2017-11-18 17:09:20 +01:00
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/* SPDX-License-Identifier: LGPL-2.1+ */
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2015-02-08 12:25:35 +01:00
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* Copyright (C) 2012-2013 Kay Sievers <kay@vrfy.org>
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* Copyright (C) 2012 Harald Hoyer <harald@redhat.com>
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* Copyright (C) 2013 Intel Corporation
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* Authored by Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
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*/
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#include <efi.h>
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#include <efilib.h>
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#include "graphics.h"
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2015-11-16 22:09:36 +01:00
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#include "util.h"
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2015-02-08 12:25:35 +01:00
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EFI_STATUS graphics_mode(BOOLEAN on) {
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#define EFI_CONSOLE_CONTROL_PROTOCOL_GUID \
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{ 0xf42f7782, 0x12e, 0x4c12, { 0x99, 0x56, 0x49, 0xf9, 0x43, 0x4, 0xf7, 0x21 } };
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struct _EFI_CONSOLE_CONTROL_PROTOCOL;
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typedef enum {
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EfiConsoleControlScreenText,
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EfiConsoleControlScreenGraphics,
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EfiConsoleControlScreenMaxValue,
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} EFI_CONSOLE_CONTROL_SCREEN_MODE;
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typedef EFI_STATUS (EFIAPI *EFI_CONSOLE_CONTROL_PROTOCOL_GET_MODE)(
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struct _EFI_CONSOLE_CONTROL_PROTOCOL *This,
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EFI_CONSOLE_CONTROL_SCREEN_MODE *Mode,
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BOOLEAN *UgaExists,
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BOOLEAN *StdInLocked
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);
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typedef EFI_STATUS (EFIAPI *EFI_CONSOLE_CONTROL_PROTOCOL_SET_MODE)(
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struct _EFI_CONSOLE_CONTROL_PROTOCOL *This,
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EFI_CONSOLE_CONTROL_SCREEN_MODE Mode
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);
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typedef EFI_STATUS (EFIAPI *EFI_CONSOLE_CONTROL_PROTOCOL_LOCK_STD_IN)(
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struct _EFI_CONSOLE_CONTROL_PROTOCOL *This,
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CHAR16 *Password
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);
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typedef struct _EFI_CONSOLE_CONTROL_PROTOCOL {
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EFI_CONSOLE_CONTROL_PROTOCOL_GET_MODE GetMode;
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EFI_CONSOLE_CONTROL_PROTOCOL_SET_MODE SetMode;
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EFI_CONSOLE_CONTROL_PROTOCOL_LOCK_STD_IN LockStdIn;
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} EFI_CONSOLE_CONTROL_PROTOCOL;
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EFI_GUID ConsoleControlProtocolGuid = EFI_CONSOLE_CONTROL_PROTOCOL_GUID;
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EFI_CONSOLE_CONTROL_PROTOCOL *ConsoleControl = NULL;
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EFI_CONSOLE_CONTROL_SCREEN_MODE new;
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EFI_CONSOLE_CONTROL_SCREEN_MODE current;
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BOOLEAN uga_exists;
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BOOLEAN stdin_locked;
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EFI_STATUS err;
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err = LibLocateProtocol(&ConsoleControlProtocolGuid, (VOID **)&ConsoleControl);
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2015-09-09 14:23:02 +02:00
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if (EFI_ERROR(err))
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2015-02-08 12:25:35 +01:00
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/* console control protocol is nonstandard and might not exist. */
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return err == EFI_NOT_FOUND ? EFI_SUCCESS : err;
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/* check current mode */
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err = uefi_call_wrapper(ConsoleControl->GetMode, 4, ConsoleControl, ¤t, &uga_exists, &stdin_locked);
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if (EFI_ERROR(err))
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return err;
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/* do not touch the mode */
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new = on ? EfiConsoleControlScreenGraphics : EfiConsoleControlScreenText;
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if (new == current)
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return EFI_SUCCESS;
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err = uefi_call_wrapper(ConsoleControl->SetMode, 2, ConsoleControl, new);
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/* some firmware enables the cursor when switching modes */
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uefi_call_wrapper(ST->ConOut->EnableCursor, 2, ST->ConOut, FALSE);
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return err;
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}
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