mirror of
https://github.com/sheumann/hush.git
synced 2024-09-12 15:54:56 +00:00
things like xasprintf() into xfuncs.c, remove xprint_file_by_name() (it only had one user), clean up lots of #includes... General cleanup pass. What I've been doing for the last couple days. And it conflicts! I've removed httpd.c from this checkin due to somebody else touching that file. It builds for me. I have to catch a bus. (Now you know why I'm looking forward to Mercurial.)
410 lines
11 KiB
C
410 lines
11 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini fbset implementation for busybox
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*
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* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*
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* This is a from-scratch implementation of fbset; but the de facto fbset
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* implementation was a good reference. fbset (original) is released under
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* the GPL, and is (c) 1995-1999 by:
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* Geert Uytterhoeven (Geert.Uytterhoeven@cs.kuleuven.ac.be)
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*/
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#include "busybox.h"
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#define DEFAULTFBDEV FB_0
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#define DEFAULTFBMODE "/etc/fb.modes"
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enum {
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OPT_CHANGE = (1 << 0),
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OPT_INFO = (1 << 1),
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OPT_READMODE = (1 << 2),
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CMD_FB = 1,
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CMD_DB = 2,
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CMD_GEOMETRY = 3,
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CMD_TIMING = 4,
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CMD_ACCEL = 5,
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CMD_HSYNC = 6,
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CMD_VSYNC = 7,
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CMD_LACED = 8,
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CMD_DOUBLE = 9,
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/* CMD_XCOMPAT = 10, */
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CMD_ALL = 11,
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CMD_INFO = 12,
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CMD_CHANGE = 13,
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#ifdef CONFIG_FEATURE_FBSET_FANCY
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CMD_XRES = 100,
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CMD_YRES = 101,
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CMD_VXRES = 102,
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CMD_VYRES = 103,
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CMD_DEPTH = 104,
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CMD_MATCH = 105,
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CMD_PIXCLOCK = 106,
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CMD_LEFT = 107,
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CMD_RIGHT = 108,
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CMD_UPPER = 109,
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CMD_LOWER = 110,
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CMD_HSLEN = 111,
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CMD_VSLEN = 112,
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CMD_CSYNC = 113,
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CMD_GSYNC = 114,
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CMD_EXTSYNC = 115,
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CMD_BCAST = 116,
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CMD_RGBA = 117,
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CMD_STEP = 118,
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CMD_MOVE = 119,
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#endif
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};
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static unsigned int g_options = 0;
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/* Stuff stolen from the kernel's fb.h */
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enum {
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FBIOGET_VSCREENINFO = 0x4600,
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FBIOPUT_VSCREENINFO = 0x4601
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};
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struct fb_bitfield {
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uint32_t offset; /* beginning of bitfield */
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uint32_t length; /* length of bitfield */
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uint32_t msb_right; /* != 0 : Most significant bit is */
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/* right */
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};
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struct fb_var_screeninfo {
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uint32_t xres; /* visible resolution */
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uint32_t yres;
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uint32_t xres_virtual; /* virtual resolution */
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uint32_t yres_virtual;
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uint32_t xoffset; /* offset from virtual to visible */
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uint32_t yoffset; /* resolution */
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uint32_t bits_per_pixel; /* guess what */
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uint32_t grayscale; /* != 0 Graylevels instead of colors */
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struct fb_bitfield red; /* bitfield in fb mem if true color, */
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struct fb_bitfield green; /* else only length is significant */
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struct fb_bitfield blue;
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struct fb_bitfield transp; /* transparency */
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uint32_t nonstd; /* != 0 Non standard pixel format */
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uint32_t activate; /* see FB_ACTIVATE_* */
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uint32_t height; /* height of picture in mm */
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uint32_t width; /* width of picture in mm */
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uint32_t accel_flags; /* acceleration flags (hints) */
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/* Timing: All values in pixclocks, except pixclock (of course) */
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uint32_t pixclock; /* pixel clock in ps (pico seconds) */
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uint32_t left_margin; /* time from sync to picture */
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uint32_t right_margin; /* time from picture to sync */
