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|
/**@file
This driver produces a VGA console.
Copyright (c) 2006, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "VgaClass.h"
//
// EFI Driver Binding Protocol for the VGA Class Driver
//
EFI_DRIVER_BINDING_PROTOCOL gVgaClassDriverBinding = {
VgaClassDriverBindingSupported,
VgaClassDriverBindingStart,
VgaClassDriverBindingStop,
0xa,
NULL,
NULL
};
/**
The user Entry Point for module VgaClass. The user code starts with this function.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
InitializeVgaClass(
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Install driver model protocol(s).
//
Status = EfiLibInstallDriverBindingComponentName2 (
ImageHandle,
SystemTable,
&gVgaClassDriverBinding,
ImageHandle,
&gVgaClassComponentName,
&gVgaClassComponentName2
);
ASSERT_EFI_ERROR (Status);
return Status;
}
//
// Local variables
//
CHAR16 CrLfString[3] = { CHAR_CARRIAGE_RETURN, CHAR_LINEFEED, CHAR_NULL };
typedef struct {
CHAR16 Unicode;
CHAR8 PcAnsi;
CHAR8 Ascii;
} UNICODE_TO_CHAR;
//
// This list is used to define the valid extend chars.
// It also provides a mapping from Unicode to PCANSI or
// ASCII. The ASCII mapping we just made up.
//
//
UNICODE_TO_CHAR UnicodeToPcAnsiOrAscii[] = {
{
BOXDRAW_HORIZONTAL,
0xc4,
L'-'
},
{
BOXDRAW_VERTICAL,
0xb3,
L'|'
},
{
BOXDRAW_DOWN_RIGHT,
0xda,
L'/'
},
{
BOXDRAW_DOWN_LEFT,
0xbf,
L'\\'
},
{
BOXDRAW_UP_RIGHT,
0xc0,
L'\\'
},
{
BOXDRAW_UP_LEFT,
0xd9,
L'/'
},
{
BOXDRAW_VERTICAL_RIGHT,
0xc3,
L'|'
},
{
BOXDRAW_VERTICAL_LEFT,
0xb4,
L'|'
},
{
BOXDRAW_DOWN_HORIZONTAL,
0xc2,
L'+'
},
{
BOXDRAW_UP_HORIZONTAL,
0xc1,
L'+'
},
{
BOXDRAW_VERTICAL_HORIZONTAL,
0xc5,
L'+'
},
{
BOXDRAW_DOUBLE_HORIZONTAL,
0xcd,
L'-'
},
{
BOXDRAW_DOUBLE_VERTICAL,
0xba,
L'|'
},
{
BOXDRAW_DOWN_RIGHT_DOUBLE,
0xd5,
L'/'
},
{
BOXDRAW_DOWN_DOUBLE_RIGHT,
0xd6,
L'/'
},
{
BOXDRAW_DOUBLE_DOWN_RIGHT,
0xc9,
L'/'
},
{
BOXDRAW_DOWN_LEFT_DOUBLE,
0xb8,
L'\\'
},
{
BOXDRAW_DOWN_DOUBLE_LEFT,
0xb7,
L'\\'
},
{
BOXDRAW_DOUBLE_DOWN_LEFT,
0xbb,
L'\\'
},
{
BOXDRAW_UP_RIGHT_DOUBLE,
0xd4,
L'\\'
},
{
BOXDRAW_UP_DOUBLE_RIGHT,
0xd3,
L'\\'
},
{
BOXDRAW_DOUBLE_UP_RIGHT,
0xc8,
L'\\'
},
{
BOXDRAW_UP_LEFT_DOUBLE,
0xbe,
L'/'
},
{
BOXDRAW_UP_DOUBLE_LEFT,
0xbd,
L'/'
},
{
BOXDRAW_DOUBLE_UP_LEFT,
0xbc,
L'/'
},
{
BOXDRAW_VERTICAL_RIGHT_DOUBLE,
0xc6,
L'|'
},
{
BOXDRAW_VERTICAL_DOUBLE_RIGHT,
0xc7,
L'|'
},
{
BOXDRAW_DOUBLE_VERTICAL_RIGHT,
0xcc,
L'|'
},
{
BOXDRAW_VERTICAL_LEFT_DOUBLE,
0xb5,
L'|'
},
{
BOXDRAW_VERTICAL_DOUBLE_LEFT,
0xb6,
L'|'
},
{
BOXDRAW_DOUBLE_VERTICAL_LEFT,
