per_pixel, &base->bits_per_pixel, 1);
107
108 //if ((int32_t) set->pixclock > 0) base->pixclock = set->pixclock;
109 //if ((int32_t) set->left_margin > 0) base->left_margin = set->left_margin;
110 //if ((int32_t) set->right_margin > 0) base->right_margin = set->right_margin;
111 //if ((int32_t) set->upper_margin > 0) base->upper_margin = set->upper_margin;
112 //if ((int32_t) set->lower_margin > 0) base->lower_margin = set->lower_margin;
113 //if ((int32_t) set->hsync_len > 0) base->hsync_len = set->hsync_len;
114 //if ((int32_t) set->vsync_len > 0) base->vsync_len = set->vsync_len;
115 //if ((int32_t) set->sync > 0) base->sync = set->sync;
116 //if ((int32_t) set->vmode > 0) base->vmode = set->vmode;
117 copy_if_gt0(&set->pixclock, &base->pixclock, 9);
118 }
119
120
121 enum {
122 CMD_FB = 1,
123 CMD_DB = 2,
124 CMD_GEOMETRY = 3,
125 CMD_TIMING = 4,
126 CMD_ACCEL = 5,
127 CMD_HSYNC = 6,
128 CMD_VSYNC = 7,
129 CMD_LACED = 8,
130 CMD_DOUBLE = 9,
131 /* CMD_XCOMPAT = 10, */
132 CMD_ALL = 11,
133 CMD_INFO = 12,
134 CMD_SHOW = 13,
135 CMD_CHANGE = 14,
136
137 #if ENABLE_FEATURE_FBSET_FANCY
138 CMD_XRES = 100,
139 CMD_YRES = 101,
140 CMD_VXRES = 102,
141 CMD_VYRES = 103,
142 CMD_DEPTH = 104,
143 CMD_MATCH = 105,
144 CMD_PIXCLOCK = 106,
145 CMD_LEFT = 107,
146 CMD_RIGHT = 108,
147 CMD_UPPER = 109,
148 CMD_LOWER = 110,
149 CMD_HSLEN = 111,
150 CMD_VSLEN = 112,
151 CMD_CSYNC = 113,
152 CMD_GSYNC = 114,
153 CMD_EXTSYNC = 115,
154 CMD_BCAST = 116,
155 CMD_RGBA = 117,
156 CMD_STEP = 118,
157 CMD_MOVE = 119,
158 #endif
159 };
160
161 static const struct cmdoptions_t {
162 const char name[9];
163 const unsigned char param_count;
164 const unsigned char code;
165 } g_cmdoptions[] = {
166 /*"12345678" + NUL */
167 { "fb" , 1, CMD_FB },
168 { "db" , 1, CMD_DB },
169 { "a" , 0, CMD_ALL },
170 { "i" , 0, CMD_INFO },
171 { "g" , 5, CMD_GEOMETRY },
172 { "t" , 7, CMD_TIMING },
173 { "accel" , 1, CMD_ACCEL },
174 { "hsync" , 1, CMD_HSYNC },
175 { "vsync" , 1, CMD_VSYNC },
176 { "laced" , 1, CMD_LACED },
177 { "double" , 1, CMD_DOUBLE },
178 { "show" , 0, CMD_SHOW },
179 { "s" , 0, CMD_SHOW },
180 #if ENABLE_FEATURE_FBSET_FANCY
181 { "all" , 0, CMD_ALL },
182 { "xres" , 1, CMD_XRES },
183 { "yres" , 1, CMD_YRES },
184 { "vxres" , 1, CMD_VXRES },
185 { "vyres" , 1, CMD_VYRES },
186 { "depth" , 1, CMD_DEPTH },
187 { "match" , 0, CMD_MATCH },
188 { "geometry", 5, CMD_GEOMETRY },
189 { "pixclock", 1, CMD_PIXCLOCK },
190 { "left" , 1, CMD_LEFT },
191 { "right" , 1, CMD_RIGHT },
192 { "upper" , 1, CMD_UPPER },
193 { "lower" , 1, CMD_LOWER },
194 { "hslen" , 1, CMD_HSLEN },
195 { "vslen" , 1, CMD_VSLEN },
196 { "timings" , 7, CMD_TIMING },
197 { "csync" , 1, CMD_CSYNC },
198 { "gsync" , 1, CMD_GSYNC },
199 { "extsync" , 1, CMD_EXTSYNC },
200 { "bcast" , 1, CMD_BCAST },
201 { "rgba" , 1, CMD_RGBA },
202 { "step" , 1, CMD_STEP },
203 { "move" , 1, CMD_MOVE },
204 #endif
205 };
206
207 /* taken from linux/fb.h */
