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-rw-r--r--sys/i386/isa/videoio.c202
1 files changed, 182 insertions, 20 deletions
diff --git a/sys/i386/isa/videoio.c b/sys/i386/isa/videoio.c
index 85c8f8d56ba8..681134c100ef 100644
--- a/sys/i386/isa/videoio.c
+++ b/sys/i386/isa/videoio.c
@@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
- * $Id$
+ * $Id: videoio.c,v 1.1 1998/09/15 18:16:38 sos Exp $
*/
#include "sc.h"
@@ -189,6 +189,7 @@ static int rows_offset = 1;
static void map_mode_table(u_char *map[], u_char *table, int max);
static void clear_mode_map(int ad, u_char *map[], int max, int color);
static int map_mode_num(int mode);
+static int map_gen_mode_num(int type, int color, int mode);
static int map_bios_mode_num(int type, int color, int bios_mode);
static u_char *get_mode_param(int mode);
static void fill_adapter_param(int code, video_adapter_t *adp);
@@ -249,7 +250,7 @@ clear_mode_map(int ad, u_char *map[], int max, int color)
}
}
-/* the non-standard video mode is based on a standard mode... */
+/* map the non-standard video mode to a known mode number */
static int
map_mode_num(int mode)
{
@@ -276,6 +277,58 @@ map_mode_num(int mode)
return mode;
}
+/* map a generic video mode to a known mode number */
+static int
+map_gen_mode_num(int type, int color, int mode)
+{
+ static struct {
+ int from;
+ int to_color;
+ int to_mono;
+ } mode_map[] = {
+ { M_TEXT_80x30, M_VGA_C80x30, M_VGA_M80x30, },
+ { M_TEXT_80x43, M_ENH_C80x43, M_ENH_B80x43, },
+ { M_TEXT_80x50, M_VGA_C80x50, M_VGA_M80x50, },
+ { M_TEXT_80x60, M_VGA_C80x60, M_VGA_M80x60, },
+ };
+ int i;
+
+ if (mode == M_TEXT_80x25) {
+ switch (type) {
+
+ case KD_VGA:
+ if (color)
+ return M_VGA_C80x25;
+ else
+ return M_VGA_M80x25;
+ break;
+
+ case KD_EGA:
+ if (color)
+ return M_ENH_C80x25;
+ else
+ return M_EGAMONO80x25;
+ break;
+
+ case KD_CGA:
+ return M_C80x25;
+
+ case KD_MONO:
+ case KD_HERCULES:
+ return M_EGAMONO80x25; /* XXX: this name is confusing */
+
+ default:
+ return -1;
+ }
+ }
+
+ for (i = 0; i < sizeof(mode_map)/sizeof(mode_map[0]); ++i) {
+ if (mode_map[i].from == mode)
+ return ((color) ? mode_map[i].to_color : mode_map[i].to_mono);
+ }
+ return mode;
+}
+
/* turn the BIOS video number into our video mode number */
static int
map_bios_mode_num(int type, int color, int bios_mode)
@@ -356,7 +409,7 @@ static u_char
{
if (mode >= V_MODE_MAP_SIZE)
mode = map_mode_num(mode);
- if (mode < V_MODE_MAP_SIZE)
+ if ((mode >= 0) && (mode < V_MODE_MAP_SIZE))
return mode_map[mode];
else
return NULL;
@@ -480,9 +533,14 @@ comp_adpregs(u_char *buf1, u_char *buf2)
return (identical) ? COMP_IDENTICAL : COMP_SIMILAR;
}
-/* exported functions */
+/* entry points */
-/* all adapters */
+/*
+ * init()
+ * Return the # of video adapters found; usually 1 or 0.
+ *
+ * all adapters
+ */
static int
vid_init(void)
{
@@ -739,7 +797,13 @@ vid_init(void)
return adapters;
}
-/* all adapters */
+/*
+ * adapter();
+ * Return a pointer to the video_adapter structure of the requested
+ * adapter.
+ *
+ * all adapters
+ */
static video_adapter_t
*vid_adapter(int ad)
{
@@ -750,7 +814,12 @@ static video_adapter_t
return &adapter[ad];
}
-/* all adapters */
+/*
+ * get_info():
+ * Return the video_info structure of the requested video mode.