0xb9,
L'|'
},
{
BOXDRAW_DOWN_HORIZONTAL_DOUBLE,
0xd1,
L'+'
},
{
BOXDRAW_DOWN_DOUBLE_HORIZONTAL,
0xd2,
L'+'
},
{
BOXDRAW_DOUBLE_DOWN_HORIZONTAL,
0xcb,
L'+'
},
{
BOXDRAW_UP_HORIZONTAL_DOUBLE,
0xcf,
L'+'
},
{
BOXDRAW_UP_DOUBLE_HORIZONTAL,
0xd0,
L'+'
},
{
BOXDRAW_DOUBLE_UP_HORIZONTAL,
0xca,
L'+'
},
{
BOXDRAW_VERTICAL_HORIZONTAL_DOUBLE,
0xd8,
L'+'
},
{
BOXDRAW_VERTICAL_DOUBLE_HORIZONTAL,
0xd7,
L'+'
},
{
BOXDRAW_DOUBLE_VERTICAL_HORIZONTAL,
0xce,
L'+'
},
{
BLOCKELEMENT_FULL_BLOCK,
0xdb,
L'*'
},
{
BLOCKELEMENT_LIGHT_SHADE,
0xb0,
L'+'
},
{
GEOMETRICSHAPE_UP_TRIANGLE,
0x1e,
L'^'
},
{
GEOMETRICSHAPE_RIGHT_TRIANGLE,
0x10,
L'>'
},
{
GEOMETRICSHAPE_DOWN_TRIANGLE,
0x1f,
L'v'
},
{
GEOMETRICSHAPE_LEFT_TRIANGLE,
0x11,
L'<'
},
{
ARROW_LEFT,
0x3c,
L'<'
},
{
ARROW_UP,
0x18,
L'^'
},
{
ARROW_RIGHT,
0x3e,
L'>'
},
{
ARROW_DOWN,
0x19,
L'v'
},
{
0x0000,
0x00,
0x00
}
};
//
// Private worker functions
//
VOID
SetVideoCursorPosition (
IN VGA_CLASS_DEV *VgaClassDev,
IN UINTN Column,
IN UINTN Row,
IN UINTN MaxColumn
);
VOID
WriteCrtc (
IN VGA_CLASS_DEV *VgaClassDev,
IN UINT16 Address,
IN UINT8 Data
);
BOOLEAN
LibIsValidTextGraphics (
IN CHAR16 Graphic,
OUT CHAR8 *PcAnsi, OPTIONAL
OUT CHAR8 *Ascii OPTIONAL
);
BOOLEAN
IsValidAscii (
IN CHAR16 Ascii
);
BOOLEAN
IsValidEfiCntlChar (
IN CHAR16 c
);
/**
Test to see if this driver supports ControllerHandle. Any ControllerHandle
than contains a VgaMiniPort and PciIo protocol can be supported.
@param This Protocol instance pointer.
@param ControllerHandle Handle of device to test
@param RemainingDevicePath Optional parameter use to pick a specific child
device to start.
@retval EFI_SUCCESS This driver supports this device
@retval EFI_ALREADY_STARTED This driver is already running on this device
@retval other This driver does not support this device
**/
EFI_STATUS
EFIAPI
VgaClassDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
EFI_VGA_MINI_PORT_PROTOCOL *VgaMiniPort;
//
// Open the IO Abstraction(s) needed to perform the supported test
//
Status = gBS->OpenProtocol (
Controller,
&gEfiVgaMiniPortProtocolGuid,
(VOID **) &VgaMiniPort,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Open the IO Abstraction(s) needed to perform the supported test
//
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
NULL,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
return Status;
}
/**
Start this driver on ControllerHandle by opening a PciIo and VgaMiniPort
protocol, creating VGA_CLASS_DEV device and install gEfiSimpleTextOutProtocolGuid
finnally.
