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windows-nt/Source/XPSP1/NT/drivers/video/ms/wd/mini/modeset.c

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/*++
Copyright (c) 1992-1996 Microsoft Corporation
Module Name:
modeset.c
Abstract:
This is the modeset code for the WD VGA miniport driver.
Environment:
kernel mode only
Notes:
Revision History:
--*/
#include "dderror.h"
#include "devioctl.h"
#include "miniport.h"
#include "ntddvdeo.h"
#include "video.h"
#include "wdvga.h"
#include "cmdcnst.h"
#include "pvgaequ.h"
VP_STATUS
VgaInterpretCmdStream(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PUSHORT pusCmdStream
);
VP_STATUS
VgaSetMode(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_MODE Mode,
ULONG ModeSize
);
VP_STATUS
VgaQueryAvailableModes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_MODE_INFORMATION ModeInformation,
ULONG ModeInformationSize,
PULONG OutputSize
);
VP_STATUS
VgaQueryNumberOfAvailableModes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_NUM_MODES NumModes,
ULONG NumModesSize,
PULONG OutputSize
);
VP_STATUS
VgaQueryCurrentMode(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_MODE_INFORMATION ModeInformation,
ULONG ModeInformationSize,
PULONG OutputSize
);
VOID
VgaZeroVideoMemory(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
VOID
VgaValidateModes(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
VP_STATUS
VgaSetActiveDisplay(
PHW_DEVICE_EXTENSION HwDeviceExtension,
ULONG ActiveDisplay
);
//
// Private functions
//
VOID
DisableLCD(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
VOID
EnableLCD(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
VOID
DisableCRT(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
VOID
EnableCRT(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
VOID
UnlockAll(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
#if defined(ALLOC_PRAGMA)
#pragma alloc_text(PAGE,VgaSetMode)
#pragma alloc_text(PAGE,VgaQueryAvailableModes)
#pragma alloc_text(PAGE,VgaQueryNumberOfAvailableModes)
#pragma alloc_text(PAGE,VgaQueryCurrentMode)
#pragma alloc_text(PAGE,VgaZeroVideoMemory)
#pragma alloc_text(PAGE,VgaValidateModes)
//
// This routine is NOT pagable because it is called a high IRQL
//
//#pragma alloc_text(PAGE,ExternalMonitorPresent)
//
// This routine is NOT pagable because it is called during WdResetHw,
// which can be called when paging is disabled.
//
//#pragma alloc_text(PAGE,VgaInterpretCmdStream)
#endif
VP_STATUS
VgaInterpretCmdStream(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PUSHORT pusCmdStream
)
/*++
Routine Description:
Interprets the appropriate command array to set up VGA registers for the
requested mode. Typically used to set the VGA into a particular mode by
programming all of the registers
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
pusCmdStream - array of commands to be interpreted.
Return Value:
The status of the operation (can only fail on a bad command); TRUE for
success, FALSE for failure.
--*/
{
ULONG ulCmd;
ULONG ulPort;
UCHAR jValue;
USHORT usValue;
ULONG culCount;
ULONG ulIndex;
ULONG ulBase;
if (pusCmdStream == NULL) {
VideoDebugPrint((1, "VgaInterpretCmdStream - Invalid pusCmdStream\n"));
return TRUE;
}
ulBase = (ULONG)HwDeviceExtension->IOAddress;
//
// Now set the adapter to the desired mode.
//
while ((ulCmd = *pusCmdStream++) != EOD) {
//
// Determine major command type
//
switch (ulCmd & 0xF0) {
//
// Basic input/output command
//
case INOUT:
//
// Determine type of inout instruction
//
if (!(ulCmd & IO)) {
//
// Out instruction. Single or multiple outs?
//
if (!(ulCmd & MULTI)) {
//
// Single out. Byte or word out?
//
if (!(ulCmd & BW)) {
//
// Single byte out
//
ulPort = *pusCmdStream++;
jValue = (UCHAR) *pusCmdStream++;
VideoPortWritePortUchar((PUCHAR)(ulBase+ulPort),
jValue);
} else {
//
// Single word out
//
ulPort = *pusCmdStream++;
usValue = *pusCmdStream++;
VideoPortWritePortUshort((PUSHORT)(ulBase+ulPort),
usValue);
}
} else {
//
// Output a string of values
// Byte or word outs?
//
if (!(ulCmd & BW)) {
//
// String byte outs. Do in a loop; can't use
// VideoPortWritePortBufferUchar because the data
// is in USHORT form
//
ulPort = ulBase + *pusCmdStream++;
culCount = *pusCmdStream++;
while (culCount--) {
jValue = (UCHAR) *pusCmdStream++;
VideoPortWritePortUchar((PUCHAR)ulPort,
jValue);
}
} else {
//
// String word outs
//
ulPort = *pusCmdStream++;
culCount = *pusCmdStream++;
VideoPortWritePortBufferUshort((PUSHORT)
(ulBase + ulPort), pusCmdStream, culCount);
pusCmdStream += culCount;
}
}
} else {
// In instruction
//
// Currently, string in instructions aren't supported; all
// in instructions are handled as single-byte ins
//
// Byte or word in?
