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xserver/hw/xfree86/vgahw/vgaHW.c

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/*
*
* 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)
{
pci_io_write8(hwp->io, hwp->IOBase + VGA_CRTC_INDEX_OFFSET, index);
pci_io_write8(hwp->io, hwp->IOBase + VGA_CRTC_DATA_OFFSET, value);
}
static CARD8
stdReadCrtc(vgaHWPtr hwp, CARD8 index)
{
pci_io_write8(hwp->io, hwp->IOBase + VGA_CRTC_INDEX_OFFSET, index);
return pci_io_read8(hwp->io, hwp->IOBase + VGA_CRTC_DATA_OFFSET);
}
static void
stdWriteGr(vgaHWPtr hwp, CARD8 index, CARD8 value)
{
pci_io_write8(hwp->io, VGA_GRAPH_INDEX, index);
pci_io_write8(hwp->io, VGA_GRAPH_DATA, value);
}
static CARD8
stdReadGr(vgaHWPtr hwp, CARD8 index)
{
pci_io_write8(hwp->io, VGA_GRAPH_INDEX, index);
return pci_io_read8(hwp->io, VGA_GRAPH_DATA);
}
static void
stdWriteSeq(vgaHWPtr hwp, CARD8 index, CARD8 value)
{
pci_io_write8(hwp->io, VGA_SEQ_INDEX, index);
pci_io_write8(hwp->io, VGA_SEQ_DATA, value);
}
static CARD8
stdReadSeq(vgaHWPtr hwp, CARD8 index)
{
pci_io_write8(hwp->io, VGA_SEQ_INDEX, index);
return pci_io_read8(hwp->io, VGA_SEQ_DATA);
}
static CARD8
stdReadST00(vgaHWPtr hwp)
{
return pci_io_read8(hwp->io, VGA_IN_STAT_0);
}
static CARD8
stdReadST01(vgaHWPtr hwp)
{
return pci_io_read8(hwp->io, hwp->IOBase + VGA_IN_STAT_1_OFFSET);
}
static CARD8
stdReadFCR(vgaHWPtr hwp)
{
return pci_io_read8(hwp->io, VGA_FEATURE_R);
}
static void
stdWriteFCR(vgaHWPtr hwp, CARD8 value)
{
pci_io_write8(hwp->io, hwp->IOBase + VGA_FEATURE_W_OFFSET,value);
}
static void
stdWriteAttr(vgaHWPtr hwp, CARD8 index, CARD8 value)
{
if (hwp->paletteEnabled)
index &= ~0x20;
else
index |= 0x20;
(void) pci_io_read8(hwp->io, hwp->IOBase + VGA_IN_STAT_1_OFFSET);
pci_io_write8(hwp->io, VGA_ATTR_INDEX, index);
pci_io_write8(hwp->io, VGA_ATTR_DATA_W, value);
}
static CARD8
stdReadAttr(vgaHWPtr hwp, CARD8 index)
{
if (hwp->paletteEnabled)
index &= ~0x20;
else
index |= 0x20;
(void) pci_io_read8(hwp->io, hwp->IOBase + VGA_IN_STAT_1_OFFSET);
pci_io_write8(hwp->io, VGA_ATTR_INDEX, index);
return pci_io_read8(hwp->io, VGA_ATTR_DATA_R);
}
static void
stdWriteMiscOut(vgaHWPtr hwp, CARD8 value)
{
pci_io_write8(hwp->io, VGA_MISC_OUT_W, value);
}
static CARD8
stdReadMiscOut(vgaHWPtr hwp)
{
return pci_io_read8(hwp->io, VGA_MISC_OUT_R);
}
static void
stdEnablePalette(vgaHWPtr hwp)
{
(void) pci_io_read8(hwp->io, hwp->IOBase + VGA_IN_STAT_1_OFFSET);
pci_io_write8(hwp->io, VGA_ATTR_INDEX, 0x00);
hwp->paletteEnabled = TRUE;
}
static void
stdDisablePalette(vgaHWPtr hwp)
{
(void) pci_io_read8(hwp->io, hwp->IOBase + VGA_IN_STAT_1_OFFSET);
pci_io_write8(hwp->io, VGA_ATTR_INDEX, 0x20);
hwp->paletteEnabled = FALSE;
}
static void
stdWriteDacMask(vgaHWPtr hwp, CARD8 value)
{
pci_io_write8(hwp->io, VGA_DAC_MASK, value);
}
static CARD8
stdReadDacMask(vgaHWPtr hwp)
{