+ *
+ * all adapters
+ */
static int
vid_get_info(int ad, int mode, video_info_t *info)
{
@@ -761,6 +830,8 @@ vid_get_info(int ad, int mode, video_info_t *info)
if ((ad < 0) || (ad >= adapters))
return 1;
+ mode = map_gen_mode_num(adapter[ad].va_type,
+ adapter[ad].va_flags & V_ADP_COLOR, mode);
if (adapter[ad].va_flags & V_ADP_MODECHANGE) {
/*
* If the parameter table entry for this mode is not found,
@@ -789,7 +860,14 @@ vid_get_info(int ad, int mode, video_info_t *info)
return 1;
}
-/* all adapters */
+/*
+ * query_mode():
+ * Find a video mode matching the requested parameters.
+ * Fields filled with 0 are considered "don't care" fields and
+ * match any modes.
+ *
+ * all adapters
+ */
static int
vid_query_mode(int ad, video_info_t *info)
{
@@ -836,7 +914,12 @@ vid_query_mode(int ad, video_info_t *info)
return -1;
}
-/* EGA/VGA */
+/*
+ * set_mode():
+ * Change the video mode.
+ *
+ * EGA/VGA
+ */
static int
vid_set_mode(int ad, int mode)
{
@@ -845,6 +928,8 @@ vid_set_mode(int ad, int mode)
prologue(ad, V_ADP_MODECHANGE, 1);
+ mode = map_gen_mode_num(adapter[ad].va_type,
+ adapter[ad].va_flags & V_ADP_COLOR, mode);
if (vid_get_info(ad, mode, &info))
return 1;
params.sig = V_STATE_SIG;
@@ -1061,7 +1146,12 @@ set_normal_mode(video_adapter_t *adp, u_char *buf)
splx(s);
}
-/* EGA/VGA */
+/*
+ * save_font():
+ * Read the font data in the requested font page from the video adapter.
+ *
+ * EGA/VGA
+ */
static int
vid_save_font(int ad, int page, int fontsize, u_char *data, int ch, int count)
{
@@ -1092,6 +1182,7 @@ vid_save_font(int ad, int page, int fontsize, u_char *data, int ch, int count)
if (page > 3)
segment -= 0xe000;
+#ifndef SC_BAD_FLICKER
if (adapter[ad].va_type == KD_VGA) { /* what about EGA? XXX */
s = splhigh();
outb(TSIDX, 0x00); outb(TSREG, 0x01);
@@ -1100,6 +1191,7 @@ vid_save_font(int ad, int page, int fontsize, u_char *data, int ch, int count)
outb(TSIDX, 0x00); outb(TSREG, 0x03);
splx(s);
}
+#endif
set_font_mode(&adapter[ad], buf);
if (fontsize == 32) {
@@ -1114,6 +1206,7 @@ vid_save_font(int ad, int page, int fontsize, u_char *data, int ch, int count)
}
set_normal_mode(&adapter[ad], buf);
+#ifndef SC_BAD_FLICKER
if (adapter[ad].va_type == KD_VGA) {
s = splhigh();
outb(TSIDX, 0x00); outb(TSREG, 0x01);
@@ -1121,11 +1214,19 @@ vid_save_font(int ad, int page, int fontsize, u_char *data, int ch, int count)
outb(TSIDX, 0x00); outb(TSREG, 0x03);
splx(s);
}
+#endif
return 0;
}
-/* EGA/VGA */
+/*
+ * load_font():
+ * Set the font data in the requested font page.