//
if (!(ulCmd & BW)) {
//
// Single byte in
//
ulPort = *pusCmdStream++;
jValue = VideoPortReadPortUchar((PUCHAR)ulBase+ulPort);
} else {
//
// Single word in
//
ulPort = *pusCmdStream++;
usValue = VideoPortReadPortUshort((PUSHORT)
(ulBase+ulPort));
}
}
break;
//
// Higher-level input/output commands
//
case METAOUT:
//
// Determine type of metaout command, based on minor
// command field
//
switch (ulCmd & 0x0F) {
//
// Indexed outs
//
case INDXOUT:
ulPort = ulBase + *pusCmdStream++;
culCount = *pusCmdStream++;
ulIndex = *pusCmdStream++;
while (culCount--) {
usValue = (USHORT) (ulIndex +
(((ULONG)(*pusCmdStream++)) << 8));
VideoPortWritePortUshort((PUSHORT)ulPort, usValue);
ulIndex++;
}
break;
//
// Masked out (read, AND, XOR, write)
//
case MASKOUT:
ulPort = *pusCmdStream++;
jValue = VideoPortReadPortUchar((PUCHAR)ulBase+ulPort);
jValue &= *pusCmdStream++;
jValue ^= *pusCmdStream++;
VideoPortWritePortUchar((PUCHAR)ulBase + ulPort,
jValue);
break;
//
// Attribute Controller out
//
case ATCOUT:
ulPort = ulBase + *pusCmdStream++;
culCount = *pusCmdStream++;
ulIndex = *pusCmdStream++;
while (culCount--) {
// Write Attribute Controller index
VideoPortWritePortUchar((PUCHAR)ulPort,
(UCHAR)ulIndex);
// Write Attribute Controller data
jValue = (UCHAR) *pusCmdStream++;
VideoPortWritePortUchar((PUCHAR)ulPort, jValue);
ulIndex++;
}
break;
//
// None of the above; error
//
default:
return FALSE;
}
break;
//
// NOP
//
case NCMD:
break;
//
// Unknown command; error
//
default:
return FALSE;
}
}
return TRUE;
} // end VgaInterpretCmdStream()
VP_STATUS
VgaSetMode(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_MODE Mode,
ULONG ModeSize
)
/*++
Routine Description:
This routine sets the VGA into the requested mode.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
Mode - Pointer to the structure containing the information about the
font to be set.
ModeSize - Length of the input buffer supplied by the user.
Return Value:
ERROR_INSUFFICIENT_BUFFER if the input buffer was not large enough
for the input data.
ERROR_INVALID_PARAMETER if the mode number is invalid.
NO_ERROR if the operation completed successfully.
--*/
{
PVIDEOMODE pRequestedMode;
VP_STATUS status;
UCHAR temp;
UCHAR dummy;
UCHAR bIsColor;
VIDEO_X86_BIOS_ARGUMENTS biosArguments;
UCHAR frequencySetting;
PUCHAR CrtAddressPort, CrtDataPort;
UCHAR bModeFirst = 1;
BOOLEAN bMonitorPresent;
//
// Check if the size of the data in the input buffer is large enough.
//
if (ModeSize < sizeof(VIDEO_MODE)) {
VideoDebugPrint((1, "VgaSetMode: ERROR_INSUFFICIENT_BUFFER\n"));
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Extract the clear memory bit.
//
if (Mode->RequestedMode & VIDEO_MODE_NO_ZERO_MEMORY) {
Mode->RequestedMode &= ~VIDEO_MODE_NO_ZERO_MEMORY;
} else {
VgaZeroVideoMemory(HwDeviceExtension);
}
//
// Check to see if we are requesting a valid mode
//
if ( (Mode->RequestedMode >= NumVideoModes) ||
(!ModesVGA[Mode->RequestedMode].ValidMode) ) {
VideoDebugPrint((1, "VgaSetMode: ERROR_INVALID_PARAMETER\n"));
return ERROR_INVALID_PARAMETER;
}
pRequestedMode = &ModesVGA[Mode->RequestedMode];
#ifdef INT10_MODE_SET
//
// Make sure we unlock extended registers since the BIOS on some machines
// does not do it properly.
//
VideoPortWritePortUshort((PUSHORT)(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT), 0x050F);
//
// Initialize CrtAddressPort, and CrtDataPort
//
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
MISC_OUTPUT_REG_READ_PORT) & 0x01) {
bIsColor = TRUE;
CrtAddressPort = HwDeviceExtension->IOAddress + CRTC_ADDRESS_PORT_COLOR;
CrtDataPort = HwDeviceExtension->IOAddress + CRTC_DATA_PORT_COLOR;
} else {
bIsColor = FALSE;
CrtAddressPort = HwDeviceExtension->IOAddress + CRTC_ADDRESS_PORT_MONO;
CrtDataPort = HwDeviceExtension->IOAddress + CRTC_DATA_PORT_MONO;
}
//
// Make sure we unlock extended registers since the BIOS on some machines
// does not do it properly.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, 0x0F);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, 0x05);
VideoPortWritePortUchar(CrtAddressPort, 0x2b);
temp = VideoPortReadPortUchar(CrtDataPort);
//
// Adjust the frequency setting register and write it back out.
// Also support Diamond changes to frequency settings
//
temp &= pRequestedMode->FrequencyMask;
frequencySetting = pRequestedMode->FrequencySetting;
if ( (HwDeviceExtension->BoardID == SPEEDSTAR31) &&
(pRequestedMode->hres == 1024) ) {
//
// Diamond has inversed the refresh rates of interlaced and 72 Hz
// on the 1024 modes
//
if (pRequestedMode->Frequency == 72) {
frequencySetting = 0x00;
} else {
if (pRequestedMode->Frequency == 44) {
frequencySetting = 0x30;
}
}
}
temp |= frequencySetting;
VideoPortWritePortUchar(CrtDataPort, temp);
//
// Mode set block that can be repeated.