208 enum {
209 FB_SYNC_HOR_HIGH_ACT = 1, /* horizontal sync high active */
210 FB_SYNC_VERT_HIGH_ACT = 2, /* vertical sync high active */
211 #if ENABLE_FEATURE_FBSET_READMODE
212 FB_VMODE_INTERLACED = 1, /* interlaced */
213 FB_VMODE_DOUBLE = 2, /* double scan */
214 FB_SYNC_EXT = 4, /* external sync */
215 FB_SYNC_COMP_HIGH_ACT = 8, /* composite sync high active */
216 #endif
217 };
218
219 #if ENABLE_FEATURE_FBSET_READMODE
220 static void ss(uint32_t *x, uint32_t flag, char *buf, const char *what)
221 {
222 if (strcmp(buf, what) == 0)
223 *x &= ~flag;
224 else
225 *x |= flag;
226 }
227
228 /* Mode db file contains mode definitions like this:
229 * mode "800x600-48-lace"
230 * # D: 36.00 MHz, H: 33.835 kHz, V: 96.39 Hz
231 * geometry 800 600 800 600 8
232 * timings 27778 56 80 79 11 128 12
233 * laced true
234 * hsync high
235 * vsync high
236 * endmode
237 */
238 static int read_mode_db(struct fb_var_screeninfo *base, const char *fn,
239 const char *mode)
240 {
241 char *token[2], *p, *s;
242 parser_t *parser = config_open(fn);
243
244 while (config_read(parser, token, 2, 1, "# \t\r", PARSE_NORMAL)) {
245 if (strcmp(token[0], "mode") != 0 || !token[1])
246 continue;
247 p = strstr(token[1], mode);
248 if (!p)
249 continue;
250 s = p + strlen(mode);
251 //bb_info_msg("CHECK[%s][%s][%d]", mode, p-1, *s);
252 /* exact match? */
253 if (((!*s || isspace(*s)) && '"' != s[-1]) /* end-of-token */
254 || ('"' == *s && '"' == p[-1]) /* ends with " but starts with " too! */
255 ) {
256 //bb_info_msg("FOUND[%s][%s][%s][%d]", token[1], p, mode, isspace(*s));
257 break;
258 }
259 }
260
261 if (!token[0])
262 return 0;
263
264 while (config_read(parser, token, 2, 1, "# \t", PARSE_NORMAL)) {
265 int i;
266
267 //bb_info_msg("???[%s][%s]", token[0], token[1]);
268 if (strcmp(token[0], "endmode") == 0) {
269 //bb_info_msg("OK[%s]", mode);
270 return 1;
271 }
272 p = token[1];
273 i = index_in_strings(
274 "geometry\0timings\0interlaced\0double\0vsync\0hsync\0csync\0extsync\0",
275 token[0]);
276 switch (i) {
277 case 0:
278 if (sizeof(int) == sizeof(base->xres)) {
279 sscanf(p, "%d %d %d %d %d",
280 &base->xres, &base->yres,
281 &base->xres_virtual, &base->yres_virtual,
282 &base->bits_per_pixel);
283 } else {
284 int base_xres, base_yres;
285 int base_xres_virtual, base_yres_virtual;
286 int base_bits_per_pixel;
287 sscanf(p, "%d %d %d %d %d",
288 &base_xres, &base_yres,
289 &base_xres_virtual, &base_yres_virtual,
290 &base_bits_per_pixel);
291 base->xres = base_xres;
292 base->yres = base_yres;
293 base->xres_virtual = base_xres_virtual;
294 base->yres_virtual = base_yres_virtual;
295 base->bits_per_pixel = base_bits_per_pixel;
296 }
297 //bb_info_msg("GEO[%s]", p);
298 break;
299 case 1:
300 if (sizeof(int) == sizeof(base->xres)) {
301 sscanf(p, "%d %d %d %d %d %d %d",
302 &base->pixclock,
303 &base->left_margin, &base->right_margin,
304 &base->upper_margin, &base->lower_margin,