@param This Protocol instance pointer.
@param ControllerHandle Handle of device to bind driver to
@param RemainingDevicePath Optional parameter use to pick a specific child
device to start.
@retval EFI_SUCCESS This driver is added to ControllerHandle
@retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle
@retval other This driver does not support this device
**/
EFI_STATUS
EFIAPI
VgaClassDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
EFI_VGA_MINI_PORT_PROTOCOL *VgaMiniPort;
EFI_PCI_IO_PROTOCOL *PciIo;
VGA_CLASS_DEV *VgaClassPrivate;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
Status = gBS->HandleProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
(VOID **) &DevicePath
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Report that VGA Class driver is being enabled
//
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
EFI_PERIPHERAL_LOCAL_CONSOLE | EFI_P_PC_ENABLE,
DevicePath
);
//
// Open the IO Abstraction(s) needed
//
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = gBS->OpenProtocol (
Controller,
&gEfiVgaMiniPortProtocolGuid,
(VOID **) &VgaMiniPort,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Allocate the private device structure
//
Status = gBS->AllocatePool (
EfiBootServicesData,
sizeof (VGA_CLASS_DEV),
(VOID **) &VgaClassPrivate
);
if (EFI_ERROR (Status)) {
gBS->CloseProtocol (
Controller,
&gEfiVgaMiniPortProtocolGuid,
This->DriverBindingHandle,
Controller
);
return EFI_OUT_OF_RESOURCES;
}
ZeroMem (VgaClassPrivate, sizeof (VGA_CLASS_DEV));
//
// Initialize the private device structure
//
VgaClassPrivate->Signature = VGA_CLASS_DEV_SIGNATURE;
VgaClassPrivate->Handle = Controller;
VgaClassPrivate->VgaMiniPort = VgaMiniPort;
VgaClassPrivate->PciIo = PciIo;
VgaClassPrivate->SimpleTextOut.Reset = VgaClassReset;
VgaClassPrivate->SimpleTextOut.OutputString = VgaClassOutputString;
VgaClassPrivate->SimpleTextOut.TestString = VgaClassTestString;
VgaClassPrivate->SimpleTextOut.ClearScreen = VgaClassClearScreen;
VgaClassPrivate->SimpleTextOut.SetAttribute = VgaClassSetAttribute;
VgaClassPrivate->SimpleTextOut.SetCursorPosition = VgaClassSetCursorPosition;
VgaClassPrivate->SimpleTextOut.EnableCursor = VgaClassEnableCursor;
VgaClassPrivate->SimpleTextOut.QueryMode = VgaClassQueryMode;
VgaClassPrivate->SimpleTextOut.SetMode = VgaClassSetMode;
VgaClassPrivate->SimpleTextOut.Mode = &VgaClassPrivate->SimpleTextOutputMode;
VgaClassPrivate->SimpleTextOutputMode.MaxMode = VgaMiniPort->MaxMode;
VgaClassPrivate->DevicePath = DevicePath;
Status = VgaClassPrivate->SimpleTextOut.SetAttribute (
&VgaClassPrivate->SimpleTextOut,
EFI_TEXT_ATTR (EFI_WHITE,
EFI_BLACK)
);
if (EFI_ERROR (Status)) {
goto ErrorExit;
}
Status = VgaClassPrivate->SimpleTextOut.Reset (
&VgaClassPrivate->SimpleTextOut,
FALSE
);
if (EFI_ERROR (Status)) {
goto ErrorExit;
}
Status = VgaClassPrivate->SimpleTextOut.EnableCursor (
&VgaClassPrivate->SimpleTextOut,
TRUE
);
if (EFI_ERROR (Status)) {
goto ErrorExit;
}
Status = gBS->InstallMultipleProtocolInterfaces (
&Controller,
&gEfiSimpleTextOutProtocolGuid,
&VgaClassPrivate->SimpleTextOut,
NULL
);
return Status;
ErrorExit:
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
EFI_PERIPHERAL_LOCAL_CONSOLE | EFI_P_EC_CONTROLLER_ERROR,
DevicePath
);
return Status;
}
/**
Stop this driver on ControllerHandle. Support stoping any child handles
created by this driver.