//
SetAgain:
//
// Set the mode
//
VideoPortZeroMemory(&biosArguments, sizeof(VIDEO_X86_BIOS_ARGUMENTS));
if (HwDeviceExtension->IsIBM &&
(pRequestedMode->Int10ModeNumber & 0xffff0000))
{
biosArguments.Eax = 0x4f02;
biosArguments.Ebx = pRequestedMode->Int10ModeNumber >> 16;
}
else
{
biosArguments.Eax = pRequestedMode->Int10ModeNumber & 0xff;
}
status = VideoPortInt10(HwDeviceExtension, &biosArguments);
if (status != NO_ERROR) {
return status;
}
//
// Check to see if the modeset worked. If not, then if we
// don't have an SVGA Bios, and do have a modetable, then
// set the mode. Else, fail.
//
if (HwDeviceExtension->BoardID == WD90C24A)
{
biosArguments.Eax = 0x0f00;
VideoPortInt10(HwDeviceExtension, &biosArguments);
if ((biosArguments.Eax & 0xff) != (pRequestedMode->Int10ModeNumber & 0xff))
{
if ((HwDeviceExtension->SVGABios < FULL_SVGA_BIOS) &&
(pRequestedMode->ModeTable != NULL))
{
BOOLEAN bLCD=FALSE;
VideoDebugPrint((1, "\n*** Setting mode with mode table!\n\n"));
//
// NOTE: Certain models of IBM Thinkpads can switch
// between LCD, Monitor, and Simultaneous modes while
// the machine is running. Other models cannot.
// Currently we have noticed a coralation between
// machines which have SVGA Bios's and machines which
// can set the mode.
//
// IF MACHINE HAS SVGA BIOS THEN
// MACHINE CAN TURN ON/OFF LCD ON THE FLY
// ELSE
// MACHINE CANNOT TURN ON/OFF LCD ON THE FLY
//
// If a user has a machine where the LCD can be turned
// on dynamically, then it is possible that the user
// will turn on the LCD when we think it is off. Then
// we may try to set a mode which does not work with
// the LCD off. To avoid this problem, we will try
// to determine if the LCD is on/off before setting
// the mode. If the LCD is on, and it needs to be
// off in order for the modeset to succeed, we'll fail
// the modeset.
//
// Unfortunately, this does not solve all of our
// problems. The code which we use to try to detect
// whether or not the LCD is on fails on some
// machines. The code seems to fail on machines
// which do not have SVGA Bios's. As mentioned above
// machines which do not have SVGA Bios's can not
// switch on their LCD's dynamically. Therefore we
// do not need to execute this special code on these
// machines because the LCD state wont change on us
// anyway.
//
if (HwDeviceExtension->SVGABios > NO_SVGA_BIOS)
{
//
// If the LCD is enabled we also need to SET bit 0
// of PR2.
//
// We will check to see if the LCD is enabled by
// checking bit 2 of CRTC register 0x31, and bit
// 4 of CRTC register 0x32. If either of these
// is set, then we'll assume an LCD is enabled.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR, 0x31);
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR) & 0x04)
{
bLCD = TRUE;
}
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR, 0x32);
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR) & 0x10)
{
bLCD = TRUE;
}
//
// For some reason, on the 755CDV, if we set a high res mode,
// while the LCD is on, then the LCD won't be disabled
// properly. Therefore, fail the mode set if the LCD
// is on, and we need to turn it off to set this mode.
//
if (bLCD &&
!(HwDeviceExtension->DisplayType &
pRequestedMode->LCDtype &
~MONITOR))
{
return ERROR_INVALID_PARAMETER;
}
}
VgaSetActiveDisplay(HwDeviceExtension, LCD_DISABLE | CRT_ENABLE);
VgaInterpretCmdStream(HwDeviceExtension, pRequestedMode->ModeTable);
//
// if the LCD can do this mode, then turn the LCD
// back on. Else, leave it off.
//
// add the code!!
//
if (pRequestedMode->LCDtype & HwDeviceExtension->DisplayType & ~MONITOR)
{
VgaSetActiveDisplay(HwDeviceExtension, LCD_ENABLE | CRT_ENABLE);
VideoDebugPrint((1, "LCD Enabled!\n"));
}
else
{
VgaSetActiveDisplay(HwDeviceExtension, LCD_DISABLE | CRT_ENABLE);
VideoDebugPrint((1, "LCD Disabled!\n"));
}
}
else
{
return ERROR_INVALID_PARAMETER;
}
}
}
if (pRequestedMode->CmdStrings != NULL)
{
VgaInterpretCmdStream(HwDeviceExtension, pRequestedMode->CmdStrings);
}
if (!(pRequestedMode->fbType & VIDEO_MODE_GRAPHICS)) {
//
// Fix to make sure we always set the colors in text mode to be
// intensity, and not flashing
// For this zero out the Mode Control Regsiter bit 3 (index 0x10
// of the Attribute controller).
//
if (bIsColor) {
dummy = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_1_COLOR);
} else {
dummy = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_1_MONO);
}
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
ATT_ADDRESS_PORT, (0x10 | VIDEO_ENABLE));
temp = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
ATT_DATA_READ_PORT);
temp &= 0xF7;
if (bIsColor) {
dummy = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_1_COLOR);
} else {
dummy = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_1_MONO);
}
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
ATT_ADDRESS_PORT, (0x10 | VIDEO_ENABLE));
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
ATT_DATA_WRITE_PORT, temp);
}
//
// A few wd cards do not work properly on the first mode set. You have
// to set the mode twice. So lets set it twice!
