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-rw-r--r--xorg-server/hw/xfree86/vgahw/vgaHW.c2004
1 files changed, 2004 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/vgahw/vgaHW.c b/xorg-server/hw/xfree86/vgahw/vgaHW.c
new file mode 100644
index 000000000..ccbd19574
--- /dev/null
+++ b/xorg-server/hw/xfree86/vgahw/vgaHW.c
@@ -0,0 +1,2004 @@
+
+/*
+ *
+ * Copyright 1991-1999 by The XFree86 Project, Inc.
+ *
+ * Loosely based on code bearing the following copyright:
+ *
+ * Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
+ *
+ */
+
+#define _NEED_SYSI86
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <X11/X.h>
+#include "misc.h"
+
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#include "vgaHW.h"
+
+#include "compiler.h"
+
+#include "xf86cmap.h"
+
+#include "Pci.h"
+
+#ifndef SAVE_FONT1
+#define SAVE_FONT1 1
+#endif
+
+/*
+ * These used to be OS-specific, which made this module have an undesirable
+ * OS dependency. Define them by default for all platforms.
+ */
+#ifndef NEED_SAVED_CMAP
+#define NEED_SAVED_CMAP
+#endif
+#ifndef SAVE_TEXT
+#define SAVE_TEXT 1
+#endif
+#ifndef SAVE_FONT2
+#define SAVE_FONT2 1
+#endif
+
+/* bytes per plane to save for text */
+#define TEXT_AMOUNT 16384
+
+/* bytes per plane to save for font data */
+#define FONT_AMOUNT (8*8192)
+
+#if 0
+/* Override all of these for now */
+#undef SAVE_FONT1
+#define SAVE_FONT1 1
+#undef SAVE_FONT2
+#define SAVE_FONT2 1
+#undef SAVE_TEST
+#define SAVE_TEST 1
+#undef FONT_AMOUNT
+#define FONT_AMOUNT 65536
+#undef TEXT_AMOUNT
+#define TEXT_AMOUNT 65536
+#endif
+
+/* DAC indices for white and black */
+#define WHITE_VALUE 0x3F
+#define BLACK_VALUE 0x00
+#define OVERSCAN_VALUE 0x01
+
+
+/* Use a private definition of this here */
+#undef VGAHWPTR
+#define VGAHWPTRLVAL(p) (p)->privates[vgaHWPrivateIndex].ptr
+#define VGAHWPTR(p) ((vgaHWPtr)(VGAHWPTRLVAL(p)))
+
+static int vgaHWPrivateIndex = -1;
+
+#define DAC_TEST_MASK 0x3F
+
+#ifdef NEED_SAVED_CMAP
+/* This default colourmap is used only when it can't be read from the VGA */
+
+static CARD8 defaultDAC[768] =
+{
+ 0, 0, 0, 0, 0, 42, 0, 42, 0, 0, 42, 42,
+ 42, 0, 0, 42, 0, 42, 42, 21, 0, 42, 42, 42,
+ 21, 21, 21, 21, 21, 63, 21, 63, 21, 21, 63, 63,
+ 63, 21, 21, 63, 21, 63, 63, 63, 21, 63, 63, 63,
+ 0, 0, 0, 5, 5, 5, 8, 8, 8, 11, 11, 11,
+ 14, 14, 14, 17, 17, 17, 20, 20, 20, 24, 24, 24,
+ 28, 28, 28, 32, 32, 32, 36, 36, 36, 40, 40, 40,
+ 45, 45, 45, 50, 50, 50, 56, 56, 56, 63, 63, 63,
+ 0, 0, 63, 16, 0, 63, 31, 0, 63, 47, 0, 63,
+ 63, 0, 63, 63, 0, 47, 63, 0, 31, 63, 0, 16,
+ 63, 0, 0, 63, 16, 0, 63, 31, 0, 63, 47, 0,
+ 63, 63, 0, 47, 63, 0, 31, 63, 0, 16, 63, 0,
+ 0, 63, 0, 0, 63, 16, 0, 63, 31, 0, 63, 47,
+ 0, 63, 63, 0, 47, 63, 0, 31, 63, 0, 16, 63,
+ 31, 31, 63, 39, 31, 63, 47, 31, 63, 55, 31, 63,
+ 63, 31, 63, 63, 31, 55, 63, 31, 47, 63, 31, 39,
+ 63, 31, 31, 63, 39, 31, 63, 47, 31, 63, 55, 31,
+ 63, 63, 31, 55, 63, 31, 47, 63, 31, 39, 63, 31,
+ 31, 63, 31, 31, 63, 39, 31, 63, 47, 31, 63, 55,
+ 31, 63, 63, 31, 55, 63, 31, 47, 63, 31, 39, 63,
+ 45, 45, 63, 49, 45, 63, 54, 45, 63, 58, 45, 63,
+ 63, 45, 63, 63, 45, 58, 63, 45, 54, 63, 45, 49,
+ 63, 45, 45, 63, 49, 45, 63, 54, 45, 63, 58, 45,
+ 63, 63, 45, 58, 63, 45, 54, 63, 45, 49, 63, 45,
+ 45, 63, 45, 45, 63, 49, 45, 63, 54, 45, 63, 58,
+ 45, 63, 63, 45, 58, 63, 45, 54, 63, 45, 49, 63,
+ 0, 0, 28, 7, 0, 28, 14, 0, 28, 21, 0, 28,
+ 28, 0, 28, 28, 0, 21, 28, 0, 14, 28, 0, 7,
+ 28, 0, 0, 28, 7, 0, 28, 14, 0, 28, 21, 0,
+ 28, 28, 0, 21, 28, 0, 14, 28, 0, 7, 28, 0,
+ 0, 28, 0, 0, 28, 7, 0, 28, 14, 0, 28, 21,
+ 0, 28, 28, 0, 21, 28, 0, 14, 28, 0, 7, 28,
+ 14, 14, 28, 17, 14, 28, 21, 14, 28, 24, 14, 28,
+ 28, 14, 28, 28, 14, 24, 28, 14, 21, 28, 14, 17,
+ 28, 14, 14, 28, 17, 14, 28, 21, 14, 28, 24, 14,
+ 28, 28, 14, 24, 28, 14, 21, 28, 14, 17, 28, 14,
+ 14, 28, 14, 14, 28, 17, 14, 28, 21, 14, 28, 24,
+ 14, 28, 28, 14, 24, 28, 14, 21, 28, 14, 17, 28,
+ 20, 20, 28, 22, 20, 28, 24, 20, 28, 26, 20, 28,
+ 28, 20, 28, 28, 20, 26, 28, 20, 24, 28, 20, 22,
+ 28, 20, 20, 28, 22, 20, 28, 24, 20, 28, 26, 20,
+ 28, 28, 20, 26, 28, 20, 24, 28, 20, 22, 28, 20,
+ 20, 28, 20, 20, 28, 22, 20, 28, 24, 20, 28, 26,
+ 20, 28, 28, 20, 26, 28, 20, 24, 28, 20, 22, 28,
+ 0, 0, 16, 4, 0, 16, 8, 0, 16, 12, 0, 16,
+ 16, 0, 16, 16, 0, 12, 16, 0, 8, 16, 0, 4,
+ 16, 0, 0, 16, 4, 0, 16, 8, 0, 16, 12, 0,
+ 16, 16, 0, 12, 16, 0, 8, 16, 0, 4, 16, 0,
+ 0, 16, 0, 0, 16, 4, 0, 16, 8, 0, 16, 12,
+ 0, 16, 16, 0, 12, 16, 0, 8, 16, 0, 4, 16,
+ 8, 8, 16, 10, 8, 16, 12, 8, 16, 14, 8, 16,
+ 16, 8, 16, 16, 8, 14, 16, 8, 12, 16, 8, 10,
+ 16, 8, 8, 16, 10, 8, 16, 12, 8, 16, 14, 8,
+ 16, 16, 8, 14, 16, 8, 12, 16, 8, 10, 16, 8,
+ 8, 16, 8, 8, 16, 10, 8, 16, 12, 8, 16, 14,
+ 8, 16, 16, 8, 14, 16, 8, 12, 16, 8, 10, 16,
+ 11, 11, 16, 12, 11, 16, 13, 11, 16, 15, 11, 16,
+ 16, 11, 16, 16, 11, 15, 16, 11, 13, 16, 11, 12,
+ 16, 11, 11, 16, 12, 11, 16, 13, 11, 16, 15, 11,
+ 16, 16, 11, 15, 16, 11, 13, 16, 11, 12, 16, 11,
+ 11, 16, 11, 11, 16, 12, 11, 16, 13, 11, 16, 15,
+ 11, 16, 16, 11, 15, 16, 11, 13, 16, 11, 12, 16,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+};
+#endif /* NEED_SAVED_CMAP */
+
+/*
+ * Standard VGA versions of the register access functions.