@param This Protocol instance pointer.
@param ControllerHandle Handle of device to stop driver on
@param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of
children is zero stop the entire bus driver.
@param ChildHandleBuffer List of Child Handles to Stop.
@retval EFI_SUCCESS This driver is removed ControllerHandle
@retval other This driver was not removed from this device
**/
EFI_STATUS
EFIAPI
VgaClassDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
{
EFI_STATUS Status;
EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *SimpleTextOut;
VGA_CLASS_DEV *VgaClassPrivate;
Status = gBS->OpenProtocol (
Controller,
&gEfiSimpleTextOutProtocolGuid,
(VOID **) &SimpleTextOut,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
VgaClassPrivate = VGA_CLASS_DEV_FROM_THIS (SimpleTextOut);
//
// Report that VGA Class driver is being disabled
//
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
EFI_PERIPHERAL_LOCAL_CONSOLE | EFI_P_PC_DISABLE,
VgaClassPrivate->DevicePath
);
Status = gBS->UninstallProtocolInterface (
Controller,
&gEfiSimpleTextOutProtocolGuid,
&VgaClassPrivate->SimpleTextOut
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Release PCI I/O and VGA Mini Port Protocols on the controller handle.
//
gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
gBS->CloseProtocol (
Controller,
&gEfiVgaMiniPortProtocolGuid,
This->DriverBindingHandle,
Controller
);
gBS->FreePool (VgaClassPrivate);
return EFI_SUCCESS;
}
/**
Reset VgaClass device and clear output.
@param This Pointer to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.
@param ExtendedVerification Whether need additional judgement
**/
EFI_STATUS
EFIAPI
VgaClassReset (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN BOOLEAN ExtendedVerification
)
{
EFI_STATUS Status;
VGA_CLASS_DEV *VgaClassPrivate;
VgaClassPrivate = VGA_CLASS_DEV_FROM_THIS (This);
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
EFI_PERIPHERAL_LOCAL_CONSOLE | EFI_P_PC_RESET,
VgaClassPrivate->DevicePath
);
This->SetAttribute (This, EFI_TEXT_ATTR (This->Mode->Attribute & 0x0F, EFI_BACKGROUND_BLACK));
Status = This->SetMode (This, 0);
if (EFI_ERROR (Status)) {
return Status;
}
return This->ClearScreen (This);
}
/**
Output a string to VgaClass device.
@param This Pointer to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.
@param WString wide chars.
**/
EFI_STATUS
EFIAPI
VgaClassOutputString (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN CHAR16 *WString
)
{
EFI_STATUS Status;
VGA_CLASS_DEV *VgaClassDev;
EFI_SIMPLE_TEXT_OUTPUT_MODE *Mode;
UINTN MaxColumn;
UINTN MaxRow;
UINT32 VideoChar;
CHAR8 GraphicChar;
VgaClassDev = VGA_CLASS_DEV_FROM_THIS (This);
Mode = This->Mode;
Status = This->QueryMode (
This,
Mode->Mode,
&MaxColumn,
&MaxRow
);
if (EFI_ERROR (Status)) {
return Status;
}
for (; *WString != CHAR_NULL; WString++) {
switch (*WString) {
case CHAR_BACKSPACE:
if (Mode->CursorColumn > 0) {
Mode->CursorColumn--;
}
break;
case CHAR_LINEFEED:
if (Mode->CursorRow == (INT32) (MaxRow - 1)) {
//
// Scroll the screen by copying the contents
// of the VGA display up one line
//
VgaClassDev->PciIo->CopyMem (
VgaClassDev->PciIo,
EfiPciIoWidthUint32,
VgaClassDev->VgaMiniPort->VgaMemoryBar,
VgaClassDev->VgaMiniPort->VgaMemoryOffset,
VgaClassDev->VgaMiniPort->VgaMemoryBar,
VgaClassDev->VgaMiniPort->VgaMemoryOffset + MaxColumn * 2,