+ * NOTE: it appears that some recent video adapters do not support
+ * the font page other than 0... XXX
+ *
+ * EGA/VGA
+ */
static int
vid_load_font(int ad, int page, int fontsize, u_char *data, int ch, int count)
{
@@ -1156,6 +1257,7 @@ vid_load_font(int ad, int page, int fontsize, u_char *data, int ch, int count)
if (page > 3)
segment -= 0xe000;
+#ifndef SC_BAD_FLICKER
if (adapter[ad].va_type == KD_VGA) { /* what about EGA? XXX */
s = splhigh();
outb(TSIDX, 0x00); outb(TSREG, 0x01);
@@ -1164,6 +1266,7 @@ vid_load_font(int ad, int page, int fontsize, u_char *data, int ch, int count)
outb(TSIDX, 0x00); outb(TSREG, 0x03);
splx(s);
}
+#endif
set_font_mode(&adapter[ad], buf);
if (fontsize == 32) {
@@ -1178,6 +1281,7 @@ vid_load_font(int ad, int page, int fontsize, u_char *data, int ch, int count)
}
set_normal_mode(&adapter[ad], buf);
+#ifndef SC_BAD_FLICKER
if (adapter[ad].va_type == KD_VGA) {
s = splhigh();
outb(TSIDX, 0x00); outb(TSREG, 0x01);
@@ -1185,11 +1289,19 @@ vid_load_font(int ad, int page, int fontsize, u_char *data, int ch, int count)
outb(TSIDX, 0x00); outb(TSREG, 0x03);
splx(s);
}
+#endif
return 0;
}
-/* EGA/VGA */
+/*
+ * show_font():
+ * Activate the requested font page.
+ * NOTE: it appears that some recent video adapters do not support
+ * the font page other than 0... XXX
+ *
+ * EGA/VGA
+ */
static int
vid_show_font(int ad, int page)
{
@@ -1207,7 +1319,12 @@ vid_show_font(int ad, int page)
return 0;
}
-/* VGA */
+/*
+ * save_palette():
+ * Read DAC values. The values have expressed in 8 bits.
+ *
+ * VGA
+ */
static int
vid_save_palette(int ad, u_char *palette)
{
@@ -1226,7 +1343,12 @@ vid_save_palette(int ad, u_char *palette)
return 0;
}
-/* VGA */
+/*
+ * load_palette():
+ * Set DAC values.
+ *
+ * VGA
+ */
static int
vid_load_palette(int ad, u_char *palette)
{
@@ -1243,7 +1365,12 @@ vid_load_palette(int ad, u_char *palette)
return 0;
}
-/* CGA/EGA/VGA */
+/*
+ * set_border():
+ * Change the border color.
+ *
+ * CGA/EGA/VGA
+ */
static int
vid_set_border(int ad, int color)
{
@@ -1266,7 +1393,14 @@ vid_set_border(int ad, int color)
return 0;
}
-/* VGA */
+/*
+ * save_state():
+ * Read video register values.
+ * NOTE: this function only reads the standard EGA/VGA registers.
+ * any extra/extended registers of SVGA adapters are not saved.
+ *
+ * VGA
+ */
static int
vid_save_state(int ad, void *p, size_t size)
{
@@ -1345,7 +1479,14 @@ vid_save_state(int ad, void *p, size_t size)
return 0;
}
-/* EGA/VGA */
+/*
+ * load_state():
+ * Set video registers at once.
+ * NOTE: this function only updates the standard EGA/VGA registers.
+ * any extra/extended registers of SVGA adapters are not changed.
+ *
+ * EGA/VGA
+ */
static int
vid_load_state(int ad, void *p)
{
@@ -1402,7 +1543,10 @@ vid_load_state(int ad, void *p)
return 0;
}
-/* all */
+/*
+ * set_origin():
+ * Change the origin (window mapping) of the banked frame buffer.
+ */
static int
vid_set_origin(int ad, off_t offset)
{
@@ -1413,7 +1557,12 @@ vid_set_origin(int ad, off_t offset)
return 1;
}
-/* all */
+/*
+ * read_hw_cursor():
+ * Read the position of the hardware text cursor.
+ *
+ * all adapters
+ */
static int
vid_read_hw_cursor(int ad, int *col, int *row)
{
@@ -1440,7 +1589,13 @@ vid_read_hw_cursor(int ad, int *col, int *row)
return 0;
}
-/* all */
+/*
+ * set_hw_cursor():
+ * Move the hardware text cursor. If the requested position is (-1, -1),
+ * the text cursor won't be shown.
+ *
+ * all adapters
+ */
static int
vid_set_hw_cursor(int ad, int col, int row)
{
@@ -1540,6 +1695,13 @@ dump_buffer(u_char *buf, size_t len)
}
}
+/*
+ * diag():
+ * Print some information about the video adapter and video modes,
+ * with requested level of details.
+ *
+ * all adapters
+ */
static int
vid_diag(int level)
{
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-09 13:41:52 +0000