//
if (bModeFirst == 1 && HwDeviceExtension->BoardID != WD90C24A)
{
bModeFirst = 0;
goto SetAgain;
}
#else
VgaInterpretCmdStream(HwDeviceExtension, pRequestedMode->CmdStrings);
#endif
//
// Make sure we unlock extended registers since the BIOS on some machines
// does not do it properly.
//
VideoPortWritePortUshort((PUSHORT)(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT), 0x050F);
if (HwDeviceExtension->BoardID == WD90C24A)
{
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_PIXEL_MASK_PORT, 0xFF);
}
//
// Update the location of the physical frame buffer within video memory.
//
HwDeviceExtension->PhysicalFrameLength =
MemoryMaps[pRequestedMode->MemMap].MaxSize;
HwDeviceExtension->PhysicalFrameBase.LowPart =
MemoryMaps[pRequestedMode->MemMap].Start;
//
// Store the new mode value.
//
HwDeviceExtension->CurrentMode = pRequestedMode;
HwDeviceExtension->ModeIndex = Mode->RequestedMode;
return NO_ERROR;
} //end VgaSetMode()
VP_STATUS
VgaQueryAvailableModes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_MODE_INFORMATION ModeInformation,
ULONG ModeInformationSize,
PULONG OutputSize
)
/*++
Routine Description:
This routine returns the list of all available available modes on the
card.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
ModeInformation - Pointer to the output buffer supplied by the user.
This is where the list of all valid modes is stored.
ModeInformationSize - Length of the output buffer supplied by the user.
OutputSize - Pointer to a buffer in which to return the actual size of
the data in the buffer. If the buffer was not large enough, this
contains the minimum required buffer size.
Return Value:
ERROR_INSUFFICIENT_BUFFER if the output buffer was not large enough
for the data being returned.
NO_ERROR if the operation completed successfully.
--*/
{
PVIDEO_MODE_INFORMATION videoModes = ModeInformation;
ULONG i;
//
// Find out the size of the data to be put in the buffer and return
// that in the status information (whether or not the information is
// there). If the buffer passed in is not large enough return an
// appropriate error code.
//
if (ModeInformationSize < (*OutputSize =
HwDeviceExtension->NumAvailableModes *
sizeof(VIDEO_MODE_INFORMATION)) ) {
return ERROR_INSUFFICIENT_BUFFER;
}
//
// For each mode supported by the card, store the mode characteristics
// in the output buffer.
//
for (i = 0; i < NumVideoModes; i++) {
if (ModesVGA[i].ValidMode) {
videoModes->Length = sizeof(VIDEO_MODE_INFORMATION);
videoModes->ModeIndex = i;
videoModes->VisScreenWidth = ModesVGA[i].hres;
videoModes->ScreenStride = ModesVGA[i].wbytes;
videoModes->VisScreenHeight = ModesVGA[i].vres;
videoModes->NumberOfPlanes = ModesVGA[i].numPlanes;
videoModes->BitsPerPlane = ModesVGA[i].bitsPerPlane;
videoModes->Frequency = ModesVGA[i].Frequency;
videoModes->XMillimeter = 320; // temporary hardcoded constant
videoModes->YMillimeter = 240; // temporary hardcoded constant
videoModes->AttributeFlags = ModesVGA[i].fbType;
videoModes->AttributeFlags |= ModesVGA[i].Interlaced ?
VIDEO_MODE_INTERLACED : 0;
videoModes->DriverSpecificAttributeFlags = 0;
//
// Calculate the VideoMemoryBitmapWidth
//
{
LONG x;
x = videoModes->BitsPerPlane;
if( x == 15 ) x = 16;
videoModes->VideoMemoryBitmapWidth =
(videoModes->ScreenStride * 8 ) / x;
}
videoModes->VideoMemoryBitmapHeight =
HwDeviceExtension->AdapterMemorySize / videoModes->ScreenStride;
if (ModesVGA[i].bitsPerPlane == 16)
{
videoModes->NumberRedBits = 5;
videoModes->NumberGreenBits = 6;
videoModes->NumberBlueBits = 5;
videoModes->RedMask = 0xF800;
videoModes->GreenMask = 0x07E0;
videoModes->BlueMask = 0x001F;
}
else
{
videoModes->NumberRedBits = 6;
videoModes->NumberGreenBits = 6;
videoModes->NumberBlueBits = 6;
videoModes->RedMask = 0;
videoModes->GreenMask = 0;
videoModes->BlueMask = 0;
videoModes->AttributeFlags |= VIDEO_MODE_PALETTE_DRIVEN |
VIDEO_MODE_MANAGED_PALETTE;
}
videoModes++;
}
}
return NO_ERROR;
} // end VgaGetAvailableModes()
VP_STATUS
VgaQueryNumberOfAvailableModes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_NUM_MODES NumModes,
ULONG NumModesSize,
PULONG OutputSize
)
/*++
Routine Description:
This routine returns the number of available modes for this particular
video card.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
NumModes - Pointer to the output buffer supplied by the user. This is
where the number of modes is stored.
NumModesSize - Length of the output buffer supplied by the user.
OutputSize - Pointer to a buffer in which to return the actual size of
the data in the buffer.