+ */
+static void
+stdWriteCrtc(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+ outb(hwp->IOBase + hwp->PIOOffset + VGA_CRTC_INDEX_OFFSET, index);
+ outb(hwp->IOBase + hwp->PIOOffset + VGA_CRTC_DATA_OFFSET, value);
+}
+
+static CARD8
+stdReadCrtc(vgaHWPtr hwp, CARD8 index)
+{
+ outb(hwp->IOBase + hwp->PIOOffset + VGA_CRTC_INDEX_OFFSET, index);
+ return inb(hwp->IOBase + hwp->PIOOffset + VGA_CRTC_DATA_OFFSET);
+}
+
+static void
+stdWriteGr(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+ outb(hwp->PIOOffset + VGA_GRAPH_INDEX, index);
+ outb(hwp->PIOOffset + VGA_GRAPH_DATA, value);
+}
+
+static CARD8
+stdReadGr(vgaHWPtr hwp, CARD8 index)
+{
+ outb(hwp->PIOOffset + VGA_GRAPH_INDEX, index);
+ return inb(hwp->PIOOffset + VGA_GRAPH_DATA);
+}
+
+static void
+stdWriteSeq(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+ outb(hwp->PIOOffset + VGA_SEQ_INDEX, index);
+ outb(hwp->PIOOffset + VGA_SEQ_DATA, value);
+}
+
+static CARD8
+stdReadSeq(vgaHWPtr hwp, CARD8 index)
+{
+ outb(hwp->PIOOffset + VGA_SEQ_INDEX, index);
+ return inb(hwp->PIOOffset + VGA_SEQ_DATA);
+}
+
+static CARD8
+stdReadST00(vgaHWPtr hwp)
+{
+ return inb(hwp->PIOOffset + VGA_IN_STAT_0);
+}
+
+static CARD8
+stdReadST01(vgaHWPtr hwp)
+{
+ return inb(hwp->IOBase + hwp->PIOOffset + VGA_IN_STAT_1_OFFSET);
+}
+
+static CARD8
+stdReadFCR(vgaHWPtr hwp)
+{
+ return inb(hwp->PIOOffset + VGA_FEATURE_R);
+}
+
+static void
+stdWriteFCR(vgaHWPtr hwp, CARD8 value)
+{
+ outb(hwp->IOBase + hwp->PIOOffset + VGA_FEATURE_W_OFFSET,value);
+}
+
+static void
+stdWriteAttr(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+ if (hwp->paletteEnabled)
+ index &= ~0x20;
+ else
+ index |= 0x20;
+
+ (void) inb(hwp->IOBase + hwp->PIOOffset + VGA_IN_STAT_1_OFFSET);
+ outb(hwp->PIOOffset + VGA_ATTR_INDEX, index);
+ outb(hwp->PIOOffset + VGA_ATTR_DATA_W, value);
+}
+
+static CARD8
+stdReadAttr(vgaHWPtr hwp, CARD8 index)
+{
+ if (hwp->paletteEnabled)
+ index &= ~0x20;
+ else
+ index |= 0x20;
+
+ (void) inb(hwp->IOBase + hwp->PIOOffset + VGA_IN_STAT_1_OFFSET);
+ outb(hwp->PIOOffset + VGA_ATTR_INDEX, index);
+ return inb(hwp->PIOOffset + VGA_ATTR_DATA_R);
+}
+
+static void
+stdWriteMiscOut(vgaHWPtr hwp, CARD8 value)
+{
+ outb(hwp->PIOOffset + VGA_MISC_OUT_W, value);
+}
+
+static CARD8
+stdReadMiscOut(vgaHWPtr hwp)
+{
+ return inb(hwp->PIOOffset + VGA_MISC_OUT_R);
+}
+
+static void
+stdEnablePalette(vgaHWPtr hwp)
+{
+ (void) inb(hwp->IOBase + hwp->PIOOffset + VGA_IN_STAT_1_OFFSET);
+ outb(hwp->PIOOffset + VGA_ATTR_INDEX, 0x00);
+ hwp->paletteEnabled = TRUE;
+}
+
+static void
+stdDisablePalette(vgaHWPtr hwp)
+{
+ (void) inb(hwp->IOBase + hwp->PIOOffset + VGA_IN_STAT_1_OFFSET);
+ outb(hwp->PIOOffset + VGA_ATTR_INDEX, 0x20);
+ hwp->paletteEnabled = FALSE;
+}
+
+static void
+stdWriteDacMask(vgaHWPtr hwp, CARD8 value)
+{
+ outb(hwp->PIOOffset + VGA_DAC_MASK, value);
+}
+
+static CARD8
+stdReadDacMask(vgaHWPtr hwp)
+{
+ return inb(hwp->PIOOffset + VGA_DAC_MASK);
+}
+
+static void
+stdWriteDacReadAddr(vgaHWPtr hwp, CARD8 value)
+{
+ outb(hwp->PIOOffset + VGA_DAC_READ_ADDR, value);
+}
+
+static void
+stdWriteDacWriteAddr(vgaHWPtr hwp, CARD8 value)
+{
+ outb(hwp->PIOOffset + VGA_DAC_WRITE_ADDR, value);
+}
+
+static void
+stdWriteDacData(vgaHWPtr hwp, CARD8 value)
+{
+ outb(hwp->PIOOffset + VGA_DAC_DATA, value);
+}
+
+static CARD8
+stdReadDacData(vgaHWPtr hwp)
+{
+ return inb(hwp->PIOOffset + VGA_DAC_DATA);
+}
+
+static CARD8
+stdReadEnable(vgaHWPtr hwp)
+{
+ return inb(hwp->PIOOffset + VGA_ENABLE);
+}
+
+static void
+stdWriteEnable(vgaHWPtr hwp, CARD8 value)
+{
+ outb(hwp->PIOOffset + VGA_ENABLE, value);
+}
+
+void
+vgaHWSetStdFuncs(vgaHWPtr hwp)
+{
+ hwp->writeCrtc = stdWriteCrtc;
+ hwp->readCrtc = stdReadCrtc;
+ hwp->writeGr = stdWriteGr;
+ hwp->readGr = stdReadGr;
+ hwp->readST00 = stdReadST00;
+ hwp->readST01 = stdReadST01;
+ hwp->readFCR = stdReadFCR;
+ hwp->writeFCR = stdWriteFCR;
+ hwp->writeAttr = stdWriteAttr;
+ hwp->readAttr = stdReadAttr;
+ hwp->writeSeq = stdWriteSeq;
+ hwp->readSeq = stdReadSeq;
+ hwp->writeMiscOut = stdWriteMiscOut;
+ hwp->readMiscOut = stdReadMiscOut;
+ hwp->enablePalette = stdEnablePalette;
+ hwp->disablePalette = stdDisablePalette;
+ hwp->writeDacMask = stdWriteDacMask;
+ hwp->readDacMask = stdReadDacMask;
+ hwp->writeDacWriteAddr = stdWriteDacWriteAddr;
+ hwp->writeDacReadAddr = stdWriteDacReadAddr;
+ hwp->writeDacData = stdWriteDacData;
+ hwp->readDacData = stdReadDacData;
+ hwp->PIOOffset = 0;
+ hwp->readEnable = stdReadEnable;
+ hwp->writeEnable = stdWriteEnable;
+}
+
+/*
+ * MMIO versions of the register access functions. These require
+ * hwp->MemBase to be set in such a way that when the standard VGA port
+ * adderss is added the correct memory address results.
+ */
+
+#define minb(p) MMIO_IN8(hwp->MMIOBase, (hwp->MMIOOffset + (p)))
+#define moutb(p,v) MMIO_OUT8(hwp->MMIOBase, (hwp->MMIOOffset + (p)),(v))
+
+static void
+mmioWriteCrtc(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+ moutb(hwp->IOBase + VGA_CRTC_INDEX_OFFSET, index);
+ moutb(hwp->IOBase + VGA_CRTC_DATA_OFFSET, value);
+}
+
+static CARD8
+mmioReadCrtc(vgaHWPtr hwp, CARD8 index)
+{
+ moutb(hwp->IOBase + VGA_CRTC_INDEX_OFFSET, index);
+ return minb(hwp->IOBase + VGA_CRTC_DATA_OFFSET);
+}
+
+static void
+mmioWriteGr(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+ moutb(VGA_GRAPH_INDEX, index);
+ moutb(VGA_GRAPH_DATA, value);
+}
+
+static CARD8
+mmioReadGr(vgaHWPtr hwp, CARD8 index)
+{
+ moutb(VGA_GRAPH_INDEX, index);
+ return minb(VGA_GRAPH_DATA);
+}
+
+static void
+mmioWriteSeq(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+ moutb(VGA_SEQ_INDEX, index);
+ moutb(VGA_SEQ_DATA, value);
+}
+
+static CARD8
+mmioReadSeq(vgaHWPtr hwp, CARD8 index)
+{
+ moutb(VGA_SEQ_INDEX, index);
+ return minb(VGA_SEQ_DATA);
+}
+
+static CARD8
+mmioReadST00(vgaHWPtr hwp)
+{
+ return minb(VGA_IN_STAT_0);
+}
+
+static CARD8
+mmioReadST01(vgaHWPtr hwp)
+{
+ return minb(hwp->IOBase + VGA_IN_STAT_1_OFFSET);
+}
+
+static CARD8
+mmioReadFCR(vgaHWPtr hwp)
+{
+ return minb(VGA_FEATURE_R);
+}
+
+static void
+mmioWriteFCR(vgaHWPtr hwp, CARD8 value)
+{
+ moutb(hwp->IOBase + VGA_FEATURE_W_OFFSET,value);
+}
+
+static void
+mmioWriteAttr(vgaHWPtr hwp, CARD8 index, CARD8 value)
+{
+ if (hwp->paletteEnabled)
+ index &= ~0x20;
+ else
+ index |= 0x20;
+
+ (void) minb(hwp->IOBase + VGA_IN_STAT_1_OFFSET);
+ moutb(VGA_ATTR_INDEX, index);
+ moutb(VGA_ATTR_DATA_W, value);
+}
+
+static CARD8
+mmioReadAttr(vgaHWPtr hwp, CARD8 index)
+{
+ if (hwp->paletteEnabled)
+ index &= ~0x20;
+ else
+ index |= 0x20;
+
+ (void) minb(hwp->IOBase + VGA_IN_STAT_1_OFFSET);
+ moutb(VGA_ATTR_INDEX, index);
+ return minb(VGA_ATTR_DATA_R);
+}
+
+static void
+mmioWriteMiscOut(vgaHWPtr hwp, CARD8 value)
+{
+ moutb(VGA_MISC_OUT_W, value);
+}
+
+static CARD8
+mmioReadMiscOut(vgaHWPtr hwp)
+{
+ return minb(VGA_MISC_OUT_R);
+}
+
+static void
+mmioEnablePalette(vgaHWPtr hwp)
+{
+ (void) minb(hwp->IOBase + VGA_IN_STAT_1_OFFSET);
+ moutb(VGA_ATTR_INDEX, 0x00);
+ hwp->paletteEnabled = TRUE;
+}
+
+static void
+mmioDisablePalette(vgaHWPtr hwp)
+{
+ (void) minb(hwp->IOBase + VGA_IN_STAT_1_OFFSET);
+ moutb(VGA_ATTR_INDEX, 0x20);
+ hwp->paletteEnabled = FALSE;
+}
+
+static void
+mmioWriteDacMask(vgaHWPtr hwp, CARD8 value)
+{
+ moutb(VGA_DAC_MASK, value);
+}
+
+static CARD8
+mmioReadDacMask(vgaHWPtr hwp)
+{
+ return minb(VGA_DAC_MASK);
+}
+
+static void
+mmioWriteDacReadAddr(vgaHWPtr hwp, CARD8 value)
+{
+ moutb(VGA_DAC_READ_ADDR, value);
+}
+
+static void
+mmioWriteDacWriteAddr(vgaHWPtr hwp, CARD8 value)
+{
+ moutb(VGA_DAC_WRITE_ADDR, value);
+}
+
+static void
+mmioWriteDacData(vgaHWPtr hwp, CARD8 value)
+{
+ moutb(VGA_DAC_DATA, value);
+}
+
+static CARD8
+mmioReadDacData(vgaHWPtr hwp)
+{
+ return minb(VGA_DAC_DATA);
+}
+
+static CARD8
+mmioReadEnable(vgaHWPtr hwp)
+{
+ return minb(VGA_ENABLE);
+}
+
+static void
+mmioWriteEnable(vgaHWPtr hwp, CARD8 value)
+{
+ moutb(VGA_ENABLE, value);
+}
+
+void
+vgaHWSetMmioFuncs(vgaHWPtr hwp, CARD8 *base, int offset)
+{
+ hwp->writeCrtc = mmioWriteCrtc;
+ hwp->readCrtc = mmioReadCrtc;
+ hwp->writeGr = mmioWriteGr;
+ hwp->readGr = mmioReadGr;
+ hwp->readST00 = mmioReadST00;
+ hwp->readST01 = mmioReadST01;
+ hwp->readFCR = mmioReadFCR;
+ hwp->writeFCR = mmioWriteFCR;
+ hwp->writeAttr = mmioWriteAttr;
+ hwp->readAttr = mmioReadAttr;
+ hwp->writeSeq = mmioWriteSeq;
+ hwp->readSeq = mmioReadSeq;
+ hwp->writeMiscOut = mmioWriteMiscOut;
+ hwp->readMiscOut = mmioReadMiscOut;
+ hwp->enablePalette = mmioEnablePalette;
+ hwp->disablePalette = mmioDisablePalette;
+ hwp->writeDacMask = mmioWriteDacMask;
+ hwp->readDacMask = mmioReadDacMask;
+ hwp->writeDacWriteAddr = mmioWriteDacWriteAddr;
+ hwp->writeDacReadAddr = mmioWriteDacReadAddr;
+ hwp->writeDacData = mmioWriteDacData;
+ hwp->readDacData = mmioReadDacData;
+ hwp->MMIOBase = base;
+ hwp->MMIOOffset = offset;
+ hwp->readEnable = mmioReadEnable;
+ hwp->writeEnable = mmioWriteEnable;
+}
+
+/*
+ * vgaHWProtect --
+ * Protect VGA registers and memory from corruption during loads.
