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      1 /*	$NetBSD: efi_console.c,v 1.4 2009/07/20 04:59:03 kiyohara Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000 Doug Rabson
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 /* __FBSDID("$FreeBSD: src/sys/boot/efi/libefi/efi_console.c,v 1.5 2004/03/09 04:00:33 marcel Exp $"); */
     31 
     32 #include <efi.h>
     33 #include <efilib.h>
     34 #include <lib/libsa/stand.h>
     35 #include <lib/libsa/loadfile.h>
     36 
     37 #include "bootstrap.h"
     38 
     39 static SIMPLE_TEXT_OUTPUT_INTERFACE	*conout;
     40 static SIMPLE_INPUT_INTERFACE		*conin;
     41 
     42 static void
     43 efi_cons_probe(struct console *cp)
     44 {
     45 	conout = ST->ConOut;
     46 	conin = ST->ConIn;
     47 	cp->c_flags |= C_PRESENTIN | C_PRESENTOUT;
     48 }
     49 
     50 static int
     51 efi_cons_init(int arg)
     52 {
     53 	conout->SetAttribute(conout, EFI_TEXT_ATTR(EFI_LIGHTGRAY, EFI_BLACK));
     54 	return 0;
     55 }
     56 
     57 void
     58 efi_cons_putchar(int c)
     59 {
     60 	CHAR16 buf[2];
     61 
     62 	if (c == '\n')
     63 		efi_cons_putchar('\r');
     64 
     65 	buf[0] = c;
     66 	buf[1] = 0;
     67 
     68 	conout->OutputString(conout, buf);
     69 }
     70 
     71 int
     72 efi_cons_getchar(void)
     73 {
     74 	EFI_INPUT_KEY key;
     75 	EFI_STATUS status;
     76 	UINTN junk;
     77 
     78 	/* Try to read a key stroke. We wait for one if none is pending. */
     79 	status = conin->ReadKeyStroke(conin, &key);
     80 	if (status == EFI_NOT_READY) {
     81 		BS->WaitForEvent(1, &conin->WaitForKey, &junk);
     82 		status = conin->ReadKeyStroke(conin, &key);
     83 	}
     84 	return (key.UnicodeChar);
     85 }
     86 
     87 int
     88 efi_cons_poll(void)
     89 {
     90 	/* This can clear the signaled state. */
     91 	return (BS->CheckEvent(conin->WaitForKey) == EFI_SUCCESS);
     92 }
     93 
     94 struct console efi_console = {
     95 	"efi",
     96 	"EFI console",
     97 	0,
     98 	efi_cons_probe,
     99 	efi_cons_init,
    100 	efi_cons_putchar,
    101 	efi_cons_getchar,
    102 	efi_cons_poll
    103 };
    104