Return Value:
ERROR_INSUFFICIENT_BUFFER if the output buffer was not large enough
for the data being returned.
NO_ERROR if the operation completed successfully.
--*/
{
//
// Find out the size of the data to be put in the the buffer and return
// that in the status information (whether or not the information is
// there). If the buffer passed in is not large enough return an
// appropriate error code.
//
if (NumModesSize < (*OutputSize = sizeof(VIDEO_NUM_MODES)) ) {
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Validate the modes each time on the portables since an external monitor
// can be connected or disconnected dynamically.
//
VgaValidateModes(HwDeviceExtension);
//
// Store the number of modes into the buffer.
//
NumModes->NumModes = HwDeviceExtension->NumAvailableModes;
NumModes->ModeInformationLength = sizeof(VIDEO_MODE_INFORMATION);
return NO_ERROR;
} // end VgaGetNumberOfAvailableModes()
VP_STATUS
VgaQueryCurrentMode(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_MODE_INFORMATION ModeInformation,
ULONG ModeInformationSize,
PULONG OutputSize
)
/*++
Routine Description:
This routine returns a description of the current video mode.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
ModeInformation - Pointer to the output buffer supplied by the user.
This is where the current mode information is stored.
ModeInformationSize - Length of the output buffer supplied by the user.
OutputSize - Pointer to a buffer in which to return the actual size of
the data in the buffer. If the buffer was not large enough, this
contains the minimum required buffer size.
Return Value:
ERROR_INSUFFICIENT_BUFFER if the output buffer was not large enough
for the data being returned.
NO_ERROR if the operation completed successfully.
--*/
{
//
//
// check if a mode has been set
//
if (HwDeviceExtension->CurrentMode == NULL) {
return ERROR_INVALID_FUNCTION;
}
//
// Find out the size of the data to be put in the the buffer and return
// that in the status information (whether or not the information is
// there). If the buffer passed in is not large enough return an
// appropriate error code.
//
if (ModeInformationSize < (*OutputSize = sizeof(VIDEO_MODE_INFORMATION))) {
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Store the characteristics of the current mode into the buffer.
//
ModeInformation->Length = sizeof(VIDEO_MODE_INFORMATION);
ModeInformation->ModeIndex = HwDeviceExtension->ModeIndex;
ModeInformation->VisScreenWidth = HwDeviceExtension->CurrentMode->hres;
ModeInformation->ScreenStride = HwDeviceExtension->CurrentMode->wbytes;
ModeInformation->VisScreenHeight = HwDeviceExtension->CurrentMode->vres;
ModeInformation->NumberOfPlanes = HwDeviceExtension->CurrentMode->numPlanes;
ModeInformation->BitsPerPlane = HwDeviceExtension->CurrentMode->bitsPerPlane;
ModeInformation->Frequency = HwDeviceExtension->CurrentMode->Frequency;
ModeInformation->XMillimeter = 320; // temporary hardcoded constant
ModeInformation->YMillimeter = 240; // temporary hardcoded constant
ModeInformation->AttributeFlags = HwDeviceExtension->CurrentMode->fbType |
(HwDeviceExtension->CurrentMode->Interlaced ?
VIDEO_MODE_INTERLACED : 0);
ModeInformation->DriverSpecificAttributeFlags = 0;
if (ModeInformation->BitsPerPlane == 16) {
ModeInformation->NumberRedBits = 5;
ModeInformation->NumberGreenBits = 6;
ModeInformation->NumberBlueBits = 5;
ModeInformation->RedMask = 0xF800;
ModeInformation->GreenMask = 0x07E0;
ModeInformation->BlueMask = 0x1F;
} else {
ModeInformation->NumberRedBits = 6;
ModeInformation->NumberGreenBits = 6;
ModeInformation->NumberBlueBits = 6;
ModeInformation->RedMask = 0;
ModeInformation->GreenMask = 0;
ModeInformation->BlueMask = 0;
ModeInformation->AttributeFlags |=
VIDEO_MODE_PALETTE_DRIVEN | VIDEO_MODE_MANAGED_PALETTE;
}
//
// Calculate the VideoMemoryBitmapWidth
//
{
LONG x;
x = ModeInformation->BitsPerPlane;
if( x == 15 ) x = 16;
ModeInformation->VideoMemoryBitmapWidth =
(ModeInformation->ScreenStride * 8 ) / x;
}
ModeInformation->VideoMemoryBitmapHeight =
HwDeviceExtension->AdapterMemorySize / ModeInformation->ScreenStride;
return NO_ERROR;
} // end VgaQueryCurrentMode()
VOID
VgaZeroVideoMemory(
PHW_DEVICE_EXTENSION HwDeviceExtension
)
/*++
Routine Description:
This routine zeros the first 256K on the VGA.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
Return Value:
None.
--*/
{
UCHAR temp;
//
// Map font buffer at A0000
//
VgaInterpretCmdStream(HwDeviceExtension, EnableA000Data);
//
// Enable all planes.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + SEQ_ADDRESS_PORT,
IND_MAP_MASK);
temp = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT) | (UCHAR)0x0F;
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + SEQ_DATA_PORT,
temp);
//
// Zero the memory.
//
VideoPortZeroDeviceMemory(HwDeviceExtension->VideoMemoryAddress, 0xFFFF);
VgaInterpretCmdStream(HwDeviceExtension, DisableA000Color);
}
VOID
VgaValidateModes(
PHW_DEVICE_EXTENSION HwDeviceExtension
)
/*++
Routine Description:
Determines which modes are valid and which are not.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
Return Value:
None.
