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/*++
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.
Module Name:
UnixUgaDriver.c
Abstract:
This file implements the EFI 1.1 Device Driver model requirements for UGA
UGA is short hand for Universal Graphics Abstraction protocol.
This file is a verision of UgaIo the uses UnixThunk system calls as an IO
abstraction. For a PCI device UnixIo would be replaced with
a PCI IO abstraction that abstracted a specific PCI device.
--*/
#include "UnixUga.h"
EFI_DRIVER_BINDING_PROTOCOL gUnixUgaDriverBinding = {
UnixUgaDriverBindingSupported,
UnixUgaDriverBindingStart,
UnixUgaDriverBindingStop,
0x10,
NULL,
NULL
};
EFI_STATUS
EFIAPI
UnixUgaDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Handle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: This - add argument and description to function comment
// TODO: Handle - add argument and description to function comment
// TODO: RemainingDevicePath - add argument and description to function comment
{
EFI_STATUS Status;
EFI_UNIX_IO_PROTOCOL *UnixIo;
//
// Open the IO Abstraction(s) needed to perform the supported test
//
Status = gBS->OpenProtocol (
Handle,
&gEfiUnixIoProtocolGuid,
(VOID **)&UnixIo,
This->DriverBindingHandle,
Handle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = UnixUgaSupported (UnixIo);
//
// Close the I/O Abstraction(s) used to perform the supported test
//
gBS->CloseProtocol (
Handle,
&gEfiUnixIoProtocolGuid,
This->DriverBindingHandle,
Handle
);
return Status;
}
EFI_STATUS
EFIAPI
UnixUgaDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Handle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: This - add argument and description to function comment
// TODO: Handle - add argument and description to function comment
// TODO: RemainingDevicePath - add argument and description to function comment
// TODO: EFI_UNSUPPORTED - add return value to function comment
{
EFI_UNIX_IO_PROTOCOL *UnixIo;
EFI_STATUS Status;
UGA_PRIVATE_DATA *Private;
//
// Grab the protocols we need
//
Status = gBS->OpenProtocol (
Handle,
&gEfiUnixIoProtocolGuid,
(VOID **)&UnixIo,
This->DriverBindingHandle,
Handle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return EFI_UNSUPPORTED;
}
//
// Allocate Private context data for SGO inteface.
//
Private = NULL;
Status = gBS->AllocatePool (
EfiBootServicesData,
sizeof (UGA_PRIVATE_DATA),
(VOID **)&Private
);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Set up context record
//
Private->Signature = UGA_PRIVATE_DATA_SIGNATURE;
Private->Handle = Handle;
Private->UnixThunk = UnixIo->UnixThunk;
Private->ControllerNameTable = NULL;
AddUnicodeString (
"eng",
gUnixUgaComponentName.SupportedLanguages,
&Private->ControllerNameTable,
UnixIo->EnvString
);
Private->WindowName = UnixIo->EnvString;
Status = UnixUgaConstructor (Private);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Publish the Uga interface to the world
//
Status = gBS->InstallMultipleProtocolInterfaces (
&Private->Handle,
&gEfiUgaDrawProtocolGuid,
&Private->UgaDraw,
&gEfiSimpleTextInProtocolGuid,
&Private->SimpleTextIn,
NULL
);
Done:
if (EFI_ERROR (Status)) {
gBS->CloseProtocol (
Handle,
&gEfiUnixIoProtocolGuid,
This->DriverBindingHandle,
Handle
);
if (Private != NULL) {
//
// On Error Free back private data
//
if (Private->ControllerNameTable != NULL) {
FreeUnicodeStringTable (Private->ControllerNameTable);
}
gBS->FreePool (Private);
}
}
return Status;
}
EFI_STATUS
EFIAPI
UnixUgaDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Handle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: This - add argument and description to function comment
// TODO: Handle - add argument and description to function comment
// TODO: NumberOfChildren - add argument and description to function comment
// TODO: ChildHandleBuffer - add argument and description to function comment
// TODO: EFI_NOT_STARTED - add return value to function comment
// TODO: EFI_DEVICE_ERROR - add return value to function comment
{
EFI_UGA_DRAW_PROTOCOL *UgaDraw;
EFI_STATUS Status;
UGA_PRIVATE_DATA *Private;
Status = gBS->OpenProtocol (
Handle,
&gEfiUgaDrawProtocolGuid,
(VOID **)&UgaDraw,
This->DriverBindingHandle,
Handle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
//
// If the UGA interface does not exist the driver is not started
//
return EFI_NOT_STARTED;
}
//
// Get our private context information
//
Private = UGA_DRAW_PRIVATE_DATA_FROM_THIS (UgaDraw);
//
// Remove the SGO interface from the system
//
Status = gBS->UninstallMultipleProtocolInterfaces (
Private->Handle,
&gEfiUgaDrawProtocolGuid,
&Private->UgaDraw,
&gEfiSimpleTextInProtocolGuid,
&Private->SimpleTextIn,
NULL
);
if (!EFI_ERROR (Status)) {
//
// Shutdown the hardware
//
Status = UnixUgaDestructor (Private);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
gBS->CloseProtocol (
Handle,
&gEfiUnixIoProtocolGuid,
This->DriverBindingHandle,
Handle
);
//
// Free our instance data
//
FreeUnicodeStringTable (Private->ControllerNameTable);
gBS->FreePool (Private);
}
return Status;
}
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