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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* Copyright (C) 2012-2013 Kay Sievers <kay@vrfy.org>
* Copyright (C) 2012 Harald Hoyer <harald@redhat.com>
* Copyright (C) 2013 Intel Corporation
* Authored by Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
*/
#include <efi.h>
#include <efilib.h>
#include "util.h"
#include "graphics.h"
EFI_STATUS graphics_mode(BOOLEAN on) {
#define EFI_CONSOLE_CONTROL_PROTOCOL_GUID \
{ 0xf42f7782, 0x12e, 0x4c12, { 0x99, 0x56, 0x49, 0xf9, 0x43, 0x4, 0xf7, 0x21 } };
struct _EFI_CONSOLE_CONTROL_PROTOCOL;
typedef enum {
EfiConsoleControlScreenText,
EfiConsoleControlScreenGraphics,
EfiConsoleControlScreenMaxValue,
} EFI_CONSOLE_CONTROL_SCREEN_MODE;
typedef EFI_STATUS (EFIAPI *EFI_CONSOLE_CONTROL_PROTOCOL_GET_MODE)(
struct _EFI_CONSOLE_CONTROL_PROTOCOL *This,
EFI_CONSOLE_CONTROL_SCREEN_MODE *Mode,
BOOLEAN *UgaExists,
BOOLEAN *StdInLocked
);
typedef EFI_STATUS (EFIAPI *EFI_CONSOLE_CONTROL_PROTOCOL_SET_MODE)(
struct _EFI_CONSOLE_CONTROL_PROTOCOL *This,
EFI_CONSOLE_CONTROL_SCREEN_MODE Mode
);
typedef EFI_STATUS (EFIAPI *EFI_CONSOLE_CONTROL_PROTOCOL_LOCK_STD_IN)(
struct _EFI_CONSOLE_CONTROL_PROTOCOL *This,
CHAR16 *Password
);
typedef struct _EFI_CONSOLE_CONTROL_PROTOCOL {
EFI_CONSOLE_CONTROL_PROTOCOL_GET_MODE GetMode;
EFI_CONSOLE_CONTROL_PROTOCOL_SET_MODE SetMode;
EFI_CONSOLE_CONTROL_PROTOCOL_LOCK_STD_IN LockStdIn;
} EFI_CONSOLE_CONTROL_PROTOCOL;
EFI_GUID ConsoleControlProtocolGuid = EFI_CONSOLE_CONTROL_PROTOCOL_GUID;
EFI_CONSOLE_CONTROL_PROTOCOL *ConsoleControl = NULL;
EFI_CONSOLE_CONTROL_SCREEN_MODE new;
EFI_CONSOLE_CONTROL_SCREEN_MODE current;
BOOLEAN uga_exists;
BOOLEAN stdin_locked;
EFI_STATUS err;
err = LibLocateProtocol(&ConsoleControlProtocolGuid, (VOID **)&ConsoleControl);
if (EFI_ERROR(err)) {
/* console control protocol is nonstandard and might not exist. */
return err == EFI_NOT_FOUND ? EFI_SUCCESS : err;
}
/* check current mode */
err = uefi_call_wrapper(ConsoleControl->GetMode, 4, ConsoleControl, ¤t, &uga_exists, &stdin_locked);
if (EFI_ERROR(err))
return err;
/* do not touch the mode */
new = on ? EfiConsoleControlScreenGraphics : EfiConsoleControlScreenText;
if (new == current)
return EFI_SUCCESS;
err = uefi_call_wrapper(ConsoleControl->SetMode, 2, ConsoleControl, new);
/* some firmware enables the cursor when switching modes */
uefi_call_wrapper(ST->ConOut->EnableCursor, 2, ST->ConOut, FALSE);
return err;
}
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