--*/
{
ULONG i;
HwDeviceExtension->NumAvailableModes = 0;
VideoDebugPrint((1, "VgaValidateModes:\n"));
VideoDebugPrint((1, "Avail Adapter Mem: 0x%x\n"
"Avail Monitor Type: 0x%x\n",
HwDeviceExtension->AdapterMemorySize,
HwDeviceExtension->DisplayType));
for (i = 0; i < NumVideoModes; i++) {
VideoDebugPrint((1, "Mode %d %dx%d at %d bpp\n"
"\tAdapterMemoryRequired: 0x%x\n"
"\tMonitorType 0x%x\n",
i, ModesVGA[i].hres, ModesVGA[i].vres,
ModesVGA[i].bitsPerPlane * ModesVGA[i].numPlanes,
ModesVGA[i].numPlanes * ModesVGA[i].sbytes,
ModesVGA[i].LCDtype));
if ((HwDeviceExtension->AdapterMemorySize >=
ModesVGA[i].numPlanes * ModesVGA[i].sbytes) &&
(HwDeviceExtension->DisplayType &
ModesVGA[i].LCDtype))
{
ModesVGA[i].ValidMode = TRUE;
HwDeviceExtension->NumAvailableModes++;
}
//
// invalidates some modes we may have enabled based on some specific
// chip\machine problems
//
if ( (ModesVGA[i].ValidMode) &&
(HwDeviceExtension->BoardID == WD90C24A))
{
if (HwDeviceExtension->IsIBM == TRUE)
{
//
// get rid of 256 color modes > 640x480 on
// machines with STN displays
//
if ((ModesVGA[i].bitsPerPlane == 8) &&
(ModesVGA[i].hres > 640) &&
(HwDeviceExtension->DisplayType & TOSHIBA_DSTNC))
{
ModesVGA[i].ValidMode = FALSE;
HwDeviceExtension->NumAvailableModes--;
}
//
// get rid of 64K color support for machines without
// SVGABios support
//
else if ((ModesVGA[i].bitsPerPlane == 16) &&
(HwDeviceExtension->SVGABios == NO_SVGA_BIOS))
{
ModesVGA[i].ValidMode = FALSE;
HwDeviceExtension->NumAvailableModes--;
}
}
}
//
// 16bpp modes only work on the WD90C24A chip sets.
//
if( (ModesVGA[i].ValidMode) &&
(HwDeviceExtension->BoardID != WD90C24A) &&
(ModesVGA[i].bitsPerPlane == 16))
{
ModesVGA[i].ValidMode = FALSE;
HwDeviceExtension->NumAvailableModes--;
}
//
// Older boards do not support 72HZ in 1024x768 modes.
// So disable those.
//
if ( (ModesVGA[i].ValidMode) &&
(HwDeviceExtension->BoardID < WD90C31) &&
(ModesVGA[i].hres == 1024) &&
(ModesVGA[i].vres == 768) &&
(ModesVGA[i].Frequency == 72) )
{
ModesVGA[i].ValidMode = FALSE;
HwDeviceExtension->NumAvailableModes--;
}
if (ModesVGA[i].ValidMode == FALSE)
{
VideoDebugPrint((1, "The mode is not valid.\n"));
}
else
{
VideoDebugPrint((1, "The mode is valid.\n"));
}
}
}
BOOLEAN
ExternalMonitorPresent(
PHW_DEVICE_EXTENSION HwDeviceExtension
)
/*++
Routine Description:
Determine whether an external monitor is connected to the
machine. This routine should only be called if the
BoardID == WD90C24A.
Note: This routine expects to be called after the WD extended
registers have been unlocked.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
Return Value:
Updated the DisplayType field in HwDeviceExtension to indicate
whether a monitor is connected.
The routine always returns TRUE.
--*/
{
UCHAR dac[3];
UCHAR _pr19, _pr1b;
int i,j;
int bExternal = 0;
//
// If we are on an IBM machine, use SMAPI routines
// instead of detetecting the monitor ourselves.
//
if (HwDeviceExtension->IsIBM)
{
bExternal = LCDIsMonitorPresent();
if (bExternal)
{
HwDeviceExtension->DisplayType |= MONITOR;
}
else
{
HwDeviceExtension->DisplayType &= ~MONITOR;
}
return TRUE;
}
//
// Only refresh display with value in DAC 0
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_PIXEL_MASK_PORT, 0x00);
//
// lets preserve what's in the DAC
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_READ_PORT,
(UCHAR) 0);
for (j=0; j<3; j++)
{
dac[j]= VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT);
}
//
// Fill in DAC 0 with a value for the test
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + DAC_ADDRESS_WRITE_PORT, 0);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + DAC_DATA_REG_PORT, 0x04); // Red
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + DAC_DATA_REG_PORT, 0x12); // Green
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + DAC_DATA_REG_PORT, 0x04); // Blue
//
// We need to check bit 4 of 0x3c2. We only want to check
// this bit during actual display output. Therefore we will
// wait for a vertical refresh, and then try to wait 300
// nanoseconds for the monitor detection circuits to
// stabalize, and then read the bit. (I may have to adjust
// crtc registers to prevent refresh cycles).
//
// There are two bits in the Input Status #1 Register which
// will help us to detect if we are in a refresh cycle. If
// bit 3 is on then we are in a verticle refresh. If bit 0
// is off (0) then we are in a display mode, else we are in
// some sort of a refresh.