+ */
+
+void
+vgaHWProtect(ScrnInfoPtr pScrn, Bool on)
+{
+ vgaHWPtr hwp = VGAHWPTR(pScrn);
+
+ unsigned char tmp;
+
+ if (pScrn->vtSema) {
+ if (on) {
+ /*
+ * Turn off screen and disable sequencer.
+ */
+ tmp = hwp->readSeq(hwp, 0x01);
+
+ vgaHWSeqReset(hwp, TRUE); /* start synchronous reset */
+ hwp->writeSeq(hwp, 0x01, tmp | 0x20); /* disable the display */
+
+ hwp->enablePalette(hwp);
+ } else {
+ /*
+ * Reenable sequencer, then turn on screen.
+ */
+
+ tmp = hwp->readSeq(hwp, 0x01);
+
+ hwp->writeSeq(hwp, 0x01, tmp & ~0x20); /* reenable display */
+ vgaHWSeqReset(hwp, FALSE); /* clear synchronousreset */
+
+ hwp->disablePalette(hwp);
+ }
+ }
+}
+
+vgaHWProtectProc *vgaHWProtectWeak(void) {
+ return vgaHWProtect;
+}
+
+/*
+ * vgaHWBlankScreen -- blank the screen.
+ */
+
+void
+vgaHWBlankScreen(ScrnInfoPtr pScrn, Bool on)
+{
+ vgaHWPtr hwp = VGAHWPTR(pScrn);
+ unsigned char scrn;
+
+ scrn = hwp->readSeq(hwp, 0x01);
+
+ if (on) {
+ scrn &= ~0x20; /* enable screen */
+ } else {
+ scrn |= 0x20; /* blank screen */
+ }
+
+ vgaHWSeqReset(hwp, TRUE);
+ hwp->writeSeq(hwp, 0x01, scrn); /* change mode */
+ vgaHWSeqReset(hwp, FALSE);
+}
+
+vgaHWBlankScreenProc *vgaHWBlankScreenWeak(void) {
+ return vgaHWBlankScreen;
+}
+
+/*
+ * vgaHWSaveScreen -- blank the screen.
+ */
+
+Bool
+vgaHWSaveScreen(ScreenPtr pScreen, int mode)
+{
+ ScrnInfoPtr pScrn = NULL;
+ Bool on;
+
+ if (pScreen != NULL)
+ pScrn = xf86Screens[pScreen->myNum];
+
+ on = xf86IsUnblank(mode);
+
+#if 0
+ if (on)
+ SetTimeSinceLastInputEvent();
+#endif
+
+ if ((pScrn != NULL) && pScrn->vtSema) {
+ vgaHWBlankScreen(pScrn, on);
+ }
+ return (TRUE);
+}
+
+
+/*
+ * vgaHWDPMSSet -- Sets VESA Display Power Management Signaling (DPMS) Mode
+ *
+ * This generic VGA function can only set the Off and On modes. If the
+ * Standby and Suspend modes are to be supported, a chip specific replacement
+ * for this function must be written.
+ */
+
+void
+vgaHWDPMSSet(ScrnInfoPtr pScrn, int PowerManagementMode, int flags)
+{
+ unsigned char seq1 = 0, crtc17 = 0;
+ vgaHWPtr hwp = VGAHWPTR(pScrn);
+
+ if (!pScrn->vtSema) return;
+
+ switch (PowerManagementMode) {
+ case DPMSModeOn:
+ /* Screen: On; HSync: On, VSync: On */
+ seq1 = 0x00;
+ crtc17 = 0x80;
+ break;
+ case DPMSModeStandby:
+ /* Screen: Off; HSync: Off, VSync: On -- Not Supported */
+ seq1 = 0x20;
+ crtc17 = 0x80;
+ break;
+ case DPMSModeSuspend:
+ /* Screen: Off; HSync: On, VSync: Off -- Not Supported */
+ seq1 = 0x20;
+ crtc17 = 0x80;
+ break;
+ case DPMSModeOff:
+ /* Screen: Off; HSync: Off, VSync: Off */
+ seq1 = 0x20;
+ crtc17 = 0x00;
+ break;
+ }
+ hwp->writeSeq(hwp, 0x00, 0x01); /* Synchronous Reset */
+ seq1 |= hwp->readSeq(hwp, 0x01) & ~0x20;
+ hwp->writeSeq(hwp, 0x01, seq1);
+ crtc17 |= hwp->readCrtc(hwp, 0x17) & ~0x80;
+ usleep(10000);
+ hwp->writeCrtc(hwp, 0x17, crtc17);
+ hwp->writeSeq(hwp, 0x00, 0x03); /* End Reset */
+}
+
+
+/*
+ * vgaHWSeqReset
+ * perform a sequencer reset.
+ */
+
+void
+vgaHWSeqReset(vgaHWPtr hwp, Bool start)
+{
+ if (start)
+ hwp->writeSeq(hwp, 0x00, 0x01); /* Synchronous Reset */
+ else
+ hwp->writeSeq(hwp, 0x00, 0x03); /* End Reset */
+}
+
+
+void
+vgaHWRestoreFonts(ScrnInfoPtr scrninfp, vgaRegPtr restore)
+{
+#if SAVE_TEXT || SAVE_FONT1 || SAVE_FONT2
+ vgaHWPtr hwp = VGAHWPTR(scrninfp);
+ int savedIOBase;
+ unsigned char miscOut, attr10, gr1, gr3, gr4, gr5, gr6, gr8, seq2, seq4;
+ Bool doMap = FALSE;
+
+ /* If nothing to do, return now */
+ if (!hwp->FontInfo1 && !hwp->FontInfo2 && !hwp->TextInfo)
+ return;
+
+ if (hwp->Base == NULL) {
+ doMap = TRUE;
+ if (!vgaHWMapMem(scrninfp)) {
+ xf86DrvMsg(scrninfp->scrnIndex, X_ERROR,
+ "vgaHWRestoreFonts: vgaHWMapMem() failed\n");
+ return;
+ }
+ }
+
+ /* save the registers that are needed here */
+ miscOut = hwp->readMiscOut(hwp);
+ attr10 = hwp->readAttr(hwp, 0x10);
+ gr1 = hwp->readGr(hwp, 0x01);
+ gr3 = hwp->readGr(hwp, 0x03);
+ gr4 = hwp->readGr(hwp, 0x04);
+ gr5 = hwp->readGr(hwp, 0x05);
+ gr6 = hwp->readGr(hwp, 0x06);
+ gr8 = hwp->readGr(hwp, 0x08);
+ seq2 = hwp->readSeq(hwp, 0x02);
+ seq4 = hwp->readSeq(hwp, 0x04);
+
+ /* save hwp->IOBase and temporarily set it for colour mode */
+ savedIOBase = hwp->IOBase;
+ hwp->IOBase = VGA_IOBASE_COLOR;
+
+ /* Force into colour mode */
+ hwp->writeMiscOut(hwp, miscOut | 0x01);
+
+ vgaHWBlankScreen(scrninfp, FALSE);
+
+ /*
+ * here we temporarily switch to 16 colour planar mode, to simply
+ * copy the font-info and saved text.
+ *
+ * BUG ALERT: The (S)VGA's segment-select register MUST be set correctly!
