diff options
Diffstat (limited to 'util-linux')
| -rw-r--r-- | util-linux/fbset.c | 269 |
1 files changed, 172 insertions, 97 deletions
diff --git a/util-linux/fbset.c b/util-linux/fbset.c index 6e497c6..dc3245b 100644 --- a/util-linux/fbset.c +++ b/util-linux/fbset.c @@ -17,52 +17,13 @@ #define DEFAULTFBDEV FB_0 #define DEFAULTFBMODE "/etc/fb.modes" -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 -}; - /* 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 */ @@ -106,6 +67,81 @@ struct fb_var_screeninfo { 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]; @@ -174,6 +210,16 @@ static void ss(uint32_t *x, uint32_t flag, char *buf, const char *what) *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) { @@ -214,19 +260,52 @@ static int read_mode_db(struct fb_var_screeninfo *base, const char *fn, token[0]); switch (i) { case 0: - /* FIXME: catastrophic on arches with 64bit ints */ - sscanf(p, "%d %d %d %d %d", - &(base->xres), &(base->yres), - &(base->xres_virtual), &(base->yres_virtual), - &(base->bits_per_pixel)); + 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: - 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)); + 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: @@ -254,21 +333,6 @@ static int read_mode_db(struct fb_var_screeninfo *base, const char *fn, } #endif -static void setfbmode(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; - if ((int32_t) set->bits_per_pixel > 0) - base->bits_per_pixel = set->bits_per_pixel; -} - static NOINLINE void showmode(struct fb_var_screeninfo *v) { double drate = 0, hrate = 0, vrate = 0; @@ -308,15 +372,16 @@ int fbset_main(int argc, char **argv) OPT_READMODE = (1 << 2), OPT_ALL = (1 << 9), }; - struct fb_var_screeninfo var, varset; + struct fb_var_screeninfo var_old, var_set; int fh, i; unsigned options = 0; const char *fbdev = DEFAULTFBDEV; const char *modefile = DEFAULTFBMODE; - char *thisarg, *mode = NULL; + char *thisarg; + char *mode = mode; /* for compiler */ - memset(&varset, 0xff, sizeof(varset)); + memset(&var_set, 0xff, sizeof(var_set)); /* set all to -1 */ /* parse cmd args.... why do they have to make things so difficult? */ argv++; @@ -342,30 +407,38 @@ int fbset_main(int argc, char **argv) options |= OPT_SHOW; break; case CMD_GEOMETRY: - varset.xres = xatou32(argv[1]); - varset.yres = xatou32(argv[2]); - varset.xres_virtual = xatou32(argv[3]); - varset.yres_virtual = xatou32(argv[4]); - varset.bits_per_pixel = xatou32(argv[5]); + 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: - varset.pixclock = xatou32(argv[1]); - varset.left_margin = xatou32(argv[2]); - varset.right_margin = xatou32(argv[3]); - varset.upper_margin = xatou32(argv[4]); - varset.lower_margin = xatou32(argv[5]); - varset.hsync_len = xatou32(argv[6]); - varset.vsync_len = xatou32(argv[7]); + 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: - varset.xres = xatou32(argv[1]); + var_set.xres = xatou32(argv[1]); break; case CMD_YRES: - varset.yres = xatou32(argv[1]); + var_set.yres = xatou32(argv[1]); break; case CMD_DEPTH: - varset.bits_per_pixel = xatou32(argv[1]); + var_set.bits_per_pixel = xatou32(argv[1]); break; #endif } @@ -376,13 +449,14 @@ int fbset_main(int argc, char **argv) case CMD_SHOW: break; default: - options |= OPT_CHANGE; /* the other commands imply changes */ + /* other commands imply changes */ + options |= OPT_CHANGE; } argc -= g_cmdoptions[i].param_count; argv += g_cmdoptions[i].param_count; goto contin; } - if (argc != 1) + if (!ENABLE_FEATURE_FBSET_READMODE || argc != 1) bb_show_usage(); mode = *argv; options |= OPT_READMODE; @@ -390,27 +464,28 @@ int fbset_main(int argc, char **argv) } fh = xopen(fbdev, O_RDONLY); - xioctl(fh, FBIOGET_VSCREENINFO, &var); + xioctl(fh, FBIOGET_VSCREENINFO, &var_old); + if (options & OPT_READMODE) { -#if !ENABLE_FEATURE_FBSET_READMODE - bb_show_usage(); -#else - if (!read_mode_db(&var, modefile, mode)) { +#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) { - setfbmode(&var, &varset); + copy_changed_values(&var_old, &var_set); if (options & OPT_ALL) - var.activate = FB_ACTIVATE_ALL; - xioctl(fh, FBIOPUT_VSCREENINFO, &var); + var_old.activate = FB_ACTIVATE_ALL; + xioctl(fh, FBIOPUT_VSCREENINFO, &var_old); } - if (options == 0 || options & OPT_SHOW) - showmode(&var); - /* Don't close the file, as exiting will take care of that */ - /* close(fh); */ + + if (options == 0 || (options & OPT_SHOW)) + showmode(&var_old); + + if (ENABLE_FEATURE_CLEAN_UP) + close(fh); return EXIT_SUCCESS; } |