((MaxRow - 1) * MaxColumn) >> 1
);
//
// Print Blank Line of spaces with the current color attributes
//
VideoChar = (Mode->Attribute << 8) | ' ';
VideoChar = (VideoChar << 16) | VideoChar;
VgaClassDev->PciIo->Mem.Write (
VgaClassDev->PciIo,
EfiPciIoWidthFillUint32,
VgaClassDev->VgaMiniPort->VgaMemoryBar,
VgaClassDev->VgaMiniPort->VgaMemoryOffset + (MaxRow - 1) * MaxColumn * 2,
MaxColumn >> 1,
&VideoChar
);
}
if (Mode->CursorRow < (INT32) (MaxRow - 1)) {
Mode->CursorRow++;
}
break;
case CHAR_CARRIAGE_RETURN:
Mode->CursorColumn = 0;
break;
default:
if (!LibIsValidTextGraphics (*WString, &GraphicChar, NULL)) {
//
// Just convert to ASCII
//
GraphicChar = (CHAR8) *WString;
if (!IsValidAscii (GraphicChar)) {
//
// Keep the API from supporting PCANSI Graphics chars
//
GraphicChar = '?';
}
}
VideoChar = (Mode->Attribute << 8) | GraphicChar;
VgaClassDev->PciIo->Mem.Write (
VgaClassDev->PciIo,
EfiPciIoWidthUint16,
VgaClassDev->VgaMiniPort->VgaMemoryBar,
VgaClassDev->VgaMiniPort->VgaMemoryOffset + ((Mode->CursorRow * MaxColumn + Mode->CursorColumn) * 2),
1,
&VideoChar
);
if (Mode->CursorColumn >= (INT32) (MaxColumn - 1)) {
This->OutputString (This, CrLfString);
} else {
Mode->CursorColumn++;
}
break;
}
}
SetVideoCursorPosition (
VgaClassDev,
(UINTN) Mode->CursorColumn,
(UINTN) Mode->CursorRow,
MaxColumn
);
return EFI_SUCCESS;
}
/**
Detects if a Unicode char is for Box Drawing text graphics.
@param This Pointer of EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
@param WString Unicode chars
@return if a Unicode char is for Box Drawing text graphics.
**/
EFI_STATUS
EFIAPI
VgaClassTestString (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN CHAR16 *WString
)
{
while (*WString != 0x0000) {
if (!(IsValidAscii (*WString) || IsValidEfiCntlChar (*WString) || LibIsValidTextGraphics (*WString, NULL, NULL))) {
return EFI_UNSUPPORTED;
}
WString++;
}
return EFI_SUCCESS;
}
/**
Clear Screen via VgaClass device
@param This Pointer of EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
@retval EFI_SUCESS Success to clear screen
@retval Others Wrong displaying mode.
**/
EFI_STATUS
EFIAPI
VgaClassClearScreen (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This
)
{
EFI_STATUS Status;
VGA_CLASS_DEV *VgaClassDev;
UINTN MaxRow;
UINTN MaxColumn;
UINT32 VideoChar;
VgaClassDev = VGA_CLASS_DEV_FROM_THIS (This);
Status = This->QueryMode (
This,
This->Mode->Mode,
&MaxColumn,
&MaxRow
);
if (EFI_ERROR (Status)) {
return Status;
}
VideoChar = (This->Mode->Attribute << 8) | ' ';
VideoChar = (VideoChar << 16) | VideoChar;
VgaClassDev->PciIo->Mem.Write (
VgaClassDev->PciIo,
EfiPciIoWidthFillUint32,
VgaClassDev->VgaMiniPort->VgaMemoryBar,
VgaClassDev->VgaMiniPort->VgaMemoryOffset,
(MaxRow * MaxColumn) >> 1,
&VideoChar
);
This->SetCursorPosition (This, 0, 0);
return EFI_SUCCESS;
}
/**
Set displaying mode's attribute
@param This Pointer of EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
@param Attribute Mode's attribute
@param EFI_SUCCESS Success to set attribute
@param EFI_UNSUPPORTED Wrong mode's attribute wanted to be set
**/
EFI_STATUS
EFIAPI
VgaClassSetAttribute (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN UINTN Attribute
)
{
if (Attribute <= EFI_MAX_ATTRIBUTE) {
This->Mode->Attribute = (INT32) Attribute;
return EFI_SUCCESS;
}
return EFI_UNSUPPORTED;
}
/**
Set cursor position.