+ */
+#if 0
+ hwp->writeAttr(hwp, 0x10, 0x01); /* graphics mode */
+#endif
+
+ hwp->writeSeq(hwp, 0x04, 0x06); /* enable plane graphics */
+ hwp->writeGr(hwp, 0x05, 0x00); /* write mode 0, read mode 0 */
+ hwp->writeGr(hwp, 0x06, 0x05); /* set graphics */
+
+ if (scrninfp->depth == 4) {
+ /* GJA */
+ hwp->writeGr(hwp, 0x03, 0x00); /* don't rotate, write unmodified */
+ hwp->writeGr(hwp, 0x08, 0xFF); /* write all bits in a byte */
+ hwp->writeGr(hwp, 0x01, 0x00); /* all planes come from CPU */
+ }
+
+#if SAVE_FONT1
+ if (hwp->FontInfo1) {
+ hwp->writeSeq(hwp, 0x02, 0x04); /* write to plane 2 */
+ hwp->writeGr(hwp, 0x04, 0x02); /* read plane 2 */
+ slowbcopy_tobus(hwp->FontInfo1, hwp->Base, FONT_AMOUNT);
+ }
+#endif
+
+#if SAVE_FONT2
+ if (hwp->FontInfo2) {
+ hwp->writeSeq(hwp, 0x02, 0x08); /* write to plane 3 */
+ hwp->writeGr(hwp, 0x04, 0x03); /* read plane 3 */
+ slowbcopy_tobus(hwp->FontInfo2, hwp->Base, FONT_AMOUNT);
+ }
+#endif
+
+#if SAVE_TEXT
+ if (hwp->TextInfo) {
+ hwp->writeSeq(hwp, 0x02, 0x01); /* write to plane 0 */
+ hwp->writeGr(hwp, 0x04, 0x00); /* read plane 0 */
+ slowbcopy_tobus(hwp->TextInfo, hwp->Base, TEXT_AMOUNT);
+ hwp->writeSeq(hwp, 0x02, 0x02); /* write to plane 1 */
+ hwp->writeGr(hwp, 0x04, 0x01); /* read plane 1 */
+ slowbcopy_tobus((unsigned char *)hwp->TextInfo + TEXT_AMOUNT,
+ hwp->Base, TEXT_AMOUNT);
+ }
+#endif
+
+ vgaHWBlankScreen(scrninfp, TRUE);
+
+ /* restore the registers that were changed */
+ hwp->writeMiscOut(hwp, miscOut);
+ hwp->writeAttr(hwp, 0x10, attr10);
+ hwp->writeGr(hwp, 0x01, gr1);
+ hwp->writeGr(hwp, 0x03, gr3);
+ hwp->writeGr(hwp, 0x04, gr4);
+ hwp->writeGr(hwp, 0x05, gr5);
+ hwp->writeGr(hwp, 0x06, gr6);
+ hwp->writeGr(hwp, 0x08, gr8);
+ hwp->writeSeq(hwp, 0x02, seq2);
+ hwp->writeSeq(hwp, 0x04, seq4);
+ hwp->IOBase = savedIOBase;
+
+ if (doMap)
+ vgaHWUnmapMem(scrninfp);
+
+#endif /* SAVE_TEXT || SAVE_FONT1 || SAVE_FONT2 */
+}
+
+
+void
+vgaHWRestoreMode(ScrnInfoPtr scrninfp, vgaRegPtr restore)
+{
+ vgaHWPtr hwp = VGAHWPTR(scrninfp);
+ int i;
+
+ if (restore->MiscOutReg & 0x01)
+ hwp->IOBase = VGA_IOBASE_COLOR;
+ else
+ hwp->IOBase = VGA_IOBASE_MONO;
+
+ hwp->writeMiscOut(hwp, restore->MiscOutReg);
+
+ for (i = 1; i < restore->numSequencer; i++)
+ hwp->writeSeq(hwp, i, restore->Sequencer[i]);
+
+ /* Ensure CRTC registers 0-7 are unlocked by clearing bit 7 of CRTC[17] */
+ hwp->writeCrtc(hwp, 17, restore->CRTC[17] & ~0x80);
+
+ for (i = 0; i < restore->numCRTC; i++)
+ hwp->writeCrtc(hwp, i, restore->CRTC[i]);
+
+ for (i = 0; i < restore->numGraphics; i++)
+ hwp->writeGr(hwp, i, restore->Graphics[i]);
+
+ hwp->enablePalette(hwp);
+ for (i = 0; i < restore->numAttribute; i++)
+ hwp->writeAttr(hwp, i, restore->Attribute[i]);
+ hwp->disablePalette(hwp);
+}
+
+
+void
+vgaHWRestoreColormap(ScrnInfoPtr scrninfp, vgaRegPtr restore)
+{
+ vgaHWPtr hwp = VGAHWPTR(scrninfp);
+ int i;
+
+#if 0
+ hwp->enablePalette(hwp);
+#endif
+
+ hwp->writeDacMask(hwp, 0xFF);
+ hwp->writeDacWriteAddr(hwp, 0x00);
+ for (i = 0; i < 768; i++) {
+ hwp->writeDacData(hwp, restore->DAC[i]);
+ DACDelay(hwp);
+ }
+
+ hwp->disablePalette(hwp);
+}
+
+
+/*
+ * vgaHWRestore --
+ * restore the VGA state
+ */
+
+void
+vgaHWRestore(ScrnInfoPtr scrninfp, vgaRegPtr restore, int flags)
+{
+ if (flags & VGA_SR_MODE)
+ vgaHWRestoreMode(scrninfp, restore);
+
+ if (flags & VGA_SR_FONTS)
+ vgaHWRestoreFonts(scrninfp, restore);
+
+ if (flags & VGA_SR_CMAP)
+ vgaHWRestoreColormap(scrninfp, restore);
+}
+
+void
+vgaHWSaveFonts(ScrnInfoPtr scrninfp, vgaRegPtr save)
+{
+#if SAVE_TEXT || SAVE_FONT1 || SAVE_FONT2
+ vgaHWPtr hwp = VGAHWPTR(scrninfp);
+ int savedIOBase;
+ unsigned char miscOut, attr10, gr4, gr5, gr6, seq2, seq4;
+ Bool doMap = FALSE;
+
+ if (hwp->Base == NULL) {
+ doMap = TRUE;
+ if (!vgaHWMapMem(scrninfp)) {
+ xf86DrvMsg(scrninfp->scrnIndex, X_ERROR,
+ "vgaHWSaveFonts: vgaHWMapMem() failed\n");
+ return;
+ }
+ }
+
+ /* If in graphics mode, don't save anything */
+ attr10 = hwp->readAttr(hwp, 0x10);
+ if (attr10 & 0x01)
+ return;
+
+ /* save the registers that are needed here */
+ miscOut = hwp->readMiscOut(hwp);
+ gr4 = hwp->readGr(hwp, 0x04);
+ gr5 = hwp->readGr(hwp, 0x05);
+ gr6 = hwp->readGr(hwp, 0x06);
+ seq2 = hwp->readSeq(hwp, 0x02);
+ seq4 = hwp->readSeq(hwp, 0x04);
+
+ /* save hwp->IOBase and temporarily set it for colour mode */
+ savedIOBase = hwp->IOBase;
+ hwp->IOBase = VGA_IOBASE_COLOR;
+
+ /* Force into colour mode */
+ hwp->writeMiscOut(hwp, miscOut | 0x01);
+
+ vgaHWBlankScreen(scrninfp, FALSE);
+
+ /*
+ * get the character sets, and text screen if required
+ */
+ /*
+ * Here we temporarily switch to 16 colour planar mode, to simply
+ * copy the font-info
+ *
+ * BUG ALERT: The (S)VGA's segment-select register MUST be set correctly!