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uint32_t upper_margin; /* time from sync to picture */
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uint32_t lower_margin;
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uint32_t hsync_len; /* length of horizontal sync */
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uint32_t vsync_len; /* length of vertical sync */
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uint32_t sync; /* see FB_SYNC_* */
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uint32_t vmode; /* see FB_VMODE_* */
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uint32_t reserved[6]; /* Reserved for future compatibility */
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};
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static const struct cmdoptions_t {
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const char *name;
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const unsigned char param_count;
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const unsigned char code;
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} g_cmdoptions[] = {
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{
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"-fb", 1, CMD_FB}, {
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"-db", 1, CMD_DB}, {
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"-a", 0, CMD_ALL}, {
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"-i", 0, CMD_INFO}, {
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"-g", 5, CMD_GEOMETRY}, {
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"-t", 7, CMD_TIMING}, {
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"-accel", 1, CMD_ACCEL}, {
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"-hsync", 1, CMD_HSYNC}, {
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"-vsync", 1, CMD_VSYNC}, {
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"-laced", 1, CMD_LACED}, {
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"-double", 1, CMD_DOUBLE}, {
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"-n", 0, CMD_CHANGE}, {
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#ifdef CONFIG_FEATURE_FBSET_FANCY
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"-all", 0, CMD_ALL}, {
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"-xres", 1, CMD_XRES}, {
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"-yres", 1, CMD_YRES}, {
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"-vxres", 1, CMD_VXRES}, {
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"-vyres", 1, CMD_VYRES}, {
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"-depth", 1, CMD_DEPTH}, {
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"-match", 0, CMD_MATCH}, {
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"-geometry", 5, CMD_GEOMETRY}, {
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"-pixclock", 1, CMD_PIXCLOCK}, {
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"-left", 1, CMD_LEFT}, {
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"-right", 1, CMD_RIGHT}, {
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"-upper", 1, CMD_UPPER}, {
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"-lower", 1, CMD_LOWER}, {
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"-hslen", 1, CMD_HSLEN}, {
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"-vslen", 1, CMD_VSLEN}, {
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"-timings", 7, CMD_TIMING}, {
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"-csync", 1, CMD_CSYNC}, {
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"-gsync", 1, CMD_GSYNC}, {
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"-extsync", 1, CMD_EXTSYNC}, {
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"-bcast", 1, CMD_BCAST}, {
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"-rgba", 1, CMD_RGBA}, {
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"-step", 1, CMD_STEP}, {
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"-move", 1, CMD_MOVE}, {
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#endif
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0, 0, 0}
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};
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#ifdef CONFIG_FEATURE_FBSET_READMODE
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/* taken from linux/fb.h */
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enum {
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FB_VMODE_INTERLACED = 1, /* interlaced */
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FB_VMODE_DOUBLE = 2, /* double scan */
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FB_SYNC_HOR_HIGH_ACT = 1, /* horizontal sync high active */
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FB_SYNC_VERT_HIGH_ACT = 2, /* vertical sync high active */
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FB_SYNC_EXT = 4, /* external sync */
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FB_SYNC_COMP_HIGH_ACT = 8 /* composite sync high active */
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};
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#endif
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static int readmode(struct fb_var_screeninfo *base, const char *fn,
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const char *mode)
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{
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#ifdef CONFIG_FEATURE_FBSET_READMODE
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FILE *f;
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char buf[256];
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char *p = buf;
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f = xfopen(fn, "r");
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while (!feof(f)) {
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fgets(buf, sizeof(buf), f);
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if ((p = strstr(buf, "mode ")) || (p = strstr(buf, "mode\t"))) {
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p += 5;
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if ((p = strstr(buf, mode))) {
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p += strlen(mode);
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if (!isspace(*p) && (*p != 0) && (*p != '"')
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&& (*p != '\r') && (*p != '\n'))
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continue; /* almost, but not quite */
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while (!feof(f)) {
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fgets(buf, sizeof(buf), f);
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if ((p = strstr(buf, "geometry "))) {
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p += 9;
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sscanf(p, "%d %d %d %d %d",
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&(base->xres), &(base->yres),
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&(base->xres_virtual), &(base->yres_virtual),
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&(base->bits_per_pixel));
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} else if ((p = strstr(buf, "timings "))) {
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p += 8;
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sscanf(p, "%d %d %d %d %d %d %d",