return pci_io_read8(hwp->io, VGA_DAC_MASK);
}
static void
stdWriteDacReadAddr(vgaHWPtr hwp, CARD8 value)
{
pci_io_write8(hwp->io, VGA_DAC_READ_ADDR, value);
}
static void
stdWriteDacWriteAddr(vgaHWPtr hwp, CARD8 value)
{
pci_io_write8(hwp->io, VGA_DAC_WRITE_ADDR, value);
}
static void
stdWriteDacData(vgaHWPtr hwp, CARD8 value)
{
pci_io_write8(hwp->io, VGA_DAC_DATA, value);
}
static CARD8
stdReadDacData(vgaHWPtr hwp)
{
return pci_io_read8(hwp->io, VGA_DAC_DATA);
}
static CARD8
stdReadEnable(vgaHWPtr hwp)
{
return pci_io_read8(hwp->io, VGA_ENABLE);
}
static void
stdWriteEnable(vgaHWPtr hwp, CARD8 value)
{
pci_io_write8(hwp->io, 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->readEnable = stdReadEnable;
hwp->writeEnable = stdWriteEnable;
hwp->io = pci_legacy_open_io(hwp->dev, 0, 64 * 1024);
}
/*
* 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 = malloc(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 = malloc(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 = malloc(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);
DebugF("CRTC[0x%02x] = 0x%02x\n", i, save->CRTC[i]);
}
hwp->enablePalette(hwp);
for (i = 0; i < save->numAttribute; i++) {
save->Attribute[i] = hwp->readAttr(hwp, i);
DebugF("Attribute[0x%02x] = 0x%02x\n", i, save->Attribute[i]);
}
hwp->disablePalette(hwp);
for (i = 0; i < save->numGraphics; i++) {
save->Graphics[i] = hwp->readGr(hwp, i);
DebugF("Graphics[0x%02x] = 0x%02x\n", i, save->Graphics[i]);
}
for (i = 1; i < save->numSequencer; i++) {
save->Sequencer[i] = hwp->readSeq(hwp, i);
DebugF("Sequencer[0x%02x] = 0x%02x\n", i, save->Sequencer[i]);
}
}
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);
switch (i % 3) {
case 0:
DebugF("DAC[0x%02x] = 0x%02x, ", i / 3, save->DAC[i]);
break;
case 1:
DebugF("0x%02x, ", save->DAC[i]);
break;
case 2:
DebugF("0x%02x\n", save->DAC[i]);
}
}
/*
* 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);
switch (i % 3) {
case 0:
DebugF("DAC[0x%02x] = 0x%02x, ", i / 3, save->DAC[i]);
break;
case 1:
DebugF("0x%02x, ", save->DAC[i]);
break;
case 2:
DebugF("0x%02x\n", save->DAC[i]);
}
}
}
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)
{
free(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 = calloc(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))) {
free(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;
hwp->dev = xf86GetPciInfoForEntity(scrp->entityList[0]);
return TRUE;
}
void
vgaHWFreeHWRec(ScrnInfoPtr scrp)
{
if (vgaHWPrivateIndex >= 0) {
vgaHWPtr hwp = VGAHWPTR(scrp);
if (!hwp)
return;
pci_device_close_io(hwp->dev, hwp->io);
free(hwp->FontInfo1);
free(hwp->FontInfo2);
free(hwp->TextInfo);
vgaHWFreeRegs (&hwp->ModeReg);
vgaHWFreeRegs (&hwp->SavedReg);
free(hwp);
VGAHWPTRLVAL(scrp) = NULL;
}
}
Bool
vgaHWMapMem(ScrnInfoPtr scrp)
{
vgaHWPtr hwp = VGAHWPTR(scrp);
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.