+ */
+#if 0
+ hwp->writeAttr(hwp, 0x10, 0x01); /* graphics mode */
+#endif
+
+ hwp->writeSeq(hwp, 0x04, 0x06); /* enable plane graphics */
+ hwp->writeGr(hwp, 0x05, 0x00); /* write mode 0, read mode 0 */
+ hwp->writeGr(hwp, 0x06, 0x05); /* set graphics */
+
+#if SAVE_FONT1
+ if (hwp->FontInfo1 || (hwp->FontInfo1 = xalloc(FONT_AMOUNT))) {
+ hwp->writeSeq(hwp, 0x02, 0x04); /* write to plane 2 */
+ hwp->writeGr(hwp, 0x04, 0x02); /* read plane 2 */
+ slowbcopy_frombus(hwp->Base, hwp->FontInfo1, FONT_AMOUNT);
+ }
+#endif /* SAVE_FONT1 */
+#if SAVE_FONT2
+ if (hwp->FontInfo2 || (hwp->FontInfo2 = xalloc(FONT_AMOUNT))) {
+ hwp->writeSeq(hwp, 0x02, 0x08); /* write to plane 3 */
+ hwp->writeGr(hwp, 0x04, 0x03); /* read plane 3 */
+ slowbcopy_frombus(hwp->Base, hwp->FontInfo2, FONT_AMOUNT);
+ }
+#endif /* SAVE_FONT2 */
+#if SAVE_TEXT
+ if (hwp->TextInfo || (hwp->TextInfo = xalloc(2 * TEXT_AMOUNT))) {
+ hwp->writeSeq(hwp, 0x02, 0x01); /* write to plane 0 */
+ hwp->writeGr(hwp, 0x04, 0x00); /* read plane 0 */
+ slowbcopy_frombus(hwp->Base, hwp->TextInfo, TEXT_AMOUNT);
+ hwp->writeSeq(hwp, 0x02, 0x02); /* write to plane 1 */
+ hwp->writeGr(hwp, 0x04, 0x01); /* read plane 1 */
+ slowbcopy_frombus(hwp->Base,
+ (unsigned char *)hwp->TextInfo + TEXT_AMOUNT, TEXT_AMOUNT);
+ }
+#endif /* SAVE_TEXT */
+
+ /* Restore clobbered registers */
+ hwp->writeAttr(hwp, 0x10, attr10);
+ hwp->writeSeq(hwp, 0x02, seq2);
+ hwp->writeSeq(hwp, 0x04, seq4);
+ hwp->writeGr(hwp, 0x04, gr4);
+ hwp->writeGr(hwp, 0x05, gr5);
+ hwp->writeGr(hwp, 0x06, gr6);
+ hwp->writeMiscOut(hwp, miscOut);
+ hwp->IOBase = savedIOBase;
+
+ vgaHWBlankScreen(scrninfp, TRUE);
+
+ if (doMap)
+ vgaHWUnmapMem(scrninfp);
+
+#endif /* SAVE_TEXT || SAVE_FONT1 || SAVE_FONT2 */
+}
+
+void
+vgaHWSaveMode(ScrnInfoPtr scrninfp, vgaRegPtr save)
+{
+ vgaHWPtr hwp = VGAHWPTR(scrninfp);
+ int i;
+
+ save->MiscOutReg = hwp->readMiscOut(hwp);
+ if (save->MiscOutReg & 0x01)
+ hwp->IOBase = VGA_IOBASE_COLOR;
+ else
+ hwp->IOBase = VGA_IOBASE_MONO;
+
+ for (i = 0; i < save->numCRTC; i++) {
+ save->CRTC[i] = hwp->readCrtc(hwp, i);
+#ifdef DEBUG
+ ErrorF("CRTC[0x%02x] = 0x%02x\n", i, save->CRTC[i]);
+#endif
+ }
+
+ hwp->enablePalette(hwp);
+ for (i = 0; i < save->numAttribute; i++) {
+ save->Attribute[i] = hwp->readAttr(hwp, i);
+#ifdef DEBUG
+ ErrorF("Attribute[0x%02x] = 0x%02x\n", i, save->Attribute[i]);
+#endif
+ }
+ hwp->disablePalette(hwp);
+
+ for (i = 0; i < save->numGraphics; i++) {
+ save->Graphics[i] = hwp->readGr(hwp, i);
+#ifdef DEBUG
+ ErrorF("Graphics[0x%02x] = 0x%02x\n", i, save->Graphics[i]);
+#endif
+ }
+
+ for (i = 1; i < save->numSequencer; i++) {
+ save->Sequencer[i] = hwp->readSeq(hwp, i);
+#ifdef DEBUG
+ ErrorF("Sequencer[0x%02x] = 0x%02x\n", i, save->Sequencer[i]);
+#endif
+ }
+}
+
+
+void
+vgaHWSaveColormap(ScrnInfoPtr scrninfp, vgaRegPtr save)
+{
+ vgaHWPtr hwp = VGAHWPTR(scrninfp);
+ Bool readError = FALSE;
+ int i;
+
+#ifdef NEED_SAVED_CMAP
+ /*
+ * Some ET4000 chips from 1991 have a HW bug that prevents the reading
+ * of the color lookup table. Mask rev 9042EAI is known to have this bug.
+ *
+ * If the colourmap is not readable, we set the saved map to a default
+ * map (taken from Ferraro's "Programmer's Guide to the EGA and VGA
+ * Cards" 2nd ed).
+ */
+
+ /* Only save it once */
+ if (hwp->cmapSaved)
+ return;
+
+#if 0
+ hwp->enablePalette(hwp);
+#endif
+
+ hwp->writeDacMask(hwp, 0xFF);
+
+ /*
+ * check if we can read the lookup table
+ */
+ hwp->writeDacReadAddr(hwp, 0x00);
+ for (i = 0; i < 6; i++) {
+ save->DAC[i] = hwp->readDacData(hwp);
+#ifdef DEBUG
+ switch (i % 3) {
+ case 0:
+ ErrorF("DAC[0x%02x] = 0x%02x, ", i / 3, save->DAC[i]);
+ break;
+ case 1:
+ ErrorF("0x%02x, ", save->DAC[i]);
+ break;
+ case 2:
+ ErrorF("0x%02x\n", save->DAC[i]);
+ }
+#endif
+ }
+
+ /*
+ * Check if we can read the palette -
+ * use foreground color to prevent flashing.
+ */
+ hwp->writeDacWriteAddr(hwp, 0x01);
+ for (i = 3; i < 6; i++)
+ hwp->writeDacData(hwp, ~save->DAC[i] & DAC_TEST_MASK);
+ hwp->writeDacReadAddr(hwp, 0x01);
+ for (i = 3; i < 6; i++) {
+ if (hwp->readDacData(hwp) != (~save->DAC[i] & DAC_TEST_MASK))
+ readError = TRUE;
+ }
+ hwp->writeDacWriteAddr(hwp, 0x01);
+ for (i = 3; i < 6; i++)
+ hwp->writeDacData(hwp, save->DAC[i]);
+
+ if (readError) {
+ /*
+ * save the default lookup table
+ */
+ memmove(save->DAC, defaultDAC, 768);
+ xf86DrvMsg(scrninfp->scrnIndex, X_WARNING,
+ "Cannot read colourmap from VGA. Will restore with default\n");
+ } else {
+ /* save the colourmap */
+ hwp->writeDacReadAddr(hwp, 0x02);
+ for (i = 6; i < 768; i++) {
+ save->DAC[i] = hwp->readDacData(hwp);
+ DACDelay(hwp);
+#ifdef DEBUG
+ switch (i % 3) {
+ case 0:
+ ErrorF("DAC[0x%02x] = 0x%02x, ", i / 3, save->DAC[i]);
+ break;
+ case 1:
+ ErrorF("0x%02x, ", save->DAC[i]);
+ break;
+ case 2:
+ ErrorF("0x%02x\n", save->DAC[i]);
+ }
+#endif
+ }
+ }
+
+ hwp->disablePalette(hwp);
+ hwp->cmapSaved = TRUE;
+#endif
+}
+
+/*
+ * vgaHWSave --
+ * save the current VGA state
+ */
+
+void
+vgaHWSave(ScrnInfoPtr scrninfp, vgaRegPtr save, int flags)
+{
+ if (save == NULL)
+ return;
+
+ if (flags & VGA_SR_CMAP)
+ vgaHWSaveColormap(scrninfp, save);
+
+ if (flags & VGA_SR_MODE)
+ vgaHWSaveMode(scrninfp, save);
+
+ if (flags & VGA_SR_FONTS)
+ vgaHWSaveFonts(scrninfp, save);
+}
+
+
+/*
+ * vgaHWInit --
+ * Handle the initialization, etc. of a screen.
+ * Return FALSE on failure.
+ */
+
+Bool
+vgaHWInit(ScrnInfoPtr scrninfp, DisplayModePtr mode)
+{
+ unsigned int i;
+ vgaHWPtr hwp;
+ vgaRegPtr regp;
+ int depth = scrninfp->depth;
+
+ /*
+ * make sure the vgaHWRec is allocated
+ */
+ if (!vgaHWGetHWRec(scrninfp))
+ return FALSE;
+ hwp = VGAHWPTR(scrninfp);
+ regp = &hwp->ModeReg;
+
+ /*
+ * compute correct Hsync & Vsync polarity
+ */
+ if ((mode->Flags & (V_PHSYNC | V_NHSYNC))
+ && (mode->Flags & (V_PVSYNC | V_NVSYNC)))
+ {
+ regp->MiscOutReg = 0x23;
+ if (mode->Flags & V_NHSYNC) regp->MiscOutReg |= 0x40;
+ if (mode->Flags & V_NVSYNC) regp->MiscOutReg |= 0x80;
+ }
+ else
+ {
+ int VDisplay = mode->VDisplay;
+ if (mode->Flags & V_DBLSCAN)
+ VDisplay *= 2;
+ if (mode->VScan > 1)
+ VDisplay *= mode->VScan;
+ if (VDisplay < 400)
+ regp->MiscOutReg = 0xA3; /* +hsync -vsync */
+ else if (VDisplay < 480)
+ regp->MiscOutReg = 0x63; /* -hsync +vsync */
+ else if (VDisplay < 768)
+ regp->MiscOutReg = 0xE3; /* -hsync -vsync */
+ else
+ regp->MiscOutReg = 0x23; /* +hsync +vsync */
+ }
+
+ regp->MiscOutReg |= (mode->ClockIndex & 0x03) << 2;
+
+ /*
+ * Time Sequencer
+ */
+ if (depth == 4)
+ regp->Sequencer[0] = 0x02;
+ else
+ regp->Sequencer[0] = 0x00;
+ if (mode->Flags & V_CLKDIV2)
+ regp->Sequencer[1] = 0x09;
+ else
+ regp->Sequencer[1] = 0x01;
+ if (depth == 1)
+ regp->Sequencer[2] = 1 << BIT_PLANE;
+ else
+ regp->Sequencer[2] = 0x0F;
+ regp->Sequencer[3] = 0x00; /* Font select */
+ if (depth < 8)
+ regp->Sequencer[4] = 0x06; /* Misc */
+ else
+ regp->Sequencer[4] = 0x0E; /* Misc */
+
+ /*
+ * CRTC Controller
+ */
+ regp->CRTC[0] = (mode->CrtcHTotal >> 3) - 5;
+ regp->CRTC[1] = (mode->CrtcHDisplay >> 3) - 1;
+ regp->CRTC[2] = (mode->CrtcHBlankStart >> 3) - 1;
+ regp->CRTC[3] = (((mode->CrtcHBlankEnd >> 3) - 1) & 0x1F) | 0x80;
+ i = (((mode->CrtcHSkew << 2) + 0x10) & ~0x1F);
+ if (i < 0x80)
+ regp->CRTC[3] |= i;
+ regp->CRTC[4] = (mode->CrtcHSyncStart >> 3);
+ regp->CRTC[5] = ((((mode->CrtcHBlankEnd >> 3) - 1) & 0x20) << 2)
+ | (((mode->CrtcHSyncEnd >> 3)) & 0x1F);
+ regp->CRTC[6] = (mode->CrtcVTotal - 2) & 0xFF;
+ regp->CRTC[7] = (((mode->CrtcVTotal - 2) & 0x100) >> 8)
+ | (((mode->CrtcVDisplay - 1) & 0x100) >> 7)
+ | ((mode->CrtcVSyncStart & 0x100) >> 6)
+ | (((mode->CrtcVBlankStart - 1) & 0x100) >> 5)
+ | 0x10
+ | (((mode->CrtcVTotal - 2) & 0x200) >> 4)
+ | (((mode->CrtcVDisplay - 1) & 0x200) >> 3)
+ | ((mode->CrtcVSyncStart & 0x200) >> 2);
+ regp->CRTC[8] = 0x00;
+ regp->CRTC[9] = (((mode->CrtcVBlankStart - 1) & 0x200) >> 4) | 0x40;
+ if (mode->Flags & V_DBLSCAN)
+ regp->CRTC[9] |= 0x80;
+ if (mode->VScan >= 32)
+ regp->CRTC[9] |= 0x1F;
+ else if (mode->VScan > 1)
+ regp->CRTC[9] |= mode->VScan - 1;
+ regp->CRTC[10] = 0x00;
+ regp->CRTC[11] = 0x00;
+ regp->CRTC[12] = 0x00;
+ regp->CRTC[13] = 0x00;
+ regp->CRTC[14] = 0x00;
+ regp->CRTC[15] = 0x00;
+ regp->CRTC[16] = mode->CrtcVSyncStart & 0xFF;
+ regp->CRTC[17] = (mode->CrtcVSyncEnd & 0x0F) | 0x20;
+ regp->CRTC[18] = (mode->CrtcVDisplay - 1) & 0xFF;
+ regp->CRTC[19] = scrninfp->displayWidth >> 4; /* just a guess */
+ regp->CRTC[20] = 0x00;
+ regp->CRTC[21] = (mode->CrtcVBlankStart - 1) & 0xFF;
+ regp->CRTC[22] = (mode->CrtcVBlankEnd - 1) & 0xFF;
+ if (depth < 8)
+ regp->CRTC[23] = 0xE3;
+ else
+ regp->CRTC[23] = 0xC3;
+ regp->CRTC[24] = 0xFF;
+
+ vgaHWHBlankKGA(mode, regp, 0, KGA_FIX_OVERSCAN | KGA_ENABLE_ON_ZERO);
+ vgaHWVBlankKGA(mode, regp, 0, KGA_FIX_OVERSCAN | KGA_ENABLE_ON_ZERO);
+
+ /*
+ * Theory resumes here....