//
// Therefore, for our purposes, we will do the following. We
// will wait for a verticle refresh (bit 3 = 1) then we will
// wait for it to turn off. We are now starting to draw the
// screen. Now we will examine the monitor connection bit
// (bit 4 of 0x3c2) until the display mode bit (bit 0 of
// 0x3da) goes high. Now we will use our last recorded value
// for monitor detection.
//
//
// wait for V retrace
//
while ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_1_COLOR) & 0x8) == 0);
//
// wait for V retrace to end
//
while ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_1_COLOR) & 0x8) != 0);
//
// wait for display enable to start
//
while ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_1_COLOR) & 0x1) != 0);
//
// wait for display enable to end. Use last value of
// bExternal to determine if an external monitor is
// connected.
//
{
int LoopCount=0, OnCount=0;
bExternal = FALSE;
while ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_1_COLOR) & 0x1) == 0)
{
if ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_0_PORT) & 0x10) == 0x10)
{
OnCount++;
}
LoopCount++;
}
if (OnCount > (LoopCount / 2)) // should compile as LoopCount >> 1
{
bExternal = TRUE;
}
}
//
// restore the DAC
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_WRITE_PORT,
(UCHAR) 0);
for (j=0; j<3; j++)
{
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT,
dac[j]);
}
//
// Re-enable the DAC
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_PIXEL_MASK_PORT, 0xFF);
//
// restore _pr19, and _pr1b state
//
if (bExternal)
{
HwDeviceExtension->DisplayType |= MONITOR;
}
else
{
HwDeviceExtension->DisplayType &= ~MONITOR;
}
return TRUE;
}
VP_STATUS
VgaSetActiveDisplay(
PHW_DEVICE_EXTENSION HwDeviceExtension,
ULONG ActiveDisplay
)
/*++
Routine Description:
This routine selects the active display device(s).
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
ActiveDisplay - Devices to be active.
(See WD90C24A.H for the definition)
Return Value:
If successful, return NO_ERROR, else return FALSE.
--*/
{
VP_STATUS status = ERROR_INVALID_PARAMETER;
//
// Unlock paradise registers
//
UnlockAll(HwDeviceExtension);
//
// Enable or Disable LCD output
//
// Note: To prevent the fuse of LCD from blowing up, LCD should be turns off
// while output is disabled.
//
// If VideoPortPowerControl() returns an error for the absence of HALPM.SYS,
// we will try to control LCD by accessing the hardware directly.
//
if (ActiveDisplay & LCD_ENABLE) {
EnableLCD(HwDeviceExtension);
} else if (ActiveDisplay & LCD_DISABLE) {
DisableLCD(HwDeviceExtension);
}
//
// Enable or Disable CRT output
//
if (ActiveDisplay & CRT_ENABLE) {
EnableCRT(HwDeviceExtension);
} else {
DisableCRT(HwDeviceExtension);
}
return NO_ERROR;
} // end VgaSetActiveDisplay()
VOID
DisableLCD(
PHW_DEVICE_EXTENSION HwDeviceExtension
)
/*++
Routine Description:
This routine disables LCD interface of WD90C24A/A2.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's adapter information.
Return Value:
None.
--*/
{
PUCHAR IoBase = HwDeviceExtension->IOAddress;
//
// Wait until next vertical retrace interval
//
while (0 == (VideoPortReadPortUchar(IoBase + INPUT_STATUS_1_COLOR) & 0x08));
//
// Disables LCD interface
//
VideoPortWritePortUchar(IoBase + CRTC_ADDRESS_PORT_COLOR, pr19);
VideoPortWritePortUchar(
IoBase + CRTC_DATA_PORT_COLOR,
(UCHAR)(VideoPortReadPortUchar(IoBase + CRTC_DATA_PORT_COLOR) & ~0x10));
//
// Tristates LCD control and data signals
//
VideoPortWritePortUchar(IoBase + GRAPH_ADDRESS_PORT, pr4);
VideoPortWritePortUchar(
IoBase + GRAPH_DATA_PORT,
(CHAR)(VideoPortReadPortUchar(IoBase + GRAPH_DATA_PORT) | 0x20));
//
// Unlocks CRTC shadow registers
//
VideoPortWritePortUshort(
(PUSHORT)(IoBase + CRTC_ADDRESS_PORT_COLOR),
(USHORT)pr1b | ((USHORT)pr1b_unlock << 8));
} // end DisableLCD()
VOID
EnableLCD(
PHW_DEVICE_EXTENSION HwDeviceExtension
)
/*++
Routine Description:
This routine enables LCD interface of WD90C24A/A2.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's adapter information.
Return Value:
None.