*/
DebugF("Mapping VGAMem\n");
pci_device_map_legacy(hwp->dev, hwp->MapPhys, hwp->MapSize, PCI_DEV_MAP_FLAG_WRITABLE, &hwp->Base);
return hwp->Base != NULL;
}
void
vgaHWUnmapMem(ScrnInfoPtr scrp)
{
vgaHWPtr hwp = VGAHWPTR(scrp);
if (hwp->Base == NULL)
return;
DebugF("Unmapping VGAMem\n");
pci_device_unmap_legacy(hwp->dev, hwp->Base, hwp->MapSize);
hwp->Base = NULL;
}
int
vgaHWGetIndex(void)
{
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\n", hwp->IOBase);
}
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);
free(save);
hwp->ddc = NULL;
break;
default:
break;
}
}
DDC1SetSpeedProc
vgaHWddc1SetSpeedWeak(void)
{
return vgaHWddc1SetSpeed;
}
SaveScreenProcPtr vgaHWSaveScreenWeak(void)
{
return vgaHWSaveScreen;
}
/*
* xf86GetClocks -- get the dot-clocks via a BIG BAD hack ...
*/
void
xf86GetClocks(ScrnInfoPtr pScrn, int num, Bool (*ClockFunc)(ScrnInfoPtr, int),
void (*ProtectRegs)(ScrnInfoPtr, Bool),
void (*BlankScreen)(ScrnInfoPtr, Bool), unsigned long vertsyncreg,
int maskval, int knownclkindex, int knownclkvalue)
{
register int status = vertsyncreg;
unsigned long i, cnt, rcnt, sync;
vgaHWPtr hwp = VGAHWPTR(pScrn);
/* First save registers that get written on */
(*ClockFunc)(pScrn, CLK_REG_SAVE);
if (num > MAXCLOCKS)
num = MAXCLOCKS;
for (i = 0; i < num; i++)
{
if (ProtectRegs)
(*ProtectRegs)(pScrn, TRUE);
if (!(*ClockFunc)(pScrn, i))
{
pScrn->clock[i] = -1;
continue;
}
if (ProtectRegs)
(*ProtectRegs)(pScrn, FALSE);
if (BlankScreen)
(*BlankScreen)(pScrn, FALSE);
usleep(50000); /* let VCO stabilise */
cnt = 0;
sync = 200000;
while ((pci_io_read8(hwp->io, status) & maskval) == 0x00)
if (sync-- == 0) goto finish;
/* Something appears to be happening, so reset sync count */
sync = 200000;
while ((pci_io_read8(hwp->io, status) & maskval) == maskval)
if (sync-- == 0) goto finish;
/* Something appears to be happening, so reset sync count */
sync = 200000;
while ((pci_io_read8(hwp->io, status) & maskval) == 0x00)
if (sync-- == 0) goto finish;
for (rcnt = 0; rcnt < 5; rcnt++)
{
while (!(pci_io_read8(hwp->io, status) & maskval))
cnt++;
while ((pci_io_read8(hwp->io, status) & maskval))
cnt++;
}
finish:
pScrn->clock[i] = cnt ? cnt : -1;
if (BlankScreen)
(*BlankScreen)(pScrn, TRUE);
}
for (i = 0; i < num; i++)
{
if (i != knownclkindex)
{
if (pScrn->clock[i] == -1)
{
pScrn->clock[i] = 0;
}
else
{
pScrn->clock[i] = (int)(0.5 +
(((float)knownclkvalue) * pScrn->clock[knownclkindex]) /
(pScrn->clock[i]));
/* Round to nearest 10KHz */
pScrn->clock[i] += 5;
pScrn->clock[i] /= 10;
pScrn->clock[i] *= 10;
}
}
}
pScrn->clock[knownclkindex] = knownclkvalue;
pScrn->numClocks = num;
/* Restore registers that were written on */
(*ClockFunc)(pScrn, CLK_REG_RESTORE);
}
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