+ */
+
+ /*
+ * Graphics Display Controller
+ */
+ regp->Graphics[0] = 0x00;
+ regp->Graphics[1] = 0x00;
+ regp->Graphics[2] = 0x00;
+ regp->Graphics[3] = 0x00;
+ if (depth == 1) {
+ regp->Graphics[4] = BIT_PLANE;
+ regp->Graphics[5] = 0x00;
+ } else {
+ regp->Graphics[4] = 0x00;
+ if (depth == 4)
+ regp->Graphics[5] = 0x02;
+ else
+ regp->Graphics[5] = 0x40;
+ }
+ regp->Graphics[6] = 0x05; /* only map 64k VGA memory !!!! */
+ regp->Graphics[7] = 0x0F;
+ regp->Graphics[8] = 0xFF;
+
+ if (depth == 1) {
+ /* Initialise the Mono map according to which bit-plane gets used */
+
+ Bool flipPixels = xf86GetFlipPixels();
+
+ for (i=0; i<16; i++)
+ if (((i & (1 << BIT_PLANE)) != 0) != flipPixels)
+ regp->Attribute[i] = WHITE_VALUE;
+ else
+ regp->Attribute[i] = BLACK_VALUE;
+
+ regp->Attribute[16] = 0x01; /* -VGA2- */ /* wrong for the ET4000 */
+ if (!hwp->ShowOverscan)
+ regp->Attribute[OVERSCAN] = OVERSCAN_VALUE; /* -VGA2- */
+ } else {
+ regp->Attribute[0] = 0x00; /* standard colormap translation */
+ regp->Attribute[1] = 0x01;
+ regp->Attribute[2] = 0x02;
+ regp->Attribute[3] = 0x03;
+ regp->Attribute[4] = 0x04;
+ regp->Attribute[5] = 0x05;
+ regp->Attribute[6] = 0x06;
+ regp->Attribute[7] = 0x07;
+ regp->Attribute[8] = 0x08;
+ regp->Attribute[9] = 0x09;
+ regp->Attribute[10] = 0x0A;
+ regp->Attribute[11] = 0x0B;
+ regp->Attribute[12] = 0x0C;
+ regp->Attribute[13] = 0x0D;
+ regp->Attribute[14] = 0x0E;
+ regp->Attribute[15] = 0x0F;
+ if (depth == 4)
+ regp->Attribute[16] = 0x81; /* wrong for the ET4000 */
+ else
+ regp->Attribute[16] = 0x41; /* wrong for the ET4000 */
+ /* Attribute[17] (overscan) initialised in vgaHWGetHWRec() */
+ }
+ regp->Attribute[18] = 0x0F;
+ regp->Attribute[19] = 0x00;
+ regp->Attribute[20] = 0x00;
+
+ return(TRUE);
+}
+
+ /*
+ * OK, so much for theory. Now, let's deal with the >real< world...
+ *
+ * The above CRTC settings are precise in theory, except that many, if not
+ * most, VGA clones fail to reset the blanking signal when the character or
+ * line counter reaches [HV]Total. In this case, the signal is only
+ * unblanked when the counter reaches [HV]BlankEnd (mod 64, 128 or 256 as
+ * the case may be) at the start of the >next< scanline or frame, which
+ * means only part of the screen shows. This affects how null overscans
+ * are to be implemented on such adapters.
+ *
+ * Henceforth, VGA cores that implement this broken, but unfortunately
+ * common, behaviour are to be designated as KGA's, in honour of Koen
+ * Gadeyne, whose zeal to eliminate overscans (read: fury) set in motion
+ * a series of events that led to the discovery of this problem.
+ *
+ * Some VGA's are KGA's only in the horizontal, or only in the vertical,
+ * some in both, others in neither. Don't let anyone tell you there is
+ * such a thing as a VGA "standard"... And, thank the Creator for the fact
+ * that Hilbert spaces are not yet implemented in this industry.
+ *
+ * The following implements a trick suggested by David Dawes. This sets
+ * [HV]BlankEnd to zero if the blanking interval does not already contain a
+ * 0-point, and decrements it by one otherwise. In the latter case, this
+ * will produce a left and/or top overscan which the colourmap code will
+ * (still) need to ensure is as close to black as possible. This will make
+ * the behaviour consistent across all chipsets, while allowing all
+ * chipsets to display the entire screen. Non-KGA drivers can ignore the
+ * following in their own copy of this code.
+ *
+ * -- TSI @ UQV, 1998.08.21
+ */
+
+CARD32
+vgaHWHBlankKGA(DisplayModePtr mode, vgaRegPtr regp, int nBits,
+ unsigned int Flags)
+{
+ int nExtBits = (nBits < 6) ? 0 : nBits - 6;
+ CARD32 ExtBits;
+ CARD32 ExtBitMask = ((1 << nExtBits) - 1) << 6;
+
+ regp->CRTC[3] = (regp->CRTC[3] & ~0x1F)
+ | (((mode->CrtcHBlankEnd >> 3) - 1) & 0x1F);
+ regp->CRTC[5] = (regp->CRTC[5] & ~0x80)
+ | ((((mode->CrtcHBlankEnd >> 3) - 1) & 0x20) << 2);
+ ExtBits = ((mode->CrtcHBlankEnd >> 3) - 1) & ExtBitMask;
+
+ /* First the horizontal case */
+ if ((Flags & KGA_FIX_OVERSCAN)
+ && ((mode->CrtcHBlankEnd >> 3) == (mode->CrtcHTotal >> 3)))
+ {
+ int i = (regp->CRTC[3] & 0x1F)
+ | ((regp->CRTC[5] & 0x80) >> 2)
+ | ExtBits;
+ if (Flags & KGA_ENABLE_ON_ZERO) {
+ if ((i-- > (((mode->CrtcHBlankStart >> 3) - 1)
+ & (0x3F | ExtBitMask)))
+ && (mode->CrtcHBlankEnd == mode->CrtcHTotal))
+ i = 0;
+ } else if (Flags & KGA_BE_TOT_DEC)
+ i--;
+ regp->CRTC[3] = (regp->CRTC[3] & ~0x1F) | (i & 0x1F);
+ regp->CRTC[5] = (regp->CRTC[5] & ~0x80) | ((i << 2) & 0x80);
+ ExtBits = i & ExtBitMask;
+ }
+ return ExtBits >> 6;
+}
+
+ /*
+ * The vertical case is a little trickier. Some VGA's ignore bit 0x80 of
+ * CRTC[22]. Also, in some cases, a zero CRTC[22] will still blank the
+ * very first scanline in a double- or multi-scanned mode. This last case
+ * needs further investigation.