305 &base->hsync_len, &base->vsync_len);
306 } else {
307 int base_pixclock;
308 int base_left_margin, base_right_margin;
309 int base_upper_margin, base_lower_margin;
310 int base_hsync_len, base_vsync_len;
311 sscanf(p, "%d %d %d %d %d %d %d",
312 &base_pixclock,
313 &base_left_margin, &base_right_margin,
314 &base_upper_margin, &base_lower_margin,
315 &base_hsync_len, &base_vsync_len);
316 base->pixclock = base_pixclock;
317 base->left_margin = base_left_margin;
318 base->right_margin = base_right_margin;
319 base->upper_margin = base_upper_margin;
320 base->lower_margin = base_lower_margin;
321 base->hsync_len = base_hsync_len;
322 base->vsync_len = base_vsync_len;
323 }
324 //bb_info_msg("TIM[%s]", p);
325 break;
326 case 2:
327 case 3: {
328 static const uint32_t syncs[] = {FB_VMODE_INTERLACED, FB_VMODE_DOUBLE};
329 ss(&base->vmode, syncs[i-2], p, "false");
330 //bb_info_msg("VMODE[%s]", p);
331 break;
332 }
333 case 4:
334 case 5:
335 case 6: {
336 static const uint32_t syncs[] = {FB_SYNC_VERT_HIGH_ACT, FB_SYNC_HOR_HIGH_ACT, FB_SYNC_COMP_HIGH_ACT};
337 ss(&base->sync, syncs[i-4], p, "low");
338 //bb_info_msg("SYNC[%s]", p);
339 break;
340 }
341 case 7:
342 ss(&base->sync, FB_SYNC_EXT, p, "false");
343 //bb_info_msg("EXTSYNC[%s]", p);
344 break;
345 }
346 }
347 return 0;
348 }
349 #endif
350
351 static NOINLINE void showmode(struct fb_var_screeninfo *v)
352 {
353 double drate = 0, hrate = 0, vrate = 0;
354
355 if (v->pixclock) {
356 drate = 1e12 / v->pixclock;
357 hrate = drate / (v->left_margin + v->xres + v->right_margin + v->hsync_len);
358 vrate = hrate / (v->upper_margin + v->yres + v->lower_margin + v->vsync_len);
359 }
360 printf("\nmode \"%ux%u-%u\"\n"
361 #if ENABLE_FEATURE_FBSET_FANCY
362 "\t# D: %.3f MHz, H: %.3f kHz, V: %.3f Hz\n"
363 #endif
364 "\tgeometry %u %u %u %u %u\n"
365 "\ttimings %u %u %u %u %u %u %u\n"
366 "\taccel %s\n"
367 "\trgba %u/%u,%u/%u,%u/%u,%u/%u\n"
368 "endmode\n\n",
369 v->xres, v->yres, (int) (vrate + 0.5),
370 #if ENABLE_FEATURE_FBSET_FANCY
371 drate / 1e6, hrate / 1e3, vrate,
372 #endif
373 v->xres, v->yres, v->xres_virtual, v->yres_virtual, v->bits_per_pixel,
374 v->pixclock, v->left_margin, v->right_margin, v->upper_margin, v->lower_margin,
375 v->hsync_len, v->vsync_len,
376 (v->accel_flags > 0 ? "true" : "false"),
377 v->red.length, v->red.offset, v->green.length, v->green.offset,
378 v->blue.length, v->blue.offset, v->transp.length, v->transp.offset);
379 }
380
381 int fbset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
382 int fbset_main(int argc, char **argv)
383 {
384 enum {
385 OPT_CHANGE = (1 << 0),
386 OPT_SHOW = (1 << 1),
387 OPT_READMODE = (1 << 2),
388 OPT_ALL = (1 << 3),
389 };
390 struct fb_var_screeninfo var_old, var_set;
391 int fh, i;
392 unsigned options = 0;
393
394 const char *fbdev = DEFAULTFBDEV;
395 const char *modefile = DEFAULTFBMODE;
396 char *thisarg;
397 char *mode = mode; /* for compiler */
398
