45fe668f5f
The BIOS leaves the keyboard enabled during boot time so that any keystroke would interfere kernel driver initialization. Add a way to disable the keyboard to make sure no scancode will be generated during the boot time. Note that the keyboard will be re-enabled again after the kernel driver is up. This code can be called from the board functions. Signed-off-by: Louis Yung-Chieh Lo <yjlou@chromium.org> Signed-off-by: Louis Yung-Chieh Lo <yjlou@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Rini <trini@ti.com>
96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
/*
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* (C) Copyright 2002 ELTEC Elektronik AG
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* Frank Gottschling <fgottschling@eltec.de>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/* i8042.h - Intel 8042 keyboard driver header */
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#ifndef _I8042_H_
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#define _I8042_H_
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#ifdef __I386__
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#include <common.h>
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#include <asm/io.h>
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#define in8(p) inb(p)
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#define out8(p,v) outb(v,p)
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#endif
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/* defines */
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#define I8042_DATA_REG (CONFIG_SYS_ISA_IO + 0x0060) /* keyboard i/o buffer */
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#define I8042_STATUS_REG (CONFIG_SYS_ISA_IO + 0x0064) /* keyboard status read */
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#define I8042_COMMAND_REG (CONFIG_SYS_ISA_IO + 0x0064) /* keyboard ctrl write */
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enum {
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/* Output register (I8042_DATA_REG) has data for system */
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I8042_STATUS_OUT_DATA = 1 << 0,
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I8042_STATUS_IN_DATA = 1 << 1,
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};
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#define KBD_US 0 /* default US layout */
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#define KBD_GER 1 /* german layout */
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#define KBD_TIMEOUT 1000 /* 1 sec */
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#define KBD_RESET_TRIES 3
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#define AS 0 /* normal character index */
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#define SH 1 /* shift index */
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#define CN 2 /* control index */
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#define NM 3 /* numeric lock index */
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#define AK 4 /* right alt key */
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#define CP 5 /* capslock index */
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#define ST 6 /* stop output index */
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#define EX 7 /* extended code index */
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#define ES 8 /* escape and extended code index */
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#define NORMAL 0x0000 /* normal key */
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#define STP 0x0001 /* scroll lock stop output*/
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#define NUM 0x0002 /* numeric lock */
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#define CAPS 0x0004 /* capslock */
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#define SHIFT 0x0008 /* shift */
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#define CTRL 0x0010 /* control*/
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#define EXT 0x0020 /* extended scan code 0xe0 */
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#define ESC 0x0040 /* escape key press */
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#define E1 0x0080 /* extended scan code 0xe1 */
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#define BRK 0x0100 /* make break flag for keyboard */
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#define ALT 0x0200 /* right alt */
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/* exports */
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/**
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* Flush all buffer from keyboard controller to host.
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*/
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void i8042_flush(void);
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/**
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* Disables the keyboard so that key strokes no longer generate scancodes to
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* the host.
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*
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* @return 0 if ok, -1 if keyboard input was found while disabling
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*/
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int i8042_disable(void);
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int i8042_kbd_init(void);
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int i8042_tstc(void);
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int i8042_getc(void);
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#endif /* _I8042_H_ */
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