/*      $NetBSD: efi_console.c,v 1.4 2009/07/20 04:59:03 kiyohara Exp $ */

/*-
 * Copyright (c) 2000 Doug Rabson
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
/* __FBSDID("$FreeBSD: src/sys/boot/efi/libefi/efi_console.c,v 1.5 2004/03/09 04:00:33 marcel Exp $"); */

#include <efi.h>
#include <efilib.h>
#include <lib/libsa/stand.h>
#include <lib/libsa/loadfile.h>

#include "bootstrap.h"

static SIMPLE_TEXT_OUTPUT_INTERFACE     *conout;
static SIMPLE_INPUT_INTERFACE           *conin;

static void
efi_cons_probe(struct console *cp)
{
        conout = ST->ConOut;
        conin = ST->ConIn;
        cp->c_flags |= C_PRESENTIN | C_PRESENTOUT;
}

static int
efi_cons_init(int arg)
{
        conout->SetAttribute(conout, EFI_TEXT_ATTR(EFI_LIGHTGRAY, EFI_BLACK));
        return 0;
}

void
efi_cons_putchar(int c)
{
        CHAR16 buf[2];

        if (c == '\n')
                efi_cons_putchar('\r');

        buf[0] = c;
        buf[1] = 0;

        conout->OutputString(conout, buf);
}

int
efi_cons_getchar(void)
{
        EFI_INPUT_KEY key;
        EFI_STATUS status;
        UINTN junk;

        /* Try to read a key stroke. We wait for one if none is pending. */
        status = conin->ReadKeyStroke(conin, &key);
        if (status == EFI_NOT_READY) {
                BS->WaitForEvent(1, &conin->WaitForKey, &junk);
                status = conin->ReadKeyStroke(conin, &key);
        }
        return (key.UnicodeChar);
}

int
efi_cons_poll(void)
{
        /* This can clear the signaled state. */
        return (BS->CheckEvent(conin->WaitForKey) == EFI_SUCCESS);
}

struct console efi_console = {
        "efi",
        "EFI console",
        0,
        efi_cons_probe,
        efi_cons_init,
        efi_cons_putchar,
        efi_cons_getchar,
        efi_cons_poll
};