+ */
+CARD32
+vgaHWVBlankKGA(DisplayModePtr mode, vgaRegPtr regp, int nBits,
+ unsigned int Flags)
+{
+ CARD32 ExtBits;
+ CARD32 nExtBits = (nBits < 8) ? 0 : (nBits - 8);
+ CARD32 ExtBitMask = ((1 << nExtBits) - 1) << 8;
+ /* If width is not known nBits should be 0. In this
+ * case BitMask is set to 0 so we can check for it. */
+ CARD32 BitMask = (nBits < 7) ? 0 : ((1 << nExtBits) - 1);
+ int VBlankStart = (mode->CrtcVBlankStart - 1) & 0xFF;
+ regp->CRTC[22] = (mode->CrtcVBlankEnd - 1) & 0xFF;
+ ExtBits = (mode->CrtcVBlankEnd - 1) & ExtBitMask;
+
+ if ((Flags & KGA_FIX_OVERSCAN)
+ && (mode->CrtcVBlankEnd == mode->CrtcVTotal))
+ /* Null top overscan */
+ {
+ int i = regp->CRTC[22] | ExtBits;
+ if (Flags & KGA_ENABLE_ON_ZERO) {
+ if (((BitMask && ((i & BitMask) > (VBlankStart & BitMask)))
+ || ((i > VBlankStart) && /* 8-bit case */
+ ((i & 0x7F) > (VBlankStart & 0x7F)))) && /* 7-bit case */
+ !(regp->CRTC[9] & 0x9F)) /* 1 scanline/row */
+ i = 0;
+ else
+ i = (i - 1);
+ } else if (Flags & KGA_BE_TOT_DEC)
+ i = (i - 1);
+
+ regp->CRTC[22] = i & 0xFF;
+ ExtBits = i & 0xFF00;
+ }
+ return ExtBits >> 8;
+}
+
+/*
+ * these are some more hardware specific helpers, formerly in vga.c
+ */
+static void
+vgaHWGetHWRecPrivate(void)
+{
+ if (vgaHWPrivateIndex < 0)
+ vgaHWPrivateIndex = xf86AllocateScrnInfoPrivateIndex();
+ return;
+}
+
+
+static void
+vgaHWFreeRegs(vgaRegPtr regp)
+{
+ if (regp->CRTC)
+ xfree (regp->CRTC);
+
+ regp->CRTC =
+ regp->Sequencer =
+ regp->Graphics =
+ regp->Attribute = NULL;
+
+ regp->numCRTC =
+ regp->numSequencer =
+ regp->numGraphics =
+ regp->numAttribute = 0;
+}
+
+
+
+static Bool
+vgaHWAllocRegs(vgaRegPtr regp)
+{
+ unsigned char *buf;
+
+ if ((regp->numCRTC + regp->numSequencer + regp->numGraphics +
+ regp->numAttribute) == 0)
+ return FALSE;
+
+ buf = xcalloc(regp->numCRTC +
+ regp->numSequencer +
+ regp->numGraphics +
+ regp->numAttribute, 1);
+ if (!buf)
+ return FALSE;
+
+ regp->CRTC = buf;
+ regp->Sequencer = regp->CRTC + regp->numCRTC;
+ regp->Graphics = regp->Sequencer + regp->numSequencer;
+ regp->Attribute = regp->Graphics + regp->numGraphics;
+
+ return TRUE;
+}
+
+
+Bool
+vgaHWAllocDefaultRegs(vgaRegPtr regp)
+{
+ regp->numCRTC = VGA_NUM_CRTC;
+ regp->numSequencer = VGA_NUM_SEQ;
+ regp->numGraphics = VGA_NUM_GFX;
+ regp->numAttribute = VGA_NUM_ATTR;
+
+ return vgaHWAllocRegs(regp);
+}
+
+
+Bool
+vgaHWSetRegCounts(ScrnInfoPtr scrp, int numCRTC, int numSequencer,
+ int numGraphics, int numAttribute)
+{
+#define VGAHWMINNUM(regtype) \
+ ((newMode.num##regtype < regp->num##regtype) ? \
+ (newMode.num##regtype) : (regp->num##regtype))
+#define VGAHWCOPYREGSET(regtype) \
+ memcpy (newMode.regtype, regp->regtype, VGAHWMINNUM(regtype))
+
+ vgaRegRec newMode, newSaved;
+ vgaRegPtr regp;
+
+ regp = &VGAHWPTR(scrp)->ModeReg;
+ memcpy (&newMode, regp, sizeof(vgaRegRec));
+
+ /* allocate space for new registers */
+
+ regp = &newMode;
+ regp->numCRTC = numCRTC;
+ regp->numSequencer = numSequencer;
+ regp->numGraphics = numGraphics;
+ regp->numAttribute = numAttribute;
+ if (!vgaHWAllocRegs(regp))
+ return FALSE;
+
+ regp = &VGAHWPTR(scrp)->SavedReg;
+ memcpy (&newSaved, regp, sizeof(vgaRegRec));
+
+ regp = &newSaved;
+ regp->numCRTC = numCRTC;
+ regp->numSequencer = numSequencer;
+ regp->numGraphics = numGraphics;
+ regp->numAttribute = numAttribute;
+ if (!vgaHWAllocRegs(regp)) {
+ vgaHWFreeRegs(&newMode);
+ return FALSE;
+ }
+
+ /* allocations succeeded, copy register data into new space */
+
+ regp = &VGAHWPTR(scrp)->ModeReg;
+ VGAHWCOPYREGSET(CRTC);
+ VGAHWCOPYREGSET(Sequencer);
+ VGAHWCOPYREGSET(Graphics);
+ VGAHWCOPYREGSET(Attribute);
+
+ regp = &VGAHWPTR(scrp)->SavedReg;
+ VGAHWCOPYREGSET(CRTC);
+ VGAHWCOPYREGSET(Sequencer);
+ VGAHWCOPYREGSET(Graphics);
+ VGAHWCOPYREGSET(Attribute);
+
+ /* free old register arrays */
+
+ regp = &VGAHWPTR(scrp)->ModeReg;
+ vgaHWFreeRegs(regp);
+ memcpy(regp, &newMode, sizeof(vgaRegRec));
+
+ regp = &VGAHWPTR(scrp)->SavedReg;
+ vgaHWFreeRegs(regp);
+ memcpy(regp, &newSaved, sizeof(vgaRegRec));
+
+ return TRUE;
+
+#undef VGAHWMINNUM
+#undef VGAHWCOPYREGSET
+}
+
+
+Bool
+vgaHWCopyReg(vgaRegPtr dst, vgaRegPtr src)
+{
+ vgaHWFreeRegs(dst);
+
+ memcpy(dst, src, sizeof(vgaRegRec));
+
+ if (!vgaHWAllocRegs(dst))
+ return FALSE;
+
+ memcpy(dst->CRTC, src->CRTC, src->numCRTC);
+ memcpy(dst->Sequencer, src->Sequencer, src->numSequencer);
+ memcpy(dst->Graphics, src->Graphics, src->numGraphics);
+ memcpy(dst->Attribute, src->Attribute, src->numAttribute);
+
+ return TRUE;
+}
+
+
+Bool
+vgaHWGetHWRec(ScrnInfoPtr scrp)
+{
+ vgaRegPtr regp;
+ vgaHWPtr hwp;
+ int i;
+
+ /*
+ * Let's make sure that the private exists and allocate one.
+ */
+ vgaHWGetHWRecPrivate();
+ /*
+ * New privates are always set to NULL, so we can check if the allocation
+ * has already been done.
+ */
+ if (VGAHWPTR(scrp))
+ return TRUE;
+ hwp = VGAHWPTRLVAL(scrp) = xnfcalloc(sizeof(vgaHWRec), 1);
+ regp = &VGAHWPTR(scrp)->ModeReg;
+
+ if ((!vgaHWAllocDefaultRegs(&VGAHWPTR(scrp)->SavedReg)) ||
+ (!vgaHWAllocDefaultRegs(&VGAHWPTR(scrp)->ModeReg))) {
+ xfree(hwp);
+ return FALSE;
+ }
+
+ if (scrp->bitsPerPixel == 1) {
+ rgb blackColour = scrp->display->blackColour,
+ whiteColour = scrp->display->whiteColour;
+
+ if (blackColour.red > 0x3F) blackColour.red = 0x3F;
+ if (blackColour.green > 0x3F) blackColour.green = 0x3F;
+ if (blackColour.blue > 0x3F) blackColour.blue = 0x3F;
+
+ if (whiteColour.red > 0x3F) whiteColour.red = 0x3F;
+ if (whiteColour.green > 0x3F) whiteColour.green = 0x3F;
+ if (whiteColour.blue > 0x3F) whiteColour.blue = 0x3F;
+
+ if ((blackColour.red == whiteColour.red ) &&
+ (blackColour.green == whiteColour.green) &&
+ (blackColour.blue == whiteColour.blue )) {
+ blackColour.red ^= 0x3F;
+ blackColour.green ^= 0x3F;
+ blackColour.blue ^= 0x3F;
+ }
+
+ /*
+ * initialize default colormap for monochrome
+ */
+ for (i=0; i<3; i++) regp->DAC[i] = 0x00;
+ for (i=3; i<768; i++) regp->DAC[i] = 0x3F;
+ i = BLACK_VALUE * 3;
+ regp->DAC[i++] = blackColour.red;
+ regp->DAC[i++] = blackColour.green;
+ regp->DAC[i] = blackColour.blue;
+ i = WHITE_VALUE * 3;
+ regp->DAC[i++] = whiteColour.red;
+ regp->DAC[i++] = whiteColour.green;
+ regp->DAC[i] = whiteColour.blue;
+ i = OVERSCAN_VALUE * 3;
+ regp->DAC[i++] = 0x00;
+ regp->DAC[i++] = 0x00;
+ regp->DAC[i] = 0x00;
+ } else {
+ /* Set all colours to black */
+ for (i=0; i<768; i++) regp->DAC[i] = 0x00;
+ /* ... and the overscan */
+ if (scrp->depth >= 4)
+ regp->Attribute[OVERSCAN] = 0xFF;
+ }
+ if (xf86FindOption(scrp->confScreen->options, "ShowOverscan")) {
+ xf86MarkOptionUsedByName(scrp->confScreen->options, "ShowOverscan");
+ xf86DrvMsg(scrp->scrnIndex, X_CONFIG, "Showing overscan area\n");
+ regp->DAC[765] = 0x3F;
+ regp->DAC[766] = 0x00;
+ regp->DAC[767] = 0x3F;
+ regp->Attribute[OVERSCAN] = 0xFF;
+ hwp->ShowOverscan = TRUE;
+ } else
+ hwp->ShowOverscan = FALSE;
+
+ hwp->paletteEnabled = FALSE;
+ hwp->cmapSaved = FALSE;
+ hwp->MapSize = 0;
+ hwp->pScrn = scrp;
+
+ /* Initialise the function pointers with the standard VGA versions */
+ vgaHWSetStdFuncs(hwp);
+
+ hwp->PIOOffset = scrp->domainIOBase;
+ hwp->dev = xf86GetPciInfoForEntity(scrp->entityList[0]);
+
+ return TRUE;
+}
+
+
+void
+vgaHWFreeHWRec(ScrnInfoPtr scrp)
+{
+ if (vgaHWPrivateIndex >= 0) {
+ vgaHWPtr hwp = VGAHWPTR(scrp);
+
+ if (!hwp)
+ return;
+
+ xfree(hwp->FontInfo1);
+ xfree(hwp->FontInfo2);
+ xfree(hwp->TextInfo);
+
+ vgaHWFreeRegs (&hwp->ModeReg);
+ vgaHWFreeRegs (&hwp->SavedReg);
+
+ xfree(hwp);
+ VGAHWPTRLVAL(scrp) = NULL;
+ }
+}
+
+
+Bool
+vgaHWMapMem(ScrnInfoPtr scrp)
+{
+ vgaHWPtr hwp = VGAHWPTR(scrp);
+ int scr_index = scrp->scrnIndex;
+
+ if (hwp->Base)
+ return TRUE;
+
+ /* If not set, initialise with the defaults */
+ if (hwp->MapSize == 0)
+ hwp->MapSize = VGA_DEFAULT_MEM_SIZE;
+ if (hwp->MapPhys == 0)
+ hwp->MapPhys = VGA_DEFAULT_PHYS_ADDR;
+
+ /*
+ * Map as VIDMEM_MMIO_32BIT because WC
+ * is bad when there is page flipping.