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&(base->pixclock),
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&(base->left_margin), &(base->right_margin),
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&(base->upper_margin), &(base->lower_margin),
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&(base->hsync_len), &(base->vsync_len));
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} else if ((p = strstr(buf, "laced "))) {
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p += 6;
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if (strstr(buf, "false")) {
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base->vmode &= ~FB_VMODE_INTERLACED;
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} else {
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base->vmode |= FB_VMODE_INTERLACED;
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}
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} else if ((p = strstr(buf, "double "))) {
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p += 7;
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if (strstr(buf, "false")) {
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base->vmode &= ~FB_VMODE_DOUBLE;
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} else {
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base->vmode |= FB_VMODE_DOUBLE;
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}
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} else if ((p = strstr(buf, "vsync "))) {
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p += 6;
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if (strstr(buf, "low")) {
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base->sync &= ~FB_SYNC_VERT_HIGH_ACT;
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} else {
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base->sync |= FB_SYNC_VERT_HIGH_ACT;
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}
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} else if ((p = strstr(buf, "hsync "))) {
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p += 6;
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if (strstr(buf, "low")) {
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base->sync &= ~FB_SYNC_HOR_HIGH_ACT;
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} else {
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base->sync |= FB_SYNC_HOR_HIGH_ACT;
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}
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} else if ((p = strstr(buf, "csync "))) {
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p += 6;
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if (strstr(buf, "low")) {
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base->sync &= ~FB_SYNC_COMP_HIGH_ACT;
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} else {
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base->sync |= FB_SYNC_COMP_HIGH_ACT;
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}
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} else if ((p = strstr(buf, "extsync "))) {
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p += 8;
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if (strstr(buf, "false")) {
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base->sync &= ~FB_SYNC_EXT;
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} else {
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base->sync |= FB_SYNC_EXT;
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}
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}
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if (strstr(buf, "endmode"))
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return 1;
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}
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}
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}
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}
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#else
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bb_error_msg( "mode reading not compiled in");
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#endif
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return 0;
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}
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static inline void setmode(struct fb_var_screeninfo *base,
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struct fb_var_screeninfo *set)
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{
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if ((int) set->xres > 0)
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base->xres = set->xres;
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if ((int) set->yres > 0)
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base->yres = set->yres;
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if ((int) set->xres_virtual > 0)
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base->xres_virtual = set->xres_virtual;
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if ((int) set->yres_virtual > 0)
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base->yres_virtual = set->yres_virtual;
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if ((int) set->bits_per_pixel > 0)
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base->bits_per_pixel = set->bits_per_pixel;
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}
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static inline void showmode(struct fb_var_screeninfo *v)
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{
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double drate = 0, hrate = 0, vrate = 0;
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if (v->pixclock) {
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drate = 1e12 / v->pixclock;
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hrate =
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drate / (v->left_margin + v->xres + v->right_margin +
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v->hsync_len);
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vrate =
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hrate / (v->upper_margin + v->yres + v->lower_margin +
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v->vsync_len);
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}
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printf("\nmode \"%ux%u-%u\"\n"
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#ifdef CONFIG_FEATURE_FBSET_FANCY
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"\t# D: %.3f MHz, H: %.3f kHz, V: %.3f Hz\n"
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#endif
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"\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\nendmode\n\n",
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v->xres, v->yres, (int) (vrate + 0.5),
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#ifdef CONFIG_FEATURE_FBSET_FANCY
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drate / 1e6, hrate / 1e3, vrate,
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#endif
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v->xres, v->yres, v->xres_virtual, v->yres_virtual,
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v->bits_per_pixel, v->pixclock, v->left_margin,
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v->right_margin, v->upper_margin, v->lower_margin, v->hsync_len,
