569 lines
17 KiB
C
569 lines
17 KiB
C
/* 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)
|
|
*/
|
|
//config:config FBSET
|
|
//config: bool "fbset (5.8 kb)"
|
|
//config: default y
|
|
//config: select PLATFORM_LINUX
|
|
//config: help
|
|
//config: fbset is used to show or change the settings of a Linux frame buffer
|
|
//config: device. The frame buffer device provides a simple and unique
|
|
//config: interface to access a graphics display. Enable this option
|
|
//config: if you wish to enable the 'fbset' utility.
|
|
//config:
|
|
//config:config FEATURE_FBSET_FANCY
|
|
//config: bool "Enable extra options"
|
|
//config: default y
|
|
//config: depends on FBSET
|
|
//config: help
|
|
//config: This option enables extended fbset options, allowing one to set the
|
|
//config: framebuffer size, color depth, etc. interface to access a graphics
|
|
//config: display. Enable this option if you wish to enable extended fbset
|
|
//config: options.
|
|
//config:
|
|
//config:config FEATURE_FBSET_READMODE
|
|
//config: bool "Enable readmode support"
|
|
//config: default y
|
|
//config: depends on FBSET
|
|
//config: help
|
|
//config: This option allows fbset to read the video mode database stored by
|
|
//config: default as /etc/fb.modes, which can be used to set frame buffer
|
|
//config: device to pre-defined video modes.
|
|
|
|
//applet:IF_FBSET(APPLET(fbset, BB_DIR_USR_SBIN, BB_SUID_DROP))
|
|
|
|
//kbuild:lib-$(CONFIG_FBSET) += fbset.o
|
|
|
|
//usage:#define fbset_trivial_usage
|
|
//usage: "[OPTIONS] [MODE]"
|
|
//usage:#define fbset_full_usage "\n\n"
|
|
//usage: "Show and modify frame buffer settings"
|
|
//usage:
|
|
//usage:#define fbset_example_usage
|
|
//usage: "$ fbset\n"
|
|
//usage: "mode \"1024x768-76\"\n"
|
|
//usage: " # D: 78.653 MHz, H: 59.949 kHz, V: 75.694 Hz\n"
|
|
//usage: " geometry 1024 768 1024 768 16\n"
|
|
//usage: " timings 12714 128 32 16 4 128 4\n"
|
|
//usage: " accel false\n"
|
|
//usage: " rgba 5/11,6/5,5/0,0/0\n"
|
|
//usage: "endmode\n"
|
|
|
|
#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 */
|
|
//TODO: convert to index_in_strings()
|
|
{ "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_error_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_error_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_error_msg("???[%s][%s]", token[0], token[1]);
|
|
if (strcmp(token[0], "endmode") == 0) {
|
|
//bb_error_msg("OK[%s]", mode);
|
|
return 1;
|
|
}
|
|
p = token[1];
|
|
i = index_in_strings(
|
|
"geometry\0timings\0interlaced\0double\0vsync\0hsync\0csync\0extsync\0rgba\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_error_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_error_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_error_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_error_msg("SYNC[%s]", p);
|
|
break;
|
|
}
|
|
case 7:
|
|
ss(&base->sync, FB_SYNC_EXT, p, "false");
|
|
//bb_error_msg("EXTSYNC[%s]", p);
|
|
break;
|
|
case 8: {
|
|
int red_offset, red_length;
|
|
int green_offset, green_length;
|
|
int blue_offset, blue_length;
|
|
int transp_offset, transp_length;
|
|
|
|
sscanf(p, "%d/%d,%d/%d,%d/%d,%d/%d",
|
|
&red_length, &red_offset,
|
|
&green_length, &green_offset,
|
|
&blue_length, &blue_offset,
|
|
&transp_length, &transp_offset);
|
|
base->red.offset = red_offset;
|
|
base->red.length = red_length;
|
|
base->red.msb_right = 0;
|
|
base->green.offset = green_offset;
|
|
base->green.length = green_length;
|
|
base->green.msb_right = 0;
|
|
base->blue.offset = blue_offset;
|
|
base->blue.length = blue_length;
|
|
base->blue.msb_right = 0;
|
|
base->transp.offset = transp_offset;
|
|
base->transp.length = transp_length;
|
|
base->transp.msb_right = 0;
|
|
}
|
|
}
|
|
}
|
|
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 << 3),
|
|
};
|
|
struct fb_var_screeninfo var_old, var_set;
|
|
int fh, i;
|
|
unsigned options = 0;
|
|
|
|
const char *fbdev = DEFAULTFBDEV;
|
|
IF_FEATURE_FBSET_READMODE(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] != '-') {
|
|
if (!ENABLE_FEATURE_FBSET_READMODE || argc != 1)
|
|
bb_show_usage();
|
|
mode = thisarg;
|
|
options |= OPT_READMODE;
|
|
goto contin;
|
|
}
|
|
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:
|
|
IF_FEATURE_FBSET_READMODE(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;
|
|
}
|
|
bb_show_usage();
|
|
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);
|
|
}
|
|
options |= OPT_CHANGE;
|
|
#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;
|
|
}
|