+ * XXX This is not correct but we do it
+ * for now.
+ */
+#ifdef DEBUG
+ ErrorF("Mapping VGAMem\n");
+#endif
+ hwp->Base = xf86MapDomainMemory(scr_index, VIDMEM_MMIO_32BIT, hwp->dev,
+ hwp->MapPhys, hwp->MapSize);
+ return hwp->Base != NULL;
+}
+
+
+void
+vgaHWUnmapMem(ScrnInfoPtr scrp)
+{
+ vgaHWPtr hwp = VGAHWPTR(scrp);
+ int scr_index = scrp->scrnIndex;
+
+ if (hwp->Base == NULL)
+ return;
+
+#ifdef DEBUG
+ ErrorF("Unmapping VGAMem\n");
+#endif
+ xf86UnMapVidMem(scr_index, hwp->Base, hwp->MapSize);
+ hwp->Base = NULL;
+}
+
+int
+vgaHWGetIndex()
+{
+ return vgaHWPrivateIndex;
+}
+
+
+void
+vgaHWGetIOBase(vgaHWPtr hwp)
+{
+ hwp->IOBase = (hwp->readMiscOut(hwp) & 0x01) ?
+ VGA_IOBASE_COLOR : VGA_IOBASE_MONO;
+ xf86DrvMsgVerb(hwp->pScrn->scrnIndex, X_INFO, 3,
+ "vgaHWGetIOBase: hwp->IOBase is 0x%04x, hwp->PIOOffset is 0x%04lx\n",
+ hwp->IOBase, hwp->PIOOffset);
+}
+
+
+void
+vgaHWLock(vgaHWPtr hwp)
+{
+ /* Protect CRTC[0-7] */
+ hwp->writeCrtc(hwp, 0x11, hwp->readCrtc(hwp, 0x11) | 0x80);
+}
+
+void
+vgaHWUnlock(vgaHWPtr hwp)
+{
+ /* Unprotect CRTC[0-7] */
+ hwp->writeCrtc(hwp, 0x11, hwp->readCrtc(hwp, 0x11) & ~0x80);
+}
+
+
+void
+vgaHWEnable(vgaHWPtr hwp)
+{
+ hwp->writeEnable(hwp, hwp->readEnable(hwp) | 0x01);
+}
+
+
+void
+vgaHWDisable(vgaHWPtr hwp)
+{
+ hwp->writeEnable(hwp, hwp->readEnable(hwp) & ~0x01);
+}
+
+
+static void
+vgaHWLoadPalette(ScrnInfoPtr pScrn, int numColors, int *indices, LOCO *colors,
+ VisualPtr pVisual)
+{
+ vgaHWPtr hwp = VGAHWPTR(pScrn);
+ int i, index;
+
+ for (i = 0; i < numColors; i++) {
+ index = indices[i];
+ hwp->writeDacWriteAddr(hwp, index);
+ DACDelay(hwp);
+ hwp->writeDacData(hwp, colors[index].red);
+ DACDelay(hwp);
+ hwp->writeDacData(hwp, colors[index].green);
+ DACDelay(hwp);
+ hwp->writeDacData(hwp, colors[index].blue);
+ DACDelay(hwp);
+ }
+
+ /* This shouldn't be necessary, but we'll play safe. */
+ hwp->disablePalette(hwp);
+}
+
+
+static void
+vgaHWSetOverscan(ScrnInfoPtr pScrn, int overscan)
+{
+ vgaHWPtr hwp = VGAHWPTR(pScrn);
+
+ if (overscan < 0 || overscan > 255)
+ return;
+
+ hwp->enablePalette(hwp);
+ hwp->writeAttr(hwp, OVERSCAN, overscan);
+
+#ifdef DEBUGOVERSCAN
+ {
+ int ov = hwp->readAttr(hwp, OVERSCAN);
+ int red, green, blue;
+
+ hwp->writeDacReadAddr(hwp, ov);
+ red = hwp->readDacData(hwp);
+ green = hwp->readDacData(hwp);
+ blue = hwp->readDacData(hwp);
+ ErrorF("Overscan index is 0x%02x, colours are #%02x%02x%02x\n",
+ ov, red, green, blue);
+ }
+#endif
+
+ hwp->disablePalette(hwp);
+}
+
+
+Bool
+vgaHWHandleColormaps(ScreenPtr pScreen)
+{
+ ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+
+ if (pScrn->depth > 1 && pScrn->depth <= 8) {
+ return xf86HandleColormaps(pScreen, 1 << pScrn->depth,
+ pScrn->rgbBits, vgaHWLoadPalette,
+ pScrn->depth > 4 ? vgaHWSetOverscan : NULL,
+ CMAP_RELOAD_ON_MODE_SWITCH);
+ }
+ return TRUE;
+}
+
+/* ----------------------- DDC support ------------------------*/
+/*
+ * Adjust v_active, v_blank, v_sync, v_sync_end, v_blank_end, v_total
+ * to read out EDID at a faster rate. Allowed maximum is 25kHz with
+ * 20 usec v_sync active. Set positive v_sync polarity, turn off lightpen
+ * readback, enable access to cr00-cr07.
+ */
+
+/* vertical timings */
+#define DISPLAY_END 0x04
+#define BLANK_START DISPLAY_END
+#define SYNC_START BLANK_START
+#define SYNC_END 0x09
+#define BLANK_END SYNC_END
+#define V_TOTAL BLANK_END
+/* this function doesn't have to be reentrant for our purposes */
+struct _vgaDdcSave {
+ unsigned char cr03;
+ unsigned char cr06;
+ unsigned char cr07;
+ unsigned char cr09;
+ unsigned char cr10;
+ unsigned char cr11;
+ unsigned char cr12;
+ unsigned char cr15;
+ unsigned char cr16;
+ unsigned char msr;
+};
+
+void
+vgaHWddc1SetSpeed(ScrnInfoPtr pScrn, xf86ddcSpeed speed)
+{
+ vgaHWPtr hwp = VGAHWPTR(pScrn);
+ unsigned char tmp;
+ struct _vgaDdcSave* save;
+ switch (speed) {
+ case DDC_FAST:
+
+ if (hwp->ddc != NULL) break;
+ hwp->ddc = xnfcalloc(sizeof(struct _vgaDdcSave),1);
+ save = (struct _vgaDdcSave *)hwp->ddc;
+ /* Lightpen register disable - allow access to cr10 & 11; just in case */
+ save->cr03 = hwp->readCrtc(hwp, 0x03);
+ hwp->writeCrtc(hwp,0x03,(save->cr03 |0x80));
+ save->cr12 = hwp->readCrtc(hwp, 0x12);
+ hwp->writeCrtc(hwp,0x12,DISPLAY_END);
+ save->cr15 = hwp->readCrtc(hwp, 0x15);
+ hwp->writeCrtc(hwp,0x15,BLANK_START);
+ save->cr10 = hwp->readCrtc(hwp, 0x10);
+ hwp->writeCrtc(hwp,0x10,SYNC_START);
+ save->cr11 = hwp->readCrtc(hwp, 0x11);
+ /* unprotect group 1 registers; just in case ...*/
+ hwp->writeCrtc(hwp,0x11,((save->cr11 & 0x70) | SYNC_END));
+ save->cr16 = hwp->readCrtc(hwp, 0x16);
+ hwp->writeCrtc(hwp,0x16,BLANK_END);
+ save->cr06 = hwp->readCrtc(hwp, 0x06);
+ hwp->writeCrtc(hwp,0x06,V_TOTAL);
+ /* all values have less than 8 bit - mask out 9th and 10th bits */
+ save->cr09 = hwp->readCrtc(hwp, 0x09);
+ hwp->writeCrtc(hwp,0x09,(save->cr09 &0xDF));
+ save->cr07 = hwp->readCrtc(hwp, 0x07);
+ hwp->writeCrtc(hwp,0x07,(save->cr07 &0x10));
+ /* vsync polarity negativ & ensure a 25MHz clock */
+ save->msr = hwp->readMiscOut(hwp);
+ hwp->writeMiscOut(hwp,((save->msr & 0xF3) | 0x80));
+ break;
+ case DDC_SLOW:
+ if (hwp->ddc == NULL) break;
+ save = (struct _vgaDdcSave *)hwp->ddc;
+ hwp->writeMiscOut(hwp,save->msr);
+ hwp->writeCrtc(hwp,0x07,save->cr07);
+ tmp = hwp->readCrtc(hwp, 0x09);
+ hwp->writeCrtc(hwp,0x09,((save->cr09 & 0x20) | (tmp & 0xDF)));
+ hwp->writeCrtc(hwp,0x06,save->cr06);
+ hwp->writeCrtc(hwp,0x16,save->cr16);
+ hwp->writeCrtc(hwp,0x11,save->cr11);
+ hwp->writeCrtc(hwp,0x10,save->cr10);
+ hwp->writeCrtc(hwp,0x15,save->cr15);
+ hwp->writeCrtc(hwp,0x12,save->cr12);
+ hwp->writeCrtc(hwp,0x03,save->cr03);
+ xfree(save);
+ hwp->ddc = NULL;
+ break;
+ default:
+ break;
+ }
+}
+
+DDC1SetSpeedProc vgaHWddc1SetSpeedWeak(void) { return vgaHWddc1SetSpeed; }
+
+SaveScreenProcPtr vgaHWSaveScreenWeak(void) { return vgaHWSaveScreen; }
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-11 20:29:10 +0000