@param This Pointer of EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
@param Column Column of new cursor position.
@param Row Row of new cursor position.
@retval EFI_SUCCESS Sucess to set cursor's position.
@retval Others Wrong current displaying mode.
**/
EFI_STATUS
EFIAPI
VgaClassSetCursorPosition (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN UINTN Column,
IN UINTN Row
)
{
EFI_STATUS Status;
VGA_CLASS_DEV *VgaClassDev;
UINTN MaxColumn;
UINTN MaxRow;
VgaClassDev = VGA_CLASS_DEV_FROM_THIS (This);
Status = This->QueryMode (
This,
This->Mode->Mode,
&MaxColumn,
&MaxRow
);
if (EFI_ERROR (Status)) {
return Status;
}
if (Column >= MaxColumn || Row >= MaxRow) {
return EFI_UNSUPPORTED;
}
SetVideoCursorPosition (VgaClassDev, Column, Row, MaxColumn);
This->Mode->CursorColumn = (INT32) Column;
This->Mode->CursorRow = (INT32) Row;
return EFI_SUCCESS;
}
/**
Enable cursor to display or not.
@param This Pointer of EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
@param Visible Display cursor or not.
@retval EFI_SUCESS Success to display the cursor or not.
**/
EFI_STATUS
EFIAPI
VgaClassEnableCursor (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN BOOLEAN Visible
)
{
VGA_CLASS_DEV *VgaClassDev;
VgaClassDev = VGA_CLASS_DEV_FROM_THIS (This);
if (Visible) {
switch (This->Mode->Mode) {
case 1:
WriteCrtc (VgaClassDev, CRTC_CURSOR_START, 0x06);
WriteCrtc (VgaClassDev, CRTC_CURSOR_END, 0x07);
break;
default:
WriteCrtc (VgaClassDev, CRTC_CURSOR_START, 0x0e);
WriteCrtc (VgaClassDev, CRTC_CURSOR_END, 0x0f);
break;
}
} else {
WriteCrtc (VgaClassDev, CRTC_CURSOR_START, 0x20);
}
This->Mode->CursorVisible = Visible;
return EFI_SUCCESS;
}
/**
Query colum and row according displaying mode number
The mode:
0: 80 * 25
1: 80 * 50
@param This Pointer of EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
@param ModeNumber Mode number
@param Columns return the columen in current mode number
@param Rows return the row in current mode number.
@return EFI_SUCCESS Sucess to get columns and rows according to mode number
@return EFI_UNSUPPORTED Unsupported mode number
**/
EFI_STATUS
EFIAPI
VgaClassQueryMode (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN UINTN ModeNumber,
OUT UINTN *Columns,
OUT UINTN *Rows
)
{
if ((INT32) ModeNumber >= This->Mode->MaxMode) {
*Columns = 0;
*Rows = 0;
return EFI_UNSUPPORTED;
}
switch (ModeNumber) {
case 0:
*Columns = 80;
*Rows = 25;
break;
case 1:
*Columns = 80;
*Rows = 50;
break;
default:
*Columns = 0;
*Rows = 0;
return EFI_UNSUPPORTED;
}
return EFI_SUCCESS;
}
/**
Set displaying mode number
@param This Pointer of EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
@param ModeNumber mode number
@retval EFI_UNSUPPORTED Unsupported mode number in parameter
@retval EFI_SUCCESS Success to set the mode number.