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v->vsync_len, (v->accel_flags > 0 ? "true" : "false"), v->red.length,
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v->red.offset, v->green.length, v->green.offset, v->blue.length,
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v->blue.offset, v->transp.length, v->transp.offset);
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}
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#ifdef STANDALONE
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int main(int argc, char **argv)
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#else
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int fbset_main(int argc, char **argv)
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#endif
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{
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struct fb_var_screeninfo var, varset;
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int fh, i;
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char *fbdev = DEFAULTFBDEV;
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char *modefile = DEFAULTFBMODE;
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char *thisarg, *mode = NULL;
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memset(&varset, 0xFF, sizeof(varset));
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/* parse cmd args.... why do they have to make things so difficult? */
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argv++;
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argc--;
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for (; argc > 0 && (thisarg = *argv); argc--, argv++) {
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for (i = 0; g_cmdoptions[i].name; i++) {
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if (!strcmp(thisarg, g_cmdoptions[i].name)) {
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if (argc - 1 < g_cmdoptions[i].param_count)
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bb_show_usage();
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switch (g_cmdoptions[i].code) {
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case CMD_FB:
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fbdev = argv[1];
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break;
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case CMD_DB:
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modefile = argv[1];
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break;
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case CMD_GEOMETRY:
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varset.xres = strtoul(argv[1], 0, 0);
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varset.yres = strtoul(argv[2], 0, 0);
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varset.xres_virtual = strtoul(argv[3], 0, 0);
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varset.yres_virtual = strtoul(argv[4], 0, 0);
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varset.bits_per_pixel = strtoul(argv[5], 0, 0);
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break;
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case CMD_TIMING:
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varset.pixclock = strtoul(argv[1], 0, 0);
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varset.left_margin = strtoul(argv[2], 0, 0);
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varset.right_margin = strtoul(argv[3], 0, 0);
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varset.upper_margin = strtoul(argv[4], 0, 0);
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varset.lower_margin = strtoul(argv[5], 0, 0);
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varset.hsync_len = strtoul(argv[6], 0, 0);
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varset.vsync_len = strtoul(argv[7], 0, 0);
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break;
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case CMD_CHANGE:
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g_options |= OPT_CHANGE;
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break;
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#ifdef CONFIG_FEATURE_FBSET_FANCY
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case CMD_XRES:
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varset.xres = strtoul(argv[1], 0, 0);
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break;
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case CMD_YRES:
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varset.yres = strtoul(argv[1], 0, 0);
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break;
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case CMD_DEPTH:
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varset.bits_per_pixel = strtoul(argv[1], 0, 0);
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break;
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#endif
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}
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argc -= g_cmdoptions[i].param_count;
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argv += g_cmdoptions[i].param_count;
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break;
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}
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}
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if (!g_cmdoptions[i].name) {
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if (argc == 1) {
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mode = *argv;
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g_options |= OPT_READMODE;
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} else {
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bb_show_usage();
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}
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}
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}
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fh = xopen(fbdev, O_RDONLY);
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if (ioctl(fh, FBIOGET_VSCREENINFO, &var))
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bb_perror_msg_and_die("fbset(ioctl)");
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if (g_options & OPT_READMODE) {
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if (!readmode(&var, modefile, mode)) {
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bb_error_msg("Unknown video mode `%s'", mode);
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return EXIT_FAILURE;
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}
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}
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setmode(&var, &varset);
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if (g_options & OPT_CHANGE)
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if (ioctl(fh, FBIOPUT_VSCREENINFO, &var))
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bb_perror_msg_and_die("fbset(ioctl)");
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showmode(&var);
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/* Don't close the file, as exiting will take care of that */
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/* close(fh); */
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return EXIT_SUCCESS;
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}
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