--*/
{
PUCHAR IoBase = HwDeviceExtension->IOAddress;
//
// Locks CRTC shadow registers
//
VideoPortWritePortUshort(
(PUSHORT)(IoBase + CRTC_ADDRESS_PORT_COLOR),
(USHORT)pr1b | ((USHORT)pr1b_unlock_pr << 8));
//
// Wait until next vertical retrace interval
//
while (0 == (VideoPortReadPortUchar(IoBase + INPUT_STATUS_1_COLOR) & 0x08));
//
// Drives LCD control and data signals
//
VideoPortWritePortUchar(IoBase + GRAPH_ADDRESS_PORT, pr4);
VideoPortWritePortUchar(
IoBase + GRAPH_DATA_PORT,
(CHAR)(VideoPortReadPortUchar(IoBase + GRAPH_DATA_PORT) & ~0x20));
//
// Enables LCD interface
//
VideoPortWritePortUchar(IoBase + CRTC_ADDRESS_PORT_COLOR, pr19);
VideoPortWritePortUchar(
IoBase + CRTC_DATA_PORT_COLOR,
(CHAR)(VideoPortReadPortUchar(IoBase + CRTC_DATA_PORT_COLOR) | 0x10));
} // end EnableLCD()
VOID
DisableCRT(
PHW_DEVICE_EXTENSION HwDeviceExtension
)
/*++
Routine Description:
This routine disables CRT interface of WD90C24A/A2
Arguments:
HwDeviceExtension - Pointer to the miniport driver's adapter information.
Return Value:
None.
--*/
{
PUCHAR IoBase = HwDeviceExtension->IOAddress;
//
// Disables CRT interface
//
VideoPortWritePortUchar(IoBase + CRTC_ADDRESS_PORT_COLOR, pr19);
VideoPortWritePortUchar(
IoBase + CRTC_DATA_PORT_COLOR,
(UCHAR)(VideoPortReadPortUchar(IoBase + CRTC_DATA_PORT_COLOR) & ~0x20));
//
// Shuts off internal RAMDAC
//
VideoPortWritePortUchar(IoBase + CRTC_ADDRESS_PORT_COLOR, pr18);
VideoPortWritePortUchar(
IoBase + CRTC_DATA_PORT_COLOR,
(UCHAR)(VideoPortReadPortUchar(IoBase + CRTC_DATA_PORT_COLOR) | 0x80));
//
// Disables CRT H-sync and V-sync signals
//
VideoPortWritePortUchar(IoBase + CRTC_ADDRESS_PORT_COLOR, pr39);
VideoPortWritePortUchar(
IoBase + CRTC_DATA_PORT_COLOR,
(UCHAR)(VideoPortReadPortUchar(IoBase + CRTC_DATA_PORT_COLOR) & ~0x04));
} // end DisableCRT()
VOID
EnableCRT(
PHW_DEVICE_EXTENSION HwDeviceExtension
)
/*++
Routine Description:
This routine enables CRT interface of WD90C24A/A2
Arguments:
HwDeviceExtension - Pointer to the miniport driver's adapter information.
Return Value:
None.
--*/
{
PUCHAR IoBase = HwDeviceExtension->IOAddress;
//
// Enables CRT interface
//
VideoPortWritePortUchar(IoBase + CRTC_ADDRESS_PORT_COLOR, pr19);
VideoPortWritePortUchar(
IoBase + CRTC_DATA_PORT_COLOR,
(UCHAR)(VideoPortReadPortUchar(IoBase + CRTC_DATA_PORT_COLOR) | 0x20));
//
// Enables internal RAMDAC
//
VideoPortWritePortUchar(IoBase + CRTC_ADDRESS_PORT_COLOR, pr18);
VideoPortWritePortUchar(
IoBase + CRTC_DATA_PORT_COLOR,
(UCHAR)(VideoPortReadPortUchar(IoBase + CRTC_DATA_PORT_COLOR) & ~0x80));
//
// Enables CRT H-sync and V-sync signals
//
VideoPortWritePortUchar(IoBase + CRTC_ADDRESS_PORT_COLOR, pr39);
VideoPortWritePortUchar(
IoBase + CRTC_DATA_PORT_COLOR,
(UCHAR)(VideoPortReadPortUchar(IoBase + CRTC_DATA_PORT_COLOR) | 0x04));
} // end EnableCRT()
VOID
UnlockAll(
PHW_DEVICE_EXTENSION HwDeviceExtension
)
/*++
Routine Description:
This routine unlocks all WD registers, except CRTC shadow registers
Arguments:
HwDeviceExtension - Pointer to the miniport driver's adapter information.
Return Value:
None.
--*/
{
PUCHAR IoBase = HwDeviceExtension->IOAddress;
//
// Unlocks the all WD registers
//
VideoPortWritePortUshort(
(PUSHORT)(IoBase + GRAPH_ADDRESS_PORT),
(USHORT)pr5 | ((USHORT)pr5_unlock << 8));
VideoPortWritePortUshort(
(PUSHORT)(IoBase + CRTC_ADDRESS_PORT_COLOR),
(USHORT)pr10 | ((USHORT)pr10_unlock << 8));
VideoPortWritePortUshort(
(PUSHORT)(IoBase + CRTC_ADDRESS_PORT_COLOR),
(USHORT)pr11 | ((USHORT)pr11_unlock << 8));
VideoPortWritePortUshort(
(PUSHORT)(IoBase + SEQ_ADDRESS_PORT),
(USHORT)pr20 | ((USHORT)pr20_unlock << 8));
VideoPortWritePortUshort(
(PUSHORT)(IoBase + SEQ_ADDRESS_PORT),
(USHORT)pr72 | ((USHORT)pr72_unlock << 8));
VideoPortWritePortUshort(
(PUSHORT)(IoBase + CRTC_ADDRESS_PORT_COLOR),
(USHORT)pr1b | ((USHORT)pr1b_unlock_pr << 8));
VideoPortWritePortUshort(
(PUSHORT)(IoBase + CRTC_ADDRESS_PORT_COLOR),
(USHORT)pr30 | ((USHORT)pr30_unlock << 8));
return;
} // end UnlockAll()
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