399 memset(&var_set, 0xff, sizeof(var_set)); /* set all to -1 */
400
401 /* parse cmd args.... why do they have to make things so difficult? */
402 argv++;
403 argc--;
404 for (; argc > 0 && (thisarg = *argv) != NULL; argc--, argv++) {
405 if (thisarg[0] != '-') {
406 if (!ENABLE_FEATURE_FBSET_READMODE || argc != 1)
407 bb_show_usage();
408 mode = thisarg;
409 options |= OPT_READMODE;
410 goto contin;
411 }
412 for (i = 0; i < ARRAY_SIZE(g_cmdoptions); i++) {
413 if (strcmp(thisarg + 1, g_cmdoptions[i].name) != 0)
414 continue;
415 if (argc <= g_cmdoptions[i].param_count)
416 bb_show_usage();
417
418 switch (g_cmdoptions[i].code) {
419 case CMD_FB:
420 fbdev = argv[1];
421 break;
422 case CMD_DB:
423 modefile = argv[1];
424 break;
425 case CMD_ALL:
426 options |= OPT_ALL;
427 break;
428 case CMD_SHOW:
429 options |= OPT_SHOW;
430 break;
431 case CMD_GEOMETRY:
432 var_set.xres = xatou32(argv[1]);
433 var_set.yres = xatou32(argv[2]);
434 var_set.xres_virtual = xatou32(argv[3]);
435 var_set.yres_virtual = xatou32(argv[4]);
436 var_set.bits_per_pixel = xatou32(argv[5]);
437 break;
438 case CMD_TIMING:
439 var_set.pixclock = xatou32(argv[1]);
440 var_set.left_margin = xatou32(argv[2]);
441 var_set.right_margin = xatou32(argv[3]);
442 var_set.upper_margin = xatou32(argv[4]);
443 var_set.lower_margin = xatou32(argv[5]);
444 var_set.hsync_len = xatou32(argv[6]);
445 var_set.vsync_len = xatou32(argv[7]);
446 break;
447 case CMD_ACCEL:
448 break;
449 case CMD_HSYNC:
450 var_set.sync |= FB_SYNC_HOR_HIGH_ACT;
451 break;
452 case CMD_VSYNC:
453 var_set.sync |= FB_SYNC_VERT_HIGH_ACT;
454 break;
455 #if ENABLE_FEATURE_FBSET_FANCY
456 case CMD_XRES:
457 var_set.xres = xatou32(argv[1]);
458 break;
459 case CMD_YRES:
460 var_set.yres = xatou32(argv[1]);
461 break;
462 case CMD_DEPTH:
463 var_set.bits_per_pixel = xatou32(argv[1]);
464 break;
465 #endif
466 }
467 switch (g_cmdoptions[i].code) {
468 case CMD_FB:
469 case CMD_DB:
470 case CMD_ALL:
471 case CMD_SHOW:
472 break;
473 default:
474 /* other commands imply changes */
475 options |= OPT_CHANGE;
476 }
477 argc -= g_cmdoptions[i].param_count;
478 argv += g_cmdoptions[i].param_count;
479 goto contin;
480 }
481 bb_show_usage();
482 contin: ;
483 }
484
485 fh = xopen(fbdev, O_RDONLY);
486 xioctl(fh, FBIOGET_VSCREENINFO, &var_old);
487
488 if (options & OPT_READMODE) {
489 #if ENABLE_FEATURE_FBSET_READMODE
490 if (!read_mode_db(&var_old, modefile, mode)) {
491 bb_error_msg_and_die("unknown video mode '%s'", mode);
492 }
493 options |= OPT_CHANGE;
494 #endif
495 }
496
497 if (options & OPT_CHANGE) {
498 copy_changed_values(&var_old, &var_set);
499 if (options & OPT_ALL)
500 var_old.activate = FB_ACTIVATE_ALL;
501 xioctl(fh, FBIOPUT_VSCREENINFO, &var_old);
502 }
503
504 if (options == 0 || (options & OPT_SHOW))
505 showmode(&var_old);
506
507 if (ENABLE_FEATURE_CLEAN_UP)
508 close(fh);
509
510 return EXIT_SUCCESS;
511 }
Tomato firmware and modifications.