**/
EFI_STATUS
EFIAPI
VgaClassSetMode (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN UINTN ModeNumber
)
{
EFI_STATUS Status;
VGA_CLASS_DEV *VgaClassDev;
VgaClassDev = VGA_CLASS_DEV_FROM_THIS (This);
if ((INT32) ModeNumber >= This->Mode->MaxMode) {
return EFI_UNSUPPORTED;
}
This->ClearScreen (This);
This->Mode->Mode = (INT32) ModeNumber;
Status = VgaClassDev->VgaMiniPort->SetMode (VgaClassDev->VgaMiniPort, ModeNumber);
return Status;
}
/**
Set logic cursor's position to VgaClass device
@param VgaClassDev device instance object
@param Column cursor logic position.
@param Row cursor logic position.
@param MaxColumn max logic column
**/
VOID
SetVideoCursorPosition (
IN VGA_CLASS_DEV *VgaClassDev,
IN UINTN Column,
IN UINTN Row,
IN UINTN MaxColumn
)
{
Column = Column & 0xff;
Row = Row & 0xff;
MaxColumn = MaxColumn & 0xff;
WriteCrtc (
VgaClassDev,
CRTC_CURSOR_LOCATION_HIGH,
(UINT8) ((Row * MaxColumn + Column) >> 8)
);
WriteCrtc (
VgaClassDev,
CRTC_CURSOR_LOCATION_LOW,
(UINT8) ((Row * MaxColumn + Column) & 0xff)
);
}
/**
Program CRTC register via PCI IO.
@param VgaClassDev device instance object
@param Address address
@param Data data
**/
VOID
WriteCrtc (
IN VGA_CLASS_DEV *VgaClassDev,
IN UINT16 Address,
IN UINT8 Data
)
{
VgaClassDev->PciIo->Io.Write (
VgaClassDev->PciIo,
EfiPciIoWidthUint8,
VgaClassDev->VgaMiniPort->CrtcAddressRegisterBar,
VgaClassDev->VgaMiniPort->CrtcAddressRegisterOffset,
1,
&Address
);
VgaClassDev->PciIo->Io.Write (
VgaClassDev->PciIo,
EfiPciIoWidthUint8,
VgaClassDev->VgaMiniPort->CrtcDataRegisterBar,
VgaClassDev->VgaMiniPort->CrtcDataRegisterOffset,
1,
&Data
);
}
/**
Detects if a Unicode char is for Box Drawing text graphics.
@param Grphic Unicode char to test.
@param PcAnsi Optional pointer to return PCANSI equivalent of Graphic.
@param Asci Optional pointer to return Ascii equivalent of Graphic.
@return TRUE if Gpaphic is a supported Unicode Box Drawing character.
**/
BOOLEAN
LibIsValidTextGraphics (
IN CHAR16 Graphic,
OUT CHAR8 *PcAnsi, OPTIONAL
OUT CHAR8 *Ascii OPTIONAL
)
{
UNICODE_TO_CHAR *Table;
if ((((Graphic & 0xff00) != 0x2500) && ((Graphic & 0xff00) != 0x2100))) {
//
// Unicode drawing code charts are all in the 0x25xx range,
// arrows are 0x21xx
//
return FALSE;
}
for (Table = UnicodeToPcAnsiOrAscii; Table->Unicode != 0x0000; Table++) {
if (Graphic == Table->Unicode) {
if (PcAnsi) {
*PcAnsi = Table->PcAnsi;
}
if (Ascii) {
*Ascii = Table->Ascii;
}
return TRUE;
}
}
return FALSE;
}
/**
Judge whether is an ASCII char.
@param Ascii character
@return whether is an ASCII char.
**/
BOOLEAN
IsValidAscii (
IN CHAR16 Ascii
)
{
if ((Ascii >= 0x20) && (Ascii <= 0x7f)) {
return TRUE;
}
return FALSE;
}
/**
Judge whether is diplaying control character.
@param c character
@return whether is diplaying control character.
**/
BOOLEAN
IsValidEfiCntlChar (
IN CHAR16 c
)
{
if (c == CHAR_NULL || c == CHAR_BACKSPACE || c == CHAR_LINEFEED || c == CHAR_CARRIAGE_RETURN) {
return TRUE;
}
return FALSE;
}
|